2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 static int max_nullfunc_tries = 2;
32 module_param(max_nullfunc_tries, int, 0644);
33 MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
36 static int max_probe_tries = 5;
37 module_param(max_probe_tries, int, 0644);
38 MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
49 #define IEEE80211_BEACON_LOSS_COUNT 7
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
55 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
61 static int probe_wait_ms = 500;
62 module_param(probe_wait_ms, int, 0644);
63 MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
72 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
78 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
80 #define TMR_RUNNING_TIMER 0
81 #define TMR_RUNNING_CHANSW 1
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
90 /* no action required */
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
101 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
103 lockdep_assert_held(&ifmgd->mtx);
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
116 static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
119 ASSERT_MGD_MTX(ifmgd);
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
126 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
135 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
139 if (unlikely(!sdata->u.mgd.associated))
142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
148 ifmgd->probe_send_count = 0;
151 static int ecw2cw(int ecw)
153 return (1 << ecw) - 1;
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
161 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
168 struct sta_info *sta;
172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
178 prev_chantype = sdata->vif.bss_conf.channel_type;
180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
207 channel_type = NL80211_CHAN_HT20;
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 !ieee80111_cfg_override_disables_ht40(sdata) &&
211 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
212 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
213 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
214 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
215 if (!(local->hw.conf.channel->flags &
216 IEEE80211_CHAN_NO_HT40PLUS))
217 channel_type = NL80211_CHAN_HT40PLUS;
219 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
220 if (!(local->hw.conf.channel->flags &
221 IEEE80211_CHAN_NO_HT40MINUS))
222 channel_type = NL80211_CHAN_HT40MINUS;
228 if (local->tmp_channel)
229 local->tmp_channel_type = channel_type;
231 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
232 /* can only fail due to HT40+/- mismatch */
233 channel_type = NL80211_CHAN_HT20;
234 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
237 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
239 * Whenever the AP announces the HT mode change that can be
240 * 40MHz intolerant or etc., it would be safer to stop tx
241 * queues before doing hw config to avoid buffer overflow.
243 ieee80211_stop_queues_by_reason(&sdata->local->hw,
244 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
246 /* flush out all packets */
249 drv_flush(local, false);
252 /* channel_type change automatically detected */
253 ieee80211_hw_config(local, 0);
255 if (prev_chantype != channel_type) {
257 sta = sta_info_get(sdata, bssid);
259 rate_control_rate_update(local, sband, sta,
260 IEEE80211_RC_HT_CHANGED,
265 ieee80211_wake_queues_by_reason(&sdata->local->hw,
266 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
269 ht_opmode = le16_to_cpu(hti->operation_mode);
271 /* if bss configuration changed store the new one */
272 if (sdata->ht_opmode_valid != enable_ht ||
273 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
274 prev_chantype != channel_type) {
275 changed |= BSS_CHANGED_HT;
276 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
277 sdata->ht_opmode_valid = enable_ht;
283 /* frame sending functions */
285 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
286 const u8 *bssid, u16 stype, u16 reason,
287 void *cookie, bool send_frame)
289 struct ieee80211_local *local = sdata->local;
290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
292 struct ieee80211_mgmt *mgmt;
294 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
298 skb_reserve(skb, local->hw.extra_tx_headroom);
300 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
302 memcpy(mgmt->da, bssid, ETH_ALEN);
303 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
304 memcpy(mgmt->bssid, bssid, ETH_ALEN);
305 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
307 /* u.deauth.reason_code == u.disassoc.reason_code */
308 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
310 if (stype == IEEE80211_STYPE_DEAUTH)
312 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
314 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
317 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
319 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
320 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
329 void ieee80211_send_pspoll(struct ieee80211_local *local,
330 struct ieee80211_sub_if_data *sdata)
332 struct ieee80211_pspoll *pspoll;
335 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
339 pspoll = (struct ieee80211_pspoll *) skb->data;
340 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
343 ieee80211_tx_skb(sdata, skb);
346 void ieee80211_send_nullfunc(struct ieee80211_local *local,
347 struct ieee80211_sub_if_data *sdata,
351 struct ieee80211_hdr_3addr *nullfunc;
352 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
354 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
358 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
360 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
362 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
363 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
364 IEEE80211_STA_CONNECTION_POLL))
365 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
367 ieee80211_tx_skb(sdata, skb);
370 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
371 struct ieee80211_sub_if_data *sdata)
374 struct ieee80211_hdr *nullfunc;
377 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
380 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
384 skb_reserve(skb, local->hw.extra_tx_headroom);
386 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
387 memset(nullfunc, 0, 30);
388 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
389 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
390 nullfunc->frame_control = fc;
391 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
392 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
393 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
394 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
396 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
397 ieee80211_tx_skb(sdata, skb);
400 /* spectrum management related things */
401 static void ieee80211_chswitch_work(struct work_struct *work)
403 struct ieee80211_sub_if_data *sdata =
404 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
407 if (!ieee80211_sdata_running(sdata))
410 mutex_lock(&ifmgd->mtx);
411 if (!ifmgd->associated)
414 sdata->local->oper_channel = sdata->local->csa_channel;
415 if (!sdata->local->ops->channel_switch) {
416 /* call "hw_config" only if doing sw channel switch */
417 ieee80211_hw_config(sdata->local,
418 IEEE80211_CONF_CHANGE_CHANNEL);
420 /* update the device channel directly */
421 sdata->local->hw.conf.channel = sdata->local->oper_channel;
424 /* XXX: shouldn't really modify cfg80211-owned data! */
425 ifmgd->associated->channel = sdata->local->oper_channel;
427 ieee80211_wake_queues_by_reason(&sdata->local->hw,
428 IEEE80211_QUEUE_STOP_REASON_CSA);
430 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
431 mutex_unlock(&ifmgd->mtx);
434 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
436 struct ieee80211_sub_if_data *sdata;
437 struct ieee80211_if_managed *ifmgd;
439 sdata = vif_to_sdata(vif);
440 ifmgd = &sdata->u.mgd;
442 trace_api_chswitch_done(sdata, success);
445 * If the channel switch was not successful, stay
446 * around on the old channel. We currently lack
447 * good handling of this situation, possibly we
448 * should just drop the association.
