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lib: Improve EWMA efficiency by using bitshifts
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 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
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
72a8a3ed 31#define IEEE80211_MAX_NULLFUNC_TRIES 2
a43abf29 32#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB		 33
34/*
7ccc8bd7
FF		 35 * Beacon loss timeout is calculated as N frames times the
36 * advertised beacon interval. This may need to be somewhat
37 * higher than what hardware might detect to account for
38 * delays in the host processing frames. But since we also
39 * probe on beacon miss before declaring the connection lost
40 * default to what we want.
b291ba11 41 */
7ccc8bd7
FF		 42#define IEEE80211_BEACON_LOSS_COUNT 7
43
b291ba11
JB		 44/*
45 * Time the connection can be idle before we probe
46 * it to see if we can still talk to the AP.
47 */
d1c5091f 48#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 49/*
50 * Time we wait for a probe response after sending
51 * a probe request because of beacon loss or for
52 * checking the connection still works.
53 */
d1c5091f 54#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 55
17e4ec14
JM		 56/*
57 * Weight given to the latest Beacon frame when calculating average signal
58 * strength for Beacon frames received in the current BSS. This must be
59 * between 1 and 15.
60 */
61#define IEEE80211_SIGNAL_AVE_WEIGHT 3
62
391a200a
JM		 63/*
64 * How many Beacon frames need to have been used in average signal strength
65 * before starting to indicate signal change events.
66 */
67#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
68
5bb644a0
JB		 69#define TMR_RUNNING_TIMER 0
70#define TMR_RUNNING_CHANSW 1
71
77fdaa12
JB		 72/*
73 * All cfg80211 functions have to be called outside a locked
74 * section so that they can acquire a lock themselves... This
75 * is much simpler than queuing up things in cfg80211, but we
76 * do need some indirection for that here.
77 */
78enum rx_mgmt_action {
79 /* no action required */
80 RX_MGMT_NONE,
81
82 /* caller must call cfg80211_send_rx_auth() */
83 RX_MGMT_CFG80211_AUTH,
84
85 /* caller must call cfg80211_send_rx_assoc() */
86 RX_MGMT_CFG80211_ASSOC,
87
88 /* caller must call cfg80211_send_deauth() */
89 RX_MGMT_CFG80211_DEAUTH,
90
91 /* caller must call cfg80211_send_disassoc() */
92 RX_MGMT_CFG80211_DISASSOC,
93
5d1ec85f
JB		 94 /* caller must tell cfg80211 about internal error */
95 RX_MGMT_CFG80211_ASSOC_ERROR,
77fdaa12
JB		 96};
97
5484e237 98/* utils */
77fdaa12
JB		 99static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
100{
46a5ebaf 101 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 102}
103
ca386f31
JB		 104/*
105 * We can have multiple work items (and connection probing)
106 * scheduling this timer, but we need to take care to only
107 * reschedule it when it should fire _earlier_ than it was
108 * asked for before, or if it's not pending right now. This
109 * function ensures that. Note that it then is required to
110 * run this function for all timeouts after the first one
111 * has happened -- the work that runs from this timer will
112 * do that.
113 */
114static void run_again(struct ieee80211_if_managed *ifmgd,
115 unsigned long timeout)
116{
117 ASSERT_MGD_MTX(ifmgd);
118
119 if (!timer_pending(&ifmgd->timer) ||
120 time_before(timeout, ifmgd->timer.expires))
121 mod_timer(&ifmgd->timer, timeout);
122}
123
d3a910a8 124void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 125{
126 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
127 return;
128
129 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 130 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 131}
132
be099e82
LR		 133void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
134{
0c699c3a
LR		 135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 142
143 ifmgd->probe_send_count = 0;
be099e82
LR		 144}
145
5484e237 146static int ecw2cw(int ecw)
60f8b39c 147{
5484e237 148 return (1 << ecw) - 1;
60f8b39c
JB		 149}
150
d5522e03
JB		 151/*
152 * ieee80211_enable_ht should be called only after the operating band
153 * has been determined as ht configuration depends on the hw's
154 * HT abilities for a specific band.
155 */
156static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
157 struct ieee80211_ht_info *hti,
77fdaa12 158 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 159{
160 struct ieee80211_local *local = sdata->local;
161 struct ieee80211_supported_band *sband;
d5522e03
JB		 162 struct sta_info *sta;
163 u32 changed = 0;
9ed6bcce 164 u16 ht_opmode;
0aaffa9b
JB		 165 bool enable_ht = true;
166 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 167 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
168
169 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
170
0aaffa9b
JB		 171 prev_chantype = sdata->vif.bss_conf.channel_type;
172
d5522e03
JB		 173 /* HT is not supported */
174 if (!sband->ht_cap.ht_supported)
175 enable_ht = false;
176
177 /* check that channel matches the right operating channel */
178 if (local->hw.conf.channel->center_freq !=
179 ieee80211_channel_to_frequency(hti->control_chan))
180 enable_ht = false;
181
182 if (enable_ht) {
183 channel_type = NL80211_CHAN_HT20;
184
185 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
186 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
187 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
188 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
189 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 190 if (!(local->hw.conf.channel->flags &
191 IEEE80211_CHAN_NO_HT40PLUS))
192 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 193 break;
194 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 195 if (!(local->hw.conf.channel->flags &
196 IEEE80211_CHAN_NO_HT40MINUS))
197 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 198 break;
199 }
200 }
201 }
202
fe6f212c
RC		 203 if (local->tmp_channel)
204 local->tmp_channel_type = channel_type;
d5522e03 205
0aaffa9b
JB		 206 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
207 /* can only fail due to HT40+/- mismatch */
208 channel_type = NL80211_CHAN_HT20;
209 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
210 }
d5522e03 211
0aaffa9b
JB		 212 /* channel_type change automatically detected */
213 ieee80211_hw_config(local, 0);
d5522e03 214
0aaffa9b 215 if (prev_chantype != channel_type) {
d5522e03 216 rcu_read_lock();
abe60632 217 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 218 if (sta)
219 rate_control_rate_update(local, sband, sta,
4fa00437 220 IEEE80211_RC_HT_CHANGED,
0aaffa9b 221 channel_type);
d5522e03 222 rcu_read_unlock();
0aaffa9b 223 }
d5522e03 224
9ed6bcce 225 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 226
227 /* if bss configuration changed store the new one */
0aaffa9b
JB		 228 if (sdata->ht_opmode_valid != enable_ht ||
229 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
230 prev_chantype != channel_type) {
d5522e03 231 changed |= BSS_CHANGED_HT;
9ed6bcce 232 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 233 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 234 }
235
236 return changed;
237}
238
9c6bd790
JB		 239/* frame sending functions */
240
ef422bc0 241static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 242 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 243 void *cookie, bool send_frame)
9ac19a90
JB		 244{
245 struct ieee80211_local *local = sdata->local;
46900298 246 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 247 struct sk_buff *skb;
248 struct ieee80211_mgmt *mgmt;
9aed3cc1 249
65fc73ac 250 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 251 if (!skb) {
ef422bc0 252 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 253 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 254 return;
255 }
256 skb_reserve(skb, local->hw.extra_tx_headroom);
257
258 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
259 memset(mgmt, 0, 24);
77fdaa12 260 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 261 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 262 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 263 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 264 skb_put(skb, 2);
ef422bc0 265 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 266 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
267
53b46b84 268 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 269 if (cookie)
270 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
271 else
272 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 273 else
ce470613
HS		 274 if (cookie)
275 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
276 else
277 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 278 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
279 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 280
281 if (send_frame)
282 ieee80211_tx_skb(sdata, skb);
283 else
284 kfree_skb(skb);
9ac19a90
JB		 285}
286
572e0012
KV		 287void ieee80211_send_pspoll(struct ieee80211_local *local,
288 struct ieee80211_sub_if_data *sdata)
289{
572e0012
KV		 290 struct ieee80211_pspoll *pspoll;
291 struct sk_buff *skb;
572e0012 292
d8cd189e
KV		 293 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
294 if (!skb)
572e0012 295 return;
572e0012 296
d8cd189e
KV		 297 pspoll = (struct ieee80211_pspoll *) skb->data;
298 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 299
62ae67be
JB		 300 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
301 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 302}
303
965bedad
JB		 304void ieee80211_send_nullfunc(struct ieee80211_local *local,
305 struct ieee80211_sub_if_data *sdata,
306 int powersave)
307{
308 struct sk_buff *skb;
d8cd189e 309 struct ieee80211_hdr_3addr *nullfunc;
965bedad 310
d8cd189e
KV		 311 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
312 if (!skb)
965bedad 313 return;
965bedad 314
d8cd189e 315 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 316 if (powersave)
d8cd189e 317 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 318
62ae67be
JB		 319 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
320 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 321}
322
d524215f
FF		 323static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
324 struct ieee80211_sub_if_data *sdata)
325{
326 struct sk_buff *skb;
327 struct ieee80211_hdr *nullfunc;
328 __le16 fc;
329
330 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
331 return;
332
333 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
334 if (!skb) {
335 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
336 "nullfunc frame\n", sdata->name);
337 return;
338 }
339 skb_reserve(skb, local->hw.extra_tx_headroom);
340
341 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
342 memset(nullfunc, 0, 30);
343 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
344 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
345 nullfunc->frame_control = fc;
346 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
347 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
348 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
349 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
350
351 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
352 ieee80211_tx_skb(sdata, skb);
353}
354
cc32abd4
JB		 355/* spectrum management related things */
356static void ieee80211_chswitch_work(struct work_struct *work)
357{
358 struct ieee80211_sub_if_data *sdata =
359 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
361
9607e6b6 362 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 363 return;
364
77fdaa12
JB		 365 mutex_lock(&ifmgd->mtx);
366 if (!ifmgd->associated)
367 goto out;
cc32abd4
JB		 368
369 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 370 if (!sdata->local->ops->channel_switch) {
371 /* call "hw_config" only if doing sw channel switch */
372 ieee80211_hw_config(sdata->local,
373 IEEE80211_CONF_CHANGE_CHANNEL);
374 }
77fdaa12 375
cc32abd4 376 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 377 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 378
cc32abd4
JB		 379 ieee80211_wake_queues_by_reason(&sdata->local->hw,
380 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 381 out:
382 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
383 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 384}
385
5ce6e438
JB		 386void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
387{
388 struct ieee80211_sub_if_data *sdata;
389 struct ieee80211_if_managed *ifmgd;
390
391 sdata = vif_to_sdata(vif);
392 ifmgd = &sdata->u.mgd;
393
394 trace_api_chswitch_done(sdata, success);
395 if (!success) {
396 /*
397 * If the channel switch was not successful, stay
398 * around on the old channel. We currently lack
399 * good handling of this situation, possibly we
400 * should just drop the association.
