First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/model/pit/ndn-pit-entry-incoming-face.h b/model/pit/ndn-pit-entry-incoming-face.h
new file mode 100644
index 0000000..947271b
--- /dev/null
+++ b/model/pit/ndn-pit-entry-incoming-face.h
@@ -0,0 +1,79 @@
+/* -*- 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
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef _NDN_PIT_ENTRY_INCOMING_FACE_H_
+#define _NDN_PIT_ENTRY_INCOMING_FACE_H_
+
+#include "ns3/nstime.h"
+#include "ns3/ptr.h"
+
+#include "ns3/ndn-face.h"
+// #include <iostream>
+
+namespace ns3 {
+
+/**
+ * \ingroup ndn
+ * \brief PIT state component for each incoming interest (not including duplicates)
+ */
+struct NdnPitEntryIncomingFace
+{
+ Ptr<NdnFace> m_face; ///< \brief face of the incoming Interest
+ Time m_arrivalTime; ///< \brief arrival time of the incoming Interest
+
+public:
+ /**
+ * \brief Constructor
+ * \param face face of the incoming interest
+ * \param lifetime lifetime of the incoming interest
+ */
+ NdnPitEntryIncomingFace (Ptr<NdnFace> face);
+
+ /**
+ * @brief Default constructor, necessary for Python bindings, but should not be used anywhere else.
+ */
+ NdnPitEntryIncomingFace ();
+ /**
+ * @brie Copy operator
+ */
+ NdnPitEntryIncomingFace &
+ operator = (NdnPitEntryIncomingFace &other);
+
+ /**
+ * @brief Compare two NdnPitEntryIncomingFace
+ */
+ bool operator== (const NdnPitEntryIncomingFace &dst) { return *m_face==*(dst.m_face); }
+
+ /**
+ * @brief Compare NdnPitEntryIncomingFace with NdnFace
+ */
+ bool operator== (Ptr<NdnFace> face) { return *m_face==*face; }
+
+ /**
+ * \brief Comparison operator used by boost::multi_index::identity<>
+ */
+ bool
+ operator< (const NdnPitEntryIncomingFace &m) const { return *m_face < *(m.m_face); } // return identity of the face
+};
+
+
+} // namespace ns3
+
+#endif /* NDN_PIT_ENTRY_INCOMING_FACE_H */