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wireless: use strlcpy routine in .get_drvinfo
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
e8db0be1 20#include <linux/pm_qos.h>
d91f36db 21#include <linux/crc32.h>
5a0e3ad6 22#include <linux/slab.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
24487981 27#include "driver-ops.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
180205bd
BG		 31static int max_nullfunc_tries = 2;
32module_param(max_nullfunc_tries, int, 0644);
33MODULE_PARM_DESC(max_nullfunc_tries,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
35
36static int max_probe_tries = 5;
37module_param(max_probe_tries, int, 0644);
38MODULE_PARM_DESC(max_probe_tries,
39 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 40
41/*
7ccc8bd7
FF		 42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
b291ba11 48 */
7ccc8bd7
FF		 49#define IEEE80211_BEACON_LOSS_COUNT 7
50
b291ba11
JB		 51/*
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
54 */
d1c5091f 55#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 56/*
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
60 */
180205bd
BG		 61static int probe_wait_ms = 500;
62module_param(probe_wait_ms, int, 0644);
63MODULE_PARM_DESC(probe_wait_ms,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
f0706e82 66
17e4ec14
JM		 67/*
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
70 * between 1 and 15.
71 */
72#define IEEE80211_SIGNAL_AVE_WEIGHT 3
73
391a200a
JM		 74/*
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
77 */
78#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
79
5bb644a0
JB		 80#define TMR_RUNNING_TIMER 0
81#define TMR_RUNNING_CHANSW 1
82
77fdaa12
JB		 83/*
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
88 */
89enum rx_mgmt_action {
90 /* no action required */
91 RX_MGMT_NONE,
92
77fdaa12
JB		 93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH,
95
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC,
77fdaa12
JB		 98};
99
5484e237 100/* utils */
77fdaa12
JB		 101static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
102{
46a5ebaf 103 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 104}
105
ca386f31
JB		 106/*
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
114 * do that.
115 */
116static void run_again(struct ieee80211_if_managed *ifmgd,
117 unsigned long timeout)
118{
119 ASSERT_MGD_MTX(ifmgd);
120
121 if (!timer_pending(&ifmgd->timer) ||
122 time_before(timeout, ifmgd->timer.expires))
123 mod_timer(&ifmgd->timer, timeout);
124}
125
d3a910a8 126void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11
JB		 127{
128 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
129 return;
130
131 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 132 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 133}
134
be099e82
LR		 135void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
136{
0c699c3a
LR		 137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
138
8628172f
SG		 139 if (unlikely(!sdata->u.mgd.associated))
140 return;
141
be099e82
LR		 142 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
143 return;
144
145 mod_timer(&sdata->u.mgd.conn_mon_timer,
146 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 147
148 ifmgd->probe_send_count = 0;
be099e82
LR		 149}
150
5484e237 151static int ecw2cw(int ecw)
60f8b39c 152{
5484e237 153 return (1 << ecw) - 1;
60f8b39c
JB		 154}
155
d5522e03
JB		 156/*
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
160 */
161static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
162 struct ieee80211_ht_info *hti,
7cc44ed4
RM		 163 const u8 *bssid, u16 ap_ht_cap_flags,
164 bool beacon_htcap_ie)
d5522e03
JB		 165{
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_supported_band *sband;
d5522e03
JB		 168 struct sta_info *sta;
169 u32 changed = 0;
172710bf 170 int hti_cfreq;
9ed6bcce 171 u16 ht_opmode;
0aaffa9b
JB		 172 bool enable_ht = true;
173 enum nl80211_channel_type prev_chantype;
d5522e03
JB		 174 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
175
176 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
177
0aaffa9b
JB		 178 prev_chantype = sdata->vif.bss_conf.channel_type;
179
d5522e03
JB		 180 /* HT is not supported */
181 if (!sband->ht_cap.ht_supported)
182 enable_ht = false;
183
172710bf
BG		 184 if (enable_ht) {
185 hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan,
186 sband->band);
187 /* check that channel matches the right operating channel */
188 if (local->hw.conf.channel->center_freq != hti_cfreq) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
192 */
193 printk(KERN_DEBUG
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
198 sdata->name,
