implement ipv4 loopback for testing

src/node/ipv4-loopback-interface.h

@@ -0,0 +1,47 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 INRIA
+ * 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
+ *
+ * Authors: 
+ *  Mathieu Lacage <mathieu.lacage@sophia.inria.fr>,
+ */
+#ifndef IPV4_LOOPBACK_INTERFACE_H
+#define IPV4_LOOPBACK_INTERFACE_H
+
+#include "ipv4-interface.h"
+
+namespace ns3 {
+
+class Node;
+
+class Ipv4LoopbackInterface : public Ipv4Interface 
+{
+ public:
+  Ipv4LoopbackInterface (Node *node);
+  virtual ~Ipv4LoopbackInterface ();
+
+ private:
+  virtual void SendTo (Packet p, Ipv4Address dest);
+  Node *GetNode (void) const;
+
+  Node *m_node;
+};
+
+}//namespace ns3
+
+
+#endif /* IPV4_LOOPBACK_INTERFACE_H */