File civetweb-1.16-CVE-2025-9648.patch of Package civetweb
diff -Nurp civetweb-1.16-orig/.pc/applied-patches civetweb-1.16/.pc/applied-patches
--- civetweb-1.16-orig/.pc/applied-patches 1970-01-01 01:00:00.000000000 +0100
+++ civetweb-1.16/.pc/applied-patches 2025-09-30 09:16:33.867771915 +0200
@@ -0,0 +1 @@
+civetweb-1.16-CVE-2025-9648.patch
diff -Nurp civetweb-1.16-orig/.pc/civetweb-1.16-CVE-2025-9648.patch/src/civetweb.c civetweb-1.16/.pc/civetweb-1.16-CVE-2025-9648.patch/src/civetweb.c
--- civetweb-1.16-orig/.pc/civetweb-1.16-CVE-2025-9648.patch/src/civetweb.c 1970-01-01 01:00:00.000000000 +0100
+++ civetweb-1.16/.pc/civetweb-1.16-CVE-2025-9648.patch/src/civetweb.c 2023-04-08 17:38:36.000000000 +0200
@@ -0,0 +1,22519 @@
+/* Copyright (c) 2013-2021 the Civetweb developers
+ * Copyright (c) 2004-2013 Sergey Lyubka
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#if defined(__GNUC__) || defined(__MINGW32__)
+#ifndef GCC_VERSION
+#define GCC_VERSION \
+ (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+#endif
+#if GCC_VERSION >= 40500
+/* gcc diagnostic pragmas available */
+#define GCC_DIAGNOSTIC
+#endif
+#endif
+
+#if defined(GCC_DIAGNOSTIC)
+/* Disable unused macros warnings - not all defines are required
+ * for all systems and all compilers. */
+#pragma GCC diagnostic ignored "-Wunused-macros"
+/* A padding warning is just plain useless */
+#pragma GCC diagnostic ignored "-Wpadded"
+#endif
+
+#if defined(__clang__) /* GCC does not (yet) support this pragma */
+/* We must set some flags for the headers we include. These flags
+ * are reserved ids according to C99, so we need to disable a
+ * warning for that. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wreserved-id-macro"
+#endif
+
+#if defined(_WIN32)
+#if !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005 */
+#endif
+#if !defined(_WIN32_WINNT) /* defined for tdm-gcc so we can use getnameinfo */
+#define _WIN32_WINNT 0x0502
+#endif
+#else
+#if !defined(_GNU_SOURCE)
+#define _GNU_SOURCE /* for setgroups(), pthread_setname_np() */
+#endif
+#if defined(__linux__) && !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE 600 /* For flockfile() on Linux */
+#endif
+#if defined(__LSB_VERSION__) || defined(__sun)
+#define NEED_TIMEGM
+#define NO_THREAD_NAME
+#endif
+#if !defined(_LARGEFILE_SOURCE)
+#define _LARGEFILE_SOURCE /* For fseeko(), ftello() */
+#endif
+#if !defined(_FILE_OFFSET_BITS)
+#define _FILE_OFFSET_BITS 64 /* Use 64-bit file offsets by default */
+#endif
+#if !defined(__STDC_FORMAT_MACROS)
+#define __STDC_FORMAT_MACROS /* <inttypes.h> wants this for C++ */
+#endif
+#if !defined(__STDC_LIMIT_MACROS)
+#define __STDC_LIMIT_MACROS /* C++ wants that for INT64_MAX */
+#endif
+#if !defined(_DARWIN_UNLIMITED_SELECT)
+#define _DARWIN_UNLIMITED_SELECT
+#endif
+#if defined(__sun)
+#define __EXTENSIONS__ /* to expose flockfile and friends in stdio.h */
+#define __inline inline /* not recognized on older compiler versions */
+#endif
+#endif
+
+#if defined(__clang__)
+/* Enable reserved-id-macro warning again. */
+#pragma GCC diagnostic pop
+#endif
+
+
+#if defined(USE_LUA)
+#define USE_TIMERS
+#endif
+
+#if defined(_MSC_VER)
+/* 'type cast' : conversion from 'int' to 'HANDLE' of greater size */
+#pragma warning(disable : 4306)
+/* conditional expression is constant: introduced by FD_SET(..) */
+#pragma warning(disable : 4127)
+/* non-constant aggregate initializer: issued due to missing C99 support */
+#pragma warning(disable : 4204)
+/* padding added after data member */
+#pragma warning(disable : 4820)
+/* not defined as a preprocessor macro, replacing with '0' for '#if/#elif' */
+#pragma warning(disable : 4668)
+/* no function prototype given: converting '()' to '(void)' */
+#pragma warning(disable : 4255)
+/* function has been selected for automatic inline expansion */
+#pragma warning(disable : 4711)
+#endif
+
+
+/* This code uses static_assert to check some conditions.
+ * Unfortunately some compilers still do not support it, so we have a
+ * replacement function here. */
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 201100L
+#define mg_static_assert _Static_assert
+#elif defined(__cplusplus) && __cplusplus >= 201103L
+#define mg_static_assert static_assert
+#else
+char static_assert_replacement[1];
+#define mg_static_assert(cond, txt) \
+ extern char static_assert_replacement[(cond) ? 1 : -1]
+#endif
+
+mg_static_assert(sizeof(int) == 4 || sizeof(int) == 8,
+ "int data type size check");
+mg_static_assert(sizeof(void *) == 4 || sizeof(void *) == 8,
+ "pointer data type size check");
+mg_static_assert(sizeof(void *) >= sizeof(int), "data type size check");
+
+
+/* Select queue implementation. Diagnosis features originally only implemented
+ * for the "ALTERNATIVE_QUEUE" have been ported to the previous queue
+ * implementation (NO_ALTERNATIVE_QUEUE) as well. The new configuration value
+ * "CONNECTION_QUEUE_SIZE" is only available for the previous queue
+ * implementation, since the queue length is independent from the number of
+ * worker threads there, while the new queue is one element per worker thread.
+ *
+ */
+#if defined(NO_ALTERNATIVE_QUEUE) && defined(ALTERNATIVE_QUEUE)
+/* The queues are exclusive or - only one can be used. */
+#error \
+ "Define ALTERNATIVE_QUEUE or NO_ALTERNATIVE_QUEUE (or none of them), but not both"
+#endif
+#if !defined(NO_ALTERNATIVE_QUEUE) && !defined(ALTERNATIVE_QUEUE)
+/* Use a default implementation */
+#define NO_ALTERNATIVE_QUEUE
+#endif
+
+#if defined(NO_FILESYSTEMS) && !defined(NO_FILES)
+/* File system access:
+ * NO_FILES = do not serve any files from the file system automatically.
+ * However, with NO_FILES CivetWeb may still write log files, read access
+ * control files, default error page files or use API functions like
+ * mg_send_file in callbacks to send files from the server local
+ * file system.
+ * NO_FILES only disables the automatic mapping between URLs and local
+ * file names.
+ * NO_FILESYSTEM = do not access any file at all. Useful for embedded
+ * devices without file system. Logging to files in not available
+ * (use callbacks instead) and API functions like mg_send_file are not
+ * available.
+ * If NO_FILESYSTEM is set, NO_FILES must be set as well.
+ */
+#error "Inconsistent build flags, NO_FILESYSTEMS requires NO_FILES"
+#endif
+
+/* DTL -- including winsock2.h works better if lean and mean */
+#if !defined(WIN32_LEAN_AND_MEAN)
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#if defined(__SYMBIAN32__)
+/* According to https://en.wikipedia.org/wiki/Symbian#History,
+ * Symbian is no longer maintained since 2014-01-01.
+ * Support for Symbian has been removed from CivetWeb
+ */
+#error "Symbian is no longer maintained. CivetWeb no longer supports Symbian."
+#endif /* __SYMBIAN32__ */
+
+#if defined(__ZEPHYR__)
+#include <ctype.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <poll.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <time.h>
+
+#include <zephyr/kernel.h>
+
+/* Max worker threads is the max of pthreads minus the main application thread
+ * and minus the main civetweb thread, thus -2
+ */
+#define MAX_WORKER_THREADS (CONFIG_MAX_PTHREAD_COUNT - 2)
+
+#if defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1)
+#define ZEPHYR_STACK_SIZE USE_STACK_SIZE
+#else
+#define ZEPHYR_STACK_SIZE (1024 * 16)
+#endif
+
+K_THREAD_STACK_DEFINE(civetweb_main_stack, ZEPHYR_STACK_SIZE);
+K_THREAD_STACK_ARRAY_DEFINE(civetweb_worker_stacks,
+ MAX_WORKER_THREADS,
+ ZEPHYR_STACK_SIZE);
+
+static int zephyr_worker_stack_index;
+
+#endif
+
+#if !defined(CIVETWEB_HEADER_INCLUDED)
+/* Include the header file here, so the CivetWeb interface is defined for the
+ * entire implementation, including the following forward definitions. */
+#include "civetweb.h"
+#endif
+
+#if !defined(DEBUG_TRACE)
+#if defined(DEBUG)
+static void DEBUG_TRACE_FUNC(const char *func,
+ unsigned line,
+ PRINTF_FORMAT_STRING(const char *fmt),
+ ...) PRINTF_ARGS(3, 4);
+
+#define DEBUG_TRACE(fmt, ...) \
+ DEBUG_TRACE_FUNC(__func__, __LINE__, fmt, __VA_ARGS__)
+
+#define NEED_DEBUG_TRACE_FUNC
+#if !defined(DEBUG_TRACE_STREAM)
+#define DEBUG_TRACE_STREAM stdout
+#endif
+
+#else
+#define DEBUG_TRACE(fmt, ...) \
+ do { \
+ } while (0)
+#endif /* DEBUG */
+#endif /* DEBUG_TRACE */
+
+
+#if !defined(DEBUG_ASSERT)
+#if defined(DEBUG)
+#include <stdlib.h>
+#define DEBUG_ASSERT(cond) \
+ do { \
+ if (!(cond)) { \
+ DEBUG_TRACE("ASSERTION FAILED: %s", #cond); \
+ exit(2); /* Exit with error */ \
+ } \
+ } while (0)
+#else
+#define DEBUG_ASSERT(cond)
+#endif /* DEBUG */
+#endif
+
+
+#if defined(__GNUC__) && defined(GCC_INSTRUMENTATION)
+void __cyg_profile_func_enter(void *this_fn, void *call_site)
+ __attribute__((no_instrument_function));
+
+void __cyg_profile_func_exit(void *this_fn, void *call_site)
+ __attribute__((no_instrument_function));
+
+void
+__cyg_profile_func_enter(void *this_fn, void *call_site)
+{
+ if ((void *)this_fn != (void *)printf) {
+ printf("E %p %p\n", this_fn, call_site);
+ }
+}
+
+void
+__cyg_profile_func_exit(void *this_fn, void *call_site)
+{
+ if ((void *)this_fn != (void *)printf) {
+ printf("X %p %p\n", this_fn, call_site);
+ }
+}
+#endif
+
+
+#if !defined(IGNORE_UNUSED_RESULT)
+#define IGNORE_UNUSED_RESULT(a) ((void)((a) && 1))
+#endif
+
+
+#if defined(__GNUC__) || defined(__MINGW32__)
+
+/* GCC unused function attribute seems fundamentally broken.
+ * Several attempts to tell the compiler "THIS FUNCTION MAY BE USED
+ * OR UNUSED" for individual functions failed.
+ * Either the compiler creates an "unused-function" warning if a
+ * function is not marked with __attribute__((unused)).
+ * On the other hand, if the function is marked with this attribute,
+ * but is used, the compiler raises a completely idiotic
+ * "used-but-marked-unused" warning - and
+ * #pragma GCC diagnostic ignored "-Wused-but-marked-unused"
+ * raises error: unknown option after "#pragma GCC diagnostic".
+ * Disable this warning completely, until the GCC guys sober up
+ * again.
+ */
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+
+#define FUNCTION_MAY_BE_UNUSED /* __attribute__((unused)) */
+
+#else
+#define FUNCTION_MAY_BE_UNUSED
+#endif
+
+
+/* Some ANSI #includes are not available on Windows CE and Zephyr */
+#if !defined(_WIN32_WCE) && !defined(__ZEPHYR__)
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#endif /* !_WIN32_WCE */
+
+
+#if defined(__clang__)
+/* When using -Weverything, clang does not accept it's own headers
+ * in a release build configuration. Disable what is too much in
+ * -Weverything. */
+#pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
+#endif
+
+#if defined(__GNUC__) || defined(__MINGW32__)
+/* Who on earth came to the conclusion, using __DATE__ should rise
+ * an "expansion of date or time macro is not reproducible"
+ * warning. That's exactly what was intended by using this macro.
+ * Just disable this nonsense warning. */
+
+/* And disabling them does not work either:
+ * #pragma clang diagnostic ignored "-Wno-error=date-time"
+ * #pragma clang diagnostic ignored "-Wdate-time"
+ * So we just have to disable ALL warnings for some lines
+ * of code.
+ * This seems to be a known GCC bug, not resolved since 2012:
+ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53431
+ */
+#endif
+
+
+#if defined(__MACH__) && defined(__APPLE__) /* Apple OSX section */
+
+#if defined(__clang__)
+#if (__clang_major__ == 3) && ((__clang_minor__ == 7) || (__clang_minor__ == 8))
+/* Avoid warnings for Xcode 7. It seems it does no longer exist in Xcode 8 */
+#pragma clang diagnostic ignored "-Wno-reserved-id-macro"
+#pragma clang diagnostic ignored "-Wno-keyword-macro"
+#endif
+#endif
+
+#ifndef CLOCK_MONOTONIC
+#define CLOCK_MONOTONIC (1)
+#endif
+#ifndef CLOCK_REALTIME
+#define CLOCK_REALTIME (2)
+#endif
+
+#include <mach/clock.h>
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+
+/* clock_gettime is not implemented on OSX prior to 10.12 */
+static int
+_civet_clock_gettime(int clk_id, struct timespec *t)
+{
+ memset(t, 0, sizeof(*t));
+ if (clk_id == CLOCK_REALTIME) {
+ struct timeval now;
+ int rv = gettimeofday(&now, NULL);
+ if (rv) {
+ return rv;
+ }
+ t->tv_sec = now.tv_sec;
+ t->tv_nsec = now.tv_usec * 1000;
+ return 0;
+
+ } else if (clk_id == CLOCK_MONOTONIC) {
+ static uint64_t clock_start_time = 0;
+ static mach_timebase_info_data_t timebase_ifo = {0, 0};
+
+ uint64_t now = mach_absolute_time();
+
+ if (clock_start_time == 0) {
+ kern_return_t mach_status = mach_timebase_info(&timebase_ifo);
+ DEBUG_ASSERT(mach_status == KERN_SUCCESS);
+
+ /* appease "unused variable" warning for release builds */
+ (void)mach_status;
+
+ clock_start_time = now;
+ }
+
+ now = (uint64_t)((double)(now - clock_start_time)
+ * (double)timebase_ifo.numer
+ / (double)timebase_ifo.denom);
+
+ t->tv_sec = now / 1000000000;
+ t->tv_nsec = now % 1000000000;
+ return 0;
+ }
+ return -1; /* EINVAL - Clock ID is unknown */
+}
+
+/* if clock_gettime is declared, then __CLOCK_AVAILABILITY will be defined */
+#if defined(__CLOCK_AVAILABILITY)
+/* If we compiled with Mac OSX 10.12 or later, then clock_gettime will be
+ * declared but it may be NULL at runtime. So we need to check before using
+ * it. */
+static int
+_civet_safe_clock_gettime(int clk_id, struct timespec *t)
+{
+ if (clock_gettime) {
+ return clock_gettime(clk_id, t);
+ }
+ return _civet_clock_gettime(clk_id, t);
+}
+#define clock_gettime _civet_safe_clock_gettime
+#else
+#define clock_gettime _civet_clock_gettime
+#endif
+
+#endif
+
+
+#if defined(_WIN32)
+#define ERROR_TRY_AGAIN(err) ((err) == WSAEWOULDBLOCK)
+#else
+/* Unix might return different error codes indicating to try again.
+ * For Linux EAGAIN==EWOULDBLOCK, maybe EAGAIN!=EWOULDBLOCK is history from
+ * decades ago, but better check both and let the compiler optimize it. */
+#define ERROR_TRY_AGAIN(err) \
+ (((err) == EAGAIN) || ((err) == EWOULDBLOCK) || ((err) == EINTR))
+#endif
+
+#if defined(USE_ZLIB)
+#include "zconf.h"
+#include "zlib.h"
+#endif
+
+
+/********************************************************************/
+/* CivetWeb configuration defines */
+/********************************************************************/
+
+/* Maximum number of threads that can be configured.
+ * The number of threads actually created depends on the "num_threads"
+ * configuration parameter, but this is the upper limit. */
+#if !defined(MAX_WORKER_THREADS)
+#define MAX_WORKER_THREADS (1024 * 64) /* in threads (count) */
+#endif
+
+/* Timeout interval for select/poll calls.
+ * The timeouts depend on "*_timeout_ms" configuration values, but long
+ * timeouts are split into timouts as small as SOCKET_TIMEOUT_QUANTUM.
+ * This reduces the time required to stop the server. */
+#if !defined(SOCKET_TIMEOUT_QUANTUM)
+#define SOCKET_TIMEOUT_QUANTUM (2000) /* in ms */
+#endif
+
+/* Do not try to compress files smaller than this limit. */
+#if !defined(MG_FILE_COMPRESSION_SIZE_LIMIT)
+#define MG_FILE_COMPRESSION_SIZE_LIMIT (1024) /* in bytes */
+#endif
+
+#if !defined(PASSWORDS_FILE_NAME)
+#define PASSWORDS_FILE_NAME ".htpasswd"
+#endif
+
+/* Initial buffer size for all CGI environment variables. In case there is
+ * not enough space, another block is allocated. */
+#if !defined(CGI_ENVIRONMENT_SIZE)
+#define CGI_ENVIRONMENT_SIZE (4096) /* in bytes */
+#endif
+
+/* Maximum number of environment variables. */
+#if !defined(MAX_CGI_ENVIR_VARS)
+#define MAX_CGI_ENVIR_VARS (256) /* in variables (count) */
+#endif
+
+/* General purpose buffer size. */
+#if !defined(MG_BUF_LEN) /* in bytes */
+#define MG_BUF_LEN (1024 * 8)
+#endif
+
+
+/********************************************************************/
+
+/* Helper macros */
+#if !defined(ARRAY_SIZE)
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+#endif
+
+#include <stdint.h>
+
+/* Standard defines */
+#if !defined(INT64_MAX)
+#define INT64_MAX (9223372036854775807)
+#endif
+
+#define SHUTDOWN_RD (0)
+#define SHUTDOWN_WR (1)
+#define SHUTDOWN_BOTH (2)
+
+mg_static_assert(MAX_WORKER_THREADS >= 1,
+ "worker threads must be a positive number");
+
+mg_static_assert(sizeof(size_t) == 4 || sizeof(size_t) == 8,
+ "size_t data type size check");
+
+
+#if defined(_WIN32) /* WINDOWS include block */
+#include <malloc.h> /* *alloc( */
+#include <stdlib.h> /* *alloc( */
+#include <time.h> /* struct timespec */
+#include <windows.h>
+#include <winsock2.h> /* DTL add for SO_EXCLUSIVE */
+#include <ws2tcpip.h>
+
+typedef const char *SOCK_OPT_TYPE;
+
+/* For a detailed description of these *_PATH_MAX defines, see
+ * https://github.com/civetweb/civetweb/issues/937. */
+
+/* UTF8_PATH_MAX is a char buffer size for 259 BMP characters in UTF-8 plus
+ * null termination, rounded up to the next 4 bytes boundary */
+#define UTF8_PATH_MAX (3 * 260)
+/* UTF16_PATH_MAX is the 16-bit wchar_t buffer size required for 259 BMP
+ * characters plus termination. (Note: wchar_t is 16 bit on Windows) */
+#define UTF16_PATH_MAX (260)
+
+#if !defined(_IN_PORT_T)
+#if !defined(in_port_t)
+#define in_port_t u_short
+#endif
+#endif
+
+#if defined(_WIN32_WCE)
+#error "WinCE support has ended"
+#endif
+
+#include <direct.h>
+#include <io.h>
+#include <process.h>
+
+
+#define MAKEUQUAD(lo, hi) \
+ ((uint64_t)(((uint32_t)(lo)) | ((uint64_t)((uint32_t)(hi))) << 32))
+#define RATE_DIFF (10000000) /* 100 nsecs */
+#define EPOCH_DIFF (MAKEUQUAD(0xd53e8000, 0x019db1de))
+#define SYS2UNIX_TIME(lo, hi) \
+ ((time_t)((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF))
+
+/* Visual Studio 6 does not know __func__ or __FUNCTION__
+ * The rest of MS compilers use __FUNCTION__, not C99 __func__
+ * Also use _strtoui64 on modern M$ compilers */
+#if defined(_MSC_VER)
+#if (_MSC_VER < 1300)
+#define STRX(x) #x
+#define STR(x) STRX(x)
+#define __func__ __FILE__ ":" STR(__LINE__)
+#define strtoull(x, y, z) ((unsigned __int64)_atoi64(x))
+#define strtoll(x, y, z) (_atoi64(x))
+#else
+#define __func__ __FUNCTION__
+#define strtoull(x, y, z) (_strtoui64(x, y, z))
+#define strtoll(x, y, z) (_strtoi64(x, y, z))
+#endif
+#endif /* _MSC_VER */
+
+
+#define ERRNO ((int)(GetLastError()))
+#define NO_SOCKLEN_T
+
+
+#if defined(_WIN64) || defined(__MINGW64__)
+#if !defined(SSL_LIB)
+
+#if defined(OPENSSL_API_3_0)
+#define SSL_LIB "libssl-3-x64.dll"
+#define CRYPTO_LIB "libcrypto-3-x64.dll"
+#endif
+
+#if defined(OPENSSL_API_1_1)
+#define SSL_LIB "libssl-1_1-x64.dll"
+#define CRYPTO_LIB "libcrypto-1_1-x64.dll"
+#endif /* OPENSSL_API_1_1 */
+
+#if defined(OPENSSL_API_1_0)
+#define SSL_LIB "ssleay64.dll"
+#define CRYPTO_LIB "libeay64.dll"
+#endif /* OPENSSL_API_1_0 */
+
+#endif
+#else /* defined(_WIN64) || defined(__MINGW64__) */
+#if !defined(SSL_LIB)
+
+#if defined(OPENSSL_API_3_0)
+#define SSL_LIB "libssl-3.dll"
+#define CRYPTO_LIB "libcrypto-3.dll"
+#endif
+
+#if defined(OPENSSL_API_1_1)
+#define SSL_LIB "libssl-1_1.dll"
+#define CRYPTO_LIB "libcrypto-1_1.dll"
+#endif /* OPENSSL_API_1_1 */
+
+#if defined(OPENSSL_API_1_0)
+#define SSL_LIB "ssleay32.dll"
+#define CRYPTO_LIB "libeay32.dll"
+#endif /* OPENSSL_API_1_0 */
+
+#endif /* SSL_LIB */
+#endif /* defined(_WIN64) || defined(__MINGW64__) */
+
+
+#define O_NONBLOCK (0)
+#if !defined(W_OK)
+#define W_OK (2) /* http://msdn.microsoft.com/en-us/library/1w06ktdy.aspx */
+#endif
+#define _POSIX_
+#define INT64_FMT "I64d"
+#define UINT64_FMT "I64u"
+
+#define WINCDECL __cdecl
+#define vsnprintf_impl _vsnprintf
+#define access _access
+#define mg_sleep(x) (Sleep(x))
+
+#define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY)
+#if !defined(popen)
+#define popen(x, y) (_popen(x, y))
+#endif
+#if !defined(pclose)
+#define pclose(x) (_pclose(x))
+#endif
+#define close(x) (_close(x))
+#define dlsym(x, y) (GetProcAddress((HINSTANCE)(x), (y)))
+#define RTLD_LAZY (0)
+#define fseeko(x, y, z) ((_lseeki64(_fileno(x), (y), (z)) == -1) ? -1 : 0)
+#define fdopen(x, y) (_fdopen((x), (y)))
+#define write(x, y, z) (_write((x), (y), (unsigned)z))
+#define read(x, y, z) (_read((x), (y), (unsigned)z))
+#define flockfile(x) ((void)pthread_mutex_lock(&global_log_file_lock))
+#define funlockfile(x) ((void)pthread_mutex_unlock(&global_log_file_lock))
+#define sleep(x) (Sleep((x)*1000))
+#define rmdir(x) (_rmdir(x))
+#if defined(_WIN64) || !defined(__MINGW32__)
+/* Only MinGW 32 bit is missing this function */
+#define timegm(x) (_mkgmtime(x))
+#else
+time_t timegm(struct tm *tm);
+#define NEED_TIMEGM
+#endif
+
+
+#if !defined(fileno)
+#define fileno(x) (_fileno(x))
+#endif /* !fileno MINGW #defines fileno */
+
+typedef struct {
+ CRITICAL_SECTION sec; /* Immovable */
+} pthread_mutex_t;
+typedef DWORD pthread_key_t;
+typedef HANDLE pthread_t;
+typedef struct {
+ pthread_mutex_t threadIdSec;
+ struct mg_workerTLS *waiting_thread; /* The chain of threads */
+} pthread_cond_t;
+
+#if !defined(__clockid_t_defined)
+typedef DWORD clockid_t;
+#endif
+#if !defined(CLOCK_MONOTONIC)
+#define CLOCK_MONOTONIC (1)
+#endif
+#if !defined(CLOCK_REALTIME)
+#define CLOCK_REALTIME (2)
+#endif
+#if !defined(CLOCK_THREAD)
+#define CLOCK_THREAD (3)
+#endif
+#if !defined(CLOCK_PROCESS)
+#define CLOCK_PROCESS (4)
+#endif
+
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1900)
+#define _TIMESPEC_DEFINED
+#endif
+#if !defined(_TIMESPEC_DEFINED)
+struct timespec {
+ time_t tv_sec; /* seconds */
+ long tv_nsec; /* nanoseconds */
+};
+#endif
+
+#if !defined(WIN_PTHREADS_TIME_H)
+#define MUST_IMPLEMENT_CLOCK_GETTIME
+#endif
+
+#if defined(MUST_IMPLEMENT_CLOCK_GETTIME)
+#define clock_gettime mg_clock_gettime
+static int
+clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+ FILETIME ft;
+ ULARGE_INTEGER li, li2;
+ BOOL ok = FALSE;
+ double d;
+ static double perfcnt_per_sec = 0.0;
+ static BOOL initialized = FALSE;
+
+ if (!initialized) {
+ QueryPerformanceFrequency((LARGE_INTEGER *)&li);
+ perfcnt_per_sec = 1.0 / li.QuadPart;
+ initialized = TRUE;
+ }
+
+ if (tp) {
+ memset(tp, 0, sizeof(*tp));
+
+ if (clk_id == CLOCK_REALTIME) {
+
+ /* BEGIN: CLOCK_REALTIME = wall clock (date and time) */
+ GetSystemTimeAsFileTime(&ft);
+ li.LowPart = ft.dwLowDateTime;
+ li.HighPart = ft.dwHighDateTime;
+ li.QuadPart -= 116444736000000000; /* 1.1.1970 in filedate */
+ tp->tv_sec = (time_t)(li.QuadPart / 10000000);
+ tp->tv_nsec = (long)(li.QuadPart % 10000000) * 100;
+ ok = TRUE;
+ /* END: CLOCK_REALTIME */
+
+ } else if (clk_id == CLOCK_MONOTONIC) {
+
+ /* BEGIN: CLOCK_MONOTONIC = stopwatch (time differences) */
+ QueryPerformanceCounter((LARGE_INTEGER *)&li);
+ d = li.QuadPart * perfcnt_per_sec;
+ tp->tv_sec = (time_t)d;
+ d -= (double)tp->tv_sec;
+ tp->tv_nsec = (long)(d * 1.0E9);
+ ok = TRUE;
+ /* END: CLOCK_MONOTONIC */
+
+ } else if (clk_id == CLOCK_THREAD) {
+
+ /* BEGIN: CLOCK_THREAD = CPU usage of thread */
+ FILETIME t_create, t_exit, t_kernel, t_user;
+ if (GetThreadTimes(GetCurrentThread(),
+ &t_create,
+ &t_exit,
+ &t_kernel,
+ &t_user)) {
+ li.LowPart = t_user.dwLowDateTime;
+ li.HighPart = t_user.dwHighDateTime;
+ li2.LowPart = t_kernel.dwLowDateTime;
+ li2.HighPart = t_kernel.dwHighDateTime;
+ li.QuadPart += li2.QuadPart;
+ tp->tv_sec = (time_t)(li.QuadPart / 10000000);
+ tp->tv_nsec = (long)(li.QuadPart % 10000000) * 100;
+ ok = TRUE;
+ }
+ /* END: CLOCK_THREAD */
+
+ } else if (clk_id == CLOCK_PROCESS) {
+
+ /* BEGIN: CLOCK_PROCESS = CPU usage of process */
+ FILETIME t_create, t_exit, t_kernel, t_user;
+ if (GetProcessTimes(GetCurrentProcess(),
+ &t_create,
+ &t_exit,
+ &t_kernel,
+ &t_user)) {
+ li.LowPart = t_user.dwLowDateTime;
+ li.HighPart = t_user.dwHighDateTime;
+ li2.LowPart = t_kernel.dwLowDateTime;
+ li2.HighPart = t_kernel.dwHighDateTime;
+ li.QuadPart += li2.QuadPart;
+ tp->tv_sec = (time_t)(li.QuadPart / 10000000);
+ tp->tv_nsec = (long)(li.QuadPart % 10000000) * 100;
+ ok = TRUE;
+ }
+ /* END: CLOCK_PROCESS */
+
+ } else {
+
+ /* BEGIN: unknown clock */
+ /* ok = FALSE; already set by init */
+ /* END: unknown clock */
+ }
+ }
+
+ return ok ? 0 : -1;
+}
+#endif
+
+
+#define pid_t HANDLE /* MINGW typedefs pid_t to int. Using #define here. */
+
+static int pthread_mutex_lock(pthread_mutex_t *);
+static int pthread_mutex_unlock(pthread_mutex_t *);
+static void path_to_unicode(const struct mg_connection *conn,
+ const char *path,
+ wchar_t *wbuf,
+ size_t wbuf_len);
+
+/* All file operations need to be rewritten to solve #246. */
+
+struct mg_file;
+
+static const char *mg_fgets(char *buf, size_t size, struct mg_file *filep);
+
+
+/* POSIX dirent interface */
+struct dirent {
+ char d_name[UTF8_PATH_MAX];
+};
+
+typedef struct DIR {
+ HANDLE handle;
+ WIN32_FIND_DATAW info;
+ struct dirent result;
+} DIR;
+
+#if defined(HAVE_POLL)
+#define mg_pollfd pollfd
+#else
+struct mg_pollfd {
+ SOCKET fd;
+ short events;
+ short revents;
+};
+#endif
+
+/* Mark required libraries */
+#if defined(_MSC_VER)
+#pragma comment(lib, "Ws2_32.lib")
+#endif
+
+#else /* defined(_WIN32) - WINDOWS vs UNIX include block */
+
+#include <inttypes.h>
+
+/* Linux & co. internally use UTF8 */
+#define UTF8_PATH_MAX (PATH_MAX)
+
+typedef const void *SOCK_OPT_TYPE;
+
+#if defined(ANDROID)
+typedef unsigned short int in_port_t;
+#endif
+
+#if !defined(__ZEPHYR__)
+#include <arpa/inet.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <grp.h>
+#include <limits.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <poll.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/utsname.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#if defined(USE_X_DOM_SOCKET)
+#include <sys/un.h>
+#endif
+#endif
+
+#define vsnprintf_impl vsnprintf
+
+#if !defined(NO_SSL_DL) && !defined(NO_SSL)
+#include <dlfcn.h>
+#endif
+
+#if defined(__MACH__) && defined(__APPLE__)
+#define SSL_LIB "libssl.dylib"
+#define CRYPTO_LIB "libcrypto.dylib"
+#else
+#if !defined(SSL_LIB)
+#define SSL_LIB "libssl.so"
+#endif
+#if !defined(CRYPTO_LIB)
+#define CRYPTO_LIB "libcrypto.so"
+#endif
+#endif
+#if !defined(O_BINARY)
+#define O_BINARY (0)
+#endif /* O_BINARY */
+#define closesocket(a) (close(a))
+#define mg_mkdir(conn, path, mode) (mkdir(path, mode))
+#define mg_remove(conn, x) (remove(x))
+#define mg_sleep(x) (usleep((x)*1000))
+#define mg_opendir(conn, x) (opendir(x))
+#define mg_closedir(x) (closedir(x))
+#define mg_readdir(x) (readdir(x))
+#define ERRNO (errno)
+#define INVALID_SOCKET (-1)
+#define INT64_FMT PRId64
+#define UINT64_FMT PRIu64
+typedef int SOCKET;
+#define WINCDECL
+
+#if defined(__hpux)
+/* HPUX 11 does not have monotonic, fall back to realtime */
+#if !defined(CLOCK_MONOTONIC)
+#define CLOCK_MONOTONIC CLOCK_REALTIME
+#endif
+
+/* HPUX defines socklen_t incorrectly as size_t which is 64bit on
+ * Itanium. Without defining _XOPEN_SOURCE or _XOPEN_SOURCE_EXTENDED
+ * the prototypes use int* rather than socklen_t* which matches the
+ * actual library expectation. When called with the wrong size arg
+ * accept() returns a zero client inet addr and check_acl() always
+ * fails. Since socklen_t is widely used below, just force replace
+ * their typedef with int. - DTL
+ */
+#define socklen_t int
+#endif /* hpux */
+
+#define mg_pollfd pollfd
+
+#endif /* defined(_WIN32) - WINDOWS vs UNIX include block */
+
+/* In case our C library is missing "timegm", provide an implementation */
+#if defined(NEED_TIMEGM)
+static inline int
+is_leap(int y)
+{
+ return (y % 4 == 0 && y % 100 != 0) || y % 400 == 0;
+}
+
+static inline int
+count_leap(int y)
+{
+ return (y - 1969) / 4 - (y - 1901) / 100 + (y - 1601) / 400;
+}
+
+time_t
+timegm(struct tm *tm)
+{
+ static const unsigned short ydays[] = {
+ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
+ int year = tm->tm_year + 1900;
+ int mon = tm->tm_mon;
+ int mday = tm->tm_mday - 1;
+ int hour = tm->tm_hour;
+ int min = tm->tm_min;
+ int sec = tm->tm_sec;
+
+ if (year < 1970 || mon < 0 || mon > 11 || mday < 0
+ || (mday >= ydays[mon + 1] - ydays[mon]
+ + (mon == 1 && is_leap(year) ? 1 : 0))
+ || hour < 0 || hour > 23 || min < 0 || min > 59 || sec < 0 || sec > 60)
+ return -1;
+
+ time_t res = year - 1970;
+ res *= 365;
+ res += mday;
+ res += ydays[mon] + (mon > 1 && is_leap(year) ? 1 : 0);
+ res += count_leap(year);
+
+ res *= 24;
+ res += hour;
+ res *= 60;
+ res += min;
+ res *= 60;
+ res += sec;
+ return res;
+}
+#endif /* NEED_TIMEGM */
+
+
+/* va_copy should always be a macro, C99 and C++11 - DTL */
+#if !defined(va_copy)
+#define va_copy(x, y) ((x) = (y))
+#endif
+
+
+#if defined(_WIN32)
+/* Create substitutes for POSIX functions in Win32. */
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
+
+static pthread_mutex_t global_log_file_lock;
+
+FUNCTION_MAY_BE_UNUSED
+static DWORD
+pthread_self(void)
+{
+ return GetCurrentThreadId();
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_key_create(
+ pthread_key_t *key,
+ void (*_ignored)(void *) /* destructor not supported for Windows */
+)
+{
+ (void)_ignored;
+
+ if ((key != 0)) {
+ *key = TlsAlloc();
+ return (*key != TLS_OUT_OF_INDEXES) ? 0 : -1;
+ }
+ return -2;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_key_delete(pthread_key_t key)
+{
+ return TlsFree(key) ? 0 : 1;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_setspecific(pthread_key_t key, void *value)
+{
+ return TlsSetValue(key, value) ? 0 : 1;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static void *
+pthread_getspecific(pthread_key_t key)
+{
+ return TlsGetValue(key);
+}
+
+#if defined(GCC_DIAGNOSTIC)
+/* Enable unused function warning again */
+#pragma GCC diagnostic pop
+#endif
+
+static struct pthread_mutex_undefined_struct *pthread_mutex_attr = NULL;
+#else
+static pthread_mutexattr_t pthread_mutex_attr;
+#endif /* _WIN32 */
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif /* defined(GCC_DIAGNOSTIC) */
+#if defined(__clang__)
+/* Show no warning in case system functions are not used. */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-function"
+#endif
+
+static pthread_mutex_t global_lock_mutex;
+
+
+FUNCTION_MAY_BE_UNUSED
+static void
+mg_global_lock(void)
+{
+ (void)pthread_mutex_lock(&global_lock_mutex);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static void
+mg_global_unlock(void)
+{
+ (void)pthread_mutex_unlock(&global_lock_mutex);
+}
+
+
+#if defined(_WIN64)
+mg_static_assert(SIZE_MAX == 0xFFFFFFFFFFFFFFFFu, "Mismatch for atomic types");
+#elif defined(_WIN32)
+mg_static_assert(SIZE_MAX == 0xFFFFFFFFu, "Mismatch for atomic types");
+#endif
+
+
+/* Atomic functions working on ptrdiff_t ("signed size_t").
+ * Operations: Increment, Decrement, Add, Maximum.
+ * Up to size_t, they do not an atomic "load" operation.
+ */
+FUNCTION_MAY_BE_UNUSED
+static ptrdiff_t
+mg_atomic_inc(volatile ptrdiff_t *addr)
+{
+ ptrdiff_t ret;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ ret = InterlockedIncrement64(addr);
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ ret = InterlockedIncrement(addr);
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ ret = __sync_add_and_fetch(addr, 1);
+#else
+ mg_global_lock();
+ ret = (++(*addr));
+ mg_global_unlock();
+#endif
+ return ret;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static ptrdiff_t
+mg_atomic_dec(volatile ptrdiff_t *addr)
+{
+ ptrdiff_t ret;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ ret = InterlockedDecrement64(addr);
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ ret = InterlockedDecrement(addr);
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ ret = __sync_sub_and_fetch(addr, 1);
+#else
+ mg_global_lock();
+ ret = (--(*addr));
+ mg_global_unlock();
+#endif
+ return ret;
+}
+
+
+#if defined(USE_SERVER_STATS) || defined(STOP_FLAG_NEEDS_LOCK)
+static ptrdiff_t
+mg_atomic_add(volatile ptrdiff_t *addr, ptrdiff_t value)
+{
+ ptrdiff_t ret;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ ret = InterlockedAdd64(addr, value);
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ ret = InterlockedExchangeAdd(addr, value) + value;
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ ret = __sync_add_and_fetch(addr, value);
+#else
+ mg_global_lock();
+ *addr += value;
+ ret = (*addr);
+ mg_global_unlock();
+#endif
+ return ret;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static ptrdiff_t
+mg_atomic_compare_and_swap(volatile ptrdiff_t *addr,
+ ptrdiff_t oldval,
+ ptrdiff_t newval)
+{
+ ptrdiff_t ret;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ ret = InterlockedCompareExchange64(addr, newval, oldval);
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ ret = InterlockedCompareExchange(addr, newval, oldval);
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ ret = __sync_val_compare_and_swap(addr, oldval, newval);
+#else
+ mg_global_lock();
+ ret = *addr;
+ if ((ret != newval) && (ret == oldval)) {
+ *addr = newval;
+ }
+ mg_global_unlock();
+#endif
+ return ret;
+}
+
+
+static void
+mg_atomic_max(volatile ptrdiff_t *addr, ptrdiff_t value)
+{
+ register ptrdiff_t tmp = *addr;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ while (tmp < value) {
+ tmp = InterlockedCompareExchange64(addr, value, tmp);
+ }
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ while (tmp < value) {
+ tmp = InterlockedCompareExchange(addr, value, tmp);
+ }
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ while (tmp < value) {
+ tmp = __sync_val_compare_and_swap(addr, tmp, value);
+ }
+#else
+ mg_global_lock();
+ if (*addr < value) {
+ *addr = value;
+ }
+ mg_global_unlock();
+#endif
+}
+
+
+static int64_t
+mg_atomic_add64(volatile int64_t *addr, int64_t value)
+{
+ int64_t ret;
+
+#if defined(_WIN64) && !defined(NO_ATOMICS)
+ ret = InterlockedAdd64(addr, value);
+#elif defined(_WIN32) && !defined(NO_ATOMICS)
+ ret = InterlockedExchangeAdd64(addr, value) + value;
+#elif defined(__GNUC__) \
+ && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0))) \
+ && !defined(NO_ATOMICS)
+ ret = __sync_add_and_fetch(addr, value);
+#else
+ mg_global_lock();
+ *addr += value;
+ ret = (*addr);
+ mg_global_unlock();
+#endif
+ return ret;
+}
+#endif
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic pop
+#endif /* defined(GCC_DIAGNOSTIC) */
+#if defined(__clang__)
+/* Show no warning in case system functions are not used. */
+#pragma clang diagnostic pop
+#endif
+
+
+#if defined(USE_SERVER_STATS)
+
+struct mg_memory_stat {
+ volatile ptrdiff_t totalMemUsed;
+ volatile ptrdiff_t maxMemUsed;
+ volatile ptrdiff_t blockCount;
+};
+
+
+static struct mg_memory_stat *get_memory_stat(struct mg_context *ctx);
+
+
+static void *
+mg_malloc_ex(size_t size,
+ struct mg_context *ctx,
+ const char *file,
+ unsigned line)
+{
+ void *data = malloc(size + 2 * sizeof(uintptr_t));
+ void *memory = 0;
+ struct mg_memory_stat *mstat = get_memory_stat(ctx);
+
+#if defined(MEMORY_DEBUGGING)
+ char mallocStr[256];
+#else
+ (void)file;
+ (void)line;
+#endif
+
+ if (data) {
+ ptrdiff_t mmem = mg_atomic_add(&mstat->totalMemUsed, (ptrdiff_t)size);
+ mg_atomic_max(&mstat->maxMemUsed, mmem);
+
+ mg_atomic_inc(&mstat->blockCount);
+ ((uintptr_t *)data)[0] = size;
+ ((uintptr_t *)data)[1] = (uintptr_t)mstat;
+ memory = (void *)(((char *)data) + 2 * sizeof(uintptr_t));
+ }
+
+#if defined(MEMORY_DEBUGGING)
+ sprintf(mallocStr,
+ "MEM: %p %5lu alloc %7lu %4lu --- %s:%u\n",
+ memory,
+ (unsigned long)size,
+ (unsigned long)mstat->totalMemUsed,
+ (unsigned long)mstat->blockCount,
+ file,
+ line);
+ DEBUG_TRACE("%s", mallocStr);
+#endif
+
+ return memory;
+}
+
+
+static void *
+mg_calloc_ex(size_t count,
+ size_t size,
+ struct mg_context *ctx,
+ const char *file,
+ unsigned line)
+{
+ void *data = mg_malloc_ex(size * count, ctx, file, line);
+
+ if (data) {
+ memset(data, 0, size * count);
+ }
+ return data;
+}
+
+
+static void
+mg_free_ex(void *memory, const char *file, unsigned line)
+{
+#if defined(MEMORY_DEBUGGING)
+ char mallocStr[256];
+#else
+ (void)file;
+ (void)line;
+#endif
+
+ if (memory) {
+ void *data = (void *)(((char *)memory) - 2 * sizeof(uintptr_t));
+ uintptr_t size = ((uintptr_t *)data)[0];
+ struct mg_memory_stat *mstat =
+ (struct mg_memory_stat *)(((uintptr_t *)data)[1]);
+ mg_atomic_add(&mstat->totalMemUsed, -(ptrdiff_t)size);
+ mg_atomic_dec(&mstat->blockCount);
+
+#if defined(MEMORY_DEBUGGING)
+ sprintf(mallocStr,
+ "MEM: %p %5lu free %7lu %4lu --- %s:%u\n",
+ memory,
+ (unsigned long)size,
+ (unsigned long)mstat->totalMemUsed,
+ (unsigned long)mstat->blockCount,
+ file,
+ line);
+ DEBUG_TRACE("%s", mallocStr);
+#endif
+ free(data);
+ }
+}
+
+
+static void *
+mg_realloc_ex(void *memory,
+ size_t newsize,
+ struct mg_context *ctx,
+ const char *file,
+ unsigned line)
+{
+ void *data;
+ void *_realloc;
+ uintptr_t oldsize;
+
+#if defined(MEMORY_DEBUGGING)
+ char mallocStr[256];
+#else
+ (void)file;
+ (void)line;
+#endif
+
+ if (newsize) {
+ if (memory) {
+ /* Reallocate existing block */
+ struct mg_memory_stat *mstat;
+ data = (void *)(((char *)memory) - 2 * sizeof(uintptr_t));
+ oldsize = ((uintptr_t *)data)[0];
+ mstat = (struct mg_memory_stat *)((uintptr_t *)data)[1];
+ _realloc = realloc(data, newsize + 2 * sizeof(uintptr_t));
+ if (_realloc) {
+ data = _realloc;
+ mg_atomic_add(&mstat->totalMemUsed, -(ptrdiff_t)oldsize);
+#if defined(MEMORY_DEBUGGING)
+ sprintf(mallocStr,
+ "MEM: %p %5lu r-free %7lu %4lu --- %s:%u\n",
+ memory,
+ (unsigned long)oldsize,
+ (unsigned long)mstat->totalMemUsed,
+ (unsigned long)mstat->blockCount,
+ file,
+ line);
+ DEBUG_TRACE("%s", mallocStr);
+#endif
+ mg_atomic_add(&mstat->totalMemUsed, (ptrdiff_t)newsize);
+
+#if defined(MEMORY_DEBUGGING)
+ sprintf(mallocStr,
+ "MEM: %p %5lu r-alloc %7lu %4lu --- %s:%u\n",
+ memory,
+ (unsigned long)newsize,
+ (unsigned long)mstat->totalMemUsed,
+ (unsigned long)mstat->blockCount,
+ file,
+ line);
+ DEBUG_TRACE("%s", mallocStr);
+#endif
+ *(uintptr_t *)data = newsize;
+ data = (void *)(((char *)data) + 2 * sizeof(uintptr_t));
+ } else {
+#if defined(MEMORY_DEBUGGING)
+ DEBUG_TRACE("%s", "MEM: realloc failed\n");
+#endif
+ return _realloc;
+ }
+ } else {
+ /* Allocate new block */
+ data = mg_malloc_ex(newsize, ctx, file, line);
+ }
+ } else {
+ /* Free existing block */
+ data = 0;
+ mg_free_ex(memory, file, line);
+ }
+
+ return data;
+}
+
+
+#define mg_malloc(a) mg_malloc_ex(a, NULL, __FILE__, __LINE__)
+#define mg_calloc(a, b) mg_calloc_ex(a, b, NULL, __FILE__, __LINE__)
+#define mg_realloc(a, b) mg_realloc_ex(a, b, NULL, __FILE__, __LINE__)
+#define mg_free(a) mg_free_ex(a, __FILE__, __LINE__)
+
+#define mg_malloc_ctx(a, c) mg_malloc_ex(a, c, __FILE__, __LINE__)
+#define mg_calloc_ctx(a, b, c) mg_calloc_ex(a, b, c, __FILE__, __LINE__)
+#define mg_realloc_ctx(a, b, c) mg_realloc_ex(a, b, c, __FILE__, __LINE__)
+
+
+#else /* USE_SERVER_STATS */
+
+
+static __inline void *
+mg_malloc(size_t a)
+{
+ return malloc(a);
+}
+
+static __inline void *
+mg_calloc(size_t a, size_t b)
+{
+ return calloc(a, b);
+}
+
+static __inline void *
+mg_realloc(void *a, size_t b)
+{
+ return realloc(a, b);
+}
+
+static __inline void
+mg_free(void *a)
+{
+ free(a);
+}
+
+#define mg_malloc_ctx(a, c) mg_malloc(a)
+#define mg_calloc_ctx(a, b, c) mg_calloc(a, b)
+#define mg_realloc_ctx(a, b, c) mg_realloc(a, b)
+#define mg_free_ctx(a, c) mg_free(a)
+
+#endif /* USE_SERVER_STATS */
+
+
+static void mg_vsnprintf(const struct mg_connection *conn,
+ int *truncated,
+ char *buf,
+ size_t buflen,
+ const char *fmt,
+ va_list ap);
+
+static void mg_snprintf(const struct mg_connection *conn,
+ int *truncated,
+ char *buf,
+ size_t buflen,
+ PRINTF_FORMAT_STRING(const char *fmt),
+ ...) PRINTF_ARGS(5, 6);
+
+/* This following lines are just meant as a reminder to use the mg-functions
+ * for memory management */
+#if defined(malloc)
+#undef malloc
+#endif
+#if defined(calloc)
+#undef calloc
+#endif
+#if defined(realloc)
+#undef realloc
+#endif
+#if defined(free)
+#undef free
+#endif
+#if defined(snprintf)
+#undef snprintf
+#endif
+#if defined(vsnprintf)
+#undef vsnprintf
+#endif
+#define malloc DO_NOT_USE_THIS_FUNCTION__USE_mg_malloc
+#define calloc DO_NOT_USE_THIS_FUNCTION__USE_mg_calloc
+#define realloc DO_NOT_USE_THIS_FUNCTION__USE_mg_realloc
+#define free DO_NOT_USE_THIS_FUNCTION__USE_mg_free
+#define snprintf DO_NOT_USE_THIS_FUNCTION__USE_mg_snprintf
+#if defined(_WIN32)
+/* vsnprintf must not be used in any system,
+ * but this define only works well for Windows. */
+#define vsnprintf DO_NOT_USE_THIS_FUNCTION__USE_mg_vsnprintf
+#endif
+
+
+/* mg_init_library counter */
+static int mg_init_library_called = 0;
+
+#if !defined(NO_SSL)
+#if defined(OPENSSL_API_1_0) || defined(OPENSSL_API_1_1) \
+ || defined(OPENSSL_API_3_0)
+static int mg_openssl_initialized = 0;
+#endif
+#if !defined(OPENSSL_API_1_0) && !defined(OPENSSL_API_1_1) \
+ && !defined(OPENSSL_API_3_0) && !defined(USE_MBEDTLS)
+#error "Please define OPENSSL_API_#_# or USE_MBEDTLS"
+#endif
+#if defined(OPENSSL_API_1_0) && defined(OPENSSL_API_1_1)
+#error "Multiple OPENSSL_API versions defined"
+#endif
+#if defined(OPENSSL_API_1_1) && defined(OPENSSL_API_3_0)
+#error "Multiple OPENSSL_API versions defined"
+#endif
+#if defined(OPENSSL_API_1_0) && defined(OPENSSL_API_3_0)
+#error "Multiple OPENSSL_API versions defined"
+#endif
+#if (defined(OPENSSL_API_1_0) || defined(OPENSSL_API_1_1) \
+ || defined(OPENSSL_API_3_0)) \
+ && defined(USE_MBEDTLS)
+#error "Multiple SSL libraries defined"
+#endif
+#endif
+
+
+static pthread_key_t sTlsKey; /* Thread local storage index */
+static volatile ptrdiff_t thread_idx_max = 0;
+
+#if defined(MG_LEGACY_INTERFACE)
+#define MG_ALLOW_USING_GET_REQUEST_INFO_FOR_RESPONSE
+#endif
+
+struct mg_workerTLS {
+ int is_master;
+ unsigned long thread_idx;
+ void *user_ptr;
+#if defined(_WIN32)
+ HANDLE pthread_cond_helper_mutex;
+ struct mg_workerTLS *next_waiting_thread;
+#endif
+ const char *alpn_proto;
+#if defined(MG_ALLOW_USING_GET_REQUEST_INFO_FOR_RESPONSE)
+ char txtbuf[4];
+#endif
+};
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif /* defined(GCC_DIAGNOSTIC) */
+#if defined(__clang__)
+/* Show no warning in case system functions are not used. */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-function"
+#endif
+
+
+/* Get a unique thread ID as unsigned long, independent from the data type
+ * of thread IDs defined by the operating system API.
+ * If two calls to mg_current_thread_id return the same value, they calls
+ * are done from the same thread. If they return different values, they are
+ * done from different threads. (Provided this function is used in the same
+ * process context and threads are not repeatedly created and deleted, but
+ * CivetWeb does not do that).
+ * This function must match the signature required for SSL id callbacks:
+ * CRYPTO_set_id_callback
+ */
+FUNCTION_MAY_BE_UNUSED
+static unsigned long
+mg_current_thread_id(void)
+{
+#if defined(_WIN32)
+ return GetCurrentThreadId();
+#else
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunreachable-code"
+ /* For every compiler, either "sizeof(pthread_t) > sizeof(unsigned long)"
+ * or not, so one of the two conditions will be unreachable by construction.
+ * Unfortunately the C standard does not define a way to check this at
+ * compile time, since the #if preprocessor conditions can not use the
+ * sizeof operator as an argument. */
+#endif
+
+ if (sizeof(pthread_t) > sizeof(unsigned long)) {
+ /* This is the problematic case for CRYPTO_set_id_callback:
+ * The OS pthread_t can not be cast to unsigned long. */
+ struct mg_workerTLS *tls =
+ (struct mg_workerTLS *)pthread_getspecific(sTlsKey);
+ if (tls == NULL) {
+ /* SSL called from an unknown thread: Create some thread index.
+ */
+ tls = (struct mg_workerTLS *)mg_malloc(sizeof(struct mg_workerTLS));
+ tls->is_master = -2; /* -2 means "3rd party thread" */
+ tls->thread_idx = (unsigned)mg_atomic_inc(&thread_idx_max);
+ pthread_setspecific(sTlsKey, tls);
+ }
+ return tls->thread_idx;
+ } else {
+ /* pthread_t may be any data type, so a simple cast to unsigned long
+ * can rise a warning/error, depending on the platform.
+ * Here memcpy is used as an anything-to-anything cast. */
+ unsigned long ret = 0;
+ pthread_t t = pthread_self();
+ memcpy(&ret, &t, sizeof(pthread_t));
+ return ret;
+ }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+#endif
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static uint64_t
+mg_get_current_time_ns(void)
+{
+ struct timespec tsnow;
+ clock_gettime(CLOCK_REALTIME, &tsnow);
+ return (((uint64_t)tsnow.tv_sec) * 1000000000) + (uint64_t)tsnow.tv_nsec;
+}
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic pop
+#endif /* defined(GCC_DIAGNOSTIC) */
+#if defined(__clang__)
+/* Show no warning in case system functions are not used. */
+#pragma clang diagnostic pop
+#endif
+
+
+#if defined(NEED_DEBUG_TRACE_FUNC)
+static void
+DEBUG_TRACE_FUNC(const char *func, unsigned line, const char *fmt, ...)
+{
+ va_list args;
+ struct timespec tsnow;
+
+ /* Get some operating system independent thread id */
+ unsigned long thread_id = mg_current_thread_id();
+
+ clock_gettime(CLOCK_REALTIME, &tsnow);
+
+ flockfile(DEBUG_TRACE_STREAM);
+ fprintf(DEBUG_TRACE_STREAM,
+ "*** %lu.%09lu %lu %s:%u: ",
+ (unsigned long)tsnow.tv_sec,
+ (unsigned long)tsnow.tv_nsec,
+ thread_id,
+ func,
+ line);
+ va_start(args, fmt);
+ vfprintf(DEBUG_TRACE_STREAM, fmt, args);
+ va_end(args);
+ putc('\n', DEBUG_TRACE_STREAM);
+ fflush(DEBUG_TRACE_STREAM);
+ funlockfile(DEBUG_TRACE_STREAM);
+}
+#endif /* NEED_DEBUG_TRACE_FUNC */
+
+
+#define MD5_STATIC static
+#include "md5.inl"
+
+/* Darwin prior to 7.0 and Win32 do not have socklen_t */
+#if defined(NO_SOCKLEN_T)
+typedef int socklen_t;
+#endif /* NO_SOCKLEN_T */
+
+#define IP_ADDR_STR_LEN (50) /* IPv6 hex string is 46 chars */
+
+#if !defined(MSG_NOSIGNAL)
+#define MSG_NOSIGNAL (0)
+#endif
+
+
+/* SSL: mbedTLS vs. no-ssl vs. OpenSSL */
+#if defined(USE_MBEDTLS)
+/* mbedTLS */
+#include "mod_mbedtls.inl"
+
+#elif defined(NO_SSL)
+/* no SSL */
+typedef struct SSL SSL; /* dummy for SSL argument to push/pull */
+typedef struct SSL_CTX SSL_CTX;
+
+#elif defined(NO_SSL_DL)
+/* OpenSSL without dynamic loading */
+#include <openssl/bn.h>
+#include <openssl/conf.h>
+#include <openssl/crypto.h>
+#include <openssl/dh.h>
+#include <openssl/engine.h>
+#include <openssl/err.h>
+#include <openssl/opensslv.h>
+#include <openssl/pem.h>
+#include <openssl/ssl.h>
+#include <openssl/tls1.h>
+#include <openssl/x509.h>
+
+#if defined(WOLFSSL_VERSION)
+/* Additional defines for WolfSSL, see
+ * https://github.com/civetweb/civetweb/issues/583 */
+#include "wolfssl_extras.inl"
+#endif
+
+#if defined(OPENSSL_IS_BORINGSSL)
+/* From boringssl/src/include/openssl/mem.h:
+ *
+ * OpenSSL has, historically, had a complex set of malloc debugging options.
+ * However, that was written in a time before Valgrind and ASAN. Since we now
+ * have those tools, the OpenSSL allocation functions are simply macros around
+ * the standard memory functions.
+ *
+ * #define OPENSSL_free free */
+#define free free
+// disable for boringssl
+#define CONF_modules_unload(a) ((void)0)
+#define ENGINE_cleanup() ((void)0)
+#endif
+
+/* If OpenSSL headers are included, automatically select the API version */
+#if (OPENSSL_VERSION_NUMBER >= 0x30000000L)
+#if !defined(OPENSSL_API_3_0)
+#define OPENSSL_API_3_0
+#endif
+#define OPENSSL_REMOVE_THREAD_STATE()
+#else
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
+#if !defined(OPENSSL_API_1_1)
+#define OPENSSL_API_1_1
+#endif
+#define OPENSSL_REMOVE_THREAD_STATE()
+#else
+#if !defined(OPENSSL_API_1_0)
+#define OPENSSL_API_1_0
+#endif
+#define OPENSSL_REMOVE_THREAD_STATE() ERR_remove_thread_state(NULL)
+#endif
+#endif
+
+
+#else
+/* SSL loaded dynamically from DLL / shared object */
+/* Add all prototypes here, to be independent from OpenSSL source
+ * installation. */
+#include "openssl_dl.inl"
+
+#endif /* Various SSL bindings */
+
+
+#if !defined(NO_CACHING)
+static const char month_names[][4] = {"Jan",
+ "Feb",
+ "Mar",
+ "Apr",
+ "May",
+ "Jun",
+ "Jul",
+ "Aug",
+ "Sep",
+ "Oct",
+ "Nov",
+ "Dec"};
+#endif /* !NO_CACHING */
+
+
+/* Unified socket address. For IPv6 support, add IPv6 address structure in
+ * the union u. */
+union usa {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+#if defined(USE_IPV6)
+ struct sockaddr_in6 sin6;
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ struct sockaddr_un sun;
+#endif
+};
+
+#if defined(USE_X_DOM_SOCKET)
+static unsigned short
+USA_IN_PORT_UNSAFE(union usa *s)
+{
+ if (s->sa.sa_family == AF_INET)
+ return s->sin.sin_port;
+#if defined(USE_IPV6)
+ if (s->sa.sa_family == AF_INET6)
+ return s->sin6.sin6_port;
+#endif
+ return 0;
+}
+#endif
+#if defined(USE_IPV6)
+#define USA_IN_PORT_UNSAFE(s) \
+ (((s)->sa.sa_family == AF_INET6) ? (s)->sin6.sin6_port : (s)->sin.sin_port)
+#else
+#define USA_IN_PORT_UNSAFE(s) ((s)->sin.sin_port)
+#endif
+
+/* Describes a string (chunk of memory). */
+struct vec {
+ const char *ptr;
+ size_t len;
+};
+
+struct mg_file_stat {
+ /* File properties filled by mg_stat: */
+ uint64_t size;
+ time_t last_modified;
+ int is_directory; /* Set to 1 if mg_stat is called for a directory */
+ int is_gzipped; /* Set to 1 if the content is gzipped, in which
+ * case we need a "Content-Eencoding: gzip" header */
+ int location; /* 0 = nowhere, 1 = on disk, 2 = in memory */
+};
+
+
+struct mg_file_access {
+ /* File properties filled by mg_fopen: */
+ FILE *fp;
+};
+
+struct mg_file {
+ struct mg_file_stat stat;
+ struct mg_file_access access;
+};
+
+
+#define STRUCT_FILE_INITIALIZER \
+ { \
+ {(uint64_t)0, (time_t)0, 0, 0, 0}, \
+ { \
+ (FILE *)NULL \
+ } \
+ }
+
+
+/* Describes listening socket, or socket which was accept()-ed by the master
+ * thread and queued for future handling by the worker thread. */
+struct socket {
+ SOCKET sock; /* Listening socket */
+ union usa lsa; /* Local socket address */
+ union usa rsa; /* Remote socket address */
+ unsigned char is_ssl; /* Is port SSL-ed */
+ unsigned char ssl_redir; /* Is port supposed to redirect everything to SSL
+ * port */
+ unsigned char in_use; /* 0: invalid, 1: valid, 2: free */
+};
+
+
+/* Enum const for all options must be in sync with
+ * static struct mg_option config_options[]
+ * This is tested in the unit test (test/private.c)
+ * "Private Config Options"
+ */
+enum {
+ /* Once for each server */
+ LISTENING_PORTS,
+ NUM_THREADS,
+ RUN_AS_USER,
+ CONFIG_TCP_NODELAY, /* Prepended CONFIG_ to avoid conflict with the
+ * socket option typedef TCP_NODELAY. */
+ MAX_REQUEST_SIZE,
+ LINGER_TIMEOUT,
+ CONNECTION_QUEUE_SIZE,
+ LISTEN_BACKLOG_SIZE,
+#if defined(__linux__)
+ ALLOW_SENDFILE_CALL,
+#endif
+#if defined(_WIN32)
+ CASE_SENSITIVE_FILES,
+#endif
+ THROTTLE,
+ ENABLE_KEEP_ALIVE,
+ REQUEST_TIMEOUT,
+ KEEP_ALIVE_TIMEOUT,
+#if defined(USE_WEBSOCKET)
+ WEBSOCKET_TIMEOUT,
+ ENABLE_WEBSOCKET_PING_PONG,
+#endif
+ DECODE_URL,
+ DECODE_QUERY_STRING,
+#if defined(USE_LUA)
+ LUA_BACKGROUND_SCRIPT,
+ LUA_BACKGROUND_SCRIPT_PARAMS,
+#endif
+#if defined(USE_HTTP2)
+ ENABLE_HTTP2,
+#endif
+
+ /* Once for each domain */
+ DOCUMENT_ROOT,
+
+ ACCESS_LOG_FILE,
+ ERROR_LOG_FILE,
+
+ CGI_EXTENSIONS,
+ CGI_ENVIRONMENT,
+ CGI_INTERPRETER,
+ CGI_INTERPRETER_ARGS,
+#if defined(USE_TIMERS)
+ CGI_TIMEOUT,
+#endif
+ CGI_BUFFERING,
+
+ CGI2_EXTENSIONS,
+ CGI2_ENVIRONMENT,
+ CGI2_INTERPRETER,
+ CGI2_INTERPRETER_ARGS,
+#if defined(USE_TIMERS)
+ CGI2_TIMEOUT,
+#endif
+ CGI2_BUFFERING,
+
+#if defined(USE_4_CGI)
+ CGI3_EXTENSIONS,
+ CGI3_ENVIRONMENT,
+ CGI3_INTERPRETER,
+ CGI3_INTERPRETER_ARGS,
+#if defined(USE_TIMERS)
+ CGI3_TIMEOUT,
+#endif
+ CGI3_BUFFERING,
+
+ CGI4_EXTENSIONS,
+ CGI4_ENVIRONMENT,
+ CGI4_INTERPRETER,
+ CGI4_INTERPRETER_ARGS,
+#if defined(USE_TIMERS)
+ CGI4_TIMEOUT,
+#endif
+ CGI4_BUFFERING,
+#endif
+
+ PUT_DELETE_PASSWORDS_FILE, /* must follow CGI_* */
+ PROTECT_URI,
+ AUTHENTICATION_DOMAIN,
+ ENABLE_AUTH_DOMAIN_CHECK,
+ SSI_EXTENSIONS,
+ ENABLE_DIRECTORY_LISTING,
+ ENABLE_WEBDAV,
+ GLOBAL_PASSWORDS_FILE,
+ INDEX_FILES,
+ ACCESS_CONTROL_LIST,
+ EXTRA_MIME_TYPES,
+ SSL_CERTIFICATE,
+ SSL_CERTIFICATE_CHAIN,
+ URL_REWRITE_PATTERN,
+ HIDE_FILES,
+ SSL_DO_VERIFY_PEER,
+ SSL_CACHE_TIMEOUT,
+ SSL_CA_PATH,
+ SSL_CA_FILE,
+ SSL_VERIFY_DEPTH,
+ SSL_DEFAULT_VERIFY_PATHS,
+ SSL_CIPHER_LIST,
+ SSL_PROTOCOL_VERSION,
+ SSL_SHORT_TRUST,
+
+#if defined(USE_LUA)
+ LUA_PRELOAD_FILE,
+ LUA_SCRIPT_EXTENSIONS,
+ LUA_SERVER_PAGE_EXTENSIONS,
+#if defined(MG_EXPERIMENTAL_INTERFACES)
+ LUA_DEBUG_PARAMS,
+#endif
+#endif
+#if defined(USE_DUKTAPE)
+ DUKTAPE_SCRIPT_EXTENSIONS,
+#endif
+
+#if defined(USE_WEBSOCKET)
+ WEBSOCKET_ROOT,
+#endif
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ LUA_WEBSOCKET_EXTENSIONS,
+#endif
+
+ ACCESS_CONTROL_ALLOW_ORIGIN,
+ ACCESS_CONTROL_ALLOW_METHODS,
+ ACCESS_CONTROL_ALLOW_HEADERS,
+ ERROR_PAGES,
+#if !defined(NO_CACHING)
+ STATIC_FILE_MAX_AGE,
+ STATIC_FILE_CACHE_CONTROL,
+#endif
+#if !defined(NO_SSL)
+ STRICT_HTTPS_MAX_AGE,
+#endif
+ ADDITIONAL_HEADER,
+ ALLOW_INDEX_SCRIPT_SUB_RES,
+
+ NUM_OPTIONS
+};
+
+
+/* Config option name, config types, default value.
+ * Must be in the same order as the enum const above.
+ */
+static const struct mg_option config_options[] = {
+
+ /* Once for each server */
+ {"listening_ports", MG_CONFIG_TYPE_STRING_LIST, "8080"},
+ {"num_threads", MG_CONFIG_TYPE_NUMBER, "50"},
+ {"run_as_user", MG_CONFIG_TYPE_STRING, NULL},
+ {"tcp_nodelay", MG_CONFIG_TYPE_NUMBER, "0"},
+ {"max_request_size", MG_CONFIG_TYPE_NUMBER, "16384"},
+ {"linger_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+ {"connection_queue", MG_CONFIG_TYPE_NUMBER, "20"},
+ {"listen_backlog", MG_CONFIG_TYPE_NUMBER, "200"},
+#if defined(__linux__)
+ {"allow_sendfile_call", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+#endif
+#if defined(_WIN32)
+ {"case_sensitive", MG_CONFIG_TYPE_BOOLEAN, "no"},
+#endif
+ {"throttle", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"enable_keep_alive", MG_CONFIG_TYPE_BOOLEAN, "no"},
+ {"request_timeout_ms", MG_CONFIG_TYPE_NUMBER, "30000"},
+ {"keep_alive_timeout_ms", MG_CONFIG_TYPE_NUMBER, "500"},
+#if defined(USE_WEBSOCKET)
+ {"websocket_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+ {"enable_websocket_ping_pong", MG_CONFIG_TYPE_BOOLEAN, "no"},
+#endif
+ {"decode_url", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+ {"decode_query_string", MG_CONFIG_TYPE_BOOLEAN, "no"},
+#if defined(USE_LUA)
+ {"lua_background_script", MG_CONFIG_TYPE_FILE, NULL},
+ {"lua_background_script_params", MG_CONFIG_TYPE_STRING_LIST, NULL},
+#endif
+#if defined(USE_HTTP2)
+ {"enable_http2", MG_CONFIG_TYPE_BOOLEAN, "no"},
+#endif
+
+ /* Once for each domain */
+ {"document_root", MG_CONFIG_TYPE_DIRECTORY, NULL},
+
+ {"access_log_file", MG_CONFIG_TYPE_FILE, NULL},
+ {"error_log_file", MG_CONFIG_TYPE_FILE, NULL},
+
+ {"cgi_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.cgi$|**.pl$|**.php$"},
+ {"cgi_environment", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"cgi_interpreter", MG_CONFIG_TYPE_FILE, NULL},
+ {"cgi_interpreter_args", MG_CONFIG_TYPE_STRING, NULL},
+#if defined(USE_TIMERS)
+ {"cgi_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+#endif
+ {"cgi_buffering", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+
+ {"cgi2_pattern", MG_CONFIG_TYPE_EXT_PATTERN, NULL},
+ {"cgi2_environment", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"cgi2_interpreter", MG_CONFIG_TYPE_FILE, NULL},
+ {"cgi2_interpreter_args", MG_CONFIG_TYPE_STRING, NULL},
+#if defined(USE_TIMERS)
+ {"cgi2_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+#endif
+ {"cgi2_buffering", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+
+#if defined(USE_4_CGI)
+ {"cgi3_pattern", MG_CONFIG_TYPE_EXT_PATTERN, NULL},
+ {"cgi3_environment", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"cgi3_interpreter", MG_CONFIG_TYPE_FILE, NULL},
+ {"cgi3_interpreter_args", MG_CONFIG_TYPE_STRING, NULL},
+#if defined(USE_TIMERS)
+ {"cgi3_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+#endif
+ {"cgi3_buffering", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+
+ {"cgi4_pattern", MG_CONFIG_TYPE_EXT_PATTERN, NULL},
+ {"cgi4_environment", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"cgi4_interpreter", MG_CONFIG_TYPE_FILE, NULL},
+ {"cgi4_interpreter_args", MG_CONFIG_TYPE_STRING, NULL},
+#if defined(USE_TIMERS)
+ {"cgi4_timeout_ms", MG_CONFIG_TYPE_NUMBER, NULL},
+#endif
+ {"cgi4_buffering", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+
+#endif
+
+ {"put_delete_auth_file", MG_CONFIG_TYPE_FILE, NULL},
+ {"protect_uri", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"authentication_domain", MG_CONFIG_TYPE_STRING, "mydomain.com"},
+ {"enable_auth_domain_check", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+ {"ssi_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.shtml$|**.shtm$"},
+ {"enable_directory_listing", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+ {"enable_webdav", MG_CONFIG_TYPE_BOOLEAN, "no"},
+ {"global_auth_file", MG_CONFIG_TYPE_FILE, NULL},
+ {"index_files",
+ MG_CONFIG_TYPE_STRING_LIST,
+#if defined(USE_LUA)
+ "index.xhtml,index.html,index.htm,"
+ "index.lp,index.lsp,index.lua,index.cgi,"
+ "index.shtml,index.php"},
+#else
+ "index.xhtml,index.html,index.htm,index.cgi,index.shtml,index.php"},
+#endif
+ {"access_control_list", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"extra_mime_types", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"ssl_certificate", MG_CONFIG_TYPE_FILE, NULL},
+ {"ssl_certificate_chain", MG_CONFIG_TYPE_FILE, NULL},
+ {"url_rewrite_patterns", MG_CONFIG_TYPE_STRING_LIST, NULL},
+ {"hide_files_patterns", MG_CONFIG_TYPE_EXT_PATTERN, NULL},
+
+ {"ssl_verify_peer", MG_CONFIG_TYPE_YES_NO_OPTIONAL, "no"},
+ {"ssl_cache_timeout", MG_CONFIG_TYPE_NUMBER, "-1"},
+
+ {"ssl_ca_path", MG_CONFIG_TYPE_DIRECTORY, NULL},
+ {"ssl_ca_file", MG_CONFIG_TYPE_FILE, NULL},
+ {"ssl_verify_depth", MG_CONFIG_TYPE_NUMBER, "9"},
+ {"ssl_default_verify_paths", MG_CONFIG_TYPE_BOOLEAN, "yes"},
+ {"ssl_cipher_list", MG_CONFIG_TYPE_STRING, NULL},
+
+ /* HTTP2 requires ALPN, and anyway TLS1.2 should be considered
+ * as a minimum in 2020 */
+ {"ssl_protocol_version", MG_CONFIG_TYPE_NUMBER, "4"},
+
+ {"ssl_short_trust", MG_CONFIG_TYPE_BOOLEAN, "no"},
+
+#if defined(USE_LUA)
+ {"lua_preload_file", MG_CONFIG_TYPE_FILE, NULL},
+ {"lua_script_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.lua$"},
+ {"lua_server_page_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.lp$|**.lsp$"},
+#if defined(MG_EXPERIMENTAL_INTERFACES)
+ {"lua_debug", MG_CONFIG_TYPE_STRING, NULL},
+#endif
+#endif
+#if defined(USE_DUKTAPE)
+ /* The support for duktape is still in alpha version state.
+ * The name of this config option might change. */
+ {"duktape_script_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.ssjs$"},
+#endif
+
+#if defined(USE_WEBSOCKET)
+ {"websocket_root", MG_CONFIG_TYPE_DIRECTORY, NULL},
+#endif
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ {"lua_websocket_pattern", MG_CONFIG_TYPE_EXT_PATTERN, "**.lua$"},
+#endif
+ {"access_control_allow_origin", MG_CONFIG_TYPE_STRING, "*"},
+ {"access_control_allow_methods", MG_CONFIG_TYPE_STRING, "*"},
+ {"access_control_allow_headers", MG_CONFIG_TYPE_STRING, "*"},
+ {"error_pages", MG_CONFIG_TYPE_DIRECTORY, NULL},
+#if !defined(NO_CACHING)
+ {"static_file_max_age", MG_CONFIG_TYPE_NUMBER, "3600"},
+ {"static_file_cache_control", MG_CONFIG_TYPE_STRING, NULL},
+#endif
+#if !defined(NO_SSL)
+ {"strict_transport_security_max_age", MG_CONFIG_TYPE_NUMBER, NULL},
+#endif
+ {"additional_header", MG_CONFIG_TYPE_STRING_MULTILINE, NULL},
+ {"allow_index_script_resource", MG_CONFIG_TYPE_BOOLEAN, "no"},
+
+ {NULL, MG_CONFIG_TYPE_UNKNOWN, NULL}};
+
+
+/* Check if the config_options and the corresponding enum have compatible
+ * sizes. */
+mg_static_assert((sizeof(config_options) / sizeof(config_options[0]))
+ == (NUM_OPTIONS + 1),
+ "config_options and enum not sync");
+
+
+enum { REQUEST_HANDLER, WEBSOCKET_HANDLER, AUTH_HANDLER };
+
+
+struct mg_handler_info {
+ /* Name/Pattern of the URI. */
+ char *uri;
+ size_t uri_len;
+
+ /* handler type */
+ int handler_type;
+
+ /* Handler for http/https or requests. */
+ mg_request_handler handler;
+ unsigned int refcount;
+ int removing;
+
+ /* Handler for ws/wss (websocket) requests. */
+ mg_websocket_connect_handler connect_handler;
+ mg_websocket_ready_handler ready_handler;
+ mg_websocket_data_handler data_handler;
+ mg_websocket_close_handler close_handler;
+
+ /* accepted subprotocols for ws/wss requests. */
+ struct mg_websocket_subprotocols *subprotocols;
+
+ /* Handler for authorization requests */
+ mg_authorization_handler auth_handler;
+
+ /* User supplied argument for the handler function. */
+ void *cbdata;
+
+ /* next handler in a linked list */
+ struct mg_handler_info *next;
+};
+
+
+enum {
+ CONTEXT_INVALID,
+ CONTEXT_SERVER,
+ CONTEXT_HTTP_CLIENT,
+ CONTEXT_WS_CLIENT
+};
+
+
+struct mg_domain_context {
+ SSL_CTX *ssl_ctx; /* SSL context */
+ char *config[NUM_OPTIONS]; /* Civetweb configuration parameters */
+ struct mg_handler_info *handlers; /* linked list of uri handlers */
+ int64_t ssl_cert_last_mtime;
+
+ /* Server nonce */
+ uint64_t auth_nonce_mask; /* Mask for all nonce values */
+ unsigned long nonce_count; /* Used nonces, used for authentication */
+
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ /* linked list of shared lua websockets */
+ struct mg_shared_lua_websocket_list *shared_lua_websockets;
+#endif
+
+ /* Linked list of domains */
+ struct mg_domain_context *next;
+};
+
+
+/* Stop flag can be "volatile" or require a lock.
+ * MSDN uses volatile for "Interlocked" operations, but also explicitly
+ * states a read operation for int is always atomic. */
+#if defined(STOP_FLAG_NEEDS_LOCK)
+
+typedef ptrdiff_t volatile stop_flag_t;
+
+static int
+STOP_FLAG_IS_ZERO(const stop_flag_t *f)
+{
+ stop_flag_t sf = mg_atomic_add((stop_flag_t *)f, 0);
+ return (sf == 0);
+}
+
+static int
+STOP_FLAG_IS_TWO(stop_flag_t *f)
+{
+ stop_flag_t sf = mg_atomic_add(f, 0);
+ return (sf == 2);
+}
+
+static void
+STOP_FLAG_ASSIGN(stop_flag_t *f, stop_flag_t v)
+{
+ stop_flag_t sf;
+ do {
+ sf = mg_atomic_compare_and_swap(f, *f, v);
+ } while (sf != v);
+}
+
+#else /* STOP_FLAG_NEEDS_LOCK */
+
+typedef int volatile stop_flag_t;
+#define STOP_FLAG_IS_ZERO(f) ((*(f)) == 0)
+#define STOP_FLAG_IS_TWO(f) ((*(f)) == 2)
+#define STOP_FLAG_ASSIGN(f, v) ((*(f)) = (v))
+
+#endif /* STOP_FLAG_NEEDS_LOCK */
+
+
+#if !defined(NUM_WEBDAV_LOCKS)
+#define NUM_WEBDAV_LOCKS 10
+#endif
+#if !defined(LOCK_DURATION_S)
+#define LOCK_DURATION_S 60
+#endif
+
+
+struct twebdav_lock {
+ uint64_t locktime;
+ char token[33];
+ char path[UTF8_PATH_MAX * 2];
+ char user[UTF8_PATH_MAX * 2];
+};
+
+
+struct mg_context {
+
+ /* Part 1 - Physical context:
+ * This holds threads, ports, timeouts, ...
+ * set for the entire server, independent from the
+ * addressed hostname.
+ */
+
+ /* Connection related */
+ int context_type; /* See CONTEXT_* above */
+
+ struct socket *listening_sockets;
+ struct mg_pollfd *listening_socket_fds;
+ unsigned int num_listening_sockets;
+
+ struct mg_connection *worker_connections; /* The connection struct, pre-
+ * allocated for each worker */
+
+#if defined(USE_SERVER_STATS)
+ volatile ptrdiff_t active_connections;
+ volatile ptrdiff_t max_active_connections;
+ volatile ptrdiff_t total_connections;
+ volatile ptrdiff_t total_requests;
+ volatile int64_t total_data_read;
+ volatile int64_t total_data_written;
+#endif
+
+ /* Thread related */
+ stop_flag_t stop_flag; /* Should we stop event loop */
+ pthread_mutex_t thread_mutex; /* Protects client_socks or queue */
+
+ pthread_t masterthreadid; /* The master thread ID */
+ unsigned int
+ cfg_worker_threads; /* The number of configured worker threads. */
+ pthread_t *worker_threadids; /* The worker thread IDs */
+ unsigned long starter_thread_idx; /* thread index which called mg_start */
+
+ /* Connection to thread dispatching */
+#if defined(ALTERNATIVE_QUEUE)
+ struct socket *client_socks;
+ void **client_wait_events;
+#else
+ struct socket *squeue; /* Socket queue (sq) : accepted sockets waiting for a
+ worker thread */
+ volatile int sq_head; /* Head of the socket queue */
+ volatile int sq_tail; /* Tail of the socket queue */
+ pthread_cond_t sq_full; /* Signaled when socket is produced */
+ pthread_cond_t sq_empty; /* Signaled when socket is consumed */
+ volatile int sq_blocked; /* Status information: sq is full */
+ int sq_size; /* No of elements in socket queue */
+#if defined(USE_SERVER_STATS)
+ int sq_max_fill;
+#endif /* USE_SERVER_STATS */
+#endif /* ALTERNATIVE_QUEUE */
+
+ /* Memory related */
+ unsigned int max_request_size; /* The max request size */
+
+#if defined(USE_SERVER_STATS)
+ struct mg_memory_stat ctx_memory;
+#endif
+
+ /* WebDAV lock structures */
+ struct twebdav_lock webdav_lock[NUM_WEBDAV_LOCKS];
+
+ /* Operating system related */
+ char *systemName; /* What operating system is running */
+ time_t start_time; /* Server start time, used for authentication
+ * and for diagnstics. */
+
+#if defined(USE_TIMERS)
+ struct ttimers *timers;
+#endif
+
+ /* Lua specific: Background operations and shared websockets */
+#if defined(USE_LUA)
+ void *lua_background_state; /* lua_State (here as void *) */
+ pthread_mutex_t lua_bg_mutex; /* Protect background state */
+ int lua_bg_log_available; /* Use Lua background state for access log */
+#endif
+
+ /* Server nonce */
+ pthread_mutex_t nonce_mutex; /* Protects ssl_ctx, handlers,
+ * ssl_cert_last_mtime, nonce_count, and
+ * next (linked list) */
+
+ /* Server callbacks */
+ struct mg_callbacks callbacks; /* User-defined callback function */
+ void *user_data; /* User-defined data */
+
+ /* Part 2 - Logical domain:
+ * This holds hostname, TLS certificate, document root, ...
+ * set for a domain hosted at the server.
+ * There may be multiple domains hosted at one physical server.
+ * The default domain "dd" is the first element of a list of
+ * domains.
+ */
+ struct mg_domain_context dd; /* default domain */
+};
+
+
+#if defined(USE_SERVER_STATS)
+static struct mg_memory_stat mg_common_memory = {0, 0, 0};
+
+static struct mg_memory_stat *
+get_memory_stat(struct mg_context *ctx)
+{
+ if (ctx) {
+ return &(ctx->ctx_memory);
+ }
+ return &mg_common_memory;
+}
+#endif
+
+enum {
+ CONNECTION_TYPE_INVALID = 0,
+ CONNECTION_TYPE_REQUEST = 1,
+ CONNECTION_TYPE_RESPONSE = 2
+};
+
+enum {
+ PROTOCOL_TYPE_HTTP1 = 0,
+ PROTOCOL_TYPE_WEBSOCKET = 1,
+ PROTOCOL_TYPE_HTTP2 = 2
+};
+
+
+#if defined(USE_HTTP2)
+#if !defined(HTTP2_DYN_TABLE_SIZE)
+#define HTTP2_DYN_TABLE_SIZE (256)
+#endif
+
+struct mg_http2_connection {
+ uint32_t stream_id;
+ uint32_t dyn_table_size;
+ struct mg_header dyn_table[HTTP2_DYN_TABLE_SIZE];
+};
+#endif
+
+
+struct mg_connection {
+ int connection_type; /* see CONNECTION_TYPE_* above */
+ int protocol_type; /* see PROTOCOL_TYPE_*: 0=http/1.x, 1=ws, 2=http/2 */
+ int request_state; /* 0: nothing sent, 1: header partially sent, 2: header
+ fully sent */
+#if defined(USE_HTTP2)
+ struct mg_http2_connection http2;
+#endif
+
+ struct mg_request_info request_info;
+ struct mg_response_info response_info;
+
+ struct mg_context *phys_ctx;
+ struct mg_domain_context *dom_ctx;
+
+#if defined(USE_SERVER_STATS)
+ int conn_state; /* 0 = undef, numerical value may change in different
+ * versions. For the current definition, see
+ * mg_get_connection_info_impl */
+#endif
+
+ SSL *ssl; /* SSL descriptor */
+ struct socket client; /* Connected client */
+ time_t conn_birth_time; /* Time (wall clock) when connection was
+ * established */
+#if defined(USE_SERVER_STATS)
+ time_t conn_close_time; /* Time (wall clock) when connection was
+ * closed (or 0 if still open) */
+ double processing_time; /* Processing time for one request. */
+#endif
+ struct timespec req_time; /* Time (since system start) when the request
+ * was received */
+ int64_t num_bytes_sent; /* Total bytes sent to client */
+ int64_t content_len; /* How many bytes of content can be read
+ * !is_chunked: Content-Length header value
+ * or -1 (until connection closed,
+ * not allowed for a request)
+ * is_chunked: >= 0, appended gradually
+ */
+ int64_t consumed_content; /* How many bytes of content have been read */
+ int is_chunked; /* Transfer-Encoding is chunked:
+ * 0 = not chunked,
+ * 1 = chunked, not yet, or some data read,
+ * 2 = chunked, has error,
+ * 3 = chunked, all data read except trailer,
+ * 4 = chunked, all data read
+ */
+ char *buf; /* Buffer for received data */
+ char *path_info; /* PATH_INFO part of the URL */
+
+ int must_close; /* 1 if connection must be closed */
+ int accept_gzip; /* 1 if gzip encoding is accepted */
+ int in_error_handler; /* 1 if in handler for user defined error
+ * pages */
+#if defined(USE_WEBSOCKET)
+ int in_websocket_handling; /* 1 if in read_websocket */
+#endif
+#if defined(USE_ZLIB) && defined(USE_WEBSOCKET) \
+ && defined(MG_EXPERIMENTAL_INTERFACES)
+ /* Parameters for websocket data compression according to rfc7692 */
+ int websocket_deflate_server_max_windows_bits;
+ int websocket_deflate_client_max_windows_bits;
+ int websocket_deflate_server_no_context_takeover;
+ int websocket_deflate_client_no_context_takeover;
+ int websocket_deflate_initialized;
+ int websocket_deflate_flush;
+ z_stream websocket_deflate_state;
+ z_stream websocket_inflate_state;
+#endif
+ int handled_requests; /* Number of requests handled by this connection
+ */
+ int buf_size; /* Buffer size */
+ int request_len; /* Size of the request + headers in a buffer */
+ int data_len; /* Total size of data in a buffer */
+ int status_code; /* HTTP reply status code, e.g. 200 */
+ int throttle; /* Throttling, bytes/sec. <= 0 means no
+ * throttle */
+
+ time_t last_throttle_time; /* Last time throttled data was sent */
+ int last_throttle_bytes; /* Bytes sent this second */
+ pthread_mutex_t mutex; /* Used by mg_(un)lock_connection to ensure
+ * atomic transmissions for websockets */
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ void *lua_websocket_state; /* Lua_State for a websocket connection */
+#endif
+
+ void *tls_user_ptr; /* User defined pointer in thread local storage,
+ * for quick access */
+};
+
+
+/* Directory entry */
+struct de {
+ char *file_name;
+ struct mg_file_stat file;
+};
+
+
+#define mg_cry_internal(conn, fmt, ...) \
+ mg_cry_internal_wrap(conn, NULL, __func__, __LINE__, fmt, __VA_ARGS__)
+
+#define mg_cry_ctx_internal(ctx, fmt, ...) \
+ mg_cry_internal_wrap(NULL, ctx, __func__, __LINE__, fmt, __VA_ARGS__)
+
+static void mg_cry_internal_wrap(const struct mg_connection *conn,
+ struct mg_context *ctx,
+ const char *func,
+ unsigned line,
+ const char *fmt,
+ ...) PRINTF_ARGS(5, 6);
+
+
+#if !defined(NO_THREAD_NAME)
+#if defined(_WIN32) && defined(_MSC_VER)
+/* Set the thread name for debugging purposes in Visual Studio
+ * http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
+ */
+#pragma pack(push, 8)
+typedef struct tagTHREADNAME_INFO {
+ DWORD dwType; /* Must be 0x1000. */
+ LPCSTR szName; /* Pointer to name (in user addr space). */
+ DWORD dwThreadID; /* Thread ID (-1=caller thread). */
+ DWORD dwFlags; /* Reserved for future use, must be zero. */
+} THREADNAME_INFO;
+#pragma pack(pop)
+
+#elif defined(__linux__)
+
+#include <sys/prctl.h>
+#include <sys/sendfile.h>
+#if defined(ALTERNATIVE_QUEUE)
+#include <sys/eventfd.h>
+#endif /* ALTERNATIVE_QUEUE */
+
+
+#if defined(ALTERNATIVE_QUEUE)
+
+static void *
+event_create(void)
+{
+ int evhdl = eventfd(0, EFD_CLOEXEC);
+ int *ret;
+
+ if (evhdl == -1) {
+ /* Linux uses -1 on error, Windows NULL. */
+ /* However, Linux does not return 0 on success either. */
+ return 0;
+ }
+
+ ret = (int *)mg_malloc(sizeof(int));
+ if (ret) {
+ *ret = evhdl;
+ } else {
+ (void)close(evhdl);
+ }
+
+ return (void *)ret;
+}
+
+
+static int
+event_wait(void *eventhdl)
+{
+ uint64_t u;
+ int evhdl, s;
+
+ if (!eventhdl) {
+ /* error */
+ return 0;
+ }
+ evhdl = *(int *)eventhdl;
+
+ s = (int)read(evhdl, &u, sizeof(u));
+ if (s != sizeof(u)) {
+ /* error */
+ return 0;
+ }
+ (void)u; /* the value is not required */
+ return 1;
+}
+
+
+static int
+event_signal(void *eventhdl)
+{
+ uint64_t u = 1;
+ int evhdl, s;
+
+ if (!eventhdl) {
+ /* error */
+ return 0;
+ }
+ evhdl = *(int *)eventhdl;
+
+ s = (int)write(evhdl, &u, sizeof(u));
+ if (s != sizeof(u)) {
+ /* error */
+ return 0;
+ }
+ return 1;
+}
+
+
+static void
+event_destroy(void *eventhdl)
+{
+ int evhdl;
+
+ if (!eventhdl) {
+ /* error */
+ return;
+ }
+ evhdl = *(int *)eventhdl;
+
+ close(evhdl);
+ mg_free(eventhdl);
+}
+
+
+#endif
+
+#endif
+
+
+#if !defined(__linux__) && !defined(_WIN32) && defined(ALTERNATIVE_QUEUE)
+
+struct posix_event {
+ pthread_mutex_t mutex;
+ pthread_cond_t cond;
+ int signaled;
+};
+
+
+static void *
+event_create(void)
+{
+ struct posix_event *ret = mg_malloc(sizeof(struct posix_event));
+ if (ret == 0) {
+ /* out of memory */
+ return 0;
+ }
+ if (0 != pthread_mutex_init(&(ret->mutex), NULL)) {
+ /* pthread mutex not available */
+ mg_free(ret);
+ return 0;
+ }
+ if (0 != pthread_cond_init(&(ret->cond), NULL)) {
+ /* pthread cond not available */
+ pthread_mutex_destroy(&(ret->mutex));
+ mg_free(ret);
+ return 0;
+ }
+ ret->signaled = 0;
+ return (void *)ret;
+}
+
+
+static int
+event_wait(void *eventhdl)
+{
+ struct posix_event *ev = (struct posix_event *)eventhdl;
+ pthread_mutex_lock(&(ev->mutex));
+ while (!ev->signaled) {
+ pthread_cond_wait(&(ev->cond), &(ev->mutex));
+ }
+ ev->signaled = 0;
+ pthread_mutex_unlock(&(ev->mutex));
+ return 1;
+}
+
+
+static int
+event_signal(void *eventhdl)
+{
+ struct posix_event *ev = (struct posix_event *)eventhdl;
+ pthread_mutex_lock(&(ev->mutex));
+ pthread_cond_signal(&(ev->cond));
+ ev->signaled = 1;
+ pthread_mutex_unlock(&(ev->mutex));
+ return 1;
+}
+
+
+static void
+event_destroy(void *eventhdl)
+{
+ struct posix_event *ev = (struct posix_event *)eventhdl;
+ pthread_cond_destroy(&(ev->cond));
+ pthread_mutex_destroy(&(ev->mutex));
+ mg_free(ev);
+}
+#endif
+
+
+static void
+mg_set_thread_name(const char *name)
+{
+ char threadName[16 + 1]; /* 16 = Max. thread length in Linux/OSX/.. */
+
+ mg_snprintf(
+ NULL, NULL, threadName, sizeof(threadName), "civetweb-%s", name);
+
+#if defined(_WIN32)
+#if defined(_MSC_VER)
+ /* Windows and Visual Studio Compiler */
+ __try {
+ THREADNAME_INFO info;
+ info.dwType = 0x1000;
+ info.szName = threadName;
+ info.dwThreadID = ~0U;
+ info.dwFlags = 0;
+
+ RaiseException(0x406D1388,
+ 0,
+ sizeof(info) / sizeof(ULONG_PTR),
+ (ULONG_PTR *)&info);
+ } __except (EXCEPTION_EXECUTE_HANDLER) {
+ }
+#elif defined(__MINGW32__)
+ /* No option known to set thread name for MinGW known */
+#endif
+#elif defined(_GNU_SOURCE) && defined(__GLIBC__) \
+ && ((__GLIBC__ > 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 12)))
+ /* pthread_setname_np first appeared in glibc in version 2.12 */
+#if defined(__MACH__) && defined(__APPLE__)
+ /* OS X only current thread name can be changed */
+ (void)pthread_setname_np(threadName);
+#else
+ (void)pthread_setname_np(pthread_self(), threadName);
+#endif
+#elif defined(__linux__)
+ /* On Linux we can use the prctl function.
