nf_confirm
unsigned int nf_confirm(void *priv, struct sk_buff *skb, const struct nf_hook_state *state);
ret = nf_confirm(priv, skb, state);
EXPORT_SYMBOL_GPL(nf_confirm);
.hook = nf_confirm,
.hook = nf_confirm,
.hook = nf_confirm,
.hook = nf_confirm,