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mac80211: check channel switch mode for future frames transmit
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
a43abf29 30#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB		 31
32/*
33 * beacon loss detection timeout
34 * XXX: should depend on beacon interval
35 */
36#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
37/*
38 * Time the connection can be idle before we probe
39 * it to see if we can still talk to the AP.
40 */
d1c5091f 41#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 42/*
43 * Time we wait for a probe response after sending
44 * a probe request because of beacon loss or for
45 * checking the connection still works.
46 */
d1c5091f 47#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 48
17e4ec14
JM		 49/*
50 * Weight given to the latest Beacon frame when calculating average signal
51 * strength for Beacon frames received in the current BSS. This must be
52 * between 1 and 15.
53 */
54#define IEEE80211_SIGNAL_AVE_WEIGHT 3
55
5bb644a0
JB		 56#define TMR_RUNNING_TIMER 0
57#define TMR_RUNNING_CHANSW 1
58
77fdaa12
JB		 59/*
60 * All cfg80211 functions have to be called outside a locked
61 * section so that they can acquire a lock themselves... This
62 * is much simpler than queuing up things in cfg80211, but we
63 * do need some indirection for that here.
64 */
65enum rx_mgmt_action {
66 /* no action required */
67 RX_MGMT_NONE,
68
69 /* caller must call cfg80211_send_rx_auth() */
70 RX_MGMT_CFG80211_AUTH,
71
72 /* caller must call cfg80211_send_rx_assoc() */
73 RX_MGMT_CFG80211_ASSOC,
74
75 /* caller must call cfg80211_send_deauth() */
76 RX_MGMT_CFG80211_DEAUTH,
77
78 /* caller must call cfg80211_send_disassoc() */
79 RX_MGMT_CFG80211_DISASSOC,
80
5d1ec85f
JB		 81 /* caller must tell cfg80211 about internal error */
82 RX_MGMT_CFG80211_ASSOC_ERROR,
77fdaa12
JB		 83};
84
5484e237 85/* utils */
77fdaa12
JB		 86static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
87{
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
89}
90
ca386f31
JB		 91/*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
101static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
103{
104 ASSERT_MGD_MTX(ifmgd);
105
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
109}
110
b291ba11
JB		 111static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
112{
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
114 return;
115
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
118}
119
5484e237 120static int ecw2cw(int ecw)
60f8b39c 121{
5484e237 122 return (1 << ecw) - 1;
60f8b39c
JB		 123}
124
d5522e03
JB		 125/*
126 * ieee80211_enable_ht should be called only after the operating band
127 * has been determined as ht configuration depends on the hw's
128 * HT abilities for a specific band.
129 */
130static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
131 struct ieee80211_ht_info *hti,
77fdaa12 132 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 133{
134 struct ieee80211_local *local = sdata->local;
135 struct ieee80211_supported_band *sband;
d5522e03
JB		 136 struct sta_info *sta;
137 u32 changed = 0;
9ed6bcce 138 u16 ht_opmode;
0aaffa9b
JB		 139 bool enable_ht = true;
140 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 141 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
142
143 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
144
0aaffa9b
JB		 145 prev_chantype = sdata->vif.bss_conf.channel_type;
146
d5522e03
JB		 147 /* HT is not supported */
148 if (!sband->ht_cap.ht_supported)
149 enable_ht = false;
150
151 /* check that channel matches the right operating channel */
152 if (local->hw.conf.channel->center_freq !=
153 ieee80211_channel_to_frequency(hti->control_chan))
154 enable_ht = false;
155
156 if (enable_ht) {
157 channel_type = NL80211_CHAN_HT20;
158
159 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
160 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
161 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
162 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
163 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 164 if (!(local->hw.conf.channel->flags &
165 IEEE80211_CHAN_NO_HT40PLUS))
166 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 167 break;
168 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 169 if (!(local->hw.conf.channel->flags &
170 IEEE80211_CHAN_NO_HT40MINUS))
171 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 172 break;
173 }
174 }
175 }
176
fe6f212c
RC		 177 if (local->tmp_channel)
178 local->tmp_channel_type = channel_type;
d5522e03 179
0aaffa9b
JB		 180 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
181 /* can only fail due to HT40+/- mismatch */
182 channel_type = NL80211_CHAN_HT20;
183 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
184 }
d5522e03 185
0aaffa9b
JB		 186 /* channel_type change automatically detected */
187 ieee80211_hw_config(local, 0);
188
189 if (prev_chantype != channel_type) {
d5522e03 190 rcu_read_lock();
abe60632 191 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 192 if (sta)
193 rate_control_rate_update(local, sband, sta,
4fa00437 194 IEEE80211_RC_HT_CHANGED,
0aaffa9b 195 channel_type);
d5522e03 196 rcu_read_unlock();
0aaffa9b 197 }
d5522e03 198
9ed6bcce 199 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 200
201 /* if bss configuration changed store the new one */
0aaffa9b
JB		 202 if (sdata->ht_opmode_valid != enable_ht ||
203 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
204 prev_chantype != channel_type) {
d5522e03 205 changed |= BSS_CHANGED_HT;
9ed6bcce 206 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 207 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 208 }
209
210 return changed;
211}
212
9c6bd790
JB		 213/* frame sending functions */
214
ef422bc0 215static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 216 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 217 void *cookie, bool send_frame)
9ac19a90
JB		 218{
219 struct ieee80211_local *local = sdata->local;
46900298 220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 221 struct sk_buff *skb;
222 struct ieee80211_mgmt *mgmt;
9aed3cc1 223
65fc73ac 224 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 225 if (!skb) {
ef422bc0 226 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 227 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 228 return;
229 }
230 skb_reserve(skb, local->hw.extra_tx_headroom);
231
232 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
233 memset(mgmt, 0, 24);
77fdaa12 234 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 235 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 236 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 237 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 238 skb_put(skb, 2);
ef422bc0 239 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 240 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
241
53b46b84 242 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 243 if (cookie)
244 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
245 else
246 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 247 else
ce470613
HS		 248 if (cookie)
249 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
250 else
251 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 252 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
253 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 254
255 if (send_frame)
256 ieee80211_tx_skb(sdata, skb);
257 else
258 kfree_skb(skb);
9ac19a90
JB		 259}
260
572e0012
KV		 261void ieee80211_send_pspoll(struct ieee80211_local *local,
262 struct ieee80211_sub_if_data *sdata)
263{
572e0012
KV		 264 struct ieee80211_pspoll *pspoll;
265 struct sk_buff *skb;
572e0012 266
d8cd189e
KV		 267 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
268 if (!skb)
572e0012 269 return;
572e0012 270
d8cd189e
KV		 271 pspoll = (struct ieee80211_pspoll *) skb->data;
272 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 273
62ae67be
JB		 274 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
275 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 276}
277
965bedad
JB		 278void ieee80211_send_nullfunc(struct ieee80211_local *local,
279 struct ieee80211_sub_if_data *sdata,
280 int powersave)
281{
282 struct sk_buff *skb;
d8cd189e 283 struct ieee80211_hdr_3addr *nullfunc;
965bedad 284
d8cd189e
KV		 285 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
286 if (!skb)
965bedad 287 return;
965bedad 288
d8cd189e 289 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 290 if (powersave)
d8cd189e 291 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 292
62ae67be
JB		 293 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
294 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 295}
296
d524215f
FF		 297static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
298 struct ieee80211_sub_if_data *sdata)
299{
300 struct sk_buff *skb;
301 struct ieee80211_hdr *nullfunc;
302 __le16 fc;
303
304 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
305 return;
306
307 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
308 if (!skb) {
309 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
310 "nullfunc frame\n", sdata->name);
311 return;
312 }
313 skb_reserve(skb, local->hw.extra_tx_headroom);
314
315 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
316 memset(nullfunc, 0, 30);
317 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
318 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
319 nullfunc->frame_control = fc;
320 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
321 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
322 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
323 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
324
325 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
326 ieee80211_tx_skb(sdata, skb);
327}
328
cc32abd4
JB		 329/* spectrum management related things */
330static void ieee80211_chswitch_work(struct work_struct *work)
331{
332 struct ieee80211_sub_if_data *sdata =
333 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 334 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
335
9607e6b6 336 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 337 return;
338
77fdaa12
JB		 339 mutex_lock(&ifmgd->mtx);
340 if (!ifmgd->associated)
341 goto out;
cc32abd4
JB		 342
343 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 344 if (!sdata->local->ops->channel_switch) {
345 /* call "hw_config" only if doing sw channel switch */
346 ieee80211_hw_config(sdata->local,
347 IEEE80211_CONF_CHANGE_CHANNEL);
348 }
77fdaa12 349
cc32abd4 350 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 351 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 352
cc32abd4
JB		 353 ieee80211_wake_queues_by_reason(&sdata->local->hw,
354 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 355 out:
356 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
357 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 358}
359
5ce6e438
JB		 360void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
361{
362 struct ieee80211_sub_if_data *sdata;
363 struct ieee80211_if_managed *ifmgd;
364
365 sdata = vif_to_sdata(vif);
366 ifmgd = &sdata->u.mgd;
367
368 trace_api_chswitch_done(sdata, success);
369 if (!success) {
370 /*
371 * If the channel switch was not successful, stay
372 * around on the old channel. We currently lack
373 * good handling of this situation, possibly we
374 * should just drop the association.
