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Commit 3f46b29c authored Mar 14, 2009 by Johannes Berg Committed by John W. Linville Mar 27, 2009

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>

parent 85067c06

include/linux/ieee80211.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -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