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rtp-recv: Only try adding the group membership for multicast addresses

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This commit is contained in:
Laurentiu Nicola 2014-01-07 20:26:50 +02:00 • committed by Tanu Kaskinen
parent 25b7b39367
commit 88abd6c49e
1 changed files with 17 additions and 8 deletions
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25
src/modules/rtp/module-rtp-recv.c
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@ -450,17 +450,26 @@ static int mcast_socket(const struct sockaddr* sa, socklen_t salen) {
goto fail; goto fail;
} }
r = 0;
if (af == AF_INET) { if (af == AF_INET) {
struct ip_mreq mr4; /* IPv4 multicast addresses are in the 224.0.0.0-239.255.255.255 range */
memset(&mr4, 0, sizeof(mr4)); static const uint32_t ipv4_mcast_mask = 0xe0000000;
mr4.imr_multiaddr = ((const struct sockaddr_in*) sa)->sin_addr;
r = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mr4, sizeof(mr4)); if ((ntohl(((const struct sockaddr_in*) sa)->sin_addr.s_addr) & ipv4_mcast_mask) == ipv4_mcast_mask) {
struct ip_mreq mr4;
memset(&mr4, 0, sizeof(mr4));
mr4.imr_multiaddr = ((const struct sockaddr_in*) sa)->sin_addr;
r = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mr4, sizeof(mr4));
}
#ifdef HAVE_IPV6 #ifdef HAVE_IPV6
} else if (af == AF_INET6) { } else if (af == AF_INET6) {
struct ipv6_mreq mr6; /* IPv6 multicast addresses have 255 as the most significant byte */
memset(&mr6, 0, sizeof(mr6)); if (((const struct sockaddr_in6*) sa)->sin6_addr.s6_addr[0] == 0xff) {
mr6.ipv6mr_multiaddr = ((const struct sockaddr_in6*) sa)->sin6_addr; struct ipv6_mreq mr6;
r = setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mr6, sizeof(mr6)); memset(&mr6, 0, sizeof(mr6));
mr6.ipv6mr_multiaddr = ((const struct sockaddr_in6*) sa)->sin6_addr;
r = setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mr6, sizeof(mr6));
}
#endif #endif
} else } else
pa_assert_not_reached(); pa_assert_not_reached();