450 sdata->local->csa_channel = sdata->local->oper_channel;
453 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
455 EXPORT_SYMBOL(ieee80211_chswitch_done);
457 static void ieee80211_chswitch_timer(unsigned long data)
459 struct ieee80211_sub_if_data *sdata =
460 (struct ieee80211_sub_if_data *) data;
461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
463 if (sdata->local->quiescing) {
464 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
468 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
471 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
472 struct ieee80211_channel_sw_ie *sw_elem,
473 struct ieee80211_bss *bss,
476 struct cfg80211_bss *cbss =
477 container_of((void *)bss, struct cfg80211_bss, priv);
478 struct ieee80211_channel *new_ch;
479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
480 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
481 cbss->channel->band);
483 ASSERT_MGD_MTX(ifmgd);
485 if (!ifmgd->associated)
488 if (sdata->local->scanning)
491 /* Disregard subsequent beacons if we are already running a timer
494 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
497 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
498 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
501 sdata->local->csa_channel = new_ch;
503 if (sdata->local->ops->channel_switch) {
504 /* use driver's channel switch callback */
505 struct ieee80211_channel_switch ch_switch;
506 memset(&ch_switch, 0, sizeof(ch_switch));
507 ch_switch.timestamp = timestamp;
509 ch_switch.block_tx = true;
510 ieee80211_stop_queues_by_reason(&sdata->local->hw,
511 IEEE80211_QUEUE_STOP_REASON_CSA);
513 ch_switch.channel = new_ch;
514 ch_switch.count = sw_elem->count;
515 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
516 drv_channel_switch(sdata->local, &ch_switch);
520 /* channel switch handled in software */
521 if (sw_elem->count <= 1) {
522 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
525 ieee80211_stop_queues_by_reason(&sdata->local->hw,
526 IEEE80211_QUEUE_STOP_REASON_CSA);
527 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
528 mod_timer(&ifmgd->chswitch_timer,
530 msecs_to_jiffies(sw_elem->count *
531 cbss->beacon_interval));
535 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
536 u16 capab_info, u8 *pwr_constr_elem,
537 u8 pwr_constr_elem_len)
539 struct ieee80211_conf *conf = &sdata->local->hw.conf;
541 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
544 /* Power constraint IE length should be 1 octet */
545 if (pwr_constr_elem_len != 1)
548 if ((*pwr_constr_elem <= conf->channel->max_power) &&
549 (*pwr_constr_elem != sdata->local->power_constr_level)) {
550 sdata->local->power_constr_level = *pwr_constr_elem;
551 ieee80211_hw_config(sdata->local, 0);
555 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
557 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
558 struct ieee80211_local *local = sdata->local;
559 struct ieee80211_conf *conf = &local->hw.conf;
561 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
562 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
563 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
565 local->disable_dynamic_ps = false;
566 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
568 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
570 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
572 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
573 struct ieee80211_local *local = sdata->local;
574 struct ieee80211_conf *conf = &local->hw.conf;
576 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
577 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
578 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
580 local->disable_dynamic_ps = true;
581 conf->dynamic_ps_timeout = 0;
582 del_timer_sync(&local->dynamic_ps_timer);
583 ieee80211_queue_work(&local->hw,
584 &local->dynamic_ps_enable_work);
586 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
589 static void ieee80211_enable_ps(struct ieee80211_local *local,
590 struct ieee80211_sub_if_data *sdata)
592 struct ieee80211_conf *conf = &local->hw.conf;
595 * If we are scanning right now then the parameters will
596 * take effect when scan finishes.
601 if (conf->dynamic_ps_timeout > 0 &&
602 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
603 mod_timer(&local->dynamic_ps_timer, jiffies +
604 msecs_to_jiffies(conf->dynamic_ps_timeout));
606 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
607 ieee80211_send_nullfunc(local, sdata, 1);
609 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
610 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
613 conf->flags |= IEEE80211_CONF_PS;
614 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
618 static void ieee80211_change_ps(struct ieee80211_local *local)
620 struct ieee80211_conf *conf = &local->hw.conf;
622 if (local->ps_sdata) {
623 ieee80211_enable_ps(local, local->ps_sdata);
624 } else if (conf->flags & IEEE80211_CONF_PS) {
625 conf->flags &= ~IEEE80211_CONF_PS;
626 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
627 del_timer_sync(&local->dynamic_ps_timer);
628 cancel_work_sync(&local->dynamic_ps_enable_work);
632 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
634 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
635 struct sta_info *sta = NULL;
636 bool authorized = false;
644 if (!mgd->associated)
647 if (!mgd->associated->beacon_ies)
650 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
651 IEEE80211_STA_CONNECTION_POLL))
655 sta = sta_info_get(sdata, mgd->bssid);
657 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
663 /* need to hold RTNL or interface lock */
664 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
666 struct ieee80211_sub_if_data *sdata, *found = NULL;
670 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
671 local->ps_sdata = NULL;
675 if (!list_empty(&local->work_list)) {
676 local->ps_sdata = NULL;
680 list_for_each_entry(sdata, &local->interfaces, list) {
681 if (!ieee80211_sdata_running(sdata))
683 if (sdata->vif.type == NL80211_IFTYPE_AP) {
684 /* If an AP vif is found, then disable PS
685 * by setting the count to zero thereby setting
691 if (sdata->vif.type != NL80211_IFTYPE_STATION)
697 if (count == 1 && ieee80211_powersave_allowed(found)) {
698 struct ieee80211_conf *conf = &local->hw.conf;
702 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
704 beaconint_us = ieee80211_tu_to_usec(
705 found->vif.bss_conf.beacon_int);
707 timeout = local->dynamic_ps_forced_timeout;
710 * Go to full PSM if the user configures a very low
711 * latency requirement.
712 * The 2000 second value is there for compatibility
713 * until the PM_QOS_NETWORK_LATENCY is configured
716 if (latency > (1900 * USEC_PER_MSEC) &&
717 latency != (2000 * USEC_PER_SEC))
722 local->dynamic_ps_user_timeout = timeout;
723 if (!local->disable_dynamic_ps)
724 conf->dynamic_ps_timeout =
725 local->dynamic_ps_user_timeout;
727 if (beaconint_us > latency) {
728 local->ps_sdata = NULL;
730 struct ieee80211_bss *bss;
734 bss = (void *)found->u.mgd.associated->priv;
735 dtimper = bss->dtim_period;
737 /* If the TIM IE is invalid, pretend the value is 1 */
740 else if (dtimper > 1)
741 maxslp = min_t(int, dtimper,
742 latency / beaconint_us);
744 local->hw.conf.max_sleep_period = maxslp;
745 local->hw.conf.ps_dtim_period = dtimper;
746 local->ps_sdata = found;
749 local->ps_sdata = NULL;
753 ieee80211_change_ps(local);
756 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
758 struct ieee80211_local *local =
759 container_of(work, struct ieee80211_local,
760 dynamic_ps_disable_work);
762 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
763 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
764 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
767 ieee80211_wake_queues_by_reason(&local->hw,
768 IEEE80211_QUEUE_STOP_REASON_PS);
771 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
773 struct ieee80211_local *local =
774 container_of(work, struct ieee80211_local,
775 dynamic_ps_enable_work);
776 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
777 struct ieee80211_if_managed *ifmgd;
781 /* can only happen when PS was just disabled anyway */
785 ifmgd = &sdata->u.mgd;
787 if (local->hw.conf.flags & IEEE80211_CONF_PS)
790 if (!local->disable_dynamic_ps &&
791 local->hw.conf.dynamic_ps_timeout > 0) {
792 /* don't enter PS if TX frames are pending */
793 if (drv_tx_frames_pending(local)) {
794 mod_timer(&local->dynamic_ps_timer, jiffies +
796 local->hw.conf.dynamic_ps_timeout));
801 * transmission can be stopped by others which leads to
802 * dynamic_ps_timer expiry. Postpone the ps timer if it
803 * is not the actual idle state.
