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mac80211: allow drivers to request SM PS mode change
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / mlme.c
blob38996a44aa8ef9ea221eea71cd01507f2ddf28b6
1 /*
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>
8 *
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.
12 */
13
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>
25
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
28 #include "rate.h"
29 #include "led.h"
30
31 #define IEEE80211_MAX_PROBE_TRIES 5
32
33 /*
34 * beacon loss detection timeout
35 * XXX: should depend on beacon interval
36 */
37 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38 /*
39 * Time the connection can be idle before we probe
40 * it to see if we can still talk to the AP.
41 */
42 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
43 /*
44 * Time we wait for a probe response after sending
45 * a probe request because of beacon loss or for
46 * checking the connection still works.
47 */
48 #define IEEE80211_PROBE_WAIT (HZ / 2)
49
50 /*
51 * Weight given to the latest Beacon frame when calculating average signal
52 * strength for Beacon frames received in the current BSS. This must be
53 * between 1 and 15.
54 */
55 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
56
57 #define TMR_RUNNING_TIMER 0
58 #define TMR_RUNNING_CHANSW 1
59
60 /*
61 * All cfg80211 functions have to be called outside a locked
62 * section so that they can acquire a lock themselves... This
63 * is much simpler than queuing up things in cfg80211, but we
64 * do need some indirection for that here.
65 */
66 enum rx_mgmt_action {
67 /* no action required */
68 RX_MGMT_NONE,
69
70 /* caller must call cfg80211_send_rx_auth() */
71 RX_MGMT_CFG80211_AUTH,
72
73 /* caller must call cfg80211_send_rx_assoc() */
74 RX_MGMT_CFG80211_ASSOC,
75
76 /* caller must call cfg80211_send_deauth() */
77 RX_MGMT_CFG80211_DEAUTH,
78
79 /* caller must call cfg80211_send_disassoc() */
80 RX_MGMT_CFG80211_DISASSOC,
81
82 /* caller must tell cfg80211 about internal error */
83 RX_MGMT_CFG80211_ASSOC_ERROR,
84 };
85
86 /* utils */
87 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
88 {
89 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
90 }
91
92 /*
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
100 * do that.
101 */
102 static void run_again(struct ieee80211_if_managed *ifmgd,
103 unsigned long timeout)
104 {
105 ASSERT_MGD_MTX(ifmgd);
106
107 if (!timer_pending(&ifmgd->timer) ||
108 time_before(timeout, ifmgd->timer.expires))
109 mod_timer(&ifmgd->timer, timeout);
110 }
111
112 static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
113 {
114 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
115 return;
116
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
119 }
120
121 static int ecw2cw(int ecw)
122 {
123 return (1 << ecw) - 1;
124 }
125
126 /*
127 * ieee80211_enable_ht should be called only after the operating band
128 * has been determined as ht configuration depends on the hw's
129 * HT abilities for a specific band.
130 */
131 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
132 struct ieee80211_ht_info *hti,
133 const u8 *bssid, u16 ap_ht_cap_flags)
134 {
135 struct ieee80211_local *local = sdata->local;
136 struct ieee80211_supported_band *sband;
137 struct sta_info *sta;
138 u32 changed = 0;
139 u16 ht_opmode;
140 bool enable_ht = true;
141 enum nl80211_channel_type prev_chantype;
142 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
143
144 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
145
146 prev_chantype = sdata->vif.bss_conf.channel_type;
147
148 /* HT is not supported */
149 if (!sband->ht_cap.ht_supported)
150 enable_ht = false;
151
152 /* check that channel matches the right operating channel */
153 if (local->hw.conf.channel->center_freq !=
154 ieee80211_channel_to_frequency(hti->control_chan))
155 enable_ht = false;
156
157 if (enable_ht) {
158 channel_type = NL80211_CHAN_HT20;
159
160 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
161 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
162 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
163 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
164 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
165 if (!(local->hw.conf.channel->flags &
166 IEEE80211_CHAN_NO_HT40PLUS))
167 channel_type = NL80211_CHAN_HT40PLUS;
168 break;
169 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
170 if (!(local->hw.conf.channel->flags &
171 IEEE80211_CHAN_NO_HT40MINUS))
172 channel_type = NL80211_CHAN_HT40MINUS;
173 break;
174 }
175 }
176 }
177
178 if (local->tmp_channel)
179 local->tmp_channel_type = channel_type;
180
181 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
182 /* can only fail due to HT40+/- mismatch */
183 channel_type = NL80211_CHAN_HT20;
184 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
185 }
186
187 /* channel_type change automatically detected */
188 ieee80211_hw_config(local, 0);
189
190 if (prev_chantype != channel_type) {
191 rcu_read_lock();
192 sta = sta_info_get(sdata, bssid);
193 if (sta)
194 rate_control_rate_update(local, sband, sta,
195 IEEE80211_RC_HT_CHANGED,
196 channel_type);
197 rcu_read_unlock();
198 }
199
200 ht_opmode = le16_to_cpu(hti->operation_mode);
201
202 /* if bss configuration changed store the new one */
203 if (sdata->ht_opmode_valid != enable_ht ||
204 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
205 prev_chantype != channel_type) {
206 changed |= BSS_CHANGED_HT;
207 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
208 sdata->ht_opmode_valid = enable_ht;
209 }
210
211 return changed;
212 }
213
214 /* frame sending functions */
215
216 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
217 const u8 *bssid, u16 stype, u16 reason,
218 void *cookie, bool send_frame)
219 {
220 struct ieee80211_local *local = sdata->local;
221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
222 struct sk_buff *skb;
223 struct ieee80211_mgmt *mgmt;
224
225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
226 if (!skb) {
227 printk(KERN_DEBUG "%s: failed to allocate buffer for "
228 "deauth/disassoc frame\n", sdata->name);
229 return;
230 }
231 skb_reserve(skb, local->hw.extra_tx_headroom);
232
233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
234 memset(mgmt, 0, 24);
235 memcpy(mgmt->da, bssid, ETH_ALEN);
236 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
237 memcpy(mgmt->bssid, bssid, ETH_ALEN);
238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
239 skb_put(skb, 2);
240 /* u.deauth.reason_code == u.disassoc.reason_code */
241 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
242
243 if (stype == IEEE80211_STYPE_DEAUTH)
244 if (cookie)
245 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
246 else
247 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
248 else
249 if (cookie)
250 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
251 else
252 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
253 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
254 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
255
256 if (send_frame)
257 ieee80211_tx_skb(sdata, skb);
258 else
259 kfree_skb(skb);
260 }
261
262 void ieee80211_send_pspoll(struct ieee80211_local *local,
263 struct ieee80211_sub_if_data *sdata)
264 {
265 struct ieee80211_pspoll *pspoll;
266 struct sk_buff *skb;
267
268 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
269 if (!skb)
270 return;
271
272 pspoll = (struct ieee80211_pspoll *) skb->data;
273 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
274
275 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
276 ieee80211_tx_skb(sdata, skb);
277 }
278
279 void ieee80211_send_nullfunc(struct ieee80211_local *local,
280 struct ieee80211_sub_if_data *sdata,
281 int powersave)
282 {
283 struct sk_buff *skb;
284 struct ieee80211_hdr_3addr *nullfunc;
285
286 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
287 if (!skb)
288 return;
289
290 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
291 if (powersave)
292 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
293
294 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
295 ieee80211_tx_skb(sdata, skb);
296 }
297
298 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
299 struct ieee80211_sub_if_data *sdata)
300 {
301 struct sk_buff *skb;
302 struct ieee80211_hdr *nullfunc;
303 __le16 fc;
304
305 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
306 return;
307
308 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
309 if (!skb) {
310 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
311 "nullfunc frame\n", sdata->name);
312 return;
313 }
314 skb_reserve(skb, local->hw.extra_tx_headroom);
315
316 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
317 memset(nullfunc, 0, 30);
318 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
319 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
320 nullfunc->frame_control = fc;
321 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
322 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
323 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
324 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
325
326 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
327 ieee80211_tx_skb(sdata, skb);
328 }
329
330 /* spectrum management related things */
331 static void ieee80211_chswitch_work(struct work_struct *work)
332 {
333 struct ieee80211_sub_if_data *sdata =
334 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
336
337 if (!ieee80211_sdata_running(sdata))
338 return;
339
340 mutex_lock(&ifmgd->mtx);
341 if (!ifmgd->associated)
342 goto out;
343
344 sdata->local->oper_channel = sdata->local->csa_channel;
345 if (!sdata->local->ops->channel_switch) {
346 /* call "hw_config" only if doing sw channel switch */
347 ieee80211_hw_config(sdata->local,
348 IEEE80211_CONF_CHANGE_CHANNEL);
349 }
350
351 /* XXX: shouldn't really modify cfg80211-owned data! */
352 ifmgd->associated->channel = sdata->local->oper_channel;
353
354 ieee80211_wake_queues_by_reason(&sdata->local->hw,
355 IEEE80211_QUEUE_STOP_REASON_CSA);
356 out:
357 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
358 mutex_unlock(&ifmgd->mtx);
359 }
360
361 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
362 {
363 struct ieee80211_sub_if_data *sdata;
364 struct ieee80211_if_managed *ifmgd;
365
366 sdata = vif_to_sdata(vif);
367 ifmgd = &sdata->u.mgd;
368
369 trace_api_chswitch_done(sdata, success);
370 if (!success) {
371 /*
372 * If the channel switch was not successful, stay
373 * around on the old channel. We currently lack
374 * good handling of this situation, possibly we
375 * should just drop the association.
