2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 static int max_nullfunc_tries = 2;
32 module_param(max_nullfunc_tries, int, 0644);
33 MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
36 static int max_probe_tries = 5;
37 module_param(max_probe_tries, int, 0644);
38 MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
49 #define IEEE80211_BEACON_LOSS_COUNT 7
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
55 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
61 static int probe_wait_ms = 500;
62 module_param(probe_wait_ms, int, 0644);
63 MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
72 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
78 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
80 #define TMR_RUNNING_TIMER 0
81 #define TMR_RUNNING_CHANSW 1
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
90 /* no action required */
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
101 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
103 lockdep_assert_held(&ifmgd->mtx);
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
116 static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
119 ASSERT_MGD_MTX(ifmgd);
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
126 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
135 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
139 if (unlikely(!sdata->u.mgd.associated))
142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
148 ifmgd->probe_send_count = 0;
151 static int ecw2cw(int ecw)
153 return (1 << ecw) - 1;
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
161 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
168 struct sta_info *sta;
172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
178 prev_chantype = sdata->vif.bss_conf.channel_type;
180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
207 channel_type = NL80211_CHAN_HT20;
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
211 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
212 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
214 if (!(local->hw.conf.channel->flags &
215 IEEE80211_CHAN_NO_HT40PLUS))
216 channel_type = NL80211_CHAN_HT40PLUS;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40MINUS))
221 channel_type = NL80211_CHAN_HT40MINUS;
227 if (local->tmp_channel)
228 local->tmp_channel_type = channel_type;
230 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type = NL80211_CHAN_HT20;
233 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
236 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
242 ieee80211_stop_queues_by_reason(&sdata->local->hw,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
245 /* flush out all packets */
248 drv_flush(local, false);
251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local, 0);
254 if (prev_chantype != channel_type) {
256 sta = sta_info_get(sdata, bssid);
258 rate_control_rate_update(local, sband, sta,
259 IEEE80211_RC_HT_CHANGED,
264 ieee80211_wake_queues_by_reason(&sdata->local->hw,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
268 ht_opmode = le16_to_cpu(hti->operation_mode);
270 /* if bss configuration changed store the new one */
271 if (sdata->ht_opmode_valid != enable_ht ||
272 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
273 prev_chantype != channel_type) {
274 changed |= BSS_CHANGED_HT;
275 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
276 sdata->ht_opmode_valid = enable_ht;
282 /* frame sending functions */
284 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
285 const u8 *bssid, u16 stype, u16 reason,
286 void *cookie, bool send_frame)
288 struct ieee80211_local *local = sdata->local;
289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
291 struct ieee80211_mgmt *mgmt;
293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
297 skb_reserve(skb, local->hw.extra_tx_headroom);
299 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
301 memcpy(mgmt->da, bssid, ETH_ALEN);
302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
306 /* u.deauth.reason_code == u.disassoc.reason_code */
307 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
309 if (stype == IEEE80211_STYPE_DEAUTH)
311 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
313 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
316 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
318 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
319 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
323 ieee80211_tx_skb(sdata, skb);
328 void ieee80211_send_pspoll(struct ieee80211_local *local,
329 struct ieee80211_sub_if_data *sdata)
331 struct ieee80211_pspoll *pspoll;
334 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
338 pspoll = (struct ieee80211_pspoll *) skb->data;
339 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
345 void ieee80211_send_nullfunc(struct ieee80211_local *local,
346 struct ieee80211_sub_if_data *sdata,
350 struct ieee80211_hdr_3addr *nullfunc;
351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
353 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
357 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
359 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
361 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
362 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
363 IEEE80211_STA_CONNECTION_POLL))
364 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
366 ieee80211_tx_skb(sdata, skb);
369 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
370 struct ieee80211_sub_if_data *sdata)
373 struct ieee80211_hdr *nullfunc;
376 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
379 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
383 skb_reserve(skb, local->hw.extra_tx_headroom);
385 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
386 memset(nullfunc, 0, 30);
387 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
388 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
389 nullfunc->frame_control = fc;
390 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
391 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
392 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
393 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
395 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
396 ieee80211_tx_skb(sdata, skb);
399 /* spectrum management related things */
400 static void ieee80211_chswitch_work(struct work_struct *work)
402 struct ieee80211_sub_if_data *sdata =
403 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
406 if (!ieee80211_sdata_running(sdata))
409 mutex_lock(&ifmgd->mtx);
410 if (!ifmgd->associated)
413 sdata->local->oper_channel = sdata->local->csa_channel;
414 if (!sdata->local->ops->channel_switch) {
415 /* call "hw_config" only if doing sw channel switch */
416 ieee80211_hw_config(sdata->local,
417 IEEE80211_CONF_CHANGE_CHANNEL);
419 /* update the device channel directly */
420 sdata->local->hw.conf.channel = sdata->local->oper_channel;
423 /* XXX: shouldn't really modify cfg80211-owned data! */
424 ifmgd->associated->channel = sdata->local->oper_channel;
426 ieee80211_wake_queues_by_reason(&sdata->local->hw,
427 IEEE80211_QUEUE_STOP_REASON_CSA);
429 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
430 mutex_unlock(&ifmgd->mtx);
433 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
435 struct ieee80211_sub_if_data *sdata;
436 struct ieee80211_if_managed *ifmgd;
438 sdata = vif_to_sdata(vif);
439 ifmgd = &sdata->u.mgd;
441 trace_api_chswitch_done(sdata, success);
444 * If the channel switch was not successful, stay
445 * around on the old channel. We currently lack
446 * good handling of this situation, possibly we
447 * should just drop the association.
449 sdata->local->csa_channel = sdata->local->oper_channel;
452 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
454 EXPORT_SYMBOL(ieee80211_chswitch_done);
456 static void ieee80211_chswitch_timer(unsigned long data)
458 struct ieee80211_sub_if_data *sdata =
459 (struct ieee80211_sub_if_data *) data;
460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
462 if (sdata->local->quiescing) {
463 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
467 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
470 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
471 struct ieee80211_channel_sw_ie *sw_elem,
472 struct ieee80211_bss *bss,
475 struct cfg80211_bss *cbss =
476 container_of((void *)bss, struct cfg80211_bss, priv);
477 struct ieee80211_channel *new_ch;
478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
479 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
480 cbss->channel->band);
482 ASSERT_MGD_MTX(ifmgd);
484 if (!ifmgd->associated)
487 if (sdata->local->scanning)
490 /* Disregard subsequent beacons if we are already running a timer
493 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
496 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
497 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
500 sdata->local->csa_channel = new_ch;
502 if (sdata->local->ops->channel_switch) {
503 /* use driver's channel switch callback */
504 struct ieee80211_channel_switch ch_switch;
505 memset(&ch_switch, 0, sizeof(ch_switch));
506 ch_switch.timestamp = timestamp;
508 ch_switch.block_tx = true;
509 ieee80211_stop_queues_by_reason(&sdata->local->hw,
510 IEEE80211_QUEUE_STOP_REASON_CSA);
512 ch_switch.channel = new_ch;
513 ch_switch.count = sw_elem->count;
514 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
515 drv_channel_switch(sdata->local, &ch_switch);
519 /* channel switch handled in software */
520 if (sw_elem->count <= 1) {
521 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
524 ieee80211_stop_queues_by_reason(&sdata->local->hw,
525 IEEE80211_QUEUE_STOP_REASON_CSA);
526 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
527 mod_timer(&ifmgd->chswitch_timer,
529 msecs_to_jiffies(sw_elem->count *
530 cbss->beacon_interval));
534 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
535 u16 capab_info, u8 *pwr_constr_elem,
536 u8 pwr_constr_elem_len)
538 struct ieee80211_conf *conf = &sdata->local->hw.conf;
540 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
543 /* Power constraint IE length should be 1 octet */
544 if (pwr_constr_elem_len != 1)
547 if ((*pwr_constr_elem <= conf->channel->max_power) &&
548 (*pwr_constr_elem != sdata->local->power_constr_level)) {
549 sdata->local->power_constr_level = *pwr_constr_elem;
550 ieee80211_hw_config(sdata->local, 0);
554 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
556 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
557 struct ieee80211_local *local = sdata->local;
558 struct ieee80211_conf *conf = &local->hw.conf;
560 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
561 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
562 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
564 local->disable_dynamic_ps = false;
565 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
567 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
569 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
571 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
572 struct ieee80211_local *local = sdata->local;
573 struct ieee80211_conf *conf = &local->hw.conf;
575 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
576 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
577 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
579 local->disable_dynamic_ps = true;
580 conf->dynamic_ps_timeout = 0;
581 del_timer_sync(&local->dynamic_ps_timer);
582 ieee80211_queue_work(&local->hw,
583 &local->dynamic_ps_enable_work);
585 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
588 static void ieee80211_enable_ps(struct ieee80211_local *local,
589 struct ieee80211_sub_if_data *sdata)
591 struct ieee80211_conf *conf = &local->hw.conf;
594 * If we are scanning right now then the parameters will
595 * take effect when scan finishes.
