]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-jammy-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: restart beacon miss timer on system resume from suspend
[mirror_ubuntu-jammy-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
a43abf29 31#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB		 32
33/*
34 * beacon loss detection timeout
35 * XXX: should depend on beacon interval
36 */
37#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38/*
39 * Time the connection can be idle before we probe
40 * it to see if we can still talk to the AP.
41 */
d1c5091f 42#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 43/*
44 * Time we wait for a probe response after sending
45 * a probe request because of beacon loss or for
46 * checking the connection still works.
47 */
d1c5091f 48#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 49
17e4ec14
JM		 50/*
51 * Weight given to the latest Beacon frame when calculating average signal
52 * strength for Beacon frames received in the current BSS. This must be
53 * between 1 and 15.
54 */
55#define IEEE80211_SIGNAL_AVE_WEIGHT 3
56
391a200a
JM		 57/*
58 * How many Beacon frames need to have been used in average signal strength
59 * before starting to indicate signal change events.
60 */
61#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
62
5bb644a0
JB		 63#define TMR_RUNNING_TIMER 0
64#define TMR_RUNNING_CHANSW 1
65
77fdaa12
JB		 66/*
67 * All cfg80211 functions have to be called outside a locked
68 * section so that they can acquire a lock themselves... This
69 * is much simpler than queuing up things in cfg80211, but we
70 * do need some indirection for that here.
71 */
72enum rx_mgmt_action {
73 /* no action required */
74 RX_MGMT_NONE,
75
76 /* caller must call cfg80211_send_rx_auth() */
77 RX_MGMT_CFG80211_AUTH,
78
79 /* caller must call cfg80211_send_rx_assoc() */
80 RX_MGMT_CFG80211_ASSOC,
81
82 /* caller must call cfg80211_send_deauth() */
83 RX_MGMT_CFG80211_DEAUTH,
84
85 /* caller must call cfg80211_send_disassoc() */
86 RX_MGMT_CFG80211_DISASSOC,
87
5d1ec85f
JB		 88 /* caller must tell cfg80211 about internal error */
89 RX_MGMT_CFG80211_ASSOC_ERROR,
77fdaa12
JB		 90};
91
5484e237 92/* utils */
77fdaa12
JB		 93static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
94{
46a5ebaf 95 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 96}
97
ca386f31
JB		 98/*
99 * We can have multiple work items (and connection probing)
100 * scheduling this timer, but we need to take care to only
101 * reschedule it when it should fire _earlier_ than it was
102 * asked for before, or if it's not pending right now. This
103 * function ensures that. Note that it then is required to
104 * run this function for all timeouts after the first one
105 * has happened -- the work that runs from this timer will
106 * do that.
107 */
108static void run_again(struct ieee80211_if_managed *ifmgd,
109 unsigned long timeout)
110{
111 ASSERT_MGD_MTX(ifmgd);
112
113 if (!timer_pending(&ifmgd->timer) ||
114 time_before(timeout, ifmgd->timer.expires))
115 mod_timer(&ifmgd->timer, timeout);
116}
117
d3a910a8 118void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 119{
120 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
121 return;
122
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
125}
126
be099e82
LR		 127void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128{
0c699c3a
LR		 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
be099e82
LR		 131 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
132 return;
133
134 mod_timer(&sdata->u.mgd.conn_mon_timer,
135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 136
137 ifmgd->probe_send_count = 0;
be099e82
LR		 138}
139
5484e237 140static int ecw2cw(int ecw)
60f8b39c 141{
5484e237 142 return (1 << ecw) - 1;
60f8b39c
JB		 143}
144
d5522e03
JB		 145/*
146 * ieee80211_enable_ht should be called only after the operating band
147 * has been determined as ht configuration depends on the hw's
148 * HT abilities for a specific band.
149 */
150static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_ht_info *hti,
77fdaa12 152 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 153{
154 struct ieee80211_local *local = sdata->local;
155 struct ieee80211_supported_band *sband;
d5522e03
JB		 156 struct sta_info *sta;
157 u32 changed = 0;
9ed6bcce 158 u16 ht_opmode;
0aaffa9b
JB		 159 bool enable_ht = true;
160 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
162
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
164
0aaffa9b
JB		 165 prev_chantype = sdata->vif.bss_conf.channel_type;
166
d5522e03
JB		 167 /* HT is not supported */
168 if (!sband->ht_cap.ht_supported)
169 enable_ht = false;
170
171 /* check that channel matches the right operating channel */
172 if (local->hw.conf.channel->center_freq !=
173 ieee80211_channel_to_frequency(hti->control_chan))
174 enable_ht = false;
175
176 if (enable_ht) {
177 channel_type = NL80211_CHAN_HT20;
178
179 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
180 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
181 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
182 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
183 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 184 if (!(local->hw.conf.channel->flags &
185 IEEE80211_CHAN_NO_HT40PLUS))
186 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 187 break;
188 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 189 if (!(local->hw.conf.channel->flags &
190 IEEE80211_CHAN_NO_HT40MINUS))
191 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 192 break;
193 }
194 }
195 }
196
fe6f212c
RC		 197 if (local->tmp_channel)
198 local->tmp_channel_type = channel_type;
d5522e03 199
0aaffa9b
JB		 200 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
201 /* can only fail due to HT40+/- mismatch */
202 channel_type = NL80211_CHAN_HT20;
203 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
204 }
d5522e03 205
0aaffa9b
JB		 206 /* channel_type change automatically detected */
207 ieee80211_hw_config(local, 0);
d5522e03 208
0aaffa9b 209 if (prev_chantype != channel_type) {
d5522e03 210 rcu_read_lock();
abe60632 211 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 212 if (sta)
213 rate_control_rate_update(local, sband, sta,
4fa00437 214 IEEE80211_RC_HT_CHANGED,
0aaffa9b 215 channel_type);
d5522e03 216 rcu_read_unlock();
0aaffa9b 217 }
d5522e03 218
9ed6bcce 219 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 220
221 /* if bss configuration changed store the new one */
0aaffa9b
JB		 222 if (sdata->ht_opmode_valid != enable_ht ||
223 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
224 prev_chantype != channel_type) {
d5522e03 225 changed |= BSS_CHANGED_HT;
9ed6bcce 226 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 227 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 228 }
229
230 return changed;
231}
232
9c6bd790
JB		 233/* frame sending functions */
234
ef422bc0 235static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 236 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 237 void *cookie, bool send_frame)
9ac19a90
JB		 238{
239 struct ieee80211_local *local = sdata->local;
46900298 240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 241 struct sk_buff *skb;
242 struct ieee80211_mgmt *mgmt;
9aed3cc1 243
65fc73ac 244 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 245 if (!skb) {
ef422bc0 246 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 247 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 248 return;
249 }
250 skb_reserve(skb, local->hw.extra_tx_headroom);
251
252 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
253 memset(mgmt, 0, 24);
77fdaa12 254 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 255 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 256 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 257 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 258 skb_put(skb, 2);
ef422bc0 259 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 260 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
261
53b46b84 262 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 263 if (cookie)
264 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
265 else
266 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 267 else
ce470613
HS		 268 if (cookie)
269 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
270 else
271 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 272 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
273 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 274
275 if (send_frame)
276 ieee80211_tx_skb(sdata, skb);
277 else
278 kfree_skb(skb);
9ac19a90
JB		 279}
280
572e0012
KV		 281void ieee80211_send_pspoll(struct ieee80211_local *local,
282 struct ieee80211_sub_if_data *sdata)
283{
572e0012
KV		 284 struct ieee80211_pspoll *pspoll;
285 struct sk_buff *skb;
572e0012 286
d8cd189e
KV		 287 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
288 if (!skb)
572e0012 289 return;
572e0012 290
d8cd189e
KV		 291 pspoll = (struct ieee80211_pspoll *) skb->data;
292 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 293
62ae67be
JB		 294 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
295 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 296}
297
965bedad
JB		 298void ieee80211_send_nullfunc(struct ieee80211_local *local,
299 struct ieee80211_sub_if_data *sdata,
300 int powersave)
301{
302 struct sk_buff *skb;
d8cd189e 303 struct ieee80211_hdr_3addr *nullfunc;
965bedad 304
d8cd189e
KV		 305 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
306 if (!skb)
965bedad 307 return;
965bedad 308
d8cd189e 309 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 310 if (powersave)
d8cd189e 311 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 312
62ae67be
JB		 313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
314 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 315}
316
d524215f
FF		 317static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
318 struct ieee80211_sub_if_data *sdata)
319{
320 struct sk_buff *skb;
321 struct ieee80211_hdr *nullfunc;
322 __le16 fc;
323
324 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
325 return;
326
327 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
328 if (!skb) {
329 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
330 "nullfunc frame\n", sdata->name);
331 return;
332 }
333 skb_reserve(skb, local->hw.extra_tx_headroom);
334
335 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
336 memset(nullfunc, 0, 30);
337 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
338 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
339 nullfunc->frame_control = fc;
340 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
341 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
342 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
343 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
344
345 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
346 ieee80211_tx_skb(sdata, skb);
347}
348
cc32abd4
JB		 349/* spectrum management related things */
350static void ieee80211_chswitch_work(struct work_struct *work)
351{
352 struct ieee80211_sub_if_data *sdata =
353 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
355
9607e6b6 356 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 357 return;
358
77fdaa12
JB		 359 mutex_lock(&ifmgd->mtx);
360 if (!ifmgd->associated)
361 goto out;
cc32abd4
JB		 362
363 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 364 if (!sdata->local->ops->channel_switch) {
365 /* call "hw_config" only if doing sw channel switch */
366 ieee80211_hw_config(sdata->local,
367 IEEE80211_CONF_CHANGE_CHANNEL);
368 }
77fdaa12 369
cc32abd4 370 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 371 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 372
cc32abd4
JB		 373 ieee80211_wake_queues_by_reason(&sdata->local->hw,
374 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 375 out:
376 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
377 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 378}
379
5ce6e438
JB		 380void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
381{
382 struct ieee80211_sub_if_data *sdata;
383 struct ieee80211_if_managed *ifmgd;
384
385 sdata = vif_to_sdata(vif);
386 ifmgd = &sdata->u.mgd;
387
388 trace_api_chswitch_done(sdata, success);
389 if (!success) {
390 /*
391 * If the channel switch was not successful, stay
392 * around on the old channel. We currently lack
393 * good handling of this situation, possibly we
394 * should just drop the association.
