Re: [PATCH] add support for showing power constraint IE

Johannes Berg
2009-05-04T18:04:14Z

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On Mon, 2009-05-04 at 10:48 -0700, Marcel Holtmann wrote:

> > Both are HT.
>
> do we have the specs somewhere then I might can give it a try. Also WMM
> needs some improvements.

The IEs are defined in structs in include/linux/ieee80211.h.

> > > The other one that keeps showing up in my area is:
> > >
> > > Unknown IE (47): 06
> >
> > "Broadcom proprietary" -- seems it would make sense to ignore that.
>
> Since it not showing up until you give -u there is no need to ignore it,
> but where do you find that this is Broadcom proprietary and why the f*
> they get to use an official IE number?

Check the link I gave you - lots of companies have IEs rather than
vendor IEs, predates the vendor IE I guess.

> > > And I do have some other vendor specific ones, that I don't really care
> > > about and we might even never know what they are:
> > >
> > > Vendor specific: OUI 00:03:7f, data: 01 01 00 17 00 00
> > > Vendor specific: OUI 00:03:7f, data: 02 01 01 4d 00 03 a4 00 00
> > > Vendor specific: OUI 00:03:2f, data: 01 00 01
> >
> > You can check wireshark, sometimes it has something useful. I think
> > there are pre-wifi HT IEs too in some vendor IE, might be one of these.
> >
> > https://mentor.ieee.org/802.11/documents?x_dcn=31&x_year=2009 is useful
> > too (at least for 2009, for next year somebody will have to find the DCN
> > again)
>
> I found an indication of what bit 1 of extended capabilities means. I do
> have seen an AP with that somewhere around :)

Actually extended capabilities aren't bits but values, I think? But
that's something about HT too, iirc.