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corosync.openSUSE_Leap_15.1_Update
bug-1163460-totemip-Add-support-for-sin6_scope_...
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File bug-1163460-totemip-Add-support-for-sin6_scope_id.patch of Package corosync.openSUSE_Leap_15.1_Update
From d963c2ab6cac0bf18355159afd815c0eb78e4aa8 Mon Sep 17 00:00:00 2001 From: Jan Friesse <jfriesse@redhat.com> Date: Mon, 27 Jul 2020 16:10:54 +0200 Subject: [PATCH] totemip: Add support for sin6_scope_id sin6_scope_id is not present in totemip structure making impossible to use link-local ipv6 address. Patch adds new call totemip_totemip_to_sockaddr_convert_with_scopeid which can be instructed to fill scope id. This function calls totemip_getif_scopeid which walks local addresses and returns scope id if interface matches. Main difference between this patch and 934c47ed4384daf2819c26306bebba3225807499 is fact, that totemip structure keeps unchanged so corosync stays wire compatible. This makes corosync work with link-local addresses fine for both UDPU and UDP transport as long as there is only one matching interface with this patch. Big thanks to Aleksei Burlakov <aburlakov@suse.com> who brought idea (and implementation) of using totemip_getif_scopeid. Signed-off-by: Jan Friesse <jfriesse@redhat.com> Reviewed-by: Christine Caulfield <ccaulfie@redhat.com> --- exec/totemip.c | 69 ++++++++++++++++++++++++++++++-- exec/totemudp.c | 7 ++-- exec/totemudpu.c | 6 ++- include/corosync/totem/totemip.h | 4 ++ 4 files changed, 77 insertions(+), 9 deletions(-) diff --git a/exec/totemip.c b/exec/totemip.c index f89c70a04..4f08f5375 100644 --- a/exec/totemip.c +++ b/exec/totemip.c @@ -50,6 +50,7 @@ #include <stdlib.h> #include <unistd.h> #include <ifaddrs.h> +#include <corosync/logsys.h> #include <corosync/totem/totemip.h> #include <corosync/swab.h> @@ -267,11 +268,58 @@ const char *totemip_print(const struct totem_ip_address *addr) return (inet_ntop(addr->family, addr->addr, buf, sizeof(buf))); } -/* Make a totem_ip_address into a usable sockaddr_storage */ -int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr, - uint16_t port, struct sockaddr_storage *saddr, int *addrlen) +static int totemip_getif_scopeid(const unsigned char *addr16, unsigned int *scopeid) +{ + struct ifaddrs *ifa; + const struct sockaddr_in6 *sin6; + const socklen_t addr_len = sizeof(struct in6_addr); + int rc = -1; // 0 = found 1 match; -1 = found 0 matches; -2 = found >1 matches + struct ifaddrs *totemip_getif_scopeid_ifap; + + if (getifaddrs(&totemip_getif_scopeid_ifap) != 0) { + return (-1); + } + + for (ifa = totemip_getif_scopeid_ifap; ifa; ifa = ifa->ifa_next) { + if (ifa->ifa_addr == NULL || ifa->ifa_netmask == NULL) + continue ; + + if ((ifa->ifa_addr->sa_family != AF_INET6) || + (ifa->ifa_netmask->sa_family != AF_INET6 && + ifa->ifa_netmask->sa_family != 0)) + continue ; + + sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr; + + if (memcmp(&sin6->sin6_addr, addr16, addr_len) == 0) { + *scopeid = sin6->sin6_scope_id; + + if (rc == -1) { + rc = 0; + } else { + rc = -2; + } + } + } + + if (rc == -2) { + log_printf(LOGSYS_LEVEL_WARNING, "(%s) exists on several interfaces." + " Use 'ip a' to see details.", + totemip_sa_print(ifa->ifa_addr)); + } + + freeifaddrs(totemip_getif_scopeid_ifap); + + return rc; +} + + +int totemip_totemip_to_sockaddr_convert_with_scopeid(const struct totem_ip_address *ip_addr, + uint16_t port, struct sockaddr_storage *saddr, int *addrlen, + int fill_scopeid) { int ret = -1; + unsigned int scopeid; if (ip_addr->family == AF_INET) { struct sockaddr_in *sin = (struct sockaddr_in *)saddr; @@ -296,7 +344,11 @@ int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr, #endif sin->sin6_family = ip_addr->family; sin->sin6_port = ntohs(port); - sin->sin6_scope_id = 2; + if (fill_scopeid) { + if (totemip_getif_scopeid(ip_addr->addr, &scopeid) == 0) { + sin->sin6_scope_id = scopeid; + } + } memcpy(&sin->sin6_addr, ip_addr->addr, sizeof(struct in6_addr)); *addrlen = sizeof(struct sockaddr_in6); @@ -306,6 +358,15 @@ int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr, return ret; } +/* Make a totem_ip_address into a usable sockaddr_storage */ +int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr, + uint16_t port, struct sockaddr_storage *saddr, int *addrlen) +{ + + return (totemip_totemip_to_sockaddr_convert_with_scopeid(ip_addr, port, saddr, addrlen, 0)); +} + + /* Converts an address string string into a totem_ip_address. family can be AF_INET, AF_INET6 or 0 ("for "don't care") */ diff --git a/exec/totemudp.c b/exec/totemudp.c index 4b644aee3..c11bbe8e6 100644 --- a/exec/totemudp.c +++ b/exec/totemudp.c @@ -834,8 +834,8 @@ static int totemudp_build_sockets_ip ( return (-1); } - totemip_totemip_to_sockaddr_convert(bound_to, instance->totem_interface->ip_port - 1, - &sockaddr, &addrlen); + totemip_totemip_to_sockaddr_convert_with_scopeid(bound_to, instance->totem_interface->ip_port - 1, + &sockaddr, &addrlen, 1); retries = 0; while (1) { @@ -890,7 +890,8 @@ static int totemudp_build_sockets_ip ( * Bind to unicast socket used for token send/receives * This has the side effect of binding to the correct interface */ - totemip_totemip_to_sockaddr_convert(bound_to, instance->totem_interface->ip_port, &sockaddr, &addrlen); + totemip_totemip_to_sockaddr_convert_with_scopeid(bound_to, instance->totem_interface->ip_port, + &sockaddr, &addrlen, 1); retries = 0; while (1) { diff --git a/exec/totemudpu.c b/exec/totemudpu.c index f9d50af26..1d9410f65 100644 --- a/exec/totemudpu.c +++ b/exec/totemudpu.c @@ -824,7 +824,9 @@ static int totemudpu_build_sockets_ip ( * Bind to unicast socket used for token send/receives * This has the side effect of binding to the correct interface */ - totemip_totemip_to_sockaddr_convert(bound_to, instance->totem_interface->ip_port, &sockaddr, &addrlen); + totemip_totemip_to_sockaddr_convert_with_scopeid(bound_to, instance->totem_interface->ip_port, + &sockaddr, &addrlen, 1); + while (1) { res = bind (instance->token_socket, (struct sockaddr *)&sockaddr, addrlen); if (res == 0) { @@ -1331,7 +1333,7 @@ static int totemudpu_create_sending_socket( /* * Bind to sending interface */ - totemip_totemip_to_sockaddr_convert(&instance->my_id, 0, &sockaddr, &addrlen); + totemip_totemip_to_sockaddr_convert_with_scopeid(&instance->my_id, 0, &sockaddr, &addrlen, 1); res = bind (fd, (struct sockaddr *)&sockaddr, addrlen); if (res == -1) { LOGSYS_PERROR (errno, instance->totemudpu_log_level_warning, diff --git a/include/corosync/totem/totemip.h b/include/corosync/totem/totemip.h index 891a0524b..2a63317b1 100644 --- a/include/corosync/totem/totemip.h +++ b/include/corosync/totem/totemip.h @@ -97,6 +97,10 @@ extern int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr, uint16_t port, struct sockaddr_storage *saddr, int *addrlen); extern int totemip_parse(struct totem_ip_address *totemip, const char *addr, int family); +extern int totemip_totemip_to_sockaddr_convert_with_scopeid(const struct totem_ip_address *ip_addr, + uint16_t port, struct sockaddr_storage *saddr, int *addrlen, + int fill_scopeid); + extern int totemip_iface_check(struct totem_ip_address *bindnet, struct totem_ip_address *boundto, int *interface_up,
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