Re: DLT_LAPB value assignment

["Fulko Hew" <fulko.hew () gmail com>]

On 8/17/07, Guy Harris <guy () alum mit edu> wrote:
> Mirko.Karanovic () ttc ca wrote:
>
> > Here is possible solution to resolve DCE/DTE origin of a LAPB packet.
> >
> > Wireshark libpcap.h has the  struct pcaprec_ss990915_hdr, which has
> > ifindex field ( the interface on which packet came in ). During
> > capturing phase FROM_DCE or FROM_DTE will be stored into ifindex field
> > of the struct pcaprec_ss990915_hdr. Knowing interface index I know
> > origin, DCE or DTE.
>
> No, please, don't use the non-standard versions of libpcap format - and
> especially don't override a completely different field.  Just put an
> extra byte at the beginning of the packet data.




Mirko, I emailed you off list to discuss merging our two requirements since
they seemed to overlap.

This is exactly (one of) the purpose(s) of the DLT I asked for, and I _do_
have extra bytes at the front for this purpose and also to convey serial
link status information,  perhaps you can re-use my DLT for your capture.

Because of the tcpdump mailserver problem a while ago I haven't re-submitted
my patches yet.  I'm on vacation this week (for another 20 minutes
technically), so I expect to do it on Monday, but we can discuss this next
week.

Fulko
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