Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
SUSE:SLE-15-SP4:Update
LibVNCServer.25843
0001-libvncserver-Add-API-to-add-custom-I-O-ent...
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File 0001-libvncserver-Add-API-to-add-custom-I-O-entry-points.patch of Package LibVNCServer.25843
From e4849b01fec4494057728d1aa3a165ed21705682 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com> Date: Mon, 11 Jun 2018 23:47:02 +0200 Subject: [PATCH 1/4] libvncserver: Add API to add custom I/O entry points Add API to make it possible to channel RFB input and output through another layer, for example TLS. This is done by making it possible to override the default read/write/peek functions. --- libvncserver/rfbserver.c | 4 ++ libvncserver/sockets.c | 79 ++++++++++++++++++++++++++++++++++++---- rfb/rfb.h | 17 +++++++++ 3 files changed, 93 insertions(+), 7 deletions(-) diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c index e9eaa5fc..72e9ba79 100644 --- a/libvncserver/rfbserver.c +++ b/libvncserver/rfbserver.c @@ -319,6 +319,10 @@ rfbNewTCPOrUDPClient(rfbScreenInfoPtr rfbScreen, cl->screen = rfbScreen; cl->sock = sock; + cl->readFromSocket = rfbDefaultReadFromSocket; + cl->peekAtSocket = rfbDefaultPeekAtSocket; + cl->hasPendingOnSocket = rfbDefaultHasPendingOnSocket; + cl->writeToSocket = rfbDefaultWriteToSocket; cl->viewOnly = FALSE; /* setup pseudo scaling */ cl->scaledScreen = rfbScreen; diff --git a/libvncserver/sockets.c b/libvncserver/sockets.c index 2c87376b..4bb881ec 100644 --- a/libvncserver/sockets.c +++ b/libvncserver/sockets.c @@ -101,6 +101,9 @@ int deny_severity=LOG_WARNING; int rfbMaxClientWait = 20000; /* time (ms) after which we decide client has gone away - needed to stop us hanging */ +static rfbBool +rfbHasPendingOnSocket(rfbClientPtr cl); + static rfbBool rfbNewConnectionFromSock(rfbScreenInfoPtr rfbScreen, rfbSocket sock) { @@ -364,16 +367,20 @@ rfbCheckFds(rfbScreenInfoPtr rfbScreen,long usec) tv.tv_usec = usec; nfds = select(rfbScreen->maxFd + 1, &fds, NULL, NULL /* &fds */, &tv); if (nfds == 0) { + rfbBool hasPendingData = FALSE; + /* timed out, check for async events */ i = rfbGetClientIterator(rfbScreen); while((cl = rfbClientIteratorNext(i))) { if (cl->onHold) continue; + hasPendingData |= rfbHasPendingOnSocket(cl); if (FD_ISSET(cl->sock, &(rfbScreen->allFds))) rfbSendFileTransferChunk(cl); } rfbReleaseClientIterator(i); - return result; + if (!hasPendingData) + return result; } if (nfds < 0) { @@ -449,9 +456,11 @@ rfbCheckFds(rfbScreenInfoPtr rfbScreen,long usec) if (cl->onHold) continue; - if (FD_ISSET(cl->sock, &(rfbScreen->allFds))) + if (rfbHasPendingOnSocket (cl) || + FD_ISSET(cl->sock, &(rfbScreen->allFds))) { - if (FD_ISSET(cl->sock, &fds)) + if (rfbHasPendingOnSocket (cl) || + FD_ISSET(cl->sock, &fds)) { #ifdef LIBVNCSERVER_WITH_WEBSOCKETS do { @@ -614,6 +623,30 @@ rfbConnect(rfbScreenInfoPtr rfbScreen, return sock; } +int +rfbDefaultReadFromSocket(rfbClientPtr cl, char *buf, int len) +{ + return read(cl->sock, buf, len); +} + +static int +rfbReadFromSocket(rfbClientPtr cl, char *buf, int len) +{ + return cl->readFromSocket(cl, buf, len); +} + +rfbBool +rfbDefaultHasPendingOnSocket(rfbClientPtr cl) +{ + return FALSE; +} + +static rfbBool +rfbHasPendingOnSocket(rfbClientPtr cl) +{ + return cl->hasPendingOnSocket(cl); +} + /* * ReadExact reads an exact number of bytes from a client. Returns 1 if * those bytes have been read, 0 if the other end has closed, or -1 if an error @@ -635,10 +668,10 @@ rfbReadExactTimeout(rfbClientPtr cl, char* buf, int len, int timeout) } else if (cl->sslctx) { n = rfbssl_read(cl, buf, len); } else { - n = read(sock, buf, len); + n = rfbReadFromSocket(cl, buf, len); } #else - n = read(sock, buf, len); + n = rfbReadFromSocket(cl, buf, len); #endif if (n > 0) { @@ -670,6 +703,10 @@ rfbReadExactTimeout(rfbClientPtr cl, char* buf, int len, int timeout) continue; } #endif + + if (rfbHasPendingOnSocket(cl)) + continue; + FD_ZERO(&fds); FD_SET(sock, &fds); tv.tv_sec = timeout / 1000; @@ -706,6 +743,18 @@ int rfbReadExact(rfbClientPtr cl,char* buf,int len) return(rfbReadExactTimeout(cl,buf,len,rfbMaxClientWait)); } +int +rfbDefaultPeekAtSocket(rfbClientPtr cl, char *buf, int len) +{ + return recv(cl->sock, buf, len, MSG_PEEK); +} + +int +rfbPeekAtSocket(rfbClientPtr cl, char *buf, int len) +{ + return cl->peekAtSocket(cl, buf, len); +} + /* * PeekExact peeks at an exact number of bytes from a client. Returns 1 if * those bytes have been read, 0 if the other end has closed, or -1 if an @@ -726,7 +775,7 @@ rfbPeekExactTimeout(rfbClientPtr cl, char* buf, int len, int timeout) n = rfbssl_peek(cl, buf, len); else #endif - n = recv(sock, buf, len, MSG_PEEK); + n = rfbPeekAtSocket(cl, buf, len); if (n == len) { @@ -782,6 +831,22 @@ rfbPeekExactTimeout(rfbClientPtr cl, char* buf, int len, int timeout) return 1; } +int +rfbDefaultWriteToSocket(rfbClientPtr cl, + const char *buf, + int len) +{ + return write(cl->sock, buf, len); +} + +static int +rfbWriteToSocket(rfbClientPtr cl, + const char *buf, + int len) +{ + return cl->writeToSocket(cl, buf, len); +} + /* * WriteExact writes an exact number of bytes to a client. Returns 1 if * those bytes have been written, or -1 if an error occurred (errno is set to @@ -826,7 +891,7 @@ rfbWriteExact(rfbClientPtr cl, n = rfbssl_write(cl, buf, len); else #endif - n = write(sock, buf, len); + n = rfbWriteToSocket(cl, buf, len); if (n > 0) { diff --git a/rfb/rfb.h b/rfb/rfb.h index 5e9ba86f..3c0b25a3 100644 --- a/rfb/rfb.h +++ b/rfb/rfb.h @@ -387,6 +387,14 @@ typedef struct sraRegion* sraRegionPtr; typedef void (*ClientGoneHookPtr)(struct _rfbClientRec* cl); typedef void (*ClientFramebufferUpdateRequestHookPtr)(struct _rfbClientRec* cl, rfbFramebufferUpdateRequestMsg* furMsg); +typedef int (*ClientReadFromSocket)(struct _rfbClientRec* cl, + char *buf, int len); +typedef int (*ClientPeekAtSocket)(struct _rfbClientRec* cl, + char *buf, int len); +typedef rfbBool (*ClientHasPendingOnSocket)(struct _rfbClientRec* cl); +typedef int (*ClientWriteToSocket)(struct _rfbClientRec* cl, + const char *buf, int len); + typedef struct _rfbFileTransferData { int fd; int compressionEnabled; @@ -680,6 +688,11 @@ typedef struct _rfbClientRec { rfbBool useExtDesktopSize; int requestedDesktopSizeChange; int lastDesktopSizeChangeError; + + ClientReadFromSocket readFromSocket; /* Read data from socket */ + ClientPeekAtSocket peekAtSocket; /* Peek at data from socket */ + ClientHasPendingOnSocket hasPendingOnSocket; /* Peek at data from socket */ + ClientWriteToSocket writeToSocket; /* Write data to socket */ } rfbClientRec, *rfbClientPtr; /** @@ -732,8 +745,12 @@ extern void rfbDisconnectUDPSock(rfbScreenInfoPtr rfbScreen); extern void rfbCloseClient(rfbClientPtr cl); extern int rfbReadExact(rfbClientPtr cl, char *buf, int len); extern int rfbReadExactTimeout(rfbClientPtr cl, char *buf, int len,int timeout); +extern int rfbDefaultReadFromSocket(rfbClientPtr cl, char *buf, int len); extern int rfbPeekExactTimeout(rfbClientPtr cl, char *buf, int len,int timeout); +extern int rfbDefaultPeekAtSocket(rfbClientPtr cl, char *buf, int len); +extern rfbBool rfbDefaultHasPendingOnSocket(rfbClientPtr cl); extern int rfbWriteExact(rfbClientPtr cl, const char *buf, int len); +extern int rfbDefaultWriteToSocket(rfbClientPtr cl, const char *buf, int len); extern int rfbCheckFds(rfbScreenInfoPtr rfbScreen,long usec); extern rfbSocket rfbConnect(rfbScreenInfoPtr rfbScreen, char* host, int port); extern rfbSocket rfbConnectToTcpAddr(char* host, int port); -- 2.28.0
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor
