--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/node/ipv4-l4-demux.cc	Thu Feb 08 15:37:48 2007 +0100
@@ -0,0 +1,74 @@
+// -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*-
+//
+// Copyright (c) 2006 Georgia Tech Research Corporation
+// All rights reserved.
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// Author: George F. Riley<riley@ece.gatech.edu>
+//
+
+// Define the layer 4 demultiplexer object for ns3.
+// George F. Riley, Georgia Tech, Fall 2006
+
+#include "ipv4-l4-demux.h"
+#include "ipv4-l4-protocol.h"
+
+namespace ns3 {
+
+Ipv4L4Demux::Ipv4L4Demux ()
+{}
+
+Ipv4L4Demux::Ipv4L4Demux(Ipv4L4Demux const &o)
+{
+  for (L4List_t::const_iterator i = o.m_protocols.begin(); i != o.m_protocols.end(); ++i)
+    {
+      Insert(*(*i));
+    }
+}
+Ipv4L4Demux::~Ipv4L4Demux()
+{}
+Ipv4L4Demux* 
+Ipv4L4Demux::Copy() const
+{
+  return new Ipv4L4Demux(*this);
+}
+Ipv4L4Protocol* 
+Ipv4L4Demux::Insert(const Ipv4L4Protocol&protocol)
+{
+  Ipv4L4Protocol* copy = protocol.Copy(); // Make a copy of the protocol
+  m_protocols.push_back (copy);
+  return copy;
+}
+Ipv4L4Protocol* 
+Ipv4L4Demux::Lookup(int protocolNumber)
+{
+  for (L4List_t::iterator i = m_protocols.begin(); i != m_protocols.end(); ++i)
+    {
+      if ((*i)->GetProtocolNumber () == protocolNumber)
+	{
+	  return *i;
+	}
+    }
+  return 0;
+}
+void
+Ipv4L4Demux::Erase(Ipv4L4Protocol*protocol)
+{
+  m_protocols.remove (protocol);
+}
+
+
+
+}//namespace ns3