diff -r 6e16bf523c55 src/node/packet-socket.cc
--- a/src/node/packet-socket.cc	Wed Mar 03 08:33:26 2010 -0800
+++ b/src/node/packet-socket.cc	Fri Mar 05 14:51:00 2010 +0000
@@ -358,7 +358,10 @@
     {
       return;
     }
-
+  if (!HasDataRecvCallback ())
+    {
+      return;
+    }
 
   PacketSocketAddress address;
   address.SetPhysicalAddress (from);
diff -r 6e16bf523c55 src/node/socket.h
--- a/src/node/socket.h	Wed Mar 03 08:33:26 2010 -0800
+++ b/src/node/socket.h	Fri Mar 05 14:51:00 2010 +0000
@@ -555,6 +555,7 @@
   void NotifyDataSent (uint32_t size);
   void NotifySend (uint32_t spaceAvailable);
   void NotifyDataRecv (void);
+  bool HasDataRecvCallback () const { return !m_receivedData.IsNull (); }
   virtual void DoDispose (void);
   Ptr<NetDevice> m_boundnetdevice;
 private: