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ath9k: Fix compilation warning.
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
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
93 /* caller must call cfg80211_send_rx_auth() */
94 RX_MGMT_CFG80211_AUTH,
95
96 /* caller must call cfg80211_send_rx_assoc() */
97 RX_MGMT_CFG80211_ASSOC,
98
99 /* caller must call cfg80211_send_deauth() */
100 RX_MGMT_CFG80211_DEAUTH,
101
102 /* caller must call cfg80211_send_disassoc() */
103 RX_MGMT_CFG80211_DISASSOC,
104
5d1ec85f
JB		 105 /* caller must tell cfg80211 about internal error */
106 RX_MGMT_CFG80211_ASSOC_ERROR,
77fdaa12
JB		 107};
108
5484e237 109/* utils */
77fdaa12
JB		 110static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
111{
46a5ebaf 112 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 113}
114
ca386f31
JB		 115/*
116 * We can have multiple work items (and connection probing)
117 * scheduling this timer, but we need to take care to only
118 * reschedule it when it should fire _earlier_ than it was
119 * asked for before, or if it's not pending right now. This
120 * function ensures that. Note that it then is required to
121 * run this function for all timeouts after the first one
122 * has happened -- the work that runs from this timer will
123 * do that.
124 */
125static void run_again(struct ieee80211_if_managed *ifmgd,
126 unsigned long timeout)
127{
128 ASSERT_MGD_MTX(ifmgd);
129
130 if (!timer_pending(&ifmgd->timer) ||
131 time_before(timeout, ifmgd->timer.expires))
132 mod_timer(&ifmgd->timer, timeout);
133}
134
d3a910a8 135void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 136{
137 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
138 return;
139
140 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 141 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 142}
143
be099e82
LR		 144void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
145{
0c699c3a
LR		 146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
147
be099e82
LR		 148 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
149 return;
150
151 mod_timer(&sdata->u.mgd.conn_mon_timer,
152 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 153
154 ifmgd->probe_send_count = 0;
be099e82
LR		 155}
156
5484e237 157static int ecw2cw(int ecw)
60f8b39c 158{
5484e237 159 return (1 << ecw) - 1;
60f8b39c
JB		 160}
161
d5522e03
JB		 162/*
163 * ieee80211_enable_ht should be called only after the operating band
164 * has been determined as ht configuration depends on the hw's
165 * HT abilities for a specific band.
166 */
167static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
168 struct ieee80211_ht_info *hti,
77fdaa12 169 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 170{
171 struct ieee80211_local *local = sdata->local;
172 struct ieee80211_supported_band *sband;
d5522e03
JB		 173 struct sta_info *sta;
174 u32 changed = 0;
172710bf 175 int hti_cfreq;
9ed6bcce 176 u16 ht_opmode;
0aaffa9b
JB		 177 bool enable_ht = true;
178 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 179 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
180
181 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
182
0aaffa9b
JB		 183 prev_chantype = sdata->vif.bss_conf.channel_type;
184
d5522e03
JB		 185 /* HT is not supported */
186 if (!sband->ht_cap.ht_supported)
187 enable_ht = false;
188
172710bf
BG		 189 if (enable_ht) {
190 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
191 sband->band);
192 /* check that channel matches the right operating channel */
193 if (local->hw.conf.channel->center_freq != hti_cfreq) {
194 /* Some APs mess this up, evidently.
195 * Netgear WNDR3700 sometimes reports 4 higher than
196 * the actual channel, for instance.
197 */
198 printk(KERN_DEBUG
199 "%s: Wrong control channel in association"
200 " response: configured center-freq: %d"
201 " hti-cfreq: %d hti->control_chan: %d"
202 " band: %d. Disabling HT.\n",
203 sdata->name,
204 local->hw.conf.channel->center_freq,
205 hti_cfreq, hti->control_chan,
206 sband->band);
207 enable_ht = false;
208 }
209 }
d5522e03
JB		 210
211 if (enable_ht) {
212 channel_type = NL80211_CHAN_HT20;
213
214 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
215 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
216 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
217 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
218 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40PLUS))
221 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 222 break;
223 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 224 if (!(local->hw.conf.channel->flags &
225 IEEE80211_CHAN_NO_HT40MINUS))
226 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 227 break;
228 }
229 }
230 }
231
fe6f212c
RC		 232 if (local->tmp_channel)
233 local->tmp_channel_type = channel_type;
d5522e03 234
0aaffa9b
JB		 235 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
236 /* can only fail due to HT40+/- mismatch */
237 channel_type = NL80211_CHAN_HT20;
238 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
239 }
d5522e03 240
0aaffa9b
JB		 241 /* channel_type change automatically detected */
242 ieee80211_hw_config(local, 0);
d5522e03 243
0aaffa9b 244 if (prev_chantype != channel_type) {
d5522e03 245 rcu_read_lock();
abe60632 246 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 247 if (sta)
248 rate_control_rate_update(local, sband, sta,
4fa00437 249 IEEE80211_RC_HT_CHANGED,
0aaffa9b 250 channel_type);
d5522e03 251 rcu_read_unlock();
0aaffa9b 252 }
d5522e03 253
9ed6bcce 254 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 255
256 /* if bss configuration changed store the new one */
0aaffa9b
JB		 257 if (sdata->ht_opmode_valid != enable_ht ||
258 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
259 prev_chantype != channel_type) {
d5522e03 260 changed |= BSS_CHANGED_HT;
9ed6bcce 261 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 262 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 263 }
264
265 return changed;
266}
267
9c6bd790
JB		 268/* frame sending functions */
269
ef422bc0 270static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 271 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 272 void *cookie, bool send_frame)
9ac19a90
JB		 273{
274 struct ieee80211_local *local = sdata->local;
46900298 275 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 276 struct sk_buff *skb;
277 struct ieee80211_mgmt *mgmt;
9aed3cc1 278
65fc73ac 279 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 280 if (!skb) {
ef422bc0 281 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 282 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 283 return;
284 }
285 skb_reserve(skb, local->hw.extra_tx_headroom);
286
287 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
288 memset(mgmt, 0, 24);
77fdaa12 289 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 291 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 292 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 293 skb_put(skb, 2);
ef422bc0 294 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 295 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
296
53b46b84 297 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 298 if (cookie)
299 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
300 else
301 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 302 else
ce470613
HS		 303 if (cookie)
304 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
305 else
306 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 307 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
308 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 309
310 if (send_frame)
311 ieee80211_tx_skb(sdata, skb);
312 else
313 kfree_skb(skb);
9ac19a90
JB		 314}
315
572e0012
KV		 316void ieee80211_send_pspoll(struct ieee80211_local *local,
317 struct ieee80211_sub_if_data *sdata)
318{
572e0012
KV		 319 struct ieee80211_pspoll *pspoll;
320 struct sk_buff *skb;
572e0012 321
d8cd189e
KV		 322 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
323 if (!skb)
572e0012 324 return;
572e0012 325
d8cd189e
KV		 326 pspoll = (struct ieee80211_pspoll *) skb->data;
327 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 328
62ae67be
JB		 329 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
330 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 331}
332
965bedad
JB		 333void ieee80211_send_nullfunc(struct ieee80211_local *local,
334 struct ieee80211_sub_if_data *sdata,
335 int powersave)
336{
337 struct sk_buff *skb;
d8cd189e 338 struct ieee80211_hdr_3addr *nullfunc;
965bedad 339
d8cd189e
KV		 340 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
341 if (!skb)
965bedad 342 return;
965bedad 343
d8cd189e 344 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 345 if (powersave)
d8cd189e 346 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 347
62ae67be
JB		 348 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
349 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 350}
351
d524215f
FF		 352static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
353 struct ieee80211_sub_if_data *sdata)
354{
355 struct sk_buff *skb;
356 struct ieee80211_hdr *nullfunc;
357 __le16 fc;
358
359 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
360 return;
361
362 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
363 if (!skb) {
364 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
365 "nullfunc frame\n", sdata->name);
366 return;
367 }
368 skb_reserve(skb, local->hw.extra_tx_headroom);
369
370 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
371 memset(nullfunc, 0, 30);
372 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
373 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
374 nullfunc->frame_control = fc;
375 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
376 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
377 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
378 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
379
380 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
381 ieee80211_tx_skb(sdata, skb);
382}
383
cc32abd4
JB		 384/* spectrum management related things */
385static void ieee80211_chswitch_work(struct work_struct *work)
386{
387 struct ieee80211_sub_if_data *sdata =
388 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
390
9607e6b6 391 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 392 return;
393
77fdaa12
JB		 394 mutex_lock(&ifmgd->mtx);
395 if (!ifmgd->associated)
396 goto out;
cc32abd4
JB		 397
398 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 399 if (!sdata->local->ops->channel_switch) {
400 /* call "hw_config" only if doing sw channel switch */
401 ieee80211_hw_config(sdata->local,
402 IEEE80211_CONF_CHANGE_CHANNEL);
403 }
77fdaa12 404
cc32abd4 405 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 406 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 407
cc32abd4
JB		 408 ieee80211_wake_queues_by_reason(&sdata->local->hw,
409 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 410 out:
411 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
412 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 413}
414
5ce6e438
JB		 415void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
416{
417 struct ieee80211_sub_if_data *sdata;
418 struct ieee80211_if_managed *ifmgd;
419
420 sdata = vif_to_sdata(vif);
421 ifmgd = &sdata->u.mgd;
422
423 trace_api_chswitch_done(sdata, success);
424 if (!success) {
425 /*
426 * If the channel switch was not successful, stay
427 * around on the old channel. We currently lack
428 * good handling of this situation, possibly we
429 * should just drop the association.
430 */
431 sdata->local->csa_channel = sdata->local->oper_channel;
432 }
433
434 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
435}
436EXPORT_SYMBOL(ieee80211_chswitch_done);
437
cc32abd4
JB		 438static void ieee80211_chswitch_timer(unsigned long data)
439{
440 struct ieee80211_sub_if_data *sdata =
441 (struct ieee80211_sub_if_data *) data;
442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
443
5bb644a0
JB		 444 if (sdata->local->quiescing) {
445 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
446 return;
447 }
448
42935eca 449 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 450}
451
452void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
453 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 454 struct ieee80211_bss *bss,
455 u64 timestamp)
cc32abd4 456{
0c1ad2ca
JB		 457 struct cfg80211_bss *cbss =
458 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 459 struct ieee80211_channel *new_ch;
460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 461 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
462 cbss->channel->band);
cc32abd4 463
77fdaa12
JB		 464 ASSERT_MGD_MTX(ifmgd);
465
466 if (!ifmgd->associated)
cc32abd4
JB		 467 return;
468
fbe9c429 469 if (sdata->local->scanning)
cc32abd4
JB		 470 return;
471
472 /* Disregard subsequent beacons if we are already running a timer
473 processing a CSA */
474
475 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
476 return;
477
478 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
479 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
480 return;
481
482 sdata->local->csa_channel = new_ch;
483
5ce6e438
JB		 484 if (sdata->local->ops->channel_switch) {
485 /* use driver's channel switch callback */
486 struct ieee80211_channel_switch ch_switch;
487 memset(&ch_switch, 0, sizeof(ch_switch));
488 ch_switch.timestamp = timestamp;
489 if (sw_elem->mode) {
490 ch_switch.block_tx = true;
491 ieee80211_stop_queues_by_reason(&sdata->local->hw,
492 IEEE80211_QUEUE_STOP_REASON_CSA);
493 }
494 ch_switch.channel = new_ch;
495 ch_switch.count = sw_elem->count;
496 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
497 drv_channel_switch(sdata->local, &ch_switch);
498 return;
499 }
500
501 /* channel switch handled in software */
cc32abd4 502 if (sw_elem->count <= 1) {
42935eca 503 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 504 } else {
9feaddc7
WYG		 505 if (sw_elem->mode)
506 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 507 IEEE80211_QUEUE_STOP_REASON_CSA);
508 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
509 mod_timer(&ifmgd->chswitch_timer,
510 jiffies +
511 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 512 cbss->beacon_interval));
cc32abd4
JB		 513 }
514}
515
516static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
517 u16 capab_info, u8 *pwr_constr_elem,
518 u8 pwr_constr_elem_len)
519{
520 struct ieee80211_conf *conf = &sdata->local->hw.conf;
521
522 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
523 return;
524
525 /* Power constraint IE length should be 1 octet */
526 if (pwr_constr_elem_len != 1)
527 return;
528
529 if ((*pwr_constr_elem <= conf->channel->max_power) &&
530 (*pwr_constr_elem != sdata->local->power_constr_level)) {
531 sdata->local->power_constr_level = *pwr_constr_elem;
532 ieee80211_hw_config(sdata->local, 0);
533 }
534}
535
f90754c1
JO		 536void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
537{
538 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
539 struct ieee80211_local *local = sdata->local;
540 struct ieee80211_conf *conf = &local->hw.conf;
541
542 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
543 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
544 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
545
546 local->disable_dynamic_ps = false;
547 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
548}
549EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
550
551void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
552{
553 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
554 struct ieee80211_local *local = sdata->local;
555 struct ieee80211_conf *conf = &local->hw.conf;
556
557 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
558 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
559 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
560
561 local->disable_dynamic_ps = true;
562 conf->dynamic_ps_timeout = 0;
563 del_timer_sync(&local->dynamic_ps_timer);
564 ieee80211_queue_work(&local->hw,
565 &local->dynamic_ps_enable_work);
566}
567EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
568
965bedad
JB		 569/* powersave */
570static void ieee80211_enable_ps(struct ieee80211_local *local,
571 struct ieee80211_sub_if_data *sdata)
572{
573 struct ieee80211_conf *conf = &local->hw.conf;
574
d5edaedc
JB		 575 /*
576 * If we are scanning right now then the parameters will
577 * take effect when scan finishes.
578 */
fbe9c429 579 if (local->scanning)
d5edaedc
JB		 580 return;
581
965bedad
JB		 582 if (conf->dynamic_ps_timeout > 0 &&
583 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
584 mod_timer(&local->dynamic_ps_timer, jiffies +
585 msecs_to_jiffies(conf->dynamic_ps_timeout));
586 } else {
587 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
588 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 589
2a13052f
JO		 590 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
591 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
592 return;
593
594 conf->flags |= IEEE80211_CONF_PS;
595 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 596 }
597}
598
599static void ieee80211_change_ps(struct ieee80211_local *local)
600{
601 struct ieee80211_conf *conf = &local->hw.conf;
602
603 if (local->ps_sdata) {
965bedad
JB		 604 ieee80211_enable_ps(local, local->ps_sdata);
605 } else if (conf->flags & IEEE80211_CONF_PS) {
606 conf->flags &= ~IEEE80211_CONF_PS;
607 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
608 del_timer_sync(&local->dynamic_ps_timer);
609 cancel_work_sync(&local->dynamic_ps_enable_work);
610 }
611}
612
613/* need to hold RTNL or interface lock */
10f644a4 614void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 615{
616 struct ieee80211_sub_if_data *sdata, *found = NULL;
617 int count = 0;
195e294d 618 int timeout;
965bedad
JB		 619
620 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
621 local->ps_sdata = NULL;
622 return;
623 }
624
af6b6374
JB		 625 if (!list_empty(&local->work_list)) {
626 local->ps_sdata = NULL;
627 goto change;
628 }
629
965bedad 630 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 631 if (!ieee80211_sdata_running(sdata))
965bedad 632 continue;
8c7914de
RM		 633 if (sdata->vif.type == NL80211_IFTYPE_AP) {
634 /* If an AP vif is found, then disable PS
635 * by setting the count to zero thereby setting
636 * ps_sdata to NULL.
637 */
638 count = 0;
639 break;
640 }
965bedad
JB		 641 if (sdata->vif.type != NL80211_IFTYPE_STATION)
642 continue;
643 found = sdata;
644 count++;
645 }
646
43f78531 647 if (count == 1 && found->u.mgd.powersave &&
af6b6374 648 found->u.mgd.associated &&
56007a02 649 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 650 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
651 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 652 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 653 s32 beaconint_us;
654
655 if (latency < 0)
ed77134b 656 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 657
658 beaconint_us = ieee80211_tu_to_usec(
659 found->vif.bss_conf.beacon_int);
660
ff616381 661 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 662 if (timeout < 0) {
663 /*
ff616381
JO		 664 * Go to full PSM if the user configures a very low
665 * latency requirement.
0ab82b04
EP		 666 * The 2000 second value is there for compatibility
667 * until the PM_QOS_NETWORK_LATENCY is configured
668 * with real values.
195e294d 669 */
0ab82b04
EP		 670 if (latency > (1900 * USEC_PER_MSEC) &&
671 latency != (2000 * USEC_PER_SEC))
195e294d 672 timeout = 0;
ff616381
JO		 673 else
674 timeout = 100;
195e294d 675 }
f90754c1
JO		 676 local->dynamic_ps_user_timeout = timeout;
677 if (!local->disable_dynamic_ps)
678 conf->dynamic_ps_timeout =
679 local->dynamic_ps_user_timeout;
195e294d 680
04fe2037 681 if (beaconint_us > latency) {
10f644a4 682 local->ps_sdata = NULL;
04fe2037 683 } else {
56007a02 684 struct ieee80211_bss *bss;
04fe2037 685 int maxslp = 1;
56007a02 686 u8 dtimper;
04fe2037 687
56007a02
JB		 688 bss = (void *)found->u.mgd.associated->priv;
689 dtimper = bss->dtim_period;
690
691 /* If the TIM IE is invalid, pretend the value is 1 */
692 if (!dtimper)
693 dtimper = 1;
694 else if (dtimper > 1)
04fe2037
JB		 695 maxslp = min_t(int, dtimper,
696 latency / beaconint_us);
697
9ccebe61 698 local->hw.conf.max_sleep_period = maxslp;
56007a02 699 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 700 local->ps_sdata = found;
04fe2037 701 }
10f644a4 702 } else {
965bedad 703 local->ps_sdata = NULL;
10f644a4 704 }
965bedad 705
af6b6374 706 change:
965bedad
JB		 707 ieee80211_change_ps(local);
708}
709
710void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
711{
712 struct ieee80211_local *local =
713 container_of(work, struct ieee80211_local,
714 dynamic_ps_disable_work);
715
716 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
717 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
718 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
719 }
720
721 ieee80211_wake_queues_by_reason(&local->hw,
722 IEEE80211_QUEUE_STOP_REASON_PS);
723}
724
725void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
726{
727 struct ieee80211_local *local =
728 container_of(work, struct ieee80211_local,
729 dynamic_ps_enable_work);
730 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 732
733 /* can only happen when PS was just disabled anyway */
734 if (!sdata)
735 return;
736
737 if (local->hw.conf.flags & IEEE80211_CONF_PS)
738 return;
739
375177bf 740 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 741 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
742 netif_tx_stop_all_queues(sdata->dev);
743 /*
744 * Flush all the frames queued in the driver before
745 * going to power save
746 */
747 drv_flush(local, false);
965bedad
JB		 748 ieee80211_send_nullfunc(local, sdata, 1);
749
f3e85b9e
VN		 750 /* Flush once again to get the tx status of nullfunc frame */
751 drv_flush(local, false);
752 }
753
2a13052f
JO		 754 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
755 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 756 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
757 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
758 local->hw.conf.flags |= IEEE80211_CONF_PS;
759 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
760 }
f3e85b9e
VN		 761
762 netif_tx_start_all_queues(sdata->dev);
965bedad
JB		 763}
764
765void ieee80211_dynamic_ps_timer(unsigned long data)
766{
767 struct ieee80211_local *local = (void *) data;
768
78f1a8b7 769 if (local->quiescing || local->suspended)
5bb644a0
JB		 770 return;
771
42935eca 772 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 773}
774
60f8b39c 775/* MLME */
f698d856 776static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 777 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 778 u8 *wmm_param, size_t wmm_param_len)
779{
f0706e82 780 struct ieee80211_tx_queue_params params;
4ced3f74 781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 782 size_t left;
783 int count;
ab13315a 784 u8 *pos, uapsd_queues = 0;
f0706e82 785
e1b3ec1a
SG		 786 if (!local->ops->conf_tx)
787 return;
788
af6b6374 789 if (local->hw.queues < 4)
3434fbd3
JB		 790 return;
791
792 if (!wmm_param)
793 return;
794
f0706e82
JB		 795 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
796 return;
ab13315a
KV		 797
798 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 799 uapsd_queues = local->uapsd_queues;
ab13315a 800
f0706e82 801 count = wmm_param[6] & 0x0f;
46900298 802 if (count == ifmgd->wmm_last_param_set)
f0706e82 803 return;
46900298 804 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 805
806 pos = wmm_param + 8;
807 left = wmm_param_len - 8;
808
809 memset(&params, 0, sizeof(params));
810
f0706e82
JB		 811 local->wmm_acm = 0;
812 for (; left >= 4; left -= 4, pos += 4) {
813 int aci = (pos[0] >> 5) & 0x03;
814 int acm = (pos[0] >> 4) & 0x01;
ab13315a 815 bool uapsd = false;
f0706e82
JB		 816 int queue;
817
818 switch (aci) {
0eeb59fe 819 case 1: /* AC_BK */
e100bb64 820 queue = 3;
988c0f72 821 if (acm)
0eeb59fe 822 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 823 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
824 uapsd = true;
f0706e82 825 break;
0eeb59fe 826 case 2: /* AC_VI */
e100bb64 827 queue = 1;
988c0f72 828 if (acm)
0eeb59fe 829 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 830 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
831 uapsd = true;
f0706e82 832 break;
0eeb59fe 833 case 3: /* AC_VO */
e100bb64 834 queue = 0;
988c0f72 835 if (acm)
0eeb59fe 836 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 837 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
838 uapsd = true;
f0706e82 839 break;
0eeb59fe 840 case 0: /* AC_BE */
f0706e82 841 default:
e100bb64 842 queue = 2;
988c0f72 843 if (acm)
0eeb59fe 844 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 845 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
846 uapsd = true;
f0706e82
JB		 847 break;
848 }
849
850 params.aifs = pos[0] & 0x0f;
851 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
852 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 853 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 854 params.uapsd = uapsd;
855
f4ea83dd 856#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 857 wiphy_debug(local->hw.wiphy,
858 "WMM queue=%d aci=%d acm=%d aifs=%d "
859 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
860 queue, aci, acm,
861 params.aifs, params.cw_min, params.cw_max,
862 params.txop, params.uapsd);
3330d7be 863#endif
e1b3ec1a 864 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 865 wiphy_debug(local->hw.wiphy,
866 "failed to set TX queue parameters for queue %d\n",
867 queue);
f0706e82 868 }
e1b3ec1a
SG		 869
870 /* enable WMM or activate new settings */
4ced3f74
JB		 871 sdata->vif.bss_conf.qos = true;
872 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 873}
874
7a5158ef
JB		 875static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
876 u16 capab, bool erp_valid, u8 erp)
5628221c 877{
bda3933a 878 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 879 u32 changed = 0;
7a5158ef
JB		 880 bool use_protection;
881 bool use_short_preamble;
882 bool use_short_slot;
883
884 if (erp_valid) {
885 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
886 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
887 } else {
888 use_protection = false;
889 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
890 }
891
892 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 893 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
894 use_short_slot = true;
5628221c 895
471b3efd 896 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 897 bss_conf->use_cts_prot = use_protection;
898 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 899 }
7e9ed188 900
d43c7b37 901 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 902 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 903 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 904 }
d9430a32 905
7a5158ef 906 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 907 bss_conf->use_short_slot = use_short_slot;
908 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 909 }
910
911 return changed;
912}
913
f698d856 914static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 915 struct cfg80211_bss *cbss,
ae5eb026 916 u32 bss_info_changed)
f0706e82 917{
0c1ad2ca 918 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 919 struct ieee80211_local *local = sdata->local;
68542962 920 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 921
ae5eb026 922 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 923 /* set timing information */
68542962
JO		 924 bss_conf->beacon_int = cbss->beacon_interval;
925 bss_conf->timestamp = cbss->tsf;
5628221c 926
77fdaa12
JB		 927 bss_info_changed |= BSS_CHANGED_BEACON_INT;
928 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 929 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 930
7ccc8bd7
FF		 931 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
932 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
933
0c1ad2ca
JB		 934 sdata->u.mgd.associated = cbss;
935 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 936
17e4ec14
JM		 937 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
938
b291ba11
JB		 939 /* just to be sure */
940 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
941 IEEE80211_STA_BEACON_POLL);
942
9ac19a90 943 ieee80211_led_assoc(local, 1);
9306102e 944
e5b900d2
JB		 945 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
946 bss_conf->dtim_period = bss->dtim_period;
947 else
948 bss_conf->dtim_period = 0;
949
68542962 950 bss_conf->assoc = 1;
96dd22ac
JB		 951 /*
952 * For now just always ask the driver to update the basic rateset
953 * when we have associated, we aren't checking whether it actually
954 * changed or not.
955 */
ae5eb026 956 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 957
958 /* And the BSSID changed - we're associated now */
959 bss_info_changed |= BSS_CHANGED_BSSID;
960
a97c13c3
JO		 961 /* Tell the driver to monitor connection quality (if supported) */
962 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 963 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 964 bss_info_changed |= BSS_CHANGED_CQM;
965
68542962
JO		 966 /* Enable ARP filtering */
967 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
968 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
969 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
970 }
971
ae5eb026 972 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 973
056508dc
JB		 974 mutex_lock(&local->iflist_mtx);
975 ieee80211_recalc_ps(local, -1);
025e6be2 976 ieee80211_recalc_smps(local);
056508dc 977 mutex_unlock(&local->iflist_mtx);
e0cb686f 978
8a5b33f5 979 netif_tx_start_all_queues(sdata->dev);
9ac19a90 980 netif_carrier_on(sdata->dev);
f0706e82
JB		 981}
982
e69e95db 983static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 984 bool remove_sta, bool tx)
aa458d17 985{
46900298 986 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 987 struct ieee80211_local *local = sdata->local;
988 struct sta_info *sta;
e0cb686f 989 u32 changed = 0, config_changed = 0;
b291ba11 990 u8 bssid[ETH_ALEN];
aa458d17 991
77fdaa12
JB		 992 ASSERT_MGD_MTX(ifmgd);
993
b291ba11
JB		 994 if (WARN_ON(!ifmgd->associated))
995 return;
996
0c1ad2ca 997 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 998
77fdaa12
JB		 999 ifmgd->associated = NULL;
1000 memset(ifmgd->bssid, 0, ETH_ALEN);
1001
1002 /*
1003 * we need to commit the associated = NULL change because the
1004 * scan code uses that to determine whether this iface should
1005 * go to/wake up from powersave or not -- and could otherwise
1006 * wake the queues erroneously.
1007 */
1008 smp_mb();
1009
1010 /*
1011 * Thus, we can only afterwards stop the queues -- to account
1012 * for the case where another CPU is finishing a scan at this
1013 * time -- we don't want the scan code to enable queues.
1014 */
aa458d17 1015
8a5b33f5 1016 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1017 netif_carrier_off(sdata->dev);
1018
2a419056 1019 mutex_lock(&local->sta_mtx);
abe60632 1020 sta = sta_info_get(sdata, bssid);
4cad6c7c 1021 if (sta) {
2a419056 1022 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1023 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1024 }
2a419056 1025 mutex_unlock(&local->sta_mtx);
aa458d17 1026
f5e5bf25
TW		 1027 changed |= ieee80211_reset_erp_info(sdata);
1028
f5e5bf25 1029 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1030 changed |= BSS_CHANGED_ASSOC;
1031 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1032
aa837e1d
JB		 1033 ieee80211_set_wmm_default(sdata);
1034
4797938c 1035 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1036 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1037
413ad50a
JB		 1038 /* on the next assoc, re-program HT parameters */
1039 sdata->ht_opmode_valid = false;
1040
a8302de9
VT		 1041 local->power_constr_level = 0;
1042
520eb820
KV		 1043 del_timer_sync(&local->dynamic_ps_timer);
1044 cancel_work_sync(&local->dynamic_ps_enable_work);
1045
e0cb686f
KV		 1046 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1047 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1048 config_changed |= IEEE80211_CONF_CHANGE_PS;
1049 }
ae5eb026 1050
e0cb686f 1051 ieee80211_hw_config(local, config_changed);
9cef8737 1052
68542962
JO		 1053 /* Disable ARP filtering */
1054 if (sdata->vif.bss_conf.arp_filter_enabled) {
1055 sdata->vif.bss_conf.arp_filter_enabled = false;
1056 changed |= BSS_CHANGED_ARP_FILTER;
1057 }
1058
0aaffa9b
JB		 1059 /* The BSSID (not really interesting) and HT changed */
1060 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1061 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1062
e69e95db
JM		 1063 if (remove_sta)
1064 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1065
1066 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1067 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1068 del_timer_sync(&sdata->u.mgd.timer);
1069 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1070}
f0706e82 1071
3cf335d5
KV		 1072void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1073 struct ieee80211_hdr *hdr)
1074{
1075 /*
1076 * We can postpone the mgd.timer whenever receiving unicast frames
1077 * from AP because we know that the connection is working both ways
1078 * at that time. But multicast frames (and hence also beacons) must
1079 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1080 * data idle periods for sending the periodic probe request to the
1081 * AP we're connected to.
3cf335d5 1082 */
b291ba11
JB		 1083 if (is_multicast_ether_addr(hdr->addr1))
1084 return;
1085
05e7c991
SG		 1086 /*
1087 * In case we receive frames after disassociation.
1088 */
1089 if (!sdata->u.mgd.associated)
1090 return;
1091
be099e82 1092 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1093}
f0706e82 1094
4e5ff376
FF		 1095static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1096{
1097 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1098
1099 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1100 IEEE80211_STA_CONNECTION_POLL)))
1101 return;
1102
1103 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1104 IEEE80211_STA_BEACON_POLL);
1105 mutex_lock(&sdata->local->iflist_mtx);
1106 ieee80211_recalc_ps(sdata->local, -1);
1107 mutex_unlock(&sdata->local->iflist_mtx);
1108
1109 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1110 return;
1111
1112 /*
1113 * We've received a probe response, but are not sure whether
1114 * we have or will be receiving any beacons or data, so let's
1115 * schedule the timers again, just in case.
1116 */
1117 ieee80211_sta_reset_beacon_monitor(sdata);
1118
1119 mod_timer(&ifmgd->conn_mon_timer,
1120 round_jiffies_up(jiffies +
1121 IEEE80211_CONNECTION_IDLE_TIME));
1122}
1123
1124void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1125 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1126{
75706d0e 1127 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1128 return;
1129
04ac3c0e
FF		 1130 if (ack)
1131 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1132
1133 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1134 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1135 if (ack)
1136 sdata->u.mgd.probe_send_count = 0;
1137 else
1138 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1139 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1140 }
1141}
1142
a43abf29
ML		 1143static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1144{
1145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1146 const u8 *ssid;
f01a067d 1147 u8 *dst = ifmgd->associated->bssid;
180205bd 1148 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1149
1150 /*
1151 * Try sending broadcast probe requests for the last three
1152 * probe requests after the first ones failed since some
1153 * buggy APs only support broadcast probe requests.
1154 */
1155 if (ifmgd->probe_send_count >= unicast_limit)
1156 dst = NULL;
a43abf29 1157
4e5ff376
FF		 1158 /*
1159 * When the hardware reports an accurate Tx ACK status, it's
1160 * better to send a nullfunc frame instead of a probe request,
1161 * as it will kick us off the AP quickly if we aren't associated
1162 * anymore. The timeout will be reset if the frame is ACKed by
1163 * the AP.
1164 */
04ac3c0e
FF		 1165 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1166 ifmgd->nullfunc_failed = false;
4e5ff376 1167 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1168 } else {
4e5ff376
FF		 1169 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1170 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
1171 }
a43abf29
ML		 1172
1173 ifmgd->probe_send_count++;
180205bd 1174 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1175 run_again(ifmgd, ifmgd->probe_timeout);
1176}
1177
b291ba11
JB		 1178static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1179 bool beacon)
04de8381 1180{
04de8381 1181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1182 bool already = false;
34bfc411 1183
9607e6b6 1184 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1185 return;
1186
91a3bd76
LR		 1187 if (sdata->local->scanning)
1188 return;
1189
b8bc4b0a
JB		 1190 if (sdata->local->tmp_channel)
1191 return;
1192
77fdaa12
JB		 1193 mutex_lock(&ifmgd->mtx);
1194
1195 if (!ifmgd->associated)
1196 goto out;
1197
a860402d 1198#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1199 if (beacon && net_ratelimit())
1200 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1201 "- sending probe request\n", sdata->name);
a860402d 1202#endif
04de8381 1203
b291ba11
JB		 1204 /*
1205 * The driver/our work has already reported this event or the
1206 * connection monitoring has kicked in and we have already sent
1207 * a probe request. Or maybe the AP died and the driver keeps
1208 * reporting until we disassociate...
1209 *
1210 * In either case we have to ignore the current call to this
1211 * function (except for setting the correct probe reason bit)
1212 * because otherwise we would reset the timer every time and
1213 * never check whether we received a probe response!
1214 */
1215 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1216 IEEE80211_STA_CONNECTION_POLL))
1217 already = true;
1218
1219 if (beacon)
1220 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1221 else
1222 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1223
1224 if (already)
1225 goto out;
1226
4e751843
JB		 1227 mutex_lock(&sdata->local->iflist_mtx);
1228 ieee80211_recalc_ps(sdata->local, -1);
1229 mutex_unlock(&sdata->local->iflist_mtx);
1230
a43abf29
ML		 1231 ifmgd->probe_send_count = 0;
1232 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1233 out:
1234 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1235}
1236
a619a4c0
JO		 1237struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1238 struct ieee80211_vif *vif)
1239{
1240 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1242 struct sk_buff *skb;
1243 const u8 *ssid;
1244
1245 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1246 return NULL;
1247
1248 ASSERT_MGD_MTX(ifmgd);
1249
1250 if (!ifmgd->associated)
1251 return NULL;
1252
1253 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1254 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1255 ssid + 2, ssid[1], NULL, 0);
1256
1257 return skb;
1258}
1259EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1260
1e4dcd01
JO		 1261static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1262{
1263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1264 struct ieee80211_local *local = sdata->local;
1265 u8 bssid[ETH_ALEN];
1266
1267 mutex_lock(&ifmgd->mtx);
1268 if (!ifmgd->associated) {
1269 mutex_unlock(&ifmgd->mtx);
1270 return;
1271 }
1272
1273 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1274
180205bd
BG		 1275 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1276 sdata->name, bssid);
1e4dcd01 1277
53f73c09 1278 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1279 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1280
1281 mutex_lock(&local->mtx);
1282 ieee80211_recalc_idle(local);
1283 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1284 /*
1285 * must be outside lock due to cfg80211,
1286 * but that's not a problem.
1287 */
1288 ieee80211_send_deauth_disassoc(sdata, bssid,
1289 IEEE80211_STYPE_DEAUTH,
1290 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1291 NULL, true);
1e4dcd01
JO		 1292}
1293
1294void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1295{
1296 struct ieee80211_sub_if_data *sdata =
1297 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1298 u.mgd.beacon_connection_loss_work);
b291ba11 1299
1e4dcd01
JO		 1300 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1301 __ieee80211_connection_loss(sdata);
1302 else
1303 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1304}
1305
04de8381
KV		 1306void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1307{
1308 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1309 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1310
b5878a2d
JB		 1311 trace_api_beacon_loss(sdata);
1312
1e4dcd01
JO		 1313 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1314 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1315}
1316EXPORT_SYMBOL(ieee80211_beacon_loss);
1317
1e4dcd01
JO		 1318void ieee80211_connection_loss(struct ieee80211_vif *vif)
1319{
1320 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1321 struct ieee80211_hw *hw = &sdata->local->hw;
1322
b5878a2d
JB		 1323 trace_api_connection_loss(sdata);
1324
1e4dcd01
JO		 1325 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1326 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1327}
1328EXPORT_SYMBOL(ieee80211_connection_loss);
1329
1330
77fdaa12
JB		 1331static enum rx_mgmt_action __must_check
1332ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1333 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1334{
46900298 1335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1336 const u8 *bssid = NULL;
f0706e82
JB		 1337 u16 reason_code;
1338
f4ea83dd 1339 if (len < 24 + 2)
77fdaa12 1340 return RX_MGMT_NONE;
f0706e82 1341
77fdaa12
JB		 1342 ASSERT_MGD_MTX(ifmgd);
1343
0c1ad2ca 1344 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1345
1346 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1347
77fdaa12 1348 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1349 sdata->name, bssid, reason_code);
77fdaa12 1350
53f73c09 1351 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1352 mutex_lock(&sdata->local->mtx);
63f170e0 1353 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1354 mutex_unlock(&sdata->local->mtx);
f0706e82 1355
77fdaa12 1356 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1357}
1358
1359
77fdaa12
JB		 1360static enum rx_mgmt_action __must_check
1361ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1362 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1363{
46900298 1364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1365 u16 reason_code;
1366
f4ea83dd 1367 if (len < 24 + 2)
77fdaa12 1368 return RX_MGMT_NONE;
f0706e82 1369
77fdaa12
JB		 1370 ASSERT_MGD_MTX(ifmgd);
1371
1372 if (WARN_ON(!ifmgd->associated))
1373 return RX_MGMT_NONE;
1374
0c1ad2ca 1375 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1376 return RX_MGMT_NONE;
f0706e82
JB		 1377
1378 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1379
0ff71613 1380 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1381 sdata->name, mgmt->sa, reason_code);
f0706e82 1382
53f73c09 1383 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1384 mutex_lock(&sdata->local->mtx);
bc83b681 1385 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1386 mutex_unlock(&sdata->local->mtx);
77fdaa12 1387 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1388}
1389
1390
af6b6374
JB		 1391static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1392 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1393{
af6b6374 1394 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1396 struct ieee80211_local *local = sdata->local;
8318d78a 1397 struct ieee80211_supported_band *sband;
f0706e82 1398 struct sta_info *sta;
0c1ad2ca 1399 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1400 u8 *pos;
881d948c 1401 u32 rates, basic_rates;
af6b6374 1402 u16 capab_info, aid;
f0706e82 1403 struct ieee802_11_elems elems;
bda3933a 1404 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1405 u32 changed = 0;
5d1ec85f
JB		 1406 int i, j, err;
1407 bool have_higher_than_11mbit = false;
ae5eb026 1408 u16 ap_ht_cap_flags;
f0706e82 1409
af6b6374 1410 /* AssocResp and ReassocResp have identical structure */
f0706e82 1411
f0706e82 1412 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1413 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1414
1dd84aa2
JB		 1415 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1416 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1417 "set\n", sdata->name, aid);
1dd84aa2
JB		 1418 aid &= ~(BIT(15) | BIT(14));
1419
af6b6374
JB		 1420 pos = mgmt->u.assoc_resp.variable;
1421 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1422
f0706e82
JB		 1423 if (!elems.supp_rates) {
1424 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1425 sdata->name);
af6b6374 1426 return false;
f0706e82
JB		 1427 }
1428
46900298 1429 ifmgd->aid = aid;
f0706e82 1430
0c1ad2ca 1431 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1432 if (!sta) {
5d1ec85f
JB		 1433 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1434 " the AP\n", sdata->name);
af6b6374 1435 return false;
77fdaa12 1436 }
05e5e883 1437
5d1ec85f
JB		 1438 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1439 WLAN_STA_ASSOC_AP);
1440 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1441 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1442
60f8b39c
JB		 1443 rates = 0;
1444 basic_rates = 0;
e7480bbb 1445 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1446
60f8b39c
JB		 1447 for (i = 0; i < elems.supp_rates_len; i++) {
1448 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1449 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1450
60f8b39c
JB		 1451 if (rate > 110)
1452 have_higher_than_11mbit = true;
1453
1454 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1455 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1456 rates |= BIT(j);
d61272cb
TW		 1457 if (is_basic)
1458 basic_rates |= BIT(j);
1459 break;
1460 }
f709fc69 1461 }
f709fc69
LCC		 1462 }
1463
60f8b39c
JB		 1464 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1465 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1466 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1467
60f8b39c
JB		 1468 if (rate > 110)
1469 have_higher_than_11mbit = true;
f0706e82 1470
60f8b39c 1471 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1472 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1473 rates |= BIT(j);
d61272cb
TW		 1474 if (is_basic)
1475 basic_rates |= BIT(j);
1476 break;
1477 }
60f8b39c 1478 }
1ebebea8 1479 }
f0706e82 1480
e7480bbb 1481 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1482 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1483
1484 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1485 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1486 have_higher_than_11mbit)
1487 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1488 else
1489 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1490
ab1faead 1491 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1492 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1493 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1494
1495 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1496
4b7679a5 1497 rate_control_rate_init(sta);
f0706e82 1498
46900298 1499 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1500 set_sta_flags(sta, WLAN_STA_MFP);
1501
ddf4ac53 1502 if (elems.wmm_param)
60f8b39c 1503 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1504
5d1ec85f
JB		 1505 err = sta_info_insert(sta);
1506 sta = NULL;
1507 if (err) {
1508 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1509 " the AP (error %d)\n", sdata->name, err);
90be561b 1510 return false;
ddf4ac53
JB		 1511 }
1512
f2176d72
JO		 1513 /*
1514 * Always handle WMM once after association regardless
1515 * of the first value the AP uses. Setting -1 here has
1516 * that effect because the AP values is an unsigned
1517 * 4-bit value.
1518 */
1519 ifmgd->wmm_last_param_set = -1;
1520
ddf4ac53 1521 if (elems.wmm_param)
4ced3f74 1522 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1523 elems.wmm_param_len);
aa837e1d
JB		 1524 else
1525 ieee80211_set_wmm_default(sdata);
f0706e82 1526
e4da8c37
JB		 1527 local->oper_channel = wk->chan;
1528
ae5eb026 1529 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1530 (sdata->local->hw.queues >= 4) &&
ab1faead 1531 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1532 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1533 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1534
60f8b39c
JB		 1535 /* set AID and assoc capability,
1536 * ieee80211_set_associated() will tell the driver */
1537 bss_conf->aid = aid;
1538 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1539 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1540
d524215f
FF		 1541 /*
1542 * If we're using 4-addr mode, let the AP know that we're
1543 * doing so, so that it can create the STA VLAN on its side
1544 */
1545 if (ifmgd->use_4addr)
1546 ieee80211_send_4addr_nullfunc(local, sdata);
1547
15b7b062 1548 /*
b291ba11
JB		 1549 * Start timer to probe the connection to the AP now.
1550 * Also start the timer that will detect beacon loss.
15b7b062 1551 */
b291ba11 1552 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1553 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1554
af6b6374 1555 return true;
f0706e82
JB		 1556}
1557
1558
98c8fccf
JB		 1559static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1560 struct ieee80211_mgmt *mgmt,
1561 size_t len,
1562 struct ieee80211_rx_status *rx_status,
1563 struct ieee802_11_elems *elems,
1564 bool beacon)
1565{
1566 struct ieee80211_local *local = sdata->local;
1567 int freq;
c2b13452 1568 struct ieee80211_bss *bss;
98c8fccf 1569 struct ieee80211_channel *channel;
56007a02
JB		 1570 bool need_ps = false;
1571
1572 if (sdata->u.mgd.associated) {
1573 bss = (void *)sdata->u.mgd.associated->priv;
1574 /* not previously set so we may need to recalc */
1575 need_ps = !bss->dtim_period;
1576 }
98c8fccf
JB		 1577
1578 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1579 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1580 rx_status->band);
98c8fccf
JB		 1581 else
1582 freq = rx_status->freq;
1583
1584 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1585
1586 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1587 return;
1588
98c8fccf 1589 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1590 channel, beacon);
77fdaa12
JB		 1591 if (bss)
1592 ieee80211_rx_bss_put(local, bss);
1593
1594 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1595 return;
1596
56007a02
JB		 1597 if (need_ps) {
1598 mutex_lock(&local->iflist_mtx);
1599 ieee80211_recalc_ps(local, -1);
1600 mutex_unlock(&local->iflist_mtx);
1601 }
1602
c481ec97 1603 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1604 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1605 ETH_ALEN) == 0)) {
c481ec97
S		 1606 struct ieee80211_channel_sw_ie *sw_elem =
1607 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1608 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1609 bss, rx_status->mactime);
c481ec97 1610 }
f0706e82
JB		 1611}
1612
1613
f698d856 1614static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1615 struct sk_buff *skb)
f0706e82 1616{
af6b6374 1617 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1618 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1619 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1620 size_t baselen, len = skb->len;
ae6a44e3
EK		 1621 struct ieee802_11_elems elems;
1622
15b7b062
KV		 1623 ifmgd = &sdata->u.mgd;
1624
77fdaa12
JB		 1625 ASSERT_MGD_MTX(ifmgd);
1626
47846c9b 1627 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1628 return; /* ignore ProbeResp to foreign address */
1629
ae6a44e3
EK		 1630 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1631 if (baselen > len)
1632 return;
1633
1634 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1635 &elems);
1636
98c8fccf 1637 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1638
77fdaa12 1639 if (ifmgd->associated &&
4e5ff376
FF		 1640 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1641 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1642}
1643
d91f36db
JB		 1644/*
1645 * This is the canonical list of information elements we care about,
1646 * the filter code also gives us all changes to the Microsoft OUI
1647 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1648 *
1649 * We implement beacon filtering in software since that means we can
1650 * avoid processing the frame here and in cfg80211, and userspace
1651 * will not be able to tell whether the hardware supports it or not.
1652 *
1653 * XXX: This list needs to be dynamic -- userspace needs to be able to
1654 * add items it requires. It also needs to be able to tell us to
1655 * look out for other vendor IEs.
1656 */
1657static const u64 care_about_ies =
1d4df3a5
JB		 1658 (1ULL << WLAN_EID_COUNTRY) |
1659 (1ULL << WLAN_EID_ERP_INFO) |
1660 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1661 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1662 (1ULL << WLAN_EID_HT_CAPABILITY) |
1663 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1664
f698d856 1665static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1666 struct ieee80211_mgmt *mgmt,
1667 size_t len,
1668 struct ieee80211_rx_status *rx_status)
1669{
d91f36db 1670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1671 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1672 size_t baselen;
1673 struct ieee802_11_elems elems;
f698d856 1674 struct ieee80211_local *local = sdata->local;
471b3efd 1675 u32 changed = 0;
d91f36db 1676 bool erp_valid, directed_tim = false;
7a5158ef 1677 u8 erp_value = 0;
d91f36db 1678 u32 ncrc;
77fdaa12
JB		 1679 u8 *bssid;
1680
1681 ASSERT_MGD_MTX(ifmgd);
f0706e82 1682
ae6a44e3
EK		 1683 /* Process beacon from the current BSS */
1684 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1685 if (baselen > len)
1686 return;
1687
d91f36db 1688 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1689 return;
f0706e82 1690
b291ba11
JB		 1691 /*
1692 * We might have received a number of frames, among them a
1693 * disassoc frame and a beacon...
1694 */
1695 if (!ifmgd->associated)
77fdaa12
JB		 1696 return;
1697
0c1ad2ca 1698 bssid = ifmgd->associated->bssid;
77fdaa12 1699
b291ba11
JB		 1700 /*
1701 * And in theory even frames from a different AP we were just
1702 * associated to a split-second ago!
1703 */
1704 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1705 return;
1706
17e4ec14
JM		 1707 /* Track average RSSI from the Beacon frames of the current AP */
1708 ifmgd->last_beacon_signal = rx_status->signal;
1709 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1710 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1711 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1712 ifmgd->last_cqm_event_signal = 0;
391a200a 1713 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1714 } else {
1715 ifmgd->ave_beacon_signal =
1716 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1717 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1718 ifmgd->ave_beacon_signal) / 16;
391a200a 1719 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1720 }
1721 if (bss_conf->cqm_rssi_thold &&
391a200a 1722 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1723 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1724 int sig = ifmgd->ave_beacon_signal / 16;
1725 int last_event = ifmgd->last_cqm_event_signal;
1726 int thold = bss_conf->cqm_rssi_thold;
1727 int hyst = bss_conf->cqm_rssi_hyst;
1728 if (sig < thold &&
1729 (last_event == 0 || sig < last_event - hyst)) {
1730 ifmgd->last_cqm_event_signal = sig;
1731 ieee80211_cqm_rssi_notify(
1732 &sdata->vif,
1733 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1734 GFP_KERNEL);
1735 } else if (sig > thold &&
1736 (last_event == 0 || sig > last_event + hyst)) {
1737 ifmgd->last_cqm_event_signal = sig;
1738 ieee80211_cqm_rssi_notify(
1739 &sdata->vif,
1740 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1741 GFP_KERNEL);
1742 }
1743 }
1744
b291ba11 1745 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1746#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1747 if (net_ratelimit()) {
1748 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1749 "to a received beacon\n", sdata->name);
92778180
JM		 1750 }
1751#endif
b291ba11 1752 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1753 mutex_lock(&local->iflist_mtx);
1754 ieee80211_recalc_ps(local, -1);
1755 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1756 }
1757
b291ba11
JB		 1758 /*
1759 * Push the beacon loss detection into the future since
1760 * we are processing a beacon from the AP just now.
1761 */
d3a910a8 1762 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1763
d91f36db
JB		 1764 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1765 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1766 len - baselen, &elems,
1767 care_about_ies, ncrc);
1768
1769 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1770 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1771 ifmgd->aid);
d91f36db 1772
d8ec4433 1773 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1774 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1775 true);
d91f36db 1776
4ced3f74 1777 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1778 elems.wmm_param_len);
1779 }
fe3fa827 1780
25c9c875 1781 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1782 if (directed_tim) {
572e0012
KV		 1783 if (local->hw.conf.dynamic_ps_timeout > 0) {
1784 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1785 ieee80211_hw_config(local,
1786 IEEE80211_CONF_CHANGE_PS);
1787 ieee80211_send_nullfunc(local, sdata, 0);
1788 } else {
1789 local->pspolling = true;
1790
1791 /*
1792 * Here is assumed that the driver will be
1793 * able to send ps-poll frame and receive a
1794 * response even though power save mode is
1795 * enabled, but some drivers might require
1796 * to disable power save here. This needs
1797 * to be investigated.
1798 */
1799 ieee80211_send_pspoll(local, sdata);
1800 }
a97b77b9
VN		 1801 }
1802 }
7a5158ef 1803
d8ec4433 1804 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1805 return;
1806 ifmgd->beacon_crc = ncrc;
d8ec4433 1807 ifmgd->beacon_crc_valid = true;
30196673 1808
7a5158ef
JB		 1809 if (elems.erp_info && elems.erp_info_len >= 1) {
1810 erp_valid = true;
1811 erp_value = elems.erp_info[0];
1812 } else {
1813 erp_valid = false;
50c4afb9 1814 }
7a5158ef
JB		 1815 changed |= ieee80211_handle_bss_capability(sdata,
1816 le16_to_cpu(mgmt->u.beacon.capab_info),
1817 erp_valid, erp_value);
f0706e82 1818
d3c990fb 1819
53d6f81c 1820 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1821 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1822 struct sta_info *sta;
1823 struct ieee80211_supported_band *sband;
1824 u16 ap_ht_cap_flags;
1825
1826 rcu_read_lock();
1827
abe60632 1828 sta = sta_info_get(sdata, bssid);
77fdaa12 1829 if (WARN_ON(!sta)) {
ae5eb026
JB		 1830 rcu_read_unlock();
1831 return;
1832 }
1833
1834 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1835
1836 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1837 elems.ht_cap_elem, &sta->sta.ht_cap);
1838
1839 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1840
1841 rcu_read_unlock();
1842
1843 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1844 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1845 }
1846
8b19e6ca 1847 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1848 if (elems.country_elem) {
a8302de9
VT		 1849 /* TODO: IBSS also needs this */
1850 if (elems.pwr_constr_elem)
1851 ieee80211_handle_pwr_constr(sdata,
1852 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1853 elems.pwr_constr_elem,
1854 elems.pwr_constr_elem_len);
3f2355cb
LR		 1855 }
1856
471b3efd 1857 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1858}
1859
1fa57d01
JB		 1860void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1861 struct sk_buff *skb)
f0706e82 1862{
77fdaa12 1863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1864 struct ieee80211_rx_status *rx_status;
f0706e82 1865 struct ieee80211_mgmt *mgmt;
77fdaa12 1866 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1867 u16 fc;
1868
f0706e82
JB		 1869 rx_status = (struct ieee80211_rx_status *) skb->cb;
1870 mgmt = (struct ieee80211_mgmt *) skb->data;
1871 fc = le16_to_cpu(mgmt->frame_control);
1872
77fdaa12
JB		 1873 mutex_lock(&ifmgd->mtx);
1874
1875 if (ifmgd->associated &&
0c1ad2ca 1876 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1877 switch (fc & IEEE80211_FCTL_STYPE) {
1878 case IEEE80211_STYPE_BEACON:
1879 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1880 rx_status);
1881 break;
1882 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1883 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1884 break;
1885 case IEEE80211_STYPE_DEAUTH:
63f170e0 1886 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1887 break;
1888 case IEEE80211_STYPE_DISASSOC:
1889 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1890 break;
1891 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1892 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1893 case WLAN_CATEGORY_SPECTRUM_MGMT:
1894 ieee80211_sta_process_chanswitch(sdata,
1895 &mgmt->u.action.u.chan_switch.sw_elem,
1896 (void *)ifmgd->associated->priv,
1897 rx_status->mactime);
1898 break;
1899 }
77fdaa12
JB		 1900 }
1901 mutex_unlock(&ifmgd->mtx);
1902
1903 switch (rma) {
1904 case RX_MGMT_NONE:
1905 /* no action */
1906 break;
1907 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1908 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1909 break;
1910 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1911 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1912 break;
1913 default:
1914 WARN(1, "unexpected: %d", rma);
1915 }
36b3a628 1916 return;
77fdaa12
JB		 1917 }
1918
77fdaa12
JB		 1919 mutex_unlock(&ifmgd->mtx);
1920
63f170e0 1921 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1922 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1923 struct ieee80211_local *local = sdata->local;
1924 struct ieee80211_work *wk;
1925
a1699b75 1926 mutex_lock(&local->mtx);
b054b747
JB		 1927 list_for_each_entry(wk, &local->work_list, list) {
1928 if (wk->sdata != sdata)
1929 continue;
1930
e5b900d2
JB		 1931 if (wk->type != IEEE80211_WORK_ASSOC &&
1932 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1933 continue;
1934
1935 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1936 continue;
1937 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1938 continue;
1939
1940 /*
1941 * Printing the message only here means we can't
1942 * spuriously print it, but it also means that it
1943 * won't be printed when the frame comes in before
1944 * we even tried to associate or in similar cases.
1945 *
1946 * Ultimately, I suspect cfg80211 should print the
1947 * messages instead.
1948 */
1949 printk(KERN_DEBUG
1950 "%s: deauthenticated from %pM (Reason: %u)\n",
1951 sdata->name, mgmt->bssid,
1952 le16_to_cpu(mgmt->u.deauth.reason_code));
1953
1954 list_del_rcu(&wk->list);
1955 free_work(wk);
1956 break;
1957 }
a1699b75 1958 mutex_unlock(&local->mtx);
f0706e82 1959
ce470613 1960 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1961 }
f0706e82
JB		 1962}
1963
9c6bd790 1964static void ieee80211_sta_timer(unsigned long data)
f0706e82 1965{
60f8b39c
JB		 1966 struct ieee80211_sub_if_data *sdata =
1967 (struct ieee80211_sub_if_data *) data;
46900298 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1969 struct ieee80211_local *local = sdata->local;
f0706e82 1970
5bb644a0
JB		 1971 if (local->quiescing) {
1972 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1973 return;
1974 }
1975
64592c8f 1976 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1977}
1978
04ac3c0e
FF		 1979static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1980 u8 *bssid)
1981{
1982 struct ieee80211_local *local = sdata->local;
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984
1985 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1986 IEEE80211_STA_BEACON_POLL);
1987
1988 ieee80211_set_disassoc(sdata, true, true);
1989 mutex_unlock(&ifmgd->mtx);
1990 mutex_lock(&local->mtx);
1991 ieee80211_recalc_idle(local);
1992 mutex_unlock(&local->mtx);
1993 /*
1994 * must be outside lock due to cfg80211,
1995 * but that's not a problem.
1996 */
1997 ieee80211_send_deauth_disassoc(sdata, bssid,
1998 IEEE80211_STYPE_DEAUTH,
1999 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2000 NULL, true);
2001 mutex_lock(&ifmgd->mtx);
2002}
2003
1fa57d01 2004void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2005{
9c6bd790 2006 struct ieee80211_local *local = sdata->local;
1fa57d01 2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2008
77fdaa12
JB		 2009 /* then process the rest of the work */
2010 mutex_lock(&ifmgd->mtx);
2011
b291ba11
JB		 2012 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2013 IEEE80211_STA_CONNECTION_POLL) &&
2014 ifmgd->associated) {
a43abf29 2015 u8 bssid[ETH_ALEN];
72a8a3ed 2016 int max_tries;
a43abf29 2017
0c1ad2ca 2018 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2019
72a8a3ed 2020 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2021 max_tries = max_nullfunc_tries;
72a8a3ed 2022 else
180205bd 2023 max_tries = max_probe_tries;
72a8a3ed 2024
4e5ff376
FF		 2025 /* ACK received for nullfunc probing frame */
2026 if (!ifmgd->probe_send_count)
2027 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2028 else if (ifmgd->nullfunc_failed) {
2029 if (ifmgd->probe_send_count < max_tries) {
2030#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2031 wiphy_debug(local->hw.wiphy,
2032 "%s: No ack for nullfunc frame to"
bfc31df3 2033 " AP %pM, try %d/%i\n",
04ac3c0e 2034 sdata->name, bssid,
bfc31df3 2035 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2036#endif
2037 ieee80211_mgd_probe_ap_send(sdata);
2038 } else {
2039#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2040 wiphy_debug(local->hw.wiphy,
2041 "%s: No ack for nullfunc frame to"
2042 " AP %pM, disconnecting.\n",
c658e5db 2043 sdata->name, bssid);
04ac3c0e
FF		 2044#endif
2045 ieee80211_sta_connection_lost(sdata, bssid);
2046 }
2047 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2048 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2049 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2050#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2051 wiphy_debug(local->hw.wiphy,
2052 "%s: Failed to send nullfunc to AP %pM"
2053 " after %dms, disconnecting.\n",
2054 sdata->name,
180205bd 2055 bssid, probe_wait_ms);
04ac3c0e
FF		 2056#endif
2057 ieee80211_sta_connection_lost(sdata, bssid);
2058 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2059#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2060 wiphy_debug(local->hw.wiphy,
2061 "%s: No probe response from AP %pM"
bfc31df3 2062 " after %dms, try %d/%i\n",
b38afa87 2063 sdata->name,
180205bd 2064 bssid, probe_wait_ms,
bfc31df3 2065 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2066#endif
2067 ieee80211_mgd_probe_ap_send(sdata);
2068 } else {
b291ba11
JB		 2069 /*
2070 * We actually lost the connection ... or did we?
2071 * Let's make sure!
2072 */
b38afa87
BG		 2073 wiphy_debug(local->hw.wiphy,
2074 "%s: No probe response from AP %pM"
2075 " after %dms, disconnecting.\n",
2076 sdata->name,
180205bd 2077 bssid, probe_wait_ms);
04ac3c0e
FF		 2078
2079 ieee80211_sta_connection_lost(sdata, bssid);
b291ba11
JB		 2080 }
2081 }
2082
77fdaa12 2083 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2084}
2085
b291ba11
JB		 2086static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2087{
2088 struct ieee80211_sub_if_data *sdata =
2089 (struct ieee80211_sub_if_data *) data;
2090 struct ieee80211_local *local = sdata->local;
2091
2092 if (local->quiescing)
2093 return;
2094
1e4dcd01
JO		 2095 ieee80211_queue_work(&sdata->local->hw,
2096 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2097}
2098
2099static void ieee80211_sta_conn_mon_timer(unsigned long data)
2100{
2101 struct ieee80211_sub_if_data *sdata =
2102 (struct ieee80211_sub_if_data *) data;
2103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2104 struct ieee80211_local *local = sdata->local;
2105
2106 if (local->quiescing)
2107 return;
2108
42935eca 2109 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2110}
2111
2112static void ieee80211_sta_monitor_work(struct work_struct *work)
2113{
2114 struct ieee80211_sub_if_data *sdata =
2115 container_of(work, struct ieee80211_sub_if_data,
2116 u.mgd.monitor_work);
2117
2118 ieee80211_mgd_probe_ap(sdata, false);
2119}
2120
9c6bd790
JB		 2121static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2122{
ad935687 2123 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2124 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2125 IEEE80211_STA_CONNECTION_POLL);
ad935687 2126
b291ba11 2127 /* let's probe the connection once */
42935eca 2128 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2129 &sdata->u.mgd.monitor_work);
2130 /* and do all the other regular work too */
64592c8f 2131 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2132 }
9c6bd790 2133}
f0706e82 2134
5bb644a0
JB		 2135#ifdef CONFIG_PM
2136void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2137{
2138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139
2140 /*
2141 * we need to use atomic bitops for the running bits
2142 * only because both timers might fire at the same
2143 * time -- the code here is properly synchronised.
2144 */
2145
d1f5b7a3
JB		 2146 cancel_work_sync(&ifmgd->request_smps_work);
2147
1e4dcd01 2148 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2149 if (del_timer_sync(&ifmgd->timer))
2150 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2151
2152 cancel_work_sync(&ifmgd->chswitch_work);
2153 if (del_timer_sync(&ifmgd->chswitch_timer))
2154 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2155
2156 cancel_work_sync(&ifmgd->monitor_work);
2157 /* these will just be re-established on connection */
2158 del_timer_sync(&ifmgd->conn_mon_timer);
2159 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2160}
2161
2162void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2163{
2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2165
2166 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2167 add_timer(&ifmgd->timer);
2168 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2169 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2170 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2171 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2172}
2173#endif
2174
9c6bd790
JB		 2175/* interface setup */
2176void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2177{
46900298 2178 struct ieee80211_if_managed *ifmgd;
988c0f72 2179
46900298 2180 ifmgd = &sdata->u.mgd;
b291ba11 2181 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2182 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2183 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2184 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2185 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2186 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2187 (unsigned long) sdata);
b291ba11
JB		 2188 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2189 (unsigned long) sdata);
2190 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2191 (unsigned long) sdata);
46900298 2192 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2193 (unsigned long) sdata);
9c6bd790 2194
ab1faead 2195 ifmgd->flags = 0;
bbbdff9e 2196
77fdaa12 2197 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2198
2199 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2200 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2201 else
2202 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2203}
2204
77fdaa12
JB		 2205/* scan finished notification */
2206void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2207{
77fdaa12 2208 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2209
77fdaa12
JB		 2210 /* Restart STA timers */
2211 rcu_read_lock();
2212 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2213 ieee80211_restart_sta_timer(sdata);
2214 rcu_read_unlock();
2215}
60f8b39c 2216
77fdaa12
JB		 2217int ieee80211_max_network_latency(struct notifier_block *nb,
2218 unsigned long data, void *dummy)
2219{
2220 s32 latency_usec = (s32) data;
2221 struct ieee80211_local *local =
2222 container_of(nb, struct ieee80211_local,
2223 network_latency_notifier);
1fa6f4af 2224
77fdaa12
JB		 2225 mutex_lock(&local->iflist_mtx);
2226 ieee80211_recalc_ps(local, latency_usec);
2227 mutex_unlock(&local->iflist_mtx);
dfe67012 2228
77fdaa12 2229 return 0;
9c6bd790
JB		 2230}
2231
77fdaa12 2232/* config hooks */
af6b6374
JB		 2233static enum work_done_result
2234ieee80211_probe_auth_done(struct ieee80211_work *wk,
2235 struct sk_buff *skb)
2236{
2237 if (!skb) {
2238 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2239 return WORK_DONE_DESTROY;
2240 }
2241
2242 if (wk->type == IEEE80211_WORK_AUTH) {
2243 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2244 return WORK_DONE_DESTROY;
2245 }
2246
2247 mutex_lock(&wk->sdata->u.mgd.mtx);
2248 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2249 mutex_unlock(&wk->sdata->u.mgd.mtx);
2250
2251 wk->type = IEEE80211_WORK_AUTH;
2252 wk->probe_auth.tries = 0;
2253 return WORK_DONE_REQUEUE;
2254}
2255
77fdaa12
JB		 2256int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2257 struct cfg80211_auth_request *req)
9c6bd790 2258{
77fdaa12 2259 const u8 *ssid;
f679f65d 2260 struct ieee80211_work *wk;
77fdaa12 2261 u16 auth_alg;
9c6bd790 2262
d5cdfacb
JM		 2263 if (req->local_state_change)
2264 return 0; /* no need to update mac80211 state */
2265
77fdaa12
JB		 2266 switch (req->auth_type) {
2267 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2268 auth_alg = WLAN_AUTH_OPEN;
2269 break;
2270 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2271 if (IS_ERR(sdata->local->wep_tx_tfm))
2272 return -EOPNOTSUPP;
77fdaa12
JB		 2273 auth_alg = WLAN_AUTH_SHARED_KEY;
2274 break;
2275 case NL80211_AUTHTYPE_FT:
2276 auth_alg = WLAN_AUTH_FT;
2277 break;
2278 case NL80211_AUTHTYPE_NETWORK_EAP:
2279 auth_alg = WLAN_AUTH_LEAP;
2280 break;
2281 default:
2282 return -EOPNOTSUPP;
60f8b39c 2283 }
77fdaa12
JB		 2284
2285 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2286 if (!wk)
9c6bd790 2287 return -ENOMEM;
77fdaa12 2288
5e124bd5 2289 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2290
2291 if (req->ie && req->ie_len) {
2292 memcpy(wk->ie, req->ie, req->ie_len);
2293 wk->ie_len = req->ie_len;
9c6bd790 2294 }
77fdaa12 2295
fffd0934 2296 if (req->key && req->key_len) {
af6b6374
JB		 2297 wk->probe_auth.key_len = req->key_len;
2298 wk->probe_auth.key_idx = req->key_idx;
2299 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2300 }
2301
77fdaa12 2302 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2303 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2304 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2305
af6b6374
JB		 2306 wk->probe_auth.algorithm = auth_alg;
2307 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2308
070bb547
JB		 2309 /* if we already have a probe, don't probe again */
2310 if (req->bss->proberesp_ies)
2311 wk->type = IEEE80211_WORK_AUTH;
2312 else
2313 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2314 wk->chan = req->bss->channel;
4d51e149 2315 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2316 wk->sdata = sdata;
2317 wk->done = ieee80211_probe_auth_done;
77fdaa12 2318
af6b6374 2319 ieee80211_add_work(wk);
9c6bd790 2320 return 0;
60f8b39c
JB		 2321}
2322
af6b6374
JB		 2323static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2324 struct sk_buff *skb)
2325{
2326 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2327 struct ieee80211_rx_status *rx_status;
2328 struct ieee802_11_elems elems;
af6b6374
JB		 2329 u16 status;
2330
2331 if (!skb) {
2332 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2333 return WORK_DONE_DESTROY;
2334 }
2335
e5b900d2
JB		 2336 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2337 mutex_lock(&wk->sdata->u.mgd.mtx);
2338 rx_status = (void *) skb->cb;
2339 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2340 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2341 &elems, true);
2342 mutex_unlock(&wk->sdata->u.mgd.mtx);
2343
2344 wk->type = IEEE80211_WORK_ASSOC;
2345 /* not really done yet */
2346 return WORK_DONE_REQUEUE;
2347 }
2348
af6b6374
JB		 2349 mgmt = (void *)skb->data;
2350 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2351
2352 if (status == WLAN_STATUS_SUCCESS) {
2353 mutex_lock(&wk->sdata->u.mgd.mtx);
2354 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2355 mutex_unlock(&wk->sdata->u.mgd.mtx);
2356 /* oops -- internal error -- send timeout for now */
2357 cfg80211_send_assoc_timeout(wk->sdata->dev,
2358 wk->filter_ta);
2359 return WORK_DONE_DESTROY;
2360 }
68542962
JO		 2361
2362 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2363 }
2364
2365 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2366 return WORK_DONE_DESTROY;
2367}
2368
77fdaa12
JB		 2369int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2370 struct cfg80211_assoc_request *req)
f0706e82 2371{
77fdaa12 2372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2373 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2374 struct ieee80211_work *wk;
63f170e0 2375 const u8 *ssid;
af6b6374 2376 int i;
f0706e82 2377
77fdaa12 2378 mutex_lock(&ifmgd->mtx);
af6b6374 2379 if (ifmgd->associated) {
9c87ba67
JM		 2380 if (!req->prev_bssid ||
2381 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2382 ETH_ALEN)) {
2383 /*
2384 * We are already associated and the request was not a
2385 * reassociation request from the current BSS, so
2386 * reject it.
