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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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. *
***************************************************************************/
#include <util/log.h>
#include <torrent/globals.h>
#include "announcetask.h"
#include "node.h"
#include "pack.h"
using namespace bt;
namespace dht
{
AnnounceTask::AnnounceTask(Database* db,RPCServer* rpc, Node* node,const dht::Key & info_hash,bt::Uint16 port)
: Task(rpc, node),info_hash(info_hash),port(port),db(db)
{}
AnnounceTask::~AnnounceTask()
{}
void AnnounceTask::callFinished(RPCCall* c, MsgBase* rsp)
{
// Out() << "AnnounceTask::callFinished" << endl;
// if we do not have a get peers response, return
// announce_peer's response are just empty anyway
if (c->getMsgMethod() != dht::GET_PEERS)
return;
// it is either a GetPeersNodesRsp or a GetPeersValuesRsp
GetPeersRsp* gpr = dynamic_cast<GetPeersRsp*>(rsp);
if (!gpr)
return;
if (gpr->containsNodes())
{
const QByteArray & n = gpr->getData();
Uint32 nval = n.size() / 26;
for (Uint32 i = 0;i < nval;i++)
{
// add node to todo list
KBucketEntry e = UnpackBucketEntry(n,i*26);
if (!todo.contains(e) && !visited.contains(e) &&
todo.count() < 100)
{
todo.append(e);
}
}
}
else
{
// store the items in the database
const DBItemList & items = gpr->getItemList();
for (DBItemList::const_iterator i = items.begin();i != items.end();i++)
{
db->store(info_hash,*i);
// also add the items to the returned_items list
returned_items.append(*i);
}
// add the peer who responded to the answered list, so we can do an announce
KBucketEntry e(rsp->getOrigin(),rsp->getID());
if (!answered.contains(KBucketEntryAndToken(e,gpr->getToken())) && !answered_visited.contains(e))
{
answered.append(KBucketEntryAndToken(e,gpr->getToken()));
}
emitDataReady();
}
}
void AnnounceTask::callTimeout(RPCCall* )
{
//Out() << "AnnounceTask::callTimeout " << endl;
}
void AnnounceTask::update()
{
/* Out() << "AnnounceTask::update " << endl;
Out() << "todo " << todo.count() << " ; answered " << answered.count() << endl;
Out() << "visited " << visited.count() << " ; answered_visited " << answered_visited.count() << endl;
*/
while (!answered.empty() && canDoRequest())
{
KBucketEntryAndToken & e = answered.first();
if (!answered_visited.contains(e))
{
AnnounceReq* anr = new AnnounceReq(node->getOurID(),info_hash,port,e.getToken());
anr->setOrigin(e.getAddress());
rpcCall(anr);
answered_visited.append(e);
}
answered.pop_front();
}
// go over the todo list and send get_peers requests
// until we have nothing left
while (!todo.empty() && canDoRequest())
{
KBucketEntry e = todo.first();
// onLy send a findNode if we haven't allrready visited the node
if (!visited.contains(e))
{
// send a findNode to the node
GetPeersReq* gpr = new GetPeersReq(node->getOurID(),info_hash);
gpr->setOrigin(e.getAddress());
rpcCall(gpr);
visited.append(e);
}
// remove the entry from the todo list
todo.pop_front();
}
if (todo.empty() && answered.empty() && getNumOutstandingRequests() == 0 && !isFinished())
{
Out(SYS_DHT|LOG_NOTICE) << "DHT: AnnounceTask done" << endl;
done();
}
else if (answered_visited.count() >= dht::K)
{
// if K announces have occurred stop
Out(SYS_DHT|LOG_NOTICE) << "DHT: AnnounceTask done" << endl;
done();
}
}
bool AnnounceTask::takeItem(DBItem & item)
{
if (returned_items.empty())
return false;
item = returned_items.first();
returned_items.pop_front();
return true;
}
}
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