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mac80211: remove few obsolete flags
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
77fdaa12 163 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 164{
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_supported_band *sband;
d5522e03
JB		 167 struct sta_info *sta;
168 u32 changed = 0;
172710bf 169 int hti_cfreq;
9ed6bcce 170 u16 ht_opmode;
0aaffa9b
JB		 171 bool enable_ht = true;
172 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 173 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
174
175 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176
0aaffa9b
JB		 177 prev_chantype = sdata->vif.bss_conf.channel_type;
178
d5522e03
JB		 179 /* HT is not supported */
180 if (!sband->ht_cap.ht_supported)
181 enable_ht = false;
182
172710bf
BG		 183 if (enable_ht) {
184 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
185 sband->band);
186 /* check that channel matches the right operating channel */
187 if (local->hw.conf.channel->center_freq != hti_cfreq) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
191 */
192 printk(KERN_DEBUG
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
197 sdata->name,
198 local->hw.conf.channel->center_freq,
199 hti_cfreq, hti->control_chan,
200 sband->band);
201 enable_ht = false;
202 }
203 }
d5522e03
JB		 204
205 if (enable_ht) {
206 channel_type = NL80211_CHAN_HT20;
207
208 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
209 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
210 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
211 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40PLUS))
215 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 216 break;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 218 if (!(local->hw.conf.channel->flags &
219 IEEE80211_CHAN_NO_HT40MINUS))
220 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 221 break;
222 }
223 }
224 }
225
fe6f212c
RC		 226 if (local->tmp_channel)
227 local->tmp_channel_type = channel_type;
d5522e03 228
0aaffa9b
JB		 229 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type = NL80211_CHAN_HT20;
232 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
233 }
d5522e03 234
0aaffa9b
JB		 235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local, 0);
d5522e03 237
0aaffa9b 238 if (prev_chantype != channel_type) {
d5522e03 239 rcu_read_lock();
abe60632 240 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 241 if (sta)
242 rate_control_rate_update(local, sband, sta,
4fa00437 243 IEEE80211_RC_HT_CHANGED,
0aaffa9b 244 channel_type);
d5522e03 245 rcu_read_unlock();
0aaffa9b 246 }
d5522e03 247
9ed6bcce 248 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 249
250 /* if bss configuration changed store the new one */
0aaffa9b
JB		 251 if (sdata->ht_opmode_valid != enable_ht ||
252 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
253 prev_chantype != channel_type) {
d5522e03 254 changed |= BSS_CHANGED_HT;
9ed6bcce 255 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 256 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 257 }
258
259 return changed;
260}
261
9c6bd790
JB		 262/* frame sending functions */
263
ef422bc0 264static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 265 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 266 void *cookie, bool send_frame)
9ac19a90
JB		 267{
268 struct ieee80211_local *local = sdata->local;
46900298 269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 270 struct sk_buff *skb;
271 struct ieee80211_mgmt *mgmt;
9aed3cc1 272
65fc73ac 273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 274 if (!skb) {
ef422bc0 275 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 276 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 277 return;
278 }
279 skb_reserve(skb, local->hw.extra_tx_headroom);
280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
77fdaa12 283 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 284 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 285 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 286 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 287 skb_put(skb, 2);
ef422bc0 288 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 289 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
290
53b46b84 291 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 292 if (cookie)
293 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
294 else
295 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 296 else
ce470613
HS		 297 if (cookie)
298 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
299 else
300 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 301 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
302 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 303
304 if (send_frame)
305 ieee80211_tx_skb(sdata, skb);
306 else
307 kfree_skb(skb);
9ac19a90
JB		 308}
309
572e0012
KV		 310void ieee80211_send_pspoll(struct ieee80211_local *local,
311 struct ieee80211_sub_if_data *sdata)
312{
572e0012
KV		 313 struct ieee80211_pspoll *pspoll;
314 struct sk_buff *skb;
572e0012 315
d8cd189e
KV		 316 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
317 if (!skb)
572e0012 318 return;
572e0012 319
d8cd189e
KV		 320 pspoll = (struct ieee80211_pspoll *) skb->data;
321 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 322
62ae67be
JB		 323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 325}
326
965bedad
JB		 327void ieee80211_send_nullfunc(struct ieee80211_local *local,
328 struct ieee80211_sub_if_data *sdata,
329 int powersave)
330{
331 struct sk_buff *skb;
d8cd189e 332 struct ieee80211_hdr_3addr *nullfunc;
965bedad 333
d8cd189e
KV		 334 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
335 if (!skb)
965bedad 336 return;
965bedad 337
d8cd189e 338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 339 if (powersave)
d8cd189e 340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 341
62ae67be
JB		 342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
343 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 344}
345
d524215f
FF		 346static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
347 struct ieee80211_sub_if_data *sdata)
348{
349 struct sk_buff *skb;
350 struct ieee80211_hdr *nullfunc;
351 __le16 fc;
352
353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
354 return;
355
356 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
357 if (!skb) {
358 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
359 "nullfunc frame\n", sdata->name);
360 return;
361 }
362 skb_reserve(skb, local->hw.extra_tx_headroom);
363
364 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
365 memset(nullfunc, 0, 30);
366 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
367 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
368 nullfunc->frame_control = fc;
369 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
370 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
371 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
372 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
373
374 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
375 ieee80211_tx_skb(sdata, skb);
376}
377
cc32abd4
JB		 378/* spectrum management related things */
379static void ieee80211_chswitch_work(struct work_struct *work)
380{
381 struct ieee80211_sub_if_data *sdata =
382 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
384
9607e6b6 385 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 386 return;
387
77fdaa12
JB		 388 mutex_lock(&ifmgd->mtx);
389 if (!ifmgd->associated)
390 goto out;
cc32abd4
JB		 391
392 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 393 if (!sdata->local->ops->channel_switch) {
394 /* call "hw_config" only if doing sw channel switch */
395 ieee80211_hw_config(sdata->local,
396 IEEE80211_CONF_CHANGE_CHANNEL);
397 }
77fdaa12 398
cc32abd4 399 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 400 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 401
cc32abd4
JB		 402 ieee80211_wake_queues_by_reason(&sdata->local->hw,
403 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 404 out:
405 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
406 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 407}
408
5ce6e438
JB		 409void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
410{
411 struct ieee80211_sub_if_data *sdata;
412 struct ieee80211_if_managed *ifmgd;
413
414 sdata = vif_to_sdata(vif);
415 ifmgd = &sdata->u.mgd;
416
417 trace_api_chswitch_done(sdata, success);
418 if (!success) {
419 /*
420 * If the channel switch was not successful, stay
421 * around on the old channel. We currently lack
422 * good handling of this situation, possibly we
423 * should just drop the association.
424 */
425 sdata->local->csa_channel = sdata->local->oper_channel;
426 }
427
428 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
429}
430EXPORT_SYMBOL(ieee80211_chswitch_done);
431
cc32abd4
JB		 432static void ieee80211_chswitch_timer(unsigned long data)
433{
434 struct ieee80211_sub_if_data *sdata =
435 (struct ieee80211_sub_if_data *) data;
436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
437
5bb644a0
JB		 438 if (sdata->local->quiescing) {
439 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
440 return;
441 }
442
42935eca 443 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 444}
445
446void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
447 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 448 struct ieee80211_bss *bss,
449 u64 timestamp)
cc32abd4 450{
0c1ad2ca
JB		 451 struct cfg80211_bss *cbss =
452 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 453 struct ieee80211_channel *new_ch;
454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 455 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
456 cbss->channel->band);
cc32abd4 457
77fdaa12
JB		 458 ASSERT_MGD_MTX(ifmgd);
459
460 if (!ifmgd->associated)
cc32abd4
JB		 461 return;
462
fbe9c429 463 if (sdata->local->scanning)
cc32abd4
JB		 464 return;
465
466 /* Disregard subsequent beacons if we are already running a timer
467 processing a CSA */
468
469 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
470 return;
471
472 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
473 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
474 return;
475
476 sdata->local->csa_channel = new_ch;
477
5ce6e438
JB		 478 if (sdata->local->ops->channel_switch) {
479 /* use driver's channel switch callback */
480 struct ieee80211_channel_switch ch_switch;
481 memset(&ch_switch, 0, sizeof(ch_switch));
482 ch_switch.timestamp = timestamp;
483 if (sw_elem->mode) {
484 ch_switch.block_tx = true;
485 ieee80211_stop_queues_by_reason(&sdata->local->hw,
486 IEEE80211_QUEUE_STOP_REASON_CSA);
487 }
488 ch_switch.channel = new_ch;
489 ch_switch.count = sw_elem->count;
490 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
491 drv_channel_switch(sdata->local, &ch_switch);
492 return;
493 }
494
495 /* channel switch handled in software */
cc32abd4 496 if (sw_elem->count <= 1) {
42935eca 497 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 498 } else {
9feaddc7
WYG		 499 if (sw_elem->mode)
500 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 501 IEEE80211_QUEUE_STOP_REASON_CSA);
502 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
503 mod_timer(&ifmgd->chswitch_timer,
504 jiffies +
505 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 506 cbss->beacon_interval));
cc32abd4
JB		 507 }
508}
509
510static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
511 u16 capab_info, u8 *pwr_constr_elem,
512 u8 pwr_constr_elem_len)
513{
514 struct ieee80211_conf *conf = &sdata->local->hw.conf;
515
516 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
517 return;
518
519 /* Power constraint IE length should be 1 octet */
520 if (pwr_constr_elem_len != 1)
521 return;
522
523 if ((*pwr_constr_elem <= conf->channel->max_power) &&
524 (*pwr_constr_elem != sdata->local->power_constr_level)) {
525 sdata->local->power_constr_level = *pwr_constr_elem;
526 ieee80211_hw_config(sdata->local, 0);
527 }
528}
529
f90754c1
JO		 530void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
531{
532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
533 struct ieee80211_local *local = sdata->local;
534 struct ieee80211_conf *conf = &local->hw.conf;
535
536 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
537 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
538 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
539
540 local->disable_dynamic_ps = false;
541 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
542}
543EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
544
545void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
546{
547 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
548 struct ieee80211_local *local = sdata->local;
549 struct ieee80211_conf *conf = &local->hw.conf;
550
551 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
552 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
553 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
554
555 local->disable_dynamic_ps = true;
556 conf->dynamic_ps_timeout = 0;
557 del_timer_sync(&local->dynamic_ps_timer);
558 ieee80211_queue_work(&local->hw,
559 &local->dynamic_ps_enable_work);
560}
561EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
562
965bedad
JB		 563/* powersave */
564static void ieee80211_enable_ps(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata)
566{
567 struct ieee80211_conf *conf = &local->hw.conf;
568
d5edaedc
JB		 569 /*
570 * If we are scanning right now then the parameters will
571 * take effect when scan finishes.
572 */
fbe9c429 573 if (local->scanning)
d5edaedc
JB		 574 return;
575
965bedad
JB		 576 if (conf->dynamic_ps_timeout > 0 &&
577 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
578 mod_timer(&local->dynamic_ps_timer, jiffies +
579 msecs_to_jiffies(conf->dynamic_ps_timeout));
580 } else {
581 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
582 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 583
2a13052f
JO		 584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
585 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
586 return;
587
588 conf->flags |= IEEE80211_CONF_PS;
589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 590 }
591}
592
593static void ieee80211_change_ps(struct ieee80211_local *local)
594{
595 struct ieee80211_conf *conf = &local->hw.conf;
596
597 if (local->ps_sdata) {
965bedad
JB		 598 ieee80211_enable_ps(local, local->ps_sdata);
599 } else if (conf->flags & IEEE80211_CONF_PS) {
600 conf->flags &= ~IEEE80211_CONF_PS;
601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 del_timer_sync(&local->dynamic_ps_timer);
603 cancel_work_sync(&local->dynamic_ps_enable_work);
604 }
605}
606
808118cb
JY		 607static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
608{
609 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
610 struct sta_info *sta = NULL;
611 u32 sta_flags = 0;
612
613 if (!mgd->powersave)
614 return false;
615
616 if (!mgd->associated)
617 return false;
618
619 if (!mgd->associated->beacon_ies)
620 return false;
621
622 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
623 IEEE80211_STA_CONNECTION_POLL))
624 return false;
625
626 rcu_read_lock();
627 sta = sta_info_get(sdata, mgd->bssid);
628 if (sta)
629 sta_flags = get_sta_flags(sta);
630 rcu_read_unlock();
631
632 if (!(sta_flags & WLAN_STA_AUTHORIZED))
633 return false;
634
635 return true;
636}
637
965bedad 638/* need to hold RTNL or interface lock */
10f644a4 639void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 640{
641 struct ieee80211_sub_if_data *sdata, *found = NULL;
642 int count = 0;
195e294d 643 int timeout;
965bedad
JB		 644
645 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
646 local->ps_sdata = NULL;
647 return;
648 }
649
af6b6374
JB		 650 if (!list_empty(&local->work_list)) {
651 local->ps_sdata = NULL;
652 goto change;
653 }
654
965bedad 655 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 656 if (!ieee80211_sdata_running(sdata))
965bedad 657 continue;
8c7914de
RM		 658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
659 /* If an AP vif is found, then disable PS
660 * by setting the count to zero thereby setting
661 * ps_sdata to NULL.
662 */
663 count = 0;
664 break;
665 }
965bedad
JB		 666 if (sdata->vif.type != NL80211_IFTYPE_STATION)
667 continue;
668 found = sdata;
669 count++;
670 }
671
808118cb 672 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 673 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 674 s32 beaconint_us;
675
676 if (latency < 0)
ed77134b 677 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 678
679 beaconint_us = ieee80211_tu_to_usec(
680 found->vif.bss_conf.beacon_int);
681
ff616381 682 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 683 if (timeout < 0) {
684 /*
ff616381
JO		 685 * Go to full PSM if the user configures a very low
686 * latency requirement.
0ab82b04
EP		 687 * The 2000 second value is there for compatibility
688 * until the PM_QOS_NETWORK_LATENCY is configured
689 * with real values.
195e294d 690 */
0ab82b04
EP		 691 if (latency > (1900 * USEC_PER_MSEC) &&
692 latency != (2000 * USEC_PER_SEC))
195e294d 693 timeout = 0;
ff616381
JO		 694 else
695 timeout = 100;
195e294d 696 }
f90754c1
JO		 697 local->dynamic_ps_user_timeout = timeout;
698 if (!local->disable_dynamic_ps)
699 conf->dynamic_ps_timeout =
700 local->dynamic_ps_user_timeout;
195e294d 701
04fe2037 702 if (beaconint_us > latency) {
10f644a4 703 local->ps_sdata = NULL;
04fe2037 704 } else {
56007a02 705 struct ieee80211_bss *bss;
04fe2037 706 int maxslp = 1;
56007a02 707 u8 dtimper;
04fe2037 708
56007a02
JB		 709 bss = (void *)found->u.mgd.associated->priv;
710 dtimper = bss->dtim_period;
711
712 /* If the TIM IE is invalid, pretend the value is 1 */
713 if (!dtimper)
714 dtimper = 1;
715 else if (dtimper > 1)
04fe2037
JB		 716 maxslp = min_t(int, dtimper,
717 latency / beaconint_us);
718
9ccebe61 719 local->hw.conf.max_sleep_period = maxslp;
56007a02 720 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 721 local->ps_sdata = found;
04fe2037 722 }
10f644a4 723 } else {
965bedad 724 local->ps_sdata = NULL;
10f644a4 725 }
965bedad 726
af6b6374 727 change:
965bedad
JB		 728 ieee80211_change_ps(local);
729}
730
731void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
732{
733 struct ieee80211_local *local =
734 container_of(work, struct ieee80211_local,
735 dynamic_ps_disable_work);
736
737 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
738 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
740 }
741
742 ieee80211_wake_queues_by_reason(&local->hw,
743 IEEE80211_QUEUE_STOP_REASON_PS);
744}
745
746void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
747{
748 struct ieee80211_local *local =
749 container_of(work, struct ieee80211_local,
750 dynamic_ps_enable_work);
751 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 752 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 753
754 /* can only happen when PS was just disabled anyway */
755 if (!sdata)
756 return;
757
758 if (local->hw.conf.flags & IEEE80211_CONF_PS)
759 return;
760
375177bf 761 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 762 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
763 netif_tx_stop_all_queues(sdata->dev);
764 /*
765 * Flush all the frames queued in the driver before
766 * going to power save
767 */
768 drv_flush(local, false);
965bedad
JB		 769 ieee80211_send_nullfunc(local, sdata, 1);
770
f3e85b9e
VN		 771 /* Flush once again to get the tx status of nullfunc frame */
772 drv_flush(local, false);
773 }
774
2a13052f
JO		 775 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
776 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 777 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
778 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
779 local->hw.conf.flags |= IEEE80211_CONF_PS;
780 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
781 }
f3e85b9e
VN		 782
783 netif_tx_start_all_queues(sdata->dev);
965bedad
JB		 784}
785
786void ieee80211_dynamic_ps_timer(unsigned long data)
787{
788 struct ieee80211_local *local = (void *) data;
789
78f1a8b7 790 if (local->quiescing || local->suspended)
5bb644a0
JB		 791 return;
792
42935eca 793 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 794}
795
60f8b39c 796/* MLME */
f698d856 797static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 798 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 799 u8 *wmm_param, size_t wmm_param_len)
800{
f0706e82 801 struct ieee80211_tx_queue_params params;
4ced3f74 802 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 803 size_t left;
804 int count;
ab13315a 805 u8 *pos, uapsd_queues = 0;
f0706e82 806
e1b3ec1a
SG		 807 if (!local->ops->conf_tx)
808 return;
809
af6b6374 810 if (local->hw.queues < 4)
3434fbd3
JB		 811 return;
812
813 if (!wmm_param)
814 return;
815
f0706e82
JB		 816 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
817 return;
ab13315a
KV		 818
819 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 820 uapsd_queues = local->uapsd_queues;
ab13315a 821
f0706e82 822 count = wmm_param[6] & 0x0f;
46900298 823 if (count == ifmgd->wmm_last_param_set)
f0706e82 824 return;
46900298 825 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 826
827 pos = wmm_param + 8;
828 left = wmm_param_len - 8;
829
830 memset(&params, 0, sizeof(params));
831
f0706e82
JB		 832 local->wmm_acm = 0;
833 for (; left >= 4; left -= 4, pos += 4) {
834 int aci = (pos[0] >> 5) & 0x03;
835 int acm = (pos[0] >> 4) & 0x01;
ab13315a 836 bool uapsd = false;
f0706e82
JB		 837 int queue;
838
839 switch (aci) {
0eeb59fe 840 case 1: /* AC_BK */
e100bb64 841 queue = 3;
988c0f72 842 if (acm)
0eeb59fe 843 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 844 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
845 uapsd = true;
f0706e82 846 break;
0eeb59fe 847 case 2: /* AC_VI */
e100bb64 848 queue = 1;
988c0f72 849 if (acm)
0eeb59fe 850 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 851 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
852 uapsd = true;
f0706e82 853 break;
0eeb59fe 854 case 3: /* AC_VO */
e100bb64 855 queue = 0;
988c0f72 856 if (acm)
0eeb59fe 857 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 858 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
859 uapsd = true;
f0706e82 860 break;
0eeb59fe 861 case 0: /* AC_BE */
f0706e82 862 default:
e100bb64 863 queue = 2;
988c0f72 864 if (acm)
0eeb59fe 865 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 866 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
867 uapsd = true;
f0706e82
JB		 868 break;
869 }
870
871 params.aifs = pos[0] & 0x0f;
872 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
873 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 874 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 875 params.uapsd = uapsd;
876
