mac80211: move dynamic PS timeout to hardware config
[linux-2.6.git] / net / mac80211 / mlme.c
index dee6448..7709e76 100644 (file)
@@ -14,7 +14,6 @@
 #include <linux/delay.h>
 #include <linux/if_ether.h>
 #include <linux/skbuff.h>
-#include <linux/netdevice.h>
 #include <linux/if_arp.h>
 #include <linux/wireless.h>
 #include <linux/random.h>
@@ -310,7 +309,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
                mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                                  IEEE80211_STYPE_ASSOC_REQ);
                mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
-               mgmt->u.reassoc_req.listen_interval =
+               mgmt->u.assoc_req.listen_interval =
                                cpu_to_le16(local->hw.conf.listen_interval);
        }
 
@@ -392,10 +391,17 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
        }
 
        /* wmm support is a must to HT */
+       /*
+        * IEEE802.11n does not allow TKIP/WEP as pairwise
+        * ciphers in HT mode. We still associate in non-ht
+        * mode (11a/b/g) if any one of these ciphers is
+        * configured as pairwise.
+        */
        if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
            sband->ht_cap.ht_supported &&
            (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
-           ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
+           ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
+           (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
                struct ieee80211_ht_info *ht_info =
                        (struct ieee80211_ht_info *)(ht_ie + 2);
                u16 cap = sband->ht_cap.cap;
@@ -569,6 +575,30 @@ static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
        }
 }
 
+static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
+{
+       u8 mask;
+       u8 index, indexn1, indexn2;
+       struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
+
+       aid &= 0x3fff;
+       index = aid / 8;
+       mask  = 1 << (aid & 7);
+
+       if (tim->bitmap_ctrl & 0x01)
+               *is_mc = true;
+
+       indexn1 = tim->bitmap_ctrl & 0xfe;
+       indexn2 = elems->tim_len + indexn1 - 4;
+
+       if (index < indexn1 || index > indexn2)
+               return false;
+
+       index -= indexn1;
+
+       return !!(tim->virtual_map[index] & mask);
+}
+
 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
                                           u16 capab, bool erp_valid, u8 erp)
 {
@@ -621,8 +651,8 @@ static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
        if (use_short_slot != bss_conf->use_short_slot) {
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
                if (net_ratelimit()) {
-                       printk(KERN_DEBUG "%s: switched to %s slot"
-                              " (BSSID=%s)\n",
+                       printk(KERN_DEBUG "%s: switched to %s slot time"
+                              " (BSSID=%pM)\n",
                               sdata->dev->name,
                               use_short_slot ? "short" : "long",
                               ifsta->bssid);
@@ -745,6 +775,20 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
        bss_info_changed |= BSS_CHANGED_BASIC_RATES;
        ieee80211_bss_info_change_notify(sdata, bss_info_changed);
 
+       if (local->powersave &&
+                       !(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
+               if (local->hw.conf.dynamic_ps_timeout > 0)
+                       mod_timer(&local->dynamic_ps_timer, jiffies +
+                                 msecs_to_jiffies(
+                                       local->hw.conf.dynamic_ps_timeout));
+               else {
+                       ieee80211_send_nullfunc(local, sdata, 1);
+                       conf->flags |= IEEE80211_CONF_PS;
+                       ieee80211_hw_config(local,
+                                           IEEE80211_CONF_CHANGE_PS);
+               }
+       }
+
        netif_tx_start_all_queues(sdata->dev);
        netif_carrier_on(sdata->dev);
 
@@ -803,13 +847,17 @@ static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
        mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
 }
 
+/*
+ * The disassoc 'reason' argument can be either our own reason
+ * if self disconnected or a reason code from the AP.
+ */
 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
                                   struct ieee80211_if_sta *ifsta, bool deauth,
                                   bool self_disconnected, u16 reason)
 {
        struct ieee80211_local *local = sdata->local;
        struct sta_info *sta;
-       u32 changed = 0;
+       u32 changed = 0, config_changed = 0;
 
        rcu_read_lock();
 
@@ -849,19 +897,38 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
        ieee80211_sta_send_apinfo(sdata, ifsta);
 
-       if (self_disconnected)
+       if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
                ifsta->state = IEEE80211_STA_MLME_DISABLED;
 
-       sta_info_unlink(&sta);
-
        rcu_read_unlock();
 
