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iwlwifi: correct frequency settings
[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 !=
59eb21a6 179 ieee80211_channel_to_frequency(hti->control_chan, sband->band))
d5522e03
JB		 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;
59eb21a6
BR		 432 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
433 cbss->channel->band);
cc32abd4 434
77fdaa12
JB		 435 ASSERT_MGD_MTX(ifmgd);
436
437 if (!ifmgd->associated)
cc32abd4
JB		 438 return;
439
fbe9c429 440 if (sdata->local->scanning)
cc32abd4
JB		 441 return;
442
443 /* Disregard subsequent beacons if we are already running a timer
444 processing a CSA */
445
446 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
447 return;
448
449 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
450 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
451 return;
452
453 sdata->local->csa_channel = new_ch;
454
5ce6e438
JB		 455 if (sdata->local->ops->channel_switch) {
456 /* use driver's channel switch callback */
457 struct ieee80211_channel_switch ch_switch;
458 memset(&ch_switch, 0, sizeof(ch_switch));
459 ch_switch.timestamp = timestamp;
460 if (sw_elem->mode) {
461 ch_switch.block_tx = true;
462 ieee80211_stop_queues_by_reason(&sdata->local->hw,
463 IEEE80211_QUEUE_STOP_REASON_CSA);
464 }
465 ch_switch.channel = new_ch;
466 ch_switch.count = sw_elem->count;
467 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
468 drv_channel_switch(sdata->local, &ch_switch);
469 return;
470 }
471
472 /* channel switch handled in software */
cc32abd4 473 if (sw_elem->count <= 1) {
42935eca 474 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 475 } else {
9feaddc7
WYG		 476 if (sw_elem->mode)
477 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 478 IEEE80211_QUEUE_STOP_REASON_CSA);
479 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
480 mod_timer(&ifmgd->chswitch_timer,
481 jiffies +
482 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 483 cbss->beacon_interval));
cc32abd4
JB		 484 }
485}
486
487static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
488 u16 capab_info, u8 *pwr_constr_elem,
489 u8 pwr_constr_elem_len)
490{
491 struct ieee80211_conf *conf = &sdata->local->hw.conf;
492
493 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
494 return;
495
496 /* Power constraint IE length should be 1 octet */
497 if (pwr_constr_elem_len != 1)
498 return;
499
500 if ((*pwr_constr_elem <= conf->channel->max_power) &&
501 (*pwr_constr_elem != sdata->local->power_constr_level)) {
502 sdata->local->power_constr_level = *pwr_constr_elem;
503 ieee80211_hw_config(sdata->local, 0);
504 }
505}
506
f90754c1
JO		 507void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
508{
509 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
510 struct ieee80211_local *local = sdata->local;
511 struct ieee80211_conf *conf = &local->hw.conf;
512
513 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
514 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
515 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
516
517 local->disable_dynamic_ps = false;
518 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
519}
520EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
521
522void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
523{
524 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
525 struct ieee80211_local *local = sdata->local;
526 struct ieee80211_conf *conf = &local->hw.conf;
527
528 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
529 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
530 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
531
532 local->disable_dynamic_ps = true;
533 conf->dynamic_ps_timeout = 0;
534 del_timer_sync(&local->dynamic_ps_timer);
535 ieee80211_queue_work(&local->hw,
536 &local->dynamic_ps_enable_work);
537}
538EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
539
965bedad
JB		 540/* powersave */
541static void ieee80211_enable_ps(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata)
543{
544 struct ieee80211_conf *conf = &local->hw.conf;
545
d5edaedc
JB		 546 /*
547 * If we are scanning right now then the parameters will
548 * take effect when scan finishes.
549 */
fbe9c429 550 if (local->scanning)
d5edaedc
JB		 551 return;
552
965bedad
JB		 553 if (conf->dynamic_ps_timeout > 0 &&
554 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
555 mod_timer(&local->dynamic_ps_timer, jiffies +
556 msecs_to_jiffies(conf->dynamic_ps_timeout));
557 } else {
558 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
559 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 560
2a13052f
JO		 561 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
562 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
563 return;
564
565 conf->flags |= IEEE80211_CONF_PS;
566 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 567 }
568}
569
570static void ieee80211_change_ps(struct ieee80211_local *local)
571{
572 struct ieee80211_conf *conf = &local->hw.conf;
573
574 if (local->ps_sdata) {
965bedad
JB		 575 ieee80211_enable_ps(local, local->ps_sdata);
576 } else if (conf->flags & IEEE80211_CONF_PS) {
577 conf->flags &= ~IEEE80211_CONF_PS;
578 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
579 del_timer_sync(&local->dynamic_ps_timer);
580 cancel_work_sync(&local->dynamic_ps_enable_work);
581 }
582}
583
584/* need to hold RTNL or interface lock */
10f644a4 585void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 586{
587 struct ieee80211_sub_if_data *sdata, *found = NULL;
588 int count = 0;
195e294d 589 int timeout;
965bedad
JB		 590
591 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
592 local->ps_sdata = NULL;
593 return;
594 }
595
af6b6374
JB		 596 if (!list_empty(&local->work_list)) {
597 local->ps_sdata = NULL;
598 goto change;
599 }
600
965bedad 601 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 602 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 603 continue;
604 if (sdata->vif.type != NL80211_IFTYPE_STATION)
605 continue;
606 found = sdata;
607 count++;
608 }
609
43f78531 610 if (count == 1 && found->u.mgd.powersave &&
af6b6374 611 found->u.mgd.associated &&
56007a02 612 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 613 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
614 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 615 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 616 s32 beaconint_us;
617
618 if (latency < 0)
ed77134b 619 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 620
621 beaconint_us = ieee80211_tu_to_usec(
622 found->vif.bss_conf.beacon_int);
623
ff616381 624 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 625 if (timeout < 0) {
626 /*
ff616381
JO		 627 * Go to full PSM if the user configures a very low
628 * latency requirement.
0ab82b04
EP		 629 * The 2000 second value is there for compatibility
630 * until the PM_QOS_NETWORK_LATENCY is configured
631 * with real values.
