Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 1 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 2 | /* |
Davide Pesavento | 19779d8 | 2019-02-14 13:40:04 -0500 | [diff] [blame] | 3 | * Copyright (c) 2014-2019, Regents of the University of California, |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 4 | * Arizona Board of Regents, |
| 5 | * Colorado State University, |
| 6 | * University Pierre & Marie Curie, Sorbonne University, |
| 7 | * Washington University in St. Louis, |
| 8 | * Beijing Institute of Technology, |
| 9 | * The University of Memphis. |
| 10 | * |
| 11 | * This file is part of NFD (Named Data Networking Forwarding Daemon). |
| 12 | * See AUTHORS.md for complete list of NFD authors and contributors. |
| 13 | * |
| 14 | * NFD is free software: you can redistribute it and/or modify it under the terms |
| 15 | * of the GNU General Public License as published by the Free Software Foundation, |
| 16 | * either version 3 of the License, or (at your option) any later version. |
| 17 | * |
| 18 | * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| 19 | * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 20 | * PURPOSE. See the GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along with |
| 23 | * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | #include "multicast-strategy.hpp" |
Junxiao Shi | 00dc914 | 2016-11-21 14:23:12 +0000 | [diff] [blame] | 27 | #include "algorithm.hpp" |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 28 | #include "core/logger.hpp" |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 29 | |
| 30 | namespace nfd { |
| 31 | namespace fw { |
| 32 | |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 33 | NFD_REGISTER_STRATEGY(MulticastStrategy); |
| 34 | |
Davide Pesavento | a314808 | 2018-04-12 18:21:54 -0400 | [diff] [blame] | 35 | NFD_LOG_INIT(MulticastStrategy); |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 36 | |
Ashlesh Gawande | ecdbe5f | 2017-03-04 03:08:24 +0000 | [diff] [blame] | 37 | const time::milliseconds MulticastStrategy::RETX_SUPPRESSION_INITIAL(10); |
| 38 | const time::milliseconds MulticastStrategy::RETX_SUPPRESSION_MAX(250); |
| 39 | |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 40 | MulticastStrategy::MulticastStrategy(Forwarder& forwarder, const Name& name) |
Junxiao Shi | 18739c4 | 2016-12-22 08:03:00 +0000 | [diff] [blame] | 41 | : Strategy(forwarder) |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 42 | , ProcessNackTraits(this) |
Ashlesh Gawande | ecdbe5f | 2017-03-04 03:08:24 +0000 | [diff] [blame] | 43 | , m_retxSuppression(RETX_SUPPRESSION_INITIAL, |
| 44 | RetxSuppressionExponential::DEFAULT_MULTIPLIER, |
| 45 | RETX_SUPPRESSION_MAX) |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 46 | { |
Junxiao Shi | 18739c4 | 2016-12-22 08:03:00 +0000 | [diff] [blame] | 47 | ParsedInstanceName parsed = parseInstanceName(name); |
| 48 | if (!parsed.parameters.empty()) { |
Davide Pesavento | 19779d8 | 2019-02-14 13:40:04 -0500 | [diff] [blame] | 49 | NDN_THROW(std::invalid_argument("MulticastStrategy does not accept parameters")); |
Junxiao Shi | 18739c4 | 2016-12-22 08:03:00 +0000 | [diff] [blame] | 50 | } |
Junxiao Shi | 91f6ee0 | 2016-12-29 21:44:44 +0000 | [diff] [blame] | 51 | if (parsed.version && *parsed.version != getStrategyName()[-1].toVersion()) { |
Davide Pesavento | 19779d8 | 2019-02-14 13:40:04 -0500 | [diff] [blame] | 52 | NDN_THROW(std::invalid_argument( |
Alexander Afanasyev | 0c63c63 | 2017-12-05 11:17:09 -0500 | [diff] [blame] | 53 | "MulticastStrategy does not support version " + to_string(*parsed.version))); |
Junxiao Shi | 91f6ee0 | 2016-12-29 21:44:44 +0000 | [diff] [blame] | 54 | } |
Junxiao Shi | 18739c4 | 2016-12-22 08:03:00 +0000 | [diff] [blame] | 55 | this->setInstanceName(makeInstanceName(name, getStrategyName())); |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Junxiao Shi | 037f4ab | 2016-12-13 04:27:06 +0000 | [diff] [blame] | 58 | const Name& |
