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ath5k: Fix fast channel switching
[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;
172710bf 164 int hti_cfreq;
9ed6bcce 165 u16 ht_opmode;
0aaffa9b
JB		 166 bool enable_ht = true;
167 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 168 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
169
170 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
171
0aaffa9b
JB		 172 prev_chantype = sdata->vif.bss_conf.channel_type;
173
d5522e03
JB		 174 /* HT is not supported */
175 if (!sband->ht_cap.ht_supported)
176 enable_ht = false;
177
172710bf
BG		 178 if (enable_ht) {
179 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
180 sband->band);
181 /* check that channel matches the right operating channel */
182 if (local->hw.conf.channel->center_freq != hti_cfreq) {
183 /* Some APs mess this up, evidently.
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel, for instance.
186 */
187 printk(KERN_DEBUG
188 "%s: Wrong control channel in association"
189 " response: configured center-freq: %d"
190 " hti-cfreq: %d hti->control_chan: %d"
191 " band: %d. Disabling HT.\n",
192 sdata->name,
193 local->hw.conf.channel->center_freq,
194 hti_cfreq, hti->control_chan,
195 sband->band);
196 enable_ht = false;
197 }
198 }
d5522e03
JB		 199
200 if (enable_ht) {
201 channel_type = NL80211_CHAN_HT20;
202
203 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
204 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
205 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
206 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 208 if (!(local->hw.conf.channel->flags &
209 IEEE80211_CHAN_NO_HT40PLUS))
210 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 211 break;
212 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40MINUS))
215 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 216 break;
217 }
218 }
219 }
220
fe6f212c
RC		 221 if (local->tmp_channel)
222 local->tmp_channel_type = channel_type;
d5522e03 223
0aaffa9b
JB		 224 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
225 /* can only fail due to HT40+/- mismatch */
226 channel_type = NL80211_CHAN_HT20;
227 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
228 }
d5522e03 229
0aaffa9b
JB		 230 /* channel_type change automatically detected */
231 ieee80211_hw_config(local, 0);
d5522e03 232
0aaffa9b 233 if (prev_chantype != channel_type) {
d5522e03 234 rcu_read_lock();
abe60632 235 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 236 if (sta)
237 rate_control_rate_update(local, sband, sta,
4fa00437 238 IEEE80211_RC_HT_CHANGED,
0aaffa9b 239 channel_type);
d5522e03 240 rcu_read_unlock();
0aaffa9b 241 }
d5522e03 242
9ed6bcce 243 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 244
245 /* if bss configuration changed store the new one */
0aaffa9b
JB		 246 if (sdata->ht_opmode_valid != enable_ht ||
247 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
248 prev_chantype != channel_type) {
d5522e03 249 changed |= BSS_CHANGED_HT;
9ed6bcce 250 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 251 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 252 }
253
254 return changed;
255}
256
9c6bd790
JB		 257/* frame sending functions */
258
ef422bc0 259static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 260 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 261 void *cookie, bool send_frame)
9ac19a90
JB		 262{
263 struct ieee80211_local *local = sdata->local;
46900298 264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 265 struct sk_buff *skb;
266 struct ieee80211_mgmt *mgmt;
9aed3cc1 267
65fc73ac 268 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 269 if (!skb) {
ef422bc0 270 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 271 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 272 return;
273 }
274 skb_reserve(skb, local->hw.extra_tx_headroom);
275
276 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
277 memset(mgmt, 0, 24);
77fdaa12 278 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 279 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 280 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 281 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 282 skb_put(skb, 2);
ef422bc0 283 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 284 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
285
53b46b84 286 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 287 if (cookie)
288 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
289 else
290 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 291 else
ce470613
HS		 292 if (cookie)
293 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
294 else
295 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 296 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
297 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 298
299 if (send_frame)
300 ieee80211_tx_skb(sdata, skb);
301 else
302 kfree_skb(skb);
9ac19a90
JB		 303}
304
572e0012
KV		 305void ieee80211_send_pspoll(struct ieee80211_local *local,
306 struct ieee80211_sub_if_data *sdata)
307{
572e0012
KV		 308 struct ieee80211_pspoll *pspoll;
309 struct sk_buff *skb;
572e0012 310
d8cd189e
KV		 311 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
312 if (!skb)
572e0012 313 return;
572e0012 314
d8cd189e
KV		 315 pspoll = (struct ieee80211_pspoll *) skb->data;
316 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 317
62ae67be
JB		 318 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
319 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 320}
321
965bedad
JB		 322void ieee80211_send_nullfunc(struct ieee80211_local *local,
323 struct ieee80211_sub_if_data *sdata,
324 int powersave)
325{
326 struct sk_buff *skb;
d8cd189e 327 struct ieee80211_hdr_3addr *nullfunc;
965bedad 328
d8cd189e
KV		 329 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
330 if (!skb)
965bedad 331 return;
965bedad 332
d8cd189e 333 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 334 if (powersave)
d8cd189e 335 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 336
62ae67be
JB		 337 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
338 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 339}
340
d524215f
FF		 341static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
342 struct ieee80211_sub_if_data *sdata)
343{
344 struct sk_buff *skb;
345 struct ieee80211_hdr *nullfunc;
346 __le16 fc;
347
348 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
349 return;
350
351 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
352 if (!skb) {
353 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
354 "nullfunc frame\n", sdata->name);
355 return;
356 }
357 skb_reserve(skb, local->hw.extra_tx_headroom);
358
359 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
360 memset(nullfunc, 0, 30);
361 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
362 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
363 nullfunc->frame_control = fc;
364 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
365 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
366 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
367 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
368
369 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
370 ieee80211_tx_skb(sdata, skb);
371}
372
cc32abd4
JB		 373/* spectrum management related things */
374static void ieee80211_chswitch_work(struct work_struct *work)
375{
376 struct ieee80211_sub_if_data *sdata =
377 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
379
9607e6b6 380 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 381 return;
382
77fdaa12
JB		 383 mutex_lock(&ifmgd->mtx);
384 if (!ifmgd->associated)
385 goto out;
cc32abd4
JB		 386
387 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 388 if (!sdata->local->ops->channel_switch) {
389 /* call "hw_config" only if doing sw channel switch */
390 ieee80211_hw_config(sdata->local,
391 IEEE80211_CONF_CHANGE_CHANNEL);
392 }
77fdaa12 393
cc32abd4 394 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 395 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 396
cc32abd4
JB		 397 ieee80211_wake_queues_by_reason(&sdata->local->hw,
398 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 399 out:
400 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
401 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 402}
403
5ce6e438
JB		 404void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
405{
406 struct ieee80211_sub_if_data *sdata;
407 struct ieee80211_if_managed *ifmgd;
408
409 sdata = vif_to_sdata(vif);
410 ifmgd = &sdata->u.mgd;
411
412 trace_api_chswitch_done(sdata, success);
413 if (!success) {
414 /*
415 * If the channel switch was not successful, stay
416 * around on the old channel. We currently lack
417 * good handling of this situation, possibly we
418 * should just drop the association.
419 */
420 sdata->local->csa_channel = sdata->local->oper_channel;
421 }
422
423 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
424}
425EXPORT_SYMBOL(ieee80211_chswitch_done);
426
cc32abd4
JB		 427static void ieee80211_chswitch_timer(unsigned long data)
428{
429 struct ieee80211_sub_if_data *sdata =
430 (struct ieee80211_sub_if_data *) data;
431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
432
5bb644a0
JB		 433 if (sdata->local->quiescing) {
434 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
435 return;
436 }
437
42935eca 438 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 439}
440
441void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
442 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 443 struct ieee80211_bss *bss,
444 u64 timestamp)
cc32abd4 445{
0c1ad2ca
JB		 446 struct cfg80211_bss *cbss =
447 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 448 struct ieee80211_channel *new_ch;
449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 450 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
451 cbss->channel->band);
cc32abd4 452
77fdaa12
JB		 453 ASSERT_MGD_MTX(ifmgd);
454
455 if (!ifmgd->associated)
cc32abd4
JB		 456 return;
457
fbe9c429 458 if (sdata->local->scanning)
cc32abd4
JB		 459 return;
460
461 /* Disregard subsequent beacons if we are already running a timer
462 processing a CSA */
463
464 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
465 return;
466
467 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
468 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
469 return;
470
471 sdata->local->csa_channel = new_ch;
472
5ce6e438
JB		 473 if (sdata->local->ops->channel_switch) {
474 /* use driver's channel switch callback */
475 struct ieee80211_channel_switch ch_switch;
476 memset(&ch_switch, 0, sizeof(ch_switch));
477 ch_switch.timestamp = timestamp;
478 if (sw_elem->mode) {
479 ch_switch.block_tx = true;
480 ieee80211_stop_queues_by_reason(&sdata->local->hw,
481 IEEE80211_QUEUE_STOP_REASON_CSA);
482 }
483 ch_switch.channel = new_ch;
484 ch_switch.count = sw_elem->count;
485 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
486 drv_channel_switch(sdata->local, &ch_switch);
487 return;
488 }
489
490 /* channel switch handled in software */
cc32abd4 491 if (sw_elem->count <= 1) {
42935eca 492 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 493 } else {
9feaddc7
WYG		 494 if (sw_elem->mode)
495 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 496 IEEE80211_QUEUE_STOP_REASON_CSA);
497 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
498 mod_timer(&ifmgd->chswitch_timer,
499 jiffies +
500 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 501 cbss->beacon_interval));
cc32abd4
JB		 502 }
503}
504
505static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
506 u16 capab_info, u8 *pwr_constr_elem,
507 u8 pwr_constr_elem_len)
508{
509 struct ieee80211_conf *conf = &sdata->local->hw.conf;
510
511 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
512 return;
513
514 /* Power constraint IE length should be 1 octet */
515 if (pwr_constr_elem_len != 1)
516 return;
517
518 if ((*pwr_constr_elem <= conf->channel->max_power) &&
519 (*pwr_constr_elem != sdata->local->power_constr_level)) {
520 sdata->local->power_constr_level = *pwr_constr_elem;
521 ieee80211_hw_config(sdata->local, 0);
522 }
523}
524
f90754c1
JO		 525void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
526{
527 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
528 struct ieee80211_local *local = sdata->local;
529 struct ieee80211_conf *conf = &local->hw.conf;
530
531 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
532 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
533 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
534
535 local->disable_dynamic_ps = false;
536 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
537}
538EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
539
540void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
541{
542 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_conf *conf = &local->hw.conf;
545
546 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
547 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
548 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
549
550 local->disable_dynamic_ps = true;
551 conf->dynamic_ps_timeout = 0;
552 del_timer_sync(&local->dynamic_ps_timer);
553 ieee80211_queue_work(&local->hw,
554 &local->dynamic_ps_enable_work);
555}
556EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
557
965bedad
JB		 558/* powersave */
559static void ieee80211_enable_ps(struct ieee80211_local *local,
560 struct ieee80211_sub_if_data *sdata)
561{
562 struct ieee80211_conf *conf = &local->hw.conf;
563
d5edaedc
JB		 564 /*
565 * If we are scanning right now then the parameters will
566 * take effect when scan finishes.