195e294d 632 */
0ab82b04
EP		 633 if (latency > (1900 * USEC_PER_MSEC) &&
634 latency != (2000 * USEC_PER_SEC))
195e294d 635 timeout = 0;
ff616381
JO		 636 else
637 timeout = 100;
195e294d 638 }
f90754c1
JO		 639 local->dynamic_ps_user_timeout = timeout;
640 if (!local->disable_dynamic_ps)
641 conf->dynamic_ps_timeout =
642 local->dynamic_ps_user_timeout;
195e294d 643
04fe2037 644 if (beaconint_us > latency) {
10f644a4 645 local->ps_sdata = NULL;
04fe2037 646 } else {
56007a02 647 struct ieee80211_bss *bss;
04fe2037 648 int maxslp = 1;
56007a02 649 u8 dtimper;
04fe2037 650
56007a02
JB		 651 bss = (void *)found->u.mgd.associated->priv;
652 dtimper = bss->dtim_period;
653
654 /* If the TIM IE is invalid, pretend the value is 1 */
655 if (!dtimper)
656 dtimper = 1;
657 else if (dtimper > 1)
04fe2037
JB		 658 maxslp = min_t(int, dtimper,
659 latency / beaconint_us);
660
9ccebe61 661 local->hw.conf.max_sleep_period = maxslp;
56007a02 662 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 663 local->ps_sdata = found;
04fe2037 664 }
10f644a4 665 } else {
965bedad 666 local->ps_sdata = NULL;
10f644a4 667 }
965bedad 668
af6b6374 669 change:
965bedad
JB		 670 ieee80211_change_ps(local);
671}
672
673void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
674{
675 struct ieee80211_local *local =
676 container_of(work, struct ieee80211_local,
677 dynamic_ps_disable_work);
678
679 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
680 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
681 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
682 }
683
684 ieee80211_wake_queues_by_reason(&local->hw,
685 IEEE80211_QUEUE_STOP_REASON_PS);
686}
687
688void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
689{
690 struct ieee80211_local *local =
691 container_of(work, struct ieee80211_local,
692 dynamic_ps_enable_work);
693 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 695
696 /* can only happen when PS was just disabled anyway */
697 if (!sdata)
698 return;
699
700 if (local->hw.conf.flags & IEEE80211_CONF_PS)
701 return;
702
375177bf
VN		 703 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
704 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 705 ieee80211_send_nullfunc(local, sdata, 1);
706
2a13052f
JO		 707 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
708 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 709 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
710 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
711 local->hw.conf.flags |= IEEE80211_CONF_PS;
712 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
713 }
965bedad
JB		 714}
715
716void ieee80211_dynamic_ps_timer(unsigned long data)
717{
718 struct ieee80211_local *local = (void *) data;
719
78f1a8b7 720 if (local->quiescing || local->suspended)
5bb644a0
JB		 721 return;
722
42935eca 723 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 724}
725
60f8b39c 726/* MLME */
f698d856 727static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 728 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 729 u8 *wmm_param, size_t wmm_param_len)
730{
f0706e82 731 struct ieee80211_tx_queue_params params;
4ced3f74 732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 733 size_t left;
734 int count;
ab13315a 735 u8 *pos, uapsd_queues = 0;
f0706e82 736
e1b3ec1a
SG		 737 if (!local->ops->conf_tx)
738 return;
739
af6b6374 740 if (local->hw.queues < 4)
3434fbd3
JB		 741 return;
742
743 if (!wmm_param)
744 return;
745
f0706e82
JB		 746 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
747 return;
ab13315a
KV		 748
749 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 750 uapsd_queues = local->uapsd_queues;
ab13315a 751
f0706e82 752 count = wmm_param[6] & 0x0f;
46900298 753 if (count == ifmgd->wmm_last_param_set)
f0706e82 754 return;
46900298 755 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 756
757 pos = wmm_param + 8;
758 left = wmm_param_len - 8;
759
760 memset(&params, 0, sizeof(params));
761
f0706e82
JB		 762 local->wmm_acm = 0;
763 for (; left >= 4; left -= 4, pos += 4) {
764 int aci = (pos[0] >> 5) & 0x03;
765 int acm = (pos[0] >> 4) & 0x01;
ab13315a 766 bool uapsd = false;
f0706e82
JB		 767 int queue;
768
769 switch (aci) {
0eeb59fe 770 case 1: /* AC_BK */
e100bb64 771 queue = 3;
988c0f72 772 if (acm)
0eeb59fe 773 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 774 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
775 uapsd = true;
f0706e82 776 break;
0eeb59fe 777 case 2: /* AC_VI */
e100bb64 778 queue = 1;
988c0f72 779 if (acm)
0eeb59fe 780 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 781 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
782 uapsd = true;
f0706e82 783 break;
0eeb59fe 784 case 3: /* AC_VO */
e100bb64 785 queue = 0;
988c0f72 786 if (acm)
0eeb59fe 787 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
789 uapsd = true;
f0706e82 790 break;
0eeb59fe 791 case 0: /* AC_BE */
f0706e82 792 default:
e100bb64 793 queue = 2;
988c0f72 794 if (acm)
0eeb59fe 795 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 796 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
797 uapsd = true;
f0706e82
JB		 798 break;
799 }
800
801 params.aifs = pos[0] & 0x0f;
802 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
803 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 804 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 805 params.uapsd = uapsd;
806
f4ea83dd 807#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 808 wiphy_debug(local->hw.wiphy,
809 "WMM queue=%d aci=%d acm=%d aifs=%d "
810 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
811 queue, aci, acm,
812 params.aifs, params.cw_min, params.cw_max,
813 params.txop, params.uapsd);
3330d7be 814#endif
e1b3ec1a 815 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 816 wiphy_debug(local->hw.wiphy,
817 "failed to set TX queue parameters for queue %d\n",
818 queue);
f0706e82 819 }
e1b3ec1a
SG		 820
821 /* enable WMM or activate new settings */
4ced3f74
JB		 822 sdata->vif.bss_conf.qos = true;
823 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 824}
825
7a5158ef
JB		 826static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
827 u16 capab, bool erp_valid, u8 erp)
5628221c 828{
bda3933a 829 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 830 u32 changed = 0;
7a5158ef
JB		 831 bool use_protection;
832 bool use_short_preamble;
833 bool use_short_slot;
834
835 if (erp_valid) {
836 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
837 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
838 } else {
839 use_protection = false;
840 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
841 }
842
843 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 844 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
845 use_short_slot = true;
5628221c 846
471b3efd 847 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 848 bss_conf->use_cts_prot = use_protection;
849 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 850 }
7e9ed188 851
d43c7b37 852 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 853 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 854 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 855 }
d9430a32 856
7a5158ef 857 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 858 bss_conf->use_short_slot = use_short_slot;
859 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 860 }
861
862 return changed;
863}
864
f698d856 865static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 866 struct cfg80211_bss *cbss,
ae5eb026 867 u32 bss_info_changed)
f0706e82 868{
0c1ad2ca 869 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 870 struct ieee80211_local *local = sdata->local;
68542962 871 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 872
ae5eb026 873 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 874 /* set timing information */
68542962
JO		 875 bss_conf->beacon_int = cbss->beacon_interval;
876 bss_conf->timestamp = cbss->tsf;
5628221c 877
77fdaa12
JB		 878 bss_info_changed |= BSS_CHANGED_BEACON_INT;
879 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 880 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 881
7ccc8bd7
FF		 882 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
883 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
884
0c1ad2ca
JB		 885 sdata->u.mgd.associated = cbss;
886 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 887
17e4ec14
JM		 888 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
889
b291ba11
JB		 890 /* just to be sure */
891 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
892 IEEE80211_STA_BEACON_POLL);
893
9ac19a90 894 ieee80211_led_assoc(local, 1);
9306102e 895
e5b900d2
JB		 896 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
897 bss_conf->dtim_period = bss->dtim_period;
898 else
899 bss_conf->dtim_period = 0;
900
68542962 901 bss_conf->assoc = 1;
96dd22ac
JB		 902 /*
903 * For now just always ask the driver to update the basic rateset
904 * when we have associated, we aren't checking whether it actually
905 * changed or not.
906 */
ae5eb026 907 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 908
909 /* And the BSSID changed - we're associated now */
910 bss_info_changed |= BSS_CHANGED_BSSID;
911
a97c13c3
JO		 912 /* Tell the driver to monitor connection quality (if supported) */
913 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 914 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 915 bss_info_changed |= BSS_CHANGED_CQM;
916
68542962
JO		 917 /* Enable ARP filtering */
918 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
919 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
920 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
921 }
922
ae5eb026 923 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 924
056508dc
JB		 925 mutex_lock(&local->iflist_mtx);
926 ieee80211_recalc_ps(local, -1);
025e6be2 927 ieee80211_recalc_smps(local);
056508dc 928 mutex_unlock(&local->iflist_mtx);
e0cb686f 929
8a5b33f5 930 netif_tx_start_all_queues(sdata->dev);
9ac19a90 931 netif_carrier_on(sdata->dev);
f0706e82
JB		 932}
933
e69e95db 934static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 935 bool remove_sta, bool tx)
aa458d17 936{
46900298 937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 938 struct ieee80211_local *local = sdata->local;
939 struct sta_info *sta;
e0cb686f 940 u32 changed = 0, config_changed = 0;
b291ba11 941 u8 bssid[ETH_ALEN];
aa458d17 942
77fdaa12
JB		 943 ASSERT_MGD_MTX(ifmgd);
944
b291ba11
JB		 945 if (WARN_ON(!ifmgd->associated))
946 return;
947
0c1ad2ca 948 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 949
77fdaa12
JB		 950 ifmgd->associated = NULL;
951 memset(ifmgd->bssid, 0, ETH_ALEN);
952
953 /*
954 * we need to commit the associated = NULL change because the
955 * scan code uses that to determine whether this iface should
956 * go to/wake up from powersave or not -- and could otherwise
957 * wake the queues erroneously.
958 */
959 smp_mb();
960
961 /*
962 * Thus, we can only afterwards stop the queues -- to account
963 * for the case where another CPU is finishing a scan at this
964 * time -- we don't want the scan code to enable queues.
