Re: ATM Dissector: calling sub-dissector for specific VPI/VCI values only

[Andrii Vladyka via Wireshark-dev <wireshark-dev () wireshark org>]

> Среда, 26 декабря 2018, 11:25 -08:00 от Guy Harris <guy () alum mit edu>:
>
> On Dec 24, 2018, at 10:15 PM, Andrii Vladyka < a.vladyka () ukr net > wrote:
>
> > I have a protocol that works over ATM. I need to develop a sub-dissector that will be called by ATM dissector only 
> > when VPI/VCI pair matches specific values range, otherwise leave ATM payload undissected.
> >
> > Is there a way to register ATM sub-dissectors the same way we do it for UDP/TCP? I.e. when register sub-dissectors 
> > for TCP/UDP we call dissector_add_uint() specifying port number. Is there way to achieve the same for ATM using 
> > VPI/VCI values instead of port number?
>
> Unfortunately, there currently isn't one.
>
> A dissector table that takes a uint value that's ((VPI << 16) | VCI) could be added to the packet-atm.c dissector, 
> with the dissector using that at the appropriate place.
>
> So do you want the subdissector to be handed raw ATM cells, AAL5 packet payload, or something else?
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Hello Guy,
Thanks for confirming. The sub-dissector should be handed just 48 bytes of ATM payload. 

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