mirror of https://github.com/aria2/aria2
112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 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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/* copyright --> */
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#include "DHTConnectionImpl.h"
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#include <utility>
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#include <algorithm>
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#include "LogFactory.h"
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#include "Logger.h"
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#include "RecoverableException.h"
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#include "util.h"
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#include "SocketCore.h"
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#include "SimpleRandomizer.h"
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#include "fmt.h"
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namespace aria2 {
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DHTConnectionImpl::DHTConnectionImpl(int family)
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: socket_(std::make_shared<SocketCore>(SOCK_DGRAM)), family_(family)
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{
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}
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DHTConnectionImpl::~DHTConnectionImpl() {}
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bool DHTConnectionImpl::bind(uint16_t& port, const std::string& addr,
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SegList<int>& sgl)
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{
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std::vector<uint16_t> ports;
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while (sgl.hasNext()) {
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ports.push_back(sgl.next());
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}
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std::shuffle(ports.begin(), ports.end(), *SimpleRandomizer::getInstance());
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for (const auto& p : ports) {
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port = p;
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if (bind(port, addr)) {
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return true;
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}
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}
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return false;
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}
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bool DHTConnectionImpl::bind(uint16_t& port, const std::string& addr)
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{
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const int ipv = (family_ == AF_INET) ? 4 : 6;
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try {
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socket_->bind(addr.c_str(), port, family_);
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socket_->setNonBlockingMode();
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auto endpoint = socket_->getAddrInfo();
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port = endpoint.port;
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A2_LOG_NOTICE(fmt(_("IPv%d DHT: listening on UDP port %u"), ipv, port));
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return true;
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}
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catch (RecoverableException& e) {
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A2_LOG_ERROR_EX(fmt("IPv%d DHT: failed to bind UDP port %u", ipv, port), e);
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}
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return false;
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}
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ssize_t DHTConnectionImpl::receiveMessage(unsigned char* data, size_t len,
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std::string& host, uint16_t& port)
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{
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Endpoint remoteEndpoint;
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ssize_t length = socket_->readDataFrom(data, len, remoteEndpoint);
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if (length == 0) {
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return length;
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}
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host = remoteEndpoint.addr;
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port = remoteEndpoint.port;
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return length;
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}
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ssize_t DHTConnectionImpl::sendMessage(const unsigned char* data, size_t len,
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const std::string& host, uint16_t port)
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{
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return socket_->writeData(data, len, host, port);
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}
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} // namespace aria2
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