+ * When building for Linux Standard Base (LSB) use
+ * NO_THREAD_NAME. However, thread names are a big
+ * help for debugging, so the stadard is to set them.
+ */
+ (void)prctl(PR_SET_NAME, threadName, 0, 0, 0);
+#endif
+}
+#else /* !defined(NO_THREAD_NAME) */
+static void
+mg_set_thread_name(const char *threadName)
+{
+}
+#endif
+
+
+CIVETWEB_API const struct mg_option *
+mg_get_valid_options(void)
+{
+ return config_options;
+}
+
+
+/* Do not open file (unused) */
+#define MG_FOPEN_MODE_NONE (0)
+
+/* Open file for read only access */
+#define MG_FOPEN_MODE_READ (1)
+
+/* Open file for writing, create and overwrite */
+#define MG_FOPEN_MODE_WRITE (2)
+
+/* Open file for writing, create and append */
+#define MG_FOPEN_MODE_APPEND (4)
+
+
+static int
+is_file_opened(const struct mg_file_access *fileacc)
+{
+ if (!fileacc) {
+ return 0;
+ }
+
+ return (fileacc->fp != NULL);
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+static int mg_stat(const struct mg_connection *conn,
+ const char *path,
+ struct mg_file_stat *filep);
+
+
+/* Reject files with special characters (for Windows) */
+static int
+mg_path_suspicious(const struct mg_connection *conn, const char *path)
+{
+ const uint8_t *c = (const uint8_t *)path;
+ (void)conn; /* not used */
+
+ if ((c == NULL) || (c[0] == 0)) {
+ /* Null pointer or empty path --> suspicious */
+ return 1;
+ }
+
+#if defined(_WIN32)
+ while (*c) {
+ if (*c < 32) {
+ /* Control character */
+ return 1;
+ }
+ if ((*c == '>') || (*c == '<') || (*c == '|')) {
+ /* stdin/stdout redirection character */
+ return 1;
+ }
+ if ((*c == '*') || (*c == '?')) {
+ /* Wildcard character */
+ return 1;
+ }
+ if (*c == '"') {
+ /* Windows quotation */
+ return 1;
+ }
+ c++;
+ }
+#endif
+
+ /* Nothing suspicious found */
+ return 0;
+}
+
+
+/* mg_fopen will open a file either in memory or on the disk.
+ * The input parameter path is a string in UTF-8 encoding.
+ * The input parameter mode is MG_FOPEN_MODE_*
+ * On success, fp will be set in the output struct mg_file.
+ * All status members will also be set.
+ * The function returns 1 on success, 0 on error. */
+static int
+mg_fopen(const struct mg_connection *conn,
+ const char *path,
+ int mode,
+ struct mg_file *filep)
+{
+ int found;
+
+ if (!filep) {
+ return 0;
+ }
+ filep->access.fp = NULL;
+
+ if (mg_path_suspicious(conn, path)) {
+ return 0;
+ }
+
+ /* filep is initialized in mg_stat: all fields with memset to,
+ * some fields like size and modification date with values */
+ found = mg_stat(conn, path, &(filep->stat));
+
+ if ((mode == MG_FOPEN_MODE_READ) && (!found)) {
+ /* file does not exist and will not be created */
+ return 0;
+ }
+
+#if defined(_WIN32)
+ {
+ wchar_t wbuf[UTF16_PATH_MAX];
+ path_to_unicode(conn, path, wbuf, ARRAY_SIZE(wbuf));
+ switch (mode) {
+ case MG_FOPEN_MODE_READ:
+ filep->access.fp = _wfopen(wbuf, L"rb");
+ break;
+ case MG_FOPEN_MODE_WRITE:
+ filep->access.fp = _wfopen(wbuf, L"wb");
+ break;
+ case MG_FOPEN_MODE_APPEND:
+ filep->access.fp = _wfopen(wbuf, L"ab");
+ break;
+ }
+ }
+#else
+ /* Linux et al already use unicode. No need to convert. */
+ switch (mode) {
+ case MG_FOPEN_MODE_READ:
+ filep->access.fp = fopen(path, "r");
+ break;
+ case MG_FOPEN_MODE_WRITE:
+ filep->access.fp = fopen(path, "w");
+ break;
+ case MG_FOPEN_MODE_APPEND:
+ filep->access.fp = fopen(path, "a");
+ break;
+ }
+
+#endif
+ if (!found) {
+ /* File did not exist before fopen was called.
+ * Maybe it has been created now. Get stat info
+ * like creation time now. */
+ found = mg_stat(conn, path, &(filep->stat));
+ (void)found;
+ }
+
+ /* return OK if file is opened */
+ return (filep->access.fp != NULL);
+}
+
+
+/* return 0 on success, just like fclose */
+static int
+mg_fclose(struct mg_file_access *fileacc)
+{
+ int ret = -1;
+ if (fileacc != NULL) {
+ if (fileacc->fp != NULL) {
+ ret = fclose(fileacc->fp);
+ }
+ /* reset all members of fileacc */
+ memset(fileacc, 0, sizeof(*fileacc));
+ }
+ return ret;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+static void
+mg_strlcpy(char *dst, const char *src, size_t n)
+{
+ for (; *src != '\0' && n > 1; n--) {
+ *dst++ = *src++;
+ }
+ *dst = '\0';
+}
+
+
+static int
+lowercase(const char *s)
+{
+ return tolower((unsigned char)*s);
+}
+
+
+CIVETWEB_API int
+mg_strncasecmp(const char *s1, const char *s2, size_t len)
+{
+ int diff = 0;
+
+ if (len > 0) {
+ do {
+ diff = lowercase(s1++) - lowercase(s2++);
+ } while (diff == 0 && s1[-1] != '\0' && --len > 0);
+ }
+
+ return diff;
+}
+
+
+CIVETWEB_API int
+mg_strcasecmp(const char *s1, const char *s2)
+{
+ int diff;
+
+ do {
+ diff = lowercase(s1++) - lowercase(s2++);
+ } while (diff == 0 && s1[-1] != '\0');
+
+ return diff;
+}
+
+
+static char *
+mg_strndup_ctx(const char *ptr, size_t len, struct mg_context *ctx)
+{
+ char *p;
+ (void)ctx; /* Avoid Visual Studio warning if USE_SERVER_STATS is not
+ * defined */
+
+ if ((p = (char *)mg_malloc_ctx(len + 1, ctx)) != NULL) {
+ mg_strlcpy(p, ptr, len + 1);
+ }
+
+ return p;
+}
+
+
+static char *
+mg_strdup_ctx(const char *str, struct mg_context *ctx)
+{
+ return mg_strndup_ctx(str, strlen(str), ctx);
+}
+
+static char *
+mg_strdup(const char *str)
+{
+ return mg_strndup_ctx(str, strlen(str), NULL);
+}
+
+
+static const char *
+mg_strcasestr(const char *big_str, const char *small_str)
+{
+ size_t i, big_len = strlen(big_str), small_len = strlen(small_str);
+
+ if (big_len >= small_len) {
+ for (i = 0; i <= (big_len - small_len); i++) {
+ if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) {
+ return big_str + i;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+
+/* Return null terminated string of given maximum length.
+ * Report errors if length is exceeded. */
+static void
+mg_vsnprintf(const struct mg_connection *conn,
+ int *truncated,
+ char *buf,
+ size_t buflen,
+ const char *fmt,
+ va_list ap)
+{
+ int n, ok;
+
+ if (buflen == 0) {
+ if (truncated) {
+ *truncated = 1;
+ }
+ return;
+ }
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wformat-nonliteral"
+ /* Using fmt as a non-literal is intended here, since it is mostly called
+ * indirectly by mg_snprintf */
+#endif
+
+ n = (int)vsnprintf_impl(buf, buflen, fmt, ap);
+ ok = (n >= 0) && ((size_t)n < buflen);
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+ if (ok) {
+ if (truncated) {
+ *truncated = 0;
+ }
+ } else {
+ if (truncated) {
+ *truncated = 1;
+ }
+ mg_cry_internal(conn,
+ "truncating vsnprintf buffer: [%.*s]",
+ (int)((buflen > 200) ? 200 : (buflen - 1)),
+ buf);
+ n = (int)buflen - 1;
+ }
+ buf[n] = '\0';
+}
+
+
+static void
+mg_snprintf(const struct mg_connection *conn,
+ int *truncated,
+ char *buf,
+ size_t buflen,
+ const char *fmt,
+ ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ mg_vsnprintf(conn, truncated, buf, buflen, fmt, ap);
+ va_end(ap);
+}
+
+
+static int
+get_option_index(const char *name)
+{
+ int i;
+
+ for (i = 0; config_options[i].name != NULL; i++) {
+ if (strcmp(config_options[i].name, name) == 0) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+
+CIVETWEB_API const char *
+mg_get_option(const struct mg_context *ctx, const char *name)
+{
+ int i;
+ if ((i = get_option_index(name)) == -1) {
+ return NULL;
+ } else if (!ctx || ctx->dd.config[i] == NULL) {
+ return "";
+ } else {
+ return ctx->dd.config[i];
+ }
+}
+
+#define mg_get_option DO_NOT_USE_THIS_FUNCTION_INTERNALLY__access_directly
+
+CIVETWEB_API struct mg_context *
+mg_get_context(const struct mg_connection *conn)
+{
+ return (conn == NULL) ? (struct mg_context *)NULL : (conn->phys_ctx);
+}
+
+
+CIVETWEB_API void *
+mg_get_user_data(const struct mg_context *ctx)
+{
+ return (ctx == NULL) ? NULL : ctx->user_data;
+}
+
+
+CIVETWEB_API void *
+mg_get_user_context_data(const struct mg_connection *conn)
+{
+ return mg_get_user_data(mg_get_context(conn));
+}
+
+
+CIVETWEB_API void *
+mg_get_thread_pointer(const struct mg_connection *conn)
+{
+ /* both methods should return the same pointer */
+ if (conn) {
+ /* quick access, in case conn is known */
+ return conn->tls_user_ptr;
+ } else {
+ /* otherwise get pointer from thread local storage (TLS) */
+ struct mg_workerTLS *tls =
+ (struct mg_workerTLS *)pthread_getspecific(sTlsKey);
+ return tls->user_ptr;
+ }
+}
+
+
+CIVETWEB_API void
+mg_set_user_connection_data(const struct mg_connection *const_conn, void *data)
+{
+ if (const_conn != NULL) {
+ /* Const cast, since "const struct mg_connection *" does not mean
+ * the connection object is not modified. Here "const" is used,
+ * to indicate mg_read/mg_write/mg_send/.. must not be called. */
+ struct mg_connection *conn = (struct mg_connection *)const_conn;
+ conn->request_info.conn_data = data;
+ }
+}
+
+
+CIVETWEB_API void *
+mg_get_user_connection_data(const struct mg_connection *conn)
+{
+ if (conn != NULL) {
+ return conn->request_info.conn_data;
+ }
+ return NULL;
+}
+
+
+CIVETWEB_API int
+mg_get_server_ports(const struct mg_context *ctx,
+ int size,
+ struct mg_server_port *ports)
+{
+ int i, cnt = 0;
+
+ if (size <= 0) {
+ return -1;
+ }
+ memset(ports, 0, sizeof(*ports) * (size_t)size);
+ if (!ctx) {
+ return -1;
+ }
+ if (!ctx->listening_sockets) {
+ return -1;
+ }
+
+ for (i = 0; (i < size) && (i < (int)ctx->num_listening_sockets); i++) {
+
+ ports[cnt].port =
+ ntohs(USA_IN_PORT_UNSAFE(&(ctx->listening_sockets[i].lsa)));
+ ports[cnt].is_ssl = ctx->listening_sockets[i].is_ssl;
+ ports[cnt].is_redirect = ctx->listening_sockets[i].ssl_redir;
+
+ if (ctx->listening_sockets[i].lsa.sa.sa_family == AF_INET) {
+ /* IPv4 */
+ ports[cnt].protocol = 1;
+ cnt++;
+ } else if (ctx->listening_sockets[i].lsa.sa.sa_family == AF_INET6) {
+ /* IPv6 */
+ ports[cnt].protocol = 3;
+ cnt++;
+ }
+ }
+
+ return cnt;
+}
+
+
+#if defined(USE_X_DOM_SOCKET) && !defined(UNIX_DOMAIN_SOCKET_SERVER_NAME)
+#define UNIX_DOMAIN_SOCKET_SERVER_NAME "*"
+#endif
+
+static void
+sockaddr_to_string(char *buf, size_t len, const union usa *usa)
+{
+ buf[0] = '\0';
+
+ if (!usa) {
+ return;
+ }
+
+ if (usa->sa.sa_family == AF_INET) {
+ getnameinfo(&usa->sa,
+ sizeof(usa->sin),
+ buf,
+ (unsigned)len,
+ NULL,
+ 0,
+ NI_NUMERICHOST);
+ }
+#if defined(USE_IPV6)
+ else if (usa->sa.sa_family == AF_INET6) {
+ getnameinfo(&usa->sa,
+ sizeof(usa->sin6),
+ buf,
+ (unsigned)len,
+ NULL,
+ 0,
+ NI_NUMERICHOST);
+ }
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ else if (usa->sa.sa_family == AF_UNIX) {
+ /* TODO: Define a remote address for unix domain sockets.
+ * This code will always return "localhost", identical to http+tcp:
+ getnameinfo(&usa->sa,
+ sizeof(usa->sun),
+ buf,
+ (unsigned)len,
+ NULL,
+ 0,
+ NI_NUMERICHOST);
+ */
+ mg_strlcpy(buf, UNIX_DOMAIN_SOCKET_SERVER_NAME, len);
+ }
+#endif
+}
+
+
+/* Convert time_t to a string. According to RFC2616, Sec 14.18, this must be
+ * included in all responses other than 100, 101, 5xx. */
+static void
+gmt_time_string(char *buf, size_t buf_len, time_t *t)
+{
+#if !defined(REENTRANT_TIME)
+ struct tm *tm;
+
+ tm = ((t != NULL) ? gmtime(t) : NULL);
+ if (tm != NULL) {
+#else
+ struct tm _tm;
+ struct tm *tm = &_tm;
+
+ if (t != NULL) {
+ gmtime_r(t, tm);
+#endif
+ strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", tm);
+ } else {
+ mg_strlcpy(buf, "Thu, 01 Jan 1970 00:00:00 GMT", buf_len);
+ }
+}
+
+
+/* difftime for struct timespec. Return value is in seconds. */
+static double
+mg_difftimespec(const struct timespec *ts_now, const struct timespec *ts_before)
+{
+ return (double)(ts_now->tv_nsec - ts_before->tv_nsec) * 1.0E-9
+ + (double)(ts_now->tv_sec - ts_before->tv_sec);
+}
+
+
+#if defined(MG_EXTERNAL_FUNCTION_mg_cry_internal_impl)
+static void mg_cry_internal_impl(const struct mg_connection *conn,
+ const char *func,
+ unsigned line,
+ const char *fmt,
+ va_list ap);
+#include "external_mg_cry_internal_impl.inl"
+#elif !defined(NO_FILESYSTEMS)
+
+/* Print error message to the opened error log stream. */
+static void
+mg_cry_internal_impl(const struct mg_connection *conn,
+ const char *func,
+ unsigned line,
+ const char *fmt,
+ va_list ap)
+{
+ char buf[MG_BUF_LEN], src_addr[IP_ADDR_STR_LEN];
+ struct mg_file fi;
+ time_t timestamp;
+
+ /* Unused, in the RELEASE build */
+ (void)func;
+ (void)line;
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+#endif
+
+ IGNORE_UNUSED_RESULT(vsnprintf_impl(buf, sizeof(buf), fmt, ap));
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif
+
+ buf[sizeof(buf) - 1] = 0;
+
+ DEBUG_TRACE("mg_cry called from %s:%u: %s", func, line, buf);
+
+ if (!conn) {
+ puts(buf);
+ return;
+ }
+
+ /* Do not lock when getting the callback value, here and below.
+ * I suppose this is fine, since function cannot disappear in the
+ * same way string option can. */
+ if ((conn->phys_ctx->callbacks.log_message == NULL)
+ || (conn->phys_ctx->callbacks.log_message(conn, buf) == 0)) {
+
+ if (conn->dom_ctx->config[ERROR_LOG_FILE] != NULL) {
+ if (mg_fopen(conn,
+ conn->dom_ctx->config[ERROR_LOG_FILE],
+ MG_FOPEN_MODE_APPEND,
+ &fi)
+ == 0) {
+ fi.access.fp = NULL;
+ }
+ } else {
+ fi.access.fp = NULL;
+ }
+
+ if (fi.access.fp != NULL) {
+ flockfile(fi.access.fp);
+ timestamp = time(NULL);
+
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+ fprintf(fi.access.fp,
+ "[%010lu] [error] [client %s] ",
+ (unsigned long)timestamp,
+ src_addr);
+
+ if (conn->request_info.request_method != NULL) {
+ fprintf(fi.access.fp,
+ "%s %s: ",
+ conn->request_info.request_method,
+ conn->request_info.request_uri
+ ? conn->request_info.request_uri
+ : "");
+ }
+
+ fprintf(fi.access.fp, "%s", buf);
+ fputc('\n', fi.access.fp);
+ fflush(fi.access.fp);
+ funlockfile(fi.access.fp);
+ (void)mg_fclose(&fi.access); /* Ignore errors. We can't call
+ * mg_cry here anyway ;-) */
+ }
+ }
+}
+#else
+#error Must either enable filesystems or provide a custom mg_cry_internal_impl implementation
+#endif /* Externally provided function */
+
+
+/* Construct fake connection structure. Used for logging, if connection
+ * is not applicable at the moment of logging. */
+static struct mg_connection *
+fake_connection(struct mg_connection *fc, struct mg_context *ctx)
+{
+ static const struct mg_connection conn_zero = {0};
+ *fc = conn_zero;
+ fc->phys_ctx = ctx;
+ fc->dom_ctx = &(ctx->dd);
+ return fc;
+}
+
+
+static void
+mg_cry_internal_wrap(const struct mg_connection *conn,
+ struct mg_context *ctx,
+ const char *func,
+ unsigned line,
+ const char *fmt,
+ ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ if (!conn && ctx) {
+ struct mg_connection fc;
+ mg_cry_internal_impl(fake_connection(&fc, ctx), func, line, fmt, ap);
+ } else {
+ mg_cry_internal_impl(conn, func, line, fmt, ap);
+ }
+ va_end(ap);
+}
+
+
+CIVETWEB_API void
+mg_cry(const struct mg_connection *conn, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ mg_cry_internal_impl(conn, "user", 0, fmt, ap);
+ va_end(ap);
+}
+
+
+#define mg_cry DO_NOT_USE_THIS_FUNCTION__USE_mg_cry_internal
+
+
+CIVETWEB_API const char *
+mg_version(void)
+{
+ return CIVETWEB_VERSION;
+}
+
+
+CIVETWEB_API const struct mg_request_info *
+mg_get_request_info(const struct mg_connection *conn)
+{
+ if (!conn) {
+ return NULL;
+ }
+#if defined(MG_ALLOW_USING_GET_REQUEST_INFO_FOR_RESPONSE)
+ if (conn->connection_type == CONNECTION_TYPE_RESPONSE) {
+ char txt[16];
+ struct mg_workerTLS *tls =
+ (struct mg_workerTLS *)pthread_getspecific(sTlsKey);
+
+ sprintf(txt, "%03i", conn->response_info.status_code);
+ if (strlen(txt) == 3) {
+ memcpy(tls->txtbuf, txt, 4);
+ } else {
+ strcpy(tls->txtbuf, "ERR");
+ }
+
+ ((struct mg_connection *)conn)->request_info.local_uri =
+ tls->txtbuf; /* use thread safe buffer */
+ ((struct mg_connection *)conn)->request_info.local_uri_raw =
+ tls->txtbuf; /* use the same thread safe buffer */
+ ((struct mg_connection *)conn)->request_info.request_uri =
+ tls->txtbuf; /* use the same thread safe buffer */
+
+ ((struct mg_connection *)conn)->request_info.num_headers =
+ conn->response_info.num_headers;
+ memcpy(((struct mg_connection *)conn)->request_info.http_headers,
+ conn->response_info.http_headers,
+ sizeof(conn->response_info.http_headers));
+ } else
+#endif
+ if (conn->connection_type != CONNECTION_TYPE_REQUEST) {
+ return NULL;
+ }
+ return &conn->request_info;
+}
+
+
+CIVETWEB_API const struct mg_response_info *
+mg_get_response_info(const struct mg_connection *conn)
+{
+ if (!conn) {
+ return NULL;
+ }
+ if (conn->connection_type != CONNECTION_TYPE_RESPONSE) {
+ return NULL;
+ }
+ return &conn->response_info;
+}
+
+
+static const char *
+get_proto_name(const struct mg_connection *conn)
+{
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunreachable-code"
+ /* Depending on USE_WEBSOCKET and NO_SSL, some oft the protocols might be
+ * not supported. Clang raises an "unreachable code" warning for parts of ?:
+ * unreachable, but splitting into four different #ifdef clauses here is
+ * more complicated.
+ */
+#endif
+
+ const struct mg_request_info *ri = &conn->request_info;
+
+ const char *proto = ((conn->protocol_type == PROTOCOL_TYPE_WEBSOCKET)
+ ? (ri->is_ssl ? "wss" : "ws")
+ : (ri->is_ssl ? "https" : "http"));
+
+ return proto;
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+}
+
+
+static int
+mg_construct_local_link(const struct mg_connection *conn,
+ char *buf,
+ size_t buflen,
+ const char *define_proto,
+ int define_port,
+ const char *define_uri)
+{
+ if ((buflen < 1) || (buf == 0) || (conn == 0)) {
+ return -1;
+ } else {
+ int i, j;
+ int truncated = 0;
+ const struct mg_request_info *ri = &conn->request_info;
+
+ const char *proto =
+ (define_proto != NULL) ? define_proto : get_proto_name(conn);
+ const char *uri =
+ (define_uri != NULL)
+ ? define_uri
+ : ((ri->request_uri != NULL) ? ri->request_uri : ri->local_uri);
+ int port = (define_port > 0) ? define_port : ri->server_port;
+ int default_port = 80;
+ char *uri_encoded;
+ size_t uri_encoded_len;
+
+ if (uri == NULL) {
+ return -1;
+ }
+
+ uri_encoded_len = strlen(uri) * 3 + 1;
+ uri_encoded = (char *)mg_malloc_ctx(uri_encoded_len, conn->phys_ctx);
+ if (uri_encoded == NULL) {
+ return -1;
+ }
+ mg_url_encode(uri, uri_encoded, uri_encoded_len);
+
+ /* Directory separator should be preserved. */
+ for (i = j = 0; uri_encoded[i]; j++) {
+ if (!strncmp(uri_encoded + i, "%2f", 3)) {
+ uri_encoded[j] = '/';
+ i += 3;
+ } else {
+ uri_encoded[j] = uri_encoded[i++];
+ }
+ }
+ uri_encoded[j] = '\0';
+
+#if defined(USE_X_DOM_SOCKET)
+ if (conn->client.lsa.sa.sa_family == AF_UNIX) {
+ /* TODO: Define and document a link for UNIX domain sockets. */
+ /* There seems to be no official standard for this.
+ * Common uses seem to be "httpunix://", "http.unix://" or
+ * "http+unix://" as a protocol definition string, followed by
+ * "localhost" or "127.0.0.1" or "/tmp/unix/path" or
+ * "%2Ftmp%2Funix%2Fpath" (url % encoded) or
+ * "localhost:%2Ftmp%2Funix%2Fpath" (domain socket path as port) or
+ * "" (completely skipping the server name part). In any case, the
+ * last part is the server local path. */
+ const char *server_name = UNIX_DOMAIN_SOCKET_SERVER_NAME;
+ mg_snprintf(conn,
+ &truncated,
+ buf,
+ buflen,
+ "%s.unix://%s%s",
+ proto,
+ server_name,
+ ri->local_uri);
+ default_port = 0;
+ mg_free(uri_encoded);
+ return 0;
+ }
+#endif
+
+ if (define_proto) {
+ /* If we got a protocol name, use the default port accordingly. */
+ if ((0 == strcmp(define_proto, "https"))
+ || (0 == strcmp(define_proto, "wss"))) {
+ default_port = 443;
+ }
+ } else if (ri->is_ssl) {
+ /* If we did not get a protocol name, use TLS as default if it is
+ * already used. */
+ default_port = 443;
+ }
+
+ {
+#if defined(USE_IPV6)
+ int is_ipv6 = (conn->client.lsa.sa.sa_family == AF_INET6);
+#endif
+ int auth_domain_check_enabled =
+ conn->dom_ctx->config[ENABLE_AUTH_DOMAIN_CHECK]
+ && (!mg_strcasecmp(
+ conn->dom_ctx->config[ENABLE_AUTH_DOMAIN_CHECK], "yes"));
+
+ const char *server_domain =
+ conn->dom_ctx->config[AUTHENTICATION_DOMAIN];
+
+ char portstr[16];
+ char server_ip[48];
+
+ if (port != default_port) {
+ sprintf(portstr, ":%u", (unsigned)port);
+ } else {
+ portstr[0] = 0;
+ }
+
+ if (!auth_domain_check_enabled || !server_domain) {
+
+ sockaddr_to_string(server_ip,
+ sizeof(server_ip),
+ &conn->client.lsa);
+
+ server_domain = server_ip;
+ }
+
+ mg_snprintf(conn,
+ &truncated,
+ buf,
+ buflen,
+#if defined(USE_IPV6)
+ "%s://%s%s%s%s%s",
+ proto,
+ (is_ipv6 && (server_domain == server_ip)) ? "[" : "",
+ server_domain,
+ (is_ipv6 && (server_domain == server_ip)) ? "]" : "",
+#else
+ "%s://%s%s%s",
+ proto,
+ server_domain,
+#endif
+ portstr,
+ uri_encoded);
+
+ mg_free(uri_encoded);
+ if (truncated) {
+ return -1;
+ }
+ return 0;
+ }
+ }
+}
+
+
+CIVETWEB_API int
+mg_get_request_link(const struct mg_connection *conn, char *buf, size_t buflen)
+{
+ return mg_construct_local_link(conn, buf, buflen, NULL, -1, NULL);
+}
+
+
+/* Skip the characters until one of the delimiters characters found.
+ * 0-terminate resulting word. Skip the delimiter and following whitespaces.
+ * Advance pointer to buffer to the next word. Return found 0-terminated
+ * word.
+ * Delimiters can be quoted with quotechar. */
+static char *
+skip_quoted(char **buf,
+ const char *delimiters,
+ const char *whitespace,
+ char quotechar)
+{
+ char *p, *begin_word, *end_word, *end_whitespace;
+
+ begin_word = *buf;
+ end_word = begin_word + strcspn(begin_word, delimiters);
+
+ /* Check for quotechar */
+ if (end_word > begin_word) {
+ p = end_word - 1;
+ while (*p == quotechar) {
+ /* While the delimiter is quoted, look for the next delimiter. */
+ /* This happens, e.g., in calls from parse_auth_header,
+ * if the user name contains a " character. */
+
+ /* If there is anything beyond end_word, copy it. */
+ if (*end_word != '\0') {
+ size_t end_off = strcspn(end_word + 1, delimiters);
+ memmove(p, end_word, end_off + 1);
+ p += end_off; /* p must correspond to end_word - 1 */
+ end_word += end_off + 1;
+ } else {
+ *p = '\0';
+ break;
+ }
+ }
+ for (p++; p < end_word; p++) {
+ *p = '\0';
+ }
+ }
+
+ if (*end_word == '\0') {
+ *buf = end_word;
+ } else {
+
+#if defined(GCC_DIAGNOSTIC)
+ /* Disable spurious conversion warning for GCC */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif /* defined(GCC_DIAGNOSTIC) */
+
+ end_whitespace = end_word + strspn(&end_word[1], whitespace) + 1;
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif /* defined(GCC_DIAGNOSTIC) */
+
+ for (p = end_word; p < end_whitespace; p++) {
+ *p = '\0';
+ }
+
+ *buf = end_whitespace;
+ }
+
+ return begin_word;
+}
+
+
+/* Return HTTP header value, or NULL if not found. */
+static const char *
+get_header(const struct mg_header *hdr, int num_hdr, const char *name)
+{
+ int i;
+ for (i = 0; i < num_hdr; i++) {
+ if (!mg_strcasecmp(name, hdr[i].name)) {
+ return hdr[i].value;
+ }
+ }
+
+ return NULL;
+}
+
+
+/* Retrieve requested HTTP header multiple values, and return the number of
+ * found occurrences */
+static int
+get_req_headers(const struct mg_request_info *ri,
+ const char *name,
+ const char **output,
+ int output_max_size)
+{
+ int i;
+ int cnt = 0;
+ if (ri) {
+ for (i = 0; i < ri->num_headers && cnt < output_max_size; i++) {
+ if (!mg_strcasecmp(name, ri->http_headers[i].name)) {
+ output[cnt++] = ri->http_headers[i].value;
+ }
+ }
+ }
+ return cnt;
+}
+
+
+CIVETWEB_API const char *
+mg_get_header(const struct mg_connection *conn, const char *name)
+{
+ if (!conn) {
+ return NULL;
+ }
+
+ if (conn->connection_type == CONNECTION_TYPE_REQUEST) {
+ return get_header(conn->request_info.http_headers,
+ conn->request_info.num_headers,
+ name);
+ }
+ if (conn->connection_type == CONNECTION_TYPE_RESPONSE) {
+ return get_header(conn->response_info.http_headers,
+ conn->response_info.num_headers,
+ name);
+ }
+ return NULL;
+}
+
+
+static const char *
+get_http_version(const struct mg_connection *conn)
+{
+ if (!conn) {
+ return NULL;
+ }
+
+ if (conn->connection_type == CONNECTION_TYPE_REQUEST) {
+ return conn->request_info.http_version;
+ }
+ if (conn->connection_type == CONNECTION_TYPE_RESPONSE) {
+ return conn->response_info.http_version;
+ }
+ return NULL;
+}
+
+
+/* A helper function for traversing a comma separated list of values.
+ * It returns a list pointer shifted to the next value, or NULL if the end
+ * of the list found.
+ * Value is stored in val vector. If value has form "x=y", then eq_val
+ * vector is initialized to point to the "y" part, and val vector length
+ * is adjusted to point only to "x". */
+static const char *
+next_option(const char *list, struct vec *val, struct vec *eq_val)
+{
+ int end;
+
+reparse:
+ if (val == NULL || list == NULL || *list == '\0') {
+ /* End of the list */
+ return NULL;
+ }
+
+ /* Skip over leading LWS */
+ while (*list == ' ' || *list == '\t')
+ list++;
+
+ val->ptr = list;
+ if ((list = strchr(val->ptr, ',')) != NULL) {
+ /* Comma found. Store length and shift the list ptr */
+ val->len = ((size_t)(list - val->ptr));
+ list++;
+ } else {
+ /* This value is the last one */
+ list = val->ptr + strlen(val->ptr);
+ val->len = ((size_t)(list - val->ptr));
+ }
+
+ /* Adjust length for trailing LWS */
+ end = (int)val->len - 1;
+ while (end >= 0 && ((val->ptr[end] == ' ') || (val->ptr[end] == '\t')))
+ end--;
+ val->len = (size_t)(end) + (size_t)(1);
+
+ if (val->len == 0) {
+ /* Ignore any empty entries. */
+ goto reparse;
+ }
+
+ if (eq_val != NULL) {
+ /* Value has form "x=y", adjust pointers and lengths
+ * so that val points to "x", and eq_val points to "y". */
+ eq_val->len = 0;
+ eq_val->ptr = (const char *)memchr(val->ptr, '=', val->len);
+ if (eq_val->ptr != NULL) {
+ eq_val->ptr++; /* Skip over '=' character */
+ eq_val->len = ((size_t)(val->ptr - eq_val->ptr)) + val->len;
+ val->len = ((size_t)(eq_val->ptr - val->ptr)) - 1;
+ }
+ }
+
+ return list;
+}
+
+
+/* A helper function for checking if a comma separated list of values
+ * contains
+ * the given option (case insensitvely).
+ * 'header' can be NULL, in which case false is returned. */
+static int
+header_has_option(const char *header, const char *option)
+{
+ struct vec opt_vec;
+ struct vec eq_vec;
+
+ DEBUG_ASSERT(option != NULL);
+ DEBUG_ASSERT(option[0] != '\0');
+
+ while ((header = next_option(header, &opt_vec, &eq_vec)) != NULL) {
+ if (mg_strncasecmp(option, opt_vec.ptr, opt_vec.len) == 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+
+/* Sorting function implemented in a separate file */
+#include "sort.inl"
+
+/* Pattern matching has been reimplemented in a new file */
+#include "match.inl"
+
+
+/* HTTP 1.1 assumes keep alive if "Connection:" header is not set
+ * This function must tolerate situations when connection info is not
+ * set up, for example if request parsing failed. */
+static int
+should_keep_alive(const struct mg_connection *conn)
+{
+ const char *http_version;
+ const char *header;
+
+ /* First satisfy needs of the server */
+ if ((conn == NULL) || conn->must_close) {
+ /* Close, if civetweb framework needs to close */
+ return 0;
+ }
+
+ if (mg_strcasecmp(conn->dom_ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0) {
+ /* Close, if keep alive is not enabled */
+ return 0;
+ }
+
+ /* Check explicit wish of the client */
+ header = mg_get_header(conn, "Connection");
+ if (header) {
+ /* If there is a connection header from the client, obey */
+ if (header_has_option(header, "keep-alive")) {
+ return 1;
+ }
+ return 0;
+ }
+
+ /* Use default of the standard */
+ http_version = get_http_version(conn);
+ if (http_version && (0 == strcmp(http_version, "1.1"))) {
+ /* HTTP 1.1 default is keep alive */
+ return 1;
+ }
+
+ /* HTTP 1.0 (and earlier) default is to close the connection */
+ return 0;
+}
+
+
+static int
+should_decode_url(const struct mg_connection *conn)
+{
+ if (!conn || !conn->dom_ctx) {
+ return 0;
+ }
+
+ return (mg_strcasecmp(conn->dom_ctx->config[DECODE_URL], "yes") == 0);
+}
+
+
+static int
+should_decode_query_string(const struct mg_connection *conn)
+{
+ if (!conn || !conn->dom_ctx) {
+ return 0;
+ }
+
+ return (mg_strcasecmp(conn->dom_ctx->config[DECODE_QUERY_STRING], "yes")
+ == 0);
+}
+
+
+static const char *
+suggest_connection_header(const struct mg_connection *conn)
+{
+ return should_keep_alive(conn) ? "keep-alive" : "close";
+}
+
+
+#include "response.inl"
+
+
+static void
+send_no_cache_header(struct mg_connection *conn)
+{
+ /* Send all current and obsolete cache opt-out directives. */
+ mg_response_header_add(conn,
+ "Cache-Control",
+ "no-cache, no-store, "
+ "must-revalidate, private, max-age=0",
+ -1);
+ mg_response_header_add(conn, "Expires", "0", -1);
+
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP1) {
+ /* Obsolete, but still send it for HTTP/1.0 */
+ mg_response_header_add(conn, "Pragma", "no-cache", -1);
+ }
+}
+
+
+static void
+send_static_cache_header(struct mg_connection *conn)
+{
+#if !defined(NO_CACHING)
+ int max_age;
+ char val[64];
+
+ const char *cache_control =
+ conn->dom_ctx->config[STATIC_FILE_CACHE_CONTROL];
+
+ /* If there is a full cache-control option configured,0 use it */
+ if (cache_control != NULL) {
+ mg_response_header_add(conn, "Cache-Control", cache_control, -1);
+ return;
+ }
+
+ /* Read the server config to check how long a file may be cached.
+ * The configuration is in seconds. */
+ max_age = atoi(conn->dom_ctx->config[STATIC_FILE_MAX_AGE]);
+ if (max_age <= 0) {
+ /* 0 means "do not cache". All values <0 are reserved
+ * and may be used differently in the future. */
+ /* If a file should not be cached, do not only send
+ * max-age=0, but also pragmas and Expires headers. */
+ send_no_cache_header(conn);
+ return;
+ }
+
+ /* Use "Cache-Control: max-age" instead of "Expires" header.
+ * Reason: see https://www.mnot.net/blog/2007/05/15/expires_max-age */
+ /* See also https://www.mnot.net/cache_docs/ */
+ /* According to RFC 2616, Section 14.21, caching times should not exceed
+ * one year. A year with 365 days corresponds to 31536000 seconds, a
+ * leap
+ * year to 31622400 seconds. For the moment, we just send whatever has
+ * been configured, still the behavior for >1 year should be considered
+ * as undefined. */
+ mg_snprintf(
+ conn, NULL, val, sizeof(val), "max-age=%lu", (unsigned long)max_age);
+ mg_response_header_add(conn, "Cache-Control", val, -1);
+
+#else /* NO_CACHING */
+
+ send_no_cache_header(conn);
+#endif /* !NO_CACHING */
+}
+
+
+static void
+send_additional_header(struct mg_connection *conn)
+{
+ const char *header = conn->dom_ctx->config[ADDITIONAL_HEADER];
+
+#if !defined(NO_SSL)
+ if (conn->dom_ctx->config[STRICT_HTTPS_MAX_AGE]) {
+ long max_age = atol(conn->dom_ctx->config[STRICT_HTTPS_MAX_AGE]);
+ if (max_age >= 0) {
+ char val[64];
+ mg_snprintf(conn,
+ NULL,
+ val,
+ sizeof(val),
+ "max-age=%lu",
+ (unsigned long)max_age);
+ mg_response_header_add(conn, "Strict-Transport-Security", val, -1);
+ }
+ }
+#endif
+
+ if (header && header[0]) {
+ mg_response_header_add_lines(conn, header);
+ }
+}
+
+
+static void
+send_cors_header(struct mg_connection *conn)
+{
+ const char *origin_hdr = mg_get_header(conn, "Origin");
+ const char *cors_orig_cfg =
+ conn->dom_ctx->config[ACCESS_CONTROL_ALLOW_ORIGIN];
+
+ if (cors_orig_cfg && *cors_orig_cfg && origin_hdr && *origin_hdr) {
+ /* Cross-origin resource sharing (CORS), see
+ * http://www.html5rocks.com/en/tutorials/cors/,
+ * http://www.html5rocks.com/static/images/cors_server_flowchart.png
+ * CORS preflight is not supported for files. */
+ mg_response_header_add(conn,
+ "Access-Control-Allow-Origin",
+ cors_orig_cfg,
+ -1);
+ }
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+static void handle_file_based_request(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *filep);
+#endif /* NO_FILESYSTEMS */
+
+
+CIVETWEB_API const char *
+mg_get_response_code_text(const struct mg_connection *conn, int response_code)
+{
+ /* See IANA HTTP status code assignment:
+ * http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
+ */
+
+ switch (response_code) {
+ /* RFC2616 Section 10.1 - Informational 1xx */
+ case 100:
+ return "Continue"; /* RFC2616 Section 10.1.1 */
+ case 101:
+ return "Switching Protocols"; /* RFC2616 Section 10.1.2 */
+ case 102:
+ return "Processing"; /* RFC2518 Section 10.1 */
+
+ /* RFC2616 Section 10.2 - Successful 2xx */
+ case 200:
+ return "OK"; /* RFC2616 Section 10.2.1 */
+ case 201:
+ return "Created"; /* RFC2616 Section 10.2.2 */
+ case 202:
+ return "Accepted"; /* RFC2616 Section 10.2.3 */
+ case 203:
+ return "Non-Authoritative Information"; /* RFC2616 Section 10.2.4 */
+ case 204:
+ return "No Content"; /* RFC2616 Section 10.2.5 */
+ case 205:
+ return "Reset Content"; /* RFC2616 Section 10.2.6 */
+ case 206:
+ return "Partial Content"; /* RFC2616 Section 10.2.7 */
+ case 207:
+ return "Multi-Status"; /* RFC2518 Section 10.2, RFC4918 Section 11.1
+ */
+ case 208:
+ return "Already Reported"; /* RFC5842 Section 7.1 */
+
+ case 226:
+ return "IM used"; /* RFC3229 Section 10.4.1 */
+
+ /* RFC2616 Section 10.3 - Redirection 3xx */
+ case 300:
+ return "Multiple Choices"; /* RFC2616 Section 10.3.1 */
+ case 301:
+ return "Moved Permanently"; /* RFC2616 Section 10.3.2 */
+ case 302:
+ return "Found"; /* RFC2616 Section 10.3.3 */
+ case 303:
+ return "See Other"; /* RFC2616 Section 10.3.4 */
+ case 304:
+ return "Not Modified"; /* RFC2616 Section 10.3.5 */
+ case 305:
+ return "Use Proxy"; /* RFC2616 Section 10.3.6 */
+ case 307:
+ return "Temporary Redirect"; /* RFC2616 Section 10.3.8 */
+ case 308:
+ return "Permanent Redirect"; /* RFC7238 Section 3 */
+
+ /* RFC2616 Section 10.4 - Client Error 4xx */
+ case 400:
+ return "Bad Request"; /* RFC2616 Section 10.4.1 */
+ case 401:
+ return "Unauthorized"; /* RFC2616 Section 10.4.2 */
+ case 402:
+ return "Payment Required"; /* RFC2616 Section 10.4.3 */
+ case 403:
+ return "Forbidden"; /* RFC2616 Section 10.4.4 */
+ case 404:
+ return "Not Found"; /* RFC2616 Section 10.4.5 */
+ case 405:
+ return "Method Not Allowed"; /* RFC2616 Section 10.4.6 */
+ case 406:
+ return "Not Acceptable"; /* RFC2616 Section 10.4.7 */
+ case 407:
+ return "Proxy Authentication Required"; /* RFC2616 Section 10.4.8 */
+ case 408:
+ return "Request Time-out"; /* RFC2616 Section 10.4.9 */
+ case 409:
+ return "Conflict"; /* RFC2616 Section 10.4.10 */
+ case 410:
+ return "Gone"; /* RFC2616 Section 10.4.11 */
+ case 411:
+ return "Length Required"; /* RFC2616 Section 10.4.12 */
+ case 412:
+ return "Precondition Failed"; /* RFC2616 Section 10.4.13 */
+ case 413:
+ return "Request Entity Too Large"; /* RFC2616 Section 10.4.14 */
+ case 414:
+ return "Request-URI Too Large"; /* RFC2616 Section 10.4.15 */
+ case 415:
+ return "Unsupported Media Type"; /* RFC2616 Section 10.4.16 */
+ case 416:
+ return "Requested range not satisfiable"; /* RFC2616 Section 10.4.17
+ */
+ case 417:
+ return "Expectation Failed"; /* RFC2616 Section 10.4.18 */
+
+ case 421:
+ return "Misdirected Request"; /* RFC7540 Section 9.1.2 */
+ case 422:
+ return "Unproccessable entity"; /* RFC2518 Section 10.3, RFC4918
+ * Section 11.2 */
+ case 423:
+ return "Locked"; /* RFC2518 Section 10.4, RFC4918 Section 11.3 */
+ case 424:
+ return "Failed Dependency"; /* RFC2518 Section 10.5, RFC4918
+ * Section 11.4 */
+
+ case 426:
+ return "Upgrade Required"; /* RFC 2817 Section 4 */
+
+ case 428:
+ return "Precondition Required"; /* RFC 6585, Section 3 */
+ case 429:
+ return "Too Many Requests"; /* RFC 6585, Section 4 */
+
+ case 431:
+ return "Request Header Fields Too Large"; /* RFC 6585, Section 5 */
+
+ case 451:
+ return "Unavailable For Legal Reasons"; /* draft-tbray-http-legally-restricted-status-05,
+ * Section 3 */
+
+ /* RFC2616 Section 10.5 - Server Error 5xx */
+ case 500:
+ return "Internal Server Error"; /* RFC2616 Section 10.5.1 */
+ case 501:
+ return "Not Implemented"; /* RFC2616 Section 10.5.2 */
+ case 502:
+ return "Bad Gateway"; /* RFC2616 Section 10.5.3 */
+ case 503:
+ return "Service Unavailable"; /* RFC2616 Section 10.5.4 */
+ case 504:
+ return "Gateway Time-out"; /* RFC2616 Section 10.5.5 */
+ case 505:
+ return "HTTP Version not supported"; /* RFC2616 Section 10.5.6 */
+ case 506:
+ return "Variant Also Negotiates"; /* RFC 2295, Section 8.1 */
+ case 507:
+ return "Insufficient Storage"; /* RFC2518 Section 10.6, RFC4918
+ * Section 11.5 */
+ case 508:
+ return "Loop Detected"; /* RFC5842 Section 7.1 */
+
+ case 510:
+ return "Not Extended"; /* RFC 2774, Section 7 */
+ case 511:
+ return "Network Authentication Required"; /* RFC 6585, Section 6 */
+
+ /* Other status codes, not shown in the IANA HTTP status code
+ * assignment.
+ * E.g., "de facto" standards due to common use, ... */
+ case 418:
+ return "I am a teapot"; /* RFC2324 Section 2.3.2 */
+ case 419:
+ return "Authentication Timeout"; /* common use */
+ case 420:
+ return "Enhance Your Calm"; /* common use */
+ case 440:
+ return "Login Timeout"; /* common use */
+ case 509:
+ return "Bandwidth Limit Exceeded"; /* common use */
+
+ default:
+ /* This error code is unknown. This should not happen. */
+ if (conn) {
+ mg_cry_internal(conn,
+ "Unknown HTTP response code: %u",
+ response_code);
+ }
+
+ /* Return at least a category according to RFC 2616 Section 10. */
+ if (response_code >= 100 && response_code < 200) {
+ /* Unknown informational status code */
+ return "Information";
+ }
+ if (response_code >= 200 && response_code < 300) {
+ /* Unknown success code */
+ return "Success";
+ }
+ if (response_code >= 300 && response_code < 400) {
+ /* Unknown redirection code */
+ return "Redirection";
+ }
+ if (response_code >= 400 && response_code < 500) {
+ /* Unknown request error code */
+ return "Client Error";
+ }
+ if (response_code >= 500 && response_code < 600) {
+ /* Unknown server error code */
+ return "Server Error";
+ }
+
+ /* Response code not even within reasonable range */
+ return "";
+ }
+}
+
+
+static int
+mg_send_http_error_impl(struct mg_connection *conn,
+ int status,
+ const char *fmt,
+ va_list args)
+{
+ char errmsg_buf[MG_BUF_LEN];
+ va_list ap;
+ int has_body;
+
+#if !defined(NO_FILESYSTEMS)
+ char path_buf[UTF8_PATH_MAX];
+ int len, i, page_handler_found, scope, truncated;
+ const char *error_handler = NULL;
+ struct mg_file error_page_file = STRUCT_FILE_INITIALIZER;
+ const char *error_page_file_ext, *tstr;
+#endif /* NO_FILESYSTEMS */
+ int handled_by_callback = 0;
+
+ if ((conn == NULL) || (fmt == NULL)) {
+ return -2;
+ }
+
+ /* Set status (for log) */
+ conn->status_code = status;
+
+ /* Errors 1xx, 204 and 304 MUST NOT send a body */
+ has_body = ((status > 199) && (status != 204) && (status != 304));
+
+ /* Prepare message in buf, if required */
+ if (has_body
+ || (!conn->in_error_handler
+ && (conn->phys_ctx->callbacks.http_error != NULL))) {
+ /* Store error message in errmsg_buf */
+ va_copy(ap, args);
+ mg_vsnprintf(conn, NULL, errmsg_buf, sizeof(errmsg_buf), fmt, ap);
+ va_end(ap);
+ /* In a debug build, print all html errors */
+ DEBUG_TRACE("Error %i - [%s]", status, errmsg_buf);
+ }
+
+ /* If there is a http_error callback, call it.
+ * But don't do it recursively, if callback calls mg_send_http_error again.
+ */
+ if (!conn->in_error_handler
+ && (conn->phys_ctx->callbacks.http_error != NULL)) {
+ /* Mark in_error_handler to avoid recursion and call user callback. */
+ conn->in_error_handler = 1;
+ handled_by_callback =
+ (conn->phys_ctx->callbacks.http_error(conn, status, errmsg_buf)
+ == 0);
+ conn->in_error_handler = 0;
+ }
+
+ if (!handled_by_callback) {
+ /* Check for recursion */
+ if (conn->in_error_handler) {
+ DEBUG_TRACE(
+ "Recursion when handling error %u - fall back to default",
+ status);
+#if !defined(NO_FILESYSTEMS)
+ } else {
+ /* Send user defined error pages, if defined */
+ error_handler = conn->dom_ctx->config[ERROR_PAGES];
+ error_page_file_ext = conn->dom_ctx->config[INDEX_FILES];
+ page_handler_found = 0;
+
+ if (error_handler != NULL) {
+ for (scope = 1; (scope <= 3) && !page_handler_found; scope++) {
+ switch (scope) {
+ case 1: /* Handler for specific error, e.g. 404 error */
+ mg_snprintf(conn,
+ &truncated,
+ path_buf,
+ sizeof(path_buf) - 32,
+ "%serror%03u.",
+ error_handler,
+ status);
+ break;
+ case 2: /* Handler for error group, e.g., 5xx error
+ * handler
+ * for all server errors (500-599) */
+ mg_snprintf(conn,
+ &truncated,
+ path_buf,
+ sizeof(path_buf) - 32,
+ "%serror%01uxx.",
+ error_handler,
+ status / 100);
+ break;
+ default: /* Handler for all errors */
+ mg_snprintf(conn,
+ &truncated,
+ path_buf,
+ sizeof(path_buf) - 32,
+ "%serror.",
+ error_handler);
+ break;
+ }
+
+ /* String truncation in buf may only occur if
+ * error_handler is too long. This string is
+ * from the config, not from a client. */
+ (void)truncated;
+
+ /* The following code is redundant, but it should avoid
+ * false positives in static source code analyzers and
+ * vulnerability scanners.
+ */
+ path_buf[sizeof(path_buf) - 32] = 0;
+ len = (int)strlen(path_buf);
+ if (len > (int)sizeof(path_buf) - 32) {
+ len = (int)sizeof(path_buf) - 32;
+ }
+
+ /* Start with the file extension from the configuration. */
+ tstr = strchr(error_page_file_ext, '.');
+
+ while (tstr) {
+ for (i = 1;
+ (i < 32) && (tstr[i] != 0) && (tstr[i] != ',');
+ i++) {
+ /* buffer overrun is not possible here, since
+ * (i < 32) && (len < sizeof(path_buf) - 32)
+ * ==> (i + len) < sizeof(path_buf) */
+ path_buf[len + i - 1] = tstr[i];
+ }
+ /* buffer overrun is not possible here, since
+ * (i <= 32) && (len < sizeof(path_buf) - 32)
+ * ==> (i + len) <= sizeof(path_buf) */
+ path_buf[len + i - 1] = 0;
+
+ if (mg_stat(conn, path_buf, &error_page_file.stat)) {
+ DEBUG_TRACE("Check error page %s - found",
+ path_buf);
+ page_handler_found = 1;
+ break;
+ }
+ DEBUG_TRACE("Check error page %s - not found",
+ path_buf);
+
+ /* Continue with the next file extension from the
+ * configuration (if there is a next one). */
+ tstr = strchr(tstr + i, '.');
+ }
+ }
+ }
+
+ if (page_handler_found) {
+ conn->in_error_handler = 1;
+ handle_file_based_request(conn, path_buf, &error_page_file);
+ conn->in_error_handler = 0;
+ return 0;
+ }
+#endif /* NO_FILESYSTEMS */
+ }
+
+ /* No custom error page. Send default error page. */
+ conn->must_close = 1;
+ mg_response_header_start(conn, status);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ send_cors_header(conn);
+ if (has_body) {
+ mg_response_header_add(conn,
+ "Content-Type",
+ "text/plain; charset=utf-8",
+ -1);
+ }
+ mg_response_header_send(conn);
+
+ /* HTTP responses 1xx, 204 and 304 MUST NOT send a body */
+ if (has_body) {
+ /* For other errors, send a generic error message. */
+ const char *status_text = mg_get_response_code_text(conn, status);
+ mg_printf(conn, "Error %d: %s\n", status, status_text);
+ mg_write(conn, errmsg_buf, strlen(errmsg_buf));
+
+ } else {
+ /* No body allowed. Close the connection. */
+ DEBUG_TRACE("Error %i", status);
+ }
+ }
+ return 0;
+}
+
+
+CIVETWEB_API int
+mg_send_http_error(struct mg_connection *conn, int status, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, fmt);
+ ret = mg_send_http_error_impl(conn, status, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+
+CIVETWEB_API int
+mg_send_http_ok(struct mg_connection *conn,
+ const char *mime_type,
+ long long content_length)
+{
+ if ((mime_type == NULL) || (*mime_type == 0)) {
+ /* No content type defined: default to text/html */
+ mime_type = "text/html";
+ }
+
+ mg_response_header_start(conn, 200);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ send_cors_header(conn);
+ mg_response_header_add(conn, "Content-Type", mime_type, -1);
+ if (content_length < 0) {
+ /* Size not known. Use chunked encoding (HTTP/1.x) */
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP1) {
+ /* Only HTTP/1.x defines "chunked" encoding, HTTP/2 does not*/
+ mg_response_header_add(conn, "Transfer-Encoding", "chunked", -1);
+ }
+ } else {
+ char len[32];
+ int trunc = 0;
+ mg_snprintf(conn,
+ &trunc,
+ len,
+ sizeof(len),
+ "%" UINT64_FMT,
+ (uint64_t)content_length);
+ if (!trunc) {
+ /* Since 32 bytes is enough to hold any 64 bit decimal number,
+ * !trunc is always true */
+ mg_response_header_add(conn, "Content-Length", len, -1);
+ }
+ }
+ mg_response_header_send(conn);
+
+ return 0;
+}
+
+
+CIVETWEB_API int
+mg_send_http_redirect(struct mg_connection *conn,
+ const char *target_url,
+ int redirect_code)
+{
+ /* Send a 30x redirect response.
+ *
+ * Redirect types (status codes):
+ *
+ * Status | Perm/Temp | Method | Version
+ * 301 | permanent | POST->GET undefined | HTTP/1.0
+ * 302 | temporary | POST->GET undefined | HTTP/1.0
+ * 303 | temporary | always use GET | HTTP/1.1
+ * 307 | temporary | always keep method | HTTP/1.1
+ * 308 | permanent | always keep method | HTTP/1.1
+ */
+
+#if defined(MG_SEND_REDIRECT_BODY)
+ char redirect_body[MG_BUF_LEN];
+ size_t content_len = 0;
+ char content_len_text[32];
+#endif
+
+ /* In case redirect_code=0, use 307. */
+ if (redirect_code == 0) {
+ redirect_code = 307;
+ }
+
+ /* In case redirect_code is none of the above, return error. */
+ if ((redirect_code != 301) && (redirect_code != 302)
+ && (redirect_code != 303) && (redirect_code != 307)
+ && (redirect_code != 308)) {
+ /* Parameter error */
+ return -2;
+ }
+
+ /* If target_url is not defined, redirect to "/". */
+ if ((target_url == NULL) || (*target_url == 0)) {
+ target_url = "/";
+ }
+
+#if defined(MG_SEND_REDIRECT_BODY)
+ /* TODO: condition name? */
+
+ /* Prepare a response body with a hyperlink.
+ *
+ * According to RFC2616 (and RFC1945 before):
+ * Unless the request method was HEAD, the entity of the
+ * response SHOULD contain a short hypertext note with a hyperlink to
+ * the new URI(s).
+ *
+ * However, this response body is not useful in M2M communication.
+ * Probably the original reason in the RFC was, clients not supporting
+ * a 30x HTTP redirect could still show the HTML page and let the user
+ * press the link. Since current browsers support 30x HTTP, the additional
+ * HTML body does not seem to make sense anymore.
+ *
+ * The new RFC7231 (Section 6.4) does no longer recommend it ("SHOULD"),
+ * but it only notes:
+ * The server's response payload usually contains a short
+ * hypertext note with a hyperlink to the new URI(s).
+ *
+ * Deactivated by default. If you need the 30x body, set the define.
+ */
+ mg_snprintf(
+ conn,
+ NULL /* ignore truncation */,
+ redirect_body,
+ sizeof(redirect_body),
+ "<html><head>%s</head><body><a href=\"%s\">%s</a></body></html>",
+ redirect_text,
+ target_url,
+ target_url);
+ content_len = strlen(reply);
+ sprintf(content_len_text, "%lu", (unsigned long)content_len);
+#endif
+
+ /* Send all required headers */
+ mg_response_header_start(conn, redirect_code);
+ mg_response_header_add(conn, "Location", target_url, -1);
+ if ((redirect_code == 301) || (redirect_code == 308)) {
+ /* Permanent redirect */
+ send_static_cache_header(conn);
+ } else {
+ /* Temporary redirect */
+ send_no_cache_header(conn);
+ }
+ send_additional_header(conn);
+ send_cors_header(conn);
+#if defined(MG_SEND_REDIRECT_BODY)
+ mg_response_header_add(conn, "Content-Type", "text/html", -1);
+ mg_response_header_add(conn, "Content-Length", content_len_text, -1);
+#else
+ mg_response_header_add(conn, "Content-Length", "0", 1);
+#endif
+ mg_response_header_send(conn);
+
+#if defined(MG_SEND_REDIRECT_BODY)
+ /* Send response body */
+ /* ... unless it is a HEAD request */
+ if (0 != strcmp(conn->request_info.request_method, "HEAD")) {
+ ret = mg_write(conn, redirect_body, content_len);
+ }
+#endif
+
+ return 1;
+}
+
+
+#if defined(_WIN32)
+/* Create substitutes for POSIX functions in Win32. */
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
+
+static int
+pthread_mutex_init(pthread_mutex_t *mutex, void *unused)
+{
+ (void)unused;
+ /* Always initialize as PTHREAD_MUTEX_RECURSIVE */
+ InitializeCriticalSection(&mutex->sec);
+ return 0;
+}
+
+
+static int
+pthread_mutex_destroy(pthread_mutex_t *mutex)
+{
+ DeleteCriticalSection(&mutex->sec);
+ return 0;
+}
+
+
+static int
+pthread_mutex_lock(pthread_mutex_t *mutex)
+{
+ EnterCriticalSection(&mutex->sec);
+ return 0;
+}
+
+
+static int
+pthread_mutex_unlock(pthread_mutex_t *mutex)
+{
+ LeaveCriticalSection(&mutex->sec);
+ return 0;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_init(pthread_cond_t *cv, const void *unused)
+{
+ (void)unused;
+ (void)pthread_mutex_init(&cv->threadIdSec, &pthread_mutex_attr);
+ cv->waiting_thread = NULL;
+ return 0;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_timedwait(pthread_cond_t *cv,
+ pthread_mutex_t *mutex,
+ FUNCTION_MAY_BE_UNUSED const struct timespec *abstime)
+{
+ struct mg_workerTLS **ptls,
+ *tls = (struct mg_workerTLS *)pthread_getspecific(sTlsKey);
+ int ok;
+ uint64_t nsnow, nswaitabs;
+ int64_t nswaitrel;
+ DWORD mswaitrel;
+
+ pthread_mutex_lock(&cv->threadIdSec);
+ /* Add this thread to cv's waiting list */
+ ptls = &cv->waiting_thread;
+ for (; *ptls != NULL; ptls = &(*ptls)->next_waiting_thread)
+ ;
+ tls->next_waiting_thread = NULL;
+ *ptls = tls;
+ pthread_mutex_unlock(&cv->threadIdSec);
+
+ if (abstime) {
+ nsnow = mg_get_current_time_ns();
+ nswaitabs =
+ (((uint64_t)abstime->tv_sec) * 1000000000) + abstime->tv_nsec;
+ nswaitrel = nswaitabs - nsnow;
+ if (nswaitrel < 0) {
+ nswaitrel = 0;
+ }
+ mswaitrel = (DWORD)(nswaitrel / 1000000);
+ } else {
+ mswaitrel = (DWORD)INFINITE;
+ }
+
+ pthread_mutex_unlock(mutex);
+ ok = (WAIT_OBJECT_0
+ == WaitForSingleObject(tls->pthread_cond_helper_mutex, mswaitrel));
+ if (!ok) {
+ ok = 1;
+ pthread_mutex_lock(&cv->threadIdSec);
+ ptls = &cv->waiting_thread;
+ for (; *ptls != NULL; ptls = &(*ptls)->next_waiting_thread) {
+ if (*ptls == tls) {
+ *ptls = tls->next_waiting_thread;
+ ok = 0;
+ break;
+ }
+ }
+ pthread_mutex_unlock(&cv->threadIdSec);
+ if (ok) {
+ WaitForSingleObject(tls->pthread_cond_helper_mutex,
+ (DWORD)INFINITE);
+ }
+ }
+ /* This thread has been removed from cv's waiting list */
+ pthread_mutex_lock(mutex);
+
+ return ok ? 0 : -1;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex)
+{
+ return pthread_cond_timedwait(cv, mutex, NULL);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_signal(pthread_cond_t *cv)
+{
+ HANDLE wkup = NULL;
+ BOOL ok = FALSE;
+
+ pthread_mutex_lock(&cv->threadIdSec);
+ if (cv->waiting_thread) {
+ wkup = cv->waiting_thread->pthread_cond_helper_mutex;
+ cv->waiting_thread = cv->waiting_thread->next_waiting_thread;
+
+ ok = SetEvent(wkup);
+ DEBUG_ASSERT(ok);
+ }
+ pthread_mutex_unlock(&cv->threadIdSec);
+
+ return ok ? 0 : 1;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_broadcast(pthread_cond_t *cv)
+{
+ pthread_mutex_lock(&cv->threadIdSec);
+ while (cv->waiting_thread) {
+ pthread_cond_signal(cv);
+ }
+ pthread_mutex_unlock(&cv->threadIdSec);
+
+ return 0;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+pthread_cond_destroy(pthread_cond_t *cv)
+{
+ pthread_mutex_lock(&cv->threadIdSec);
+ DEBUG_ASSERT(cv->waiting_thread == NULL);
+ pthread_mutex_unlock(&cv->threadIdSec);
+ pthread_mutex_destroy(&cv->threadIdSec);
+
+ return 0;
+}
+
+
+#if defined(ALTERNATIVE_QUEUE)
+FUNCTION_MAY_BE_UNUSED
+static void *
+event_create(void)
+{
+ return (void *)CreateEvent(NULL, FALSE, FALSE, NULL);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+event_wait(void *eventhdl)
+{
+ int res = WaitForSingleObject((HANDLE)eventhdl, (DWORD)INFINITE);
+ return (res == WAIT_OBJECT_0);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+event_signal(void *eventhdl)
+{
+ return (int)SetEvent((HANDLE)eventhdl);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static void
+event_destroy(void *eventhdl)
+{
+ CloseHandle((HANDLE)eventhdl);
+}
+#endif
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Enable unused function warning again */
+#pragma GCC diagnostic pop
+#endif
+
+
+/* For Windows, change all slashes to backslashes in path names. */
+static void
+change_slashes_to_backslashes(char *path)
+{
+ int i;
+
+ for (i = 0; path[i] != '\0'; i++) {
+ if (path[i] == '/') {
+ path[i] = '\\';
+ }
+
+ /* remove double backslash (check i > 0 to preserve UNC paths,
+ * like \\server\file.txt) */
+ if ((i > 0) && (path[i] == '\\')) {
+ while ((path[i + 1] == '\\') || (path[i + 1] == '/')) {
+ (void)memmove(path + i + 1, path + i + 2, strlen(path + i + 1));
+ }
+ }
+ }
+}
+
+
+static int
+mg_wcscasecmp(const wchar_t *s1, const wchar_t *s2)
+{
+ int diff;
+
+ do {
+ diff = ((*s1 >= L'A') && (*s1 <= L'Z') ? (*s1 - L'A' + L'a') : *s1)
+ - ((*s2 >= L'A') && (*s2 <= L'Z') ? (*s2 - L'A' + L'a') : *s2);
+ s1++;
+ s2++;
+ } while ((diff == 0) && (s1[-1] != L'\0'));
+
+ return diff;
+}
+
+
+/* Encode 'path' which is assumed UTF-8 string, into UNICODE string.
+ * wbuf and wbuf_len is a target buffer and its length. */
+static void
+path_to_unicode(const struct mg_connection *conn,
+ const char *path,
+ wchar_t *wbuf,
+ size_t wbuf_len)
+{
+ char buf[UTF8_PATH_MAX], buf2[UTF8_PATH_MAX];
+ wchar_t wbuf2[UTF16_PATH_MAX + 1];
+ DWORD long_len, err;
+ int (*fcompare)(const wchar_t *, const wchar_t *) = mg_wcscasecmp;
+
+ mg_strlcpy(buf, path, sizeof(buf));
+ change_slashes_to_backslashes(buf);
+
+ /* Convert to Unicode and back. If doubly-converted string does not
+ * match the original, something is fishy, reject. */
+ memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
+ MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int)wbuf_len);
+ WideCharToMultiByte(
+ CP_UTF8, 0, wbuf, (int)wbuf_len, buf2, sizeof(buf2), NULL, NULL);
+ if (strcmp(buf, buf2) != 0) {
+ wbuf[0] = L'\0';
+ }
+
+ /* Windows file systems are not case sensitive, but you can still use
+ * uppercase and lowercase letters (on all modern file systems).
+ * The server can check if the URI uses the same upper/lowercase
+ * letters an the file system, effectively making Windows servers
+ * case sensitive (like Linux servers are). It is still not possible
+ * to use two files with the same name in different cases on Windows
+ * (like /a and /A) - this would be possible in Linux.
+ * As a default, Windows is not case sensitive, but the case sensitive
+ * file name check can be activated by an additional configuration. */
+ if (conn) {
+ if (conn->dom_ctx->config[CASE_SENSITIVE_FILES]
+ && !mg_strcasecmp(conn->dom_ctx->config[CASE_SENSITIVE_FILES],
+ "yes")) {
+ /* Use case sensitive compare function */
+ fcompare = wcscmp;
+ }
+ }
+ (void)conn; /* conn is currently unused */
+
+ /* Only accept a full file path, not a Windows short (8.3) path. */
+ memset(wbuf2, 0, ARRAY_SIZE(wbuf2) * sizeof(wchar_t));
+ long_len = GetLongPathNameW(wbuf, wbuf2, ARRAY_SIZE(wbuf2) - 1);
+ if (long_len == 0) {
+ err = GetLastError();
+ if (err == ERROR_FILE_NOT_FOUND) {
+ /* File does not exist. This is not always a problem here. */
+ return;
+ }
+ }
+ if ((long_len >= ARRAY_SIZE(wbuf2)) || (fcompare(wbuf, wbuf2) != 0)) {
+ /* Short name is used. */
+ wbuf[0] = L'\0';
+ }
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+/* Get file information, return 1 if file exists, 0 if not */
+static int
+mg_stat(const struct mg_connection *conn,
+ const char *path,
+ struct mg_file_stat *filep)
+{
+ wchar_t wbuf[UTF16_PATH_MAX];
+ WIN32_FILE_ATTRIBUTE_DATA info;
+ time_t creation_time;
+ size_t len;
+
+ if (!filep) {
+ return 0;
+ }
+ memset(filep, 0, sizeof(*filep));
+
+ if (mg_path_suspicious(conn, path)) {
+ return 0;
+ }
+
+ path_to_unicode(conn, path, wbuf, ARRAY_SIZE(wbuf));
+ /* Windows happily opens files with some garbage at the end of file name.
+ * For example, fopen("a.cgi ", "r") on Windows successfully opens
+ * "a.cgi", despite one would expect an error back. */
+ len = strlen(path);
+ if ((len > 0) && (path[len - 1] != ' ') && (path[len - 1] != '.')
+ && (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0)) {
+ filep->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
+ filep->last_modified =
+ SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
+ info.ftLastWriteTime.dwHighDateTime);
+
+ /* On Windows, the file creation time can be higher than the
+ * modification time, e.g. when a file is copied.
+ * Since the Last-Modified timestamp is used for caching
+ * it should be based on the most recent timestamp. */
+ creation_time = SYS2UNIX_TIME(info.ftCreationTime.dwLowDateTime,
+ info.ftCreationTime.dwHighDateTime);
+ if (creation_time > filep->last_modified) {
+ filep->last_modified = creation_time;
+ }
+
+ filep->is_directory = info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+
+static int
+mg_remove(const struct mg_connection *conn, const char *path)
+{
+ wchar_t wbuf[UTF16_PATH_MAX];
+ path_to_unicode(conn, path, wbuf, ARRAY_SIZE(wbuf));
+ return DeleteFileW(wbuf) ? 0 : -1;
+}
+
+
+static int
+mg_mkdir(const struct mg_connection *conn, const char *path, int mode)
+{
+ wchar_t wbuf[UTF16_PATH_MAX];
+ (void)mode;
+ path_to_unicode(conn, path, wbuf, ARRAY_SIZE(wbuf));
+ return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
+}
+
+
+/* Create substitutes for POSIX functions in Win32. */
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
+
+/* Implementation of POSIX opendir/closedir/readdir for Windows. */
+FUNCTION_MAY_BE_UNUSED
+static DIR *
+mg_opendir(const struct mg_connection *conn, const char *name)
+{
+ DIR *dir = NULL;
+ wchar_t wpath[UTF16_PATH_MAX];
+ DWORD attrs;
+
+ if (name == NULL) {
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ } else if ((dir = (DIR *)mg_malloc(sizeof(*dir))) == NULL) {
+ SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ } else {
+ path_to_unicode(conn, name, wpath, ARRAY_SIZE(wpath));
+ attrs = GetFileAttributesW(wpath);
+ if ((wcslen(wpath) + 2 < ARRAY_SIZE(wpath)) && (attrs != 0xFFFFFFFF)
+ && ((attrs & FILE_ATTRIBUTE_DIRECTORY) != 0)) {
+ (void)wcscat(wpath, L"\\*");
+ dir->handle = FindFirstFileW(wpath, &dir->info);
+ dir->result.d_name[0] = '\0';
+ } else {
+ mg_free(dir);
+ dir = NULL;
+ }
+ }
+
+ return dir;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+mg_closedir(DIR *dir)
+{
+ int result = 0;
+
+ if (dir != NULL) {
+ if (dir->handle != INVALID_HANDLE_VALUE)
+ result = FindClose(dir->handle) ? 0 : -1;
+
+ mg_free(dir);
+ } else {
+ result = -1;
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ }
+
+ return result;
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static struct dirent *
+mg_readdir(DIR *dir)
+{
+ struct dirent *result = 0;
+
+ if (dir) {
+ if (dir->handle != INVALID_HANDLE_VALUE) {
+ result = &dir->result;
+ (void)WideCharToMultiByte(CP_UTF8,
+ 0,
+ dir->info.cFileName,
+ -1,
+ result->d_name,
+ sizeof(result->d_name),
+ NULL,
+ NULL);
+
+ if (!FindNextFileW(dir->handle, &dir->info)) {
+ (void)FindClose(dir->handle);
+ dir->handle = INVALID_HANDLE_VALUE;
+ }
+
+ } else {
+ SetLastError(ERROR_FILE_NOT_FOUND);
+ }
+ } else {
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ }
+
+ return result;
+}
+
+
+#if !defined(HAVE_POLL)
+#undef POLLIN
+#undef POLLPRI
+#undef POLLOUT
+#undef POLLERR
+#define POLLIN (1) /* Data ready - read will not block. */
+#define POLLPRI (2) /* Priority data ready. */
+#define POLLOUT (4) /* Send queue not full - write will not block. */
+#define POLLERR (8) /* Error event */
+
+FUNCTION_MAY_BE_UNUSED
+static int
+poll(struct mg_pollfd *pfd, unsigned int n, int milliseconds)
+{
+ struct timeval tv;
+ fd_set rset;
+ fd_set wset;
+ fd_set eset;
+ unsigned int i;
+ int result;
+ SOCKET maxfd = 0;
+
+ memset(&tv, 0, sizeof(tv));
+ tv.tv_sec = milliseconds / 1000;
+ tv.tv_usec = (milliseconds % 1000) * 1000;
+ FD_ZERO(&rset);
+ FD_ZERO(&wset);
+ FD_ZERO(&eset);
+
+ for (i = 0; i < n; i++) {
+ if (pfd[i].events & (POLLIN | POLLOUT | POLLERR)) {
+ if (pfd[i].events & POLLIN) {
+ FD_SET(pfd[i].fd, &rset);
+ }
+ if (pfd[i].events & POLLOUT) {
+ FD_SET(pfd[i].fd, &wset);
+ }
+ /* Check for errors for any FD in the set */
+ FD_SET(pfd[i].fd, &eset);
+ }
+ pfd[i].revents = 0;
+
+ if (pfd[i].fd > maxfd) {
+ maxfd = pfd[i].fd;
+ }
+ }
+
+ if ((result = select((int)maxfd + 1, &rset, &wset, &eset, &tv)) > 0) {
+ for (i = 0; i < n; i++) {
+ if (FD_ISSET(pfd[i].fd, &rset)) {
+ pfd[i].revents |= POLLIN;
+ }
+ if (FD_ISSET(pfd[i].fd, &wset)) {
+ pfd[i].revents |= POLLOUT;
+ }
+ if (FD_ISSET(pfd[i].fd, &eset)) {
+ pfd[i].revents |= POLLERR;
+ }
+ }
+ }
+
+ /* We should subtract the time used in select from remaining
+ * "milliseconds", in particular if called from mg_poll with a
+ * timeout quantum.
+ * Unfortunately, the remaining time is not stored in "tv" in all
+ * implementations, so the result in "tv" must be considered undefined.
+ * See http://man7.org/linux/man-pages/man2/select.2.html */
+
+ return result;
+}
+#endif /* HAVE_POLL */
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Enable unused function warning again */
+#pragma GCC diagnostic pop
+#endif
+
+
+static void
+set_close_on_exec(SOCKET sock,
+ const struct mg_connection *conn /* may be null */,
+ struct mg_context *ctx /* may be null */)
+{
+ (void)conn; /* Unused. */
+ (void)ctx;
+
+ (void)SetHandleInformation((HANDLE)(intptr_t)sock, HANDLE_FLAG_INHERIT, 0);
+}
+
+
+CIVETWEB_API int
+mg_start_thread(mg_thread_func_t f, void *p)
+{
+#if defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1)
+ /* Compile-time option to control stack size, e.g.
+ * -DUSE_STACK_SIZE=16384
+ */
+ return ((_beginthread((void(__cdecl *)(void *))f, USE_STACK_SIZE, p)
+ == ((uintptr_t)(-1L)))
+ ? -1
+ : 0);
+#else
+ return (
+ (_beginthread((void(__cdecl *)(void *))f, 0, p) == ((uintptr_t)(-1L)))
+ ? -1
+ : 0);
+#endif /* defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) */
+}
+
+
+/* Start a thread storing the thread context. */
+static int
+mg_start_thread_with_id(unsigned(__stdcall *f)(void *),
+ void *p,
+ pthread_t *threadidptr)
+{
+ uintptr_t uip;
+ HANDLE threadhandle;
+ int result = -1;
+
+ uip = _beginthreadex(NULL, 0, f, p, 0, NULL);
+ threadhandle = (HANDLE)uip;
+ if ((uip != 0) && (threadidptr != NULL)) {
+ *threadidptr = threadhandle;
+ result = 0;
+ }
+
+ return result;
+}
+
+
+/* Wait for a thread to finish. */
+static int
+mg_join_thread(pthread_t threadid)
+{
+ int result;
+ DWORD dwevent;
+
+ result = -1;
+ dwevent = WaitForSingleObject(threadid, (DWORD)INFINITE);
+ if (dwevent == WAIT_FAILED) {
+ DEBUG_TRACE("WaitForSingleObject() failed, error %d", ERRNO);
+ } else {
+ if (dwevent == WAIT_OBJECT_0) {
+ CloseHandle(threadid);
+ result = 0;
+ }
+ }
+
+ return result;
+}
+
+#if !defined(NO_SSL_DL) && !defined(NO_SSL)
+/* If SSL is loaded dynamically, dlopen/dlclose is required. */
+/* Create substitutes for POSIX functions in Win32. */
+
+#if defined(GCC_DIAGNOSTIC)
+/* Show no warning in case system functions are not used. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
+
+FUNCTION_MAY_BE_UNUSED
+static HANDLE
+dlopen(const char *dll_name, int flags)
+{
+ wchar_t wbuf[UTF16_PATH_MAX];
+ (void)flags;
+ path_to_unicode(NULL, dll_name, wbuf, ARRAY_SIZE(wbuf));
+ return LoadLibraryW(wbuf);
+}
+
+
+FUNCTION_MAY_BE_UNUSED
+static int
+dlclose(void *handle)
+{
+ int result;
+
+ if (FreeLibrary((HMODULE)handle) != 0) {
+ result = 0;
+ } else {
+ result = -1;
+ }
+
+ return result;
+}
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Enable unused function warning again */
+#pragma GCC diagnostic pop
+#endif
+
+#endif
+
+
+#if !defined(NO_CGI)
+#define SIGKILL (0)
+
+
+static int
+kill(pid_t pid, int sig_num)
+{
+ (void)TerminateProcess((HANDLE)pid, (UINT)sig_num);
+ (void)CloseHandle((HANDLE)pid);
+ return 0;
+}
+
+
+#if !defined(WNOHANG)
+#define WNOHANG (1)
+#endif
+
+
+static pid_t
+waitpid(pid_t pid, int *status, int flags)
+{
+ DWORD timeout = INFINITE;
+ DWORD waitres;
+
+ (void)status; /* Currently not used by any client here */
+
+ if ((flags | WNOHANG) == WNOHANG) {
+ timeout = 0;
+ }
+
+ waitres = WaitForSingleObject((HANDLE)pid, timeout);
+ if (waitres == WAIT_OBJECT_0) {
+ return pid;
+ }
+ if (waitres == WAIT_TIMEOUT) {
+ return 0;
+ }
+ return (pid_t)-1;
+}
+
+
+static void
+trim_trailing_whitespaces(char *s)
+{
+ char *e = s + strlen(s);
+ while ((e > s) && isspace((unsigned char)e[-1])) {
+ *(--e) = '\0';
+ }
+}
+
+
+static pid_t
+spawn_process(struct mg_connection *conn,
+ const char *prog,
+ char *envblk,
+ char *envp[],
+ int fdin[2],
+ int fdout[2],
+ int fderr[2],
+ const char *dir,
+ int cgi_config_idx)
+{
+ HANDLE me;
+ char *interp;
+ char *interp_arg = 0;
+ char full_dir[UTF8_PATH_MAX], cmdline[UTF8_PATH_MAX], buf[UTF8_PATH_MAX];
+ int truncated;
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ STARTUPINFOA si;
+ PROCESS_INFORMATION pi = {0};
+
+ (void)envp;
+
+ memset(&si, 0, sizeof(si));
+ si.cb = sizeof(si);
+
+ si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+ si.wShowWindow = SW_HIDE;
+
+ me = GetCurrentProcess();
+ DuplicateHandle(me,
+ (HANDLE)_get_osfhandle(fdin[0]),
+ me,
+ &si.hStdInput,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS);
+ DuplicateHandle(me,
+ (HANDLE)_get_osfhandle(fdout[1]),
+ me,
+ &si.hStdOutput,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS);
+ DuplicateHandle(me,
+ (HANDLE)_get_osfhandle(fderr[1]),
+ me,
+ &si.hStdError,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS);
+
+ /* Mark handles that should not be inherited. See
+ * https://msdn.microsoft.com/en-us/library/windows/desktop/ms682499%28v=vs.85%29.aspx
+ */
+ SetHandleInformation((HANDLE)_get_osfhandle(fdin[1]),
+ HANDLE_FLAG_INHERIT,
+ 0);
+ SetHandleInformation((HANDLE)_get_osfhandle(fdout[0]),
+ HANDLE_FLAG_INHERIT,
+ 0);
+ SetHandleInformation((HANDLE)_get_osfhandle(fderr[0]),
+ HANDLE_FLAG_INHERIT,
+ 0);
+
+ /* First check, if there is a CGI interpreter configured for all CGI
+ * scripts. */
+ interp = conn->dom_ctx->config[CGI_INTERPRETER + cgi_config_idx];
+ if (interp != NULL) {
+ /* If there is a configured interpreter, check for additional arguments
+ */
+ interp_arg =
+ conn->dom_ctx->config[CGI_INTERPRETER_ARGS + cgi_config_idx];
+ } else {
+ /* Otherwise, the interpreter must be stated in the first line of the
+ * CGI script file, after a #! (shebang) mark. */
+ buf[0] = buf[1] = '\0';
+
+ /* Get the full script path */
+ mg_snprintf(
+ conn, &truncated, cmdline, sizeof(cmdline), "%s/%s", dir, prog);
+
+ if (truncated) {
+ pi.hProcess = (pid_t)-1;
+ goto spawn_cleanup;
+ }
+
+ /* Open the script file, to read the first line */
+ if (mg_fopen(conn, cmdline, MG_FOPEN_MODE_READ, &file)) {
+
+ /* Read the first line of the script into the buffer */
+ mg_fgets(buf, sizeof(buf), &file);
+ (void)mg_fclose(&file.access); /* ignore error on read only file */
+ buf[sizeof(buf) - 1] = '\0';
+ }
+
+ if ((buf[0] == '#') && (buf[1] == '!')) {
+ trim_trailing_whitespaces(buf + 2);
+ } else {
+ buf[2] = '\0';
+ }
+ interp = buf + 2;
+ }
+
+ GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL);
+
+ if (interp[0] != '\0') {
+ /* This is an interpreted script file. We must call the interpreter. */
+ if ((interp_arg != 0) && (interp_arg[0] != 0)) {
+ mg_snprintf(conn,
+ &truncated,
+ cmdline,
+ sizeof(cmdline),
+ "\"%s\" %s \"%s\\%s\"",
+ interp,
+ interp_arg,
+ full_dir,
+ prog);
+ } else {
+ mg_snprintf(conn,
+ &truncated,
+ cmdline,
+ sizeof(cmdline),
+ "\"%s\" \"%s\\%s\"",
+ interp,
+ full_dir,
+ prog);
+ }
+ } else {
+ /* This is (probably) a compiled program. We call it directly. */
+ mg_snprintf(conn,
+ &truncated,
+ cmdline,
+ sizeof(cmdline),
+ "\"%s\\%s\"",
+ full_dir,
+ prog);
+ }
+
+ if (truncated) {
+ pi.hProcess = (pid_t)-1;
+ goto spawn_cleanup;
+ }
+
+ DEBUG_TRACE("Running [%s]", cmdline);
+ if (CreateProcessA(NULL,
+ cmdline,
+ NULL,
+ NULL,
+ TRUE,
+ CREATE_NEW_PROCESS_GROUP,
+ envblk,
+ NULL,
+ &si,
+ &pi)
+ == 0) {
+ mg_cry_internal(
+ conn, "%s: CreateProcess(%s): %ld", __func__, cmdline, (long)ERRNO);
+ pi.hProcess = (pid_t)-1;
+ /* goto spawn_cleanup; */
+ }
+
+spawn_cleanup:
+ (void)CloseHandle(si.hStdOutput);
+ (void)CloseHandle(si.hStdError);
+ (void)CloseHandle(si.hStdInput);
+ if (pi.hThread != NULL) {
+ (void)CloseHandle(pi.hThread);
+ }
+
+ return (pid_t)pi.hProcess;
+}
+#endif /* !NO_CGI */
+
+
+static int
+set_blocking_mode(SOCKET sock)
+{
+ unsigned long non_blocking = 0;
+ return ioctlsocket(sock, (long)FIONBIO, &non_blocking);
+}
+
+
+static int
+set_non_blocking_mode(SOCKET sock)
+{
+ unsigned long non_blocking = 1;
+ return ioctlsocket(sock, (long)FIONBIO, &non_blocking);
+}
+
+
+#else
+
+
+#if !defined(NO_FILESYSTEMS)
+static int
+mg_stat(const struct mg_connection *conn,
+ const char *path,
+ struct mg_file_stat *filep)
+{
+ struct stat st;
+ if (!filep) {
+ return 0;
+ }
+ memset(filep, 0, sizeof(*filep));
+
+ if (mg_path_suspicious(conn, path)) {
+ return 0;
+ }
+
+ if (0 == stat(path, &st)) {
+ filep->size = (uint64_t)(st.st_size);
+ filep->last_modified = st.st_mtime;
+ filep->is_directory = S_ISDIR(st.st_mode);
+ return 1;
+ }
+
+ return 0;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+static void
+set_close_on_exec(int fd,
+ const struct mg_connection *conn /* may be null */,
+ struct mg_context *ctx /* may be null */)
+{
+#if defined(__ZEPHYR__)
+ (void)fd;
+ (void)conn;
+ (void)ctx;
+#else
+ if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0) {
+ if (conn || ctx) {
+ struct mg_connection fc;
+ mg_cry_internal((conn ? conn : fake_connection(&fc, ctx)),
+ "%s: fcntl(F_SETFD FD_CLOEXEC) failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+ }
+#endif
+}
+
+
+CIVETWEB_API int
+mg_start_thread(mg_thread_func_t func, void *param)
+{
+ pthread_t thread_id;
+ pthread_attr_t attr;
+ int result;
+
+ (void)pthread_attr_init(&attr);
+ (void)pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+#if defined(__ZEPHYR__)
+ pthread_attr_setstack(&attr, &civetweb_main_stack, ZEPHYR_STACK_SIZE);
+#elif defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1)
+ /* Compile-time option to control stack size,
+ * e.g. -DUSE_STACK_SIZE=16384 */
+ (void)pthread_attr_setstacksize(&attr, USE_STACK_SIZE);
+#endif /* defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) */
+
+ result = pthread_create(&thread_id, &attr, func, param);
+ pthread_attr_destroy(&attr);
+
+ return result;
+}
+
+
+/* Start a thread storing the thread context. */
+static int
+mg_start_thread_with_id(mg_thread_func_t func,
+ void *param,
+ pthread_t *threadidptr)
+{
+ pthread_t thread_id;
+ pthread_attr_t attr;
+ int result;
+
+ (void)pthread_attr_init(&attr);
+
+#if defined(__ZEPHYR__)
+ pthread_attr_setstack(&attr,
+ &civetweb_worker_stacks[zephyr_worker_stack_index++],
+ ZEPHYR_STACK_SIZE);
+#elif defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1)
+ /* Compile-time option to control stack size,
+ * e.g. -DUSE_STACK_SIZE=16384 */
+ (void)pthread_attr_setstacksize(&attr, USE_STACK_SIZE);
+#endif /* defined(USE_STACK_SIZE) && USE_STACK_SIZE > 1 */
+
+ result = pthread_create(&thread_id, &attr, func, param);
+ pthread_attr_destroy(&attr);
+ if ((result == 0) && (threadidptr != NULL)) {
+ *threadidptr = thread_id;
+ }
+ return result;
+}
+
+
+/* Wait for a thread to finish. */
+static int
+mg_join_thread(pthread_t threadid)
+{
+ int result;
+
+ result = pthread_join(threadid, NULL);
+ return result;
+}
+
+
+#if !defined(NO_CGI)
+static pid_t
+spawn_process(struct mg_connection *conn,
+ const char *prog,
+ char *envblk,
+ char *envp[],
+ int fdin[2],
+ int fdout[2],
+ int fderr[2],
+ const char *dir,
+ int cgi_config_idx)
+{
+ pid_t pid;
+ const char *interp;
+
+ (void)envblk;
+
+ if ((pid = fork()) == -1) {
+ /* Parent */
+ mg_cry_internal(conn, "%s: fork(): %s", __func__, strerror(ERRNO));
+ } else if (pid != 0) {
+ /* Make sure children close parent-side descriptors.
