Davide Pesavento
87 lines
3.3 KiB
C++
87 lines
3.3 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014-2018, Regents of the University of California,
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* Arizona Board of Regents,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University,
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* Washington University in St. Louis,
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* Beijing Institute of Technology,
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* The University of Memphis.
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*
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* This file is part of NFD (Named Data Networking Forwarding Daemon).
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* See AUTHORS.md for complete list of NFD authors and contributors.
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*
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* NFD is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "process-nack-traits.hpp"
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#include "core/logger.hpp"
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namespace nfd {
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namespace fw {
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NFD_LOG_INIT(ProcessNackTraits);
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void
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ProcessNackTraitsBase::processNack(const Face& inFace, const lp::Nack& nack,
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const shared_ptr<pit::Entry>& pitEntry)
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{
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int nOutRecordsNotNacked = 0;
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Face* lastFaceNotNacked = nullptr;
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lp::NackReason leastSevereReason = lp::NackReason::NONE;
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for (const pit::OutRecord& outR : pitEntry->getOutRecords()) {
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const lp::NackHeader* inNack = outR.getIncomingNack();
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if (inNack == nullptr) {
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++nOutRecordsNotNacked;
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lastFaceNotNacked = &outR.getFace();
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continue;
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}
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if (isLessSevere(inNack->getReason(), leastSevereReason)) {
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leastSevereReason = inNack->getReason();
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}
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}
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lp::NackHeader outNack;
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outNack.setReason(leastSevereReason);
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if (nOutRecordsNotNacked == 1) {
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BOOST_ASSERT(lastFaceNotNacked != nullptr);
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pit::InRecordCollection::iterator inR = pitEntry->getInRecord(*lastFaceNotNacked);
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if (inR != pitEntry->in_end()) {
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// one out-record not Nacked, which is also a downstream
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NFD_LOG_DEBUG(nack.getInterest() << " nack-from=" << inFace.getId() <<
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" nack=" << nack.getReason() <<
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" nack-to(bidirectional)=" << lastFaceNotNacked->getId() <<
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" out-nack=" << outNack.getReason());
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this->sendNackForProcessNackTraits(pitEntry, *lastFaceNotNacked, outNack);
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return;
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}
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}
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if (nOutRecordsNotNacked > 0) {
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NFD_LOG_DEBUG(nack.getInterest() << " nack-from=" << inFace.getId() <<
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" nack=" << nack.getReason() <<
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" waiting=" << nOutRecordsNotNacked);
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// continue waiting
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return;
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}
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NFD_LOG_DEBUG(nack.getInterest() << " nack-from=" << inFace.getId() <<
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" nack=" << nack.getReason() <<
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" nack-to=all out-nack=" << outNack.getReason());
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this->sendNacksForProcessNackTraits(pitEntry, outNack);
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}
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} // namespace fw
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} // namespace nfd
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