tests/route/test-fib.cpp - NLSR - Gitiles

 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
  * Copyright (c) 2014-2023,  The University of Memphis,
  *                           Regents of the University of California
  *
  * This file is part of NLSR (Named-data Link State Routing).
  * See AUTHORS.md for complete list of NLSR authors and contributors.
  *
  * NLSR 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.
  *
  * NLSR 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
  * NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
  */

 #include "route/fib.hpp"
 #include "adjacency-list.hpp"
 #include "conf-parameter.hpp"

 #include "tests/boost-test.hpp"
 #include "tests/io-key-chain-fixture.hpp"

 #include <ndn-cxx/mgmt/nfd/control-parameters.hpp>
 #include <ndn-cxx/util/dummy-client-face.hpp>

 namespace nlsr {
 namespace test {

 class FibFixture : public IoKeyChainFixture
 {
 public:
   FibFixture()
     : adjacencies(conf.getAdjacencyList())
     , fib(face, m_scheduler, adjacencies, conf, m_keyChain)
     , interests(face.sentInterests)
   {
     advanceClocks(1_s);

     Adjacent neighbor1(router1Name, ndn::FaceUri(router1FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router1FaceId);
     adjacencies.insert(neighbor1);

     Adjacent neighbor2(router2Name, ndn::FaceUri(router2FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router2FaceId);
     adjacencies.insert(neighbor2);

     Adjacent neighbor3(router3Name, ndn::FaceUri(router3FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router3FaceId);
     adjacencies.insert(neighbor3);

     conf.setMaxFacesPerPrefix(2);

     fib.setEntryRefreshTime(1);
   }

   static void
   extractRibCommandParameters(const ndn::Interest& interest,
                               ndn::Name::Component& verb,
                               ndn::nfd::ControlParameters& params)
   {
     const auto& name = interest.getName();
     verb = name.at(RIB_COMMAND_PREFIX.size());
     params.wireDecode(name.at(RIB_COMMAND_PREFIX.size() + 1).blockFromValue());
   }

 private:
   static inline const ndn::Name RIB_COMMAND_PREFIX{"/localhost/nfd/rib"};

   ndn::Scheduler m_scheduler{m_io};

 public:
   ndn::util::DummyClientFace face{m_io, m_keyChain, [] {
     ndn::util::DummyClientFace::Options opts;
     opts.enableRegistrationReply = true;
     opts.registrationReplyFaceId = 128;
     return opts;
   } ()};
   ConfParameter conf{face, m_keyChain};
   AdjacencyList& adjacencies;
   Fib fib;
   std::vector<ndn::Interest>& interests;

   static const ndn::Name router1Name;
   static const ndn::Name router2Name;
   static const ndn::Name router3Name;

   static const std::string router1FaceUri;
   static const std::string router2FaceUri;
   static const std::string router3FaceUri;

   static const uint32_t router1FaceId;
   static const uint32_t router2FaceId;
   static const uint32_t router3FaceId;
 };

 const ndn::Name FibFixture::router1Name = "/ndn/router1";
 const ndn::Name FibFixture::router2Name = "/ndn/router2";
 const ndn::Name FibFixture::router3Name = "/ndn/router3";

 const std::string FibFixture::router1FaceUri = "udp4://10.0.0.1";
 const std::string FibFixture::router2FaceUri = "udp4://10.0.0.2";
 const std::string FibFixture::router3FaceUri = "udp4://10.0.0.3";

 const uint32_t FibFixture::router1FaceId = 1;
 const uint32_t FibFixture::router2FaceId = 2;
 const uint32_t FibFixture::router3FaceId = 3;

 BOOST_FIXTURE_TEST_SUITE(TestFib, FibFixture)

 BOOST_AUTO_TEST_CASE(NextHopsAdd)
 {
   NextHop hop1(router1FaceUri, 10);
   NextHop hop2(router2FaceUri, 20);

   NexthopList hops;
   hops.addNextHop(hop1);
   hops.addNextHop(hop2);

   fib.update("/ndn/name", hops);
   face.processEvents(ndn::time::milliseconds(-1));

   // Should register faces 1 and 2 for /ndn/name
   BOOST_REQUIRE_EQUAL(interests.size(), 2);

   ndn::nfd::ControlParameters extractedParameters;
   ndn::Name::Component verb;
   std::vector<ndn::Interest>::iterator it = interests.begin();

