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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 209 insertions, 0 deletions

diff --git a/examples/network/torrent/peerwireclient.h b/examples/network/torrent/peerwireclient.h
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+++ b/examples/network/torrent/peerwireclient.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 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 PEERWIRECLIENT_H
+#define PEERWIRECLIENT_H
+
+#include <QBitArray>
+#include <QList>
+#include <QTcpSocket>
+
+QT_BEGIN_NAMESPACE
+class QHostAddress;
+class QTimerEvent;
+QT_END_NAMESPACE
+class TorrentPeer;
+
+struct TorrentBlock
+{
+    inline TorrentBlock(int p, int o, int l)
+        : pieceIndex(p), offset(o), length(l)
+    {
+    }
+    inline bool operator==(const TorrentBlock &other) const
+    {
+        return pieceIndex == other.pieceIndex
+                && offset == other.offset
+                && length == other.length;
+    }
+    
+    int pieceIndex;
+    int offset;
+    int length;
+};
+
+class PeerWireClient : public QTcpSocket
+{
+    Q_OBJECT
+
+public:
+    enum PeerWireStateFlag {
+        ChokingPeer = 0x1,
+        InterestedInPeer = 0x2,
+        ChokedByPeer = 0x4,
+        PeerIsInterested = 0x8
+    };
+    Q_DECLARE_FLAGS(PeerWireState, PeerWireStateFlag)
+
+    PeerWireClient(const QByteArray &peerId, QObject *parent = 0);
+    void initialize(const QByteArray &infoHash, int pieceCount);
+
+    void setPeer(TorrentPeer *peer);
+    TorrentPeer *peer() const;
+
+    // State
+    inline PeerWireState peerWireState() const { return pwState; }
+    QBitArray availablePieces() const;
+    QList<TorrentBlock> incomingBlocks() const;
+
+    // Protocol
+    void chokePeer();
+    void unchokePeer();
+    void sendInterested();
+    void sendKeepAlive();
+    void sendNotInterested();
+    void sendPieceNotification(int piece);
+    void sendPieceList(const QBitArray &bitField);
+    void requestBlock(int piece, int offset, int length);
+    void cancelRequest(int piece, int offset, int length);
+    void sendBlock(int piece, int offset, const QByteArray &data);
+
+    // Rate control
+    qint64 writeToSocket(qint64 bytes);
+    qint64 readFromSocket(qint64 bytes);
+    qint64 downloadSpeed() const;
+    qint64 uploadSpeed() const;
+
+    bool canTransferMore() const;
+    qint64 bytesAvailable() const { return incomingBuffer.size() + QTcpSocket::bytesAvailable(); }
+    qint64 socketBytesAvailable() const { return socket.bytesAvailable(); }
+    qint64 socketBytesToWrite() const { return socket.bytesToWrite(); }
+
+    void setReadBufferSize(int size);
+
+signals:
+    void infoHashReceived(const QByteArray &infoHash);
+    void readyToTransfer();
+
+    void choked();
+    void unchoked();
+    void interested();
+    void notInterested();
+
+    void piecesAvailable(const QBitArray &pieces);
+    void blockRequested(int pieceIndex, int begin, int length);
+    void blockReceived(int pieceIndex, int begin, const QByteArray &data);
+
+    void bytesReceived(qint64 size);
+
+protected slots:
+    void connectToHostImplementation(const QString &hostName,
+                                     quint16 port, OpenMode openMode = ReadWrite);
+    void diconnectFromHostImplementation();
+
+protected:
+    void timerEvent(QTimerEvent *event);
+
+    qint64 readData(char *data, qint64 maxlen);
+    qint64 readLineData(char *data, qint64 maxlen);
+    qint64 writeData(const char *data, qint64 len);
+
+private slots:
+    void sendHandShake();
+    void processIncomingData();
+    void socketStateChanged(QAbstractSocket::SocketState state);
+
+private:
+    // Data waiting to be read/written
+    QByteArray incomingBuffer;
+    QByteArray outgoingBuffer;
+
+    struct BlockInfo {
+        int pieceIndex;
+        int offset;
+        int length;
+        QByteArray block;
+    };
+    QList<BlockInfo> pendingBlocks;
+    int pendingBlockSizes;
+    QList<TorrentBlock> incoming;
+
+    enum PacketType {
+        ChokePacket = 0,
+        UnchokePacket = 1,
+        InterestedPacket = 2,
+        NotInterestedPacket = 3,
+        HavePacket = 4,
+        BitFieldPacket = 5,
+        RequestPacket = 6,
+        PiecePacket = 7,
+        CancelPacket = 8
+    };
+
+    // State
+    PeerWireState pwState;
+    bool receivedHandShake;
+    bool gotPeerId;
+    bool sentHandShake;
+    int nextPacketLength;
+
+    // Upload/download speed records
+    qint64 uploadSpeedData[8];
+    qint64 downloadSpeedData[8];
+    int transferSpeedTimer;
+
+    // Timeout handling
+    int timeoutTimer;
+    int pendingRequestTimer;
+    bool invalidateTimeout;
+    int keepAliveTimer;
+
+    // Checksum, peer ID and set of available pieces
+    QByteArray infoHash;
+    QByteArray peerIdString;
+    QBitArray peerPieces;
+    TorrentPeer *torrentPeer;
+
+    QTcpSocket socket;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(PeerWireClient::PeerWireState)
+
+#endif