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_params.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;
352 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
356 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
358 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
360 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
361 ieee80211_tx_skb(sdata, skb);
364 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
365 struct ieee80211_sub_if_data *sdata)
368 struct ieee80211_hdr *nullfunc;
371 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
374 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
378 skb_reserve(skb, local->hw.extra_tx_headroom);
380 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
381 memset(nullfunc, 0, 30);
382 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
383 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
384 nullfunc->frame_control = fc;
385 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
386 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
387 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
388 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
390 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
391 ieee80211_tx_skb(sdata, skb);
394 /* spectrum management related things */
395 static void ieee80211_chswitch_work(struct work_struct *work)
397 struct ieee80211_sub_if_data *sdata =
398 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
401 if (!ieee80211_sdata_running(sdata))
404 mutex_lock(&ifmgd->mtx);
405 if (!ifmgd->associated)
408 sdata->local->oper_channel = sdata->local->csa_channel;
409 if (!sdata->local->ops->channel_switch) {
410 /* call "hw_config" only if doing sw channel switch */
411 ieee80211_hw_config(sdata->local,
412 IEEE80211_CONF_CHANGE_CHANNEL);
414 /* update the device channel directly */
415 sdata->local->hw.conf.channel = sdata->local->oper_channel;
418 /* XXX: shouldn't really modify cfg80211-owned data! */
419 ifmgd->associated->channel = sdata->local->oper_channel;
421 ieee80211_wake_queues_by_reason(&sdata->local->hw,
422 IEEE80211_QUEUE_STOP_REASON_CSA);
424 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
425 mutex_unlock(&ifmgd->mtx);
428 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
430 struct ieee80211_sub_if_data *sdata;
431 struct ieee80211_if_managed *ifmgd;
433 sdata = vif_to_sdata(vif);
434 ifmgd = &sdata->u.mgd;
436 trace_api_chswitch_done(sdata, success);
439 * If the channel switch was not successful, stay
440 * around on the old channel. We currently lack
441 * good handling of this situation, possibly we
442 * should just drop the association.
444 sdata->local->csa_channel = sdata->local->oper_channel;
447 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
449 EXPORT_SYMBOL(ieee80211_chswitch_done);
451 static void ieee80211_chswitch_timer(unsigned long data)
453 struct ieee80211_sub_if_data *sdata =
454 (struct ieee80211_sub_if_data *) data;
455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
457 if (sdata->local->quiescing) {
458 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
462 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
465 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
466 struct ieee80211_channel_sw_ie *sw_elem,
467 struct ieee80211_bss *bss,
470 struct cfg80211_bss *cbss =
471 container_of((void *)bss, struct cfg80211_bss, priv);
472 struct ieee80211_channel *new_ch;
473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
474 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
475 cbss->channel->band);
477 ASSERT_MGD_MTX(ifmgd);
479 if (!ifmgd->associated)
482 if (sdata->local->scanning)
485 /* Disregard subsequent beacons if we are already running a timer
488 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
491 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
492 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
495 sdata->local->csa_channel = new_ch;
497 if (sdata->local->ops->channel_switch) {
498 /* use driver's channel switch callback */
499 struct ieee80211_channel_switch ch_switch;
500 memset(&ch_switch, 0, sizeof(ch_switch));
501 ch_switch.timestamp = timestamp;
503 ch_switch.block_tx = true;
504 ieee80211_stop_queues_by_reason(&sdata->local->hw,
505 IEEE80211_QUEUE_STOP_REASON_CSA);
507 ch_switch.channel = new_ch;
508 ch_switch.count = sw_elem->count;
509 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
510 drv_channel_switch(sdata->local, &ch_switch);
514 /* channel switch handled in software */
515 if (sw_elem->count <= 1) {
516 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
519 ieee80211_stop_queues_by_reason(&sdata->local->hw,
520 IEEE80211_QUEUE_STOP_REASON_CSA);
521 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
522 mod_timer(&ifmgd->chswitch_timer,
524 msecs_to_jiffies(sw_elem->count *
525 cbss->beacon_interval));
529 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
530 u16 capab_info, u8 *pwr_constr_elem,
531 u8 pwr_constr_elem_len)
533 struct ieee80211_conf *conf = &sdata->local->hw.conf;
535 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
538 /* Power constraint IE length should be 1 octet */
539 if (pwr_constr_elem_len != 1)
542 if ((*pwr_constr_elem <= conf->channel->max_power) &&
543 (*pwr_constr_elem != sdata->local->power_constr_level)) {
544 sdata->local->power_constr_level = *pwr_constr_elem;
545 ieee80211_hw_config(sdata->local, 0);
549 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
551 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
552 struct ieee80211_local *local = sdata->local;
553 struct ieee80211_conf *conf = &local->hw.conf;
555 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
556 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
557 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
559 local->disable_dynamic_ps = false;
560 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
562 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
564 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
566 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
567 struct ieee80211_local *local = sdata->local;
568 struct ieee80211_conf *conf = &local->hw.conf;
570 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
571 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
572 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
574 local->disable_dynamic_ps = true;
575 conf->dynamic_ps_timeout = 0;
576 del_timer_sync(&local->dynamic_ps_timer);
577 ieee80211_queue_work(&local->hw,
578 &local->dynamic_ps_enable_work);
580 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
583 static void ieee80211_enable_ps(struct ieee80211_local *local,
584 struct ieee80211_sub_if_data *sdata)
586 struct ieee80211_conf *conf = &local->hw.conf;
589 * If we are scanning right now then the parameters will
590 * take effect when scan finishes.
595 if (conf->dynamic_ps_timeout > 0 &&
596 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
597 mod_timer(&local->dynamic_ps_timer, jiffies +
598 msecs_to_jiffies(conf->dynamic_ps_timeout));
600 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
601 ieee80211_send_nullfunc(local, sdata, 1);
603 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
604 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
607 conf->flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
612 static void ieee80211_change_ps(struct ieee80211_local *local)
614 struct ieee80211_conf *conf = &local->hw.conf;
616 if (local->ps_sdata) {
617 ieee80211_enable_ps(local, local->ps_sdata);
618 } else if (conf->flags & IEEE80211_CONF_PS) {
619 conf->flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 del_timer_sync(&local->dynamic_ps_timer);
622 cancel_work_sync(&local->dynamic_ps_enable_work);
626 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
628 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
629 struct sta_info *sta = NULL;
635 if (!mgd->associated)
638 if (!mgd->associated->beacon_ies)
641 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
642 IEEE80211_STA_CONNECTION_POLL))
646 sta = sta_info_get(sdata, mgd->bssid);
648 sta_flags = get_sta_flags(sta);
651 if (!(sta_flags & WLAN_STA_AUTHORIZED))
657 /* need to hold RTNL or interface lock */
658 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
660 struct ieee80211_sub_if_data *sdata, *found = NULL;
664 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
665 local->ps_sdata = NULL;
669 if (!list_empty(&local->work_list)) {
670 local->ps_sdata = NULL;
674 list_for_each_entry(sdata, &local->interfaces, list) {
675 if (!ieee80211_sdata_running(sdata))
677 if (sdata->vif.type == NL80211_IFTYPE_AP) {
678 /* If an AP vif is found, then disable PS
679 * by setting the count to zero thereby setting
685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
691 if (count == 1 && ieee80211_powersave_allowed(found)) {
692 struct ieee80211_conf *conf = &local->hw.conf;
696 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
698 beaconint_us = ieee80211_tu_to_usec(
699 found->vif.bss_conf.beacon_int);
701 timeout = local->dynamic_ps_forced_timeout;
704 * Go to full PSM if the user configures a very low
705 * latency requirement.
706 * The 2000 second value is there for compatibility
707 * until the PM_QOS_NETWORK_LATENCY is configured
710 if (latency > (1900 * USEC_PER_MSEC) &&
711 latency != (2000 * USEC_PER_SEC))
716 local->dynamic_ps_user_timeout = timeout;
717 if (!local->disable_dynamic_ps)
718 conf->dynamic_ps_timeout =
719 local->dynamic_ps_user_timeout;
721 if (beaconint_us > latency) {
722 local->ps_sdata = NULL;
724 struct ieee80211_bss *bss;
728 bss = (void *)found->u.mgd.associated->priv;
729 dtimper = bss->dtim_period;
731 /* If the TIM IE is invalid, pretend the value is 1 */
734 else if (dtimper > 1)
735 maxslp = min_t(int, dtimper,
736 latency / beaconint_us);
738 local->hw.conf.max_sleep_period = maxslp;
739 local->hw.conf.ps_dtim_period = dtimper;
740 local->ps_sdata = found;
743 local->ps_sdata = NULL;
747 ieee80211_change_ps(local);
750 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
752 struct ieee80211_local *local =
753 container_of(work, struct ieee80211_local,
754 dynamic_ps_disable_work);
756 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
757 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
758 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
761 ieee80211_wake_queues_by_reason(&local->hw,
762 IEEE80211_QUEUE_STOP_REASON_PS);
765 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
767 struct ieee80211_local *local =
768 container_of(work, struct ieee80211_local,
769 dynamic_ps_enable_work);
770 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
771 struct ieee80211_if_managed *ifmgd;
775 /* can only happen when PS was just disabled anyway */
779 ifmgd = &sdata->u.mgd;
781 if (local->hw.conf.flags & IEEE80211_CONF_PS)
784 if (!local->disable_dynamic_ps &&
785 local->hw.conf.dynamic_ps_timeout > 0) {
786 /* don't enter PS if TX frames are pending */
787 if (drv_tx_frames_pending(local)) {
788 mod_timer(&local->dynamic_ps_timer, jiffies +
790 local->hw.conf.dynamic_ps_timeout));
795 * transmission can be stopped by others which leads to
796 * dynamic_ps_timer expiry. Postpone the ps timer if it
797 * is not the actual idle state.
799 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
800 for (q = 0; q < local->hw.queues; q++) {
801 if (local->queue_stop_reasons[q]) {
802 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
804 mod_timer(&local->dynamic_ps_timer, jiffies +
806 local->hw.conf.dynamic_ps_timeout));
810 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
813 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
814 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
815 netif_tx_stop_all_queues(sdata->dev);
817 if (drv_tx_frames_pending(local))
818 mod_timer(&local->dynamic_ps_timer, jiffies +
820 local->hw.conf.dynamic_ps_timeout));
822 ieee80211_send_nullfunc(local, sdata, 1);
823 /* Flush to get the tx status of nullfunc frame */
824 drv_flush(local, false);
828 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
829 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
830 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
831 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
832 local->hw.conf.flags |= IEEE80211_CONF_PS;
833 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
836 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
837 netif_tx_wake_all_queues(sdata->dev);
840 void ieee80211_dynamic_ps_timer(unsigned long data)
842 struct ieee80211_local *local = (void *) data;
844 if (local->quiescing || local->suspended)
847 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
851 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
852 struct ieee80211_sub_if_data *sdata,
853 u8 *wmm_param, size_t wmm_param_len)
855 struct ieee80211_tx_queue_params params;
856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
859 u8 *pos, uapsd_queues = 0;
861 if (!local->ops->conf_tx)
864 if (local->hw.queues < 4)
870 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
873 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
874 uapsd_queues = local->uapsd_queues;
876 count = wmm_param[6] & 0x0f;
877 if (count == ifmgd->wmm_last_param_set)
879 ifmgd->wmm_last_param_set = count;
882 left = wmm_param_len - 8;
884 memset(¶ms, 0, sizeof(params));
887 for (; left >= 4; left -= 4, pos += 4) {
888 int aci = (pos[0] >> 5) & 0x03;
889 int acm = (pos[0] >> 4) & 0x01;
897 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
898 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
904 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
905 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
911 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
919 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
925 params.aifs = pos[0] & 0x0f;
926 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
927 params.cw_min = ecw2cw(pos[1] & 0x0f);
928 params.txop = get_unaligned_le16(pos + 2);
929 params.uapsd = uapsd;
931 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
932 wiphy_debug(local->hw.wiphy,
933 "WMM queue=%d aci=%d acm=%d aifs=%d "
934 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
936 params.aifs, params.cw_min, params.cw_max,
937 params.txop, params.uapsd);
939 sdata->tx_conf[queue] = params;
940 if (drv_conf_tx(local, sdata, queue, ¶ms))
941 wiphy_debug(local->hw.wiphy,
942 "failed to set TX queue parameters for queue %d\n",
946 /* enable WMM or activate new settings */
947 sdata->vif.bss_conf.qos = true;
948 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
951 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
952 u16 capab, bool erp_valid, u8 erp)
954 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
957 bool use_short_preamble;
961 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
962 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
964 use_protection = false;
965 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
968 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
969 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
970 use_short_slot = true;
972 if (use_protection != bss_conf->use_cts_prot) {
973 bss_conf->use_cts_prot = use_protection;
974 changed |= BSS_CHANGED_ERP_CTS_PROT;
977 if (use_short_preamble != bss_conf->use_short_preamble) {
978 bss_conf->use_short_preamble = use_short_preamble;
979 changed |= BSS_CHANGED_ERP_PREAMBLE;
982 if (use_short_slot != bss_conf->use_short_slot) {
983 bss_conf->use_short_slot = use_short_slot;
984 changed |= BSS_CHANGED_ERP_SLOT;
990 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
991 struct cfg80211_bss *cbss,
992 u32 bss_info_changed)
994 struct ieee80211_bss *bss = (void *)cbss->priv;
995 struct ieee80211_local *local = sdata->local;
996 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
998 bss_info_changed |= BSS_CHANGED_ASSOC;
999 /* set timing information */
1000 bss_conf->beacon_int = cbss->beacon_interval;
1001 bss_conf->timestamp = cbss->tsf;
1003 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1004 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1005 cbss->capability, bss->has_erp_value, bss->erp_value);
1007 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1008 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1010 sdata->u.mgd.associated = cbss;
1011 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1013 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1015 /* just to be sure */
1016 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1017 IEEE80211_STA_BEACON_POLL);
1019 ieee80211_led_assoc(local, 1);
1021 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1022 bss_conf->dtim_period = bss->dtim_period;
1024 bss_conf->dtim_period = 0;
1026 bss_conf->assoc = 1;
1028 * For now just always ask the driver to update the basic rateset
1029 * when we have associated, we aren't checking whether it actually
1032 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1034 /* And the BSSID changed - we're associated now */
1035 bss_info_changed |= BSS_CHANGED_BSSID;
1037 /* Tell the driver to monitor connection quality (if supported) */
1038 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
1039 bss_conf->cqm_rssi_thold)
1040 bss_info_changed |= BSS_CHANGED_CQM;
1042 /* Enable ARP filtering */
1043 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1044 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1045 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1048 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1050 mutex_lock(&local->iflist_mtx);
1051 ieee80211_recalc_ps(local, -1);
1052 ieee80211_recalc_smps(local);
1053 mutex_unlock(&local->iflist_mtx);
1055 netif_tx_start_all_queues(sdata->dev);
1056 netif_carrier_on(sdata->dev);
1059 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1060 bool remove_sta, bool tx)
1062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1063 struct ieee80211_local *local = sdata->local;
1064 struct sta_info *sta;
1065 u32 changed = 0, config_changed = 0;
1068 ASSERT_MGD_MTX(ifmgd);
1070 if (WARN_ON(!ifmgd->associated))
1073 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1075 ifmgd->associated = NULL;
1076 memset(ifmgd->bssid, 0, ETH_ALEN);
1079 * we need to commit the associated = NULL change because the
1080 * scan code uses that to determine whether this iface should
1081 * go to/wake up from powersave or not -- and could otherwise
1082 * wake the queues erroneously.
1087 * Thus, we can only afterwards stop the queues -- to account
1088 * for the case where another CPU is finishing a scan at this
1089 * time -- we don't want the scan code to enable queues.
1092 netif_tx_stop_all_queues(sdata->dev);
1093 netif_carrier_off(sdata->dev);
1095 mutex_lock(&local->sta_mtx);
1096 sta = sta_info_get(sdata, bssid);
1098 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
1099 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1101 mutex_unlock(&local->sta_mtx);
1103 changed |= ieee80211_reset_erp_info(sdata);
1105 ieee80211_led_assoc(local, 0);
1106 changed |= BSS_CHANGED_ASSOC;
1107 sdata->vif.bss_conf.assoc = false;
1109 ieee80211_set_wmm_default(sdata);
1111 /* channel(_type) changes are handled by ieee80211_hw_config */
1112 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1114 /* on the next assoc, re-program HT parameters */
1115 sdata->ht_opmode_valid = false;
1117 local->power_constr_level = 0;
1119 del_timer_sync(&local->dynamic_ps_timer);
1120 cancel_work_sync(&local->dynamic_ps_enable_work);
1122 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1123 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1124 config_changed |= IEEE80211_CONF_CHANGE_PS;
1126 local->ps_sdata = NULL;
1128 ieee80211_hw_config(local, config_changed);
1130 /* Disable ARP filtering */
1131 if (sdata->vif.bss_conf.arp_filter_enabled) {
1132 sdata->vif.bss_conf.arp_filter_enabled = false;
1133 changed |= BSS_CHANGED_ARP_FILTER;
1136 /* The BSSID (not really interesting) and HT changed */
1137 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1138 ieee80211_bss_info_change_notify(sdata, changed);
1140 /* remove AP and TDLS peers */
1142 sta_info_flush(local, sdata);
1144 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1145 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1146 del_timer_sync(&sdata->u.mgd.timer);
1147 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1150 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1151 struct ieee80211_hdr *hdr)
1154 * We can postpone the mgd.timer whenever receiving unicast frames
1155 * from AP because we know that the connection is working both ways
1156 * at that time. But multicast frames (and hence also beacons) must
1157 * be ignored here, because we need to trigger the timer during
1158 * data idle periods for sending the periodic probe request to the
1159 * AP we're connected to.
1161 if (is_multicast_ether_addr(hdr->addr1))
1164 ieee80211_sta_reset_conn_monitor(sdata);
1167 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1171 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1172 IEEE80211_STA_CONNECTION_POLL)))
1175 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1176 IEEE80211_STA_BEACON_POLL);
1177 mutex_lock(&sdata->local->iflist_mtx);
1178 ieee80211_recalc_ps(sdata->local, -1);
1179 mutex_unlock(&sdata->local->iflist_mtx);
1181 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1185 * We've received a probe response, but are not sure whether
1186 * we have or will be receiving any beacons or data, so let's
1187 * schedule the timers again, just in case.
1189 ieee80211_sta_reset_beacon_monitor(sdata);
1191 mod_timer(&ifmgd->conn_mon_timer,
1192 round_jiffies_up(jiffies +
1193 IEEE80211_CONNECTION_IDLE_TIME));
1196 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1197 struct ieee80211_hdr *hdr, bool ack)
1199 if (!ieee80211_is_data(hdr->frame_control))
1203 ieee80211_sta_reset_conn_monitor(sdata);
1205 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1206 sdata->u.mgd.probe_send_count > 0) {
1208 sdata->u.mgd.probe_send_count = 0;
1210 sdata->u.mgd.nullfunc_failed = true;
1211 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1215 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1219 u8 *dst = ifmgd->associated->bssid;
1220 u8 unicast_limit = max(1, max_probe_tries - 3);
1223 * Try sending broadcast probe requests for the last three
1224 * probe requests after the first ones failed since some
1225 * buggy APs only support broadcast probe requests.
1227 if (ifmgd->probe_send_count >= unicast_limit)
1231 * When the hardware reports an accurate Tx ACK status, it's
1232 * better to send a nullfunc frame instead of a probe request,
1233 * as it will kick us off the AP quickly if we aren't associated
1234 * anymore. The timeout will be reset if the frame is ACKed by
1237 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1238 ifmgd->nullfunc_failed = false;
1239 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1241 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1242 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1243 (u32) -1, true, false);
1246 ifmgd->probe_send_count++;
1247 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1248 run_again(ifmgd, ifmgd->probe_timeout);
1251 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1255 bool already = false;
1257 if (!ieee80211_sdata_running(sdata))
1260 if (sdata->local->scanning)
1263 if (sdata->local->tmp_channel)
1266 mutex_lock(&ifmgd->mtx);
1268 if (!ifmgd->associated)
1271 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1272 if (beacon && net_ratelimit())
1273 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1274 "- sending probe request\n", sdata->name);
1278 * The driver/our work has already reported this event or the
1279 * connection monitoring has kicked in and we have already sent
1280 * a probe request. Or maybe the AP died and the driver keeps
1281 * reporting until we disassociate...
1283 * In either case we have to ignore the current call to this
1284 * function (except for setting the correct probe reason bit)
1285 * because otherwise we would reset the timer every time and
1286 * never check whether we received a probe response!
