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cfg80211/mac80211: add netdev param to set_txq_params()
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
d5522e03
JB		 165{
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
d5522e03
JB		 168 struct sta_info *sta;
169 u32 changed = 0;
172710bf 170 int hti_cfreq;
9ed6bcce 171 u16 ht_opmode;
0aaffa9b
JB		 172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
175
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
177
0aaffa9b
JB		 178 prev_chantype = sdata->vif.bss_conf.channel_type;
179
d5522e03
JB		 180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
182 enable_ht = false;
183
172710bf
BG		 184 if (enable_ht) {
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
186 sband->band);
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
192 */
193 printk(KERN_DEBUG
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
198 sdata->name,
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
201 sband->band);
202 enable_ht = false;
203 }
204 }
d5522e03
JB		 205
206 if (enable_ht) {
207 channel_type = NL80211_CHAN_HT20;
208
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
211 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
212 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 214 if (!(local->hw.conf.channel->flags &
215 IEEE80211_CHAN_NO_HT40PLUS))
216 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 217 break;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40MINUS))
221 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 222 break;
223 }
224 }
225 }
226
fe6f212c
RC		 227 if (local->tmp_channel)
228 local->tmp_channel_type = channel_type;
d5522e03 229
0aaffa9b
JB		 230 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type = NL80211_CHAN_HT20;
233 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
234 }
d5522e03 235
7cc44ed4
RM		 236 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
237 /*
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
241 */
242 ieee80211_stop_queues_by_reason(&sdata->local->hw,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
244
245 /* flush out all packets */
246 synchronize_net();
247
248 drv_flush(local, false);
249 }
250
0aaffa9b
JB		 251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local, 0);
d5522e03 253
0aaffa9b 254 if (prev_chantype != channel_type) {
d5522e03 255 rcu_read_lock();
abe60632 256 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 257 if (sta)
258 rate_control_rate_update(local, sband, sta,
4fa00437 259 IEEE80211_RC_HT_CHANGED,
0aaffa9b 260 channel_type);
d5522e03 261 rcu_read_unlock();
7cc44ed4
RM		 262
263 if (beacon_htcap_ie)
264 ieee80211_wake_queues_by_reason(&sdata->local->hw,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 266 }
d5522e03 267
9ed6bcce 268 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 269
270 /* if bss configuration changed store the new one */
0aaffa9b
JB		 271 if (sdata->ht_opmode_valid != enable_ht ||
272 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
273 prev_chantype != channel_type) {
d5522e03 274 changed |= BSS_CHANGED_HT;
9ed6bcce 275 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 276 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 277 }
278
279 return changed;
280}
281
9c6bd790
JB		 282/* frame sending functions */
283
ef422bc0 284static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 285 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 286 void *cookie, bool send_frame)
9ac19a90
JB		 287{
288 struct ieee80211_local *local = sdata->local;
46900298 289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 290 struct sk_buff *skb;
291 struct ieee80211_mgmt *mgmt;
9aed3cc1 292
65fc73ac 293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 294 if (!skb)
9ac19a90 295 return;
d15b8459 296
9ac19a90
JB		 297 skb_reserve(skb, local->hw.extra_tx_headroom);
298
299 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
300 memset(mgmt, 0, 24);
77fdaa12 301 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 305 skb_put(skb, 2);
ef422bc0 306 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 307 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
308
53b46b84 309 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 310 if (cookie)
311 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
312 else
313 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 314 else
ce470613
HS		 315 if (cookie)
316 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
317 else
318 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 319 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 321
322 if (send_frame)
323 ieee80211_tx_skb(sdata, skb);
324 else
325 kfree_skb(skb);
9ac19a90
JB		 326}
327
572e0012
KV		 328void ieee80211_send_pspoll(struct ieee80211_local *local,
329 struct ieee80211_sub_if_data *sdata)
330{
572e0012
KV		 331 struct ieee80211_pspoll *pspoll;
332 struct sk_buff *skb;
572e0012 333
d8cd189e
KV		 334 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
335 if (!skb)
572e0012 336 return;
572e0012 337
d8cd189e
KV		 338 pspoll = (struct ieee80211_pspoll *) skb->data;
339 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 340
62ae67be
JB		 341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 343}
344
965bedad
JB		 345void ieee80211_send_nullfunc(struct ieee80211_local *local,
346 struct ieee80211_sub_if_data *sdata,
347 int powersave)
348{
349 struct sk_buff *skb;
d8cd189e 350 struct ieee80211_hdr_3addr *nullfunc;
965bedad 351
d8cd189e
KV		 352 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
353 if (!skb)
965bedad 354 return;
965bedad 355
d8cd189e 356 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 357 if (powersave)
d8cd189e 358 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 359
62ae67be
JB		 360 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
361 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 362}
363
d524215f
FF		 364static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
365 struct ieee80211_sub_if_data *sdata)
366{
367 struct sk_buff *skb;
368 struct ieee80211_hdr *nullfunc;
369 __le16 fc;
370
371 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
372 return;
373
374 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 375 if (!skb)
d524215f 376 return;
d15b8459 377
d524215f
FF		 378 skb_reserve(skb, local->hw.extra_tx_headroom);
379
380 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
381 memset(nullfunc, 0, 30);
382 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
383 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
384 nullfunc->frame_control = fc;
385 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
386 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
387 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
388 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
389
390 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
391 ieee80211_tx_skb(sdata, skb);
392}
393
cc32abd4
JB		 394/* spectrum management related things */
395static void ieee80211_chswitch_work(struct work_struct *work)
396{
397 struct ieee80211_sub_if_data *sdata =
398 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
400
9607e6b6 401 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 402 return;
403
77fdaa12
JB		 404 mutex_lock(&ifmgd->mtx);
405 if (!ifmgd->associated)
406 goto out;
cc32abd4
JB		 407
408 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 409 if (!sdata->local->ops->channel_switch) {
410 /* call "hw_config" only if doing sw channel switch */
411 ieee80211_hw_config(sdata->local,
412 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 413 } else {
414 /* update the device channel directly */
415 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 416 }
77fdaa12 417
cc32abd4 418 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 419 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 420
cc32abd4
JB		 421 ieee80211_wake_queues_by_reason(&sdata->local->hw,
422 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 423 out:
424 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
425 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 426}
427
5ce6e438
JB		 428void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
429{
430 struct ieee80211_sub_if_data *sdata;
431 struct ieee80211_if_managed *ifmgd;
432
433 sdata = vif_to_sdata(vif);
434 ifmgd = &sdata->u.mgd;
435
436 trace_api_chswitch_done(sdata, success);
437 if (!success) {
438 /*
439 * If the channel switch was not successful, stay
440 * around on the old channel. We currently lack
441 * good handling of this situation, possibly we
442 * should just drop the association.
443 */
444 sdata->local->csa_channel = sdata->local->oper_channel;
445 }
446
447 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
448}
449EXPORT_SYMBOL(ieee80211_chswitch_done);
450
cc32abd4
JB		 451static void ieee80211_chswitch_timer(unsigned long data)
452{
453 struct ieee80211_sub_if_data *sdata =
454 (struct ieee80211_sub_if_data *) data;
455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
456
5bb644a0
JB		 457 if (sdata->local->quiescing) {
458 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
459 return;
460 }
461
42935eca 462 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 463}
464
465void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
466 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 467 struct ieee80211_bss *bss,
468 u64 timestamp)
cc32abd4 469{
0c1ad2ca
JB		 470 struct cfg80211_bss *cbss =
471 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 472 struct ieee80211_channel *new_ch;
473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 474 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
475 cbss->channel->band);
cc32abd4 476
77fdaa12
JB		 477 ASSERT_MGD_MTX(ifmgd);
478
479 if (!ifmgd->associated)
cc32abd4
JB		 480 return;
481
fbe9c429 482 if (sdata->local->scanning)
cc32abd4
JB		 483 return;
484
485 /* Disregard subsequent beacons if we are already running a timer
486 processing a CSA */
487
488 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
489 return;
490
491 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
492 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
493 return;
494
495 sdata->local->csa_channel = new_ch;
496
5ce6e438
JB		 497 if (sdata->local->ops->channel_switch) {
498 /* use driver's channel switch callback */
499 struct ieee80211_channel_switch ch_switch;
500 memset(&ch_switch, 0, sizeof(ch_switch));
501 ch_switch.timestamp = timestamp;
502 if (sw_elem->mode) {
503 ch_switch.block_tx = true;
504 ieee80211_stop_queues_by_reason(&sdata->local->hw,
505 IEEE80211_QUEUE_STOP_REASON_CSA);
506 }
507 ch_switch.channel = new_ch;
508 ch_switch.count = sw_elem->count;
509 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
510 drv_channel_switch(sdata->local, &ch_switch);
511 return;
512 }
513
514 /* channel switch handled in software */
cc32abd4 515 if (sw_elem->count <= 1) {
42935eca 516 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 517 } else {
9feaddc7
WYG		 518 if (sw_elem->mode)
519 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 520 IEEE80211_QUEUE_STOP_REASON_CSA);
521 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
522 mod_timer(&ifmgd->chswitch_timer,
523 jiffies +
524 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 525 cbss->beacon_interval));
cc32abd4
JB		 526 }
527}
528
529static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
530 u16 capab_info, u8 *pwr_constr_elem,
531 u8 pwr_constr_elem_len)
532{
533 struct ieee80211_conf *conf = &sdata->local->hw.conf;
534
535 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
536 return;
537
538 /* Power constraint IE length should be 1 octet */
539 if (pwr_constr_elem_len != 1)
540 return;
541
542 if ((*pwr_constr_elem <= conf->channel->max_power) &&
543 (*pwr_constr_elem != sdata->local->power_constr_level)) {
544 sdata->local->power_constr_level = *pwr_constr_elem;
545 ieee80211_hw_config(sdata->local, 0);
546 }
547}
548
f90754c1
JO		 549void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
550{
551 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
552 struct ieee80211_local *local = sdata->local;
553 struct ieee80211_conf *conf = &local->hw.conf;
554
555 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
556 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
557 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
558
559 local->disable_dynamic_ps = false;
560 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
561}
562EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
563
564void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
565{
566 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
567 struct ieee80211_local *local = sdata->local;
568 struct ieee80211_conf *conf = &local->hw.conf;
569
570 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
571 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
572 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
573
574 local->disable_dynamic_ps = true;
575 conf->dynamic_ps_timeout = 0;
576 del_timer_sync(&local->dynamic_ps_timer);
577 ieee80211_queue_work(&local->hw,
578 &local->dynamic_ps_enable_work);
579}
580EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
581
965bedad
JB		 582/* powersave */
583static void ieee80211_enable_ps(struct ieee80211_local *local,
584 struct ieee80211_sub_if_data *sdata)
585{
586 struct ieee80211_conf *conf = &local->hw.conf;
587
d5edaedc
JB		 588 /*
589 * If we are scanning right now then the parameters will
590 * take effect when scan finishes.
