--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/network/torrent/torrentclient.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,1529 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "connectionmanager.h"
+#include "filemanager.h"
+#include "metainfo.h"
+#include "torrentclient.h"
+#include "torrentserver.h"
+#include "trackerclient.h"
+#include "peerwireclient.h"
+#include "ratecontroller.h"
+
+#include <QtCore>
+#include <QNetworkInterface>
+
+// These constants could also be configurable by the user.
+static const int ServerMinPort = 6881;
+static const int ServerMaxPort = /* 6889 */ 7000;
+static const int BlockSize = 16384;
+static const int MaxBlocksInProgress = 5;
+static const int MaxBlocksInMultiMode = 2;
+static const int MaxConnectionPerPeer = 1;
+static const int RateControlWindowLength = 10;
+static const int RateControlTimerDelay = 1000;
+static const int MinimumTimeBeforeRevisit = 30;
+static const int MaxUploads = 4;
+static const int UploadScheduleInterval = 10000;
+static const int EndGamePieces = 5;
+
+class TorrentPiece {
+public:
+ int index;
+ int length;
+ QBitArray completedBlocks;
+ QBitArray requestedBlocks;
+ bool inProgress;
+};
+
+class TorrentClientPrivate
+{
+public:
+ TorrentClientPrivate(TorrentClient *qq);
+
+ // State / error
+ void setError(TorrentClient::Error error);
+ void setState(TorrentClient::State state);
+ TorrentClient::Error error;
+ TorrentClient::State state;
+ QString errorString;
+ QString stateString;
+
+ // Where to save data
+ QString destinationFolder;
+ MetaInfo metaInfo;
+
+ // Announce tracker and file manager
+ QByteArray peerId;
+ QByteArray infoHash;
+ TrackerClient trackerClient;
+ FileManager fileManager;
+
+ // Connections
+ QList<PeerWireClient *> connections;
+ QList<TorrentPeer *> peers;
+ bool schedulerCalled;
+ void callScheduler();
+ bool connectingToClients;
+ void callPeerConnector();
+ int uploadScheduleTimer;
+
+ // Pieces
+ QMap<int, PeerWireClient *> readIds;
+ QMultiMap<PeerWireClient *, TorrentPiece *> payloads;
+ QMap<int, TorrentPiece *> pendingPieces;
+ QBitArray completedPieces;
+ QBitArray incompletePieces;
+ int pieceCount;
+
+ // Progress
+ int lastProgressValue;
+ qint64 downloadedBytes;
+ qint64 uploadedBytes;
+ int downloadRate[RateControlWindowLength];
+ int uploadRate[RateControlWindowLength];
+ int transferRateTimer;
+
+ TorrentClient *q;
+};
+
+TorrentClientPrivate::TorrentClientPrivate(TorrentClient *qq)
+ : trackerClient(qq), q(qq)
+{
+ error = TorrentClient::UnknownError;
+ state = TorrentClient::Idle;
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "Unknown error");
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Idle");
+ schedulerCalled = false;
+ connectingToClients = false;
+ uploadScheduleTimer = 0;
+ lastProgressValue = -1;
+ pieceCount = 0;
+ downloadedBytes = 0;
+ uploadedBytes = 0;
+ memset(downloadRate, 0, sizeof(downloadRate));
+ memset(uploadRate, 0, sizeof(uploadRate));
+ transferRateTimer = 0;
+}
+
+void TorrentClientPrivate::setError(TorrentClient::Error errorCode)
+{
+ this->error = errorCode;
+ switch (error) {
+ case TorrentClient::UnknownError:
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "Unknown error");
+ break;
+ case TorrentClient::TorrentParseError:
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "Invalid torrent data");
+ break;
+ case TorrentClient::InvalidTrackerError:
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "Unable to connect to tracker");
+ break;
+ case TorrentClient::FileError:
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "File error");
+ break;
+ case TorrentClient::ServerError:
+ errorString = QT_TRANSLATE_NOOP(TorrentClient, "Unable to initialize server");
+ break;
+ }
+ emit q->error(errorCode);
+}
+
+void TorrentClientPrivate::setState(TorrentClient::State state)
+{
+ this->state = state;
+ switch (state) {
+ case TorrentClient::Idle:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Idle");
+ break;
+ case TorrentClient::Paused:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Paused");
+ break;
+ case TorrentClient::Stopping:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Stopping");
+ break;
+ case TorrentClient::Preparing:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Preparing");
+ break;
+ case TorrentClient::Searching:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Searching");
+ break;
+ case TorrentClient::Connecting:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Connecting");
+ break;
+ case TorrentClient::WarmingUp:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Warming up");
+ break;
+ case TorrentClient::Downloading:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Downloading");
+ break;
+ case TorrentClient::Endgame:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Finishing");
+ break;
+ case TorrentClient::Seeding:
+ stateString = QT_TRANSLATE_NOOP(TorrentClient, "Seeding");
+ break;
+ }
+ emit q->stateChanged(state);
+}
+
+void TorrentClientPrivate::callScheduler()
+{
+ if (!schedulerCalled) {
+ schedulerCalled = true;
+ QMetaObject::invokeMethod(q, "scheduleDownloads", Qt::QueuedConnection);
+ }
+}
+
+void TorrentClientPrivate::callPeerConnector()
+{
+ if (!connectingToClients) {
+ connectingToClients = true;
+ QTimer::singleShot(10000, q, SLOT(connectToPeers()));
+ }
+}
+
+TorrentClient::TorrentClient(QObject *parent)
+ : QObject(parent), d(new TorrentClientPrivate(this))
+{
+ // Connect the file manager
+ connect(&d->fileManager, SIGNAL(dataRead(int, int, int, const QByteArray &)),
+ this, SLOT(sendToPeer(int, int, int, const QByteArray &)));
+ connect(&d->fileManager, SIGNAL(verificationProgress(int)),
