INADDR_ALLHOSTS_GROUP
m.imr_multiaddr.s_addr = htonl(INADDR_ALLHOSTS_GROUP);
m.imr_multiaddr.s_addr = htonl(INADDR_ALLHOSTS_GROUP);
send_adv(ifp, htonl(INADDR_ALLHOSTS_GROUP),
if (ip->ip_dst.s_addr != INADDR_ALLHOSTS_GROUP) {
(ip->ip_dst.s_addr == INADDR_ALLHOSTS_GROUP ||
addr.s_addr = INADDR_ALLHOSTS_GROUP;
{ .s_addr = ntohl(INADDR_ALLHOSTS_GROUP) },
allhosts_group = htonl(INADDR_ALLHOSTS_GROUP);