600 if (conf->dynamic_ps_timeout > 0 &&
601 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
602 mod_timer(&local->dynamic_ps_timer, jiffies +
603 msecs_to_jiffies(conf->dynamic_ps_timeout));
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
608 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
609 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
612 conf->flags |= IEEE80211_CONF_PS;
613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
617 static void ieee80211_change_ps(struct ieee80211_local *local)
619 struct ieee80211_conf *conf = &local->hw.conf;
621 if (local->ps_sdata) {
622 ieee80211_enable_ps(local, local->ps_sdata);
623 } else if (conf->flags & IEEE80211_CONF_PS) {
624 conf->flags &= ~IEEE80211_CONF_PS;
625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
626 del_timer_sync(&local->dynamic_ps_timer);
627 cancel_work_sync(&local->dynamic_ps_enable_work);
631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
633 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
634 struct sta_info *sta = NULL;
635 bool authorized = false;
643 if (!mgd->associated)
646 if (!mgd->associated->beacon_ies)
649 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
650 IEEE80211_STA_CONNECTION_POLL))
654 sta = sta_info_get(sdata, mgd->bssid);
656 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
662 /* need to hold RTNL or interface lock */
663 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
665 struct ieee80211_sub_if_data *sdata, *found = NULL;
669 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
670 local->ps_sdata = NULL;
674 if (!list_empty(&local->work_list)) {
675 local->ps_sdata = NULL;
679 list_for_each_entry(sdata, &local->interfaces, list) {
680 if (!ieee80211_sdata_running(sdata))
682 if (sdata->vif.type == NL80211_IFTYPE_AP) {
683 /* If an AP vif is found, then disable PS
684 * by setting the count to zero thereby setting
690 if (sdata->vif.type != NL80211_IFTYPE_STATION)
696 if (count == 1 && ieee80211_powersave_allowed(found)) {
697 struct ieee80211_conf *conf = &local->hw.conf;
701 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
703 beaconint_us = ieee80211_tu_to_usec(
704 found->vif.bss_conf.beacon_int);
706 timeout = local->dynamic_ps_forced_timeout;
709 * Go to full PSM if the user configures a very low
710 * latency requirement.
711 * The 2000 second value is there for compatibility
712 * until the PM_QOS_NETWORK_LATENCY is configured
715 if (latency > (1900 * USEC_PER_MSEC) &&
716 latency != (2000 * USEC_PER_SEC))
721 local->dynamic_ps_user_timeout = timeout;
722 if (!local->disable_dynamic_ps)
723 conf->dynamic_ps_timeout =
724 local->dynamic_ps_user_timeout;
726 if (beaconint_us > latency) {
727 local->ps_sdata = NULL;
729 struct ieee80211_bss *bss;
733 bss = (void *)found->u.mgd.associated->priv;
734 dtimper = bss->dtim_period;
736 /* If the TIM IE is invalid, pretend the value is 1 */
739 else if (dtimper > 1)
740 maxslp = min_t(int, dtimper,
741 latency / beaconint_us);
743 local->hw.conf.max_sleep_period = maxslp;
744 local->hw.conf.ps_dtim_period = dtimper;
745 local->ps_sdata = found;
748 local->ps_sdata = NULL;
752 ieee80211_change_ps(local);
755 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
757 struct ieee80211_local *local =
758 container_of(work, struct ieee80211_local,
759 dynamic_ps_disable_work);
761 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
762 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
763 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
766 ieee80211_wake_queues_by_reason(&local->hw,
767 IEEE80211_QUEUE_STOP_REASON_PS);
770 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
772 struct ieee80211_local *local =
773 container_of(work, struct ieee80211_local,
774 dynamic_ps_enable_work);
775 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
776 struct ieee80211_if_managed *ifmgd;
780 /* can only happen when PS was just disabled anyway */
784 ifmgd = &sdata->u.mgd;
786 if (local->hw.conf.flags & IEEE80211_CONF_PS)
789 if (!local->disable_dynamic_ps &&
790 local->hw.conf.dynamic_ps_timeout > 0) {
791 /* don't enter PS if TX frames are pending */
792 if (drv_tx_frames_pending(local)) {
793 mod_timer(&local->dynamic_ps_timer, jiffies +
795 local->hw.conf.dynamic_ps_timeout));
800 * transmission can be stopped by others which leads to
801 * dynamic_ps_timer expiry. Postpone the ps timer if it
802 * is not the actual idle state.
