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mac80211: reject unhandled action frames
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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>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB
27#include "rate.h"
28#include "led.h"
f0706e82 29
a43abf29 30#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB
31
32/*
33 * beacon loss detection timeout
34 * XXX: should depend on beacon interval
35 */
36#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
37/*
38 * Time the connection can be idle before we probe
39 * it to see if we can still talk to the AP.
40 */
d1c5091f 41#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB
42/*
43 * Time we wait for a probe response after sending
44 * a probe request because of beacon loss or for
45 * checking the connection still works.
46 */
d1c5091f 47#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 48
5bb644a0
JB
49#define TMR_RUNNING_TIMER 0
50#define TMR_RUNNING_CHANSW 1
51
77fdaa12
JB
52/*
53 * All cfg80211 functions have to be called outside a locked
54 * section so that they can acquire a lock themselves... This
55 * is much simpler than queuing up things in cfg80211, but we
56 * do need some indirection for that here.
57 */
58enum rx_mgmt_action {
59 /* no action required */
60 RX_MGMT_NONE,
61
62 /* caller must call cfg80211_send_rx_auth() */
63 RX_MGMT_CFG80211_AUTH,
64
65 /* caller must call cfg80211_send_rx_assoc() */
66 RX_MGMT_CFG80211_ASSOC,
67
68 /* caller must call cfg80211_send_deauth() */
69 RX_MGMT_CFG80211_DEAUTH,
70
71 /* caller must call cfg80211_send_disassoc() */
72 RX_MGMT_CFG80211_DISASSOC,
73
5d1ec85f
JB
74 /* caller must tell cfg80211 about internal error */
75 RX_MGMT_CFG80211_ASSOC_ERROR,
77fdaa12
JB
76};
77
5484e237 78/* utils */
77fdaa12
JB
79static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
80{
81 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
82}
83
ca386f31
JB
84/*
85 * We can have multiple work items (and connection probing)
86 * scheduling this timer, but we need to take care to only
87 * reschedule it when it should fire _earlier_ than it was
88 * asked for before, or if it's not pending right now. This
89 * function ensures that. Note that it then is required to
90 * run this function for all timeouts after the first one
91 * has happened -- the work that runs from this timer will
92 * do that.
93 */
94static void run_again(struct ieee80211_if_managed *ifmgd,
95 unsigned long timeout)
96{
97 ASSERT_MGD_MTX(ifmgd);
98
99 if (!timer_pending(&ifmgd->timer) ||
100 time_before(timeout, ifmgd->timer.expires))
101 mod_timer(&ifmgd->timer, timeout);
102}
103
b291ba11
JB
104static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
105{
106 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
107 return;
108
109 mod_timer(&sdata->u.mgd.bcn_mon_timer,
110 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
111}
112
5484e237 113static int ecw2cw(int ecw)
60f8b39c 114{
5484e237 115 return (1 << ecw) - 1;
60f8b39c
JB
116}
117
d5522e03
JB
118/*
119 * ieee80211_enable_ht should be called only after the operating band
120 * has been determined as ht configuration depends on the hw's
121 * HT abilities for a specific band.
122 */
123static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
124 struct ieee80211_ht_info *hti,
77fdaa12 125 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB
126{
127 struct ieee80211_local *local = sdata->local;
128 struct ieee80211_supported_band *sband;
d5522e03
JB
129 struct sta_info *sta;
130 u32 changed = 0;
9ed6bcce 131 u16 ht_opmode;
d5522e03
JB
132 bool enable_ht = true, ht_changed;
133 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
134
135 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
136
d5522e03
JB
137 /* HT is not supported */
138 if (!sband->ht_cap.ht_supported)
139 enable_ht = false;
140
141 /* check that channel matches the right operating channel */
142 if (local->hw.conf.channel->center_freq !=
143 ieee80211_channel_to_frequency(hti->control_chan))
144 enable_ht = false;
145
146 if (enable_ht) {
147 channel_type = NL80211_CHAN_HT20;
148
149 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
150 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
151 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
152 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
153 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR
154 if (!(local->hw.conf.channel->flags &
155 IEEE80211_CHAN_NO_HT40PLUS))
156 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB
157 break;
158 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR
159 if (!(local->hw.conf.channel->flags &
160 IEEE80211_CHAN_NO_HT40MINUS))
161 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB
162 break;
163 }
164 }
165 }
166
167 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
168 channel_type != local->hw.conf.channel_type;
169
170 local->oper_channel_type = channel_type;
171
172 if (ht_changed) {
173 /* channel_type change automatically detected */
174 ieee80211_hw_config(local, 0);
175
176 rcu_read_lock();
abe60632 177 sta = sta_info_get(sdata, bssid);
d5522e03
JB
178 if (sta)
179 rate_control_rate_update(local, sband, sta,
180 IEEE80211_RC_HT_CHANGED);
d5522e03 181 rcu_read_unlock();
d5522e03
JB
182 }
183
184 /* disable HT */
185 if (!enable_ht)
186 return 0;
187
9ed6bcce 188 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB
189
190 /* if bss configuration changed store the new one */
413ad50a
JB
191 if (!sdata->ht_opmode_valid ||
192 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 193 changed |= BSS_CHANGED_HT;
9ed6bcce 194 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 195 sdata->ht_opmode_valid = true;
d5522e03
JB
196 }
197
198 return changed;
199}
200
9c6bd790
JB
201/* frame sending functions */
202
ef422bc0 203static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB
204 const u8 *bssid, u16 stype, u16 reason,
205 void *cookie)
9ac19a90
JB
206{
207 struct ieee80211_local *local = sdata->local;
46900298 208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB
209 struct sk_buff *skb;
210 struct ieee80211_mgmt *mgmt;
9aed3cc1 211
65fc73ac 212 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 213 if (!skb) {
ef422bc0 214 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 215 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB
216 return;
217 }
218 skb_reserve(skb, local->hw.extra_tx_headroom);
219
220 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
221 memset(mgmt, 0, 24);
77fdaa12 222 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 223 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 224 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 225 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 226 skb_put(skb, 2);
ef422bc0 227 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB
228 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
229
53b46b84 230 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS
231 if (cookie)
232 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
233 else
234 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 235 else
ce470613
HS
236 if (cookie)
237 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
238 else
239 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB
240 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
241 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
242 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB
243}
244
572e0012
KV
245void ieee80211_send_pspoll(struct ieee80211_local *local,
246 struct ieee80211_sub_if_data *sdata)
247{
572e0012
KV
248 struct ieee80211_pspoll *pspoll;
249 struct sk_buff *skb;
572e0012 250
d8cd189e
KV
251 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
252 if (!skb)
572e0012 253 return;
572e0012 254
d8cd189e
KV
255 pspoll = (struct ieee80211_pspoll *) skb->data;
256 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 257
62ae67be
JB
258 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
259 ieee80211_tx_skb(sdata, skb);
572e0012
KV
260}
261
965bedad
JB
262void ieee80211_send_nullfunc(struct ieee80211_local *local,
263 struct ieee80211_sub_if_data *sdata,
264 int powersave)
265{
266 struct sk_buff *skb;
d8cd189e 267 struct ieee80211_hdr_3addr *nullfunc;
965bedad 268
d8cd189e
KV
269 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
270 if (!skb)
965bedad 271 return;
965bedad 272
d8cd189e 273 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 274 if (powersave)
d8cd189e 275 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 276
62ae67be
JB
277 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
278 ieee80211_tx_skb(sdata, skb);
965bedad
JB
279}
280
d524215f
FF
281static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
282 struct ieee80211_sub_if_data *sdata)
283{
284 struct sk_buff *skb;
285 struct ieee80211_hdr *nullfunc;
286 __le16 fc;
287
288 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
289 return;
290
291 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
292 if (!skb) {
293 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
294 "nullfunc frame\n", sdata->name);
295 return;
296 }
297 skb_reserve(skb, local->hw.extra_tx_headroom);
298
