mirror of https://github.com/aria2/aria2
129 lines
4.3 KiB
C++
129 lines
4.3 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 "DHTPeerLookupTask.h"
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#include "Peer.h"
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#include "DHTGetPeersReplyMessage.h"
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#include "Logger.h"
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#include "LogFactory.h"
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#include "DHTMessageFactory.h"
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#include "DHTNode.h"
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#include "DHTNodeLookupEntry.h"
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#include "DHTMessageDispatcher.h"
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#include "DHTMessageCallback.h"
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#include "PeerStorage.h"
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#include "util.h"
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#include "DHTBucket.h"
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#include "bittorrent_helper.h"
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#include "DHTPeerLookupTaskCallback.h"
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#include "DHTQueryMessage.h"
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#include "DHTGetPeersMessage.h"
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#include "DHTAnnouncePeerMessage.h"
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#include "fmt.h"
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namespace aria2 {
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DHTPeerLookupTask::DHTPeerLookupTask(
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const std::shared_ptr<DownloadContext>& downloadContext, uint16_t tcpPort)
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: DHTAbstractNodeLookupTask<DHTGetPeersReplyMessage>(
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bittorrent::getInfoHash(downloadContext)),
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tcpPort_(tcpPort)
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{
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}
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void DHTPeerLookupTask::getNodesFromMessage(
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std::vector<std::shared_ptr<DHTNode>>& nodes,
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const DHTGetPeersReplyMessage* message)
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{
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auto& knodes = message->getClosestKNodes();
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nodes.insert(std::end(nodes), std::begin(knodes), std::end(knodes));
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}
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void DHTPeerLookupTask::onReceivedInternal(
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const DHTGetPeersReplyMessage* message)
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{
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std::shared_ptr<DHTNode> remoteNode = message->getRemoteNode();
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tokenStorage_[util::toHex(remoteNode->getID(), DHT_ID_LENGTH)] =
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message->getToken();
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peerStorage_->addPeer(message->getValues());
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A2_LOG_INFO(fmt("Received %lu peers.",
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static_cast<unsigned long>(message->getValues().size())));
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}
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std::unique_ptr<DHTMessage>
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DHTPeerLookupTask::createMessage(const std::shared_ptr<DHTNode>& remoteNode)
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{
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return getMessageFactory()->createGetPeersMessage(remoteNode, getTargetID());
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}
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std::unique_ptr<DHTMessageCallback> DHTPeerLookupTask::createCallback()
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{
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return make_unique<DHTPeerLookupTaskCallback>(this);
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}
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void DHTPeerLookupTask::onFinish()
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{
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A2_LOG_DEBUG(fmt("Peer lookup for %s finished",
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util::toHex(getTargetID(), DHT_ID_LENGTH).c_str()));
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// send announce_peer message to K closest nodes
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size_t num = DHTBucket::K;
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for (auto i = std::begin(getEntries()), eoi = std::end(getEntries());
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i != eoi && num > 0; ++i) {
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if (!(*i)->used) {
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continue;
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}
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auto& node = (*i)->node;
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std::string idHex = util::toHex(node->getID(), DHT_ID_LENGTH);
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std::string token = tokenStorage_[idHex];
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if (token.empty()) {
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A2_LOG_DEBUG(fmt("Token is empty for ID:%s", idHex.c_str()));
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continue;
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}
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getMessageDispatcher()->addMessageToQueue(
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getMessageFactory()->createAnnouncePeerMessage(
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node,
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getTargetID(), // this is infoHash
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tcpPort_, token));
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--num;
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}
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}
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void DHTPeerLookupTask::setPeerStorage(const std::shared_ptr<PeerStorage>& ps)
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{
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peerStorage_ = ps;
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}
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} // namespace aria2
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