1288 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1289 IEEE80211_STA_CONNECTION_POLL))
1293 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1295 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1300 mutex_lock(&sdata->local->iflist_mtx);
1301 ieee80211_recalc_ps(sdata->local, -1);
1302 mutex_unlock(&sdata->local->iflist_mtx);
1304 ifmgd->probe_send_count = 0;
1305 ieee80211_mgd_probe_ap_send(sdata);
1307 mutex_unlock(&ifmgd->mtx);
1310 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1311 struct ieee80211_vif *vif)
1313 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1315 struct sk_buff *skb;
1318 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1321 ASSERT_MGD_MTX(ifmgd);
1323 if (!ifmgd->associated)
1326 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1327 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1328 (u32) -1, ssid + 2, ssid[1],
1333 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1335 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1338 struct ieee80211_local *local = sdata->local;
1341 mutex_lock(&ifmgd->mtx);
1342 if (!ifmgd->associated) {
1343 mutex_unlock(&ifmgd->mtx);
1347 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1349 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1350 sdata->name, bssid);
1352 ieee80211_set_disassoc(sdata, true, true);
1353 mutex_unlock(&ifmgd->mtx);
1355 mutex_lock(&local->mtx);
1356 ieee80211_recalc_idle(local);
1357 mutex_unlock(&local->mtx);
1359 * must be outside lock due to cfg80211,
1360 * but that's not a problem.
1362 ieee80211_send_deauth_disassoc(sdata, bssid,
1363 IEEE80211_STYPE_DEAUTH,
1364 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1368 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1370 struct ieee80211_sub_if_data *sdata =
1371 container_of(work, struct ieee80211_sub_if_data,
1372 u.mgd.beacon_connection_loss_work);
1374 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1375 __ieee80211_connection_loss(sdata);
1377 ieee80211_mgd_probe_ap(sdata, true);
1380 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1383 struct ieee80211_hw *hw = &sdata->local->hw;
1385 trace_api_beacon_loss(sdata);
1387 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1388 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1390 EXPORT_SYMBOL(ieee80211_beacon_loss);
1392 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1394 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1395 struct ieee80211_hw *hw = &sdata->local->hw;
1397 trace_api_connection_loss(sdata);
1399 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1400 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1402 EXPORT_SYMBOL(ieee80211_connection_loss);
1405 static enum rx_mgmt_action __must_check
1406 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1407 struct ieee80211_mgmt *mgmt, size_t len)
1409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1410 const u8 *bssid = NULL;
1414 return RX_MGMT_NONE;
1416 ASSERT_MGD_MTX(ifmgd);
1418 bssid = ifmgd->associated->bssid;
1420 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1422 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1423 sdata->name, bssid, reason_code);
1425 ieee80211_set_disassoc(sdata, true, false);
1426 mutex_lock(&sdata->local->mtx);
1427 ieee80211_recalc_idle(sdata->local);
1428 mutex_unlock(&sdata->local->mtx);
1430 return RX_MGMT_CFG80211_DEAUTH;
1434 static enum rx_mgmt_action __must_check
1435 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1436 struct ieee80211_mgmt *mgmt, size_t len)
1438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1442 return RX_MGMT_NONE;
1444 ASSERT_MGD_MTX(ifmgd);
1446 if (WARN_ON(!ifmgd->associated))
1447 return RX_MGMT_NONE;
1449 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1450 return RX_MGMT_NONE;
1452 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1454 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1455 sdata->name, mgmt->sa, reason_code);
1457 ieee80211_set_disassoc(sdata, true, false);
1458 mutex_lock(&sdata->local->mtx);
1459 ieee80211_recalc_idle(sdata->local);
1460 mutex_unlock(&sdata->local->mtx);
1461 return RX_MGMT_CFG80211_DISASSOC;
1465 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1466 struct ieee80211_mgmt *mgmt, size_t len)
1468 struct ieee80211_sub_if_data *sdata = wk->sdata;
1469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1470 struct ieee80211_local *local = sdata->local;
1471 struct ieee80211_supported_band *sband;
1472 struct sta_info *sta;
1473 struct cfg80211_bss *cbss = wk->assoc.bss;
1475 u32 rates, basic_rates;
1476 u16 capab_info, aid;
1477 struct ieee802_11_elems elems;
1478 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1481 bool have_higher_than_11mbit = false;
1482 u16 ap_ht_cap_flags;
1484 /* AssocResp and ReassocResp have identical structure */
1486 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1487 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1489 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1490 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1491 "set\n", sdata->name, aid);
1492 aid &= ~(BIT(15) | BIT(14));
1494 pos = mgmt->u.assoc_resp.variable;
1495 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1497 if (!elems.supp_rates) {
1498 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1505 mutex_lock(&sdata->local->sta_mtx);
1507 * station info was already allocated and inserted before
1508 * the association and should be available to us
1510 sta = sta_info_get_rx(sdata, cbss->bssid);
1511 if (WARN_ON(!sta)) {
1512 mutex_unlock(&sdata->local->sta_mtx);
1516 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1518 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1519 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1523 sband = local->hw.wiphy->bands[wk->chan->band];
1525 for (i = 0; i < elems.supp_rates_len; i++) {
1526 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1527 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1530 have_higher_than_11mbit = true;
1532 for (j = 0; j < sband->n_bitrates; j++) {
1533 if (sband->bitrates[j].bitrate == rate) {
1536 basic_rates |= BIT(j);
1542 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1543 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1544 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1547 have_higher_than_11mbit = true;
1549 for (j = 0; j < sband->n_bitrates; j++) {
1550 if (sband->bitrates[j].bitrate == rate) {
1553 basic_rates |= BIT(j);
1559 sta->sta.supp_rates[wk->chan->band] = rates;
1560 sdata->vif.bss_conf.basic_rates = basic_rates;
1562 /* cf. IEEE 802.11 9.2.12 */
1563 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
1564 have_higher_than_11mbit)
1565 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1567 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1569 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1570 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1571 elems.ht_cap_elem, &sta->sta.ht_cap);
1573 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1575 rate_control_rate_init(sta);
1577 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1578 set_sta_flags(sta, WLAN_STA_MFP);
1580 if (elems.wmm_param)
1581 set_sta_flags(sta, WLAN_STA_WME);
1583 /* sta_info_reinsert will also unlock the mutex lock */
1584 err = sta_info_reinsert(sta);
1587 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1588 " the AP (error %d)\n", sdata->name, err);
1593 * Always handle WMM once after association regardless
1594 * of the first value the AP uses. Setting -1 here has
1595 * that effect because the AP values is an unsigned
1598 ifmgd->wmm_last_param_set = -1;
1600 if (elems.wmm_param)
1601 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1602 elems.wmm_param_len);
1604 ieee80211_set_wmm_default(sdata);
1606 local->oper_channel = wk->chan;
1608 if (elems.ht_info_elem && elems.wmm_param &&
1609 (sdata->local->hw.queues >= 4) &&
1610 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1611 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1612 cbss->bssid, ap_ht_cap_flags,
1615 /* set AID and assoc capability,
1616 * ieee80211_set_associated() will tell the driver */
1617 bss_conf->aid = aid;
1618 bss_conf->assoc_capability = capab_info;
1619 ieee80211_set_associated(sdata, cbss, changed);
1622 * If we're using 4-addr mode, let the AP know that we're
1623 * doing so, so that it can create the STA VLAN on its side
1625 if (ifmgd->use_4addr)
1626 ieee80211_send_4addr_nullfunc(local, sdata);
1629 * Start timer to probe the connection to the AP now.