f4ea83dd 877#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 878 wiphy_debug(local->hw.wiphy,
879 "WMM queue=%d aci=%d acm=%d aifs=%d "
880 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
881 queue, aci, acm,
882 params.aifs, params.cw_min, params.cw_max,
883 params.txop, params.uapsd);
3330d7be 884#endif
e1b3ec1a 885 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 886 wiphy_debug(local->hw.wiphy,
887 "failed to set TX queue parameters for queue %d\n",
888 queue);
f0706e82 889 }
e1b3ec1a
SG		 890
891 /* enable WMM or activate new settings */
4ced3f74
JB		 892 sdata->vif.bss_conf.qos = true;
893 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 894}
895
7a5158ef
JB		 896static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
897 u16 capab, bool erp_valid, u8 erp)
5628221c 898{
bda3933a 899 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 900 u32 changed = 0;
7a5158ef
JB		 901 bool use_protection;
902 bool use_short_preamble;
903 bool use_short_slot;
904
905 if (erp_valid) {
906 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
907 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
908 } else {
909 use_protection = false;
910 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
911 }
912
913 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 914 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
915 use_short_slot = true;
5628221c 916
471b3efd 917 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 918 bss_conf->use_cts_prot = use_protection;
919 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 920 }
7e9ed188 921
d43c7b37 922 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 923 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 924 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 925 }
d9430a32 926
7a5158ef 927 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 928 bss_conf->use_short_slot = use_short_slot;
929 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 930 }
931
932 return changed;
933}
934
f698d856 935static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 936 struct cfg80211_bss *cbss,
ae5eb026 937 u32 bss_info_changed)
f0706e82 938{
0c1ad2ca 939 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 940 struct ieee80211_local *local = sdata->local;
68542962 941 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 942
ae5eb026 943 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 944 /* set timing information */
68542962
JO		 945 bss_conf->beacon_int = cbss->beacon_interval;
946 bss_conf->timestamp = cbss->tsf;
5628221c 947
77fdaa12
JB		 948 bss_info_changed |= BSS_CHANGED_BEACON_INT;
949 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 950 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 951
7ccc8bd7
FF		 952 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
953 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
954
0c1ad2ca
JB		 955 sdata->u.mgd.associated = cbss;
956 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 957
17e4ec14
JM		 958 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
959
b291ba11
JB		 960 /* just to be sure */
961 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
962 IEEE80211_STA_BEACON_POLL);
963
9ac19a90 964 ieee80211_led_assoc(local, 1);
9306102e 965
e5b900d2
JB		 966 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
967 bss_conf->dtim_period = bss->dtim_period;
968 else
969 bss_conf->dtim_period = 0;
970
68542962 971 bss_conf->assoc = 1;
96dd22ac
JB		 972 /*
973 * For now just always ask the driver to update the basic rateset
974 * when we have associated, we aren't checking whether it actually
975 * changed or not.
976 */
ae5eb026 977 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 978
979 /* And the BSSID changed - we're associated now */
980 bss_info_changed |= BSS_CHANGED_BSSID;
981
a97c13c3
JO		 982 /* Tell the driver to monitor connection quality (if supported) */
983 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 984 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 985 bss_info_changed |= BSS_CHANGED_CQM;
986
68542962
JO		 987 /* Enable ARP filtering */
988 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
989 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
990 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
991 }
992
ae5eb026 993 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 994
056508dc
JB		 995 mutex_lock(&local->iflist_mtx);
996 ieee80211_recalc_ps(local, -1);
025e6be2 997 ieee80211_recalc_smps(local);
056508dc 998 mutex_unlock(&local->iflist_mtx);
e0cb686f 999
8a5b33f5 1000 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1001 netif_carrier_on(sdata->dev);
f0706e82
JB		 1002}
1003
e69e95db 1004static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1005 bool remove_sta, bool tx)
aa458d17 1006{
46900298 1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1008 struct ieee80211_local *local = sdata->local;
1009 struct sta_info *sta;
e0cb686f 1010 u32 changed = 0, config_changed = 0;
b291ba11 1011 u8 bssid[ETH_ALEN];
aa458d17 1012
77fdaa12
JB		 1013 ASSERT_MGD_MTX(ifmgd);
1014
b291ba11
JB		 1015 if (WARN_ON(!ifmgd->associated))
1016 return;
1017
0c1ad2ca 1018 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1019
77fdaa12
JB		 1020 ifmgd->associated = NULL;
1021 memset(ifmgd->bssid, 0, ETH_ALEN);
1022
1023 /*
1024 * we need to commit the associated = NULL change because the
1025 * scan code uses that to determine whether this iface should
1026 * go to/wake up from powersave or not -- and could otherwise
1027 * wake the queues erroneously.
1028 */
1029 smp_mb();
1030
1031 /*
1032 * Thus, we can only afterwards stop the queues -- to account
1033 * for the case where another CPU is finishing a scan at this
1034 * time -- we don't want the scan code to enable queues.
1035 */
aa458d17 1036
8a5b33f5 1037 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1038 netif_carrier_off(sdata->dev);
1039
2a419056 1040 mutex_lock(&local->sta_mtx);
abe60632 1041 sta = sta_info_get(sdata, bssid);
4cad6c7c 1042 if (sta) {
2a419056 1043 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1044 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1045 }
2a419056 1046 mutex_unlock(&local->sta_mtx);
aa458d17 1047
f5e5bf25
TW		 1048 changed |= ieee80211_reset_erp_info(sdata);
1049
f5e5bf25 1050 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1051 changed |= BSS_CHANGED_ASSOC;
1052 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1053
aa837e1d
JB		 1054 ieee80211_set_wmm_default(sdata);
1055
4797938c 1056 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1057 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1058
413ad50a
JB		 1059 /* on the next assoc, re-program HT parameters */
1060 sdata->ht_opmode_valid = false;
1061
a8302de9
VT		 1062 local->power_constr_level = 0;
1063
520eb820
KV		 1064 del_timer_sync(&local->dynamic_ps_timer);
1065 cancel_work_sync(&local->dynamic_ps_enable_work);
1066
e0cb686f
KV		 1067 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1068 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1069 config_changed |= IEEE80211_CONF_CHANGE_PS;
1070 }
ae5eb026 1071
e0cb686f 1072 ieee80211_hw_config(local, config_changed);
9cef8737 1073
68542962
JO		 1074 /* Disable ARP filtering */
1075 if (sdata->vif.bss_conf.arp_filter_enabled) {
1076 sdata->vif.bss_conf.arp_filter_enabled = false;
1077 changed |= BSS_CHANGED_ARP_FILTER;
1078 }
1079
0aaffa9b
JB		 1080 /* The BSSID (not really interesting) and HT changed */
1081 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1082 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1083
e69e95db
JM		 1084 if (remove_sta)
1085 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1086
1087 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1088 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1089 del_timer_sync(&sdata->u.mgd.timer);
1090 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1091}
f0706e82 1092
3cf335d5
KV		 1093void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1094 struct ieee80211_hdr *hdr)
1095{
1096 /*
1097 * We can postpone the mgd.timer whenever receiving unicast frames
1098 * from AP because we know that the connection is working both ways
1099 * at that time. But multicast frames (and hence also beacons) must
1100 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1101 * data idle periods for sending the periodic probe request to the
1102 * AP we're connected to.
3cf335d5 1103 */
b291ba11
JB		 1104 if (is_multicast_ether_addr(hdr->addr1))
1105 return;
1106
be099e82 1107 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1108}
f0706e82 1109
4e5ff376
FF		 1110static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1111{
1112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1113
1114 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1115 IEEE80211_STA_CONNECTION_POLL)))
1116 return;
1117
1118 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1119 IEEE80211_STA_BEACON_POLL);
1120 mutex_lock(&sdata->local->iflist_mtx);
1121 ieee80211_recalc_ps(sdata->local, -1);
1122 mutex_unlock(&sdata->local->iflist_mtx);
1123
1124 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1125 return;
1126
1127 /*
1128 * We've received a probe response, but are not sure whether
1129 * we have or will be receiving any beacons or data, so let's
1130 * schedule the timers again, just in case.
