get_l4proto 401 net/netfilter/nf_conntrack_core.c protoff = get_l4proto(skb, nhoff, l3num, &protonum); get_l4proto 1688 net/netfilter/nf_conntrack_core.c dataoff = get_l4proto(skb, skb_network_offset(skb), state->pf, &protonum); get_l4proto 1896 net/netfilter/nf_conntrack_core.c dataoff = get_l4proto(skb, skb_network_offset(skb), l3num, &l4num);