mirror of https://github.com/aria2/aria2
210 lines
6.3 KiB
C++
210 lines
6.3 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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#ifdef ENABLE_ASYNC_DNS
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#include "AsyncNameResolver.h"
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#endif // ENABLE_ASYNC_DNS
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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 "StringFormat.h"
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namespace aria2 {
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DHTEntryPointNameResolveCommand::DHTEntryPointNameResolveCommand(int32_t cuid, DownloadEngine* e, const std::deque<std::pair<std::string, uint16_t> >& entryPoints):
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Command(cuid),
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_e(e),
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_entryPoints(entryPoints),
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_bootstrapEnabled(false)
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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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disableNameResolverCheck(_resolver);
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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->_requestGroupMan->downloadFinished() || _e->isHaltRequested()) {
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return true;
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}
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#ifdef ENABLE_ASYNC_DNS
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if(_resolver.isNull()) {
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_resolver.reset(new AsyncNameResolver());
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}
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#endif // ENABLE_ASYNC_DNS
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try {
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#ifdef ENABLE_ASYNC_DNS
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if(_e->option->getAsBool(PREF_ASYNC_DNS)) {
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while(_entryPoints.size()) {
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std::string hostname = _entryPoints.front().first;
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try {
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if(resolveHostname(hostname, _resolver)) {
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hostname = _resolver->getResolvedAddresses().front();
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std::pair<std::string, uint16_t> p(hostname,
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_entryPoints.front().second);
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_resolvedEntryPoints.push_back(p);
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addPingTask(p);
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} else {
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_e->commands.push_back(this);
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return false;
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}
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} catch(RecoverableException& e) {
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logger->error(EX_EXCEPTION_CAUGHT, e);
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}
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_resolver->reset();
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_entryPoints.erase(_entryPoints.begin());
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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.size()) {
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std::string hostname = _entryPoints.front().first;
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try {
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std::deque<std::string> addrs;
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res.resolve(addrs, hostname);
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std::pair<std::string, uint16_t> p(addrs.front(),
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_entryPoints.front().second);
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_resolvedEntryPoints.push_back(p);
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addPingTask(p);
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} catch(RecoverableException& e) {
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logger->error(EX_EXCEPTION_CAUGHT, e);
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}
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_entryPoints.erase(_entryPoints.begin());
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}
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}
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if(_bootstrapEnabled && _resolvedEntryPoints.size()) {
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_taskQueue->addPeriodicTask1(_taskFactory->createNodeLookupTask(_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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logger->error(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(const std::pair<std::string, uint16_t>& addr)
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{
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SharedHandle<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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bool DHTEntryPointNameResolveCommand::resolveHostname
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(const std::string& hostname,
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const SharedHandle<AsyncNameResolver>& resolver)
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{
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switch(resolver->getStatus()) {
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case AsyncNameResolver::STATUS_READY:
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logger->info(MSG_RESOLVING_HOSTNAME, cuid, hostname.c_str());
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resolver->resolve(hostname);
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setNameResolverCheck(resolver);
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return false;
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case AsyncNameResolver::STATUS_SUCCESS:
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logger->info(MSG_NAME_RESOLUTION_COMPLETE, cuid,
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resolver->getHostname().c_str(),
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resolver->getResolvedAddresses().front().c_str());
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return true;
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break;
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case AsyncNameResolver::STATUS_ERROR:
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throw DlAbortEx
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(StringFormat(MSG_NAME_RESOLUTION_FAILED, cuid,
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hostname.c_str(),
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resolver->getError().c_str()).str());
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default:
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return false;
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}
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}
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void DHTEntryPointNameResolveCommand::setNameResolverCheck
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(const SharedHandle<AsyncNameResolver>& resolver)
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{
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_e->addNameResolverCheck(resolver, this);
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}
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void DHTEntryPointNameResolveCommand::disableNameResolverCheck
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(const SharedHandle<AsyncNameResolver>& resolver)
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{
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_e->deleteNameResolverCheck(resolver, this);
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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(const SharedHandle<DHTTaskQueue>& taskQueue)
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{
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_taskQueue = taskQueue;
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}
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void DHTEntryPointNameResolveCommand::setTaskFactory(const SharedHandle<DHTTaskFactory>& taskFactory)
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{
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_taskFactory = taskFactory;
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}
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void DHTEntryPointNameResolveCommand::setRoutingTable(const SharedHandle<DHTRoutingTable>& routingTable)
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{
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_routingTable = routingTable;
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}
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void DHTEntryPointNameResolveCommand::setLocalNode(const SharedHandle<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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