QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
        // use the first non-localhost IPv4 address
        for (int i = 0; i < ipAddressesList.size(); ++i) {
            if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
                ipAddressesList.at(i).toIPv4Address()) {
                ipAddress = ipAddressesList.at(i).toString();
                break;
            }
        }
        // if we did not find one, use IPv4 localhost
    if (ipAddress.isEmpty())
        {
            ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
        }
        ui->label_7->setText("The server is running on");
        ui->label_9->setText(tr("%2")
                            .arg(tcpServer->serverPort())); 
        ui->label_2->setText(ipAddress);