--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/internet-stack/ipv4-loopback-interface.cc	Mon Jun 09 15:40:22 2008 -0700
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 INRIA
+ *
+ * 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>,
+ */
+
+#include "ns3/log.h"
+#include "ns3/net-device.h"
+#include "ns3/node.h"
+#include "ns3/mac48-address.h"
+#include "ns3/packet.h"
+#include "ipv4-loopback-interface.h"
+#include "ipv4-l3-protocol.h"
+
+NS_LOG_COMPONENT_DEFINE ("Ipv4LoopbackInterface");
+
+namespace ns3 {
+
+TypeId 
+Ipv4LoopbackInterface::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::Ipv4LoopbackInterface")
+    .SetParent<Ipv4Interface> ()
+    ;
+  return tid;
+}
+
+Ipv4LoopbackInterface::Ipv4LoopbackInterface ()
+  : m_node (0)
+{
+  NS_LOG_FUNCTION (this);
+}
+
+Ipv4LoopbackInterface::~Ipv4LoopbackInterface ()
+{
+  NS_LOG_FUNCTION (this);
+  NS_ASSERT (m_node != 0);
+}
+
+Ptr<NetDevice> 
+Ipv4LoopbackInterface::GetDevice (void) const
+{
+  return 0;
+}
+
+void 
+Ipv4LoopbackInterface::SetNode (Ptr<Node> node)
+{
+  m_node = node;
+}
+
+void 
+Ipv4LoopbackInterface::SendTo (Ptr<Packet> packet, Ipv4Address dest)
+{
+  NS_LOG_FUNCTION (this << packet << dest);
+
+  Ptr<Ipv4L3Protocol> ipv4 = 
+    m_node->GetObject<Ipv4L3Protocol> ();
+
+  ipv4->Receive (0, packet, Ipv4L3Protocol::PROT_NUMBER, 
+                 Mac48Address ("ff:ff:ff:ff:ff:ff"));
+}
+
+}//namespace ns3