From 368ad03792eb2e1f814a13b4093233cbe2facd4d Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Sat, 23 Feb 2019 14:29:36 +0100
Subject: [PATCH] [P4] only apply tables on valid headers

---
 p4src/static-mapping.p4 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/p4src/static-mapping.p4 b/p4src/static-mapping.p4
index 77c7602..7f60884 100644
--- a/p4src/static-mapping.p4
+++ b/p4src/static-mapping.p4
@@ -46,8 +46,12 @@ control MyIngress(inout headers hdr,
     }
 
     apply {
-        v6_routing.apply()
-        v4_routing.apply()
+        if(hdr.ipv6.isValid()) {
+            v6_routing.apply();
+        }
+        if(hdr.ipv4.isValid()) {
+            v4_routing.apply();
+        }
     }
 }