telnet client not connecting -- to QTCPserver

Question

Why i am not able to connect to a server running on my localhost using telnet client ?
I am using windows-7 & telnet client is turned on in control panel.

Please suggest how to make it working ?

#define SERVER_PORT 5000

Tcp server is created in the tcpserver object :---

tcpserverobject::tcpserverobject(QObject *parent) :
    QObject(parent), tcpServer(0)
{
    tcpServer = new QTcpServer;

    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(on_newConnection()));

}

// Common slot for the tcpserver - thread

void tcpserverobject::dowork()
{
    if (!tcpServer->listen(QHostAddress::LocalHost, SERVER_PORT )) {

        qDebug() << "\n returning from server listning error .. !!! ";

        return;
    }

    qDebug() << "\n server listning";


    //while(1)
    while(!m_bQuit)
    {
    }

}

Server new connection code :---

void tcpserverobject::on_newConnection()
{
    QByteArray block;

    block.append(" \n Hello from server .. !!!") ;

    QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
    connect(clientConnection, SIGNAL(disconnected()),
                clientConnection, SLOT(deleteLater()));

    // Create new thread for this .. client request ..!!
    qDebug() << "\n New connection request ..!!!";
    qDebug() << "\n New client from:" << clientConnection->peerAddress().toString();

    clientConnection->write(block);
    clientConnection->flush();

    clientConnection->disconnectFromHost();
    qDebug() << "\n New connection request closed ..!!!";
}

Now i enter command in telnet :----

C:\Users\Admin> telnet

Welcome to Microsoft Telnet Client

Escape Character is 'CTRL+]'

Microsoft Telnet> open localhost 5000
Connecting To localhost...

I am able to make my server go in listen mode, as following statement is printed :--

qDebug() << "\n server listning";

But why telnet client is not able to connect to the server running on localhost & PORT = 5000 ?

Answer 1

In the function do work, you have this code: -

//while(1)
while(!m_bQuit)
{
}

This is going to stop the current thread from processing messages. If you want to be able to stop the server, have a slot, in the tcpserverobject class, which will close the connection to the QTcpServer when it receives a signal.