--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/node/ipv4.h	Sat Feb 10 11:29:44 2007 +0100
@@ -0,0 +1,130 @@
+// -*- 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>
+//
+
+#ifndef IPV4_H
+#define IPV4_H
+
+#include <list>
+#include <stdint.h>
+#include "l3-protocol.h"
+#include "ipv4-address.h"
+
+namespace ns3 {
+
+class Packet;
+class NetDevice;
+class Ipv4Interface;
+class Ipv4Address;
+class Ipv4Header;
+class Ipv4Route;
+class Node;
+
+
+/**
+ * ::Send is always defined in subclasses.
+ */
+class Ipv4 : public L3Protocol {
+public:
+  Ipv4();
+  Ipv4(Ipv4 const &o);
+  virtual ~Ipv4 ();
+
+  void SetDefaultTtl (uint8_t ttl);
+    
+  /* add route to host dest through host nextHop 
+   * on interface.
+   */
+  void AddHostRouteTo (Ipv4Address dest, 
+                       Ipv4Address nextHop, 
+                       uint32_t interface);
+  /* add route to host dest on interface.
+   */
+  void AddHostRouteTo (Ipv4Address dest, 
+                       uint32_t interface);
+  /* add route to network dest with netmask 
+   * through host nextHop on interface
+   */
+  void AddNetworkRouteTo (Ipv4Address network, 
+                          Ipv4Mask networkMask, 
+                          Ipv4Address nextHop, 
+                          uint32_t interface);
+  /* add route to network dest with netmask 
+   * on interface
+   */
+  void AddNetworkRouteTo (Ipv4Address network, 
+                          Ipv4Mask networkMask, 
+                          uint32_t interface);
+  /* set the default route to host nextHop on
+   * interface. 
+   */
+  void SetDefaultRoute (Ipv4Address nextHop, 
+                        uint32_t interface);
+
+  Ipv4Route *Lookup (Ipv4Address dest);
+
+  uint32_t GetNRoutes (void);
+  Ipv4Route *GetRoute (uint32_t i);
+  void RemoveRoute (uint32_t i);
+  
+  uint32_t AddInterface (Ipv4Interface *interface);
+  Ipv4Interface * GetInterface (uint32_t i);
+  uint32_t GetNInterfaces (void) const;
+  
+
+  virtual Ipv4* Copy() const;
+  /**
+   * Lower layer calls this method after calling L3Demux::Lookup
+   * The ARP subclass needs to know from which NetDevice this
+   * packet is coming to:
+   *    - implement a per-NetDevice ARP cache
+   *    - send back arp replies on the right device
+   */
+  virtual void Receive(Packet& p, NetDevice &device);
+
+  void Send (Packet const &packet, Ipv4Address source, 
+	     Ipv4Address destination, uint8_t protocol);
+
+ private:
+  void SendRealOut (Packet const &packet, Ipv4Header const &ip, Ipv4Route const &route);
+  bool Forwarding (Packet const &packet, Ipv4Header &ipHeader, NetDevice &device);
+  void ForwardUp (Packet p, Ipv4Header const&ip);
+
+  typedef std::list<Ipv4Interface*> Ipv4InterfaceList;
+  typedef std::list<Ipv4Route *> HostRoutes;
+  typedef std::list<Ipv4Route *>::const_iterator HostRoutesCI;
+  typedef std::list<Ipv4Route *>::iterator HostRoutesI;
+  typedef std::list<Ipv4Route *> NetworkRoutes;
+  typedef std::list<Ipv4Route *>::const_iterator NetworkRoutesCI;
+  typedef std::list<Ipv4Route *>::iterator NetworkRoutesI;
+
+  Ipv4InterfaceList m_interfaces;
+  uint32_t m_nInterfaces;
+  uint8_t m_defaultTtl;
+  uint16_t m_identification;
+  HostRoutes m_hostRoutes;
+  NetworkRoutes m_networkRoutes;
+  Ipv4Route *m_defaultRoute;
+  Node *m_node;
+};
+
+} // Namespace ns3
+
+#endif