395 */
396 sdata->local->csa_channel = sdata->local->oper_channel;
397 }
398
399 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
400}
401EXPORT_SYMBOL(ieee80211_chswitch_done);
402
cc32abd4
JB		 403static void ieee80211_chswitch_timer(unsigned long data)
404{
405 struct ieee80211_sub_if_data *sdata =
406 (struct ieee80211_sub_if_data *) data;
407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
408
5bb644a0
JB		 409 if (sdata->local->quiescing) {
410 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
411 return;
412 }
413
42935eca 414 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 415}
416
417void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
418 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 419 struct ieee80211_bss *bss,
420 u64 timestamp)
cc32abd4 421{
0c1ad2ca
JB		 422 struct cfg80211_bss *cbss =
423 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 424 struct ieee80211_channel *new_ch;
425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
426 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
427
77fdaa12
JB		 428 ASSERT_MGD_MTX(ifmgd);
429
430 if (!ifmgd->associated)
cc32abd4
JB		 431 return;
432
fbe9c429 433 if (sdata->local->scanning)
cc32abd4
JB		 434 return;
435
436 /* Disregard subsequent beacons if we are already running a timer
437 processing a CSA */
438
439 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
440 return;
441
442 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
443 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
444 return;
445
446 sdata->local->csa_channel = new_ch;
447
5ce6e438
JB		 448 if (sdata->local->ops->channel_switch) {
449 /* use driver's channel switch callback */
450 struct ieee80211_channel_switch ch_switch;
451 memset(&ch_switch, 0, sizeof(ch_switch));
452 ch_switch.timestamp = timestamp;
453 if (sw_elem->mode) {
454 ch_switch.block_tx = true;
455 ieee80211_stop_queues_by_reason(&sdata->local->hw,
456 IEEE80211_QUEUE_STOP_REASON_CSA);
457 }
458 ch_switch.channel = new_ch;
459 ch_switch.count = sw_elem->count;
460 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
461 drv_channel_switch(sdata->local, &ch_switch);
462 return;
463 }
464
465 /* channel switch handled in software */
cc32abd4 466 if (sw_elem->count <= 1) {
42935eca 467 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 468 } else {
9feaddc7
WYG		 469 if (sw_elem->mode)
470 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 471 IEEE80211_QUEUE_STOP_REASON_CSA);
472 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
473 mod_timer(&ifmgd->chswitch_timer,
474 jiffies +
475 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 476 cbss->beacon_interval));
cc32abd4
JB		 477 }
478}
479
480static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
481 u16 capab_info, u8 *pwr_constr_elem,
482 u8 pwr_constr_elem_len)
483{
484 struct ieee80211_conf *conf = &sdata->local->hw.conf;
485
486 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
487 return;
488
489 /* Power constraint IE length should be 1 octet */
490 if (pwr_constr_elem_len != 1)
491 return;
492
493 if ((*pwr_constr_elem <= conf->channel->max_power) &&
494 (*pwr_constr_elem != sdata->local->power_constr_level)) {
495 sdata->local->power_constr_level = *pwr_constr_elem;
496 ieee80211_hw_config(sdata->local, 0);
497 }
498}
499
f90754c1
JO		 500void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
501{
502 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
503 struct ieee80211_local *local = sdata->local;
504 struct ieee80211_conf *conf = &local->hw.conf;
505
506 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
507 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
508 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
509
510 local->disable_dynamic_ps = false;
511 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
512}
513EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
514
515void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
516{
517 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
518 struct ieee80211_local *local = sdata->local;
519 struct ieee80211_conf *conf = &local->hw.conf;
520
521 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
522 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
523 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
524
525 local->disable_dynamic_ps = true;
526 conf->dynamic_ps_timeout = 0;
527 del_timer_sync(&local->dynamic_ps_timer);
528 ieee80211_queue_work(&local->hw,
529 &local->dynamic_ps_enable_work);
530}
531EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
532
965bedad
JB		 533/* powersave */
534static void ieee80211_enable_ps(struct ieee80211_local *local,
535 struct ieee80211_sub_if_data *sdata)
536{
537 struct ieee80211_conf *conf = &local->hw.conf;
538
d5edaedc
JB		 539 /*
540 * If we are scanning right now then the parameters will
541 * take effect when scan finishes.
542 */
fbe9c429 543 if (local->scanning)
d5edaedc
JB		 544 return;
545
965bedad
JB		 546 if (conf->dynamic_ps_timeout > 0 &&
547 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
548 mod_timer(&local->dynamic_ps_timer, jiffies +
549 msecs_to_jiffies(conf->dynamic_ps_timeout));
550 } else {
551 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
552 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 553
2a13052f
JO		 554 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
555 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
556 return;
557
558 conf->flags |= IEEE80211_CONF_PS;
559 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 560 }
561}
562
563static void ieee80211_change_ps(struct ieee80211_local *local)
564{
565 struct ieee80211_conf *conf = &local->hw.conf;
566
567 if (local->ps_sdata) {
965bedad
JB		 568 ieee80211_enable_ps(local, local->ps_sdata);
569 } else if (conf->flags & IEEE80211_CONF_PS) {
570 conf->flags &= ~IEEE80211_CONF_PS;
571 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
572 del_timer_sync(&local->dynamic_ps_timer);
573 cancel_work_sync(&local->dynamic_ps_enable_work);
574 }
575}
576
577/* need to hold RTNL or interface lock */
10f644a4 578void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 579{
580 struct ieee80211_sub_if_data *sdata, *found = NULL;
581 int count = 0;
195e294d 582 int timeout;
965bedad
JB		 583
584 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
585 local->ps_sdata = NULL;
586 return;
587 }
588
af6b6374
JB		 589 if (!list_empty(&local->work_list)) {
590 local->ps_sdata = NULL;
591 goto change;
592 }
593
965bedad 594 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 595 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 596 continue;
597 if (sdata->vif.type != NL80211_IFTYPE_STATION)
598 continue;
599 found = sdata;
600 count++;
601 }
602
43f78531 603 if (count == 1 && found->u.mgd.powersave &&
af6b6374 604 found->u.mgd.associated &&
56007a02 605 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 606 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
607 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 608 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 609 s32 beaconint_us;
610
611 if (latency < 0)
ed77134b 612 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 613
614 beaconint_us = ieee80211_tu_to_usec(
615 found->vif.bss_conf.beacon_int);
616
ff616381 617 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 618 if (timeout < 0) {
619 /*
ff616381
JO		 620 * Go to full PSM if the user configures a very low
621 * latency requirement.
195e294d
JO		 622 * The 2 second value is there for compatibility until
623 * the PM_QOS_NETWORK_LATENCY is configured with real
624 * values.
