RTNLGRP_IPV4_ROUTE 524 net/ipv4/fib_semantics.c rtnl_notify(skb, info->nl_net, info->portid, RTNLGRP_IPV4_ROUTE, RTNLGRP_IPV4_ROUTE 529 net/ipv4/fib_semantics.c rtnl_set_sk_err(info->nl_net, RTNLGRP_IPV4_ROUTE, err);