804 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
805 for (q = 0; q < local->hw.queues; q++) {
806 if (local->queue_stop_reasons[q]) {
807 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
809 mod_timer(&local->dynamic_ps_timer, jiffies +
811 local->hw.conf.dynamic_ps_timeout));
815 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
818 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
819 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
820 netif_tx_stop_all_queues(sdata->dev);
822 if (drv_tx_frames_pending(local))
823 mod_timer(&local->dynamic_ps_timer, jiffies +
825 local->hw.conf.dynamic_ps_timeout));
827 ieee80211_send_nullfunc(local, sdata, 1);
828 /* Flush to get the tx status of nullfunc frame */
829 drv_flush(local, false);
833 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
834 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
835 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
836 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
837 local->hw.conf.flags |= IEEE80211_CONF_PS;
838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
841 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
842 netif_tx_wake_all_queues(sdata->dev);
845 void ieee80211_dynamic_ps_timer(unsigned long data)
847 struct ieee80211_local *local = (void *) data;
849 if (local->quiescing || local->suspended)
852 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
856 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
857 struct ieee80211_sub_if_data *sdata,
858 u8 *wmm_param, size_t wmm_param_len)
860 struct ieee80211_tx_queue_params params;
861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
864 u8 *pos, uapsd_queues = 0;
866 if (!local->ops->conf_tx)
869 if (local->hw.queues < 4)
875 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
878 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
879 uapsd_queues = local->uapsd_queues;
881 count = wmm_param[6] & 0x0f;
882 if (count == ifmgd->wmm_last_param_set)
884 ifmgd->wmm_last_param_set = count;
887 left = wmm_param_len - 8;
889 memset(¶ms, 0, sizeof(params));
892 for (; left >= 4; left -= 4, pos += 4) {
893 int aci = (pos[0] >> 5) & 0x03;
894 int acm = (pos[0] >> 4) & 0x01;
902 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
903 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
909 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
910 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
916 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
917 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
924 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
925 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
930 params.aifs = pos[0] & 0x0f;
931 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
932 params.cw_min = ecw2cw(pos[1] & 0x0f);
933 params.txop = get_unaligned_le16(pos + 2);
934 params.uapsd = uapsd;
936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
937 wiphy_debug(local->hw.wiphy,
938 "WMM queue=%d aci=%d acm=%d aifs=%d "
939 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
941 params.aifs, params.cw_min, params.cw_max,
942 params.txop, params.uapsd);
944 sdata->tx_conf[queue] = params;
945 if (drv_conf_tx(local, sdata, queue, ¶ms))
946 wiphy_debug(local->hw.wiphy,
947 "failed to set TX queue parameters for queue %d\n",
951 /* enable WMM or activate new settings */
952 sdata->vif.bss_conf.qos = true;
953 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
956 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
957 u16 capab, bool erp_valid, u8 erp)
959 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
962 bool use_short_preamble;
966 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
967 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
969 use_protection = false;
970 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
973 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
974 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
975 use_short_slot = true;
977 if (use_protection != bss_conf->use_cts_prot) {
978 bss_conf->use_cts_prot = use_protection;
979 changed |= BSS_CHANGED_ERP_CTS_PROT;
982 if (use_short_preamble != bss_conf->use_short_preamble) {
983 bss_conf->use_short_preamble = use_short_preamble;
984 changed |= BSS_CHANGED_ERP_PREAMBLE;
987 if (use_short_slot != bss_conf->use_short_slot) {
988 bss_conf->use_short_slot = use_short_slot;
989 changed |= BSS_CHANGED_ERP_SLOT;
995 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
996 struct cfg80211_bss *cbss,
997 u32 bss_info_changed)
999 struct ieee80211_bss *bss = (void *)cbss->priv;
1000 struct ieee80211_local *local = sdata->local;
1001 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1003 bss_info_changed |= BSS_CHANGED_ASSOC;
1004 /* set timing information */
1005 bss_conf->beacon_int = cbss->beacon_interval;
1006 bss_conf->timestamp = cbss->tsf;
1008 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1009 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1010 cbss->capability, bss->has_erp_value, bss->erp_value);
1012 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1013 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1015 sdata->u.mgd.associated = cbss;
1016 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1018 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1020 /* just to be sure */
1021 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1022 IEEE80211_STA_BEACON_POLL);
1024 ieee80211_led_assoc(local, 1);
1026 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1027 bss_conf->dtim_period = bss->dtim_period;
1029 bss_conf->dtim_period = 0;
1031 bss_conf->assoc = 1;
1033 * For now just always ask the driver to update the basic rateset
1034 * when we have associated, we aren't checking whether it actually
1037 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1039 /* And the BSSID changed - we're associated now */
1040 bss_info_changed |= BSS_CHANGED_BSSID;
1042 /* Tell the driver to monitor connection quality (if supported) */
1043 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
1044 bss_conf->cqm_rssi_thold)
1045 bss_info_changed |= BSS_CHANGED_CQM;
1047 /* Enable ARP filtering */
1048 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1049 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1050 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1053 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1055 mutex_lock(&local->iflist_mtx);
1056 ieee80211_recalc_ps(local, -1);
1057 ieee80211_recalc_smps(local);
1058 mutex_unlock(&local->iflist_mtx);
1060 netif_tx_start_all_queues(sdata->dev);
1061 netif_carrier_on(sdata->dev);
1064 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1065 bool remove_sta, bool tx)
1067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1068 struct ieee80211_local *local = sdata->local;
1069 struct sta_info *sta;
1070 u32 changed = 0, config_changed = 0;
1073 ASSERT_MGD_MTX(ifmgd);
1075 if (WARN_ON(!ifmgd->associated))
1078 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1080 ifmgd->associated = NULL;
1081 memset(ifmgd->bssid, 0, ETH_ALEN);
1084 * we need to commit the associated = NULL change because the
1085 * scan code uses that to determine whether this iface should
1086 * go to/wake up from powersave or not -- and could otherwise
1087 * wake the queues erroneously.
1092 * Thus, we can only afterwards stop the queues -- to account
1093 * for the case where another CPU is finishing a scan at this
1094 * time -- we don't want the scan code to enable queues.
1097 netif_tx_stop_all_queues(sdata->dev);
1098 netif_carrier_off(sdata->dev);
1100 mutex_lock(&local->sta_mtx);
1101 sta = sta_info_get(sdata, bssid);
1103 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1104 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1106 mutex_unlock(&local->sta_mtx);
1108 changed |= ieee80211_reset_erp_info(sdata);
1110 ieee80211_led_assoc(local, 0);
1111 changed |= BSS_CHANGED_ASSOC;
1112 sdata->vif.bss_conf.assoc = false;
1114 ieee80211_set_wmm_default(sdata);
1116 /* channel(_type) changes are handled by ieee80211_hw_config */
1117 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1119 /* on the next assoc, re-program HT parameters */
1120 sdata->ht_opmode_valid = false;
1122 local->power_constr_level = 0;
1124 del_timer_sync(&local->dynamic_ps_timer);
1125 cancel_work_sync(&local->dynamic_ps_enable_work);
1127 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1128 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1129 config_changed |= IEEE80211_CONF_CHANGE_PS;
1131 local->ps_sdata = NULL;
1133 ieee80211_hw_config(local, config_changed);
1135 /* Disable ARP filtering */
1136 if (sdata->vif.bss_conf.arp_filter_enabled) {
1137 sdata->vif.bss_conf.arp_filter_enabled = false;
1138 changed |= BSS_CHANGED_ARP_FILTER;
1141 /* The BSSID (not really interesting) and HT changed */
1142 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1143 ieee80211_bss_info_change_notify(sdata, changed);
1145 /* remove AP and TDLS peers */
1147 sta_info_flush(local, sdata);
1149 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1150 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1151 del_timer_sync(&sdata->u.mgd.timer);
1152 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1155 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1156 struct ieee80211_hdr *hdr)
1159 * We can postpone the mgd.timer whenever receiving unicast frames
1160 * from AP because we know that the connection is working both ways
1161 * at that time. But multicast frames (and hence also beacons) must
1162 * be ignored here, because we need to trigger the timer during
1163 * data idle periods for sending the periodic probe request to the
1164 * AP we're connected to.
1166 if (is_multicast_ether_addr(hdr->addr1))
1169 ieee80211_sta_reset_conn_monitor(sdata);
1172 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1176 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1177 IEEE80211_STA_CONNECTION_POLL)))
1180 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1181 IEEE80211_STA_BEACON_POLL);
1182 mutex_lock(&sdata->local->iflist_mtx);
1183 ieee80211_recalc_ps(sdata->local, -1);
1184 mutex_unlock(&sdata->local->iflist_mtx);
1186 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1190 * We've received a probe response, but are not sure whether
1191 * we have or will be receiving any beacons or data, so let's
1192 * schedule the timers again, just in case.
