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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
JM		 923static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
924 bool remove_sta)
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);
1fa6f4af 963 ieee80211_sta_tear_down_BA_sessions(sta);
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
1e4dcd01
JO		 1111static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1112{
1113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1114 struct ieee80211_local *local = sdata->local;
1115 u8 bssid[ETH_ALEN];
1116
1117 mutex_lock(&ifmgd->mtx);
1118 if (!ifmgd->associated) {
1119 mutex_unlock(&ifmgd->mtx);
1120 return;
1121 }
1122
1123 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1124
1125 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1126
e69e95db 1127 ieee80211_set_disassoc(sdata, true);
1e4dcd01 1128 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1129
1130 mutex_lock(&local->mtx);
1131 ieee80211_recalc_idle(local);
1132 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1133 /*
1134 * must be outside lock due to cfg80211,
1135 * but that's not a problem.
1136 */
1137 ieee80211_send_deauth_disassoc(sdata, bssid,
1138 IEEE80211_STYPE_DEAUTH,
1139 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1140 NULL, true);
1e4dcd01
JO		 1141}
1142
1143void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1144{
1145 struct ieee80211_sub_if_data *sdata =
1146 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1147 u.mgd.beacon_connection_loss_work);
b291ba11 1148
1e4dcd01
JO		 1149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1150 __ieee80211_connection_loss(sdata);
1151 else
1152 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1153}
1154
04de8381
KV		 1155void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1156{
1157 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1158 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1159
b5878a2d
JB		 1160 trace_api_beacon_loss(sdata);
1161
1e4dcd01
JO		 1162 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1163 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1164}
1165EXPORT_SYMBOL(ieee80211_beacon_loss);
1166
1e4dcd01
JO		 1167void ieee80211_connection_loss(struct ieee80211_vif *vif)
1168{
1169 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1170 struct ieee80211_hw *hw = &sdata->local->hw;
1171
b5878a2d
JB		 1172 trace_api_connection_loss(sdata);
1173
1e4dcd01
JO		 1174 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1175 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1176}
1177EXPORT_SYMBOL(ieee80211_connection_loss);
1178
1179
77fdaa12
JB		 1180static enum rx_mgmt_action __must_check
1181ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1182 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1183{
46900298 1184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1185 const u8 *bssid = NULL;
f0706e82
JB		 1186 u16 reason_code;
1187
f4ea83dd 1188 if (len < 24 + 2)
77fdaa12 1189 return RX_MGMT_NONE;
f0706e82 1190
77fdaa12
JB		 1191 ASSERT_MGD_MTX(ifmgd);
1192
0c1ad2ca 1193 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1194
1195 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1196
77fdaa12 1197 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1198 sdata->name, bssid, reason_code);
77fdaa12 1199
e69e95db 1200 ieee80211_set_disassoc(sdata, true);
7da7cc1d 1201 mutex_lock(&sdata->local->mtx);
63f170e0 1202 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1203 mutex_unlock(&sdata->local->mtx);
f0706e82 1204
77fdaa12 1205 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1206}
1207
1208
77fdaa12
JB		 1209static enum rx_mgmt_action __must_check
1210ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1211 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1212{
46900298 1213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1214 u16 reason_code;
1215
f4ea83dd 1216 if (len < 24 + 2)
77fdaa12 1217 return RX_MGMT_NONE;
f0706e82 1218
77fdaa12
JB		 1219 ASSERT_MGD_MTX(ifmgd);
1220
1221 if (WARN_ON(!ifmgd->associated))
1222 return RX_MGMT_NONE;
1223
0c1ad2ca 1224 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1225 return RX_MGMT_NONE;
f0706e82
JB		 1226
1227 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1228
0ff71613 1229 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1230 sdata->name, mgmt->sa, reason_code);
f0706e82 1231
e69e95db 1232 ieee80211_set_disassoc(sdata, true);
7da7cc1d 1233 mutex_lock(&sdata->local->mtx);
bc83b681 1234 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1235 mutex_unlock(&sdata->local->mtx);
77fdaa12 1236 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1237}
1238
1239
af6b6374
JB		 1240static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1241 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1242{
af6b6374 1243 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1245 struct ieee80211_local *local = sdata->local;
8318d78a 1246 struct ieee80211_supported_band *sband;
f0706e82 1247 struct sta_info *sta;
0c1ad2ca 1248 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1249 u8 *pos;
881d948c 1250 u32 rates, basic_rates;
af6b6374 1251 u16 capab_info, aid;
f0706e82 1252 struct ieee802_11_elems elems;
bda3933a 1253 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1254 u32 changed = 0;
5d1ec85f
JB		 1255 int i, j, err;
1256 bool have_higher_than_11mbit = false;
ae5eb026 1257 u16 ap_ht_cap_flags;
f0706e82 1258
af6b6374 1259 /* AssocResp and ReassocResp have identical structure */
f0706e82 1260
f0706e82 1261 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1262 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1263
1dd84aa2
JB		 1264 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1265 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1266 "set\n", sdata->name, aid);
1dd84aa2
JB		 1267 aid &= ~(BIT(15) | BIT(14));
1268
af6b6374
JB		 1269 pos = mgmt->u.assoc_resp.variable;
1270 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1271
f0706e82
JB		 1272 if (!elems.supp_rates) {
1273 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1274 sdata->name);
af6b6374 1275 return false;
f0706e82
JB		 1276 }
1277
46900298 1278 ifmgd->aid = aid;
f0706e82 1279
0c1ad2ca 1280 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1281 if (!sta) {
5d1ec85f
JB		 1282 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1283 " the AP\n", sdata->name);
af6b6374 1284 return false;
77fdaa12 1285 }
05e5e883 1286
5d1ec85f
JB		 1287 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1288 WLAN_STA_ASSOC_AP);
1289 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1290 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1291
60f8b39c
JB		 1292 rates = 0;
1293 basic_rates = 0;
e7480bbb 1294 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1295
60f8b39c
JB		 1296 for (i = 0; i < elems.supp_rates_len; i++) {
1297 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1298 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1299
60f8b39c
JB		 1300 if (rate > 110)