401 */
402 sdata->local->csa_channel = sdata->local->oper_channel;
403 }
404
405 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
406}
407EXPORT_SYMBOL(ieee80211_chswitch_done);
408
cc32abd4
JB		 409static void ieee80211_chswitch_timer(unsigned long data)
410{
411 struct ieee80211_sub_if_data *sdata =
412 (struct ieee80211_sub_if_data *) data;
413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
414
5bb644a0
JB		 415 if (sdata->local->quiescing) {
416 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
417 return;
418 }
419
42935eca 420 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 421}
422
423void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
424 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 425 struct ieee80211_bss *bss,
426 u64 timestamp)
cc32abd4 427{
0c1ad2ca
JB		 428 struct cfg80211_bss *cbss =
429 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 430 struct ieee80211_channel *new_ch;
431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
432 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
433
77fdaa12
JB		 434 ASSERT_MGD_MTX(ifmgd);
435
436 if (!ifmgd->associated)
cc32abd4
JB		 437 return;
438
fbe9c429 439 if (sdata->local->scanning)
cc32abd4
JB		 440 return;
441
442 /* Disregard subsequent beacons if we are already running a timer
443 processing a CSA */
444
445 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
446 return;
447
448 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
449 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
450 return;
451
452 sdata->local->csa_channel = new_ch;
453
5ce6e438
JB		 454 if (sdata->local->ops->channel_switch) {
455 /* use driver's channel switch callback */
456 struct ieee80211_channel_switch ch_switch;
457 memset(&ch_switch, 0, sizeof(ch_switch));
458 ch_switch.timestamp = timestamp;
459 if (sw_elem->mode) {
460 ch_switch.block_tx = true;
461 ieee80211_stop_queues_by_reason(&sdata->local->hw,
462 IEEE80211_QUEUE_STOP_REASON_CSA);
463 }
464 ch_switch.channel = new_ch;
465 ch_switch.count = sw_elem->count;
466 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
467 drv_channel_switch(sdata->local, &ch_switch);
468 return;
469 }
470
471 /* channel switch handled in software */
cc32abd4 472 if (sw_elem->count <= 1) {
42935eca 473 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 474 } else {
9feaddc7
WYG		 475 if (sw_elem->mode)
476 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 477 IEEE80211_QUEUE_STOP_REASON_CSA);
478 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
479 mod_timer(&ifmgd->chswitch_timer,
480 jiffies +
481 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 482 cbss->beacon_interval));
cc32abd4
JB		 483 }
484}
485
486static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
487 u16 capab_info, u8 *pwr_constr_elem,
488 u8 pwr_constr_elem_len)
489{
490 struct ieee80211_conf *conf = &sdata->local->hw.conf;
491
492 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
493 return;
494
495 /* Power constraint IE length should be 1 octet */
496 if (pwr_constr_elem_len != 1)
497 return;
498
499 if ((*pwr_constr_elem <= conf->channel->max_power) &&
500 (*pwr_constr_elem != sdata->local->power_constr_level)) {
501 sdata->local->power_constr_level = *pwr_constr_elem;
502 ieee80211_hw_config(sdata->local, 0);
503 }
504}
505
f90754c1
JO		 506void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
507{
508 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
509 struct ieee80211_local *local = sdata->local;
510 struct ieee80211_conf *conf = &local->hw.conf;
511
512 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
513 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
514 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
515
516 local->disable_dynamic_ps = false;
517 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
518}
519EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
520
521void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
522{
523 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
524 struct ieee80211_local *local = sdata->local;
525 struct ieee80211_conf *conf = &local->hw.conf;
526
527 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
528 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
529 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
530
531 local->disable_dynamic_ps = true;
532 conf->dynamic_ps_timeout = 0;
533 del_timer_sync(&local->dynamic_ps_timer);
534 ieee80211_queue_work(&local->hw,
535 &local->dynamic_ps_enable_work);
536}
537EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
538
965bedad
JB		 539/* powersave */
540static void ieee80211_enable_ps(struct ieee80211_local *local,
541 struct ieee80211_sub_if_data *sdata)
542{
543 struct ieee80211_conf *conf = &local->hw.conf;
544
d5edaedc
JB		 545 /*
546 * If we are scanning right now then the parameters will
547 * take effect when scan finishes.
548 */
fbe9c429 549 if (local->scanning)
d5edaedc
JB		 550 return;
551
965bedad
JB		 552 if (conf->dynamic_ps_timeout > 0 &&
553 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
554 mod_timer(&local->dynamic_ps_timer, jiffies +
555 msecs_to_jiffies(conf->dynamic_ps_timeout));
556 } else {
557 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
558 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 559
2a13052f
JO		 560 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
561 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
562 return;
563
564 conf->flags |= IEEE80211_CONF_PS;
565 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 566 }
567}
568
569static void ieee80211_change_ps(struct ieee80211_local *local)
570{
571 struct ieee80211_conf *conf = &local->hw.conf;
572
573 if (local->ps_sdata) {
965bedad
JB		 574 ieee80211_enable_ps(local, local->ps_sdata);
575 } else if (conf->flags & IEEE80211_CONF_PS) {
576 conf->flags &= ~IEEE80211_CONF_PS;
577 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
578 del_timer_sync(&local->dynamic_ps_timer);
579 cancel_work_sync(&local->dynamic_ps_enable_work);
580 }
581}
582
583/* need to hold RTNL or interface lock */
10f644a4 584void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 585{
586 struct ieee80211_sub_if_data *sdata, *found = NULL;
587 int count = 0;
195e294d 588 int timeout;
965bedad
JB		 589
590 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
591 local->ps_sdata = NULL;
592 return;
593 }
594
af6b6374
JB		 595 if (!list_empty(&local->work_list)) {
596 local->ps_sdata = NULL;
597 goto change;
598 }
599
965bedad 600 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 601 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 602 continue;
603 if (sdata->vif.type != NL80211_IFTYPE_STATION)
604 continue;
605 found = sdata;
606 count++;
607 }
608
43f78531 609 if (count == 1 && found->u.mgd.powersave &&
af6b6374 610 found->u.mgd.associated &&
56007a02 611 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 612 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
613 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 614 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 615 s32 beaconint_us;
616
617 if (latency < 0)
ed77134b 618 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 619
620 beaconint_us = ieee80211_tu_to_usec(
621 found->vif.bss_conf.beacon_int);
622
ff616381 623 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 624 if (timeout < 0) {
625 /*
ff616381
JO		 626 * Go to full PSM if the user configures a very low
627 * latency requirement.
195e294d
JO		 628 * The 2 second value is there for compatibility until
629 * the PM_QOS_NETWORK_LATENCY is configured with real
630 * values.
631 */
ff616381 632 if (latency > 1900000000 && latency != 2000000000)
195e294d 633 timeout = 0;
ff616381
JO		 634 else
635 timeout = 100;
195e294d 636 }
f90754c1
JO		 637 local->dynamic_ps_user_timeout = timeout;
638 if (!local->disable_dynamic_ps)
639 conf->dynamic_ps_timeout =
640 local->dynamic_ps_user_timeout;
195e294d 641
04fe2037 642 if (beaconint_us > latency) {
10f644a4 643 local->ps_sdata = NULL;
04fe2037 644 } else {
56007a02 645 struct ieee80211_bss *bss;
04fe2037 646 int maxslp = 1;
56007a02 647 u8 dtimper;
04fe2037 648
56007a02
JB		 649 bss = (void *)found->u.mgd.associated->priv;
650 dtimper = bss->dtim_period;
651
652 /* If the TIM IE is invalid, pretend the value is 1 */
653 if (!dtimper)
654 dtimper = 1;
655 else if (dtimper > 1)
04fe2037
JB		 656 maxslp = min_t(int, dtimper,
657 latency / beaconint_us);
658
9ccebe61 659 local->hw.conf.max_sleep_period = maxslp;
56007a02 660 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 661 local->ps_sdata = found;
04fe2037 662 }
10f644a4 663 } else {
965bedad 664 local->ps_sdata = NULL;
10f644a4 665 }
965bedad 666
af6b6374 667 change:
965bedad
JB		 668 ieee80211_change_ps(local);
669}
670
671void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
672{
673 struct ieee80211_local *local =
674 container_of(work, struct ieee80211_local,
675 dynamic_ps_disable_work);
676
677 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
678 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
679 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
680 }
681
682 ieee80211_wake_queues_by_reason(&local->hw,
683 IEEE80211_QUEUE_STOP_REASON_PS);
684}
685
686void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
687{
688 struct ieee80211_local *local =
689 container_of(work, struct ieee80211_local,
690 dynamic_ps_enable_work);
691 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 693
694 /* can only happen when PS was just disabled anyway */
695 if (!sdata)
696 return;
697
698 if (local->hw.conf.flags & IEEE80211_CONF_PS)
699 return;
700
375177bf
VN		 701 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
702 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 703 ieee80211_send_nullfunc(local, sdata, 1);
704
2a13052f
JO		 705 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
706 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 707 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
708 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
709 local->hw.conf.flags |= IEEE80211_CONF_PS;
710 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
711 }
965bedad
JB		 712}
713
714void ieee80211_dynamic_ps_timer(unsigned long data)
715{
716 struct ieee80211_local *local = (void *) data;
717
78f1a8b7 718 if (local->quiescing || local->suspended)
5bb644a0
JB		 719 return;
720
42935eca 721 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 722}
723
60f8b39c 724/* MLME */
f698d856 725static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 726 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 727 u8 *wmm_param, size_t wmm_param_len)
728{
f0706e82 729 struct ieee80211_tx_queue_params params;
4ced3f74 730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 731 size_t left;
732 int count;
ab13315a 733 u8 *pos, uapsd_queues = 0;
f0706e82 734
e1b3ec1a
SG		 735 if (!local->ops->conf_tx)
736 return;
737
af6b6374 738 if (local->hw.queues < 4)
3434fbd3
JB		 739 return;
740
741 if (!wmm_param)
742 return;
743
f0706e82
JB		 744 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
745 return;
ab13315a
KV		 746
747 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 748 uapsd_queues = local->uapsd_queues;
ab13315a 749
f0706e82 750 count = wmm_param[6] & 0x0f;
46900298 751 if (count == ifmgd->wmm_last_param_set)
f0706e82 752 return;
46900298 753 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 754
755 pos = wmm_param + 8;
756 left = wmm_param_len - 8;
757
758 memset(&params, 0, sizeof(params));
759
f0706e82
JB		 760 local->wmm_acm = 0;
761 for (; left >= 4; left -= 4, pos += 4) {
762 int aci = (pos[0] >> 5) & 0x03;
763 int acm = (pos[0] >> 4) & 0x01;
ab13315a 764 bool uapsd = false;
f0706e82
JB		 765 int queue;
766
767 switch (aci) {
0eeb59fe 768 case 1: /* AC_BK */
e100bb64 769 queue = 3;
988c0f72 770 if (acm)
0eeb59fe 771 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 772 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
773 uapsd = true;
f0706e82 774 break;
0eeb59fe 775 case 2: /* AC_VI */
e100bb64 776 queue = 1;
988c0f72 777 if (acm)
0eeb59fe 778 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 779 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
780 uapsd = true;
f0706e82 781 break;
0eeb59fe 782 case 3: /* AC_VO */
e100bb64 783 queue = 0;
988c0f72 784 if (acm)
0eeb59fe 785 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 786 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
787 uapsd = true;
f0706e82 788 break;
0eeb59fe 789 case 0: /* AC_BE */
f0706e82 790 default:
e100bb64 791 queue = 2;
988c0f72 792 if (acm)
0eeb59fe 793 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 794 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
795 uapsd = true;
f0706e82
JB		 796 break;
797 }
798
799 params.aifs = pos[0] & 0x0f;
800 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
801 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 802 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 803 params.uapsd = uapsd;
804
f4ea83dd 805#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 806 wiphy_debug(local->hw.wiphy,
807 "WMM queue=%d aci=%d acm=%d aifs=%d "
808 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
809 queue, aci, acm,
810 params.aifs, params.cw_min, params.cw_max,
811 params.txop, params.uapsd);
3330d7be 812#endif
e1b3ec1a 813 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 814 wiphy_debug(local->hw.wiphy,
815 "failed to set TX queue parameters for queue %d\n",
816 queue);
f0706e82 817 }
e1b3ec1a
SG		 818
819 /* enable WMM or activate new settings */
4ced3f74
JB		 820 sdata->vif.bss_conf.qos = true;
821 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 822}
823
7a5158ef
JB		 824static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
825 u16 capab, bool erp_valid, u8 erp)
5628221c 826{
bda3933a 827 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 828 u32 changed = 0;
7a5158ef
JB		 829 bool use_protection;
830 bool use_short_preamble;
831 bool use_short_slot;
832
833 if (erp_valid) {
834 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
835 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
836 } else {
837 use_protection = false;
838 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
839 }
840
841 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 842 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
843 use_short_slot = true;
5628221c 844
471b3efd 845 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 846 bss_conf->use_cts_prot = use_protection;
847 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 848 }
7e9ed188 849
d43c7b37 850 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 851 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 852 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 853 }
d9430a32 854
7a5158ef 855 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 856 bss_conf->use_short_slot = use_short_slot;
857 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 858 }
859
860 return changed;
861}
862
f698d856 863static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 864 struct cfg80211_bss *cbss,
ae5eb026 865 u32 bss_info_changed)
f0706e82 866{
0c1ad2ca 867 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 868 struct ieee80211_local *local = sdata->local;
68542962 869 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 870
ae5eb026 871 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 872 /* set timing information */
68542962
JO		 873 bss_conf->beacon_int = cbss->beacon_interval;
874 bss_conf->timestamp = cbss->tsf;
5628221c 875
77fdaa12
JB		 876 bss_info_changed |= BSS_CHANGED_BEACON_INT;
877 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 878 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 879
7ccc8bd7
FF		 880 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
881 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
882
0c1ad2ca
JB		 883 sdata->u.mgd.associated = cbss;
884 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 885
17e4ec14
JM		 886 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
887
b291ba11
JB		 888 /* just to be sure */
889 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
890 IEEE80211_STA_BEACON_POLL);
891
9ac19a90 892 ieee80211_led_assoc(local, 1);
9306102e 893
e5b900d2
JB		 894 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
895 bss_conf->dtim_period = bss->dtim_period;
896 else
897 bss_conf->dtim_period = 0;
898
68542962 899 bss_conf->assoc = 1;
96dd22ac
JB		 900 /*
901 * For now just always ask the driver to update the basic rateset
902 * when we have associated, we aren't checking whether it actually
903 * changed or not.
904 */
ae5eb026 905 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 906
907 /* And the BSSID changed - we're associated now */
908 bss_info_changed |= BSS_CHANGED_BSSID;
909
a97c13c3
JO		 910 /* Tell the driver to monitor connection quality (if supported) */
911 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 912 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 913 bss_info_changed |= BSS_CHANGED_CQM;
914
68542962
JO		 915 /* Enable ARP filtering */
916 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
917 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
918 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
919 }
920
ae5eb026 921 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 922
056508dc
JB		 923 mutex_lock(&local->iflist_mtx);
924 ieee80211_recalc_ps(local, -1);
025e6be2 925 ieee80211_recalc_smps(local);
056508dc 926 mutex_unlock(&local->iflist_mtx);
e0cb686f 927
8a5b33f5 928 netif_tx_start_all_queues(sdata->dev);
9ac19a90 929 netif_carrier_on(sdata->dev);
f0706e82
JB		 930}
931
e69e95db 932static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 933 bool remove_sta, bool tx)
aa458d17 934{
46900298 935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 936 struct ieee80211_local *local = sdata->local;
937 struct sta_info *sta;
e0cb686f 938 u32 changed = 0, config_changed = 0;
b291ba11 939 u8 bssid[ETH_ALEN];
aa458d17 940
77fdaa12
JB		 941 ASSERT_MGD_MTX(ifmgd);
942
b291ba11
JB		 943 if (WARN_ON(!ifmgd->associated))
944 return;
945
0c1ad2ca 946 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 947
77fdaa12
JB		 948 ifmgd->associated = NULL;
949 memset(ifmgd->bssid, 0, ETH_ALEN);
950
951 /*
952 * we need to commit the associated = NULL change because the
953 * scan code uses that to determine whether this iface should
954 * go to/wake up from powersave or not -- and could otherwise
955 * wake the queues erroneously.
956 */
957 smp_mb();
958
959 /*
960 * Thus, we can only afterwards stop the queues -- to account
961 * for the case where another CPU is finishing a scan at this
962 * time -- we don't want the scan code to enable queues.
