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mac80211: allow driver to disconnect after resume
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
77fdaa12 163 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 164{
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_supported_band *sband;
d5522e03
JB		 167 struct sta_info *sta;
168 u32 changed = 0;
172710bf 169 int hti_cfreq;
9ed6bcce 170 u16 ht_opmode;
0aaffa9b
JB		 171 bool enable_ht = true;
172 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 173 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
174
175 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176
0aaffa9b
JB		 177 prev_chantype = sdata->vif.bss_conf.channel_type;
178
d5522e03
JB		 179 /* HT is not supported */
180 if (!sband->ht_cap.ht_supported)
181 enable_ht = false;
182
172710bf
BG		 183 if (enable_ht) {
184 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
185 sband->band);
186 /* check that channel matches the right operating channel */
187 if (local->hw.conf.channel->center_freq != hti_cfreq) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
191 */
192 printk(KERN_DEBUG
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
197 sdata->name,
198 local->hw.conf.channel->center_freq,
199 hti_cfreq, hti->control_chan,
200 sband->band);
201 enable_ht = false;
202 }
203 }
d5522e03
JB		 204
205 if (enable_ht) {
206 channel_type = NL80211_CHAN_HT20;
207
208 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
209 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
210 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
211 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40PLUS))
215 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 216 break;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 218 if (!(local->hw.conf.channel->flags &
219 IEEE80211_CHAN_NO_HT40MINUS))
220 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 221 break;
222 }
223 }
224 }
225
fe6f212c
RC		 226 if (local->tmp_channel)
227 local->tmp_channel_type = channel_type;
d5522e03 228
0aaffa9b
JB		 229 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type = NL80211_CHAN_HT20;
232 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
233 }
d5522e03 234
0aaffa9b
JB		 235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local, 0);
d5522e03 237
0aaffa9b 238 if (prev_chantype != channel_type) {
d5522e03 239 rcu_read_lock();
abe60632 240 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 241 if (sta)
242 rate_control_rate_update(local, sband, sta,
4fa00437 243 IEEE80211_RC_HT_CHANGED,
0aaffa9b 244 channel_type);
d5522e03 245 rcu_read_unlock();
0aaffa9b 246 }
d5522e03 247
9ed6bcce 248 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 249
250 /* if bss configuration changed store the new one */
0aaffa9b
JB		 251 if (sdata->ht_opmode_valid != enable_ht ||
252 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
253 prev_chantype != channel_type) {
d5522e03 254 changed |= BSS_CHANGED_HT;
9ed6bcce 255 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 256 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 257 }
258
259 return changed;
260}
261
9c6bd790
JB		 262/* frame sending functions */
263
ef422bc0 264static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 265 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 266 void *cookie, bool send_frame)
9ac19a90
JB		 267{
268 struct ieee80211_local *local = sdata->local;
46900298 269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 270 struct sk_buff *skb;
271 struct ieee80211_mgmt *mgmt;
9aed3cc1 272
65fc73ac 273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 274 if (!skb) {
ef422bc0 275 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 276 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 277 return;
278 }
279 skb_reserve(skb, local->hw.extra_tx_headroom);
280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
77fdaa12 283 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 284 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 285 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 286 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 287 skb_put(skb, 2);
ef422bc0 288 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 289 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
290
53b46b84 291 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 292 if (cookie)
293 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
294 else
295 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 296 else
ce470613
HS		 297 if (cookie)
298 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
299 else
300 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 301 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
302 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 303
304 if (send_frame)
305 ieee80211_tx_skb(sdata, skb);
306 else
307 kfree_skb(skb);
9ac19a90
JB		 308}
309
572e0012
KV		 310void ieee80211_send_pspoll(struct ieee80211_local *local,
311 struct ieee80211_sub_if_data *sdata)
312{
572e0012
KV		 313 struct ieee80211_pspoll *pspoll;
314 struct sk_buff *skb;
572e0012 315
d8cd189e
KV		 316 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
317 if (!skb)
572e0012 318 return;
572e0012 319
d8cd189e
KV		 320 pspoll = (struct ieee80211_pspoll *) skb->data;
321 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 322
62ae67be
JB		 323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 325}
326
965bedad
JB		 327void ieee80211_send_nullfunc(struct ieee80211_local *local,
328 struct ieee80211_sub_if_data *sdata,
329 int powersave)
330{
331 struct sk_buff *skb;
d8cd189e 332 struct ieee80211_hdr_3addr *nullfunc;
965bedad 333
d8cd189e
KV		 334 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
335 if (!skb)
965bedad 336 return;
965bedad 337
d8cd189e 338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 339 if (powersave)
d8cd189e 340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 341
62ae67be
JB		 342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
343 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 344}
345
d524215f
FF		 346static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
347 struct ieee80211_sub_if_data *sdata)
348{
349 struct sk_buff *skb;
350 struct ieee80211_hdr *nullfunc;
351 __le16 fc;
352
353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
354 return;
355
356 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
357 if (!skb) {
358 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
359 "nullfunc frame\n", sdata->name);
360 return;
361 }
362 skb_reserve(skb, local->hw.extra_tx_headroom);
363
364 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
365 memset(nullfunc, 0, 30);
366 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
367 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
368 nullfunc->frame_control = fc;
369 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
370 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
371 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
372 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
373
374 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
375 ieee80211_tx_skb(sdata, skb);
376}
377
cc32abd4
JB		 378/* spectrum management related things */
379static void ieee80211_chswitch_work(struct work_struct *work)
380{
381 struct ieee80211_sub_if_data *sdata =
382 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
384
9607e6b6 385 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 386 return;
387
77fdaa12
JB		 388 mutex_lock(&ifmgd->mtx);
389 if (!ifmgd->associated)
390 goto out;
cc32abd4
JB		 391
392 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 393 if (!sdata->local->ops->channel_switch) {
394 /* call "hw_config" only if doing sw channel switch */
395 ieee80211_hw_config(sdata->local,
396 IEEE80211_CONF_CHANGE_CHANNEL);
397 }
77fdaa12 398
cc32abd4 399 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 400 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 401
cc32abd4
JB		 402 ieee80211_wake_queues_by_reason(&sdata->local->hw,
403 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 404 out:
405 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
406 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 407}
408
5ce6e438
JB		 409void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
410{
411 struct ieee80211_sub_if_data *sdata;
412 struct ieee80211_if_managed *ifmgd;
413
414 sdata = vif_to_sdata(vif);
415 ifmgd = &sdata->u.mgd;
416
417 trace_api_chswitch_done(sdata, success);
418 if (!success) {
419 /*
420 * If the channel switch was not successful, stay
421 * around on the old channel. We currently lack
422 * good handling of this situation, possibly we
423 * should just drop the association.
424 */
425 sdata->local->csa_channel = sdata->local->oper_channel;
426 }
427
428 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
429}
430EXPORT_SYMBOL(ieee80211_chswitch_done);
431
cc32abd4
JB		 432static void ieee80211_chswitch_timer(unsigned long data)
433{
434 struct ieee80211_sub_if_data *sdata =
435 (struct ieee80211_sub_if_data *) data;
436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
437
5bb644a0
JB		 438 if (sdata->local->quiescing) {
439 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
440 return;
441 }
442
42935eca 443 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 444}
445
446void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
447 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 448 struct ieee80211_bss *bss,
449 u64 timestamp)
cc32abd4 450{
0c1ad2ca
JB		 451 struct cfg80211_bss *cbss =
452 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 453 struct ieee80211_channel *new_ch;
454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 455 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
456 cbss->channel->band);
cc32abd4 457
77fdaa12
JB		 458 ASSERT_MGD_MTX(ifmgd);
459
460 if (!ifmgd->associated)
cc32abd4
JB		 461 return;
462
fbe9c429 463 if (sdata->local->scanning)
cc32abd4
JB		 464 return;
465
466 /* Disregard subsequent beacons if we are already running a timer
467 processing a CSA */
468
469 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
470 return;
471
472 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
473 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
474 return;
475
476 sdata->local->csa_channel = new_ch;
477
5ce6e438
JB		 478 if (sdata->local->ops->channel_switch) {
479 /* use driver's channel switch callback */
480 struct ieee80211_channel_switch ch_switch;
481 memset(&ch_switch, 0, sizeof(ch_switch));
482 ch_switch.timestamp = timestamp;
483 if (sw_elem->mode) {
484 ch_switch.block_tx = true;
485 ieee80211_stop_queues_by_reason(&sdata->local->hw,
486 IEEE80211_QUEUE_STOP_REASON_CSA);
487 }
488 ch_switch.channel = new_ch;
489 ch_switch.count = sw_elem->count;
490 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
491 drv_channel_switch(sdata->local, &ch_switch);
492 return;
493 }
494
495 /* channel switch handled in software */
cc32abd4 496 if (sw_elem->count <= 1) {
42935eca 497 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 498 } else {
9feaddc7
WYG		 499 if (sw_elem->mode)
500 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 501 IEEE80211_QUEUE_STOP_REASON_CSA);
502 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
503 mod_timer(&ifmgd->chswitch_timer,
504 jiffies +
505 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 506 cbss->beacon_interval));
cc32abd4
JB		 507 }
508}
509
510static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
511 u16 capab_info, u8 *pwr_constr_elem,
512 u8 pwr_constr_elem_len)
513{
514 struct ieee80211_conf *conf = &sdata->local->hw.conf;
515
516 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
517 return;
518
519 /* Power constraint IE length should be 1 octet */
520 if (pwr_constr_elem_len != 1)
521 return;
522
523 if ((*pwr_constr_elem <= conf->channel->max_power) &&
524 (*pwr_constr_elem != sdata->local->power_constr_level)) {
525 sdata->local->power_constr_level = *pwr_constr_elem;
526 ieee80211_hw_config(sdata->local, 0);
527 }
528}
529
f90754c1
JO		 530void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
531{
532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
533 struct ieee80211_local *local = sdata->local;
534 struct ieee80211_conf *conf = &local->hw.conf;
535
536 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
537 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
538 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
539
540 local->disable_dynamic_ps = false;
541 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
542}
543EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
544
545void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
546{
547 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
548 struct ieee80211_local *local = sdata->local;
549 struct ieee80211_conf *conf = &local->hw.conf;
550
551 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
552 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
553 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
554
555 local->disable_dynamic_ps = true;
556 conf->dynamic_ps_timeout = 0;
557 del_timer_sync(&local->dynamic_ps_timer);
558 ieee80211_queue_work(&local->hw,
559 &local->dynamic_ps_enable_work);
560}
561EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
562
965bedad
JB		 563/* powersave */
564static void ieee80211_enable_ps(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata)
566{
567 struct ieee80211_conf *conf = &local->hw.conf;
568
d5edaedc
JB		 569 /*
570 * If we are scanning right now then the parameters will
571 * take effect when scan finishes.
