| /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| /* |
| * Copyright (c) 2014-2019, The University of Memphis, |
| * Regents of the University of California, |
| * Arizona Board of Regents. |
| * |
| * 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 "lsdb.hpp" |
| |
| #include "logger.hpp" |
| #include "nlsr.hpp" |
| #include "utility/name-helper.hpp" |
| |
| #include <ndn-cxx/security/signing-helpers.hpp> |
| |
| namespace nlsr { |
| |
| INIT_LOGGER(Lsdb); |
| |
| const ndn::Name::Component Lsdb::NAME_COMPONENT = ndn::Name::Component("lsdb"); |
| const ndn::time::seconds Lsdb::GRACE_PERIOD = ndn::time::seconds(10); |
| const ndn::time::steady_clock::TimePoint Lsdb::DEFAULT_LSA_RETRIEVAL_DEADLINE = |
| ndn::time::steady_clock::TimePoint::min(); |
| |
| Lsdb::Lsdb(ndn::Face& face, ndn::KeyChain& keyChain, |
| ndn::security::SigningInfo& signingInfo, ConfParameter& confParam, |
| NamePrefixTable& namePrefixTable, RoutingTable& routingTable) |
| : m_face(face) |
| , m_scheduler(face.getIoService()) |
| , m_signingInfo(signingInfo) |
| , m_confParam(confParam) |
| , m_namePrefixTable(namePrefixTable) |
| , m_routingTable(routingTable) |
| , m_sync(m_face, |
| [this] (const ndn::Name& routerName, const Lsa::Type& lsaType, |
| const uint64_t& sequenceNumber) { |
| return isLsaNew(routerName, lsaType, sequenceNumber); |
| }, m_confParam) |
| , m_lsaRefreshTime(ndn::time::seconds(m_confParam.getLsaRefreshTime())) |
| , m_thisRouterPrefix(m_confParam.getRouterPrefix().toUri()) |
| , m_adjLsaBuildInterval(m_confParam.getAdjLsaBuildInterval()) |
| , m_sequencingManager(m_confParam.getStateFileDir(), m_confParam.getHyperbolicState()) |
| , m_onNewLsaConnection(m_sync.onNewLsa->connect( |
| [this] (const ndn::Name& updateName, uint64_t sequenceNumber, |
| const ndn::Name& originRouter) { |
| ndn::Name lsaInterest{updateName}; |
| lsaInterest.appendNumber(sequenceNumber); |
| expressInterest(lsaInterest, 0); |
| })) |
| , m_segmentPublisher(m_face, keyChain) |
| , m_isBuildAdjLsaSheduled(false) |
| , m_adjBuildCount(0) |
| { |
| } |
| |
| Lsdb::~Lsdb() |
| { |
| for (const auto& sp : m_fetchers) { |
| sp->stop(); |
| } |
| } |
| |
| void |
| Lsdb::onFetchLsaError(uint32_t errorCode, |
| const std::string& msg, |
| const ndn::Name& interestName, |
| uint32_t retransmitNo, |
| const ndn::time::steady_clock::TimePoint& deadline, |
| ndn::Name lsaName, |
| uint64_t seqNo) |
| { |
| NLSR_LOG_DEBUG("Failed to fetch LSA: " << lsaName << ", Error code: " << errorCode |
| << ", Message: " << msg); |
| |
| if (ndn::time::steady_clock::now() < deadline) { |
| auto it = m_highestSeqNo.find(lsaName); |
| if (it != m_highestSeqNo.end() && it->second == seqNo) { |
| // If the SegmentFetcher failed due to an Interest timeout, it is safe to re-express |
| // immediately since at the least the LSA Interest lifetime has elapsed. |
| // Otherwise, it is necessary to delay the Interest re-expression to prevent |
| // the potential for constant Interest flooding. |
| ndn::time::seconds delay = m_confParam.getLsaInterestLifetime(); |
| |
| if (errorCode == ndn::util::SegmentFetcher::ErrorCode::INTEREST_TIMEOUT) { |
| delay = ndn::time::seconds(0); |
| } |
| |
| m_scheduler.schedule(delay, std::bind(&Lsdb::expressInterest, this, |
| interestName, retransmitNo + 1, deadline)); |
| } |
| } |
| } |
| |
| void |
| Lsdb::afterFetchLsa(const ndn::ConstBufferPtr& bufferPtr, const ndn::Name& interestName) |
| { |
| std::shared_ptr<ndn::Data> data = std::make_shared<ndn::Data>(ndn::Name(interestName)); |
| data->setContent(ndn::Block(bufferPtr)); |
| |
| NLSR_LOG_DEBUG("Received data for LSA(name): " << data->getName()); |
| |
| ndn::Name lsaName = interestName.getSubName(0, interestName.size()-1); |
| uint64_t seqNo = interestName[-1].toNumber(); |
| |
| if (m_highestSeqNo.find(lsaName) == m_highestSeqNo.end()) { |
| m_highestSeqNo[lsaName] = seqNo; |
| } |
| else if (seqNo > m_highestSeqNo[lsaName]) { |
| m_highestSeqNo[lsaName] = seqNo; |
| NLSR_LOG_TRACE("SeqNo for LSA(name): " << data->getName() << " updated"); |
| } |
| else if (seqNo < m_highestSeqNo[lsaName]) { |
| return; |
| } |
| |
| onContentValidated(data); |
| } |
| |
| /*! \brief Compares if a name LSA is the same as the one specified by key |
| |
| \param nlsa1 A name LSA object |
| \param key A key of an originating router to compare to nlsa1 |
| */ |
| static bool |
| nameLsaCompareByKey(const NameLsa& nlsa1, const ndn::Name& key) |
| { |
| return nlsa1.getKey() == key; |
| } |
| |
| bool |
| Lsdb::buildAndInstallOwnNameLsa() |
| { |
| NameLsa nameLsa(m_confParam.getRouterPrefix(), |
| m_sequencingManager.getNameLsaSeq() + 1, |
| getLsaExpirationTimePoint(), |
| m_confParam.getNamePrefixList()); |
| m_sequencingManager.increaseNameLsaSeq(); |
| |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::NAME, m_sequencingManager.getNameLsaSeq()); |
| |
| return installNameLsa(nameLsa); |
| } |
| |
| NameLsa* |
| Lsdb::findNameLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_nameLsdb.begin(), m_nameLsdb.end(), |
| std::bind(nameLsaCompareByKey, _1, key)); |
| if (it != m_nameLsdb.end()) { |
| return &*it; |
| } |
| return nullptr; |
| } |
| |
| bool |
| Lsdb::isNameLsaNew(const ndn::Name& key, uint64_t seqNo) |
| { |
| NameLsa* nameLsaCheck = findNameLsa(key); |
| // Is the name in the LSDB |
| if (nameLsaCheck != nullptr) { |
| // And the supplied seq no is the highest so far |
| if (nameLsaCheck->getLsSeqNo() < seqNo) { |
| return true; |
| } |
| else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| ndn::scheduler::EventId |
