handover.cpp Example File

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 #include "handover.h"

 #include <qnearfieldmanager.h>
 #include <qllcpserver.h>
 #include <qllcpsocket.h>
 #include <qbluetoothlocaldevice.h>

 #include <QtCore/QStringList>

 static const QLatin1String tennisUri("urn:nfc:sn:com.nokia.qtnfc.tennis");

 Handover::Handover(quint16 serverPort, QObject *parent)
 :   QObject(parent), m_server(new QLlcpServer(this)),
     m_client(new QLlcpSocket(this)), m_remote(0), m_serverPort(0), m_localServerPort(serverPort)
 {
     connect(m_server, SIGNAL(newConnection()), this, SLOT(handleNewConnection()));
     m_server->listen(tennisUri);

     connect(m_client, SIGNAL(disconnected()), this, SLOT(clientDisconnected()));
     connect(m_client, SIGNAL(readyRead()), this, SLOT(readBluetoothService()));

     m_client->connectToService(0, tennisUri);
 }

 Handover::~Handover()
 {
 }

 QBluetoothAddress Handover::bluetoothAddress() const
 {
     return m_address;
 }

 quint16 Handover::serverPort() const
 {
     return m_serverPort;
 }

 void Handover::handleNewConnection()
 {
     if (m_remote)
         m_remote->deleteLater();

     m_remote = m_server->nextPendingConnection();

     connect(m_remote, SIGNAL(disconnected()), this, SLOT(remoteDisconnected()));

     sendBluetoothService();
 }

 void Handover::remoteDisconnected()
 {
     m_remote->deleteLater();
     m_remote = 0;
 }

 void Handover::clientDisconnected()
 {
     m_client->connectToService(0, tennisUri);
 }

 void Handover::readBluetoothService()
 {
     QByteArray rawData = m_client->readAll();
     QString data = QString::fromUtf8(rawData.constData(), rawData.size());
     QStringList split = data.split(QLatin1Char(' '));

     QBluetoothAddress address = QBluetoothAddress(split.at(0));
     quint16 port = split.at(1).toUInt();

     QBluetoothLocalDevice localDevice;
     QBluetoothAddress localAddress = localDevice.address();

     if (localAddress < address) {
         m_address = address;
         m_serverPort = port;
         emit bluetoothServiceChanged();
     }
 }

 void Handover::sendBluetoothService()
 {
     QBluetoothLocalDevice localDevice;
     const QString data = localDevice.address().toString() + QLatin1Char(' ') +
                          QString::number(m_localServerPort);

     m_remote->write(data.toUtf8());
 }