From b972accc73a9738aa20e5f2ea794b64d61b53e6a Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Sun, 5 May 2019 13:48:05 +0200
Subject: [PATCH] [refactor] nat64 now - not only static mapping anymore

---
 doc/plan.org                          |  7 +++++--
 p4src/{static-mapping.p4 => nat64.p4} | 23 ++++++++++++++++++++++-
 2 files changed, 27 insertions(+), 3 deletions(-)
 rename p4src/{static-mapping.p4 => nat64.p4} (95%)

diff --git a/doc/plan.org b/doc/plan.org
index 0003f17..7ba0279 100644
--- a/doc/plan.org
+++ b/doc/plan.org
@@ -1433,7 +1433,6 @@ Please make sure that it is installed and available in your $PATH:
      - Longer than /96: suffix support
 
 
-
 ** Motivation
    TBD
 ** Translation mechanisms
@@ -1478,7 +1477,7 @@ user@T:~# iptables  -t mangle -A PREROUTING \
 ```
 5656
 *** Cisco (?)
-** P4 based implementation
+** TODO P4 based implementation
 *** General
 
     - IPv6 subnet 2001:db8::/32
@@ -1856,7 +1855,11 @@ libnanomsg-dev libjudy-dev
 
 ***** TODO Case IPv4 initiator
       - Needs upper level protol
+**** TODO General network matching
+***** TODO Create table
+***** TODO Fill it up from the controller
 **** TODO tcp session
+
 **** TODO udp session
 **** TODO tcp session
 ** TODO Comparison with existing tools (Performance, Features)
diff --git a/p4src/static-mapping.p4 b/p4src/nat64.p4
similarity index 95%
rename from p4src/static-mapping.p4
rename to p4src/nat64.p4
index 67d9b0a..4dc222a 100644
--- a/p4src/static-mapping.p4
+++ b/p4src/nat64.p4
@@ -234,6 +234,10 @@ Echo or Echo Reply Message
 
     /********************** NAT64 sessions   ***********************************/
 
+    /* Create a session:
+    - Send data to controller
+    => controller creates entry in the session table (?)
+
     action nat64_create_session()
     {
 
@@ -252,7 +256,7 @@ Echo or Echo Reply Message
         default_action = controller_debug_table_id(TABLE_NAT64_SESSION);
     }
 
-    table nat64_tcp {
+    table nat64_tcp_session {
         key = {
             hdr.ipv6.src_addr: exact;
             hdr.ipv6.dst_addr: exact;
@@ -469,6 +473,23 @@ Echo or Echo Reply Message
 	/********************** APPLYING TABLES ***********************************/
     apply {
         if(hdr.ipv6.isValid()) {
+            /* We hit an entry in the dynamic IPv6 range */
+            if(nat64_session.apply().hit) {
+                // if(hdr.icmp6.isValid()) {
+                //     /* If this is not a hit => will escalate to controller
+                //      * If this is a hit, it has a mapping */
+                //     nat64_icmp6_session.apply();
+                // }
+                // if(hdr.udp.isValid()) {
+                //     nat64_udp_session.apply();
+                //     meta.chk_udp_v4 = 1;
+                // }
+                if(hdr.tcp.isValid()) {
+                    nat64_tcp_session.apply();
+                    meta.chk_tcp_v4 = 1;
+                }
+            }
+
             if(nat64.apply().hit) { /* generic / static nat64 done */
                 if(hdr.icmp6.isValid()) {
                     nat64_icmp6_generic();