1131 */
1132 ieee80211_sta_reset_beacon_monitor(sdata);
1133
1134 mod_timer(&ifmgd->conn_mon_timer,
1135 round_jiffies_up(jiffies +
1136 IEEE80211_CONNECTION_IDLE_TIME));
1137}
1138
1139void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1140 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1141{
75706d0e 1142 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1143 return;
1144
04ac3c0e
FF		 1145 if (ack)
1146 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1147
1148 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1149 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1150 if (ack)
1151 sdata->u.mgd.probe_send_count = 0;
1152 else
1153 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1154 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1155 }
1156}
1157
a43abf29
ML		 1158static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1159{
1160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1161 const u8 *ssid;
f01a067d 1162 u8 *dst = ifmgd->associated->bssid;
180205bd 1163 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1164
1165 /*
1166 * Try sending broadcast probe requests for the last three
1167 * probe requests after the first ones failed since some
1168 * buggy APs only support broadcast probe requests.
1169 */
1170 if (ifmgd->probe_send_count >= unicast_limit)
1171 dst = NULL;
a43abf29 1172
4e5ff376
FF		 1173 /*
1174 * When the hardware reports an accurate Tx ACK status, it's
1175 * better to send a nullfunc frame instead of a probe request,
1176 * as it will kick us off the AP quickly if we aren't associated
1177 * anymore. The timeout will be reset if the frame is ACKed by
1178 * the AP.
1179 */
04ac3c0e
FF		 1180 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1181 ifmgd->nullfunc_failed = false;
4e5ff376 1182 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1183 } else {
4e5ff376
FF		 1184 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1185 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
1186 }
a43abf29
ML		 1187
1188 ifmgd->probe_send_count++;
180205bd 1189 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1190 run_again(ifmgd, ifmgd->probe_timeout);
1191}
1192
b291ba11
JB		 1193static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1194 bool beacon)
04de8381 1195{
04de8381 1196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1197 bool already = false;
34bfc411 1198
9607e6b6 1199 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1200 return;
1201
91a3bd76
LR		 1202 if (sdata->local->scanning)
1203 return;
1204
b8bc4b0a
JB		 1205 if (sdata->local->tmp_channel)
1206 return;
1207
77fdaa12
JB		 1208 mutex_lock(&ifmgd->mtx);
1209
1210 if (!ifmgd->associated)
1211 goto out;
1212
a860402d 1213#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1214 if (beacon && net_ratelimit())
1215 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1216 "- sending probe request\n", sdata->name);
a860402d 1217#endif
04de8381 1218
b291ba11
JB		 1219 /*
1220 * The driver/our work has already reported this event or the
1221 * connection monitoring has kicked in and we have already sent
1222 * a probe request. Or maybe the AP died and the driver keeps
1223 * reporting until we disassociate...
1224 *
1225 * In either case we have to ignore the current call to this
1226 * function (except for setting the correct probe reason bit)
1227 * because otherwise we would reset the timer every time and
1228 * never check whether we received a probe response!
1229 */
1230 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1231 IEEE80211_STA_CONNECTION_POLL))
1232 already = true;
1233
1234 if (beacon)
1235 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1236 else
1237 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1238
1239 if (already)
1240 goto out;
1241
4e751843
JB		 1242 mutex_lock(&sdata->local->iflist_mtx);
1243 ieee80211_recalc_ps(sdata->local, -1);
1244 mutex_unlock(&sdata->local->iflist_mtx);
1245
a43abf29
ML		 1246 ifmgd->probe_send_count = 0;
1247 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1248 out:
1249 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1250}
1251
a619a4c0
JO		 1252struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1253 struct ieee80211_vif *vif)
1254{
1255 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1257 struct sk_buff *skb;
1258 const u8 *ssid;
1259
1260 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1261 return NULL;
1262
1263 ASSERT_MGD_MTX(ifmgd);
1264
1265 if (!ifmgd->associated)
1266 return NULL;
1267
1268 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1269 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1270 ssid + 2, ssid[1], NULL, 0);
1271
1272 return skb;
1273}
1274EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1275
1e4dcd01
JO		 1276static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1277{
1278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1279 struct ieee80211_local *local = sdata->local;
1280 u8 bssid[ETH_ALEN];
1281
1282 mutex_lock(&ifmgd->mtx);
1283 if (!ifmgd->associated) {
1284 mutex_unlock(&ifmgd->mtx);
1285 return;
1286 }
1287
1288 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1289
180205bd
BG		 1290 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1291 sdata->name, bssid);
1e4dcd01 1292
53f73c09 1293 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1294 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1295
1296 mutex_lock(&local->mtx);
1297 ieee80211_recalc_idle(local);
1298 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1299 /*
1300 * must be outside lock due to cfg80211,
1301 * but that's not a problem.
1302 */
1303 ieee80211_send_deauth_disassoc(sdata, bssid,
1304 IEEE80211_STYPE_DEAUTH,
1305 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1306 NULL, true);
1e4dcd01
JO		 1307}
1308
1309void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1310{
1311 struct ieee80211_sub_if_data *sdata =
1312 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1313 u.mgd.beacon_connection_loss_work);
b291ba11 1314
1e4dcd01
JO		 1315 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1316 __ieee80211_connection_loss(sdata);
1317 else
1318 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1319}
1320
04de8381
KV		 1321void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1322{
1323 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1324 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1325
b5878a2d
JB		 1326 trace_api_beacon_loss(sdata);
1327
1e4dcd01
JO		 1328 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1329 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1330}
1331EXPORT_SYMBOL(ieee80211_beacon_loss);
1332
1e4dcd01
JO		 1333void ieee80211_connection_loss(struct ieee80211_vif *vif)
1334{
1335 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1336 struct ieee80211_hw *hw = &sdata->local->hw;
1337
b5878a2d
JB		 1338 trace_api_connection_loss(sdata);
1339
1e4dcd01
JO		 1340 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1341 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1342}
1343EXPORT_SYMBOL(ieee80211_connection_loss);
1344
1345
77fdaa12
JB		 1346static enum rx_mgmt_action __must_check
1347ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1348 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1349{
46900298 1350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1351 const u8 *bssid = NULL;
f0706e82
JB		 1352 u16 reason_code;
1353
f4ea83dd 1354 if (len < 24 + 2)
77fdaa12 1355 return RX_MGMT_NONE;
f0706e82 1356
77fdaa12
JB		 1357 ASSERT_MGD_MTX(ifmgd);
1358
0c1ad2ca 1359 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1360
1361 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1362
77fdaa12 1363 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1364 sdata->name, bssid, reason_code);
77fdaa12 1365
53f73c09 1366 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1367 mutex_lock(&sdata->local->mtx);
63f170e0 1368 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1369 mutex_unlock(&sdata->local->mtx);
f0706e82 1370
77fdaa12 1371 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1372}
1373
1374
77fdaa12
JB		 1375static enum rx_mgmt_action __must_check
1376ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1377 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1378{
46900298 1379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1380 u16 reason_code;
1381
f4ea83dd 1382 if (len < 24 + 2)
77fdaa12 1383 return RX_MGMT_NONE;
f0706e82 1384
77fdaa12
JB		 1385 ASSERT_MGD_MTX(ifmgd);
1386
1387 if (WARN_ON(!ifmgd->associated))
1388 return RX_MGMT_NONE;
1389
0c1ad2ca 1390 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1391 return RX_MGMT_NONE;
f0706e82
JB		 1392
1393 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1394
0ff71613 1395 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1396 sdata->name, mgmt->sa, reason_code);
f0706e82 1397
53f73c09 1398 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1399 mutex_lock(&sdata->local->mtx);
bc83b681 1400 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1401 mutex_unlock(&sdata->local->mtx);
77fdaa12 1402 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1403}
1404
1405
af6b6374
JB		 1406static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1407 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1408{
af6b6374 1409 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1411 struct ieee80211_local *local = sdata->local;
8318d78a 1412 struct ieee80211_supported_band *sband;
f0706e82 1413 struct sta_info *sta;
0c1ad2ca 1414 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1415 u8 *pos;
881d948c 1416 u32 rates, basic_rates;
af6b6374 1417 u16 capab_info, aid;
f0706e82 1418 struct ieee802_11_elems elems;
bda3933a 1419 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1420 u32 changed = 0;
5d1ec85f
JB		 1421 int i, j, err;
1422 bool have_higher_than_11mbit = false;
ae5eb026 1423 u16 ap_ht_cap_flags;
f0706e82 1424
af6b6374 1425 /* AssocResp and ReassocResp have identical structure */
f0706e82 1426
f0706e82 1427 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1428 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1429
1dd84aa2
JB		 1430 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1431 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1432 "set\n", sdata->name, aid);
1dd84aa2
JB		 1433 aid &= ~(BIT(15) | BIT(14));
1434
af6b6374
JB		 1435 pos = mgmt->u.assoc_resp.variable;
1436 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1437
f0706e82
JB		 1438 if (!elems.supp_rates) {
1439 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1440 sdata->name);
af6b6374 1441 return false;
f0706e82
JB		 1442 }
1443
46900298 1444 ifmgd->aid = aid;
f0706e82 1445
0c1ad2ca 1446 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1447 if (!sta) {
5d1ec85f
JB		 1448 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1449 " the AP\n", sdata->name);
af6b6374 1450 return false;
77fdaa12 1451 }
05e5e883 1452
5d1ec85f
JB		 1453 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1454 WLAN_STA_ASSOC_AP);
1455 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1456 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1457
60f8b39c
JB		 1458 rates = 0;
1459 basic_rates = 0;
e7480bbb 1460 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1461
60f8b39c
JB		 1462 for (i = 0; i < elems.supp_rates_len; i++) {
1463 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1464 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1465
60f8b39c
JB		 1466 if (rate > 110)
1467 have_higher_than_11mbit = true;
1468
1469 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1470 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1471 rates |= BIT(j);
d61272cb
TW		 1472 if (is_basic)
1473 basic_rates |= BIT(j);
1474 break;
1475 }
f709fc69 1476 }
f709fc69
LCC		 1477 }
1478
60f8b39c
JB		 1479 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1480 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1481 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1482
60f8b39c
JB		 1483 if (rate > 110)
1484 have_higher_than_11mbit = true;
f0706e82 1485
60f8b39c 1486 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1487 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1488 rates |= BIT(j);
d61272cb
TW		 1489 if (is_basic)
1490 basic_rates |= BIT(j);
1491 break;
1492 }
60f8b39c 1493 }
1ebebea8 1494 }
f0706e82 1495
e7480bbb 1496 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1497 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1498
1499 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1500 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1501 have_higher_than_11mbit)
1502 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1503 else
1504 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1505
ab1faead 1506 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1507 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1508 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1509
1510 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1511
4b7679a5 1512 rate_control_rate_init(sta);
f0706e82 1513
46900298 1514 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1515 set_sta_flags(sta, WLAN_STA_MFP);
1516
ddf4ac53 1517 if (elems.wmm_param)
60f8b39c 1518 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1519
5d1ec85f
JB		 1520 err = sta_info_insert(sta);
1521 sta = NULL;
1522 if (err) {
1523 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1524 " the AP (error %d)\n", sdata->name, err);
90be561b 1525 return false;
ddf4ac53
JB		 1526 }
1527
f2176d72
JO		 1528 /*
1529 * Always handle WMM once after association regardless
1530 * of the first value the AP uses. Setting -1 here has
1531 * that effect because the AP values is an unsigned
1532 * 4-bit value.
