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557 lines
12 KiB
557 lines
12 KiB
/***************************************************************************
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* Copyright (C) 2005 by Joris Guisson *
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* joris.guisson@gmail.com *
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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 *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <tqfile.h>
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#include <tdelocale.h>
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#include <functions.h>
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#include <util/log.h>
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#include <torrent/globals.h>
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#include <kademlia/dhtbase.h>
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#include <kademlia/dhttrackerbackend.h>
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#include "tracker.h"
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#include "udptracker.h"
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#include "httptracker.h"
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#include "torrentcontrol.h"
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#include "torrent.h"
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#include "peermanager.h"
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#include "peersourcemanager.h"
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namespace bt
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{
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const Uint32 INITIAL_WAIT_TIME = 30;
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const Uint32 LONGER_WAIT_TIME = 300;
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const Uint32 FINAL_WAIT_TIME = 1800;
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PeerSourceManager::PeerSourceManager(TorrentControl* tor,PeerManager* pman)
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: tor(tor),pman(pman),curr(0),m_dht(0),started(false),pending(false)
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{
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failures = 0;
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trackers.setAutoDelete(true);
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no_save_custom_trackers = false;
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const TrackerTier* t = tor->getTorrent().getTrackerList();
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int tier = 1;
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while (t)
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{
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// add all standard trackers
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const KURL::List & tr = t->urls;
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KURL::List::const_iterator i = tr.begin();
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while (i != tr.end())
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{
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addTracker(*i,false,tier);
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i++;
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}
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tier++;
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t = t->next;
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}
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//load custom trackers
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loadCustomURLs();
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connect(&timer,TQT_SIGNAL(timeout()),this,TQT_SLOT(updateCurrentManually()));
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}
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PeerSourceManager::~PeerSourceManager()
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{
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saveCustomURLs();
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additional.setAutoDelete(true);
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TQPtrList<kt::PeerSource>::iterator itr = additional.begin();
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while (itr != additional.end())
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{
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kt::PeerSource* ps = *itr;
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ps->aboutToBeDestroyed();
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itr++;
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}
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additional.clear();
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}
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void PeerSourceManager::addTracker(Tracker* trk)
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{
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trackers.insert(trk->trackerURL(),trk);
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connect(trk,TQT_SIGNAL(peersReady( kt::PeerSource* )),
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pman,TQT_SLOT(peerSourceReady( kt::PeerSource* )));
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}
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void PeerSourceManager::addPeerSource(kt::PeerSource* ps)
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{
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additional.append(ps);
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connect(ps,TQT_SIGNAL(peersReady( kt::PeerSource* )),
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pman,TQT_SLOT(peerSourceReady( kt::PeerSource* )));
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}
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void PeerSourceManager::removePeerSource(kt::PeerSource* ps)
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{
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disconnect(ps,TQT_SIGNAL(peersReady( kt::PeerSource* )),
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pman,TQT_SLOT(peerSourceReady( kt::PeerSource* )));
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additional.remove(ps);
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}
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void PeerSourceManager::start()
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{
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if (started)
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return;
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started = true;
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TQPtrList<kt::PeerSource>::iterator i = additional.begin();
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while (i != additional.end())
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{
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(*i)->start();
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i++;
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}
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if (!curr)
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{
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if (trackers.count() > 0)
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{
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switchTracker(selectTracker());
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tor->resetTrackerStats();
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curr->start();
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}
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}
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else
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{
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tor->resetTrackerStats();
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curr->start();
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}
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}
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void PeerSourceManager::stop(WaitJob* wjob)
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{
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if (!started)
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return;
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started = false;
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TQPtrList<kt::PeerSource>::iterator i = additional.begin();
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while (i != additional.end())
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{
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(*i)->stop();
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i++;
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}
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if (curr)
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curr->stop(wjob);
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timer.stop();
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statusChanged(i18n("Stopped"));
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}
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void PeerSourceManager::completed()
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{
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TQPtrList<kt::PeerSource>::iterator i = additional.begin();
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while (i != additional.end())
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{
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(*i)->completed();
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i++;
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}
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if (curr)
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curr->completed();
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}
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void PeerSourceManager::manualUpdate()
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{
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TQPtrList<kt::PeerSource>::iterator i = additional.begin();
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while (i != additional.end())
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{
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(*i)->manualUpdate();
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i++;
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}
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if (curr)
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{
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timer.stop();
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curr->manualUpdate();
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}
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}
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KURL PeerSourceManager::getTrackerURL() const
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{
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if (curr)
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return curr->trackerURL();
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else
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return KURL();
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}
