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net:rfkill: add a gpio setup function into GPIO rfkill
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
d5522e03
JB		 165{
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
d5522e03
JB		 168 struct sta_info *sta;
169 u32 changed = 0;
172710bf 170 int hti_cfreq;
9ed6bcce 171 u16 ht_opmode;
0aaffa9b
JB		 172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
175
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
177
0aaffa9b
JB		 178 prev_chantype = sdata->vif.bss_conf.channel_type;
179
d5522e03
JB		 180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
182 enable_ht = false;
183
172710bf
BG		 184 if (enable_ht) {
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
186 sband->band);
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
192 */
193 printk(KERN_DEBUG
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
198 sdata->name,
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
201 sband->band);
202 enable_ht = false;
203 }
204 }
d5522e03
JB		 205
206 if (enable_ht) {
207 channel_type = NL80211_CHAN_HT20;
208
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
211 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
212 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 214 if (!(local->hw.conf.channel->flags &
215 IEEE80211_CHAN_NO_HT40PLUS))
216 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 217 break;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40MINUS))
221 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 222 break;
223 }
224 }
225 }
226
fe6f212c
RC		 227 if (local->tmp_channel)
228 local->tmp_channel_type = channel_type;
d5522e03 229
0aaffa9b
JB		 230 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type = NL80211_CHAN_HT20;
233 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
234 }
d5522e03 235
7cc44ed4
RM		 236 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
237 /*
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
241 */
242 ieee80211_stop_queues_by_reason(&sdata->local->hw,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
244
245 /* flush out all packets */
246 synchronize_net();
247
248 drv_flush(local, false);
249 }
250
0aaffa9b
JB		 251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local, 0);
d5522e03 253
0aaffa9b 254 if (prev_chantype != channel_type) {
d5522e03 255 rcu_read_lock();
abe60632 256 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 257 if (sta)
258 rate_control_rate_update(local, sband, sta,
4fa00437 259 IEEE80211_RC_HT_CHANGED,
0aaffa9b 260 channel_type);
d5522e03 261 rcu_read_unlock();
7cc44ed4
RM		 262
263 if (beacon_htcap_ie)
264 ieee80211_wake_queues_by_reason(&sdata->local->hw,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 266 }
d5522e03 267
9ed6bcce 268 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 269
270 /* if bss configuration changed store the new one */
0aaffa9b
JB		 271 if (sdata->ht_opmode_valid != enable_ht ||
272 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
273 prev_chantype != channel_type) {
d5522e03 274 changed |= BSS_CHANGED_HT;
9ed6bcce 275 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 276 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 277 }
278
279 return changed;
280}
281
9c6bd790
JB		 282/* frame sending functions */
283
ef422bc0 284static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 285 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 286 void *cookie, bool send_frame)
9ac19a90
JB		 287{
288 struct ieee80211_local *local = sdata->local;
46900298 289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 290 struct sk_buff *skb;
291 struct ieee80211_mgmt *mgmt;
9aed3cc1 292
65fc73ac 293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 294 if (!skb)
9ac19a90 295 return;
d15b8459 296
9ac19a90
JB		 297 skb_reserve(skb, local->hw.extra_tx_headroom);
298
299 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
300 memset(mgmt, 0, 24);
77fdaa12 301 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 305 skb_put(skb, 2);
ef422bc0 306 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 307 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
308
53b46b84 309 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 310 if (cookie)
311 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
312 else
313 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 314 else
ce470613
HS		 315 if (cookie)
316 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
317 else
318 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 319 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 321
322 if (send_frame)
323 ieee80211_tx_skb(sdata, skb);
324 else
325 kfree_skb(skb);
9ac19a90
JB		 326}
327
572e0012
KV		 328void ieee80211_send_pspoll(struct ieee80211_local *local,
329 struct ieee80211_sub_if_data *sdata)
330{
572e0012
KV		 331 struct ieee80211_pspoll *pspoll;
332 struct sk_buff *skb;
572e0012 333
d8cd189e
KV		 334 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
335 if (!skb)
572e0012 336 return;
572e0012 337
d8cd189e
KV		 338 pspoll = (struct ieee80211_pspoll *) skb->data;
339 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 340
62ae67be
JB		 341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 343}
344
965bedad
JB		 345void ieee80211_send_nullfunc(struct ieee80211_local *local,
346 struct ieee80211_sub_if_data *sdata,
347 int powersave)
348{
349 struct sk_buff *skb;
d8cd189e 350 struct ieee80211_hdr_3addr *nullfunc;
965bedad 351
d8cd189e
KV		 352 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
353 if (!skb)
965bedad 354 return;
965bedad 355
d8cd189e 356 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 357 if (powersave)
d8cd189e 358 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 359
62ae67be
JB		 360 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
361 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 362}
363
d524215f
FF		 364static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
365 struct ieee80211_sub_if_data *sdata)
366{
367 struct sk_buff *skb;
368 struct ieee80211_hdr *nullfunc;
369 __le16 fc;
370
371 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
372 return;
373
374 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 375 if (!skb)
d524215f 376 return;
d15b8459 377
d524215f
FF		 378 skb_reserve(skb, local->hw.extra_tx_headroom);
379
380 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
381 memset(nullfunc, 0, 30);
382 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
383 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
384 nullfunc->frame_control = fc;
385 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
386 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
387 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
388 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
389
390 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
391 ieee80211_tx_skb(sdata, skb);
392}
393
cc32abd4
JB		 394/* spectrum management related things */
395static void ieee80211_chswitch_work(struct work_struct *work)
396{
397 struct ieee80211_sub_if_data *sdata =
398 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
400
9607e6b6 401 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 402 return;
403
77fdaa12
JB		 404 mutex_lock(&ifmgd->mtx);
405 if (!ifmgd->associated)
406 goto out;
cc32abd4
JB		 407
408 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 409 if (!sdata->local->ops->channel_switch) {
410 /* call "hw_config" only if doing sw channel switch */
411 ieee80211_hw_config(sdata->local,
412 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 413 } else {
414 /* update the device channel directly */
415 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 416 }
77fdaa12 417
cc32abd4 418 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 419 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 420
cc32abd4
JB		 421 ieee80211_wake_queues_by_reason(&sdata->local->hw,
422 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 423 out:
424 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
425 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 426}
427
5ce6e438
JB		 428void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
429{
430 struct ieee80211_sub_if_data *sdata;
431 struct ieee80211_if_managed *ifmgd;
432
433 sdata = vif_to_sdata(vif);
434 ifmgd = &sdata->u.mgd;
435
436 trace_api_chswitch_done(sdata, success);
437 if (!success) {
438 /*
439 * If the channel switch was not successful, stay
440 * around on the old channel. We currently lack
441 * good handling of this situation, possibly we
442 * should just drop the association.
443 */
444 sdata->local->csa_channel = sdata->local->oper_channel;
445 }
446
447 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
448}
449EXPORT_SYMBOL(ieee80211_chswitch_done);
450
cc32abd4
JB		 451static void ieee80211_chswitch_timer(unsigned long data)
452{
453 struct ieee80211_sub_if_data *sdata =
454 (struct ieee80211_sub_if_data *) data;
455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
456
5bb644a0
JB		 457 if (sdata->local->quiescing) {
458 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
459 return;
460 }
461
42935eca 462 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 463}
464
465void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
466 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 467 struct ieee80211_bss *bss,
468 u64 timestamp)
cc32abd4 469{
0c1ad2ca
JB		 470 struct cfg80211_bss *cbss =
471 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 472 struct ieee80211_channel *new_ch;
473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 474 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
475 cbss->channel->band);
cc32abd4 476
77fdaa12
JB		 477 ASSERT_MGD_MTX(ifmgd);
478
479 if (!ifmgd->associated)
cc32abd4
JB		 480 return;
481
fbe9c429 482 if (sdata->local->scanning)
cc32abd4
JB		 483 return;
484
485 /* Disregard subsequent beacons if we are already running a timer
486 processing a CSA */
487
488 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
489 return;
490
491 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
492 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
493 return;
494
495 sdata->local->csa_channel = new_ch;
496
5ce6e438
JB		 497 if (sdata->local->ops->channel_switch) {
498 /* use driver's channel switch callback */
499 struct ieee80211_channel_switch ch_switch;
500 memset(&ch_switch, 0, sizeof(ch_switch));
501 ch_switch.timestamp = timestamp;
502 if (sw_elem->mode) {
503 ch_switch.block_tx = true;
504 ieee80211_stop_queues_by_reason(&sdata->local->hw,
505 IEEE80211_QUEUE_STOP_REASON_CSA);
506 }
507 ch_switch.channel = new_ch;
508 ch_switch.count = sw_elem->count;
509 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
510 drv_channel_switch(sdata->local, &ch_switch);
511 return;
512 }
513
514 /* channel switch handled in software */
cc32abd4 515 if (sw_elem->count <= 1) {
42935eca 516 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 517 } else {
9feaddc7
WYG		 518 if (sw_elem->mode)
519 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 520 IEEE80211_QUEUE_STOP_REASON_CSA);
521 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
522 mod_timer(&ifmgd->chswitch_timer,
523 jiffies +
524 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 525 cbss->beacon_interval));
cc32abd4
JB		 526 }
527}
528
529static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
530 u16 capab_info, u8 *pwr_constr_elem,
531 u8 pwr_constr_elem_len)
532{
533 struct ieee80211_conf *conf = &sdata->local->hw.conf;
534
535 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
536 return;
537
538 /* Power constraint IE length should be 1 octet */
539 if (pwr_constr_elem_len != 1)
540 return;
541
542 if ((*pwr_constr_elem <= conf->channel->max_power) &&
543 (*pwr_constr_elem != sdata->local->power_constr_level)) {
544 sdata->local->power_constr_level = *pwr_constr_elem;
545 ieee80211_hw_config(sdata->local, 0);
546 }
547}
548
f90754c1
JO		 549void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
550{
551 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
552 struct ieee80211_local *local = sdata->local;
553 struct ieee80211_conf *conf = &local->hw.conf;
554
555 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
556 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
557 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
558
559 local->disable_dynamic_ps = false;
560 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
561}
562EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
563
564void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
565{
566 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
567 struct ieee80211_local *local = sdata->local;
568 struct ieee80211_conf *conf = &local->hw.conf;
569
570 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
571 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
572 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
573
574 local->disable_dynamic_ps = true;
575 conf->dynamic_ps_timeout = 0;
576 del_timer_sync(&local->dynamic_ps_timer);
577 ieee80211_queue_work(&local->hw,
578 &local->dynamic_ps_enable_work);
579}
580EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
581
965bedad
JB		 582/* powersave */
583static void ieee80211_enable_ps(struct ieee80211_local *local,
584 struct ieee80211_sub_if_data *sdata)
585{
586 struct ieee80211_conf *conf = &local->hw.conf;
587
d5edaedc
JB		 588 /*
589 * If we are scanning right now then the parameters will
590 * take effect when scan finishes.
