prefixnet_is_nat64
if(!prefixnet_is_nat64(nat64->nat64_prefix_net)) {
log_assert(prefixnet_is_nat64(nat64_prefixnet));
int prefixnet_is_nat64(int prefixnet);
if(!prefixnet_is_nat64(nat64->nat64_prefix_net)) {
log_assert(prefixnet_is_nat64(nat64_prefixnet));
int prefixnet_is_nat64(int prefixnet);