mirror of https://github.com/aria2/aria2
116 lines
4.1 KiB
C++
116 lines
4.1 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 "LpdMessageReceiver.h"
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#include "SocketCore.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "HttpHeaderProcessor.h"
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#include "HttpHeader.h"
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#include "util.h"
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#include "LpdMessage.h"
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#include "RecoverableException.h"
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namespace aria2 {
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LpdMessageReceiver::LpdMessageReceiver
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(const std::string& multicastAddress, uint16_t multicastPort):
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_multicastAddress(multicastAddress),
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_multicastPort(multicastPort),
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_logger(LogFactory::getInstance()) {}
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bool LpdMessageReceiver::init(const std::string& localAddr)
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{
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try {
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_socket.reset(new SocketCore(SOCK_DGRAM));
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_socket->bind(_multicastAddress, _multicastPort);
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if(_logger->debug()) {
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_logger->debug("Joining multicast group. %s:%u, localAddr=%s",
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_multicastAddress.c_str(), _multicastPort,
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localAddr.c_str());
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}
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_socket->joinMulticastGroup(_multicastAddress, _multicastPort, localAddr);
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_socket->setNonBlockingMode();
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_localAddress = localAddr;
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_logger->info("Listening multicast group (%s:%u) packet",
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_multicastAddress.c_str(), _multicastPort);
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return true;
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} catch(RecoverableException& e) {
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_logger->error("Failed to initialize LPD message receiver.", e);
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}
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return false;
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}
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SharedHandle<LpdMessage> LpdMessageReceiver::receiveMessage()
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{
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SharedHandle<LpdMessage> msg;
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try {
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unsigned char buf[200];
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std::pair<std::string, uint16_t> peerAddr;
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ssize_t length = _socket->readDataFrom(buf, sizeof(buf), peerAddr);
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if(length == 0) {
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return msg;
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}
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HttpHeaderProcessor proc;
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proc.update(buf, length);
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if(!proc.eoh()) {
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msg.reset(new LpdMessage());
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return msg;
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}
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SharedHandle<HttpHeader> header = proc.getHttpRequestHeader();
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std::string infoHashString = header->getFirst("Infohash");
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uint16_t port = header->getFirstAsUInt("Port");
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_logger->info("LPD message received infohash=%s, port=%u from %s",
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infoHashString.c_str(), port, peerAddr.first.c_str());
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std::string infoHash;
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if(infoHashString.size() != 40 ||
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(infoHash = util::fromHex(infoHashString)).empty() ||
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port == 0) {
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_logger->info("LPD bad request. infohash=%s", infoHashString.c_str());
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msg.reset(new LpdMessage());
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return msg;
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}
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SharedHandle<Peer> peer(new Peer(peerAddr.first, port, false));
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if(util::inPrivateAddress(peerAddr.first)) {
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peer->setLocalPeer(true);
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}
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msg.reset(new LpdMessage(peer, infoHash));
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return msg;
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} catch(RecoverableException& e) {
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_logger->info("Failed to receive LPD message.", e);
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msg.reset(new LpdMessage());
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return msg;
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}
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}
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} // namespace aria2
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