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carl9170: allow PSM if the 5 GHz band is selected
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
77fdaa12 163 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 164{
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_supported_band *sband;
d5522e03
JB		 167 struct sta_info *sta;
168 u32 changed = 0;
172710bf 169 int hti_cfreq;
9ed6bcce 170 u16 ht_opmode;
0aaffa9b
JB		 171 bool enable_ht = true;
172 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 173 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
174
175 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
176
0aaffa9b
JB		 177 prev_chantype = sdata->vif.bss_conf.channel_type;
178
d5522e03
JB		 179 /* HT is not supported */
180 if (!sband->ht_cap.ht_supported)
181 enable_ht = false;
182
172710bf
BG		 183 if (enable_ht) {
184 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
185 sband->band);
186 /* check that channel matches the right operating channel */
187 if (local->hw.conf.channel->center_freq != hti_cfreq) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
191 */
192 printk(KERN_DEBUG
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
197 sdata->name,
198 local->hw.conf.channel->center_freq,
199 hti_cfreq, hti->control_chan,
200 sband->band);
201 enable_ht = false;
202 }
203 }
d5522e03
JB		 204
205 if (enable_ht) {
206 channel_type = NL80211_CHAN_HT20;
207
208 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
209 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
210 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
211 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 213 if (!(local->hw.conf.channel->flags &
214 IEEE80211_CHAN_NO_HT40PLUS))
215 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 216 break;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 218 if (!(local->hw.conf.channel->flags &
219 IEEE80211_CHAN_NO_HT40MINUS))
220 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 221 break;
222 }
223 }
224 }
225
fe6f212c
RC		 226 if (local->tmp_channel)
227 local->tmp_channel_type = channel_type;
d5522e03 228
0aaffa9b
JB		 229 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type = NL80211_CHAN_HT20;
232 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
233 }
d5522e03 234
0aaffa9b
JB		 235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local, 0);
d5522e03 237
0aaffa9b 238 if (prev_chantype != channel_type) {
d5522e03 239 rcu_read_lock();
abe60632 240 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 241 if (sta)
242 rate_control_rate_update(local, sband, sta,
4fa00437 243 IEEE80211_RC_HT_CHANGED,
0aaffa9b 244 channel_type);
d5522e03 245 rcu_read_unlock();
0aaffa9b 246 }
d5522e03 247
9ed6bcce 248 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 249
250 /* if bss configuration changed store the new one */
0aaffa9b
JB		 251 if (sdata->ht_opmode_valid != enable_ht ||
252 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
253 prev_chantype != channel_type) {
d5522e03 254 changed |= BSS_CHANGED_HT;
9ed6bcce 255 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 256 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 257 }
258
259 return changed;
260}
261
9c6bd790
JB		 262/* frame sending functions */
263
ef422bc0 264static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 265 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 266 void *cookie, bool send_frame)
9ac19a90
JB		 267{
268 struct ieee80211_local *local = sdata->local;
46900298 269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 270 struct sk_buff *skb;
271 struct ieee80211_mgmt *mgmt;
9aed3cc1 272
65fc73ac 273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 274 if (!skb) {
ef422bc0 275 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 276 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 277 return;
278 }
279 skb_reserve(skb, local->hw.extra_tx_headroom);
280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
77fdaa12 283 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 284 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 285 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 286 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 287 skb_put(skb, 2);
ef422bc0 288 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 289 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
290
53b46b84 291 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 292 if (cookie)
293 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
294 else
295 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 296 else
ce470613
HS		 297 if (cookie)
298 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
299 else
300 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 301 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
302 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 303
304 if (send_frame)
305 ieee80211_tx_skb(sdata, skb);
306 else
307 kfree_skb(skb);
9ac19a90
JB		 308}
309
572e0012
KV		 310void ieee80211_send_pspoll(struct ieee80211_local *local,
311 struct ieee80211_sub_if_data *sdata)
312{
572e0012
KV		 313 struct ieee80211_pspoll *pspoll;
314 struct sk_buff *skb;
572e0012 315
d8cd189e
KV		 316 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
317 if (!skb)
572e0012 318 return;
572e0012 319
d8cd189e
KV		 320 pspoll = (struct ieee80211_pspoll *) skb->data;
321 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 322
62ae67be
JB		 323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
324 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 325}
326
965bedad
JB		 327void ieee80211_send_nullfunc(struct ieee80211_local *local,
328 struct ieee80211_sub_if_data *sdata,
329 int powersave)
330{
331 struct sk_buff *skb;
d8cd189e 332 struct ieee80211_hdr_3addr *nullfunc;
965bedad 333
d8cd189e
KV		 334 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
335 if (!skb)
965bedad 336 return;
965bedad 337
d8cd189e 338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 339 if (powersave)
d8cd189e 340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 341
62ae67be
JB		 342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
343 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 344}
345
d524215f
FF		 346static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
347 struct ieee80211_sub_if_data *sdata)
348{
349 struct sk_buff *skb;
350 struct ieee80211_hdr *nullfunc;
351 __le16 fc;
352
353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
354 return;
355
356 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
357 if (!skb) {
358 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
359 "nullfunc frame\n", sdata->name);
360 return;
361 }
362 skb_reserve(skb, local->hw.extra_tx_headroom);
363
364 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
365 memset(nullfunc, 0, 30);
366 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
367 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
368 nullfunc->frame_control = fc;
369 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
370 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
371 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
372 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
373
374 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
375 ieee80211_tx_skb(sdata, skb);
376}
377
cc32abd4
JB		 378/* spectrum management related things */
379static void ieee80211_chswitch_work(struct work_struct *work)
380{
381 struct ieee80211_sub_if_data *sdata =
382 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
384
9607e6b6 385 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 386 return;
387
77fdaa12
JB		 388 mutex_lock(&ifmgd->mtx);
389 if (!ifmgd->associated)
390 goto out;
cc32abd4
JB		 391
392 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 393 if (!sdata->local->ops->channel_switch) {
394 /* call "hw_config" only if doing sw channel switch */
395 ieee80211_hw_config(sdata->local,
396 IEEE80211_CONF_CHANGE_CHANNEL);
397 }
77fdaa12 398
cc32abd4 399 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 400 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 401
cc32abd4
JB		 402 ieee80211_wake_queues_by_reason(&sdata->local->hw,
403 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 404 out:
405 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
406 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 407}
408
5ce6e438
JB		 409void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
410{
411 struct ieee80211_sub_if_data *sdata;
412 struct ieee80211_if_managed *ifmgd;
413
414 sdata = vif_to_sdata(vif);
415 ifmgd = &sdata->u.mgd;
416
417 trace_api_chswitch_done(sdata, success);
418 if (!success) {
419 /*
420 * If the channel switch was not successful, stay
421 * around on the old channel. We currently lack
422 * good handling of this situation, possibly we
423 * should just drop the association.
424 */
425 sdata->local->csa_channel = sdata->local->oper_channel;
426 }
427
428 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
429}
430EXPORT_SYMBOL(ieee80211_chswitch_done);
431
cc32abd4
JB		 432static void ieee80211_chswitch_timer(unsigned long data)
433{
434 struct ieee80211_sub_if_data *sdata =
435 (struct ieee80211_sub_if_data *) data;
436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
437
5bb644a0
JB		 438 if (sdata->local->quiescing) {
439 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
440 return;
441 }
442
42935eca 443 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 444}
445
446void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
447 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 448 struct ieee80211_bss *bss,
449 u64 timestamp)
cc32abd4 450{
0c1ad2ca
JB		 451 struct cfg80211_bss *cbss =
452 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 453 struct ieee80211_channel *new_ch;
454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 455 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
456 cbss->channel->band);
cc32abd4 457
77fdaa12
JB		 458 ASSERT_MGD_MTX(ifmgd);
459
460 if (!ifmgd->associated)
cc32abd4
JB		 461 return;
462
fbe9c429 463 if (sdata->local->scanning)
cc32abd4
JB		 464 return;
465
466 /* Disregard subsequent beacons if we are already running a timer
467 processing a CSA */
468
469 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
470 return;
471
472 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
473 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
474 return;
475
476 sdata->local->csa_channel = new_ch;
477
5ce6e438
JB		 478 if (sdata->local->ops->channel_switch) {
479 /* use driver's channel switch callback */
480 struct ieee80211_channel_switch ch_switch;
481 memset(&ch_switch, 0, sizeof(ch_switch));
482 ch_switch.timestamp = timestamp;
483 if (sw_elem->mode) {
484 ch_switch.block_tx = true;
485 ieee80211_stop_queues_by_reason(&sdata->local->hw,
486 IEEE80211_QUEUE_STOP_REASON_CSA);
487 }
488 ch_switch.channel = new_ch;
489 ch_switch.count = sw_elem->count;
490 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
491 drv_channel_switch(sdata->local, &ch_switch);
492 return;
493 }
494
495 /* channel switch handled in software */
cc32abd4 496 if (sw_elem->count <= 1) {
42935eca 497 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 498 } else {
9feaddc7
WYG		 499 if (sw_elem->mode)
500 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 501 IEEE80211_QUEUE_STOP_REASON_CSA);
502 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
503 mod_timer(&ifmgd->chswitch_timer,
504 jiffies +
505 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 506 cbss->beacon_interval));
cc32abd4
JB		 507 }
508}
509
510static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
511 u16 capab_info, u8 *pwr_constr_elem,
512 u8 pwr_constr_elem_len)
513{
514 struct ieee80211_conf *conf = &sdata->local->hw.conf;
515
516 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
517 return;
518
519 /* Power constraint IE length should be 1 octet */
520 if (pwr_constr_elem_len != 1)
521 return;
522
523 if ((*pwr_constr_elem <= conf->channel->max_power) &&
524 (*pwr_constr_elem != sdata->local->power_constr_level)) {
525 sdata->local->power_constr_level = *pwr_constr_elem;
526 ieee80211_hw_config(sdata->local, 0);
527 }
528}
529
f90754c1
JO		 530void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
531{
532 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
533 struct ieee80211_local *local = sdata->local;
534 struct ieee80211_conf *conf = &local->hw.conf;
535
536 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
537 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
538 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
539
540 local->disable_dynamic_ps = false;
541 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
542}
543EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
544
545void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
546{
547 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
548 struct ieee80211_local *local = sdata->local;
549 struct ieee80211_conf *conf = &local->hw.conf;
550
551 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
552 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
553 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
554
555 local->disable_dynamic_ps = true;
556 conf->dynamic_ps_timeout = 0;
557 del_timer_sync(&local->dynamic_ps_timer);
558 ieee80211_queue_work(&local->hw,
559 &local->dynamic_ps_enable_work);
560}
561EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
562
965bedad
JB		 563/* powersave */
564static void ieee80211_enable_ps(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata)
566{
567 struct ieee80211_conf *conf = &local->hw.conf;
568
d5edaedc
JB		 569 /*
570 * If we are scanning right now then the parameters will
571 * take effect when scan finishes.