965 */
aa458d17 966
8a5b33f5 967 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 968 netif_carrier_off(sdata->dev);
969
2a419056 970 mutex_lock(&local->sta_mtx);
abe60632 971 sta = sta_info_get(sdata, bssid);
4cad6c7c 972 if (sta) {
2a419056 973 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 974 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 975 }
2a419056 976 mutex_unlock(&local->sta_mtx);
aa458d17 977
f5e5bf25
TW		 978 changed |= ieee80211_reset_erp_info(sdata);
979
f5e5bf25 980 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 981 changed |= BSS_CHANGED_ASSOC;
982 sdata->vif.bss_conf.assoc = false;
f5e5bf25 983
aa837e1d
JB		 984 ieee80211_set_wmm_default(sdata);
985
4797938c 986 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 987 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 988
413ad50a
JB		 989 /* on the next assoc, re-program HT parameters */
990 sdata->ht_opmode_valid = false;
991
a8302de9
VT		 992 local->power_constr_level = 0;
993
520eb820
KV		 994 del_timer_sync(&local->dynamic_ps_timer);
995 cancel_work_sync(&local->dynamic_ps_enable_work);
996
e0cb686f
KV		 997 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
998 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
999 config_changed |= IEEE80211_CONF_CHANGE_PS;
1000 }
ae5eb026 1001
e0cb686f 1002 ieee80211_hw_config(local, config_changed);
9cef8737 1003
68542962
JO		 1004 /* Disable ARP filtering */
1005 if (sdata->vif.bss_conf.arp_filter_enabled) {
1006 sdata->vif.bss_conf.arp_filter_enabled = false;
1007 changed |= BSS_CHANGED_ARP_FILTER;
1008 }
1009
0aaffa9b
JB		 1010 /* The BSSID (not really interesting) and HT changed */
1011 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1012 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1013
e69e95db
JM		 1014 if (remove_sta)
1015 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1016
1017 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1018 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1019 del_timer_sync(&sdata->u.mgd.timer);
1020 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1021}
f0706e82 1022
3cf335d5
KV		 1023void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1024 struct ieee80211_hdr *hdr)
1025{
1026 /*
1027 * We can postpone the mgd.timer whenever receiving unicast frames
1028 * from AP because we know that the connection is working both ways
1029 * at that time. But multicast frames (and hence also beacons) must
1030 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1031 * data idle periods for sending the periodic probe request to the
1032 * AP we're connected to.
3cf335d5 1033 */
b291ba11
JB		 1034 if (is_multicast_ether_addr(hdr->addr1))
1035 return;
1036
be099e82 1037 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1038}
f0706e82 1039
4e5ff376
FF		 1040static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1041{
1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1043
1044 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1045 IEEE80211_STA_CONNECTION_POLL)))
1046 return;
1047
1048 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1049 IEEE80211_STA_BEACON_POLL);
1050 mutex_lock(&sdata->local->iflist_mtx);
1051 ieee80211_recalc_ps(sdata->local, -1);
1052 mutex_unlock(&sdata->local->iflist_mtx);
1053
1054 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1055 return;
1056
1057 /*
1058 * We've received a probe response, but are not sure whether
1059 * we have or will be receiving any beacons or data, so let's
1060 * schedule the timers again, just in case.
1061 */
1062 ieee80211_sta_reset_beacon_monitor(sdata);
1063
1064 mod_timer(&ifmgd->conn_mon_timer,
1065 round_jiffies_up(jiffies +
1066 IEEE80211_CONNECTION_IDLE_TIME));
1067}
1068
1069void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1070 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1071{
75706d0e 1072 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1073 return;
1074
04ac3c0e
FF		 1075 if (ack)
1076 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1077
1078 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1079 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1080 if (ack)
1081 sdata->u.mgd.probe_send_count = 0;
1082 else
1083 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1084 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1085 }
1086}
1087
a43abf29
ML		 1088static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1089{
1090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1091 const u8 *ssid;
f01a067d
LR		 1092 u8 *dst = ifmgd->associated->bssid;
1093 u8 unicast_limit = max(1, IEEE80211_MAX_PROBE_TRIES - 3);
1094
1095 /*
1096 * Try sending broadcast probe requests for the last three
1097 * probe requests after the first ones failed since some
1098 * buggy APs only support broadcast probe requests.
1099 */
1100 if (ifmgd->probe_send_count >= unicast_limit)
1101 dst = NULL;
a43abf29 1102
4e5ff376
FF		 1103 /*
1104 * When the hardware reports an accurate Tx ACK status, it's
1105 * better to send a nullfunc frame instead of a probe request,
1106 * as it will kick us off the AP quickly if we aren't associated
1107 * anymore. The timeout will be reset if the frame is ACKed by
1108 * the AP.
1109 */
04ac3c0e
FF		 1110 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1111 ifmgd->nullfunc_failed = false;
4e5ff376 1112 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1113 } else {
4e5ff376
FF		 1114 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1115 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
1116 }
a43abf29
ML		 1117
1118 ifmgd->probe_send_count++;
1119 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1120 run_again(ifmgd, ifmgd->probe_timeout);
1121}
1122
b291ba11
JB		 1123static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1124 bool beacon)
04de8381 1125{
04de8381 1126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1127 bool already = false;
34bfc411 1128
9607e6b6 1129 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1130 return;
1131
91a3bd76
LR		 1132 if (sdata->local->scanning)
1133 return;
1134
b8bc4b0a
JB		 1135 if (sdata->local->tmp_channel)
1136 return;
1137
77fdaa12
JB		 1138 mutex_lock(&ifmgd->mtx);
1139
1140 if (!ifmgd->associated)
1141 goto out;
1142
a860402d 1143#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1144 if (beacon && net_ratelimit())
1145 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1146 "- sending probe request\n", sdata->name);
a860402d 1147#endif
04de8381 1148
b291ba11
JB		 1149 /*
1150 * The driver/our work has already reported this event or the
1151 * connection monitoring has kicked in and we have already sent
1152 * a probe request. Or maybe the AP died and the driver keeps
1153 * reporting until we disassociate...
1154 *
1155 * In either case we have to ignore the current call to this
1156 * function (except for setting the correct probe reason bit)
1157 * because otherwise we would reset the timer every time and
1158 * never check whether we received a probe response!
1159 */
1160 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1161 IEEE80211_STA_CONNECTION_POLL))
1162 already = true;
1163
1164 if (beacon)
1165 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1166 else
1167 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1168
1169 if (already)
1170 goto out;
1171
4e751843
JB		 1172 mutex_lock(&sdata->local->iflist_mtx);
1173 ieee80211_recalc_ps(sdata->local, -1);
1174 mutex_unlock(&sdata->local->iflist_mtx);
1175
a43abf29
ML		 1176 ifmgd->probe_send_count = 0;
1177 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1178 out:
1179 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1180}
1181
a619a4c0
JO		 1182struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1183 struct ieee80211_vif *vif)
1184{
1185 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1187 struct sk_buff *skb;
1188 const u8 *ssid;
1189
1190 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1191 return NULL;
1192
1193 ASSERT_MGD_MTX(ifmgd);
1194
1195 if (!ifmgd->associated)
1196 return NULL;
1197
1198 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1199 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1200 ssid + 2, ssid[1], NULL, 0);
1201
1202 return skb;
1203}
1204EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1205
1e4dcd01
JO		 1206static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1207{
1208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1209 struct ieee80211_local *local = sdata->local;
1210 u8 bssid[ETH_ALEN];
1211
1212 mutex_lock(&ifmgd->mtx);
1213 if (!ifmgd->associated) {
1214 mutex_unlock(&ifmgd->mtx);
1215 return;
1216 }
1217
1218 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1219
1220 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1221
53f73c09 1222 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1223 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1224
1225 mutex_lock(&local->mtx);
1226 ieee80211_recalc_idle(local);
1227 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1228 /*
1229 * must be outside lock due to cfg80211,
1230 * but that's not a problem.
