nl80211: Allow SAE Authentication for NL80211_CMD_CONNECT

This commit allows SAE Authentication for NL80211_CMD_CONNECT
interface, provided host driver advertises the support.

Host drivers may offload the SAE authentication to user space
through NL80211_CMD_EXTERNAL_AUTH interface and thus expect
the user space to advertise support to handle offload through
NL80211_ATTR_EXTERNAL_AUTH_SUPPORT in NL80211_CMD_CONNECT
request. Such drivers should reject the connect request on no
offload support from user space.

Signed-off-by: Srinivas Dasari <[e-mail]>
Signed-off-by: Jouni Malinen <[e-mail]>
Signed-off-by: Johannes Berg <[e-mail]>

net/wireless/nl80211.c

···
 			return false;
 		return true;
 	case NL80211_CMD_CONNECT:
-		/* SAE not supported yet */
-		if (auth_type == NL80211_AUTHTYPE_SAE)
+		if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
+		    auth_type == NL80211_AUTHTYPE_SAE)
 			return false;
+
 		/* FILS with SK PFS or PK not supported yet */
 		if (auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
 		    auth_type == NL80211_AUTHTYPE_FILS_PK)