805 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
806 for (q = 0; q < local->hw.queues; q++) {
807 if (local->queue_stop_reasons[q]) {
808 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
810 mod_timer(&local->dynamic_ps_timer, jiffies +
812 local->hw.conf.dynamic_ps_timeout));
816 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
819 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
820 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
821 netif_tx_stop_all_queues(sdata->dev);
823 if (drv_tx_frames_pending(local))
824 mod_timer(&local->dynamic_ps_timer, jiffies +
826 local->hw.conf.dynamic_ps_timeout));
828 ieee80211_send_nullfunc(local, sdata, 1);
829 /* Flush to get the tx status of nullfunc frame */
830 drv_flush(local, false);
834 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
835 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
836 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
837 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
838 local->hw.conf.flags |= IEEE80211_CONF_PS;
839 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
842 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
843 netif_tx_wake_all_queues(sdata->dev);
846 void ieee80211_dynamic_ps_timer(unsigned long data)
848 struct ieee80211_local *local = (void *) data;
850 if (local->quiescing || local->suspended)
853 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
857 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
858 struct ieee80211_sub_if_data *sdata,
859 u8 *wmm_param, size_t wmm_param_len)
861 struct ieee80211_tx_queue_params params;
862 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
865 u8 *pos, uapsd_queues = 0;
867 if (!local->ops->conf_tx)
870 if (local->hw.queues < 4)
876 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
879 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
880 uapsd_queues = local->uapsd_queues;
882 count = wmm_param[6] & 0x0f;
883 if (count == ifmgd->wmm_last_param_set)
885 ifmgd->wmm_last_param_set = count;
888 left = wmm_param_len - 8;
890 memset(¶ms, 0, sizeof(params));
893 for (; left >= 4; left -= 4, pos += 4) {
894 int aci = (pos[0] >> 5) & 0x03;
895 int acm = (pos[0] >> 4) & 0x01;
903 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
904 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
910 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
911 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
917 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
918 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
925 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
926 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
931 params.aifs = pos[0] & 0x0f;
932 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
933 params.cw_min = ecw2cw(pos[1] & 0x0f);
934 params.txop = get_unaligned_le16(pos + 2);
935 params.uapsd = uapsd;
937 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
938 wiphy_debug(local->hw.wiphy,
939 "WMM queue=%d aci=%d acm=%d aifs=%d "
940 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
942 params.aifs, params.cw_min, params.cw_max,
943 params.txop, params.uapsd);
945 sdata->tx_conf[queue] = params;
946 if (drv_conf_tx(local, sdata, queue, ¶ms))
947 wiphy_debug(local->hw.wiphy,
948 "failed to set TX queue parameters for queue %d\n",
952 /* enable WMM or activate new settings */
953 sdata->vif.bss_conf.qos = true;
954 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
957 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
958 u16 capab, bool erp_valid, u8 erp)
960 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
963 bool use_short_preamble;
967 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
968 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
970 use_protection = false;
971 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
974 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
975 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
976 use_short_slot = true;
978 if (use_protection != bss_conf->use_cts_prot) {
979 bss_conf->use_cts_prot = use_protection;
980 changed |= BSS_CHANGED_ERP_CTS_PROT;
983 if (use_short_preamble != bss_conf->use_short_preamble) {
984 bss_conf->use_short_preamble = use_short_preamble;
985 changed |= BSS_CHANGED_ERP_PREAMBLE;
988 if (use_short_slot != bss_conf->use_short_slot) {
989 bss_conf->use_short_slot = use_short_slot;
990 changed |= BSS_CHANGED_ERP_SLOT;
996 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
997 struct cfg80211_bss *cbss,
998 u32 bss_info_changed)
1000 struct ieee80211_bss *bss = (void *)cbss->priv;
1001 struct ieee80211_local *local = sdata->local;
1002 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1004 bss_info_changed |= BSS_CHANGED_ASSOC;
1005 /* set timing information */
1006 bss_conf->beacon_int = cbss->beacon_interval;
1007 bss_conf->timestamp = cbss->tsf;
1009 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1010 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1011 cbss->capability, bss->has_erp_value, bss->erp_value);
1013 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1014 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1016 sdata->u.mgd.associated = cbss;
1017 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1019 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1021 /* just to be sure */
1022 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1023 IEEE80211_STA_BEACON_POLL);
1025 ieee80211_led_assoc(local, 1);
1027 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1028 bss_conf->dtim_period = bss->dtim_period;
1030 bss_conf->dtim_period = 0;
1032 bss_conf->assoc = 1;
1034 * For now just always ask the driver to update the basic rateset
1035 * when we have associated, we aren't checking whether it actually
1038 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
1040 /* And the BSSID changed - we're associated now */
1041 bss_info_changed |= BSS_CHANGED_BSSID;
1043 /* Tell the driver to monitor connection quality (if supported) */
1044 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
1045 bss_conf->cqm_rssi_thold)
1046 bss_info_changed |= BSS_CHANGED_CQM;
1048 /* Enable ARP filtering */
1049 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1050 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1051 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1054 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1056 mutex_lock(&local->iflist_mtx);
1057 ieee80211_recalc_ps(local, -1);
1058 ieee80211_recalc_smps(local);
1059 mutex_unlock(&local->iflist_mtx);
1061 netif_tx_start_all_queues(sdata->dev);
1062 netif_carrier_on(sdata->dev);
1065 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1066 bool remove_sta, bool tx)
1068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069 struct ieee80211_local *local = sdata->local;
1070 struct sta_info *sta;
1071 u32 changed = 0, config_changed = 0;
1074 ASSERT_MGD_MTX(ifmgd);
1076 if (WARN_ON(!ifmgd->associated))
1079 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1081 ifmgd->associated = NULL;
1082 memset(ifmgd->bssid, 0, ETH_ALEN);
1085 * we need to commit the associated = NULL change because the
1086 * scan code uses that to determine whether this iface should
1087 * go to/wake up from powersave or not -- and could otherwise
1088 * wake the queues erroneously.
1093 * Thus, we can only afterwards stop the queues -- to account
1094 * for the case where another CPU is finishing a scan at this
1095 * time -- we don't want the scan code to enable queues.
1098 netif_tx_stop_all_queues(sdata->dev);
1099 netif_carrier_off(sdata->dev);
1101 mutex_lock(&local->sta_mtx);
1102 sta = sta_info_get(sdata, bssid);
1104 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1105 ieee80211_sta_tear_down_BA_sessions(sta, tx);
1107 mutex_unlock(&local->sta_mtx);
1109 changed |= ieee80211_reset_erp_info(sdata);
1111 ieee80211_led_assoc(local, 0);
1112 changed |= BSS_CHANGED_ASSOC;
1113 sdata->vif.bss_conf.assoc = false;
1115 ieee80211_set_wmm_default(sdata);
1117 /* channel(_type) changes are handled by ieee80211_hw_config */
1118 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1120 /* on the next assoc, re-program HT parameters */
1121 sdata->ht_opmode_valid = false;
1122 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1123 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1125 local->power_constr_level = 0;
1127 del_timer_sync(&local->dynamic_ps_timer);
1128 cancel_work_sync(&local->dynamic_ps_enable_work);
1130 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1131 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1132 config_changed |= IEEE80211_CONF_CHANGE_PS;
1134 local->ps_sdata = NULL;
1136 ieee80211_hw_config(local, config_changed);
1138 /* Disable ARP filtering */
1139 if (sdata->vif.bss_conf.arp_filter_enabled) {
1140 sdata->vif.bss_conf.arp_filter_enabled = false;
1141 changed |= BSS_CHANGED_ARP_FILTER;
1144 /* The BSSID (not really interesting) and HT changed */
1145 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1146 ieee80211_bss_info_change_notify(sdata, changed);
1148 /* remove AP and TDLS peers */
1150 sta_info_flush(local, sdata);
1152 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1153 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1154 del_timer_sync(&sdata->u.mgd.timer);
1155 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1158 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_hdr *hdr)
1162 * We can postpone the mgd.timer whenever receiving unicast frames
1163 * from AP because we know that the connection is working both ways
1164 * at that time. But multicast frames (and hence also beacons) must
1165 * be ignored here, because we need to trigger the timer during
1166 * data idle periods for sending the periodic probe request to the
1167 * AP we're connected to.
1169 if (is_multicast_ether_addr(hdr->addr1))
1172 ieee80211_sta_reset_conn_monitor(sdata);
1175 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1179 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1180 IEEE80211_STA_CONNECTION_POLL)))
1183 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1184 IEEE80211_STA_BEACON_POLL);
1185 mutex_lock(&sdata->local->iflist_mtx);
1186 ieee80211_recalc_ps(sdata->local, -1);
1187 mutex_unlock(&sdata->local->iflist_mtx);
1189 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1193 * We've received a probe response, but are not sure whether
1194 * we have or will be receiving any beacons or data, so let's
1195 * schedule the timers again, just in case.
