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/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 static int max_nullfunc_tries = 2;
34 module_param(max_nullfunc_tries, int, 0644);
35 MODULE_PARM_DESC(max_nullfunc_tries,
36 "Maximum nullfunc tx tries before disconnecting (reason 4).");
38 static int max_probe_tries = 5;
39 module_param(max_probe_tries, int, 0644);
40 MODULE_PARM_DESC(max_probe_tries,
41 "Maximum probe tries before disconnecting (reason 4).");
44 * Beacon loss timeout is calculated as N frames times the
45 * advertised beacon interval. This may need to be somewhat
46 * higher than what hardware might detect to account for
47 * delays in the host processing frames. But since we also
48 * probe on beacon miss before declaring the connection lost
49 * default to what we want.
51 #define IEEE80211_BEACON_LOSS_COUNT 7
54 * Time the connection can be idle before we probe
55 * it to see if we can still talk to the AP.
57 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
59 * Time we wait for a probe response after sending
60 * a probe request because of beacon loss or for
61 * checking the connection still works.
63 static int probe_wait_ms = 500;
64 module_param(probe_wait_ms, int, 0644);
65 MODULE_PARM_DESC(probe_wait_ms,
66 "Maximum time(ms) to wait for probe response"
67 " before disconnecting (reason 4).");
70 * Weight given to the latest Beacon frame when calculating average signal
71 * strength for Beacon frames received in the current BSS. This must be
74 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
77 * How many Beacon frames need to have been used in average signal strength
78 * before starting to indicate signal change events.
80 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
82 #define TMR_RUNNING_TIMER 0
83 #define TMR_RUNNING_CHANSW 1
86 * All cfg80211 functions have to be called outside a locked
87 * section so that they can acquire a lock themselves... This
88 * is much simpler than queuing up things in cfg80211, but we
89 * do need some indirection for that here.
92 /* no action required */
95 /* caller must call cfg80211_send_deauth() */
96 RX_MGMT_CFG80211_DEAUTH,
98 /* caller must call cfg80211_send_disassoc() */
99 RX_MGMT_CFG80211_DISASSOC,
103 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
105 lockdep_assert_held(&ifmgd->mtx);
109 * We can have multiple work items (and connection probing)
110 * scheduling this timer, but we need to take care to only
111 * reschedule it when it should fire _earlier_ than it was
112 * asked for before, or if it's not pending right now. This
113 * function ensures that. Note that it then is required to
114 * run this function for all timeouts after the first one
115 * has happened -- the work that runs from this timer will
118 static void run_again(struct ieee80211_if_managed *ifmgd,
119 unsigned long timeout)
121 ASSERT_MGD_MTX(ifmgd);
123 if (!timer_pending(&ifmgd->timer) ||
124 time_before(timeout, ifmgd->timer.expires))
125 mod_timer(&ifmgd->timer, timeout);
128 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
130 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
133 mod_timer(&sdata->u.mgd.bcn_mon_timer,
134 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
137 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
141 if (unlikely(!sdata->u.mgd.associated))
144 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
147 mod_timer(&sdata->u.mgd.conn_mon_timer,
148 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
150 ifmgd->probe_send_count = 0;
153 static int ecw2cw(int ecw)
155 return (1 << ecw) - 1;
159 * ieee80211_enable_ht should be called only after the operating band
160 * has been determined as ht configuration depends on the hw's
161 * HT abilities for a specific band.
163 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
164 struct ieee80211_ht_info *hti,
165 const u8 *bssid, u16 ap_ht_cap_flags,
166 bool beacon_htcap_ie)
168 struct ieee80211_local *local = sdata->local;
169 struct ieee80211_supported_band *sband;
170 struct sta_info *sta;
174 bool enable_ht = true;
175 enum nl80211_channel_type prev_chantype;
176 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
178 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
180 prev_chantype = sdata->vif.bss_conf.channel_type;
182 /* HT is not supported */
183 if (!sband->ht_cap.ht_supported)
187 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
189 /* check that channel matches the right operating channel */
190 if (local->hw.conf.channel->center_freq != hti_cfreq) {
191 /* Some APs mess this up, evidently.
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel, for instance.
196 "%s: Wrong control channel in association"
197 " response: configured center-freq: %d"
198 " hti-cfreq: %d hti->control_chan: %d"
199 " band: %d. Disabling HT.\n",
201 local->hw.conf.channel->center_freq,
202 hti_cfreq, hti->control_chan,
209 channel_type = NL80211_CHAN_HT20;
211 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
212 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
213 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
214 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
215 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
216 if (!(local->hw.conf.channel->flags &
217 IEEE80211_CHAN_NO_HT40PLUS))
218 channel_type = NL80211_CHAN_HT40PLUS;
220 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
221 if (!(local->hw.conf.channel->flags &
222 IEEE80211_CHAN_NO_HT40MINUS))
223 channel_type = NL80211_CHAN_HT40MINUS;
229 if (local->tmp_channel)
230 local->tmp_channel_type = channel_type;
232 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
233 /* can only fail due to HT40+/- mismatch */
234 channel_type = NL80211_CHAN_HT20;
235 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
238 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
240 * Whenever the AP announces the HT mode change that can be
241 * 40MHz intolerant or etc., it would be safer to stop tx
242 * queues before doing hw config to avoid buffer overflow.
244 ieee80211_stop_queues_by_reason(&sdata->local->hw,
245 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
247 /* flush out all packets */
250 drv_flush(local, false);
253 /* channel_type change automatically detected */
254 ieee80211_hw_config(local, 0);
256 if (prev_chantype != channel_type) {
258 sta = sta_info_get(sdata, bssid);
260 rate_control_rate_update(local, sband, sta,
261 IEEE80211_RC_HT_CHANGED,
266 ieee80211_wake_queues_by_reason(&sdata->local->hw,
267 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
270 ht_opmode = le16_to_cpu(hti->operation_mode);
272 /* if bss configuration changed store the new one */
273 if (sdata->ht_opmode_valid != enable_ht ||
274 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
275 prev_chantype != channel_type) {
276 changed |= BSS_CHANGED_HT;
277 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
278 sdata->ht_opmode_valid = enable_ht;
284 /* frame sending functions */
286 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
287 const u8 *bssid, u16 stype, u16 reason,
288 void *cookie, bool send_frame)
290 struct ieee80211_local *local = sdata->local;
291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
293 struct ieee80211_mgmt *mgmt;
295 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
299 skb_reserve(skb, local->hw.extra_tx_headroom);
301 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
303 memcpy(mgmt->da, bssid, ETH_ALEN);
304 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
305 memcpy(mgmt->bssid, bssid, ETH_ALEN);
306 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
308 /* u.deauth.reason_code == u.disassoc.reason_code */
309 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
311 if (stype == IEEE80211_STYPE_DEAUTH)
313 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
315 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
318 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
320 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
321 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
322 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
325 ieee80211_tx_skb(sdata, skb);
330 void ieee80211_send_pspoll(struct ieee80211_local *local,
331 struct ieee80211_sub_if_data *sdata)
333 struct ieee80211_pspoll *pspoll;
336 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
340 pspoll = (struct ieee80211_pspoll *) skb->data;
341 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
343 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
344 ieee80211_tx_skb(sdata, skb);
347 void ieee80211_send_nullfunc(struct ieee80211_local *local,
348 struct ieee80211_sub_if_data *sdata,
352 struct ieee80211_hdr_3addr *nullfunc;
353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
355 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
359 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
361 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
363 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
364 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
365 IEEE80211_STA_CONNECTION_POLL))
366 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
368 ieee80211_tx_skb(sdata, skb);
371 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
372 struct ieee80211_sub_if_data *sdata)
375 struct ieee80211_hdr *nullfunc;
378 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
381 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
385 skb_reserve(skb, local->hw.extra_tx_headroom);
387 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
388 memset(nullfunc, 0, 30);
389 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
390 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
391 nullfunc->frame_control = fc;
392 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
393 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
394 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
395 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
397 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
398 ieee80211_tx_skb(sdata, skb);
401 /* spectrum management related things */
402 static void ieee80211_chswitch_work(struct work_struct *work)
404 struct ieee80211_sub_if_data *sdata =
405 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
408 if (!ieee80211_sdata_running(sdata))
411 mutex_lock(&ifmgd->mtx);
412 if (!ifmgd->associated)
415 sdata->local->oper_channel = sdata->local->csa_channel;
416 if (!sdata->local->ops->channel_switch) {
417 /* call "hw_config" only if doing sw channel switch */
418 ieee80211_hw_config(sdata->local,
419 IEEE80211_CONF_CHANGE_CHANNEL);
421 /* update the device channel directly */
422 sdata->local->hw.conf.channel = sdata->local->oper_channel;
425 /* XXX: shouldn't really modify cfg80211-owned data! */
426 ifmgd->associated->channel = sdata->local->oper_channel;
428 ieee80211_wake_queues_by_reason(&sdata->local->hw,
429 IEEE80211_QUEUE_STOP_REASON_CSA);
431 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
432 mutex_unlock(&ifmgd->mtx);
435 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
437 struct ieee80211_sub_if_data *sdata;
438 struct ieee80211_if_managed *ifmgd;
440 sdata = vif_to_sdata(vif);
441 ifmgd = &sdata->u.mgd;
443 trace_api_chswitch_done(sdata, success);
446 * If the channel switch was not successful, stay
447 * around on the old channel. We currently lack
448 * good handling of this situation, possibly we
449 * should just drop the association.
451 sdata->local->csa_channel = sdata->local->oper_channel;
454 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
456 EXPORT_SYMBOL(ieee80211_chswitch_done);
458 static void ieee80211_chswitch_timer(unsigned long data)
460 struct ieee80211_sub_if_data *sdata =
461 (struct ieee80211_sub_if_data *) data;
462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
464 if (sdata->local->quiescing) {
465 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
469 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
472 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
473 struct ieee80211_channel_sw_ie *sw_elem,
474 struct ieee80211_bss *bss,
477 struct cfg80211_bss *cbss =
478 container_of((void *)bss, struct cfg80211_bss, priv);
479 struct ieee80211_channel *new_ch;
480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
481 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
482 cbss->channel->band);
484 ASSERT_MGD_MTX(ifmgd);
486 if (!ifmgd->associated)
489 if (sdata->local->scanning)
492 /* Disregard subsequent beacons if we are already running a timer
495 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
498 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
499 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
502 sdata->local->csa_channel = new_ch;
504 if (sdata->local->ops->channel_switch) {
505 /* use driver's channel switch callback */
506 struct ieee80211_channel_switch ch_switch;
507 memset(&ch_switch, 0, sizeof(ch_switch));
508 ch_switch.timestamp = timestamp;
510 ch_switch.block_tx = true;
511 ieee80211_stop_queues_by_reason(&sdata->local->hw,
512 IEEE80211_QUEUE_STOP_REASON_CSA);
514 ch_switch.channel = new_ch;
515 ch_switch.count = sw_elem->count;
516 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
517 drv_channel_switch(sdata->local, &ch_switch);
521 /* channel switch handled in software */
522 if (sw_elem->count <= 1) {
523 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
526 ieee80211_stop_queues_by_reason(&sdata->local->hw,
527 IEEE80211_QUEUE_STOP_REASON_CSA);
528 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
529 mod_timer(&ifmgd->chswitch_timer,
531 msecs_to_jiffies(sw_elem->count *
532 cbss->beacon_interval));
536 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
537 u16 capab_info, u8 *pwr_constr_elem,
538 u8 pwr_constr_elem_len)
540 struct ieee80211_conf *conf = &sdata->local->hw.conf;
542 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
545 /* Power constraint IE length should be 1 octet */
546 if (pwr_constr_elem_len != 1)
549 if ((*pwr_constr_elem <= conf->channel->max_power) &&
550 (*pwr_constr_elem != sdata->local->power_constr_level)) {
551 sdata->local->power_constr_level = *pwr_constr_elem;
552 ieee80211_hw_config(sdata->local, 0);
556 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
558 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
559 struct ieee80211_local *local = sdata->local;
560 struct ieee80211_conf *conf = &local->hw.conf;
562 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
563 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
564 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
566 local->disable_dynamic_ps = false;
567 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
569 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
571 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
573 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
574 struct ieee80211_local *local = sdata->local;
575 struct ieee80211_conf *conf = &local->hw.conf;
577 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
578 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
579 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
581 local->disable_dynamic_ps = true;
582 conf->dynamic_ps_timeout = 0;
583 del_timer_sync(&local->dynamic_ps_timer);
584 ieee80211_queue_work(&local->hw,
585 &local->dynamic_ps_enable_work);
587 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
590 static void ieee80211_enable_ps(struct ieee80211_local *local,
591 struct ieee80211_sub_if_data *sdata)
593 struct ieee80211_conf *conf = &local->hw.conf;
596 * If we are scanning right now then the parameters will
597 * take effect when scan finishes.
602 if (conf->dynamic_ps_timeout > 0 &&
603 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
604 mod_timer(&local->dynamic_ps_timer, jiffies +
605 msecs_to_jiffies(conf->dynamic_ps_timeout));
607 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
608 ieee80211_send_nullfunc(local, sdata, 1);
610 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
611 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
614 conf->flags |= IEEE80211_CONF_PS;
615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
619 static void ieee80211_change_ps(struct ieee80211_local *local)
621 struct ieee80211_conf *conf = &local->hw.conf;
623 if (local->ps_sdata) {
624 ieee80211_enable_ps(local, local->ps_sdata);
625 } else if (conf->flags & IEEE80211_CONF_PS) {
626 conf->flags &= ~IEEE80211_CONF_PS;
627 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
628 del_timer_sync(&local->dynamic_ps_timer);
629 cancel_work_sync(&local->dynamic_ps_enable_work);
633 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
635 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
636 struct sta_info *sta = NULL;
637 bool authorized = false;
642 if (!mgd->associated)
645 if (!mgd->associated->beacon_ies)
648 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
649 IEEE80211_STA_CONNECTION_POLL))
653 sta = sta_info_get(sdata, mgd->bssid);
655 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
661 /* need to hold RTNL or interface lock */
662 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
664 struct ieee80211_sub_if_data *sdata, *found = NULL;
668 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
669 local->ps_sdata = NULL;
673 if (!list_empty(&local->work_list)) {
674 local->ps_sdata = NULL;
678 list_for_each_entry(sdata, &local->interfaces, list) {
679 if (!ieee80211_sdata_running(sdata))
681 if (sdata->vif.type == NL80211_IFTYPE_AP) {
682 /* If an AP vif is found, then disable PS
683 * by setting the count to zero thereby setting
689 if (sdata->vif.type != NL80211_IFTYPE_STATION)
695 if (count == 1 && ieee80211_powersave_allowed(found)) {
696 struct ieee80211_conf *conf = &local->hw.conf;
700 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
702 beaconint_us = ieee80211_tu_to_usec(
703 found->vif.bss_conf.beacon_int);
705 timeout = local->dynamic_ps_forced_timeout;
708 * Go to full PSM if the user configures a very low
709 * latency requirement.
