/****************************************************************************

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtNetwork module of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** rights.  These rights are described in the Nokia Qt LGPL Exception

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef QABSTRACTSOCKET_H

#define QABSTRACTSOCKET_H

#include <QtCore/qiodevice.h>

#include <QtCore/qobject.h>

#ifndef QT_NO_DEBUG_STREAM

#include <QtCore/qdebug.h>

#endif

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Network)

class QHostAddress;

#ifndef QT_NO_NETWORKPROXY

class QNetworkProxy;

#endif

class QAbstractSocketPrivate;

class QAuthenticator;

class Q_NETWORK_EXPORT QAbstractSocket : public QIODevice

{

    Q_OBJECT

public:

    enum SocketType {

        TcpSocket,

        UdpSocket,

        UnknownSocketType = -1

    };

    enum NetworkLayerProtocol {

        IPv4Protocol,

        IPv6Protocol,

        UnknownNetworkLayerProtocol = -1

    };

    enum SocketError {

        ConnectionRefusedError,

        RemoteHostClosedError,

        HostNotFoundError,

        SocketAccessError,

        SocketResourceError,

        SocketTimeoutError,                     /* 5 */

        DatagramTooLargeError,

        NetworkError,

        AddressInUseError,

        SocketAddressNotAvailableError,

        UnsupportedSocketOperationError,        /* 10 */

        UnfinishedSocketOperationError,

        ProxyAuthenticationRequiredError,

        SslHandshakeFailedError,

        ProxyConnectionRefusedError,

        ProxyConnectionClosedError,             /* 15 */

        ProxyConnectionTimeoutError,

        ProxyNotFoundError,

        ProxyProtocolError,

        UnknownSocketError = -1

    };

    enum SocketState {

        UnconnectedState,

        HostLookupState,

        ConnectingState,

        ConnectedState,

        BoundState,

        ListeningState,

        ClosingState

#ifdef QT3_SUPPORT

        ,

        Idle = UnconnectedState,

        HostLookup = HostLookupState,

        Connecting = ConnectingState,

        Connected = ConnectedState,

        Closing = ClosingState,

        Connection = ConnectedState

#endif

    };

    enum SocketOption {

        LowDelayOption, // TCP_NODELAY

        KeepAliveOption // SO_KEEPALIVE

    };

    QAbstractSocket(SocketType socketType, QObject *parent);

    virtual ~QAbstractSocket();

    // ### Qt 5: Make connectToHost() and disconnectFromHost() virtual.

    void connectToHost(const QString &hostName, quint16 port, OpenMode mode = ReadWrite);

    void connectToHost(const QHostAddress &address, quint16 port, OpenMode mode = ReadWrite);

    void disconnectFromHost();

    bool isValid() const;

    qint64 bytesAvailable() const;

    qint64 bytesToWrite() const;

    bool canReadLine() const;

    quint16 localPort() const;

    QHostAddress localAddress() const;

    quint16 peerPort() const;

    QHostAddress peerAddress() const;

    QString peerName() const;

    // ### Qt 5: Make setReadBufferSize() virtual

    qint64 readBufferSize() const;

    void setReadBufferSize(qint64 size);

    void abort();

    // ### Qt 5: Make socketDescriptor() and setSocketDescriptor() virtual.

    int socketDescriptor() const;

    bool setSocketDescriptor(int socketDescriptor, SocketState state = ConnectedState,

                             OpenMode openMode = ReadWrite);

    // ### Qt 5: Make virtual?

    void setSocketOption(QAbstractSocket::SocketOption option, const QVariant &value);

    QVariant socketOption(QAbstractSocket::SocketOption option);

    SocketType socketType() const;

    SocketState state() const;

    SocketError error() const;

    // from QIODevice

    void close();

    bool isSequential() const;

    bool atEnd() const;

    bool flush();

    // for synchronous access

    // ### Qt 5: Make waitForConnected() and waitForDisconnected() virtual.

    bool waitForConnected(int msecs = 30000);

    bool waitForReadyRead(int msecs = 30000);

    bool waitForBytesWritten(int msecs = 30000);

    bool waitForDisconnected(int msecs = 30000);

#ifndef QT_NO_NETWORKPROXY

    void setProxy(const QNetworkProxy &networkProxy);

    QNetworkProxy proxy() const;

#endif

Q_SIGNALS:

    void hostFound();

    void connected();

    void disconnected();

    void stateChanged(QAbstractSocket::SocketState);

    void error(QAbstractSocket::SocketError);

#ifndef QT_NO_NETWORKPROXY

    void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *authenticator);

#endif

protected Q_SLOTS:

    void connectToHostImplementation(const QString &hostName, quint16 port, OpenMode mode = ReadWrite);

    void disconnectFromHostImplementation();

protected:

    qint64 readData(char *data, qint64 maxlen);

    qint64 readLineData(char *data, qint64 maxlen);

    qint64 writeData(const char *data, qint64 len);

    void setSocketState(SocketState state);

    void setSocketError(SocketError socketError);

    void setLocalPort(quint16 port);

    void setLocalAddress(const QHostAddress &address);

    void setPeerPort(quint16 port);

    void setPeerAddress(const QHostAddress &address);

    void setPeerName(const QString &name);

    QAbstractSocket(SocketType socketType, QAbstractSocketPrivate &dd, QObject *parent = 0);

private:

    Q_DECLARE_PRIVATE(QAbstractSocket)

    Q_DISABLE_COPY(QAbstractSocket)

    Q_PRIVATE_SLOT(d_func(), void _q_connectToNextAddress())

    Q_PRIVATE_SLOT(d_func(), void _q_startConnecting(const QHostInfo &))

    Q_PRIVATE_SLOT(d_func(), void _q_abortConnectionAttempt())

    Q_PRIVATE_SLOT(d_func(), void _q_testConnection())

    Q_PRIVATE_SLOT(d_func(), void _q_forceDisconnect())

#ifdef QT3_SUPPORT

public:

    enum Error {

        ErrConnectionRefused = ConnectionRefusedError,

        ErrHostNotFound = HostNotFoundError,

        ErrSocketRead = UnknownSocketError

    };

    inline QT3_SUPPORT int socket() const { return socketDescriptor(); }

    inline QT3_SUPPORT void setSocket(int socket) { setSocketDescriptor(socket); }

    inline QT3_SUPPORT qulonglong waitForMore(int msecs, bool *timeout = 0) const

    {

        QAbstractSocket *that = const_cast<QAbstractSocket *>(this);

        if (that->waitForReadyRead(msecs))

            return qulonglong(bytesAvailable());

        if (error() == SocketTimeoutError && timeout)

            *timeout = true;

        return 0;

    }

    typedef SocketState State;

Q_SIGNALS:

    QT_MOC_COMPAT void connectionClosed(); // same as disconnected()

    QT_MOC_COMPAT void delayedCloseFinished(); // same as disconnected()

#endif

};

#ifndef QT_NO_DEBUG_STREAM

Q_NETWORK_EXPORT QDebug operator<<(QDebug, QAbstractSocket::SocketError);

Q_NETWORK_EXPORT QDebug operator<<(QDebug, QAbstractSocket::SocketState);

#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif // QABSTRACTSOCKET_H