1197 ieee80211_sta_reset_beacon_monitor(sdata);
1199 mod_timer(&ifmgd->conn_mon_timer,
1200 round_jiffies_up(jiffies +
1201 IEEE80211_CONNECTION_IDLE_TIME));
1204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1205 struct ieee80211_hdr *hdr, bool ack)
1207 if (!ieee80211_is_data(hdr->frame_control))
1211 ieee80211_sta_reset_conn_monitor(sdata);
1213 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1214 sdata->u.mgd.probe_send_count > 0) {
1216 sdata->u.mgd.probe_send_count = 0;
1218 sdata->u.mgd.nullfunc_failed = true;
1219 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1223 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1227 u8 *dst = ifmgd->associated->bssid;
1228 u8 unicast_limit = max(1, max_probe_tries - 3);
1231 * Try sending broadcast probe requests for the last three
1232 * probe requests after the first ones failed since some
1233 * buggy APs only support broadcast probe requests.
1235 if (ifmgd->probe_send_count >= unicast_limit)
1239 * When the hardware reports an accurate Tx ACK status, it's
1240 * better to send a nullfunc frame instead of a probe request,
1241 * as it will kick us off the AP quickly if we aren't associated
1242 * anymore. The timeout will be reset if the frame is ACKed by
1245 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1246 ifmgd->nullfunc_failed = false;
1247 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1249 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1250 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1251 (u32) -1, true, false);
1254 ifmgd->probe_send_count++;
1255 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1256 run_again(ifmgd, ifmgd->probe_timeout);
1259 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1263 bool already = false;
1265 if (!ieee80211_sdata_running(sdata))
1268 if (sdata->local->scanning)
1271 if (sdata->local->tmp_channel)
1274 mutex_lock(&ifmgd->mtx);
1276 if (!ifmgd->associated)
1279 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1280 if (beacon && net_ratelimit())
1281 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1282 "- sending probe request\n", sdata->name);
1286 * The driver/our work has already reported this event or the
1287 * connection monitoring has kicked in and we have already sent
1288 * a probe request. Or maybe the AP died and the driver keeps
1289 * reporting until we disassociate...
1291 * In either case we have to ignore the current call to this
1292 * function (except for setting the correct probe reason bit)
1293 * because otherwise we would reset the timer every time and
1294 * never check whether we received a probe response!
1296 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1297 IEEE80211_STA_CONNECTION_POLL))
1301 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1303 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1308 mutex_lock(&sdata->local->iflist_mtx);
1309 ieee80211_recalc_ps(sdata->local, -1);
1310 mutex_unlock(&sdata->local->iflist_mtx);
1312 ifmgd->probe_send_count = 0;
1313 ieee80211_mgd_probe_ap_send(sdata);
1315 mutex_unlock(&ifmgd->mtx);
1318 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1319 struct ieee80211_vif *vif)
1321 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1323 struct sk_buff *skb;
1326 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1329 ASSERT_MGD_MTX(ifmgd);
1331 if (!ifmgd->associated)
1334 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1335 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1336 (u32) -1, ssid + 2, ssid[1],
1341 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1343 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1346 struct ieee80211_local *local = sdata->local;
1349 mutex_lock(&ifmgd->mtx);
1350 if (!ifmgd->associated) {
1351 mutex_unlock(&ifmgd->mtx);
1355 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1357 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1358 sdata->name, bssid);
1360 ieee80211_set_disassoc(sdata, true, true);
1361 mutex_unlock(&ifmgd->mtx);
1364 * must be outside lock due to cfg80211,
1365 * but that's not a problem.
1367 ieee80211_send_deauth_disassoc(sdata, bssid,
1368 IEEE80211_STYPE_DEAUTH,
1369 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1372 mutex_lock(&local->mtx);
1373 ieee80211_recalc_idle(local);
1374 mutex_unlock(&local->mtx);
1377 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1379 struct ieee80211_sub_if_data *sdata =
1380 container_of(work, struct ieee80211_sub_if_data,
1381 u.mgd.beacon_connection_loss_work);
1383 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1384 __ieee80211_connection_loss(sdata);
1386 ieee80211_mgd_probe_ap(sdata, true);
1389 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1392 struct ieee80211_hw *hw = &sdata->local->hw;
1394 trace_api_beacon_loss(sdata);
1396 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1397 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1399 EXPORT_SYMBOL(ieee80211_beacon_loss);
1401 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1403 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1404 struct ieee80211_hw *hw = &sdata->local->hw;
1406 trace_api_connection_loss(sdata);
1408 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1409 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1411 EXPORT_SYMBOL(ieee80211_connection_loss);
1414 static enum rx_mgmt_action __must_check
1415 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1416 struct ieee80211_mgmt *mgmt, size_t len)
1418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1419 const u8 *bssid = NULL;
1423 return RX_MGMT_NONE;
1425 ASSERT_MGD_MTX(ifmgd);
1427 bssid = ifmgd->associated->bssid;
1429 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1431 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1432 sdata->name, bssid, reason_code);
1434 ieee80211_set_disassoc(sdata, true, false);
1435 mutex_lock(&sdata->local->mtx);
1436 ieee80211_recalc_idle(sdata->local);
1437 mutex_unlock(&sdata->local->mtx);
1439 return RX_MGMT_CFG80211_DEAUTH;
1443 static enum rx_mgmt_action __must_check
1444 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1445 struct ieee80211_mgmt *mgmt, size_t len)
1447 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1451 return RX_MGMT_NONE;
1453 ASSERT_MGD_MTX(ifmgd);
1455 if (WARN_ON(!ifmgd->associated))
1456 return RX_MGMT_NONE;
1458 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1459 return RX_MGMT_NONE;
1461 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1463 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1464 sdata->name, mgmt->sa, reason_code);
1466 ieee80211_set_disassoc(sdata, true, false);
1467 mutex_lock(&sdata->local->mtx);
1468 ieee80211_recalc_idle(sdata->local);
1469 mutex_unlock(&sdata->local->mtx);
1470 return RX_MGMT_CFG80211_DISASSOC;
1473 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1474 u8 *supp_rates, unsigned int supp_rates_len,
1475 u32 *rates, u32 *basic_rates,
1476 bool *have_higher_than_11mbit,
1477 int *min_rate, int *min_rate_index)
1481 for (i = 0; i < supp_rates_len; i++) {
1482 int rate = (supp_rates[i] & 0x7f) * 5;
1483 bool is_basic = !!(supp_rates[i] & 0x80);
1486 *have_higher_than_11mbit = true;
1489 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1490 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1492 * Note: Even through the membership selector and the basic
1493 * rate flag share the same bit, they are not exactly
1496 if (!!(supp_rates[i] & 0x80) &&
1497 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1500 for (j = 0; j < sband->n_bitrates; j++) {
1501 if (sband->bitrates[j].bitrate == rate) {
1504 *basic_rates |= BIT(j);
1505 if (rate < *min_rate) {
1507 *min_rate_index = j;
1515 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1516 struct ieee80211_mgmt *mgmt, size_t len)
1518 struct ieee80211_sub_if_data *sdata = wk->sdata;
1519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1520 struct ieee80211_local *local = sdata->local;
1521 struct ieee80211_supported_band *sband;
1522 struct sta_info *sta;
1523 struct cfg80211_bss *cbss = wk->assoc.bss;
1525 u32 rates, basic_rates;
1526 u16 capab_info, aid;
1527 struct ieee802_11_elems elems;
1528 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1531 bool have_higher_than_11mbit = false;
1532 u16 ap_ht_cap_flags;
1533 int min_rate = INT_MAX, min_rate_index = -1;
1535 /* AssocResp and ReassocResp have identical structure */
1537 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1538 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1540 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1542 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1544 aid &= ~(BIT(15) | BIT(14));
1546 ifmgd->broken_ap = false;
1548 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1550 "%s: invalid AID value %d (out of range), turn off PS\n",
1553 ifmgd->broken_ap = true;
1556 pos = mgmt->u.assoc_resp.variable;
1557 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1559 if (!elems.supp_rates) {
1560 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1567 mutex_lock(&sdata->local->sta_mtx);
1569 * station info was already allocated and inserted before
1570 * the association and should be available to us
1572 sta = sta_info_get_rx(sdata, cbss->bssid);
1573 if (WARN_ON(!sta)) {
1574 mutex_unlock(&sdata->local->sta_mtx);
1578 set_sta_flag(sta, WLAN_STA_AUTH);
1579 set_sta_flag(sta, WLAN_STA_ASSOC);
1580 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1581 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
1585 sband = local->hw.wiphy->bands[wk->chan->band];
1587 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
1588 &rates, &basic_rates, &have_higher_than_11mbit,
1589 &min_rate, &min_rate_index);
1591 ieee80211_get_rates(sband, elems.ext_supp_rates,
1592 elems.ext_supp_rates_len, &rates, &basic_rates,
1593 &have_higher_than_11mbit,
1594 &min_rate, &min_rate_index);
1597 * some buggy APs don't advertise basic_rates. use the lowest
1598 * supported rate instead.