299 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
300 memset(nullfunc, 0, 30);
301 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
302 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
303 nullfunc->frame_control = fc;
304 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
305 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
306 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
307 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
308
309 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
310 ieee80211_tx_skb(sdata, skb);
311}
312
cc32abd4
JB
313/* spectrum management related things */
314static void ieee80211_chswitch_work(struct work_struct *work)
315{
316 struct ieee80211_sub_if_data *sdata =
317 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB
318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
319
9607e6b6 320 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB
321 return;
322
77fdaa12
JB
323 mutex_lock(&ifmgd->mtx);
324 if (!ifmgd->associated)
325 goto out;
cc32abd4
JB
326
327 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB
328 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
329
cc32abd4 330 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 331 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 332
cc32abd4
JB
333 ieee80211_wake_queues_by_reason(&sdata->local->hw,
334 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB
335 out:
336 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
337 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB
338}
339
340static void ieee80211_chswitch_timer(unsigned long data)
341{
342 struct ieee80211_sub_if_data *sdata =
343 (struct ieee80211_sub_if_data *) data;
344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
345
5bb644a0
JB
346 if (sdata->local->quiescing) {
347 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
348 return;
349 }
350
42935eca 351 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB
352}
353
354void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
355 struct ieee80211_channel_sw_ie *sw_elem,
356 struct ieee80211_bss *bss)
357{
0c1ad2ca
JB
358 struct cfg80211_bss *cbss =
359 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB
360 struct ieee80211_channel *new_ch;
361 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
362 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
363
77fdaa12
JB
364 ASSERT_MGD_MTX(ifmgd);
365
366 if (!ifmgd->associated)
cc32abd4
JB
367 return;
368
fbe9c429 369 if (sdata->local->scanning)
cc32abd4
JB
370 return;
371
372 /* Disregard subsequent beacons if we are already running a timer
373 processing a CSA */
374
375 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
376 return;
377
378 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
379 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
380 return;
381
382 sdata->local->csa_channel = new_ch;
383
384 if (sw_elem->count <= 1) {
42935eca 385 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB
386 } else {
387 ieee80211_stop_queues_by_reason(&sdata->local->hw,
388 IEEE80211_QUEUE_STOP_REASON_CSA);
389 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
390 mod_timer(&ifmgd->chswitch_timer,
391 jiffies +
392 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 393 cbss->beacon_interval));
cc32abd4
JB
394 }
395}
396
397static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
398 u16 capab_info, u8 *pwr_constr_elem,
399 u8 pwr_constr_elem_len)
400{
401 struct ieee80211_conf *conf = &sdata->local->hw.conf;
402
403 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
404 return;
405
406 /* Power constraint IE length should be 1 octet */
407 if (pwr_constr_elem_len != 1)
408 return;
409
410 if ((*pwr_constr_elem <= conf->channel->max_power) &&
411 (*pwr_constr_elem != sdata->local->power_constr_level)) {
412 sdata->local->power_constr_level = *pwr_constr_elem;
413 ieee80211_hw_config(sdata->local, 0);
414 }
415}
416
965bedad
JB
417/* powersave */
418static void ieee80211_enable_ps(struct ieee80211_local *local,
419 struct ieee80211_sub_if_data *sdata)
420{
421 struct ieee80211_conf *conf = &local->hw.conf;
422
d5edaedc
JB
423 /*
424 * If we are scanning right now then the parameters will
425 * take effect when scan finishes.
426 */
fbe9c429 427 if (local->scanning)
d5edaedc
JB
428 return;
429
965bedad
JB
430 if (conf->dynamic_ps_timeout > 0 &&
431 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
432 mod_timer(&local->dynamic_ps_timer, jiffies +
433 msecs_to_jiffies(conf->dynamic_ps_timeout));
434 } else {
435 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
436 ieee80211_send_nullfunc(local, sdata, 1);
375177bf
VN
437
438 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
439 conf->flags |= IEEE80211_CONF_PS;
440 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
441 }
965bedad
JB
442 }
443}
444
445static void ieee80211_change_ps(struct ieee80211_local *local)
446{
447 struct ieee80211_conf *conf = &local->hw.conf;
448
449 if (local->ps_sdata) {
965bedad
JB
450 ieee80211_enable_ps(local, local->ps_sdata);
451 } else if (conf->flags & IEEE80211_CONF_PS) {
452 conf->flags &= ~IEEE80211_CONF_PS;
453 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
454 del_timer_sync(&local->dynamic_ps_timer);
455 cancel_work_sync(&local->dynamic_ps_enable_work);
456 }
457}
458
459/* need to hold RTNL or interface lock */
10f644a4 460void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB
461{
462 struct ieee80211_sub_if_data *sdata, *found = NULL;
463 int count = 0;
464
465 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
466 local->ps_sdata = NULL;
467 return;
468 }
469
af6b6374
JB
470 if (!list_empty(&local->work_list)) {
471 local->ps_sdata = NULL;
472 goto change;
473 }
474
965bedad 475 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 476 if (!ieee80211_sdata_running(sdata))
965bedad
JB
477 continue;
478 if (sdata->vif.type != NL80211_IFTYPE_STATION)
479 continue;
480 found = sdata;
481 count++;
482 }
483
43f78531 484 if (count == 1 && found->u.mgd.powersave &&
af6b6374 485 found->u.mgd.associated &&
56007a02 486 found->u.mgd.associated->beacon_ies &&
b291ba11
JB
487 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
488 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB
489 s32 beaconint_us;
490
491 if (latency < 0)
492 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
493
494 beaconint_us = ieee80211_tu_to_usec(
495 found->vif.bss_conf.beacon_int);
496
04fe2037 497 if (beaconint_us > latency) {
10f644a4 498 local->ps_sdata = NULL;
04fe2037 499 } else {
56007a02 500 struct ieee80211_bss *bss;
04fe2037 501 int maxslp = 1;
56007a02 502 u8 dtimper;
04fe2037 503
56007a02
JB
504 bss = (void *)found->u.mgd.associated->priv;
505 dtimper = bss->dtim_period;
506
507 /* If the TIM IE is invalid, pretend the value is 1 */
508 if (!dtimper)
509 dtimper = 1;
510 else if (dtimper > 1)
04fe2037
JB
511 maxslp = min_t(int, dtimper,
512 latency / beaconint_us);
513
9ccebe61 514 local->hw.conf.max_sleep_period = maxslp;
56007a02 515 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 516 local->ps_sdata = found;
04fe2037 517 }
10f644a4 518 } else {
965bedad 519 local->ps_sdata = NULL;
10f644a4 520 }
965bedad 521
af6b6374 522 change:
965bedad
JB
523 ieee80211_change_ps(local);
524}
525
526void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
527{
528 struct ieee80211_local *local =
529 container_of(work, struct ieee80211_local,
530 dynamic_ps_disable_work);
531
532 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
533 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
534 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
535 }
536
537 ieee80211_wake_queues_by_reason(&local->hw,
538 IEEE80211_QUEUE_STOP_REASON_PS);
539}
540
541void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
542{
543 struct ieee80211_local *local =
544 container_of(work, struct ieee80211_local,
545 dynamic_ps_enable_work);
546 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB
548
549 /* can only happen when PS was just disabled anyway */
550 if (!sdata)
551 return;
552
553 if (local->hw.conf.flags & IEEE80211_CONF_PS)
554 return;
555
375177bf
VN
556 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
557 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB
558 ieee80211_send_nullfunc(local, sdata, 1);
559
375177bf
VN
560 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) ||
561 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
562 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
563 local->hw.conf.flags |= IEEE80211_CONF_PS;
564 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
565 }
965bedad
JB
566}
567
568void ieee80211_dynamic_ps_timer(unsigned long data)
569{
570 struct ieee80211_local *local = (void *) data;
571
78f1a8b7 572 if (local->quiescing || local->suspended)
5bb644a0
JB
573 return;
574
42935eca 575 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB
576}
577
60f8b39c 578/* MLME */
f698d856 579static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 580 struct ieee80211_if_managed *ifmgd,
f0706e82
JB
581 u8 *wmm_param, size_t wmm_param_len)
582{
f0706e82
JB
583 struct ieee80211_tx_queue_params params;
584 size_t left;
585 int count;
