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cfg80211: assimilate and export ieee80211_bss_get_ie 

This function from mac80211 seems generally useful, and
I will need it in cfg80211 soon.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-07-02 17:18:40 +02:00 committed by John W. Linville
parent 0eb14647fc
commit 517357c685
3 changed files with 33 additions and 22 deletions
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9
include/net/cfg80211.h
View File

@ -604,6 +604,15 @@ struct cfg80211_bss {
u8 priv[0] __attribute__((__aligned__(sizeof(void *))));
};
/**
* ieee80211_bss_get_ie - find IE with given ID
* @bss: the bss to search
* @ie: the IE ID
* Returns %NULL if not found.
*/
const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie);
/**
* struct cfg80211_crypto_settings - Crypto settings
* @wpa_versions: indicates which, if any, WPA versions are enabled

25
net/mac80211/mlme.c
View File

@ -46,26 +46,6 @@ static int ecw2cw(int ecw)
return (1 << ecw) - 1;
}
static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
{
u8 *end, *pos;
pos = bss->cbss.information_elements;
if (pos == NULL)
return NULL;
end = pos + bss->cbss.len_information_elements;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == ie)
return pos;
pos += 2 + pos[1];
}
return NULL;
}
static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
struct ieee80211_supported_band *sband,
u32 *rates)
@ -181,7 +161,8 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
u8 *pos, *ies, *ht_ie;
u8 *pos;
const u8 *ies, *ht_ie;
int i, len, count, rates_len, supp_rates_len;
u16 capab;
struct ieee80211_bss *bss;
@ -345,7 +326,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
*/
if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
sband->ht_cap.ht_supported &&
(ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
(ht_ie = ieee80211_bss_get_ie(&bss->cbss, WLAN_EID_HT_INFORMATION)) &&
ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
(!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
struct ieee80211_ht_info *ht_info =

21
net/wireless/util.c
View File

@ -502,3 +502,24 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb)
return dscp >> 5;
}
EXPORT_SYMBOL(cfg80211_classify8021d);
const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
{
u8 *end, *pos;
pos = bss->information_elements;
if (pos == NULL)
return NULL;
end = pos + bss->len_information_elements;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == ie)
return pos;
pos += 2 + pos[1];
}
return NULL;
}
EXPORT_SYMBOL(ieee80211_bss_get_ie);