376 */
377 sdata->local->csa_channel = sdata->local->oper_channel;
378 }
379
380 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
381 }
382 EXPORT_SYMBOL(ieee80211_chswitch_done);
383
384 static void ieee80211_chswitch_timer(unsigned long data)
385 {
386 struct ieee80211_sub_if_data *sdata =
387 (struct ieee80211_sub_if_data *) data;
388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
389
390 if (sdata->local->quiescing) {
391 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
392 return;
393 }
394
395 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
396 }
397
398 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
399 struct ieee80211_channel_sw_ie *sw_elem,
400 struct ieee80211_bss *bss,
401 u64 timestamp)
402 {
403 struct cfg80211_bss *cbss =
404 container_of((void *)bss, struct cfg80211_bss, priv);
405 struct ieee80211_channel *new_ch;
406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
407 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
408
409 ASSERT_MGD_MTX(ifmgd);
410
411 if (!ifmgd->associated)
412 return;
413
414 if (sdata->local->scanning)
415 return;
416
417 /* Disregard subsequent beacons if we are already running a timer
418 processing a CSA */
419
420 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
421 return;
422
423 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
424 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
425 return;
426
427 sdata->local->csa_channel = new_ch;
428
429 if (sdata->local->ops->channel_switch) {
430 /* use driver's channel switch callback */
431 struct ieee80211_channel_switch ch_switch;
432 memset(&ch_switch, 0, sizeof(ch_switch));
433 ch_switch.timestamp = timestamp;
434 if (sw_elem->mode) {
435 ch_switch.block_tx = true;
436 ieee80211_stop_queues_by_reason(&sdata->local->hw,
437 IEEE80211_QUEUE_STOP_REASON_CSA);
438 }
439 ch_switch.channel = new_ch;
440 ch_switch.count = sw_elem->count;
441 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
442 drv_channel_switch(sdata->local, &ch_switch);
443 return;
444 }
445
446 /* channel switch handled in software */
447 if (sw_elem->count <= 1) {
448 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
449 } else {
450 if (sw_elem->mode)
451 ieee80211_stop_queues_by_reason(&sdata->local->hw,
452 IEEE80211_QUEUE_STOP_REASON_CSA);
453 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
454 mod_timer(&ifmgd->chswitch_timer,
455 jiffies +
456 msecs_to_jiffies(sw_elem->count *
457 cbss->beacon_interval));
458 }
459 }
460
461 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
462 u16 capab_info, u8 *pwr_constr_elem,
463 u8 pwr_constr_elem_len)
464 {
465 struct ieee80211_conf *conf = &sdata->local->hw.conf;
466
467 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
468 return;
469
470 /* Power constraint IE length should be 1 octet */
471 if (pwr_constr_elem_len != 1)
472 return;
473
474 if ((*pwr_constr_elem <= conf->channel->max_power) &&
475 (*pwr_constr_elem != sdata->local->power_constr_level)) {
476 sdata->local->power_constr_level = *pwr_constr_elem;
477 ieee80211_hw_config(sdata->local, 0);
478 }
479 }
480
481 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
482 {
483 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
484 struct ieee80211_local *local = sdata->local;
485 struct ieee80211_conf *conf = &local->hw.conf;
486
487 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
488 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
489 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
490
491 local->disable_dynamic_ps = false;
492 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
493 }
494 EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
495
496 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
497 {
498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
499 struct ieee80211_local *local = sdata->local;
500 struct ieee80211_conf *conf = &local->hw.conf;
501
502 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
503 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
504 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
505
506 local->disable_dynamic_ps = true;
507 conf->dynamic_ps_timeout = 0;
508 del_timer_sync(&local->dynamic_ps_timer);
509 ieee80211_queue_work(&local->hw,
510 &local->dynamic_ps_enable_work);
511 }
512 EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
513
514 /* powersave */
515 static void ieee80211_enable_ps(struct ieee80211_local *local,
516 struct ieee80211_sub_if_data *sdata)
517 {
518 struct ieee80211_conf *conf = &local->hw.conf;
519
520 /*
521 * If we are scanning right now then the parameters will
522 * take effect when scan finishes.
523 */
524 if (local->scanning)
525 return;
526
527 if (conf->dynamic_ps_timeout > 0 &&
528 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
529 mod_timer(&local->dynamic_ps_timer, jiffies +
530 msecs_to_jiffies(conf->dynamic_ps_timeout));
531 } else {
532 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
533 ieee80211_send_nullfunc(local, sdata, 1);
534
535 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
536 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
537 return;
538
539 conf->flags |= IEEE80211_CONF_PS;
540 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
541 }
542 }
543
544 static void ieee80211_change_ps(struct ieee80211_local *local)
545 {
546 struct ieee80211_conf *conf = &local->hw.conf;
547
548 if (local->ps_sdata) {
549 ieee80211_enable_ps(local, local->ps_sdata);
550 } else if (conf->flags & IEEE80211_CONF_PS) {
551 conf->flags &= ~IEEE80211_CONF_PS;
552 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
553 del_timer_sync(&local->dynamic_ps_timer);
554 cancel_work_sync(&local->dynamic_ps_enable_work);
555 }
556 }
557
558 /* need to hold RTNL or interface lock */
559 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
560 {
561 struct ieee80211_sub_if_data *sdata, *found = NULL;
562 int count = 0;
563 int timeout;
564
565 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
566 local->ps_sdata = NULL;
567 return;
568 }
569
570 if (!list_empty(&local->work_list)) {
571 local->ps_sdata = NULL;
572 goto change;
573 }
574
575 list_for_each_entry(sdata, &local->interfaces, list) {
576 if (!ieee80211_sdata_running(sdata))
577 continue;
578 if (sdata->vif.type != NL80211_IFTYPE_STATION)
579 continue;
580 found = sdata;
581 count++;
582 }
583
584 if (count == 1 && found->u.mgd.powersave &&
585 found->u.mgd.associated &&
586 found->u.mgd.associated->beacon_ies &&
587 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
588 IEEE80211_STA_CONNECTION_POLL))) {
589 struct ieee80211_conf *conf = &local->hw.conf;
590 s32 beaconint_us;
591
592 if (latency < 0)
593 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
594
595 beaconint_us = ieee80211_tu_to_usec(
596 found->vif.bss_conf.beacon_int);
597
598 timeout = local->dynamic_ps_forced_timeout;
599 if (timeout < 0) {
600 /*
601 * Go to full PSM if the user configures a very low
602 * latency requirement.
603 * The 2 second value is there for compatibility until
604 * the PM_QOS_NETWORK_LATENCY is configured with real
605 * values.