+ * The caller will close the child-side immediately. */
+ set_close_on_exec(fdin[1], conn, NULL); /* stdin write */
+ set_close_on_exec(fdout[0], conn, NULL); /* stdout read */
+ set_close_on_exec(fderr[0], conn, NULL); /* stderr read */
+ } else {
+ /* Child */
+ if (chdir(dir) != 0) {
+ mg_cry_internal(
+ conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
+ } else if (dup2(fdin[0], 0) == -1) {
+ mg_cry_internal(conn,
+ "%s: dup2(%d, 0): %s",
+ __func__,
+ fdin[0],
+ strerror(ERRNO));
+ } else if (dup2(fdout[1], 1) == -1) {
+ mg_cry_internal(conn,
+ "%s: dup2(%d, 1): %s",
+ __func__,
+ fdout[1],
+ strerror(ERRNO));
+ } else if (dup2(fderr[1], 2) == -1) {
+ mg_cry_internal(conn,
+ "%s: dup2(%d, 2): %s",
+ __func__,
+ fderr[1],
+ strerror(ERRNO));
+ } else {
+ struct sigaction sa;
+
+ /* Keep stderr and stdout in two different pipes.
+ * Stdout will be sent back to the client,
+ * stderr should go into a server error log. */
+ (void)close(fdin[0]);
+ (void)close(fdout[1]);
+ (void)close(fderr[1]);
+
+ /* Close write end fdin and read end fdout and fderr */
+ (void)close(fdin[1]);
+ (void)close(fdout[0]);
+ (void)close(fderr[0]);
+
+ /* After exec, all signal handlers are restored to their default
+ * values, with one exception of SIGCHLD. According to
+ * POSIX.1-2001 and Linux's implementation, SIGCHLD's handler
+ * will leave unchanged after exec if it was set to be ignored.
+ * Restore it to default action. */
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_DFL;
+ sigaction(SIGCHLD, &sa, NULL);
+
+ interp = conn->dom_ctx->config[CGI_INTERPRETER + cgi_config_idx];
+ if (interp == NULL) {
+ /* no interpreter configured, call the program directly */
+ (void)execle(prog, prog, NULL, envp);
+ mg_cry_internal(conn,
+ "%s: execle(%s): %s",
+ __func__,
+ prog,
+ strerror(ERRNO));
+ } else {
+ /* call the configured interpreter */
+ const char *interp_args =
+ conn->dom_ctx
+ ->config[CGI_INTERPRETER_ARGS + cgi_config_idx];
+
+ if ((interp_args != NULL) && (interp_args[0] != 0)) {
+ (void)execle(interp, interp, interp_args, prog, NULL, envp);
+ } else {
+ (void)execle(interp, interp, prog, NULL, envp);
+ }
+ mg_cry_internal(conn,
+ "%s: execle(%s %s): %s",
+ __func__,
+ interp,
+ prog,
+ strerror(ERRNO));
+ }
+ }
+ exit(EXIT_FAILURE);
+ }
+
+ return pid;
+}
+#endif /* !NO_CGI */
+
+
+static int
+set_non_blocking_mode(SOCKET sock)
+{
+ int flags = fcntl(sock, F_GETFL, 0);
+ if (flags < 0) {
+ return -1;
+ }
+
+ if (fcntl(sock, F_SETFL, (flags | O_NONBLOCK)) < 0) {
+ return -1;
+ }
+ return 0;
+}
+
+static int
+set_blocking_mode(SOCKET sock)
+{
+ int flags = fcntl(sock, F_GETFL, 0);
+ if (flags < 0) {
+ return -1;
+ }
+
+ if (fcntl(sock, F_SETFL, flags & (~(int)(O_NONBLOCK))) < 0) {
+ return -1;
+ }
+ return 0;
+}
+#endif /* _WIN32 / else */
+
+/* End of initial operating system specific define block. */
+
+
+/* Get a random number (independent of C rand function) */
+static uint64_t
+get_random(void)
+{
+ static uint64_t lfsr = 0; /* Linear feedback shift register */
+ static uint64_t lcg = 0; /* Linear congruential generator */
+ uint64_t now = mg_get_current_time_ns();
+
+ if (lfsr == 0) {
+ /* lfsr will be only 0 if has not been initialized,
+ * so this code is called only once. */
+ lfsr = mg_get_current_time_ns();
+ lcg = mg_get_current_time_ns();
+ } else {
+ /* Get the next step of both random number generators. */
+ lfsr = (lfsr >> 1)
+ | ((((lfsr >> 0) ^ (lfsr >> 1) ^ (lfsr >> 3) ^ (lfsr >> 4)) & 1)
+ << 63);
+ lcg = lcg * 6364136223846793005LL + 1442695040888963407LL;
+ }
+
+ /* Combining two pseudo-random number generators and a high resolution
+ * part
+ * of the current server time will make it hard (impossible?) to guess
+ * the
+ * next number. */
+ return (lfsr ^ lcg ^ now);
+}
+
+
+static int
+mg_poll(struct mg_pollfd *pfd,
+ unsigned int n,
+ int milliseconds,
+ const stop_flag_t *stop_flag)
+{
+ /* Call poll, but only for a maximum time of a few seconds.
+ * This will allow to stop the server after some seconds, instead
+ * of having to wait for a long socket timeout. */
+ int ms_now = SOCKET_TIMEOUT_QUANTUM; /* Sleep quantum in ms */
+
+ int check_pollerr = 0;
+ if ((n == 1) && ((pfd[0].events & POLLERR) == 0)) {
+ /* If we wait for only one file descriptor, wait on error as well */
+ pfd[0].events |= POLLERR;
+ check_pollerr = 1;
+ }
+
+ do {
+ int result;
+
+ if (!STOP_FLAG_IS_ZERO(&*stop_flag)) {
+ /* Shut down signal */
+ return -2;
+ }
+
+ if ((milliseconds >= 0) && (milliseconds < ms_now)) {
+ ms_now = milliseconds;
+ }
+
+ result = poll(pfd, n, ms_now);
+ if (result != 0) {
+ int err = ERRNO;
+ if ((result == 1) || (!ERROR_TRY_AGAIN(err))) {
+ /* Poll returned either success (1) or error (-1).
+ * Forward both to the caller. */
+ if ((check_pollerr)
+ && ((pfd[0].revents & (POLLIN | POLLOUT | POLLERR))
+ == POLLERR)) {
+ /* One and only file descriptor returned error */
+ return -1;
+ }
+ return result;
+ }
+ }
+
+ /* Poll returned timeout (0). */
+ if (milliseconds > 0) {
+ milliseconds -= ms_now;
+ }
+
+ } while (milliseconds > 0);
+
+ /* timeout: return 0 */
+ return 0;
+}
+
+
+/* Write data to the IO channel - opened file descriptor, socket or SSL
+ * descriptor.
+ * Return value:
+ * >=0 .. number of bytes successfully written
+ * -1 .. timeout
+ * -2 .. error
+ */
+static int
+push_inner(struct mg_context *ctx,
+ FILE *fp,
+ SOCKET sock,
+ SSL *ssl,
+ const char *buf,
+ int len,
+ double timeout)
+{
+ uint64_t start = 0, now = 0, timeout_ns = 0;
+ int n, err;
+ unsigned ms_wait = SOCKET_TIMEOUT_QUANTUM; /* Sleep quantum in ms */
+
+#if defined(_WIN32)
+ typedef int len_t;
+#else
+ typedef size_t len_t;
+#endif
+
+ if (timeout > 0) {
+ now = mg_get_current_time_ns();
+ start = now;
+ timeout_ns = (uint64_t)(timeout * 1.0E9);
+ }
+
+ if (ctx == NULL) {
+ return -2;
+ }
+
+#if defined(NO_SSL) && !defined(USE_MBEDTLS)
+ if (ssl) {
+ return -2;
+ }
+#endif
+
+ /* Try to read until it succeeds, fails, times out, or the server
+ * shuts down. */
+ for (;;) {
+
+#if defined(USE_MBEDTLS)
+ if (ssl != NULL) {
+ n = mbed_ssl_write(ssl, (const unsigned char *)buf, len);
+ if (n <= 0) {
+ if ((n == MBEDTLS_ERR_SSL_WANT_READ)
+ || (n == MBEDTLS_ERR_SSL_WANT_WRITE)
+ || n == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS) {
+ n = 0;
+ } else {
+ fprintf(stderr, "SSL write failed, error %d\n", n);
+ return -2;
+ }
+ } else {
+ err = 0;
+ }
+ } else
+#elif !defined(NO_SSL)
+ if (ssl != NULL) {
+ ERR_clear_error();
+ n = SSL_write(ssl, buf, len);
+ if (n <= 0) {
+ err = SSL_get_error(ssl, n);
+ if ((err == SSL_ERROR_SYSCALL) && (n == -1)) {
+ err = ERRNO;
+ } else if ((err == SSL_ERROR_WANT_READ)
+ || (err == SSL_ERROR_WANT_WRITE)) {
+ n = 0;
+ } else {
+ DEBUG_TRACE("SSL_write() failed, error %d", err);
+ ERR_clear_error();
+ return -2;
+ }
+ ERR_clear_error();
+ } else {
+ err = 0;
+ }
+ } else
+#endif
+
+ if (fp != NULL) {
+ n = (int)fwrite(buf, 1, (size_t)len, fp);
+ if (ferror(fp)) {
+ n = -1;
+ err = ERRNO;
+ } else {
+ err = 0;
+ }
+ } else {
+ n = (int)send(sock, buf, (len_t)len, MSG_NOSIGNAL);
+ err = (n < 0) ? ERRNO : 0;
+ if (ERROR_TRY_AGAIN(err)) {
+ err = 0;
+ n = 0;
+ }
+ if (n < 0) {
+ /* shutdown of the socket at client side */
+ return -2;
+ }
+ }
+
+ if (!STOP_FLAG_IS_ZERO(&ctx->stop_flag)) {
+ return -2;
+ }
+
+ if ((n > 0) || ((n == 0) && (len == 0))) {
+ /* some data has been read, or no data was requested */
+ return n;
+ }
+ if (n < 0) {
+ /* socket error - check errno */
+ DEBUG_TRACE("send() failed, error %d", err);
+
+ /* TODO (mid): error handling depending on the error code.
+ * These codes are different between Windows and Linux.
+ * Currently there is no problem with failing send calls,
+ * if there is a reproducible situation, it should be
+ * investigated in detail.
+ */
+ return -2;
+ }
+
+ /* Only in case n=0 (timeout), repeat calling the write function */
+
+ /* If send failed, wait before retry */
+ if (fp != NULL) {
+ /* For files, just wait a fixed time.
+ * Maybe it helps, maybe not. */
+ mg_sleep(5);
+ } else {
+ /* For sockets, wait for the socket using poll */
+ struct mg_pollfd pfd[1];
+ int pollres;
+
+ pfd[0].fd = sock;
+ pfd[0].events = POLLOUT;
+ pollres = mg_poll(pfd, 1, (int)(ms_wait), &(ctx->stop_flag));
+ if (!STOP_FLAG_IS_ZERO(&ctx->stop_flag)) {
+ return -2;
+ }
+ if (pollres > 0) {
+ continue;
+ }
+ }
+
+ if (timeout > 0) {
+ now = mg_get_current_time_ns();
+ if ((now - start) > timeout_ns) {
+ /* Timeout */
+ break;
+ }
+ }
+ }
+
+ (void)err; /* Avoid unused warning if NO_SSL is set and DEBUG_TRACE is not
+ used */
+
+ return -1;
+}
+
+
+static int
+push_all(struct mg_context *ctx,
+ FILE *fp,
+ SOCKET sock,
+ SSL *ssl,
+ const char *buf,
+ int len)
+{
+ double timeout = -1.0;
+ int n, nwritten = 0;
+
+ if (ctx == NULL) {
+ return -1;
+ }
+
+ if (ctx->dd.config[REQUEST_TIMEOUT]) {
+ timeout = atoi(ctx->dd.config[REQUEST_TIMEOUT]) / 1000.0;
+ }
+ if (timeout <= 0.0) {
+ timeout = strtod(config_options[REQUEST_TIMEOUT].default_value, NULL)
+ / 1000.0;
+ }
+
+ while ((len > 0) && STOP_FLAG_IS_ZERO(&ctx->stop_flag)) {
+ n = push_inner(ctx, fp, sock, ssl, buf + nwritten, len, timeout);
+ if (n < 0) {
+ if (nwritten == 0) {
+ nwritten = -1; /* Propagate the error */
+ }
+ break;
+ } else if (n == 0) {
+ break; /* No more data to write */
+ } else {
+ nwritten += n;
+ len -= n;
+ }
+ }
+
+ return nwritten;
+}
+
+
+/* Read from IO channel - opened file descriptor, socket, or SSL descriptor.
+ * Return value:
+ * >=0 .. number of bytes successfully read
+ * -1 .. timeout
+ * -2 .. error
+ */
+static int
+pull_inner(FILE *fp,
+ struct mg_connection *conn,
+ char *buf,
+ int len,
+ double timeout)
+{
+ int nread, err = 0;
+
+#if defined(_WIN32)
+ typedef int len_t;
+#else
+ typedef size_t len_t;
+#endif
+
+ /* We need an additional wait loop around this, because in some cases
+ * with TLSwe may get data from the socket but not from SSL_read.
+ * In this case we need to repeat at least once.
+ */
+
+ if (fp != NULL) {
+ /* Use read() instead of fread(), because if we're reading from the
+ * CGI pipe, fread() may block until IO buffer is filled up. We
+ * cannot afford to block and must pass all read bytes immediately
+ * to the client. */
+ nread = (int)read(fileno(fp), buf, (size_t)len);
+
+ err = (nread < 0) ? ERRNO : 0;
+ if ((nread == 0) && (len > 0)) {
+ /* Should get data, but got EOL */
+ return -2;
+ }
+
+#if defined(USE_MBEDTLS)
+ } else if (conn->ssl != NULL) {
+ struct mg_pollfd pfd[1];
+ int to_read;
+ int pollres;
+
+ to_read = mbedtls_ssl_get_bytes_avail(conn->ssl);
+
+ if (to_read > 0) {
+ /* We already know there is no more data buffered in conn->buf
+ * but there is more available in the SSL layer. So don't poll
+ * conn->client.sock yet. */
+
+ pollres = 1;
+ if (to_read > len)
+ to_read = len;
+ } else {
+ pfd[0].fd = conn->client.sock;
+ pfd[0].events = POLLIN;
+
+ to_read = len;
+
+ pollres = mg_poll(pfd,
+ 1,
+ (int)(timeout * 1000.0),
+ &(conn->phys_ctx->stop_flag));
+
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ return -2;
+ }
+ }
+
+ if (pollres > 0) {
+ nread = mbed_ssl_read(conn->ssl, (unsigned char *)buf, to_read);
+ if (nread <= 0) {
+ if ((nread == MBEDTLS_ERR_SSL_WANT_READ)
+ || (nread == MBEDTLS_ERR_SSL_WANT_WRITE)
+ || nread == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS) {
+ nread = 0;
+ } else {
+ fprintf(stderr, "SSL read failed, error %d\n", nread);
+ return -2;
+ }
+ } else {
+ err = 0;
+ }
+
+ } else if (pollres < 0) {
+ /* Error */
+ return -2;
+ } else {
+ /* pollres = 0 means timeout */
+ nread = 0;
+ }
+
+#elif !defined(NO_SSL)
+ } else if (conn->ssl != NULL) {
+ int ssl_pending;
+ struct mg_pollfd pfd[1];
+ int pollres;
+
+ if ((ssl_pending = SSL_pending(conn->ssl)) > 0) {
+ /* We already know there is no more data buffered in conn->buf
+ * but there is more available in the SSL layer. So don't poll
+ * conn->client.sock yet. */
+ if (ssl_pending > len) {
+ ssl_pending = len;
+ }
+ pollres = 1;
+ } else {
+ pfd[0].fd = conn->client.sock;
+ pfd[0].events = POLLIN;
+ pollres = mg_poll(pfd,
+ 1,
+ (int)(timeout * 1000.0),
+ &(conn->phys_ctx->stop_flag));
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ return -2;
+ }
+ }
+ if (pollres > 0) {
+ ERR_clear_error();
+ nread =
+ SSL_read(conn->ssl, buf, (ssl_pending > 0) ? ssl_pending : len);
+ if (nread <= 0) {
+ err = SSL_get_error(conn->ssl, nread);
+ if ((err == SSL_ERROR_SYSCALL) && (nread == -1)) {
+ err = ERRNO;
+ } else if ((err == SSL_ERROR_WANT_READ)
+ || (err == SSL_ERROR_WANT_WRITE)) {
+ nread = 0;
+ } else {
+ /* All errors should return -2 */
+ DEBUG_TRACE("SSL_read() failed, error %d", err);
+ ERR_clear_error();
+ return -2;
+ }
+ ERR_clear_error();
+ } else {
+ err = 0;
+ }
+ } else if (pollres < 0) {
+ /* Error */
+ return -2;
+ } else {
+ /* pollres = 0 means timeout */
+ nread = 0;
+ }
+#endif
+
+ } else {
+ struct mg_pollfd pfd[1];
+ int pollres;
+
+ pfd[0].fd = conn->client.sock;
+ pfd[0].events = POLLIN;
+ pollres = mg_poll(pfd,
+ 1,
+ (int)(timeout * 1000.0),
+ &(conn->phys_ctx->stop_flag));
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ return -2;
+ }
+ if (pollres > 0) {
+ nread = (int)recv(conn->client.sock, buf, (len_t)len, 0);
+ err = (nread < 0) ? ERRNO : 0;
+ if (nread <= 0) {
+ /* shutdown of the socket at client side */
+ return -2;
+ }
+ } else if (pollres < 0) {
+ /* error calling poll */
+ return -2;
+ } else {
+ /* pollres = 0 means timeout */
+ nread = 0;
+ }
+ }
+
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ return -2;
+ }
+
+ if ((nread > 0) || ((nread == 0) && (len == 0))) {
+ /* some data has been read, or no data was requested */
+ return nread;
+ }
+
+ if (nread < 0) {
+ /* socket error - check errno */
+#if defined(_WIN32)
+ if (err == WSAEWOULDBLOCK) {
+ /* TODO (low): check if this is still required */
+ /* standard case if called from close_socket_gracefully */
+ return -2;
+ } else if (err == WSAETIMEDOUT) {
+ /* TODO (low): check if this is still required */
+ /* timeout is handled by the while loop */
+ return 0;
+ } else if (err == WSAECONNABORTED) {
+ /* See https://www.chilkatsoft.com/p/p_299.asp */
+ return -2;
+ } else {
+ DEBUG_TRACE("recv() failed, error %d", err);
+ return -2;
+ }
+#else
+ /* TODO: POSIX returns either EAGAIN or EWOULDBLOCK in both cases,
+ * if the timeout is reached and if the socket was set to non-
+ * blocking in close_socket_gracefully, so we can not distinguish
+ * here. We have to wait for the timeout in both cases for now.
+ */
+ if (ERROR_TRY_AGAIN(err)) {
+ /* TODO (low): check if this is still required */
+ /* EAGAIN/EWOULDBLOCK:
+ * standard case if called from close_socket_gracefully
+ * => should return -1 */
+ /* or timeout occurred
+ * => the code must stay in the while loop */
+
+ /* EINTR can be generated on a socket with a timeout set even
+ * when SA_RESTART is effective for all relevant signals
+ * (see signal(7)).
+ * => stay in the while loop */
+ } else {
+ DEBUG_TRACE("recv() failed, error %d", err);
+ return -2;
+ }
+#endif
+ }
+
+ /* Timeout occurred, but no data available. */
+ return -1;
+}
+
+
+static int
+pull_all(FILE *fp, struct mg_connection *conn, char *buf, int len)
+{
+ int n, nread = 0;
+ double timeout = -1.0;
+ uint64_t start_time = 0, now = 0, timeout_ns = 0;
+
+ if (conn->dom_ctx->config[REQUEST_TIMEOUT]) {
+ timeout = atoi(conn->dom_ctx->config[REQUEST_TIMEOUT]) / 1000.0;
+ }
+ if (timeout <= 0.0) {
+ timeout = strtod(config_options[REQUEST_TIMEOUT].default_value, NULL)
+ / 1000.0;
+ }
+ start_time = mg_get_current_time_ns();
+ timeout_ns = (uint64_t)(timeout * 1.0E9);
+
+ while ((len > 0) && STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ n = pull_inner(fp, conn, buf + nread, len, timeout);
+ if (n == -2) {
+ if (nread == 0) {
+ nread = -1; /* Propagate the error */
+ }
+ break;
+ } else if (n == -1) {
+ /* timeout */
+ if (timeout >= 0.0) {
+ now = mg_get_current_time_ns();
+ if ((now - start_time) <= timeout_ns) {
+ continue;
+ }
+ }
+ break;
+ } else if (n == 0) {
+ break; /* No more data to read */
+ } else {
+ nread += n;
+ len -= n;
+ }
+ }
+
+ return nread;
+}
+
+
+static void
+discard_unread_request_data(struct mg_connection *conn)
+{
+ char buf[MG_BUF_LEN];
+
+ while (mg_read(conn, buf, sizeof(buf)) > 0)
+ ;
+}
+
+
+static int
+mg_read_inner(struct mg_connection *conn, void *buf, size_t len)
+{
+ int64_t content_len, n, buffered_len, nread;
+ int64_t len64 =
+ (int64_t)((len > INT_MAX) ? INT_MAX : len); /* since the return value is
+ * int, we may not read more
+ * bytes */
+ const char *body;
+
+ if (conn == NULL) {
+ return 0;
+ }
+
+ /* If Content-Length is not set for a response with body data,
+ * we do not know in advance how much data should be read. */
+ content_len = conn->content_len;
+ if (content_len < 0) {
+ /* The body data is completed when the connection is closed. */
+ content_len = INT64_MAX;
+ }
+
+ nread = 0;
+ if (conn->consumed_content < content_len) {
+ /* Adjust number of bytes to read. */
+ int64_t left_to_read = content_len - conn->consumed_content;
+ if (left_to_read < len64) {
+ /* Do not read more than the total content length of the
+ * request.
+ */
+ len64 = left_to_read;
+ }
+
+ /* Return buffered data */
+ buffered_len = (int64_t)(conn->data_len) - (int64_t)conn->request_len
+ - conn->consumed_content;
+ if (buffered_len > 0) {
+ if (len64 < buffered_len) {
+ buffered_len = len64;
+ }
+ body = conn->buf + conn->request_len + conn->consumed_content;
+ memcpy(buf, body, (size_t)buffered_len);
+ len64 -= buffered_len;
+ conn->consumed_content += buffered_len;
+ nread += buffered_len;
+ buf = (char *)buf + buffered_len;
+ }
+
+ /* We have returned all buffered data. Read new data from the remote
+ * socket.
+ */
+ if ((n = pull_all(NULL, conn, (char *)buf, (int)len64)) >= 0) {
+ conn->consumed_content += n;
+ nread += n;
+ } else {
+ nread = ((nread > 0) ? nread : n);
+ }
+ }
+ return (int)nread;
+}
+
+
+/* Forward declarations */
+static void handle_request(struct mg_connection *);
+static void log_access(const struct mg_connection *);
+
+
+/* Handle request, update statistics and call access log */
+static void
+handle_request_stat_log(struct mg_connection *conn)
+{
+#if defined(USE_SERVER_STATS)
+ struct timespec tnow;
+ conn->conn_state = 4; /* processing */
+#endif
+
+ handle_request(conn);
+
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 5; /* processed */
+
+ clock_gettime(CLOCK_MONOTONIC, &tnow);
+ conn->processing_time = mg_difftimespec(&tnow, &(conn->req_time));
+
+ mg_atomic_add64(&(conn->phys_ctx->total_data_read), conn->consumed_content);
+ mg_atomic_add64(&(conn->phys_ctx->total_data_written),
+ conn->num_bytes_sent);
+#endif
+
+ DEBUG_TRACE("%s", "handle_request done");
+
+ if (conn->phys_ctx->callbacks.end_request != NULL) {
+ conn->phys_ctx->callbacks.end_request(conn, conn->status_code);
+ DEBUG_TRACE("%s", "end_request callback done");
+ }
+ log_access(conn);
+}
+
+
+#if defined(USE_HTTP2)
+#if defined(NO_SSL)
+#error "HTTP2 requires ALPN, ALPN requires SSL/TLS"
+#endif
+#define USE_ALPN
+#include "http2.inl"
+/* Not supported with HTTP/2 */
+#define HTTP1_only \
+ { \
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP2) { \
+ http2_must_use_http1(conn); \
+ DEBUG_TRACE("%s", "must use HTTP/1.x"); \
+ return; \
+ } \
+ }
+#else
+#define HTTP1_only
+#endif
+
+
+CIVETWEB_API int
+mg_read(struct mg_connection *conn, void *buf, size_t len)
+{
+ if (len > INT_MAX) {
+ len = INT_MAX;
+ }
+
+ if (conn == NULL) {
+ return 0;
+ }
+
+ if (conn->is_chunked) {
+ size_t all_read = 0;
+
+ while (len > 0) {
+ if (conn->is_chunked >= 3) {
+ /* No more data left to read */
+ return 0;
+ }
+ if (conn->is_chunked != 1) {
+ /* Has error */
+ return -1;
+ }
+
+ if (conn->consumed_content != conn->content_len) {
+ /* copy from the current chunk */
+ int read_ret = mg_read_inner(conn, (char *)buf + all_read, len);
+
+ if (read_ret < 1) {
+ /* read error */
+ conn->is_chunked = 2;
+ return -1;
+ }
+
+ all_read += (size_t)read_ret;
+ len -= (size_t)read_ret;
+
+ if (conn->consumed_content == conn->content_len) {
+ /* Add data bytes in the current chunk have been read,
+ * so we are expecting \r\n now. */
+ char x[2];
+ conn->content_len += 2;
+ if ((mg_read_inner(conn, x, 2) != 2) || (x[0] != '\r')
+ || (x[1] != '\n')) {
+ /* Protocol violation */
+ conn->is_chunked = 2;
+ return -1;
+ }
+ }
+
+ } else {
+ /* fetch a new chunk */
+ size_t i;
+ char lenbuf[64];
+ char *end = NULL;
+ unsigned long chunkSize = 0;
+
+ for (i = 0; i < (sizeof(lenbuf) - 1); i++) {
+ conn->content_len++;
+ if (mg_read_inner(conn, lenbuf + i, 1) != 1) {
+ lenbuf[i] = 0;
+ }
+ if ((i > 0) && (lenbuf[i] == ';')) {
+ // chunk extension --> skip chars until next CR
+ //
+ // RFC 2616, 3.6.1 Chunked Transfer Coding
+ // (https://www.rfc-editor.org/rfc/rfc2616#page-25)
+ //
+ // chunk = chunk-size [ chunk-extension ] CRLF
+ // chunk-data CRLF
+ // ...
+ // chunk-extension= *( ";" chunk-ext-name [ "="
+ // chunk-ext-val ] )
+ do
+ ++conn->content_len;
+ while (mg_read_inner(conn, lenbuf + i, 1) == 1
+ && lenbuf[i] != '\r');
+ }
+ if ((i > 0) && (lenbuf[i] == '\r')
+ && (lenbuf[i - 1] != '\r')) {
+ continue;
+ }
+ if ((i > 1) && (lenbuf[i] == '\n')
+ && (lenbuf[i - 1] == '\r')) {
+ lenbuf[i + 1] = 0;
+ chunkSize = strtoul(lenbuf, &end, 16);
+ if (chunkSize == 0) {
+ /* regular end of content */
+ conn->is_chunked = 3;
+ }
+ break;
+ }
+ if (!isxdigit((unsigned char)lenbuf[i])) {
+ /* illegal character for chunk length */
+ conn->is_chunked = 2;
+ return -1;
+ }
+ }
+ if ((end == NULL) || (*end != '\r')) {
+ /* chunksize not set correctly */
+ conn->is_chunked = 2;
+ return -1;
+ }
+ if (conn->is_chunked == 3) {
+ /* try discarding trailer for keep-alive */
+
+ // We found the last chunk (length 0) including the
+ // CRLF that terminates that chunk. Now follows a possibly
+ // empty trailer and a final CRLF.
+ //
+ // see RFC 2616, 3.6.1 Chunked Transfer Coding
+ // (https://www.rfc-editor.org/rfc/rfc2616#page-25)
+ //
+ // Chunked-Body = *chunk
+ // last-chunk
+ // trailer
+ // CRLF
+ // ...
+ // last-chunk = 1*("0") [ chunk-extension ] CRLF
+ // ...
+ // trailer = *(entity-header CRLF)
+
+ int crlf_count = 2; // one CRLF already determined
+
+ while (crlf_count < 4 && conn->is_chunked == 3) {
+ ++conn->content_len;
+ if (mg_read_inner(conn, lenbuf, 1) == 1) {
+ if ((crlf_count == 0 || crlf_count == 2)) {
+ if (lenbuf[0] == '\r')
+ ++crlf_count;
+ else
+ crlf_count = 0;
+ } else {
+ // previous character was a CR
+ // --> next character must be LF
+
+ if (lenbuf[0] == '\n')
+ ++crlf_count;
+ else
+ conn->is_chunked = 2;
+ }
+ } else
+ // premature end of trailer
+ conn->is_chunked = 2;
+ }
+
+ if (conn->is_chunked == 2)
+ return -1;
+ else
+ conn->is_chunked = 4;
+
+ break;
+ }
+
+ /* append a new chunk */
+ conn->content_len += (int64_t)chunkSize;
+ }
+ }
+
+ return (int)all_read;
+ }
+ return mg_read_inner(conn, buf, len);
+}
+
+
+CIVETWEB_API int
+mg_write(struct mg_connection *conn, const void *buf, size_t len)
+{
+ time_t now;
+ int n, total, allowed;
+
+ if (conn == NULL) {
+ return 0;
+ }
+ if (len > INT_MAX) {
+ return -1;
+ }
+
+ /* Mark connection as "data sent" */
+ conn->request_state = 10;
+#if defined(USE_HTTP2)
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP2) {
+ http2_data_frame_head(conn, len, 0);
+ }
+#endif
+
+ if (conn->throttle > 0) {
+ if ((now = time(NULL)) != conn->last_throttle_time) {
+ conn->last_throttle_time = now;
+ conn->last_throttle_bytes = 0;
+ }
+ allowed = conn->throttle - conn->last_throttle_bytes;
+ if (allowed > (int)len) {
+ allowed = (int)len;
+ }
+
+ total = push_all(conn->phys_ctx,
+ NULL,
+ conn->client.sock,
+ conn->ssl,
+ (const char *)buf,
+ allowed);
+
+ if (total == allowed) {
+
+ buf = (const char *)buf + total;
+ conn->last_throttle_bytes += total;
+ while ((total < (int)len)
+ && STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ allowed = (conn->throttle > ((int)len - total))
+ ? (int)len - total
+ : conn->throttle;
+
+ n = push_all(conn->phys_ctx,
+ NULL,
+ conn->client.sock,
+ conn->ssl,
+ (const char *)buf,
+ allowed);
+
+ if (n != allowed) {
+ break;
+ }
+ sleep(1);
+ conn->last_throttle_bytes = allowed;
+ conn->last_throttle_time = time(NULL);
+ buf = (const char *)buf + n;
+ total += n;
+ }
+ }
+ } else {
+ total = push_all(conn->phys_ctx,
+ NULL,
+ conn->client.sock,
+ conn->ssl,
+ (const char *)buf,
+ (int)len);
+ }
+ if (total > 0) {
+ conn->num_bytes_sent += total;
+ }
+ return total;
+}
+
+
+/* Send a chunk, if "Transfer-Encoding: chunked" is used */
+CIVETWEB_API int
+mg_send_chunk(struct mg_connection *conn,
+ const char *chunk,
+ unsigned int chunk_len)
+{
+ char lenbuf[16];
+ size_t lenbuf_len;
+ int ret;
+ int t;
+
+ /* First store the length information in a text buffer. */
+ sprintf(lenbuf, "%x\r\n", chunk_len);
+ lenbuf_len = strlen(lenbuf);
+
+ /* Then send length information, chunk and terminating \r\n. */
+ ret = mg_write(conn, lenbuf, lenbuf_len);
+ if (ret != (int)lenbuf_len) {
+ return -1;
+ }
+ t = ret;
+
+ ret = mg_write(conn, chunk, chunk_len);
+ if (ret != (int)chunk_len) {
+ return -1;
+ }
+ t += ret;
+
+ ret = mg_write(conn, "\r\n", 2);
+ if (ret != 2) {
+ return -1;
+ }
+ t += ret;
+
+ return t;
+}
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* This block forwards format strings to printf implementations,
+ * so we need to disable the format-nonliteral warning. */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+#endif
+
+
+/* Alternative alloc_vprintf() for non-compliant C runtimes */
+static int
+alloc_vprintf2(char **buf, const char *fmt, va_list ap)
+{
+ va_list ap_copy;
+ size_t size = MG_BUF_LEN / 4;
+ int len = -1;
+
+ *buf = NULL;
+ while (len < 0) {
+ if (*buf) {
+ mg_free(*buf);
+ }
+
+ size *= 4;
+ *buf = (char *)mg_malloc(size);
+ if (!*buf) {
+ break;
+ }
+
+ va_copy(ap_copy, ap);
+ len = vsnprintf_impl(*buf, size - 1, fmt, ap_copy);
+ va_end(ap_copy);
+ (*buf)[size - 1] = 0;
+ }
+
+ return len;
+}
+
+
+/* Print message to buffer. If buffer is large enough to hold the message,
+ * return buffer. If buffer is to small, allocate large enough buffer on
+ * heap,
+ * and return allocated buffer. */
+static int
+alloc_vprintf(char **out_buf,
+ char *prealloc_buf,
+ size_t prealloc_size,
+ const char *fmt,
+ va_list ap)
+{
+ va_list ap_copy;
+ int len;
+
+ /* Windows is not standard-compliant, and vsnprintf() returns -1 if
+ * buffer is too small. Also, older versions of msvcrt.dll do not have
+ * _vscprintf(). However, if size is 0, vsnprintf() behaves correctly.
+ * Therefore, we make two passes: on first pass, get required message
+ * length.
+ * On second pass, actually print the message. */
+ va_copy(ap_copy, ap);
+ len = vsnprintf_impl(NULL, 0, fmt, ap_copy);
+ va_end(ap_copy);
+
+ if (len < 0) {
+ /* C runtime is not standard compliant, vsnprintf() returned -1.
+ * Switch to alternative code path that uses incremental
+ * allocations.
+ */
+ va_copy(ap_copy, ap);
+ len = alloc_vprintf2(out_buf, fmt, ap_copy);
+ va_end(ap_copy);
+
+ } else if ((size_t)(len) >= prealloc_size) {
+ /* The pre-allocated buffer not large enough. */
+ /* Allocate a new buffer. */
+ *out_buf = (char *)mg_malloc((size_t)(len) + 1);
+ if (!*out_buf) {
+ /* Allocation failed. Return -1 as "out of memory" error. */
+ return -1;
+ }
+ /* Buffer allocation successful. Store the string there. */
+ va_copy(ap_copy, ap);
+ IGNORE_UNUSED_RESULT(
+ vsnprintf_impl(*out_buf, (size_t)(len) + 1, fmt, ap_copy));
+ va_end(ap_copy);
+
+ } else {
+ /* The pre-allocated buffer is large enough.
+ * Use it to store the string and return the address. */
+ va_copy(ap_copy, ap);
+ IGNORE_UNUSED_RESULT(
+ vsnprintf_impl(prealloc_buf, prealloc_size, fmt, ap_copy));
+ va_end(ap_copy);
+ *out_buf = prealloc_buf;
+ }
+
+ return len;
+}
+
+
+static int
+alloc_printf(char **out_buf, const char *fmt, ...)
+{
+ va_list ap;
+ int result;
+
+ va_start(ap, fmt);
+ result = alloc_vprintf(out_buf, NULL, 0, fmt, ap);
+ va_end(ap);
+
+ return result;
+}
+
+
+#if defined(GCC_DIAGNOSTIC)
+/* Enable format-nonliteral warning again. */
+#pragma GCC diagnostic pop
+#endif
+
+
+static int
+mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap)
+{
+ char mem[MG_BUF_LEN];
+ char *buf = NULL;
+ int len;
+
+ if ((len = alloc_vprintf(&buf, mem, sizeof(mem), fmt, ap)) > 0) {
+ len = mg_write(conn, buf, (size_t)len);
+ }
+ if (buf != mem) {
+ mg_free(buf);
+ }
+
+ return len;
+}
+
+
+CIVETWEB_API int
+mg_printf(struct mg_connection *conn, const char *fmt, ...)
+{
+ va_list ap;
+ int result;
+
+ va_start(ap, fmt);
+ result = mg_vprintf(conn, fmt, ap);
+ va_end(ap);
+
+ return result;
+}
+
+
+CIVETWEB_API int
+mg_url_decode(const char *src,
+ int src_len,
+ char *dst,
+ int dst_len,
+ int is_form_url_encoded)
+{
+ int i, j, a, b;
+#define HEXTOI(x) (isdigit(x) ? (x - '0') : (x - 'W'))
+
+ for (i = j = 0; (i < src_len) && (j < (dst_len - 1)); i++, j++) {
+ if ((i < src_len - 2) && (src[i] == '%')
+ && isxdigit((unsigned char)src[i + 1])
+ && isxdigit((unsigned char)src[i + 2])) {
+ a = tolower((unsigned char)src[i + 1]);
+ b = tolower((unsigned char)src[i + 2]);
+ dst[j] = (char)((HEXTOI(a) << 4) | HEXTOI(b));
+ i += 2;
+ } else if (is_form_url_encoded && (src[i] == '+')) {
+ dst[j] = ' ';
+ } else {
+ dst[j] = src[i];
+ }
+ }
+
+ dst[j] = '\0'; /* Null-terminate the destination */
+
+ return (i >= src_len) ? j : -1;
+}
+
+
+/* form url decoding of an entire string */
+static void
+url_decode_in_place(char *buf)
+{
+ int len = (int)strlen(buf);
+ (void)mg_url_decode(buf, len, buf, len + 1, 1);
+}
+
+
+CIVETWEB_API int
+mg_get_var(const char *data,
+ size_t data_len,
+ const char *name,
+ char *dst,
+ size_t dst_len)
+{
+ return mg_get_var2(data, data_len, name, dst, dst_len, 0);
+}
+
+
+CIVETWEB_API int
+mg_get_var2(const char *data,
+ size_t data_len,
+ const char *name,
+ char *dst,
+ size_t dst_len,
+ size_t occurrence)
+{
+ const char *p, *e, *s;
+ size_t name_len;
+ int len;
+
+ if ((dst == NULL) || (dst_len == 0)) {
+ len = -2;
+ } else if ((data == NULL) || (name == NULL) || (data_len == 0)) {
+ len = -1;
+ dst[0] = '\0';
+ } else {
+ name_len = strlen(name);
+ e = data + data_len;
+ len = -1;
+ dst[0] = '\0';
+
+ /* data is "var1=val1&var2=val2...". Find variable first */
+ for (p = data; p + name_len < e; p++) {
+ if (((p == data) || (p[-1] == '&')) && (p[name_len] == '=')
+ && !mg_strncasecmp(name, p, name_len) && 0 == occurrence--) {
+ /* Point p to variable value */
+ p += name_len + 1;
+
+ /* Point s to the end of the value */
+ s = (const char *)memchr(p, '&', (size_t)(e - p));
+ if (s == NULL) {
+ s = e;
+ }
+ DEBUG_ASSERT(s >= p);
+ if (s < p) {
+ return -3;
+ }
+
+ /* Decode variable into destination buffer */
+ len = mg_url_decode(p, (int)(s - p), dst, (int)dst_len, 1);
+
+ /* Redirect error code from -1 to -2 (destination buffer too
+ * small). */
+ if (len == -1) {
+ len = -2;
+ }
+ break;
+ }
+ }
+ }
+
+ return len;
+}
+
+
+/* split a string "key1=val1&key2=val2" into key/value pairs */
+CIVETWEB_API int
+mg_split_form_urlencoded(char *data,
+ struct mg_header *form_fields,
+ unsigned num_form_fields)
+{
+ char *b;
+ int i;
+ int num = 0;
+
+ if (data == NULL) {
+ /* parameter error */
+ return -1;
+ }
+
+ if ((form_fields == NULL) && (num_form_fields == 0)) {
+ /* determine the number of expected fields */
+ if (data[0] == 0) {
+ return 0;
+ }
+ /* count number of & to return the number of key-value-pairs */
+ num = 1;
+ while (*data) {
+ if (*data == '&') {
+ num++;
+ }
+ data++;
+ }
+ return num;
+ }
+
+ if ((form_fields == NULL) || ((int)num_form_fields <= 0)) {
+ /* parameter error */
+ return -1;
+ }
+
+ for (i = 0; i < (int)num_form_fields; i++) {
+ /* extract key-value pairs from input data */
+ while ((*data == ' ') || (*data == '\t')) {
+ /* skip initial spaces */
+ data++;
+ }
+ if (*data == 0) {
+ /* end of string reached */
+ break;
+ }
+ form_fields[num].name = data;
+
+ /* find & or = */
+ b = data;
+ while ((*b != 0) && (*b != '&') && (*b != '=')) {
+ b++;
+ }
+
+ if (*b == 0) {
+ /* last key without value */
+ form_fields[num].value = NULL;
+ } else if (*b == '&') {
+ /* mid key without value */
+ form_fields[num].value = NULL;
+ } else {
+ /* terminate string */
+ *b = 0;
+ /* value starts after '=' */
+ data = b + 1;
+ form_fields[num].value = data;
+ }
+
+ /* new field is stored */
+ num++;
+
+ /* find a next key */
+ b = strchr(data, '&');
+ if (b == 0) {
+ /* no more data */
+ break;
+ } else {
+ /* terminate value of last field at '&' */
+ *b = 0;
+ /* next key-value-pairs starts after '&' */
+ data = b + 1;
+ }
+ }
+
+ /* Decode all values */
+ for (i = 0; i < num; i++) {
+ if (form_fields[i].name) {
+ url_decode_in_place((char *)form_fields[i].name);
+ }
+ if (form_fields[i].value) {
+ url_decode_in_place((char *)form_fields[i].value);
+ }
+ }
+
+ /* return number of fields found */
+ return num;
+}
+
+
+/* HCP24: some changes to compare whole var_name */
+CIVETWEB_API int
+mg_get_cookie(const char *cookie_header,
+ const char *var_name,
+ char *dst,
+ size_t dst_size)
+{
+ const char *s, *p, *end;
+ int name_len, len = -1;
+
+ if ((dst == NULL) || (dst_size == 0)) {
+ return -2;
+ }
+
+ dst[0] = '\0';
+ if ((var_name == NULL) || ((s = cookie_header) == NULL)) {
+ return -1;
+ }
+
+ name_len = (int)strlen(var_name);
+ end = s + strlen(s);
+ for (; (s = mg_strcasestr(s, var_name)) != NULL; s += name_len) {
+ if (s[name_len] == '=') {
+ /* HCP24: now check is it a substring or a full cookie name */
+ if ((s == cookie_header) || (s[-1] == ' ')) {
+ s += name_len + 1;
+ if ((p = strchr(s, ' ')) == NULL) {
+ p = end;
+ }
+ if (p[-1] == ';') {
+ p--;
+ }
+ if ((*s == '"') && (p[-1] == '"') && (p > s + 1)) {
+ s++;
+ p--;
+ }
+ if ((size_t)(p - s) < dst_size) {
+ len = (int)(p - s);
+ mg_strlcpy(dst, s, (size_t)len + 1);
+ } else {
+ len = -3;
+ }
+ break;
+ }
+ }
+ }
+ return len;
+}
+
+
+CIVETWEB_API int
+mg_base64_encode(const unsigned char *src,
+ size_t src_len,
+ char *dst,
+ size_t *dst_len)
+{
+ static const char *b64 =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ size_t i, j;
+ int a, b, c;
+
+ if (dst_len != NULL) {
+ /* Expected length including 0 termination: */
+ /* IN 1 -> OUT 5, IN 2 -> OUT 5, IN 3 -> OUT 5, IN 4 -> OUT 9,
+ * IN 5 -> OUT 9, IN 6 -> OUT 9, IN 7 -> OUT 13, etc. */
+ size_t expected_len = ((src_len + 2) / 3) * 4 + 1;
+ if (*dst_len < expected_len) {
+ if (*dst_len > 0) {
+ dst[0] = '\0';
+ }
+ *dst_len = expected_len;
+ return 0;
+ }
+ }
+
+ for (i = j = 0; i < src_len; i += 3) {
+ a = src[i];
+ b = ((i + 1) >= src_len) ? 0 : src[i + 1];
+ c = ((i + 2) >= src_len) ? 0 : src[i + 2];
+
+ dst[j++] = b64[a >> 2];
+ dst[j++] = b64[((a & 3) << 4) | (b >> 4)];
+ if (i + 1 < src_len) {
+ dst[j++] = b64[(b & 15) << 2 | (c >> 6)];
+ }
+ if (i + 2 < src_len) {
+ dst[j++] = b64[c & 63];
+ }
+ }
+ while (j % 4 != 0) {
+ dst[j++] = '=';
+ }
+ dst[j++] = '\0';
+
+ if (dst_len != NULL) {
+ *dst_len = (size_t)j;
+ }
+
+ /* Return -1 for "OK" */
+ return -1;
+}
+
+
+static unsigned char
+b64reverse(char letter)
+{
+ if ((letter >= 'A') && (letter <= 'Z')) {
+ return (unsigned char)(letter - 'A');
+ }
+ if ((letter >= 'a') && (letter <= 'z')) {
+ return (unsigned char)(letter - 'a' + 26);
+ }
+ if ((letter >= '0') && (letter <= '9')) {
+ return (unsigned char)(letter - '0' + 52);
+ }
+ if (letter == '+') {
+ return 62;
+ }
+ if (letter == '/') {
+ return 63;
+ }
+ if (letter == '=') {
+ return 255; /* normal end */
+ }
+ return 254; /* error */
+}
+
+
+CIVETWEB_API int
+mg_base64_decode(const char *src,
+ size_t src_len,
+ unsigned char *dst,
+ size_t *dst_len)
+{
+ size_t i;
+ unsigned char a, b, c, d;
+ size_t dst_len_limit = (size_t)-1;
+ size_t dst_len_used = 0;
+
+ if (dst_len != NULL) {
+ dst_len_limit = *dst_len;
+ *dst_len = 0;
+ }
+
+ for (i = 0; i < src_len; i += 4) {
+ /* Read 4 characters from BASE64 string */
+ a = b64reverse(src[i]);
+ if (a >= 254) {
+ return (int)i;
+ }
+
+ b = b64reverse(((i + 1) >= src_len) ? 0 : src[i + 1]);
+ if (b >= 254) {
+ return (int)i + 1;
+ }
+
+ c = b64reverse(((i + 2) >= src_len) ? 0 : src[i + 2]);
+ if (c == 254) {
+ return (int)i + 2;
+ }
+
+ d = b64reverse(((i + 3) >= src_len) ? 0 : src[i + 3]);
+ if (d == 254) {
+ return (int)i + 3;
+ }
+
+ /* Add first (of 3) decoded character */
+ if (dst_len_used < dst_len_limit) {
+ dst[dst_len_used] = (unsigned char)((unsigned char)(a << 2)
+ + (unsigned char)(b >> 4));
+ }
+ dst_len_used++;
+
+ if (c != 255) {
+ if (dst_len_used < dst_len_limit) {
+
+ dst[dst_len_used] = (unsigned char)((unsigned char)(b << 4)
+ + (unsigned char)(c >> 2));
+ }
+ dst_len_used++;
+ if (d != 255) {
+ if (dst_len_used < dst_len_limit) {
+ dst[dst_len_used] =
+ (unsigned char)((unsigned char)(c << 6) + d);
+ }
+ dst_len_used++;
+ }
+ }
+ }
+
+ /* Add terminating zero */
+ if (dst_len_used < dst_len_limit) {
+ dst[dst_len_used] = '\0';
+ }
+ dst_len_used++;
+ if (dst_len != NULL) {
+ *dst_len = dst_len_used;
+ }
+
+ if (dst_len_used > dst_len_limit) {
+ /* Out of memory */
+ return 0;
+ }
+
+ /* Return -1 for "OK" */
+ return -1;
+}
+
+
+static int
+is_put_or_delete_method(const struct mg_connection *conn)
+{
+ if (conn) {
+ const char *s = conn->request_info.request_method;
+ if (s != NULL) {
+ /* PUT, DELETE, MKCOL, PATCH, LOCK, UNLOCK, PROPPATCH, MOVE, COPY */
+ return (!strcmp(s, "PUT") || !strcmp(s, "DELETE")
+ || !strcmp(s, "MKCOL") || !strcmp(s, "PATCH")
+ || !strcmp(s, "LOCK") || !strcmp(s, "UNLOCK")
+ || !strcmp(s, "PROPPATCH") || !strcmp(s, "MOVE")
+ || !strcmp(s, "COPY"));
+ }
+ }
+ return 0;
+}
+
+
+static int
+is_civetweb_webdav_method(const struct mg_connection *conn)
+{
+ /* Note: Here we only have to identify the WebDav methods that need special
+ * handling in the CivetWeb code - not all methods used in WebDav. In
+ * particular, methods used on directories (when using Windows Explorer as
+ * WebDav client).
+ */
+ if (conn) {
+ const char *s = conn->request_info.request_method;
+ if (s != NULL) {
+ /* These are the civetweb builtin DAV methods */
+ return (!strcmp(s, "PROPFIND") || !strcmp(s, "PROPPATCH")
+ || !strcmp(s, "LOCK") || !strcmp(s, "UNLOCK")
+ || !strcmp(s, "MOVE") || !strcmp(s, "COPY"));
+ }
+ }
+ return 0;
+}
+
+
+#if !defined(NO_FILES)
+static int
+extention_matches_script(
+ struct mg_connection *conn, /* in: request (must be valid) */
+ const char *filename /* in: filename (must be valid) */
+)
+{
+#if !defined(NO_CGI)
+ int cgi_config_idx, inc, max;
+#endif
+
+#if defined(USE_LUA)
+ if (match_prefix_strlen(conn->dom_ctx->config[LUA_SCRIPT_EXTENSIONS],
+ filename)
+ > 0) {
+ return 1;
+ }
+#endif
+#if defined(USE_DUKTAPE)
+ if (match_prefix_strlen(conn->dom_ctx->config[DUKTAPE_SCRIPT_EXTENSIONS],
+ filename)
+ > 0) {
+ return 1;
+ }
+#endif
+#if !defined(NO_CGI)
+ inc = CGI2_EXTENSIONS - CGI_EXTENSIONS;
+ max = PUT_DELETE_PASSWORDS_FILE - CGI_EXTENSIONS;
+ for (cgi_config_idx = 0; cgi_config_idx < max; cgi_config_idx += inc) {
+ if ((conn->dom_ctx->config[CGI_EXTENSIONS + cgi_config_idx] != NULL)
+ && (match_prefix_strlen(
+ conn->dom_ctx->config[CGI_EXTENSIONS + cgi_config_idx],
+ filename)
+ > 0)) {
+ return 1;
+ }
+ }
+#endif
+ /* filename and conn could be unused, if all preocessor conditions
+ * are false (no script language supported). */
+ (void)filename;
+ (void)conn;
+
+ return 0;
+}
+
+
+static int
+extention_matches_template_text(
+ struct mg_connection *conn, /* in: request (must be valid) */
+ const char *filename /* in: filename (must be valid) */
+)
+{
+#if defined(USE_LUA)
+ if (match_prefix_strlen(conn->dom_ctx->config[LUA_SERVER_PAGE_EXTENSIONS],
+ filename)
+ > 0) {
+ return 1;
+ }
+#endif
+ if (match_prefix_strlen(conn->dom_ctx->config[SSI_EXTENSIONS], filename)
+ > 0) {
+ return 1;
+ }
+ return 0;
+}
+
+
+/* For given directory path, substitute it to valid index file.
+ * Return 1 if index file has been found, 0 if not found.
+ * If the file is found, it's stats is returned in stp. */
+static int
+substitute_index_file(struct mg_connection *conn,
+ char *path,
+ size_t path_len,
+ struct mg_file_stat *filestat)
+{
+ const char *list = conn->dom_ctx->config[INDEX_FILES];
+ struct vec filename_vec;
+ size_t n = strlen(path);
+ int found = 0;
+
+ /* The 'path' given to us points to the directory. Remove all trailing
+ * directory separator characters from the end of the path, and
+ * then append single directory separator character. */
+ while ((n > 0) && (path[n - 1] == '/')) {
+ n--;
+ }
+ path[n] = '/';
+
+ /* Traverse index files list. For each entry, append it to the given
+ * path and see if the file exists. If it exists, break the loop */
+ while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
+ /* Ignore too long entries that may overflow path buffer */
+ if ((filename_vec.len + 1) > (path_len - (n + 1))) {
+ continue;
+ }
+
+ /* Prepare full path to the index file */
+ mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
+
+ /* Does it exist? */
+ if (mg_stat(conn, path, filestat)) {
+ /* Yes it does, break the loop */
+ found = 1;
+ break;
+ }
+ }
+
+ /* If no index file exists, restore directory path */
+ if (!found) {
+ path[n] = '\0';
+ }
+
+ return found;
+}
+#endif
+
+
+static void
+interpret_uri(struct mg_connection *conn, /* in/out: request (must be valid) */
+ char *filename, /* out: filename */
+ size_t filename_buf_len, /* in: size of filename buffer */
+ struct mg_file_stat *filestat, /* out: file status structure */
+ int *is_found, /* out: file found (directly) */
+ int *is_script_resource, /* out: handled by a script? */
+ int *is_websocket_request, /* out: websocket connection? */
+ int *is_put_or_delete_request, /* out: put/delete a file? */
+ int *is_webdav_request, /* out: webdav request? */
+ int *is_template_text /* out: SSI file or LSP file? */
+)
+{
+ char const *accept_encoding;
+
+#if !defined(NO_FILES)
+ const char *uri = conn->request_info.local_uri;
+ const char *root = conn->dom_ctx->config[DOCUMENT_ROOT];
+ const char *rewrite;
+ struct vec a, b;
+ ptrdiff_t match_len;
+ char gz_path[UTF8_PATH_MAX];
+ int truncated;
+#if !defined(NO_CGI) || defined(USE_LUA) || defined(USE_DUKTAPE)
+ char *tmp_str;
+ size_t tmp_str_len, sep_pos;
+ int allow_substitute_script_subresources;
+#endif
+#else
+ (void)filename_buf_len; /* unused if NO_FILES is defined */
+#endif
+
+ /* Step 1: Set all initially unknown outputs to zero */
+ memset(filestat, 0, sizeof(*filestat));
+ *filename = 0;
+ *is_found = 0;
+ *is_script_resource = 0;
+ *is_template_text = 0;
+
+ /* Step 2: Classify the request method */
+ /* Step 2a: Check if the request attempts to modify the file system */
+ *is_put_or_delete_request = is_put_or_delete_method(conn);
+ /* Step 2b: Check if the request uses WebDav method that requires special
+ * handling */
+ *is_webdav_request = is_civetweb_webdav_method(conn);
+
+ /* Step 3: Check if it is a websocket request, and modify the document
+ * root if required */
+#if defined(USE_WEBSOCKET)
+ *is_websocket_request = (conn->protocol_type == PROTOCOL_TYPE_WEBSOCKET);
+#if !defined(NO_FILES)
+ if ((*is_websocket_request) && conn->dom_ctx->config[WEBSOCKET_ROOT]) {
+ root = conn->dom_ctx->config[WEBSOCKET_ROOT];
+ }
+#endif /* !NO_FILES */
+#else /* USE_WEBSOCKET */
+ *is_websocket_request = 0;
+#endif /* USE_WEBSOCKET */
+
+ /* Step 4: Check if gzip encoded response is allowed */
+ conn->accept_gzip = 0;
+ if ((accept_encoding = mg_get_header(conn, "Accept-Encoding")) != NULL) {
+ if (strstr(accept_encoding, "gzip") != NULL) {
+ conn->accept_gzip = 1;
+ }
+ }
+
+#if !defined(NO_FILES)
+ /* Step 5: If there is no root directory, don't look for files. */
+ /* Note that root == NULL is a regular use case here. This occurs,
+ * if all requests are handled by callbacks, so the WEBSOCKET_ROOT
+ * config is not required. */
+ if (root == NULL) {
+ /* all file related outputs have already been set to 0, just return
+ */
+ return;
+ }
+
+ /* Step 6: Determine the local file path from the root path and the
+ * request uri. */
+ /* Using filename_buf_len - 1 because memmove() for PATH_INFO may shift
+ * part of the path one byte on the right. */
+ truncated = 0;
+ mg_snprintf(
+ conn, &truncated, filename, filename_buf_len - 1, "%s%s", root, uri);
+
+ if (truncated) {
+ goto interpret_cleanup;
+ }
+
+ /* Step 7: URI rewriting */
+ rewrite = conn->dom_ctx->config[URL_REWRITE_PATTERN];
+ while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
+ if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
+ mg_snprintf(conn,
+ &truncated,
+ filename,
+ filename_buf_len - 1,
+ "%.*s%s",
+ (int)b.len,
+ b.ptr,
+ uri + match_len);
+ break;
+ }
+ }
+
+ if (truncated) {
+ goto interpret_cleanup;
+ }
+
+ /* Step 8: Check if the file exists at the server */
+ /* Local file path and name, corresponding to requested URI
+ * is now stored in "filename" variable. */
+ if (mg_stat(conn, filename, filestat)) {
+ int uri_len = (int)strlen(uri);
+ int is_uri_end_slash = (uri_len > 0) && (uri[uri_len - 1] == '/');
+
+ /* 8.1: File exists. */
+ *is_found = 1;
+
+ /* 8.2: Check if it is a script type. */
+ if (extention_matches_script(conn, filename)) {
+ /* The request addresses a CGI resource, Lua script or
+ * server-side javascript.
+ * The URI corresponds to the script itself (like
+ * /path/script.cgi), and there is no additional resource
+ * path (like /path/script.cgi/something).
+ * Requests that modify (replace or delete) a resource, like
+ * PUT and DELETE requests, should replace/delete the script
+ * file.
+ * Requests that read or write from/to a resource, like GET and
+ * POST requests, should call the script and return the
+ * generated response. */
+ *is_script_resource = (!*is_put_or_delete_request);
+ }
+
+ /* 8.3: Check for SSI and LSP files */
+ if (extention_matches_template_text(conn, filename)) {
+ /* Same as above, but for *.lsp and *.shtml files. */
+ /* A "template text" is a file delivered directly to the client,
+ * but with some text tags replaced by dynamic content.
+ * E.g. a Server Side Include (SSI) or Lua Page/Lua Server Page
+ * (LP, LSP) file. */
+ *is_template_text = (!*is_put_or_delete_request);
+ }
+
+ /* 8.4: If the request target is a directory, there could be
+ * a substitute file (index.html, index.cgi, ...). */
+ /* But do not substitute a directory for a WebDav request */
+ if (filestat->is_directory && is_uri_end_slash
+ && (!*is_webdav_request)) {
+ /* Use a local copy here, since substitute_index_file will
+ * change the content of the file status */
+ struct mg_file_stat tmp_filestat;
+ memset(&tmp_filestat, 0, sizeof(tmp_filestat));
+
+ if (substitute_index_file(
+ conn, filename, filename_buf_len, &tmp_filestat)) {
+
+ /* Substitute file found. Copy stat to the output, then
+ * check if the file is a script file */
+ *filestat = tmp_filestat;
+
+ if (extention_matches_script(conn, filename)) {
+ /* Substitute file is a script file */
+ *is_script_resource = 1;
+ } else if (extention_matches_template_text(conn, filename)) {
+ /* Substitute file is a LSP or SSI file */
+ *is_template_text = 1;
+ } else {
+ /* Substitute file is a regular file */
+ *is_script_resource = 0;
+ *is_found = (mg_stat(conn, filename, filestat) ? 1 : 0);
+ }
+ }
+ /* If there is no substitute file, the server could return
+ * a directory listing in a later step */
+ }
+ return;
+ }
+
+ /* Step 9: Check for zipped files: */
+ /* If we can't find the actual file, look for the file
+ * with the same name but a .gz extension. If we find it,
+ * use that and set the gzipped flag in the file struct
+ * to indicate that the response need to have the content-
+ * encoding: gzip header.
+ * We can only do this if the browser declares support. */
+ if (conn->accept_gzip) {
+ mg_snprintf(
+ conn, &truncated, gz_path, sizeof(gz_path), "%s.gz", filename);
+
+ if (truncated) {
+ goto interpret_cleanup;
+ }
+
+ if (mg_stat(conn, gz_path, filestat)) {
+ if (filestat) {
+ filestat->is_gzipped = 1;
+ *is_found = 1;
+ }
+ /* Currently gz files can not be scripts. */
+ return;
+ }
+ }
+
+#if !defined(NO_CGI) || defined(USE_LUA) || defined(USE_DUKTAPE)
+ /* Step 10: Script resources may handle sub-resources */
+ /* Support PATH_INFO for CGI scripts. */
+ tmp_str_len = strlen(filename);
+ tmp_str =
+ (char *)mg_malloc_ctx(tmp_str_len + UTF8_PATH_MAX + 1, conn->phys_ctx);
+ if (!tmp_str) {
+ /* Out of memory */
+ goto interpret_cleanup;
+ }
+ memcpy(tmp_str, filename, tmp_str_len + 1);
+
+ /* Check config, if index scripts may have sub-resources */
+ allow_substitute_script_subresources =
+ !mg_strcasecmp(conn->dom_ctx->config[ALLOW_INDEX_SCRIPT_SUB_RES],
+ "yes");
+ if (*is_webdav_request) {
+ /* TO BE DEFINED: Should scripts handle special WebDAV methods lile
+ * PROPFIND for their subresources? */
+ /* allow_substitute_script_subresources = 0; */
+ }
+
+ sep_pos = tmp_str_len;
+ while (sep_pos > 0) {
+ sep_pos--;
+ if (tmp_str[sep_pos] == '/') {
+ int is_script = 0, does_exist = 0;
+
+ tmp_str[sep_pos] = 0;
+ if (tmp_str[0]) {
+ is_script = extention_matches_script(conn, tmp_str);
+ does_exist = mg_stat(conn, tmp_str, filestat);
+ }
+
+ if (does_exist && is_script) {
+ filename[sep_pos] = 0;
+ memmove(filename + sep_pos + 2,
+ filename + sep_pos + 1,
+ strlen(filename + sep_pos + 1) + 1);
+ conn->path_info = filename + sep_pos + 1;
+ filename[sep_pos + 1] = '/';
+ *is_script_resource = 1;
+ *is_found = 1;
+ break;
+ }
+
+ if (allow_substitute_script_subresources) {
+ if (substitute_index_file(
+ conn, tmp_str, tmp_str_len + UTF8_PATH_MAX, filestat)) {
+
+ /* some intermediate directory has an index file */
+ if (extention_matches_script(conn, tmp_str)) {
+
+ size_t script_name_len = strlen(tmp_str);
+
+ /* subres_name read before this memory locatio will be
+ overwritten */
+ char *subres_name = filename + sep_pos;
+ size_t subres_name_len = strlen(subres_name);
+
+ DEBUG_TRACE("Substitute script %s serving path %s",
+ tmp_str,
+ filename);
+
+ /* this index file is a script */
+ if ((script_name_len + subres_name_len + 2)
+ >= filename_buf_len) {
+ mg_free(tmp_str);
+ goto interpret_cleanup;
+ }
+
+ conn->path_info =
+ filename + script_name_len + 1; /* new target */
+ memmove(conn->path_info, subres_name, subres_name_len);
+ conn->path_info[subres_name_len] = 0;
+ memcpy(filename, tmp_str, script_name_len + 1);
+
+ *is_script_resource = 1;
+ *is_found = 1;
+ break;
+
+ } else {
+
+ DEBUG_TRACE("Substitute file %s serving path %s",
+ tmp_str,
+ filename);
+
+ /* non-script files will not have sub-resources */
+ filename[sep_pos] = 0;
+ conn->path_info = 0;
+ *is_script_resource = 0;
+ *is_found = 0;
+ break;
+ }
+ }
+ }
+
+ tmp_str[sep_pos] = '/';
+ }
+ }
+
+ mg_free(tmp_str);
+
+#endif /* !defined(NO_CGI) || defined(USE_LUA) || defined(USE_DUKTAPE) */
+#endif /* !defined(NO_FILES) */
+ return;
+
+#if !defined(NO_FILES)
+/* Reset all outputs */
+interpret_cleanup:
+ memset(filestat, 0, sizeof(*filestat));
+ *filename = 0;
+ *is_found = 0;
+ *is_script_resource = 0;
+ *is_websocket_request = 0;
+ *is_put_or_delete_request = 0;
+#endif /* !defined(NO_FILES) */
+}
+
+
+/* Check whether full request is buffered. Return:
+ * -1 if request or response is malformed
+ * 0 if request or response is not yet fully buffered
+ * >0 actual request length, including last \r\n\r\n */
+static int
+get_http_header_len(const char *buf, int buflen)
+{
+ int i;
+ for (i = 0; i < buflen; i++) {
+ /* Do an unsigned comparison in some conditions below */
+ const unsigned char c = (unsigned char)buf[i];
+
+ if ((c < 128) && ((char)c != '\r') && ((char)c != '\n')
+ && !isprint(c)) {
+ /* abort scan as soon as one malformed character is found */
+ return -1;
+ }
+
+ if (i < buflen - 1) {
+ if ((buf[i] == '\n') && (buf[i + 1] == '\n')) {
+ /* Two newline, no carriage return - not standard compliant,
+ * but it should be accepted */
+ return i + 2;
+ }
+ }
+
+ if (i < buflen - 3) {
+ if ((buf[i] == '\r') && (buf[i + 1] == '\n') && (buf[i + 2] == '\r')
+ && (buf[i + 3] == '\n')) {
+ /* Two \r\n - standard compliant */
+ return i + 4;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+#if !defined(NO_CACHING)
+/* Convert month to the month number. Return -1 on error, or month number */
+static int
+get_month_index(const char *s)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(month_names); i++) {
+ if (!strcmp(s, month_names[i])) {
+ return (int)i;
+ }
+ }
+
+ return -1;
+}
+
+
+/* Parse UTC date-time string, and return the corresponding time_t value. */
+static time_t
+parse_date_string(const char *datetime)
+{
+ char month_str[32] = {0};
+ int second, minute, hour, day, month, year;
+ time_t result = (time_t)0;
+ struct tm tm;
+
+ if ((sscanf(datetime,
+ "%d/%3s/%d %d:%d:%d",
+ &day,
+ month_str,
+ &year,
+ &hour,
+ &minute,
+ &second)
+ == 6)
+ || (sscanf(datetime,
+ "%d %3s %d %d:%d:%d",
+ &day,
+ month_str,
+ &year,
+ &hour,
+ &minute,
+ &second)
+ == 6)
+ || (sscanf(datetime,
+ "%*3s, %d %3s %d %d:%d:%d",
+ &day,
+ month_str,
+ &year,
+ &hour,
+ &minute,
+ &second)
+ == 6)
+ || (sscanf(datetime,
+ "%d-%3s-%d %d:%d:%d",
+ &day,
+ month_str,
+ &year,
+ &hour,
+ &minute,
+ &second)
+ == 6)) {
+ month = get_month_index(month_str);
+ if ((month >= 0) && (year >= 1970)) {
+ memset(&tm, 0, sizeof(tm));
+ tm.tm_year = year - 1900;
+ tm.tm_mon = month;
+ tm.tm_mday = day;
+ tm.tm_hour = hour;
+ tm.tm_min = minute;
+ tm.tm_sec = second;
+ result = timegm(&tm);
+ }
+ }
+
+ return result;
+}
+#endif /* !NO_CACHING */
+
+
+/* Pre-process URIs according to RFC + protect against directory disclosure
+ * attacks by removing '..', excessive '/' and '\' characters */
+static void
+remove_dot_segments(char *inout)
+{
+ /* Windows backend protection
+ * (https://tools.ietf.org/html/rfc3986#section-7.3): Replace backslash
+ * in URI by slash */
+ char *out_end = inout;
+ char *in = inout;
+
+ if (!in) {
+ /* Param error. */
+ return;
+ }
+
+ while (*in) {
+ if (*in == '\\') {
+ *in = '/';
+ }
+ in++;
+ }
+
+ /* Algorithm "remove_dot_segments" from
+ * https://tools.ietf.org/html/rfc3986#section-5.2.4 */
+ /* Step 1:
+ * The input buffer is initialized.
+ * The output buffer is initialized to the empty string.
+ */
+ in = inout;
+
+ /* Step 2:
+ * While the input buffer is not empty, loop as follows:
+ */
+ /* Less than out_end of the inout buffer is used as output, so keep
+ * condition: out_end <= in */
+ while (*in) {
+ /* Step 2a:
+ * If the input buffer begins with a prefix of "../" or "./",
+ * then remove that prefix from the input buffer;
+ */
+ if (!strncmp(in, "../", 3)) {
+ in += 3;
+ } else if (!strncmp(in, "./", 2)) {
+ in += 2;
+ }
+ /* otherwise */
+ /* Step 2b:
+ * if the input buffer begins with a prefix of "/./" or "/.",
+ * where "." is a complete path segment, then replace that
+ * prefix with "/" in the input buffer;
+ */
+ else if (!strncmp(in, "/./", 3)) {
+ in += 2;
+ } else if (!strcmp(in, "/.")) {
+ in[1] = 0;
+ }
+ /* otherwise */
+ /* Step 2c:
+ * if the input buffer begins with a prefix of "/../" or "/..",
+ * where ".." is a complete path segment, then replace that
+ * prefix with "/" in the input buffer and remove the last
+ * segment and its preceding "/" (if any) from the output
+ * buffer;
+ */
+ else if (!strncmp(in, "/../", 4)) {
+ in += 3;
+ if (inout != out_end) {
+ /* remove last segment */
+ do {
+ out_end--;
+ } while ((inout != out_end) && (*out_end != '/'));
+ }
+ } else if (!strcmp(in, "/..")) {
+ in[1] = 0;
+ if (inout != out_end) {
+ /* remove last segment */
+ do {
+ out_end--;
+ } while ((inout != out_end) && (*out_end != '/'));
+ }
+ }
+ /* otherwise */
+ /* Step 2d:
+ * if the input buffer consists only of "." or "..", then remove
+ * that from the input buffer;
+ */
+ else if (!strcmp(in, ".") || !strcmp(in, "..")) {
+ *in = 0;
+ }
+ /* otherwise */
+ /* Step 2e:
+ * move the first path segment in the input buffer to the end of
+ * the output buffer, including the initial "/" character (if
+ * any) and any subsequent characters up to, but not including,
+ * the next "/" character or the end of the input buffer.
+ */
+ else {
+ do {
+ *out_end = *in;
+ out_end++;
+ in++;
+ } while ((*in != 0) && (*in != '/'));
+ }
+ }
+
+ /* Step 3:
+ * Finally, the output buffer is returned as the result of
+ * remove_dot_segments.
+ */
+ /* Terminate output */
+ *out_end = 0;
+
+ /* For Windows, the files/folders "x" and "x." (with a dot but without
+ * extension) are identical. Replace all "./" by "/" and remove a "." at
+ * the end. Also replace all "//" by "/". Repeat until there is no "./"
+ * or "//" anymore.
+ */
+ out_end = in = inout;
+ while (*in) {
+ if (*in == '.') {
+ /* remove . at the end or preceding of / */
+ char *in_ahead = in;
+ do {
+ in_ahead++;
+ } while (*in_ahead == '.');
+ if (*in_ahead == '/') {
+ in = in_ahead;
+ if ((out_end != inout) && (out_end[-1] == '/')) {
+ /* remove generated // */
+ out_end--;
+ }
+ } else if (*in_ahead == 0) {
+ in = in_ahead;
+ } else {
+ do {
+ *out_end++ = '.';
+ in++;
+ } while (in != in_ahead);
+ }
+ } else if (*in == '/') {
+ /* replace // by / */
+ *out_end++ = '/';
+ do {
+ in++;
+ } while (*in == '/');
+ } else {
+ *out_end++ = *in;
+ in++;
+ }
+ }
+ *out_end = 0;
+}
+
+
+static const struct {
+ const char *extension;
+ size_t ext_len;
+ const char *mime_type;
+} builtin_mime_types[] = {
+ /* IANA registered MIME types
+ * (http://www.iana.org/assignments/media-types)
+ * application types */
+ {".bin", 4, "application/octet-stream"},
+ {".deb", 4, "application/octet-stream"},
+ {".dmg", 4, "application/octet-stream"},
+ {".dll", 4, "application/octet-stream"},
+ {".doc", 4, "application/msword"},
+ {".eps", 4, "application/postscript"},
+ {".exe", 4, "application/octet-stream"},
+ {".iso", 4, "application/octet-stream"},
+ {".js", 3, "application/javascript"},
+ {".json", 5, "application/json"},
+ {".msi", 4, "application/octet-stream"},
+ {".pdf", 4, "application/pdf"},
+ {".ps", 3, "application/postscript"},
+ {".rtf", 4, "application/rtf"},
+ {".xhtml", 6, "application/xhtml+xml"},
+ {".xsl", 4, "application/xml"},
+ {".xslt", 5, "application/xml"},
+
+ /* fonts */
+ {".ttf", 4, "application/font-sfnt"},
+ {".cff", 4, "application/font-sfnt"},
+ {".otf", 4, "application/font-sfnt"},
+ {".aat", 4, "application/font-sfnt"},
+ {".sil", 4, "application/font-sfnt"},
+ {".pfr", 4, "application/font-tdpfr"},
+ {".woff", 5, "application/font-woff"},
+ {".woff2", 6, "application/font-woff2"},
+
+ /* audio */
+ {".mp3", 4, "audio/mpeg"},
+ {".oga", 4, "audio/ogg"},
+ {".ogg", 4, "audio/ogg"},
+
+ /* image */
+ {".gif", 4, "image/gif"},
+ {".ief", 4, "image/ief"},
+ {".jpeg", 5, "image/jpeg"},
+ {".jpg", 4, "image/jpeg"},
+ {".jpm", 4, "image/jpm"},
+ {".jpx", 4, "image/jpx"},
+ {".png", 4, "image/png"},
+ {".svg", 4, "image/svg+xml"},
+ {".tif", 4, "image/tiff"},
+ {".tiff", 5, "image/tiff"},
+
+ /* model */
+ {".wrl", 4, "model/vrml"},
+
+ /* text */
+ {".css", 4, "text/css"},
+ {".csv", 4, "text/csv"},
+ {".htm", 4, "text/html"},
+ {".html", 5, "text/html"},
+ {".sgm", 4, "text/sgml"},
+ {".shtm", 5, "text/html"},
+ {".shtml", 6, "text/html"},
+ {".txt", 4, "text/plain"},
+ {".xml", 4, "text/xml"},
+
+ /* video */
+ {".mov", 4, "video/quicktime"},
+ {".mp4", 4, "video/mp4"},
+ {".mpeg", 5, "video/mpeg"},
+ {".mpg", 4, "video/mpeg"},
+ {".ogv", 4, "video/ogg"},
+ {".qt", 3, "video/quicktime"},
+
+ /* not registered types
+ * (http://reference.sitepoint.com/html/mime-types-full,
+ * http://www.hansenb.pdx.edu/DMKB/dict/tutorials/mime_typ.php, ..) */
+ {".arj", 4, "application/x-arj-compressed"},
+ {".gz", 3, "application/x-gunzip"},
+ {".rar", 4, "application/x-arj-compressed"},
+ {".swf", 4, "application/x-shockwave-flash"},
+ {".tar", 4, "application/x-tar"},
+ {".tgz", 4, "application/x-tar-gz"},
+ {".torrent", 8, "application/x-bittorrent"},
+ {".ppt", 4, "application/x-mspowerpoint"},
+ {".xls", 4, "application/x-msexcel"},
+ {".zip", 4, "application/x-zip-compressed"},
+ {".aac",
+ 4,
+ "audio/aac"}, /* http://en.wikipedia.org/wiki/Advanced_Audio_Coding */
+ {".flac", 5, "audio/flac"},
+ {".aif", 4, "audio/x-aif"},
+ {".m3u", 4, "audio/x-mpegurl"},
+ {".mid", 4, "audio/x-midi"},
+ {".ra", 3, "audio/x-pn-realaudio"},
+ {".ram", 4, "audio/x-pn-realaudio"},
+ {".wav", 4, "audio/x-wav"},
+ {".bmp", 4, "image/bmp"},
+ {".ico", 4, "image/x-icon"},
+ {".pct", 4, "image/x-pct"},
+ {".pict", 5, "image/pict"},
+ {".rgb", 4, "image/x-rgb"},
+ {".webm", 5, "video/webm"}, /* http://en.wikipedia.org/wiki/WebM */
+ {".asf", 4, "video/x-ms-asf"},
+ {".avi", 4, "video/x-msvideo"},
+ {".m4v", 4, "video/x-m4v"},
+ {NULL, 0, NULL}};
+
+
+CIVETWEB_API const char *
+mg_get_builtin_mime_type(const char *path)
+{
+ const char *ext;
+ size_t i, path_len;
+
+ path_len = strlen(path);
+
+ for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
+ ext = path + (path_len - builtin_mime_types[i].ext_len);
+ if ((path_len > builtin_mime_types[i].ext_len)
+ && (mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0)) {
+ return builtin_mime_types[i].mime_type;
+ }
+ }
+
+ return "text/plain";
+}
+
+
+/* Look at the "path" extension and figure what mime type it has.
+ * Store mime type in the vector. */
+static void
+get_mime_type(struct mg_connection *conn, const char *path, struct vec *vec)
+{
+ struct vec ext_vec, mime_vec;
+ const char *list, *ext;
+ size_t path_len;
+
+ path_len = strlen(path);
+
+ if ((conn == NULL) || (vec == NULL)) {
+ if (vec != NULL) {
+ memset(vec, '\0', sizeof(struct vec));
+ }
+ return;
+ }
+
+ /* Scan user-defined mime types first, in case user wants to
+ * override default mime types. */
+ list = conn->dom_ctx->config[EXTRA_MIME_TYPES];
+ while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
+ /* ext now points to the path suffix */
+ ext = path + path_len - ext_vec.len;
+ if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
+ *vec = mime_vec;
+ return;
+ }
+ }
+
+ vec->ptr = mg_get_builtin_mime_type(path);
+ vec->len = strlen(vec->ptr);
+}
+
+
+/* Stringify binary data. Output buffer must be twice as big as input,
+ * because each byte takes 2 bytes in string representation */
+static void
+bin2str(char *to, const unsigned char *p, size_t len)
+{
+ static const char *hex = "0123456789abcdef";
+
+ for (; len--; p++) {
+ *to++ = hex[p[0] >> 4];
+ *to++ = hex[p[0] & 0x0f];
+ }
+ *to = '\0';
+}
+
+
+/* Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
+ */
+CIVETWEB_API char *
+mg_md5(char buf[33], ...)
+{
+ md5_byte_t hash[16];
+ const char *p;
+ va_list ap;
+ md5_state_t ctx;
+
+ md5_init(&ctx);
+
+ va_start(ap, buf);
+ while ((p = va_arg(ap, const char *)) != NULL) {
+ md5_append(&ctx, (const md5_byte_t *)p, strlen(p));
+ }
+ va_end(ap);
+
+ md5_finish(&ctx, hash);
+ bin2str(buf, hash, sizeof(hash));
+ return buf;
+}
+
+
+/* Check the user's password, return 1 if OK */
+static int
+check_password_digest(const char *method,
+ const char *ha1,
+ const char *uri,
+ const char *nonce,
+ const char *nc,
+ const char *cnonce,
+ const char *qop,
+ const char *response)
+{
+ char ha2[32 + 1], expected_response[32 + 1];
+
+ /* Some of the parameters may be NULL */
+ if ((method == NULL) || (nonce == NULL) || (nc == NULL) || (cnonce == NULL)
+ || (qop == NULL) || (response == NULL)) {
+ return 0;
+ }
+
+ /* NOTE(lsm): due to a bug in MSIE, we do not compare the URI */
+ if (strlen(response) != 32) {
+ return 0;
+ }
+
+ mg_md5(ha2, method, ":", uri, NULL);
+ mg_md5(expected_response,
+ ha1,
+ ":",
+ nonce,
+ ":",
+ nc,
+ ":",
+ cnonce,
+ ":",
+ qop,
+ ":",
+ ha2,
+ NULL);
+
+ return mg_strcasecmp(response, expected_response) == 0;
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+/* Use the global passwords file, if specified by auth_gpass option,
+ * or search for .htpasswd in the requested directory. */
+static void
+open_auth_file(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *filep)
+{
+ if ((conn != NULL) && (conn->dom_ctx != NULL)) {
+ char name[UTF8_PATH_MAX];
+ const char *p, *e,
+ *gpass = conn->dom_ctx->config[GLOBAL_PASSWORDS_FILE];
+ int truncated;
+
+ if (gpass != NULL) {
+ /* Use global passwords file */
+ if (!mg_fopen(conn, gpass, MG_FOPEN_MODE_READ, filep)) {
+#if defined(DEBUG)
+ /* Use mg_cry_internal here, since gpass has been
+ * configured. */
+ mg_cry_internal(conn, "fopen(%s): %s", gpass, strerror(ERRNO));
+#endif
+ }
+ /* Important: using local struct mg_file to test path for
+ * is_directory flag. If filep is used, mg_stat() makes it
+ * appear as if auth file was opened.
+ * TODO(mid): Check if this is still required after rewriting
+ * mg_stat */
+ } else if (mg_stat(conn, path, &filep->stat)
+ && filep->stat.is_directory) {
+ mg_snprintf(conn,
+ &truncated,
+ name,
+ sizeof(name),
+ "%s/%s",
+ path,
+ PASSWORDS_FILE_NAME);
+
+ if (truncated || !mg_fopen(conn, name, MG_FOPEN_MODE_READ, filep)) {
+#if defined(DEBUG)
+ /* Don't use mg_cry_internal here, but only a trace, since
+ * this is a typical case. It will occur for every directory
+ * without a password file. */
+ DEBUG_TRACE("fopen(%s): %s", name, strerror(ERRNO));
+#endif
+ }
+ } else {
+ /* Try to find .htpasswd in requested directory. */
+ for (p = path, e = p + strlen(p) - 1; e > p; e--) {
+ if (e[0] == '/') {
+ break;
+ }
+ }
+ mg_snprintf(conn,
+ &truncated,
+ name,
+ sizeof(name),
+ "%.*s/%s",
+ (int)(e - p),
+ p,
+ PASSWORDS_FILE_NAME);
+
+ if (truncated || !mg_fopen(conn, name, MG_FOPEN_MODE_READ, filep)) {
+#if defined(DEBUG)
+ /* Don't use mg_cry_internal here, but only a trace, since
+ * this is a typical case. It will occur for every directory
+ * without a password file. */
+ DEBUG_TRACE("fopen(%s): %s", name, strerror(ERRNO));
+#endif
+ }
+ }
+ }
+}
+#endif /* NO_FILESYSTEMS */
+
+
+/* Parsed Authorization header */
+struct ah {
+ char *user;
+ int type; /* 1 = basic, 2 = digest */
+ char *plain_password; /* Basic only */
+ char *uri, *cnonce, *response, *qop, *nc, *nonce; /* Digest only */
+};
+
+
+/* Return 1 on success. Always initializes the ah structure. */
+static int
+parse_auth_header(struct mg_connection *conn,
+ char *buf,
+ size_t buf_size,
+ struct ah *ah)
+{
+ char *name, *value, *s;
+ const char *auth_header;
+ uint64_t nonce;
+
+ if (!ah || !conn) {
+ return 0;
+ }
+
+ (void)memset(ah, 0, sizeof(*ah));
+ auth_header = mg_get_header(conn, "Authorization");
+
+ if (auth_header == NULL) {
+ /* No Authorization header at all */
+ return 0;
+ }
+ if (0 == mg_strncasecmp(auth_header, "Basic ", 6)) {
+ /* Basic Auth (we never asked for this, but some client may send it) */
+ char *split;
+ const char *userpw_b64 = auth_header + 6;
+ size_t userpw_b64_len = strlen(userpw_b64);
+ size_t buf_len_r = buf_size;
+ if (mg_base64_decode(
+ userpw_b64, userpw_b64_len, (unsigned char *)buf, &buf_len_r)
+ != -1) {
+ return 0; /* decode error */
+ }
+ split = strchr(buf, ':');
+ if (!split) {
+ return 0; /* Format error */
+ }
+
+ /* Separate string at ':' */
+ *split = 0;
+
+ /* User name is before ':', Password is after ':' */
+ ah->user = buf;
+ ah->type = 1;
+ ah->plain_password = split + 1;
+
+ return 1;
+
+ } else if (0 == mg_strncasecmp(auth_header, "Digest ", 7)) {
+ /* Digest Auth ... implemented below */
+ ah->type = 2;
+
+ } else {
+ /* Unknown or invalid Auth method */
+ return 0;
+ }
+
+ /* Make modifiable copy of the auth header */
+ (void)mg_strlcpy(buf, auth_header + 7, buf_size);
+ s = buf;
+
+ /* Parse authorization header */
+ for (;;) {
+ /* Gobble initial spaces */
+ while (isspace((unsigned char)*s)) {
+ s++;
+ }
+ name = skip_quoted(&s, "=", " ", 0);
+ /* Value is either quote-delimited, or ends at first comma or space.
+ */
+ if (s[0] == '\"') {
+ s++;
+ value = skip_quoted(&s, "\"", " ", '\\');
+ if (s[0] == ',') {
+ s++;
+ }
+ } else {
+ value = skip_quoted(&s, ", ", " ", 0); /* IE uses commas, FF
+ * uses spaces */
+ }
+ if (*name == '\0') {
+ break;
+ }
+
+ if (!strcmp(name, "username")) {
+ ah->user = value;
+ } else if (!strcmp(name, "cnonce")) {
+ ah->cnonce = value;
+ } else if (!strcmp(name, "response")) {
+ ah->response = value;
+ } else if (!strcmp(name, "uri")) {
+ ah->uri = value;
+ } else if (!strcmp(name, "qop")) {
+ ah->qop = value;
+ } else if (!strcmp(name, "nc")) {
+ ah->nc = value;
+ } else if (!strcmp(name, "nonce")) {
+ ah->nonce = value;
+ }
+ }
+
+#if !defined(NO_NONCE_CHECK)
+ /* Read the nonce from the response. */
+ if (ah->nonce == NULL) {
+ return 0;
+ }
+ s = NULL;
+ nonce = strtoull(ah->nonce, &s, 10);
+ if ((s == NULL) || (*s != 0)) {
+ return 0;
+ }
+
+ /* Convert the nonce from the client to a number. */
+ nonce ^= conn->dom_ctx->auth_nonce_mask;
+
+ /* The converted number corresponds to the time the nounce has been
+ * created. This should not be earlier than the server start. */
+ /* Server side nonce check is valuable in all situations but one:
+ * if the server restarts frequently, but the client should not see
+ * that, so the server should accept nonces from previous starts. */
+ /* However, the reasonable default is to not accept a nonce from a
+ * previous start, so if anyone changed the access rights between
+ * two restarts, a new login is required. */
+ if (nonce < (uint64_t)conn->phys_ctx->start_time) {
+ /* nonce is from a previous start of the server and no longer valid
+ * (replay attack?) */
+ return 0;
+ }
+ /* Check if the nonce is too high, so it has not (yet) been used by the
+ * server. */
+ if (nonce >= ((uint64_t)conn->phys_ctx->start_time
+ + conn->dom_ctx->nonce_count)) {
+ return 0;
+ }
+#else
+ (void)nonce;
+#endif
+
+ return (ah->user != NULL);
+}
+
+
+static const char *
+mg_fgets(char *buf, size_t size, struct mg_file *filep)
+{
+ if (!filep) {
+ return NULL;
+ }
+
+ if (filep->access.fp != NULL) {
+ return fgets(buf, (int)size, filep->access.fp);
+ } else {
+ return NULL;
+ }
+}
+
+/* Define the initial recursion depth for procesesing htpasswd files that
+ * include other htpasswd
+ * (or even the same) files. It is not difficult to provide a file or files
+ * s.t. they force civetweb
+ * to infinitely recurse and then crash.
+ */
+#define INITIAL_DEPTH 9
+#if INITIAL_DEPTH <= 0
+#error Bad INITIAL_DEPTH for recursion, set to at least 1
+#endif
+
+#if !defined(NO_FILESYSTEMS)
+struct read_auth_file_struct {
+ struct mg_connection *conn;
+ struct ah ah;
+ const char *domain;
+ char buf[256 + 256 + 40];
+ const char *f_user;
+ const char *f_domain;
+ const char *f_ha1;
+};
+
+
+static int
+read_auth_file(struct mg_file *filep,
+ struct read_auth_file_struct *workdata,
+ int depth)
+{
+ int is_authorized = 0;
+ struct mg_file fp;
+ size_t l;
+
+ if (!filep || !workdata || (0 == depth)) {
+ return 0;
+ }
+
+ /* Loop over passwords file */
+ while (mg_fgets(workdata->buf, sizeof(workdata->buf), filep) != NULL) {
+ l = strlen(workdata->buf);
+ while (l > 0) {
+ if (isspace((unsigned char)workdata->buf[l - 1])
+ || iscntrl((unsigned char)workdata->buf[l - 1])) {
+ l--;
+ workdata->buf[l] = 0;
+ } else
+ break;
+ }
+ if (l < 1) {
+ continue;
+ }
+
+ workdata->f_user = workdata->buf;
+
+ if (workdata->f_user[0] == ':') {
+ /* user names may not contain a ':' and may not be empty,
+ * so lines starting with ':' may be used for a special purpose
+ */
+ if (workdata->f_user[1] == '#') {
+ /* :# is a comment */
+ continue;
+ } else if (!strncmp(workdata->f_user + 1, "include=", 8)) {
+ if (mg_fopen(workdata->conn,
+ workdata->f_user + 9,
+ MG_FOPEN_MODE_READ,
+ &fp)) {
+ is_authorized = read_auth_file(&fp, workdata, depth - 1);
+ (void)mg_fclose(
+ &fp.access); /* ignore error on read only file */
+
+ /* No need to continue processing files once we have a
+ * match, since nothing will reset it back
+ * to 0.