375 */
376 sdata->local->csa_channel = sdata->local->oper_channel;
377 }
378
379 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
380}
381EXPORT_SYMBOL(ieee80211_chswitch_done);
382
cc32abd4
JB		 383static void ieee80211_chswitch_timer(unsigned long data)
384{
385 struct ieee80211_sub_if_data *sdata =
386 (struct ieee80211_sub_if_data *) data;
387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
388
5bb644a0
JB		 389 if (sdata->local->quiescing) {
390 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
391 return;
392 }
393
42935eca 394 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 395}
396
397void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
398 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 399 struct ieee80211_bss *bss,
400 u64 timestamp)
cc32abd4 401{
0c1ad2ca
JB		 402 struct cfg80211_bss *cbss =
403 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 404 struct ieee80211_channel *new_ch;
405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
406 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
407
77fdaa12
JB		 408 ASSERT_MGD_MTX(ifmgd);
409
410 if (!ifmgd->associated)
cc32abd4
JB		 411 return;
412
fbe9c429 413 if (sdata->local->scanning)
cc32abd4
JB		 414 return;
415
416 /* Disregard subsequent beacons if we are already running a timer
417 processing a CSA */
418
419 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
420 return;
421
422 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
423 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
424 return;
425
426 sdata->local->csa_channel = new_ch;
427
5ce6e438
JB		 428 if (sdata->local->ops->channel_switch) {
429 /* use driver's channel switch callback */
430 struct ieee80211_channel_switch ch_switch;
431 memset(&ch_switch, 0, sizeof(ch_switch));
432 ch_switch.timestamp = timestamp;
433 if (sw_elem->mode) {
434 ch_switch.block_tx = true;
435 ieee80211_stop_queues_by_reason(&sdata->local->hw,
436 IEEE80211_QUEUE_STOP_REASON_CSA);
437 }
438 ch_switch.channel = new_ch;
439 ch_switch.count = sw_elem->count;
440 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
441 drv_channel_switch(sdata->local, &ch_switch);
442 return;
443 }
444
445 /* channel switch handled in software */
cc32abd4 446 if (sw_elem->count <= 1) {
42935eca 447 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 448 } else {
9feaddc7
WYG		 449 if (sw_elem->mode)
450 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 451 IEEE80211_QUEUE_STOP_REASON_CSA);
452 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
453 mod_timer(&ifmgd->chswitch_timer,
454 jiffies +
455 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 456 cbss->beacon_interval));
cc32abd4
JB		 457 }
458}
459
460static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
461 u16 capab_info, u8 *pwr_constr_elem,
462 u8 pwr_constr_elem_len)
463{
464 struct ieee80211_conf *conf = &sdata->local->hw.conf;
465
466 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
467 return;
468
469 /* Power constraint IE length should be 1 octet */
470 if (pwr_constr_elem_len != 1)
471 return;
472
473 if ((*pwr_constr_elem <= conf->channel->max_power) &&
474 (*pwr_constr_elem != sdata->local->power_constr_level)) {
475 sdata->local->power_constr_level = *pwr_constr_elem;
476 ieee80211_hw_config(sdata->local, 0);
477 }
478}
479
965bedad
JB		 480/* powersave */
481static void ieee80211_enable_ps(struct ieee80211_local *local,
482 struct ieee80211_sub_if_data *sdata)
483{
484 struct ieee80211_conf *conf = &local->hw.conf;
485
d5edaedc
JB		 486 /*
487 * If we are scanning right now then the parameters will
488 * take effect when scan finishes.
489 */
fbe9c429 490 if (local->scanning)
d5edaedc
JB		 491 return;
492
965bedad
JB		 493 if (conf->dynamic_ps_timeout > 0 &&
494 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
495 mod_timer(&local->dynamic_ps_timer, jiffies +
496 msecs_to_jiffies(conf->dynamic_ps_timeout));
497 } else {
498 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
499 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 500
2a13052f
JO		 501 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
502 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
503 return;
504
505 conf->flags |= IEEE80211_CONF_PS;
506 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 507 }
508}
509
510static void ieee80211_change_ps(struct ieee80211_local *local)
511{
512 struct ieee80211_conf *conf = &local->hw.conf;
513
514 if (local->ps_sdata) {
965bedad
JB		 515 ieee80211_enable_ps(local, local->ps_sdata);
516 } else if (conf->flags & IEEE80211_CONF_PS) {
517 conf->flags &= ~IEEE80211_CONF_PS;
518 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
519 del_timer_sync(&local->dynamic_ps_timer);
520 cancel_work_sync(&local->dynamic_ps_enable_work);
521 }
522}
523
524/* need to hold RTNL or interface lock */
10f644a4 525void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 526{
527 struct ieee80211_sub_if_data *sdata, *found = NULL;
528 int count = 0;
195e294d 529 int timeout;
965bedad
JB		 530
531 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
532 local->ps_sdata = NULL;
533 return;
534 }
535
af6b6374
JB		 536 if (!list_empty(&local->work_list)) {
537 local->ps_sdata = NULL;
538 goto change;
539 }
540
965bedad 541 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 542 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 543 continue;
544 if (sdata->vif.type != NL80211_IFTYPE_STATION)
545 continue;
546 found = sdata;
547 count++;
548 }
549
43f78531 550 if (count == 1 && found->u.mgd.powersave &&
af6b6374 551 found->u.mgd.associated &&
56007a02 552 found->u.mgd.associated->beacon_ies &&
b291ba11
JB		 553 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
554 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 555 s32 beaconint_us;
556
557 if (latency < 0)
558 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
559
560 beaconint_us = ieee80211_tu_to_usec(
561 found->vif.bss_conf.beacon_int);
562
195e294d
JO		 563 timeout = local->hw.conf.dynamic_ps_forced_timeout;
564 if (timeout < 0) {
565 /*
566 * The 2 second value is there for compatibility until
567 * the PM_QOS_NETWORK_LATENCY is configured with real
568 * values.
569 */
570 if (latency == 2000000000)
571 timeout = 100;
572 else if (latency <= 50000)
573 timeout = 300;
574 else if (latency <= 100000)
575 timeout = 100;
576 else if (latency <= 500000)
577 timeout = 50;
578 else
579 timeout = 0;
580 }
581 local->hw.conf.dynamic_ps_timeout = timeout;
582
04fe2037 583 if (beaconint_us > latency) {
10f644a4 584 local->ps_sdata = NULL;
04fe2037 585 } else {
56007a02 586 struct ieee80211_bss *bss;
04fe2037 587 int maxslp = 1;
56007a02 588 u8 dtimper;
04fe2037 589
56007a02
JB		 590 bss = (void *)found->u.mgd.associated->priv;
591 dtimper = bss->dtim_period;
592
593 /* If the TIM IE is invalid, pretend the value is 1 */
594 if (!dtimper)
595 dtimper = 1;
596 else if (dtimper > 1)
04fe2037
JB		 597 maxslp = min_t(int, dtimper,
598 latency / beaconint_us);
599
9ccebe61 600 local->hw.conf.max_sleep_period = maxslp;
56007a02 601 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 602 local->ps_sdata = found;
04fe2037 603 }
10f644a4 604 } else {
965bedad 605 local->ps_sdata = NULL;
10f644a4 606 }
965bedad 607
af6b6374 608 change:
965bedad
JB		 609 ieee80211_change_ps(local);
610}
611
612void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
613{
614 struct ieee80211_local *local =
615 container_of(work, struct ieee80211_local,
616 dynamic_ps_disable_work);
617
618 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
619 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 }
622
623 ieee80211_wake_queues_by_reason(&local->hw,
624 IEEE80211_QUEUE_STOP_REASON_PS);
625}
626
627void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
628{
629 struct ieee80211_local *local =
630 container_of(work, struct ieee80211_local,
631 dynamic_ps_enable_work);
632 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
375177bf 633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad
JB		 634
635 /* can only happen when PS was just disabled anyway */
636 if (!sdata)
637 return;
638
639 if (local->hw.conf.flags & IEEE80211_CONF_PS)
640 return;
641
375177bf
VN		 642 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
643 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
965bedad
JB		 644 ieee80211_send_nullfunc(local, sdata, 1);
645
2a13052f
JO		 646 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
647 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 648 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
649 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
650 local->hw.conf.flags |= IEEE80211_CONF_PS;
651 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
652 }
965bedad
JB		 653}
654
655void ieee80211_dynamic_ps_timer(unsigned long data)
656{
657 struct ieee80211_local *local = (void *) data;
658
78f1a8b7 659 if (local->quiescing || local->suspended)
5bb644a0
JB		 660 return;
661
42935eca 662 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 663}
664
60f8b39c 665/* MLME */
f698d856 666static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 667 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 668 u8 *wmm_param, size_t wmm_param_len)
669{
f0706e82
JB		 670 struct ieee80211_tx_queue_params params;
671 size_t left;
672 int count;
ab13315a 673 u8 *pos, uapsd_queues = 0;
f0706e82 674
e1b3ec1a
SG		 675 if (!local->ops->conf_tx)
676 return;
677
af6b6374 678 if (local->hw.queues < 4)
3434fbd3
JB		 679 return;
680
681 if (!wmm_param)
682 return;
683
f0706e82
JB		 684 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