710 * The 2000 second value is there for compatibility
711 * until the PM_QOS_NETWORK_LATENCY is configured
714 if (latency > (1900 * USEC_PER_MSEC) &&
715 latency != (2000 * USEC_PER_SEC))
720 local->dynamic_ps_user_timeout = timeout;
721 if (!local->disable_dynamic_ps)
722 conf->dynamic_ps_timeout =
723 local->dynamic_ps_user_timeout;
725 if (beaconint_us > latency) {
726 local->ps_sdata = NULL;
728 struct ieee80211_bss *bss;
732 bss = (void *)found->u.mgd.associated->priv;
733 dtimper = bss->dtim_period;
735 /* If the TIM IE is invalid, pretend the value is 1 */
738 else if (dtimper > 1)
739 maxslp = min_t(int, dtimper,
740 latency / beaconint_us);
742 local->hw.conf.max_sleep_period = maxslp;
743 local->hw.conf.ps_dtim_period = dtimper;
744 local->ps_sdata = found;
747 local->ps_sdata = NULL;
751 ieee80211_change_ps(local);
754 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
756 struct ieee80211_local *local =
757 container_of(work, struct ieee80211_local,
758 dynamic_ps_disable_work);
760 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
761 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
762 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
765 ieee80211_wake_queues_by_reason(&local->hw,
766 IEEE80211_QUEUE_STOP_REASON_PS);
769 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
771 struct ieee80211_local *local =
772 container_of(work, struct ieee80211_local,
773 dynamic_ps_enable_work);
774 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
775 struct ieee80211_if_managed *ifmgd;
779 /* can only happen when PS was just disabled anyway */
783 ifmgd = &sdata->u.mgd;
785 if (local->hw.conf.flags & IEEE80211_CONF_PS)
788 if (!local->disable_dynamic_ps &&
789 local->hw.conf.dynamic_ps_timeout > 0) {
790 /* don't enter PS if TX frames are pending */
791 if (drv_tx_frames_pending(local)) {
792 mod_timer(&local->dynamic_ps_timer, jiffies +
794 local->hw.conf.dynamic_ps_timeout));
799 * transmission can be stopped by others which leads to
800 * dynamic_ps_timer expiry. Postpone the ps timer if it
801 * is not the actual idle state.
803 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
804 for (q = 0; q < local->hw.queues; q++) {
805 if (local->queue_stop_reasons[q]) {
806 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
808 mod_timer(&local->dynamic_ps_timer, jiffies +
810 local->hw.conf.dynamic_ps_timeout));
814 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
817 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
818 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
819 netif_tx_stop_all_queues(sdata->dev);
821 if (drv_tx_frames_pending(local))
822 mod_timer(&local->dynamic_ps_timer, jiffies +
824 local->hw.conf.dynamic_ps_timeout));
826 ieee80211_send_nullfunc(local, sdata, 1);
827 /* Flush to get the tx status of nullfunc frame */
828 drv_flush(local, false);
832 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
833 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
834 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
835 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
836 local->hw.conf.flags |= IEEE80211_CONF_PS;
837 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
840 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
841 netif_tx_wake_all_queues(sdata->dev);
844 void ieee80211_dynamic_ps_timer(unsigned long data)
846 struct ieee80211_local *local = (void *) data;
848 if (local->quiescing || local->suspended)
851 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
855 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
856 struct ieee80211_sub_if_data *sdata,
857 u8 *wmm_param, size_t wmm_param_len)
859 struct ieee80211_tx_queue_params params;
860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
863 u8 *pos, uapsd_queues = 0;
865 if (!local->ops->conf_tx)
868 if (local->hw.queues < 4)
874 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
877 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
878 uapsd_queues = local->uapsd_queues;
880 count = wmm_param[6] & 0x0f;
881 if (count == ifmgd->wmm_last_param_set)
883 ifmgd->wmm_last_param_set = count;
886 left = wmm_param_len - 8;
888 memset(¶ms, 0, sizeof(params));
891 for (; left >= 4; left -= 4, pos += 4) {
892 int aci = (pos[0] >> 5) & 0x03;
893 int acm = (pos[0] >> 4) & 0x01;
901 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
902 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
908 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
909 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
915 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
916 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
923 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
924 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
929 params.aifs = pos[0] & 0x0f;
930 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
931 params.cw_min = ecw2cw(pos[1] & 0x0f);
932 params.txop = get_unaligned_le16(pos + 2);
933 params.uapsd = uapsd;
935 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
936 wiphy_debug(local->hw.wiphy,
937 "WMM queue=%d aci=%d acm=%d aifs=%d "
938 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
940 params.aifs, params.cw_min, params.cw_max,
941 params.txop, params.uapsd);
943 sdata->tx_conf[queue] = params;
944 if (drv_conf_tx(local, sdata, queue, ¶ms))
945 wiphy_debug(local->hw.wiphy,
946 "failed to set TX queue parameters for queue %d\n",
950 /* enable WMM or activate new settings */
951 sdata->vif.bss_conf.qos = true;
952 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
955 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
956 u16 capab, bool erp_valid, u8 erp)
958 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
961 bool use_short_preamble;
965 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
966 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
968 use_protection = false;
969 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
972 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
973 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
974 use_short_slot = true;
976 if (use_protection != bss_conf->use_cts_prot) {
977 bss_conf->use_cts_prot = use_protection;
978 changed |= BSS_CHANGED_ERP_CTS_PROT;
981 if (use_short_preamble != bss_conf->use_short_preamble) {
982 bss_conf->use_short_preamble = use_short_preamble;
983 changed |= BSS_CHANGED_ERP_PREAMBLE;
986 if (use_short_slot != bss_conf->use_short_slot) {
987 bss_conf->use_short_slot = use_short_slot;
988 changed |= BSS_CHANGED_ERP_SLOT;
994 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
995 struct cfg80211_bss *cbss,
996 u32 bss_info_changed)
998 struct ieee80211_bss *bss = (void *)cbss->priv;
999 struct ieee80211_local *local = sdata->local;
1000 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1002 bss_info_changed |= BSS_CHANGED_ASSOC;
1003 /* set timing information */
1004 bss_conf->beacon_int = cbss->beacon_interval;
1005 bss_conf->timestamp = cbss->tsf;
1007 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1008 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1009 cbss->capability, bss->has_erp_value, bss->erp_value);
1011 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1012 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1014 sdata->u.mgd.associated = cbss;
1015 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1017 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1019 /* just to be sure */
1020 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1021 IEEE80211_STA_BEACON_POLL);
1023 ieee80211_led_assoc(local, 1);
1025 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1026 bss_conf->dtim_period = bss->dtim_period;
1028 bss_conf->dtim_period = 0;
1030 bss_conf->assoc = 1;
1032 * For now just always ask the driver to update the basic rateset
1033 * when we have associated, we aren't checking whether it actually
1036 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1038 /* And the BSSID changed - we're associated now */
1039 bss_info_changed |= BSS_CHANGED_BSSID;
1041 /* Tell the driver to monitor connection quality (if supported) */
1042 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
1043 bss_conf->cqm_rssi_thold)
1044 bss_info_changed |= BSS_CHANGED_CQM;
1046 /* Enable ARP filtering */
1047 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1048 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1049 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1052 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1054 mutex_lock(&local->iflist_mtx);
1055 ieee80211_recalc_ps(local, -1);
1056 ieee80211_recalc_smps(local);
1057 mutex_unlock(&local->iflist_mtx);
1059 netif_tx_start_all_queues(sdata->dev);
1060 netif_carrier_on(sdata->dev);
1063 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1064 bool remove_sta, bool tx)
1066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1067 struct ieee80211_local *local = sdata->local;
1068 struct sta_info *sta;
1069 u32 changed = 0, config_changed = 0;
1072 ASSERT_MGD_MTX(ifmgd);
1074 if (WARN_ON(!ifmgd->associated))
1077 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1079 ifmgd->associated = NULL;
1080 memset(ifmgd->bssid, 0, ETH_ALEN);
1083 * we need to commit the associated = NULL change because the
1084 * scan code uses that to determine whether this iface should
1085 * go to/wake up from powersave or not -- and could otherwise
1086 * wake the queues erroneously.
1091 * Thus, we can only afterwards stop the queues -- to account
1092 * for the case where another CPU is finishing a scan at this
1093 * time -- we don't want the scan code to enable queues.
