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mac80211: add helper for reseting the connection monitor
[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
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
b291ba11
JB		 118static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
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{
129 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
130 return;
131
132 mod_timer(&sdata->u.mgd.conn_mon_timer,
133 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
134}
135
5484e237 136static int ecw2cw(int ecw)
60f8b39c 137{
5484e237 138 return (1 << ecw) - 1;
60f8b39c
JB		 139}
140
d5522e03
JB		 141/*
142 * ieee80211_enable_ht should be called only after the operating band
143 * has been determined as ht configuration depends on the hw's
144 * HT abilities for a specific band.
145 */
146static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
147 struct ieee80211_ht_info *hti,
77fdaa12 148 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 149{
150 struct ieee80211_local *local = sdata->local;
151 struct ieee80211_supported_band *sband;
d5522e03
JB		 152 struct sta_info *sta;
153 u32 changed = 0;
9ed6bcce 154 u16 ht_opmode;
0aaffa9b
JB		 155 bool enable_ht = true;
156 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 157 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
158
159 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
160
0aaffa9b
JB		 161 prev_chantype = sdata->vif.bss_conf.channel_type;
162
d5522e03
JB		 163 /* HT is not supported */
164 if (!sband->ht_cap.ht_supported)
165 enable_ht = false;
166
167 /* check that channel matches the right operating channel */
168 if (local->hw.conf.channel->center_freq !=
169 ieee80211_channel_to_frequency(hti->control_chan))
170 enable_ht = false;
171
172 if (enable_ht) {
173 channel_type = NL80211_CHAN_HT20;
174
175 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
176 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
177 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
178 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
179 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 180 if (!(local->hw.conf.channel->flags &
181 IEEE80211_CHAN_NO_HT40PLUS))
182 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 183 break;
184 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 185 if (!(local->hw.conf.channel->flags &
186 IEEE80211_CHAN_NO_HT40MINUS))
187 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 188 break;
189 }
190 }
191 }
192
fe6f212c
RC		 193 if (local->tmp_channel)
194 local->tmp_channel_type = channel_type;
d5522e03 195
0aaffa9b
JB		 196 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
197 /* can only fail due to HT40+/- mismatch */
198 channel_type = NL80211_CHAN_HT20;
199 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
200 }
d5522e03 201
0aaffa9b
JB		 202 /* channel_type change automatically detected */
203 ieee80211_hw_config(local, 0);
d5522e03 204
0aaffa9b 205 if (prev_chantype != channel_type) {
d5522e03 206 rcu_read_lock();
abe60632 207 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 208 if (sta)
209 rate_control_rate_update(local, sband, sta,
4fa00437 210 IEEE80211_RC_HT_CHANGED,
0aaffa9b 211 channel_type);
d5522e03 212 rcu_read_unlock();
0aaffa9b 213 }
d5522e03 214
9ed6bcce 215 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 216
217 /* if bss configuration changed store the new one */
0aaffa9b
JB		 218 if (sdata->ht_opmode_valid != enable_ht ||
219 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
220 prev_chantype != channel_type) {
d5522e03 221 changed |= BSS_CHANGED_HT;
9ed6bcce 222 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 223 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 224 }
225
226 return changed;
227}
228
9c6bd790
JB		 229/* frame sending functions */
230
ef422bc0 231static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 232 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 233 void *cookie, bool send_frame)
9ac19a90
JB		 234{
235 struct ieee80211_local *local = sdata->local;
46900298 236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 237 struct sk_buff *skb;
238 struct ieee80211_mgmt *mgmt;
9aed3cc1 239
65fc73ac 240 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 241 if (!skb) {
ef422bc0 242 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 243 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 244 return;
245 }
246 skb_reserve(skb, local->hw.extra_tx_headroom);
247
248 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
249 memset(mgmt, 0, 24);
77fdaa12 250 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 251 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 252 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 253 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 254 skb_put(skb, 2);
ef422bc0 255 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 256 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
257
53b46b84 258 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 259 if (cookie)
260 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
261 else
262 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 263 else
ce470613
HS		 264 if (cookie)
265 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
266 else
267 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 268 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
269 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 270
271 if (send_frame)
272 ieee80211_tx_skb(sdata, skb);
273 else
274 kfree_skb(skb);
9ac19a90
JB		 275}
276
572e0012
KV		 277void ieee80211_send_pspoll(struct ieee80211_local *local,
278 struct ieee80211_sub_if_data *sdata)
279{
572e0012
KV		 280 struct ieee80211_pspoll *pspoll;
281 struct sk_buff *skb;
572e0012 282
d8cd189e
KV		 283 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
284 if (!skb)
572e0012 285 return;
572e0012 286
d8cd189e
KV		 287 pspoll = (struct ieee80211_pspoll *) skb->data;
288 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 289
62ae67be
JB		 290 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
291 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 292}
293
965bedad
JB		 294void ieee80211_send_nullfunc(struct ieee80211_local *local,
295 struct ieee80211_sub_if_data *sdata,
296 int powersave)
297{
298 struct sk_buff *skb;
d8cd189e 299 struct ieee80211_hdr_3addr *nullfunc;
965bedad 300
d8cd189e
KV		 301 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
302 if (!skb)
965bedad 303 return;
965bedad 304
d8cd189e 305 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 306 if (powersave)
d8cd189e 307 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 308
62ae67be
JB		 309 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
310 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 311}
312
d524215f
FF		 313static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
314 struct ieee80211_sub_if_data *sdata)
315{
316 struct sk_buff *skb;
317 struct ieee80211_hdr *nullfunc;
318 __le16 fc;
319
320 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
321 return;
322
323 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
324 if (!skb) {
325 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
326 "nullfunc frame\n", sdata->name);
327 return;
328 }
329 skb_reserve(skb, local->hw.extra_tx_headroom);
330
331 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
332 memset(nullfunc, 0, 30);
333 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
334 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
335 nullfunc->frame_control = fc;
336 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
337 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
338 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
339 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
340
341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
343}
344
cc32abd4
JB		 345/* spectrum management related things */
346static void ieee80211_chswitch_work(struct work_struct *work)
347{
348 struct ieee80211_sub_if_data *sdata =
349 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
351
9607e6b6 352 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 353 return;
354
77fdaa12
JB		 355 mutex_lock(&ifmgd->mtx);
356 if (!ifmgd->associated)
357 goto out;
cc32abd4
JB		 358
359 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 360 if (!sdata->local->ops->channel_switch) {
361 /* call "hw_config" only if doing sw channel switch */
362 ieee80211_hw_config(sdata->local,
363 IEEE80211_CONF_CHANGE_CHANNEL);
364 }
77fdaa12 365
cc32abd4 366 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 367 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 368
cc32abd4
JB		 369 ieee80211_wake_queues_by_reason(&sdata->local->hw,
370 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 371 out:
372 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
373 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 374}
375
5ce6e438
JB		 376void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
377{
378 struct ieee80211_sub_if_data *sdata;
379 struct ieee80211_if_managed *ifmgd;
380
381 sdata = vif_to_sdata(vif);
382 ifmgd = &sdata->u.mgd;
383
384 trace_api_chswitch_done(sdata, success);
385 if (!success) {
386 /*
387 * If the channel switch was not successful, stay
388 * around on the old channel. We currently lack
389 * good handling of this situation, possibly we
390 * should just drop the association.
