Wireshark · Wireshark-dev: Re: [Wireshark-dev] ATM Dissector: calling sub-dissector for specific VPI/VCI values only

[Andrii Vladyka <tulup@xxxxxxx>]

>Среда, 26 декабря 2018, 11:25 -08:00 от Guy Harris <guy@xxxxxxxxxxxx>:
>
>On Dec 24, 2018, at 10:15 PM, Andrii Vladyka < a.vladyka@xxxxxxx > 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.