567 */
fbe9c429 568 if (local->scanning)
d5edaedc
JB		 569 return;
570
965bedad
JB		 571 if (conf->dynamic_ps_timeout > 0 &&
572 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
573 mod_timer(&local->dynamic_ps_timer, jiffies +
574 msecs_to_jiffies(conf->dynamic_ps_timeout));
575 } else {
576 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
577 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 578
2a13052f
JO		 579 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
580 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
581 return;
582
583 conf->flags |= IEEE80211_CONF_PS;
584 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 585 }
586}
587
588static void ieee80211_change_ps(struct ieee80211_local *local)
589{
590 struct ieee80211_conf *conf = &local->hw.conf;
591
592 if (local->ps_sdata) {
965bedad
JB		 593 ieee80211_enable_ps(local, local->ps_sdata);
594 } else if (conf->flags & IEEE80211_CONF_PS) {
595 conf->flags &= ~IEEE80211_CONF_PS;
596 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
597 del_timer_sync(&local->dynamic_ps_timer);
598 cancel_work_sync(&local->dynamic_ps_enable_work);
599 }
600}
601
602/* need to hold RTNL or interface lock */
10f644a4 603void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 604{
605 struct ieee80211_sub_if_data *sdata, *found = NULL;
606 int count = 0;
195e294d 607 int timeout;
965bedad
JB		 608
609 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
610 local->ps_sdata = NULL;
611 return;
612 }
613
af6b6374
JB		 614 if (!list_empty(&local->work_list)) {
615 local->ps_sdata = NULL;
616 goto change;
617 }
618
965bedad 619 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 620 if (!ieee80211_sdata_running(sdata))
965bedad 621 continue;
8c7914de
RM		 622 if (sdata->vif.type == NL80211_IFTYPE_AP) {
623 /* If an AP vif is found, then disable PS
624 * by setting the count to zero thereby setting
625 * ps_sdata to NULL.
626 */
627 count = 0;
628 break;
629 }
965bedad
JB		 630 if (sdata->vif.type != NL80211_IFTYPE_STATION)
631 continue;
632 found = sdata;
633 count++;
634 }
635
43f78531 636 if (count == 1 && found->u.mgd.powersave &&
af6b6374 637 found->u.mgd.associated &&
56007a02 638 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 639 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
640 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 641 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 642 s32 beaconint_us;
643
644 if (latency < 0)
ed77134b 645 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 646
647 beaconint_us = ieee80211_tu_to_usec(
648 found->vif.bss_conf.beacon_int);
649
ff616381 650 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 651 if (timeout < 0) {
652 /*
ff616381
JO		 653 * Go to full PSM if the user configures a very low
654 * latency requirement.
0ab82b04
EP		 655 * The 2000 second value is there for compatibility
656 * until the PM_QOS_NETWORK_LATENCY is configured
657 * with real values.
195e294d 658 */
0ab82b04
EP		 659 if (latency > (1900 * USEC_PER_MSEC) &&
660 latency != (2000 * USEC_PER_SEC))
195e294d 661 timeout = 0;
ff616381
JO		 662 else
663 timeout = 100;
195e294d 664 }
f90754c1
JO		 665 local->dynamic_ps_user_timeout = timeout;
666 if (!local->disable_dynamic_ps)
667 conf->dynamic_ps_timeout =
668 local->dynamic_ps_user_timeout;
195e294d 669
04fe2037 670 if (beaconint_us > latency) {
10f644a4 671 local->ps_sdata = NULL;
04fe2037 672 } else {
56007a02 673 struct ieee80211_bss *bss;
04fe2037 674 int maxslp = 1;
56007a02 675 u8 dtimper;
04fe2037 676
56007a02
JB		 677 bss = (void *)found->u.mgd.associated->priv;
678 dtimper = bss->dtim_period;
679
680 /* If the TIM IE is invalid, pretend the value is 1 */
681 if (!dtimper)
682 dtimper = 1;
683 else if (dtimper > 1)
04fe2037
JB		 684 maxslp = min_t(int, dtimper,
685 latency / beaconint_us);
686
9ccebe61 687 local->hw.conf.max_sleep_period = maxslp;
56007a02 688 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 689 local->ps_sdata = found;
04fe2037 690 }
10f644a4 691 } else {
965bedad 692 local->ps_sdata = NULL;
10f644a4 693 }
965bedad 694
af6b6374 695 change:
965bedad
JB		 696 ieee80211_change_ps(local);
697}
698
699void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
700{
701 struct ieee80211_local *local =
702 container_of(work, struct ieee80211_local,
703 dynamic_ps_disable_work);
704
705 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
706 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
707 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
708 }
709
710 ieee80211_wake_queues_by_reason(&local->hw,
711 IEEE80211_QUEUE_STOP_REASON_PS);
712}
713
714void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
715{
716 struct ieee80211_local *local =
717 container_of(work, struct ieee80211_local,
718 dynamic_ps_enable_work);
719 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 721
722 /* can only happen when PS was just disabled anyway */
723 if (!sdata)
724 return;
725
726 if (local->hw.conf.flags & IEEE80211_CONF_PS)
727 return;
728
375177bf
VN		 729 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
730 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 731 ieee80211_send_nullfunc(local, sdata, 1);
732
2a13052f
JO		 733 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
734 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 735 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
736 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
737 local->hw.conf.flags |= IEEE80211_CONF_PS;
738 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
739 }
965bedad
JB		 740}
741
742void ieee80211_dynamic_ps_timer(unsigned long data)
743{
744 struct ieee80211_local *local = (void *) data;
745
78f1a8b7 746 if (local->quiescing || local->suspended)
5bb644a0
JB		 747 return;
748
42935eca 749 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 750}
751
60f8b39c 752/* MLME */
f698d856 753static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 754 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 755 u8 *wmm_param, size_t wmm_param_len)
756{
f0706e82 757 struct ieee80211_tx_queue_params params;
4ced3f74 758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 759 size_t left;
760 int count;
ab13315a 761 u8 *pos, uapsd_queues = 0;
f0706e82 762
e1b3ec1a
SG		 763 if (!local->ops->conf_tx)
764 return;
765
af6b6374 766 if (local->hw.queues < 4)
3434fbd3
JB		 767 return;
768
769 if (!wmm_param)
770 return;
771
f0706e82
JB		 772 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
773 return;
ab13315a
KV		 774
775 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 776 uapsd_queues = local->uapsd_queues;
ab13315a 777
f0706e82 778 count = wmm_param[6] & 0x0f;
46900298 779 if (count == ifmgd->wmm_last_param_set)
f0706e82 780 return;
46900298 781 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 782
783 pos = wmm_param + 8;
784 left = wmm_param_len - 8;
785
786 memset(&params, 0, sizeof(params));
787
f0706e82
JB		 788 local->wmm_acm = 0;
789 for (; left >= 4; left -= 4, pos += 4) {
790 int aci = (pos[0] >> 5) & 0x03;
791 int acm = (pos[0] >> 4) & 0x01;
ab13315a 792 bool uapsd = false;
f0706e82
JB		 793 int queue;
794
795 switch (aci) {
0eeb59fe 796 case 1: /* AC_BK */
e100bb64 797 queue = 3;
988c0f72 798 if (acm)
0eeb59fe 799 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 800 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
801 uapsd = true;
f0706e82 802 break;
0eeb59fe 803 case 2: /* AC_VI */
e100bb64 804 queue = 1;
988c0f72 805 if (acm)
0eeb59fe 806 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 807 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
808 uapsd = true;
f0706e82 809 break;
0eeb59fe 810 case 3: /* AC_VO */
e100bb64 811 queue = 0;
988c0f72 812 if (acm)
0eeb59fe 813 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 814 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
815 uapsd = true;
f0706e82 816 break;
0eeb59fe 817 case 0: /* AC_BE */
f0706e82 818 default:
e100bb64 819 queue = 2;
988c0f72 820 if (acm)
0eeb59fe 821 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 822 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
823 uapsd = true;
f0706e82
JB		 824 break;
825 }
826
827 params.aifs = pos[0] & 0x0f;
828 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
829 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 830 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 831 params.uapsd = uapsd;
832
f4ea83dd 833#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 834 wiphy_debug(local->hw.wiphy,
835 "WMM queue=%d aci=%d acm=%d aifs=%d "
836 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
837 queue, aci, acm,
838 params.aifs, params.cw_min, params.cw_max,
839 params.txop, params.uapsd);
3330d7be 840#endif
e1b3ec1a 841 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 842 wiphy_debug(local->hw.wiphy,
843 "failed to set TX queue parameters for queue %d\n",
