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mac80211: use new helpers in util.c - ieee80211_get_bssid() 

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 2008-06-11 14:21:58 -07:00 committed by John W. Linville
parent d5184cacf3
commit a494bb1cae
1 changed files with 19 additions and 22 deletions
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41
net/mac80211/util.c
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@ -45,38 +45,37 @@ const unsigned char bridge_tunnel_header[] __aligned(2) =
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
enum ieee80211_if_types type)
{
u16 fc;
__le16 fc = hdr->frame_control;
/* drop ACK/CTS frames and incorrect hdr len (ctrl) */
if (len < 16)
return NULL;
fc = le16_to_cpu(hdr->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_DATA:
if (ieee80211_is_data(fc)) {
if (len < 24) /* drop incorrect hdr len (data) */
return NULL;
switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
case IEEE80211_FCTL_TODS:
return hdr->addr1;
case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
if (ieee80211_has_a4(fc))
return NULL;
case IEEE80211_FCTL_FROMDS:
if (ieee80211_has_tods(fc))
return hdr->addr1;
if (ieee80211_has_fromds(fc))
return hdr->addr2;
case 0:
return hdr->addr3;
}
break;
case IEEE80211_FTYPE_MGMT:
return hdr->addr3;
}
if (ieee80211_is_mgmt(fc)) {
if (len < 24) /* drop incorrect hdr len (mgmt) */
return NULL;
return hdr->addr3;
case IEEE80211_FTYPE_CTL:
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
}
if (ieee80211_is_ctl(fc)) {
if(ieee80211_is_pspoll(fc))
return hdr->addr1;
else if ((fc & IEEE80211_FCTL_STYPE) ==
IEEE80211_STYPE_BACK_REQ) {
if (ieee80211_is_back_req(fc)) {
switch (type) {
case IEEE80211_IF_TYPE_STA:
return hdr->addr2;
@ -84,11 +83,9 @@ u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
case IEEE80211_IF_TYPE_VLAN:
return hdr->addr1;
default:
return NULL;
break; /* fall through to the return */
}
}
else
return NULL;
}
return NULL;