use of WLAN_EXT_CAPA8_OPMODE_NOTIF in hostapd/wpa_supplicant

Atul Joshi Atul.Joshi
Mon Apr 6 02:31:53 PDT 2015

Hostapd/wpa_supplicant  gets the driver capabilities as a part of initilisation.
As a part of this procedure, even extended capabilities are passed by mac80211/cfg80211 to the user space.
I  can see that while other extended capabilities are filled in, in main.c in mac80211 WLAN_EXT_CAPA8_OPMODE_NOTIF is also  set (it is used to set bit 6 of octet 7)
Hostpad/wpa_supplicant does not read this and just stores it, resulting in extended_capabilities IE in various messages to have 8 octets and this the last octet set to 0x40.
Why is this bit set and how is it supposed  to be used in hostapd/wpa_supplicant?


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