1194 ieee80211_sta_reset_beacon_monitor(sdata);
1196 mod_timer(&ifmgd->conn_mon_timer,
1197 round_jiffies_up(jiffies +
1198 IEEE80211_CONNECTION_IDLE_TIME));
1201 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1202 struct ieee80211_hdr *hdr, bool ack)
1204 if (!ieee80211_is_data(hdr->frame_control))
1208 ieee80211_sta_reset_conn_monitor(sdata);
1210 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1211 sdata->u.mgd.probe_send_count > 0) {
1213 sdata->u.mgd.probe_send_count = 0;
1215 sdata->u.mgd.nullfunc_failed = true;
1216 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1220 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1224 u8 *dst = ifmgd->associated->bssid;
1225 u8 unicast_limit = max(1, max_probe_tries - 3);
1228 * Try sending broadcast probe requests for the last three
1229 * probe requests after the first ones failed since some
1230 * buggy APs only support broadcast probe requests.
1232 if (ifmgd->probe_send_count >= unicast_limit)
1236 * When the hardware reports an accurate Tx ACK status, it's
1237 * better to send a nullfunc frame instead of a probe request,
1238 * as it will kick us off the AP quickly if we aren't associated
1239 * anymore. The timeout will be reset if the frame is ACKed by
1242 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1243 ifmgd->nullfunc_failed = false;
1244 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1246 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1247 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1248 (u32) -1, true, false);
1251 ifmgd->probe_send_count++;
1252 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1253 run_again(ifmgd, ifmgd->probe_timeout);
1256 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1259 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1260 bool already = false;
1262 if (!ieee80211_sdata_running(sdata))
1265 if (sdata->local->scanning)
1268 if (sdata->local->tmp_channel)
1271 mutex_lock(&ifmgd->mtx);
1273 if (!ifmgd->associated)
1276 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1277 if (beacon && net_ratelimit())
1278 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1279 "- sending probe request\n", sdata->name);
1283 * The driver/our work has already reported this event or the
1284 * connection monitoring has kicked in and we have already sent
1285 * a probe request. Or maybe the AP died and the driver keeps
1286 * reporting until we disassociate...
1288 * In either case we have to ignore the current call to this
1289 * function (except for setting the correct probe reason bit)
1290 * because otherwise we would reset the timer every time and
1291 * never check whether we received a probe response!
1293 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1294 IEEE80211_STA_CONNECTION_POLL))
1298 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1300 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1305 mutex_lock(&sdata->local->iflist_mtx);
1306 ieee80211_recalc_ps(sdata->local, -1);
1307 mutex_unlock(&sdata->local->iflist_mtx);
1309 ifmgd->probe_send_count = 0;
1310 ieee80211_mgd_probe_ap_send(sdata);
1312 mutex_unlock(&ifmgd->mtx);
1315 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1316 struct ieee80211_vif *vif)
1318 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1320 struct sk_buff *skb;
1323 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1326 ASSERT_MGD_MTX(ifmgd);
1328 if (!ifmgd->associated)
1331 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1332 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1333 (u32) -1, ssid + 2, ssid[1],
1338 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1340 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1343 struct ieee80211_local *local = sdata->local;
1346 mutex_lock(&ifmgd->mtx);
1347 if (!ifmgd->associated) {
1348 mutex_unlock(&ifmgd->mtx);
1352 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1354 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1355 sdata->name, bssid);
1357 ieee80211_set_disassoc(sdata, true, true);
1358 mutex_unlock(&ifmgd->mtx);
1360 mutex_lock(&local->mtx);
1361 ieee80211_recalc_idle(local);
1362 mutex_unlock(&local->mtx);
1364 * must be outside lock due to cfg80211,
1365 * but that's not a problem.
1367 ieee80211_send_deauth_disassoc(sdata, bssid,
1368 IEEE80211_STYPE_DEAUTH,
1369 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1373 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1375 struct ieee80211_sub_if_data *sdata =
1376 container_of(work, struct ieee80211_sub_if_data,
1377 u.mgd.beacon_connection_loss_work);
1379 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1380 __ieee80211_connection_loss(sdata);
1382 ieee80211_mgd_probe_ap(sdata, true);
1385 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1388 struct ieee80211_hw *hw = &sdata->local->hw;
1390 trace_api_beacon_loss(sdata);
1392 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1393 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1395 EXPORT_SYMBOL(ieee80211_beacon_loss);
1397 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1400 struct ieee80211_hw *hw = &sdata->local->hw;
1402 trace_api_connection_loss(sdata);
1404 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1405 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1407 EXPORT_SYMBOL(ieee80211_connection_loss);
1410 static enum rx_mgmt_action __must_check
1411 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgmt *mgmt, size_t len)
1414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1415 const u8 *bssid = NULL;
1419 return RX_MGMT_NONE;
1421 ASSERT_MGD_MTX(ifmgd);
1423 bssid = ifmgd->associated->bssid;
1425 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1427 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1428 sdata->name, bssid, reason_code);
1430 ieee80211_set_disassoc(sdata, true, false);
1431 mutex_lock(&sdata->local->mtx);
1432 ieee80211_recalc_idle(sdata->local);
1433 mutex_unlock(&sdata->local->mtx);
1435 return RX_MGMT_CFG80211_DEAUTH;
1439 static enum rx_mgmt_action __must_check
1440 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1441 struct ieee80211_mgmt *mgmt, size_t len)
1443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1447 return RX_MGMT_NONE;
1449 ASSERT_MGD_MTX(ifmgd);
1451 if (WARN_ON(!ifmgd->associated))
1452 return RX_MGMT_NONE;
1454 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1455 return RX_MGMT_NONE;
1457 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1459 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1460 sdata->name, mgmt->sa, reason_code);
1462 ieee80211_set_disassoc(sdata, true, false);
1463 mutex_lock(&sdata->local->mtx);
1464 ieee80211_recalc_idle(sdata->local);
1465 mutex_unlock(&sdata->local->mtx);
1466 return RX_MGMT_CFG80211_DISASSOC;
1470 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1471 struct ieee80211_mgmt *mgmt, size_t len)
1473 struct ieee80211_sub_if_data *sdata = wk->sdata;
1474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1475 struct ieee80211_local *local = sdata->local;
1476 struct ieee80211_supported_band *sband;
1477 struct sta_info *sta;
1478 struct cfg80211_bss *cbss = wk->assoc.bss;
1480 u32 rates, basic_rates;
1481 u16 capab_info, aid;
1482 struct ieee802_11_elems elems;
1483 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1486 bool have_higher_than_11mbit = false;
1487 u16 ap_ht_cap_flags;
1488 int min_rate = INT_MAX, min_rate_index = -1;
1490 /* AssocResp and ReassocResp have identical structure */
1492 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1493 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1495 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1497 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1499 aid &= ~(BIT(15) | BIT(14));
1501 ifmgd->broken_ap = false;
1503 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1505 "%s: invalid AID value %d (out of range), turn off PS\n",
1508 ifmgd->broken_ap = true;
1511 pos = mgmt->u.assoc_resp.variable;
1512 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1514 if (!elems.supp_rates) {
1515 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1522 mutex_lock(&sdata->local->sta_mtx);
1524 * station info was already allocated and inserted before
1525 * the association and should be available to us
1527 sta = sta_info_get_rx(sdata, cbss->bssid);
1528 if (WARN_ON(!sta)) {
1529 mutex_unlock(&sdata->local->sta_mtx);
1533 set_sta_flag(sta, WLAN_STA_AUTH);
1534 set_sta_flag(sta, WLAN_STA_ASSOC);
1535 set_sta_flag(sta, WLAN_STA_ASSOC_AP);
1536 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1537 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
1541 sband = local->hw.wiphy->bands[wk->chan->band];
1543 for (i = 0; i < elems.supp_rates_len; i++) {
1544 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1545 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1548 have_higher_than_11mbit = true;
1550 for (j = 0; j < sband->n_bitrates; j++) {
1551 if (sband->bitrates[j].bitrate == rate) {
1554 basic_rates |= BIT(j);
1555 if (rate < min_rate) {
1564 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1565 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1566 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1569 have_higher_than_11mbit = true;
1571 for (j = 0; j < sband->n_bitrates; j++) {
1572 if (sband->bitrates[j].bitrate == rate) {
1575 basic_rates |= BIT(j);
1576 if (rate < min_rate) {
1586 * some buggy APs don't advertise basic_rates. use the lowest
1587 * supported rate instead.
