v4 if next to v6 if, not to nat64

doc/plan.org

@@ -6787,6 +6787,25 @@ action delta_udp_from_v6_to_v4()
 
 #+END_CENTER
 
+*** TODO 2019-07-25: BUG overwrite
+#+BEGIN_CENTER
+make -C src/
+make[1]: Entering directory '/home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/src'
+p4c-sdnet -o minip4.sdnet --sdnet_info .sdnet_switch_info.dat minip4_solution.p4
+minip4_solution.p4(19): [--Wwarn=uninitialized_out_param] warning: out parameter meta may be uninitialized when RealParser terminates
+    out metadata meta,
+                 ^^^^
+minip4_solution.p4(16)
+parser RealParser(
+       ^^^^^^^^^^
+terminate called after throwing an instance of 'Util::CompilerBug'
+  what():  In file: /wrk/hdscratch/staff/mohan/p4c_sdnet/build/p4c/extensions/sdnet/translate/core/tupleEngine.cpp:324
+Compiler Bug: overwrite
+
+Makefile:34: recipe for target 'all' failed
+
+#+END_CENTER
+
 ** The NetPFGA saga
 Problems encountered:
 - The logfile for a compile run is 10k+ lines

p4src/minip4_solution.p4

@@ -130,35 +130,35 @@ control RealMain(
 
                 v4_networks.apply();       /* apply egress for IPv4 */
                 exit;                      /* no further v6 processing */
+            }
+        } else if(hdr.ipv4.isValid()) {
+            if(nat46.apply().hit) {
+                if(hdr.icmp.isValid()) {
+                    nat46_icmp_generic();
 
-            } else if(hdr.ipv4.isValid()) {
-                if(nat46.apply().hit) {
-                    if(hdr.icmp.isValid()) {
-                        nat46_icmp_generic();
-
-                        if(hdr.icmp.type == ICMP_ECHO_REPLY) {
-                            hdr.icmp6.type = ICMP6_ECHO_REPLY;
-                        }
-                        if(hdr.icmp.type == ICMP_ECHO_REQUEST) {
-                            hdr.icmp6.type = ICMP6_ECHO_REQUEST;
-                        }
+                    if(hdr.icmp.type == ICMP_ECHO_REPLY) {
+                        hdr.icmp6.type = ICMP6_ECHO_REPLY;
                     }
-                    if(hdr.udp.isValid()) {
-                        delta_udp_from_v4_to_v6
+                    if(hdr.icmp.type == ICMP_ECHO_REQUEST) {
+                        hdr.icmp6.type = ICMP6_ECHO_REQUEST;
                     }
-                    if(hdr.tcp.isValid()) {
-                        delta_tcp_from_v4_to_v6
                     }
-
-                    v6_networks.apply();
-                    exit;
+                if(hdr.udp.isValid()) {
+                    delta_udp_from_v4_to_v6
                 }
-                v4_networks.apply();             /* regular routing, egress */
+                if(hdr.tcp.isValid()) {
+                    delta_tcp_from_v4_to_v6
+                }
+
+                v6_networks.apply();
+                exit;
             }
+            v4_networks.apply();             /* regular routing, egress */
         }
 
         lookup_table.apply();
     }
+
 }
 
 control TopPipe(