zhaoway@qhq ~/linux-2.4.19/net/ipv4 $ grep -n NF_HOOK *.c
arp.c:591:NF_HOOK(NF_ARP, NF_ARP_OUT, skb, NULL, dev, dev_queue_xmit);
arp.c:871:return NF_HOOK(NF_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
igmp.c:187:/* Don't just hand NF_HOOK skb->dst->output, in case netfilter hook
igmp.c:252:return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
ip_forward.c:145:return NF_HOOK(PF_INET, NF_IP_FORWARD, skb, skb->dev, dev2,
ip_gre.c:668:/* Need this wrapper because NF_HOOK takes the function address */
ip_input.c:302:return NF_HOOK(PF_INET, NF_IP_LOCAL_IN, skb, skb->dev, NULL,
ip_input.c:437:return NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, dev, NULL,
ip_output.c:111:/* Don't just hand NF_HOOK skb->dst->output, in case netfilter hook
ip_output.c:156:return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
ip_output.c:191:return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, dev,
ip_output.c:233:NF_HOOK(PF_INET, NF_IP_POST_ROUTING, newskb, NULL,
ip_output.c:249:NF_HOOK(PF_INET, NF_IP_POST_ROUTING, newskb, NULL,
ip_output.c:400:return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
ip_output.c:603:err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,
ip_output.c:714:err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
ipip.c:516:/* Need this wrapper because NF_HOOK takes the function address */
ipmr.c:1211:NF_HOOK(PF_INET, NF_IP_FORWARD, skb2, skb->dev, dev,
zhaoway@qhq ~/linux-2.4.19/net/ipv4 $
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