685 return;
ab13315a
KV		 686
687 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 688 uapsd_queues = local->uapsd_queues;
ab13315a 689
f0706e82 690 count = wmm_param[6] & 0x0f;
46900298 691 if (count == ifmgd->wmm_last_param_set)
f0706e82 692 return;
46900298 693 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 694
695 pos = wmm_param + 8;
696 left = wmm_param_len - 8;
697
698 memset(&params, 0, sizeof(params));
699
f0706e82
JB		 700 local->wmm_acm = 0;
701 for (; left >= 4; left -= 4, pos += 4) {
702 int aci = (pos[0] >> 5) & 0x03;
703 int acm = (pos[0] >> 4) & 0x01;
ab13315a 704 bool uapsd = false;
f0706e82
JB		 705 int queue;
706
707 switch (aci) {
0eeb59fe 708 case 1: /* AC_BK */
e100bb64 709 queue = 3;
988c0f72 710 if (acm)
0eeb59fe 711 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 712 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
713 uapsd = true;
f0706e82 714 break;
0eeb59fe 715 case 2: /* AC_VI */
e100bb64 716 queue = 1;
988c0f72 717 if (acm)
0eeb59fe 718 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 719 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
720 uapsd = true;
f0706e82 721 break;
0eeb59fe 722 case 3: /* AC_VO */
e100bb64 723 queue = 0;
988c0f72 724 if (acm)
0eeb59fe 725 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 726 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
727 uapsd = true;
f0706e82 728 break;
0eeb59fe 729 case 0: /* AC_BE */
f0706e82 730 default:
e100bb64 731 queue = 2;
988c0f72 732 if (acm)
0eeb59fe 733 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 734 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
735 uapsd = true;
f0706e82
JB		 736 break;
737 }
738
739 params.aifs = pos[0] & 0x0f;
740 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
741 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 742 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 743 params.uapsd = uapsd;
744
f4ea83dd 745#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 746 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
ab13315a 747 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
0bffe40f 748 wiphy_name(local->hw.wiphy), queue, aci, acm,
ab13315a
KV		 749 params.aifs, params.cw_min, params.cw_max, params.txop,
750 params.uapsd);
3330d7be 751#endif
e1b3ec1a 752 if (drv_conf_tx(local, queue, &params))
f0706e82 753 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 754 "parameters for queue %d\n",
755 wiphy_name(local->hw.wiphy), queue);
f0706e82 756 }
e1b3ec1a
SG		 757
758 /* enable WMM or activate new settings */
759 local->hw.conf.flags |= IEEE80211_CONF_QOS;
760 drv_config(local, IEEE80211_CONF_CHANGE_QOS);
f0706e82
JB		 761}
762
7a5158ef
JB		 763static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
764 u16 capab, bool erp_valid, u8 erp)
5628221c 765{
bda3933a 766 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 767 u32 changed = 0;
7a5158ef
JB		 768 bool use_protection;
769 bool use_short_preamble;
770 bool use_short_slot;
771
772 if (erp_valid) {
773 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
774 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
775 } else {
776 use_protection = false;
777 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
778 }
779
780 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 781 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
782 use_short_slot = true;
5628221c 783
471b3efd 784 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 785 bss_conf->use_cts_prot = use_protection;
786 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 787 }
7e9ed188 788
d43c7b37 789 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 790 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 791 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 792 }
d9430a32 793
7a5158ef 794 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 795 bss_conf->use_short_slot = use_short_slot;
796 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 797 }
798
799 return changed;
800}
801
f698d856 802static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 803 struct cfg80211_bss *cbss,
ae5eb026 804 u32 bss_info_changed)
f0706e82 805{
0c1ad2ca 806 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 807 struct ieee80211_local *local = sdata->local;
d6f2da5b 808
ae5eb026 809 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 810 /* set timing information */
0c1ad2ca
JB		 811 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
812 sdata->vif.bss_conf.timestamp = cbss->tsf;
5628221c 813
77fdaa12
JB		 814 bss_info_changed |= BSS_CHANGED_BEACON_INT;
815 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 816 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 817
0c1ad2ca
JB		 818 sdata->u.mgd.associated = cbss;
819 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 820
17e4ec14
JM		 821 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
822
b291ba11
JB		 823 /* just to be sure */
824 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
825 IEEE80211_STA_BEACON_POLL);
826
0183826b
JB		 827 /*
828 * Always handle WMM once after association regardless
829 * of the first value the AP uses. Setting -1 here has
830 * that effect because the AP values is an unsigned
831 * 4-bit value.
832 */
833 sdata->u.mgd.wmm_last_param_set = -1;
834
9ac19a90 835 ieee80211_led_assoc(local, 1);
9306102e 836
bda3933a 837 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 838 /*
839 * For now just always ask the driver to update the basic rateset
840 * when we have associated, we aren't checking whether it actually
841 * changed or not.
842 */
ae5eb026 843 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 844
845 /* And the BSSID changed - we're associated now */
846 bss_info_changed |= BSS_CHANGED_BSSID;
847
a97c13c3
JO		 848 /* Tell the driver to monitor connection quality (if supported) */
849 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
850 sdata->vif.bss_conf.cqm_rssi_thold)
851 bss_info_changed |= BSS_CHANGED_CQM;
852
ae5eb026 853 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 854
056508dc
JB		 855 mutex_lock(&local->iflist_mtx);
856 ieee80211_recalc_ps(local, -1);
0f78231b 857 ieee80211_recalc_smps(local, sdata);
056508dc 858 mutex_unlock(&local->iflist_mtx);
e0cb686f 859
8a5b33f5 860 netif_tx_start_all_queues(sdata->dev);
9ac19a90 861 netif_carrier_on(sdata->dev);
f0706e82
JB		 862}
863
e69e95db
JM		 864static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
865 bool remove_sta)
aa458d17 866{
46900298 867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 868 struct ieee80211_local *local = sdata->local;
869 struct sta_info *sta;
e0cb686f 870 u32 changed = 0, config_changed = 0;
b291ba11 871 u8 bssid[ETH_ALEN];
aa458d17 872
77fdaa12
JB		 873 ASSERT_MGD_MTX(ifmgd);
874
b291ba11
JB		 875 if (WARN_ON(!ifmgd->associated))
876 return;
877
0c1ad2ca 878 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 879
77fdaa12
JB		 880 ifmgd->associated = NULL;
881 memset(ifmgd->bssid, 0, ETH_ALEN);
882
883 /*
884 * we need to commit the associated = NULL change because the
885 * scan code uses that to determine whether this iface should
886 * go to/wake up from powersave or not -- and could otherwise
887 * wake the queues erroneously.
888 */
889 smp_mb();
890
891 /*
892 * Thus, we can only afterwards stop the queues -- to account
893 * for the case where another CPU is finishing a scan at this
894 * time -- we don't want the scan code to enable queues.
895 */
aa458d17 896
8a5b33f5 897 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 898 netif_carrier_off(sdata->dev);
899
1fa6f4af 900 rcu_read_lock();
abe60632 901 sta = sta_info_get(sdata, bssid);
4cad6c7c
S		 902 if (sta) {
903 set_sta_flags(sta, WLAN_STA_DISASSOC);
1fa6f4af 904 ieee80211_sta_tear_down_BA_sessions(sta);
4cad6c7c 905 }
1fa6f4af 906 rcu_read_unlock();
aa458d17 907
f5e5bf25
TW		 908 changed |= ieee80211_reset_erp_info(sdata);
909
f5e5bf25 910 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 911 changed |= BSS_CHANGED_ASSOC;
912 sdata->vif.bss_conf.assoc = false;
f5e5bf25 913
aa837e1d
JB		 914 ieee80211_set_wmm_default(sdata);
915
4797938c 916 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 917 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 918
413ad50a
JB		 919 /* on the next assoc, re-program HT parameters */
920 sdata->ht_opmode_valid = false;
921
a8302de9
VT		 922 local->power_constr_level = 0;
923
520eb820
KV		 924 del_timer_sync(&local->dynamic_ps_timer);
925 cancel_work_sync(&local->dynamic_ps_enable_work);
926
e0cb686f
KV		 927 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
928 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
929 config_changed |= IEEE80211_CONF_CHANGE_PS;
930 }
ae5eb026 931
e0cb686f 932 ieee80211_hw_config(local, config_changed);
9cef8737 933
0aaffa9b
JB		 934 /* The BSSID (not really interesting) and HT changed */
935 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 936 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 937
e69e95db
JM		 938 if (remove_sta)
939 sta_info_destroy_addr(sdata, bssid);
aa458d17 940}
f0706e82 941
3cf335d5
KV		 942void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
943 struct ieee80211_hdr *hdr)
944{
945 /*
946 * We can postpone the mgd.timer whenever receiving unicast frames
947 * from AP because we know that the connection is working both ways
948 * at that time. But multicast frames (and hence also beacons) must
949 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 950 * data idle periods for sending the periodic probe request to the
951 * AP we're connected to.
