108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef CONNECTION_H
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#define CONNECTION_H
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#include <QHostAddress>
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#include <QString>
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#include <QTcpSocket>
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#include <QTime>
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#include <QTimer>
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static const int MaxBufferSize = 1024000;
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class Connection : public QTcpSocket
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{
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Q_OBJECT
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public:
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enum ConnectionState {
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WaitingForGreeting,
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ReadingGreeting,
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ReadyForUse
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};
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enum DataType {
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PlainText,
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Ping,
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Pong,
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Greeting,
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Undefined
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};
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Connection(QObject *parent = 0);
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QString name() const;
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void setGreetingMessage(const QString &message);
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bool sendMessage(const QString &message);
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signals:
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void readyForUse();
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void newMessage(const QString &from, const QString &message);
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protected:
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void timerEvent(QTimerEvent *timerEvent);
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private slots:
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void processReadyRead();
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void sendPing();
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void sendGreetingMessage();
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private:
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int readDataIntoBuffer(int maxSize = MaxBufferSize);
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int dataLengthForCurrentDataType();
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bool readProtocolHeader();
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bool hasEnoughData();
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void processData();
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QString greetingMessage;
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QString username;
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QTimer pingTimer;
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QTime pongTime;
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QByteArray buffer;
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ConnectionState state;
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DataType currentDataType;
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int numBytesForCurrentDataType;
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int transferTimerId;
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bool isGreetingMessageSent;
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};
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#endif
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