On 12/19/2017 12:19 PM, Sergey Matyukevich wrote:
Not yet. At the moment enum nl80211_ap_sme_features in uapi/linux/nl80211.h
is commented out. For MAC-based ACL the following things are being checked
on wiphy registration: complete flag WIPHY_FLAG_HAVE_AP_SME, non-zero
max_acl_mac_addrs, and set_mac_acl cfg80211 callback.

I guess that's enough then? Userspace can check max_acl_mac_addrs as
well, so it can just use that?

Correct, that is what hostapd is doing. I was simply surprised by the fact
that MAC-based ACL support implies full-fledged AP SME support. Though
your almost convinced me that this is ok and other wireless cards simply
do not exist.

So the question seems to be here: what shall drivers/firmware implement to allow flag WIPHY_FLAG_HAVE_AP_SME being set. The kerneldoc is a bit short in providing guidance:

 * @WIPHY_FLAG_HAVE_AP_SME: device integrates AP SME

Regards,
Arend

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