625 */
ff616381 626 if (latency > 1900000000 && latency != 2000000000)
195e294d 627 timeout = 0;
ff616381
JO		 628 else
629 timeout = 100;
195e294d 630 }
f90754c1
JO		 631 local->dynamic_ps_user_timeout = timeout;
632 if (!local->disable_dynamic_ps)
633 conf->dynamic_ps_timeout =
634 local->dynamic_ps_user_timeout;
195e294d 635
04fe2037 636 if (beaconint_us > latency) {
10f644a4 637 local->ps_sdata = NULL;
04fe2037 638 } else {
56007a02 639 struct ieee80211_bss *bss;
04fe2037 640 int maxslp = 1;
56007a02 641 u8 dtimper;
04fe2037 642
56007a02
JB		 643 bss = (void *)found->u.mgd.associated->priv;
644 dtimper = bss->dtim_period;
645
646 /* If the TIM IE is invalid, pretend the value is 1 */
647 if (!dtimper)
648 dtimper = 1;
649 else if (dtimper > 1)
04fe2037
JB		 650 maxslp = min_t(int, dtimper,
651 latency / beaconint_us);
652
9ccebe61 653 local->hw.conf.max_sleep_period = maxslp;
56007a02 654 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 655 local->ps_sdata = found;
04fe2037 656 }
10f644a4 657 } else {
965bedad 658 local->ps_sdata = NULL;
10f644a4 659 }
965bedad 660
af6b6374 661 change:
965bedad
JB		 662 ieee80211_change_ps(local);
663}
664
665void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
666{
667 struct ieee80211_local *local =
668 container_of(work, struct ieee80211_local,
669 dynamic_ps_disable_work);
670
671 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
672 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
673 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
674 }
675
676 ieee80211_wake_queues_by_reason(&local->hw,
677 IEEE80211_QUEUE_STOP_REASON_PS);
678}
679
680void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
681{
682 struct ieee80211_local *local =
683 container_of(work, struct ieee80211_local,
684 dynamic_ps_enable_work);
685 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 687
688 /* can only happen when PS was just disabled anyway */
689 if (!sdata)
690 return;
691
692 if (local->hw.conf.flags & IEEE80211_CONF_PS)
693 return;
694
375177bf
VN		 695 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
696 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 697 ieee80211_send_nullfunc(local, sdata, 1);
698
2a13052f
JO		 699 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
700 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 701 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
702 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
703 local->hw.conf.flags |= IEEE80211_CONF_PS;
704 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
705 }
965bedad
JB		 706}
707
708void ieee80211_dynamic_ps_timer(unsigned long data)
709{
710 struct ieee80211_local *local = (void *) data;
711
78f1a8b7 712 if (local->quiescing || local->suspended)
5bb644a0
JB		 713 return;
714
42935eca 715 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 716}
717
60f8b39c 718/* MLME */
f698d856 719static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 720 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 721 u8 *wmm_param, size_t wmm_param_len)
722{
f0706e82 723 struct ieee80211_tx_queue_params params;
4ced3f74 724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 725 size_t left;
726 int count;
ab13315a 727 u8 *pos, uapsd_queues = 0;
f0706e82 728
e1b3ec1a
SG		 729 if (!local->ops->conf_tx)
730 return;
731
af6b6374 732 if (local->hw.queues < 4)
3434fbd3
JB		 733 return;
734
735 if (!wmm_param)
736 return;
737
f0706e82
JB		 738 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
739 return;
ab13315a
KV		 740
741 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 742 uapsd_queues = local->uapsd_queues;
ab13315a 743
f0706e82 744 count = wmm_param[6] & 0x0f;
46900298 745 if (count == ifmgd->wmm_last_param_set)
f0706e82 746 return;
46900298 747 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 748
749 pos = wmm_param + 8;
750 left = wmm_param_len - 8;
751
752 memset(&params, 0, sizeof(params));
753
f0706e82
JB		 754 local->wmm_acm = 0;
755 for (; left >= 4; left -= 4, pos += 4) {
756 int aci = (pos[0] >> 5) & 0x03;
757 int acm = (pos[0] >> 4) & 0x01;
ab13315a 758 bool uapsd = false;
f0706e82
JB		 759 int queue;
760
761 switch (aci) {
0eeb59fe 762 case 1: /* AC_BK */
e100bb64 763 queue = 3;
988c0f72 764 if (acm)
0eeb59fe 765 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
767 uapsd = true;
f0706e82 768 break;
0eeb59fe 769 case 2: /* AC_VI */
e100bb64 770 queue = 1;
988c0f72 771 if (acm)
0eeb59fe 772 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
774 uapsd = true;
f0706e82 775 break;
0eeb59fe 776 case 3: /* AC_VO */
e100bb64 777 queue = 0;
988c0f72 778 if (acm)
0eeb59fe 779 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
781 uapsd = true;
f0706e82 782 break;
0eeb59fe 783 case 0: /* AC_BE */
f0706e82 784 default:
e100bb64 785 queue = 2;
988c0f72 786 if (acm)
0eeb59fe 787 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
789 uapsd = true;
f0706e82
JB		 790 break;
791 }
792
793 params.aifs = pos[0] & 0x0f;
794 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
795 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 796 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 797 params.uapsd = uapsd;
798
f4ea83dd 799#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 800 wiphy_debug(local->hw.wiphy,
801 "WMM queue=%d aci=%d acm=%d aifs=%d "
802 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
803 queue, aci, acm,
804 params.aifs, params.cw_min, params.cw_max,
805 params.txop, params.uapsd);
3330d7be 806#endif
e1b3ec1a 807 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 808 wiphy_debug(local->hw.wiphy,
809 "failed to set TX queue parameters for queue %d\n",
810 queue);
f0706e82 811 }
e1b3ec1a
SG		 812
813 /* enable WMM or activate new settings */
4ced3f74
JB		 814 sdata->vif.bss_conf.qos = true;
815 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 816}
817
7a5158ef
JB		 818static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
819 u16 capab, bool erp_valid, u8 erp)
5628221c 820{
bda3933a 821 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 822 u32 changed = 0;
7a5158ef
JB		 823 bool use_protection;
824 bool use_short_preamble;
825 bool use_short_slot;
826
827 if (erp_valid) {
828 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
829 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
830 } else {
831 use_protection = false;
832 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
833 }
834
835 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 836 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
837 use_short_slot = true;
5628221c 838
471b3efd 839 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 840 bss_conf->use_cts_prot = use_protection;
841 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 842 }
7e9ed188 843
d43c7b37 844 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 845 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 846 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 847 }
d9430a32 848
7a5158ef 849 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 850 bss_conf->use_short_slot = use_short_slot;
851 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 852 }
853
854 return changed;
855}
856
f698d856 857static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 858 struct cfg80211_bss *cbss,
ae5eb026 859 u32 bss_info_changed)
f0706e82 860{
0c1ad2ca 861 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 862 struct ieee80211_local *local = sdata->local;
68542962 863 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 864
ae5eb026 865 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 866 /* set timing information */
68542962
JO		 867 bss_conf->beacon_int = cbss->beacon_interval;
868 bss_conf->timestamp = cbss->tsf;
5628221c 869
77fdaa12
JB		 870 bss_info_changed |= BSS_CHANGED_BEACON_INT;
871 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 872 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 873
0c1ad2ca
JB		 874 sdata->u.mgd.associated = cbss;
875 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 876
17e4ec14
JM		 877 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
878
b291ba11
JB		 879 /* just to be sure */
880 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
881 IEEE80211_STA_BEACON_POLL);
882
9ac19a90 883 ieee80211_led_assoc(local, 1);
9306102e 884
e5b900d2
JB		 885 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
886 bss_conf->dtim_period = bss->dtim_period;
887 else
888 bss_conf->dtim_period = 0;
889
68542962 890 bss_conf->assoc = 1;
96dd22ac
JB		 891 /*
892 * For now just always ask the driver to update the basic rateset
893 * when we have associated, we aren't checking whether it actually
894 * changed or not.
895 */
ae5eb026 896 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 897
898 /* And the BSSID changed - we're associated now */
899 bss_info_changed |= BSS_CHANGED_BSSID;
900
a97c13c3
JO		 901 /* Tell the driver to monitor connection quality (if supported) */
902 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 903 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 904 bss_info_changed |= BSS_CHANGED_CQM;
905
68542962
JO		 906 /* Enable ARP filtering */
907 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
908 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
909 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
910 }
911
ae5eb026 912 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 913
056508dc
JB		 914 mutex_lock(&local->iflist_mtx);
915 ieee80211_recalc_ps(local, -1);
025e6be2 916 ieee80211_recalc_smps(local);
056508dc 917 mutex_unlock(&local->iflist_mtx);
e0cb686f 918
8a5b33f5 919 netif_tx_start_all_queues(sdata->dev);
9ac19a90 920 netif_carrier_on(sdata->dev);
f0706e82
JB		 921}
922
e69e95db 923static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 924 bool remove_sta, bool tx)
aa458d17 925{
46900298 926 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 927 struct ieee80211_local *local = sdata->local;
928 struct sta_info *sta;
e0cb686f 929 u32 changed = 0, config_changed = 0;
b291ba11 930 u8 bssid[ETH_ALEN];
aa458d17 931
77fdaa12
JB		 932 ASSERT_MGD_MTX(ifmgd);
933
b291ba11
JB		 934 if (WARN_ON(!ifmgd->associated))
935 return;
936
0c1ad2ca 937 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 938
77fdaa12
JB		 939 ifmgd->associated = NULL;
940 memset(ifmgd->bssid, 0, ETH_ALEN);
941
942 /*
943 * we need to commit the associated = NULL change because the
944 * scan code uses that to determine whether this iface should
945 * go to/wake up from powersave or not -- and could otherwise
946 * wake the queues erroneously.
947 */
948 smp_mb();
949
950 /*
951 * Thus, we can only afterwards stop the queues -- to account
952 * for the case where another CPU is finishing a scan at this
953 * time -- we don't want the scan code to enable queues.
