Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 1 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| 2 | /** |
Alexander Afanasyev | 319f2c8 | 2015-01-07 14:56:53 -0800 | [diff] [blame] | 3 | * Copyright (c) 2014-2015, Regents of the University of California, |
| 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. |
Alexander Afanasyev | 9bcbc7c | 2014-04-06 19:37:37 -0700 | [diff] [blame] | 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/>. |
Junxiao Shi | 5dd26c3 | 2014-07-20 23:15:14 -0700 | [diff] [blame] | 24 | */ |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 25 | |
| 26 | #include "udp-channel.hpp" |
| 27 | #include "core/global-io.hpp" |
| 28 | |
| 29 | namespace nfd { |
| 30 | |
| 31 | NFD_LOG_INIT("UdpChannel"); |
| 32 | |
| 33 | using namespace boost::asio; |
| 34 | |
| 35 | UdpChannel::UdpChannel(const udp::Endpoint& localEndpoint, |
Alexander Afanasyev | eb3197f | 2014-03-17 19:28:18 -0700 | [diff] [blame] | 36 | const time::seconds& timeout) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 37 | : m_localEndpoint(localEndpoint) |
| 38 | , m_isListening(false) |
Giulio Grassi | 69871f0 | 2014-03-09 16:14:44 +0100 | [diff] [blame] | 39 | , m_idleFaceTimeout(timeout) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 40 | { |
| 41 | /// \todo the reuse_address works as we want in Linux, but in other system could be different. |
| 42 | /// We need to check this |
| 43 | /// (SO_REUSEADDR doesn't behave uniformly in different OS) |
| 44 | |
Alexander Afanasyev | f698028 | 2014-05-13 18:28:40 -0700 | [diff] [blame] | 45 | m_socket = make_shared<ip::udp::socket>(ref(getGlobalIoService())); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 46 | m_socket->open(m_localEndpoint.protocol()); |
| 47 | m_socket->set_option(boost::asio::ip::udp::socket::reuse_address(true)); |
Alexander Afanasyev | eee71fd | 2014-03-13 17:40:33 -0700 | [diff] [blame] | 48 | if (m_localEndpoint.address().is_v6()) |
| 49 | { |
| 50 | m_socket->set_option(ip::v6_only(true)); |
| 51 | } |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 52 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 53 | try { |
| 54 | m_socket->bind(m_localEndpoint); |
| 55 | } |
| 56 | catch (boost::system::system_error& e) { |
| 57 | //The bind failed, so the socket is useless now |
| 58 | m_socket->close(); |
| 59 | throw Error("Failed to properly configure the socket. " |
| 60 | "UdpChannel creation aborted, check the address (" + std::string(e.what()) + ")"); |
| 61 | } |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 62 | |
Junxiao Shi | 61e3cc5 | 2014-03-03 20:40:28 -0700 | [diff] [blame] | 63 | this->setUri(FaceUri(localEndpoint)); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | void |
| 67 | UdpChannel::listen(const FaceCreatedCallback& onFaceCreated, |
| 68 | const ConnectFailedCallback& onListenFailed) |
| 69 | { |
| 70 | if (m_isListening) { |
| 71 | throw Error("Listen already called on this channel"); |
| 72 | } |
| 73 | m_isListening = true; |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 74 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 75 | onFaceCreatedNewPeerCallback = onFaceCreated; |
| 76 | onConnectFailedNewPeerCallback = onListenFailed; |
| 77 | |
Junxiao Shi | 39cd633 | 2014-11-06 21:53:18 -0700 | [diff] [blame] | 78 | m_socket->async_receive_from(boost::asio::buffer(m_inputBuffer, ndn::MAX_NDN_PACKET_SIZE), |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 79 | m_newRemoteEndpoint, |
| 80 | bind(&UdpChannel::newPeer, this, |
| 81 | boost::asio::placeholders::error, |
| 82 | boost::asio::placeholders::bytes_transferred)); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | void |
| 87 | UdpChannel::connect(const udp::Endpoint& remoteEndpoint, |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 88 | const FaceCreatedCallback& onFaceCreated, |
| 89 | const ConnectFailedCallback& onConnectFailed) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 90 | { |
| 91 | ChannelFaceMap::iterator i = m_channelFaces.find(remoteEndpoint); |
