Ethereal-dev: Re: [Ethereal-dev] Fields and protocols relationships

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From: Stefano Pettini <spettini@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 03 Jan 2005 00:00:00 +0100
Guy Harris wrote:
Currently, that can't be done without modifying the "Decode As..." code - the only fields that the "Decode As" window supports are: 
    the Ethernet type;
    the IP protocol;
    TCP ports;
    UDP ports;
    SCTP PPIs.
Ok. This means that I can't let the user choose the dissectors for a stack of 2 protocol over UDP.
So dissector A would know whether it'd be calling dissector B or C, and should dissect the options based on that.
The problem is it's difficult, for dissector A, to understand what's the upper layer protocol. 

Thanks.

Stefano