1096 netif_tx_stop_all_queues(sdata->dev);
1097 netif_carrier_off(sdata->dev);
1099 mutex_lock(&local->sta_mtx);
1100 sta = sta_info_get(sdata, bssid);
1102 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1103 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1105 mutex_unlock(&local->sta_mtx);
1107 changed |= ieee80211_reset_erp_info(sdata);
1109 ieee80211_led_assoc(local, 0);
1110 changed |= BSS_CHANGED_ASSOC;
1111 sdata->vif.bss_conf.assoc = false;
1113 ieee80211_set_wmm_default(sdata);
1115 /* channel(_type) changes are handled by ieee80211_hw_config */
1116 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1118 /* on the next assoc, re-program HT parameters */
1119 sdata->ht_opmode_valid = false;
1121 local->power_constr_level = 0;
1123 del_timer_sync(&local->dynamic_ps_timer);
1124 cancel_work_sync(&local->dynamic_ps_enable_work);
1126 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1127 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1128 config_changed |= IEEE80211_CONF_CHANGE_PS;
1130 local->ps_sdata = NULL;
1132 ieee80211_hw_config(local, config_changed);
1134 /* Disable ARP filtering */
1135 if (sdata->vif.bss_conf.arp_filter_enabled) {
1136 sdata->vif.bss_conf.arp_filter_enabled = false;
1137 changed |= BSS_CHANGED_ARP_FILTER;
1140 /* The BSSID (not really interesting) and HT changed */
1141 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1142 ieee80211_bss_info_change_notify(sdata, changed);
1144 /* remove AP and TDLS peers */
1146 sta_info_flush(local, sdata);
1148 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1149 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1150 del_timer_sync(&sdata->u.mgd.timer);
1151 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1154 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1155 struct ieee80211_hdr *hdr)
1158 * We can postpone the mgd.timer whenever receiving unicast frames
1159 * from AP because we know that the connection is working both ways
1160 * at that time. But multicast frames (and hence also beacons) must
1161 * be ignored here, because we need to trigger the timer during
1162 * data idle periods for sending the periodic probe request to the
1163 * AP we're connected to.
1165 if (is_multicast_ether_addr(hdr->addr1))
1168 ieee80211_sta_reset_conn_monitor(sdata);
1171 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1175 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1176 IEEE80211_STA_CONNECTION_POLL)))
1179 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1180 IEEE80211_STA_BEACON_POLL);
1181 mutex_lock(&sdata->local->iflist_mtx);
1182 ieee80211_recalc_ps(sdata->local, -1);
1183 mutex_unlock(&sdata->local->iflist_mtx);
1185 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1189 * We've received a probe response, but are not sure whether
1190 * we have or will be receiving any beacons or data, so let's
1191 * schedule the timers again, just in case.
1193 ieee80211_sta_reset_beacon_monitor(sdata);
1195 mod_timer(&ifmgd->conn_mon_timer,
1196 round_jiffies_up(jiffies +
1197 IEEE80211_CONNECTION_IDLE_TIME));
1200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1201 struct ieee80211_hdr *hdr, bool ack)
1203 if (!ieee80211_is_data(hdr->frame_control))
1207 ieee80211_sta_reset_conn_monitor(sdata);
1209 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1210 sdata->u.mgd.probe_send_count > 0) {
1212 sdata->u.mgd.probe_send_count = 0;
1214 sdata->u.mgd.nullfunc_failed = true;
1215 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1219 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1223 u8 *dst = ifmgd->associated->bssid;
1224 u8 unicast_limit = max(1, max_probe_tries - 3);
1227 * Try sending broadcast probe requests for the last three
1228 * probe requests after the first ones failed since some
1229 * buggy APs only support broadcast probe requests.
1231 if (ifmgd->probe_send_count >= unicast_limit)
1235 * When the hardware reports an accurate Tx ACK status, it's
1236 * better to send a nullfunc frame instead of a probe request,
1237 * as it will kick us off the AP quickly if we aren't associated
1238 * anymore. The timeout will be reset if the frame is ACKed by
1241 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1242 ifmgd->nullfunc_failed = false;
1243 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1245 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1246 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1247 (u32) -1, true, false);
1250 ifmgd->probe_send_count++;
1251 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1252 run_again(ifmgd, ifmgd->probe_timeout);
1255 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1259 bool already = false;
1261 if (!ieee80211_sdata_running(sdata))
1264 if (sdata->local->scanning)
1267 if (sdata->local->tmp_channel)
1270 mutex_lock(&ifmgd->mtx);
1272 if (!ifmgd->associated)
1275 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1276 if (beacon && net_ratelimit())
1277 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1278 "- sending probe request\n", sdata->name);
1282 * The driver/our work has already reported this event or the
1283 * connection monitoring has kicked in and we have already sent
1284 * a probe request. Or maybe the AP died and the driver keeps
1285 * reporting until we disassociate...
1287 * In either case we have to ignore the current call to this
1288 * function (except for setting the correct probe reason bit)
1289 * because otherwise we would reset the timer every time and
1290 * never check whether we received a probe response!
1292 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1293 IEEE80211_STA_CONNECTION_POLL))
1297 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1299 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1304 mutex_lock(&sdata->local->iflist_mtx);
1305 ieee80211_recalc_ps(sdata->local, -1);
1306 mutex_unlock(&sdata->local->iflist_mtx);
1308 ifmgd->probe_send_count = 0;
1309 ieee80211_mgd_probe_ap_send(sdata);
1311 mutex_unlock(&ifmgd->mtx);
1314 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1315 struct ieee80211_vif *vif)
1317 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1319 struct sk_buff *skb;
1322 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1325 ASSERT_MGD_MTX(ifmgd);
1327 if (!ifmgd->associated)
1330 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1331 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1332 (u32) -1, ssid + 2, ssid[1],
1337 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1339 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1342 struct ieee80211_local *local = sdata->local;
1345 mutex_lock(&ifmgd->mtx);
1346 if (!ifmgd->associated) {
1347 mutex_unlock(&ifmgd->mtx);
1351 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1353 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1354 sdata->name, bssid);
1356 ieee80211_set_disassoc(sdata, true, true);
1357 mutex_unlock(&ifmgd->mtx);
1359 mutex_lock(&local->mtx);
1360 ieee80211_recalc_idle(local);
1361 mutex_unlock(&local->mtx);
1363 * must be outside lock due to cfg80211,
1364 * but that's not a problem.