1231 */
1232 ieee80211_send_deauth_disassoc(sdata, bssid,
1233 IEEE80211_STYPE_DEAUTH,
1234 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1235 NULL, true);
1e4dcd01
JO		 1236}
1237
1238void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1239{
1240 struct ieee80211_sub_if_data *sdata =
1241 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1242 u.mgd.beacon_connection_loss_work);
b291ba11 1243
1e4dcd01
JO		 1244 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1245 __ieee80211_connection_loss(sdata);
1246 else
1247 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1248}
1249
04de8381
KV		 1250void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1251{
1252 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1253 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1254
b5878a2d
JB		 1255 trace_api_beacon_loss(sdata);
1256
1e4dcd01
JO		 1257 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1258 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1259}
1260EXPORT_SYMBOL(ieee80211_beacon_loss);
1261
1e4dcd01
JO		 1262void ieee80211_connection_loss(struct ieee80211_vif *vif)
1263{
1264 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1265 struct ieee80211_hw *hw = &sdata->local->hw;
1266
b5878a2d
JB		 1267 trace_api_connection_loss(sdata);
1268
1e4dcd01
JO		 1269 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1270 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1271}
1272EXPORT_SYMBOL(ieee80211_connection_loss);
1273
1274
77fdaa12
JB		 1275static enum rx_mgmt_action __must_check
1276ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1277 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1278{
46900298 1279 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1280 const u8 *bssid = NULL;
f0706e82
JB		 1281 u16 reason_code;
1282
f4ea83dd 1283 if (len < 24 + 2)
77fdaa12 1284 return RX_MGMT_NONE;
f0706e82 1285
77fdaa12
JB		 1286 ASSERT_MGD_MTX(ifmgd);
1287
0c1ad2ca 1288 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1289
1290 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1291
77fdaa12 1292 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1293 sdata->name, bssid, reason_code);
77fdaa12 1294
53f73c09 1295 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1296 mutex_lock(&sdata->local->mtx);
63f170e0 1297 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1298 mutex_unlock(&sdata->local->mtx);
f0706e82 1299
77fdaa12 1300 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1301}
1302
1303
77fdaa12
JB		 1304static enum rx_mgmt_action __must_check
1305ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1306 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1307{
46900298 1308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1309 u16 reason_code;
1310
f4ea83dd 1311 if (len < 24 + 2)
77fdaa12 1312 return RX_MGMT_NONE;
f0706e82 1313
77fdaa12
JB		 1314 ASSERT_MGD_MTX(ifmgd);
1315
1316 if (WARN_ON(!ifmgd->associated))
1317 return RX_MGMT_NONE;
1318
0c1ad2ca 1319 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1320 return RX_MGMT_NONE;
f0706e82
JB		 1321
1322 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1323
0ff71613 1324 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1325 sdata->name, mgmt->sa, reason_code);
f0706e82 1326
53f73c09 1327 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1328 mutex_lock(&sdata->local->mtx);
bc83b681 1329 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1330 mutex_unlock(&sdata->local->mtx);
77fdaa12 1331 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1332}
1333
1334
af6b6374
JB		 1335static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1336 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1337{
af6b6374 1338 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1340 struct ieee80211_local *local = sdata->local;
8318d78a 1341 struct ieee80211_supported_band *sband;
f0706e82 1342 struct sta_info *sta;
0c1ad2ca 1343 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1344 u8 *pos;
881d948c 1345 u32 rates, basic_rates;
af6b6374 1346 u16 capab_info, aid;
f0706e82 1347 struct ieee802_11_elems elems;
bda3933a 1348 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1349 u32 changed = 0;
5d1ec85f
JB		 1350 int i, j, err;
1351 bool have_higher_than_11mbit = false;
ae5eb026 1352 u16 ap_ht_cap_flags;
f0706e82 1353
af6b6374 1354 /* AssocResp and ReassocResp have identical structure */
f0706e82 1355
f0706e82 1356 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1357 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1358
1dd84aa2
JB		 1359 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1360 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1361 "set\n", sdata->name, aid);
1dd84aa2
JB		 1362 aid &= ~(BIT(15) | BIT(14));
1363
af6b6374
JB		 1364 pos = mgmt->u.assoc_resp.variable;
1365 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1366
f0706e82
JB		 1367 if (!elems.supp_rates) {
1368 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1369 sdata->name);
af6b6374 1370 return false;
f0706e82
JB		 1371 }
1372
46900298 1373 ifmgd->aid = aid;
f0706e82 1374
0c1ad2ca 1375 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1376 if (!sta) {
5d1ec85f
JB		 1377 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1378 " the AP\n", sdata->name);
af6b6374 1379 return false;
77fdaa12 1380 }
05e5e883 1381
5d1ec85f
JB		 1382 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1383 WLAN_STA_ASSOC_AP);
1384 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1385 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1386
60f8b39c
JB		 1387 rates = 0;
1388 basic_rates = 0;
e7480bbb 1389 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1390
60f8b39c
JB		 1391 for (i = 0; i < elems.supp_rates_len; i++) {
1392 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1393 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1394
60f8b39c
JB		 1395 if (rate > 110)
1396 have_higher_than_11mbit = true;
1397
1398 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1399 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1400 rates |= BIT(j);
d61272cb
TW		 1401 if (is_basic)
1402 basic_rates |= BIT(j);
1403 break;
1404 }
f709fc69 1405 }
f709fc69
LCC		 1406 }
1407
60f8b39c
JB		 1408 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1409 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1410 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1411
60f8b39c
JB		 1412 if (rate > 110)
1413 have_higher_than_11mbit = true;
f0706e82 1414
60f8b39c 1415 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1416 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1417 rates |= BIT(j);
d61272cb
TW		 1418 if (is_basic)
1419 basic_rates |= BIT(j);
1420 break;
1421 }
60f8b39c 1422 }
1ebebea8 1423 }
f0706e82 1424
e7480bbb 1425 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1426 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1427
1428 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1429 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1430 have_higher_than_11mbit)
1431 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1432 else
1433 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1434
ab1faead 1435 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1436 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1437 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1438
1439 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1440
4b7679a5 1441 rate_control_rate_init(sta);
f0706e82 1442
46900298 1443 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1444 set_sta_flags(sta, WLAN_STA_MFP);
1445
ddf4ac53 1446 if (elems.wmm_param)
60f8b39c 1447 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1448
5d1ec85f
JB		 1449 err = sta_info_insert(sta);
1450 sta = NULL;
1451 if (err) {
1452 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1453 " the AP (error %d)\n", sdata->name, err);
90be561b 1454 return false;
ddf4ac53
JB		 1455 }
1456
f2176d72
JO		 1457 /*
1458 * Always handle WMM once after association regardless
1459 * of the first value the AP uses. Setting -1 here has
1460 * that effect because the AP values is an unsigned
1461 * 4-bit value.
1462 */
1463 ifmgd->wmm_last_param_set = -1;
1464
ddf4ac53 1465 if (elems.wmm_param)
4ced3f74 1466 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1467 elems.wmm_param_len);
aa837e1d
JB		 1468 else
1469 ieee80211_set_wmm_default(sdata);
f0706e82 1470
e4da8c37
JB		 1471 local->oper_channel = wk->chan;
1472
ae5eb026 1473 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1474 (sdata->local->hw.queues >= 4) &&
ab1faead 1475 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1476 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1477 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1478
60f8b39c
JB		 1479 /* set AID and assoc capability,
1480 * ieee80211_set_associated() will tell the driver */
1481 bss_conf->aid = aid;
1482 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1483 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1484
d524215f
FF		 1485 /*
1486 * If we're using 4-addr mode, let the AP know that we're
1487 * doing so, so that it can create the STA VLAN on its side
1488 */
1489 if (ifmgd->use_4addr)
1490 ieee80211_send_4addr_nullfunc(local, sdata);
1491
15b7b062 1492 /*
b291ba11
JB		 1493 * Start timer to probe the connection to the AP now.
1494 * Also start the timer that will detect beacon loss.
