From 2338d4d7801eaaa854556666d1a06d9dcba5aa98 Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Wed, 17 Jul 2019 17:54:05 +0200
Subject: [PATCH] subtract ipv4, not ipv6

---
 p4src/actions_delta_checksum.p4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/p4src/actions_delta_checksum.p4 b/p4src/actions_delta_checksum.p4
index 0107e24..751f7f8 100644
--- a/p4src/actions_delta_checksum.p4
+++ b/p4src/actions_delta_checksum.p4
@@ -61,7 +61,7 @@ action delta_udp_from_v4_to_v6()
         tmp = tmp + 1;
         tmp[16:16] = 0;
     }
-    tmp = tmp + (bit<17>) (0xffff - meta.v6sum);
+    tmp = tmp + (bit<17>) (0xffff - meta.v4sum);
     if (tmp[16:16] == 1) {
         tmp = tmp + 1;
         tmp[16:16] = 0;
@@ -79,7 +79,7 @@ action delta_tcp_from_v4_to_v6()
         tmp = tmp + 1;
         tmp[16:16] = 0;
     }
-    tmp = tmp + (bit<17>) (0xffff - meta.v6sum);
+    tmp = tmp + (bit<17>) (0xffff - meta.v4sum);
     if (tmp[16:16] == 1) {
         tmp = tmp + 1;
         tmp[16:16] = 0;