Hostapd: enable SHA256-based algorithms

Installing and Using OpenWrt
4

This is not ready for prime time at least for a 1900ac v1 Mamba.
It does prevent de-authentication but slows transfer massively.

iperf3 -c 192.168.1.183 -P6 -t 120

With ieee80211w

[SUM] 0.00-120.00 sec 1.47 GBytes 105 Mbits/sec 52 sender
[SUM] 0.00-120.00 sec 1.47 GBytes 105 Mbits/sec receiver

without ieee80211w

[SUM] 0.00-120.01 sec 5.45 GBytes 390 Mbits/sec 31 sender
[SUM] 0.00-120.01 sec 5.44 GBytes 390 Mbits/sec receiver

iperf3 -c 192.168.1.183 -P6 -t 120 -R

With ieee80211w

[SUM] 0.00-120.00 sec 1.64 GBytes 117 Mbits/sec sender
[SUM] 0.00-120.00 sec 1.63 GBytes 117 Mbits/sec receiver

without ieee80211w

[SUM] 0.00-120.00 sec 5.67 GBytes 406 Mbits/sec sender
[SUM] 0.00-120.00 sec 5.67 GBytes 406 Mbits/sec receiver

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With 80211w and router as iperf3 server

C:\iperf3>iperf3 -c 192.168.1.1 -P6 -t 120

[SUM] 0.00-120.01 sec 610 MBytes 42.7 Mbits/sec sender
[SUM] 0.00-120.01 sec 610 MBytes 42.6 Mbits/sec receiver

without ieee80211w

[SUM] 0.00-120.00 sec 6.10 GBytes 436 Mbits/sec sender
[SUM] 0.00-120.00 sec 6.10 GBytes 436 Mbits/sec receiver

C:\iperf3>iperf3 -c 192.168.1.1 -P6 -t 120 -R

With ieee80211w

[SUM] 0.00-120.00 sec 305 MBytes 21.3 Mbits/sec 43 sender
[SUM] 0.00-120.00 sec 304 MBytes 21.3 Mbits/sec receiver

Without ieee80211w

[SUM] 0.00-120.00 sec 5.39 GBytes 386 Mbits/sec 40 sender
[SUM] 0.00-120.00 sec 5.39 GBytes 386 Mbits/sec receiver