572 */
fbe9c429 573 if (local->scanning)
d5edaedc
JB		 574 return;
575
965bedad
JB		 576 if (conf->dynamic_ps_timeout > 0 &&
577 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
578 mod_timer(&local->dynamic_ps_timer, jiffies +
579 msecs_to_jiffies(conf->dynamic_ps_timeout));
580 } else {
581 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
582 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 583
2a13052f
JO		 584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
585 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
586 return;
587
588 conf->flags |= IEEE80211_CONF_PS;
589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 590 }
591}
592
593static void ieee80211_change_ps(struct ieee80211_local *local)
594{
595 struct ieee80211_conf *conf = &local->hw.conf;
596
597 if (local->ps_sdata) {
965bedad
JB		 598 ieee80211_enable_ps(local, local->ps_sdata);
599 } else if (conf->flags & IEEE80211_CONF_PS) {
600 conf->flags &= ~IEEE80211_CONF_PS;
601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 del_timer_sync(&local->dynamic_ps_timer);
603 cancel_work_sync(&local->dynamic_ps_enable_work);
604 }
605}
606
808118cb
JY		 607static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
608{
609 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
610 struct sta_info *sta = NULL;
611 u32 sta_flags = 0;
612
613 if (!mgd->powersave)
614 return false;
615
616 if (!mgd->associated)
617 return false;
618
619 if (!mgd->associated->beacon_ies)
620 return false;
621
622 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
623 IEEE80211_STA_CONNECTION_POLL))
624 return false;
625
626 rcu_read_lock();
627 sta = sta_info_get(sdata, mgd->bssid);
628 if (sta)
629 sta_flags = get_sta_flags(sta);
630 rcu_read_unlock();
631
632 if (!(sta_flags & WLAN_STA_AUTHORIZED))
633 return false;
634
635 return true;
636}
637
965bedad 638/* need to hold RTNL or interface lock */
10f644a4 639void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 640{
641 struct ieee80211_sub_if_data *sdata, *found = NULL;
642 int count = 0;
195e294d 643 int timeout;
965bedad
JB		 644
645 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
646 local->ps_sdata = NULL;
647 return;
648 }
649
af6b6374
JB		 650 if (!list_empty(&local->work_list)) {
651 local->ps_sdata = NULL;
652 goto change;
653 }
654
965bedad 655 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 656 if (!ieee80211_sdata_running(sdata))
965bedad 657 continue;
8c7914de
RM		 658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
659 /* If an AP vif is found, then disable PS
660 * by setting the count to zero thereby setting
661 * ps_sdata to NULL.
662 */
663 count = 0;
664 break;
665 }
965bedad
JB		 666 if (sdata->vif.type != NL80211_IFTYPE_STATION)
667 continue;
668 found = sdata;
669 count++;
670 }
671
808118cb 672 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 673 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 674 s32 beaconint_us;
675
676 if (latency < 0)
ed77134b 677 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 678
679 beaconint_us = ieee80211_tu_to_usec(
680 found->vif.bss_conf.beacon_int);
681
ff616381 682 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 683 if (timeout < 0) {
684 /*
ff616381
JO		 685 * Go to full PSM if the user configures a very low
686 * latency requirement.
0ab82b04
EP		 687 * The 2000 second value is there for compatibility
688 * until the PM_QOS_NETWORK_LATENCY is configured
689 * with real values.
195e294d 690 */
0ab82b04
EP		 691 if (latency > (1900 * USEC_PER_MSEC) &&
692 latency != (2000 * USEC_PER_SEC))
195e294d 693 timeout = 0;
ff616381
JO		 694 else
695 timeout = 100;
195e294d 696 }
f90754c1
JO		 697 local->dynamic_ps_user_timeout = timeout;
698 if (!local->disable_dynamic_ps)
699 conf->dynamic_ps_timeout =
700 local->dynamic_ps_user_timeout;
195e294d 701
04fe2037 702 if (beaconint_us > latency) {
10f644a4 703 local->ps_sdata = NULL;
04fe2037 704 } else {
56007a02 705 struct ieee80211_bss *bss;
04fe2037 706 int maxslp = 1;
56007a02 707 u8 dtimper;
04fe2037 708
56007a02
JB		 709 bss = (void *)found->u.mgd.associated->priv;
710 dtimper = bss->dtim_period;
711
712 /* If the TIM IE is invalid, pretend the value is 1 */
713 if (!dtimper)
714 dtimper = 1;
715 else if (dtimper > 1)
04fe2037
JB		 716 maxslp = min_t(int, dtimper,
717 latency / beaconint_us);
718
9ccebe61 719 local->hw.conf.max_sleep_period = maxslp;
56007a02 720 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 721 local->ps_sdata = found;
04fe2037 722 }
10f644a4 723 } else {
965bedad 724 local->ps_sdata = NULL;
10f644a4 725 }
965bedad 726
af6b6374 727 change:
965bedad
JB		 728 ieee80211_change_ps(local);
729}
730
731void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
732{
733 struct ieee80211_local *local =
734 container_of(work, struct ieee80211_local,
735 dynamic_ps_disable_work);
736
737 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
738 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
740 }
741
742 ieee80211_wake_queues_by_reason(&local->hw,
743 IEEE80211_QUEUE_STOP_REASON_PS);
744}
745
746void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
747{
748 struct ieee80211_local *local =
749 container_of(work, struct ieee80211_local,
750 dynamic_ps_enable_work);
751 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 752 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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
760 if (local->hw.conf.flags & IEEE80211_CONF_PS)
761 return;
762
77b7023a
AN		 763 if (!local->disable_dynamic_ps &&
764 local->hw.conf.dynamic_ps_timeout > 0) {
765 /* don't enter PS if TX frames are pending */
766 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 767 mod_timer(&local->dynamic_ps_timer, jiffies +
768 msecs_to_jiffies(
769 local->hw.conf.dynamic_ps_timeout));
770 return;
771 }
77b7023a
AN		 772
773 /*
774 * transmission can be stopped by others which leads to
775 * dynamic_ps_timer expiry. Postpone the ps timer if it
776 * is not the actual idle state.
