You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
379 lines
9.0 KiB
379 lines
9.0 KiB
/***************************************************************************
|
|
* 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 <tqmap.h>
|
|
#include <kresolver.h>
|
|
#include <util/log.h>
|
|
#include <util/array.h>
|
|
#include <util/functions.h>
|
|
#include <torrent/bnode.h>
|
|
#include <torrent/globals.h>
|
|
#include <tdesocketaddress.h>
|
|
#include "announcetask.h"
|
|
#include "dht.h"
|
|
#include "node.h"
|
|
#include "rpcserver.h"
|
|
#include "rpcmsg.h"
|
|
#include "kclosestnodessearch.h"
|
|
#include "database.h"
|
|
#include "taskmanager.h"
|
|
#include "nodelookup.h"
|
|
|
|
|
|
using namespace bt;
|
|
using namespace KNetwork;
|
|
|
|
namespace dht
|
|
{
|
|
|
|
|
|
|
|
DHT::DHT() : node(0),srv(0),db(0),tman(0)
|
|
{
|
|
connect(&update_timer,TQT_SIGNAL(timeout()),this,TQT_SLOT(update()));
|
|
}
|
|
|
|
|
|
DHT::~DHT()
|
|
{
|
|
if (running)
|
|
stop();
|
|
}
|
|
|
|
void DHT::start(const TQString & table,const TQString & key_file,bt::Uint16 port)
|
|
{
|
|
if (running)
|
|
return;
|
|
|
|
if (port == 0)
|
|
port = 6881;
|
|
|
|
table_file = table;
|
|
this->port = port;
|
|
Out(SYS_DHT|LOG_NOTICE) << "DHT: Starting on port " << port << endl;
|
|
srv = new RPCServer(this,port);
|
|
node = new Node(srv,key_file);
|
|
db = new Database();
|
|
tman = new TaskManager();
|
|
expire_timer.update();
|
|
running = true;
|
|
srv->start();
|
|
node->loadTable(table);
|
|
update_timer.start(1000);
|
|
started();
|
|
}
|
|
|
|
|
|
void DHT::stop()
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
update_timer.stop();
|
|
Out(SYS_DHT|LOG_NOTICE) << "DHT: Stopping " << endl;
|
|
srv->stop();
|
|
node->saveTable(table_file);
|
|
running = false;
|
|
stopped();
|
|
delete tman; tman = 0;
|
|
delete db; db = 0;
|
|
delete node; node = 0;
|
|
delete srv; srv = 0;
|
|
}
|
|
|
|
void DHT::ping(PingReq* r)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
// ignore requests we get from ourself
|
|
if (r->getID() == node->getOurID())
|
|
return;
|
|
|
|
Out(SYS_DHT|LOG_NOTICE) << "DHT: Sending ping response" << endl;
|
|
PingRsp rsp(r->getMTID(),node->getOurID());
|
|
rsp.setOrigin(r->getOrigin());
|
|
srv->sendMsg(&rsp);
|
|
node->recieved(this,r);
|
|
}
|
|
|
|
|
|
|
|
void DHT::findNode(FindNodeReq* r)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
// ignore requests we get from ourself
|
|
if (r->getID() == node->getOurID())
|
|
return;
|
|
|
|
Out(SYS_DHT|LOG_DEBUG) << "DHT: got findNode request" << endl;
|
|
node->recieved(this,r);
|
|
// find the K closest nodes and pack them
|
|
KClosestNodesSearch kns(r->getTarget(),K);
|
|
|
|
node->findKClosestNodes(kns);
|
|
|
|
Uint32 rs = kns.requiredSpace();
|
|
// create the data
|
|
TQByteArray nodes(rs);
|
|
// pack the found nodes in a byte array
|
|
if (rs > 0)
|
|
kns.pack(nodes);
|
|
|
|
