fw: Add Random Forwarding Strategy
Implement a forwarding strategy that chooses a random outgoing face,
excluding the incoming face of an Interest packet.
Refs: #4992
Change-Id: I056cd0f05463f5f0742c6adcb32ec1df8ef7529b
diff --git a/tests/daemon/fw/random-strategy.t.cpp b/tests/daemon/fw/random-strategy.t.cpp
new file mode 100644
index 0000000..de62113
--- /dev/null
+++ b/tests/daemon/fw/random-strategy.t.cpp
@@ -0,0 +1,107 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2019, 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/>.
+ */
+
+#include "fw/random-strategy.hpp"
+#include "common/global.hpp"
+
+#include "tests/test-common.hpp"
+#include "tests/daemon/face/dummy-face.hpp"
+#include "strategy-tester.hpp"
+
+namespace nfd {
+namespace fw {
+namespace tests {
+
+using RandomStrategyTester = StrategyTester<RandomStrategy>;
+NFD_REGISTER_STRATEGY(RandomStrategyTester);
+
+BOOST_AUTO_TEST_SUITE(Fw)
+
+class RandomStrategyFixture : public GlobalIoTimeFixture
+{
+protected:
+ RandomStrategyFixture()
+ : strategy(forwarder)
+ , fib(forwarder.getFib())
+ , pit(forwarder.getPit())
+ , face1(make_shared<DummyFace>())
+ , face2(make_shared<DummyFace>())
+ , face3(make_shared<DummyFace>())
+ , face4(make_shared<DummyFace>())
+ {
+ forwarder.addFace(face1);
+ forwarder.addFace(face2);
+ forwarder.addFace(face3);
+ forwarder.addFace(face4);
+ }
+
+public:
+ Forwarder forwarder;
+ RandomStrategyTester strategy;
+ Fib& fib;
+ Pit& pit;
+
+ shared_ptr<DummyFace> face1;
+ shared_ptr<DummyFace> face2;
+ shared_ptr<DummyFace> face3;
+ shared_ptr<DummyFace> face4;
+};
+
+BOOST_FIXTURE_TEST_SUITE(TestRandomStrategy, RandomStrategyFixture)
+
+BOOST_AUTO_TEST_CASE(Forward)
+{
+ fib::Entry& fibEntry = *fib.insert(Name()).first;
+ fib.addOrUpdateNextHop(fibEntry, *face2, 10);
+ fib.addOrUpdateNextHop(fibEntry, *face3, 20);
+ fib.addOrUpdateNextHop(fibEntry, *face4, 30);
+
+ // Send 1000 Interests
+ for (int i = 0; i < 1000; ++i) {
+ shared_ptr<Interest> interest = makeInterest("ndn:/BzgFBchqA" + std::to_string(i));
+ shared_ptr<pit::Entry> pitEntry = pit.insert(*interest).first;
+
+ pitEntry->insertOrUpdateInRecord(*face1, 0, *interest);
+ strategy.afterReceiveInterest(FaceEndpoint(*face1, 0), *interest, pitEntry);
+ }
+
+ // Map outFaceId -> SentInterests.
+ std::unordered_map<int, int> faceInterestMap;
+ for (const auto& i : strategy.sendInterestHistory) {
+ faceInterestMap[i.outFaceId]++;
+ }
+
+ // Check that all faces received at least 10 Interest
+ for (const auto& x : faceInterestMap) {
+ BOOST_CHECK_GE(x.second, 10);
+ }
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestRandomStrategy
+BOOST_AUTO_TEST_SUITE_END() // Fw
+
+} // namespace tests
+} // namespace fw
+} // namespace nfd