Hello,

I am trying to establish a telnet connection in a console application. I have the following code:

Qt Code: 
  1. QTcpSocket *QTcpSocketMine = new QTcpSocket();
  2. 	QTcpSocketMine->connectToHost("192.168.1.1", 23);
  3. 	if (QTcpSocketMine->isOpen())
  4. 	{
  5. 		qDebug() << "QTcpSocketMine->isOpen() == true";
  6. 	} else
  7. 	{
  8. 		qDebug() << "QTcpSocketMine->isOpen() == false";
  9. 	}
  10.  
  11. 	if (QTcpSocketMine->isValid())
  12. 	{
  13. 		qDebug() << "QTcpSocketMine->isValid() == true";
  14. 	} else
  15. 	{
  16. 		qDebug() << "QTcpSocketMine->isValid() == false";
  17. 	}
  18.  
  19. 	if (QTcpSocketMine->waitForConnected(3000))
  20. 	{
  21. 		qDebug() << "connection established.";
  22. 	} else
  23. 	{
  24. 		QString QStringErrorString = QTcpSocketMine->errorString();
  25. 		qDebug() << QStringErrorString;
  26. 	}
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If I set the parameter of QTcpSocketMine->waitForConnected to -1 the program does not exit any more. If i read the error message with

QString QStringErrorString = QTcpSocketMine->errorString();
qDebug() << QStringErrorString;

it prints Socket operation timed out. If I open putty and connect to 192.168.1.1:23 it immediately works. Same with the Windows telnet client. What could that be?

Another problem is, that the signals and slots do not work.
I define

connect(QTcpSocketMine, SIGNAL(connected()), this, SLOT(connectionComplete()));
connect(QTcpSocketMine, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(errorOccured(QAbstractSocket::SocketError)));
connect(QTcpSocketMine, SIGNAL(hostFound()), this, SLOT(hostFoundComplete()));
connect(QTcpSocketMine, SIGNAL(stateChanged(QAbstractSocket::SocketState)) , this, SLOT(handleStateChanged(QAbstractSocket::SocketSta te)));

in the cpp and my whole h looks like that:

Qt Code: 
  1. #ifndef QMYPROCESS_H
  2. #include <QProcess>
  3. #include <QDebug>
  4. #include <QTcpSocket>
  5.  
  6. class QMyProcess: public QProcess
  7. {
  8. 	Q_OBJECT;
  9.  
  10. 	public:
  11. 		QMyProcess();
  12.  
  13. 	public slots:
  14. 		void connectionComplete();
  15. 		void errorOccured(QAbstractSocket::SocketError socketError);
  16. 		void hostFoundComplete();
  17. 		void handleStateChanged(QAbstractSocket::SocketState socketState);
  18. };
  19.  
  20. #endif // QMYPROCESS_H
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Do I miss something?