[Bug 264238] wpa_supplicant 2.10 fails to associate to open secondary VAP when primary VAP is WPA

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264238

--- Comment #175 from J.R. Oldroyd <fbsd@opal.com> ---
(In reply to Bjoern A. Zeeb from comment #174)

Hmm.

I am looking at IEEE 802.11-2016 in section 9.4.2.1 (pg 784).

  Element ID 127 is defined as:
    Extended Capabilities (see 9.4.2.27)

  Element ID 255 is defined as:
    Reserved for elements using the Element ID Extension field

Section 9.4.2.27 (pg 890) describes the Extended Capabilities element.

EID 255 indicates the WLAN_EID_EXT_* values.

EID 127 indicates the WLAN_EXT_CAPAB_* values.

So, I may have been confused with wpa_supplicant's use of _EXT_ to mean both
"EXTension field" and "EXTended Capabilities".

I will need to research further to see if there is a third function for
checking IEs with WLAN_EXT_CAPAB_* values.  Or if there should be.

That said, I can confirm that this patch is associating with both the OPEN
secondary and the WPA primary (given appropriate config wpa_supplicant.conf). 
Perhaps that was just a coincidence.

I need to go out shortly to run some errands for a few hours but will do some
additional analysis and testing when I get back.

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