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KURL::List PeerSourceManager::getTrackerURLs()
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{
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KURL::List urls;
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const TrackerTier* t = tor->getTorrent().getTrackerList();
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while (t)
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{
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urls += t->urls;
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t = t->next;
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}
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urls += custom_trackers;
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return urls;
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}
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void PeerSourceManager::addTracker(KURL url, bool custom,int tier)
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{
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if (trackers.contains(url))
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return;
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Tracker* trk = 0;
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if (url.protocol() == "udp")
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trk = new UDPTracker(url,tor,tor->getTorrent().getPeerID(),tier);
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else
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trk = new HTTPTracker(url,tor,tor->getTorrent().getPeerID(),tier);
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addTracker(trk);
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if (custom)
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{
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custom_trackers.append(url);
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if (!no_save_custom_trackers)
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saveCustomURLs();
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}
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}
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bool PeerSourceManager::removeTracker(KURL url)
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{
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if (!custom_trackers.contains(url))
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return false;
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custom_trackers.remove(url);
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Tracker* trk = trackers.find(url);
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if (curr == trk)
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{
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// do a timed delete on the tracker, so the stop signal
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// has plenty of time to reach it
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trk->stop();
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trk->timedDelete(10 * 1000);
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trackers.setAutoDelete(false);
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trackers.erase(url);
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trackers.setAutoDelete(true);
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if (trackers.count() > 0)
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{
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switchTracker(selectTracker());
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tor->resetTrackerStats();
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curr->start();
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}
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}
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else
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{
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// just delete if not the current one
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trackers.erase(url);
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}
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saveCustomURLs();
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return true;
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}
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void PeerSourceManager::setTracker(KURL url)
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{
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Tracker* trk = trackers.find(url);
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if (!trk)
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return;
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if (curr != trk)
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{
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if (curr)
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curr->stop();
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switchTracker(trk);
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tor->resetTrackerStats();
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trk->start();
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}
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}
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void PeerSourceManager::restoreDefault()
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{
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KURL::List::iterator i = custom_trackers.begin();
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while (i != custom_trackers.end())
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{
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Tracker* t = trackers.find(*i);
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if (t)
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{
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if (curr == t)
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{
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if (t->isStarted())
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t->stop();
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curr = 0;
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trackers.erase(*i);
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if (trackers.count() > 0)
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{
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switchTracker(trackers.begin()->second);
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if (started)
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{
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tor->resetTrackerStats();
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curr->start();
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}
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}
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}
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else
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{
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trackers.erase(*i);
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}
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}
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i++;
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}
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custom_trackers.clear();
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saveCustomURLs();
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}
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void PeerSourceManager::saveCustomURLs()
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{
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TQString trackers_file = tor->getTorDir() + "trackers";
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TQFile file(trackers_file);
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if(!file.open(IO_WriteOnly))
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return;
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TQTextStream stream(&file);
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for (KURL::List::iterator i = custom_trackers.begin();i != custom_trackers.end();i++)
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stream << (*i).prettyURL() << ::endl;
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}
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void PeerSourceManager::loadCustomURLs()
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{
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TQString trackers_file = tor->getTorDir() + "trackers";
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TQFile file(trackers_file);
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if(!file.open(IO_ReadOnly))
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return;
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no_save_custom_trackers = true;
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TQTextStream stream(&file);
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while (!stream.atEnd())
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{
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KURL url = stream.readLine();
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addTracker(url,true);
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}
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no_save_custom_trackers = false;
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}
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Tracker* PeerSourceManager::selectTracker()
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{
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Tracker* n = 0;
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PtrMap<KURL,Tracker>::iterator i = trackers.begin();
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while (i != trackers.end())
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{
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Tracker* t = i->second;
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if (!n)
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n = t;
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else if (t->failureCount() < n->failureCount())
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n = t;
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else if (t->failureCount() == n->failureCount())
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n = t->getTier() < n->getTier() ? t : n;
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i++;
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}
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if (n)
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{
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Out(SYS_TRK|LOG_DEBUG) << "Selected tracker " << n->trackerURL().prettyURL()
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<< " (tier = " << n->getTier() << ")" << endl;
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}
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return n;
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}
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void PeerSourceManager::onTrackerError(const TQString & err)
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{
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failures++;
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pending = false;
