Wireshark-bugs: [Wireshark-bugs] [Bug 6718] Wiretap API needs to handle pcap-NG ISB blocks

Date: Mon, 5 Mar 2012 12:23:03 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6718

--- Comment #10 from Jose Pedro Oliveira <jpo@xxxxxxxxxxxx> 2012-03-05 12:23:03 PST ---
(In reply to comment #9)
> (In reply to comment #8)
> > (In reply to comment #7)
> > > (In reply to comment #6)
> > > > (In reply to comment #5)
...
> > Still regarding the if_filter option: should we allow this option to be
> > repeated?  I'm asking this because I think it should be a good idea to also
> > store the wireshark's display filters.
> > 
> >   tshark -R "<display filter here>" -r in.pcapng -w out.pcapng
> > 
> > Would it make sense to allow n display filters (keep the ones in the source
> > file add add the new one to the output file) ?
> > 
> >   tshark -R "<second display filter here>" -r out.pcapng -w out2.pcapng
> > 
> > Note: The display filter needs to be registered ( 0 = lipbpcap filter string, 1
> > = libpcap byte code, 2 = wireshark display filter string ? )
> > 
> > /jpo
> 
> There is a thread just started on this subject on the developers mailing list.

I believe this is the ml thread in question:

 * [Wireshark-dev] Store selected Wireshark prefs in pcapng capture file ?
   https://www.wireshark.org/lists/wireshark-dev/201203/msg00057.html

> I would propose a new option "shb_ws_display_filter" Wireshark display filter
> string. Can occure multiple times.
>
> One could the build a GUI item with a list of the filters, which can be
> selected and applied. Possibly there should also be
> "shb_ws_display_filter_comment" coupled to the display filter where one could
> describe the filter.

I believe we are describing different use cases for the display filters:

 * Your use case appears to be GUI oriented, ie, store all display filters the
user applied during a Wireshark session so that they can be reused in a
following session.

 * In my use case it should be an IDB filter option as the new output file only
has packets matching the display filter (it works like a capture filter).

/jpo

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