777 */
778 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
779 for (q = 0; q < local->hw.queues; q++) {
780 if (local->queue_stop_reasons[q]) {
781 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
782 flags);
783 mod_timer(&local->dynamic_ps_timer, jiffies +
784 msecs_to_jiffies(
785 local->hw.conf.dynamic_ps_timeout));
786 return;
787 }
788 }
789 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 790 }
1ddc2867 791
375177bf 792 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 793 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
794 netif_tx_stop_all_queues(sdata->dev);
965bedad 795
e8306f98
VN		 796 if (drv_tx_frames_pending(local))
797 mod_timer(&local->dynamic_ps_timer, jiffies +
798 msecs_to_jiffies(
799 local->hw.conf.dynamic_ps_timeout));
800 else {
801 ieee80211_send_nullfunc(local, sdata, 1);
802 /* Flush to get the tx status of nullfunc frame */
803 drv_flush(local, false);
804 }
f3e85b9e
VN		 805 }
806
2a13052f
JO		 807 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
808 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 809 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
810 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
811 local->hw.conf.flags |= IEEE80211_CONF_PS;
812 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
813 }
f3e85b9e 814
77b7023a
AN		 815 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
816 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 817}
818
819void ieee80211_dynamic_ps_timer(unsigned long data)
820{
821 struct ieee80211_local *local = (void *) data;
822
78f1a8b7 823 if (local->quiescing || local->suspended)
5bb644a0
JB		 824 return;
825
42935eca 826 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 827}
828
60f8b39c 829/* MLME */
f698d856 830static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 831 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 832 u8 *wmm_param, size_t wmm_param_len)
833{
f0706e82 834 struct ieee80211_tx_queue_params params;
4ced3f74 835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 836 size_t left;
837 int count;
ab13315a 838 u8 *pos, uapsd_queues = 0;
f0706e82 839
e1b3ec1a
SG		 840 if (!local->ops->conf_tx)
841 return;
842
af6b6374 843 if (local->hw.queues < 4)
3434fbd3
JB		 844 return;
845
846 if (!wmm_param)
847 return;
848
f0706e82
JB		 849 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
850 return;
ab13315a
KV		 851
852 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 853 uapsd_queues = local->uapsd_queues;
ab13315a 854
f0706e82 855 count = wmm_param[6] & 0x0f;
46900298 856 if (count == ifmgd->wmm_last_param_set)
f0706e82 857 return;
46900298 858 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 859
860 pos = wmm_param + 8;
861 left = wmm_param_len - 8;
862
863 memset(&params, 0, sizeof(params));
864
f0706e82
JB		 865 local->wmm_acm = 0;
866 for (; left >= 4; left -= 4, pos += 4) {
867 int aci = (pos[0] >> 5) & 0x03;
868 int acm = (pos[0] >> 4) & 0x01;
ab13315a 869 bool uapsd = false;
f0706e82
JB		 870 int queue;
871
872 switch (aci) {
0eeb59fe 873 case 1: /* AC_BK */
e100bb64 874 queue = 3;
988c0f72 875 if (acm)
0eeb59fe 876 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 877 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
878 uapsd = true;
f0706e82 879 break;
0eeb59fe 880 case 2: /* AC_VI */
e100bb64 881 queue = 1;
988c0f72 882 if (acm)
0eeb59fe 883 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 884 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
885 uapsd = true;
f0706e82 886 break;
0eeb59fe 887 case 3: /* AC_VO */
e100bb64 888 queue = 0;
988c0f72 889 if (acm)
0eeb59fe 890 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 891 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
892 uapsd = true;
f0706e82 893 break;
0eeb59fe 894 case 0: /* AC_BE */
f0706e82 895 default:
e100bb64 896 queue = 2;
988c0f72 897 if (acm)
0eeb59fe 898 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 899 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
900 uapsd = true;
f0706e82
JB		 901 break;
902 }
903
904 params.aifs = pos[0] & 0x0f;
905 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
906 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 907 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 908 params.uapsd = uapsd;
909
f4ea83dd 910#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 911 wiphy_debug(local->hw.wiphy,
912 "WMM queue=%d aci=%d acm=%d aifs=%d "
913 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
914 queue, aci, acm,
915 params.aifs, params.cw_min, params.cw_max,
916 params.txop, params.uapsd);
3330d7be 917#endif
e1b3ec1a 918 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 919 wiphy_debug(local->hw.wiphy,
920 "failed to set TX queue parameters for queue %d\n",
921 queue);
f0706e82 922 }
e1b3ec1a
SG		 923
924 /* enable WMM or activate new settings */
4ced3f74
JB		 925 sdata->vif.bss_conf.qos = true;
926 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 927}
928
7a5158ef
JB		 929static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
930 u16 capab, bool erp_valid, u8 erp)
5628221c 931{
bda3933a 932 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 933 u32 changed = 0;
7a5158ef
JB		 934 bool use_protection;
935 bool use_short_preamble;
936 bool use_short_slot;
937
938 if (erp_valid) {
939 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
940 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
941 } else {
942 use_protection = false;
943 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
944 }
945
946 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 947 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
948 use_short_slot = true;
5628221c 949
471b3efd 950 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 951 bss_conf->use_cts_prot = use_protection;
952 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 953 }
7e9ed188 954
d43c7b37 955 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 956 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 957 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 958 }
d9430a32 959
7a5158ef 960 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 961 bss_conf->use_short_slot = use_short_slot;
962 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 963 }
964
965 return changed;
966}
967
f698d856 968static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 969 struct cfg80211_bss *cbss,
ae5eb026 970 u32 bss_info_changed)
f0706e82 971{
0c1ad2ca 972 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 973 struct ieee80211_local *local = sdata->local;
68542962 974 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 975
ae5eb026 976 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 977 /* set timing information */
68542962
JO		 978 bss_conf->beacon_int = cbss->beacon_interval;
979 bss_conf->timestamp = cbss->tsf;
5628221c 980
77fdaa12
JB		 981 bss_info_changed |= BSS_CHANGED_BEACON_INT;
982 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 983 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 984
7ccc8bd7
FF		 985 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
986 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
987
0c1ad2ca
JB		 988 sdata->u.mgd.associated = cbss;
989 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 990
17e4ec14
JM		 991 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
992
b291ba11
JB		 993 /* just to be sure */
994 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
995 IEEE80211_STA_BEACON_POLL);
996
9ac19a90 997 ieee80211_led_assoc(local, 1);
9306102e 998
e5b900d2
JB		 999 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1000 bss_conf->dtim_period = bss->dtim_period;
1001 else
1002 bss_conf->dtim_period = 0;
1003
68542962 1004 bss_conf->assoc = 1;
96dd22ac
JB		 1005 /*
1006 * For now just always ask the driver to update the basic rateset
1007 * when we have associated, we aren't checking whether it actually
1008 * changed or not.
1009 */
ae5eb026 1010 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1011
1012 /* And the BSSID changed - we're associated now */
1013 bss_info_changed |= BSS_CHANGED_BSSID;
1014
a97c13c3
JO		 1015 /* Tell the driver to monitor connection quality (if supported) */
1016 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1017 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1018 bss_info_changed |= BSS_CHANGED_CQM;
1019
68542962
JO		 1020 /* Enable ARP filtering */
1021 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1022 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1023 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1024 }
1025
ae5eb026 1026 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1027
056508dc
JB		 1028 mutex_lock(&local->iflist_mtx);
1029 ieee80211_recalc_ps(local, -1);
025e6be2 1030 ieee80211_recalc_smps(local);
056508dc 1031 mutex_unlock(&local->iflist_mtx);
e0cb686f 1032
8a5b33f5 1033 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1034 netif_carrier_on(sdata->dev);
f0706e82
JB		 1035}
1036
e69e95db 1037static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1038 bool remove_sta, bool tx)
aa458d17 1039{
46900298 1040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1041 struct ieee80211_local *local = sdata->local;
1042 struct sta_info *sta;
e0cb686f 1043 u32 changed = 0, config_changed = 0;
b291ba11 1044 u8 bssid[ETH_ALEN];
aa458d17 1045
77fdaa12
JB		 1046 ASSERT_MGD_MTX(ifmgd);
1047
b291ba11
JB		 1048 if (WARN_ON(!ifmgd->associated))
1049 return;
1050
0c1ad2ca 1051 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1052
77fdaa12
JB		 1053 ifmgd->associated = NULL;
1054 memset(ifmgd->bssid, 0, ETH_ALEN);
1055
1056 /*
1057 * we need to commit the associated = NULL change because the
1058 * scan code uses that to determine whether this iface should
1059 * go to/wake up from powersave or not -- and could otherwise
1060 * wake the queues erroneously.
1061 */
1062 smp_mb();
1063
1064 /*
1065 * Thus, we can only afterwards stop the queues -- to account
1066 * for the case where another CPU is finishing a scan at this
1067 * time -- we don't want the scan code to enable queues.
1068 */
aa458d17 1069
8a5b33f5 1070 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1071 netif_carrier_off(sdata->dev);
1072
2a419056 1073 mutex_lock(&local->sta_mtx);
abe60632 1074 sta = sta_info_get(sdata, bssid);
4cad6c7c 1075 if (sta) {
2a419056 1076 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1077 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1078 }
2a419056 1079 mutex_unlock(&local->sta_mtx);
aa458d17 1080
f5e5bf25
TW		 1081 changed |= ieee80211_reset_erp_info(sdata);
1082
f5e5bf25 1083 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1084 changed |= BSS_CHANGED_ASSOC;
1085 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1086
aa837e1d
JB		 1087 ieee80211_set_wmm_default(sdata);
1088
4797938c 1089 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1090 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1091
413ad50a
JB		 1092 /* on the next assoc, re-program HT parameters */
1093 sdata->ht_opmode_valid = false;
1094
a8302de9
VT		 1095 local->power_constr_level = 0;
1096
520eb820
KV		 1097 del_timer_sync(&local->dynamic_ps_timer);
1098 cancel_work_sync(&local->dynamic_ps_enable_work);
1099
e0cb686f
KV		 1100 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1101 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1102 config_changed |= IEEE80211_CONF_CHANGE_PS;
1103 }
a331400b 1104 local->ps_sdata = NULL;
ae5eb026 1105
e0cb686f 1106 ieee80211_hw_config(local, config_changed);
9cef8737 1107
68542962
JO		 1108 /* Disable ARP filtering */
1109 if (sdata->vif.bss_conf.arp_filter_enabled) {
1110 sdata->vif.bss_conf.arp_filter_enabled = false;
1111 changed |= BSS_CHANGED_ARP_FILTER;
1112 }
1113
0aaffa9b
JB		 1114 /* The BSSID (not really interesting) and HT changed */
1115 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1116 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1117
e69e95db
JM		 1118 if (remove_sta)
1119 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1120
1121 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1122 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1123 del_timer_sync(&sdata->u.mgd.timer);
1124 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1125}
f0706e82 1126
3cf335d5
KV		 1127void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1128 struct ieee80211_hdr *hdr)
1129{
1130 /*
1131 * We can postpone the mgd.timer whenever receiving unicast frames
1132 * from AP because we know that the connection is working both ways
1133 * at that time. But multicast frames (and hence also beacons) must
1134 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1135 * data idle periods for sending the periodic probe request to the
1136 * AP we're connected to.