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if (started)
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statusChanged(err);
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if (!started)
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return;
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// select an other tracker
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Tracker* trk = selectTracker();
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if (!trk)
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{
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if (curr->failureCount() > 5)
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{
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// we failed to contact the only tracker 5 times in a row, so try again in
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// 30 minutes
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curr->setInterval(FINAL_WAIT_TIME);
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timer.start(FINAL_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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else if (curr->failureCount() > 2)
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{
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// we failed to contact the only tracker 3 times in a row, so try again in
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// a minute or 5, no need for hammering every 30 seconds
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curr->setInterval(LONGER_WAIT_TIME);
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timer.start(LONGER_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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else
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{
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// lets not hammer and wait 30 seconds
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curr->setInterval(INITIAL_WAIT_TIME);
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timer.start(INITIAL_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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}
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else
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{
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curr->stop();
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// switch to another one
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switchTracker(trk);
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if (trk->failureCount() == 0)
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{
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tor->resetTrackerStats();
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curr->start();
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}
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else if (trk->failureCount() > 5)
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{
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curr->setInterval(FINAL_WAIT_TIME);
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timer.start(FINAL_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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else if (trk->failureCount() > 2)
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{
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// we tried everybody 3 times and it didn't work
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// wait 5 minutes and try again
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curr->setInterval(LONGER_WAIT_TIME);
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timer.start(LONGER_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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else
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{
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// wait 30 seconds and try again
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curr->setInterval(INITIAL_WAIT_TIME);
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timer.start(INITIAL_WAIT_TIME * 1000,true);
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request_time = TQDateTime::currentDateTime();
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}
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}
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}
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void PeerSourceManager::onTrackerOK()
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{
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failures = 0;
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if (started)
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{
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timer.start(curr->getInterval() * 1000,true);
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curr->scrape();
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}
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pending = false;
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if (started)
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statusChanged(i18n("OK"));
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request_time = TQDateTime::currentDateTime();
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}
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void PeerSourceManager::onTrackerRequestPending()
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{
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if (started)
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statusChanged(i18n("Announcing"));
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pending = true;
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}
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void PeerSourceManager::updateCurrentManually()
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{
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if (!curr)
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return;
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if (!curr->isStarted())
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tor->resetTrackerStats();
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curr->manualUpdate();
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}
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void PeerSourceManager::switchTracker(Tracker* trk)
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{
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if (curr == trk)
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return;
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if (curr)
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{
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disconnect(curr,TQT_SIGNAL(requestFailed( const TQString& )),
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this,TQT_SLOT(onTrackerError( const TQString& )));
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disconnect(curr,TQT_SIGNAL(requestOK()),this,TQT_SLOT(onTrackerOK()));
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disconnect(curr,TQT_SIGNAL(requestPending()),this,TQT_SLOT(onTrackerRequestPending()));
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curr = 0;
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}
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curr = trk;
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if (curr)
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{
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Out(SYS_TRK|LOG_NOTICE) << "Switching to tracker " << trk->trackerURL() << endl;
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TQObject::connect(curr,TQT_SIGNAL(requestFailed( const TQString& )),
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this,TQT_SLOT(onTrackerError( const TQString& )));
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TQObject::connect(curr,TQT_SIGNAL(requestOK()),
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this,TQT_SLOT(onTrackerOK()));
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TQObject::connect(curr,TQT_SIGNAL(requestPending()),
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this,TQT_SLOT(onTrackerRequestPending()));
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}
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}
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Uint32 PeerSourceManager::getTimeToNextUpdate() const
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{
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if (pending || !started || !curr)
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return 0;
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return curr->getInterval() - request_time.secsTo(TQDateTime::currentDateTime());
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}
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Uint32 PeerSourceManager::getNumSeeders() const
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{
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return curr ? curr->getNumSeeders() : 0;
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}
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Uint32 PeerSourceManager::getNumLeechers() const
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{
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return curr ? curr->getNumLeechers() : 0;
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}
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void PeerSourceManager::addDHT()
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{
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if(m_dht)
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{
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removePeerSource(m_dht);
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delete m_dht;
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}
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m_dht = new dht::DHTTrackerBackend(Globals::instance().getDHT(),tor);
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// add the DHT source
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addPeerSource(m_dht);
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}
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void PeerSourceManager::removeDHT()
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{
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if(m_dht == 0)
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{
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removePeerSource(m_dht);
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return;
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}
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removePeerSource(m_dht);
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delete m_dht;
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m_dht = 0;
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}
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bool PeerSourceManager::dhtStarted()
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{
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return m_dht != 0;
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}
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}
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#include "peersourcemanager.moc"
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