606 */
607 if (latency > 1900000000 && latency != 2000000000)
608 timeout = 0;
609 else
610 timeout = 100;
611 }
612 local->dynamic_ps_user_timeout = timeout;
613 if (!local->disable_dynamic_ps)
614 conf->dynamic_ps_timeout =
615 local->dynamic_ps_user_timeout;
616
617 if (beaconint_us > latency) {
618 local->ps_sdata = NULL;
619 } else {
620 struct ieee80211_bss *bss;
621 int maxslp = 1;
622 u8 dtimper;
623
624 bss = (void *)found->u.mgd.associated->priv;
625 dtimper = bss->dtim_period;
626
627 /* If the TIM IE is invalid, pretend the value is 1 */
628 if (!dtimper)
629 dtimper = 1;
630 else if (dtimper > 1)
631 maxslp = min_t(int, dtimper,
632 latency / beaconint_us);
633
634 local->hw.conf.max_sleep_period = maxslp;
635 local->hw.conf.ps_dtim_period = dtimper;
636 local->ps_sdata = found;
637 }
638 } else {
639 local->ps_sdata = NULL;
640 }
641
642 change:
643 ieee80211_change_ps(local);
644 }
645
646 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
647 {
648 struct ieee80211_local *local =
649 container_of(work, struct ieee80211_local,
650 dynamic_ps_disable_work);
651
652 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
653 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
654 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
655 }
656
657 ieee80211_wake_queues_by_reason(&local->hw,
658 IEEE80211_QUEUE_STOP_REASON_PS);
659 }
660
661 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
662 {
663 struct ieee80211_local *local =
664 container_of(work, struct ieee80211_local,
665 dynamic_ps_enable_work);
666 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
668
669 /* can only happen when PS was just disabled anyway */
670 if (!sdata)
671 return;
672
673 if (local->hw.conf.flags & IEEE80211_CONF_PS)
674 return;
675
676 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
677 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
678 ieee80211_send_nullfunc(local, sdata, 1);
679
680 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
681 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
682 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
683 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
684 local->hw.conf.flags |= IEEE80211_CONF_PS;
685 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
686 }
687 }
688
689 void ieee80211_dynamic_ps_timer(unsigned long data)
690 {
691 struct ieee80211_local *local = (void *) data;
692
693 if (local->quiescing || local->suspended)
694 return;
695
696 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
697 }
698
699 /* MLME */
700 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
701 struct ieee80211_sub_if_data *sdata,
702 u8 *wmm_param, size_t wmm_param_len)
703 {
704 struct ieee80211_tx_queue_params params;
705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
706 size_t left;
707 int count;
708 u8 *pos, uapsd_queues = 0;
709
710 if (!local->ops->conf_tx)
711 return;
712
713 if (local->hw.queues < 4)
714 return;
715
716 if (!wmm_param)
717 return;
718
719 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
720 return;
721
722 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
723 uapsd_queues = local->uapsd_queues;
724
725 count = wmm_param[6] & 0x0f;
726 if (count == ifmgd->wmm_last_param_set)
727 return;
728 ifmgd->wmm_last_param_set = count;
729
730 pos = wmm_param + 8;
731 left = wmm_param_len - 8;
732
733 memset(&params, 0, sizeof(params));
734
735 local->wmm_acm = 0;
736 for (; left >= 4; left -= 4, pos += 4) {
737 int aci = (pos[0] >> 5) & 0x03;
738 int acm = (pos[0] >> 4) & 0x01;
739 bool uapsd = false;
740 int queue;
741
742 switch (aci) {
743 case 1: /* AC_BK */
744 queue = 3;
745 if (acm)
746 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
747 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
748 uapsd = true;
749 break;
750 case 2: /* AC_VI */
751 queue = 1;
752 if (acm)
753 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
754 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
755 uapsd = true;
756 break;
757 case 3: /* AC_VO */
758 queue = 0;
759 if (acm)
760 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
761 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
762 uapsd = true;
763 break;
764 case 0: /* AC_BE */
765 default:
766 queue = 2;
767 if (acm)
768 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
770 uapsd = true;
771 break;
772 }
773
774 params.aifs = pos[0] & 0x0f;
775 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
776 params.cw_min = ecw2cw(pos[1] & 0x0f);
777 params.txop = get_unaligned_le16(pos + 2);
778 params.uapsd = uapsd;
779
780 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
781 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
782 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
783 wiphy_name(local->hw.wiphy), queue, aci, acm,
784 params.aifs, params.cw_min, params.cw_max, params.txop,
785 params.uapsd);
786 #endif
787 if (drv_conf_tx(local, queue, &params))
788 printk(KERN_DEBUG "%s: failed to set TX queue "
789 "parameters for queue %d\n",
790 wiphy_name(local->hw.wiphy), queue);
791 }
792
793 /* enable WMM or activate new settings */
794 sdata->vif.bss_conf.qos = true;
795 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
796 }
797
798 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
799 u16 capab, bool erp_valid, u8 erp)
800 {
801 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
802 u32 changed = 0;
803 bool use_protection;
804 bool use_short_preamble;
805 bool use_short_slot;
806
807 if (erp_valid) {
808 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
809 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
810 } else {
811 use_protection = false;
812 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
813 }
814
815 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
816 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
817 use_short_slot = true;
818
819 if (use_protection != bss_conf->use_cts_prot) {
820 bss_conf->use_cts_prot = use_protection;
821 changed |= BSS_CHANGED_ERP_CTS_PROT;
822 }
823
824 if (use_short_preamble != bss_conf->use_short_preamble) {
825 bss_conf->use_short_preamble = use_short_preamble;
826 changed |= BSS_CHANGED_ERP_PREAMBLE;
827 }
828
829 if (use_short_slot != bss_conf->use_short_slot) {
830 bss_conf->use_short_slot = use_short_slot;
831 changed |= BSS_CHANGED_ERP_SLOT;
832 }
833
834 return changed;
835 }
836
837 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
838 struct cfg80211_bss *cbss,
839 u32 bss_info_changed)
840 {
841 struct ieee80211_bss *bss = (void *)cbss->priv;
842 struct ieee80211_local *local = sdata->local;
843 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
844
845 bss_info_changed |= BSS_CHANGED_ASSOC;
846 /* set timing information */
847 bss_conf->beacon_int = cbss->beacon_interval;
848 bss_conf->timestamp = cbss->tsf;
849
850 bss_info_changed |= BSS_CHANGED_BEACON_INT;
851 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
852 cbss->capability, bss->has_erp_value, bss->erp_value);
853
854 sdata->u.mgd.associated = cbss;
855 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
856
857 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
858
859 /* just to be sure */
860 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
861 IEEE80211_STA_BEACON_POLL);
862
863 /*
864 * Always handle WMM once after association regardless
865 * of the first value the AP uses. Setting -1 here has
866 * that effect because the AP values is an unsigned
867 * 4-bit value.
868 */
869 sdata->u.mgd.wmm_last_param_set = -1;
870
871 ieee80211_led_assoc(local, 1);
872
873 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
874 bss_conf->dtim_period = bss->dtim_period;
875 else
876 bss_conf->dtim_period = 0;
877
878 bss_conf->assoc = 1;
879 /*
880 * For now just always ask the driver to update the basic rateset
881 * when we have associated, we aren't checking whether it actually
882 * changed or not.
883 */
884 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
885
886 /* And the BSSID changed - we're associated now */
887 bss_info_changed |= BSS_CHANGED_BSSID;
888
889 /* Tell the driver to monitor connection quality (if supported) */
890 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
891 bss_conf->cqm_rssi_thold)
892 bss_info_changed |= BSS_CHANGED_CQM;
893
894 /* Enable ARP filtering */
895 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
896 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
897 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
898 }
899
900 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
901
902 mutex_lock(&local->iflist_mtx);
903 ieee80211_recalc_ps(local, -1);
904 ieee80211_recalc_smps(local, sdata);
905 mutex_unlock(&local->iflist_mtx);
906
907 netif_tx_start_all_queues(sdata->dev);
908 netif_carrier_on(sdata->dev);
909 }
910
911 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
912 bool remove_sta)
913 {
914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
915 struct ieee80211_local *local = sdata->local;
916 struct sta_info *sta;
917 u32 changed = 0, config_changed = 0;
918 u8 bssid[ETH_ALEN];
919
920 ASSERT_MGD_MTX(ifmgd);
921
922 if (WARN_ON(!ifmgd->associated))
923 return;
924
925 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
926
927 ifmgd->associated = NULL;
928 memset(ifmgd->bssid, 0, ETH_ALEN);
929
930 /*
931 * we need to commit the associated = NULL change because the
932 * scan code uses that to determine whether this iface should
933 * go to/wake up from powersave or not -- and could otherwise
934 * wake the queues erroneously.
935 */
936 smp_mb();
937
938 /*
939 * Thus, we can only afterwards stop the queues -- to account
940 * for the case where another CPU is finishing a scan at this
941 * time -- we don't want the scan code to enable queues.