1533 */
1534 ifmgd->wmm_last_param_set = -1;
1535
ddf4ac53 1536 if (elems.wmm_param)
4ced3f74 1537 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1538 elems.wmm_param_len);
aa837e1d
JB		 1539 else
1540 ieee80211_set_wmm_default(sdata);
f0706e82 1541
e4da8c37
JB		 1542 local->oper_channel = wk->chan;
1543
ae5eb026 1544 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1545 (sdata->local->hw.queues >= 4) &&
ab1faead 1546 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1547 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1548 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1549
60f8b39c
JB		 1550 /* set AID and assoc capability,
1551 * ieee80211_set_associated() will tell the driver */
1552 bss_conf->aid = aid;
1553 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1554 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1555
d524215f
FF		 1556 /*
1557 * If we're using 4-addr mode, let the AP know that we're
1558 * doing so, so that it can create the STA VLAN on its side
1559 */
1560 if (ifmgd->use_4addr)
1561 ieee80211_send_4addr_nullfunc(local, sdata);
1562
15b7b062 1563 /*
b291ba11
JB		 1564 * Start timer to probe the connection to the AP now.
1565 * Also start the timer that will detect beacon loss.
15b7b062 1566 */
b291ba11 1567 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1568 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1569
af6b6374 1570 return true;
f0706e82
JB		 1571}
1572
1573
98c8fccf
JB		 1574static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1575 struct ieee80211_mgmt *mgmt,
1576 size_t len,
1577 struct ieee80211_rx_status *rx_status,
1578 struct ieee802_11_elems *elems,
1579 bool beacon)
1580{
1581 struct ieee80211_local *local = sdata->local;
1582 int freq;
c2b13452 1583 struct ieee80211_bss *bss;
98c8fccf 1584 struct ieee80211_channel *channel;
56007a02
JB		 1585 bool need_ps = false;
1586
1587 if (sdata->u.mgd.associated) {
1588 bss = (void *)sdata->u.mgd.associated->priv;
1589 /* not previously set so we may need to recalc */
1590 need_ps = !bss->dtim_period;
1591 }
98c8fccf
JB		 1592
1593 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1594 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1595 rx_status->band);
98c8fccf
JB		 1596 else
1597 freq = rx_status->freq;
1598
1599 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1600
1601 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1602 return;
1603
98c8fccf 1604 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1605 channel, beacon);
77fdaa12
JB		 1606 if (bss)
1607 ieee80211_rx_bss_put(local, bss);
1608
1609 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1610 return;
1611
56007a02
JB		 1612 if (need_ps) {
1613 mutex_lock(&local->iflist_mtx);
1614 ieee80211_recalc_ps(local, -1);
1615 mutex_unlock(&local->iflist_mtx);
1616 }
1617
c481ec97 1618 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1619 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1620 ETH_ALEN) == 0)) {
c481ec97
S		 1621 struct ieee80211_channel_sw_ie *sw_elem =
1622 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1623 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1624 bss, rx_status->mactime);
c481ec97 1625 }
f0706e82
JB		 1626}
1627
1628
f698d856 1629static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1630 struct sk_buff *skb)
f0706e82 1631{
af6b6374 1632 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1633 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1634 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1635 size_t baselen, len = skb->len;
ae6a44e3
EK		 1636 struct ieee802_11_elems elems;
1637
15b7b062
KV		 1638 ifmgd = &sdata->u.mgd;
1639
77fdaa12
JB		 1640 ASSERT_MGD_MTX(ifmgd);
1641
47846c9b 1642 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1643 return; /* ignore ProbeResp to foreign address */
1644
ae6a44e3
EK		 1645 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1646 if (baselen > len)
1647 return;
1648
1649 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1650 &elems);
1651
98c8fccf 1652 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1653
77fdaa12 1654 if (ifmgd->associated &&
4e5ff376
FF		 1655 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1656 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1657}
1658
d91f36db
JB		 1659/*
1660 * This is the canonical list of information elements we care about,
1661 * the filter code also gives us all changes to the Microsoft OUI
1662 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1663 *
1664 * We implement beacon filtering in software since that means we can
1665 * avoid processing the frame here and in cfg80211, and userspace
1666 * will not be able to tell whether the hardware supports it or not.
1667 *
1668 * XXX: This list needs to be dynamic -- userspace needs to be able to
1669 * add items it requires. It also needs to be able to tell us to
1670 * look out for other vendor IEs.
1671 */
1672static const u64 care_about_ies =
1d4df3a5
JB		 1673 (1ULL << WLAN_EID_COUNTRY) |
1674 (1ULL << WLAN_EID_ERP_INFO) |
1675 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1676 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1677 (1ULL << WLAN_EID_HT_CAPABILITY) |
1678 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1679
f698d856 1680static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1681 struct ieee80211_mgmt *mgmt,
1682 size_t len,
1683 struct ieee80211_rx_status *rx_status)
1684{
d91f36db 1685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1686 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1687 size_t baselen;
1688 struct ieee802_11_elems elems;
f698d856 1689 struct ieee80211_local *local = sdata->local;
471b3efd 1690 u32 changed = 0;
d91f36db 1691 bool erp_valid, directed_tim = false;
7a5158ef 1692 u8 erp_value = 0;
d91f36db 1693 u32 ncrc;
77fdaa12
JB		 1694 u8 *bssid;
1695
1696 ASSERT_MGD_MTX(ifmgd);
f0706e82 1697
ae6a44e3
EK		 1698 /* Process beacon from the current BSS */
1699 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1700 if (baselen > len)
1701 return;
1702
d91f36db 1703 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1704 return;
f0706e82 1705
b291ba11
JB		 1706 /*
1707 * We might have received a number of frames, among them a
1708 * disassoc frame and a beacon...
1709 */
1710 if (!ifmgd->associated)
77fdaa12
JB		 1711 return;
1712
0c1ad2ca 1713 bssid = ifmgd->associated->bssid;
77fdaa12 1714
b291ba11
JB		 1715 /*
1716 * And in theory even frames from a different AP we were just
1717 * associated to a split-second ago!
1718 */
1719 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1720 return;
1721
17e4ec14
JM		 1722 /* Track average RSSI from the Beacon frames of the current AP */
1723 ifmgd->last_beacon_signal = rx_status->signal;
1724 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1725 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1726 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1727 ifmgd->last_cqm_event_signal = 0;
391a200a 1728 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1729 } else {
1730 ifmgd->ave_beacon_signal =
1731 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1732 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1733 ifmgd->ave_beacon_signal) / 16;
391a200a 1734 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1735 }
1736 if (bss_conf->cqm_rssi_thold &&
391a200a 1737 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1738 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1739 int sig = ifmgd->ave_beacon_signal / 16;
1740 int last_event = ifmgd->last_cqm_event_signal;
1741 int thold = bss_conf->cqm_rssi_thold;
1742 int hyst = bss_conf->cqm_rssi_hyst;
1743 if (sig < thold &&
1744 (last_event == 0 || sig < last_event - hyst)) {
1745 ifmgd->last_cqm_event_signal = sig;
1746 ieee80211_cqm_rssi_notify(
1747 &sdata->vif,
1748 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1749 GFP_KERNEL);
1750 } else if (sig > thold &&
1751 (last_event == 0 || sig > last_event + hyst)) {
1752 ifmgd->last_cqm_event_signal = sig;
1753 ieee80211_cqm_rssi_notify(
1754 &sdata->vif,
1755 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1756 GFP_KERNEL);
1757 }
1758 }
1759
b291ba11 1760 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1761#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1762 if (net_ratelimit()) {
1763 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1764 "to a received beacon\n", sdata->name);
92778180
JM		 1765 }
1766#endif
b291ba11 1767 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1768 mutex_lock(&local->iflist_mtx);
1769 ieee80211_recalc_ps(local, -1);
1770 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1771 }
1772
b291ba11
JB		 1773 /*
1774 * Push the beacon loss detection into the future since
1775 * we are processing a beacon from the AP just now.