| Lsdb::scheduleNameLsaExpiration(const ndn::Name& key, int seqNo, |
| const ndn::time::seconds& expTime) |
| { |
| return m_scheduler.schedule(expTime + GRACE_PERIOD, |
| std::bind(&Lsdb::expireOrRefreshNameLsa, this, key, seqNo)); |
| } |
| |
| bool |
| Lsdb::installNameLsa(NameLsa& nlsa) |
| { |
| NLSR_LOG_TRACE("installNameLsa"); |
| ndn::time::seconds timeToExpire = m_lsaRefreshTime; |
| NameLsa* chkNameLsa = findNameLsa(nlsa.getKey()); |
| // Determines if the name LSA is new or not. |
| if (chkNameLsa == nullptr) { |
| addNameLsa(nlsa); |
| NLSR_LOG_DEBUG("New Name LSA"); |
| NLSR_LOG_DEBUG("Adding Name Lsa"); |
| nlsa.writeLog(); |
| |
| NLSR_LOG_TRACE("nlsa.getOrigRouter(): " << nlsa.getOrigRouter()); |
| NLSR_LOG_TRACE("m_confParam.getRouterPrefix(): " << m_confParam.getRouterPrefix()); |
| |
| if (nlsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| // If this name LSA is from another router, add the advertised |
| // prefixes to the NPT. |
| m_namePrefixTable.addEntry(nlsa.getOrigRouter(), nlsa.getOrigRouter()); |
| |
| for (const auto& name : nlsa.getNpl().getNames()) { |
| if (name != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.addEntry(name, nlsa.getOrigRouter()); |
| } |
| } |
| auto duration = nlsa.getExpirationTimePoint() - ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| |
| nlsa.setExpiringEventId(scheduleNameLsaExpiration(nlsa.getKey(), |
| nlsa.getLsSeqNo(), |
| timeToExpire)); |
| } |
| // Else this is a known name LSA, so we are updating it. |
| else { |
| NLSR_LOG_TRACE("Known name lsa"); |
| NLSR_LOG_TRACE("chkNameLsa->getLsSeqNo(): " << chkNameLsa->getLsSeqNo()); |
| NLSR_LOG_TRACE("nlsa.getLsSeqNo(): " << nlsa.getLsSeqNo()); |
| if (chkNameLsa->getLsSeqNo() < nlsa.getLsSeqNo()) { |
| NLSR_LOG_DEBUG("Updated Name LSA. Updating LSDB"); |
| NLSR_LOG_DEBUG("Deleting Name Lsa"); |
| chkNameLsa->writeLog(); |
| chkNameLsa->setLsSeqNo(nlsa.getLsSeqNo()); |
| chkNameLsa->setExpirationTimePoint(nlsa.getExpirationTimePoint()); |
| chkNameLsa->getNpl().sort(); |
| nlsa.getNpl().sort(); |
| // Obtain the set difference of the current and the incoming |
| // name prefix sets, and add those. |
| std::list<ndn::Name> newNames = nlsa.getNpl().getNames(); |
| std::list<ndn::Name> oldNames = chkNameLsa->getNpl().getNames(); |
| std::list<ndn::Name> namesToAdd; |
| std::set_difference(newNames.begin(), newNames.end(), oldNames.begin(), oldNames.end(), |
| std::inserter(namesToAdd, namesToAdd.begin())); |
| for (const auto& name : namesToAdd) { |
| chkNameLsa->addName(name); |
| if (nlsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| if (name != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.addEntry(name, nlsa.getOrigRouter()); |
| } |
| } |
| } |
| |
| chkNameLsa->getNpl().sort(); |
| |
| // Also remove any names that are no longer being advertised. |
| std::list<ndn::Name> namesToRemove; |
| std::set_difference(oldNames.begin(), oldNames.end(), newNames.begin(), newNames.end(), |
| std::inserter(namesToRemove, namesToRemove.begin())); |
| for (const auto& name : namesToRemove) { |
| NLSR_LOG_DEBUG("Removing name LSA no longer advertised: " << name); |
| chkNameLsa->removeName(name); |
| if (nlsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| if (name != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.removeEntry(name, nlsa.getOrigRouter()); |
| } |
| } |
| } |
| |
| if (nlsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| auto duration = nlsa.getExpirationTimePoint() - ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| chkNameLsa->getExpiringEventId().cancel(); |
| chkNameLsa->setExpiringEventId(scheduleNameLsaExpiration(nlsa.getKey(), |
| nlsa.getLsSeqNo(), |
| timeToExpire)); |
| NLSR_LOG_DEBUG("Adding Name Lsa"); |
| chkNameLsa->writeLog(); |
| } |
| } |
| return true; |
| } |
| |
| bool |
| Lsdb::addNameLsa(NameLsa& nlsa) |
| { |
| auto it = std::find_if(m_nameLsdb.begin(), m_nameLsdb.end(), |
| std::bind(nameLsaCompareByKey, _1, nlsa.getKey())); |
| if (it == m_nameLsdb.end()) { |
| m_nameLsdb.push_back(nlsa); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| Lsdb::removeNameLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_nameLsdb.begin(), m_nameLsdb.end(), |
| std::bind(nameLsaCompareByKey, _1, key)); |
| if (it != m_nameLsdb.end()) { |
| NLSR_LOG_DEBUG("Deleting Name Lsa"); |
| it->writeLog(); |
| // If the requested name LSA is not ours, we also need to remove |
| // its entries from the NPT. |
| if (it->getOrigRouter() != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.removeEntry(it->getOrigRouter(), it->getOrigRouter()); |
| |
| for (const auto& name : it->getNpl().getNames()) { |
| if (name != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.removeEntry(name, it->getOrigRouter()); |
| } |
| } |
| } |
| m_nameLsdb.erase(it); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| Lsdb::doesNameLsaExist(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_nameLsdb.begin(), m_nameLsdb.end(), |
| std::bind(nameLsaCompareByKey, _1, key)); |
| return it != m_nameLsdb.end(); |
| } |
| |
| void |
| Lsdb::writeNameLsdbLog() |
| { |
| NLSR_LOG_DEBUG("---------------Name LSDB-------------------"); |
| for (const auto& nlsa : m_nameLsdb) { |
| nlsa.writeLog(); |
| } |
| } |
| |
| const std::list<NameLsa>& |
| Lsdb::getNameLsdb() const |
| { |
| return m_nameLsdb; |
| } |
| |
| // Cor LSA and LSDB related Functions start here |
| |
| /*! \brief Compares whether an LSA object is the same as a key. |
| \param clsa The cor. LSA to check the identity of. |
| \param key The key of the publishing router to check against. |