+ */
+ if (is_authorized) {
+ return is_authorized;
+ }
+ } else {
+ mg_cry_internal(workdata->conn,
+ "%s: cannot open authorization file: %s",
+ __func__,
+ workdata->buf);
+ }
+ continue;
+ }
+ /* everything is invalid for the moment (might change in the
+ * future) */
+ mg_cry_internal(workdata->conn,
+ "%s: syntax error in authorization file: %s",
+ __func__,
+ workdata->buf);
+ continue;
+ }
+
+ workdata->f_domain = strchr(workdata->f_user, ':');
+ if (workdata->f_domain == NULL) {
+ mg_cry_internal(workdata->conn,
+ "%s: syntax error in authorization file: %s",
+ __func__,
+ workdata->buf);
+ continue;
+ }
+ *(char *)(workdata->f_domain) = 0;
+ (workdata->f_domain)++;
+
+ workdata->f_ha1 = strchr(workdata->f_domain, ':');
+ if (workdata->f_ha1 == NULL) {
+ mg_cry_internal(workdata->conn,
+ "%s: syntax error in authorization file: %s",
+ __func__,
+ workdata->buf);
+ continue;
+ }
+ *(char *)(workdata->f_ha1) = 0;
+ (workdata->f_ha1)++;
+
+ if (!strcmp(workdata->ah.user, workdata->f_user)
+ && !strcmp(workdata->domain, workdata->f_domain)) {
+ switch (workdata->ah.type) {
+ case 1: /* Basic */
+ {
+ char md5[33];
+ mg_md5(md5,
+ workdata->f_user,
+ ":",
+ workdata->domain,
+ ":",
+ workdata->ah.plain_password,
+ NULL);
+ return 0 == memcmp(workdata->f_ha1, md5, 33);
+ }
+ case 2: /* Digest */
+ return check_password_digest(
+ workdata->conn->request_info.request_method,
+ workdata->f_ha1,
+ workdata->ah.uri,
+ workdata->ah.nonce,
+ workdata->ah.nc,
+ workdata->ah.cnonce,
+ workdata->ah.qop,
+ workdata->ah.response);
+ default: /* None/Other/Unknown */
+ return 0;
+ }
+ }
+ }
+
+ return is_authorized;
+}
+
+
+/* Authorize against the opened passwords file. Return 1 if authorized. */
+static int
+authorize(struct mg_connection *conn, struct mg_file *filep, const char *realm)
+{
+ struct read_auth_file_struct workdata;
+ char buf[MG_BUF_LEN];
+
+ if (!conn || !conn->dom_ctx) {
+ return 0;
+ }
+
+ memset(&workdata, 0, sizeof(workdata));
+ workdata.conn = conn;
+
+ if (!parse_auth_header(conn, buf, sizeof(buf), &workdata.ah)) {
+ return 0;
+ }
+
+ /* CGI needs it as REMOTE_USER */
+ conn->request_info.remote_user =
+ mg_strdup_ctx(workdata.ah.user, conn->phys_ctx);
+
+ if (realm) {
+ workdata.domain = realm;
+ } else {
+ workdata.domain = conn->dom_ctx->config[AUTHENTICATION_DOMAIN];
+ }
+
+ return read_auth_file(filep, &workdata, INITIAL_DEPTH);
+}
+
+
+/* Public function to check http digest authentication header */
+CIVETWEB_API int
+mg_check_digest_access_authentication(struct mg_connection *conn,
+ const char *realm,
+ const char *filename)
+{
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ int auth;
+
+ if (!conn || !filename) {
+ return -1;
+ }
+ if (!mg_fopen(conn, filename, MG_FOPEN_MODE_READ, &file)) {
+ return -2;
+ }
+
+ auth = authorize(conn, &file, realm);
+
+ mg_fclose(&file.access);
+
+ return auth;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+/* Return 1 if request is authorised, 0 otherwise. */
+static int
+check_authorization(struct mg_connection *conn, const char *path)
+{
+#if !defined(NO_FILESYSTEMS)
+ char fname[UTF8_PATH_MAX];
+ struct vec uri_vec, filename_vec;
+ const char *list;
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ int authorized = 1, truncated;
+
+ if (!conn || !conn->dom_ctx) {
+ return 0;
+ }
+
+ list = conn->dom_ctx->config[PROTECT_URI];
+ while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
+ if (!memcmp(conn->request_info.local_uri, uri_vec.ptr, uri_vec.len)) {
+ mg_snprintf(conn,
+ &truncated,
+ fname,
+ sizeof(fname),
+ "%.*s",
+ (int)filename_vec.len,
+ filename_vec.ptr);
+
+ if (truncated
+ || !mg_fopen(conn, fname, MG_FOPEN_MODE_READ, &file)) {
+ mg_cry_internal(conn,
+ "%s: cannot open %s: %s",
+ __func__,
+ fname,
+ strerror(errno));
+ }
+ break;
+ }
+ }
+
+ if (!is_file_opened(&file.access)) {
+ open_auth_file(conn, path, &file);
+ }
+
+ if (is_file_opened(&file.access)) {
+ authorized = authorize(conn, &file, NULL);
+ (void)mg_fclose(&file.access); /* ignore error on read only file */
+ }
+
+ return authorized;
+#else
+ (void)conn;
+ (void)path;
+ return 1;
+#endif /* NO_FILESYSTEMS */
+}
+
+
+/* Internal function. Assumes conn is valid */
+static void
+send_authorization_request(struct mg_connection *conn, const char *realm)
+{
+ uint64_t nonce = (uint64_t)(conn->phys_ctx->start_time);
+ int trunc = 0;
+ char buf[128];
+
+ if (!realm) {
+ realm = conn->dom_ctx->config[AUTHENTICATION_DOMAIN];
+ }
+
+ mg_lock_context(conn->phys_ctx);
+ nonce += conn->dom_ctx->nonce_count;
+ ++conn->dom_ctx->nonce_count;
+ mg_unlock_context(conn->phys_ctx);
+
+ nonce ^= conn->dom_ctx->auth_nonce_mask;
+ conn->must_close = 1;
+
+ /* Create 401 response */
+ mg_response_header_start(conn, 401);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+
+ /* Content for "WWW-Authenticate" header */
+ mg_snprintf(conn,
+ &trunc,
+ buf,
+ sizeof(buf),
+ "Digest qop=\"auth\", realm=\"%s\", "
+ "nonce=\"%" UINT64_FMT "\"",
+ realm,
+ nonce);
+
+ if (!trunc) {
+ /* !trunc should always be true */
+ mg_response_header_add(conn, "WWW-Authenticate", buf, -1);
+ }
+
+ /* Send all headers */
+ mg_response_header_send(conn);
+}
+
+
+/* Interface function. Parameters are provided by the user, so do
+ * at least some basic checks.
+ */
+CIVETWEB_API int
+mg_send_digest_access_authentication_request(struct mg_connection *conn,
+ const char *realm)
+{
+ if (conn && conn->dom_ctx) {
+ send_authorization_request(conn, realm);
+ return 0;
+ }
+ return -1;
+}
+
+
+#if !defined(NO_FILES)
+static int
+is_authorized_for_put(struct mg_connection *conn)
+{
+ int ret = 0;
+
+ if (conn) {
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ const char *passfile = conn->dom_ctx->config[PUT_DELETE_PASSWORDS_FILE];
+
+ if (passfile != NULL
+ && mg_fopen(conn, passfile, MG_FOPEN_MODE_READ, &file)) {
+ ret = authorize(conn, &file, NULL);
+ (void)mg_fclose(&file.access); /* ignore error on read only file */
+ }
+ }
+
+ DEBUG_TRACE("file write authorization: %i", ret);
+ return ret;
+}
+#endif
+
+
+CIVETWEB_API int
+mg_modify_passwords_file_ha1(const char *fname,
+ const char *domain,
+ const char *user,
+ const char *ha1)
+{
+ int found = 0, i, result = 1;
+ char line[512], u[256], d[256], h[256];
+ struct stat st = {0};
+ FILE *fp = NULL;
+ char *temp_file = NULL;
+ int temp_file_offs = 0;
+
+ /* Regard empty password as no password - remove user record. */
+ if ((ha1 != NULL) && (ha1[0] == '\0')) {
+ ha1 = NULL;
+ }
+
+ /* Other arguments must not be empty */
+ if ((fname == NULL) || (domain == NULL) || (user == NULL)) {
+ return 0;
+ }
+
+ /* Using the given file format, user name and domain must not contain
+ * the ':' character */
+ if (strchr(user, ':') != NULL) {
+ return 0;
+ }
+ if (strchr(domain, ':') != NULL) {
+ return 0;
+ }
+
+ /* Do not allow control characters like newline in user name and domain.
+ * Do not allow excessively long names either. */
+ for (i = 0; ((i < 255) && (user[i] != 0)); i++) {
+ if (iscntrl((unsigned char)user[i])) {
+ return 0;
+ }
+ }
+ if (user[i]) {
+ return 0; /* user name too long */
+ }
+ for (i = 0; ((i < 255) && (domain[i] != 0)); i++) {
+ if (iscntrl((unsigned char)domain[i])) {
+ return 0;
+ }
+ }
+ if (domain[i]) {
+ return 0; /* domain name too long */
+ }
+
+ /* The maximum length of the path to the password file is limited */
+ if (strlen(fname) >= UTF8_PATH_MAX) {
+ return 0;
+ }
+
+ /* Check if the file exists, and get file size */
+ if (0 == stat(fname, &st)) {
+ int temp_buf_len;
+ if (st.st_size > 10485760) {
+ /* Some funster provided a >10 MB text file */
+ return 0;
+ }
+
+ /* Add enough space for one more line */
+ temp_buf_len = (int)st.st_size + 1024;
+
+ /* Allocate memory (instead of using a temporary file) */
+ temp_file = (char *)mg_calloc((size_t)temp_buf_len, 1);
+ if (!temp_file) {
+ /* Out of memory */
+ return 0;
+ }
+
+ /* File exists. Read it into a memory buffer. */
+ fp = fopen(fname, "r");
+ if (fp == NULL) {
+ /* Cannot read file. No permission? */
+ mg_free(temp_file);
+ return 0;
+ }
+
+ /* Read content and store in memory */
+ while ((fgets(line, sizeof(line), fp) != NULL)
+ && ((temp_file_offs + 600) < temp_buf_len)) {
+ /* file format is "user:domain:hash\n" */
+ if (sscanf(line, "%255[^:]:%255[^:]:%255s", u, d, h) != 3) {
+ continue;
+ }
+ u[255] = 0;
+ d[255] = 0;
+ h[255] = 0;
+
+ if (!strcmp(u, user) && !strcmp(d, domain)) {
+ /* Found the user: change the password hash or drop the user
+ */
+ if ((ha1 != NULL) && (!found)) {
+ i = sprintf(temp_file + temp_file_offs,
+ "%s:%s:%s\n",
+ user,
+ domain,
+ ha1);
+ if (i < 1) {
+ fclose(fp);
+ mg_free(temp_file);
+ return 0;
+ }
+ temp_file_offs += i;
+ }
+ found = 1;
+ } else {
+ /* Copy existing user, including password hash */
+ i = sprintf(temp_file + temp_file_offs, "%s:%s:%s\n", u, d, h);
+ if (i < 1) {
+ fclose(fp);
+ mg_free(temp_file);
+ return 0;
+ }
+ temp_file_offs += i;
+ }
+ }
+ fclose(fp);
+ }
+
+ /* Create new file */
+ fp = fopen(fname, "w");
+ if (!fp) {
+ mg_free(temp_file);
+ return 0;
+ }
+
+#if !defined(_WIN32)
+ /* On Linux & co., restrict file read/write permissions to the owner */
+ if (fchmod(fileno(fp), S_IRUSR | S_IWUSR) != 0) {
+ result = 0;
+ }
+#endif
+
+ if ((temp_file != NULL) && (temp_file_offs > 0)) {
+ /* Store buffered content of old file */
+ if (fwrite(temp_file, 1, (size_t)temp_file_offs, fp)
+ != (size_t)temp_file_offs) {
+ result = 0;
+ }
+ }
+
+ /* If new user, just add it */
+ if ((ha1 != NULL) && (!found)) {
+ if (fprintf(fp, "%s:%s:%s\n", user, domain, ha1) < 6) {
+ result = 0;
+ }
+ }
+
+ /* All data written */
+ if (fclose(fp) != 0) {
+ result = 0;
+ }
+
+ mg_free(temp_file);
+ return result;
+}
+
+
+CIVETWEB_API int
+mg_modify_passwords_file(const char *fname,
+ const char *domain,
+ const char *user,
+ const char *pass)
+{
+ char ha1buf[33];
+ if ((fname == NULL) || (domain == NULL) || (user == NULL)) {
+ return 0;
+ }
+ if ((pass == NULL) || (pass[0] == 0)) {
+ return mg_modify_passwords_file_ha1(fname, domain, user, NULL);
+ }
+
+ mg_md5(ha1buf, user, ":", domain, ":", pass, NULL);
+ return mg_modify_passwords_file_ha1(fname, domain, user, ha1buf);
+}
+
+
+static int
+is_valid_port(unsigned long port)
+{
+ return (port <= 0xffff);
+}
+
+
+static int
+mg_inet_pton(int af, const char *src, void *dst, size_t dstlen, int resolve_src)
+{
+ struct addrinfo hints, *res, *ressave;
+ int func_ret = 0;
+ int gai_ret;
+
+ memset(&hints, 0, sizeof(struct addrinfo));
+ hints.ai_family = af;
+ if (!resolve_src) {
+ hints.ai_flags = AI_NUMERICHOST;
+ }
+
+ gai_ret = getaddrinfo(src, NULL, &hints, &res);
+ if (gai_ret != 0) {
+ /* gai_strerror could be used to convert gai_ret to a string */
+ /* POSIX return values: see
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/freeaddrinfo.html
+ */
+ /* Windows return values: see
+ * https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520%28v=vs.85%29.aspx
+ */
+ return 0;
+ }
+
+ ressave = res;
+
+ while (res) {
+ if ((dstlen >= (size_t)res->ai_addrlen)
+ && (res->ai_addr->sa_family == af)) {
+ memcpy(dst, res->ai_addr, res->ai_addrlen);
+ func_ret = 1;
+ }
+ res = res->ai_next;
+ }
+
+ freeaddrinfo(ressave);
+ return func_ret;
+}
+
+
+static int
+connect_socket(
+ struct mg_context *ctx /* may be NULL */,
+ const char *host,
+ int port, /* 1..65535, or -99 for domain sockets (may be changed) */
+ int use_ssl, /* 0 or 1 */
+ struct mg_error_data *error,
+ SOCKET *sock /* output: socket, must not be NULL */,
+ union usa *sa /* output: socket address, must not be NULL */
+)
+{
+ int ip_ver = 0;
+ int conn_ret = -1;
+ int sockerr = 0;
+ *sock = INVALID_SOCKET;
+ memset(sa, 0, sizeof(*sa));
+
+ if (host == NULL) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "NULL host");
+ }
+ return 0;
+ }
+
+#if defined(USE_X_DOM_SOCKET)
+ if (port == -99) {
+ /* Unix domain socket */
+ size_t hostlen = strlen(host);
+ if (hostlen >= sizeof(sa->sun.sun_path)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "host length exceeds limit");
+ }
+ return 0;
+ }
+ } else
+#endif
+ if ((port <= 0) || !is_valid_port((unsigned)port)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "invalid port");
+ }
+ return 0;
+ }
+
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS) && !defined(NO_SSL_DL)
+#if defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)
+ if (use_ssl && (TLS_client_method == NULL)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_LIBRARY_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "SSL is not initialized");
+ }
+ return 0;
+ }
+#else
+ if (use_ssl && (SSLv23_client_method == NULL)) {
+ if (error != 0) {
+ error->code = MG_ERROR_DATA_CODE_INIT_LIBRARY_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "SSL is not initialized");
+ }
+ return 0;
+ }
+#endif /* OPENSSL_API_1_1 || OPENSSL_API_3_0*/
+#else
+ (void)use_ssl;
+#endif /* NO SSL */
+
+#if defined(USE_X_DOM_SOCKET)
+ if (port == -99) {
+ size_t hostlen = strlen(host);
+ /* check (hostlen < sizeof(sun.sun_path)) already passed above */
+ ip_ver = -99;
+ sa->sun.sun_family = AF_UNIX;
+ memset(sa->sun.sun_path, 0, sizeof(sa->sun.sun_path));
+ memcpy(sa->sun.sun_path, host, hostlen);
+ } else
+#endif
+ if (mg_inet_pton(AF_INET, host, &sa->sin, sizeof(sa->sin), 1)) {
+ sa->sin.sin_port = htons((uint16_t)port);
+ ip_ver = 4;
+#if defined(USE_IPV6)
+ } else if (mg_inet_pton(AF_INET6, host, &sa->sin6, sizeof(sa->sin6), 1)) {
+ sa->sin6.sin6_port = htons((uint16_t)port);
+ ip_ver = 6;
+ } else if (host[0] == '[') {
+ /* While getaddrinfo on Windows will work with [::1],
+ * getaddrinfo on Linux only works with ::1 (without []). */
+ size_t l = strlen(host + 1);
+ char *h = (l > 1) ? mg_strdup_ctx(host + 1, ctx) : NULL;
+ if (h) {
+ h[l - 1] = 0;
+ if (mg_inet_pton(AF_INET6, h, &sa->sin6, sizeof(sa->sin6), 0)) {
+ sa->sin6.sin6_port = htons((uint16_t)port);
+ ip_ver = 6;
+ }
+ mg_free(h);
+ }
+#endif
+ }
+
+ if (ip_ver == 0) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_HOST_NOT_FOUND;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "host not found");
+ }
+ return 0;
+ }
+
+ if (ip_ver == 4) {
+ *sock = socket(PF_INET, SOCK_STREAM, 0);
+ }
+#if defined(USE_IPV6)
+ else if (ip_ver == 6) {
+ *sock = socket(PF_INET6, SOCK_STREAM, 0);
+ }
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ else if (ip_ver == -99) {
+ *sock = socket(AF_UNIX, SOCK_STREAM, 0);
+ }
+#endif
+
+ if (*sock == INVALID_SOCKET) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "socket(): %s",
+ strerror(ERRNO));
+ }
+ return 0;
+ }
+
+ if (0 != set_non_blocking_mode(*sock)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "Cannot set socket to non-blocking: %s",
+ strerror(ERRNO));
+ }
+ closesocket(*sock);
+ *sock = INVALID_SOCKET;
+ return 0;
+ }
+
+ set_close_on_exec(*sock, NULL, ctx);
+
+ if (ip_ver == 4) {
+ /* connected with IPv4 */
+ conn_ret = connect(*sock,
+ (struct sockaddr *)((void *)&sa->sin),
+ sizeof(sa->sin));
+ }
+#if defined(USE_IPV6)
+ else if (ip_ver == 6) {
+ /* connected with IPv6 */
+ conn_ret = connect(*sock,
+ (struct sockaddr *)((void *)&sa->sin6),
+ sizeof(sa->sin6));
+ }
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ else if (ip_ver == -99) {
+ /* connected to domain socket */
+ conn_ret = connect(*sock,
+ (struct sockaddr *)((void *)&sa->sun),
+ sizeof(sa->sun));
+ }
+#endif
+
+ if (conn_ret != 0) {
+ sockerr = ERRNO;
+ }
+
+#if defined(_WIN32)
+ if ((conn_ret != 0) && (sockerr == WSAEWOULDBLOCK)) {
+#else
+ if ((conn_ret != 0) && (sockerr == EINPROGRESS)) {
+#endif
+ /* Data for getsockopt */
+ void *psockerr = &sockerr;
+ int ret;
+
+#if defined(_WIN32)
+ int len = (int)sizeof(sockerr);
+#else
+ socklen_t len = (socklen_t)sizeof(sockerr);
+#endif
+
+ /* Data for poll */
+ struct mg_pollfd pfd[1];
+ int pollres;
+ int ms_wait = 10000; /* 10 second timeout */
+ stop_flag_t nonstop;
+ STOP_FLAG_ASSIGN(&nonstop, 0);
+
+ /* For a non-blocking socket, the connect sequence is:
+ * 1) call connect (will not block)
+ * 2) wait until the socket is ready for writing (select or poll)
+ * 3) check connection state with getsockopt
+ */
+ pfd[0].fd = *sock;
+ pfd[0].events = POLLOUT;
+ pollres = mg_poll(pfd, 1, ms_wait, ctx ? &(ctx->stop_flag) : &nonstop);
+
+ if (pollres != 1) {
+ /* Not connected */
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_CONNECT_TIMEOUT;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "connect(%s:%d): timeout",
+ host,
+ port);
+ }
+ closesocket(*sock);
+ *sock = INVALID_SOCKET;
+ return 0;
+ }
+
+#if defined(_WIN32)
+ ret = getsockopt(*sock, SOL_SOCKET, SO_ERROR, (char *)psockerr, &len);
+#else
+ ret = getsockopt(*sock, SOL_SOCKET, SO_ERROR, psockerr, &len);
+#endif
+
+ if ((ret == 0) && (sockerr == 0)) {
+ conn_ret = 0;
+ }
+ }
+
+ if (conn_ret != 0) {
+ /* Not connected */
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_CONNECT_FAILED;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "connect(%s:%d): error %s",
+ host,
+ port,
+ strerror(sockerr));
+ }
+ closesocket(*sock);
+ *sock = INVALID_SOCKET;
+ return 0;
+ }
+
+ return 1;
+}
+
+
+CIVETWEB_API int
+mg_url_encode(const char *src, char *dst, size_t dst_len)
+{
+ static const char *dont_escape = "._-$,;~()";
+ static const char *hex = "0123456789abcdef";
+ char *pos = dst;
+ const char *end = dst + dst_len - 1;
+
+ for (; ((*src != '\0') && (pos < end)); src++, pos++) {
+ if (isalnum((unsigned char)*src)
+ || (strchr(dont_escape, *src) != NULL)) {
+ *pos = *src;
+ } else if (pos + 2 < end) {
+ pos[0] = '%';
+ pos[1] = hex[(unsigned char)*src >> 4];
+ pos[2] = hex[(unsigned char)*src & 0xf];
+ pos += 2;
+ } else {
+ break;
+ }
+ }
+
+ *pos = '\0';
+ return (*src == '\0') ? (int)(pos - dst) : -1;
+}
+
+/* Return 0 on success, non-zero if an error occurs. */
+
+static int
+print_dir_entry(struct mg_connection *conn, struct de *de)
+{
+ size_t namesize, escsize, i;
+ char *href, *esc, *p;
+ char size[64], mod[64];
+#if defined(REENTRANT_TIME)
+ struct tm _tm;
+ struct tm *tm = &_tm;
+#else
+ struct tm *tm;
+#endif
+
+ /* Estimate worst case size for encoding and escaping */
+ namesize = strlen(de->file_name) + 1;
+ escsize = de->file_name[strcspn(de->file_name, "&<>")] ? namesize * 5 : 0;
+ href = (char *)mg_malloc(namesize * 3 + escsize);
+ if (href == NULL) {
+ return -1;
+ }
+ mg_url_encode(de->file_name, href, namesize * 3);
+ esc = NULL;
+ if (escsize > 0) {
+ /* HTML escaping needed */
+ esc = href + namesize * 3;
+ for (i = 0, p = esc; de->file_name[i]; i++, p += strlen(p)) {
+ mg_strlcpy(p, de->file_name + i, 2);
+ if (*p == '&') {
+ strcpy(p, "&");
+ } else if (*p == '<') {
+ strcpy(p, "<");
+ } else if (*p == '>') {
+ strcpy(p, ">");
+ }
+ }
+ }
+
+ if (de->file.is_directory) {
+ mg_snprintf(conn,
+ NULL, /* Buffer is big enough */
+ size,
+ sizeof(size),
+ "%s",
+ "[DIRECTORY]");
+ } else {
+ /* We use (signed) cast below because MSVC 6 compiler cannot
+ * convert unsigned __int64 to double. Sigh. */
+ if (de->file.size < 1024) {
+ mg_snprintf(conn,
+ NULL, /* Buffer is big enough */
+ size,
+ sizeof(size),
+ "%d",
+ (int)de->file.size);
+ } else if (de->file.size < 0x100000) {
+ mg_snprintf(conn,
+ NULL, /* Buffer is big enough */
+ size,
+ sizeof(size),
+ "%.1fk",
+ (double)de->file.size / 1024.0);
+ } else if (de->file.size < 0x40000000) {
+ mg_snprintf(conn,
+ NULL, /* Buffer is big enough */
+ size,
+ sizeof(size),
+ "%.1fM",
+ (double)de->file.size / 1048576);
+ } else {
+ mg_snprintf(conn,
+ NULL, /* Buffer is big enough */
+ size,
+ sizeof(size),
+ "%.1fG",
+ (double)de->file.size / 1073741824);
+ }
+ }
+
+ /* Note: mg_snprintf will not cause a buffer overflow above.
+ * So, string truncation checks are not required here. */
+
+#if defined(REENTRANT_TIME)
+ localtime_r(&de->file.last_modified, tm);
+#else
+ tm = localtime(&de->file.last_modified);
+#endif
+ if (tm != NULL) {
+ strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", tm);
+ } else {
+ mg_strlcpy(mod, "01-Jan-1970 00:00", sizeof(mod));
+ }
+ mg_printf(conn,
+ "<tr><td><a href=\"%s%s\">%s%s</a></td>"
+ "<td> %s</td><td> %s</td></tr>\n",
+ href,
+ de->file.is_directory ? "/" : "",
+ esc ? esc : de->file_name,
+ de->file.is_directory ? "/" : "",
+ mod,
+ size);
+ mg_free(href);
+ return 0;
+}
+
+
+/* This function is called from send_directory() and used for
+ * sorting directory entries by size, name, or modification time. */
+static int
+compare_dir_entries(const void *p1, const void *p2, void *arg)
+{
+ const char *query_string = (const char *)(arg != NULL ? arg : "");
+ if (p1 && p2) {
+ const struct de *a = (const struct de *)p1, *b = (const struct de *)p2;
+ int cmp_result = 0;
+
+ if ((query_string == NULL) || (query_string[0] == '\0')) {
+ query_string = "n";
+ }
+
+ /* Sort Directories vs Files */
+ if (a->file.is_directory && !b->file.is_directory) {
+ return -1; /* Always put directories on top */
+ } else if (!a->file.is_directory && b->file.is_directory) {
+ return 1; /* Always put directories on top */
+ }
+
+ /* Sort by size or date */
+ if (*query_string == 's') {
+ cmp_result = (a->file.size == b->file.size)
+ ? 0
+ : ((a->file.size > b->file.size) ? 1 : -1);
+ } else if (*query_string == 'd') {
+ cmp_result =
+ (a->file.last_modified == b->file.last_modified)
+ ? 0
+ : ((a->file.last_modified > b->file.last_modified) ? 1
+ : -1);
+ }
+
+ /* Sort by name:
+ * if (*query_string == 'n') ...
+ * but also sort files of same size/date by name as secondary criterion.
+ */
+ if (cmp_result == 0) {
+ cmp_result = strcmp(a->file_name, b->file_name);
+ }
+
+ /* For descending order, invert result */
+ return (query_string[1] == 'd') ? -cmp_result : cmp_result;
+ }
+ return 0;
+}
+
+
+static int
+must_hide_file(struct mg_connection *conn, const char *path)
+{
+ if (conn && conn->dom_ctx) {
+ const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
+ const char *pattern = conn->dom_ctx->config[HIDE_FILES];
+ return (match_prefix_strlen(pw_pattern, path) > 0)
+ || (match_prefix_strlen(pattern, path) > 0);
+ }
+ return 0;
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+static int
+scan_directory(struct mg_connection *conn,
+ const char *dir,
+ void *data,
+ int (*cb)(struct de *, void *))
+{
+ char path[UTF8_PATH_MAX];
+ struct dirent *dp;
+ DIR *dirp;
+ struct de de;
+ int truncated;
+
+ if ((dirp = mg_opendir(conn, dir)) == NULL) {
+ return 0;
+ } else {
+
+ while ((dp = mg_readdir(dirp)) != NULL) {
+ /* Do not show current dir and hidden files */
+ if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")
+ || must_hide_file(conn, dp->d_name)) {
+ continue;
+ }
+
+ mg_snprintf(
+ conn, &truncated, path, sizeof(path), "%s/%s", dir, dp->d_name);
+
+ /* If we don't memset stat structure to zero, mtime will have
+ * garbage and strftime() will segfault later on in
+ * print_dir_entry(). memset is required only if mg_stat()
+ * fails. For more details, see
+ * http://code.google.com/p/mongoose/issues/detail?id=79 */
+ memset(&de.file, 0, sizeof(de.file));
+
+ if (truncated) {
+ /* If the path is not complete, skip processing. */
+ continue;
+ }
+
+ if (!mg_stat(conn, path, &de.file)) {
+ mg_cry_internal(conn,
+ "%s: mg_stat(%s) failed: %s",
+ __func__,
+ path,
+ strerror(ERRNO));
+ }
+ de.file_name = dp->d_name;
+ if (cb(&de, data)) {
+ /* stopped */
+ break;
+ }
+ }
+ (void)mg_closedir(dirp);
+ }
+ return 1;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+#if !defined(NO_FILES)
+static int
+remove_directory(struct mg_connection *conn, const char *dir)
+{
+ char path[UTF8_PATH_MAX];
+ struct dirent *dp;
+ DIR *dirp;
+ struct de de;
+ int truncated;
+ int ok = 1;
+
+ if ((dirp = mg_opendir(conn, dir)) == NULL) {
+ return 0;
+ } else {
+
+ while ((dp = mg_readdir(dirp)) != NULL) {
+ /* Do not show current dir (but show hidden files as they will
+ * also be removed) */
+ if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) {
+ continue;
+ }
+
+ mg_snprintf(
+ conn, &truncated, path, sizeof(path), "%s/%s", dir, dp->d_name);
+
+ /* If we don't memset stat structure to zero, mtime will have
+ * garbage and strftime() will segfault later on in
+ * print_dir_entry(). memset is required only if mg_stat()
+ * fails. For more details, see
+ * http://code.google.com/p/mongoose/issues/detail?id=79 */
+ memset(&de.file, 0, sizeof(de.file));
+
+ if (truncated) {
+ /* Do not delete anything shorter */
+ ok = 0;
+ continue;
+ }
+
+ if (!mg_stat(conn, path, &de.file)) {
+ mg_cry_internal(conn,
+ "%s: mg_stat(%s) failed: %s",
+ __func__,
+ path,
+ strerror(ERRNO));
+ ok = 0;
+ }
+
+ if (de.file.is_directory) {
+ if (remove_directory(conn, path) == 0) {
+ ok = 0;
+ }
+ } else {
+ /* This will fail file is the file is in memory */
+ if (mg_remove(conn, path) == 0) {
+ ok = 0;
+ }
+ }
+ }
+ (void)mg_closedir(dirp);
+
+ IGNORE_UNUSED_RESULT(rmdir(dir));
+ }
+
+ return ok;
+}
+#endif
+
+
+struct dir_scan_data {
+ struct de *entries;
+ size_t num_entries;
+ size_t arr_size;
+};
+
+
+#if !defined(NO_FILESYSTEMS)
+static int
+dir_scan_callback(struct de *de, void *data)
+{
+ struct dir_scan_data *dsd = (struct dir_scan_data *)data;
+ struct de *entries = dsd->entries;
+
+ if ((entries == NULL) || (dsd->num_entries >= dsd->arr_size)) {
+ /* Here "entries" is a temporary pointer and can be replaced,
+ * "dsd->entries" is the original pointer */
+ entries =
+ (struct de *)mg_realloc(entries,
+ dsd->arr_size * 2 * sizeof(entries[0]));
+ if (entries == NULL) {
+ /* stop scan */
+ return 1;
+ }
+ dsd->entries = entries;
+ dsd->arr_size *= 2;
+ }
+ entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
+ if (entries[dsd->num_entries].file_name == NULL) {
+ /* stop scan */
+ return 1;
+ }
+ entries[dsd->num_entries].file = de->file;
+ dsd->num_entries++;
+
+ return 0;
+}
+
+
+static void
+handle_directory_request(struct mg_connection *conn, const char *dir)
+{
+ size_t i;
+ int sort_direction;
+ struct dir_scan_data data = {NULL, 0, 128};
+ char date[64], *esc, *p;
+ const char *title;
+ time_t curtime = time(NULL);
+
+ if (!conn) {
+ return;
+ }
+
+ if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: Cannot open directory\nopendir(%s): %s",
+ dir,
+ strerror(ERRNO));
+ return;
+ }
+
+ gmt_time_string(date, sizeof(date), &curtime);
+
+ esc = NULL;
+ title = conn->request_info.local_uri;
+ if (title[strcspn(title, "&<>")]) {
+ /* HTML escaping needed */
+ esc = (char *)mg_malloc(strlen(title) * 5 + 1);
+ if (esc) {
+ for (i = 0, p = esc; title[i]; i++, p += strlen(p)) {
+ mg_strlcpy(p, title + i, 2);
+ if (*p == '&') {
+ strcpy(p, "&");
+ } else if (*p == '<') {
+ strcpy(p, "<");
+ } else if (*p == '>') {
+ strcpy(p, ">");
+ }
+ }
+ } else {
+ title = "";
+ }
+ }
+
+ sort_direction = ((conn->request_info.query_string != NULL)
+ && (conn->request_info.query_string[0] != '\0')
+ && (conn->request_info.query_string[1] == 'd'))
+ ? 'a'
+ : 'd';
+
+ conn->must_close = 1;
+
+ /* Create 200 OK response */
+ mg_response_header_start(conn, 200);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn,
+ "Content-Type",
+ "text/html; charset=utf-8",
+ -1);
+
+ /* Send all headers */
+ mg_response_header_send(conn);
+
+ /* Body */
+ mg_printf(conn,
+ "<!DOCTYPE html>"
+ "<html><head><title>Index of %s</title>"
+ "<style>th {text-align: left;}</style></head>"
+ "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
+ "<tr><th><a href=\"?n%c\">Name</a></th>"
+ "<th><a href=\"?d%c\">Modified</a></th>"
+ "<th><a href=\"?s%c\">Size</a></th></tr>"
+ "<tr><td colspan=\"3\"><hr></td></tr>",
+ esc ? esc : title,
+ esc ? esc : title,
+ sort_direction,
+ sort_direction,
+ sort_direction);
+ mg_free(esc);
+
+ /* Print first entry - link to a parent directory */
+ mg_printf(conn,
+ "<tr><td><a href=\"%s\">%s</a></td>"
+ "<td> %s</td><td> %s</td></tr>\n",
+ "..",
+ "Parent directory",
+ "-",
+ "-");
+
+ /* Sort and print directory entries */
+ if (data.entries != NULL) {
+ mg_sort(data.entries,
+ data.num_entries,
+ sizeof(data.entries[0]),
+ compare_dir_entries,
+ (void *)conn->request_info.query_string);
+ for (i = 0; i < data.num_entries; i++) {
+ print_dir_entry(conn, &data.entries[i]);
+ mg_free(data.entries[i].file_name);
+ }
+ mg_free(data.entries);
+ }
+
+ mg_printf(conn, "%s", "</table></pre></body></html>");
+ conn->status_code = 200;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+/* Send len bytes from the opened file to the client. */
+static void
+send_file_data(struct mg_connection *conn,
+ struct mg_file *filep,
+ int64_t offset,
+ int64_t len,
+ int no_buffering)
+{
+ char buf[MG_BUF_LEN];
+ int to_read, num_read, num_written;
+ int64_t size;
+
+ if (!filep || !conn) {
+ return;
+ }
+
+ /* Sanity check the offset */
+ size = (filep->stat.size > INT64_MAX) ? INT64_MAX
+ : (int64_t)(filep->stat.size);
+ offset = (offset < 0) ? 0 : ((offset > size) ? size : offset);
+
+ if (len > 0 && filep->access.fp != NULL) {
+ /* file stored on disk */
+#if defined(__linux__)
+ /* sendfile is only available for Linux */
+ if ((conn->ssl == 0) && (conn->throttle == 0)
+ && (!mg_strcasecmp(conn->dom_ctx->config[ALLOW_SENDFILE_CALL],
+ "yes"))) {
+ off_t sf_offs = (off_t)offset;
+ ssize_t sf_sent;
+ int sf_file = fileno(filep->access.fp);
+ int loop_cnt = 0;
+
+ do {
+ /* 2147479552 (0x7FFFF000) is a limit found by experiment on
+ * 64 bit Linux (2^31 minus one memory page of 4k?). */
+ size_t sf_tosend =
+ (size_t)((len < 0x7FFFF000) ? len : 0x7FFFF000);
+ sf_sent =
+ sendfile(conn->client.sock, sf_file, &sf_offs, sf_tosend);
+ if (sf_sent > 0) {
+ len -= sf_sent;
+ offset += sf_sent;
+ } else if (loop_cnt == 0) {
+ /* This file can not be sent using sendfile.
+ * This might be the case for pseudo-files in the
+ * /sys/ and /proc/ file system.
+ * Use the regular user mode copy code instead. */
+ break;
+ } else if (sf_sent == 0) {
+ /* No error, but 0 bytes sent. May be EOF? */
+ return;
+ }
+ loop_cnt++;
+
+ } while ((len > 0) && (sf_sent >= 0));
+
+ if (sf_sent > 0) {
+ return; /* OK */
+ }
+
+ /* sf_sent<0 means error, thus fall back to the classic way */
+ /* This is always the case, if sf_file is not a "normal" file,
+ * e.g., for sending data from the output of a CGI process. */
+ offset = (int64_t)sf_offs;
+ }
+#endif
+ if ((offset > 0) && (fseeko(filep->access.fp, offset, SEEK_SET) != 0)) {
+ mg_cry_internal(conn,
+ "%s: fseeko() failed: %s",
+ __func__,
+ strerror(ERRNO));
+ mg_send_http_error(
+ conn,
+ 500,
+ "%s",
+ "Error: Unable to access file at requested position.");
+ } else {
+ while (len > 0) {
+ /* Calculate how much to read from the file into the buffer. */
+ /* If no_buffering is set, we should not wait until the
+ * CGI->Server buffer is filled, but send everything
+ * immediately. In theory buffering could be turned off using
+ * setbuf(filep->access.fp, NULL);
+ * setvbuf(filep->access.fp, NULL, _IONBF, 0);
+ * but in practice this does not work. A "Linux only" solution
+ * may be to use select(). The only portable way is to read byte
+ * by byte, but this is quite inefficient from a performance
+ * point of view. */
+ to_read = no_buffering ? 1 : sizeof(buf);
+ if ((int64_t)to_read > len) {
+ to_read = (int)len;
+ }
+
+ /* Read from file, exit the loop on error */
+ if ((num_read =
+ (int)fread(buf, 1, (size_t)to_read, filep->access.fp))
+ <= 0) {
+ break;
+ }
+
+ /* Send read bytes to the client, exit the loop on error */
+ if ((num_written = mg_write(conn, buf, (size_t)num_read))
+ != num_read) {
+ break;
+ }
+
+ /* Both read and were successful, adjust counters */
+ len -= num_written;
+ }
+ }
+ }
+}
+
+
+static int
+parse_range_header(const char *header, int64_t *a, int64_t *b)
+{
+ return sscanf(header,
+ "bytes=%" INT64_FMT "-%" INT64_FMT,
+ a,
+ b); // NOLINT(cert-err34-c) 'sscanf' used to convert a string
+ // to an integer value, but function will not report
+ // conversion errors; consider using 'strtol' instead
+}
+
+
+static void
+construct_etag(char *buf, size_t buf_len, const struct mg_file_stat *filestat)
+{
+ if ((filestat != NULL) && (buf != NULL)) {
+ mg_snprintf(NULL,
+ NULL, /* All calls to construct_etag use 64 byte buffer */
+ buf,
+ buf_len,
+ "\"%lx.%" INT64_FMT "\"",
+ (unsigned long)filestat->last_modified,
+ filestat->size);
+ }
+}
+
+
+static void
+fclose_on_exec(struct mg_file_access *filep, struct mg_connection *conn)
+{
+ if (filep != NULL && filep->fp != NULL) {
+#if defined(_WIN32)
+ (void)conn; /* Unused. */
+#else
+ if (fcntl(fileno(filep->fp), F_SETFD, FD_CLOEXEC) != 0) {
+ mg_cry_internal(conn,
+ "%s: fcntl(F_SETFD FD_CLOEXEC) failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+#endif
+ }
+}
+
+
+#if defined(USE_ZLIB)
+#include "mod_zlib.inl"
+#endif
+
+
+#if !defined(NO_FILESYSTEMS)
+static void
+handle_static_file_request(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *filep,
+ const char *mime_type,
+ const char *additional_headers)
+{
+ char lm[64], etag[64];
+ char range[128]; /* large enough, so there will be no overflow */
+ const char *range_hdr;
+ int64_t cl, r1, r2;
+ struct vec mime_vec;
+ int n, truncated;
+ char gz_path[UTF8_PATH_MAX];
+ const char *encoding = 0;
+ int is_head_request;
+
+#if defined(USE_ZLIB)
+ /* Compression is allowed, unless there is a reason not to use
+ * compression. If the file is already compressed, too small or a
+ * "range" request was made, on the fly compression is not possible. */
+ int allow_on_the_fly_compression = 1;
+#endif
+
+ if ((conn == NULL) || (conn->dom_ctx == NULL) || (filep == NULL)) {
+ return;
+ }
+
+ is_head_request = !strcmp(conn->request_info.request_method, "HEAD");
+
+ if (mime_type == NULL) {
+ get_mime_type(conn, path, &mime_vec);
+ } else {
+ mime_vec.ptr = mime_type;
+ mime_vec.len = strlen(mime_type);
+ }
+ if (filep->stat.size > INT64_MAX) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: File size is too large to send\n%" INT64_FMT,
+ filep->stat.size);
+ return;
+ }
+ cl = (int64_t)filep->stat.size;
+ conn->status_code = 200;
+ range[0] = '\0';
+
+#if defined(USE_ZLIB)
+ /* if this file is in fact a pre-gzipped file, rewrite its filename
+ * it's important to rewrite the filename after resolving
+ * the mime type from it, to preserve the actual file's type */
+ if (!conn->accept_gzip) {
+ allow_on_the_fly_compression = 0;
+ }
+#endif
+
+ /* Check if there is a range header */
+ range_hdr = mg_get_header(conn, "Range");
+
+ /* For gzipped files, add *.gz */
+ if (filep->stat.is_gzipped) {
+ mg_snprintf(conn, &truncated, gz_path, sizeof(gz_path), "%s.gz", path);
+
+ if (truncated) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: Path of zipped file too long (%s)",
+ path);
+ return;
+ }
+
+ path = gz_path;
+ encoding = "gzip";
+
+#if defined(USE_ZLIB)
+ /* File is already compressed. No "on the fly" compression. */
+ allow_on_the_fly_compression = 0;
+#endif
+ } else if ((conn->accept_gzip) && (range_hdr == NULL)
+ && (filep->stat.size >= MG_FILE_COMPRESSION_SIZE_LIMIT)) {
+ struct mg_file_stat file_stat;
+
+ mg_snprintf(conn, &truncated, gz_path, sizeof(gz_path), "%s.gz", path);
+
+ if (!truncated && mg_stat(conn, gz_path, &file_stat)
+ && !file_stat.is_directory) {
+ file_stat.is_gzipped = 1;
+ filep->stat = file_stat;
+ cl = (int64_t)filep->stat.size;
+ path = gz_path;
+ encoding = "gzip";
+
+#if defined(USE_ZLIB)
+ /* File is already compressed. No "on the fly" compression. */
+ allow_on_the_fly_compression = 0;
+#endif
+ }
+ }
+
+ if (!mg_fopen(conn, path, MG_FOPEN_MODE_READ, filep)) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: Cannot open file\nfopen(%s): %s",
+ path,
+ strerror(ERRNO));
+ return;
+ }
+
+ fclose_on_exec(&filep->access, conn);
+
+ /* If "Range" request was made: parse header, send only selected part
+ * of the file. */
+ r1 = r2 = 0;
+ if ((range_hdr != NULL)
+ && ((n = parse_range_header(range_hdr, &r1, &r2)) > 0) && (r1 >= 0)
+ && (r2 >= 0)) {
+ /* actually, range requests don't play well with a pre-gzipped
+ * file (since the range is specified in the uncompressed space) */
+ if (filep->stat.is_gzipped) {
+ mg_send_http_error(
+ conn,
+ 416, /* 416 = Range Not Satisfiable */
+ "%s",
+ "Error: Range requests in gzipped files are not supported");
+ (void)mg_fclose(
+ &filep->access); /* ignore error on read only file */
+ return;
+ }
+ conn->status_code = 206;
+ cl = (n == 2) ? (((r2 > cl) ? cl : r2) - r1 + 1) : (cl - r1);
+ mg_snprintf(conn,
+ NULL, /* range buffer is big enough */
+ range,
+ sizeof(range),
+ "bytes "
+ "%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT,
+ r1,
+ r1 + cl - 1,
+ filep->stat.size);
+
+#if defined(USE_ZLIB)
+ /* Do not compress ranges. */
+ allow_on_the_fly_compression = 0;
+#endif
+ }
+
+ /* Do not compress small files. Small files do not benefit from file
+ * compression, but there is still some overhead. */
+#if defined(USE_ZLIB)
+ if (filep->stat.size < MG_FILE_COMPRESSION_SIZE_LIMIT) {
+ /* File is below the size limit. */
+ allow_on_the_fly_compression = 0;
+ }
+#endif
+
+ /* Prepare Etag, and Last-Modified headers. */
+ gmt_time_string(lm, sizeof(lm), &filep->stat.last_modified);
+ construct_etag(etag, sizeof(etag), &filep->stat);
+
+ /* Create 2xx (200, 206) response */
+ mg_response_header_start(conn, conn->status_code);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ send_cors_header(conn);
+ mg_response_header_add(conn,
+ "Content-Type",
+ mime_vec.ptr,
+ (int)mime_vec.len);
+ mg_response_header_add(conn, "Last-Modified", lm, -1);
+ mg_response_header_add(conn, "Etag", etag, -1);
+
+#if defined(USE_ZLIB)
+ /* On the fly compression allowed */
+ if (allow_on_the_fly_compression) {
+ /* For on the fly compression, we don't know the content size in
+ * advance, so we have to use chunked encoding */
+ encoding = "gzip";
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP1) {
+ /* HTTP/2 is always using "chunks" (frames) */
+ mg_response_header_add(conn, "Transfer-Encoding", "chunked", -1);
+ }
+
+ } else
+#endif
+ {
+ /* Without on-the-fly compression, we know the content-length
+ * and we can use ranges (with on-the-fly compression we cannot).
+ * So we send these response headers only in this case. */
+ char len[32];
+ int trunc = 0;
+ mg_snprintf(conn, &trunc, len, sizeof(len), "%" INT64_FMT, cl);
+
+ if (!trunc) {
+ mg_response_header_add(conn, "Content-Length", len, -1);
+ }
+
+ mg_response_header_add(conn, "Accept-Ranges", "bytes", -1);
+ }
+
+ if (encoding) {
+ mg_response_header_add(conn, "Content-Encoding", encoding, -1);
+ }
+ if (range[0] != 0) {
+ mg_response_header_add(conn, "Content-Range", range, -1);
+ }
+
+ /* The code above does not add any header starting with X- to make
+ * sure no one of the additional_headers is included twice */
+ if ((additional_headers != NULL) && (*additional_headers != 0)) {
+ mg_response_header_add_lines(conn, additional_headers);
+ }
+
+ /* Send all headers */
+ mg_response_header_send(conn);
+
+ if (!is_head_request) {
+#if defined(USE_ZLIB)
+ if (allow_on_the_fly_compression) {
+ /* Compress and send */
+ send_compressed_data(conn, filep);
+ } else
+#endif
+ {
+ /* Send file directly */
+ send_file_data(conn, filep, r1, cl, 0); /* send static file */
+ }
+ }
+ (void)mg_fclose(&filep->access); /* ignore error on read only file */
+}
+
+
+CIVETWEB_API int
+mg_send_file_body(struct mg_connection *conn, const char *path)
+{
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ if (!mg_fopen(conn, path, MG_FOPEN_MODE_READ, &file)) {
+ return -1;
+ }
+ fclose_on_exec(&file.access, conn);
+ send_file_data(conn, &file, 0, INT64_MAX, 0); /* send static file */
+ (void)mg_fclose(&file.access); /* Ignore errors for readonly files */
+ return 0; /* >= 0 for OK */
+}
+#endif /* NO_FILESYSTEMS */
+
+
+#if !defined(NO_CACHING)
+/* Return True if we should reply 304 Not Modified. */
+static int
+is_not_modified(const struct mg_connection *conn,
+ const struct mg_file_stat *filestat)
+{
+ char etag[64];
+ const char *ims = mg_get_header(conn, "If-Modified-Since");
+ const char *inm = mg_get_header(conn, "If-None-Match");
+ construct_etag(etag, sizeof(etag), filestat);
+
+ return ((inm != NULL) && !mg_strcasecmp(etag, inm))
+ || ((ims != NULL)
+ && (filestat->last_modified <= parse_date_string(ims)));
+}
+
+
+static void
+handle_not_modified_static_file_request(struct mg_connection *conn,
+ struct mg_file *filep)
+{
+ char lm[64], etag[64];
+
+ if ((conn == NULL) || (filep == NULL)) {
+ return;
+ }
+
+ gmt_time_string(lm, sizeof(lm), &filep->stat.last_modified);
+ construct_etag(etag, sizeof(etag), &filep->stat);
+
+ /* Create 304 "not modified" response */
+ mg_response_header_start(conn, 304);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Last-Modified", lm, -1);
+ mg_response_header_add(conn, "Etag", etag, -1);
+
+ /* Send all headers */
+ mg_response_header_send(conn);
+}
+#endif
+
+
+#if !defined(NO_FILESYSTEMS)
+CIVETWEB_API void
+mg_send_file(struct mg_connection *conn, const char *path)
+{
+ mg_send_mime_file2(conn, path, NULL, NULL);
+}
+
+
+CIVETWEB_API void
+mg_send_mime_file(struct mg_connection *conn,
+ const char *path,
+ const char *mime_type)
+{
+ mg_send_mime_file2(conn, path, mime_type, NULL);
+}
+
+
+CIVETWEB_API void
+mg_send_mime_file2(struct mg_connection *conn,
+ const char *path,
+ const char *mime_type,
+ const char *additional_headers)
+{
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+
+ if (!conn) {
+ /* No conn */
+ return;
+ }
+
+ if (mg_stat(conn, path, &file.stat)) {
+#if !defined(NO_CACHING)
+ if (is_not_modified(conn, &file.stat)) {
+ /* Send 304 "Not Modified" - this must not send any body data */
+ handle_not_modified_static_file_request(conn, &file);
+ } else
+#endif /* NO_CACHING */
+ if (file.stat.is_directory) {
+ if (!mg_strcasecmp(conn->dom_ctx->config[ENABLE_DIRECTORY_LISTING],
+ "yes")) {
+ handle_directory_request(conn, path);
+ } else {
+ mg_send_http_error(conn,
+ 403,
+ "%s",
+ "Error: Directory listing denied");
+ }
+ } else {
+ handle_static_file_request(
+ conn, path, &file, mime_type, additional_headers);
+ }
+ } else {
+ mg_send_http_error(conn, 404, "%s", "Error: File not found");
+ }
+}
+
+
+/* For a given PUT path, create all intermediate subdirectories.
+ * Return 0 if the path itself is a directory.
+ * Return 1 if the path leads to a file.
+ * Return -1 for if the path is too long.
+ * Return -2 if path can not be created.
+ */
+static int
+put_dir(struct mg_connection *conn, const char *path)
+{
+ char buf[UTF8_PATH_MAX];
+ const char *s, *p;
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ size_t len;
+ int res = 1;
+
+ for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
+ len = (size_t)(p - path);
+ if (len >= sizeof(buf)) {
+ /* path too long */
+ res = -1;
+ break;
+ }
+ memcpy(buf, path, len);
+ buf[len] = '\0';
+
+ /* Try to create intermediate directory */
+ DEBUG_TRACE("mkdir(%s)", buf);
+ if (!mg_stat(conn, buf, &file.stat) && mg_mkdir(conn, buf, 0755) != 0) {
+ /* path does not exist and can not be created */
+ res = -2;
+ break;
+ }
+
+ /* Is path itself a directory? */
+ if (p[1] == '\0') {
+ res = 0;
+ }
+ }
+
+ return res;
+}
+
+
+static void
+remove_bad_file(const struct mg_connection *conn, const char *path)
+{
+ int r = mg_remove(conn, path);
+ if (r != 0) {
+ mg_cry_internal(conn,
+ "%s: Cannot remove invalid file %s",
+ __func__,
+ path);
+ }
+}
+
+
+CIVETWEB_API long long
+mg_store_body(struct mg_connection *conn, const char *path)
+{
+ char buf[MG_BUF_LEN];
+ long long len = 0;
+ int ret, n;
+ struct mg_file fi;
+
+ if (conn->consumed_content != 0) {
+ mg_cry_internal(conn, "%s: Contents already consumed", __func__);
+ return -11;
+ }
+
+ ret = put_dir(conn, path);
+ if (ret < 0) {
+ /* -1 for path too long,
+ * -2 for path can not be created. */
+ return ret;
+ }
+ if (ret != 1) {
+ /* Return 0 means, path itself is a directory. */
+ return 0;
+ }
+
+ if (mg_fopen(conn, path, MG_FOPEN_MODE_WRITE, &fi) == 0) {
+ return -12;
+ }
+
+ ret = mg_read(conn, buf, sizeof(buf));
+ while (ret > 0) {
+ n = (int)fwrite(buf, 1, (size_t)ret, fi.access.fp);
+ if (n != ret) {
+ (void)mg_fclose(
+ &fi.access); /* File is bad and will be removed anyway. */
+ remove_bad_file(conn, path);
+ return -13;
+ }
+ len += ret;
+ ret = mg_read(conn, buf, sizeof(buf));
+ }
+
+ /* File is open for writing. If fclose fails, there was probably an
+ * error flushing the buffer to disk, so the file on disk might be
+ * broken. Delete it and return an error to the caller. */
+ if (mg_fclose(&fi.access) != 0) {
+ remove_bad_file(conn, path);
+ return -14;
+ }
+
+ return len;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+/* Parse a buffer:
+ * Forward the string pointer till the end of a word, then
+ * terminate it and forward till the begin of the next word.
+ */
+static int
+skip_to_end_of_word_and_terminate(char **ppw, int eol)
+{
+ /* Forward until a space is found - use isgraph here */
+ /* See http://www.cplusplus.com/reference/cctype/ */
+ while (isgraph((unsigned char)**ppw)) {
+ (*ppw)++;
+ }
+
+ /* Check end of word */
+ if (eol) {
+ /* must be a end of line */
+ if ((**ppw != '\r') && (**ppw != '\n')) {
+ return -1;
+ }
+ } else {
+ /* must be a end of a word, but not a line */
+ if (**ppw != ' ') {
+ return -1;
+ }
+ }
+
+ /* Terminate and forward to the next word */
+ do {
+ **ppw = 0;
+ (*ppw)++;
+ } while (isspace((unsigned char)**ppw));
+
+ /* Check after term */
+ if (!eol) {
+ /* if it's not the end of line, there must be a next word */
+ if (!isgraph((unsigned char)**ppw)) {
+ return -1;
+ }
+ }
+
+ /* ok */
+ return 1;
+}
+
+
+/* Parse HTTP headers from the given buffer, advance buf pointer
+ * to the point where parsing stopped.
+ * All parameters must be valid pointers (not NULL).
+ * Return <0 on error. */
+static int
+parse_http_headers(char **buf, struct mg_header hdr[MG_MAX_HEADERS])
+{
+ int i;
+ int num_headers = 0;
+
+ for (i = 0; i < (int)MG_MAX_HEADERS; i++) {
+ char *dp = *buf;
+
+ /* Skip all ASCII characters (>SPACE, <127), to find a ':' */
+ while ((*dp != ':') && (*dp >= 33) && (*dp <= 126)) {
+ dp++;
+ }
+ if (dp == *buf) {
+ /* End of headers reached. */
+ break;
+ }
+
+ /* Drop all spaces after header name before : */
+ while (*dp == ' ') {
+ *dp = 0;
+ dp++;
+ }
+ if (*dp != ':') {
+ /* This is not a valid field. */
+ return -1;
+ }
+
+ /* End of header key (*dp == ':') */
+ /* Truncate here and set the key name */
+ *dp = 0;
+ hdr[i].name = *buf;
+
+ /* Skip all spaces */
+ do {
+ dp++;
+ } while ((*dp == ' ') || (*dp == '\t'));
+
+ /* The rest of the line is the value */
+ hdr[i].value = dp;
+
+ /* Find end of line */
+ while ((*dp != 0) && (*dp != '\r') && (*dp != '\n')) {
+ dp++;
+ };
+
+ /* eliminate \r */
+ if (*dp == '\r') {
+ *dp = 0;
+ dp++;
+ if (*dp != '\n') {
+ /* This is not a valid line. */
+ return -1;
+ }
+ }
+
+ /* here *dp is either 0 or '\n' */
+ /* in any case, we have a new header */
+ num_headers = i + 1;
+
+ if (*dp) {
+ *dp = 0;
+ dp++;
+ *buf = dp;
+
+ if ((dp[0] == '\r') || (dp[0] == '\n')) {
+ /* This is the end of the header */
+ break;
+ }
+ } else {
+ *buf = dp;
+ break;
+ }
+ }
+ return num_headers;
+}
+
+
+struct mg_http_method_info {
+ const char *name;
+ int request_has_body;
+ int response_has_body;
+ int is_safe;
+ int is_idempotent;
+ int is_cacheable;
+};
+
+
+/* https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods */
+static const struct mg_http_method_info http_methods[] = {
+ /* HTTP (RFC 2616) */
+ {"GET", 0, 1, 1, 1, 1},
+ {"POST", 1, 1, 0, 0, 0},
+ {"PUT", 1, 0, 0, 1, 0},
+ {"DELETE", 0, 0, 0, 1, 0},
+ {"HEAD", 0, 0, 1, 1, 1},
+ {"OPTIONS", 0, 0, 1, 1, 0},
+ {"CONNECT", 1, 1, 0, 0, 0},
+ /* TRACE method (RFC 2616) is not supported for security reasons */
+
+ /* PATCH method (RFC 5789) */
+ {"PATCH", 1, 0, 0, 0, 0},
+ /* PATCH method only allowed for CGI/Lua/LSP and callbacks. */
+
+ /* WEBDAV (RFC 2518) */
+ {"PROPFIND", 0, 1, 1, 1, 0},
+ /* http://www.webdav.org/specs/rfc4918.html, 9.1:
+ * Some PROPFIND results MAY be cached, with care,
+ * as there is no cache validation mechanism for
+ * most properties. This method is both safe and
+ * idempotent (see Section 9.1 of [RFC2616]). */
+ {"MKCOL", 0, 0, 0, 1, 0},
+ /* http://www.webdav.org/specs/rfc4918.html, 9.1:
+ * When MKCOL is invoked without a request body,
+ * the newly created collection SHOULD have no
+ * members. A MKCOL request message may contain
+ * a message body. The precise behavior of a MKCOL
+ * request when the body is present is undefined,
+ * ... ==> We do not support MKCOL with body data.
+ * This method is idempotent, but not safe (see
+ * Section 9.1 of [RFC2616]). Responses to this
+ * method MUST NOT be cached. */
+
+ /* Methods for write access to files on WEBDAV (RFC 2518) */
+ {"LOCK", 1, 1, 0, 0, 0},
+ {"UNLOCK", 1, 0, 0, 0, 0},
+ {"PROPPATCH", 1, 1, 0, 0, 0},
+ {"COPY", 1, 0, 0, 0, 0},
+ {"MOVE", 1, 1, 0, 0, 0},
+
+ /* Unsupported WEBDAV Methods: */
+ /* + 11 methods from RFC 3253 */
+ /* ORDERPATCH (RFC 3648) */
+ /* ACL (RFC 3744) */
+ /* SEARCH (RFC 5323) */
+ /* + MicroSoft extensions
+ * https://msdn.microsoft.com/en-us/library/aa142917.aspx */
+
+ /* REPORT method (RFC 3253) */
+ {"REPORT", 1, 1, 1, 1, 1},
+ /* REPORT method only allowed for CGI/Lua/LSP and callbacks. */
+ /* It was defined for WEBDAV in RFC 3253, Sec. 3.6
+ * (https://tools.ietf.org/html/rfc3253#section-3.6), but seems
+ * to be useful for REST in case a "GET request with body" is
+ * required. */
+
+ {NULL, 0, 0, 0, 0, 0}
+ /* end of list */
+};
+
+
+/* All method names */
+static char *all_methods = NULL; /* Built by mg_init_library */
+
+
+static const struct mg_http_method_info *
+get_http_method_info(const char *method)
+{
+ /* Check if the method is known to the server. The list of all known
+ * HTTP methods can be found here at
+ * http://www.iana.org/assignments/http-methods/http-methods.xhtml
+ */
+ const struct mg_http_method_info *m = http_methods;
+
+ while (m->name) {
+ if (!strcmp(m->name, method)) {
+ return m;
+ }
+ m++;
+ }
+ return NULL;
+}
+
+
+static int
+is_valid_http_method(const char *method)
+{
+ return (get_http_method_info(method) != NULL);
+}
+
+
+/* Parse HTTP request, fill in mg_request_info structure.
+ * This function modifies the buffer by NUL-terminating
+ * HTTP request components, header names and header values.
+ * Parameters:
+ * buf (in/out): pointer to the HTTP header to parse and split
+ * len (in): length of HTTP header buffer
+ * re (out): parsed header as mg_request_info
+ * buf and ri must be valid pointers (not NULL), len>0.
+ * Returns <0 on error. */
+static int
+parse_http_request(char *buf, int len, struct mg_request_info *ri)
+{
+ int request_length;
+ int init_skip = 0;
+
+ /* Reset attributes. DO NOT TOUCH is_ssl, remote_addr,
+ * remote_port */
+ ri->remote_user = ri->request_method = ri->request_uri = ri->http_version =
+ NULL;
+ ri->num_headers = 0;
+
+ /* RFC says that all initial whitespaces should be ignored */
+ /* This included all leading \r and \n (isspace) */
+ /* See table: http://www.cplusplus.com/reference/cctype/ */
+ while ((len > 0) && isspace((unsigned char)*buf)) {
+ buf++;
+ len--;
+ init_skip++;
+ }
+
+ if (len == 0) {
+ /* Incomplete request */
+ return 0;
+ }
+
+ /* Control characters are not allowed, including zero */
+ if (iscntrl((unsigned char)*buf)) {
+ return -1;
+ }
+
+ /* Find end of HTTP header */
+ request_length = get_http_header_len(buf, len);
+ if (request_length <= 0) {
+ return request_length;
+ }
+ buf[request_length - 1] = '\0';
+
+ if ((*buf == 0) || (*buf == '\r') || (*buf == '\n')) {
+ return -1;
+ }
+
+ /* The first word has to be the HTTP method */
+ ri->request_method = buf;
+
+ if (skip_to_end_of_word_and_terminate(&buf, 0) <= 0) {
+ return -1;
+ }
+
+ /* The second word is the URI */
+ ri->request_uri = buf;
+
+ if (skip_to_end_of_word_and_terminate(&buf, 0) <= 0) {
+ return -1;
+ }
+
+ /* Next would be the HTTP version */
+ ri->http_version = buf;
+
+ if (skip_to_end_of_word_and_terminate(&buf, 1) <= 0) {
+ return -1;
+ }
+
+ /* Check for a valid HTTP version key */
+ if (strncmp(ri->http_version, "HTTP/", 5) != 0) {
+ /* Invalid request */
+ return -1;
+ }
+ ri->http_version += 5;
+
+ /* Check for a valid http method */
+ if (!is_valid_http_method(ri->request_method)) {
+ return -1;
+ }
+
+ /* Parse all HTTP headers */
+ ri->num_headers = parse_http_headers(&buf, ri->http_headers);
+ if (ri->num_headers < 0) {
+ /* Error while parsing headers */
+ return -1;
+ }
+
+ return request_length + init_skip;
+}
+
+
+static int
+parse_http_response(char *buf, int len, struct mg_response_info *ri)
+{
+ int response_length;
+ int init_skip = 0;
+ char *tmp, *tmp2;
+ long l;
+
+ /* Initialize elements. */
+ ri->http_version = ri->status_text = NULL;
+ ri->num_headers = ri->status_code = 0;
+
+ /* RFC says that all initial whitespaces should be ignored */
+ /* This included all leading \r and \n (isspace) */
+ /* See table: http://www.cplusplus.com/reference/cctype/ */
+ while ((len > 0) && isspace((unsigned char)*buf)) {
+ buf++;
+ len--;
+ init_skip++;
+ }
+
+ if (len == 0) {
+ /* Incomplete request */
+ return 0;
+ }
+
+ /* Control characters are not allowed, including zero */
+ if (iscntrl((unsigned char)*buf)) {
+ return -1;
+ }
+
+ /* Find end of HTTP header */
+ response_length = get_http_header_len(buf, len);
+ if (response_length <= 0) {
+ return response_length;
+ }
+ buf[response_length - 1] = '\0';
+
+ if ((*buf == 0) || (*buf == '\r') || (*buf == '\n')) {
+ return -1;
+ }
+
+ /* The first word is the HTTP version */
+ /* Check for a valid HTTP version key */
+ if (strncmp(buf, "HTTP/", 5) != 0) {
+ /* Invalid request */
+ return -1;
+ }
+ buf += 5;
+ if (!isgraph((unsigned char)buf[0])) {
+ /* Invalid request */
+ return -1;
+ }
+ ri->http_version = buf;
+
+ if (skip_to_end_of_word_and_terminate(&buf, 0) <= 0) {
+ return -1;
+ }
+
+ /* The second word is the status as a number */
+ tmp = buf;
+
+ if (skip_to_end_of_word_and_terminate(&buf, 0) <= 0) {
+ return -1;
+ }
+
+ l = strtol(tmp, &tmp2, 10);
+ if ((l < 100) || (l >= 1000) || ((tmp2 - tmp) != 3) || (*tmp2 != 0)) {
+ /* Everything else but a 3 digit code is invalid */
+ return -1;
+ }
+ ri->status_code = (int)l;
+
+ /* The rest of the line is the status text */
+ ri->status_text = buf;
+
+ /* Find end of status text */
+ /* isgraph or isspace = isprint */
+ while (isprint((unsigned char)*buf)) {
+ buf++;
+ }
+ if ((*buf != '\r') && (*buf != '\n')) {
+ return -1;
+ }
+ /* Terminate string and forward buf to next line */
+ do {
+ *buf = 0;
+ buf++;
+ } while (isspace((unsigned char)*buf));
+
+ /* Parse all HTTP headers */
+ ri->num_headers = parse_http_headers(&buf, ri->http_headers);
+ if (ri->num_headers < 0) {
+ /* Error while parsing headers */
+ return -1;
+ }
+
+ return response_length + init_skip;
+}
+
+
+/* Keep reading the input (either opened file descriptor fd, or socket sock,
+ * or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
+ * buffer (which marks the end of HTTP request). Buffer buf may already
+ * have some data. The length of the data is stored in nread.
+ * Upon every read operation, increase nread by the number of bytes read. */
+static int
+read_message(FILE *fp,
+ struct mg_connection *conn,
+ char *buf,
+ int bufsiz,
+ int *nread)
+{
+ int request_len, n = 0;
+ struct timespec last_action_time;
+ double request_timeout;
+
+ if (!conn) {
+ return 0;
+ }
+
+ memset(&last_action_time, 0, sizeof(last_action_time));
+
+ if (conn->dom_ctx->config[REQUEST_TIMEOUT]) {
+ /* value of request_timeout is in seconds, config in milliseconds */
+ request_timeout =
+ strtod(conn->dom_ctx->config[REQUEST_TIMEOUT], NULL) / 1000.0;
+ } else {
+ request_timeout =
+ strtod(config_options[REQUEST_TIMEOUT].default_value, NULL)
+ / 1000.0;
+ }
+ if (conn->handled_requests > 0) {
+ if (conn->dom_ctx->config[KEEP_ALIVE_TIMEOUT]) {
+ request_timeout =
+ strtod(conn->dom_ctx->config[KEEP_ALIVE_TIMEOUT], NULL)
+ / 1000.0;
+ }
+ }
+
+ request_len = get_http_header_len(buf, *nread);
+
+ while (request_len == 0) {
+ /* Full request not yet received */
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ /* Server is to be stopped. */
+ return -1;
+ }
+
+ if (*nread >= bufsiz) {
+ /* Request too long */
+ return -2;
+ }
+
+ n = pull_inner(
+ fp, conn, buf + *nread, bufsiz - *nread, request_timeout);
+ if (n == -2) {
+ /* Receive error */
+ return -1;
+ }
+
+ /* update clock after every read request */
+ clock_gettime(CLOCK_MONOTONIC, &last_action_time);
+
+ if (n > 0) {
+ *nread += n;
+ request_len = get_http_header_len(buf, *nread);
+ }
+
+ if ((request_len == 0) && (request_timeout >= 0)) {
+ if (mg_difftimespec(&last_action_time, &(conn->req_time))
+ > request_timeout) {
+ /* Timeout */
+ return -1;
+ }
+ }
+ }
+
+ return request_len;
+}
+
+
+#if !defined(NO_CGI) || !defined(NO_FILES)
+static int
+forward_body_data(struct mg_connection *conn, FILE *fp, SOCKET sock, SSL *ssl)
+{
+ const char *expect;
+ char buf[MG_BUF_LEN];
+ int success = 0;
+
+ if (!conn) {
+ return 0;
+ }
+
+ expect = mg_get_header(conn, "Expect");
+ DEBUG_ASSERT(fp != NULL);
+ if (!fp) {
+ mg_send_http_error(conn, 500, "%s", "Error: NULL File");
+ return 0;
+ }
+
+ if ((expect != NULL) && (mg_strcasecmp(expect, "100-continue") != 0)) {
+ /* Client sent an "Expect: xyz" header and xyz is not 100-continue.
+ */
+ mg_send_http_error(conn, 417, "Error: Can not fulfill expectation");
+ } else {
+ if (expect != NULL) {
+ (void)mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
+ conn->status_code = 100;
+ } else {
+ conn->status_code = 200;
+ }
+
+ DEBUG_ASSERT(conn->consumed_content == 0);
+
+ if (conn->consumed_content != 0) {
+ mg_send_http_error(conn, 500, "%s", "Error: Size mismatch");
+ return 0;
+ }
+
+ for (;;) {
+ int nread = mg_read(conn, buf, sizeof(buf));
+ if (nread <= 0) {
+ success = (nread == 0);
+ break;
+ }
+ if (push_all(conn->phys_ctx, fp, sock, ssl, buf, nread) != nread) {
+ break;
+ }
+ }
+
+ /* Each error code path in this function must send an error */
+ if (!success) {
+ /* NOTE: Maybe some data has already been sent. */
+ /* TODO (low): If some data has been sent, a correct error
+ * reply can no longer be sent, so just close the connection */
+ mg_send_http_error(conn, 500, "%s", "");
+ }
+ }
+
+ return success;
+}
+#endif
+
+
+#if defined(USE_TIMERS)
+
+#define TIMER_API static
+#include "timer.inl"
+
+#endif /* USE_TIMERS */
+
+
+#if !defined(NO_CGI)
+/* This structure helps to create an environment for the spawned CGI
+ * program.
+ * Environment is an array of "VARIABLE=VALUE\0" ASCII strings,
+ * last element must be NULL.
+ * However, on Windows there is a requirement that all these
+ * VARIABLE=VALUE\0
+ * strings must reside in a contiguous buffer. The end of the buffer is
+ * marked by two '\0' characters.
+ * We satisfy both worlds: we create an envp array (which is vars), all
+ * entries are actually pointers inside buf. */
+struct cgi_environment {
+ struct mg_connection *conn;
+ /* Data block */
+ char *buf; /* Environment buffer */
+ size_t buflen; /* Space available in buf */
+ size_t bufused; /* Space taken in buf */
+ /* Index block */
+ char **var; /* char **envp */
+ size_t varlen; /* Number of variables available in var */
+ size_t varused; /* Number of variables stored in var */
+};
+
+
+static void addenv(struct cgi_environment *env,
+ PRINTF_FORMAT_STRING(const char *fmt),
+ ...) PRINTF_ARGS(2, 3);
+
+/* Append VARIABLE=VALUE\0 string to the buffer, and add a respective
+ * pointer into the vars array. Assumes env != NULL and fmt != NULL. */
+static void
+addenv(struct cgi_environment *env, const char *fmt, ...)
+{
+ size_t i, n, space;
+ int truncated = 0;
+ char *added;
+ va_list ap;
+
+ if ((env->varlen - env->varused) < 2) {
+ mg_cry_internal(env->conn,
+ "%s: Cannot register CGI variable [%s]",
+ __func__,
+ fmt);
+ return;
+ }
+
+ /* Calculate how much space is left in the buffer */
+ space = (env->buflen - env->bufused);
+
+ do {
+ /* Space for "\0\0" is always needed. */
+ if (space <= 2) {
+ /* Allocate new buffer */
+ n = env->buflen + CGI_ENVIRONMENT_SIZE;
+ added = (char *)mg_realloc_ctx(env->buf, n, env->conn->phys_ctx);
+ if (!added) {
+ /* Out of memory */
+ mg_cry_internal(
+ env->conn,
+ "%s: Cannot allocate memory for CGI variable [%s]",
+ __func__,
+ fmt);
+ return;
+ }
+ /* Retarget pointers */
+ env->buf = added;
+ env->buflen = n;
+ for (i = 0, n = 0; i < env->varused; i++) {
+ env->var[i] = added + n;
+ n += strlen(added + n) + 1;
+ }
+ space = (env->buflen - env->bufused);
+ }
+
+ /* Make a pointer to the free space int the buffer */
+ added = env->buf + env->bufused;
+
+ /* Copy VARIABLE=VALUE\0 string into the free space */
+ va_start(ap, fmt);
+ mg_vsnprintf(env->conn, &truncated, added, space - 1, fmt, ap);
+ va_end(ap);
+
+ /* Do not add truncated strings to the environment */
+ if (truncated) {
+ /* Reallocate the buffer */
+ space = 0;
+ }
+ } while (truncated);
+
+ /* Calculate number of bytes added to the environment */
+ n = strlen(added) + 1;
+ env->bufused += n;
+
+ /* Append a pointer to the added string into the envp array */
+ env->var[env->varused] = added;
+ env->varused++;
+}
+
+/* Return 0 on success, non-zero if an error occurs. */
+
+static int
+prepare_cgi_environment(struct mg_connection *conn,
+ const char *prog,
+ struct cgi_environment *env,
+ int cgi_config_idx)
+{
+ const char *s;
+ struct vec var_vec;
+ char *p, src_addr[IP_ADDR_STR_LEN], http_var_name[128];
+ int i, truncated, uri_len;
+
+ if ((conn == NULL) || (prog == NULL) || (env == NULL)) {
+ return -1;
+ }
+
+ env->conn = conn;
+ env->buflen = CGI_ENVIRONMENT_SIZE;
+ env->bufused = 0;
+ env->buf = (char *)mg_malloc_ctx(env->buflen, conn->phys_ctx);
+ if (env->buf == NULL) {
+ mg_cry_internal(conn,
+ "%s: Not enough memory for environmental buffer",
+ __func__);
+ return -1;
+ }
+ env->varlen = MAX_CGI_ENVIR_VARS;
+ env->varused = 0;
+ env->var =
+ (char **)mg_malloc_ctx(env->varlen * sizeof(char *), conn->phys_ctx);
+ if (env->var == NULL) {
+ mg_cry_internal(conn,
+ "%s: Not enough memory for environmental variables",
+ __func__);
+ mg_free(env->buf);
+ return -1;
+ }
+
+ addenv(env, "SERVER_NAME=%s", conn->dom_ctx->config[AUTHENTICATION_DOMAIN]);
+ addenv(env, "SERVER_ROOT=%s", conn->dom_ctx->config[DOCUMENT_ROOT]);
+ addenv(env, "DOCUMENT_ROOT=%s", conn->dom_ctx->config[DOCUMENT_ROOT]);
+ addenv(env, "SERVER_SOFTWARE=CivetWeb/%s", mg_version());
+
+ /* Prepare the environment block */
+ addenv(env, "%s", "GATEWAY_INTERFACE=CGI/1.1");
+ addenv(env, "%s", "SERVER_PROTOCOL=HTTP/1.1");
+ addenv(env, "%s", "REDIRECT_STATUS=200"); /* For PHP */
+
+ addenv(env, "SERVER_PORT=%d", conn->request_info.server_port);
+
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+ addenv(env, "REMOTE_ADDR=%s", src_addr);
+
+ addenv(env, "REQUEST_METHOD=%s", conn->request_info.request_method);
+ addenv(env, "REMOTE_PORT=%d", conn->request_info.remote_port);
+
+ addenv(env, "REQUEST_URI=%s", conn->request_info.request_uri);
+ addenv(env, "LOCAL_URI=%s", conn->request_info.local_uri);
+ addenv(env, "LOCAL_URI_RAW=%s", conn->request_info.local_uri_raw);
+
+ /* SCRIPT_NAME */
+ uri_len = (int)strlen(conn->request_info.local_uri);
+ if (conn->path_info == NULL) {
+ if (conn->request_info.local_uri[uri_len - 1] != '/') {
+ /* URI: /path_to_script/script.cgi */
+ addenv(env, "SCRIPT_NAME=%s", conn->request_info.local_uri);
+ } else {
+ /* URI: /path_to_script/ ... using index.cgi */
+ const char *index_file = strrchr(prog, '/');
+ if (index_file) {
+ addenv(env,
+ "SCRIPT_NAME=%s%s",
+ conn->request_info.local_uri,
+ index_file + 1);
+ }
+ }
+ } else {
+ /* URI: /path_to_script/script.cgi/path_info */
+ addenv(env,
+ "SCRIPT_NAME=%.*s",
+ uri_len - (int)strlen(conn->path_info),
+ conn->request_info.local_uri);
+ }
+
+ addenv(env, "SCRIPT_FILENAME=%s", prog);
+ if (conn->path_info == NULL) {
+ addenv(env, "PATH_TRANSLATED=%s", conn->dom_ctx->config[DOCUMENT_ROOT]);
+ } else {
+ addenv(env,
+ "PATH_TRANSLATED=%s%s",
+ conn->dom_ctx->config[DOCUMENT_ROOT],
+ conn->path_info);
+ }
+
+ addenv(env, "HTTPS=%s", (conn->ssl == NULL) ? "off" : "on");
+
+ if ((s = mg_get_header(conn, "Content-Type")) != NULL) {
+ addenv(env, "CONTENT_TYPE=%s", s);
+ }
+ if (conn->request_info.query_string != NULL) {
+ addenv(env, "QUERY_STRING=%s", conn->request_info.query_string);
+ }
+ if ((s = mg_get_header(conn, "Content-Length")) != NULL) {
+ addenv(env, "CONTENT_LENGTH=%s", s);
+ }
+ if ((s = getenv("PATH")) != NULL) {
+ addenv(env, "PATH=%s", s);
+ }
+ if (conn->path_info != NULL) {
+ addenv(env, "PATH_INFO=%s", conn->path_info);
+ }
+
+ if (conn->status_code > 0) {
+ /* CGI error handler should show the status code */
+ addenv(env, "STATUS=%d", conn->status_code);
+ }
+
+#if defined(_WIN32)
+ if ((s = getenv("COMSPEC")) != NULL) {
+ addenv(env, "COMSPEC=%s", s);
+ }
+ if ((s = getenv("SYSTEMROOT")) != NULL) {
+ addenv(env, "SYSTEMROOT=%s", s);
+ }
+ if ((s = getenv("SystemDrive")) != NULL) {
+ addenv(env, "SystemDrive=%s", s);
+ }
+ if ((s = getenv("ProgramFiles")) != NULL) {
+ addenv(env, "ProgramFiles=%s", s);
+ }
+ if ((s = getenv("ProgramFiles(x86)")) != NULL) {
+ addenv(env, "ProgramFiles(x86)=%s", s);
+ }
+#else
+ if ((s = getenv("LD_LIBRARY_PATH")) != NULL) {
+ addenv(env, "LD_LIBRARY_PATH=%s", s);
+ }
+#endif /* _WIN32 */
+
+ if ((s = getenv("PERLLIB")) != NULL) {
+ addenv(env, "PERLLIB=%s", s);
+ }
+
+ if (conn->request_info.remote_user != NULL) {
+ addenv(env, "REMOTE_USER=%s", conn->request_info.remote_user);
+ addenv(env, "%s", "AUTH_TYPE=Digest");
+ }
+
+ /* Add all headers as HTTP_* variables */
+ for (i = 0; i < conn->request_info.num_headers; i++) {
+
+ (void)mg_snprintf(conn,
+ &truncated,
+ http_var_name,
+ sizeof(http_var_name),
+ "HTTP_%s",
+ conn->request_info.http_headers[i].name);
+
+ if (truncated) {
+ mg_cry_internal(conn,
+ "%s: HTTP header variable too long [%s]",
+ __func__,
+ conn->request_info.http_headers[i].name);
+ continue;
+ }
+
+ /* Convert variable name into uppercase, and change - to _ */
+ for (p = http_var_name; *p != '\0'; p++) {
+ if (*p == '-') {
+ *p = '_';
+ }
+ *p = (char)toupper((unsigned char)*p);
+ }
+
+ addenv(env,
+ "%s=%s",
+ http_var_name,
+ conn->request_info.http_headers[i].value);
+ }
+
+ /* Add user-specified variables */
+ s = conn->dom_ctx->config[CGI_ENVIRONMENT + cgi_config_idx];
+ while ((s = next_option(s, &var_vec, NULL)) != NULL) {
+ addenv(env, "%.*s", (int)var_vec.len, var_vec.ptr);
+ }
+
+ env->var[env->varused] = NULL;
+ env->buf[env->bufused] = '\0';
+
+ return 0;
+}
+
+
+/* Data for CGI process control: PID and number of references */
+struct process_control_data {
+ pid_t pid;
+ ptrdiff_t references;
+};
+
+static int
+abort_cgi_process(void *data)
+{
+ /* Waitpid checks for child status and won't work for a pid that does
+ * not identify a child of the current process. Thus, if the pid is
+ * reused, we will not affect a different process. */
+ struct process_control_data *proc = (struct process_control_data *)data;
+ int status = 0;
+ ptrdiff_t refs;
+ pid_t ret_pid;
+
+ ret_pid = waitpid(proc->pid, &status, WNOHANG);
+ if ((ret_pid != (pid_t)-1) && (status == 0)) {
+ /* Stop child process */
+ DEBUG_TRACE("CGI timer: Stop child process %d\n", proc->pid);
+ kill(proc->pid, SIGABRT);
+
+ /* Wait until process is terminated (don't leave zombies) */
+ while (waitpid(proc->pid, &status, 0) != (pid_t)-1) /* nop */
+ ;
+ } else {
+ DEBUG_TRACE("CGI timer: Child process %d already stopped\n", proc->pid);
+ }
+ /* Dec reference counter */
+ refs = mg_atomic_dec(&proc->references);
+ if (refs == 0) {
+ /* no more references - free data */
+ mg_free(data);
+ }
+
+ return 0;
+}
+
+
+/* Local (static) function assumes all arguments are valid. */
+static void
+handle_cgi_request(struct mg_connection *conn,
+ const char *prog,
+ int cgi_config_idx)
+{
+ char *buf;
+ size_t buflen;
+ int headers_len, data_len, i, truncated;
+ int fdin[2] = {-1, -1}, fdout[2] = {-1, -1}, fderr[2] = {-1, -1};
+ const char *status, *status_text;
+ char *pbuf, dir[UTF8_PATH_MAX], *p;
+ struct mg_request_info ri;
+ struct cgi_environment blk;
+ FILE *in = NULL, *out = NULL, *err = NULL;
+ struct mg_file fout = STRUCT_FILE_INITIALIZER;
+ pid_t pid = (pid_t)-1;
+ struct process_control_data *proc = NULL;
+ char *cfg_buffering = conn->dom_ctx->config[CGI_BUFFERING + cgi_config_idx];
+ int no_buffering = 0;
+
+#if defined(USE_TIMERS)
+ double cgi_timeout;
+ if (conn->dom_ctx->config[CGI_TIMEOUT + cgi_config_idx]) {
+ /* Get timeout in seconds */
+ cgi_timeout =
+ atof(conn->dom_ctx->config[CGI_TIMEOUT + cgi_config_idx]) * 0.001;
+ } else {
+ cgi_timeout =
+ atof(config_options[REQUEST_TIMEOUT].default_value) * 0.001;
+ }
+#endif
+ if (cfg_buffering != NULL) {
+ if (!mg_strcasecmp(cfg_buffering, "no")) {
+ no_buffering = 1;
+ }
+ }
+
+ buf = NULL;
+ buflen = conn->phys_ctx->max_request_size;
+ i = prepare_cgi_environment(conn, prog, &blk, cgi_config_idx);
+ if (i != 0) {
+ blk.buf = NULL;
+ blk.var = NULL;
+ goto done;
+ }
+
+ /* CGI must be executed in its own directory. 'dir' must point to the
+ * directory containing executable program, 'p' must point to the
+ * executable program name relative to 'dir'. */
+ (void)mg_snprintf(conn, &truncated, dir, sizeof(dir), "%s", prog);
+
+ if (truncated) {
+ mg_cry_internal(conn, "Error: CGI program \"%s\": Path too long", prog);
+ mg_send_http_error(conn, 500, "Error: %s", "CGI path too long");
+ goto done;
+ }
+
+ if ((p = strrchr(dir, '/')) != NULL) {
+ *p++ = '\0';
+ } else {
+ dir[0] = '.';
+ dir[1] = '\0';
+ p = (char *)prog;
+ }
+
+ if ((pipe(fdin) != 0) || (pipe(fdout) != 0) || (pipe(fderr) != 0)) {
+ status = strerror(ERRNO);
+ mg_cry_internal(
+ conn,
+ "Error: CGI program \"%s\": Can not create CGI pipes: %s",
+ prog,
+ status);
+ mg_send_http_error(conn,
+ 500,
+ "Error: Cannot create CGI pipe: %s",
+ status);
+ goto done;
+ }
+
+ proc = (struct process_control_data *)
+ mg_malloc_ctx(sizeof(struct process_control_data), conn->phys_ctx);
+ if (proc == NULL) {
+ mg_cry_internal(conn, "Error: CGI program \"%s\": Out or memory", prog);
+ mg_send_http_error(conn, 500, "Error: Out of memory [%s]", prog);
+ goto done;
+ }
+
+ DEBUG_TRACE("CGI: spawn %s %s\n", dir, p);
+ pid = spawn_process(
+ conn, p, blk.buf, blk.var, fdin, fdout, fderr, dir, cgi_config_idx);
+
+ if (pid == (pid_t)-1) {
+ status = strerror(ERRNO);
+ mg_cry_internal(
+ conn,
+ "Error: CGI program \"%s\": Can not spawn CGI process: %s",
+ prog,
+ status);
+ mg_send_http_error(conn, 500, "Error: Cannot spawn CGI process");
+ mg_free(proc);
+ proc = NULL;
+ goto done;
+ }
+
+ /* Store data in shared process_control_data */
+ proc->pid = pid;
+ proc->references = 1;
+
+#if defined(USE_TIMERS)
+ if (cgi_timeout > 0.0) {
+ proc->references = 2;
+
+ // Start a timer for CGI
+ timer_add(conn->phys_ctx,
+ cgi_timeout /* in seconds */,
+ 0.0,
+ 1,
+ abort_cgi_process,
+ (void *)proc,
+ NULL);
+ }
+#endif
+
+ /* Parent closes only one side of the pipes.
+ * If we don't mark them as closed, close() attempt before
+ * return from this function throws an exception on Windows.
+ * Windows does not like when closed descriptor is closed again. */
+ (void)close(fdin[0]);
+ (void)close(fdout[1]);
+ (void)close(fderr[1]);
+ fdin[0] = fdout[1] = fderr[1] = -1;
+
+ if (((in = fdopen(fdin[1], "wb")) == NULL)
+ || ((out = fdopen(fdout[0], "rb")) == NULL)
+ || ((err = fdopen(fderr[0], "rb")) == NULL)) {
+ status = strerror(ERRNO);
+ mg_cry_internal(conn,
+ "Error: CGI program \"%s\": Can not open fd: %s",
+ prog,
+ status);
+ mg_send_http_error(conn,
+ 500,
+ "Error: CGI can not open fd\nfdopen: %s",
+ status);
+ goto done;
+ }
+
+ setbuf(in, NULL);
+ setbuf(out, NULL);
+ setbuf(err, NULL);
+ fout.access.fp = out;
+
+ if ((conn->content_len != 0) || (conn->is_chunked)) {
+ DEBUG_TRACE("CGI: send body data (%" INT64_FMT ")\n",
+ conn->content_len);
+
+ /* This is a POST/PUT request, or another request with body data. */
+ if (!forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
+ /* Error sending the body data */
+ mg_cry_internal(
+ conn,
+ "Error: CGI program \"%s\": Forward body data failed",
+ prog);
+ goto done;
+ }
+ }
+
+ /* Close so child gets an EOF. */
+ fclose(in);
+ in = NULL;
+ fdin[1] = -1;
+
+ /* Now read CGI reply into a buffer. We need to set correct
+ * status code, thus we need to see all HTTP headers first.