15b7b062 1495 */
b291ba11 1496 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1497 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1498
af6b6374 1499 return true;
f0706e82
JB		 1500}
1501
1502
98c8fccf
JB		 1503static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1504 struct ieee80211_mgmt *mgmt,
1505 size_t len,
1506 struct ieee80211_rx_status *rx_status,
1507 struct ieee802_11_elems *elems,
1508 bool beacon)
1509{
1510 struct ieee80211_local *local = sdata->local;
1511 int freq;
c2b13452 1512 struct ieee80211_bss *bss;
98c8fccf 1513 struct ieee80211_channel *channel;
56007a02
JB		 1514 bool need_ps = false;
1515
1516 if (sdata->u.mgd.associated) {
1517 bss = (void *)sdata->u.mgd.associated->priv;
1518 /* not previously set so we may need to recalc */
1519 need_ps = !bss->dtim_period;
1520 }
98c8fccf
JB		 1521
1522 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1523 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1524 rx_status->band);
98c8fccf
JB		 1525 else
1526 freq = rx_status->freq;
1527
1528 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1529
1530 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1531 return;
1532
98c8fccf 1533 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1534 channel, beacon);
77fdaa12
JB		 1535 if (bss)
1536 ieee80211_rx_bss_put(local, bss);
1537
1538 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1539 return;
1540
56007a02
JB		 1541 if (need_ps) {
1542 mutex_lock(&local->iflist_mtx);
1543 ieee80211_recalc_ps(local, -1);
1544 mutex_unlock(&local->iflist_mtx);
1545 }
1546
c481ec97 1547 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1548 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1549 ETH_ALEN) == 0)) {
c481ec97
S		 1550 struct ieee80211_channel_sw_ie *sw_elem =
1551 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1552 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1553 bss, rx_status->mactime);
c481ec97 1554 }
f0706e82
JB		 1555}
1556
1557
f698d856 1558static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1559 struct sk_buff *skb)
f0706e82 1560{
af6b6374 1561 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1562 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1563 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1564 size_t baselen, len = skb->len;
ae6a44e3
EK		 1565 struct ieee802_11_elems elems;
1566
15b7b062
KV		 1567 ifmgd = &sdata->u.mgd;
1568
77fdaa12
JB		 1569 ASSERT_MGD_MTX(ifmgd);
1570
47846c9b 1571 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1572 return; /* ignore ProbeResp to foreign address */
1573
ae6a44e3
EK		 1574 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1575 if (baselen > len)
1576 return;
1577
1578 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1579 &elems);
1580
98c8fccf 1581 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1582
77fdaa12 1583 if (ifmgd->associated &&
4e5ff376
FF		 1584 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1585 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1586}
1587
d91f36db
JB		 1588/*
1589 * This is the canonical list of information elements we care about,
1590 * the filter code also gives us all changes to the Microsoft OUI
1591 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1592 *
1593 * We implement beacon filtering in software since that means we can
1594 * avoid processing the frame here and in cfg80211, and userspace
1595 * will not be able to tell whether the hardware supports it or not.
1596 *
1597 * XXX: This list needs to be dynamic -- userspace needs to be able to
1598 * add items it requires. It also needs to be able to tell us to
1599 * look out for other vendor IEs.
1600 */
1601static const u64 care_about_ies =
1d4df3a5
JB		 1602 (1ULL << WLAN_EID_COUNTRY) |
1603 (1ULL << WLAN_EID_ERP_INFO) |
1604 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1605 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1606 (1ULL << WLAN_EID_HT_CAPABILITY) |
1607 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1608
f698d856 1609static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1610 struct ieee80211_mgmt *mgmt,
1611 size_t len,
1612 struct ieee80211_rx_status *rx_status)
1613{
d91f36db 1614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1615 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1616 size_t baselen;
1617 struct ieee802_11_elems elems;
f698d856 1618 struct ieee80211_local *local = sdata->local;
471b3efd 1619 u32 changed = 0;
d91f36db 1620 bool erp_valid, directed_tim = false;
7a5158ef 1621 u8 erp_value = 0;
d91f36db 1622 u32 ncrc;
77fdaa12
JB		 1623 u8 *bssid;
1624
1625 ASSERT_MGD_MTX(ifmgd);
f0706e82 1626
ae6a44e3
EK		 1627 /* Process beacon from the current BSS */
1628 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1629 if (baselen > len)
1630 return;
1631
d91f36db 1632 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1633 return;
f0706e82 1634
b291ba11
JB		 1635 /*
1636 * We might have received a number of frames, among them a
1637 * disassoc frame and a beacon...
1638 */
1639 if (!ifmgd->associated)
77fdaa12
JB		 1640 return;
1641
0c1ad2ca 1642 bssid = ifmgd->associated->bssid;
77fdaa12 1643
b291ba11
JB		 1644 /*
1645 * And in theory even frames from a different AP we were just
1646 * associated to a split-second ago!
1647 */
1648 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1649 return;
1650
17e4ec14
JM		 1651 /* Track average RSSI from the Beacon frames of the current AP */
1652 ifmgd->last_beacon_signal = rx_status->signal;
1653 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1654 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1655 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1656 ifmgd->last_cqm_event_signal = 0;
391a200a 1657 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1658 } else {
1659 ifmgd->ave_beacon_signal =
1660 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1661 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1662 ifmgd->ave_beacon_signal) / 16;
391a200a 1663 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1664 }
1665 if (bss_conf->cqm_rssi_thold &&
391a200a 1666 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1667 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1668 int sig = ifmgd->ave_beacon_signal / 16;
1669 int last_event = ifmgd->last_cqm_event_signal;
1670 int thold = bss_conf->cqm_rssi_thold;
1671 int hyst = bss_conf->cqm_rssi_hyst;
1672 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_LOW,
1678 GFP_KERNEL);
1679 } else if (sig > thold &&
1680 (last_event == 0 || sig > last_event + hyst)) {
1681 ifmgd->last_cqm_event_signal = sig;
1682 ieee80211_cqm_rssi_notify(
1683 &sdata->vif,
1684 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1685 GFP_KERNEL);
1686 }
1687 }
1688
b291ba11 1689 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1690#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1691 if (net_ratelimit()) {
1692 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1693 "to a received beacon\n", sdata->name);
92778180
JM		 1694 }
1695#endif
b291ba11 1696 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1697 mutex_lock(&local->iflist_mtx);
1698 ieee80211_recalc_ps(local, -1);
1699 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1700 }
1701
b291ba11
JB		 1702 /*
1703 * Push the beacon loss detection into the future since
1704 * we are processing a beacon from the AP just now.
1705 */
d3a910a8 1706 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1707
d91f36db
JB		 1708 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1709 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1710 len - baselen, &elems,
1711 care_about_ies, ncrc);
1712
1713 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1714 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1715 ifmgd->aid);
d91f36db 1716
d8ec4433 1717 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1718 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1719 true);
d91f36db 1720
4ced3f74 1721 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1722 elems.wmm_param_len);
1723 }
fe3fa827 1724
25c9c875 1725 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1726 if (directed_tim) {
572e0012
KV		 1727 if (local->hw.conf.dynamic_ps_timeout > 0) {
1728 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1729 ieee80211_hw_config(local,
1730 IEEE80211_CONF_CHANGE_PS);
1731 ieee80211_send_nullfunc(local, sdata, 0);
1732 } else {
1733 local->pspolling = true;
1734
1735 /*
1736 * Here is assumed that the driver will be
1737 * able to send ps-poll frame and receive a
1738 * response even though power save mode is
1739 * enabled, but some drivers might require
1740 * to disable power save here. This needs
1741 * to be investigated.