| 92 | if (i != m_channelFaces.end()) { |
Alexander Afanasyev | 355c066 | 2014-03-20 18:08:17 -0700 | [diff] [blame] | 93 | i->second->setOnDemand(false); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 94 | onFaceCreated(i->second); |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | //creating a new socket for the face that will be created soon |
| 99 | shared_ptr<ip::udp::socket> clientSocket = |
Alexander Afanasyev | f698028 | 2014-05-13 18:28:40 -0700 | [diff] [blame] | 100 | make_shared<ip::udp::socket>(ref(getGlobalIoService())); |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 101 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 102 | clientSocket->open(m_localEndpoint.protocol()); |
| 103 | clientSocket->set_option(ip::udp::socket::reuse_address(true)); |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 104 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 105 | try { |
| 106 | clientSocket->bind(m_localEndpoint); |
| 107 | clientSocket->connect(remoteEndpoint); //@todo connect or async_connect |
| 108 | //(since there is no handshake the connect shouldn't block). If we go for |
| 109 | //async_connect, make sure that if in the meantime we receive a UDP pkt from |
| 110 | //that endpoint nothing bad happen (it's difficult, but it could happen) |
| 111 | } |
| 112 | catch (boost::system::system_error& e) { |
| 113 | clientSocket->close(); |
Steve DiBenedetto | ca53ac6 | 2014-03-27 19:58:40 -0600 | [diff] [blame] | 114 | onConnectFailed("Failed to configure socket (" + std::string(e.what()) + ")"); |
| 115 | return; |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 116 | } |
Alexander Afanasyev | 355c066 | 2014-03-20 18:08:17 -0700 | [diff] [blame] | 117 | createFace(clientSocket, onFaceCreated, false); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 118 | } |
| 119 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 120 | size_t |
| 121 | UdpChannel::size() const |
| 122 | { |
| 123 | return m_channelFaces.size(); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | shared_ptr<UdpFace> |
| 128 | UdpChannel::createFace(const shared_ptr<ip::udp::socket>& socket, |
Giulio Grassi | 69871f0 | 2014-03-09 16:14:44 +0100 | [diff] [blame] | 129 | const FaceCreatedCallback& onFaceCreated, |
Alexander Afanasyev | 355c066 | 2014-03-20 18:08:17 -0700 | [diff] [blame] | 130 | bool isOnDemand) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 131 | { |
| 132 | udp::Endpoint remoteEndpoint = socket->remote_endpoint(); |
| 133 | |
Steve DiBenedetto | 2aa4eca | 2014-06-20 10:47:40 -0600 | [diff] [blame] | 134 | shared_ptr<UdpFace> face; |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 135 | |
Steve DiBenedetto | 2aa4eca | 2014-06-20 10:47:40 -0600 | [diff] [blame] | 136 | ChannelFaceMap::iterator faceMapPos = m_channelFaces.find(remoteEndpoint); |
| 137 | if (faceMapPos == m_channelFaces.end()) |
| 138 | { |
Alexander Afanasyev | e515f0a | 2014-06-30 15:28:10 -0700 | [diff] [blame] | 139 | face = make_shared<UdpFace>(socket, isOnDemand, m_idleFaceTimeout); |
Junxiao Shi | c099ddb | 2014-12-25 20:53:20 -0700 | [diff] [blame] | 140 | |
| 141 | face->onFail.connectSingleShot(bind(&UdpChannel::afterFaceFailed, this, remoteEndpoint)); |
Steve DiBenedetto | 2aa4eca | 2014-06-20 10:47:40 -0600 | [diff] [blame] | 142 | |
| 143 | m_channelFaces[remoteEndpoint] = face; |
| 144 | } |
| 145 | else |
| 146 | { |
| 147 | // we've already created a a face for this endpoint, just reuse it |
| 148 | face = faceMapPos->second; |
| 149 | |
| 150 | boost::system::error_code error; |
| 151 | socket->shutdown(ip::udp::socket::shutdown_both, error); |
| 152 | socket->close(error); |
| 153 | } |
| 154 | |
| 155 | // Need to invoke the callback regardless of whether or not we have already created |
| 156 | // the face so that control responses and such can be sent. |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 157 | onFaceCreated(face); |