942 */
943
944 netif_tx_stop_all_queues(sdata->dev);
945 netif_carrier_off(sdata->dev);
946
947 mutex_lock(&local->sta_mtx);
948 sta = sta_info_get(sdata, bssid);
949 if (sta) {
950 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
951 ieee80211_sta_tear_down_BA_sessions(sta);
952 }
953 mutex_unlock(&local->sta_mtx);
954
955 changed |= ieee80211_reset_erp_info(sdata);
956
957 ieee80211_led_assoc(local, 0);
958 changed |= BSS_CHANGED_ASSOC;
959 sdata->vif.bss_conf.assoc = false;
960
961 ieee80211_set_wmm_default(sdata);
962
963 /* channel(_type) changes are handled by ieee80211_hw_config */
964 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
965
966 /* on the next assoc, re-program HT parameters */
967 sdata->ht_opmode_valid = false;
968
969 local->power_constr_level = 0;
970
971 del_timer_sync(&local->dynamic_ps_timer);
972 cancel_work_sync(&local->dynamic_ps_enable_work);
973
974 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
975 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
976 config_changed |= IEEE80211_CONF_CHANGE_PS;
977 }
978
979 ieee80211_hw_config(local, config_changed);
980
981 /* Disable ARP filtering */
982 if (sdata->vif.bss_conf.arp_filter_enabled) {
983 sdata->vif.bss_conf.arp_filter_enabled = false;
984 changed |= BSS_CHANGED_ARP_FILTER;
985 }
986
987 /* The BSSID (not really interesting) and HT changed */
988 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
989 ieee80211_bss_info_change_notify(sdata, changed);
990
991 if (remove_sta)
992 sta_info_destroy_addr(sdata, bssid);
993 }
994
995 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
996 struct ieee80211_hdr *hdr)
997 {
998 /*
999 * We can postpone the mgd.timer whenever receiving unicast frames
1000 * from AP because we know that the connection is working both ways
1001 * at that time. But multicast frames (and hence also beacons) must
1002 * be ignored here, because we need to trigger the timer during
1003 * data idle periods for sending the periodic probe request to the
1004 * AP we're connected to.
1005 */
1006 if (is_multicast_ether_addr(hdr->addr1))
1007 return;
1008
1009 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1010 return;
1011
1012 mod_timer(&sdata->u.mgd.conn_mon_timer,
1013 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
1014 }
1015
1016 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1017 {
1018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1019 const u8 *ssid;
1020
1021 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1022 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
1023 ssid + 2, ssid[1], NULL, 0);
1024
1025 ifmgd->probe_send_count++;
1026 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1027 run_again(ifmgd, ifmgd->probe_timeout);
1028 }
1029
1030 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1031 bool beacon)
1032 {
1033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1034 bool already = false;
1035
1036 if (!ieee80211_sdata_running(sdata))
1037 return;
1038
1039 if (sdata->local->scanning)
1040 return;
1041
1042 if (sdata->local->tmp_channel)
1043 return;
1044
1045 mutex_lock(&ifmgd->mtx);
1046
1047 if (!ifmgd->associated)
1048 goto out;
1049
1050 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1051 if (beacon && net_ratelimit())
1052 printk(KERN_DEBUG "%s: detected beacon loss from AP "
1053 "- sending probe request\n", sdata->name);
1054 #endif
1055
1056 /*
1057 * The driver/our work has already reported this event or the
1058 * connection monitoring has kicked in and we have already sent
1059 * a probe request. Or maybe the AP died and the driver keeps
1060 * reporting until we disassociate...
1061 *
1062 * In either case we have to ignore the current call to this
1063 * function (except for setting the correct probe reason bit)
1064 * because otherwise we would reset the timer every time and
1065 * never check whether we received a probe response!
1066 */
1067 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1068 IEEE80211_STA_CONNECTION_POLL))
1069 already = true;
1070
1071 if (beacon)
1072 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1073 else
1074 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1075
1076 if (already)
1077 goto out;
1078
1079 mutex_lock(&sdata->local->iflist_mtx);
1080 ieee80211_recalc_ps(sdata->local, -1);
1081 mutex_unlock(&sdata->local->iflist_mtx);
1082
1083 ifmgd->probe_send_count = 0;
1084 ieee80211_mgd_probe_ap_send(sdata);
1085 out:
1086 mutex_unlock(&ifmgd->mtx);
1087 }
1088
1089 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1090 {
1091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1092 struct ieee80211_local *local = sdata->local;
1093 u8 bssid[ETH_ALEN];
1094
1095 mutex_lock(&ifmgd->mtx);
1096 if (!ifmgd->associated) {
1097 mutex_unlock(&ifmgd->mtx);
1098 return;
1099 }
1100
1101 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1102
1103 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1104
1105 ieee80211_set_disassoc(sdata, true);
1106 mutex_unlock(&ifmgd->mtx);
1107
1108 mutex_lock(&local->mtx);
1109 ieee80211_recalc_idle(local);
1110 mutex_unlock(&local->mtx);
1111 /*
1112 * must be outside lock due to cfg80211,
1113 * but that's not a problem.
1114 */
1115 ieee80211_send_deauth_disassoc(sdata, bssid,
1116 IEEE80211_STYPE_DEAUTH,
1117 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1118 NULL, true);
1119 }
1120
1121 void ieee80211_beacon_connection_loss_work(struct work_struct *work)
1122 {
1123 struct ieee80211_sub_if_data *sdata =
1124 container_of(work, struct ieee80211_sub_if_data,
1125 u.mgd.beacon_connection_loss_work);
1126
1127 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1128 __ieee80211_connection_loss(sdata);
1129 else
1130 ieee80211_mgd_probe_ap(sdata, true);
1131 }
1132
1133 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1134 {
1135 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1136 struct ieee80211_hw *hw = &sdata->local->hw;
1137
1138 trace_api_beacon_loss(sdata);
1139
1140 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1141 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1142 }
1143 EXPORT_SYMBOL(ieee80211_beacon_loss);
1144
1145 void ieee80211_connection_loss(struct ieee80211_vif *vif)
1146 {
1147 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1148 struct ieee80211_hw *hw = &sdata->local->hw;
1149
1150 trace_api_connection_loss(sdata);
1151
1152 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1153 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1154 }
1155 EXPORT_SYMBOL(ieee80211_connection_loss);
1156
1157
1158 static enum rx_mgmt_action __must_check
1159 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1160 struct ieee80211_mgmt *mgmt, size_t len)
1161 {
1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1163 const u8 *bssid = NULL;
1164 u16 reason_code;
1165
1166 if (len < 24 + 2)
1167 return RX_MGMT_NONE;
1168
1169 ASSERT_MGD_MTX(ifmgd);
1170
1171 bssid = ifmgd->associated->bssid;
1172
1173 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1174
1175 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1176 sdata->name, bssid, reason_code);
1177
1178 ieee80211_set_disassoc(sdata, true);
1179 mutex_lock(&sdata->local->mtx);
1180 ieee80211_recalc_idle(sdata->local);
1181 mutex_unlock(&sdata->local->mtx);
1182
1183 return RX_MGMT_CFG80211_DEAUTH;
1184 }
1185
1186
1187 static enum rx_mgmt_action __must_check
1188 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1189 struct ieee80211_mgmt *mgmt, size_t len)
1190 {
1191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1192 u16 reason_code;
1193
1194 if (len < 24 + 2)
1195 return RX_MGMT_NONE;
1196
1197 ASSERT_MGD_MTX(ifmgd);
1198
1199 if (WARN_ON(!ifmgd->associated))
1200 return RX_MGMT_NONE;
1201
1202 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
1203 return RX_MGMT_NONE;
1204
1205 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1206
1207 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1208 sdata->name, mgmt->sa, reason_code);
1209
1210 ieee80211_set_disassoc(sdata, true);
1211 mutex_lock(&sdata->local->mtx);
1212 ieee80211_recalc_idle(sdata->local);
1213 mutex_unlock(&sdata->local->mtx);
1214 return RX_MGMT_CFG80211_DISASSOC;
1215 }
1216
1217
1218 static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1219 struct ieee80211_mgmt *mgmt, size_t len)
1220 {
1221 struct ieee80211_sub_if_data *sdata = wk->sdata;
1222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1223 struct ieee80211_local *local = sdata->local;
1224 struct ieee80211_supported_band *sband;
1225 struct sta_info *sta;
1226 struct cfg80211_bss *cbss = wk->assoc.bss;
1227 u8 *pos;
1228 u32 rates, basic_rates;
1229 u16 capab_info, aid;
1230 struct ieee802_11_elems elems;
1231 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1232 u32 changed = 0;
1233 int i, j, err;
1234 bool have_higher_than_11mbit = false;
1235 u16 ap_ht_cap_flags;
1236
1237 /* AssocResp and ReassocResp have identical structure */
1238
1239 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1240 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1241