| */ |
| static bool |
| corLsaCompareByKey(const CoordinateLsa& clsa, const ndn::Name& key) |
| { |
| return clsa.getKey() == key; |
| } |
| |
| bool |
| Lsdb::buildAndInstallOwnCoordinateLsa() |
| { |
| CoordinateLsa corLsa(m_confParam.getRouterPrefix(), |
| m_sequencingManager.getCorLsaSeq() + 1, |
| getLsaExpirationTimePoint(), |
| m_confParam.getCorR(), |
| m_confParam.getCorTheta()); |
| |
| // Sync coordinate LSAs if using HR or HR dry run. |
| if (m_confParam.getHyperbolicState() != HYPERBOLIC_STATE_OFF) { |
| m_sequencingManager.increaseCorLsaSeq(); |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::COORDINATE, m_sequencingManager.getCorLsaSeq()); |
| } |
| |
| installCoordinateLsa(corLsa); |
| |
| return true; |
| } |
| |
| CoordinateLsa* |
| Lsdb::findCoordinateLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_corLsdb.begin(), m_corLsdb.end(), |
| std::bind(corLsaCompareByKey, _1, key)); |
| if (it != m_corLsdb.end()) { |
| return &*it; |
| } |
| return nullptr; |
| } |
| |
| bool |
| Lsdb::isCoordinateLsaNew(const ndn::Name& key, uint64_t seqNo) |
| { |
| CoordinateLsa* clsa = findCoordinateLsa(key); |
| // Is the coordinate LSA in the LSDB already |
| if (clsa != nullptr) { |
| // And the seq no is newer (higher) than the current one |
| if (clsa->getLsSeqNo() < seqNo) { |
| return true; |
| } |
| else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| // Schedules a refresh/expire event in the scheduler. |
| // \param key The name of the router that published the LSA. |
| // \param seqNo the seq. no. associated with the LSA to check. |
| // \param expTime How long to wait before triggering the event. |
| ndn::scheduler::EventId |
| Lsdb::scheduleCoordinateLsaExpiration(const ndn::Name& key, int seqNo, |
| const ndn::time::seconds& expTime) |
| { |
| return m_scheduler.schedule(expTime + GRACE_PERIOD, |
| std::bind(&Lsdb::expireOrRefreshCoordinateLsa, this, key, seqNo)); |
| } |
| |
| bool |
| Lsdb::installCoordinateLsa(CoordinateLsa& clsa) |
| { |
| ndn::time::seconds timeToExpire = m_lsaRefreshTime; |
| CoordinateLsa* chkCorLsa = findCoordinateLsa(clsa.getKey()); |
| // Checking whether the LSA is new or not. |
| if (chkCorLsa == nullptr) { |
| NLSR_LOG_DEBUG("New Coordinate LSA. Adding to LSDB"); |
| NLSR_LOG_DEBUG("Adding Coordinate Lsa"); |
| clsa.writeLog(); |
| addCoordinateLsa(clsa); |
| |
| // Register the LSA's origin router prefix |
| if (clsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.addEntry(clsa.getOrigRouter(), |
| clsa.getOrigRouter()); |
| } |
| if (m_confParam.getHyperbolicState() != HYPERBOLIC_STATE_OFF) { |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| // Set the expiration time for the new LSA. |
| if (clsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| ndn::time::system_clock::Duration duration = clsa.getExpirationTimePoint() - |
| ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| scheduleCoordinateLsaExpiration(clsa.getKey(), |
| clsa.getLsSeqNo(), timeToExpire); |
| } |
| // We are just updating this LSA. |
| else { |
| if (chkCorLsa->getLsSeqNo() < clsa.getLsSeqNo()) { |
| NLSR_LOG_DEBUG("Updated Coordinate LSA. Updating LSDB"); |
| NLSR_LOG_DEBUG("Deleting Coordinate Lsa"); |
| chkCorLsa->writeLog(); |
| chkCorLsa->setLsSeqNo(clsa.getLsSeqNo()); |
| chkCorLsa->setExpirationTimePoint(clsa.getExpirationTimePoint()); |
| // If the new LSA contains new routing information, update the LSDB with it. |
| if (!chkCorLsa->isEqualContent(clsa)) { |
| chkCorLsa->setCorRadius(clsa.getCorRadius()); |
| chkCorLsa->setCorTheta(clsa.getCorTheta()); |
| if (m_confParam.getHyperbolicState() >= HYPERBOLIC_STATE_ON) { |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| } |
| // If this is an LSA from another router, refresh its expiration time. |
| if (clsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| auto duration = clsa.getExpirationTimePoint() - ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| chkCorLsa->getExpiringEventId().cancel(); |
| chkCorLsa->setExpiringEventId(scheduleCoordinateLsaExpiration(clsa.getKey(), |
| clsa.getLsSeqNo(), |
| timeToExpire)); |
| NLSR_LOG_DEBUG("Adding Coordinate Lsa"); |
| chkCorLsa->writeLog(); |
| } |
| } |
| return true; |
| } |
| |
| bool |
| Lsdb::addCoordinateLsa(CoordinateLsa& clsa) |
| { |
| auto it = std::find_if(m_corLsdb.begin(), m_corLsdb.end(), |
| std::bind(corLsaCompareByKey, _1, clsa.getKey())); |
| if (it == m_corLsdb.end()) { |
| m_corLsdb.push_back(clsa); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| Lsdb::removeCoordinateLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_corLsdb.begin(), m_corLsdb.end(), |
| std::bind(corLsaCompareByKey, _1, key)); |
| |
| if (it != m_corLsdb.end()) { |
| NLSR_LOG_DEBUG("Deleting Coordinate Lsa"); |
| it->writeLog(); |
| |
| if (it->getOrigRouter() != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.removeEntry(it->getOrigRouter(), it->getOrigRouter()); |
| } |
| |
| m_corLsdb.erase(it); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| Lsdb::doesCoordinateLsaExist(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_corLsdb.begin(), m_corLsdb.end(), |
| std::bind(corLsaCompareByKey, _1, key)); |
| return it != m_corLsdb.end(); |
| } |
| |
| void |
| Lsdb::writeCorLsdbLog() |
| { |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_OFF) { |
| return; |
| } |
| |
| NLSR_LOG_DEBUG("---------------Cor LSDB-------------------"); |
| for (const auto& corLsa : m_corLsdb) { |
| corLsa.writeLog(); |
| } |
| } |
| |
| const std::list<CoordinateLsa>& |
| Lsdb::getCoordinateLsdb() const |
| { |
| return m_corLsdb; |