1776 */
d3a910a8 1777 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1778
d91f36db
JB		 1779 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1780 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1781 len - baselen, &elems,
1782 care_about_ies, ncrc);
1783
1784 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1785 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1786 ifmgd->aid);
d91f36db 1787
d8ec4433 1788 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1789 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1790 true);
d91f36db 1791
4ced3f74 1792 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1793 elems.wmm_param_len);
1794 }
fe3fa827 1795
25c9c875 1796 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1797 if (directed_tim) {
572e0012
KV		 1798 if (local->hw.conf.dynamic_ps_timeout > 0) {
1799 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1800 ieee80211_hw_config(local,
1801 IEEE80211_CONF_CHANGE_PS);
1802 ieee80211_send_nullfunc(local, sdata, 0);
1803 } else {
1804 local->pspolling = true;
1805
1806 /*
1807 * Here is assumed that the driver will be
1808 * able to send ps-poll frame and receive a
1809 * response even though power save mode is
1810 * enabled, but some drivers might require
1811 * to disable power save here. This needs
1812 * to be investigated.
1813 */
1814 ieee80211_send_pspoll(local, sdata);
1815 }
a97b77b9
VN		 1816 }
1817 }
7a5158ef 1818
d8ec4433 1819 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1820 return;
1821 ifmgd->beacon_crc = ncrc;
d8ec4433 1822 ifmgd->beacon_crc_valid = true;
30196673 1823
7a5158ef
JB		 1824 if (elems.erp_info && elems.erp_info_len >= 1) {
1825 erp_valid = true;
1826 erp_value = elems.erp_info[0];
1827 } else {
1828 erp_valid = false;
50c4afb9 1829 }
7a5158ef
JB		 1830 changed |= ieee80211_handle_bss_capability(sdata,
1831 le16_to_cpu(mgmt->u.beacon.capab_info),
1832 erp_valid, erp_value);
f0706e82 1833
d3c990fb 1834
53d6f81c 1835 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1836 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1837 struct sta_info *sta;
1838 struct ieee80211_supported_band *sband;
1839 u16 ap_ht_cap_flags;
1840
1841 rcu_read_lock();
1842
abe60632 1843 sta = sta_info_get(sdata, bssid);
77fdaa12 1844 if (WARN_ON(!sta)) {
ae5eb026
JB		 1845 rcu_read_unlock();
1846 return;
1847 }
1848
1849 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1850
1851 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1852 elems.ht_cap_elem, &sta->sta.ht_cap);
1853
1854 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1855
1856 rcu_read_unlock();
1857
1858 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1859 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1860 }
1861
8b19e6ca 1862 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1863 if (elems.country_elem) {
a8302de9
VT		 1864 /* TODO: IBSS also needs this */
1865 if (elems.pwr_constr_elem)
1866 ieee80211_handle_pwr_constr(sdata,
1867 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1868 elems.pwr_constr_elem,
1869 elems.pwr_constr_elem_len);
3f2355cb
LR		 1870 }
1871
471b3efd 1872 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1873}
1874
1fa57d01
JB		 1875void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1876 struct sk_buff *skb)
f0706e82 1877{
77fdaa12 1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1879 struct ieee80211_rx_status *rx_status;
f0706e82 1880 struct ieee80211_mgmt *mgmt;
77fdaa12 1881 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1882 u16 fc;
1883
f0706e82
JB		 1884 rx_status = (struct ieee80211_rx_status *) skb->cb;
1885 mgmt = (struct ieee80211_mgmt *) skb->data;
1886 fc = le16_to_cpu(mgmt->frame_control);
1887
77fdaa12
JB		 1888 mutex_lock(&ifmgd->mtx);
1889
1890 if (ifmgd->associated &&
0c1ad2ca 1891 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1892 switch (fc & IEEE80211_FCTL_STYPE) {
1893 case IEEE80211_STYPE_BEACON:
1894 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1895 rx_status);
1896 break;
1897 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1898 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1899 break;
1900 case IEEE80211_STYPE_DEAUTH:
63f170e0 1901 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1902 break;
1903 case IEEE80211_STYPE_DISASSOC:
1904 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1905 break;
1906 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1907 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1908 case WLAN_CATEGORY_SPECTRUM_MGMT:
1909 ieee80211_sta_process_chanswitch(sdata,
1910 &mgmt->u.action.u.chan_switch.sw_elem,
1911 (void *)ifmgd->associated->priv,
1912 rx_status->mactime);
1913 break;
1914 }
77fdaa12
JB		 1915 }
1916 mutex_unlock(&ifmgd->mtx);
1917
1918 switch (rma) {
1919 case RX_MGMT_NONE:
1920 /* no action */
1921 break;
1922 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1923 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1924 break;
1925 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1926 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1927 break;
1928 default:
1929 WARN(1, "unexpected: %d", rma);
1930 }
36b3a628 1931 return;
77fdaa12
JB		 1932 }
1933
77fdaa12
JB		 1934 mutex_unlock(&ifmgd->mtx);
1935
63f170e0 1936 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1937 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1938 struct ieee80211_local *local = sdata->local;
1939 struct ieee80211_work *wk;
1940
a1699b75 1941 mutex_lock(&local->mtx);
b054b747
JB		 1942 list_for_each_entry(wk, &local->work_list, list) {
1943 if (wk->sdata != sdata)
1944 continue;
1945
e5b900d2
JB		 1946 if (wk->type != IEEE80211_WORK_ASSOC &&
1947 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1948 continue;
1949
1950 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1951 continue;
1952 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1953 continue;
1954
1955 /*
1956 * Printing the message only here means we can't
1957 * spuriously print it, but it also means that it
1958 * won't be printed when the frame comes in before
1959 * we even tried to associate or in similar cases.
1960 *
1961 * Ultimately, I suspect cfg80211 should print the
1962 * messages instead.
1963 */
1964 printk(KERN_DEBUG
1965 "%s: deauthenticated from %pM (Reason: %u)\n",
1966 sdata->name, mgmt->bssid,
1967 le16_to_cpu(mgmt->u.deauth.reason_code));
1968
1969 list_del_rcu(&wk->list);
1970 free_work(wk);
1971 break;
1972 }
a1699b75 1973 mutex_unlock(&local->mtx);
f0706e82 1974
ce470613 1975 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1976 }
f0706e82
JB		 1977}
1978
9c6bd790 1979static void ieee80211_sta_timer(unsigned long data)
f0706e82 1980{
60f8b39c
JB		 1981 struct ieee80211_sub_if_data *sdata =
1982 (struct ieee80211_sub_if_data *) data;
46900298 1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1984 struct ieee80211_local *local = sdata->local;
f0706e82 1985
5bb644a0
JB		 1986 if (local->quiescing) {
1987 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1988 return;
1989 }
1990
64592c8f 1991 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1992}
1993
04ac3c0e
FF		 1994static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1995 u8 *bssid)
1996{
1997 struct ieee80211_local *local = sdata->local;
1998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1999
2000 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2001 IEEE80211_STA_BEACON_POLL);
2002
2003 ieee80211_set_disassoc(sdata, true, true);
2004 mutex_unlock(&ifmgd->mtx);
2005 mutex_lock(&local->mtx);
2006 ieee80211_recalc_idle(local);
2007 mutex_unlock(&local->mtx);
2008 /*
2009 * must be outside lock due to cfg80211,
2010 * but that's not a problem.
