This patch cleanup the fixed BSSID handling, that ieee80211_sta_set_bssid() works like ieee80211_sta_set_ssid(). So that the BSSID is only a second selection criterion besides the SSID. This allows us to create new IBSS networks with fixed BSSIDs, which was broken before.
Signed-off-by: Alina Friedrichsen <x-alina@xxxxxxx>
---
diff -urN compat-wireless-2009-01-16.orig/net/mac80211/mlme.c compat-wireless-2009-01-16/net/mac80211/mlme.c
--- compat-wireless-2009-01-16.orig/net/mac80211/mlme.c 2009-01-16 23:17:49.000000000 +0100
+++ compat-wireless-2009-01-16/net/mac80211/mlme.c 2009-01-19 09:56:21.000000000 +0100
@@ -1613,6 +1613,7 @@
ieee80211_sta_def_wmm_params(sdata, bss);
+ ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
@@ -1756,7 +1757,8 @@
(unsigned long long)(rx_timestamp - beacon_timestamp),
jiffies);
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
- if (beacon_timestamp > rx_timestamp) {
+ if (beacon_timestamp > rx_timestamp &&
+ memcmp(sdata->u.sta.bssid, mgmt->bssid, ETH_ALEN) != 0) {
#ifdef CONFIG_MAC80211_IBSS_DEBUG
printk(KERN_DEBUG "%s: beacon TSF higher than "
"local TSF - IBSS merge with BSSID %pM\n",
@@ -2176,19 +2178,18 @@
int i;
int ret;
-#if 0
- /* Easier testing, use fixed BSSID. */
- memset(bssid, 0xfe, ETH_ALEN);
-#else
- /* Generate random, not broadcast, locally administered BSSID. Mix in
- * own MAC address to make sure that devices that do not have proper
- * random number generator get different BSSID. */
- get_random_bytes(bssid, ETH_ALEN);
- for (i = 0; i < ETH_ALEN; i++)
- bssid[i] ^= sdata->dev->dev_addr[i];
- bssid[0] &= ~0x01;
- bssid[0] |= 0x02;
-#endif
+ if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
+ memcpy(bssid, ifsta->bssid, ETH_ALEN);
+ } else {
+ /* Generate random, not broadcast, locally administered BSSID. Mix in
+ * own MAC address to make sure that devices that do not have proper
+ * random number generator get different BSSID. */
+ get_random_bytes(bssid, ETH_ALEN);
+ for (i = 0; i < ETH_ALEN; i++)
+ bssid[i] ^= sdata->dev->dev_addr[i];
+ bssid[0] &= ~0x01;
+ bssid[0] |= 0x02;
+ }
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
sdata->dev->name, bssid);
@@ -2249,6 +2250,9 @@
memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
|| !(bss->capability & WLAN_CAPABILITY_IBSS))
continue;
+ if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
+ memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
+ continue;
#ifdef CONFIG_MAC80211_IBSS_DEBUG
printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
@@ -2265,7 +2269,9 @@
"%pM\n", bssid, ifsta->bssid);
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
- if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
+ if (found &&
+ ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
+ memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
int ret;
int search_freq;
@@ -2603,16 +2609,16 @@
memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
memcpy(ifsta->ssid, ssid, len);
ifsta->ssid_len = len;
- ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
}
+ ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
+
if (len)
ifsta->flags |= IEEE80211_STA_SSID_SET;
else
ifsta->flags &= ~IEEE80211_STA_SSID_SET;
- if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
- !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
+ if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
ifsta->ibss_join_req = jiffies;
ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
return ieee80211_sta_find_ibss(sdata, ifsta);
@@ -2632,36 +2638,18 @@
int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
{
struct ieee80211_if_sta *ifsta;
- int res;
- bool valid;
ifsta = &sdata->u.sta;
- valid = is_valid_ether_addr(bssid);
-
- if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
- if(valid)
- memcpy(ifsta->bssid, bssid, ETH_ALEN);
- else
- memset(ifsta->bssid, 0, ETH_ALEN);
- res = 0;
- /*
- * Hack! See also ieee80211_sta_set_ssid.
- */
- if (netif_running(sdata->dev))
- res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
- if (res) {
- printk(KERN_DEBUG "%s: Failed to config new BSSID to "
- "the low-level driver\n", sdata->dev->name);
- return res;
- }
- }
- if (valid)
+ if (is_valid_ether_addr(bssid)) {
+ memcpy(ifsta->bssid, bssid, ETH_ALEN);
ifsta->flags |= IEEE80211_STA_BSSID_SET;
- else
+ } else {
+ memset(ifsta->bssid, 0, ETH_ALEN);
ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
+ }
- return 0;
+ return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
}
int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
--
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