591 */
fbe9c429 592 if (local->scanning)
d5edaedc
JB		 593 return;
594
965bedad
JB		 595 if (conf->dynamic_ps_timeout > 0 &&
596 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
597 mod_timer(&local->dynamic_ps_timer, jiffies +
598 msecs_to_jiffies(conf->dynamic_ps_timeout));
599 } else {
600 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
601 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 602
2a13052f
JO		 603 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
604 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
605 return;
606
607 conf->flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 609 }
610}
611
612static void ieee80211_change_ps(struct ieee80211_local *local)
613{
614 struct ieee80211_conf *conf = &local->hw.conf;
615
616 if (local->ps_sdata) {
965bedad
JB		 617 ieee80211_enable_ps(local, local->ps_sdata);
618 } else if (conf->flags & IEEE80211_CONF_PS) {
619 conf->flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 del_timer_sync(&local->dynamic_ps_timer);
622 cancel_work_sync(&local->dynamic_ps_enable_work);
623 }
624}
625
808118cb
JY		 626static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
627{
628 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
629 struct sta_info *sta = NULL;
c2c98fde 630 bool authorized = false;
808118cb
JY		 631
632 if (!mgd->powersave)
633 return false;
634
635 if (!mgd->associated)
636 return false;
637
638 if (!mgd->associated->beacon_ies)
639 return false;
640
641 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
642 IEEE80211_STA_CONNECTION_POLL))
643 return false;
644
645 rcu_read_lock();
646 sta = sta_info_get(sdata, mgd->bssid);
647 if (sta)
c2c98fde 648 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 649 rcu_read_unlock();
650
c2c98fde 651 return authorized;
808118cb
JY		 652}
653
965bedad 654/* need to hold RTNL or interface lock */
10f644a4 655void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 656{
657 struct ieee80211_sub_if_data *sdata, *found = NULL;
658 int count = 0;
195e294d 659 int timeout;
965bedad
JB		 660
661 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
662 local->ps_sdata = NULL;
663 return;
664 }
665
af6b6374
JB		 666 if (!list_empty(&local->work_list)) {
667 local->ps_sdata = NULL;
668 goto change;
669 }
670
965bedad 671 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 672 if (!ieee80211_sdata_running(sdata))
965bedad 673 continue;
8c7914de
RM		 674 if (sdata->vif.type == NL80211_IFTYPE_AP) {
675 /* If an AP vif is found, then disable PS
676 * by setting the count to zero thereby setting
677 * ps_sdata to NULL.
678 */
679 count = 0;
680 break;
681 }
965bedad
JB		 682 if (sdata->vif.type != NL80211_IFTYPE_STATION)
683 continue;
684 found = sdata;
685 count++;
686 }
687
808118cb 688 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 689 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 690 s32 beaconint_us;
691
692 if (latency < 0)
ed77134b 693 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 694
695 beaconint_us = ieee80211_tu_to_usec(
696 found->vif.bss_conf.beacon_int);
697
ff616381 698 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 699 if (timeout < 0) {
700 /*
ff616381
JO		 701 * Go to full PSM if the user configures a very low
702 * latency requirement.
0ab82b04
EP		 703 * The 2000 second value is there for compatibility
704 * until the PM_QOS_NETWORK_LATENCY is configured
705 * with real values.
195e294d 706 */
0ab82b04
EP		 707 if (latency > (1900 * USEC_PER_MSEC) &&
708 latency != (2000 * USEC_PER_SEC))
195e294d 709 timeout = 0;
ff616381
JO		 710 else
711 timeout = 100;
195e294d 712 }
f90754c1
JO		 713 local->dynamic_ps_user_timeout = timeout;
714 if (!local->disable_dynamic_ps)
715 conf->dynamic_ps_timeout =
716 local->dynamic_ps_user_timeout;
195e294d 717
04fe2037 718 if (beaconint_us > latency) {
10f644a4 719 local->ps_sdata = NULL;
04fe2037 720 } else {
56007a02 721 struct ieee80211_bss *bss;
04fe2037 722 int maxslp = 1;
56007a02 723 u8 dtimper;
04fe2037 724
56007a02
JB		 725 bss = (void *)found->u.mgd.associated->priv;
726 dtimper = bss->dtim_period;
727
728 /* If the TIM IE is invalid, pretend the value is 1 */
729 if (!dtimper)
730 dtimper = 1;
731 else if (dtimper > 1)
04fe2037
JB		 732 maxslp = min_t(int, dtimper,
733 latency / beaconint_us);
734
9ccebe61 735 local->hw.conf.max_sleep_period = maxslp;
56007a02 736 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 737 local->ps_sdata = found;
04fe2037 738 }
10f644a4 739 } else {
965bedad 740 local->ps_sdata = NULL;
10f644a4 741 }
965bedad 742
af6b6374 743 change:
965bedad
JB		 744 ieee80211_change_ps(local);
745}
746
747void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
748{
749 struct ieee80211_local *local =
750 container_of(work, struct ieee80211_local,
751 dynamic_ps_disable_work);
752
753 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
754 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
755 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
756 }
757
758 ieee80211_wake_queues_by_reason(&local->hw,
759 IEEE80211_QUEUE_STOP_REASON_PS);
760}
761
762void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
763{
764 struct ieee80211_local *local =
765 container_of(work, struct ieee80211_local,
766 dynamic_ps_enable_work);
767 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 768 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 769 unsigned long flags;
770 int q;
965bedad
JB		 771
772 /* can only happen when PS was just disabled anyway */
773 if (!sdata)
774 return;
775
5e34069c
CL		 776 ifmgd = &sdata->u.mgd;
777
965bedad
JB		 778 if (local->hw.conf.flags & IEEE80211_CONF_PS)
779 return;
780
77b7023a
AN		 781 if (!local->disable_dynamic_ps &&
782 local->hw.conf.dynamic_ps_timeout > 0) {
783 /* don't enter PS if TX frames are pending */
784 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 785 mod_timer(&local->dynamic_ps_timer, jiffies +
786 msecs_to_jiffies(
787 local->hw.conf.dynamic_ps_timeout));
788 return;
789 }
77b7023a
AN		 790
791 /*
792 * transmission can be stopped by others which leads to
793 * dynamic_ps_timer expiry. Postpone the ps timer if it
794 * is not the actual idle state.