3cf335d5 1137 */
b291ba11
JB		 1138 if (is_multicast_ether_addr(hdr->addr1))
1139 return;
1140
be099e82 1141 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1142}
f0706e82 1143
4e5ff376
FF		 1144static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1145{
1146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1147
1148 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1149 IEEE80211_STA_CONNECTION_POLL)))
1150 return;
1151
1152 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1153 IEEE80211_STA_BEACON_POLL);
1154 mutex_lock(&sdata->local->iflist_mtx);
1155 ieee80211_recalc_ps(sdata->local, -1);
1156 mutex_unlock(&sdata->local->iflist_mtx);
1157
1158 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1159 return;
1160
1161 /*
1162 * We've received a probe response, but are not sure whether
1163 * we have or will be receiving any beacons or data, so let's
1164 * schedule the timers again, just in case.
1165 */
1166 ieee80211_sta_reset_beacon_monitor(sdata);
1167
1168 mod_timer(&ifmgd->conn_mon_timer,
1169 round_jiffies_up(jiffies +
1170 IEEE80211_CONNECTION_IDLE_TIME));
1171}
1172
1173void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1174 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1175{
75706d0e 1176 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1177 return;
1178
04ac3c0e
FF		 1179 if (ack)
1180 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1181
1182 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1183 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1184 if (ack)
1185 sdata->u.mgd.probe_send_count = 0;
1186 else
1187 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1188 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1189 }
1190}
1191
a43abf29
ML		 1192static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1193{
1194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1195 const u8 *ssid;
f01a067d 1196 u8 *dst = ifmgd->associated->bssid;
180205bd 1197 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1198
1199 /*
1200 * Try sending broadcast probe requests for the last three
1201 * probe requests after the first ones failed since some
1202 * buggy APs only support broadcast probe requests.
1203 */
1204 if (ifmgd->probe_send_count >= unicast_limit)
1205 dst = NULL;
a43abf29 1206
4e5ff376
FF		 1207 /*
1208 * When the hardware reports an accurate Tx ACK status, it's
1209 * better to send a nullfunc frame instead of a probe request,
1210 * as it will kick us off the AP quickly if we aren't associated
1211 * anymore. The timeout will be reset if the frame is ACKed by
1212 * the AP.
1213 */
04ac3c0e
FF		 1214 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1215 ifmgd->nullfunc_failed = false;
4e5ff376 1216 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1217 } else {
4e5ff376 1218 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558
PS		 1219 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
1220 true);
4e5ff376 1221 }
a43abf29
ML		 1222
1223 ifmgd->probe_send_count++;
180205bd 1224 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1225 run_again(ifmgd, ifmgd->probe_timeout);
1226}
1227
b291ba11
JB		 1228static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1229 bool beacon)
04de8381 1230{
04de8381 1231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1232 bool already = false;
34bfc411 1233
9607e6b6 1234 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1235 return;
1236
91a3bd76
LR		 1237 if (sdata->local->scanning)
1238 return;
1239
b8bc4b0a
JB		 1240 if (sdata->local->tmp_channel)
1241 return;
1242
77fdaa12
JB		 1243 mutex_lock(&ifmgd->mtx);
1244
1245 if (!ifmgd->associated)
1246 goto out;
1247
a860402d 1248#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1249 if (beacon && net_ratelimit())
1250 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1251 "- sending probe request\n", sdata->name);
a860402d 1252#endif
04de8381 1253
b291ba11
JB		 1254 /*
1255 * The driver/our work has already reported this event or the
1256 * connection monitoring has kicked in and we have already sent
1257 * a probe request. Or maybe the AP died and the driver keeps
1258 * reporting until we disassociate...
1259 *
1260 * In either case we have to ignore the current call to this
1261 * function (except for setting the correct probe reason bit)
1262 * because otherwise we would reset the timer every time and
1263 * never check whether we received a probe response!
1264 */
1265 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1266 IEEE80211_STA_CONNECTION_POLL))
1267 already = true;
1268
1269 if (beacon)
1270 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1271 else
1272 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1273
1274 if (already)
1275 goto out;
1276
4e751843
JB		 1277 mutex_lock(&sdata->local->iflist_mtx);
1278 ieee80211_recalc_ps(sdata->local, -1);
1279 mutex_unlock(&sdata->local->iflist_mtx);
1280
a43abf29
ML		 1281 ifmgd->probe_send_count = 0;
1282 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1283 out:
1284 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1285}
1286
a619a4c0
JO		 1287struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1288 struct ieee80211_vif *vif)
1289{
1290 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1292 struct sk_buff *skb;
1293 const u8 *ssid;
1294
1295 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1296 return NULL;
1297
1298 ASSERT_MGD_MTX(ifmgd);
1299
1300 if (!ifmgd->associated)
1301 return NULL;
1302
1303 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1304 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
a806c558 1305 ssid + 2, ssid[1], NULL, 0, true);
a619a4c0
JO		 1306
1307 return skb;
1308}
1309EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1310
1e4dcd01
JO		 1311static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1312{
1313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1314 struct ieee80211_local *local = sdata->local;
1315 u8 bssid[ETH_ALEN];
1316
1317 mutex_lock(&ifmgd->mtx);
1318 if (!ifmgd->associated) {
1319 mutex_unlock(&ifmgd->mtx);
1320 return;
1321 }
1322
1323 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1324
180205bd
BG		 1325 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1326 sdata->name, bssid);
1e4dcd01 1327
53f73c09 1328 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1329 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1330
1331 mutex_lock(&local->mtx);
1332 ieee80211_recalc_idle(local);
1333 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1334 /*
1335 * must be outside lock due to cfg80211,
1336 * but that's not a problem.
1337 */
1338 ieee80211_send_deauth_disassoc(sdata, bssid,
1339 IEEE80211_STYPE_DEAUTH,
1340 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1341 NULL, true);
1e4dcd01
JO		 1342}
1343
1344void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1345{
1346 struct ieee80211_sub_if_data *sdata =
1347 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1348 u.mgd.beacon_connection_loss_work);
b291ba11 1349
1e4dcd01
JO		 1350 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1351 __ieee80211_connection_loss(sdata);
1352 else
1353 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1354}
1355
04de8381
KV		 1356void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1357{
1358 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1359 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1360
b5878a2d
JB		 1361 trace_api_beacon_loss(sdata);
1362
1e4dcd01
JO		 1363 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1364 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1365}
1366EXPORT_SYMBOL(ieee80211_beacon_loss);
1367
1e4dcd01
JO		 1368void ieee80211_connection_loss(struct ieee80211_vif *vif)
1369{
1370 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1371 struct ieee80211_hw *hw = &sdata->local->hw;
1372
b5878a2d
JB		 1373 trace_api_connection_loss(sdata);
1374
1e4dcd01
JO		 1375 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1376 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1377}
1378EXPORT_SYMBOL(ieee80211_connection_loss);
1379
1380
77fdaa12
JB		 1381static enum rx_mgmt_action __must_check
1382ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1383 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1384{
46900298 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1386 const u8 *bssid = NULL;
f0706e82
JB		 1387 u16 reason_code;
1388
f4ea83dd 1389 if (len < 24 + 2)
77fdaa12 1390 return RX_MGMT_NONE;
f0706e82 1391
77fdaa12
JB		 1392 ASSERT_MGD_MTX(ifmgd);
1393
0c1ad2ca 1394 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1395
1396 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1397
77fdaa12 1398 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1399 sdata->name, bssid, reason_code);
77fdaa12 1400
53f73c09 1401 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1402 mutex_lock(&sdata->local->mtx);
63f170e0 1403 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1404 mutex_unlock(&sdata->local->mtx);
f0706e82 1405
77fdaa12 1406 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1407}
1408
1409
77fdaa12
JB		 1410static enum rx_mgmt_action __must_check
1411ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1413{
46900298 1414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1415 u16 reason_code;
1416
f4ea83dd 1417 if (len < 24 + 2)
77fdaa12 1418 return RX_MGMT_NONE;
f0706e82 1419
77fdaa12
JB		 1420 ASSERT_MGD_MTX(ifmgd);
1421
1422 if (WARN_ON(!ifmgd->associated))
1423 return RX_MGMT_NONE;
1424
0c1ad2ca 1425 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1426 return RX_MGMT_NONE;
f0706e82
JB		 1427
1428 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1429
0ff71613 1430 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1431 sdata->name, mgmt->sa, reason_code);
f0706e82 1432
53f73c09 1433 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1434 mutex_lock(&sdata->local->mtx);
bc83b681 1435 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1436 mutex_unlock(&sdata->local->mtx);
77fdaa12 1437 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1438}
1439
1440
af6b6374
JB		 1441static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1442 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1443{
af6b6374 1444 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1446 struct ieee80211_local *local = sdata->local;
8318d78a 1447 struct ieee80211_supported_band *sband;
f0706e82 1448 struct sta_info *sta;
0c1ad2ca 1449 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1450 u8 *pos;
881d948c 1451 u32 rates, basic_rates;
af6b6374 1452 u16 capab_info, aid;
f0706e82 1453 struct ieee802_11_elems elems;
bda3933a 1454 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1455 u32 changed = 0;
5d1ec85f
JB		 1456 int i, j, err;
1457 bool have_higher_than_11mbit = false;
ae5eb026 1458 u16 ap_ht_cap_flags;
f0706e82 1459
af6b6374 1460 /* AssocResp and ReassocResp have identical structure */
f0706e82 1461
f0706e82 1462 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1463 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1464
1dd84aa2
JB		 1465 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1466 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1467 "set\n", sdata->name, aid);
1dd84aa2
JB		 1468 aid &= ~(BIT(15) | BIT(14));
1469
af6b6374
JB		 1470 pos = mgmt->u.assoc_resp.variable;
1471 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1472
f0706e82
JB		 1473 if (!elems.supp_rates) {
1474 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1475 sdata->name);
af6b6374 1476 return false;
f0706e82
JB		 1477 }
1478
46900298 1479 ifmgd->aid = aid;
f0706e82 1480
0c1ad2ca 1481 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1482 if (!sta) {
5d1ec85f
JB		 1483 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1484 " the AP\n", sdata->name);
af6b6374 1485 return false;
77fdaa12 1486 }
05e5e883 1487
5d1ec85f
JB		 1488 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1489 WLAN_STA_ASSOC_AP);
1490 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1491 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1492
60f8b39c
JB		 1493 rates = 0;
1494 basic_rates = 0;
e7480bbb 1495 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1496
60f8b39c
JB		 1497 for (i = 0; i < elems.supp_rates_len; i++) {
1498 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1499 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1500
60f8b39c
JB		 1501 if (rate > 110)
1502 have_higher_than_11mbit = true;
1503
1504 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1505 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1506 rates |= BIT(j);
d61272cb
TW		 1507 if (is_basic)
1508 basic_rates |= BIT(j);
1509 break;
1510 }
f709fc69 1511 }
f709fc69
LCC		 1512 }
1513
60f8b39c
JB		 1514 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1515 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1516 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1517
60f8b39c
JB		 1518 if (rate > 110)
1519 have_higher_than_11mbit = true;
f0706e82 1520
60f8b39c 1521 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1522 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1523 rates |= BIT(j);
d61272cb
TW		 1524 if (is_basic)
1525 basic_rates |= BIT(j);
1526 break;
1527 }
60f8b39c 1528 }
1ebebea8 1529 }
f0706e82 1530
e7480bbb 1531 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1532 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1533
1534 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1535 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1536 have_higher_than_11mbit)
1537 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1538 else
1539 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1540
ab1faead 1541 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1542 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1543 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1544
1545 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1546
4b7679a5 1547 rate_control_rate_init(sta);
f0706e82 1548
46900298 1549 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1550 set_sta_flags(sta, WLAN_STA_MFP);
1551
ddf4ac53 1552 if (elems.wmm_param)
60f8b39c 1553 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1554
5d1ec85f
JB		 1555 err = sta_info_insert(sta);
1556 sta = NULL;
1557 if (err) {
1558 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1559 " the AP (error %d)\n", sdata->name, err);
90be561b 1560 return false;
ddf4ac53
JB		 1561 }
1562
f2176d72
JO		 1563 /*
1564 * Always handle WMM once after association regardless
1565 * of the first value the AP uses. Setting -1 here has
1566 * that effect because the AP values is an unsigned
1567 * 4-bit value.