ab13315a 586 u8 *pos, uapsd_queues = 0;
f0706e82 587
af6b6374 588 if (local->hw.queues < 4)
3434fbd3
JB
589 return;
590
591 if (!wmm_param)
592 return;
593
f0706e82
JB
594 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
595 return;
ab13315a
KV
596
597 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 598 uapsd_queues = local->uapsd_queues;
ab13315a 599
f0706e82 600 count = wmm_param[6] & 0x0f;
46900298 601 if (count == ifmgd->wmm_last_param_set)
f0706e82 602 return;
46900298 603 ifmgd->wmm_last_param_set = count;
f0706e82
JB
604
605 pos = wmm_param + 8;
606 left = wmm_param_len - 8;
607
608 memset(&params, 0, sizeof(params));
609
f0706e82
JB
610 local->wmm_acm = 0;
611 for (; left >= 4; left -= 4, pos += 4) {
612 int aci = (pos[0] >> 5) & 0x03;
613 int acm = (pos[0] >> 4) & 0x01;
ab13315a 614 bool uapsd = false;
f0706e82
JB
615 int queue;
616
617 switch (aci) {
0eeb59fe 618 case 1: /* AC_BK */
e100bb64 619 queue = 3;
988c0f72 620 if (acm)
0eeb59fe 621 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV
622 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
623 uapsd = true;
f0706e82 624 break;
0eeb59fe 625 case 2: /* AC_VI */
e100bb64 626 queue = 1;
988c0f72 627 if (acm)
0eeb59fe 628 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV
629 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
630 uapsd = true;
f0706e82 631 break;
0eeb59fe 632 case 3: /* AC_VO */
e100bb64 633 queue = 0;
988c0f72 634 if (acm)
0eeb59fe 635 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV
636 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
637 uapsd = true;
f0706e82 638 break;
0eeb59fe 639 case 0: /* AC_BE */
f0706e82 640 default:
e100bb64 641 queue = 2;
988c0f72 642 if (acm)
0eeb59fe 643 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV
644 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
645 uapsd = true;
f0706e82
JB
646 break;
647 }
648
649 params.aifs = pos[0] & 0x0f;
650 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
651 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 652 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV
653 params.uapsd = uapsd;
654
f4ea83dd 655#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 656 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
ab13315a 657 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
0bffe40f 658 wiphy_name(local->hw.wiphy), queue, aci, acm,
ab13315a
KV
659 params.aifs, params.cw_min, params.cw_max, params.txop,
660 params.uapsd);
3330d7be 661#endif
24487981 662 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 663 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB
664 "parameters for queue %d\n",
665 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB
666 }
667}
668
7a5158ef
JB
669static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
670 u16 capab, bool erp_valid, u8 erp)
5628221c 671{
bda3933a 672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 673 u32 changed = 0;
7a5158ef
JB
674 bool use_protection;
675 bool use_short_preamble;
676 bool use_short_slot;
677
678 if (erp_valid) {
679 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
680 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
681 } else {
682 use_protection = false;
683 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
684 }
685
686 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF
687 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
688 use_short_slot = true;
5628221c 689
471b3efd 690 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB
691 bss_conf->use_cts_prot = use_protection;
692 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 693 }
7e9ed188 694
d43c7b37 695 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 696 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 697 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 698 }
d9430a32 699
7a5158ef 700 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB
701 bss_conf->use_short_slot = use_short_slot;
702 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL
703 }
704
705 return changed;
706}
707
f698d856 708static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 709 struct cfg80211_bss *cbss,
ae5eb026 710 u32 bss_info_changed)
f0706e82 711{
0c1ad2ca 712 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 713 struct ieee80211_local *local = sdata->local;
d6f2da5b 714
ae5eb026 715 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 716 /* set timing information */
0c1ad2ca
JB
717 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
718 sdata->vif.bss_conf.timestamp = cbss->tsf;
5628221c 719
77fdaa12
JB
720 bss_info_changed |= BSS_CHANGED_BEACON_INT;
721 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 722 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 723
0c1ad2ca
JB
724 sdata->u.mgd.associated = cbss;
725 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 726
b291ba11
JB
727 /* just to be sure */
728 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
729 IEEE80211_STA_BEACON_POLL);
730
0183826b
JB
731 /*
732 * Always handle WMM once after association regardless
733 * of the first value the AP uses. Setting -1 here has
734 * that effect because the AP values is an unsigned
735 * 4-bit value.
736 */
737 sdata->u.mgd.wmm_last_param_set = -1;
738
9ac19a90 739 ieee80211_led_assoc(local, 1);
9306102e 740
bda3933a 741 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB
742 /*
743 * For now just always ask the driver to update the basic rateset
744 * when we have associated, we aren't checking whether it actually
745 * changed or not.
746 */
ae5eb026 747 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB
748
749 /* And the BSSID changed - we're associated now */
750 bss_info_changed |= BSS_CHANGED_BSSID;
751
ae5eb026 752 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 753
056508dc
JB
754 mutex_lock(&local->iflist_mtx);
755 ieee80211_recalc_ps(local, -1);
0f78231b 756 ieee80211_recalc_smps(local, sdata);
056508dc 757 mutex_unlock(&local->iflist_mtx);
e0cb686f 758
8a5b33f5 759 netif_tx_start_all_queues(sdata->dev);
9ac19a90 760 netif_carrier_on(sdata->dev);
f0706e82
JB
761}
762
63f170e0 763static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 764{
46900298 765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW
766 struct ieee80211_local *local = sdata->local;
767 struct sta_info *sta;
e0cb686f 768 u32 changed = 0, config_changed = 0;
b291ba11 769 u8 bssid[ETH_ALEN];
aa458d17 770
77fdaa12
JB
771 ASSERT_MGD_MTX(ifmgd);
772
b291ba11
JB
773 if (WARN_ON(!ifmgd->associated))
774 return;
775
0c1ad2ca 776 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 777
77fdaa12
JB
778 ifmgd->associated = NULL;
779 memset(ifmgd->bssid, 0, ETH_ALEN);
780
781 /*
782 * we need to commit the associated = NULL change because the
783 * scan code uses that to determine whether this iface should
784 * go to/wake up from powersave or not -- and could otherwise
785 * wake the queues erroneously.
786 */
787 smp_mb();
788
789 /*
790 * Thus, we can only afterwards stop the queues -- to account
791 * for the case where another CPU is finishing a scan at this
792 * time -- we don't want the scan code to enable queues.
793 */
aa458d17 794
8a5b33f5 795 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW
796 netif_carrier_off(sdata->dev);
797
1fa6f4af 798 rcu_read_lock();
abe60632 799 sta = sta_info_get(sdata, bssid);
4cad6c7c
S
800 if (sta) {
801 set_sta_flags(sta, WLAN_STA_DISASSOC);
1fa6f4af 802 ieee80211_sta_tear_down_BA_sessions(sta);
4cad6c7c 803 }
1fa6f4af 804 rcu_read_unlock();
aa458d17 805
f5e5bf25
TW
806 changed |= ieee80211_reset_erp_info(sdata);
807
f5e5bf25 808 ieee80211_led_assoc(local, 0);
ae5eb026
JB
809 changed |= BSS_CHANGED_ASSOC;
810 sdata->vif.bss_conf.assoc = false;
f5e5bf25 811
aa837e1d
JB
812 ieee80211_set_wmm_default(sdata);
813
4797938c 814 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 815 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 816
413ad50a
JB
817 /* on the next assoc, re-program HT parameters */
818 sdata->ht_opmode_valid = false;
819
a8302de9
VT
820 local->power_constr_level = 0;
821
520eb820
KV
822 del_timer_sync(&local->dynamic_ps_timer);
823 cancel_work_sync(&local->dynamic_ps_enable_work);
824
e0cb686f
KV
825 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
826 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
827 config_changed |= IEEE80211_CONF_CHANGE_PS;
828 }
ae5eb026 829
e0cb686f 830 ieee80211_hw_config(local, config_changed);
9cef8737
JB
831
832 /* And the BSSID changed -- not very interesting here */
833 changed |= BSS_CHANGED_BSSID;
ae5eb026 834 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 835
34e89507 836 sta_info_destroy_addr(sdata, bssid);
aa458d17 837}
f0706e82 838
3cf335d5
KV
839void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
840 struct ieee80211_hdr *hdr)
841{
842 /*
843 * We can postpone the mgd.timer whenever receiving unicast frames
844 * from AP because we know that the connection is working both ways
845 * at that time. But multicast frames (and hence also beacons) must
846 * be ignored here, because we need to trigger the timer during
b291ba11
JB
847 * data idle periods for sending the periodic probe request to the
848 * AP we're connected to.
