qabstractsocket_p.h

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// Copyright (C) 2022 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QABSTRACTSOCKET_P_H

#define QABSTRACTSOCKET_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of the QAbstractSocket class.  This header file may change from

// version to version without notice, or even be removed.

//

// We mean it.

//

#include <QtNetwork/private/qtnetworkglobal_p.h>

#include "QtNetwork/qabstractsocket.h"

#include "QtCore/qbytearray.h"

#include "QtCore/qlist.h"

#include "QtCore/qtimer.h"

#include "private/qiodevice_p.h"

#include "private/qabstractsocketenginereceiver_p.h"

#include "qnetworkproxy.h"

QT_BEGIN_NAMESPACE

class QAbstractSocketEngine;

class QHostInfo;

class QNetworkInterface;

class Q_NETWORK_EXPORT QAbstractSocketPrivate : public QIODevicePrivate,

                                                public QAbstractSocketEngineReceiver

    Q_DECLARE_PUBLIC(QAbstractSocket)

public:

    QAbstractSocketPrivate(decltype(QObjectPrivateVersion) version = QObjectPrivateVersion);

    virtual ~QAbstractSocketPrivate();

    // from QAbstractSocketEngineReceiver

    inline void readNotification() override { canReadNotification(); }

    inline void writeNotification() override { canWriteNotification(); }

    inline void exceptionNotification() override {}

    inline void closeNotification() override { canCloseNotification(); }

    void connectionNotification() override;

#ifndef QT_NO_NETWORKPROXY

    inline void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *authenticator) override {

        Q_Q(QAbstractSocket);

        emit q->proxyAuthenticationRequired(proxy, authenticator);

#endif

    virtual bool bind(const QHostAddress &address, quint16 port, QAbstractSocket::BindMode mode,

                      const QNetworkInterface *iface = nullptr);

    virtual bool canReadNotification();

    bool canWriteNotification();

    void canCloseNotification();

    // slots

    void _q_connectToNextAddress();

    void _q_startConnecting(const QHostInfo &hostInfo);

    void _q_testConnection();

    void _q_abortConnectionAttempt();

    bool emittedReadyRead = false;

    bool emittedBytesWritten = false;

    bool abortCalled = false;

    bool pendingClose = false;

    QAbstractSocket::PauseModes pauseMode = QAbstractSocket::PauseNever;

    QString hostName;

    quint16 port = 0;

    QHostAddress host;

    QList<QHostAddress> addresses;

    quint16 localPort = 0;

    quint16 peerPort = 0;

    QHostAddress localAddress;

    QHostAddress peerAddress;

    QString peerName;

    QAbstractSocketEngine *socketEngine = nullptr;

    qintptr cachedSocketDescriptor = -1;

#ifndef QT_NO_NETWORKPROXY

    QNetworkProxy proxy;

    QNetworkProxy proxyInUse;

    QString protocolTag;

    void resolveProxy(const QString &hostName, quint16 port);

#else

    inline void resolveProxy(const QString &, quint16) { }

#endif

    inline void resolveProxy(quint16 port) { resolveProxy(QString(), port); }

    void resetSocketLayer();

    virtual bool flush();

    bool initSocketLayer(QAbstractSocket::NetworkLayerProtocol protocol);

    virtual void configureCreatedSocket();

    void startConnectingByName(const QString &host);

    void fetchConnectionParameters();

    bool readFromSocket();

    virtual bool writeToSocket();

    void emitReadyRead(int channel = 0);

    void emitBytesWritten(qint64 bytes, int channel = 0);

    void setError(QAbstractSocket::SocketError errorCode, const QString &errorString);

    void setErrorAndEmit(QAbstractSocket::SocketError errorCode, const QString &errorString);

    qint64 readBufferMaxSize = 0;

    bool isBuffered = false;

    bool hasPendingData = false;

    bool hasPendingDatagram = false;

    quint32 bytesWrittenEmissionCount = 0;

    QTimer *connectTimer = nullptr;

    int hostLookupId = -1;

    QAbstractSocket::SocketType socketType = QAbstractSocket::UnknownSocketType;

    QAbstractSocket::SocketState state = QAbstractSocket::UnconnectedState;

    // Must be kept in sync with QIODevicePrivate::errorString.

    QAbstractSocket::SocketError socketError = QAbstractSocket::UnknownSocketError;

    QAbstractSocket::NetworkLayerProtocol preferredNetworkLayerProtocol =

            QAbstractSocket::UnknownNetworkLayerProtocol;

    bool prePauseReadSocketNotifierState = false;

    bool prePauseWriteSocketNotifierState = false;

    bool prePauseExceptionSocketNotifierState = false;

    static void pauseSocketNotifiers(QAbstractSocket*);

    static void resumeSocketNotifiers(QAbstractSocket*);

    static QAbstractSocketEngine* getSocketEngine(QAbstractSocket*);

};

QT_END_NAMESPACE

#endif // QABSTRACTSOCKET_P_H