   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router1FaceId &&
               verb == ndn::Name::Component("register"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router2FaceId &&
               verb == ndn::Name::Component("register"));
 }

 BOOST_AUTO_TEST_CASE(NextHopsNoChange)
 {
   NextHop hop1(router1FaceUri, 10);
   NextHop hop2(router2FaceUri, 20);

   NexthopList oldHops;
   oldHops.addNextHop(hop1);
   oldHops.addNextHop(hop2);

   fib.update("/ndn/name", oldHops);
   face.processEvents(ndn::time::milliseconds(-1));

   BOOST_REQUIRE_EQUAL(interests.size(), 2);
   interests.clear();

   fib.update("/ndn/name", oldHops);
   face.processEvents(ndn::time::milliseconds(-1));

   // Should register face 1 and 2 for /ndn/name
   BOOST_REQUIRE_EQUAL(interests.size(), 2);

   ndn::nfd::ControlParameters extractedParameters;
   ndn::Name::Component verb;
   std::vector<ndn::Interest>::iterator it = interests.begin();

   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router1FaceId &&
               verb == ndn::Name::Component("register"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router2FaceId &&
               verb == ndn::Name::Component("register"));
 }

 BOOST_AUTO_TEST_CASE(NextHopsRemoveAll)
 {
   NextHop hop1(router1FaceUri, 10);
   NextHop hop2(router2FaceUri, 20);

   NexthopList oldHops;
   oldHops.addNextHop(hop1);
   oldHops.addNextHop(hop2);

   fib.update("/ndn/name", oldHops);
   face.processEvents(ndn::time::milliseconds(-1));

   BOOST_REQUIRE_EQUAL(interests.size(), 2);
   interests.clear();

   NexthopList empty;

   fib.update("/ndn/name", empty);
   face.processEvents(ndn::time::milliseconds(-1));

   // Should unregister faces 1 and 2 for /ndn/name
   BOOST_CHECK_EQUAL(interests.size(), 2);

   ndn::nfd::ControlParameters extractedParameters;
   ndn::Name::Component verb;
   std::vector<ndn::Interest>::iterator it = interests.begin();

   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router1FaceId &&
               verb == ndn::Name::Component("unregister"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router2FaceId &&
               verb == ndn::Name::Component("unregister"));
 }

 BOOST_AUTO_TEST_CASE(NextHopsMaxPrefixes)
 {
   NextHop hop1(router1FaceUri, 10);
   NextHop hop2(router2FaceUri, 20);
   NextHop hop3(router3FaceUri, 30);

   NexthopList hops;
   hops.addNextHop(hop1);
   hops.addNextHop(hop2);
   hops.addNextHop(hop3);

   fib.update("/ndn/name", hops);
   face.processEvents(ndn::time::milliseconds(-1));

   // Should only register faces 1 and 2 for /ndn/name
   BOOST_CHECK_EQUAL(interests.size(), 2);

   ndn::nfd::ControlParameters extractedParameters;
   ndn::Name::Component verb;
   std::vector<ndn::Interest>::iterator it = interests.begin();

   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router1FaceId &&
               verb == ndn::Name::Component("register"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router2FaceId &&
               verb == ndn::Name::Component("register"));
 }

 BOOST_AUTO_TEST_CASE(NextHopsMaxPrefixesAfterRecalculation)
 {
   NextHop hop1(router1FaceUri, 10);
   NextHop hop2(router2FaceUri, 20);

   NexthopList hops;
   hops.addNextHop(hop1);
   hops.addNextHop(hop2);

   fib.update("/ndn/name", hops);
   face.processEvents(ndn::time::milliseconds(-1));

   // FIB
   // Name        NextHops
   // /ndn/name   (faceId=1, cost=10), (faceId=2, cost=20)
   BOOST_REQUIRE_EQUAL(interests.size(), 2);
   interests.clear();

   // Routing table is recalculated; a new more optimal path is found
   NextHop hop3(router3FaceUri, 5);
   hops.addNextHop(hop3);

   fib.update("/ndn/name", hops);
   face.processEvents(ndn::time::milliseconds(-1));

   // To maintain a max 2 face requirement, face 3 should be registered and face 2 should be
   // unregistered. Face 1 will also be re-registered.
   //
   // FIB
   // Name         NextHops
   // /ndn/name    (faceId=3, cost=5), (faceId=1, cost=10)

