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iwlwifi: allow pci_enable_msi fail
[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>
e8db0be1 20#include <linux/pm_qos.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;
b6f35301 351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 352
d8cd189e
KV		 353 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
354 if (!skb)
965bedad 355 return;
965bedad 356
d8cd189e 357 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 358 if (powersave)
d8cd189e 359 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 360
62ae67be 361 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 362 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
363 IEEE80211_STA_CONNECTION_POLL))
364 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
365
62ae67be 366 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 367}
368
d524215f
FF		 369static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
370 struct ieee80211_sub_if_data *sdata)
371{
372 struct sk_buff *skb;
373 struct ieee80211_hdr *nullfunc;
374 __le16 fc;
375
376 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
377 return;
378
379 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 380 if (!skb)
d524215f 381 return;
d15b8459 382
d524215f
FF		 383 skb_reserve(skb, local->hw.extra_tx_headroom);
384
385 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
386 memset(nullfunc, 0, 30);
387 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
388 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
389 nullfunc->frame_control = fc;
390 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
391 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
392 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
393 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
394
395 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
396 ieee80211_tx_skb(sdata, skb);
397}
398
cc32abd4
JB		 399/* spectrum management related things */
400static void ieee80211_chswitch_work(struct work_struct *work)
401{
402 struct ieee80211_sub_if_data *sdata =
403 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
405
9607e6b6 406 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 407 return;
408
77fdaa12
JB		 409 mutex_lock(&ifmgd->mtx);
410 if (!ifmgd->associated)
411 goto out;
cc32abd4
JB		 412
413 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 414 if (!sdata->local->ops->channel_switch) {
415 /* call "hw_config" only if doing sw channel switch */
416 ieee80211_hw_config(sdata->local,
417 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 418 } else {
419 /* update the device channel directly */
420 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 421 }
77fdaa12 422
cc32abd4 423 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 424 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 425
cc32abd4
JB		 426 ieee80211_wake_queues_by_reason(&sdata->local->hw,
427 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 428 out:
429 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
430 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 431}
432
5ce6e438
JB		 433void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
434{
435 struct ieee80211_sub_if_data *sdata;
436 struct ieee80211_if_managed *ifmgd;
437
438 sdata = vif_to_sdata(vif);
439 ifmgd = &sdata->u.mgd;
440
441 trace_api_chswitch_done(sdata, success);
442 if (!success) {
443 /*
444 * If the channel switch was not successful, stay
445 * around on the old channel. We currently lack
446 * good handling of this situation, possibly we
447 * should just drop the association.
448 */
449 sdata->local->csa_channel = sdata->local->oper_channel;
450 }
451
452 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
453}
454EXPORT_SYMBOL(ieee80211_chswitch_done);
455
cc32abd4
JB		 456static void ieee80211_chswitch_timer(unsigned long data)
457{
458 struct ieee80211_sub_if_data *sdata =
459 (struct ieee80211_sub_if_data *) data;
460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
461
5bb644a0
JB		 462 if (sdata->local->quiescing) {
463 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
464 return;
465 }
466
42935eca 467 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 468}
469
470void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
471 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 472 struct ieee80211_bss *bss,
473 u64 timestamp)
cc32abd4 474{
0c1ad2ca
JB		 475 struct cfg80211_bss *cbss =
476 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 477 struct ieee80211_channel *new_ch;
478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 479 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
480 cbss->channel->band);
cc32abd4 481
77fdaa12
JB		 482 ASSERT_MGD_MTX(ifmgd);
483
484 if (!ifmgd->associated)
cc32abd4
JB		 485 return;
486
fbe9c429 487 if (sdata->local->scanning)
cc32abd4
JB		 488 return;
489
490 /* Disregard subsequent beacons if we are already running a timer
491 processing a CSA */
492
493 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
494 return;
495
496 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
497 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
498 return;
499
500 sdata->local->csa_channel = new_ch;
501
5ce6e438
JB		 502 if (sdata->local->ops->channel_switch) {
503 /* use driver's channel switch callback */
504 struct ieee80211_channel_switch ch_switch;
505 memset(&ch_switch, 0, sizeof(ch_switch));
506 ch_switch.timestamp = timestamp;
507 if (sw_elem->mode) {
508 ch_switch.block_tx = true;
509 ieee80211_stop_queues_by_reason(&sdata->local->hw,
510 IEEE80211_QUEUE_STOP_REASON_CSA);
511 }
512 ch_switch.channel = new_ch;
513 ch_switch.count = sw_elem->count;
514 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
515 drv_channel_switch(sdata->local, &ch_switch);
516 return;
517 }
518
519 /* channel switch handled in software */
cc32abd4 520 if (sw_elem->count <= 1) {
42935eca 521 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 522 } else {
9feaddc7
WYG		 523 if (sw_elem->mode)
524 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 525 IEEE80211_QUEUE_STOP_REASON_CSA);
526 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
527 mod_timer(&ifmgd->chswitch_timer,
528 jiffies +
529 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 530 cbss->beacon_interval));
cc32abd4
JB		 531 }
532}
533
534static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
535 u16 capab_info, u8 *pwr_constr_elem,
536 u8 pwr_constr_elem_len)
537{
538 struct ieee80211_conf *conf = &sdata->local->hw.conf;
539
540 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
541 return;
542
543 /* Power constraint IE length should be 1 octet */
544 if (pwr_constr_elem_len != 1)
545 return;
546
547 if ((*pwr_constr_elem <= conf->channel->max_power) &&
548 (*pwr_constr_elem != sdata->local->power_constr_level)) {
549 sdata->local->power_constr_level = *pwr_constr_elem;
550 ieee80211_hw_config(sdata->local, 0);
551 }
552}
553
f90754c1
JO		 554void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
555{
556 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
557 struct ieee80211_local *local = sdata->local;
558 struct ieee80211_conf *conf = &local->hw.conf;
559
560 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
561 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
562 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
563
564 local->disable_dynamic_ps = false;
565 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
566}
567EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
568
569void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
570{
571 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
572 struct ieee80211_local *local = sdata->local;
573 struct ieee80211_conf *conf = &local->hw.conf;
574
575 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
576 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
577 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
578
579 local->disable_dynamic_ps = true;
580 conf->dynamic_ps_timeout = 0;
581 del_timer_sync(&local->dynamic_ps_timer);
582 ieee80211_queue_work(&local->hw,
583 &local->dynamic_ps_enable_work);
584}
585EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
586
965bedad
JB		 587/* powersave */
588static void ieee80211_enable_ps(struct ieee80211_local *local,
589 struct ieee80211_sub_if_data *sdata)
590{
591 struct ieee80211_conf *conf = &local->hw.conf;
592
d5edaedc
JB		 593 /*
594 * If we are scanning right now then the parameters will
595 * take effect when scan finishes.
596 */
fbe9c429 597 if (local->scanning)
d5edaedc
JB		 598 return;
599
965bedad
JB		 600 if (conf->dynamic_ps_timeout > 0 &&
601 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
602 mod_timer(&local->dynamic_ps_timer, jiffies +
603 msecs_to_jiffies(conf->dynamic_ps_timeout));
604 } else {
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 607
2a13052f
JO		 608 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
609 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
610 return;
611
612 conf->flags |= IEEE80211_CONF_PS;
613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 614 }
615}
616
617static void ieee80211_change_ps(struct ieee80211_local *local)
618{
619 struct ieee80211_conf *conf = &local->hw.conf;
620
621 if (local->ps_sdata) {
965bedad
JB		 622 ieee80211_enable_ps(local, local->ps_sdata);
623 } else if (conf->flags & IEEE80211_CONF_PS) {
624 conf->flags &= ~IEEE80211_CONF_PS;
625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
626 del_timer_sync(&local->dynamic_ps_timer);
627 cancel_work_sync(&local->dynamic_ps_enable_work);
628 }
629}
630
808118cb
JY		 631static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
632{
633 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
634 struct sta_info *sta = NULL;
c2c98fde 635 bool authorized = false;
808118cb
JY		 636
637 if (!mgd->powersave)
638 return false;
639
640 if (!mgd->associated)
641 return false;
642
643 if (!mgd->associated->beacon_ies)
644 return false;
645
646 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
647 IEEE80211_STA_CONNECTION_POLL))
648 return false;
649
650 rcu_read_lock();
651 sta = sta_info_get(sdata, mgd->bssid);
652 if (sta)
c2c98fde 653 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 654 rcu_read_unlock();
655
c2c98fde 656 return authorized;
808118cb
JY		 657}
658
965bedad 659/* need to hold RTNL or interface lock */
10f644a4 660void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 661{
662 struct ieee80211_sub_if_data *sdata, *found = NULL;
663 int count = 0;
195e294d 664 int timeout;
965bedad
JB		 665
666 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
667 local->ps_sdata = NULL;
668 return;
669 }
670
af6b6374
JB		 671 if (!list_empty(&local->work_list)) {
672 local->ps_sdata = NULL;
673 goto change;
674 }
675
965bedad 676 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 677 if (!ieee80211_sdata_running(sdata))
965bedad 678 continue;
8c7914de
RM		 679 if (sdata->vif.type == NL80211_IFTYPE_AP) {
680 /* If an AP vif is found, then disable PS
681 * by setting the count to zero thereby setting
682 * ps_sdata to NULL.