1630 * Also start the timer that will detect beacon loss.
1632 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1633 ieee80211_sta_reset_beacon_monitor(sdata);
1639 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1640 struct ieee80211_mgmt *mgmt,
1642 struct ieee80211_rx_status *rx_status,
1643 struct ieee802_11_elems *elems,
1646 struct ieee80211_local *local = sdata->local;
1648 struct ieee80211_bss *bss;
1649 struct ieee80211_channel *channel;
1650 bool need_ps = false;
1652 if (sdata->u.mgd.associated) {
1653 bss = (void *)sdata->u.mgd.associated->priv;
1654 /* not previously set so we may need to recalc */
1655 need_ps = !bss->dtim_period;
1658 if (elems->ds_params && elems->ds_params_len == 1)
1659 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1662 freq = rx_status->freq;
1664 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1666 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1669 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1672 ieee80211_rx_bss_put(local, bss);
1674 if (!sdata->u.mgd.associated)
1678 mutex_lock(&local->iflist_mtx);
1679 ieee80211_recalc_ps(local, -1);
1680 mutex_unlock(&local->iflist_mtx);
1683 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1684 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1686 struct ieee80211_channel_sw_ie *sw_elem =
1687 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1688 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1689 bss, rx_status->mactime);
1694 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1695 struct sk_buff *skb)
1697 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1698 struct ieee80211_if_managed *ifmgd;
1699 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1700 size_t baselen, len = skb->len;
1701 struct ieee802_11_elems elems;
1703 ifmgd = &sdata->u.mgd;
1705 ASSERT_MGD_MTX(ifmgd);
1707 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1708 return; /* ignore ProbeResp to foreign address */
1710 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1714 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1717 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1719 if (ifmgd->associated &&
1720 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1721 ieee80211_reset_ap_probe(sdata);
1725 * This is the canonical list of information elements we care about,
1726 * the filter code also gives us all changes to the Microsoft OUI
1727 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1729 * We implement beacon filtering in software since that means we can
1730 * avoid processing the frame here and in cfg80211, and userspace
1731 * will not be able to tell whether the hardware supports it or not.
1733 * XXX: This list needs to be dynamic -- userspace needs to be able to
1734 * add items it requires. It also needs to be able to tell us to
1735 * look out for other vendor IEs.
1737 static const u64 care_about_ies =
1738 (1ULL << WLAN_EID_COUNTRY) |
1739 (1ULL << WLAN_EID_ERP_INFO) |
1740 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1741 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1742 (1ULL << WLAN_EID_HT_CAPABILITY) |
1743 (1ULL << WLAN_EID_HT_INFORMATION);
1745 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1746 struct ieee80211_mgmt *mgmt,
1748 struct ieee80211_rx_status *rx_status)
1750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1751 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1753 struct ieee802_11_elems elems;
1754 struct ieee80211_local *local = sdata->local;
1756 bool erp_valid, directed_tim = false;
1761 ASSERT_MGD_MTX(ifmgd);
1763 /* Process beacon from the current BSS */
1764 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1768 if (rx_status->freq != local->hw.conf.channel->center_freq)
1772 * We might have received a number of frames, among them a
1773 * disassoc frame and a beacon...
1775 if (!ifmgd->associated)
1778 bssid = ifmgd->associated->bssid;
1781 * And in theory even frames from a different AP we were just
1782 * associated to a split-second ago!
1784 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1787 /* Track average RSSI from the Beacon frames of the current AP */
1788 ifmgd->last_beacon_signal = rx_status->signal;
1789 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1790 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1791 ifmgd->ave_beacon_signal = rx_status->signal * 16;
1792 ifmgd->last_cqm_event_signal = 0;
1793 ifmgd->count_beacon_signal = 1;
1794 ifmgd->last_ave_beacon_signal = 0;
1796 ifmgd->ave_beacon_signal =
1797 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1798 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1799 ifmgd->ave_beacon_signal) / 16;
1800 ifmgd->count_beacon_signal++;
1803 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1804 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1805 int sig = ifmgd->ave_beacon_signal;
1806 int last_sig = ifmgd->last_ave_beacon_signal;
1809 * if signal crosses either of the boundaries, invoke callback
1810 * with appropriate parameters
1812 if (sig > ifmgd->rssi_max_thold &&
1813 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1814 ifmgd->last_ave_beacon_signal = sig;
1815 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1816 } else if (sig < ifmgd->rssi_min_thold &&
1817 (last_sig >= ifmgd->rssi_max_thold ||
1819 ifmgd->last_ave_beacon_signal = sig;
1820 drv_rssi_callback(local, RSSI_EVENT_LOW);
1824 if (bss_conf->cqm_rssi_thold &&
1825 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
1826 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1827 int sig = ifmgd->ave_beacon_signal / 16;
1828 int last_event = ifmgd->last_cqm_event_signal;
1829 int thold = bss_conf->cqm_rssi_thold;
1830 int hyst = bss_conf->cqm_rssi_hyst;
1832 (last_event == 0 || sig < last_event - hyst)) {
1833 ifmgd->last_cqm_event_signal = sig;
1834 ieee80211_cqm_rssi_notify(
1836 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1838 } else if (sig > thold &&
1839 (last_event == 0 || sig > last_event + hyst)) {
1840 ifmgd->last_cqm_event_signal = sig;
1841 ieee80211_cqm_rssi_notify(
1843 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1848 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1849 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1850 if (net_ratelimit()) {
1851 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1852 "to a received beacon\n", sdata->name);
1855 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1856 mutex_lock(&local->iflist_mtx);
1857 ieee80211_recalc_ps(local, -1);
1858 mutex_unlock(&local->iflist_mtx);
1862 * Push the beacon loss detection into the future since
1863 * we are processing a beacon from the AP just now.
1865 ieee80211_sta_reset_beacon_monitor(sdata);
1867 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1868 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1869 len - baselen, &elems,
1870 care_about_ies, ncrc);
1872 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1873 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1876 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
1877 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1880 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1881 elems.wmm_param_len);
1884 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1886 if (local->hw.conf.dynamic_ps_timeout > 0) {
1887 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1888 ieee80211_hw_config(local,
1889 IEEE80211_CONF_CHANGE_PS);
1890 ieee80211_send_nullfunc(local, sdata, 0);
1892 local->pspolling = true;
1895 * Here is assumed that the driver will be
1896 * able to send ps-poll frame and receive a
1897 * response even though power save mode is
1898 * enabled, but some drivers might require
1899 * to disable power save here. This needs
1900 * to be investigated.