+ this, SLOT(updateProgress(int)));
+ connect(&d->fileManager, SIGNAL(verificationDone()),
+ this, SLOT(fullVerificationDone()));
+ connect(&d->fileManager, SIGNAL(pieceVerified(int, bool)),
+ this, SLOT(pieceVerified(int, bool)));
+ connect(&d->fileManager, SIGNAL(error()),
+ this, SLOT(handleFileError()));
+
+ // Connect the tracker client
+ connect(&d->trackerClient, SIGNAL(peerListUpdated(const QList<TorrentPeer> &)),
+ this, SLOT(addToPeerList(const QList<TorrentPeer> &)));
+ connect(&d->trackerClient, SIGNAL(stopped()),
+ this, SIGNAL(stopped()));
+}
+
+TorrentClient::~TorrentClient()
+{
+ qDeleteAll(d->peers);
+ qDeleteAll(d->pendingPieces);
+ delete d;
+}
+
+bool TorrentClient::setTorrent(const QString &fileName)
+{
+ QFile file(fileName);
+ if (!file.open(QIODevice::ReadOnly) || !setTorrent(file.readAll())) {
+ d->setError(TorrentParseError);
+ return false;
+ }
+ return true;
+}
+
+bool TorrentClient::setTorrent(const QByteArray &torrentData)
+{
+ if (!d->metaInfo.parse(torrentData)) {
+ d->setError(TorrentParseError);
+ return false;
+ }
+
+ // Calculate SHA1 hash of the "info" section in the torrent
+ QByteArray infoValue = d->metaInfo.infoValue();
+ d->infoHash = QCryptographicHash::hash(infoValue, QCryptographicHash::Sha1);
+
+ return true;
+}
+
+MetaInfo TorrentClient::metaInfo() const
+{
+ return d->metaInfo;
+}
+
+void TorrentClient::setDestinationFolder(const QString &directory)
+{
+ d->destinationFolder = directory;
+}
+
+QString TorrentClient::destinationFolder() const
+{
+ return d->destinationFolder;
+}
+
+void TorrentClient::setDumpedState(const QByteArray &dumpedState)
+{
+ // Recover partially completed pieces
+ QDataStream stream(dumpedState);
+
+ quint16 version = 0;
+ stream >> version;
+ if (version != 2)
+ return;
+
+ stream >> d->completedPieces;
+
+ while (!stream.atEnd()) {
+ int index;
+ int length;
+ QBitArray completed;
+ stream >> index >> length >> completed;
+ if (stream.status() != QDataStream::Ok) {
+ d->completedPieces.clear();
+ break;
+ }
+
+ TorrentPiece *piece = new TorrentPiece;
+ piece->index = index;
+ piece->length = length;
+ piece->completedBlocks = completed;
+ piece->requestedBlocks.resize(completed.size());
+ piece->inProgress = false;
+ d->pendingPieces[index] = piece;
+ }
+}
+
+QByteArray TorrentClient::dumpedState() const
+{
+ QByteArray partials;
+ QDataStream stream(&partials, QIODevice::WriteOnly);
+
+ stream << quint16(2);
+ stream << d->completedPieces;
+
+ // Save the state of all partially downloaded pieces into a format
+ // suitable for storing in settings.
+ QMap<int, TorrentPiece *>::ConstIterator it = d->pendingPieces.constBegin();
+ while (it != d->pendingPieces.constEnd()) {
+ TorrentPiece *piece = it.value();
+ if (blocksLeftForPiece(piece) > 0 && blocksLeftForPiece(piece) < piece->completedBlocks.size()) {
+ stream << piece->index;
+ stream << piece->length;
+ stream << piece->completedBlocks;
+ }
+ ++it;
+ }
+
+ return partials;
+}
+
+qint64 TorrentClient::progress() const
+{
+ return d->lastProgressValue;
+}
+
+void TorrentClient::setDownloadedBytes(qint64 bytes)
+{
+ d->downloadedBytes = bytes;
+}
+
+qint64 TorrentClient::downloadedBytes() const
+{
+ return d->downloadedBytes;
+}
+
+void TorrentClient::setUploadedBytes(qint64 bytes)
+{
+ d->uploadedBytes = bytes;
+}
+
+qint64 TorrentClient::uploadedBytes() const
+{
+ return d->uploadedBytes;
+}
+
+int TorrentClient::connectedPeerCount() const
+{
+ int tmp = 0;
+ foreach (PeerWireClient *client, d->connections) {
+ if (client->state() == QAbstractSocket::ConnectedState)
+ ++tmp;
+ }
+ return tmp;
+}
+
+int TorrentClient::seedCount() const
+{
+ int tmp = 0;
+ foreach (PeerWireClient *client, d->connections) {
+ if (client->availablePieces().count(true) == d->pieceCount)
+ ++tmp;
+ }
+ return tmp;
+}
+
+TorrentClient::State TorrentClient::state() const
+{
+ return d->state;
+}
+
+QString TorrentClient::stateString() const
+{
+ return d->stateString;
+}
+
+TorrentClient::Error TorrentClient::error() const
+{
+ return d->error;
+}
+
+QString TorrentClient::errorString() const
+{
+ return d->errorString;
+}
+
+QByteArray TorrentClient::peerId() const
+{
+ return d->peerId;
+}
+
+QByteArray TorrentClient::infoHash() const
+{
+ return d->infoHash;
+}
+
+void TorrentClient::start()
+{
+ if (d->state != Idle)
+ return;
+
+ TorrentServer::instance()->addClient(this);
+
+ // Initialize the file manager
+ d->setState(Preparing);
+ d->fileManager.setMetaInfo(d->metaInfo);
+ d->fileManager.setDestinationFolder(d->destinationFolder);
+ d->fileManager.setCompletedPieces(d->completedPieces);
+ d->fileManager.start(QThread::LowestPriority);
+ d->fileManager.startDataVerification();
+}
+
+void TorrentClient::stop()
+{
+ if (d->state == Stopping)
+ return;
+
+ TorrentServer::instance()->removeClient(this);
+
+ // Update the state
+ State oldState = d->state;
+ d->setState(Stopping);
+
+ // Stop the timer
+ if (d->transferRateTimer) {
+ killTimer(d->transferRateTimer);
+ d->transferRateTimer = 0;
+ }
+
+ // Abort all existing connections
+ foreach (PeerWireClient *client, d->connections) {
+ RateController::instance()->removeSocket(client);
+ ConnectionManager::instance()->removeConnection(client);
+ client->abort();
+ }
+ d->connections.clear();
+
+ // Perhaps stop the tracker
+ if (oldState > Preparing) {
+ d->trackerClient.stop();
+ } else {
+ d->setState(Idle);
+ emit stopped();
+ }
+}
+
+void TorrentClient::setPaused(bool paused)
+{
+ if (paused) {
+ // Abort all connections, and set the max number of
+ // connections to 0. Keep the list of peers, so we can quickly
+ // resume later.
