First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/model/ndn-net-device-face.h b/model/ndn-net-device-face.h
new file mode 100644
index 0000000..bc132f7
--- /dev/null
+++ b/model/ndn-net-device-face.h
@@ -0,0 +1,104 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef NDN_NET_DEVICE_FACE_H
+#define NDN_NET_DEVICE_FACE_H
+
+#include "ndn-face.h"
+#include "ns3/net-device.h"
+
+namespace ns3 {
+
+class Address;
+  
+/**
+ * \ingroup ndn-face
+ * \brief Implementation of layer-2 (Ethernet) Ndn face
+ *
+ * This class defines basic functionality of Ndn face. Face is core
+ * component responsible for actual delivery of data packet to and
+ * from Ndn stack
+ *
+ * NdnNetDevice face is permanently associated with one NetDevice
+ * object and this object cannot be changed for the lifetime of the
+ * face
+ *
+ * \see NdnAppFace, NdnNetDeviceFace, NdnIpv4Face, NdnUdpFace
+ */
+class NdnNetDeviceFace  : public NdnFace
+{
+public:
+  static TypeId
+  GetTypeId ();
+
+  /**
+   * \brief Constructor
+   *
+   * @param node Node associated with the face
+   * @param netDevice a smart pointer to NetDevice object to which
+   * this face will be associate
+   */
+  NdnNetDeviceFace (Ptr<Node> node, const Ptr<NetDevice> &netDevice);
+  virtual ~NdnNetDeviceFace();
+
+  ////////////////////////////////////////////////////////////////////
+  // methods overloaded from NdnFace
+  virtual void
+  RegisterProtocolHandler (ProtocolHandler handler);
+  
+protected:
+  // also from NdnFace
+  virtual bool
+  SendImpl (Ptr<Packet> p);
+
+public:
+  /**
+   * @brief Print out name of the NdnFace to the stream
+   */
+  virtual std::ostream&
+  Print (std::ostream &os) const;
+  ////////////////////////////////////////////////////////////////////
+
+  /**
+   * \brief Get NetDevice associated with the face
+   *
+   * \returns smart pointer to NetDevice associated with the face
+   */
+  Ptr<NetDevice> GetNetDevice () const;
+
+private:
+  NdnNetDeviceFace (const NdnNetDeviceFace &); ///< \brief Disabled copy constructor
+  NdnNetDeviceFace& operator= (const NdnNetDeviceFace &); ///< \brief Disabled copy operator
+
+  /// \brief callback from lower layers
+  void ReceiveFromNetDevice (Ptr<NetDevice> device,
+                             Ptr<const Packet> p,
+                             uint16_t protocol,
+                             const Address &from,
+                             const Address &to,
+                             NetDevice::PacketType packetType);
+
+private:
+  Ptr<NetDevice> m_netDevice; ///< \brief Smart pointer to NetDevice
+};
+
+} // namespace ns3
+
+#endif //NDN_NET_DEVICE_FACE_H