1242 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1243 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1244 "set\n", sdata->name, aid);
1245 aid &= ~(BIT(15) | BIT(14));
1246
1247 pos = mgmt->u.assoc_resp.variable;
1248 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1249
1250 if (!elems.supp_rates) {
1251 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1252 sdata->name);
1253 return false;
1254 }
1255
1256 ifmgd->aid = aid;
1257
1258 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
1259 if (!sta) {
1260 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1261 " the AP\n", sdata->name);
1262 return false;
1263 }
1264
1265 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1266 WLAN_STA_ASSOC_AP);
1267 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1268 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1269
1270 rates = 0;
1271 basic_rates = 0;
1272 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1273
1274 for (i = 0; i < elems.supp_rates_len; i++) {
1275 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1276 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1277
1278 if (rate > 110)
1279 have_higher_than_11mbit = true;
1280
1281 for (j = 0; j < sband->n_bitrates; j++) {
1282 if (sband->bitrates[j].bitrate == rate) {
1283 rates |= BIT(j);
1284 if (is_basic)
1285 basic_rates |= BIT(j);
1286 break;
1287 }
1288 }
1289 }
1290
1291 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1292 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1293 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1294
1295 if (rate > 110)
1296 have_higher_than_11mbit = true;
1297
1298 for (j = 0; j < sband->n_bitrates; j++) {
1299 if (sband->bitrates[j].bitrate == rate) {
1300 rates |= BIT(j);
1301 if (is_basic)
1302 basic_rates |= BIT(j);
1303 break;
1304 }
1305 }
1306 }
1307
1308 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1309 sdata->vif.bss_conf.basic_rates = basic_rates;
1310
1311 /* cf. IEEE 802.11 9.2.12 */
1312 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1313 have_higher_than_11mbit)
1314 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1315 else
1316 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1317
1318 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1319 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1320 elems.ht_cap_elem, &sta->sta.ht_cap);
1321
1322 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1323
1324 rate_control_rate_init(sta);
1325
1326 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1327 set_sta_flags(sta, WLAN_STA_MFP);
1328
1329 if (elems.wmm_param)
1330 set_sta_flags(sta, WLAN_STA_WME);
1331
1332 err = sta_info_insert(sta);
1333 sta = NULL;
1334 if (err) {
1335 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1336 " the AP (error %d)\n", sdata->name, err);
1337 return false;
1338 }
1339
1340 if (elems.wmm_param)
1341 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1342 elems.wmm_param_len);
1343 else
1344 ieee80211_set_wmm_default(sdata);
1345
1346 local->oper_channel = wk->chan;
1347
1348 if (elems.ht_info_elem && elems.wmm_param &&
1349 (sdata->local->hw.queues >= 4) &&
1350 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
1351 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1352 cbss->bssid, ap_ht_cap_flags);
1353
1354 /* set AID and assoc capability,
1355 * ieee80211_set_associated() will tell the driver */
1356 bss_conf->aid = aid;
1357 bss_conf->assoc_capability = capab_info;
1358 ieee80211_set_associated(sdata, cbss, changed);
1359
1360 /*
1361 * If we're using 4-addr mode, let the AP know that we're
1362 * doing so, so that it can create the STA VLAN on its side
1363 */
1364 if (ifmgd->use_4addr)
1365 ieee80211_send_4addr_nullfunc(local, sdata);
1366
1367 /*
1368 * Start timer to probe the connection to the AP now.
1369 * Also start the timer that will detect beacon loss.
1370 */
1371 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1372 mod_beacon_timer(sdata);
1373
1374 return true;
1375 }
1376
1377
1378 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1379 struct ieee80211_mgmt *mgmt,
1380 size_t len,
1381 struct ieee80211_rx_status *rx_status,
1382 struct ieee802_11_elems *elems,
1383 bool beacon)
1384 {
1385 struct ieee80211_local *local = sdata->local;
1386 int freq;
1387 struct ieee80211_bss *bss;
1388 struct ieee80211_channel *channel;
1389 bool need_ps = false;
1390
1391 if (sdata->u.mgd.associated) {
1392 bss = (void *)sdata->u.mgd.associated->priv;
1393 /* not previously set so we may need to recalc */
1394 need_ps = !bss->dtim_period;
1395 }
1396
1397 if (elems->ds_params && elems->ds_params_len == 1)
1398 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1399 else
1400 freq = rx_status->freq;
1401
1402 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1403
1404 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1405 return;
1406
1407 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1408 channel, beacon);
1409 if (bss)
1410 ieee80211_rx_bss_put(local, bss);
1411
1412 if (!sdata->u.mgd.associated)
1413 return;
1414
1415 if (need_ps) {
1416 mutex_lock(&local->iflist_mtx);
1417 ieee80211_recalc_ps(local, -1);
1418 mutex_unlock(&local->iflist_mtx);
1419 }
1420
1421 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1422 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
1423 ETH_ALEN) == 0)) {
1424 struct ieee80211_channel_sw_ie *sw_elem =
1425 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1426 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1427 bss, rx_status->mactime);
1428 }
1429 }
1430
1431
1432 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1433 struct sk_buff *skb)
1434 {
1435 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1436 struct ieee80211_if_managed *ifmgd;
1437 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1438 size_t baselen, len = skb->len;
1439 struct ieee802_11_elems elems;
1440
1441 ifmgd = &sdata->u.mgd;
1442
1443 ASSERT_MGD_MTX(ifmgd);
1444
1445 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
1446 return; /* ignore ProbeResp to foreign address */
1447
1448 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1449 if (baselen > len)
1450 return;
1451
1452 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1453 &elems);
1454
1455 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1456
1457 if (ifmgd->associated &&
1458 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
1459 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1460 IEEE80211_STA_CONNECTION_POLL)) {
1461 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1462 IEEE80211_STA_BEACON_POLL);
1463 mutex_lock(&sdata->local->iflist_mtx);
1464 ieee80211_recalc_ps(sdata->local, -1);
1465 mutex_unlock(&sdata->local->iflist_mtx);
1466
1467 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1468 return;
1469
1470 /*
1471 * We've received a probe response, but are not sure whether
1472 * we have or will be receiving any beacons or data, so let's
1473 * schedule the timers again, just in case.
1474 */
1475 mod_beacon_timer(sdata);
1476
1477 mod_timer(&ifmgd->conn_mon_timer,
1478 round_jiffies_up(jiffies +
1479 IEEE80211_CONNECTION_IDLE_TIME));
1480 }
1481 }
1482
1483 /*
1484 * This is the canonical list of information elements we care about,
1485 * the filter code also gives us all changes to the Microsoft OUI
1486 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1487 *
1488 * We implement beacon filtering in software since that means we can
1489 * avoid processing the frame here and in cfg80211, and userspace
1490 * will not be able to tell whether the hardware supports it or not.
1491 *
1492 * XXX: This list needs to be dynamic -- userspace needs to be able to
1493 * add items it requires. It also needs to be able to tell us to
1494 * look out for other vendor IEs.
1495 */
1496 static const u64 care_about_ies =
1497 (1ULL << WLAN_EID_COUNTRY) |
1498 (1ULL << WLAN_EID_ERP_INFO) |
1499 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1500 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1501 (1ULL << WLAN_EID_HT_CAPABILITY) |
1502 (1ULL << WLAN_EID_HT_INFORMATION);
1503
1504 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1505 struct ieee80211_mgmt *mgmt,
1506 size_t len,
1507 struct ieee80211_rx_status *rx_status)
1508 {
1509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1510 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1511 size_t baselen;
1512 struct ieee802_11_elems elems;
1513 struct ieee80211_local *local = sdata->local;
1514 u32 changed = 0;
1515 bool erp_valid, directed_tim = false;
1516 u8 erp_value = 0;
1517 u32 ncrc;
1518 u8 *bssid;
1519
1520 ASSERT_MGD_MTX(ifmgd);
1521
1522 /* Process beacon from the current BSS */
1523 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1524 if (baselen > len)
1525 return;
1526
1527 if (rx_status->freq != local->hw.conf.channel->center_freq)
1528 return;
1529
1530 /*
1531 * We might have received a number of frames, among them a
1532 * disassoc frame and a beacon...
1533 */
1534 if (!ifmgd->associated)
1535 return;
1536
1537 bssid = ifmgd->associated->bssid;
1538
1539 /*
1540 * And in theory even frames from a different AP we were just
1541 * associated to a split-second ago!
