mreqn 400 net/tipc/udp_media.c struct ip_mreqn mreqn; mreqn 404 net/tipc/udp_media.c mreqn.imr_multiaddr = remote->ipv4; mreqn 405 net/tipc/udp_media.c mreqn.imr_ifindex = ub->ifindex; mreqn 406 net/tipc/udp_media.c err = ip_mc_join_group(sk, &mreqn);