Wireshark · Ethereal-dev: Re: [Ethereal-dev] Cleanup function for each frame

[Ulf Lamping <ulf.lamping@xxxxxx>]

Stig Bjørlykke wrote:

> Is it possible to register a cleanup function to be run before/after  
> each frame is dissected?

Not as far as I know.

> I need something like this in COTP in the situation where the first  
> COTP segment in a frame is the last of a fragmented block (the rest  
> received in previous frames), and the second COTP segment is a non- 
> fragmented block.  The COTP length is 2, which means dst_ref is  
> always 0 (used as "id" in the fragment functions), and the last COTP  
> segment is messing up with the fragment reassembly (because the frame  
> is dissected twice).  

Is the frame dissected twice, or is the dissector called twice because 
of the two appearances in this frame?

> If I can reset a counter after dissecting this  frame this counter can 
> be used as "id".

Wouldn't this mess up the reassembling of the following frames?

BTW: do you have an example capture?

Regards, ULFL