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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 "DHTPeerLookupTask.h"
#include "Peer.h"
#include "DHTGetPeersReplyMessage.h"
#include "Logger.h"
#include "DHTMessageFactory.h"
#include "DHTNode.h"
#include "DHTNodeLookupEntry.h"
#include "DHTMessageDispatcher.h"
#include "DHTMessageCallback.h"
#include "PeerStorage.h"
#include "BtRuntime.h"
#include "BtContext.h"
#include "Util.h"
#include "DHTBucket.h"
namespace aria2 {
DHTPeerLookupTask::DHTPeerLookupTask(const SharedHandle<BtContext>& btContext):
DHTAbstractNodeLookupTask(btContext->getInfoHash()),
_ctx(btContext) {}
void
DHTPeerLookupTask::getNodesFromMessage(std::deque<SharedHandle<DHTNode> >& nodes,
const SharedHandle<DHTMessage>& message)
{
SharedHandle<DHTGetPeersReplyMessage> m(dynamic_pointer_cast<DHTGetPeersReplyMessage>(message));
if(!m.isNull()) {
const std::deque<SharedHandle<DHTNode> >& knodes = m->getClosestKNodes();
nodes.insert(nodes.end(), knodes.begin(), knodes.end());
}
}
void DHTPeerLookupTask::onReceivedInternal(const SharedHandle<DHTMessage>& message)
{
SharedHandle<DHTGetPeersReplyMessage> m(dynamic_pointer_cast<DHTGetPeersReplyMessage>(message));
if(m.isNull()) {
return;
}
SharedHandle<DHTNode> remoteNode = m->getRemoteNode();
_tokenStorage[Util::toHex(remoteNode->getID(), DHT_ID_LENGTH)] = m->getToken();
_peerStorage->addPeer(m->getValues());
_peers.insert(_peers.end(), m->getValues().begin(), m->getValues().end());
_logger->info("Received %u peers.", m->getValues().size());
}
SharedHandle<DHTMessage> DHTPeerLookupTask::createMessage(const SharedHandle<DHTNode>& remoteNode)
{
return _factory->createGetPeersMessage(remoteNode, _targetID);
}
void DHTPeerLookupTask::onFinish()
{
// send announce_peer message to K closest nodes
size_t num = DHTBucket::K;
for(std::deque<SharedHandle<DHTNodeLookupEntry> >::const_iterator i = _entries.begin();
i != _entries.end() && num > 0; ++i, --num) {
if((*i)->_used) {
const SharedHandle<DHTNode>& node = (*i)->_node;
SharedHandle<DHTMessage> m =
_factory->createAnnouncePeerMessage(node,
_ctx->getInfoHash(),
_btRuntime->getListenPort(),
_tokenStorage[Util::toHex(node->getID(),
DHT_ID_LENGTH)]);
_dispatcher->addMessageToQueue(m);
}
}
}
void DHTPeerLookupTask::setBtRuntime(const SharedHandle<BtRuntime>& btRuntime)
{
_btRuntime = btRuntime;
}
void DHTPeerLookupTask::setPeerStorage(const SharedHandle<PeerStorage>& ps)
{
_peerStorage = ps;
}
} // namespace aria2
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