mirror of https://github.com/aria2/aria2
227 lines
6.9 KiB
C++
227 lines
6.9 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 "DHTEntryPointNameResolveCommand.h"
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#include "DownloadEngine.h"
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#include "NameResolver.h"
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#include "DlAbortEx.h"
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#include "prefs.h"
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#include "message.h"
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#include "util.h"
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#include "Option.h"
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#include "DHTNode.h"
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#include "DHTTaskQueue.h"
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#include "DHTTaskFactory.h"
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#include "DHTRoutingTable.h"
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#include "DHTTask.h"
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#include "RequestGroupMan.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "fmt.h"
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#include "SocketCore.h"
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#ifdef ENABLE_ASYNC_DNS
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#include "AsyncNameResolverMan.h"
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#endif // ENABLE_ASYNC_DNS
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namespace aria2 {
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DHTEntryPointNameResolveCommand::DHTEntryPointNameResolveCommand
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(cuid_t cuid, DownloadEngine* e,
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const std::vector<std::pair<std::string, uint16_t> >& entryPoints)
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: Command{cuid},
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e_{e},
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#ifdef ENABLE_ASYNC_DNS
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asyncNameResolverMan_{make_unique<AsyncNameResolverMan>()},
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#endif // ENABLE_ASYNC_DNS
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taskQueue_{nullptr},
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taskFactory_{nullptr},
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routingTable_{nullptr},
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entryPoints_(std::begin(entryPoints), std::end(entryPoints)),
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numSuccess_{0},
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bootstrapEnabled_{false}
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{
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#ifdef ENABLE_ASYNC_DNS
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configureAsyncNameResolverMan(asyncNameResolverMan_.get(), e_->getOption());
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#endif // ENABLE_ASYNC_DNS
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}
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DHTEntryPointNameResolveCommand::~DHTEntryPointNameResolveCommand()
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{
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#ifdef ENABLE_ASYNC_DNS
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asyncNameResolverMan_->disableNameResolverCheck(e_, this);
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#endif // ENABLE_ASYNC_DNS
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}
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bool DHTEntryPointNameResolveCommand::execute()
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{
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if(e_->getRequestGroupMan()->downloadFinished() || e_->isHaltRequested()) {
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return true;
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}
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try {
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#ifdef ENABLE_ASYNC_DNS
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if(e_->getOption()->getAsBool(PREF_ASYNC_DNS)) {
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while(!entryPoints_.empty()) {
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std::string hostname = entryPoints_.front().first;
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if(util::isNumericHost(hostname)) {
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++numSuccess_;
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std::pair<std::string, uint16_t> p(hostname,
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entryPoints_.front().second);
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addPingTask(p);
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} else {
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std::vector<std::string> res;
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int rv = resolveHostname(res, hostname);
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if(rv == 0) {
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e_->addCommand(std::unique_ptr<Command>(this));
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return false;
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} else {
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if(rv == 1) {
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++numSuccess_;
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std::pair<std::string, uint16_t> p
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(res.front(), entryPoints_.front().second);
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addPingTask(p);
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}
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asyncNameResolverMan_->reset(e_, this);
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}
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}
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entryPoints_.pop_front();
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}
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} else
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#endif // ENABLE_ASYNC_DNS
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{
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NameResolver res;
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res.setSocktype(SOCK_DGRAM);
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while(!entryPoints_.empty()) {
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std::string hostname = entryPoints_.front().first;
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try {
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std::vector<std::string> addrs;
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res.resolve(addrs, hostname);
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++numSuccess_;
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std::pair<std::string, uint16_t> p(addrs.front(),
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entryPoints_.front().second);
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addPingTask(p);
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} catch(RecoverableException& e) {
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A2_LOG_ERROR_EX(EX_EXCEPTION_CAUGHT, e);
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}
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entryPoints_.pop_front();
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}
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}
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if(bootstrapEnabled_ && numSuccess_) {
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taskQueue_->addPeriodicTask1(taskFactory_->createNodeLookupTask
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(localNode_->getID()));
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taskQueue_->addPeriodicTask1(taskFactory_->createBucketRefreshTask());
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}
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} catch(RecoverableException& e) {
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A2_LOG_ERROR_EX(EX_EXCEPTION_CAUGHT, e);
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}
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return true;
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}
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void DHTEntryPointNameResolveCommand::addPingTask
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(const std::pair<std::string, uint16_t>& addr)
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{
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std::shared_ptr<DHTNode> entryNode(new DHTNode());
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entryNode->setIPAddress(addr.first);
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entryNode->setPort(addr.second);
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taskQueue_->addPeriodicTask1(taskFactory_->createPingTask(entryNode, 10));
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}
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#ifdef ENABLE_ASYNC_DNS
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int DHTEntryPointNameResolveCommand::resolveHostname
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(std::vector<std::string>& res, const std::string& hostname)
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{
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if(!asyncNameResolverMan_->started()) {
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asyncNameResolverMan_->startAsync(hostname, e_, this);
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return 0;
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} else {
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switch(asyncNameResolverMan_->getStatus()) {
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case -1:
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A2_LOG_INFO
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(fmt(MSG_NAME_RESOLUTION_FAILED, getCuid(), hostname.c_str(),
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asyncNameResolverMan_->getLastError().c_str()));
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return -1;
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case 0:
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return 0;
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case 1:
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asyncNameResolverMan_->getResolvedAddress(res);
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if(res.empty()) {
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A2_LOG_INFO
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(fmt(MSG_NAME_RESOLUTION_FAILED, getCuid(), hostname.c_str(),
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"No address returned"));
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return -1;
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} else {
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A2_LOG_INFO(fmt(MSG_NAME_RESOLUTION_COMPLETE,
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getCuid(), hostname.c_str(), res.front().c_str()));
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return 1;
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}
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}
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}
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// Unreachable
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return 0;
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}
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#endif // ENABLE_ASYNC_DNS
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void DHTEntryPointNameResolveCommand::setBootstrapEnabled(bool f)
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{
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bootstrapEnabled_ = f;
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}
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void DHTEntryPointNameResolveCommand::setTaskQueue(DHTTaskQueue* taskQueue)
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{
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taskQueue_ = taskQueue;
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}
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void DHTEntryPointNameResolveCommand::setTaskFactory
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(DHTTaskFactory* taskFactory)
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{
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taskFactory_ = taskFactory;
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}
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void DHTEntryPointNameResolveCommand::setRoutingTable
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(DHTRoutingTable* routingTable)
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{
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routingTable_ = routingTable;
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}
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void DHTEntryPointNameResolveCommand::setLocalNode
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(const std::shared_ptr<DHTNode>& localNode)
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{
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localNode_ = localNode;
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}
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} // namespace aria2
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