844 queue);
f0706e82 845 }
e1b3ec1a
SG		 846
847 /* enable WMM or activate new settings */
4ced3f74
JB		 848 sdata->vif.bss_conf.qos = true;
849 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 850}
851
7a5158ef
JB		 852static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
853 u16 capab, bool erp_valid, u8 erp)
5628221c 854{
bda3933a 855 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 856 u32 changed = 0;
7a5158ef
JB		 857 bool use_protection;
858 bool use_short_preamble;
859 bool use_short_slot;
860
861 if (erp_valid) {
862 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
863 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
864 } else {
865 use_protection = false;
866 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
867 }
868
869 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 870 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
871 use_short_slot = true;
5628221c 872
471b3efd 873 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 874 bss_conf->use_cts_prot = use_protection;
875 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 876 }
7e9ed188 877
d43c7b37 878 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 879 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 880 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 881 }
d9430a32 882
7a5158ef 883 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 884 bss_conf->use_short_slot = use_short_slot;
885 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 886 }
887
888 return changed;
889}
890
f698d856 891static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 892 struct cfg80211_bss *cbss,
ae5eb026 893 u32 bss_info_changed)
f0706e82 894{
0c1ad2ca 895 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 896 struct ieee80211_local *local = sdata->local;
68542962 897 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 898
ae5eb026 899 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 900 /* set timing information */
68542962
JO		 901 bss_conf->beacon_int = cbss->beacon_interval;
902 bss_conf->timestamp = cbss->tsf;
5628221c 903
77fdaa12
JB		 904 bss_info_changed |= BSS_CHANGED_BEACON_INT;
905 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 906 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 907
7ccc8bd7
FF		 908 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
909 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
910
0c1ad2ca
JB		 911 sdata->u.mgd.associated = cbss;
912 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 913
17e4ec14
JM		 914 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
915
b291ba11
JB		 916 /* just to be sure */
917 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
918 IEEE80211_STA_BEACON_POLL);
919
9ac19a90 920 ieee80211_led_assoc(local, 1);
9306102e 921
e5b900d2
JB		 922 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
923 bss_conf->dtim_period = bss->dtim_period;
924 else
925 bss_conf->dtim_period = 0;
926
68542962 927 bss_conf->assoc = 1;
96dd22ac
JB		 928 /*
929 * For now just always ask the driver to update the basic rateset
930 * when we have associated, we aren't checking whether it actually
931 * changed or not.
932 */
ae5eb026 933 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 934
935 /* And the BSSID changed - we're associated now */
936 bss_info_changed |= BSS_CHANGED_BSSID;
937
a97c13c3
JO		 938 /* Tell the driver to monitor connection quality (if supported) */
939 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 940 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 941 bss_info_changed |= BSS_CHANGED_CQM;
942
68542962
JO		 943 /* Enable ARP filtering */
944 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
945 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
946 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
947 }
948
ae5eb026 949 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 950
056508dc
JB		 951 mutex_lock(&local->iflist_mtx);
952 ieee80211_recalc_ps(local, -1);
025e6be2 953 ieee80211_recalc_smps(local);
056508dc 954 mutex_unlock(&local->iflist_mtx);
e0cb686f 955
8a5b33f5 956 netif_tx_start_all_queues(sdata->dev);
9ac19a90 957 netif_carrier_on(sdata->dev);
f0706e82
JB		 958}
959
e69e95db 960static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 961 bool remove_sta, bool tx)
aa458d17 962{
46900298 963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 964 struct ieee80211_local *local = sdata->local;
965 struct sta_info *sta;
e0cb686f 966 u32 changed = 0, config_changed = 0;
b291ba11 967 u8 bssid[ETH_ALEN];
aa458d17 968
77fdaa12
JB		 969 ASSERT_MGD_MTX(ifmgd);
970
b291ba11
JB		 971 if (WARN_ON(!ifmgd->associated))
972 return;
973
0c1ad2ca 974 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 975
77fdaa12
JB		 976 ifmgd->associated = NULL;
977 memset(ifmgd->bssid, 0, ETH_ALEN);
978
979 /*
980 * we need to commit the associated = NULL change because the
981 * scan code uses that to determine whether this iface should
982 * go to/wake up from powersave or not -- and could otherwise
983 * wake the queues erroneously.
984 */
985 smp_mb();
986
987 /*
988 * Thus, we can only afterwards stop the queues -- to account
989 * for the case where another CPU is finishing a scan at this
990 * time -- we don't want the scan code to enable queues.
991 */
aa458d17 992
8a5b33f5 993 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 994 netif_carrier_off(sdata->dev);
995
2a419056 996 mutex_lock(&local->sta_mtx);
abe60632 997 sta = sta_info_get(sdata, bssid);
4cad6c7c 998 if (sta) {
2a419056 999 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1000 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1001 }
2a419056 1002 mutex_unlock(&local->sta_mtx);
aa458d17 1003
f5e5bf25
TW		 1004 changed |= ieee80211_reset_erp_info(sdata);
1005
f5e5bf25 1006 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1007 changed |= BSS_CHANGED_ASSOC;
1008 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1009
aa837e1d
JB		 1010 ieee80211_set_wmm_default(sdata);
1011
4797938c 1012 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1013 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1014
413ad50a
JB		 1015 /* on the next assoc, re-program HT parameters */
1016 sdata->ht_opmode_valid = false;
1017
a8302de9
VT		 1018 local->power_constr_level = 0;
1019
520eb820
KV		 1020 del_timer_sync(&local->dynamic_ps_timer);
1021 cancel_work_sync(&local->dynamic_ps_enable_work);
1022
e0cb686f
KV		 1023 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1024 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1025 config_changed |= IEEE80211_CONF_CHANGE_PS;
1026 }
ae5eb026 1027
e0cb686f 1028 ieee80211_hw_config(local, config_changed);
9cef8737 1029
68542962
JO		 1030 /* Disable ARP filtering */
1031 if (sdata->vif.bss_conf.arp_filter_enabled) {
1032 sdata->vif.bss_conf.arp_filter_enabled = false;
1033 changed |= BSS_CHANGED_ARP_FILTER;
1034 }
1035
0aaffa9b
JB		 1036 /* The BSSID (not really interesting) and HT changed */
1037 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1038 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1039
e69e95db
JM		 1040 if (remove_sta)
1041 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1042
1043 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1044 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1045 del_timer_sync(&sdata->u.mgd.timer);
1046 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1047}
f0706e82 1048
3cf335d5
KV		 1049void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1050 struct ieee80211_hdr *hdr)
1051{
1052 /*
1053 * We can postpone the mgd.timer whenever receiving unicast frames
1054 * from AP because we know that the connection is working both ways
1055 * at that time. But multicast frames (and hence also beacons) must
1056 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1057 * data idle periods for sending the periodic probe request to the
1058 * AP we're connected to.
3cf335d5 1059 */
b291ba11
JB		 1060 if (is_multicast_ether_addr(hdr->addr1))
1061 return;
1062
be099e82 1063 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1064}
f0706e82 1065
4e5ff376
FF		 1066static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1067{
1068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1069
1070 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1071 IEEE80211_STA_CONNECTION_POLL)))
1072 return;
1073
1074 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1075 IEEE80211_STA_BEACON_POLL);
1076 mutex_lock(&sdata->local->iflist_mtx);
1077 ieee80211_recalc_ps(sdata->local, -1);
1078 mutex_unlock(&sdata->local->iflist_mtx);
1079
1080 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1081 return;
1082
1083 /*
1084 * We've received a probe response, but are not sure whether
1085 * we have or will be receiving any beacons or data, so let's
1086 * schedule the timers again, just in case.
