Wireshark-dev: Re: [Wireshark-dev] Bit for starting / stopping / new Capture
From: Pascal Quantin <[email protected]>
Date: Wed, 17 Feb 2016 16:45:23 +0100

2016-02-17 16:38 GMT+01:00 FIXED-TERM Scholz Tobias (DC-IA/EAI) <[email protected]>:

Hi Pascal,


thanks for your answer. I don’t get exactly the meaning of this routine functionality, but I think it is not what I’m searching for.


For my dissector I need a special bit or value as a trigger, which says, that e.g. the capture has stopped or starts new.

E.g.:     capture isn’t running (stopped) à bit == FALSE

I do not understand your requirement. Maybe if you were explaining us what you would like to achieve exactly, we could see whether such functionality exists or not.


Does it exist?





Von: [email protected] [mailto:[email protected]] Im Auftrag von Pascal Quantin
Gesendet: Mittwoch, 17. Februar 2016 16:24
An: Developer support list for Wireshark <[email protected]>
Betreff: Re: [Wireshark-dev] Bit for starting / stopping / new Capture


Hi Tobias,


2016-02-17 16:16 GMT+01:00 FIXED-TERM Scholz Tobias (DC-IA/EAI) <[email protected]>:



I made some recherché, but couldn’t find any information to this topic. Is there a possibility to know (special bit for example), whether the user stopped, started the capture or opened Wireshark new?


That would be a great help for my dissector.


Not sure this is exactly your request, but you can register callbacks when a capture is started / loaded / reloaded (when a preference changes for example) and when it is closed with the following functions:

 * Allow protocols to register "init" routines, which are called before
 * we make a pass through a capture file and dissect all its packets
 * (e.g., when we read in a new capture file, or run a "filter packets"
 * or "colorize packets" pass over the current capture file or when the
 * preferences are changed).
WS_DLL_PUBLIC void register_init_routine(void (*func)(void));

 * Allows protocols to register "cleanup" routines which are called
 * after closing a capture file (or when preferences are changed, in
 * that case these routines are called before the init routines are
 * executed). It can be used to release resources that are allocated in
 * register_init_routine.
WS_DLL_PUBLIC void register_cleanup_routine(void (*func)(void));

Hope it helps,


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