963 */
aa458d17 964
8a5b33f5 965 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 966 netif_carrier_off(sdata->dev);
967
2a419056 968 mutex_lock(&local->sta_mtx);
abe60632 969 sta = sta_info_get(sdata, bssid);
4cad6c7c 970 if (sta) {
2a419056 971 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 972 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 973 }
2a419056 974 mutex_unlock(&local->sta_mtx);
aa458d17 975
f5e5bf25
TW		 976 changed |= ieee80211_reset_erp_info(sdata);
977
f5e5bf25 978 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 979 changed |= BSS_CHANGED_ASSOC;
980 sdata->vif.bss_conf.assoc = false;
f5e5bf25 981
aa837e1d
JB		 982 ieee80211_set_wmm_default(sdata);
983
4797938c 984 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 985 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 986
413ad50a
JB		 987 /* on the next assoc, re-program HT parameters */
988 sdata->ht_opmode_valid = false;
989
a8302de9
VT		 990 local->power_constr_level = 0;
991
520eb820
KV		 992 del_timer_sync(&local->dynamic_ps_timer);
993 cancel_work_sync(&local->dynamic_ps_enable_work);
994
e0cb686f
KV		 995 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
996 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
997 config_changed |= IEEE80211_CONF_CHANGE_PS;
998 }
ae5eb026 999
e0cb686f 1000 ieee80211_hw_config(local, config_changed);
9cef8737 1001
68542962
JO		 1002 /* Disable ARP filtering */
1003 if (sdata->vif.bss_conf.arp_filter_enabled) {
1004 sdata->vif.bss_conf.arp_filter_enabled = false;
1005 changed |= BSS_CHANGED_ARP_FILTER;
1006 }
1007
0aaffa9b
JB		 1008 /* The BSSID (not really interesting) and HT changed */
1009 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1010 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1011
e69e95db
JM		 1012 if (remove_sta)
1013 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1014
1015 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1016 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1017 del_timer_sync(&sdata->u.mgd.timer);
1018 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1019}
f0706e82 1020
3cf335d5
KV		 1021void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1022 struct ieee80211_hdr *hdr)
1023{
1024 /*
1025 * We can postpone the mgd.timer whenever receiving unicast frames
1026 * from AP because we know that the connection is working both ways
1027 * at that time. But multicast frames (and hence also beacons) must
1028 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1029 * data idle periods for sending the periodic probe request to the
1030 * AP we're connected to.
3cf335d5 1031 */
b291ba11
JB		 1032 if (is_multicast_ether_addr(hdr->addr1))
1033 return;
1034
be099e82 1035 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1036}
f0706e82 1037
4e5ff376
FF		 1038static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1039{
1040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1041
1042 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1043 IEEE80211_STA_CONNECTION_POLL)))
1044 return;
1045
1046 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1047 IEEE80211_STA_BEACON_POLL);
1048 mutex_lock(&sdata->local->iflist_mtx);
1049 ieee80211_recalc_ps(sdata->local, -1);
1050 mutex_unlock(&sdata->local->iflist_mtx);
1051
1052 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1053 return;
1054
1055 /*
1056 * We've received a probe response, but are not sure whether
1057 * we have or will be receiving any beacons or data, so let's
1058 * schedule the timers again, just in case.
1059 */
1060 ieee80211_sta_reset_beacon_monitor(sdata);
1061
1062 mod_timer(&ifmgd->conn_mon_timer,
1063 round_jiffies_up(jiffies +
1064 IEEE80211_CONNECTION_IDLE_TIME));
1065}
1066
1067void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1068 struct ieee80211_hdr *hdr)
1069{
1070 if (!ieee80211_is_data(hdr->frame_control) &&
1071 !ieee80211_is_nullfunc(hdr->frame_control))
1072 return;
1073
1074 ieee80211_sta_reset_conn_monitor(sdata);
1075
1076 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1077 sdata->u.mgd.probe_send_count > 0) {
1078 sdata->u.mgd.probe_send_count = 0;
1079 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1080 }
1081}
1082
a43abf29
ML		 1083static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1084{
1085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1086 const u8 *ssid;
f01a067d
LR		 1087 u8 *dst = ifmgd->associated->bssid;
1088 u8 unicast_limit = max(1, IEEE80211_MAX_PROBE_TRIES - 3);
1089
1090 /*
1091 * Try sending broadcast probe requests for the last three
1092 * probe requests after the first ones failed since some
1093 * buggy APs only support broadcast probe requests.
1094 */
1095 if (ifmgd->probe_send_count >= unicast_limit)
1096 dst = NULL;
a43abf29 1097
4e5ff376
FF		 1098 /*
1099 * When the hardware reports an accurate Tx ACK status, it's
1100 * better to send a nullfunc frame instead of a probe request,
1101 * as it will kick us off the AP quickly if we aren't associated
1102 * anymore. The timeout will be reset if the frame is ACKed by
1103 * the AP.
1104 */
1105 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1106 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1107 else {
1108 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1109 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
1110 }
a43abf29
ML		 1111
1112 ifmgd->probe_send_count++;
1113 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1114 run_again(ifmgd, ifmgd->probe_timeout);
1115}
1116
b291ba11
JB		 1117static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1118 bool beacon)
04de8381 1119{
04de8381 1120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1121 bool already = false;
34bfc411 1122
9607e6b6 1123 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1124 return;
1125
91a3bd76
LR		 1126 if (sdata->local->scanning)
1127 return;
1128
b8bc4b0a
JB		 1129 if (sdata->local->tmp_channel)
1130 return;
1131
77fdaa12
JB		 1132 mutex_lock(&ifmgd->mtx);
1133
1134 if (!ifmgd->associated)
1135 goto out;
1136
a860402d 1137#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1138 if (beacon && net_ratelimit())
1139 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1140 "- sending probe request\n", sdata->name);
a860402d 1141#endif
04de8381 1142
b291ba11
JB		 1143 /*
1144 * The driver/our work has already reported this event or the
1145 * connection monitoring has kicked in and we have already sent
1146 * a probe request. Or maybe the AP died and the driver keeps
1147 * reporting until we disassociate...
1148 *
1149 * In either case we have to ignore the current call to this
1150 * function (except for setting the correct probe reason bit)
1151 * because otherwise we would reset the timer every time and
1152 * never check whether we received a probe response!
1153 */
1154 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1155 IEEE80211_STA_CONNECTION_POLL))
1156 already = true;
1157
1158 if (beacon)
1159 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1160 else
1161 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1162
1163 if (already)
1164 goto out;
1165
4e751843
JB		 1166 mutex_lock(&sdata->local->iflist_mtx);
1167 ieee80211_recalc_ps(sdata->local, -1);
1168 mutex_unlock(&sdata->local->iflist_mtx);
1169
a43abf29
ML		 1170 ifmgd->probe_send_count = 0;
1171 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1172 out:
1173 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1174}
1175
a619a4c0
JO		 1176struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1177 struct ieee80211_vif *vif)
1178{
1179 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1181 struct sk_buff *skb;
1182 const u8 *ssid;
1183
1184 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1185 return NULL;
1186
1187 ASSERT_MGD_MTX(ifmgd);
1188
1189 if (!ifmgd->associated)
1190 return NULL;
1191
1192 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1193 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1194 ssid + 2, ssid[1], NULL, 0);
1195
1196 return skb;
1197}
1198EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1199
1e4dcd01
JO		 1200static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1201{
1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1203 struct ieee80211_local *local = sdata->local;
1204 u8 bssid[ETH_ALEN];
1205
1206 mutex_lock(&ifmgd->mtx);
1207 if (!ifmgd->associated) {
1208 mutex_unlock(&ifmgd->mtx);
1209 return;
1210 }
1211
1212 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1213
1214 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1215
53f73c09 1216 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1217 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1218
1219 mutex_lock(&local->mtx);
1220 ieee80211_recalc_idle(local);
1221 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1222 /*
1223 * must be outside lock due to cfg80211,
1224 * but that's not a problem.
