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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>
This commit is contained in:
Michael Wu 2007-10-30 16:50:05 -04:00 committed by David S. Miller
parent 6a4329554c
commit c237899d1f
1 changed files with 7 additions and 7 deletions
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14
include/linux/ieee80211.h
View File

@ -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