1301 have_higher_than_11mbit = true;
1302
1303 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1304 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1305 rates |= BIT(j);
d61272cb
TW		 1306 if (is_basic)
1307 basic_rates |= BIT(j);
1308 break;
1309 }
f709fc69 1310 }
f709fc69
LCC		 1311 }
1312
60f8b39c
JB		 1313 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1314 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1315 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1316
60f8b39c
JB		 1317 if (rate > 110)
1318 have_higher_than_11mbit = true;
f0706e82 1319
60f8b39c 1320 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1321 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1322 rates |= BIT(j);
d61272cb
TW		 1323 if (is_basic)
1324 basic_rates |= BIT(j);
1325 break;
1326 }
60f8b39c 1327 }
1ebebea8 1328 }
f0706e82 1329
e7480bbb 1330 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1331 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1332
1333 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1334 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1335 have_higher_than_11mbit)
1336 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1337 else
1338 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1339
ab1faead 1340 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1341 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1342 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1343
1344 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1345
4b7679a5 1346 rate_control_rate_init(sta);
f0706e82 1347
46900298 1348 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1349 set_sta_flags(sta, WLAN_STA_MFP);
1350
ddf4ac53 1351 if (elems.wmm_param)
60f8b39c 1352 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1353
5d1ec85f
JB		 1354 err = sta_info_insert(sta);
1355 sta = NULL;
1356 if (err) {
1357 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1358 " the AP (error %d)\n", sdata->name, err);
90be561b 1359 return false;
ddf4ac53
JB		 1360 }
1361
f2176d72
JO		 1362 /*
1363 * Always handle WMM once after association regardless
1364 * of the first value the AP uses. Setting -1 here has
1365 * that effect because the AP values is an unsigned
1366 * 4-bit value.
1367 */
1368 ifmgd->wmm_last_param_set = -1;
1369
ddf4ac53 1370 if (elems.wmm_param)
4ced3f74 1371 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1372 elems.wmm_param_len);
aa837e1d
JB		 1373 else
1374 ieee80211_set_wmm_default(sdata);
f0706e82 1375
e4da8c37
JB		 1376 local->oper_channel = wk->chan;
1377
ae5eb026 1378 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1379 (sdata->local->hw.queues >= 4) &&
ab1faead 1380 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1381 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1382 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1383
60f8b39c
JB		 1384 /* set AID and assoc capability,
1385 * ieee80211_set_associated() will tell the driver */
1386 bss_conf->aid = aid;
1387 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1388 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1389
d524215f
FF		 1390 /*
1391 * If we're using 4-addr mode, let the AP know that we're
1392 * doing so, so that it can create the STA VLAN on its side
1393 */
1394 if (ifmgd->use_4addr)
1395 ieee80211_send_4addr_nullfunc(local, sdata);
1396
15b7b062 1397 /*
b291ba11
JB		 1398 * Start timer to probe the connection to the AP now.
1399 * Also start the timer that will detect beacon loss.
15b7b062 1400 */
b291ba11 1401 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1402 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1403
af6b6374 1404 return true;
f0706e82
JB		 1405}
1406
1407
98c8fccf
JB		 1408static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1409 struct ieee80211_mgmt *mgmt,
1410 size_t len,
1411 struct ieee80211_rx_status *rx_status,
1412 struct ieee802_11_elems *elems,
1413 bool beacon)
1414{
1415 struct ieee80211_local *local = sdata->local;
1416 int freq;
c2b13452 1417 struct ieee80211_bss *bss;
98c8fccf 1418 struct ieee80211_channel *channel;
56007a02
JB		 1419 bool need_ps = false;
1420
1421 if (sdata->u.mgd.associated) {
1422 bss = (void *)sdata->u.mgd.associated->priv;
1423 /* not previously set so we may need to recalc */
1424 need_ps = !bss->dtim_period;
1425 }
98c8fccf
JB		 1426
1427 if (elems->ds_params && elems->ds_params_len == 1)
1428 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1429 else
1430 freq = rx_status->freq;
1431
1432 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1433
1434 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1435 return;
1436
98c8fccf 1437 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1438 channel, beacon);
77fdaa12
JB		 1439 if (bss)
1440 ieee80211_rx_bss_put(local, bss);
1441
1442 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1443 return;
1444
56007a02
JB		 1445 if (need_ps) {
1446 mutex_lock(&local->iflist_mtx);
1447 ieee80211_recalc_ps(local, -1);
1448 mutex_unlock(&local->iflist_mtx);
1449 }
1450
c481ec97 1451 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1452 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1453 ETH_ALEN) == 0)) {
c481ec97
S		 1454 struct ieee80211_channel_sw_ie *sw_elem =
1455 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1456 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1457 bss, rx_status->mactime);
c481ec97 1458 }
f0706e82
JB		 1459}
1460
1461
f698d856 1462static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1463 struct sk_buff *skb)
f0706e82 1464{
af6b6374 1465 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1466 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1467 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1468 size_t baselen, len = skb->len;
ae6a44e3
EK		 1469 struct ieee802_11_elems elems;
1470
15b7b062
KV		 1471 ifmgd = &sdata->u.mgd;
1472
77fdaa12
JB		 1473 ASSERT_MGD_MTX(ifmgd);
1474
47846c9b 1475 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1476 return; /* ignore ProbeResp to foreign address */
1477
ae6a44e3
EK		 1478 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1479 if (baselen > len)
1480 return;
1481
1482 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1483 &elems);
1484
98c8fccf 1485 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1486
77fdaa12 1487 if (ifmgd->associated &&
0c1ad2ca 1488 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1489 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1490 IEEE80211_STA_CONNECTION_POLL)) {
1491 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1492 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1493 mutex_lock(&sdata->local->iflist_mtx);
1494 ieee80211_recalc_ps(sdata->local, -1);
1495 mutex_unlock(&sdata->local->iflist_mtx);
7bdfcaaf
JO		 1496
1497 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1498 return;
1499
b291ba11
JB		 1500 /*
1501 * We've received a probe response, but are not sure whether
1502 * we have or will be receiving any beacons or data, so let's
1503 * schedule the timers again, just in case.
