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| author | Johannes Berg <johannes@sipsolutions.net> | 2009-03-14 21:10:51 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-28 03:12:54 +0300 |
| commit | 3f46b29cd8caa35fcbc46e254a5abeee4e0e9e2f (patch) | |
| tree | a1fbe9021a0f8ce46fc0bc1bc76e842774ab4f1f | |
| parent | 85067c06ba0329c37d5a357ced1f39a5583ccc98 (diff) | |
| download | linux-3f46b29cd8caa35fcbc46e254a5abeee4e0e9e2f.tar.xz | |
ieee80211: document DS bit usage
I keep needing this because I'm too stupid to remember it.
Everybody else can probably remember, but who knows :)
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | include/linux/ieee80211.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index b1bb817d1427..382387e75b89 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 |