3cf335d5 952 */
b291ba11
JB		 953 if (is_multicast_ether_addr(hdr->addr1))
954 return;
955
1e4dcd01
JO		 956 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
957 return;
958
b291ba11
JB		 959 mod_timer(&sdata->u.mgd.conn_mon_timer,
960 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 961}
f0706e82 962
a43abf29
ML		 963static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
964{
965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
966 const u8 *ssid;
967
0c1ad2ca
JB		 968 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
969 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
a43abf29
ML		 970 ssid + 2, ssid[1], NULL, 0);
971
972 ifmgd->probe_send_count++;
973 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
974 run_again(ifmgd, ifmgd->probe_timeout);
975}
976
b291ba11
JB		 977static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
978 bool beacon)
04de8381 979{
04de8381 980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 981 bool already = false;
34bfc411 982
9607e6b6 983 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 984 return;
985
91a3bd76
LR		 986 if (sdata->local->scanning)
987 return;
988
b8bc4b0a
JB		 989 if (sdata->local->tmp_channel)
990 return;
991
77fdaa12
JB		 992 mutex_lock(&ifmgd->mtx);
993
994 if (!ifmgd->associated)
995 goto out;
996
a860402d 997#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 998 if (beacon && net_ratelimit())
999 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1000 "- sending probe request\n", sdata->name);
a860402d 1001#endif
04de8381 1002
b291ba11
JB		 1003 /*
1004 * The driver/our work has already reported this event or the
1005 * connection monitoring has kicked in and we have already sent
1006 * a probe request. Or maybe the AP died and the driver keeps
1007 * reporting until we disassociate...
1008 *
1009 * In either case we have to ignore the current call to this
1010 * function (except for setting the correct probe reason bit)
1011 * because otherwise we would reset the timer every time and
1012 * never check whether we received a probe response!
1013 */
1014 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1015 IEEE80211_STA_CONNECTION_POLL))
1016 already = true;
1017
1018 if (beacon)
1019 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1020 else
1021 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1022
1023 if (already)
1024 goto out;
1025
4e751843
JB		 1026 mutex_lock(&sdata->local->iflist_mtx);
1027 ieee80211_recalc_ps(sdata->local, -1);
1028 mutex_unlock(&sdata->local->iflist_mtx);
1029
a43abf29
ML		 1030 ifmgd->probe_send_count = 0;
1031 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1032 out:
1033 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1034}
1035
1e4dcd01
JO		 1036static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1037{
1038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1039 struct ieee80211_local *local = sdata->local;
1040 u8 bssid[ETH_ALEN];
1041
1042 mutex_lock(&ifmgd->mtx);
1043 if (!ifmgd->associated) {
1044 mutex_unlock(&ifmgd->mtx);
1045 return;
1046 }
1047
1048 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1049
1050 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1051
e69e95db 1052 ieee80211_set_disassoc(sdata, true);
1e4dcd01
JO		 1053 ieee80211_recalc_idle(local);
1054 mutex_unlock(&ifmgd->mtx);
1055 /*
1056 * must be outside lock due to cfg80211,
1057 * but that's not a problem.
1058 */
1059 ieee80211_send_deauth_disassoc(sdata, bssid,
1060 IEEE80211_STYPE_DEAUTH,
1061 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1062 NULL, true);
1e4dcd01
JO		 1063}
1064
1065void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1066{
1067 struct ieee80211_sub_if_data *sdata =
1068 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1069 u.mgd.beacon_connection_loss_work);
b291ba11 1070
1e4dcd01
JO		 1071 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1072 __ieee80211_connection_loss(sdata);
1073 else
1074 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1075}
1076
04de8381
KV		 1077void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1078{
1079 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1080 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1081
b5878a2d
JB		 1082 trace_api_beacon_loss(sdata);
1083
1e4dcd01
JO		 1084 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1085 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1086}
1087EXPORT_SYMBOL(ieee80211_beacon_loss);
1088
1e4dcd01
JO		 1089void ieee80211_connection_loss(struct ieee80211_vif *vif)
1090{
1091 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1092 struct ieee80211_hw *hw = &sdata->local->hw;
1093
b5878a2d
JB		 1094 trace_api_connection_loss(sdata);
1095
1e4dcd01
JO		 1096 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1097 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1098}
1099EXPORT_SYMBOL(ieee80211_connection_loss);
1100
1101
77fdaa12
JB		 1102static enum rx_mgmt_action __must_check
1103ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1104 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1105{
46900298 1106 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1107 const u8 *bssid = NULL;
f0706e82
JB		 1108 u16 reason_code;
1109
f4ea83dd 1110 if (len < 24 + 2)
77fdaa12 1111 return RX_MGMT_NONE;
f0706e82 1112
77fdaa12
JB		 1113 ASSERT_MGD_MTX(ifmgd);
1114
0c1ad2ca 1115 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1116
1117 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1118
77fdaa12 1119 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1120 sdata->name, bssid, reason_code);
77fdaa12 1121
e69e95db 1122 ieee80211_set_disassoc(sdata, true);
63f170e0 1123 ieee80211_recalc_idle(sdata->local);
f0706e82 1124
77fdaa12 1125 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1126}
1127
1128
77fdaa12
JB		 1129static enum rx_mgmt_action __must_check
1130ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1131 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1132{
46900298 1133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1134 u16 reason_code;
1135
f4ea83dd 1136 if (len < 24 + 2)
77fdaa12 1137 return RX_MGMT_NONE;
f0706e82 1138
77fdaa12
JB		 1139 ASSERT_MGD_MTX(ifmgd);
1140
1141 if (WARN_ON(!ifmgd->associated))
1142 return RX_MGMT_NONE;
1143
0c1ad2ca 1144 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1145 return RX_MGMT_NONE;
f0706e82
JB		 1146
1147 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1148
0ff71613 1149 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1150 sdata->name, mgmt->sa, reason_code);
f0706e82 1151
e69e95db 1152 ieee80211_set_disassoc(sdata, true);
bc83b681 1153 ieee80211_recalc_idle(sdata->local);
77fdaa12 1154 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1155}
1156
1157
af6b6374
JB		 1158static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1159 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1160{
af6b6374 1161 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1163 struct ieee80211_local *local = sdata->local;
8318d78a 1164 struct ieee80211_supported_band *sband;
f0706e82 1165 struct sta_info *sta;
0c1ad2ca 1166 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1167 u8 *pos;
881d948c 1168 u32 rates, basic_rates;
af6b6374 1169 u16 capab_info, aid;
f0706e82 1170 struct ieee802_11_elems elems;
bda3933a 1171 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1172 u32 changed = 0;
5d1ec85f
JB		 1173 int i, j, err;
1174 bool have_higher_than_11mbit = false;
ae5eb026 1175 u16 ap_ht_cap_flags;
f0706e82 1176
af6b6374 1177 /* AssocResp and ReassocResp have identical structure */
f0706e82 1178
f0706e82 1179 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1180 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1181
1dd84aa2
JB		 1182 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1183 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1184 "set\n", sdata->name, aid);
1dd84aa2
JB		 1185 aid &= ~(BIT(15) | BIT(14));
1186
af6b6374
JB		 1187 pos = mgmt->u.assoc_resp.variable;
1188 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1189
f0706e82
JB		 1190 if (!elems.supp_rates) {
1191 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1192 sdata->name);
af6b6374 1193 return false;
f0706e82
JB		 1194 }
1195
46900298 1196 ifmgd->aid = aid;
f0706e82 1197
0c1ad2ca 1198 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
f0706e82 1199 if (!sta) {
5d1ec85f
JB		 1200 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1201 " the AP\n", sdata->name);
af6b6374 1202 return false;
77fdaa12 1203 }
05e5e883 1204
5d1ec85f
JB		 1205 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1206 WLAN_STA_ASSOC_AP);
1207 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1208 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1209
60f8b39c
JB		 1210 rates = 0;
1211 basic_rates = 0;
1212 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1213
60f8b39c
JB		 1214 for (i = 0; i < elems.supp_rates_len; i++) {
1215 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1216 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1217
60f8b39c
JB		 1218 if (rate > 110)
1219 have_higher_than_11mbit = true;
1220
1221 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1222 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1223 rates |= BIT(j);
d61272cb
TW		 1224 if (is_basic)
1225 basic_rates |= BIT(j);
1226 break;
1227 }
f709fc69 1228 }
f709fc69
LCC		 1229 }
1230
60f8b39c
JB		 1231 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1232 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1233 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1234
60f8b39c
JB		 1235 if (rate > 110)
1236 have_higher_than_11mbit = true;
f0706e82 1237
60f8b39c 1238 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1239 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1240 rates |= BIT(j);
d61272cb
TW		 1241 if (is_basic)
1242 basic_rates |= BIT(j);
1243 break;
1244 }
60f8b39c 1245 }
1ebebea8 1246 }
f0706e82 1247
323ce79a 1248 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1249 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1250
1251 /* cf. IEEE 802.11 9.2.12 */
1252 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1253 have_higher_than_11mbit)
1254 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1255 else
1256 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1257
ab1faead 1258 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1259 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1260 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1261
1262 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1263
4b7679a5 1264 rate_control_rate_init(sta);
f0706e82 1265
46900298 1266 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1267 set_sta_flags(sta, WLAN_STA_MFP);
1268
ddf4ac53 1269 if (elems.wmm_param)
60f8b39c 1270 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1271
5d1ec85f
JB		 1272 err = sta_info_insert(sta);
1273 sta = NULL;
1274 if (err) {
1275 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1276 " the AP (error %d)\n", sdata->name, err);
90be561b 1277 return false;
ddf4ac53
JB		 1278 }
1279
ddf4ac53 1280 if (elems.wmm_param)
46900298 1281 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1282 elems.wmm_param_len);
aa837e1d
JB		 1283 else
1284 ieee80211_set_wmm_default(sdata);
f0706e82 1285
e4da8c37
JB		 1286 local->oper_channel = wk->chan;
1287
ae5eb026 1288 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1289 (sdata->local->hw.queues >= 4) &&
ab1faead 1290 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1291 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
0c1ad2ca 1292 cbss->bssid, ap_ht_cap_flags);
ae5eb026 1293
60f8b39c
JB		 1294 /* set AID and assoc capability,
1295 * ieee80211_set_associated() will tell the driver */
1296 bss_conf->aid = aid;
1297 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1298 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1299
d524215f
FF		 1300 /*
1301 * If we're using 4-addr mode, let the AP know that we're
1302 * doing so, so that it can create the STA VLAN on its side
1303 */
1304 if (ifmgd->use_4addr)
1305 ieee80211_send_4addr_nullfunc(local, sdata);
1306
15b7b062 1307 /*
b291ba11
JB		 1308 * Start timer to probe the connection to the AP now.