1504 */
d3a910a8 1505 ieee80211_sta_reset_beacon_monitor(sdata);
7bdfcaaf 1506
b291ba11
JB		 1507 mod_timer(&ifmgd->conn_mon_timer,
1508 round_jiffies_up(jiffies +
1509 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1510 }
f0706e82
JB		 1511}
1512
d91f36db
JB		 1513/*
1514 * This is the canonical list of information elements we care about,
1515 * the filter code also gives us all changes to the Microsoft OUI
1516 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1517 *
1518 * We implement beacon filtering in software since that means we can
1519 * avoid processing the frame here and in cfg80211, and userspace
1520 * will not be able to tell whether the hardware supports it or not.
1521 *
1522 * XXX: This list needs to be dynamic -- userspace needs to be able to
1523 * add items it requires. It also needs to be able to tell us to
1524 * look out for other vendor IEs.
1525 */
1526static const u64 care_about_ies =
1d4df3a5
JB		 1527 (1ULL << WLAN_EID_COUNTRY) |
1528 (1ULL << WLAN_EID_ERP_INFO) |
1529 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1530 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1531 (1ULL << WLAN_EID_HT_CAPABILITY) |
1532 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1533
f698d856 1534static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1535 struct ieee80211_mgmt *mgmt,
1536 size_t len,
1537 struct ieee80211_rx_status *rx_status)
1538{
d91f36db 1539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1540 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1541 size_t baselen;
1542 struct ieee802_11_elems elems;
f698d856 1543 struct ieee80211_local *local = sdata->local;
471b3efd 1544 u32 changed = 0;
d91f36db 1545 bool erp_valid, directed_tim = false;
7a5158ef 1546 u8 erp_value = 0;
d91f36db 1547 u32 ncrc;
77fdaa12
JB		 1548 u8 *bssid;
1549
1550 ASSERT_MGD_MTX(ifmgd);
f0706e82 1551
ae6a44e3
EK		 1552 /* Process beacon from the current BSS */
1553 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1554 if (baselen > len)
1555 return;
1556
d91f36db 1557 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1558 return;
f0706e82 1559
b291ba11
JB		 1560 /*
1561 * We might have received a number of frames, among them a
1562 * disassoc frame and a beacon...
1563 */
1564 if (!ifmgd->associated)
77fdaa12
JB		 1565 return;
1566
0c1ad2ca 1567 bssid = ifmgd->associated->bssid;
77fdaa12 1568
b291ba11
JB		 1569 /*
1570 * And in theory even frames from a different AP we were just
1571 * associated to a split-second ago!
1572 */
1573 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1574 return;
1575
17e4ec14
JM		 1576 /* Track average RSSI from the Beacon frames of the current AP */
1577 ifmgd->last_beacon_signal = rx_status->signal;
1578 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1579 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1580 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1581 ifmgd->last_cqm_event_signal = 0;
391a200a 1582 ifmgd->count_beacon_signal = 1;
17e4ec14
JM		 1583 } else {
1584 ifmgd->ave_beacon_signal =
1585 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1586 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1587 ifmgd->ave_beacon_signal) / 16;
391a200a 1588 ifmgd->count_beacon_signal++;
17e4ec14
JM		 1589 }
1590 if (bss_conf->cqm_rssi_thold &&
391a200a 1591 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1592 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1593 int sig = ifmgd->ave_beacon_signal / 16;
1594 int last_event = ifmgd->last_cqm_event_signal;
1595 int thold = bss_conf->cqm_rssi_thold;
1596 int hyst = bss_conf->cqm_rssi_hyst;
1597 if (sig < thold &&
1598 (last_event == 0 || sig < last_event - hyst)) {
1599 ifmgd->last_cqm_event_signal = sig;
1600 ieee80211_cqm_rssi_notify(
1601 &sdata->vif,
1602 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1603 GFP_KERNEL);
1604 } else if (sig > thold &&
1605 (last_event == 0 || sig > last_event + hyst)) {
1606 ifmgd->last_cqm_event_signal = sig;
1607 ieee80211_cqm_rssi_notify(
1608 &sdata->vif,
1609 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1610 GFP_KERNEL);
1611 }
1612 }
1613
b291ba11 1614 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1615#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1616 if (net_ratelimit()) {
1617 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1618 "to a received beacon\n", sdata->name);
92778180
JM		 1619 }
1620#endif
b291ba11 1621 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1622 mutex_lock(&local->iflist_mtx);
1623 ieee80211_recalc_ps(local, -1);
1624 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1625 }
1626
b291ba11
JB		 1627 /*
1628 * Push the beacon loss detection into the future since
1629 * we are processing a beacon from the AP just now.
