Serious refactoring. Making forwarding strategy really modular
diff --git a/model/forwarding-strategy/nacks.h b/model/forwarding-strategy/nacks.h
new file mode 100644
index 0000000..fbcec9f
--- /dev/null
+++ b/model/forwarding-strategy/nacks.h
@@ -0,0 +1,97 @@
+/* -*- 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 NDNSIM_NACKS_H
+#define NDNSIM_NACKS_H
+
+#include "ns3/ccnx-forwarding-strategy.h"
+
+namespace ns3 {
+
+namespace ndnSIM {
+
+/**
+ * \ingroup ccnx
+ * \brief Abstract base class for CCNx forwarding strategies
+ */
+class Nacks :
+ public CcnxForwardingStrategy
+{
+public:
+ static TypeId
+ GetTypeId (void);
+
+ /**
+ * \brief Actual processing of incoming CCNx interests. Note, interests do not have payload
+ *
+ * Processing Interest packets
+ * @param face incoming face
+ * @param header deserialized Interest header
+ * @param packet original packet
+ */
+ virtual void
+ OnInterest (const Ptr<CcnxFace> &face,
+ Ptr<CcnxInterestHeader> &header,
+ const Ptr<const Packet> &p);
+
+protected:
+ // using CcnxForwardingStrategy::PropagateInterest; // some strange c++ cheating
+
+ virtual void
+ DidReceiveDuplicateInterest (const Ptr<CcnxFace> &face,
+ Ptr<CcnxInterestHeader> &header,
+ const Ptr<const Packet> &packet,
+ Ptr<CcnxPitEntry> pitEntry);
+
+ virtual void
+ DidExhaustForwardingOptions (const Ptr<CcnxFace> &incomingFace,
+ Ptr<CcnxInterestHeader> header,
+ const Ptr<const Packet> &packet,
+ Ptr<CcnxPitEntry> pitEntry);
+
+ virtual void
+ OnNack (const Ptr<CcnxFace> &face,
+ Ptr<CcnxInterestHeader> &header,
+ const Ptr<const Packet> &p);
+
+ // virtual void
+ // OnDataDelayed (Ptr<const CcnxContentObjectHeader> header,
+ // Ptr<const Packet> payload,
+ // const Ptr<const Packet> &packet);
+
+protected:
+ bool m_nacksEnabled;
+
+ TracedCallback<Ptr<const CcnxInterestHeader>,
+ Ptr<const CcnxFace> > m_outNacks; ///< @brief trace of outgoing NACKs
+
+ TracedCallback<Ptr<const CcnxInterestHeader>,
+ Ptr<const CcnxFace> > m_inNacks; ///< @brief trace of incoming NACKs
+
+ TracedCallback<Ptr<const CcnxInterestHeader>,
+ Ptr<const CcnxFace> > m_dropNacks; ///< @brief trace of dropped NACKs
+
+private:
+ typedef CcnxForwardingStrategy super;
+};
+
+} // namespace ndnSIM
+} // namespace ns3
+
+#endif // NDNSIM_NACKS