391 */
392 sdata->local->csa_channel = sdata->local->oper_channel;
393 }
394
395 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
396}
397EXPORT_SYMBOL(ieee80211_chswitch_done);
398
cc32abd4
JB		 399static void ieee80211_chswitch_timer(unsigned long data)
400{
401 struct ieee80211_sub_if_data *sdata =
402 (struct ieee80211_sub_if_data *) data;
403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
404
5bb644a0
JB		 405 if (sdata->local->quiescing) {
406 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
407 return;
408 }
409
42935eca 410 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 411}
412
413void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
414 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 415 struct ieee80211_bss *bss,
416 u64 timestamp)
cc32abd4 417{
0c1ad2ca
JB		 418 struct cfg80211_bss *cbss =
419 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 420 struct ieee80211_channel *new_ch;
421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
422 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
423
77fdaa12
JB		 424 ASSERT_MGD_MTX(ifmgd);
425
426 if (!ifmgd->associated)
cc32abd4
JB		 427 return;
428
fbe9c429 429 if (sdata->local->scanning)
cc32abd4
JB		 430 return;
431
432 /* Disregard subsequent beacons if we are already running a timer
433 processing a CSA */
434
435 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
436 return;
437
438 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
439 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
440 return;
441
442 sdata->local->csa_channel = new_ch;
443
5ce6e438
JB		 444 if (sdata->local->ops->channel_switch) {
445 /* use driver's channel switch callback */
446 struct ieee80211_channel_switch ch_switch;
447 memset(&ch_switch, 0, sizeof(ch_switch));
448 ch_switch.timestamp = timestamp;
449 if (sw_elem->mode) {
450 ch_switch.block_tx = true;
451 ieee80211_stop_queues_by_reason(&sdata->local->hw,
452 IEEE80211_QUEUE_STOP_REASON_CSA);
453 }
454 ch_switch.channel = new_ch;
455 ch_switch.count = sw_elem->count;
456 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
457 drv_channel_switch(sdata->local, &ch_switch);
458 return;
459 }
460
461 /* channel switch handled in software */
cc32abd4 462 if (sw_elem->count <= 1) {
42935eca 463 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 464 } else {
9feaddc7
WYG		 465 if (sw_elem->mode)
466 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 467 IEEE80211_QUEUE_STOP_REASON_CSA);
468 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
469 mod_timer(&ifmgd->chswitch_timer,
470 jiffies +
471 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 472 cbss->beacon_interval));
cc32abd4
JB		 473 }
474}
475
476static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
477 u16 capab_info, u8 *pwr_constr_elem,
478 u8 pwr_constr_elem_len)
479{
480 struct ieee80211_conf *conf = &sdata->local->hw.conf;
481
482 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
483 return;
484
485 /* Power constraint IE length should be 1 octet */
486 if (pwr_constr_elem_len != 1)
487 return;
488
489 if ((*pwr_constr_elem <= conf->channel->max_power) &&
490 (*pwr_constr_elem != sdata->local->power_constr_level)) {
491 sdata->local->power_constr_level = *pwr_constr_elem;
492 ieee80211_hw_config(sdata->local, 0);
493 }
494}
495
f90754c1
JO		 496void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
497{
498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
499 struct ieee80211_local *local = sdata->local;
500 struct ieee80211_conf *conf = &local->hw.conf;
501
502 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
503 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
504 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
505
506 local->disable_dynamic_ps = false;
507 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
508}
509EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
510
511void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
512{
513 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
514 struct ieee80211_local *local = sdata->local;
515 struct ieee80211_conf *conf = &local->hw.conf;
516
517 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
518 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
519 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
520
521 local->disable_dynamic_ps = true;
522 conf->dynamic_ps_timeout = 0;
523 del_timer_sync(&local->dynamic_ps_timer);
524 ieee80211_queue_work(&local->hw,
525 &local->dynamic_ps_enable_work);
526}
527EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
528
965bedad
JB		 529/* powersave */
530static void ieee80211_enable_ps(struct ieee80211_local *local,
531 struct ieee80211_sub_if_data *sdata)
532{
533 struct ieee80211_conf *conf = &local->hw.conf;
534
d5edaedc
JB		 535 /*
536 * If we are scanning right now then the parameters will
537 * take effect when scan finishes.
538 */
fbe9c429 539 if (local->scanning)
d5edaedc
JB		 540 return;
541
965bedad
JB		 542 if (conf->dynamic_ps_timeout > 0 &&
543 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
544 mod_timer(&local->dynamic_ps_timer, jiffies +
545 msecs_to_jiffies(conf->dynamic_ps_timeout));
546 } else {
547 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
548 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 549
2a13052f
JO		 550 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
551 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
552 return;
553
554 conf->flags |= IEEE80211_CONF_PS;
555 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 556 }
557}
558
559static void ieee80211_change_ps(struct ieee80211_local *local)
560{
561 struct ieee80211_conf *conf = &local->hw.conf;
562
563 if (local->ps_sdata) {
965bedad
JB		 564 ieee80211_enable_ps(local, local->ps_sdata);
565 } else if (conf->flags & IEEE80211_CONF_PS) {
566 conf->flags &= ~IEEE80211_CONF_PS;
567 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
568 del_timer_sync(&local->dynamic_ps_timer);
569 cancel_work_sync(&local->dynamic_ps_enable_work);
570 }
571}
572
573/* need to hold RTNL or interface lock */
10f644a4 574void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 575{
576 struct ieee80211_sub_if_data *sdata, *found = NULL;
577 int count = 0;
195e294d 578 int timeout;
965bedad
JB		 579
580 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
581 local->ps_sdata = NULL;
582 return;
583 }
584
af6b6374
JB		 585 if (!list_empty(&local->work_list)) {
586 local->ps_sdata = NULL;
587 goto change;
588 }
589
965bedad 590 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 591 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 592 continue;
593 if (sdata->vif.type != NL80211_IFTYPE_STATION)
594 continue;
595 found = sdata;
596 count++;
597 }
598
43f78531 599 if (count == 1 && found->u.mgd.powersave &&
af6b6374 600 found->u.mgd.associated &&
56007a02 601 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 602 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
603 IEEE80211_STA_CONNECTION_POLL))) {
f90754c1 604 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 605 s32 beaconint_us;
606
607 if (latency < 0)
ed77134b 608 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 609
610 beaconint_us = ieee80211_tu_to_usec(
611 found->vif.bss_conf.beacon_int);
612
ff616381 613 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 614 if (timeout < 0) {
615 /*
ff616381
JO		 616 * Go to full PSM if the user configures a very low
617 * latency requirement.
195e294d
JO		 618 * The 2 second value is there for compatibility until
619 * the PM_QOS_NETWORK_LATENCY is configured with real
620 * values.
621 */
ff616381 622 if (latency > 1900000000 && latency != 2000000000)
195e294d 623 timeout = 0;
ff616381
JO		 624 else
625 timeout = 100;
195e294d 626 }
f90754c1
JO		 627 local->dynamic_ps_user_timeout = timeout;
628 if (!local->disable_dynamic_ps)
629 conf->dynamic_ps_timeout =
630 local->dynamic_ps_user_timeout;
195e294d 631
04fe2037 632 if (beaconint_us > latency) {
10f644a4 633 local->ps_sdata = NULL;
04fe2037 634 } else {
56007a02 635 struct ieee80211_bss *bss;
04fe2037 636 int maxslp = 1;
56007a02 637 u8 dtimper;
04fe2037 638
56007a02
JB		 639 bss = (void *)found->u.mgd.associated->priv;
640 dtimper = bss->dtim_period;
641
642 /* If the TIM IE is invalid, pretend the value is 1 */
643 if (!dtimper)
644 dtimper = 1;
645 else if (dtimper > 1)
04fe2037
JB		 646 maxslp = min_t(int, dtimper,
647 latency / beaconint_us);
648
9ccebe61 649 local->hw.conf.max_sleep_period = maxslp;
56007a02 650 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 651 local->ps_sdata = found;
04fe2037 652 }
10f644a4 653 } else {
965bedad 654 local->ps_sdata = NULL;
10f644a4 655 }
965bedad 656
af6b6374 657 change:
965bedad
JB		 658 ieee80211_change_ps(local);
659}
660
661void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
662{
663 struct ieee80211_local *local =
664 container_of(work, struct ieee80211_local,
665 dynamic_ps_disable_work);
666
667 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
668 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
669 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
670 }
671
672 ieee80211_wake_queues_by_reason(&local->hw,
673 IEEE80211_QUEUE_STOP_REASON_PS);
674}
675
676void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
677{
678 struct ieee80211_local *local =
679 container_of(work, struct ieee80211_local,
680 dynamic_ps_enable_work);
681 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 683
684 /* can only happen when PS was just disabled anyway */
685 if (!sdata)
686 return;
687
688 if (local->hw.conf.flags & IEEE80211_CONF_PS)
689 return;
690
375177bf
VN		 691 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
692 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 693 ieee80211_send_nullfunc(local, sdata, 1);
694
2a13052f
JO		 695 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
696 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 697 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
698 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
699 local->hw.conf.flags |= IEEE80211_CONF_PS;
700 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
701 }
965bedad
JB		 702}
703
704void ieee80211_dynamic_ps_timer(unsigned long data)
705{
706 struct ieee80211_local *local = (void *) data;
707
78f1a8b7 708 if (local->quiescing || local->suspended)
5bb644a0
JB		 709 return;
710
42935eca 711 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 712}
713
60f8b39c 714/* MLME */
f698d856 715static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 716 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 717 u8 *wmm_param, size_t wmm_param_len)
718{
f0706e82 719 struct ieee80211_tx_queue_params params;