795 */
796 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
797 for (q = 0; q < local->hw.queues; q++) {
798 if (local->queue_stop_reasons[q]) {
799 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
800 flags);
801 mod_timer(&local->dynamic_ps_timer, jiffies +
802 msecs_to_jiffies(
803 local->hw.conf.dynamic_ps_timeout));
804 return;
805 }
806 }
807 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 808 }
1ddc2867 809
375177bf 810 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 811 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
812 netif_tx_stop_all_queues(sdata->dev);
965bedad 813
e8306f98
VN		 814 if (drv_tx_frames_pending(local))
815 mod_timer(&local->dynamic_ps_timer, jiffies +
816 msecs_to_jiffies(
817 local->hw.conf.dynamic_ps_timeout));
818 else {
819 ieee80211_send_nullfunc(local, sdata, 1);
820 /* Flush to get the tx status of nullfunc frame */
821 drv_flush(local, false);
822 }
f3e85b9e
VN		 823 }
824
2a13052f
JO		 825 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
826 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 827 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
828 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
829 local->hw.conf.flags |= IEEE80211_CONF_PS;
830 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
831 }
f3e85b9e 832
77b7023a
AN		 833 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
834 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 835}
836
837void ieee80211_dynamic_ps_timer(unsigned long data)
838{
839 struct ieee80211_local *local = (void *) data;
840
78f1a8b7 841 if (local->quiescing || local->suspended)
5bb644a0
JB		 842 return;
843
42935eca 844 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 845}
846
60f8b39c 847/* MLME */
f698d856 848static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 849 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 850 u8 *wmm_param, size_t wmm_param_len)
851{
f0706e82 852 struct ieee80211_tx_queue_params params;
4ced3f74 853 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 854 size_t left;
855 int count;
ab13315a 856 u8 *pos, uapsd_queues = 0;
f0706e82 857
e1b3ec1a
SG		 858 if (!local->ops->conf_tx)
859 return;
860
af6b6374 861 if (local->hw.queues < 4)
3434fbd3
JB		 862 return;
863
864 if (!wmm_param)
865 return;
866
f0706e82
JB		 867 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
868 return;
ab13315a
KV		 869
870 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 871 uapsd_queues = local->uapsd_queues;
ab13315a 872
f0706e82 873 count = wmm_param[6] & 0x0f;
46900298 874 if (count == ifmgd->wmm_last_param_set)
f0706e82 875 return;
46900298 876 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 877
878 pos = wmm_param + 8;
879 left = wmm_param_len - 8;
880
881 memset(&params, 0, sizeof(params));
882
f0706e82
JB		 883 local->wmm_acm = 0;
884 for (; left >= 4; left -= 4, pos += 4) {
885 int aci = (pos[0] >> 5) & 0x03;
886 int acm = (pos[0] >> 4) & 0x01;
ab13315a 887 bool uapsd = false;
f0706e82
JB		 888 int queue;
889
890 switch (aci) {
0eeb59fe 891 case 1: /* AC_BK */
e100bb64 892 queue = 3;
988c0f72 893 if (acm)
0eeb59fe 894 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 895 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
896 uapsd = true;
f0706e82 897 break;
0eeb59fe 898 case 2: /* AC_VI */
e100bb64 899 queue = 1;
988c0f72 900 if (acm)
0eeb59fe 901 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 902 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
903 uapsd = true;
f0706e82 904 break;
0eeb59fe 905 case 3: /* AC_VO */
e100bb64 906 queue = 0;
988c0f72 907 if (acm)
0eeb59fe 908 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 909 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
910 uapsd = true;
f0706e82 911 break;
0eeb59fe 912 case 0: /* AC_BE */
f0706e82 913 default:
e100bb64 914 queue = 2;
988c0f72 915 if (acm)
0eeb59fe 916 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 917 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
918 uapsd = true;
f0706e82
JB		 919 break;
920 }
921
922 params.aifs = pos[0] & 0x0f;
923 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
924 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 925 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 926 params.uapsd = uapsd;
927
f4ea83dd 928#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 929 wiphy_debug(local->hw.wiphy,
930 "WMM queue=%d aci=%d acm=%d aifs=%d "
931 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
932 queue, aci, acm,
933 params.aifs, params.cw_min, params.cw_max,
934 params.txop, params.uapsd);
3330d7be 935#endif
f6f3def3
EP		 936 sdata->tx_conf[queue] = params;
937 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 938 wiphy_debug(local->hw.wiphy,
939 "failed to set TX queue parameters for queue %d\n",
940 queue);
f0706e82 941 }
e1b3ec1a
SG		 942
943 /* enable WMM or activate new settings */
4ced3f74
JB		 944 sdata->vif.bss_conf.qos = true;
945 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 946}
947
7a5158ef
JB		 948static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
949 u16 capab, bool erp_valid, u8 erp)
5628221c 950{
bda3933a 951 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 952 u32 changed = 0;
7a5158ef
JB		 953 bool use_protection;
954 bool use_short_preamble;
955 bool use_short_slot;
956
957 if (erp_valid) {
958 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
959 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
960 } else {
961 use_protection = false;
962 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
963 }
964
965 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 966 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
967 use_short_slot = true;
5628221c 968
471b3efd 969 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 970 bss_conf->use_cts_prot = use_protection;
971 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 972 }
7e9ed188 973
d43c7b37 974 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 975 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 976 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 977 }
d9430a32 978
7a5158ef 979 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 980 bss_conf->use_short_slot = use_short_slot;
981 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 982 }
983
984 return changed;
985}
986
f698d856 987static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 988 struct cfg80211_bss *cbss,
ae5eb026 989 u32 bss_info_changed)
f0706e82 990{
0c1ad2ca 991 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 992 struct ieee80211_local *local = sdata->local;
68542962 993 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 994
ae5eb026 995 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 996 /* set timing information */
68542962
JO		 997 bss_conf->beacon_int = cbss->beacon_interval;
998 bss_conf->timestamp = cbss->tsf;
5628221c 999
77fdaa12
JB		 1000 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1001 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1002 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1003
7ccc8bd7
FF		 1004 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1005 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1006
0c1ad2ca
JB		 1007 sdata->u.mgd.associated = cbss;
1008 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1009
17e4ec14
JM		 1010 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1011
b291ba11
JB		 1012 /* just to be sure */
1013 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1014 IEEE80211_STA_BEACON_POLL);
1015
9ac19a90 1016 ieee80211_led_assoc(local, 1);
9306102e 1017
e5b900d2
JB		 1018 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1019 bss_conf->dtim_period = bss->dtim_period;
1020 else
1021 bss_conf->dtim_period = 0;
1022
68542962 1023 bss_conf->assoc = 1;
96dd22ac
JB		 1024 /*
1025 * For now just always ask the driver to update the basic rateset
1026 * when we have associated, we aren't checking whether it actually
1027 * changed or not.
1028 */
ae5eb026 1029 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1030
1031 /* And the BSSID changed - we're associated now */
1032 bss_info_changed |= BSS_CHANGED_BSSID;
1033
a97c13c3
JO		 1034 /* Tell the driver to monitor connection quality (if supported) */
1035 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1036 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1037 bss_info_changed |= BSS_CHANGED_CQM;
1038
68542962
JO		 1039 /* Enable ARP filtering */
1040 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1041 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1042 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1043 }
1044
ae5eb026 1045 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1046
056508dc
JB		 1047 mutex_lock(&local->iflist_mtx);
1048 ieee80211_recalc_ps(local, -1);
025e6be2 1049 ieee80211_recalc_smps(local);
056508dc 1050 mutex_unlock(&local->iflist_mtx);
e0cb686f 1051
8a5b33f5 1052 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1053 netif_carrier_on(sdata->dev);
f0706e82
JB		 1054}
1055
e69e95db 1056static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1057 bool remove_sta, bool tx)
aa458d17 1058{
46900298 1059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1060 struct ieee80211_local *local = sdata->local;
1061 struct sta_info *sta;
e0cb686f 1062 u32 changed = 0, config_changed = 0;
b291ba11 1063 u8 bssid[ETH_ALEN];
aa458d17 1064
77fdaa12
JB		 1065 ASSERT_MGD_MTX(ifmgd);
1066
b291ba11
JB		 1067 if (WARN_ON(!ifmgd->associated))
1068 return;
1069
0c1ad2ca 1070 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1071
77fdaa12
JB		 1072 ifmgd->associated = NULL;
1073 memset(ifmgd->bssid, 0, ETH_ALEN);
1074
1075 /*
1076 * we need to commit the associated = NULL change because the
1077 * scan code uses that to determine whether this iface should
1078 * go to/wake up from powersave or not -- and could otherwise
1079 * wake the queues erroneously.
1080 */
1081 smp_mb();
1082
1083 /*
1084 * Thus, we can only afterwards stop the queues -- to account
1085 * for the case where another CPU is finishing a scan at this
1086 * time -- we don't want the scan code to enable queues.
1087 */
aa458d17 1088
8a5b33f5 1089 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1090 netif_carrier_off(sdata->dev);
1091
2a419056 1092 mutex_lock(&local->sta_mtx);
abe60632 1093 sta = sta_info_get(sdata, bssid);
4cad6c7c 1094 if (sta) {
c2c98fde 1095 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1096 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1097 }
2a419056 1098 mutex_unlock(&local->sta_mtx);
aa458d17 1099
f5e5bf25
TW		 1100 changed |= ieee80211_reset_erp_info(sdata);
1101
f5e5bf25 1102 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1103 changed |= BSS_CHANGED_ASSOC;
1104 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1105
aa837e1d
JB		 1106 ieee80211_set_wmm_default(sdata);
1107
4797938c 1108 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1109 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1110
413ad50a
JB		 1111 /* on the next assoc, re-program HT parameters */
1112 sdata->ht_opmode_valid = false;
1113
a8302de9
VT		 1114 local->power_constr_level = 0;
1115
520eb820
KV		 1116 del_timer_sync(&local->dynamic_ps_timer);
1117 cancel_work_sync(&local->dynamic_ps_enable_work);
1118
e0cb686f
KV		 1119 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1120 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1121 config_changed |= IEEE80211_CONF_CHANGE_PS;
1122 }
a331400b 1123 local->ps_sdata = NULL;
ae5eb026 1124
e0cb686f 1125 ieee80211_hw_config(local, config_changed);
9cef8737 1126
68542962
JO		 1127 /* Disable ARP filtering */
1128 if (sdata->vif.bss_conf.arp_filter_enabled) {
1129 sdata->vif.bss_conf.arp_filter_enabled = false;
1130 changed |= BSS_CHANGED_ARP_FILTER;
1131 }
1132
0aaffa9b
JB		 1133 /* The BSSID (not really interesting) and HT changed */
1134 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1135 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1136
07ba55d7 1137 /* remove AP and TDLS peers */
e69e95db 1138 if (remove_sta)
07ba55d7 1139 sta_info_flush(local, sdata);
b9dcf712
JB		 1140
1141 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1142 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1143 del_timer_sync(&sdata->u.mgd.timer);
1144 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1145}
f0706e82 1146
3cf335d5
KV		 1147void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1148 struct ieee80211_hdr *hdr)
1149{
1150 /*
1151 * We can postpone the mgd.timer whenever receiving unicast frames
1152 * from AP because we know that the connection is working both ways
1153 * at that time. But multicast frames (and hence also beacons) must
1154 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1155 * data idle periods for sending the periodic probe request to the
1156 * AP we're connected to.
3cf335d5 1157 */
b291ba11
JB		 1158 if (is_multicast_ether_addr(hdr->addr1))
1159 return;
1160
be099e82 1161 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1162}
f0706e82 1163
4e5ff376
FF		 1164static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1165{
1166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1167
1168 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1169 IEEE80211_STA_CONNECTION_POLL)))
1170 return;
1171
1172 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1173 IEEE80211_STA_BEACON_POLL);
1174 mutex_lock(&sdata->local->iflist_mtx);
1175 ieee80211_recalc_ps(sdata->local, -1);
1176 mutex_unlock(&sdata->local->iflist_mtx);
1177
1178 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1179 return;
1180
1181 /*
1182 * We've received a probe response, but are not sure whether
1183 * we have or will be receiving any beacons or data, so let's
1184 * schedule the timers again, just in case.
1185 */
1186 ieee80211_sta_reset_beacon_monitor(sdata);
1187
1188 mod_timer(&ifmgd->conn_mon_timer,
1189 round_jiffies_up(jiffies +
1190 IEEE80211_CONNECTION_IDLE_TIME));
1191}
1192
1193void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1194 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1195{
75706d0e 1196 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1197 return;
1198
04ac3c0e
FF		 1199 if (ack)
1200 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1201
1202 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1203 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1204 if (ack)
1205 sdata->u.mgd.probe_send_count = 0;
1206 else
1207 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1208 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1209 }
1210}
1211
a43abf29
ML		 1212static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1213{
1214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1215 const u8 *ssid;
f01a067d 1216 u8 *dst = ifmgd->associated->bssid;
180205bd 1217 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1218
1219 /*
1220 * Try sending broadcast probe requests for the last three
1221 * probe requests after the first ones failed since some
1222 * buggy APs only support broadcast probe requests.