+ d->setState(Paused);
+ foreach (PeerWireClient *client, d->connections)
+ client->abort();
+ d->connections.clear();
+ TorrentServer::instance()->removeClient(this);
+ } else {
+ // Restore the max number of connections, and start the peer
+ // connector. We should also quickly start receiving incoming
+ // connections.
+ d->setState(d->completedPieces.count(true) == d->fileManager.pieceCount()
+ ? Seeding : Searching);
+ connectToPeers();
+ TorrentServer::instance()->addClient(this);
+ }
+}
+
+void TorrentClient::timerEvent(QTimerEvent *event)
+{
+ if (event->timerId() == d->uploadScheduleTimer) {
+ // Update the state of who's choked and who's not
+ scheduleUploads();
+ return;
+ }
+
+ if (event->timerId() != d->transferRateTimer) {
+ QObject::timerEvent(event);
+ return;
+ }
+
+ // Calculate average upload/download rate
+ qint64 uploadBytesPerSecond = 0;
+ qint64 downloadBytesPerSecond = 0;
+ for (int i = 0; i < RateControlWindowLength; ++i) {
+ uploadBytesPerSecond += d->uploadRate[i];
+ downloadBytesPerSecond += d->downloadRate[i];
+ }
+ uploadBytesPerSecond /= qint64(RateControlWindowLength);
+ downloadBytesPerSecond /= qint64(RateControlWindowLength);
+ for (int i = RateControlWindowLength - 2; i >= 0; --i) {
+ d->uploadRate[i + 1] = d->uploadRate[i];
+ d->downloadRate[i + 1] = d->downloadRate[i];
+ }
+ d->uploadRate[0] = 0;
+ d->downloadRate[0] = 0;
+ emit uploadRateUpdated(int(uploadBytesPerSecond));
+ emit downloadRateUpdated(int(downloadBytesPerSecond));
+
+ // Stop the timer if there is no activity.
+ if (downloadBytesPerSecond == 0 && uploadBytesPerSecond == 0) {
+ killTimer(d->transferRateTimer);
+ d->transferRateTimer = 0;
+ }
+}
+
+void TorrentClient::sendToPeer(int readId, int pieceIndex, int begin, const QByteArray &data)
+{
+ // Send the requested block to the peer if the client connection
+ // still exists; otherwise do nothing. This slot is called by the
+ // file manager after it has read a block of data.
+ PeerWireClient *client = d->readIds.value(readId);
+ if (client) {
+ if ((client->peerWireState() & PeerWireClient::ChokingPeer) == 0)
+ client->sendBlock(pieceIndex, begin, data);
+ }
+ d->readIds.remove(readId);
+}
+
+void TorrentClient::fullVerificationDone()
+{
+ // Update our list of completed and incomplete pieces.
+ d->completedPieces = d->fileManager.completedPieces();
+ d->incompletePieces.resize(d->completedPieces.size());
+ d->pieceCount = d->completedPieces.size();
+ for (int i = 0; i < d->fileManager.pieceCount(); ++i) {
+ if (!d->completedPieces.testBit(i))
+ d->incompletePieces.setBit(i);
+ }
+
+ updateProgress();
+
+ // If the checksums show that what the dumped state thought was
+ // partial was in fact complete, then we trust the checksums.
+ QMap<int, TorrentPiece *>::Iterator it = d->pendingPieces.begin();
+ while (it != d->pendingPieces.end()) {
+ if (d->completedPieces.testBit(it.key()))
+ it = d->pendingPieces.erase(it);
+ else
+ ++it;
+ }
+
+ d->uploadScheduleTimer = startTimer(UploadScheduleInterval);
+
+ // Start the server
+ TorrentServer *server = TorrentServer::instance();
+ if (!server->isListening()) {
+ // Set up the peer wire server
+ for (int i = ServerMinPort; i <= ServerMaxPort; ++i) {
+ if (server->listen(QHostAddress::Any, i))
+ break;
+ }
+ if (!server->isListening()) {
+ d->setError(ServerError);
+ return;
+ }
+ }
+
+ d->setState(d->completedPieces.count(true) == d->pieceCount ? Seeding : Searching);
+
+ // Start the tracker client
+ d->trackerClient.start(d->metaInfo);
+}
+
+void TorrentClient::pieceVerified(int pieceIndex, bool ok)
+{
+ TorrentPiece *piece = d->pendingPieces.value(pieceIndex);
+
+ // Remove this piece from all payloads
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.begin();
+ while (it != d->payloads.end()) {
+ if (it.value()->index == pieceIndex)
+ it = d->payloads.erase(it);
+ else
+ ++it;
+ }
+
+ if (!ok) {
+ // If a piece did not pass the SHA1 check, we'll simply clear
+ // its state, and the scheduler will re-request it
+ piece->inProgress = false;
+ piece->completedBlocks.fill(false);
+ piece->requestedBlocks.fill(false);
+ d->callScheduler();
+ return;
+ }
+
+ // Update the peer list so we know who's still interesting.
+ foreach (TorrentPeer *peer, d->peers) {
+ if (!peer->interesting)
+ continue;
+ bool interesting = false;
+ for (int i = 0; i < d->pieceCount; ++i) {
+ if (peer->pieces.testBit(i) && d->incompletePieces.testBit(i)) {
+ interesting = true;
+ break;
+ }
+ }
+ peer->interesting = interesting;
+ }
+
+ // Delete the piece and update our structures.
+ delete piece;
+ d->pendingPieces.remove(pieceIndex);
+ d->completedPieces.setBit(pieceIndex);
+ d->incompletePieces.clearBit(pieceIndex);
+
+ // Notify connected peers.
+ foreach (PeerWireClient *client, d->connections) {
+ if (client->state() == QAbstractSocket::ConnectedState
+ && !client->availablePieces().testBit(pieceIndex)) {
+ client->sendPieceNotification(pieceIndex);
+ }
+ }
+
+ // Notify the tracker if we've entered Seeding status; otherwise
+ // call the scheduler.
