QTcpSocket connecting even to no server!

[Darta]

hello everyone,

I have an issue with my usage of a QTcpSocket that will connect to no server no matter the adress as long as it is a valide one and regardless of the port :

function used to call the two functions that will actualy connect :

QSettings vmIni("qrc:/VirtualHome.ini");

    vmIni.setValue("ServerIP", "127.0.0.1");
    vmIni.setValue("ServerPort", 58513);
    QString ip = vmIni.value("ServerIP").toString();
    quint16 port = vmIni.value("ServerPort").toUInt();
    qDebug() << "Adress:" << ip << "Port:" << port;
    if (m_client.bindTo(ip, port)) {
        if (!m_client.connectTo(ip, port))
            qDebug() << "Fail to connect to server.";
    }
    else
        qDebug() << "Fail to bind to server";
    qDebug() << "Client connected:" << m_client.isConnected();

and my two functions that actually connects to a supposed server:

bool Client::bindTo(QString adress, quint16 port)
{
    QHostAddress adressToCo;
    if (adressToCo.setAddress(adress) == true)
    {
        m_socket = new QTcpSocket;
        if (!m_socket->bind(adressToCo, port)) {
            m_errorMsg = "Bind error to adress: " + adress;
            qDebug() << "Bind error to adress: " + adress;
        }
    }
    else {
        m_errorMsg = "Wrong IP address.";
        qDebug() << "Wrong IP address: " + adress;
        return false;
    }
    qDebug() << "Bind corectly to " + adress;
    return true;
}

bool Client::connectTo(QString adress, quint16 port)
{
    QHostAddress adressToCo;
    adressToCo.setAddress(adress);
    QObject::connect(m_socket, &QTcpSocket::readyRead, [=] {
        QString msg = m_socket->readAll();
        emit msgRcvd(msg);
    });
    m_socket->connectToHost(adressToCo, port);
    if (!m_socket->waitForConnected(5000)) {
        m_errorMsg = m_socket->errorString();
        qDebug() << "Error socket:" << m_socket->errorString();
        return false;
    }
    else if(m_socket->state() != QAbstractSocket::ConnectedState) {
        m_errorMsg = m_socket->errorString();
        qDebug() << "Error socket:" << m_socket->errorString();
        return false;
    }
    qDebug() << "Connect corectly to " + adress;
    m_socket->write("writing a useless sentence.");
    return true;
}

so when I put a correct address with any ports I get the output:

Adress: "127.0.0.1" Port: 58513
"Bind corectly to 127.0.0.1"
"Connect corectly to 127.0.0.1"
Client connected: true

at the end we can see that :

bool    Client::isConnected(void)
{
    return m_socket->state() == QAbstractSocket::ConnectedState ? true : false;
}

it return true every single times

[Christian Ehrlicher]

@Darta said in QTcpSocket connecting even to no server!:

it return true every single times

And I don't see why not - first you open a port with bind() and then you connect to this opened port with connectTo() which is completely useless and strange but that's not a reason that it will not work.

/edit: You will and must not call bind() on a client socket.

[Darta]

@Christian-Ehrlicher thank's very much ^^ It works fine now