591 */
fbe9c429 592 if (local->scanning)
d5edaedc
JB		 593 return;
594
965bedad
JB		 595 if (conf->dynamic_ps_timeout > 0 &&
596 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
597 mod_timer(&local->dynamic_ps_timer, jiffies +
598 msecs_to_jiffies(conf->dynamic_ps_timeout));
599 } else {
600 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
601 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 602
2a13052f
JO		 603 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
604 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
605 return;
606
607 conf->flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 609 }
610}
611
612static void ieee80211_change_ps(struct ieee80211_local *local)
613{
614 struct ieee80211_conf *conf = &local->hw.conf;
615
616 if (local->ps_sdata) {
965bedad
JB		 617 ieee80211_enable_ps(local, local->ps_sdata);
618 } else if (conf->flags & IEEE80211_CONF_PS) {
619 conf->flags &= ~IEEE80211_CONF_PS;
620 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
621 del_timer_sync(&local->dynamic_ps_timer);
622 cancel_work_sync(&local->dynamic_ps_enable_work);
623 }
624}
625
808118cb
JY		 626static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
627{
628 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
629 struct sta_info *sta = NULL;
630 u32 sta_flags = 0;
631
632 if (!mgd->powersave)
633 return false;
634
635 if (!mgd->associated)
636 return false;
637
638 if (!mgd->associated->beacon_ies)
639 return false;
640
641 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
642 IEEE80211_STA_CONNECTION_POLL))
643 return false;
644
645 rcu_read_lock();
646 sta = sta_info_get(sdata, mgd->bssid);
647 if (sta)
648 sta_flags = get_sta_flags(sta);
649 rcu_read_unlock();
650
651 if (!(sta_flags & WLAN_STA_AUTHORIZED))
652 return false;
653
654 return true;
655}
656
965bedad 657/* need to hold RTNL or interface lock */
10f644a4 658void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 659{
660 struct ieee80211_sub_if_data *sdata, *found = NULL;
661 int count = 0;
195e294d 662 int timeout;
965bedad
JB		 663
664 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
665 local->ps_sdata = NULL;
666 return;
667 }
668
af6b6374
JB		 669 if (!list_empty(&local->work_list)) {
670 local->ps_sdata = NULL;
671 goto change;
672 }
673
965bedad 674 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 675 if (!ieee80211_sdata_running(sdata))
965bedad 676 continue;
8c7914de
RM		 677 if (sdata->vif.type == NL80211_IFTYPE_AP) {
678 /* If an AP vif is found, then disable PS
679 * by setting the count to zero thereby setting
680 * ps_sdata to NULL.
681 */
682 count = 0;
683 break;
684 }
965bedad
JB		 685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
686 continue;
687 found = sdata;
688 count++;
689 }
690
808118cb 691 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 692 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 693 s32 beaconint_us;
694
695 if (latency < 0)
ed77134b 696 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 697
698 beaconint_us = ieee80211_tu_to_usec(
699 found->vif.bss_conf.beacon_int);
700
ff616381 701 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 702 if (timeout < 0) {
703 /*
ff616381
JO		 704 * Go to full PSM if the user configures a very low
705 * latency requirement.
0ab82b04
EP		 706 * The 2000 second value is there for compatibility
707 * until the PM_QOS_NETWORK_LATENCY is configured
708 * with real values.
195e294d 709 */
0ab82b04
EP		 710 if (latency > (1900 * USEC_PER_MSEC) &&
711 latency != (2000 * USEC_PER_SEC))
195e294d 712 timeout = 0;
ff616381
JO		 713 else
714 timeout = 100;
195e294d 715 }
f90754c1
JO		 716 local->dynamic_ps_user_timeout = timeout;
717 if (!local->disable_dynamic_ps)
718 conf->dynamic_ps_timeout =
719 local->dynamic_ps_user_timeout;
195e294d 720
04fe2037 721 if (beaconint_us > latency) {
10f644a4 722 local->ps_sdata = NULL;
04fe2037 723 } else {
56007a02 724 struct ieee80211_bss *bss;
04fe2037 725 int maxslp = 1;
56007a02 726 u8 dtimper;
04fe2037 727
56007a02
JB		 728 bss = (void *)found->u.mgd.associated->priv;
729 dtimper = bss->dtim_period;
730
731 /* If the TIM IE is invalid, pretend the value is 1 */
732 if (!dtimper)
733 dtimper = 1;
734 else if (dtimper > 1)
04fe2037
JB		 735 maxslp = min_t(int, dtimper,
736 latency / beaconint_us);
737
9ccebe61 738 local->hw.conf.max_sleep_period = maxslp;
56007a02 739 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 740 local->ps_sdata = found;
04fe2037 741 }
10f644a4 742 } else {
965bedad 743 local->ps_sdata = NULL;
10f644a4 744 }
965bedad 745
af6b6374 746 change:
965bedad
JB		 747 ieee80211_change_ps(local);
748}
749
750void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
751{
752 struct ieee80211_local *local =
753 container_of(work, struct ieee80211_local,
754 dynamic_ps_disable_work);
755
756 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
757 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
758 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
759 }
760
761 ieee80211_wake_queues_by_reason(&local->hw,
762 IEEE80211_QUEUE_STOP_REASON_PS);
763}
764
765void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
766{
767 struct ieee80211_local *local =
768 container_of(work, struct ieee80211_local,
769 dynamic_ps_enable_work);
770 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 771 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 772 unsigned long flags;
773 int q;
965bedad
JB		 774
775 /* can only happen when PS was just disabled anyway */
776 if (!sdata)
777 return;
778
5e34069c
CL		 779 ifmgd = &sdata->u.mgd;
780
965bedad
JB		 781 if (local->hw.conf.flags & IEEE80211_CONF_PS)
782 return;
783
77b7023a
AN		 784 if (!local->disable_dynamic_ps &&
785 local->hw.conf.dynamic_ps_timeout > 0) {
786 /* don't enter PS if TX frames are pending */
787 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 788 mod_timer(&local->dynamic_ps_timer, jiffies +
789 msecs_to_jiffies(
790 local->hw.conf.dynamic_ps_timeout));
791 return;
792 }
77b7023a
AN		 793
794 /*
795 * transmission can be stopped by others which leads to
796 * dynamic_ps_timer expiry. Postpone the ps timer if it
797 * is not the actual idle state.