1309 * Also start the timer that will detect beacon loss.
15b7b062 1310 */
b291ba11
JB		 1311 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1312 mod_beacon_timer(sdata);
15b7b062 1313
af6b6374 1314 return true;
f0706e82
JB		 1315}
1316
1317
98c8fccf
JB		 1318static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1319 struct ieee80211_mgmt *mgmt,
1320 size_t len,
1321 struct ieee80211_rx_status *rx_status,
1322 struct ieee802_11_elems *elems,
1323 bool beacon)
1324{
1325 struct ieee80211_local *local = sdata->local;
1326 int freq;
c2b13452 1327 struct ieee80211_bss *bss;
98c8fccf 1328 struct ieee80211_channel *channel;
56007a02
JB		 1329 bool need_ps = false;
1330
1331 if (sdata->u.mgd.associated) {
1332 bss = (void *)sdata->u.mgd.associated->priv;
1333 /* not previously set so we may need to recalc */
1334 need_ps = !bss->dtim_period;
1335 }
98c8fccf
JB		 1336
1337 if (elems->ds_params && elems->ds_params_len == 1)
1338 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1339 else
1340 freq = rx_status->freq;
1341
1342 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1343
1344 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1345 return;
1346
98c8fccf 1347 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1348 channel, beacon);
77fdaa12
JB		 1349 if (bss)
1350 ieee80211_rx_bss_put(local, bss);
1351
1352 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1353 return;
1354
56007a02
JB		 1355 if (need_ps) {
1356 mutex_lock(&local->iflist_mtx);
1357 ieee80211_recalc_ps(local, -1);
1358 mutex_unlock(&local->iflist_mtx);
1359 }
1360
c481ec97 1361 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1362 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1363 ETH_ALEN) == 0)) {
c481ec97
S		 1364 struct ieee80211_channel_sw_ie *sw_elem =
1365 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1366 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1367 bss, rx_status->mactime);
c481ec97 1368 }
f0706e82
JB		 1369}
1370
1371
f698d856 1372static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1373 struct sk_buff *skb)
f0706e82 1374{
af6b6374 1375 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1376 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1377 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1378 size_t baselen, len = skb->len;
ae6a44e3
EK		 1379 struct ieee802_11_elems elems;
1380
15b7b062
KV		 1381 ifmgd = &sdata->u.mgd;
1382
77fdaa12
JB		 1383 ASSERT_MGD_MTX(ifmgd);
1384
47846c9b 1385 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1386 return; /* ignore ProbeResp to foreign address */
1387
ae6a44e3
EK		 1388 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1389 if (baselen > len)
1390 return;
1391
1392 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1393 &elems);
1394
98c8fccf 1395 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1396
77fdaa12 1397 if (ifmgd->associated &&
0c1ad2ca 1398 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1399 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1400 IEEE80211_STA_CONNECTION_POLL)) {
1401 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1402 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1403 mutex_lock(&sdata->local->iflist_mtx);
1404 ieee80211_recalc_ps(sdata->local, -1);
1405 mutex_unlock(&sdata->local->iflist_mtx);
7bdfcaaf
JO		 1406
1407 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1408 return;
1409
b291ba11
JB		 1410 /*
1411 * We've received a probe response, but are not sure whether
1412 * we have or will be receiving any beacons or data, so let's
1413 * schedule the timers again, just in case.
1414 */
1415 mod_beacon_timer(sdata);
7bdfcaaf 1416
b291ba11
JB		 1417 mod_timer(&ifmgd->conn_mon_timer,
1418 round_jiffies_up(jiffies +
1419 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1420 }
f0706e82
JB		 1421}
1422
d91f36db
JB		 1423/*
1424 * This is the canonical list of information elements we care about,
1425 * the filter code also gives us all changes to the Microsoft OUI
1426 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1427 *
1428 * We implement beacon filtering in software since that means we can
1429 * avoid processing the frame here and in cfg80211, and userspace
1430 * will not be able to tell whether the hardware supports it or not.
1431 *
1432 * XXX: This list needs to be dynamic -- userspace needs to be able to
1433 * add items it requires. It also needs to be able to tell us to
1434 * look out for other vendor IEs.
1435 */
1436static const u64 care_about_ies =
1d4df3a5
JB		 1437 (1ULL << WLAN_EID_COUNTRY) |
1438 (1ULL << WLAN_EID_ERP_INFO) |
1439 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1440 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1441 (1ULL << WLAN_EID_HT_CAPABILITY) |
1442 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1443
f698d856 1444static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1445 struct ieee80211_mgmt *mgmt,
1446 size_t len,
1447 struct ieee80211_rx_status *rx_status)
1448{
d91f36db 1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1450 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1451 size_t baselen;
1452 struct ieee802_11_elems elems;
f698d856 1453 struct ieee80211_local *local = sdata->local;
471b3efd 1454 u32 changed = 0;
d91f36db 1455 bool erp_valid, directed_tim = false;
7a5158ef 1456 u8 erp_value = 0;
d91f36db 1457 u32 ncrc;
77fdaa12
JB		 1458 u8 *bssid;
1459
1460 ASSERT_MGD_MTX(ifmgd);
f0706e82 1461
ae6a44e3
EK		 1462 /* Process beacon from the current BSS */
1463 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1464 if (baselen > len)
1465 return;
1466
d91f36db 1467 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1468 return;
f0706e82 1469
b291ba11
JB		 1470 /*
1471 * We might have received a number of frames, among them a
1472 * disassoc frame and a beacon...
1473 */
1474 if (!ifmgd->associated)
77fdaa12
JB		 1475 return;
1476
0c1ad2ca 1477 bssid = ifmgd->associated->bssid;
77fdaa12 1478
b291ba11
JB		 1479 /*
1480 * And in theory even frames from a different AP we were just
1481 * associated to a split-second ago!
1482 */
1483 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1484 return;
1485
17e4ec14
JM		 1486 /* Track average RSSI from the Beacon frames of the current AP */
1487 ifmgd->last_beacon_signal = rx_status->signal;
1488 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1489 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1490 ifmgd->ave_beacon_signal = rx_status->signal;
1491 ifmgd->last_cqm_event_signal = 0;
1492 } else {
1493 ifmgd->ave_beacon_signal =
1494 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1495 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1496 ifmgd->ave_beacon_signal) / 16;
1497 }
1498 if (bss_conf->cqm_rssi_thold &&
1499 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1500 int sig = ifmgd->ave_beacon_signal / 16;
1501 int last_event = ifmgd->last_cqm_event_signal;
1502 int thold = bss_conf->cqm_rssi_thold;
1503 int hyst = bss_conf->cqm_rssi_hyst;
1504 if (sig < thold &&
1505 (last_event == 0 || sig < last_event - hyst)) {
1506 ifmgd->last_cqm_event_signal = sig;
1507 ieee80211_cqm_rssi_notify(
1508 &sdata->vif,
1509 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1510 GFP_KERNEL);
1511 } else if (sig > thold &&
1512 (last_event == 0 || sig > last_event + hyst)) {
1513 ifmgd->last_cqm_event_signal = sig;
1514 ieee80211_cqm_rssi_notify(
1515 &sdata->vif,
1516 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1517 GFP_KERNEL);
1518 }
1519 }
1520
b291ba11 1521 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1522#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1523 if (net_ratelimit()) {
1524 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1525 "to a received beacon\n", sdata->name);
92778180
JM		 1526 }
1527#endif
b291ba11 1528 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1529 mutex_lock(&local->iflist_mtx);
1530 ieee80211_recalc_ps(local, -1);
1531 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1532 }
1533
b291ba11
JB		 1534 /*
1535 * Push the beacon loss detection into the future since
1536 * we are processing a beacon from the AP just now.