4ced3f74 720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 721 size_t left;
722 int count;
ab13315a 723 u8 *pos, uapsd_queues = 0;
f0706e82 724
e1b3ec1a
SG		 725 if (!local->ops->conf_tx)
726 return;
727
af6b6374 728 if (local->hw.queues < 4)
3434fbd3
JB		 729 return;
730
731 if (!wmm_param)
732 return;
733
f0706e82
JB		 734 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
735 return;
ab13315a
KV		 736
737 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 738 uapsd_queues = local->uapsd_queues;
ab13315a 739
f0706e82 740 count = wmm_param[6] & 0x0f;
46900298 741 if (count == ifmgd->wmm_last_param_set)
f0706e82 742 return;
46900298 743 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 744
745 pos = wmm_param + 8;
746 left = wmm_param_len - 8;
747
748 memset(&params, 0, sizeof(params));
749
f0706e82
JB		 750 local->wmm_acm = 0;
751 for (; left >= 4; left -= 4, pos += 4) {
752 int aci = (pos[0] >> 5) & 0x03;
753 int acm = (pos[0] >> 4) & 0x01;
ab13315a 754 bool uapsd = false;
f0706e82
JB		 755 int queue;
756
757 switch (aci) {
0eeb59fe 758 case 1: /* AC_BK */
e100bb64 759 queue = 3;
988c0f72 760 if (acm)
0eeb59fe 761 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 762 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
763 uapsd = true;
f0706e82 764 break;
0eeb59fe 765 case 2: /* AC_VI */
e100bb64 766 queue = 1;
988c0f72 767 if (acm)
0eeb59fe 768 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
770 uapsd = true;
f0706e82 771 break;
0eeb59fe 772 case 3: /* AC_VO */
e100bb64 773 queue = 0;
988c0f72 774 if (acm)
0eeb59fe 775 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 776 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
777 uapsd = true;
f0706e82 778 break;
0eeb59fe 779 case 0: /* AC_BE */
f0706e82 780 default:
e100bb64 781 queue = 2;
988c0f72 782 if (acm)
0eeb59fe 783 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
785 uapsd = true;
f0706e82
JB		 786 break;
787 }
788
789 params.aifs = pos[0] & 0x0f;
790 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
791 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 792 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 793 params.uapsd = uapsd;
794
f4ea83dd 795#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 796 wiphy_debug(local->hw.wiphy,
797 "WMM queue=%d aci=%d acm=%d aifs=%d "
798 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
799 queue, aci, acm,
800 params.aifs, params.cw_min, params.cw_max,
801 params.txop, params.uapsd);
3330d7be 802#endif
e1b3ec1a 803 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 804 wiphy_debug(local->hw.wiphy,
805 "failed to set TX queue parameters for queue %d\n",
806 queue);
f0706e82 807 }
e1b3ec1a
SG		 808
809 /* enable WMM or activate new settings */
4ced3f74
JB		 810 sdata->vif.bss_conf.qos = true;
811 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 812}
813
7a5158ef
JB		 814static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
815 u16 capab, bool erp_valid, u8 erp)
5628221c 816{
bda3933a 817 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 818 u32 changed = 0;
7a5158ef
JB		 819 bool use_protection;
820 bool use_short_preamble;
821 bool use_short_slot;
822
823 if (erp_valid) {
824 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
825 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
826 } else {
827 use_protection = false;
828 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
829 }
830
831 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 832 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
833 use_short_slot = true;
5628221c 834
471b3efd 835 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 836 bss_conf->use_cts_prot = use_protection;
837 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 838 }
7e9ed188 839
d43c7b37 840 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 841 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 842 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 843 }
d9430a32 844
7a5158ef 845 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 846 bss_conf->use_short_slot = use_short_slot;
847 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 848 }
849
850 return changed;
851}
852
f698d856 853static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 854 struct cfg80211_bss *cbss,
ae5eb026 855 u32 bss_info_changed)
f0706e82 856{
0c1ad2ca 857 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 858 struct ieee80211_local *local = sdata->local;
68542962 859 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 860
ae5eb026 861 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 862 /* set timing information */
68542962
JO		 863 bss_conf->beacon_int = cbss->beacon_interval;
864 bss_conf->timestamp = cbss->tsf;
5628221c 865
77fdaa12
JB		 866 bss_info_changed |= BSS_CHANGED_BEACON_INT;
867 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 868 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 869
0c1ad2ca
JB		 870 sdata->u.mgd.associated = cbss;
871 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 872
17e4ec14
JM		 873 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
874
b291ba11
JB		 875 /* just to be sure */
876 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
877 IEEE80211_STA_BEACON_POLL);
878
0183826b
JB		 879 /*
880 * Always handle WMM once after association regardless
881 * of the first value the AP uses. Setting -1 here has
882 * that effect because the AP values is an unsigned
883 * 4-bit value.
884 */
885 sdata->u.mgd.wmm_last_param_set = -1;
886
9ac19a90 887 ieee80211_led_assoc(local, 1);
9306102e 888
e5b900d2
JB		 889 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
890 bss_conf->dtim_period = bss->dtim_period;
891 else
892 bss_conf->dtim_period = 0;
893
68542962 894 bss_conf->assoc = 1;
96dd22ac
JB		 895 /*
896 * For now just always ask the driver to update the basic rateset
897 * when we have associated, we aren't checking whether it actually
898 * changed or not.
899 */
ae5eb026 900 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 901
902 /* And the BSSID changed - we're associated now */
903 bss_info_changed |= BSS_CHANGED_BSSID;
904
a97c13c3
JO		 905 /* Tell the driver to monitor connection quality (if supported) */
906 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 907 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 908 bss_info_changed |= BSS_CHANGED_CQM;
909
68542962
JO		 910 /* Enable ARP filtering */
911 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
912 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
913 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
914 }
915
ae5eb026 916 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 917
056508dc
JB		 918 mutex_lock(&local->iflist_mtx);
919 ieee80211_recalc_ps(local, -1);
0f78231b 920 ieee80211_recalc_smps(local, sdata);
056508dc 921 mutex_unlock(&local->iflist_mtx);
e0cb686f 922
8a5b33f5 923 netif_tx_start_all_queues(sdata->dev);
9ac19a90 924 netif_carrier_on(sdata->dev);
f0706e82
JB		 925}
926
e69e95db
JM		 927static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
928 bool remove_sta)
aa458d17 929{
46900298 930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 931 struct ieee80211_local *local = sdata->local;
932 struct sta_info *sta;
e0cb686f 933 u32 changed = 0, config_changed = 0;
b291ba11 934 u8 bssid[ETH_ALEN];
aa458d17 935
77fdaa12
JB		 936 ASSERT_MGD_MTX(ifmgd);
937
b291ba11
JB		 938 if (WARN_ON(!ifmgd->associated))
939 return;
940
0c1ad2ca 941 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 942
77fdaa12
JB		 943 ifmgd->associated = NULL;
944 memset(ifmgd->bssid, 0, ETH_ALEN);
945
946 /*
947 * we need to commit the associated = NULL change because the
948 * scan code uses that to determine whether this iface should
949 * go to/wake up from powersave or not -- and could otherwise
950 * wake the queues erroneously.
951 */
952 smp_mb();
953
954 /*
955 * Thus, we can only afterwards stop the queues -- to account
956 * for the case where another CPU is finishing a scan at this
957 * time -- we don't want the scan code to enable queues.
958 */
aa458d17 959
8a5b33f5 960 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 961 netif_carrier_off(sdata->dev);
962
2a419056 963 mutex_lock(&local->sta_mtx);
abe60632 964 sta = sta_info_get(sdata, bssid);
4cad6c7c 965 if (sta) {
2a419056 966 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
1fa6f4af 967 ieee80211_sta_tear_down_BA_sessions(sta);
4cad6c7c 968 }
2a419056 969 mutex_unlock(&local->sta_mtx);
aa458d17 970
f5e5bf25
TW		 971 changed |= ieee80211_reset_erp_info(sdata);
972
f5e5bf25 973 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 974 changed |= BSS_CHANGED_ASSOC;
975 sdata->vif.bss_conf.assoc = false;
f5e5bf25 976
aa837e1d
JB		 977 ieee80211_set_wmm_default(sdata);
978
4797938c 979 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 980 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 981
413ad50a
JB		 982 /* on the next assoc, re-program HT parameters */
983 sdata->ht_opmode_valid = false;
984
a8302de9
VT		 985 local->power_constr_level = 0;
986
520eb820
KV		 987 del_timer_sync(&local->dynamic_ps_timer);
988 cancel_work_sync(&local->dynamic_ps_enable_work);
989
e0cb686f
KV		 990 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
991 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
992 config_changed |= IEEE80211_CONF_CHANGE_PS;
993 }
ae5eb026 994
e0cb686f 995 ieee80211_hw_config(local, config_changed);
9cef8737 996
68542962
JO		 997 /* Disable ARP filtering */
998 if (sdata->vif.bss_conf.arp_filter_enabled) {
999 sdata->vif.bss_conf.arp_filter_enabled = false;
1000 changed |= BSS_CHANGED_ARP_FILTER;
1001 }
1002
0aaffa9b
JB		 1003 /* The BSSID (not really interesting) and HT changed */
1004 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1005 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1006
e69e95db
JM		 1007 if (remove_sta)
1008 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1009
1010 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1011 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1012 del_timer_sync(&sdata->u.mgd.timer);
1013 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1014}
f0706e82 1015
3cf335d5
KV		 1016void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1017 struct ieee80211_hdr *hdr)
1018{
1019 /*
1020 * We can postpone the mgd.timer whenever receiving unicast frames
1021 * from AP because we know that the connection is working both ways
1022 * at that time. But multicast frames (and hence also beacons) must
1023 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1024 * data idle periods for sending the periodic probe request to the
1025 * AP we're connected to.
