Enabling HT20 in Adhoc mode using Wpa_Supplicant

[Douglas Diniz]

Hi, how can I enable HT20 rates in adhoc mode using wpa_supplicant?

I have two terminals, using a Ubiquiti SR71-A on each terminal, and
manually I can do this:

Terminal1:

iw wlan0 del
iw phy phy0 interface add wlan0 type ibss
ifconfig wlan0 10.1.1.1 netmask 255.255.255.0
iw dev wlan0 ibss join dougEssid 2412 HT20 00:11:11:11:11:11

Terminal2:

iw wlan0 del
iw phy phy0 interface add wlan0 type ibss
ifconfig wlan0 10.1.1.2 netmask 255.255.255.0
iw dev wlan0 ibss join dougEssid 2412 HT20 00:11:11:11:11:11


, and this way I can get a rate of >50Mb/s with iperf.
It's exactly the same rate I get with mode Master/Managed using hostapd
configured with HT20.

But using wpa_supplicant I can get only ~22MB/s with iperf.

So is there a way to force wpa_supplicant to use HT20 rates when in adhoc
mode?

My wpa_supplicant.conf looks like this:

ctrl_interface=/var/run/wpa_supplicant
eapol_version=1
ap_scan=1
fast_reauth=1
network={
   mode=1
   frequency= 2412
   ssid="dougEssid"
   bssid=00:11:11:11:11:11
   key_mgmt=NONE
}

I'm using wpa_supplicant 1.0, but I also tried the last snapshot today with
same results....

Thanks.....
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