+ int completed = d->completedPieces.count(true);
+ if (completed == d->pieceCount) {
+ if (d->state != Seeding) {
+ d->setState(Seeding);
+ d->trackerClient.startSeeding();
+ }
+ } else {
+ if (completed == 1)
+ d->setState(Downloading);
+ else if (d->incompletePieces.count(true) < 5 && d->pendingPieces.size() > d->incompletePieces.count(true))
+ d->setState(Endgame);
+ d->callScheduler();
+ }
+
+ updateProgress();
+}
+
+void TorrentClient::handleFileError()
+{
+ if (d->state == Paused)
+ return;
+ setPaused(true);
+ emit error(FileError);
+}
+
+void TorrentClient::connectToPeers()
+{
+ d->connectingToClients = false;
+
+ if (d->state == Stopping || d->state == Idle || d->state == Paused)
+ return;
+
+ if (d->state == Searching)
+ d->setState(Connecting);
+
+ // Find the list of peers we are not currently connected to, where
+ // the more interesting peers are listed more than once.
+ QList<TorrentPeer *> weighedPeers = weighedFreePeers();
+
+ // Start as many connections as we can
+ while (!weighedPeers.isEmpty() && ConnectionManager::instance()->canAddConnection()
+ && (qrand() % (ConnectionManager::instance()->maxConnections() / 2))) {
+ PeerWireClient *client = new PeerWireClient(ConnectionManager::instance()->clientId(), this);
+ RateController::instance()->addSocket(client);
+ ConnectionManager::instance()->addConnection(client);
+
+ initializeConnection(client);
+ d->connections << client;
+
+ // Pick a random peer from the list of weighed peers.
+ TorrentPeer *peer = weighedPeers.takeAt(qrand() % weighedPeers.size());
+ weighedPeers.removeAll(peer);
+ peer->connectStart = QDateTime::currentDateTime().toTime_t();
+ peer->lastVisited = peer->connectStart;
+
+ // Connect to the peer.
+ client->setPeer(peer);
+ client->connectToHost(peer->address, peer->port);
+ }
+}
+
+QList<TorrentPeer *> TorrentClient::weighedFreePeers() const
+{
+ QList<TorrentPeer *> weighedPeers;
+
+ // Generate a list of peers that we want to connect to.
+ uint now = QDateTime::currentDateTime().toTime_t();
+ QList<TorrentPeer *> freePeers;
+ QMap<QString, int> connectionsPerPeer;
+ foreach (TorrentPeer *peer, d->peers) {
+ bool busy = false;
+ foreach (PeerWireClient *client, d->connections) {
+ if (client->state() == PeerWireClient::ConnectedState
+ && client->peerAddress() == peer->address
+ && client->peerPort() == peer->port) {
+ if (++connectionsPerPeer[peer->address.toString()] >= MaxConnectionPerPeer) {
+ busy = true;
+ break;
+ }
+ }
+ }
+ if (!busy && (now - peer->lastVisited) > uint(MinimumTimeBeforeRevisit))
+ freePeers << peer;
+ }
+
+ // Nothing to connect to
+ if (freePeers.isEmpty())
+ return weighedPeers;
+
+ // Assign points based on connection speed and pieces available.
+ QList<QPair<int, TorrentPeer *> > points;
+ foreach (TorrentPeer *peer, freePeers) {
+ int tmp = 0;
+ if (peer->interesting) {
+ tmp += peer->numCompletedPieces;
+ if (d->state == Seeding)
+ tmp = d->pieceCount - tmp;
+ if (!peer->connectStart) // An unknown peer is as interesting as a seed
+ tmp += d->pieceCount;
+
+ // 1/5 of the total score for each second below 5 it takes to
+ // connect.
+ if (peer->connectTime < 5)
+ tmp += (d->pieceCount / 10) * (5 - peer->connectTime);
+ }
+ points << QPair<int, TorrentPeer *>(tmp, peer);
+ }
+ qSort(points);
+
+ // Minimize the list so the point difference is never more than 1.
+ typedef QPair<int,TorrentPeer*> PointPair;
+ QMultiMap<int, TorrentPeer *> pointMap;
+ int lowestScore = 0;
+ int lastIndex = 0;
+ foreach (PointPair point, points) {
+ if (point.first > lowestScore) {
+ lowestScore = point.first;
+ ++lastIndex;
+ }
+ pointMap.insert(lastIndex, point.second);
+ }
+
+ // Now make up a list of peers where the ones with more points are
+ // listed many times.
+ QMultiMap<int, TorrentPeer *>::ConstIterator it = pointMap.constBegin();
+ while (it != pointMap.constEnd()) {
+ for (int i = 0; i < it.key() + 1; ++i)
+ weighedPeers << it.value();
+ ++it;
+ }
+
+ return weighedPeers;
+}
+
+void TorrentClient::setupIncomingConnection(PeerWireClient *client)
+{
+ // Connect signals
+ initializeConnection(client);
+
+ // Initialize this client
+ RateController::instance()->addSocket(client);
+ d->connections << client;
+
+ client->initialize(d->infoHash, d->pieceCount);
+ client->sendPieceList(d->completedPieces);
+
+ emit peerInfoUpdated();
+
+ if (d->state == Searching || d->state == Connecting) {
+ int completed = d->completedPieces.count(true);
+ if (completed == 0)
+ d->setState(WarmingUp);
+ else if (d->incompletePieces.count(true) < 5 && d->pendingPieces.size() > d->incompletePieces.count(true))
+ d->setState(Endgame);
+ }
+
+ if (d->connections.isEmpty())
+ scheduleUploads();
+}
+
+void TorrentClient::setupOutgoingConnection()
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+
+ // Update connection statistics.
