From d5e147d400aafce96ddd568026918222b6400914 Mon Sep 17 00:00:00 2001
From: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
Date: Tue, 5 Jun 2007 15:59:07 +0200
Subject: [PATCH] deal with packet with zero headers correctly

---
 src/common/packet-history.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/common/packet-history.cc b/src/common/packet-history.cc
index 60ab5efcf..bea6be0f5 100644
--- a/src/common/packet-history.cc
+++ b/src/common/packet-history.cc
@@ -548,11 +548,16 @@ PacketHistory::IsFF16 (uint16_t index)
 bool
 PacketHistory::CanAdd (bool atStart)
 {
-  if (atStart && m_begin != 0xffff)
+  if (m_begin == 0xffff)
+    {
+      NS_ASSERT (m_end == 0xffff);
+      return true;
+    }
+  if (atStart)
     {
       return IsFF16 (m_begin+2);
     }
-  else if (!atStart && m_end != 0xffff)
+  else if (!atStart)
     {
       return IsFF16 (m_end);
     }