+ * Do not send anything back to client, until we buffer in all
+ * HTTP headers. */
+ data_len = 0;
+ buf = (char *)mg_malloc_ctx(buflen, conn->phys_ctx);
+ if (buf == NULL) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: Not enough memory for CGI buffer (%u bytes)",
+ (unsigned int)buflen);
+ mg_cry_internal(
+ conn,
+ "Error: CGI program \"%s\": Not enough memory for buffer (%u "
+ "bytes)",
+ prog,
+ (unsigned int)buflen);
+ goto done;
+ }
+
+ DEBUG_TRACE("CGI: %s", "wait for response");
+ headers_len = read_message(out, conn, buf, (int)buflen, &data_len);
+ DEBUG_TRACE("CGI: response: %li", (signed long)headers_len);
+
+ if (headers_len <= 0) {
+
+ /* Could not parse the CGI response. Check if some error message on
+ * stderr. */
+ i = pull_all(err, conn, buf, (int)buflen);
+ if (i > 0) {
+ /* CGI program explicitly sent an error */
+ /* Write the error message to the internal log */
+ mg_cry_internal(conn,
+ "Error: CGI program \"%s\" sent error "
+ "message: [%.*s]",
+ prog,
+ i,
+ buf);
+ /* Don't send the error message back to the client */
+ mg_send_http_error(conn,
+ 500,
+ "Error: CGI program \"%s\" failed.",
+ prog);
+ } else {
+ /* CGI program did not explicitly send an error, but a broken
+ * respon header */
+ mg_cry_internal(conn,
+ "Error: CGI program sent malformed or too big "
+ "(>%u bytes) HTTP headers: [%.*s]",
+ (unsigned)buflen,
+ data_len,
+ buf);
+
+ mg_send_http_error(conn,
+ 500,
+ "Error: CGI program sent malformed or too big "
+ "(>%u bytes) HTTP headers: [%.*s]",
+ (unsigned)buflen,
+ data_len,
+ buf);
+ }
+
+ /* in both cases, abort processing CGI */
+ goto done;
+ }
+
+ pbuf = buf;
+ buf[headers_len - 1] = '\0';
+ ri.num_headers = parse_http_headers(&pbuf, ri.http_headers);
+
+ /* Make up and send the status line */
+ status_text = "OK";
+ if ((status = get_header(ri.http_headers, ri.num_headers, "Status"))
+ != NULL) {
+ conn->status_code = atoi(status);
+ status_text = status;
+ while (isdigit((unsigned char)*status_text) || *status_text == ' ') {
+ status_text++;
+ }
+ } else if (get_header(ri.http_headers, ri.num_headers, "Location")
+ != NULL) {
+ conn->status_code = 307;
+ } else {
+ conn->status_code = 200;
+ }
+
+ if (!should_keep_alive(conn)) {
+ conn->must_close = 1;
+ }
+
+ DEBUG_TRACE("CGI: response %u %s", conn->status_code, status_text);
+
+ (void)mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code, status_text);
+
+ /* Send headers */
+ for (i = 0; i < ri.num_headers; i++) {
+ DEBUG_TRACE("CGI header: %s: %s",
+ ri.http_headers[i].name,
+ ri.http_headers[i].value);
+ mg_printf(conn,
+ "%s: %s\r\n",
+ ri.http_headers[i].name,
+ ri.http_headers[i].value);
+ }
+ mg_write(conn, "\r\n", 2);
+
+ /* Send chunk of data that may have been read after the headers */
+ mg_write(conn, buf + headers_len, (size_t)(data_len - headers_len));
+
+ /* Read the rest of CGI output and send to the client */
+ DEBUG_TRACE("CGI: %s", "forward all data");
+ send_file_data(conn, &fout, 0, INT64_MAX, no_buffering); /* send CGI data */
+ DEBUG_TRACE("CGI: %s", "all data sent");
+
+done:
+ mg_free(blk.var);
+ mg_free(blk.buf);
+
+ if (pid != (pid_t)-1) {
+ abort_cgi_process((void *)proc);
+ }
+
+ if (fdin[0] != -1) {
+ close(fdin[0]);
+ }
+ if (fdout[1] != -1) {
+ close(fdout[1]);
+ }
+ if (fderr[1] != -1) {
+ close(fderr[1]);
+ }
+
+ if (in != NULL) {
+ fclose(in);
+ } else if (fdin[1] != -1) {
+ close(fdin[1]);
+ }
+
+ if (out != NULL) {
+ fclose(out);
+ } else if (fdout[0] != -1) {
+ close(fdout[0]);
+ }
+
+ if (err != NULL) {
+ fclose(err);
+ } else if (fderr[0] != -1) {
+ close(fderr[0]);
+ }
+
+ mg_free(buf);
+}
+#endif /* !NO_CGI */
+
+
+#if !defined(NO_FILES)
+static void
+dav_mkcol(struct mg_connection *conn, const char *path)
+{
+ int rc, body_len;
+ struct de de;
+
+ if (conn == NULL) {
+ return;
+ }
+
+ /* TODO (mid): Check the mg_send_http_error situations in this function
+ */
+
+ memset(&de.file, 0, sizeof(de.file));
+ if (!mg_stat(conn, path, &de.file)) {
+ mg_cry_internal(conn,
+ "%s: mg_stat(%s) failed: %s",
+ __func__,
+ path,
+ strerror(ERRNO));
+ }
+
+ if (de.file.last_modified) {
+ /* TODO (mid): This check does not seem to make any sense ! */
+ /* TODO (mid): Add a webdav unit test first, before changing
+ * anything here. */
+ mg_send_http_error(
+ conn, 405, "Error: mkcol(%s): %s", path, strerror(ERRNO));
+ return;
+ }
+
+ body_len = conn->data_len - conn->request_len;
+ if (body_len > 0) {
+ mg_send_http_error(
+ conn, 415, "Error: mkcol(%s): %s", path, strerror(ERRNO));
+ return;
+ }
+
+ rc = mg_mkdir(conn, path, 0755);
+ DEBUG_TRACE("mkdir %s: %i", path, rc);
+ if (rc == 0) {
+ /* Create 201 "Created" response */
+ mg_response_header_start(conn, 201);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+
+ /* Send all headers - there is no body */
+ mg_response_header_send(conn);
+ } else {
+ int http_status = 500;
+ switch (errno) {
+ case EEXIST:
+ http_status = 405;
+ break;
+ case EACCES:
+ http_status = 403;
+ break;
+ case ENOENT:
+ http_status = 409;
+ break;
+ }
+
+ mg_send_http_error(conn,
+ http_status,
+ "Error processing %s: %s",
+ path,
+ strerror(ERRNO));
+ }
+}
+
+
+/* Forward decrlaration */
+static int get_uri_type(const char *uri);
+static const char *
+get_rel_url_at_current_server(const char *uri,
+ const struct mg_connection *conn);
+
+
+static void
+dav_move_file(struct mg_connection *conn, const char *path, int do_copy)
+{
+ const char *overwrite_hdr;
+ const char *destination_hdr;
+ const char *root;
+ int rc, dest_uri_type;
+ int http_status = 400;
+ int do_overwrite = 0;
+ int destination_ok = 0;
+ char dest_path[UTF8_PATH_MAX];
+ struct mg_file_stat ignored;
+
+ if (conn == NULL) {
+ return;
+ }
+
+ root = conn->dom_ctx->config[DOCUMENT_ROOT];
+ overwrite_hdr = mg_get_header(conn, "Overwrite");
+ destination_hdr = mg_get_header(conn, "Destination");
+ if ((overwrite_hdr != NULL) && (toupper(overwrite_hdr[0]) == 'T')) {
+ do_overwrite = 1;
+ }
+
+ if ((destination_hdr == NULL) || (destination_hdr[0] == 0)) {
+ mg_send_http_error(conn, 400, "%s", "Missing destination");
+ return;
+ }
+
+ if (root != NULL) {
+ char *local_dest = NULL;
+ dest_uri_type = get_uri_type(destination_hdr);
+ if (dest_uri_type == 2) {
+ local_dest = mg_strdup_ctx(destination_hdr, conn->phys_ctx);
+ } else if ((dest_uri_type == 3) || (dest_uri_type == 4)) {
+ const char *h =
+ get_rel_url_at_current_server(destination_hdr, conn);
+ if (h) {
+ size_t len = strlen(h);
+ local_dest = mg_malloc_ctx(len + 1, conn->phys_ctx);
+ mg_url_decode(h, (int)len, local_dest, (int)len + 1, 0);
+ }
+ }
+ if (local_dest != NULL) {
+ remove_dot_segments(local_dest);
+ if (local_dest[0] == '/') {
+ int trunc_check = 0;
+ mg_snprintf(conn,
+ &trunc_check,
+ dest_path,
+ sizeof(dest_path),
+ "%s/%s",
+ root,
+ local_dest);
+ if (trunc_check == 0) {
+ destination_ok = 1;
+ }
+ }
+ mg_free(local_dest);
+ }
+ }
+
+ if (!destination_ok) {
+ mg_send_http_error(conn, 502, "%s", "Illegal destination");
+ return;
+ }
+
+ /* Check now if this file exists */
+ if (mg_stat(conn, dest_path, &ignored)) {
+ /* File exists */
+ if (do_overwrite) {
+ /* Overwrite allowed: delete the file first */
+ if (0 != remove(dest_path)) {
+ /* No overwrite: return error */
+ mg_send_http_error(conn,
+ 403,
+ "Cannot overwrite file: %s",
+ dest_path);
+ return;
+ }
+ } else {
+ /* No overwrite: return error */
+ mg_send_http_error(conn,
+ 412,
+ "Destination already exists: %s",
+ dest_path);
+ return;
+ }
+ }
+
+ /* Copy / Move / Rename operation. */
+ DEBUG_TRACE("%s %s to %s", (do_copy ? "copy" : "move"), path, dest_path);
+#if defined(_WIN32)
+ {
+ /* For Windows, we need to convert from UTF-8 to UTF-16 first. */
+ wchar_t wSource[UTF16_PATH_MAX];
+ wchar_t wDest[UTF16_PATH_MAX];
+ BOOL ok;
+
+ path_to_unicode(conn, path, wSource, ARRAY_SIZE(wSource));
+ path_to_unicode(conn, dest_path, wDest, ARRAY_SIZE(wDest));
+ if (do_copy) {
+ ok = CopyFileW(wSource, wDest, do_overwrite ? FALSE : TRUE);
+ } else {
+ ok = MoveFileExW(wSource,
+ wDest,
+ do_overwrite ? MOVEFILE_REPLACE_EXISTING : 0);
+ }
+ if (ok) {
+ rc = 0;
+ } else {
+ DWORD lastErr = GetLastError();
+ if (lastErr == ERROR_ALREADY_EXISTS) {
+ mg_send_http_error(conn,
+ 412,
+ "Destination already exists: %s",
+ dest_path);
+ return;
+ }
+ rc = -1;
+ http_status = 400;
+ }
+ }
+
+#else
+ {
+ /* Linux uses already UTF-8, we don't need to convert file names. */
+
+ if (do_copy) {
+ /* TODO: COPY for Linux. */
+ mg_send_http_error(conn, 403, "%s", "COPY forbidden");
+ return;
+ }
+
+ rc = rename(path, dest_path);
+ if (rc) {
+ switch (errno) {
+ case EEXIST:
+ http_status = 412;
+ break;
+ case EACCES:
+ http_status = 403;
+ break;
+ case ENOENT:
+ http_status = 409;
+ break;
+ }
+ }
+ }
+#endif
+
+ if (rc == 0) {
+ /* Create 204 "No Content" response */
+ mg_response_header_start(conn, 204);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+
+ /* Send all headers - there is no body */
+ mg_response_header_send(conn);
+ } else {
+ mg_send_http_error(conn, http_status, "Operation failed");
+ }
+}
+
+
+static void
+put_file(struct mg_connection *conn, const char *path)
+{
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ const char *range;
+ int64_t r1, r2;
+ int rc;
+
+ if (conn == NULL) {
+ return;
+ }
+
+ DEBUG_TRACE("store %s", path);
+
+ if (mg_stat(conn, path, &file.stat)) {
+ /* File already exists */
+ conn->status_code = 200;
+
+ if (file.stat.is_directory) {
+ /* This is an already existing directory,
+ * so there is nothing to do for the server. */
+ rc = 0;
+
+ } else {
+ /* File exists and is not a directory. */
+ /* Can it be replaced? */
+
+ /* Check if the server may write this file */
+ if (access(path, W_OK) == 0) {
+ /* Access granted */
+ rc = 1;
+ } else {
+ mg_send_http_error(
+ conn,
+ 403,
+ "Error: Put not possible\nReplacing %s is not allowed",
+ path);
+ return;
+ }
+ }
+ } else {
+ /* File should be created */
+ conn->status_code = 201;
+ rc = put_dir(conn, path);
+ }
+
+ if (rc == 0) {
+ /* put_dir returns 0 if path is a directory */
+
+ /* Create response */
+ mg_response_header_start(conn, conn->status_code);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+
+ /* Send all headers - there is no body */
+ mg_response_header_send(conn);
+
+ /* Request to create a directory has been fulfilled successfully.
+ * No need to put a file. */
+ return;
+ }
+
+ if (rc == -1) {
+ /* put_dir returns -1 if the path is too long */
+ mg_send_http_error(conn,
+ 414,
+ "Error: Path too long\nput_dir(%s): %s",
+ path,
+ strerror(ERRNO));
+ return;
+ }
+
+ if (rc == -2) {
+ /* put_dir returns -2 if the directory can not be created */
+ mg_send_http_error(conn,
+ 500,
+ "Error: Can not create directory\nput_dir(%s): %s",
+ path,
+ strerror(ERRNO));
+ return;
+ }
+
+ /* A file should be created or overwritten. */
+ /* Currently CivetWeb does not need read+write access. */
+ if (!mg_fopen(conn, path, MG_FOPEN_MODE_WRITE, &file)
+ || file.access.fp == NULL) {
+ (void)mg_fclose(&file.access);
+ mg_send_http_error(conn,
+ 500,
+ "Error: Can not create file\nfopen(%s): %s",
+ path,
+ strerror(ERRNO));
+ return;
+ }
+
+ fclose_on_exec(&file.access, conn);
+ range = mg_get_header(conn, "Content-Range");
+ r1 = r2 = 0;
+ if ((range != NULL) && parse_range_header(range, &r1, &r2) > 0) {
+ conn->status_code = 206; /* Partial content */
+ if (0 != fseeko(file.access.fp, r1, SEEK_SET)) {
+ mg_send_http_error(conn,
+ 500,
+ "Error: Internal error processing file %s",
+ path);
+ return;
+ }
+ }
+
+ if (!forward_body_data(conn, file.access.fp, INVALID_SOCKET, NULL)) {
+ /* forward_body_data failed.
+ * The error code has already been sent to the client,
+ * and conn->status_code is already set. */
+ (void)mg_fclose(&file.access);
+ return;
+ }
+
+ if (mg_fclose(&file.access) != 0) {
+ /* fclose failed. This might have different reasons, but a likely
+ * one is "no space on disk", http 507. */
+ conn->status_code = 507;
+ }
+
+ /* Create response (status_code has been set before) */
+ mg_response_header_start(conn, conn->status_code);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+
+ /* Send all headers - there is no body */
+ mg_response_header_send(conn);
+}
+
+
+static void
+delete_file(struct mg_connection *conn, const char *path)
+{
+ struct de de;
+ memset(&de.file, 0, sizeof(de.file));
+ if (!mg_stat(conn, path, &de.file)) {
+ /* mg_stat returns 0 if the file does not exist */
+ mg_send_http_error(conn,
+ 404,
+ "Error: Cannot delete file\nFile %s not found",
+ path);
+ return;
+ }
+
+ DEBUG_TRACE("delete %s", path);
+
+ if (de.file.is_directory) {
+ if (remove_directory(conn, path)) {
+ /* Delete is successful: Return 204 without content. */
+ mg_send_http_error(conn, 204, "%s", "");
+ } else {
+ /* Delete is not successful: Return 500 (Server error). */
+ mg_send_http_error(conn, 500, "Error: Could not delete %s", path);
+ }
+ return;
+ }
+
+ /* This is an existing file (not a directory).
+ * Check if write permission is granted. */
+ if (access(path, W_OK) != 0) {
+ /* File is read only */
+ mg_send_http_error(
+ conn,
+ 403,
+ "Error: Delete not possible\nDeleting %s is not allowed",
+ path);
+ return;
+ }
+
+ /* Try to delete it. */
+ if (mg_remove(conn, path) == 0) {
+ /* Delete was successful: Return 204 without content. */
+ mg_response_header_start(conn, 204);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn, "Content-Length", "0", -1);
+ mg_response_header_send(conn);
+
+ } else {
+ /* Delete not successful (file locked). */
+ mg_send_http_error(conn,
+ 423,
+ "Error: Cannot delete file\nremove(%s): %s",
+ path,
+ strerror(ERRNO));
+ }
+}
+#endif /* !NO_FILES */
+
+
+#if !defined(NO_FILESYSTEMS)
+static void
+send_ssi_file(struct mg_connection *, const char *, struct mg_file *, int);
+
+
+static void
+do_ssi_include(struct mg_connection *conn,
+ const char *ssi,
+ char *tag,
+ int include_level)
+{
+ char file_name[MG_BUF_LEN], path[512], *p;
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ size_t len;
+ int truncated = 0;
+
+ if (conn == NULL) {
+ return;
+ }
+
+ /* sscanf() is safe here, since send_ssi_file() also uses buffer
+ * of size MG_BUF_LEN to get the tag. So strlen(tag) is
+ * always < MG_BUF_LEN. */
+ if (sscanf(tag, " virtual=\"%511[^\"]\"", file_name) == 1) {
+ /* File name is relative to the webserver root */
+ file_name[511] = 0;
+ (void)mg_snprintf(conn,
+ &truncated,
+ path,
+ sizeof(path),
+ "%s/%s",
+ conn->dom_ctx->config[DOCUMENT_ROOT],
+ file_name);
+
+ } else if (sscanf(tag, " abspath=\"%511[^\"]\"", file_name) == 1) {
+ /* File name is relative to the webserver working directory
+ * or it is absolute system path */
+ file_name[511] = 0;
+ (void)
+ mg_snprintf(conn, &truncated, path, sizeof(path), "%s", file_name);
+
+ } else if ((sscanf(tag, " file=\"%511[^\"]\"", file_name) == 1)
+ || (sscanf(tag, " \"%511[^\"]\"", file_name) == 1)) {
+ /* File name is relative to the current document */
+ file_name[511] = 0;
+ (void)mg_snprintf(conn, &truncated, path, sizeof(path), "%s", ssi);
+
+ if (!truncated) {
+ if ((p = strrchr(path, '/')) != NULL) {
+ p[1] = '\0';
+ }
+ len = strlen(path);
+ (void)mg_snprintf(conn,
+ &truncated,
+ path + len,
+ sizeof(path) - len,
+ "%s",
+ file_name);
+ }
+
+ } else {
+ mg_cry_internal(conn, "Bad SSI #include: [%s]", tag);
+ return;
+ }
+
+ if (truncated) {
+ mg_cry_internal(conn, "SSI #include path length overflow: [%s]", tag);
+ return;
+ }
+
+ if (!mg_fopen(conn, path, MG_FOPEN_MODE_READ, &file)) {
+ mg_cry_internal(conn,
+ "Cannot open SSI #include: [%s]: fopen(%s): %s",
+ tag,
+ path,
+ strerror(ERRNO));
+ } else {
+ fclose_on_exec(&file.access, conn);
+ if (match_prefix_strlen(conn->dom_ctx->config[SSI_EXTENSIONS], path)
+ > 0) {
+ send_ssi_file(conn, path, &file, include_level + 1);
+ } else {
+ send_file_data(conn, &file, 0, INT64_MAX, 0); /* send static file */
+ }
+ (void)mg_fclose(&file.access); /* Ignore errors for readonly files */
+ }
+}
+
+
+#if !defined(NO_POPEN)
+static void
+do_ssi_exec(struct mg_connection *conn, char *tag)
+{
+ char cmd[1024] = "";
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+
+ if (sscanf(tag, " \"%1023[^\"]\"", cmd) != 1) {
+ mg_cry_internal(conn, "Bad SSI #exec: [%s]", tag);
+ } else {
+ cmd[1023] = 0;
+ if ((file.access.fp = popen(cmd, "r")) == NULL) {
+ mg_cry_internal(conn,
+ "Cannot SSI #exec: [%s]: %s",
+ cmd,
+ strerror(ERRNO));
+ } else {
+ send_file_data(conn, &file, 0, INT64_MAX, 0); /* send static file */
+ pclose(file.access.fp);
+ }
+ }
+}
+#endif /* !NO_POPEN */
+
+
+static int
+mg_fgetc(struct mg_file *filep)
+{
+ if (filep == NULL) {
+ return EOF;
+ }
+
+ if (filep->access.fp != NULL) {
+ return fgetc(filep->access.fp);
+ } else {
+ return EOF;
+ }
+}
+
+
+static void
+send_ssi_file(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *filep,
+ int include_level)
+{
+ char buf[MG_BUF_LEN];
+ int ch, len, in_tag, in_ssi_tag;
+
+ if (include_level > 10) {
+ mg_cry_internal(conn, "SSI #include level is too deep (%s)", path);
+ return;
+ }
+
+ in_tag = in_ssi_tag = len = 0;
+
+ /* Read file, byte by byte, and look for SSI include tags */
+ while ((ch = mg_fgetc(filep)) != EOF) {
+
+ if (in_tag) {
+ /* We are in a tag, either SSI tag or html tag */
+
+ if (ch == '>') {
+ /* Tag is closing */
+ buf[len++] = '>';
+
+ if (in_ssi_tag) {
+ /* Handle SSI tag */
+ buf[len] = 0;
+
+ if ((len > 12) && !memcmp(buf + 5, "include", 7)) {
+ do_ssi_include(conn, path, buf + 12, include_level + 1);
+#if !defined(NO_POPEN)
+ } else if ((len > 9) && !memcmp(buf + 5, "exec", 4)) {
+ do_ssi_exec(conn, buf + 9);
+#endif /* !NO_POPEN */
+ } else {
+ mg_cry_internal(conn,
+ "%s: unknown SSI "
+ "command: \"%s\"",
+ path,
+ buf);
+ }
+ len = 0;
+ in_ssi_tag = in_tag = 0;
+
+ } else {
+ /* Not an SSI tag */
+ /* Flush buffer */
+ (void)mg_write(conn, buf, (size_t)len);
+ len = 0;
+ in_tag = 0;
+ }
+
+ } else {
+ /* Tag is still open */
+ buf[len++] = (char)(ch & 0xff);
+
+ if ((len == 5) && !memcmp(buf, "<!--#", 5)) {
+ /* All SSI tags start with <!--# */
+ in_ssi_tag = 1;
+ }
+
+ if ((len + 2) > (int)sizeof(buf)) {
+ /* Tag to long for buffer */
+ mg_cry_internal(conn, "%s: tag is too large", path);
+ return;
+ }
+ }
+
+ } else {
+
+ /* We are not in a tag yet. */
+ if (ch == '<') {
+ /* Tag is opening */
+ in_tag = 1;
+
+ if (len > 0) {
+ /* Flush current buffer.
+ * Buffer is filled with "len" bytes. */
+ (void)mg_write(conn, buf, (size_t)len);
+ }
+ /* Store the < */
+ len = 1;
+ buf[0] = '<';
+
+ } else {
+ /* No Tag */
+ /* Add data to buffer */
+ buf[len++] = (char)(ch & 0xff);
+ /* Flush if buffer is full */
+ if (len == (int)sizeof(buf)) {
+ mg_write(conn, buf, (size_t)len);
+ len = 0;
+ }
+ }
+ }
+ }
+
+ /* Send the rest of buffered data */
+ if (len > 0) {
+ mg_write(conn, buf, (size_t)len);
+ }
+}
+
+
+static void
+handle_ssi_file_request(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *filep)
+{
+ char date[64];
+ time_t curtime = time(NULL);
+
+ if ((conn == NULL) || (path == NULL) || (filep == NULL)) {
+ return;
+ }
+
+ if (!mg_fopen(conn, path, MG_FOPEN_MODE_READ, filep)) {
+ /* File exists (precondition for calling this function),
+ * but can not be opened by the server. */
+ mg_send_http_error(conn,
+ 500,
+ "Error: Cannot read file\nfopen(%s): %s",
+ path,
+ strerror(ERRNO));
+ } else {
+ /* Set "must_close" for HTTP/1.x, since we do not know the
+ * content length */
+ conn->must_close = 1;
+ gmt_time_string(date, sizeof(date), &curtime);
+ fclose_on_exec(&filep->access, conn);
+
+ /* 200 OK response */
+ mg_response_header_start(conn, 200);
+ send_no_cache_header(conn);
+ send_additional_header(conn);
+ send_cors_header(conn);
+ mg_response_header_add(conn, "Content-Type", "text/html", -1);
+ mg_response_header_send(conn);
+
+ /* Header sent, now send body */
+ send_ssi_file(conn, path, filep, 0);
+ (void)mg_fclose(&filep->access); /* Ignore errors for readonly files */
+ }
+}
+#endif /* NO_FILESYSTEMS */
+
+
+#if !defined(NO_FILES)
+static void
+send_options(struct mg_connection *conn)
+{
+ if (!conn || !all_methods) {
+ return;
+ }
+
+ /* We do not set a "Cache-Control" header here, but leave the default.
+ * Since browsers do not send an OPTIONS request, we can not test the
+ * effect anyway. */
+
+ mg_response_header_start(conn, 200);
+ mg_response_header_add(conn, "Content-Type", "text/html", -1);
+
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP1) {
+ /* Use the same as before */
+ mg_response_header_add(conn, "Allow", all_methods, -1);
+ mg_response_header_add(conn, "DAV", "1", -1);
+ } else {
+ /* TODO: Check this later for HTTP/2 */
+ mg_response_header_add(conn, "Allow", "GET, POST", -1);
+ }
+ send_additional_header(conn);
+ mg_response_header_send(conn);
+}
+
+
+/* Writes PROPFIND properties for a collection element */
+static int
+print_props(struct mg_connection *conn,
+ const char *uri,
+ const char *name,
+ struct mg_file_stat *filep)
+{
+ size_t i;
+ char mtime[64];
+ char link_buf[UTF8_PATH_MAX * 2]; /* Path + server root */
+ char *link_concat;
+ size_t link_concat_len;
+
+ if ((conn == NULL) || (uri == NULL) || (name == NULL) || (filep == NULL)) {
+ return 0;
+ }
+
+ link_concat_len = strlen(uri) + strlen(name) + 1;
+ link_concat = mg_malloc_ctx(link_concat_len, conn->phys_ctx);
+ if (!link_concat) {
+ return 0;
+ }
+ strcpy(link_concat, uri);
+ strcat(link_concat, name);
+
+ /* Get full link used in request */
+ mg_construct_local_link(
+ conn, link_buf, sizeof(link_buf), NULL, 0, link_concat);
+
+ /*
+ OutputDebugStringA("print_props:\n uri: ");
+ OutputDebugStringA(uri);
+ OutputDebugStringA("\n name: ");
+ OutputDebugStringA(name);
+ OutputDebugStringA("\n link: ");
+ OutputDebugStringA(link_buf);
+ OutputDebugStringA("\n");
+ */
+
+ gmt_time_string(mtime, sizeof(mtime), &filep->last_modified);
+ mg_printf(conn,
+ "<d:response>"
+ "<d:href>%s</d:href>"
+ "<d:propstat>"
+ "<d:prop>"
+ "<d:resourcetype>%s</d:resourcetype>"
+ "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
+ "<d:getlastmodified>%s</d:getlastmodified>"
+ "<d:lockdiscovery>",
+ link_buf,
+ filep->is_directory ? "<d:collection/>" : "",
+ filep->size,
+ mtime);
+
+ for (i = 0; i < NUM_WEBDAV_LOCKS; i++) {
+ struct twebdav_lock *dav_lock = conn->phys_ctx->webdav_lock;
+ if (!strcmp(dav_lock[i].path, link_buf)) {
+ mg_printf(conn,
+ "<d:activelock>"
+ "<d:locktype><d:write/></d:locktype>"
+ "<d:lockscope><d:exclusive/></d:lockscope>"
+ "<d:depth>0</d:depth>"
+ "<d:owner>%s</d:owner>"
+ "<d:timeout>Second-%u</d:timeout>"
+ "<d:locktoken>"
+ "<d:href>%s</d:href>"
+ "</d:locktoken>"
+ "</d:activelock>\n",
+ dav_lock[i].user,
+ (unsigned)LOCK_DURATION_S,
+ dav_lock[i].token);
+ }
+ }
+
+ mg_printf(conn,
+ "</d:lockdiscovery>"
+ "</d:prop>"
+ "<d:status>HTTP/1.1 200 OK</d:status>"
+ "</d:propstat>"
+ "</d:response>\n");
+
+ mg_free(link_concat);
+ return 1;
+}
+
+
+static int
+print_dav_dir_entry(struct de *de, void *data)
+{
+ struct mg_connection *conn = (struct mg_connection *)data;
+ if (!de || !conn
+ || !print_props(
+ conn, conn->request_info.local_uri, de->file_name, &de->file)) {
+ /* stop scan */
+ return 1;
+ }
+ return 0;
+}
+
+
+static void
+handle_propfind(struct mg_connection *conn,
+ const char *path,
+ struct mg_file_stat *filep)
+{
+ const char *depth = mg_get_header(conn, "Depth");
+
+ if (!conn || !path || !filep || !conn->dom_ctx) {
+ return;
+ }
+
+ /* return 207 "Multi-Status" */
+ conn->must_close = 1;
+ mg_response_header_start(conn, 207);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn,
+ "Content-Type",
+ "application/xml; charset=utf-8",
+ -1);
+ mg_response_header_send(conn);
+
+ /* Content */
+ mg_printf(conn,
+ "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<d:multistatus xmlns:d='DAV:'>\n");
+
+ /* Print properties for the requested resource itself */
+ print_props(conn, conn->request_info.local_uri, "", filep);
+
+ /* If it is a directory, print directory entries too if Depth is not 0
+ */
+ if (filep->is_directory
+ && !mg_strcasecmp(conn->dom_ctx->config[ENABLE_DIRECTORY_LISTING],
+ "yes")
+ && ((depth == NULL) || (strcmp(depth, "0") != 0))) {
+ scan_directory(conn, path, conn, &print_dav_dir_entry);
+ }
+
+ mg_printf(conn, "%s\n", "</d:multistatus>");
+}
+
+
+static void
+dav_lock_file(struct mg_connection *conn, const char *path)
+{
+ /* internal function - therefore conn is assumed to be valid */
+ char link_buf[UTF8_PATH_MAX * 2]; /* Path + server root */
+ uint64_t new_locktime;
+ int lock_index = -1;
+ int i;
+ uint64_t LOCK_DURATION_NS =
+ (uint64_t)(LOCK_DURATION_S) * (uint64_t)1000000000;
+ struct twebdav_lock *dav_lock = conn->phys_ctx->webdav_lock;
+
+ if (!path || !conn->dom_ctx || !conn->request_info.remote_user) {
+ return;
+ }
+ mg_get_request_link(conn, link_buf, sizeof(link_buf));
+
+ /* const char *refresh = mg_get_header(conn, "If"); */
+ /* Link refresh should have an "If" header:
+ * http://www.webdav.org/specs/rfc2518.html#n-example---refreshing-a-write-lock
+ * But it seems Windows Explorer does not send them.
+ */
+
+ mg_lock_context(conn->phys_ctx);
+ new_locktime = mg_get_current_time_ns();
+
+ /* Find a slot for a lock */
+ while (lock_index < 0) {
+ /* find existing lock */
+ for (i = 0; i < NUM_WEBDAV_LOCKS; i++) {
+ if (!strcmp(dav_lock[i].path, link_buf)) {
+ if (!strcmp(conn->request_info.remote_user, dav_lock[i].user)) {
+ /* locked by the same user */
+ dav_lock[i].locktime = new_locktime;
+ lock_index = i;
+ break;
+ } else {
+ /* already locked by someone else */
+ if (new_locktime
+ > (dav_lock[i].locktime + LOCK_DURATION_NS)) {
+ /* Lock expired */
+ dav_lock[i].path[0] = 0;
+ } else {
+ /* Lock still valid */
+ mg_unlock_context(conn->phys_ctx);
+ mg_send_http_error(conn, 423, "%s", "Already locked");
+ return;
+ }
+ }
+ }
+ }
+
+ /* create new lock token */
+ for (i = 0; i < NUM_WEBDAV_LOCKS; i++) {
+ if (dav_lock[i].path[0] == 0) {
+ char s[32];
+ dav_lock[i].locktime = mg_get_current_time_ns();
+ sprintf(s, "%" UINT64_FMT, (uint64_t)dav_lock[i].locktime);
+ mg_md5(dav_lock[i].token,
+ link_buf,
+ "\x01",
+ s,
+ "\x01",
+ conn->request_info.remote_user,
+ NULL);
+ mg_strlcpy(dav_lock[i].path,
+ link_buf,
+ sizeof(dav_lock[i].path));
+ mg_strlcpy(dav_lock[i].user,
+ conn->request_info.remote_user,
+ sizeof(dav_lock[i].user));
+ lock_index = i;
+ break;
+ }
+ }
+ if (lock_index < 0) {
+ /* too many locks. Find oldest lock */
+ uint64_t oldest_locktime = dav_lock[0].locktime;
+ lock_index = 0;
+ for (i = 1; i < NUM_WEBDAV_LOCKS; i++) {
+ if (dav_lock[i].locktime < oldest_locktime) {
+ oldest_locktime = dav_lock[i].locktime;
+ lock_index = i;
+ }
+ }
+ /* invalidate oldest lock */
+ dav_lock[lock_index].path[0] = 0;
+ }
+ }
+ mg_unlock_context(conn->phys_ctx);
+
+ /* return 200 "OK" */
+ conn->must_close = 1;
+ mg_response_header_start(conn, 200);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn,
+ "Content-Type",
+ "application/xml; charset=utf-8",
+ -1);
+ mg_response_header_add(conn, "Lock-Token", dav_lock[lock_index].token, -1);
+ mg_response_header_send(conn);
+
+ /* Content */
+ mg_printf(conn,
+ "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<d:prop xmlns:d=\"DAV:\">\n"
+ " <d:lockdiscovery>\n"
+ " <d:activelock>\n"
+ " <d:lockscope><d:exclusive/></d:lockscope>\n"
+ " <d:locktype><d:write/></d:locktype>\n"
+ " <d:owner>\n"
+ " <d:href>%s</d:href>\n"
+ " </d:owner>\n"
+ " <d:timeout>Second-%u</d:timeout>\n"
+ " <d:locktoken><d:href>%s</d:href></d:locktoken>\n"
+ " <d:lockroot>\n"
+ " <d:href>%s</d:href>\n"
+ " </d:lockroot>\n"
+ " </d:activelock>\n"
+ " </d:lockdiscovery>\n"
+ " </d:prop>\n",
+ dav_lock[lock_index].user,
+ (LOCK_DURATION_S),
+ dav_lock[lock_index].token,
+ dav_lock[lock_index].path);
+}
+
+
+static void
+dav_unlock_file(struct mg_connection *conn, const char *path)
+{
+ /* internal function - therefore conn is assumed to be valid */
+ char link_buf[UTF8_PATH_MAX * 2]; /* Path + server root */
+ struct twebdav_lock *dav_lock = conn->phys_ctx->webdav_lock;
+ int lock_index;
+
+ if (!path || !conn->dom_ctx || !conn->request_info.remote_user) {
+ return;
+ }
+
+ mg_get_request_link(conn, link_buf, sizeof(link_buf));
+
+ mg_lock_context(conn->phys_ctx);
+ /* find existing lock */
+ for (lock_index = 0; lock_index < NUM_WEBDAV_LOCKS; lock_index++) {
+ if (!strcmp(dav_lock[lock_index].path, link_buf)) {
+ /* Success: return 204 "No Content" */
+ mg_unlock_context(conn->phys_ctx);
+ conn->must_close = 1;
+ mg_response_header_start(conn, 204);
+ mg_response_header_send(conn);
+ return;
+ }
+ }
+ mg_unlock_context(conn->phys_ctx);
+
+ /* Error: Cannot unlock a resource that is not locked */
+ mg_send_http_error(conn, 423, "%s", "Lock not found");
+}
+
+
+static void
+dav_proppatch(struct mg_connection *conn, const char *path)
+{
+ char link_buf[UTF8_PATH_MAX * 2]; /* Path + server root */
+
+ if (!conn || !path || !conn->dom_ctx) {
+ return;
+ }
+
+ /* return 207 "Multi-Status" */
+ conn->must_close = 1;
+ mg_response_header_start(conn, 207);
+ send_static_cache_header(conn);
+ send_additional_header(conn);
+ mg_response_header_add(conn,
+ "Content-Type",
+ "application/xml; charset=utf-8",
+ -1);
+ mg_response_header_send(conn);
+
+ mg_get_request_link(conn, link_buf, sizeof(link_buf));
+
+ /* Content */
+ mg_printf(conn,
+ "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<d:multistatus xmlns:d='DAV:'>\n"
+ "<d:response>\n<d:href>%s</d:href>\n",
+ link_buf);
+ mg_printf(conn,
+ "<d:propstat><d:status>HTTP/1.1 403 "
+ "Forbidden</d:status></d:propstat>\n");
+ mg_printf(conn, "%s\n", "</d:response></d:multistatus>");
+}
+#endif
+
+
+CIVETWEB_API void
+mg_lock_connection(struct mg_connection *conn)
+{
+ if (conn) {
+ (void)pthread_mutex_lock(&conn->mutex);
+ }
+}
+
+
+CIVETWEB_API void
+mg_unlock_connection(struct mg_connection *conn)
+{
+ if (conn) {
+ (void)pthread_mutex_unlock(&conn->mutex);
+ }
+}
+
+
+CIVETWEB_API void
+mg_lock_context(struct mg_context *ctx)
+{
+ if (ctx && (ctx->context_type == CONTEXT_SERVER)) {
+ (void)pthread_mutex_lock(&ctx->nonce_mutex);
+ }
+}
+
+
+CIVETWEB_API void
+mg_unlock_context(struct mg_context *ctx)
+{
+ if (ctx && (ctx->context_type == CONTEXT_SERVER)) {
+ (void)pthread_mutex_unlock(&ctx->nonce_mutex);
+ }
+}
+
+
+#if defined(USE_LUA)
+#include "mod_lua.inl"
+#endif /* USE_LUA */
+
+#if defined(USE_DUKTAPE)
+#include "mod_duktape.inl"
+#endif /* USE_DUKTAPE */
+
+#if defined(USE_WEBSOCKET)
+
+#if !defined(NO_SSL_DL)
+#if !defined(OPENSSL_API_3_0)
+#define SHA_API static
+#include "sha1.inl"
+#endif
+#endif
+
+static int
+send_websocket_handshake(struct mg_connection *conn, const char *websock_key)
+{
+ static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+ char buf[100], sha[20], b64_sha[sizeof(sha) * 2];
+ size_t dst_len = sizeof(b64_sha);
+#if !defined(OPENSSL_API_3_0)
+ SHA_CTX sha_ctx;
+#endif
+ int truncated;
+
+ /* Calculate Sec-WebSocket-Accept reply from Sec-WebSocket-Key. */
+ mg_snprintf(conn, &truncated, buf, sizeof(buf), "%s%s", websock_key, magic);
+ if (truncated) {
+ conn->must_close = 1;
+ return 0;
+ }
+
+ DEBUG_TRACE("%s", "Send websocket handshake");
+
+#if defined(OPENSSL_API_3_0)
+ EVP_Digest((unsigned char *)buf,
+ (uint32_t)strlen(buf),
+ (unsigned char *)sha,
+ NULL,
+ EVP_get_digestbyname("sha1"),
+ NULL);
+#else
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, (unsigned char *)buf, (uint32_t)strlen(buf));
+ SHA1_Final((unsigned char *)sha, &sha_ctx);
+#endif
+ mg_base64_encode((unsigned char *)sha, sizeof(sha), b64_sha, &dst_len);
+ mg_printf(conn,
+ "HTTP/1.1 101 Switching Protocols\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Accept: %s\r\n",
+ b64_sha);
+
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ // Send negotiated compression extension parameters
+ websocket_deflate_response(conn);
+#endif
+
+ if (conn->request_info.acceptedWebSocketSubprotocol) {
+ mg_printf(conn,
+ "Sec-WebSocket-Protocol: %s\r\n\r\n",
+ conn->request_info.acceptedWebSocketSubprotocol);
+ } else {
+ mg_printf(conn, "%s", "\r\n");
+ }
+
+ return 1;
+}
+
+
+#if !defined(MG_MAX_UNANSWERED_PING)
+/* Configuration of the maximum number of websocket PINGs that might
+ * stay unanswered before the connection is considered broken.
+ * Note: The name of this define may still change (until it is
+ * defined as a compile parameter in a documentation).
+ */
+#define MG_MAX_UNANSWERED_PING (5)
+#endif
+
+
+static void
+read_websocket(struct mg_connection *conn,
+ mg_websocket_data_handler ws_data_handler,
+ void *callback_data)
+{
+ /* Pointer to the beginning of the portion of the incoming websocket
+ * message queue.
+ * The original websocket upgrade request is never removed, so the queue
+ * begins after it. */
+ unsigned char *buf = (unsigned char *)conn->buf + conn->request_len;
+ int n, error, exit_by_callback;
+ int ret;
+
+ /* body_len is the length of the entire queue in bytes
+ * len is the length of the current message
+ * data_len is the length of the current message's data payload
+ * header_len is the length of the current message's header */
+ size_t i, len, mask_len = 0, header_len, body_len;
+ uint64_t data_len = 0;
+
+ /* "The masking key is a 32-bit value chosen at random by the client."
+ * http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17#section-5
+ */
+ unsigned char mask[4];
+
+ /* data points to the place where the message is stored when passed to
+ * the websocket_data callback. This is either mem on the stack, or a
+ * dynamically allocated buffer if it is too large. */
+ unsigned char mem[4096];
+ unsigned char mop; /* mask flag and opcode */
+
+ /* Variables used for connection monitoring */
+ double timeout = -1.0;
+ int enable_ping_pong = 0;
+ int ping_count = 0;
+
+ if (conn->dom_ctx->config[ENABLE_WEBSOCKET_PING_PONG]) {
+ enable_ping_pong =
+ !mg_strcasecmp(conn->dom_ctx->config[ENABLE_WEBSOCKET_PING_PONG],
+ "yes");
+ }
+
+ if (conn->dom_ctx->config[WEBSOCKET_TIMEOUT]) {
+ timeout = atoi(conn->dom_ctx->config[WEBSOCKET_TIMEOUT]) / 1000.0;
+ }
+ if ((timeout <= 0.0) && (conn->dom_ctx->config[REQUEST_TIMEOUT])) {
+ timeout = atoi(conn->dom_ctx->config[REQUEST_TIMEOUT]) / 1000.0;
+ }
+ if (timeout <= 0.0) {
+ timeout = atof(config_options[REQUEST_TIMEOUT].default_value) / 1000.0;
+ }
+
+ /* Enter data processing loop */
+ DEBUG_TRACE("Websocket connection %s:%u start data processing loop",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ conn->in_websocket_handling = 1;
+ mg_set_thread_name("wsock");
+
+ /* Loop continuously, reading messages from the socket, invoking the
+ * callback, and waiting repeatedly until an error occurs. */
+ while (STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)
+ && (!conn->must_close)) {
+ header_len = 0;
+ DEBUG_ASSERT(conn->data_len >= conn->request_len);
+ if ((body_len = (size_t)(conn->data_len - conn->request_len)) >= 2) {
+ len = buf[1] & 127;
+ mask_len = (buf[1] & 128) ? 4 : 0;
+ if ((len < 126) && (body_len >= mask_len)) {
+ /* inline 7-bit length field */
+ data_len = len;
+ header_len = 2 + mask_len;
+ } else if ((len == 126) && (body_len >= (4 + mask_len))) {
+ /* 16-bit length field */
+ header_len = 4 + mask_len;
+ data_len = ((((size_t)buf[2]) << 8) + buf[3]);
+ } else if (body_len >= (10 + mask_len)) {
+ /* 64-bit length field */
+ uint32_t l1, l2;
+ memcpy(&l1, &buf[2], 4); /* Use memcpy for alignment */
+ memcpy(&l2, &buf[6], 4);
+ header_len = 10 + mask_len;
+ data_len = (((uint64_t)ntohl(l1)) << 32) + ntohl(l2);
+
+ if (data_len > (uint64_t)0x7FFF0000ul) {
+ /* no can do */
+ mg_cry_internal(
+ conn,
+ "%s",
+ "websocket out of memory; closing connection");
+ break;
+ }
+ }
+ }
+
+ if ((header_len > 0) && (body_len >= header_len)) {
+ /* Allocate space to hold websocket payload */
+ unsigned char *data = mem;
+
+ if ((size_t)data_len > (size_t)sizeof(mem)) {
+ data = (unsigned char *)mg_malloc_ctx((size_t)data_len,
+ conn->phys_ctx);
+ if (data == NULL) {
+ /* Allocation failed, exit the loop and then close the
+ * connection */
+ mg_cry_internal(
+ conn,
+ "%s",
+ "websocket out of memory; closing connection");
+ break;
+ }
+ }
+
+ /* Copy the mask before we shift the queue and destroy it */
+ if (mask_len > 0) {
+ memcpy(mask, buf + header_len - mask_len, sizeof(mask));
+ } else {
+ memset(mask, 0, sizeof(mask));
+ }
+
+ /* Read frame payload from the first message in the queue into
+ * data and advance the queue by moving the memory in place. */
+ DEBUG_ASSERT(body_len >= header_len);
+ if (data_len + (uint64_t)header_len > (uint64_t)body_len) {
+ mop = buf[0]; /* current mask and opcode */
+ /* Overflow case */
+ len = body_len - header_len;
+ memcpy(data, buf + header_len, len);
+ error = 0;
+ while ((uint64_t)len < data_len) {
+ n = pull_inner(NULL,
+ conn,
+ (char *)(data + len),
+ (int)(data_len - len),
+ timeout);
+ if (n <= -2) {
+ error = 1;
+ break;
+ } else if (n > 0) {
+ len += (size_t)n;
+ } else {
+ /* Timeout: should retry */
+ /* TODO: retry condition */
+ }
+ }
+ if (error) {
+ mg_cry_internal(
+ conn,
+ "%s",
+ "Websocket pull failed; closing connection");
+ if (data != mem) {
+ mg_free(data);
+ }
+ break;
+ }
+
+ conn->data_len = conn->request_len;
+
+ } else {
+
+ mop = buf[0]; /* current mask and opcode, overwritten by
+ * memmove() */
+
+ /* Length of the message being read at the front of the
+ * queue. Cast to 31 bit is OK, since we limited
+ * data_len before. */
+ len = (size_t)data_len + header_len;
+
+ /* Copy the data payload into the data pointer for the
+ * callback. Cast to 31 bit is OK, since we
+ * limited data_len */
+ memcpy(data, buf + header_len, (size_t)data_len);
+
+ /* Move the queue forward len bytes */
+ memmove(buf, buf + len, body_len - len);
+
+ /* Mark the queue as advanced */
+ conn->data_len -= (int)len;
+ }
+
+ /* Apply mask if necessary */
+ if (mask_len > 0) {
+ for (i = 0; i < (size_t)data_len; i++) {
+ data[i] ^= mask[i & 3];
+ }
+ }
+
+ exit_by_callback = 0;
+ if (enable_ping_pong && ((mop & 0xF) == MG_WEBSOCKET_OPCODE_PONG)) {
+ /* filter PONG messages */
+ DEBUG_TRACE("PONG from %s:%u",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ /* No unanwered PINGs left */
+ ping_count = 0;
+ } else if (enable_ping_pong
+ && ((mop & 0xF) == MG_WEBSOCKET_OPCODE_PING)) {
+ /* reply PING messages */
+ DEBUG_TRACE("Reply PING from %s:%u",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ ret = mg_websocket_write(conn,
+ MG_WEBSOCKET_OPCODE_PONG,
+ (char *)data,
+ (size_t)data_len);
+ if (ret <= 0) {
+ /* Error: send failed */
+ DEBUG_TRACE("Reply PONG failed (%i)", ret);
+ break;
+ }
+
+ } else {
+ /* Exit the loop if callback signals to exit (server side),
+ * or "connection close" opcode received (client side). */
+ if (ws_data_handler != NULL) {
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ if (mop & 0x40) {
+ /* Inflate the data received if bit RSV1 is set. */
+ if (!conn->websocket_deflate_initialized) {
+ if (websocket_deflate_initialize(conn, 1) != Z_OK)
+ exit_by_callback = 1;
+ }
+ if (!exit_by_callback) {
+ size_t inflate_buf_size_old = 0;
+ size_t inflate_buf_size =
+ data_len
+ * 4; // Initial guess of the inflated message
+ // size. We double the memory when needed.
+ Bytef *inflated = NULL;
+ Bytef *new_mem = NULL;
+ conn->websocket_inflate_state.avail_in =
+ (uInt)(data_len + 4);
+ conn->websocket_inflate_state.next_in = data;
+ // Add trailing 0x00 0x00 0xff 0xff bytes
+ data[data_len] = '\x00';
+ data[data_len + 1] = '\x00';
+ data[data_len + 2] = '\xff';
+ data[data_len + 3] = '\xff';
+ do {
+ if (inflate_buf_size_old == 0) {
+ new_mem =
+ (Bytef *)mg_calloc(inflate_buf_size,
+ sizeof(Bytef));
+ } else {
+ inflate_buf_size *= 2;
+ new_mem =
+ (Bytef *)mg_realloc(inflated,
+ inflate_buf_size);
+ }
+ if (new_mem == NULL) {
+ mg_cry_internal(
+ conn,
+ "Out of memory: Cannot allocate "
+ "inflate buffer of %lu bytes",
+ (unsigned long)inflate_buf_size);
+ exit_by_callback = 1;
+ break;
+ }
+ inflated = new_mem;
+ conn->websocket_inflate_state.avail_out =
+ (uInt)(inflate_buf_size
+ - inflate_buf_size_old);
+ conn->websocket_inflate_state.next_out =
+ inflated + inflate_buf_size_old;
+ ret = inflate(&conn->websocket_inflate_state,
+ Z_SYNC_FLUSH);
+ if (ret == Z_NEED_DICT || ret == Z_DATA_ERROR
+ || ret == Z_MEM_ERROR) {
+ mg_cry_internal(
+ conn,
+ "ZLIB inflate error: %i %s",
+ ret,
+ (conn->websocket_inflate_state.msg
+ ? conn->websocket_inflate_state.msg
+ : "<no error message>"));
+ exit_by_callback = 1;
+ break;
+ }
+ inflate_buf_size_old = inflate_buf_size;
+
+ } while (conn->websocket_inflate_state.avail_out
+ == 0);
+ inflate_buf_size -=
+ conn->websocket_inflate_state.avail_out;
+ if (!ws_data_handler(conn,
+ mop,
+ (char *)inflated,
+ inflate_buf_size,
+ callback_data)) {
+ exit_by_callback = 1;
+ }
+ mg_free(inflated);
+ }
+ } else
+#endif
+ if (!ws_data_handler(conn,
+ mop,
+ (char *)data,
+ (size_t)data_len,
+ callback_data)) {
+ exit_by_callback = 1;
+ }
+ }
+ }
+
+ /* It a buffer has been allocated, free it again */
+ if (data != mem) {
+ mg_free(data);
+ }
+
+ if (exit_by_callback) {
+ DEBUG_TRACE("Callback requests to close connection from %s:%u",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ break;
+ }
+ if ((mop & 0xf) == MG_WEBSOCKET_OPCODE_CONNECTION_CLOSE) {
+ /* Opcode == 8, connection close */
+ DEBUG_TRACE("Message requests to close connection from %s:%u",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ break;
+ }
+
+ /* Not breaking the loop, process next websocket frame. */
+ } else {
+ /* Read from the socket into the next available location in the
+ * message queue. */
+ n = pull_inner(NULL,
+ conn,
+ conn->buf + conn->data_len,
+ conn->buf_size - conn->data_len,
+ timeout);
+ if (n <= -2) {
+ /* Error, no bytes read */
+ DEBUG_TRACE("PULL from %s:%u failed",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ break;
+ }
+ if (n > 0) {
+ conn->data_len += n;
+ /* Reset open PING count */
+ ping_count = 0;
+ } else {
+ if (STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)
+ && (!conn->must_close)) {
+ if (ping_count > MG_MAX_UNANSWERED_PING) {
+ /* Stop sending PING */
+ DEBUG_TRACE("Too many (%i) unanswered ping from %s:%u "
+ "- closing connection",
+ ping_count,
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ break;
+ }
+ if (enable_ping_pong) {
+ /* Send Websocket PING message */
+ DEBUG_TRACE("PING to %s:%u",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+ ret = mg_websocket_write(conn,
+ MG_WEBSOCKET_OPCODE_PING,
+ NULL,
+ 0);
+
+ if (ret <= 0) {
+ /* Error: send failed */
+ DEBUG_TRACE("Send PING failed (%i)", ret);
+ break;
+ }
+ ping_count++;
+ }
+ }
+ /* Timeout: should retry */
+ /* TODO: get timeout def */
+ }
+ }
+ }
+
+ /* Leave data processing loop */
+ mg_set_thread_name("worker");
+ conn->in_websocket_handling = 0;
+ DEBUG_TRACE("Websocket connection %s:%u left data processing loop",
+ conn->request_info.remote_addr,
+ conn->request_info.remote_port);
+}
+
+
+static int
+mg_websocket_write_exec(struct mg_connection *conn,
+ int opcode,
+ const char *data,
+ size_t dataLen,
+ uint32_t masking_key)
+{
+ unsigned char header[14];
+ size_t headerLen;
+ int retval;
+
+#if defined(GCC_DIAGNOSTIC)
+ /* Disable spurious conversion warning for GCC */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+ /* Note that POSIX/Winsock's send() is threadsafe
+ * http://stackoverflow.com/questions/1981372/are-parallel-calls-to-send-recv-on-the-same-socket-valid
+ * but mongoose's mg_printf/mg_write is not (because of the loop in
+ * push(), although that is only a problem if the packet is large or
+ * outgoing buffer is full). */
+
+ /* TODO: Check if this lock should be moved to user land.
+ * Currently the server sets this lock for websockets, but
+ * not for any other connection. It must be set for every
+ * conn read/written by more than one thread, no matter if
+ * it is a websocket or regular connection. */
+ (void)mg_lock_connection(conn);
+
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ size_t deflated_size = 0;
+ Bytef *deflated = 0;
+ // Deflate websocket messages over 100kb
+ int use_deflate = dataLen > 100 * 1024 && conn->accept_gzip;
+
+ if (use_deflate) {
+ if (!conn->websocket_deflate_initialized) {
+ if (websocket_deflate_initialize(conn, 1) != Z_OK)
+ return 0;
+ }
+
+ // Deflating the message
+ header[0] = 0xC0u | (unsigned char)((unsigned)opcode & 0xf);
+ conn->websocket_deflate_state.avail_in = (uInt)dataLen;
+ conn->websocket_deflate_state.next_in = (unsigned char *)data;
+ deflated_size = (size_t)compressBound((uLong)dataLen);
+ deflated = mg_calloc(deflated_size, sizeof(Bytef));
+ if (deflated == NULL) {
+ mg_cry_internal(
+ conn,
+ "Out of memory: Cannot allocate deflate buffer of %lu bytes",
+ (unsigned long)deflated_size);
+ mg_unlock_connection(conn);
+ return -1;
+ }
+ conn->websocket_deflate_state.avail_out = (uInt)deflated_size;
+ conn->websocket_deflate_state.next_out = deflated;
+ deflate(&conn->websocket_deflate_state, conn->websocket_deflate_flush);
+ dataLen = deflated_size - conn->websocket_deflate_state.avail_out
+ - 4; // Strip trailing 0x00 0x00 0xff 0xff bytes
+ } else
+#endif
+ header[0] = 0x80u | (unsigned char)((unsigned)opcode & 0xf);
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif
+
+ /* Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 */
+ if (dataLen < 126) {
+ /* inline 7-bit length field */
+ header[1] = (unsigned char)dataLen;
+ headerLen = 2;
+ } else if (dataLen <= 0xFFFF) {
+ /* 16-bit length field */
+ uint16_t len = htons((uint16_t)dataLen);
+ header[1] = 126;
+ memcpy(header + 2, &len, 2);
+ headerLen = 4;
+ } else {
+ /* 64-bit length field */
+ uint32_t len1 = htonl((uint32_t)((uint64_t)dataLen >> 32));
+ uint32_t len2 = htonl((uint32_t)(dataLen & 0xFFFFFFFFu));
+ header[1] = 127;
+ memcpy(header + 2, &len1, 4);
+ memcpy(header + 6, &len2, 4);
+ headerLen = 10;
+ }
+
+ if (masking_key) {
+ /* add mask */
+ header[1] |= 0x80;
+ memcpy(header + headerLen, &masking_key, 4);
+ headerLen += 4;
+ }
+
+ retval = mg_write(conn, header, headerLen);
+ if (retval != (int)headerLen) {
+ /* Did not send complete header */
+ retval = -1;
+ } else {
+ if (dataLen > 0) {
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ if (use_deflate) {
+ retval = mg_write(conn, deflated, dataLen);
+ mg_free(deflated);
+ } else
+#endif
+ retval = mg_write(conn, data, dataLen);
+ }
+ /* if dataLen == 0, the header length (2) is returned */
+ }
+
+ /* TODO: Remove this unlock as well, when lock is removed. */
+ mg_unlock_connection(conn);
+
+ return retval;
+}
+
+
+CIVETWEB_API int
+mg_websocket_write(struct mg_connection *conn,
+ int opcode,
+ const char *data,
+ size_t dataLen)
+{
+ return mg_websocket_write_exec(conn, opcode, data, dataLen, 0);
+}
+
+
+static void
+mask_data(const char *in, size_t in_len, uint32_t masking_key, char *out)
+{
+ size_t i = 0;
+
+ i = 0;
+ if ((in_len > 3) && ((ptrdiff_t)in % 4) == 0) {
+ /* Convert in 32 bit words, if data is 4 byte aligned */
+ while (i < (in_len - 3)) {
+ *(uint32_t *)(void *)(out + i) =
+ *(uint32_t *)(void *)(in + i) ^ masking_key;
+ i += 4;
+ }
+ }
+ if (i != in_len) {
+ /* convert 1-3 remaining bytes if ((dataLen % 4) != 0)*/
+ while (i < in_len) {
+ *(uint8_t *)(void *)(out + i) =
+ *(uint8_t *)(void *)(in + i)
+ ^ *(((uint8_t *)&masking_key) + (i % 4));
+ i++;
+ }
+ }
+}
+
+
+CIVETWEB_API int
+mg_websocket_client_write(struct mg_connection *conn,
+ int opcode,
+ const char *data,
+ size_t dataLen)
+{
+ int retval = -1;
+ char *masked_data =
+ (char *)mg_malloc_ctx(((dataLen + 7) / 4) * 4, conn->phys_ctx);
+ uint32_t masking_key = 0;
+
+ if (masked_data == NULL) {
+ /* Return -1 in an error case */
+ mg_cry_internal(conn,
+ "%s",
+ "Cannot allocate buffer for masked websocket response: "
+ "Out of memory");
+ return -1;
+ }
+
+ do {
+ /* Get a masking key - but not 0 */
+ masking_key = (uint32_t)get_random();
+ } while (masking_key == 0);
+
+ mask_data(data, dataLen, masking_key, masked_data);
+
+ retval = mg_websocket_write_exec(
+ conn, opcode, masked_data, dataLen, masking_key);
+ mg_free(masked_data);
+
+ return retval;
+}
+
+
+static void
+handle_websocket_request(struct mg_connection *conn,
+ const char *path,
+ int is_callback_resource,
+ struct mg_websocket_subprotocols *subprotocols,
+ mg_websocket_connect_handler ws_connect_handler,
+ mg_websocket_ready_handler ws_ready_handler,
+ mg_websocket_data_handler ws_data_handler,
+ mg_websocket_close_handler ws_close_handler,
+ void *cbData)
+{
+ const char *websock_key = mg_get_header(conn, "Sec-WebSocket-Key");
+ const char *version = mg_get_header(conn, "Sec-WebSocket-Version");
+ ptrdiff_t lua_websock = 0;
+
+#if !defined(USE_LUA)
+ (void)path;
+#endif
+
+ /* Step 1: Check websocket protocol version. */
+ /* Step 1.1: Check Sec-WebSocket-Key. */
+ if (!websock_key) {
+ /* The RFC standard version (https://tools.ietf.org/html/rfc6455)
+ * requires a Sec-WebSocket-Key header.
+ */
+ /* It could be the hixie draft version
+ * (http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol-76).
+ */
+ const char *key1 = mg_get_header(conn, "Sec-WebSocket-Key1");
+ const char *key2 = mg_get_header(conn, "Sec-WebSocket-Key2");
+ char key3[8];
+
+ if ((key1 != NULL) && (key2 != NULL)) {
+ /* This version uses 8 byte body data in a GET request */
+ conn->content_len = 8;
+ if (8 == mg_read(conn, key3, 8)) {
+ /* This is the hixie version */
+ mg_send_http_error(conn,
+ 426,
+ "%s",
+ "Protocol upgrade to RFC 6455 required");
+ return;
+ }
+ }
+ /* This is an unknown version */
+ mg_send_http_error(conn, 400, "%s", "Malformed websocket request");
+ return;
+ }
+
+ /* Step 1.2: Check websocket protocol version. */
+ /* The RFC version (https://tools.ietf.org/html/rfc6455) is 13. */
+ if ((version == NULL) || (strcmp(version, "13") != 0)) {
+ /* Reject wrong versions */
+ mg_send_http_error(conn, 426, "%s", "Protocol upgrade required");
+ return;
+ }
+
+ /* Step 1.3: Could check for "Host", but we do not really need this
+ * value for anything, so just ignore it. */
+
+ /* Step 2: If a callback is responsible, call it. */
+ if (is_callback_resource) {
+ /* Step 2.1 check and select subprotocol */
+ const char *protocols[64]; // max 64 headers
+ int nbSubprotocolHeader = get_req_headers(&conn->request_info,
+ "Sec-WebSocket-Protocol",
+ protocols,
+ 64);
+
+ if ((nbSubprotocolHeader > 0) && subprotocols) {
+
+ int headerNo, idx;
+ size_t len;
+ const char *sep, *curSubProtocol,
+ *acceptedWebSocketSubprotocol = NULL;
+
+ /* look for matching subprotocol */
+ for (headerNo = 0; headerNo < nbSubprotocolHeader; headerNo++) {
+ /* There might be multiple headers ... */
+ const char *protocol = protocols[headerNo];
+ curSubProtocol = protocol;
+
+ /* ... and in every header there might be a , separated list */
+ while (!acceptedWebSocketSubprotocol && (*curSubProtocol)) {
+
+ while ((*curSubProtocol == ' ') || (*curSubProtocol == ','))
+ curSubProtocol++;
+ sep = strchr(curSubProtocol, ',');
+ if (sep) {
+ len = (size_t)(sep - curSubProtocol);
+ } else {
+ len = strlen(curSubProtocol);
+ }
+
+ for (idx = 0; idx < subprotocols->nb_subprotocols; idx++) {
+ // COMPARE: curSubProtocol ==
+ // subprotocols->subprotocols[idx]
+ if ((strlen(subprotocols->subprotocols[idx]) == len)
+ && (strncmp(curSubProtocol,
+ subprotocols->subprotocols[idx],
+ len)
+ == 0)) {
+ acceptedWebSocketSubprotocol =
+ subprotocols->subprotocols[idx];
+ break;
+ }
+ }
+ curSubProtocol += len;
+ }
+ }
+
+ conn->request_info.acceptedWebSocketSubprotocol =
+ acceptedWebSocketSubprotocol;
+ }
+
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ websocket_deflate_negotiate(conn);
+#endif
+
+ if ((ws_connect_handler != NULL)
+ && (ws_connect_handler(conn, cbData) != 0)) {
+ /* C callback has returned non-zero, do not proceed with
+ * handshake.
+ */
+ /* Note that C callbacks are no longer called when Lua is
+ * responsible, so C can no longer filter callbacks for Lua. */
+ return;
+ }
+ }
+
+#if defined(USE_LUA)
+ /* Step 3: No callback. Check if Lua is responsible. */
+ else {
+ /* Step 3.1: Check if Lua is responsible. */
+ if (conn->dom_ctx->config[LUA_WEBSOCKET_EXTENSIONS]) {
+ lua_websock = match_prefix_strlen(
+ conn->dom_ctx->config[LUA_WEBSOCKET_EXTENSIONS], path);
+ }
+
+ if (lua_websock > 0) {
+ /* Step 3.2: Lua is responsible: call it. */
+ conn->lua_websocket_state = lua_websocket_new(path, conn);
+ if (!conn->lua_websocket_state) {
+ /* Lua rejected the new client */
+ return;
+ }
+ }
+ }
+#endif
+
+ /* Step 4: Check if there is a responsible websocket handler. */
+ if (!is_callback_resource && !lua_websock) {
+ /* There is no callback, and Lua is not responsible either. */
+ /* Reply with a 404 Not Found. We are still at a standard
+ * HTTP request here, before the websocket handshake, so
+ * we can still send standard HTTP error replies. */
+ mg_send_http_error(conn, 404, "%s", "Not found");
+ return;
+ }
+
+ /* Step 5: The websocket connection has been accepted */
+ if (!send_websocket_handshake(conn, websock_key)) {
+ mg_send_http_error(conn, 500, "%s", "Websocket handshake failed");
+ return;
+ }
+
+ /* Step 6: Call the ready handler */
+ if (is_callback_resource) {
+ if (ws_ready_handler != NULL) {
+ ws_ready_handler(conn, cbData);
+ }
+#if defined(USE_LUA)
+ } else if (lua_websock) {
+ if (!lua_websocket_ready(conn, conn->lua_websocket_state)) {
+ /* the ready handler returned false */
+ return;
+ }
+#endif
+ }
+
+ /* Step 7: Enter the read loop */
+ if (is_callback_resource) {
+ read_websocket(conn, ws_data_handler, cbData);
+#if defined(USE_LUA)
+ } else if (lua_websock) {
+ read_websocket(conn, lua_websocket_data, conn->lua_websocket_state);
+#endif
+ }
+
+#if defined(USE_ZLIB) && defined(MG_EXPERIMENTAL_INTERFACES)
+ /* Step 8: Close the deflate & inflate buffers */
+ if (conn->websocket_deflate_initialized) {
+ deflateEnd(&conn->websocket_deflate_state);
+ inflateEnd(&conn->websocket_inflate_state);
+ }
+#endif
+
+ /* Step 9: Call the close handler */
+ if (ws_close_handler) {
+ ws_close_handler(conn, cbData);
+ }
+}
+#endif /* !USE_WEBSOCKET */
+
+
+/* Is upgrade request:
+ * 0 = regular HTTP/1.0 or HTTP/1.1 request
+ * 1 = upgrade to websocket
+ * 2 = upgrade to HTTP/2
+ * -1 = upgrade to unknown protocol
+ */
+static int
+should_switch_to_protocol(const struct mg_connection *conn)
+{
+ const char *connection_headers[8];
+ const char *upgrade_to;
+ int connection_header_count, i, should_upgrade;
+
+ /* A websocket protocol has the following HTTP headers:
+ *
+ * Connection: Upgrade
+ * Upgrade: Websocket
+ *
+ * It seems some clients use multiple headers:
+ * see https://github.com/civetweb/civetweb/issues/1083
+ */
+ connection_header_count = get_req_headers(&conn->request_info,
+ "Connection",
+ connection_headers,
+ 8);
+ should_upgrade = 0;
+ for (i = 0; i < connection_header_count; i++) {
+ if (0 != mg_strcasestr(connection_headers[i], "upgrade")) {
+ should_upgrade = 1;
+ }
+ }
+ if (!should_upgrade) {
+ return PROTOCOL_TYPE_HTTP1;
+ }
+
+ upgrade_to = mg_get_header(conn, "Upgrade");
+ if (upgrade_to == NULL) {
+ /* "Connection: Upgrade" without "Upgrade" Header --> Error */
+ return -1;
+ }
+
+ /* Upgrade to ... */
+ if (0 != mg_strcasestr(upgrade_to, "websocket")) {
+ /* The headers "Host", "Sec-WebSocket-Key", "Sec-WebSocket-Protocol" and
+ * "Sec-WebSocket-Version" are also required.
+ * Don't check them here, since even an unsupported websocket protocol
+ * request still IS a websocket request (in contrast to a standard HTTP
+ * request). It will fail later in handle_websocket_request.
+ */
+ return PROTOCOL_TYPE_WEBSOCKET; /* Websocket */
+ }
+ if (0 != mg_strcasestr(upgrade_to, "h2")) {
+ return PROTOCOL_TYPE_HTTP2; /* Websocket */
+ }
+
+ /* Upgrade to another protocol */
+ return -1;
+}
+
+
+static int
+parse_match_net(const struct vec *vec, const union usa *sa, int no_strict)
+{
+ int n;
+ unsigned int a, b, c, d, slash;
+
+ if (sscanf(vec->ptr, "%u.%u.%u.%u/%u%n", &a, &b, &c, &d, &slash, &n)
+ != 5) { // NOLINT(cert-err34-c) 'sscanf' used to convert a string to an
+ // integer value, but function will not report conversion
+ // errors; consider using 'strtol' instead
+ slash = 32;
+ if (sscanf(vec->ptr, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n)
+ != 4) { // NOLINT(cert-err34-c) 'sscanf' used to convert a string to
+ // an integer value, but function will not report conversion
+ // errors; consider using 'strtol' instead
+ n = 0;
+ }
+ }
+
+ if ((n > 0) && ((size_t)n == vec->len)) {
+ if ((a < 256) && (b < 256) && (c < 256) && (d < 256) && (slash < 33)) {
+ /* IPv4 format */
+ if (sa->sa.sa_family == AF_INET) {
+ uint32_t ip = ntohl(sa->sin.sin_addr.s_addr);
+ uint32_t net = ((uint32_t)a << 24) | ((uint32_t)b << 16)
+ | ((uint32_t)c << 8) | (uint32_t)d;
+ uint32_t mask = slash ? (0xFFFFFFFFu << (32 - slash)) : 0;
+ return (ip & mask) == net;
+ }
+ return 0;
+ }
+ }
+#if defined(USE_IPV6)
+ else {
+ char ad[50];
+ const char *p;
+
+ if (sscanf(vec->ptr, "[%49[^]]]/%u%n", ad, &slash, &n) != 2) {
+ slash = 128;
+ if (sscanf(vec->ptr, "[%49[^]]]%n", ad, &n) != 1) {
+ n = 0;
+ }
+ }
+
+ if ((n <= 0) && no_strict) {
+ /* no square brackets? */
+ p = strchr(vec->ptr, '/');
+ if (p && (p < (vec->ptr + vec->len))) {
+ if (((size_t)(p - vec->ptr) < sizeof(ad))
+ && (sscanf(p, "/%u%n", &slash, &n) == 1)) {
+ n += (int)(p - vec->ptr);
+ mg_strlcpy(ad, vec->ptr, (size_t)(p - vec->ptr) + 1);
+ } else {
+ n = 0;
+ }
+ } else if (vec->len < sizeof(ad)) {
+ n = (int)vec->len;
+ slash = 128;
+ mg_strlcpy(ad, vec->ptr, vec->len + 1);
+ }
+ }
+
+ if ((n > 0) && ((size_t)n == vec->len) && (slash < 129)) {
+ p = ad;
+ c = 0;
+ /* zone indexes are unsupported, at least two colons are needed */
+ while (isxdigit((unsigned char)*p) || (*p == '.') || (*p == ':')) {
+ if (*(p++) == ':') {
+ c++;
+ }
+ }
+ if ((*p == '\0') && (c >= 2)) {
+ struct sockaddr_in6 sin6;
+ unsigned int i;
+
+ /* for strict validation, an actual IPv6 argument is needed */
+ if (sa->sa.sa_family != AF_INET6) {
+ return 0;
+ }
+ if (mg_inet_pton(AF_INET6, ad, &sin6, sizeof(sin6), 0)) {
+ /* IPv6 format */
+ for (i = 0; i < 16; i++) {
+ uint8_t ip = sa->sin6.sin6_addr.s6_addr[i];
+ uint8_t net = sin6.sin6_addr.s6_addr[i];
+ uint8_t mask = 0;
+
+ if (8 * i + 8 < slash) {
+ mask = 0xFFu;
+ } else if (8 * i < slash) {
+ mask = (uint8_t)(0xFFu << (8 * i + 8 - slash));
+ }
+ if ((ip & mask) != net) {
+ return 0;
+ }
+ }
+ return 1;
+ }
+ }
+ }
+ }
+#else
+ (void)no_strict;
+#endif
+
+ /* malformed */
+ return -1;
+}
+
+
+static int
+set_throttle(const char *spec, const union usa *rsa, const char *uri)
+{
+ int throttle = 0;
+ struct vec vec, val;
+ char mult;
+ double v;
+
+ while ((spec = next_option(spec, &vec, &val)) != NULL) {
+ mult = ',';
+ if ((val.ptr == NULL)
+ || (sscanf(val.ptr, "%lf%c", &v, &mult)
+ < 1) // NOLINT(cert-err34-c) 'sscanf' used to convert a string
+ // to an integer value, but function will not report
+ // conversion errors; consider using 'strtol' instead
+ || (v < 0)
+ || ((lowercase(&mult) != 'k') && (lowercase(&mult) != 'm')
+ && (mult != ','))) {
+ continue;
+ }
+ v *= (lowercase(&mult) == 'k')
+ ? 1024
+ : ((lowercase(&mult) == 'm') ? 1048576 : 1);
+ if (vec.len == 1 && vec.ptr[0] == '*') {
+ throttle = (int)v;
+ } else {
+ int matched = parse_match_net(&vec, rsa, 0);
+ if (matched >= 0) {
+ /* a valid IP subnet */
+ if (matched) {
+ throttle = (int)v;
+ }
+ } else if (match_prefix(vec.ptr, vec.len, uri) > 0) {
+ throttle = (int)v;
+ }
+ }
+ }
+
+ return throttle;
+}
+
+
+/* The mg_upload function is superseded by mg_handle_form_request. */
+#include "handle_form.inl"
+
+
+static int
+get_first_ssl_listener_index(const struct mg_context *ctx)
+{
+ unsigned int i;
+ int idx = -1;
+ if (ctx) {
+ for (i = 0; ((idx == -1) && (i < ctx->num_listening_sockets)); i++) {
+ idx = ctx->listening_sockets[i].is_ssl ? ((int)(i)) : -1;
+ }
+ }
+ return idx;
+}
+
+
+/* Return host (without port) */
+static void
+get_host_from_request_info(struct vec *host, const struct mg_request_info *ri)
+{
+ const char *host_header =
+ get_header(ri->http_headers, ri->num_headers, "Host");
+
+ host->ptr = NULL;
+ host->len = 0;
+
+ if (host_header != NULL) {
+ const char *pos;
+
+ /* If the "Host" is an IPv6 address, like [::1], parse until ]
+ * is found. */
+ if (*host_header == '[') {
+ pos = strchr(host_header, ']');
+ if (!pos) {
+ /* Malformed hostname starts with '[', but no ']' found */
+ DEBUG_TRACE("%s", "Host name format error '[' without ']'");
+ return;
+ }
+ /* terminate after ']' */
+ host->ptr = host_header;
+ host->len = (size_t)(pos + 1 - host_header);
+ } else {
+ /* Otherwise, a ':' separates hostname and port number */
+ pos = strchr(host_header, ':');
+ if (pos != NULL) {
+ host->len = (size_t)(pos - host_header);
+ } else {
+ host->len = strlen(host_header);
+ }
+ host->ptr = host_header;
+ }
+ }
+}
+
+
+static int
+switch_domain_context(struct mg_connection *conn)
+{
+ struct vec host;
+
+ get_host_from_request_info(&host, &conn->request_info);
+
+ if (host.ptr) {
+ if (conn->ssl) {
+ /* This is a HTTPS connection, maybe we have a hostname
+ * from SNI (set in ssl_servername_callback). */
+ const char *sslhost = conn->dom_ctx->config[AUTHENTICATION_DOMAIN];
+ if (sslhost && (conn->dom_ctx != &(conn->phys_ctx->dd))) {
+ /* We are not using the default domain */
+ if ((strlen(sslhost) != host.len)
+ || mg_strncasecmp(host.ptr, sslhost, host.len)) {
+ /* Mismatch between SNI domain and HTTP domain */
+ DEBUG_TRACE("Host mismatch: SNI: %s, HTTPS: %.*s",
+ sslhost,
+ (int)host.len,
+ host.ptr);
+ return 0;
+ }
+ }
+
+ } else {
+ struct mg_domain_context *dom = &(conn->phys_ctx->dd);
+ while (dom) {
+ const char *domName = dom->config[AUTHENTICATION_DOMAIN];
+ size_t domNameLen = strlen(domName);
+ if ((domNameLen == host.len)
+ && !mg_strncasecmp(host.ptr, domName, host.len)) {
+
+ /* Found matching domain */
+ DEBUG_TRACE("HTTP domain %s found",
+ dom->config[AUTHENTICATION_DOMAIN]);
+
+ /* TODO: Check if this is a HTTP or HTTPS domain */
+ conn->dom_ctx = dom;
+ break;
+ }
+ mg_lock_context(conn->phys_ctx);
+ dom = dom->next;
+ mg_unlock_context(conn->phys_ctx);
+ }
+ }
+
+ DEBUG_TRACE("HTTP%s Host: %.*s",
+ conn->ssl ? "S" : "",
+ (int)host.len,
+ host.ptr);
+
+ } else {
+ DEBUG_TRACE("HTTP%s Host is not set", conn->ssl ? "S" : "");
+ return 1;
+ }
+
+ return 1;
+}
+
+
+static void
+redirect_to_https_port(struct mg_connection *conn, int port)
+{
+ char target_url[MG_BUF_LEN];
+ int truncated = 0;
+ const char *expect_proto =
+ (conn->protocol_type == PROTOCOL_TYPE_WEBSOCKET) ? "wss" : "https";
+
+ /* Use "308 Permanent Redirect" */
+ int redirect_code = 308;
+
+ /* In any case, close the current connection */
+ conn->must_close = 1;
+
+ /* Send host, port, uri and (if it exists) ?query_string */
+ if (mg_construct_local_link(
+ conn, target_url, sizeof(target_url), expect_proto, port, NULL)
+ < 0) {
+ truncated = 1;
+ } else if (conn->request_info.query_string != NULL) {
+ size_t slen1 = strlen(target_url);
+ size_t slen2 = strlen(conn->request_info.query_string);
+ if ((slen1 + slen2 + 2) < sizeof(target_url)) {
+ target_url[slen1] = '?';
+ memcpy(target_url + slen1 + 1,
+ conn->request_info.query_string,
+ slen2);
+ target_url[slen1 + slen2 + 1] = 0;
+ } else {
+ truncated = 1;
+ }
+ }
+
+ /* Check overflow in location buffer (will not occur if MG_BUF_LEN
+ * is used as buffer size) */
+ if (truncated) {
+ mg_send_http_error(conn, 500, "%s", "Redirect URL too long");
+ return;
+ }
+
+ /* Use redirect helper function */
+ mg_send_http_redirect(conn, target_url, redirect_code);
+}
+
+
+static void
+mg_set_handler_type(struct mg_context *phys_ctx,
+ struct mg_domain_context *dom_ctx,
+ const char *uri,
+ int handler_type,
+ int is_delete_request,
+ mg_request_handler handler,
+ struct mg_websocket_subprotocols *subprotocols,
+ mg_websocket_connect_handler connect_handler,
+ mg_websocket_ready_handler ready_handler,
+ mg_websocket_data_handler data_handler,
+ mg_websocket_close_handler close_handler,
+ mg_authorization_handler auth_handler,
+ void *cbdata)
+{
+ struct mg_handler_info *tmp_rh, **lastref;
+ size_t urilen = strlen(uri);
+
+ if (handler_type == WEBSOCKET_HANDLER) {
+ DEBUG_ASSERT(handler == NULL);
+ DEBUG_ASSERT(is_delete_request || connect_handler != NULL
+ || ready_handler != NULL || data_handler != NULL
+ || close_handler != NULL);
+
+ DEBUG_ASSERT(auth_handler == NULL);
+ if (handler != NULL) {
+ return;
+ }
+ if (!is_delete_request && (connect_handler == NULL)
+ && (ready_handler == NULL) && (data_handler == NULL)
+ && (close_handler == NULL)) {
+ return;
+ }
+ if (auth_handler != NULL) {
+ return;
+ }
+
+ } else if (handler_type == REQUEST_HANDLER) {
+ DEBUG_ASSERT(connect_handler == NULL && ready_handler == NULL
+ && data_handler == NULL && close_handler == NULL);
+ DEBUG_ASSERT(is_delete_request || (handler != NULL));
+ DEBUG_ASSERT(auth_handler == NULL);
+
+ if ((connect_handler != NULL) || (ready_handler != NULL)
+ || (data_handler != NULL) || (close_handler != NULL)) {
+ return;
+ }
+ if (!is_delete_request && (handler == NULL)) {
+ return;
+ }
+ if (auth_handler != NULL) {
+ return;
+ }
+
+ } else if (handler_type == AUTH_HANDLER) {
+ DEBUG_ASSERT(handler == NULL);
+ DEBUG_ASSERT(connect_handler == NULL && ready_handler == NULL
+ && data_handler == NULL && close_handler == NULL);
+ DEBUG_ASSERT(is_delete_request || (auth_handler != NULL));
+ if (handler != NULL) {
+ return;
+ }
+ if ((connect_handler != NULL) || (ready_handler != NULL)
+ || (data_handler != NULL) || (close_handler != NULL)) {
+ return;
+ }
+ if (!is_delete_request && (auth_handler == NULL)) {
+ return;
+ }
+ } else {
+ /* Unknown handler type. */
+ return;
+ }
+
+ if (!phys_ctx || !dom_ctx) {
+ /* no context available */
+ return;
+ }
+
+ mg_lock_context(phys_ctx);
+
+ /* first try to find an existing handler */
+ do {
+ lastref = &(dom_ctx->handlers);
+ for (tmp_rh = dom_ctx->handlers; tmp_rh != NULL;
+ tmp_rh = tmp_rh->next) {
+ if (tmp_rh->handler_type == handler_type
+ && (urilen == tmp_rh->uri_len) && !strcmp(tmp_rh->uri, uri)) {
+ if (!is_delete_request) {
+ /* update existing handler */
+ if (handler_type == REQUEST_HANDLER) {
+ /* Wait for end of use before updating */
+ if (tmp_rh->refcount) {
+ mg_unlock_context(phys_ctx);
+ mg_sleep(1);
+ mg_lock_context(phys_ctx);
+ /* tmp_rh might have been freed, search again. */
+ break;
+ }
+ /* Ok, the handler is no more use -> Update it */
+ tmp_rh->handler = handler;
+ } else if (handler_type == WEBSOCKET_HANDLER) {
+ tmp_rh->subprotocols = subprotocols;
+ tmp_rh->connect_handler = connect_handler;
+ tmp_rh->ready_handler = ready_handler;
+ tmp_rh->data_handler = data_handler;
+ tmp_rh->close_handler = close_handler;
+ } else { /* AUTH_HANDLER */
+ tmp_rh->auth_handler = auth_handler;
+ }
+ tmp_rh->cbdata = cbdata;
+ } else {
+ /* remove existing handler */
+ if (handler_type == REQUEST_HANDLER) {
+ /* Wait for end of use before removing */
+ if (tmp_rh->refcount) {
+ tmp_rh->removing = 1;
+ mg_unlock_context(phys_ctx);
+ mg_sleep(1);
+ mg_lock_context(phys_ctx);
+ /* tmp_rh might have been freed, search again. */
+ break;
+ }
+ /* Ok, the handler is no more used */
+ }
+ *lastref = tmp_rh->next;
+ mg_free(tmp_rh->uri);
+ mg_free(tmp_rh);
+ }
+ mg_unlock_context(phys_ctx);
+ return;
+ }
+ lastref = &(tmp_rh->next);
+ }
+ } while (tmp_rh != NULL);
+
+ if (is_delete_request) {
+ /* no handler to set, this was a remove request to a non-existing
+ * handler */
+ mg_unlock_context(phys_ctx);
+ return;
+ }
+
+ tmp_rh =
+ (struct mg_handler_info *)mg_calloc_ctx(1,
+ sizeof(struct mg_handler_info),
+ phys_ctx);
+ if (tmp_rh == NULL) {
+ mg_unlock_context(phys_ctx);
+ mg_cry_ctx_internal(phys_ctx,
+ "%s",
+ "Cannot create new request handler struct, OOM");
+ return;
+ }
+ tmp_rh->uri = mg_strdup_ctx(uri, phys_ctx);
+ if (!tmp_rh->uri) {
+ mg_unlock_context(phys_ctx);
+ mg_free(tmp_rh);
+ mg_cry_ctx_internal(phys_ctx,
+ "%s",
+ "Cannot create new request handler struct, OOM");
+ return;
+ }
+ tmp_rh->uri_len = urilen;
+ if (handler_type == REQUEST_HANDLER) {
+ tmp_rh->refcount = 0;
+ tmp_rh->removing = 0;
+ tmp_rh->handler = handler;
+ } else if (handler_type == WEBSOCKET_HANDLER) {
+ tmp_rh->subprotocols = subprotocols;
+ tmp_rh->connect_handler = connect_handler;
+ tmp_rh->ready_handler = ready_handler;
+ tmp_rh->data_handler = data_handler;
+ tmp_rh->close_handler = close_handler;
+ } else { /* AUTH_HANDLER */
+ tmp_rh->auth_handler = auth_handler;
+ }
+ tmp_rh->cbdata = cbdata;
+ tmp_rh->handler_type = handler_type;
+ tmp_rh->next = NULL;
+
+ *lastref = tmp_rh;
+ mg_unlock_context(phys_ctx);
+}
+
+
+CIVETWEB_API void
+mg_set_request_handler(struct mg_context *ctx,
+ const char *uri,
+ mg_request_handler handler,
+ void *cbdata)
+{
+ mg_set_handler_type(ctx,
+ &(ctx->dd),
+ uri,
+ REQUEST_HANDLER,
+ handler == NULL,
+ handler,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ cbdata);
+}
+
+
+CIVETWEB_API void
+mg_set_websocket_handler(struct mg_context *ctx,
+ const char *uri,
+ mg_websocket_connect_handler connect_handler,
+ mg_websocket_ready_handler ready_handler,
+ mg_websocket_data_handler data_handler,
+ mg_websocket_close_handler close_handler,
+ void *cbdata)
+{
+ mg_set_websocket_handler_with_subprotocols(ctx,
+ uri,
+ NULL,
+ connect_handler,
+ ready_handler,
+ data_handler,
+ close_handler,
+ cbdata);
+}
+
+
+CIVETWEB_API void
+mg_set_websocket_handler_with_subprotocols(
+ struct mg_context *ctx,
+ const char *uri,
+ struct mg_websocket_subprotocols *subprotocols,
+ mg_websocket_connect_handler connect_handler,
+ mg_websocket_ready_handler ready_handler,
+ mg_websocket_data_handler data_handler,
+ mg_websocket_close_handler close_handler,
+ void *cbdata)
+{
+ int is_delete_request = (connect_handler == NULL) && (ready_handler == NULL)
+ && (data_handler == NULL)
+ && (close_handler == NULL);
+ mg_set_handler_type(ctx,
+ &(ctx->dd),
+ uri,
+ WEBSOCKET_HANDLER,
+ is_delete_request,
+ NULL,
+ subprotocols,
+ connect_handler,
+ ready_handler,
+ data_handler,
+ close_handler,
+ NULL,
+ cbdata);
+}
+
+
+CIVETWEB_API void
+mg_set_auth_handler(struct mg_context *ctx,
+ const char *uri,
+ mg_authorization_handler handler,
+ void *cbdata)
+{
+ mg_set_handler_type(ctx,
+ &(ctx->dd),
+ uri,
+ AUTH_HANDLER,
+ handler == NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ handler,
+ cbdata);
+}
+
+
+static int
+get_request_handler(struct mg_connection *conn,
+ int handler_type,
+ mg_request_handler *handler,
+ struct mg_websocket_subprotocols **subprotocols,
+ mg_websocket_connect_handler *connect_handler,
+ mg_websocket_ready_handler *ready_handler,
+ mg_websocket_data_handler *data_handler,
+ mg_websocket_close_handler *close_handler,
+ mg_authorization_handler *auth_handler,
+ void **cbdata,
+ struct mg_handler_info **handler_info)
+{
+ const struct mg_request_info *request_info = mg_get_request_info(conn);
+ if (request_info) {
+ const char *uri = request_info->local_uri;
+ size_t urilen = strlen(uri);
+ struct mg_handler_info *tmp_rh;
+ int step, matched;
+
+ if (!conn || !conn->phys_ctx || !conn->dom_ctx) {
+ return 0;
+ }
+
+ mg_lock_context(conn->phys_ctx);
+
+ for (step = 0; step < 3; step++) {
+ for (tmp_rh = conn->dom_ctx->handlers; tmp_rh != NULL;
+ tmp_rh = tmp_rh->next) {
+ if (tmp_rh->handler_type != handler_type) {
+ continue;
+ }
+ if (step == 0) {
+ /* first try for an exact match */
+ matched = (tmp_rh->uri_len == urilen)
+ && (strcmp(tmp_rh->uri, uri) == 0);
+ } else if (step == 1) {
+ /* next try for a partial match, we will accept
+ uri/something */
+ matched =
+ (tmp_rh->uri_len < urilen)
+ && (uri[tmp_rh->uri_len] == '/')
+ && (memcmp(tmp_rh->uri, uri, tmp_rh->uri_len) == 0);
+ } else {
+ /* finally try for pattern match */
+ matched =
+ match_prefix(tmp_rh->uri, tmp_rh->uri_len, uri) > 0;
+ }
+ if (matched) {
+ if (handler_type == WEBSOCKET_HANDLER) {
+ *subprotocols = tmp_rh->subprotocols;
+ *connect_handler = tmp_rh->connect_handler;
+ *ready_handler = tmp_rh->ready_handler;
+ *data_handler = tmp_rh->data_handler;
+ *close_handler = tmp_rh->close_handler;
+ } else if (handler_type == REQUEST_HANDLER) {
+ if (tmp_rh->removing) {
+ /* Treat as none found */
+ step = 2;
+ break;
+ }
+ *handler = tmp_rh->handler;
+ /* Acquire handler and give it back */
+ tmp_rh->refcount++;
+ *handler_info = tmp_rh;
+ } else { /* AUTH_HANDLER */
+ *auth_handler = tmp_rh->auth_handler;
+ }
+ *cbdata = tmp_rh->cbdata;
+ mg_unlock_context(conn->phys_ctx);
+ return 1;
+ }
+ }
+ }
+
+ mg_unlock_context(conn->phys_ctx);
+ }
+ return 0; /* none found */
+}
+
+
+/* Check if the script file is in a path, allowed for script files.