3cf335d5 1026 */
b291ba11
JB		 1027 if (is_multicast_ether_addr(hdr->addr1))
1028 return;
1029
be099e82 1030 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1031}
f0706e82 1032
a43abf29
ML		 1033static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1034{
1035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1036 const u8 *ssid;
1037
0c1ad2ca
JB		 1038 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1039 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
a43abf29
ML		 1040 ssid + 2, ssid[1], NULL, 0);
1041
1042 ifmgd->probe_send_count++;
1043 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1044 run_again(ifmgd, ifmgd->probe_timeout);
1045}
1046
b291ba11
JB		 1047static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1048 bool beacon)
04de8381 1049{
04de8381 1050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1051 bool already = false;
34bfc411 1052
9607e6b6 1053 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1054 return;
1055
91a3bd76
LR		 1056 if (sdata->local->scanning)
1057 return;
1058
b8bc4b0a
JB		 1059 if (sdata->local->tmp_channel)
1060 return;
1061
77fdaa12
JB		 1062 mutex_lock(&ifmgd->mtx);
1063
1064 if (!ifmgd->associated)
1065 goto out;
1066
a860402d 1067#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1068 if (beacon && net_ratelimit())
1069 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1070 "- sending probe request\n", sdata->name);
a860402d 1071#endif
04de8381 1072
b291ba11
JB		 1073 /*
1074 * The driver/our work has already reported this event or the
1075 * connection monitoring has kicked in and we have already sent
1076 * a probe request. Or maybe the AP died and the driver keeps
1077 * reporting until we disassociate...
1078 *
1079 * In either case we have to ignore the current call to this
1080 * function (except for setting the correct probe reason bit)
1081 * because otherwise we would reset the timer every time and
1082 * never check whether we received a probe response!
1083 */
1084 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1085 IEEE80211_STA_CONNECTION_POLL))
1086 already = true;
1087
1088 if (beacon)
1089 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1090 else
1091 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1092
1093 if (already)
1094 goto out;
1095
4e751843
JB		 1096 mutex_lock(&sdata->local->iflist_mtx);
1097 ieee80211_recalc_ps(sdata->local, -1);
1098 mutex_unlock(&sdata->local->iflist_mtx);
1099
a43abf29
ML		 1100 ifmgd->probe_send_count = 0;
1101 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1102 out:
1103 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1104}
1105
1e4dcd01
JO		 1106static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1107{
1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109 struct ieee80211_local *local = sdata->local;
1110 u8 bssid[ETH_ALEN];
1111
1112 mutex_lock(&ifmgd->mtx);
1113 if (!ifmgd->associated) {
1114 mutex_unlock(&ifmgd->mtx);
1115 return;
1116 }
1117
1118 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1119
1120 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1121
e69e95db 1122 ieee80211_set_disassoc(sdata, true);
1e4dcd01 1123 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1124
1125 mutex_lock(&local->mtx);
1126 ieee80211_recalc_idle(local);
1127 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1128 /*
1129 * must be outside lock due to cfg80211,
1130 * but that's not a problem.
1131 */
1132 ieee80211_send_deauth_disassoc(sdata, bssid,
1133 IEEE80211_STYPE_DEAUTH,
1134 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1135 NULL, true);
1e4dcd01
JO		 1136}
1137
1138void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1139{
1140 struct ieee80211_sub_if_data *sdata =
1141 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1142 u.mgd.beacon_connection_loss_work);
b291ba11 1143
1e4dcd01
JO		 1144 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1145 __ieee80211_connection_loss(sdata);
1146 else
1147 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1148}
1149
04de8381
KV		 1150void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1151{
1152 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1153 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1154
b5878a2d
JB		 1155 trace_api_beacon_loss(sdata);
1156
1e4dcd01
JO		 1157 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1158 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1159}
1160EXPORT_SYMBOL(ieee80211_beacon_loss);
1161
1e4dcd01
JO		 1162void ieee80211_connection_loss(struct ieee80211_vif *vif)
1163{
1164 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1165 struct ieee80211_hw *hw = &sdata->local->hw;
1166
b5878a2d
JB		 1167 trace_api_connection_loss(sdata);
1168
1e4dcd01
JO		 1169 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1170 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1171}
1172EXPORT_SYMBOL(ieee80211_connection_loss);
1173
1174
77fdaa12
JB		 1175static enum rx_mgmt_action __must_check
1176ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1177 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1178{
46900298 1179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1180 const u8 *bssid = NULL;
f0706e82
JB		 1181 u16 reason_code;
1182
f4ea83dd 1183 if (len < 24 + 2)
77fdaa12 1184 return RX_MGMT_NONE;
f0706e82 1185
77fdaa12
JB		 1186 ASSERT_MGD_MTX(ifmgd);
1187
0c1ad2ca 1188 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1189
1190 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1191
77fdaa12 1192 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1193 sdata->name, bssid, reason_code);
77fdaa12 1194
e69e95db 1195 ieee80211_set_disassoc(sdata, true);
7da7cc1d 1196 mutex_lock(&sdata->local->mtx);
63f170e0 1197 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1198 mutex_unlock(&sdata->local->mtx);
f0706e82 1199
77fdaa12 1200 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1201}
1202
1203
77fdaa12
JB		 1204static enum rx_mgmt_action __must_check
1205ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1206 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1207{
46900298 1208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1209 u16 reason_code;
1210
f4ea83dd 1211 if (len < 24 + 2)
77fdaa12 1212 return RX_MGMT_NONE;
f0706e82 1213
77fdaa12
JB		 1214 ASSERT_MGD_MTX(ifmgd);
1215
1216 if (WARN_ON(!ifmgd->associated))
1217 return RX_MGMT_NONE;
1218
0c1ad2ca 1219 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1220 return RX_MGMT_NONE;
f0706e82
JB		 1221
1222 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1223
0ff71613 1224 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1225 sdata->name, mgmt->sa, reason_code);
f0706e82 1226
e69e95db 1227 ieee80211_set_disassoc(sdata, true);
7da7cc1d 1228 mutex_lock(&sdata->local->mtx);
bc83b681 1229 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1230 mutex_unlock(&sdata->local->mtx);
77fdaa12 1231 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1232}
1233
1234
af6b6374
JB		 1235static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1236 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1237{
af6b6374 1238 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1240 struct ieee80211_local *local = sdata->local;
8318d78a 1241 struct ieee80211_supported_band *sband;
f0706e82 1242 struct sta_info *sta;
0c1ad2ca 1243 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1244 u8 *pos;
881d948c 1245 u32 rates, basic_rates;
af6b6374 1246 u16 capab_info, aid;
f0706e82 1247 struct ieee802_11_elems elems;
bda3933a 1248 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1249 u32 changed = 0;
5d1ec85f
JB		 1250 int i, j, err;
1251 bool have_higher_than_11mbit = false;
ae5eb026 1252 u16 ap_ht_cap_flags;
f0706e82 1253
af6b6374 1254 /* AssocResp and ReassocResp have identical structure */
f0706e82 1255
f0706e82 1256 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1257 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1258
1dd84aa2
JB		 1259 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1260 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1261 "set\n", sdata->name, aid);
1dd84aa2
JB		 1262 aid &= ~(BIT(15) | BIT(14));
1263
af6b6374
JB		 1264 pos = mgmt->u.assoc_resp.variable;
1265 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1266
f0706e82
JB		 1267 if (!elems.supp_rates) {
1268 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1269 sdata->name);
af6b6374 1270 return false;
f0706e82
JB		 1271 }
1272
46900298 1273 ifmgd->aid = aid;
f0706e82 1274
0c1ad2ca 1275 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1276 if (!sta) {
5d1ec85f
JB		 1277 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1278 " the AP\n", sdata->name);
af6b6374 1279 return false;
77fdaa12 1280 }
05e5e883 1281
5d1ec85f
JB		 1282 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1283 WLAN_STA_ASSOC_AP);
1284 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1285 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1286
60f8b39c
JB		 1287 rates = 0;
1288 basic_rates = 0;
1289 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1290
60f8b39c
JB		 1291 for (i = 0; i < elems.supp_rates_len; i++) {
1292 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1293 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1294
60f8b39c
JB		 1295 if (rate > 110)
1296 have_higher_than_11mbit = true;
1297
1298 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1299 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1300 rates |= BIT(j);
d61272cb
TW		 1301 if (is_basic)
1302 basic_rates |= BIT(j);
1303 break;
1304 }
f709fc69 1305 }
f709fc69
LCC		 1306 }
1307
60f8b39c
JB		 1308 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1309 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1310 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1311
60f8b39c
JB		 1312 if (rate > 110)
1313 have_higher_than_11mbit = true;
f0706e82 1314
60f8b39c 1315 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1316 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1317 rates |= BIT(j);
d61272cb
TW		 1318 if (is_basic)
1319 basic_rates |= BIT(j);
1320 break;
1321 }
60f8b39c 1322 }
1ebebea8 1323 }
f0706e82 1324
323ce79a 1325 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1326 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1327
1328 /* cf. IEEE 802.11 9.2.12 */
1329 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1330 have_higher_than_11mbit)
1331 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1332 else
1333 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1334
ab1faead 1335 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1336 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1337 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1338
1339 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1340
4b7679a5 1341 rate_control_rate_init(sta);
f0706e82 1342
46900298 1343 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1344 set_sta_flags(sta, WLAN_STA_MFP);
1345
ddf4ac53 1346 if (elems.wmm_param)
60f8b39c 1347 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1348
5d1ec85f
JB		 1349 err = sta_info_insert(sta);
1350 sta = NULL;
1351 if (err) {
1352 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1353 " the AP (error %d)\n", sdata->name, err);
90be561b 1354 return false;
ddf4ac53
JB		 1355 }
1356
ddf4ac53 1357 if (elems.wmm_param)
4ced3f74 1358 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1359 elems.wmm_param_len);
aa837e1d
JB		 1360 else
1361 ieee80211_set_wmm_default(sdata);
f0706e82 1362
e4da8c37
JB		 1363 local->oper_channel = wk->chan;
1364
ae5eb026 1365 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1366 (sdata->local->hw.queues >= 4) &&
ab1faead 1367 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1368 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1369 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1370
60f8b39c
JB		 1371 /* set AID and assoc capability,
1372 * ieee80211_set_associated() will tell the driver */
1373 bss_conf->aid = aid;
1374 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1375 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1376
d524215f
FF		 1377 /*
1378 * If we're using 4-addr mode, let the AP know that we're
1379 * doing so, so that it can create the STA VLAN on its side
1380 */
1381 if (ifmgd->use_4addr)
1382 ieee80211_send_4addr_nullfunc(local, sdata);
1383
15b7b062 1384 /*
b291ba11
JB		 1385 * Start timer to probe the connection to the AP now.
1386 * Also start the timer that will detect beacon loss.
15b7b062 1387 */
b291ba11
JB		 1388 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1389 mod_beacon_timer(sdata);
15b7b062 1390
af6b6374 1391 return true;
f0706e82
JB		 1392}
1393
1394
98c8fccf
JB		 1395static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1396 struct ieee80211_mgmt *mgmt,
1397 size_t len,
1398 struct ieee80211_rx_status *rx_status,
1399 struct ieee802_11_elems *elems,
1400 bool beacon)
1401{
1402 struct ieee80211_local *local = sdata->local;
1403 int freq;
c2b13452 1404 struct ieee80211_bss *bss;
98c8fccf 1405 struct ieee80211_channel *channel;
56007a02
JB		 1406 bool need_ps = false;
1407
1408 if (sdata->u.mgd.associated) {
1409 bss = (void *)sdata->u.mgd.associated->priv;
1410 /* not previously set so we may need to recalc */
1411 need_ps = !bss->dtim_period;
1412 }
98c8fccf
JB		 1413
1414 if (elems->ds_params && elems->ds_params_len == 1)
1415 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1416 else
1417 freq = rx_status->freq;
1418
1419 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1420
1421 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1422 return;
1423
98c8fccf 1424 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1425 channel, beacon);
77fdaa12
JB		 1426 if (bss)
1427 ieee80211_rx_bss_put(local, bss);
1428
1429 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1430 return;
1431
56007a02
JB		 1432 if (need_ps) {
1433 mutex_lock(&local->iflist_mtx);
1434 ieee80211_recalc_ps(local, -1);
1435 mutex_unlock(&local->iflist_mtx);
1436 }
1437
c481ec97 1438 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1439 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1440 ETH_ALEN) == 0)) {
c481ec97
S		 1441 struct ieee80211_channel_sw_ie *sw_elem =
1442 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1443 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1444 bss, rx_status->mactime);
c481ec97 1445 }
f0706e82
JB		 1446}
1447
1448
f698d856 1449static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1450 struct sk_buff *skb)
f0706e82 1451{
af6b6374 1452 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1453 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1454 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1455 size_t baselen, len = skb->len;
ae6a44e3
EK		 1456 struct ieee802_11_elems elems;
1457
15b7b062
KV		 1458 ifmgd = &sdata->u.mgd;
1459
77fdaa12
JB		 1460 ASSERT_MGD_MTX(ifmgd);
1461
47846c9b 1462 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1463 return; /* ignore ProbeResp to foreign address */
1464
ae6a44e3
EK		 1465 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1466 if (baselen > len)
1467 return;
1468
1469 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1470 &elems);
1471
98c8fccf 1472 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1473
77fdaa12 1474 if (ifmgd->associated &&
0c1ad2ca 1475 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1476 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1477 IEEE80211_STA_CONNECTION_POLL)) {
1478 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1479 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1480 mutex_lock(&sdata->local->iflist_mtx);
1481 ieee80211_recalc_ps(sdata->local, -1);
1482 mutex_unlock(&sdata->local->iflist_mtx);
7bdfcaaf
JO		 1483
1484 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1485 return;
1486
b291ba11
JB		 1487 /*
1488 * We've received a probe response, but are not sure whether
1489 * we have or will be receiving any beacons or data, so let's
1490 * schedule the timers again, just in case.
1491 */
1492 mod_beacon_timer(sdata);
7bdfcaaf 1493
b291ba11
JB		 1494 mod_timer(&ifmgd->conn_mon_timer,
1495 round_jiffies_up(jiffies +
1496 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1497 }
f0706e82
JB		 1498}
1499
d91f36db
JB		 1500/*
1501 * This is the canonical list of information elements we care about,
1502 * the filter code also gives us all changes to the Microsoft OUI
1503 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1504 *
1505 * We implement beacon filtering in software since that means we can
1506 * avoid processing the frame here and in cfg80211, and userspace
1507 * will not be able to tell whether the hardware supports it or not.
1508 *
1509 * XXX: This list needs to be dynamic -- userspace needs to be able to
1510 * add items it requires. It also needs to be able to tell us to
1511 * look out for other vendor IEs.
1512 */
1513static const u64 care_about_ies =
1d4df3a5
JB		 1514 (1ULL << WLAN_EID_COUNTRY) |
1515 (1ULL << WLAN_EID_ERP_INFO) |
1516 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1517 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1518 (1ULL << WLAN_EID_HT_CAPABILITY) |
1519 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1520
f698d856 1521static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1522 struct ieee80211_mgmt *mgmt,
1523 size_t len,
1524 struct ieee80211_rx_status *rx_status)
1525{
d91f36db 1526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1528 size_t baselen;
1529 struct ieee802_11_elems elems;
f698d856 1530 struct ieee80211_local *local = sdata->local;
471b3efd 1531 u32 changed = 0;
d91f36db 1532 bool erp_valid, directed_tim = false;
7a5158ef 1533 u8 erp_value = 0;
d91f36db 1534 u32 ncrc;
77fdaa12
JB		 1535 u8 *bssid;
1536
1537 ASSERT_MGD_MTX(ifmgd);
f0706e82 1538
ae6a44e3
EK		 1539 /* Process beacon from the current BSS */
1540 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1541 if (baselen > len)
1542 return;
1543
d91f36db 1544 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1545 return;
f0706e82 1546
b291ba11
JB		 1547 /*
1548 * We might have received a number of frames, among them a
1549 * disassoc frame and a beacon...
1550 */
1551 if (!ifmgd->associated)
77fdaa12
JB		 1552 return;
1553
0c1ad2ca 1554 bssid = ifmgd->associated->bssid;
77fdaa12 1555
b291ba11
JB		 1556 /*
1557 * And in theory even frames from a different AP we were just
1558 * associated to a split-second ago!
1559 */
1560 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1561 return;
1562
17e4ec14
JM		 1563 /* Track average RSSI from the Beacon frames of the current AP */
1564 ifmgd->last_beacon_signal = rx_status->signal;
1565 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1566 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1567 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1568 ifmgd->last_cqm_event_signal = 0;
391a200a 1569 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1570 } else {
1571 ifmgd->ave_beacon_signal =
1572 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1573 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1574 ifmgd->ave_beacon_signal) / 16;
391a200a 1575 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1576 }
1577 if (bss_conf->cqm_rssi_thold &&
391a200a 1578 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1579 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1580 int sig = ifmgd->ave_beacon_signal / 16;
1581 int last_event = ifmgd->last_cqm_event_signal;
1582 int thold = bss_conf->cqm_rssi_thold;
1583 int hyst = bss_conf->cqm_rssi_hyst;
1584 if (sig < thold &&
1585 (last_event == 0 || sig < last_event - hyst)) {
1586 ifmgd->last_cqm_event_signal = sig;
1587 ieee80211_cqm_rssi_notify(
1588 &sdata->vif,
1589 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1590 GFP_KERNEL);
1591 } else if (sig > thold &&
1592 (last_event == 0 || sig > last_event + hyst)) {
1593 ifmgd->last_cqm_event_signal = sig;
1594 ieee80211_cqm_rssi_notify(
1595 &sdata->vif,
1596 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1597 GFP_KERNEL);
1598 }
1599 }
1600
b291ba11 1601 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1602#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1603 if (net_ratelimit()) {
1604 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1605 "to a received beacon\n", sdata->name);
92778180
JM		 1606 }
1607#endif
b291ba11 1608 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1609 mutex_lock(&local->iflist_mtx);
1610 ieee80211_recalc_ps(local, -1);
1611 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1612 }
1613
b291ba11
JB		 1614 /*
1615 * Push the beacon loss detection into the future since
1616 * we are processing a beacon from the AP just now.
1617 */
1618 mod_beacon_timer(sdata);
1619
d91f36db
JB		 1620 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1621 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1622 len - baselen, &elems,
1623 care_about_ies, ncrc);
1624
1625 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1626 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1627 ifmgd->aid);
d91f36db 1628
30196673
JM		 1629 if (ncrc != ifmgd->beacon_crc) {
1630 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1631 true);
d91f36db 1632
4ced3f74 1633 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1634 elems.wmm_param_len);
1635 }
fe3fa827 1636
25c9c875 1637 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1638 if (directed_tim) {
572e0012
KV		 1639 if (local->hw.conf.dynamic_ps_timeout > 0) {
1640 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1641 ieee80211_hw_config(local,
1642 IEEE80211_CONF_CHANGE_PS);
1643 ieee80211_send_nullfunc(local, sdata, 0);
1644 } else {
1645 local->pspolling = true;
1646
1647 /*
1648 * Here is assumed that the driver will be
1649 * able to send ps-poll frame and receive a
1650 * response even though power save mode is
1651 * enabled, but some drivers might require
1652 * to disable power save here. This needs
1653 * to be investigated.
1654 */
1655 ieee80211_send_pspoll(local, sdata);
1656 }
a97b77b9
VN		 1657 }
1658 }
7a5158ef 1659
30196673
JM		 1660 if (ncrc == ifmgd->beacon_crc)
1661 return;
1662 ifmgd->beacon_crc = ncrc;
1663
7a5158ef
JB		 1664 if (elems.erp_info && elems.erp_info_len >= 1) {
1665 erp_valid = true;
1666 erp_value = elems.erp_info[0];
1667 } else {
1668 erp_valid = false;
50c4afb9 1669 }
7a5158ef
JB		 1670 changed |= ieee80211_handle_bss_capability(sdata,
1671 le16_to_cpu(mgmt->u.beacon.capab_info),
1672 erp_valid, erp_value);
f0706e82 1673
d3c990fb 1674
53d6f81c 1675 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1676 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1677 struct sta_info *sta;
1678 struct ieee80211_supported_band *sband;
1679 u16 ap_ht_cap_flags;
1680
1681 rcu_read_lock();
1682
abe60632 1683 sta = sta_info_get(sdata, bssid);
77fdaa12 1684 if (WARN_ON(!sta)) {
ae5eb026
JB		 1685 rcu_read_unlock();
1686 return;
1687 }
1688
1689 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1690
1691 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1692 elems.ht_cap_elem, &sta->sta.ht_cap);
1693
1694 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1695
1696 rcu_read_unlock();
1697
1698 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1699 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1700 }
1701
8b19e6ca 1702 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1703 if (elems.country_elem) {
a8302de9
VT		 1704 /* TODO: IBSS also needs this */
1705 if (elems.pwr_constr_elem)
1706 ieee80211_handle_pwr_constr(sdata,
1707 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1708 elems.pwr_constr_elem,
1709 elems.pwr_constr_elem_len);
3f2355cb
LR		 1710 }
1711
471b3efd 1712 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1713}
1714
1fa57d01
JB		 1715void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1716 struct sk_buff *skb)
f0706e82 1717{
77fdaa12 1718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1719 struct ieee80211_rx_status *rx_status;
f0706e82 1720 struct ieee80211_mgmt *mgmt;
77fdaa12 1721 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1722 u16 fc;
1723
f0706e82
JB		 1724 rx_status = (struct ieee80211_rx_status *) skb->cb;
1725 mgmt = (struct ieee80211_mgmt *) skb->data;
1726 fc = le16_to_cpu(mgmt->frame_control);
1727
77fdaa12
JB		 1728 mutex_lock(&ifmgd->mtx);
1729
1730 if (ifmgd->associated &&
0c1ad2ca 1731 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1732 switch (fc & IEEE80211_FCTL_STYPE) {
1733 case IEEE80211_STYPE_BEACON:
1734 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1735 rx_status);
1736 break;
1737 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1738 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1739 break;
1740 case IEEE80211_STYPE_DEAUTH:
63f170e0 1741 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1742 break;
1743 case IEEE80211_STYPE_DISASSOC:
1744 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1745 break;
1746 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1747 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1748 case WLAN_CATEGORY_SPECTRUM_MGMT:
1749 ieee80211_sta_process_chanswitch(sdata,
1750 &mgmt->u.action.u.chan_switch.sw_elem,
1751 (void *)ifmgd->associated->priv,
1752 rx_status->mactime);
1753 break;
1754 }
77fdaa12
JB		 1755 }
1756 mutex_unlock(&ifmgd->mtx);
1757
1758 switch (rma) {
1759 case RX_MGMT_NONE:
1760 /* no action */
1761 break;
1762 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1763 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1764 break;
1765 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1766 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1767 break;
1768 default:
1769 WARN(1, "unexpected: %d", rma);
1770 }
36b3a628 1771 return;
77fdaa12
JB		 1772 }
1773
77fdaa12
JB		 1774 mutex_unlock(&ifmgd->mtx);
1775
63f170e0 1776 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1777 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1778 struct ieee80211_local *local = sdata->local;
1779 struct ieee80211_work *wk;
1780
a1699b75 1781 mutex_lock(&local->mtx);
b054b747
JB		 1782 list_for_each_entry(wk, &local->work_list, list) {
1783 if (wk->sdata != sdata)
1784 continue;
1785
e5b900d2
JB		 1786 if (wk->type != IEEE80211_WORK_ASSOC &&
1787 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1788 continue;
1789
1790 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1791 continue;
1792 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1793 continue;
1794
1795 /*
1796 * Printing the message only here means we can't
1797 * spuriously print it, but it also means that it
1798 * won't be printed when the frame comes in before
1799 * we even tried to associate or in similar cases.
1800 *
1801 * Ultimately, I suspect cfg80211 should print the
1802 * messages instead.
1803 */
1804 printk(KERN_DEBUG
1805 "%s: deauthenticated from %pM (Reason: %u)\n",
1806 sdata->name, mgmt->bssid,
1807 le16_to_cpu(mgmt->u.deauth.reason_code));
1808
1809 list_del_rcu(&wk->list);
1810 free_work(wk);
1811 break;
1812 }
a1699b75 1813 mutex_unlock(&local->mtx);
f0706e82 1814
ce470613 1815 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1816 }
f0706e82
JB		 1817}
1818
9c6bd790 1819static void ieee80211_sta_timer(unsigned long data)
f0706e82 1820{
60f8b39c
JB		 1821 struct ieee80211_sub_if_data *sdata =
1822 (struct ieee80211_sub_if_data *) data;
46900298 1823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1824 struct ieee80211_local *local = sdata->local;
f0706e82 1825
5bb644a0
JB		 1826 if (local->quiescing) {
1827 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1828 return;
1829 }
1830
64592c8f 1831 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1832}
1833
1fa57d01 1834void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1835{
9c6bd790 1836 struct ieee80211_local *local = sdata->local;
1fa57d01 1837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1838
77fdaa12
JB		 1839 /* then process the rest of the work */
1840 mutex_lock(&ifmgd->mtx);
1841
b291ba11
JB		 1842 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1843 IEEE80211_STA_CONNECTION_POLL) &&
1844 ifmgd->associated) {
a43abf29
ML		 1845 u8 bssid[ETH_ALEN];
1846
0c1ad2ca 1847 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11
JB		 1848 if (time_is_after_jiffies(ifmgd->probe_timeout))
1849 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 1850
1851 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1852#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1853 printk(KERN_DEBUG "No probe response from AP %pM"
1854 " after %dms, try %d\n", bssid,
1855 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1856 ifmgd->probe_send_count);
1857#endif
1858 ieee80211_mgd_probe_ap_send(sdata);
1859 } else {
b291ba11
JB		 1860 /*
1861 * We actually lost the connection ... or did we?
1862 * Let's make sure!
1863 */
1864 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1865 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 1866 printk(KERN_DEBUG "No probe response from AP %pM"
1867 " after %dms, disconnecting.\n",
1868 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e69e95db 1869 ieee80211_set_disassoc(sdata, true);
b291ba11 1870 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1871 mutex_lock(&local->mtx);
1872 ieee80211_recalc_idle(local);
1873 mutex_unlock(&local->mtx);
b291ba11
JB		 1874 /*
1875 * must be outside lock due to cfg80211,
1876 * but that's not a problem.
1877 */
1878 ieee80211_send_deauth_disassoc(sdata, bssid,
1879 IEEE80211_STYPE_DEAUTH,
1880 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1881 NULL, true);
b291ba11
JB		 1882 mutex_lock(&ifmgd->mtx);
1883 }
1884 }
1885
77fdaa12 1886 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 1887}
1888
b291ba11
JB		 1889static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1890{
1891 struct ieee80211_sub_if_data *sdata =
1892 (struct ieee80211_sub_if_data *) data;
1893 struct ieee80211_local *local = sdata->local;
1894
1895 if (local->quiescing)
1896 return;
1897
1e4dcd01
JO		 1898 ieee80211_queue_work(&sdata->local->hw,
1899 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 1900}
1901
1902static void ieee80211_sta_conn_mon_timer(unsigned long data)
1903{
1904 struct ieee80211_sub_if_data *sdata =
1905 (struct ieee80211_sub_if_data *) data;
1906 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1907 struct ieee80211_local *local = sdata->local;
1908
1909 if (local->quiescing)
1910 return;
1911
42935eca 1912 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 1913}
1914
1915static void ieee80211_sta_monitor_work(struct work_struct *work)
1916{
1917 struct ieee80211_sub_if_data *sdata =
1918 container_of(work, struct ieee80211_sub_if_data,
1919 u.mgd.monitor_work);
1920
1921 ieee80211_mgd_probe_ap(sdata, false);
1922}
1923
9c6bd790
JB		 1924static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1925{
ad935687 1926 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 1927 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1928 IEEE80211_STA_CONNECTION_POLL);
ad935687 1929
b291ba11 1930 /* let's probe the connection once */
42935eca 1931 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 1932 &sdata->u.mgd.monitor_work);
1933 /* and do all the other regular work too */
64592c8f 1934 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 1935 }
9c6bd790 1936}
f0706e82 1937
5bb644a0
JB		 1938#ifdef CONFIG_PM
1939void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1940{
1941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1942
1943 /*
1944 * we need to use atomic bitops for the running bits
1945 * only because both timers might fire at the same
1946 * time -- the code here is properly synchronised.
1947 */
1948
d1f5b7a3
JB		 1949 cancel_work_sync(&ifmgd->request_smps_work);
1950
1e4dcd01 1951 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 1952 if (del_timer_sync(&ifmgd->timer))
1953 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1954
1955 cancel_work_sync(&ifmgd->chswitch_work);
1956 if (del_timer_sync(&ifmgd->chswitch_timer))
1957 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 1958
1959 cancel_work_sync(&ifmgd->monitor_work);
1960 /* these will just be re-established on connection */
1961 del_timer_sync(&ifmgd->conn_mon_timer);
1962 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 1963}
1964
1965void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1966{
1967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1968
1969 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1970 add_timer(&ifmgd->timer);
1971 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1972 add_timer(&ifmgd->chswitch_timer);
1973}
1974#endif
1975
9c6bd790
JB		 1976/* interface setup */
1977void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1978{
46900298 1979 struct ieee80211_if_managed *ifmgd;
988c0f72 1980
46900298 1981 ifmgd = &sdata->u.mgd;
b291ba11 1982 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 1983 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 1984 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1985 ieee80211_beacon_connection_loss_work);
d1f5b7a3 1986 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 1987 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 1988 (unsigned long) sdata);
b291ba11
JB		 1989 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1990 (unsigned long) sdata);
1991 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1992 (unsigned long) sdata);
46900298 1993 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 1994 (unsigned long) sdata);
9c6bd790 1995
ab1faead 1996 ifmgd->flags = 0;
bbbdff9e 1997
77fdaa12 1998 mutex_init(&ifmgd->mtx);
0f78231b
JB		 1999
2000 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2001 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2002 else
2003 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2004}
2005
77fdaa12
JB		 2006/* scan finished notification */
2007void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2008{
77fdaa12 2009 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2010
77fdaa12
JB		 2011 /* Restart STA timers */
2012 rcu_read_lock();
2013 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2014 ieee80211_restart_sta_timer(sdata);
2015 rcu_read_unlock();
2016}
60f8b39c 2017
77fdaa12
JB		 2018int ieee80211_max_network_latency(struct notifier_block *nb,
2019 unsigned long data, void *dummy)
2020{
2021 s32 latency_usec = (s32) data;
2022 struct ieee80211_local *local =
2023 container_of(nb, struct ieee80211_local,
2024 network_latency_notifier);
1fa6f4af 2025
77fdaa12
JB		 2026 mutex_lock(&local->iflist_mtx);
2027 ieee80211_recalc_ps(local, latency_usec);
2028 mutex_unlock(&local->iflist_mtx);
dfe67012 2029
77fdaa12 2030 return 0;
9c6bd790
JB		 2031}
2032
77fdaa12 2033/* config hooks */
af6b6374
JB		 2034static enum work_done_result
2035ieee80211_probe_auth_done(struct ieee80211_work *wk,
2036 struct sk_buff *skb)
2037{
2038 if (!skb) {
2039 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2040 return WORK_DONE_DESTROY;
2041 }
2042
2043 if (wk->type == IEEE80211_WORK_AUTH) {
2044 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2045 return WORK_DONE_DESTROY;
2046 }
2047
2048 mutex_lock(&wk->sdata->u.mgd.mtx);
2049 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2050 mutex_unlock(&wk->sdata->u.mgd.mtx);
2051
2052 wk->type = IEEE80211_WORK_AUTH;
2053 wk->probe_auth.tries = 0;
2054 return WORK_DONE_REQUEUE;
2055}
2056
77fdaa12
JB		 2057int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2058 struct cfg80211_auth_request *req)
9c6bd790 2059{
77fdaa12 2060 const u8 *ssid;
f679f65d 2061 struct ieee80211_work *wk;
77fdaa12 2062 u16 auth_alg;
9c6bd790 2063
d5cdfacb
JM		 2064 if (req->local_state_change)
2065 return 0; /* no need to update mac80211 state */
2066
77fdaa12
JB		 2067 switch (req->auth_type) {
2068 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2069 auth_alg = WLAN_AUTH_OPEN;
2070 break;
2071 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2072 if (IS_ERR(sdata->local->wep_tx_tfm))
2073 return -EOPNOTSUPP;
77fdaa12
JB		 2074 auth_alg = WLAN_AUTH_SHARED_KEY;
2075 break;
2076 case NL80211_AUTHTYPE_FT:
2077 auth_alg = WLAN_AUTH_FT;
2078 break;
2079 case NL80211_AUTHTYPE_NETWORK_EAP:
2080 auth_alg = WLAN_AUTH_LEAP;
2081 break;
2082 default:
2083 return -EOPNOTSUPP;
60f8b39c 2084 }
77fdaa12
JB		 2085
2086 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2087 if (!wk)
9c6bd790 2088 return -ENOMEM;
77fdaa12 2089
5e124bd5 2090 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2091
2092 if (req->ie && req->ie_len) {
2093 memcpy(wk->ie, req->ie, req->ie_len);
2094 wk->ie_len = req->ie_len;
9c6bd790 2095 }
77fdaa12 2096
fffd0934 2097 if (req->key && req->key_len) {
af6b6374
JB		 2098 wk->probe_auth.key_len = req->key_len;
2099 wk->probe_auth.key_idx = req->key_idx;
2100 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2101 }
2102
77fdaa12 2103 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2104 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2105 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2106
af6b6374
JB		 2107 wk->probe_auth.algorithm = auth_alg;
2108 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2109
070bb547
JB		 2110 /* if we already have a probe, don't probe again */
2111 if (req->bss->proberesp_ies)
2112 wk->type = IEEE80211_WORK_AUTH;
2113 else
2114 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2115 wk->chan = req->bss->channel;
af6b6374
JB		 2116 wk->sdata = sdata;
2117 wk->done = ieee80211_probe_auth_done;
77fdaa12 2118
af6b6374 2119 ieee80211_add_work(wk);
9c6bd790 2120 return 0;
60f8b39c
JB		 2121}
2122
af6b6374
JB		 2123static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2124 struct sk_buff *skb)
2125{
2126 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2127 struct ieee80211_rx_status *rx_status;
2128 struct ieee802_11_elems elems;
af6b6374
JB		 2129 u16 status;
2130
2131 if (!skb) {
2132 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2133 return WORK_DONE_DESTROY;
2134 }
2135
e5b900d2
JB		 2136 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2137 mutex_lock(&wk->sdata->u.mgd.mtx);
2138 rx_status = (void *) skb->cb;
2139 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2140 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2141 &elems, true);
2142 mutex_unlock(&wk->sdata->u.mgd.mtx);
2143
2144 wk->type = IEEE80211_WORK_ASSOC;
2145 /* not really done yet */
2146 return WORK_DONE_REQUEUE;
2147 }
2148
af6b6374
JB		 2149 mgmt = (void *)skb->data;
2150 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2151
2152 if (status == WLAN_STATUS_SUCCESS) {
2153 mutex_lock(&wk->sdata->u.mgd.mtx);
2154 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2155 mutex_unlock(&wk->sdata->u.mgd.mtx);
2156 /* oops -- internal error -- send timeout for now */
2157 cfg80211_send_assoc_timeout(wk->sdata->dev,
2158 wk->filter_ta);
2159 return WORK_DONE_DESTROY;
2160 }
68542962
JO		 2161
2162 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2163 }
2164
2165 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2166 return WORK_DONE_DESTROY;
2167}
2168
77fdaa12
JB		 2169int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2170 struct cfg80211_assoc_request *req)
f0706e82 2171{
77fdaa12 2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2173 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2174 struct ieee80211_work *wk;
63f170e0 2175 const u8 *ssid;
af6b6374 2176 int i;
f0706e82 2177
77fdaa12 2178 mutex_lock(&ifmgd->mtx);
af6b6374 2179 if (ifmgd->associated) {
9c87ba67
JM		 2180 if (!req->prev_bssid ||
2181 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2182 ETH_ALEN)) {
2183 /*
2184 * We are already associated and the request was not a
2185 * reassociation request from the current BSS, so
2186 * reject it.
2187 */
2188 mutex_unlock(&ifmgd->mtx);
2189 return -EALREADY;
2190 }
2191
2192 /* Trying to reassociate - clear previous association state */
e69e95db 2193 ieee80211_set_disassoc(sdata, true);
af6b6374
JB		 2194 }
2195 mutex_unlock(&ifmgd->mtx);
77fdaa12 2196
63f170e0 2197 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2198 if (!wk)
2199 return -ENOMEM;
77fdaa12 2200
77fdaa12 2201 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2202 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12
JB		 2203
2204 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2205 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2206 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2207 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2208 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2209
77fdaa12
JB		 2210
2211 if (req->ie && req->ie_len) {
2212 memcpy(wk->ie, req->ie, req->ie_len);
2213 wk->ie_len = req->ie_len;
2214 } else
2215 wk->ie_len = 0;
2216
0c1ad2ca 2217 wk->assoc.bss = req->bss;
f679f65d 2218
af6b6374 2219 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2220
af6b6374
JB		 2221 /* new association always uses requested smps mode */
2222 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2223 if (ifmgd->powersave)
2224 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2225 else
2226 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2227 } else
2228 ifmgd->ap_smps = ifmgd->req_smps;
2229
2230 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2231 /*
2232 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2233 * We still associate in non-HT mode (11a/b/g) if any one of these
2234 * ciphers is configured as pairwise.
2235 * We can set this to true for non-11n hardware, that'll be checked
2236 * separately along with the peer capabilities.
2237 */
af6b6374 2238 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2239 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2240 wk->assoc.wmm_used = bss->wmm_used;
2241 wk->assoc.supp_rates = bss->supp_rates;
2242 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2243 wk->assoc.ht_information_ie =
2244 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2245
ab13315a
KV		 2246 if (bss->wmm_used && bss->uapsd_supported &&
2247 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2248 wk->assoc.uapsd_used = true;
2249 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2250 } else {
2251 wk->assoc.uapsd_used = false;
2252 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2253 }
2254
63f170e0 2255 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2256 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2257 wk->assoc.ssid_len = ssid[1];
63f170e0 2258
77fdaa12 2259 if (req->prev_bssid)
f679f65d 2260 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2261
f679f65d 2262 wk->chan = req->bss->channel;
af6b6374
JB		 2263 wk->sdata = sdata;
2264 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2265 if (!bss->dtim_period &&
2266 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2267 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2268 else
2269 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2270
2271 if (req->use_mfp) {
2272 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2273 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2274 } else {
2275 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2276 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2277 }
2278
2279 if (req->crypto.control_port)
2280 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2281 else
2282 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2283
a621fa4d
JB		 2284 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2285 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2286
af6b6374
JB		 2287 ieee80211_add_work(wk);
2288 return 0;
f0706e82
JB		 2289}
2290
77fdaa12 2291int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2292 struct cfg80211_deauth_request *req,
2293 void *cookie)
f0706e82 2294{
af6b6374 2295 struct ieee80211_local *local = sdata->local;
46900298 2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2297 struct ieee80211_work *wk;
05e48e8e
JM		 2298 u8 bssid[ETH_ALEN];
2299 bool assoc_bss = false;
f0706e82 2300
77fdaa12
JB		 2301 mutex_lock(&ifmgd->mtx);
2302
05e48e8e 2303 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2304 if (ifmgd->associated == req->bss) {
05e48e8e 2305 ieee80211_set_disassoc(sdata, false);
af6b6374 2306 mutex_unlock(&ifmgd->mtx);
05e48e8e 2307 assoc_bss = true;
af6b6374
JB		 2308 } else {
2309 bool not_auth_yet = false;
f0706e82 2310
a58ce43f 2311 mutex_unlock(&ifmgd->mtx);
a58ce43f 2312
a1699b75 2313 mutex_lock(&local->mtx);
af6b6374 2314 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2315 if (wk->sdata != sdata)
af6b6374 2316 continue;
29165e4c
JB		 2317
2318 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2319 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2320 wk->type != IEEE80211_WORK_ASSOC &&
2321 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2322 continue;
2323
af6b6374
JB		 2324 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2325 continue;
29165e4c
JB		 2326
2327 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2328 list_del_rcu(&wk->list);
af6b6374
JB		 2329 free_work(wk);
2330 break;
2331 }
a1699b75 2332 mutex_unlock(&local->mtx);
af6b6374
JB		 2333
2334 /*
2335 * If somebody requests authentication and we haven't
2336 * sent out an auth frame yet there's no need to send
2337 * out a deauth frame either. If the state was PROBE,
2338 * then this is the case. If it's AUTH we have sent a
2339 * frame, and if it's IDLE we have completed the auth
2340 * process already.
2341 */
2342 if (not_auth_yet) {
2343 __cfg80211_auth_canceled(sdata->dev, bssid);
2344 return 0;
2345 }
2346 }
77fdaa12 2347
0ff71613 2348 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2349 sdata->name, bssid, req->reason_code);
0ff71613 2350
d5cdfacb
JM		 2351 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2352 req->reason_code, cookie,
2353 !req->local_state_change);
05e48e8e
JM		 2354 if (assoc_bss)
2355 sta_info_destroy_addr(sdata, bssid);
f0706e82 2356
7da7cc1d 2357 mutex_lock(&sdata->local->mtx);
bc83b681 2358 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2359 mutex_unlock(&sdata->local->mtx);
bc83b681 2360
f0706e82
JB		 2361 return 0;
2362}
84363e6e 2363
77fdaa12 2364int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2365 struct cfg80211_disassoc_request *req,
2366 void *cookie)
9c6bd790 2367{
77fdaa12 2368 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2369 u8 bssid[ETH_ALEN];
9c6bd790 2370
77fdaa12 2371 mutex_lock(&ifmgd->mtx);
10f644a4 2372
8d8b261a
JB		 2373 /*
2374 * cfg80211 should catch this ... but it's racy since
2375 * we can receive a disassoc frame, process it, hand it
2376 * to cfg80211 while that's in a locked section already
2377 * trying to tell us that the user wants to disconnect.
2378 */
0c1ad2ca 2379 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2380 mutex_unlock(&ifmgd->mtx);
2381 return -ENOLINK;
2382 }
2383
0ff71613 2384 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2385 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2386
e69e95db
JM		 2387 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2388 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2389
2390 mutex_unlock(&ifmgd->mtx);
10f644a4 2391
77fdaa12 2392 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2393 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2394 cookie, !req->local_state_change);
e69e95db 2395 sta_info_destroy_addr(sdata, bssid);
bc83b681 2396
7da7cc1d 2397 mutex_lock(&sdata->local->mtx);
bc83b681 2398 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2399 mutex_unlock(&sdata->local->mtx);
bc83b681 2400
10f644a4
JB		 2401 return 0;
2402}
026331c4 2403
a97c13c3
JO		 2404void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2405 enum nl80211_cqm_rssi_threshold_event rssi_event,
2406 gfp_t gfp)
2407{
2408 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2409
b5878a2d
JB		 2410 trace_api_cqm_rssi_notify(sdata, rssi_event);
2411
a97c13c3
JO		 2412 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2413}
2414EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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