text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtNfc module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** 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 http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://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 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef QLLCPSOCKET_H
  #define QLLCPSOCKET_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <QtCore/QIODevice>
  #include <QtNetwork/QAbstractSocket>
  #include <QtNfc/qnfcglobal.h>
  
  QT_BEGIN_NAMESPACE
  
  class QNearFieldTarget;
  class QLlcpSocketPrivate;
  
  class Q_NFC_EXPORT QLlcpSocket : public QIODevice
  {
      Q_OBJECT
  
      Q_DECLARE_PRIVATE(QLlcpSocket)
  
      friend class QLlcpServerPrivate;
  
  public:
      enum SocketState {
          UnconnectedState = QAbstractSocket::UnconnectedState,
          ConnectingState = QAbstractSocket::ConnectingState,
          ConnectedState = QAbstractSocket::ConnectedState,
          ClosingState = QAbstractSocket::ClosingState,
          BoundState = QAbstractSocket::BoundState,
          ListeningState = QAbstractSocket::ListeningState
      };
      Q_ENUM(SocketState)
  
      enum SocketError {
          UnknownSocketError = QAbstractSocket::UnknownSocketError,
          RemoteHostClosedError = QAbstractSocket::RemoteHostClosedError,
          SocketAccessError = QAbstractSocket::SocketAccessError,
          SocketResourceError = QAbstractSocket::SocketResourceError
      };
      Q_ENUM(SocketError)
  
      explicit QLlcpSocket(QObject *parent = 0);
      ~QLlcpSocket();
  
      void connectToService(QNearFieldTarget *target, const QString &serviceUri);
      void disconnectFromService();
  
      void close();
  
      bool bind(quint8 port);
  
      bool hasPendingDatagrams() const;
      qint64 pendingDatagramSize() const;
  
      qint64 writeDatagram(const char *data, qint64 size);
      qint64 writeDatagram(const QByteArray &datagram);
  
      qint64 readDatagram(char *data, qint64 maxSize,
                          QNearFieldTarget **target = 0, quint8 *port = 0);
      qint64 writeDatagram(const char *data, qint64 size,
                           QNearFieldTarget *target, quint8 port);
      qint64 writeDatagram(const QByteArray &datagram, QNearFieldTarget *target, quint8 port);
  
      SocketError error() const;
      SocketState state() const;
  
      qint64 bytesAvailable() const;
      bool canReadLine() const;
  
      bool waitForReadyRead(int msecs = 30000);
      bool waitForBytesWritten(int msecs = 30000);
      virtual bool waitForConnected(int msecs = 30000);
      virtual bool waitForDisconnected(int msecs = 30000);
      bool isSequential() const;
  
  signals:
      void connected();
      void disconnected();
      void error(QLlcpSocket::SocketError socketError);
      void stateChanged(QLlcpSocket::SocketState socketState);
  
  protected:
      qint64 readData(char *data, qint64 maxlen);
      qint64 writeData(const char *data, qint64 len);
  
  private:
      QLlcpSocket(QLlcpSocketPrivate *d, QObject *parent);
  
      QLlcpSocketPrivate *d_ptr;
  };
  
  QT_END_NAMESPACE
  
  #endif // QLLCPSOCKET_H
  