FindNodeRsp fnr(r->getMTID(),node->getOurID(),nodes);
|
|
fnr.setOrigin(r->getOrigin());
|
|
srv->sendMsg(&fnr);
|
|
}
|
|
|
|
|
|
void DHT::announce(AnnounceReq* r)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
// ignore requests we get from ourself
|
|
if (r->getID() == node->getOurID())
|
|
return;
|
|
|
|
Out(SYS_DHT|LOG_DEBUG) << "DHT: got announce request" << endl;
|
|
node->recieved(this,r);
|
|
// first check if the token is OK
|
|
dht::Key token = r->getToken();
|
|
if (!db->checkToken(token,r->getOrigin().ipAddress().IPv4Addr(),r->getOrigin().port()))
|
|
return;
|
|
|
|
// everything OK, so store the value
|
|
Uint8 tdata[6];
|
|
bt::WriteUint32(tdata,0,r->getOrigin().ipAddress().IPv4Addr());
|
|
bt::WriteUint16(tdata,4,r->getPort());
|
|
db->store(r->getInfoHash(),DBItem(tdata));
|
|
// send a proper response to indicate everything is OK
|
|
AnnounceRsp rsp(r->getMTID(),node->getOurID());
|
|
rsp.setOrigin(r->getOrigin());
|
|
srv->sendMsg(&rsp);
|
|
}
|
|
|
|
|
|
|
|
void DHT::getPeers(GetPeersReq* r)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
// ignore requests we get from ourself
|
|
if (r->getID() == node->getOurID())
|
|
return;
|
|
|
|
Out(SYS_DHT|LOG_DEBUG) << "DHT: got getPeers request" << endl;
|
|
node->recieved(this,r);
|
|
DBItemList dbl;
|
|
db->sample(r->getInfoHash(),dbl,50);
|
|
|
|
// generate a token
|
|
dht::Key token = db->genToken(r->getOrigin().ipAddress().IPv4Addr(),r->getOrigin().port());
|
|
|
|
if (dbl.count() == 0)
|
|
{
|
|
// if data is null do the same as when we have a findNode request
|
|
// find the K closest nodes and pack them
|
|
KClosestNodesSearch kns(r->getInfoHash(),K);
|
|
node->findKClosestNodes(kns);
|
|
Uint32 rs = kns.requiredSpace();
|
|
// create the data
|
|
TQByteArray nodes(rs);
|
|
// pack the found nodes in a byte array
|
|
if (rs > 0)
|
|
kns.pack(nodes);
|
|
|
|
GetPeersRsp fnr(r->getMTID(),node->getOurID(),nodes,token);
|
|
fnr.setOrigin(r->getOrigin());
|
|
srv->sendMsg(&fnr);
|
|
}
|
|
else
|
|
{
|
|
// send a get peers response
|
|
GetPeersRsp fvr(r->getMTID(),node->getOurID(),dbl,token);
|
|
fvr.setOrigin(r->getOrigin());
|
|
srv->sendMsg(&fvr);
|
|
}
|
|
}
|
|
|
|
void DHT::response(MsgBase* r)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
node->recieved(this,r);
|
|
}
|
|
|
|
void DHT::error(ErrMsg* )
|
|
{}
|
|
|
|
|
|
void DHT::portRecieved(const TQString & ip,bt::Uint16 port)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
Out(SYS_DHT|LOG_DEBUG) << "Sending ping request to " << ip << ":" << port << endl;
|
|
PingReq* r = new PingReq(node->getOurID());
|
|
r->setOrigin(KInetSocketAddress(ip,port));
|
|
srv->doCall(r);
|
|
}
|
|
|
|
bool DHT::canStartTask() const
|
|
{
|
|
// we can start a task if we have less then 7 runnning and
|
|
// there are at least 16 RPC slots available
|
|
if (tman->getNumTasks() >= 7)
|
|
return false;
|
|
else if (256 - srv->getNumActiveRPCCalls() <= 16)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
