how to make tcp server listen to a specific port using QTcpServer

[JohannesMunk]

Shoudn't it be:

QTcpServer *tcpserver;
tcpserver = new QTcpServer(this);
 
QHostAddress hostadd("192.168.3.89");
 
if (!tcpserver->listen(hostadd,23456)) {
  QMessageBox::critical(this, tr("Fortune Server"), tr("Unable to start the server: %1.").arg(tcpserver->errorString()));
  close();
   return;
}

QTcpServer *tcpserver;
tcpserver = new QTcpServer(this);

QHostAddress hostadd("192.168.3.89");

if (!tcpserver->listen(hostadd,23456)) {
  QMessageBox::critical(this, tr("Fortune Server"), tr("Unable to start the server: %1.").arg(tcpserver->errorString()));
  close();
   return;
}

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You were checking the return value of the wrong call to listen..

HIH

Johannes