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Heuristic Dissector Priority
From: Richard Maudsley <richard.maudsley () powwownow com>
Date: Mon, 22 Apr 2013 16:11:03 +0000

My plugin registers a UDP heuristic dissector which handles several protocols multiplexed on the same port. This is 
working fine, except that one of the built-in Wireshark dissectors is picking up packets before I get a chance to see 
them and blocks my dissector from running, even though I would be able to return TRUE from the dissector procedure and 
handle the packet.

At first I started looking for some sort of priority setting (a simple integer precedence on the dissector would have 
made sense), but it doesn't look like such a thing exists. Then I started looking into more complicated solutions, such 
as disabling the offending dissector, allowing my dissector to run, and invoking it afterwards as a sub-dissector.

Any hints on how to do this properly would be greatly appreciated.

Regards, Richard

Richard Maudsley | Junior Systems Developer
Office: +44 (0)207 990 0900 | Fax: +44 (0)203 355 4262
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Website: www.powwownow.co.uk<http://www.powwownow.co.uk/>

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