1366 ieee80211_send_deauth_disassoc(sdata, bssid,
1367 IEEE80211_STYPE_DEAUTH,
1368 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1372 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1374 struct ieee80211_sub_if_data *sdata =
1375 container_of(work, struct ieee80211_sub_if_data,
1376 u.mgd.beacon_connection_loss_work);
1378 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1379 __ieee80211_connection_loss(sdata);
1381 ieee80211_mgd_probe_ap(sdata, true);
1384 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1386 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1387 struct ieee80211_hw *hw = &sdata->local->hw;
1389 trace_api_beacon_loss(sdata);
1391 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1392 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1394 EXPORT_SYMBOL(ieee80211_beacon_loss);
1396 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1398 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1399 struct ieee80211_hw *hw = &sdata->local->hw;
1401 trace_api_connection_loss(sdata);
1403 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1404 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1406 EXPORT_SYMBOL(ieee80211_connection_loss);
1409 static enum rx_mgmt_action __must_check
1410 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1411 struct ieee80211_mgmt *mgmt, size_t len)
1413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1414 const u8 *bssid = NULL;
1418 return RX_MGMT_NONE;
1420 ASSERT_MGD_MTX(ifmgd);
1422 bssid = ifmgd->associated->bssid;
1424 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1426 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1427 sdata->name, bssid, reason_code);
1429 ieee80211_set_disassoc(sdata, true, false);
1430 mutex_lock(&sdata->local->mtx);
1431 ieee80211_recalc_idle(sdata->local);
1432 mutex_unlock(&sdata->local->mtx);
1434 return RX_MGMT_CFG80211_DEAUTH;
1438 static enum rx_mgmt_action __must_check
1439 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1440 struct ieee80211_mgmt *mgmt, size_t len)
1442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1446 return RX_MGMT_NONE;
1448 ASSERT_MGD_MTX(ifmgd);
1450 if (WARN_ON(!ifmgd->associated))
1451 return RX_MGMT_NONE;
1453 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1454 return RX_MGMT_NONE;
1456 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1458 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1459 sdata->name, mgmt->sa, reason_code);
1461 ieee80211_set_disassoc(sdata, true, false);
1462 mutex_lock(&sdata->local->mtx);
1463 ieee80211_recalc_idle(sdata->local);
1464 mutex_unlock(&sdata->local->mtx);
1465 return RX_MGMT_CFG80211_DISASSOC;
1469 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1470 struct ieee80211_mgmt *mgmt, size_t len)
1472 struct ieee80211_sub_if_data *sdata = wk->sdata;
1473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1474 struct ieee80211_local *local = sdata->local;
1475 struct ieee80211_supported_band *sband;
1476 struct sta_info *sta;
1477 struct cfg80211_bss *cbss = wk->assoc.bss;
1479 u32 rates, basic_rates;
1480 u16 capab_info, aid;
1481 struct ieee802_11_elems elems;
1482 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1485 bool have_higher_than_11mbit = false;
1486 u16 ap_ht_cap_flags;
1488 /* AssocResp and ReassocResp have identical structure */
1490 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1491 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1493 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1494 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1495 "set\n", sdata->name, aid);
1496 aid &= ~(BIT(15) | BIT(14));
1498 pos = mgmt->u.assoc_resp.variable;
1499 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1501 if (!elems.supp_rates) {
1502 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1509 mutex_lock(&sdata->local->sta_mtx);
1511 * station info was already allocated and inserted before
1512 * the association and should be available to us
1514 sta = sta_info_get_rx(sdata, cbss->bssid);
1515 if (WARN_ON(!sta)) {
1516 mutex_unlock(&sdata->local->sta_mtx);
1520 set_sta_flag(sta, WLAN_STA_AUTH);
1521 set_sta_flag(sta, WLAN_STA_ASSOC);
1522 set_sta_flag(sta, WLAN_STA_ASSOC_AP);
1523 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1524 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
1528 sband = local->hw.wiphy->bands[wk->chan->band];
1530 for (i = 0; i < elems.supp_rates_len; i++) {
1531 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1532 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1535 have_higher_than_11mbit = true;
1537 for (j = 0; j < sband->n_bitrates; j++) {
1538 if (sband->bitrates[j].bitrate == rate) {
1541 basic_rates |= BIT(j);
1547 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1548 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1549 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1552 have_higher_than_11mbit = true;
1554 for (j = 0; j < sband->n_bitrates; j++) {
1555 if (sband->bitrates[j].bitrate == rate) {
1558 basic_rates |= BIT(j);
1564 sta->sta.supp_rates[wk->chan->band] = rates;
1565 sdata->vif.bss_conf.basic_rates = basic_rates;
1567 /* cf. IEEE 802.11 9.2.12 */
1568 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
1569 have_higher_than_11mbit)
1570 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1572 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1574 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1575 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1576 elems.ht_cap_elem, &sta->sta.ht_cap);
1578 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1580 rate_control_rate_init(sta);
1582 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1583 set_sta_flag(sta, WLAN_STA_MFP);
1585 if (elems.wmm_param)
1586 set_sta_flag(sta, WLAN_STA_WME);
1588 /* sta_info_reinsert will also unlock the mutex lock */
1589 err = sta_info_reinsert(sta);
1592 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1593 " the AP (error %d)\n", sdata->name, err);
1598 * Always handle WMM once after association regardless
1599 * of the first value the AP uses. Setting -1 here has
1600 * that effect because the AP values is an unsigned
1603 ifmgd->wmm_last_param_set = -1;
1605 if (elems.wmm_param)
1606 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1607 elems.wmm_param_len);
1609 ieee80211_set_wmm_default(sdata);
1611 local->oper_channel = wk->chan;
1613 if (elems.ht_info_elem && elems.wmm_param &&
1614 (sdata->local->hw.queues >= 4) &&
1615 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1616 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1617 cbss->bssid, ap_ht_cap_flags,
1620 /* set AID and assoc capability,
1621 * ieee80211_set_associated() will tell the driver */
1622 bss_conf->aid = aid;
1623 bss_conf->assoc_capability = capab_info;
1624 ieee80211_set_associated(sdata, cbss, changed);
1627 * If we're using 4-addr mode, let the AP know that we're
1628 * doing so, so that it can create the STA VLAN on its side
1630 if (ifmgd->use_4addr)
1631 ieee80211_send_4addr_nullfunc(local, sdata);
1634 * Start timer to probe the connection to the AP now.
1635 * Also start the timer that will detect beacon loss.
1637 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1638 ieee80211_sta_reset_beacon_monitor(sdata);
1644 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1645 struct ieee80211_mgmt *mgmt,
1647 struct ieee80211_rx_status *rx_status,
1648 struct ieee802_11_elems *elems,
1651 struct ieee80211_local *local = sdata->local;
1653 struct ieee80211_bss *bss;
1654 struct ieee80211_channel *channel;
1655 bool need_ps = false;
1657 if (sdata->u.mgd.associated) {
1658 bss = (void *)sdata->u.mgd.associated->priv;
1659 /* not previously set so we may need to recalc */
1660 need_ps = !bss->dtim_period;
1663 if (elems->ds_params && elems->ds_params_len == 1)
1664 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1667 freq = rx_status->freq;
1669 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1671 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1674 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1677 ieee80211_rx_bss_put(local, bss);
1679 if (!sdata->u.mgd.associated)
1683 mutex_lock(&local->iflist_mtx);
1684 ieee80211_recalc_ps(local, -1);
1685 mutex_unlock(&local->iflist_mtx);
1688 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1689 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1691 struct ieee80211_channel_sw_ie *sw_elem =
1692 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1693 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1694 bss, rx_status->mactime);
1699 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1700 struct sk_buff *skb)
1702 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1703 struct ieee80211_if_managed *ifmgd;
1704 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1705 size_t baselen, len = skb->len;
1706 struct ieee802_11_elems elems;
1708 ifmgd = &sdata->u.mgd;
1710 ASSERT_MGD_MTX(ifmgd);
1712 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1713 return; /* ignore ProbeResp to foreign address */
1715 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1719 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1722 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1724 if (ifmgd->associated &&
1725 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1726 ieee80211_reset_ap_probe(sdata);
1730 * This is the canonical list of information elements we care about,
1731 * the filter code also gives us all changes to the Microsoft OUI
1732 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1734 * We implement beacon filtering in software since that means we can
1735 * avoid processing the frame here and in cfg80211, and userspace
1736 * will not be able to tell whether the hardware supports it or not.
1738 * XXX: This list needs to be dynamic -- userspace needs to be able to
1739 * add items it requires. It also needs to be able to tell us to
1740 * look out for other vendor IEs.
1742 static const u64 care_about_ies =
1743 (1ULL << WLAN_EID_COUNTRY) |
1744 (1ULL << WLAN_EID_ERP_INFO) |
1745 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1746 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1747 (1ULL << WLAN_EID_HT_CAPABILITY) |
1748 (1ULL << WLAN_EID_HT_INFORMATION);
1750 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1751 struct ieee80211_mgmt *mgmt,
1753 struct ieee80211_rx_status *rx_status)
1755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1756 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1758 struct ieee802_11_elems elems;
1759 struct ieee80211_local *local = sdata->local;
1761 bool erp_valid, directed_tim = false;
1766 ASSERT_MGD_MTX(ifmgd);
1768 /* Process beacon from the current BSS */
1769 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1773 if (rx_status->freq != local->hw.conf.channel->center_freq)
1777 * We might have received a number of frames, among them a
1778 * disassoc frame and a beacon...
1780 if (!ifmgd->associated)
1783 bssid = ifmgd->associated->bssid;
1786 * And in theory even frames from a different AP we were just
1787 * associated to a split-second ago!
