fw: Adaptive SRTT-based Forwarding strategy
refs: #3566
Change-Id: Idae198bb0c2ae25e25aeceec0552b1c11be89c14
diff --git a/daemon/fw/asf-strategy.hpp b/daemon/fw/asf-strategy.hpp
new file mode 100644
index 0000000..1e028cc
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+++ b/daemon/fw/asf-strategy.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2016, Regents of the University of California,
+ * Arizona Board of Regents,
+ * Colorado State University,
+ * University Pierre & Marie Curie, Sorbonne University,
+ * Washington University in St. Louis,
+ * Beijing Institute of Technology,
+ * The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD 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
+ * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_DAEMON_FW_ASF_STRATEGY_HPP
+#define NFD_DAEMON_FW_ASF_STRATEGY_HPP
+
+#include "asf-measurements.hpp"
+#include "asf-probing-module.hpp"
+#include "fw/retx-suppression-exponential.hpp"
+#include "fw/strategy.hpp"
+
+namespace nfd {
+namespace fw {
+namespace asf {
+
+/** \brief Adaptive SRTT-based Forwarding Strategy
+ *
+ * \see Vince Lehman, Ashlesh Gawande, Rodrigo Aldecoa, Dmitri Krioukov, Beichuan Zhang, Lixia Zhang, and Lan Wang,
+ * "An Experimental Investigation of Hyperbolic Routing with a Smart Forwarding Plane in NDN,"
+ * NDN Technical Report NDN-0042, 2016. http://named-data.net/techreports.html
+ */
+class AsfStrategy : public Strategy
+{
+public:
+ explicit
+ AsfStrategy(Forwarder& forwarder, const Name& name = STRATEGY_NAME);
+
+ virtual
+ ~AsfStrategy();
+
+public: // triggers
+ virtual void
+ afterReceiveInterest(const Face& inFace,
+ const Interest& interest,
+ shared_ptr<fib::Entry> fibEntry,
+ shared_ptr<pit::Entry> pitEntry) override;
+
+ virtual void
+ beforeSatisfyInterest(shared_ptr<pit::Entry> pitEntry,
+ const Face& inFace, const Data& data) override;
+
+ virtual void
+ afterReceiveNack(const Face& inFace, const lp::Nack& nack,
+ shared_ptr<fib::Entry> fibEntry,
+ shared_ptr<pit::Entry> pitEntry) override;
+
+private:
+ void
+ forwardInterest(const Interest& interest,
+ const fib::Entry& fibEntry,
+ shared_ptr<pit::Entry> pitEntry,
+ shared_ptr<Face> outFace,
+ bool wantNewNonce = false);
+
+ const shared_ptr<Face>
+ getBestFaceForForwarding(const fib::Entry& fibEntry, const ndn::Interest& interest, const Face& inFace);
+
+ void
+ onTimeout(const ndn::Name& interestName, nfd::face::FaceId faceId);
+
+ void
+ sendNoRouteNack(const Face& inFace, const Interest& interest, shared_ptr<pit::Entry> pitEntry);
+
+public:
+ static const Name STRATEGY_NAME;
+
+private:
+ AsfMeasurements m_measurements;
+ ProbingModule m_probing;
+
+private:
+ RetxSuppressionExponential m_retxSuppression;
+
+ static const time::milliseconds RETX_SUPPRESSION_INITIAL;
+ static const time::milliseconds RETX_SUPPRESSION_MAX;
+};
+
+} // namespace asf
+
+using asf::AsfStrategy;
+
+} // namespace fw
+} // namespace nfd
+
+#endif // NFD_DAEMON_FW_ASF_STRATEGY_HPP