peerwireclient.h Example File

/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see For further ** information use the contact form at ** ** BSD License Usage ** Alternatively, 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 The Qt Company Ltd 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> class QHostAddress; class QTimerEvent; 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) explicit 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 override { return incomingBuffer.size() + QTcpSocket::bytesAvailable(); } qint64 socketBytesAvailable() const { return socket.bytesAvailable(); } qint64 socketBytesToWrite() const { return socket.bytesToWrite(); } void setReadBufferSize(qint64 size) override; void connectToHost(const QHostAddress &address, quint16 port, OpenMode openMode = ReadWrite) override; void diconnectFromHost(); 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: void timerEvent(QTimerEvent *event) override; qint64 readData(char *data, qint64 maxlen) override; qint64 readLineData(char *data, qint64 maxlen) override; qint64 writeData(const char *data, qint64 len) override; 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

© 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.