+ * This can be used if uploading files is possible not only for the server
+ * admin, and the upload mechanism does not check the file extension.
+ */
+static int
+is_in_script_path(const struct mg_connection *conn, const char *path)
+{
+ /* TODO (Feature): Add config value for allowed script path.
+ * Default: All allowed. */
+ (void)conn;
+ (void)path;
+ return 1;
+}
+
+
+#if defined(USE_WEBSOCKET) && defined(MG_EXPERIMENTAL_INTERFACES)
+static int
+experimental_websocket_client_data_wrapper(struct mg_connection *conn,
+ int bits,
+ char *data,
+ size_t len,
+ void *cbdata)
+{
+ struct mg_callbacks *pcallbacks = (struct mg_callbacks *)cbdata;
+ if (pcallbacks->websocket_data) {
+ return pcallbacks->websocket_data(conn, bits, data, len);
+ }
+ /* No handler set - assume "OK" */
+ return 1;
+}
+
+
+static void
+experimental_websocket_client_close_wrapper(const struct mg_connection *conn,
+ void *cbdata)
+{
+ struct mg_callbacks *pcallbacks = (struct mg_callbacks *)cbdata;
+ if (pcallbacks->connection_close) {
+ pcallbacks->connection_close(conn);
+ }
+}
+#endif
+
+
+/* Decrement recount of handler. conn must not be NULL, handler_info may be NULL
+ */
+static void
+release_handler_ref(struct mg_connection *conn,
+ struct mg_handler_info *handler_info)
+{
+ if (handler_info != NULL) {
+ /* Use context lock for ref counter */
+ mg_lock_context(conn->phys_ctx);
+ handler_info->refcount--;
+ mg_unlock_context(conn->phys_ctx);
+ }
+}
+
+
+/* This is the heart of the Civetweb's logic.
+ * This function is called when the request is read, parsed and validated,
+ * and Civetweb must decide what action to take: serve a file, or
+ * a directory, or call embedded function, etcetera. */
+static void
+handle_request(struct mg_connection *conn)
+{
+ struct mg_request_info *ri = &conn->request_info;
+ char path[UTF8_PATH_MAX];
+ int uri_len, ssl_index;
+ int is_found = 0, is_script_resource = 0, is_websocket_request = 0,
+ is_put_or_delete_request = 0, is_callback_resource = 0,
+ is_template_text_file = 0, is_webdav_request = 0;
+ int i;
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ mg_request_handler callback_handler = NULL;
+ struct mg_handler_info *handler_info = NULL;
+ struct mg_websocket_subprotocols *subprotocols;
+ mg_websocket_connect_handler ws_connect_handler = NULL;
+ mg_websocket_ready_handler ws_ready_handler = NULL;
+ mg_websocket_data_handler ws_data_handler = NULL;
+ mg_websocket_close_handler ws_close_handler = NULL;
+ void *callback_data = NULL;
+ mg_authorization_handler auth_handler = NULL;
+ void *auth_callback_data = NULL;
+ int handler_type;
+ time_t curtime = time(NULL);
+ char date[64];
+ char *tmp;
+
+ path[0] = 0;
+
+ /* 0. Reset internal state (required for HTTP/2 proxy) */
+ conn->request_state = 0;
+
+ /* 1. get the request url */
+ /* 1.1. split into url and query string */
+ if ((conn->request_info.query_string = strchr(ri->request_uri, '?'))
+ != NULL) {
+ *((char *)conn->request_info.query_string++) = '\0';
+ }
+
+ /* 1.2. do a https redirect, if required. Do not decode URIs yet. */
+ if (!conn->client.is_ssl && conn->client.ssl_redir) {
+ ssl_index = get_first_ssl_listener_index(conn->phys_ctx);
+ if (ssl_index >= 0) {
+ int port = (int)ntohs(USA_IN_PORT_UNSAFE(
+ &(conn->phys_ctx->listening_sockets[ssl_index].lsa)));
+ redirect_to_https_port(conn, port);
+ } else {
+ /* A http to https forward port has been specified,
+ * but no https port to forward to. */
+ mg_send_http_error(conn,
+ 503,
+ "%s",
+ "Error: SSL forward not configured properly");
+ mg_cry_internal(conn,
+ "%s",
+ "Can not redirect to SSL, no SSL port available");
+ }
+ return;
+ }
+ uri_len = (int)strlen(ri->local_uri);
+
+ /* 1.3. decode url (if config says so) */
+ if (should_decode_url(conn)) {
+ url_decode_in_place((char *)ri->local_uri);
+ }
+
+ /* URL decode the query-string only if explicitly set in the configuration
+ */
+ if (conn->request_info.query_string) {
+ if (should_decode_query_string(conn)) {
+ url_decode_in_place((char *)conn->request_info.query_string);
+ }
+ }
+
+ /* 1.4. clean URIs, so a path like allowed_dir/../forbidden_file is not
+ * possible. The fact that we cleaned the URI is stored in that the
+ * pointer to ri->local_ur and ri->local_uri_raw are now different.
+ * ri->local_uri_raw still points to memory allocated in
+ * worker_thread_run(). ri->local_uri is private to the request so we
+ * don't have to use preallocated memory here. */
+ tmp = mg_strdup(ri->local_uri_raw);
+ if (!tmp) {
+ /* Out of memory. We cannot do anything reasonable here. */
+ return;
+ }
+ remove_dot_segments(tmp);
+ ri->local_uri = tmp;
+
+ /* step 1. completed, the url is known now */
+ DEBUG_TRACE("REQUEST: %s %s", ri->request_method, ri->local_uri);
+
+ /* 2. if this ip has limited speed, set it for this connection */
+ conn->throttle = set_throttle(conn->dom_ctx->config[THROTTLE],
+ &conn->client.rsa,
+ ri->local_uri);
+
+ /* 3. call a "handle everything" callback, if registered */
+ if (conn->phys_ctx->callbacks.begin_request != NULL) {
+ /* Note that since V1.7 the "begin_request" function is called
+ * before an authorization check. If an authorization check is
+ * required, use a request_handler instead. */
+ i = conn->phys_ctx->callbacks.begin_request(conn);
+ if (i > 0) {
+ /* callback already processed the request. Store the
+ return value as a status code for the access log. */
+ conn->status_code = i;
+ if (!conn->must_close) {
+ discard_unread_request_data(conn);
+ }
+ DEBUG_TRACE("%s", "begin_request handled request");
+ return;
+ } else if (i == 0) {
+ /* civetweb should process the request */
+ } else {
+ /* unspecified - may change with the next version */
+ DEBUG_TRACE("%s", "done (undocumented behavior)");
+ return;
+ }
+ }
+
+ /* request not yet handled by a handler or redirect, so the request
+ * is processed here */
+
+ /* 4. Check for CORS preflight requests and handle them (if configured).
+ * https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
+ */
+ if (!strcmp(ri->request_method, "OPTIONS")) {
+ /* Send a response to CORS preflights only if
+ * access_control_allow_methods is not NULL and not an empty string.
+ * In this case, scripts can still handle CORS. */
+ const char *cors_meth_cfg =
+ conn->dom_ctx->config[ACCESS_CONTROL_ALLOW_METHODS];
+ const char *cors_orig_cfg =
+ conn->dom_ctx->config[ACCESS_CONTROL_ALLOW_ORIGIN];
+ const char *cors_origin =
+ get_header(ri->http_headers, ri->num_headers, "Origin");
+ const char *cors_acrm = get_header(ri->http_headers,
+ ri->num_headers,
+ "Access-Control-Request-Method");
+
+ /* Todo: check if cors_origin is in cors_orig_cfg.
+ * Or, let the client check this. */
+
+ if ((cors_meth_cfg != NULL) && (*cors_meth_cfg != 0)
+ && (cors_orig_cfg != NULL) && (*cors_orig_cfg != 0)
+ && (cors_origin != NULL) && (cors_acrm != NULL)) {
+ /* This is a valid CORS preflight, and the server is configured
+ * to handle it automatically. */
+ const char *cors_acrh =
+ get_header(ri->http_headers,
+ ri->num_headers,
+ "Access-Control-Request-Headers");
+
+ gmt_time_string(date, sizeof(date), &curtime);
+ mg_printf(conn,
+ "HTTP/1.1 200 OK\r\n"
+ "Date: %s\r\n"
+ "Access-Control-Allow-Origin: %s\r\n"
+ "Access-Control-Allow-Methods: %s\r\n"
+ "Content-Length: 0\r\n"
+ "Connection: %s\r\n",
+ date,
+ cors_orig_cfg,
+ ((cors_meth_cfg[0] == '*') ? cors_acrm : cors_meth_cfg),
+ suggest_connection_header(conn));
+
+ if (cors_acrh != NULL) {
+ /* CORS request is asking for additional headers */
+ const char *cors_hdr_cfg =
+ conn->dom_ctx->config[ACCESS_CONTROL_ALLOW_HEADERS];
+
+ if ((cors_hdr_cfg != NULL) && (*cors_hdr_cfg != 0)) {
+ /* Allow only if access_control_allow_headers is
+ * not NULL and not an empty string. If this
+ * configuration is set to *, allow everything.
+ * Otherwise this configuration must be a list
+ * of allowed HTTP header names. */
+ mg_printf(conn,
+ "Access-Control-Allow-Headers: %s\r\n",
+ ((cors_hdr_cfg[0] == '*') ? cors_acrh
+ : cors_hdr_cfg));
+ }
+ }
+ mg_printf(conn, "Access-Control-Max-Age: 60\r\n");
+ mg_printf(conn, "\r\n");
+ DEBUG_TRACE("%s", "OPTIONS done");
+ return;
+ }
+ }
+
+ /* 5. interpret the url to find out how the request must be handled
+ */
+ /* 5.1. first test, if the request targets the regular http(s)://
+ * protocol namespace or the websocket ws(s):// protocol namespace.
+ */
+ is_websocket_request = (conn->protocol_type == PROTOCOL_TYPE_WEBSOCKET);
+#if defined(USE_WEBSOCKET)
+ handler_type = is_websocket_request ? WEBSOCKET_HANDLER : REQUEST_HANDLER;
+#else
+ handler_type = REQUEST_HANDLER;
+#endif /* defined(USE_WEBSOCKET) */
+
+ if (is_websocket_request) {
+ HTTP1_only;
+ }
+
+ /* 5.2. check if the request will be handled by a callback */
+ if (get_request_handler(conn,
+ handler_type,
+ &callback_handler,
+ &subprotocols,
+ &ws_connect_handler,
+ &ws_ready_handler,
+ &ws_data_handler,
+ &ws_close_handler,
+ NULL,
+ &callback_data,
+ &handler_info)) {
+ /* 5.2.1. A callback will handle this request. All requests
+ * handled by a callback have to be considered as requests
+ * to a script resource. */
+ is_callback_resource = 1;
+ is_script_resource = 1;
+ is_put_or_delete_request = is_put_or_delete_method(conn);
+ /* Never handle a C callback according to File WebDav rules,
+ * even if it is a webdav method */
+ is_webdav_request = 0; /* is_civetweb_webdav_method(conn); */
+ } else {
+ no_callback_resource:
+
+ /* 5.2.2. No callback is responsible for this request. The URI
+ * addresses a file based resource (static content or Lua/cgi
+ * scripts in the file system). */
+ is_callback_resource = 0;
+ interpret_uri(conn,
+ path,
+ sizeof(path),
+ &file.stat,
+ &is_found,
+ &is_script_resource,
+ &is_websocket_request,
+ &is_put_or_delete_request,
+ &is_webdav_request,
+ &is_template_text_file);
+ }
+
+ /* 5.3. A webdav request (PROPFIND/PROPPATCH/LOCK/UNLOCK) */
+ if (is_webdav_request) {
+ /* TODO: Do we need a config option? */
+ const char *webdav_enable = conn->dom_ctx->config[ENABLE_WEBDAV];
+ if (webdav_enable[0] != 'y') {
+ mg_send_http_error(conn,
+ 405,
+ "%s method not allowed",
+ conn->request_info.request_method);
+ DEBUG_TRACE("%s", "webdav rejected");
+ return;
+ }
+ }
+
+ /* 6. authorization check */
+ /* 6.1. a custom authorization handler is installed */
+ if (get_request_handler(conn,
+ AUTH_HANDLER,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ &auth_handler,
+ &auth_callback_data,
+ NULL)) {
+ if (!auth_handler(conn, auth_callback_data)) {
+
+ /* Callback handler will not be used anymore. Release it */
+ release_handler_ref(conn, handler_info);
+ DEBUG_TRACE("%s", "auth handler rejected request");
+ return;
+ }
+ } else if (is_put_or_delete_request && !is_script_resource
+ && !is_callback_resource) {
+ HTTP1_only;
+ /* 6.2. this request is a PUT/DELETE to a real file */
+ /* 6.2.1. thus, the server must have real files */
+#if defined(NO_FILES)
+ if (1) {
+#else
+ if (conn->dom_ctx->config[DOCUMENT_ROOT] == NULL
+ || conn->dom_ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL) {
+#endif
+ /* This code path will not be called for request handlers */
+ DEBUG_ASSERT(handler_info == NULL);
+
+ /* This server does not have any real files, thus the
+ * PUT/DELETE methods are not valid. */
+ mg_send_http_error(conn,
+ 405,
+ "%s method not allowed",
+ conn->request_info.request_method);
+ DEBUG_TRACE("%s", "all file based put/delete requests rejected");
+ return;
+ }
+
+#if !defined(NO_FILES)
+ /* 6.2.2. Check if put authorization for static files is
+ * available.
+ */
+ if (!is_authorized_for_put(conn)) {
+ send_authorization_request(conn, NULL);
+ DEBUG_TRACE("%s", "file write needs authorization");
+ return;
+ }
+#endif
+
+ } else {
+ /* 6.3. This is either a OPTIONS, GET, HEAD or POST request,
+ * or it is a PUT or DELETE request to a resource that does not
+ * correspond to a file. Check authorization. */
+ if (!check_authorization(conn, path)) {
+ send_authorization_request(conn, NULL);
+
+ /* Callback handler will not be used anymore. Release it */
+ release_handler_ref(conn, handler_info);
+ DEBUG_TRACE("%s", "access authorization required");
+ return;
+ }
+ }
+
+ /* request is authorized or does not need authorization */
+
+ /* 7. check if there are request handlers for this uri */
+ if (is_callback_resource) {
+ HTTP1_only;
+ if (!is_websocket_request) {
+ i = callback_handler(conn, callback_data);
+
+ /* Callback handler will not be used anymore. Release it */
+ release_handler_ref(conn, handler_info);
+
+ if (i > 0) {
+ /* Do nothing, callback has served the request. Store
+ * then return value as status code for the log and discard
+ * all data from the client not used by the callback. */
+ conn->status_code = i;
+ if (!conn->must_close) {
+ discard_unread_request_data(conn);
+ }
+ } else {
+ /* The handler did NOT handle the request. */
+ /* Some proper reactions would be:
+ * a) close the connections without sending anything
+ * b) send a 404 not found
+ * c) try if there is a file matching the URI
+ * It would be possible to do a, b or c in the callback
+ * implementation, and return 1 - we cannot do anything
+ * here, that is not possible in the callback.
+ *
+ * TODO: What would be the best reaction here?
+ * (Note: The reaction may change, if there is a better
+ * idea.)
+ */
+
+ /* For the moment, use option c: We look for a proper file,
+ * but since a file request is not always a script resource,
+ * the authorization check might be different. */
+ callback_handler = NULL;
+
+ /* Here we are at a dead end:
+ * According to URI matching, a callback should be
+ * responsible for handling the request,
+ * we called it, but the callback declared itself
+ * not responsible.
+ * We use a goto here, to get out of this dead end,
+ * and continue with the default handling.
+ * A goto here is simpler and better to understand
+ * than some curious loop. */
+ goto no_callback_resource;
+ }
+ } else {
+#if defined(USE_WEBSOCKET)
+ handle_websocket_request(conn,
+ path,
+ is_callback_resource,
+ subprotocols,
+ ws_connect_handler,
+ ws_ready_handler,
+ ws_data_handler,
+ ws_close_handler,
+ callback_data);
+#endif
+ }
+ DEBUG_TRACE("%s", "websocket handling done");
+ return;
+ }
+
+ /* 8. handle websocket requests */
+#if defined(USE_WEBSOCKET)
+ if (is_websocket_request) {
+ HTTP1_only;
+ if (is_script_resource) {
+
+ if (is_in_script_path(conn, path)) {
+ /* Websocket Lua script */
+ handle_websocket_request(conn,
+ path,
+ 0 /* Lua Script */,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ conn->phys_ctx->user_data);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ } else {
+ mg_send_http_error(conn, 404, "%s", "Not found");
+ }
+ DEBUG_TRACE("%s", "websocket script done");
+ return;
+ } else
+#endif
+
+#if defined(NO_FILES)
+ /* 9a. In case the server uses only callbacks, this uri is
+ * unknown.
+ * Then, all request handling ends here. */
+ mg_send_http_error(conn, 404, "%s", "Not Found");
+
+#else
+ /* 9b. This request is either for a static file or resource handled
+ * by a script file. Thus, a DOCUMENT_ROOT must exist. */
+ if (conn->dom_ctx->config[DOCUMENT_ROOT] == NULL) {
+ mg_send_http_error(conn, 404, "%s", "Not Found");
+ DEBUG_TRACE("%s", "no document root available");
+ return;
+ }
+
+ /* 10. Request is handled by a script */
+ if (is_script_resource) {
+ HTTP1_only;
+ handle_file_based_request(conn, path, &file);
+ DEBUG_TRACE("%s", "script handling done");
+ return;
+ }
+
+ /* Request was not handled by a callback or script. It will be
+ * handled by a server internal method. */
+
+ /* 11. Handle put/delete/mkcol requests */
+ if (is_put_or_delete_request) {
+ HTTP1_only;
+ /* 11.1. PUT method */
+ if (!strcmp(ri->request_method, "PUT")) {
+ put_file(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.2. DELETE method */
+ if (!strcmp(ri->request_method, "DELETE")) {
+ delete_file(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.3. MKCOL method */
+ if (!strcmp(ri->request_method, "MKCOL")) {
+ dav_mkcol(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.4. MOVE method */
+ if (!strcmp(ri->request_method, "MOVE")) {
+ dav_move_file(conn, path, 0);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ if (!strcmp(ri->request_method, "COPY")) {
+ dav_move_file(conn, path, 1);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.5. LOCK method */
+ if (!strcmp(ri->request_method, "LOCK")) {
+ dav_lock_file(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.6. UNLOCK method */
+ if (!strcmp(ri->request_method, "UNLOCK")) {
+ dav_unlock_file(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.7. PROPPATCH method */
+ if (!strcmp(ri->request_method, "PROPPATCH")) {
+ dav_proppatch(conn, path);
+ DEBUG_TRACE("handling %s request to %s done",
+ ri->request_method,
+ path);
+ return;
+ }
+ /* 11.8. Other methods, e.g.: PATCH
+ * This method is not supported for static resources,
+ * only for scripts (Lua, CGI) and callbacks. */
+ mg_send_http_error(conn,
+ 405,
+ "%s method not allowed",
+ conn->request_info.request_method);
+ DEBUG_TRACE("method %s on %s is not supported",
+ ri->request_method,
+ path);
+ return;
+ }
+
+ /* 11. File does not exist, or it was configured that it should be
+ * hidden */
+ if (!is_found || (must_hide_file(conn, path))) {
+ mg_send_http_error(conn, 404, "%s", "Not found");
+ DEBUG_TRACE("handling %s request to %s: file not found",
+ ri->request_method,
+ path);
+ return;
+ }
+
+ /* 12. Directory uris should end with a slash */
+ if (file.stat.is_directory && ((uri_len = (int)strlen(ri->local_uri)) > 0)
+ && (ri->local_uri[uri_len - 1] != '/')) {
+
+ /* Path + server root */
+ size_t buflen = UTF8_PATH_MAX * 2 + 2;
+ char *new_path;
+
+ if (ri->query_string) {
+ buflen += strlen(ri->query_string);
+ }
+ new_path = (char *)mg_malloc_ctx(buflen, conn->phys_ctx);
+ if (!new_path) {
+ mg_send_http_error(conn, 500, "out or memory");
+ } else {
+ mg_get_request_link(conn, new_path, buflen - 1);
+ strcat(new_path, "/");
+ if (ri->query_string) {
+ /* Append ? and query string */
+ strcat(new_path, "?");
+ strcat(new_path, ri->query_string);
+ }
+ mg_send_http_redirect(conn, new_path, 301);
+ mg_free(new_path);
+ }
+ DEBUG_TRACE("%s request to %s: directory redirection sent",
+ ri->request_method,
+ path);
+ return;
+ }
+
+ /* 13. Handle other methods than GET/HEAD */
+ /* 13.1. Handle PROPFIND */
+ if (!strcmp(ri->request_method, "PROPFIND")) {
+ handle_propfind(conn, path, &file.stat);
+ DEBUG_TRACE("handling %s request to %s done", ri->request_method, path);
+ return;
+ }
+ /* 13.2. Handle OPTIONS for files */
+ if (!strcmp(ri->request_method, "OPTIONS")) {
+ /* This standard handler is only used for real files.
+ * Scripts should support the OPTIONS method themselves, to allow a
+ * maximum flexibility.
+ * Lua and CGI scripts may fully support CORS this way (including
+ * preflights). */
+ send_options(conn);
+ DEBUG_TRACE("handling %s request to %s done", ri->request_method, path);
+ return;
+ }
+ /* 13.3. everything but GET and HEAD (e.g. POST) */
+ if ((0 != strcmp(ri->request_method, "GET"))
+ && (0 != strcmp(ri->request_method, "HEAD"))) {
+ mg_send_http_error(conn,
+ 405,
+ "%s method not allowed",
+ conn->request_info.request_method);
+ DEBUG_TRACE("handling %s request to %s done", ri->request_method, path);
+ return;
+ }
+
+ /* 14. directories */
+ if (file.stat.is_directory) {
+ /* Substitute files have already been handled above. */
+ /* Here we can either generate and send a directory listing,
+ * or send an "access denied" error. */
+ if (!mg_strcasecmp(conn->dom_ctx->config[ENABLE_DIRECTORY_LISTING],
+ "yes")) {
+ handle_directory_request(conn, path);
+ } else {
+ mg_send_http_error(conn,
+ 403,
+ "%s",
+ "Error: Directory listing denied");
+ }
+ DEBUG_TRACE("handling %s request to %s done", ri->request_method, path);
+ return;
+ }
+
+ /* 15. Files with search/replace patterns: LSP and SSI */
+ if (is_template_text_file) {
+ HTTP1_only;
+ handle_file_based_request(conn, path, &file);
+ DEBUG_TRACE("handling %s request to %s done (template)",
+ ri->request_method,
+ path);
+ return;
+ }
+
+ /* 16. Static file - maybe cached */
+#if !defined(NO_CACHING)
+ if ((!conn->in_error_handler) && is_not_modified(conn, &file.stat)) {
+ /* Send 304 "Not Modified" - this must not send any body data */
+ handle_not_modified_static_file_request(conn, &file);
+ DEBUG_TRACE("handling %s request to %s done (not modified)",
+ ri->request_method,
+ path);
+ return;
+ }
+#endif /* !NO_CACHING */
+
+ /* 17. Static file - not cached */
+ handle_static_file_request(conn, path, &file, NULL, NULL);
+ DEBUG_TRACE("handling %s request to %s done (static)",
+ ri->request_method,
+ path);
+
+#endif /* !defined(NO_FILES) */
+}
+
+
+#if !defined(NO_FILESYSTEMS)
+static void
+handle_file_based_request(struct mg_connection *conn,
+ const char *path,
+ struct mg_file *file)
+{
+#if !defined(NO_CGI)
+ int cgi_config_idx, inc, max;
+#endif
+
+ if (!conn || !conn->dom_ctx) {
+ return;
+ }
+
+#if defined(USE_LUA)
+ if (match_prefix_strlen(conn->dom_ctx->config[LUA_SERVER_PAGE_EXTENSIONS],
+ path)
+ > 0) {
+ if (is_in_script_path(conn, path)) {
+ /* Lua server page: an SSI like page containing mostly plain
+ * html code plus some tags with server generated contents. */
+ handle_lsp_request(conn, path, file, NULL);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ return;
+ }
+
+ if (match_prefix_strlen(conn->dom_ctx->config[LUA_SCRIPT_EXTENSIONS], path)
+ > 0) {
+ if (is_in_script_path(conn, path)) {
+ /* Lua in-server module script: a CGI like script used to
+ * generate the entire reply. */
+ mg_exec_lua_script(conn, path, NULL);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ return;
+ }
+#endif
+
+#if defined(USE_DUKTAPE)
+ if (match_prefix_strlen(conn->dom_ctx->config[DUKTAPE_SCRIPT_EXTENSIONS],
+ path)
+ > 0) {
+ if (is_in_script_path(conn, path)) {
+ /* Call duktape to generate the page */
+ mg_exec_duktape_script(conn, path);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ return;
+ }
+#endif
+
+#if !defined(NO_CGI)
+ inc = CGI2_EXTENSIONS - CGI_EXTENSIONS;
+ max = PUT_DELETE_PASSWORDS_FILE - CGI_EXTENSIONS;
+ for (cgi_config_idx = 0; cgi_config_idx < max; cgi_config_idx += inc) {
+ if (conn->dom_ctx->config[CGI_EXTENSIONS + cgi_config_idx] != NULL) {
+ if (match_prefix_strlen(
+ conn->dom_ctx->config[CGI_EXTENSIONS + cgi_config_idx],
+ path)
+ > 0) {
+ if (is_in_script_path(conn, path)) {
+ /* CGI scripts may support all HTTP methods */
+ handle_cgi_request(conn, path, cgi_config_idx);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ return;
+ }
+ }
+ }
+#endif /* !NO_CGI */
+
+ if (match_prefix_strlen(conn->dom_ctx->config[SSI_EXTENSIONS], path) > 0) {
+ if (is_in_script_path(conn, path)) {
+ handle_ssi_file_request(conn, path, file);
+ } else {
+ /* Script was in an illegal path */
+ mg_send_http_error(conn, 403, "%s", "Forbidden");
+ }
+ return;
+ }
+
+#if !defined(NO_CACHING)
+ if ((!conn->in_error_handler) && is_not_modified(conn, &file->stat)) {
+ /* Send 304 "Not Modified" - this must not send any body data */
+ handle_not_modified_static_file_request(conn, file);
+ return;
+ }
+#endif /* !NO_CACHING */
+
+ handle_static_file_request(conn, path, file, NULL, NULL);
+}
+#endif /* NO_FILESYSTEMS */
+
+
+static void
+close_all_listening_sockets(struct mg_context *ctx)
+{
+ unsigned int i;
+ if (!ctx) {
+ return;
+ }
+
+ for (i = 0; i < ctx->num_listening_sockets; i++) {
+ closesocket(ctx->listening_sockets[i].sock);
+#if defined(USE_X_DOM_SOCKET)
+ /* For unix domain sockets, the socket name represents a file that has
+ * to be deleted. */
+ /* See
+ * https://stackoverflow.com/questions/15716302/so-reuseaddr-and-af-unix
+ */
+ if ((ctx->listening_sockets[i].lsa.sin.sin_family == AF_UNIX)
+ && (ctx->listening_sockets[i].sock != INVALID_SOCKET)) {
+ IGNORE_UNUSED_RESULT(
+ remove(ctx->listening_sockets[i].lsa.sun.sun_path));
+ }
+#endif
+ ctx->listening_sockets[i].sock = INVALID_SOCKET;
+ }
+ mg_free(ctx->listening_sockets);
+ ctx->listening_sockets = NULL;
+ mg_free(ctx->listening_socket_fds);
+ ctx->listening_socket_fds = NULL;
+}
+
+
+/* Valid listening port specification is: [ip_address:]port[s]
+ * Examples for IPv4: 80, 443s, 127.0.0.1:3128, 192.0.2.3:8080s
+ * Examples for IPv6: [::]:80, [::1]:80,
+ * [2001:0db8:7654:3210:FEDC:BA98:7654:3210]:443s
+ * see https://tools.ietf.org/html/rfc3513#section-2.2
+ * In order to bind to both, IPv4 and IPv6, you can either add
+ * both ports using 8080,[::]:8080, or the short form +8080.
+ * Both forms differ in detail: 8080,[::]:8080 create two sockets,
+ * one only accepting IPv4 the other only IPv6. +8080 creates
+ * one socket accepting IPv4 and IPv6. Depending on the IPv6
+ * environment, they might work differently, or might not work
+ * at all - it must be tested what options work best in the
+ * relevant network environment.
+ */
+static int
+parse_port_string(const struct vec *vec, struct socket *so, int *ip_version)
+{
+ unsigned int a, b, c, d;
+ unsigned port;
+ unsigned long portUL;
+ int ch, len;
+ const char *cb;
+ char *endptr;
+#if defined(USE_IPV6)
+ char buf[100] = {0};
+#endif
+
+ /* MacOS needs that. If we do not zero it, subsequent bind() will fail.
+ * Also, all-zeroes in the socket address means binding to all addresses
+ * for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). */
+ memset(so, 0, sizeof(*so));
+ so->lsa.sin.sin_family = AF_INET;
+ *ip_version = 0;
+
+ /* Initialize len as invalid. */
+ port = 0;
+ len = 0;
+
+ /* Test for different ways to format this string */
+ if (sscanf(vec->ptr,
+ "%u.%u.%u.%u:%u%n",
+ &a,
+ &b,
+ &c,
+ &d,
+ &port,
+ &len) // NOLINT(cert-err34-c) 'sscanf' used to convert a string
+ // to an integer value, but function will not report
+ // conversion errors; consider using 'strtol' instead
+ == 5) {
+ /* Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 */
+ so->lsa.sin.sin_addr.s_addr =
+ htonl((a << 24) | (b << 16) | (c << 8) | d);
+ so->lsa.sin.sin_port = htons((uint16_t)port);
+ *ip_version = 4;
+
+#if defined(USE_IPV6)
+ } else if (sscanf(vec->ptr, "[%49[^]]]:%u%n", buf, &port, &len) == 2
+ && ((size_t)len <= vec->len)
+ && mg_inet_pton(
+ AF_INET6, buf, &so->lsa.sin6, sizeof(so->lsa.sin6), 0)) {
+ /* IPv6 address, examples: see above */
+ /* so->lsa.sin6.sin6_family = AF_INET6; already set by mg_inet_pton
+ */
+ so->lsa.sin6.sin6_port = htons((uint16_t)port);
+ *ip_version = 6;
+#endif
+
+ } else if ((vec->ptr[0] == '+')
+ && (sscanf(vec->ptr + 1, "%u%n", &port, &len)
+ == 1)) { // NOLINT(cert-err34-c) 'sscanf' used to convert a
+ // string to an integer value, but function will not
+ // report conversion errors; consider using 'strtol'
+ // instead
+
+ /* Port is specified with a +, bind to IPv6 and IPv4, INADDR_ANY */
+ /* Add 1 to len for the + character we skipped before */
+ len++;
+
+#if defined(USE_IPV6)
+ /* Set socket family to IPv6, do not use IPV6_V6ONLY */
+ so->lsa.sin6.sin6_family = AF_INET6;
+ so->lsa.sin6.sin6_port = htons((uint16_t)port);
+ *ip_version = 4 + 6;
+#else
+ /* Bind to IPv4 only, since IPv6 is not built in. */
+ so->lsa.sin.sin_port = htons((uint16_t)port);
+ *ip_version = 4;
+#endif
+
+ } else if (is_valid_port(portUL = strtoul(vec->ptr, &endptr, 0))
+ && (vec->ptr != endptr)) {
+ len = (int)(endptr - vec->ptr);
+ port = (uint16_t)portUL;
+ /* If only port is specified, bind to IPv4, INADDR_ANY */
+ so->lsa.sin.sin_port = htons((uint16_t)port);
+ *ip_version = 4;
+
+ } else if ((cb = strchr(vec->ptr, ':')) != NULL) {
+ /* String could be a hostname. This check algorithm
+ * will only work for RFC 952 compliant hostnames,
+ * starting with a letter, containing only letters,
+ * digits and hyphen ('-'). Newer specs may allow
+ * more, but this is not guaranteed here, since it
+ * may interfere with rules for port option lists. */
+
+ /* According to RFC 1035, hostnames are restricted to 255 characters
+ * in total (63 between two dots). */
+ char hostname[256];
+ size_t hostnlen = (size_t)(cb - vec->ptr);
+
+ if ((hostnlen >= vec->len) || (hostnlen >= sizeof(hostname))) {
+ /* This would be invalid in any case */
+ *ip_version = 0;
+ return 0;
+ }
+
+ mg_strlcpy(hostname, vec->ptr, hostnlen + 1);
+
+ if (mg_inet_pton(
+ AF_INET, hostname, &so->lsa.sin, sizeof(so->lsa.sin), 1)) {
+ if (sscanf(cb + 1, "%u%n", &port, &len)
+ == 1) { // NOLINT(cert-err34-c) 'sscanf' used to convert a
+ // string to an integer value, but function will not
+ // report conversion errors; consider using 'strtol'
+ // instead
+ *ip_version = 4;
+ so->lsa.sin.sin_port = htons((uint16_t)port);
+ len += (int)(hostnlen + 1);
+ } else {
+ len = 0;
+ }
+#if defined(USE_IPV6)
+ } else if (mg_inet_pton(AF_INET6,
+ hostname,
+ &so->lsa.sin6,
+ sizeof(so->lsa.sin6),
+ 1)) {
+ if (sscanf(cb + 1, "%u%n", &port, &len) == 1) {
+ *ip_version = 6;
+ so->lsa.sin6.sin6_port = htons((uint16_t)port);
+ len += (int)(hostnlen + 1);
+ } else {
+ len = 0;
+ }
+#endif
+ } else {
+ len = 0;
+ }
+
+#if defined(USE_X_DOM_SOCKET)
+
+ } else if (vec->ptr[0] == 'x') {
+ /* unix (linux) domain socket */
+ if (vec->len < sizeof(so->lsa.sun.sun_path)) {
+ len = vec->len;
+ so->lsa.sun.sun_family = AF_UNIX;
+ memset(so->lsa.sun.sun_path, 0, sizeof(so->lsa.sun.sun_path));
+ memcpy(so->lsa.sun.sun_path, (char *)vec->ptr + 1, vec->len - 1);
+ port = 0;
+ *ip_version = 99;
+ } else {
+ /* String too long */
+ len = 0;
+ }
+#endif
+
+ } else {
+ /* Parsing failure. */
+ len = 0;
+ }
+
+ /* sscanf and the option splitting code ensure the following condition
+ * Make sure the port is valid and vector ends with the port, 's' or 'r' */
+ if ((len > 0) && is_valid_port(port)
+ && (((size_t)len == vec->len) || (((size_t)len + 1) == vec->len))) {
+ /* Next character after the port number */
+ ch = ((size_t)len < vec->len) ? vec->ptr[len] : '\0';
+ so->is_ssl = (ch == 's');
+ so->ssl_redir = (ch == 'r');
+ if ((ch == '\0') || (ch == 's') || (ch == 'r')) {
+ return 1;
+ }
+ }
+
+ /* Reset ip_version to 0 if there is an error */
+ *ip_version = 0;
+ return 0;
+}
+
+
+/* Is there any SSL port in use? */
+static int
+is_ssl_port_used(const char *ports)
+{
+ if (ports) {
+ /* There are several different allowed syntax variants:
+ * - "80" for a single port using every network interface
+ * - "localhost:80" for a single port using only localhost
+ * - "80,localhost:8080" for two ports, one bound to localhost
+ * - "80,127.0.0.1:8084,[::1]:8086" for three ports, one bound
+ * to IPv4 localhost, one to IPv6 localhost
+ * - "+80" use port 80 for IPv4 and IPv6
+ * - "+80r,+443s" port 80 (HTTP) is a redirect to port 443 (HTTPS),
+ * for both: IPv4 and IPv4
+ * - "+443s,localhost:8080" port 443 (HTTPS) for every interface,
+ * additionally port 8080 bound to localhost connections
+ *
+ * If we just look for 's' anywhere in the string, "localhost:80"
+ * will be detected as SSL (false positive).
+ * Looking for 's' after a digit may cause false positives in
+ * "my24service:8080".
+ * Looking from 's' backward if there are only ':' and numbers
+ * before will not work for "24service:8080" (non SSL, port 8080)
+ * or "24s" (SSL, port 24).
+ *
+ * Remark: Initially hostnames were not allowed to start with a
+ * digit (according to RFC 952), this was allowed later (RFC 1123,
+ * Section 2.1).
+ *
+ * To get this correct, the entire string must be parsed as a whole,
+ * reading it as a list element for element and parsing with an
+ * algorithm equivalent to parse_port_string.
+ *
+ * In fact, we use local interface names here, not arbitrary
+ * hostnames, so in most cases the only name will be "localhost".
+ *
+ * So, for now, we use this simple algorithm, that may still return
+ * a false positive in bizarre cases.
+ */
+ int i;
+ int portslen = (int)strlen(ports);
+ char prevIsNumber = 0;
+
+ for (i = 0; i < portslen; i++) {
+ if (prevIsNumber && (ports[i] == 's' || ports[i] == 'r')) {
+ return 1;
+ }
+ if (ports[i] >= '0' && ports[i] <= '9') {
+ prevIsNumber = 1;
+ } else {
+ prevIsNumber = 0;
+ }
+ }
+ }
+ return 0;
+}
+
+
+static int
+set_ports_option(struct mg_context *phys_ctx)
+{
+ const char *list;
+ int on = 1;
+#if defined(USE_IPV6)
+ int off = 0;
+#endif
+ struct vec vec;
+ struct socket so, *ptr;
+
+ struct mg_pollfd *pfd;
+ union usa usa;
+ socklen_t len;
+ int ip_version;
+
+ int portsTotal = 0;
+ int portsOk = 0;
+
+ const char *opt_txt;
+ long opt_listen_backlog;
+
+ if (!phys_ctx) {
+ return 0;
+ }
+
+ memset(&so, 0, sizeof(so));
+ memset(&usa, 0, sizeof(usa));
+ len = sizeof(usa);
+ list = phys_ctx->dd.config[LISTENING_PORTS];
+
+ while ((list = next_option(list, &vec, NULL)) != NULL) {
+
+ portsTotal++;
+
+ if (!parse_port_string(&vec, &so, &ip_version)) {
+ mg_cry_ctx_internal(
+ phys_ctx,
+ "%.*s: invalid port spec (entry %i). Expecting list of: %s",
+ (int)vec.len,
+ vec.ptr,
+ portsTotal,
+ "[IP_ADDRESS:]PORT[s|r]");
+ continue;
+ }
+
+#if !defined(NO_SSL)
+ if (so.is_ssl && phys_ctx->dd.ssl_ctx == NULL) {
+
+ mg_cry_ctx_internal(phys_ctx,
+ "Cannot add SSL socket (entry %i)",
+ portsTotal);
+ continue;
+ }
+#endif
+ /* Create socket. */
+ /* For a list of protocol numbers (e.g., TCP==6) see:
+ * https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
+ */
+ if ((so.sock =
+ socket(so.lsa.sa.sa_family,
+ SOCK_STREAM,
+ (ip_version == 99) ? (/* LOCAL */ 0) : (/* TCP */ 6)))
+ == INVALID_SOCKET) {
+
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot create socket (entry %i)",
+ portsTotal);
+ continue;
+ }
+
+#if defined(_WIN32)
+ /* Windows SO_REUSEADDR lets many procs binds to a
+ * socket, SO_EXCLUSIVEADDRUSE makes the bind fail
+ * if someone already has the socket -- DTL */
+ /* NOTE: If SO_EXCLUSIVEADDRUSE is used,
+ * Windows might need a few seconds before
+ * the same port can be used again in the
+ * same process, so a short Sleep may be
+ * required between mg_stop and mg_start.
+ */
+ if (setsockopt(so.sock,
+ SOL_SOCKET,
+ SO_EXCLUSIVEADDRUSE,
+ (SOCK_OPT_TYPE)&on,
+ sizeof(on))
+ != 0) {
+
+ /* Set reuse option, but don't abort on errors. */
+ mg_cry_ctx_internal(
+ phys_ctx,
+ "cannot set socket option SO_EXCLUSIVEADDRUSE (entry %i)",
+ portsTotal);
+ }
+#else
+ if (setsockopt(so.sock,
+ SOL_SOCKET,
+ SO_REUSEADDR,
+ (SOCK_OPT_TYPE)&on,
+ sizeof(on))
+ != 0) {
+
+ /* Set reuse option, but don't abort on errors. */
+ mg_cry_ctx_internal(
+ phys_ctx,
+ "cannot set socket option SO_REUSEADDR (entry %i)",
+ portsTotal);
+ }
+#endif
+
+#if defined(USE_X_DOM_SOCKET)
+ if (ip_version == 99) {
+ /* Unix domain socket */
+ } else
+#endif
+
+ if (ip_version > 4) {
+ /* Could be 6 for IPv6 onlyor 10 (4+6) for IPv4+IPv6 */
+#if defined(USE_IPV6)
+ if (ip_version > 6) {
+ if (so.lsa.sa.sa_family == AF_INET6
+ && setsockopt(so.sock,
+ IPPROTO_IPV6,
+ IPV6_V6ONLY,
+ (void *)&off,
+ sizeof(off))
+ != 0) {
+
+ /* Set IPv6 only option, but don't abort on errors. */
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot set socket option "
+ "IPV6_V6ONLY=off (entry %i)",
+ portsTotal);
+ }
+ } else {
+ if (so.lsa.sa.sa_family == AF_INET6
+ && setsockopt(so.sock,
+ IPPROTO_IPV6,
+ IPV6_V6ONLY,
+ (void *)&on,
+ sizeof(on))
+ != 0) {
+
+ /* Set IPv6 only option, but don't abort on errors. */
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot set socket option "
+ "IPV6_V6ONLY=on (entry %i)",
+ portsTotal);
+ }
+ }
+#else
+ mg_cry_ctx_internal(phys_ctx, "%s", "IPv6 not available");
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+#endif
+ }
+
+ if (so.lsa.sa.sa_family == AF_INET) {
+
+ len = sizeof(so.lsa.sin);
+ if (bind(so.sock, &so.lsa.sa, len) != 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot bind to %.*s: %d (%s)",
+ (int)vec.len,
+ vec.ptr,
+ (int)ERRNO,
+ strerror(errno));
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+ }
+#if defined(USE_IPV6)
+ else if (so.lsa.sa.sa_family == AF_INET6) {
+
+ len = sizeof(so.lsa.sin6);
+ if (bind(so.sock, &so.lsa.sa, len) != 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot bind to IPv6 %.*s: %d (%s)",
+ (int)vec.len,
+ vec.ptr,
+ (int)ERRNO,
+ strerror(errno));
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+ }
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ else if (so.lsa.sa.sa_family == AF_UNIX) {
+
+ len = sizeof(so.lsa.sun);
+ if (bind(so.sock, &so.lsa.sa, len) != 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot bind to unix socket %s: %d (%s)",
+ so.lsa.sun.sun_path,
+ (int)ERRNO,
+ strerror(errno));
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+ }
+#endif
+ else {
+ mg_cry_ctx_internal(
+ phys_ctx,
+ "cannot bind: address family not supported (entry %i)",
+ portsTotal);
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+
+ opt_txt = phys_ctx->dd.config[LISTEN_BACKLOG_SIZE];
+ opt_listen_backlog = strtol(opt_txt, NULL, 10);
+ if ((opt_listen_backlog > INT_MAX) || (opt_listen_backlog < 1)) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s value \"%s\" is invalid",
+ config_options[LISTEN_BACKLOG_SIZE].name,
+ opt_txt);
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+
+ if (listen(so.sock, (int)opt_listen_backlog) != 0) {
+
+ mg_cry_ctx_internal(phys_ctx,
+ "cannot listen to %.*s: %d (%s)",
+ (int)vec.len,
+ vec.ptr,
+ (int)ERRNO,
+ strerror(errno));
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+
+ if ((getsockname(so.sock, &(usa.sa), &len) != 0)
+ || (usa.sa.sa_family != so.lsa.sa.sa_family)) {
+
+ int err = (int)ERRNO;
+ mg_cry_ctx_internal(phys_ctx,
+ "call to getsockname failed %.*s: %d (%s)",
+ (int)vec.len,
+ vec.ptr,
+ err,
+ strerror(errno));
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+
+ /* Update lsa port in case of random free ports */
+#if defined(USE_IPV6)
+ if (so.lsa.sa.sa_family == AF_INET6) {
+ so.lsa.sin6.sin6_port = usa.sin6.sin6_port;
+ } else
+#endif
+ {
+ so.lsa.sin.sin_port = usa.sin.sin_port;
+ }
+
+ if ((ptr = (struct socket *)
+ mg_realloc_ctx(phys_ctx->listening_sockets,
+ (phys_ctx->num_listening_sockets + 1)
+ * sizeof(phys_ctx->listening_sockets[0]),
+ phys_ctx))
+ == NULL) {
+
+ mg_cry_ctx_internal(phys_ctx, "%s", "Out of memory");
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ continue;
+ }
+
+ if ((pfd = (struct mg_pollfd *)
+ mg_realloc_ctx(phys_ctx->listening_socket_fds,
+ (phys_ctx->num_listening_sockets + 1)
+ * sizeof(phys_ctx->listening_socket_fds[0]),
+ phys_ctx))
+ == NULL) {
+
+ mg_cry_ctx_internal(phys_ctx, "%s", "Out of memory");
+ closesocket(so.sock);
+ so.sock = INVALID_SOCKET;
+ mg_free(ptr);
+ continue;
+ }
+
+ set_close_on_exec(so.sock, NULL, phys_ctx);
+ phys_ctx->listening_sockets = ptr;
+ phys_ctx->listening_sockets[phys_ctx->num_listening_sockets] = so;
+ phys_ctx->listening_socket_fds = pfd;
+ phys_ctx->num_listening_sockets++;
+ portsOk++;
+ }
+
+ if (portsOk != portsTotal) {
+ close_all_listening_sockets(phys_ctx);
+ portsOk = 0;
+ }
+
+ return portsOk;
+}
+
+
+static const char *
+header_val(const struct mg_connection *conn, const char *header)
+{
+ const char *header_value;
+
+ if ((header_value = mg_get_header(conn, header)) == NULL) {
+ return "-";
+ } else {
+ return header_value;
+ }
+}
+
+
+#if defined(MG_EXTERNAL_FUNCTION_log_access)
+#include "external_log_access.inl"
+#elif !defined(NO_FILESYSTEMS)
+
+static void
+log_access(const struct mg_connection *conn)
+{
+ const struct mg_request_info *ri;
+ struct mg_file fi;
+ char date[64], src_addr[IP_ADDR_STR_LEN];
+#if defined(REENTRANT_TIME)
+ struct tm _tm;
+ struct tm *tm = &_tm;
+#else
+ struct tm *tm;
+#endif
+
+ const char *referer;
+ const char *user_agent;
+
+ char log_buf[4096];
+
+ if (!conn || !conn->dom_ctx) {
+ return;
+ }
+
+ /* Set log message to "empty" */
+ log_buf[0] = 0;
+
+#if defined(USE_LUA)
+ if (conn->phys_ctx->lua_bg_log_available) {
+ int ret;
+ struct mg_context *ctx = conn->phys_ctx;
+ lua_State *lstate = (lua_State *)ctx->lua_background_state;
+ pthread_mutex_lock(&ctx->lua_bg_mutex);
+ /* call "log()" in Lua */
+ lua_getglobal(lstate, "log");
+ prepare_lua_request_info_inner(conn, lstate);
+ push_lua_response_log_data(conn, lstate);
+
+ ret = lua_pcall(lstate, /* args */ 2, /* results */ 1, 0);
+ if (ret == 0) {
+ int t = lua_type(lstate, -1);
+ if (t == LUA_TBOOLEAN) {
+ if (lua_toboolean(lstate, -1) == 0) {
+ /* log() returned false: do not log */
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+ return;
+ }
+ /* log returned true: continue logging */
+ } else if (t == LUA_TSTRING) {
+ size_t len;
+ const char *txt = lua_tolstring(lstate, -1, &len);
+ if ((len == 0) || (*txt == 0)) {
+ /* log() returned empty string: do not log */
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+ return;
+ }
+ /* Copy test from Lua into log_buf */
+ if (len >= sizeof(log_buf)) {
+ len = sizeof(log_buf) - 1;
+ }
+ memcpy(log_buf, txt, len);
+ log_buf[len] = 0;
+ }
+ } else {
+ lua_cry(conn, ret, lstate, "lua_background_script", "log");
+ }
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+ }
+#endif
+
+ if (conn->dom_ctx->config[ACCESS_LOG_FILE] != NULL) {
+ if (mg_fopen(conn,
+ conn->dom_ctx->config[ACCESS_LOG_FILE],
+ MG_FOPEN_MODE_APPEND,
+ &fi)
+ == 0) {
+ fi.access.fp = NULL;
+ }
+ } else {
+ fi.access.fp = NULL;
+ }
+
+ /* Log is written to a file and/or a callback. If both are not set,
+ * executing the rest of the function is pointless. */
+ if ((fi.access.fp == NULL)
+ && (conn->phys_ctx->callbacks.log_access == NULL)) {
+ return;
+ }
+
+ /* If we did not get a log message from Lua, create it here. */
+ if (!log_buf[0]) {
+#if defined(REENTRANT_TIME)
+ localtime_r(&conn->conn_birth_time, tm);
+#else
+ tm = localtime(&conn->conn_birth_time);
+#endif
+ if (tm != NULL) {
+ strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", tm);
+ } else {
+ mg_strlcpy(date, "01/Jan/1970:00:00:00 +0000", sizeof(date));
+ }
+
+ ri = &conn->request_info;
+
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+ referer = header_val(conn, "Referer");
+ user_agent = header_val(conn, "User-Agent");
+
+ mg_snprintf(conn,
+ NULL, /* Ignore truncation in access log */
+ log_buf,
+ sizeof(log_buf),
+ "%s - %s [%s] \"%s %s%s%s HTTP/%s\" %d %" INT64_FMT
+ " %s %s",
+ src_addr,
+ (ri->remote_user == NULL) ? "-" : ri->remote_user,
+ date,
+ ri->request_method ? ri->request_method : "-",
+ ri->request_uri ? ri->request_uri : "-",
+ ri->query_string ? "?" : "",
+ ri->query_string ? ri->query_string : "",
+ ri->http_version,
+ conn->status_code,
+ conn->num_bytes_sent,
+ referer,
+ user_agent);
+ }
+
+ /* Here we have a log message in log_buf. Call the callback */
+ if (conn->phys_ctx->callbacks.log_access) {
+ if (conn->phys_ctx->callbacks.log_access(conn, log_buf)) {
+ /* do not log if callback returns non-zero */
+ if (fi.access.fp) {
+ mg_fclose(&fi.access);
+ }
+ return;
+ }
+ }
+
+ /* Store in file */
+ if (fi.access.fp) {
+ int ok = 1;
+ flockfile(fi.access.fp);
+ if (fprintf(fi.access.fp, "%s\n", log_buf) < 1) {
+ ok = 0;
+ }
+ if (fflush(fi.access.fp) != 0) {
+ ok = 0;
+ }
+ funlockfile(fi.access.fp);
+ if (mg_fclose(&fi.access) != 0) {
+ ok = 0;
+ }
+ if (!ok) {
+ mg_cry_internal(conn,
+ "Error writing log file %s",
+ conn->dom_ctx->config[ACCESS_LOG_FILE]);
+ }
+ }
+}
+#else
+#error "Either enable filesystems or provide a custom log_access implementation"
+#endif /* Externally provided function */
+
+
+/* Verify given socket address against the ACL.
+ * Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
+ */
+static int
+check_acl(struct mg_context *phys_ctx, const union usa *sa)
+{
+ int allowed, flag, matched;
+ struct vec vec;
+
+ if (phys_ctx) {
+ const char *list = phys_ctx->dd.config[ACCESS_CONTROL_LIST];
+
+ /* If any ACL is set, deny by default */
+ allowed = (list == NULL) ? '+' : '-';
+
+ while ((list = next_option(list, &vec, NULL)) != NULL) {
+ flag = vec.ptr[0];
+ matched = -1;
+ if ((vec.len > 0) && ((flag == '+') || (flag == '-'))) {
+ vec.ptr++;
+ vec.len--;
+ matched = parse_match_net(&vec, sa, 1);
+ }
+ if (matched < 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: subnet must be [+|-]IP-addr[/x]",
+ __func__);
+ return -1;
+ }
+ if (matched) {
+ allowed = flag;
+ }
+ }
+
+ return allowed == '+';
+ }
+ return -1;
+}
+
+
+#if !defined(_WIN32) && !defined(__ZEPHYR__)
+static int
+set_uid_option(struct mg_context *phys_ctx)
+{
+ int success = 0;
+
+ if (phys_ctx) {
+ /* We are currently running as curr_uid. */
+ const uid_t curr_uid = getuid();
+ /* If set, we want to run as run_as_user. */
+ const char *run_as_user = phys_ctx->dd.config[RUN_AS_USER];
+ const struct passwd *to_pw = NULL;
+
+ if ((run_as_user != NULL) && (to_pw = getpwnam(run_as_user)) == NULL) {
+ /* run_as_user does not exist on the system. We can't proceed
+ * further. */
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: unknown user [%s]",
+ __func__,
+ run_as_user);
+ } else if ((run_as_user == NULL) || (curr_uid == to_pw->pw_uid)) {
+ /* There was either no request to change user, or we're already
+ * running as run_as_user. Nothing else to do.
+ */
+ success = 1;
+ } else {
+ /* Valid change request. */
+ if (setgid(to_pw->pw_gid) == -1) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: setgid(%s): %s",
+ __func__,
+ run_as_user,
+ strerror(errno));
+ } else if (setgroups(0, NULL) == -1) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: setgroups(): %s",
+ __func__,
+ strerror(errno));
+ } else if (setuid(to_pw->pw_uid) == -1) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: setuid(%s): %s",
+ __func__,
+ run_as_user,
+ strerror(errno));
+ } else {
+ success = 1;
+ }
+ }
+ }
+
+ return success;
+}
+#endif /* !_WIN32 */
+
+
+static void
+tls_dtor(void *key)
+{
+ struct mg_workerTLS *tls = (struct mg_workerTLS *)key;
+ /* key == pthread_getspecific(sTlsKey); */
+
+ if (tls) {
+ if (tls->is_master == 2) {
+ tls->is_master = -3; /* Mark memory as dead */
+ mg_free(tls);
+ }
+ }
+ pthread_setspecific(sTlsKey, NULL);
+}
+
+
+#if defined(USE_MBEDTLS)
+/* Check if SSL is required.
+ * If so, set up ctx->ssl_ctx pointer. */
+static int
+mg_sslctx_init(struct mg_context *phys_ctx, struct mg_domain_context *dom_ctx)
+{
+ if (!phys_ctx) {
+ return 0;
+ }
+
+ if (!dom_ctx) {
+ dom_ctx = &(phys_ctx->dd);
+ }
+
+ if (!is_ssl_port_used(dom_ctx->config[LISTENING_PORTS])) {
+ /* No SSL port is set. No need to setup SSL. */
+ return 1;
+ }
+
+ dom_ctx->ssl_ctx = (SSL_CTX *)mg_calloc(1, sizeof(*dom_ctx->ssl_ctx));
+ if (dom_ctx->ssl_ctx == NULL) {
+ fprintf(stderr, "ssl_ctx malloc failed\n");
+ return 0;
+ }
+
+ return mbed_sslctx_init(dom_ctx->ssl_ctx, dom_ctx->config[SSL_CERTIFICATE])
+ == 0
+ ? 1
+ : 0;
+}
+
+#elif !defined(NO_SSL)
+
+static int ssl_use_pem_file(struct mg_context *phys_ctx,
+ struct mg_domain_context *dom_ctx,
+ const char *pem,
+ const char *chain);
+static const char *ssl_error(void);
+
+
+static int
+refresh_trust(struct mg_connection *conn)
+{
+ struct stat cert_buf;
+ int64_t t = 0;
+ const char *pem;
+ const char *chain;
+ int should_verify_peer;
+
+ if ((pem = conn->dom_ctx->config[SSL_CERTIFICATE]) == NULL) {
+ /* If pem is NULL and conn->phys_ctx->callbacks.init_ssl is not,
+ * refresh_trust still can not work. */
+ return 0;
+ }
+ chain = conn->dom_ctx->config[SSL_CERTIFICATE_CHAIN];
+ if (chain == NULL) {
+ /* pem is not NULL here */
+ chain = pem;
+ }
+ if (*chain == 0) {
+ chain = NULL;
+ }
+
+ if (stat(pem, &cert_buf) != -1) {
+ t = (int64_t)cert_buf.st_mtime;
+ }
+
+ mg_lock_context(conn->phys_ctx);
+ if ((t != 0) && (conn->dom_ctx->ssl_cert_last_mtime != t)) {
+ conn->dom_ctx->ssl_cert_last_mtime = t;
+
+ should_verify_peer = 0;
+ if (conn->dom_ctx->config[SSL_DO_VERIFY_PEER] != NULL) {
+ if (mg_strcasecmp(conn->dom_ctx->config[SSL_DO_VERIFY_PEER], "yes")
+ == 0) {
+ should_verify_peer = 1;
+ } else if (mg_strcasecmp(conn->dom_ctx->config[SSL_DO_VERIFY_PEER],
+ "optional")
+ == 0) {
+ should_verify_peer = 1;
+ }
+ }
+
+ if (should_verify_peer) {
+ char *ca_path = conn->dom_ctx->config[SSL_CA_PATH];
+ char *ca_file = conn->dom_ctx->config[SSL_CA_FILE];
+ if (SSL_CTX_load_verify_locations(conn->dom_ctx->ssl_ctx,
+ ca_file,
+ ca_path)
+ != 1) {
+ mg_unlock_context(conn->phys_ctx);
+ mg_cry_ctx_internal(
+ conn->phys_ctx,
+ "SSL_CTX_load_verify_locations error: %s "
+ "ssl_verify_peer requires setting "
+ "either ssl_ca_path or ssl_ca_file. Is any of them "
+ "present in "
+ "the .conf file?",
+ ssl_error());
+ return 0;
+ }
+ }
+
+ if (ssl_use_pem_file(conn->phys_ctx, conn->dom_ctx, pem, chain) == 0) {
+ mg_unlock_context(conn->phys_ctx);
+ return 0;
+ }
+ }
+ mg_unlock_context(conn->phys_ctx);
+
+ return 1;
+}
+
+#if defined(OPENSSL_API_1_1)
+#else
+static pthread_mutex_t *ssl_mutexes;
+#endif /* OPENSSL_API_1_1 */
+
+static int
+sslize(struct mg_connection *conn,
+ int (*func)(SSL *),
+ const struct mg_client_options *client_options)
+{
+ int ret, err;
+ int short_trust;
+ unsigned timeout = 1024;
+ unsigned i;
+
+ if (!conn) {
+ return 0;
+ }
+
+ short_trust =
+ (conn->dom_ctx->config[SSL_SHORT_TRUST] != NULL)
+ && (mg_strcasecmp(conn->dom_ctx->config[SSL_SHORT_TRUST], "yes") == 0);
+
+ if (short_trust) {
+ int trust_ret = refresh_trust(conn);
+ if (!trust_ret) {
+ return trust_ret;
+ }
+ }
+
+ mg_lock_context(conn->phys_ctx);
+ conn->ssl = SSL_new(conn->dom_ctx->ssl_ctx);
+ mg_unlock_context(conn->phys_ctx);
+ if (conn->ssl == NULL) {
+ mg_cry_internal(conn, "sslize error: %s", ssl_error());
+ OPENSSL_REMOVE_THREAD_STATE();
+ return 0;
+ }
+ SSL_set_app_data(conn->ssl, (char *)conn);
+
+ ret = SSL_set_fd(conn->ssl, conn->client.sock);
+ if (ret != 1) {
+ mg_cry_internal(conn, "sslize error: %s", ssl_error());
+ SSL_free(conn->ssl);
+ conn->ssl = NULL;
+ OPENSSL_REMOVE_THREAD_STATE();
+ return 0;
+ }
+
+ if (client_options) {
+ if (client_options->host_name) {
+ SSL_set_tlsext_host_name(conn->ssl, client_options->host_name);
+ }
+ }
+
+ /* Reuse the request timeout for the SSL_Accept/SSL_connect timeout */
+ if (conn->dom_ctx->config[REQUEST_TIMEOUT]) {
+ /* NOTE: The loop below acts as a back-off, so we can end
+ * up sleeping for more (or less) than the REQUEST_TIMEOUT. */
+ int to = atoi(conn->dom_ctx->config[REQUEST_TIMEOUT]);
+ if (to >= 0) {
+ timeout = (unsigned)to;
+ }
+ }
+
+ /* SSL functions may fail and require to be called again:
+ * see https://www.openssl.org/docs/manmaster/ssl/SSL_get_error.html
+ * Here "func" could be SSL_connect or SSL_accept. */
+ for (i = 0; i <= timeout; i += 50) {
+ ERR_clear_error();
+ /* conn->dom_ctx may be changed here (see ssl_servername_callback) */
+ ret = func(conn->ssl);
+ if (ret != 1) {
+ err = SSL_get_error(conn->ssl, ret);
+ if ((err == SSL_ERROR_WANT_CONNECT)
+ || (err == SSL_ERROR_WANT_ACCEPT)
+ || (err == SSL_ERROR_WANT_READ) || (err == SSL_ERROR_WANT_WRITE)
+ || (err == SSL_ERROR_WANT_X509_LOOKUP)) {
+ if (!STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)) {
+ /* Don't wait if the server is going to be stopped. */
+ break;
+ }
+ if (err == SSL_ERROR_WANT_X509_LOOKUP) {
+ /* Simply retry the function call. */
+ mg_sleep(50);
+ } else {
+ /* Need to retry the function call "later".
+ * See https://linux.die.net/man/3/ssl_get_error
+ * This is typical for non-blocking sockets. */
+ struct mg_pollfd pfd;
+ int pollres;
+ pfd.fd = conn->client.sock;
+ pfd.events = ((err == SSL_ERROR_WANT_CONNECT)
+ || (err == SSL_ERROR_WANT_WRITE))
+ ? POLLOUT
+ : POLLIN;
+ pollres =
+ mg_poll(&pfd, 1, 50, &(conn->phys_ctx->stop_flag));
+ if (pollres < 0) {
+ /* Break if error occurred (-1)
+ * or server shutdown (-2) */
+ break;
+ }
+ }
+
+ } else if (err == SSL_ERROR_SYSCALL) {
+ /* This is an IO error. Look at errno. */
+ mg_cry_internal(conn, "SSL syscall error %i", ERRNO);
+ break;
+
+ } else {
+ /* This is an SSL specific error, e.g. SSL_ERROR_SSL */
+ mg_cry_internal(conn, "sslize error: %s", ssl_error());
+ break;
+ }
+
+ } else {
+ /* success */
+ break;
+ }
+ }
+ ERR_clear_error();
+
+ if (ret != 1) {
+ SSL_free(conn->ssl);
+ conn->ssl = NULL;
+ OPENSSL_REMOVE_THREAD_STATE();
+ return 0;
+ }
+
+ return 1;
+}
+
+
+/* Return OpenSSL error message (from CRYPTO lib) */
+static const char *
+ssl_error(void)
+{
+ unsigned long err;
+ err = ERR_get_error();
+ return ((err == 0) ? "" : ERR_error_string(err, NULL));
+}
+
+
+static int
+hexdump2string(void *mem, int memlen, char *buf, int buflen)
+{
+ int i;
+ const char hexdigit[] = "0123456789abcdef";
+
+ if ((memlen <= 0) || (buflen <= 0)) {
+ return 0;
+ }
+ if (buflen < (3 * memlen)) {
+ return 0;
+ }
+
+ for (i = 0; i < memlen; i++) {
+ if (i > 0) {
+ buf[3 * i - 1] = ' ';
+ }
+ buf[3 * i] = hexdigit[(((uint8_t *)mem)[i] >> 4) & 0xF];
+ buf[3 * i + 1] = hexdigit[((uint8_t *)mem)[i] & 0xF];
+ }
+ buf[3 * memlen - 1] = 0;
+
+ return 1;
+}
+
+
+static int
+ssl_get_client_cert_info(const struct mg_connection *conn,
+ struct mg_client_cert *client_cert)
+{
+ X509 *cert = SSL_get_peer_certificate(conn->ssl);
+ if (cert) {
+ char str_buf[1024];
+ unsigned char buf[256];
+ char *str_serial = NULL;
+ unsigned int ulen;
+ int ilen;
+ unsigned char *tmp_buf;
+ unsigned char *tmp_p;
+
+ /* Handle to algorithm used for fingerprint */
+ const EVP_MD *digest = EVP_get_digestbyname("sha1");
+
+ /* Get Subject and issuer */
+ X509_NAME *subj = X509_get_subject_name(cert);
+ X509_NAME *iss = X509_get_issuer_name(cert);
+
+ /* Get serial number */
+ ASN1_INTEGER *serial = X509_get_serialNumber(cert);
+
+ /* Translate serial number to a hex string */
+ BIGNUM *serial_bn = ASN1_INTEGER_to_BN(serial, NULL);
+ if (serial_bn) {
+ str_serial = BN_bn2hex(serial_bn);
+ BN_free(serial_bn);
+ }
+ client_cert->serial =
+ str_serial ? mg_strdup_ctx(str_serial, conn->phys_ctx) : NULL;
+
+ /* Translate subject and issuer to a string */
+ (void)X509_NAME_oneline(subj, str_buf, (int)sizeof(str_buf));
+ client_cert->subject = mg_strdup_ctx(str_buf, conn->phys_ctx);
+ (void)X509_NAME_oneline(iss, str_buf, (int)sizeof(str_buf));
+ client_cert->issuer = mg_strdup_ctx(str_buf, conn->phys_ctx);
+
+ /* Calculate SHA1 fingerprint and store as a hex string */
+ ulen = 0;
+
+ /* ASN1_digest is deprecated. Do the calculation manually,
+ * using EVP_Digest. */
+ ilen = i2d_X509(cert, NULL);
+ tmp_buf = (ilen > 0)
+ ? (unsigned char *)mg_malloc_ctx((unsigned)ilen + 1,
+ conn->phys_ctx)
+ : NULL;
+ if (tmp_buf) {
+ tmp_p = tmp_buf;
+ (void)i2d_X509(cert, &tmp_p);
+ if (!EVP_Digest(
+ tmp_buf, (unsigned)ilen, buf, &ulen, digest, NULL)) {
+ ulen = 0;
+ }
+ mg_free(tmp_buf);
+ }
+
+ if (!hexdump2string(buf, (int)ulen, str_buf, (int)sizeof(str_buf))) {
+ *str_buf = 0;
+ }
+ client_cert->finger = mg_strdup_ctx(str_buf, conn->phys_ctx);
+
+ client_cert->peer_cert = (void *)cert;
+
+ /* Strings returned from bn_bn2hex must be freed using OPENSSL_free,
+ * see https://linux.die.net/man/3/bn_bn2hex */
+ OPENSSL_free(str_serial);
+ return 1;
+ }
+ return 0;
+}
+
+
+#if defined(OPENSSL_API_1_1)
+#else
+static void
+ssl_locking_callback(int mode, int mutex_num, const char *file, int line)
+{
+ (void)line;
+ (void)file;
+
+ if (mode & 1) {
+ /* 1 is CRYPTO_LOCK */
+ (void)pthread_mutex_lock(&ssl_mutexes[mutex_num]);
+ } else {
+ (void)pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
+ }
+}
+#endif /* OPENSSL_API_1_1 */
+
+
+#if !defined(NO_SSL_DL)
+/* Load a DLL/Shared Object with a TLS/SSL implementation. */
+static void *
+load_tls_dll(char *ebuf,
+ size_t ebuf_len,
+ const char *dll_name,
+ struct ssl_func *sw,
+ int *feature_missing)
+{
+ union {
+ void *p;
+ void (*fp)(void);
+ } u;
+ void *dll_handle;
+ struct ssl_func *fp;
+ int ok;
+ int truncated = 0;
+
+ if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s: cannot load %s",
+ __func__,
+ dll_name);
+ return NULL;
+ }
+
+ ok = 1;
+ for (fp = sw; fp->name != NULL; fp++) {
+#if defined(_WIN32)
+ /* GetProcAddress() returns pointer to function */
+ u.fp = (void (*)(void))dlsym(dll_handle, fp->name);
+#else
+ /* dlsym() on UNIX returns void *. ISO C forbids casts of data
+ * pointers to function pointers. We need to use a union to make a
+ * cast. */
+ u.p = dlsym(dll_handle, fp->name);
+#endif /* _WIN32 */
+
+ /* Set pointer (might be NULL) */
+ fp->ptr = u.fp;
+
+ if (u.fp == NULL) {
+ DEBUG_TRACE("Missing function: %s\n", fp->name);
+ if (feature_missing) {
+ feature_missing[fp->required]++;
+ }
+ if (fp->required == TLS_Mandatory) {
+ /* Mandatory function is missing */
+ if (ok) {
+ /* This is the first missing function.
+ * Create a new error message. */
+ mg_snprintf(NULL,
+ &truncated,
+ ebuf,
+ ebuf_len,
+ "%s: %s: cannot find %s",
+ __func__,
+ dll_name,
+ fp->name);
+ ok = 0;
+ } else {
+ /* This is yet anothermissing function.
+ * Append existing error message. */
+ size_t cur_len = strlen(ebuf);
+ if (!truncated && ((ebuf_len - cur_len) > 3)) {
+ mg_snprintf(NULL,
+ &truncated,
+ ebuf + cur_len,
+ ebuf_len - cur_len - 3,
+ ", %s",
+ fp->name);
+ if (truncated) {
+ /* If truncated, add "..." */
+ strcat(ebuf, "...");
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if (!ok) {
+ (void)dlclose(dll_handle);
+ return NULL;
+ }
+
+ return dll_handle;
+}
+
+
+static void *ssllib_dll_handle; /* Store the ssl library handle. */
+static void *cryptolib_dll_handle; /* Store the crypto library handle. */
+
+#endif /* NO_SSL_DL */
+
+
+#if defined(SSL_ALREADY_INITIALIZED)
+static volatile ptrdiff_t cryptolib_users =
+ 1; /* Reference counter for crypto library. */
+#else
+static volatile ptrdiff_t cryptolib_users =
+ 0; /* Reference counter for crypto library. */
+#endif
+
+
+static int
+initialize_openssl(char *ebuf, size_t ebuf_len)
+{
+#if !defined(OPENSSL_API_1_1) && !defined(OPENSSL_API_3_0)
+ int i, num_locks;
+ size_t size;
+#endif
+
+ if (ebuf_len > 0) {
+ ebuf[0] = 0;
+ }
+
+#if !defined(NO_SSL_DL)
+ if (!cryptolib_dll_handle) {
+ memset(tls_feature_missing, 0, sizeof(tls_feature_missing));
+ cryptolib_dll_handle = load_tls_dll(
+ ebuf, ebuf_len, CRYPTO_LIB, crypto_sw, tls_feature_missing);
+ if (!cryptolib_dll_handle) {
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s: error loading library %s",
+ __func__,
+ CRYPTO_LIB);
+ DEBUG_TRACE("%s", ebuf);
+ return 0;
+ }
+ }
+#endif /* NO_SSL_DL */
+
+ if (mg_atomic_inc(&cryptolib_users) > 1) {
+ return 1;
+ }
+
+#if !defined(OPENSSL_API_1_1) && !defined(OPENSSL_API_3_0)
+ /* Initialize locking callbacks, needed for thread safety.
+ * http://www.openssl.org/support/faq.html#PROG1
+ */
+ num_locks = CRYPTO_num_locks();
+ if (num_locks < 0) {
+ num_locks = 0;
+ }
+ size = sizeof(pthread_mutex_t) * ((size_t)(num_locks));
+
+ /* allocate mutex array, if required */
+ if (num_locks == 0) {
+ /* No mutex array required */
+ ssl_mutexes = NULL;
+ } else {
+ /* Mutex array required - allocate it */
+ ssl_mutexes = (pthread_mutex_t *)mg_malloc(size);
+
+ /* Check OOM */
+ if (ssl_mutexes == NULL) {
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s: cannot allocate mutexes: %s",
+ __func__,
+ ssl_error());
+ DEBUG_TRACE("%s", ebuf);
+ return 0;
+ }
+
+ /* initialize mutex array */
+ for (i = 0; i < num_locks; i++) {
+ if (0 != pthread_mutex_init(&ssl_mutexes[i], &pthread_mutex_attr)) {
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s: error initializing mutex %i of %i",
+ __func__,
+ i,
+ num_locks);
+ DEBUG_TRACE("%s", ebuf);
+ mg_free(ssl_mutexes);
+ return 0;
+ }
+ }
+ }
+
+ CRYPTO_set_locking_callback(&ssl_locking_callback);
+ CRYPTO_set_id_callback(&mg_current_thread_id);
+#endif /* OPENSSL_API_1_1 || OPENSSL_API_3_0 */
+
+#if !defined(NO_SSL_DL)
+ if (!ssllib_dll_handle) {
+ ssllib_dll_handle =
+ load_tls_dll(ebuf, ebuf_len, SSL_LIB, ssl_sw, tls_feature_missing);
+ if (!ssllib_dll_handle) {
+#if !defined(OPENSSL_API_1_1)
+ mg_free(ssl_mutexes);
+#endif
+ DEBUG_TRACE("%s", ebuf);
+ return 0;
+ }
+ }
+#endif /* NO_SSL_DL */
+
+#if (defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)) \
+ && !defined(NO_SSL_DL)
+ /* Initialize SSL library */
+ OPENSSL_init_ssl(0, NULL);
+ OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS
+ | OPENSSL_INIT_LOAD_CRYPTO_STRINGS,
+ NULL);
+#else
+ /* Initialize SSL library */
+ SSL_library_init();
+ SSL_load_error_strings();
+#endif
+
+ return 1;
+}
+
+
+static int
+ssl_use_pem_file(struct mg_context *phys_ctx,
+ struct mg_domain_context *dom_ctx,
+ const char *pem,
+ const char *chain)
+{
+ if (SSL_CTX_use_certificate_file(dom_ctx->ssl_ctx, pem, 1) == 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: cannot open certificate file %s: %s",
+ __func__,
+ pem,
+ ssl_error());
+ return 0;
+ }
+
+ /* could use SSL_CTX_set_default_passwd_cb_userdata */
+ if (SSL_CTX_use_PrivateKey_file(dom_ctx->ssl_ctx, pem, 1) == 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: cannot open private key file %s: %s",
+ __func__,
+ pem,
+ ssl_error());
+ return 0;
+ }
+
+ if (SSL_CTX_check_private_key(dom_ctx->ssl_ctx) == 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: certificate and private key do not match: %s",
+ __func__,
+ pem);
+ return 0;
+ }
+
+ /* In contrast to OpenSSL, wolfSSL does not support certificate
+ * chain files that contain private keys and certificates in
+ * SSL_CTX_use_certificate_chain_file.
+ * The CivetWeb-Server used pem-Files that contained both information.
+ * In order to make wolfSSL work, it is split in two files.
+ * One file that contains key and certificate used by the server and
+ * an optional chain file for the ssl stack.
+ */
+ if (chain) {
+ if (SSL_CTX_use_certificate_chain_file(dom_ctx->ssl_ctx, chain) == 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "%s: cannot use certificate chain file %s: %s",
+ __func__,
+ chain,
+ ssl_error());
+ return 0;
+ }
+ }
+ return 1;
+}
+
+
+#if defined(OPENSSL_API_1_1)
+static unsigned long
+ssl_get_protocol(int version_id)
+{
+ long unsigned ret = (long unsigned)SSL_OP_ALL;
+ if (version_id > 0)
+ ret |= SSL_OP_NO_SSLv2;
+ if (version_id > 1)
+ ret |= SSL_OP_NO_SSLv3;
+ if (version_id > 2)
+ ret |= SSL_OP_NO_TLSv1;
+ if (version_id > 3)
+ ret |= SSL_OP_NO_TLSv1_1;
+ if (version_id > 4)
+ ret |= SSL_OP_NO_TLSv1_2;
+#if defined(SSL_OP_NO_TLSv1_3)
+ if (version_id > 5)
+ ret |= SSL_OP_NO_TLSv1_3;
+#endif
+ return ret;
+}
+#else
+static long
+ssl_get_protocol(int version_id)
+{
+ unsigned long ret = (unsigned long)SSL_OP_ALL;
+ if (version_id > 0)
+ ret |= SSL_OP_NO_SSLv2;
+ if (version_id > 1)
+ ret |= SSL_OP_NO_SSLv3;
+ if (version_id > 2)
+ ret |= SSL_OP_NO_TLSv1;
+ if (version_id > 3)
+ ret |= SSL_OP_NO_TLSv1_1;
+ if (version_id > 4)
+ ret |= SSL_OP_NO_TLSv1_2;
+#if defined(SSL_OP_NO_TLSv1_3)
+ if (version_id > 5)
+ ret |= SSL_OP_NO_TLSv1_3;
+#endif
+ return (long)ret;
+}
+#endif /* OPENSSL_API_1_1 */
+
+
+/* SSL callback documentation:
+ * https://www.openssl.org/docs/man1.1.0/ssl/SSL_set_info_callback.html
+ * https://wiki.openssl.org/index.php/Manual:SSL_CTX_set_info_callback(3)
+ * https://linux.die.net/man/3/ssl_set_info_callback */
+/* Note: There is no "const" for the first argument in the documentation
+ * examples, however some (maybe most, but not all) headers of OpenSSL
+ * versions / OpenSSL compatibility layers have it. Having a different
+ * definition will cause a warning in C and an error in C++. Use "const SSL
+ * *", while automatic conversion from "SSL *" works for all compilers,
+ * but not other way around */
+static void
+ssl_info_callback(const SSL *ssl, int what, int ret)
+{
+ (void)ret;
+
+ if (what & SSL_CB_HANDSHAKE_START) {
+ SSL_get_app_data(ssl);
+ }
+ if (what & SSL_CB_HANDSHAKE_DONE) {
+ /* TODO: check for openSSL 1.1 */
+ //#define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
+ // ssl->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS;
+ }
+}
+
+
+static int
+ssl_servername_callback(SSL *ssl, int *ad, void *arg)
+{
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-align"
+#endif /* defined(GCC_DIAGNOSTIC) */
+
+ /* We used an aligned pointer in SSL_set_app_data */
+ struct mg_connection *conn = (struct mg_connection *)SSL_get_app_data(ssl);
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif /* defined(GCC_DIAGNOSTIC) */
+
+ const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
+
+ (void)ad;
+ (void)arg;
+
+ if ((conn == NULL) || (conn->phys_ctx == NULL)) {
+ DEBUG_ASSERT(0);
+ return SSL_TLSEXT_ERR_NOACK;
+ }
+ conn->dom_ctx = &(conn->phys_ctx->dd);
+
+ /* Old clients (Win XP) will not support SNI. Then, there
+ * is no server name available in the request - we can
+ * only work with the default certificate.
+ * Multiple HTTPS hosts on one IP+port are only possible
+ * with a certificate containing all alternative names.
+ */
+ if ((servername == NULL) || (*servername == 0)) {
+ DEBUG_TRACE("%s", "SSL connection not supporting SNI");
+ mg_lock_context(conn->phys_ctx);
+ SSL_set_SSL_CTX(ssl, conn->dom_ctx->ssl_ctx);
+ mg_unlock_context(conn->phys_ctx);
+ return SSL_TLSEXT_ERR_NOACK;
+ }
+
+ DEBUG_TRACE("TLS connection to host %s", servername);
+
+ while (conn->dom_ctx) {
+ if (!mg_strcasecmp(servername,
+ conn->dom_ctx->config[AUTHENTICATION_DOMAIN])) {
+ /* Found matching domain */
+ DEBUG_TRACE("TLS domain %s found",
+ conn->dom_ctx->config[AUTHENTICATION_DOMAIN]);
+ break;
+ }
+ mg_lock_context(conn->phys_ctx);
+ conn->dom_ctx = conn->dom_ctx->next;
+ mg_unlock_context(conn->phys_ctx);
+ }
+
+ if (conn->dom_ctx == NULL) {
+ /* Default domain */
+ DEBUG_TRACE("TLS default domain %s used",
+ conn->phys_ctx->dd.config[AUTHENTICATION_DOMAIN]);
+ conn->dom_ctx = &(conn->phys_ctx->dd);
+ }
+ mg_lock_context(conn->phys_ctx);
+ SSL_set_SSL_CTX(ssl, conn->dom_ctx->ssl_ctx);
+ mg_unlock_context(conn->phys_ctx);
+ return SSL_TLSEXT_ERR_OK;
+}
+
+
+#if defined(USE_ALPN)
+static const char alpn_proto_list[] = "\x02h2\x08http/1.1\x08http/1.0";
+static const char *alpn_proto_order_http1[] = {alpn_proto_list + 3,
+ alpn_proto_list + 3 + 8,
+ NULL};
+#if defined(USE_HTTP2)
+static const char *alpn_proto_order_http2[] = {alpn_proto_list,
+ alpn_proto_list + 3,
+ alpn_proto_list + 3 + 8,
+ NULL};
+#endif
+
+static int
+alpn_select_cb(SSL *ssl,
+ const unsigned char **out,
+ unsigned char *outlen,
+ const unsigned char *in,
+ unsigned int inlen,
+ void *arg)
+{
+ struct mg_domain_context *dom_ctx = (struct mg_domain_context *)arg;
+ unsigned int i, j, enable_http2 = 0;
+ const char **alpn_proto_order = alpn_proto_order_http1;
+
+ struct mg_workerTLS *tls =
+ (struct mg_workerTLS *)pthread_getspecific(sTlsKey);
+
+ (void)ssl;
+
+ if (tls == NULL) {
+ /* Need to store protocol in Thread Local Storage */
+ /* If there is no Thread Local Storage, don't use ALPN */
+ return SSL_TLSEXT_ERR_NOACK;
+ }
+
+#if defined(USE_HTTP2)
+ enable_http2 = (0 == strcmp(dom_ctx->config[ENABLE_HTTP2], "yes"));
+ if (enable_http2) {
+ alpn_proto_order = alpn_proto_order_http2;
+ }
+#endif
+
+ for (j = 0; alpn_proto_order[j] != NULL; j++) {
+ /* check all accepted protocols in this order */
+ const char *alpn_proto = alpn_proto_order[j];
+ /* search input for matching protocol */
+ for (i = 0; i < inlen; i++) {
+ if (!memcmp(in + i, alpn_proto, (unsigned char)alpn_proto[0])) {
+ *out = in + i + 1;
+ *outlen = in[i];
+ tls->alpn_proto = alpn_proto;
+ return SSL_TLSEXT_ERR_OK;
+ }
+ }
+ }
+
+ /* Nothing found */
+ return SSL_TLSEXT_ERR_NOACK;
+}
+
+
+static int
+next_protos_advertised_cb(SSL *ssl,
+ const unsigned char **data,
+ unsigned int *len,
+ void *arg)
+{
+ struct mg_domain_context *dom_ctx = (struct mg_domain_context *)arg;
+ *data = (const unsigned char *)alpn_proto_list;
+ *len = (unsigned int)strlen((const char *)data);
+
+ (void)ssl;
+ (void)dom_ctx;
+
+ return SSL_TLSEXT_ERR_OK;
+}
+
+
+static int
+init_alpn(struct mg_context *phys_ctx, struct mg_domain_context *dom_ctx)
+{
+ unsigned int alpn_len = (unsigned int)strlen((char *)alpn_proto_list);
+ int ret = SSL_CTX_set_alpn_protos(dom_ctx->ssl_ctx,
+ (const unsigned char *)alpn_proto_list,
+ alpn_len);
+ if (ret != 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_set_alpn_protos error: %s",
+ ssl_error());
+ }
+
+ SSL_CTX_set_alpn_select_cb(dom_ctx->ssl_ctx,
+ alpn_select_cb,
+ (void *)dom_ctx);
+
+ SSL_CTX_set_next_protos_advertised_cb(dom_ctx->ssl_ctx,
+ next_protos_advertised_cb,
+ (void *)dom_ctx);
+
+ return ret;
+}
+#endif
+
+
+/* Setup SSL CTX as required by CivetWeb */
+static int
+init_ssl_ctx_impl(struct mg_context *phys_ctx,
+ struct mg_domain_context *dom_ctx,
+ const char *pem,
+ const char *chain)
+{
+ int callback_ret;
+ int should_verify_peer;
+ int peer_certificate_optional;
+ const char *ca_path;
+ const char *ca_file;
+ int use_default_verify_paths;
+ int verify_depth;
+ struct timespec now_mt;
+ md5_byte_t ssl_context_id[16];
+ md5_state_t md5state;
+ int protocol_ver;
+ int ssl_cache_timeout;
+
+#if (defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)) \
+ && !defined(NO_SSL_DL)
+ if ((dom_ctx->ssl_ctx = SSL_CTX_new(TLS_server_method())) == NULL) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_new (server) error: %s",
+ ssl_error());
+ return 0;
+ }
+#else
+ if ((dom_ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_new (server) error: %s",
+ ssl_error());
+ return 0;
+ }
+#endif /* OPENSSL_API_1_1 || OPENSSL_API_3_0 */
+
+#if defined(SSL_OP_NO_TLSv1_3)
+ SSL_CTX_clear_options(dom_ctx->ssl_ctx,
+ SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1
+ | SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2
+ | SSL_OP_NO_TLSv1_3);
+#else
+ SSL_CTX_clear_options(dom_ctx->ssl_ctx,
+ SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1
+ | SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2);
+#endif
+
+ protocol_ver = atoi(dom_ctx->config[SSL_PROTOCOL_VERSION]);
+ SSL_CTX_set_options(dom_ctx->ssl_ctx, ssl_get_protocol(protocol_ver));
+ SSL_CTX_set_options(dom_ctx->ssl_ctx, SSL_OP_SINGLE_DH_USE);
+ SSL_CTX_set_options(dom_ctx->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
+ SSL_CTX_set_options(dom_ctx->ssl_ctx,
+ SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION);
+ SSL_CTX_set_options(dom_ctx->ssl_ctx, SSL_OP_NO_COMPRESSION);
+
+#if defined(SSL_OP_NO_RENEGOTIATION)
+ SSL_CTX_set_options(dom_ctx->ssl_ctx, SSL_OP_NO_RENEGOTIATION);
+#endif
+
+#if !defined(NO_SSL_DL)
+ SSL_CTX_set_ecdh_auto(dom_ctx->ssl_ctx, 1);
+#endif /* NO_SSL_DL */
+
+ /* In SSL documentation examples callback defined without const
+ * specifier 'void (*)(SSL *, int, int)' See:
+ * https://www.openssl.org/docs/man1.0.2/ssl/ssl.html
+ * https://www.openssl.org/docs/man1.1.0/ssl/ssl.html
+ * But in the source code const SSL is used:
+ * 'void (*)(const SSL *, int, int)' See:
+ * https://github.com/openssl/openssl/blob/1d97c8435171a7af575f73c526d79e1ef0ee5960/ssl/ssl.h#L1173
+ * Problem about wrong documentation described, but not resolved:
+ * https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1147526
+ * Wrong const cast ignored on C or can be suppressed by compiler flags.
+ * But when compiled with modern C++ compiler, correct const should be
+ * provided
+ */
+ SSL_CTX_set_info_callback(dom_ctx->ssl_ctx, ssl_info_callback);
+
+ SSL_CTX_set_tlsext_servername_callback(dom_ctx->ssl_ctx,
+ ssl_servername_callback);
+
+ /* If a callback has been specified, call it. */
+ callback_ret = (phys_ctx->callbacks.init_ssl == NULL)
+ ? 0
+ : (phys_ctx->callbacks.init_ssl(dom_ctx->ssl_ctx,
+ phys_ctx->user_data));
+
+ /* If callback returns 0, civetweb sets up the SSL certificate.
+ * If it returns 1, civetweb assumes the callback already did this.
+ * If it returns -1, initializing ssl fails. */
+ if (callback_ret < 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL callback returned error: %i",
+ callback_ret);
+ return 0;
+ }
+ if (callback_ret > 0) {
+ /* Callback did everything. */
+ return 1;
+ }
+
+ /* If a domain callback has been specified, call it. */
+ callback_ret = (phys_ctx->callbacks.init_ssl_domain == NULL)
+ ? 0
+ : (phys_ctx->callbacks.init_ssl_domain(
+ dom_ctx->config[AUTHENTICATION_DOMAIN],
+ dom_ctx->ssl_ctx,
+ phys_ctx->user_data));
+
+ /* If domain callback returns 0, civetweb sets up the SSL certificate.
+ * If it returns 1, civetweb assumes the callback already did this.