2011 */
2012 ieee80211_send_deauth_disassoc(sdata, bssid,
2013 IEEE80211_STYPE_DEAUTH,
2014 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2015 NULL, true);
2016 mutex_lock(&ifmgd->mtx);
2017}
2018
1fa57d01 2019void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2020{
9c6bd790 2021 struct ieee80211_local *local = sdata->local;
1fa57d01 2022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2023
77fdaa12
JB		 2024 /* then process the rest of the work */
2025 mutex_lock(&ifmgd->mtx);
2026
b291ba11
JB		 2027 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2028 IEEE80211_STA_CONNECTION_POLL) &&
2029 ifmgd->associated) {
a43abf29 2030 u8 bssid[ETH_ALEN];
72a8a3ed 2031 int max_tries;
a43abf29 2032
0c1ad2ca 2033 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2034
72a8a3ed 2035 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2036 max_tries = max_nullfunc_tries;
72a8a3ed 2037 else
180205bd 2038 max_tries = max_probe_tries;
72a8a3ed 2039
4e5ff376
FF		 2040 /* ACK received for nullfunc probing frame */
2041 if (!ifmgd->probe_send_count)
2042 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2043 else if (ifmgd->nullfunc_failed) {
2044 if (ifmgd->probe_send_count < max_tries) {
2045#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2046 wiphy_debug(local->hw.wiphy,
2047 "%s: No ack for nullfunc frame to"
bfc31df3 2048 " AP %pM, try %d/%i\n",
04ac3c0e 2049 sdata->name, bssid,
bfc31df3 2050 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2051#endif
2052 ieee80211_mgd_probe_ap_send(sdata);
2053 } else {
2054#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2055 wiphy_debug(local->hw.wiphy,
2056 "%s: No ack for nullfunc frame to"
2057 " AP %pM, disconnecting.\n",
c658e5db 2058 sdata->name, bssid);
04ac3c0e
FF		 2059#endif
2060 ieee80211_sta_connection_lost(sdata, bssid);
2061 }
2062 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2063 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2064 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2065#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2066 wiphy_debug(local->hw.wiphy,
2067 "%s: Failed to send nullfunc to AP %pM"
2068 " after %dms, disconnecting.\n",
2069 sdata->name,
180205bd 2070 bssid, probe_wait_ms);
04ac3c0e
FF		 2071#endif
2072 ieee80211_sta_connection_lost(sdata, bssid);
2073 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2074#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2075 wiphy_debug(local->hw.wiphy,
2076 "%s: No probe response from AP %pM"
bfc31df3 2077 " after %dms, try %d/%i\n",
b38afa87 2078 sdata->name,
180205bd 2079 bssid, probe_wait_ms,
bfc31df3 2080 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2081#endif
2082 ieee80211_mgd_probe_ap_send(sdata);
2083 } else {
b291ba11
JB		 2084 /*
2085 * We actually lost the connection ... or did we?
2086 * Let's make sure!
2087 */
b38afa87
BG		 2088 wiphy_debug(local->hw.wiphy,
2089 "%s: No probe response from AP %pM"
2090 " after %dms, disconnecting.\n",
2091 sdata->name,
180205bd 2092 bssid, probe_wait_ms);
04ac3c0e
FF		 2093
2094 ieee80211_sta_connection_lost(sdata, bssid);
b291ba11
JB		 2095 }
2096 }
2097
77fdaa12 2098 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2099}
2100
b291ba11
JB		 2101static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2102{
2103 struct ieee80211_sub_if_data *sdata =
2104 (struct ieee80211_sub_if_data *) data;
2105 struct ieee80211_local *local = sdata->local;
2106
2107 if (local->quiescing)
2108 return;
2109
1e4dcd01
JO		 2110 ieee80211_queue_work(&sdata->local->hw,
2111 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2112}
2113
2114static void ieee80211_sta_conn_mon_timer(unsigned long data)
2115{
2116 struct ieee80211_sub_if_data *sdata =
2117 (struct ieee80211_sub_if_data *) data;
2118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2119 struct ieee80211_local *local = sdata->local;
2120
2121 if (local->quiescing)
2122 return;
2123
42935eca 2124 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2125}
2126
2127static void ieee80211_sta_monitor_work(struct work_struct *work)
2128{
2129 struct ieee80211_sub_if_data *sdata =
2130 container_of(work, struct ieee80211_sub_if_data,
2131 u.mgd.monitor_work);
2132
2133 ieee80211_mgd_probe_ap(sdata, false);
2134}
2135
9c6bd790
JB		 2136static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2137{
ad935687 2138 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2139 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2140 IEEE80211_STA_CONNECTION_POLL);
ad935687 2141
b291ba11 2142 /* let's probe the connection once */
42935eca 2143 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2144 &sdata->u.mgd.monitor_work);
2145 /* and do all the other regular work too */
64592c8f 2146 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2147 }
9c6bd790 2148}
f0706e82 2149
5bb644a0
JB		 2150#ifdef CONFIG_PM
2151void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2152{
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154
2155 /*
2156 * we need to use atomic bitops for the running bits
2157 * only because both timers might fire at the same
2158 * time -- the code here is properly synchronised.
2159 */
2160
d1f5b7a3
JB		 2161 cancel_work_sync(&ifmgd->request_smps_work);
2162
1e4dcd01 2163 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2164 if (del_timer_sync(&ifmgd->timer))
2165 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2166
2167 cancel_work_sync(&ifmgd->chswitch_work);
2168 if (del_timer_sync(&ifmgd->chswitch_timer))
2169 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2170
2171 cancel_work_sync(&ifmgd->monitor_work);
2172 /* these will just be re-established on connection */
2173 del_timer_sync(&ifmgd->conn_mon_timer);
2174 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2175}
2176
2177void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2178{
2179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2180
2181 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2182 add_timer(&ifmgd->timer);
2183 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2184 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2185 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2186 ieee80211_restart_sta_timer(sdata);
5bb644a0
JB		 2187}
2188#endif
2189
9c6bd790
JB		 2190/* interface setup */
2191void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2192{
46900298 2193 struct ieee80211_if_managed *ifmgd;
988c0f72 2194
46900298 2195 ifmgd = &sdata->u.mgd;
b291ba11 2196 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2197 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2198 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2199 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2200 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2201 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2202 (unsigned long) sdata);
b291ba11
JB		 2203 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2204 (unsigned long) sdata);
2205 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2206 (unsigned long) sdata);
46900298 2207 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2208 (unsigned long) sdata);
9c6bd790 2209
ab1faead 2210 ifmgd->flags = 0;
bbbdff9e 2211
77fdaa12 2212 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2213
2214 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2215 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2216 else
2217 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2218}
2219
77fdaa12
JB		 2220/* scan finished notification */
2221void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2222{
77fdaa12 2223 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2224
77fdaa12
JB		 2225 /* Restart STA timers */
2226 rcu_read_lock();
2227 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2228 ieee80211_restart_sta_timer(sdata);
2229 rcu_read_unlock();
2230}
60f8b39c 2231
77fdaa12
JB		 2232int ieee80211_max_network_latency(struct notifier_block *nb,
2233 unsigned long data, void *dummy)
2234{
2235 s32 latency_usec = (s32) data;
2236 struct ieee80211_local *local =
2237 container_of(nb, struct ieee80211_local,
2238 network_latency_notifier);
1fa6f4af 2239
77fdaa12
JB		 2240 mutex_lock(&local->iflist_mtx);
2241 ieee80211_recalc_ps(local, latency_usec);
2242 mutex_unlock(&local->iflist_mtx);
dfe67012 2243
77fdaa12 2244 return 0;
9c6bd790
JB		 2245}
2246
77fdaa12 2247/* config hooks */
af6b6374
JB		 2248static enum work_done_result
2249ieee80211_probe_auth_done(struct ieee80211_work *wk,
2250 struct sk_buff *skb)
2251{
2252 if (!skb) {
2253 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2254 return WORK_DONE_DESTROY;
2255 }
2256
2257 if (wk->type == IEEE80211_WORK_AUTH) {
2258 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2259 return WORK_DONE_DESTROY;
2260 }
2261
2262 mutex_lock(&wk->sdata->u.mgd.mtx);
2263 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2264 mutex_unlock(&wk->sdata->u.mgd.mtx);
2265
2266 wk->type = IEEE80211_WORK_AUTH;
2267 wk->probe_auth.tries = 0;
2268 return WORK_DONE_REQUEUE;
2269}
2270
77fdaa12
JB		 2271int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2272 struct cfg80211_auth_request *req)
9c6bd790 2273{
77fdaa12 2274 const u8 *ssid;
f679f65d 2275 struct ieee80211_work *wk;
77fdaa12 2276 u16 auth_alg;
9c6bd790 2277
d5cdfacb
JM		 2278 if (req->local_state_change)
2279 return 0; /* no need to update mac80211 state */
2280
77fdaa12
JB		 2281 switch (req->auth_type) {
2282 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2283 auth_alg = WLAN_AUTH_OPEN;
2284 break;
2285 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2286 if (IS_ERR(sdata->local->wep_tx_tfm))
2287 return -EOPNOTSUPP;
77fdaa12
JB		 2288 auth_alg = WLAN_AUTH_SHARED_KEY;
2289 break;
2290 case NL80211_AUTHTYPE_FT:
2291 auth_alg = WLAN_AUTH_FT;
2292 break;
2293 case NL80211_AUTHTYPE_NETWORK_EAP:
2294 auth_alg = WLAN_AUTH_LEAP;
2295 break;
2296 default:
2297 return -EOPNOTSUPP;
60f8b39c 2298 }
77fdaa12
JB		 2299
2300 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2301 if (!wk)
9c6bd790 2302 return -ENOMEM;
77fdaa12 2303
5e124bd5 2304 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2305
2306 if (req->ie && req->ie_len) {
2307 memcpy(wk->ie, req->ie, req->ie_len);
2308 wk->ie_len = req->ie_len;
9c6bd790 2309 }
77fdaa12 2310
fffd0934 2311 if (req->key && req->key_len) {
af6b6374
JB		 2312 wk->probe_auth.key_len = req->key_len;
2313 wk->probe_auth.key_idx = req->key_idx;
2314 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2315 }
2316
77fdaa12 2317 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2318 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2319 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2320
af6b6374
JB		 2321 wk->probe_auth.algorithm = auth_alg;
2322 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2323
070bb547
JB		 2324 /* if we already have a probe, don't probe again */
2325 if (req->bss->proberesp_ies)
2326 wk->type = IEEE80211_WORK_AUTH;
2327 else
2328 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2329 wk->chan = req->bss->channel;
4d51e149 2330 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2331 wk->sdata = sdata;
2332 wk->done = ieee80211_probe_auth_done;
77fdaa12 2333
af6b6374 2334 ieee80211_add_work(wk);
9c6bd790 2335 return 0;
60f8b39c
JB		 2336}
2337
af6b6374
JB		 2338static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2339 struct sk_buff *skb)
2340{
2341 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2342 struct ieee80211_rx_status *rx_status;
2343 struct ieee802_11_elems elems;
af6b6374
JB		 2344 u16 status;
2345
2346 if (!skb) {
2347 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2348 return WORK_DONE_DESTROY;
2349 }
2350
e5b900d2
JB		 2351 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2352 mutex_lock(&wk->sdata->u.mgd.mtx);
2353 rx_status = (void *) skb->cb;
2354 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2355 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2356 &elems, true);
2357 mutex_unlock(&wk->sdata->u.mgd.mtx);
2358
2359 wk->type = IEEE80211_WORK_ASSOC;
2360 /* not really done yet */
2361 return WORK_DONE_REQUEUE;
2362 }
2363
af6b6374
JB		 2364 mgmt = (void *)skb->data;
2365 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2366
2367 if (status == WLAN_STATUS_SUCCESS) {
2368 mutex_lock(&wk->sdata->u.mgd.mtx);
2369 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2370 mutex_unlock(&wk->sdata->u.mgd.mtx);
2371 /* oops -- internal error -- send timeout for now */
2372 cfg80211_send_assoc_timeout(wk->sdata->dev,
2373 wk->filter_ta);
2374 return WORK_DONE_DESTROY;
2375 }
68542962
JO		 2376
2377 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2378 }
2379
2380 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2381 return WORK_DONE_DESTROY;
2382}
2383
77fdaa12
JB		 2384int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2385 struct cfg80211_assoc_request *req)
f0706e82 2386{
77fdaa12 2387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2388 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2389 struct ieee80211_work *wk;
63f170e0 2390 const u8 *ssid;
af6b6374 2391 int i;
f0706e82 2392
77fdaa12 2393 mutex_lock(&ifmgd->mtx);
af6b6374 2394 if (ifmgd->associated) {
9c87ba67
JM		 2395 if (!req->prev_bssid ||
2396 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2397 ETH_ALEN)) {
2398 /*
2399 * We are already associated and the request was not a
2400 * reassociation request from the current BSS, so
2401 * reject it.