1789 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1792 /* Track average RSSI from the Beacon frames of the current AP */
1793 ifmgd->last_beacon_signal = rx_status->signal;
1794 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1795 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1796 ifmgd->ave_beacon_signal = rx_status->signal * 16;
1797 ifmgd->last_cqm_event_signal = 0;
1798 ifmgd->count_beacon_signal = 1;
1799 ifmgd->last_ave_beacon_signal = 0;
1801 ifmgd->ave_beacon_signal =
1802 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1803 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1804 ifmgd->ave_beacon_signal) / 16;
1805 ifmgd->count_beacon_signal++;
1808 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1809 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1810 int sig = ifmgd->ave_beacon_signal;
1811 int last_sig = ifmgd->last_ave_beacon_signal;
1814 * if signal crosses either of the boundaries, invoke callback
1815 * with appropriate parameters
1817 if (sig > ifmgd->rssi_max_thold &&
1818 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1819 ifmgd->last_ave_beacon_signal = sig;
1820 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1821 } else if (sig < ifmgd->rssi_min_thold &&
1822 (last_sig >= ifmgd->rssi_max_thold ||
1824 ifmgd->last_ave_beacon_signal = sig;
1825 drv_rssi_callback(local, RSSI_EVENT_LOW);
1829 if (bss_conf->cqm_rssi_thold &&
1830 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
1831 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1832 int sig = ifmgd->ave_beacon_signal / 16;
1833 int last_event = ifmgd->last_cqm_event_signal;
1834 int thold = bss_conf->cqm_rssi_thold;
1835 int hyst = bss_conf->cqm_rssi_hyst;
1837 (last_event == 0 || sig < last_event - hyst)) {
1838 ifmgd->last_cqm_event_signal = sig;
1839 ieee80211_cqm_rssi_notify(
1841 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1843 } else if (sig > thold &&
1844 (last_event == 0 || sig > last_event + hyst)) {
1845 ifmgd->last_cqm_event_signal = sig;
1846 ieee80211_cqm_rssi_notify(
1848 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1853 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1854 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1855 if (net_ratelimit()) {
1856 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1857 "to a received beacon\n", sdata->name);
1860 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1861 mutex_lock(&local->iflist_mtx);
1862 ieee80211_recalc_ps(local, -1);
1863 mutex_unlock(&local->iflist_mtx);
1867 * Push the beacon loss detection into the future since
1868 * we are processing a beacon from the AP just now.
1870 ieee80211_sta_reset_beacon_monitor(sdata);
1872 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1873 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1874 len - baselen, &elems,
1875 care_about_ies, ncrc);
1877 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1878 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1881 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
1882 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1885 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1886 elems.wmm_param_len);
1889 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1891 if (local->hw.conf.dynamic_ps_timeout > 0) {
1892 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1893 ieee80211_hw_config(local,
1894 IEEE80211_CONF_CHANGE_PS);
1895 ieee80211_send_nullfunc(local, sdata, 0);
1897 local->pspolling = true;
1900 * Here is assumed that the driver will be
1901 * able to send ps-poll frame and receive a
1902 * response even though power save mode is
1903 * enabled, but some drivers might require
1904 * to disable power save here. This needs
1905 * to be investigated.
1907 ieee80211_send_pspoll(local, sdata);
1912 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
1914 ifmgd->beacon_crc = ncrc;
1915 ifmgd->beacon_crc_valid = true;
1917 if (elems.erp_info && elems.erp_info_len >= 1) {
1919 erp_value = elems.erp_info[0];
1923 changed |= ieee80211_handle_bss_capability(sdata,
1924 le16_to_cpu(mgmt->u.beacon.capab_info),
1925 erp_valid, erp_value);
1928 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1929 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1930 struct sta_info *sta;
1931 struct ieee80211_supported_band *sband;
1932 u16 ap_ht_cap_flags;
1936 sta = sta_info_get(sdata, bssid);
1937 if (WARN_ON(!sta)) {
1942 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1944 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1945 elems.ht_cap_elem, &sta->sta.ht_cap);
1947 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1951 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1952 bssid, ap_ht_cap_flags, true);
1955 /* Note: country IE parsing is done for us by cfg80211 */
1956 if (elems.country_elem) {
1957 /* TODO: IBSS also needs this */
1958 if (elems.pwr_constr_elem)
1959 ieee80211_handle_pwr_constr(sdata,
1960 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1961 elems.pwr_constr_elem,
1962 elems.pwr_constr_elem_len);
1965 ieee80211_bss_info_change_notify(sdata, changed);
1968 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1969 struct sk_buff *skb)
1971 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1972 struct ieee80211_rx_status *rx_status;
1973 struct ieee80211_mgmt *mgmt;
1974 enum rx_mgmt_action rma = RX_MGMT_NONE;
1977 rx_status = (struct ieee80211_rx_status *) skb->cb;
1978 mgmt = (struct ieee80211_mgmt *) skb->data;
1979 fc = le16_to_cpu(mgmt->frame_control);
1981 mutex_lock(&ifmgd->mtx);
1983 if (ifmgd->associated &&
1984 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1985 switch (fc & IEEE80211_FCTL_STYPE) {
1986 case IEEE80211_STYPE_BEACON:
1987 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1990 case IEEE80211_STYPE_PROBE_RESP:
1991 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1993 case IEEE80211_STYPE_DEAUTH:
1994 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1996 case IEEE80211_STYPE_DISASSOC:
1997 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1999 case IEEE80211_STYPE_ACTION:
2000 switch (mgmt->u.action.category) {
2001 case WLAN_CATEGORY_SPECTRUM_MGMT:
2002 ieee80211_sta_process_chanswitch(sdata,
2003 &mgmt->u.action.u.chan_switch.sw_elem,
2004 (void *)ifmgd->associated->priv,
2005 rx_status->mactime);
2009 mutex_unlock(&ifmgd->mtx);
2015 case RX_MGMT_CFG80211_DEAUTH:
2016 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2018 case RX_MGMT_CFG80211_DISASSOC:
2019 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2022 WARN(1, "unexpected: %d", rma);
2027 mutex_unlock(&ifmgd->mtx);
2029 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2030 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2031 struct ieee80211_local *local = sdata->local;
2032 struct ieee80211_work *wk;
2034 mutex_lock(&local->mtx);
2035 list_for_each_entry(wk, &local->work_list, list) {
2036 if (wk->sdata != sdata)
2039 if (wk->type != IEEE80211_WORK_ASSOC &&
2040 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2043 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2045 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2049 * Printing the message only here means we can't
2050 * spuriously print it, but it also means that it
2051 * won't be printed when the frame comes in before
2052 * we even tried to associate or in similar cases.
2054 * Ultimately, I suspect cfg80211 should print the
2058 "%s: deauthenticated from %pM (Reason: %u)\n",
2059 sdata->name, mgmt->bssid,
2060 le16_to_cpu(mgmt->u.deauth.reason_code));
2062 list_del_rcu(&wk->list);
2066 mutex_unlock(&local->mtx);
2068 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2072 static void ieee80211_sta_timer(unsigned long data)
2074 struct ieee80211_sub_if_data *sdata =
2075 (struct ieee80211_sub_if_data *) data;
2076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2077 struct ieee80211_local *local = sdata->local;
2079 if (local->quiescing) {
2080 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2084 ieee80211_queue_work(&local->hw, &sdata->work);
2087 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2088 u8 *bssid, u8 reason)
2090 struct ieee80211_local *local = sdata->local;
2091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2093 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2094 IEEE80211_STA_BEACON_POLL);
2096 ieee80211_set_disassoc(sdata, true, true);
2097 mutex_unlock(&ifmgd->mtx);
2098 mutex_lock(&local->mtx);
2099 ieee80211_recalc_idle(local);
2100 mutex_unlock(&local->mtx);
2102 * must be outside lock due to cfg80211,
2103 * but that's not a problem.