1600 if (unlikely(!basic_rates) && min_rate_index >= 0) {
1601 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
1602 "Using min supported rate instead.\n", sdata->name);
1603 basic_rates = BIT(min_rate_index);
1606 sta->sta.supp_rates[wk->chan->band] = rates;
1607 sdata->vif.bss_conf.basic_rates = basic_rates;
1609 /* cf. IEEE 802.11 9.2.12 */
1610 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
1611 have_higher_than_11mbit)
1612 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1614 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1616 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1617 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1618 elems.ht_cap_elem, &sta->sta.ht_cap);
1620 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1622 rate_control_rate_init(sta);
1624 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1625 set_sta_flag(sta, WLAN_STA_MFP);
1627 if (elems.wmm_param)
1628 set_sta_flag(sta, WLAN_STA_WME);
1630 /* sta_info_reinsert will also unlock the mutex lock */
1631 err = sta_info_reinsert(sta);
1634 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1635 " the AP (error %d)\n", sdata->name, err);
1640 * Always handle WMM once after association regardless
1641 * of the first value the AP uses. Setting -1 here has
1642 * that effect because the AP values is an unsigned
1645 ifmgd->wmm_last_param_set = -1;
1647 if (elems.wmm_param)
1648 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1649 elems.wmm_param_len);
1651 ieee80211_set_wmm_default(sdata);
1653 local->oper_channel = wk->chan;
1655 if (elems.ht_info_elem && elems.wmm_param &&
1656 (sdata->local->hw.queues >= 4) &&
1657 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1658 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1659 cbss->bssid, ap_ht_cap_flags,
1662 /* set AID and assoc capability,
1663 * ieee80211_set_associated() will tell the driver */
1664 bss_conf->aid = aid;
1665 bss_conf->assoc_capability = capab_info;
1666 ieee80211_set_associated(sdata, cbss, changed);
1669 * If we're using 4-addr mode, let the AP know that we're
1670 * doing so, so that it can create the STA VLAN on its side
1672 if (ifmgd->use_4addr)
1673 ieee80211_send_4addr_nullfunc(local, sdata);
1676 * Start timer to probe the connection to the AP now.
1677 * Also start the timer that will detect beacon loss.
1679 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1680 ieee80211_sta_reset_beacon_monitor(sdata);
1686 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1687 struct ieee80211_mgmt *mgmt,
1689 struct ieee80211_rx_status *rx_status,
1690 struct ieee802_11_elems *elems,
1693 struct ieee80211_local *local = sdata->local;
1695 struct ieee80211_bss *bss;
1696 struct ieee80211_channel *channel;
1697 bool need_ps = false;
1699 if (sdata->u.mgd.associated) {
1700 bss = (void *)sdata->u.mgd.associated->priv;
1701 /* not previously set so we may need to recalc */
1702 need_ps = !bss->dtim_period;
1705 if (elems->ds_params && elems->ds_params_len == 1)
1706 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1709 freq = rx_status->freq;
1711 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1713 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1716 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1719 ieee80211_rx_bss_put(local, bss);
1721 if (!sdata->u.mgd.associated)
1725 mutex_lock(&local->iflist_mtx);
1726 ieee80211_recalc_ps(local, -1);
1727 mutex_unlock(&local->iflist_mtx);
1730 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1731 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1733 struct ieee80211_channel_sw_ie *sw_elem =
1734 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1735 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1736 bss, rx_status->mactime);
1741 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1742 struct sk_buff *skb)
1744 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1745 struct ieee80211_if_managed *ifmgd;
1746 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1747 size_t baselen, len = skb->len;
1748 struct ieee802_11_elems elems;
1750 ifmgd = &sdata->u.mgd;
1752 ASSERT_MGD_MTX(ifmgd);
1754 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1755 return; /* ignore ProbeResp to foreign address */
1757 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1761 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1764 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1766 if (ifmgd->associated &&
1767 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1768 ieee80211_reset_ap_probe(sdata);
1772 * This is the canonical list of information elements we care about,
1773 * the filter code also gives us all changes to the Microsoft OUI
1774 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1776 * We implement beacon filtering in software since that means we can
1777 * avoid processing the frame here and in cfg80211, and userspace
1778 * will not be able to tell whether the hardware supports it or not.
1780 * XXX: This list needs to be dynamic -- userspace needs to be able to
1781 * add items it requires. It also needs to be able to tell us to
1782 * look out for other vendor IEs.
1784 static const u64 care_about_ies =
1785 (1ULL << WLAN_EID_COUNTRY) |
1786 (1ULL << WLAN_EID_ERP_INFO) |
1787 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1788 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1789 (1ULL << WLAN_EID_HT_CAPABILITY) |
1790 (1ULL << WLAN_EID_HT_INFORMATION);
1792 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1793 struct ieee80211_mgmt *mgmt,
1795 struct ieee80211_rx_status *rx_status)
1797 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1798 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1800 struct ieee802_11_elems elems;
1801 struct ieee80211_local *local = sdata->local;
1803 bool erp_valid, directed_tim = false;
1808 ASSERT_MGD_MTX(ifmgd);
1810 /* Process beacon from the current BSS */
1811 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1815 if (rx_status->freq != local->hw.conf.channel->center_freq)
1819 * We might have received a number of frames, among them a
1820 * disassoc frame and a beacon...
1822 if (!ifmgd->associated)
1825 bssid = ifmgd->associated->bssid;
1828 * And in theory even frames from a different AP we were just
1829 * associated to a split-second ago!
1831 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1834 /* Track average RSSI from the Beacon frames of the current AP */
1835 ifmgd->last_beacon_signal = rx_status->signal;
1836 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1837 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1838 ifmgd->ave_beacon_signal = rx_status->signal * 16;
1839 ifmgd->last_cqm_event_signal = 0;
1840 ifmgd->count_beacon_signal = 1;
1841 ifmgd->last_ave_beacon_signal = 0;
1843 ifmgd->ave_beacon_signal =
1844 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1845 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1846 ifmgd->ave_beacon_signal) / 16;
1847 ifmgd->count_beacon_signal++;
1850 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1851 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1852 int sig = ifmgd->ave_beacon_signal;
1853 int last_sig = ifmgd->last_ave_beacon_signal;
1856 * if signal crosses either of the boundaries, invoke callback
1857 * with appropriate parameters
1859 if (sig > ifmgd->rssi_max_thold &&
1860 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1861 ifmgd->last_ave_beacon_signal = sig;
1862 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1863 } else if (sig < ifmgd->rssi_min_thold &&
1864 (last_sig >= ifmgd->rssi_max_thold ||
1866 ifmgd->last_ave_beacon_signal = sig;
1867 drv_rssi_callback(local, RSSI_EVENT_LOW);
1871 if (bss_conf->cqm_rssi_thold &&
1872 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
1873 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1874 int sig = ifmgd->ave_beacon_signal / 16;
1875 int last_event = ifmgd->last_cqm_event_signal;
1876 int thold = bss_conf->cqm_rssi_thold;
1877 int hyst = bss_conf->cqm_rssi_hyst;
1879 (last_event == 0 || sig < last_event - hyst)) {
1880 ifmgd->last_cqm_event_signal = sig;
1881 ieee80211_cqm_rssi_notify(
1883 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1885 } else if (sig > thold &&
1886 (last_event == 0 || sig > last_event + hyst)) {
1887 ifmgd->last_cqm_event_signal = sig;
1888 ieee80211_cqm_rssi_notify(
1890 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1895 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1896 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1897 if (net_ratelimit()) {
1898 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1899 "to a received beacon\n", sdata->name);
1902 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1903 mutex_lock(&local->iflist_mtx);
1904 ieee80211_recalc_ps(local, -1);
1905 mutex_unlock(&local->iflist_mtx);
1909 * Push the beacon loss detection into the future since
1910 * we are processing a beacon from the AP just now.