1568 */
1569 ifmgd->wmm_last_param_set = -1;
1570
ddf4ac53 1571 if (elems.wmm_param)
4ced3f74 1572 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1573 elems.wmm_param_len);
aa837e1d
JB		 1574 else
1575 ieee80211_set_wmm_default(sdata);
f0706e82 1576
e4da8c37
JB		 1577 local->oper_channel = wk->chan;
1578
ae5eb026 1579 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1580 (sdata->local->hw.queues >= 4) &&
ab1faead 1581 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1582 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1583 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1584
60f8b39c
JB		 1585 /* set AID and assoc capability,
1586 * ieee80211_set_associated() will tell the driver */
1587 bss_conf->aid = aid;
1588 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1589 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1590
d524215f
FF		 1591 /*
1592 * If we're using 4-addr mode, let the AP know that we're
1593 * doing so, so that it can create the STA VLAN on its side
1594 */
1595 if (ifmgd->use_4addr)
1596 ieee80211_send_4addr_nullfunc(local, sdata);
1597
15b7b062 1598 /*
b291ba11
JB		 1599 * Start timer to probe the connection to the AP now.
1600 * Also start the timer that will detect beacon loss.
15b7b062 1601 */
b291ba11 1602 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1603 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1604
af6b6374 1605 return true;
f0706e82
JB		 1606}
1607
1608
98c8fccf
JB		 1609static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1610 struct ieee80211_mgmt *mgmt,
1611 size_t len,
1612 struct ieee80211_rx_status *rx_status,
1613 struct ieee802_11_elems *elems,
1614 bool beacon)
1615{
1616 struct ieee80211_local *local = sdata->local;
1617 int freq;
c2b13452 1618 struct ieee80211_bss *bss;
98c8fccf 1619 struct ieee80211_channel *channel;
56007a02
JB		 1620 bool need_ps = false;
1621
1622 if (sdata->u.mgd.associated) {
1623 bss = (void *)sdata->u.mgd.associated->priv;
1624 /* not previously set so we may need to recalc */
1625 need_ps = !bss->dtim_period;
1626 }
98c8fccf
JB		 1627
1628 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1629 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1630 rx_status->band);
98c8fccf
JB		 1631 else
1632 freq = rx_status->freq;
1633
1634 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1635
1636 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1637 return;
1638
98c8fccf 1639 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1640 channel, beacon);
77fdaa12
JB		 1641 if (bss)
1642 ieee80211_rx_bss_put(local, bss);
1643
1644 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1645 return;
1646
56007a02
JB		 1647 if (need_ps) {
1648 mutex_lock(&local->iflist_mtx);
1649 ieee80211_recalc_ps(local, -1);
1650 mutex_unlock(&local->iflist_mtx);
1651 }
1652
c481ec97 1653 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1654 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1655 ETH_ALEN) == 0)) {
c481ec97
S		 1656 struct ieee80211_channel_sw_ie *sw_elem =
1657 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1658 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1659 bss, rx_status->mactime);
c481ec97 1660 }
f0706e82
JB		 1661}
1662
1663
f698d856 1664static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1665 struct sk_buff *skb)
f0706e82 1666{
af6b6374 1667 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1668 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1669 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1670 size_t baselen, len = skb->len;
ae6a44e3
EK		 1671 struct ieee802_11_elems elems;
1672
15b7b062
KV		 1673 ifmgd = &sdata->u.mgd;
1674
77fdaa12
JB		 1675 ASSERT_MGD_MTX(ifmgd);
1676
47846c9b 1677 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1678 return; /* ignore ProbeResp to foreign address */
1679
ae6a44e3
EK		 1680 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1681 if (baselen > len)
1682 return;
1683
1684 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1685 &elems);
1686
98c8fccf 1687 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1688
77fdaa12 1689 if (ifmgd->associated &&
4e5ff376
FF		 1690 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1691 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1692}
1693
d91f36db
JB		 1694/*
1695 * This is the canonical list of information elements we care about,
1696 * the filter code also gives us all changes to the Microsoft OUI
1697 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1698 *
1699 * We implement beacon filtering in software since that means we can
1700 * avoid processing the frame here and in cfg80211, and userspace
1701 * will not be able to tell whether the hardware supports it or not.
1702 *
1703 * XXX: This list needs to be dynamic -- userspace needs to be able to
1704 * add items it requires. It also needs to be able to tell us to
1705 * look out for other vendor IEs.
1706 */
1707static const u64 care_about_ies =
1d4df3a5
JB		 1708 (1ULL << WLAN_EID_COUNTRY) |
1709 (1ULL << WLAN_EID_ERP_INFO) |
1710 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1711 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1712 (1ULL << WLAN_EID_HT_CAPABILITY) |
1713 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1714
f698d856 1715static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1716 struct ieee80211_mgmt *mgmt,
1717 size_t len,
1718 struct ieee80211_rx_status *rx_status)
1719{
d91f36db 1720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1721 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1722 size_t baselen;
1723 struct ieee802_11_elems elems;
f698d856 1724 struct ieee80211_local *local = sdata->local;
471b3efd 1725 u32 changed = 0;
d91f36db 1726 bool erp_valid, directed_tim = false;
7a5158ef 1727 u8 erp_value = 0;
d91f36db 1728 u32 ncrc;
77fdaa12
JB		 1729 u8 *bssid;
1730
1731 ASSERT_MGD_MTX(ifmgd);
f0706e82 1732
ae6a44e3
EK		 1733 /* Process beacon from the current BSS */
1734 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1735 if (baselen > len)
1736 return;
1737
d91f36db 1738 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1739 return;
f0706e82 1740
b291ba11
JB		 1741 /*
1742 * We might have received a number of frames, among them a
1743 * disassoc frame and a beacon...
1744 */
1745 if (!ifmgd->associated)
77fdaa12
JB		 1746 return;
1747
0c1ad2ca 1748 bssid = ifmgd->associated->bssid;
77fdaa12 1749
b291ba11
JB		 1750 /*
1751 * And in theory even frames from a different AP we were just
1752 * associated to a split-second ago!
