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