1542 */
1543 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
1544 return;
1545
1546 /* Track average RSSI from the Beacon frames of the current AP */
1547 ifmgd->last_beacon_signal = rx_status->signal;
1548 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1549 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1550 ifmgd->ave_beacon_signal = rx_status->signal;
1551 ifmgd->last_cqm_event_signal = 0;
1552 } else {
1553 ifmgd->ave_beacon_signal =
1554 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1555 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1556 ifmgd->ave_beacon_signal) / 16;
1557 }
1558 if (bss_conf->cqm_rssi_thold &&
1559 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1560 int sig = ifmgd->ave_beacon_signal / 16;
1561 int last_event = ifmgd->last_cqm_event_signal;
1562 int thold = bss_conf->cqm_rssi_thold;
1563 int hyst = bss_conf->cqm_rssi_hyst;
1564 if (sig < thold &&
1565 (last_event == 0 || sig < last_event - hyst)) {
1566 ifmgd->last_cqm_event_signal = sig;
1567 ieee80211_cqm_rssi_notify(
1568 &sdata->vif,
1569 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1570 GFP_KERNEL);
1571 } else if (sig > thold &&
1572 (last_event == 0 || sig > last_event + hyst)) {
1573 ifmgd->last_cqm_event_signal = sig;
1574 ieee80211_cqm_rssi_notify(
1575 &sdata->vif,
1576 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1577 GFP_KERNEL);
1578 }
1579 }
1580
1581 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
1582 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1583 if (net_ratelimit()) {
1584 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1585 "to a received beacon\n", sdata->name);
1586 }
1587 #endif
1588 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
1589 mutex_lock(&local->iflist_mtx);
1590 ieee80211_recalc_ps(local, -1);
1591 mutex_unlock(&local->iflist_mtx);
1592 }
1593
1594 /*
1595 * Push the beacon loss detection into the future since
1596 * we are processing a beacon from the AP just now.
1597 */
1598 mod_beacon_timer(sdata);
1599
1600 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1601 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1602 len - baselen, &elems,
1603 care_about_ies, ncrc);
1604
1605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1606 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1607 ifmgd->aid);
1608
1609 if (ncrc != ifmgd->beacon_crc) {
1610 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1611 true);
1612
1613 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
1614 elems.wmm_param_len);
1615 }
1616
1617 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1618 if (directed_tim) {
1619 if (local->hw.conf.dynamic_ps_timeout > 0) {
1620 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1621 ieee80211_hw_config(local,
1622 IEEE80211_CONF_CHANGE_PS);
1623 ieee80211_send_nullfunc(local, sdata, 0);
1624 } else {
1625 local->pspolling = true;
1626
1627 /*
1628 * Here is assumed that the driver will be
1629 * able to send ps-poll frame and receive a
1630 * response even though power save mode is
1631 * enabled, but some drivers might require
1632 * to disable power save here. This needs
1633 * to be investigated.
1634 */
1635 ieee80211_send_pspoll(local, sdata);
1636 }
1637 }
1638 }
1639
1640 if (ncrc == ifmgd->beacon_crc)
1641 return;
1642 ifmgd->beacon_crc = ncrc;
1643
1644 if (elems.erp_info && elems.erp_info_len >= 1) {
1645 erp_valid = true;
1646 erp_value = elems.erp_info[0];
1647 } else {
1648 erp_valid = false;
1649 }
1650 changed |= ieee80211_handle_bss_capability(sdata,
1651 le16_to_cpu(mgmt->u.beacon.capab_info),
1652 erp_valid, erp_value);
1653
1654
1655 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1656 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
1657 struct sta_info *sta;
1658 struct ieee80211_supported_band *sband;
1659 u16 ap_ht_cap_flags;
1660
1661 rcu_read_lock();
1662
1663 sta = sta_info_get(sdata, bssid);
1664 if (WARN_ON(!sta)) {
1665 rcu_read_unlock();
1666 return;
1667 }
1668
1669 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1670
1671 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1672 elems.ht_cap_elem, &sta->sta.ht_cap);
1673
1674 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1675
1676 rcu_read_unlock();
1677
1678 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1679 bssid, ap_ht_cap_flags);
1680 }
1681
1682 /* Note: country IE parsing is done for us by cfg80211 */
1683 if (elems.country_elem) {
1684 /* TODO: IBSS also needs this */
1685 if (elems.pwr_constr_elem)
1686 ieee80211_handle_pwr_constr(sdata,
1687 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1688 elems.pwr_constr_elem,
1689 elems.pwr_constr_elem_len);
1690 }
1691
1692 ieee80211_bss_info_change_notify(sdata, changed);
1693 }
1694
1695 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1696 struct sk_buff *skb)
1697 {
1698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1699 struct ieee80211_rx_status *rx_status;
1700 struct ieee80211_mgmt *mgmt;
1701 enum rx_mgmt_action rma = RX_MGMT_NONE;
1702 u16 fc;
1703
1704 rx_status = (struct ieee80211_rx_status *) skb->cb;
1705 mgmt = (struct ieee80211_mgmt *) skb->data;
1706 fc = le16_to_cpu(mgmt->frame_control);
1707
1708 mutex_lock(&ifmgd->mtx);
1709
1710 if (ifmgd->associated &&
1711 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
1712 switch (fc & IEEE80211_FCTL_STYPE) {
1713 case IEEE80211_STYPE_BEACON:
1714 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1715 rx_status);
1716 break;
1717 case IEEE80211_STYPE_PROBE_RESP:
1718 ieee80211_rx_mgmt_probe_resp(sdata, skb);
1719 break;
1720 case IEEE80211_STYPE_DEAUTH:
1721 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1722 break;
1723 case IEEE80211_STYPE_DISASSOC:
1724 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1725 break;
1726 case IEEE80211_STYPE_ACTION:
1727 switch (mgmt->u.action.category) {
1728 case WLAN_CATEGORY_SPECTRUM_MGMT:
1729 ieee80211_sta_process_chanswitch(sdata,
1730 &mgmt->u.action.u.chan_switch.sw_elem,
1731 (void *)ifmgd->associated->priv,
1732 rx_status->mactime);
1733 break;
1734 }
1735 }
1736 mutex_unlock(&ifmgd->mtx);
1737
1738 switch (rma) {
1739 case RX_MGMT_NONE:
1740 /* no action */
1741 break;
1742 case RX_MGMT_CFG80211_DEAUTH:
1743 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1744 break;
1745 case RX_MGMT_CFG80211_DISASSOC:
1746 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
1747 break;
1748 default:
1749 WARN(1, "unexpected: %d", rma);
1750 }
1751 return;
1752 }
1753
1754 mutex_unlock(&ifmgd->mtx);
1755
1756 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
1757 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1758 struct ieee80211_local *local = sdata->local;
1759 struct ieee80211_work *wk;
1760
1761 mutex_lock(&local->mtx);
1762 list_for_each_entry(wk, &local->work_list, list) {
1763 if (wk->sdata != sdata)
1764 continue;
1765
1766 if (wk->type != IEEE80211_WORK_ASSOC &&
1767 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
1768 continue;
1769
1770 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1771 continue;
1772 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1773 continue;
1774
1775 /*
1776 * Printing the message only here means we can't
1777 * spuriously print it, but it also means that it
1778 * won't be printed when the frame comes in before
1779 * we even tried to associate or in similar cases.
1780 *
1781 * Ultimately, I suspect cfg80211 should print the
1782 * messages instead.
1783 */
1784 printk(KERN_DEBUG
1785 "%s: deauthenticated from %pM (Reason: %u)\n",
1786 sdata->name, mgmt->bssid,
1787 le16_to_cpu(mgmt->u.deauth.reason_code));
1788
1789 list_del_rcu(&wk->list);
1790 free_work(wk);
1791 break;
1792 }
1793 mutex_unlock(&local->mtx);
1794
1795 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
1796 }
1797 }
1798
1799 static void ieee80211_sta_timer(unsigned long data)
1800 {
1801 struct ieee80211_sub_if_data *sdata =
1802 (struct ieee80211_sub_if_data *) data;
1803 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1804 struct ieee80211_local *local = sdata->local;
1805
1806 if (local->quiescing) {
1807 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1808 return;
1809 }
1810
1811 ieee80211_queue_work(&local->hw, &sdata->work);
1812 }
1813
1814 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
1815 {
1816 struct ieee80211_local *local = sdata->local;
1817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1818
1819 /* then process the rest of the work */
1820 mutex_lock(&ifmgd->mtx);
1821
1822 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1823 IEEE80211_STA_CONNECTION_POLL) &&
1824 ifmgd->associated) {
1825 u8 bssid[ETH_ALEN];
1826
1827 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1828 if (time_is_after_jiffies(ifmgd->probe_timeout))
1829 run_again(ifmgd, ifmgd->probe_timeout);
1830
1831 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1832 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1833 printk(KERN_DEBUG "No probe response from AP %pM"
1834 " after %dms, try %d\n", bssid,
1835 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1836 ifmgd->probe_send_count);
1837 #endif
1838 ieee80211_mgd_probe_ap_send(sdata);
1839 } else {
1840 /*
1841 * We actually lost the connection ... or did we?