| } |
| |
| // Adj LSA and LSDB related function starts here |
| |
| /*! \brief Returns whether an adj. LSA object is from some router. |
| \param alsa The adj. LSA object. |
| \param key The router name that you want to compare the LSA with. |
| */ |
| static bool |
| adjLsaCompareByKey(AdjLsa& alsa, const ndn::Name& key) |
| { |
| return alsa.getKey() == key; |
| } |
| |
| void |
| Lsdb::scheduleAdjLsaBuild() |
| { |
| m_adjBuildCount++; |
| |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_ON) { |
| // Don't build adjacency LSAs in hyperbolic routing |
| NLSR_LOG_DEBUG("Adjacency LSA not built. Currently in hyperbolic routing state."); |
| return; |
| } |
| |
| if (m_isBuildAdjLsaSheduled) { |
| NLSR_LOG_DEBUG("Rescheduling Adjacency LSA build in " << m_adjLsaBuildInterval); |
| } |
| else { |
| NLSR_LOG_DEBUG("Scheduling Adjacency LSA build in " << m_adjLsaBuildInterval); |
| m_isBuildAdjLsaSheduled = true; |
| } |
| m_scheduledAdjLsaBuild = m_scheduler.schedule(m_adjLsaBuildInterval, [this] { buildAdjLsa(); }); |
| } |
| |
| void |
| Lsdb::buildAdjLsa() |
| { |
| NLSR_LOG_TRACE("Lsdb::buildAdjLsa called"); |
| |
| m_isBuildAdjLsaSheduled = false; |
| |
| if (m_confParam.getAdjacencyList().isAdjLsaBuildable(m_confParam.getInterestRetryNumber())) { |
| |
| int adjBuildCount = m_adjBuildCount; |
| // Only do the adjLsa build if there's one scheduled |
| if (adjBuildCount > 0) { |
| // It only makes sense to do the adjLsa build if we have neighbors |
| if (m_confParam.getAdjacencyList().getNumOfActiveNeighbor() > 0) { |
| NLSR_LOG_DEBUG("Building and installing own Adj LSA"); |
| buildAndInstallOwnAdjLsa(); |
| } |
| // We have no active neighbors, meaning no one can route through |
| // us. So delete our entry in the LSDB. This prevents this |
| // router from refreshing the LSA, eventually causing other |
| // routers to delete it, too. |
| else { |
| NLSR_LOG_DEBUG("Removing own Adj LSA; no ACTIVE neighbors"); |
| // Get this router's key |
| ndn::Name key = m_confParam.getRouterPrefix(); |
| key.append(std::to_string(Lsa::Type::ADJACENCY)); |
| |
| removeAdjLsa(key); |
| // Recompute routing table after removal |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| // In the case that during building the adj LSA, the FIB has to |
| // wait on an Interest response, the number of scheduled adj LSA |
| // builds could change, so we shouldn't just set it to 0. |
| m_adjBuildCount = m_adjBuildCount - adjBuildCount; |
| } |
| } |
| // We are still waiting to know the adjacency status of some |
| // neighbor, so schedule a build for later (when all that has |
| // hopefully finished) |
| else { |
| m_isBuildAdjLsaSheduled = true; |
| auto schedulingTime = ndn::time::seconds(m_confParam.getInterestRetryNumber() * |
| m_confParam.getInterestResendTime()); |
| m_scheduledAdjLsaBuild = m_scheduler.schedule(schedulingTime, [this] { buildAdjLsa(); }); |
| } |
| } |
| |
| bool |
| Lsdb::addAdjLsa(AdjLsa& alsa) |
| { |
| auto it = std::find_if(m_adjLsdb.begin(), m_adjLsdb.end(), |
| std::bind(adjLsaCompareByKey, _1, alsa.getKey())); |
| if (it == m_adjLsdb.end()) { |
| m_adjLsdb.push_back(alsa); |
| // Add any new name prefixes to the NPT |
| // Only add NPT entries if this is an adj LSA from another router. |
| if (alsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| // Pass the originating router as both the name to register and |
| // where it came from. |
| m_namePrefixTable.addEntry(alsa.getOrigRouter(), alsa.getOrigRouter()); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| AdjLsa* |
| Lsdb::findAdjLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_adjLsdb.begin(), m_adjLsdb.end(), |
| std::bind(adjLsaCompareByKey, _1, key)); |
| if (it != m_adjLsdb.end()) { |
| return &*it; |
| } |
| return nullptr; |
| } |
| |
| bool |
| Lsdb::isAdjLsaNew(const ndn::Name& key, uint64_t seqNo) |
| { |
| AdjLsa* adjLsaCheck = findAdjLsa(key); |
| // If it is in the LSDB |
| if (adjLsaCheck != nullptr) { |
| // And the supplied seq no is newer (higher) than the current one. |
| if (adjLsaCheck->getLsSeqNo() < seqNo) { |
| return true; |
| } |
| else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| ndn::scheduler::EventId |
| Lsdb::scheduleAdjLsaExpiration(const ndn::Name& key, int seqNo, |
| const ndn::time::seconds& expTime) |
| { |
| return m_scheduler.schedule(expTime + GRACE_PERIOD, |
| std::bind(&Lsdb::expireOrRefreshAdjLsa, this, key, seqNo)); |
| } |
| |
| bool |
| Lsdb::installAdjLsa(AdjLsa& alsa) |
| { |
| ndn::time::seconds timeToExpire = m_lsaRefreshTime; |
| AdjLsa* chkAdjLsa = findAdjLsa(alsa.getKey()); |
| // If this adj. LSA is not in the LSDB already |
| if (chkAdjLsa == nullptr) { |
| NLSR_LOG_DEBUG("New Adj LSA. Adding to LSDB"); |
| NLSR_LOG_DEBUG("Adding Adj Lsa"); |
| alsa.writeLog(); |
| addAdjLsa(alsa); |
| |
| m_routingTable.scheduleRoutingTableCalculation(); |
| if (alsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| ndn::time::system_clock::Duration duration = alsa.getExpirationTimePoint() - |
| ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| scheduleAdjLsaExpiration(alsa.getKey(), alsa.getLsSeqNo(), timeToExpire); |
| } |
| else { |
| if (chkAdjLsa->getLsSeqNo() < alsa.getLsSeqNo()) { |
| NLSR_LOG_DEBUG("Updated Adj LSA. Updating LSDB"); |
| NLSR_LOG_DEBUG("Deleting Adj Lsa"); |
| chkAdjLsa->writeLog(); |
| chkAdjLsa->setLsSeqNo(alsa.getLsSeqNo()); |
| chkAdjLsa->setExpirationTimePoint(alsa.getExpirationTimePoint()); |
| // If the new adj LSA has new content, update the contents of |
| // the LSDB entry. Additionally, since we've changed the |