798 */
799 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
800 for (q = 0; q < local->hw.queues; q++) {
801 if (local->queue_stop_reasons[q]) {
802 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
803 flags);
804 mod_timer(&local->dynamic_ps_timer, jiffies +
805 msecs_to_jiffies(
806 local->hw.conf.dynamic_ps_timeout));
807 return;
808 }
809 }
810 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 811 }
1ddc2867 812
375177bf 813 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 814 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
815 netif_tx_stop_all_queues(sdata->dev);
965bedad 816
e8306f98
VN		 817 if (drv_tx_frames_pending(local))
818 mod_timer(&local->dynamic_ps_timer, jiffies +
819 msecs_to_jiffies(
820 local->hw.conf.dynamic_ps_timeout));
821 else {
822 ieee80211_send_nullfunc(local, sdata, 1);
823 /* Flush to get the tx status of nullfunc frame */
824 drv_flush(local, false);
825 }
f3e85b9e
VN		 826 }
827
2a13052f
JO		 828 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
829 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 830 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
831 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
832 local->hw.conf.flags |= IEEE80211_CONF_PS;
833 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
834 }
f3e85b9e 835
77b7023a
AN		 836 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
837 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 838}
839
840void ieee80211_dynamic_ps_timer(unsigned long data)
841{
842 struct ieee80211_local *local = (void *) data;
843
78f1a8b7 844 if (local->quiescing || local->suspended)
5bb644a0
JB		 845 return;
846
42935eca 847 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 848}
849
60f8b39c 850/* MLME */
f698d856 851static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 852 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 853 u8 *wmm_param, size_t wmm_param_len)
854{
f0706e82 855 struct ieee80211_tx_queue_params params;
4ced3f74 856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 857 size_t left;
858 int count;
ab13315a 859 u8 *pos, uapsd_queues = 0;
f0706e82 860
e1b3ec1a
SG		 861 if (!local->ops->conf_tx)
862 return;
863
af6b6374 864 if (local->hw.queues < 4)
3434fbd3
JB		 865 return;
866
867 if (!wmm_param)
868 return;
869
f0706e82
JB		 870 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
871 return;
ab13315a
KV		 872
873 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 874 uapsd_queues = local->uapsd_queues;
ab13315a 875
f0706e82 876 count = wmm_param[6] & 0x0f;
46900298 877 if (count == ifmgd->wmm_last_param_set)
f0706e82 878 return;
46900298 879 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 880
881 pos = wmm_param + 8;
882 left = wmm_param_len - 8;
883
884 memset(&params, 0, sizeof(params));
885
f0706e82
JB		 886 local->wmm_acm = 0;
887 for (; left >= 4; left -= 4, pos += 4) {
888 int aci = (pos[0] >> 5) & 0x03;
889 int acm = (pos[0] >> 4) & 0x01;
ab13315a 890 bool uapsd = false;
f0706e82
JB		 891 int queue;
892
893 switch (aci) {
0eeb59fe 894 case 1: /* AC_BK */
e100bb64 895 queue = 3;
988c0f72 896 if (acm)
0eeb59fe 897 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 898 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
899 uapsd = true;
f0706e82 900 break;
0eeb59fe 901 case 2: /* AC_VI */
e100bb64 902 queue = 1;
988c0f72 903 if (acm)
0eeb59fe 904 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 905 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
906 uapsd = true;
f0706e82 907 break;
0eeb59fe 908 case 3: /* AC_VO */
e100bb64 909 queue = 0;
988c0f72 910 if (acm)
0eeb59fe 911 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
913 uapsd = true;
f0706e82 914 break;
0eeb59fe 915 case 0: /* AC_BE */
f0706e82 916 default:
e100bb64 917 queue = 2;
988c0f72 918 if (acm)
0eeb59fe 919 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
921 uapsd = true;
f0706e82
JB		 922 break;
923 }
924
925 params.aifs = pos[0] & 0x0f;
926 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
927 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 928 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 929 params.uapsd = uapsd;
930
f4ea83dd 931#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 932 wiphy_debug(local->hw.wiphy,
933 "WMM queue=%d aci=%d acm=%d aifs=%d "
934 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
935 queue, aci, acm,
936 params.aifs, params.cw_min, params.cw_max,
937 params.txop, params.uapsd);
3330d7be 938#endif
2683d65b 939 local->tx_conf[queue] = params;
e1b3ec1a 940 if (drv_conf_tx(local, queue, &params))
0fb9a9ec
JP		 941 wiphy_debug(local->hw.wiphy,
942 "failed to set TX queue parameters for queue %d\n",
943 queue);
f0706e82 944 }
e1b3ec1a
SG		 945
946 /* enable WMM or activate new settings */
4ced3f74
JB		 947 sdata->vif.bss_conf.qos = true;
948 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 949}
950
7a5158ef
JB		 951static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
952 u16 capab, bool erp_valid, u8 erp)
5628221c 953{
bda3933a 954 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 955 u32 changed = 0;
7a5158ef
JB		 956 bool use_protection;
957 bool use_short_preamble;
958 bool use_short_slot;
959
960 if (erp_valid) {
961 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
962 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
963 } else {
964 use_protection = false;
965 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
966 }
967
968 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 969 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
970 use_short_slot = true;
5628221c 971
471b3efd 972 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 973 bss_conf->use_cts_prot = use_protection;
974 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 975 }
7e9ed188 976
d43c7b37 977 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 978 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 979 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 980 }
d9430a32 981
7a5158ef 982 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 983 bss_conf->use_short_slot = use_short_slot;
984 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 985 }
986
987 return changed;
988}
989
f698d856 990static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 991 struct cfg80211_bss *cbss,
ae5eb026 992 u32 bss_info_changed)
f0706e82 993{
0c1ad2ca 994 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 995 struct ieee80211_local *local = sdata->local;
68542962 996 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 997
ae5eb026 998 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 999 /* set timing information */
68542962
JO		 1000 bss_conf->beacon_int = cbss->beacon_interval;
1001 bss_conf->timestamp = cbss->tsf;
5628221c 1002
77fdaa12
JB		 1003 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1004 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1005 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1006
7ccc8bd7
FF		 1007 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1008 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1009
0c1ad2ca
JB		 1010 sdata->u.mgd.associated = cbss;
1011 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1012
17e4ec14
JM		 1013 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1014
b291ba11
JB		 1015 /* just to be sure */
1016 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1017 IEEE80211_STA_BEACON_POLL);
1018
9ac19a90 1019 ieee80211_led_assoc(local, 1);
9306102e 1020
e5b900d2
JB		 1021 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1022 bss_conf->dtim_period = bss->dtim_period;
1023 else
1024 bss_conf->dtim_period = 0;
1025
68542962 1026 bss_conf->assoc = 1;
96dd22ac
JB		 1027 /*
1028 * For now just always ask the driver to update the basic rateset
1029 * when we have associated, we aren't checking whether it actually
1030 * changed or not.
1031 */
ae5eb026 1032 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1033
1034 /* And the BSSID changed - we're associated now */
1035 bss_info_changed |= BSS_CHANGED_BSSID;
1036
a97c13c3
JO		 1037 /* Tell the driver to monitor connection quality (if supported) */
1038 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1039 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1040 bss_info_changed |= BSS_CHANGED_CQM;
1041
68542962
JO		 1042 /* Enable ARP filtering */
1043 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1044 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1045 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1046 }
1047
ae5eb026 1048 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1049
056508dc
JB		 1050 mutex_lock(&local->iflist_mtx);
1051 ieee80211_recalc_ps(local, -1);
025e6be2 1052 ieee80211_recalc_smps(local);
056508dc 1053 mutex_unlock(&local->iflist_mtx);
e0cb686f 1054
8a5b33f5 1055 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1056 netif_carrier_on(sdata->dev);
f0706e82
JB		 1057}
1058
e69e95db 1059static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1060 bool remove_sta, bool tx)
aa458d17 1061{
46900298 1062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1063 struct ieee80211_local *local = sdata->local;
1064 struct sta_info *sta;
e0cb686f 1065 u32 changed = 0, config_changed = 0;
b291ba11 1066 u8 bssid[ETH_ALEN];
aa458d17 1067
77fdaa12
JB		 1068 ASSERT_MGD_MTX(ifmgd);
1069
b291ba11
JB		 1070 if (WARN_ON(!ifmgd->associated))
1071 return;
1072
0c1ad2ca 1073 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1074
77fdaa12
JB		 1075 ifmgd->associated = NULL;
1076 memset(ifmgd->bssid, 0, ETH_ALEN);
1077
1078 /*
1079 * we need to commit the associated = NULL change because the
1080 * scan code uses that to determine whether this iface should
1081 * go to/wake up from powersave or not -- and could otherwise
1082 * wake the queues erroneously.
1083 */
1084 smp_mb();
1085
1086 /*
1087 * Thus, we can only afterwards stop the queues -- to account
1088 * for the case where another CPU is finishing a scan at this
1089 * time -- we don't want the scan code to enable queues.
1090 */
aa458d17 1091
8a5b33f5 1092 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1093 netif_carrier_off(sdata->dev);
1094
2a419056 1095 mutex_lock(&local->sta_mtx);
abe60632 1096 sta = sta_info_get(sdata, bssid);
4cad6c7c 1097 if (sta) {
2a419056 1098 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
53f73c09 1099 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1100 }
2a419056 1101 mutex_unlock(&local->sta_mtx);
aa458d17 1102
f5e5bf25
TW		 1103 changed |= ieee80211_reset_erp_info(sdata);
1104
f5e5bf25 1105 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1106 changed |= BSS_CHANGED_ASSOC;
1107 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1108
aa837e1d
JB		 1109 ieee80211_set_wmm_default(sdata);
1110
4797938c 1111 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1112 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1113
413ad50a
JB		 1114 /* on the next assoc, re-program HT parameters */
1115 sdata->ht_opmode_valid = false;
1116
a8302de9
VT		 1117 local->power_constr_level = 0;
1118
520eb820
KV		 1119 del_timer_sync(&local->dynamic_ps_timer);
1120 cancel_work_sync(&local->dynamic_ps_enable_work);
1121
e0cb686f
KV		 1122 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1123 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1124 config_changed |= IEEE80211_CONF_CHANGE_PS;
1125 }
a331400b 1126 local->ps_sdata = NULL;
ae5eb026 1127
e0cb686f 1128 ieee80211_hw_config(local, config_changed);
9cef8737 1129
68542962
JO		 1130 /* Disable ARP filtering */
1131 if (sdata->vif.bss_conf.arp_filter_enabled) {
1132 sdata->vif.bss_conf.arp_filter_enabled = false;
1133 changed |= BSS_CHANGED_ARP_FILTER;
1134 }
1135
0aaffa9b
JB		 1136 /* The BSSID (not really interesting) and HT changed */
1137 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1138 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1139
e69e95db
JM		 1140 if (remove_sta)
1141 sta_info_destroy_addr(sdata, bssid);
b9dcf712
JB		 1142
1143 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1144 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1145 del_timer_sync(&sdata->u.mgd.timer);
1146 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1147}
f0706e82 1148
3cf335d5
KV		 1149void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1150 struct ieee80211_hdr *hdr)
1151{
1152 /*
1153 * We can postpone the mgd.timer whenever receiving unicast frames
1154 * from AP because we know that the connection is working both ways
1155 * at that time. But multicast frames (and hence also beacons) must
1156 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1157 * data idle periods for sending the periodic probe request to the
1158 * AP we're connected to.
3cf335d5 1159 */
b291ba11
JB		 1160 if (is_multicast_ether_addr(hdr->addr1))
1161 return;
1162
be099e82 1163 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1164}
f0706e82 1165
4e5ff376
FF		 1166static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1167{
1168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1169
1170 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1171 IEEE80211_STA_CONNECTION_POLL)))
1172 return;
1173
1174 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1175 IEEE80211_STA_BEACON_POLL);
1176 mutex_lock(&sdata->local->iflist_mtx);
1177 ieee80211_recalc_ps(sdata->local, -1);
1178 mutex_unlock(&sdata->local->iflist_mtx);
1179
1180 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1181 return;
1182
1183 /*
1184 * We've received a probe response, but are not sure whether
1185 * we have or will be receiving any beacons or data, so let's
1186 * schedule the timers again, just in case.
1187 */
1188 ieee80211_sta_reset_beacon_monitor(sdata);
1189
1190 mod_timer(&ifmgd->conn_mon_timer,
1191 round_jiffies_up(jiffies +
1192 IEEE80211_CONNECTION_IDLE_TIME));
1193}
1194
1195void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1196 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1197{
75706d0e 1198 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1199 return;
1200
04ac3c0e
FF		 1201 if (ack)
1202 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1203
1204 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1205 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1206 if (ack)
1207 sdata->u.mgd.probe_send_count = 0;
1208 else
1209 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1210 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1211 }
1212}
1213
a43abf29
ML		 1214static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1215{
1216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1217 const u8 *ssid;
f01a067d 1218 u8 *dst = ifmgd->associated->bssid;
180205bd 1219 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1220
1221 /*
1222 * Try sending broadcast probe requests for the last three
1223 * probe requests after the first ones failed since some
1224 * buggy APs only support broadcast probe requests.