1753 */
1754 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1755 return;
1756
17e4ec14
JM		 1757 /* Track average RSSI from the Beacon frames of the current AP */
1758 ifmgd->last_beacon_signal = rx_status->signal;
1759 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1760 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1761 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1762 ifmgd->last_cqm_event_signal = 0;
391a200a 1763 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1764 } else {
1765 ifmgd->ave_beacon_signal =
1766 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1767 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1768 ifmgd->ave_beacon_signal) / 16;
391a200a 1769 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1770 }
1771 if (bss_conf->cqm_rssi_thold &&
391a200a 1772 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1773 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1774 int sig = ifmgd->ave_beacon_signal / 16;
1775 int last_event = ifmgd->last_cqm_event_signal;
1776 int thold = bss_conf->cqm_rssi_thold;
1777 int hyst = bss_conf->cqm_rssi_hyst;
1778 if (sig < thold &&
1779 (last_event == 0 || sig < last_event - hyst)) {
1780 ifmgd->last_cqm_event_signal = sig;
1781 ieee80211_cqm_rssi_notify(
1782 &sdata->vif,
1783 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1784 GFP_KERNEL);
1785 } else if (sig > thold &&
1786 (last_event == 0 || sig > last_event + hyst)) {
1787 ifmgd->last_cqm_event_signal = sig;
1788 ieee80211_cqm_rssi_notify(
1789 &sdata->vif,
1790 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1791 GFP_KERNEL);
1792 }
1793 }
1794
b291ba11 1795 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1796#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1797 if (net_ratelimit()) {
1798 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1799 "to a received beacon\n", sdata->name);
92778180
JM		 1800 }
1801#endif
b291ba11 1802 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1803 mutex_lock(&local->iflist_mtx);
1804 ieee80211_recalc_ps(local, -1);
1805 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1806 }
1807
b291ba11
JB		 1808 /*
1809 * Push the beacon loss detection into the future since
1810 * we are processing a beacon from the AP just now.
1811 */
d3a910a8 1812 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1813
d91f36db
JB		 1814 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1815 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1816 len - baselen, &elems,
1817 care_about_ies, ncrc);
1818
1819 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1820 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1821 ifmgd->aid);
d91f36db 1822
d8ec4433 1823 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1824 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1825 true);
d91f36db 1826
4ced3f74 1827 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1828 elems.wmm_param_len);
1829 }
fe3fa827 1830
25c9c875 1831 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1832 if (directed_tim) {
572e0012
KV		 1833 if (local->hw.conf.dynamic_ps_timeout > 0) {
1834 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1835 ieee80211_hw_config(local,
1836 IEEE80211_CONF_CHANGE_PS);
1837 ieee80211_send_nullfunc(local, sdata, 0);
1838 } else {
1839 local->pspolling = true;
1840
1841 /*
1842 * Here is assumed that the driver will be
1843 * able to send ps-poll frame and receive a
1844 * response even though power save mode is
1845 * enabled, but some drivers might require
1846 * to disable power save here. This needs
1847 * to be investigated.
1848 */
1849 ieee80211_send_pspoll(local, sdata);
1850 }
a97b77b9
VN		 1851 }
1852 }
7a5158ef 1853
d8ec4433 1854 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1855 return;
1856 ifmgd->beacon_crc = ncrc;
d8ec4433 1857 ifmgd->beacon_crc_valid = true;
30196673 1858
7a5158ef
JB		 1859 if (elems.erp_info && elems.erp_info_len >= 1) {
1860 erp_valid = true;
1861 erp_value = elems.erp_info[0];
1862 } else {
1863 erp_valid = false;
50c4afb9 1864 }
7a5158ef
JB		 1865 changed |= ieee80211_handle_bss_capability(sdata,
1866 le16_to_cpu(mgmt->u.beacon.capab_info),
1867 erp_valid, erp_value);
f0706e82 1868
d3c990fb 1869
53d6f81c 1870 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1871 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1872 struct sta_info *sta;
1873 struct ieee80211_supported_band *sband;
1874 u16 ap_ht_cap_flags;
1875
1876 rcu_read_lock();
1877
abe60632 1878 sta = sta_info_get(sdata, bssid);
77fdaa12 1879 if (WARN_ON(!sta)) {
ae5eb026
JB		 1880 rcu_read_unlock();
1881 return;
1882 }
1883
1884 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1885
1886 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1887 elems.ht_cap_elem, &sta->sta.ht_cap);
1888
1889 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1890
1891 rcu_read_unlock();
1892
1893 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1894 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1895 }
1896
8b19e6ca 1897 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1898 if (elems.country_elem) {
a8302de9
VT		 1899 /* TODO: IBSS also needs this */
1900 if (elems.pwr_constr_elem)
1901 ieee80211_handle_pwr_constr(sdata,
1902 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1903 elems.pwr_constr_elem,
1904 elems.pwr_constr_elem_len);
3f2355cb
LR		 1905 }
1906
471b3efd 1907 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1908}
1909
1fa57d01
JB		 1910void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1911 struct sk_buff *skb)
f0706e82 1912{
77fdaa12 1913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1914 struct ieee80211_rx_status *rx_status;
f0706e82 1915 struct ieee80211_mgmt *mgmt;
77fdaa12 1916 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1917 u16 fc;
1918
f0706e82
JB		 1919 rx_status = (struct ieee80211_rx_status *) skb->cb;
1920 mgmt = (struct ieee80211_mgmt *) skb->data;
1921 fc = le16_to_cpu(mgmt->frame_control);
1922
77fdaa12
JB		 1923 mutex_lock(&ifmgd->mtx);
1924
1925 if (ifmgd->associated &&
0c1ad2ca 1926 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1927 switch (fc & IEEE80211_FCTL_STYPE) {
1928 case IEEE80211_STYPE_BEACON:
1929 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1930 rx_status);
1931 break;
1932 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1933 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1934 break;
1935 case IEEE80211_STYPE_DEAUTH:
63f170e0 1936 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1937 break;
1938 case IEEE80211_STYPE_DISASSOC:
1939 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1940 break;
1941 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1942 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1943 case WLAN_CATEGORY_SPECTRUM_MGMT:
1944 ieee80211_sta_process_chanswitch(sdata,
1945 &mgmt->u.action.u.chan_switch.sw_elem,
1946 (void *)ifmgd->associated->priv,
1947 rx_status->mactime);
1948 break;
1949 }
77fdaa12
JB		 1950 }
1951 mutex_unlock(&ifmgd->mtx);
1952
1953 switch (rma) {
1954 case RX_MGMT_NONE:
1955 /* no action */
1956 break;
1957 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1958 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1959 break;
1960 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1961 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1962 break;
1963 default:
1964 WARN(1, "unexpected: %d", rma);
1965 }
36b3a628 1966 return;
77fdaa12
JB		 1967 }
1968
77fdaa12
JB		 1969 mutex_unlock(&ifmgd->mtx);
1970
63f170e0 1971 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1972 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1973 struct ieee80211_local *local = sdata->local;
1974 struct ieee80211_work *wk;
1975
a1699b75 1976 mutex_lock(&local->mtx);
b054b747
JB		 1977 list_for_each_entry(wk, &local->work_list, list) {
1978 if (wk->sdata != sdata)
1979 continue;
1980
e5b900d2
JB		 1981 if (wk->type != IEEE80211_WORK_ASSOC &&
1982 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1983 continue;
1984
1985 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1986 continue;
1987 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1988 continue;
1989
1990 /*
1991 * Printing the message only here means we can't
1992 * spuriously print it, but it also means that it
1993 * won't be printed when the frame comes in before
1994 * we even tried to associate or in similar cases.
1995 *
1996 * Ultimately, I suspect cfg80211 should print the
1997 * messages instead.
1998 */
1999 printk(KERN_DEBUG
2000 "%s: deauthenticated from %pM (Reason: %u)\n",
2001 sdata->name, mgmt->bssid,
2002 le16_to_cpu(mgmt->u.deauth.reason_code));
2003
2004 list_del_rcu(&wk->list);
2005 free_work(wk);
2006 break;
2007 }
a1699b75 2008 mutex_unlock(&local->mtx);
f0706e82 2009
ce470613 2010 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2011 }
f0706e82
JB		 2012}
2013
9c6bd790 2014static void ieee80211_sta_timer(unsigned long data)
f0706e82 2015{
60f8b39c
JB		 2016 struct ieee80211_sub_if_data *sdata =
2017 (struct ieee80211_sub_if_data *) data;
46900298 2018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2019 struct ieee80211_local *local = sdata->local;
f0706e82 2020
5bb644a0
JB		 2021 if (local->quiescing) {
2022 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2023 return;
2024 }
2025
64592c8f 2026 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2027}
2028
04ac3c0e
FF		 2029static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
2030 u8 *bssid)
2031{
2032 struct ieee80211_local *local = sdata->local;
2033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2034
2035 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2036 IEEE80211_STA_BEACON_POLL);
2037
2038 ieee80211_set_disassoc(sdata, true, true);
2039 mutex_unlock(&ifmgd->mtx);
2040 mutex_lock(&local->mtx);
2041 ieee80211_recalc_idle(local);
2042 mutex_unlock(&local->mtx);
2043 /*
2044 * must be outside lock due to cfg80211,
2045 * but that's not a problem.