| // contents of the LSDB, we have to schedule a routing |
| // calculation. |
| if (!chkAdjLsa->isEqualContent(alsa)) { |
| chkAdjLsa->getAdl().reset(); |
| chkAdjLsa->getAdl().addAdjacents(alsa.getAdl()); |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| if (alsa.getOrigRouter() != m_confParam.getRouterPrefix()) { |
| auto duration = alsa.getExpirationTimePoint() - ndn::time::system_clock::now(); |
| timeToExpire = ndn::time::duration_cast<ndn::time::seconds>(duration); |
| } |
| chkAdjLsa->getExpiringEventId().cancel(); |
| chkAdjLsa->setExpiringEventId(scheduleAdjLsaExpiration(alsa.getKey(), |
| alsa.getLsSeqNo(), |
| timeToExpire)); |
| NLSR_LOG_DEBUG("Adding Adj Lsa"); |
| chkAdjLsa->writeLog(); |
| } |
| } |
| return true; |
| } |
| |
| bool |
| Lsdb::buildAndInstallOwnAdjLsa() |
| { |
| AdjLsa adjLsa(m_confParam.getRouterPrefix(), |
| m_sequencingManager.getAdjLsaSeq() + 1, |
| getLsaExpirationTimePoint(), |
| m_confParam.getAdjacencyList().getNumOfActiveNeighbor(), |
| m_confParam.getAdjacencyList()); |
| |
| //Sync adjacency LSAs if link-state or dry-run HR is enabled. |
| if (m_confParam.getHyperbolicState() != HYPERBOLIC_STATE_ON) { |
| m_sequencingManager.increaseAdjLsaSeq(); |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::ADJACENCY, m_sequencingManager.getAdjLsaSeq()); |
| } |
| |
| return installAdjLsa(adjLsa); |
| } |
| |
| bool |
| Lsdb::removeAdjLsa(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_adjLsdb.begin(), m_adjLsdb.end(), |
| std::bind(adjLsaCompareByKey, _1, key)); |
| if (it != m_adjLsdb.end()) { |
| NLSR_LOG_DEBUG("Deleting Adj Lsa"); |
| it->writeLog(); |
| if (it->getOrigRouter() != m_confParam.getRouterPrefix()) { |
| m_namePrefixTable.removeEntry(it->getOrigRouter(), it->getOrigRouter()); |
| } |
| m_adjLsdb.erase(it); |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| Lsdb::doesAdjLsaExist(const ndn::Name& key) |
| { |
| auto it = std::find_if(m_adjLsdb.begin(), m_adjLsdb.end(), |
| std::bind(adjLsaCompareByKey, _1, key)); |
| return it != m_adjLsdb.end(); |
| } |
| |
| const std::list<AdjLsa>& |
| Lsdb::getAdjLsdb() const |
| { |
| return m_adjLsdb; |
| } |
| |
| // This function determines whether a name LSA should be refreshed |
| // or expired. The conditions for getting refreshed are: it is still |
| // in the LSDB, it hasn't been updated by something else already (as |
| // evidenced by its seq. no.), and this is the originating router for |
| // the LSA. Is it let expire in all other cases. |
| // lsaKey is the key of the LSA's publishing router. |
| // seqNo is the seq. no. of the candidate LSA. |
| void |
| Lsdb::expireOrRefreshNameLsa(const ndn::Name& lsaKey, uint64_t seqNo) |
| { |
| NLSR_LOG_DEBUG("Lsdb::expireOrRefreshNameLsa Called"); |
| NLSR_LOG_DEBUG("LSA Key : " << lsaKey << " Seq No: " << seqNo); |
| NameLsa* chkNameLsa = findNameLsa(lsaKey); |
| // If this name LSA exists in the LSDB |
| if (chkNameLsa != nullptr) { |
| NLSR_LOG_DEBUG("LSA Exists with seq no: " << chkNameLsa->getLsSeqNo()); |
| // If its seq no is the one we are expecting. |
| if (chkNameLsa->getLsSeqNo() == seqNo) { |
| if (chkNameLsa->getOrigRouter() == m_thisRouterPrefix) { |
| NLSR_LOG_DEBUG("Own Name LSA, so refreshing it"); |
| NLSR_LOG_DEBUG("Deleting Name Lsa"); |
| chkNameLsa->writeLog(); |
| chkNameLsa->setLsSeqNo(chkNameLsa->getLsSeqNo() + 1); |
| m_sequencingManager.setNameLsaSeq(chkNameLsa->getLsSeqNo()); |
| chkNameLsa->setExpirationTimePoint(getLsaExpirationTimePoint()); |
| NLSR_LOG_DEBUG("Adding Name Lsa"); |
| chkNameLsa->writeLog(); |
| // schedule refreshing event again |
| chkNameLsa->setExpiringEventId(scheduleNameLsaExpiration(chkNameLsa->getKey(), |
| chkNameLsa->getLsSeqNo(), |
| m_lsaRefreshTime)); |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::NAME, m_sequencingManager.getNameLsaSeq()); |
| } |
| // Since we cannot refresh other router's LSAs, our only choice is to expire. |
| else { |
| NLSR_LOG_DEBUG("Other's Name LSA, so removing from LSDB"); |
| removeNameLsa(lsaKey); |
| } |
| } |
| } |
| } |
| |
| // This function determines whether an adj. LSA should be refreshed |
| // or expired. The conditions for getting refreshed are: it is still |
| // in the LSDB, it hasn't been updated by something else already (as |
| // evidenced by its seq. no.), and this is the originating router for |
| // the LSA. Is it let expire in all other cases. |
| // lsaKey is the key of the LSA's publishing router. |
| // seqNo is the seq. no. of the candidate LSA. |
| void |
| Lsdb::expireOrRefreshAdjLsa(const ndn::Name& lsaKey, uint64_t seqNo) |
| { |
| NLSR_LOG_DEBUG("Lsdb::expireOrRefreshAdjLsa Called"); |
| NLSR_LOG_DEBUG("LSA Key: " << lsaKey << " Seq No: " << seqNo); |
| AdjLsa* chkAdjLsa = findAdjLsa(lsaKey); |
| // If this is a valid LSA |
| if (chkAdjLsa != nullptr) { |
| NLSR_LOG_DEBUG("LSA Exists with seq no: " << chkAdjLsa->getLsSeqNo()); |
| // And if it hasn't been updated for some other reason |
| if (chkAdjLsa->getLsSeqNo() == seqNo) { |
| // If it is our own LSA |
| if (chkAdjLsa->getOrigRouter() == m_thisRouterPrefix) { |
| NLSR_LOG_DEBUG("Own Adj LSA, so refreshing it"); |
| NLSR_LOG_DEBUG("Deleting Adj Lsa"); |
| chkAdjLsa->writeLog(); |
| chkAdjLsa->setLsSeqNo(chkAdjLsa->getLsSeqNo() + 1); |
| m_sequencingManager.setAdjLsaSeq(chkAdjLsa->getLsSeqNo()); |
| chkAdjLsa->setExpirationTimePoint(getLsaExpirationTimePoint()); |
| NLSR_LOG_DEBUG("Adding Adj Lsa"); |
| chkAdjLsa->writeLog(); |
| // schedule refreshing event again |
| chkAdjLsa->setExpiringEventId(scheduleAdjLsaExpiration(chkAdjLsa->getKey(), |