1902 ieee80211_send_pspoll(local, sdata);
1907 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
1909 ifmgd->beacon_crc = ncrc;
1910 ifmgd->beacon_crc_valid = true;
1912 if (elems.erp_info && elems.erp_info_len >= 1) {
1914 erp_value = elems.erp_info[0];
1918 changed |= ieee80211_handle_bss_capability(sdata,
1919 le16_to_cpu(mgmt->u.beacon.capab_info),
1920 erp_valid, erp_value);
1923 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1924 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1925 struct sta_info *sta;
1926 struct ieee80211_supported_band *sband;
1927 u16 ap_ht_cap_flags;
1931 sta = sta_info_get(sdata, bssid);
1932 if (WARN_ON(!sta)) {
1937 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1939 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1940 elems.ht_cap_elem, &sta->sta.ht_cap);
1942 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1946 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1947 bssid, ap_ht_cap_flags, true);
1950 /* Note: country IE parsing is done for us by cfg80211 */
1951 if (elems.country_elem) {
1952 /* TODO: IBSS also needs this */
1953 if (elems.pwr_constr_elem)
1954 ieee80211_handle_pwr_constr(sdata,
1955 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1956 elems.pwr_constr_elem,
1957 elems.pwr_constr_elem_len);
1960 ieee80211_bss_info_change_notify(sdata, changed);
1963 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1964 struct sk_buff *skb)
1966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1967 struct ieee80211_rx_status *rx_status;
1968 struct ieee80211_mgmt *mgmt;
1969 enum rx_mgmt_action rma = RX_MGMT_NONE;
1972 rx_status = (struct ieee80211_rx_status *) skb->cb;
1973 mgmt = (struct ieee80211_mgmt *) skb->data;
1974 fc = le16_to_cpu(mgmt->frame_control);
1976 mutex_lock(&ifmgd->mtx);
1978 if (ifmgd->associated &&
1979 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1980 switch (fc & IEEE80211_FCTL_STYPE) {
1981 case IEEE80211_STYPE_BEACON:
1982 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1985 case IEEE80211_STYPE_PROBE_RESP:
1986 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1988 case IEEE80211_STYPE_DEAUTH:
1989 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1991 case IEEE80211_STYPE_DISASSOC:
1992 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1994 case IEEE80211_STYPE_ACTION:
1995 switch (mgmt->u.action.category) {
1996 case WLAN_CATEGORY_SPECTRUM_MGMT:
1997 ieee80211_sta_process_chanswitch(sdata,
1998 &mgmt->u.action.u.chan_switch.sw_elem,
1999 (void *)ifmgd->associated->priv,
2000 rx_status->mactime);
2004 mutex_unlock(&ifmgd->mtx);
2010 case RX_MGMT_CFG80211_DEAUTH:
2011 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2013 case RX_MGMT_CFG80211_DISASSOC:
2014 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2017 WARN(1, "unexpected: %d", rma);
2022 mutex_unlock(&ifmgd->mtx);
2024 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2025 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2026 struct ieee80211_local *local = sdata->local;
2027 struct ieee80211_work *wk;
2029 mutex_lock(&local->mtx);
2030 list_for_each_entry(wk, &local->work_list, list) {
2031 if (wk->sdata != sdata)
2034 if (wk->type != IEEE80211_WORK_ASSOC &&
2035 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2038 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2040 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2044 * Printing the message only here means we can't
2045 * spuriously print it, but it also means that it
2046 * won't be printed when the frame comes in before
2047 * we even tried to associate or in similar cases.
2049 * Ultimately, I suspect cfg80211 should print the
2053 "%s: deauthenticated from %pM (Reason: %u)\n",
2054 sdata->name, mgmt->bssid,
2055 le16_to_cpu(mgmt->u.deauth.reason_code));
2057 list_del_rcu(&wk->list);
2061 mutex_unlock(&local->mtx);
2063 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2067 static void ieee80211_sta_timer(unsigned long data)
2069 struct ieee80211_sub_if_data *sdata =
2070 (struct ieee80211_sub_if_data *) data;
2071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2072 struct ieee80211_local *local = sdata->local;
2074 if (local->quiescing) {
2075 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2079 ieee80211_queue_work(&local->hw, &sdata->work);
2082 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2083 u8 *bssid, u8 reason)
2085 struct ieee80211_local *local = sdata->local;
2086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2088 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2089 IEEE80211_STA_BEACON_POLL);
2091 ieee80211_set_disassoc(sdata, true, true);
2092 mutex_unlock(&ifmgd->mtx);
2093 mutex_lock(&local->mtx);
2094 ieee80211_recalc_idle(local);
2095 mutex_unlock(&local->mtx);
2097 * must be outside lock due to cfg80211,
2098 * but that's not a problem.
2100 ieee80211_send_deauth_disassoc(sdata, bssid,
2101 IEEE80211_STYPE_DEAUTH, reason,
2103 mutex_lock(&ifmgd->mtx);
2106 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2108 struct ieee80211_local *local = sdata->local;
2109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2111 /* then process the rest of the work */
2112 mutex_lock(&ifmgd->mtx);
2114 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2115 IEEE80211_STA_CONNECTION_POLL) &&
2116 ifmgd->associated) {
2120 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2122 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2123 max_tries = max_nullfunc_tries;
2125 max_tries = max_probe_tries;
2127 /* ACK received for nullfunc probing frame */
2128 if (!ifmgd->probe_send_count)
2129 ieee80211_reset_ap_probe(sdata);
2130 else if (ifmgd->nullfunc_failed) {
2131 if (ifmgd->probe_send_count < max_tries) {
2132 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2133 wiphy_debug(local->hw.wiphy,
2134 "%s: No ack for nullfunc frame to"
2135 " AP %pM, try %d/%i\n",
2137 ifmgd->probe_send_count, max_tries);
2139 ieee80211_mgd_probe_ap_send(sdata);
2141 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2142 wiphy_debug(local->hw.wiphy,
2143 "%s: No ack for nullfunc frame to"
2144 " AP %pM, disconnecting.\n",
2145 sdata->name, bssid);
2147 ieee80211_sta_connection_lost(sdata, bssid,
2148 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2150 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2151 run_again(ifmgd, ifmgd->probe_timeout);
2152 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2153 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2154 wiphy_debug(local->hw.wiphy,
2155 "%s: Failed to send nullfunc to AP %pM"
2156 " after %dms, disconnecting.\n",
2158 bssid, probe_wait_ms);
2160 ieee80211_sta_connection_lost(sdata, bssid,
2161 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2162 } else if (ifmgd->probe_send_count < max_tries) {
2163 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2164 wiphy_debug(local->hw.wiphy,
2165 "%s: No probe response from AP %pM"
2166 " after %dms, try %d/%i\n",
2168 bssid, probe_wait_ms,
2169 ifmgd->probe_send_count, max_tries);
2171 ieee80211_mgd_probe_ap_send(sdata);
2174 * We actually lost the connection ... or did we?
