diff options
| author | Michael Wu <flamingice@sourmilk.net> | 2007-10-30 20:50:05 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 22:54:20 (GMT) |
| commit | c237899d1f8c5bfcfc9d6204052e0e065827ff75 (patch) | |
| tree | b107bd8355b8e3e423a980c86f0a304242e718ed | |
| parent | 6a4329554c527e86c2745bc001c29bb8d1b8efaf (diff) | |
| download | linux-c237899d1f8c5bfcfc9d6204052e0e065827ff75.tar.xz | |
ieee80211: Add IEEE80211_MAX_FRAME_LEN to linux/ieee80211.h
This patch adds IEEE80211_MAX_FRAME_LEN which is useful for drivers trying
to determine how much to allocate for their RX buffers.
It also updates the comment on IEEE80211_MAX_DATA_LEN based on revisions
in 802.11e.
IEEE80211_MAX_FRAG_THRESHOLD and IEEE80211_MAX_RTS_THRESHOLD are also
revised due to the new maximum frame size.
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/ieee80211.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 30621c2..214821a 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -81,18 +81,18 @@ /* miscellaneous IEEE 802.11 constants */ -#define IEEE80211_MAX_FRAG_THRESHOLD 2346 -#define IEEE80211_MAX_RTS_THRESHOLD 2347 +#define IEEE80211_MAX_FRAG_THRESHOLD 2352 +#define IEEE80211_MAX_RTS_THRESHOLD 2353 #define IEEE80211_MAX_AID 2007 #define IEEE80211_MAX_TIM_LEN 251 -#define IEEE80211_MAX_DATA_LEN 2304 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section 6.2.1.1.2. - The figure in section 7.1.2 suggests a body size of up to 2312 - bytes is allowed, which is a bit confusing, I suspect this - represents the 2304 bytes of real data, plus a possible 8 bytes of - WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */ + 802.11e clarifies the figure in section 7.1.2. The frame body is + up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */ +#define IEEE80211_MAX_DATA_LEN 2304 +/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */ +#define IEEE80211_MAX_FRAME_LEN 2352 #define IEEE80211_MAX_SSID_LEN 32 |