IP_MULTICAST_IF
if (option == IP_MULTICAST_IF) {
if (option == IP_MULTICAST_IF) {
SOCKET_OPTION_INFO_ENTRY(IPPROTO_IP, IP_MULTICAST_IF),
if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,