1537 */
1538 mod_beacon_timer(sdata);
1539
d91f36db
JB		 1540 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1541 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1542 len - baselen, &elems,
1543 care_about_ies, ncrc);
1544
1545 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1546 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1547 ifmgd->aid);
d91f36db 1548
30196673
JM		 1549 if (ncrc != ifmgd->beacon_crc) {
1550 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1551 true);
d91f36db 1552
30196673
JM		 1553 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1554 elems.wmm_param_len);
1555 }
fe3fa827 1556
25c9c875 1557 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1558 if (directed_tim) {
572e0012
KV		 1559 if (local->hw.conf.dynamic_ps_timeout > 0) {
1560 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1561 ieee80211_hw_config(local,
1562 IEEE80211_CONF_CHANGE_PS);
1563 ieee80211_send_nullfunc(local, sdata, 0);
1564 } else {
1565 local->pspolling = true;
1566
1567 /*
1568 * Here is assumed that the driver will be
1569 * able to send ps-poll frame and receive a
1570 * response even though power save mode is
1571 * enabled, but some drivers might require
1572 * to disable power save here. This needs
1573 * to be investigated.
1574 */
1575 ieee80211_send_pspoll(local, sdata);
1576 }
a97b77b9
VN		 1577 }
1578 }
7a5158ef 1579
30196673
JM		 1580 if (ncrc == ifmgd->beacon_crc)
1581 return;
1582 ifmgd->beacon_crc = ncrc;
1583
7a5158ef
JB		 1584 if (elems.erp_info && elems.erp_info_len >= 1) {
1585 erp_valid = true;
1586 erp_value = elems.erp_info[0];
1587 } else {
1588 erp_valid = false;
50c4afb9 1589 }
7a5158ef
JB		 1590 changed |= ieee80211_handle_bss_capability(sdata,
1591 le16_to_cpu(mgmt->u.beacon.capab_info),
1592 erp_valid, erp_value);
f0706e82 1593
d3c990fb 1594
53d6f81c 1595 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1596 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1597 struct sta_info *sta;
1598 struct ieee80211_supported_band *sband;
1599 u16 ap_ht_cap_flags;
1600
1601 rcu_read_lock();
1602
abe60632 1603 sta = sta_info_get(sdata, bssid);
77fdaa12 1604 if (WARN_ON(!sta)) {
ae5eb026
JB		 1605 rcu_read_unlock();
1606 return;
1607 }
1608
1609 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1610
1611 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1612 elems.ht_cap_elem, &sta->sta.ht_cap);
1613
1614 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1615
1616 rcu_read_unlock();
1617
1618 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1619 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1620 }
1621
8b19e6ca 1622 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1623 if (elems.country_elem) {
a8302de9
VT		 1624 /* TODO: IBSS also needs this */
1625 if (elems.pwr_constr_elem)
1626 ieee80211_handle_pwr_constr(sdata,
1627 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1628 elems.pwr_constr_elem,
1629 elems.pwr_constr_elem_len);
3f2355cb
LR		 1630 }
1631
471b3efd 1632 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1633}
1634
46900298 1635ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1636 struct sk_buff *skb)
f0706e82 1637{
f698d856 1638 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1639 struct ieee80211_mgmt *mgmt;
1640 u16 fc;
1641
1642 if (skb->len < 24)
46900298 1643 return RX_DROP_MONITOR;
f0706e82
JB		 1644
1645 mgmt = (struct ieee80211_mgmt *) skb->data;
1646 fc = le16_to_cpu(mgmt->frame_control);
1647
1648 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1649 case IEEE80211_STYPE_PROBE_RESP:
1650 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1651 case IEEE80211_STYPE_DEAUTH:
1652 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1653 case IEEE80211_STYPE_ACTION:
46900298 1654 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1655 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1656 return RX_QUEUED;
f0706e82
JB		 1657 }
1658
46900298 1659 return RX_DROP_MONITOR;
f0706e82
JB		 1660}
1661
f698d856 1662static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1663 struct sk_buff *skb)
1664{
77fdaa12 1665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1666 struct ieee80211_rx_status *rx_status;
f0706e82 1667 struct ieee80211_mgmt *mgmt;
77fdaa12 1668 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1669 u16 fc;
1670
f0706e82
JB		 1671 rx_status = (struct ieee80211_rx_status *) skb->cb;
1672 mgmt = (struct ieee80211_mgmt *) skb->data;
1673 fc = le16_to_cpu(mgmt->frame_control);
1674
77fdaa12
JB		 1675 mutex_lock(&ifmgd->mtx);
1676
1677 if (ifmgd->associated &&
0c1ad2ca 1678 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1679 switch (fc & IEEE80211_FCTL_STYPE) {
1680 case IEEE80211_STYPE_BEACON:
1681 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1682 rx_status);
1683 break;
1684 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1685 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1686 break;
1687 case IEEE80211_STYPE_DEAUTH:
63f170e0 1688 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1689 break;
1690 case IEEE80211_STYPE_DISASSOC:
1691 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1692 break;
1693 case IEEE80211_STYPE_ACTION:
d7907448
FF		 1694 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1695 break;
1696
77fdaa12
JB		 1697 ieee80211_sta_process_chanswitch(sdata,
1698 &mgmt->u.action.u.chan_switch.sw_elem,
5ce6e438
JB		 1699 (void *)ifmgd->associated->priv,
1700 rx_status->mactime);
77fdaa12
JB		 1701 break;
1702 }
1703 mutex_unlock(&ifmgd->mtx);
1704
1705 switch (rma) {
1706 case RX_MGMT_NONE:
1707 /* no action */
1708 break;
1709 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1710 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1711 break;
1712 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1713 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1714 break;
1715 default:
1716 WARN(1, "unexpected: %d", rma);
1717 }
1718 goto out;
1719 }
1720
77fdaa12
JB		 1721 mutex_unlock(&ifmgd->mtx);
1722
63f170e0 1723 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
af6b6374 1724 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
ce470613 1725 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
f0706e82 1726
77fdaa12 1727 out:
f0706e82
JB		 1728 kfree_skb(skb);
1729}
1730
9c6bd790 1731static void ieee80211_sta_timer(unsigned long data)
f0706e82 1732{
60f8b39c
JB		 1733 struct ieee80211_sub_if_data *sdata =
1734 (struct ieee80211_sub_if_data *) data;
46900298 1735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1736 struct ieee80211_local *local = sdata->local;
f0706e82 1737
5bb644a0
JB		 1738 if (local->quiescing) {
1739 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1740 return;
1741 }
1742
42935eca 1743 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 1744}
1745
9c6bd790
JB		 1746static void ieee80211_sta_work(struct work_struct *work)
1747{
1748 struct ieee80211_sub_if_data *sdata =
46900298 1749 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1750 struct ieee80211_local *local = sdata->local;
46900298 1751 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB		 1752 struct sk_buff *skb;
1753
9607e6b6 1754 if (!ieee80211_sdata_running(sdata))
9c6bd790
JB		 1755 return;
1756
fbe9c429 1757 if (local->scanning)
9c6bd790
JB		 1758 return;
1759
46900298 1760 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1761 return;
5bb644a0
JB		 1762
1763 /*
42935eca
LR		 1764 * ieee80211_queue_work() should have picked up most cases,
1765 * here we'll pick the the rest.
5bb644a0 1766 */
42935eca
LR		 1767 if (WARN(local->suspended, "STA MLME work scheduled while "
1768 "going to suspend\n"))
5bb644a0
JB		 1769 return;
1770
46900298 1771 ifmgd = &sdata->u.mgd;
f0706e82 1772
77fdaa12 1773 /* first process frames to avoid timing out while a frame is pending */
46900298 1774 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1775 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1776
77fdaa12
JB		 1777 /* then process the rest of the work */
1778 mutex_lock(&ifmgd->mtx);
1779
b291ba11
JB		 1780 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1781 IEEE80211_STA_CONNECTION_POLL) &&
1782 ifmgd->associated) {
a43abf29
ML		 1783 u8 bssid[ETH_ALEN];
1784
0c1ad2ca 1785 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11
JB		 1786 if (time_is_after_jiffies(ifmgd->probe_timeout))
1787 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 1788
1789 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1790#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1791 printk(KERN_DEBUG "No probe response from AP %pM"
1792 " after %dms, try %d\n", bssid,
1793 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1794 ifmgd->probe_send_count);
1795#endif
1796 ieee80211_mgd_probe_ap_send(sdata);
1797 } else {
b291ba11
JB		 1798 /*
1799 * We actually lost the connection ... or did we?