1742 */
1743 ieee80211_send_pspoll(local, sdata);
1744 }
a97b77b9
VN		 1745 }
1746 }
7a5158ef 1747
d8ec4433 1748 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1749 return;
1750 ifmgd->beacon_crc = ncrc;
d8ec4433 1751 ifmgd->beacon_crc_valid = true;
30196673 1752
7a5158ef
JB		 1753 if (elems.erp_info && elems.erp_info_len >= 1) {
1754 erp_valid = true;
1755 erp_value = elems.erp_info[0];
1756 } else {
1757 erp_valid = false;
50c4afb9 1758 }
7a5158ef
JB		 1759 changed |= ieee80211_handle_bss_capability(sdata,
1760 le16_to_cpu(mgmt->u.beacon.capab_info),
1761 erp_valid, erp_value);
f0706e82 1762
d3c990fb 1763
53d6f81c 1764 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1765 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1766 struct sta_info *sta;
1767 struct ieee80211_supported_band *sband;
1768 u16 ap_ht_cap_flags;
1769
1770 rcu_read_lock();
1771
abe60632 1772 sta = sta_info_get(sdata, bssid);
77fdaa12 1773 if (WARN_ON(!sta)) {
ae5eb026
JB		 1774 rcu_read_unlock();
1775 return;
1776 }
1777
1778 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1779
1780 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1781 elems.ht_cap_elem, &sta->sta.ht_cap);
1782
1783 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1784
1785 rcu_read_unlock();
1786
1787 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1788 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1789 }
1790
8b19e6ca 1791 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1792 if (elems.country_elem) {
a8302de9
VT		 1793 /* TODO: IBSS also needs this */
1794 if (elems.pwr_constr_elem)
1795 ieee80211_handle_pwr_constr(sdata,
1796 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1797 elems.pwr_constr_elem,
1798 elems.pwr_constr_elem_len);
3f2355cb
LR		 1799 }
1800
471b3efd 1801 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1802}
1803
1fa57d01
JB		 1804void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1805 struct sk_buff *skb)
f0706e82 1806{
77fdaa12 1807 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1808 struct ieee80211_rx_status *rx_status;
f0706e82 1809 struct ieee80211_mgmt *mgmt;
77fdaa12 1810 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1811 u16 fc;
1812
f0706e82
JB		 1813 rx_status = (struct ieee80211_rx_status *) skb->cb;
1814 mgmt = (struct ieee80211_mgmt *) skb->data;
1815 fc = le16_to_cpu(mgmt->frame_control);
1816
77fdaa12
JB		 1817 mutex_lock(&ifmgd->mtx);
1818
1819 if (ifmgd->associated &&
0c1ad2ca 1820 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1821 switch (fc & IEEE80211_FCTL_STYPE) {
1822 case IEEE80211_STYPE_BEACON:
1823 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1824 rx_status);
1825 break;
1826 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1827 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1828 break;
1829 case IEEE80211_STYPE_DEAUTH:
63f170e0 1830 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1831 break;
1832 case IEEE80211_STYPE_DISASSOC:
1833 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1834 break;
1835 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1836 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1837 case WLAN_CATEGORY_SPECTRUM_MGMT:
1838 ieee80211_sta_process_chanswitch(sdata,
1839 &mgmt->u.action.u.chan_switch.sw_elem,
1840 (void *)ifmgd->associated->priv,
1841 rx_status->mactime);
1842 break;
1843 }
77fdaa12
JB		 1844 }
1845 mutex_unlock(&ifmgd->mtx);
1846
1847 switch (rma) {
1848 case RX_MGMT_NONE:
1849 /* no action */
1850 break;
1851 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1852 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1853 break;
1854 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1855 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1856 break;
1857 default:
1858 WARN(1, "unexpected: %d", rma);
1859 }
36b3a628 1860 return;
77fdaa12
JB		 1861 }
1862
77fdaa12
JB		 1863 mutex_unlock(&ifmgd->mtx);
1864
63f170e0 1865 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1866 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1867 struct ieee80211_local *local = sdata->local;
1868 struct ieee80211_work *wk;
1869
a1699b75 1870 mutex_lock(&local->mtx);
b054b747
JB		 1871 list_for_each_entry(wk, &local->work_list, list) {
1872 if (wk->sdata != sdata)
1873 continue;
1874
e5b900d2
JB		 1875 if (wk->type != IEEE80211_WORK_ASSOC &&
1876 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1877 continue;
1878
1879 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1880 continue;
1881 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1882 continue;
1883
1884 /*
1885 * Printing the message only here means we can't
1886 * spuriously print it, but it also means that it
1887 * won't be printed when the frame comes in before
1888 * we even tried to associate or in similar cases.
1889 *
1890 * Ultimately, I suspect cfg80211 should print the
1891 * messages instead.
1892 */
1893 printk(KERN_DEBUG
1894 "%s: deauthenticated from %pM (Reason: %u)\n",
1895 sdata->name, mgmt->bssid,
1896 le16_to_cpu(mgmt->u.deauth.reason_code));
1897
1898 list_del_rcu(&wk->list);
1899 free_work(wk);
1900 break;
1901 }
a1699b75 1902 mutex_unlock(&local->mtx);
f0706e82 1903
ce470613 1904 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1905 }
f0706e82
JB		 1906}
1907
9c6bd790 1908static void ieee80211_sta_timer(unsigned long data)
f0706e82 1909{
60f8b39c
JB		 1910 struct ieee80211_sub_if_data *sdata =
1911 (struct ieee80211_sub_if_data *) data;
46900298 1912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1913 struct ieee80211_local *local = sdata->local;
f0706e82 1914
5bb644a0
JB		 1915 if (local->quiescing) {
1916 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1917 return;
1918 }
1919
64592c8f 1920 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1921}
1922
04ac3c0e
FF		 1923static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1924 u8 *bssid)
1925{
1926 struct ieee80211_local *local = sdata->local;
1927 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1928
1929 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1930 IEEE80211_STA_BEACON_POLL);
1931
1932 ieee80211_set_disassoc(sdata, true, true);
1933 mutex_unlock(&ifmgd->mtx);
1934 mutex_lock(&local->mtx);
1935 ieee80211_recalc_idle(local);
1936 mutex_unlock(&local->mtx);
1937 /*
1938 * must be outside lock due to cfg80211,
1939 * but that's not a problem.
1940 */
1941 ieee80211_send_deauth_disassoc(sdata, bssid,
1942 IEEE80211_STYPE_DEAUTH,
1943 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1944 NULL, true);
1945 mutex_lock(&ifmgd->mtx);
1946}
1947
1fa57d01 1948void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1949{
9c6bd790 1950 struct ieee80211_local *local = sdata->local;
1fa57d01 1951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1952
77fdaa12
JB		 1953 /* then process the rest of the work */
1954 mutex_lock(&ifmgd->mtx);
1955
b291ba11
JB		 1956 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1957 IEEE80211_STA_CONNECTION_POLL) &&
1958 ifmgd->associated) {
a43abf29 1959 u8 bssid[ETH_ALEN];
72a8a3ed 1960 int max_tries;
a43abf29 1961
0c1ad2ca 1962 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 1963
72a8a3ed
FF		 1964 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1965 max_tries = IEEE80211_MAX_NULLFUNC_TRIES;
1966 else
1967 max_tries = IEEE80211_MAX_PROBE_TRIES;
1968
4e5ff376
FF		 1969 /* ACK received for nullfunc probing frame */
1970 if (!ifmgd->probe_send_count)
1971 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 1972 else if (ifmgd->nullfunc_failed) {
1973 if (ifmgd->probe_send_count < max_tries) {
1974#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1975 wiphy_debug(local->hw.wiphy,
1976 "%s: No ack for nullfunc frame to"
bfc31df3 1977 " AP %pM, try %d/%i\n",
04ac3c0e 1978 sdata->name, bssid,
bfc31df3 1979 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 1980#endif
1981 ieee80211_mgd_probe_ap_send(sdata);
1982 } else {
1983#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1984 wiphy_debug(local->hw.wiphy,
1985 "%s: No ack for nullfunc frame to"
1986 " AP %pM, disconnecting.\n",
c658e5db 1987 sdata->name, bssid);
04ac3c0e
FF		 1988#endif
1989 ieee80211_sta_connection_lost(sdata, bssid);
1990 }
1991 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 1992 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 1993 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1994#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1995 wiphy_debug(local->hw.wiphy,
1996 "%s: Failed to send nullfunc to AP %pM"
1997 " after %dms, disconnecting.\n",
1998 sdata->name,
1999 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2000#endif
2001 ieee80211_sta_connection_lost(sdata, bssid);
2002 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2003#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2004 wiphy_debug(local->hw.wiphy,
2005 "%s: No probe response from AP %pM"
bfc31df3 2006 " after %dms, try %d/%i\n",
b38afa87
BG		 2007 sdata->name,
2008 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ,
bfc31df3 2009 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2010#endif
2011 ieee80211_mgd_probe_ap_send(sdata);
2012 } else {
b291ba11
JB		 2013 /*
2014 * We actually lost the connection ... or did we?
2015 * Let's make sure!