572 */
fbe9c429 573 if (local->scanning)
d5edaedc
JB		 574 return;
575
965bedad
JB		 576 if (conf->dynamic_ps_timeout > 0 &&
577 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
578 mod_timer(&local->dynamic_ps_timer, jiffies +
579 msecs_to_jiffies(conf->dynamic_ps_timeout));
580 } else {
581 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
582 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 583
2a13052f
JO		 584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
585 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
586 return;
587
588 conf->flags |= IEEE80211_CONF_PS;
589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 590 }
591}
592
593static void ieee80211_change_ps(struct ieee80211_local *local)
594{
595 struct ieee80211_conf *conf = &local->hw.conf;
596
597 if (local->ps_sdata) {
965bedad
JB		 598 ieee80211_enable_ps(local, local->ps_sdata);
599 } else if (conf->flags & IEEE80211_CONF_PS) {
600 conf->flags &= ~IEEE80211_CONF_PS;
601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 del_timer_sync(&local->dynamic_ps_timer);
603 cancel_work_sync(&local->dynamic_ps_enable_work);
604 }
605}
606
808118cb
JY		 607static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
608{
609 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
610 struct sta_info *sta = NULL;
611 u32 sta_flags = 0;
612
613 if (!mgd->powersave)
614 return false;
615
616 if (!mgd->associated)
617 return false;
618
619 if (!mgd->associated->beacon_ies)
620 return false;
621
622 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
623 IEEE80211_STA_CONNECTION_POLL))
624 return false;
625
626 rcu_read_lock();
627 sta = sta_info_get(sdata, mgd->bssid);
628 if (sta)
629 sta_flags = get_sta_flags(sta);
630 rcu_read_unlock();
631
632 if (!(sta_flags & WLAN_STA_AUTHORIZED))
633 return false;
634
635 return true;
636}
637
965bedad 638/* need to hold RTNL or interface lock */
10f644a4 639void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 640{
641 struct ieee80211_sub_if_data *sdata, *found = NULL;
642 int count = 0;
195e294d 643 int timeout;
965bedad
JB		 644
645 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
646 local->ps_sdata = NULL;
647 return;
648 }
649
af6b6374
JB		 650 if (!list_empty(&local->work_list)) {
651 local->ps_sdata = NULL;
652 goto change;
653 }
654
965bedad 655 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 656 if (!ieee80211_sdata_running(sdata))
965bedad 657 continue;
8c7914de
RM		 658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
659 /* If an AP vif is found, then disable PS
660 * by setting the count to zero thereby setting
661 * ps_sdata to NULL.
662 */
663 count = 0;
664 break;
665 }
965bedad
JB		 666 if (sdata->vif.type != NL80211_IFTYPE_STATION)
667 continue;
668 found = sdata;
669 count++;
670 }
671
808118cb 672 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 673 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 674 s32 beaconint_us;
675
676 if (latency < 0)
ed77134b 677 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 678
679 beaconint_us = ieee80211_tu_to_usec(
680 found->vif.bss_conf.beacon_int);
681
ff616381 682 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 683 if (timeout < 0) {
684 /*
ff616381
JO		 685 * Go to full PSM if the user configures a very low
686 * latency requirement.
0ab82b04
EP		 687 * The 2000 second value is there for compatibility
688 * until the PM_QOS_NETWORK_LATENCY is configured
689 * with real values.
195e294d 690 */
0ab82b04
EP		 691 if (latency > (1900 * USEC_PER_MSEC) &&
692 latency != (2000 * USEC_PER_SEC))
195e294d 693 timeout = 0;
ff616381
JO		 694 else
695 timeout = 100;
195e294d 696 }
f90754c1
JO		 697 local->dynamic_ps_user_timeout = timeout;
698 if (!local->disable_dynamic_ps)
699 conf->dynamic_ps_timeout =
700 local->dynamic_ps_user_timeout;
195e294d 701
04fe2037 702 if (beaconint_us > latency) {
10f644a4 703 local->ps_sdata = NULL;
04fe2037 704 } else {
56007a02 705 struct ieee80211_bss *bss;
04fe2037 706 int maxslp = 1;
56007a02 707 u8 dtimper;
04fe2037 708
56007a02
JB		 709 bss = (void *)found->u.mgd.associated->priv;
710 dtimper = bss->dtim_period;
711
712 /* If the TIM IE is invalid, pretend the value is 1 */
713 if (!dtimper)
714 dtimper = 1;
715 else if (dtimper > 1)
04fe2037
JB		 716 maxslp = min_t(int, dtimper,
717 latency / beaconint_us);
718
9ccebe61 719 local->hw.conf.max_sleep_period = maxslp;
56007a02 720 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 721 local->ps_sdata = found;
04fe2037 722 }
10f644a4 723 } else {
965bedad 724 local->ps_sdata = NULL;
10f644a4 725 }
965bedad 726
af6b6374 727 change:
965bedad
JB		 728 ieee80211_change_ps(local);
729}
730
731void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
732{
733 struct ieee80211_local *local =
734 container_of(work, struct ieee80211_local,
735 dynamic_ps_disable_work);
736
737 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
738 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
740 }
741
742 ieee80211_wake_queues_by_reason(&local->hw,
743 IEEE80211_QUEUE_STOP_REASON_PS);
744}
745
746void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
747{
748 struct ieee80211_local *local =
749 container_of(work, struct ieee80211_local,
750 dynamic_ps_enable_work);
751 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 752 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 753 unsigned long flags;
754 int q;
965bedad
JB		 755
756 /* can only happen when PS was just disabled anyway */
757 if (!sdata)
758 return;
759
5e34069c
CL		 760 ifmgd = &sdata->u.mgd;
761
965bedad
JB		 762 if (local->hw.conf.flags & IEEE80211_CONF_PS)
763 return;
764
77b7023a
AN		 765 if (!local->disable_dynamic_ps &&
766 local->hw.conf.dynamic_ps_timeout > 0) {
767 /* don't enter PS if TX frames are pending */
768 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 769 mod_timer(&local->dynamic_ps_timer, jiffies +
770 msecs_to_jiffies(
771 local->hw.conf.dynamic_ps_timeout));
772 return;
773 }
77b7023a
AN		 774
775 /*
776 * transmission can be stopped by others which leads to
777 * dynamic_ps_timer expiry. Postpone the ps timer if it
778 * is not the actual idle state.