1225 */
1226 if (ifmgd->probe_send_count >= unicast_limit)
1227 dst = NULL;
a43abf29 1228
4e5ff376
FF		 1229 /*
1230 * When the hardware reports an accurate Tx ACK status, it's
1231 * better to send a nullfunc frame instead of a probe request,
1232 * as it will kick us off the AP quickly if we aren't associated
1233 * anymore. The timeout will be reset if the frame is ACKed by
1234 * the AP.
1235 */
04ac3c0e
FF		 1236 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1237 ifmgd->nullfunc_failed = false;
4e5ff376 1238 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1239 } else {
4e5ff376 1240 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1241 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1242 (u32) -1, true, false);
4e5ff376 1243 }
a43abf29
ML		 1244
1245 ifmgd->probe_send_count++;
180205bd 1246 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1247 run_again(ifmgd, ifmgd->probe_timeout);
1248}
1249
b291ba11
JB		 1250static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1251 bool beacon)
04de8381 1252{
04de8381 1253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1254 bool already = false;
34bfc411 1255
9607e6b6 1256 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1257 return;
1258
91a3bd76
LR		 1259 if (sdata->local->scanning)
1260 return;
1261
b8bc4b0a
JB		 1262 if (sdata->local->tmp_channel)
1263 return;
1264
77fdaa12
JB		 1265 mutex_lock(&ifmgd->mtx);
1266
1267 if (!ifmgd->associated)
1268 goto out;
1269
a860402d 1270#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1271 if (beacon && net_ratelimit())
1272 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1273 "- sending probe request\n", sdata->name);
a860402d 1274#endif
04de8381 1275
b291ba11
JB		 1276 /*
1277 * The driver/our work has already reported this event or the
1278 * connection monitoring has kicked in and we have already sent
1279 * a probe request. Or maybe the AP died and the driver keeps
1280 * reporting until we disassociate...
1281 *
1282 * In either case we have to ignore the current call to this
1283 * function (except for setting the correct probe reason bit)
1284 * because otherwise we would reset the timer every time and
1285 * never check whether we received a probe response!
1286 */
1287 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1288 IEEE80211_STA_CONNECTION_POLL))
1289 already = true;
1290
1291 if (beacon)
1292 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1293 else
1294 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1295
1296 if (already)
1297 goto out;
1298
4e751843
JB		 1299 mutex_lock(&sdata->local->iflist_mtx);
1300 ieee80211_recalc_ps(sdata->local, -1);
1301 mutex_unlock(&sdata->local->iflist_mtx);
1302
a43abf29
ML		 1303 ifmgd->probe_send_count = 0;
1304 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1305 out:
1306 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1307}
1308
a619a4c0
JO		 1309struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1310 struct ieee80211_vif *vif)
1311{
1312 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1314 struct sk_buff *skb;
1315 const u8 *ssid;
1316
1317 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1318 return NULL;
1319
1320 ASSERT_MGD_MTX(ifmgd);
1321
1322 if (!ifmgd->associated)
1323 return NULL;
1324
1325 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1326 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1327 (u32) -1, ssid + 2, ssid[1],
1328 NULL, 0, true);
a619a4c0
JO		 1329
1330 return skb;
1331}
1332EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1333
1e4dcd01
JO		 1334static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1335{
1336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1337 struct ieee80211_local *local = sdata->local;
1338 u8 bssid[ETH_ALEN];
1339
1340 mutex_lock(&ifmgd->mtx);
1341 if (!ifmgd->associated) {
1342 mutex_unlock(&ifmgd->mtx);
1343 return;
1344 }
1345
1346 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1347
180205bd
BG		 1348 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1349 sdata->name, bssid);
1e4dcd01 1350
53f73c09 1351 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1352 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1353
1354 mutex_lock(&local->mtx);
1355 ieee80211_recalc_idle(local);
1356 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1357 /*
1358 * must be outside lock due to cfg80211,
1359 * but that's not a problem.
1360 */
1361 ieee80211_send_deauth_disassoc(sdata, bssid,
1362 IEEE80211_STYPE_DEAUTH,
1363 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1364 NULL, true);
1e4dcd01
JO		 1365}
1366
1367void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1368{
1369 struct ieee80211_sub_if_data *sdata =
1370 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1371 u.mgd.beacon_connection_loss_work);
b291ba11 1372
1e4dcd01
JO		 1373 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1374 __ieee80211_connection_loss(sdata);
1375 else
1376 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1377}
1378
04de8381
KV		 1379void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1380{
1381 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1382 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1383
b5878a2d
JB		 1384 trace_api_beacon_loss(sdata);
1385
1e4dcd01
JO		 1386 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1387 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1388}
1389EXPORT_SYMBOL(ieee80211_beacon_loss);
1390
1e4dcd01
JO		 1391void ieee80211_connection_loss(struct ieee80211_vif *vif)
1392{
1393 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1394 struct ieee80211_hw *hw = &sdata->local->hw;
1395
b5878a2d
JB		 1396 trace_api_connection_loss(sdata);
1397
1e4dcd01
JO		 1398 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1399 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1400}
1401EXPORT_SYMBOL(ieee80211_connection_loss);
1402
1403
77fdaa12
JB		 1404static enum rx_mgmt_action __must_check
1405ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1406 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1407{
46900298 1408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1409 const u8 *bssid = NULL;
f0706e82
JB		 1410 u16 reason_code;
1411
f4ea83dd 1412 if (len < 24 + 2)
77fdaa12 1413 return RX_MGMT_NONE;
f0706e82 1414
77fdaa12
JB		 1415 ASSERT_MGD_MTX(ifmgd);
1416
0c1ad2ca 1417 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1418
1419 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1420
77fdaa12 1421 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1422 sdata->name, bssid, reason_code);
77fdaa12 1423
53f73c09 1424 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1425 mutex_lock(&sdata->local->mtx);
63f170e0 1426 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1427 mutex_unlock(&sdata->local->mtx);
f0706e82 1428
77fdaa12 1429 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1430}
1431
1432
77fdaa12
JB		 1433static enum rx_mgmt_action __must_check
1434ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1435 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1436{
46900298 1437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1438 u16 reason_code;
1439
f4ea83dd 1440 if (len < 24 + 2)
77fdaa12 1441 return RX_MGMT_NONE;
f0706e82 1442
77fdaa12
JB		 1443 ASSERT_MGD_MTX(ifmgd);
1444
1445 if (WARN_ON(!ifmgd->associated))
1446 return RX_MGMT_NONE;
1447
0c1ad2ca 1448 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1449 return RX_MGMT_NONE;
f0706e82
JB		 1450
1451 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1452
0ff71613 1453 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1454 sdata->name, mgmt->sa, reason_code);
f0706e82 1455
53f73c09 1456 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1457 mutex_lock(&sdata->local->mtx);
bc83b681 1458 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1459 mutex_unlock(&sdata->local->mtx);
77fdaa12 1460 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1461}
1462
1463
af6b6374
JB		 1464static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1465 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1466{
af6b6374 1467 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1469 struct ieee80211_local *local = sdata->local;
8318d78a 1470 struct ieee80211_supported_band *sband;
f0706e82 1471 struct sta_info *sta;
0c1ad2ca 1472 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1473 u8 *pos;
881d948c 1474 u32 rates, basic_rates;
af6b6374 1475 u16 capab_info, aid;
f0706e82 1476 struct ieee802_11_elems elems;
bda3933a 1477 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1478 u32 changed = 0;
5d1ec85f
JB		 1479 int i, j, err;
1480 bool have_higher_than_11mbit = false;
ae5eb026 1481 u16 ap_ht_cap_flags;
f0706e82 1482
af6b6374 1483 /* AssocResp and ReassocResp have identical structure */
f0706e82 1484
f0706e82 1485 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1486 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1487
1dd84aa2
JB		 1488 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1489 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1490 "set\n", sdata->name, aid);
1dd84aa2
JB		 1491 aid &= ~(BIT(15) | BIT(14));
1492
af6b6374
JB		 1493 pos = mgmt->u.assoc_resp.variable;
1494 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1495
f0706e82
JB		 1496 if (!elems.supp_rates) {
1497 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1498 sdata->name);
af6b6374 1499 return false;
f0706e82
JB		 1500 }
1501
46900298 1502 ifmgd->aid = aid;
f0706e82 1503
2a33bee2
GE		 1504 mutex_lock(&sdata->local->sta_mtx);
1505 /*
1506 * station info was already allocated and inserted before
1507 * the association and should be available to us
1508 */
1509 sta = sta_info_get_rx(sdata, cbss->bssid);
1510 if (WARN_ON(!sta)) {
1511 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1512 return false;
77fdaa12 1513 }
05e5e883 1514
5d1ec85f
JB		 1515 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1516 WLAN_STA_ASSOC_AP);
1517 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1518 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1519
60f8b39c
JB		 1520 rates = 0;
1521 basic_rates = 0;
e7480bbb 1522 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1523
60f8b39c
JB		 1524 for (i = 0; i < elems.supp_rates_len; i++) {
1525 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1526 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1527
60f8b39c
JB		 1528 if (rate > 110)
1529 have_higher_than_11mbit = true;
1530
1531 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1532 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1533 rates |= BIT(j);
d61272cb
TW		 1534 if (is_basic)
1535 basic_rates |= BIT(j);
1536 break;
1537 }
f709fc69 1538 }
f709fc69
LCC		 1539 }
1540
60f8b39c
JB		 1541 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1542 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1543 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1544
60f8b39c
JB		 1545 if (rate > 110)
1546 have_higher_than_11mbit = true;
f0706e82 1547
60f8b39c 1548 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1549 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1550 rates |= BIT(j);
d61272cb
TW		 1551 if (is_basic)
1552 basic_rates |= BIT(j);
1553 break;
1554 }
60f8b39c 1555 }
1ebebea8 1556 }
f0706e82 1557
e7480bbb 1558 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1559 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1560
1561 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1562 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1563 have_higher_than_11mbit)
1564 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1565 else
1566 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1567
ab1faead 1568 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1569 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1570 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1571
1572 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1573
4b7679a5 1574 rate_control_rate_init(sta);
f0706e82 1575
46900298 1576 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1577 set_sta_flags(sta, WLAN_STA_MFP);
1578
ddf4ac53 1579 if (elems.wmm_param)
60f8b39c 1580 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1581
2a33bee2
GE		 1582 /* sta_info_reinsert will also unlock the mutex lock */
1583 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1584 sta = NULL;
1585 if (err) {
1586 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1587 " the AP (error %d)\n", sdata->name, err);
90be561b 1588 return false;
ddf4ac53
JB		 1589 }
1590
f2176d72
JO		 1591 /*
1592 * Always handle WMM once after association regardless
1593 * of the first value the AP uses. Setting -1 here has
1594 * that effect because the AP values is an unsigned
1595 * 4-bit value.