954 */
aa458d17 955
8a5b33f5 956 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 957 netif_carrier_off(sdata->dev);
958
2a419056 959 mutex_lock(&local->sta_mtx);
abe60632 960 sta = sta_info_get(sdata, bssid);
4cad6c7c 961 if (sta) {
2a419056 962 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 963 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 964 }
2a419056 965 mutex_unlock(&local->sta_mtx);
aa458d17 966
f5e5bf25
TW		 967 changed |= ieee80211_reset_erp_info(sdata);
968
f5e5bf25 969 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 970 changed |= BSS_CHANGED_ASSOC;
971 sdata->vif.bss_conf.assoc = false;
f5e5bf25 972
aa837e1d
JB		 973 ieee80211_set_wmm_default(sdata);
974
4797938c 975 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 976 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 977
413ad50a
JB		 978 /* on the next assoc, re-program HT parameters */
979 sdata->ht_opmode_valid = false;
980
a8302de9
VT		 981 local->power_constr_level = 0;
982
520eb820
KV		 983 del_timer_sync(&local->dynamic_ps_timer);
984 cancel_work_sync(&local->dynamic_ps_enable_work);
985
e0cb686f
KV		 986 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
987 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
988 config_changed |= IEEE80211_CONF_CHANGE_PS;
989 }
ae5eb026 990
e0cb686f 991 ieee80211_hw_config(local, config_changed);
9cef8737 992
68542962
JO		 993 /* Disable ARP filtering */
994 if (sdata->vif.bss_conf.arp_filter_enabled) {
995 sdata->vif.bss_conf.arp_filter_enabled = false;
996 changed |= BSS_CHANGED_ARP_FILTER;
997 }
998
0aaffa9b
JB		 999 /* The BSSID (not really interesting) and HT changed */
1000 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1001 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1002
e69e95db
JM		 1003 if (remove_sta)
1004 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1005
1006 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1007 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1008 del_timer_sync(&sdata->u.mgd.timer);
1009 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1010}
f0706e82 1011
3cf335d5
KV		 1012void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1013 struct ieee80211_hdr *hdr)
1014{
1015 /*
1016 * We can postpone the mgd.timer whenever receiving unicast frames
1017 * from AP because we know that the connection is working both ways
1018 * at that time. But multicast frames (and hence also beacons) must
1019 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1020 * data idle periods for sending the periodic probe request to the
1021 * AP we're connected to.
3cf335d5 1022 */
b291ba11
JB		 1023 if (is_multicast_ether_addr(hdr->addr1))
1024 return;
1025
be099e82 1026 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1027}
f0706e82 1028
a43abf29
ML		 1029static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1030{
1031 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1032 const u8 *ssid;
f01a067d
LR		 1033 u8 *dst = ifmgd->associated->bssid;
1034 u8 unicast_limit = max(1, IEEE80211_MAX_PROBE_TRIES - 3);
1035
1036 /*
1037 * Try sending broadcast probe requests for the last three
1038 * probe requests after the first ones failed since some
1039 * buggy APs only support broadcast probe requests.
1040 */
1041 if (ifmgd->probe_send_count >= unicast_limit)
1042 dst = NULL;
a43abf29 1043
0c1ad2ca 1044 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
f01a067d 1045 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
a43abf29
ML		 1046
1047 ifmgd->probe_send_count++;
1048 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1049 run_again(ifmgd, ifmgd->probe_timeout);
1050}
1051
b291ba11
JB		 1052static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1053 bool beacon)
04de8381 1054{
04de8381 1055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1056 bool already = false;
34bfc411 1057
9607e6b6 1058 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1059 return;
1060
91a3bd76
LR		 1061 if (sdata->local->scanning)
1062 return;
1063
b8bc4b0a
JB		 1064 if (sdata->local->tmp_channel)
1065 return;
1066
77fdaa12
JB		 1067 mutex_lock(&ifmgd->mtx);
1068
1069 if (!ifmgd->associated)
1070 goto out;
1071
a860402d 1072#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1073 if (beacon && net_ratelimit())
1074 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1075 "- sending probe request\n", sdata->name);
a860402d 1076#endif
04de8381 1077
b291ba11
JB		 1078 /*
1079 * The driver/our work has already reported this event or the
1080 * connection monitoring has kicked in and we have already sent
1081 * a probe request. Or maybe the AP died and the driver keeps
1082 * reporting until we disassociate...
1083 *
1084 * In either case we have to ignore the current call to this
1085 * function (except for setting the correct probe reason bit)
1086 * because otherwise we would reset the timer every time and
1087 * never check whether we received a probe response!
1088 */
1089 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1090 IEEE80211_STA_CONNECTION_POLL))
1091 already = true;
1092
1093 if (beacon)
1094 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1095 else
1096 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1097
1098 if (already)
1099 goto out;
1100
4e751843
JB		 1101 mutex_lock(&sdata->local->iflist_mtx);
1102 ieee80211_recalc_ps(sdata->local, -1);
1103 mutex_unlock(&sdata->local->iflist_mtx);
1104
a43abf29
ML		 1105 ifmgd->probe_send_count = 0;
1106 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1107 out:
1108 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1109}
1110
a619a4c0
JO		 1111struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1112 struct ieee80211_vif *vif)
1113{
1114 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1116 struct sk_buff *skb;
1117 const u8 *ssid;
1118
1119 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1120 return NULL;
1121
1122 ASSERT_MGD_MTX(ifmgd);
1123
1124 if (!ifmgd->associated)
1125 return NULL;
1126
1127 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1128 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
1129 ssid + 2, ssid[1], NULL, 0);
1130
1131 return skb;
1132}
1133EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1134
1e4dcd01
JO		 1135static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1136{
1137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1138 struct ieee80211_local *local = sdata->local;
1139 u8 bssid[ETH_ALEN];
1140
1141 mutex_lock(&ifmgd->mtx);
1142 if (!ifmgd->associated) {
1143 mutex_unlock(&ifmgd->mtx);
1144 return;
1145 }
1146
1147 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1148
1149 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1150
53f73c09 1151 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1152 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1153
1154 mutex_lock(&local->mtx);
1155 ieee80211_recalc_idle(local);
1156 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1157 /*
1158 * must be outside lock due to cfg80211,
1159 * but that's not a problem.
1160 */
1161 ieee80211_send_deauth_disassoc(sdata, bssid,
1162 IEEE80211_STYPE_DEAUTH,
1163 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1164 NULL, true);
1e4dcd01
JO		 1165}
1166
1167void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1168{
1169 struct ieee80211_sub_if_data *sdata =
1170 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1171 u.mgd.beacon_connection_loss_work);
b291ba11 1172
1e4dcd01
JO		 1173 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1174 __ieee80211_connection_loss(sdata);
1175 else
1176 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1177}
1178
04de8381
KV		 1179void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1180{
1181 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1182 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1183
b5878a2d
JB		 1184 trace_api_beacon_loss(sdata);
1185
1e4dcd01
JO		 1186 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1187 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1188}
1189EXPORT_SYMBOL(ieee80211_beacon_loss);
1190
1e4dcd01
JO		 1191void ieee80211_connection_loss(struct ieee80211_vif *vif)
1192{
1193 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1194 struct ieee80211_hw *hw = &sdata->local->hw;
1195
b5878a2d
JB		 1196 trace_api_connection_loss(sdata);
1197
1e4dcd01
JO		 1198 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1199 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1200}
1201EXPORT_SYMBOL(ieee80211_connection_loss);
1202
1203
77fdaa12
JB		 1204static enum rx_mgmt_action __must_check
1205ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1206 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1207{
46900298 1208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1209 const u8 *bssid = NULL;
f0706e82
JB		 1210 u16 reason_code;
1211
f4ea83dd 1212 if (len < 24 + 2)
77fdaa12 1213 return RX_MGMT_NONE;
f0706e82 1214
77fdaa12
JB		 1215 ASSERT_MGD_MTX(ifmgd);
1216
0c1ad2ca 1217 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1218
1219 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1220
77fdaa12 1221 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1222 sdata->name, bssid, reason_code);
77fdaa12 1223
53f73c09 1224 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1225 mutex_lock(&sdata->local->mtx);
63f170e0 1226 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1227 mutex_unlock(&sdata->local->mtx);
f0706e82 1228
77fdaa12 1229 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1230}
1231
1232
77fdaa12
JB		 1233static enum rx_mgmt_action __must_check
1234ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1235 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1236{
46900298 1237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1238 u16 reason_code;
1239
f4ea83dd 1240 if (len < 24 + 2)
77fdaa12 1241 return RX_MGMT_NONE;
f0706e82 1242
77fdaa12
JB		 1243 ASSERT_MGD_MTX(ifmgd);
1244
1245 if (WARN_ON(!ifmgd->associated))
1246 return RX_MGMT_NONE;
1247
0c1ad2ca 1248 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1249 return RX_MGMT_NONE;
f0706e82
JB		 1250
1251 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1252
0ff71613 1253 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1254 sdata->name, mgmt->sa, reason_code);
f0706e82 1255
53f73c09 1256 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1257 mutex_lock(&sdata->local->mtx);
bc83b681 1258 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1259 mutex_unlock(&sdata->local->mtx);
77fdaa12 1260 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1261}
1262
1263
af6b6374
JB		 1264static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1265 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1266{
af6b6374 1267 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1269 struct ieee80211_local *local = sdata->local;
8318d78a 1270 struct ieee80211_supported_band *sband;
f0706e82 1271 struct sta_info *sta;
0c1ad2ca 1272 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1273 u8 *pos;
881d948c 1274 u32 rates, basic_rates;
af6b6374 1275 u16 capab_info, aid;
