summaryrefslogtreecommitdiff
path: root/examples/network/torrent/torrentclient.h
blob: 2da1f6bc8dd43c3bfa6c168b19fe6093f2a033e1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
/****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef TORRENTCLIENT_H
#define TORRENTCLIENT_H

#include <QBitArray>
#include <QHostAddress>
#include <QList>

class MetaInfo;
class PeerWireClient;
class TorrentClientPrivate;
class TorrentPeer;
class 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 = 0);
    ~TorrentClient();

    bool setTorrent(const QString &fileName);
    bool setTorrent(const QByteArray &torrentData);
    MetaInfo metaInfo() const;

    void setMaxConnections(int connections);
    int maxConnections() 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);

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