1223 */
1224 if (ifmgd->probe_send_count >= unicast_limit)
1225 dst = NULL;
a43abf29 1226
4e5ff376
FF		 1227 /*
1228 * When the hardware reports an accurate Tx ACK status, it's
1229 * better to send a nullfunc frame instead of a probe request,
1230 * as it will kick us off the AP quickly if we aren't associated
1231 * anymore. The timeout will be reset if the frame is ACKed by
1232 * the AP.
1233 */
04ac3c0e
FF		 1234 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1235 ifmgd->nullfunc_failed = false;
4e5ff376 1236 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1237 } else {
4e5ff376 1238 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1239 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1240 (u32) -1, true, false);
4e5ff376 1241 }
a43abf29
ML		 1242
1243 ifmgd->probe_send_count++;
180205bd 1244 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1245 run_again(ifmgd, ifmgd->probe_timeout);
1246}
1247
b291ba11
JB		 1248static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1249 bool beacon)
04de8381 1250{
04de8381 1251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1252 bool already = false;
34bfc411 1253
9607e6b6 1254 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1255 return;
1256
91a3bd76
LR		 1257 if (sdata->local->scanning)
1258 return;
1259
b8bc4b0a
JB		 1260 if (sdata->local->tmp_channel)
1261 return;
1262
77fdaa12
JB		 1263 mutex_lock(&ifmgd->mtx);
1264
1265 if (!ifmgd->associated)
1266 goto out;
1267
a860402d 1268#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1269 if (beacon && net_ratelimit())
1270 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1271 "- sending probe request\n", sdata->name);
a860402d 1272#endif
04de8381 1273
b291ba11
JB		 1274 /*
1275 * The driver/our work has already reported this event or the
1276 * connection monitoring has kicked in and we have already sent
1277 * a probe request. Or maybe the AP died and the driver keeps
1278 * reporting until we disassociate...
1279 *
1280 * In either case we have to ignore the current call to this
1281 * function (except for setting the correct probe reason bit)
1282 * because otherwise we would reset the timer every time and
1283 * never check whether we received a probe response!
1284 */
1285 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1286 IEEE80211_STA_CONNECTION_POLL))
1287 already = true;
1288
1289 if (beacon)
1290 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1291 else
1292 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1293
1294 if (already)
1295 goto out;
1296
4e751843
JB		 1297 mutex_lock(&sdata->local->iflist_mtx);
1298 ieee80211_recalc_ps(sdata->local, -1);
1299 mutex_unlock(&sdata->local->iflist_mtx);
1300
a43abf29
ML		 1301 ifmgd->probe_send_count = 0;
1302 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1303 out:
1304 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1305}
1306
a619a4c0
JO		 1307struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1308 struct ieee80211_vif *vif)
1309{
1310 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1312 struct sk_buff *skb;
1313 const u8 *ssid;
1314
1315 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1316 return NULL;
1317
1318 ASSERT_MGD_MTX(ifmgd);
1319
1320 if (!ifmgd->associated)
1321 return NULL;
1322
1323 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1324 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1325 (u32) -1, ssid + 2, ssid[1],
1326 NULL, 0, true);
a619a4c0
JO		 1327
1328 return skb;
1329}
1330EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1331
1e4dcd01
JO		 1332static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1333{
1334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1335 struct ieee80211_local *local = sdata->local;
1336 u8 bssid[ETH_ALEN];
1337
1338 mutex_lock(&ifmgd->mtx);
1339 if (!ifmgd->associated) {
1340 mutex_unlock(&ifmgd->mtx);
1341 return;
1342 }
1343
1344 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1345
180205bd
BG		 1346 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1347 sdata->name, bssid);
1e4dcd01 1348
53f73c09 1349 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1350 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1351
1352 mutex_lock(&local->mtx);
1353 ieee80211_recalc_idle(local);
1354 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1355 /*
1356 * must be outside lock due to cfg80211,
1357 * but that's not a problem.
1358 */
1359 ieee80211_send_deauth_disassoc(sdata, bssid,
1360 IEEE80211_STYPE_DEAUTH,
1361 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1362 NULL, true);
1e4dcd01
JO		 1363}
1364
1365void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1366{
1367 struct ieee80211_sub_if_data *sdata =
1368 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1369 u.mgd.beacon_connection_loss_work);
b291ba11 1370
1e4dcd01
JO		 1371 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1372 __ieee80211_connection_loss(sdata);
1373 else
1374 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1375}
1376
04de8381
KV		 1377void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1378{
1379 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1380 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1381
b5878a2d
JB		 1382 trace_api_beacon_loss(sdata);
1383
1e4dcd01
JO		 1384 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1385 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1386}
1387EXPORT_SYMBOL(ieee80211_beacon_loss);
1388
1e4dcd01
JO		 1389void ieee80211_connection_loss(struct ieee80211_vif *vif)
1390{
1391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1392 struct ieee80211_hw *hw = &sdata->local->hw;
1393
b5878a2d
JB		 1394 trace_api_connection_loss(sdata);
1395
1e4dcd01
JO		 1396 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1397 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1398}
1399EXPORT_SYMBOL(ieee80211_connection_loss);
1400
1401
77fdaa12
JB		 1402static enum rx_mgmt_action __must_check
1403ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1404 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1405{
46900298 1406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1407 const u8 *bssid = NULL;
f0706e82
JB		 1408 u16 reason_code;
1409
f4ea83dd 1410 if (len < 24 + 2)
77fdaa12 1411 return RX_MGMT_NONE;
f0706e82 1412
77fdaa12
JB		 1413 ASSERT_MGD_MTX(ifmgd);
1414
0c1ad2ca 1415 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1416
1417 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1418
77fdaa12 1419 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1420 sdata->name, bssid, reason_code);
77fdaa12 1421
53f73c09 1422 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1423 mutex_lock(&sdata->local->mtx);
63f170e0 1424 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1425 mutex_unlock(&sdata->local->mtx);
f0706e82 1426
77fdaa12 1427 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1428}
1429
1430
77fdaa12
JB		 1431static enum rx_mgmt_action __must_check
1432ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1433 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1434{
46900298 1435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1436 u16 reason_code;
1437
f4ea83dd 1438 if (len < 24 + 2)
77fdaa12 1439 return RX_MGMT_NONE;
f0706e82 1440
77fdaa12
JB		 1441 ASSERT_MGD_MTX(ifmgd);
1442
1443 if (WARN_ON(!ifmgd->associated))
1444 return RX_MGMT_NONE;
1445
0c1ad2ca 1446 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1447 return RX_MGMT_NONE;
f0706e82
JB		 1448
1449 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1450
0ff71613 1451 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1452 sdata->name, mgmt->sa, reason_code);
f0706e82 1453
53f73c09 1454 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1455 mutex_lock(&sdata->local->mtx);
bc83b681 1456 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1457 mutex_unlock(&sdata->local->mtx);
77fdaa12 1458 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1459}
1460
1461
af6b6374
JB		 1462static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1463 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1464{
af6b6374 1465 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1467 struct ieee80211_local *local = sdata->local;
8318d78a 1468 struct ieee80211_supported_band *sband;
f0706e82 1469 struct sta_info *sta;
0c1ad2ca 1470 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1471 u8 *pos;
881d948c 1472 u32 rates, basic_rates;
af6b6374 1473 u16 capab_info, aid;
f0706e82 1474 struct ieee802_11_elems elems;
bda3933a 1475 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1476 u32 changed = 0;
5d1ec85f
JB		 1477 int i, j, err;
1478 bool have_higher_than_11mbit = false;
ae5eb026 1479 u16 ap_ht_cap_flags;
f0706e82 1480
af6b6374 1481 /* AssocResp and ReassocResp have identical structure */
f0706e82 1482
f0706e82 1483 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1484 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1485
1dd84aa2
JB		 1486 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1487 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1488 "set\n", sdata->name, aid);
1dd84aa2
JB		 1489 aid &= ~(BIT(15) | BIT(14));
1490
af6b6374
JB		 1491 pos = mgmt->u.assoc_resp.variable;
1492 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1493
f0706e82
JB		 1494 if (!elems.supp_rates) {
1495 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1496 sdata->name);
af6b6374 1497 return false;
f0706e82
JB		 1498 }
1499
46900298 1500 ifmgd->aid = aid;
f0706e82 1501
2a33bee2
GE		 1502 mutex_lock(&sdata->local->sta_mtx);
1503 /*
1504 * station info was already allocated and inserted before
1505 * the association and should be available to us
1506 */
1507 sta = sta_info_get_rx(sdata, cbss->bssid);
1508 if (WARN_ON(!sta)) {
1509 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1510 return false;
77fdaa12 1511 }
05e5e883 1512
c2c98fde
JB		 1513 set_sta_flag(sta, WLAN_STA_AUTH);
1514 set_sta_flag(sta, WLAN_STA_ASSOC);
1515 set_sta_flag(sta, WLAN_STA_ASSOC_AP);
5d1ec85f 1516 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
c2c98fde 1517 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
5d1ec85f 1518
60f8b39c
JB		 1519 rates = 0;
1520 basic_rates = 0;
e7480bbb 1521 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1522
60f8b39c
JB		 1523 for (i = 0; i < elems.supp_rates_len; i++) {
1524 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1525 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1526
60f8b39c
JB		 1527 if (rate > 110)
1528 have_higher_than_11mbit = true;
1529
1530 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1531 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1532 rates |= BIT(j);
d61272cb
TW		 1533 if (is_basic)
1534 basic_rates |= BIT(j);
1535 break;
1536 }
f709fc69 1537 }
f709fc69
LCC		 1538 }
1539
60f8b39c
JB		 1540 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1541 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1542 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1543
60f8b39c
JB		 1544 if (rate > 110)
1545 have_higher_than_11mbit = true;
f0706e82 1546
60f8b39c 1547 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1548 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1549 rates |= BIT(j);
d61272cb
TW		 1550 if (is_basic)
1551 basic_rates |= BIT(j);
1552 break;
1553 }
60f8b39c 1554 }
1ebebea8 1555 }
f0706e82 1556
e7480bbb 1557 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1558 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1559
1560 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1561 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1562 have_higher_than_11mbit)
1563 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1564 else
1565 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1566
ab1faead 1567 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1568 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1569 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1570
1571 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1572
4b7679a5 1573 rate_control_rate_init(sta);
f0706e82 1574
46900298 1575 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 1576 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 1577
ddf4ac53 1578 if (elems.wmm_param)
c2c98fde 1579 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 1580
2a33bee2
GE		 1581 /* sta_info_reinsert will also unlock the mutex lock */
1582 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1583 sta = NULL;
1584 if (err) {
1585 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1586 " the AP (error %d)\n", sdata->name, err);
90be561b 1587 return false;
ddf4ac53
JB		 1588 }
1589
f2176d72
JO		 1590 /*
1591 * Always handle WMM once after association regardless
1592 * of the first value the AP uses. Setting -1 here has
1593 * that effect because the AP values is an unsigned
1594 * 4-bit value.
