RE: [PATCH] Add Extended NSS BW Support

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>If you look at the second row, you'll note that in this case you have to
>put the "Location of 160 MHz channel center frequency if BSS bandwidth
>is 160 MHz" into CCFS2 (see second-to-last column), so having just this
>bit isn't enough.

Right, it's not enough, also need to ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW) in driver.
ieee80211_chandef_vht_oper() will than set the correct width/center freq.

>In fact, I'd argue we need to be able to have the *driver* advertise
>this NSS restriction (1/2, 3/4) in the VHT capabilities in nl80211, and
>then hostapd build everything according to this table automatically?

In order to include this VHT capability in beacons/assoc req, it must be set to hostapd conf file
same as other capabilities, such as MAX_MPDU_LENGTH_* for example.
What is the alterative ?

>Also, we should then have the ability to also set the "Extended NSS BW
>Support" field to 2/3, not just 1, and probably then automatically
>encode everything according to this table, i.e. setting CCFS2 etc.

Agree, if you approve it should be set to hostapd, I will send a new patch to set each bit separately.
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