3cf335d5 849 */
b291ba11
JB
850 if (is_multicast_ether_addr(hdr->addr1))
851 return;
852
853 mod_timer(&sdata->u.mgd.conn_mon_timer,
854 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 855}
f0706e82 856
a43abf29
ML
857static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
858{
859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
860 const u8 *ssid;
861
0c1ad2ca
JB
862 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
863 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
a43abf29
ML
864 ssid + 2, ssid[1], NULL, 0);
865
866 ifmgd->probe_send_count++;
867 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
868 run_again(ifmgd, ifmgd->probe_timeout);
869}
870
b291ba11
JB
871static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
872 bool beacon)
04de8381 873{
04de8381 874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 875 bool already = false;
34bfc411 876
9607e6b6 877 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB
878 return;
879
91a3bd76
LR
880 if (sdata->local->scanning)
881 return;
882
b8bc4b0a
JB
883 if (sdata->local->tmp_channel)
884 return;
885
77fdaa12
JB
886 mutex_lock(&ifmgd->mtx);
887
888 if (!ifmgd->associated)
889 goto out;
890
a860402d 891#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB
892 if (beacon && net_ratelimit())
893 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 894 "- sending probe request\n", sdata->name);
a860402d 895#endif
04de8381 896
b291ba11
JB
897 /*
898 * The driver/our work has already reported this event or the
899 * connection monitoring has kicked in and we have already sent
900 * a probe request. Or maybe the AP died and the driver keeps
901 * reporting until we disassociate...
902 *
903 * In either case we have to ignore the current call to this
904 * function (except for setting the correct probe reason bit)
905 * because otherwise we would reset the timer every time and
906 * never check whether we received a probe response!
907 */
908 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
909 IEEE80211_STA_CONNECTION_POLL))
910 already = true;
911
912 if (beacon)
913 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
914 else
915 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
916
917 if (already)
918 goto out;
919
4e751843
JB
920 mutex_lock(&sdata->local->iflist_mtx);
921 ieee80211_recalc_ps(sdata->local, -1);
922 mutex_unlock(&sdata->local->iflist_mtx);
923
a43abf29
ML
924 ifmgd->probe_send_count = 0;
925 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB
926 out:
927 mutex_unlock(&ifmgd->mtx);
04de8381
KV
928}
929
b291ba11
JB
930void ieee80211_beacon_loss_work(struct work_struct *work)
931{
932 struct ieee80211_sub_if_data *sdata =
933 container_of(work, struct ieee80211_sub_if_data,
934 u.mgd.beacon_loss_work);
935
936 ieee80211_mgd_probe_ap(sdata, true);
937}
938
04de8381
KV
939void ieee80211_beacon_loss(struct ieee80211_vif *vif)
940{
941 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
942
42935eca 943 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV
944}
945EXPORT_SYMBOL(ieee80211_beacon_loss);
946
77fdaa12
JB
947static enum rx_mgmt_action __must_check
948ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 949 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 950{
46900298 951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 952 const u8 *bssid = NULL;
f0706e82
JB
953 u16 reason_code;
954
f4ea83dd 955 if (len < 24 + 2)
77fdaa12 956 return RX_MGMT_NONE;
f0706e82 957
77fdaa12
JB
958 ASSERT_MGD_MTX(ifmgd);
959
0c1ad2ca 960 bssid = ifmgd->associated->bssid;
f0706e82
JB
961
962 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
963
77fdaa12 964 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 965 sdata->name, bssid, reason_code);
77fdaa12 966
63f170e0
JB
967 ieee80211_set_disassoc(sdata);
968 ieee80211_recalc_idle(sdata->local);
f0706e82 969
77fdaa12 970 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB
971}
972
973
77fdaa12
JB
974static enum rx_mgmt_action __must_check
975ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 977{
46900298 978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB
979 u16 reason_code;
980
f4ea83dd 981 if (len < 24 + 2)
77fdaa12 982 return RX_MGMT_NONE;
f0706e82 983
77fdaa12
JB
984 ASSERT_MGD_MTX(ifmgd);
985
986 if (WARN_ON(!ifmgd->associated))
987 return RX_MGMT_NONE;
988
0c1ad2ca 989 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 990 return RX_MGMT_NONE;
f0706e82
JB
991
992 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
993
0ff71613 994 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 995 sdata->name, mgmt->sa, reason_code);
f0706e82 996
63f170e0 997 ieee80211_set_disassoc(sdata);
bc83b681 998 ieee80211_recalc_idle(sdata->local);
77fdaa12 999 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB
1000}
1001
1002
af6b6374
JB
1003static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1004 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1005{
af6b6374 1006 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1008 struct ieee80211_local *local = sdata->local;
8318d78a 1009 struct ieee80211_supported_band *sband;
f0706e82 1010 struct sta_info *sta;
0c1ad2ca 1011 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1012 u8 *pos;
881d948c 1013 u32 rates, basic_rates;
af6b6374 1014 u16 capab_info, aid;
f0706e82 1015 struct ieee802_11_elems elems;
bda3933a 1016 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1017 u32 changed = 0;
5d1ec85f
JB
1018 int i, j, err;
1019 bool have_higher_than_11mbit = false;
ae5eb026 1020 u16 ap_ht_cap_flags;
f0706e82 1021
af6b6374 1022 /* AssocResp and ReassocResp have identical structure */
f0706e82 1023
f0706e82 1024 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1025 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1026
1dd84aa2
JB
1027 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1028 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1029 "set\n", sdata->name, aid);
1dd84aa2
JB
1030 aid &= ~(BIT(15) | BIT(14));
1031
af6b6374
JB
1032 pos = mgmt->u.assoc_resp.variable;
1033 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1034
f0706e82
JB
1035 if (!elems.supp_rates) {
1036 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1037 sdata->name);
af6b6374 1038 return false;
f0706e82
JB
1039 }
1040
46900298 1041 ifmgd->aid = aid;
f0706e82 1042
0c1ad2ca 1043 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1044 if (!sta) {
5d1ec85f
JB
1045 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1046 " the AP\n", sdata->name);
af6b6374 1047 return false;
77fdaa12 1048 }
05e5e883 1049
5d1ec85f
JB
1050 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1051 WLAN_STA_ASSOC_AP);
1052 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1053 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1054
60f8b39c
JB
1055 rates = 0;
1056 basic_rates = 0;
1057 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1058
60f8b39c
JB
1059 for (i = 0; i < elems.supp_rates_len; i++) {
1060 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1061 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1062
60f8b39c
JB
1063 if (rate > 110)
1064 have_higher_than_11mbit = true;
1065
1066 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1067 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1068 rates |= BIT(j);
d61272cb
TW
1069 if (is_basic)
1070 basic_rates |= BIT(j);
1071 break;
1072 }
f709fc69 1073 }
f709fc69
LCC
1074 }
1075
60f8b39c
JB
1076 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1077 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1078 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1079
60f8b39c
JB
1080 if (rate > 110)
1081 have_higher_than_11mbit = true;
f0706e82 1082
60f8b39c 1083 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1084 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1085 rates |= BIT(j);
d61272cb
TW
1086 if (is_basic)
1087 basic_rates |= BIT(j);
1088 break;
1089 }
60f8b39c 1090 }
1ebebea8 1091 }
f0706e82 1092
323ce79a 1093 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1094 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB
1095
1096 /* cf. IEEE 802.11 9.2.12 */
1097 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1098 have_higher_than_11mbit)
1099 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1100 else
1101 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1102
ab1faead 1103 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1104 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1105 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB
1106
1107 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1108
4b7679a5 1109 rate_control_rate_init(sta);
f0706e82 1110
46900298 1111 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM
1112 set_sta_flags(sta, WLAN_STA_MFP);
1113
ddf4ac53 1114 if (elems.wmm_param)
60f8b39c 1115 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1116
5d1ec85f
JB
1117 err = sta_info_insert(sta);
1118 sta = NULL;
1119 if (err) {
1120 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1121 " the AP (error %d)\n", sdata->name, err);
90be561b 1122 return false;
ddf4ac53
JB
1123 }
1124
ddf4ac53 1125 if (elems.wmm_param)
46900298 1126 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1127 elems.wmm_param_len);
aa837e1d
JB
1128 else
1129 ieee80211_set_wmm_default(sdata);
f0706e82 1130
e4da8c37
JB
1131 local->oper_channel = wk->chan;
1132
ae5eb026 1133 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1134 (sdata->local->hw.queues >= 4) &&
ab1faead 1135 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1136 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1137 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1138
60f8b39c
JB
1139 /* set AID and assoc capability,
1140 * ieee80211_set_associated() will tell the driver */
1141 bss_conf->aid = aid;
1142 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1143 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1144
d524215f
FF
1145 /*
1146 * If we're using 4-addr mode, let the AP know that we're
1147 * doing so, so that it can create the STA VLAN on its side
1148 */
1149 if (ifmgd->use_4addr)
1150 ieee80211_send_4addr_nullfunc(local, sdata);
1151
15b7b062 1152 /*
b291ba11
JB
1153 * Start timer to probe the connection to the AP now.
