diff options
Diffstat (limited to 'lib/sockopt.c')
| -rw-r--r-- | lib/sockopt.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/lib/sockopt.c b/lib/sockopt.c index 81db88d9..655ecdc0 100644 --- a/lib/sockopt.c +++ b/lib/sockopt.c @@ -171,8 +171,7 @@ setsockopt_multicast_ipv4(int sock, unsigned int ifindex) { - /* Linux 2.2.0 and up */ -#if defined(GNU_LINUX) && LINUX_VERSION_CODE > 131584 +#ifdef HAVE_STRUCT_IP_MREQN_IMR_IFINDEX /* This is better because it uses ifindex directly */ struct ip_mreqn mreqn; @@ -212,11 +211,16 @@ setsockopt_multicast_ipv4(int sock, struct in_addr m; struct ip_mreq mreq; +#ifdef HAVE_BSD_STRUCT_IP_MREQ_HACK + if (ifindex) + m.s_addr = htonl(ifindex); + else +#endif + m = if_addr; + switch (optname) { case IP_MULTICAST_IF: - m = if_addr; - return setsockopt (sock, IPPROTO_IP, optname, (void *)&m, sizeof(m)); break; @@ -224,7 +228,7 @@ setsockopt_multicast_ipv4(int sock, case IP_DROP_MEMBERSHIP: memset (&mreq, 0, sizeof(mreq)); mreq.imr_multiaddr.s_addr = mcast_addr; - mreq.imr_interface = if_addr; + mreq.imr_interface = m; return setsockopt (sock, IPPROTO_IP, |