Wireshark · Wireshark-dev: [Wireshark-dev] How to call a sub-dissector many times without knowing the exact data size

[wsgd <wsgd@xxxxxxx>]

Hello,


I want to call a sub-dissector many times.
I know the total size of my data.
I do NOT know the size to give to the sub-dissector.
The sub-dissector will know (by itself) the size to dissect.

The corresponding scheme from the parent dissector point of view :

|-----------------------------------Packet data (total size is known)--------------------------------|
|--Parent dissector--|--sub-dissector 1 (size is unknown)--|...|--sub-dissector N (size is unknown)--|


The sub-dissector will be called by dissector_try_uint (or call_dissector or eventually dissector_try_heuristic).


Question 1)
Is it possible to call dissector_try_uint (or ...) with more data than needed by the sub-dissector ?
It seems not a problem.

Question 2)
How to know how many bytes have been dissected by the sub-dissector ?



Regards,
Olivier

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Wireshark Generic Dissectorhttp://wsgd.free.fr