2177 wiphy_debug(local->hw.wiphy,
2178 "%s: No probe response from AP %pM"
2179 " after %dms, disconnecting.\n",
2181 bssid, probe_wait_ms);
2183 ieee80211_sta_connection_lost(sdata, bssid,
2184 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2188 mutex_unlock(&ifmgd->mtx);
2191 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2193 struct ieee80211_sub_if_data *sdata =
2194 (struct ieee80211_sub_if_data *) data;
2195 struct ieee80211_local *local = sdata->local;
2197 if (local->quiescing)
2200 ieee80211_queue_work(&sdata->local->hw,
2201 &sdata->u.mgd.beacon_connection_loss_work);
2204 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2206 struct ieee80211_sub_if_data *sdata =
2207 (struct ieee80211_sub_if_data *) data;
2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2209 struct ieee80211_local *local = sdata->local;
2211 if (local->quiescing)
2214 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2217 static void ieee80211_sta_monitor_work(struct work_struct *work)
2219 struct ieee80211_sub_if_data *sdata =
2220 container_of(work, struct ieee80211_sub_if_data,
2221 u.mgd.monitor_work);
2223 ieee80211_mgd_probe_ap(sdata, false);
2226 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2228 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2229 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2230 IEEE80211_STA_CONNECTION_POLL);
2232 /* let's probe the connection once */
2233 ieee80211_queue_work(&sdata->local->hw,
2234 &sdata->u.mgd.monitor_work);
2235 /* and do all the other regular work too */
2236 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2241 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2246 * we need to use atomic bitops for the running bits
2247 * only because both timers might fire at the same
2248 * time -- the code here is properly synchronised.
2251 cancel_work_sync(&ifmgd->request_smps_work);
2253 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2254 if (del_timer_sync(&ifmgd->timer))
2255 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2257 cancel_work_sync(&ifmgd->chswitch_work);
2258 if (del_timer_sync(&ifmgd->chswitch_timer))
2259 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2261 cancel_work_sync(&ifmgd->monitor_work);
2262 /* these will just be re-established on connection */
2263 del_timer_sync(&ifmgd->conn_mon_timer);
2264 del_timer_sync(&ifmgd->bcn_mon_timer);
2267 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2271 if (!ifmgd->associated)
2274 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2275 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2276 mutex_lock(&ifmgd->mtx);
2277 if (ifmgd->associated) {
2278 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2279 wiphy_debug(sdata->local->hw.wiphy,
2280 "%s: driver requested disconnect after resume.\n",
2283 ieee80211_sta_connection_lost(sdata,
2284 ifmgd->associated->bssid,
2285 WLAN_REASON_UNSPECIFIED);
2286 mutex_unlock(&ifmgd->mtx);
2289 mutex_unlock(&ifmgd->mtx);
2292 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2293 add_timer(&ifmgd->timer);
2294 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2295 add_timer(&ifmgd->chswitch_timer);
2296 ieee80211_sta_reset_beacon_monitor(sdata);
2297 ieee80211_restart_sta_timer(sdata);
2298 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
2302 /* interface setup */
2303 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2305 struct ieee80211_if_managed *ifmgd;
2307 ifmgd = &sdata->u.mgd;
2308 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2309 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2310 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2311 ieee80211_beacon_connection_loss_work);
2312 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2313 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2314 (unsigned long) sdata);
2315 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2316 (unsigned long) sdata);
2317 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2318 (unsigned long) sdata);
2319 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2320 (unsigned long) sdata);
2324 mutex_init(&ifmgd->mtx);
2326 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2327 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2329 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2332 /* scan finished notification */
2333 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2335 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2337 /* Restart STA timers */
2339 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2340 ieee80211_restart_sta_timer(sdata);
2344 int ieee80211_max_network_latency(struct notifier_block *nb,
2345 unsigned long data, void *dummy)
2347 s32 latency_usec = (s32) data;
2348 struct ieee80211_local *local =
2349 container_of(nb, struct ieee80211_local,
2350 network_latency_notifier);
2352 mutex_lock(&local->iflist_mtx);
2353 ieee80211_recalc_ps(local, latency_usec);
2354 mutex_unlock(&local->iflist_mtx);
2360 static enum work_done_result
2361 ieee80211_probe_auth_done(struct ieee80211_work *wk,
2362 struct sk_buff *skb)
2364 struct ieee80211_local *local = wk->sdata->local;
2367 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2371 if (wk->type == IEEE80211_WORK_AUTH) {
2372 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2376 mutex_lock(&wk->sdata->u.mgd.mtx);
2377 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2378 mutex_unlock(&wk->sdata->u.mgd.mtx);
2380 wk->type = IEEE80211_WORK_AUTH;
2381 wk->probe_auth.tries = 0;
2382 return WORK_DONE_REQUEUE;
2384 if (wk->probe_auth.synced)
2385 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2386 IEEE80211_TX_SYNC_AUTH);
2388 return WORK_DONE_DESTROY;
2391 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2392 struct cfg80211_auth_request *req)
2395 struct ieee80211_work *wk;
2398 if (req->local_state_change)
2399 return 0; /* no need to update mac80211 state */
2401 switch (req->auth_type) {
2402 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2403 auth_alg = WLAN_AUTH_OPEN;
2405 case NL80211_AUTHTYPE_SHARED_KEY:
2406 if (IS_ERR(sdata->local->wep_tx_tfm))
2408 auth_alg = WLAN_AUTH_SHARED_KEY;
2410 case NL80211_AUTHTYPE_FT:
2411 auth_alg = WLAN_AUTH_FT;
2413 case NL80211_AUTHTYPE_NETWORK_EAP:
2414 auth_alg = WLAN_AUTH_LEAP;
2420 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2424 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2426 if (req->ie && req->ie_len) {
2427 memcpy(wk->ie, req->ie, req->ie_len);
2428 wk->ie_len = req->ie_len;
2431 if (req->key && req->key_len) {
2432 wk->probe_auth.key_len = req->key_len;
2433 wk->probe_auth.key_idx = req->key_idx;
2434 memcpy(wk->probe_auth.key, req->key, req->key_len);
2437 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2438 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2439 wk->probe_auth.ssid_len = ssid[1];
2441 wk->probe_auth.algorithm = auth_alg;
2442 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
2444 /* if we already have a probe, don't probe again */
2445 if (req->bss->proberesp_ies)
2446 wk->type = IEEE80211_WORK_AUTH;
2448 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2449 wk->chan = req->bss->channel;
2450 wk->chan_type = NL80211_CHAN_NO_HT;
2452 wk->done = ieee80211_probe_auth_done;
2454 ieee80211_add_work(wk);
2458 /* create and insert a dummy station entry */
2459 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2461 struct sta_info *sta;
2464 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
2470 err = sta_info_insert(sta);
2473 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2474 " the AP (error %d)\n", sdata->name, err);
2481 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2482 struct sk_buff *skb)
2484 struct ieee80211_local *local = wk->sdata->local;
2485 struct ieee80211_mgmt *mgmt;
2486 struct ieee80211_rx_status *rx_status;
2487 struct ieee802_11_elems elems;
2488 struct cfg80211_bss *cbss = wk->assoc.bss;
2492 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2493 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2497 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2498 mutex_lock(&wk->sdata->u.mgd.mtx);
2499 rx_status = (void *) skb->cb;
2500 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2501 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2503 mutex_unlock(&wk->sdata->u.mgd.mtx);
