Wireshark · Wireshark-dev: Re: [Wireshark-dev] Number of packets

[Jeff Morriss <jeff.morriss.ws@xxxxxxxxx>]

Artur Gontijo wrote:
> Hi guys,
>
> I have 2 doubt:
>
> 1 - How can I know the number of packets that was opened?

I'm not aware of a way to do that (unless you only want to count how 
many packets came to your dissector).

> 2 - How can I know when user opens another file? (I want to free some 
> memory before the user opened a new file)

Register an initialization routing with register_init_routine().  This 
is not called when the file is closed but rather when a (new) file is 
opened which is often what you want.