Problems with H245NegLogicalChannel::HandleOpen freezing my device

[Clinton Stimpson <cjstimpson (at) afinternet.net>]

> Date: Mon, 30 Jan 2006 21:01:07 -0800 (PST)
> From: Guilhem Tardy <gravsten (at) yahoo.com>
> Subject: Re: [OpenH323]Problems with H245NegLogicalChannel::HandleOpen freezing my device
> To: openh323 (at) openh323.org
> Reply-To: openh323 (at) openh323.org
>
> Hi,
>
>  
>
> > I'm trying to connect some code I've written to a D-Link
> > DVC-1000.
> >    
>
> If my experience with the D-Link i2eye and your report are anything to go by,
> D-Link devices are nothing to brag home about.
>  
I can imagine.  One can even fry the circuit on these things by 
connection a live phone wire and having someone call you. :)  The phone 
jack is actually meant for a handset (no live phone line) to dial phone 
numbers.

>  
>
> > Anytime I make a connection, the D-Link device freezes, and a
> > cold reboot is the only way to restore it.
> > Debugging shows that the call
> > "connection.WriteControlPDU(reply)" in
> > H245NegLogicalChannel::HandleOpen for the incoming video
> > (dlink to my program) causes the device problems.
> >    
>
> So, DVC-1000 gets a cold when receiving an Open reply?
>  
Yep, gotta turn it off and back on.

> This is most surprising, and I would expect that it comes from some particular
> bit inside that PDU rather than the PDU as a whole.
>
> Did you try to call without video?
>  
These devices require video.  They'll timeout and disconnect if there is 
no video channel.

> Did you try to call with NetMeeting (or another H.323 endpoint not from
> OpenH323)?
>  
Yes, it connects fine.

> I suggest that you isolate the offending bits, rather than discarding the PDU
> completely.
>  
I started looking into that before my original posting, but I couldn't 
make sense of the bits.  I'm new to OpenH.323, and am trying to make a 
special purpose mcu.  I was impressed how far I can get with that 
library without writing too much code.

Thanks,
Clint

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