   BOOST_CHECK_EQUAL(interests.size(), 3);

   ndn::nfd::ControlParameters extractedParameters;
   ndn::Name::Component verb;
   std::vector<ndn::Interest>::iterator it = interests.begin();

   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router1FaceId &&
               verb == ndn::Name::Component("register"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router3FaceId &&
               verb == ndn::Name::Component("register"));

   ++it;
   extractRibCommandParameters(*it, verb, extractedParameters);

   BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
               extractedParameters.getFaceId() == router2FaceId &&
               verb == ndn::Name::Component("unregister"));
 }

 BOOST_FIXTURE_TEST_CASE(ScheduleFibEntryRefresh, FibFixture)
 {
   ndn::Name name1("/name/1");
   FibEntry fe;
   fe.name = name1;
   int origSeqNo = fe.seqNo;
   fib.m_table.emplace(name1, std::move(fe));

   fib.scheduleEntryRefresh(fe, [&] (auto& entry) { BOOST_CHECK_EQUAL(origSeqNo + 1, entry.seqNo); });
   this->advanceClocks(ndn::time::milliseconds(10), 1);

   // avoid "test case [...] did not check any assertions" message from Boost.Test
   BOOST_CHECK(true);
 }

 BOOST_AUTO_TEST_CASE(ShouldNotRefreshNeighborRoute) // #4799
 {
   NextHop hop1;
   hop1.setConnectingFaceUri(router1FaceUri);

   NexthopList hops;
   hops.addNextHop(hop1);

   // Simulate update for this neighbor from name prefix table
   fib.update(router1Name, hops);
   this->advanceClocks(ndn::time::seconds(1));

   // Should not send the register interest
   BOOST_CHECK_EQUAL(face.sentInterests.size(), 0);
 }

 BOOST_AUTO_TEST_CASE(PrefixWithdrawalFibUpdateBug) // #5179
 {
   fib.setEntryRefreshTime(3600);
   conf.setMaxFacesPerPrefix(3);

   // Three adjacencies of Neu
   Adjacent neighbor1("/ndn/memphis/router-memphis",
                      ndn::FaceUri("udp4://10.0.0.9:6363"), 21, Adjacent::STATUS_ACTIVE, 0, router1FaceId);
   adjacencies.insert(neighbor1);

   Adjacent neighbor2("/ndn/michigan/router-michigan",
                      ndn::FaceUri("udp4://10.0.0.13:6363"), 14, Adjacent::STATUS_ACTIVE, 0, router2FaceId);
   adjacencies.insert(neighbor2);

   Adjacent neighbor3("/ndn/savi/router-savi",
                      ndn::FaceUri("udp4://10.0.0.26:6363"), 15, Adjacent::STATUS_ACTIVE, 0, router3FaceId);
   adjacencies.insert(neighbor3);

   // Wustl advertises /test
   NexthopList nhl1;
   nhl1.addNextHop(NextHop("udp4://10.0.0.13:6363", 28));
   nhl1.addNextHop(NextHop("udp4://10.0.0.9:6363", 38));
   nhl1.addNextHop(NextHop("udp4://10.0.0.26:6363", 44));
   fib.update("/test", nhl1);

   // Memphis advertises /test
   NexthopList nhl2;
   nhl2.addNextHop(NextHop("udp4://10.0.0.9:6363", 21));
   nhl2.addNextHop(NextHop("udp4://10.0.0.13:6363", 26));
   nhl2.addNextHop(NextHop("udp4://10.0.0.26:6363", 42));
   fib.update("/test", nhl2);

   advanceClocks(10_ms);
   face.sentInterests.clear();
   // Memphis withdraws /test
   // NamePrefixTable calls this saying we need to install the Wu routes
   // instead of the existing Memphis' cheaper routes
   fib.update("/test", nhl1);

   advanceClocks(10_ms);
   int numRegister = 0;
   // Do not expect any unregisters, just registers which will update the cost in NFD
   for (const auto& i : face.sentInterests) {
     if (i.getName().getPrefix(4) == "/localhost/nfd/rib/unregister") {
       BOOST_CHECK(false);
     }
     else {
       ++numRegister;
     }
   }
   BOOST_CHECK_EQUAL(numRegister, 3);
 }

 BOOST_AUTO_TEST_SUITE_END()