1589 if (unlikely(!basic_rates) && min_rate_index >= 0) {
1590 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
1591 "Using min supported rate instead.\n", sdata->name);
1592 basic_rates = BIT(min_rate_index);
1595 sta->sta.supp_rates[wk->chan->band] = rates;
1596 sdata->vif.bss_conf.basic_rates = basic_rates;
1598 /* cf. IEEE 802.11 9.2.12 */
1599 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
1600 have_higher_than_11mbit)
1601 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1603 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1605 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1606 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1607 elems.ht_cap_elem, &sta->sta.ht_cap);
1609 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1611 rate_control_rate_init(sta);
1613 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1614 set_sta_flag(sta, WLAN_STA_MFP);
1616 if (elems.wmm_param)
1617 set_sta_flag(sta, WLAN_STA_WME);
1619 /* sta_info_reinsert will also unlock the mutex lock */
1620 err = sta_info_reinsert(sta);
1623 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1624 " the AP (error %d)\n", sdata->name, err);
1629 * Always handle WMM once after association regardless
1630 * of the first value the AP uses. Setting -1 here has
1631 * that effect because the AP values is an unsigned
1634 ifmgd->wmm_last_param_set = -1;
1636 if (elems.wmm_param)
1637 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1638 elems.wmm_param_len);
1640 ieee80211_set_wmm_default(sdata);
1642 local->oper_channel = wk->chan;
1644 if (elems.ht_info_elem && elems.wmm_param &&
1645 (sdata->local->hw.queues >= 4) &&
1646 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1647 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1648 cbss->bssid, ap_ht_cap_flags,
1651 /* set AID and assoc capability,
1652 * ieee80211_set_associated() will tell the driver */
1653 bss_conf->aid = aid;
1654 bss_conf->assoc_capability = capab_info;
1655 ieee80211_set_associated(sdata, cbss, changed);
1658 * If we're using 4-addr mode, let the AP know that we're
1659 * doing so, so that it can create the STA VLAN on its side
1661 if (ifmgd->use_4addr)
1662 ieee80211_send_4addr_nullfunc(local, sdata);
1665 * Start timer to probe the connection to the AP now.
1666 * Also start the timer that will detect beacon loss.
1668 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1669 ieee80211_sta_reset_beacon_monitor(sdata);
1675 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1676 struct ieee80211_mgmt *mgmt,
1678 struct ieee80211_rx_status *rx_status,
1679 struct ieee802_11_elems *elems,
1682 struct ieee80211_local *local = sdata->local;
1684 struct ieee80211_bss *bss;
1685 struct ieee80211_channel *channel;
1686 bool need_ps = false;
1688 if (sdata->u.mgd.associated) {
1689 bss = (void *)sdata->u.mgd.associated->priv;
1690 /* not previously set so we may need to recalc */
1691 need_ps = !bss->dtim_period;
1694 if (elems->ds_params && elems->ds_params_len == 1)
1695 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1698 freq = rx_status->freq;
1700 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1702 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1705 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1708 ieee80211_rx_bss_put(local, bss);
1710 if (!sdata->u.mgd.associated)
1714 mutex_lock(&local->iflist_mtx);
1715 ieee80211_recalc_ps(local, -1);
1716 mutex_unlock(&local->iflist_mtx);
1719 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1720 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1722 struct ieee80211_channel_sw_ie *sw_elem =
1723 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1724 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1725 bss, rx_status->mactime);
1730 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1731 struct sk_buff *skb)
1733 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1734 struct ieee80211_if_managed *ifmgd;
1735 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1736 size_t baselen, len = skb->len;
1737 struct ieee802_11_elems elems;
1739 ifmgd = &sdata->u.mgd;
1741 ASSERT_MGD_MTX(ifmgd);
1743 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1744 return; /* ignore ProbeResp to foreign address */
1746 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1750 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1753 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1755 if (ifmgd->associated &&
1756 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1757 ieee80211_reset_ap_probe(sdata);
1761 * This is the canonical list of information elements we care about,
1762 * the filter code also gives us all changes to the Microsoft OUI
1763 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1765 * We implement beacon filtering in software since that means we can
1766 * avoid processing the frame here and in cfg80211, and userspace
1767 * will not be able to tell whether the hardware supports it or not.
1769 * XXX: This list needs to be dynamic -- userspace needs to be able to
1770 * add items it requires. It also needs to be able to tell us to
1771 * look out for other vendor IEs.
1773 static const u64 care_about_ies =
1774 (1ULL << WLAN_EID_COUNTRY) |
1775 (1ULL << WLAN_EID_ERP_INFO) |
1776 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1777 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1778 (1ULL << WLAN_EID_HT_CAPABILITY) |
1779 (1ULL << WLAN_EID_HT_INFORMATION);
1781 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1782 struct ieee80211_mgmt *mgmt,
1784 struct ieee80211_rx_status *rx_status)
1786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1787 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1789 struct ieee802_11_elems elems;
1790 struct ieee80211_local *local = sdata->local;
1792 bool erp_valid, directed_tim = false;
1797 ASSERT_MGD_MTX(ifmgd);
1799 /* Process beacon from the current BSS */
1800 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1804 if (rx_status->freq != local->hw.conf.channel->center_freq)
1808 * We might have received a number of frames, among them a
1809 * disassoc frame and a beacon...
1811 if (!ifmgd->associated)
1814 bssid = ifmgd->associated->bssid;
1817 * And in theory even frames from a different AP we were just
1818 * associated to a split-second ago!
1820 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1823 /* Track average RSSI from the Beacon frames of the current AP */
1824 ifmgd->last_beacon_signal = rx_status->signal;
1825 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1826 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1827 ifmgd->ave_beacon_signal = rx_status->signal * 16;
1828 ifmgd->last_cqm_event_signal = 0;
1829 ifmgd->count_beacon_signal = 1;
1830 ifmgd->last_ave_beacon_signal = 0;
1832 ifmgd->ave_beacon_signal =
1833 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1834 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1835 ifmgd->ave_beacon_signal) / 16;
1836 ifmgd->count_beacon_signal++;
1839 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1840 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1841 int sig = ifmgd->ave_beacon_signal;
1842 int last_sig = ifmgd->last_ave_beacon_signal;
1845 * if signal crosses either of the boundaries, invoke callback
1846 * with appropriate parameters
1848 if (sig > ifmgd->rssi_max_thold &&
1849 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1850 ifmgd->last_ave_beacon_signal = sig;
1851 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1852 } else if (sig < ifmgd->rssi_min_thold &&
1853 (last_sig >= ifmgd->rssi_max_thold ||
1855 ifmgd->last_ave_beacon_signal = sig;
1856 drv_rssi_callback(local, RSSI_EVENT_LOW);
1860 if (bss_conf->cqm_rssi_thold &&
1861 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
1862 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1863 int sig = ifmgd->ave_beacon_signal / 16;
1864 int last_event = ifmgd->last_cqm_event_signal;
1865 int thold = bss_conf->cqm_rssi_thold;
1866 int hyst = bss_conf->cqm_rssi_hyst;
1868 (last_event == 0 || sig < last_event - hyst)) {
1869 ifmgd->last_cqm_event_signal = sig;
1870 ieee80211_cqm_rssi_notify(
1872 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1874 } else if (sig > thold &&
1875 (last_event == 0 || sig > last_event + hyst)) {
1876 ifmgd->last_cqm_event_signal = sig;
1877 ieee80211_cqm_rssi_notify(
1879 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1884 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1885 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1886 if (net_ratelimit()) {
1887 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1888 "to a received beacon\n", sdata->name);
1891 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1892 mutex_lock(&local->iflist_mtx);
1893 ieee80211_recalc_ps(local, -1);
1894 mutex_unlock(&local->iflist_mtx);
1898 * Push the beacon loss detection into the future since
1899 * we are processing a beacon from the AP just now.