AnnounceTask* DHT::announce(const bt::SHA1Hash & info_hash,bt::Uint16 port)
|
|
{
|
|
if (!running)
|
|
return 0;
|
|
|
|
KClosestNodesSearch kns(info_hash,K);
|
|
node->findKClosestNodes(kns);
|
|
if (kns.getNumEntries() > 0)
|
|
{
|
|
Out(SYS_DHT|LOG_NOTICE) << "DHT: Doing announce " << endl;
|
|
AnnounceTask* at = new AnnounceTask(db,srv,node,info_hash,port);
|
|
at->start(kns,!canStartTask());
|
|
tman->addTask(at);
|
|
if (!db->contains(info_hash))
|
|
db->insert(info_hash);
|
|
return at;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
NodeLookup* DHT::refreshBucket(const dht::Key & id,KBucket & bucket)
|
|
{
|
|
if (!running)
|
|
return 0;
|
|
|
|
KClosestNodesSearch kns(id,K);
|
|
bucket.findKClosestNodes(kns);
|
|
bucket.updateRefreshTimer();
|
|
if (kns.getNumEntries() > 0)
|
|
{
|
|
Out(SYS_DHT|LOG_DEBUG) << "DHT: refreshing bucket " << endl;
|
|
NodeLookup* nl = new NodeLookup(id,srv,node);
|
|
nl->start(kns,!canStartTask());
|
|
tman->addTask(nl);
|
|
return nl;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
NodeLookup* DHT::findNode(const dht::Key & id)
|
|
{
|
|
if (!running)
|
|
return 0;
|
|
|
|
KClosestNodesSearch kns(id,K);
|
|
node->findKClosestNodes(kns);
|
|
if (kns.getNumEntries() > 0)
|
|
{
|
|
Out(SYS_DHT|LOG_DEBUG) << "DHT: finding node " << endl;
|
|
NodeLookup* at = new NodeLookup(id,srv,node);
|
|
at->start(kns,!canStartTask());
|
|
tman->addTask(at);
|
|
return at;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void DHT::update()
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
if (expire_timer.getElapsedSinceUpdate() > 5*60*1000)
|
|
{
|
|
db->expire(bt::GetCurrentTime());
|
|
expire_timer.update();
|
|
}
|
|
|
|
node->refreshBuckets(this);
|
|
tman->removeFinishedTasks(this);
|
|
stats.num_tasks = tman->getNumTasks() + tman->getNumQueuedTasks();
|
|
stats.num_peers = node->getNumEntriesInRoutingTable();
|
|
}
|
|
|
|
void DHT::timeout(const MsgBase* r)
|
|
{
|
|
node->onTimeout(r);
|
|
}
|
|
|
|
void DHT::addDHTNode(const TQString & host,Uint16 hport)
|
|
{
|
|
if (!running)
|
|
return;
|
|
|
|
KResolverResults res = KResolver::resolve(host,TQString::number(hport));
|
|
if (res.count() > 0)
|
|
{
|
|
srv->ping(node->getOurID(),res.front().address());
|
|
}
|
|
}
|
|
|
|
TQMap<TQString, int> DHT::getClosestGoodNodes(int maxNodes)
|
|
{
|
|
TQMap<TQString, int> map;
|
|
|
|
if(!node)
|
|
return map;
|
|
|
|
int max = 0;
|
|
KClosestNodesSearch kns(node->getOurID(), maxNodes*2);
|
|
node->findKClosestNodes(kns);
|
|
|
|
KClosestNodesSearch::Itr it;
|
|
for(it = kns.begin(); it != kns.end(); ++it)
|
|
{
|
|
KBucketEntry e = it->second;
|
|
|
|
if(!e.isGood())
|
|
continue;
|
|
|
|
KInetSocketAddress a = e.getAddress();
|
|
|
|
map.insert(a.ipAddress().toString(), a.port());
|
|
if(++max >= maxNodes)
|
|
break;
|
|
}
|
|
|
|
return map;
|
|
}
|
|
}
|
|
|
|
#include "dht.moc"
|