mc.imr_multiaddr.s_addr = inet_addr("224.0.0.251");
mc.imr_interface.s_addr = htonl(INADDR_ANY);
- setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mc, sizeof(mc));
+ setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mc, sizeof(mc));
setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ittl, sizeof(ittl));