Separating interface and implementation of FIB. Right now everything is
kind of broken.
diff --git a/model/ccnx-fib-impl.h b/model/ccnx-fib-impl.h
new file mode 100644
index 0000000..b10d558
--- /dev/null
+++ b/model/ccnx-fib-impl.h
@@ -0,0 +1,166 @@
+/* -*- 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 _CCNX_FIB_IMPL_H_
+#define	_CCNX_FIB_IMPL_H_
+
+#include "ns3/ccnx-fib.h"
+#include "ns3/ccnx-name-components.h"
+
+#include "../utils/trie-with-policy.h"
+#include "../utils/empty-policy.h"
+
+namespace ns3 {
+
+struct CcnxFibEntryContainer
+{
+  typedef ndnSIM::trie_with_policy<
+    CcnxNameComponents,
+    ndnSIM::smart_pointer_payload_traits<CcnxFibEntry>,
+    ndnSIM::empty_policy_traits
+    > type;
+};
+
+/**
+ * \ingroup ccnx
+ * \brief Class implementing FIB functionality
+ */
+class CcnxFibImpl : public CcnxFib,
+                    private CcnxFibEntryContainer::type
+{
+public:
+  typedef CcnxFibEntryContainer::type super;
+  
+  /**
+   * \brief Interface ID
+   *
+   * \return interface ID
+   */
+  static TypeId GetTypeId ();
+
+  /**
+   * \brief Constructor
+   */
+  CcnxFibImpl ();
+
+  /**
+   * \brief Perform longest prefix match
+   *
+   * \todo Implement exclude filters
+   *
+   * \param interest Interest packet header
+   * \returns If entry found a valid iterator will be returned, otherwise end ()
+   */
+  CcnxFib::iterator
+  LongestPrefixMatch (const CcnxInterestHeader &interest) const;
+  
+  /**
+   * \brief Add or update FIB entry
+   *
+   * If the entry exists, metric will be updated. Otherwise, new entry will be created
+   *
+   * Entries in FIB never deleted. They can be invalidated with metric==NETWORK_UNREACHABLE
+   *
+   * @param name	Prefix
+   * @param face	Forwarding face
+   * @param metric	Routing metric
+   */
+  CcnxFib::iterator
+  Add (const CcnxNameComponents &prefix, Ptr<CcnxFace> face, int32_t metric);
+
+  /**
+   * \brief Add or update FIB entry using smart pointer to prefix
+   *
+   * If the entry exists, metric will be updated. Otherwise, new entry will be created
+   *
+   * Entries in FIB never deleted. They can be invalidated with metric==NETWORK_UNREACHABLE
+   *
+   * @param name	Smart pointer to prefix
+   * @param face	Forwarding face
+   * @param metric	Routing metric
+   */
+  CcnxFib::iterator
+  Add (const Ptr<const CcnxNameComponents> &prefix, Ptr<CcnxFace> face, int32_t metric);
+
+  /**
+   * @brief Remove FIB entry
+   *
+   * ! ATTENTION ! Use with caution.  All PIT entries referencing the corresponding FIB entry will become invalid.
+   * So, simulation may crash.
+   *
+   * @param name	Smart pointer to prefix
+   */
+  void
+  Remove (const Ptr<const CcnxNameComponents> &prefix);
+
+  /**
+   * @brief Invalidate FIB entry ("Safe" version of Remove)
+   *
+   * All faces for the entry will be assigned maximum routing metric and NDN_FIB_RED status   
+   * @param name	Smart pointer to prefix
+   */
+  void
+  Invalidate (const Ptr<const CcnxNameComponents> &prefix);
+
+  /**
+   * @brief Invalidate all FIB entries
+   */
+  void
+  InvalidateAll ();
+  
+  /**
+   * @brief Remove reference to a face from the entry. If entry had only this face, the whole
+   * entry will be removed
+   */
+  void
+  Remove (const CcnxFibEntry &entry, Ptr<CcnxFace> face);
+
+  /**
+   * @brief Remove all references to a face from FIB.  If for some enty that face was the only element,
+   * this FIB entry will be removed.
+   */
+  void
+  RemoveFromAll (Ptr<CcnxFace> face);
+
+  void
+  Print (std::ostream &os) const;
+  
+  /**
+   * @brief Modify element in container
+   */
+  template<typename Modifier>
+  bool
+  modify (CcnxFib::iterator position, Modifier mod)
+  {
+    return this->modify (position, mod);
+  }
+  
+protected:
+  // inherited from Object class
+  virtual void NotifyNewAggregate (); ///< @brief Notify when object is aggregated
+  virtual void DoDispose (); ///< @brief Perform cleanup
+  
+private:
+  Ptr<Node> m_node;
+};
+ 
+} // namespace ns3
+
+#endif	/* _CCNX_FIB_IMPL_H_ */