1087 */
1088 ieee80211_sta_reset_beacon_monitor(sdata);
1089
1090 mod_timer(&ifmgd->conn_mon_timer,
1091 round_jiffies_up(jiffies +
1092 IEEE80211_CONNECTION_IDLE_TIME));
1093}
1094
1095void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1096 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1097{
75706d0e 1098 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1099 return;
1100
04ac3c0e
FF		 1101 if (ack)
1102 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1103
1104 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1105 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1106 if (ack)
1107 sdata->u.mgd.probe_send_count = 0;
1108 else
1109 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1110 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1111 }
1112}
1113
a43abf29
ML		 1114static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1115{
1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1117 const u8 *ssid;
f01a067d
LR		 1118 u8 *dst = ifmgd->associated->bssid;
1119 u8 unicast_limit = max(1, IEEE80211_MAX_PROBE_TRIES - 3);
1120
1121 /*
1122 * Try sending broadcast probe requests for the last three
1123 * probe requests after the first ones failed since some
1124 * buggy APs only support broadcast probe requests.
1125 */
1126 if (ifmgd->probe_send_count >= unicast_limit)
1127 dst = NULL;
a43abf29 1128
4e5ff376
FF		 1129 /*
1130 * When the hardware reports an accurate Tx ACK status, it's
1131 * better to send a nullfunc frame instead of a probe request,
1132 * as it will kick us off the AP quickly if we aren't associated
1133 * anymore. The timeout will be reset if the frame is ACKed by
1134 * the AP.
1135 */
04ac3c0e
FF		 1136 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1137 ifmgd->nullfunc_failed = false;
4e5ff376 1138 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1139 } else {
4e5ff376
FF		 1140 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1141 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
1142 }
a43abf29
ML		 1143
1144 ifmgd->probe_send_count++;
1145 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1146 run_again(ifmgd, ifmgd->probe_timeout);
1147}
1148
b291ba11
JB		 1149static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1150 bool beacon)
04de8381 1151{
04de8381 1152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1153 bool already = false;
34bfc411 1154
9607e6b6 1155 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1156 return;
1157
91a3bd76
LR		 1158 if (sdata->local->scanning)
1159 return;
1160
b8bc4b0a
JB		 1161 if (sdata->local->tmp_channel)
1162 return;
1163
77fdaa12
JB		 1164 mutex_lock(&ifmgd->mtx);
1165
1166 if (!ifmgd->associated)
1167 goto out;
1168
a860402d 1169#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1170 if (beacon && net_ratelimit())
1171 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1172 "- sending probe request\n", sdata->name);
a860402d 1173#endif
04de8381 1174
b291ba11
JB		 1175 /*
1176 * The driver/our work has already reported this event or the
1177 * connection monitoring has kicked in and we have already sent
1178 * a probe request. Or maybe the AP died and the driver keeps
1179 * reporting until we disassociate...
1180 *
1181 * In either case we have to ignore the current call to this
1182 * function (except for setting the correct probe reason bit)
1183 * because otherwise we would reset the timer every time and
1184 * never check whether we received a probe response!
1185 */
1186 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1187 IEEE80211_STA_CONNECTION_POLL))
1188 already = true;
1189
1190 if (beacon)
1191 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1192 else
1193 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1194
1195 if (already)
1196 goto out;
1197
4e751843
JB		 1198 mutex_lock(&sdata->local->iflist_mtx);
1199 ieee80211_recalc_ps(sdata->local, -1);
1200 mutex_unlock(&sdata->local->iflist_mtx);
1201
a43abf29
ML		 1202 ifmgd->probe_send_count = 0;
1203 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1204 out:
1205 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1206}
1207
a619a4c0
JO		 1208struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1209 struct ieee80211_vif *vif)
1210{
1211 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1213 struct sk_buff *skb;
1214 const u8 *ssid;
1215
1216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1217 return NULL;
1218
1219 ASSERT_MGD_MTX(ifmgd);
1220
1221 if (!ifmgd->associated)
1222 return NULL;
1223
1224 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1225 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1226 ssid + 2, ssid[1], NULL, 0);
1227
1228 return skb;
1229}
1230EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1231
1e4dcd01
JO		 1232static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1233{
1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1235 struct ieee80211_local *local = sdata->local;
1236 u8 bssid[ETH_ALEN];
1237
1238 mutex_lock(&ifmgd->mtx);
1239 if (!ifmgd->associated) {
1240 mutex_unlock(&ifmgd->mtx);
1241 return;
1242 }
1243
1244 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1245
1246 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1247
53f73c09 1248 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1249 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1250
1251 mutex_lock(&local->mtx);
1252 ieee80211_recalc_idle(local);
1253 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1254 /*
1255 * must be outside lock due to cfg80211,
1256 * but that's not a problem.
1257 */
1258 ieee80211_send_deauth_disassoc(sdata, bssid,
1259 IEEE80211_STYPE_DEAUTH,
1260 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1261 NULL, true);
1e4dcd01
JO		 1262}
1263
1264void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1265{
1266 struct ieee80211_sub_if_data *sdata =
1267 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1268 u.mgd.beacon_connection_loss_work);
b291ba11 1269
1e4dcd01
JO		 1270 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1271 __ieee80211_connection_loss(sdata);
1272 else
1273 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1274}
1275
04de8381
KV		 1276void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1277{
1278 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1279 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1280
b5878a2d
JB		 1281 trace_api_beacon_loss(sdata);
1282
1e4dcd01
JO		 1283 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1284 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1285}
1286EXPORT_SYMBOL(ieee80211_beacon_loss);
1287
1e4dcd01
JO		 1288void ieee80211_connection_loss(struct ieee80211_vif *vif)
1289{
1290 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1291 struct ieee80211_hw *hw = &sdata->local->hw;
1292
b5878a2d
JB		 1293 trace_api_connection_loss(sdata);
1294
1e4dcd01
JO		 1295 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1296 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1297}
1298EXPORT_SYMBOL(ieee80211_connection_loss);
1299
1300
77fdaa12
JB		 1301static enum rx_mgmt_action __must_check
1302ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1303 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1304{
46900298 1305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1306 const u8 *bssid = NULL;
f0706e82
JB		 1307 u16 reason_code;
1308
f4ea83dd 1309 if (len < 24 + 2)
77fdaa12 1310 return RX_MGMT_NONE;
f0706e82 1311
77fdaa12
JB		 1312 ASSERT_MGD_MTX(ifmgd);
1313
0c1ad2ca 1314 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1315
1316 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1317
77fdaa12 1318 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1319 sdata->name, bssid, reason_code);
77fdaa12 1320
53f73c09 1321 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1322 mutex_lock(&sdata->local->mtx);
63f170e0 1323 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1324 mutex_unlock(&sdata->local->mtx);
f0706e82 1325
77fdaa12 1326 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1327}
1328
1329
77fdaa12
JB		 1330static enum rx_mgmt_action __must_check
1331ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1333{
46900298 1334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1335 u16 reason_code;
1336
f4ea83dd 1337 if (len < 24 + 2)
77fdaa12 1338 return RX_MGMT_NONE;
f0706e82 1339
77fdaa12
JB		 1340 ASSERT_MGD_MTX(ifmgd);
1341
1342 if (WARN_ON(!ifmgd->associated))
1343 return RX_MGMT_NONE;
1344
0c1ad2ca 1345 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1346 return RX_MGMT_NONE;
f0706e82
JB		 1347
1348 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1349
0ff71613 1350 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1351 sdata->name, mgmt->sa, reason_code);
f0706e82 1352
53f73c09 1353 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1354 mutex_lock(&sdata->local->mtx);
bc83b681 1355 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1356 mutex_unlock(&sdata->local->mtx);
77fdaa12 1357 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1358}
1359
1360
af6b6374
JB		 1361static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1362 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1363{
af6b6374 1364 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1366 struct ieee80211_local *local = sdata->local;
8318d78a 1367 struct ieee80211_supported_band *sband;
f0706e82 1368 struct sta_info *sta;
0c1ad2ca 1369 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1370 u8 *pos;
881d948c 1371 u32 rates, basic_rates;
af6b6374 1372 u16 capab_info, aid;
f0706e82 1373 struct ieee802_11_elems elems;
bda3933a 1374 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1375 u32 changed = 0;
5d1ec85f
JB		 1376 int i, j, err;
1377 bool have_higher_than_11mbit = false;
ae5eb026 1378 u16 ap_ht_cap_flags;
f0706e82 1379
af6b6374 1380 /* AssocResp and ReassocResp have identical structure */
f0706e82 1381
f0706e82 1382 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1383 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1384
1dd84aa2
JB		 1385 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1386 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1387 "set\n", sdata->name, aid);
1dd84aa2
JB		 1388 aid &= ~(BIT(15) | BIT(14));
1389
af6b6374
JB		 1390 pos = mgmt->u.assoc_resp.variable;
1391 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1392
f0706e82
JB		 1393 if (!elems.supp_rates) {
1394 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1395 sdata->name);
af6b6374 1396 return false;
f0706e82
JB		 1397 }
1398
46900298 1399 ifmgd->aid = aid;
f0706e82 1400
0c1ad2ca 1401 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1402 if (!sta) {
5d1ec85f
JB		 1403 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1404 " the AP\n", sdata->name);
af6b6374 1405 return false;
77fdaa12 1406 }
05e5e883 1407
5d1ec85f
JB		 1408 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1409 WLAN_STA_ASSOC_AP);
1410 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1411 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1412
60f8b39c
JB		 1413 rates = 0;
1414 basic_rates = 0;
e7480bbb 1415 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1416
60f8b39c
JB		 1417 for (i = 0; i < elems.supp_rates_len; i++) {
1418 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1419 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1420
60f8b39c
JB		 1421 if (rate > 110)
1422 have_higher_than_11mbit = true;
1423
1424 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1425 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1426 rates |= BIT(j);
d61272cb
TW		 1427 if (is_basic)
1428 basic_rates |= BIT(j);
1429 break;
1430 }
f709fc69 1431 }
f709fc69
LCC		 1432 }
1433
60f8b39c
JB		 1434 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1435 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1436 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1437
60f8b39c
JB		 1438 if (rate > 110)
1439 have_higher_than_11mbit = true;
f0706e82 1440
60f8b39c 1441 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1442 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1443 rates |= BIT(j);
d61272cb
TW		 1444 if (is_basic)
1445 basic_rates |= BIT(j);
1446 break;
1447 }
60f8b39c 1448 }
1ebebea8 1449 }
f0706e82 1450
e7480bbb 1451 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1452 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1453
1454 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1455 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1456 have_higher_than_11mbit)
1457 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1458 else
1459 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1460
ab1faead 1461 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1462 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1463 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1464
1465 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1466
4b7679a5 1467 rate_control_rate_init(sta);
f0706e82 1468
46900298 1469 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1470 set_sta_flags(sta, WLAN_STA_MFP);
1471
ddf4ac53 1472 if (elems.wmm_param)
60f8b39c 1473 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1474
5d1ec85f
JB		 1475 err = sta_info_insert(sta);
1476 sta = NULL;
1477 if (err) {
1478 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1479 " the AP (error %d)\n", sdata->name, err);
90be561b 1480 return false;
ddf4ac53
JB		 1481 }
1482
f2176d72
JO		 1483 /*
1484 * Always handle WMM once after association regardless
1485 * of the first value the AP uses. Setting -1 here has
1486 * that effect because the AP values is an unsigned
1487 * 4-bit value.