2046 */
2047 ieee80211_send_deauth_disassoc(sdata, bssid,
2048 IEEE80211_STYPE_DEAUTH,
2049 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2050 NULL, true);
2051 mutex_lock(&ifmgd->mtx);
2052}
2053
1fa57d01 2054void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2055{
9c6bd790 2056 struct ieee80211_local *local = sdata->local;
1fa57d01 2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2058
77fdaa12
JB		 2059 /* then process the rest of the work */
2060 mutex_lock(&ifmgd->mtx);
2061
b291ba11
JB		 2062 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2063 IEEE80211_STA_CONNECTION_POLL) &&
2064 ifmgd->associated) {
a43abf29 2065 u8 bssid[ETH_ALEN];
72a8a3ed 2066 int max_tries;
a43abf29 2067
0c1ad2ca 2068 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2069
72a8a3ed 2070 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2071 max_tries = max_nullfunc_tries;
72a8a3ed 2072 else
180205bd 2073 max_tries = max_probe_tries;
72a8a3ed 2074
4e5ff376
FF		 2075 /* ACK received for nullfunc probing frame */
2076 if (!ifmgd->probe_send_count)
2077 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2078 else if (ifmgd->nullfunc_failed) {
2079 if (ifmgd->probe_send_count < max_tries) {
2080#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2081 wiphy_debug(local->hw.wiphy,
2082 "%s: No ack for nullfunc frame to"
bfc31df3 2083 " AP %pM, try %d/%i\n",
04ac3c0e 2084 sdata->name, bssid,
bfc31df3 2085 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2086#endif
2087 ieee80211_mgd_probe_ap_send(sdata);
2088 } else {
2089#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2090 wiphy_debug(local->hw.wiphy,
2091 "%s: No ack for nullfunc frame to"
2092 " AP %pM, disconnecting.\n",
c658e5db 2093 sdata->name, bssid);
04ac3c0e
FF		 2094#endif
2095 ieee80211_sta_connection_lost(sdata, bssid);
2096 }
2097 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2098 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2099 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2100#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2101 wiphy_debug(local->hw.wiphy,
2102 "%s: Failed to send nullfunc to AP %pM"
2103 " after %dms, disconnecting.\n",
2104 sdata->name,
180205bd 2105 bssid, probe_wait_ms);
04ac3c0e
FF		 2106#endif
2107 ieee80211_sta_connection_lost(sdata, bssid);
2108 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2109#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2110 wiphy_debug(local->hw.wiphy,
2111 "%s: No probe response from AP %pM"
bfc31df3 2112 " after %dms, try %d/%i\n",
b38afa87 2113 sdata->name,
180205bd 2114 bssid, probe_wait_ms,
bfc31df3 2115 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2116#endif
2117 ieee80211_mgd_probe_ap_send(sdata);
2118 } else {
b291ba11
JB		 2119 /*
2120 * We actually lost the connection ... or did we?
2121 * Let's make sure!
2122 */
b38afa87
BG		 2123 wiphy_debug(local->hw.wiphy,
2124 "%s: No probe response from AP %pM"
2125 " after %dms, disconnecting.\n",
2126 sdata->name,
180205bd 2127 bssid, probe_wait_ms);
04ac3c0e
FF		 2128
2129 ieee80211_sta_connection_lost(sdata, bssid);
b291ba11
JB		 2130 }
2131 }
2132
77fdaa12 2133 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2134}
2135
b291ba11
JB		 2136static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2137{
2138 struct ieee80211_sub_if_data *sdata =
2139 (struct ieee80211_sub_if_data *) data;
2140 struct ieee80211_local *local = sdata->local;
2141
2142 if (local->quiescing)
2143 return;
2144
1e4dcd01
JO		 2145 ieee80211_queue_work(&sdata->local->hw,
2146 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2147}
2148
2149static void ieee80211_sta_conn_mon_timer(unsigned long data)
2150{
2151 struct ieee80211_sub_if_data *sdata =
2152 (struct ieee80211_sub_if_data *) data;
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154 struct ieee80211_local *local = sdata->local;
2155
2156 if (local->quiescing)
2157 return;
2158
42935eca 2159 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2160}
2161
2162static void ieee80211_sta_monitor_work(struct work_struct *work)
2163{
2164 struct ieee80211_sub_if_data *sdata =
2165 container_of(work, struct ieee80211_sub_if_data,
2166 u.mgd.monitor_work);
2167
2168 ieee80211_mgd_probe_ap(sdata, false);
2169}
2170
9c6bd790
JB		 2171static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2172{
ad935687 2173 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2174 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2175 IEEE80211_STA_CONNECTION_POLL);
ad935687 2176
b291ba11 2177 /* let's probe the connection once */
42935eca 2178 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2179 &sdata->u.mgd.monitor_work);
2180 /* and do all the other regular work too */
64592c8f 2181 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2182 }
9c6bd790 2183}
f0706e82 2184
5bb644a0
JB		 2185#ifdef CONFIG_PM
2186void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2187{
2188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2189
2190 /*
2191 * we need to use atomic bitops for the running bits
2192 * only because both timers might fire at the same
2193 * time -- the code here is properly synchronised.
2194 */
2195
d1f5b7a3
JB		 2196 cancel_work_sync(&ifmgd->request_smps_work);
2197
1e4dcd01 2198 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2199 if (del_timer_sync(&ifmgd->timer))
2200 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2201
2202 cancel_work_sync(&ifmgd->chswitch_work);
2203 if (del_timer_sync(&ifmgd->chswitch_timer))
2204 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2205
2206 cancel_work_sync(&ifmgd->monitor_work);
2207 /* these will just be re-established on connection */
2208 del_timer_sync(&ifmgd->conn_mon_timer);
2209 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2210}
2211
2212void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2213{
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2215
2216 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2217 add_timer(&ifmgd->timer);
2218 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2219 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2220 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2221 ieee80211_restart_sta_timer(sdata);
a6af1d84 2222 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2223}
2224#endif
2225
9c6bd790
JB		 2226/* interface setup */
2227void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2228{
46900298 2229 struct ieee80211_if_managed *ifmgd;
988c0f72 2230
46900298 2231 ifmgd = &sdata->u.mgd;
b291ba11 2232 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2233 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2234 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2235 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2236 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2237 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2238 (unsigned long) sdata);
b291ba11
JB		 2239 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2240 (unsigned long) sdata);
2241 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2242 (unsigned long) sdata);
46900298 2243 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2244 (unsigned long) sdata);
9c6bd790 2245
ab1faead 2246 ifmgd->flags = 0;
bbbdff9e 2247
77fdaa12 2248 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2249
2250 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2251 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2252 else
2253 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2254}
2255
77fdaa12
JB		 2256/* scan finished notification */
2257void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2258{
77fdaa12 2259 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2260
77fdaa12
JB		 2261 /* Restart STA timers */
2262 rcu_read_lock();
2263 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2264 ieee80211_restart_sta_timer(sdata);
2265 rcu_read_unlock();
2266}
60f8b39c 2267
77fdaa12
JB		 2268int ieee80211_max_network_latency(struct notifier_block *nb,
2269 unsigned long data, void *dummy)
2270{
2271 s32 latency_usec = (s32) data;
2272 struct ieee80211_local *local =
2273 container_of(nb, struct ieee80211_local,
2274 network_latency_notifier);
1fa6f4af 2275
77fdaa12
JB		 2276 mutex_lock(&local->iflist_mtx);
2277 ieee80211_recalc_ps(local, latency_usec);
2278 mutex_unlock(&local->iflist_mtx);
dfe67012 2279
77fdaa12 2280 return 0;
9c6bd790
JB		 2281}
2282
77fdaa12 2283/* config hooks */
af6b6374
JB		 2284static enum work_done_result
2285ieee80211_probe_auth_done(struct ieee80211_work *wk,
2286 struct sk_buff *skb)
2287{
2288 if (!skb) {
2289 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2290 return WORK_DONE_DESTROY;
2291 }
2292
2293 if (wk->type == IEEE80211_WORK_AUTH) {
2294 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2295 return WORK_DONE_DESTROY;
2296 }
2297
2298 mutex_lock(&wk->sdata->u.mgd.mtx);
2299 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2300 mutex_unlock(&wk->sdata->u.mgd.mtx);
2301
2302 wk->type = IEEE80211_WORK_AUTH;
2303 wk->probe_auth.tries = 0;
2304 return WORK_DONE_REQUEUE;
2305}
2306
77fdaa12
JB		 2307int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2308 struct cfg80211_auth_request *req)
9c6bd790 2309{
77fdaa12 2310 const u8 *ssid;
f679f65d 2311 struct ieee80211_work *wk;
77fdaa12 2312 u16 auth_alg;
9c6bd790 2313
d5cdfacb
JM		 2314 if (req->local_state_change)
2315 return 0; /* no need to update mac80211 state */
2316
77fdaa12
JB		 2317 switch (req->auth_type) {
2318 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2319 auth_alg = WLAN_AUTH_OPEN;
2320 break;
2321 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2322 if (IS_ERR(sdata->local->wep_tx_tfm))
2323 return -EOPNOTSUPP;
77fdaa12
JB		 2324 auth_alg = WLAN_AUTH_SHARED_KEY;
2325 break;
2326 case NL80211_AUTHTYPE_FT:
2327 auth_alg = WLAN_AUTH_FT;
2328 break;
2329 case NL80211_AUTHTYPE_NETWORK_EAP:
2330 auth_alg = WLAN_AUTH_LEAP;
2331 break;
2332 default:
2333 return -EOPNOTSUPP;
60f8b39c 2334 }
77fdaa12
JB		 2335
2336 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2337 if (!wk)
9c6bd790 2338 return -ENOMEM;
77fdaa12 2339
5e124bd5 2340 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2341
2342 if (req->ie && req->ie_len) {
2343 memcpy(wk->ie, req->ie, req->ie_len);
2344 wk->ie_len = req->ie_len;
9c6bd790 2345 }
77fdaa12 2346
fffd0934 2347 if (req->key && req->key_len) {
af6b6374
JB		 2348 wk->probe_auth.key_len = req->key_len;
2349 wk->probe_auth.key_idx = req->key_idx;
2350 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2351 }
2352
77fdaa12 2353 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2354 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2355 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2356
af6b6374
JB		 2357 wk->probe_auth.algorithm = auth_alg;
2358 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2359
070bb547
JB		 2360 /* if we already have a probe, don't probe again */
2361 if (req->bss->proberesp_ies)
2362 wk->type = IEEE80211_WORK_AUTH;
2363 else
2364 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2365 wk->chan = req->bss->channel;
4d51e149 2366 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2367 wk->sdata = sdata;
2368 wk->done = ieee80211_probe_auth_done;
77fdaa12 2369
af6b6374 2370 ieee80211_add_work(wk);
9c6bd790 2371 return 0;
60f8b39c
JB		 2372}
2373
af6b6374
JB		 2374static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2375 struct sk_buff *skb)
2376{
2377 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2378 struct ieee80211_rx_status *rx_status;
2379 struct ieee802_11_elems elems;
af6b6374
JB		 2380 u16 status;
2381
2382 if (!skb) {
2383 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2384 return WORK_DONE_DESTROY;
2385 }
2386
e5b900d2
JB		 2387 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2388 mutex_lock(&wk->sdata->u.mgd.mtx);
2389 rx_status = (void *) skb->cb;
2390 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2391 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2392 &elems, true);
2393 mutex_unlock(&wk->sdata->u.mgd.mtx);
2394
2395 wk->type = IEEE80211_WORK_ASSOC;
2396 /* not really done yet */
2397 return WORK_DONE_REQUEUE;
2398 }
2399
af6b6374
JB		 2400 mgmt = (void *)skb->data;
2401 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2402
2403 if (status == WLAN_STATUS_SUCCESS) {
2404 mutex_lock(&wk->sdata->u.mgd.mtx);
2405 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2406 mutex_unlock(&wk->sdata->u.mgd.mtx);
2407 /* oops -- internal error -- send timeout for now */
2408 cfg80211_send_assoc_timeout(wk->sdata->dev,
2409 wk->filter_ta);
2410 return WORK_DONE_DESTROY;
2411 }
68542962
JO		 2412
2413 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2414 }
2415
2416 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2417 return WORK_DONE_DESTROY;
2418}
2419
77fdaa12
JB		 2420int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2421 struct cfg80211_assoc_request *req)
f0706e82 2422{
77fdaa12 2423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2424 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2425 struct ieee80211_work *wk;
63f170e0 2426 const u8 *ssid;
af6b6374 2427 int i;
f0706e82 2428
77fdaa12 2429 mutex_lock(&ifmgd->mtx);
af6b6374 2430 if (ifmgd->associated) {
9c87ba67
JM		 2431 if (!req->prev_bssid ||
2432 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2433 ETH_ALEN)) {
2434 /*
2435 * We are already associated and the request was not a
2436 * reassociation request from the current BSS, so
2437 * reject it.
