From 9422db0081184d84a28cad8a5e6cfa0191c7df4a Mon Sep 17 00:00:00 2001
From: John Abraham <john.abraham@gatech.edu>
Date: Tue, 18 Oct 2011 18:18:23 -0400
Subject: [PATCH] Bug 1281 Checksum not calculated when doing IP fragmentation

---
 src/internet/model/ipv4-l3-protocol.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/internet/model/ipv4-l3-protocol.cc b/src/internet/model/ipv4-l3-protocol.cc
index 7c2a8f7e5..37c986ddc 100644
--- a/src/internet/model/ipv4-l3-protocol.cc
+++ b/src/internet/model/ipv4-l3-protocol.cc
@@ -1168,6 +1168,11 @@ Ipv4L3Protocol::DoFragmentation (Ptr<Packet> packet, uint32_t outIfaceMtu, std::
       fragmentHeader.SetFragmentOffset (offset);
       fragmentHeader.SetPayloadSize (currentFragmentablePartSize);
 
+      if (Node::ChecksumEnabled ())
+        {
+          fragmentHeader.EnableChecksum ();
+        }
+
       NS_LOG_LOGIC ("Fragment check - " << fragmentHeader.GetFragmentOffset ()  );
 
       NS_LOG_LOGIC ("New fragment Header " << fragmentHeader);