Checking for closed/broken connections

Hi,

I've big problem with unstable network links and libetpan. Eg., how can I 
check if a connection is closed/broken when ein try to make a command?

Well, I hold the connection as long as possible and don't make a login on 
every command 'cause this would be a little bit senseless.

So I tried:

    if (m_imap) {
        err = mailimap_noop(m_imap);
        if (err!=MAILIMAP_NO_ERROR) {
	    err = mailimap_close( m_imap );
	    mailimap_free( m_imap );
	    m_imap = 0;
        } else {
            mailstream_flush(m_imap->imap_stream);
            return;
        }
    }

I thought it would be the best in the first step, but sometimes I get a 
runtime at this point. 

So, what is the best way to check the connection for sending a new command? 
may be, that I didn't see it in the documentation... 

Bye




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