mirror of https://github.com/aria2/aria2
122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2010 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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#include "LpdMessageDispatcher.h"
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#include "SocketCore.h"
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#include "A2STR.h"
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#include "util.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "BtConstants.h"
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#include "RecoverableException.h"
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#include "wallclock.h"
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namespace aria2 {
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LpdMessageDispatcher::LpdMessageDispatcher
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(const std::string& infoHash, uint16_t port,
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const std::string& multicastAddress, uint16_t multicastPort,
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time_t interval):
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_infoHash(infoHash),
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_port(port),
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_multicastAddress(multicastAddress),
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_multicastPort(multicastPort),
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_timer(0),
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_interval(interval),
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_request(bittorrent::createLpdRequest(_multicastAddress, _multicastPort,
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_infoHash, _port)),
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_logger(LogFactory::getInstance()) {}
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bool LpdMessageDispatcher::init(const std::string& localAddr,
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unsigned char ttl, unsigned char loop)
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{
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try {
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_socket.reset(new SocketCore(SOCK_DGRAM));
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_socket->create(AF_INET);
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if(_logger->debug()) {
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_logger->debug("Setting multicast outgoing interface=%s",
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localAddr.c_str());
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}
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_socket->setMulticastInterface(localAddr);
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if(_logger->debug()) {
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_logger->debug("Setting multicast ttl=%u",static_cast<unsigned int>(ttl));
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}
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_socket->setMulticastTtl(ttl);
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if(_logger->debug()) {
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_logger->debug("Setting multicast loop=%u",
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static_cast<unsigned int>(loop));
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}
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_socket->setMulticastLoop(loop);
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return true;
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} catch(RecoverableException& e) {
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_logger->error("Failed to initialize LpdMessageDispatcher.", e);
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}
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return false;
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}
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bool LpdMessageDispatcher::sendMessage()
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{
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return
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_socket->writeData(_request.c_str(), _request.size(),
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_multicastAddress, _multicastPort)
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== (ssize_t)_request.size();
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}
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bool LpdMessageDispatcher::isAnnounceReady() const
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{
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return _timer.difference(global::wallclock) >= _interval;
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}
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void LpdMessageDispatcher::resetAnnounceTimer()
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{
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_timer = global::wallclock;
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}
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namespace bittorrent {
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std::string createLpdRequest
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(const std::string& multicastAddress, uint16_t multicastPort,
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const std::string& infoHash, uint16_t port)
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{
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std::string req = "BT-SEARCH * HTTP/1.1\r\n";
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strappend(req, "Host: ", multicastAddress, A2STR::COLON_C,
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util::uitos(multicastPort), A2STR::CRLF);
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strappend(req, "Port: ", util::uitos(port), A2STR::CRLF);
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strappend(req, "Infohash: ", util::toHex(infoHash), A2STR::CRLF);
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req += "\r\n\r\n";
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return req;
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}
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} // namespace bittorrent
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} // namespac aria2
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