1912 ieee80211_sta_reset_beacon_monitor(sdata);
1914 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1915 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1916 len - baselen, &elems,
1917 care_about_ies, ncrc);
1919 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1920 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1923 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
1924 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1927 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1928 elems.wmm_param_len);
1931 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1933 if (local->hw.conf.dynamic_ps_timeout > 0) {
1934 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1935 ieee80211_hw_config(local,
1936 IEEE80211_CONF_CHANGE_PS);
1937 ieee80211_send_nullfunc(local, sdata, 0);
1939 local->pspolling = true;
1942 * Here is assumed that the driver will be
1943 * able to send ps-poll frame and receive a
1944 * response even though power save mode is
1945 * enabled, but some drivers might require
1946 * to disable power save here. This needs
1947 * to be investigated.
1949 ieee80211_send_pspoll(local, sdata);
1954 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
1956 ifmgd->beacon_crc = ncrc;
1957 ifmgd->beacon_crc_valid = true;
1959 if (elems.erp_info && elems.erp_info_len >= 1) {
1961 erp_value = elems.erp_info[0];
1965 changed |= ieee80211_handle_bss_capability(sdata,
1966 le16_to_cpu(mgmt->u.beacon.capab_info),
1967 erp_valid, erp_value);
1970 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1971 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1972 struct sta_info *sta;
1973 struct ieee80211_supported_band *sband;
1974 u16 ap_ht_cap_flags;
1978 sta = sta_info_get(sdata, bssid);
1979 if (WARN_ON(!sta)) {
1984 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1986 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1987 elems.ht_cap_elem, &sta->sta.ht_cap);
1989 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1993 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1994 bssid, ap_ht_cap_flags, true);
1997 /* Note: country IE parsing is done for us by cfg80211 */
1998 if (elems.country_elem) {
1999 /* TODO: IBSS also needs this */
2000 if (elems.pwr_constr_elem)
2001 ieee80211_handle_pwr_constr(sdata,
2002 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2003 elems.pwr_constr_elem,
2004 elems.pwr_constr_elem_len);
2007 ieee80211_bss_info_change_notify(sdata, changed);
2010 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2011 struct sk_buff *skb)
2013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2014 struct ieee80211_rx_status *rx_status;
2015 struct ieee80211_mgmt *mgmt;
2016 enum rx_mgmt_action rma = RX_MGMT_NONE;
2019 rx_status = (struct ieee80211_rx_status *) skb->cb;
2020 mgmt = (struct ieee80211_mgmt *) skb->data;
2021 fc = le16_to_cpu(mgmt->frame_control);
2023 mutex_lock(&ifmgd->mtx);
2025 if (ifmgd->associated &&
2026 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
2027 switch (fc & IEEE80211_FCTL_STYPE) {
2028 case IEEE80211_STYPE_BEACON:
2029 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2032 case IEEE80211_STYPE_PROBE_RESP:
2033 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2035 case IEEE80211_STYPE_DEAUTH:
2036 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2038 case IEEE80211_STYPE_DISASSOC:
2039 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2041 case IEEE80211_STYPE_ACTION:
2042 switch (mgmt->u.action.category) {
2043 case WLAN_CATEGORY_SPECTRUM_MGMT:
2044 ieee80211_sta_process_chanswitch(sdata,
2045 &mgmt->u.action.u.chan_switch.sw_elem,
2046 (void *)ifmgd->associated->priv,
2047 rx_status->mactime);
2051 mutex_unlock(&ifmgd->mtx);
2057 case RX_MGMT_CFG80211_DEAUTH:
2058 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2060 case RX_MGMT_CFG80211_DISASSOC:
2061 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2064 WARN(1, "unexpected: %d", rma);
2069 mutex_unlock(&ifmgd->mtx);
2071 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2072 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2073 struct ieee80211_local *local = sdata->local;
2074 struct ieee80211_work *wk;
2076 mutex_lock(&local->mtx);
2077 list_for_each_entry(wk, &local->work_list, list) {
2078 if (wk->sdata != sdata)
2081 if (wk->type != IEEE80211_WORK_ASSOC &&
2082 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2085 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2087 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2091 * Printing the message only here means we can't
2092 * spuriously print it, but it also means that it
2093 * won't be printed when the frame comes in before
2094 * we even tried to associate or in similar cases.
2096 * Ultimately, I suspect cfg80211 should print the
2100 "%s: deauthenticated from %pM (Reason: %u)\n",
2101 sdata->name, mgmt->bssid,
2102 le16_to_cpu(mgmt->u.deauth.reason_code));
2104 list_del_rcu(&wk->list);
2108 mutex_unlock(&local->mtx);
2110 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
2114 static void ieee80211_sta_timer(unsigned long data)
2116 struct ieee80211_sub_if_data *sdata =
2117 (struct ieee80211_sub_if_data *) data;
2118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2119 struct ieee80211_local *local = sdata->local;
2121 if (local->quiescing) {
2122 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2126 ieee80211_queue_work(&local->hw, &sdata->work);
2129 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2130 u8 *bssid, u8 reason)
2132 struct ieee80211_local *local = sdata->local;
2133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2135 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2136 IEEE80211_STA_BEACON_POLL);
2138 ieee80211_set_disassoc(sdata, true, true);
2139 mutex_unlock(&ifmgd->mtx);
2141 * must be outside lock due to cfg80211,
2142 * but that's not a problem.
2144 ieee80211_send_deauth_disassoc(sdata, bssid,
2145 IEEE80211_STYPE_DEAUTH, reason,
2148 mutex_lock(&local->mtx);
2149 ieee80211_recalc_idle(local);
2150 mutex_unlock(&local->mtx);
2152 mutex_lock(&ifmgd->mtx);
2155 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
2157 struct ieee80211_local *local = sdata->local;
2158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2160 /* then process the rest of the work */
2161 mutex_lock(&ifmgd->mtx);
2163 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2164 IEEE80211_STA_CONNECTION_POLL) &&
2165 ifmgd->associated) {
2169 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
2171 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2172 max_tries = max_nullfunc_tries;
2174 max_tries = max_probe_tries;
2176 /* ACK received for nullfunc probing frame */
2177 if (!ifmgd->probe_send_count)
2178 ieee80211_reset_ap_probe(sdata);
2179 else if (ifmgd->nullfunc_failed) {
2180 if (ifmgd->probe_send_count < max_tries) {
2181 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2182 wiphy_debug(local->hw.wiphy,
2183 "%s: No ack for nullfunc frame to"
2184 " AP %pM, try %d/%i\n",
2186 ifmgd->probe_send_count, max_tries);
2188 ieee80211_mgd_probe_ap_send(sdata);
2190 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2191 wiphy_debug(local->hw.wiphy,
2192 "%s: No ack for nullfunc frame to"
2193 " AP %pM, disconnecting.\n",
2194 sdata->name, bssid);
2196 ieee80211_sta_connection_lost(sdata, bssid,
2197 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2199 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
2200 run_again(ifmgd, ifmgd->probe_timeout);
2201 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2202 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2203 wiphy_debug(local->hw.wiphy,
2204 "%s: Failed to send nullfunc to AP %pM"
2205 " after %dms, disconnecting.\n",
2207 bssid, probe_wait_ms);
2209 ieee80211_sta_connection_lost(sdata, bssid,
2210 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2211 } else if (ifmgd->probe_send_count < max_tries) {
2212 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2213 wiphy_debug(local->hw.wiphy,
2214 "%s: No probe response from AP %pM"
2215 " after %dms, try %d/%i\n",
2217 bssid, probe_wait_ms,
2218 ifmgd->probe_send_count, max_tries);
2220 ieee80211_mgd_probe_ap_send(sdata);
2223 * We actually lost the connection ... or did we?