 } // namespace test
 } // namespace nlsr
	/* -- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -- */
	/*
	* Copyright (c) 2014-2023, The University of Memphis,
	* Regents of the University of California
	*
	* This file is part of NLSR (Named-data Link State Routing).
	* See AUTHORS.md for complete list of NLSR authors and contributors.
	*
	* NLSR 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.
	*
	* NLSR 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
	* NLSR, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include "route/fib.hpp"
	#include "adjacency-list.hpp"
	#include "conf-parameter.hpp"

	#include "tests/boost-test.hpp"
	#include "tests/io-key-chain-fixture.hpp"

	#include <ndn-cxx/mgmt/nfd/control-parameters.hpp>
	#include <ndn-cxx/util/dummy-client-face.hpp>

	namespace nlsr {
	namespace test {

	class FibFixture : public IoKeyChainFixture
	{
	public:
	FibFixture()
	: adjacencies(conf.getAdjacencyList())
	, fib(face, m_scheduler, adjacencies, conf, m_keyChain)
	, interests(face.sentInterests)
	{
	advanceClocks(1_s);

	Adjacent neighbor1(router1Name, ndn::FaceUri(router1FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router1FaceId);
	adjacencies.insert(neighbor1);

	Adjacent neighbor2(router2Name, ndn::FaceUri(router2FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router2FaceId);
	adjacencies.insert(neighbor2);

	Adjacent neighbor3(router3Name, ndn::FaceUri(router3FaceUri), 0, Adjacent::STATUS_ACTIVE, 0, router3FaceId);
	adjacencies.insert(neighbor3);

	conf.setMaxFacesPerPrefix(2);

	fib.setEntryRefreshTime(1);
	}

	static void
	extractRibCommandParameters(const ndn::Interest& interest,
	ndn::Name::Component& verb,
	ndn::nfd::ControlParameters& params)
	{
	const auto& name = interest.getName();
	verb = name.at(RIB_COMMAND_PREFIX.size());
	params.wireDecode(name.at(RIB_COMMAND_PREFIX.size() + 1).blockFromValue());
	}

	private:
	static inline const ndn::Name RIB_COMMAND_PREFIX{"/localhost/nfd/rib"};

	ndn::Scheduler m_scheduler{m_io};

	public:
	ndn::util::DummyClientFace face{m_io, m_keyChain, [] {
	ndn::util::DummyClientFace::Options opts;
	opts.enableRegistrationReply = true;
	opts.registrationReplyFaceId = 128;
	return opts;
	} ()};
	ConfParameter conf{face, m_keyChain};
	AdjacencyList& adjacencies;
	Fib fib;
	std::vector<ndn::Interest>& interests;

	static const ndn::Name router1Name;
	static const ndn::Name router2Name;
	static const ndn::Name router3Name;

	static const std::string router1FaceUri;
	static const std::string router2FaceUri;
	static const std::string router3FaceUri;

	static const uint32_t router1FaceId;
	static const uint32_t router2FaceId;
	static const uint32_t router3FaceId;
	};

	const ndn::Name FibFixture::router1Name = "/ndn/router1";
	const ndn::Name FibFixture::router2Name = "/ndn/router2";
	const ndn::Name FibFixture::router3Name = "/ndn/router3";

	const std::string FibFixture::router1FaceUri = "udp4://10.0.0.1";
	const std::string FibFixture::router2FaceUri = "udp4://10.0.0.2";
	const std::string FibFixture::router3FaceUri = "udp4://10.0.0.3";

	const uint32_t FibFixture::router1FaceId = 1;
	const uint32_t FibFixture::router2FaceId = 2;
	const uint32_t FibFixture::router3FaceId = 3;

	BOOST_FIXTURE_TEST_SUITE(TestFib, FibFixture)

	BOOST_AUTO_TEST_CASE(NextHopsAdd)
	{
	NextHop hop1(router1FaceUri, 10);
	NextHop hop2(router2FaceUri, 20);

	NexthopList hops;
	hops.addNextHop(hop1);
	hops.addNextHop(hop2);

	fib.update("/ndn/name", hops);
	face.processEvents(ndn::time::milliseconds(-1));

	// Should register faces 1 and 2 for /ndn/name
	BOOST_REQUIRE_EQUAL(interests.size(), 2);

	ndn::nfd::ControlParameters extractedParameters;
	ndn::Name::Component verb;
	std::vector<ndn::Interest>::iterator it = interests.begin();