1842 * Let's make sure!
1843 */
1844 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1845 IEEE80211_STA_BEACON_POLL);
1846 printk(KERN_DEBUG "No probe response from AP %pM"
1847 " after %dms, disconnecting.\n",
1848 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
1849 ieee80211_set_disassoc(sdata, true);
1850 mutex_unlock(&ifmgd->mtx);
1851 mutex_lock(&local->mtx);
1852 ieee80211_recalc_idle(local);
1853 mutex_unlock(&local->mtx);
1854 /*
1855 * must be outside lock due to cfg80211,
1856 * but that's not a problem.
1857 */
1858 ieee80211_send_deauth_disassoc(sdata, bssid,
1859 IEEE80211_STYPE_DEAUTH,
1860 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1861 NULL, true);
1862 mutex_lock(&ifmgd->mtx);
1863 }
1864 }
1865
1866 mutex_unlock(&ifmgd->mtx);
1867 }
1868
1869 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1870 {
1871 struct ieee80211_sub_if_data *sdata =
1872 (struct ieee80211_sub_if_data *) data;
1873 struct ieee80211_local *local = sdata->local;
1874
1875 if (local->quiescing)
1876 return;
1877
1878 ieee80211_queue_work(&sdata->local->hw,
1879 &sdata->u.mgd.beacon_connection_loss_work);
1880 }
1881
1882 static void ieee80211_sta_conn_mon_timer(unsigned long data)
1883 {
1884 struct ieee80211_sub_if_data *sdata =
1885 (struct ieee80211_sub_if_data *) data;
1886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1887 struct ieee80211_local *local = sdata->local;
1888
1889 if (local->quiescing)
1890 return;
1891
1892 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
1893 }
1894
1895 static void ieee80211_sta_monitor_work(struct work_struct *work)
1896 {
1897 struct ieee80211_sub_if_data *sdata =
1898 container_of(work, struct ieee80211_sub_if_data,
1899 u.mgd.monitor_work);
1900
1901 ieee80211_mgd_probe_ap(sdata, false);
1902 }
1903
1904 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1905 {
1906 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1907 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1908 IEEE80211_STA_CONNECTION_POLL);
1909
1910 /* let's probe the connection once */
1911 ieee80211_queue_work(&sdata->local->hw,
1912 &sdata->u.mgd.monitor_work);
1913 /* and do all the other regular work too */
1914 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1915 }
1916 }
1917
1918 #ifdef CONFIG_PM
1919 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1920 {
1921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1922
1923 /*
1924 * we need to use atomic bitops for the running bits
1925 * only because both timers might fire at the same
1926 * time -- the code here is properly synchronised.
1927 */
1928
1929 cancel_work_sync(&ifmgd->request_smps_work);
1930
1931 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
1932 if (del_timer_sync(&ifmgd->timer))
1933 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1934
1935 cancel_work_sync(&ifmgd->chswitch_work);
1936 if (del_timer_sync(&ifmgd->chswitch_timer))
1937 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1938
1939 cancel_work_sync(&ifmgd->monitor_work);
1940 /* these will just be re-established on connection */
1941 del_timer_sync(&ifmgd->conn_mon_timer);
1942 del_timer_sync(&ifmgd->bcn_mon_timer);
1943 }
1944
1945 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1946 {
1947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1948
1949 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1950 add_timer(&ifmgd->timer);
1951 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1952 add_timer(&ifmgd->chswitch_timer);
1953 }
1954 #endif
1955
1956 /* interface setup */
1957 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1958 {
1959 struct ieee80211_if_managed *ifmgd;
1960
1961 ifmgd = &sdata->u.mgd;
1962 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
1963 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1964 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1965 ieee80211_beacon_connection_loss_work);
1966 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
1967 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
1968 (unsigned long) sdata);
1969 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1970 (unsigned long) sdata);
1971 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1972 (unsigned long) sdata);
1973 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
1974 (unsigned long) sdata);
1975
1976 ifmgd->flags = 0;
1977
1978 mutex_init(&ifmgd->mtx);
1979
1980 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1981 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1982 else
1983 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1984 }
1985
1986 /* scan finished notification */
1987 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1988 {
1989 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
1990
1991 /* Restart STA timers */
1992 rcu_read_lock();
1993 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1994 ieee80211_restart_sta_timer(sdata);
1995 rcu_read_unlock();
1996 }
1997
1998 int ieee80211_max_network_latency(struct notifier_block *nb,
1999 unsigned long data, void *dummy)
2000 {
2001 s32 latency_usec = (s32) data;
2002 struct ieee80211_local *local =
2003 container_of(nb, struct ieee80211_local,
2004 network_latency_notifier);
2005
2006 mutex_lock(&local->iflist_mtx);
2007 ieee80211_recalc_ps(local, latency_usec);
2008 mutex_unlock(&local->iflist_mtx);
2009
2010 return 0;
2011 }
2012
2013 /* config hooks */
2014 static enum work_done_result
2015 ieee80211_probe_auth_done(struct ieee80211_work *wk,
2016 struct sk_buff *skb)
2017 {
2018 if (!skb) {
2019 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2020 return WORK_DONE_DESTROY;
2021 }
2022
2023 if (wk->type == IEEE80211_WORK_AUTH) {
2024 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2025 return WORK_DONE_DESTROY;
2026 }
2027
2028 mutex_lock(&wk->sdata->u.mgd.mtx);
2029 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2030 mutex_unlock(&wk->sdata->u.mgd.mtx);
2031
2032 wk->type = IEEE80211_WORK_AUTH;
2033 wk->probe_auth.tries = 0;
2034 return WORK_DONE_REQUEUE;
2035 }
2036
2037 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2038 struct cfg80211_auth_request *req)
2039 {
2040 const u8 *ssid;
2041 struct ieee80211_work *wk;
2042 u16 auth_alg;
2043
2044 if (req->local_state_change)
2045 return 0; /* no need to update mac80211 state */
2046
2047 switch (req->auth_type) {
2048 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2049 auth_alg = WLAN_AUTH_OPEN;
2050 break;
2051 case NL80211_AUTHTYPE_SHARED_KEY:
2052 if (IS_ERR(sdata->local->wep_tx_tfm))
2053 return -EOPNOTSUPP;
2054 auth_alg = WLAN_AUTH_SHARED_KEY;
2055 break;
2056 case NL80211_AUTHTYPE_FT:
2057 auth_alg = WLAN_AUTH_FT;
2058 break;
2059 case NL80211_AUTHTYPE_NETWORK_EAP:
2060 auth_alg = WLAN_AUTH_LEAP;
2061 break;
2062 default:
2063 return -EOPNOTSUPP;
2064 }
2065
2066 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2067 if (!wk)
2068 return -ENOMEM;
2069
2070 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2071
2072 if (req->ie && req->ie_len) {
2073 memcpy(wk->ie, req->ie, req->ie_len);
2074 wk->ie_len = req->ie_len;
2075 }
2076
2077 if (req->key && req->key_len) {
2078 wk->probe_auth.key_len = req->key_len;
2079 wk->probe_auth.key_idx = req->key_idx;
2080 memcpy(wk->probe_auth.key, req->key, req->key_len);
2081 }
2082
2083 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2084 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2085 wk->probe_auth.ssid_len = ssid[1];
2086
2087 wk->probe_auth.algorithm = auth_alg;
2088 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
2089
2090 /* if we already have a probe, don't probe again */
2091 if (req->bss->proberesp_ies)
2092 wk->type = IEEE80211_WORK_AUTH;
2093 else
2094 wk->type = IEEE80211_WORK_DIRECT_PROBE;
2095 wk->chan = req->bss->channel;
2096 wk->sdata = sdata;
2097 wk->done = ieee80211_probe_auth_done;
2098
2099 ieee80211_add_work(wk);
2100 return 0;
2101 }
2102
2103 static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2104 struct sk_buff *skb)
2105 {
2106 struct ieee80211_mgmt *mgmt;
2107 struct ieee80211_rx_status *rx_status;
2108 struct ieee802_11_elems elems;
2109 u16 status;
2110
2111 if (!skb) {
2112 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2113 return WORK_DONE_DESTROY;
2114 }
2115
2116 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2117 mutex_lock(&wk->sdata->u.mgd.mtx);
2118 rx_status = (void *) skb->cb;
2119 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2120 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2121 &elems, true);
2122 mutex_unlock(&wk->sdata->u.mgd.mtx);
2123
2124 wk->type = IEEE80211_WORK_ASSOC;
2125 /* not really done yet */
2126 return WORK_DONE_REQUEUE;
2127 }
2128
2129 mgmt = (void *)skb->data;
2130 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2131
2132 if (status == WLAN_STATUS_SUCCESS) {
2133 mutex_lock(&wk->sdata->u.mgd.mtx);
2134 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2135 mutex_unlock(&wk->sdata->u.mgd.mtx);
2136 /* oops -- internal error -- send timeout for now */
2137 cfg80211_send_assoc_timeout(wk->sdata->dev,
2138 wk->filter_ta);
2139 return WORK_DONE_DESTROY;
2140 }
2141
2142 mutex_unlock(&wk->sdata->u.mgd.mtx);
2143 }
2144
2145 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2146 return WORK_DONE_DESTROY;
2147 }
2148
2149 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2150 struct cfg80211_assoc_request *req)
2151 {
2152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153 struct ieee80211_bss *bss = (void *)req->bss->priv;
2154 struct ieee80211_work *wk;
2155 const u8 *ssid;
2156 int i;
2157
2158 mutex_lock(&ifmgd->mtx);
2159 if (ifmgd->associated) {
2160 if (!req->prev_bssid ||
2161 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2162 ETH_ALEN)) {
2163 /*
2164 * We are already associated and the request was not a
2165 * reassociation request from the current BSS, so
2166 * reject it.
