On May 20, 2009, at 2:15 PM, Guy Harris wrote:
>
> On May 20, 2009, at 5:19 AM, Florian FAVIER wrote:
>
>> We are now writing a new dissector for the Asterix protocol,
>
> I assume you mean "ASTERIX protocol":
>
> http://www.eurocontrol.int/asterix/public/subsite_homepage/homepage.html
>
>> and we would like to call it when the LLC dissector is running.
>>
>> The condition is when the third byte of LLC is equal to 0x03, we
>> have to call our dissector.
>
> In other words, the Asterix protocol prevents most SNAP-based or
> otherwise 802.2-based protocols from working on any machine using it?
> "When the third byte of LLC is equal to 0x03" is equivalent to "when
> the packet is an LLC UI frame", and most packets on 802.2-based
> networks are LLC UI frames.
If you *do* mean the ASTERIX protocol, then, at least according to
Figure 1 in
http://www.comsoft.de/download/atc/background/rmcde_atca97.pdf
ASTERIX runs atop a transport or session-layer protocol, so its
dissector should *NOT* be called by the LLC dissector.
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