From fc5cd8e466d5b2a90a7f21d5e1f5eb06c8ff787a Mon Sep 17 00:00:00 2001
From: John Abraham <john.abraham.in@gmail.com>
Date: Wed, 31 Oct 2012 23:17:27 -0700
Subject: [PATCH] NetAnim: Skip ipaddress check if index cannot be found

---
 src/netanim/model/animation-interface.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/netanim/model/animation-interface.cc b/src/netanim/model/animation-interface.cc
index 748cd5f5a..70a97dd2c 100644
--- a/src/netanim/model/animation-interface.cc
+++ b/src/netanim/model/animation-interface.cc
@@ -363,7 +363,12 @@ std::string AnimationInterface::GetIpv4Address (Ptr <NetDevice> nd)
   Ptr<Ipv4> ipv4 = NodeList::GetNode (nd->GetNode ()->GetId ())->GetObject <Ipv4> ();
   if (!ipv4)
     return "0.0.0.0";
-  uint32_t ifIndex = ipv4->GetInterfaceForDevice (nd);
+  int32_t ifIndex = ipv4->GetInterfaceForDevice (nd);
+  if (ifIndex == -1)
+    {
+      NS_LOG_WARN ("Node :" << nd->GetNode ()->GetId () << " Could not find index of NetDevice");
+      return "0.0.0.0";
+    }
   Ipv4InterfaceAddress addr = ipv4->GetAddress (ifIndex, 0);
   std::ostringstream oss;
   oss << addr.GetLocal ();