nf_hook 98 net/ipv4/ip_output.c return nf_hook(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, skb->dst->dev, nf_hook 81 net/ipv6/ip6_output.c return nf_hook(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dst->dev, nf_hook 128 net/xfrm/xfrm_output.c err = nf_hook(skb->dst->ops->family,