| chkAdjLsa->getLsSeqNo(), |
| m_lsaRefreshTime)); |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::ADJACENCY, m_sequencingManager.getAdjLsaSeq()); |
| } |
| // An LSA from another router is expiring |
| else { |
| NLSR_LOG_DEBUG("Other's Adj LSA, so removing from LSDB"); |
| removeAdjLsa(lsaKey); |
| } |
| // We have changed the contents of the LSDB, so we have to |
| // schedule a routing calculation |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| } |
| } |
| |
| // This function determines whether an adj. LSA should be refreshed |
| // or expired. The conditions for getting refreshed are: it is still |
| // in the LSDB, it hasn't been updated by something else already (as |
| // evidenced by its seq. no.), and this is the originating router for |
| // the LSA. It is let expire in all other cases. |
| // lsaKey is the key of the LSA's publishing router. |
| // seqNo is the seq. no. of the candidate LSA. |
| void |
| Lsdb::expireOrRefreshCoordinateLsa(const ndn::Name& lsaKey, |
| uint64_t seqNo) |
| { |
| NLSR_LOG_DEBUG("Lsdb::expireOrRefreshCorLsa Called "); |
| NLSR_LOG_DEBUG("LSA Key : " << lsaKey << " Seq No: " << seqNo); |
| CoordinateLsa* chkCorLsa = findCoordinateLsa(lsaKey); |
| // Whether the LSA is in the LSDB or not. |
| if (chkCorLsa != nullptr) { |
| NLSR_LOG_DEBUG("LSA Exists with seq no: " << chkCorLsa->getLsSeqNo()); |
| // Whether the LSA has been updated without our knowledge. |
| if (chkCorLsa->getLsSeqNo() == seqNo) { |
| if (chkCorLsa->getOrigRouter() == m_thisRouterPrefix) { |
| NLSR_LOG_DEBUG("Own Cor LSA, so refreshing it"); |
| NLSR_LOG_DEBUG("Deleting Coordinate Lsa"); |
| chkCorLsa->writeLog(); |
| chkCorLsa->setLsSeqNo(chkCorLsa->getLsSeqNo() + 1); |
| if (m_confParam.getHyperbolicState() != HYPERBOLIC_STATE_OFF) { |
| m_sequencingManager.setCorLsaSeq(chkCorLsa->getLsSeqNo()); |
| } |
| |
| chkCorLsa->setExpirationTimePoint(getLsaExpirationTimePoint()); |
| NLSR_LOG_DEBUG("Adding Coordinate Lsa"); |
| chkCorLsa->writeLog(); |
| // schedule refreshing event again |
| chkCorLsa->setExpiringEventId(scheduleCoordinateLsaExpiration( |
| chkCorLsa->getKey(), |
| chkCorLsa->getLsSeqNo(), |
| m_lsaRefreshTime)); |
| // Only sync coordinate LSAs if link-state routing is disabled |
| if (m_confParam.getHyperbolicState() != HYPERBOLIC_STATE_OFF) { |
| m_sequencingManager.writeSeqNoToFile(); |
| m_sync.publishRoutingUpdate(Lsa::Type::COORDINATE, m_sequencingManager.getCorLsaSeq()); |
| } |
| } |
| // We can't refresh other router's LSAs, so we remove it. |
| else { |
| NLSR_LOG_DEBUG("Other's Cor LSA, so removing from LSDB"); |
| removeCoordinateLsa(lsaKey); |
| } |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_ON) { |
| m_routingTable.scheduleRoutingTableCalculation(); |
| } |
| } |
| } |
| } |
| |
| void |
| Lsdb::expressInterest(const ndn::Name& interestName, uint32_t timeoutCount, |
| ndn::time::steady_clock::TimePoint deadline) |
| { |
| // increment SENT_LSA_INTEREST |
| lsaIncrementSignal(Statistics::PacketType::SENT_LSA_INTEREST); |
| |
| if (deadline == DEFAULT_LSA_RETRIEVAL_DEADLINE) { |
| deadline = ndn::time::steady_clock::now() + ndn::time::seconds(static_cast<int>(LSA_REFRESH_TIME_MAX)); |
| } |
| // The first component of the interest is the name. |
| ndn::Name lsaName = interestName.getSubName(0, interestName.size()-1); |
| // The seq no is the last |
| uint64_t seqNo = interestName[-1].toNumber(); |
| |
| // If the LSA is not found in the list currently. |
| if (m_highestSeqNo.find(lsaName) == m_highestSeqNo.end()) { |
| m_highestSeqNo[lsaName] = seqNo; |
| } |
| // If the new seq no is higher, that means the LSA is valid |
| else if (seqNo > m_highestSeqNo[lsaName]) { |
| m_highestSeqNo[lsaName] = seqNo; |
| } |
| // Otherwise, its an old/invalid LSA |
| else if (seqNo < m_highestSeqNo[lsaName]) { |
| return; |
| } |
| |
| ndn::Interest interest(interestName); |
| ndn::util::SegmentFetcher::Options options; |
| options.interestLifetime = m_confParam.getLsaInterestLifetime(); |
| |
| NLSR_LOG_DEBUG("Fetching Data for LSA: " << interestName << " Seq number: " << seqNo); |
| auto fetcher = ndn::util::SegmentFetcher::start(m_face, interest, |
| m_confParam.getValidator(), options); |
| |
| auto it = m_fetchers.insert(fetcher).first; |
| |
| fetcher->afterSegmentValidated.connect([this] (const ndn::Data& data) { |
| // Nlsr class subscribes to this to fetch certificates |
| afterSegmentValidatedSignal(data); |
| |
| // If we don't do this IMS throws: std::bad_weak_ptr: bad_weak_ptr |
| auto lsaSegment = std::make_shared<const ndn::Data>(data); |
| m_lsaStorage.insert(*lsaSegment); |
| const ndn::Name& segmentName = lsaSegment->getName(); |
| // Schedule deletion of the segment |
| m_scheduler.schedule(ndn::time::seconds(LSA_REFRESH_TIME_DEFAULT), |
| [this, segmentName] { m_lsaStorage.erase(segmentName); }); |
| }); |
| |
| fetcher->onComplete.connect([=] (const ndn::ConstBufferPtr& bufferPtr) { |
| m_lsaStorage.erase(ndn::Name(lsaName).appendNumber(seqNo - 1)); |
| afterFetchLsa(bufferPtr, interestName); |
| m_fetchers.erase(it); |
| }); |
| |
| fetcher->onError.connect([=] (uint32_t errorCode, const std::string& msg) { |
| onFetchLsaError(errorCode, msg, interestName, timeoutCount, deadline, lsaName, seqNo); |
| m_fetchers.erase(it); |
| }); |
| |
| // increment a specific SENT_LSA_INTEREST |
| Lsa::Type lsaType; |
| std::istringstream(interestName[-2].toUri()) >> lsaType; |
| switch (lsaType) { |
| case Lsa::Type::ADJACENCY: |
| lsaIncrementSignal(Statistics::PacketType::SENT_ADJ_LSA_INTEREST); |
| break; |