1488 */
1489 ifmgd->wmm_last_param_set = -1;
1490
ddf4ac53 1491 if (elems.wmm_param)
4ced3f74 1492 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1493 elems.wmm_param_len);
aa837e1d
JB		 1494 else
1495 ieee80211_set_wmm_default(sdata);
f0706e82 1496
e4da8c37
JB		 1497 local->oper_channel = wk->chan;
1498
ae5eb026 1499 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1500 (sdata->local->hw.queues >= 4) &&
ab1faead 1501 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1502 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1503 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1504
60f8b39c
JB		 1505 /* set AID and assoc capability,
1506 * ieee80211_set_associated() will tell the driver */
1507 bss_conf->aid = aid;
1508 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1509 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1510
d524215f
FF		 1511 /*
1512 * If we're using 4-addr mode, let the AP know that we're
1513 * doing so, so that it can create the STA VLAN on its side
1514 */
1515 if (ifmgd->use_4addr)
1516 ieee80211_send_4addr_nullfunc(local, sdata);
1517
15b7b062 1518 /*
b291ba11
JB		 1519 * Start timer to probe the connection to the AP now.
1520 * Also start the timer that will detect beacon loss.
15b7b062 1521 */
b291ba11 1522 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1523 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1524
af6b6374 1525 return true;
f0706e82
JB		 1526}
1527
1528
98c8fccf
JB		 1529static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1530 struct ieee80211_mgmt *mgmt,
1531 size_t len,
1532 struct ieee80211_rx_status *rx_status,
1533 struct ieee802_11_elems *elems,
1534 bool beacon)
1535{
1536 struct ieee80211_local *local = sdata->local;
1537 int freq;
c2b13452 1538 struct ieee80211_bss *bss;
98c8fccf 1539 struct ieee80211_channel *channel;
56007a02
JB		 1540 bool need_ps = false;
1541
1542 if (sdata->u.mgd.associated) {
1543 bss = (void *)sdata->u.mgd.associated->priv;
1544 /* not previously set so we may need to recalc */
1545 need_ps = !bss->dtim_period;
1546 }
98c8fccf
JB		 1547
1548 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1549 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1550 rx_status->band);
98c8fccf
JB		 1551 else
1552 freq = rx_status->freq;
1553
1554 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1555
1556 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1557 return;
1558
98c8fccf 1559 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1560 channel, beacon);
77fdaa12
JB		 1561 if (bss)
1562 ieee80211_rx_bss_put(local, bss);
1563
1564 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1565 return;
1566
56007a02
JB		 1567 if (need_ps) {
1568 mutex_lock(&local->iflist_mtx);
1569 ieee80211_recalc_ps(local, -1);
1570 mutex_unlock(&local->iflist_mtx);
1571 }
1572
c481ec97 1573 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1574 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1575 ETH_ALEN) == 0)) {
c481ec97
S		 1576 struct ieee80211_channel_sw_ie *sw_elem =
1577 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1578 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1579 bss, rx_status->mactime);
c481ec97 1580 }
f0706e82
JB		 1581}
1582
1583
f698d856 1584static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1585 struct sk_buff *skb)
f0706e82 1586{
af6b6374 1587 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1588 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1589 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1590 size_t baselen, len = skb->len;
ae6a44e3
EK		 1591 struct ieee802_11_elems elems;
1592
15b7b062
KV		 1593 ifmgd = &sdata->u.mgd;
1594
77fdaa12
JB		 1595 ASSERT_MGD_MTX(ifmgd);
1596
47846c9b 1597 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1598 return; /* ignore ProbeResp to foreign address */
1599
ae6a44e3
EK		 1600 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1601 if (baselen > len)
1602 return;
1603
1604 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1605 &elems);
1606
98c8fccf 1607 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1608
77fdaa12 1609 if (ifmgd->associated &&
4e5ff376
FF		 1610 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1611 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1612}
1613
d91f36db
JB		 1614/*
1615 * This is the canonical list of information elements we care about,
1616 * the filter code also gives us all changes to the Microsoft OUI
1617 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1618 *
1619 * We implement beacon filtering in software since that means we can
1620 * avoid processing the frame here and in cfg80211, and userspace
1621 * will not be able to tell whether the hardware supports it or not.
1622 *
1623 * XXX: This list needs to be dynamic -- userspace needs to be able to
1624 * add items it requires. It also needs to be able to tell us to
1625 * look out for other vendor IEs.
1626 */
1627static const u64 care_about_ies =
1d4df3a5
JB		 1628 (1ULL << WLAN_EID_COUNTRY) |
1629 (1ULL << WLAN_EID_ERP_INFO) |
1630 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1631 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1632 (1ULL << WLAN_EID_HT_CAPABILITY) |
1633 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1634
f698d856 1635static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1636 struct ieee80211_mgmt *mgmt,
1637 size_t len,
1638 struct ieee80211_rx_status *rx_status)
1639{
d91f36db 1640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1641 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1642 size_t baselen;
1643 struct ieee802_11_elems elems;
f698d856 1644 struct ieee80211_local *local = sdata->local;
471b3efd 1645 u32 changed = 0;
d91f36db 1646 bool erp_valid, directed_tim = false;
7a5158ef 1647 u8 erp_value = 0;
d91f36db 1648 u32 ncrc;
77fdaa12
JB		 1649 u8 *bssid;
1650
1651 ASSERT_MGD_MTX(ifmgd);
f0706e82 1652
ae6a44e3
EK		 1653 /* Process beacon from the current BSS */
1654 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1655 if (baselen > len)
1656 return;
1657
d91f36db 1658 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1659 return;
f0706e82 1660
b291ba11
JB		 1661 /*
1662 * We might have received a number of frames, among them a
1663 * disassoc frame and a beacon...
1664 */
1665 if (!ifmgd->associated)
77fdaa12
JB		 1666 return;
1667
0c1ad2ca 1668 bssid = ifmgd->associated->bssid;
77fdaa12 1669
b291ba11
JB		 1670 /*
1671 * And in theory even frames from a different AP we were just
1672 * associated to a split-second ago!
1673 */
1674 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1675 return;
1676
17e4ec14
JM		 1677 /* Track average RSSI from the Beacon frames of the current AP */
1678 ifmgd->last_beacon_signal = rx_status->signal;
1679 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1680 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1681 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1682 ifmgd->last_cqm_event_signal = 0;
391a200a 1683 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1684 } else {
1685 ifmgd->ave_beacon_signal =
1686 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1687 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1688 ifmgd->ave_beacon_signal) / 16;
391a200a 1689 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1690 }
1691 if (bss_conf->cqm_rssi_thold &&
391a200a 1692 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1693 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1694 int sig = ifmgd->ave_beacon_signal / 16;
1695 int last_event = ifmgd->last_cqm_event_signal;
1696 int thold = bss_conf->cqm_rssi_thold;
1697 int hyst = bss_conf->cqm_rssi_hyst;
1698 if (sig < thold &&
1699 (last_event == 0 || sig < last_event - hyst)) {
1700 ifmgd->last_cqm_event_signal = sig;
1701 ieee80211_cqm_rssi_notify(
1702 &sdata->vif,
1703 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1704 GFP_KERNEL);
1705 } else if (sig > thold &&
1706 (last_event == 0 || sig > last_event + hyst)) {
1707 ifmgd->last_cqm_event_signal = sig;
1708 ieee80211_cqm_rssi_notify(
1709 &sdata->vif,
1710 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1711 GFP_KERNEL);
1712 }
1713 }
1714
b291ba11 1715 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1716#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1717 if (net_ratelimit()) {
1718 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1719 "to a received beacon\n", sdata->name);
92778180
JM		 1720 }
1721#endif
b291ba11 1722 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1723 mutex_lock(&local->iflist_mtx);
1724 ieee80211_recalc_ps(local, -1);
1725 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1726 }
1727
b291ba11
JB		 1728 /*
1729 * Push the beacon loss detection into the future since
1730 * we are processing a beacon from the AP just now.
