From 789ef9823c23e7b7cf219384e659d48d3b03e2b4 Mon Sep 17 00:00:00 2001
From: Antonin Bas <antonin@barefootnetworks.com>
Date: Thu, 18 May 2017 17:29:34 -0700
Subject: [PATCH] Enable arith for checksum target field (#373)

---
 src/bm_sim/P4Objects.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bm_sim/P4Objects.cpp b/src/bm_sim/P4Objects.cpp
index ba979afff..f40876426 100644
--- a/src/bm_sim/P4Objects.cpp
+++ b/src/bm_sim/P4Objects.cpp
@@ -1856,6 +1856,7 @@ P4Objects::init_checksums(const Json::Value &cfg_root) {
     header_id_t header_id = get_header_id(header_name);
     const string field_name = cfg_cksum_field[1].asString();
     int field_offset = get_field_offset(header_id, field_name);
+    enable_arith(header_id, field_offset);
 
     Checksum *checksum;
     if (checksum_type == "ipv4") {