-stable review patch. If anyone has any objections, please let us know.
------------------
From: John W. Linville <linville@xxxxxxxxxxxxx>
patch 65c107ab3befc37b21d1c970a6159525bc0121b8 in mainline.
Some AP equipment "in the wild" uses the same BSSID on multiple channels
(particularly "a" vs. "b/g"). This patch changes the key of sta_bss_list
to include both the BSSID and the channel so as to prevent a BSSID on
one channel from eclipsing the same BSSID on another channel.
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
net/mac80211/ieee80211_sta.c | 35 ++++++++++++++++++++---------------
1 file changed, 20 insertions(+), 15 deletions(-)
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -61,7 +61,7 @@
static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
u8 *ssid, size_t ssid_len);
static struct ieee80211_sta_bss *
-ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
+ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel);
static void ieee80211_rx_bss_put(struct net_device *dev,
struct ieee80211_sta_bss *bss);
static int ieee80211_sta_find_ibss(struct net_device *dev,
@@ -387,6 +387,7 @@ static void ieee80211_set_associated(str
struct ieee80211_if_sta *ifsta, int assoc)
{
union iwreq_data wrqu;
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (ifsta->associated == assoc)
@@ -401,7 +402,8 @@ static void ieee80211_set_associated(str
if (sdata->type != IEEE80211_IF_TYPE_STA)
return;
- bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
+ local->hw.conf.channel);
if (bss) {
if (bss->has_erp_value)
ieee80211_handle_erp_ie(dev, bss->erp_value);
@@ -543,7 +545,7 @@ static void ieee80211_send_assoc(struct
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
WLAN_CAPABILITY_SHORT_PREAMBLE;
}
- bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel);
if (bss) {
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
capab |= WLAN_CAPABILITY_PRIVACY;
@@ -695,6 +697,7 @@ static void ieee80211_send_disassoc(stru
static int ieee80211_privacy_mismatch(struct net_device *dev,
struct ieee80211_if_sta *ifsta)
{
+ struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sta_bss *bss;
int res = 0;
@@ -702,7 +705,7 @@ static int ieee80211_privacy_mismatch(st
ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
return 0;
- bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel);
if (!bss)
return 0;
@@ -1211,7 +1214,8 @@ static void ieee80211_rx_mgmt_assoc_resp
* update our stored copy */
if (elems.erp_info && elems.erp_info_len >= 1) {
struct ieee80211_sta_bss *bss
- = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ = ieee80211_rx_bss_get(dev, ifsta->bssid,
+ local->hw.conf.channel);
if (bss) {
bss->erp_value = elems.erp_info[0];
bss->has_erp_value = 1;
@@ -1241,7 +1245,8 @@ static void ieee80211_rx_mgmt_assoc_resp
" AP\n", dev->name);
return;
}
- bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
+ bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
+ local->hw.conf.channel);
if (bss) {
sta->last_rssi = bss->rssi;
sta->last_signal = bss->signal;
@@ -1322,7 +1327,7 @@ static void __ieee80211_rx_bss_hash_del(
static struct ieee80211_sta_bss *
-ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
+ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sta_bss *bss;
@@ -1333,6 +1338,7 @@ ieee80211_rx_bss_add(struct net_device *
atomic_inc(&bss->users);
atomic_inc(&bss->users);
memcpy(bss->bssid, bssid, ETH_ALEN);
+ bss->channel = channel;
spin_lock_bh(&local->sta_bss_lock);
/* TODO: order by RSSI? */
@@ -1344,7 +1350,7 @@ ieee80211_rx_bss_add(struct net_device *
static struct ieee80211_sta_bss *
-ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
+ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sta_bss *bss;
@@ -1352,7 +1358,8 @@ ieee80211_rx_bss_get(struct net_device *
spin_lock_bh(&local->sta_bss_lock);
bss = local->sta_bss_hash[STA_HASH(bssid)];
while (bss) {
- if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
+ if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
+ bss->channel == channel) {
atomic_inc(&bss->users);
break;
}
@@ -1520,9 +1527,9 @@ static void ieee80211_rx_bss_info(struct
else
channel = rx_status->channel;
- bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
+ bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel);
if (!bss) {
- bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
+ bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel);
if (!bss)
return;
} else {
@@ -1622,7 +1629,6 @@ static void ieee80211_rx_bss_info(struct
bss->hw_mode = rx_status->phymode;
- bss->channel = channel;
bss->freq = rx_status->freq;
if (channel != rx_status->channel &&
(bss->hw_mode == MODE_IEEE80211G ||
@@ -2355,7 +2361,7 @@ static int ieee80211_sta_create_ibss(str
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
dev->name, MAC_ARG(bssid));
- bss = ieee80211_rx_bss_add(dev, bssid);
+ bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel);
if (!bss)
return -ENOMEM;
@@ -2366,7 +2372,6 @@ static int ieee80211_sta_create_ibss(str
local->hw.conf.beacon_int = 100;
bss->beacon_int = local->hw.conf.beacon_int;
bss->hw_mode = local->hw.conf.phymode;
- bss->channel = local->hw.conf.channel;
bss->freq = local->hw.conf.freq;
bss->last_update = jiffies;
bss->capability = WLAN_CAPABILITY_IBSS;
@@ -2426,7 +2431,7 @@ static int ieee80211_sta_find_ibss(struc
MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
- (bss = ieee80211_rx_bss_get(dev, bssid))) {
+ (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel))) {
printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
" based on configured SSID\n",
dev->name, MAC_ARG(bssid));
--
-
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