1596 */
1597 ifmgd->wmm_last_param_set = -1;
1598
ddf4ac53 1599 if (elems.wmm_param)
4ced3f74 1600 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1601 elems.wmm_param_len);
aa837e1d
JB		 1602 else
1603 ieee80211_set_wmm_default(sdata);
f0706e82 1604
e4da8c37
JB		 1605 local->oper_channel = wk->chan;
1606
ae5eb026 1607 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1608 (sdata->local->hw.queues >= 4) &&
ab1faead 1609 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1610 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1611 cbss->bssid, ap_ht_cap_flags,
1612 false);
ae5eb026 1613
60f8b39c
JB		 1614 /* set AID and assoc capability,
1615 * ieee80211_set_associated() will tell the driver */
1616 bss_conf->aid = aid;
1617 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1618 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1619
d524215f
FF		 1620 /*
1621 * If we're using 4-addr mode, let the AP know that we're
1622 * doing so, so that it can create the STA VLAN on its side
1623 */
1624 if (ifmgd->use_4addr)
1625 ieee80211_send_4addr_nullfunc(local, sdata);
1626
15b7b062 1627 /*
b291ba11
JB		 1628 * Start timer to probe the connection to the AP now.
1629 * Also start the timer that will detect beacon loss.
15b7b062 1630 */
b291ba11 1631 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1632 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1633
af6b6374 1634 return true;
f0706e82
JB		 1635}
1636
1637
98c8fccf
JB		 1638static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1639 struct ieee80211_mgmt *mgmt,
1640 size_t len,
1641 struct ieee80211_rx_status *rx_status,
1642 struct ieee802_11_elems *elems,
1643 bool beacon)
1644{
1645 struct ieee80211_local *local = sdata->local;
1646 int freq;
c2b13452 1647 struct ieee80211_bss *bss;
98c8fccf 1648 struct ieee80211_channel *channel;
56007a02
JB		 1649 bool need_ps = false;
1650
1651 if (sdata->u.mgd.associated) {
1652 bss = (void *)sdata->u.mgd.associated->priv;
1653 /* not previously set so we may need to recalc */
1654 need_ps = !bss->dtim_period;
1655 }
98c8fccf
JB		 1656
1657 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1658 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1659 rx_status->band);
98c8fccf
JB		 1660 else
1661 freq = rx_status->freq;
1662
1663 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1664
1665 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1666 return;
1667
98c8fccf 1668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1669 channel, beacon);
77fdaa12
JB		 1670 if (bss)
1671 ieee80211_rx_bss_put(local, bss);
1672
1673 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1674 return;
1675
56007a02
JB		 1676 if (need_ps) {
1677 mutex_lock(&local->iflist_mtx);
1678 ieee80211_recalc_ps(local, -1);
1679 mutex_unlock(&local->iflist_mtx);
1680 }
1681
c481ec97 1682 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1683 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1684 ETH_ALEN) == 0)) {
c481ec97
S		 1685 struct ieee80211_channel_sw_ie *sw_elem =
1686 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1687 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1688 bss, rx_status->mactime);
c481ec97 1689 }
f0706e82
JB		 1690}
1691
1692
f698d856 1693static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1694 struct sk_buff *skb)
f0706e82 1695{
af6b6374 1696 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1697 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1698 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1699 size_t baselen, len = skb->len;
ae6a44e3
EK		 1700 struct ieee802_11_elems elems;
1701
15b7b062
KV		 1702 ifmgd = &sdata->u.mgd;
1703
77fdaa12
JB		 1704 ASSERT_MGD_MTX(ifmgd);
1705
47846c9b 1706 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1707 return; /* ignore ProbeResp to foreign address */
1708
ae6a44e3
EK		 1709 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1710 if (baselen > len)
1711 return;
1712
1713 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1714 &elems);
1715
98c8fccf 1716 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1717
77fdaa12 1718 if (ifmgd->associated &&
4e5ff376
FF		 1719 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1720 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1721}
1722
d91f36db
JB		 1723/*
1724 * This is the canonical list of information elements we care about,
1725 * the filter code also gives us all changes to the Microsoft OUI
1726 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1727 *
1728 * We implement beacon filtering in software since that means we can
1729 * avoid processing the frame here and in cfg80211, and userspace
1730 * will not be able to tell whether the hardware supports it or not.
1731 *
1732 * XXX: This list needs to be dynamic -- userspace needs to be able to
1733 * add items it requires. It also needs to be able to tell us to
1734 * look out for other vendor IEs.
1735 */
1736static const u64 care_about_ies =
1d4df3a5
JB		 1737 (1ULL << WLAN_EID_COUNTRY) |
1738 (1ULL << WLAN_EID_ERP_INFO) |
1739 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1740 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1741 (1ULL << WLAN_EID_HT_CAPABILITY) |
1742 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1743
f698d856 1744static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1745 struct ieee80211_mgmt *mgmt,
1746 size_t len,
1747 struct ieee80211_rx_status *rx_status)
1748{
d91f36db 1749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1750 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1751 size_t baselen;
1752 struct ieee802_11_elems elems;
f698d856 1753 struct ieee80211_local *local = sdata->local;
471b3efd 1754 u32 changed = 0;
d91f36db 1755 bool erp_valid, directed_tim = false;
7a5158ef 1756 u8 erp_value = 0;
d91f36db 1757 u32 ncrc;
77fdaa12
JB		 1758 u8 *bssid;
1759
1760 ASSERT_MGD_MTX(ifmgd);
f0706e82 1761
ae6a44e3
EK		 1762 /* Process beacon from the current BSS */
1763 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1764 if (baselen > len)
1765 return;
1766
d91f36db 1767 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1768 return;
f0706e82 1769
b291ba11
JB		 1770 /*
1771 * We might have received a number of frames, among them a
1772 * disassoc frame and a beacon...
1773 */
1774 if (!ifmgd->associated)
77fdaa12
JB		 1775 return;
1776
0c1ad2ca 1777 bssid = ifmgd->associated->bssid;
77fdaa12 1778
b291ba11
JB		 1779 /*
1780 * And in theory even frames from a different AP we were just
1781 * associated to a split-second ago!
1782 */
1783 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1784 return;
1785
17e4ec14
JM		 1786 /* Track average RSSI from the Beacon frames of the current AP */
1787 ifmgd->last_beacon_signal = rx_status->signal;
1788 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1789 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1790 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1791 ifmgd->last_cqm_event_signal = 0;
391a200a 1792 ifmgd->count_beacon_signal = 1;
615f7b9b 1793 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1794 } else {
1795 ifmgd->ave_beacon_signal =
1796 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1797 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1798 ifmgd->ave_beacon_signal) / 16;
391a200a 1799 ifmgd->count_beacon_signal++;
17e4ec14 1800 }
615f7b9b
MV		 1801
1802 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1803 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1804 int sig = ifmgd->ave_beacon_signal;
1805 int last_sig = ifmgd->last_ave_beacon_signal;
1806
1807 /*
1808 * if signal crosses either of the boundaries, invoke callback
1809 * with appropriate parameters
1810 */
1811 if (sig > ifmgd->rssi_max_thold &&
1812 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1813 ifmgd->last_ave_beacon_signal = sig;
1814 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1815 } else if (sig < ifmgd->rssi_min_thold &&
1816 (last_sig >= ifmgd->rssi_max_thold ||
1817 last_sig == 0)) {
1818 ifmgd->last_ave_beacon_signal = sig;
1819 drv_rssi_callback(local, RSSI_EVENT_LOW);
1820 }
1821 }
1822
17e4ec14 1823 if (bss_conf->cqm_rssi_thold &&
391a200a 1824 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1825 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1826 int sig = ifmgd->ave_beacon_signal / 16;
1827 int last_event = ifmgd->last_cqm_event_signal;
1828 int thold = bss_conf->cqm_rssi_thold;
1829 int hyst = bss_conf->cqm_rssi_hyst;
1830 if (sig < thold &&
1831 (last_event == 0 || sig < last_event - hyst)) {
1832 ifmgd->last_cqm_event_signal = sig;
1833 ieee80211_cqm_rssi_notify(
1834 &sdata->vif,
1835 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1836 GFP_KERNEL);
1837 } else if (sig > thold &&
1838 (last_event == 0 || sig > last_event + hyst)) {
1839 ifmgd->last_cqm_event_signal = sig;
1840 ieee80211_cqm_rssi_notify(
1841 &sdata->vif,
1842 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1843 GFP_KERNEL);
1844 }
1845 }
1846
b291ba11 1847 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1848#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1849 if (net_ratelimit()) {
1850 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1851 "to a received beacon\n", sdata->name);
92778180
JM		 1852 }
1853#endif
b291ba11 1854 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1855 mutex_lock(&local->iflist_mtx);
1856 ieee80211_recalc_ps(local, -1);
1857 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1858 }
1859
b291ba11
JB		 1860 /*
1861 * Push the beacon loss detection into the future since
1862 * we are processing a beacon from the AP just now.
