Wireshark-dev: [Wireshark-dev] Heuristic Dissector Priority
From: Richard Maudsley <[email protected]>
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

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