wifi: mac80211: add generic MMIE struct defines

The added struct is needed when writing generic handler for both CMAC-128
and CMAC-256.

Signed-off-by: Chien Wong <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

include/linux/ieee80211.h

···
 #define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)
 
 
-/* Management MIC information element (IEEE 802.11w) */
+/* Management MIC information element (IEEE 802.11w) for CMAC */
 struct ieee80211_mmie {
 	u8 element_id;
 	u8 length;
···
 	__le16 key_id;
 	u8 sequence_number[6];
 	u8 mic[16];
+} __packed;
+
+/* Management MIC information element (IEEE 802.11w) for all variants */
+struct ieee80211_mmie_var {
+	u8 element_id;
+	u8 length;
+	__le16 key_id;
+	u8 sequence_number[6];
+	u8 mic[]; /* 8 or 16 bytes */
 } __packed;
 
 struct ieee80211_vendor_ie {
···
 #define IEEE80211_GCMP_HDR_LEN		8
 #define IEEE80211_GCMP_MIC_LEN		16
 #define IEEE80211_GCMP_PN_LEN		6
+#define IEEE80211_CMAC_128_MIC_LEN	8
+#define IEEE80211_CMAC_256_MIC_LEN	16
+#define IEEE80211_GMAC_MIC_LEN		16
 
 #define FILS_NONCE_LEN			16
 #define FILS_MAX_KEK_LEN		64