1154 * Also start the timer that will detect beacon loss.
15b7b062 1155 */
b291ba11
JB
1156 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1157 mod_beacon_timer(sdata);
15b7b062 1158
af6b6374 1159 return true;
f0706e82
JB
1160}
1161
1162
98c8fccf
JB
1163static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1164 struct ieee80211_mgmt *mgmt,
1165 size_t len,
1166 struct ieee80211_rx_status *rx_status,
1167 struct ieee802_11_elems *elems,
1168 bool beacon)
1169{
1170 struct ieee80211_local *local = sdata->local;
1171 int freq;
c2b13452 1172 struct ieee80211_bss *bss;
98c8fccf 1173 struct ieee80211_channel *channel;
56007a02
JB
1174 bool need_ps = false;
1175
1176 if (sdata->u.mgd.associated) {
1177 bss = (void *)sdata->u.mgd.associated->priv;
1178 /* not previously set so we may need to recalc */
1179 need_ps = !bss->dtim_period;
1180 }
98c8fccf
JB
1181
1182 if (elems->ds_params && elems->ds_params_len == 1)
1183 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1184 else
1185 freq = rx_status->freq;
1186
1187 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1188
1189 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1190 return;
1191
98c8fccf 1192 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1193 channel, beacon);
77fdaa12
JB
1194 if (bss)
1195 ieee80211_rx_bss_put(local, bss);
1196
1197 if (!sdata->u.mgd.associated)
98c8fccf
JB
1198 return;
1199
56007a02
JB
1200 if (need_ps) {
1201 mutex_lock(&local->iflist_mtx);
1202 ieee80211_recalc_ps(local, -1);
1203 mutex_unlock(&local->iflist_mtx);
1204 }
1205
c481ec97 1206 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1207 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1208 ETH_ALEN) == 0)) {
c481ec97
S
1209 struct ieee80211_channel_sw_ie *sw_elem =
1210 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1211 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1212 }
f0706e82
JB
1213}
1214
1215
f698d856 1216static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1217 struct sk_buff *skb)
f0706e82 1218{
af6b6374 1219 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1220 struct ieee80211_if_managed *ifmgd;
af6b6374
JB
1221 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1222 size_t baselen, len = skb->len;
ae6a44e3
EK
1223 struct ieee802_11_elems elems;
1224
15b7b062
KV
1225 ifmgd = &sdata->u.mgd;
1226
77fdaa12
JB
1227 ASSERT_MGD_MTX(ifmgd);
1228
47846c9b 1229 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW
1230 return; /* ignore ProbeResp to foreign address */
1231
ae6a44e3
EK
1232 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1233 if (baselen > len)
1234 return;
1235
1236 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1237 &elems);
1238
98c8fccf 1239 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1240
77fdaa12 1241 if (ifmgd->associated &&
0c1ad2ca 1242 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
b291ba11
JB
1243 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1244 IEEE80211_STA_CONNECTION_POLL)) {
1245 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1246 IEEE80211_STA_BEACON_POLL);
4e751843
JB
1247 mutex_lock(&sdata->local->iflist_mtx);
1248 ieee80211_recalc_ps(sdata->local, -1);
1249 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB
1250 /*
1251 * We've received a probe response, but are not sure whether
1252 * we have or will be receiving any beacons or data, so let's
1253 * schedule the timers again, just in case.
1254 */
1255 mod_beacon_timer(sdata);
1256 mod_timer(&ifmgd->conn_mon_timer,
1257 round_jiffies_up(jiffies +
1258 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1259 }
f0706e82
JB
1260}
1261
d91f36db
JB
1262/*
1263 * This is the canonical list of information elements we care about,
1264 * the filter code also gives us all changes to the Microsoft OUI
1265 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1266 *
1267 * We implement beacon filtering in software since that means we can
1268 * avoid processing the frame here and in cfg80211, and userspace
1269 * will not be able to tell whether the hardware supports it or not.
1270 *
1271 * XXX: This list needs to be dynamic -- userspace needs to be able to
1272 * add items it requires. It also needs to be able to tell us to
1273 * look out for other vendor IEs.
1274 */
1275static const u64 care_about_ies =
1d4df3a5
JB
1276 (1ULL << WLAN_EID_COUNTRY) |
1277 (1ULL << WLAN_EID_ERP_INFO) |
1278 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1279 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1280 (1ULL << WLAN_EID_HT_CAPABILITY) |
1281 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1282
f698d856 1283static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1284 struct ieee80211_mgmt *mgmt,
1285 size_t len,
1286 struct ieee80211_rx_status *rx_status)
1287{
d91f36db 1288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB
1289 size_t baselen;
1290 struct ieee802_11_elems elems;
f698d856 1291 struct ieee80211_local *local = sdata->local;
471b3efd 1292 u32 changed = 0;
d91f36db 1293 bool erp_valid, directed_tim = false;
7a5158ef 1294 u8 erp_value = 0;
d91f36db 1295 u32 ncrc;
77fdaa12
JB
1296 u8 *bssid;
1297
1298 ASSERT_MGD_MTX(ifmgd);
f0706e82 1299
ae6a44e3
EK
1300 /* Process beacon from the current BSS */
1301 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1302 if (baselen > len)
1303 return;
1304
d91f36db 1305 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1306 return;
f0706e82 1307
b291ba11
JB
1308 /*
1309 * We might have received a number of frames, among them a
1310 * disassoc frame and a beacon...
1311 */
1312 if (!ifmgd->associated)
77fdaa12
JB
1313 return;
1314
0c1ad2ca 1315 bssid = ifmgd->associated->bssid;
77fdaa12 1316
b291ba11
JB
1317 /*
1318 * And in theory even frames from a different AP we were just
1319 * associated to a split-second ago!
1320 */
1321 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB
1322 return;
1323
b291ba11 1324 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM
1325#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1326 if (net_ratelimit()) {
1327 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1328 "to a received beacon\n", sdata->name);
92778180
JM
1329 }
1330#endif
b291ba11 1331 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB
1332 mutex_lock(&local->iflist_mtx);
1333 ieee80211_recalc_ps(local, -1);
1334 mutex_unlock(&local->iflist_mtx);
92778180
JM
1335 }
1336
b291ba11
JB
1337 /*
1338 * Push the beacon loss detection into the future since
1339 * we are processing a beacon from the AP just now.
