[PATCH] wpa_supplicant: add support for VHT selector

Michal Kazior michal.kazior
Wed Jul 3 03:00:27 PDT 2013

On 3 July 2013 11:25, Johannes Berg <johannes at sipsolutions.net> wrote:
> On Wed, 2013-07-03 at 11:05 +0200, Michal Kazior wrote:
>> But there doesn't seem to be a vht_supported() from what I can tell.
> Yeah, that's missing.
>> Do you know what should be checked to verify vht support in this case?
>> Is it similar to 11n that a single spatial stream with mcs 0-7 (the
>> minimal rate subset I suppose) is required for non-AP STA in 11ac or
>> that the first stream mcs bitmask is set to either 0,1,2 (3 meaning
>> not supported)?
> Not MCS bitmap, "vht_mcs_set" is relevant for VHT.

Yes. I meant vht mcs of course.

> It seems to me that we'd need a new flag
> HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN that driver_nl80211 sets
> unconditionally (see phy_info_band()/phy_info_vht_capa() there).
> It seems I forgot to add a flag saying "VHT is supported", and never
> even set vht_mcs_set to ff:ff:ff:ff:ff:ff:ff:ff, so maybe this is all
> completely wrong now?

Yes. It seems phy_info_vht_capa() should set "ff:ff.." if there's no
vht mcs in nlattr, but it doesn't. I'll do some tests and send up
patches later. Thanks!

Pozdrawiam / Best regards,
Micha? Kazior.

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