+ foreach (TorrentPeer *peer, d->peers) {
+ if (peer->port == client->peerPort() && peer->address == client->peerAddress()) {
+ peer->connectTime = peer->lastVisited - peer->connectStart;
+ break;
+ }
+ }
+
+ // Send handshake and piece list
+ client->initialize(d->infoHash, d->pieceCount);
+ client->sendPieceList(d->completedPieces);
+
+ emit peerInfoUpdated();
+
+ if (d->state == Searching || d->state == Connecting) {
+ int completed = d->completedPieces.count(true);
+ if (completed == 0)
+ d->setState(WarmingUp);
+ else if (d->incompletePieces.count(true) < 5 && d->pendingPieces.size() > d->incompletePieces.count(true))
+ d->setState(Endgame);
+ }
+}
+
+void TorrentClient::initializeConnection(PeerWireClient *client)
+{
+ connect(client, SIGNAL(connected()),
+ this, SLOT(setupOutgoingConnection()));
+ connect(client, SIGNAL(disconnected()),
+ this, SLOT(removeClient()));
+ connect(client, SIGNAL(error(QAbstractSocket::SocketError)),
+ this, SLOT(removeClient()));
+ connect(client, SIGNAL(piecesAvailable(const QBitArray &)),
+ this, SLOT(peerPiecesAvailable(const QBitArray &)));
+ connect(client, SIGNAL(blockRequested(int, int, int)),
+ this, SLOT(peerRequestsBlock(int, int, int)));
+ connect(client, SIGNAL(blockReceived(int, int, const QByteArray &)),
+ this, SLOT(blockReceived(int, int, const QByteArray &)));
+ connect(client, SIGNAL(choked()),
+ this, SLOT(peerChoked()));
+ connect(client, SIGNAL(unchoked()),
+ this, SLOT(peerUnchoked()));
+ connect(client, SIGNAL(bytesWritten(qint64)),
+ this, SLOT(peerWireBytesWritten(qint64)));
+ connect(client, SIGNAL(bytesReceived(qint64)),
+ this, SLOT(peerWireBytesReceived(qint64)));
+}
+
+void TorrentClient::removeClient()
+{
+ PeerWireClient *client = static_cast<PeerWireClient *>(sender());
+
+ // Remove the host from our list of known peers if the connection
+ // failed.
+ if (client->peer() && client->error() == QAbstractSocket::ConnectionRefusedError)
+ d->peers.removeAll(client->peer());
+
+ // Remove the client from RateController and all structures.
+ RateController::instance()->removeSocket(client);
+ d->connections.removeAll(client);
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.find(client);
+ while (it != d->payloads.end() && it.key() == client) {
+ TorrentPiece *piece = it.value();
+ piece->inProgress = false;
+ piece->requestedBlocks.fill(false);
+ it = d->payloads.erase(it);
+ }
+
+ // Remove pending read requests.
+ QMapIterator<int, PeerWireClient *> it2(d->readIds);
+ while (it2.findNext(client))
+ d->readIds.remove(it2.key());
+
+ // Delete the client later.
+ disconnect(client, SIGNAL(disconnected()), this, SLOT(removeClient()));
+ client->deleteLater();
+ ConnectionManager::instance()->removeConnection(client);
+
+ emit peerInfoUpdated();
+ d->callPeerConnector();
+}
+
+void TorrentClient::peerPiecesAvailable(const QBitArray &pieces)
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+
+ // Find the peer in our list of announced peers. If it's there,
+ // then we can use the piece list into to gather statistics that
+ // help us decide what peers to connect to.
+ TorrentPeer *peer = 0;
+ QList<TorrentPeer *>::Iterator it = d->peers.begin();
+ while (it != d->peers.end()) {
+ if ((*it)->address == client->peerAddress() && (*it)->port == client->peerPort()) {
+ peer = *it;
+ break;
+ }
+ ++it;
+ }
+
+ // If the peer is a seed, and we are in seeding mode, then the
+ // peer is uninteresting.
+ if (pieces.count(true) == d->pieceCount) {
+ if (peer)
+ peer->seed = true;
+ emit peerInfoUpdated();
+ if (d->state == Seeding) {
+ client->abort();
+ return;
+ } else {
+ if (peer)
+ peer->interesting = true;
+ if ((client->peerWireState() & PeerWireClient::InterestedInPeer) == 0)
+ client->sendInterested();
+ d->callScheduler();
+ return;
+ }
+ }
+
+ // Update our list of available pieces.
+ if (peer) {
+ peer->pieces = pieces;
+ peer->numCompletedPieces = pieces.count(true);
+ }
+
+ // Check for interesting pieces, and tell the peer whether we are
+ // interested or not.
+ bool interested = false;
+ int piecesSize = pieces.size();
+ for (int pieceIndex = 0; pieceIndex < piecesSize; ++pieceIndex) {
+ if (!pieces.testBit(pieceIndex))
+ continue;
+ if (!d->completedPieces.testBit(pieceIndex)) {
+ interested = true;
+ if ((client->peerWireState() & PeerWireClient::InterestedInPeer) == 0) {
+ if (peer)
+ peer->interesting = true;
+ client->sendInterested();
+ }
+
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.find(client);
+ int inProgress = 0;
+ while (it != d->payloads.end() && it.key() == client) {
+ if (it.value()->inProgress)
+ inProgress += it.value()->requestedBlocks.count(true);
+ ++it;
+ }
+ if (!inProgress)
+ d->callScheduler();
+ break;
+ }
+ }
+ if (!interested && (client->peerWireState() & PeerWireClient::InterestedInPeer)) {
+ if (peer)
+ peer->interesting = false;
+ client->sendNotInterested();
+ }
+}
+
+void TorrentClient::peerRequestsBlock(int pieceIndex, int begin, int length)
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+
+ // Silently ignore requests from choked peers
+ if (client->peerWireState() & PeerWireClient::ChokingPeer)
+ return;
+
+ // Silently ignore requests for pieces we don't have.
+ if (!d->completedPieces.testBit(pieceIndex))
+ return;
+
+ // Request the block from the file manager
+ d->readIds.insert(d->fileManager.read(pieceIndex, begin, length),
+ qobject_cast<PeerWireClient *>(sender()));
+}
+
+void TorrentClient::blockReceived(int pieceIndex, int begin, const QByteArray &data)
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+ if (data.size() == 0) {
+ client->abort();
+ return;
+ }
+
+ // Ignore it if we already have this block.
+ int blockBit = begin / BlockSize;
+ TorrentPiece *piece = d->pendingPieces.value(pieceIndex);
+ if (!piece || piece->completedBlocks.testBit(blockBit)) {
+ // Discard blocks that we already have, and fill up the pipeline.
+ requestMore(client);
+ return;
+ }
+
+ // If we are in warmup or endgame mode, cancel all duplicate
+ // requests for this block.
+ if (d->state == WarmingUp || d->state == Endgame) {
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.begin();
+ while (it != d->payloads.end()) {
+ PeerWireClient *otherClient = it.key();
+ if (otherClient != client && it.value()->index == pieceIndex) {
+ if (otherClient->incomingBlocks().contains(TorrentBlock(pieceIndex, begin, data.size())))
+ it.key()->cancelRequest(pieceIndex, begin, data.size());
+ }
+ ++it;
+ }
+ }
+
+ if (d->state != Downloading && d->state != Endgame && d->completedPieces.count(true) > 0)
+ d->setState(Downloading);
+
+ // Store this block
+ d->fileManager.write(pieceIndex, begin, data);
+ piece->completedBlocks.setBit(blockBit);
+ piece->requestedBlocks.clearBit(blockBit);
+
+ if (blocksLeftForPiece(piece) == 0) {
+ // Ask the file manager to verify the newly downloaded piece
+ d->fileManager.verifyPiece(piece->index);
+
+ // Remove this piece from all payloads
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.begin();
+ while (it != d->payloads.end()) {
+ if (!it.value() || it.value()->index == piece->index)
+ it = d->payloads.erase(it);
+ else
+ ++it;
+ }
+ }
+
+ // Fill up the pipeline.