f0706e82 1276 struct ieee802_11_elems elems;
bda3933a 1277 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1278 u32 changed = 0;
5d1ec85f
JB		 1279 int i, j, err;
1280 bool have_higher_than_11mbit = false;
ae5eb026 1281 u16 ap_ht_cap_flags;
f0706e82 1282
af6b6374 1283 /* AssocResp and ReassocResp have identical structure */
f0706e82 1284
f0706e82 1285 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1286 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1287
1dd84aa2
JB		 1288 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1289 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1290 "set\n", sdata->name, aid);
1dd84aa2
JB		 1291 aid &= ~(BIT(15) | BIT(14));
1292
af6b6374
JB		 1293 pos = mgmt->u.assoc_resp.variable;
1294 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1295
f0706e82
JB		 1296 if (!elems.supp_rates) {
1297 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1298 sdata->name);
af6b6374 1299 return false;
f0706e82
JB		 1300 }
1301
46900298 1302 ifmgd->aid = aid;
f0706e82 1303
0c1ad2ca 1304 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1305 if (!sta) {
5d1ec85f
JB		 1306 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1307 " the AP\n", sdata->name);
af6b6374 1308 return false;
77fdaa12 1309 }
05e5e883 1310
5d1ec85f
JB		 1311 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1312 WLAN_STA_ASSOC_AP);
1313 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1314 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1315
60f8b39c
JB		 1316 rates = 0;
1317 basic_rates = 0;
e7480bbb 1318 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1319
60f8b39c
JB		 1320 for (i = 0; i < elems.supp_rates_len; i++) {
1321 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1322 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1323
60f8b39c
JB		 1324 if (rate > 110)
1325 have_higher_than_11mbit = true;
1326
1327 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1328 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1329 rates |= BIT(j);
d61272cb
TW		 1330 if (is_basic)
1331 basic_rates |= BIT(j);
1332 break;
1333 }
f709fc69 1334 }
f709fc69
LCC		 1335 }
1336
60f8b39c
JB		 1337 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1338 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1339 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1340
60f8b39c
JB		 1341 if (rate > 110)
1342 have_higher_than_11mbit = true;
f0706e82 1343
60f8b39c 1344 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1345 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1346 rates |= BIT(j);
d61272cb
TW		 1347 if (is_basic)
1348 basic_rates |= BIT(j);
1349 break;
1350 }
60f8b39c 1351 }
1ebebea8 1352 }
f0706e82 1353
e7480bbb 1354 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1355 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1356
1357 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1358 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1359 have_higher_than_11mbit)
1360 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1361 else
1362 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1363
ab1faead 1364 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1365 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1366 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1367
1368 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1369
4b7679a5 1370 rate_control_rate_init(sta);
f0706e82 1371
46900298 1372 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1373 set_sta_flags(sta, WLAN_STA_MFP);
1374
ddf4ac53 1375 if (elems.wmm_param)
60f8b39c 1376 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1377
5d1ec85f
JB		 1378 err = sta_info_insert(sta);
1379 sta = NULL;
1380 if (err) {
1381 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1382 " the AP (error %d)\n", sdata->name, err);
90be561b 1383 return false;
ddf4ac53
JB		 1384 }
1385
f2176d72
JO		 1386 /*
1387 * Always handle WMM once after association regardless
1388 * of the first value the AP uses. Setting -1 here has
1389 * that effect because the AP values is an unsigned
1390 * 4-bit value.
1391 */
1392 ifmgd->wmm_last_param_set = -1;
1393
ddf4ac53 1394 if (elems.wmm_param)
4ced3f74 1395 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1396 elems.wmm_param_len);
aa837e1d
JB		 1397 else
1398 ieee80211_set_wmm_default(sdata);
f0706e82 1399
e4da8c37
JB		 1400 local->oper_channel = wk->chan;
1401
ae5eb026 1402 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1403 (sdata->local->hw.queues >= 4) &&
ab1faead 1404 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1405 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1406 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1407
60f8b39c
JB		 1408 /* set AID and assoc capability,
1409 * ieee80211_set_associated() will tell the driver */
1410 bss_conf->aid = aid;
1411 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1412 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1413
d524215f
FF		 1414 /*
1415 * If we're using 4-addr mode, let the AP know that we're
1416 * doing so, so that it can create the STA VLAN on its side
1417 */
1418 if (ifmgd->use_4addr)
1419 ieee80211_send_4addr_nullfunc(local, sdata);
1420
15b7b062 1421 /*
b291ba11
JB		 1422 * Start timer to probe the connection to the AP now.
1423 * Also start the timer that will detect beacon loss.
15b7b062 1424 */
b291ba11 1425 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1426 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1427
af6b6374 1428 return true;
f0706e82
JB		 1429}
1430
1431
98c8fccf
JB		 1432static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1433 struct ieee80211_mgmt *mgmt,
1434 size_t len,
1435 struct ieee80211_rx_status *rx_status,
1436 struct ieee802_11_elems *elems,
1437 bool beacon)
1438{
1439 struct ieee80211_local *local = sdata->local;
1440 int freq;
c2b13452 1441 struct ieee80211_bss *bss;
98c8fccf 1442 struct ieee80211_channel *channel;
56007a02
JB		 1443 bool need_ps = false;
1444
1445 if (sdata->u.mgd.associated) {
1446 bss = (void *)sdata->u.mgd.associated->priv;
1447 /* not previously set so we may need to recalc */
1448 need_ps = !bss->dtim_period;
1449 }
98c8fccf
JB		 1450
1451 if (elems->ds_params && elems->ds_params_len == 1)
1452 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1453 else
1454 freq = rx_status->freq;
1455
1456 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1457
1458 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1459 return;
1460
98c8fccf 1461 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1462 channel, beacon);
77fdaa12
JB		 1463 if (bss)
1464 ieee80211_rx_bss_put(local, bss);
1465
1466 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1467 return;
1468
56007a02
JB		 1469 if (need_ps) {
1470 mutex_lock(&local->iflist_mtx);
1471 ieee80211_recalc_ps(local, -1);
1472 mutex_unlock(&local->iflist_mtx);
1473 }
1474
c481ec97 1475 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1476 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1477 ETH_ALEN) == 0)) {
c481ec97
S		 1478 struct ieee80211_channel_sw_ie *sw_elem =
1479 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1480 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1481 bss, rx_status->mactime);
c481ec97 1482 }
f0706e82
JB		 1483}
1484
1485
f698d856 1486static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1487 struct sk_buff *skb)
f0706e82 1488{
af6b6374 1489 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1490 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1491 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1492 size_t baselen, len = skb->len;
ae6a44e3
EK		 1493 struct ieee802_11_elems elems;
1494
15b7b062
KV		 1495 ifmgd = &sdata->u.mgd;
1496
77fdaa12
JB		 1497 ASSERT_MGD_MTX(ifmgd);
1498
47846c9b 1499 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1500 return; /* ignore ProbeResp to foreign address */
1501
ae6a44e3
EK		 1502 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1503 if (baselen > len)
1504 return;
1505
1506 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1507 &elems);
1508
98c8fccf 1509 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1510
77fdaa12 1511 if (ifmgd->associated &&
0c1ad2ca 1512 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1513 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1514 IEEE80211_STA_CONNECTION_POLL)) {
1515 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1516 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1517 mutex_lock(&sdata->local->iflist_mtx);
1518 ieee80211_recalc_ps(sdata->local, -1);
1519 mutex_unlock(&sdata->local->iflist_mtx);
7bdfcaaf
JO		 1520
1521 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1522 return;
1523
b291ba11
JB		 1524 /*
1525 * We've received a probe response, but are not sure whether
1526 * we have or will be receiving any beacons or data, so let's
1527 * schedule the timers again, just in case.
1528 */
d3a910a8 1529 ieee80211_sta_reset_beacon_monitor(sdata);
7bdfcaaf 1530
b291ba11
JB		 1531 mod_timer(&ifmgd->conn_mon_timer,
1532 round_jiffies_up(jiffies +
1533 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1534 }
f0706e82
JB		 1535}
1536
d91f36db
JB		 1537/*
1538 * This is the canonical list of information elements we care about,
1539 * the filter code also gives us all changes to the Microsoft OUI
1540 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1541 *
1542 * We implement beacon filtering in software since that means we can
1543 * avoid processing the frame here and in cfg80211, and userspace
1544 * will not be able to tell whether the hardware supports it or not.
1545 *
1546 * XXX: This list needs to be dynamic -- userspace needs to be able to
1547 * add items it requires. It also needs to be able to tell us to
1548 * look out for other vendor IEs.
1549 */
1550static const u64 care_about_ies =
1d4df3a5
JB		 1551 (1ULL << WLAN_EID_COUNTRY) |
1552 (1ULL << WLAN_EID_ERP_INFO) |
1553 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1554 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1555 (1ULL << WLAN_EID_HT_CAPABILITY) |
1556 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1557
f698d856 1558static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1559 struct ieee80211_mgmt *mgmt,
1560 size_t len,
1561 struct ieee80211_rx_status *rx_status)
1562{
d91f36db 1563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1564 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1565 size_t baselen;
1566 struct ieee802_11_elems elems;
f698d856 1567 struct ieee80211_local *local = sdata->local;
471b3efd 1568 u32 changed = 0;
d91f36db 1569 bool erp_valid, directed_tim = false;
7a5158ef 1570 u8 erp_value = 0;
d91f36db 1571 u32 ncrc;
77fdaa12
JB		 1572 u8 *bssid;
1573
1574 ASSERT_MGD_MTX(ifmgd);
f0706e82 1575
ae6a44e3
EK		 1576 /* Process beacon from the current BSS */
1577 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1578 if (baselen > len)
1579 return;
1580
d91f36db 1581 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1582 return;
f0706e82 1583
b291ba11
JB		 1584 /*
1585 * We might have received a number of frames, among them a
1586 * disassoc frame and a beacon...
1587 */
1588 if (!ifmgd->associated)
77fdaa12
JB		 1589 return;
1590
0c1ad2ca 1591 bssid = ifmgd->associated->bssid;
77fdaa12 1592
b291ba11
JB		 1593 /*
1594 * And in theory even frames from a different AP we were just
1595 * associated to a split-second ago!
1596 */
1597 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1598 return;
1599
17e4ec14
JM		 1600 /* Track average RSSI from the Beacon frames of the current AP */
1601 ifmgd->last_beacon_signal = rx_status->signal;
1602 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1603 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1604 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1605 ifmgd->last_cqm_event_signal = 0;
391a200a 1606 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1607 } else {
1608 ifmgd->ave_beacon_signal =
1609 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1610 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1611 ifmgd->ave_beacon_signal) / 16;
391a200a 1612 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1613 }
1614 if (bss_conf->cqm_rssi_thold &&
391a200a 1615 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1616 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1617 int sig = ifmgd->ave_beacon_signal / 16;
1618 int last_event = ifmgd->last_cqm_event_signal;
1619 int thold = bss_conf->cqm_rssi_thold;
1620 int hyst = bss_conf->cqm_rssi_hyst;
1621 if (sig < thold &&
1622 (last_event == 0 || sig < last_event - hyst)) {
1623 ifmgd->last_cqm_event_signal = sig;
1624 ieee80211_cqm_rssi_notify(
1625 &sdata->vif,
1626 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1627 GFP_KERNEL);
1628 } else if (sig > thold &&
1629 (last_event == 0 || sig > last_event + hyst)) {
1630 ifmgd->last_cqm_event_signal = sig;
1631 ieee80211_cqm_rssi_notify(
1632 &sdata->vif,
1633 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1634 GFP_KERNEL);
1635 }
1636 }
1637
b291ba11 1638 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1639#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1640 if (net_ratelimit()) {
1641 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1642 "to a received beacon\n", sdata->name);
92778180
JM		 1643 }
1644#endif
b291ba11 1645 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1646 mutex_lock(&local->iflist_mtx);
1647 ieee80211_recalc_ps(local, -1);
1648 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1649 }
1650
b291ba11
JB		 1651 /*
1652 * Push the beacon loss detection into the future since
1653 * we are processing a beacon from the AP just now.
1654 */
d3a910a8 1655 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1656
d91f36db
JB		 1657 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1658 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1659 len - baselen, &elems,
1660 care_about_ies, ncrc);
1661
1662 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1663 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1664 ifmgd->aid);
d91f36db 1665
d8ec4433 1666 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1667 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1668 true);
d91f36db 1669
4ced3f74 1670 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1671 elems.wmm_param_len);
1672 }
fe3fa827 1673
25c9c875 1674 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1675 if (directed_tim) {
572e0012
KV		 1676 if (local->hw.conf.dynamic_ps_timeout > 0) {
1677 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1678 ieee80211_hw_config(local,
1679 IEEE80211_CONF_CHANGE_PS);
1680 ieee80211_send_nullfunc(local, sdata, 0);
1681 } else {
1682 local->pspolling = true;
1683
1684 /*
1685 * Here is assumed that the driver will be
1686 * able to send ps-poll frame and receive a
1687 * response even though power save mode is
1688 * enabled, but some drivers might require
1689 * to disable power save here. This needs
1690 * to be investigated.
1691 */
1692 ieee80211_send_pspoll(local, sdata);
1693 }
a97b77b9
VN		 1694 }
1695 }
7a5158ef 1696
d8ec4433 1697 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1698 return;
1699 ifmgd->beacon_crc = ncrc;
d8ec4433 1700 ifmgd->beacon_crc_valid = true;
30196673 1701
7a5158ef
JB		 1702 if (elems.erp_info && elems.erp_info_len >= 1) {
1703 erp_valid = true;
1704 erp_value = elems.erp_info[0];
1705 } else {
1706 erp_valid = false;
50c4afb9 1707 }
7a5158ef
JB		 1708 changed |= ieee80211_handle_bss_capability(sdata,
1709 le16_to_cpu(mgmt->u.beacon.capab_info),
1710 erp_valid, erp_value);
f0706e82 1711
d3c990fb 1712
53d6f81c 1713 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1714 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1715 struct sta_info *sta;
1716 struct ieee80211_supported_band *sband;
1717 u16 ap_ht_cap_flags;
1718
1719 rcu_read_lock();
1720
abe60632 1721 sta = sta_info_get(sdata, bssid);
77fdaa12 1722 if (WARN_ON(!sta)) {
ae5eb026
JB		 1723 rcu_read_unlock();
1724 return;
1725 }
1726
1727 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1728
1729 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1730 elems.ht_cap_elem, &sta->sta.ht_cap);
1731
1732 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1733
1734 rcu_read_unlock();
1735
1736 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1737 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1738 }
1739
8b19e6ca 1740 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1741 if (elems.country_elem) {
a8302de9
VT		 1742 /* TODO: IBSS also needs this */
1743 if (elems.pwr_constr_elem)
1744 ieee80211_handle_pwr_constr(sdata,
1745 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1746 elems.pwr_constr_elem,
1747 elems.pwr_constr_elem_len);
3f2355cb
LR		 1748 }
1749
471b3efd 1750 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1751}
1752
1fa57d01
JB		 1753void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1754 struct sk_buff *skb)
f0706e82 1755{
77fdaa12 1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1757 struct ieee80211_rx_status *rx_status;
f0706e82 1758 struct ieee80211_mgmt *mgmt;
77fdaa12 1759 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1760 u16 fc;
1761
f0706e82
JB		 1762 rx_status = (struct ieee80211_rx_status *) skb->cb;
1763 mgmt = (struct ieee80211_mgmt *) skb->data;
1764 fc = le16_to_cpu(mgmt->frame_control);
1765
77fdaa12
JB		 1766 mutex_lock(&ifmgd->mtx);
1767
1768 if (ifmgd->associated &&
0c1ad2ca 1769 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1770 switch (fc & IEEE80211_FCTL_STYPE) {
1771 case IEEE80211_STYPE_BEACON:
1772 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1773 rx_status);
1774 break;
1775 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1776 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1777 break;
1778 case IEEE80211_STYPE_DEAUTH:
63f170e0 1779 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1780 break;
1781 case IEEE80211_STYPE_DISASSOC:
1782 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1783 break;
1784 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1785 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1786 case WLAN_CATEGORY_SPECTRUM_MGMT:
1787 ieee80211_sta_process_chanswitch(sdata,
1788 &mgmt->u.action.u.chan_switch.sw_elem,
1789 (void *)ifmgd->associated->priv,
1790 rx_status->mactime);
1791 break;
1792 }
77fdaa12
JB		 1793 }
1794 mutex_unlock(&ifmgd->mtx);
1795
1796 switch (rma) {
1797 case RX_MGMT_NONE:
1798 /* no action */
1799 break;
1800 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1801 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1802 break;
1803 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1804 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1805 break;
1806 default:
1807 WARN(1, "unexpected: %d", rma);
1808 }
36b3a628 1809 return;
77fdaa12
JB		 1810 }
1811
77fdaa12
JB		 1812 mutex_unlock(&ifmgd->mtx);
1813
63f170e0 1814 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1815 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1816 struct ieee80211_local *local = sdata->local;
1817 struct ieee80211_work *wk;
1818
a1699b75 1819 mutex_lock(&local->mtx);
b054b747
JB		 1820 list_for_each_entry(wk, &local->work_list, list) {
1821 if (wk->sdata != sdata)
1822 continue;
1823
e5b900d2
JB		 1824 if (wk->type != IEEE80211_WORK_ASSOC &&
1825 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1826 continue;
1827
1828 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1829 continue;
1830 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1831 continue;
1832
1833 /*
1834 * Printing the message only here means we can't
1835 * spuriously print it, but it also means that it
1836 * won't be printed when the frame comes in before
1837 * we even tried to associate or in similar cases.
1838 *
1839 * Ultimately, I suspect cfg80211 should print the
1840 * messages instead.
1841 */
1842 printk(KERN_DEBUG
1843 "%s: deauthenticated from %pM (Reason: %u)\n",
1844 sdata->name, mgmt->bssid,
1845 le16_to_cpu(mgmt->u.deauth.reason_code));
1846
1847 list_del_rcu(&wk->list);
1848 free_work(wk);
1849 break;
1850 }
a1699b75 1851 mutex_unlock(&local->mtx);
f0706e82 1852
ce470613 1853 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1854 }
f0706e82
JB		 1855}
1856
9c6bd790 1857static void ieee80211_sta_timer(unsigned long data)
f0706e82 1858{
60f8b39c
JB		 1859 struct ieee80211_sub_if_data *sdata =
1860 (struct ieee80211_sub_if_data *) data;
46900298 1861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1862 struct ieee80211_local *local = sdata->local;
f0706e82 1863
5bb644a0
JB		 1864 if (local->quiescing) {
1865 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1866 return;
1867 }
1868
64592c8f 1869 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1870}
1871
1fa57d01 1872void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1873{
9c6bd790 1874 struct ieee80211_local *local = sdata->local;
1fa57d01 1875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1876
77fdaa12
JB		 1877 /* then process the rest of the work */
1878 mutex_lock(&ifmgd->mtx);
1879
b291ba11
JB		 1880 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1881 IEEE80211_STA_CONNECTION_POLL) &&
1882 ifmgd->associated) {
a43abf29
ML		 1883 u8 bssid[ETH_ALEN];
1884
0c1ad2ca 1885 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11
JB		 1886 if (time_is_after_jiffies(ifmgd->probe_timeout))
1887 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 1888
1889 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1890#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 1891 wiphy_debug(local->hw.wiphy,
1892 "%s: No probe response from AP %pM"
1893 " after %dms, try %d\n",
1894 sdata->name,
1895 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ,
1896 ifmgd->probe_send_count);
a43abf29
ML		 1897#endif
1898 ieee80211_mgd_probe_ap_send(sdata);
1899 } else {
b291ba11
JB		 1900 /*
1901 * We actually lost the connection ... or did we?
