mac80211: Robust Action frame categories for MFP

IEEE 802.11w/D9.0 introduces a mechanism for Action field Category
values to be used to select which Action frames are Robust. Public and
Vendor-specific categories are marked as not Robust in IEEE 802.11w;
HT will be marked not Robust in IEEE 802.11n. A new Vendor-specific
Protected category is allocated for Robust vendor-specific Action
frames. Another new category, Protected Dual of Action, is introduced
for protecting some existing Public Action frames (e.g., IEEE 802.11y
protected enablement).
Signed-off-by: NJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

include/linux/ieee80211.h

@@ -1068,8 +1068,12 @@ enum ieee80211_category {
 	WLAN_CATEGORY_DLS = 2,
 	WLAN_CATEGORY_BACK = 3,
 	WLAN_CATEGORY_PUBLIC = 4,
+	WLAN_CATEGORY_HT = 7,
 	WLAN_CATEGORY_SA_QUERY = 8,
+	WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
 	WLAN_CATEGORY_WMM = 17,
+	WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
+	WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
 };
 
 /* SPECTRUM_MGMT action code */
@@ -1261,7 +1265,9 @@ static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
 		if (ieee80211_has_protected(hdr->frame_control))
 			return true;
 		category = ((u8 *) hdr) + 24;
-		return *category != WLAN_CATEGORY_PUBLIC;
+		return *category != WLAN_CATEGORY_PUBLIC &&
+			*category != WLAN_CATEGORY_HT &&
+			*category != WLAN_CATEGORY_VENDOR_SPECIFIC;
 	}
 
 	return false;