1901 ieee80211_sta_reset_beacon_monitor(sdata);
1903 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1904 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1905 len - baselen, &elems,
1906 care_about_ies, ncrc);
1908 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1909 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1912 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
1913 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1916 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1917 elems.wmm_param_len);
1920 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1922 if (local->hw.conf.dynamic_ps_timeout > 0) {
1923 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1924 ieee80211_hw_config(local,
1925 IEEE80211_CONF_CHANGE_PS);
1926 ieee80211_send_nullfunc(local, sdata, 0);
1928 local->pspolling = true;
1931 * Here is assumed that the driver will be
1932 * able to send ps-poll frame and receive a
1933 * response even though power save mode is
1934 * enabled, but some drivers might require
1935 * to disable power save here. This needs
1936 * to be investigated.
1938 ieee80211_send_pspoll(local, sdata);
1943 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
1945 ifmgd->beacon_crc = ncrc;
1946 ifmgd->beacon_crc_valid = true;
1948 if (elems.erp_info && elems.erp_info_len >= 1) {
1950 erp_value = elems.erp_info[0];
1954 changed |= ieee80211_handle_bss_capability(sdata,
1955 le16_to_cpu(mgmt->u.beacon.capab_info),
1956 erp_valid, erp_value);
1959 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1960 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1961 struct sta_info *sta;
1962 struct ieee80211_supported_band *sband;
1963 u16 ap_ht_cap_flags;
1967 sta = sta_info_get(sdata, bssid);
1968 if (WARN_ON(!sta)) {
1973 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1975 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1976 elems.ht_cap_elem, &sta->sta.ht_cap);
1978 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1982 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1983 bssid, ap_ht_cap_flags, true);
1986 /* Note: country IE parsing is done for us by cfg80211 */
1987 if (elems.country_elem) {
1988 /* TODO: IBSS also needs this */
1989 if (elems.pwr_constr_elem)
1990 ieee80211_handle_pwr_constr(sdata,
1991 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1992 elems.pwr_constr_elem,
1993 elems.pwr_constr_elem_len);
1996 ieee80211_bss_info_change_notify(sdata, changed);
1999 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2000 struct sk_buff *skb)
2002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2003 struct ieee80211_rx_status *rx_status;
2004 struct ieee80211_mgmt *mgmt;
2005 enum rx_mgmt_action rma = RX_MGMT_NONE;
2008 rx_status = (struct ieee80211_rx_status *) skb->cb;
2009 mgmt = (struct ieee80211_mgmt *) skb->data;
2010 fc = le16_to_cpu(mgmt->frame_control);
2012 mutex_lock(&ifmgd->mtx);
2014 if (ifmgd->associated &&
2015 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
2016 switch (fc & IEEE80211_FCTL_STYPE) {
2017 case IEEE80211_STYPE_BEACON:
2018 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2021 case IEEE80211_STYPE_PROBE_RESP:
2022 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2024 case IEEE80211_STYPE_DEAUTH:
2025 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2027 case IEEE80211_STYPE_DISASSOC:
2028 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2030 case IEEE80211_STYPE_ACTION:
2031 switch (mgmt->u.action.category) {
2032 case WLAN_CATEGORY_SPECTRUM_MGMT:
2033 ieee80211_sta_process_chanswitch(sdata,
2034 &mgmt->u.action.u.chan_switch.sw_elem,
2035 (void *)ifmgd->associated->priv,
2036 rx_status->mactime);
2040 mutex_unlock(&ifmgd->mtx);
2046 case RX_MGMT_CFG80211_DEAUTH:
2047 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2049 case RX_MGMT_CFG80211_DISASSOC:
2050 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2053 WARN(1, "unexpected: %d", rma);
2058 mutex_unlock(&ifmgd->mtx);
2060 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2061 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2062 struct ieee80211_local *local = sdata->local;
2063 struct ieee80211_work *wk;
2065 mutex_lock(&local->mtx);
2066 list_for_each_entry(wk, &local->work_list, list) {
2067 if (wk->sdata != sdata)
2070 if (wk->type != IEEE80211_WORK_ASSOC &&
2071 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2074 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2076 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2080 * Printing the message only here means we can't
2081 * spuriously print it, but it also means that it
2082 * won't be printed when the frame comes in before
2083 * we even tried to associate or in similar cases.
2085 * Ultimately, I suspect cfg80211 should print the
2089 "%s: deauthenticated from %pM (Reason: %u)\n",
2090 sdata->name, mgmt->bssid,
2091 le16_to_cpu(mgmt->u.deauth.reason_code));
2093 list_del_rcu(&wk->list);
2097 mutex_unlock(&local->mtx);
2099 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2103 static void ieee80211_sta_timer(unsigned long data)
2105 struct ieee80211_sub_if_data *sdata =
2106 (struct ieee80211_sub_if_data *) data;
2107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2108 struct ieee80211_local *local = sdata->local;
2110 if (local->quiescing) {
2111 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2115 ieee80211_queue_work(&local->hw, &sdata->work);
2118 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2119 u8 *bssid, u8 reason)
2121 struct ieee80211_local *local = sdata->local;
2122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2124 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2125 IEEE80211_STA_BEACON_POLL);
2127 ieee80211_set_disassoc(sdata, true, true);
2128 mutex_unlock(&ifmgd->mtx);
2129 mutex_lock(&local->mtx);
2130 ieee80211_recalc_idle(local);
2131 mutex_unlock(&local->mtx);
2133 * must be outside lock due to cfg80211,
2134 * but that's not a problem.
2136 ieee80211_send_deauth_disassoc(sdata, bssid,
2137 IEEE80211_STYPE_DEAUTH, reason,
2139 mutex_lock(&ifmgd->mtx);
2142 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2144 struct ieee80211_local *local = sdata->local;
2145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147 /* then process the rest of the work */
2148 mutex_lock(&ifmgd->mtx);
2150 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2151 IEEE80211_STA_CONNECTION_POLL) &&
2152 ifmgd->associated) {
2156 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2158 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2159 max_tries = max_nullfunc_tries;
2161 max_tries = max_probe_tries;
2163 /* ACK received for nullfunc probing frame */
2164 if (!ifmgd->probe_send_count)
2165 ieee80211_reset_ap_probe(sdata);
2166 else if (ifmgd->nullfunc_failed) {
2167 if (ifmgd->probe_send_count < max_tries) {
2168 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2169 wiphy_debug(local->hw.wiphy,
2170 "%s: No ack for nullfunc frame to"
2171 " AP %pM, try %d/%i\n",
2173 ifmgd->probe_send_count, max_tries);
2175 ieee80211_mgd_probe_ap_send(sdata);
2177 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2178 wiphy_debug(local->hw.wiphy,
2179 "%s: No ack for nullfunc frame to"
2180 " AP %pM, disconnecting.\n",
2181 sdata->name, bssid);
2183 ieee80211_sta_connection_lost(sdata, bssid,
2184 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2186 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2187 run_again(ifmgd, ifmgd->probe_timeout);
2188 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2189 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2190 wiphy_debug(local->hw.wiphy,
2191 "%s: Failed to send nullfunc to AP %pM"
2192 " after %dms, disconnecting.\n",
2194 bssid, probe_wait_ms);
2196 ieee80211_sta_connection_lost(sdata, bssid,
2197 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2198 } else if (ifmgd->probe_send_count < max_tries) {
2199 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2200 wiphy_debug(local->hw.wiphy,
2201 "%s: No probe response from AP %pM"
2202 " after %dms, try %d/%i\n",
2204 bssid, probe_wait_ms,
2205 ifmgd->probe_send_count, max_tries);
2207 ieee80211_mgd_probe_ap_send(sdata);
2210 * We actually lost the connection ... or did we?