779 */
780 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
781 for (q = 0; q < local->hw.queues; q++) {
782 if (local->queue_stop_reasons[q]) {
783 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
784 flags);
785 mod_timer(&local->dynamic_ps_timer, jiffies +
786 msecs_to_jiffies(
787 local->hw.conf.dynamic_ps_timeout));
788 return;
789 }
790 }
791 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 792 }
1ddc2867 793
375177bf 794 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 795 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
796 netif_tx_stop_all_queues(sdata->dev);
965bedad 797
e8306f98
VN		 798 if (drv_tx_frames_pending(local))
799 mod_timer(&local->dynamic_ps_timer, jiffies +
800 msecs_to_jiffies(
801 local->hw.conf.dynamic_ps_timeout));
802 else {
803 ieee80211_send_nullfunc(local, sdata, 1);
804 /* Flush to get the tx status of nullfunc frame */
805 drv_flush(local, false);
806 }
f3e85b9e
VN		 807 }
808
2a13052f
JO		 809 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
810 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 811 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
812 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
813 local->hw.conf.flags |= IEEE80211_CONF_PS;
814 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
815 }
f3e85b9e 816
77b7023a
AN		 817 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
818 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 819}
820
821void ieee80211_dynamic_ps_timer(unsigned long data)
822{
823 struct ieee80211_local *local = (void *) data;
824
78f1a8b7 825 if (local->quiescing || local->suspended)
5bb644a0
JB		 826 return;
827
42935eca 828 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 829}
830
60f8b39c 831/* MLME */
f698d856 832static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 833 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 834 u8 *wmm_param, size_t wmm_param_len)
835{
f0706e82 836 struct ieee80211_tx_queue_params params;
4ced3f74 837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 838 size_t left;
839 int count;
ab13315a 840 u8 *pos, uapsd_queues = 0;
f0706e82 841
e1b3ec1a
SG		 842 if (!local->ops->conf_tx)
843 return;
844
af6b6374 845 if (local->hw.queues < 4)
3434fbd3
JB		 846 return;
847
848 if (!wmm_param)
849 return;
850
f0706e82
JB		 851 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
852 return;
ab13315a
KV		 853
854 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 855 uapsd_queues = local->uapsd_queues;
ab13315a 856
f0706e82 857 count = wmm_param[6] & 0x0f;
46900298 858 if (count == ifmgd->wmm_last_param_set)
f0706e82 859 return;
46900298 860 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 861
862 pos = wmm_param + 8;
863 left = wmm_param_len - 8;
864
865 memset(&params, 0, sizeof(params));
866
f0706e82
JB		 867 local->wmm_acm = 0;
868 for (; left >= 4; left -= 4, pos += 4) {
869 int aci = (pos[0] >> 5) & 0x03;
870 int acm = (pos[0] >> 4) & 0x01;
ab13315a 871 bool uapsd = false;
f0706e82
JB		 872 int queue;
873
874 switch (aci) {
0eeb59fe 875 case 1: /* AC_BK */
e100bb64 876 queue = 3;
988c0f72 877 if (acm)
0eeb59fe 878 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 879 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
880 uapsd = true;
f0706e82 881 break;
0eeb59fe 882 case 2: /* AC_VI */
e100bb64 883 queue = 1;
988c0f72 884 if (acm)
0eeb59fe 885 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 886 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
887 uapsd = true;
f0706e82 888 break;
0eeb59fe 889 case 3: /* AC_VO */
e100bb64 890 queue = 0;
988c0f72 891 if (acm)
0eeb59fe 892 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 893 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
894 uapsd = true;
f0706e82 895 break;
0eeb59fe 896 case 0: /* AC_BE */
f0706e82 897 default:
e100bb64 898 queue = 2;
988c0f72 899 if (acm)
0eeb59fe 900 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 901 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
902 uapsd = true;
f0706e82
JB		 903 break;
904 }
905
906 params.aifs = pos[0] & 0x0f;
907 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
908 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 909 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 910 params.uapsd = uapsd;
911
f4ea83dd 912#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 913 wiphy_debug(local->hw.wiphy,
914 "WMM queue=%d aci=%d acm=%d aifs=%d "
915 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
916 queue, aci, acm,
917 params.aifs, params.cw_min, params.cw_max,
918 params.txop, params.uapsd);
3330d7be 919#endif
e1b3ec1a 920 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 921 wiphy_debug(local->hw.wiphy,
922 "failed to set TX queue parameters for queue %d\n",
923 queue);
f0706e82 924 }
e1b3ec1a
SG		 925
926 /* enable WMM or activate new settings */
4ced3f74
JB		 927 sdata->vif.bss_conf.qos = true;
928 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 929}
930
7a5158ef
JB		 931static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
932 u16 capab, bool erp_valid, u8 erp)
5628221c 933{
bda3933a 934 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 935 u32 changed = 0;
7a5158ef
JB		 936 bool use_protection;
937 bool use_short_preamble;
938 bool use_short_slot;
939
940 if (erp_valid) {
941 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
942 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
943 } else {
944 use_protection = false;
945 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
946 }
947
948 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 949 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
950 use_short_slot = true;
5628221c 951
471b3efd 952 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 953 bss_conf->use_cts_prot = use_protection;
954 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 955 }
7e9ed188 956
d43c7b37 957 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 958 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 959 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 960 }
d9430a32 961
7a5158ef 962 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 963 bss_conf->use_short_slot = use_short_slot;
964 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 965 }
966
967 return changed;
968}
969
f698d856 970static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 971 struct cfg80211_bss *cbss,
ae5eb026 972 u32 bss_info_changed)
f0706e82 973{
0c1ad2ca 974 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 975 struct ieee80211_local *local = sdata->local;
68542962 976 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 977
ae5eb026 978 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 979 /* set timing information */
68542962
JO		 980 bss_conf->beacon_int = cbss->beacon_interval;
981 bss_conf->timestamp = cbss->tsf;
5628221c 982
77fdaa12
JB		 983 bss_info_changed |= BSS_CHANGED_BEACON_INT;
984 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 985 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 986
7ccc8bd7
FF		 987 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
988 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
989
0c1ad2ca
JB		 990 sdata->u.mgd.associated = cbss;
991 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 992
17e4ec14
JM		 993 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
994
b291ba11
JB		 995 /* just to be sure */
996 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
997 IEEE80211_STA_BEACON_POLL);
998
9ac19a90 999 ieee80211_led_assoc(local, 1);
9306102e 1000
e5b900d2
JB		 1001 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1002 bss_conf->dtim_period = bss->dtim_period;
1003 else
1004 bss_conf->dtim_period = 0;
1005
68542962 1006 bss_conf->assoc = 1;
96dd22ac
JB		 1007 /*
1008 * For now just always ask the driver to update the basic rateset
1009 * when we have associated, we aren't checking whether it actually
1010 * changed or not.
1011 */
ae5eb026 1012 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1013
1014 /* And the BSSID changed - we're associated now */
1015 bss_info_changed |= BSS_CHANGED_BSSID;
1016
a97c13c3
JO		 1017 /* Tell the driver to monitor connection quality (if supported) */
1018 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1019 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1020 bss_info_changed |= BSS_CHANGED_CQM;
1021
68542962
JO		 1022 /* Enable ARP filtering */
1023 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1024 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1025 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1026 }
1027
ae5eb026 1028 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1029
056508dc
JB		 1030 mutex_lock(&local->iflist_mtx);
1031 ieee80211_recalc_ps(local, -1);
025e6be2 1032 ieee80211_recalc_smps(local);
056508dc 1033 mutex_unlock(&local->iflist_mtx);
e0cb686f 1034
8a5b33f5 1035 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1036 netif_carrier_on(sdata->dev);
f0706e82
JB		 1037}
1038
e69e95db 1039static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1040 bool remove_sta, bool tx)
aa458d17 1041{
46900298 1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1043 struct ieee80211_local *local = sdata->local;
1044 struct sta_info *sta;
e0cb686f 1045 u32 changed = 0, config_changed = 0;
b291ba11 1046 u8 bssid[ETH_ALEN];
aa458d17 1047
77fdaa12
JB		 1048 ASSERT_MGD_MTX(ifmgd);
1049
b291ba11
JB		 1050 if (WARN_ON(!ifmgd->associated))
1051 return;
1052
0c1ad2ca 1053 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1054
77fdaa12
JB		 1055 ifmgd->associated = NULL;
1056 memset(ifmgd->bssid, 0, ETH_ALEN);
1057
1058 /*
1059 * we need to commit the associated = NULL change because the
1060 * scan code uses that to determine whether this iface should
1061 * go to/wake up from powersave or not -- and could otherwise
1062 * wake the queues erroneously.
1063 */
1064 smp_mb();
1065
1066 /*
1067 * Thus, we can only afterwards stop the queues -- to account
1068 * for the case where another CPU is finishing a scan at this
1069 * time -- we don't want the scan code to enable queues.
1070 */
aa458d17 1071
8a5b33f5 1072 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1073 netif_carrier_off(sdata->dev);
1074
2a419056 1075 mutex_lock(&local->sta_mtx);
abe60632 1076 sta = sta_info_get(sdata, bssid);
4cad6c7c 1077 if (sta) {
2a419056 1078 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1079 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1080 }
2a419056 1081 mutex_unlock(&local->sta_mtx);
aa458d17 1082
f5e5bf25
TW		 1083 changed |= ieee80211_reset_erp_info(sdata);
1084
f5e5bf25 1085 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1086 changed |= BSS_CHANGED_ASSOC;
1087 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1088
aa837e1d
JB		 1089 ieee80211_set_wmm_default(sdata);
1090
4797938c 1091 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1092 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1093
413ad50a
JB		 1094 /* on the next assoc, re-program HT parameters */
1095 sdata->ht_opmode_valid = false;
1096
a8302de9
VT		 1097 local->power_constr_level = 0;
1098
520eb820
KV		 1099 del_timer_sync(&local->dynamic_ps_timer);
1100 cancel_work_sync(&local->dynamic_ps_enable_work);
1101
e0cb686f
KV		 1102 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1103 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1104 config_changed |= IEEE80211_CONF_CHANGE_PS;
1105 }
a331400b 1106 local->ps_sdata = NULL;
ae5eb026 1107
e0cb686f 1108 ieee80211_hw_config(local, config_changed);
9cef8737 1109
68542962
JO		 1110 /* Disable ARP filtering */
1111 if (sdata->vif.bss_conf.arp_filter_enabled) {
1112 sdata->vif.bss_conf.arp_filter_enabled = false;
1113 changed |= BSS_CHANGED_ARP_FILTER;
1114 }
1115
0aaffa9b
JB		 1116 /* The BSSID (not really interesting) and HT changed */
1117 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1118 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1119
e69e95db
JM		 1120 if (remove_sta)
1121 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1122
1123 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1124 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1125 del_timer_sync(&sdata->u.mgd.timer);
1126 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1127}
f0706e82 1128
3cf335d5
KV		 1129void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1130 struct ieee80211_hdr *hdr)
1131{
1132 /*
1133 * We can postpone the mgd.timer whenever receiving unicast frames
1134 * from AP because we know that the connection is working both ways
1135 * at that time. But multicast frames (and hence also beacons) must
1136 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1137 * data idle periods for sending the periodic probe request to the
1138 * AP we're connected to.
3cf335d5 1139 */
b291ba11
JB		 1140 if (is_multicast_ether_addr(hdr->addr1))
1141 return;
1142
be099e82 1143 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1144}
f0706e82 1145
4e5ff376
FF		 1146static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1147{
1148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1149
1150 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1151 IEEE80211_STA_CONNECTION_POLL)))
1152 return;
1153
1154 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1155 IEEE80211_STA_BEACON_POLL);
1156 mutex_lock(&sdata->local->iflist_mtx);
1157 ieee80211_recalc_ps(sdata->local, -1);
1158 mutex_unlock(&sdata->local->iflist_mtx);
1159
1160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1161 return;
1162
1163 /*
1164 * We've received a probe response, but are not sure whether
1165 * we have or will be receiving any beacons or data, so let's
1166 * schedule the timers again, just in case.