1863 */
d3a910a8 1864 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1865
d91f36db
JB		 1866 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1867 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1868 len - baselen, &elems,
1869 care_about_ies, ncrc);
1870
1871 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1872 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1873 ifmgd->aid);
d91f36db 1874
d8ec4433 1875 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1876 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1877 true);
d91f36db 1878
4ced3f74 1879 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1880 elems.wmm_param_len);
1881 }
fe3fa827 1882
25c9c875 1883 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1884 if (directed_tim) {
572e0012
KV		 1885 if (local->hw.conf.dynamic_ps_timeout > 0) {
1886 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1887 ieee80211_hw_config(local,
1888 IEEE80211_CONF_CHANGE_PS);
1889 ieee80211_send_nullfunc(local, sdata, 0);
1890 } else {
1891 local->pspolling = true;
1892
1893 /*
1894 * Here is assumed that the driver will be
1895 * able to send ps-poll frame and receive a
1896 * response even though power save mode is
1897 * enabled, but some drivers might require
1898 * to disable power save here. This needs
1899 * to be investigated.
1900 */
1901 ieee80211_send_pspoll(local, sdata);
1902 }
a97b77b9
VN		 1903 }
1904 }
7a5158ef 1905
d8ec4433 1906 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1907 return;
1908 ifmgd->beacon_crc = ncrc;
d8ec4433 1909 ifmgd->beacon_crc_valid = true;
30196673 1910
7a5158ef
JB		 1911 if (elems.erp_info && elems.erp_info_len >= 1) {
1912 erp_valid = true;
1913 erp_value = elems.erp_info[0];
1914 } else {
1915 erp_valid = false;
50c4afb9 1916 }
7a5158ef
JB		 1917 changed |= ieee80211_handle_bss_capability(sdata,
1918 le16_to_cpu(mgmt->u.beacon.capab_info),
1919 erp_valid, erp_value);
f0706e82 1920
d3c990fb 1921
53d6f81c 1922 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1923 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1924 struct sta_info *sta;
1925 struct ieee80211_supported_band *sband;
1926 u16 ap_ht_cap_flags;
1927
1928 rcu_read_lock();
1929
abe60632 1930 sta = sta_info_get(sdata, bssid);
77fdaa12 1931 if (WARN_ON(!sta)) {
ae5eb026
JB		 1932 rcu_read_unlock();
1933 return;
1934 }
1935
1936 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1937
1938 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1939 elems.ht_cap_elem, &sta->sta.ht_cap);
1940
1941 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1942
1943 rcu_read_unlock();
1944
1945 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 1946 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 1947 }
1948
8b19e6ca 1949 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1950 if (elems.country_elem) {
a8302de9
VT		 1951 /* TODO: IBSS also needs this */
1952 if (elems.pwr_constr_elem)
1953 ieee80211_handle_pwr_constr(sdata,
1954 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1955 elems.pwr_constr_elem,
1956 elems.pwr_constr_elem_len);
3f2355cb
LR		 1957 }
1958
471b3efd 1959 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1960}
1961
1fa57d01
JB		 1962void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1963 struct sk_buff *skb)
f0706e82 1964{
77fdaa12 1965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1966 struct ieee80211_rx_status *rx_status;
f0706e82 1967 struct ieee80211_mgmt *mgmt;
77fdaa12 1968 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1969 u16 fc;
1970
f0706e82
JB		 1971 rx_status = (struct ieee80211_rx_status *) skb->cb;
1972 mgmt = (struct ieee80211_mgmt *) skb->data;
1973 fc = le16_to_cpu(mgmt->frame_control);
1974
77fdaa12
JB		 1975 mutex_lock(&ifmgd->mtx);
1976
1977 if (ifmgd->associated &&
0c1ad2ca 1978 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 1979 switch (fc & IEEE80211_FCTL_STYPE) {
1980 case IEEE80211_STYPE_BEACON:
1981 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1982 rx_status);
1983 break;
1984 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 1985 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 1986 break;
1987 case IEEE80211_STYPE_DEAUTH:
63f170e0 1988 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1989 break;
1990 case IEEE80211_STYPE_DISASSOC:
1991 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1992 break;
1993 case IEEE80211_STYPE_ACTION:
8b9a4e6e 1994 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 1995 case WLAN_CATEGORY_SPECTRUM_MGMT:
1996 ieee80211_sta_process_chanswitch(sdata,
1997 &mgmt->u.action.u.chan_switch.sw_elem,
1998 (void *)ifmgd->associated->priv,
1999 rx_status->mactime);
2000 break;
2001 }
77fdaa12
JB		 2002 }
2003 mutex_unlock(&ifmgd->mtx);
2004
2005 switch (rma) {
2006 case RX_MGMT_NONE:
2007 /* no action */
2008 break;
2009 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2010 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2011 break;
2012 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2013 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2014 break;
2015 default:
2016 WARN(1, "unexpected: %d", rma);
2017 }
36b3a628 2018 return;
77fdaa12
JB		 2019 }
2020
77fdaa12
JB		 2021 mutex_unlock(&ifmgd->mtx);
2022
63f170e0 2023 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2024 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2025 struct ieee80211_local *local = sdata->local;
2026 struct ieee80211_work *wk;
2027
a1699b75 2028 mutex_lock(&local->mtx);
b054b747
JB		 2029 list_for_each_entry(wk, &local->work_list, list) {
2030 if (wk->sdata != sdata)
2031 continue;
2032
e5b900d2
JB		 2033 if (wk->type != IEEE80211_WORK_ASSOC &&
2034 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2035 continue;
2036
2037 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2038 continue;
2039 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2040 continue;
2041
2042 /*
2043 * Printing the message only here means we can't
2044 * spuriously print it, but it also means that it
2045 * won't be printed when the frame comes in before
2046 * we even tried to associate or in similar cases.
2047 *
2048 * Ultimately, I suspect cfg80211 should print the
2049 * messages instead.
2050 */
2051 printk(KERN_DEBUG
2052 "%s: deauthenticated from %pM (Reason: %u)\n",
2053 sdata->name, mgmt->bssid,
2054 le16_to_cpu(mgmt->u.deauth.reason_code));
2055
2056 list_del_rcu(&wk->list);
2057 free_work(wk);
2058 break;
2059 }
a1699b75 2060 mutex_unlock(&local->mtx);
f0706e82 2061
ce470613 2062 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2063 }
f0706e82
JB		 2064}
2065
9c6bd790 2066static void ieee80211_sta_timer(unsigned long data)
f0706e82 2067{
60f8b39c
JB		 2068 struct ieee80211_sub_if_data *sdata =
2069 (struct ieee80211_sub_if_data *) data;
46900298 2070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2071 struct ieee80211_local *local = sdata->local;
f0706e82 2072
5bb644a0
JB		 2073 if (local->quiescing) {
2074 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2075 return;
2076 }
2077
64592c8f 2078 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2079}
2080
04ac3c0e 2081static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2082 u8 *bssid, u8 reason)
04ac3c0e
FF		 2083{
2084 struct ieee80211_local *local = sdata->local;
2085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2086
2087 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2088 IEEE80211_STA_BEACON_POLL);
2089
2090 ieee80211_set_disassoc(sdata, true, true);
2091 mutex_unlock(&ifmgd->mtx);
2092 mutex_lock(&local->mtx);
2093 ieee80211_recalc_idle(local);
2094 mutex_unlock(&local->mtx);
2095 /*
2096 * must be outside lock due to cfg80211,
2097 * but that's not a problem.
2098 */
2099 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2100 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2101 NULL, true);
2102 mutex_lock(&ifmgd->mtx);
2103}
2104
1fa57d01 2105void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2106{
9c6bd790 2107 struct ieee80211_local *local = sdata->local;
1fa57d01 2108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2109
77fdaa12
JB		 2110 /* then process the rest of the work */
2111 mutex_lock(&ifmgd->mtx);
2112
b291ba11
JB		 2113 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2114 IEEE80211_STA_CONNECTION_POLL) &&
2115 ifmgd->associated) {
a43abf29 2116 u8 bssid[ETH_ALEN];
72a8a3ed 2117 int max_tries;
a43abf29 2118
0c1ad2ca 2119 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2120
72a8a3ed 2121 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2122 max_tries = max_nullfunc_tries;
72a8a3ed 2123 else
180205bd 2124 max_tries = max_probe_tries;
72a8a3ed 2125
4e5ff376
FF		 2126 /* ACK received for nullfunc probing frame */
2127 if (!ifmgd->probe_send_count)
2128 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2129 else if (ifmgd->nullfunc_failed) {
2130 if (ifmgd->probe_send_count < max_tries) {
2131#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2132 wiphy_debug(local->hw.wiphy,
2133 "%s: No ack for nullfunc frame to"
bfc31df3 2134 " AP %pM, try %d/%i\n",
04ac3c0e 2135 sdata->name, bssid,
bfc31df3 2136 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2137#endif
2138 ieee80211_mgd_probe_ap_send(sdata);
2139 } else {
2140#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2141 wiphy_debug(local->hw.wiphy,
2142 "%s: No ack for nullfunc frame to"
2143 " AP %pM, disconnecting.\n",
c658e5db 2144 sdata->name, bssid);
04ac3c0e 2145#endif
95acac61
JB		 2146 ieee80211_sta_connection_lost(sdata, bssid,
2147 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2148 }
2149 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2150 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2151 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2152#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2153 wiphy_debug(local->hw.wiphy,
2154 "%s: Failed to send nullfunc to AP %pM"
2155 " after %dms, disconnecting.\n",
2156 sdata->name,
180205bd 2157 bssid, probe_wait_ms);
04ac3c0e 2158#endif
95acac61
JB		 2159 ieee80211_sta_connection_lost(sdata, bssid,
2160 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2161 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2162#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2163 wiphy_debug(local->hw.wiphy,
2164 "%s: No probe response from AP %pM"
bfc31df3 2165 " after %dms, try %d/%i\n",
b38afa87 2166 sdata->name,
180205bd 2167 bssid, probe_wait_ms,
bfc31df3 2168 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2169#endif
2170 ieee80211_mgd_probe_ap_send(sdata);
2171 } else {
b291ba11
JB		 2172 /*
2173 * We actually lost the connection ... or did we?