683 */
684 count = 0;
685 break;
686 }
965bedad
JB		 687 if (sdata->vif.type != NL80211_IFTYPE_STATION)
688 continue;
689 found = sdata;
690 count++;
691 }
692
808118cb 693 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 694 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 695 s32 beaconint_us;
696
697 if (latency < 0)
ed77134b 698 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 699
700 beaconint_us = ieee80211_tu_to_usec(
701 found->vif.bss_conf.beacon_int);
702
ff616381 703 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 704 if (timeout < 0) {
705 /*
ff616381
JO		 706 * Go to full PSM if the user configures a very low
707 * latency requirement.
0ab82b04
EP		 708 * The 2000 second value is there for compatibility
709 * until the PM_QOS_NETWORK_LATENCY is configured
710 * with real values.
195e294d 711 */
0ab82b04
EP		 712 if (latency > (1900 * USEC_PER_MSEC) &&
713 latency != (2000 * USEC_PER_SEC))
195e294d 714 timeout = 0;
ff616381
JO		 715 else
716 timeout = 100;
195e294d 717 }
f90754c1
JO		 718 local->dynamic_ps_user_timeout = timeout;
719 if (!local->disable_dynamic_ps)
720 conf->dynamic_ps_timeout =
721 local->dynamic_ps_user_timeout;
195e294d 722
04fe2037 723 if (beaconint_us > latency) {
10f644a4 724 local->ps_sdata = NULL;
04fe2037 725 } else {
56007a02 726 struct ieee80211_bss *bss;
04fe2037 727 int maxslp = 1;
56007a02 728 u8 dtimper;
04fe2037 729
56007a02
JB		 730 bss = (void *)found->u.mgd.associated->priv;
731 dtimper = bss->dtim_period;
732
733 /* If the TIM IE is invalid, pretend the value is 1 */
734 if (!dtimper)
735 dtimper = 1;
736 else if (dtimper > 1)
04fe2037
JB		 737 maxslp = min_t(int, dtimper,
738 latency / beaconint_us);
739
9ccebe61 740 local->hw.conf.max_sleep_period = maxslp;
56007a02 741 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 742 local->ps_sdata = found;
04fe2037 743 }
10f644a4 744 } else {
965bedad 745 local->ps_sdata = NULL;
10f644a4 746 }
965bedad 747
af6b6374 748 change:
965bedad
JB		 749 ieee80211_change_ps(local);
750}
751
752void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
753{
754 struct ieee80211_local *local =
755 container_of(work, struct ieee80211_local,
756 dynamic_ps_disable_work);
757
758 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
759 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
760 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
761 }
762
763 ieee80211_wake_queues_by_reason(&local->hw,
764 IEEE80211_QUEUE_STOP_REASON_PS);
765}
766
767void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
768{
769 struct ieee80211_local *local =
770 container_of(work, struct ieee80211_local,
771 dynamic_ps_enable_work);
772 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 773 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 774 unsigned long flags;
775 int q;
965bedad
JB		 776
777 /* can only happen when PS was just disabled anyway */
778 if (!sdata)
779 return;
780
5e34069c
CL		 781 ifmgd = &sdata->u.mgd;
782
965bedad
JB		 783 if (local->hw.conf.flags & IEEE80211_CONF_PS)
784 return;
785
77b7023a
AN		 786 if (!local->disable_dynamic_ps &&
787 local->hw.conf.dynamic_ps_timeout > 0) {
788 /* don't enter PS if TX frames are pending */
789 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 790 mod_timer(&local->dynamic_ps_timer, jiffies +
791 msecs_to_jiffies(
792 local->hw.conf.dynamic_ps_timeout));
793 return;
794 }
77b7023a
AN		 795
796 /*
797 * transmission can be stopped by others which leads to
798 * dynamic_ps_timer expiry. Postpone the ps timer if it
799 * is not the actual idle state.
800 */
801 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
802 for (q = 0; q < local->hw.queues; q++) {
803 if (local->queue_stop_reasons[q]) {
804 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
805 flags);
806 mod_timer(&local->dynamic_ps_timer, jiffies +
807 msecs_to_jiffies(
808 local->hw.conf.dynamic_ps_timeout));
809 return;
810 }
811 }
812 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 813 }
1ddc2867 814
375177bf 815 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 816 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
817 netif_tx_stop_all_queues(sdata->dev);
965bedad 818
e8306f98
VN		 819 if (drv_tx_frames_pending(local))
820 mod_timer(&local->dynamic_ps_timer, jiffies +
821 msecs_to_jiffies(
822 local->hw.conf.dynamic_ps_timeout));
823 else {
824 ieee80211_send_nullfunc(local, sdata, 1);
825 /* Flush to get the tx status of nullfunc frame */
826 drv_flush(local, false);
827 }
f3e85b9e
VN		 828 }
829
2a13052f
JO		 830 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
831 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 832 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
833 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
834 local->hw.conf.flags |= IEEE80211_CONF_PS;
835 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
836 }
f3e85b9e 837
77b7023a
AN		 838 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
839 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 840}
841
842void ieee80211_dynamic_ps_timer(unsigned long data)
843{
844 struct ieee80211_local *local = (void *) data;
845
78f1a8b7 846 if (local->quiescing || local->suspended)
5bb644a0
JB		 847 return;
848
42935eca 849 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 850}
851
60f8b39c 852/* MLME */
f698d856 853static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 854 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 855 u8 *wmm_param, size_t wmm_param_len)
856{
f0706e82 857 struct ieee80211_tx_queue_params params;
4ced3f74 858 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 859 size_t left;
860 int count;
ab13315a 861 u8 *pos, uapsd_queues = 0;
f0706e82 862
e1b3ec1a
SG		 863 if (!local->ops->conf_tx)
864 return;
865
af6b6374 866 if (local->hw.queues < 4)
3434fbd3
JB		 867 return;
868
869 if (!wmm_param)
870 return;
871
f0706e82
JB		 872 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
873 return;
ab13315a
KV		 874
875 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 876 uapsd_queues = local->uapsd_queues;
ab13315a 877
f0706e82 878 count = wmm_param[6] & 0x0f;
46900298 879 if (count == ifmgd->wmm_last_param_set)
f0706e82 880 return;
46900298 881 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 882
883 pos = wmm_param + 8;
884 left = wmm_param_len - 8;
885
886 memset(&params, 0, sizeof(params));
887
f0706e82
JB		 888 local->wmm_acm = 0;
889 for (; left >= 4; left -= 4, pos += 4) {
890 int aci = (pos[0] >> 5) & 0x03;
891 int acm = (pos[0] >> 4) & 0x01;
ab13315a 892 bool uapsd = false;
f0706e82
JB		 893 int queue;
894
895 switch (aci) {
0eeb59fe 896 case 1: /* AC_BK */
e100bb64 897 queue = 3;
988c0f72 898 if (acm)
0eeb59fe 899 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 900 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
901 uapsd = true;
f0706e82 902 break;
0eeb59fe 903 case 2: /* AC_VI */
e100bb64 904 queue = 1;
988c0f72 905 if (acm)
0eeb59fe 906 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 907 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
908 uapsd = true;
f0706e82 909 break;
0eeb59fe 910 case 3: /* AC_VO */
e100bb64 911 queue = 0;
988c0f72 912 if (acm)
0eeb59fe 913 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 914 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
915 uapsd = true;
f0706e82 916 break;
0eeb59fe 917 case 0: /* AC_BE */
f0706e82 918 default:
e100bb64 919 queue = 2;
988c0f72 920 if (acm)
0eeb59fe 921 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 922 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
923 uapsd = true;
f0706e82
JB		 924 break;
925 }
926
927 params.aifs = pos[0] & 0x0f;
928 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
929 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 930 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 931 params.uapsd = uapsd;
932
f4ea83dd 933#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 934 wiphy_debug(local->hw.wiphy,
935 "WMM queue=%d aci=%d acm=%d aifs=%d "
936 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
937 queue, aci, acm,
938 params.aifs, params.cw_min, params.cw_max,
939 params.txop, params.uapsd);
3330d7be 940#endif
f6f3def3
EP		 941 sdata->tx_conf[queue] = params;
942 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 943 wiphy_debug(local->hw.wiphy,
944 "failed to set TX queue parameters for queue %d\n",
945 queue);
f0706e82 946 }
e1b3ec1a
SG		 947
948 /* enable WMM or activate new settings */
4ced3f74
JB		 949 sdata->vif.bss_conf.qos = true;
950 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 951}
952
7a5158ef
JB		 953static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
954 u16 capab, bool erp_valid, u8 erp)
5628221c 955{
bda3933a 956 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 957 u32 changed = 0;
7a5158ef
JB		 958 bool use_protection;
959 bool use_short_preamble;
960 bool use_short_slot;
961
962 if (erp_valid) {
963 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
964 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
965 } else {
966 use_protection = false;
967 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
968 }
969
970 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 971 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
972 use_short_slot = true;
5628221c 973
471b3efd 974 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 975 bss_conf->use_cts_prot = use_protection;
976 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 977 }
7e9ed188 978
d43c7b37 979 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 980 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 981 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 982 }
d9430a32 983
7a5158ef 984 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 985 bss_conf->use_short_slot = use_short_slot;
986 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 987 }
988
989 return changed;
990}
991
f698d856 992static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 993 struct cfg80211_bss *cbss,
ae5eb026 994 u32 bss_info_changed)
f0706e82 995{
0c1ad2ca 996 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 997 struct ieee80211_local *local = sdata->local;
68542962 998 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 999
ae5eb026 1000 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1001 /* set timing information */
68542962
JO		 1002 bss_conf->beacon_int = cbss->beacon_interval;
1003 bss_conf->timestamp = cbss->tsf;
5628221c 1004
77fdaa12
JB		 1005 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1006 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1007 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1008
7ccc8bd7
FF		 1009 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1010 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1011
0c1ad2ca
JB		 1012 sdata->u.mgd.associated = cbss;
1013 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1014
17e4ec14
JM		 1015 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1016
b291ba11
JB		 1017 /* just to be sure */
1018 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1019 IEEE80211_STA_BEACON_POLL);
1020
9ac19a90 1021 ieee80211_led_assoc(local, 1);
9306102e 1022
e5b900d2
JB		 1023 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1024 bss_conf->dtim_period = bss->dtim_period;
1025 else
1026 bss_conf->dtim_period = 0;
1027
68542962 1028 bss_conf->assoc = 1;
96dd22ac
JB		 1029 /*
1030 * For now just always ask the driver to update the basic rateset
1031 * when we have associated, we aren't checking whether it actually
1032 * changed or not.
