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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 "nodelookup.h"
#include "rpcmsg.h"
#include "node.h"
#include "pack.h"
using namespace bt;
namespace dht
{
NodeLookup::NodeLookup(const dht::Key & key,RPCServer* rpc,Node* node)
: Task(rpc,node),node_id(key),num_nodes_rsp(0)
{
}
NodeLookup::~NodeLookup()
{}
void NodeLookup::callFinished(RPCCall* ,MsgBase* rsp)
{
// Out() << "NodeLookup::callFinished" << endl;
if (isFinished())
return;
// check the response and see if it is a good one
if (rsp->getMethod() == dht::FIND_NODE && rsp->getType() == dht::RSP_MSG)
{
FindNodeRsp* fnr = (FindNodeRsp*)rsp;
const TQByteArray & nodes = fnr->getNodes();
Uint32 nnodes = nodes.size() / 26;
for (Uint32 j = 0;j < nnodes;j++)
{
// unpack an entry and add it to the todo list
KBucketEntry e = UnpackBucketEntry(nodes,j*26);
// lets not talk to ourself
if (e.getID() != node->getOurID() && !todo.contains(e) && !visited.contains(e))
todo.append(e);
}
num_nodes_rsp++;
}
}
void NodeLookup::callTimeout(RPCCall*)
{
// Out() << "NodeLookup::callTimeout" << endl;
}
void NodeLookup::update()
{
// Out() << "NodeLookup::update" << endl;
// Out() << "todo = " << todo.count() << " ; visited = " << visited.count() << endl;
// go over the todo list and send find node calls
// 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
FindNodeReq* fnr = new FindNodeReq(node->getOurID(),node_id);
fnr->setOrigin(e.getAddress());
rpcCall(fnr);
visited.append(e);
}
// remove the entry from the todo list
todo.pop_front();
}
if (todo.empty() && getNumOutstandingRequests() == 0 && !isFinished())
done();
else if (num_nodes_rsp > 50)
done(); // quit after 50 nodes responses
}
}
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