Hi Ross,
We discussed several times about this subject and I would like to share what I
understood from exchanges with RedHat support.
It seems that kernel maintainers chose to keep the backward compatibility with
a default that cause receiving data from all multicast groups and not only from
joined multicast group.
But they add since kernel 2.6.31 an option that allow to avoid this.
In a test program, I tryied adding
#if defined(__linux__) && !defined(IP_MULTICAST_ALL)
#warning linux is not able to filter multicast group that share
same port without IP_MULTICAST_ALL option
#endif
#ifdef IP_MULTICAST_ALL
int mc_all = 0;
if ((setsockopt(sock, IPPROTO_IP, IP_MULTICAST_ALL, (void*) &mc_all,
sizeof(mc_all))) < 0) {
perror("setsockopt() failed");
exit(1);
}
#endif
After this, multicast filter works "normally" (like windows & FreeBSD)
Do you think it could be possible to set this option in socketJoinGroup in a
future release of live555 ?
Best Regards,
Michel.
[@@ THALES GROUP INTERNAL @@]
_______________________________________________
live-devel mailing list
live-devel@lists.live555.com
http://lists.live555.com/mailman/listinfo/live-devel