1800 * Let's make sure!
1801 */
1802 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1803 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 1804 printk(KERN_DEBUG "No probe response from AP %pM"
1805 " after %dms, disconnecting.\n",
1806 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e69e95db 1807 ieee80211_set_disassoc(sdata, true);
bc83b681 1808 ieee80211_recalc_idle(local);
b291ba11
JB		 1809 mutex_unlock(&ifmgd->mtx);
1810 /*
1811 * must be outside lock due to cfg80211,
1812 * but that's not a problem.
1813 */
1814 ieee80211_send_deauth_disassoc(sdata, bssid,
1815 IEEE80211_STYPE_DEAUTH,
1816 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1817 NULL, true);
b291ba11
JB		 1818 mutex_lock(&ifmgd->mtx);
1819 }
1820 }
1821
77fdaa12 1822 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 1823}
1824
b291ba11
JB		 1825static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1826{
1827 struct ieee80211_sub_if_data *sdata =
1828 (struct ieee80211_sub_if_data *) data;
1829 struct ieee80211_local *local = sdata->local;
1830
1831 if (local->quiescing)
1832 return;
1833
1e4dcd01
JO		 1834 ieee80211_queue_work(&sdata->local->hw,
1835 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 1836}
1837
1838static void ieee80211_sta_conn_mon_timer(unsigned long data)
1839{
1840 struct ieee80211_sub_if_data *sdata =
1841 (struct ieee80211_sub_if_data *) data;
1842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1843 struct ieee80211_local *local = sdata->local;
1844
1845 if (local->quiescing)
1846 return;
1847
42935eca 1848 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 1849}
1850
1851static void ieee80211_sta_monitor_work(struct work_struct *work)
1852{
1853 struct ieee80211_sub_if_data *sdata =
1854 container_of(work, struct ieee80211_sub_if_data,
1855 u.mgd.monitor_work);
1856
1857 ieee80211_mgd_probe_ap(sdata, false);
1858}
1859
9c6bd790
JB		 1860static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1861{
ad935687 1862 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 1863 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1864 IEEE80211_STA_CONNECTION_POLL);
ad935687 1865
b291ba11 1866 /* let's probe the connection once */
42935eca 1867 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 1868 &sdata->u.mgd.monitor_work);
1869 /* and do all the other regular work too */
42935eca 1870 ieee80211_queue_work(&sdata->local->hw,
46900298 1871 &sdata->u.mgd.work);
ad935687 1872 }
9c6bd790 1873}
f0706e82 1874
5bb644a0
JB		 1875#ifdef CONFIG_PM
1876void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1877{
1878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1879
1880 /*
1881 * we need to use atomic bitops for the running bits
1882 * only because both timers might fire at the same
1883 * time -- the code here is properly synchronised.
1884 */
1885
1886 cancel_work_sync(&ifmgd->work);
1e4dcd01 1887 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 1888 if (del_timer_sync(&ifmgd->timer))
1889 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1890
1891 cancel_work_sync(&ifmgd->chswitch_work);
1892 if (del_timer_sync(&ifmgd->chswitch_timer))
1893 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 1894
1895 cancel_work_sync(&ifmgd->monitor_work);
1896 /* these will just be re-established on connection */
1897 del_timer_sync(&ifmgd->conn_mon_timer);
1898 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 1899}
1900
1901void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1902{
1903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1904
1905 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1906 add_timer(&ifmgd->timer);
1907 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1908 add_timer(&ifmgd->chswitch_timer);
1909}
1910#endif
1911
9c6bd790
JB		 1912/* interface setup */
1913void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1914{
46900298 1915 struct ieee80211_if_managed *ifmgd;
988c0f72 1916
46900298
JB		 1917 ifmgd = &sdata->u.mgd;
1918 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 1919 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 1920 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 1921 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1922 ieee80211_beacon_connection_loss_work);
46900298 1923 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 1924 (unsigned long) sdata);
b291ba11
JB		 1925 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1926 (unsigned long) sdata);
1927 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1928 (unsigned long) sdata);
46900298 1929 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 1930 (unsigned long) sdata);
46900298 1931 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 1932
ab1faead 1933 ifmgd->flags = 0;
bbbdff9e 1934
77fdaa12 1935 mutex_init(&ifmgd->mtx);
0f78231b
JB		 1936
1937 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1938 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1939 else
1940 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 1941}
1942
77fdaa12
JB		 1943/* scan finished notification */
1944void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 1945{
77fdaa12 1946 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 1947
77fdaa12
JB		 1948 /* Restart STA timers */
1949 rcu_read_lock();
1950 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1951 ieee80211_restart_sta_timer(sdata);
1952 rcu_read_unlock();
1953}
60f8b39c 1954
77fdaa12
JB		 1955int ieee80211_max_network_latency(struct notifier_block *nb,
1956 unsigned long data, void *dummy)
1957{
1958 s32 latency_usec = (s32) data;
1959 struct ieee80211_local *local =
1960 container_of(nb, struct ieee80211_local,
1961 network_latency_notifier);
1fa6f4af 1962
77fdaa12
JB		 1963 mutex_lock(&local->iflist_mtx);
1964 ieee80211_recalc_ps(local, latency_usec);
1965 mutex_unlock(&local->iflist_mtx);
dfe67012 1966
77fdaa12 1967 return 0;
9c6bd790
JB		 1968}
1969
77fdaa12 1970/* config hooks */
af6b6374
JB		 1971static enum work_done_result
1972ieee80211_probe_auth_done(struct ieee80211_work *wk,
1973 struct sk_buff *skb)
1974{
1975 if (!skb) {
1976 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1977 return WORK_DONE_DESTROY;
1978 }
1979
1980 if (wk->type == IEEE80211_WORK_AUTH) {
1981 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1982 return WORK_DONE_DESTROY;
1983 }
1984
1985 mutex_lock(&wk->sdata->u.mgd.mtx);
1986 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1987 mutex_unlock(&wk->sdata->u.mgd.mtx);
1988
1989 wk->type = IEEE80211_WORK_AUTH;
1990 wk->probe_auth.tries = 0;
1991 return WORK_DONE_REQUEUE;
1992}
1993
77fdaa12
JB		 1994int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1995 struct cfg80211_auth_request *req)
9c6bd790 1996{
77fdaa12 1997 const u8 *ssid;
f679f65d 1998 struct ieee80211_work *wk;
77fdaa12 1999 u16 auth_alg;
9c6bd790 2000
d5cdfacb
JM		 2001 if (req->local_state_change)
2002 return 0; /* no need to update mac80211 state */
2003
77fdaa12
JB		 2004 switch (req->auth_type) {
2005 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2006 auth_alg = WLAN_AUTH_OPEN;
2007 break;
2008 case NL80211_AUTHTYPE_SHARED_KEY:
2009 auth_alg = WLAN_AUTH_SHARED_KEY;
2010 break;
2011 case NL80211_AUTHTYPE_FT:
2012 auth_alg = WLAN_AUTH_FT;
2013 break;
2014 case NL80211_AUTHTYPE_NETWORK_EAP:
2015 auth_alg = WLAN_AUTH_LEAP;
2016 break;
2017 default:
2018 return -EOPNOTSUPP;
60f8b39c 2019 }
77fdaa12
JB		 2020
2021 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2022 if (!wk)
9c6bd790 2023 return -ENOMEM;
77fdaa12 2024
5e124bd5 2025 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2026
2027 if (req->ie && req->ie_len) {
2028 memcpy(wk->ie, req->ie, req->ie_len);
2029 wk->ie_len = req->ie_len;
9c6bd790 2030 }
77fdaa12 2031
fffd0934 2032 if (req->key && req->key_len) {
af6b6374
JB		 2033 wk->probe_auth.key_len = req->key_len;
2034 wk->probe_auth.key_idx = req->key_idx;
2035 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2036 }
2037
77fdaa12 2038 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2039 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2040 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2041
af6b6374
JB		 2042 wk->probe_auth.algorithm = auth_alg;
2043 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2044
070bb547
JB		 2045 /* if we already have a probe, don't probe again */
2046 if (req->bss->proberesp_ies)
2047 wk->type = IEEE80211_WORK_AUTH;
2048 else
2049 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2050 wk->chan = req->bss->channel;
af6b6374
JB		 2051 wk->sdata = sdata;
2052 wk->done = ieee80211_probe_auth_done;
77fdaa12 2053
af6b6374 2054 ieee80211_add_work(wk);
9c6bd790 2055 return 0;
60f8b39c
JB		 2056}
2057
af6b6374
JB		 2058static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2059 struct sk_buff *skb)
2060{
2061 struct ieee80211_mgmt *mgmt;
2062 u16 status;
2063
2064 if (!skb) {
2065 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2066 return WORK_DONE_DESTROY;
2067 }
2068
2069 mgmt = (void *)skb->data;
2070 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2071
2072 if (status == WLAN_STATUS_SUCCESS) {
2073 mutex_lock(&wk->sdata->u.mgd.mtx);
2074 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2075 mutex_unlock(&wk->sdata->u.mgd.mtx);
2076 /* oops -- internal error -- send timeout for now */
2077 cfg80211_send_assoc_timeout(wk->sdata->dev,
2078 wk->filter_ta);
2079 return WORK_DONE_DESTROY;
2080 }
2081 mutex_unlock(&wk->sdata->u.mgd.mtx);
2082 }
2083
2084 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2085 return WORK_DONE_DESTROY;
2086}
2087
77fdaa12
JB		 2088int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2089 struct cfg80211_assoc_request *req)
f0706e82 2090{
77fdaa12 2091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2092 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2093 struct ieee80211_work *wk;
63f170e0 2094 const u8 *ssid;
af6b6374 2095 int i;
f0706e82 2096
77fdaa12 2097 mutex_lock(&ifmgd->mtx);
af6b6374 2098 if (ifmgd->associated) {
9c87ba67
JM		 2099 if (!req->prev_bssid ||
2100 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2101 ETH_ALEN)) {
2102 /*
2103 * We are already associated and the request was not a
2104 * reassociation request from the current BSS, so
2105 * reject it.