1340 */
1341 mod_beacon_timer(sdata);
1342
d91f36db
JB
1343 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1344 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1345 len - baselen, &elems,
1346 care_about_ies, ncrc);
1347
1348 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB
1349 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1350 ifmgd->aid);
d91f36db 1351
30196673
JM
1352 if (ncrc != ifmgd->beacon_crc) {
1353 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1354 true);
d91f36db 1355
30196673
JM
1356 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1357 elems.wmm_param_len);
1358 }
fe3fa827 1359
25c9c875 1360 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1361 if (directed_tim) {
572e0012
KV
1362 if (local->hw.conf.dynamic_ps_timeout > 0) {
1363 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1364 ieee80211_hw_config(local,
1365 IEEE80211_CONF_CHANGE_PS);
1366 ieee80211_send_nullfunc(local, sdata, 0);
1367 } else {
1368 local->pspolling = true;
1369
1370 /*
1371 * Here is assumed that the driver will be
1372 * able to send ps-poll frame and receive a
1373 * response even though power save mode is
1374 * enabled, but some drivers might require
1375 * to disable power save here. This needs
1376 * to be investigated.
1377 */
1378 ieee80211_send_pspoll(local, sdata);
1379 }
a97b77b9
VN
1380 }
1381 }
7a5158ef 1382
30196673
JM
1383 if (ncrc == ifmgd->beacon_crc)
1384 return;
1385 ifmgd->beacon_crc = ncrc;
1386
7a5158ef
JB
1387 if (elems.erp_info && elems.erp_info_len >= 1) {
1388 erp_valid = true;
1389 erp_value = elems.erp_info[0];
1390 } else {
1391 erp_valid = false;
50c4afb9 1392 }
7a5158ef
JB
1393 changed |= ieee80211_handle_bss_capability(sdata,
1394 le16_to_cpu(mgmt->u.beacon.capab_info),
1395 erp_valid, erp_value);
f0706e82 1396
d3c990fb 1397
53d6f81c 1398 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1399 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB
1400 struct sta_info *sta;
1401 struct ieee80211_supported_band *sband;
1402 u16 ap_ht_cap_flags;
1403
1404 rcu_read_lock();
1405
abe60632 1406 sta = sta_info_get(sdata, bssid);
77fdaa12 1407 if (WARN_ON(!sta)) {
ae5eb026
JB
1408 rcu_read_unlock();
1409 return;
1410 }
1411
1412 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1413
1414 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1415 elems.ht_cap_elem, &sta->sta.ht_cap);
1416
1417 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1418
1419 rcu_read_unlock();
1420
1421 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1422 bssid, ap_ht_cap_flags);
d3c990fb
RR
1423 }
1424
8b19e6ca 1425 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1426 if (elems.country_elem) {
a8302de9
VT
1427 /* TODO: IBSS also needs this */
1428 if (elems.pwr_constr_elem)
1429 ieee80211_handle_pwr_constr(sdata,
1430 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1431 elems.pwr_constr_elem,
1432 elems.pwr_constr_elem_len);
3f2355cb
LR
1433 }
1434
471b3efd 1435 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB
1436}
1437
46900298 1438ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1439 struct sk_buff *skb)
f0706e82 1440{
f698d856 1441 struct ieee80211_local *local = sdata->local;
f0706e82
JB
1442 struct ieee80211_mgmt *mgmt;
1443 u16 fc;
1444
1445 if (skb->len < 24)
46900298 1446 return RX_DROP_MONITOR;
f0706e82
JB
1447
1448 mgmt = (struct ieee80211_mgmt *) skb->data;
1449 fc = le16_to_cpu(mgmt->frame_control);
1450
1451 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB
1452 case IEEE80211_STYPE_PROBE_RESP:
1453 case IEEE80211_STYPE_BEACON:
f0706e82
JB
1454 case IEEE80211_STYPE_DEAUTH:
1455 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1456 case IEEE80211_STYPE_ACTION:
46900298 1457 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1458 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1459 return RX_QUEUED;
f0706e82
JB
1460 }
1461
46900298 1462 return RX_DROP_MONITOR;
f0706e82
JB
1463}
1464
f698d856 1465static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1466 struct sk_buff *skb)
1467{
77fdaa12 1468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1469 struct ieee80211_rx_status *rx_status;
f0706e82 1470 struct ieee80211_mgmt *mgmt;
77fdaa12 1471 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB
1472 u16 fc;
1473
f0706e82
JB
1474 rx_status = (struct ieee80211_rx_status *) skb->cb;
1475 mgmt = (struct ieee80211_mgmt *) skb->data;
1476 fc = le16_to_cpu(mgmt->frame_control);
1477
77fdaa12
JB
1478 mutex_lock(&ifmgd->mtx);
1479
1480 if (ifmgd->associated &&
0c1ad2ca 1481 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB
1482 switch (fc & IEEE80211_FCTL_STYPE) {
1483 case IEEE80211_STYPE_BEACON:
1484 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1485 rx_status);
1486 break;
1487 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1488 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB
1489 break;
1490 case IEEE80211_STYPE_DEAUTH:
63f170e0 1491 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB
1492 break;
1493 case IEEE80211_STYPE_DISASSOC:
1494 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1495 break;
1496 case IEEE80211_STYPE_ACTION:
d7907448
FF
1497 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1498 break;
1499
77fdaa12
JB
1500 ieee80211_sta_process_chanswitch(sdata,
1501 &mgmt->u.action.u.chan_switch.sw_elem,
0c1ad2ca 1502 (void *)ifmgd->associated->priv);
77fdaa12
JB
1503 break;
1504 }
1505 mutex_unlock(&ifmgd->mtx);
1506
1507 switch (rma) {
1508 case RX_MGMT_NONE:
1509 /* no action */
1510 break;
1511 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1512 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB
1513 break;
1514 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1515 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB
1516 break;
1517 default:
1518 WARN(1, "unexpected: %d", rma);
1519 }
1520 goto out;
1521 }
1522
77fdaa12
JB
1523 mutex_unlock(&ifmgd->mtx);
1524
63f170e0 1525 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
af6b6374 1526 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
ce470613 1527 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
f0706e82 1528
77fdaa12 1529 out:
f0706e82
JB
1530 kfree_skb(skb);
1531}
1532
9c6bd790 1533static void ieee80211_sta_timer(unsigned long data)
f0706e82 1534{
60f8b39c
JB
1535 struct ieee80211_sub_if_data *sdata =
1536 (struct ieee80211_sub_if_data *) data;
46900298 1537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1538 struct ieee80211_local *local = sdata->local;
f0706e82 1539
5bb644a0
JB
1540 if (local->quiescing) {
1541 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1542 return;
1543 }
1544
42935eca 1545 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB
1546}
1547
9c6bd790
JB
1548static void ieee80211_sta_work(struct work_struct *work)
1549{
1550 struct ieee80211_sub_if_data *sdata =
46900298 1551 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1552 struct ieee80211_local *local = sdata->local;
46900298 1553 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB
1554 struct sk_buff *skb;
1555
9607e6b6 1556 if (!ieee80211_sdata_running(sdata))
9c6bd790
JB
1557 return;
1558
fbe9c429 1559 if (local->scanning)
9c6bd790
JB
1560 return;
1561
46900298 1562 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1563 return;
5bb644a0
JB
1564
1565 /*
42935eca
LR
1566 * ieee80211_queue_work() should have picked up most cases,
1567 * here we'll pick the the rest.
5bb644a0 1568 */
42935eca
LR
1569 if (WARN(local->suspended, "STA MLME work scheduled while "
1570 "going to suspend\n"))
5bb644a0
JB
1571 return;
1572
46900298 1573 ifmgd = &sdata->u.mgd;
f0706e82 1574
77fdaa12 1575 /* first process frames to avoid timing out while a frame is pending */
46900298 1576 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB
1577 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1578
77fdaa12
JB
1579 /* then process the rest of the work */
1580 mutex_lock(&ifmgd->mtx);
1581
b291ba11
JB
1582 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1583 IEEE80211_STA_CONNECTION_POLL) &&
1584 ifmgd->associated) {
a43abf29
ML
1585 u8 bssid[ETH_ALEN];
1586
0c1ad2ca 1587 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11
JB
1588 if (time_is_after_jiffies(ifmgd->probe_timeout))
1589 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML
1590
1591 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1592#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1593 printk(KERN_DEBUG "No probe response from AP %pM"
1594 " after %dms, try %d\n", bssid,
1595 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1596 ifmgd->probe_send_count);
1597#endif
1598 ieee80211_mgd_probe_ap_send(sdata);
1599 } else {
b291ba11
JB
1600 /*
1601 * We actually lost the connection ... or did we?
