text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtNetwork module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** 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 https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
  ** Public license version 3 or any later version approved by the KDE Free
  ** Qt Foundation. The licenses are as published by the Free Software
  ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
  ** https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef QNETWORKSESSION_H
  #define QNETWORKSESSION_H
  
  #include <QtNetwork/qtnetworkglobal.h>
  #include <QtCore/qobject.h>
  #include <QtCore/qstring.h>
  #include <QtNetwork/qnetworkinterface.h>
  #include <QtCore/qvariant.h>
  #include <QtNetwork/qnetworkconfiguration.h>
  
  #ifndef QT_NO_BEARERMANAGEMENT
  
  #if defined(Q_OS_WIN) && defined(interface)
  #undef interface
  #endif
  
  #include <QtCore/qshareddata.h>
  QT_BEGIN_NAMESPACE
  
  class QNetworkSessionPrivate;
  class Q_NETWORK_EXPORT QNetworkSession : public QObject
  {
      Q_OBJECT
  
  public:
      enum State {
          Invalid = 0,
          NotAvailable,
          Connecting,
          Connected,
          Closing,
          Disconnected,
          Roaming
      };
  
      enum SessionError {
          UnknownSessionError = 0,
          SessionAbortedError,
          RoamingError,
          OperationNotSupportedError,
          InvalidConfigurationError
      };
  
      enum UsagePolicy {
          NoPolicy = 0,
          NoBackgroundTrafficPolicy = 1
      };
  
      Q_DECLARE_FLAGS(UsagePolicies, UsagePolicy)
  
      explicit QNetworkSession(const QNetworkConfiguration &connConfig, QObject *parent = nullptr);
      virtual ~QNetworkSession();
  
      bool isOpen() const;
      QNetworkConfiguration configuration() const;
  #ifndef QT_NO_NETWORKINTERFACE
      QNetworkInterface interface() const;
  #endif
  
      State state() const;
      SessionError error() const;
      QString errorString() const;
      QVariant sessionProperty(const QString &key) const;
      void setSessionProperty(const QString &key, const QVariant &value);
  
      quint64 bytesWritten() const;
      quint64 bytesReceived() const;
      quint64 activeTime() const;
  
      QNetworkSession::UsagePolicies usagePolicies() const;
  
      bool waitForOpened(int msecs = 30000);
  
  public Q_SLOTS:
      void open();
      void close();
      void stop();
  
      //roaming related slots
      void migrate();
      void ignore();
      void accept();
      void reject();
  
  Q_SIGNALS:
      void stateChanged(QNetworkSession::State);
      void opened();
      void closed();
      void error(QNetworkSession::SessionError);
      void preferredConfigurationChanged(const QNetworkConfiguration &config, bool isSeamless);
      void newConfigurationActivated();
      void usagePoliciesChanged(QNetworkSession::UsagePolicies usagePolicies);
  
  protected:
      virtual void connectNotify(const QMetaMethod &signal) override;
      virtual void disconnectNotify(const QMetaMethod &signal) override;
  
  private:
      Q_DISABLE_COPY(QNetworkSession)
      friend class QNetworkSessionPrivate;
      QNetworkSessionPrivate *d;
  };
  
  QT_END_NAMESPACE
  Q_DECLARE_METATYPE(QNetworkSession::State)
  Q_DECLARE_METATYPE(QNetworkSession::SessionError)
  Q_DECLARE_METATYPE(QNetworkSession::UsagePolicies)
  
  #endif // QT_NO_BEARERMANAGEMENT
  
  #endif // QNETWORKSESSION_H
  