--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/internet-node/ipv4-l4-demux.cc	Fri May 04 15:04:07 2007 +0200
@@ -0,0 +1,106 @@
+// -*- 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 <sstream>
+#include "ns3/composite-trace-resolver.h"
+#include "ns3/iid-manager.h"
+#include "ns3/node.h"
+#include "ipv4-l4-demux.h"
+#include "ipv4-l4-protocol.h"
+
+namespace ns3 {
+
+const uint32_t Ipv4L4Demux::iid = IidManager::Allocate ("Ipv4L4Demux");
+
+Ipv4L4Demux::Ipv4L4Demux (Node *node)
+  : NsUnknown (Ipv4L4Demux::iid),
+    m_node (node)
+{
+  m_node->Ref ();
+}
+
+Ipv4L4Demux::~Ipv4L4Demux()
+{}
+
+void
+Ipv4L4Demux::DoDispose (void)
+{
+  for (L4List_t::const_iterator i = m_protocols.begin(); i != m_protocols.end(); ++i)
+    {
+      (*i)->Dispose ();
+      (*i)->Unref ();
+    }
+  m_protocols.clear ();
+  if (m_node != 0)
+    {
+      m_node->Unref ();
+      m_node = 0;
+    }
+  NsUnknown::DoDispose ();
+}
+
+TraceResolver *
+Ipv4L4Demux::CreateTraceResolver (TraceContext const &context)
+{
+  CompositeTraceResolver *resolver = new CompositeTraceResolver (context);
+  for (L4List_t::const_iterator i = m_protocols.begin(); i != m_protocols.end(); ++i)
+    {
+      Ipv4L4Protocol *protocol = *i;
+      std::string protValue;
+      std::ostringstream oss (protValue);
+      oss << (*i)->GetProtocolNumber ();
+      Ipv4L4ProtocolTraceType protocolNumber = (*i)->GetProtocolNumber ();
+      resolver->Add (protValue,
+                     MakeCallback (&Ipv4L4Protocol::CreateTraceResolver, protocol),
+                     protocolNumber);
+    }
+  return resolver;
+}
+void
+Ipv4L4Demux::Insert(Ipv4L4Protocol *protocol)
+{
+  protocol->Ref ();
+  m_protocols.push_back (protocol);
+}
+Ipv4L4Protocol* 
+Ipv4L4Demux::PeekProtocol(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