1731 */
d3a910a8 1732 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1733
d91f36db
JB		 1734 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1735 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1736 len - baselen, &elems,
1737 care_about_ies, ncrc);
1738
1739 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1740 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1741 ifmgd->aid);
d91f36db 1742
d8ec4433 1743 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1744 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1745 true);
d91f36db 1746
4ced3f74 1747 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1748 elems.wmm_param_len);
1749 }
fe3fa827 1750
25c9c875 1751 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1752 if (directed_tim) {
572e0012
KV		 1753 if (local->hw.conf.dynamic_ps_timeout > 0) {
1754 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1755 ieee80211_hw_config(local,
1756 IEEE80211_CONF_CHANGE_PS);
1757 ieee80211_send_nullfunc(local, sdata, 0);
1758 } else {
1759 local->pspolling = true;
1760
1761 /*
1762 * Here is assumed that the driver will be
1763 * able to send ps-poll frame and receive a
1764 * response even though power save mode is
1765 * enabled, but some drivers might require
1766 * to disable power save here. This needs
1767 * to be investigated.
1768 */
1769 ieee80211_send_pspoll(local, sdata);
1770 }
a97b77b9
VN		 1771 }
1772 }
7a5158ef 1773
d8ec4433 1774 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1775 return;
1776 ifmgd->beacon_crc = ncrc;
d8ec4433 1777 ifmgd->beacon_crc_valid = true;
30196673 1778
7a5158ef
JB		 1779 if (elems.erp_info && elems.erp_info_len >= 1) {
1780 erp_valid = true;
1781 erp_value = elems.erp_info[0];
1782 } else {
1783 erp_valid = false;
50c4afb9 1784 }
7a5158ef
JB		 1785 changed |= ieee80211_handle_bss_capability(sdata,
1786 le16_to_cpu(mgmt->u.beacon.capab_info),
1787 erp_valid, erp_value);
f0706e82 1788
d3c990fb 1789
53d6f81c 1790 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1791 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1792 struct sta_info *sta;
1793 struct ieee80211_supported_band *sband;
1794 u16 ap_ht_cap_flags;
1795
1796 rcu_read_lock();
1797
abe60632 1798 sta = sta_info_get(sdata, bssid);
77fdaa12 1799 if (WARN_ON(!sta)) {
ae5eb026
JB		 1800 rcu_read_unlock();
1801 return;
1802 }
1803
1804 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1805
1806 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1807 elems.ht_cap_elem, &sta->sta.ht_cap);
1808
1809 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1810
1811 rcu_read_unlock();
1812
1813 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1814 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1815 }
1816
8b19e6ca 1817 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1818 if (elems.country_elem) {
a8302de9
VT		 1819 /* TODO: IBSS also needs this */
1820 if (elems.pwr_constr_elem)
1821 ieee80211_handle_pwr_constr(sdata,
1822 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1823 elems.pwr_constr_elem,
1824 elems.pwr_constr_elem_len);
3f2355cb
LR		 1825 }
1826
471b3efd 1827 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1828}
1829
1fa57d01
JB		 1830void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1831 struct sk_buff *skb)
f0706e82 1832{
77fdaa12 1833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1834 struct ieee80211_rx_status *rx_status;
f0706e82 1835 struct ieee80211_mgmt *mgmt;
77fdaa12 1836 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1837 u16 fc;
1838
f0706e82
JB		 1839 rx_status = (struct ieee80211_rx_status *) skb->cb;
1840 mgmt = (struct ieee80211_mgmt *) skb->data;
1841 fc = le16_to_cpu(mgmt->frame_control);
1842
77fdaa12
JB		 1843 mutex_lock(&ifmgd->mtx);
1844
1845 if (ifmgd->associated &&
0c1ad2ca 1846 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1847 switch (fc & IEEE80211_FCTL_STYPE) {
1848 case IEEE80211_STYPE_BEACON:
1849 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1850 rx_status);
1851 break;
1852 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1853 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1854 break;
1855 case IEEE80211_STYPE_DEAUTH:
63f170e0 1856 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1857 break;
1858 case IEEE80211_STYPE_DISASSOC:
1859 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1860 break;
1861 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1862 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1863 case WLAN_CATEGORY_SPECTRUM_MGMT:
1864 ieee80211_sta_process_chanswitch(sdata,
1865 &mgmt->u.action.u.chan_switch.sw_elem,
1866 (void *)ifmgd->associated->priv,
1867 rx_status->mactime);
1868 break;
1869 }
77fdaa12
JB		 1870 }
1871 mutex_unlock(&ifmgd->mtx);
1872
1873 switch (rma) {
1874 case RX_MGMT_NONE:
1875 /* no action */
1876 break;
1877 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1878 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1879 break;
1880 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1881 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1882 break;
1883 default:
1884 WARN(1, "unexpected: %d", rma);
1885 }
36b3a628 1886 return;
77fdaa12
JB		 1887 }
1888
77fdaa12
JB		 1889 mutex_unlock(&ifmgd->mtx);
1890
63f170e0 1891 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1892 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1893 struct ieee80211_local *local = sdata->local;
1894 struct ieee80211_work *wk;
1895
a1699b75 1896 mutex_lock(&local->mtx);
b054b747
JB		 1897 list_for_each_entry(wk, &local->work_list, list) {
1898 if (wk->sdata != sdata)
1899 continue;
1900
e5b900d2
JB		 1901 if (wk->type != IEEE80211_WORK_ASSOC &&
1902 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1903 continue;
1904
1905 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1906 continue;
1907 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1908 continue;
1909
1910 /*
1911 * Printing the message only here means we can't
1912 * spuriously print it, but it also means that it
1913 * won't be printed when the frame comes in before
1914 * we even tried to associate or in similar cases.
1915 *
1916 * Ultimately, I suspect cfg80211 should print the
1917 * messages instead.
1918 */
1919 printk(KERN_DEBUG
1920 "%s: deauthenticated from %pM (Reason: %u)\n",
1921 sdata->name, mgmt->bssid,
1922 le16_to_cpu(mgmt->u.deauth.reason_code));
1923
1924 list_del_rcu(&wk->list);
1925 free_work(wk);
1926 break;
1927 }
a1699b75 1928 mutex_unlock(&local->mtx);
f0706e82 1929
ce470613 1930 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1931 }
f0706e82
JB		 1932}
1933
9c6bd790 1934static void ieee80211_sta_timer(unsigned long data)
f0706e82 1935{
60f8b39c
JB		 1936 struct ieee80211_sub_if_data *sdata =
1937 (struct ieee80211_sub_if_data *) data;
46900298 1938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1939 struct ieee80211_local *local = sdata->local;
f0706e82 1940
5bb644a0
JB		 1941 if (local->quiescing) {
1942 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1943 return;
1944 }
1945
64592c8f 1946 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1947}
1948
04ac3c0e
FF		 1949static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1950 u8 *bssid)
1951{
1952 struct ieee80211_local *local = sdata->local;
1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954
1955 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1956 IEEE80211_STA_BEACON_POLL);
1957
1958 ieee80211_set_disassoc(sdata, true, true);
1959 mutex_unlock(&ifmgd->mtx);
1960 mutex_lock(&local->mtx);
1961 ieee80211_recalc_idle(local);
1962 mutex_unlock(&local->mtx);
1963 /*
1964 * must be outside lock due to cfg80211,
1965 * but that's not a problem.
1966 */
1967 ieee80211_send_deauth_disassoc(sdata, bssid,
1968 IEEE80211_STYPE_DEAUTH,
1969 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1970 NULL, true);
1971 mutex_lock(&ifmgd->mtx);
1972}
1973
1fa57d01 1974void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1975{
9c6bd790 1976 struct ieee80211_local *local = sdata->local;
1fa57d01 1977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1978
77fdaa12
JB		 1979 /* then process the rest of the work */
1980 mutex_lock(&ifmgd->mtx);
1981
b291ba11
JB		 1982 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1983 IEEE80211_STA_CONNECTION_POLL) &&
1984 ifmgd->associated) {
a43abf29 1985 u8 bssid[ETH_ALEN];
72a8a3ed 1986 int max_tries;
a43abf29 1987
0c1ad2ca 1988 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 1989
72a8a3ed
FF		 1990 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1991 max_tries = IEEE80211_MAX_NULLFUNC_TRIES;
1992 else
1993 max_tries = IEEE80211_MAX_PROBE_TRIES;
1994
4e5ff376
FF		 1995 /* ACK received for nullfunc probing frame */
1996 if (!ifmgd->probe_send_count)
1997 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 1998 else if (ifmgd->nullfunc_failed) {
1999 if (ifmgd->probe_send_count < max_tries) {
2000#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2001 wiphy_debug(local->hw.wiphy,
2002 "%s: No ack for nullfunc frame to"
bfc31df3 2003 " AP %pM, try %d/%i\n",
04ac3c0e 2004 sdata->name, bssid,
bfc31df3 2005 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2006#endif
2007 ieee80211_mgd_probe_ap_send(sdata);
2008 } else {
2009#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2010 wiphy_debug(local->hw.wiphy,
2011 "%s: No ack for nullfunc frame to"
2012 " AP %pM, disconnecting.\n",
c658e5db 2013 sdata->name, bssid);
04ac3c0e
FF		 2014#endif
2015 ieee80211_sta_connection_lost(sdata, bssid);
2016 }
2017 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2018 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2019 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2020#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2021 wiphy_debug(local->hw.wiphy,
2022 "%s: Failed to send nullfunc to AP %pM"
2023 " after %dms, disconnecting.\n",
2024 sdata->name,
2025 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2026#endif
2027 ieee80211_sta_connection_lost(sdata, bssid);
2028 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2029#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2030 wiphy_debug(local->hw.wiphy,
2031 "%s: No probe response from AP %pM"
bfc31df3 2032 " after %dms, try %d/%i\n",
b38afa87
BG		 2033 sdata->name,
2034 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ,
bfc31df3 2035 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2036#endif
2037 ieee80211_mgd_probe_ap_send(sdata);
2038 } else {
b291ba11
JB		 2039 /*
2040 * We actually lost the connection ... or did we?
