Re: Patch: Prepare for some cleanups of 802.11ad

[Richard Sharpe <realrichardsharpe () gmail com>]

On Sat, Aug 22, 2015 at 4:57 PM, Guy Harris <guy () alum mit edu> wrote:
> On Aug 22, 2015, at 2:30 PM, Guy Harris <guy () alum mit edu> wrote:
>
> > So software that reads radiotap captures and that cares about 11ad information needs to have a workaround wherein 
> > frames lacking a DMG field (which means "all frames", currently, as there isn't yet a DMG field) and having a 
> > channel frequency in the 11ad range have an 11ad PHY and, if they have MCS or VHT fields, ignore all items in those 
> > fields that don't apply to 11ad and *perhaps* interpret the MCS value in the MCS field as if it were an 11ad MCS 
> > value rather than an 11n MCS value.
>
> Note that Channel's presence bit index is 3, XChannel's is 18, MCS's is 19, and VHT's is 21, so by the time you see 
> an MCS or VHT field you would already have the channel frequency (if it's present) and thus, if you see an MCS or VHT 
> field, you would already know whether you have an 11ad frame and can process it appropriately.

I agree.

What I would like to do is take this a step at a time. I will update
the change to include the prototype DMG/802.11ad structure addition to
the phdr structure.

Once that is in for review I can come up with a patch to assemble that
information correctly and we can review it on the mailing list.

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)
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