Enable NAT64/NAT46 in apply block

p4src/static-mapping.p4

@@ -329,9 +329,11 @@ control MyIngress(inout headers hdr,
         if(hdr.ipv6.isValid()) {
 
             icmp6.apply(); /* icmp6 echo, icmp6 ndp */
+            nat64.apply(); /* v6 -> v4 */
             v6_networks.apply(); /* routing, egress */
         }
         if(hdr.ipv4.isValid()) {
+            nat46.apply(); /* v4->v6 */
             v4_networks.apply();
         }
     }