Symbol: RTNLGRP_IPV4_MCADDR
net/ipv4/igmp.c
1495
rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MCADDR, NULL, GFP_KERNEL);
net/ipv4/igmp.c
1498
rtnl_set_sk_err(net, RTNLGRP_IPV4_MCADDR, err);