2105 ieee80211_send_deauth_disassoc(sdata, bssid,
2106 IEEE80211_STYPE_DEAUTH, reason,
2108 mutex_lock(&ifmgd->mtx);
2111 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2113 struct ieee80211_local *local = sdata->local;
2114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2116 /* then process the rest of the work */
2117 mutex_lock(&ifmgd->mtx);
2119 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2120 IEEE80211_STA_CONNECTION_POLL) &&
2121 ifmgd->associated) {
2125 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2127 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2128 max_tries = max_nullfunc_tries;
2130 max_tries = max_probe_tries;
2132 /* ACK received for nullfunc probing frame */
2133 if (!ifmgd->probe_send_count)
2134 ieee80211_reset_ap_probe(sdata);
2135 else if (ifmgd->nullfunc_failed) {
2136 if (ifmgd->probe_send_count < max_tries) {
2137 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2138 wiphy_debug(local->hw.wiphy,
2139 "%s: No ack for nullfunc frame to"
2140 " AP %pM, try %d/%i\n",
2142 ifmgd->probe_send_count, max_tries);
2144 ieee80211_mgd_probe_ap_send(sdata);
2146 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2147 wiphy_debug(local->hw.wiphy,
2148 "%s: No ack for nullfunc frame to"
2149 " AP %pM, disconnecting.\n",
2150 sdata->name, bssid);
2152 ieee80211_sta_connection_lost(sdata, bssid,
2153 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2155 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2156 run_again(ifmgd, ifmgd->probe_timeout);
2157 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2159 wiphy_debug(local->hw.wiphy,
2160 "%s: Failed to send nullfunc to AP %pM"
2161 " after %dms, disconnecting.\n",
2163 bssid, probe_wait_ms);
2165 ieee80211_sta_connection_lost(sdata, bssid,
2166 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2167 } else if (ifmgd->probe_send_count < max_tries) {
2168 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2169 wiphy_debug(local->hw.wiphy,
2170 "%s: No probe response from AP %pM"
2171 " after %dms, try %d/%i\n",
2173 bssid, probe_wait_ms,
2174 ifmgd->probe_send_count, max_tries);
2176 ieee80211_mgd_probe_ap_send(sdata);
2179 * We actually lost the connection ... or did we?
2182 wiphy_debug(local->hw.wiphy,
2183 "%s: No probe response from AP %pM"
2184 " after %dms, disconnecting.\n",
2186 bssid, probe_wait_ms);
2188 ieee80211_sta_connection_lost(sdata, bssid,
2189 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2193 mutex_unlock(&ifmgd->mtx);
2196 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2198 struct ieee80211_sub_if_data *sdata =
2199 (struct ieee80211_sub_if_data *) data;
2200 struct ieee80211_local *local = sdata->local;
2202 if (local->quiescing)
2205 ieee80211_queue_work(&sdata->local->hw,
2206 &sdata->u.mgd.beacon_connection_loss_work);
2209 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2211 struct ieee80211_sub_if_data *sdata =
2212 (struct ieee80211_sub_if_data *) data;
2213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2214 struct ieee80211_local *local = sdata->local;
2216 if (local->quiescing)
2219 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2222 static void ieee80211_sta_monitor_work(struct work_struct *work)
2224 struct ieee80211_sub_if_data *sdata =
2225 container_of(work, struct ieee80211_sub_if_data,
2226 u.mgd.monitor_work);
2228 ieee80211_mgd_probe_ap(sdata, false);
2231 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2233 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2234 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2235 IEEE80211_STA_CONNECTION_POLL);
2237 /* let's probe the connection once */
2238 ieee80211_queue_work(&sdata->local->hw,
2239 &sdata->u.mgd.monitor_work);
2240 /* and do all the other regular work too */
2241 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2246 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2251 * we need to use atomic bitops for the running bits
2252 * only because both timers might fire at the same
2253 * time -- the code here is properly synchronised.
2256 cancel_work_sync(&ifmgd->request_smps_work);
2258 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2259 if (del_timer_sync(&ifmgd->timer))
2260 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2262 cancel_work_sync(&ifmgd->chswitch_work);
2263 if (del_timer_sync(&ifmgd->chswitch_timer))
2264 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2266 cancel_work_sync(&ifmgd->monitor_work);
2267 /* these will just be re-established on connection */
2268 del_timer_sync(&ifmgd->conn_mon_timer);
2269 del_timer_sync(&ifmgd->bcn_mon_timer);
2272 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2276 if (!ifmgd->associated)
2279 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2280 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2281 mutex_lock(&ifmgd->mtx);
2282 if (ifmgd->associated) {
2283 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2284 wiphy_debug(sdata->local->hw.wiphy,
2285 "%s: driver requested disconnect after resume.\n",
2288 ieee80211_sta_connection_lost(sdata,
2289 ifmgd->associated->bssid,
2290 WLAN_REASON_UNSPECIFIED);
2291 mutex_unlock(&ifmgd->mtx);
2294 mutex_unlock(&ifmgd->mtx);
2297 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2298 add_timer(&ifmgd->timer);
2299 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2300 add_timer(&ifmgd->chswitch_timer);
2301 ieee80211_sta_reset_beacon_monitor(sdata);
2302 ieee80211_restart_sta_timer(sdata);
2303 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
2307 /* interface setup */
2308 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2310 struct ieee80211_if_managed *ifmgd;
2312 ifmgd = &sdata->u.mgd;
2313 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2314 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2315 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2316 ieee80211_beacon_connection_loss_work);
2317 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2318 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2319 (unsigned long) sdata);
2320 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2321 (unsigned long) sdata);
2322 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2323 (unsigned long) sdata);
2324 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2325 (unsigned long) sdata);
2329 mutex_init(&ifmgd->mtx);
2331 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2332 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2334 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2337 /* scan finished notification */
2338 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2340 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2342 /* Restart STA timers */
2344 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2345 ieee80211_restart_sta_timer(sdata);
2349 int ieee80211_max_network_latency(struct notifier_block *nb,
2350 unsigned long data, void *dummy)
2352 s32 latency_usec = (s32) data;
2353 struct ieee80211_local *local =
2354 container_of(nb, struct ieee80211_local,
2355 network_latency_notifier);
2357 mutex_lock(&local->iflist_mtx);
2358 ieee80211_recalc_ps(local, latency_usec);
2359 mutex_unlock(&local->iflist_mtx);
2365 static enum work_done_result
2366 ieee80211_probe_auth_done(struct ieee80211_work *wk,
2367 struct sk_buff *skb)
2369 struct ieee80211_local *local = wk->sdata->local;
2372 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2376 if (wk->type == IEEE80211_WORK_AUTH) {
2377 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2381 mutex_lock(&wk->sdata->u.mgd.mtx);
2382 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2383 mutex_unlock(&wk->sdata->u.mgd.mtx);
2385 wk->type = IEEE80211_WORK_AUTH;
2386 wk->probe_auth.tries = 0;
2387 return WORK_DONE_REQUEUE;
2389 if (wk->probe_auth.synced)
2390 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2391 IEEE80211_TX_SYNC_AUTH);
2393 return WORK_DONE_DESTROY;
2396 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2397 struct cfg80211_auth_request *req)
2400 struct ieee80211_work *wk;
2403 if (req->local_state_change)
2404 return 0; /* no need to update mac80211 state */
2406 switch (req->auth_type) {
2407 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2408 auth_alg = WLAN_AUTH_OPEN;
2410 case NL80211_AUTHTYPE_SHARED_KEY:
2411 if (IS_ERR(sdata->local->wep_tx_tfm))
2413 auth_alg = WLAN_AUTH_SHARED_KEY;
2415 case NL80211_AUTHTYPE_FT:
2416 auth_alg = WLAN_AUTH_FT;
2418 case NL80211_AUTHTYPE_NETWORK_EAP:
2419 auth_alg = WLAN_AUTH_LEAP;
2425 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2429 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2431 if (req->ie && req->ie_len) {
2432 memcpy(wk->ie, req->ie, req->ie_len);
2433 wk->ie_len = req->ie_len;
2436 if (req->key && req->key_len) {
2437 wk->probe_auth.key_len = req->key_len;
2438 wk->probe_auth.key_idx = req->key_idx;
2439 memcpy(wk->probe_auth.key, req->key, req->key_len);
2442 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2443 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2444 wk->probe_auth.ssid_len = ssid[1];
2446 wk->probe_auth.algorithm = auth_alg;
2447 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
2449 /* if we already have a probe, don't probe again */
2450 if (req->bss->proberesp_ies)
2451 wk->type = IEEE80211_WORK_AUTH;
2453 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2454 wk->chan = req->bss->channel;
2455 wk->chan_type = NL80211_CHAN_NO_HT;
2457 wk->done = ieee80211_probe_auth_done;
2459 ieee80211_add_work(wk);
2463 /* create and insert a dummy station entry */
2464 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2466 struct sta_info *sta;
2469 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
2475 err = sta_info_insert(sta);
2478 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2479 " the AP (error %d)\n", sdata->name, err);
2486 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2487 struct sk_buff *skb)
2489 struct ieee80211_local *local = wk->sdata->local;
2490 struct ieee80211_mgmt *mgmt;
2491 struct ieee80211_rx_status *rx_status;
2492 struct ieee802_11_elems elems;
2493 struct cfg80211_bss *cbss = wk->assoc.bss;
2497 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2498 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2502 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2503 mutex_lock(&wk->sdata->u.mgd.mtx);
2504 rx_status = (void *) skb->cb;
2505 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2506 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2508 mutex_unlock(&wk->sdata->u.mgd.mtx);
2510 wk->type = IEEE80211_WORK_ASSOC;
2511 /* not really done yet */
2512 return WORK_DONE_REQUEUE;
2515 mgmt = (void *)skb->data;
2516 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2518 if (status == WLAN_STATUS_SUCCESS) {
2519 if (wk->assoc.synced)
2520 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2521 IEEE80211_TX_SYNC_ASSOC);
2523 mutex_lock(&wk->sdata->u.mgd.mtx);
2524 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2525 mutex_unlock(&wk->sdata->u.mgd.mtx);
2526 /* oops -- internal error -- send timeout for now */
2527 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2528 cfg80211_send_assoc_timeout(wk->sdata->dev,
2530 return WORK_DONE_DESTROY;
2533 mutex_unlock(&wk->sdata->u.mgd.mtx);
2535 /* assoc failed - destroy the dummy station entry */
2536 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2539 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2541 if (wk->assoc.synced)
2542 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2543 IEEE80211_TX_SYNC_ASSOC);
2545 return WORK_DONE_DESTROY;
2548 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2549 struct cfg80211_assoc_request *req)
2551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2552 struct ieee80211_bss *bss = (void *)req->bss->priv;
2553 struct ieee80211_work *wk;
2557 mutex_lock(&ifmgd->mtx);
2558 if (ifmgd->associated) {
2559 if (!req->prev_bssid ||
2560 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2563 * We are already associated and the request was not a
2564 * reassociation request from the current BSS, so
2567 mutex_unlock(&ifmgd->mtx);
2571 /* Trying to reassociate - clear previous association state */
2572 ieee80211_set_disassoc(sdata, true, false);
2574 mutex_unlock(&ifmgd->mtx);
2576 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2581 * create a dummy station info entry in order
2582 * to start accepting incoming EAPOL packets from the station
2584 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2590 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2591 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2593 ifmgd->beacon_crc_valid = false;
2595 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2596 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2597 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2598 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2599 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2602 if (req->ie && req->ie_len) {
2603 memcpy(wk->ie, req->ie, req->ie_len);
2604 wk->ie_len = req->ie_len;
2608 wk->assoc.bss = req->bss;
2610 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2612 /* new association always uses requested smps mode */
2613 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2614 if (ifmgd->powersave)
2615 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2617 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2619 ifmgd->ap_smps = ifmgd->req_smps;
2621 wk->assoc.smps = ifmgd->ap_smps;
2623 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2624 * We still associate in non-HT mode (11a/b/g) if any one of these
2625 * ciphers is configured as pairwise.
2626 * We can set this to true for non-11n hardware, that'll be checked
2627 * separately along with the peer capabilities.
2629 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2630 wk->assoc.capability = req->bss->capability;
2631 wk->assoc.wmm_used = bss->wmm_used;
2632 wk->assoc.supp_rates = bss->supp_rates;
2633 wk->assoc.supp_rates_len = bss->supp_rates_len;
2634 wk->assoc.ht_information_ie =
2635 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2637 if (bss->wmm_used && bss->uapsd_supported &&
2638 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2639 wk->assoc.uapsd_used = true;
2640 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2642 wk->assoc.uapsd_used = false;
2643 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2646 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2647 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2648 wk->assoc.ssid_len = ssid[1];
2650 if (req->prev_bssid)
2651 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2653 wk->chan = req->bss->channel;
2654 wk->chan_type = NL80211_CHAN_NO_HT;
2656 wk->done = ieee80211_assoc_done;
2657 if (!bss->dtim_period &&
2658 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2659 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2661 wk->type = IEEE80211_WORK_ASSOC;
2664 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2665 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2667 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2668 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2671 if (req->crypto.control_port)
2672 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2674 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2676 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2677 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2679 ieee80211_add_work(wk);
2683 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2684 struct cfg80211_deauth_request *req,
2687 struct ieee80211_local *local = sdata->local;
2688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2689 struct ieee80211_work *wk;
2691 bool assoc_bss = false;
2693 mutex_lock(&ifmgd->mtx);
2695 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2696 if (ifmgd->associated == req->bss) {
2697 ieee80211_set_disassoc(sdata, false, true);
2698 mutex_unlock(&ifmgd->mtx);
2701 bool not_auth_yet = false;
2703 mutex_unlock(&ifmgd->mtx);
2705 mutex_lock(&local->mtx);
2706 list_for_each_entry(wk, &local->work_list, list) {
2707 if (wk->sdata != sdata)
2710 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2711 wk->type != IEEE80211_WORK_AUTH &&
2712 wk->type != IEEE80211_WORK_ASSOC &&
2713 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2716 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2719 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2720 list_del_rcu(&wk->list);
2724 mutex_unlock(&local->mtx);
2727 * If somebody requests authentication and we haven't
2728 * sent out an auth frame yet there's no need to send
2729 * out a deauth frame either. If the state was PROBE,
2730 * then this is the case. If it's AUTH we have sent a
2731 * frame, and if it's IDLE we have completed the auth
2735 __cfg80211_auth_canceled(sdata->dev, bssid);
2740 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2741 sdata->name, bssid, req->reason_code);
2743 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2744 req->reason_code, cookie,
2745 !req->local_state_change);
2747 sta_info_flush(sdata->local, sdata);
2749 mutex_lock(&sdata->local->mtx);
2750 ieee80211_recalc_idle(sdata->local);
2751 mutex_unlock(&sdata->local->mtx);
2756 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2757 struct cfg80211_disassoc_request *req,
2760 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2763 mutex_lock(&ifmgd->mtx);
2766 * cfg80211 should catch this ... but it's racy since
2767 * we can receive a disassoc frame, process it, hand it
2768 * to cfg80211 while that's in a locked section already
2769 * trying to tell us that the user wants to disconnect.
2771 if (ifmgd->associated != req->bss) {
2772 mutex_unlock(&ifmgd->mtx);
2776 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2777 sdata->name, req->bss->bssid, req->reason_code);
2779 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2780 ieee80211_set_disassoc(sdata, false, true);
2782 mutex_unlock(&ifmgd->mtx);
2784 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2785 IEEE80211_STYPE_DISASSOC, req->reason_code,
2786 cookie, !req->local_state_change);
2787 sta_info_flush(sdata->local, sdata);
2789 mutex_lock(&sdata->local->mtx);
2790 ieee80211_recalc_idle(sdata->local);
2791 mutex_unlock(&sdata->local->mtx);
2796 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2797 enum nl80211_cqm_rssi_threshold_event rssi_event,
2800 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2802 trace_api_cqm_rssi_notify(sdata, rssi_event);
2804 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2806 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
2808 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2810 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2811 return sdata->dev->operstate;
2813 EXPORT_SYMBOL(ieee80211_get_operstate);