1902 * Let's make sure!
1903 */
1904 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1905 IEEE80211_STA_BEACON_POLL);
b38afa87
BG		 1906 wiphy_debug(local->hw.wiphy,
1907 "%s: No probe response from AP %pM"
1908 " after %dms, disconnecting.\n",
1909 sdata->name,
1910 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
53f73c09 1911 ieee80211_set_disassoc(sdata, true, true);
b291ba11 1912 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1913 mutex_lock(&local->mtx);
1914 ieee80211_recalc_idle(local);
1915 mutex_unlock(&local->mtx);
b291ba11
JB		 1916 /*
1917 * must be outside lock due to cfg80211,
1918 * but that's not a problem.
1919 */
1920 ieee80211_send_deauth_disassoc(sdata, bssid,
1921 IEEE80211_STYPE_DEAUTH,
1922 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1923 NULL, true);
b291ba11
JB		 1924 mutex_lock(&ifmgd->mtx);
1925 }
1926 }
1927
77fdaa12 1928 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 1929}
1930
b291ba11
JB		 1931static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1932{
1933 struct ieee80211_sub_if_data *sdata =
1934 (struct ieee80211_sub_if_data *) data;
1935 struct ieee80211_local *local = sdata->local;
1936
1937 if (local->quiescing)
1938 return;
1939
1e4dcd01
JO		 1940 ieee80211_queue_work(&sdata->local->hw,
1941 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 1942}
1943
1944static void ieee80211_sta_conn_mon_timer(unsigned long data)
1945{
1946 struct ieee80211_sub_if_data *sdata =
1947 (struct ieee80211_sub_if_data *) data;
1948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1949 struct ieee80211_local *local = sdata->local;
1950
1951 if (local->quiescing)
1952 return;
1953
42935eca 1954 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 1955}
1956
1957static void ieee80211_sta_monitor_work(struct work_struct *work)
1958{
1959 struct ieee80211_sub_if_data *sdata =
1960 container_of(work, struct ieee80211_sub_if_data,
1961 u.mgd.monitor_work);
1962
1963 ieee80211_mgd_probe_ap(sdata, false);
1964}
1965
9c6bd790
JB		 1966static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1967{
ad935687 1968 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 1969 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1970 IEEE80211_STA_CONNECTION_POLL);
ad935687 1971
b291ba11 1972 /* let's probe the connection once */
42935eca 1973 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 1974 &sdata->u.mgd.monitor_work);
1975 /* and do all the other regular work too */
64592c8f 1976 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 1977 }
9c6bd790 1978}
f0706e82 1979
5bb644a0
JB		 1980#ifdef CONFIG_PM
1981void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1982{
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984
1985 /*
1986 * we need to use atomic bitops for the running bits
1987 * only because both timers might fire at the same
1988 * time -- the code here is properly synchronised.
1989 */
1990
d1f5b7a3
JB		 1991 cancel_work_sync(&ifmgd->request_smps_work);
1992
1e4dcd01 1993 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 1994 if (del_timer_sync(&ifmgd->timer))
1995 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1996
1997 cancel_work_sync(&ifmgd->chswitch_work);
1998 if (del_timer_sync(&ifmgd->chswitch_timer))
1999 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2000
2001 cancel_work_sync(&ifmgd->monitor_work);
2002 /* these will just be re-established on connection */
2003 del_timer_sync(&ifmgd->conn_mon_timer);
2004 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2005}
2006
2007void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2008{
2009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2010
2011 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2012 add_timer(&ifmgd->timer);
2013 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2014 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2015 ieee80211_sta_reset_beacon_monitor(sdata);
5bb644a0
JB		 2016}
2017#endif
2018
9c6bd790
JB		 2019/* interface setup */
2020void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2021{
46900298 2022 struct ieee80211_if_managed *ifmgd;
988c0f72 2023
46900298 2024 ifmgd = &sdata->u.mgd;
b291ba11 2025 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2026 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2027 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2028 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2029 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2030 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2031 (unsigned long) sdata);
b291ba11
JB		 2032 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2033 (unsigned long) sdata);
2034 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2035 (unsigned long) sdata);
46900298 2036 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2037 (unsigned long) sdata);
9c6bd790 2038
ab1faead 2039 ifmgd->flags = 0;
bbbdff9e 2040
77fdaa12 2041 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2042
2043 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2044 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2045 else
2046 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2047}
2048
77fdaa12
JB		 2049/* scan finished notification */
2050void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2051{
77fdaa12 2052 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2053
77fdaa12
JB		 2054 /* Restart STA timers */
2055 rcu_read_lock();
2056 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2057 ieee80211_restart_sta_timer(sdata);
2058 rcu_read_unlock();
2059}
60f8b39c 2060
77fdaa12
JB		 2061int ieee80211_max_network_latency(struct notifier_block *nb,
2062 unsigned long data, void *dummy)
2063{
2064 s32 latency_usec = (s32) data;
2065 struct ieee80211_local *local =
2066 container_of(nb, struct ieee80211_local,
2067 network_latency_notifier);
1fa6f4af 2068
77fdaa12
JB		 2069 mutex_lock(&local->iflist_mtx);
2070 ieee80211_recalc_ps(local, latency_usec);
2071 mutex_unlock(&local->iflist_mtx);
dfe67012 2072
77fdaa12 2073 return 0;
9c6bd790
JB		 2074}
2075
77fdaa12 2076/* config hooks */
af6b6374
JB		 2077static enum work_done_result
2078ieee80211_probe_auth_done(struct ieee80211_work *wk,
2079 struct sk_buff *skb)
2080{
2081 if (!skb) {
2082 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2083 return WORK_DONE_DESTROY;
2084 }
2085
2086 if (wk->type == IEEE80211_WORK_AUTH) {
2087 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2088 return WORK_DONE_DESTROY;
2089 }
2090
2091 mutex_lock(&wk->sdata->u.mgd.mtx);
2092 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2093 mutex_unlock(&wk->sdata->u.mgd.mtx);
2094
2095 wk->type = IEEE80211_WORK_AUTH;
2096 wk->probe_auth.tries = 0;
2097 return WORK_DONE_REQUEUE;
2098}
2099
77fdaa12
JB		 2100int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2101 struct cfg80211_auth_request *req)
9c6bd790 2102{
77fdaa12 2103 const u8 *ssid;
f679f65d 2104 struct ieee80211_work *wk;
77fdaa12 2105 u16 auth_alg;
9c6bd790 2106
d5cdfacb
JM		 2107 if (req->local_state_change)
2108 return 0; /* no need to update mac80211 state */
2109
77fdaa12
JB		 2110 switch (req->auth_type) {
2111 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2112 auth_alg = WLAN_AUTH_OPEN;
2113 break;
2114 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2115 if (IS_ERR(sdata->local->wep_tx_tfm))
2116 return -EOPNOTSUPP;
77fdaa12
JB		 2117 auth_alg = WLAN_AUTH_SHARED_KEY;
2118 break;
2119 case NL80211_AUTHTYPE_FT:
2120 auth_alg = WLAN_AUTH_FT;
2121 break;
2122 case NL80211_AUTHTYPE_NETWORK_EAP:
2123 auth_alg = WLAN_AUTH_LEAP;
2124 break;
2125 default:
2126 return -EOPNOTSUPP;
60f8b39c 2127 }
77fdaa12
JB		 2128
2129 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2130 if (!wk)
9c6bd790 2131 return -ENOMEM;
77fdaa12 2132
5e124bd5 2133 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2134
2135 if (req->ie && req->ie_len) {
2136 memcpy(wk->ie, req->ie, req->ie_len);
2137 wk->ie_len = req->ie_len;
9c6bd790 2138 }
77fdaa12 2139
fffd0934 2140 if (req->key && req->key_len) {
af6b6374
JB		 2141 wk->probe_auth.key_len = req->key_len;
2142 wk->probe_auth.key_idx = req->key_idx;
2143 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2144 }
2145
77fdaa12 2146 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2147 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2148 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2149
af6b6374
JB		 2150 wk->probe_auth.algorithm = auth_alg;
2151 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2152
070bb547
JB		 2153 /* if we already have a probe, don't probe again */
2154 if (req->bss->proberesp_ies)
2155 wk->type = IEEE80211_WORK_AUTH;
2156 else
2157 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2158 wk->chan = req->bss->channel;
af6b6374
JB		 2159 wk->sdata = sdata;
2160 wk->done = ieee80211_probe_auth_done;
77fdaa12 2161
af6b6374 2162 ieee80211_add_work(wk);
9c6bd790 2163 return 0;
60f8b39c
JB		 2164}
2165
af6b6374
JB		 2166static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2167 struct sk_buff *skb)
2168{
2169 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2170 struct ieee80211_rx_status *rx_status;
2171 struct ieee802_11_elems elems;
af6b6374
JB		 2172 u16 status;
2173
2174 if (!skb) {
2175 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2176 return WORK_DONE_DESTROY;
2177 }
2178
e5b900d2
JB		 2179 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2180 mutex_lock(&wk->sdata->u.mgd.mtx);
2181 rx_status = (void *) skb->cb;
2182 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2183 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2184 &elems, true);
2185 mutex_unlock(&wk->sdata->u.mgd.mtx);
2186
2187 wk->type = IEEE80211_WORK_ASSOC;
2188 /* not really done yet */
2189 return WORK_DONE_REQUEUE;
2190 }
2191
af6b6374
JB		 2192 mgmt = (void *)skb->data;
2193 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2194
2195 if (status == WLAN_STATUS_SUCCESS) {
2196 mutex_lock(&wk->sdata->u.mgd.mtx);
2197 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2198 mutex_unlock(&wk->sdata->u.mgd.mtx);
2199 /* oops -- internal error -- send timeout for now */
2200 cfg80211_send_assoc_timeout(wk->sdata->dev,
2201 wk->filter_ta);
2202 return WORK_DONE_DESTROY;
2203 }
68542962
JO		 2204
2205 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2206 }
2207
2208 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2209 return WORK_DONE_DESTROY;
2210}
2211
77fdaa12
JB		 2212int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2213 struct cfg80211_assoc_request *req)
f0706e82 2214{
77fdaa12 2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2216 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2217 struct ieee80211_work *wk;
63f170e0 2218 const u8 *ssid;
af6b6374 2219 int i;
f0706e82 2220
77fdaa12 2221 mutex_lock(&ifmgd->mtx);
af6b6374 2222 if (ifmgd->associated) {
9c87ba67
JM		 2223 if (!req->prev_bssid ||
2224 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2225 ETH_ALEN)) {
2226 /*
2227 * We are already associated and the request was not a
2228 * reassociation request from the current BSS, so
2229 * reject it.
2230 */
2231 mutex_unlock(&ifmgd->mtx);
2232 return -EALREADY;
2233 }
2234
2235 /* Trying to reassociate - clear previous association state */
53f73c09 2236 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2237 }
2238 mutex_unlock(&ifmgd->mtx);
77fdaa12 2239
63f170e0 2240 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2241 if (!wk)
2242 return -ENOMEM;
77fdaa12 2243
77fdaa12 2244 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2245 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2246
d8ec4433
JO		 2247 ifmgd->beacon_crc_valid = false;
2248
77fdaa12
JB		 2249 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2250 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2251 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2252 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2253 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2254
77fdaa12
JB		 2255
2256 if (req->ie && req->ie_len) {
2257 memcpy(wk->ie, req->ie, req->ie_len);
2258 wk->ie_len = req->ie_len;
2259 } else
2260 wk->ie_len = 0;
2261
0c1ad2ca 2262 wk->assoc.bss = req->bss;
f679f65d 2263
af6b6374 2264 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2265
af6b6374
JB		 2266 /* new association always uses requested smps mode */
2267 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2268 if (ifmgd->powersave)
2269 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2270 else
2271 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2272 } else
2273 ifmgd->ap_smps = ifmgd->req_smps;
2274
2275 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2276 /*
2277 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2278 * We still associate in non-HT mode (11a/b/g) if any one of these
2279 * ciphers is configured as pairwise.
2280 * We can set this to true for non-11n hardware, that'll be checked
2281 * separately along with the peer capabilities.
2282 */
af6b6374 2283 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2284 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2285 wk->assoc.wmm_used = bss->wmm_used;
2286 wk->assoc.supp_rates = bss->supp_rates;
2287 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2288 wk->assoc.ht_information_ie =
2289 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2290
ab13315a
KV		 2291 if (bss->wmm_used && bss->uapsd_supported &&
2292 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2293 wk->assoc.uapsd_used = true;
2294 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2295 } else {
2296 wk->assoc.uapsd_used = false;
2297 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2298 }
2299
63f170e0 2300 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2301 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2302 wk->assoc.ssid_len = ssid[1];
63f170e0 2303
77fdaa12 2304 if (req->prev_bssid)
f679f65d 2305 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2306
f679f65d 2307 wk->chan = req->bss->channel;
af6b6374
JB		 2308 wk->sdata = sdata;
2309 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2310 if (!bss->dtim_period &&
2311 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2312 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2313 else
2314 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2315
2316 if (req->use_mfp) {
2317 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2318 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2319 } else {
2320 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2321 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2322 }
2323
2324 if (req->crypto.control_port)
2325 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2326 else
2327 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2328
a621fa4d
JB		 2329 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2330 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2331
af6b6374
JB		 2332 ieee80211_add_work(wk);
2333 return 0;
f0706e82
JB		 2334}
2335
77fdaa12 2336int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2337 struct cfg80211_deauth_request *req,
2338 void *cookie)
f0706e82 2339{
af6b6374 2340 struct ieee80211_local *local = sdata->local;
46900298 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2342 struct ieee80211_work *wk;
05e48e8e
JM		 2343 u8 bssid[ETH_ALEN];
2344 bool assoc_bss = false;
f0706e82 2345
77fdaa12
JB		 2346 mutex_lock(&ifmgd->mtx);
2347
05e48e8e 2348 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2349 if (ifmgd->associated == req->bss) {
53f73c09 2350 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2351 mutex_unlock(&ifmgd->mtx);
05e48e8e 2352 assoc_bss = true;
af6b6374
JB		 2353 } else {
2354 bool not_auth_yet = false;
f0706e82 2355
a58ce43f 2356 mutex_unlock(&ifmgd->mtx);
a58ce43f 2357
a1699b75 2358 mutex_lock(&local->mtx);
af6b6374 2359 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2360 if (wk->sdata != sdata)
af6b6374 2361 continue;
29165e4c
JB		 2362
2363 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2364 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2365 wk->type != IEEE80211_WORK_ASSOC &&
2366 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2367 continue;
2368
af6b6374
JB		 2369 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2370 continue;
29165e4c
JB		 2371
2372 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2373 list_del_rcu(&wk->list);
af6b6374
JB		 2374 free_work(wk);
2375 break;
2376 }
a1699b75 2377 mutex_unlock(&local->mtx);
af6b6374
JB		 2378
2379 /*
2380 * If somebody requests authentication and we haven't
2381 * sent out an auth frame yet there's no need to send
2382 * out a deauth frame either. If the state was PROBE,
2383 * then this is the case. If it's AUTH we have sent a
2384 * frame, and if it's IDLE we have completed the auth
2385 * process already.
2386 */
2387 if (not_auth_yet) {
2388 __cfg80211_auth_canceled(sdata->dev, bssid);
2389 return 0;
2390 }
2391 }
77fdaa12 2392
0ff71613 2393 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2394 sdata->name, bssid, req->reason_code);
0ff71613 2395
d5cdfacb
JM		 2396 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2397 req->reason_code, cookie,
2398 !req->local_state_change);
05e48e8e
JM		 2399 if (assoc_bss)
2400 sta_info_destroy_addr(sdata, bssid);
f0706e82 2401
7da7cc1d 2402 mutex_lock(&sdata->local->mtx);
bc83b681 2403 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2404 mutex_unlock(&sdata->local->mtx);
bc83b681 2405
f0706e82
JB		 2406 return 0;
2407}
84363e6e 2408
77fdaa12 2409int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2410 struct cfg80211_disassoc_request *req,
2411 void *cookie)
9c6bd790 2412{
77fdaa12 2413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2414 u8 bssid[ETH_ALEN];
9c6bd790 2415
77fdaa12 2416 mutex_lock(&ifmgd->mtx);
10f644a4 2417
8d8b261a
JB		 2418 /*
2419 * cfg80211 should catch this ... but it's racy since
2420 * we can receive a disassoc frame, process it, hand it
2421 * to cfg80211 while that's in a locked section already
2422 * trying to tell us that the user wants to disconnect.
2423 */
0c1ad2ca 2424 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2425 mutex_unlock(&ifmgd->mtx);
2426 return -ENOLINK;
2427 }
2428
0ff71613 2429 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2430 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2431
e69e95db 2432 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2433 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2434
2435 mutex_unlock(&ifmgd->mtx);
10f644a4 2436
77fdaa12 2437 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2438 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2439 cookie, !req->local_state_change);
e69e95db 2440 sta_info_destroy_addr(sdata, bssid);
bc83b681 2441
7da7cc1d 2442 mutex_lock(&sdata->local->mtx);
bc83b681 2443 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2444 mutex_unlock(&sdata->local->mtx);
bc83b681 2445
10f644a4
JB		 2446 return 0;
2447}
026331c4 2448
a97c13c3
JO		 2449void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2450 enum nl80211_cqm_rssi_threshold_event rssi_event,
2451 gfp_t gfp)
2452{
2453 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2454
b5878a2d
JB		 2455 trace_api_cqm_rssi_notify(sdata, rssi_event);
2456
a97c13c3
JO		 2457 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2458}
2459EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Ubuntu Jammy Linux kernel mirror