Ethereal-dev: Re: [Ethereal-dev] Developing Application-layer protocol dissector for X.25

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Thu, 10 Jun 2004 00:25:04 -0700
On Wed, Jun 09, 2004 at 07:47:06PM +0530, Durgaprasad SV wrote:
> I have a requirement to develop a dissector/plug-in for an application-layer
> protocol (proprietory).
> The transport layer/network layer can be either TCP/IP or X.25.
> 
> I could figure out how to develop the dissector in case of transport over
> TCP/IP.
> Can some one help me to do this in case of X.25 as transport layer.

What indicates, in an X.25 call, that your protocol is being used? 
I.e., is it specified with an X.25 secondary protocol identifier, or
something else?