Symbol: MSG_MCAST
sys/kern/uipc_socket.c
1064
flags |= MSG_MCAST;
usr.sbin/ldpd/packet.c
170
multicast = (m.msg_flags & MSG_MCAST) ? 1 : 0;
usr.sbin/ripd/packet.c
176
if ((msg.msg_flags & MSG_MCAST) == 0 && srcport == RIP_PORT)