2174 * Let's make sure!
2175 */
b38afa87
BG		 2176 wiphy_debug(local->hw.wiphy,
2177 "%s: No probe response from AP %pM"
2178 " after %dms, disconnecting.\n",
2179 sdata->name,
180205bd 2180 bssid, probe_wait_ms);
04ac3c0e 2181
95acac61
JB		 2182 ieee80211_sta_connection_lost(sdata, bssid,
2183 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2184 }
2185 }
2186
77fdaa12 2187 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2188}
2189
b291ba11
JB		 2190static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2191{
2192 struct ieee80211_sub_if_data *sdata =
2193 (struct ieee80211_sub_if_data *) data;
2194 struct ieee80211_local *local = sdata->local;
2195
2196 if (local->quiescing)
2197 return;
2198
1e4dcd01
JO		 2199 ieee80211_queue_work(&sdata->local->hw,
2200 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2201}
2202
2203static void ieee80211_sta_conn_mon_timer(unsigned long data)
2204{
2205 struct ieee80211_sub_if_data *sdata =
2206 (struct ieee80211_sub_if_data *) data;
2207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2208 struct ieee80211_local *local = sdata->local;
2209
2210 if (local->quiescing)
2211 return;
2212
42935eca 2213 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2214}
2215
2216static void ieee80211_sta_monitor_work(struct work_struct *work)
2217{
2218 struct ieee80211_sub_if_data *sdata =
2219 container_of(work, struct ieee80211_sub_if_data,
2220 u.mgd.monitor_work);
2221
2222 ieee80211_mgd_probe_ap(sdata, false);
2223}
2224
9c6bd790
JB		 2225static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2226{
ad935687 2227 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2228 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2229 IEEE80211_STA_CONNECTION_POLL);
ad935687 2230
b291ba11 2231 /* let's probe the connection once */
42935eca 2232 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2233 &sdata->u.mgd.monitor_work);
2234 /* and do all the other regular work too */
64592c8f 2235 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2236 }
9c6bd790 2237}
f0706e82 2238
5bb644a0
JB		 2239#ifdef CONFIG_PM
2240void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2241{
2242 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2243
2244 /*
2245 * we need to use atomic bitops for the running bits
2246 * only because both timers might fire at the same
2247 * time -- the code here is properly synchronised.
2248 */
2249
d1f5b7a3
JB		 2250 cancel_work_sync(&ifmgd->request_smps_work);
2251
1e4dcd01 2252 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2253 if (del_timer_sync(&ifmgd->timer))
2254 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2255
2256 cancel_work_sync(&ifmgd->chswitch_work);
2257 if (del_timer_sync(&ifmgd->chswitch_timer))
2258 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2259
2260 cancel_work_sync(&ifmgd->monitor_work);
2261 /* these will just be re-established on connection */
2262 del_timer_sync(&ifmgd->conn_mon_timer);
2263 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2264}
2265
2266void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2267{
2268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2269
676b58c2
RM		 2270 if (!ifmgd->associated)
2271 return;
2272
95acac61
JB		 2273 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2274 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2275 mutex_lock(&ifmgd->mtx);
2276 if (ifmgd->associated) {
2277#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2278 wiphy_debug(sdata->local->hw.wiphy,
2279 "%s: driver requested disconnect after resume.\n",
2280 sdata->name);
2281#endif
2282 ieee80211_sta_connection_lost(sdata,
2283 ifmgd->associated->bssid,
2284 WLAN_REASON_UNSPECIFIED);
2285 mutex_unlock(&ifmgd->mtx);
2286 return;
2287 }
2288 mutex_unlock(&ifmgd->mtx);
2289 }
2290
5bb644a0
JB		 2291 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2292 add_timer(&ifmgd->timer);
2293 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2294 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2295 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2296 ieee80211_restart_sta_timer(sdata);
a6af1d84 2297 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2298}
2299#endif
2300
9c6bd790
JB		 2301/* interface setup */
2302void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2303{
46900298 2304 struct ieee80211_if_managed *ifmgd;
988c0f72 2305
46900298 2306 ifmgd = &sdata->u.mgd;
b291ba11 2307 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2308 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2309 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2310 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2311 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2312 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2313 (unsigned long) sdata);
b291ba11
JB		 2314 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2315 (unsigned long) sdata);
2316 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2317 (unsigned long) sdata);
46900298 2318 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2319 (unsigned long) sdata);
9c6bd790 2320
ab1faead 2321 ifmgd->flags = 0;
bbbdff9e 2322
77fdaa12 2323 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2324
2325 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2326 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2327 else
2328 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2329}
2330
77fdaa12
JB		 2331/* scan finished notification */
2332void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2333{
77fdaa12 2334 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2335
77fdaa12
JB		 2336 /* Restart STA timers */
2337 rcu_read_lock();
2338 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2339 ieee80211_restart_sta_timer(sdata);
2340 rcu_read_unlock();
2341}
60f8b39c 2342
77fdaa12
JB		 2343int ieee80211_max_network_latency(struct notifier_block *nb,
2344 unsigned long data, void *dummy)
2345{
2346 s32 latency_usec = (s32) data;
2347 struct ieee80211_local *local =
2348 container_of(nb, struct ieee80211_local,
2349 network_latency_notifier);
1fa6f4af 2350
77fdaa12
JB		 2351 mutex_lock(&local->iflist_mtx);
2352 ieee80211_recalc_ps(local, latency_usec);
2353 mutex_unlock(&local->iflist_mtx);
dfe67012 2354
77fdaa12 2355 return 0;
9c6bd790
JB		 2356}
2357
77fdaa12 2358/* config hooks */
af6b6374
JB		 2359static enum work_done_result
2360ieee80211_probe_auth_done(struct ieee80211_work *wk,
2361 struct sk_buff *skb)
2362{
b2abb6e2
JB		 2363 struct ieee80211_local *local = wk->sdata->local;
2364
af6b6374
JB		 2365 if (!skb) {
2366 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2367 goto destroy;
af6b6374
JB		 2368 }
2369
2370 if (wk->type == IEEE80211_WORK_AUTH) {
2371 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2372 goto destroy;
af6b6374
JB		 2373 }
2374
2375 mutex_lock(&wk->sdata->u.mgd.mtx);
2376 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2377 mutex_unlock(&wk->sdata->u.mgd.mtx);
2378
2379 wk->type = IEEE80211_WORK_AUTH;
2380 wk->probe_auth.tries = 0;
2381 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2382 destroy:
2383 if (wk->probe_auth.synced)
2384 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2385 IEEE80211_TX_SYNC_AUTH);
2386
2387 return WORK_DONE_DESTROY;
af6b6374
JB		 2388}
2389
77fdaa12
JB		 2390int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2391 struct cfg80211_auth_request *req)
9c6bd790 2392{
77fdaa12 2393 const u8 *ssid;
f679f65d 2394 struct ieee80211_work *wk;
77fdaa12 2395 u16 auth_alg;
9c6bd790 2396
d5cdfacb
JM		 2397 if (req->local_state_change)
2398 return 0; /* no need to update mac80211 state */
2399
77fdaa12
JB		 2400 switch (req->auth_type) {
2401 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2402 auth_alg = WLAN_AUTH_OPEN;
2403 break;
2404 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2405 if (IS_ERR(sdata->local->wep_tx_tfm))
2406 return -EOPNOTSUPP;
77fdaa12
JB		 2407 auth_alg = WLAN_AUTH_SHARED_KEY;
2408 break;
2409 case NL80211_AUTHTYPE_FT:
2410 auth_alg = WLAN_AUTH_FT;
2411 break;
2412 case NL80211_AUTHTYPE_NETWORK_EAP:
2413 auth_alg = WLAN_AUTH_LEAP;
2414 break;
2415 default:
2416 return -EOPNOTSUPP;
60f8b39c 2417 }
77fdaa12
JB		 2418
2419 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2420 if (!wk)
9c6bd790 2421 return -ENOMEM;
77fdaa12 2422
5e124bd5 2423 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2424
2425 if (req->ie && req->ie_len) {
2426 memcpy(wk->ie, req->ie, req->ie_len);
2427 wk->ie_len = req->ie_len;
9c6bd790 2428 }
77fdaa12 2429
fffd0934 2430 if (req->key && req->key_len) {
af6b6374
JB		 2431 wk->probe_auth.key_len = req->key_len;
2432 wk->probe_auth.key_idx = req->key_idx;
2433 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2434 }
2435
77fdaa12 2436 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2437 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2438 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2439
af6b6374
JB		 2440 wk->probe_auth.algorithm = auth_alg;
2441 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2442
070bb547
JB		 2443 /* if we already have a probe, don't probe again */
2444 if (req->bss->proberesp_ies)
2445 wk->type = IEEE80211_WORK_AUTH;
2446 else
2447 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2448 wk->chan = req->bss->channel;
4d51e149 2449 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2450 wk->sdata = sdata;
2451 wk->done = ieee80211_probe_auth_done;
77fdaa12 2452
af6b6374 2453 ieee80211_add_work(wk);
9c6bd790 2454 return 0;
60f8b39c
JB		 2455}
2456
2a33bee2
GE		 2457/* create and insert a dummy station entry */
2458static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2459 u8 *bssid) {
2460 struct sta_info *sta;
2461 int err;
2462
2463 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2464 if (!sta)
2a33bee2 2465 return -ENOMEM;
2a33bee2
GE		 2466
2467 sta->dummy = true;
2468
2469 err = sta_info_insert(sta);
2470 sta = NULL;
2471 if (err) {
2472 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2473 " the AP (error %d)\n", sdata->name, err);
2474 return err;
2475 }
2476
2477 return 0;
2478}
2479
af6b6374
JB		 2480static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2481 struct sk_buff *skb)
2482{
b2abb6e2 2483 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2484 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2485 struct ieee80211_rx_status *rx_status;
2486 struct ieee802_11_elems elems;
2a33bee2 2487 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2488 u16 status;
2489
2490 if (!skb) {
2a33bee2 2491 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2492 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2493 goto destroy;
af6b6374
JB		 2494 }
2495
e5b900d2
JB		 2496 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2497 mutex_lock(&wk->sdata->u.mgd.mtx);
2498 rx_status = (void *) skb->cb;
2499 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2500 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2501 &elems, true);
2502 mutex_unlock(&wk->sdata->u.mgd.mtx);
2503
2504 wk->type = IEEE80211_WORK_ASSOC;
2505 /* not really done yet */
2506 return WORK_DONE_REQUEUE;
2507 }
2508
af6b6374
JB		 2509 mgmt = (void *)skb->data;
2510 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2511
2512 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2513 if (wk->assoc.synced)
2514 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2515 IEEE80211_TX_SYNC_ASSOC);
2516
af6b6374
JB		 2517 mutex_lock(&wk->sdata->u.mgd.mtx);
2518 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2519 mutex_unlock(&wk->sdata->u.mgd.mtx);
2520 /* oops -- internal error -- send timeout for now */
2a33bee2 2521 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2522 cfg80211_send_assoc_timeout(wk->sdata->dev,
2523 wk->filter_ta);
2524 return WORK_DONE_DESTROY;
2525 }
68542962
JO		 2526
2527 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2528 } else {
2529 /* assoc failed - destroy the dummy station entry */
2530 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2531 }
2532
2533 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2534 destroy:
2535 if (wk->assoc.synced)
2536 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2537 IEEE80211_TX_SYNC_ASSOC);
2538
af6b6374
JB		 2539 return WORK_DONE_DESTROY;
2540}
2541
77fdaa12
JB		 2542int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2543 struct cfg80211_assoc_request *req)
f0706e82 2544{
77fdaa12 2545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2546 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2547 struct ieee80211_work *wk;
63f170e0 2548 const u8 *ssid;
2a33bee2 2549 int i, err;
f0706e82 2550
77fdaa12 2551 mutex_lock(&ifmgd->mtx);
af6b6374 2552 if (ifmgd->associated) {
9c87ba67
JM		 2553 if (!req->prev_bssid ||
2554 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2555 ETH_ALEN)) {
2556 /*
2557 * We are already associated and the request was not a
2558 * reassociation request from the current BSS, so
2559 * reject it.