2041 * Let's make sure!
2042 */
b38afa87
BG		 2043 wiphy_debug(local->hw.wiphy,
2044 "%s: No probe response from AP %pM"
2045 " after %dms, disconnecting.\n",
2046 sdata->name,
2047 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
04ac3c0e
FF		 2048
2049 ieee80211_sta_connection_lost(sdata, bssid);
b291ba11
JB		 2050 }
2051 }
2052
77fdaa12 2053 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2054}
2055
b291ba11
JB		 2056static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2057{
2058 struct ieee80211_sub_if_data *sdata =
2059 (struct ieee80211_sub_if_data *) data;
2060 struct ieee80211_local *local = sdata->local;
2061
2062 if (local->quiescing)
2063 return;
2064
1e4dcd01
JO		 2065 ieee80211_queue_work(&sdata->local->hw,
2066 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2067}
2068
2069static void ieee80211_sta_conn_mon_timer(unsigned long data)
2070{
2071 struct ieee80211_sub_if_data *sdata =
2072 (struct ieee80211_sub_if_data *) data;
2073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2074 struct ieee80211_local *local = sdata->local;
2075
2076 if (local->quiescing)
2077 return;
2078
42935eca 2079 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2080}
2081
2082static void ieee80211_sta_monitor_work(struct work_struct *work)
2083{
2084 struct ieee80211_sub_if_data *sdata =
2085 container_of(work, struct ieee80211_sub_if_data,
2086 u.mgd.monitor_work);
2087
2088 ieee80211_mgd_probe_ap(sdata, false);
2089}
2090
9c6bd790
JB		 2091static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2092{
ad935687 2093 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2094 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2095 IEEE80211_STA_CONNECTION_POLL);
ad935687 2096
b291ba11 2097 /* let's probe the connection once */
42935eca 2098 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2099 &sdata->u.mgd.monitor_work);
2100 /* and do all the other regular work too */
64592c8f 2101 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2102 }
9c6bd790 2103}
f0706e82 2104
5bb644a0
JB		 2105#ifdef CONFIG_PM
2106void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2107{
2108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2109
2110 /*
2111 * we need to use atomic bitops for the running bits
2112 * only because both timers might fire at the same
2113 * time -- the code here is properly synchronised.
2114 */
2115
d1f5b7a3
JB		 2116 cancel_work_sync(&ifmgd->request_smps_work);
2117
1e4dcd01 2118 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2119 if (del_timer_sync(&ifmgd->timer))
2120 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2121
2122 cancel_work_sync(&ifmgd->chswitch_work);
2123 if (del_timer_sync(&ifmgd->chswitch_timer))
2124 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2125
2126 cancel_work_sync(&ifmgd->monitor_work);
2127 /* these will just be re-established on connection */
2128 del_timer_sync(&ifmgd->conn_mon_timer);
2129 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2130}
2131
2132void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2133{
2134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2135
2136 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2137 add_timer(&ifmgd->timer);
2138 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2139 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2140 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2141 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2142}
2143#endif
2144
9c6bd790
JB		 2145/* interface setup */
2146void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2147{
46900298 2148 struct ieee80211_if_managed *ifmgd;
988c0f72 2149
46900298 2150 ifmgd = &sdata->u.mgd;
b291ba11 2151 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2152 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2153 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2154 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2155 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2156 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2157 (unsigned long) sdata);
b291ba11
JB		 2158 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2159 (unsigned long) sdata);
2160 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2161 (unsigned long) sdata);
46900298 2162 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2163 (unsigned long) sdata);
9c6bd790 2164
ab1faead 2165 ifmgd->flags = 0;
bbbdff9e 2166
77fdaa12 2167 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2168
2169 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2170 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2171 else
2172 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2173}
2174
77fdaa12
JB		 2175/* scan finished notification */
2176void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2177{
77fdaa12 2178 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2179
77fdaa12
JB		 2180 /* Restart STA timers */
2181 rcu_read_lock();
2182 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2183 ieee80211_restart_sta_timer(sdata);
2184 rcu_read_unlock();
2185}
60f8b39c 2186
77fdaa12
JB		 2187int ieee80211_max_network_latency(struct notifier_block *nb,
2188 unsigned long data, void *dummy)
2189{
2190 s32 latency_usec = (s32) data;
2191 struct ieee80211_local *local =
2192 container_of(nb, struct ieee80211_local,
2193 network_latency_notifier);
1fa6f4af 2194
77fdaa12
JB		 2195 mutex_lock(&local->iflist_mtx);
2196 ieee80211_recalc_ps(local, latency_usec);
2197 mutex_unlock(&local->iflist_mtx);
dfe67012 2198
77fdaa12 2199 return 0;
9c6bd790
JB		 2200}
2201
77fdaa12 2202/* config hooks */
af6b6374
JB		 2203static enum work_done_result
2204ieee80211_probe_auth_done(struct ieee80211_work *wk,
2205 struct sk_buff *skb)
2206{
2207 if (!skb) {
2208 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2209 return WORK_DONE_DESTROY;
2210 }
2211
2212 if (wk->type == IEEE80211_WORK_AUTH) {
2213 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2214 return WORK_DONE_DESTROY;
2215 }
2216
2217 mutex_lock(&wk->sdata->u.mgd.mtx);
2218 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2219 mutex_unlock(&wk->sdata->u.mgd.mtx);
2220
2221 wk->type = IEEE80211_WORK_AUTH;
2222 wk->probe_auth.tries = 0;
2223 return WORK_DONE_REQUEUE;
2224}
2225
77fdaa12
JB		 2226int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2227 struct cfg80211_auth_request *req)
9c6bd790 2228{
77fdaa12 2229 const u8 *ssid;
f679f65d 2230 struct ieee80211_work *wk;
77fdaa12 2231 u16 auth_alg;
9c6bd790 2232
d5cdfacb
JM		 2233 if (req->local_state_change)
2234 return 0; /* no need to update mac80211 state */
2235
77fdaa12
JB		 2236 switch (req->auth_type) {
2237 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2238 auth_alg = WLAN_AUTH_OPEN;
2239 break;
2240 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2241 if (IS_ERR(sdata->local->wep_tx_tfm))
2242 return -EOPNOTSUPP;
77fdaa12
JB		 2243 auth_alg = WLAN_AUTH_SHARED_KEY;
2244 break;
2245 case NL80211_AUTHTYPE_FT:
2246 auth_alg = WLAN_AUTH_FT;
2247 break;
2248 case NL80211_AUTHTYPE_NETWORK_EAP:
2249 auth_alg = WLAN_AUTH_LEAP;
2250 break;
2251 default:
2252 return -EOPNOTSUPP;
60f8b39c 2253 }
77fdaa12
JB		 2254
2255 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2256 if (!wk)
9c6bd790 2257 return -ENOMEM;
77fdaa12 2258
5e124bd5 2259 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2260
2261 if (req->ie && req->ie_len) {
2262 memcpy(wk->ie, req->ie, req->ie_len);
2263 wk->ie_len = req->ie_len;
9c6bd790 2264 }
77fdaa12 2265
fffd0934 2266 if (req->key && req->key_len) {
af6b6374
JB		 2267 wk->probe_auth.key_len = req->key_len;
2268 wk->probe_auth.key_idx = req->key_idx;
2269 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2270 }
2271
77fdaa12 2272 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2273 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2274 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2275
af6b6374
JB		 2276 wk->probe_auth.algorithm = auth_alg;
2277 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2278
070bb547
JB		 2279 /* if we already have a probe, don't probe again */
2280 if (req->bss->proberesp_ies)
2281 wk->type = IEEE80211_WORK_AUTH;
2282 else
2283 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2284 wk->chan = req->bss->channel;
af6b6374
JB		 2285 wk->sdata = sdata;
2286 wk->done = ieee80211_probe_auth_done;
77fdaa12 2287
af6b6374 2288 ieee80211_add_work(wk);
9c6bd790 2289 return 0;
60f8b39c
JB		 2290}
2291
af6b6374
JB		 2292static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2293 struct sk_buff *skb)
2294{
2295 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2296 struct ieee80211_rx_status *rx_status;
2297 struct ieee802_11_elems elems;
af6b6374
JB		 2298 u16 status;
2299
2300 if (!skb) {
2301 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2302 return WORK_DONE_DESTROY;
2303 }
2304
e5b900d2
JB		 2305 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2306 mutex_lock(&wk->sdata->u.mgd.mtx);
2307 rx_status = (void *) skb->cb;
2308 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2309 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2310 &elems, true);
2311 mutex_unlock(&wk->sdata->u.mgd.mtx);
2312
2313 wk->type = IEEE80211_WORK_ASSOC;
2314 /* not really done yet */
2315 return WORK_DONE_REQUEUE;
2316 }
2317
af6b6374
JB		 2318 mgmt = (void *)skb->data;
2319 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2320
2321 if (status == WLAN_STATUS_SUCCESS) {
2322 mutex_lock(&wk->sdata->u.mgd.mtx);
2323 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2324 mutex_unlock(&wk->sdata->u.mgd.mtx);
2325 /* oops -- internal error -- send timeout for now */
2326 cfg80211_send_assoc_timeout(wk->sdata->dev,
2327 wk->filter_ta);
2328 return WORK_DONE_DESTROY;
2329 }
68542962
JO		 2330
2331 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2332 }
2333
2334 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2335 return WORK_DONE_DESTROY;
2336}
2337
77fdaa12
JB		 2338int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2339 struct cfg80211_assoc_request *req)
f0706e82 2340{
77fdaa12 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2342 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2343 struct ieee80211_work *wk;
63f170e0 2344 const u8 *ssid;
af6b6374 2345 int i;
f0706e82 2346
77fdaa12 2347 mutex_lock(&ifmgd->mtx);
af6b6374 2348 if (ifmgd->associated) {
9c87ba67
JM		 2349 if (!req->prev_bssid ||
2350 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2351 ETH_ALEN)) {
2352 /*
2353 * We are already associated and the request was not a
2354 * reassociation request from the current BSS, so
2355 * reject it.