1595 */
1596 ifmgd->wmm_last_param_set = -1;
1597
ddf4ac53 1598 if (elems.wmm_param)
4ced3f74 1599 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1600 elems.wmm_param_len);
aa837e1d
JB		 1601 else
1602 ieee80211_set_wmm_default(sdata);
f0706e82 1603
e4da8c37
JB		 1604 local->oper_channel = wk->chan;
1605
ae5eb026 1606 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1607 (sdata->local->hw.queues >= 4) &&
ab1faead 1608 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1609 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1610 cbss->bssid, ap_ht_cap_flags,
1611 false);
ae5eb026 1612
60f8b39c
JB		 1613 /* set AID and assoc capability,
1614 * ieee80211_set_associated() will tell the driver */
1615 bss_conf->aid = aid;
1616 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1617 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1618
d524215f
FF		 1619 /*
1620 * If we're using 4-addr mode, let the AP know that we're
1621 * doing so, so that it can create the STA VLAN on its side
1622 */
1623 if (ifmgd->use_4addr)
1624 ieee80211_send_4addr_nullfunc(local, sdata);
1625
15b7b062 1626 /*
b291ba11
JB		 1627 * Start timer to probe the connection to the AP now.
1628 * Also start the timer that will detect beacon loss.
15b7b062 1629 */
b291ba11 1630 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1631 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1632
af6b6374 1633 return true;
f0706e82
JB		 1634}
1635
1636
98c8fccf
JB		 1637static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1638 struct ieee80211_mgmt *mgmt,
1639 size_t len,
1640 struct ieee80211_rx_status *rx_status,
1641 struct ieee802_11_elems *elems,
1642 bool beacon)
1643{
1644 struct ieee80211_local *local = sdata->local;
1645 int freq;
c2b13452 1646 struct ieee80211_bss *bss;
98c8fccf 1647 struct ieee80211_channel *channel;
56007a02
JB		 1648 bool need_ps = false;
1649
1650 if (sdata->u.mgd.associated) {
1651 bss = (void *)sdata->u.mgd.associated->priv;
1652 /* not previously set so we may need to recalc */
1653 need_ps = !bss->dtim_period;
1654 }
98c8fccf
JB		 1655
1656 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1657 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1658 rx_status->band);
98c8fccf
JB		 1659 else
1660 freq = rx_status->freq;
1661
1662 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1663
1664 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1665 return;
1666
98c8fccf 1667 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1668 channel, beacon);
77fdaa12
JB		 1669 if (bss)
1670 ieee80211_rx_bss_put(local, bss);
1671
1672 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1673 return;
1674
56007a02
JB		 1675 if (need_ps) {
1676 mutex_lock(&local->iflist_mtx);
1677 ieee80211_recalc_ps(local, -1);
1678 mutex_unlock(&local->iflist_mtx);
1679 }
1680
c481ec97 1681 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1682 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1683 ETH_ALEN) == 0)) {
c481ec97
S		 1684 struct ieee80211_channel_sw_ie *sw_elem =
1685 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1686 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1687 bss, rx_status->mactime);
c481ec97 1688 }
f0706e82
JB		 1689}
1690
1691
f698d856 1692static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1693 struct sk_buff *skb)
f0706e82 1694{
af6b6374 1695 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1696 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1697 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1698 size_t baselen, len = skb->len;
ae6a44e3
EK		 1699 struct ieee802_11_elems elems;
1700
15b7b062
KV		 1701 ifmgd = &sdata->u.mgd;
1702
77fdaa12
JB		 1703 ASSERT_MGD_MTX(ifmgd);
1704
47846c9b 1705 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1706 return; /* ignore ProbeResp to foreign address */
1707
ae6a44e3
EK		 1708 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1709 if (baselen > len)
1710 return;
1711
1712 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1713 &elems);
1714
98c8fccf 1715 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1716
77fdaa12 1717 if (ifmgd->associated &&
4e5ff376
FF		 1718 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1719 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1720}
1721
d91f36db
JB		 1722/*
1723 * This is the canonical list of information elements we care about,
1724 * the filter code also gives us all changes to the Microsoft OUI
1725 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1726 *
1727 * We implement beacon filtering in software since that means we can
1728 * avoid processing the frame here and in cfg80211, and userspace
1729 * will not be able to tell whether the hardware supports it or not.
1730 *
1731 * XXX: This list needs to be dynamic -- userspace needs to be able to
1732 * add items it requires. It also needs to be able to tell us to
1733 * look out for other vendor IEs.
1734 */
1735static const u64 care_about_ies =
1d4df3a5
JB		 1736 (1ULL << WLAN_EID_COUNTRY) |
1737 (1ULL << WLAN_EID_ERP_INFO) |
1738 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1739 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1740 (1ULL << WLAN_EID_HT_CAPABILITY) |
1741 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1742
f698d856 1743static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1744 struct ieee80211_mgmt *mgmt,
1745 size_t len,
1746 struct ieee80211_rx_status *rx_status)
1747{
d91f36db 1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1749 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1750 size_t baselen;
1751 struct ieee802_11_elems elems;
f698d856 1752 struct ieee80211_local *local = sdata->local;
471b3efd 1753 u32 changed = 0;
d91f36db 1754 bool erp_valid, directed_tim = false;
7a5158ef 1755 u8 erp_value = 0;
d91f36db 1756 u32 ncrc;
77fdaa12
JB		 1757 u8 *bssid;
1758
1759 ASSERT_MGD_MTX(ifmgd);
f0706e82 1760
ae6a44e3
EK		 1761 /* Process beacon from the current BSS */
1762 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1763 if (baselen > len)
1764 return;
1765
d91f36db 1766 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1767 return;
f0706e82 1768
b291ba11
JB		 1769 /*
1770 * We might have received a number of frames, among them a
1771 * disassoc frame and a beacon...
1772 */
1773 if (!ifmgd->associated)
77fdaa12
JB		 1774 return;
1775
0c1ad2ca 1776 bssid = ifmgd->associated->bssid;
77fdaa12 1777
b291ba11
JB		 1778 /*
1779 * And in theory even frames from a different AP we were just
1780 * associated to a split-second ago!
1781 */
1782 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1783 return;
1784
17e4ec14
JM		 1785 /* Track average RSSI from the Beacon frames of the current AP */
1786 ifmgd->last_beacon_signal = rx_status->signal;
1787 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1788 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1789 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1790 ifmgd->last_cqm_event_signal = 0;
391a200a 1791 ifmgd->count_beacon_signal = 1;
615f7b9b 1792 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1793 } else {
1794 ifmgd->ave_beacon_signal =
1795 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1796 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1797 ifmgd->ave_beacon_signal) / 16;
391a200a 1798 ifmgd->count_beacon_signal++;
17e4ec14 1799 }
615f7b9b
MV		 1800
1801 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1802 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1803 int sig = ifmgd->ave_beacon_signal;
1804 int last_sig = ifmgd->last_ave_beacon_signal;
1805
1806 /*
1807 * if signal crosses either of the boundaries, invoke callback
1808 * with appropriate parameters
1809 */
1810 if (sig > ifmgd->rssi_max_thold &&
1811 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1812 ifmgd->last_ave_beacon_signal = sig;
1813 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1814 } else if (sig < ifmgd->rssi_min_thold &&
1815 (last_sig >= ifmgd->rssi_max_thold ||
1816 last_sig == 0)) {
1817 ifmgd->last_ave_beacon_signal = sig;
1818 drv_rssi_callback(local, RSSI_EVENT_LOW);
1819 }
1820 }
1821
17e4ec14 1822 if (bss_conf->cqm_rssi_thold &&
391a200a 1823 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1824 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1825 int sig = ifmgd->ave_beacon_signal / 16;
1826 int last_event = ifmgd->last_cqm_event_signal;
1827 int thold = bss_conf->cqm_rssi_thold;
1828 int hyst = bss_conf->cqm_rssi_hyst;
1829 if (sig < thold &&
1830 (last_event == 0 || sig < last_event - hyst)) {
1831 ifmgd->last_cqm_event_signal = sig;
1832 ieee80211_cqm_rssi_notify(
1833 &sdata->vif,
1834 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1835 GFP_KERNEL);
1836 } else if (sig > thold &&
1837 (last_event == 0 || sig > last_event + hyst)) {
1838 ifmgd->last_cqm_event_signal = sig;
1839 ieee80211_cqm_rssi_notify(
1840 &sdata->vif,
1841 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1842 GFP_KERNEL);
1843 }
1844 }
1845
b291ba11 1846 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1847#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1848 if (net_ratelimit()) {
1849 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1850 "to a received beacon\n", sdata->name);
92778180
JM		 1851 }
1852#endif
b291ba11 1853 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1854 mutex_lock(&local->iflist_mtx);
1855 ieee80211_recalc_ps(local, -1);
1856 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1857 }
1858
b291ba11
JB		 1859 /*
1860 * Push the beacon loss detection into the future since
1861 * we are processing a beacon from the AP just now.
1862 */
d3a910a8 1863 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1864
d91f36db
JB		 1865 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1866 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1867 len - baselen, &elems,
1868 care_about_ies, ncrc);
1869
1870 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1871 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1872 ifmgd->aid);
d91f36db 1873
d8ec4433 1874 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1875 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1876 true);
d91f36db 1877
4ced3f74 1878 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1879 elems.wmm_param_len);
1880 }
fe3fa827 1881
25c9c875 1882 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1883 if (directed_tim) {
572e0012
KV		 1884 if (local->hw.conf.dynamic_ps_timeout > 0) {
1885 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1886 ieee80211_hw_config(local,
1887 IEEE80211_CONF_CHANGE_PS);
1888 ieee80211_send_nullfunc(local, sdata, 0);
1889 } else {
1890 local->pspolling = true;
1891
1892 /*
1893 * Here is assumed that the driver will be
1894 * able to send ps-poll frame and receive a
1895 * response even though power save mode is
1896 * enabled, but some drivers might require
1897 * to disable power save here. This needs
1898 * to be investigated.
1899 */
1900 ieee80211_send_pspoll(local, sdata);
1901 }
a97b77b9
VN		 1902 }
1903 }
7a5158ef 1904
d8ec4433 1905 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1906 return;
1907 ifmgd->beacon_crc = ncrc;
d8ec4433 1908 ifmgd->beacon_crc_valid = true;
30196673 1909
7a5158ef
JB		 1910 if (elems.erp_info && elems.erp_info_len >= 1) {
1911 erp_valid = true;
1912 erp_value = elems.erp_info[0];
1913 } else {
1914 erp_valid = false;
50c4afb9 1915 }
7a5158ef
JB		 1916 changed |= ieee80211_handle_bss_capability(sdata,
1917 le16_to_cpu(mgmt->u.beacon.capab_info),
1918 erp_valid, erp_value);
f0706e82 1919
d3c990fb 1920
53d6f81c 1921 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1922 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1923 struct sta_info *sta;
1924 struct ieee80211_supported_band *sband;
1925 u16 ap_ht_cap_flags;
1926
1927 rcu_read_lock();
1928
abe60632 1929 sta = sta_info_get(sdata, bssid);
77fdaa12 1930 if (WARN_ON(!sta)) {
ae5eb026
JB		 1931 rcu_read_unlock();
1932 return;
1933 }
1934
1935 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1936
1937 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1938 elems.ht_cap_elem, &sta->sta.ht_cap);
1939
1940 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1941
1942 rcu_read_unlock();
1943
1944 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 1945 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 1946 }
1947
8b19e6ca 1948 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1949 if (elems.country_elem) {
a8302de9
VT		 1950 /* TODO: IBSS also needs this */
1951 if (elems.pwr_constr_elem)
1952 ieee80211_handle_pwr_constr(sdata,
1953 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1954 elems.pwr_constr_elem,
1955 elems.pwr_constr_elem_len);
3f2355cb
LR		 1956 }
1957
471b3efd 1958 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1959}
1960
1fa57d01
JB		 1961void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1962 struct sk_buff *skb)
f0706e82 1963{
77fdaa12 1964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1965 struct ieee80211_rx_status *rx_status;
f0706e82 1966 struct ieee80211_mgmt *mgmt;
77fdaa12 1967 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1968 u16 fc;
1969
f0706e82
JB		 1970 rx_status = (struct ieee80211_rx_status *) skb->cb;
1971 mgmt = (struct ieee80211_mgmt *) skb->data;
1972 fc = le16_to_cpu(mgmt->frame_control);
1973
77fdaa12
JB		 1974 mutex_lock(&ifmgd->mtx);
1975
1976 if (ifmgd->associated &&
0c1ad2ca 1977 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1978 switch (fc & IEEE80211_FCTL_STYPE) {
1979 case IEEE80211_STYPE_BEACON:
1980 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1981 rx_status);
1982 break;
1983 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1984 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1985 break;
1986 case IEEE80211_STYPE_DEAUTH:
63f170e0 1987 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1988 break;
1989 case IEEE80211_STYPE_DISASSOC:
1990 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1991 break;
1992 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1993 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1994 case WLAN_CATEGORY_SPECTRUM_MGMT:
1995 ieee80211_sta_process_chanswitch(sdata,
1996 &mgmt->u.action.u.chan_switch.sw_elem,
1997 (void *)ifmgd->associated->priv,
1998 rx_status->mactime);
1999 break;
2000 }
77fdaa12
JB		 2001 }
2002 mutex_unlock(&ifmgd->mtx);
2003
2004 switch (rma) {
2005 case RX_MGMT_NONE:
2006 /* no action */
2007 break;
2008 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2009 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2010 break;
2011 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2012 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2013 break;
2014 default:
2015 WARN(1, "unexpected: %d", rma);
2016 }
36b3a628 2017 return;
77fdaa12
JB		 2018 }
2019
77fdaa12
JB		 2020 mutex_unlock(&ifmgd->mtx);
2021
63f170e0 2022 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2023 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2024 struct ieee80211_local *local = sdata->local;
2025 struct ieee80211_work *wk;
2026
a1699b75 2027 mutex_lock(&local->mtx);
b054b747
JB		 2028 list_for_each_entry(wk, &local->work_list, list) {
2029 if (wk->sdata != sdata)
2030 continue;
2031
e5b900d2
JB		 2032 if (wk->type != IEEE80211_WORK_ASSOC &&
2033 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2034 continue;
2035
2036 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2037 continue;
2038 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2039 continue;
2040
2041 /*
2042 * Printing the message only here means we can't
2043 * spuriously print it, but it also means that it
2044 * won't be printed when the frame comes in before
2045 * we even tried to associate or in similar cases.
2046 *
2047 * Ultimately, I suspect cfg80211 should print the
2048 * messages instead.
2049 */
2050 printk(KERN_DEBUG
2051 "%s: deauthenticated from %pM (Reason: %u)\n",
2052 sdata->name, mgmt->bssid,
2053 le16_to_cpu(mgmt->u.deauth.reason_code));
2054
2055 list_del_rcu(&wk->list);
2056 free_work(wk);
2057 break;
2058 }
a1699b75 2059 mutex_unlock(&local->mtx);
f0706e82 2060
ce470613 2061 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2062 }
f0706e82
JB		 2063}
2064
9c6bd790 2065static void ieee80211_sta_timer(unsigned long data)
f0706e82 2066{
60f8b39c
JB		 2067 struct ieee80211_sub_if_data *sdata =
2068 (struct ieee80211_sub_if_data *) data;
46900298 2069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2070 struct ieee80211_local *local = sdata->local;
f0706e82 2071
5bb644a0
JB		 2072 if (local->quiescing) {
2073 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2074 return;
2075 }
2076
64592c8f 2077 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2078}
2079
04ac3c0e 2080static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2081 u8 *bssid, u8 reason)
04ac3c0e
FF		 2082{
2083 struct ieee80211_local *local = sdata->local;
2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2085
2086 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2087 IEEE80211_STA_BEACON_POLL);
2088
2089 ieee80211_set_disassoc(sdata, true, true);
2090 mutex_unlock(&ifmgd->mtx);
2091 mutex_lock(&local->mtx);
2092 ieee80211_recalc_idle(local);
2093 mutex_unlock(&local->mtx);
2094 /*
2095 * must be outside lock due to cfg80211,
2096 * but that's not a problem.
2097 */
2098 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2099 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2100 NULL, true);
2101 mutex_lock(&ifmgd->mtx);
2102}
2103
1fa57d01 2104void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2105{
9c6bd790 2106 struct ieee80211_local *local = sdata->local;
1fa57d01 2107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2108
77fdaa12
JB		 2109 /* then process the rest of the work */
2110 mutex_lock(&ifmgd->mtx);
2111
b291ba11
JB		 2112 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2113 IEEE80211_STA_CONNECTION_POLL) &&
2114 ifmgd->associated) {
a43abf29 2115 u8 bssid[ETH_ALEN];
72a8a3ed 2116 int max_tries;
a43abf29 2117
0c1ad2ca 2118 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2119
72a8a3ed 2120 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2121 max_tries = max_nullfunc_tries;
72a8a3ed 2122 else
180205bd 2123 max_tries = max_probe_tries;
72a8a3ed 2124
4e5ff376
FF		 2125 /* ACK received for nullfunc probing frame */
2126 if (!ifmgd->probe_send_count)
2127 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2128 else if (ifmgd->nullfunc_failed) {
2129 if (ifmgd->probe_send_count < max_tries) {
2130#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2131 wiphy_debug(local->hw.wiphy,
2132 "%s: No ack for nullfunc frame to"
bfc31df3 2133 " AP %pM, try %d/%i\n",
04ac3c0e 2134 sdata->name, bssid,
bfc31df3 2135 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2136#endif
2137 ieee80211_mgd_probe_ap_send(sdata);
2138 } else {
2139#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2140 wiphy_debug(local->hw.wiphy,
2141 "%s: No ack for nullfunc frame to"
2142 " AP %pM, disconnecting.\n",
c658e5db 2143 sdata->name, bssid);
04ac3c0e 2144#endif
95acac61
JB		 2145 ieee80211_sta_connection_lost(sdata, bssid,
2146 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2147 }
2148 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2149 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2150 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2151#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2152 wiphy_debug(local->hw.wiphy,
2153 "%s: Failed to send nullfunc to AP %pM"
2154 " after %dms, disconnecting.\n",
2155 sdata->name,
180205bd 2156 bssid, probe_wait_ms);
04ac3c0e 2157#endif
95acac61
JB		 2158 ieee80211_sta_connection_lost(sdata, bssid,
2159 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2160 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2161#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2162 wiphy_debug(local->hw.wiphy,
2163 "%s: No probe response from AP %pM"
bfc31df3 2164 " after %dms, try %d/%i\n",
b38afa87 2165 sdata->name,
180205bd 2166 bssid, probe_wait_ms,
bfc31df3 2167 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2168#endif
2169 ieee80211_mgd_probe_ap_send(sdata);
2170 } else {
b291ba11
JB		 2171 /*
2172 * We actually lost the connection ... or did we?
2173 * Let's make sure!
2174 */
b38afa87
BG		 2175 wiphy_debug(local->hw.wiphy,
2176 "%s: No probe response from AP %pM"
2177 " after %dms, disconnecting.\n",
2178 sdata->name,
180205bd 2179 bssid, probe_wait_ms);
04ac3c0e 2180
95acac61
JB		 2181 ieee80211_sta_connection_lost(sdata, bssid,
2182 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2183 }
2184 }
2185
77fdaa12 2186 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2187}
2188
b291ba11
JB		 2189static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2190{
2191 struct ieee80211_sub_if_data *sdata =
2192 (struct ieee80211_sub_if_data *) data;
2193 struct ieee80211_local *local = sdata->local;
2194
2195 if (local->quiescing)
2196 return;
2197
1e4dcd01
JO		 2198 ieee80211_queue_work(&sdata->local->hw,
2199 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2200}
2201
2202static void ieee80211_sta_conn_mon_timer(unsigned long data)
2203{
2204 struct ieee80211_sub_if_data *sdata =
2205 (struct ieee80211_sub_if_data *) data;
2206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2207 struct ieee80211_local *local = sdata->local;
2208
2209 if (local->quiescing)
2210 return;
2211
42935eca 2212 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2213}
2214
2215static void ieee80211_sta_monitor_work(struct work_struct *work)
2216{
2217 struct ieee80211_sub_if_data *sdata =
2218 container_of(work, struct ieee80211_sub_if_data,
2219 u.mgd.monitor_work);
2220
2221 ieee80211_mgd_probe_ap(sdata, false);
2222}
2223
9c6bd790
JB		 2224static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2225{
ad935687 2226 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2227 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2228 IEEE80211_STA_CONNECTION_POLL);
ad935687 2229
b291ba11 2230 /* let's probe the connection once */
42935eca 2231 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2232 &sdata->u.mgd.monitor_work);
2233 /* and do all the other regular work too */
64592c8f 2234 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2235 }
9c6bd790 2236}
f0706e82 2237
5bb644a0
JB		 2238#ifdef CONFIG_PM
2239void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2240{
2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2242
2243 /*
2244 * we need to use atomic bitops for the running bits
2245 * only because both timers might fire at the same
2246 * time -- the code here is properly synchronised.
2247 */
2248
d1f5b7a3
JB		 2249 cancel_work_sync(&ifmgd->request_smps_work);
2250
1e4dcd01 2251 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2252 if (del_timer_sync(&ifmgd->timer))
2253 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2254
2255 cancel_work_sync(&ifmgd->chswitch_work);
2256 if (del_timer_sync(&ifmgd->chswitch_timer))
2257 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2258
2259 cancel_work_sync(&ifmgd->monitor_work);
2260 /* these will just be re-established on connection */
2261 del_timer_sync(&ifmgd->conn_mon_timer);
2262 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2263}
2264
2265void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2266{
2267 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2268
676b58c2
RM		 2269 if (!ifmgd->associated)
2270 return;
2271
95acac61
JB		 2272 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2273 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2274 mutex_lock(&ifmgd->mtx);
2275 if (ifmgd->associated) {
2276#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2277 wiphy_debug(sdata->local->hw.wiphy,
2278 "%s: driver requested disconnect after resume.\n",
2279 sdata->name);
2280#endif
2281 ieee80211_sta_connection_lost(sdata,
2282 ifmgd->associated->bssid,
2283 WLAN_REASON_UNSPECIFIED);
2284 mutex_unlock(&ifmgd->mtx);
2285 return;
2286 }
2287 mutex_unlock(&ifmgd->mtx);
2288 }
2289
5bb644a0
JB		 2290 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2291 add_timer(&ifmgd->timer);
2292 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2293 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2294 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2295 ieee80211_restart_sta_timer(sdata);
a6af1d84 2296 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2297}
2298#endif
2299
9c6bd790
JB		 2300/* interface setup */
2301void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2302{
46900298 2303 struct ieee80211_if_managed *ifmgd;
988c0f72 2304
46900298 2305 ifmgd = &sdata->u.mgd;
b291ba11 2306 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2307 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2308 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2309 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2310 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2311 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2312 (unsigned long) sdata);
b291ba11
JB		 2313 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2314 (unsigned long) sdata);
2315 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2316 (unsigned long) sdata);
46900298 2317 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2318 (unsigned long) sdata);
9c6bd790 2319
ab1faead 2320 ifmgd->flags = 0;
bbbdff9e 2321
77fdaa12 2322 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2323
2324 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2325 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2326 else
2327 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2328}
2329
77fdaa12
JB		 2330/* scan finished notification */
2331void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2332{
77fdaa12 2333 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2334
77fdaa12
JB		 2335 /* Restart STA timers */
2336 rcu_read_lock();
2337 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2338 ieee80211_restart_sta_timer(sdata);
2339 rcu_read_unlock();
2340}
60f8b39c 2341
77fdaa12
JB		 2342int ieee80211_max_network_latency(struct notifier_block *nb,
2343 unsigned long data, void *dummy)
2344{
2345 s32 latency_usec = (s32) data;
2346 struct ieee80211_local *local =
2347 container_of(nb, struct ieee80211_local,
2348 network_latency_notifier);
1fa6f4af 2349
77fdaa12
JB		 2350 mutex_lock(&local->iflist_mtx);
2351 ieee80211_recalc_ps(local, latency_usec);
2352 mutex_unlock(&local->iflist_mtx);
dfe67012 2353
77fdaa12 2354 return 0;
9c6bd790
JB		 2355}
2356
77fdaa12 2357/* config hooks */
af6b6374
JB		 2358static enum work_done_result
2359ieee80211_probe_auth_done(struct ieee80211_work *wk,
2360 struct sk_buff *skb)
2361{
b2abb6e2
JB		 2362 struct ieee80211_local *local = wk->sdata->local;
2363
af6b6374
JB		 2364 if (!skb) {
2365 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2366 goto destroy;
af6b6374
JB		 2367 }
2368
2369 if (wk->type == IEEE80211_WORK_AUTH) {
2370 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2371 goto destroy;
af6b6374
JB		 2372 }
2373
2374 mutex_lock(&wk->sdata->u.mgd.mtx);
2375 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2376 mutex_unlock(&wk->sdata->u.mgd.mtx);
2377
2378 wk->type = IEEE80211_WORK_AUTH;
2379 wk->probe_auth.tries = 0;
2380 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2381 destroy:
2382 if (wk->probe_auth.synced)
2383 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2384 IEEE80211_TX_SYNC_AUTH);
2385
2386 return WORK_DONE_DESTROY;
af6b6374
JB		 2387}
2388
77fdaa12
JB		 2389int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2390 struct cfg80211_auth_request *req)
9c6bd790 2391{
77fdaa12 2392 const u8 *ssid;
f679f65d 2393 struct ieee80211_work *wk;
77fdaa12 2394 u16 auth_alg;
9c6bd790 2395
d5cdfacb
JM		 2396 if (req->local_state_change)
2397 return 0; /* no need to update mac80211 state */
2398
77fdaa12
JB		 2399 switch (req->auth_type) {
2400 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2401 auth_alg = WLAN_AUTH_OPEN;
2402 break;
2403 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2404 if (IS_ERR(sdata->local->wep_tx_tfm))
2405 return -EOPNOTSUPP;
77fdaa12
JB		 2406 auth_alg = WLAN_AUTH_SHARED_KEY;
2407 break;
2408 case NL80211_AUTHTYPE_FT:
2409 auth_alg = WLAN_AUTH_FT;
2410 break;
2411 case NL80211_AUTHTYPE_NETWORK_EAP:
2412 auth_alg = WLAN_AUTH_LEAP;
2413 break;
2414 default:
2415 return -EOPNOTSUPP;
60f8b39c 2416 }
77fdaa12
JB		 2417
2418 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2419 if (!wk)
9c6bd790 2420 return -ENOMEM;
77fdaa12 2421
5e124bd5 2422 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2423
2424 if (req->ie && req->ie_len) {
2425 memcpy(wk->ie, req->ie, req->ie_len);
2426 wk->ie_len = req->ie_len;
9c6bd790 2427 }
77fdaa12 2428
fffd0934 2429 if (req->key && req->key_len) {
af6b6374
JB		 2430 wk->probe_auth.key_len = req->key_len;
2431 wk->probe_auth.key_idx = req->key_idx;
2432 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2433 }
2434
77fdaa12 2435 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2436 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2437 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2438
af6b6374
JB		 2439 wk->probe_auth.algorithm = auth_alg;
2440 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2441
070bb547
JB		 2442 /* if we already have a probe, don't probe again */
2443 if (req->bss->proberesp_ies)
2444 wk->type = IEEE80211_WORK_AUTH;
2445 else
2446 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2447 wk->chan = req->bss->channel;
4d51e149 2448 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2449 wk->sdata = sdata;
2450 wk->done = ieee80211_probe_auth_done;
77fdaa12 2451
af6b6374 2452 ieee80211_add_work(wk);
9c6bd790 2453 return 0;
60f8b39c
JB		 2454}
2455
2a33bee2
GE		 2456/* create and insert a dummy station entry */
2457static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2458 u8 *bssid) {
2459 struct sta_info *sta;
2460 int err;
2461
2462 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2463 if (!sta)
2a33bee2 2464 return -ENOMEM;
2a33bee2
GE		 2465
2466 sta->dummy = true;
2467
2468 err = sta_info_insert(sta);
2469 sta = NULL;
2470 if (err) {
2471 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2472 " the AP (error %d)\n", sdata->name, err);
2473 return err;
2474 }
2475
2476 return 0;
2477}
2478
af6b6374
JB		 2479static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2480 struct sk_buff *skb)
2481{
b2abb6e2 2482 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2483 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2484 struct ieee80211_rx_status *rx_status;
2485 struct ieee802_11_elems elems;
2a33bee2 2486 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2487 u16 status;
2488
2489 if (!skb) {
2a33bee2 2490 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2491 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2492 goto destroy;
af6b6374
JB		 2493 }
2494
e5b900d2
JB		 2495 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2496 mutex_lock(&wk->sdata->u.mgd.mtx);
2497 rx_status = (void *) skb->cb;
2498 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2499 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2500 &elems, true);
2501 mutex_unlock(&wk->sdata->u.mgd.mtx);
2502
2503 wk->type = IEEE80211_WORK_ASSOC;
2504 /* not really done yet */
2505 return WORK_DONE_REQUEUE;
2506 }
2507
af6b6374
JB		 2508 mgmt = (void *)skb->data;
2509 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2510
2511 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2512 if (wk->assoc.synced)
2513 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2514 IEEE80211_TX_SYNC_ASSOC);
2515
af6b6374
JB		 2516 mutex_lock(&wk->sdata->u.mgd.mtx);
2517 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2518 mutex_unlock(&wk->sdata->u.mgd.mtx);
2519 /* oops -- internal error -- send timeout for now */
2a33bee2 2520 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2521 cfg80211_send_assoc_timeout(wk->sdata->dev,
2522 wk->filter_ta);
2523 return WORK_DONE_DESTROY;
2524 }
68542962
JO		 2525
2526 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2527 } else {
2528 /* assoc failed - destroy the dummy station entry */
2529 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2530 }
2531
2532 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2533 destroy:
2534 if (wk->assoc.synced)
2535 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2536 IEEE80211_TX_SYNC_ASSOC);
2537
af6b6374
JB		 2538 return WORK_DONE_DESTROY;
2539}
2540
77fdaa12
JB		 2541int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2542 struct cfg80211_assoc_request *req)
f0706e82 2543{
77fdaa12 2544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2545 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2546 struct ieee80211_work *wk;
63f170e0 2547 const u8 *ssid;
2a33bee2 2548 int i, err;
f0706e82 2549
77fdaa12 2550 mutex_lock(&ifmgd->mtx);
af6b6374 2551 if (ifmgd->associated) {
9c87ba67
JM		 2552 if (!req->prev_bssid ||
2553 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2554 ETH_ALEN)) {
2555 /*
2556 * We are already associated and the request was not a
2557 * reassociation request from the current BSS, so
2558 * reject it.
2559 */
2560 mutex_unlock(&ifmgd->mtx);
2561 return -EALREADY;
2562 }
2563
2564 /* Trying to reassociate - clear previous association state */
53f73c09 2565 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2566 }
2567 mutex_unlock(&ifmgd->mtx);
77fdaa12 2568
63f170e0 2569 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2570 if (!wk)
2571 return -ENOMEM;
77fdaa12 2572
2a33bee2
GE		 2573 /*
2574 * create a dummy station info entry in order
2575 * to start accepting incoming EAPOL packets from the station
2576 */
2577 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2578 if (err) {
2579 kfree(wk);
2580 return err;
2581 }
2582
77fdaa12 2583 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2584 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2585
d8ec4433
JO		 2586 ifmgd->beacon_crc_valid = false;
2587
77fdaa12
JB		 2588 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2589 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2590 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2591 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2592 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2593
77fdaa12
JB		 2594
2595 if (req->ie && req->ie_len) {
2596 memcpy(wk->ie, req->ie, req->ie_len);
2597 wk->ie_len = req->ie_len;
2598 } else
2599 wk->ie_len = 0;
2600
0c1ad2ca 2601 wk->assoc.bss = req->bss;
f679f65d 2602
af6b6374 2603 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2604
af6b6374
JB		 2605 /* new association always uses requested smps mode */
2606 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2607 if (ifmgd->powersave)
2608 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2609 else
2610 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2611 } else
2612 ifmgd->ap_smps = ifmgd->req_smps;
2613
2614 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2615 /*
2616 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2617 * We still associate in non-HT mode (11a/b/g) if any one of these
2618 * ciphers is configured as pairwise.
2619 * We can set this to true for non-11n hardware, that'll be checked
2620 * separately along with the peer capabilities.
2621 */
af6b6374 2622 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2623 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2624 wk->assoc.wmm_used = bss->wmm_used;
2625 wk->assoc.supp_rates = bss->supp_rates;
2626 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2627 wk->assoc.ht_information_ie =
2628 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2629
ab13315a
KV		 2630 if (bss->wmm_used && bss->uapsd_supported &&
2631 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2632 wk->assoc.uapsd_used = true;
2633 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2634 } else {
2635 wk->assoc.uapsd_used = false;
2636 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2637 }
2638
63f170e0 2639 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2640 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2641 wk->assoc.ssid_len = ssid[1];
63f170e0 2642
77fdaa12 2643 if (req->prev_bssid)
f679f65d 2644 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2645
f679f65d 2646 wk->chan = req->bss->channel;
4d51e149 2647 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2648 wk->sdata = sdata;
2649 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2650 if (!bss->dtim_period &&
2651 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2652 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2653 else
2654 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2655
2656 if (req->use_mfp) {
2657 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2658 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2659 } else {
2660 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2661 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2662 }
2663
2664 if (req->crypto.control_port)
2665 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2666 else
2667 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2668
a621fa4d
JB		 2669 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2670 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2671
af6b6374
JB		 2672 ieee80211_add_work(wk);
2673 return 0;
f0706e82
JB		 2674}
2675
77fdaa12 2676int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2677 struct cfg80211_deauth_request *req,
2678 void *cookie)
f0706e82 2679{
af6b6374 2680 struct ieee80211_local *local = sdata->local;
46900298 2681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2682 struct ieee80211_work *wk;
05e48e8e
JM		 2683 u8 bssid[ETH_ALEN];
2684 bool assoc_bss = false;
f0706e82 2685
77fdaa12
JB		 2686 mutex_lock(&ifmgd->mtx);
2687
05e48e8e 2688 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2689 if (ifmgd->associated == req->bss) {
53f73c09 2690 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2691 mutex_unlock(&ifmgd->mtx);
05e48e8e 2692 assoc_bss = true;
af6b6374
JB		 2693 } else {
2694 bool not_auth_yet = false;
f0706e82 2695
a58ce43f 2696 mutex_unlock(&ifmgd->mtx);
a58ce43f 2697
a1699b75 2698 mutex_lock(&local->mtx);
af6b6374 2699 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2700 if (wk->sdata != sdata)
af6b6374 2701 continue;
29165e4c
JB		 2702
2703 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2704 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2705 wk->type != IEEE80211_WORK_ASSOC &&
2706 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2707 continue;
2708
af6b6374
JB		 2709 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2710 continue;
29165e4c
JB		 2711
2712 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2713 list_del_rcu(&wk->list);
af6b6374
JB		 2714 free_work(wk);
2715 break;
2716 }
a1699b75 2717 mutex_unlock(&local->mtx);
af6b6374
JB		 2718
2719 /*
2720 * If somebody requests authentication and we haven't
2721 * sent out an auth frame yet there's no need to send
2722 * out a deauth frame either. If the state was PROBE,
2723 * then this is the case. If it's AUTH we have sent a
2724 * frame, and if it's IDLE we have completed the auth
2725 * process already.
2726 */
2727 if (not_auth_yet) {
2728 __cfg80211_auth_canceled(sdata->dev, bssid);
2729 return 0;
2730 }
2731 }
77fdaa12 2732
0ff71613 2733 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2734 sdata->name, bssid, req->reason_code);
0ff71613 2735
d5cdfacb
JM		 2736 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2737 req->reason_code, cookie,
2738 !req->local_state_change);
05e48e8e 2739 if (assoc_bss)
07ba55d7 2740 sta_info_flush(sdata->local, sdata);
f0706e82 2741
7da7cc1d 2742 mutex_lock(&sdata->local->mtx);
bc83b681 2743 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2744 mutex_unlock(&sdata->local->mtx);
bc83b681 2745
f0706e82
JB		 2746 return 0;
2747}
84363e6e 2748
77fdaa12 2749int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2750 struct cfg80211_disassoc_request *req,
2751 void *cookie)
9c6bd790 2752{
77fdaa12 2753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2754 u8 bssid[ETH_ALEN];
9c6bd790 2755
77fdaa12 2756 mutex_lock(&ifmgd->mtx);
10f644a4 2757
8d8b261a
JB		 2758 /*
2759 * cfg80211 should catch this ... but it's racy since
2760 * we can receive a disassoc frame, process it, hand it
2761 * to cfg80211 while that's in a locked section already
2762 * trying to tell us that the user wants to disconnect.
2763 */
0c1ad2ca 2764 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2765 mutex_unlock(&ifmgd->mtx);
2766 return -ENOLINK;
2767 }
2768
0ff71613 2769 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2770 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2771
e69e95db 2772 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2773 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2774
2775 mutex_unlock(&ifmgd->mtx);
10f644a4 2776
77fdaa12 2777 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2778 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2779 cookie, !req->local_state_change);
07ba55d7 2780 sta_info_flush(sdata->local, sdata);
bc83b681 2781
7da7cc1d 2782 mutex_lock(&sdata->local->mtx);
bc83b681 2783 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2784 mutex_unlock(&sdata->local->mtx);
bc83b681 2785
10f644a4
JB		 2786 return 0;
2787}
026331c4 2788
a97c13c3
JO		 2789void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2790 enum nl80211_cqm_rssi_threshold_event rssi_event,
2791 gfp_t gfp)
2792{
2793 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2794
b5878a2d
JB		 2795 trace_api_cqm_rssi_notify(sdata, rssi_event);
2796
a97c13c3
JO		 2797 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2798}
2799EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2800
2801unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2802{
2803 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2804 return sdata->dev->operstate;
2805}
2806EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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