| case Lsa::Type::COORDINATE: |
| lsaIncrementSignal(Statistics::PacketType::SENT_COORD_LSA_INTEREST); |
| break; |
| case Lsa::Type::NAME: |
| lsaIncrementSignal(Statistics::PacketType::SENT_NAME_LSA_INTEREST); |
| break; |
| default: |
| NLSR_LOG_ERROR("lsaType " << lsaType << " not recognized; failed Statistics::PacketType conversion"); |
| } |
| } |
| |
| void |
| Lsdb::processInterest(const ndn::Name& name, const ndn::Interest& interest) |
| { |
| ndn::Name interestName(interest.getName()); |
| NLSR_LOG_DEBUG("Interest received for LSA: " << interestName); |
| |
| if (interestName[-2].isVersion()) { |
| // Interest for particular segment |
| if (m_segmentPublisher.replyFromStore(interestName)) { |
| NLSR_LOG_TRACE("Reply from SegmentPublisher storage"); |
| return; |
| } |
| // Remove version and segment |
| interestName = interestName.getSubName(0, interestName.size() - 2); |
| NLSR_LOG_TRACE("Interest w/o segment and version: " << interestName); |
| } |
| |
| // increment RCV_LSA_INTEREST |
| lsaIncrementSignal(Statistics::PacketType::RCV_LSA_INTEREST); |
| |
| std::string chkString("LSA"); |
| int32_t lsaPosition = util::getNameComponentPosition(interestName, chkString); |
| |
| // Forms the name of the router that the Interest packet came from. |
| ndn::Name originRouter = m_confParam.getNetwork(); |
| originRouter.append(interestName.getSubName(lsaPosition + 1, |
| interestName.size() - lsaPosition - 3)); |
| |
| // if the interest is for this router's LSA |
| if (originRouter == m_confParam.getRouterPrefix() && lsaPosition >= 0) { |
| uint64_t seqNo = interestName[-1].toNumber(); |
| NLSR_LOG_DEBUG("LSA sequence number from interest: " << seqNo); |
| |
| std::string lsaType = interestName[-2].toUri(); |
| Lsa::Type interestedLsType; |
| std::istringstream(lsaType) >> interestedLsType; |
| |
| if (interestedLsType == Lsa::Type::NAME) { |
| processInterestForNameLsa(interest, originRouter.append(lsaType), seqNo); |
| } |
| else if (interestedLsType == Lsa::Type::ADJACENCY) { |
| processInterestForAdjacencyLsa(interest, originRouter.append(lsaType), seqNo); |
| } |
| else if (interestedLsType == Lsa::Type::COORDINATE) { |
| processInterestForCoordinateLsa(interest, originRouter.append(lsaType), seqNo); |
| } |
| else { |
| NLSR_LOG_WARN("Received unrecognized LSA type: " << interestedLsType); |
| } |
| lsaIncrementSignal(Statistics::PacketType::SENT_LSA_DATA); |
| } |
| else { // else the interest is for other router's lsa, serve from LsaSegmentStorage |
| std::shared_ptr<const ndn::Data> lsaSegment = m_lsaStorage.find(interest); |
| if (lsaSegment) { |
| NLSR_LOG_TRACE("Found data in lsa storage. Sending the data for " << interest.getName()); |
| m_face.put(*lsaSegment); |
| } |
| else { |
| NLSR_LOG_TRACE(interest << " was not found in this lsa storage."); |
| } |
| } |
| } |
| |
| // \brief Finds and sends a requested name LSA. |
| // \param interest The interest that seeks the name LSA. |
| // \param lsaKey The LSA that the Interest is seeking. |
| // \param seqNo A sequence number to ensure that we are sending the |
| // version that was requested. |
| void |
| Lsdb::processInterestForNameLsa(const ndn::Interest& interest, |
| const ndn::Name& lsaKey, |
| uint64_t seqNo) |
| { |
| // increment RCV_NAME_LSA_INTEREST |
| lsaIncrementSignal(Statistics::PacketType::RCV_NAME_LSA_INTEREST); |
| NLSR_LOG_DEBUG("nameLsa interest " << interest << " received"); |
| NameLsa* nameLsa = findNameLsa(lsaKey); |
| if (nameLsa != nullptr) { |
| NLSR_LOG_TRACE("Verifying SeqNo for NameLsa is same as requested."); |
| if (nameLsa->getLsSeqNo() == seqNo) { |
| std::string content = nameLsa->serialize(); |
| m_segmentPublisher.publish(interest.getName(), interest.getName(), |
| ndn::encoding::makeStringBlock(ndn::tlv::Content, content), |
| m_lsaRefreshTime, m_signingInfo); |
| |
| lsaIncrementSignal(Statistics::PacketType::SENT_NAME_LSA_DATA); |
| } |
| else { |
| NLSR_LOG_TRACE("SeqNo for nameLsa does not match"); |
| } |
| } |
| else { |
| NLSR_LOG_TRACE(interest << " was not found in this lsdb"); |
| } |
| } |
| |
| // \brief Finds and sends a requested adj. LSA. |
| // \param interest The interest that seeks the adj. LSA. |
| // \param lsaKey The LSA that the Interest is seeking. |
| // \param seqNo A sequence number to ensure that we are sending the |
| // version that was requested. |
| void |
| Lsdb::processInterestForAdjacencyLsa(const ndn::Interest& interest, |
| const ndn::Name& lsaKey, |
| uint64_t seqNo) |
| { |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_ON) { |
| NLSR_LOG_ERROR("Received interest for an adjacency LSA when hyperbolic routing is enabled"); |
| } |
| |
| lsaIncrementSignal(Statistics::PacketType::RCV_ADJ_LSA_INTEREST); |
| NLSR_LOG_DEBUG("AdjLsa interest " << interest << " received"); |
| AdjLsa* adjLsa = findAdjLsa(lsaKey); |
| if (adjLsa != nullptr) { |
| NLSR_LOG_TRACE("Verifying SeqNo for AdjLsa is same as requested."); |
| if (adjLsa->getLsSeqNo() == seqNo) { |
| std::string content = adjLsa->serialize(); |
| m_segmentPublisher.publish(interest.getName(), interest.getName(), |
| ndn::encoding::makeStringBlock(ndn::tlv::Content, content), |
| m_lsaRefreshTime, m_signingInfo); |
| |
| lsaIncrementSignal(Statistics::PacketType::SENT_ADJ_LSA_DATA); |
| } |
| else { |
| NLSR_LOG_TRACE("SeqNo for AdjLsa does not match"); |
| } |
| } |
| else { |
| NLSR_LOG_TRACE(interest << " was not found in this lsdb"); |
| } |
| } |
| |
| // \brief Finds and sends a requested cor. LSA. |
| // \param interest The interest that seeks the cor. LSA. |
| // \param lsaKey The LSA that the Interest is seeking. |