1225 */
1226 ieee80211_send_deauth_disassoc(sdata, bssid,
1227 IEEE80211_STYPE_DEAUTH,
1228 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1229 NULL, true);
1e4dcd01
JO		 1230}
1231
1232void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1233{
1234 struct ieee80211_sub_if_data *sdata =
1235 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1236 u.mgd.beacon_connection_loss_work);
b291ba11 1237
1e4dcd01
JO		 1238 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1239 __ieee80211_connection_loss(sdata);
1240 else
1241 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1242}
1243
04de8381
KV		 1244void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1245{
1246 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1247 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1248
b5878a2d
JB		 1249 trace_api_beacon_loss(sdata);
1250
1e4dcd01
JO		 1251 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1252 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1253}
1254EXPORT_SYMBOL(ieee80211_beacon_loss);
1255
1e4dcd01
JO		 1256void ieee80211_connection_loss(struct ieee80211_vif *vif)
1257{
1258 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1259 struct ieee80211_hw *hw = &sdata->local->hw;
1260
b5878a2d
JB		 1261 trace_api_connection_loss(sdata);
1262
1e4dcd01
JO		 1263 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1264 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1265}
1266EXPORT_SYMBOL(ieee80211_connection_loss);
1267
1268
77fdaa12
JB		 1269static enum rx_mgmt_action __must_check
1270ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1271 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1272{
46900298 1273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1274 const u8 *bssid = NULL;
f0706e82
JB		 1275 u16 reason_code;
1276
f4ea83dd 1277 if (len < 24 + 2)
77fdaa12 1278 return RX_MGMT_NONE;
f0706e82 1279
77fdaa12
JB		 1280 ASSERT_MGD_MTX(ifmgd);
1281
0c1ad2ca 1282 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1283
1284 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1285
77fdaa12 1286 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1287 sdata->name, bssid, reason_code);
77fdaa12 1288
53f73c09 1289 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1290 mutex_lock(&sdata->local->mtx);
63f170e0 1291 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1292 mutex_unlock(&sdata->local->mtx);
f0706e82 1293
77fdaa12 1294 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1295}
1296
1297
77fdaa12
JB		 1298static enum rx_mgmt_action __must_check
1299ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1301{
46900298 1302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1303 u16 reason_code;
1304
f4ea83dd 1305 if (len < 24 + 2)
77fdaa12 1306 return RX_MGMT_NONE;
f0706e82 1307
77fdaa12
JB		 1308 ASSERT_MGD_MTX(ifmgd);
1309
1310 if (WARN_ON(!ifmgd->associated))
1311 return RX_MGMT_NONE;
1312
0c1ad2ca 1313 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1314 return RX_MGMT_NONE;
f0706e82
JB		 1315
1316 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1317
0ff71613 1318 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1319 sdata->name, mgmt->sa, reason_code);
f0706e82 1320
53f73c09 1321 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1322 mutex_lock(&sdata->local->mtx);
bc83b681 1323 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1324 mutex_unlock(&sdata->local->mtx);
77fdaa12 1325 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1326}
1327
1328
af6b6374
JB		 1329static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1330 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1331{
af6b6374 1332 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1334 struct ieee80211_local *local = sdata->local;
8318d78a 1335 struct ieee80211_supported_band *sband;
f0706e82 1336 struct sta_info *sta;
0c1ad2ca 1337 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1338 u8 *pos;
881d948c 1339 u32 rates, basic_rates;
af6b6374 1340 u16 capab_info, aid;
f0706e82 1341 struct ieee802_11_elems elems;
bda3933a 1342 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1343 u32 changed = 0;
5d1ec85f
JB		 1344 int i, j, err;
1345 bool have_higher_than_11mbit = false;
ae5eb026 1346 u16 ap_ht_cap_flags;
f0706e82 1347
af6b6374 1348 /* AssocResp and ReassocResp have identical structure */
f0706e82 1349
f0706e82 1350 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1351 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1352
1dd84aa2
JB		 1353 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1354 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1355 "set\n", sdata->name, aid);
1dd84aa2
JB		 1356 aid &= ~(BIT(15) | BIT(14));
1357
af6b6374
JB		 1358 pos = mgmt->u.assoc_resp.variable;
1359 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1360
f0706e82
JB		 1361 if (!elems.supp_rates) {
1362 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1363 sdata->name);
af6b6374 1364 return false;
f0706e82
JB		 1365 }
1366
46900298 1367 ifmgd->aid = aid;
f0706e82 1368
0c1ad2ca 1369 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1370 if (!sta) {
5d1ec85f
JB		 1371 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1372 " the AP\n", sdata->name);
af6b6374 1373 return false;
77fdaa12 1374 }
05e5e883 1375
5d1ec85f
JB		 1376 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1377 WLAN_STA_ASSOC_AP);
1378 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1379 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1380
60f8b39c
JB		 1381 rates = 0;
1382 basic_rates = 0;
e7480bbb 1383 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1384
60f8b39c
JB		 1385 for (i = 0; i < elems.supp_rates_len; i++) {
1386 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1387 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1388
60f8b39c
JB		 1389 if (rate > 110)
1390 have_higher_than_11mbit = true;
1391
1392 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1393 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1394 rates |= BIT(j);
d61272cb
TW		 1395 if (is_basic)
1396 basic_rates |= BIT(j);
1397 break;
1398 }
f709fc69 1399 }
f709fc69
LCC		 1400 }
1401
60f8b39c
JB		 1402 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1403 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1404 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1405
60f8b39c
JB		 1406 if (rate > 110)
1407 have_higher_than_11mbit = true;
f0706e82 1408
60f8b39c 1409 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1410 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1411 rates |= BIT(j);
d61272cb
TW		 1412 if (is_basic)
1413 basic_rates |= BIT(j);
1414 break;
1415 }
60f8b39c 1416 }
1ebebea8 1417 }
f0706e82 1418
e7480bbb 1419 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1420 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1421
1422 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1423 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1424 have_higher_than_11mbit)
1425 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1426 else
1427 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1428
ab1faead 1429 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1430 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1431 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1432
1433 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1434
4b7679a5 1435 rate_control_rate_init(sta);
f0706e82 1436
46900298 1437 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1438 set_sta_flags(sta, WLAN_STA_MFP);
1439
ddf4ac53 1440 if (elems.wmm_param)
60f8b39c 1441 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1442
5d1ec85f
JB		 1443 err = sta_info_insert(sta);
1444 sta = NULL;
1445 if (err) {
1446 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1447 " the AP (error %d)\n", sdata->name, err);
90be561b 1448 return false;
ddf4ac53
JB		 1449 }
1450
f2176d72
JO		 1451 /*
1452 * Always handle WMM once after association regardless
1453 * of the first value the AP uses. Setting -1 here has
1454 * that effect because the AP values is an unsigned
1455 * 4-bit value.
1456 */
1457 ifmgd->wmm_last_param_set = -1;
1458
ddf4ac53 1459 if (elems.wmm_param)
4ced3f74 1460 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1461 elems.wmm_param_len);
aa837e1d
JB		 1462 else
1463 ieee80211_set_wmm_default(sdata);
f0706e82 1464
e4da8c37
JB		 1465 local->oper_channel = wk->chan;
1466
ae5eb026 1467 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1468 (sdata->local->hw.queues >= 4) &&
ab1faead 1469 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1470 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1471 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1472
60f8b39c
JB		 1473 /* set AID and assoc capability,
1474 * ieee80211_set_associated() will tell the driver */
1475 bss_conf->aid = aid;
1476 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1477 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1478
d524215f
FF		 1479 /*
1480 * If we're using 4-addr mode, let the AP know that we're
1481 * doing so, so that it can create the STA VLAN on its side
1482 */
1483 if (ifmgd->use_4addr)
1484 ieee80211_send_4addr_nullfunc(local, sdata);
1485
15b7b062 1486 /*
b291ba11
JB		 1487 * Start timer to probe the connection to the AP now.
1488 * Also start the timer that will detect beacon loss.
15b7b062 1489 */
b291ba11 1490 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1491 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1492
af6b6374 1493 return true;
f0706e82
JB		 1494}
1495
1496
98c8fccf
JB		 1497static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1498 struct ieee80211_mgmt *mgmt,
1499 size_t len,
1500 struct ieee80211_rx_status *rx_status,
1501 struct ieee802_11_elems *elems,
1502 bool beacon)
1503{
1504 struct ieee80211_local *local = sdata->local;
1505 int freq;
c2b13452 1506 struct ieee80211_bss *bss;
98c8fccf 1507 struct ieee80211_channel *channel;
56007a02
JB		 1508 bool need_ps = false;
1509
1510 if (sdata->u.mgd.associated) {
1511 bss = (void *)sdata->u.mgd.associated->priv;
1512 /* not previously set so we may need to recalc */
1513 need_ps = !bss->dtim_period;
1514 }
98c8fccf
JB		 1515
1516 if (elems->ds_params && elems->ds_params_len == 1)
1517 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1518 else
1519 freq = rx_status->freq;
1520
1521 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1522
1523 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1524 return;
1525
98c8fccf 1526 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1527 channel, beacon);
77fdaa12
JB		 1528 if (bss)
1529 ieee80211_rx_bss_put(local, bss);
1530
1531 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1532 return;
1533
56007a02
JB		 1534 if (need_ps) {
1535 mutex_lock(&local->iflist_mtx);
1536 ieee80211_recalc_ps(local, -1);
1537 mutex_unlock(&local->iflist_mtx);
1538 }
1539
c481ec97 1540 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1541 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1542 ETH_ALEN) == 0)) {
c481ec97
S		 1543 struct ieee80211_channel_sw_ie *sw_elem =
1544 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1545 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1546 bss, rx_status->mactime);
c481ec97 1547 }
f0706e82
JB		 1548}
1549
1550
f698d856 1551static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1552 struct sk_buff *skb)
f0706e82 1553{
af6b6374 1554 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1555 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1556 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1557 size_t baselen, len = skb->len;
ae6a44e3
EK		 1558 struct ieee802_11_elems elems;
1559
15b7b062
KV		 1560 ifmgd = &sdata->u.mgd;
1561
77fdaa12
JB		 1562 ASSERT_MGD_MTX(ifmgd);
1563
47846c9b 1564 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1565 return; /* ignore ProbeResp to foreign address */
1566
ae6a44e3
EK		 1567 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1568 if (baselen > len)
1569 return;
1570
1571 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1572 &elems);
1573
98c8fccf 1574 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1575
77fdaa12 1576 if (ifmgd->associated &&
4e5ff376
FF		 1577 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1578 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1579}
1580
d91f36db
JB		 1581/*
1582 * This is the canonical list of information elements we care about,
1583 * the filter code also gives us all changes to the Microsoft OUI
1584 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1585 *
1586 * We implement beacon filtering in software since that means we can
1587 * avoid processing the frame here and in cfg80211, and userspace
1588 * will not be able to tell whether the hardware supports it or not.
1589 *
1590 * XXX: This list needs to be dynamic -- userspace needs to be able to
1591 * add items it requires. It also needs to be able to tell us to
1592 * look out for other vendor IEs.
1593 */
1594static const u64 care_about_ies =
1d4df3a5
JB		 1595 (1ULL << WLAN_EID_COUNTRY) |
1596 (1ULL << WLAN_EID_ERP_INFO) |
1597 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1598 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1599 (1ULL << WLAN_EID_HT_CAPABILITY) |
1600 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1601
f698d856 1602static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1603 struct ieee80211_mgmt *mgmt,
1604 size_t len,
1605 struct ieee80211_rx_status *rx_status)
1606{
d91f36db 1607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1608 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1609 size_t baselen;
1610 struct ieee802_11_elems elems;
f698d856 1611 struct ieee80211_local *local = sdata->local;
471b3efd 1612 u32 changed = 0;
d91f36db 1613 bool erp_valid, directed_tim = false;
7a5158ef 1614 u8 erp_value = 0;
d91f36db 1615 u32 ncrc;
77fdaa12
JB		 1616 u8 *bssid;
1617
1618 ASSERT_MGD_MTX(ifmgd);
f0706e82 1619
ae6a44e3
EK		 1620 /* Process beacon from the current BSS */
1621 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1622 if (baselen > len)
1623 return;
1624
d91f36db 1625 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1626 return;
f0706e82 1627
b291ba11
JB		 1628 /*
1629 * We might have received a number of frames, among them a
1630 * disassoc frame and a beacon...