2106 */
2107 mutex_unlock(&ifmgd->mtx);
2108 return -EALREADY;
2109 }
2110
2111 /* Trying to reassociate - clear previous association state */
e69e95db 2112 ieee80211_set_disassoc(sdata, true);
af6b6374
JB		 2113 }
2114 mutex_unlock(&ifmgd->mtx);
77fdaa12 2115
63f170e0 2116 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2117 if (!wk)
2118 return -ENOMEM;
77fdaa12 2119
77fdaa12 2120 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2121 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12
JB		 2122
2123 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2124 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2125 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2126 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2127 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2128
77fdaa12
JB		 2129
2130 if (req->ie && req->ie_len) {
2131 memcpy(wk->ie, req->ie, req->ie_len);
2132 wk->ie_len = req->ie_len;
2133 } else
2134 wk->ie_len = 0;
2135
0c1ad2ca 2136 wk->assoc.bss = req->bss;
f679f65d 2137
af6b6374 2138 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2139
af6b6374
JB		 2140 /* new association always uses requested smps mode */
2141 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2142 if (ifmgd->powersave)
2143 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2144 else
2145 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2146 } else
2147 ifmgd->ap_smps = ifmgd->req_smps;
2148
2149 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2150 /*
2151 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2152 * We still associate in non-HT mode (11a/b/g) if any one of these
2153 * ciphers is configured as pairwise.
2154 * We can set this to true for non-11n hardware, that'll be checked
2155 * separately along with the peer capabilities.
2156 */
af6b6374 2157 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2158 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2159 wk->assoc.wmm_used = bss->wmm_used;
2160 wk->assoc.supp_rates = bss->supp_rates;
2161 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2162 wk->assoc.ht_information_ie =
2163 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2164
ab13315a
KV		 2165 if (bss->wmm_used && bss->uapsd_supported &&
2166 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2167 wk->assoc.uapsd_used = true;
2168 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2169 } else {
2170 wk->assoc.uapsd_used = false;
2171 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2172 }
2173
63f170e0 2174 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2175 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2176 wk->assoc.ssid_len = ssid[1];
63f170e0 2177
77fdaa12 2178 if (req->prev_bssid)
f679f65d 2179 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2180
f679f65d 2181 wk->type = IEEE80211_WORK_ASSOC;
f679f65d 2182 wk->chan = req->bss->channel;
af6b6374
JB		 2183 wk->sdata = sdata;
2184 wk->done = ieee80211_assoc_done;
77fdaa12
JB		 2185
2186 if (req->use_mfp) {
2187 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2188 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2189 } else {
2190 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2191 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2192 }
2193
2194 if (req->crypto.control_port)
2195 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2196 else
2197 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2198
af6b6374
JB		 2199 ieee80211_add_work(wk);
2200 return 0;
f0706e82
JB		 2201}
2202
77fdaa12 2203int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2204 struct cfg80211_deauth_request *req,
2205 void *cookie)
f0706e82 2206{
af6b6374 2207 struct ieee80211_local *local = sdata->local;
46900298 2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2209 struct ieee80211_work *wk;
63f170e0 2210 const u8 *bssid = req->bss->bssid;
f0706e82 2211
77fdaa12
JB		 2212 mutex_lock(&ifmgd->mtx);
2213
0c1ad2ca 2214 if (ifmgd->associated == req->bss) {
77fdaa12 2215 bssid = req->bss->bssid;
e69e95db 2216 ieee80211_set_disassoc(sdata, true);
af6b6374
JB		 2217 mutex_unlock(&ifmgd->mtx);
2218 } else {
2219 bool not_auth_yet = false;
f0706e82 2220
a58ce43f 2221 mutex_unlock(&ifmgd->mtx);
a58ce43f 2222
af6b6374
JB		 2223 mutex_lock(&local->work_mtx);
2224 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2225 if (wk->sdata != sdata)
af6b6374 2226 continue;
29165e4c
JB		 2227
2228 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86
RC		 2229 wk->type != IEEE80211_WORK_AUTH &&
2230 wk->type != IEEE80211_WORK_ASSOC)
29165e4c
JB		 2231 continue;
2232
af6b6374
JB		 2233 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2234 continue;
29165e4c
JB		 2235
2236 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2237 list_del_rcu(&wk->list);
af6b6374
JB		 2238 free_work(wk);
2239 break;
2240 }
2241 mutex_unlock(&local->work_mtx);
2242
2243 /*
2244 * If somebody requests authentication and we haven't
2245 * sent out an auth frame yet there's no need to send
2246 * out a deauth frame either. If the state was PROBE,
2247 * then this is the case. If it's AUTH we have sent a
2248 * frame, and if it's IDLE we have completed the auth
2249 * process already.
2250 */
2251 if (not_auth_yet) {
2252 __cfg80211_auth_canceled(sdata->dev, bssid);
2253 return 0;
2254 }
2255 }
77fdaa12 2256
0ff71613 2257 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2258 sdata->name, bssid, req->reason_code);
0ff71613 2259
d5cdfacb
JM		 2260 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2261 req->reason_code, cookie,
2262 !req->local_state_change);
f0706e82 2263
bc83b681
JB		 2264 ieee80211_recalc_idle(sdata->local);
2265
f0706e82
JB		 2266 return 0;
2267}
84363e6e 2268
77fdaa12 2269int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2270 struct cfg80211_disassoc_request *req,
2271 void *cookie)
9c6bd790 2272{
77fdaa12 2273 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2274 u8 bssid[ETH_ALEN];
9c6bd790 2275
77fdaa12 2276 mutex_lock(&ifmgd->mtx);
10f644a4 2277
8d8b261a
JB		 2278 /*
2279 * cfg80211 should catch this ... but it's racy since
2280 * we can receive a disassoc frame, process it, hand it
2281 * to cfg80211 while that's in a locked section already
2282 * trying to tell us that the user wants to disconnect.
2283 */
0c1ad2ca 2284 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2285 mutex_unlock(&ifmgd->mtx);
2286 return -ENOLINK;
2287 }
2288
0ff71613 2289 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2290 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2291
e69e95db
JM		 2292 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2293 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2294
2295 mutex_unlock(&ifmgd->mtx);
10f644a4 2296
77fdaa12 2297 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2298 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2299 cookie, !req->local_state_change);
e69e95db 2300 sta_info_destroy_addr(sdata, bssid);
bc83b681
JB		 2301
2302 ieee80211_recalc_idle(sdata->local);
2303
10f644a4
JB		 2304 return 0;
2305}
026331c4
JM		 2306
2307int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2308 struct ieee80211_channel *chan,
2309 enum nl80211_channel_type channel_type,
2310 const u8 *buf, size_t len, u64 *cookie)
2311{
2312 struct ieee80211_local *local = sdata->local;
2313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2314 struct sk_buff *skb;
2315
2316 /* Check that we are on the requested channel for transmission */
2317 if ((chan != local->tmp_channel ||
2318 channel_type != local->tmp_channel_type) &&
2319 (chan != local->oper_channel ||
0aaffa9b 2320 channel_type != local->_oper_channel_type))
026331c4
JM		 2321 return -EBUSY;
2322
2323 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2324 if (!skb)
2325 return -ENOMEM;
2326 skb_reserve(skb, local->hw.extra_tx_headroom);
2327
2328 memcpy(skb_put(skb, len), buf, len);
2329
2330 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2331 IEEE80211_SKB_CB(skb)->flags |=
2332 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2333 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2334 IEEE80211_TX_CTL_REQ_TX_STATUS;
2335 skb->dev = sdata->dev;
2336 ieee80211_tx_skb(sdata, skb);
2337
2338 *cookie = (unsigned long) skb;
2339 return 0;
2340}
a97c13c3
JO		 2341
2342void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2343 enum nl80211_cqm_rssi_threshold_event rssi_event,
2344 gfp_t gfp)
2345{
2346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2347
b5878a2d
JB		 2348 trace_api_cqm_rssi_notify(sdata, rssi_event);
2349
a97c13c3
JO		 2350 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2351}
2352EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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