+ requestMore(client);
+}
+
+void TorrentClient::peerWireBytesWritten(qint64 size)
+{
+ if (!d->transferRateTimer)
+ d->transferRateTimer = startTimer(RateControlTimerDelay);
+
+ d->uploadRate[0] += size;
+ d->uploadedBytes += size;
+ emit dataSent(size);
+}
+
+void TorrentClient::peerWireBytesReceived(qint64 size)
+{
+ if (!d->transferRateTimer)
+ d->transferRateTimer = startTimer(RateControlTimerDelay);
+
+ d->downloadRate[0] += size;
+ d->downloadedBytes += size;
+ emit dataSent(size);
+}
+
+int TorrentClient::blocksLeftForPiece(const TorrentPiece *piece) const
+{
+ int blocksLeft = 0;
+ int completedBlocksSize = piece->completedBlocks.size();
+ for (int i = 0; i < completedBlocksSize; ++i) {
+ if (!piece->completedBlocks.testBit(i))
+ ++blocksLeft;
+ }
+ return blocksLeft;
+}
+
+void TorrentClient::scheduleUploads()
+{
+ // Generate a list of clients sorted by their transfer
+ // speeds. When leeching, we sort by download speed, and when
+ // seeding, we sort by upload speed. Seeds are left out; there's
+ // no use in unchoking them.
+ QList<PeerWireClient *> allClients = d->connections;
+ QMultiMap<int, PeerWireClient *> transferSpeeds;
+ foreach (PeerWireClient *client, allClients) {
+ if (client->state() == QAbstractSocket::ConnectedState
+ && client->availablePieces().count(true) != d->pieceCount) {
+ if (d->state == Seeding) {
+ transferSpeeds.insert(client->uploadSpeed(), client);
+ } else {
+ transferSpeeds.insert(client->downloadSpeed(), client);
+ }
+ }
+ }
+
+ // Unchoke the top 'MaxUploads' downloaders (peers that we are
+ // uploading to) and choke all others.
+ int maxUploaders = MaxUploads;
+ QMapIterator<int, PeerWireClient *> it(transferSpeeds);
+ it.toBack();
+ while (it.hasPrevious()) {
+ PeerWireClient *client = it.previous().value();
+ bool interested = (client->peerWireState() & PeerWireClient::PeerIsInterested);
+
+ if (maxUploaders) {
+ allClients.removeAll(client);
+ if (client->peerWireState() & PeerWireClient::ChokingPeer)
+ client->unchokePeer();
+ --maxUploaders;
+ continue;
+ }
+
+ if ((client->peerWireState() & PeerWireClient::ChokingPeer) == 0) {
+ if ((qrand() % 10) == 0)
+ client->abort();
+ else
+ client->chokePeer();
+ allClients.removeAll(client);
+ }
+ if (!interested)
+ allClients.removeAll(client);
+ }
+
+ // Only interested peers are left in allClients. Unchoke one
+ // random peer to allow it to compete for a position among the
+ // downloaders. (This is known as an "optimistic unchoke".)
+ if (!allClients.isEmpty()) {
+ PeerWireClient *client = allClients[qrand() % allClients.size()];
+ if (client->peerWireState() & PeerWireClient::ChokingPeer)
+ client->unchokePeer();
+ }
+}
+
+void TorrentClient::scheduleDownloads()
+{
+ d->schedulerCalled = false;
+
+ if (d->state == Stopping || d->state == Paused || d->state == Idle)
+ return;
+
+ // Check what each client is doing, and assign payloads to those
+ // who are either idle or done.
+ foreach (PeerWireClient *client, d->connections)
+ schedulePieceForClient(client);
+}
+
+void TorrentClient::schedulePieceForClient(PeerWireClient *client)
+{
+ // Only schedule connected clients.
+ if (client->state() != QTcpSocket::ConnectedState)
+ return;
+
+ // The peer has choked us; try again later.
+ if (client->peerWireState() & PeerWireClient::ChokedByPeer)
+ return;
+
+ // Make a list of all the client's pending pieces, and count how
+ // many blocks have been requested.
+ QList<int> currentPieces;
+ bool somePiecesAreNotInProgress = false;
+ TorrentPiece *lastPendingPiece = 0;
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.find(client);
+ while (it != d->payloads.end() && it.key() == client) {
+ lastPendingPiece = it.value();
+ if (lastPendingPiece->inProgress) {
+ currentPieces << lastPendingPiece->index;
+ } else {
+ somePiecesAreNotInProgress = true;
+ }
+ ++it;
+ }
+
+ // Skip clients that already have too many blocks in progress.
+ if (client->incomingBlocks().size() >= ((d->state == Endgame || d->state == WarmingUp)
+ ? MaxBlocksInMultiMode : MaxBlocksInProgress))
+ return;
+
+ // If all pieces are in progress, but we haven't filled up our
+ // block requesting quota, then we need to schedule another piece.
+ if (!somePiecesAreNotInProgress || client->incomingBlocks().size() > 0)
+ lastPendingPiece = 0;
+ TorrentPiece *piece = lastPendingPiece;
+
+ // In warmup state, all clients request blocks from the same pieces.
+ if (d->state == WarmingUp && d->pendingPieces.size() >= 4) {
+ piece = d->payloads.value(client);
+ if (!piece) {
+ QList<TorrentPiece *> values = d->pendingPieces.values();
+ piece = values.value(qrand() % values.size());
+ piece->inProgress = true;
+ d->payloads.insert(client, piece);
+ }
+ if (piece->completedBlocks.count(false) == client->incomingBlocks().size())
+ return;
+ }
+
+ // If no pieces are currently in progress, schedule a new one.
+ if (!piece) {
+ // Build up a list of what pieces that we have not completed
+ // are available to this client.
