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cfg80211: export cfg80211_ref_bss
[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>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
180205bd
BG		 33static int max_nullfunc_tries = 2;
34module_param(max_nullfunc_tries, int, 0644);
35MODULE_PARM_DESC(max_nullfunc_tries,
36 "Maximum nullfunc tx tries before disconnecting (reason 4).");
37
38static int max_probe_tries = 5;
39module_param(max_probe_tries, int, 0644);
40MODULE_PARM_DESC(max_probe_tries,
41 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 42
43/*
7ccc8bd7
FF		 44 * Beacon loss timeout is calculated as N frames times the
45 * advertised beacon interval. This may need to be somewhat
46 * higher than what hardware might detect to account for
47 * delays in the host processing frames. But since we also
48 * probe on beacon miss before declaring the connection lost
49 * default to what we want.
b291ba11 50 */
7ccc8bd7
FF		 51#define IEEE80211_BEACON_LOSS_COUNT 7
52
b291ba11
JB		 53/*
54 * Time the connection can be idle before we probe
55 * it to see if we can still talk to the AP.
56 */
d1c5091f 57#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 58/*
59 * Time we wait for a probe response after sending
60 * a probe request because of beacon loss or for
61 * checking the connection still works.
62 */
180205bd
BG		 63static int probe_wait_ms = 500;
64module_param(probe_wait_ms, int, 0644);
65MODULE_PARM_DESC(probe_wait_ms,
66 "Maximum time(ms) to wait for probe response"
67 " before disconnecting (reason 4).");
f0706e82 68
17e4ec14
JM		 69/*
70 * Weight given to the latest Beacon frame when calculating average signal
71 * strength for Beacon frames received in the current BSS. This must be
72 * between 1 and 15.
73 */
74#define IEEE80211_SIGNAL_AVE_WEIGHT 3
75
391a200a
JM		 76/*
77 * How many Beacon frames need to have been used in average signal strength
78 * before starting to indicate signal change events.
79 */
80#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
81
5bb644a0
JB		 82#define TMR_RUNNING_TIMER 0
83#define TMR_RUNNING_CHANSW 1
84
77fdaa12
JB		 85/*
86 * All cfg80211 functions have to be called outside a locked
87 * section so that they can acquire a lock themselves... This
88 * is much simpler than queuing up things in cfg80211, but we
89 * do need some indirection for that here.
90 */
91enum rx_mgmt_action {
92 /* no action required */
93 RX_MGMT_NONE,
94
77fdaa12
JB		 95 /* caller must call cfg80211_send_deauth() */
96 RX_MGMT_CFG80211_DEAUTH,
97
98 /* caller must call cfg80211_send_disassoc() */
99 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 100};
101
5484e237 102/* utils */
77fdaa12
JB		 103static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
104{
46a5ebaf 105 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 106}
107
ca386f31
JB		 108/*
109 * We can have multiple work items (and connection probing)
110 * scheduling this timer, but we need to take care to only
111 * reschedule it when it should fire _earlier_ than it was
112 * asked for before, or if it's not pending right now. This
113 * function ensures that. Note that it then is required to
114 * run this function for all timeouts after the first one
115 * has happened -- the work that runs from this timer will
116 * do that.
117 */
118static void run_again(struct ieee80211_if_managed *ifmgd,
119 unsigned long timeout)
120{
121 ASSERT_MGD_MTX(ifmgd);
122
123 if (!timer_pending(&ifmgd->timer) ||
124 time_before(timeout, ifmgd->timer.expires))
125 mod_timer(&ifmgd->timer, timeout);
126}
127
d3a910a8 128void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 129{
c1288b12 130 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 131 return;
132
133 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 134 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 135}
136
be099e82
LR		 137void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
138{
0c699c3a
LR		 139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
140
8628172f
SG		 141 if (unlikely(!sdata->u.mgd.associated))
142 return;
143
be099e82
LR		 144 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
145 return;
146
147 mod_timer(&sdata->u.mgd.conn_mon_timer,
148 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 149
150 ifmgd->probe_send_count = 0;
be099e82
LR		 151}
152
5484e237 153static int ecw2cw(int ecw)
60f8b39c 154{
5484e237 155 return (1 << ecw) - 1;
60f8b39c
JB		 156}
157
d5522e03
JB		 158/*
159 * ieee80211_enable_ht should be called only after the operating band
160 * has been determined as ht configuration depends on the hw's
161 * HT abilities for a specific band.
162 */
163static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
164 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 165 const u8 *bssid, u16 ap_ht_cap_flags,
166 bool beacon_htcap_ie)
d5522e03
JB		 167{
168 struct ieee80211_local *local = sdata->local;
169 struct ieee80211_supported_band *sband;
d5522e03
JB		 170 struct sta_info *sta;
171 u32 changed = 0;
172710bf 172 int hti_cfreq;
9ed6bcce 173 u16 ht_opmode;
0aaffa9b
JB		 174 bool enable_ht = true;
175 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 176 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
177
178 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
179
0aaffa9b
JB		 180 prev_chantype = sdata->vif.bss_conf.channel_type;
181
d5522e03
JB		 182 /* HT is not supported */
183 if (!sband->ht_cap.ht_supported)
184 enable_ht = false;
185
172710bf
BG		 186 if (enable_ht) {
187 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
188 sband->band);
189 /* check that channel matches the right operating channel */
190 if (local->hw.conf.channel->center_freq != hti_cfreq) {
191 /* Some APs mess this up, evidently.
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel, for instance.
194 */
195 printk(KERN_DEBUG
196 "%s: Wrong control channel in association"
197 " response: configured center-freq: %d"
198 " hti-cfreq: %d hti->control_chan: %d"
199 " band: %d. Disabling HT.\n",
200 sdata->name,
201 local->hw.conf.channel->center_freq,
202 hti_cfreq, hti->control_chan,
203 sband->band);
204 enable_ht = false;
205 }
206 }
d5522e03
JB		 207
208 if (enable_ht) {
209 channel_type = NL80211_CHAN_HT20;
210
211 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
ef96a842 212 !ieee80111_cfg_override_disables_ht40(sdata) &&
d5522e03
JB		 213 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
214 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
215 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
216 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 217 if (!(local->hw.conf.channel->flags &
218 IEEE80211_CHAN_NO_HT40PLUS))
219 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 220 break;
221 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 222 if (!(local->hw.conf.channel->flags &
223 IEEE80211_CHAN_NO_HT40MINUS))
224 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 225 break;
226 }
227 }
228 }
229
fe6f212c
RC		 230 if (local->tmp_channel)
231 local->tmp_channel_type = channel_type;
d5522e03 232
0aaffa9b
JB		 233 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
234 /* can only fail due to HT40+/- mismatch */
235 channel_type = NL80211_CHAN_HT20;
236 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
237 }
d5522e03 238
7cc44ed4
RM		 239 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
240 /*
241 * Whenever the AP announces the HT mode change that can be
242 * 40MHz intolerant or etc., it would be safer to stop tx
243 * queues before doing hw config to avoid buffer overflow.
244 */
245 ieee80211_stop_queues_by_reason(&sdata->local->hw,
246 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
247
248 /* flush out all packets */
249 synchronize_net();
250
251 drv_flush(local, false);
252 }
253
0aaffa9b
JB		 254 /* channel_type change automatically detected */
255 ieee80211_hw_config(local, 0);
d5522e03 256
0aaffa9b 257 if (prev_chantype != channel_type) {
d5522e03 258 rcu_read_lock();
abe60632 259 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 260 if (sta)
261 rate_control_rate_update(local, sband, sta,
4fa00437 262 IEEE80211_RC_HT_CHANGED,
0aaffa9b 263 channel_type);
d5522e03 264 rcu_read_unlock();
7cc44ed4
RM		 265
266 if (beacon_htcap_ie)
267 ieee80211_wake_queues_by_reason(&sdata->local->hw,
268 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 269 }
d5522e03 270
9ed6bcce 271 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 272
273 /* if bss configuration changed store the new one */
0aaffa9b
JB		 274 if (sdata->ht_opmode_valid != enable_ht ||
275 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
276 prev_chantype != channel_type) {
d5522e03 277 changed |= BSS_CHANGED_HT;
9ed6bcce 278 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 279 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 280 }
281
282 return changed;
283}
284
9c6bd790
JB		 285/* frame sending functions */
286
ef422bc0 287static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 288 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 289 void *cookie, bool send_frame)
9ac19a90
JB		 290{
291 struct ieee80211_local *local = sdata->local;
46900298 292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 293 struct sk_buff *skb;
294 struct ieee80211_mgmt *mgmt;
9aed3cc1 295
65fc73ac 296 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 297 if (!skb)
9ac19a90 298 return;
d15b8459 299
9ac19a90
JB		 300 skb_reserve(skb, local->hw.extra_tx_headroom);
301
302 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
303 memset(mgmt, 0, 24);
77fdaa12 304 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 305 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 306 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 307 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 308 skb_put(skb, 2);
ef422bc0 309 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 310 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
311
53b46b84 312 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 313 if (cookie)
314 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
315 else
316 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 317 else
ce470613
HS		 318 if (cookie)
319 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
320 else
321 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 322 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
323 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 324
325 if (send_frame)
326 ieee80211_tx_skb(sdata, skb);
327 else
328 kfree_skb(skb);
9ac19a90
JB		 329}
330
572e0012
KV		 331void ieee80211_send_pspoll(struct ieee80211_local *local,
332 struct ieee80211_sub_if_data *sdata)
333{
572e0012
KV		 334 struct ieee80211_pspoll *pspoll;
335 struct sk_buff *skb;
572e0012 336
d8cd189e
KV		 337 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
338 if (!skb)
572e0012 339 return;
572e0012 340
d8cd189e
KV		 341 pspoll = (struct ieee80211_pspoll *) skb->data;
342 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 343
62ae67be
JB		 344 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
345 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 346}
347
965bedad
JB		 348void ieee80211_send_nullfunc(struct ieee80211_local *local,
349 struct ieee80211_sub_if_data *sdata,
350 int powersave)
351{
352 struct sk_buff *skb;
d8cd189e 353 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 355
d8cd189e
KV		 356 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
357 if (!skb)
965bedad 358 return;
965bedad 359
d8cd189e 360 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 361 if (powersave)
d8cd189e 362 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 363
62ae67be 364 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 365 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
366 IEEE80211_STA_CONNECTION_POLL))
367 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
368
62ae67be 369 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 370}
371
d524215f
FF		 372static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
373 struct ieee80211_sub_if_data *sdata)
374{
375 struct sk_buff *skb;
376 struct ieee80211_hdr *nullfunc;
377 __le16 fc;
378
379 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
380 return;
381
382 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 383 if (!skb)
d524215f 384 return;
d15b8459 385
d524215f
FF		 386 skb_reserve(skb, local->hw.extra_tx_headroom);
387
388 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
389 memset(nullfunc, 0, 30);
390 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
391 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
392 nullfunc->frame_control = fc;
393 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
394 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
395 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
396 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
397
398 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
399 ieee80211_tx_skb(sdata, skb);
400}
401
cc32abd4
JB		 402/* spectrum management related things */
403static void ieee80211_chswitch_work(struct work_struct *work)
404{
405 struct ieee80211_sub_if_data *sdata =
406 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
408
9607e6b6 409 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 410 return;
411
77fdaa12
JB		 412 mutex_lock(&ifmgd->mtx);
413 if (!ifmgd->associated)
414 goto out;
cc32abd4
JB		 415
416 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 417 if (!sdata->local->ops->channel_switch) {
418 /* call "hw_config" only if doing sw channel switch */
419 ieee80211_hw_config(sdata->local,
420 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 421 } else {
422 /* update the device channel directly */
423 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 424 }
77fdaa12 425
cc32abd4 426 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 427 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 428
cc32abd4
JB		 429 ieee80211_wake_queues_by_reason(&sdata->local->hw,
430 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 431 out:
432 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
433 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 434}
435
5ce6e438
JB		 436void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
437{
438 struct ieee80211_sub_if_data *sdata;
439 struct ieee80211_if_managed *ifmgd;
440
441 sdata = vif_to_sdata(vif);
442 ifmgd = &sdata->u.mgd;
443
444 trace_api_chswitch_done(sdata, success);
445 if (!success) {
446 /*
447 * If the channel switch was not successful, stay
448 * around on the old channel. We currently lack
449 * good handling of this situation, possibly we
450 * should just drop the association.
451 */
452 sdata->local->csa_channel = sdata->local->oper_channel;
453 }
454
455 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
456}
457EXPORT_SYMBOL(ieee80211_chswitch_done);
458
cc32abd4
JB		 459static void ieee80211_chswitch_timer(unsigned long data)
460{
461 struct ieee80211_sub_if_data *sdata =
462 (struct ieee80211_sub_if_data *) data;
463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
464
5bb644a0
JB		 465 if (sdata->local->quiescing) {
466 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
467 return;
468 }
469
42935eca 470 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 471}
472
473void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
474 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 475 struct ieee80211_bss *bss,
476 u64 timestamp)
cc32abd4 477{
0c1ad2ca
JB		 478 struct cfg80211_bss *cbss =
479 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 480 struct ieee80211_channel *new_ch;
481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 482 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
483 cbss->channel->band);
cc32abd4 484
77fdaa12
JB		 485 ASSERT_MGD_MTX(ifmgd);
486
487 if (!ifmgd->associated)
cc32abd4
JB		 488 return;
489
fbe9c429 490 if (sdata->local->scanning)
cc32abd4
JB		 491 return;
492
493 /* Disregard subsequent beacons if we are already running a timer
494 processing a CSA */
495
496 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
497 return;
498
499 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
500 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
501 return;
502
503 sdata->local->csa_channel = new_ch;
504
5ce6e438
JB		 505 if (sdata->local->ops->channel_switch) {
506 /* use driver's channel switch callback */
507 struct ieee80211_channel_switch ch_switch;
508 memset(&ch_switch, 0, sizeof(ch_switch));
509 ch_switch.timestamp = timestamp;
510 if (sw_elem->mode) {
511 ch_switch.block_tx = true;
512 ieee80211_stop_queues_by_reason(&sdata->local->hw,
513 IEEE80211_QUEUE_STOP_REASON_CSA);
514 }
515 ch_switch.channel = new_ch;
516 ch_switch.count = sw_elem->count;
517 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
518 drv_channel_switch(sdata->local, &ch_switch);
519 return;
520 }
521
522 /* channel switch handled in software */
cc32abd4 523 if (sw_elem->count <= 1) {
42935eca 524 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 525 } else {
9feaddc7
WYG		 526 if (sw_elem->mode)
527 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 528 IEEE80211_QUEUE_STOP_REASON_CSA);
529 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
530 mod_timer(&ifmgd->chswitch_timer,
531 jiffies +
532 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 533 cbss->beacon_interval));
cc32abd4
JB		 534 }
535}
536
537static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
538 u16 capab_info, u8 *pwr_constr_elem,
539 u8 pwr_constr_elem_len)
540{
541 struct ieee80211_conf *conf = &sdata->local->hw.conf;
542
543 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
544 return;
545
546 /* Power constraint IE length should be 1 octet */
547 if (pwr_constr_elem_len != 1)
548 return;
549
a48b13ac 550 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 551 (*pwr_constr_elem != sdata->local->power_constr_level)) {
552 sdata->local->power_constr_level = *pwr_constr_elem;
553 ieee80211_hw_config(sdata->local, 0);
554 }
555}
556
f90754c1
JO		 557void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
558{
559 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
560 struct ieee80211_local *local = sdata->local;
561 struct ieee80211_conf *conf = &local->hw.conf;
562
563 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
564 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
565 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
566
567 local->disable_dynamic_ps = false;
568 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
569}
570EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
571
572void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
573{
574 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
575 struct ieee80211_local *local = sdata->local;
576 struct ieee80211_conf *conf = &local->hw.conf;
577
578 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
579 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
580 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
581
582 local->disable_dynamic_ps = true;
583 conf->dynamic_ps_timeout = 0;
584 del_timer_sync(&local->dynamic_ps_timer);
585 ieee80211_queue_work(&local->hw,
586 &local->dynamic_ps_enable_work);
587}
588EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
589
965bedad
JB		 590/* powersave */
591static void ieee80211_enable_ps(struct ieee80211_local *local,
592 struct ieee80211_sub_if_data *sdata)
593{
594 struct ieee80211_conf *conf = &local->hw.conf;
595
d5edaedc
JB		 596 /*
597 * If we are scanning right now then the parameters will
598 * take effect when scan finishes.
599 */
fbe9c429 600 if (local->scanning)
d5edaedc
JB		 601 return;
602
965bedad
JB		 603 if (conf->dynamic_ps_timeout > 0 &&
604 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
605 mod_timer(&local->dynamic_ps_timer, jiffies +
606 msecs_to_jiffies(conf->dynamic_ps_timeout));
607 } else {
608 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
609 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 610
2a13052f
JO		 611 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
612 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
613 return;
614
615 conf->flags |= IEEE80211_CONF_PS;
616 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 617 }
618}
619
620static void ieee80211_change_ps(struct ieee80211_local *local)
621{
622 struct ieee80211_conf *conf = &local->hw.conf;
623
624 if (local->ps_sdata) {
965bedad
JB		 625 ieee80211_enable_ps(local, local->ps_sdata);
626 } else if (conf->flags & IEEE80211_CONF_PS) {
627 conf->flags &= ~IEEE80211_CONF_PS;
628 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
629 del_timer_sync(&local->dynamic_ps_timer);
630 cancel_work_sync(&local->dynamic_ps_enable_work);
631 }
632}
633
808118cb
JY		 634static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
635{
636 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
637 struct sta_info *sta = NULL;
c2c98fde 638 bool authorized = false;
808118cb
JY		 639
640 if (!mgd->powersave)
641 return false;
642
05cb9108
JB		 643 if (mgd->broken_ap)
644 return false;
645
808118cb
JY		 646 if (!mgd->associated)
647 return false;
648
649 if (!mgd->associated->beacon_ies)
650 return false;
651
652 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
653 IEEE80211_STA_CONNECTION_POLL))
654 return false;
655
656 rcu_read_lock();
657 sta = sta_info_get(sdata, mgd->bssid);
658 if (sta)
c2c98fde 659 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 660 rcu_read_unlock();
661
c2c98fde 662 return authorized;
808118cb
JY		 663}
664
965bedad 665/* need to hold RTNL or interface lock */
10f644a4 666void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 667{
668 struct ieee80211_sub_if_data *sdata, *found = NULL;
669 int count = 0;
195e294d 670 int timeout;
965bedad
JB		 671
672 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
673 local->ps_sdata = NULL;
674 return;
675 }
676
af6b6374
JB		 677 if (!list_empty(&local->work_list)) {
678 local->ps_sdata = NULL;
679 goto change;
680 }
681
965bedad 682 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 683 if (!ieee80211_sdata_running(sdata))
965bedad 684 continue;
8c7914de
RM		 685 if (sdata->vif.type == NL80211_IFTYPE_AP) {
686 /* If an AP vif is found, then disable PS
687 * by setting the count to zero thereby setting
688 * ps_sdata to NULL.
689 */
690 count = 0;
691 break;
692 }
965bedad
JB		 693 if (sdata->vif.type != NL80211_IFTYPE_STATION)
694 continue;
695 found = sdata;
696 count++;
697 }
698
808118cb 699 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 700 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 701 s32 beaconint_us;
702
703 if (latency < 0)
ed77134b 704 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 705
706 beaconint_us = ieee80211_tu_to_usec(
707 found->vif.bss_conf.beacon_int);
708
ff616381 709 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 710 if (timeout < 0) {
711 /*
ff616381
JO		 712 * Go to full PSM if the user configures a very low
713 * latency requirement.
0ab82b04
EP		 714 * The 2000 second value is there for compatibility
715 * until the PM_QOS_NETWORK_LATENCY is configured
716 * with real values.
195e294d 717 */
0ab82b04
EP		 718 if (latency > (1900 * USEC_PER_MSEC) &&
719 latency != (2000 * USEC_PER_SEC))
195e294d 720 timeout = 0;
ff616381
JO		 721 else
722 timeout = 100;
195e294d 723 }
f90754c1
JO		 724 local->dynamic_ps_user_timeout = timeout;
725 if (!local->disable_dynamic_ps)
726 conf->dynamic_ps_timeout =
727 local->dynamic_ps_user_timeout;
195e294d 728
04fe2037 729 if (beaconint_us > latency) {
10f644a4 730 local->ps_sdata = NULL;
04fe2037 731 } else {
56007a02 732 struct ieee80211_bss *bss;
04fe2037 733 int maxslp = 1;
56007a02 734 u8 dtimper;
04fe2037 735
56007a02
JB		 736 bss = (void *)found->u.mgd.associated->priv;
737 dtimper = bss->dtim_period;
738
739 /* If the TIM IE is invalid, pretend the value is 1 */
740 if (!dtimper)
741 dtimper = 1;
742 else if (dtimper > 1)
04fe2037
JB		 743 maxslp = min_t(int, dtimper,
744 latency / beaconint_us);
745
9ccebe61 746 local->hw.conf.max_sleep_period = maxslp;
56007a02 747 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 748 local->ps_sdata = found;
04fe2037 749 }
10f644a4 750 } else {
965bedad 751 local->ps_sdata = NULL;
10f644a4 752 }
965bedad 753
af6b6374 754 change:
965bedad
JB		 755 ieee80211_change_ps(local);
756}
757
758void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
759{
760 struct ieee80211_local *local =
761 container_of(work, struct ieee80211_local,
762 dynamic_ps_disable_work);
763
764 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
765 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
766 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
767 }
768
769 ieee80211_wake_queues_by_reason(&local->hw,
770 IEEE80211_QUEUE_STOP_REASON_PS);
771}
772
773void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
774{
775 struct ieee80211_local *local =
776 container_of(work, struct ieee80211_local,
777 dynamic_ps_enable_work);
778 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 779 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 780 unsigned long flags;
781 int q;
965bedad
JB		 782
783 /* can only happen when PS was just disabled anyway */
784 if (!sdata)
785 return;
786
5e34069c
CL		 787 ifmgd = &sdata->u.mgd;
788
965bedad
JB		 789 if (local->hw.conf.flags & IEEE80211_CONF_PS)
790 return;
791
77b7023a
AN		 792 if (!local->disable_dynamic_ps &&
793 local->hw.conf.dynamic_ps_timeout > 0) {
794 /* don't enter PS if TX frames are pending */
795 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 796 mod_timer(&local->dynamic_ps_timer, jiffies +
797 msecs_to_jiffies(
798 local->hw.conf.dynamic_ps_timeout));
799 return;
800 }
77b7023a
AN		 801
802 /*
803 * transmission can be stopped by others which leads to
804 * dynamic_ps_timer expiry. Postpone the ps timer if it
805 * is not the actual idle state.
806 */
807 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
808 for (q = 0; q < local->hw.queues; q++) {
809 if (local->queue_stop_reasons[q]) {
810 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
811 flags);
812 mod_timer(&local->dynamic_ps_timer, jiffies +
813 msecs_to_jiffies(
814 local->hw.conf.dynamic_ps_timeout));
815 return;
816 }
817 }
818 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 819 }
1ddc2867 820
375177bf 821 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 822 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 823 netif_tx_stop_all_queues(sdata->dev);
965bedad 824
e8306f98
VN		 825 if (drv_tx_frames_pending(local))
826 mod_timer(&local->dynamic_ps_timer, jiffies +
827 msecs_to_jiffies(
828 local->hw.conf.dynamic_ps_timeout));
829 else {
830 ieee80211_send_nullfunc(local, sdata, 1);
831 /* Flush to get the tx status of nullfunc frame */
832 drv_flush(local, false);
833 }
f3e85b9e
VN		 834 }
835
2a13052f
JO		 836 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
837 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 838 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
839 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
840 local->hw.conf.flags |= IEEE80211_CONF_PS;
841 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
842 }
f3e85b9e 843
77b7023a
AN		 844 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
845 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 846}
847
848void ieee80211_dynamic_ps_timer(unsigned long data)
849{
850 struct ieee80211_local *local = (void *) data;
851
78f1a8b7 852 if (local->quiescing || local->suspended)
5bb644a0
JB		 853 return;
854
42935eca 855 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 856}
857
60f8b39c 858/* MLME */
f698d856 859static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 860 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 861 u8 *wmm_param, size_t wmm_param_len)
862{
f0706e82 863 struct ieee80211_tx_queue_params params;
4ced3f74 864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 865 size_t left;
866 int count;
ab13315a 867 u8 *pos, uapsd_queues = 0;
f0706e82 868
e1b3ec1a
SG		 869 if (!local->ops->conf_tx)
870 return;
871
af6b6374 872 if (local->hw.queues < 4)
3434fbd3
JB		 873 return;
874
875 if (!wmm_param)
876 return;
877
f0706e82
JB		 878 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
879 return;
ab13315a
KV		 880
881 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 882 uapsd_queues = local->uapsd_queues;
ab13315a 883
f0706e82 884 count = wmm_param[6] & 0x0f;
46900298 885 if (count == ifmgd->wmm_last_param_set)
f0706e82 886 return;
46900298 887 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 888
889 pos = wmm_param + 8;
890 left = wmm_param_len - 8;
891
892 memset(&params, 0, sizeof(params));
893
f0706e82
JB		 894 local->wmm_acm = 0;
895 for (; left >= 4; left -= 4, pos += 4) {
896 int aci = (pos[0] >> 5) & 0x03;
897 int acm = (pos[0] >> 4) & 0x01;
ab13315a 898 bool uapsd = false;
f0706e82
JB		 899 int queue;
900
901 switch (aci) {
0eeb59fe 902 case 1: /* AC_BK */
e100bb64 903 queue = 3;
988c0f72 904 if (acm)
0eeb59fe 905 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 906 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
907 uapsd = true;
f0706e82 908 break;
0eeb59fe 909 case 2: /* AC_VI */
e100bb64 910 queue = 1;
988c0f72 911 if (acm)
0eeb59fe 912 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 913 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
914 uapsd = true;
f0706e82 915 break;
0eeb59fe 916 case 3: /* AC_VO */
e100bb64 917 queue = 0;
988c0f72 918 if (acm)
0eeb59fe 919 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
921 uapsd = true;
f0706e82 922 break;
0eeb59fe 923 case 0: /* AC_BE */
f0706e82 924 default:
e100bb64 925 queue = 2;
988c0f72 926 if (acm)
0eeb59fe 927 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 928 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
929 uapsd = true;
f0706e82
JB		 930 break;
931 }
932
933 params.aifs = pos[0] & 0x0f;
934 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
935 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 936 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 937 params.uapsd = uapsd;
938
f4ea83dd 939#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 940 wiphy_debug(local->hw.wiphy,
941 "WMM queue=%d aci=%d acm=%d aifs=%d "
942 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
943 queue, aci, acm,
944 params.aifs, params.cw_min, params.cw_max,
945 params.txop, params.uapsd);
3330d7be 946#endif
f6f3def3
EP		 947 sdata->tx_conf[queue] = params;
948 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 949 wiphy_debug(local->hw.wiphy,
950 "failed to set TX queue parameters for queue %d\n",
951 queue);
f0706e82 952 }
e1b3ec1a
SG		 953
954 /* enable WMM or activate new settings */
4ced3f74
JB		 955 sdata->vif.bss_conf.qos = true;
956 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 957}
958
7a5158ef
JB		 959static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
960 u16 capab, bool erp_valid, u8 erp)
5628221c 961{
bda3933a 962 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 963 u32 changed = 0;
7a5158ef
JB		 964 bool use_protection;
965 bool use_short_preamble;
966 bool use_short_slot;
967
968 if (erp_valid) {
969 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
970 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
971 } else {
972 use_protection = false;
973 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
974 }
975
976 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 977 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
978 use_short_slot = true;
5628221c 979
471b3efd 980 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 981 bss_conf->use_cts_prot = use_protection;
982 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 983 }
7e9ed188 984
d43c7b37 985 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 986 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 987 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 988 }
d9430a32 989
7a5158ef 990 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 991 bss_conf->use_short_slot = use_short_slot;
992 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 993 }
994
995 return changed;
996}
997
f698d856 998static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 999 struct cfg80211_bss *cbss,
ae5eb026 1000 u32 bss_info_changed)
f0706e82 1001{
0c1ad2ca 1002 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1003 struct ieee80211_local *local = sdata->local;
68542962 1004 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1005
ae5eb026 1006 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1007 /* set timing information */
68542962
JO		 1008 bss_conf->beacon_int = cbss->beacon_interval;
1009 bss_conf->timestamp = cbss->tsf;
5628221c 1010
77fdaa12
JB		 1011 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1012 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1013 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1014
7ccc8bd7
FF		 1015 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1016 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1017
0c1ad2ca
JB		 1018 sdata->u.mgd.associated = cbss;
1019 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1020
17e4ec14
JM		 1021 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1022
b291ba11
JB		 1023 /* just to be sure */
1024 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1025 IEEE80211_STA_BEACON_POLL);
1026
9ac19a90 1027 ieee80211_led_assoc(local, 1);
9306102e 1028
e5b900d2
JB		 1029 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1030 bss_conf->dtim_period = bss->dtim_period;
1031 else
1032 bss_conf->dtim_period = 0;
1033
68542962 1034 bss_conf->assoc = 1;
96dd22ac
JB		 1035 /*
1036 * For now just always ask the driver to update the basic rateset
1037 * when we have associated, we aren't checking whether it actually
1038 * changed or not.
1039 */
ae5eb026 1040 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1041
1042 /* And the BSSID changed - we're associated now */
1043 bss_info_changed |= BSS_CHANGED_BSSID;
1044
a97c13c3 1045 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1046 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1047 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1048 bss_info_changed |= BSS_CHANGED_CQM;
1049
68542962
JO		 1050 /* Enable ARP filtering */
1051 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1052 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1053 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1054 }
1055
ae5eb026 1056 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1057
056508dc
JB		 1058 mutex_lock(&local->iflist_mtx);
1059 ieee80211_recalc_ps(local, -1);
025e6be2 1060 ieee80211_recalc_smps(local);
056508dc 1061 mutex_unlock(&local->iflist_mtx);
e0cb686f 1062
8a5b33f5 1063 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1064 netif_carrier_on(sdata->dev);
f0706e82
JB		 1065}
1066
e69e95db 1067static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1068 bool remove_sta, bool tx)
aa458d17 1069{
46900298 1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1071 struct ieee80211_local *local = sdata->local;
1072 struct sta_info *sta;
e0cb686f 1073 u32 changed = 0, config_changed = 0;
b291ba11 1074 u8 bssid[ETH_ALEN];
aa458d17 1075
77fdaa12
JB		 1076 ASSERT_MGD_MTX(ifmgd);
1077
b291ba11
JB		 1078 if (WARN_ON(!ifmgd->associated))
1079 return;
1080
0c1ad2ca 1081 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1082
77fdaa12
JB		 1083 ifmgd->associated = NULL;
1084 memset(ifmgd->bssid, 0, ETH_ALEN);
1085
1086 /*
1087 * we need to commit the associated = NULL change because the
1088 * scan code uses that to determine whether this iface should
1089 * go to/wake up from powersave or not -- and could otherwise
1090 * wake the queues erroneously.
1091 */
1092 smp_mb();
1093
1094 /*
1095 * Thus, we can only afterwards stop the queues -- to account
1096 * for the case where another CPU is finishing a scan at this
1097 * time -- we don't want the scan code to enable queues.
1098 */
aa458d17 1099
8a5b33f5 1100 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1101 netif_carrier_off(sdata->dev);
1102
2a419056 1103 mutex_lock(&local->sta_mtx);
abe60632 1104 sta = sta_info_get(sdata, bssid);
4cad6c7c 1105 if (sta) {
c2c98fde 1106 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1107 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1108 }
2a419056 1109 mutex_unlock(&local->sta_mtx);
aa458d17 1110
f5e5bf25
TW		 1111 changed |= ieee80211_reset_erp_info(sdata);
1112
f5e5bf25 1113 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1114 changed |= BSS_CHANGED_ASSOC;
1115 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1116
aa837e1d
JB		 1117 ieee80211_set_wmm_default(sdata);
1118
4797938c 1119 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1120 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1121
413ad50a
JB		 1122 /* on the next assoc, re-program HT parameters */
1123 sdata->ht_opmode_valid = false;
ef96a842
BG		 1124 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1125 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1126
a8302de9
VT		 1127 local->power_constr_level = 0;
1128
520eb820
KV		 1129 del_timer_sync(&local->dynamic_ps_timer);
1130 cancel_work_sync(&local->dynamic_ps_enable_work);
1131
e0cb686f
KV		 1132 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1133 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1134 config_changed |= IEEE80211_CONF_CHANGE_PS;
1135 }
a331400b 1136 local->ps_sdata = NULL;
ae5eb026 1137
e0cb686f 1138 ieee80211_hw_config(local, config_changed);
9cef8737 1139
68542962
JO		 1140 /* Disable ARP filtering */
1141 if (sdata->vif.bss_conf.arp_filter_enabled) {
1142 sdata->vif.bss_conf.arp_filter_enabled = false;
1143 changed |= BSS_CHANGED_ARP_FILTER;
1144 }
1145
0aaffa9b
JB		 1146 /* The BSSID (not really interesting) and HT changed */
1147 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1148 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1149
07ba55d7 1150 /* remove AP and TDLS peers */
e69e95db 1151 if (remove_sta)
07ba55d7 1152 sta_info_flush(local, sdata);
b9dcf712
JB		 1153
1154 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1155 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1156 del_timer_sync(&sdata->u.mgd.timer);
1157 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1158}
f0706e82 1159
3cf335d5
KV		 1160void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1161 struct ieee80211_hdr *hdr)
1162{
1163 /*
1164 * We can postpone the mgd.timer whenever receiving unicast frames
1165 * from AP because we know that the connection is working both ways
1166 * at that time. But multicast frames (and hence also beacons) must
1167 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1168 * data idle periods for sending the periodic probe request to the
1169 * AP we're connected to.
3cf335d5 1170 */
b291ba11
JB		 1171 if (is_multicast_ether_addr(hdr->addr1))
1172 return;
1173
be099e82 1174 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1175}
f0706e82 1176
4e5ff376
FF		 1177static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1178{
1179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1180
1181 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1182 IEEE80211_STA_CONNECTION_POLL)))
1183 return;
1184
1185 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1186 IEEE80211_STA_BEACON_POLL);
1187 mutex_lock(&sdata->local->iflist_mtx);
1188 ieee80211_recalc_ps(sdata->local, -1);
1189 mutex_unlock(&sdata->local->iflist_mtx);
1190
1191 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1192 return;
1193
1194 /*
1195 * We've received a probe response, but are not sure whether
1196 * we have or will be receiving any beacons or data, so let's
1197 * schedule the timers again, just in case.
1198 */
1199 ieee80211_sta_reset_beacon_monitor(sdata);
1200
1201 mod_timer(&ifmgd->conn_mon_timer,
1202 round_jiffies_up(jiffies +
1203 IEEE80211_CONNECTION_IDLE_TIME));
1204}
1205
1206void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1207 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1208{
75706d0e 1209 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1210 return;
1211
04ac3c0e
FF		 1212 if (ack)
1213 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1214
1215 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1216 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1217 if (ack)
1218 sdata->u.mgd.probe_send_count = 0;
1219 else
1220 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1221 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1222 }
1223}
1224
a43abf29
ML		 1225static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1226{
1227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1228 const u8 *ssid;
f01a067d 1229 u8 *dst = ifmgd->associated->bssid;
180205bd 1230 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1231
1232 /*
1233 * Try sending broadcast probe requests for the last three
1234 * probe requests after the first ones failed since some
1235 * buggy APs only support broadcast probe requests.
1236 */
1237 if (ifmgd->probe_send_count >= unicast_limit)
1238 dst = NULL;
a43abf29 1239
4e5ff376
FF		 1240 /*
1241 * When the hardware reports an accurate Tx ACK status, it's
1242 * better to send a nullfunc frame instead of a probe request,
1243 * as it will kick us off the AP quickly if we aren't associated
1244 * anymore. The timeout will be reset if the frame is ACKed by
1245 * the AP.
1246 */
04ac3c0e
FF		 1247 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1248 ifmgd->nullfunc_failed = false;
4e5ff376 1249 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1250 } else {
4e5ff376 1251 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1252 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1253 (u32) -1, true, false);
4e5ff376 1254 }
a43abf29
ML		 1255
1256 ifmgd->probe_send_count++;
180205bd 1257 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1258 run_again(ifmgd, ifmgd->probe_timeout);
1259}
1260
b291ba11
JB		 1261static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1262 bool beacon)
04de8381 1263{
04de8381 1264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1265 bool already = false;
34bfc411 1266
9607e6b6 1267 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1268 return;
1269
91a3bd76
LR		 1270 if (sdata->local->scanning)
1271 return;
1272
b8bc4b0a
JB		 1273 if (sdata->local->tmp_channel)
1274 return;
1275
77fdaa12
JB		 1276 mutex_lock(&ifmgd->mtx);
1277
1278 if (!ifmgd->associated)
1279 goto out;
1280
a860402d 1281#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1282 if (beacon && net_ratelimit())
1283 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1284 "- sending probe request\n", sdata->name);
a860402d 1285#endif
04de8381 1286
b291ba11
JB		 1287 /*
1288 * The driver/our work has already reported this event or the
1289 * connection monitoring has kicked in and we have already sent
1290 * a probe request. Or maybe the AP died and the driver keeps
1291 * reporting until we disassociate...
1292 *
1293 * In either case we have to ignore the current call to this
1294 * function (except for setting the correct probe reason bit)
1295 * because otherwise we would reset the timer every time and
1296 * never check whether we received a probe response!
1297 */
1298 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1299 IEEE80211_STA_CONNECTION_POLL))
1300 already = true;
1301
1302 if (beacon)
1303 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1304 else
1305 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1306
1307 if (already)
1308 goto out;
1309
4e751843
JB		 1310 mutex_lock(&sdata->local->iflist_mtx);
1311 ieee80211_recalc_ps(sdata->local, -1);
1312 mutex_unlock(&sdata->local->iflist_mtx);
1313
a43abf29
ML		 1314 ifmgd->probe_send_count = 0;
1315 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1316 out:
1317 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1318}
1319
a619a4c0
JO		 1320struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1321 struct ieee80211_vif *vif)
1322{
1323 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1325 struct sk_buff *skb;
1326 const u8 *ssid;
1327
1328 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1329 return NULL;
1330
1331 ASSERT_MGD_MTX(ifmgd);
1332
1333 if (!ifmgd->associated)
1334 return NULL;
1335
1336 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1337 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1338 (u32) -1, ssid + 2, ssid[1],
1339 NULL, 0, true);
a619a4c0
JO		 1340
1341 return skb;
1342}
1343EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1344
1e4dcd01
JO		 1345static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1346{
1347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1348 struct ieee80211_local *local = sdata->local;
1349 u8 bssid[ETH_ALEN];
1350
1351 mutex_lock(&ifmgd->mtx);
1352 if (!ifmgd->associated) {
1353 mutex_unlock(&ifmgd->mtx);
1354 return;
1355 }
1356
1357 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1358
180205bd
BG		 1359 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1360 sdata->name, bssid);
1e4dcd01 1361
53f73c09 1362 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1363 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1364
1e4dcd01
JO		 1365 /*
1366 * must be outside lock due to cfg80211,
1367 * but that's not a problem.
1368 */
1369 ieee80211_send_deauth_disassoc(sdata, bssid,
1370 IEEE80211_STYPE_DEAUTH,
1371 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1372 NULL, true);
fcac4fb0
FF		 1373
1374 mutex_lock(&local->mtx);
1375 ieee80211_recalc_idle(local);
1376 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1377}
1378
1379void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1380{
1381 struct ieee80211_sub_if_data *sdata =
1382 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1383 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1385 struct sta_info *sta;
1386
1387 if (ifmgd->associated) {
30fa9047 1388 rcu_read_lock();
a85e1d55
PS		 1389 sta = sta_info_get(sdata, ifmgd->bssid);
1390 if (sta)
1391 sta->beacon_loss_count++;
30fa9047 1392 rcu_read_unlock();
a85e1d55 1393 }
b291ba11 1394
1e4dcd01
JO		 1395 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1396 __ieee80211_connection_loss(sdata);
1397 else
1398 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1399}
1400
04de8381
KV		 1401void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1402{
1403 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1404 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1405
b5878a2d
JB		 1406 trace_api_beacon_loss(sdata);
1407
1e4dcd01
JO		 1408 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1409 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1410}
1411EXPORT_SYMBOL(ieee80211_beacon_loss);
1412
1e4dcd01
JO		 1413void ieee80211_connection_loss(struct ieee80211_vif *vif)
1414{
1415 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1416 struct ieee80211_hw *hw = &sdata->local->hw;
1417
b5878a2d
JB		 1418 trace_api_connection_loss(sdata);
1419
1e4dcd01
JO		 1420 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1421 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1422}
1423EXPORT_SYMBOL(ieee80211_connection_loss);
1424
1425
77fdaa12
JB		 1426static enum rx_mgmt_action __must_check
1427ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1428 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1429{
46900298 1430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1431 const u8 *bssid = NULL;
f0706e82
JB		 1432 u16 reason_code;
1433
f4ea83dd 1434 if (len < 24 + 2)
77fdaa12 1435 return RX_MGMT_NONE;
f0706e82 1436
77fdaa12
JB		 1437 ASSERT_MGD_MTX(ifmgd);
1438
0c1ad2ca 1439 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1440
1441 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1442
77fdaa12 1443 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1444 sdata->name, bssid, reason_code);
77fdaa12 1445
53f73c09 1446 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1447 mutex_lock(&sdata->local->mtx);
63f170e0 1448 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1449 mutex_unlock(&sdata->local->mtx);
f0706e82 1450
77fdaa12 1451 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1452}
1453
1454
77fdaa12
JB		 1455static enum rx_mgmt_action __must_check
1456ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1457 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1458{
46900298 1459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1460 u16 reason_code;
1461
f4ea83dd 1462 if (len < 24 + 2)
77fdaa12 1463 return RX_MGMT_NONE;
f0706e82 1464
77fdaa12
JB		 1465 ASSERT_MGD_MTX(ifmgd);
1466
1467 if (WARN_ON(!ifmgd->associated))
1468 return RX_MGMT_NONE;
1469
0c1ad2ca 1470 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1471 return RX_MGMT_NONE;
f0706e82
JB		 1472
1473 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1474
0ff71613 1475 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1476 sdata->name, mgmt->sa, reason_code);
f0706e82 1477
53f73c09 1478 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1479 mutex_lock(&sdata->local->mtx);
bc83b681 1480 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1481 mutex_unlock(&sdata->local->mtx);
77fdaa12 1482 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1483}
1484
c74d084f
CL		 1485static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1486 u8 *supp_rates, unsigned int supp_rates_len,
1487 u32 *rates, u32 *basic_rates,
1488 bool *have_higher_than_11mbit,
1489 int *min_rate, int *min_rate_index)
1490{
1491 int i, j;
1492
1493 for (i = 0; i < supp_rates_len; i++) {
1494 int rate = (supp_rates[i] & 0x7f) * 5;
1495 bool is_basic = !!(supp_rates[i] & 0x80);
1496
1497 if (rate > 110)
1498 *have_higher_than_11mbit = true;
1499
1500 /*
1501 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1502 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1503 *
1504 * Note: Even through the membership selector and the basic
1505 * rate flag share the same bit, they are not exactly
1506 * the same.
1507 */
1508 if (!!(supp_rates[i] & 0x80) &&
1509 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1510 continue;
1511
1512 for (j = 0; j < sband->n_bitrates; j++) {
1513 if (sband->bitrates[j].bitrate == rate) {
1514 *rates |= BIT(j);
1515 if (is_basic)
1516 *basic_rates |= BIT(j);
1517 if (rate < *min_rate) {
1518 *min_rate = rate;
1519 *min_rate_index = j;
1520 }
1521 break;
1522 }
1523 }
1524 }
1525}
f0706e82 1526
af6b6374
JB		 1527static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1528 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1529{
af6b6374 1530 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1531 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1532 struct ieee80211_local *local = sdata->local;
8318d78a 1533 struct ieee80211_supported_band *sband;
f0706e82 1534 struct sta_info *sta;
0c1ad2ca 1535 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1536 u8 *pos;
881d948c 1537 u32 rates, basic_rates;
af6b6374 1538 u16 capab_info, aid;
f0706e82 1539 struct ieee802_11_elems elems;
bda3933a 1540 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1541 u32 changed = 0;
c74d084f 1542 int err;
5d1ec85f 1543 bool have_higher_than_11mbit = false;
ae5eb026 1544 u16 ap_ht_cap_flags;
3432f923 1545 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 1546
af6b6374 1547 /* AssocResp and ReassocResp have identical structure */
f0706e82 1548
f0706e82 1549 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1550 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1551
1dd84aa2 1552 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1553 printk(KERN_DEBUG
1554 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1555 sdata->name, aid);
1dd84aa2
JB		 1556 aid &= ~(BIT(15) | BIT(14));
1557
05cb9108
JB		 1558 ifmgd->broken_ap = false;
1559
1560 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1561 printk(KERN_DEBUG
1562 "%s: invalid AID value %d (out of range), turn off PS\n",
1563 sdata->name, aid);
1564 aid = 0;
1565 ifmgd->broken_ap = true;
1566 }
1567
af6b6374
JB		 1568 pos = mgmt->u.assoc_resp.variable;
1569 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1570
f0706e82
JB		 1571 if (!elems.supp_rates) {
1572 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1573 sdata->name);
af6b6374 1574 return false;
f0706e82
JB		 1575 }
1576
46900298 1577 ifmgd->aid = aid;
f0706e82 1578
2a33bee2
GE		 1579 mutex_lock(&sdata->local->sta_mtx);
1580 /*
1581 * station info was already allocated and inserted before
1582 * the association and should be available to us
1583 */
7852e361 1584 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 1585 if (WARN_ON(!sta)) {
1586 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1587 return false;
77fdaa12 1588 }
05e5e883 1589
60f8b39c
JB		 1590 rates = 0;
1591 basic_rates = 0;
e7480bbb 1592 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1593
c74d084f
CL		 1594 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
1595 &rates, &basic_rates, &have_higher_than_11mbit,
1596 &min_rate, &min_rate_index);
f0706e82 1597
c74d084f
CL		 1598 ieee80211_get_rates(sband, elems.ext_supp_rates,
1599 elems.ext_supp_rates_len, &rates, &basic_rates,
1600 &have_higher_than_11mbit,
1601 &min_rate, &min_rate_index);
f0706e82 1602
3432f923
EP		 1603 /*
1604 * some buggy APs don't advertise basic_rates. use the lowest
1605 * supported rate instead.
1606 */
1607 if (unlikely(!basic_rates) && min_rate_index >= 0) {
1608 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
1609 "Using min supported rate instead.\n", sdata->name);
1610 basic_rates = BIT(min_rate_index);
1611 }
1612
e7480bbb 1613 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1614 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1615
1616 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1617 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1618 have_higher_than_11mbit)
1619 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1620 else
1621 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1622
ab1faead 1623 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 1624 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 1625 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1626
1627 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1628
4b7679a5 1629 rate_control_rate_init(sta);
f0706e82 1630
46900298 1631 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 1632 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 1633
ddf4ac53 1634 if (elems.wmm_param)
c2c98fde 1635 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 1636
c8987876
JB		 1637 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1638 if (!err)
1639 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1640 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1641 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
1642 if (err) {
1643 printk(KERN_DEBUG
1644 "%s: failed to move station %pM to desired state\n",
1645 sdata->name, sta->sta.addr);
1646 WARN_ON(__sta_info_destroy(sta));
1647 mutex_unlock(&sdata->local->sta_mtx);
1648 return false;
1649 }
1650
7852e361 1651 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 1652
f2176d72
JO		 1653 /*
1654 * Always handle WMM once after association regardless
1655 * of the first value the AP uses. Setting -1 here has
1656 * that effect because the AP values is an unsigned
1657 * 4-bit value.
1658 */
1659 ifmgd->wmm_last_param_set = -1;
1660
ddf4ac53 1661 if (elems.wmm_param)
4ced3f74 1662 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1663 elems.wmm_param_len);
aa837e1d
JB		 1664 else
1665 ieee80211_set_wmm_default(sdata);
f0706e82 1666
e4da8c37
JB		 1667 local->oper_channel = wk->chan;
1668
ae5eb026 1669 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1670 (sdata->local->hw.queues >= 4) &&
ab1faead 1671 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1672 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1673 cbss->bssid, ap_ht_cap_flags,
1674 false);
ae5eb026 1675
60f8b39c
JB		 1676 /* set AID and assoc capability,
1677 * ieee80211_set_associated() will tell the driver */
1678 bss_conf->aid = aid;
1679 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1680 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1681
d524215f
FF		 1682 /*
1683 * If we're using 4-addr mode, let the AP know that we're
1684 * doing so, so that it can create the STA VLAN on its side
1685 */
1686 if (ifmgd->use_4addr)
1687 ieee80211_send_4addr_nullfunc(local, sdata);
1688
15b7b062 1689 /*
b291ba11
JB		 1690 * Start timer to probe the connection to the AP now.
1691 * Also start the timer that will detect beacon loss.
15b7b062 1692 */
b291ba11 1693 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1694 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1695
af6b6374 1696 return true;
f0706e82
JB		 1697}
1698
1699
98c8fccf
JB		 1700static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1701 struct ieee80211_mgmt *mgmt,
1702 size_t len,
1703 struct ieee80211_rx_status *rx_status,
1704 struct ieee802_11_elems *elems,
1705 bool beacon)
1706{
1707 struct ieee80211_local *local = sdata->local;
1708 int freq;
c2b13452 1709 struct ieee80211_bss *bss;
98c8fccf 1710 struct ieee80211_channel *channel;
56007a02
JB		 1711 bool need_ps = false;
1712
1713 if (sdata->u.mgd.associated) {
1714 bss = (void *)sdata->u.mgd.associated->priv;
1715 /* not previously set so we may need to recalc */
1716 need_ps = !bss->dtim_period;
1717 }
98c8fccf
JB		 1718
1719 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1720 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1721 rx_status->band);
98c8fccf
JB		 1722 else
1723 freq = rx_status->freq;
1724
1725 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1726
1727 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1728 return;
1729
98c8fccf 1730 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1731 channel, beacon);
77fdaa12
JB		 1732 if (bss)
1733 ieee80211_rx_bss_put(local, bss);
1734
1735 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1736 return;
1737
56007a02
JB		 1738 if (need_ps) {
1739 mutex_lock(&local->iflist_mtx);
1740 ieee80211_recalc_ps(local, -1);
1741 mutex_unlock(&local->iflist_mtx);
1742 }
1743
c481ec97 1744 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1745 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1746 ETH_ALEN) == 0)) {
c481ec97
S		 1747 struct ieee80211_channel_sw_ie *sw_elem =
1748 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1749 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1750 bss, rx_status->mactime);
c481ec97 1751 }
f0706e82
JB		 1752}
1753
1754
f698d856 1755static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1756 struct sk_buff *skb)
f0706e82 1757{
af6b6374 1758 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1759 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1760 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1761 size_t baselen, len = skb->len;
ae6a44e3
EK		 1762 struct ieee802_11_elems elems;
1763
15b7b062
KV		 1764 ifmgd = &sdata->u.mgd;
1765
77fdaa12
JB		 1766 ASSERT_MGD_MTX(ifmgd);
1767
47846c9b 1768 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1769 return; /* ignore ProbeResp to foreign address */
1770
ae6a44e3
EK		 1771 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1772 if (baselen > len)
1773 return;
1774
1775 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1776 &elems);
1777
98c8fccf 1778 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1779
77fdaa12 1780 if (ifmgd->associated &&
4e5ff376
FF		 1781 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1782 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1783}
1784
d91f36db
JB		 1785/*
1786 * This is the canonical list of information elements we care about,
1787 * the filter code also gives us all changes to the Microsoft OUI
1788 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1789 *
1790 * We implement beacon filtering in software since that means we can
1791 * avoid processing the frame here and in cfg80211, and userspace
1792 * will not be able to tell whether the hardware supports it or not.
1793 *
1794 * XXX: This list needs to be dynamic -- userspace needs to be able to
1795 * add items it requires. It also needs to be able to tell us to
1796 * look out for other vendor IEs.
1797 */
1798static const u64 care_about_ies =
1d4df3a5
JB		 1799 (1ULL << WLAN_EID_COUNTRY) |
1800 (1ULL << WLAN_EID_ERP_INFO) |
1801 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1802 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1803 (1ULL << WLAN_EID_HT_CAPABILITY) |
1804 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1805
f698d856 1806static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1807 struct ieee80211_mgmt *mgmt,
1808 size_t len,
1809 struct ieee80211_rx_status *rx_status)
1810{
d91f36db 1811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1812 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1813 size_t baselen;
1814 struct ieee802_11_elems elems;
f698d856 1815 struct ieee80211_local *local = sdata->local;
471b3efd 1816 u32 changed = 0;
d91f36db 1817 bool erp_valid, directed_tim = false;
7a5158ef 1818 u8 erp_value = 0;
d91f36db 1819 u32 ncrc;
77fdaa12
JB		 1820 u8 *bssid;
1821
1822 ASSERT_MGD_MTX(ifmgd);
f0706e82 1823
ae6a44e3
EK		 1824 /* Process beacon from the current BSS */
1825 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1826 if (baselen > len)
1827 return;
1828
d91f36db 1829 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1830 return;
f0706e82 1831
b291ba11
JB		 1832 /*
1833 * We might have received a number of frames, among them a
1834 * disassoc frame and a beacon...
1835 */
1836 if (!ifmgd->associated)
77fdaa12
JB		 1837 return;
1838
0c1ad2ca 1839 bssid = ifmgd->associated->bssid;
77fdaa12 1840
b291ba11
JB		 1841 /*
1842 * And in theory even frames from a different AP we were just
1843 * associated to a split-second ago!
1844 */
1845 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1846 return;
1847
17e4ec14
JM		 1848 /* Track average RSSI from the Beacon frames of the current AP */
1849 ifmgd->last_beacon_signal = rx_status->signal;
1850 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1851 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1852 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1853 ifmgd->last_cqm_event_signal = 0;
391a200a 1854 ifmgd->count_beacon_signal = 1;
615f7b9b 1855 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1856 } else {
1857 ifmgd->ave_beacon_signal =
1858 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1859 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1860 ifmgd->ave_beacon_signal) / 16;
391a200a 1861 ifmgd->count_beacon_signal++;
17e4ec14 1862 }
615f7b9b
MV		 1863
1864 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1865 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1866 int sig = ifmgd->ave_beacon_signal;
1867 int last_sig = ifmgd->last_ave_beacon_signal;
1868
1869 /*
1870 * if signal crosses either of the boundaries, invoke callback
1871 * with appropriate parameters
1872 */
1873 if (sig > ifmgd->rssi_max_thold &&
1874 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1875 ifmgd->last_ave_beacon_signal = sig;
1876 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1877 } else if (sig < ifmgd->rssi_min_thold &&
1878 (last_sig >= ifmgd->rssi_max_thold ||
1879 last_sig == 0)) {
1880 ifmgd->last_ave_beacon_signal = sig;
1881 drv_rssi_callback(local, RSSI_EVENT_LOW);
1882 }
1883 }
1884
17e4ec14 1885 if (bss_conf->cqm_rssi_thold &&
391a200a 1886 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 1887 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 1888 int sig = ifmgd->ave_beacon_signal / 16;
1889 int last_event = ifmgd->last_cqm_event_signal;
1890 int thold = bss_conf->cqm_rssi_thold;
1891 int hyst = bss_conf->cqm_rssi_hyst;
1892 if (sig < thold &&
1893 (last_event == 0 || sig < last_event - hyst)) {
1894 ifmgd->last_cqm_event_signal = sig;
1895 ieee80211_cqm_rssi_notify(
1896 &sdata->vif,
1897 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1898 GFP_KERNEL);
1899 } else if (sig > thold &&
1900 (last_event == 0 || sig > last_event + hyst)) {
1901 ifmgd->last_cqm_event_signal = sig;
1902 ieee80211_cqm_rssi_notify(
1903 &sdata->vif,
1904 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1905 GFP_KERNEL);
1906 }
1907 }
1908
b291ba11 1909 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1910#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1911 if (net_ratelimit()) {
1912 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1913 "to a received beacon\n", sdata->name);
92778180
JM		 1914 }
1915#endif
b291ba11 1916 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1917 mutex_lock(&local->iflist_mtx);
1918 ieee80211_recalc_ps(local, -1);
1919 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1920 }
1921
b291ba11
JB		 1922 /*
1923 * Push the beacon loss detection into the future since
1924 * we are processing a beacon from the AP just now.
1925 */
d3a910a8 1926 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1927
d91f36db
JB		 1928 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1929 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1930 len - baselen, &elems,
1931 care_about_ies, ncrc);
1932
1933 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1934 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1935 ifmgd->aid);
d91f36db 1936
d8ec4433 1937 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1938 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1939 true);
d91f36db 1940
4ced3f74 1941 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1942 elems.wmm_param_len);
1943 }
fe3fa827 1944
25c9c875 1945 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1946 if (directed_tim) {
572e0012
KV		 1947 if (local->hw.conf.dynamic_ps_timeout > 0) {
1948 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1949 ieee80211_hw_config(local,
1950 IEEE80211_CONF_CHANGE_PS);
1951 ieee80211_send_nullfunc(local, sdata, 0);
1952 } else {
1953 local->pspolling = true;
1954
1955 /*
1956 * Here is assumed that the driver will be
1957 * able to send ps-poll frame and receive a
1958 * response even though power save mode is
1959 * enabled, but some drivers might require
1960 * to disable power save here. This needs
1961 * to be investigated.
1962 */
1963 ieee80211_send_pspoll(local, sdata);
1964 }
a97b77b9
VN		 1965 }
1966 }
7a5158ef 1967
d8ec4433 1968 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1969 return;
1970 ifmgd->beacon_crc = ncrc;
d8ec4433 1971 ifmgd->beacon_crc_valid = true;
30196673 1972
7a5158ef
JB		 1973 if (elems.erp_info && elems.erp_info_len >= 1) {
1974 erp_valid = true;
1975 erp_value = elems.erp_info[0];
1976 } else {
1977 erp_valid = false;
50c4afb9 1978 }
7a5158ef
JB		 1979 changed |= ieee80211_handle_bss_capability(sdata,
1980 le16_to_cpu(mgmt->u.beacon.capab_info),
1981 erp_valid, erp_value);
f0706e82 1982
d3c990fb 1983
53d6f81c 1984 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1985 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1986 struct sta_info *sta;
1987 struct ieee80211_supported_band *sband;
1988 u16 ap_ht_cap_flags;
1989
1990 rcu_read_lock();
1991
abe60632 1992 sta = sta_info_get(sdata, bssid);
77fdaa12 1993 if (WARN_ON(!sta)) {
ae5eb026
JB		 1994 rcu_read_unlock();
1995 return;
1996 }
1997
1998 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1999
ef96a842 2000 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
ae5eb026
JB		 2001 elems.ht_cap_elem, &sta->sta.ht_cap);
2002
2003 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2004
2005 rcu_read_unlock();
2006
2007 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 2008 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 2009 }
2010
8b19e6ca 2011 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2012 if (elems.country_elem) {
a8302de9
VT		 2013 /* TODO: IBSS also needs this */
2014 if (elems.pwr_constr_elem)
2015 ieee80211_handle_pwr_constr(sdata,
2016 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2017 elems.pwr_constr_elem,
2018 elems.pwr_constr_elem_len);
3f2355cb
LR		 2019 }
2020
471b3efd 2021 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2022}
2023
1fa57d01
JB		 2024void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2025 struct sk_buff *skb)
f0706e82 2026{
77fdaa12 2027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2028 struct ieee80211_rx_status *rx_status;
f0706e82 2029 struct ieee80211_mgmt *mgmt;
77fdaa12 2030 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2031 u16 fc;
2032
f0706e82
JB		 2033 rx_status = (struct ieee80211_rx_status *) skb->cb;
2034 mgmt = (struct ieee80211_mgmt *) skb->data;
2035 fc = le16_to_cpu(mgmt->frame_control);
2036
77fdaa12
JB		 2037 mutex_lock(&ifmgd->mtx);
2038
2039 if (ifmgd->associated &&
0c1ad2ca 2040 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 2041 switch (fc & IEEE80211_FCTL_STYPE) {
2042 case IEEE80211_STYPE_BEACON:
2043 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2044 rx_status);
2045 break;
2046 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 2047 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 2048 break;
2049 case IEEE80211_STYPE_DEAUTH:
63f170e0 2050 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 2051 break;
2052 case IEEE80211_STYPE_DISASSOC:
2053 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2054 break;
2055 case IEEE80211_STYPE_ACTION:
8b9a4e6e 2056 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 2057 case WLAN_CATEGORY_SPECTRUM_MGMT:
2058 ieee80211_sta_process_chanswitch(sdata,
2059 &mgmt->u.action.u.chan_switch.sw_elem,
2060 (void *)ifmgd->associated->priv,
2061 rx_status->mactime);
2062 break;
2063 }
77fdaa12
JB		 2064 }
2065 mutex_unlock(&ifmgd->mtx);
2066
2067 switch (rma) {
2068 case RX_MGMT_NONE:
2069 /* no action */
2070 break;
2071 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2072 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2073 break;
2074 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2075 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2076 break;
2077 default:
2078 WARN(1, "unexpected: %d", rma);
2079 }
36b3a628 2080 return;
77fdaa12
JB		 2081 }
2082
77fdaa12
JB		 2083 mutex_unlock(&ifmgd->mtx);
2084
63f170e0 2085 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2086 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2087 struct ieee80211_local *local = sdata->local;
2088 struct ieee80211_work *wk;
2089
a1699b75 2090 mutex_lock(&local->mtx);
b054b747
JB		 2091 list_for_each_entry(wk, &local->work_list, list) {
2092 if (wk->sdata != sdata)
2093 continue;
2094
e5b900d2
JB		 2095 if (wk->type != IEEE80211_WORK_ASSOC &&
2096 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2097 continue;
2098
2099 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2100 continue;
2101 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2102 continue;
2103
2104 /*
2105 * Printing the message only here means we can't
2106 * spuriously print it, but it also means that it
2107 * won't be printed when the frame comes in before
2108 * we even tried to associate or in similar cases.
2109 *
2110 * Ultimately, I suspect cfg80211 should print the
2111 * messages instead.
2112 */
2113 printk(KERN_DEBUG
2114 "%s: deauthenticated from %pM (Reason: %u)\n",
2115 sdata->name, mgmt->bssid,
2116 le16_to_cpu(mgmt->u.deauth.reason_code));
2117
2118 list_del_rcu(&wk->list);
2119 free_work(wk);
2120 break;
2121 }
a1699b75 2122 mutex_unlock(&local->mtx);
f0706e82 2123
ce470613 2124 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2125 }
f0706e82
JB		 2126}
2127
9c6bd790 2128static void ieee80211_sta_timer(unsigned long data)
f0706e82 2129{
60f8b39c
JB		 2130 struct ieee80211_sub_if_data *sdata =
2131 (struct ieee80211_sub_if_data *) data;
46900298 2132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2133 struct ieee80211_local *local = sdata->local;
f0706e82 2134
5bb644a0
JB		 2135 if (local->quiescing) {
2136 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2137 return;
2138 }
2139
64592c8f 2140 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2141}
2142
04ac3c0e 2143static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2144 u8 *bssid, u8 reason)
04ac3c0e
FF		 2145{
2146 struct ieee80211_local *local = sdata->local;
2147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2148
2149 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2150 IEEE80211_STA_BEACON_POLL);
2151
2152 ieee80211_set_disassoc(sdata, true, true);
2153 mutex_unlock(&ifmgd->mtx);
04ac3c0e
FF		 2154 /*
2155 * must be outside lock due to cfg80211,
2156 * but that's not a problem.
2157 */
2158 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2159 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e 2160 NULL, true);
fcac4fb0
FF		 2161
2162 mutex_lock(&local->mtx);
2163 ieee80211_recalc_idle(local);
2164 mutex_unlock(&local->mtx);
2165
04ac3c0e
FF		 2166 mutex_lock(&ifmgd->mtx);
2167}
2168
1fa57d01 2169void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2170{
9c6bd790 2171 struct ieee80211_local *local = sdata->local;
1fa57d01 2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2173
77fdaa12
JB		 2174 /* then process the rest of the work */
2175 mutex_lock(&ifmgd->mtx);
2176
b291ba11
JB		 2177 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2178 IEEE80211_STA_CONNECTION_POLL) &&
2179 ifmgd->associated) {
a43abf29 2180 u8 bssid[ETH_ALEN];
72a8a3ed 2181 int max_tries;
a43abf29 2182
0c1ad2ca 2183 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2184
72a8a3ed 2185 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2186 max_tries = max_nullfunc_tries;
72a8a3ed 2187 else
180205bd 2188 max_tries = max_probe_tries;
72a8a3ed 2189
4e5ff376
FF		 2190 /* ACK received for nullfunc probing frame */
2191 if (!ifmgd->probe_send_count)
2192 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2193 else if (ifmgd->nullfunc_failed) {
2194 if (ifmgd->probe_send_count < max_tries) {
2195#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2196 wiphy_debug(local->hw.wiphy,
2197 "%s: No ack for nullfunc frame to"
bfc31df3 2198 " AP %pM, try %d/%i\n",
04ac3c0e 2199 sdata->name, bssid,
bfc31df3 2200 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2201#endif
2202 ieee80211_mgd_probe_ap_send(sdata);
2203 } else {
2204#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2205 wiphy_debug(local->hw.wiphy,
2206 "%s: No ack for nullfunc frame to"
2207 " AP %pM, disconnecting.\n",
c658e5db 2208 sdata->name, bssid);
04ac3c0e 2209#endif
95acac61
JB		 2210 ieee80211_sta_connection_lost(sdata, bssid,
2211 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2212 }
2213 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2214 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2215 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2216#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2217 wiphy_debug(local->hw.wiphy,
2218 "%s: Failed to send nullfunc to AP %pM"
2219 " after %dms, disconnecting.\n",
2220 sdata->name,
180205bd 2221 bssid, probe_wait_ms);
04ac3c0e 2222#endif
95acac61
JB		 2223 ieee80211_sta_connection_lost(sdata, bssid,
2224 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2225 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2226#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2227 wiphy_debug(local->hw.wiphy,
2228 "%s: No probe response from AP %pM"
bfc31df3 2229 " after %dms, try %d/%i\n",
b38afa87 2230 sdata->name,
180205bd 2231 bssid, probe_wait_ms,
bfc31df3 2232 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2233#endif
2234 ieee80211_mgd_probe_ap_send(sdata);
2235 } else {
b291ba11
JB		 2236 /*
2237 * We actually lost the connection ... or did we?
2238 * Let's make sure!
2239 */
b38afa87
BG		 2240 wiphy_debug(local->hw.wiphy,
2241 "%s: No probe response from AP %pM"
2242 " after %dms, disconnecting.\n",
2243 sdata->name,
180205bd 2244 bssid, probe_wait_ms);
04ac3c0e 2245
95acac61
JB		 2246 ieee80211_sta_connection_lost(sdata, bssid,
2247 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2248 }
2249 }
2250
77fdaa12 2251 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2252}
2253
b291ba11
JB		 2254static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2255{
2256 struct ieee80211_sub_if_data *sdata =
2257 (struct ieee80211_sub_if_data *) data;
2258 struct ieee80211_local *local = sdata->local;
2259
2260 if (local->quiescing)
2261 return;
2262
1e4dcd01
JO		 2263 ieee80211_queue_work(&sdata->local->hw,
2264 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2265}
2266
2267static void ieee80211_sta_conn_mon_timer(unsigned long data)
2268{
2269 struct ieee80211_sub_if_data *sdata =
2270 (struct ieee80211_sub_if_data *) data;
2271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2272 struct ieee80211_local *local = sdata->local;
2273
2274 if (local->quiescing)
2275 return;
2276
42935eca 2277 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2278}
2279
2280static void ieee80211_sta_monitor_work(struct work_struct *work)
2281{
2282 struct ieee80211_sub_if_data *sdata =
2283 container_of(work, struct ieee80211_sub_if_data,
2284 u.mgd.monitor_work);
2285
2286 ieee80211_mgd_probe_ap(sdata, false);
2287}
2288
9c6bd790
JB		 2289static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2290{
ad935687 2291 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2292 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2293 IEEE80211_STA_CONNECTION_POLL);
ad935687 2294
b291ba11 2295 /* let's probe the connection once */
42935eca 2296 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2297 &sdata->u.mgd.monitor_work);
2298 /* and do all the other regular work too */
64592c8f 2299 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2300 }
9c6bd790 2301}
f0706e82 2302
5bb644a0
JB		 2303#ifdef CONFIG_PM
2304void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2305{
2306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2307
2308 /*
2309 * we need to use atomic bitops for the running bits
2310 * only because both timers might fire at the same
2311 * time -- the code here is properly synchronised.
2312 */
2313
d1f5b7a3
JB		 2314 cancel_work_sync(&ifmgd->request_smps_work);
2315
0ecfe806 2316 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2317 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2318 if (del_timer_sync(&ifmgd->timer))
2319 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2320
2321 cancel_work_sync(&ifmgd->chswitch_work);
2322 if (del_timer_sync(&ifmgd->chswitch_timer))
2323 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2324
b291ba11
JB		 2325 /* these will just be re-established on connection */
2326 del_timer_sync(&ifmgd->conn_mon_timer);
2327 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2328}
2329
2330void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2331{
2332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2333
676b58c2
RM		 2334 if (!ifmgd->associated)
2335 return;
2336
95acac61
JB		 2337 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2338 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2339 mutex_lock(&ifmgd->mtx);
2340 if (ifmgd->associated) {
2341#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2342 wiphy_debug(sdata->local->hw.wiphy,
2343 "%s: driver requested disconnect after resume.\n",
2344 sdata->name);
2345#endif
2346 ieee80211_sta_connection_lost(sdata,
2347 ifmgd->associated->bssid,
2348 WLAN_REASON_UNSPECIFIED);
2349 mutex_unlock(&ifmgd->mtx);
2350 return;
2351 }
2352 mutex_unlock(&ifmgd->mtx);
2353 }
2354
5bb644a0
JB		 2355 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2356 add_timer(&ifmgd->timer);
2357 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2358 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2359 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2360 ieee80211_restart_sta_timer(sdata);
a6af1d84 2361 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2362}
2363#endif
2364
9c6bd790
JB		 2365/* interface setup */
2366void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2367{
46900298 2368 struct ieee80211_if_managed *ifmgd;
988c0f72 2369
46900298 2370 ifmgd = &sdata->u.mgd;
b291ba11 2371 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2372 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2373 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2374 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2375 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2376 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2377 (unsigned long) sdata);
b291ba11
JB		 2378 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2379 (unsigned long) sdata);
2380 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2381 (unsigned long) sdata);
46900298 2382 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2383 (unsigned long) sdata);
9c6bd790 2384
ab1faead 2385 ifmgd->flags = 0;
1478acb3 2386 ifmgd->powersave = sdata->wdev.ps;
bbbdff9e 2387
77fdaa12 2388 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2389
2390 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2391 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2392 else
2393 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2394}
2395
77fdaa12
JB		 2396/* scan finished notification */
2397void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2398{
77fdaa12 2399 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2400
77fdaa12
JB		 2401 /* Restart STA timers */
2402 rcu_read_lock();
2403 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2404 ieee80211_restart_sta_timer(sdata);
2405 rcu_read_unlock();
2406}
60f8b39c 2407
77fdaa12
JB		 2408int ieee80211_max_network_latency(struct notifier_block *nb,
2409 unsigned long data, void *dummy)
2410{
2411 s32 latency_usec = (s32) data;
2412 struct ieee80211_local *local =
2413 container_of(nb, struct ieee80211_local,
2414 network_latency_notifier);
1fa6f4af 2415
77fdaa12
JB		 2416 mutex_lock(&local->iflist_mtx);
2417 ieee80211_recalc_ps(local, latency_usec);
2418 mutex_unlock(&local->iflist_mtx);
dfe67012 2419
77fdaa12 2420 return 0;
9c6bd790
JB		 2421}
2422
77fdaa12 2423/* config hooks */
af6b6374
JB		 2424static enum work_done_result
2425ieee80211_probe_auth_done(struct ieee80211_work *wk,
2426 struct sk_buff *skb)
2427{
b2abb6e2
JB		 2428 struct ieee80211_local *local = wk->sdata->local;
2429
af6b6374
JB		 2430 if (!skb) {
2431 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2432 goto destroy;
af6b6374
JB		 2433 }
2434
2435 if (wk->type == IEEE80211_WORK_AUTH) {
2436 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2437 goto destroy;
af6b6374
JB		 2438 }
2439
2440 mutex_lock(&wk->sdata->u.mgd.mtx);
2441 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2442 mutex_unlock(&wk->sdata->u.mgd.mtx);
2443
2444 wk->type = IEEE80211_WORK_AUTH;
2445 wk->probe_auth.tries = 0;
2446 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2447 destroy:
2448 if (wk->probe_auth.synced)
2449 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2450 IEEE80211_TX_SYNC_AUTH);
2451
2452 return WORK_DONE_DESTROY;
af6b6374
JB		 2453}
2454
77fdaa12
JB		 2455int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2456 struct cfg80211_auth_request *req)
9c6bd790 2457{
77fdaa12 2458 const u8 *ssid;
f679f65d 2459 struct ieee80211_work *wk;
77fdaa12 2460 u16 auth_alg;
9c6bd790 2461
77fdaa12
JB		 2462 switch (req->auth_type) {
2463 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2464 auth_alg = WLAN_AUTH_OPEN;
2465 break;
2466 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2467 if (IS_ERR(sdata->local->wep_tx_tfm))
2468 return -EOPNOTSUPP;
77fdaa12
JB		 2469 auth_alg = WLAN_AUTH_SHARED_KEY;
2470 break;
2471 case NL80211_AUTHTYPE_FT:
2472 auth_alg = WLAN_AUTH_FT;
2473 break;
2474 case NL80211_AUTHTYPE_NETWORK_EAP:
2475 auth_alg = WLAN_AUTH_LEAP;
2476 break;
2477 default:
2478 return -EOPNOTSUPP;
60f8b39c 2479 }
77fdaa12
JB		 2480
2481 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2482 if (!wk)
9c6bd790 2483 return -ENOMEM;
77fdaa12 2484
5e124bd5 2485 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2486
2487 if (req->ie && req->ie_len) {
2488 memcpy(wk->ie, req->ie, req->ie_len);
2489 wk->ie_len = req->ie_len;
9c6bd790 2490 }
77fdaa12 2491
fffd0934 2492 if (req->key && req->key_len) {
af6b6374
JB		 2493 wk->probe_auth.key_len = req->key_len;
2494 wk->probe_auth.key_idx = req->key_idx;
2495 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2496 }
2497
77fdaa12 2498 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2499 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2500 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2501
af6b6374
JB		 2502 wk->probe_auth.algorithm = auth_alg;
2503 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2504
070bb547
JB		 2505 /* if we already have a probe, don't probe again */
2506 if (req->bss->proberesp_ies)
2507 wk->type = IEEE80211_WORK_AUTH;
2508 else
2509 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2510 wk->chan = req->bss->channel;
4d51e149 2511 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2512 wk->sdata = sdata;
2513 wk->done = ieee80211_probe_auth_done;
77fdaa12 2514
af6b6374 2515 ieee80211_add_work(wk);
9c6bd790 2516 return 0;
60f8b39c
JB		 2517}
2518
2a33bee2
GE		 2519/* create and insert a dummy station entry */
2520static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2521 u8 *bssid) {
2522 struct sta_info *sta;
2523 int err;
2524
2525 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2526 if (!sta)
2a33bee2 2527 return -ENOMEM;
2a33bee2 2528
2a33bee2
GE		 2529 err = sta_info_insert(sta);
2530 sta = NULL;
2531 if (err) {
7852e361 2532 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2a33bee2
GE		 2533 " the AP (error %d)\n", sdata->name, err);
2534 return err;
2535 }
2536
2537 return 0;
2538}
2539
af6b6374
JB		 2540static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2541 struct sk_buff *skb)
2542{
b2abb6e2 2543 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2544 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2545 struct ieee80211_rx_status *rx_status;
2546 struct ieee802_11_elems elems;
2a33bee2 2547 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2548 u16 status;
2549
2550 if (!skb) {
2a33bee2 2551 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2552 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2553 goto destroy;
af6b6374
JB		 2554 }
2555
e5b900d2
JB		 2556 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2557 mutex_lock(&wk->sdata->u.mgd.mtx);
2558 rx_status = (void *) skb->cb;
2559 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2560 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2561 &elems, true);
2562 mutex_unlock(&wk->sdata->u.mgd.mtx);
2563
2564 wk->type = IEEE80211_WORK_ASSOC;
2565 /* not really done yet */
2566 return WORK_DONE_REQUEUE;
2567 }
2568
af6b6374
JB		 2569 mgmt = (void *)skb->data;
2570 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2571
2572 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2573 if (wk->assoc.synced)
2574 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2575 IEEE80211_TX_SYNC_ASSOC);
2576
af6b6374
JB		 2577 mutex_lock(&wk->sdata->u.mgd.mtx);
2578 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2579 mutex_unlock(&wk->sdata->u.mgd.mtx);
2580 /* oops -- internal error -- send timeout for now */
2a33bee2 2581 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2582 cfg80211_send_assoc_timeout(wk->sdata->dev,
2583 wk->filter_ta);
2584 return WORK_DONE_DESTROY;
2585 }
68542962
JO		 2586
2587 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2588 } else {
2589 /* assoc failed - destroy the dummy station entry */
2590 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2591 }
2592
95de817b 2593 cfg80211_send_rx_assoc(wk->sdata->dev, cbss, skb->data, skb->len);
b2abb6e2
JB		 2594 destroy:
2595 if (wk->assoc.synced)
2596 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2597 IEEE80211_TX_SYNC_ASSOC);
2598
af6b6374
JB		 2599 return WORK_DONE_DESTROY;
2600}
2601
77fdaa12
JB		 2602int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2603 struct cfg80211_assoc_request *req)
f0706e82 2604{
77fdaa12 2605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2606 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2607 struct ieee80211_work *wk;
63f170e0 2608 const u8 *ssid;
2a33bee2 2609 int i, err;
f0706e82 2610
77fdaa12 2611 mutex_lock(&ifmgd->mtx);
af6b6374 2612 if (ifmgd->associated) {
9c87ba67
JM		 2613 if (!req->prev_bssid ||
2614 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2615 ETH_ALEN)) {
2616 /*
2617 * We are already associated and the request was not a
2618 * reassociation request from the current BSS, so
2619 * reject it.
2620 */
2621 mutex_unlock(&ifmgd->mtx);
2622 return -EALREADY;
2623 }
2624
2625 /* Trying to reassociate - clear previous association state */
53f73c09 2626 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2627 }
2628 mutex_unlock(&ifmgd->mtx);
77fdaa12 2629
63f170e0 2630 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2631 if (!wk)
2632 return -ENOMEM;
77fdaa12 2633
2a33bee2
GE		 2634 /*
2635 * create a dummy station info entry in order
2636 * to start accepting incoming EAPOL packets from the station
2637 */
2638 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2639 if (err) {
2640 kfree(wk);
2641 return err;
2642 }
2643
77fdaa12 2644 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2645 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2646
d8ec4433
JO		 2647 ifmgd->beacon_crc_valid = false;
2648
77fdaa12
JB		 2649 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2650 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2651 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2652 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2653 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2654
77fdaa12 2655
ef96a842
BG		 2656 if (req->flags & ASSOC_REQ_DISABLE_HT)
2657 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2658
2659 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
2660 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
2661 sizeof(ifmgd->ht_capa_mask));
2662
77fdaa12
JB		 2663 if (req->ie && req->ie_len) {
2664 memcpy(wk->ie, req->ie, req->ie_len);
2665 wk->ie_len = req->ie_len;
2666 } else
2667 wk->ie_len = 0;
2668
0c1ad2ca 2669 wk->assoc.bss = req->bss;
f679f65d 2670
af6b6374 2671 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2672
af6b6374
JB		 2673 /* new association always uses requested smps mode */
2674 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2675 if (ifmgd->powersave)
2676 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2677 else
2678 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2679 } else
2680 ifmgd->ap_smps = ifmgd->req_smps;
2681
2682 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2683 /*
2684 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2685 * We still associate in non-HT mode (11a/b/g) if any one of these
2686 * ciphers is configured as pairwise.
2687 * We can set this to true for non-11n hardware, that'll be checked
2688 * separately along with the peer capabilities.
2689 */
af6b6374 2690 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2691 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2692 wk->assoc.wmm_used = bss->wmm_used;
2693 wk->assoc.supp_rates = bss->supp_rates;
2694 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2695 wk->assoc.ht_information_ie =
2696 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2697
ab13315a
KV		 2698 if (bss->wmm_used && bss->uapsd_supported &&
2699 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2700 wk->assoc.uapsd_used = true;
2701 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2702 } else {
2703 wk->assoc.uapsd_used = false;
2704 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2705 }
2706
63f170e0 2707 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2708 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2709 wk->assoc.ssid_len = ssid[1];
63f170e0 2710
77fdaa12 2711 if (req->prev_bssid)
f679f65d 2712 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2713
f679f65d 2714 wk->chan = req->bss->channel;
4d51e149 2715 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2716 wk->sdata = sdata;
2717 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2718 if (!bss->dtim_period &&
2719 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2720 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2721 else
2722 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2723
2724 if (req->use_mfp) {
2725 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2726 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2727 } else {
2728 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2729 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2730 }
2731
2732 if (req->crypto.control_port)
2733 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2734 else
2735 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2736
a621fa4d
JB		 2737 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2738 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2739
af6b6374
JB		 2740 ieee80211_add_work(wk);
2741 return 0;
f0706e82
JB		 2742}
2743
77fdaa12 2744int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2745 struct cfg80211_deauth_request *req,
2746 void *cookie)
f0706e82 2747{
af6b6374 2748 struct ieee80211_local *local = sdata->local;
46900298 2749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
05e48e8e 2750 bool assoc_bss = false;
f0706e82 2751
77fdaa12
JB		 2752 mutex_lock(&ifmgd->mtx);
2753
95de817b
JB		 2754 if (ifmgd->associated &&
2755 memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0) {
53f73c09 2756 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2757 mutex_unlock(&ifmgd->mtx);
05e48e8e 2758 assoc_bss = true;
af6b6374
JB		 2759 } else {
2760 bool not_auth_yet = false;
bc4934bc 2761 struct ieee80211_work *tmp, *wk = NULL;
f0706e82 2762
a58ce43f 2763 mutex_unlock(&ifmgd->mtx);
a58ce43f 2764
a1699b75 2765 mutex_lock(&local->mtx);
bc4934bc
JB		 2766 list_for_each_entry(tmp, &local->work_list, list) {
2767 if (tmp->sdata != sdata)
af6b6374 2768 continue;
29165e4c 2769
bc4934bc
JB		 2770 if (tmp->type != IEEE80211_WORK_DIRECT_PROBE &&
2771 tmp->type != IEEE80211_WORK_AUTH &&
2772 tmp->type != IEEE80211_WORK_ASSOC &&
2773 tmp->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2774 continue;
2775
95de817b 2776 if (memcmp(req->bssid, tmp->filter_ta, ETH_ALEN))
af6b6374 2777 continue;
29165e4c 2778
bc4934bc
JB		 2779 not_auth_yet = tmp->type == IEEE80211_WORK_DIRECT_PROBE;
2780 list_del_rcu(&tmp->list);
2781 synchronize_rcu();
2782 wk = tmp;
af6b6374
JB		 2783 break;
2784 }
a1699b75 2785 mutex_unlock(&local->mtx);
af6b6374 2786
bc4934bc
JB		 2787 if (wk && wk->type == IEEE80211_WORK_ASSOC) {
2788 /* clean up dummy sta & TX sync */
2789 sta_info_destroy_addr(wk->sdata, wk->filter_ta);
2790 if (wk->assoc.synced)
2791 drv_finish_tx_sync(local, wk->sdata,
2792 wk->filter_ta,
2793 IEEE80211_TX_SYNC_ASSOC);
2794 } else if (wk && wk->type == IEEE80211_WORK_AUTH) {
2795 if (wk->probe_auth.synced)
2796 drv_finish_tx_sync(local, wk->sdata,
2797 wk->filter_ta,
2798 IEEE80211_TX_SYNC_AUTH);
2799 }
2800 kfree(wk);
2801
af6b6374
JB		 2802 /*
2803 * If somebody requests authentication and we haven't
2804 * sent out an auth frame yet there's no need to send
2805 * out a deauth frame either. If the state was PROBE,
2806 * then this is the case. If it's AUTH we have sent a
2807 * frame, and if it's IDLE we have completed the auth
2808 * process already.
2809 */
95de817b 2810 if (not_auth_yet)
af6b6374 2811 return 0;
af6b6374 2812 }
77fdaa12 2813
0ff71613 2814 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
95de817b 2815 sdata->name, req->bssid, req->reason_code);
0ff71613 2816
95de817b
JB		 2817 ieee80211_send_deauth_disassoc(sdata, req->bssid, IEEE80211_STYPE_DEAUTH,
2818 req->reason_code, cookie, true);
05e48e8e 2819 if (assoc_bss)
07ba55d7 2820 sta_info_flush(sdata->local, sdata);
f0706e82 2821
7da7cc1d 2822 mutex_lock(&sdata->local->mtx);
bc83b681 2823 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2824 mutex_unlock(&sdata->local->mtx);
bc83b681 2825
f0706e82
JB		 2826 return 0;
2827}
84363e6e 2828
77fdaa12 2829int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2830 struct cfg80211_disassoc_request *req,
2831 void *cookie)
9c6bd790 2832{
77fdaa12 2833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2834 u8 bssid[ETH_ALEN];
9c6bd790 2835
77fdaa12 2836 mutex_lock(&ifmgd->mtx);
10f644a4 2837
8d8b261a
JB		 2838 /*
2839 * cfg80211 should catch this ... but it's racy since
2840 * we can receive a disassoc frame, process it, hand it
2841 * to cfg80211 while that's in a locked section already
2842 * trying to tell us that the user wants to disconnect.
2843 */
0c1ad2ca 2844 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2845 mutex_unlock(&ifmgd->mtx);
2846 return -ENOLINK;
2847 }
2848
0ff71613 2849 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2850 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2851
e69e95db 2852 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2853 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2854
2855 mutex_unlock(&ifmgd->mtx);
10f644a4 2856
77fdaa12 2857 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2858 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2859 cookie, !req->local_state_change);
07ba55d7 2860 sta_info_flush(sdata->local, sdata);
bc83b681 2861
7da7cc1d 2862 mutex_lock(&sdata->local->mtx);
bc83b681 2863 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2864 mutex_unlock(&sdata->local->mtx);
bc83b681 2865
10f644a4
JB		 2866 return 0;
2867}
026331c4 2868
a97c13c3
JO		 2869void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2870 enum nl80211_cqm_rssi_threshold_event rssi_event,
2871 gfp_t gfp)
2872{
2873 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2874
b5878a2d
JB		 2875 trace_api_cqm_rssi_notify(sdata, rssi_event);
2876
a97c13c3
JO		 2877 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2878}
2879EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2880
2881unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2882{
2883 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2884 return sdata->dev->operstate;
2885}
2886EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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