nf_dup_ipv6
void nf_dup_ipv6(struct net *net, struct sk_buff *skb, unsigned int hooknum,
EXPORT_SYMBOL_GPL(nf_dup_ipv6);
nf_dup_ipv6(nft_net(pkt), pkt->skb, nft_hook(pkt), gw, oif);
nf_dup_ipv6(xt_net(par), skb, xt_hooknum(par), &info->gw.in6, oif);