	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router1FaceId &&
	verb == ndn::Name::Component("register"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router2FaceId &&
	verb == ndn::Name::Component("register"));
	}

	BOOST_AUTO_TEST_CASE(NextHopsNoChange)
	{
	NextHop hop1(router1FaceUri, 10);
	NextHop hop2(router2FaceUri, 20);

	NexthopList oldHops;
	oldHops.addNextHop(hop1);
	oldHops.addNextHop(hop2);

	fib.update("/ndn/name", oldHops);
	face.processEvents(ndn::time::milliseconds(-1));

	BOOST_REQUIRE_EQUAL(interests.size(), 2);
	interests.clear();

	fib.update("/ndn/name", oldHops);
	face.processEvents(ndn::time::milliseconds(-1));

	// Should register face 1 and 2 for /ndn/name
	BOOST_REQUIRE_EQUAL(interests.size(), 2);

	ndn::nfd::ControlParameters extractedParameters;
	ndn::Name::Component verb;
	std::vector<ndn::Interest>::iterator it = interests.begin();

	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router1FaceId &&
	verb == ndn::Name::Component("register"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router2FaceId &&
	verb == ndn::Name::Component("register"));
	}

	BOOST_AUTO_TEST_CASE(NextHopsRemoveAll)
	{
	NextHop hop1(router1FaceUri, 10);
	NextHop hop2(router2FaceUri, 20);

	NexthopList oldHops;
	oldHops.addNextHop(hop1);
	oldHops.addNextHop(hop2);

	fib.update("/ndn/name", oldHops);
	face.processEvents(ndn::time::milliseconds(-1));

	BOOST_REQUIRE_EQUAL(interests.size(), 2);
	interests.clear();

	NexthopList empty;

	fib.update("/ndn/name", empty);
	face.processEvents(ndn::time::milliseconds(-1));

	// Should unregister faces 1 and 2 for /ndn/name
	BOOST_CHECK_EQUAL(interests.size(), 2);

	ndn::nfd::ControlParameters extractedParameters;
	ndn::Name::Component verb;
	std::vector<ndn::Interest>::iterator it = interests.begin();

	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router1FaceId &&
	verb == ndn::Name::Component("unregister"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router2FaceId &&
	verb == ndn::Name::Component("unregister"));
	}

	BOOST_AUTO_TEST_CASE(NextHopsMaxPrefixes)
	{
	NextHop hop1(router1FaceUri, 10);
	NextHop hop2(router2FaceUri, 20);
	NextHop hop3(router3FaceUri, 30);

	NexthopList hops;
	hops.addNextHop(hop1);
	hops.addNextHop(hop2);
	hops.addNextHop(hop3);

	fib.update("/ndn/name", hops);
	face.processEvents(ndn::time::milliseconds(-1));

	// Should only register faces 1 and 2 for /ndn/name
	BOOST_CHECK_EQUAL(interests.size(), 2);

	ndn::nfd::ControlParameters extractedParameters;
	ndn::Name::Component verb;
	std::vector<ndn::Interest>::iterator it = interests.begin();

	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router1FaceId &&
	verb == ndn::Name::Component("register"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router2FaceId &&
	verb == ndn::Name::Component("register"));
	}

	BOOST_AUTO_TEST_CASE(NextHopsMaxPrefixesAfterRecalculation)
	{
	NextHop hop1(router1FaceUri, 10);
	NextHop hop2(router2FaceUri, 20);

	NexthopList hops;
	hops.addNextHop(hop1);
	hops.addNextHop(hop2);

	fib.update("/ndn/name", hops);
	face.processEvents(ndn::time::milliseconds(-1));

	// FIB
	// Name NextHops
	// /ndn/name (faceId=1, cost=10), (faceId=2, cost=20)
	BOOST_REQUIRE_EQUAL(interests.size(), 2);
	interests.clear();

	// Routing table is recalculated; a new more optimal path is found
	NextHop hop3(router3FaceUri, 5);
	hops.addNextHop(hop3);

	fib.update("/ndn/name", hops);
	face.processEvents(ndn::time::milliseconds(-1));

	// To maintain a max 2 face requirement, face 3 should be registered and face 2 should be
	// unregistered. Face 1 will also be re-registered.
	//
	// FIB
	// Name NextHops
	// /ndn/name (faceId=3, cost=5), (faceId=1, cost=10)

