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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 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.
*/
/* copyright --> */
#include "DHTConnectionImpl.h"
#include <utility>
#include <deque>
#include <algorithm>
#include "LogFactory.h"
#include "Logger.h"
#include "RecoverableException.h"
#include "Util.h"
#include "Socket.h"
#include "SimpleRandomizer.h"
namespace aria2 {
DHTConnectionImpl::DHTConnectionImpl():_socket(new SocketCore(SOCK_DGRAM)),
_logger(LogFactory::getInstance()) {}
DHTConnectionImpl::~DHTConnectionImpl() {}
bool DHTConnectionImpl::bind(uint16_t& port, IntSequence& ports)
{
std::deque<int32_t> randPorts = ports.flush();
std::random_shuffle(randPorts.begin(), randPorts.end(),
*SimpleRandomizer::getInstance().get());
for(std::deque<int32_t>::const_iterator portItr = randPorts.begin();
portItr != randPorts.end(); ++portItr) {
if(!(0 < (*portItr) && (*portItr) <= 65535)) {
continue;
}
port = (*portItr);
if(bind(port)) {
return true;
}
}
return false;
}
bool DHTConnectionImpl::bind(uint16_t& port)
{
try {
_socket->bind(port);
_socket->setNonBlockingMode();
std::pair<std::string, uint16_t> svaddr;
_socket->getAddrInfo(svaddr);
port = svaddr.second;
_logger->info("Bind socket for DHT. port=%u", port);
return true;
} catch(RecoverableException& e) {
_logger->error("Failed to bind for DHT. port=%u", e, port);
}
return false;
}
ssize_t DHTConnectionImpl::receiveMessage(unsigned char* data, size_t len,
std::string& host, uint16_t& port)
{
std::pair<std::string, uint16_t> remoteHost;
ssize_t length = _socket->readDataFrom(data, len, remoteHost);
if(length == 0) {
return length;
} else {
host = remoteHost.first;
port = remoteHost.second;
return length;
}
}
ssize_t DHTConnectionImpl::sendMessage(const unsigned char* data, size_t len,
const std::string& host, uint16_t port)
{
return _socket->writeData(data, len, host, port);
}
} // namespace aria2
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