1602 * Let's make sure!
1603 */
1604 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1605 IEEE80211_STA_BEACON_POLL);
b291ba11
JB
1606 printk(KERN_DEBUG "No probe response from AP %pM"
1607 " after %dms, disconnecting.\n",
1608 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
63f170e0 1609 ieee80211_set_disassoc(sdata);
bc83b681 1610 ieee80211_recalc_idle(local);
b291ba11
JB
1611 mutex_unlock(&ifmgd->mtx);
1612 /*
1613 * must be outside lock due to cfg80211,
1614 * but that's not a problem.
1615 */
1616 ieee80211_send_deauth_disassoc(sdata, bssid,
1617 IEEE80211_STYPE_DEAUTH,
1618 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1619 NULL);
1620 mutex_lock(&ifmgd->mtx);
1621 }
1622 }
1623
77fdaa12 1624 mutex_unlock(&ifmgd->mtx);
f0706e82
JB
1625}
1626
b291ba11
JB
1627static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1628{
1629 struct ieee80211_sub_if_data *sdata =
1630 (struct ieee80211_sub_if_data *) data;
1631 struct ieee80211_local *local = sdata->local;
1632
1633 if (local->quiescing)
1634 return;
1635
42935eca 1636 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB
1637}
1638
1639static void ieee80211_sta_conn_mon_timer(unsigned long data)
1640{
1641 struct ieee80211_sub_if_data *sdata =
1642 (struct ieee80211_sub_if_data *) data;
1643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1644 struct ieee80211_local *local = sdata->local;
1645
1646 if (local->quiescing)
1647 return;
1648
42935eca 1649 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB
1650}
1651
1652static void ieee80211_sta_monitor_work(struct work_struct *work)
1653{
1654 struct ieee80211_sub_if_data *sdata =
1655 container_of(work, struct ieee80211_sub_if_data,
1656 u.mgd.monitor_work);
1657
1658 ieee80211_mgd_probe_ap(sdata, false);
1659}
1660
9c6bd790
JB
1661static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1662{
ad935687 1663 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB
1664 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1665 IEEE80211_STA_CONNECTION_POLL);
ad935687 1666
b291ba11 1667 /* let's probe the connection once */
42935eca 1668 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB
1669 &sdata->u.mgd.monitor_work);
1670 /* and do all the other regular work too */
42935eca 1671 ieee80211_queue_work(&sdata->local->hw,
46900298 1672 &sdata->u.mgd.work);
ad935687 1673 }
9c6bd790 1674}
f0706e82 1675
5bb644a0
JB
1676#ifdef CONFIG_PM
1677void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1678{
1679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1680
1681 /*
1682 * we need to use atomic bitops for the running bits
1683 * only because both timers might fire at the same
1684 * time -- the code here is properly synchronised.
1685 */
1686
1687 cancel_work_sync(&ifmgd->work);
1688 cancel_work_sync(&ifmgd->beacon_loss_work);
1689 if (del_timer_sync(&ifmgd->timer))
1690 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1691
1692 cancel_work_sync(&ifmgd->chswitch_work);
1693 if (del_timer_sync(&ifmgd->chswitch_timer))
1694 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB
1695
1696 cancel_work_sync(&ifmgd->monitor_work);
1697 /* these will just be re-established on connection */
1698 del_timer_sync(&ifmgd->conn_mon_timer);
1699 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB
1700}
1701
1702void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1703{
1704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1705
1706 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1707 add_timer(&ifmgd->timer);
1708 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1709 add_timer(&ifmgd->chswitch_timer);
1710}
1711#endif
1712
9c6bd790
JB
1713/* interface setup */
1714void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1715{
46900298 1716 struct ieee80211_if_managed *ifmgd;
988c0f72 1717
46900298
JB
1718 ifmgd = &sdata->u.mgd;
1719 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 1720 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 1721 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 1722 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 1723 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 1724 (unsigned long) sdata);
b291ba11
JB
1725 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1726 (unsigned long) sdata);
1727 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1728 (unsigned long) sdata);
46900298 1729 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 1730 (unsigned long) sdata);
46900298 1731 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 1732
ab1faead 1733 ifmgd->flags = 0;
bbbdff9e 1734
77fdaa12 1735 mutex_init(&ifmgd->mtx);
0f78231b
JB
1736
1737 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1738 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1739 else
1740 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB
1741}
1742
77fdaa12
JB
1743/* scan finished notification */
1744void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 1745{
77fdaa12 1746 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 1747
77fdaa12
JB
1748 /* Restart STA timers */
1749 rcu_read_lock();
1750 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1751 ieee80211_restart_sta_timer(sdata);
1752 rcu_read_unlock();
1753}
60f8b39c 1754
77fdaa12
JB
1755int ieee80211_max_network_latency(struct notifier_block *nb,
1756 unsigned long data, void *dummy)
1757{
1758 s32 latency_usec = (s32) data;
1759 struct ieee80211_local *local =
1760 container_of(nb, struct ieee80211_local,
1761 network_latency_notifier);
1fa6f4af 1762
77fdaa12
JB
1763 mutex_lock(&local->iflist_mtx);
1764 ieee80211_recalc_ps(local, latency_usec);
1765 mutex_unlock(&local->iflist_mtx);
dfe67012 1766
77fdaa12 1767 return 0;
9c6bd790
JB
1768}
1769
77fdaa12 1770/* config hooks */
af6b6374
JB
1771static enum work_done_result
1772ieee80211_probe_auth_done(struct ieee80211_work *wk,
1773 struct sk_buff *skb)
1774{
1775 if (!skb) {
1776 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1777 return WORK_DONE_DESTROY;
1778 }
1779
1780 if (wk->type == IEEE80211_WORK_AUTH) {
1781 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1782 return WORK_DONE_DESTROY;
1783 }
1784
1785 mutex_lock(&wk->sdata->u.mgd.mtx);
1786 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1787 mutex_unlock(&wk->sdata->u.mgd.mtx);
1788
1789 wk->type = IEEE80211_WORK_AUTH;
1790 wk->probe_auth.tries = 0;
1791 return WORK_DONE_REQUEUE;
1792}
1793
77fdaa12
JB
1794int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1795 struct cfg80211_auth_request *req)
9c6bd790 1796{
77fdaa12 1797 const u8 *ssid;
f679f65d 1798 struct ieee80211_work *wk;
77fdaa12 1799 u16 auth_alg;
9c6bd790 1800
77fdaa12
JB
1801 switch (req->auth_type) {
1802 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1803 auth_alg = WLAN_AUTH_OPEN;
1804 break;
1805 case NL80211_AUTHTYPE_SHARED_KEY:
1806 auth_alg = WLAN_AUTH_SHARED_KEY;
1807 break;
1808 case NL80211_AUTHTYPE_FT:
1809 auth_alg = WLAN_AUTH_FT;
1810 break;
1811 case NL80211_AUTHTYPE_NETWORK_EAP:
1812 auth_alg = WLAN_AUTH_LEAP;
1813 break;
1814 default:
1815 return -EOPNOTSUPP;
60f8b39c 1816 }
77fdaa12
JB
1817
1818 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1819 if (!wk)
9c6bd790 1820 return -ENOMEM;
77fdaa12 1821
5e124bd5 1822 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB
1823
1824 if (req->ie && req->ie_len) {
1825 memcpy(wk->ie, req->ie, req->ie_len);
1826 wk->ie_len = req->ie_len;
9c6bd790 1827 }
77fdaa12 1828
fffd0934 1829 if (req->key && req->key_len) {
af6b6374
JB
1830 wk->probe_auth.key_len = req->key_len;
1831 wk->probe_auth.key_idx = req->key_idx;
1832 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB
1833 }
1834
77fdaa12 1835 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB
1836 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1837 wk->probe_auth.ssid_len = ssid[1];
f679f65d 1838
af6b6374
JB
1839 wk->probe_auth.algorithm = auth_alg;
1840 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 1841
070bb547
JB
1842 /* if we already have a probe, don't probe again */
1843 if (req->bss->proberesp_ies)
1844 wk->type = IEEE80211_WORK_AUTH;
1845 else
1846 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 1847 wk->chan = req->bss->channel;