1167 */
1168 ieee80211_sta_reset_beacon_monitor(sdata);
1169
1170 mod_timer(&ifmgd->conn_mon_timer,
1171 round_jiffies_up(jiffies +
1172 IEEE80211_CONNECTION_IDLE_TIME));
1173}
1174
1175void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1176 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1177{
75706d0e 1178 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1179 return;
1180
04ac3c0e
FF		 1181 if (ack)
1182 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1183
1184 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1185 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1186 if (ack)
1187 sdata->u.mgd.probe_send_count = 0;
1188 else
1189 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1190 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1191 }
1192}
1193
a43abf29
ML		 1194static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1195{
1196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1197 const u8 *ssid;
f01a067d 1198 u8 *dst = ifmgd->associated->bssid;
180205bd 1199 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1200
1201 /*
1202 * Try sending broadcast probe requests for the last three
1203 * probe requests after the first ones failed since some
1204 * buggy APs only support broadcast probe requests.
1205 */
1206 if (ifmgd->probe_send_count >= unicast_limit)
1207 dst = NULL;
a43abf29 1208
4e5ff376
FF		 1209 /*
1210 * When the hardware reports an accurate Tx ACK status, it's
1211 * better to send a nullfunc frame instead of a probe request,
1212 * as it will kick us off the AP quickly if we aren't associated
1213 * anymore. The timeout will be reset if the frame is ACKed by
1214 * the AP.
1215 */
04ac3c0e
FF		 1216 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1217 ifmgd->nullfunc_failed = false;
4e5ff376 1218 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1219 } else {
4e5ff376 1220 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558
PS		 1221 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1222 true);
4e5ff376 1223 }
a43abf29
ML		 1224
1225 ifmgd->probe_send_count++;
180205bd 1226 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1227 run_again(ifmgd, ifmgd->probe_timeout);
1228}
1229
b291ba11
JB		 1230static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1231 bool beacon)
04de8381 1232{
04de8381 1233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1234 bool already = false;
34bfc411 1235
9607e6b6 1236 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1237 return;
1238
91a3bd76
LR		 1239 if (sdata->local->scanning)
1240 return;
1241
b8bc4b0a
JB		 1242 if (sdata->local->tmp_channel)
1243 return;
1244
77fdaa12
JB		 1245 mutex_lock(&ifmgd->mtx);
1246
1247 if (!ifmgd->associated)
1248 goto out;
1249
a860402d 1250#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1251 if (beacon && net_ratelimit())
1252 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1253 "- sending probe request\n", sdata->name);
a860402d 1254#endif
04de8381 1255
b291ba11
JB		 1256 /*
1257 * The driver/our work has already reported this event or the
1258 * connection monitoring has kicked in and we have already sent
1259 * a probe request. Or maybe the AP died and the driver keeps
1260 * reporting until we disassociate...
1261 *
1262 * In either case we have to ignore the current call to this
1263 * function (except for setting the correct probe reason bit)
1264 * because otherwise we would reset the timer every time and
1265 * never check whether we received a probe response!
1266 */
1267 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1268 IEEE80211_STA_CONNECTION_POLL))
1269 already = true;
1270
1271 if (beacon)
1272 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1273 else
1274 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1275
1276 if (already)
1277 goto out;
1278
4e751843
JB		 1279 mutex_lock(&sdata->local->iflist_mtx);
1280 ieee80211_recalc_ps(sdata->local, -1);
1281 mutex_unlock(&sdata->local->iflist_mtx);
1282
a43abf29
ML		 1283 ifmgd->probe_send_count = 0;
1284 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1285 out:
1286 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1287}
1288
a619a4c0
JO		 1289struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1290 struct ieee80211_vif *vif)
1291{
1292 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1294 struct sk_buff *skb;
1295 const u8 *ssid;
1296
1297 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1298 return NULL;
1299
1300 ASSERT_MGD_MTX(ifmgd);
1301
1302 if (!ifmgd->associated)
1303 return NULL;
1304
1305 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1306 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
a806c558 1307 ssid + 2, ssid[1], NULL, 0, true);
a619a4c0
JO		 1308
1309 return skb;
1310}
1311EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1312
1e4dcd01
JO		 1313static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1314{
1315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1316 struct ieee80211_local *local = sdata->local;
1317 u8 bssid[ETH_ALEN];
1318
1319 mutex_lock(&ifmgd->mtx);
1320 if (!ifmgd->associated) {
1321 mutex_unlock(&ifmgd->mtx);
1322 return;
1323 }
1324
1325 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1326
180205bd
BG		 1327 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1328 sdata->name, bssid);
1e4dcd01 1329
53f73c09 1330 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1331 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1332
1333 mutex_lock(&local->mtx);
1334 ieee80211_recalc_idle(local);
1335 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1336 /*
1337 * must be outside lock due to cfg80211,
1338 * but that's not a problem.
1339 */
1340 ieee80211_send_deauth_disassoc(sdata, bssid,
1341 IEEE80211_STYPE_DEAUTH,
1342 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1343 NULL, true);
1e4dcd01
JO		 1344}
1345
1346void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1347{
1348 struct ieee80211_sub_if_data *sdata =
1349 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1350 u.mgd.beacon_connection_loss_work);
b291ba11 1351
1e4dcd01
JO		 1352 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1353 __ieee80211_connection_loss(sdata);
1354 else
1355 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1356}
1357
04de8381
KV		 1358void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1359{
1360 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1361 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1362
b5878a2d
JB		 1363 trace_api_beacon_loss(sdata);
1364
1e4dcd01
JO		 1365 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1366 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1367}
1368EXPORT_SYMBOL(ieee80211_beacon_loss);
1369
1e4dcd01
JO		 1370void ieee80211_connection_loss(struct ieee80211_vif *vif)
1371{
1372 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1373 struct ieee80211_hw *hw = &sdata->local->hw;
1374
b5878a2d
JB		 1375 trace_api_connection_loss(sdata);
1376
1e4dcd01
JO		 1377 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1378 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1379}
1380EXPORT_SYMBOL(ieee80211_connection_loss);
1381
1382
77fdaa12
JB		 1383static enum rx_mgmt_action __must_check
1384ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1385 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1386{
46900298 1387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1388 const u8 *bssid = NULL;
f0706e82
JB		 1389 u16 reason_code;
1390
f4ea83dd 1391 if (len < 24 + 2)
77fdaa12 1392 return RX_MGMT_NONE;
f0706e82 1393
77fdaa12
JB		 1394 ASSERT_MGD_MTX(ifmgd);
1395
0c1ad2ca 1396 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1397
1398 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1399
77fdaa12 1400 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1401 sdata->name, bssid, reason_code);
77fdaa12 1402
53f73c09 1403 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1404 mutex_lock(&sdata->local->mtx);
63f170e0 1405 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1406 mutex_unlock(&sdata->local->mtx);
f0706e82 1407
77fdaa12 1408 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1409}
1410
1411
77fdaa12
JB		 1412static enum rx_mgmt_action __must_check
1413ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1414 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1415{
46900298 1416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1417 u16 reason_code;
1418
f4ea83dd 1419 if (len < 24 + 2)
77fdaa12 1420 return RX_MGMT_NONE;
f0706e82 1421
77fdaa12
JB		 1422 ASSERT_MGD_MTX(ifmgd);
1423
1424 if (WARN_ON(!ifmgd->associated))
1425 return RX_MGMT_NONE;
1426
0c1ad2ca 1427 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1428 return RX_MGMT_NONE;
f0706e82
JB		 1429
1430 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1431
0ff71613 1432 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1433 sdata->name, mgmt->sa, reason_code);
f0706e82 1434
53f73c09 1435 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1436 mutex_lock(&sdata->local->mtx);
bc83b681 1437 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1438 mutex_unlock(&sdata->local->mtx);
77fdaa12 1439 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1440}
1441
1442
af6b6374
JB		 1443static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1444 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1445{
af6b6374 1446 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1447 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1448 struct ieee80211_local *local = sdata->local;
8318d78a 1449 struct ieee80211_supported_band *sband;
f0706e82 1450 struct sta_info *sta;
0c1ad2ca 1451 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1452 u8 *pos;
881d948c 1453 u32 rates, basic_rates;
af6b6374 1454 u16 capab_info, aid;
f0706e82 1455 struct ieee802_11_elems elems;
bda3933a 1456 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1457 u32 changed = 0;
5d1ec85f
JB		 1458 int i, j, err;
1459 bool have_higher_than_11mbit = false;
ae5eb026 1460 u16 ap_ht_cap_flags;
f0706e82 1461
af6b6374 1462 /* AssocResp and ReassocResp have identical structure */
f0706e82 1463
f0706e82 1464 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1465 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1466
1dd84aa2
JB		 1467 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1468 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1469 "set\n", sdata->name, aid);
1dd84aa2
JB		 1470 aid &= ~(BIT(15) | BIT(14));
1471
af6b6374
JB		 1472 pos = mgmt->u.assoc_resp.variable;
1473 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1474
f0706e82
JB		 1475 if (!elems.supp_rates) {
1476 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1477 sdata->name);
af6b6374 1478 return false;
f0706e82
JB		 1479 }
1480
46900298 1481 ifmgd->aid = aid;
f0706e82 1482
0c1ad2ca 1483 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1484 if (!sta) {
5d1ec85f
JB		 1485 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1486 " the AP\n", sdata->name);
af6b6374 1487 return false;
77fdaa12 1488 }
05e5e883 1489
5d1ec85f
JB		 1490 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1491 WLAN_STA_ASSOC_AP);
1492 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1493 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1494
60f8b39c
JB		 1495 rates = 0;
1496 basic_rates = 0;
e7480bbb 1497 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1498
60f8b39c
JB		 1499 for (i = 0; i < elems.supp_rates_len; i++) {
1500 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1501 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1502
60f8b39c
JB		 1503 if (rate > 110)
1504 have_higher_than_11mbit = true;
1505
1506 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1507 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1508 rates |= BIT(j);
d61272cb
TW		 1509 if (is_basic)
1510 basic_rates |= BIT(j);
1511 break;
1512 }
f709fc69 1513 }
f709fc69
LCC		 1514 }
1515
60f8b39c
JB		 1516 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1517 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1518 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1519
60f8b39c
JB		 1520 if (rate > 110)
1521 have_higher_than_11mbit = true;
f0706e82 1522
60f8b39c 1523 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1524 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1525 rates |= BIT(j);
d61272cb
TW		 1526 if (is_basic)
1527 basic_rates |= BIT(j);
1528 break;
1529 }
60f8b39c 1530 }
1ebebea8 1531 }
f0706e82 1532
e7480bbb 1533 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1534 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1535
1536 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1537 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1538 have_higher_than_11mbit)
1539 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1540 else
1541 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1542
ab1faead 1543 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1544 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1545 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1546
1547 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1548
4b7679a5 1549 rate_control_rate_init(sta);
f0706e82 1550
46900298 1551 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1552 set_sta_flags(sta, WLAN_STA_MFP);
1553
ddf4ac53 1554 if (elems.wmm_param)
60f8b39c 1555 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1556
5d1ec85f
JB		 1557 err = sta_info_insert(sta);
1558 sta = NULL;
1559 if (err) {
1560 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1561 " the AP (error %d)\n", sdata->name, err);
90be561b 1562 return false;
ddf4ac53
JB		 1563 }
1564
f2176d72
JO		 1565 /*
1566 * Always handle WMM once after association regardless
1567 * of the first value the AP uses. Setting -1 here has
1568 * that effect because the AP values is an unsigned
1569 * 4-bit value.
