Re: A puzzled maintainer with questions regarding

["M.Baris Demiray" <barisdemiray () gmail com>]

On Sun, Mar 13, 2011 at 8:11 PM, Guy Harris <guy () alum mit edu> wrote:
> On Feb 17, 2011, at 11:41 PM, M.Baris Demiray wrote:
>
> > > Do they begin with the 16-bit synchronization sequence, or is that stripped off, so that they begin with the header 
> > > field?  Do data PDUs include the CRC at the end, or is that stripped off?
> >
> > 16-bit synchronization sequence is sent over-the-air for all the types
> > of DPDUs so it's not stripped off. And for data PDUs, yes, they
> > include CRC at the end. So it's like below for data PDUs,
> >
> > | SYNC | HEADER | HEADER_CRC | DATA | DATA_CRC |
> >
> > And like below for control frames (namely DPDU types 1, 3, 5, 6, and 15),
> >
> > | SYNC | HEADER | HEADER_CRC |
>
> OK, so would a complete and accurate description be
>
>        D_PDUs as described by NATO standard STANAG 5066, starting
> with the synchronization sequence, and including both header and data CRCs.
>
> and leave it up to those who can access STANAG 5066 to read it (and possibly provide a link to the old unclassified 
> version)?

Indeed, may be you could also add (along with the link to the old
unclassified version) that new versions of STANAG 5066 haven't
introduced any alterations to D_PDU headers and the last edition,
Edition 3, is totally backward compatible with this old 1.0.2 version;
since this would help to encourage those who want to contribute and/or
debug without a STANAG 5066 specification at hand. But, with or
without this notification, I agree on the definition you wrote.

Thanks,

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-- 
M. Baris Demiray
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