-       sta_info_destroy(sta);
+       /* channel(_type) changes are handled by ieee80211_hw_config */
+       local->oper_channel_type = NL80211_CHAN_NO_HT;
 
-       local->hw.conf.ht.enabled = false;
-       ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
+       del_timer_sync(&local->dynamic_ps_timer);
+       cancel_work_sync(&local->dynamic_ps_enable_work);
 
+       if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+               local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+               config_changed |= IEEE80211_CONF_CHANGE_PS;
+       }
+
+       ieee80211_hw_config(local, config_changed);
        ieee80211_bss_info_change_notify(sdata, changed);
+
+       rcu_read_lock();
+
+       sta = sta_info_get(local, ifsta->bssid);
+       if (!sta) {
+               rcu_read_unlock();
+               return;
+       }
+
+       sta_info_unlink(&sta);
+
+       rcu_read_unlock();
+
+       sta_info_destroy(sta);
 }
 
 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
@@ -1164,7 +1231,7 @@ static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
                                      IEEE80211_RETRY_AUTH_INTERVAL);
        }
 
-       ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
+       ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
 }
 
 
@@ -1552,8 +1619,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
                                    (unsigned long long) sta->sta.supp_rates[band]);
 #endif
                } else {
-                       ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
-                                              mgmt->sa, supp_rates);
+                       ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
                }
 
                rcu_read_unlock();
@@ -1564,6 +1630,13 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
        if (!bss)
                return;
 
+       if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
+           (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
+               struct ieee80211_channel_sw_ie *sw_elem =
+                       (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
+               ieee80211_process_chanswitch(sdata, sw_elem, bss);
+       }
+
        /* was just updated in ieee80211_bss_info_update */
        beacon_timestamp = bss->timestamp;
 
@@ -1579,6 +1652,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 
        /* check if we need to merge IBSS */
        if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
+           (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
            bss->capability & WLAN_CAPABILITY_IBSS &&
            bss->freq == local->oper_channel->center_freq &&
            elems->ssid_len == sdata->u.sta.ssid_len &&
@@ -1600,8 +1674,13 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
                         * e.g: at 1 MBit that means mactime is 192 usec earlier
                         * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
                         */
-                       int rate = local->hw.wiphy->bands[band]->
+                       int rate;
+                       if (rx_status->flag & RX_FLAG_HT) {
+                               rate = 65; /* TODO: HT rates */
+                       } else {
+                               rate = local->hw.wiphy->bands[band]->
                                        bitrates[rx_status->rate_idx].bitrate;
+                       }
                        rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
                } else if (local && local->ops && local->ops->get_tsf)
                        /* second best option: get current TSF */
@@ -1625,9 +1704,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
                               sdata->dev->name, mgmt->bssid);
 #endif
                        ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
-                       ieee80211_ibss_add_sta(sdata, NULL,
-                                              mgmt->bssid, mgmt->sa,
-                                              supp_rates);
+                       ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
                }
        }
 
@@ -1676,7 +1753,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
        struct ieee802_11_elems elems;
        struct ieee80211_local *local = sdata->local;
        u32 changed = 0;
-       bool erp_valid;
+       bool erp_valid, directed_tim, is_mc = false;
        u8 erp_value = 0;
 
        /* Process beacon from the current BSS */
@@ -1696,9 +1773,24 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
            memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
                return;
 
+       if (rx_status->freq != local->hw.conf.channel->center_freq)
+               return;
+
        ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
                                 elems.wmm_param_len);
 
+       if (!(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
+               directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
+
+               if (directed_tim || is_mc) {
+                       if (local->hw.conf.flags && IEEE80211_CONF_PS) {
+                               local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+                               ieee80211_hw_config(local,
+                                               IEEE80211_CONF_CHANGE_PS);
+                               ieee80211_send_nullfunc(local, sdata, 0);
+                       }
+               }
+       }
 
        if (elems.erp_info && elems.erp_info_len >= 1) {
                erp_valid = true;
@@ -1737,6 +1829,13 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
                                               ap_ht_cap_flags);
        }
 
+       if (elems.country_elem) {
+               /* Note we are only reviewing this on beacons
+                * for the BSSID we are associated to */
+               regulatory_hint_11d(local->hw.wiphy,
+                       elems.country_elem, elems.country_elem_len);
+       }
+
        ieee80211_bss_info_change_notify(sdata, changed);
 }
 
