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mac80211: reply only once to each PS-poll
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
d5522e03
JB		 165{
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
d5522e03
JB		 168 struct sta_info *sta;
169 u32 changed = 0;
172710bf 170 int hti_cfreq;
9ed6bcce 171 u16 ht_opmode;
0aaffa9b
JB		 172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
175
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
177
0aaffa9b
JB		 178 prev_chantype = sdata->vif.bss_conf.channel_type;
179
d5522e03
JB		 180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
182 enable_ht = false;
183
172710bf
BG		 184 if (enable_ht) {
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
186 sband->band);
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
192 */
193 printk(KERN_DEBUG
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
198 sdata->name,
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
201 sband->band);
202 enable_ht = false;
203 }
204 }
d5522e03
JB		 205
206 if (enable_ht) {
207 channel_type = NL80211_CHAN_HT20;
208
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
211 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
212 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 214 if (!(local->hw.conf.channel->flags &
215 IEEE80211_CHAN_NO_HT40PLUS))
216 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 217 break;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40MINUS))
221 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 222 break;
223 }
224 }
225 }
226
fe6f212c
RC		 227 if (local->tmp_channel)
228 local->tmp_channel_type = channel_type;
d5522e03 229
0aaffa9b
JB		 230 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type = NL80211_CHAN_HT20;
233 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
234 }
d5522e03 235
7cc44ed4
RM		 236 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
237 /*
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
241 */
242 ieee80211_stop_queues_by_reason(&sdata->local->hw,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
244
245 /* flush out all packets */
246 synchronize_net();
247
248 drv_flush(local, false);
249 }
250
0aaffa9b
JB		 251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local, 0);
d5522e03 253
0aaffa9b 254 if (prev_chantype != channel_type) {
d5522e03 255 rcu_read_lock();
abe60632 256 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 257 if (sta)
258 rate_control_rate_update(local, sband, sta,
4fa00437 259 IEEE80211_RC_HT_CHANGED,
0aaffa9b 260 channel_type);
d5522e03 261 rcu_read_unlock();
7cc44ed4
RM		 262
263 if (beacon_htcap_ie)
264 ieee80211_wake_queues_by_reason(&sdata->local->hw,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 266 }
d5522e03 267
9ed6bcce 268 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 269
270 /* if bss configuration changed store the new one */
0aaffa9b
JB		 271 if (sdata->ht_opmode_valid != enable_ht ||
272 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
273 prev_chantype != channel_type) {
d5522e03 274 changed |= BSS_CHANGED_HT;
9ed6bcce 275 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 276 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 277 }
278
279 return changed;
280}
281
9c6bd790
JB		 282/* frame sending functions */
283
ef422bc0 284static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 285 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 286 void *cookie, bool send_frame)
9ac19a90
JB		 287{
288 struct ieee80211_local *local = sdata->local;
46900298 289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 290 struct sk_buff *skb;
291 struct ieee80211_mgmt *mgmt;
9aed3cc1 292
65fc73ac 293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 294 if (!skb)
9ac19a90 295 return;
d15b8459 296
9ac19a90
JB		 297 skb_reserve(skb, local->hw.extra_tx_headroom);
298
299 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
300 memset(mgmt, 0, 24);
77fdaa12 301 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 305 skb_put(skb, 2);
ef422bc0 306 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 307 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
308
53b46b84 309 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 310 if (cookie)
311 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
312 else
313 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 314 else
ce470613
HS		 315 if (cookie)
316 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
317 else
318 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 319 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 321
322 if (send_frame)
323 ieee80211_tx_skb(sdata, skb);
324 else
325 kfree_skb(skb);
9ac19a90
JB		 326}
327
572e0012
KV		 328void ieee80211_send_pspoll(struct ieee80211_local *local,
329 struct ieee80211_sub_if_data *sdata)
330{
572e0012
KV		 331 struct ieee80211_pspoll *pspoll;
332 struct sk_buff *skb;
572e0012 333
d8cd189e
KV		 334 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
335 if (!skb)
572e0012 336 return;
572e0012 337
d8cd189e
KV		 338 pspoll = (struct ieee80211_pspoll *) skb->data;
339 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 340
62ae67be
JB		 341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 343}
344
965bedad
JB		 345void ieee80211_send_nullfunc(struct ieee80211_local *local,
346 struct ieee80211_sub_if_data *sdata,
347 int powersave)
348{
349 struct sk_buff *skb;
d8cd189e 350 struct ieee80211_hdr_3addr *nullfunc;
965bedad 351
d8cd189e
KV		 352 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
353 if (!skb)
965bedad 354 return;
965bedad 355
d8cd189e 356 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 357 if (powersave)
d8cd189e 358 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 359
62ae67be
JB		 360 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
361 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 362}
363
d524215f
FF		 364static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
365 struct ieee80211_sub_if_data *sdata)
366{
367 struct sk_buff *skb;
368 struct ieee80211_hdr *nullfunc;
369 __le16 fc;
370
371 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
372 return;
373
374 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 375 if (!skb)
d524215f 376 return;
d15b8459 377
d524215f
FF		 378 skb_reserve(skb, local->hw.extra_tx_headroom);
379
380 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
381 memset(nullfunc, 0, 30);
382 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
383 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
384 nullfunc->frame_control = fc;
385 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
386 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
387 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
388 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
389
390 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
391 ieee80211_tx_skb(sdata, skb);
392}
393
cc32abd4
JB		 394/* spectrum management related things */
395static void ieee80211_chswitch_work(struct work_struct *work)
396{
397 struct ieee80211_sub_if_data *sdata =
398 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
400
9607e6b6 401 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 402 return;
403
77fdaa12
JB		 404 mutex_lock(&ifmgd->mtx);
405 if (!ifmgd->associated)
406 goto out;
cc32abd4
JB		 407
408 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 409 if (!sdata->local->ops->channel_switch) {
410 /* call "hw_config" only if doing sw channel switch */
411 ieee80211_hw_config(sdata->local,
412 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 413 } else {
414 /* update the device channel directly */
415 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 416 }
77fdaa12 417
cc32abd4 418 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 419 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 420
cc32abd4
JB		 421 ieee80211_wake_queues_by_reason(&sdata->local->hw,
422 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 423 out:
424 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
425 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 426}
427
5ce6e438
JB		 428void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
429{
430 struct ieee80211_sub_if_data *sdata;
431 struct ieee80211_if_managed *ifmgd;
432
433 sdata = vif_to_sdata(vif);
434 ifmgd = &sdata->u.mgd;
435
436 trace_api_chswitch_done(sdata, success);
437 if (!success) {
438 /*
439 * If the channel switch was not successful, stay
440 * around on the old channel. We currently lack
441 * good handling of this situation, possibly we
442 * should just drop the association.
443 */
444 sdata->local->csa_channel = sdata->local->oper_channel;
445 }
446
447 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
448}
449EXPORT_SYMBOL(ieee80211_chswitch_done);
450
cc32abd4
JB		 451static void ieee80211_chswitch_timer(unsigned long data)
452{
453 struct ieee80211_sub_if_data *sdata =
454 (struct ieee80211_sub_if_data *) data;
455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
456
5bb644a0
JB		 457 if (sdata->local->quiescing) {
458 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
459 return;
460 }
461
42935eca 462 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 463}
464
465void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
466 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 467 struct ieee80211_bss *bss,
468 u64 timestamp)
cc32abd4 469{
0c1ad2ca
JB		 470 struct cfg80211_bss *cbss =
471 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 472 struct ieee80211_channel *new_ch;
473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 474 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
475 cbss->channel->band);
cc32abd4 476
77fdaa12
JB		 477 ASSERT_MGD_MTX(ifmgd);
478
479 if (!ifmgd->associated)
cc32abd4
JB		 480 return;
481
fbe9c429 482 if (sdata->local->scanning)
cc32abd4
JB		 483 return;
484
485 /* Disregard subsequent beacons if we are already running a timer
486 processing a CSA */
487
488 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
489 return;
490
491 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
492 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
493 return;
494
495 sdata->local->csa_channel = new_ch;
496
5ce6e438
JB		 497 if (sdata->local->ops->channel_switch) {
498 /* use driver's channel switch callback */
499 struct ieee80211_channel_switch ch_switch;
500 memset(&ch_switch, 0, sizeof(ch_switch));
501 ch_switch.timestamp = timestamp;
502 if (sw_elem->mode) {
503 ch_switch.block_tx = true;
504 ieee80211_stop_queues_by_reason(&sdata->local->hw,
505 IEEE80211_QUEUE_STOP_REASON_CSA);
506 }
507 ch_switch.channel = new_ch;
508 ch_switch.count = sw_elem->count;
509 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
510 drv_channel_switch(sdata->local, &ch_switch);
511 return;
512 }
513
514 /* channel switch handled in software */
cc32abd4 515 if (sw_elem->count <= 1) {
42935eca 516 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 517 } else {
9feaddc7
WYG		 518 if (sw_elem->mode)
519 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 520 IEEE80211_QUEUE_STOP_REASON_CSA);
521 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
522 mod_timer(&ifmgd->chswitch_timer,
523 jiffies +
524 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 525 cbss->beacon_interval));
cc32abd4
JB		 526 }
527}
528
529static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
530 u16 capab_info, u8 *pwr_constr_elem,
531 u8 pwr_constr_elem_len)
532{
533 struct ieee80211_conf *conf = &sdata->local->hw.conf;
534
535 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
536 return;
537
538 /* Power constraint IE length should be 1 octet */
539 if (pwr_constr_elem_len != 1)
540 return;
541
542 if ((*pwr_constr_elem <= conf->channel->max_power) &&
543 (*pwr_constr_elem != sdata->local->power_constr_level)) {
544 sdata->local->power_constr_level = *pwr_constr_elem;
545 ieee80211_hw_config(sdata->local, 0);
546 }
547}
548
f90754c1
JO		 549void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
550{
551 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
552 struct ieee80211_local *local = sdata->local;
553 struct ieee80211_conf *conf = &local->hw.conf;
554
555 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
556 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
557 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
558
559 local->disable_dynamic_ps = false;
560 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
561}
562EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
563
564void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
565{
566 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
567 struct ieee80211_local *local = sdata->local;
568 struct ieee80211_conf *conf = &local->hw.conf;
569
570 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
571 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
572 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
573
574 local->disable_dynamic_ps = true;
575 conf->dynamic_ps_timeout = 0;
576 del_timer_sync(&local->dynamic_ps_timer);
577 ieee80211_queue_work(&local->hw,
578 &local->dynamic_ps_enable_work);
579}
580EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
581
965bedad
JB		 582/* powersave */
583static void ieee80211_enable_ps(struct ieee80211_local *local,
584 struct ieee80211_sub_if_data *sdata)
585{
586 struct ieee80211_conf *conf = &local->hw.conf;
587
d5edaedc
JB		 588 /*
589 * If we are scanning right now then the parameters will
590 * take effect when scan finishes.
591 */
fbe9c429 592 if (local->scanning)
d5edaedc
JB		 593 return;
594
965bedad
JB		 595 if (conf->dynamic_ps_timeout > 0 &&
596 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
597 mod_timer(&local->dynamic_ps_timer, jiffies +
598 msecs_to_jiffies(conf->dynamic_ps_timeout));
599 } else {
600 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
601 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 602
2a13052f
JO		 603 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
604 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
605 return;
606
607 conf->flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 609 }
610}
611
612static void ieee80211_change_ps(struct ieee80211_local *local)
613{
614 struct ieee80211_conf *conf = &local->hw.conf;
615
616 if (local->ps_sdata) {
965bedad
JB		 617 ieee80211_enable_ps(local, local->ps_sdata);
618 } else if (conf->flags & IEEE80211_CONF_PS) {
619 conf->flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 del_timer_sync(&local->dynamic_ps_timer);
622 cancel_work_sync(&local->dynamic_ps_enable_work);
623 }
624}
625
808118cb
JY		 626static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
627{
628 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
629 struct sta_info *sta = NULL;
630 u32 sta_flags = 0;
631
632 if (!mgd->powersave)
633 return false;
634
635 if (!mgd->associated)
636 return false;
637
638 if (!mgd->associated->beacon_ies)
639 return false;
640
641 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
642 IEEE80211_STA_CONNECTION_POLL))
643 return false;
644
645 rcu_read_lock();
646 sta = sta_info_get(sdata, mgd->bssid);
647 if (sta)
648 sta_flags = get_sta_flags(sta);
649 rcu_read_unlock();
650
651 if (!(sta_flags & WLAN_STA_AUTHORIZED))
652 return false;
653
654 return true;
655}
656
965bedad 657/* need to hold RTNL or interface lock */
10f644a4 658void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 659{
660 struct ieee80211_sub_if_data *sdata, *found = NULL;
661 int count = 0;
195e294d 662 int timeout;
965bedad
JB		 663
664 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
665 local->ps_sdata = NULL;
666 return;
667 }
668
af6b6374
JB		 669 if (!list_empty(&local->work_list)) {
670 local->ps_sdata = NULL;
671 goto change;
672 }
673
965bedad 674 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 675 if (!ieee80211_sdata_running(sdata))
965bedad 676 continue;
8c7914de
RM		 677 if (sdata->vif.type == NL80211_IFTYPE_AP) {
678 /* If an AP vif is found, then disable PS
679 * by setting the count to zero thereby setting
680 * ps_sdata to NULL.
681 */
682 count = 0;
683 break;
684 }
965bedad
JB		 685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
686 continue;
687 found = sdata;
688 count++;
689 }
690
808118cb 691 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 692 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 693 s32 beaconint_us;
694
695 if (latency < 0)
ed77134b 696 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 697
698 beaconint_us = ieee80211_tu_to_usec(
699 found->vif.bss_conf.beacon_int);
700
ff616381 701 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 702 if (timeout < 0) {
703 /*
ff616381
JO		 704 * Go to full PSM if the user configures a very low
705 * latency requirement.
0ab82b04
EP		 706 * The 2000 second value is there for compatibility
707 * until the PM_QOS_NETWORK_LATENCY is configured
708 * with real values.
195e294d 709 */
0ab82b04
EP		 710 if (latency > (1900 * USEC_PER_MSEC) &&
711 latency != (2000 * USEC_PER_SEC))
195e294d 712 timeout = 0;
ff616381
JO		 713 else
714 timeout = 100;
195e294d 715 }
f90754c1
JO		 716 local->dynamic_ps_user_timeout = timeout;
717 if (!local->disable_dynamic_ps)
718 conf->dynamic_ps_timeout =
719 local->dynamic_ps_user_timeout;
195e294d 720
04fe2037 721 if (beaconint_us > latency) {
10f644a4 722 local->ps_sdata = NULL;
04fe2037 723 } else {
56007a02 724 struct ieee80211_bss *bss;
04fe2037 725 int maxslp = 1;
56007a02 726 u8 dtimper;
04fe2037 727
56007a02
JB		 728 bss = (void *)found->u.mgd.associated->priv;
729 dtimper = bss->dtim_period;
730
731 /* If the TIM IE is invalid, pretend the value is 1 */
732 if (!dtimper)
733 dtimper = 1;
734 else if (dtimper > 1)
04fe2037
JB		 735 maxslp = min_t(int, dtimper,
736 latency / beaconint_us);
737
9ccebe61 738 local->hw.conf.max_sleep_period = maxslp;
56007a02 739 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 740 local->ps_sdata = found;
04fe2037 741 }
10f644a4 742 } else {
965bedad 743 local->ps_sdata = NULL;
10f644a4 744 }
965bedad 745
af6b6374 746 change:
965bedad
JB		 747 ieee80211_change_ps(local);
748}
749
750void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
751{
752 struct ieee80211_local *local =
753 container_of(work, struct ieee80211_local,
754 dynamic_ps_disable_work);
755
756 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
757 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
758 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
759 }
760
761 ieee80211_wake_queues_by_reason(&local->hw,
762 IEEE80211_QUEUE_STOP_REASON_PS);
763}
764
765void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
766{
767 struct ieee80211_local *local =
768 container_of(work, struct ieee80211_local,
769 dynamic_ps_enable_work);
770 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 771 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 772 unsigned long flags;
773 int q;
965bedad
JB		 774
775 /* can only happen when PS was just disabled anyway */
776 if (!sdata)
777 return;
778
5e34069c
CL		 779 ifmgd = &sdata->u.mgd;
780
965bedad
JB		 781 if (local->hw.conf.flags & IEEE80211_CONF_PS)
782 return;
783
77b7023a
AN		 784 if (!local->disable_dynamic_ps &&
785 local->hw.conf.dynamic_ps_timeout > 0) {
786 /* don't enter PS if TX frames are pending */
787 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 788 mod_timer(&local->dynamic_ps_timer, jiffies +
789 msecs_to_jiffies(
790 local->hw.conf.dynamic_ps_timeout));
791 return;
792 }
77b7023a
AN		 793
794 /*
795 * transmission can be stopped by others which leads to
796 * dynamic_ps_timer expiry. Postpone the ps timer if it
797 * is not the actual idle state.
798 */
799 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
800 for (q = 0; q < local->hw.queues; q++) {
801 if (local->queue_stop_reasons[q]) {
802 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
803 flags);
804 mod_timer(&local->dynamic_ps_timer, jiffies +
805 msecs_to_jiffies(
806 local->hw.conf.dynamic_ps_timeout));
807 return;
808 }
809 }
810 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 811 }
1ddc2867 812
375177bf 813 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 814 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
815 netif_tx_stop_all_queues(sdata->dev);
965bedad 816
e8306f98
VN		 817 if (drv_tx_frames_pending(local))
818 mod_timer(&local->dynamic_ps_timer, jiffies +
819 msecs_to_jiffies(
820 local->hw.conf.dynamic_ps_timeout));
821 else {
822 ieee80211_send_nullfunc(local, sdata, 1);
823 /* Flush to get the tx status of nullfunc frame */
824 drv_flush(local, false);
825 }
f3e85b9e
VN		 826 }
827
2a13052f
JO		 828 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
829 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 830 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
831 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
832 local->hw.conf.flags |= IEEE80211_CONF_PS;
833 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
834 }
f3e85b9e 835
77b7023a
AN		 836 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
837 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 838}
839
840void ieee80211_dynamic_ps_timer(unsigned long data)
841{
842 struct ieee80211_local *local = (void *) data;
843
78f1a8b7 844 if (local->quiescing || local->suspended)
5bb644a0
JB		 845 return;
846
42935eca 847 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 848}
849
60f8b39c 850/* MLME */
f698d856 851static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 852 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 853 u8 *wmm_param, size_t wmm_param_len)
854{
f0706e82 855 struct ieee80211_tx_queue_params params;
4ced3f74 856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 857 size_t left;
858 int count;
ab13315a 859 u8 *pos, uapsd_queues = 0;
f0706e82 860
e1b3ec1a
SG		 861 if (!local->ops->conf_tx)
862 return;
863
af6b6374 864 if (local->hw.queues < 4)
3434fbd3
JB		 865 return;
866
867 if (!wmm_param)
868 return;
869
f0706e82
JB		 870 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
871 return;
ab13315a
KV		 872
873 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 874 uapsd_queues = local->uapsd_queues;
ab13315a 875
f0706e82 876 count = wmm_param[6] & 0x0f;
46900298 877 if (count == ifmgd->wmm_last_param_set)
f0706e82 878 return;
46900298 879 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 880
881 pos = wmm_param + 8;
882 left = wmm_param_len - 8;
883
884 memset(&params, 0, sizeof(params));
885
f0706e82
JB		 886 local->wmm_acm = 0;
887 for (; left >= 4; left -= 4, pos += 4) {
888 int aci = (pos[0] >> 5) & 0x03;
889 int acm = (pos[0] >> 4) & 0x01;
ab13315a 890 bool uapsd = false;
f0706e82
JB		 891 int queue;
892
893 switch (aci) {
0eeb59fe 894 case 1: /* AC_BK */
e100bb64 895 queue = 3;
988c0f72 896 if (acm)
0eeb59fe 897 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 898 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
899 uapsd = true;
f0706e82 900 break;
0eeb59fe 901 case 2: /* AC_VI */
e100bb64 902 queue = 1;
988c0f72 903 if (acm)
0eeb59fe 904 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 905 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
906 uapsd = true;
f0706e82 907 break;
0eeb59fe 908 case 3: /* AC_VO */
e100bb64 909 queue = 0;
988c0f72 910 if (acm)
0eeb59fe 911 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
913 uapsd = true;
f0706e82 914 break;
0eeb59fe 915 case 0: /* AC_BE */
f0706e82 916 default:
e100bb64 917 queue = 2;
988c0f72 918 if (acm)
0eeb59fe 919 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
921 uapsd = true;
f0706e82
JB		 922 break;
923 }
924
925 params.aifs = pos[0] & 0x0f;
926 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
927 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 928 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 929 params.uapsd = uapsd;
930
f4ea83dd 931#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 932 wiphy_debug(local->hw.wiphy,
933 "WMM queue=%d aci=%d acm=%d aifs=%d "
934 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
935 queue, aci, acm,
936 params.aifs, params.cw_min, params.cw_max,
937 params.txop, params.uapsd);
3330d7be 938#endif
f6f3def3
EP		 939 sdata->tx_conf[queue] = params;
940 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 941 wiphy_debug(local->hw.wiphy,
942 "failed to set TX queue parameters for queue %d\n",
943 queue);
f0706e82 944 }
e1b3ec1a
SG		 945
946 /* enable WMM or activate new settings */
4ced3f74
JB		 947 sdata->vif.bss_conf.qos = true;
948 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 949}
950
7a5158ef
JB		 951static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
952 u16 capab, bool erp_valid, u8 erp)
5628221c 953{
bda3933a 954 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 955 u32 changed = 0;
7a5158ef
JB		 956 bool use_protection;
957 bool use_short_preamble;
958 bool use_short_slot;
959
960 if (erp_valid) {
961 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
962 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
963 } else {
964 use_protection = false;
965 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
966 }
967
968 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 969 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
970 use_short_slot = true;
5628221c 971
471b3efd 972 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 973 bss_conf->use_cts_prot = use_protection;
974 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 975 }
7e9ed188 976
d43c7b37 977 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 978 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 979 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 980 }
d9430a32 981
7a5158ef 982 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 983 bss_conf->use_short_slot = use_short_slot;
984 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 985 }
986
987 return changed;
988}
989
f698d856 990static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 991 struct cfg80211_bss *cbss,
ae5eb026 992 u32 bss_info_changed)
f0706e82 993{
0c1ad2ca 994 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 995 struct ieee80211_local *local = sdata->local;
68542962 996 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 997
ae5eb026 998 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 999 /* set timing information */
68542962
JO		 1000 bss_conf->beacon_int = cbss->beacon_interval;
1001 bss_conf->timestamp = cbss->tsf;
5628221c 1002
77fdaa12
JB		 1003 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1004 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1005 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1006
7ccc8bd7
FF		 1007 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1008 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1009
0c1ad2ca
JB		 1010 sdata->u.mgd.associated = cbss;
1011 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1012
17e4ec14
JM		 1013 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1014
b291ba11
JB		 1015 /* just to be sure */
1016 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1017 IEEE80211_STA_BEACON_POLL);
1018
9ac19a90 1019 ieee80211_led_assoc(local, 1);
9306102e 1020
e5b900d2
JB		 1021 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1022 bss_conf->dtim_period = bss->dtim_period;
1023 else
1024 bss_conf->dtim_period = 0;
1025
68542962 1026 bss_conf->assoc = 1;
96dd22ac
JB		 1027 /*
1028 * For now just always ask the driver to update the basic rateset
1029 * when we have associated, we aren't checking whether it actually
1030 * changed or not.
1031 */
ae5eb026 1032 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1033
1034 /* And the BSSID changed - we're associated now */
1035 bss_info_changed |= BSS_CHANGED_BSSID;
1036
a97c13c3
JO		 1037 /* Tell the driver to monitor connection quality (if supported) */
1038 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1039 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1040 bss_info_changed |= BSS_CHANGED_CQM;
1041
68542962
JO		 1042 /* Enable ARP filtering */
1043 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1044 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1045 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1046 }
1047
ae5eb026 1048 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1049
056508dc
JB		 1050 mutex_lock(&local->iflist_mtx);
1051 ieee80211_recalc_ps(local, -1);
025e6be2 1052 ieee80211_recalc_smps(local);
056508dc 1053 mutex_unlock(&local->iflist_mtx);
e0cb686f 1054
8a5b33f5 1055 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1056 netif_carrier_on(sdata->dev);
f0706e82
JB		 1057}
1058
e69e95db 1059static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1060 bool remove_sta, bool tx)
aa458d17 1061{
46900298 1062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1063 struct ieee80211_local *local = sdata->local;
1064 struct sta_info *sta;
e0cb686f 1065 u32 changed = 0, config_changed = 0;
b291ba11 1066 u8 bssid[ETH_ALEN];
aa458d17 1067
77fdaa12
JB		 1068 ASSERT_MGD_MTX(ifmgd);
1069
b291ba11
JB		 1070 if (WARN_ON(!ifmgd->associated))
1071 return;
1072
0c1ad2ca 1073 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1074
77fdaa12
JB		 1075 ifmgd->associated = NULL;
1076 memset(ifmgd->bssid, 0, ETH_ALEN);
1077
1078 /*
1079 * we need to commit the associated = NULL change because the
1080 * scan code uses that to determine whether this iface should
1081 * go to/wake up from powersave or not -- and could otherwise
1082 * wake the queues erroneously.
1083 */
1084 smp_mb();
1085
1086 /*
1087 * Thus, we can only afterwards stop the queues -- to account
1088 * for the case where another CPU is finishing a scan at this
1089 * time -- we don't want the scan code to enable queues.
1090 */
aa458d17 1091
8a5b33f5 1092 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1093 netif_carrier_off(sdata->dev);
1094
2a419056 1095 mutex_lock(&local->sta_mtx);
abe60632 1096 sta = sta_info_get(sdata, bssid);
4cad6c7c 1097 if (sta) {
2a419056 1098 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1099 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1100 }
2a419056 1101 mutex_unlock(&local->sta_mtx);
aa458d17 1102
f5e5bf25
TW		 1103 changed |= ieee80211_reset_erp_info(sdata);
1104
f5e5bf25 1105 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1106 changed |= BSS_CHANGED_ASSOC;
1107 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1108
aa837e1d
JB		 1109 ieee80211_set_wmm_default(sdata);
1110
4797938c 1111 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1112 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1113
413ad50a
JB		 1114 /* on the next assoc, re-program HT parameters */
1115 sdata->ht_opmode_valid = false;
1116
a8302de9
VT		 1117 local->power_constr_level = 0;
1118
520eb820
KV		 1119 del_timer_sync(&local->dynamic_ps_timer);
1120 cancel_work_sync(&local->dynamic_ps_enable_work);
1121
e0cb686f
KV		 1122 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1123 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1124 config_changed |= IEEE80211_CONF_CHANGE_PS;
1125 }
a331400b 1126 local->ps_sdata = NULL;
ae5eb026 1127
e0cb686f 1128 ieee80211_hw_config(local, config_changed);
9cef8737 1129
68542962
JO		 1130 /* Disable ARP filtering */
1131 if (sdata->vif.bss_conf.arp_filter_enabled) {
1132 sdata->vif.bss_conf.arp_filter_enabled = false;
1133 changed |= BSS_CHANGED_ARP_FILTER;
1134 }
1135
0aaffa9b
JB		 1136 /* The BSSID (not really interesting) and HT changed */
1137 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1138 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1139
07ba55d7 1140 /* remove AP and TDLS peers */
e69e95db 1141 if (remove_sta)
07ba55d7 1142 sta_info_flush(local, sdata);
b9dcf712
JB		 1143
1144 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1145 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1146 del_timer_sync(&sdata->u.mgd.timer);
1147 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1148}
f0706e82 1149
3cf335d5
KV		 1150void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1151 struct ieee80211_hdr *hdr)
1152{
1153 /*
1154 * We can postpone the mgd.timer whenever receiving unicast frames
1155 * from AP because we know that the connection is working both ways
1156 * at that time. But multicast frames (and hence also beacons) must
1157 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1158 * data idle periods for sending the periodic probe request to the
1159 * AP we're connected to.
3cf335d5 1160 */
b291ba11
JB		 1161 if (is_multicast_ether_addr(hdr->addr1))
1162 return;
1163
be099e82 1164 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1165}
f0706e82 1166
4e5ff376
FF		 1167static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1168{
1169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1170
1171 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1172 IEEE80211_STA_CONNECTION_POLL)))
1173 return;
1174
1175 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1176 IEEE80211_STA_BEACON_POLL);
1177 mutex_lock(&sdata->local->iflist_mtx);
1178 ieee80211_recalc_ps(sdata->local, -1);
1179 mutex_unlock(&sdata->local->iflist_mtx);
1180
1181 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1182 return;
1183
1184 /*
1185 * We've received a probe response, but are not sure whether
1186 * we have or will be receiving any beacons or data, so let's
1187 * schedule the timers again, just in case.
1188 */
1189 ieee80211_sta_reset_beacon_monitor(sdata);
1190
1191 mod_timer(&ifmgd->conn_mon_timer,
1192 round_jiffies_up(jiffies +
1193 IEEE80211_CONNECTION_IDLE_TIME));
1194}
1195
1196void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1197 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1198{
75706d0e 1199 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1200 return;
1201
04ac3c0e
FF		 1202 if (ack)
1203 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1204
1205 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1206 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1207 if (ack)
1208 sdata->u.mgd.probe_send_count = 0;
1209 else
1210 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1211 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1212 }
1213}
1214
a43abf29
ML		 1215static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1216{
1217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1218 const u8 *ssid;
f01a067d 1219 u8 *dst = ifmgd->associated->bssid;
180205bd 1220 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1221
1222 /*
1223 * Try sending broadcast probe requests for the last three
1224 * probe requests after the first ones failed since some
1225 * buggy APs only support broadcast probe requests.
1226 */
1227 if (ifmgd->probe_send_count >= unicast_limit)
1228 dst = NULL;
a43abf29 1229
4e5ff376
FF		 1230 /*
1231 * When the hardware reports an accurate Tx ACK status, it's
1232 * better to send a nullfunc frame instead of a probe request,
1233 * as it will kick us off the AP quickly if we aren't associated
1234 * anymore. The timeout will be reset if the frame is ACKed by
1235 * the AP.
1236 */
04ac3c0e
FF		 1237 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1238 ifmgd->nullfunc_failed = false;
4e5ff376 1239 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1240 } else {
4e5ff376 1241 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1242 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1243 (u32) -1, true, false);
4e5ff376 1244 }
a43abf29
ML		 1245
1246 ifmgd->probe_send_count++;
180205bd 1247 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1248 run_again(ifmgd, ifmgd->probe_timeout);
1249}
1250
b291ba11
JB		 1251static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1252 bool beacon)
04de8381 1253{
04de8381 1254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1255 bool already = false;
34bfc411 1256
9607e6b6 1257 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1258 return;
1259
91a3bd76
LR		 1260 if (sdata->local->scanning)
1261 return;
1262
b8bc4b0a
JB		 1263 if (sdata->local->tmp_channel)
1264 return;
1265
77fdaa12
JB		 1266 mutex_lock(&ifmgd->mtx);
1267
1268 if (!ifmgd->associated)
1269 goto out;
1270
a860402d 1271#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1272 if (beacon && net_ratelimit())
1273 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1274 "- sending probe request\n", sdata->name);
a860402d 1275#endif
04de8381 1276
b291ba11
JB		 1277 /*
1278 * The driver/our work has already reported this event or the
1279 * connection monitoring has kicked in and we have already sent
1280 * a probe request. Or maybe the AP died and the driver keeps
1281 * reporting until we disassociate...
1282 *
1283 * In either case we have to ignore the current call to this
1284 * function (except for setting the correct probe reason bit)
1285 * because otherwise we would reset the timer every time and
1286 * never check whether we received a probe response!
1287 */
1288 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1289 IEEE80211_STA_CONNECTION_POLL))
1290 already = true;
1291
1292 if (beacon)
1293 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1294 else
1295 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1296
1297 if (already)
1298 goto out;
1299
4e751843
JB		 1300 mutex_lock(&sdata->local->iflist_mtx);
1301 ieee80211_recalc_ps(sdata->local, -1);
1302 mutex_unlock(&sdata->local->iflist_mtx);
1303
a43abf29
ML		 1304 ifmgd->probe_send_count = 0;
1305 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1306 out:
1307 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1308}
1309
a619a4c0
JO		 1310struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1311 struct ieee80211_vif *vif)
1312{
1313 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1315 struct sk_buff *skb;
1316 const u8 *ssid;
1317
1318 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1319 return NULL;
1320
1321 ASSERT_MGD_MTX(ifmgd);
1322
1323 if (!ifmgd->associated)
1324 return NULL;
1325
1326 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1327 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1328 (u32) -1, ssid + 2, ssid[1],
1329 NULL, 0, true);
a619a4c0
JO		 1330
1331 return skb;
1332}
1333EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1334
1e4dcd01
JO		 1335static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1336{
1337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1338 struct ieee80211_local *local = sdata->local;
1339 u8 bssid[ETH_ALEN];
1340
1341 mutex_lock(&ifmgd->mtx);
1342 if (!ifmgd->associated) {
1343 mutex_unlock(&ifmgd->mtx);
1344 return;
1345 }
1346
1347 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1348
180205bd
BG		 1349 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1350 sdata->name, bssid);
1e4dcd01 1351
53f73c09 1352 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1353 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1354
1355 mutex_lock(&local->mtx);
1356 ieee80211_recalc_idle(local);
1357 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1358 /*
1359 * must be outside lock due to cfg80211,
1360 * but that's not a problem.
1361 */
1362 ieee80211_send_deauth_disassoc(sdata, bssid,
1363 IEEE80211_STYPE_DEAUTH,
1364 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1365 NULL, true);
1e4dcd01
JO		 1366}
1367
1368void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1369{
1370 struct ieee80211_sub_if_data *sdata =
1371 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1372 u.mgd.beacon_connection_loss_work);
b291ba11 1373
1e4dcd01
JO		 1374 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1375 __ieee80211_connection_loss(sdata);
1376 else
1377 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1378}
1379
04de8381
KV		 1380void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1381{
1382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1383 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1384
b5878a2d
JB		 1385 trace_api_beacon_loss(sdata);
1386
1e4dcd01
JO		 1387 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1388 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1389}
1390EXPORT_SYMBOL(ieee80211_beacon_loss);
1391
1e4dcd01
JO		 1392void ieee80211_connection_loss(struct ieee80211_vif *vif)
1393{
1394 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1395 struct ieee80211_hw *hw = &sdata->local->hw;
1396
b5878a2d
JB		 1397 trace_api_connection_loss(sdata);
1398
1e4dcd01
JO		 1399 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1400 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1401}
1402EXPORT_SYMBOL(ieee80211_connection_loss);
1403
1404
77fdaa12
JB		 1405static enum rx_mgmt_action __must_check
1406ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1407 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1408{
46900298 1409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1410 const u8 *bssid = NULL;
f0706e82
JB		 1411 u16 reason_code;
1412
f4ea83dd 1413 if (len < 24 + 2)
77fdaa12 1414 return RX_MGMT_NONE;
f0706e82 1415
77fdaa12
JB		 1416 ASSERT_MGD_MTX(ifmgd);
1417
0c1ad2ca 1418 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1419
1420 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1421
77fdaa12 1422 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1423 sdata->name, bssid, reason_code);
77fdaa12 1424
53f73c09 1425 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1426 mutex_lock(&sdata->local->mtx);
63f170e0 1427 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1428 mutex_unlock(&sdata->local->mtx);
f0706e82 1429
77fdaa12 1430 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1431}
1432
1433
77fdaa12
JB		 1434static enum rx_mgmt_action __must_check
1435ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1436 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1437{
46900298 1438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1439 u16 reason_code;
1440
f4ea83dd 1441 if (len < 24 + 2)
77fdaa12 1442 return RX_MGMT_NONE;
f0706e82 1443
77fdaa12
JB		 1444 ASSERT_MGD_MTX(ifmgd);
1445
1446 if (WARN_ON(!ifmgd->associated))
1447 return RX_MGMT_NONE;
1448
0c1ad2ca 1449 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1450 return RX_MGMT_NONE;
f0706e82
JB		 1451
1452 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1453
0ff71613 1454 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1455 sdata->name, mgmt->sa, reason_code);
f0706e82 1456
53f73c09 1457 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1458 mutex_lock(&sdata->local->mtx);
bc83b681 1459 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1460 mutex_unlock(&sdata->local->mtx);
77fdaa12 1461 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1462}
1463
1464
af6b6374
JB		 1465static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1466 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1467{
af6b6374 1468 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1470 struct ieee80211_local *local = sdata->local;
8318d78a 1471 struct ieee80211_supported_band *sband;
f0706e82 1472 struct sta_info *sta;
0c1ad2ca 1473 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1474 u8 *pos;
881d948c 1475 u32 rates, basic_rates;
af6b6374 1476 u16 capab_info, aid;
f0706e82 1477 struct ieee802_11_elems elems;
bda3933a 1478 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1479 u32 changed = 0;
5d1ec85f
JB		 1480 int i, j, err;
1481 bool have_higher_than_11mbit = false;
ae5eb026 1482 u16 ap_ht_cap_flags;
f0706e82 1483
af6b6374 1484 /* AssocResp and ReassocResp have identical structure */
f0706e82 1485
f0706e82 1486 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1487 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1488
1dd84aa2
JB		 1489 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1490 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1491 "set\n", sdata->name, aid);
1dd84aa2
JB		 1492 aid &= ~(BIT(15) | BIT(14));
1493
af6b6374
JB		 1494 pos = mgmt->u.assoc_resp.variable;
1495 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1496
f0706e82
JB		 1497 if (!elems.supp_rates) {
1498 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1499 sdata->name);
af6b6374 1500 return false;
f0706e82
JB		 1501 }
1502
46900298 1503 ifmgd->aid = aid;
f0706e82 1504
2a33bee2
GE		 1505 mutex_lock(&sdata->local->sta_mtx);
1506 /*
1507 * station info was already allocated and inserted before
1508 * the association and should be available to us
1509 */
1510 sta = sta_info_get_rx(sdata, cbss->bssid);
1511 if (WARN_ON(!sta)) {
1512 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1513 return false;
77fdaa12 1514 }
05e5e883 1515
5d1ec85f
JB		 1516 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1517 WLAN_STA_ASSOC_AP);
1518 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1519 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1520
60f8b39c
JB		 1521 rates = 0;
1522 basic_rates = 0;
e7480bbb 1523 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1524
60f8b39c
JB		 1525 for (i = 0; i < elems.supp_rates_len; i++) {
1526 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1527 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1528
60f8b39c
JB		 1529 if (rate > 110)
1530 have_higher_than_11mbit = true;
1531
1532 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1533 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1534 rates |= BIT(j);
d61272cb
TW		 1535 if (is_basic)
1536 basic_rates |= BIT(j);
1537 break;
1538 }
f709fc69 1539 }
f709fc69
LCC		 1540 }
1541
60f8b39c
JB		 1542 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1543 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1544 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1545
60f8b39c
JB		 1546 if (rate > 110)
1547 have_higher_than_11mbit = true;
f0706e82 1548
60f8b39c 1549 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1550 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1551 rates |= BIT(j);
d61272cb
TW		 1552 if (is_basic)
1553 basic_rates |= BIT(j);
1554 break;
1555 }
60f8b39c 1556 }
1ebebea8 1557 }
f0706e82 1558
e7480bbb 1559 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1560 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1561
1562 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1563 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1564 have_higher_than_11mbit)
1565 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1566 else
1567 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1568
ab1faead 1569 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1570 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1571 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1572
1573 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1574
4b7679a5 1575 rate_control_rate_init(sta);
f0706e82 1576
46900298 1577 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1578 set_sta_flags(sta, WLAN_STA_MFP);
1579
ddf4ac53 1580 if (elems.wmm_param)
60f8b39c 1581 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1582
2a33bee2
GE		 1583 /* sta_info_reinsert will also unlock the mutex lock */
1584 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1585 sta = NULL;
1586 if (err) {
1587 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1588 " the AP (error %d)\n", sdata->name, err);
90be561b 1589 return false;
ddf4ac53
JB		 1590 }
1591
f2176d72
JO		 1592 /*
1593 * Always handle WMM once after association regardless
1594 * of the first value the AP uses. Setting -1 here has
1595 * that effect because the AP values is an unsigned
1596 * 4-bit value.
1597 */
1598 ifmgd->wmm_last_param_set = -1;
1599
ddf4ac53 1600 if (elems.wmm_param)
4ced3f74 1601 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1602 elems.wmm_param_len);
aa837e1d
JB		 1603 else
1604 ieee80211_set_wmm_default(sdata);
f0706e82 1605
e4da8c37
JB		 1606 local->oper_channel = wk->chan;
1607
ae5eb026 1608 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1609 (sdata->local->hw.queues >= 4) &&
ab1faead 1610 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1611 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1612 cbss->bssid, ap_ht_cap_flags,
1613 false);
ae5eb026 1614
60f8b39c
JB		 1615 /* set AID and assoc capability,
1616 * ieee80211_set_associated() will tell the driver */
1617 bss_conf->aid = aid;
1618 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1619 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1620
d524215f
FF		 1621 /*
1622 * If we're using 4-addr mode, let the AP know that we're
1623 * doing so, so that it can create the STA VLAN on its side
1624 */
1625 if (ifmgd->use_4addr)
1626 ieee80211_send_4addr_nullfunc(local, sdata);
1627
15b7b062 1628 /*
b291ba11
JB		 1629 * Start timer to probe the connection to the AP now.
1630 * Also start the timer that will detect beacon loss.
15b7b062 1631 */
b291ba11 1632 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1633 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1634
af6b6374 1635 return true;
f0706e82
JB		 1636}
1637
1638
98c8fccf
JB		 1639static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1640 struct ieee80211_mgmt *mgmt,
1641 size_t len,
1642 struct ieee80211_rx_status *rx_status,
1643 struct ieee802_11_elems *elems,
1644 bool beacon)
1645{
1646 struct ieee80211_local *local = sdata->local;
1647 int freq;
c2b13452 1648 struct ieee80211_bss *bss;
98c8fccf 1649 struct ieee80211_channel *channel;
56007a02
JB		 1650 bool need_ps = false;
1651
1652 if (sdata->u.mgd.associated) {
1653 bss = (void *)sdata->u.mgd.associated->priv;
1654 /* not previously set so we may need to recalc */
1655 need_ps = !bss->dtim_period;
1656 }
98c8fccf
JB		 1657
1658 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1659 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1660 rx_status->band);
98c8fccf
JB		 1661 else
1662 freq = rx_status->freq;
1663
1664 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1665
1666 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1667 return;
1668
98c8fccf 1669 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1670 channel, beacon);
77fdaa12
JB		 1671 if (bss)
1672 ieee80211_rx_bss_put(local, bss);
1673
1674 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1675 return;
1676
56007a02
JB		 1677 if (need_ps) {
1678 mutex_lock(&local->iflist_mtx);
1679 ieee80211_recalc_ps(local, -1);
1680 mutex_unlock(&local->iflist_mtx);
1681 }
1682
c481ec97 1683 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1684 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1685 ETH_ALEN) == 0)) {
c481ec97
S		 1686 struct ieee80211_channel_sw_ie *sw_elem =
1687 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1688 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1689 bss, rx_status->mactime);
c481ec97 1690 }
f0706e82
JB		 1691}
1692
1693
f698d856 1694static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1695 struct sk_buff *skb)
f0706e82 1696{
af6b6374 1697 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1698 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1699 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1700 size_t baselen, len = skb->len;
ae6a44e3
EK		 1701 struct ieee802_11_elems elems;
1702
15b7b062
KV		 1703 ifmgd = &sdata->u.mgd;
1704
77fdaa12
JB		 1705 ASSERT_MGD_MTX(ifmgd);
1706
47846c9b 1707 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1708 return; /* ignore ProbeResp to foreign address */
1709
ae6a44e3
EK		 1710 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1711 if (baselen > len)
1712 return;
1713
1714 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1715 &elems);
1716
98c8fccf 1717 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1718
77fdaa12 1719 if (ifmgd->associated &&
4e5ff376
FF		 1720 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1721 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1722}
1723
d91f36db
JB		 1724/*
1725 * This is the canonical list of information elements we care about,
1726 * the filter code also gives us all changes to the Microsoft OUI
1727 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1728 *
1729 * We implement beacon filtering in software since that means we can
1730 * avoid processing the frame here and in cfg80211, and userspace
1731 * will not be able to tell whether the hardware supports it or not.
1732 *
1733 * XXX: This list needs to be dynamic -- userspace needs to be able to
1734 * add items it requires. It also needs to be able to tell us to
1735 * look out for other vendor IEs.
1736 */
1737static const u64 care_about_ies =
1d4df3a5
JB		 1738 (1ULL << WLAN_EID_COUNTRY) |
1739 (1ULL << WLAN_EID_ERP_INFO) |
1740 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1741 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1742 (1ULL << WLAN_EID_HT_CAPABILITY) |
1743 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1744
f698d856 1745static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1746 struct ieee80211_mgmt *mgmt,
1747 size_t len,
1748 struct ieee80211_rx_status *rx_status)
1749{
d91f36db 1750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1751 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1752 size_t baselen;
1753 struct ieee802_11_elems elems;
f698d856 1754 struct ieee80211_local *local = sdata->local;
471b3efd 1755 u32 changed = 0;
d91f36db 1756 bool erp_valid, directed_tim = false;
7a5158ef 1757 u8 erp_value = 0;
d91f36db 1758 u32 ncrc;
77fdaa12
JB		 1759 u8 *bssid;
1760
1761 ASSERT_MGD_MTX(ifmgd);
f0706e82 1762
ae6a44e3
EK		 1763 /* Process beacon from the current BSS */
1764 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1765 if (baselen > len)
1766 return;
1767
d91f36db 1768 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1769 return;
f0706e82 1770
b291ba11
JB		 1771 /*
1772 * We might have received a number of frames, among them a
1773 * disassoc frame and a beacon...
1774 */
1775 if (!ifmgd->associated)
77fdaa12
JB		 1776 return;
1777
0c1ad2ca 1778 bssid = ifmgd->associated->bssid;
77fdaa12 1779
b291ba11
JB		 1780 /*
1781 * And in theory even frames from a different AP we were just
1782 * associated to a split-second ago!
1783 */
1784 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1785 return;
1786
17e4ec14
JM		 1787 /* Track average RSSI from the Beacon frames of the current AP */
1788 ifmgd->last_beacon_signal = rx_status->signal;
1789 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1790 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1791 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1792 ifmgd->last_cqm_event_signal = 0;
391a200a 1793 ifmgd->count_beacon_signal = 1;
615f7b9b 1794 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1795 } else {
1796 ifmgd->ave_beacon_signal =
1797 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1798 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1799 ifmgd->ave_beacon_signal) / 16;
391a200a 1800 ifmgd->count_beacon_signal++;
17e4ec14 1801 }
615f7b9b
MV		 1802
1803 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1804 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1805 int sig = ifmgd->ave_beacon_signal;
1806 int last_sig = ifmgd->last_ave_beacon_signal;
1807
1808 /*
1809 * if signal crosses either of the boundaries, invoke callback
1810 * with appropriate parameters
1811 */
1812 if (sig > ifmgd->rssi_max_thold &&
1813 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1814 ifmgd->last_ave_beacon_signal = sig;
1815 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1816 } else if (sig < ifmgd->rssi_min_thold &&
1817 (last_sig >= ifmgd->rssi_max_thold ||
1818 last_sig == 0)) {
1819 ifmgd->last_ave_beacon_signal = sig;
1820 drv_rssi_callback(local, RSSI_EVENT_LOW);
1821 }
1822 }
1823
17e4ec14 1824 if (bss_conf->cqm_rssi_thold &&
391a200a 1825 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1826 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1827 int sig = ifmgd->ave_beacon_signal / 16;
1828 int last_event = ifmgd->last_cqm_event_signal;
1829 int thold = bss_conf->cqm_rssi_thold;
1830 int hyst = bss_conf->cqm_rssi_hyst;
1831 if (sig < thold &&
1832 (last_event == 0 || sig < last_event - hyst)) {
1833 ifmgd->last_cqm_event_signal = sig;
1834 ieee80211_cqm_rssi_notify(
1835 &sdata->vif,
1836 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1837 GFP_KERNEL);
1838 } else if (sig > thold &&
1839 (last_event == 0 || sig > last_event + hyst)) {
1840 ifmgd->last_cqm_event_signal = sig;
1841 ieee80211_cqm_rssi_notify(
1842 &sdata->vif,
1843 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1844 GFP_KERNEL);
1845 }
1846 }
1847
b291ba11 1848 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1849#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1850 if (net_ratelimit()) {
1851 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1852 "to a received beacon\n", sdata->name);
92778180
JM		 1853 }
1854#endif
b291ba11 1855 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1856 mutex_lock(&local->iflist_mtx);
1857 ieee80211_recalc_ps(local, -1);
1858 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1859 }
1860
b291ba11
JB		 1861 /*
1862 * Push the beacon loss detection into the future since
1863 * we are processing a beacon from the AP just now.
1864 */
d3a910a8 1865 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1866
d91f36db
JB		 1867 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1868 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1869 len - baselen, &elems,
1870 care_about_ies, ncrc);
1871
1872 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1873 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1874 ifmgd->aid);
d91f36db 1875
d8ec4433 1876 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1877 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1878 true);
d91f36db 1879
4ced3f74 1880 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1881 elems.wmm_param_len);
1882 }
fe3fa827 1883
25c9c875 1884 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1885 if (directed_tim) {
572e0012
KV		 1886 if (local->hw.conf.dynamic_ps_timeout > 0) {
1887 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1888 ieee80211_hw_config(local,
1889 IEEE80211_CONF_CHANGE_PS);
1890 ieee80211_send_nullfunc(local, sdata, 0);
1891 } else {
1892 local->pspolling = true;
1893
1894 /*
1895 * Here is assumed that the driver will be
1896 * able to send ps-poll frame and receive a
1897 * response even though power save mode is
1898 * enabled, but some drivers might require
1899 * to disable power save here. This needs
1900 * to be investigated.
1901 */
1902 ieee80211_send_pspoll(local, sdata);
1903 }
a97b77b9
VN		 1904 }
1905 }
7a5158ef 1906
d8ec4433 1907 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1908 return;
1909 ifmgd->beacon_crc = ncrc;
d8ec4433 1910 ifmgd->beacon_crc_valid = true;
30196673 1911
7a5158ef
JB		 1912 if (elems.erp_info && elems.erp_info_len >= 1) {
1913 erp_valid = true;
1914 erp_value = elems.erp_info[0];
1915 } else {
1916 erp_valid = false;
50c4afb9 1917 }
7a5158ef
JB		 1918 changed |= ieee80211_handle_bss_capability(sdata,
1919 le16_to_cpu(mgmt->u.beacon.capab_info),
1920 erp_valid, erp_value);
f0706e82 1921
d3c990fb 1922
53d6f81c 1923 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1924 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1925 struct sta_info *sta;
1926 struct ieee80211_supported_band *sband;
1927 u16 ap_ht_cap_flags;
1928
1929 rcu_read_lock();
1930
abe60632 1931 sta = sta_info_get(sdata, bssid);
77fdaa12 1932 if (WARN_ON(!sta)) {
ae5eb026
JB		 1933 rcu_read_unlock();
1934 return;
1935 }
1936
1937 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1938
1939 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1940 elems.ht_cap_elem, &sta->sta.ht_cap);
1941
1942 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1943
1944 rcu_read_unlock();
1945
1946 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 1947 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 1948 }
1949
8b19e6ca 1950 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1951 if (elems.country_elem) {
a8302de9
VT		 1952 /* TODO: IBSS also needs this */
1953 if (elems.pwr_constr_elem)
1954 ieee80211_handle_pwr_constr(sdata,
1955 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1956 elems.pwr_constr_elem,
1957 elems.pwr_constr_elem_len);
3f2355cb
LR		 1958 }
1959
471b3efd 1960 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1961}
1962
1fa57d01
JB		 1963void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1964 struct sk_buff *skb)
f0706e82 1965{
77fdaa12 1966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1967 struct ieee80211_rx_status *rx_status;
f0706e82 1968 struct ieee80211_mgmt *mgmt;
77fdaa12 1969 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1970 u16 fc;
1971
f0706e82
JB		 1972 rx_status = (struct ieee80211_rx_status *) skb->cb;
1973 mgmt = (struct ieee80211_mgmt *) skb->data;
1974 fc = le16_to_cpu(mgmt->frame_control);
1975
77fdaa12
JB		 1976 mutex_lock(&ifmgd->mtx);
1977
1978 if (ifmgd->associated &&
0c1ad2ca 1979 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1980 switch (fc & IEEE80211_FCTL_STYPE) {
1981 case IEEE80211_STYPE_BEACON:
1982 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1983 rx_status);
1984 break;
1985 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1986 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1987 break;
1988 case IEEE80211_STYPE_DEAUTH:
63f170e0 1989 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1990 break;
1991 case IEEE80211_STYPE_DISASSOC:
1992 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1993 break;
1994 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1995 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1996 case WLAN_CATEGORY_SPECTRUM_MGMT:
1997 ieee80211_sta_process_chanswitch(sdata,
1998 &mgmt->u.action.u.chan_switch.sw_elem,
1999 (void *)ifmgd->associated->priv,
2000 rx_status->mactime);
2001 break;
2002 }
77fdaa12
JB		 2003 }
2004 mutex_unlock(&ifmgd->mtx);
2005
2006 switch (rma) {
2007 case RX_MGMT_NONE:
2008 /* no action */
2009 break;
2010 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2011 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2012 break;
2013 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2014 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2015 break;
2016 default:
2017 WARN(1, "unexpected: %d", rma);
2018 }
36b3a628 2019 return;
77fdaa12
JB		 2020 }
2021
77fdaa12
JB		 2022 mutex_unlock(&ifmgd->mtx);
2023
63f170e0 2024 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2025 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2026 struct ieee80211_local *local = sdata->local;
2027 struct ieee80211_work *wk;
2028
a1699b75 2029 mutex_lock(&local->mtx);
b054b747
JB		 2030 list_for_each_entry(wk, &local->work_list, list) {
2031 if (wk->sdata != sdata)
2032 continue;
2033
e5b900d2
JB		 2034 if (wk->type != IEEE80211_WORK_ASSOC &&
2035 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2036 continue;
2037
2038 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2039 continue;
2040 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2041 continue;
2042
2043 /*
2044 * Printing the message only here means we can't
2045 * spuriously print it, but it also means that it
2046 * won't be printed when the frame comes in before
2047 * we even tried to associate or in similar cases.
2048 *
2049 * Ultimately, I suspect cfg80211 should print the
2050 * messages instead.
2051 */
2052 printk(KERN_DEBUG
2053 "%s: deauthenticated from %pM (Reason: %u)\n",
2054 sdata->name, mgmt->bssid,
2055 le16_to_cpu(mgmt->u.deauth.reason_code));
2056
2057 list_del_rcu(&wk->list);
2058 free_work(wk);
2059 break;
2060 }
a1699b75 2061 mutex_unlock(&local->mtx);
f0706e82 2062
ce470613 2063 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2064 }
f0706e82
JB		 2065}
2066
9c6bd790 2067static void ieee80211_sta_timer(unsigned long data)
f0706e82 2068{
60f8b39c
JB		 2069 struct ieee80211_sub_if_data *sdata =
2070 (struct ieee80211_sub_if_data *) data;
46900298 2071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2072 struct ieee80211_local *local = sdata->local;
f0706e82 2073
5bb644a0
JB		 2074 if (local->quiescing) {
2075 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2076 return;
2077 }
2078
64592c8f 2079 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2080}
2081
04ac3c0e 2082static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2083 u8 *bssid, u8 reason)
04ac3c0e
FF		 2084{
2085 struct ieee80211_local *local = sdata->local;
2086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2087
2088 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2089 IEEE80211_STA_BEACON_POLL);
2090
2091 ieee80211_set_disassoc(sdata, true, true);
2092 mutex_unlock(&ifmgd->mtx);
2093 mutex_lock(&local->mtx);
2094 ieee80211_recalc_idle(local);
2095 mutex_unlock(&local->mtx);
2096 /*
2097 * must be outside lock due to cfg80211,
2098 * but that's not a problem.
2099 */
2100 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2101 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2102 NULL, true);
2103 mutex_lock(&ifmgd->mtx);
2104}
2105
1fa57d01 2106void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2107{
9c6bd790 2108 struct ieee80211_local *local = sdata->local;
1fa57d01 2109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2110
77fdaa12
JB		 2111 /* then process the rest of the work */
2112 mutex_lock(&ifmgd->mtx);
2113
b291ba11
JB		 2114 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2115 IEEE80211_STA_CONNECTION_POLL) &&
2116 ifmgd->associated) {
a43abf29 2117 u8 bssid[ETH_ALEN];
72a8a3ed 2118 int max_tries;
a43abf29 2119
0c1ad2ca 2120 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2121
72a8a3ed 2122 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2123 max_tries = max_nullfunc_tries;
72a8a3ed 2124 else
180205bd 2125 max_tries = max_probe_tries;
72a8a3ed 2126
4e5ff376
FF		 2127 /* ACK received for nullfunc probing frame */
2128 if (!ifmgd->probe_send_count)
2129 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2130 else if (ifmgd->nullfunc_failed) {
2131 if (ifmgd->probe_send_count < max_tries) {
2132#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2133 wiphy_debug(local->hw.wiphy,
2134 "%s: No ack for nullfunc frame to"
bfc31df3 2135 " AP %pM, try %d/%i\n",
04ac3c0e 2136 sdata->name, bssid,
bfc31df3 2137 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2138#endif
2139 ieee80211_mgd_probe_ap_send(sdata);
2140 } else {
2141#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2142 wiphy_debug(local->hw.wiphy,
2143 "%s: No ack for nullfunc frame to"
2144 " AP %pM, disconnecting.\n",
c658e5db 2145 sdata->name, bssid);
04ac3c0e 2146#endif
95acac61
JB		 2147 ieee80211_sta_connection_lost(sdata, bssid,
2148 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2149 }
2150 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2151 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2152 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2153#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2154 wiphy_debug(local->hw.wiphy,
2155 "%s: Failed to send nullfunc to AP %pM"
2156 " after %dms, disconnecting.\n",
2157 sdata->name,
180205bd 2158 bssid, probe_wait_ms);
04ac3c0e 2159#endif
95acac61
JB		 2160 ieee80211_sta_connection_lost(sdata, bssid,
2161 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2162 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2163#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2164 wiphy_debug(local->hw.wiphy,
2165 "%s: No probe response from AP %pM"
bfc31df3 2166 " after %dms, try %d/%i\n",
b38afa87 2167 sdata->name,
180205bd 2168 bssid, probe_wait_ms,
bfc31df3 2169 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2170#endif
2171 ieee80211_mgd_probe_ap_send(sdata);
2172 } else {
b291ba11
JB		 2173 /*
2174 * We actually lost the connection ... or did we?
2175 * Let's make sure!
2176 */
b38afa87
BG		 2177 wiphy_debug(local->hw.wiphy,
2178 "%s: No probe response from AP %pM"
2179 " after %dms, disconnecting.\n",
2180 sdata->name,
180205bd 2181 bssid, probe_wait_ms);
04ac3c0e 2182
95acac61
JB		 2183 ieee80211_sta_connection_lost(sdata, bssid,
2184 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2185 }
2186 }
2187
77fdaa12 2188 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2189}
2190
b291ba11
JB		 2191static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2192{
2193 struct ieee80211_sub_if_data *sdata =
2194 (struct ieee80211_sub_if_data *) data;
2195 struct ieee80211_local *local = sdata->local;
2196
2197 if (local->quiescing)
2198 return;
2199
1e4dcd01
JO		 2200 ieee80211_queue_work(&sdata->local->hw,
2201 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2202}
2203
2204static void ieee80211_sta_conn_mon_timer(unsigned long data)
2205{
2206 struct ieee80211_sub_if_data *sdata =
2207 (struct ieee80211_sub_if_data *) data;
2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2209 struct ieee80211_local *local = sdata->local;
2210
2211 if (local->quiescing)
2212 return;
2213
42935eca 2214 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2215}
2216
2217static void ieee80211_sta_monitor_work(struct work_struct *work)
2218{
2219 struct ieee80211_sub_if_data *sdata =
2220 container_of(work, struct ieee80211_sub_if_data,
2221 u.mgd.monitor_work);
2222
2223 ieee80211_mgd_probe_ap(sdata, false);
2224}
2225
9c6bd790
JB		 2226static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2227{
ad935687 2228 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2229 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2230 IEEE80211_STA_CONNECTION_POLL);
ad935687 2231
b291ba11 2232 /* let's probe the connection once */
42935eca 2233 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2234 &sdata->u.mgd.monitor_work);
2235 /* and do all the other regular work too */
64592c8f 2236 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2237 }
9c6bd790 2238}
f0706e82 2239
5bb644a0
JB		 2240#ifdef CONFIG_PM
2241void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2242{
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2244
2245 /*
2246 * we need to use atomic bitops for the running bits
2247 * only because both timers might fire at the same
2248 * time -- the code here is properly synchronised.
2249 */
2250
d1f5b7a3
JB		 2251 cancel_work_sync(&ifmgd->request_smps_work);
2252
1e4dcd01 2253 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2254 if (del_timer_sync(&ifmgd->timer))
2255 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2256
2257 cancel_work_sync(&ifmgd->chswitch_work);
2258 if (del_timer_sync(&ifmgd->chswitch_timer))
2259 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2260
2261 cancel_work_sync(&ifmgd->monitor_work);
2262 /* these will just be re-established on connection */
2263 del_timer_sync(&ifmgd->conn_mon_timer);
2264 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2265}
2266
2267void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2268{
2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2270
676b58c2
RM		 2271 if (!ifmgd->associated)
2272 return;
2273
95acac61
JB		 2274 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2275 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2276 mutex_lock(&ifmgd->mtx);
2277 if (ifmgd->associated) {
2278#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2279 wiphy_debug(sdata->local->hw.wiphy,
2280 "%s: driver requested disconnect after resume.\n",
2281 sdata->name);
2282#endif
2283 ieee80211_sta_connection_lost(sdata,
2284 ifmgd->associated->bssid,
2285 WLAN_REASON_UNSPECIFIED);
2286 mutex_unlock(&ifmgd->mtx);
2287 return;
2288 }
2289 mutex_unlock(&ifmgd->mtx);
2290 }
2291
5bb644a0
JB		 2292 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2293 add_timer(&ifmgd->timer);
2294 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2295 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2296 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2297 ieee80211_restart_sta_timer(sdata);
a6af1d84 2298 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2299}
2300#endif
2301
9c6bd790
JB		 2302/* interface setup */
2303void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2304{
46900298 2305 struct ieee80211_if_managed *ifmgd;
988c0f72 2306
46900298 2307 ifmgd = &sdata->u.mgd;
b291ba11 2308 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2309 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2310 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2311 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2312 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2313 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2314 (unsigned long) sdata);
b291ba11
JB		 2315 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2316 (unsigned long) sdata);
2317 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2318 (unsigned long) sdata);
46900298 2319 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2320 (unsigned long) sdata);
9c6bd790 2321
ab1faead 2322 ifmgd->flags = 0;
bbbdff9e 2323
77fdaa12 2324 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2325
2326 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2327 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2328 else
2329 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2330}
2331
77fdaa12
JB		 2332/* scan finished notification */
2333void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2334{
77fdaa12 2335 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2336
77fdaa12
JB		 2337 /* Restart STA timers */
2338 rcu_read_lock();
2339 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2340 ieee80211_restart_sta_timer(sdata);
2341 rcu_read_unlock();
2342}
60f8b39c 2343
77fdaa12
JB		 2344int ieee80211_max_network_latency(struct notifier_block *nb,
2345 unsigned long data, void *dummy)
2346{
2347 s32 latency_usec = (s32) data;
2348 struct ieee80211_local *local =
2349 container_of(nb, struct ieee80211_local,
2350 network_latency_notifier);
1fa6f4af 2351
77fdaa12
JB		 2352 mutex_lock(&local->iflist_mtx);
2353 ieee80211_recalc_ps(local, latency_usec);
2354 mutex_unlock(&local->iflist_mtx);
dfe67012 2355
77fdaa12 2356 return 0;
9c6bd790
JB		 2357}
2358
77fdaa12 2359/* config hooks */
af6b6374
JB		 2360static enum work_done_result
2361ieee80211_probe_auth_done(struct ieee80211_work *wk,
2362 struct sk_buff *skb)
2363{
b2abb6e2
JB		 2364 struct ieee80211_local *local = wk->sdata->local;
2365
af6b6374
JB		 2366 if (!skb) {
2367 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2368 goto destroy;
af6b6374
JB		 2369 }
2370
2371 if (wk->type == IEEE80211_WORK_AUTH) {
2372 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2373 goto destroy;
af6b6374
JB		 2374 }
2375
2376 mutex_lock(&wk->sdata->u.mgd.mtx);
2377 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2378 mutex_unlock(&wk->sdata->u.mgd.mtx);
2379
2380 wk->type = IEEE80211_WORK_AUTH;
2381 wk->probe_auth.tries = 0;
2382 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2383 destroy:
2384 if (wk->probe_auth.synced)
2385 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2386 IEEE80211_TX_SYNC_AUTH);
2387
2388 return WORK_DONE_DESTROY;
af6b6374
JB		 2389}
2390
77fdaa12
JB		 2391int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2392 struct cfg80211_auth_request *req)
9c6bd790 2393{
77fdaa12 2394 const u8 *ssid;
f679f65d 2395 struct ieee80211_work *wk;
77fdaa12 2396 u16 auth_alg;
9c6bd790 2397
d5cdfacb
JM		 2398 if (req->local_state_change)
2399 return 0; /* no need to update mac80211 state */
2400
77fdaa12
JB		 2401 switch (req->auth_type) {
2402 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2403 auth_alg = WLAN_AUTH_OPEN;
2404 break;
2405 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2406 if (IS_ERR(sdata->local->wep_tx_tfm))
2407 return -EOPNOTSUPP;
77fdaa12
JB		 2408 auth_alg = WLAN_AUTH_SHARED_KEY;
2409 break;
2410 case NL80211_AUTHTYPE_FT:
2411 auth_alg = WLAN_AUTH_FT;
2412 break;
2413 case NL80211_AUTHTYPE_NETWORK_EAP:
2414 auth_alg = WLAN_AUTH_LEAP;
2415 break;
2416 default:
2417 return -EOPNOTSUPP;
60f8b39c 2418 }
77fdaa12
JB		 2419
2420 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2421 if (!wk)
9c6bd790 2422 return -ENOMEM;
77fdaa12 2423
5e124bd5 2424 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2425
2426 if (req->ie && req->ie_len) {
2427 memcpy(wk->ie, req->ie, req->ie_len);
2428 wk->ie_len = req->ie_len;
9c6bd790 2429 }
77fdaa12 2430
fffd0934 2431 if (req->key && req->key_len) {
af6b6374
JB		 2432 wk->probe_auth.key_len = req->key_len;
2433 wk->probe_auth.key_idx = req->key_idx;
2434 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2435 }
2436
77fdaa12 2437 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2438 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2439 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2440
af6b6374
JB		 2441 wk->probe_auth.algorithm = auth_alg;
2442 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2443
070bb547
JB		 2444 /* if we already have a probe, don't probe again */
2445 if (req->bss->proberesp_ies)
2446 wk->type = IEEE80211_WORK_AUTH;
2447 else
2448 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2449 wk->chan = req->bss->channel;
4d51e149 2450 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2451 wk->sdata = sdata;
2452 wk->done = ieee80211_probe_auth_done;
77fdaa12 2453
af6b6374 2454 ieee80211_add_work(wk);
9c6bd790 2455 return 0;
60f8b39c
JB		 2456}
2457
2a33bee2
GE		 2458/* create and insert a dummy station entry */
2459static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2460 u8 *bssid) {
2461 struct sta_info *sta;
2462 int err;
2463
2464 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2465 if (!sta)
2a33bee2 2466 return -ENOMEM;
2a33bee2
GE		 2467
2468 sta->dummy = true;
2469
2470 err = sta_info_insert(sta);
2471 sta = NULL;
2472 if (err) {
2473 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2474 " the AP (error %d)\n", sdata->name, err);
2475 return err;
2476 }
2477
2478 return 0;
2479}
2480
af6b6374
JB		 2481static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2482 struct sk_buff *skb)
2483{
b2abb6e2 2484 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2485 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2486 struct ieee80211_rx_status *rx_status;
2487 struct ieee802_11_elems elems;
2a33bee2 2488 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2489 u16 status;
2490
2491 if (!skb) {
2a33bee2 2492 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2493 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2494 goto destroy;
af6b6374
JB		 2495 }
2496
e5b900d2
JB		 2497 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2498 mutex_lock(&wk->sdata->u.mgd.mtx);
2499 rx_status = (void *) skb->cb;
2500 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2501 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2502 &elems, true);
2503 mutex_unlock(&wk->sdata->u.mgd.mtx);
2504
2505 wk->type = IEEE80211_WORK_ASSOC;
2506 /* not really done yet */
2507 return WORK_DONE_REQUEUE;
2508 }
2509
af6b6374
JB		 2510 mgmt = (void *)skb->data;
2511 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2512
2513 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2514 if (wk->assoc.synced)
2515 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2516 IEEE80211_TX_SYNC_ASSOC);
2517
af6b6374
JB		 2518 mutex_lock(&wk->sdata->u.mgd.mtx);
2519 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2520 mutex_unlock(&wk->sdata->u.mgd.mtx);
2521 /* oops -- internal error -- send timeout for now */
2a33bee2 2522 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2523 cfg80211_send_assoc_timeout(wk->sdata->dev,
2524 wk->filter_ta);
2525 return WORK_DONE_DESTROY;
2526 }
68542962
JO		 2527
2528 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2529 } else {
2530 /* assoc failed - destroy the dummy station entry */
2531 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2532 }
2533
2534 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2535 destroy:
2536 if (wk->assoc.synced)
2537 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2538 IEEE80211_TX_SYNC_ASSOC);
2539
af6b6374
JB		 2540 return WORK_DONE_DESTROY;
2541}
2542
77fdaa12
JB		 2543int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2544 struct cfg80211_assoc_request *req)
f0706e82 2545{
77fdaa12 2546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2547 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2548 struct ieee80211_work *wk;
63f170e0 2549 const u8 *ssid;
2a33bee2 2550 int i, err;
f0706e82 2551
77fdaa12 2552 mutex_lock(&ifmgd->mtx);
af6b6374 2553 if (ifmgd->associated) {
9c87ba67
JM		 2554 if (!req->prev_bssid ||
2555 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2556 ETH_ALEN)) {
2557 /*
2558 * We are already associated and the request was not a
2559 * reassociation request from the current BSS, so
2560 * reject it.
2561 */
2562 mutex_unlock(&ifmgd->mtx);
2563 return -EALREADY;
2564 }
2565
2566 /* Trying to reassociate - clear previous association state */
53f73c09 2567 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2568 }
2569 mutex_unlock(&ifmgd->mtx);
77fdaa12 2570
63f170e0 2571 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2572 if (!wk)
2573 return -ENOMEM;
77fdaa12 2574
2a33bee2
GE		 2575 /*
2576 * create a dummy station info entry in order
2577 * to start accepting incoming EAPOL packets from the station
2578 */
2579 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2580 if (err) {
2581 kfree(wk);
2582 return err;
2583 }
2584
77fdaa12 2585 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2586 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2587
d8ec4433
JO		 2588 ifmgd->beacon_crc_valid = false;
2589
77fdaa12
JB		 2590 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2591 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2592 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2593 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2594 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2595
77fdaa12
JB		 2596
2597 if (req->ie && req->ie_len) {
2598 memcpy(wk->ie, req->ie, req->ie_len);
2599 wk->ie_len = req->ie_len;
2600 } else
2601 wk->ie_len = 0;
2602
0c1ad2ca 2603 wk->assoc.bss = req->bss;
f679f65d 2604
af6b6374 2605 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2606
af6b6374
JB		 2607 /* new association always uses requested smps mode */
2608 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2609 if (ifmgd->powersave)
2610 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2611 else
2612 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2613 } else
2614 ifmgd->ap_smps = ifmgd->req_smps;
2615
2616 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2617 /*
2618 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2619 * We still associate in non-HT mode (11a/b/g) if any one of these
2620 * ciphers is configured as pairwise.
2621 * We can set this to true for non-11n hardware, that'll be checked
2622 * separately along with the peer capabilities.
2623 */
af6b6374 2624 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2625 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2626 wk->assoc.wmm_used = bss->wmm_used;
2627 wk->assoc.supp_rates = bss->supp_rates;
2628 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2629 wk->assoc.ht_information_ie =
2630 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2631
ab13315a
KV		 2632 if (bss->wmm_used && bss->uapsd_supported &&
2633 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2634 wk->assoc.uapsd_used = true;
2635 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2636 } else {
2637 wk->assoc.uapsd_used = false;
2638 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2639 }
2640
63f170e0 2641 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2642 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2643 wk->assoc.ssid_len = ssid[1];
63f170e0 2644
77fdaa12 2645 if (req->prev_bssid)
f679f65d 2646 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2647
f679f65d 2648 wk->chan = req->bss->channel;
4d51e149 2649 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2650 wk->sdata = sdata;
2651 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2652 if (!bss->dtim_period &&
2653 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2654 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2655 else
2656 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2657
2658 if (req->use_mfp) {
2659 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2660 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2661 } else {
2662 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2663 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2664 }
2665
2666 if (req->crypto.control_port)
2667 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2668 else
2669 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2670
a621fa4d
JB		 2671 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2672 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2673
af6b6374
JB		 2674 ieee80211_add_work(wk);
2675 return 0;
f0706e82
JB		 2676}
2677
77fdaa12 2678int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2679 struct cfg80211_deauth_request *req,
2680 void *cookie)
f0706e82 2681{
af6b6374 2682 struct ieee80211_local *local = sdata->local;
46900298 2683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2684 struct ieee80211_work *wk;
05e48e8e
JM		 2685 u8 bssid[ETH_ALEN];
2686 bool assoc_bss = false;
f0706e82 2687
77fdaa12
JB		 2688 mutex_lock(&ifmgd->mtx);
2689
05e48e8e 2690 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2691 if (ifmgd->associated == req->bss) {
53f73c09 2692 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2693 mutex_unlock(&ifmgd->mtx);
05e48e8e 2694 assoc_bss = true;
af6b6374
JB		 2695 } else {
2696 bool not_auth_yet = false;
f0706e82 2697
a58ce43f 2698 mutex_unlock(&ifmgd->mtx);
a58ce43f 2699
a1699b75 2700 mutex_lock(&local->mtx);
af6b6374 2701 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2702 if (wk->sdata != sdata)
af6b6374 2703 continue;
29165e4c
JB		 2704
2705 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2706 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2707 wk->type != IEEE80211_WORK_ASSOC &&
2708 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2709 continue;
2710
af6b6374
JB		 2711 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2712 continue;
29165e4c
JB		 2713
2714 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2715 list_del_rcu(&wk->list);
af6b6374
JB		 2716 free_work(wk);
2717 break;
2718 }
a1699b75 2719 mutex_unlock(&local->mtx);
af6b6374
JB		 2720
2721 /*
2722 * If somebody requests authentication and we haven't
2723 * sent out an auth frame yet there's no need to send
2724 * out a deauth frame either. If the state was PROBE,
2725 * then this is the case. If it's AUTH we have sent a
2726 * frame, and if it's IDLE we have completed the auth
2727 * process already.
2728 */
2729 if (not_auth_yet) {
2730 __cfg80211_auth_canceled(sdata->dev, bssid);
2731 return 0;
2732 }
2733 }
77fdaa12 2734
0ff71613 2735 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2736 sdata->name, bssid, req->reason_code);
0ff71613 2737
d5cdfacb
JM		 2738 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2739 req->reason_code, cookie,
2740 !req->local_state_change);
05e48e8e 2741 if (assoc_bss)
07ba55d7 2742 sta_info_flush(sdata->local, sdata);
f0706e82 2743
7da7cc1d 2744 mutex_lock(&sdata->local->mtx);
bc83b681 2745 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2746 mutex_unlock(&sdata->local->mtx);
bc83b681 2747
f0706e82
JB		 2748 return 0;
2749}
84363e6e 2750
77fdaa12 2751int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2752 struct cfg80211_disassoc_request *req,
2753 void *cookie)
9c6bd790 2754{
77fdaa12 2755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2756 u8 bssid[ETH_ALEN];
9c6bd790 2757
77fdaa12 2758 mutex_lock(&ifmgd->mtx);
10f644a4 2759
8d8b261a
JB		 2760 /*
2761 * cfg80211 should catch this ... but it's racy since
2762 * we can receive a disassoc frame, process it, hand it
2763 * to cfg80211 while that's in a locked section already
2764 * trying to tell us that the user wants to disconnect.
2765 */
0c1ad2ca 2766 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2767 mutex_unlock(&ifmgd->mtx);
2768 return -ENOLINK;
2769 }
2770
0ff71613 2771 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2772 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2773
e69e95db 2774 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2775 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2776
2777 mutex_unlock(&ifmgd->mtx);
10f644a4 2778
77fdaa12 2779 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2780 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2781 cookie, !req->local_state_change);
07ba55d7 2782 sta_info_flush(sdata->local, sdata);
bc83b681 2783
7da7cc1d 2784 mutex_lock(&sdata->local->mtx);
bc83b681 2785 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2786 mutex_unlock(&sdata->local->mtx);
bc83b681 2787
10f644a4
JB		 2788 return 0;
2789}
026331c4 2790
a97c13c3
JO		 2791void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2792 enum nl80211_cqm_rssi_threshold_event rssi_event,
2793 gfp_t gfp)
2794{
2795 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2796
b5878a2d
JB		 2797 trace_api_cqm_rssi_notify(sdata, rssi_event);
2798
a97c13c3
JO		 2799 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2800}
2801EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2802
2803unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2804{
2805 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2806 return sdata->dev->operstate;
2807}
2808EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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