Ethereal-dev: Re: [Ethereal-dev] LAT Protocol specs

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From: Gerald Combs <gerald@xxxxxxxx>
Date: Thu, 12 Oct 2000 10:46:13 -0500 (CDT)
On Thu, 12 Oct 2000, Guy Harris wrote:

> On Wed, Oct 11, 2000 at 11:49:21PM +0900, Richard Sharpe wrote:
> > I am there fore motivated to start a LAT dissector for Ethereal. Can anyone
> > point me to the protocol specs?
> 
> They're probably locked up in some building in Massachusetts or New
> Hampshire in the northeastern US.
> 
> I.e., LAT is a DEC-proprietary protocol; DEC have never published a
> spec.

I wonder if you can get the spec on microfiche, like you could with much
of the other DEC documentation.

Searching for "lat protocol" on Compaq's site turns up
http://www.openvms.digital.com/wizard/wiz_1762.html, which says

" The Local Area Terminal (LAT) protocol specifications and internals are
  licensed.  If you wish to order a LAT license, please contact Compaq
  sales directly."


> However, at
> 
> 	http://linux-decnet.sourceforge.net/
> 
> is the Linux DECNET project page; if you go to
> 
> 	http://sourceforge.net/projects/linux-decnet/
> 
> there's a link for latd 1.0, a LAT daemon.
> 
> I downloaded an older version of latd and started working on a LAT
> dissector; I've attached what I have so far.  It compiles (or it did
> last time I tried it, which wasn't too long ago, I think), and it
> dissects some LAT stuff, but not all of it.  It probably should be
> changed to use the new string stuff Gilbert stuck in - as I remember,
> there are some counted strings in the protocol.
>