2438 */
2439 mutex_unlock(&ifmgd->mtx);
2440 return -EALREADY;
2441 }
2442
2443 /* Trying to reassociate - clear previous association state */
53f73c09 2444 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2445 }
2446 mutex_unlock(&ifmgd->mtx);
77fdaa12 2447
63f170e0 2448 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2449 if (!wk)
2450 return -ENOMEM;
77fdaa12 2451
77fdaa12 2452 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2453 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2454
d8ec4433
JO		 2455 ifmgd->beacon_crc_valid = false;
2456
77fdaa12
JB		 2457 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2458 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2459 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2460 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2461 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2462
77fdaa12
JB		 2463
2464 if (req->ie && req->ie_len) {
2465 memcpy(wk->ie, req->ie, req->ie_len);
2466 wk->ie_len = req->ie_len;
2467 } else
2468 wk->ie_len = 0;
2469
0c1ad2ca 2470 wk->assoc.bss = req->bss;
f679f65d 2471
af6b6374 2472 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2473
af6b6374
JB		 2474 /* new association always uses requested smps mode */
2475 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2476 if (ifmgd->powersave)
2477 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2478 else
2479 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2480 } else
2481 ifmgd->ap_smps = ifmgd->req_smps;
2482
2483 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2484 /*
2485 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2486 * We still associate in non-HT mode (11a/b/g) if any one of these
2487 * ciphers is configured as pairwise.
2488 * We can set this to true for non-11n hardware, that'll be checked
2489 * separately along with the peer capabilities.
2490 */
af6b6374 2491 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2492 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2493 wk->assoc.wmm_used = bss->wmm_used;
2494 wk->assoc.supp_rates = bss->supp_rates;
2495 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2496 wk->assoc.ht_information_ie =
2497 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2498
ab13315a
KV		 2499 if (bss->wmm_used && bss->uapsd_supported &&
2500 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2501 wk->assoc.uapsd_used = true;
2502 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2503 } else {
2504 wk->assoc.uapsd_used = false;
2505 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2506 }
2507
63f170e0 2508 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2509 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2510 wk->assoc.ssid_len = ssid[1];
63f170e0 2511
77fdaa12 2512 if (req->prev_bssid)
f679f65d 2513 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2514
f679f65d 2515 wk->chan = req->bss->channel;
4d51e149 2516 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2517 wk->sdata = sdata;
2518 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2519 if (!bss->dtim_period &&
2520 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2521 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2522 else
2523 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2524
2525 if (req->use_mfp) {
2526 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2527 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2528 } else {
2529 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2530 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2531 }
2532
2533 if (req->crypto.control_port)
2534 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2535 else
2536 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2537
a621fa4d
JB		 2538 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2539 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2540
af6b6374
JB		 2541 ieee80211_add_work(wk);
2542 return 0;
f0706e82
JB		 2543}
2544
77fdaa12 2545int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2546 struct cfg80211_deauth_request *req,
2547 void *cookie)
f0706e82 2548{
af6b6374 2549 struct ieee80211_local *local = sdata->local;
46900298 2550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2551 struct ieee80211_work *wk;
05e48e8e
JM		 2552 u8 bssid[ETH_ALEN];
2553 bool assoc_bss = false;
f0706e82 2554
77fdaa12
JB		 2555 mutex_lock(&ifmgd->mtx);
2556
05e48e8e 2557 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2558 if (ifmgd->associated == req->bss) {
53f73c09 2559 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2560 mutex_unlock(&ifmgd->mtx);
05e48e8e 2561 assoc_bss = true;
af6b6374
JB		 2562 } else {
2563 bool not_auth_yet = false;
f0706e82 2564
a58ce43f 2565 mutex_unlock(&ifmgd->mtx);
a58ce43f 2566
a1699b75 2567 mutex_lock(&local->mtx);
af6b6374 2568 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2569 if (wk->sdata != sdata)
af6b6374 2570 continue;
29165e4c
JB		 2571
2572 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2573 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2574 wk->type != IEEE80211_WORK_ASSOC &&
2575 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2576 continue;
2577
af6b6374
JB		 2578 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2579 continue;
29165e4c
JB		 2580
2581 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2582 list_del_rcu(&wk->list);
af6b6374
JB		 2583 free_work(wk);
2584 break;
2585 }
a1699b75 2586 mutex_unlock(&local->mtx);
af6b6374
JB		 2587
2588 /*
2589 * If somebody requests authentication and we haven't
2590 * sent out an auth frame yet there's no need to send
2591 * out a deauth frame either. If the state was PROBE,
2592 * then this is the case. If it's AUTH we have sent a
2593 * frame, and if it's IDLE we have completed the auth
2594 * process already.
2595 */
2596 if (not_auth_yet) {
2597 __cfg80211_auth_canceled(sdata->dev, bssid);
2598 return 0;
2599 }
2600 }
77fdaa12 2601
0ff71613 2602 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2603 sdata->name, bssid, req->reason_code);
0ff71613 2604
d5cdfacb
JM		 2605 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2606 req->reason_code, cookie,
2607 !req->local_state_change);
05e48e8e
JM		 2608 if (assoc_bss)
2609 sta_info_destroy_addr(sdata, bssid);
f0706e82 2610
7da7cc1d 2611 mutex_lock(&sdata->local->mtx);
bc83b681 2612 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2613 mutex_unlock(&sdata->local->mtx);
bc83b681 2614
f0706e82
JB		 2615 return 0;
2616}
84363e6e 2617
77fdaa12 2618int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2619 struct cfg80211_disassoc_request *req,
2620 void *cookie)
9c6bd790 2621{
77fdaa12 2622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2623 u8 bssid[ETH_ALEN];
9c6bd790 2624
77fdaa12 2625 mutex_lock(&ifmgd->mtx);
10f644a4 2626
8d8b261a
JB		 2627 /*
2628 * cfg80211 should catch this ... but it's racy since
2629 * we can receive a disassoc frame, process it, hand it
2630 * to cfg80211 while that's in a locked section already
2631 * trying to tell us that the user wants to disconnect.
2632 */
0c1ad2ca 2633 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2634 mutex_unlock(&ifmgd->mtx);
2635 return -ENOLINK;
2636 }
2637
0ff71613 2638 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2639 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2640
e69e95db 2641 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2642 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2643
2644 mutex_unlock(&ifmgd->mtx);
10f644a4 2645
77fdaa12 2646 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2647 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2648 cookie, !req->local_state_change);
e69e95db 2649 sta_info_destroy_addr(sdata, bssid);
bc83b681 2650
7da7cc1d 2651 mutex_lock(&sdata->local->mtx);
bc83b681 2652 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2653 mutex_unlock(&sdata->local->mtx);
bc83b681 2654
10f644a4
JB		 2655 return 0;
2656}
026331c4 2657
a97c13c3
JO		 2658void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2659 enum nl80211_cqm_rssi_threshold_event rssi_event,
2660 gfp_t gfp)
2661{
2662 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2663
b5878a2d
JB		 2664 trace_api_cqm_rssi_notify(sdata, rssi_event);
2665
a97c13c3
JO		 2666 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2667}
2668EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2669
2670unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2671{
2672 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2673 return sdata->dev->operstate;
2674}
2675EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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