mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-21 00:10:09 +00:00
Code Issues Releases Wiki Activity

mac80211: remove ieee80211_get_hdrlen

Browse source 
All users have been moved over to the version taking a le16 frame control
rather than a cpu-endian value.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Harvey Harrison 2008-07-15 18:44:12 -07:00 committed by John W. Linville
parent b73d70ad86
commit 6b644e524b
2 changed files with 0 additions and 49 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
include/net/mac80211.h
View file

@ -1558,16 +1558,6 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
*/
unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
/**
* ieee80211_get_hdrlen - get header length from frame control
*
* This function returns the 802.11 header length in bytes (not including
* encryption headers.)
*
* @fc: the frame control field (in CPU endianness)
*/
int ieee80211_get_hdrlen(u16 fc);
/**
* ieee80211_hdrlen - get header length in bytes from frame control
* @fc: frame control field in little-endian format

39
net/mac80211/util.c
View file

@ -91,45 +91,6 @@ u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
return NULL;
}
int ieee80211_get_hdrlen(u16 fc)
{
int hdrlen = 24;
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
hdrlen = 30; /* Addr4 */
/*
* The QoS Control field is two bytes and its presence is
* indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
* hdrlen if that bit is set.
* This works by masking out the bit and shifting it to
* bit position 1 so the result has the value 0 or 2.
*/
hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
>> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
break;
case IEEE80211_FTYPE_CTL:
/*
* ACK and CTS are 10 bytes, all others 16. To see how
* to get this condition consider
* subtype mask: 0b0000000011110000 (0x00F0)
* ACK subtype: 0b0000000011010000 (0x00D0)
* CTS subtype: 0b0000000011000000 (0x00C0)
* bits that matter: ^^^ (0x00E0)
* value of those: 0b0000000011000000 (0x00C0)
*/
if ((fc & 0xE0) == 0xC0)
hdrlen = 10;
else
hdrlen = 16;
break;
}
return hdrlen;
}
EXPORT_SYMBOL(ieee80211_get_hdrlen);
unsigned int ieee80211_hdrlen(__le16 fc)
{
unsigned int hdrlen = 24;