--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/internet-node/l3-demux.h	Fri May 04 15:04:07 2007 +0200
@@ -0,0 +1,99 @@
+// -*- 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 L3Protocols capability for ns3.
+// George F. Riley, Georgia Tech, Fall 2006
+
+// This object manages the different layer 3 protocols for any ns3
+// node that has this capability.  
+
+#ifndef L3_DEMUX_H
+#define L3_DEMUX_H
+
+#include <map>
+#include "ns3/ns-unknown.h"
+
+namespace ns3 {
+
+class L3Protocol;
+class Node;
+class TraceResolver;
+class TraceContext;
+
+/**
+ * \brief L3 Demux 
+ */
+class L3Demux : public NsUnknown
+{
+public:
+  static const uint32_t iid;
+  typedef int ProtocolTraceType;
+  L3Demux(Node *node);
+  virtual ~L3Demux();
+
+  /**
+   * \param context the trace context to use to construct the
+   *        TraceResolver to return
+   * \returns a TraceResolver which can resolve all traces
+   *          performed in this object. The caller must
+   *          delete the returned object.
+   */
+  TraceResolver *CreateTraceResolver (TraceContext const &context) const;
+
+
+  /**
+   * \param protocol a template for the protocol to add to this L3 Demux.
+   *
+   * Invoke Copy on the input template to get a copy of the input
+   * protocol which can be used on the Node on which this L3 Demux 
+   * is running. The new L3Protocol is registered internally as
+   * a working L3 Protocol and returned from this method.
+   * The caller does not get ownership of the returned pointer.
+   */
+  void Insert(ns3::L3Protocol * protocol);
+  /**
+   * \param protocolNumber number of protocol to lookup
+   *        in this L4 Demux
+   * \returns a matching L3 Protocol
+   *
+   * This method is typically called by lower layers
+   * to forward packets up the stack to the right protocol.
+   * It is also called from InternetNode::GetIpv4 for example.
+   */
+  ns3::L3Protocol* PeekProtocol (int protocolNumber);
+  /**
+   * \param protocol protocol to remove from this demux.
+   *
+   * The input value to this method should be the value
+   * returned from the L3Protocol::Insert method.
+   */
+  void Erase(ns3::L3Protocol*protocol);
+protected:
+  virtual void DoDispose (void);
+private:
+  typedef std::map<int, ns3::L3Protocol*> L3Map_t;
+
+  Node *m_node;
+  L3Map_t m_protocols;
+};
+
+} //namespace ns3
+#endif
+