1631 */
1632 if (!ifmgd->associated)
77fdaa12
JB		 1633 return;
1634
0c1ad2ca 1635 bssid = ifmgd->associated->bssid;
77fdaa12 1636
b291ba11
JB		 1637 /*
1638 * And in theory even frames from a different AP we were just
1639 * associated to a split-second ago!
1640 */
1641 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1642 return;
1643
17e4ec14
JM		 1644 /* Track average RSSI from the Beacon frames of the current AP */
1645 ifmgd->last_beacon_signal = rx_status->signal;
1646 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1647 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1648 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1649 ifmgd->last_cqm_event_signal = 0;
391a200a 1650 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1651 } else {
1652 ifmgd->ave_beacon_signal =
1653 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1654 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1655 ifmgd->ave_beacon_signal) / 16;
391a200a 1656 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1657 }
1658 if (bss_conf->cqm_rssi_thold &&
391a200a 1659 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1660 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1661 int sig = ifmgd->ave_beacon_signal / 16;
1662 int last_event = ifmgd->last_cqm_event_signal;
1663 int thold = bss_conf->cqm_rssi_thold;
1664 int hyst = bss_conf->cqm_rssi_hyst;
1665 if (sig < thold &&
1666 (last_event == 0 || sig < last_event - hyst)) {
1667 ifmgd->last_cqm_event_signal = sig;
1668 ieee80211_cqm_rssi_notify(
1669 &sdata->vif,
1670 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1671 GFP_KERNEL);
1672 } else if (sig > thold &&
1673 (last_event == 0 || sig > last_event + hyst)) {
1674 ifmgd->last_cqm_event_signal = sig;
1675 ieee80211_cqm_rssi_notify(
1676 &sdata->vif,
1677 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1678 GFP_KERNEL);
1679 }
1680 }
1681
b291ba11 1682 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1683#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1684 if (net_ratelimit()) {
1685 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1686 "to a received beacon\n", sdata->name);
92778180
JM		 1687 }
1688#endif
b291ba11 1689 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1690 mutex_lock(&local->iflist_mtx);
1691 ieee80211_recalc_ps(local, -1);
1692 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1693 }
1694
b291ba11
JB		 1695 /*
1696 * Push the beacon loss detection into the future since
1697 * we are processing a beacon from the AP just now.
1698 */
d3a910a8 1699 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1700
d91f36db
JB		 1701 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1702 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1703 len - baselen, &elems,
1704 care_about_ies, ncrc);
1705
1706 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1707 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1708 ifmgd->aid);
d91f36db 1709
d8ec4433 1710 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1711 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1712 true);
d91f36db 1713
4ced3f74 1714 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1715 elems.wmm_param_len);
1716 }
fe3fa827 1717
25c9c875 1718 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1719 if (directed_tim) {
572e0012
KV		 1720 if (local->hw.conf.dynamic_ps_timeout > 0) {
1721 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1722 ieee80211_hw_config(local,
1723 IEEE80211_CONF_CHANGE_PS);
1724 ieee80211_send_nullfunc(local, sdata, 0);
1725 } else {
1726 local->pspolling = true;
1727
1728 /*
1729 * Here is assumed that the driver will be
1730 * able to send ps-poll frame and receive a
1731 * response even though power save mode is
1732 * enabled, but some drivers might require
1733 * to disable power save here. This needs
1734 * to be investigated.
1735 */
1736 ieee80211_send_pspoll(local, sdata);
1737 }
a97b77b9
VN		 1738 }
1739 }
7a5158ef 1740
d8ec4433 1741 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1742 return;
1743 ifmgd->beacon_crc = ncrc;
d8ec4433 1744 ifmgd->beacon_crc_valid = true;
30196673 1745
7a5158ef
JB		 1746 if (elems.erp_info && elems.erp_info_len >= 1) {
1747 erp_valid = true;
1748 erp_value = elems.erp_info[0];
1749 } else {
1750 erp_valid = false;
50c4afb9 1751 }
7a5158ef
JB		 1752 changed |= ieee80211_handle_bss_capability(sdata,
1753 le16_to_cpu(mgmt->u.beacon.capab_info),
1754 erp_valid, erp_value);
f0706e82 1755
d3c990fb 1756
53d6f81c 1757 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1758 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1759 struct sta_info *sta;
1760 struct ieee80211_supported_band *sband;
1761 u16 ap_ht_cap_flags;
1762
1763 rcu_read_lock();
1764
abe60632 1765 sta = sta_info_get(sdata, bssid);
77fdaa12 1766 if (WARN_ON(!sta)) {
ae5eb026
JB		 1767 rcu_read_unlock();
1768 return;
1769 }
1770
1771 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1772
1773 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1774 elems.ht_cap_elem, &sta->sta.ht_cap);
1775
1776 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1777
1778 rcu_read_unlock();
1779
1780 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1781 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1782 }
1783
8b19e6ca 1784 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1785 if (elems.country_elem) {
a8302de9
VT		 1786 /* TODO: IBSS also needs this */
1787 if (elems.pwr_constr_elem)
1788 ieee80211_handle_pwr_constr(sdata,
1789 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1790 elems.pwr_constr_elem,
1791 elems.pwr_constr_elem_len);
3f2355cb
LR		 1792 }
1793
471b3efd 1794 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1795}
1796
1fa57d01
JB		 1797void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1798 struct sk_buff *skb)
f0706e82 1799{
77fdaa12 1800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1801 struct ieee80211_rx_status *rx_status;
f0706e82 1802 struct ieee80211_mgmt *mgmt;
77fdaa12 1803 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1804 u16 fc;
1805
f0706e82
JB		 1806 rx_status = (struct ieee80211_rx_status *) skb->cb;
1807 mgmt = (struct ieee80211_mgmt *) skb->data;
1808 fc = le16_to_cpu(mgmt->frame_control);
1809
77fdaa12
JB		 1810 mutex_lock(&ifmgd->mtx);
1811
1812 if (ifmgd->associated &&
0c1ad2ca 1813 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1814 switch (fc & IEEE80211_FCTL_STYPE) {
1815 case IEEE80211_STYPE_BEACON:
1816 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1817 rx_status);
1818 break;
1819 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1820 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1821 break;
1822 case IEEE80211_STYPE_DEAUTH:
63f170e0 1823 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1824 break;
1825 case IEEE80211_STYPE_DISASSOC:
1826 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1827 break;
1828 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1829 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1830 case WLAN_CATEGORY_SPECTRUM_MGMT:
1831 ieee80211_sta_process_chanswitch(sdata,
1832 &mgmt->u.action.u.chan_switch.sw_elem,
1833 (void *)ifmgd->associated->priv,
1834 rx_status->mactime);
1835 break;
1836 }
77fdaa12
JB		 1837 }
1838 mutex_unlock(&ifmgd->mtx);
1839
1840 switch (rma) {
1841 case RX_MGMT_NONE:
1842 /* no action */
1843 break;
1844 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1845 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1846 break;
1847 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1848 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1849 break;
1850 default:
1851 WARN(1, "unexpected: %d", rma);
1852 }
36b3a628 1853 return;
77fdaa12
JB		 1854 }
1855
77fdaa12
JB		 1856 mutex_unlock(&ifmgd->mtx);
1857
63f170e0 1858 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1859 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1860 struct ieee80211_local *local = sdata->local;
1861 struct ieee80211_work *wk;
1862
a1699b75 1863 mutex_lock(&local->mtx);
b054b747
JB		 1864 list_for_each_entry(wk, &local->work_list, list) {
1865 if (wk->sdata != sdata)
1866 continue;
1867
e5b900d2
JB		 1868 if (wk->type != IEEE80211_WORK_ASSOC &&
1869 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1870 continue;
1871
1872 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1873 continue;
1874 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1875 continue;
1876
1877 /*
1878 * Printing the message only here means we can't
1879 * spuriously print it, but it also means that it
1880 * won't be printed when the frame comes in before
1881 * we even tried to associate or in similar cases.
1882 *
1883 * Ultimately, I suspect cfg80211 should print the
1884 * messages instead.