+ * If it returns -1, initializing ssl fails. */
+ if (callback_ret < 0) {
+ mg_cry_ctx_internal(phys_ctx,
+ "Domain SSL callback returned error: %i",
+ callback_ret);
+ return 0;
+ }
+ if (callback_ret > 0) {
+ /* Domain callback did everything. */
+ return 1;
+ }
+
+ /* Use some combination of start time, domain and port as a SSL
+ * context ID. This should be unique on the current machine. */
+ md5_init(&md5state);
+ clock_gettime(CLOCK_MONOTONIC, &now_mt);
+ md5_append(&md5state, (const md5_byte_t *)&now_mt, sizeof(now_mt));
+ md5_append(&md5state,
+ (const md5_byte_t *)phys_ctx->dd.config[LISTENING_PORTS],
+ strlen(phys_ctx->dd.config[LISTENING_PORTS]));
+ md5_append(&md5state,
+ (const md5_byte_t *)dom_ctx->config[AUTHENTICATION_DOMAIN],
+ strlen(dom_ctx->config[AUTHENTICATION_DOMAIN]));
+ md5_append(&md5state, (const md5_byte_t *)phys_ctx, sizeof(*phys_ctx));
+ md5_append(&md5state, (const md5_byte_t *)dom_ctx, sizeof(*dom_ctx));
+ md5_finish(&md5state, ssl_context_id);
+
+ SSL_CTX_set_session_id_context(dom_ctx->ssl_ctx,
+ (unsigned char *)ssl_context_id,
+ sizeof(ssl_context_id));
+
+ if (pem != NULL) {
+ if (!ssl_use_pem_file(phys_ctx, dom_ctx, pem, chain)) {
+ return 0;
+ }
+ }
+
+ /* Should we support client certificates? */
+ /* Default is "no". */
+ should_verify_peer = 0;
+ peer_certificate_optional = 0;
+ if (dom_ctx->config[SSL_DO_VERIFY_PEER] != NULL) {
+ if (mg_strcasecmp(dom_ctx->config[SSL_DO_VERIFY_PEER], "yes") == 0) {
+ /* Yes, they are mandatory */
+ should_verify_peer = 1;
+ } else if (mg_strcasecmp(dom_ctx->config[SSL_DO_VERIFY_PEER],
+ "optional")
+ == 0) {
+ /* Yes, they are optional */
+ should_verify_peer = 1;
+ peer_certificate_optional = 1;
+ }
+ }
+
+ use_default_verify_paths =
+ (dom_ctx->config[SSL_DEFAULT_VERIFY_PATHS] != NULL)
+ && (mg_strcasecmp(dom_ctx->config[SSL_DEFAULT_VERIFY_PATHS], "yes")
+ == 0);
+
+ if (should_verify_peer) {
+ ca_path = dom_ctx->config[SSL_CA_PATH];
+ ca_file = dom_ctx->config[SSL_CA_FILE];
+ if (SSL_CTX_load_verify_locations(dom_ctx->ssl_ctx, ca_file, ca_path)
+ != 1) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_load_verify_locations error: %s "
+ "ssl_verify_peer requires setting "
+ "either ssl_ca_path or ssl_ca_file. "
+ "Is any of them present in the "
+ ".conf file?",
+ ssl_error());
+ return 0;
+ }
+
+ if (peer_certificate_optional) {
+ SSL_CTX_set_verify(dom_ctx->ssl_ctx, SSL_VERIFY_PEER, NULL);
+ } else {
+ SSL_CTX_set_verify(dom_ctx->ssl_ctx,
+ SSL_VERIFY_PEER
+ | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
+ NULL);
+ }
+
+ if (use_default_verify_paths
+ && (SSL_CTX_set_default_verify_paths(dom_ctx->ssl_ctx) != 1)) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_set_default_verify_paths error: %s",
+ ssl_error());
+ return 0;
+ }
+
+ if (dom_ctx->config[SSL_VERIFY_DEPTH]) {
+ verify_depth = atoi(dom_ctx->config[SSL_VERIFY_DEPTH]);
+ SSL_CTX_set_verify_depth(dom_ctx->ssl_ctx, verify_depth);
+ }
+ }
+
+ if (dom_ctx->config[SSL_CIPHER_LIST] != NULL) {
+ if (SSL_CTX_set_cipher_list(dom_ctx->ssl_ctx,
+ dom_ctx->config[SSL_CIPHER_LIST])
+ != 1) {
+ mg_cry_ctx_internal(phys_ctx,
+ "SSL_CTX_set_cipher_list error: %s",
+ ssl_error());
+ }
+ }
+
+ /* SSL session caching */
+ ssl_cache_timeout = ((dom_ctx->config[SSL_CACHE_TIMEOUT] != NULL)
+ ? atoi(dom_ctx->config[SSL_CACHE_TIMEOUT])
+ : 0);
+ if (ssl_cache_timeout > 0) {
+ SSL_CTX_set_session_cache_mode(dom_ctx->ssl_ctx, SSL_SESS_CACHE_BOTH);
+ /* SSL_CTX_sess_set_cache_size(dom_ctx->ssl_ctx, 10000); ... use
+ * default */
+ SSL_CTX_set_timeout(dom_ctx->ssl_ctx, (long)ssl_cache_timeout);
+ }
+
+#if defined(USE_ALPN)
+ /* Initialize ALPN only of TLS library (OpenSSL version) supports ALPN */
+#if !defined(NO_SSL_DL)
+ if (!tls_feature_missing[TLS_ALPN])
+#endif
+ {
+ init_alpn(phys_ctx, dom_ctx);
+ }
+#endif
+
+ return 1;
+}
+
+
+/* Check if SSL is required.
+ * If so, dynamically load SSL library
+ * and set up ctx->ssl_ctx pointer. */
+static int
+init_ssl_ctx(struct mg_context *phys_ctx, struct mg_domain_context *dom_ctx)
+{
+ void *ssl_ctx = 0;
+ int callback_ret;
+ const char *pem;
+ const char *chain;
+ char ebuf[128];
+
+ if (!phys_ctx) {
+ return 0;
+ }
+
+ if (!dom_ctx) {
+ dom_ctx = &(phys_ctx->dd);
+ }
+
+ if (!is_ssl_port_used(dom_ctx->config[LISTENING_PORTS])) {
+ /* No SSL port is set. No need to setup SSL. */
+ return 1;
+ }
+
+ /* Check for external SSL_CTX */
+ callback_ret =
+ (phys_ctx->callbacks.external_ssl_ctx == NULL)
+ ? 0
+ : (phys_ctx->callbacks.external_ssl_ctx(&ssl_ctx,
+ phys_ctx->user_data));
+
+ if (callback_ret < 0) {
+ /* Callback exists and returns <0: Initializing failed. */
+ mg_cry_ctx_internal(phys_ctx,
+ "external_ssl_ctx callback returned error: %i",
+ callback_ret);
+ return 0;
+ } else if (callback_ret > 0) {
+ /* Callback exists and returns >0: Initializing complete,
+ * civetweb should not modify the SSL context. */
+ dom_ctx->ssl_ctx = (SSL_CTX *)ssl_ctx;
+ if (!initialize_openssl(ebuf, sizeof(ebuf))) {
+ mg_cry_ctx_internal(phys_ctx, "%s", ebuf);
+ return 0;
+ }
+ return 1;
+ }
+ /* If the callback does not exist or return 0, civetweb must initialize
+ * the SSL context. Handle "domain" callback next. */
+
+ /* Check for external domain SSL_CTX callback. */
+ callback_ret = (phys_ctx->callbacks.external_ssl_ctx_domain == NULL)
+ ? 0
+ : (phys_ctx->callbacks.external_ssl_ctx_domain(
+ dom_ctx->config[AUTHENTICATION_DOMAIN],
+ &ssl_ctx,
+ phys_ctx->user_data));
+
+ if (callback_ret < 0) {
+ /* Callback < 0: Error. Abort init. */
+ mg_cry_ctx_internal(
+ phys_ctx,
+ "external_ssl_ctx_domain callback returned error: %i",
+ callback_ret);
+ return 0;
+ } else if (callback_ret > 0) {
+ /* Callback > 0: Consider init done. */
+ dom_ctx->ssl_ctx = (SSL_CTX *)ssl_ctx;
+ if (!initialize_openssl(ebuf, sizeof(ebuf))) {
+ mg_cry_ctx_internal(phys_ctx, "%s", ebuf);
+ return 0;
+ }
+ return 1;
+ }
+ /* else: external_ssl_ctx/external_ssl_ctx_domain do not exist or return
+ * 0, CivetWeb should continue initializing SSL */
+
+ /* If PEM file is not specified and the init_ssl callbacks
+ * are not specified, setup will fail. */
+ if (((pem = dom_ctx->config[SSL_CERTIFICATE]) == NULL)
+ && (phys_ctx->callbacks.init_ssl == NULL)
+ && (phys_ctx->callbacks.init_ssl_domain == NULL)) {
+ /* No certificate and no init_ssl callbacks:
+ * Essential data to set up TLS is missing.
+ */
+ mg_cry_ctx_internal(phys_ctx,
+ "Initializing SSL failed: -%s is not set",
+ config_options[SSL_CERTIFICATE].name);
+ return 0;
+ }
+
+ /* If a certificate chain is configured, use it. */
+ chain = dom_ctx->config[SSL_CERTIFICATE_CHAIN];
+ if (chain == NULL) {
+ /* Default: certificate chain in PEM file */
+ chain = pem;
+ }
+ if ((chain != NULL) && (*chain == 0)) {
+ /* If the chain is an empty string, don't use it. */
+ chain = NULL;
+ }
+
+ if (!initialize_openssl(ebuf, sizeof(ebuf))) {
+ mg_cry_ctx_internal(phys_ctx, "%s", ebuf);
+ return 0;
+ }
+
+ return init_ssl_ctx_impl(phys_ctx, dom_ctx, pem, chain);
+}
+
+
+static void
+uninitialize_openssl(void)
+{
+#if defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)
+
+ if (mg_atomic_dec(&cryptolib_users) == 0) {
+
+ /* Shutdown according to
+ * https://wiki.openssl.org/index.php/Library_Initialization#Cleanup
+ * http://stackoverflow.com/questions/29845527/how-to-properly-uninitialize-openssl
+ */
+ CONF_modules_unload(1);
+#else
+ int i;
+
+ if (mg_atomic_dec(&cryptolib_users) == 0) {
+
+ /* Shutdown according to
+ * https://wiki.openssl.org/index.php/Library_Initialization#Cleanup
+ * http://stackoverflow.com/questions/29845527/how-to-properly-uninitialize-openssl
+ */
+ CRYPTO_set_locking_callback(NULL);
+ CRYPTO_set_id_callback(NULL);
+ ENGINE_cleanup();
+ CONF_modules_unload(1);
+ ERR_free_strings();
+ EVP_cleanup();
+ CRYPTO_cleanup_all_ex_data();
+ OPENSSL_REMOVE_THREAD_STATE();
+
+ for (i = 0; i < CRYPTO_num_locks(); i++) {
+ pthread_mutex_destroy(&ssl_mutexes[i]);
+ }
+ mg_free(ssl_mutexes);
+ ssl_mutexes = NULL;
+#endif /* OPENSSL_API_1_1 || OPENSSL_API_3_0 */
+ }
+}
+#endif /* !defined(NO_SSL) && !defined(USE_MBEDTLS) */
+
+
+#if !defined(NO_FILESYSTEMS)
+static int
+set_gpass_option(struct mg_context *phys_ctx, struct mg_domain_context *dom_ctx)
+{
+ if (phys_ctx) {
+ struct mg_file file = STRUCT_FILE_INITIALIZER;
+ const char *path;
+ struct mg_connection fc;
+ if (!dom_ctx) {
+ dom_ctx = &(phys_ctx->dd);
+ }
+ path = dom_ctx->config[GLOBAL_PASSWORDS_FILE];
+ if ((path != NULL)
+ && !mg_stat(fake_connection(&fc, phys_ctx), path, &file.stat)) {
+ mg_cry_ctx_internal(phys_ctx,
+ "Cannot open %s: %s",
+ path,
+ strerror(ERRNO));
+ return 0;
+ }
+ return 1;
+ }
+ return 0;
+}
+#endif /* NO_FILESYSTEMS */
+
+
+static int
+set_acl_option(struct mg_context *phys_ctx)
+{
+ union usa sa;
+ memset(&sa, 0, sizeof(sa));
+#if defined(USE_IPV6)
+ sa.sin6.sin6_family = AF_INET6;
+#else
+ sa.sin.sin_family = AF_INET;
+#endif
+ return check_acl(phys_ctx, &sa) != -1;
+}
+
+
+static void
+reset_per_request_attributes(struct mg_connection *conn)
+{
+ if (!conn) {
+ return;
+ }
+
+ conn->num_bytes_sent = conn->consumed_content = 0;
+
+ conn->path_info = NULL;
+ conn->status_code = -1;
+ conn->content_len = -1;
+ conn->is_chunked = 0;
+ conn->must_close = 0;
+ conn->request_len = 0;
+ conn->request_state = 0;
+ conn->throttle = 0;
+ conn->accept_gzip = 0;
+
+ conn->response_info.content_length = conn->request_info.content_length = -1;
+ conn->response_info.http_version = conn->request_info.http_version = NULL;
+ conn->response_info.num_headers = conn->request_info.num_headers = 0;
+ conn->response_info.status_text = NULL;
+ conn->response_info.status_code = 0;
+
+ conn->request_info.remote_user = NULL;
+ conn->request_info.request_method = NULL;
+ conn->request_info.request_uri = NULL;
+
+ /* Free cleaned local URI (if any) */
+ if (conn->request_info.local_uri != conn->request_info.local_uri_raw) {
+ mg_free((void *)conn->request_info.local_uri);
+ conn->request_info.local_uri = NULL;
+ }
+ conn->request_info.local_uri = NULL;
+
+#if defined(USE_SERVER_STATS)
+ conn->processing_time = 0;
+#endif
+}
+
+
+static int
+set_tcp_nodelay(const struct socket *so, int nodelay_on)
+{
+ if ((so->lsa.sa.sa_family == AF_INET)
+ || (so->lsa.sa.sa_family == AF_INET6)) {
+ /* Only for TCP sockets */
+ if (setsockopt(so->sock,
+ IPPROTO_TCP,
+ TCP_NODELAY,
+ (SOCK_OPT_TYPE)&nodelay_on,
+ sizeof(nodelay_on))
+ != 0) {
+ /* Error */
+ return 1;
+ }
+ }
+ /* OK */
+ return 0;
+}
+
+
+#if !defined(__ZEPHYR__)
+static void
+close_socket_gracefully(struct mg_connection *conn)
+{
+#if defined(_WIN32)
+ char buf[MG_BUF_LEN];
+ int n;
+#endif
+ struct linger linger;
+ int error_code = 0;
+ int linger_timeout = -2;
+ socklen_t opt_len = sizeof(error_code);
+
+ if (!conn) {
+ return;
+ }
+
+ /* http://msdn.microsoft.com/en-us/library/ms739165(v=vs.85).aspx:
+ * "Note that enabling a nonzero timeout on a nonblocking socket
+ * is not recommended.", so set it to blocking now */
+ set_blocking_mode(conn->client.sock);
+
+ /* Send FIN to the client */
+ shutdown(conn->client.sock, SHUTDOWN_WR);
+
+#if defined(_WIN32)
+ /* Read and discard pending incoming data. If we do not do that and
+ * close
+ * the socket, the data in the send buffer may be discarded. This
+ * behaviour is seen on Windows, when client keeps sending data
+ * when server decides to close the connection; then when client
+ * does recv() it gets no data back. */
+ do {
+ n = pull_inner(NULL, conn, buf, sizeof(buf), /* Timeout in s: */ 1.0);
+ } while (n > 0);
+#endif
+
+ if (conn->dom_ctx->config[LINGER_TIMEOUT]) {
+ linger_timeout = atoi(conn->dom_ctx->config[LINGER_TIMEOUT]);
+ }
+
+ /* Set linger option according to configuration */
+ if (linger_timeout >= 0) {
+ /* Set linger option to avoid socket hanging out after close. This
+ * prevent ephemeral port exhaust problem under high QPS. */
+ linger.l_onoff = 1;
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4244)
+#endif
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+ /* Data type of linger structure elements may differ,
+ * so we don't know what cast we need here.
+ * Disable type conversion warnings. */
+
+ linger.l_linger = (linger_timeout + 999) / 1000;
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+ } else {
+ linger.l_onoff = 0;
+ linger.l_linger = 0;
+ }
+
+ if (linger_timeout < -1) {
+ /* Default: don't configure any linger */
+ } else if (getsockopt(conn->client.sock,
+ SOL_SOCKET,
+ SO_ERROR,
+#if defined(_WIN32) /* WinSock uses different data type here */
+ (char *)&error_code,
+#else
+ &error_code,
+#endif
+ &opt_len)
+ != 0) {
+ /* Cannot determine if socket is already closed. This should
+ * not occur and never did in a test. Log an error message
+ * and continue. */
+ mg_cry_internal(conn,
+ "%s: getsockopt(SOL_SOCKET SO_ERROR) failed: %s",
+ __func__,
+ strerror(ERRNO));
+#if defined(_WIN32)
+ } else if (error_code == WSAECONNRESET) {
+#else
+ } else if (error_code == ECONNRESET) {
+#endif
+ /* Socket already closed by client/peer, close socket without linger
+ */
+ } else {
+
+ /* Set linger timeout */
+ if (setsockopt(conn->client.sock,
+ SOL_SOCKET,
+ SO_LINGER,
+ (char *)&linger,
+ sizeof(linger))
+ != 0) {
+ mg_cry_internal(
+ conn,
+ "%s: setsockopt(SOL_SOCKET SO_LINGER(%i,%i)) failed: %s",
+ __func__,
+ linger.l_onoff,
+ linger.l_linger,
+ strerror(ERRNO));
+ }
+ }
+
+ /* Now we know that our FIN is ACK-ed, safe to close */
+ closesocket(conn->client.sock);
+ conn->client.sock = INVALID_SOCKET;
+}
+#endif
+
+
+static void
+close_connection(struct mg_connection *conn)
+{
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 6; /* to close */
+#endif
+
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ if (conn->lua_websocket_state) {
+ lua_websocket_close(conn, conn->lua_websocket_state);
+ conn->lua_websocket_state = NULL;
+ }
+#endif
+
+ mg_lock_connection(conn);
+
+ /* Set close flag, so keep-alive loops will stop */
+ conn->must_close = 1;
+
+ /* call the connection_close callback if assigned */
+ if (conn->phys_ctx->callbacks.connection_close != NULL) {
+ if (conn->phys_ctx->context_type == CONTEXT_SERVER) {
+ conn->phys_ctx->callbacks.connection_close(conn);
+ }
+ }
+
+ /* Reset user data, after close callback is called.
+ * Do not reuse it. If the user needs a destructor,
+ * it must be done in the connection_close callback. */
+ mg_set_user_connection_data(conn, NULL);
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 7; /* closing */
+#endif
+
+#if defined(USE_MBEDTLS)
+ if (conn->ssl != NULL) {
+ mbed_ssl_close(conn->ssl);
+ conn->ssl = NULL;
+ }
+#elif !defined(NO_SSL)
+ if (conn->ssl != NULL) {
+ /* Run SSL_shutdown twice to ensure completely close SSL connection
+ */
+ SSL_shutdown(conn->ssl);
+ SSL_free(conn->ssl);
+ OPENSSL_REMOVE_THREAD_STATE();
+ conn->ssl = NULL;
+ }
+#endif
+ if (conn->client.sock != INVALID_SOCKET) {
+#if defined(__ZEPHYR__)
+ closesocket(conn->client.sock);
+#else
+ close_socket_gracefully(conn);
+#endif
+ conn->client.sock = INVALID_SOCKET;
+ }
+
+ /* call the connection_closed callback if assigned */
+ if (conn->phys_ctx->callbacks.connection_closed != NULL) {
+ if (conn->phys_ctx->context_type == CONTEXT_SERVER) {
+ conn->phys_ctx->callbacks.connection_closed(conn);
+ }
+ }
+
+ mg_unlock_connection(conn);
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 8; /* closed */
+#endif
+}
+
+
+CIVETWEB_API void
+mg_close_connection(struct mg_connection *conn)
+{
+ if ((conn == NULL) || (conn->phys_ctx == NULL)) {
+ return;
+ }
+
+#if defined(USE_WEBSOCKET)
+ if (conn->phys_ctx->context_type == CONTEXT_SERVER) {
+ if (conn->in_websocket_handling) {
+ /* Set close flag, so the server thread can exit. */
+ conn->must_close = 1;
+ return;
+ }
+ }
+ if (conn->phys_ctx->context_type == CONTEXT_WS_CLIENT) {
+
+ unsigned int i;
+
+ /* client context: loops must end */
+ STOP_FLAG_ASSIGN(&conn->phys_ctx->stop_flag, 1);
+ conn->must_close = 1;
+
+ /* We need to get the client thread out of the select/recv call
+ * here. */
+ /* Since we use a sleep quantum of some seconds to check for recv
+ * timeouts, we will just wait a few seconds in mg_join_thread. */
+
+ /* join worker thread */
+ for (i = 0; i < conn->phys_ctx->cfg_worker_threads; i++) {
+ mg_join_thread(conn->phys_ctx->worker_threadids[i]);
+ }
+ }
+#endif /* defined(USE_WEBSOCKET) */
+
+ close_connection(conn);
+
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS) // TODO: mbedTLS client
+ if (((conn->phys_ctx->context_type == CONTEXT_HTTP_CLIENT)
+ || (conn->phys_ctx->context_type == CONTEXT_WS_CLIENT))
+ && (conn->phys_ctx->dd.ssl_ctx != NULL)) {
+ SSL_CTX_free(conn->phys_ctx->dd.ssl_ctx);
+ }
+#endif
+
+#if defined(USE_WEBSOCKET)
+ if (conn->phys_ctx->context_type == CONTEXT_WS_CLIENT) {
+ mg_free(conn->phys_ctx->worker_threadids);
+ (void)pthread_mutex_destroy(&conn->mutex);
+ mg_free(conn);
+ } else if (conn->phys_ctx->context_type == CONTEXT_HTTP_CLIENT) {
+ (void)pthread_mutex_destroy(&conn->mutex);
+ mg_free(conn);
+ }
+#else
+ if (conn->phys_ctx->context_type == CONTEXT_HTTP_CLIENT) { /* Client */
+ (void)pthread_mutex_destroy(&conn->mutex);
+ mg_free(conn);
+ }
+#endif /* defined(USE_WEBSOCKET) */
+}
+
+
+static struct mg_connection *
+mg_connect_client_impl(const struct mg_client_options *client_options,
+ int use_ssl,
+ struct mg_init_data *init,
+ struct mg_error_data *error)
+{
+ struct mg_connection *conn = NULL;
+ SOCKET sock;
+ union usa sa;
+ struct sockaddr *psa;
+ socklen_t len;
+
+ unsigned max_req_size =
+ (unsigned)atoi(config_options[MAX_REQUEST_SIZE].default_value);
+
+ /* Size of structures, aligned to 8 bytes */
+ size_t conn_size = ((sizeof(struct mg_connection) + 7) >> 3) << 3;
+ size_t ctx_size = ((sizeof(struct mg_context) + 7) >> 3) << 3;
+ size_t alloc_size = conn_size + ctx_size + max_req_size;
+
+ (void)init; /* TODO: Implement required options */
+
+ conn = (struct mg_connection *)mg_calloc(1, alloc_size);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OK;
+ error->code_sub = 0;
+ if (error->text_buffer_size > 0) {
+ error->text[0] = 0;
+ }
+ }
+
+ if (conn == NULL) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)alloc_size;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "calloc(): %s",
+ strerror(ERRNO));
+ }
+ return NULL;
+ }
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-align"
+#endif /* defined(GCC_DIAGNOSTIC) */
+ /* conn_size is aligned to 8 bytes */
+
+ conn->phys_ctx = (struct mg_context *)(((char *)conn) + conn_size);
+
+#if defined(GCC_DIAGNOSTIC)
+#pragma GCC diagnostic pop
+#endif /* defined(GCC_DIAGNOSTIC) */
+
+ conn->buf = (((char *)conn) + conn_size + ctx_size);
+ conn->buf_size = (int)max_req_size;
+ conn->phys_ctx->context_type = CONTEXT_HTTP_CLIENT;
+ conn->dom_ctx = &(conn->phys_ctx->dd);
+
+ if (!connect_socket(conn->phys_ctx,
+ client_options->host,
+ client_options->port,
+ use_ssl,
+ error,
+ &sock,
+ &sa)) {
+ /* "error" will be set by connect_socket. */
+ /* free all memory and return NULL; */
+ mg_free(conn);
+ return NULL;
+ }
+
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS) // TODO: mbedTLS client
+#if (defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)) \
+ && !defined(NO_SSL_DL)
+
+ if (use_ssl
+ && (conn->dom_ctx->ssl_ctx = SSL_CTX_new(TLS_client_method()))
+ == NULL) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_TLS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "SSL_CTX_new error: %s",
+ ssl_error());
+ }
+
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+
+#else
+
+ if (use_ssl
+ && (conn->dom_ctx->ssl_ctx = SSL_CTX_new(SSLv23_client_method()))
+ == NULL) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_TLS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "SSL_CTX_new error: %s",
+ ssl_error());
+ }
+
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+
+#endif /* OPENSSL_API_1_1 || OPENSSL_API_3_0 */
+#endif /* NO_SSL */
+
+#if defined(USE_IPV6)
+ len = (sa.sa.sa_family == AF_INET) ? sizeof(conn->client.rsa.sin)
+ : sizeof(conn->client.rsa.sin6);
+ psa = (sa.sa.sa_family == AF_INET)
+ ? (struct sockaddr *)&(conn->client.rsa.sin)
+ : (struct sockaddr *)&(conn->client.rsa.sin6);
+#else
+ len = sizeof(conn->client.rsa.sin);
+ psa = (struct sockaddr *)&(conn->client.rsa.sin);
+#endif
+
+ conn->client.sock = sock;
+ conn->client.lsa = sa;
+
+ if (getsockname(sock, psa, &len) != 0) {
+ mg_cry_internal(conn,
+ "%s: getsockname() failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+
+ conn->client.is_ssl = use_ssl ? 1 : 0;
+ if (0 != pthread_mutex_init(&conn->mutex, &pthread_mutex_attr)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "Can not create mutex");
+ }
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS) // TODO: mbedTLS client
+ SSL_CTX_free(conn->dom_ctx->ssl_ctx);
+#endif
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS) // TODO: mbedTLS client
+ if (use_ssl) {
+ /* TODO: Check ssl_verify_peer and ssl_ca_path here.
+ * SSL_CTX_set_verify call is needed to switch off server
+ * certificate checking, which is off by default in OpenSSL and
+ * on in yaSSL. */
+ /* TODO: SSL_CTX_set_verify(conn->dom_ctx,
+ * SSL_VERIFY_PEER, verify_ssl_server); */
+
+ if (client_options->client_cert) {
+ if (!ssl_use_pem_file(conn->phys_ctx,
+ conn->dom_ctx,
+ client_options->client_cert,
+ NULL)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_TLS_CLIENT_CERT_ERROR;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "Can not use SSL client certificate");
+ }
+
+ SSL_CTX_free(conn->dom_ctx->ssl_ctx);
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+ }
+
+ if (client_options->server_cert) {
+ if (SSL_CTX_load_verify_locations(conn->dom_ctx->ssl_ctx,
+ client_options->server_cert,
+ NULL)
+ != 1) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_TLS_SERVER_CERT_ERROR;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "SSL_CTX_load_verify_locations error: %s",
+ ssl_error());
+ }
+ SSL_CTX_free(conn->dom_ctx->ssl_ctx);
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+ SSL_CTX_set_verify(conn->dom_ctx->ssl_ctx, SSL_VERIFY_PEER, NULL);
+ } else {
+ SSL_CTX_set_verify(conn->dom_ctx->ssl_ctx, SSL_VERIFY_NONE, NULL);
+ }
+
+ if (!sslize(conn, SSL_connect, client_options)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_TLS_CONNECT_ERROR;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for ebuf */
+ error->text,
+ error->text_buffer_size,
+ "SSL connection error");
+ }
+ SSL_CTX_free(conn->dom_ctx->ssl_ctx);
+ closesocket(sock);
+ mg_free(conn);
+ return NULL;
+ }
+ }
+#endif
+
+ return conn;
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_client_secure(const struct mg_client_options *client_options,
+ char *error_buffer,
+ size_t error_buffer_size)
+{
+ struct mg_init_data init;
+ struct mg_error_data error;
+
+ memset(&init, 0, sizeof(init));
+ memset(&error, 0, sizeof(error));
+ error.text_buffer_size = error_buffer_size;
+ error.text = error_buffer;
+ return mg_connect_client_impl(client_options, 1, &init, &error);
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_client(const char *host,
+ int port,
+ int use_ssl,
+ char *error_buffer,
+ size_t error_buffer_size)
+{
+ struct mg_client_options opts;
+ struct mg_init_data init;
+ struct mg_error_data error;
+
+ memset(&init, 0, sizeof(init));
+
+ memset(&error, 0, sizeof(error));
+ error.text_buffer_size = error_buffer_size;
+ error.text = error_buffer;
+
+ memset(&opts, 0, sizeof(opts));
+ opts.host = host;
+ opts.port = port;
+ if (use_ssl) {
+ opts.host_name = host;
+ }
+
+ return mg_connect_client_impl(&opts, use_ssl, &init, &error);
+}
+
+
+#if defined(MG_EXPERIMENTAL_INTERFACES)
+CIVETWEB_API struct mg_connection *
+mg_connect_client2(const char *host,
+ const char *protocol,
+ int port,
+ const char *path,
+ struct mg_init_data *init,
+ struct mg_error_data *error)
+{
+ (void)path;
+
+ int is_ssl, is_ws;
+ /* void *user_data = (init != NULL) ? init->user_data : NULL; -- TODO */
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OK;
+ error->code_sub = 0;
+ if (error->text_buffer_size > 0) {
+ *error->text = 0;
+ }
+ }
+
+ if ((host == NULL) || (protocol == NULL)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Invalid parameters");
+ }
+ return NULL;
+ }
+
+ /* check all known protocols */
+ if (!mg_strcasecmp(protocol, "http")) {
+ is_ssl = 0;
+ is_ws = 0;
+ } else if (!mg_strcasecmp(protocol, "https")) {
+ is_ssl = 1;
+ is_ws = 0;
+#if defined(USE_WEBSOCKET)
+ } else if (!mg_strcasecmp(protocol, "ws")) {
+ is_ssl = 0;
+ is_ws = 1;
+ } else if (!mg_strcasecmp(protocol, "wss")) {
+ is_ssl = 1;
+ is_ws = 1;
+#endif
+ } else {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Protocol %s not supported",
+ protocol);
+ }
+ return NULL;
+ }
+
+ /* TODO: The current implementation here just calls the old
+ * implementations, without using any new options. This is just a first
+ * step to test the new interfaces. */
+#if defined(USE_WEBSOCKET)
+ if (is_ws) {
+ /* TODO: implement all options */
+ return mg_connect_websocket_client(
+ host,
+ port,
+ is_ssl,
+ ((error != NULL) ? error->text : NULL),
+ ((error != NULL) ? error->text_buffer_size : 0),
+ (path ? path : ""),
+ NULL /* TODO: origin */,
+ experimental_websocket_client_data_wrapper,
+ experimental_websocket_client_close_wrapper,
+ (void *)init->callbacks);
+ }
+#else
+ (void)is_ws;
+#endif
+
+ /* TODO: all additional options */
+ struct mg_client_options opts;
+
+ memset(&opts, 0, sizeof(opts));
+ opts.host = host;
+ opts.port = port;
+
+ return mg_connect_client_impl(&opts, is_ssl, init, error);
+}
+#endif
+
+
+static const struct {
+ const char *proto;
+ size_t proto_len;
+ unsigned default_port;
+} abs_uri_protocols[] = {{"http://", 7, 80},
+ {"https://", 8, 443},
+ {"ws://", 5, 80},
+ {"wss://", 6, 443},
+ {NULL, 0, 0}};
+
+
+/* Check if the uri is valid.
+ * return 0 for invalid uri,
+ * return 1 for *,
+ * return 2 for relative uri,
+ * return 3 for absolute uri without port,
+ * return 4 for absolute uri with port */
+static int
+get_uri_type(const char *uri)
+{
+ int i;
+ const char *hostend, *portbegin;
+ char *portend;
+ unsigned long port;
+
+ /* According to the HTTP standard
+ * http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
+ * URI can be an asterisk (*) or should start with slash (relative uri),
+ * or it should start with the protocol (absolute uri). */
+ if ((uri[0] == '*') && (uri[1] == '\0')) {
+ /* asterisk */
+ return 1;
+ }
+
+ /* Valid URIs according to RFC 3986
+ * (https://www.ietf.org/rfc/rfc3986.txt)
+ * must only contain reserved characters :/?#[]@!$&'()*+,;=
+ * and unreserved characters A-Z a-z 0-9 and -._~
+ * and % encoded symbols.
+ */
+ for (i = 0; uri[i] != 0; i++) {
+ if (uri[i] < 33) {
+ /* control characters and spaces are invalid */
+ return 0;
+ }
+ /* Allow everything else here (See #894) */
+ }
+
+ /* A relative uri starts with a / character */
+ if (uri[0] == '/') {
+ /* relative uri */
+ return 2;
+ }
+
+ /* It could be an absolute uri: */
+ /* This function only checks if the uri is valid, not if it is
+ * addressing the current server. So civetweb can also be used
+ * as a proxy server. */
+ for (i = 0; abs_uri_protocols[i].proto != NULL; i++) {
+ if (mg_strncasecmp(uri,
+ abs_uri_protocols[i].proto,
+ abs_uri_protocols[i].proto_len)
+ == 0) {
+
+ hostend = strchr(uri + abs_uri_protocols[i].proto_len, '/');
+ if (!hostend) {
+ return 0;
+ }
+ portbegin = strchr(uri + abs_uri_protocols[i].proto_len, ':');
+ if (!portbegin) {
+ return 3;
+ }
+
+ port = strtoul(portbegin + 1, &portend, 10);
+ if ((portend != hostend) || (port <= 0) || !is_valid_port(port)) {
+ return 0;
+ }
+
+ return 4;
+ }
+ }
+
+ return 0;
+}
+
+
+/* Return NULL or the relative uri at the current server */
+static const char *
+get_rel_url_at_current_server(const char *uri, const struct mg_connection *conn)
+{
+ const char *server_domain;
+ size_t server_domain_len;
+ size_t request_domain_len = 0;
+ unsigned long port = 0;
+ int i, auth_domain_check_enabled;
+ const char *hostbegin = NULL;
+ const char *hostend = NULL;
+ const char *portbegin;
+ char *portend;
+
+ auth_domain_check_enabled =
+ !mg_strcasecmp(conn->dom_ctx->config[ENABLE_AUTH_DOMAIN_CHECK], "yes");
+
+ /* DNS is case insensitive, so use case insensitive string compare here
+ */
+ for (i = 0; abs_uri_protocols[i].proto != NULL; i++) {
+ if (mg_strncasecmp(uri,
+ abs_uri_protocols[i].proto,
+ abs_uri_protocols[i].proto_len)
+ == 0) {
+
+ hostbegin = uri + abs_uri_protocols[i].proto_len;
+ hostend = strchr(hostbegin, '/');
+ if (!hostend) {
+ return 0;
+ }
+ portbegin = strchr(hostbegin, ':');
+ if ((!portbegin) || (portbegin > hostend)) {
+ port = abs_uri_protocols[i].default_port;
+ request_domain_len = (size_t)(hostend - hostbegin);
+ } else {
+ port = strtoul(portbegin + 1, &portend, 10);
+ if ((portend != hostend) || (port <= 0)
+ || !is_valid_port(port)) {
+ return 0;
+ }
+ request_domain_len = (size_t)(portbegin - hostbegin);
+ }
+ /* protocol found, port set */
+ break;
+ }
+ }
+
+ if (!port) {
+ /* port remains 0 if the protocol is not found */
+ return 0;
+ }
+
+ /* Check if the request is directed to a different server. */
+ /* First check if the port is the same. */
+ if (ntohs(USA_IN_PORT_UNSAFE(&conn->client.lsa)) != port) {
+ /* Request is directed to a different port */
+ return 0;
+ }
+
+ /* Finally check if the server corresponds to the authentication
+ * domain of the server (the server domain).
+ * Allow full matches (like http://mydomain.com/path/file.ext), and
+ * allow subdomain matches (like http://www.mydomain.com/path/file.ext),
+ * but do not allow substrings (like
+ * http://notmydomain.com/path/file.ext
+ * or http://mydomain.com.fake/path/file.ext).
+ */
+ if (auth_domain_check_enabled) {
+ server_domain = conn->dom_ctx->config[AUTHENTICATION_DOMAIN];
+ server_domain_len = strlen(server_domain);
+ if ((server_domain_len == 0) || (hostbegin == NULL)) {
+ return 0;
+ }
+ if ((request_domain_len == server_domain_len)
+ && (!memcmp(server_domain, hostbegin, server_domain_len))) {
+ /* Request is directed to this server - full name match. */
+ } else {
+ if (request_domain_len < (server_domain_len + 2)) {
+ /* Request is directed to another server: The server name
+ * is longer than the request name.
+ * Drop this case here to avoid overflows in the
+ * following checks. */
+ return 0;
+ }
+ if (hostbegin[request_domain_len - server_domain_len - 1] != '.') {
+ /* Request is directed to another server: It could be a
+ * substring
+ * like notmyserver.com */
+ return 0;
+ }
+ if (0
+ != memcmp(server_domain,
+ hostbegin + request_domain_len - server_domain_len,
+ server_domain_len)) {
+ /* Request is directed to another server:
+ * The server name is different. */
+ return 0;
+ }
+ }
+ }
+
+ return hostend;
+}
+
+
+static int
+get_message(struct mg_connection *conn, char *ebuf, size_t ebuf_len, int *err)
+{
+ if (ebuf_len > 0) {
+ ebuf[0] = '\0';
+ }
+ *err = 0;
+
+ reset_per_request_attributes(conn);
+
+ if (!conn) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Internal error");
+ *err = 500;
+ return 0;
+ }
+
+ /* Set the time the request was received. This value should be used for
+ * timeouts. */
+ clock_gettime(CLOCK_MONOTONIC, &(conn->req_time));
+
+ conn->request_len =
+ read_message(NULL, conn, conn->buf, conn->buf_size, &conn->data_len);
+ DEBUG_ASSERT(conn->request_len < 0 || conn->data_len >= conn->request_len);
+ if ((conn->request_len >= 0) && (conn->data_len < conn->request_len)) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Invalid message size");
+ *err = 500;
+ return 0;
+ }
+
+ if ((conn->request_len == 0) && (conn->data_len == conn->buf_size)) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Message too large");
+ *err = 413;
+ return 0;
+ }
+
+ if (conn->request_len <= 0) {
+ if (conn->data_len > 0) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Malformed message");
+ *err = 400;
+ } else {
+ /* Server did not recv anything -> just close the connection */
+ conn->must_close = 1;
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "No data received");
+ *err = 0;
+ }
+ return 0;
+ }
+ return 1;
+}
+
+
+static int
+get_request(struct mg_connection *conn, char *ebuf, size_t ebuf_len, int *err)
+{
+ const char *cl;
+
+ conn->connection_type =
+ CONNECTION_TYPE_REQUEST; /* request (valid of not) */
+
+ if (!get_message(conn, ebuf, ebuf_len, err)) {
+ return 0;
+ }
+
+ if (parse_http_request(conn->buf, conn->buf_size, &conn->request_info)
+ <= 0) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request");
+ *err = 400;
+ return 0;
+ }
+
+ /* Message is a valid request */
+
+ if (!switch_domain_context(conn)) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request: Host mismatch");
+ *err = 400;
+ return 0;
+ }
+
+#if USE_ZLIB
+ if (((cl = get_header(conn->request_info.http_headers,
+ conn->request_info.num_headers,
+ "Accept-Encoding"))
+ != NULL)
+ && strstr(cl, "gzip")) {
+ conn->accept_gzip = 1;
+ }
+#endif
+ if (((cl = get_header(conn->request_info.http_headers,
+ conn->request_info.num_headers,
+ "Transfer-Encoding"))
+ != NULL)
+ && mg_strcasecmp(cl, "identity")) {
+ if (mg_strcasecmp(cl, "chunked")) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request");
+ *err = 400;
+ return 0;
+ }
+ conn->is_chunked = 1;
+ conn->content_len = 0; /* not yet read */
+ } else if ((cl = get_header(conn->request_info.http_headers,
+ conn->request_info.num_headers,
+ "Content-Length"))
+ != NULL) {
+ /* Request has content length set */
+ char *endptr = NULL;
+ conn->content_len = strtoll(cl, &endptr, 10);
+ if ((endptr == cl) || (conn->content_len < 0)) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request");
+ *err = 411;
+ return 0;
+ }
+ /* Publish the content length back to the request info. */
+ conn->request_info.content_length = conn->content_len;
+ } else {
+ /* There is no exception, see RFC7230. */
+ conn->content_len = 0;
+ }
+
+ return 1;
+}
+
+
+/* conn is assumed to be valid in this internal function */
+static int
+get_response(struct mg_connection *conn, char *ebuf, size_t ebuf_len, int *err)
+{
+ const char *cl;
+
+ conn->connection_type =
+ CONNECTION_TYPE_RESPONSE; /* response (valid or not) */
+
+ if (!get_message(conn, ebuf, ebuf_len, err)) {
+ return 0;
+ }
+
+ if (parse_http_response(conn->buf, conn->buf_size, &conn->response_info)
+ <= 0) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad response");
+ *err = 400;
+ return 0;
+ }
+
+ /* Message is a valid response */
+
+ if (((cl = get_header(conn->response_info.http_headers,
+ conn->response_info.num_headers,
+ "Transfer-Encoding"))
+ != NULL)
+ && mg_strcasecmp(cl, "identity")) {
+ if (mg_strcasecmp(cl, "chunked")) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request");
+ *err = 400;
+ return 0;
+ }
+ conn->is_chunked = 1;
+ conn->content_len = 0; /* not yet read */
+ } else if ((cl = get_header(conn->response_info.http_headers,
+ conn->response_info.num_headers,
+ "Content-Length"))
+ != NULL) {
+ char *endptr = NULL;
+ conn->content_len = strtoll(cl, &endptr, 10);
+ if ((endptr == cl) || (conn->content_len < 0)) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Bad request");
+ *err = 411;
+ return 0;
+ }
+ /* Publish the content length back to the response info. */
+ conn->response_info.content_length = conn->content_len;
+
+ /* TODO: check if it is still used in response_info */
+ conn->request_info.content_length = conn->content_len;
+
+ /* TODO: we should also consider HEAD method */
+ if (conn->response_info.status_code == 304) {
+ conn->content_len = 0;
+ }
+ } else {
+ /* TODO: we should also consider HEAD method */
+ if (((conn->response_info.status_code >= 100)
+ && (conn->response_info.status_code <= 199))
+ || (conn->response_info.status_code == 204)
+ || (conn->response_info.status_code == 304)) {
+ conn->content_len = 0;
+ } else {
+ conn->content_len = -1; /* unknown content length */
+ }
+ }
+
+ return 1;
+}
+
+
+CIVETWEB_API int
+mg_get_response(struct mg_connection *conn,
+ char *ebuf,
+ size_t ebuf_len,
+ int timeout)
+{
+ int err, ret;
+ char txt[32]; /* will not overflow */
+ char *save_timeout;
+ char *new_timeout;
+
+ if (ebuf_len > 0) {
+ ebuf[0] = '\0';
+ }
+
+ if (!conn) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Parameter error");
+ return -1;
+ }
+
+ /* Reset the previous responses */
+ conn->data_len = 0;
+
+ /* Implementation of API function for HTTP clients */
+ save_timeout = conn->dom_ctx->config[REQUEST_TIMEOUT];
+
+ if (timeout >= 0) {
+ mg_snprintf(conn, NULL, txt, sizeof(txt), "%i", timeout);
+ new_timeout = txt;
+ } else {
+ new_timeout = NULL;
+ }
+
+ conn->dom_ctx->config[REQUEST_TIMEOUT] = new_timeout;
+ ret = get_response(conn, ebuf, ebuf_len, &err);
+ conn->dom_ctx->config[REQUEST_TIMEOUT] = save_timeout;
+
+ /* TODO: here, the URI is the http response code */
+ conn->request_info.local_uri_raw = conn->request_info.request_uri;
+ conn->request_info.local_uri = conn->request_info.local_uri_raw;
+
+ /* TODO (mid): Define proper return values - maybe return length?
+ * For the first test use <0 for error and >0 for OK */
+ return (ret == 0) ? -1 : +1;
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_download(const char *host,
+ int port,
+ int use_ssl,
+ char *ebuf,
+ size_t ebuf_len,
+ const char *fmt,
+ ...)
+{
+ struct mg_connection *conn;
+ va_list ap;
+ int i;
+ int reqerr;
+
+ if (ebuf_len > 0) {
+ ebuf[0] = '\0';
+ }
+
+ va_start(ap, fmt);
+
+ /* open a connection */
+ conn = mg_connect_client(host, port, use_ssl, ebuf, ebuf_len);
+
+ if (conn != NULL) {
+ i = mg_vprintf(conn, fmt, ap);
+ if (i <= 0) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ ebuf_len,
+ "%s",
+ "Error sending request");
+ } else {
+ /* make sure the buffer is clear */
+ conn->data_len = 0;
+ get_response(conn, ebuf, ebuf_len, &reqerr);
+
+ /* TODO: here, the URI is the http response code */
+ conn->request_info.local_uri = conn->request_info.request_uri;
+ }
+ }
+
+ /* if an error occurred, close the connection */
+ if ((ebuf[0] != '\0') && (conn != NULL)) {
+ mg_close_connection(conn);
+ conn = NULL;
+ }
+
+ va_end(ap);
+ return conn;
+}
+
+
+struct websocket_client_thread_data {
+ struct mg_connection *conn;
+ mg_websocket_data_handler data_handler;
+ mg_websocket_close_handler close_handler;
+ void *callback_data;
+};
+
+
+#if defined(USE_WEBSOCKET)
+#if defined(_WIN32)
+static unsigned __stdcall websocket_client_thread(void *data)
+#else
+static void *
+websocket_client_thread(void *data)
+#endif
+{
+ struct websocket_client_thread_data *cdata =
+ (struct websocket_client_thread_data *)data;
+
+ void *user_thread_ptr = NULL;
+
+#if !defined(_WIN32) && !defined(__ZEPHYR__)
+ struct sigaction sa;
+
+ /* Ignore SIGPIPE */
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGPIPE, &sa, NULL);
+#endif
+
+ mg_set_thread_name("ws-clnt");
+
+ if (cdata->conn->phys_ctx) {
+ if (cdata->conn->phys_ctx->callbacks.init_thread) {
+ /* 3 indicates a websocket client thread */
+ /* TODO: check if conn->phys_ctx can be set */
+ user_thread_ptr = cdata->conn->phys_ctx->callbacks.init_thread(
+ cdata->conn->phys_ctx, 3);
+ }
+ }
+
+ read_websocket(cdata->conn, cdata->data_handler, cdata->callback_data);
+
+ DEBUG_TRACE("%s", "Websocket client thread exited\n");
+
+ if (cdata->close_handler != NULL) {
+ cdata->close_handler(cdata->conn, cdata->callback_data);
+ }
+
+ /* The websocket_client context has only this thread. If it runs out,
+ set the stop_flag to 2 (= "stopped"). */
+ STOP_FLAG_ASSIGN(&cdata->conn->phys_ctx->stop_flag, 2);
+
+ if (cdata->conn->phys_ctx->callbacks.exit_thread) {
+ cdata->conn->phys_ctx->callbacks.exit_thread(cdata->conn->phys_ctx,
+ 3,
+ user_thread_ptr);
+ }
+
+ mg_free((void *)cdata);
+
+#if defined(_WIN32)
+ return 0;
+#else
+ return NULL;
+#endif
+}
+#endif
+
+
+static struct mg_connection *
+mg_connect_websocket_client_impl(const struct mg_client_options *client_options,
+ int use_ssl,
+ char *error_buffer,
+ size_t error_buffer_size,
+ const char *path,
+ const char *origin,
+ const char *extensions,
+ mg_websocket_data_handler data_func,
+ mg_websocket_close_handler close_func,
+ void *user_data)
+{
+ struct mg_connection *conn = NULL;
+
+#if defined(USE_WEBSOCKET)
+ struct websocket_client_thread_data *thread_data;
+ static const char *magic = "x3JJHMbDL1EzLkh9GBhXDw==";
+
+ const char *host = client_options->host;
+ int i;
+
+ struct mg_init_data init;
+ struct mg_error_data error;
+
+ memset(&init, 0, sizeof(init));
+ memset(&error, 0, sizeof(error));
+ error.text_buffer_size = error_buffer_size;
+ error.text = error_buffer;
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wformat-nonliteral"
+#endif
+
+ /* Establish the client connection and request upgrade */
+ conn = mg_connect_client_impl(client_options, use_ssl, &init, &error);
+
+ /* Connection object will be null if something goes wrong */
+ if (conn == NULL) {
+ /* error_buffer should be already filled ... */
+ if (!error_buffer[0]) {
+ /* ... if not add an error message */
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ error_buffer,
+ error_buffer_size,
+ "Unexpected error");
+ }
+ return NULL;
+ }
+
+ if (origin != NULL) {
+ if (extensions != NULL) {
+ i = mg_printf(conn,
+ "GET %s HTTP/1.1\r\n"
+ "Host: %s\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Key: %s\r\n"
+ "Sec-WebSocket-Version: 13\r\n"
+ "Sec-WebSocket-Extensions: %s\r\n"
+ "Origin: %s\r\n"
+ "\r\n",
+ path,
+ host,
+ magic,
+ extensions,
+ origin);
+ } else {
+ i = mg_printf(conn,
+ "GET %s HTTP/1.1\r\n"
+ "Host: %s\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Key: %s\r\n"
+ "Sec-WebSocket-Version: 13\r\n"
+ "Origin: %s\r\n"
+ "\r\n",
+ path,
+ host,
+ magic,
+ origin);
+ }
+ } else {
+
+ if (extensions != NULL) {
+ i = mg_printf(conn,
+ "GET %s HTTP/1.1\r\n"
+ "Host: %s\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Key: %s\r\n"
+ "Sec-WebSocket-Version: 13\r\n"
+ "Sec-WebSocket-Extensions: %s\r\n"
+ "\r\n",
+ path,
+ host,
+ magic,
+ extensions);
+ } else {
+ i = mg_printf(conn,
+ "GET %s HTTP/1.1\r\n"
+ "Host: %s\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Key: %s\r\n"
+ "Sec-WebSocket-Version: 13\r\n"
+ "\r\n",
+ path,
+ host,
+ magic);
+ }
+ }
+ if (i <= 0) {
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ error_buffer,
+ error_buffer_size,
+ "%s",
+ "Error sending request");
+ mg_close_connection(conn);
+ return NULL;
+ }
+
+ conn->data_len = 0;
+ if (!get_response(conn, error_buffer, error_buffer_size, &i)) {
+ mg_close_connection(conn);
+ return NULL;
+ }
+ conn->request_info.local_uri_raw = conn->request_info.request_uri;
+ conn->request_info.local_uri = conn->request_info.local_uri_raw;
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+ if (conn->response_info.status_code != 101) {
+ /* We sent an "upgrade" request. For a correct websocket
+ * protocol handshake, we expect a "101 Continue" response.
+ * Otherwise it is a protocol violation. Maybe the HTTP
+ * Server does not know websockets. */
+ if (!*error_buffer) {
+ /* set an error, if not yet set */
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ error_buffer,
+ error_buffer_size,
+ "Unexpected server reply");
+ }
+
+ DEBUG_TRACE("Websocket client connect error: %s\r\n", error_buffer);
+ mg_close_connection(conn);
+ return NULL;
+ }
+
+ thread_data = (struct websocket_client_thread_data *)mg_calloc_ctx(
+ 1, sizeof(struct websocket_client_thread_data), conn->phys_ctx);
+ if (!thread_data) {
+ DEBUG_TRACE("%s\r\n", "Out of memory");
+ mg_close_connection(conn);
+ return NULL;
+ }
+
+ thread_data->conn = conn;
+ thread_data->data_handler = data_func;
+ thread_data->close_handler = close_func;
+ thread_data->callback_data = user_data;
+
+ conn->phys_ctx->worker_threadids =
+ (pthread_t *)mg_calloc_ctx(1, sizeof(pthread_t), conn->phys_ctx);
+ if (!conn->phys_ctx->worker_threadids) {
+ DEBUG_TRACE("%s\r\n", "Out of memory");
+ mg_free(thread_data);
+ mg_close_connection(conn);
+ return NULL;
+ }
+
+ /* Now upgrade to ws/wss client context */
+ conn->phys_ctx->user_data = user_data;
+ conn->phys_ctx->context_type = CONTEXT_WS_CLIENT;
+ conn->phys_ctx->cfg_worker_threads = 1; /* one worker thread */
+
+ /* Start a thread to read the websocket client connection
+ * This thread will automatically stop when mg_disconnect is
+ * called on the client connection */
+ if (mg_start_thread_with_id(websocket_client_thread,
+ thread_data,
+ conn->phys_ctx->worker_threadids)
+ != 0) {
+ conn->phys_ctx->cfg_worker_threads = 0;
+ mg_free(thread_data);
+ mg_close_connection(conn);
+ conn = NULL;
+ DEBUG_TRACE("%s",
+ "Websocket client connect thread could not be started\r\n");
+ }
+
+#else
+ /* Appease "unused parameter" warnings */
+ (void)client_options;
+ (void)use_ssl;
+ (void)error_buffer;
+ (void)error_buffer_size;
+ (void)path;
+ (void)origin;
+ (void)extensions;
+ (void)user_data;
+ (void)data_func;
+ (void)close_func;
+#endif
+
+ return conn;
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_websocket_client(const char *host,
+ int port,
+ int use_ssl,
+ char *error_buffer,
+ size_t error_buffer_size,
+ const char *path,
+ const char *origin,
+ mg_websocket_data_handler data_func,
+ mg_websocket_close_handler close_func,
+ void *user_data)
+{
+ struct mg_client_options client_options;
+ memset(&client_options, 0, sizeof(client_options));
+ client_options.host = host;
+ client_options.port = port;
+
+ return mg_connect_websocket_client_impl(&client_options,
+ use_ssl,
+ error_buffer,
+ error_buffer_size,
+ path,
+ origin,
+ NULL,
+ data_func,
+ close_func,
+ user_data);
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_websocket_client_secure(
+ const struct mg_client_options *client_options,
+ char *error_buffer,
+ size_t error_buffer_size,
+ const char *path,
+ const char *origin,
+ mg_websocket_data_handler data_func,
+ mg_websocket_close_handler close_func,
+ void *user_data)
+{
+ if (!client_options) {
+ return NULL;
+ }
+ return mg_connect_websocket_client_impl(client_options,
+ 1,
+ error_buffer,
+ error_buffer_size,
+ path,
+ origin,
+ NULL,
+ data_func,
+ close_func,
+ user_data);
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_websocket_client_extensions(const char *host,
+ int port,
+ int use_ssl,
+ char *error_buffer,
+ size_t error_buffer_size,
+ const char *path,
+ const char *origin,
+ const char *extensions,
+ mg_websocket_data_handler data_func,
+ mg_websocket_close_handler close_func,
+ void *user_data)
+{
+ struct mg_client_options client_options;
+ memset(&client_options, 0, sizeof(client_options));
+ client_options.host = host;
+ client_options.port = port;
+
+ return mg_connect_websocket_client_impl(&client_options,
+ use_ssl,
+ error_buffer,
+ error_buffer_size,
+ path,
+ origin,
+ extensions,
+ data_func,
+ close_func,
+ user_data);
+}
+
+
+CIVETWEB_API struct mg_connection *
+mg_connect_websocket_client_secure_extensions(
+ const struct mg_client_options *client_options,
+ char *error_buffer,
+ size_t error_buffer_size,
+ const char *path,
+ const char *origin,
+ const char *extensions,
+ mg_websocket_data_handler data_func,
+ mg_websocket_close_handler close_func,
+ void *user_data)
+{
+ if (!client_options) {
+ return NULL;
+ }
+ return mg_connect_websocket_client_impl(client_options,
+ 1,
+ error_buffer,
+ error_buffer_size,
+ path,
+ origin,
+ extensions,
+ data_func,
+ close_func,
+ user_data);
+}
+
+
+/* Prepare connection data structure */
+static void
+init_connection(struct mg_connection *conn)
+{
+ /* Is keep alive allowed by the server */
+ int keep_alive_enabled =
+ !mg_strcasecmp(conn->dom_ctx->config[ENABLE_KEEP_ALIVE], "yes");
+
+ if (!keep_alive_enabled) {
+ conn->must_close = 1;
+ }
+
+ /* Important: on new connection, reset the receiving buffer. Credit
+ * goes to crule42. */
+ conn->data_len = 0;
+ conn->handled_requests = 0;
+ conn->connection_type = CONNECTION_TYPE_INVALID;
+ conn->request_info.acceptedWebSocketSubprotocol = NULL;
+ mg_set_user_connection_data(conn, NULL);
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 2; /* init */
+#endif
+
+ /* call the init_connection callback if assigned */
+ if (conn->phys_ctx->callbacks.init_connection != NULL) {
+ if (conn->phys_ctx->context_type == CONTEXT_SERVER) {
+ void *conn_data = NULL;
+ conn->phys_ctx->callbacks.init_connection(conn, &conn_data);
+ mg_set_user_connection_data(conn, conn_data);
+ }
+ }
+}
+
+
+/* Process a connection - may handle multiple requests
+ * using the same connection.
+ * Must be called with a valid connection (conn and
+ * conn->phys_ctx must be valid).
+ */
+static void
+process_new_connection(struct mg_connection *conn)
+{
+ struct mg_request_info *ri = &conn->request_info;
+ int keep_alive, discard_len;
+ char ebuf[100];
+ const char *hostend;
+ int reqerr, uri_type;
+
+#if defined(USE_SERVER_STATS)
+ ptrdiff_t mcon = mg_atomic_inc(&(conn->phys_ctx->active_connections));
+ mg_atomic_add(&(conn->phys_ctx->total_connections), 1);
+ mg_atomic_max(&(conn->phys_ctx->max_active_connections), mcon);
+#endif
+
+ DEBUG_TRACE("Start processing connection from %s",
+ conn->request_info.remote_addr);
+
+ /* Loop over multiple requests sent using the same connection
+ * (while "keep alive"). */
+ do {
+ DEBUG_TRACE("calling get_request (%i times for this connection)",
+ conn->handled_requests + 1);
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 3; /* ready */
+#endif
+
+ if (!get_request(conn, ebuf, sizeof(ebuf), &reqerr)) {
+ /* The request sent by the client could not be understood by
+ * the server, or it was incomplete or a timeout. Send an
+ * error message and close the connection. */
+ if (reqerr > 0) {
+ DEBUG_ASSERT(ebuf[0] != '\0');
+ mg_send_http_error(conn, reqerr, "%s", ebuf);
+ }
+
+ } else if (strcmp(ri->http_version, "1.0")
+ && strcmp(ri->http_version, "1.1")) {
+ /* HTTP/2 is not allowed here */
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ sizeof(ebuf),
+ "Bad HTTP version: [%s]",
+ ri->http_version);
+ mg_send_http_error(conn, 505, "%s", ebuf);
+ }
+
+ if (ebuf[0] == '\0') {
+ uri_type = get_uri_type(conn->request_info.request_uri);
+ switch (uri_type) {
+ case 1:
+ /* Asterisk */
+ conn->request_info.local_uri_raw = 0;
+ /* TODO: Deal with '*'. */
+ break;
+ case 2:
+ /* relative uri */
+ conn->request_info.local_uri_raw =
+ conn->request_info.request_uri;
+ break;
+ case 3:
+ case 4:
+ /* absolute uri (with/without port) */
+ hostend = get_rel_url_at_current_server(
+ conn->request_info.request_uri, conn);
+ if (hostend) {
+ conn->request_info.local_uri_raw = hostend;
+ } else {
+ conn->request_info.local_uri_raw = NULL;
+ }
+ break;
+ default:
+ mg_snprintf(conn,
+ NULL, /* No truncation check for ebuf */
+ ebuf,
+ sizeof(ebuf),
+ "Invalid URI");
+ mg_send_http_error(conn, 400, "%s", ebuf);
+ conn->request_info.local_uri_raw = NULL;
+ break;
+ }
+ conn->request_info.local_uri =
+ (char *)conn->request_info.local_uri_raw;
+ }
+
+ if (ebuf[0] != '\0') {
+ conn->protocol_type = -1;
+
+ } else {
+ /* HTTP/1 allows protocol upgrade */
+ conn->protocol_type = should_switch_to_protocol(conn);
+
+ if (conn->protocol_type == PROTOCOL_TYPE_HTTP2) {
+ /* This will occur, if a HTTP/1.1 request should be upgraded
+ * to HTTP/2 - but not if HTTP/2 is negotiated using ALPN.
+ * Since most (all?) major browsers only support HTTP/2 using
+ * ALPN, this is hard to test and very low priority.
+ * Deactivate it (at least for now).
+ */
+ conn->protocol_type = PROTOCOL_TYPE_HTTP1;
+ }
+ }
+
+ DEBUG_TRACE("http: %s, error: %s",
+ (ri->http_version ? ri->http_version : "none"),
+ (ebuf[0] ? ebuf : "none"));
+
+ if (ebuf[0] == '\0') {
+ if (conn->request_info.local_uri) {
+
+ /* handle request to local server */
+ handle_request_stat_log(conn);
+
+ } else {
+ /* TODO: handle non-local request (PROXY) */
+ conn->must_close = 1;
+ }
+ } else {
+ conn->must_close = 1;
+ }
+
+ /* Response complete. Free header buffer */
+ free_buffered_response_header_list(conn);
+
+ if (ri->remote_user != NULL) {
+ mg_free((void *)ri->remote_user);
+ /* Important! When having connections with and without auth
+ * would cause double free and then crash */
+ ri->remote_user = NULL;
+ }
+
+ /* NOTE(lsm): order is important here. should_keep_alive() call
+ * is using parsed request, which will be invalid after
+ * memmove's below.
+ * Therefore, memorize should_keep_alive() result now for later
+ * use in loop exit condition. */
+ /* Enable it only if this request is completely discardable. */
+ keep_alive = STOP_FLAG_IS_ZERO(&conn->phys_ctx->stop_flag)
+ && should_keep_alive(conn) && (conn->content_len >= 0)
+ && (conn->request_len > 0)
+ && ((conn->is_chunked == 4)
+ || (!conn->is_chunked
+ && ((conn->consumed_content == conn->content_len)
+ || ((conn->request_len + conn->content_len)
+ <= conn->data_len))))
+ && (conn->protocol_type == PROTOCOL_TYPE_HTTP1);
+
+ if (keep_alive) {
+ /* Discard all buffered data for this request */
+ discard_len =
+ ((conn->request_len + conn->content_len) < conn->data_len)
+ ? (int)(conn->request_len + conn->content_len)
+ : conn->data_len;
+ conn->data_len -= discard_len;
+
+ if (conn->data_len > 0) {
+ DEBUG_TRACE("discard_len = %d", discard_len);
+ memmove(conn->buf,
+ conn->buf + discard_len,
+ (size_t)conn->data_len);
+ }
+ }
+
+ DEBUG_ASSERT(conn->data_len >= 0);
+ DEBUG_ASSERT(conn->data_len <= conn->buf_size);
+
+ if ((conn->data_len < 0) || (conn->data_len > conn->buf_size)) {
+ DEBUG_TRACE("internal error: data_len = %li, buf_size = %li",
+ (long int)conn->data_len,
+ (long int)conn->buf_size);
+ break;
+ }
+ conn->handled_requests++;
+ } while (keep_alive);
+
+ DEBUG_TRACE("Done processing connection from %s (%f sec)",
+ conn->request_info.remote_addr,
+ difftime(time(NULL), conn->conn_birth_time));
+
+ close_connection(conn);
+
+#if defined(USE_SERVER_STATS)
+ mg_atomic_add(&(conn->phys_ctx->total_requests), conn->handled_requests);
+ mg_atomic_dec(&(conn->phys_ctx->active_connections));
+#endif
+}
+
+
+#if defined(ALTERNATIVE_QUEUE)
+
+static void
+produce_socket(struct mg_context *ctx, const struct socket *sp)
+{
+ unsigned int i;
+
+ while (!ctx->stop_flag) {
+ for (i = 0; i < ctx->cfg_worker_threads; i++) {
+ /* find a free worker slot and signal it */
+ if (ctx->client_socks[i].in_use == 2) {
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+ if ((ctx->client_socks[i].in_use == 2) && !ctx->stop_flag) {
+ ctx->client_socks[i] = *sp;
+ ctx->client_socks[i].in_use = 1;
+ /* socket has been moved to the consumer */
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+ (void)event_signal(ctx->client_wait_events[i]);
+ return;
+ }
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+ }
+ }
+ /* queue is full */
+ mg_sleep(1);
+ }
+ /* must consume */
+ set_blocking_mode(sp->sock);
+ closesocket(sp->sock);
+}
+
+
+static int
+consume_socket(struct mg_context *ctx, struct socket *sp, int thread_index)
+{
+ DEBUG_TRACE("%s", "going idle");
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+ ctx->client_socks[thread_index].in_use = 2;
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+
+ event_wait(ctx->client_wait_events[thread_index]);
+
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+ *sp = ctx->client_socks[thread_index];
+ if (ctx->stop_flag) {
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+ if (sp->in_use == 1) {
+ /* must consume */
+ set_blocking_mode(sp->sock);
+ closesocket(sp->sock);
+ }
+ return 0;
+ }
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+ if (sp->in_use == 1) {
+ DEBUG_TRACE("grabbed socket %d, going busy", sp->sock);
+ return 1;
+ }
+ /* must not reach here */
+ DEBUG_ASSERT(0);
+ return 0;
+}
+
+#else /* ALTERNATIVE_QUEUE */
+
+/* Worker threads take accepted socket from the queue */
+static int
+consume_socket(struct mg_context *ctx, struct socket *sp, int thread_index)
+{
+ (void)thread_index;
+
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+ DEBUG_TRACE("%s", "going idle");
+
+ /* If the queue is empty, wait. We're idle at this point. */
+ while ((ctx->sq_head == ctx->sq_tail)
+ && (STOP_FLAG_IS_ZERO(&ctx->stop_flag))) {
+ pthread_cond_wait(&ctx->sq_full, &ctx->thread_mutex);
+ }
+
+ /* If we're stopping, sq_head may be equal to sq_tail. */
+ if (ctx->sq_head > ctx->sq_tail) {
+ /* Copy socket from the queue and increment tail */
+ *sp = ctx->squeue[ctx->sq_tail % ctx->sq_size];
+ ctx->sq_tail++;
+
+ DEBUG_TRACE("grabbed socket %d, going busy", sp ? sp->sock : -1);
+
+ /* Wrap pointers if needed */
+ while (ctx->sq_tail > ctx->sq_size) {
+ ctx->sq_tail -= ctx->sq_size;
+ ctx->sq_head -= ctx->sq_size;
+ }
+ }
+
+ (void)pthread_cond_signal(&ctx->sq_empty);
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+
+ return STOP_FLAG_IS_ZERO(&ctx->stop_flag);
+}
+
+
+/* Master thread adds accepted socket to a queue */
+static void
+produce_socket(struct mg_context *ctx, const struct socket *sp)
+{
+ int queue_filled;
+
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+
+ queue_filled = ctx->sq_head - ctx->sq_tail;
+
+ /* If the queue is full, wait */
+ while (STOP_FLAG_IS_ZERO(&ctx->stop_flag)
+ && (queue_filled >= ctx->sq_size)) {
+ ctx->sq_blocked = 1; /* Status information: All threads busy */
+#if defined(USE_SERVER_STATS)
+ if (queue_filled > ctx->sq_max_fill) {
+ ctx->sq_max_fill = queue_filled;
+ }
+#endif
+ (void)pthread_cond_wait(&ctx->sq_empty, &ctx->thread_mutex);
+ ctx->sq_blocked = 0; /* Not blocked now */
+ queue_filled = ctx->sq_head - ctx->sq_tail;
+ }
+
+ if (queue_filled < ctx->sq_size) {
+ /* Copy socket to the queue and increment head */
+ ctx->squeue[ctx->sq_head % ctx->sq_size] = *sp;
+ ctx->sq_head++;
+ DEBUG_TRACE("queued socket %d", sp ? sp->sock : -1);
+ }
+
+ queue_filled = ctx->sq_head - ctx->sq_tail;
+#if defined(USE_SERVER_STATS)
+ if (queue_filled > ctx->sq_max_fill) {
+ ctx->sq_max_fill = queue_filled;
+ }
+#endif
+
+ (void)pthread_cond_signal(&ctx->sq_full);
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+}
+#endif /* ALTERNATIVE_QUEUE */
+
+
+static void
+worker_thread_run(struct mg_connection *conn)
+{
+ struct mg_context *ctx = conn->phys_ctx;
+ int thread_index;
+ struct mg_workerTLS tls;
+
+ mg_set_thread_name("worker");
+
+ tls.is_master = 0;
+ tls.thread_idx = (unsigned)mg_atomic_inc(&thread_idx_max);
+#if defined(_WIN32)
+ tls.pthread_cond_helper_mutex = CreateEvent(NULL, FALSE, FALSE, NULL);
+#endif
+
+ /* Initialize thread local storage before calling any callback */
+ pthread_setspecific(sTlsKey, &tls);
+
+ /* Check if there is a user callback */
+ if (ctx->callbacks.init_thread) {
+ /* call init_thread for a worker thread (type 1), and store the
+ * return value */
+ tls.user_ptr = ctx->callbacks.init_thread(ctx, 1);
+ } else {
+ /* No callback: set user pointer to NULL */
+ tls.user_ptr = NULL;
+ }
+
+ /* Connection structure has been pre-allocated */
+ thread_index = (int)(conn - ctx->worker_connections);
+ if ((thread_index < 0)
+ || ((unsigned)thread_index >= (unsigned)ctx->cfg_worker_threads)) {
+ mg_cry_ctx_internal(ctx,
+ "Internal error: Invalid worker index %i",
+ thread_index);
+ return;
+ }
+
+ /* Request buffers are not pre-allocated. They are private to the
+ * request and do not contain any state information that might be
+ * of interest to anyone observing a server status. */
+ conn->buf = (char *)mg_malloc_ctx(ctx->max_request_size, conn->phys_ctx);
+ if (conn->buf == NULL) {
+ mg_cry_ctx_internal(
+ ctx,
+ "Out of memory: Cannot allocate buffer for worker %i",
+ thread_index);
+ return;
+ }
+ conn->buf_size = (int)ctx->max_request_size;
+
+ conn->dom_ctx = &(ctx->dd); /* Use default domain and default host */
+
+ conn->tls_user_ptr = tls.user_ptr; /* store ptr for quick access */
+
+ conn->request_info.user_data = ctx->user_data;
+ /* Allocate a mutex for this connection to allow communication both
+ * within the request handler and from elsewhere in the application
+ */
+ if (0 != pthread_mutex_init(&conn->mutex, &pthread_mutex_attr)) {
+ mg_free(conn->buf);
+ mg_cry_ctx_internal(ctx, "%s", "Cannot create mutex");
+ return;
+ }
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 1; /* not consumed */
+#endif
+
+ /* Call consume_socket() even when ctx->stop_flag > 0, to let it
+ * signal sq_empty condvar to wake up the master waiting in
+ * produce_socket() */
+ while (consume_socket(ctx, &conn->client, thread_index)) {
+
+ /* New connections must start with new protocol negotiation */
+ tls.alpn_proto = NULL;
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_close_time = 0;
+#endif
+ conn->conn_birth_time = time(NULL);
+
+ /* Fill in IP, port info early so even if SSL setup below fails,
+ * error handler would have the corresponding info.
+ * Thanks to Johannes Winkelmann for the patch.
+ */
+ conn->request_info.remote_port =
+ ntohs(USA_IN_PORT_UNSAFE(&conn->client.rsa));
+
+ conn->request_info.server_port =
+ ntohs(USA_IN_PORT_UNSAFE(&conn->client.lsa));
+
+ sockaddr_to_string(conn->request_info.remote_addr,
+ sizeof(conn->request_info.remote_addr),
+ &conn->client.rsa);
+
+ DEBUG_TRACE("Incoming %sconnection from %s",
+ (conn->client.is_ssl ? "SSL " : ""),
+ conn->request_info.remote_addr);
+
+ conn->request_info.is_ssl = conn->client.is_ssl;
+
+ if (conn->client.is_ssl) {
+
+#if defined(USE_MBEDTLS)
+ /* HTTPS connection */
+ if (mbed_ssl_accept(&(conn->ssl),
+ conn->dom_ctx->ssl_ctx,
+ (int *)&(conn->client.sock),
+ conn->phys_ctx)
+ == 0) {
+ /* conn->dom_ctx is set in get_request */
+ /* process HTTPS connection */
+ init_connection(conn);
+ conn->connection_type = CONNECTION_TYPE_REQUEST;
+ conn->protocol_type = PROTOCOL_TYPE_HTTP1;
+ process_new_connection(conn);
+ } else {
+ /* make sure the connection is cleaned up on SSL failure */
+ close_connection(conn);
+ }
+
+#elif !defined(NO_SSL)
+ /* HTTPS connection */
+ if (sslize(conn, SSL_accept, NULL)) {
+ /* conn->dom_ctx is set in get_request */
+
+ /* Get SSL client certificate information (if set) */
+ struct mg_client_cert client_cert;
+ if (ssl_get_client_cert_info(conn, &client_cert)) {
+ conn->request_info.client_cert = &client_cert;
+ }
+
+ /* process HTTPS connection */
+#if defined(USE_HTTP2)
+ if ((tls.alpn_proto != NULL)
+ && (!memcmp(tls.alpn_proto, "\x02h2", 3))) {
+ /* process HTTPS/2 connection */
+ init_connection(conn);
+ conn->connection_type = CONNECTION_TYPE_REQUEST;
+ conn->protocol_type = PROTOCOL_TYPE_HTTP2;
+ conn->content_len =
+ -1; /* content length is not predefined */
+ conn->is_chunked = 0; /* HTTP2 is never chunked */
+ process_new_http2_connection(conn);
+ } else
+#endif
+ {
+ /* process HTTPS/1.x or WEBSOCKET-SECURE connection */
+ init_connection(conn);
+ conn->connection_type = CONNECTION_TYPE_REQUEST;
+ /* Start with HTTP, WS will be an "upgrade" request later */
+ conn->protocol_type = PROTOCOL_TYPE_HTTP1;
+ process_new_connection(conn);
+ }
+
+ /* Free client certificate info */
+ if (conn->request_info.client_cert) {
+ mg_free((void *)(conn->request_info.client_cert->subject));
+ mg_free((void *)(conn->request_info.client_cert->issuer));
+ mg_free((void *)(conn->request_info.client_cert->serial));
+ mg_free((void *)(conn->request_info.client_cert->finger));
+ /* Free certificate memory */
+ X509_free(
+ (X509 *)conn->request_info.client_cert->peer_cert);
+ conn->request_info.client_cert->peer_cert = 0;
+ conn->request_info.client_cert->subject = 0;
+ conn->request_info.client_cert->issuer = 0;
+ conn->request_info.client_cert->serial = 0;
+ conn->request_info.client_cert->finger = 0;
+ conn->request_info.client_cert = 0;
+ }
+ } else {
+ /* make sure the connection is cleaned up on SSL failure */
+ close_connection(conn);
+ }
+#endif
+
+ } else {
+ /* process HTTP connection */
+ init_connection(conn);
+ conn->connection_type = CONNECTION_TYPE_REQUEST;
+ /* Start with HTTP, WS will be an "upgrade" request later */
+ conn->protocol_type = PROTOCOL_TYPE_HTTP1;
+ process_new_connection(conn);
+ }
+
+ DEBUG_TRACE("%s", "Connection closed");
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_close_time = time(NULL);
+#endif
+ }
+
+ /* Call exit thread user callback */
+ if (ctx->callbacks.exit_thread) {
+ ctx->callbacks.exit_thread(ctx, 1, tls.user_ptr);
+ }
+
+ /* delete thread local storage objects */
+ pthread_setspecific(sTlsKey, NULL);
+#if defined(_WIN32)
+ CloseHandle(tls.pthread_cond_helper_mutex);
+#endif
+ pthread_mutex_destroy(&conn->mutex);
+
+ /* Free the request buffer. */
+ conn->buf_size = 0;
+ mg_free(conn->buf);
+ conn->buf = NULL;
+
+ /* Free cleaned URI (if any) */
+ if (conn->request_info.local_uri != conn->request_info.local_uri_raw) {
+ mg_free((void *)conn->request_info.local_uri);
+ conn->request_info.local_uri = NULL;
+ }
+
+#if defined(USE_SERVER_STATS)
+ conn->conn_state = 9; /* done */
+#endif
+
+ DEBUG_TRACE("%s", "exiting");
+}
+
+
+/* Threads have different return types on Windows and Unix. */
+#if defined(_WIN32)
+static unsigned __stdcall worker_thread(void *thread_func_param)
+{
+ worker_thread_run((struct mg_connection *)thread_func_param);
+ return 0;
+}
+#else
+static void *
+worker_thread(void *thread_func_param)
+{
+#if !defined(__ZEPHYR__)
+ struct sigaction sa;
+
+ /* Ignore SIGPIPE */
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGPIPE, &sa, NULL);
+#endif
+
+ worker_thread_run((struct mg_connection *)thread_func_param);
+ return NULL;
+}
+#endif /* _WIN32 */
+
+
+/* This is an internal function, thus all arguments are expected to be
+ * valid - a NULL check is not required. */
+static void
+accept_new_connection(const struct socket *listener, struct mg_context *ctx)
+{
+ struct socket so;
+ char src_addr[IP_ADDR_STR_LEN];
+ socklen_t len = sizeof(so.rsa);
+#if !defined(__ZEPHYR__)
+ int on = 1;
+#endif
+ memset(&so, 0, sizeof(so));
+
+ if ((so.sock = accept(listener->sock, &so.rsa.sa, &len))
+ == INVALID_SOCKET) {
+ } else if (check_acl(ctx, &so.rsa) != 1) {
+ sockaddr_to_string(src_addr, sizeof(src_addr), &so.rsa);
+ mg_cry_ctx_internal(ctx,
+ "%s: %s is not allowed to connect",
+ __func__,
+ src_addr);
+ closesocket(so.sock);
+ } else {
+ /* Put so socket structure into the queue */
+ DEBUG_TRACE("Accepted socket %d", (int)so.sock);
+ set_close_on_exec(so.sock, NULL, ctx);
+ so.is_ssl = listener->is_ssl;
+ so.ssl_redir = listener->ssl_redir;
+ if (getsockname(so.sock, &so.lsa.sa, &len) != 0) {
+ mg_cry_ctx_internal(ctx,
+ "%s: getsockname() failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+
+#if !defined(__ZEPHYR__)
+ if ((so.lsa.sa.sa_family == AF_INET)
+ || (so.lsa.sa.sa_family == AF_INET6)) {
+ /* Set TCP keep-alive for TCP sockets (IPv4 and IPv6).
+ * This is needed because if HTTP-level keep-alive
+ * is enabled, and client resets the connection, server won't get
+ * TCP FIN or RST and will keep the connection open forever. With
+ * TCP keep-alive, next keep-alive handshake will figure out that
+ * the client is down and will close the server end.
+ * Thanks to Igor Klopov who suggested the patch. */
+ if (setsockopt(so.sock,
+ SOL_SOCKET,
+ SO_KEEPALIVE,
+ (SOCK_OPT_TYPE)&on,
+ sizeof(on))
+ != 0) {
+ mg_cry_ctx_internal(
+ ctx,
+ "%s: setsockopt(SOL_SOCKET SO_KEEPALIVE) failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+ }
+#endif
+
+ /* Disable TCP Nagle's algorithm. Normally TCP packets are coalesced
+ * to effectively fill up the underlying IP packet payload and
+ * reduce the overhead of sending lots of small buffers. However
+ * this hurts the server's throughput (ie. operations per second)
+ * when HTTP 1.1 persistent connections are used and the responses
+ * are relatively small (eg. less than 1400 bytes).
+ */
+ if ((ctx->dd.config[CONFIG_TCP_NODELAY] != NULL)
+ && (!strcmp(ctx->dd.config[CONFIG_TCP_NODELAY], "1"))) {
+ if (set_tcp_nodelay(&so, 1) != 0) {
+ mg_cry_ctx_internal(
+ ctx,
+ "%s: setsockopt(IPPROTO_TCP TCP_NODELAY) failed: %s",
+ __func__,
+ strerror(ERRNO));
+ }
+ }
+
+ /* The "non blocking" property should already be
+ * inherited from the parent socket. Set it for
+ * non-compliant socket implementations. */
+ set_non_blocking_mode(so.sock);
+
+ so.in_use = 0;
+ produce_socket(ctx, &so);
+ }
+}
+
+
+static void
+master_thread_run(struct mg_context *ctx)
+{
+ struct mg_workerTLS tls;
+ struct mg_pollfd *pfd;
+ unsigned int i;
+ unsigned int workerthreadcount;
+
+ if (!ctx) {
+ return;
+ }
+
+ mg_set_thread_name("master");
+
+ /* Increase priority of the master thread */
+#if defined(_WIN32)
+ SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
+#elif defined(USE_MASTER_THREAD_PRIORITY)
+ int min_prio = sched_get_priority_min(SCHED_RR);
+ int max_prio = sched_get_priority_max(SCHED_RR);
+ if ((min_prio >= 0) && (max_prio >= 0)
+ && ((USE_MASTER_THREAD_PRIORITY) <= max_prio)
+ && ((USE_MASTER_THREAD_PRIORITY) >= min_prio)) {
+ struct sched_param sched_param = {0};
+ sched_param.sched_priority = (USE_MASTER_THREAD_PRIORITY);
+ pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
+ }
+#endif
+
+ /* Initialize thread local storage */
+#if defined(_WIN32)
+ tls.pthread_cond_helper_mutex = CreateEvent(NULL, FALSE, FALSE, NULL);
+#endif
+ tls.is_master = 1;
+ pthread_setspecific(sTlsKey, &tls);
+
+ if (ctx->callbacks.init_thread) {
+ /* Callback for the master thread (type 0) */
+ tls.user_ptr = ctx->callbacks.init_thread(ctx, 0);
+ } else {
+ tls.user_ptr = NULL;
+ }
+
+ /* Lua background script "start" event */
+#if defined(USE_LUA)
+ if (ctx->lua_background_state) {
+ lua_State *lstate = (lua_State *)ctx->lua_background_state;
+ pthread_mutex_lock(&ctx->lua_bg_mutex);
+
+ /* call "start()" in Lua */
+ lua_getglobal(lstate, "start");
+ if (lua_type(lstate, -1) == LUA_TFUNCTION) {
+ int ret = lua_pcall(lstate, /* args */ 0, /* results */ 0, 0);
+ if (ret != 0) {
+ struct mg_connection fc;
+ lua_cry(fake_connection(&fc, ctx),
+ ret,
+ lstate,
+ "lua_background_script",
+ "start");
+ }
+ } else {
+ lua_pop(lstate, 1);
+ }
+
+ /* determine if there is a "log()" function in Lua background script */
+ lua_getglobal(lstate, "log");
+ if (lua_type(lstate, -1) == LUA_TFUNCTION) {
+ ctx->lua_bg_log_available = 1;
+ }
+ lua_pop(lstate, 1);
+
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+ }
+#endif
+
+ /* Server starts *now* */
+ ctx->start_time = time(NULL);
+
+ /* Server accept loop */
+ pfd = ctx->listening_socket_fds;
+ while (STOP_FLAG_IS_ZERO(&ctx->stop_flag)) {
+ for (i = 0; i < ctx->num_listening_sockets; i++) {
+ pfd[i].fd = ctx->listening_sockets[i].sock;
+ pfd[i].events = POLLIN;
+ }
+
+ if (mg_poll(pfd,
+ ctx->num_listening_sockets,
+ SOCKET_TIMEOUT_QUANTUM,
+ &(ctx->stop_flag))
+ > 0) {
+ for (i = 0; i < ctx->num_listening_sockets; i++) {
+ /* NOTE(lsm): on QNX, poll() returns POLLRDNORM after the
+ * successful poll, and POLLIN is defined as
+ * (POLLRDNORM | POLLRDBAND)
+ * Therefore, we're checking pfd[i].revents & POLLIN, not
+ * pfd[i].revents == POLLIN. */
+ if (STOP_FLAG_IS_ZERO(&ctx->stop_flag)
+ && (pfd[i].revents & POLLIN)) {
+ accept_new_connection(&ctx->listening_sockets[i], ctx);
+ }
+ }
+ }
+ }
+
+ /* Here stop_flag is 1 - Initiate shutdown. */
+ DEBUG_TRACE("%s", "stopping workers");
+
+ /* Stop signal received: somebody called mg_stop. Quit. */
+ close_all_listening_sockets(ctx);
+
+ /* Wakeup workers that are waiting for connections to handle. */
+#if defined(ALTERNATIVE_QUEUE)
+ for (i = 0; i < ctx->cfg_worker_threads; i++) {
+ event_signal(ctx->client_wait_events[i]);
+ }
+#else
+ (void)pthread_mutex_lock(&ctx->thread_mutex);
+ pthread_cond_broadcast(&ctx->sq_full);
+ (void)pthread_mutex_unlock(&ctx->thread_mutex);
+#endif
+
+ /* Join all worker threads to avoid leaking threads. */
+ workerthreadcount = ctx->cfg_worker_threads;
+ for (i = 0; i < workerthreadcount; i++) {
+ if (ctx->worker_threadids[i] != 0) {
+ mg_join_thread(ctx->worker_threadids[i]);
+ }
+ }
+
+#if defined(USE_LUA)
+ /* Free Lua state of lua background task */
+ if (ctx->lua_background_state) {
+ lua_State *lstate = (lua_State *)ctx->lua_background_state;
+ ctx->lua_bg_log_available = 0;
+
+ /* call "stop()" in Lua */
+ pthread_mutex_lock(&ctx->lua_bg_mutex);
+ lua_getglobal(lstate, "stop");
+ if (lua_type(lstate, -1) == LUA_TFUNCTION) {
+ int ret = lua_pcall(lstate, /* args */ 0, /* results */ 0, 0);
+ if (ret != 0) {
+ struct mg_connection fc;
+ lua_cry(fake_connection(&fc, ctx),
+ ret,
+ lstate,
+ "lua_background_script",
+ "stop");
+ }
+ }
+ DEBUG_TRACE("Close Lua background state %p", lstate);
+ lua_close(lstate);
+
+ ctx->lua_background_state = 0;
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+ }
+#endif
+
+ DEBUG_TRACE("%s", "exiting");
+
+ /* call exit thread callback */
+ if (ctx->callbacks.exit_thread) {
+ /* Callback for the master thread (type 0) */
+ ctx->callbacks.exit_thread(ctx, 0, tls.user_ptr);
+ }
+
+#if defined(_WIN32)
+ CloseHandle(tls.pthread_cond_helper_mutex);
+#endif
+ pthread_setspecific(sTlsKey, NULL);
+
+ /* Signal mg_stop() that we're done.
+ * WARNING: This must be the very last thing this
+ * thread does, as ctx becomes invalid after this line. */
+ STOP_FLAG_ASSIGN(&ctx->stop_flag, 2);
+}
+
+
+/* Threads have different return types on Windows and Unix. */
+#if defined(_WIN32)
+static unsigned __stdcall master_thread(void *thread_func_param)
+{
+ master_thread_run((struct mg_context *)thread_func_param);
+ return 0;
+}
+#else
+static void *
+master_thread(void *thread_func_param)
+{
+#if !defined(__ZEPHYR__)
+ struct sigaction sa;
+
+ /* Ignore SIGPIPE */
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGPIPE, &sa, NULL);
+#endif
+
+ master_thread_run((struct mg_context *)thread_func_param);
+ return NULL;
+}
+#endif /* _WIN32 */
+
+
+static void
+free_context(struct mg_context *ctx)
+{
+ int i;
+ struct mg_handler_info *tmp_rh;
+
+ if (ctx == NULL) {
+ return;
+ }
+
+ /* Call user callback */
+ if (ctx->callbacks.exit_context) {
+ ctx->callbacks.exit_context(ctx);
+ }
+
+ /* All threads exited, no sync is needed. Destroy thread mutex and
+ * condvars
+ */
+ (void)pthread_mutex_destroy(&ctx->thread_mutex);
+
+#if defined(ALTERNATIVE_QUEUE)
+ mg_free(ctx->client_socks);
+ if (ctx->client_wait_events != NULL) {
+ for (i = 0; (unsigned)i < ctx->cfg_worker_threads; i++) {
+ event_destroy(ctx->client_wait_events[i]);
+ }
+ mg_free(ctx->client_wait_events);
+ }
+#else
+ (void)pthread_cond_destroy(&ctx->sq_empty);
+ (void)pthread_cond_destroy(&ctx->sq_full);
+ mg_free(ctx->squeue);
+#endif
+
+ /* Destroy other context global data structures mutex */
+ (void)pthread_mutex_destroy(&ctx->nonce_mutex);
+
+#if defined(USE_LUA)
+ (void)pthread_mutex_destroy(&ctx->lua_bg_mutex);
+#endif
+
+ /* Deallocate config parameters */
+ for (i = 0; i < NUM_OPTIONS; i++) {
+ if (ctx->dd.config[i] != NULL) {
+#if defined(_MSC_VER)
+#pragma warning(suppress : 6001)
+#endif
+ mg_free(ctx->dd.config[i]);
+ }
+ }
+
+ /* Deallocate request handlers */
+ while (ctx->dd.handlers) {
+ tmp_rh = ctx->dd.handlers;
+ ctx->dd.handlers = tmp_rh->next;
+ mg_free(tmp_rh->uri);
+ mg_free(tmp_rh);
+ }
+
+#if defined(USE_MBEDTLS)
+ if (ctx->dd.ssl_ctx != NULL) {
+ mbed_sslctx_uninit(ctx->dd.ssl_ctx);
+ mg_free(ctx->dd.ssl_ctx);
+ ctx->dd.ssl_ctx = NULL;
+ }
+
+#elif !defined(NO_SSL)
+ /* Deallocate SSL context */
+ if (ctx->dd.ssl_ctx != NULL) {
+ void *ssl_ctx = (void *)ctx->dd.ssl_ctx;
+ int callback_ret =
+ (ctx->callbacks.external_ssl_ctx == NULL)
+ ? 0
+ : (ctx->callbacks.external_ssl_ctx(&ssl_ctx, ctx->user_data));
+
+ if (callback_ret == 0) {
+ SSL_CTX_free(ctx->dd.ssl_ctx);
+ }
+ /* else: ignore error and omit SSL_CTX_free in case
+ * callback_ret is 1 */
+ }
+#endif /* !NO_SSL */
+
+ /* Deallocate worker thread ID array */
+ mg_free(ctx->worker_threadids);
+
+ /* Deallocate worker thread ID array */
+ mg_free(ctx->worker_connections);
+
+ /* deallocate system name string */
+ mg_free(ctx->systemName);
+
+ /* Deallocate context itself */
+ mg_free(ctx);
+}
+
+
+CIVETWEB_API void
+mg_stop(struct mg_context *ctx)
+{
+ pthread_t mt;
+ if (!ctx) {
+ return;
+ }
+
+ /* We don't use a lock here. Calling mg_stop with the same ctx from
+ * two threads is not allowed. */
+ mt = ctx->masterthreadid;
+ if (mt == 0) {
+ return;
+ }
+
+ ctx->masterthreadid = 0;
+
+ /* Set stop flag, so all threads know they have to exit. */
+ STOP_FLAG_ASSIGN(&ctx->stop_flag, 1);
+
+ /* Join timer thread */
+#if defined(USE_TIMERS)
+ timers_exit(ctx);
+#endif
+
+ /* Wait until everything has stopped. */
+ while (!STOP_FLAG_IS_TWO(&ctx->stop_flag)) {
+ (void)mg_sleep(10);
+ }
+
+ /* Wait to stop master thread */
+ mg_join_thread(mt);
+
+ /* Close remaining Lua states */
+#if defined(USE_LUA)
+ lua_ctx_exit(ctx);
+#endif
+
+ /* Free memory */
+ free_context(ctx);
+}
+
+
+static void
+get_system_name(char **sysName)
+{
+#if defined(_WIN32)
+ char name[128];
+ DWORD dwVersion = 0;
+ DWORD dwMajorVersion = 0;
+ DWORD dwMinorVersion = 0;
+ DWORD dwBuild = 0;
+ BOOL wowRet, isWoW = FALSE;
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+ /* GetVersion was declared deprecated */
+#pragma warning(disable : 4996)
+#endif
+ dwVersion = GetVersion();
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+ dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
+ dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));
+ dwBuild = ((dwVersion < 0x80000000) ? (DWORD)(HIWORD(dwVersion)) : 0);
+ (void)dwBuild;
+
+ wowRet = IsWow64Process(GetCurrentProcess(), &isWoW);
+
+ sprintf(name,
+ "Windows %u.%u%s",
+ (unsigned)dwMajorVersion,
+ (unsigned)dwMinorVersion,
+ (wowRet ? (isWoW ? " (WoW64)" : "") : " (?)"));
+
+ *sysName = mg_strdup(name);
+
+#elif defined(__ZEPHYR__)
+ *sysName = mg_strdup("Zephyr OS");
+#else
+ struct utsname name;
+ memset(&name, 0, sizeof(name));
+ uname(&name);
+ *sysName = mg_strdup(name.sysname);
+#endif
+}
+
+
+static void
+legacy_init(const char **options)
+{
+ const char *ports_option = config_options[LISTENING_PORTS].default_value;
+
+ if (options) {
+ const char **run_options = options;
+ const char *optname = config_options[LISTENING_PORTS].name;
+
+ /* Try to find the "listening_ports" option */
+ while (*run_options) {
+ if (!strcmp(*run_options, optname)) {
+ ports_option = run_options[1];
+ }
+ run_options += 2;
+ }
+ }
+
+ if (is_ssl_port_used(ports_option)) {
+ /* Initialize with SSL support */
+ mg_init_library(MG_FEATURES_TLS);
+ } else {
+ /* Initialize without SSL support */
+ mg_init_library(MG_FEATURES_DEFAULT);
+ }
+}
+
+
+CIVETWEB_API struct mg_context *
+mg_start2(struct mg_init_data *init, struct mg_error_data *error)
+{
+ struct mg_context *ctx;
+ const char *name, *value, *default_value;
+ int idx, ok, workerthreadcount;
+ unsigned int i;
+ int itmp;
+ void (*exit_callback)(const struct mg_context *ctx) = 0;
+ const char **options =
+ ((init != NULL) ? (init->configuration_options) : (NULL));
+
+ struct mg_workerTLS tls;
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OK;
+ error->code_sub = 0;
+ if (error->text_buffer_size > 0) {
+ *error->text = 0;
+ }
+ }
+
+ if (mg_init_library_called == 0) {
+ /* Legacy INIT, if mg_start is called without mg_init_library.
