Wireshark mailing list archives

Re: Does proto_deregister_field really work?


From: Peter Wu <peter () lekensteyn nl>
Date: Sun, 27 May 2018 12:19:49 +0200

Hi Richard,

On Wed, May 09, 2018 at 04:51:13PM -0700, Richard Sharpe wrote:
Hi folks,

I have an application where I want to change the specification of an
HF entry or two, and found proto_deregister_field.

It would seem that I can deregister a field and then register a new
version of it ... as long as I am careful.

What is the cost of doing this?

Is an alternative to register a fixed array but modify the entries?

What was the use case for this dynamic field update? What property were
you interested in?

I am not sure how well dynamic field (de)registration is supposed to
work. It is causing some memory leaks and I am worried that trying to
solve those can result in other memory safety issues (use-after-free).
-- 
Kind regards,
Peter Wu
https://lekensteyn.nl
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