| // \param seqNo A sequence number to ensure that we are sending the |
| // version that was requested. |
| void |
| Lsdb::processInterestForCoordinateLsa(const ndn::Interest& interest, |
| const ndn::Name& lsaKey, |
| uint64_t seqNo) |
| { |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_OFF) { |
| NLSR_LOG_ERROR("Received Interest for a coordinate LSA when link-state routing is enabled"); |
| } |
| |
| lsaIncrementSignal(Statistics::PacketType::RCV_COORD_LSA_INTEREST); |
| NLSR_LOG_DEBUG("CoordinateLsa interest " << interest << " received"); |
| CoordinateLsa* corLsa = findCoordinateLsa(lsaKey); |
| if (corLsa != nullptr) { |
| NLSR_LOG_TRACE("Verifying SeqNo for CoordinateLsa is same as requested."); |
| if (corLsa->getLsSeqNo() == seqNo) { |
| std::string content = corLsa->serialize(); |
| m_segmentPublisher.publish(interest.getName(), interest.getName(), |
| ndn::encoding::makeStringBlock(ndn::tlv::Content, content), |
| m_lsaRefreshTime, m_signingInfo); |
| |
| lsaIncrementSignal(Statistics::PacketType::SENT_COORD_LSA_DATA); |
| } |
| else { |
| NLSR_LOG_TRACE("SeqNo for CoordinateLsa does not match"); |
| } |
| } |
| else { |
| NLSR_LOG_TRACE(interest << " was not found in this lsdb"); |
| } |
| } |
| |
| void |
| Lsdb::onContentValidated(const std::shared_ptr<const ndn::Data>& data) |
| { |
| const ndn::Name& dataName = data->getName(); |
| NLSR_LOG_DEBUG("Data validation successful for LSA: " << dataName); |
| |
| std::string chkString("LSA"); |
| int32_t lsaPosition = util::getNameComponentPosition(dataName, chkString); |
| |
| if (lsaPosition >= 0) { |
| |
| // Extracts the prefix of the originating router from the data. |
| ndn::Name originRouter = m_confParam.getNetwork(); |
| originRouter.append(dataName.getSubName(lsaPosition + 1, dataName.size() - lsaPosition - 3)); |
| |
| uint64_t seqNo = dataName[-1].toNumber(); |
| std::string dataContent(reinterpret_cast<const char*>(data->getContent().value()), |
| data->getContent().value_size()); |
| |
| Lsa::Type interestedLsType; |
| std::istringstream(dataName[-2].toUri()) >> interestedLsType; |
| |
| if (interestedLsType == Lsa::Type::NAME) { |
| processContentNameLsa(originRouter.append(std::to_string(interestedLsType)), seqNo, |
| dataContent); |
| } |
| else if (interestedLsType == Lsa::Type::ADJACENCY) { |
| processContentAdjacencyLsa(originRouter.append(std::to_string(interestedLsType)), seqNo, |
| dataContent); |
| } |
| else if (interestedLsType == Lsa::Type::COORDINATE) { |
| processContentCoordinateLsa(originRouter.append(std::to_string(interestedLsType)), seqNo, |
| dataContent); |
| } |
| else { |
| NLSR_LOG_WARN("Received unrecognized LSA Type: " << interestedLsType); |
| } |
| |
| lsaIncrementSignal(Statistics::PacketType::RCV_LSA_DATA); |
| } |
| } |
| |
| void |
| Lsdb::processContentNameLsa(const ndn::Name& lsaKey, |
| uint64_t lsSeqNo, std::string& dataContent) |
| { |
| lsaIncrementSignal(Statistics::PacketType::RCV_NAME_LSA_DATA); |
| if (isNameLsaNew(lsaKey, lsSeqNo)) { |
| NameLsa nameLsa; |
| if (nameLsa.deserialize(dataContent)) { |
| installNameLsa(nameLsa); |
| } |
| else { |
| NLSR_LOG_DEBUG("LSA data decoding error :("); |
| } |
| } |
| } |
| |
| void |
| Lsdb::processContentAdjacencyLsa(const ndn::Name& lsaKey, |
| uint64_t lsSeqNo, std::string& dataContent) |
| { |
| lsaIncrementSignal(Statistics::PacketType::RCV_ADJ_LSA_DATA); |
| if (isAdjLsaNew(lsaKey, lsSeqNo)) { |
| AdjLsa adjLsa; |
| if (adjLsa.deserialize(dataContent)) { |
| installAdjLsa(adjLsa); |
| } |
| else { |
| NLSR_LOG_DEBUG("LSA data decoding error :("); |
| } |
| } |
| } |
| |
| void |
| Lsdb::processContentCoordinateLsa(const ndn::Name& lsaKey, |
| uint64_t lsSeqNo, std::string& dataContent) |
| { |
| lsaIncrementSignal(Statistics::PacketType::RCV_COORD_LSA_DATA); |
| if (isCoordinateLsaNew(lsaKey, lsSeqNo)) { |
| CoordinateLsa corLsa; |
| if (corLsa.deserialize(dataContent)) { |
| installCoordinateLsa(corLsa); |
| } |
| else { |
| NLSR_LOG_DEBUG("LSA data decoding error :("); |
| } |
| } |
| } |
| |
| ndn::time::system_clock::TimePoint |
| Lsdb::getLsaExpirationTimePoint() |
| { |
| ndn::time::system_clock::TimePoint expirationTimePoint = ndn::time::system_clock::now(); |
| expirationTimePoint = expirationTimePoint + |
| ndn::time::seconds(m_confParam.getRouterDeadInterval()); |
| return expirationTimePoint; |
| } |
| |
| void |
| Lsdb::writeAdjLsdbLog() |
| { |
| if (m_confParam.getHyperbolicState() == HYPERBOLIC_STATE_ON) { |
| return; |
| } |
| |
| NLSR_LOG_DEBUG("---------------Adj LSDB-------------------"); |
| for (const auto& adj : m_adjLsdb) { |
| adj.writeLog(); |
| } |
| } |
| |
| //-----utility function ----- |
| bool |
| Lsdb::doesLsaExist(const ndn::Name& key, const Lsa::Type& lsType) |
| { |
| switch (lsType) { |
| case Lsa::Type::ADJACENCY: |
| return doesAdjLsaExist(key); |
| case Lsa::Type::COORDINATE: |
| return doesCoordinateLsaExist(key); |
| case Lsa::Type::NAME: |
| return doesNameLsaExist(key); |
| default: |
| return false; |
| } |
| } |
| |
| bool |
| Lsdb::isLsaNew(const ndn::Name& routerName, const Lsa::Type& lsaType, |
| const uint64_t& sequenceNumber) { |
| ndn::Name lsaKey = routerName; |
| lsaKey.append(std::to_string(lsaType)); |
| |
| switch (lsaType) { |
| case Lsa::Type::ADJACENCY: |
| return isAdjLsaNew(lsaKey, sequenceNumber); |
| case Lsa::Type::COORDINATE: |
| return isCoordinateLsaNew(lsaKey, sequenceNumber); |
| case Lsa::Type::NAME: |
| return isNameLsaNew(lsaKey, sequenceNumber); |
| default: |
| return false; |
| } |
| } |
| |
| } // namespace nlsr |