2226 wiphy_debug(local->hw.wiphy,
2227 "%s: No probe response from AP %pM"
2228 " after %dms, disconnecting.\n",
2230 bssid, probe_wait_ms);
2232 ieee80211_sta_connection_lost(sdata, bssid,
2233 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2237 mutex_unlock(&ifmgd->mtx);
2240 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2242 struct ieee80211_sub_if_data *sdata =
2243 (struct ieee80211_sub_if_data *) data;
2244 struct ieee80211_local *local = sdata->local;
2246 if (local->quiescing)
2249 ieee80211_queue_work(&sdata->local->hw,
2250 &sdata->u.mgd.beacon_connection_loss_work);
2253 static void ieee80211_sta_conn_mon_timer(unsigned long data)
2255 struct ieee80211_sub_if_data *sdata =
2256 (struct ieee80211_sub_if_data *) data;
2257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2258 struct ieee80211_local *local = sdata->local;
2260 if (local->quiescing)
2263 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
2266 static void ieee80211_sta_monitor_work(struct work_struct *work)
2268 struct ieee80211_sub_if_data *sdata =
2269 container_of(work, struct ieee80211_sub_if_data,
2270 u.mgd.monitor_work);
2272 ieee80211_mgd_probe_ap(sdata, false);
2275 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2277 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2278 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2279 IEEE80211_STA_CONNECTION_POLL);
2281 /* let's probe the connection once */
2282 ieee80211_queue_work(&sdata->local->hw,
2283 &sdata->u.mgd.monitor_work);
2284 /* and do all the other regular work too */
2285 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2290 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2295 * we need to use atomic bitops for the running bits
2296 * only because both timers might fire at the same
2297 * time -- the code here is properly synchronised.
2300 cancel_work_sync(&ifmgd->request_smps_work);
2302 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
2303 if (del_timer_sync(&ifmgd->timer))
2304 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2306 cancel_work_sync(&ifmgd->chswitch_work);
2307 if (del_timer_sync(&ifmgd->chswitch_timer))
2308 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2310 cancel_work_sync(&ifmgd->monitor_work);
2311 /* these will just be re-established on connection */
2312 del_timer_sync(&ifmgd->conn_mon_timer);
2313 del_timer_sync(&ifmgd->bcn_mon_timer);
2316 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2320 if (!ifmgd->associated)
2323 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2324 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2325 mutex_lock(&ifmgd->mtx);
2326 if (ifmgd->associated) {
2327 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2328 wiphy_debug(sdata->local->hw.wiphy,
2329 "%s: driver requested disconnect after resume.\n",
2332 ieee80211_sta_connection_lost(sdata,
2333 ifmgd->associated->bssid,
2334 WLAN_REASON_UNSPECIFIED);
2335 mutex_unlock(&ifmgd->mtx);
2338 mutex_unlock(&ifmgd->mtx);
2341 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2342 add_timer(&ifmgd->timer);
2343 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2344 add_timer(&ifmgd->chswitch_timer);
2345 ieee80211_sta_reset_beacon_monitor(sdata);
2346 ieee80211_restart_sta_timer(sdata);
2347 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
2351 /* interface setup */
2352 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2354 struct ieee80211_if_managed *ifmgd;
2356 ifmgd = &sdata->u.mgd;
2357 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
2358 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2359 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2360 ieee80211_beacon_connection_loss_work);
2361 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
2362 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2363 (unsigned long) sdata);
2364 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2365 (unsigned long) sdata);
2366 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2367 (unsigned long) sdata);
2368 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2369 (unsigned long) sdata);
2373 mutex_init(&ifmgd->mtx);
2375 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2376 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2378 ifmgd->req_smps = IEEE80211_SMPS_OFF;
2381 /* scan finished notification */
2382 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2384 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2386 /* Restart STA timers */
2388 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2389 ieee80211_restart_sta_timer(sdata);
2393 int ieee80211_max_network_latency(struct notifier_block *nb,
2394 unsigned long data, void *dummy)
2396 s32 latency_usec = (s32) data;
2397 struct ieee80211_local *local =
2398 container_of(nb, struct ieee80211_local,
2399 network_latency_notifier);
2401 mutex_lock(&local->iflist_mtx);
2402 ieee80211_recalc_ps(local, latency_usec);
2403 mutex_unlock(&local->iflist_mtx);
2409 static enum work_done_result
2410 ieee80211_probe_auth_done(struct ieee80211_work *wk,
2411 struct sk_buff *skb)
2413 struct ieee80211_local *local = wk->sdata->local;
2416 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2420 if (wk->type == IEEE80211_WORK_AUTH) {
2421 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2425 mutex_lock(&wk->sdata->u.mgd.mtx);
2426 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2427 mutex_unlock(&wk->sdata->u.mgd.mtx);
2429 wk->type = IEEE80211_WORK_AUTH;
2430 wk->probe_auth.tries = 0;
2431 return WORK_DONE_REQUEUE;
2433 if (wk->probe_auth.synced)
2434 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2435 IEEE80211_TX_SYNC_AUTH);
2437 return WORK_DONE_DESTROY;
2440 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2441 struct cfg80211_auth_request *req)
2444 struct ieee80211_work *wk;
2447 if (req->local_state_change)
2448 return 0; /* no need to update mac80211 state */
2450 switch (req->auth_type) {
2451 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2452 auth_alg = WLAN_AUTH_OPEN;
2454 case NL80211_AUTHTYPE_SHARED_KEY:
2455 if (IS_ERR(sdata->local->wep_tx_tfm))
2457 auth_alg = WLAN_AUTH_SHARED_KEY;
2459 case NL80211_AUTHTYPE_FT:
2460 auth_alg = WLAN_AUTH_FT;
2462 case NL80211_AUTHTYPE_NETWORK_EAP:
2463 auth_alg = WLAN_AUTH_LEAP;
2469 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2473 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2475 if (req->ie && req->ie_len) {
2476 memcpy(wk->ie, req->ie, req->ie_len);
2477 wk->ie_len = req->ie_len;
2480 if (req->key && req->key_len) {
2481 wk->probe_auth.key_len = req->key_len;
2482 wk->probe_auth.key_idx = req->key_idx;
2483 memcpy(wk->probe_auth.key, req->key, req->key_len);
2486 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2487 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2488 wk->probe_auth.ssid_len = ssid[1];
2490 wk->probe_auth.algorithm = auth_alg;
2491 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
2493 /* if we already have a probe, don't probe again */
2494 if (req->bss->proberesp_ies)
2495 wk->type = IEEE80211_WORK_AUTH;
2497 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2498 wk->chan = req->bss->channel;
2499 wk->chan_type = NL80211_CHAN_NO_HT;
2501 wk->done = ieee80211_probe_auth_done;
2503 ieee80211_add_work(wk);
2507 /* create and insert a dummy station entry */
2508 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2510 struct sta_info *sta;
2513 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
2519 err = sta_info_insert(sta);
2522 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2523 " the AP (error %d)\n", sdata->name, err);
2530 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2531 struct sk_buff *skb)
2533 struct ieee80211_local *local = wk->sdata->local;
2534 struct ieee80211_mgmt *mgmt;
2535 struct ieee80211_rx_status *rx_status;
2536 struct ieee802_11_elems elems;
2537 struct cfg80211_bss *cbss = wk->assoc.bss;
2541 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2542 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2546 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2547 mutex_lock(&wk->sdata->u.mgd.mtx);
2548 rx_status = (void *) skb->cb;
2549 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2550 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2552 mutex_unlock(&wk->sdata->u.mgd.mtx);
2554 wk->type = IEEE80211_WORK_ASSOC;
2555 /* not really done yet */