af6b6374
JB
1848 wk->sdata = sdata;
1849 wk->done = ieee80211_probe_auth_done;
77fdaa12 1850
af6b6374 1851 ieee80211_add_work(wk);
9c6bd790 1852 return 0;
60f8b39c
JB
1853}
1854
af6b6374
JB
1855static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1856 struct sk_buff *skb)
1857{
1858 struct ieee80211_mgmt *mgmt;
1859 u16 status;
1860
1861 if (!skb) {
1862 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1863 return WORK_DONE_DESTROY;
1864 }
1865
1866 mgmt = (void *)skb->data;
1867 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1868
1869 if (status == WLAN_STATUS_SUCCESS) {
1870 mutex_lock(&wk->sdata->u.mgd.mtx);
1871 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
1872 mutex_unlock(&wk->sdata->u.mgd.mtx);
1873 /* oops -- internal error -- send timeout for now */
1874 cfg80211_send_assoc_timeout(wk->sdata->dev,
1875 wk->filter_ta);
1876 return WORK_DONE_DESTROY;
1877 }
1878 mutex_unlock(&wk->sdata->u.mgd.mtx);
1879 }
1880
1881 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
1882 return WORK_DONE_DESTROY;
1883}
1884
77fdaa12
JB
1885int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1886 struct cfg80211_assoc_request *req)
f0706e82 1887{
77fdaa12 1888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 1889 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 1890 struct ieee80211_work *wk;
63f170e0 1891 const u8 *ssid;
af6b6374 1892 int i;
f0706e82 1893
77fdaa12 1894 mutex_lock(&ifmgd->mtx);
af6b6374
JB
1895 if (ifmgd->associated) {
1896 mutex_unlock(&ifmgd->mtx);
1897 return -EALREADY;
1898 }
1899 mutex_unlock(&ifmgd->mtx);
77fdaa12 1900
63f170e0 1901 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB
1902 if (!wk)
1903 return -ENOMEM;
77fdaa12 1904
77fdaa12 1905 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 1906 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12
JB
1907
1908 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
1909 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
1910 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1911 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
1912 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1913
77fdaa12
JB
1914
1915 if (req->ie && req->ie_len) {
1916 memcpy(wk->ie, req->ie, req->ie_len);
1917 wk->ie_len = req->ie_len;
1918 } else
1919 wk->ie_len = 0;
1920
0c1ad2ca 1921 wk->assoc.bss = req->bss;
f679f65d 1922
af6b6374 1923 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 1924
af6b6374
JB
1925 /* new association always uses requested smps mode */
1926 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
1927 if (ifmgd->powersave)
1928 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
1929 else
1930 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
1931 } else
1932 ifmgd->ap_smps = ifmgd->req_smps;
1933
1934 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB
1935 /*
1936 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
1937 * We still associate in non-HT mode (11a/b/g) if any one of these
1938 * ciphers is configured as pairwise.
1939 * We can set this to true for non-11n hardware, that'll be checked
1940 * separately along with the peer capabilities.
1941 */
af6b6374 1942 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 1943 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB
1944 wk->assoc.wmm_used = bss->wmm_used;
1945 wk->assoc.supp_rates = bss->supp_rates;
1946 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB
1947 wk->assoc.ht_information_ie =
1948 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 1949
ab13315a
KV
1950 if (bss->wmm_used && bss->uapsd_supported &&
1951 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
1952 wk->assoc.uapsd_used = true;
1953 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
1954 } else {
1955 wk->assoc.uapsd_used = false;
1956 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
1957 }
1958
63f170e0 1959 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB
1960 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
1961 wk->assoc.ssid_len = ssid[1];
63f170e0 1962
77fdaa12 1963 if (req->prev_bssid)
f679f65d 1964 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 1965
f679f65d 1966 wk->type = IEEE80211_WORK_ASSOC;
f679f65d 1967 wk->chan = req->bss->channel;
af6b6374
JB
1968 wk->sdata = sdata;
1969 wk->done = ieee80211_assoc_done;
77fdaa12
JB
1970
1971 if (req->use_mfp) {
1972 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
1973 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
1974 } else {
1975 ifmgd->mfp = IEEE80211_MFP_DISABLED;
1976 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
1977 }
1978
1979 if (req->crypto.control_port)
1980 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
1981 else
1982 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
1983
af6b6374
JB
1984 ieee80211_add_work(wk);
1985 return 0;
f0706e82
JB
1986}
1987
77fdaa12 1988int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB
1989 struct cfg80211_deauth_request *req,
1990 void *cookie)
f0706e82 1991{
af6b6374 1992 struct ieee80211_local *local = sdata->local;
46900298 1993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 1994 struct ieee80211_work *wk;
63f170e0 1995 const u8 *bssid = req->bss->bssid;
f0706e82 1996
77fdaa12
JB
1997 mutex_lock(&ifmgd->mtx);
1998
0c1ad2ca 1999 if (ifmgd->associated == req->bss) {
77fdaa12 2000 bssid = req->bss->bssid;
63f170e0 2001 ieee80211_set_disassoc(sdata);
af6b6374
JB
2002 mutex_unlock(&ifmgd->mtx);
2003 } else {
2004 bool not_auth_yet = false;
f0706e82 2005
a58ce43f 2006 mutex_unlock(&ifmgd->mtx);
a58ce43f 2007
af6b6374
JB
2008 mutex_lock(&local->work_mtx);
2009 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2010 if (wk->sdata != sdata)
af6b6374 2011 continue;
29165e4c
JB
2012
2013 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2014 wk->type != IEEE80211_WORK_AUTH)
2015 continue;
2016
af6b6374
JB
2017 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2018 continue;
29165e4c
JB
2019
2020 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2021 list_del_rcu(&wk->list);
af6b6374
JB
2022 free_work(wk);
2023 break;
2024 }
2025 mutex_unlock(&local->work_mtx);
2026
2027 /*
2028 * If somebody requests authentication and we haven't
2029 * sent out an auth frame yet there's no need to send
2030 * out a deauth frame either. If the state was PROBE,
2031 * then this is the case. If it's AUTH we have sent a
2032 * frame, and if it's IDLE we have completed the auth
2033 * process already.
2034 */
2035 if (not_auth_yet) {
2036 __cfg80211_auth_canceled(sdata->dev, bssid);
2037 return 0;
2038 }
2039 }
77fdaa12 2040
0ff71613 2041 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2042 sdata->name, bssid, req->reason_code);
0ff71613 2043
77fdaa12 2044 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB
2045 IEEE80211_STYPE_DEAUTH, req->reason_code,
2046 cookie);
f0706e82 2047
bc83b681
JB
2048 ieee80211_recalc_idle(sdata->local);
2049
f0706e82
JB
2050 return 0;
2051}
84363e6e 2052
77fdaa12 2053int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB
2054 struct cfg80211_disassoc_request *req,
2055 void *cookie)
9c6bd790 2056{
77fdaa12 2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2058
77fdaa12 2059 mutex_lock(&ifmgd->mtx);
10f644a4 2060
8d8b261a
JB
2061 /*
2062 * cfg80211 should catch this ... but it's racy since
2063 * we can receive a disassoc frame, process it, hand it
2064 * to cfg80211 while that's in a locked section already
2065 * trying to tell us that the user wants to disconnect.
2066 */
0c1ad2ca 2067 if (ifmgd->associated != req->bss) {
77fdaa12
JB
2068 mutex_unlock(&ifmgd->mtx);
2069 return -ENOLINK;
2070 }
2071
0ff71613 2072 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2073 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2074
63f170e0 2075 ieee80211_set_disassoc(sdata);
77fdaa12
JB
2076
2077 mutex_unlock(&ifmgd->mtx);
10f644a4 2078
77fdaa12 2079 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB
2080 IEEE80211_STYPE_DISASSOC, req->reason_code,
2081 cookie);
bc83b681
JB
2082
2083 ieee80211_recalc_idle(sdata->local);
2084
10f644a4
JB
2085 return 0;
2086}