2402 */
2403 mutex_unlock(&ifmgd->mtx);
2404 return -EALREADY;
2405 }
2406
2407 /* Trying to reassociate - clear previous association state */
53f73c09 2408 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2409 }
2410 mutex_unlock(&ifmgd->mtx);
77fdaa12 2411
63f170e0 2412 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2413 if (!wk)
2414 return -ENOMEM;
77fdaa12 2415
77fdaa12 2416 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2417 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2418
d8ec4433
JO		 2419 ifmgd->beacon_crc_valid = false;
2420
77fdaa12
JB		 2421 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2422 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2423 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2424 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2425 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2426
77fdaa12
JB		 2427
2428 if (req->ie && req->ie_len) {
2429 memcpy(wk->ie, req->ie, req->ie_len);
2430 wk->ie_len = req->ie_len;
2431 } else
2432 wk->ie_len = 0;
2433
0c1ad2ca 2434 wk->assoc.bss = req->bss;
f679f65d 2435
af6b6374 2436 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2437
af6b6374
JB		 2438 /* new association always uses requested smps mode */
2439 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2440 if (ifmgd->powersave)
2441 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2442 else
2443 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2444 } else
2445 ifmgd->ap_smps = ifmgd->req_smps;
2446
2447 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2448 /*
2449 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2450 * We still associate in non-HT mode (11a/b/g) if any one of these
2451 * ciphers is configured as pairwise.
2452 * We can set this to true for non-11n hardware, that'll be checked
2453 * separately along with the peer capabilities.
2454 */
af6b6374 2455 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2456 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2457 wk->assoc.wmm_used = bss->wmm_used;
2458 wk->assoc.supp_rates = bss->supp_rates;
2459 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2460 wk->assoc.ht_information_ie =
2461 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2462
ab13315a
KV		 2463 if (bss->wmm_used && bss->uapsd_supported &&
2464 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2465 wk->assoc.uapsd_used = true;
2466 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2467 } else {
2468 wk->assoc.uapsd_used = false;
2469 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2470 }
2471
63f170e0 2472 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2473 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2474 wk->assoc.ssid_len = ssid[1];
63f170e0 2475
77fdaa12 2476 if (req->prev_bssid)
f679f65d 2477 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2478
f679f65d 2479 wk->chan = req->bss->channel;
4d51e149 2480 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2481 wk->sdata = sdata;
2482 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2483 if (!bss->dtim_period &&
2484 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2485 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2486 else
2487 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2488
2489 if (req->use_mfp) {
2490 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2491 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2492 } else {
2493 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2494 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2495 }
2496
2497 if (req->crypto.control_port)
2498 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2499 else
2500 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2501
a621fa4d
JB		 2502 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2503 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2504
af6b6374
JB		 2505 ieee80211_add_work(wk);
2506 return 0;
f0706e82
JB		 2507}
2508
77fdaa12 2509int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2510 struct cfg80211_deauth_request *req,
2511 void *cookie)
f0706e82 2512{
af6b6374 2513 struct ieee80211_local *local = sdata->local;
46900298 2514 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2515 struct ieee80211_work *wk;
05e48e8e
JM		 2516 u8 bssid[ETH_ALEN];
2517 bool assoc_bss = false;
f0706e82 2518
77fdaa12
JB		 2519 mutex_lock(&ifmgd->mtx);
2520
05e48e8e 2521 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2522 if (ifmgd->associated == req->bss) {
53f73c09 2523 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2524 mutex_unlock(&ifmgd->mtx);
05e48e8e 2525 assoc_bss = true;
af6b6374
JB		 2526 } else {
2527 bool not_auth_yet = false;
f0706e82 2528
a58ce43f 2529 mutex_unlock(&ifmgd->mtx);
a58ce43f 2530
a1699b75 2531 mutex_lock(&local->mtx);
af6b6374 2532 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2533 if (wk->sdata != sdata)
af6b6374 2534 continue;
29165e4c
JB		 2535
2536 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2537 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2538 wk->type != IEEE80211_WORK_ASSOC &&
2539 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2540 continue;
2541
af6b6374
JB		 2542 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2543 continue;
29165e4c
JB		 2544
2545 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2546 list_del_rcu(&wk->list);
af6b6374
JB		 2547 free_work(wk);
2548 break;
2549 }
a1699b75 2550 mutex_unlock(&local->mtx);
af6b6374
JB		 2551
2552 /*
2553 * If somebody requests authentication and we haven't
2554 * sent out an auth frame yet there's no need to send
2555 * out a deauth frame either. If the state was PROBE,
2556 * then this is the case. If it's AUTH we have sent a
2557 * frame, and if it's IDLE we have completed the auth
2558 * process already.
2559 */
2560 if (not_auth_yet) {
2561 __cfg80211_auth_canceled(sdata->dev, bssid);
2562 return 0;
2563 }
2564 }
77fdaa12 2565
0ff71613 2566 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2567 sdata->name, bssid, req->reason_code);
0ff71613 2568
d5cdfacb
JM		 2569 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2570 req->reason_code, cookie,
2571 !req->local_state_change);
05e48e8e
JM		 2572 if (assoc_bss)
2573 sta_info_destroy_addr(sdata, bssid);
f0706e82 2574
7da7cc1d 2575 mutex_lock(&sdata->local->mtx);
bc83b681 2576 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2577 mutex_unlock(&sdata->local->mtx);
bc83b681 2578
f0706e82
JB		 2579 return 0;
2580}
84363e6e 2581
77fdaa12 2582int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2583 struct cfg80211_disassoc_request *req,
2584 void *cookie)
9c6bd790 2585{
77fdaa12 2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2587 u8 bssid[ETH_ALEN];
9c6bd790 2588
77fdaa12 2589 mutex_lock(&ifmgd->mtx);
10f644a4 2590
8d8b261a
JB		 2591 /*
2592 * cfg80211 should catch this ... but it's racy since
2593 * we can receive a disassoc frame, process it, hand it
2594 * to cfg80211 while that's in a locked section already
2595 * trying to tell us that the user wants to disconnect.
2596 */
0c1ad2ca 2597 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2598 mutex_unlock(&ifmgd->mtx);
2599 return -ENOLINK;
2600 }
2601
0ff71613 2602 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2603 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2604
e69e95db 2605 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2606 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2607
2608 mutex_unlock(&ifmgd->mtx);
10f644a4 2609
77fdaa12 2610 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2611 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2612 cookie, !req->local_state_change);
e69e95db 2613 sta_info_destroy_addr(sdata, bssid);
bc83b681 2614
7da7cc1d 2615 mutex_lock(&sdata->local->mtx);
bc83b681 2616 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2617 mutex_unlock(&sdata->local->mtx);
bc83b681 2618
10f644a4
JB		 2619 return 0;
2620}
026331c4 2621
a97c13c3
JO		 2622void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2623 enum nl80211_cqm_rssi_threshold_event rssi_event,
2624 gfp_t gfp)
2625{
2626 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2627
b5878a2d
JB		 2628 trace_api_cqm_rssi_notify(sdata, rssi_event);
2629
a97c13c3
JO		 2630 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2631}
2632EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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