2213 wiphy_debug(local->hw.wiphy,
2214 "%s: No probe response from AP %pM"
2215 " after %dms, disconnecting.\n",
2217 bssid, probe_wait_ms);
2219 ieee80211_sta_connection_lost(sdata, bssid,
2220 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2224 mutex_unlock(&ifmgd->mtx);
2227 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2229 struct ieee80211_sub_if_data *sdata =
2230 (struct ieee80211_sub_if_data *) data;
2231 struct ieee80211_local *local = sdata->local;
2233 if (local->quiescing)
2236 ieee80211_queue_work(&sdata->local->hw,
2237 &sdata->u.mgd.beacon_connection_loss_work);
2240 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2242 struct ieee80211_sub_if_data *sdata =
2243 (struct ieee80211_sub_if_data *) data;
2244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2245 struct ieee80211_local *local = sdata->local;
2247 if (local->quiescing)
2250 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2253 static void ieee80211_sta_monitor_work(struct work_struct *work)
2255 struct ieee80211_sub_if_data *sdata =
2256 container_of(work, struct ieee80211_sub_if_data,
2257 u.mgd.monitor_work);
2259 ieee80211_mgd_probe_ap(sdata, false);
2262 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2264 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2265 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2266 IEEE80211_STA_CONNECTION_POLL);
2268 /* let's probe the connection once */
2269 ieee80211_queue_work(&sdata->local->hw,
2270 &sdata->u.mgd.monitor_work);
2271 /* and do all the other regular work too */
2272 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2277 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2279 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2282 * we need to use atomic bitops for the running bits
2283 * only because both timers might fire at the same
2284 * time -- the code here is properly synchronised.
2287 cancel_work_sync(&ifmgd->request_smps_work);
2289 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2290 if (del_timer_sync(&ifmgd->timer))
2291 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2293 cancel_work_sync(&ifmgd->chswitch_work);
2294 if (del_timer_sync(&ifmgd->chswitch_timer))
2295 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2297 cancel_work_sync(&ifmgd->monitor_work);
2298 /* these will just be re-established on connection */
2299 del_timer_sync(&ifmgd->conn_mon_timer);
2300 del_timer_sync(&ifmgd->bcn_mon_timer);
2303 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2307 if (!ifmgd->associated)
2310 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2311 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2312 mutex_lock(&ifmgd->mtx);
2313 if (ifmgd->associated) {
2314 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2315 wiphy_debug(sdata->local->hw.wiphy,
2316 "%s: driver requested disconnect after resume.\n",
2319 ieee80211_sta_connection_lost(sdata,
2320 ifmgd->associated->bssid,
2321 WLAN_REASON_UNSPECIFIED);
2322 mutex_unlock(&ifmgd->mtx);
2325 mutex_unlock(&ifmgd->mtx);
2328 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2329 add_timer(&ifmgd->timer);
2330 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2331 add_timer(&ifmgd->chswitch_timer);
2332 ieee80211_sta_reset_beacon_monitor(sdata);
2333 ieee80211_restart_sta_timer(sdata);
2334 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
2338 /* interface setup */
2339 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2341 struct ieee80211_if_managed *ifmgd;
2343 ifmgd = &sdata->u.mgd;
2344 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2345 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2346 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2347 ieee80211_beacon_connection_loss_work);
2348 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2349 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2350 (unsigned long) sdata);
2351 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2352 (unsigned long) sdata);
2353 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2354 (unsigned long) sdata);
2355 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2356 (unsigned long) sdata);
2360 mutex_init(&ifmgd->mtx);
2362 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2363 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2365 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2368 /* scan finished notification */
2369 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2371 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2373 /* Restart STA timers */
2375 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2376 ieee80211_restart_sta_timer(sdata);
2380 int ieee80211_max_network_latency(struct notifier_block *nb,
2381 unsigned long data, void *dummy)
2383 s32 latency_usec = (s32) data;
2384 struct ieee80211_local *local =
2385 container_of(nb, struct ieee80211_local,
2386 network_latency_notifier);
2388 mutex_lock(&local->iflist_mtx);
2389 ieee80211_recalc_ps(local, latency_usec);
2390 mutex_unlock(&local->iflist_mtx);
2396 static enum work_done_result
2397 ieee80211_probe_auth_done(struct ieee80211_work *wk,
2398 struct sk_buff *skb)
2400 struct ieee80211_local *local = wk->sdata->local;
2403 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2407 if (wk->type == IEEE80211_WORK_AUTH) {
2408 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2412 mutex_lock(&wk->sdata->u.mgd.mtx);
2413 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2414 mutex_unlock(&wk->sdata->u.mgd.mtx);
2416 wk->type = IEEE80211_WORK_AUTH;
2417 wk->probe_auth.tries = 0;
2418 return WORK_DONE_REQUEUE;
2420 if (wk->probe_auth.synced)
2421 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2422 IEEE80211_TX_SYNC_AUTH);
2424 return WORK_DONE_DESTROY;
2427 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2428 struct cfg80211_auth_request *req)
2431 struct ieee80211_work *wk;
2434 if (req->local_state_change)
2435 return 0; /* no need to update mac80211 state */
2437 switch (req->auth_type) {
2438 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2439 auth_alg = WLAN_AUTH_OPEN;
2441 case NL80211_AUTHTYPE_SHARED_KEY:
2442 if (IS_ERR(sdata->local->wep_tx_tfm))
2444 auth_alg = WLAN_AUTH_SHARED_KEY;
2446 case NL80211_AUTHTYPE_FT:
2447 auth_alg = WLAN_AUTH_FT;
2449 case NL80211_AUTHTYPE_NETWORK_EAP:
2450 auth_alg = WLAN_AUTH_LEAP;
2456 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2460 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2462 if (req->ie && req->ie_len) {
2463 memcpy(wk->ie, req->ie, req->ie_len);
2464 wk->ie_len = req->ie_len;
2467 if (req->key && req->key_len) {
2468 wk->probe_auth.key_len = req->key_len;
2469 wk->probe_auth.key_idx = req->key_idx;
2470 memcpy(wk->probe_auth.key, req->key, req->key_len);
2473 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2474 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2475 wk->probe_auth.ssid_len = ssid[1];
2477 wk->probe_auth.algorithm = auth_alg;
2478 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
2480 /* if we already have a probe, don't probe again */
2481 if (req->bss->proberesp_ies)
2482 wk->type = IEEE80211_WORK_AUTH;
2484 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2485 wk->chan = req->bss->channel;
2486 wk->chan_type = NL80211_CHAN_NO_HT;
2488 wk->done = ieee80211_probe_auth_done;
2490 ieee80211_add_work(wk);
2494 /* create and insert a dummy station entry */
2495 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2497 struct sta_info *sta;
2500 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
2506 err = sta_info_insert(sta);
2509 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2510 " the AP (error %d)\n", sdata->name, err);
2517 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2518 struct sk_buff *skb)
2520 struct ieee80211_local *local = wk->sdata->local;
2521 struct ieee80211_mgmt *mgmt;
2522 struct ieee80211_rx_status *rx_status;
2523 struct ieee802_11_elems elems;
2524 struct cfg80211_bss *cbss = wk->assoc.bss;
2528 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2529 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2533 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2534 mutex_lock(&wk->sdata->u.mgd.mtx);
2535 rx_status = (void *) skb->cb;
2536 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2537 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2539 mutex_unlock(&wk->sdata->u.mgd.mtx);