2387 */
2388 mutex_unlock(&ifmgd->mtx);
2389 return -EALREADY;
2390 }
2391
2392 /* Trying to reassociate - clear previous association state */
53f73c09 2393 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2394 }
2395 mutex_unlock(&ifmgd->mtx);
77fdaa12 2396
63f170e0 2397 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2398 if (!wk)
2399 return -ENOMEM;
77fdaa12 2400
77fdaa12 2401 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2402 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2403
d8ec4433
JO		 2404 ifmgd->beacon_crc_valid = false;
2405
77fdaa12
JB		 2406 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2407 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2408 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2409 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2410 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2411
77fdaa12
JB		 2412
2413 if (req->ie && req->ie_len) {
2414 memcpy(wk->ie, req->ie, req->ie_len);
2415 wk->ie_len = req->ie_len;
2416 } else
2417 wk->ie_len = 0;
2418
0c1ad2ca 2419 wk->assoc.bss = req->bss;
f679f65d 2420
af6b6374 2421 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2422
af6b6374
JB		 2423 /* new association always uses requested smps mode */
2424 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2425 if (ifmgd->powersave)
2426 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2427 else
2428 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2429 } else
2430 ifmgd->ap_smps = ifmgd->req_smps;
2431
2432 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2433 /*
2434 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2435 * We still associate in non-HT mode (11a/b/g) if any one of these
2436 * ciphers is configured as pairwise.
2437 * We can set this to true for non-11n hardware, that'll be checked
2438 * separately along with the peer capabilities.
2439 */
af6b6374 2440 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2441 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2442 wk->assoc.wmm_used = bss->wmm_used;
2443 wk->assoc.supp_rates = bss->supp_rates;
2444 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2445 wk->assoc.ht_information_ie =
2446 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2447
ab13315a
KV		 2448 if (bss->wmm_used && bss->uapsd_supported &&
2449 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2450 wk->assoc.uapsd_used = true;
2451 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2452 } else {
2453 wk->assoc.uapsd_used = false;
2454 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2455 }
2456
63f170e0 2457 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2458 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2459 wk->assoc.ssid_len = ssid[1];
63f170e0 2460
77fdaa12 2461 if (req->prev_bssid)
f679f65d 2462 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2463
f679f65d 2464 wk->chan = req->bss->channel;
4d51e149 2465 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2466 wk->sdata = sdata;
2467 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2468 if (!bss->dtim_period &&
2469 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2470 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2471 else
2472 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2473
2474 if (req->use_mfp) {
2475 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2476 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2477 } else {
2478 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2479 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2480 }
2481
2482 if (req->crypto.control_port)
2483 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2484 else
2485 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2486
a621fa4d
JB		 2487 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2488 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2489
af6b6374
JB		 2490 ieee80211_add_work(wk);
2491 return 0;
f0706e82
JB		 2492}
2493
77fdaa12 2494int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2495 struct cfg80211_deauth_request *req,
2496 void *cookie)
f0706e82 2497{
af6b6374 2498 struct ieee80211_local *local = sdata->local;
46900298 2499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2500 struct ieee80211_work *wk;
05e48e8e
JM		 2501 u8 bssid[ETH_ALEN];
2502 bool assoc_bss = false;
f0706e82 2503
77fdaa12
JB		 2504 mutex_lock(&ifmgd->mtx);
2505
05e48e8e 2506 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2507 if (ifmgd->associated == req->bss) {
53f73c09 2508 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2509 mutex_unlock(&ifmgd->mtx);
05e48e8e 2510 assoc_bss = true;
af6b6374
JB		 2511 } else {
2512 bool not_auth_yet = false;
f0706e82 2513
a58ce43f 2514 mutex_unlock(&ifmgd->mtx);
a58ce43f 2515
a1699b75 2516 mutex_lock(&local->mtx);
af6b6374 2517 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2518 if (wk->sdata != sdata)
af6b6374 2519 continue;
29165e4c
JB		 2520
2521 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2522 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2523 wk->type != IEEE80211_WORK_ASSOC &&
2524 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2525 continue;
2526
af6b6374
JB		 2527 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2528 continue;
29165e4c
JB		 2529
2530 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2531 list_del_rcu(&wk->list);
af6b6374
JB		 2532 free_work(wk);
2533 break;
2534 }
a1699b75 2535 mutex_unlock(&local->mtx);
af6b6374
JB		 2536
2537 /*
2538 * If somebody requests authentication and we haven't
2539 * sent out an auth frame yet there's no need to send
2540 * out a deauth frame either. If the state was PROBE,
2541 * then this is the case. If it's AUTH we have sent a
2542 * frame, and if it's IDLE we have completed the auth
2543 * process already.
2544 */
2545 if (not_auth_yet) {
2546 __cfg80211_auth_canceled(sdata->dev, bssid);
2547 return 0;
2548 }
2549 }
77fdaa12 2550
0ff71613 2551 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2552 sdata->name, bssid, req->reason_code);
0ff71613 2553
d5cdfacb
JM		 2554 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2555 req->reason_code, cookie,
2556 !req->local_state_change);
05e48e8e
JM		 2557 if (assoc_bss)
2558 sta_info_destroy_addr(sdata, bssid);
f0706e82 2559
7da7cc1d 2560 mutex_lock(&sdata->local->mtx);
bc83b681 2561 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2562 mutex_unlock(&sdata->local->mtx);
bc83b681 2563
f0706e82
JB		 2564 return 0;
2565}
84363e6e 2566
77fdaa12 2567int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2568 struct cfg80211_disassoc_request *req,
2569 void *cookie)
9c6bd790 2570{
77fdaa12 2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2572 u8 bssid[ETH_ALEN];
9c6bd790 2573
77fdaa12 2574 mutex_lock(&ifmgd->mtx);
10f644a4 2575
8d8b261a
JB		 2576 /*
2577 * cfg80211 should catch this ... but it's racy since
2578 * we can receive a disassoc frame, process it, hand it
2579 * to cfg80211 while that's in a locked section already
2580 * trying to tell us that the user wants to disconnect.
2581 */
0c1ad2ca 2582 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2583 mutex_unlock(&ifmgd->mtx);
2584 return -ENOLINK;
2585 }
2586
0ff71613 2587 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2588 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2589
e69e95db 2590 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2591 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2592
2593 mutex_unlock(&ifmgd->mtx);
10f644a4 2594
77fdaa12 2595 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2596 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2597 cookie, !req->local_state_change);
e69e95db 2598 sta_info_destroy_addr(sdata, bssid);
bc83b681 2599
7da7cc1d 2600 mutex_lock(&sdata->local->mtx);
bc83b681 2601 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2602 mutex_unlock(&sdata->local->mtx);
bc83b681 2603
10f644a4
JB		 2604 return 0;
2605}
026331c4 2606
a97c13c3
JO		 2607void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2608 enum nl80211_cqm_rssi_threshold_event rssi_event,
2609 gfp_t gfp)
2610{
2611 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2612
b5878a2d
JB		 2613 trace_api_cqm_rssi_notify(sdata, rssi_event);
2614
a97c13c3
JO		 2615 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2616}
2617EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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