ip6_tnl_err       503 net/ipv6/ip6_tunnel.c 	err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code,
ip6_tnl_err       597 net/ipv6/ip6_tunnel.c 	err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code,