| 59 | MulticastStrategy::getStrategyName() |
| 60 | { |
Teng Liang | f995f38 | 2017-04-04 22:09:39 +0000 | [diff] [blame] | 61 | static Name strategyName("/localhost/nfd/strategy/multicast/%FD%03"); |
Junxiao Shi | 037f4ab | 2016-12-13 04:27:06 +0000 | [diff] [blame] | 62 | return strategyName; |
| 63 | } |
| 64 | |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 65 | void |
Junxiao Shi | 15e98b0 | 2016-08-12 11:21:44 +0000 | [diff] [blame] | 66 | MulticastStrategy::afterReceiveInterest(const Face& inFace, const Interest& interest, |
| 67 | const shared_ptr<pit::Entry>& pitEntry) |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 68 | { |
Junxiao Shi | 8d84314 | 2016-07-11 22:42:42 +0000 | [diff] [blame] | 69 | const fib::Entry& fibEntry = this->lookupFib(*pitEntry); |
| 70 | const fib::NextHopList& nexthops = fibEntry.getNextHops(); |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 71 | |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 72 | int nEligibleNextHops = 0; |
| 73 | |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 74 | bool isSuppressed = false; |
| 75 | |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 76 | for (const auto& nexthop : nexthops) { |
| 77 | Face& outFace = nexthop.getFace(); |
| 78 | |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 79 | RetxSuppressionResult suppressResult = m_retxSuppression.decidePerUpstream(*pitEntry, outFace); |
| 80 | |
| 81 | if (suppressResult == RetxSuppressionResult::SUPPRESS) { |
| 82 | NFD_LOG_DEBUG(interest << " from=" << inFace.getId() |
| 83 | << "to=" << outFace.getId() << " suppressed"); |
| 84 | isSuppressed = true; |
| 85 | continue; |
| 86 | } |
| 87 | |
Teng Liang | f995f38 | 2017-04-04 22:09:39 +0000 | [diff] [blame] | 88 | if ((outFace.getId() == inFace.getId() && outFace.getLinkType() != ndn::nfd::LINK_TYPE_AD_HOC) || |
| 89 | wouldViolateScope(inFace, interest, outFace)) { |
| 90 | continue; |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 91 | } |
Teng Liang | f995f38 | 2017-04-04 22:09:39 +0000 | [diff] [blame] | 92 | |
| 93 | this->sendInterest(pitEntry, outFace, interest); |
| 94 | NFD_LOG_DEBUG(interest << " from=" << inFace.getId() |
| 95 | << " pitEntry-to=" << outFace.getId()); |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 96 | |
| 97 | if (suppressResult == RetxSuppressionResult::FORWARD) { |
| 98 | m_retxSuppression.incrementIntervalForOutRecord(*pitEntry->getOutRecord(outFace)); |
| 99 | } |
Teng Liang | f995f38 | 2017-04-04 22:09:39 +0000 | [diff] [blame] | 100 | ++nEligibleNextHops; |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 103 | if (nEligibleNextHops == 0 && !isSuppressed) { |
| 104 | NFD_LOG_DEBUG(interest << " from=" << inFace.getId() << " noNextHop"); |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 105 | |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 106 | lp::NackHeader nackHeader; |
| 107 | nackHeader.setReason(lp::NackReason::NO_ROUTE); |
| 108 | this->sendNack(pitEntry, inFace, nackHeader); |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 109 | |
Ashlesh Gawande | 9001599 | 2017-07-11 17:25:48 -0500 | [diff] [blame] | 110 | this->rejectPendingInterest(pitEntry); |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 111 | } |
| 112 | } |
| 113 | |
Ashlesh Gawande | e38e261 | 2017-02-25 07:23:41 +0000 | [diff] [blame] | 114 | void |
| 115 | MulticastStrategy::afterReceiveNack(const Face& inFace, const lp::Nack& nack, |
| 116 | const shared_ptr<pit::Entry>& pitEntry) |
| 117 | { |
| 118 | this->processNack(inFace, nack, pitEntry); |
| 119 | } |
| 120 | |
Junxiao Shi | 67ba8d2 | 2015-08-21 21:21:28 -0700 | [diff] [blame] | 121 | } // namespace fw |
| 122 | } // namespace nfd |