1885 */
1886 printk(KERN_DEBUG
1887 "%s: deauthenticated from %pM (Reason: %u)\n",
1888 sdata->name, mgmt->bssid,
1889 le16_to_cpu(mgmt->u.deauth.reason_code));
1890
1891 list_del_rcu(&wk->list);
1892 free_work(wk);
1893 break;
1894 }
a1699b75 1895 mutex_unlock(&local->mtx);
f0706e82 1896
ce470613 1897 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1898 }
f0706e82
JB		 1899}
1900
9c6bd790 1901static void ieee80211_sta_timer(unsigned long data)
f0706e82 1902{
60f8b39c
JB		 1903 struct ieee80211_sub_if_data *sdata =
1904 (struct ieee80211_sub_if_data *) data;
46900298 1905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1906 struct ieee80211_local *local = sdata->local;
f0706e82 1907
5bb644a0
JB		 1908 if (local->quiescing) {
1909 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1910 return;
1911 }
1912
64592c8f 1913 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1914}
1915
1fa57d01 1916void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1917{
9c6bd790 1918 struct ieee80211_local *local = sdata->local;
1fa57d01 1919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1920
77fdaa12
JB		 1921 /* then process the rest of the work */
1922 mutex_lock(&ifmgd->mtx);
1923
b291ba11
JB		 1924 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1925 IEEE80211_STA_CONNECTION_POLL) &&
1926 ifmgd->associated) {
a43abf29 1927 u8 bssid[ETH_ALEN];
72a8a3ed 1928 int max_tries;
a43abf29 1929
0c1ad2ca 1930 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 1931
72a8a3ed
FF		 1932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1933 max_tries = IEEE80211_MAX_NULLFUNC_TRIES;
1934 else
1935 max_tries = IEEE80211_MAX_PROBE_TRIES;
1936
4e5ff376
FF		 1937 /* ACK received for nullfunc probing frame */
1938 if (!ifmgd->probe_send_count)
1939 ieee80211_reset_ap_probe(sdata);
1940
1941 else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 1942 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29 1943
72a8a3ed 1944 else if (ifmgd->probe_send_count < max_tries) {
a43abf29 1945#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 1946 wiphy_debug(local->hw.wiphy,
1947 "%s: No probe response from AP %pM"
1948 " after %dms, try %d\n",
1949 sdata->name,
1950 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ,
1951 ifmgd->probe_send_count);
a43abf29
ML		 1952#endif
1953 ieee80211_mgd_probe_ap_send(sdata);
1954 } else {
b291ba11
JB		 1955 /*
1956 * We actually lost the connection ... or did we?
1957 * Let's make sure!
1958 */
1959 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1960 IEEE80211_STA_BEACON_POLL);
b38afa87
BG		 1961 wiphy_debug(local->hw.wiphy,
1962 "%s: No probe response from AP %pM"
1963 " after %dms, disconnecting.\n",
1964 sdata->name,
1965 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
53f73c09 1966 ieee80211_set_disassoc(sdata, true, true);
b291ba11 1967 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1968 mutex_lock(&local->mtx);
1969 ieee80211_recalc_idle(local);
1970 mutex_unlock(&local->mtx);
b291ba11
JB		 1971 /*
1972 * must be outside lock due to cfg80211,
1973 * but that's not a problem.
1974 */
1975 ieee80211_send_deauth_disassoc(sdata, bssid,
1976 IEEE80211_STYPE_DEAUTH,
1977 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1978 NULL, true);
b291ba11
JB		 1979 mutex_lock(&ifmgd->mtx);
1980 }
1981 }
1982
77fdaa12 1983 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 1984}
1985
b291ba11
JB		 1986static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1987{
1988 struct ieee80211_sub_if_data *sdata =
1989 (struct ieee80211_sub_if_data *) data;
1990 struct ieee80211_local *local = sdata->local;
1991
1992 if (local->quiescing)
1993 return;
1994
1e4dcd01
JO		 1995 ieee80211_queue_work(&sdata->local->hw,
1996 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 1997}
1998
1999static void ieee80211_sta_conn_mon_timer(unsigned long data)
2000{
2001 struct ieee80211_sub_if_data *sdata =
2002 (struct ieee80211_sub_if_data *) data;
2003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2004 struct ieee80211_local *local = sdata->local;
2005
2006 if (local->quiescing)
2007 return;
2008
42935eca 2009 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2010}
2011
2012static void ieee80211_sta_monitor_work(struct work_struct *work)
2013{
2014 struct ieee80211_sub_if_data *sdata =
2015 container_of(work, struct ieee80211_sub_if_data,
2016 u.mgd.monitor_work);
2017
2018 ieee80211_mgd_probe_ap(sdata, false);
2019}
2020
9c6bd790
JB		 2021static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2022{
ad935687 2023 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2024 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2025 IEEE80211_STA_CONNECTION_POLL);
ad935687 2026
b291ba11 2027 /* let's probe the connection once */
42935eca 2028 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2029 &sdata->u.mgd.monitor_work);
2030 /* and do all the other regular work too */
64592c8f 2031 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2032 }
9c6bd790 2033}
f0706e82 2034
5bb644a0
JB		 2035#ifdef CONFIG_PM
2036void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2037{
2038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2039
2040 /*
2041 * we need to use atomic bitops for the running bits
2042 * only because both timers might fire at the same
2043 * time -- the code here is properly synchronised.
2044 */
2045
d1f5b7a3
JB		 2046 cancel_work_sync(&ifmgd->request_smps_work);
2047
1e4dcd01 2048 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2049 if (del_timer_sync(&ifmgd->timer))
2050 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2051
2052 cancel_work_sync(&ifmgd->chswitch_work);
2053 if (del_timer_sync(&ifmgd->chswitch_timer))
2054 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2055
2056 cancel_work_sync(&ifmgd->monitor_work);
2057 /* these will just be re-established on connection */
2058 del_timer_sync(&ifmgd->conn_mon_timer);
2059 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2060}
2061
2062void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2063{
2064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2065
2066 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2067 add_timer(&ifmgd->timer);
2068 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2069 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2070 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2071 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2072}
2073#endif
2074
9c6bd790
JB		 2075/* interface setup */
2076void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2077{
46900298 2078 struct ieee80211_if_managed *ifmgd;
988c0f72 2079
46900298 2080 ifmgd = &sdata->u.mgd;
b291ba11 2081 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2082 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2083 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2084 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2085 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2086 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2087 (unsigned long) sdata);
b291ba11
JB		 2088 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2089 (unsigned long) sdata);
2090 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2091 (unsigned long) sdata);
46900298 2092 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2093 (unsigned long) sdata);
9c6bd790 2094
ab1faead 2095 ifmgd->flags = 0;
bbbdff9e 2096
77fdaa12 2097 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2098
2099 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2100 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2101 else
2102 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2103}
2104
77fdaa12
JB		 2105/* scan finished notification */
2106void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2107{
77fdaa12 2108 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2109
77fdaa12
JB		 2110 /* Restart STA timers */
2111 rcu_read_lock();
2112 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2113 ieee80211_restart_sta_timer(sdata);
2114 rcu_read_unlock();
2115}
60f8b39c 2116
77fdaa12
JB		 2117int ieee80211_max_network_latency(struct notifier_block *nb,
2118 unsigned long data, void *dummy)
2119{
2120 s32 latency_usec = (s32) data;
2121 struct ieee80211_local *local =
2122 container_of(nb, struct ieee80211_local,
2123 network_latency_notifier);
1fa6f4af 2124
77fdaa12
JB		 2125 mutex_lock(&local->iflist_mtx);
2126 ieee80211_recalc_ps(local, latency_usec);
2127 mutex_unlock(&local->iflist_mtx);
dfe67012 2128
77fdaa12 2129 return 0;
9c6bd790
JB		 2130}
2131
77fdaa12 2132/* config hooks */
af6b6374
JB		 2133static enum work_done_result
2134ieee80211_probe_auth_done(struct ieee80211_work *wk,
2135 struct sk_buff *skb)
2136{
2137 if (!skb) {
2138 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2139 return WORK_DONE_DESTROY;
2140 }
2141
2142 if (wk->type == IEEE80211_WORK_AUTH) {
2143 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2144 return WORK_DONE_DESTROY;
2145 }
2146
2147 mutex_lock(&wk->sdata->u.mgd.mtx);
2148 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2149 mutex_unlock(&wk->sdata->u.mgd.mtx);
2150
2151 wk->type = IEEE80211_WORK_AUTH;
2152 wk->probe_auth.tries = 0;
2153 return WORK_DONE_REQUEUE;
2154}
2155
77fdaa12
JB		 2156int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2157 struct cfg80211_auth_request *req)
9c6bd790 2158{
77fdaa12 2159 const u8 *ssid;
f679f65d 2160 struct ieee80211_work *wk;
77fdaa12 2161 u16 auth_alg;
9c6bd790 2162
d5cdfacb
JM		 2163 if (req->local_state_change)
2164 return 0; /* no need to update mac80211 state */
2165
77fdaa12
JB		 2166 switch (req->auth_type) {
2167 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2168 auth_alg = WLAN_AUTH_OPEN;
2169 break;
2170 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2171 if (IS_ERR(sdata->local->wep_tx_tfm))
2172 return -EOPNOTSUPP;
77fdaa12
JB		 2173 auth_alg = WLAN_AUTH_SHARED_KEY;
2174 break;
2175 case NL80211_AUTHTYPE_FT:
2176 auth_alg = WLAN_AUTH_FT;
2177 break;
2178 case NL80211_AUTHTYPE_NETWORK_EAP:
2179 auth_alg = WLAN_AUTH_LEAP;
2180 break;
2181 default:
2182 return -EOPNOTSUPP;
60f8b39c 2183 }
77fdaa12
JB		 2184
2185 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2186 if (!wk)
9c6bd790 2187 return -ENOMEM;
77fdaa12 2188
5e124bd5 2189 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2190
2191 if (req->ie && req->ie_len) {
2192 memcpy(wk->ie, req->ie, req->ie_len);
2193 wk->ie_len = req->ie_len;
9c6bd790 2194 }
77fdaa12 2195
fffd0934 2196 if (req->key && req->key_len) {
af6b6374
JB		 2197 wk->probe_auth.key_len = req->key_len;
2198 wk->probe_auth.key_idx = req->key_idx;
2199 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2200 }
2201
77fdaa12 2202 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2203 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2204 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2205
af6b6374
JB		 2206 wk->probe_auth.algorithm = auth_alg;
2207 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2208
070bb547
JB		 2209 /* if we already have a probe, don't probe again */
2210 if (req->bss->proberesp_ies)
2211 wk->type = IEEE80211_WORK_AUTH;
2212 else
2213 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2214 wk->chan = req->bss->channel;
af6b6374
JB		 2215 wk->sdata = sdata;
2216 wk->done = ieee80211_probe_auth_done;
77fdaa12 2217
af6b6374 2218 ieee80211_add_work(wk);
9c6bd790 2219 return 0;
60f8b39c
JB		 2220}
2221
af6b6374
JB		 2222static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2223 struct sk_buff *skb)
2224{
2225 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2226 struct ieee80211_rx_status *rx_status;
2227 struct ieee802_11_elems elems;
af6b6374
JB		 2228 u16 status;
2229
2230 if (!skb) {
2231 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2232 return WORK_DONE_DESTROY;
2233 }
2234
e5b900d2
JB		 2235 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2236 mutex_lock(&wk->sdata->u.mgd.mtx);
2237 rx_status = (void *) skb->cb;
2238 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2239 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2240 &elems, true);
2241 mutex_unlock(&wk->sdata->u.mgd.mtx);
2242
2243 wk->type = IEEE80211_WORK_ASSOC;
2244 /* not really done yet */
2245 return WORK_DONE_REQUEUE;
2246 }
2247
af6b6374
JB		 2248 mgmt = (void *)skb->data;
2249 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2250
2251 if (status == WLAN_STATUS_SUCCESS) {
2252 mutex_lock(&wk->sdata->u.mgd.mtx);
2253 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2254 mutex_unlock(&wk->sdata->u.mgd.mtx);
2255 /* oops -- internal error -- send timeout for now */
2256 cfg80211_send_assoc_timeout(wk->sdata->dev,
2257 wk->filter_ta);
2258 return WORK_DONE_DESTROY;
2259 }
68542962
JO		 2260
2261 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2262 }
2263
2264 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2265 return WORK_DONE_DESTROY;
2266}
2267
77fdaa12
JB		 2268int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2269 struct cfg80211_assoc_request *req)
f0706e82 2270{
77fdaa12 2271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2272 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2273 struct ieee80211_work *wk;
63f170e0 2274 const u8 *ssid;
af6b6374 2275 int i;
f0706e82 2276
77fdaa12 2277 mutex_lock(&ifmgd->mtx);
af6b6374 2278 if (ifmgd->associated) {
9c87ba67
JM		 2279 if (!req->prev_bssid ||
2280 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2281 ETH_ALEN)) {
2282 /*
2283 * We are already associated and the request was not a
2284 * reassociation request from the current BSS, so
2285 * reject it.