2560 */
2561 mutex_unlock(&ifmgd->mtx);
2562 return -EALREADY;
2563 }
2564
2565 /* Trying to reassociate - clear previous association state */
53f73c09 2566 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2567 }
2568 mutex_unlock(&ifmgd->mtx);
77fdaa12 2569
63f170e0 2570 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2571 if (!wk)
2572 return -ENOMEM;
77fdaa12 2573
2a33bee2
GE		 2574 /*
2575 * create a dummy station info entry in order
2576 * to start accepting incoming EAPOL packets from the station
2577 */
2578 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2579 if (err) {
2580 kfree(wk);
2581 return err;
2582 }
2583
77fdaa12 2584 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2585 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2586
d8ec4433
JO		 2587 ifmgd->beacon_crc_valid = false;
2588
77fdaa12
JB		 2589 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2590 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2591 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2592 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2593 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2594
77fdaa12
JB		 2595
2596 if (req->ie && req->ie_len) {
2597 memcpy(wk->ie, req->ie, req->ie_len);
2598 wk->ie_len = req->ie_len;
2599 } else
2600 wk->ie_len = 0;
2601
0c1ad2ca 2602 wk->assoc.bss = req->bss;
f679f65d 2603
af6b6374 2604 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2605
af6b6374
JB		 2606 /* new association always uses requested smps mode */
2607 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2608 if (ifmgd->powersave)
2609 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2610 else
2611 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2612 } else
2613 ifmgd->ap_smps = ifmgd->req_smps;
2614
2615 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2616 /*
2617 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2618 * We still associate in non-HT mode (11a/b/g) if any one of these
2619 * ciphers is configured as pairwise.
2620 * We can set this to true for non-11n hardware, that'll be checked
2621 * separately along with the peer capabilities.
2622 */
af6b6374 2623 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2624 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2625 wk->assoc.wmm_used = bss->wmm_used;
2626 wk->assoc.supp_rates = bss->supp_rates;
2627 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2628 wk->assoc.ht_information_ie =
2629 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2630
ab13315a
KV		 2631 if (bss->wmm_used && bss->uapsd_supported &&
2632 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2633 wk->assoc.uapsd_used = true;
2634 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2635 } else {
2636 wk->assoc.uapsd_used = false;
2637 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2638 }
2639
63f170e0 2640 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2641 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2642 wk->assoc.ssid_len = ssid[1];
63f170e0 2643
77fdaa12 2644 if (req->prev_bssid)
f679f65d 2645 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2646
f679f65d 2647 wk->chan = req->bss->channel;
4d51e149 2648 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2649 wk->sdata = sdata;
2650 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2651 if (!bss->dtim_period &&
2652 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2653 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2654 else
2655 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2656
2657 if (req->use_mfp) {
2658 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2659 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2660 } else {
2661 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2662 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2663 }
2664
2665 if (req->crypto.control_port)
2666 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2667 else
2668 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2669
a621fa4d
JB		 2670 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2671 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2672
af6b6374
JB		 2673 ieee80211_add_work(wk);
2674 return 0;
f0706e82
JB		 2675}
2676
77fdaa12 2677int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2678 struct cfg80211_deauth_request *req,
2679 void *cookie)
f0706e82 2680{
af6b6374 2681 struct ieee80211_local *local = sdata->local;
46900298 2682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2683 struct ieee80211_work *wk;
05e48e8e
JM		 2684 u8 bssid[ETH_ALEN];
2685 bool assoc_bss = false;
f0706e82 2686
77fdaa12
JB		 2687 mutex_lock(&ifmgd->mtx);
2688
05e48e8e 2689 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2690 if (ifmgd->associated == req->bss) {
53f73c09 2691 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2692 mutex_unlock(&ifmgd->mtx);
05e48e8e 2693 assoc_bss = true;
af6b6374
JB		 2694 } else {
2695 bool not_auth_yet = false;
f0706e82 2696
a58ce43f 2697 mutex_unlock(&ifmgd->mtx);
a58ce43f 2698
a1699b75 2699 mutex_lock(&local->mtx);
af6b6374 2700 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2701 if (wk->sdata != sdata)
af6b6374 2702 continue;
29165e4c
JB		 2703
2704 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2705 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2706 wk->type != IEEE80211_WORK_ASSOC &&
2707 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2708 continue;
2709
af6b6374
JB		 2710 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2711 continue;
29165e4c
JB		 2712
2713 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2714 list_del_rcu(&wk->list);
af6b6374
JB		 2715 free_work(wk);
2716 break;
2717 }
a1699b75 2718 mutex_unlock(&local->mtx);
af6b6374
JB		 2719
2720 /*
2721 * If somebody requests authentication and we haven't
2722 * sent out an auth frame yet there's no need to send
2723 * out a deauth frame either. If the state was PROBE,
2724 * then this is the case. If it's AUTH we have sent a
2725 * frame, and if it's IDLE we have completed the auth
2726 * process already.
2727 */
2728 if (not_auth_yet) {
2729 __cfg80211_auth_canceled(sdata->dev, bssid);
2730 return 0;
2731 }
2732 }
77fdaa12 2733
0ff71613 2734 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2735 sdata->name, bssid, req->reason_code);
0ff71613 2736
d5cdfacb
JM		 2737 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2738 req->reason_code, cookie,
2739 !req->local_state_change);
05e48e8e
JM		 2740 if (assoc_bss)
2741 sta_info_destroy_addr(sdata, bssid);
f0706e82 2742
7da7cc1d 2743 mutex_lock(&sdata->local->mtx);
bc83b681 2744 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2745 mutex_unlock(&sdata->local->mtx);
bc83b681 2746
f0706e82
JB		 2747 return 0;
2748}
84363e6e 2749
77fdaa12 2750int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2751 struct cfg80211_disassoc_request *req,
2752 void *cookie)
9c6bd790 2753{
77fdaa12 2754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2755 u8 bssid[ETH_ALEN];
9c6bd790 2756
77fdaa12 2757 mutex_lock(&ifmgd->mtx);
10f644a4 2758
8d8b261a
JB		 2759 /*
2760 * cfg80211 should catch this ... but it's racy since
2761 * we can receive a disassoc frame, process it, hand it
2762 * to cfg80211 while that's in a locked section already
2763 * trying to tell us that the user wants to disconnect.
2764 */
0c1ad2ca 2765 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2766 mutex_unlock(&ifmgd->mtx);
2767 return -ENOLINK;
2768 }
2769
0ff71613 2770 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2771 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2772
e69e95db 2773 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2774 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2775
2776 mutex_unlock(&ifmgd->mtx);
10f644a4 2777
77fdaa12 2778 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2779 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2780 cookie, !req->local_state_change);
e69e95db 2781 sta_info_destroy_addr(sdata, bssid);
bc83b681 2782
7da7cc1d 2783 mutex_lock(&sdata->local->mtx);
bc83b681 2784 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2785 mutex_unlock(&sdata->local->mtx);
bc83b681 2786
10f644a4
JB		 2787 return 0;
2788}
026331c4 2789
a97c13c3
JO		 2790void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2791 enum nl80211_cqm_rssi_threshold_event rssi_event,
2792 gfp_t gfp)
2793{
2794 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2795
b5878a2d
JB		 2796 trace_api_cqm_rssi_notify(sdata, rssi_event);
2797
a97c13c3
JO		 2798 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2799}
2800EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2801
2802unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2803{
2804 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2805 return sdata->dev->operstate;
2806}
2807EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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