mac80211: automatic IBSS channel selection

[linux-2.6] / net / mac80211 / mlme.c

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index acb04133a95dc699735fcb1932fe16a64b4d720a..5358420d8796e5612418d6d5fc2f60d2152d7a3e 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -551,6 +551,7 @@ static void ieee80211_set_associated(struct net_device *dev,
                        /* set timing information */
                        sdata->bss_conf.beacon_int = bss->beacon_int;
                        sdata->bss_conf.timestamp = bss->timestamp;
+                       sdata->bss_conf.dtim_period = bss->dtim_period;
 
                        changed |= ieee80211_handle_bss_capability(sdata, bss);
 
@@ -773,7 +774,8 @@ static void ieee80211_send_assoc(struct net_device *dev,
                mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
                                                   IEEE80211_STYPE_REASSOC_REQ);
                mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
-               mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
+               mgmt->u.reassoc_req.listen_interval =
+                               cpu_to_le16(local->hw.conf.listen_interval);
                memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
                       ETH_ALEN);
        } else {
@@ -781,7 +783,8 @@ static void ieee80211_send_assoc(struct net_device *dev,
                mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
                                                   IEEE80211_STYPE_ASSOC_REQ);
                mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
-               mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
+               mgmt->u.reassoc_req.listen_interval =
+                               cpu_to_le16(local->hw.conf.listen_interval);
        }
 
        /* SSID */
@@ -2688,6 +2691,16 @@ static void ieee80211_rx_bss_info(struct net_device *dev,
        bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
        bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
 
+       if (elems->tim) {
+               struct ieee80211_tim_ie *tim_ie =
+                       (struct ieee80211_tim_ie *)elems->tim;
+               bss->dtim_period = tim_ie->dtim_period;
+       }
+
+       /* set default value for buggy APs */
+       if (!elems->tim || bss->dtim_period == 0)
+               bss->dtim_period = 1;
+
        bss->supp_rates_len = 0;
        if (elems->supp_rates) {
                clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
@@ -3650,11 +3663,21 @@ 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,
-                                       local->hw.conf.channel->center_freq,
-                                       ifsta->ssid, ifsta->ssid_len))) {
+
+       if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
                int ret;
+               int search_freq;
+
+               if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
+                       search_freq = bss->freq;
+               else
+                       search_freq = local->hw.conf.channel->center_freq;
+
+               bss = ieee80211_rx_bss_get(dev, bssid, search_freq,
+                                          ifsta->ssid, ifsta->ssid_len);
+               if (!bss)
+                       goto dont_join;
+
                printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
                       " based on configured SSID\n",
                       dev->name, print_mac(mac, bssid));
@@ -3662,6 +3685,8 @@ static int ieee80211_sta_find_ibss(struct net_device *dev,
                ieee80211_rx_bss_put(local, bss);
                return ret;
        }
+
+dont_join:
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
        printk(KERN_DEBUG "   did not try to join ibss\n");
 #endif /* CONFIG_MAC80211_IBSS_DEBUG */