Re: Extcap DLTs

[Dario Lombardo <dario.lombardo.ml () gmail com>]

On Tue, Nov 24, 2015 at 12:55 PM, Roland Knall <rknall () gmail com> wrote:

> You could try USER0. The problem here is, that I have to register the
> extcap interface with the other interfaces at some point, and usually this
> happens way before the capture starts (at which point an extcap utility
> might know which DLT it could produce). Therefore I first ask the utility
> for all interfaces and then for each DLT per interface.
Where is it defined? I can't compile something like

g_print("dlt {number=%u}{name=%s}{display=%s}\n", USER0,
RANDPKT_EXTCAP_INTERFACE, wtap_encap_string(USER0));



> What you could do is provide 5 interfaces, one for each individual DLT.
> This clobbers up the interface list a little bit, but at least you would be
> able to use the correct DLTs for the interfaces. Combine this with a
> preference which interfaces should be supported, and you could reduce the
> clobber a little bit.
I don't like it very much... Having too many interfaces is not likeable.
Expecially when related to this bug



> We actually provide a plug-in with our extcap utility, which allows the
> user to set more generic options via  a gui hook-up (using the plugin_if
> functionality). But you could also use a more generic preference in
> Wireshark itself and read from there.
>
> regards,
> Roland
>
>
> On Tue, Nov 24, 2015 at 12:29 PM, Dario Lombardo <
> dario.lombardo.ml () gmail com> wrote:
>
> > I'm working on a new extcap that will leverage randpkt-core to give
> > wireshark a local random packet generator through randpktdump (the new
> > extcap).
> > I'm stucking with the DLTs part. The extcap must answer to the external
> > call about which DLTs it can generate. Randpkt-core can generate 5
> > different DLTs, depending on the selected packet type.
> > What is the extcap supposed to answer to --extcap-dtls ? When asked for
> > that, the packet type is still not known.
> > Thanks for your help.
> > Dario.
> >
> >
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