{{Quickfixn}} Detecting wrong password in Initiator

[Pavel]

Hello!

Please advise, what is the proper handling of wrong credentials on logon in
initiator?

At the start of application Logon window is displayed to prompt for user
name + password, and in case of logon failure corresponding message should
be displayed, prompting for correct input again. How is this scenario
supported by QuickFix/n?

In case username/password is wrong, QuickFix/n Initiator will keep on logon
attempts, and I could not find any other handler of this situation but in
"IApplicationExt.FromEarlyIntercept". Apparently no other handler is called
in such a case, all logic is kept internally within the QuickFix/n engine -
it just continues logon failures with the wrong password every
<ReconnectInterval> seconds...

So, my questions are:
1. To handle invalid username/password - is it correct to catch "logout"
(MsgType=5) messages in "FromEarlyIntercept"?
(Also it implies having a flag that logon is in progress, to distinguish
"wrong credentials logout" from other scenarios...)

2. How to stop Initiator from logons with the wrong credentials - is
calling the session's "Logout" a proper solution?

3. The below code - does it look generally correct to handle invalid
credentials in the client (initiator) app with a Logon window (assuming
Connect() is called from the Logon window)?

Thank you!

Best regards,
Pavel

public void Connect(..)
{
    ...
    _connecting = true;
    _initiator.Start();
    ....
}

...

public void FromEarlyIntercept(Message msg, SessionID sessionID)
{
    if (_connecting)
    {
        string msgType = msg.Header.GetField(Tags.MsgType);
        switch (msgType)
        {
            case MsgType.LOGOUT: // Got logout when connecting - wrong
credentials?
                Session.LookupSession(sessionID).Logout("Invalid
credentials"); // Stop further logon attempts?
                <signal logon failure / wrong credentials to the Logon
Window>
                break;
            ...
        }
    }
   ...
}

public void OnLogon(SessionID sessionID)
{
    ...
    _connecting = false;
    ...
}
...
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.quickfixn.com/pipermail/quickfixn-quickfixn.com/attachments/20180522/f5dbc9ae/attachment.html>