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#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)
PeerWireClient(const QByteArray &peerId, QObject *parent = 0);
void initialize(const QByteArray &infoHash, int pieceCount);
void setPeer(TorrentPeer *peer);
TorrentPeer *peer() const;
<span class="comment">// State</span>
inline PeerWireState peerWireState() const { return pwState; }
QBitArray availablePieces() const;
QList<TorrentBlock> incomingBlocks() const;
<span class="comment">// Protocol</span>
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);
<span class="comment">// Rate control</span>
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:
<span class="comment">// Data waiting to be read/written</span>
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
};
<span class="comment">// State</span>
PeerWireState pwState;
bool receivedHandShake;
bool gotPeerId;
bool sentHandShake;
int nextPacketLength;
<span class="comment">// Upload/download speed records</span>
qint64 uploadSpeedData[8];
qint64 downloadSpeedData[8];
int transferSpeedTimer;
<span class="comment">// Timeout handling</span>
int timeoutTimer;
int pendingRequestTimer;
bool invalidateTimeout;
int keepAliveTimer;
<span class="comment">// Checksum, peer ID and set of available pieces</span>
QByteArray infoHash;
QByteArray peerIdString;
QBitArray peerPieces;
TorrentPeer *torrentPeer;
QTcpSocket socket;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(PeerWireClient::PeerWireState)
#endif</pre>
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