1570 */
1571 ifmgd->wmm_last_param_set = -1;
1572
ddf4ac53 1573 if (elems.wmm_param)
4ced3f74 1574 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1575 elems.wmm_param_len);
aa837e1d
JB		 1576 else
1577 ieee80211_set_wmm_default(sdata);
f0706e82 1578
e4da8c37
JB		 1579 local->oper_channel = wk->chan;
1580
ae5eb026 1581 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1582 (sdata->local->hw.queues >= 4) &&
ab1faead 1583 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1584 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1585 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1586
60f8b39c
JB		 1587 /* set AID and assoc capability,
1588 * ieee80211_set_associated() will tell the driver */
1589 bss_conf->aid = aid;
1590 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1591 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1592
d524215f
FF		 1593 /*
1594 * If we're using 4-addr mode, let the AP know that we're
1595 * doing so, so that it can create the STA VLAN on its side
1596 */
1597 if (ifmgd->use_4addr)
1598 ieee80211_send_4addr_nullfunc(local, sdata);
1599
15b7b062 1600 /*
b291ba11
JB		 1601 * Start timer to probe the connection to the AP now.
1602 * Also start the timer that will detect beacon loss.
15b7b062 1603 */
b291ba11 1604 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1605 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1606
af6b6374 1607 return true;
f0706e82
JB		 1608}
1609
1610
98c8fccf
JB		 1611static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1612 struct ieee80211_mgmt *mgmt,
1613 size_t len,
1614 struct ieee80211_rx_status *rx_status,
1615 struct ieee802_11_elems *elems,
1616 bool beacon)
1617{
1618 struct ieee80211_local *local = sdata->local;
1619 int freq;
c2b13452 1620 struct ieee80211_bss *bss;
98c8fccf 1621 struct ieee80211_channel *channel;
56007a02
JB		 1622 bool need_ps = false;
1623
1624 if (sdata->u.mgd.associated) {
1625 bss = (void *)sdata->u.mgd.associated->priv;
1626 /* not previously set so we may need to recalc */
1627 need_ps = !bss->dtim_period;
1628 }
98c8fccf
JB		 1629
1630 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1631 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1632 rx_status->band);
98c8fccf
JB		 1633 else
1634 freq = rx_status->freq;
1635
1636 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1637
1638 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1639 return;
1640
98c8fccf 1641 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1642 channel, beacon);
77fdaa12
JB		 1643 if (bss)
1644 ieee80211_rx_bss_put(local, bss);
1645
1646 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1647 return;
1648
56007a02
JB		 1649 if (need_ps) {
1650 mutex_lock(&local->iflist_mtx);
1651 ieee80211_recalc_ps(local, -1);
1652 mutex_unlock(&local->iflist_mtx);
1653 }
1654
c481ec97 1655 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1656 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1657 ETH_ALEN) == 0)) {
c481ec97
S		 1658 struct ieee80211_channel_sw_ie *sw_elem =
1659 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1660 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1661 bss, rx_status->mactime);
c481ec97 1662 }
f0706e82
JB		 1663}
1664
1665
f698d856 1666static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1667 struct sk_buff *skb)
f0706e82 1668{
af6b6374 1669 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1670 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1671 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1672 size_t baselen, len = skb->len;
ae6a44e3
EK		 1673 struct ieee802_11_elems elems;
1674
15b7b062
KV		 1675 ifmgd = &sdata->u.mgd;
1676
77fdaa12
JB		 1677 ASSERT_MGD_MTX(ifmgd);
1678
47846c9b 1679 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1680 return; /* ignore ProbeResp to foreign address */
1681
ae6a44e3
EK		 1682 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1683 if (baselen > len)
1684 return;
1685
1686 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1687 &elems);
1688
98c8fccf 1689 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1690
77fdaa12 1691 if (ifmgd->associated &&
4e5ff376
FF		 1692 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1693 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1694}
1695
d91f36db
JB		 1696/*
1697 * This is the canonical list of information elements we care about,
1698 * the filter code also gives us all changes to the Microsoft OUI
1699 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1700 *
1701 * We implement beacon filtering in software since that means we can
1702 * avoid processing the frame here and in cfg80211, and userspace
1703 * will not be able to tell whether the hardware supports it or not.
1704 *
1705 * XXX: This list needs to be dynamic -- userspace needs to be able to
1706 * add items it requires. It also needs to be able to tell us to
1707 * look out for other vendor IEs.
1708 */
1709static const u64 care_about_ies =
1d4df3a5
JB		 1710 (1ULL << WLAN_EID_COUNTRY) |
1711 (1ULL << WLAN_EID_ERP_INFO) |
1712 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1713 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1714 (1ULL << WLAN_EID_HT_CAPABILITY) |
1715 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1716
f698d856 1717static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1718 struct ieee80211_mgmt *mgmt,
1719 size_t len,
1720 struct ieee80211_rx_status *rx_status)
1721{
d91f36db 1722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1723 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1724 size_t baselen;
1725 struct ieee802_11_elems elems;
f698d856 1726 struct ieee80211_local *local = sdata->local;
471b3efd 1727 u32 changed = 0;
d91f36db 1728 bool erp_valid, directed_tim = false;
7a5158ef 1729 u8 erp_value = 0;
d91f36db 1730 u32 ncrc;
77fdaa12
JB		 1731 u8 *bssid;
1732
1733 ASSERT_MGD_MTX(ifmgd);
f0706e82 1734
ae6a44e3
EK		 1735 /* Process beacon from the current BSS */
1736 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1737 if (baselen > len)
1738 return;
1739
d91f36db 1740 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1741 return;
f0706e82 1742
b291ba11
JB		 1743 /*
1744 * We might have received a number of frames, among them a
1745 * disassoc frame and a beacon...
1746 */
1747 if (!ifmgd->associated)
77fdaa12
JB		 1748 return;
1749
0c1ad2ca 1750 bssid = ifmgd->associated->bssid;
77fdaa12 1751
b291ba11
JB		 1752 /*
1753 * And in theory even frames from a different AP we were just
1754 * associated to a split-second ago!
1755 */
1756 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1757 return;
1758
17e4ec14
JM		 1759 /* Track average RSSI from the Beacon frames of the current AP */
1760 ifmgd->last_beacon_signal = rx_status->signal;
1761 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1762 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1763 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1764 ifmgd->last_cqm_event_signal = 0;
391a200a 1765 ifmgd->count_beacon_signal = 1;
615f7b9b 1766 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1767 } else {
1768 ifmgd->ave_beacon_signal =
1769 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1770 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1771 ifmgd->ave_beacon_signal) / 16;
391a200a 1772 ifmgd->count_beacon_signal++;
17e4ec14 1773 }
615f7b9b
MV		 1774
1775 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1776 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1777 int sig = ifmgd->ave_beacon_signal;
1778 int last_sig = ifmgd->last_ave_beacon_signal;
1779
1780 /*
1781 * if signal crosses either of the boundaries, invoke callback
1782 * with appropriate parameters
1783 */
1784 if (sig > ifmgd->rssi_max_thold &&
1785 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1786 ifmgd->last_ave_beacon_signal = sig;
1787 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1788 } else if (sig < ifmgd->rssi_min_thold &&
1789 (last_sig >= ifmgd->rssi_max_thold ||
1790 last_sig == 0)) {
1791 ifmgd->last_ave_beacon_signal = sig;
1792 drv_rssi_callback(local, RSSI_EVENT_LOW);
1793 }
1794 }
1795
17e4ec14 1796 if (bss_conf->cqm_rssi_thold &&
391a200a 1797 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1798 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1799 int sig = ifmgd->ave_beacon_signal / 16;
1800 int last_event = ifmgd->last_cqm_event_signal;
1801 int thold = bss_conf->cqm_rssi_thold;
1802 int hyst = bss_conf->cqm_rssi_hyst;
1803 if (sig < thold &&
1804 (last_event == 0 || sig < last_event - hyst)) {
1805 ifmgd->last_cqm_event_signal = sig;
1806 ieee80211_cqm_rssi_notify(
1807 &sdata->vif,
1808 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1809 GFP_KERNEL);
1810 } else if (sig > thold &&
1811 (last_event == 0 || sig > last_event + hyst)) {
1812 ifmgd->last_cqm_event_signal = sig;
1813 ieee80211_cqm_rssi_notify(
1814 &sdata->vif,
1815 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1816 GFP_KERNEL);
1817 }
1818 }
1819
b291ba11 1820 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1821#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1822 if (net_ratelimit()) {
1823 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1824 "to a received beacon\n", sdata->name);
92778180
JM		 1825 }
1826#endif
b291ba11 1827 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1828 mutex_lock(&local->iflist_mtx);
1829 ieee80211_recalc_ps(local, -1);
1830 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1831 }
1832
b291ba11
JB		 1833 /*
1834 * Push the beacon loss detection into the future since
1835 * we are processing a beacon from the AP just now.