+ QBitArray incompletePiecesAvailableToClient = d->incompletePieces;
+
+ // Remove all pieces that are marked as being in progress
+ // already (i.e., pieces that this or other clients are
+ // already waiting for). A special rule applies to warmup and
+ // endgame mode; there, we allow several clients to request
+ // the same piece. In endgame mode, this only applies to
+ // clients that are currently uploading (more than 1.0KB/s).
+ if ((d->state == Endgame && client->uploadSpeed() < 1024) || d->state != WarmingUp) {
+ QMap<int, TorrentPiece *>::ConstIterator it = d->pendingPieces.constBegin();
+ while (it != d->pendingPieces.constEnd()) {
+ if (it.value()->inProgress)
+ incompletePiecesAvailableToClient.clearBit(it.key());
+ ++it;
+ }
+ }
+
+ // Remove all pieces that the client cannot download.
+ incompletePiecesAvailableToClient &= client->availablePieces();
+
+ // Remove all pieces that this client has already requested.
+ foreach (int i, currentPieces)
+ incompletePiecesAvailableToClient.clearBit(i);
+
+ // Only continue if more pieces can be scheduled. If no pieces
+ // are available and no blocks are in progress, just leave
+ // the connection idle; it might become interesting later.
+ if (incompletePiecesAvailableToClient.count(true) == 0)
+ return;
+
+ // Check if any of the partially completed pieces can be
+ // recovered, and if so, pick a random one of them.
+ QList<TorrentPiece *> partialPieces;
+ QMap<int, TorrentPiece *>::ConstIterator it = d->pendingPieces.constBegin();
+ while (it != d->pendingPieces.constEnd()) {
+ TorrentPiece *tmp = it.value();
+ if (incompletePiecesAvailableToClient.testBit(it.key())) {
+ if (!tmp->inProgress || d->state == WarmingUp || d->state == Endgame) {
+ partialPieces << tmp;
+ break;
+ }
+ }
+ ++it;
+ }
+ if (!partialPieces.isEmpty())
+ piece = partialPieces.value(qrand() % partialPieces.size());
+
+ if (!piece) {
+ // Pick a random piece 3 out of 4 times; otherwise, pick either
+ // one of the most common or the least common pieces available,
+ // depending on the state we're in.
+ int pieceIndex = 0;
+ if (d->state == WarmingUp || (qrand() & 4) == 0) {
+ int *occurrances = new int[d->pieceCount];
+ memset(occurrances, 0, d->pieceCount * sizeof(int));
+
+ // Count how many of each piece are available.
+ foreach (PeerWireClient *peer, d->connections) {
+ QBitArray peerPieces = peer->availablePieces();
+ int peerPiecesSize = peerPieces.size();
+ for (int i = 0; i < peerPiecesSize; ++i) {
+ if (peerPieces.testBit(i))
+ ++occurrances[i];
+ }
+ }
+
+ // Find the rarest or most common pieces.
+ int numOccurrances = d->state == WarmingUp ? 0 : 99999;
+ QList<int> piecesReadyForDownload;
+ for (int i = 0; i < d->pieceCount; ++i) {
+ if (d->state == WarmingUp) {
+ // Add common pieces
+ if (occurrances[i] >= numOccurrances
+ && incompletePiecesAvailableToClient.testBit(i)) {
+ if (occurrances[i] > numOccurrances)
+ piecesReadyForDownload.clear();
+ piecesReadyForDownload.append(i);
+ numOccurrances = occurrances[i];
+ }
+ } else {
+ // Add rare pieces
+ if (occurrances[i] <= numOccurrances
+ && incompletePiecesAvailableToClient.testBit(i)) {
+ if (occurrances[i] < numOccurrances)
+ piecesReadyForDownload.clear();
+ piecesReadyForDownload.append(i);
+ numOccurrances = occurrances[i];
+ }
+ }
+ }
+
+ // Select one piece randomly
+ pieceIndex = piecesReadyForDownload.at(qrand() % piecesReadyForDownload.size());
+ delete [] occurrances;
+ } else {
+ // Make up a list of available piece indices, and pick
+ // a random one.
+ QList<int> values;
+ int incompletePiecesAvailableToClientSize = incompletePiecesAvailableToClient.size();
+ for (int i = 0; i < incompletePiecesAvailableToClientSize; ++i) {
+ if (incompletePiecesAvailableToClient.testBit(i))
+ values << i;
+ }
+ pieceIndex = values.at(qrand() % values.size());
+ }
+
+ // Create a new TorrentPiece and fill in all initial
+ // properties.
+ piece = new TorrentPiece;
+ piece->index = pieceIndex;
+ piece->length = d->fileManager.pieceLengthAt(pieceIndex);
+ int numBlocks = piece->length / BlockSize;
+ if (piece->length % BlockSize)
+ ++numBlocks;
+ piece->completedBlocks.resize(numBlocks);
+ piece->requestedBlocks.resize(numBlocks);
+ d->pendingPieces.insert(pieceIndex, piece);
+ }
+
+ piece->inProgress = true;
+ d->payloads.insert(client, piece);
+ }
+
+ // Request more blocks from all pending pieces.
+ requestMore(client);
+}
+
+void TorrentClient::requestMore(PeerWireClient *client)
+{
+ // Make a list of all pieces this client is currently waiting for,
+ // and count the number of blocks in progress.
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.find(client);
+ int numBlocksInProgress = client->incomingBlocks().size();
+ QList<TorrentPiece *> piecesInProgress;
+ while (it != d->payloads.end() && it.key() == client) {
+ TorrentPiece *piece = it.value();
+ if (piece->inProgress || (d->state == WarmingUp || d->state == Endgame))
+ piecesInProgress << piece;
+ ++it;
+ }
+
+ // If no pieces are in progress, call the scheduler.
+ if (piecesInProgress.isEmpty() && d->incompletePieces.count(true)) {
+ d->callScheduler();
+ return;
+ }
+
+ // If too many pieces are in progress, there's nothing to do.
+ int maxInProgress = ((d->state == Endgame || d->state == WarmingUp)
+ ? MaxBlocksInMultiMode : MaxBlocksInProgress);
+ if (numBlocksInProgress == maxInProgress)
+ return;
+
+ // Starting with the first piece that we're waiting for, request
+ // blocks until the quota is filled up.