2167 */
2168 mutex_unlock(&ifmgd->mtx);
2169 return -EALREADY;
2170 }
2171
2172 /* Trying to reassociate - clear previous association state */
2173 ieee80211_set_disassoc(sdata, true);
2174 }
2175 mutex_unlock(&ifmgd->mtx);
2176
2177 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2178 if (!wk)
2179 return -ENOMEM;
2180
2181 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2182 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2183
2184 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2185 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2186 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2187 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2188 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2189
2190
2191 if (req->ie && req->ie_len) {
2192 memcpy(wk->ie, req->ie, req->ie_len);
2193 wk->ie_len = req->ie_len;
2194 } else
2195 wk->ie_len = 0;
2196
2197 wk->assoc.bss = req->bss;
2198
2199 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
2200
2201 /* new association always uses requested smps mode */
2202 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2203 if (ifmgd->powersave)
2204 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2205 else
2206 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2207 } else
2208 ifmgd->ap_smps = ifmgd->req_smps;
2209
2210 wk->assoc.smps = ifmgd->ap_smps;
2211 /*
2212 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2213 * We still associate in non-HT mode (11a/b/g) if any one of these
2214 * ciphers is configured as pairwise.
2215 * We can set this to true for non-11n hardware, that'll be checked
2216 * separately along with the peer capabilities.
2217 */
2218 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
2219 wk->assoc.capability = req->bss->capability;
2220 wk->assoc.wmm_used = bss->wmm_used;
2221 wk->assoc.supp_rates = bss->supp_rates;
2222 wk->assoc.supp_rates_len = bss->supp_rates_len;
2223 wk->assoc.ht_information_ie =
2224 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
2225
2226 if (bss->wmm_used && bss->uapsd_supported &&
2227 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2228 wk->assoc.uapsd_used = true;
2229 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2230 } else {
2231 wk->assoc.uapsd_used = false;
2232 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2233 }
2234
2235 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2236 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2237 wk->assoc.ssid_len = ssid[1];
2238
2239 if (req->prev_bssid)
2240 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
2241
2242 wk->chan = req->bss->channel;
2243 wk->sdata = sdata;
2244 wk->done = ieee80211_assoc_done;
2245 if (!bss->dtim_period &&
2246 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2247 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2248 else
2249 wk->type = IEEE80211_WORK_ASSOC;
2250
2251 if (req->use_mfp) {
2252 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2253 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2254 } else {
2255 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2256 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2257 }
2258
2259 if (req->crypto.control_port)
2260 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2261 else
2262 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2263
2264 ieee80211_add_work(wk);
2265 return 0;
2266 }
2267
2268 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2269 struct cfg80211_deauth_request *req,
2270 void *cookie)
2271 {
2272 struct ieee80211_local *local = sdata->local;
2273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2274 struct ieee80211_work *wk;
2275 u8 bssid[ETH_ALEN];
2276 bool assoc_bss = false;
2277
2278 mutex_lock(&ifmgd->mtx);
2279
2280 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2281 if (ifmgd->associated == req->bss) {
2282 ieee80211_set_disassoc(sdata, false);
2283 mutex_unlock(&ifmgd->mtx);
2284 assoc_bss = true;
2285 } else {
2286 bool not_auth_yet = false;
2287
2288 mutex_unlock(&ifmgd->mtx);
2289
2290 mutex_lock(&local->mtx);
2291 list_for_each_entry(wk, &local->work_list, list) {
2292 if (wk->sdata != sdata)
2293 continue;
2294
2295 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2296 wk->type != IEEE80211_WORK_AUTH &&
2297 wk->type != IEEE80211_WORK_ASSOC &&
2298 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
2299 continue;
2300
2301 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2302 continue;
2303
2304 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2305 list_del_rcu(&wk->list);
2306 free_work(wk);
2307 break;
2308 }
2309 mutex_unlock(&local->mtx);
2310
2311 /*
2312 * If somebody requests authentication and we haven't
2313 * sent out an auth frame yet there's no need to send
2314 * out a deauth frame either. If the state was PROBE,
2315 * then this is the case. If it's AUTH we have sent a
2316 * frame, and if it's IDLE we have completed the auth
2317 * process already.
2318 */
2319 if (not_auth_yet) {
2320 __cfg80211_auth_canceled(sdata->dev, bssid);
2321 return 0;
2322 }
2323 }
2324
2325 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2326 sdata->name, bssid, req->reason_code);
2327
2328 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2329 req->reason_code, cookie,
2330 !req->local_state_change);
2331 if (assoc_bss)
2332 sta_info_destroy_addr(sdata, bssid);
2333
2334 mutex_lock(&sdata->local->mtx);
2335 ieee80211_recalc_idle(sdata->local);
2336 mutex_unlock(&sdata->local->mtx);
2337
2338 return 0;
2339 }
2340
2341 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2342 struct cfg80211_disassoc_request *req,
2343 void *cookie)
2344 {
2345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2346 u8 bssid[ETH_ALEN];
2347
2348 mutex_lock(&ifmgd->mtx);
2349
2350 /*
2351 * cfg80211 should catch this ... but it's racy since
2352 * we can receive a disassoc frame, process it, hand it
2353 * to cfg80211 while that's in a locked section already
2354 * trying to tell us that the user wants to disconnect.
2355 */
2356 if (ifmgd->associated != req->bss) {
2357 mutex_unlock(&ifmgd->mtx);
2358 return -ENOLINK;
2359 }
2360
2361 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2362 sdata->name, req->bss->bssid, req->reason_code);
2363
2364 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2365 ieee80211_set_disassoc(sdata, false);
2366
2367 mutex_unlock(&ifmgd->mtx);
2368
2369 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2370 IEEE80211_STYPE_DISASSOC, req->reason_code,
2371 cookie, !req->local_state_change);
2372 sta_info_destroy_addr(sdata, bssid);
2373
2374 mutex_lock(&sdata->local->mtx);
2375 ieee80211_recalc_idle(sdata->local);
2376 mutex_unlock(&sdata->local->mtx);
2377
2378 return 0;
2379 }
2380
2381 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2382 enum nl80211_cqm_rssi_threshold_event rssi_event,
2383 gfp_t gfp)
2384 {
2385 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2386
2387 trace_api_cqm_rssi_notify(sdata, rssi_event);
2388
2389 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2390 }
2391 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree