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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 <algorithm>
#include "LogFactory.h"
#include "Logger.h"
#include "RecoverableException.h"
#include "util.h"
#include "SocketCore.h"
#include "SimpleRandomizer.h"
#include "fmt.h"
namespace aria2 {
DHTConnectionImpl::DHTConnectionImpl(int family)
: socket_(std::make_shared<SocketCore>(SOCK_DGRAM)), family_(family)
{
}
DHTConnectionImpl::~DHTConnectionImpl() {}
bool DHTConnectionImpl::bind(uint16_t& port, const std::string& addr,
SegList<int>& sgl)
{
std::vector<uint16_t> ports;
while (sgl.hasNext()) {
ports.push_back(sgl.next());
}
std::shuffle(ports.begin(), ports.end(), *SimpleRandomizer::getInstance());
for (const auto& p : ports) {
port = p;
if (bind(port, addr)) {
return true;
}
}
return false;
}
bool DHTConnectionImpl::bind(uint16_t& port, const std::string& addr)
{
const int ipv = (family_ == AF_INET) ? 4 : 6;
try {
socket_->bind(addr.c_str(), port, family_);
socket_->setNonBlockingMode();
auto endpoint = socket_->getAddrInfo();
port = endpoint.port;
A2_LOG_NOTICE(fmt(_("IPv%d DHT: listening on UDP port %u"), ipv, port));
return true;
}
catch (RecoverableException& e) {
A2_LOG_ERROR_EX(fmt("IPv%d DHT: failed to bind UDP port %u", ipv, port), e);
}
return false;
}
ssize_t DHTConnectionImpl::receiveMessage(unsigned char* data, size_t len,
std::string& host, uint16_t& port)
{
Endpoint remoteEndpoint;
ssize_t length = socket_->readDataFrom(data, len, remoteEndpoint);
if (length == 0) {
return length;
}
host = remoteEndpoint.addr;
port = remoteEndpoint.port;
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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