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/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#include "LpdMessageDispatcher.h"
#include "SocketCore.h"
#include "A2STR.h"
#include "util.h"
#include "Logger.h"
#include "LogFactory.h"
#include "BtConstants.h"
#include "RecoverableException.h"
#include "wallclock.h"
#include "fmt.h"
namespace aria2 {
LpdMessageDispatcher::LpdMessageDispatcher(const std::string& infoHash,
uint16_t port,
const std::string& multicastAddress,
uint16_t multicastPort,
std::chrono::seconds interval)
: infoHash_(infoHash),
port_(port),
multicastAddress_(multicastAddress),
multicastPort_(multicastPort),
timer_(Timer::zero()),
interval_(std::move(interval)),
request_(bittorrent::createLpdRequest(multicastAddress_, multicastPort_,
infoHash_, port_))
{
}
LpdMessageDispatcher::~LpdMessageDispatcher() {}
bool LpdMessageDispatcher::init(const std::string& localAddr, unsigned char ttl,
unsigned char loop)
{
try {
socket_ = std::make_shared<SocketCore>(SOCK_DGRAM);
socket_->create(AF_INET);
A2_LOG_DEBUG(
fmt("Setting multicast outgoing interface=%s", localAddr.c_str()));
socket_->setMulticastInterface(localAddr);
A2_LOG_DEBUG(
fmt("Setting multicast ttl=%u", static_cast<unsigned int>(ttl)));
socket_->setMulticastTtl(ttl);
A2_LOG_DEBUG(
fmt("Setting multicast loop=%u", static_cast<unsigned int>(loop)));
socket_->setMulticastLoop(loop);
return true;
}
catch (RecoverableException& e) {
A2_LOG_ERROR_EX("Failed to initialize LpdMessageDispatcher.", e);
}
return false;
}
bool LpdMessageDispatcher::sendMessage()
{
return socket_->writeData(request_.c_str(), request_.size(),
multicastAddress_,
multicastPort_) == (ssize_t)request_.size();
}
bool LpdMessageDispatcher::isAnnounceReady() const
{
return timer_.difference(global::wallclock()) >= interval_;
}
void LpdMessageDispatcher::resetAnnounceTimer()
{
timer_ = global::wallclock();
}
namespace bittorrent {
std::string createLpdRequest(const std::string& multicastAddress,
uint16_t multicastPort,
const std::string& infoHash, uint16_t port)
{
return fmt("BT-SEARCH * HTTP/1.1\r\n"
"Host: %s:%u\r\n"
"Port: %u\r\n"
"Infohash: %s\r\n"
"\r\n\r\n",
multicastAddress.c_str(), multicastPort, port,
util::toHex(infoHash).c_str());
}
} // namespace bittorrent
} // namespac aria2
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