2541 wk->type = IEEE80211_WORK_ASSOC;
2542 /* not really done yet */
2543 return WORK_DONE_REQUEUE;
2546 mgmt = (void *)skb->data;
2547 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2549 if (status == WLAN_STATUS_SUCCESS) {
2550 if (wk->assoc.synced)
2551 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2552 IEEE80211_TX_SYNC_ASSOC);
2554 mutex_lock(&wk->sdata->u.mgd.mtx);
2555 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2556 mutex_unlock(&wk->sdata->u.mgd.mtx);
2557 /* oops -- internal error -- send timeout for now */
2558 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2559 cfg80211_send_assoc_timeout(wk->sdata->dev,
2561 return WORK_DONE_DESTROY;
2564 mutex_unlock(&wk->sdata->u.mgd.mtx);
2566 /* assoc failed - destroy the dummy station entry */
2567 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2570 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2572 if (wk->assoc.synced)
2573 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2574 IEEE80211_TX_SYNC_ASSOC);
2576 return WORK_DONE_DESTROY;
2579 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2580 struct cfg80211_assoc_request *req)
2582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2583 struct ieee80211_bss *bss = (void *)req->bss->priv;
2584 struct ieee80211_work *wk;
2588 mutex_lock(&ifmgd->mtx);
2589 if (ifmgd->associated) {
2590 if (!req->prev_bssid ||
2591 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2594 * We are already associated and the request was not a
2595 * reassociation request from the current BSS, so
2598 mutex_unlock(&ifmgd->mtx);
2602 /* Trying to reassociate - clear previous association state */
2603 ieee80211_set_disassoc(sdata, true, false);
2605 mutex_unlock(&ifmgd->mtx);
2607 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2612 * create a dummy station info entry in order
2613 * to start accepting incoming EAPOL packets from the station
2615 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2621 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2622 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2624 ifmgd->beacon_crc_valid = false;
2626 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2627 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2628 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2629 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2630 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2633 if (req->ie && req->ie_len) {
2634 memcpy(wk->ie, req->ie, req->ie_len);
2635 wk->ie_len = req->ie_len;
2639 wk->assoc.bss = req->bss;
2641 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2643 /* new association always uses requested smps mode */
2644 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2645 if (ifmgd->powersave)
2646 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2648 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2650 ifmgd->ap_smps = ifmgd->req_smps;
2652 wk->assoc.smps = ifmgd->ap_smps;
2654 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2655 * We still associate in non-HT mode (11a/b/g) if any one of these
2656 * ciphers is configured as pairwise.
2657 * We can set this to true for non-11n hardware, that'll be checked
2658 * separately along with the peer capabilities.
2660 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2661 wk->assoc.capability = req->bss->capability;
2662 wk->assoc.wmm_used = bss->wmm_used;
2663 wk->assoc.supp_rates = bss->supp_rates;
2664 wk->assoc.supp_rates_len = bss->supp_rates_len;
2665 wk->assoc.ht_information_ie =
2666 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2668 if (bss->wmm_used && bss->uapsd_supported &&
2669 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2670 wk->assoc.uapsd_used = true;
2671 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2673 wk->assoc.uapsd_used = false;
2674 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2677 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2678 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2679 wk->assoc.ssid_len = ssid[1];
2681 if (req->prev_bssid)
2682 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2684 wk->chan = req->bss->channel;
2685 wk->chan_type = NL80211_CHAN_NO_HT;
2687 wk->done = ieee80211_assoc_done;
2688 if (!bss->dtim_period &&
2689 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2690 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2692 wk->type = IEEE80211_WORK_ASSOC;
2695 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2696 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2698 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2699 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2702 if (req->crypto.control_port)
2703 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2705 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2707 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2708 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2710 ieee80211_add_work(wk);
2714 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2715 struct cfg80211_deauth_request *req,
2718 struct ieee80211_local *local = sdata->local;
2719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2720 struct ieee80211_work *wk;
2722 bool assoc_bss = false;
2724 mutex_lock(&ifmgd->mtx);
2726 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2727 if (ifmgd->associated == req->bss) {
2728 ieee80211_set_disassoc(sdata, false, true);
2729 mutex_unlock(&ifmgd->mtx);
2732 bool not_auth_yet = false;
2734 mutex_unlock(&ifmgd->mtx);
2736 mutex_lock(&local->mtx);
2737 list_for_each_entry(wk, &local->work_list, list) {
2738 if (wk->sdata != sdata)
2741 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2742 wk->type != IEEE80211_WORK_AUTH &&
2743 wk->type != IEEE80211_WORK_ASSOC &&
2744 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2747 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2750 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2751 list_del_rcu(&wk->list);
2755 mutex_unlock(&local->mtx);
2758 * If somebody requests authentication and we haven't
2759 * sent out an auth frame yet there's no need to send
2760 * out a deauth frame either. If the state was PROBE,
2761 * then this is the case. If it's AUTH we have sent a
2762 * frame, and if it's IDLE we have completed the auth
2766 __cfg80211_auth_canceled(sdata->dev, bssid);
2771 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2772 sdata->name, bssid, req->reason_code);
2774 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2775 req->reason_code, cookie,
2776 !req->local_state_change);
2778 sta_info_flush(sdata->local, sdata);
2780 mutex_lock(&sdata->local->mtx);
2781 ieee80211_recalc_idle(sdata->local);
2782 mutex_unlock(&sdata->local->mtx);
2787 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2788 struct cfg80211_disassoc_request *req,
2791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2794 mutex_lock(&ifmgd->mtx);
2797 * cfg80211 should catch this ... but it's racy since
2798 * we can receive a disassoc frame, process it, hand it
2799 * to cfg80211 while that's in a locked section already
2800 * trying to tell us that the user wants to disconnect.
2802 if (ifmgd->associated != req->bss) {
2803 mutex_unlock(&ifmgd->mtx);
2807 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2808 sdata->name, req->bss->bssid, req->reason_code);
2810 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2811 ieee80211_set_disassoc(sdata, false, true);
2813 mutex_unlock(&ifmgd->mtx);
2815 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2816 IEEE80211_STYPE_DISASSOC, req->reason_code,
2817 cookie, !req->local_state_change);
2818 sta_info_flush(sdata->local, sdata);
2820 mutex_lock(&sdata->local->mtx);
2821 ieee80211_recalc_idle(sdata->local);
2822 mutex_unlock(&sdata->local->mtx);
2827 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2828 enum nl80211_cqm_rssi_threshold_event rssi_event,
2831 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2833 trace_api_cqm_rssi_notify(sdata, rssi_event);
2835 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2837 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
2839 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2841 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2842 return sdata->dev->operstate;
2844 EXPORT_SYMBOL(ieee80211_get_operstate);