Steve DiBenedetto | 2aa4eca | 2014-06-20 10:47:40 -0600 | [diff] [blame] | 158 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 159 | return face; |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | UdpChannel::newPeer(const boost::system::error_code& error, |
Junxiao Shi | 5dd26c3 | 2014-07-20 23:15:14 -0700 | [diff] [blame] | 164 | size_t nBytesReceived) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 165 | { |
| 166 | NFD_LOG_DEBUG("UdpChannel::newPeer from " << m_newRemoteEndpoint); |
Alexander Afanasyev | 6f5ff63 | 2014-03-07 16:40:10 +0000 | [diff] [blame] | 167 | |
| 168 | shared_ptr<UdpFace> face; |
| 169 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 170 | ChannelFaceMap::iterator i = m_channelFaces.find(m_newRemoteEndpoint); |
| 171 | if (i != m_channelFaces.end()) { |
| 172 | //The face already exists. |
| 173 | //Usually this shouldn't happen, because the channel creates a Udpface |
| 174 | //as soon as it receives a pkt from a new endpoint and then the |
| 175 | //traffic is dispatched by the kernel directly to the face. |
| 176 | //However, if the node receives multiple packets from the same endpoint |
| 177 | //"at the same time", while the channel is creating the face the kernel |
| 178 | //could dispatch the other pkts to the channel because the face is not yet |
| 179 | //ready. In this case, the channel has to pass the pkt to the face |
Alexander Afanasyev | 6f5ff63 | 2014-03-07 16:40:10 +0000 | [diff] [blame] | 180 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 181 | NFD_LOG_DEBUG("The creation of the face for the remote endpoint " |
| 182 | << m_newRemoteEndpoint |
| 183 | << " is in progress"); |
Alexander Afanasyev | 6f5ff63 | 2014-03-07 16:40:10 +0000 | [diff] [blame] | 184 | |
| 185 | face = i->second; |
| 186 | } |
| 187 | else { |
| 188 | shared_ptr<ip::udp::socket> clientSocket = |
Alexander Afanasyev | f698028 | 2014-05-13 18:28:40 -0700 | [diff] [blame] | 189 | make_shared<ip::udp::socket>(ref(getGlobalIoService())); |
Alexander Afanasyev | 6f5ff63 | 2014-03-07 16:40:10 +0000 | [diff] [blame] | 190 | clientSocket->open(m_localEndpoint.protocol()); |
| 191 | clientSocket->set_option(ip::udp::socket::reuse_address(true)); |
| 192 | clientSocket->bind(m_localEndpoint); |
Alexander Afanasyev | c5173de | 2014-12-18 10:51:35 -0800 | [diff] [blame] | 193 | boost::system::error_code ec; |
| 194 | clientSocket->connect(m_newRemoteEndpoint, ec); |
| 195 | if (ec) { |
| 196 | NFD_LOG_WARN("Error while creating on-demand UDP face from " << m_newRemoteEndpoint << ": " |
| 197 | << boost::system::system_error(ec).what()); |
| 198 | return; |
| 199 | } |
Alexander Afanasyev | 6f5ff63 | 2014-03-07 16:40:10 +0000 | [diff] [blame] | 200 | |
Giulio Grassi | 69871f0 | 2014-03-09 16:14:44 +0100 | [diff] [blame] | 201 | face = createFace(clientSocket, |
| 202 | onFaceCreatedNewPeerCallback, |
Alexander Afanasyev | 355c066 | 2014-03-20 18:08:17 -0700 | [diff] [blame] | 203 | true); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 204 | } |
| 205 | |
Davide Pesavento | a753058 | 2014-06-30 20:45:52 +0200 | [diff] [blame] | 206 | // dispatch the datagram to the face for processing |
| 207 | face->receiveDatagram(m_inputBuffer, nBytesReceived, error); |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 208 | |
Junxiao Shi | 39cd633 | 2014-11-06 21:53:18 -0700 | [diff] [blame] | 209 | m_socket->async_receive_from(boost::asio::buffer(m_inputBuffer, ndn::MAX_NDN_PACKET_SIZE), |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 210 | m_newRemoteEndpoint, |
| 211 | bind(&UdpChannel::newPeer, this, |
| 212 | boost::asio::placeholders::error, |
| 213 | boost::asio::placeholders::bytes_transferred)); |
| 214 | } |
| 215 | |
| 216 | |
Giulio Grassi | 69871f0 | 2014-03-09 16:14:44 +0100 | [diff] [blame] | 217 | void |
| 218 | UdpChannel::afterFaceFailed(udp::Endpoint &endpoint) |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 219 | { |
| 220 | NFD_LOG_DEBUG("afterFaceFailed: " << endpoint); |
| 221 | m_channelFaces.erase(endpoint); |
| 222 | } |
| 223 | |
Giulio Grassi | 624f6c6 | 2014-02-18 19:42:14 +0100 | [diff] [blame] | 224 | } // namespace nfd |