2016 */
b38afa87
BG		 2017 wiphy_debug(local->hw.wiphy,
2018 "%s: No probe response from AP %pM"
2019 " after %dms, disconnecting.\n",
2020 sdata->name,
2021 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
04ac3c0e
FF		 2022
2023 ieee80211_sta_connection_lost(sdata, bssid);
b291ba11
JB		 2024 }
2025 }
2026
77fdaa12 2027 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2028}
2029
b291ba11
JB		 2030static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2031{
2032 struct ieee80211_sub_if_data *sdata =
2033 (struct ieee80211_sub_if_data *) data;
2034 struct ieee80211_local *local = sdata->local;
2035
2036 if (local->quiescing)
2037 return;
2038
1e4dcd01
JO		 2039 ieee80211_queue_work(&sdata->local->hw,
2040 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2041}
2042
2043static void ieee80211_sta_conn_mon_timer(unsigned long data)
2044{
2045 struct ieee80211_sub_if_data *sdata =
2046 (struct ieee80211_sub_if_data *) data;
2047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2048 struct ieee80211_local *local = sdata->local;
2049
2050 if (local->quiescing)
2051 return;
2052
42935eca 2053 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2054}
2055
2056static void ieee80211_sta_monitor_work(struct work_struct *work)
2057{
2058 struct ieee80211_sub_if_data *sdata =
2059 container_of(work, struct ieee80211_sub_if_data,
2060 u.mgd.monitor_work);
2061
2062 ieee80211_mgd_probe_ap(sdata, false);
2063}
2064
9c6bd790
JB		 2065static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2066{
ad935687 2067 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2068 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2069 IEEE80211_STA_CONNECTION_POLL);
ad935687 2070
b291ba11 2071 /* let's probe the connection once */
42935eca 2072 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2073 &sdata->u.mgd.monitor_work);
2074 /* and do all the other regular work too */
64592c8f 2075 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2076 }
9c6bd790 2077}
f0706e82 2078
5bb644a0
JB		 2079#ifdef CONFIG_PM
2080void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2081{
2082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2083
2084 /*
2085 * we need to use atomic bitops for the running bits
2086 * only because both timers might fire at the same
2087 * time -- the code here is properly synchronised.
2088 */
2089
d1f5b7a3
JB		 2090 cancel_work_sync(&ifmgd->request_smps_work);
2091
1e4dcd01 2092 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2093 if (del_timer_sync(&ifmgd->timer))
2094 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2095
2096 cancel_work_sync(&ifmgd->chswitch_work);
2097 if (del_timer_sync(&ifmgd->chswitch_timer))
2098 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2099
2100 cancel_work_sync(&ifmgd->monitor_work);
2101 /* these will just be re-established on connection */
2102 del_timer_sync(&ifmgd->conn_mon_timer);
2103 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2104}
2105
2106void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2107{
2108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2109
2110 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2111 add_timer(&ifmgd->timer);
2112 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2113 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2114 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2115 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2116}
2117#endif
2118
9c6bd790
JB		 2119/* interface setup */
2120void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2121{
46900298 2122 struct ieee80211_if_managed *ifmgd;
988c0f72 2123
46900298 2124 ifmgd = &sdata->u.mgd;
b291ba11 2125 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2126 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2127 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2128 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2129 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2130 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2131 (unsigned long) sdata);
b291ba11
JB		 2132 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2133 (unsigned long) sdata);
2134 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2135 (unsigned long) sdata);
46900298 2136 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2137 (unsigned long) sdata);
9c6bd790 2138
ab1faead 2139 ifmgd->flags = 0;
bbbdff9e 2140
77fdaa12 2141 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2142
2143 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2144 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2145 else
2146 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2147}
2148
77fdaa12
JB		 2149/* scan finished notification */
2150void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2151{
77fdaa12 2152 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2153
77fdaa12
JB		 2154 /* Restart STA timers */
2155 rcu_read_lock();
2156 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2157 ieee80211_restart_sta_timer(sdata);
2158 rcu_read_unlock();
2159}
60f8b39c 2160
77fdaa12
JB		 2161int ieee80211_max_network_latency(struct notifier_block *nb,
2162 unsigned long data, void *dummy)
2163{
2164 s32 latency_usec = (s32) data;
2165 struct ieee80211_local *local =
2166 container_of(nb, struct ieee80211_local,
2167 network_latency_notifier);
1fa6f4af 2168
77fdaa12
JB		 2169 mutex_lock(&local->iflist_mtx);
2170 ieee80211_recalc_ps(local, latency_usec);
2171 mutex_unlock(&local->iflist_mtx);
dfe67012 2172
77fdaa12 2173 return 0;
9c6bd790
JB		 2174}
2175
77fdaa12 2176/* config hooks */
af6b6374
JB		 2177static enum work_done_result
2178ieee80211_probe_auth_done(struct ieee80211_work *wk,
2179 struct sk_buff *skb)
2180{
2181 if (!skb) {
2182 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2183 return WORK_DONE_DESTROY;
2184 }
2185
2186 if (wk->type == IEEE80211_WORK_AUTH) {
2187 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2188 return WORK_DONE_DESTROY;
2189 }
2190
2191 mutex_lock(&wk->sdata->u.mgd.mtx);
2192 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2193 mutex_unlock(&wk->sdata->u.mgd.mtx);
2194
2195 wk->type = IEEE80211_WORK_AUTH;
2196 wk->probe_auth.tries = 0;
2197 return WORK_DONE_REQUEUE;
2198}
2199
77fdaa12
JB		 2200int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2201 struct cfg80211_auth_request *req)
9c6bd790 2202{
77fdaa12 2203 const u8 *ssid;
f679f65d 2204 struct ieee80211_work *wk;
77fdaa12 2205 u16 auth_alg;
9c6bd790 2206
d5cdfacb
JM		 2207 if (req->local_state_change)
2208 return 0; /* no need to update mac80211 state */
2209
77fdaa12
JB		 2210 switch (req->auth_type) {
2211 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2212 auth_alg = WLAN_AUTH_OPEN;
2213 break;
2214 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2215 if (IS_ERR(sdata->local->wep_tx_tfm))
2216 return -EOPNOTSUPP;
77fdaa12
JB		 2217 auth_alg = WLAN_AUTH_SHARED_KEY;
2218 break;
2219 case NL80211_AUTHTYPE_FT:
2220 auth_alg = WLAN_AUTH_FT;
2221 break;
2222 case NL80211_AUTHTYPE_NETWORK_EAP:
2223 auth_alg = WLAN_AUTH_LEAP;
2224 break;
2225 default:
2226 return -EOPNOTSUPP;
60f8b39c 2227 }
77fdaa12
JB		 2228
2229 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2230 if (!wk)
9c6bd790 2231 return -ENOMEM;
77fdaa12 2232
5e124bd5 2233 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2234
2235 if (req->ie && req->ie_len) {
2236 memcpy(wk->ie, req->ie, req->ie_len);
2237 wk->ie_len = req->ie_len;
9c6bd790 2238 }
77fdaa12 2239
fffd0934 2240 if (req->key && req->key_len) {
af6b6374
JB		 2241 wk->probe_auth.key_len = req->key_len;
2242 wk->probe_auth.key_idx = req->key_idx;
2243 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2244 }
2245
77fdaa12 2246 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2247 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2248 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2249
af6b6374
JB		 2250 wk->probe_auth.algorithm = auth_alg;
2251 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2252
070bb547
JB		 2253 /* if we already have a probe, don't probe again */
2254 if (req->bss->proberesp_ies)
2255 wk->type = IEEE80211_WORK_AUTH;
2256 else
2257 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2258 wk->chan = req->bss->channel;
af6b6374
JB		 2259 wk->sdata = sdata;
2260 wk->done = ieee80211_probe_auth_done;
77fdaa12 2261
af6b6374 2262 ieee80211_add_work(wk);
9c6bd790 2263 return 0;
60f8b39c
JB		 2264}
2265
af6b6374
JB		 2266static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2267 struct sk_buff *skb)
2268{
2269 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2270 struct ieee80211_rx_status *rx_status;
2271 struct ieee802_11_elems elems;
af6b6374
JB		 2272 u16 status;
2273
2274 if (!skb) {
2275 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2276 return WORK_DONE_DESTROY;
2277 }
2278
e5b900d2
JB		 2279 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2280 mutex_lock(&wk->sdata->u.mgd.mtx);
2281 rx_status = (void *) skb->cb;
2282 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2283 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2284 &elems, true);
2285 mutex_unlock(&wk->sdata->u.mgd.mtx);
2286
2287 wk->type = IEEE80211_WORK_ASSOC;
2288 /* not really done yet */
2289 return WORK_DONE_REQUEUE;
2290 }
2291
af6b6374
JB		 2292 mgmt = (void *)skb->data;
2293 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2294
2295 if (status == WLAN_STATUS_SUCCESS) {
2296 mutex_lock(&wk->sdata->u.mgd.mtx);
2297 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2298 mutex_unlock(&wk->sdata->u.mgd.mtx);
2299 /* oops -- internal error -- send timeout for now */
2300 cfg80211_send_assoc_timeout(wk->sdata->dev,
2301 wk->filter_ta);
2302 return WORK_DONE_DESTROY;
2303 }
68542962
JO		 2304
2305 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2306 }
2307
2308 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2309 return WORK_DONE_DESTROY;
2310}
2311
77fdaa12
JB		 2312int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2313 struct cfg80211_assoc_request *req)
f0706e82 2314{
77fdaa12 2315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2316 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2317 struct ieee80211_work *wk;
63f170e0 2318 const u8 *ssid;
af6b6374 2319 int i;
f0706e82 2320
77fdaa12 2321 mutex_lock(&ifmgd->mtx);
af6b6374 2322 if (ifmgd->associated) {
9c87ba67
JM		 2323 if (!req->prev_bssid ||
2324 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2325 ETH_ALEN)) {
2326 /*
2327 * We are already associated and the request was not a
2328 * reassociation request from the current BSS, so
2329 * reject it.