2356 */
2357 mutex_unlock(&ifmgd->mtx);
2358 return -EALREADY;
2359 }
2360
2361 /* Trying to reassociate - clear previous association state */
53f73c09 2362 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2363 }
2364 mutex_unlock(&ifmgd->mtx);
77fdaa12 2365
63f170e0 2366 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2367 if (!wk)
2368 return -ENOMEM;
77fdaa12 2369
77fdaa12 2370 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2371 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2372
d8ec4433
JO		 2373 ifmgd->beacon_crc_valid = false;
2374
77fdaa12
JB		 2375 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2376 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2377 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2378 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2379 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2380
77fdaa12
JB		 2381
2382 if (req->ie && req->ie_len) {
2383 memcpy(wk->ie, req->ie, req->ie_len);
2384 wk->ie_len = req->ie_len;
2385 } else
2386 wk->ie_len = 0;
2387
0c1ad2ca 2388 wk->assoc.bss = req->bss;
f679f65d 2389
af6b6374 2390 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2391
af6b6374
JB		 2392 /* new association always uses requested smps mode */
2393 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2394 if (ifmgd->powersave)
2395 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2396 else
2397 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2398 } else
2399 ifmgd->ap_smps = ifmgd->req_smps;
2400
2401 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2402 /*
2403 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2404 * We still associate in non-HT mode (11a/b/g) if any one of these
2405 * ciphers is configured as pairwise.
2406 * We can set this to true for non-11n hardware, that'll be checked
2407 * separately along with the peer capabilities.
2408 */
af6b6374 2409 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2410 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2411 wk->assoc.wmm_used = bss->wmm_used;
2412 wk->assoc.supp_rates = bss->supp_rates;
2413 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2414 wk->assoc.ht_information_ie =
2415 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2416
ab13315a
KV		 2417 if (bss->wmm_used && bss->uapsd_supported &&
2418 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2419 wk->assoc.uapsd_used = true;
2420 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2421 } else {
2422 wk->assoc.uapsd_used = false;
2423 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2424 }
2425
63f170e0 2426 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2427 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2428 wk->assoc.ssid_len = ssid[1];
63f170e0 2429
77fdaa12 2430 if (req->prev_bssid)
f679f65d 2431 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2432
f679f65d 2433 wk->chan = req->bss->channel;
af6b6374
JB		 2434 wk->sdata = sdata;
2435 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2436 if (!bss->dtim_period &&
2437 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2438 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2439 else
2440 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2441
2442 if (req->use_mfp) {
2443 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2444 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2445 } else {
2446 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2447 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2448 }
2449
2450 if (req->crypto.control_port)
2451 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2452 else
2453 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2454
a621fa4d
JB		 2455 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2456 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2457
af6b6374
JB		 2458 ieee80211_add_work(wk);
2459 return 0;
f0706e82
JB		 2460}
2461
77fdaa12 2462int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2463 struct cfg80211_deauth_request *req,
2464 void *cookie)
f0706e82 2465{
af6b6374 2466 struct ieee80211_local *local = sdata->local;
46900298 2467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2468 struct ieee80211_work *wk;
05e48e8e
JM		 2469 u8 bssid[ETH_ALEN];
2470 bool assoc_bss = false;
f0706e82 2471
77fdaa12
JB		 2472 mutex_lock(&ifmgd->mtx);
2473
05e48e8e 2474 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2475 if (ifmgd->associated == req->bss) {
53f73c09 2476 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2477 mutex_unlock(&ifmgd->mtx);
05e48e8e 2478 assoc_bss = true;
af6b6374
JB		 2479 } else {
2480 bool not_auth_yet = false;
f0706e82 2481
a58ce43f 2482 mutex_unlock(&ifmgd->mtx);
a58ce43f 2483
a1699b75 2484 mutex_lock(&local->mtx);
af6b6374 2485 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2486 if (wk->sdata != sdata)
af6b6374 2487 continue;
29165e4c
JB		 2488
2489 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2490 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2491 wk->type != IEEE80211_WORK_ASSOC &&
2492 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2493 continue;
2494
af6b6374
JB		 2495 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2496 continue;
29165e4c
JB		 2497
2498 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2499 list_del_rcu(&wk->list);
af6b6374
JB		 2500 free_work(wk);
2501 break;
2502 }
a1699b75 2503 mutex_unlock(&local->mtx);
af6b6374
JB		 2504
2505 /*
2506 * If somebody requests authentication and we haven't
2507 * sent out an auth frame yet there's no need to send
2508 * out a deauth frame either. If the state was PROBE,
2509 * then this is the case. If it's AUTH we have sent a
2510 * frame, and if it's IDLE we have completed the auth
2511 * process already.
2512 */
2513 if (not_auth_yet) {
2514 __cfg80211_auth_canceled(sdata->dev, bssid);
2515 return 0;
2516 }
2517 }
77fdaa12 2518
0ff71613 2519 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2520 sdata->name, bssid, req->reason_code);
0ff71613 2521
d5cdfacb
JM		 2522 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2523 req->reason_code, cookie,
2524 !req->local_state_change);
05e48e8e
JM		 2525 if (assoc_bss)
2526 sta_info_destroy_addr(sdata, bssid);
f0706e82 2527
7da7cc1d 2528 mutex_lock(&sdata->local->mtx);
bc83b681 2529 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2530 mutex_unlock(&sdata->local->mtx);
bc83b681 2531
f0706e82
JB		 2532 return 0;
2533}
84363e6e 2534
77fdaa12 2535int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2536 struct cfg80211_disassoc_request *req,
2537 void *cookie)
9c6bd790 2538{
77fdaa12 2539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2540 u8 bssid[ETH_ALEN];
9c6bd790 2541
77fdaa12 2542 mutex_lock(&ifmgd->mtx);
10f644a4 2543
8d8b261a
JB		 2544 /*
2545 * cfg80211 should catch this ... but it's racy since
2546 * we can receive a disassoc frame, process it, hand it
2547 * to cfg80211 while that's in a locked section already
2548 * trying to tell us that the user wants to disconnect.
2549 */
0c1ad2ca 2550 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2551 mutex_unlock(&ifmgd->mtx);
2552 return -ENOLINK;
2553 }
2554
0ff71613 2555 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2556 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2557
e69e95db 2558 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2559 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2560
2561 mutex_unlock(&ifmgd->mtx);
10f644a4 2562
77fdaa12 2563 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2564 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2565 cookie, !req->local_state_change);
e69e95db 2566 sta_info_destroy_addr(sdata, bssid);
bc83b681 2567
7da7cc1d 2568 mutex_lock(&sdata->local->mtx);
bc83b681 2569 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2570 mutex_unlock(&sdata->local->mtx);
bc83b681 2571
10f644a4
JB		 2572 return 0;
2573}
026331c4 2574
a97c13c3
JO		 2575void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2576 enum nl80211_cqm_rssi_threshold_event rssi_event,
2577 gfp_t gfp)
2578{
2579 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2580
b5878a2d
JB		 2581 trace_api_cqm_rssi_notify(sdata, rssi_event);
2582
a97c13c3
JO		 2583 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2584}
2585EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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