	BOOST_CHECK_EQUAL(interests.size(), 3);

	ndn::nfd::ControlParameters extractedParameters;
	ndn::Name::Component verb;
	std::vector<ndn::Interest>::iterator it = interests.begin();

	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router1FaceId &&
	verb == ndn::Name::Component("register"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router3FaceId &&
	verb == ndn::Name::Component("register"));

	++it;
	extractRibCommandParameters(*it, verb, extractedParameters);

	BOOST_CHECK(extractedParameters.getName() == "/ndn/name" &&
	extractedParameters.getFaceId() == router2FaceId &&
	verb == ndn::Name::Component("unregister"));
	}

	BOOST_FIXTURE_TEST_CASE(ScheduleFibEntryRefresh, FibFixture)
	{
	ndn::Name name1("/name/1");
	FibEntry fe;
	fe.name = name1;
	int origSeqNo = fe.seqNo;
	fib.m_table.emplace(name1, std::move(fe));

	fib.scheduleEntryRefresh(fe, [&] (auto& entry) { BOOST_CHECK_EQUAL(origSeqNo + 1, entry.seqNo); });
	this->advanceClocks(ndn::time::milliseconds(10), 1);

	// avoid "test case [...] did not check any assertions" message from Boost.Test
	BOOST_CHECK(true);
	}

	BOOST_AUTO_TEST_CASE(ShouldNotRefreshNeighborRoute) // #4799
	{
	NextHop hop1;
	hop1.setConnectingFaceUri(router1FaceUri);

	NexthopList hops;
	hops.addNextHop(hop1);

	// Simulate update for this neighbor from name prefix table
	fib.update(router1Name, hops);
	this->advanceClocks(ndn::time::seconds(1));

	// Should not send the register interest
	BOOST_CHECK_EQUAL(face.sentInterests.size(), 0);
	}

	BOOST_AUTO_TEST_CASE(PrefixWithdrawalFibUpdateBug) // #5179
	{
	fib.setEntryRefreshTime(3600);
	conf.setMaxFacesPerPrefix(3);

	// Three adjacencies of Neu
	Adjacent neighbor1("/ndn/memphis/router-memphis",
	ndn::FaceUri("udp4://10.0.0.9:6363"), 21, Adjacent::STATUS_ACTIVE, 0, router1FaceId);
	adjacencies.insert(neighbor1);

	Adjacent neighbor2("/ndn/michigan/router-michigan",
	ndn::FaceUri("udp4://10.0.0.13:6363"), 14, Adjacent::STATUS_ACTIVE, 0, router2FaceId);
	adjacencies.insert(neighbor2);

	Adjacent neighbor3("/ndn/savi/router-savi",
	ndn::FaceUri("udp4://10.0.0.26:6363"), 15, Adjacent::STATUS_ACTIVE, 0, router3FaceId);
	adjacencies.insert(neighbor3);

	// Wustl advertises /test
	NexthopList nhl1;
	nhl1.addNextHop(NextHop("udp4://10.0.0.13:6363", 28));
	nhl1.addNextHop(NextHop("udp4://10.0.0.9:6363", 38));
	nhl1.addNextHop(NextHop("udp4://10.0.0.26:6363", 44));
	fib.update("/test", nhl1);

	// Memphis advertises /test
	NexthopList nhl2;
	nhl2.addNextHop(NextHop("udp4://10.0.0.9:6363", 21));
	nhl2.addNextHop(NextHop("udp4://10.0.0.13:6363", 26));
	nhl2.addNextHop(NextHop("udp4://10.0.0.26:6363", 42));
	fib.update("/test", nhl2);

	advanceClocks(10_ms);
	face.sentInterests.clear();
	// Memphis withdraws /test
	// NamePrefixTable calls this saying we need to install the Wu routes
	// instead of the existing Memphis' cheaper routes
	fib.update("/test", nhl1);

	advanceClocks(10_ms);
	int numRegister = 0;
	// Do not expect any unregisters, just registers which will update the cost in NFD
	for (const auto& i : face.sentInterests) {
	if (i.getName().getPrefix(4) == "/localhost/nfd/rib/unregister") {
	BOOST_CHECK(false);
	}
	else {
	++numRegister;
	}
	}
	BOOST_CHECK_EQUAL(numRegister, 3);
	}

	BOOST_AUTO_TEST_SUITE_END()

	} // namespace test
	} // namespace nlsr