fw: Best Route Strategy version 2
refs #1871
Change-Id: I196a5ff0839f72caf9210af61ad54066242ba9c2
diff --git a/daemon/fw/best-route-strategy2.hpp b/daemon/fw/best-route-strategy2.hpp
new file mode 100644
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+++ b/daemon/fw/best-route-strategy2.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, 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_BEST_ROUTE_STRATEGY2_HPP
+#define NFD_DAEMON_FW_BEST_ROUTE_STRATEGY2_HPP
+
+#include "strategy.hpp"
+
+namespace nfd {
+namespace fw {
+
+/** \brief Best Route strategy version 2
+ *
+ * This strategy forwards a new Interest to the lowest-cost nexthop (except downstream).
+ * After that, it recognizes consumer retransmission:
+ * if a similar Interest arrives from any downstream after MIN_RETRANSMISSION_INTERVAL,
+ * the strategy forwards the Interest again to the lowest-cost nexthop (except downstream)
+ * that is not previously used. If all nexthops have been used, the strategy starts over.
+ */
+class BestRouteStrategy2 : public Strategy
+{
+public:
+ BestRouteStrategy2(Forwarder& forwarder, const Name& name = STRATEGY_NAME);
+
+ virtual void
+ afterReceiveInterest(const Face& inFace,
+ const Interest& interest,
+ shared_ptr<fib::Entry> fibEntry,
+ shared_ptr<pit::Entry> pitEntry);
+
+public:
+ static const Name STRATEGY_NAME;
+ static const time::milliseconds MIN_RETRANSMISSION_INTERVAL;
+};
+
+} // namespace fw
+} // namespace nfd
+
+#endif // NFD_DAEMON_FW_BEST_ROUTE_STRATEGY2_HPP