Ethereal-dev: Re: [ethereal-dev] Multiple Dissectors

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Index Thread Index Other Months All Mailing Lists
Date Prev Date Next Thread Prev Thread Next
From: Gilbert Ramirez <gram@xxxxxxxxxx>
Date: Wed, 5 Jul 2000 09:51:10 -0500
On Wed, Jul 05, 2000 at 03:56:02AM -0500, Neil Hunter wrote:
> 
> 
> Hi,
> I've just started looking through the Ethereal code and documents, so 
> apologies
> if this is covered elsewhere (but I haven't spotted it yet!).
> 
> Is it possible to chain dissectors together?
> 
> I'll explain the scenario in case I'm coming at this in the wrong way. WAP 
> uses
> up to three separate protocols to carry its data and uses UDP as the
> transport. Therefore a UDP packet could contain WTLS, WTP or WSP data. The
> combination is (thankfully) defined by the port being used.
> 
> So, for port 9200, the UDP packet contains only WSP data. However, for port
> 9201 the UDP packet contains WTP data *followed* by WSP data.
> 
> I'd rather keep the protocol dissection separate if possible and not have a
> single wap dissector that splits everything up internally - but is this
> feasible?

Sure. Look at the ppp dissector for an example. It has both
dissect_ppp() and dissect_payload_ppp().

--gilbert