@@ -1744,8 +1843,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
                                        struct ieee80211_if_sta *ifsta,
                                        struct ieee80211_mgmt *mgmt,
-                                       size_t len,
-                                       struct ieee80211_rx_status *rx_status)
+                                       size_t len)
 {
        struct ieee80211_local *local = sdata->local;
        int tx_last_beacon;
@@ -1860,8 +1958,7 @@ static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 
        switch (fc & IEEE80211_FCTL_STYPE) {
        case IEEE80211_STYPE_PROBE_REQ:
-               ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
-                                           rx_status);
+               ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
                break;
        case IEEE80211_STYPE_PROBE_RESP:
                ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
@@ -1922,6 +2019,10 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
        if (ieee80211_sta_active_ibss(sdata))
                return;
 
+       if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
+           (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
+               return;
+
        printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
               "IBSS networks with same SSID (merge)\n", sdata->dev->name);
        ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
@@ -1992,7 +2093,7 @@ static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
                }
        }
 
-       if (hidden_ssid && ifsta->ssid_len == ssid_len)
+       if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
                return 1;
 
        if (ssid_len == 1 && ssid[0] == ' ')
@@ -2333,8 +2434,11 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
 
        ifsta = &sdata->u.sta;
        INIT_WORK(&ifsta->work, ieee80211_sta_work);
+       INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
        setup_timer(&ifsta->timer, ieee80211_sta_timer,
                    (unsigned long) sdata);
+       setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
+                   (unsigned long) sdata);
        skb_queue_head_init(&ifsta->skb_queue);
 
        ifsta->capab = WLAN_CAPABILITY_ESS;
@@ -2353,8 +2457,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
  * must be callable in atomic context.
  */
 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
-                                       struct sk_buff *skb, u8 *bssid,
-                                       u8 *addr, u64 supp_rates)
+                                       u8 *bssid,u8 *addr, u64 supp_rates)
 {
        struct ieee80211_local *local = sdata->local;
        struct sta_info *sta;
@@ -2462,11 +2565,16 @@ 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) {
-               memcpy(ifsta->bssid, bssid, ETH_ALEN);
+               if(valid)
+                       memcpy(ifsta->bssid, bssid, ETH_ALEN);
+               else
+                       memset(ifsta->bssid, 0, ETH_ALEN);
                res = 0;
                /*
                 * Hack! See also ieee80211_sta_set_ssid.
@@ -2480,7 +2588,7 @@ int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
                }
        }
 
-       if (is_valid_ether_addr(bssid))
+       if (valid)
                ifsta->flags |= IEEE80211_STA_BSSID_SET;
        else
                ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
@@ -2561,24 +2669,40 @@ void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
        rcu_read_unlock();
 }
 
-/* driver notification call */
-void ieee80211_notify_mac(struct ieee80211_hw *hw,
-                         enum ieee80211_notification_types  notif_type)
+void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
 {
-       struct ieee80211_local *local = hw_to_local(hw);
-       struct ieee80211_sub_if_data *sdata;
+       struct ieee80211_local *local =
+               container_of(work, struct ieee80211_local,
+                            dynamic_ps_disable_work);
 
-       switch (notif_type) {
-       case IEEE80211_NOTIFY_RE_ASSOC:
-               rcu_read_lock();
-               list_for_each_entry_rcu(sdata, &local->interfaces, list) {
-                       if (sdata->vif.type != NL80211_IFTYPE_STATION)
-                               continue;
-
-                       ieee80211_sta_req_auth(sdata, &sdata->u.sta);
-               }
-               rcu_read_unlock();
-               break;
+       if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+               local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+               ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
        }
+
+       ieee80211_wake_queues_by_reason(&local->hw,
+                                       IEEE80211_QUEUE_STOP_REASON_PS);
+}
+
+void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
+{
+       struct ieee80211_local *local =
+               container_of(work, struct ieee80211_local,
+                            dynamic_ps_enable_work);
+       struct ieee80211_sub_if_data *sdata = local->scan_sdata;
+
+       if (local->hw.conf.flags & IEEE80211_CONF_PS)
+               return;
+
+       ieee80211_send_nullfunc(local, sdata, 1);
+       local->hw.conf.flags |= IEEE80211_CONF_PS;
+
+       ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+}
+
+void ieee80211_dynamic_ps_timer(unsigned long data)
+{
+       struct ieee80211_local *local = (void *) data;
+
+       queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
 }
-EXPORT_SYMBOL(ieee80211_notify_mac);