2286 */
2287 mutex_unlock(&ifmgd->mtx);
2288 return -EALREADY;
2289 }
2290
2291 /* Trying to reassociate - clear previous association state */
53f73c09 2292 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2293 }
2294 mutex_unlock(&ifmgd->mtx);
77fdaa12 2295
63f170e0 2296 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2297 if (!wk)
2298 return -ENOMEM;
77fdaa12 2299
77fdaa12 2300 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2301 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2302
d8ec4433
JO		 2303 ifmgd->beacon_crc_valid = false;
2304
77fdaa12
JB		 2305 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2306 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2307 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2308 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2309 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2310
77fdaa12
JB		 2311
2312 if (req->ie && req->ie_len) {
2313 memcpy(wk->ie, req->ie, req->ie_len);
2314 wk->ie_len = req->ie_len;
2315 } else
2316 wk->ie_len = 0;
2317
0c1ad2ca 2318 wk->assoc.bss = req->bss;
f679f65d 2319
af6b6374 2320 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2321
af6b6374
JB		 2322 /* new association always uses requested smps mode */
2323 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2324 if (ifmgd->powersave)
2325 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2326 else
2327 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2328 } else
2329 ifmgd->ap_smps = ifmgd->req_smps;
2330
2331 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2332 /*
2333 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2334 * We still associate in non-HT mode (11a/b/g) if any one of these
2335 * ciphers is configured as pairwise.
2336 * We can set this to true for non-11n hardware, that'll be checked
2337 * separately along with the peer capabilities.
2338 */
af6b6374 2339 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2340 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2341 wk->assoc.wmm_used = bss->wmm_used;
2342 wk->assoc.supp_rates = bss->supp_rates;
2343 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2344 wk->assoc.ht_information_ie =
2345 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2346
ab13315a
KV		 2347 if (bss->wmm_used && bss->uapsd_supported &&
2348 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2349 wk->assoc.uapsd_used = true;
2350 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2351 } else {
2352 wk->assoc.uapsd_used = false;
2353 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2354 }
2355
63f170e0 2356 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2357 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2358 wk->assoc.ssid_len = ssid[1];
63f170e0 2359
77fdaa12 2360 if (req->prev_bssid)
f679f65d 2361 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2362
f679f65d 2363 wk->chan = req->bss->channel;
af6b6374
JB		 2364 wk->sdata = sdata;
2365 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2366 if (!bss->dtim_period &&
2367 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2368 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2369 else
2370 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2371
2372 if (req->use_mfp) {
2373 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2374 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2375 } else {
2376 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2377 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2378 }
2379
2380 if (req->crypto.control_port)
2381 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2382 else
2383 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2384
a621fa4d
JB		 2385 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2386 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2387
af6b6374
JB		 2388 ieee80211_add_work(wk);
2389 return 0;
f0706e82
JB		 2390}
2391
77fdaa12 2392int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2393 struct cfg80211_deauth_request *req,
2394 void *cookie)
f0706e82 2395{
af6b6374 2396 struct ieee80211_local *local = sdata->local;
46900298 2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2398 struct ieee80211_work *wk;
05e48e8e
JM		 2399 u8 bssid[ETH_ALEN];
2400 bool assoc_bss = false;
f0706e82 2401
77fdaa12
JB		 2402 mutex_lock(&ifmgd->mtx);
2403
05e48e8e 2404 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2405 if (ifmgd->associated == req->bss) {
53f73c09 2406 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2407 mutex_unlock(&ifmgd->mtx);
05e48e8e 2408 assoc_bss = true;
af6b6374
JB		 2409 } else {
2410 bool not_auth_yet = false;
f0706e82 2411
a58ce43f 2412 mutex_unlock(&ifmgd->mtx);
a58ce43f 2413
a1699b75 2414 mutex_lock(&local->mtx);
af6b6374 2415 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2416 if (wk->sdata != sdata)
af6b6374 2417 continue;
29165e4c
JB		 2418
2419 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2420 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2421 wk->type != IEEE80211_WORK_ASSOC &&
2422 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2423 continue;
2424
af6b6374
JB		 2425 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2426 continue;
29165e4c
JB		 2427
2428 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2429 list_del_rcu(&wk->list);
af6b6374
JB		 2430 free_work(wk);
2431 break;
2432 }
a1699b75 2433 mutex_unlock(&local->mtx);
af6b6374
JB		 2434
2435 /*
2436 * If somebody requests authentication and we haven't
2437 * sent out an auth frame yet there's no need to send
2438 * out a deauth frame either. If the state was PROBE,
2439 * then this is the case. If it's AUTH we have sent a
2440 * frame, and if it's IDLE we have completed the auth
2441 * process already.
2442 */
2443 if (not_auth_yet) {
2444 __cfg80211_auth_canceled(sdata->dev, bssid);
2445 return 0;
2446 }
2447 }
77fdaa12 2448
0ff71613 2449 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2450 sdata->name, bssid, req->reason_code);
0ff71613 2451
d5cdfacb
JM		 2452 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2453 req->reason_code, cookie,
2454 !req->local_state_change);
05e48e8e
JM		 2455 if (assoc_bss)
2456 sta_info_destroy_addr(sdata, bssid);
f0706e82 2457
7da7cc1d 2458 mutex_lock(&sdata->local->mtx);
bc83b681 2459 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2460 mutex_unlock(&sdata->local->mtx);
bc83b681 2461
f0706e82
JB		 2462 return 0;
2463}
84363e6e 2464
77fdaa12 2465int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2466 struct cfg80211_disassoc_request *req,
2467 void *cookie)
9c6bd790 2468{
77fdaa12 2469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2470 u8 bssid[ETH_ALEN];
9c6bd790 2471
77fdaa12 2472 mutex_lock(&ifmgd->mtx);
10f644a4 2473
8d8b261a
JB		 2474 /*
2475 * cfg80211 should catch this ... but it's racy since
2476 * we can receive a disassoc frame, process it, hand it
2477 * to cfg80211 while that's in a locked section already
2478 * trying to tell us that the user wants to disconnect.
2479 */
0c1ad2ca 2480 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2481 mutex_unlock(&ifmgd->mtx);
2482 return -ENOLINK;
2483 }
2484
0ff71613 2485 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2486 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2487
e69e95db 2488 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2489 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2490
2491 mutex_unlock(&ifmgd->mtx);
10f644a4 2492
77fdaa12 2493 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2494 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2495 cookie, !req->local_state_change);
e69e95db 2496 sta_info_destroy_addr(sdata, bssid);
bc83b681 2497
7da7cc1d 2498 mutex_lock(&sdata->local->mtx);
bc83b681 2499 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2500 mutex_unlock(&sdata->local->mtx);
bc83b681 2501
10f644a4
JB		 2502 return 0;
2503}
026331c4 2504
a97c13c3
JO		 2505void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2506 enum nl80211_cqm_rssi_threshold_event rssi_event,
2507 gfp_t gfp)
2508{
2509 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2510
b5878a2d
JB		 2511 trace_api_cqm_rssi_notify(sdata, rssi_event);
2512
a97c13c3
JO		 2513 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2514}
2515EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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