2505 wk->type = IEEE80211_WORK_ASSOC;
2506 /* not really done yet */
2507 return WORK_DONE_REQUEUE;
2510 mgmt = (void *)skb->data;
2511 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2513 if (status == WLAN_STATUS_SUCCESS) {
2514 if (wk->assoc.synced)
2515 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2516 IEEE80211_TX_SYNC_ASSOC);
2518 mutex_lock(&wk->sdata->u.mgd.mtx);
2519 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2520 mutex_unlock(&wk->sdata->u.mgd.mtx);
2521 /* oops -- internal error -- send timeout for now */
2522 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2523 cfg80211_send_assoc_timeout(wk->sdata->dev,
2525 return WORK_DONE_DESTROY;
2528 mutex_unlock(&wk->sdata->u.mgd.mtx);
2530 /* assoc failed - destroy the dummy station entry */
2531 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2534 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2536 if (wk->assoc.synced)
2537 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2538 IEEE80211_TX_SYNC_ASSOC);
2540 return WORK_DONE_DESTROY;
2543 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2544 struct cfg80211_assoc_request *req)
2546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2547 struct ieee80211_bss *bss = (void *)req->bss->priv;
2548 struct ieee80211_work *wk;
2552 mutex_lock(&ifmgd->mtx);
2553 if (ifmgd->associated) {
2554 if (!req->prev_bssid ||
2555 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2558 * We are already associated and the request was not a
2559 * reassociation request from the current BSS, so
2562 mutex_unlock(&ifmgd->mtx);
2566 /* Trying to reassociate - clear previous association state */
2567 ieee80211_set_disassoc(sdata, true, false);
2569 mutex_unlock(&ifmgd->mtx);
2571 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2576 * create a dummy station info entry in order
2577 * to start accepting incoming EAPOL packets from the station
2579 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2585 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2586 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2588 ifmgd->beacon_crc_valid = false;
2590 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2591 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2592 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2593 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2594 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2597 if (req->ie && req->ie_len) {
2598 memcpy(wk->ie, req->ie, req->ie_len);
2599 wk->ie_len = req->ie_len;
2603 wk->assoc.bss = req->bss;
2605 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2607 /* new association always uses requested smps mode */
2608 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2609 if (ifmgd->powersave)
2610 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2612 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2614 ifmgd->ap_smps = ifmgd->req_smps;
2616 wk->assoc.smps = ifmgd->ap_smps;
2618 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2619 * We still associate in non-HT mode (11a/b/g) if any one of these
2620 * ciphers is configured as pairwise.
2621 * We can set this to true for non-11n hardware, that'll be checked
2622 * separately along with the peer capabilities.
2624 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2625 wk->assoc.capability = req->bss->capability;
2626 wk->assoc.wmm_used = bss->wmm_used;
2627 wk->assoc.supp_rates = bss->supp_rates;
2628 wk->assoc.supp_rates_len = bss->supp_rates_len;
2629 wk->assoc.ht_information_ie =
2630 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2632 if (bss->wmm_used && bss->uapsd_supported &&
2633 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2634 wk->assoc.uapsd_used = true;
2635 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2637 wk->assoc.uapsd_used = false;
2638 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2641 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2642 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2643 wk->assoc.ssid_len = ssid[1];
2645 if (req->prev_bssid)
2646 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2648 wk->chan = req->bss->channel;
2649 wk->chan_type = NL80211_CHAN_NO_HT;
2651 wk->done = ieee80211_assoc_done;
2652 if (!bss->dtim_period &&
2653 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2654 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2656 wk->type = IEEE80211_WORK_ASSOC;
2659 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2660 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2662 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2663 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2666 if (req->crypto.control_port)
2667 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2669 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2671 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2672 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2674 ieee80211_add_work(wk);
2678 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2679 struct cfg80211_deauth_request *req,
2682 struct ieee80211_local *local = sdata->local;
2683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2684 struct ieee80211_work *wk;
2686 bool assoc_bss = false;
2688 mutex_lock(&ifmgd->mtx);
2690 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2691 if (ifmgd->associated == req->bss) {
2692 ieee80211_set_disassoc(sdata, false, true);
2693 mutex_unlock(&ifmgd->mtx);
2696 bool not_auth_yet = false;
2698 mutex_unlock(&ifmgd->mtx);
2700 mutex_lock(&local->mtx);
2701 list_for_each_entry(wk, &local->work_list, list) {
2702 if (wk->sdata != sdata)
2705 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2706 wk->type != IEEE80211_WORK_AUTH &&
2707 wk->type != IEEE80211_WORK_ASSOC &&
2708 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2711 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2714 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2715 list_del_rcu(&wk->list);
2719 mutex_unlock(&local->mtx);
2722 * If somebody requests authentication and we haven't
2723 * sent out an auth frame yet there's no need to send
2724 * out a deauth frame either. If the state was PROBE,
2725 * then this is the case. If it's AUTH we have sent a
2726 * frame, and if it's IDLE we have completed the auth
2730 __cfg80211_auth_canceled(sdata->dev, bssid);
2735 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2736 sdata->name, bssid, req->reason_code);
2738 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2739 req->reason_code, cookie,
2740 !req->local_state_change);
2742 sta_info_flush(sdata->local, sdata);
2744 mutex_lock(&sdata->local->mtx);
2745 ieee80211_recalc_idle(sdata->local);
2746 mutex_unlock(&sdata->local->mtx);
2751 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2752 struct cfg80211_disassoc_request *req,
2755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2758 mutex_lock(&ifmgd->mtx);
2761 * cfg80211 should catch this ... but it's racy since
2762 * we can receive a disassoc frame, process it, hand it
2763 * to cfg80211 while that's in a locked section already
2764 * trying to tell us that the user wants to disconnect.
2766 if (ifmgd->associated != req->bss) {
2767 mutex_unlock(&ifmgd->mtx);
2771 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2772 sdata->name, req->bss->bssid, req->reason_code);
2774 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2775 ieee80211_set_disassoc(sdata, false, true);
2777 mutex_unlock(&ifmgd->mtx);
2779 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2780 IEEE80211_STYPE_DISASSOC, req->reason_code,
2781 cookie, !req->local_state_change);
2782 sta_info_flush(sdata->local, sdata);
2784 mutex_lock(&sdata->local->mtx);
2785 ieee80211_recalc_idle(sdata->local);
2786 mutex_unlock(&sdata->local->mtx);
2791 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2792 enum nl80211_cqm_rssi_threshold_event rssi_event,
2795 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2797 trace_api_cqm_rssi_notify(sdata, rssi_event);
2799 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2801 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
2803 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2805 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2806 return sdata->dev->operstate;
2808 EXPORT_SYMBOL(ieee80211_get_operstate);