1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index b1bb817d1427..4b501b48ce86 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -18,6 +18,22 @@
 #include <linux/types.h>
 #include <asm/byteorder.h>
 
+/*
+ * DS bit usage
+ *
+ * TA = transmitter address
+ * RA = receiver address
+ * DA = destination address
+ * SA = source address
+ *
+ * ToDS    FromDS  A1(RA)  A2(TA)  A3      A4      Use
+ * -----------------------------------------------------------------
+ *  0       0       DA      SA      BSSID   -       IBSS/DLS
+ *  0       1       DA      BSSID   SA      -       AP -> STA
+ *  1       0       BSSID   SA      DA      -       AP <- STA
+ *  1       1       RA      TA      DA      SA      unspecified (WDS)
+ */
+
 #define FCS_LEN 4
 
 #define IEEE80211_FCTL_VERS             0x0003
@@ -851,6 +867,7 @@ struct ieee80211_ht_info {
 /* Authentication algorithms */
 #define WLAN_AUTH_OPEN 0
 #define WLAN_AUTH_SHARED_KEY 1
+#define WLAN_AUTH_FT 2
 #define WLAN_AUTH_LEAP 128
 
 #define WLAN_AUTH_CHALLENGE_LEN 128