2330 */
2331 mutex_unlock(&ifmgd->mtx);
2332 return -EALREADY;
2333 }
2334
2335 /* Trying to reassociate - clear previous association state */
53f73c09 2336 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2337 }
2338 mutex_unlock(&ifmgd->mtx);
77fdaa12 2339
63f170e0 2340 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2341 if (!wk)
2342 return -ENOMEM;
77fdaa12 2343
77fdaa12 2344 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2345 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2346
d8ec4433
JO		 2347 ifmgd->beacon_crc_valid = false;
2348
77fdaa12
JB		 2349 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2350 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2351 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2352 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2353 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2354
77fdaa12
JB		 2355
2356 if (req->ie && req->ie_len) {
2357 memcpy(wk->ie, req->ie, req->ie_len);
2358 wk->ie_len = req->ie_len;
2359 } else
2360 wk->ie_len = 0;
2361
0c1ad2ca 2362 wk->assoc.bss = req->bss;
f679f65d 2363
af6b6374 2364 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2365
af6b6374
JB		 2366 /* new association always uses requested smps mode */
2367 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2368 if (ifmgd->powersave)
2369 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2370 else
2371 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2372 } else
2373 ifmgd->ap_smps = ifmgd->req_smps;
2374
2375 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2376 /*
2377 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2378 * We still associate in non-HT mode (11a/b/g) if any one of these
2379 * ciphers is configured as pairwise.
2380 * We can set this to true for non-11n hardware, that'll be checked
2381 * separately along with the peer capabilities.
2382 */
af6b6374 2383 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2384 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2385 wk->assoc.wmm_used = bss->wmm_used;
2386 wk->assoc.supp_rates = bss->supp_rates;
2387 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2388 wk->assoc.ht_information_ie =
2389 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2390
ab13315a
KV		 2391 if (bss->wmm_used && bss->uapsd_supported &&
2392 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2393 wk->assoc.uapsd_used = true;
2394 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2395 } else {
2396 wk->assoc.uapsd_used = false;
2397 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2398 }
2399
63f170e0 2400 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2401 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2402 wk->assoc.ssid_len = ssid[1];
63f170e0 2403
77fdaa12 2404 if (req->prev_bssid)
f679f65d 2405 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2406
f679f65d 2407 wk->chan = req->bss->channel;
af6b6374
JB		 2408 wk->sdata = sdata;
2409 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2410 if (!bss->dtim_period &&
2411 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2412 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2413 else
2414 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2415
2416 if (req->use_mfp) {
2417 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2418 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2419 } else {
2420 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2421 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2422 }
2423
2424 if (req->crypto.control_port)
2425 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2426 else
2427 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2428
a621fa4d
JB		 2429 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2430 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2431
af6b6374
JB		 2432 ieee80211_add_work(wk);
2433 return 0;
f0706e82
JB		 2434}
2435
77fdaa12 2436int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2437 struct cfg80211_deauth_request *req,
2438 void *cookie)
f0706e82 2439{
af6b6374 2440 struct ieee80211_local *local = sdata->local;
46900298 2441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2442 struct ieee80211_work *wk;
05e48e8e
JM		 2443 u8 bssid[ETH_ALEN];
2444 bool assoc_bss = false;
f0706e82 2445
77fdaa12
JB		 2446 mutex_lock(&ifmgd->mtx);
2447
05e48e8e 2448 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2449 if (ifmgd->associated == req->bss) {
53f73c09 2450 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2451 mutex_unlock(&ifmgd->mtx);
05e48e8e 2452 assoc_bss = true;
af6b6374
JB		 2453 } else {
2454 bool not_auth_yet = false;
f0706e82 2455
a58ce43f 2456 mutex_unlock(&ifmgd->mtx);
a58ce43f 2457
a1699b75 2458 mutex_lock(&local->mtx);
af6b6374 2459 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2460 if (wk->sdata != sdata)
af6b6374 2461 continue;
29165e4c
JB		 2462
2463 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2464 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2465 wk->type != IEEE80211_WORK_ASSOC &&
2466 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2467 continue;
2468
af6b6374
JB		 2469 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2470 continue;
29165e4c
JB		 2471
2472 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2473 list_del_rcu(&wk->list);
af6b6374
JB		 2474 free_work(wk);
2475 break;
2476 }
a1699b75 2477 mutex_unlock(&local->mtx);
af6b6374
JB		 2478
2479 /*
2480 * If somebody requests authentication and we haven't
2481 * sent out an auth frame yet there's no need to send
2482 * out a deauth frame either. If the state was PROBE,
2483 * then this is the case. If it's AUTH we have sent a
2484 * frame, and if it's IDLE we have completed the auth
2485 * process already.
2486 */
2487 if (not_auth_yet) {
2488 __cfg80211_auth_canceled(sdata->dev, bssid);
2489 return 0;
2490 }
2491 }
77fdaa12 2492
0ff71613 2493 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2494 sdata->name, bssid, req->reason_code);
0ff71613 2495
d5cdfacb
JM		 2496 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2497 req->reason_code, cookie,
2498 !req->local_state_change);
05e48e8e
JM		 2499 if (assoc_bss)
2500 sta_info_destroy_addr(sdata, bssid);
f0706e82 2501
7da7cc1d 2502 mutex_lock(&sdata->local->mtx);
bc83b681 2503 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2504 mutex_unlock(&sdata->local->mtx);
bc83b681 2505
f0706e82
JB		 2506 return 0;
2507}
84363e6e 2508
77fdaa12 2509int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2510 struct cfg80211_disassoc_request *req,
2511 void *cookie)
9c6bd790 2512{
77fdaa12 2513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2514 u8 bssid[ETH_ALEN];
9c6bd790 2515
77fdaa12 2516 mutex_lock(&ifmgd->mtx);
10f644a4 2517
8d8b261a
JB		 2518 /*
2519 * cfg80211 should catch this ... but it's racy since
2520 * we can receive a disassoc frame, process it, hand it
2521 * to cfg80211 while that's in a locked section already
2522 * trying to tell us that the user wants to disconnect.
2523 */
0c1ad2ca 2524 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2525 mutex_unlock(&ifmgd->mtx);
2526 return -ENOLINK;
2527 }
2528
0ff71613 2529 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2530 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2531
e69e95db 2532 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2533 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2534
2535 mutex_unlock(&ifmgd->mtx);
10f644a4 2536
77fdaa12 2537 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2538 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2539 cookie, !req->local_state_change);
e69e95db 2540 sta_info_destroy_addr(sdata, bssid);
bc83b681 2541
7da7cc1d 2542 mutex_lock(&sdata->local->mtx);
bc83b681 2543 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2544 mutex_unlock(&sdata->local->mtx);
bc83b681 2545
10f644a4
JB		 2546 return 0;
2547}
026331c4 2548
a97c13c3
JO		 2549void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2550 enum nl80211_cqm_rssi_threshold_event rssi_event,
2551 gfp_t gfp)
2552{
2553 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2554
b5878a2d
JB		 2555 trace_api_cqm_rssi_notify(sdata, rssi_event);
2556
a97c13c3
JO		 2557 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2558}
2559EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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