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[PATCH] mac80211: store channel info in sta_bss_list

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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@tuxdriver.com>
This commit is contained in:
John W. Linville 2007-10-05 14:23:27 -04:00
parent 1dd84aa213
commit 65c107ab3b
1 changed files with 19 additions and 15 deletions
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34
net/mac80211/ieee80211_sta.c
View file

@ -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,
@ -427,7 +427,8 @@ static void ieee80211_set_associated(struct net_device *dev,
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);
@ -574,7 +575,7 @@ static void ieee80211_send_assoc(struct net_device *dev,
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;
@ -722,6 +723,7 @@ static void ieee80211_send_disassoc(struct net_device *dev,
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;
@ -729,7 +731,7 @@ static int ieee80211_privacy_mismatch(struct net_device *dev,
ifsta->key_management_enabled)
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;
@ -1242,7 +1244,8 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
* 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;
@ -1272,7 +1275,8 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
" 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;
@ -1348,7 +1352,7 @@ static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
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;
@ -1359,6 +1363,7 @@ ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
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? */
@ -1370,7 +1375,7 @@ ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
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;
@ -1378,7 +1383,8 @@ ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
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;
}
@ -1546,9 +1552,9 @@ static void ieee80211_rx_bss_info(struct net_device *dev,
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 {
@ -1648,7 +1654,6 @@ static void ieee80211_rx_bss_info(struct net_device *dev,
bss->hw_mode = rx_status->phymode;
bss->channel = channel;
bss->freq = rx_status->freq;
if (channel != rx_status->channel &&
(bss->hw_mode == MODE_IEEE80211G ||
@ -2399,7 +2404,7 @@ static int ieee80211_sta_create_ibss(struct net_device *dev,
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
dev->name, print_mac(mac, bssid));
bss = ieee80211_rx_bss_add(dev, bssid);
bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel);
if (!bss)
return -ENOMEM;
@ -2410,7 +2415,6 @@ static int ieee80211_sta_create_ibss(struct net_device *dev,
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;
@ -2470,7 +2474,7 @@ static int ieee80211_sta_find_ibss(struct net_device *dev,
"%s\n", print_mac(mac, bssid), print_mac(mac2, 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 %s"
" based on configured SSID\n",
dev->name, print_mac(mac, bssid));