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Diffstat (limited to 'net/mac80211/ieee80211_sta.c')
-rw-r--r--net/mac80211/ieee80211_sta.c50
1 files changed, 38 insertions, 12 deletions
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 9aeed532022..c1706855460 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -312,14 +312,12 @@ static void ieee80211_sta_wmm_params(struct net_device *dev,
}
}
-
-static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
- u8 erp_value)
+static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
+ bool use_protection,
+ bool use_short_preamble)
{
struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
- bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
- bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
DECLARE_MAC_BUF(mac);
u32 changed = 0;
@@ -335,22 +333,47 @@ static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
changed |= BSS_CHANGED_ERP_CTS_PROT;
}
- if (preamble_mode != bss_conf->use_short_preamble) {
+ if (use_short_preamble != bss_conf->use_short_preamble) {
if (net_ratelimit()) {
printk(KERN_DEBUG "%s: switched to %s barker preamble"
" (BSSID=%s)\n",
sdata->dev->name,
- (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
- "short" : "long",
+ use_short_preamble ? "short" : "long",
print_mac(mac, ifsta->bssid));
}
- bss_conf->use_short_preamble = preamble_mode;
+ bss_conf->use_short_preamble = use_short_preamble;
changed |= BSS_CHANGED_ERP_PREAMBLE;
}
return changed;
}
+static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
+ u8 erp_value)
+{
+ bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
+ bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
+
+ return ieee80211_handle_protect_preamb(sdata,
+ use_protection, use_short_preamble);
+}
+
+static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_sta_bss *bss)
+{
+ u32 changed = 0;
+
+ if (bss->has_erp_value)
+ changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
+ else {
+ u16 capab = bss->capability;
+ changed |= ieee80211_handle_protect_preamb(sdata, false,
+ (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
+ }
+
+ return changed;
+}
+
int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
struct ieee80211_ht_info *ht_info)
{
@@ -469,9 +492,7 @@ static void ieee80211_set_associated(struct net_device *dev,
local->hw.conf.channel,
ifsta->ssid, ifsta->ssid_len);
if (bss) {
- if (bss->has_erp_value)
- changed |= ieee80211_handle_erp_ie(
- sdata, bss->erp_value);
+ changed |= ieee80211_handle_bss_capability(sdata, bss);
ieee80211_rx_bss_put(dev, bss);
}
@@ -2117,6 +2138,11 @@ static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
if (elems.erp_info && elems.erp_info_len >= 1)
changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
+ else {
+ u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
+ changed |= ieee80211_handle_protect_preamb(sdata, false,
+ (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
+ }
if (elems.ht_cap_elem && elems.ht_info_elem &&
elems.wmm_param && local->ops->conf_ht &&