[PATCH 1/2] Explicitly require WMM to be enabled if HT (11n) or VHT (11ac) is enabled

Nick Lowe nick.lowe at lugatech.com
Sat Feb 25 07:13:40 PST 2017

Hi Jouni,

I forgot to include patch 4 which makes that very change. I have now
sent that. Sorry.

The 802.11n, ac and ax specs expect devices to support 802.11e QoS in
order to use HT/VHT/HE rates. This is because the TID field is key to
aggregation mechanisms, including block ACKs, that enable high
throughput rates.

Where WMM is configured to be disabled and HT/VHT/HE support are
configured hostapd should fail to start therefore so that this
explicitly fails and the configuration can be corrected.

We could silently enable WMM where HT/VHT/HE support are configured
and a WMM is not defined. I think, however, that it is cleaner and
more logically consistent to require it to be explicitly enabled in
that case.



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