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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
180205bd
BG
31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB
40
41/*
7ccc8bd7
FF
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF
49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB
51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB
56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG
61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM
67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM
74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB
80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB
83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB
98};
99
5484e237 100/* utils */
77fdaa12
JB
101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB
104}
105
ca386f31
JB
106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB
127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB
133}
134
be099e82
LR
135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR
137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG
139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR
142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR
147
148 ifmgd->probe_send_count = 0;
be099e82
LR
149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB
154}
155
d5522e03
JB
156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
77fdaa12 163 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB
164{
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_supported_band *sband;
d5522e03
JB
167 struct sta_info *sta;
168 u32 changed = 0;
172710bf 169 int hti_cfreq;
9ed6bcce 170 u16 ht_opmode;
0aaffa9b
JB
171 bool enable_ht = true;
172 enum nl80211_channel_type prev_chantype;
d5522e03
JB
173 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
174
175 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176
0aaffa9b
JB
177 prev_chantype = sdata->vif.bss_conf.channel_type;
178
d5522e03
JB
179 /* HT is not supported */
180 if (!sband->ht_cap.ht_supported)
181 enable_ht = false;
182
172710bf
BG
183 if (enable_ht) {
184 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
185 sband->band);
186 /* check that channel matches the right operating channel */
187 if (local->hw.conf.channel->center_freq != hti_cfreq) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
191 */
192 printk(KERN_DEBUG
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
197 sdata->name,
198 local->hw.conf.channel->center_freq,
199 hti_cfreq, hti->control_chan,
200 sband->band);
201 enable_ht = false;
202 }
203 }
d5522e03
JB
204
205 if (enable_ht) {
206 channel_type = NL80211_CHAN_HT20;
207
208 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
209 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
210 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
211 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR
213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40PLUS))
215 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB
216 break;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR
218 if (!(local->hw.conf.channel->flags &
219 IEEE80211_CHAN_NO_HT40MINUS))
220 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB
221 break;
222 }
223 }
224 }
225
fe6f212c
RC
226 if (local->tmp_channel)
227 local->tmp_channel_type = channel_type;
d5522e03 228
0aaffa9b
JB
229 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type = NL80211_CHAN_HT20;
232 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
233 }
d5522e03 234
0aaffa9b
JB
235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local, 0);
d5522e03 237
0aaffa9b 238 if (prev_chantype != channel_type) {
d5522e03 239 rcu_read_lock();
abe60632 240 sta = sta_info_get(sdata, bssid);
d5522e03
JB
241 if (sta)
242 rate_control_rate_update(local, sband, sta,
4fa00437 243 IEEE80211_RC_HT_CHANGED,
0aaffa9b 244 channel_type);
d5522e03 245 rcu_read_unlock();
0aaffa9b 246 }
d5522e03 247
9ed6bcce 248 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB
249
250 /* if bss configuration changed store the new one */
0aaffa9b
JB
251 if (sdata->ht_opmode_valid != enable_ht ||
252 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
253 prev_chantype != channel_type) {
d5522e03 254 changed |= BSS_CHANGED_HT;
9ed6bcce 255 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 256 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB
257 }
258
259 return changed;
260}
261
9c6bd790
JB
262/* frame sending functions */
263
ef422bc0 264static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 265 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 266 void *cookie, bool send_frame)
9ac19a90
JB
267{
268 struct ieee80211_local *local = sdata->local;
46900298 269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB
270 struct sk_buff *skb;
271 struct ieee80211_mgmt *mgmt;
9aed3cc1 272
65fc73ac 273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 274 if (!skb) {
ef422bc0 275 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 276 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB
277 return;
278 }
279 skb_reserve(skb, local->hw.extra_tx_headroom);
280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
77fdaa12 283 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 284 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 285 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 286 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 287 skb_put(skb, 2);
ef422bc0 288 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB
289 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
290
53b46b84 291 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS
292 if (cookie)
293 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
294 else
295 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 296 else
ce470613
HS
297 if (cookie)
298 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
299 else
300 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB
301 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
302 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM
303
304 if (send_frame)
305 ieee80211_tx_skb(sdata, skb);
306 else
307 kfree_skb(skb);
9ac19a90
JB
308}
309
572e0012
KV
310void ieee80211_send_pspoll(struct ieee80211_local *local,
311 struct ieee80211_sub_if_data *sdata)
312{
572e0012
KV
313 struct ieee80211_pspoll *pspoll;
314 struct sk_buff *skb;
572e0012 315
d8cd189e
KV
316 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
317 if (!skb)
572e0012 318 return;
572e0012 319
d8cd189e
KV
320 pspoll = (struct ieee80211_pspoll *) skb->data;
321 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 322
62ae67be
JB
323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
572e0012
KV
325}
326
965bedad
JB
327void ieee80211_send_nullfunc(struct ieee80211_local *local,
328 struct ieee80211_sub_if_data *sdata,
329 int powersave)
330{
331 struct sk_buff *skb;
d8cd189e 332 struct ieee80211_hdr_3addr *nullfunc;
965bedad 333
d8cd189e
KV
334 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
335 if (!skb)
965bedad 336 return;
965bedad 337
d8cd189e 338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 339 if (powersave)
d8cd189e 340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 341
62ae67be
JB
342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
343 ieee80211_tx_skb(sdata, skb);
965bedad
JB
344}
345
d524215f
FF
346static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
347 struct ieee80211_sub_if_data *sdata)
348{
349 struct sk_buff *skb;
350 struct ieee80211_hdr *nullfunc;
351 __le16 fc;
352
353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
354 return;
355
356 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
357 if (!skb) {
358 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
359 "nullfunc frame\n", sdata->name);
360 return;
361 }
362 skb_reserve(skb, local->hw.extra_tx_headroom);
363
364 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
365 memset(nullfunc, 0, 30);
366 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
367 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
368 nullfunc->frame_control = fc;
369 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
370 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
371 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
372 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
373
374 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
375 ieee80211_tx_skb(sdata, skb);
376}
377
cc32abd4
JB
378/* spectrum management related things */
379static void ieee80211_chswitch_work(struct work_struct *work)
380{
381 struct ieee80211_sub_if_data *sdata =
382 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB
383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
384
9607e6b6 385 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB
386 return;
387
77fdaa12
JB
388 mutex_lock(&ifmgd->mtx);
389 if (!ifmgd->associated)
390 goto out;
cc32abd4
JB
391
392 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB
393 if (!sdata->local->ops->channel_switch) {
394 /* call "hw_config" only if doing sw channel switch */
395 ieee80211_hw_config(sdata->local,
396 IEEE80211_CONF_CHANGE_CHANNEL);
397 }
77fdaa12 398
cc32abd4 399 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 400 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 401
cc32abd4
JB
402 ieee80211_wake_queues_by_reason(&sdata->local->hw,
403 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB
404 out:
405 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
406 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB
407}
408
5ce6e438
JB
409void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
410{
411 struct ieee80211_sub_if_data *sdata;
412 struct ieee80211_if_managed *ifmgd;
413
414 sdata = vif_to_sdata(vif);
415 ifmgd = &sdata->u.mgd;
416
417 trace_api_chswitch_done(sdata, success);
418 if (!success) {
419 /*
420 * If the channel switch was not successful, stay
421 * around on the old channel. We currently lack
422 * good handling of this situation, possibly we
423 * should just drop the association.
424 */
425 sdata->local->csa_channel = sdata->local->oper_channel;
426 }
427
428 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
429}
430EXPORT_SYMBOL(ieee80211_chswitch_done);
431
cc32abd4
JB
432static void ieee80211_chswitch_timer(unsigned long data)
433{
434 struct ieee80211_sub_if_data *sdata =
435 (struct ieee80211_sub_if_data *) data;
436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
437
5bb644a0
JB
438 if (sdata->local->quiescing) {
439 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
440 return;
441 }
442
42935eca 443 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB
444}
445
446void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
447 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB
448 struct ieee80211_bss *bss,
449 u64 timestamp)
cc32abd4 450{
0c1ad2ca
JB
451 struct cfg80211_bss *cbss =
452 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB
453 struct ieee80211_channel *new_ch;
454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR
455 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
456 cbss->channel->band);
cc32abd4 457
77fdaa12
JB
458 ASSERT_MGD_MTX(ifmgd);
459
460 if (!ifmgd->associated)
cc32abd4
JB
461 return;
462
fbe9c429 463 if (sdata->local->scanning)
cc32abd4
JB
464 return;
465
466 /* Disregard subsequent beacons if we are already running a timer
467 processing a CSA */
468
469 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
470 return;
471
472 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
473 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
474 return;
475
476 sdata->local->csa_channel = new_ch;
477
5ce6e438
JB
478 if (sdata->local->ops->channel_switch) {
479 /* use driver's channel switch callback */
480 struct ieee80211_channel_switch ch_switch;
481 memset(&ch_switch, 0, sizeof(ch_switch));
482 ch_switch.timestamp = timestamp;
483 if (sw_elem->mode) {
484 ch_switch.block_tx = true;
485 ieee80211_stop_queues_by_reason(&sdata->local->hw,
486 IEEE80211_QUEUE_STOP_REASON_CSA);
487 }
488 ch_switch.channel = new_ch;
489 ch_switch.count = sw_elem->count;
490 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
491 drv_channel_switch(sdata->local, &ch_switch);
492 return;
493 }
494
495 /* channel switch handled in software */
cc32abd4 496 if (sw_elem->count <= 1) {
42935eca 497 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 498 } else {
9feaddc7
WYG
499 if (sw_elem->mode)
500 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB
501 IEEE80211_QUEUE_STOP_REASON_CSA);
502 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
503 mod_timer(&ifmgd->chswitch_timer,
504 jiffies +
505 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 506 cbss->beacon_interval));
cc32abd4
JB
507 }
508}
509
510static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
511 u16 capab_info, u8 *pwr_constr_elem,
512 u8 pwr_constr_elem_len)
513{
514 struct ieee80211_conf *conf = &sdata->local->hw.conf;
515
516 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
517 return;
518
519 /* Power constraint IE length should be 1 octet */
520 if (pwr_constr_elem_len != 1)
521 return;
522
523 if ((*pwr_constr_elem <= conf->channel->max_power) &&
524 (*pwr_constr_elem != sdata->local->power_constr_level)) {
525 sdata->local->power_constr_level = *pwr_constr_elem;
526 ieee80211_hw_config(sdata->local, 0);
527 }
528}
529
f90754c1
JO
530void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
531{
532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
533 struct ieee80211_local *local = sdata->local;
534 struct ieee80211_conf *conf = &local->hw.conf;
535
536 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
537 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
538 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
539
540 local->disable_dynamic_ps = false;
541 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
542}
543EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
544
545void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
546{
547 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
548 struct ieee80211_local *local = sdata->local;
549 struct ieee80211_conf *conf = &local->hw.conf;
550
551 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
552 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
553 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
554
555 local->disable_dynamic_ps = true;
556 conf->dynamic_ps_timeout = 0;
557 del_timer_sync(&local->dynamic_ps_timer);
558 ieee80211_queue_work(&local->hw,
559 &local->dynamic_ps_enable_work);
560}
561EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
562
965bedad
JB
563/* powersave */
564static void ieee80211_enable_ps(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata)
566{
567 struct ieee80211_conf *conf = &local->hw.conf;
568
d5edaedc
JB
569 /*
570 * If we are scanning right now then the parameters will
571 * take effect when scan finishes.
572 */
fbe9c429 573 if (local->scanning)
d5edaedc
JB
574 return;
575
965bedad
JB
576 if (conf->dynamic_ps_timeout > 0 &&
577 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
578 mod_timer(&local->dynamic_ps_timer, jiffies +
579 msecs_to_jiffies(conf->dynamic_ps_timeout));
580 } else {
581 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
582 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 583
2a13052f
JO
584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
585 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
586 return;
587
588 conf->flags |= IEEE80211_CONF_PS;
589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB
590 }
591}
592
593static void ieee80211_change_ps(struct ieee80211_local *local)
594{
595 struct ieee80211_conf *conf = &local->hw.conf;
596
597 if (local->ps_sdata) {
965bedad
JB
598 ieee80211_enable_ps(local, local->ps_sdata);
599 } else if (conf->flags & IEEE80211_CONF_PS) {
600 conf->flags &= ~IEEE80211_CONF_PS;
601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 del_timer_sync(&local->dynamic_ps_timer);
603 cancel_work_sync(&local->dynamic_ps_enable_work);
604 }
605}
606
808118cb
JY
607static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
608{
609 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
610 struct sta_info *sta = NULL;
611 u32 sta_flags = 0;
612
613 if (!mgd->powersave)
614 return false;
615
616 if (!mgd->associated)
617 return false;
618
619 if (!mgd->associated->beacon_ies)
620 return false;
621
622 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
623 IEEE80211_STA_CONNECTION_POLL))
624 return false;
625
626 rcu_read_lock();
627 sta = sta_info_get(sdata, mgd->bssid);
628 if (sta)
629 sta_flags = get_sta_flags(sta);
630 rcu_read_unlock();
631
632 if (!(sta_flags & WLAN_STA_AUTHORIZED))
633 return false;
634
635 return true;
636}
637
965bedad 638/* need to hold RTNL or interface lock */
10f644a4 639void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB
640{
641 struct ieee80211_sub_if_data *sdata, *found = NULL;
642 int count = 0;
195e294d 643 int timeout;
965bedad
JB
644
645 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
646 local->ps_sdata = NULL;
647 return;
648 }
649
af6b6374
JB
650 if (!list_empty(&local->work_list)) {
651 local->ps_sdata = NULL;
652 goto change;
653 }
654
965bedad 655 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 656 if (!ieee80211_sdata_running(sdata))
965bedad 657 continue;
8c7914de
RM
658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
659 /* If an AP vif is found, then disable PS
660 * by setting the count to zero thereby setting
661 * ps_sdata to NULL.
662 */
663 count = 0;
664 break;
665 }
965bedad
JB
666 if (sdata->vif.type != NL80211_IFTYPE_STATION)
667 continue;
668 found = sdata;
669 count++;
670 }
671
808118cb 672 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 673 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB
674 s32 beaconint_us;
675
676 if (latency < 0)
ed77134b 677 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB
678
679 beaconint_us = ieee80211_tu_to_usec(
680 found->vif.bss_conf.beacon_int);
681
ff616381 682 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO
683 if (timeout < 0) {
684 /*
ff616381
JO
685 * Go to full PSM if the user configures a very low
686 * latency requirement.
0ab82b04
EP
687 * The 2000 second value is there for compatibility
688 * until the PM_QOS_NETWORK_LATENCY is configured
689 * with real values.
195e294d 690 */
0ab82b04
EP
691 if (latency > (1900 * USEC_PER_MSEC) &&
692 latency != (2000 * USEC_PER_SEC))
195e294d 693 timeout = 0;
ff616381
JO
694 else
695 timeout = 100;
195e294d 696 }
f90754c1
JO
697 local->dynamic_ps_user_timeout = timeout;
698 if (!local->disable_dynamic_ps)
699 conf->dynamic_ps_timeout =
700 local->dynamic_ps_user_timeout;
195e294d 701
04fe2037 702 if (beaconint_us > latency) {
10f644a4 703 local->ps_sdata = NULL;
04fe2037 704 } else {
56007a02 705 struct ieee80211_bss *bss;
04fe2037 706 int maxslp = 1;
56007a02 707 u8 dtimper;
04fe2037 708
56007a02
JB
709 bss = (void *)found->u.mgd.associated->priv;
710 dtimper = bss->dtim_period;
711
712 /* If the TIM IE is invalid, pretend the value is 1 */
713 if (!dtimper)
714 dtimper = 1;
715 else if (dtimper > 1)
04fe2037
JB
716 maxslp = min_t(int, dtimper,
717 latency / beaconint_us);
718
9ccebe61 719 local->hw.conf.max_sleep_period = maxslp;
56007a02 720 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 721 local->ps_sdata = found;
04fe2037 722 }
10f644a4 723 } else {
965bedad 724 local->ps_sdata = NULL;
10f644a4 725 }
965bedad 726
af6b6374 727 change:
965bedad
JB
728 ieee80211_change_ps(local);
729}
730
731void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
732{
733 struct ieee80211_local *local =
734 container_of(work, struct ieee80211_local,
735 dynamic_ps_disable_work);
736
737 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
738 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
740 }
741
742 ieee80211_wake_queues_by_reason(&local->hw,
743 IEEE80211_QUEUE_STOP_REASON_PS);
744}
745
746void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
747{
748 struct ieee80211_local *local =
749 container_of(work, struct ieee80211_local,
750 dynamic_ps_enable_work);
751 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 752 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM
753 unsigned long flags;
754 int q;
965bedad
JB
755
756 /* can only happen when PS was just disabled anyway */
757 if (!sdata)
758 return;
759
5e34069c
CL
760 ifmgd = &sdata->u.mgd;
761
965bedad
JB
762 if (local->hw.conf.flags & IEEE80211_CONF_PS)
763 return;
764
77b7023a
AN
765 if (!local->disable_dynamic_ps &&
766 local->hw.conf.dynamic_ps_timeout > 0) {
767 /* don't enter PS if TX frames are pending */
768 if (drv_tx_frames_pending(local)) {
1ddc2867
RM
769 mod_timer(&local->dynamic_ps_timer, jiffies +
770 msecs_to_jiffies(
771 local->hw.conf.dynamic_ps_timeout));
772 return;
773 }
77b7023a
AN
774
775 /*
776 * transmission can be stopped by others which leads to
777 * dynamic_ps_timer expiry. Postpone the ps timer if it
778 * is not the actual idle state.
779 */
780 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
781 for (q = 0; q < local->hw.queues; q++) {
782 if (local->queue_stop_reasons[q]) {
783 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
784 flags);
785 mod_timer(&local->dynamic_ps_timer, jiffies +
786 msecs_to_jiffies(
787 local->hw.conf.dynamic_ps_timeout));
788 return;
789 }
790 }
791 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 792 }
1ddc2867 793
375177bf 794 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN
795 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
796 netif_tx_stop_all_queues(sdata->dev);
965bedad 797
e8306f98
VN
798 if (drv_tx_frames_pending(local))
799 mod_timer(&local->dynamic_ps_timer, jiffies +
800 msecs_to_jiffies(
801 local->hw.conf.dynamic_ps_timeout));
802 else {
803 ieee80211_send_nullfunc(local, sdata, 1);
804 /* Flush to get the tx status of nullfunc frame */
805 drv_flush(local, false);
806 }
f3e85b9e
VN
807 }
808
2a13052f
JO
809 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
810 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN
811 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
812 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
813 local->hw.conf.flags |= IEEE80211_CONF_PS;
814 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
815 }
f3e85b9e 816
77b7023a
AN
817 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
818 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB
819}
820
821void ieee80211_dynamic_ps_timer(unsigned long data)
822{
823 struct ieee80211_local *local = (void *) data;
824
78f1a8b7 825 if (local->quiescing || local->suspended)
5bb644a0
JB
826 return;
827
42935eca 828 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB
829}
830
60f8b39c 831/* MLME */
f698d856 832static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 833 struct ieee80211_sub_if_data *sdata,
f0706e82
JB
834 u8 *wmm_param, size_t wmm_param_len)
835{
f0706e82 836 struct ieee80211_tx_queue_params params;
4ced3f74 837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB
838 size_t left;
839 int count;
ab13315a 840 u8 *pos, uapsd_queues = 0;
f0706e82 841
e1b3ec1a
SG
842 if (!local->ops->conf_tx)
843 return;
844
af6b6374 845 if (local->hw.queues < 4)
3434fbd3
JB
846 return;
847
848 if (!wmm_param)
849 return;
850
f0706e82
JB
851 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
852 return;
ab13315a
KV
853
854 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 855 uapsd_queues = local->uapsd_queues;
ab13315a 856
f0706e82 857 count = wmm_param[6] & 0x0f;
46900298 858 if (count == ifmgd->wmm_last_param_set)
f0706e82 859 return;
46900298 860 ifmgd->wmm_last_param_set = count;
f0706e82
JB
861
862 pos = wmm_param + 8;
863 left = wmm_param_len - 8;
864
865 memset(&params, 0, sizeof(params));
866
f0706e82
JB
867 local->wmm_acm = 0;
868 for (; left >= 4; left -= 4, pos += 4) {
869 int aci = (pos[0] >> 5) & 0x03;
870 int acm = (pos[0] >> 4) & 0x01;
ab13315a 871 bool uapsd = false;
f0706e82
JB
872 int queue;
873
874 switch (aci) {
0eeb59fe 875 case 1: /* AC_BK */
e100bb64 876 queue = 3;
988c0f72 877 if (acm)
0eeb59fe 878 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV
879 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
880 uapsd = true;
f0706e82 881 break;
0eeb59fe 882 case 2: /* AC_VI */
e100bb64 883 queue = 1;
988c0f72 884 if (acm)
0eeb59fe 885 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV
886 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
887 uapsd = true;
f0706e82 888 break;
0eeb59fe 889 case 3: /* AC_VO */
e100bb64 890 queue = 0;
988c0f72 891 if (acm)
0eeb59fe 892 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV
893 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
894 uapsd = true;
f0706e82 895 break;
0eeb59fe 896 case 0: /* AC_BE */
f0706e82 897 default:
e100bb64 898 queue = 2;
988c0f72 899 if (acm)
0eeb59fe 900 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV
901 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
902 uapsd = true;
f0706e82
JB
903 break;
904 }
905
906 params.aifs = pos[0] & 0x0f;
907 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
908 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 909 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV
910 params.uapsd = uapsd;
911
f4ea83dd 912#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP
913 wiphy_debug(local->hw.wiphy,
914 "WMM queue=%d aci=%d acm=%d aifs=%d "
915 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
916 queue, aci, acm,
917 params.aifs, params.cw_min, params.cw_max,
918 params.txop, params.uapsd);
3330d7be 919#endif
2683d65b 920 local->tx_conf[queue] = params;
e1b3ec1a 921 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP
922 wiphy_debug(local->hw.wiphy,
923 "failed to set TX queue parameters for queue %d\n",
924 queue);
f0706e82 925 }
e1b3ec1a
SG
926
927 /* enable WMM or activate new settings */
4ced3f74
JB
928 sdata->vif.bss_conf.qos = true;
929 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB
930}
931
7a5158ef
JB
932static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
933 u16 capab, bool erp_valid, u8 erp)
5628221c 934{
bda3933a 935 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 936 u32 changed = 0;
7a5158ef
JB
937 bool use_protection;
938 bool use_short_preamble;
939 bool use_short_slot;
940
941 if (erp_valid) {
942 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
943 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
944 } else {
945 use_protection = false;
946 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
947 }
948
949 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF
950 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
951 use_short_slot = true;
5628221c 952
471b3efd 953 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB
954 bss_conf->use_cts_prot = use_protection;
955 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 956 }
7e9ed188 957
d43c7b37 958 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 959 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 960 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 961 }
d9430a32 962
7a5158ef 963 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB
964 bss_conf->use_short_slot = use_short_slot;
965 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL
966 }
967
968 return changed;
969}
970
f698d856 971static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 972 struct cfg80211_bss *cbss,
ae5eb026 973 u32 bss_info_changed)
f0706e82 974{
0c1ad2ca 975 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 976 struct ieee80211_local *local = sdata->local;
68542962 977 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 978
ae5eb026 979 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 980 /* set timing information */
68542962
JO
981 bss_conf->beacon_int = cbss->beacon_interval;
982 bss_conf->timestamp = cbss->tsf;
5628221c 983
77fdaa12
JB
984 bss_info_changed |= BSS_CHANGED_BEACON_INT;
985 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 986 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 987
7ccc8bd7
FF
988 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
989 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
990
0c1ad2ca
JB
991 sdata->u.mgd.associated = cbss;
992 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 993
17e4ec14
JM
994 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
995
b291ba11
JB
996 /* just to be sure */
997 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
998 IEEE80211_STA_BEACON_POLL);
999
9ac19a90 1000 ieee80211_led_assoc(local, 1);
9306102e 1001
e5b900d2
JB
1002 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1003 bss_conf->dtim_period = bss->dtim_period;
1004 else
1005 bss_conf->dtim_period = 0;
1006
68542962 1007 bss_conf->assoc = 1;
96dd22ac
JB
1008 /*
1009 * For now just always ask the driver to update the basic rateset
1010 * when we have associated, we aren't checking whether it actually
1011 * changed or not.
1012 */
ae5eb026 1013 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB
1014
1015 /* And the BSSID changed - we're associated now */
1016 bss_info_changed |= BSS_CHANGED_BSSID;
1017
a97c13c3
JO
1018 /* Tell the driver to monitor connection quality (if supported) */
1019 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1020 bss_conf->cqm_rssi_thold)
a97c13c3
JO
1021 bss_info_changed |= BSS_CHANGED_CQM;
1022
68542962
JO
1023 /* Enable ARP filtering */
1024 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1025 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1026 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1027 }
1028
ae5eb026 1029 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1030
056508dc
JB
1031 mutex_lock(&local->iflist_mtx);
1032 ieee80211_recalc_ps(local, -1);
025e6be2 1033 ieee80211_recalc_smps(local);
056508dc 1034 mutex_unlock(&local->iflist_mtx);
e0cb686f 1035
8a5b33f5 1036 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1037 netif_carrier_on(sdata->dev);
f0706e82
JB
1038}
1039
e69e95db 1040static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1041 bool remove_sta, bool tx)
aa458d17 1042{
46900298 1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW
1044 struct ieee80211_local *local = sdata->local;
1045 struct sta_info *sta;
e0cb686f 1046 u32 changed = 0, config_changed = 0;
b291ba11 1047 u8 bssid[ETH_ALEN];
aa458d17 1048
77fdaa12
JB
1049 ASSERT_MGD_MTX(ifmgd);
1050
b291ba11
JB
1051 if (WARN_ON(!ifmgd->associated))
1052 return;
1053
0c1ad2ca 1054 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1055
77fdaa12
JB
1056 ifmgd->associated = NULL;
1057 memset(ifmgd->bssid, 0, ETH_ALEN);
1058
1059 /*
1060 * we need to commit the associated = NULL change because the
1061 * scan code uses that to determine whether this iface should
1062 * go to/wake up from powersave or not -- and could otherwise
1063 * wake the queues erroneously.
1064 */
1065 smp_mb();
1066
1067 /*
1068 * Thus, we can only afterwards stop the queues -- to account
1069 * for the case where another CPU is finishing a scan at this
1070 * time -- we don't want the scan code to enable queues.
1071 */
aa458d17 1072
8a5b33f5 1073 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW
1074 netif_carrier_off(sdata->dev);
1075
2a419056 1076 mutex_lock(&local->sta_mtx);
abe60632 1077 sta = sta_info_get(sdata, bssid);
4cad6c7c 1078 if (sta) {
2a419056 1079 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1080 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1081 }
2a419056 1082 mutex_unlock(&local->sta_mtx);
aa458d17 1083
f5e5bf25
TW
1084 changed |= ieee80211_reset_erp_info(sdata);
1085
f5e5bf25 1086 ieee80211_led_assoc(local, 0);
ae5eb026
JB
1087 changed |= BSS_CHANGED_ASSOC;
1088 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1089
aa837e1d
JB
1090 ieee80211_set_wmm_default(sdata);
1091
4797938c 1092 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1093 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1094
413ad50a
JB
1095 /* on the next assoc, re-program HT parameters */
1096 sdata->ht_opmode_valid = false;
1097
a8302de9
VT
1098 local->power_constr_level = 0;
1099
520eb820
KV
1100 del_timer_sync(&local->dynamic_ps_timer);
1101 cancel_work_sync(&local->dynamic_ps_enable_work);
1102
e0cb686f
KV
1103 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1104 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1105 config_changed |= IEEE80211_CONF_CHANGE_PS;
1106 }
a331400b 1107 local->ps_sdata = NULL;
ae5eb026 1108
e0cb686f 1109 ieee80211_hw_config(local, config_changed);
9cef8737 1110
68542962
JO
1111 /* Disable ARP filtering */
1112 if (sdata->vif.bss_conf.arp_filter_enabled) {
1113 sdata->vif.bss_conf.arp_filter_enabled = false;
1114 changed |= BSS_CHANGED_ARP_FILTER;
1115 }
1116
0aaffa9b
JB
1117 /* The BSSID (not really interesting) and HT changed */
1118 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1119 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1120
e69e95db
JM
1121 if (remove_sta)
1122 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB
1123
1124 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1125 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1126 del_timer_sync(&sdata->u.mgd.timer);
1127 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1128}
f0706e82 1129
3cf335d5
KV
1130void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1131 struct ieee80211_hdr *hdr)
1132{
1133 /*
1134 * We can postpone the mgd.timer whenever receiving unicast frames
1135 * from AP because we know that the connection is working both ways
1136 * at that time. But multicast frames (and hence also beacons) must
1137 * be ignored here, because we need to trigger the timer during
b291ba11
JB
1138 * data idle periods for sending the periodic probe request to the
1139 * AP we're connected to.
3cf335d5 1140 */
b291ba11
JB
1141 if (is_multicast_ether_addr(hdr->addr1))
1142 return;
1143
be099e82 1144 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1145}
f0706e82 1146
4e5ff376
FF
1147static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1148{
1149 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1150
1151 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1152 IEEE80211_STA_CONNECTION_POLL)))
1153 return;
1154
1155 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1156 IEEE80211_STA_BEACON_POLL);
1157 mutex_lock(&sdata->local->iflist_mtx);
1158 ieee80211_recalc_ps(sdata->local, -1);
1159 mutex_unlock(&sdata->local->iflist_mtx);
1160
1161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1162 return;
1163
1164 /*
1165 * We've received a probe response, but are not sure whether
1166 * we have or will be receiving any beacons or data, so let's
1167 * schedule the timers again, just in case.
1168 */
1169 ieee80211_sta_reset_beacon_monitor(sdata);
1170
1171 mod_timer(&ifmgd->conn_mon_timer,
1172 round_jiffies_up(jiffies +
1173 IEEE80211_CONNECTION_IDLE_TIME));
1174}
1175
1176void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1177 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1178{
75706d0e 1179 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF
1180 return;
1181
04ac3c0e
FF
1182 if (ack)
1183 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF
1184
1185 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1186 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF
1187 if (ack)
1188 sdata->u.mgd.probe_send_count = 0;
1189 else
1190 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF
1191 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1192 }
1193}
1194
a43abf29
ML
1195static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1196{
1197 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1198 const u8 *ssid;
f01a067d 1199 u8 *dst = ifmgd->associated->bssid;
180205bd 1200 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR
1201
1202 /*
1203 * Try sending broadcast probe requests for the last three
1204 * probe requests after the first ones failed since some
1205 * buggy APs only support broadcast probe requests.
1206 */
1207 if (ifmgd->probe_send_count >= unicast_limit)
1208 dst = NULL;
a43abf29 1209
4e5ff376
FF
1210 /*
1211 * When the hardware reports an accurate Tx ACK status, it's
1212 * better to send a nullfunc frame instead of a probe request,
1213 * as it will kick us off the AP quickly if we aren't associated
1214 * anymore. The timeout will be reset if the frame is ACKed by
1215 * the AP.
1216 */
04ac3c0e
FF
1217 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1218 ifmgd->nullfunc_failed = false;
4e5ff376 1219 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1220 } else {
4e5ff376 1221 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1222 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
85a237fe 1223 (u32) -1, true);
4e5ff376 1224 }
a43abf29
ML
1225
1226 ifmgd->probe_send_count++;
180205bd 1227 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML
1228 run_again(ifmgd, ifmgd->probe_timeout);
1229}
1230
b291ba11
JB
1231static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1232 bool beacon)
04de8381 1233{
04de8381 1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1235 bool already = false;
34bfc411 1236
9607e6b6 1237 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB
1238 return;
1239
91a3bd76
LR
1240 if (sdata->local->scanning)
1241 return;
1242
b8bc4b0a
JB
1243 if (sdata->local->tmp_channel)
1244 return;
1245
77fdaa12
JB
1246 mutex_lock(&ifmgd->mtx);
1247
1248 if (!ifmgd->associated)
1249 goto out;
1250
a860402d 1251#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB
1252 if (beacon && net_ratelimit())
1253 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1254 "- sending probe request\n", sdata->name);
a860402d 1255#endif
04de8381 1256
b291ba11
JB
1257 /*
1258 * The driver/our work has already reported this event or the
1259 * connection monitoring has kicked in and we have already sent
1260 * a probe request. Or maybe the AP died and the driver keeps
1261 * reporting until we disassociate...
1262 *
1263 * In either case we have to ignore the current call to this
1264 * function (except for setting the correct probe reason bit)
1265 * because otherwise we would reset the timer every time and
1266 * never check whether we received a probe response!
1267 */
1268 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1269 IEEE80211_STA_CONNECTION_POLL))
1270 already = true;
1271
1272 if (beacon)
1273 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1274 else
1275 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1276
1277 if (already)
1278 goto out;
1279
4e751843
JB
1280 mutex_lock(&sdata->local->iflist_mtx);
1281 ieee80211_recalc_ps(sdata->local, -1);
1282 mutex_unlock(&sdata->local->iflist_mtx);
1283
a43abf29
ML
1284 ifmgd->probe_send_count = 0;
1285 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB
1286 out:
1287 mutex_unlock(&ifmgd->mtx);
04de8381
KV
1288}
1289
a619a4c0
JO
1290struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1291 struct ieee80211_vif *vif)
1292{
1293 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1295 struct sk_buff *skb;
1296 const u8 *ssid;
1297
1298 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1299 return NULL;
1300
1301 ASSERT_MGD_MTX(ifmgd);
1302
1303 if (!ifmgd->associated)
1304 return NULL;
1305
1306 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1307 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB
1308 (u32) -1, ssid + 2, ssid[1],
1309 NULL, 0, true);
a619a4c0
JO
1310
1311 return skb;
1312}
1313EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1314
1e4dcd01
JO
1315static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1316{
1317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1318 struct ieee80211_local *local = sdata->local;
1319 u8 bssid[ETH_ALEN];
1320
1321 mutex_lock(&ifmgd->mtx);
1322 if (!ifmgd->associated) {
1323 mutex_unlock(&ifmgd->mtx);
1324 return;
1325 }
1326
1327 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1328
180205bd
BG
1329 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1330 sdata->name, bssid);
1e4dcd01 1331
53f73c09 1332 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1333 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB
1334
1335 mutex_lock(&local->mtx);
1336 ieee80211_recalc_idle(local);
1337 mutex_unlock(&local->mtx);
1e4dcd01
JO
1338 /*
1339 * must be outside lock due to cfg80211,
1340 * but that's not a problem.
1341 */
1342 ieee80211_send_deauth_disassoc(sdata, bssid,
1343 IEEE80211_STYPE_DEAUTH,
1344 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1345 NULL, true);
1e4dcd01
JO
1346}
1347
1348void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB
1349{
1350 struct ieee80211_sub_if_data *sdata =
1351 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1352 u.mgd.beacon_connection_loss_work);
b291ba11 1353
1e4dcd01
JO
1354 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1355 __ieee80211_connection_loss(sdata);
1356 else
1357 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB
1358}
1359
04de8381
KV
1360void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1361{
1362 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1363 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1364
b5878a2d
JB
1365 trace_api_beacon_loss(sdata);
1366
1e4dcd01
JO
1367 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1368 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV
1369}
1370EXPORT_SYMBOL(ieee80211_beacon_loss);
1371
1e4dcd01
JO
1372void ieee80211_connection_loss(struct ieee80211_vif *vif)
1373{
1374 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1375 struct ieee80211_hw *hw = &sdata->local->hw;
1376
b5878a2d
JB
1377 trace_api_connection_loss(sdata);
1378
1e4dcd01
JO
1379 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1380 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1381}
1382EXPORT_SYMBOL(ieee80211_connection_loss);
1383
1384
77fdaa12
JB
1385static enum rx_mgmt_action __must_check
1386ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1387 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1388{
46900298 1389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1390 const u8 *bssid = NULL;
f0706e82
JB
1391 u16 reason_code;
1392
f4ea83dd 1393 if (len < 24 + 2)
77fdaa12 1394 return RX_MGMT_NONE;
f0706e82 1395
77fdaa12
JB
1396 ASSERT_MGD_MTX(ifmgd);
1397
0c1ad2ca 1398 bssid = ifmgd->associated->bssid;
f0706e82
JB
1399
1400 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1401
77fdaa12 1402 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1403 sdata->name, bssid, reason_code);
77fdaa12 1404
53f73c09 1405 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1406 mutex_lock(&sdata->local->mtx);
63f170e0 1407 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1408 mutex_unlock(&sdata->local->mtx);
f0706e82 1409
77fdaa12 1410 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB
1411}
1412
1413
77fdaa12
JB
1414static enum rx_mgmt_action __must_check
1415ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1416 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1417{
46900298 1418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB
1419 u16 reason_code;
1420
f4ea83dd 1421 if (len < 24 + 2)
77fdaa12 1422 return RX_MGMT_NONE;
f0706e82 1423
77fdaa12
JB
1424 ASSERT_MGD_MTX(ifmgd);
1425
1426 if (WARN_ON(!ifmgd->associated))
1427 return RX_MGMT_NONE;
1428
0c1ad2ca 1429 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1430 return RX_MGMT_NONE;
f0706e82
JB
1431
1432 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1433
0ff71613 1434 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1435 sdata->name, mgmt->sa, reason_code);
f0706e82 1436
53f73c09 1437 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1438 mutex_lock(&sdata->local->mtx);
bc83b681 1439 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1440 mutex_unlock(&sdata->local->mtx);
77fdaa12 1441 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB
1442}
1443
1444
af6b6374
JB
1445static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1446 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1447{
af6b6374 1448 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1450 struct ieee80211_local *local = sdata->local;
8318d78a 1451 struct ieee80211_supported_band *sband;
f0706e82 1452 struct sta_info *sta;
0c1ad2ca 1453 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1454 u8 *pos;
881d948c 1455 u32 rates, basic_rates;
af6b6374 1456 u16 capab_info, aid;
f0706e82 1457 struct ieee802_11_elems elems;
bda3933a 1458 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1459 u32 changed = 0;
5d1ec85f
JB
1460 int i, j, err;
1461 bool have_higher_than_11mbit = false;
ae5eb026 1462 u16 ap_ht_cap_flags;
f0706e82 1463
af6b6374 1464 /* AssocResp and ReassocResp have identical structure */
f0706e82 1465
f0706e82 1466 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1467 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1468
1dd84aa2
JB
1469 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1470 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1471 "set\n", sdata->name, aid);
1dd84aa2
JB
1472 aid &= ~(BIT(15) | BIT(14));
1473
af6b6374
JB
1474 pos = mgmt->u.assoc_resp.variable;
1475 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1476
f0706e82
JB
1477 if (!elems.supp_rates) {
1478 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1479 sdata->name);
af6b6374 1480 return false;
f0706e82
JB
1481 }
1482
46900298 1483 ifmgd->aid = aid;
f0706e82 1484
0c1ad2ca 1485 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1486 if (!sta) {
5d1ec85f
JB
1487 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1488 " the AP\n", sdata->name);
af6b6374 1489 return false;
77fdaa12 1490 }
05e5e883 1491
5d1ec85f
JB
1492 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1493 WLAN_STA_ASSOC_AP);
1494 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1495 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1496
60f8b39c
JB
1497 rates = 0;
1498 basic_rates = 0;
e7480bbb 1499 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1500
60f8b39c
JB
1501 for (i = 0; i < elems.supp_rates_len; i++) {
1502 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1503 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1504
60f8b39c
JB
1505 if (rate > 110)
1506 have_higher_than_11mbit = true;
1507
1508 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1509 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1510 rates |= BIT(j);
d61272cb
TW
1511 if (is_basic)
1512 basic_rates |= BIT(j);
1513 break;
1514 }
f709fc69 1515 }
f709fc69
LCC
1516 }
1517
60f8b39c
JB
1518 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1519 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1520 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1521
60f8b39c
JB
1522 if (rate > 110)
1523 have_higher_than_11mbit = true;
f0706e82 1524
60f8b39c 1525 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1526 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1527 rates |= BIT(j);
d61272cb
TW
1528 if (is_basic)
1529 basic_rates |= BIT(j);
1530 break;
1531 }
60f8b39c 1532 }
1ebebea8 1533 }
f0706e82 1534
e7480bbb 1535 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1536 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB
1537
1538 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1539 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB
1540 have_higher_than_11mbit)
1541 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1542 else
1543 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1544
ab1faead 1545 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1546 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1547 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB
1548
1549 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1550
4b7679a5 1551 rate_control_rate_init(sta);
f0706e82 1552
46900298 1553 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM
1554 set_sta_flags(sta, WLAN_STA_MFP);
1555
ddf4ac53 1556 if (elems.wmm_param)
60f8b39c 1557 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1558
5d1ec85f
JB
1559 err = sta_info_insert(sta);
1560 sta = NULL;
1561 if (err) {
1562 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1563 " the AP (error %d)\n", sdata->name, err);
90be561b 1564 return false;
ddf4ac53
JB
1565 }
1566
f2176d72
JO
1567 /*
1568 * Always handle WMM once after association regardless
1569 * of the first value the AP uses. Setting -1 here has
1570 * that effect because the AP values is an unsigned
1571 * 4-bit value.
1572 */
1573 ifmgd->wmm_last_param_set = -1;
1574
ddf4ac53 1575 if (elems.wmm_param)
4ced3f74 1576 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1577 elems.wmm_param_len);
aa837e1d
JB
1578 else
1579 ieee80211_set_wmm_default(sdata);
f0706e82 1580
e4da8c37
JB
1581 local->oper_channel = wk->chan;
1582
ae5eb026 1583 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1584 (sdata->local->hw.queues >= 4) &&
ab1faead 1585 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1586 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1587 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1588
60f8b39c
JB
1589 /* set AID and assoc capability,
1590 * ieee80211_set_associated() will tell the driver */
1591 bss_conf->aid = aid;
1592 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1593 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1594
d524215f
FF
1595 /*
1596 * If we're using 4-addr mode, let the AP know that we're
1597 * doing so, so that it can create the STA VLAN on its side
1598 */
1599 if (ifmgd->use_4addr)
1600 ieee80211_send_4addr_nullfunc(local, sdata);
1601
15b7b062 1602 /*
b291ba11
JB
1603 * Start timer to probe the connection to the AP now.
1604 * Also start the timer that will detect beacon loss.
15b7b062 1605 */
b291ba11 1606 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1607 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1608
af6b6374 1609 return true;
f0706e82
JB
1610}
1611
1612
98c8fccf
JB
1613static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1614 struct ieee80211_mgmt *mgmt,
1615 size_t len,
1616 struct ieee80211_rx_status *rx_status,
1617 struct ieee802_11_elems *elems,
1618 bool beacon)
1619{
1620 struct ieee80211_local *local = sdata->local;
1621 int freq;
c2b13452 1622 struct ieee80211_bss *bss;
98c8fccf 1623 struct ieee80211_channel *channel;
56007a02
JB
1624 bool need_ps = false;
1625
1626 if (sdata->u.mgd.associated) {
1627 bss = (void *)sdata->u.mgd.associated->priv;
1628 /* not previously set so we may need to recalc */
1629 need_ps = !bss->dtim_period;
1630 }
98c8fccf
JB
1631
1632 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR
1633 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1634 rx_status->band);
98c8fccf
JB
1635 else
1636 freq = rx_status->freq;
1637
1638 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1639
1640 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1641 return;
1642
98c8fccf 1643 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1644 channel, beacon);
77fdaa12
JB
1645 if (bss)
1646 ieee80211_rx_bss_put(local, bss);
1647
1648 if (!sdata->u.mgd.associated)
98c8fccf
JB
1649 return;
1650
56007a02
JB
1651 if (need_ps) {
1652 mutex_lock(&local->iflist_mtx);
1653 ieee80211_recalc_ps(local, -1);
1654 mutex_unlock(&local->iflist_mtx);
1655 }
1656
c481ec97 1657 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1658 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1659 ETH_ALEN) == 0)) {
c481ec97
S
1660 struct ieee80211_channel_sw_ie *sw_elem =
1661 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB
1662 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1663 bss, rx_status->mactime);
c481ec97 1664 }
f0706e82
JB
1665}
1666
1667
f698d856 1668static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1669 struct sk_buff *skb)
f0706e82 1670{
af6b6374 1671 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1672 struct ieee80211_if_managed *ifmgd;
af6b6374
JB
1673 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1674 size_t baselen, len = skb->len;
ae6a44e3
EK
1675 struct ieee802_11_elems elems;
1676
15b7b062
KV
1677 ifmgd = &sdata->u.mgd;
1678
77fdaa12
JB
1679 ASSERT_MGD_MTX(ifmgd);
1680
47846c9b 1681 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW
1682 return; /* ignore ProbeResp to foreign address */
1683
ae6a44e3
EK
1684 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1685 if (baselen > len)
1686 return;
1687
1688 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1689 &elems);
1690
98c8fccf 1691 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1692
77fdaa12 1693 if (ifmgd->associated &&
4e5ff376
FF
1694 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1695 ieee80211_reset_ap_probe(sdata);
f0706e82
JB
1696}
1697
d91f36db
JB
1698/*
1699 * This is the canonical list of information elements we care about,
1700 * the filter code also gives us all changes to the Microsoft OUI
1701 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1702 *
1703 * We implement beacon filtering in software since that means we can
1704 * avoid processing the frame here and in cfg80211, and userspace
1705 * will not be able to tell whether the hardware supports it or not.
1706 *
1707 * XXX: This list needs to be dynamic -- userspace needs to be able to
1708 * add items it requires. It also needs to be able to tell us to
1709 * look out for other vendor IEs.
1710 */
1711static const u64 care_about_ies =
1d4df3a5
JB
1712 (1ULL << WLAN_EID_COUNTRY) |
1713 (1ULL << WLAN_EID_ERP_INFO) |
1714 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1715 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1716 (1ULL << WLAN_EID_HT_CAPABILITY) |
1717 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1718
f698d856 1719static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1720 struct ieee80211_mgmt *mgmt,
1721 size_t len,
1722 struct ieee80211_rx_status *rx_status)
1723{
d91f36db 1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1725 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB
1726 size_t baselen;
1727 struct ieee802_11_elems elems;
f698d856 1728 struct ieee80211_local *local = sdata->local;
471b3efd 1729 u32 changed = 0;
d91f36db 1730 bool erp_valid, directed_tim = false;
7a5158ef 1731 u8 erp_value = 0;
d91f36db 1732 u32 ncrc;
77fdaa12
JB
1733 u8 *bssid;
1734
1735 ASSERT_MGD_MTX(ifmgd);
f0706e82 1736
ae6a44e3
EK
1737 /* Process beacon from the current BSS */
1738 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1739 if (baselen > len)
1740 return;
1741
d91f36db 1742 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1743 return;
f0706e82 1744
b291ba11
JB
1745 /*
1746 * We might have received a number of frames, among them a
1747 * disassoc frame and a beacon...
1748 */
1749 if (!ifmgd->associated)
77fdaa12
JB
1750 return;
1751
0c1ad2ca 1752 bssid = ifmgd->associated->bssid;
77fdaa12 1753
b291ba11
JB
1754 /*
1755 * And in theory even frames from a different AP we were just
1756 * associated to a split-second ago!
1757 */
1758 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB
1759 return;
1760
17e4ec14
JM
1761 /* Track average RSSI from the Beacon frames of the current AP */
1762 ifmgd->last_beacon_signal = rx_status->signal;
1763 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1764 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1765 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1766 ifmgd->last_cqm_event_signal = 0;
391a200a 1767 ifmgd->count_beacon_signal = 1;
615f7b9b 1768 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM
1769 } else {
1770 ifmgd->ave_beacon_signal =
1771 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1772 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1773 ifmgd->ave_beacon_signal) / 16;
391a200a 1774 ifmgd->count_beacon_signal++;
17e4ec14 1775 }
615f7b9b
MV
1776
1777 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1778 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1779 int sig = ifmgd->ave_beacon_signal;
1780 int last_sig = ifmgd->last_ave_beacon_signal;
1781
1782 /*
1783 * if signal crosses either of the boundaries, invoke callback
1784 * with appropriate parameters
1785 */
1786 if (sig > ifmgd->rssi_max_thold &&
1787 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1788 ifmgd->last_ave_beacon_signal = sig;
1789 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1790 } else if (sig < ifmgd->rssi_min_thold &&
1791 (last_sig >= ifmgd->rssi_max_thold ||
1792 last_sig == 0)) {
1793 ifmgd->last_ave_beacon_signal = sig;
1794 drv_rssi_callback(local, RSSI_EVENT_LOW);
1795 }
1796 }
1797
17e4ec14 1798 if (bss_conf->cqm_rssi_thold &&
391a200a 1799 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM
1800 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1801 int sig = ifmgd->ave_beacon_signal / 16;
1802 int last_event = ifmgd->last_cqm_event_signal;
1803 int thold = bss_conf->cqm_rssi_thold;
1804 int hyst = bss_conf->cqm_rssi_hyst;
1805 if (sig < thold &&
1806 (last_event == 0 || sig < last_event - hyst)) {
1807 ifmgd->last_cqm_event_signal = sig;
1808 ieee80211_cqm_rssi_notify(
1809 &sdata->vif,
1810 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1811 GFP_KERNEL);
1812 } else if (sig > thold &&
1813 (last_event == 0 || sig > last_event + hyst)) {
1814 ifmgd->last_cqm_event_signal = sig;
1815 ieee80211_cqm_rssi_notify(
1816 &sdata->vif,
1817 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1818 GFP_KERNEL);
1819 }
1820 }
1821
b291ba11 1822 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM
1823#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1824 if (net_ratelimit()) {
1825 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1826 "to a received beacon\n", sdata->name);
92778180
JM
1827 }
1828#endif
b291ba11 1829 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB
1830 mutex_lock(&local->iflist_mtx);
1831 ieee80211_recalc_ps(local, -1);
1832 mutex_unlock(&local->iflist_mtx);
92778180
JM
1833 }
1834
b291ba11
JB
1835 /*
1836 * Push the beacon loss detection into the future since
1837 * we are processing a beacon from the AP just now.
1838 */
d3a910a8 1839 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1840
d91f36db
JB
1841 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1842 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1843 len - baselen, &elems,
1844 care_about_ies, ncrc);
1845
1846 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB
1847 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1848 ifmgd->aid);
d91f36db 1849
d8ec4433 1850 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM
1851 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1852 true);
d91f36db 1853
4ced3f74 1854 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM
1855 elems.wmm_param_len);
1856 }
fe3fa827 1857
25c9c875 1858 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1859 if (directed_tim) {
572e0012
KV
1860 if (local->hw.conf.dynamic_ps_timeout > 0) {
1861 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1862 ieee80211_hw_config(local,
1863 IEEE80211_CONF_CHANGE_PS);
1864 ieee80211_send_nullfunc(local, sdata, 0);
1865 } else {
1866 local->pspolling = true;
1867
1868 /*
1869 * Here is assumed that the driver will be
1870 * able to send ps-poll frame and receive a
1871 * response even though power save mode is
1872 * enabled, but some drivers might require
1873 * to disable power save here. This needs
1874 * to be investigated.
1875 */
1876 ieee80211_send_pspoll(local, sdata);
1877 }
a97b77b9
VN
1878 }
1879 }
7a5158ef 1880
d8ec4433 1881 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM
1882 return;
1883 ifmgd->beacon_crc = ncrc;
d8ec4433 1884 ifmgd->beacon_crc_valid = true;
30196673 1885
7a5158ef
JB
1886 if (elems.erp_info && elems.erp_info_len >= 1) {
1887 erp_valid = true;
1888 erp_value = elems.erp_info[0];
1889 } else {
1890 erp_valid = false;
50c4afb9 1891 }
7a5158ef
JB
1892 changed |= ieee80211_handle_bss_capability(sdata,
1893 le16_to_cpu(mgmt->u.beacon.capab_info),
1894 erp_valid, erp_value);
f0706e82 1895
d3c990fb 1896
53d6f81c 1897 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1898 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB
1899 struct sta_info *sta;
1900 struct ieee80211_supported_band *sband;
1901 u16 ap_ht_cap_flags;
1902
1903 rcu_read_lock();
1904
abe60632 1905 sta = sta_info_get(sdata, bssid);
77fdaa12 1906 if (WARN_ON(!sta)) {
ae5eb026
JB
1907 rcu_read_unlock();
1908 return;
1909 }
1910
1911 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1912
1913 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1914 elems.ht_cap_elem, &sta->sta.ht_cap);
1915
1916 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1917
1918 rcu_read_unlock();
1919
1920 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1921 bssid, ap_ht_cap_flags);
d3c990fb
RR
1922 }
1923
8b19e6ca 1924 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1925 if (elems.country_elem) {
a8302de9
VT
1926 /* TODO: IBSS also needs this */
1927 if (elems.pwr_constr_elem)
1928 ieee80211_handle_pwr_constr(sdata,
1929 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1930 elems.pwr_constr_elem,
1931 elems.pwr_constr_elem_len);
3f2355cb
LR
1932 }
1933
471b3efd 1934 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB
1935}
1936
1fa57d01
JB
1937void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1938 struct sk_buff *skb)
f0706e82 1939{
77fdaa12 1940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1941 struct ieee80211_rx_status *rx_status;
f0706e82 1942 struct ieee80211_mgmt *mgmt;
77fdaa12 1943 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB
1944 u16 fc;
1945
f0706e82
JB
1946 rx_status = (struct ieee80211_rx_status *) skb->cb;
1947 mgmt = (struct ieee80211_mgmt *) skb->data;
1948 fc = le16_to_cpu(mgmt->frame_control);
1949
77fdaa12
JB
1950 mutex_lock(&ifmgd->mtx);
1951
1952 if (ifmgd->associated &&
0c1ad2ca 1953 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB
1954 switch (fc & IEEE80211_FCTL_STYPE) {
1955 case IEEE80211_STYPE_BEACON:
1956 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1957 rx_status);
1958 break;
1959 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1960 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB
1961 break;
1962 case IEEE80211_STYPE_DEAUTH:
63f170e0 1963 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB
1964 break;
1965 case IEEE80211_STYPE_DISASSOC:
1966 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1967 break;
1968 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1969 switch (mgmt->u.action.category) {
8b9a4e6e
JB
1970 case WLAN_CATEGORY_SPECTRUM_MGMT:
1971 ieee80211_sta_process_chanswitch(sdata,
1972 &mgmt->u.action.u.chan_switch.sw_elem,
1973 (void *)ifmgd->associated->priv,
1974 rx_status->mactime);
1975 break;
1976 }
77fdaa12
JB
1977 }
1978 mutex_unlock(&ifmgd->mtx);
1979
1980 switch (rma) {
1981 case RX_MGMT_NONE:
1982 /* no action */
1983 break;
1984 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1985 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB
1986 break;
1987 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1988 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB
1989 break;
1990 default:
1991 WARN(1, "unexpected: %d", rma);
1992 }
36b3a628 1993 return;
77fdaa12
JB
1994 }
1995
77fdaa12
JB
1996 mutex_unlock(&ifmgd->mtx);
1997
63f170e0 1998 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB
1999 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2000 struct ieee80211_local *local = sdata->local;
2001 struct ieee80211_work *wk;
2002
a1699b75 2003 mutex_lock(&local->mtx);
b054b747
JB
2004 list_for_each_entry(wk, &local->work_list, list) {
2005 if (wk->sdata != sdata)
2006 continue;
2007
e5b900d2
JB
2008 if (wk->type != IEEE80211_WORK_ASSOC &&
2009 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB
2010 continue;
2011
2012 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2013 continue;
2014 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2015 continue;
2016
2017 /*
2018 * Printing the message only here means we can't
2019 * spuriously print it, but it also means that it
2020 * won't be printed when the frame comes in before
2021 * we even tried to associate or in similar cases.
2022 *
2023 * Ultimately, I suspect cfg80211 should print the
2024 * messages instead.
2025 */
2026 printk(KERN_DEBUG
2027 "%s: deauthenticated from %pM (Reason: %u)\n",
2028 sdata->name, mgmt->bssid,
2029 le16_to_cpu(mgmt->u.deauth.reason_code));
2030
2031 list_del_rcu(&wk->list);
2032 free_work(wk);
2033 break;
2034 }
a1699b75 2035 mutex_unlock(&local->mtx);
f0706e82 2036
ce470613 2037 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2038 }
f0706e82
JB
2039}
2040
9c6bd790 2041static void ieee80211_sta_timer(unsigned long data)
f0706e82 2042{
60f8b39c
JB
2043 struct ieee80211_sub_if_data *sdata =
2044 (struct ieee80211_sub_if_data *) data;
46900298 2045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2046 struct ieee80211_local *local = sdata->local;
f0706e82 2047
5bb644a0
JB
2048 if (local->quiescing) {
2049 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2050 return;
2051 }
2052
64592c8f 2053 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB
2054}
2055
04ac3c0e 2056static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2057 u8 *bssid, u8 reason)
04ac3c0e
FF
2058{
2059 struct ieee80211_local *local = sdata->local;
2060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2061
2062 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2063 IEEE80211_STA_BEACON_POLL);
2064
2065 ieee80211_set_disassoc(sdata, true, true);
2066 mutex_unlock(&ifmgd->mtx);
2067 mutex_lock(&local->mtx);
2068 ieee80211_recalc_idle(local);
2069 mutex_unlock(&local->mtx);
2070 /*
2071 * must be outside lock due to cfg80211,
2072 * but that's not a problem.
2073 */
2074 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2075 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF
2076 NULL, true);
2077 mutex_lock(&ifmgd->mtx);
2078}
2079
1fa57d01 2080void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2081{
9c6bd790 2082 struct ieee80211_local *local = sdata->local;
1fa57d01 2083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2084
77fdaa12
JB
2085 /* then process the rest of the work */
2086 mutex_lock(&ifmgd->mtx);
2087
b291ba11
JB
2088 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2089 IEEE80211_STA_CONNECTION_POLL) &&
2090 ifmgd->associated) {
a43abf29 2091 u8 bssid[ETH_ALEN];
72a8a3ed 2092 int max_tries;
a43abf29 2093
0c1ad2ca 2094 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2095
72a8a3ed 2096 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2097 max_tries = max_nullfunc_tries;
72a8a3ed 2098 else
180205bd 2099 max_tries = max_probe_tries;
72a8a3ed 2100
4e5ff376
FF
2101 /* ACK received for nullfunc probing frame */
2102 if (!ifmgd->probe_send_count)
2103 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF
2104 else if (ifmgd->nullfunc_failed) {
2105 if (ifmgd->probe_send_count < max_tries) {
2106#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2107 wiphy_debug(local->hw.wiphy,
2108 "%s: No ack for nullfunc frame to"
bfc31df3 2109 " AP %pM, try %d/%i\n",
04ac3c0e 2110 sdata->name, bssid,
bfc31df3 2111 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF
2112#endif
2113 ieee80211_mgd_probe_ap_send(sdata);
2114 } else {
2115#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2116 wiphy_debug(local->hw.wiphy,
2117 "%s: No ack for nullfunc frame to"
2118 " AP %pM, disconnecting.\n",
c658e5db 2119 sdata->name, bssid);
04ac3c0e 2120#endif
95acac61
JB
2121 ieee80211_sta_connection_lost(sdata, bssid,
2122 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF
2123 }
2124 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2125 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF
2126 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2127#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2128 wiphy_debug(local->hw.wiphy,
2129 "%s: Failed to send nullfunc to AP %pM"
2130 " after %dms, disconnecting.\n",
2131 sdata->name,
180205bd 2132 bssid, probe_wait_ms);
04ac3c0e 2133#endif
95acac61
JB
2134 ieee80211_sta_connection_lost(sdata, bssid,
2135 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2136 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2137#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG
2138 wiphy_debug(local->hw.wiphy,
2139 "%s: No probe response from AP %pM"
bfc31df3 2140 " after %dms, try %d/%i\n",
b38afa87 2141 sdata->name,
180205bd 2142 bssid, probe_wait_ms,
bfc31df3 2143 ifmgd->probe_send_count, max_tries);
a43abf29
ML
2144#endif
2145 ieee80211_mgd_probe_ap_send(sdata);
2146 } else {
b291ba11
JB
2147 /*
2148 * We actually lost the connection ... or did we?
2149 * Let's make sure!
2150 */
b38afa87
BG
2151 wiphy_debug(local->hw.wiphy,
2152 "%s: No probe response from AP %pM"
2153 " after %dms, disconnecting.\n",
2154 sdata->name,
180205bd 2155 bssid, probe_wait_ms);
04ac3c0e 2156
95acac61
JB
2157 ieee80211_sta_connection_lost(sdata, bssid,
2158 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB
2159 }
2160 }
2161
77fdaa12 2162 mutex_unlock(&ifmgd->mtx);
f0706e82
JB
2163}
2164
b291ba11
JB
2165static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2166{
2167 struct ieee80211_sub_if_data *sdata =
2168 (struct ieee80211_sub_if_data *) data;
2169 struct ieee80211_local *local = sdata->local;
2170
2171 if (local->quiescing)
2172 return;
2173
1e4dcd01
JO
2174 ieee80211_queue_work(&sdata->local->hw,
2175 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB
2176}
2177
2178static void ieee80211_sta_conn_mon_timer(unsigned long data)
2179{
2180 struct ieee80211_sub_if_data *sdata =
2181 (struct ieee80211_sub_if_data *) data;
2182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2183 struct ieee80211_local *local = sdata->local;
2184
2185 if (local->quiescing)
2186 return;
2187
42935eca 2188 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB
2189}
2190
2191static void ieee80211_sta_monitor_work(struct work_struct *work)
2192{
2193 struct ieee80211_sub_if_data *sdata =
2194 container_of(work, struct ieee80211_sub_if_data,
2195 u.mgd.monitor_work);
2196
2197 ieee80211_mgd_probe_ap(sdata, false);
2198}
2199
9c6bd790
JB
2200static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2201{
ad935687 2202 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB
2203 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2204 IEEE80211_STA_CONNECTION_POLL);
ad935687 2205
b291ba11 2206 /* let's probe the connection once */
42935eca 2207 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB
2208 &sdata->u.mgd.monitor_work);
2209 /* and do all the other regular work too */
64592c8f 2210 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2211 }
9c6bd790 2212}
f0706e82 2213
5bb644a0
JB
2214#ifdef CONFIG_PM
2215void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2216{
2217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2218
2219 /*
2220 * we need to use atomic bitops for the running bits
2221 * only because both timers might fire at the same
2222 * time -- the code here is properly synchronised.
2223 */
2224
d1f5b7a3
JB
2225 cancel_work_sync(&ifmgd->request_smps_work);
2226
1e4dcd01 2227 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB
2228 if (del_timer_sync(&ifmgd->timer))
2229 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2230
2231 cancel_work_sync(&ifmgd->chswitch_work);
2232 if (del_timer_sync(&ifmgd->chswitch_timer))
2233 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB
2234
2235 cancel_work_sync(&ifmgd->monitor_work);
2236 /* these will just be re-established on connection */
2237 del_timer_sync(&ifmgd->conn_mon_timer);
2238 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB
2239}
2240
2241void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2242{
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2244
676b58c2
RM
2245 if (!ifmgd->associated)
2246 return;
2247
95acac61
JB
2248 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2249 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2250 mutex_lock(&ifmgd->mtx);
2251 if (ifmgd->associated) {
2252#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2253 wiphy_debug(sdata->local->hw.wiphy,
2254 "%s: driver requested disconnect after resume.\n",
2255 sdata->name);
2256#endif
2257 ieee80211_sta_connection_lost(sdata,
2258 ifmgd->associated->bssid,
2259 WLAN_REASON_UNSPECIFIED);
2260 mutex_unlock(&ifmgd->mtx);
2261 return;
2262 }
2263 mutex_unlock(&ifmgd->mtx);
2264 }
2265
5bb644a0
JB
2266 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2267 add_timer(&ifmgd->timer);
2268 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2269 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2270 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2271 ieee80211_restart_sta_timer(sdata);
a6af1d84 2272 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB
2273}
2274#endif
2275
9c6bd790
JB
2276/* interface setup */
2277void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2278{
46900298 2279 struct ieee80211_if_managed *ifmgd;
988c0f72 2280
46900298 2281 ifmgd = &sdata->u.mgd;
b291ba11 2282 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2283 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO
2284 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2285 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2286 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2287 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2288 (unsigned long) sdata);
b291ba11
JB
2289 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2290 (unsigned long) sdata);
2291 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2292 (unsigned long) sdata);
46900298 2293 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2294 (unsigned long) sdata);
9c6bd790 2295
ab1faead 2296 ifmgd->flags = 0;
bbbdff9e 2297
77fdaa12 2298 mutex_init(&ifmgd->mtx);
0f78231b
JB
2299
2300 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2301 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2302 else
2303 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB
2304}
2305
77fdaa12
JB
2306/* scan finished notification */
2307void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2308{
77fdaa12 2309 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2310
77fdaa12
JB
2311 /* Restart STA timers */
2312 rcu_read_lock();
2313 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2314 ieee80211_restart_sta_timer(sdata);
2315 rcu_read_unlock();
2316}
60f8b39c 2317
77fdaa12
JB
2318int ieee80211_max_network_latency(struct notifier_block *nb,
2319 unsigned long data, void *dummy)
2320{
2321 s32 latency_usec = (s32) data;
2322 struct ieee80211_local *local =
2323 container_of(nb, struct ieee80211_local,
2324 network_latency_notifier);
1fa6f4af 2325
77fdaa12
JB
2326 mutex_lock(&local->iflist_mtx);
2327 ieee80211_recalc_ps(local, latency_usec);
2328 mutex_unlock(&local->iflist_mtx);
dfe67012 2329
77fdaa12 2330 return 0;
9c6bd790
JB
2331}
2332
77fdaa12 2333/* config hooks */
af6b6374
JB
2334static enum work_done_result
2335ieee80211_probe_auth_done(struct ieee80211_work *wk,
2336 struct sk_buff *skb)
2337{
2338 if (!skb) {
2339 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2340 return WORK_DONE_DESTROY;
2341 }
2342
2343 if (wk->type == IEEE80211_WORK_AUTH) {
2344 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2345 return WORK_DONE_DESTROY;
2346 }
2347
2348 mutex_lock(&wk->sdata->u.mgd.mtx);
2349 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2350 mutex_unlock(&wk->sdata->u.mgd.mtx);
2351
2352 wk->type = IEEE80211_WORK_AUTH;
2353 wk->probe_auth.tries = 0;
2354 return WORK_DONE_REQUEUE;
2355}
2356
77fdaa12
JB
2357int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2358 struct cfg80211_auth_request *req)
9c6bd790 2359{
77fdaa12 2360 const u8 *ssid;
f679f65d 2361 struct ieee80211_work *wk;
77fdaa12 2362 u16 auth_alg;
9c6bd790 2363
d5cdfacb
JM
2364 if (req->local_state_change)
2365 return 0; /* no need to update mac80211 state */
2366
77fdaa12
JB
2367 switch (req->auth_type) {
2368 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2369 auth_alg = WLAN_AUTH_OPEN;
2370 break;
2371 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB
2372 if (IS_ERR(sdata->local->wep_tx_tfm))
2373 return -EOPNOTSUPP;
77fdaa12
JB
2374 auth_alg = WLAN_AUTH_SHARED_KEY;
2375 break;
2376 case NL80211_AUTHTYPE_FT:
2377 auth_alg = WLAN_AUTH_FT;
2378 break;
2379 case NL80211_AUTHTYPE_NETWORK_EAP:
2380 auth_alg = WLAN_AUTH_LEAP;
2381 break;
2382 default:
2383 return -EOPNOTSUPP;
60f8b39c 2384 }
77fdaa12
JB
2385
2386 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2387 if (!wk)
9c6bd790 2388 return -ENOMEM;
77fdaa12 2389
5e124bd5 2390 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB
2391
2392 if (req->ie && req->ie_len) {
2393 memcpy(wk->ie, req->ie, req->ie_len);
2394 wk->ie_len = req->ie_len;
9c6bd790 2395 }
77fdaa12 2396
fffd0934 2397 if (req->key && req->key_len) {
af6b6374
JB
2398 wk->probe_auth.key_len = req->key_len;
2399 wk->probe_auth.key_idx = req->key_idx;
2400 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB
2401 }
2402
77fdaa12 2403 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB
2404 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2405 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2406
af6b6374
JB
2407 wk->probe_auth.algorithm = auth_alg;
2408 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2409
070bb547
JB
2410 /* if we already have a probe, don't probe again */
2411 if (req->bss->proberesp_ies)
2412 wk->type = IEEE80211_WORK_AUTH;
2413 else
2414 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2415 wk->chan = req->bss->channel;
4d51e149 2416 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB
2417 wk->sdata = sdata;
2418 wk->done = ieee80211_probe_auth_done;
77fdaa12 2419
af6b6374 2420 ieee80211_add_work(wk);
9c6bd790 2421 return 0;
60f8b39c
JB
2422}
2423
af6b6374
JB
2424static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2425 struct sk_buff *skb)
2426{
2427 struct ieee80211_mgmt *mgmt;
e5b900d2
JB
2428 struct ieee80211_rx_status *rx_status;
2429 struct ieee802_11_elems elems;
af6b6374
JB
2430 u16 status;
2431
2432 if (!skb) {
2433 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2434 return WORK_DONE_DESTROY;
2435 }
2436
e5b900d2
JB
2437 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2438 mutex_lock(&wk->sdata->u.mgd.mtx);
2439 rx_status = (void *) skb->cb;
2440 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2441 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2442 &elems, true);
2443 mutex_unlock(&wk->sdata->u.mgd.mtx);
2444
2445 wk->type = IEEE80211_WORK_ASSOC;
2446 /* not really done yet */
2447 return WORK_DONE_REQUEUE;
2448 }
2449
af6b6374
JB
2450 mgmt = (void *)skb->data;
2451 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2452
2453 if (status == WLAN_STATUS_SUCCESS) {
2454 mutex_lock(&wk->sdata->u.mgd.mtx);
2455 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2456 mutex_unlock(&wk->sdata->u.mgd.mtx);
2457 /* oops -- internal error -- send timeout for now */
2458 cfg80211_send_assoc_timeout(wk->sdata->dev,
2459 wk->filter_ta);
2460 return WORK_DONE_DESTROY;
2461 }
68542962
JO
2462
2463 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB
2464 }
2465
2466 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2467 return WORK_DONE_DESTROY;
2468}
2469
77fdaa12
JB
2470int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2471 struct cfg80211_assoc_request *req)
f0706e82 2472{
77fdaa12 2473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2474 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2475 struct ieee80211_work *wk;
63f170e0 2476 const u8 *ssid;
af6b6374 2477 int i;
f0706e82 2478
77fdaa12 2479 mutex_lock(&ifmgd->mtx);
af6b6374 2480 if (ifmgd->associated) {
9c87ba67
JM
2481 if (!req->prev_bssid ||
2482 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2483 ETH_ALEN)) {
2484 /*
2485 * We are already associated and the request was not a
2486 * reassociation request from the current BSS, so
2487 * reject it.
2488 */
2489 mutex_unlock(&ifmgd->mtx);
2490 return -EALREADY;
2491 }
2492
2493 /* Trying to reassociate - clear previous association state */
53f73c09 2494 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB
2495 }
2496 mutex_unlock(&ifmgd->mtx);
77fdaa12 2497
63f170e0 2498 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB
2499 if (!wk)
2500 return -ENOMEM;
77fdaa12 2501
77fdaa12 2502 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2503 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2504
d8ec4433
JO
2505 ifmgd->beacon_crc_valid = false;
2506
77fdaa12
JB
2507 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2508 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2509 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2510 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2511 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2512
77fdaa12
JB
2513
2514 if (req->ie && req->ie_len) {
2515 memcpy(wk->ie, req->ie, req->ie_len);
2516 wk->ie_len = req->ie_len;
2517 } else
2518 wk->ie_len = 0;
2519
0c1ad2ca 2520 wk->assoc.bss = req->bss;
f679f65d 2521
af6b6374 2522 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2523
af6b6374
JB
2524 /* new association always uses requested smps mode */
2525 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2526 if (ifmgd->powersave)
2527 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2528 else
2529 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2530 } else
2531 ifmgd->ap_smps = ifmgd->req_smps;
2532
2533 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB
2534 /*
2535 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2536 * We still associate in non-HT mode (11a/b/g) if any one of these
2537 * ciphers is configured as pairwise.
2538 * We can set this to true for non-11n hardware, that'll be checked
2539 * separately along with the peer capabilities.
2540 */
af6b6374 2541 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2542 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB
2543 wk->assoc.wmm_used = bss->wmm_used;
2544 wk->assoc.supp_rates = bss->supp_rates;
2545 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB
2546 wk->assoc.ht_information_ie =
2547 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2548
ab13315a
KV
2549 if (bss->wmm_used && bss->uapsd_supported &&
2550 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2551 wk->assoc.uapsd_used = true;
2552 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2553 } else {
2554 wk->assoc.uapsd_used = false;
2555 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2556 }
2557
63f170e0 2558 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB
2559 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2560 wk->assoc.ssid_len = ssid[1];
63f170e0 2561
77fdaa12 2562 if (req->prev_bssid)
f679f65d 2563 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2564
f679f65d 2565 wk->chan = req->bss->channel;
4d51e149 2566 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB
2567 wk->sdata = sdata;
2568 wk->done = ieee80211_assoc_done;
e5b900d2
JB
2569 if (!bss->dtim_period &&
2570 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2571 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2572 else
2573 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB
2574
2575 if (req->use_mfp) {
2576 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2577 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2578 } else {
2579 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2580 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2581 }
2582
2583 if (req->crypto.control_port)
2584 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2585 else
2586 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2587
a621fa4d
JB
2588 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2589 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2590
af6b6374
JB
2591 ieee80211_add_work(wk);
2592 return 0;
f0706e82
JB
2593}
2594
77fdaa12 2595int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB
2596 struct cfg80211_deauth_request *req,
2597 void *cookie)
f0706e82 2598{
af6b6374 2599 struct ieee80211_local *local = sdata->local;
46900298 2600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2601 struct ieee80211_work *wk;
05e48e8e
JM
2602 u8 bssid[ETH_ALEN];
2603 bool assoc_bss = false;
f0706e82 2604
77fdaa12
JB
2605 mutex_lock(&ifmgd->mtx);
2606
05e48e8e 2607 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2608 if (ifmgd->associated == req->bss) {
53f73c09 2609 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2610 mutex_unlock(&ifmgd->mtx);
05e48e8e 2611 assoc_bss = true;
af6b6374
JB
2612 } else {
2613 bool not_auth_yet = false;
f0706e82 2614
a58ce43f 2615 mutex_unlock(&ifmgd->mtx);
a58ce43f 2616
a1699b75 2617 mutex_lock(&local->mtx);
af6b6374 2618 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2619 if (wk->sdata != sdata)
af6b6374 2620 continue;
29165e4c
JB
2621
2622 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2623 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB
2624 wk->type != IEEE80211_WORK_ASSOC &&
2625 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB
2626 continue;
2627
af6b6374
JB
2628 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2629 continue;
29165e4c
JB
2630
2631 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2632 list_del_rcu(&wk->list);
af6b6374
JB
2633 free_work(wk);
2634 break;
2635 }
a1699b75 2636 mutex_unlock(&local->mtx);
af6b6374
JB
2637
2638 /*
2639 * If somebody requests authentication and we haven't
2640 * sent out an auth frame yet there's no need to send
2641 * out a deauth frame either. If the state was PROBE,
2642 * then this is the case. If it's AUTH we have sent a
2643 * frame, and if it's IDLE we have completed the auth
2644 * process already.
2645 */
2646 if (not_auth_yet) {
2647 __cfg80211_auth_canceled(sdata->dev, bssid);
2648 return 0;
2649 }
2650 }
77fdaa12 2651
0ff71613 2652 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2653 sdata->name, bssid, req->reason_code);
0ff71613 2654
d5cdfacb
JM
2655 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2656 req->reason_code, cookie,
2657 !req->local_state_change);
05e48e8e
JM
2658 if (assoc_bss)
2659 sta_info_destroy_addr(sdata, bssid);
f0706e82 2660
7da7cc1d 2661 mutex_lock(&sdata->local->mtx);
bc83b681 2662 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2663 mutex_unlock(&sdata->local->mtx);
bc83b681 2664
f0706e82
JB
2665 return 0;
2666}
84363e6e 2667
77fdaa12 2668int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB
2669 struct cfg80211_disassoc_request *req,
2670 void *cookie)
9c6bd790 2671{
77fdaa12 2672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2673 u8 bssid[ETH_ALEN];
9c6bd790 2674
77fdaa12 2675 mutex_lock(&ifmgd->mtx);
10f644a4 2676
8d8b261a
JB
2677 /*
2678 * cfg80211 should catch this ... but it's racy since
2679 * we can receive a disassoc frame, process it, hand it
2680 * to cfg80211 while that's in a locked section already
2681 * trying to tell us that the user wants to disconnect.
2682 */
0c1ad2ca 2683 if (ifmgd->associated != req->bss) {
77fdaa12
JB
2684 mutex_unlock(&ifmgd->mtx);
2685 return -ENOLINK;
2686 }
2687
0ff71613 2688 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2689 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2690
e69e95db 2691 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2692 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB
2693
2694 mutex_unlock(&ifmgd->mtx);
10f644a4 2695
77fdaa12 2696 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2697 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2698 cookie, !req->local_state_change);
e69e95db 2699 sta_info_destroy_addr(sdata, bssid);
bc83b681 2700
7da7cc1d 2701 mutex_lock(&sdata->local->mtx);
bc83b681 2702 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2703 mutex_unlock(&sdata->local->mtx);
bc83b681 2704
10f644a4
JB
2705 return 0;
2706}
026331c4 2707
a97c13c3
JO
2708void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2709 enum nl80211_cqm_rssi_threshold_event rssi_event,
2710 gfp_t gfp)
2711{
2712 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2713
b5878a2d
JB
2714 trace_api_cqm_rssi_notify(sdata, rssi_event);
2715
a97c13c3
JO
2716 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2717}
2718EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP
2719
2720unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2721{
2722 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2723 return sdata->dev->operstate;
2724}
2725EXPORT_SYMBOL(ieee80211_get_operstate);