+ foreach (TorrentPiece *piece, piecesInProgress) {
+ numBlocksInProgress += requestBlocks(client, piece, maxInProgress - numBlocksInProgress);
+ if (numBlocksInProgress == maxInProgress)
+ break;
+ }
+
+ // If we still didn't fill up the quota, we need to schedule more
+ // pieces.
+ if (numBlocksInProgress < maxInProgress && d->state != WarmingUp)
+ d->callScheduler();
+}
+
+int TorrentClient::requestBlocks(PeerWireClient *client, TorrentPiece *piece, int maxBlocks)
+{
+ // Generate the list of incomplete blocks for this piece.
+ QVector<int> bits;
+ int completedBlocksSize = piece->completedBlocks.size();
+ for (int i = 0; i < completedBlocksSize; ++i) {
+ if (!piece->completedBlocks.testBit(i) && !piece->requestedBlocks.testBit(i))
+ bits << i;
+ }
+
+ // Nothing more to request.
+ if (bits.size() == 0) {
+ if (d->state != WarmingUp && d->state != Endgame)
+ return 0;
+ bits.clear();
+ for (int i = 0; i < completedBlocksSize; ++i) {
+ if (!piece->completedBlocks.testBit(i))
+ bits << i;
+ }
+ }
+
+ if (d->state == WarmingUp || d->state == Endgame) {
+ // By randomizing the list of blocks to request, we
+ // significantly speed up the warmup and endgame modes, where
+ // the same blocks are requested from multiple peers. The
+ // speedup comes from an increased chance of receiving
+ // different blocks from the different peers.
+ for (int i = 0; i < bits.size(); ++i) {
+ int a = qrand() % bits.size();
+ int b = qrand() % bits.size();
+ int tmp = bits[a];
+ bits[a] = bits[b];
+ bits[b] = tmp;
+ }
+ }
+
+ // Request no more blocks than we've been asked to.
+ int blocksToRequest = qMin(maxBlocks, bits.size());
+
+ // Calculate the offset and size of each block, and send requests.
+ for (int i = 0; i < blocksToRequest; ++i) {
+ int blockSize = BlockSize;
+ if ((piece->length % BlockSize) && bits.at(i) == completedBlocksSize - 1)
+ blockSize = piece->length % BlockSize;
+ client->requestBlock(piece->index, bits.at(i) * BlockSize, blockSize);
+ piece->requestedBlocks.setBit(bits.at(i));
+ }
+
+ return blocksToRequest;
+}
+
+void TorrentClient::peerChoked()
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+ if (!client)
+ return;
+
+ // When the peer chokes us, we immediately forget about all blocks
+ // we've requested from it. We also remove the piece from out
+ // payload, making it available to other clients.
+ QMultiMap<PeerWireClient *, TorrentPiece *>::Iterator it = d->payloads.find(client);
+ while (it != d->payloads.end() && it.key() == client) {
+ it.value()->inProgress = false;
+ it.value()->requestedBlocks.fill(false);
+ it = d->payloads.erase(it);
+ }
+}
+
+void TorrentClient::peerUnchoked()
+{
+ PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
+ if (!client)
+ return;
+
+ // We got unchoked, which means we can request more blocks.
+ if (d->state != Seeding)
+ d->callScheduler();
+}
+
+void TorrentClient::addToPeerList(const QList<TorrentPeer> &peerList)
+{
+ // Add peers we don't already know of to our list of peers.
+ QList<QHostAddress> addresses = QNetworkInterface::allAddresses();
+ foreach (TorrentPeer peer, peerList) {
+ if (addresses.contains(peer.address)
+ && peer.port == TorrentServer::instance()->serverPort()) {
+ // Skip our own server.
+ continue;
+ }
+
+ bool known = false;
+ foreach (TorrentPeer *knownPeer, d->peers) {
+ if (knownPeer->port == peer.port
+ && knownPeer->address == peer.address) {
+ known = true;
+ break;
+ }
+ }
+ if (!known) {
+ TorrentPeer *newPeer = new TorrentPeer;
+ *newPeer = peer;
+ newPeer->interesting = true;
+ newPeer->seed = false;
+ newPeer->lastVisited = 0;
+ newPeer->connectStart = 0;
+ newPeer->connectTime = 999999;
+ newPeer->pieces.resize(d->pieceCount);
+ newPeer->numCompletedPieces = 0;
+ d->peers << newPeer;
+ }
+ }
+
+ // If we've got more peers than we can connect to, we remove some
+ // of the peers that have no (or low) activity.
+ int maxPeers = ConnectionManager::instance()->maxConnections() * 3;
+ if (d->peers.size() > maxPeers) {
+ // Find what peers are currently connected & active
+ QSet<TorrentPeer *> activePeers;
+ foreach (TorrentPeer *peer, d->peers) {
+ foreach (PeerWireClient *client, d->connections) {
+ if (client->peer() == peer && (client->downloadSpeed() + client->uploadSpeed()) > 1024)
+ activePeers << peer;
+ }
+ }
+
+ // Remove inactive peers from the peer list until we're below
+ // the max connections count.
+ QList<int> toRemove;
+ for (int i = 0; i < d->peers.size() && (d->peers.size() - toRemove.size()) > maxPeers; ++i) {
+ if (!activePeers.contains(d->peers.at(i)))
+ toRemove << i;
+ }
+ QListIterator<int> toRemoveIterator(toRemove);
+ toRemoveIterator.toBack();
+ while (toRemoveIterator.hasPrevious())
+ d->peers.removeAt(toRemoveIterator.previous());
+
+ // If we still have too many peers, remove the oldest ones.
+ while (d->peers.size() > maxPeers)
+ d->peers.takeFirst();
+ }
+
+ if (d->state != Paused && d->state != Stopping && d->state != Idle) {
+ if (d->state == Searching || d->state == WarmingUp)
+ connectToPeers();
+ else
+ d->callPeerConnector();
+ }
+}
+
+void TorrentClient::trackerStopped()
+{
+ d->setState(Idle);
+ emit stopped();
+}
+
+void TorrentClient::updateProgress(int progress)
+{
+ if (progress == -1 && d->pieceCount > 0) {
+ int newProgress = (d->completedPieces.count(true) * 100) / d->pieceCount;
+ if (d->lastProgressValue != newProgress) {
+ d->lastProgressValue = newProgress;
+ emit progressUpdated(newProgress);
+ }
+ } else if (d->lastProgressValue != progress) {
+ d->lastProgressValue = progress;
+ emit progressUpdated(progress);
+ }
+}