nat64_check_ip6
if (nat64_check_ip6(&ip6->ip6_src) != 0 ||
nat64_check_ip6(&ip6->ip6_dst) != 0)
if (nat64_check_ip6(&ip6i->ip6_src) != 0 ||
nat64_check_ip6(&ip6i->ip6_dst) != 0) {
if (nat64_check_ip6(&ip6->ip6_src) != 0 ||
nat64_check_ip6(&ip6->ip6_dst) != 0) {
if (nat64_check_ip6(&daddr) != 0)