1033 */
ae5eb026 1034 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1035
1036 /* And the BSSID changed - we're associated now */
1037 bss_info_changed |= BSS_CHANGED_BSSID;
1038
a97c13c3
JO		 1039 /* Tell the driver to monitor connection quality (if supported) */
1040 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1041 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1042 bss_info_changed |= BSS_CHANGED_CQM;
1043
68542962
JO		 1044 /* Enable ARP filtering */
1045 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1046 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1047 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1048 }
1049
ae5eb026 1050 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1051
056508dc
JB		 1052 mutex_lock(&local->iflist_mtx);
1053 ieee80211_recalc_ps(local, -1);
025e6be2 1054 ieee80211_recalc_smps(local);
056508dc 1055 mutex_unlock(&local->iflist_mtx);
e0cb686f 1056
8a5b33f5 1057 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1058 netif_carrier_on(sdata->dev);
f0706e82
JB		 1059}
1060
e69e95db 1061static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1062 bool remove_sta, bool tx)
aa458d17 1063{
46900298 1064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1065 struct ieee80211_local *local = sdata->local;
1066 struct sta_info *sta;
e0cb686f 1067 u32 changed = 0, config_changed = 0;
b291ba11 1068 u8 bssid[ETH_ALEN];
aa458d17 1069
77fdaa12
JB		 1070 ASSERT_MGD_MTX(ifmgd);
1071
b291ba11
JB		 1072 if (WARN_ON(!ifmgd->associated))
1073 return;
1074
0c1ad2ca 1075 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1076
77fdaa12
JB		 1077 ifmgd->associated = NULL;
1078 memset(ifmgd->bssid, 0, ETH_ALEN);
1079
1080 /*
1081 * we need to commit the associated = NULL change because the
1082 * scan code uses that to determine whether this iface should
1083 * go to/wake up from powersave or not -- and could otherwise
1084 * wake the queues erroneously.
1085 */
1086 smp_mb();
1087
1088 /*
1089 * Thus, we can only afterwards stop the queues -- to account
1090 * for the case where another CPU is finishing a scan at this
1091 * time -- we don't want the scan code to enable queues.
1092 */
aa458d17 1093
8a5b33f5 1094 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1095 netif_carrier_off(sdata->dev);
1096
2a419056 1097 mutex_lock(&local->sta_mtx);
abe60632 1098 sta = sta_info_get(sdata, bssid);
4cad6c7c 1099 if (sta) {
c2c98fde 1100 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1101 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1102 }
2a419056 1103 mutex_unlock(&local->sta_mtx);
aa458d17 1104
f5e5bf25
TW		 1105 changed |= ieee80211_reset_erp_info(sdata);
1106
f5e5bf25 1107 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1108 changed |= BSS_CHANGED_ASSOC;
1109 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1110
aa837e1d
JB		 1111 ieee80211_set_wmm_default(sdata);
1112
4797938c 1113 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1114 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1115
413ad50a
JB		 1116 /* on the next assoc, re-program HT parameters */
1117 sdata->ht_opmode_valid = false;
1118
a8302de9
VT		 1119 local->power_constr_level = 0;
1120
520eb820
KV		 1121 del_timer_sync(&local->dynamic_ps_timer);
1122 cancel_work_sync(&local->dynamic_ps_enable_work);
1123
e0cb686f
KV		 1124 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1125 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1126 config_changed |= IEEE80211_CONF_CHANGE_PS;
1127 }
a331400b 1128 local->ps_sdata = NULL;
ae5eb026 1129
e0cb686f 1130 ieee80211_hw_config(local, config_changed);
9cef8737 1131
68542962
JO		 1132 /* Disable ARP filtering */
1133 if (sdata->vif.bss_conf.arp_filter_enabled) {
1134 sdata->vif.bss_conf.arp_filter_enabled = false;
1135 changed |= BSS_CHANGED_ARP_FILTER;
1136 }
1137
0aaffa9b
JB		 1138 /* The BSSID (not really interesting) and HT changed */
1139 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1140 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1141
07ba55d7 1142 /* remove AP and TDLS peers */
e69e95db 1143 if (remove_sta)
07ba55d7 1144 sta_info_flush(local, sdata);
b9dcf712
JB		 1145
1146 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1147 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1148 del_timer_sync(&sdata->u.mgd.timer);
1149 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1150}
f0706e82 1151
3cf335d5
KV		 1152void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_hdr *hdr)
1154{
1155 /*
1156 * We can postpone the mgd.timer whenever receiving unicast frames
1157 * from AP because we know that the connection is working both ways
1158 * at that time. But multicast frames (and hence also beacons) must
1159 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1160 * data idle periods for sending the periodic probe request to the
1161 * AP we're connected to.
3cf335d5 1162 */
b291ba11
JB		 1163 if (is_multicast_ether_addr(hdr->addr1))
1164 return;
1165
be099e82 1166 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1167}
f0706e82 1168
4e5ff376
FF		 1169static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1170{
1171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1172
1173 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1174 IEEE80211_STA_CONNECTION_POLL)))
1175 return;
1176
1177 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1178 IEEE80211_STA_BEACON_POLL);
1179 mutex_lock(&sdata->local->iflist_mtx);
1180 ieee80211_recalc_ps(sdata->local, -1);
1181 mutex_unlock(&sdata->local->iflist_mtx);
1182
1183 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1184 return;
1185
1186 /*
1187 * We've received a probe response, but are not sure whether
1188 * we have or will be receiving any beacons or data, so let's
1189 * schedule the timers again, just in case.
1190 */
1191 ieee80211_sta_reset_beacon_monitor(sdata);
1192
1193 mod_timer(&ifmgd->conn_mon_timer,
1194 round_jiffies_up(jiffies +
1195 IEEE80211_CONNECTION_IDLE_TIME));
1196}
1197
1198void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1199 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1200{
75706d0e 1201 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1202 return;
1203
04ac3c0e
FF		 1204 if (ack)
1205 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1206
1207 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1208 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1209 if (ack)
1210 sdata->u.mgd.probe_send_count = 0;
1211 else
1212 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1213 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1214 }
1215}
1216
a43abf29
ML		 1217static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1218{
1219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1220 const u8 *ssid;
f01a067d 1221 u8 *dst = ifmgd->associated->bssid;
180205bd 1222 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1223
1224 /*
1225 * Try sending broadcast probe requests for the last three
1226 * probe requests after the first ones failed since some
1227 * buggy APs only support broadcast probe requests.
1228 */
1229 if (ifmgd->probe_send_count >= unicast_limit)
1230 dst = NULL;
a43abf29 1231
4e5ff376
FF		 1232 /*
1233 * When the hardware reports an accurate Tx ACK status, it's
1234 * better to send a nullfunc frame instead of a probe request,
1235 * as it will kick us off the AP quickly if we aren't associated
1236 * anymore. The timeout will be reset if the frame is ACKed by
1237 * the AP.
1238 */
04ac3c0e
FF		 1239 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1240 ifmgd->nullfunc_failed = false;
4e5ff376 1241 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1242 } else {
4e5ff376 1243 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1244 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1245 (u32) -1, true, false);
4e5ff376 1246 }
a43abf29
ML		 1247
1248 ifmgd->probe_send_count++;
180205bd 1249 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1250 run_again(ifmgd, ifmgd->probe_timeout);
1251}
1252
b291ba11
JB		 1253static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1254 bool beacon)
04de8381 1255{
04de8381 1256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1257 bool already = false;
34bfc411 1258
9607e6b6 1259 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1260 return;
1261
91a3bd76
LR		 1262 if (sdata->local->scanning)
1263 return;
1264
b8bc4b0a
JB		 1265 if (sdata->local->tmp_channel)
1266 return;
1267
77fdaa12
JB		 1268 mutex_lock(&ifmgd->mtx);
1269
1270 if (!ifmgd->associated)
1271 goto out;
1272
a860402d 1273#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1274 if (beacon && net_ratelimit())
1275 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1276 "- sending probe request\n", sdata->name);
a860402d 1277#endif
04de8381 1278
b291ba11
JB		 1279 /*
1280 * The driver/our work has already reported this event or the
1281 * connection monitoring has kicked in and we have already sent
1282 * a probe request. Or maybe the AP died and the driver keeps
1283 * reporting until we disassociate...
1284 *
1285 * In either case we have to ignore the current call to this
1286 * function (except for setting the correct probe reason bit)
1287 * because otherwise we would reset the timer every time and
1288 * never check whether we received a probe response!
1289 */
1290 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1291 IEEE80211_STA_CONNECTION_POLL))
1292 already = true;
1293
1294 if (beacon)
1295 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1296 else
1297 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1298
1299 if (already)
1300 goto out;
1301
4e751843
JB		 1302 mutex_lock(&sdata->local->iflist_mtx);
1303 ieee80211_recalc_ps(sdata->local, -1);
1304 mutex_unlock(&sdata->local->iflist_mtx);
1305
a43abf29
ML		 1306 ifmgd->probe_send_count = 0;
1307 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1308 out:
1309 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1310}
1311
a619a4c0
JO		 1312struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1313 struct ieee80211_vif *vif)
1314{
1315 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1317 struct sk_buff *skb;
1318 const u8 *ssid;
1319
1320 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1321 return NULL;
1322
1323 ASSERT_MGD_MTX(ifmgd);
1324
1325 if (!ifmgd->associated)
1326 return NULL;
1327
1328 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1329 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1330 (u32) -1, ssid + 2, ssid[1],
1331 NULL, 0, true);
a619a4c0
JO		 1332
1333 return skb;
1334}
1335EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1336
1e4dcd01
JO		 1337static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1338{
1339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1340 struct ieee80211_local *local = sdata->local;
1341 u8 bssid[ETH_ALEN];
1342
1343 mutex_lock(&ifmgd->mtx);
1344 if (!ifmgd->associated) {
1345 mutex_unlock(&ifmgd->mtx);
1346 return;
1347 }
1348
1349 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1350
180205bd
BG		 1351 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1352 sdata->name, bssid);
1e4dcd01 1353
53f73c09 1354 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1355 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1356
1357 mutex_lock(&local->mtx);
1358 ieee80211_recalc_idle(local);
1359 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1360 /*
1361 * must be outside lock due to cfg80211,
1362 * but that's not a problem.
1363 */
1364 ieee80211_send_deauth_disassoc(sdata, bssid,
1365 IEEE80211_STYPE_DEAUTH,
1366 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1367 NULL, true);
1e4dcd01
JO		 1368}
1369
1370void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1371{
1372 struct ieee80211_sub_if_data *sdata =
1373 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1374 u.mgd.beacon_connection_loss_work);
b291ba11 1375
1e4dcd01
JO		 1376 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1377 __ieee80211_connection_loss(sdata);
1378 else
1379 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1380}
1381
04de8381
KV		 1382void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1383{
1384 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1385 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1386
b5878a2d
JB		 1387 trace_api_beacon_loss(sdata);
1388
1e4dcd01
JO		 1389 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1390 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1391}
1392EXPORT_SYMBOL(ieee80211_beacon_loss);
1393
1e4dcd01
JO		 1394void ieee80211_connection_loss(struct ieee80211_vif *vif)
1395{
1396 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1397 struct ieee80211_hw *hw = &sdata->local->hw;
1398
b5878a2d
JB		 1399 trace_api_connection_loss(sdata);
1400
1e4dcd01
JO		 1401 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1402 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1403}
1404EXPORT_SYMBOL(ieee80211_connection_loss);
1405
1406
77fdaa12
JB		 1407static enum rx_mgmt_action __must_check
1408ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1409 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1410{
46900298 1411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1412 const u8 *bssid = NULL;
f0706e82
JB		 1413 u16 reason_code;
1414
f4ea83dd 1415 if (len < 24 + 2)
77fdaa12 1416 return RX_MGMT_NONE;
f0706e82 1417
77fdaa12
JB		 1418 ASSERT_MGD_MTX(ifmgd);
1419
0c1ad2ca 1420 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1421
1422 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1423
77fdaa12 1424 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1425 sdata->name, bssid, reason_code);
77fdaa12 1426
53f73c09 1427 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1428 mutex_lock(&sdata->local->mtx);
63f170e0 1429 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1430 mutex_unlock(&sdata->local->mtx);
f0706e82 1431
77fdaa12 1432 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1433}
1434
1435
77fdaa12
JB		 1436static enum rx_mgmt_action __must_check
1437ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1438 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1439{
46900298 1440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1441 u16 reason_code;
1442
f4ea83dd 1443 if (len < 24 + 2)
77fdaa12 1444 return RX_MGMT_NONE;
f0706e82 1445
77fdaa12
JB		 1446 ASSERT_MGD_MTX(ifmgd);
1447
1448 if (WARN_ON(!ifmgd->associated))
1449 return RX_MGMT_NONE;
1450
0c1ad2ca 1451 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1452 return RX_MGMT_NONE;
f0706e82
JB		 1453
1454 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1455
0ff71613 1456 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1457 sdata->name, mgmt->sa, reason_code);
f0706e82 1458
53f73c09 1459 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1460 mutex_lock(&sdata->local->mtx);
bc83b681 1461 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1462 mutex_unlock(&sdata->local->mtx);
77fdaa12 1463 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1464}
1465
1466
af6b6374
JB		 1467static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1468 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1469{
af6b6374 1470 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1472 struct ieee80211_local *local = sdata->local;
8318d78a 1473 struct ieee80211_supported_band *sband;
f0706e82 1474 struct sta_info *sta;
0c1ad2ca 1475 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1476 u8 *pos;
881d948c 1477 u32 rates, basic_rates;
af6b6374 1478 u16 capab_info, aid;
f0706e82 1479 struct ieee802_11_elems elems;
bda3933a 1480 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1481 u32 changed = 0;
5d1ec85f
JB		 1482 int i, j, err;
1483 bool have_higher_than_11mbit = false;
ae5eb026 1484 u16 ap_ht_cap_flags;
f0706e82 1485
af6b6374 1486 /* AssocResp and ReassocResp have identical structure */
f0706e82 1487
f0706e82 1488 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1489 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1490
1dd84aa2
JB		 1491 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1492 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1493 "set\n", sdata->name, aid);
1dd84aa2
JB		 1494 aid &= ~(BIT(15) | BIT(14));
1495
af6b6374
JB		 1496 pos = mgmt->u.assoc_resp.variable;
1497 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1498
f0706e82
JB		 1499 if (!elems.supp_rates) {
1500 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1501 sdata->name);
af6b6374 1502 return false;
f0706e82
JB		 1503 }
1504
46900298 1505 ifmgd->aid = aid;
f0706e82 1506
2a33bee2
GE		 1507 mutex_lock(&sdata->local->sta_mtx);
1508 /*
1509 * station info was already allocated and inserted before
1510 * the association and should be available to us
1511 */
1512 sta = sta_info_get_rx(sdata, cbss->bssid);
1513 if (WARN_ON(!sta)) {
1514 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1515 return false;
77fdaa12 1516 }
05e5e883 1517
c2c98fde
JB		 1518 set_sta_flag(sta, WLAN_STA_AUTH);
1519 set_sta_flag(sta, WLAN_STA_ASSOC);
1520 set_sta_flag(sta, WLAN_STA_ASSOC_AP);
5d1ec85f 1521 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
c2c98fde 1522 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
5d1ec85f 1523
60f8b39c
JB		 1524 rates = 0;
1525 basic_rates = 0;
e7480bbb 1526 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1527
60f8b39c
JB		 1528 for (i = 0; i < elems.supp_rates_len; i++) {
1529 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1530 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1531
60f8b39c
JB		 1532 if (rate > 110)
1533 have_higher_than_11mbit = true;
1534
1535 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1536 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1537 rates |= BIT(j);
d61272cb
TW		 1538 if (is_basic)
1539 basic_rates |= BIT(j);
1540 break;
1541 }
f709fc69 1542 }
f709fc69
LCC		 1543 }
1544
60f8b39c
JB		 1545 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1546 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1547 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1548
60f8b39c
JB		 1549 if (rate > 110)
1550 have_higher_than_11mbit = true;
f0706e82 1551
60f8b39c 1552 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1553 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1554 rates |= BIT(j);
d61272cb
TW		 1555 if (is_basic)
1556 basic_rates |= BIT(j);
1557 break;
1558 }
60f8b39c 1559 }
1ebebea8 1560 }
f0706e82 1561
e7480bbb 1562 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1563 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1564
1565 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1566 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1567 have_higher_than_11mbit)
1568 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1569 else
1570 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1571
ab1faead 1572 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1573 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1574 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1575
1576 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1577
4b7679a5 1578 rate_control_rate_init(sta);
f0706e82 1579
46900298 1580 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 1581 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 1582
ddf4ac53 1583 if (elems.wmm_param)
c2c98fde 1584 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 1585
2a33bee2
GE		 1586 /* sta_info_reinsert will also unlock the mutex lock */
1587 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1588 sta = NULL;
1589 if (err) {
1590 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1591 " the AP (error %d)\n", sdata->name, err);
90be561b 1592 return false;
ddf4ac53
JB		 1593 }
1594
f2176d72
JO		 1595 /*
1596 * Always handle WMM once after association regardless
1597 * of the first value the AP uses. Setting -1 here has
1598 * that effect because the AP values is an unsigned
1599 * 4-bit value.
1600 */
1601 ifmgd->wmm_last_param_set = -1;
1602
ddf4ac53 1603 if (elems.wmm_param)
4ced3f74 1604 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1605 elems.wmm_param_len);
aa837e1d
JB		 1606 else
1607 ieee80211_set_wmm_default(sdata);
f0706e82 1608
e4da8c37
JB		 1609 local->oper_channel = wk->chan;
1610
ae5eb026 1611 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1612 (sdata->local->hw.queues >= 4) &&
ab1faead 1613 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1614 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1615 cbss->bssid, ap_ht_cap_flags,
1616 false);
ae5eb026 1617
60f8b39c
JB		 1618 /* set AID and assoc capability,
1619 * ieee80211_set_associated() will tell the driver */
1620 bss_conf->aid = aid;
1621 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1622 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1623
d524215f
FF		 1624 /*
1625 * If we're using 4-addr mode, let the AP know that we're
1626 * doing so, so that it can create the STA VLAN on its side
1627 */
1628 if (ifmgd->use_4addr)
1629 ieee80211_send_4addr_nullfunc(local, sdata);
1630
15b7b062 1631 /*
b291ba11
JB		 1632 * Start timer to probe the connection to the AP now.
1633 * Also start the timer that will detect beacon loss.
15b7b062 1634 */
b291ba11 1635 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1636 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1637
af6b6374 1638 return true;
f0706e82
JB		 1639}
1640
1641
98c8fccf
JB		 1642static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1643 struct ieee80211_mgmt *mgmt,
1644 size_t len,
1645 struct ieee80211_rx_status *rx_status,
1646 struct ieee802_11_elems *elems,
1647 bool beacon)
1648{
1649 struct ieee80211_local *local = sdata->local;
1650 int freq;
c2b13452 1651 struct ieee80211_bss *bss;
98c8fccf 1652 struct ieee80211_channel *channel;
56007a02
JB		 1653 bool need_ps = false;
1654
1655 if (sdata->u.mgd.associated) {
1656 bss = (void *)sdata->u.mgd.associated->priv;
1657 /* not previously set so we may need to recalc */
1658 need_ps = !bss->dtim_period;
1659 }
98c8fccf
JB		 1660
1661 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1662 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1663 rx_status->band);
98c8fccf
JB		 1664 else
1665 freq = rx_status->freq;
1666
1667 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1668
1669 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1670 return;
1671
98c8fccf 1672 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1673 channel, beacon);
77fdaa12
JB		 1674 if (bss)
1675 ieee80211_rx_bss_put(local, bss);
1676
1677 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1678 return;
1679
56007a02
JB		 1680 if (need_ps) {
1681 mutex_lock(&local->iflist_mtx);
1682 ieee80211_recalc_ps(local, -1);
1683 mutex_unlock(&local->iflist_mtx);
1684 }
1685
c481ec97 1686 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1687 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1688 ETH_ALEN) == 0)) {
c481ec97
S		 1689 struct ieee80211_channel_sw_ie *sw_elem =
1690 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1691 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1692 bss, rx_status->mactime);
c481ec97 1693 }
f0706e82
JB		 1694}
1695
1696
f698d856 1697static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1698 struct sk_buff *skb)
f0706e82 1699{
af6b6374 1700 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1701 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1702 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1703 size_t baselen, len = skb->len;
ae6a44e3
EK		 1704 struct ieee802_11_elems elems;
1705
15b7b062
KV		 1706 ifmgd = &sdata->u.mgd;
1707
77fdaa12
JB		 1708 ASSERT_MGD_MTX(ifmgd);
1709
47846c9b 1710 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1711 return; /* ignore ProbeResp to foreign address */
1712
ae6a44e3
EK		 1713 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1714 if (baselen > len)
1715 return;
1716
1717 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1718 &elems);
1719
98c8fccf 1720 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1721
77fdaa12 1722 if (ifmgd->associated &&
4e5ff376
FF		 1723 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1724 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1725}
1726
d91f36db
JB		 1727/*
1728 * This is the canonical list of information elements we care about,
1729 * the filter code also gives us all changes to the Microsoft OUI
1730 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1731 *
1732 * We implement beacon filtering in software since that means we can
1733 * avoid processing the frame here and in cfg80211, and userspace
1734 * will not be able to tell whether the hardware supports it or not.
1735 *
1736 * XXX: This list needs to be dynamic -- userspace needs to be able to
1737 * add items it requires. It also needs to be able to tell us to
1738 * look out for other vendor IEs.
1739 */
1740static const u64 care_about_ies =
1d4df3a5
JB		 1741 (1ULL << WLAN_EID_COUNTRY) |
1742 (1ULL << WLAN_EID_ERP_INFO) |
1743 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1744 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1745 (1ULL << WLAN_EID_HT_CAPABILITY) |
1746 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1747
f698d856 1748static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1749 struct ieee80211_mgmt *mgmt,
1750 size_t len,
1751 struct ieee80211_rx_status *rx_status)
1752{
d91f36db 1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1754 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1755 size_t baselen;
1756 struct ieee802_11_elems elems;
f698d856 1757 struct ieee80211_local *local = sdata->local;
471b3efd 1758 u32 changed = 0;
d91f36db 1759 bool erp_valid, directed_tim = false;
7a5158ef 1760 u8 erp_value = 0;
d91f36db 1761 u32 ncrc;
77fdaa12
JB		 1762 u8 *bssid;
1763
1764 ASSERT_MGD_MTX(ifmgd);
f0706e82 1765
ae6a44e3
EK		 1766 /* Process beacon from the current BSS */
1767 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1768 if (baselen > len)
1769 return;
1770
d91f36db 1771 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1772 return;
f0706e82 1773
b291ba11
JB		 1774 /*
1775 * We might have received a number of frames, among them a
1776 * disassoc frame and a beacon...
1777 */
1778 if (!ifmgd->associated)
77fdaa12
JB		 1779 return;
1780
0c1ad2ca 1781 bssid = ifmgd->associated->bssid;
77fdaa12 1782
b291ba11
JB		 1783 /*
1784 * And in theory even frames from a different AP we were just
1785 * associated to a split-second ago!
1786 */
1787 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1788 return;
1789
17e4ec14
JM		 1790 /* Track average RSSI from the Beacon frames of the current AP */
1791 ifmgd->last_beacon_signal = rx_status->signal;
1792 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1793 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1794 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1795 ifmgd->last_cqm_event_signal = 0;
391a200a 1796 ifmgd->count_beacon_signal = 1;
615f7b9b 1797 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1798 } else {
1799 ifmgd->ave_beacon_signal =
1800 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1801 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1802 ifmgd->ave_beacon_signal) / 16;
391a200a 1803 ifmgd->count_beacon_signal++;
17e4ec14 1804 }
615f7b9b
MV		 1805
1806 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1807 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1808 int sig = ifmgd->ave_beacon_signal;
1809 int last_sig = ifmgd->last_ave_beacon_signal;
1810
1811 /*
1812 * if signal crosses either of the boundaries, invoke callback
1813 * with appropriate parameters
1814 */
1815 if (sig > ifmgd->rssi_max_thold &&
1816 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1817 ifmgd->last_ave_beacon_signal = sig;
1818 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1819 } else if (sig < ifmgd->rssi_min_thold &&
1820 (last_sig >= ifmgd->rssi_max_thold ||
1821 last_sig == 0)) {
1822 ifmgd->last_ave_beacon_signal = sig;
1823 drv_rssi_callback(local, RSSI_EVENT_LOW);
1824 }
1825 }
1826
17e4ec14 1827 if (bss_conf->cqm_rssi_thold &&
391a200a 1828 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1829 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1830 int sig = ifmgd->ave_beacon_signal / 16;
1831 int last_event = ifmgd->last_cqm_event_signal;
1832 int thold = bss_conf->cqm_rssi_thold;
1833 int hyst = bss_conf->cqm_rssi_hyst;
1834 if (sig < thold &&
1835 (last_event == 0 || sig < last_event - hyst)) {
1836 ifmgd->last_cqm_event_signal = sig;
1837 ieee80211_cqm_rssi_notify(
1838 &sdata->vif,
1839 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1840 GFP_KERNEL);
1841 } else if (sig > thold &&
1842 (last_event == 0 || sig > last_event + hyst)) {
1843 ifmgd->last_cqm_event_signal = sig;
1844 ieee80211_cqm_rssi_notify(
1845 &sdata->vif,
1846 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1847 GFP_KERNEL);
1848 }
1849 }
1850
b291ba11 1851 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1852#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1853 if (net_ratelimit()) {
1854 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1855 "to a received beacon\n", sdata->name);
92778180
JM		 1856 }
1857#endif
b291ba11 1858 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1859 mutex_lock(&local->iflist_mtx);
1860 ieee80211_recalc_ps(local, -1);
1861 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1862 }
1863
b291ba11
JB		 1864 /*
1865 * Push the beacon loss detection into the future since
1866 * we are processing a beacon from the AP just now.
1867 */
d3a910a8 1868 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1869
d91f36db
JB		 1870 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1871 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1872 len - baselen, &elems,
1873 care_about_ies, ncrc);
1874
1875 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1876 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1877 ifmgd->aid);
d91f36db 1878
d8ec4433 1879 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1880 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1881 true);
d91f36db 1882
4ced3f74 1883 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1884 elems.wmm_param_len);
1885 }
fe3fa827 1886
25c9c875 1887 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1888 if (directed_tim) {
572e0012
KV		 1889 if (local->hw.conf.dynamic_ps_timeout > 0) {
1890 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1891 ieee80211_hw_config(local,
1892 IEEE80211_CONF_CHANGE_PS);
1893 ieee80211_send_nullfunc(local, sdata, 0);
1894 } else {
1895 local->pspolling = true;
1896
1897 /*
1898 * Here is assumed that the driver will be
1899 * able to send ps-poll frame and receive a
1900 * response even though power save mode is
1901 * enabled, but some drivers might require
1902 * to disable power save here. This needs
1903 * to be investigated.
1904 */
1905 ieee80211_send_pspoll(local, sdata);
1906 }
a97b77b9
VN		 1907 }
1908 }
7a5158ef 1909
d8ec4433 1910 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1911 return;
1912 ifmgd->beacon_crc = ncrc;
d8ec4433 1913 ifmgd->beacon_crc_valid = true;
30196673 1914
7a5158ef
JB		 1915 if (elems.erp_info && elems.erp_info_len >= 1) {
1916 erp_valid = true;
1917 erp_value = elems.erp_info[0];
1918 } else {
1919 erp_valid = false;
50c4afb9 1920 }
7a5158ef
JB		 1921 changed |= ieee80211_handle_bss_capability(sdata,
1922 le16_to_cpu(mgmt->u.beacon.capab_info),
1923 erp_valid, erp_value);
f0706e82 1924
d3c990fb 1925
53d6f81c 1926 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1927 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1928 struct sta_info *sta;
1929 struct ieee80211_supported_band *sband;
1930 u16 ap_ht_cap_flags;
1931
1932 rcu_read_lock();
1933
abe60632 1934 sta = sta_info_get(sdata, bssid);
77fdaa12 1935 if (WARN_ON(!sta)) {
ae5eb026
JB		 1936 rcu_read_unlock();
1937 return;
1938 }
1939
1940 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1941
1942 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1943 elems.ht_cap_elem, &sta->sta.ht_cap);
1944
1945 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1946
1947 rcu_read_unlock();
1948
1949 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 1950 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 1951 }
1952
8b19e6ca 1953 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1954 if (elems.country_elem) {
a8302de9
VT		 1955 /* TODO: IBSS also needs this */
1956 if (elems.pwr_constr_elem)
1957 ieee80211_handle_pwr_constr(sdata,
1958 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1959 elems.pwr_constr_elem,
1960 elems.pwr_constr_elem_len);
3f2355cb
LR		 1961 }
1962
471b3efd 1963 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1964}
1965
1fa57d01
JB		 1966void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1967 struct sk_buff *skb)
f0706e82 1968{
77fdaa12 1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1970 struct ieee80211_rx_status *rx_status;
f0706e82 1971 struct ieee80211_mgmt *mgmt;
77fdaa12 1972 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1973 u16 fc;
1974
f0706e82
JB		 1975 rx_status = (struct ieee80211_rx_status *) skb->cb;
1976 mgmt = (struct ieee80211_mgmt *) skb->data;
1977 fc = le16_to_cpu(mgmt->frame_control);
1978
77fdaa12
JB		 1979 mutex_lock(&ifmgd->mtx);
1980
1981 if (ifmgd->associated &&
0c1ad2ca 1982 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1983 switch (fc & IEEE80211_FCTL_STYPE) {
1984 case IEEE80211_STYPE_BEACON:
1985 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1986 rx_status);
1987 break;
1988 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1989 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1990 break;
1991 case IEEE80211_STYPE_DEAUTH:
63f170e0 1992 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1993 break;
1994 case IEEE80211_STYPE_DISASSOC:
1995 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1996 break;
1997 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1998 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1999 case WLAN_CATEGORY_SPECTRUM_MGMT:
2000 ieee80211_sta_process_chanswitch(sdata,
2001 &mgmt->u.action.u.chan_switch.sw_elem,
2002 (void *)ifmgd->associated->priv,
2003 rx_status->mactime);
2004 break;
2005 }
77fdaa12
JB		 2006 }
2007 mutex_unlock(&ifmgd->mtx);
2008
2009 switch (rma) {
2010 case RX_MGMT_NONE:
2011 /* no action */
2012 break;
2013 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2014 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2015 break;
2016 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2017 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2018 break;
2019 default:
2020 WARN(1, "unexpected: %d", rma);
2021 }
36b3a628 2022 return;
77fdaa12
JB		 2023 }
2024
77fdaa12
JB		 2025 mutex_unlock(&ifmgd->mtx);
2026
63f170e0 2027 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2028 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2029 struct ieee80211_local *local = sdata->local;
2030 struct ieee80211_work *wk;
2031
a1699b75 2032 mutex_lock(&local->mtx);
b054b747
JB		 2033 list_for_each_entry(wk, &local->work_list, list) {
2034 if (wk->sdata != sdata)
2035 continue;
2036
e5b900d2
JB		 2037 if (wk->type != IEEE80211_WORK_ASSOC &&
2038 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2039 continue;
2040
2041 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2042 continue;
2043 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2044 continue;
2045
2046 /*
2047 * Printing the message only here means we can't
2048 * spuriously print it, but it also means that it
2049 * won't be printed when the frame comes in before
2050 * we even tried to associate or in similar cases.
2051 *
2052 * Ultimately, I suspect cfg80211 should print the
2053 * messages instead.
2054 */
2055 printk(KERN_DEBUG
2056 "%s: deauthenticated from %pM (Reason: %u)\n",
2057 sdata->name, mgmt->bssid,
2058 le16_to_cpu(mgmt->u.deauth.reason_code));
2059
2060 list_del_rcu(&wk->list);
2061 free_work(wk);
2062 break;
2063 }
a1699b75 2064 mutex_unlock(&local->mtx);
f0706e82 2065
ce470613 2066 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2067 }
f0706e82
JB		 2068}
2069
9c6bd790 2070static void ieee80211_sta_timer(unsigned long data)
f0706e82 2071{
60f8b39c
JB		 2072 struct ieee80211_sub_if_data *sdata =
2073 (struct ieee80211_sub_if_data *) data;
46900298 2074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2075 struct ieee80211_local *local = sdata->local;
f0706e82 2076
5bb644a0
JB		 2077 if (local->quiescing) {
2078 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2079 return;
2080 }
2081
64592c8f 2082 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2083}
2084
04ac3c0e 2085static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2086 u8 *bssid, u8 reason)
04ac3c0e
FF		 2087{
2088 struct ieee80211_local *local = sdata->local;
2089 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2090
2091 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2092 IEEE80211_STA_BEACON_POLL);
2093
2094 ieee80211_set_disassoc(sdata, true, true);
2095 mutex_unlock(&ifmgd->mtx);
2096 mutex_lock(&local->mtx);
2097 ieee80211_recalc_idle(local);
2098 mutex_unlock(&local->mtx);
2099 /*
2100 * must be outside lock due to cfg80211,
2101 * but that's not a problem.
2102 */
2103 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2104 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2105 NULL, true);
2106 mutex_lock(&ifmgd->mtx);
2107}
2108
1fa57d01 2109void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2110{
9c6bd790 2111 struct ieee80211_local *local = sdata->local;
1fa57d01 2112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2113
77fdaa12
JB		 2114 /* then process the rest of the work */
2115 mutex_lock(&ifmgd->mtx);
2116
b291ba11
JB		 2117 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2118 IEEE80211_STA_CONNECTION_POLL) &&
2119 ifmgd->associated) {
a43abf29 2120 u8 bssid[ETH_ALEN];
72a8a3ed 2121 int max_tries;
a43abf29 2122
0c1ad2ca 2123 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2124
72a8a3ed 2125 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2126 max_tries = max_nullfunc_tries;
72a8a3ed 2127 else
180205bd 2128 max_tries = max_probe_tries;
72a8a3ed 2129
4e5ff376
FF		 2130 /* ACK received for nullfunc probing frame */
2131 if (!ifmgd->probe_send_count)
2132 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2133 else if (ifmgd->nullfunc_failed) {
2134 if (ifmgd->probe_send_count < max_tries) {
2135#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2136 wiphy_debug(local->hw.wiphy,
2137 "%s: No ack for nullfunc frame to"
bfc31df3 2138 " AP %pM, try %d/%i\n",
04ac3c0e 2139 sdata->name, bssid,
bfc31df3 2140 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2141#endif
2142 ieee80211_mgd_probe_ap_send(sdata);
2143 } else {
2144#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2145 wiphy_debug(local->hw.wiphy,
2146 "%s: No ack for nullfunc frame to"
2147 " AP %pM, disconnecting.\n",
c658e5db 2148 sdata->name, bssid);
04ac3c0e 2149#endif
95acac61
JB		 2150 ieee80211_sta_connection_lost(sdata, bssid,
2151 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2152 }
2153 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2154 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2155 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2156#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2157 wiphy_debug(local->hw.wiphy,
2158 "%s: Failed to send nullfunc to AP %pM"
2159 " after %dms, disconnecting.\n",
2160 sdata->name,
180205bd 2161 bssid, probe_wait_ms);
04ac3c0e 2162#endif
95acac61
JB		 2163 ieee80211_sta_connection_lost(sdata, bssid,
2164 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2165 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2166#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2167 wiphy_debug(local->hw.wiphy,
2168 "%s: No probe response from AP %pM"
bfc31df3 2169 " after %dms, try %d/%i\n",
b38afa87 2170 sdata->name,
180205bd 2171 bssid, probe_wait_ms,
bfc31df3 2172 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2173#endif
2174 ieee80211_mgd_probe_ap_send(sdata);
2175 } else {
b291ba11
JB		 2176 /*
2177 * We actually lost the connection ... or did we?
2178 * Let's make sure!
2179 */
b38afa87
BG		 2180 wiphy_debug(local->hw.wiphy,
2181 "%s: No probe response from AP %pM"
2182 " after %dms, disconnecting.\n",
2183 sdata->name,
180205bd 2184 bssid, probe_wait_ms);
04ac3c0e 2185
95acac61
JB		 2186 ieee80211_sta_connection_lost(sdata, bssid,
2187 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2188 }
2189 }
2190
77fdaa12 2191 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2192}
2193
b291ba11
JB		 2194static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2195{
2196 struct ieee80211_sub_if_data *sdata =
2197 (struct ieee80211_sub_if_data *) data;
2198 struct ieee80211_local *local = sdata->local;
2199
2200 if (local->quiescing)
2201 return;
2202
1e4dcd01
JO		 2203 ieee80211_queue_work(&sdata->local->hw,
2204 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2205}
2206
2207static void ieee80211_sta_conn_mon_timer(unsigned long data)
2208{
2209 struct ieee80211_sub_if_data *sdata =
2210 (struct ieee80211_sub_if_data *) data;
2211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2212 struct ieee80211_local *local = sdata->local;
2213
2214 if (local->quiescing)
2215 return;
2216
42935eca 2217 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2218}
2219
2220static void ieee80211_sta_monitor_work(struct work_struct *work)
2221{
2222 struct ieee80211_sub_if_data *sdata =
2223 container_of(work, struct ieee80211_sub_if_data,
2224 u.mgd.monitor_work);
2225
2226 ieee80211_mgd_probe_ap(sdata, false);
2227}
2228
9c6bd790
JB		 2229static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2230{
ad935687 2231 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2232 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2233 IEEE80211_STA_CONNECTION_POLL);
ad935687 2234
b291ba11 2235 /* let's probe the connection once */
42935eca 2236 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2237 &sdata->u.mgd.monitor_work);
2238 /* and do all the other regular work too */
64592c8f 2239 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2240 }
9c6bd790 2241}
f0706e82 2242
5bb644a0
JB		 2243#ifdef CONFIG_PM
2244void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2245{
2246 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2247
2248 /*
2249 * we need to use atomic bitops for the running bits
2250 * only because both timers might fire at the same
2251 * time -- the code here is properly synchronised.
2252 */
2253
d1f5b7a3
JB		 2254 cancel_work_sync(&ifmgd->request_smps_work);
2255
1e4dcd01 2256 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2257 if (del_timer_sync(&ifmgd->timer))
2258 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2259
2260 cancel_work_sync(&ifmgd->chswitch_work);
2261 if (del_timer_sync(&ifmgd->chswitch_timer))
2262 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2263
2264 cancel_work_sync(&ifmgd->monitor_work);
2265 /* these will just be re-established on connection */
2266 del_timer_sync(&ifmgd->conn_mon_timer);
2267 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2268}
2269
2270void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2271{
2272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2273
676b58c2
RM		 2274 if (!ifmgd->associated)
2275 return;
2276
95acac61
JB		 2277 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2278 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2279 mutex_lock(&ifmgd->mtx);
2280 if (ifmgd->associated) {
2281#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2282 wiphy_debug(sdata->local->hw.wiphy,
2283 "%s: driver requested disconnect after resume.\n",
2284 sdata->name);
2285#endif
2286 ieee80211_sta_connection_lost(sdata,
2287 ifmgd->associated->bssid,
2288 WLAN_REASON_UNSPECIFIED);
2289 mutex_unlock(&ifmgd->mtx);
2290 return;
2291 }
2292 mutex_unlock(&ifmgd->mtx);
2293 }
2294
5bb644a0
JB		 2295 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2296 add_timer(&ifmgd->timer);
2297 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2298 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2299 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2300 ieee80211_restart_sta_timer(sdata);
a6af1d84 2301 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2302}
2303#endif
2304
9c6bd790
JB		 2305/* interface setup */
2306void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2307{
46900298 2308 struct ieee80211_if_managed *ifmgd;
988c0f72 2309
46900298 2310 ifmgd = &sdata->u.mgd;
b291ba11 2311 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2312 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2313 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2314 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2315 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2316 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2317 (unsigned long) sdata);
b291ba11
JB		 2318 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2319 (unsigned long) sdata);
2320 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2321 (unsigned long) sdata);
46900298 2322 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2323 (unsigned long) sdata);
9c6bd790 2324
ab1faead 2325 ifmgd->flags = 0;
bbbdff9e 2326
77fdaa12 2327 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2328
2329 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2330 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2331 else
2332 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2333}
2334
77fdaa12
JB		 2335/* scan finished notification */
2336void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2337{
77fdaa12 2338 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2339
77fdaa12
JB		 2340 /* Restart STA timers */
2341 rcu_read_lock();
2342 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2343 ieee80211_restart_sta_timer(sdata);
2344 rcu_read_unlock();
2345}
60f8b39c 2346
77fdaa12
JB		 2347int ieee80211_max_network_latency(struct notifier_block *nb,
2348 unsigned long data, void *dummy)
2349{
2350 s32 latency_usec = (s32) data;
2351 struct ieee80211_local *local =
2352 container_of(nb, struct ieee80211_local,
2353 network_latency_notifier);
1fa6f4af 2354
77fdaa12
JB		 2355 mutex_lock(&local->iflist_mtx);
2356 ieee80211_recalc_ps(local, latency_usec);
2357 mutex_unlock(&local->iflist_mtx);
dfe67012 2358
77fdaa12 2359 return 0;
9c6bd790
JB		 2360}
2361
77fdaa12 2362/* config hooks */
af6b6374
JB		 2363static enum work_done_result
2364ieee80211_probe_auth_done(struct ieee80211_work *wk,
2365 struct sk_buff *skb)
2366{
b2abb6e2
JB		 2367 struct ieee80211_local *local = wk->sdata->local;
2368
af6b6374
JB		 2369 if (!skb) {
2370 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2371 goto destroy;
af6b6374
JB		 2372 }
2373
2374 if (wk->type == IEEE80211_WORK_AUTH) {
2375 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2376 goto destroy;
af6b6374
JB		 2377 }
2378
2379 mutex_lock(&wk->sdata->u.mgd.mtx);
2380 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2381 mutex_unlock(&wk->sdata->u.mgd.mtx);
2382
2383 wk->type = IEEE80211_WORK_AUTH;
2384 wk->probe_auth.tries = 0;
2385 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2386 destroy:
2387 if (wk->probe_auth.synced)
2388 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2389 IEEE80211_TX_SYNC_AUTH);
2390
2391 return WORK_DONE_DESTROY;
af6b6374
JB		 2392}
2393
77fdaa12
JB		 2394int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2395 struct cfg80211_auth_request *req)
9c6bd790 2396{
77fdaa12 2397 const u8 *ssid;
f679f65d 2398 struct ieee80211_work *wk;
77fdaa12 2399 u16 auth_alg;
9c6bd790 2400
d5cdfacb
JM		 2401 if (req->local_state_change)
2402 return 0; /* no need to update mac80211 state */
2403
77fdaa12
JB		 2404 switch (req->auth_type) {
2405 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2406 auth_alg = WLAN_AUTH_OPEN;
2407 break;
2408 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2409 if (IS_ERR(sdata->local->wep_tx_tfm))
2410 return -EOPNOTSUPP;
77fdaa12
JB		 2411 auth_alg = WLAN_AUTH_SHARED_KEY;
2412 break;
2413 case NL80211_AUTHTYPE_FT:
2414 auth_alg = WLAN_AUTH_FT;
2415 break;
2416 case NL80211_AUTHTYPE_NETWORK_EAP:
2417 auth_alg = WLAN_AUTH_LEAP;
2418 break;
2419 default:
2420 return -EOPNOTSUPP;
60f8b39c 2421 }
77fdaa12
JB		 2422
2423 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2424 if (!wk)
9c6bd790 2425 return -ENOMEM;
77fdaa12 2426
5e124bd5 2427 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2428
2429 if (req->ie && req->ie_len) {
2430 memcpy(wk->ie, req->ie, req->ie_len);
2431 wk->ie_len = req->ie_len;
9c6bd790 2432 }
77fdaa12 2433
fffd0934 2434 if (req->key && req->key_len) {
af6b6374
JB		 2435 wk->probe_auth.key_len = req->key_len;
2436 wk->probe_auth.key_idx = req->key_idx;
2437 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2438 }
2439
77fdaa12 2440 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2441 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2442 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2443
af6b6374
JB		 2444 wk->probe_auth.algorithm = auth_alg;
2445 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2446
070bb547
JB		 2447 /* if we already have a probe, don't probe again */
2448 if (req->bss->proberesp_ies)
2449 wk->type = IEEE80211_WORK_AUTH;
2450 else
2451 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2452 wk->chan = req->bss->channel;
4d51e149 2453 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2454 wk->sdata = sdata;
2455 wk->done = ieee80211_probe_auth_done;
77fdaa12 2456
af6b6374 2457 ieee80211_add_work(wk);
9c6bd790 2458 return 0;
60f8b39c
JB		 2459}
2460
2a33bee2
GE		 2461/* create and insert a dummy station entry */
2462static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2463 u8 *bssid) {
2464 struct sta_info *sta;
2465 int err;
2466
2467 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2468 if (!sta)
2a33bee2 2469 return -ENOMEM;
2a33bee2
GE		 2470
2471 sta->dummy = true;
2472
2473 err = sta_info_insert(sta);
2474 sta = NULL;
2475 if (err) {
2476 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2477 " the AP (error %d)\n", sdata->name, err);
2478 return err;
2479 }
2480
2481 return 0;
2482}
2483
af6b6374
JB		 2484static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2485 struct sk_buff *skb)
2486{
b2abb6e2 2487 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2488 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2489 struct ieee80211_rx_status *rx_status;
2490 struct ieee802_11_elems elems;
2a33bee2 2491 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2492 u16 status;
2493
2494 if (!skb) {
2a33bee2 2495 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2496 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2497 goto destroy;
af6b6374
JB		 2498 }
2499
e5b900d2
JB		 2500 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2501 mutex_lock(&wk->sdata->u.mgd.mtx);
2502 rx_status = (void *) skb->cb;
2503 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2504 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2505 &elems, true);
2506 mutex_unlock(&wk->sdata->u.mgd.mtx);
2507
2508 wk->type = IEEE80211_WORK_ASSOC;
2509 /* not really done yet */
2510 return WORK_DONE_REQUEUE;
2511 }
2512
af6b6374
JB		 2513 mgmt = (void *)skb->data;
2514 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2515
2516 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2517 if (wk->assoc.synced)
2518 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2519 IEEE80211_TX_SYNC_ASSOC);
2520
af6b6374
JB		 2521 mutex_lock(&wk->sdata->u.mgd.mtx);
2522 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2523 mutex_unlock(&wk->sdata->u.mgd.mtx);
2524 /* oops -- internal error -- send timeout for now */
2a33bee2 2525 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2526 cfg80211_send_assoc_timeout(wk->sdata->dev,
2527 wk->filter_ta);
2528 return WORK_DONE_DESTROY;
2529 }
68542962
JO		 2530
2531 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2532 } else {
2533 /* assoc failed - destroy the dummy station entry */
2534 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2535 }
2536
2537 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2538 destroy:
2539 if (wk->assoc.synced)
2540 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2541 IEEE80211_TX_SYNC_ASSOC);
2542
af6b6374
JB		 2543 return WORK_DONE_DESTROY;
2544}
2545
77fdaa12
JB		 2546int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2547 struct cfg80211_assoc_request *req)
f0706e82 2548{
77fdaa12 2549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2550 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2551 struct ieee80211_work *wk;
63f170e0 2552 const u8 *ssid;
2a33bee2 2553 int i, err;
f0706e82 2554
77fdaa12 2555 mutex_lock(&ifmgd->mtx);
af6b6374 2556 if (ifmgd->associated) {
9c87ba67
JM		 2557 if (!req->prev_bssid ||
2558 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2559 ETH_ALEN)) {
2560 /*
2561 * We are already associated and the request was not a
2562 * reassociation request from the current BSS, so
2563 * reject it.
2564 */
2565 mutex_unlock(&ifmgd->mtx);
2566 return -EALREADY;
2567 }
2568
2569 /* Trying to reassociate - clear previous association state */
53f73c09 2570 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2571 }
2572 mutex_unlock(&ifmgd->mtx);
77fdaa12 2573
63f170e0 2574 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2575 if (!wk)
2576 return -ENOMEM;
77fdaa12 2577
2a33bee2
GE		 2578 /*
2579 * create a dummy station info entry in order
2580 * to start accepting incoming EAPOL packets from the station
2581 */
2582 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2583 if (err) {
2584 kfree(wk);
2585 return err;
2586 }
2587
77fdaa12 2588 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2589 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2590
d8ec4433
JO		 2591 ifmgd->beacon_crc_valid = false;
2592
77fdaa12
JB		 2593 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2594 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2595 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2596 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2597 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2598
77fdaa12
JB		 2599
2600 if (req->ie && req->ie_len) {
2601 memcpy(wk->ie, req->ie, req->ie_len);
2602 wk->ie_len = req->ie_len;
2603 } else
2604 wk->ie_len = 0;
2605
0c1ad2ca 2606 wk->assoc.bss = req->bss;
f679f65d 2607
af6b6374 2608 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2609
af6b6374
JB		 2610 /* new association always uses requested smps mode */
2611 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2612 if (ifmgd->powersave)
2613 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2614 else
2615 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2616 } else
2617 ifmgd->ap_smps = ifmgd->req_smps;
2618
2619 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2620 /*
2621 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2622 * We still associate in non-HT mode (11a/b/g) if any one of these
2623 * ciphers is configured as pairwise.
2624 * We can set this to true for non-11n hardware, that'll be checked
2625 * separately along with the peer capabilities.
2626 */
af6b6374 2627 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2628 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2629 wk->assoc.wmm_used = bss->wmm_used;
2630 wk->assoc.supp_rates = bss->supp_rates;
2631 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2632 wk->assoc.ht_information_ie =
2633 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2634
ab13315a
KV		 2635 if (bss->wmm_used && bss->uapsd_supported &&
2636 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2637 wk->assoc.uapsd_used = true;
2638 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2639 } else {
2640 wk->assoc.uapsd_used = false;
2641 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2642 }
2643
63f170e0 2644 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2645 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2646 wk->assoc.ssid_len = ssid[1];
63f170e0 2647
77fdaa12 2648 if (req->prev_bssid)
f679f65d 2649 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2650
f679f65d 2651 wk->chan = req->bss->channel;
4d51e149 2652 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2653 wk->sdata = sdata;
2654 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2655 if (!bss->dtim_period &&
2656 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2657 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2658 else
2659 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2660
2661 if (req->use_mfp) {
2662 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2663 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2664 } else {
2665 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2666 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2667 }
2668
2669 if (req->crypto.control_port)
2670 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2671 else
2672 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2673
a621fa4d
JB		 2674 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2675 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2676
af6b6374
JB		 2677 ieee80211_add_work(wk);
2678 return 0;
f0706e82
JB		 2679}
2680
77fdaa12 2681int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2682 struct cfg80211_deauth_request *req,
2683 void *cookie)
f0706e82 2684{
af6b6374 2685 struct ieee80211_local *local = sdata->local;
46900298 2686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2687 struct ieee80211_work *wk;
05e48e8e
JM		 2688 u8 bssid[ETH_ALEN];
2689 bool assoc_bss = false;
f0706e82 2690
77fdaa12
JB		 2691 mutex_lock(&ifmgd->mtx);
2692
05e48e8e 2693 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2694 if (ifmgd->associated == req->bss) {
53f73c09 2695 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2696 mutex_unlock(&ifmgd->mtx);
05e48e8e 2697 assoc_bss = true;
af6b6374
JB		 2698 } else {
2699 bool not_auth_yet = false;
f0706e82 2700
a58ce43f 2701 mutex_unlock(&ifmgd->mtx);
a58ce43f 2702
a1699b75 2703 mutex_lock(&local->mtx);
af6b6374 2704 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2705 if (wk->sdata != sdata)
af6b6374 2706 continue;
29165e4c
JB		 2707
2708 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2709 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2710 wk->type != IEEE80211_WORK_ASSOC &&
2711 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2712 continue;
2713
af6b6374
JB		 2714 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2715 continue;
29165e4c
JB		 2716
2717 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2718 list_del_rcu(&wk->list);
af6b6374
JB		 2719 free_work(wk);
2720 break;
2721 }
a1699b75 2722 mutex_unlock(&local->mtx);
af6b6374
JB		 2723
2724 /*
2725 * If somebody requests authentication and we haven't
2726 * sent out an auth frame yet there's no need to send
2727 * out a deauth frame either. If the state was PROBE,
2728 * then this is the case. If it's AUTH we have sent a
2729 * frame, and if it's IDLE we have completed the auth
2730 * process already.
2731 */
2732 if (not_auth_yet) {
2733 __cfg80211_auth_canceled(sdata->dev, bssid);
2734 return 0;
2735 }
2736 }
77fdaa12 2737
0ff71613 2738 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2739 sdata->name, bssid, req->reason_code);
0ff71613 2740
d5cdfacb
JM		 2741 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2742 req->reason_code, cookie,
2743 !req->local_state_change);
05e48e8e 2744 if (assoc_bss)
07ba55d7 2745 sta_info_flush(sdata->local, sdata);
f0706e82 2746
7da7cc1d 2747 mutex_lock(&sdata->local->mtx);
bc83b681 2748 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2749 mutex_unlock(&sdata->local->mtx);
bc83b681 2750
f0706e82
JB		 2751 return 0;
2752}
84363e6e 2753
77fdaa12 2754int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2755 struct cfg80211_disassoc_request *req,
2756 void *cookie)
9c6bd790 2757{
77fdaa12 2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2759 u8 bssid[ETH_ALEN];
9c6bd790 2760
77fdaa12 2761 mutex_lock(&ifmgd->mtx);
10f644a4 2762
8d8b261a
JB		 2763 /*
2764 * cfg80211 should catch this ... but it's racy since
2765 * we can receive a disassoc frame, process it, hand it
2766 * to cfg80211 while that's in a locked section already
2767 * trying to tell us that the user wants to disconnect.
2768 */
0c1ad2ca 2769 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2770 mutex_unlock(&ifmgd->mtx);
2771 return -ENOLINK;
2772 }
2773
0ff71613 2774 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2775 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2776
e69e95db 2777 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2778 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2779
2780 mutex_unlock(&ifmgd->mtx);
10f644a4 2781
77fdaa12 2782 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2783 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2784 cookie, !req->local_state_change);
07ba55d7 2785 sta_info_flush(sdata->local, sdata);
bc83b681 2786
7da7cc1d 2787 mutex_lock(&sdata->local->mtx);
bc83b681 2788 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2789 mutex_unlock(&sdata->local->mtx);
bc83b681 2790
10f644a4
JB		 2791 return 0;
2792}
026331c4 2793
a97c13c3
JO		 2794void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2795 enum nl80211_cqm_rssi_threshold_event rssi_event,
2796 gfp_t gfp)
2797{
2798 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2799
b5878a2d
JB		 2800 trace_api_cqm_rssi_notify(sdata, rssi_event);
2801
a97c13c3
JO		 2802 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2803}
2804EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2805
2806unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2807{
2808 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2809 return sdata->dev->operstate;
2810}
2811EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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