1836 */
d3a910a8 1837 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1838
d91f36db
JB		 1839 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1840 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1841 len - baselen, &elems,
1842 care_about_ies, ncrc);
1843
1844 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1845 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1846 ifmgd->aid);
d91f36db 1847
d8ec4433 1848 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1849 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1850 true);
d91f36db 1851
4ced3f74 1852 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1853 elems.wmm_param_len);
1854 }
fe3fa827 1855
25c9c875 1856 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1857 if (directed_tim) {
572e0012
KV		 1858 if (local->hw.conf.dynamic_ps_timeout > 0) {
1859 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1860 ieee80211_hw_config(local,
1861 IEEE80211_CONF_CHANGE_PS);
1862 ieee80211_send_nullfunc(local, sdata, 0);
1863 } else {
1864 local->pspolling = true;
1865
1866 /*
1867 * Here is assumed that the driver will be
1868 * able to send ps-poll frame and receive a
1869 * response even though power save mode is
1870 * enabled, but some drivers might require
1871 * to disable power save here. This needs
1872 * to be investigated.
1873 */
1874 ieee80211_send_pspoll(local, sdata);
1875 }
a97b77b9
VN		 1876 }
1877 }
7a5158ef 1878
d8ec4433 1879 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1880 return;
1881 ifmgd->beacon_crc = ncrc;
d8ec4433 1882 ifmgd->beacon_crc_valid = true;
30196673 1883
7a5158ef
JB		 1884 if (elems.erp_info && elems.erp_info_len >= 1) {
1885 erp_valid = true;
1886 erp_value = elems.erp_info[0];
1887 } else {
1888 erp_valid = false;
50c4afb9 1889 }
7a5158ef
JB		 1890 changed |= ieee80211_handle_bss_capability(sdata,
1891 le16_to_cpu(mgmt->u.beacon.capab_info),
1892 erp_valid, erp_value);
f0706e82 1893
d3c990fb 1894
53d6f81c 1895 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1896 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1897 struct sta_info *sta;
1898 struct ieee80211_supported_band *sband;
1899 u16 ap_ht_cap_flags;
1900
1901 rcu_read_lock();
1902
abe60632 1903 sta = sta_info_get(sdata, bssid);
77fdaa12 1904 if (WARN_ON(!sta)) {
ae5eb026
JB		 1905 rcu_read_unlock();
1906 return;
1907 }
1908
1909 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1910
1911 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1912 elems.ht_cap_elem, &sta->sta.ht_cap);
1913
1914 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1915
1916 rcu_read_unlock();
1917
1918 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1919 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1920 }
1921
8b19e6ca 1922 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1923 if (elems.country_elem) {
a8302de9
VT		 1924 /* TODO: IBSS also needs this */
1925 if (elems.pwr_constr_elem)
1926 ieee80211_handle_pwr_constr(sdata,
1927 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1928 elems.pwr_constr_elem,
1929 elems.pwr_constr_elem_len);
3f2355cb
LR		 1930 }
1931
471b3efd 1932 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1933}
1934
1fa57d01
JB		 1935void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1936 struct sk_buff *skb)
f0706e82 1937{
77fdaa12 1938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1939 struct ieee80211_rx_status *rx_status;
f0706e82 1940 struct ieee80211_mgmt *mgmt;
77fdaa12 1941 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1942 u16 fc;
1943
f0706e82
JB		 1944 rx_status = (struct ieee80211_rx_status *) skb->cb;
1945 mgmt = (struct ieee80211_mgmt *) skb->data;
1946 fc = le16_to_cpu(mgmt->frame_control);
1947
77fdaa12
JB		 1948 mutex_lock(&ifmgd->mtx);
1949
1950 if (ifmgd->associated &&
0c1ad2ca 1951 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1952 switch (fc & IEEE80211_FCTL_STYPE) {
1953 case IEEE80211_STYPE_BEACON:
1954 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1955 rx_status);
1956 break;
1957 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1958 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1959 break;
1960 case IEEE80211_STYPE_DEAUTH:
63f170e0 1961 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1962 break;
1963 case IEEE80211_STYPE_DISASSOC:
1964 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1965 break;
1966 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1967 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1968 case WLAN_CATEGORY_SPECTRUM_MGMT:
1969 ieee80211_sta_process_chanswitch(sdata,
1970 &mgmt->u.action.u.chan_switch.sw_elem,
1971 (void *)ifmgd->associated->priv,
1972 rx_status->mactime);
1973 break;
1974 }
77fdaa12
JB		 1975 }
1976 mutex_unlock(&ifmgd->mtx);
1977
1978 switch (rma) {
1979 case RX_MGMT_NONE:
1980 /* no action */
1981 break;
1982 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1983 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1984 break;
1985 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1986 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1987 break;
1988 default:
1989 WARN(1, "unexpected: %d", rma);
1990 }
36b3a628 1991 return;
77fdaa12
JB		 1992 }
1993
77fdaa12
JB		 1994 mutex_unlock(&ifmgd->mtx);
1995
63f170e0 1996 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1997 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1998 struct ieee80211_local *local = sdata->local;
1999 struct ieee80211_work *wk;
2000
a1699b75 2001 mutex_lock(&local->mtx);
b054b747
JB		 2002 list_for_each_entry(wk, &local->work_list, list) {
2003 if (wk->sdata != sdata)
2004 continue;
2005
e5b900d2
JB		 2006 if (wk->type != IEEE80211_WORK_ASSOC &&
2007 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2008 continue;
2009
2010 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2011 continue;
2012 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2013 continue;
2014
2015 /*
2016 * Printing the message only here means we can't
2017 * spuriously print it, but it also means that it
2018 * won't be printed when the frame comes in before
2019 * we even tried to associate or in similar cases.
2020 *
2021 * Ultimately, I suspect cfg80211 should print the
2022 * messages instead.
2023 */
2024 printk(KERN_DEBUG
2025 "%s: deauthenticated from %pM (Reason: %u)\n",
2026 sdata->name, mgmt->bssid,
2027 le16_to_cpu(mgmt->u.deauth.reason_code));
2028
2029 list_del_rcu(&wk->list);
2030 free_work(wk);
2031 break;
2032 }
a1699b75 2033 mutex_unlock(&local->mtx);
f0706e82 2034
ce470613 2035 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2036 }
f0706e82
JB		 2037}
2038
9c6bd790 2039static void ieee80211_sta_timer(unsigned long data)
f0706e82 2040{
60f8b39c
JB		 2041 struct ieee80211_sub_if_data *sdata =
2042 (struct ieee80211_sub_if_data *) data;
46900298 2043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2044 struct ieee80211_local *local = sdata->local;
f0706e82 2045
5bb644a0
JB		 2046 if (local->quiescing) {
2047 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2048 return;
2049 }
2050
64592c8f 2051 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2052}
2053
04ac3c0e 2054static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2055 u8 *bssid, u8 reason)
04ac3c0e
FF		 2056{
2057 struct ieee80211_local *local = sdata->local;
2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2059
2060 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2061 IEEE80211_STA_BEACON_POLL);
2062
2063 ieee80211_set_disassoc(sdata, true, true);
2064 mutex_unlock(&ifmgd->mtx);
2065 mutex_lock(&local->mtx);
2066 ieee80211_recalc_idle(local);
2067 mutex_unlock(&local->mtx);
2068 /*
2069 * must be outside lock due to cfg80211,
2070 * but that's not a problem.
2071 */
2072 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2073 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2074 NULL, true);
2075 mutex_lock(&ifmgd->mtx);
2076}
2077
1fa57d01 2078void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2079{
9c6bd790 2080 struct ieee80211_local *local = sdata->local;
1fa57d01 2081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2082
77fdaa12
JB		 2083 /* then process the rest of the work */
2084 mutex_lock(&ifmgd->mtx);
2085
b291ba11
JB		 2086 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2087 IEEE80211_STA_CONNECTION_POLL) &&
2088 ifmgd->associated) {
a43abf29 2089 u8 bssid[ETH_ALEN];
72a8a3ed 2090 int max_tries;
a43abf29 2091
0c1ad2ca 2092 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2093
72a8a3ed 2094 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2095 max_tries = max_nullfunc_tries;
72a8a3ed 2096 else
180205bd 2097 max_tries = max_probe_tries;
72a8a3ed 2098
4e5ff376
FF		 2099 /* ACK received for nullfunc probing frame */
2100 if (!ifmgd->probe_send_count)
2101 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2102 else if (ifmgd->nullfunc_failed) {
2103 if (ifmgd->probe_send_count < max_tries) {
2104#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2105 wiphy_debug(local->hw.wiphy,
2106 "%s: No ack for nullfunc frame to"
bfc31df3 2107 " AP %pM, try %d/%i\n",
04ac3c0e 2108 sdata->name, bssid,
bfc31df3 2109 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2110#endif
2111 ieee80211_mgd_probe_ap_send(sdata);
2112 } else {
2113#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2114 wiphy_debug(local->hw.wiphy,
2115 "%s: No ack for nullfunc frame to"
2116 " AP %pM, disconnecting.\n",
c658e5db 2117 sdata->name, bssid);
04ac3c0e 2118#endif
95acac61
JB		 2119 ieee80211_sta_connection_lost(sdata, bssid,
2120 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2121 }
2122 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2123 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2124 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2125#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2126 wiphy_debug(local->hw.wiphy,
2127 "%s: Failed to send nullfunc to AP %pM"
2128 " after %dms, disconnecting.\n",
2129 sdata->name,
180205bd 2130 bssid, probe_wait_ms);
04ac3c0e 2131#endif
95acac61
JB		 2132 ieee80211_sta_connection_lost(sdata, bssid,
2133 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2134 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2135#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2136 wiphy_debug(local->hw.wiphy,
2137 "%s: No probe response from AP %pM"
bfc31df3 2138 " after %dms, try %d/%i\n",
b38afa87 2139 sdata->name,
180205bd 2140 bssid, probe_wait_ms,
bfc31df3 2141 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2142#endif
2143 ieee80211_mgd_probe_ap_send(sdata);
2144 } else {
b291ba11
JB		 2145 /*
2146 * We actually lost the connection ... or did we?