1630 */
d3a910a8 1631 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1632
d91f36db
JB		 1633 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1634 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1635 len - baselen, &elems,
1636 care_about_ies, ncrc);
1637
1638 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1639 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1640 ifmgd->aid);
d91f36db 1641
d8ec4433 1642 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1643 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1644 true);
d91f36db 1645
4ced3f74 1646 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1647 elems.wmm_param_len);
1648 }
fe3fa827 1649
25c9c875 1650 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1651 if (directed_tim) {
572e0012
KV		 1652 if (local->hw.conf.dynamic_ps_timeout > 0) {
1653 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1654 ieee80211_hw_config(local,
1655 IEEE80211_CONF_CHANGE_PS);
1656 ieee80211_send_nullfunc(local, sdata, 0);
1657 } else {
1658 local->pspolling = true;
1659
1660 /*
1661 * Here is assumed that the driver will be
1662 * able to send ps-poll frame and receive a
1663 * response even though power save mode is
1664 * enabled, but some drivers might require
1665 * to disable power save here. This needs
1666 * to be investigated.
1667 */
1668 ieee80211_send_pspoll(local, sdata);
1669 }
a97b77b9
VN		 1670 }
1671 }
7a5158ef 1672
d8ec4433 1673 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1674 return;
1675 ifmgd->beacon_crc = ncrc;
d8ec4433 1676 ifmgd->beacon_crc_valid = true;
30196673 1677
7a5158ef
JB		 1678 if (elems.erp_info && elems.erp_info_len >= 1) {
1679 erp_valid = true;
1680 erp_value = elems.erp_info[0];
1681 } else {
1682 erp_valid = false;
50c4afb9 1683 }
7a5158ef
JB		 1684 changed |= ieee80211_handle_bss_capability(sdata,
1685 le16_to_cpu(mgmt->u.beacon.capab_info),
1686 erp_valid, erp_value);
f0706e82 1687
d3c990fb 1688
53d6f81c 1689 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1690 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1691 struct sta_info *sta;
1692 struct ieee80211_supported_band *sband;
1693 u16 ap_ht_cap_flags;
1694
1695 rcu_read_lock();
1696
abe60632 1697 sta = sta_info_get(sdata, bssid);
77fdaa12 1698 if (WARN_ON(!sta)) {
ae5eb026
JB		 1699 rcu_read_unlock();
1700 return;
1701 }
1702
1703 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1704
1705 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1706 elems.ht_cap_elem, &sta->sta.ht_cap);
1707
1708 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1709
1710 rcu_read_unlock();
1711
1712 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1713 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1714 }
1715
8b19e6ca 1716 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1717 if (elems.country_elem) {
a8302de9
VT		 1718 /* TODO: IBSS also needs this */
1719 if (elems.pwr_constr_elem)
1720 ieee80211_handle_pwr_constr(sdata,
1721 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1722 elems.pwr_constr_elem,
1723 elems.pwr_constr_elem_len);
3f2355cb
LR		 1724 }
1725
471b3efd 1726 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1727}
1728
1fa57d01
JB		 1729void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1730 struct sk_buff *skb)
f0706e82 1731{
77fdaa12 1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1733 struct ieee80211_rx_status *rx_status;
f0706e82 1734 struct ieee80211_mgmt *mgmt;
77fdaa12 1735 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1736 u16 fc;
1737
f0706e82
JB		 1738 rx_status = (struct ieee80211_rx_status *) skb->cb;
1739 mgmt = (struct ieee80211_mgmt *) skb->data;
1740 fc = le16_to_cpu(mgmt->frame_control);
1741
77fdaa12
JB		 1742 mutex_lock(&ifmgd->mtx);
1743
1744 if (ifmgd->associated &&
0c1ad2ca 1745 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1746 switch (fc & IEEE80211_FCTL_STYPE) {
1747 case IEEE80211_STYPE_BEACON:
1748 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1749 rx_status);
1750 break;
1751 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1752 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1753 break;
1754 case IEEE80211_STYPE_DEAUTH:
63f170e0 1755 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1756 break;
1757 case IEEE80211_STYPE_DISASSOC:
1758 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1759 break;
1760 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1761 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1762 case WLAN_CATEGORY_SPECTRUM_MGMT:
1763 ieee80211_sta_process_chanswitch(sdata,
1764 &mgmt->u.action.u.chan_switch.sw_elem,
1765 (void *)ifmgd->associated->priv,
1766 rx_status->mactime);
1767 break;
1768 }
77fdaa12
JB		 1769 }
1770 mutex_unlock(&ifmgd->mtx);
1771
1772 switch (rma) {
1773 case RX_MGMT_NONE:
1774 /* no action */
1775 break;
1776 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1777 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1778 break;
1779 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1780 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1781 break;
1782 default:
1783 WARN(1, "unexpected: %d", rma);
1784 }
36b3a628 1785 return;
77fdaa12
JB		 1786 }
1787
77fdaa12
JB		 1788 mutex_unlock(&ifmgd->mtx);
1789
63f170e0 1790 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 1791 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1792 struct ieee80211_local *local = sdata->local;
1793 struct ieee80211_work *wk;
1794
a1699b75 1795 mutex_lock(&local->mtx);
b054b747
JB		 1796 list_for_each_entry(wk, &local->work_list, list) {
1797 if (wk->sdata != sdata)
1798 continue;
1799
e5b900d2
JB		 1800 if (wk->type != IEEE80211_WORK_ASSOC &&
1801 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 1802 continue;
1803
1804 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1805 continue;
1806 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1807 continue;
1808
1809 /*
1810 * Printing the message only here means we can't
1811 * spuriously print it, but it also means that it
1812 * won't be printed when the frame comes in before
1813 * we even tried to associate or in similar cases.
1814 *
1815 * Ultimately, I suspect cfg80211 should print the
1816 * messages instead.
1817 */
1818 printk(KERN_DEBUG
1819 "%s: deauthenticated from %pM (Reason: %u)\n",
1820 sdata->name, mgmt->bssid,
1821 le16_to_cpu(mgmt->u.deauth.reason_code));
1822
1823 list_del_rcu(&wk->list);
1824 free_work(wk);
1825 break;
1826 }
a1699b75 1827 mutex_unlock(&local->mtx);
f0706e82 1828
ce470613 1829 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 1830 }
f0706e82
JB		 1831}
1832
9c6bd790 1833static void ieee80211_sta_timer(unsigned long data)
f0706e82 1834{
60f8b39c
JB		 1835 struct ieee80211_sub_if_data *sdata =
1836 (struct ieee80211_sub_if_data *) data;
46900298 1837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1838 struct ieee80211_local *local = sdata->local;
f0706e82 1839
5bb644a0
JB		 1840 if (local->quiescing) {
1841 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1842 return;
1843 }
1844
64592c8f 1845 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 1846}
1847
1fa57d01 1848void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 1849{
9c6bd790 1850 struct ieee80211_local *local = sdata->local;
1fa57d01 1851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1852
77fdaa12
JB		 1853 /* then process the rest of the work */
1854 mutex_lock(&ifmgd->mtx);
1855
b291ba11
JB		 1856 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1857 IEEE80211_STA_CONNECTION_POLL) &&
1858 ifmgd->associated) {
a43abf29
ML		 1859 u8 bssid[ETH_ALEN];
1860
0c1ad2ca 1861 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11
JB		 1862 if (time_is_after_jiffies(ifmgd->probe_timeout))
1863 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 1864
1865 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1866#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1867 printk(KERN_DEBUG "No probe response from AP %pM"
1868 " after %dms, try %d\n", bssid,
1869 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1870 ifmgd->probe_send_count);
1871#endif
1872 ieee80211_mgd_probe_ap_send(sdata);
1873 } else {
b291ba11
JB		 1874 /*
1875 * We actually lost the connection ... or did we?
1876 * Let's make sure!
1877 */
1878 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1879 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 1880 printk(KERN_DEBUG "No probe response from AP %pM"
1881 " after %dms, disconnecting.\n",
1882 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e69e95db 1883 ieee80211_set_disassoc(sdata, true);
b291ba11 1884 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1885 mutex_lock(&local->mtx);
1886 ieee80211_recalc_idle(local);
1887 mutex_unlock(&local->mtx);
b291ba11
JB		 1888 /*
1889 * must be outside lock due to cfg80211,
1890 * but that's not a problem.
1891 */
1892 ieee80211_send_deauth_disassoc(sdata, bssid,
1893 IEEE80211_STYPE_DEAUTH,
1894 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1895 NULL, true);
b291ba11
JB		 1896 mutex_lock(&ifmgd->mtx);
1897 }
1898 }
1899
77fdaa12 1900 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 1901}
1902
b291ba11
JB		 1903static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1904{
1905 struct ieee80211_sub_if_data *sdata =
1906 (struct ieee80211_sub_if_data *) data;
1907 struct ieee80211_local *local = sdata->local;
1908
1909 if (local->quiescing)
1910 return;
1911
1e4dcd01
JO		 1912 ieee80211_queue_work(&sdata->local->hw,
1913 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 1914}
1915
1916static void ieee80211_sta_conn_mon_timer(unsigned long data)
1917{
1918 struct ieee80211_sub_if_data *sdata =
1919 (struct ieee80211_sub_if_data *) data;
1920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1921 struct ieee80211_local *local = sdata->local;
1922
1923 if (local->quiescing)
1924 return;
1925
42935eca 1926 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 1927}
1928
1929static void ieee80211_sta_monitor_work(struct work_struct *work)
1930{
1931 struct ieee80211_sub_if_data *sdata =
1932 container_of(work, struct ieee80211_sub_if_data,
1933 u.mgd.monitor_work);
1934
1935 ieee80211_mgd_probe_ap(sdata, false);
1936}
1937
9c6bd790
JB		 1938static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1939{
ad935687 1940 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 1941 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1942 IEEE80211_STA_CONNECTION_POLL);
ad935687 1943
b291ba11 1944 /* let's probe the connection once */
42935eca 1945 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 1946 &sdata->u.mgd.monitor_work);
1947 /* and do all the other regular work too */
64592c8f 1948 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 1949 }
9c6bd790 1950}
f0706e82 1951
5bb644a0
JB		 1952#ifdef CONFIG_PM
1953void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1954{
1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1956
1957 /*
1958 * we need to use atomic bitops for the running bits
1959 * only because both timers might fire at the same
1960 * time -- the code here is properly synchronised.
1961 */
1962
d1f5b7a3
JB		 1963 cancel_work_sync(&ifmgd->request_smps_work);
1964
1e4dcd01 1965 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 1966 if (del_timer_sync(&ifmgd->timer))
1967 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1968
1969 cancel_work_sync(&ifmgd->chswitch_work);
1970 if (del_timer_sync(&ifmgd->chswitch_timer))
1971 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 1972
1973 cancel_work_sync(&ifmgd->monitor_work);
1974 /* these will just be re-established on connection */
1975 del_timer_sync(&ifmgd->conn_mon_timer);
1976 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 1977}
1978
1979void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1980{
1981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1982
1983 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1984 add_timer(&ifmgd->timer);
1985 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1986 add_timer(&ifmgd->chswitch_timer);
1987}
1988#endif
1989
9c6bd790
JB		 1990/* interface setup */
1991void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1992{
46900298 1993 struct ieee80211_if_managed *ifmgd;
988c0f72 1994
46900298 1995 ifmgd = &sdata->u.mgd;
b291ba11 1996 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 1997 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 1998 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1999 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2000 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2001 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2002 (unsigned long) sdata);
b291ba11
JB		 2003 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2004 (unsigned long) sdata);
2005 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2006 (unsigned long) sdata);
46900298 2007 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2008 (unsigned long) sdata);
9c6bd790 2009
ab1faead 2010 ifmgd->flags = 0;
bbbdff9e 2011
77fdaa12 2012 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2013
2014 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2015 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2016 else
2017 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2018}
2019
77fdaa12
JB		 2020/* scan finished notification */
2021void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2022{
77fdaa12 2023 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2024
77fdaa12
JB		 2025 /* Restart STA timers */
2026 rcu_read_lock();
2027 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2028 ieee80211_restart_sta_timer(sdata);
2029 rcu_read_unlock();
2030}
60f8b39c 2031
77fdaa12
JB		 2032int ieee80211_max_network_latency(struct notifier_block *nb,
2033 unsigned long data, void *dummy)
2034{
2035 s32 latency_usec = (s32) data;
2036 struct ieee80211_local *local =
2037 container_of(nb, struct ieee80211_local,
2038 network_latency_notifier);
1fa6f4af 2039
77fdaa12
JB		 2040 mutex_lock(&local->iflist_mtx);
2041 ieee80211_recalc_ps(local, latency_usec);
2042 mutex_unlock(&local->iflist_mtx);
dfe67012 2043
77fdaa12 2044 return 0;
9c6bd790
JB		 2045}
2046
77fdaa12 2047/* config hooks */
af6b6374
JB		 2048static enum work_done_result
2049ieee80211_probe_auth_done(struct ieee80211_work *wk,
2050 struct sk_buff *skb)
2051{
2052 if (!skb) {
2053 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2054 return WORK_DONE_DESTROY;
2055 }
2056
2057 if (wk->type == IEEE80211_WORK_AUTH) {
2058 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2059 return WORK_DONE_DESTROY;
2060 }
2061
2062 mutex_lock(&wk->sdata->u.mgd.mtx);
2063 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2064 mutex_unlock(&wk->sdata->u.mgd.mtx);
2065
2066 wk->type = IEEE80211_WORK_AUTH;
2067 wk->probe_auth.tries = 0;
2068 return WORK_DONE_REQUEUE;
2069}
2070
77fdaa12
JB		 2071int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2072 struct cfg80211_auth_request *req)
9c6bd790 2073{
77fdaa12 2074 const u8 *ssid;
f679f65d 2075 struct ieee80211_work *wk;
77fdaa12 2076 u16 auth_alg;
9c6bd790 2077
d5cdfacb
JM		 2078 if (req->local_state_change)
2079 return 0; /* no need to update mac80211 state */
2080
77fdaa12
JB		 2081 switch (req->auth_type) {
2082 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2083 auth_alg = WLAN_AUTH_OPEN;
2084 break;
2085 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2086 if (IS_ERR(sdata->local->wep_tx_tfm))
2087 return -EOPNOTSUPP;
77fdaa12
JB		 2088 auth_alg = WLAN_AUTH_SHARED_KEY;
2089 break;
2090 case NL80211_AUTHTYPE_FT:
2091 auth_alg = WLAN_AUTH_FT;
2092 break;
2093 case NL80211_AUTHTYPE_NETWORK_EAP:
2094 auth_alg = WLAN_AUTH_LEAP;
2095 break;
2096 default:
2097 return -EOPNOTSUPP;
60f8b39c 2098 }
77fdaa12
JB		 2099
2100 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2101 if (!wk)
9c6bd790 2102 return -ENOMEM;
77fdaa12 2103
5e124bd5 2104 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2105
2106 if (req->ie && req->ie_len) {
2107 memcpy(wk->ie, req->ie, req->ie_len);
2108 wk->ie_len = req->ie_len;
9c6bd790 2109 }
77fdaa12 2110
fffd0934 2111 if (req->key && req->key_len) {
af6b6374
JB		 2112 wk->probe_auth.key_len = req->key_len;
2113 wk->probe_auth.key_idx = req->key_idx;
2114 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2115 }
2116
77fdaa12 2117 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2118 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2119 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2120
af6b6374
JB		 2121 wk->probe_auth.algorithm = auth_alg;
2122 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2123
070bb547
JB		 2124 /* if we already have a probe, don't probe again */
2125 if (req->bss->proberesp_ies)
2126 wk->type = IEEE80211_WORK_AUTH;
2127 else
2128 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2129 wk->chan = req->bss->channel;
af6b6374
JB		 2130 wk->sdata = sdata;
2131 wk->done = ieee80211_probe_auth_done;
77fdaa12 2132
af6b6374 2133 ieee80211_add_work(wk);
9c6bd790 2134 return 0;
60f8b39c
JB		 2135}
2136
af6b6374
JB		 2137static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2138 struct sk_buff *skb)
2139{
2140 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2141 struct ieee80211_rx_status *rx_status;
2142 struct ieee802_11_elems elems;
af6b6374
JB		 2143 u16 status;
2144
2145 if (!skb) {
2146 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2147 return WORK_DONE_DESTROY;
2148 }
2149
e5b900d2
JB		 2150 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2151 mutex_lock(&wk->sdata->u.mgd.mtx);
2152 rx_status = (void *) skb->cb;
2153 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2154 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2155 &elems, true);
2156 mutex_unlock(&wk->sdata->u.mgd.mtx);
2157
2158 wk->type = IEEE80211_WORK_ASSOC;
2159 /* not really done yet */
2160 return WORK_DONE_REQUEUE;
2161 }
2162
af6b6374
JB		 2163 mgmt = (void *)skb->data;
2164 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2165
2166 if (status == WLAN_STATUS_SUCCESS) {
2167 mutex_lock(&wk->sdata->u.mgd.mtx);
2168 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2169 mutex_unlock(&wk->sdata->u.mgd.mtx);
2170 /* oops -- internal error -- send timeout for now */
2171 cfg80211_send_assoc_timeout(wk->sdata->dev,
2172 wk->filter_ta);
2173 return WORK_DONE_DESTROY;
2174 }
68542962
JO		 2175
2176 mutex_unlock(&wk->sdata->u.mgd.mtx);
af6b6374
JB		 2177 }
2178
2179 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2180 return WORK_DONE_DESTROY;
2181}
2182
77fdaa12
JB		 2183int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2184 struct cfg80211_assoc_request *req)
f0706e82 2185{
77fdaa12 2186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2187 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2188 struct ieee80211_work *wk;
63f170e0 2189 const u8 *ssid;
af6b6374 2190 int i;
f0706e82 2191
77fdaa12 2192 mutex_lock(&ifmgd->mtx);
af6b6374 2193 if (ifmgd->associated) {
9c87ba67
JM		 2194 if (!req->prev_bssid ||
2195 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2196 ETH_ALEN)) {
2197 /*
2198 * We are already associated and the request was not a
2199 * reassociation request from the current BSS, so
2200 * reject it.
2201 */
2202 mutex_unlock(&ifmgd->mtx);
2203 return -EALREADY;
2204 }
2205
2206 /* Trying to reassociate - clear previous association state */
e69e95db 2207 ieee80211_set_disassoc(sdata, true);
af6b6374
JB		 2208 }
2209 mutex_unlock(&ifmgd->mtx);
77fdaa12 2210
63f170e0 2211 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2212 if (!wk)
2213 return -ENOMEM;
77fdaa12 2214
77fdaa12 2215 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2216 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2217
d8ec4433
JO		 2218 ifmgd->beacon_crc_valid = false;
2219
77fdaa12
JB		 2220 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2221 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2222 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2223 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2224 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2225
77fdaa12
JB		 2226
2227 if (req->ie && req->ie_len) {
2228 memcpy(wk->ie, req->ie, req->ie_len);
2229 wk->ie_len = req->ie_len;
2230 } else
2231 wk->ie_len = 0;
2232
0c1ad2ca 2233 wk->assoc.bss = req->bss;
f679f65d 2234
af6b6374 2235 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2236
af6b6374
JB		 2237 /* new association always uses requested smps mode */
2238 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2239 if (ifmgd->powersave)
2240 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2241 else
2242 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2243 } else
2244 ifmgd->ap_smps = ifmgd->req_smps;
2245
2246 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2247 /*
2248 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2249 * We still associate in non-HT mode (11a/b/g) if any one of these
2250 * ciphers is configured as pairwise.
2251 * We can set this to true for non-11n hardware, that'll be checked
2252 * separately along with the peer capabilities.
2253 */
af6b6374 2254 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2255 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2256 wk->assoc.wmm_used = bss->wmm_used;
2257 wk->assoc.supp_rates = bss->supp_rates;
2258 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2259 wk->assoc.ht_information_ie =
2260 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2261
ab13315a
KV		 2262 if (bss->wmm_used && bss->uapsd_supported &&
2263 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2264 wk->assoc.uapsd_used = true;
2265 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2266 } else {
2267 wk->assoc.uapsd_used = false;
2268 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2269 }
2270
63f170e0 2271 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2272 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2273 wk->assoc.ssid_len = ssid[1];
63f170e0 2274
77fdaa12 2275 if (req->prev_bssid)
f679f65d 2276 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2277
f679f65d 2278 wk->chan = req->bss->channel;
af6b6374
JB		 2279 wk->sdata = sdata;
2280 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2281 if (!bss->dtim_period &&
2282 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2283 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2284 else
2285 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2286
2287 if (req->use_mfp) {
2288 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2289 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2290 } else {
2291 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2292 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2293 }
2294
2295 if (req->crypto.control_port)
2296 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2297 else
2298 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2299
a621fa4d
JB		 2300 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2301 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2302
af6b6374
JB		 2303 ieee80211_add_work(wk);
2304 return 0;
f0706e82
JB		 2305}
2306
77fdaa12 2307int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2308 struct cfg80211_deauth_request *req,
2309 void *cookie)
f0706e82 2310{
af6b6374 2311 struct ieee80211_local *local = sdata->local;
46900298 2312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2313 struct ieee80211_work *wk;
05e48e8e
JM		 2314 u8 bssid[ETH_ALEN];
2315 bool assoc_bss = false;
f0706e82 2316
77fdaa12
JB		 2317 mutex_lock(&ifmgd->mtx);
2318
05e48e8e 2319 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2320 if (ifmgd->associated == req->bss) {
05e48e8e 2321 ieee80211_set_disassoc(sdata, false);
af6b6374 2322 mutex_unlock(&ifmgd->mtx);
05e48e8e 2323 assoc_bss = true;
af6b6374
JB		 2324 } else {
2325 bool not_auth_yet = false;
f0706e82 2326
a58ce43f 2327 mutex_unlock(&ifmgd->mtx);
a58ce43f 2328
a1699b75 2329 mutex_lock(&local->mtx);
af6b6374 2330 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2331 if (wk->sdata != sdata)
af6b6374 2332 continue;
29165e4c
JB		 2333
2334 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2335 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2336 wk->type != IEEE80211_WORK_ASSOC &&
2337 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2338 continue;
2339
af6b6374
JB		 2340 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2341 continue;
29165e4c
JB		 2342
2343 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2344 list_del_rcu(&wk->list);
af6b6374
JB		 2345 free_work(wk);
2346 break;
2347 }
a1699b75 2348 mutex_unlock(&local->mtx);
af6b6374
JB		 2349
2350 /*
2351 * If somebody requests authentication and we haven't
2352 * sent out an auth frame yet there's no need to send
2353 * out a deauth frame either. If the state was PROBE,
2354 * then this is the case. If it's AUTH we have sent a
2355 * frame, and if it's IDLE we have completed the auth
2356 * process already.
2357 */
2358 if (not_auth_yet) {
2359 __cfg80211_auth_canceled(sdata->dev, bssid);
2360 return 0;
2361 }
2362 }
77fdaa12 2363
0ff71613 2364 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2365 sdata->name, bssid, req->reason_code);
0ff71613 2366
d5cdfacb
JM		 2367 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2368 req->reason_code, cookie,
2369 !req->local_state_change);
05e48e8e
JM		 2370 if (assoc_bss)
2371 sta_info_destroy_addr(sdata, bssid);
f0706e82 2372
7da7cc1d 2373 mutex_lock(&sdata->local->mtx);
bc83b681 2374 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2375 mutex_unlock(&sdata->local->mtx);
bc83b681 2376
f0706e82
JB		 2377 return 0;
2378}
84363e6e 2379
77fdaa12 2380int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2381 struct cfg80211_disassoc_request *req,
2382 void *cookie)
9c6bd790 2383{
77fdaa12 2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2385 u8 bssid[ETH_ALEN];
9c6bd790 2386
77fdaa12 2387 mutex_lock(&ifmgd->mtx);
10f644a4 2388
8d8b261a
JB		 2389 /*
2390 * cfg80211 should catch this ... but it's racy since
2391 * we can receive a disassoc frame, process it, hand it
2392 * to cfg80211 while that's in a locked section already
2393 * trying to tell us that the user wants to disconnect.
2394 */
0c1ad2ca 2395 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2396 mutex_unlock(&ifmgd->mtx);
2397 return -ENOLINK;
2398 }
2399
0ff71613 2400 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2401 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2402
e69e95db
JM		 2403 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2404 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2405
2406 mutex_unlock(&ifmgd->mtx);
10f644a4 2407
77fdaa12 2408 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2409 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2410 cookie, !req->local_state_change);
e69e95db 2411 sta_info_destroy_addr(sdata, bssid);
bc83b681 2412
7da7cc1d 2413 mutex_lock(&sdata->local->mtx);
bc83b681 2414 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2415 mutex_unlock(&sdata->local->mtx);
bc83b681 2416
10f644a4
JB		 2417 return 0;
2418}
026331c4 2419
a97c13c3
JO		 2420void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2421 enum nl80211_cqm_rssi_threshold_event rssi_event,
2422 gfp_t gfp)
2423{
2424 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2425
b5878a2d
JB		 2426 trace_api_cqm_rssi_notify(sdata, rssi_event);
2427
a97c13c3
JO		 2428 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2429}
2430EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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