+ * Note: This will cause a memory leak when unloading the library.
+ */
+ legacy_init(options);
+ }
+ if (mg_init_library_called == 0) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_LIBRARY_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Library uninitialized");
+ }
+ return NULL;
+ }
+
+ /* Allocate context and initialize reasonable general case defaults. */
+ ctx = (struct mg_context *)mg_calloc(1, sizeof(*ctx));
+ if (ctx == NULL) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)sizeof(*ctx);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Out of memory");
+ }
+ return NULL;
+ }
+
+ /* Random number generator will initialize at the first call */
+ ctx->dd.auth_nonce_mask =
+ (uint64_t)get_random() ^ (uint64_t)(ptrdiff_t)(options);
+
+ /* Save started thread index to reuse in other external API calls
+ * For the sake of thread synchronization all non-civetweb threads
+ * can be considered as single external thread */
+ ctx->starter_thread_idx = (unsigned)mg_atomic_inc(&thread_idx_max);
+ tls.is_master = -1; /* Thread calling mg_start */
+ tls.thread_idx = ctx->starter_thread_idx;
+#if defined(_WIN32)
+ tls.pthread_cond_helper_mutex = NULL;
+#endif
+ pthread_setspecific(sTlsKey, &tls);
+
+ ok = (0 == pthread_mutex_init(&ctx->thread_mutex, &pthread_mutex_attr));
+#if !defined(ALTERNATIVE_QUEUE)
+ ok &= (0 == pthread_cond_init(&ctx->sq_empty, NULL));
+ ok &= (0 == pthread_cond_init(&ctx->sq_full, NULL));
+ ctx->sq_blocked = 0;
+#endif
+ ok &= (0 == pthread_mutex_init(&ctx->nonce_mutex, &pthread_mutex_attr));
+#if defined(USE_LUA)
+ ok &= (0 == pthread_mutex_init(&ctx->lua_bg_mutex, &pthread_mutex_attr));
+#endif
+ if (!ok) {
+ unsigned error_id = (unsigned)ERRNO;
+ const char *err_msg =
+ "Cannot initialize thread synchronization objects";
+ /* Fatal error - abort start. However, this situation should never
+ * occur in practice. */
+
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = error_id;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ mg_free(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ if ((init != NULL) && (init->callbacks != NULL)) {
+ /* Set all callbacks except exit_context. */
+ ctx->callbacks = *init->callbacks;
+ exit_callback = init->callbacks->exit_context;
+ /* The exit callback is activated once the context is successfully
+ * created. It should not be called, if an incomplete context object
+ * is deleted during a failed initialization. */
+ ctx->callbacks.exit_context = 0;
+ }
+ ctx->user_data = ((init != NULL) ? (init->user_data) : (NULL));
+ ctx->dd.handlers = NULL;
+ ctx->dd.next = NULL;
+
+#if defined(USE_LUA)
+ lua_ctx_init(ctx);
+#endif
+
+ /* Store options */
+ while (options && (name = *options++) != NULL) {
+ idx = get_option_index(name);
+ if (idx == -1) {
+ mg_cry_ctx_internal(ctx, "Invalid option: %s", name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)-1;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option: %s",
+ name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+
+ } else if ((value = *options++) == NULL) {
+ mg_cry_ctx_internal(ctx, "%s: option value cannot be NULL", name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)idx;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option value: %s",
+ name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ if (ctx->dd.config[idx] != NULL) {
+ /* A duplicate configuration option is not an error - the last
+ * option value will be used. */
+ mg_cry_ctx_internal(ctx, "warning: %s: duplicate option", name);
+ mg_free(ctx->dd.config[idx]);
+ }
+ ctx->dd.config[idx] = mg_strdup_ctx(value, ctx);
+ DEBUG_TRACE("[%s] -> [%s]", name, value);
+ }
+
+ /* Set default value if needed */
+ for (i = 0; config_options[i].name != NULL; i++) {
+ default_value = config_options[i].default_value;
+ if ((ctx->dd.config[i] == NULL) && (default_value != NULL)) {
+ ctx->dd.config[i] = mg_strdup_ctx(default_value, ctx);
+ }
+ }
+
+ /* Request size option */
+ itmp = atoi(ctx->dd.config[MAX_REQUEST_SIZE]);
+ if (itmp < 1024) {
+ mg_cry_ctx_internal(ctx,
+ "%s too small",
+ config_options[MAX_REQUEST_SIZE].name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)MAX_REQUEST_SIZE;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option value: %s",
+ config_options[MAX_REQUEST_SIZE].name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ ctx->max_request_size = (unsigned)itmp;
+
+ /* Queue length */
+#if !defined(ALTERNATIVE_QUEUE)
+ itmp = atoi(ctx->dd.config[CONNECTION_QUEUE_SIZE]);
+ if (itmp < 1) {
+ mg_cry_ctx_internal(ctx,
+ "%s too small",
+ config_options[CONNECTION_QUEUE_SIZE].name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = CONNECTION_QUEUE_SIZE;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option value: %s",
+ config_options[CONNECTION_QUEUE_SIZE].name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ ctx->squeue =
+ (struct socket *)mg_calloc((unsigned int)itmp, sizeof(struct socket));
+ if (ctx->squeue == NULL) {
+ mg_cry_ctx_internal(ctx,
+ "Out of memory: Cannot allocate %s",
+ config_options[CONNECTION_QUEUE_SIZE].name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)itmp * (unsigned)sizeof(struct socket);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Out of memory: Cannot allocate %s",
+ config_options[CONNECTION_QUEUE_SIZE].name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ ctx->sq_size = itmp;
+#endif
+
+ /* Worker thread count option */
+ workerthreadcount = atoi(ctx->dd.config[NUM_THREADS]);
+
+ if ((workerthreadcount > MAX_WORKER_THREADS) || (workerthreadcount <= 0)) {
+ if (workerthreadcount <= 0) {
+ mg_cry_ctx_internal(ctx, "%s", "Invalid number of worker threads");
+ } else {
+ mg_cry_ctx_internal(ctx, "%s", "Too many worker threads");
+ }
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = NUM_THREADS;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option value: %s",
+ config_options[NUM_THREADS].name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ /* Document root */
+#if defined(NO_FILES)
+ if (ctx->dd.config[DOCUMENT_ROOT] != NULL) {
+ mg_cry_ctx_internal(ctx, "%s", "Document root must not be set");
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)DOCUMENT_ROOT;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid configuration option value: %s",
+ config_options[DOCUMENT_ROOT].name);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+#endif
+
+ get_system_name(&ctx->systemName);
+
+#if defined(USE_LUA)
+ /* If a Lua background script has been configured, start it. */
+ ctx->lua_bg_log_available = 0;
+ if (ctx->dd.config[LUA_BACKGROUND_SCRIPT] != NULL) {
+ char ebuf[256];
+ struct vec opt_vec;
+ struct vec eq_vec;
+ const char *sparams;
+
+ memset(ebuf, 0, sizeof(ebuf));
+ pthread_mutex_lock(&ctx->lua_bg_mutex);
+
+ /* Create a Lua state, load all standard libraries and the mg table */
+ lua_State *state = mg_lua_context_script_prepare(
+ ctx->dd.config[LUA_BACKGROUND_SCRIPT], ctx, ebuf, sizeof(ebuf));
+ if (!state) {
+ mg_cry_ctx_internal(ctx,
+ "lua_background_script load error: %s",
+ ebuf);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_SCRIPT_ERROR;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Error in script %s: %s",
+ config_options[LUA_BACKGROUND_SCRIPT].name,
+ ebuf);
+ }
+
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ /* Add a table with parameters into mg.params */
+ sparams = ctx->dd.config[LUA_BACKGROUND_SCRIPT_PARAMS];
+ if (sparams && sparams[0]) {
+ lua_getglobal(state, "mg");
+ lua_pushstring(state, "params");
+ lua_newtable(state);
+
+ while ((sparams = next_option(sparams, &opt_vec, &eq_vec))
+ != NULL) {
+ reg_llstring(
+ state, opt_vec.ptr, opt_vec.len, eq_vec.ptr, eq_vec.len);
+ if (mg_strncasecmp(sparams, opt_vec.ptr, opt_vec.len) == 0)
+ break;
+ }
+ lua_rawset(state, -3);
+ lua_pop(state, 1);
+ }
+
+ /* Call script */
+ state = mg_lua_context_script_run(state,
+ ctx->dd.config[LUA_BACKGROUND_SCRIPT],
+ ctx,
+ ebuf,
+ sizeof(ebuf));
+ if (!state) {
+ mg_cry_ctx_internal(ctx,
+ "lua_background_script start error: %s",
+ ebuf);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_SCRIPT_ERROR;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Error in script %s: %s",
+ config_options[DOCUMENT_ROOT].name,
+ ebuf);
+ }
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ /* state remains valid */
+ ctx->lua_background_state = (void *)state;
+ pthread_mutex_unlock(&ctx->lua_bg_mutex);
+
+ } else {
+ ctx->lua_background_state = 0;
+ }
+#endif
+
+ /* Step by step initialization of ctx - depending on build options */
+#if !defined(NO_FILESYSTEMS)
+ if (!set_gpass_option(ctx, NULL)) {
+ const char *err_msg = "Invalid global password file";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PASS_FILE;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+#endif
+
+#if defined(USE_MBEDTLS)
+ if (!mg_sslctx_init(ctx, NULL)) {
+ const char *err_msg = "Error initializing SSL context";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_TLS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+#elif !defined(NO_SSL)
+ if (!init_ssl_ctx(ctx, NULL)) {
+ const char *err_msg = "Error initializing SSL context";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_TLS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+#endif
+
+ if (!set_ports_option(ctx)) {
+ const char *err_msg = "Failed to setup server ports";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_PORTS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+#if !defined(_WIN32) && !defined(__ZEPHYR__)
+ if (!set_uid_option(ctx)) {
+ const char *err_msg = "Failed to run as configured user";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_USER_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+#endif
+
+ if (!set_acl_option(ctx)) {
+ const char *err_msg = "Failed to setup access control list";
+ /* Fatal error - abort start. */
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_ACL_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ ctx->cfg_worker_threads = ((unsigned int)(workerthreadcount));
+ ctx->worker_threadids = (pthread_t *)mg_calloc_ctx(ctx->cfg_worker_threads,
+ sizeof(pthread_t),
+ ctx);
+
+ if (ctx->worker_threadids == NULL) {
+ const char *err_msg = "Not enough memory for worker thread ID array";
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub =
+ (unsigned)ctx->cfg_worker_threads * (unsigned)sizeof(pthread_t);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ ctx->worker_connections =
+ (struct mg_connection *)mg_calloc_ctx(ctx->cfg_worker_threads,
+ sizeof(struct mg_connection),
+ ctx);
+ if (ctx->worker_connections == NULL) {
+ const char *err_msg =
+ "Not enough memory for worker thread connection array";
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)ctx->cfg_worker_threads
+ * (unsigned)sizeof(struct mg_connection);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+#if defined(ALTERNATIVE_QUEUE)
+ ctx->client_wait_events =
+ (void **)mg_calloc_ctx(ctx->cfg_worker_threads,
+ sizeof(ctx->client_wait_events[0]),
+ ctx);
+ if (ctx->client_wait_events == NULL) {
+ const char *err_msg = "Not enough memory for worker event array";
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+ mg_free(ctx->worker_threadids);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)ctx->cfg_worker_threads
+ * (unsigned)sizeof(ctx->client_wait_events[0]);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ ctx->client_socks =
+ (struct socket *)mg_calloc_ctx(ctx->cfg_worker_threads,
+ sizeof(ctx->client_socks[0]),
+ ctx);
+ if (ctx->client_socks == NULL) {
+ const char *err_msg = "Not enough memory for worker socket array";
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+ mg_free(ctx->client_wait_events);
+ mg_free(ctx->worker_threadids);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)ctx->cfg_worker_threads
+ * (unsigned)sizeof(ctx->client_socks[0]);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+
+ for (i = 0; (unsigned)i < ctx->cfg_worker_threads; i++) {
+ ctx->client_wait_events[i] = event_create();
+ if (ctx->client_wait_events[i] == 0) {
+ const char *err_msg = "Error creating worker event %i";
+ mg_cry_ctx_internal(ctx, err_msg, i);
+ while (i > 0) {
+ i--;
+ event_destroy(ctx->client_wait_events[i]);
+ }
+ mg_free(ctx->client_socks);
+ mg_free(ctx->client_wait_events);
+ mg_free(ctx->worker_threadids);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ err_msg,
+ i);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ }
+#endif
+
+#if defined(USE_TIMERS)
+ if (timers_init(ctx) != 0) {
+ const char *err_msg = "Error creating timers";
+ mg_cry_ctx_internal(ctx, "%s", err_msg);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)ERRNO;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ err_msg);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+#endif
+
+ /* Context has been created - init user libraries */
+ if (ctx->callbacks.init_context) {
+ ctx->callbacks.init_context(ctx);
+ }
+
+ /* From now, the context is successfully created.
+ * When it is destroyed, the exit callback should be called. */
+ ctx->callbacks.exit_context = exit_callback;
+ ctx->context_type = CONTEXT_SERVER; /* server context */
+
+ /* Start worker threads */
+ for (i = 0; i < ctx->cfg_worker_threads; i++) {
+ /* worker_thread sets up the other fields */
+ ctx->worker_connections[i].phys_ctx = ctx;
+ if (mg_start_thread_with_id(worker_thread,
+ &ctx->worker_connections[i],
+ &ctx->worker_threadids[i])
+ != 0) {
+
+ long error_no = (long)ERRNO;
+
+ /* thread was not created */
+ if (i > 0) {
+ /* If the second, third, ... thread cannot be created, set a
+ * warning, but keep running. */
+ mg_cry_ctx_internal(ctx,
+ "Cannot start worker thread %i: error %ld",
+ i + 1,
+ error_no);
+
+ /* If the server initialization should stop here, all
+ * threads that have already been created must be stopped
+ * first, before any free_context(ctx) call.
+ */
+
+ } else {
+ /* If the first worker thread cannot be created, stop
+ * initialization and free the entire server context. */
+ mg_cry_ctx_internal(ctx,
+ "Cannot create threads: error %ld",
+ error_no);
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OS_ERROR;
+ error->code_sub = (unsigned)error_no;
+ mg_snprintf(
+ NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Cannot create first worker thread: error %ld",
+ error_no);
+ }
+
+ free_context(ctx);
+ pthread_setspecific(sTlsKey, NULL);
+ return NULL;
+ }
+ break;
+ }
+ }
+
+ /* Start master (listening) thread */
+ mg_start_thread_with_id(master_thread, ctx, &ctx->masterthreadid);
+
+ pthread_setspecific(sTlsKey, NULL);
+ return ctx;
+}
+
+
+CIVETWEB_API struct mg_context *
+mg_start(const struct mg_callbacks *callbacks,
+ void *user_data,
+ const char **options)
+{
+ struct mg_init_data init = {0};
+ init.callbacks = callbacks;
+ init.user_data = user_data;
+ init.configuration_options = options;
+
+ return mg_start2(&init, NULL);
+}
+
+
+/* Add an additional domain to an already running web server. */
+CIVETWEB_API int
+mg_start_domain2(struct mg_context *ctx,
+ const char **options,
+ struct mg_error_data *error)
+{
+ const char *name;
+ const char *value;
+ const char *default_value;
+ struct mg_domain_context *new_dom;
+ struct mg_domain_context *dom;
+ int idx, i;
+
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OK;
+ error->code_sub = 0;
+ if (error->text_buffer_size > 0) {
+ *error->text = 0;
+ }
+ }
+
+ if ((ctx == NULL) || (options == NULL)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_PARAM;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Invalid parameters");
+ }
+ return -1;
+ }
+
+ if (!STOP_FLAG_IS_ZERO(&ctx->stop_flag)) {
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_SERVER_STOPPED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Server already stopped");
+ }
+ return -7;
+ }
+
+ new_dom = (struct mg_domain_context *)
+ mg_calloc_ctx(1, sizeof(struct mg_domain_context), ctx);
+
+ if (!new_dom) {
+ /* Out of memory */
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_OUT_OF_MEMORY;
+ error->code_sub = (unsigned)sizeof(struct mg_domain_context);
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Out or memory");
+ }
+ return -6;
+ }
+
+ /* Store options - TODO: unite duplicate code */
+ while (options && (name = *options++) != NULL) {
+ idx = get_option_index(name);
+ if (idx == -1) {
+ mg_cry_ctx_internal(ctx, "Invalid option: %s", name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)-1;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid option: %s",
+ name);
+ }
+ mg_free(new_dom);
+ return -2;
+ } else if ((value = *options++) == NULL) {
+ mg_cry_ctx_internal(ctx, "%s: option value cannot be NULL", name);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INVALID_OPTION;
+ error->code_sub = (unsigned)idx;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Invalid option value: %s",
+ name);
+ }
+ mg_free(new_dom);
+ return -2;
+ }
+ if (new_dom->config[idx] != NULL) {
+ /* Duplicate option: Later values overwrite earlier ones. */
+ mg_cry_ctx_internal(ctx, "warning: %s: duplicate option", name);
+ mg_free(new_dom->config[idx]);
+ }
+ new_dom->config[idx] = mg_strdup_ctx(value, ctx);
+ DEBUG_TRACE("[%s] -> [%s]", name, value);
+ }
+
+ /* Authentication domain is mandatory */
+ /* TODO: Maybe use a new option hostname? */
+ if (!new_dom->config[AUTHENTICATION_DOMAIN]) {
+ mg_cry_ctx_internal(ctx, "%s", "authentication domain required");
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_MISSING_OPTION;
+ error->code_sub = AUTHENTICATION_DOMAIN;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Mandatory option %s missing",
+ config_options[AUTHENTICATION_DOMAIN].name);
+ }
+ mg_free(new_dom);
+ return -4;
+ }
+
+ /* Set default value if needed. Take the config value from
+ * ctx as a default value. */
+ for (i = 0; config_options[i].name != NULL; i++) {
+ default_value = ctx->dd.config[i];
+ if ((new_dom->config[i] == NULL) && (default_value != NULL)) {
+ new_dom->config[i] = mg_strdup_ctx(default_value, ctx);
+ }
+ }
+
+ new_dom->handlers = NULL;
+ new_dom->next = NULL;
+ new_dom->nonce_count = 0;
+ new_dom->auth_nonce_mask = get_random() ^ (get_random() << 31);
+
+#if defined(USE_LUA) && defined(USE_WEBSOCKET)
+ new_dom->shared_lua_websockets = NULL;
+#endif
+
+#if !defined(NO_SSL) && !defined(USE_MBEDTLS)
+ if (!init_ssl_ctx(ctx, new_dom)) {
+ /* Init SSL failed */
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_INIT_TLS_FAILED;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "%s",
+ "Initializing SSL context failed");
+ }
+ mg_free(new_dom);
+ return -3;
+ }
+#endif
+
+ /* Add element to linked list. */
+ mg_lock_context(ctx);
+
+ idx = 0;
+ dom = &(ctx->dd);
+ for (;;) {
+ if (!mg_strcasecmp(new_dom->config[AUTHENTICATION_DOMAIN],
+ dom->config[AUTHENTICATION_DOMAIN])) {
+ /* Domain collision */
+ mg_cry_ctx_internal(ctx,
+ "domain %s already in use",
+ new_dom->config[AUTHENTICATION_DOMAIN]);
+ if (error != NULL) {
+ error->code = MG_ERROR_DATA_CODE_DUPLICATE_DOMAIN;
+ mg_snprintf(NULL,
+ NULL, /* No truncation check for error buffers */
+ error->text,
+ error->text_buffer_size,
+ "Domain %s specified by %s is already in use",
+ new_dom->config[AUTHENTICATION_DOMAIN],
+ config_options[AUTHENTICATION_DOMAIN].name);
+ }
+ mg_free(new_dom);
+ mg_unlock_context(ctx);
+ return -5;
+ }
+
+ /* Count number of domains */
+ idx++;
+
+ if (dom->next == NULL) {
+ dom->next = new_dom;
+ break;
+ }
+ dom = dom->next;
+ }
+
+ mg_unlock_context(ctx);
+
+ /* Return domain number */
+ return idx;
+}
+
+
+CIVETWEB_API int
+mg_start_domain(struct mg_context *ctx, const char **options)
+{
+ return mg_start_domain2(ctx, options, NULL);
+}
+
+
+/* Feature check API function */
+CIVETWEB_API unsigned
+mg_check_feature(unsigned feature)
+{
+ static const unsigned feature_set = 0
+ /* Set bits for available features according to API documentation.
+ * This bit mask is created at compile time, according to the active
+ * preprocessor defines. It is a single const value at runtime. */
+#if !defined(NO_FILES)
+ | MG_FEATURES_FILES
+#endif
+#if !defined(NO_SSL) || defined(USE_MBEDTLS)
+ | MG_FEATURES_SSL
+#endif
+#if !defined(NO_CGI)
+ | MG_FEATURES_CGI
+#endif
+#if defined(USE_IPV6)
+ | MG_FEATURES_IPV6
+#endif
+#if defined(USE_WEBSOCKET)
+ | MG_FEATURES_WEBSOCKET
+#endif
+#if defined(USE_LUA)
+ | MG_FEATURES_LUA
+#endif
+#if defined(USE_DUKTAPE)
+ | MG_FEATURES_SSJS
+#endif
+#if !defined(NO_CACHING)
+ | MG_FEATURES_CACHE
+#endif
+#if defined(USE_SERVER_STATS)
+ | MG_FEATURES_STATS
+#endif
+#if defined(USE_ZLIB)
+ | MG_FEATURES_COMPRESSION
+#endif
+#if defined(USE_HTTP2)
+ | MG_FEATURES_HTTP2
+#endif
+#if defined(USE_X_DOM_SOCKET)
+ | MG_FEATURES_X_DOMAIN_SOCKET
+#endif
+
+ /* Set some extra bits not defined in the API documentation.
+ * These bits may change without further notice. */
+#if defined(MG_LEGACY_INTERFACE)
+ | 0x80000000u
+#endif
+#if defined(MG_EXPERIMENTAL_INTERFACES)
+ | 0x40000000u
+#endif
+#if !defined(NO_RESPONSE_BUFFERING)
+ | 0x20000000u
+#endif
+#if defined(MEMORY_DEBUGGING)
+ | 0x10000000u
+#endif
+ ;
+ return (feature & feature_set);
+}
+
+
+static size_t
+mg_str_append(char **dst, char *end, const char *src)
+{
+ size_t len = strlen(src);
+ if (*dst != end) {
+ /* Append src if enough space, or close dst. */
+ if ((size_t)(end - *dst) > len) {
+ strcpy(*dst, src);
+ *dst += len;
+ } else {
+ *dst = end;
+ }
+ }
+ return len;
+}
+
+
+/* Get system information. It can be printed or stored by the caller.
+ * Return the size of available information. */
+CIVETWEB_API int
+mg_get_system_info(char *buffer, int buflen)
+{
+ char *end, *append_eoobj = NULL, block[256];
+ size_t system_info_length = 0;
+
+#if defined(_WIN32)
+ static const char eol[] = "\r\n", eoobj[] = "\r\n}\r\n";
+#else
+ static const char eol[] = "\n", eoobj[] = "\n}\n";
+#endif
+
+ if ((buffer == NULL) || (buflen < 1)) {
+ buflen = 0;
+ end = buffer;
+ } else {
+ *buffer = 0;
+ end = buffer + buflen;
+ }
+ if (buflen > (int)(sizeof(eoobj) - 1)) {
+ /* has enough space to append eoobj */
+ append_eoobj = buffer;
+ if (end) {
+ end -= sizeof(eoobj) - 1;
+ }
+ }
+
+ system_info_length += mg_str_append(&buffer, end, "{");
+
+ /* Server version */
+ {
+ const char *version = mg_version();
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s\"version\" : \"%s\"",
+ eol,
+ version);
+ system_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* System info */
+ {
+#if defined(_WIN32)
+ DWORD dwVersion = 0;
+ DWORD dwMajorVersion = 0;
+ DWORD dwMinorVersion = 0;
+ SYSTEM_INFO si;
+
+ GetSystemInfo(&si);
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+ /* GetVersion was declared deprecated */
+#pragma warning(disable : 4996)
+#endif
+ dwVersion = GetVersion();
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+ dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
+ dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"os\" : \"Windows %u.%u\"",
+ eol,
+ (unsigned)dwMajorVersion,
+ (unsigned)dwMinorVersion);
+ system_info_length += mg_str_append(&buffer, end, block);
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"cpu\" : \"type %u, cores %u, mask %x\"",
+ eol,
+ (unsigned)si.wProcessorArchitecture,
+ (unsigned)si.dwNumberOfProcessors,
+ (unsigned)si.dwActiveProcessorMask);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__ZEPHYR__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"os\" : \"%s %s\"",
+ eol,
+ "Zephyr OS",
+ ZEPHYR_VERSION);
+ system_info_length += mg_str_append(&buffer, end, block);
+#else
+ struct utsname name;
+ memset(&name, 0, sizeof(name));
+ uname(&name);
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"os\" : \"%s %s (%s) - %s\"",
+ eol,
+ name.sysname,
+ name.version,
+ name.release,
+ name.machine);
+ system_info_length += mg_str_append(&buffer, end, block);
+#endif
+ }
+
+ /* Features */
+ {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"features\" : %lu"
+ ",%s\"feature_list\" : \"Server:%s%s%s%s%s%s%s%s%s\"",
+ eol,
+ (unsigned long)mg_check_feature(0xFFFFFFFFu),
+ eol,
+ mg_check_feature(MG_FEATURES_FILES) ? " Files" : "",
+ mg_check_feature(MG_FEATURES_SSL) ? " HTTPS" : "",
+ mg_check_feature(MG_FEATURES_CGI) ? " CGI" : "",
+ mg_check_feature(MG_FEATURES_IPV6) ? " IPv6" : "",
+ mg_check_feature(MG_FEATURES_WEBSOCKET) ? " WebSockets"
+ : "",
+ mg_check_feature(MG_FEATURES_LUA) ? " Lua" : "",
+ mg_check_feature(MG_FEATURES_SSJS) ? " JavaScript" : "",
+ mg_check_feature(MG_FEATURES_CACHE) ? " Cache" : "",
+ mg_check_feature(MG_FEATURES_STATS) ? " Stats" : "");
+ system_info_length += mg_str_append(&buffer, end, block);
+
+#if defined(USE_LUA)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"lua_version\" : \"%u (%s)\"",
+ eol,
+ (unsigned)LUA_VERSION_NUM,
+ LUA_RELEASE);
+ system_info_length += mg_str_append(&buffer, end, block);
+#endif
+#if defined(USE_DUKTAPE)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"javascript\" : \"Duktape %u.%u.%u\"",
+ eol,
+ (unsigned)DUK_VERSION / 10000,
+ ((unsigned)DUK_VERSION / 100) % 100,
+ (unsigned)DUK_VERSION % 100);
+ system_info_length += mg_str_append(&buffer, end, block);
+#endif
+ }
+
+ /* Build identifier. If BUILD_DATE is not set, __DATE__ will be used. */
+ {
+#if defined(BUILD_DATE)
+ const char *bd = BUILD_DATE;
+#else
+#if defined(GCC_DIAGNOSTIC)
+#if GCC_VERSION >= 40900
+#pragma GCC diagnostic push
+ /* Disable idiotic compiler warning -Wdate-time, appeared in gcc5. This
+ * does not work in some versions. If "BUILD_DATE" is defined to some
+ * string, it is used instead of __DATE__. */
+#pragma GCC diagnostic ignored "-Wdate-time"
+#endif
+#endif
+ const char *bd = __DATE__;
+#if defined(GCC_DIAGNOSTIC)
+#if GCC_VERSION >= 40900
+#pragma GCC diagnostic pop
+#endif
+#endif
+#endif
+
+ mg_snprintf(
+ NULL, NULL, block, sizeof(block), ",%s\"build\" : \"%s\"", eol, bd);
+
+ system_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Compiler information */
+ /* http://sourceforge.net/p/predef/wiki/Compilers/ */
+ {
+#if defined(_MSC_VER)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"MSC: %u (%u)\"",
+ eol,
+ (unsigned)_MSC_VER,
+ (unsigned)_MSC_FULL_VER);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__MINGW64__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"MinGW64: %u.%u\"",
+ eol,
+ (unsigned)__MINGW64_VERSION_MAJOR,
+ (unsigned)__MINGW64_VERSION_MINOR);
+ system_info_length += mg_str_append(&buffer, end, block);
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"MinGW32: %u.%u\"",
+ eol,
+ (unsigned)__MINGW32_MAJOR_VERSION,
+ (unsigned)__MINGW32_MINOR_VERSION);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__MINGW32__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"MinGW32: %u.%u\"",
+ eol,
+ (unsigned)__MINGW32_MAJOR_VERSION,
+ (unsigned)__MINGW32_MINOR_VERSION);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__clang__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"clang: %u.%u.%u (%s)\"",
+ eol,
+ __clang_major__,
+ __clang_minor__,
+ __clang_patchlevel__,
+ __clang_version__);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__GNUC__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"gcc: %u.%u.%u\"",
+ eol,
+ (unsigned)__GNUC__,
+ (unsigned)__GNUC_MINOR__,
+ (unsigned)__GNUC_PATCHLEVEL__);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__INTEL_COMPILER)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"Intel C/C++: %u\"",
+ eol,
+ (unsigned)__INTEL_COMPILER);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__BORLANDC__)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"Borland C: 0x%x\"",
+ eol,
+ (unsigned)__BORLANDC__);
+ system_info_length += mg_str_append(&buffer, end, block);
+#elif defined(__SUNPRO_C)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"Solaris: 0x%x\"",
+ eol,
+ (unsigned)__SUNPRO_C);
+ system_info_length += mg_str_append(&buffer, end, block);
+#else
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"compiler\" : \"other\"",
+ eol);
+ system_info_length += mg_str_append(&buffer, end, block);
+#endif
+ }
+
+ /* Determine 32/64 bit data mode.
+ * see https://en.wikipedia.org/wiki/64-bit_computing */
+ {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"data_model\" : \"int:%u/%u/%u/%u, float:%u/%u/%u, "
+ "char:%u/%u, "
+ "ptr:%u, size:%u, time:%u\"",
+ eol,
+ (unsigned)sizeof(short),
+ (unsigned)sizeof(int),
+ (unsigned)sizeof(long),
+ (unsigned)sizeof(long long),
+ (unsigned)sizeof(float),
+ (unsigned)sizeof(double),
+ (unsigned)sizeof(long double),
+ (unsigned)sizeof(char),
+ (unsigned)sizeof(wchar_t),
+ (unsigned)sizeof(void *),
+ (unsigned)sizeof(size_t),
+ (unsigned)sizeof(time_t));
+ system_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Terminate string */
+ if (append_eoobj) {
+ strcat(append_eoobj, eoobj);
+ }
+ system_info_length += sizeof(eoobj) - 1;
+
+ return (int)system_info_length;
+}
+
+
+/* Get context information. It can be printed or stored by the caller.
+ * Return the size of available information. */
+CIVETWEB_API int
+mg_get_context_info(const struct mg_context *ctx, char *buffer, int buflen)
+{
+#if defined(USE_SERVER_STATS)
+ char *end, *append_eoobj = NULL, block[256];
+ size_t context_info_length = 0;
+
+#if defined(_WIN32)
+ static const char eol[] = "\r\n", eoobj[] = "\r\n}\r\n";
+#else
+ static const char eol[] = "\n", eoobj[] = "\n}\n";
+#endif
+ struct mg_memory_stat *ms = get_memory_stat((struct mg_context *)ctx);
+
+ if ((buffer == NULL) || (buflen < 1)) {
+ buflen = 0;
+ end = buffer;
+ } else {
+ *buffer = 0;
+ end = buffer + buflen;
+ }
+ if (buflen > (int)(sizeof(eoobj) - 1)) {
+ /* has enough space to append eoobj */
+ append_eoobj = buffer;
+ end -= sizeof(eoobj) - 1;
+ }
+
+ context_info_length += mg_str_append(&buffer, end, "{");
+
+ if (ms) { /* <-- should be always true */
+ /* Memory information */
+ int blockCount = (int)ms->blockCount;
+ int64_t totalMemUsed = ms->totalMemUsed;
+ int64_t maxMemUsed = ms->maxMemUsed;
+ if (totalMemUsed > maxMemUsed) {
+ maxMemUsed = totalMemUsed;
+ }
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s\"memory\" : {%s"
+ "\"blocks\" : %i,%s"
+ "\"used\" : %" INT64_FMT ",%s"
+ "\"maxUsed\" : %" INT64_FMT "%s"
+ "}",
+ eol,
+ eol,
+ blockCount,
+ eol,
+ totalMemUsed,
+ eol,
+ maxMemUsed,
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ if (ctx) {
+ /* Declare all variables at begin of the block, to comply
+ * with old C standards. */
+ char start_time_str[64] = {0};
+ char now_str[64] = {0};
+ time_t start_time = ctx->start_time;
+ time_t now = time(NULL);
+ int64_t total_data_read, total_data_written;
+ int active_connections = (int)ctx->active_connections;
+ int max_active_connections = (int)ctx->max_active_connections;
+ int total_connections = (int)ctx->total_connections;
+ if (active_connections > max_active_connections) {
+ max_active_connections = active_connections;
+ }
+ if (active_connections > total_connections) {
+ total_connections = active_connections;
+ }
+
+ /* Connections information */
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"connections\" : {%s"
+ "\"active\" : %i,%s"
+ "\"maxActive\" : %i,%s"
+ "\"total\" : %i%s"
+ "}",
+ eol,
+ eol,
+ active_connections,
+ eol,
+ max_active_connections,
+ eol,
+ total_connections,
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+
+ /* Queue information */
+#if !defined(ALTERNATIVE_QUEUE)
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"queue\" : {%s"
+ "\"length\" : %i,%s"
+ "\"filled\" : %i,%s"
+ "\"maxFilled\" : %i,%s"
+ "\"full\" : %s%s"
+ "}",
+ eol,
+ eol,
+ ctx->sq_size,
+ eol,
+ ctx->sq_head - ctx->sq_tail,
+ eol,
+ ctx->sq_max_fill,
+ eol,
+ (ctx->sq_blocked ? "true" : "false"),
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+#endif
+
+ /* Requests information */
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"requests\" : {%s"
+ "\"total\" : %lu%s"
+ "}",
+ eol,
+ eol,
+ (unsigned long)ctx->total_requests,
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+
+ /* Data information */
+ total_data_read =
+ mg_atomic_add64((volatile int64_t *)&ctx->total_data_read, 0);
+ total_data_written =
+ mg_atomic_add64((volatile int64_t *)&ctx->total_data_written, 0);
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"data\" : {%s"
+ "\"read\" : %" INT64_FMT ",%s"
+ "\"written\" : %" INT64_FMT "%s"
+ "}",
+ eol,
+ eol,
+ total_data_read,
+ eol,
+ total_data_written,
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+
+ /* Execution time information */
+ gmt_time_string(start_time_str,
+ sizeof(start_time_str) - 1,
+ &start_time);
+ gmt_time_string(now_str, sizeof(now_str) - 1, &now);
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ ",%s\"time\" : {%s"
+ "\"uptime\" : %.0f,%s"
+ "\"start\" : \"%s\",%s"
+ "\"now\" : \"%s\"%s"
+ "}",
+ eol,
+ eol,
+ difftime(now, start_time),
+ eol,
+ start_time_str,
+ eol,
+ now_str,
+ eol);
+ context_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Terminate string */
+ if (append_eoobj) {
+ strcat(append_eoobj, eoobj);
+ }
+ context_info_length += sizeof(eoobj) - 1;
+
+ return (int)context_info_length;
+#else
+ (void)ctx;
+ if ((buffer != NULL) && (buflen > 0)) {
+ *buffer = 0;
+ }
+ return 0;
+#endif
+}
+
+
+CIVETWEB_API void
+mg_disable_connection_keep_alive(struct mg_connection *conn)
+{
+ /* https://github.com/civetweb/civetweb/issues/727 */
+ if (conn != NULL) {
+ conn->must_close = 1;
+ }
+}
+
+
+#if defined(MG_EXPERIMENTAL_INTERFACES)
+/* Get connection information. It can be printed or stored by the caller.
+ * Return the size of available information. */
+CIVETWEB_API int
+mg_get_connection_info(const struct mg_context *ctx,
+ int idx,
+ char *buffer,
+ int buflen)
+{
+ const struct mg_connection *conn;
+ const struct mg_request_info *ri;
+ char *end, *append_eoobj = NULL, block[256];
+ size_t connection_info_length = 0;
+ int state = 0;
+ const char *state_str = "unknown";
+
+#if defined(_WIN32)
+ static const char eol[] = "\r\n", eoobj[] = "\r\n}\r\n";
+#else
+ static const char eol[] = "\n", eoobj[] = "\n}\n";
+#endif
+
+ if ((buffer == NULL) || (buflen < 1)) {
+ buflen = 0;
+ end = buffer;
+ } else {
+ *buffer = 0;
+ end = buffer + buflen;
+ }
+ if (buflen > (int)(sizeof(eoobj) - 1)) {
+ /* has enough space to append eoobj */
+ append_eoobj = buffer;
+ end -= sizeof(eoobj) - 1;
+ }
+
+ if ((ctx == NULL) || (idx < 0)) {
+ /* Parameter error */
+ return 0;
+ }
+
+ if ((unsigned)idx >= ctx->cfg_worker_threads) {
+ /* Out of range */
+ return 0;
+ }
+
+ /* Take connection [idx]. This connection is not locked in
+ * any way, so some other thread might use it. */
+ conn = (ctx->worker_connections) + idx;
+
+ /* Initialize output string */
+ connection_info_length += mg_str_append(&buffer, end, "{");
+
+ /* Init variables */
+ ri = &(conn->request_info);
+
+#if defined(USE_SERVER_STATS)
+ state = conn->conn_state;
+
+ /* State as string */
+ switch (state) {
+ case 0:
+ state_str = "undefined";
+ break;
+ case 1:
+ state_str = "not used";
+ break;
+ case 2:
+ state_str = "init";
+ break;
+ case 3:
+ state_str = "ready";
+ break;
+ case 4:
+ state_str = "processing";
+ break;
+ case 5:
+ state_str = "processed";
+ break;
+ case 6:
+ state_str = "to close";
+ break;
+ case 7:
+ state_str = "closing";
+ break;
+ case 8:
+ state_str = "closed";
+ break;
+ case 9:
+ state_str = "done";
+ break;
+ }
+#endif
+
+ /* Connection info */
+ if ((state >= 3) && (state < 9)) {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s\"connection\" : {%s"
+ "\"remote\" : {%s"
+ "\"protocol\" : \"%s\",%s"
+ "\"addr\" : \"%s\",%s"
+ "\"port\" : %u%s"
+ "},%s"
+ "\"handled_requests\" : %u%s"
+ "}",
+ eol,
+ eol,
+ eol,
+ get_proto_name(conn),
+ eol,
+ ri->remote_addr,
+ eol,
+ ri->remote_port,
+ eol,
+ eol,
+ conn->handled_requests,
+ eol);
+ connection_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Request info */
+ if ((state >= 4) && (state < 6)) {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s%s\"request_info\" : {%s"
+ "\"method\" : \"%s\",%s"
+ "\"uri\" : \"%s\",%s"
+ "\"query\" : %s%s%s%s"
+ "}",
+ (connection_info_length > 1 ? "," : ""),
+ eol,
+ eol,
+ ri->request_method,
+ eol,
+ ri->request_uri,
+ eol,
+ ri->query_string ? "\"" : "",
+ ri->query_string ? ri->query_string : "null",
+ ri->query_string ? "\"" : "",
+ eol);
+ connection_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Execution time information */
+ if ((state >= 2) && (state < 9)) {
+ char start_time_str[64] = {0};
+ char close_time_str[64] = {0};
+ time_t start_time = conn->conn_birth_time;
+ time_t close_time = 0;
+ double time_diff;
+
+ gmt_time_string(start_time_str,
+ sizeof(start_time_str) - 1,
+ &start_time);
+#if defined(USE_SERVER_STATS)
+ close_time = conn->conn_close_time;
+#endif
+ if (close_time != 0) {
+ time_diff = difftime(close_time, start_time);
+ gmt_time_string(close_time_str,
+ sizeof(close_time_str) - 1,
+ &close_time);
+ } else {
+ time_t now = time(NULL);
+ time_diff = difftime(now, start_time);
+ close_time_str[0] = 0; /* or use "now" ? */
+ }
+
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s%s\"time\" : {%s"
+ "\"uptime\" : %.0f,%s"
+ "\"start\" : \"%s\",%s"
+ "\"closed\" : \"%s\"%s"
+ "}",
+ (connection_info_length > 1 ? "," : ""),
+ eol,
+ eol,
+ time_diff,
+ eol,
+ start_time_str,
+ eol,
+ close_time_str,
+ eol);
+ connection_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Remote user name */
+ if ((ri->remote_user) && (state < 9)) {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s%s\"user\" : {%s"
+ "\"name\" : \"%s\",%s"
+ "}",
+ (connection_info_length > 1 ? "," : ""),
+ eol,
+ eol,
+ ri->remote_user,
+ eol);
+ connection_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* Data block */
+ if (state >= 3) {
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s%s\"data\" : {%s"
+ "\"read\" : %" INT64_FMT ",%s"
+ "\"written\" : %" INT64_FMT "%s"
+ "}",
+ (connection_info_length > 1 ? "," : ""),
+ eol,
+ eol,
+ conn->consumed_content,
+ eol,
+ conn->num_bytes_sent,
+ eol);
+ connection_info_length += mg_str_append(&buffer, end, block);
+ }
+
+ /* State */
+ mg_snprintf(NULL,
+ NULL,
+ block,
+ sizeof(block),
+ "%s%s\"state\" : \"%s\"",
+ (connection_info_length > 1 ? "," : ""),
+ eol,
+ state_str);
+ connection_info_length += mg_str_append(&buffer, end, block);
+
+ /* Terminate string */
+ if (append_eoobj) {
+ strcat(append_eoobj, eoobj);
+ }
+ connection_info_length += sizeof(eoobj) - 1;
+
+ return (int)connection_info_length;
+}
+
+#if 0
+/* Get handler information. It can be printed or stored by the caller.
+ * Return the size of available information. */
+CIVETWEB_API int
+mg_get_handler_info(struct mg_context *ctx,
+ char *buffer,
+ int buflen)
+{
+ int handler_info_len = 0;
+ struct mg_handler_info *tmp_rh;
+ mg_lock_context(ctx);
+
+ for (tmp_rh = ctx->dd.handlers; tmp_rh != NULL; tmp_rh = tmp_rh->next) {
+
+ if (buflen > handler_info_len+ tmp_rh->uri_len) {
+ memcpy(buffer+handler_info_len, tmp_rh->uri, tmp_rh->uri_len);
+ }
+ handler_info_len += tmp_rh->uri_len;
+
+ switch (tmp_rh->handler_type) {
+ case REQUEST_HANDLER:
+ (void)tmp_rh->handler;
+ break;
+ case WEBSOCKET_HANDLER:
+ (void)tmp_rh->connect_handler;
+ (void) tmp_rh->ready_handler;
+ (void) tmp_rh->data_handler;
+ (void) tmp_rh->close_handler;
+ break;
+ case AUTH_HANDLER:
+ (void) tmp_rh->auth_handler;
+ break;
+ }
+ (void)cbdata;
+ }
+
+ mg_unlock_context(ctx);
+ return handler_info_len;
+}
+#endif
+#endif
+
+
+/* Initialize this library. This function does not need to be thread safe.
+ */
+CIVETWEB_API unsigned
+mg_init_library(unsigned features)
+{
+ unsigned features_to_init = mg_check_feature(features & 0xFFu);
+ unsigned features_inited = features_to_init;
+
+ if (mg_init_library_called <= 0) {
+ /* Not initialized yet */
+ if (0 != pthread_mutex_init(&global_lock_mutex, NULL)) {
+ return 0;
+ }
+ }
+
+ mg_global_lock();
+
+ if (mg_init_library_called <= 0) {
+ int i;
+ size_t len;
+
+#if defined(_WIN32)
+ int file_mutex_init = 1;
+ int wsa = 1;
+#else
+ int mutexattr_init = 1;
+#endif
+ int failed = 1;
+ int key_create = pthread_key_create(&sTlsKey, tls_dtor);
+
+ if (key_create == 0) {
+#if defined(_WIN32)
+ file_mutex_init =
+ pthread_mutex_init(&global_log_file_lock, &pthread_mutex_attr);
+ if (file_mutex_init == 0) {
+ /* Start WinSock */
+ WSADATA data;
+ failed = wsa = WSAStartup(MAKEWORD(2, 2), &data);
+ }
+#else
+ mutexattr_init = pthread_mutexattr_init(&pthread_mutex_attr);
+ if (mutexattr_init == 0) {
+ failed = pthread_mutexattr_settype(&pthread_mutex_attr,
+ PTHREAD_MUTEX_RECURSIVE);
+ }
+#endif
+ }
+
+ if (failed) {
+#if defined(_WIN32)
+ if (wsa == 0) {
+ (void)WSACleanup();
+ }
+ if (file_mutex_init == 0) {
+ (void)pthread_mutex_destroy(&global_log_file_lock);
+ }
+#else
+ if (mutexattr_init == 0) {
+ (void)pthread_mutexattr_destroy(&pthread_mutex_attr);
+ }
+#endif
+ if (key_create == 0) {
+ (void)pthread_key_delete(sTlsKey);
+ }
+ mg_global_unlock();
+ (void)pthread_mutex_destroy(&global_lock_mutex);
+ return 0;
+ }
+
+ len = 1;
+ for (i = 0; http_methods[i].name != NULL; i++) {
+ size_t sl = strlen(http_methods[i].name);
+ len += sl;
+ if (i > 0) {
+ len += 2;
+ }
+ }
+ all_methods = (char *)mg_malloc(len);
+ if (!all_methods) {
+ /* Must never happen */
+ mg_global_unlock();
+ (void)pthread_mutex_destroy(&global_lock_mutex);
+ return 0;
+ }
+ all_methods[0] = 0;
+ for (i = 0; http_methods[i].name != NULL; i++) {
+ if (i > 0) {
+ strcat(all_methods, ", ");
+ strcat(all_methods, http_methods[i].name);
+ } else {
+ strcpy(all_methods, http_methods[i].name);
+ }
+ }
+ }
+
+#if defined(USE_LUA)
+ lua_init_optional_libraries();
+#endif
+
+#if (defined(OPENSSL_API_1_0) || defined(OPENSSL_API_1_1) \
+ || defined(OPENSSL_API_3_0)) \
+ && !defined(NO_SSL)
+
+ if (features_to_init & MG_FEATURES_SSL) {
+ if (!mg_openssl_initialized) {
+ char ebuf[128];
+ if (initialize_openssl(ebuf, sizeof(ebuf))) {
+ mg_openssl_initialized = 1;
+ } else {
+ (void)ebuf;
+ DEBUG_TRACE("Initializing SSL failed: %s", ebuf);
+ features_inited &= ~((unsigned)(MG_FEATURES_SSL));
+ }
+ } else {
+ /* ssl already initialized */
+ }
+ }
+
+#endif
+
+ if (mg_init_library_called <= 0) {
+ mg_init_library_called = 1;
+ } else {
+ mg_init_library_called++;
+ }
+ mg_global_unlock();
+
+ return features_inited;
+}
+
+
+/* Un-initialize this library. */
+CIVETWEB_API unsigned
+mg_exit_library(void)
+{
+ if (mg_init_library_called <= 0) {
+ return 0;
+ }
+
+ mg_global_lock();
+
+ mg_init_library_called--;
+ if (mg_init_library_called == 0) {
+#if (defined(OPENSSL_API_1_0) || defined(OPENSSL_API_1_1)) && !defined(NO_SSL)
+ if (mg_openssl_initialized) {
+ uninitialize_openssl();
+ mg_openssl_initialized = 0;
+ }
+#endif
+
+#if defined(_WIN32)
+ (void)WSACleanup();
+ (void)pthread_mutex_destroy(&global_log_file_lock);
+#else
+ (void)pthread_mutexattr_destroy(&pthread_mutex_attr);
+#endif
+
+ (void)pthread_key_delete(sTlsKey);
+
+#if defined(USE_LUA)
+ lua_exit_optional_libraries();
+#endif
+ mg_free(all_methods);
+ all_methods = NULL;
+
+ mg_global_unlock();
+ (void)pthread_mutex_destroy(&global_lock_mutex);
+ return 1;
+ }
+
+ mg_global_unlock();
+ return 1;
+}
+
+
+/* End of civetweb.c */
diff -Nurp civetweb-1.16-orig/.pc/civetweb-1.16-CVE-2025-9648.patch/src/handle_form.inl civetweb-1.16/.pc/civetweb-1.16-CVE-2025-9648.patch/src/handle_form.inl
--- civetweb-1.16-orig/.pc/civetweb-1.16-CVE-2025-9648.patch/src/handle_form.inl 1970-01-01 01:00:00.000000000 +0100
+++ civetweb-1.16/.pc/civetweb-1.16-CVE-2025-9648.patch/src/handle_form.inl 2023-04-08 17:38:36.000000000 +0200
@@ -0,0 +1,1082 @@
+/* Copyright (c) 2016-2021 the Civetweb developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+static int
+url_encoded_field_found(const struct mg_connection *conn,
+ const char *key,
+ size_t key_len,
+ const char *filename,
+ size_t filename_len,
+ char *path,
+ size_t path_len,
+ struct mg_form_data_handler *fdh)
+{
+ char key_dec[1024];
+ char filename_dec[1024];
+ int key_dec_len;
+ int filename_dec_len;
+ int ret;
+
+ key_dec_len =
+ mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+
+ if (((size_t)key_dec_len >= (size_t)sizeof(key_dec)) || (key_dec_len < 0)) {
+ return MG_FORM_FIELD_STORAGE_SKIP;
+ }
+
+ if (filename) {
+ filename_dec_len = mg_url_decode(filename,
+ (int)filename_len,
+ filename_dec,
+ (int)sizeof(filename_dec),
+ 1);
+
+ if (((size_t)filename_dec_len >= (size_t)sizeof(filename_dec))
+ || (filename_dec_len < 0)) {
+ /* Log error message and skip this field. */
+ mg_cry_internal(conn, "%s: Cannot decode filename", __func__);
+ return MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ remove_dot_segments(filename_dec);
+
+ } else {
+ filename_dec[0] = 0;
+ }
+
+ ret =
+ fdh->field_found(key_dec, filename_dec, path, path_len, fdh->user_data);
+
+ if ((ret & 0xF) == MG_FORM_FIELD_STORAGE_GET) {
+ if (fdh->field_get == NULL) {
+ mg_cry_internal(conn,
+ "%s: Function \"Get\" not available",
+ __func__);
+ return MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+ if ((ret & 0xF) == MG_FORM_FIELD_STORAGE_STORE) {
+ if (fdh->field_store == NULL) {
+ mg_cry_internal(conn,
+ "%s: Function \"Store\" not available",
+ __func__);
+ return MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+
+ return ret;
+}
+
+static int
+url_encoded_field_get(
+ const struct mg_connection *conn,
+ const char *key,
+ size_t key_len,
+ const char *value,
+ size_t *value_len, /* IN: number of bytes available in "value", OUT: number
+ of bytes processed */
+ struct mg_form_data_handler *fdh)
+{
+ char key_dec[1024];
+
+ char *value_dec = (char *)mg_malloc_ctx(*value_len + 1, conn->phys_ctx);
+ int value_dec_len, ret;
+
+ if (!value_dec) {
+ /* Log error message and stop parsing the form data. */
+ mg_cry_internal(conn,
+ "%s: Not enough memory (required: %lu)",
+ __func__,
+ (unsigned long)(*value_len + 1));
+ return MG_FORM_FIELD_STORAGE_ABORT;
+ }
+
+ mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+
+ if (*value_len >= 2 && value[*value_len - 2] == '%')
+ *value_len -= 2;
+ else if (*value_len >= 1 && value[*value_len - 1] == '%')
+ (*value_len)--;
+ value_dec_len = mg_url_decode(
+ value, (int)*value_len, value_dec, ((int)*value_len) + 1, 1);
+
+ ret = fdh->field_get(key_dec,
+ value_dec,
+ (size_t)value_dec_len,
+ fdh->user_data);
+
+ mg_free(value_dec);
+
+ return ret;
+}
+
+static int
+unencoded_field_get(const struct mg_connection *conn,
+ const char *key,
+ size_t key_len,
+ const char *value,
+ size_t value_len,
+ struct mg_form_data_handler *fdh)
+{
+ char key_dec[1024];
+ (void)conn;
+
+ mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+
+ return fdh->field_get(key_dec, value, value_len, fdh->user_data);
+}
+
+static int
+field_stored(const struct mg_connection *conn,
+ const char *path,
+ long long file_size,
+ struct mg_form_data_handler *fdh)
+{
+ /* Equivalent to "upload" callback of "mg_upload". */
+
+ (void)conn; /* we do not need mg_cry here, so conn is currently unused */
+
+ return fdh->field_store(path, file_size, fdh->user_data);
+}
+
+static const char *
+search_boundary(const char *buf,
+ size_t buf_len,
+ const char *boundary,
+ size_t boundary_len)
+{
+ /* We must do a binary search here, not a string search, since the buffer
+ * may contain '\x00' bytes, if binary data is transferred. */
+ int clen = (int)buf_len - (int)boundary_len - 4;
+ int i;
+
+ for (i = 0; i <= clen; i++) {
+ if (!memcmp(buf + i, "\r\n--", 4)) {
+ if (!memcmp(buf + i + 4, boundary, boundary_len)) {
+ return buf + i;
+ }
+ }
+ }
+ return NULL;
+}
+
+int
+mg_handle_form_request(struct mg_connection *conn,
+ struct mg_form_data_handler *fdh)
+{
+ const char *content_type;
+ char path[512];
+ char buf[MG_BUF_LEN]; /* Must not be smaller than ~900 */
+ int field_storage;
+ int buf_fill = 0;
+ int r;
+ int field_count = 0;
+ struct mg_file fstore = STRUCT_FILE_INITIALIZER;
+ int64_t file_size = 0; /* init here, to a avoid a false positive
+ "uninitialized variable used" warning */
+
+ int has_body_data =
+ (conn->request_info.content_length > 0) || (conn->is_chunked);
+
+ /* Unused without filesystems */
+ (void)fstore;
+ (void)file_size;
+
+ /* There are three ways to encode data from a HTML form:
+ * 1) method: GET (default)
+ * The form data is in the HTTP query string.
+ * 2) method: POST, enctype: "application/x-www-form-urlencoded"
+ * The form data is in the request body.
+ * The body is url encoded (the default encoding for POST).
+ * 3) method: POST, enctype: "multipart/form-data".
+ * The form data is in the request body of a multipart message.
+ * This is the typical way to handle file upload from a form.
+ */
+
+ if (!has_body_data) {
+ const char *data;
+
+ if (0 != strcmp(conn->request_info.request_method, "GET")) {
+ /* No body data, but not a GET request.
+ * This is not a valid form request. */
+ return -1;
+ }
+
+ /* GET request: form data is in the query string. */
+ /* The entire data has already been loaded, so there is no need to
+ * call mg_read. We just need to split the query string into key-value
+ * pairs. */
+ data = conn->request_info.query_string;
+ if (!data) {
+ /* No query string. */
+ return -1;
+ }
+
+ /* Split data in a=1&b=xy&c=3&c=4 ... */
+ while (*data) {
+ const char *val = strchr(data, '=');
+ const char *next;
+ ptrdiff_t keylen, vallen;
+
+ if (!val) {
+ break;
+ }
+ keylen = val - data;
+
+ /* In every "field_found" callback we ask what to do with the
+ * data ("field_storage"). This could be:
+ * MG_FORM_FIELD_STORAGE_SKIP (0):
+ * ignore the value of this field
+ * MG_FORM_FIELD_STORAGE_GET (1):
+ * read the data and call the get callback function
+ * MG_FORM_FIELD_STORAGE_STORE (2):
+ * store the data in a file
+ * MG_FORM_FIELD_STORAGE_READ (3):
+ * let the user read the data (for parsing long data on the fly)
+ * MG_FORM_FIELD_STORAGE_ABORT (flag):
+ * stop parsing
+ */
+ memset(path, 0, sizeof(path));
+ field_count++;
+ field_storage = url_encoded_field_found(conn,
+ data,
+ (size_t)keylen,
+ NULL,
+ 0,
+ path,
+ sizeof(path) - 1,
+ fdh);
+
+ val++;
+ next = strchr(val, '&');
+ if (next) {
+ vallen = next - val;
+ } else {
+ vallen = (ptrdiff_t)strlen(val);
+ }
+
+ if (field_storage == MG_FORM_FIELD_STORAGE_GET) {
+ /* Call callback */
+ r = url_encoded_field_get(
+ conn, data, (size_t)keylen, val, (size_t *)&vallen, fdh);
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ if (r == MG_FORM_FIELD_HANDLE_NEXT) {
+ /* Skip to next field */
+ field_storage = MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+
+ if (next) {
+ next++;
+ } else {
+ /* vallen may have been modified by url_encoded_field_get */
+ next = val + vallen;
+ }
+
+#if !defined(NO_FILESYSTEMS)
+ if (field_storage == MG_FORM_FIELD_STORAGE_STORE) {
+ /* Store the content to a file */
+ if (mg_fopen(conn, path, MG_FOPEN_MODE_WRITE, &fstore) == 0) {
+ fstore.access.fp = NULL;
+ }
+ file_size = 0;
+ if (fstore.access.fp != NULL) {
+ size_t n = (size_t)
+ fwrite(val, 1, (size_t)vallen, fstore.access.fp);
+ if ((n != (size_t)vallen) || (ferror(fstore.access.fp))) {
+ mg_cry_internal(conn,
+ "%s: Cannot write file %s",
+ __func__,
+ path);
+ (void)mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ }
+ file_size += (int64_t)n;
+
+ if (fstore.access.fp) {
+ r = mg_fclose(&fstore.access);
+ if (r == 0) {
+ /* stored successfully */
+ r = field_stored(conn, path, file_size, fdh);
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+
+ } else {
+ mg_cry_internal(conn,
+ "%s: Error saving file %s",
+ __func__,
+ path);
+ remove_bad_file(conn, path);
+ }
+ fstore.access.fp = NULL;
+ }
+
+ } else {
+ mg_cry_internal(conn,
+ "%s: Cannot create file %s",
+ __func__,
+ path);
+ }
+ }
+#endif /* NO_FILESYSTEMS */
+
+ /* if (field_storage == MG_FORM_FIELD_STORAGE_READ) { */
+ /* The idea of "field_storage=read" is to let the API user read
+ * data chunk by chunk and to some data processing on the fly.
+ * This should avoid the need to store data in the server:
+ * It should neither be stored in memory, like
+ * "field_storage=get" does, nor in a file like
+ * "field_storage=store".
+ * However, for a "GET" request this does not make any much
+ * sense, since the data is already stored in memory, as it is
+ * part of the query string.
+ */
+ /* } */
+
+ if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
+ == MG_FORM_FIELD_STORAGE_ABORT) {
+ /* Stop parsing the request */
+ break;
+ }
+
+ /* Proceed to next entry */
+ data = next;
+ }
+
+ return field_count;
+ }
+
+ content_type = mg_get_header(conn, "Content-Type");
+
+ if (!content_type
+ || !mg_strncasecmp(content_type,
+ "APPLICATION/X-WWW-FORM-URLENCODED",
+ 33)
+ || !mg_strncasecmp(content_type,
+ "APPLICATION/WWW-FORM-URLENCODED",
+ 31)) {
+ /* The form data is in the request body data, encoded in key/value
+ * pairs. */
+ int all_data_read = 0;
+
+ /* Read body data and split it in keys and values.
+ * The encoding is like in the "GET" case above: a=1&b&c=3&c=4.
+ * Here we use "POST", and read the data from the request body.
+ * The data read on the fly, so it is not required to buffer the
+ * entire request in memory before processing it. */
+ for (;;) {
+ const char *val;
+ const char *next;
+ ptrdiff_t keylen, vallen;
+ ptrdiff_t used;
+ int end_of_key_value_pair_found = 0;
+ int get_block;
+
+ if ((size_t)buf_fill < (sizeof(buf) - 1)) {
+
+ size_t to_read = sizeof(buf) - 1 - (size_t)buf_fill;
+ r = mg_read(conn, buf + (size_t)buf_fill, to_read);
+ if ((r < 0) || ((r == 0) && all_data_read)) {
+ /* read error */
+ return -1;
+ }
+ if (r == 0) {
+ /* TODO: Create a function to get "all_data_read" from
+ * the conn object. All data is read if the Content-Length
+ * has been reached, or if chunked encoding is used and
+ * the end marker has been read, or if the connection has
+ * been closed. */
+ all_data_read = (buf_fill == 0);
+ }
+ buf_fill += r;
+ buf[buf_fill] = 0;
+ if (buf_fill < 1) {
+ break;
+ }
+ }
+
+ val = strchr(buf, '=');
+
+ if (!val) {
+ break;
+ }
+ keylen = val - buf;
+ val++;
+
+ /* Call callback */
+ memset(path, 0, sizeof(path));
+ field_count++;
+ field_storage = url_encoded_field_found(conn,
+ buf,
+ (size_t)keylen,
+ NULL,
+ 0,
+ path,
+ sizeof(path) - 1,
+ fdh);
+
+ if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
+ == MG_FORM_FIELD_STORAGE_ABORT) {
+ /* Stop parsing the request */
+ break;
+ }
+
+#if !defined(NO_FILESYSTEMS)
+ if (field_storage == MG_FORM_FIELD_STORAGE_STORE) {
+ if (mg_fopen(conn, path, MG_FOPEN_MODE_WRITE, &fstore) == 0) {
+ fstore.access.fp = NULL;
+ }
+ file_size = 0;
+ if (!fstore.access.fp) {
+ mg_cry_internal(conn,
+ "%s: Cannot create file %s",
+ __func__,
+ path);
+ }
+ }
+#endif /* NO_FILESYSTEMS */
+
+ get_block = 0;
+ /* Loop to read values larger than sizeof(buf)-keylen-2 */
+ do {
+ next = strchr(val, '&');
+ if (next) {
+ vallen = next - val;
+ end_of_key_value_pair_found = 1;
+ } else {
+ vallen = (ptrdiff_t)strlen(val);
+ end_of_key_value_pair_found = all_data_read;
+ }
+
+ if (field_storage == MG_FORM_FIELD_STORAGE_GET) {
+#if 0
+ if (!end_of_key_value_pair_found && !all_data_read) {
+ /* This callback will deliver partial contents */
+ }
+#endif
+
+ /* Call callback */
+ r = url_encoded_field_get(conn,
+ ((get_block > 0) ? NULL : buf),
+ ((get_block > 0)
+ ? 0
+ : (size_t)keylen),
+ val,
+ (size_t *)&vallen,
+ fdh);
+ get_block++;
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ if (r == MG_FORM_FIELD_HANDLE_NEXT) {
+ /* Skip to next field */
+ field_storage = MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+
+ if (next) {
+ next++;
+ } else {
+ /* vallen may have been modified by url_encoded_field_get */
+ next = val + vallen;
+ }
+
+#if !defined(NO_FILESYSTEMS)
+ if (fstore.access.fp) {
+ size_t n = (size_t)
+ fwrite(val, 1, (size_t)vallen, fstore.access.fp);
+ if ((n != (size_t)vallen) || (ferror(fstore.access.fp))) {
+ mg_cry_internal(conn,
+ "%s: Cannot write file %s",
+ __func__,
+ path);
+ mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ }
+ file_size += (int64_t)n;
+ }
+#endif /* NO_FILESYSTEMS */
+
+ if (!end_of_key_value_pair_found) {
+ used = next - buf;
+ memmove(buf,
+ buf + (size_t)used,
+ sizeof(buf) - (size_t)used);
+ next = buf;
+ buf_fill -= (int)used;
+ if ((size_t)buf_fill < (sizeof(buf) - 1)) {
+
+ size_t to_read = sizeof(buf) - 1 - (size_t)buf_fill;
+ r = mg_read(conn, buf + (size_t)buf_fill, to_read);
+ if ((r < 0) || ((r == 0) && all_data_read)) {
+#if !defined(NO_FILESYSTEMS)
+ /* read error */
+ if (fstore.access.fp) {
+ mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ }
+ return -1;
+#endif /* NO_FILESYSTEMS */
+ }
+ if (r == 0) {
+ /* TODO: Create a function to get "all_data_read"
+ * from the conn object. All data is read if the
+ * Content-Length has been reached, or if chunked
+ * encoding is used and the end marker has been
+ * read, or if the connection has been closed. */
+ all_data_read = (buf_fill == 0);
+ }
+ buf_fill += r;
+ buf[buf_fill] = 0;
+ if (buf_fill < 1) {
+ break;
+ }
+ val = buf;
+ }
+ }
+
+ } while (!end_of_key_value_pair_found);
+
+#if !defined(NO_FILESYSTEMS)
+ if (fstore.access.fp) {
+ r = mg_fclose(&fstore.access);
+ if (r == 0) {
+ /* stored successfully */
+ r = field_stored(conn, path, file_size, fdh);
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ } else {
+ mg_cry_internal(conn,
+ "%s: Error saving file %s",
+ __func__,
+ path);
+ remove_bad_file(conn, path);
+ }
+ fstore.access.fp = NULL;
+ }
+#endif /* NO_FILESYSTEMS */
+
+ if (all_data_read && (buf_fill == 0)) {
+ /* nothing more to process */
+ break;
+ }
+
+ /* Proceed to next entry */
+ used = next - buf;
+ memmove(buf, buf + (size_t)used, sizeof(buf) - (size_t)used);
+ buf_fill -= (int)used;
+ }
+
+ return field_count;
+ }
+
+ if (!mg_strncasecmp(content_type, "MULTIPART/FORM-DATA;", 20)) {
+ /* The form data is in the request body data, encoded as multipart
+ * content (see https://www.ietf.org/rfc/rfc1867.txt,
+ * https://www.ietf.org/rfc/rfc2388.txt). */
+ char *boundary;
+ size_t bl;
+ ptrdiff_t used;
+ struct mg_request_info part_header;
+ char *hbuf;
+ const char *content_disp, *hend, *fbeg, *fend, *nbeg, *nend;
+ const char *next;
+ unsigned part_no;
+ int all_data_read = 0;
+
+ memset(&part_header, 0, sizeof(part_header));
+
+ /* Skip all spaces between MULTIPART/FORM-DATA; and BOUNDARY= */
+ bl = 20;
+ while (content_type[bl] == ' ') {
+ bl++;
+ }
+
+ /* There has to be a BOUNDARY definition in the Content-Type header */
+ if (mg_strncasecmp(content_type + bl, "BOUNDARY=", 9)) {
+ /* Malformed request */
+ return -1;
+ }
+
+ /* Copy boundary string to variable "boundary" */
+ fbeg = content_type + bl + 9;
+ bl = strlen(fbeg);
+ boundary = (char *)mg_malloc(bl + 1);
+ if (!boundary) {
+ /* Out of memory */
+ mg_cry_internal(conn,
+ "%s: Cannot allocate memory for boundary [%lu]",
+ __func__,
+ (unsigned long)bl);
+ return -1;
+ }
+ memcpy(boundary, fbeg, bl);
+ boundary[bl] = 0;
+
+ /* RFC 2046 permits the boundary string to be quoted. */
+ /* If the boundary is quoted, trim the quotes */
+ if (boundary[0] == '"') {
+ hbuf = strchr(boundary + 1, '"');
+ if ((!hbuf) || (*hbuf != '"')) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ *hbuf = 0;
+ memmove(boundary, boundary + 1, bl);
+ bl = strlen(boundary);
+ }
+
+ /* Do some sanity checks for boundary lengths */
+ if (bl > 70) {
+ /* From RFC 2046:
+ * Boundary delimiters must not appear within the
+ * encapsulated material, and must be no longer
+ * than 70 characters, not counting the two
+ * leading hyphens.
+ */
+
+ /* The algorithm can not work if bl >= sizeof(buf), or if buf
+ * can not hold the multipart header plus the boundary.
+ * Requests with long boundaries are not RFC compliant, maybe they
+ * are intended attacks to interfere with this algorithm. */
+ mg_free(boundary);
+ return -1;
+ }
+ if (bl < 4) {
+ /* Sanity check: A boundary string of less than 4 bytes makes
+ * no sense either. */
+ mg_free(boundary);
+ return -1;
+ }
+
+ for (part_no = 0;; part_no++) {
+ size_t towrite, fnlen, n;
+ int get_block;
+ size_t to_read = sizeof(buf) - 1 - (size_t)buf_fill;
+
+ /* Unused without filesystems */
+ (void)n;
+
+ r = mg_read(conn, buf + (size_t)buf_fill, to_read);
+ if ((r < 0) || ((r == 0) && all_data_read)) {
+ /* read error */
+ mg_free(boundary);
+ return -1;
+ }
+ if (r == 0) {
+ all_data_read = (buf_fill == 0);
+ }
+
+ buf_fill += r;
+ buf[buf_fill] = 0;
+ if (buf_fill < 1) {
+ /* No data */
+ mg_free(boundary);
+ return -1;
+ }
+
+ if (part_no == 0) {
+ int d = 0;
+ while ((d < buf_fill) && (buf[d] != '-')) {
+ d++;
+ }
+ if ((d > 0) && (buf[d] == '-')) {
+ memmove(buf, buf + d, (unsigned)buf_fill - (unsigned)d);
+ buf_fill -= d;
+ buf[buf_fill] = 0;
+ }
+ }
+
+ if (buf[0] != '-' || buf[1] != '-') {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ if (0 != strncmp(buf + 2, boundary, bl)) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ if (buf[bl + 2] != '\r' || buf[bl + 3] != '\n') {
+ /* Every part must end with \r\n, if there is another part.
+ * The end of the request has an extra -- */
+ if (((size_t)buf_fill != (size_t)(bl + 6))
+ || (strncmp(buf + bl + 2, "--\r\n", 4))) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ /* End of the request */
+ break;
+ }
+
+ /* Next, we need to get the part header: Read until \r\n\r\n */
+ hbuf = buf + bl + 4;
+ hend = strstr(hbuf, "\r\n\r\n");
+ if (!hend) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+
+ part_header.num_headers =
+ parse_http_headers(&hbuf, part_header.http_headers);
+ if ((hend + 2) != hbuf) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+
+ /* Skip \r\n\r\n */
+ hend += 4;
+
+ /* According to the RFC, every part has to have a header field like:
+ * Content-Disposition: form-data; name="..." */
+ content_disp = get_header(part_header.http_headers,
+ part_header.num_headers,
+ "Content-Disposition");
+ if (!content_disp) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+
+ /* Get the mandatory name="..." part of the Content-Disposition
+ * header. */
+ nbeg = strstr(content_disp, "name=\"");
+ while ((nbeg != NULL) && (strcspn(nbeg - 1, ":,; \t") != 0)) {
+ /* It could be somethingname= instead of name= */
+ nbeg = strstr(nbeg + 1, "name=\"");
+ }
+
+ /* This line is not required, but otherwise some compilers
+ * generate spurious warnings. */
+ nend = nbeg;
+ /* And others complain, the result is unused. */
+ (void)nend;
+
+ /* If name=" is found, search for the closing " */
+ if (nbeg) {
+ nbeg += 6;
+ nend = strchr(nbeg, '\"');
+ if (!nend) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ } else {
+ /* name= without quotes is also allowed */
+ nbeg = strstr(content_disp, "name=");
+ while ((nbeg != NULL) && (strcspn(nbeg - 1, ":,; \t") != 0)) {
+ /* It could be somethingname= instead of name= */
+ nbeg = strstr(nbeg + 1, "name=");
+ }
+ if (!nbeg) {
+ /* Malformed request */
+ mg_free(boundary);
+ return -1;
+ }
+ nbeg += 5;
+
+ /* RFC 2616 Sec. 2.2 defines a list of allowed
+ * separators, but many of them make no sense
+ * here, e.g. various brackets or slashes.
+ * If they are used, probably someone is
+ * trying to attack with curious hand made
+ * requests. Only ; , space and tab seem to be
+ * reasonable here. Ignore everything else. */
+ nend = nbeg + strcspn(nbeg, ",; \t");
+ }
+
+ /* Get the optional filename="..." part of the Content-Disposition
+ * header. */
+ fbeg = strstr(content_disp, "filename=\"");
+ while ((fbeg != NULL) && (strcspn(fbeg - 1, ":,; \t") != 0)) {
+ /* It could be somethingfilename= instead of filename= */
+ fbeg = strstr(fbeg + 1, "filename=\"");
+ }
+
+ /* This line is not required, but otherwise some compilers
+ * generate spurious warnings. */
+ fend = fbeg;
+
+ /* If filename=" is found, search for the closing " */
+ if (fbeg) {
+ fbeg += 10;
+ fend = strchr(fbeg, '\"');
+
+ if (!fend) {
+ /* Malformed request (the filename field is optional, but if
+ * it exists, it needs to be terminated correctly). */
+ mg_free(boundary);
+ return -1;
+ }
+
+ /* TODO: check Content-Type */
+ /* Content-Type: application/octet-stream */
+ }
+ if (!fbeg) {
+ /* Try the same without quotes */
+ fbeg = strstr(content_disp, "filename=");
+ while ((fbeg != NULL) && (strcspn(fbeg - 1, ":,; \t") != 0)) {
+ /* It could be somethingfilename= instead of filename= */
+ fbeg = strstr(fbeg + 1, "filename=");
+ }
+ if (fbeg) {
+ fbeg += 9;
+ fend = fbeg + strcspn(fbeg, ",; \t");
+ }
+ }
+
+ if (!fbeg || !fend) {
+ fbeg = NULL;
+ fend = NULL;
+ fnlen = 0;
+ } else {
+ fnlen = (size_t)(fend - fbeg);
+ }
+
+ /* In theory, it could be possible that someone crafts
+ * a request like name=filename=xyz. Check if name and
+ * filename do not overlap. */
+ if (!(((ptrdiff_t)fbeg > (ptrdiff_t)nend)
+ || ((ptrdiff_t)nbeg > (ptrdiff_t)fend))) {
+ mg_free(boundary);
+ return -1;
+ }
+
+ /* Call callback for new field */
+ memset(path, 0, sizeof(path));
+ field_count++;
+ field_storage = url_encoded_field_found(conn,
+ nbeg,
+ (size_t)(nend - nbeg),
+ ((fnlen > 0) ? fbeg : NULL),
+ fnlen,
+ path,
+ sizeof(path) - 1,
+ fdh);
+
+ /* If the boundary is already in the buffer, get the address,
+ * otherwise next will be NULL. */
+ next = search_boundary(hbuf,
+ (size_t)((buf - hbuf) + buf_fill),
+ boundary,
+ bl);
+
+#if !defined(NO_FILESYSTEMS)
+ if (field_storage == MG_FORM_FIELD_STORAGE_STORE) {
+ /* Store the content to a file */
+ if (mg_fopen(conn, path, MG_FOPEN_MODE_WRITE, &fstore) == 0) {
+ fstore.access.fp = NULL;
+ }
+ file_size = 0;
+
+ if (!fstore.access.fp) {
+ mg_cry_internal(conn,
+ "%s: Cannot create file %s",
+ __func__,
+ path);
+ }
+ }
+#endif /* NO_FILESYSTEMS */
+
+ get_block = 0;
+ while (!next) {
+ /* Set "towrite" to the number of bytes available
+ * in the buffer */
+ towrite = (size_t)(buf - hend + buf_fill);
+
+ if (towrite < bl + 4) {
+ /* Not enough data stored. */
+ /* Incomplete request. */
+ mg_free(boundary);
+ return -1;
+ }
+
+ /* Subtract the boundary length, to deal with
+ * cases the boundary is only partially stored
+ * in the buffer. */
+ towrite -= bl + 4;
+
+ if (field_storage == MG_FORM_FIELD_STORAGE_GET) {
+ r = unencoded_field_get(conn,
+ ((get_block > 0) ? NULL : nbeg),
+ ((get_block > 0)
+ ? 0
+ : (size_t)(nend - nbeg)),
+ hend,
+ towrite,
+ fdh);
+ get_block++;
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ if (r == MG_FORM_FIELD_HANDLE_NEXT) {
+ /* Skip to next field */
+ field_storage = MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+
+#if !defined(NO_FILESYSTEMS)
+ if (field_storage == MG_FORM_FIELD_STORAGE_STORE) {
+ if (fstore.access.fp) {
+
+ /* Store the content of the buffer. */
+ n = (size_t)fwrite(hend, 1, towrite, fstore.access.fp);
+ if ((n != towrite) || (ferror(fstore.access.fp))) {
+ mg_cry_internal(conn,
+ "%s: Cannot write file %s",
+ __func__,
+ path);
+ mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ }
+ file_size += (int64_t)n;
+ }
+ }
+#endif /* NO_FILESYSTEMS */
+
+ memmove(buf, hend + towrite, bl + 4);
+ buf_fill = (int)(bl + 4);
+ hend = buf;
+
+ /* Read new data */
+ to_read = sizeof(buf) - 1 - (size_t)buf_fill;
+ r = mg_read(conn, buf + (size_t)buf_fill, to_read);
+ if ((r < 0) || ((r == 0) && all_data_read)) {
+#if !defined(NO_FILESYSTEMS)
+ /* read error */
+ if (fstore.access.fp) {
+ mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ }
+#endif /* NO_FILESYSTEMS */
+ mg_free(boundary);
+ return -1;
+ }
+ /* r==0 already handled, all_data_read is false here */
+
+ buf_fill += r;
+ buf[buf_fill] = 0;
+ /* buf_fill is at least 8 here */
+
+ /* Find boundary */
+ next = search_boundary(buf, (size_t)buf_fill, boundary, bl);
+
+ if (!next && (r == 0)) {
+ /* incomplete request */
+ all_data_read = 1;
+ }
+ }
+
+ towrite = (next ? (size_t)(next - hend) : 0);
+
+ if (field_storage == MG_FORM_FIELD_STORAGE_GET) {
+ /* Call callback */
+ r = unencoded_field_get(conn,
+ ((get_block > 0) ? NULL : nbeg),
+ ((get_block > 0)
+ ? 0
+ : (size_t)(nend - nbeg)),
+ hend,
+ towrite,
+ fdh);
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ if (r == MG_FORM_FIELD_HANDLE_NEXT) {
+ /* Skip to next field */
+ field_storage = MG_FORM_FIELD_STORAGE_SKIP;
+ }
+ }
+
+#if !defined(NO_FILESYSTEMS)
+ if (field_storage == MG_FORM_FIELD_STORAGE_STORE) {
+
+ if (fstore.access.fp) {
+ n = (size_t)fwrite(hend, 1, towrite, fstore.access.fp);
+ if ((n != towrite) || (ferror(fstore.access.fp))) {
+ mg_cry_internal(conn,
+ "%s: Cannot write file %s",
+ __func__,
+ path);
+ mg_fclose(&fstore.access);
+ remove_bad_file(conn, path);
+ } else {
+ file_size += (int64_t)n;
+ r = mg_fclose(&fstore.access);
+ if (r == 0) {
+ /* stored successfully */
+ r = field_stored(conn, path, file_size, fdh);
+ if (r == MG_FORM_FIELD_HANDLE_ABORT) {
+ /* Stop request handling */
+ break;
+ }
+ } else {
+ mg_cry_internal(conn,
+ "%s: Error saving file %s",
+ __func__,
+ path);
+ remove_bad_file(conn, path);
+ }
+ }
+ fstore.access.fp = NULL;
+ }
+ }
+#endif /* NO_FILESYSTEMS */
+
+ if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
+ == MG_FORM_FIELD_STORAGE_ABORT) {
+ /* Stop parsing the request */
+ break;
+ }
+
+ /* Remove from the buffer */
+ if (next) {
+ used = next - buf + 2;
+ memmove(buf, buf + (size_t)used, sizeof(buf) - (size_t)used);
+ buf_fill -= (int)used;
+ } else {
+ buf_fill = 0;
+ }
+ }
+
+ /* All parts handled */
+ mg_free(boundary);
+ return field_count;
+ }
+
+ /* Unknown Content-Type */
+ return -1;
+}
+
+/* End of handle_form.inl */
diff -Nurp civetweb-1.16-orig/src/civetweb.c civetweb-1.16/src/civetweb.c
--- civetweb-1.16-orig/src/civetweb.c 2023-04-08 17:38:36.000000000 +0200
+++ civetweb-1.16/src/civetweb.c 2025-09-30 09:16:33.863771802 +0200
@@ -7052,6 +7052,7 @@ mg_url_decode(const char *src,
int is_form_url_encoded)
{
int i, j, a, b;
+
#define HEXTOI(x) (isdigit(x) ? (x - '0') : (x - 'W'))
for (i = j = 0; (i < src_len) && (j < (dst_len - 1)); i++, j++) {
@@ -7064,11 +7065,15 @@ mg_url_decode(const char *src,
i += 2;
} else if (is_form_url_encoded && (src[i] == '+')) {
dst[j] = ' ';
+ } else if ((unsigned char)src[i] <= ' ') {
+ return -1; /* invalid character */
} else {
dst[j] = src[i];
}
}
+#undef HEXTOI
+
dst[j] = '\0'; /* Null-terminate the destination */
return (i >= src_len) ? j : -1;
diff -Nurp civetweb-1.16-orig/src/handle_form.inl civetweb-1.16/src/handle_form.inl
--- civetweb-1.16-orig/src/handle_form.inl 2023-04-08 17:38:36.000000000 +0200
+++ civetweb-1.16/src/handle_form.inl 2025-09-30 09:16:33.863771802 +0200
@@ -39,7 +39,7 @@ url_encoded_field_found(const struct mg_
mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
if (((size_t)key_dec_len >= (size_t)sizeof(key_dec)) || (key_dec_len < 0)) {
- return MG_FORM_FIELD_STORAGE_SKIP;
+ return MG_FORM_FIELD_STORAGE_ABORT;
}
if (filename) {
@@ -53,7 +53,7 @@ url_encoded_field_found(const struct mg_
|| (filename_dec_len < 0)) {
/* Log error message and skip this field. */
mg_cry_internal(conn, "%s: Cannot decode filename", __func__);
- return MG_FORM_FIELD_STORAGE_SKIP;
+ return MG_FORM_FIELD_STORAGE_ABORT;
}
remove_dot_segments(filename_dec);
@@ -95,6 +95,7 @@ url_encoded_field_get(
struct mg_form_data_handler *fdh)
{
char key_dec[1024];
+ int key_dec_len;
char *value_dec = (char *)mg_malloc_ctx(*value_len + 1, conn->phys_ctx);
int value_dec_len, ret;
@@ -108,7 +109,8 @@ url_encoded_field_get(
return MG_FORM_FIELD_STORAGE_ABORT;
}
- mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+ key_dec_len = mg_url_decode(
+ key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
if (*value_len >= 2 && value[*value_len - 2] == '%')
*value_len -= 2;
@@ -117,6 +119,11 @@ url_encoded_field_get(
value_dec_len = mg_url_decode(
value, (int)*value_len, value_dec, ((int)*value_len) + 1, 1);
+ if ((key_dec_len < 0) || (value_dec_len < 0)) {
+ mg_free(value_dec);
+ return MG_FORM_FIELD_STORAGE_ABORT;
+ }
+
ret = fdh->field_get(key_dec,
value_dec,
(size_t)value_dec_len,
@@ -136,9 +143,13 @@ unencoded_field_get(const struct mg_conn
struct mg_form_data_handler *fdh)
{
char key_dec[1024];
+ int key_dec_len;
(void)conn;
- mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+ key_dec_len = mg_url_decode(key, (int)key_len, key_dec, (int)sizeof(key_dec), 1);
+ if (key_dec_len < 0) {
+ return MG_FORM_FIELD_STORAGE_ABORT;
+ }
return fdh->field_get(key_dec, value, value_len, fdh->user_data);
}
@@ -188,6 +199,7 @@ mg_handle_form_request(struct mg_connect
int buf_fill = 0;
int r;
int field_count = 0;
+ int abort_read = 0;
struct mg_file fstore = STRUCT_FILE_INITIALIZER;
int64_t file_size = 0; /* init here, to a avoid a false positive
"uninitialized variable used" warning */
@@ -278,6 +290,7 @@ mg_handle_form_request(struct mg_connect
conn, data, (size_t)keylen, val, (size_t *)&vallen, fdh);
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
if (r == MG_FORM_FIELD_HANDLE_NEXT) {
@@ -320,6 +333,7 @@ mg_handle_form_request(struct mg_connect
r = field_stored(conn, path, file_size, fdh);
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
@@ -358,6 +372,7 @@ mg_handle_form_request(struct mg_connect
if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
== MG_FORM_FIELD_STORAGE_ABORT) {
/* Stop parsing the request */
+ abort_read = 1;
break;
}
@@ -386,7 +401,7 @@ mg_handle_form_request(struct mg_connect
* Here we use "POST", and read the data from the request body.
* The data read on the fly, so it is not required to buffer the
* entire request in memory before processing it. */
- for (;;) {
+ while (!abort_read) {
const char *val;
const char *next;
ptrdiff_t keylen, vallen;
@@ -440,6 +455,7 @@ mg_handle_form_request(struct mg_connect
if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
== MG_FORM_FIELD_STORAGE_ABORT) {
/* Stop parsing the request */
+ abort_read = 1;
break;
}
@@ -468,6 +484,15 @@ mg_handle_form_request(struct mg_connect
} else {
vallen = (ptrdiff_t)strlen(val);
end_of_key_value_pair_found = all_data_read;
+ if ((buf + buf_fill) > (val + vallen)) {
+ /* Avoid DoS attacks by having a zero byte in the middle of
+ * a request that is supposed to be URL encoded. Since this
+ * request is certainly invalid, according to the protocol
+ * specification, stop processing it. Fixes #1348 */
+ abort_read = 1;
+ break;
+ }
+
}
if (field_storage == MG_FORM_FIELD_STORAGE_GET) {
@@ -489,6 +514,7 @@ mg_handle_form_request(struct mg_connect
get_block++;
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
if (r == MG_FORM_FIELD_HANDLE_NEXT) {
@@ -557,7 +583,6 @@ mg_handle_form_request(struct mg_connect
val = buf;
}
}
-
} while (!end_of_key_value_pair_found);
#if !defined(NO_FILESYSTEMS)
@@ -568,6 +593,7 @@ mg_handle_form_request(struct mg_connect
r = field_stored(conn, path, file_size, fdh);
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
} else {
@@ -581,7 +607,7 @@ mg_handle_form_request(struct mg_connect
}
#endif /* NO_FILESYSTEMS */
- if (all_data_read && (buf_fill == 0)) {
+ if ((all_data_read && (buf_fill == 0)) || abort_read) {
/* nothing more to process */
break;
}
@@ -937,6 +963,7 @@ mg_handle_form_request(struct mg_connect
get_block++;
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
if (r == MG_FORM_FIELD_HANDLE_NEXT) {
@@ -1011,6 +1038,7 @@ mg_handle_form_request(struct mg_connect
fdh);
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
if (r == MG_FORM_FIELD_HANDLE_NEXT) {
@@ -1039,6 +1067,7 @@ mg_handle_form_request(struct mg_connect
r = field_stored(conn, path, file_size, fdh);
if (r == MG_FORM_FIELD_HANDLE_ABORT) {
/* Stop request handling */
+ abort_read = 1;
break;
}
} else {
@@ -1057,6 +1086,7 @@ mg_handle_form_request(struct mg_connect
if ((field_storage & MG_FORM_FIELD_STORAGE_ABORT)
== MG_FORM_FIELD_STORAGE_ABORT) {
/* Stop parsing the request */
+ abort_read = 1;
break;
}
