mirror of https://github.com/aria2/aria2
130 lines
4.2 KiB
C++
130 lines
4.2 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "PeerListenCommand.h"
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#include <utility>
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#include <algorithm>
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#include "DownloadEngine.h"
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#include "Peer.h"
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#include "RequestGroupMan.h"
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#include "RecoverableException.h"
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#include "message.h"
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#include "ReceiverMSEHandshakeCommand.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "SocketCore.h"
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#include "SimpleRandomizer.h"
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#include "util.h"
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#include "fmt.h"
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namespace aria2 {
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PeerListenCommand::PeerListenCommand(cuid_t cuid, DownloadEngine* e, int family)
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: Command(cuid), e_(e), family_(family)
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{
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}
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PeerListenCommand::~PeerListenCommand() = default;
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bool PeerListenCommand::bindPort(uint16_t& port, SegList<int>& sgl)
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{
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socket_ = std::make_shared<SocketCore>();
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std::vector<uint16_t> ports;
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while (sgl.hasNext()) {
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ports.push_back(sgl.next());
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}
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std::shuffle(ports.begin(), ports.end(), *SimpleRandomizer::getInstance());
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const int ipv = (family_ == AF_INET) ? 4 : 6;
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for (std::vector<uint16_t>::const_iterator i = ports.begin(),
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eoi = ports.end();
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i != eoi; ++i) {
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port = *i;
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try {
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socket_->bind(nullptr, port, family_);
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socket_->beginListen();
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A2_LOG_NOTICE(
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fmt(_("IPv%d BitTorrent: listening on TCP port %u"), ipv, port));
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return true;
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}
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catch (RecoverableException& ex) {
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A2_LOG_ERROR_EX(
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fmt("IPv%d BitTorrent: failed to bind TCP port %u", ipv, port), ex);
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socket_->closeConnection();
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}
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}
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return false;
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}
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uint16_t PeerListenCommand::getPort() const
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{
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if (!socket_) {
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return 0;
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}
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return socket_->getAddrInfo().port;
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}
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bool PeerListenCommand::execute()
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{
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if (e_->isHaltRequested() || e_->getRequestGroupMan()->downloadFinished()) {
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return true;
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}
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for (int i = 0; i < 3 && socket_->isReadable(0); ++i) {
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std::shared_ptr<SocketCore> peerSocket;
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try {
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peerSocket = socket_->acceptConnection();
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peerSocket->applyIpDscp();
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auto endpoint = peerSocket->getPeerInfo();
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auto peer = std::make_shared<Peer>(endpoint.addr, endpoint.port, true);
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cuid_t cuid = e_->newCUID();
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e_->addCommand(
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make_unique<ReceiverMSEHandshakeCommand>(cuid, peer, e_, peerSocket));
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A2_LOG_DEBUG(fmt("Accepted the connection from %s:%u.",
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peer->getIPAddress().c_str(), peer->getPort()));
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A2_LOG_DEBUG(fmt(
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"Added CUID#%" PRId64 " to receive BitTorrent/MSE handshake.", cuid));
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}
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catch (RecoverableException& ex) {
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A2_LOG_DEBUG_EX(fmt(MSG_ACCEPT_FAILURE, getCuid()), ex);
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}
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}
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e_->addCommand(std::unique_ptr<Command>(this));
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return false;
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}
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} // namespace aria2
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