2556 return WORK_DONE_REQUEUE;
2559 mgmt = (void *)skb->data;
2560 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2562 if (status == WLAN_STATUS_SUCCESS) {
2563 if (wk->assoc.synced)
2564 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2565 IEEE80211_TX_SYNC_ASSOC);
2567 mutex_lock(&wk->sdata->u.mgd.mtx);
2568 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2569 mutex_unlock(&wk->sdata->u.mgd.mtx);
2570 /* oops -- internal error -- send timeout for now */
2571 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2572 cfg80211_send_assoc_timeout(wk->sdata->dev,
2574 return WORK_DONE_DESTROY;
2577 mutex_unlock(&wk->sdata->u.mgd.mtx);
2579 /* assoc failed - destroy the dummy station entry */
2580 sta_info_destroy_addr(wk->sdata, cbss->bssid);
2583 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2585 if (wk->assoc.synced)
2586 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2587 IEEE80211_TX_SYNC_ASSOC);
2589 return WORK_DONE_DESTROY;
2592 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2593 struct cfg80211_assoc_request *req)
2595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2596 struct ieee80211_bss *bss = (void *)req->bss->priv;
2597 struct ieee80211_work *wk;
2601 mutex_lock(&ifmgd->mtx);
2602 if (ifmgd->associated) {
2603 if (!req->prev_bssid ||
2604 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2607 * We are already associated and the request was not a
2608 * reassociation request from the current BSS, so
2611 mutex_unlock(&ifmgd->mtx);
2615 /* Trying to reassociate - clear previous association state */
2616 ieee80211_set_disassoc(sdata, true, false);
2618 mutex_unlock(&ifmgd->mtx);
2620 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2625 * create a dummy station info entry in order
2626 * to start accepting incoming EAPOL packets from the station
2628 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2634 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2635 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2637 ifmgd->beacon_crc_valid = false;
2639 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2640 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2641 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2642 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2643 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2646 if (req->flags & ASSOC_REQ_DISABLE_HT)
2647 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2649 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
2650 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
2651 sizeof(ifmgd->ht_capa_mask));
2653 if (req->ie && req->ie_len) {
2654 memcpy(wk->ie, req->ie, req->ie_len);
2655 wk->ie_len = req->ie_len;
2659 wk->assoc.bss = req->bss;
2661 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2663 /* new association always uses requested smps mode */
2664 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2665 if (ifmgd->powersave)
2666 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2668 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2670 ifmgd->ap_smps = ifmgd->req_smps;
2672 wk->assoc.smps = ifmgd->ap_smps;
2674 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2675 * We still associate in non-HT mode (11a/b/g) if any one of these
2676 * ciphers is configured as pairwise.
2677 * We can set this to true for non-11n hardware, that'll be checked
2678 * separately along with the peer capabilities.
2680 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2681 wk->assoc.capability = req->bss->capability;
2682 wk->assoc.wmm_used = bss->wmm_used;
2683 wk->assoc.supp_rates = bss->supp_rates;
2684 wk->assoc.supp_rates_len = bss->supp_rates_len;
2685 wk->assoc.ht_information_ie =
2686 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2688 if (bss->wmm_used && bss->uapsd_supported &&
2689 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2690 wk->assoc.uapsd_used = true;
2691 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2693 wk->assoc.uapsd_used = false;
2694 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2697 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2698 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2699 wk->assoc.ssid_len = ssid[1];
2701 if (req->prev_bssid)
2702 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2704 wk->chan = req->bss->channel;
2705 wk->chan_type = NL80211_CHAN_NO_HT;
2707 wk->done = ieee80211_assoc_done;
2708 if (!bss->dtim_period &&
2709 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2710 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2712 wk->type = IEEE80211_WORK_ASSOC;
2715 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2716 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2718 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2719 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2722 if (req->crypto.control_port)
2723 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2725 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2727 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2728 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2730 ieee80211_add_work(wk);
2734 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2735 struct cfg80211_deauth_request *req,
2738 struct ieee80211_local *local = sdata->local;
2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2740 struct ieee80211_work *wk;
2742 bool assoc_bss = false;
2744 mutex_lock(&ifmgd->mtx);
2746 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2747 if (ifmgd->associated == req->bss) {
2748 ieee80211_set_disassoc(sdata, false, true);
2749 mutex_unlock(&ifmgd->mtx);
2752 bool not_auth_yet = false;
2754 mutex_unlock(&ifmgd->mtx);
2756 mutex_lock(&local->mtx);
2757 list_for_each_entry(wk, &local->work_list, list) {
2758 if (wk->sdata != sdata)
2761 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2762 wk->type != IEEE80211_WORK_AUTH &&
2763 wk->type != IEEE80211_WORK_ASSOC &&
2764 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2767 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2770 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2771 list_del_rcu(&wk->list);
2775 mutex_unlock(&local->mtx);
2778 * If somebody requests authentication and we haven't
2779 * sent out an auth frame yet there's no need to send
2780 * out a deauth frame either. If the state was PROBE,
2781 * then this is the case. If it's AUTH we have sent a
2782 * frame, and if it's IDLE we have completed the auth
2786 __cfg80211_auth_canceled(sdata->dev, bssid);
2791 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2792 sdata->name, bssid, req->reason_code);
2794 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2795 req->reason_code, cookie,
2796 !req->local_state_change);
2798 sta_info_flush(sdata->local, sdata);
2800 mutex_lock(&sdata->local->mtx);
2801 ieee80211_recalc_idle(sdata->local);
2802 mutex_unlock(&sdata->local->mtx);
2807 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2808 struct cfg80211_disassoc_request *req,
2811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2814 mutex_lock(&ifmgd->mtx);
2817 * cfg80211 should catch this ... but it's racy since
2818 * we can receive a disassoc frame, process it, hand it
2819 * to cfg80211 while that's in a locked section already
2820 * trying to tell us that the user wants to disconnect.
2822 if (ifmgd->associated != req->bss) {
2823 mutex_unlock(&ifmgd->mtx);
2827 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2828 sdata->name, req->bss->bssid, req->reason_code);
2830 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2831 ieee80211_set_disassoc(sdata, false, true);
2833 mutex_unlock(&ifmgd->mtx);
2835 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2836 IEEE80211_STYPE_DISASSOC, req->reason_code,
2837 cookie, !req->local_state_change);
2838 sta_info_flush(sdata->local, sdata);
2840 mutex_lock(&sdata->local->mtx);
2841 ieee80211_recalc_idle(sdata->local);
2842 mutex_unlock(&sdata->local->mtx);
2847 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2848 enum nl80211_cqm_rssi_threshold_event rssi_event,
2851 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2853 trace_api_cqm_rssi_notify(sdata, rssi_event);
2855 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2857 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
2859 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2862 return sdata->dev->operstate;
2864 EXPORT_SYMBOL(ieee80211_get_operstate);