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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef TORRENTCLIENT_H
#define TORRENTCLIENT_H
#include <QBitArray>
#include <QHostAddress>
#include <QList>
class MetaInfo;
class PeerWireClient;
class TorrentClientPrivate;
struct TorrentPiece;
QT_BEGIN_NAMESPACE
class QTimerEvent;
QT_END_NAMESPACE
class TorrentPeer {
public:
QHostAddress address;
quint16 port;
QString id;
bool interesting;
bool seed;
uint lastVisited;
uint connectStart;
uint connectTime;
QBitArray pieces;
int numCompletedPieces;
inline bool operator==(const TorrentPeer &other)
{
return port == other.port
&& address == other.address
&& id == other.id;
}
};
class TorrentClient : public QObject
{
Q_OBJECT
public:
enum State {
Idle,
Paused,
Stopping,
Preparing,
Searching,
Connecting,
WarmingUp,
Downloading,
Endgame,
Seeding
};
enum Error {
UnknownError,
TorrentParseError,
InvalidTrackerError,
FileError,
ServerError
};
TorrentClient(QObject *parent = nullptr);
~TorrentClient();
bool setTorrent(const QString &fileName);
bool setTorrent(const QByteArray &torrentData);
MetaInfo metaInfo() const;
void setDestinationFolder(const QString &directory);
QString destinationFolder() const;
void setDumpedState(const QByteArray &dumpedState);
QByteArray dumpedState() const;
// Progress and stats for download feedback.
qint64 progress() const;
void setDownloadedBytes(qint64 bytes);
qint64 downloadedBytes() const;
void setUploadedBytes(qint64 bytes);
qint64 uploadedBytes() const;
int connectedPeerCount() const;
int seedCount() const;
// Accessors for the tracker
QByteArray peerId() const;
QByteArray infoHash() const;
quint16 serverPort() const;
// State and error.
State state() const;
QString stateString() const;
Error error() const;
QString errorString() const;
signals:
void stateChanged(TorrentClient::State state);
void error(TorrentClient::Error error);
void downloadCompleted();
void peerInfoUpdated();
void dataSent(int uploadedBytes);
void dataReceived(int downloadedBytes);
void progressUpdated(int percentProgress);
void downloadRateUpdated(int bytesPerSecond);
void uploadRateUpdated(int bytesPerSecond);
void stopped();
public slots:
void start();
void stop();
void setPaused(bool paused);
void setupIncomingConnection(PeerWireClient *client);
protected slots:
void timerEvent(QTimerEvent *event) override;
private slots:
// File management
void sendToPeer(int readId, int pieceIndex, int begin, const QByteArray &data);
void fullVerificationDone();
void pieceVerified(int pieceIndex, bool ok);
void handleFileError();
// Connection handling
void connectToPeers();
QList<TorrentPeer *> weighedFreePeers() const;
void setupOutgoingConnection();
void initializeConnection(PeerWireClient *client);
void removeClient();
void peerPiecesAvailable(const QBitArray &pieces);
void peerRequestsBlock(int pieceIndex, int begin, int length);
void blockReceived(int pieceIndex, int begin, const QByteArray &data);
void peerWireBytesWritten(qint64 bytes);
void peerWireBytesReceived(qint64 bytes);
int blocksLeftForPiece(const TorrentPiece *piece) const;
// Scheduling
void scheduleUploads();
void scheduleDownloads();
void schedulePieceForClient(PeerWireClient *client);
void requestMore(PeerWireClient *client);
int requestBlocks(PeerWireClient *client, TorrentPiece *piece, int maxBlocks);
void peerChoked();
void peerUnchoked();
// Tracker handling
void addToPeerList(const QList<TorrentPeer> &peerList);
void trackerStopped();
// Progress
void updateProgress(int progress = -1);
private:
TorrentClientPrivate *d;
friend class TorrentClientPrivate;
};
#endif
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