2147 * Let's make sure!
2148 */
b38afa87
BG		 2149 wiphy_debug(local->hw.wiphy,
2150 "%s: No probe response from AP %pM"
2151 " after %dms, disconnecting.\n",
2152 sdata->name,
180205bd 2153 bssid, probe_wait_ms);
04ac3c0e 2154
95acac61
JB		 2155 ieee80211_sta_connection_lost(sdata, bssid,
2156 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2157 }
2158 }
2159
77fdaa12 2160 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2161}
2162
b291ba11
JB		 2163static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2164{
2165 struct ieee80211_sub_if_data *sdata =
2166 (struct ieee80211_sub_if_data *) data;
2167 struct ieee80211_local *local = sdata->local;
2168
2169 if (local->quiescing)
2170 return;
2171
1e4dcd01
JO		 2172 ieee80211_queue_work(&sdata->local->hw,
2173 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2174}
2175
2176static void ieee80211_sta_conn_mon_timer(unsigned long data)
2177{
2178 struct ieee80211_sub_if_data *sdata =
2179 (struct ieee80211_sub_if_data *) data;
2180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2181 struct ieee80211_local *local = sdata->local;
2182
2183 if (local->quiescing)
2184 return;
2185
42935eca 2186 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2187}
2188
2189static void ieee80211_sta_monitor_work(struct work_struct *work)
2190{
2191 struct ieee80211_sub_if_data *sdata =
2192 container_of(work, struct ieee80211_sub_if_data,
2193 u.mgd.monitor_work);
2194
2195 ieee80211_mgd_probe_ap(sdata, false);
2196}
2197
9c6bd790
JB		 2198static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2199{
ad935687 2200 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2201 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2202 IEEE80211_STA_CONNECTION_POLL);
ad935687 2203
b291ba11 2204 /* let's probe the connection once */
42935eca 2205 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2206 &sdata->u.mgd.monitor_work);
2207 /* and do all the other regular work too */
64592c8f 2208 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2209 }
9c6bd790 2210}
f0706e82 2211
5bb644a0
JB		 2212#ifdef CONFIG_PM
2213void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2214{
2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2216
2217 /*
2218 * we need to use atomic bitops for the running bits
2219 * only because both timers might fire at the same
2220 * time -- the code here is properly synchronised.
2221 */
2222
d1f5b7a3
JB		 2223 cancel_work_sync(&ifmgd->request_smps_work);
2224
1e4dcd01 2225 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2226 if (del_timer_sync(&ifmgd->timer))
2227 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2228
2229 cancel_work_sync(&ifmgd->chswitch_work);
2230 if (del_timer_sync(&ifmgd->chswitch_timer))
2231 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2232
2233 cancel_work_sync(&ifmgd->monitor_work);
2234 /* these will just be re-established on connection */
2235 del_timer_sync(&ifmgd->conn_mon_timer);
2236 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2237}
2238
2239void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2240{
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242
676b58c2
RM		 2243 if (!ifmgd->associated)
2244 return;
2245
95acac61
JB		 2246 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2247 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2248 mutex_lock(&ifmgd->mtx);
2249 if (ifmgd->associated) {
2250#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2251 wiphy_debug(sdata->local->hw.wiphy,
2252 "%s: driver requested disconnect after resume.\n",
2253 sdata->name);
2254#endif
2255 ieee80211_sta_connection_lost(sdata,
2256 ifmgd->associated->bssid,
2257 WLAN_REASON_UNSPECIFIED);
2258 mutex_unlock(&ifmgd->mtx);
2259 return;
2260 }
2261 mutex_unlock(&ifmgd->mtx);
2262 }
2263
5bb644a0
JB		 2264 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2265 add_timer(&ifmgd->timer);
2266 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2267 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2268 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2269 ieee80211_restart_sta_timer(sdata);
a6af1d84 2270 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2271}
2272#endif
2273
9c6bd790
JB		 2274/* interface setup */
2275void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2276{
46900298 2277 struct ieee80211_if_managed *ifmgd;
988c0f72 2278
46900298 2279 ifmgd = &sdata->u.mgd;
b291ba11 2280 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2281 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2282 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2283 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2284 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2285 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2286 (unsigned long) sdata);
b291ba11
JB		 2287 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2288 (unsigned long) sdata);
2289 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2290 (unsigned long) sdata);
46900298 2291 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2292 (unsigned long) sdata);
9c6bd790 2293
ab1faead 2294 ifmgd->flags = 0;
bbbdff9e 2295
77fdaa12 2296 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2297
2298 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2299 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2300 else
2301 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2302}
2303
77fdaa12
JB		 2304/* scan finished notification */
2305void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2306{
77fdaa12 2307 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2308
77fdaa12
JB		 2309 /* Restart STA timers */
2310 rcu_read_lock();
2311 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2312 ieee80211_restart_sta_timer(sdata);
2313 rcu_read_unlock();
2314}
60f8b39c 2315
77fdaa12
JB		 2316int ieee80211_max_network_latency(struct notifier_block *nb,
2317 unsigned long data, void *dummy)
2318{
2319 s32 latency_usec = (s32) data;
2320 struct ieee80211_local *local =
2321 container_of(nb, struct ieee80211_local,
2322 network_latency_notifier);
1fa6f4af 2323
77fdaa12
JB		 2324 mutex_lock(&local->iflist_mtx);
2325 ieee80211_recalc_ps(local, latency_usec);
2326 mutex_unlock(&local->iflist_mtx);
dfe67012 2327
77fdaa12 2328 return 0;
9c6bd790
JB		 2329}
2330
77fdaa12 2331/* config hooks */
af6b6374
JB		 2332static enum work_done_result
2333ieee80211_probe_auth_done(struct ieee80211_work *wk,
2334 struct sk_buff *skb)
2335{
2336 if (!skb) {
2337 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2338 return WORK_DONE_DESTROY;
2339 }
2340
2341 if (wk->type == IEEE80211_WORK_AUTH) {
2342 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2343 return WORK_DONE_DESTROY;
2344 }
2345
2346 mutex_lock(&wk->sdata->u.mgd.mtx);
2347 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2348 mutex_unlock(&wk->sdata->u.mgd.mtx);
2349
2350 wk->type = IEEE80211_WORK_AUTH;
2351 wk->probe_auth.tries = 0;
2352 return WORK_DONE_REQUEUE;
2353}
2354
77fdaa12
JB		 2355int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2356 struct cfg80211_auth_request *req)
9c6bd790 2357{
77fdaa12 2358 const u8 *ssid;
f679f65d 2359 struct ieee80211_work *wk;
77fdaa12 2360 u16 auth_alg;
9c6bd790 2361
d5cdfacb
JM		 2362 if (req->local_state_change)
2363 return 0; /* no need to update mac80211 state */
2364
77fdaa12
JB		 2365 switch (req->auth_type) {
2366 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2367 auth_alg = WLAN_AUTH_OPEN;
2368 break;
2369 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2370 if (IS_ERR(sdata->local->wep_tx_tfm))
2371 return -EOPNOTSUPP;
77fdaa12
JB		 2372 auth_alg = WLAN_AUTH_SHARED_KEY;
2373 break;
2374 case NL80211_AUTHTYPE_FT:
2375 auth_alg = WLAN_AUTH_FT;
2376 break;
2377 case NL80211_AUTHTYPE_NETWORK_EAP:
2378 auth_alg = WLAN_AUTH_LEAP;
2379 break;
2380 default:
2381 return -EOPNOTSUPP;
60f8b39c 2382 }
77fdaa12
JB		 2383
2384 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2385 if (!wk)
9c6bd790 2386 return -ENOMEM;
77fdaa12 2387
5e124bd5 2388 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2389
2390 if (req->ie && req->ie_len) {
2391 memcpy(wk->ie, req->ie, req->ie_len);
2392 wk->ie_len = req->ie_len;
9c6bd790 2393 }
77fdaa12 2394
fffd0934 2395 if (req->key && req->key_len) {
af6b6374
JB		 2396 wk->probe_auth.key_len = req->key_len;
2397 wk->probe_auth.key_idx = req->key_idx;
2398 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2399 }
2400
77fdaa12 2401 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2402 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2403 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2404
af6b6374
JB		 2405 wk->probe_auth.algorithm = auth_alg;
2406 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2407
070bb547
JB		 2408 /* if we already have a probe, don't probe again */
2409 if (req->bss->proberesp_ies)
2410 wk->type = IEEE80211_WORK_AUTH;
2411 else
2412 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2413 wk->chan = req->bss->channel;
4d51e149 2414 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2415 wk->sdata = sdata;
2416 wk->done = ieee80211_probe_auth_done;
77fdaa12 2417
af6b6374 2418 ieee80211_add_work(wk);
9c6bd790 2419 return 0;
60f8b39c
JB		 2420}
2421
af6b6374
JB		 2422static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2423 struct sk_buff *skb)
2424{
2425 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2426 struct ieee80211_rx_status *rx_status;
2427 struct ieee802_11_elems elems;
af6b6374
JB		 2428 u16 status;
2429
2430 if (!skb) {
2431 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2432 return WORK_DONE_DESTROY;
2433 }
2434
e5b900d2
JB		 2435 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2436 mutex_lock(&wk->sdata->u.mgd.mtx);
2437 rx_status = (void *) skb->cb;
2438 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2439 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2440 &elems, true);
2441 mutex_unlock(&wk->sdata->u.mgd.mtx);
2442
2443 wk->type = IEEE80211_WORK_ASSOC;
2444 /* not really done yet */
2445 return WORK_DONE_REQUEUE;
2446 }
2447
af6b6374
JB		 2448 mgmt = (void *)skb->data;
2449 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2450
2451 if (status == WLAN_STATUS_SUCCESS) {
2452 mutex_lock(&wk->sdata->u.mgd.mtx);
2453 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2454 mutex_unlock(&wk->sdata->u.mgd.mtx);
2455 /* oops -- internal error -- send timeout for now */
2456 cfg80211_send_assoc_timeout(wk->sdata->dev,
2457 wk->filter_ta);
2458 return WORK_DONE_DESTROY;
2459 }
68542962
JO		 2460
2461 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2462 }
2463
2464 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2465 return WORK_DONE_DESTROY;
2466}
2467
77fdaa12
JB		 2468int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2469 struct cfg80211_assoc_request *req)
f0706e82 2470{
77fdaa12 2471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2472 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2473 struct ieee80211_work *wk;
63f170e0 2474 const u8 *ssid;
af6b6374 2475 int i;
f0706e82 2476
77fdaa12 2477 mutex_lock(&ifmgd->mtx);
af6b6374 2478 if (ifmgd->associated) {
9c87ba67
JM		 2479 if (!req->prev_bssid ||
2480 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2481 ETH_ALEN)) {
2482 /*
2483 * We are already associated and the request was not a
2484 * reassociation request from the current BSS, so
2485 * reject it.
2486 */
2487 mutex_unlock(&ifmgd->mtx);
2488 return -EALREADY;
2489 }
2490
2491 /* Trying to reassociate - clear previous association state */
53f73c09 2492 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2493 }
2494 mutex_unlock(&ifmgd->mtx);
77fdaa12 2495
63f170e0 2496 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2497 if (!wk)
2498 return -ENOMEM;
77fdaa12 2499
77fdaa12 2500 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2501 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2502
d8ec4433
JO		 2503 ifmgd->beacon_crc_valid = false;
2504
77fdaa12
JB		 2505 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2506 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2507 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2508 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2509 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2510
77fdaa12
JB		 2511
2512 if (req->ie && req->ie_len) {
2513 memcpy(wk->ie, req->ie, req->ie_len);
2514 wk->ie_len = req->ie_len;
2515 } else
2516 wk->ie_len = 0;
2517
0c1ad2ca 2518 wk->assoc.bss = req->bss;
f679f65d 2519
af6b6374 2520 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2521
af6b6374
JB		 2522 /* new association always uses requested smps mode */
2523 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2524 if (ifmgd->powersave)
2525 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2526 else
2527 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2528 } else
2529 ifmgd->ap_smps = ifmgd->req_smps;
2530
2531 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2532 /*
2533 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2534 * We still associate in non-HT mode (11a/b/g) if any one of these
2535 * ciphers is configured as pairwise.
2536 * We can set this to true for non-11n hardware, that'll be checked
2537 * separately along with the peer capabilities.
2538 */
af6b6374 2539 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2540 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2541 wk->assoc.wmm_used = bss->wmm_used;
2542 wk->assoc.supp_rates = bss->supp_rates;
2543 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2544 wk->assoc.ht_information_ie =
2545 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2546
ab13315a
KV		 2547 if (bss->wmm_used && bss->uapsd_supported &&
2548 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2549 wk->assoc.uapsd_used = true;
2550 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2551 } else {
2552 wk->assoc.uapsd_used = false;
2553 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2554 }
2555
63f170e0 2556 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2557 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2558 wk->assoc.ssid_len = ssid[1];
63f170e0 2559
77fdaa12 2560 if (req->prev_bssid)
f679f65d 2561 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2562
f679f65d 2563 wk->chan = req->bss->channel;
4d51e149 2564 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2565 wk->sdata = sdata;
2566 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2567 if (!bss->dtim_period &&
2568 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2569 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2570 else
2571 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2572
2573 if (req->use_mfp) {
2574 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2575 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2576 } else {
2577 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2578 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2579 }
2580
2581 if (req->crypto.control_port)
2582 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2583 else
2584 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2585
a621fa4d
JB		 2586 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2587 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2588
af6b6374
JB		 2589 ieee80211_add_work(wk);
2590 return 0;
f0706e82
JB		 2591}
2592
77fdaa12 2593int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2594 struct cfg80211_deauth_request *req,
2595 void *cookie)
f0706e82 2596{
af6b6374 2597 struct ieee80211_local *local = sdata->local;
46900298 2598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2599 struct ieee80211_work *wk;
05e48e8e
JM		 2600 u8 bssid[ETH_ALEN];
2601 bool assoc_bss = false;
f0706e82 2602
77fdaa12
JB		 2603 mutex_lock(&ifmgd->mtx);
2604
05e48e8e 2605 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2606 if (ifmgd->associated == req->bss) {
53f73c09 2607 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2608 mutex_unlock(&ifmgd->mtx);
05e48e8e 2609 assoc_bss = true;
af6b6374
JB		 2610 } else {
2611 bool not_auth_yet = false;
f0706e82 2612
a58ce43f 2613 mutex_unlock(&ifmgd->mtx);
a58ce43f 2614
a1699b75 2615 mutex_lock(&local->mtx);
af6b6374 2616 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2617 if (wk->sdata != sdata)
af6b6374 2618 continue;
29165e4c
JB		 2619
2620 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2621 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2622 wk->type != IEEE80211_WORK_ASSOC &&
2623 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2624 continue;
2625
af6b6374
JB		 2626 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2627 continue;
29165e4c
JB		 2628
2629 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2630 list_del_rcu(&wk->list);
af6b6374
JB		 2631 free_work(wk);
2632 break;
2633 }
a1699b75 2634 mutex_unlock(&local->mtx);
af6b6374
JB		 2635
2636 /*
2637 * If somebody requests authentication and we haven't
2638 * sent out an auth frame yet there's no need to send
2639 * out a deauth frame either. If the state was PROBE,
2640 * then this is the case. If it's AUTH we have sent a
2641 * frame, and if it's IDLE we have completed the auth
2642 * process already.
2643 */
2644 if (not_auth_yet) {
2645 __cfg80211_auth_canceled(sdata->dev, bssid);
2646 return 0;
2647 }
2648 }
77fdaa12 2649
0ff71613 2650 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2651 sdata->name, bssid, req->reason_code);
0ff71613 2652
d5cdfacb
JM		 2653 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2654 req->reason_code, cookie,
2655 !req->local_state_change);
05e48e8e
JM		 2656 if (assoc_bss)
2657 sta_info_destroy_addr(sdata, bssid);
f0706e82 2658
7da7cc1d 2659 mutex_lock(&sdata->local->mtx);
bc83b681 2660 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2661 mutex_unlock(&sdata->local->mtx);
bc83b681 2662
f0706e82
JB		 2663 return 0;
2664}
84363e6e 2665
77fdaa12 2666int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2667 struct cfg80211_disassoc_request *req,
2668 void *cookie)
9c6bd790 2669{
77fdaa12 2670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2671 u8 bssid[ETH_ALEN];
9c6bd790 2672
77fdaa12 2673 mutex_lock(&ifmgd->mtx);
10f644a4 2674
8d8b261a
JB		 2675 /*
2676 * cfg80211 should catch this ... but it's racy since
2677 * we can receive a disassoc frame, process it, hand it
2678 * to cfg80211 while that's in a locked section already
2679 * trying to tell us that the user wants to disconnect.
2680 */
0c1ad2ca 2681 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2682 mutex_unlock(&ifmgd->mtx);
2683 return -ENOLINK;
2684 }
2685
0ff71613 2686 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2687 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2688
e69e95db 2689 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2690 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2691
2692 mutex_unlock(&ifmgd->mtx);
10f644a4 2693
77fdaa12 2694 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2695 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2696 cookie, !req->local_state_change);
e69e95db 2697 sta_info_destroy_addr(sdata, bssid);
bc83b681 2698
7da7cc1d 2699 mutex_lock(&sdata->local->mtx);
bc83b681 2700 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2701 mutex_unlock(&sdata->local->mtx);
bc83b681 2702
10f644a4
JB		 2703 return 0;
2704}
026331c4 2705
a97c13c3
JO		 2706void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2707 enum nl80211_cqm_rssi_threshold_event rssi_event,
2708 gfp_t gfp)
2709{
2710 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2711
b5878a2d
JB		 2712 trace_api_cqm_rssi_notify(sdata, rssi_event);
2713
a97c13c3
JO		 2714 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2715}
2716EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2717
2718unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2719{
2720 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2721 return sdata->dev->operstate;
2722}
2723EXPORT_SYMBOL(ieee80211_get_operstate);
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