199 local->hw.conf.channel->center_freq,
200 hti_cfreq, hti->control_chan,
201 sband->band);
202 enable_ht = false;
203 }
204 }
d5522e03
JB		 205
206 if (enable_ht) {
207 channel_type = NL80211_CHAN_HT20;
208
209 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
210 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
211 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
212 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 214 if (!(local->hw.conf.channel->flags &
215 IEEE80211_CHAN_NO_HT40PLUS))
216 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 217 break;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 219 if (!(local->hw.conf.channel->flags &
220 IEEE80211_CHAN_NO_HT40MINUS))
221 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 222 break;
223 }
224 }
225 }
226
fe6f212c
RC		 227 if (local->tmp_channel)
228 local->tmp_channel_type = channel_type;
d5522e03 229
0aaffa9b
JB		 230 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type = NL80211_CHAN_HT20;
233 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
234 }
d5522e03 235
7cc44ed4
RM		 236 if (beacon_htcap_ie && (prev_chantype != channel_type)) {
237 /*
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
241 */
242 ieee80211_stop_queues_by_reason(&sdata->local->hw,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
244
245 /* flush out all packets */
246 synchronize_net();
247
248 drv_flush(local, false);
249 }
250
0aaffa9b
JB		 251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local, 0);
d5522e03 253
0aaffa9b 254 if (prev_chantype != channel_type) {
d5522e03 255 rcu_read_lock();
abe60632 256 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 257 if (sta)
258 rate_control_rate_update(local, sband, sta,
4fa00437 259 IEEE80211_RC_HT_CHANGED,
0aaffa9b 260 channel_type);
d5522e03 261 rcu_read_unlock();
7cc44ed4
RM		 262
263 if (beacon_htcap_ie)
264 ieee80211_wake_queues_by_reason(&sdata->local->hw,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE);
0aaffa9b 266 }
d5522e03 267
9ed6bcce 268 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 269
270 /* if bss configuration changed store the new one */
0aaffa9b
JB		 271 if (sdata->ht_opmode_valid != enable_ht ||
272 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
273 prev_chantype != channel_type) {
d5522e03 274 changed |= BSS_CHANGED_HT;
9ed6bcce 275 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
0aaffa9b 276 sdata->ht_opmode_valid = enable_ht;
d5522e03
JB		 277 }
278
279 return changed;
280}
281
9c6bd790
JB		 282/* frame sending functions */
283
ef422bc0 284static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd 285 const u8 *bssid, u16 stype, u16 reason,
d5cdfacb 286 void *cookie, bool send_frame)
9ac19a90
JB		 287{
288 struct ieee80211_local *local = sdata->local;
46900298 289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 290 struct sk_buff *skb;
291 struct ieee80211_mgmt *mgmt;
9aed3cc1 292
65fc73ac 293 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
d15b8459 294 if (!skb)
9ac19a90 295 return;
d15b8459 296
9ac19a90
JB		 297 skb_reserve(skb, local->hw.extra_tx_headroom);
298
299 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
300 memset(mgmt, 0, 24);
77fdaa12 301 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 305 skb_put(skb, 2);
ef422bc0 306 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 307 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
308
53b46b84 309 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 310 if (cookie)
311 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
312 else
313 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 314 else
ce470613
HS		 315 if (cookie)
316 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
317 else
318 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 319 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb
JM		 321
322 if (send_frame)
323 ieee80211_tx_skb(sdata, skb);
324 else
325 kfree_skb(skb);
9ac19a90
JB		 326}
327
572e0012
KV		 328void ieee80211_send_pspoll(struct ieee80211_local *local,
329 struct ieee80211_sub_if_data *sdata)
330{
572e0012
KV		 331 struct ieee80211_pspoll *pspoll;
332 struct sk_buff *skb;
572e0012 333
d8cd189e
KV		 334 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
335 if (!skb)
572e0012 336 return;
572e0012 337
d8cd189e
KV		 338 pspoll = (struct ieee80211_pspoll *) skb->data;
339 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 340
62ae67be
JB		 341 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
342 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 343}
344
965bedad
JB		 345void ieee80211_send_nullfunc(struct ieee80211_local *local,
346 struct ieee80211_sub_if_data *sdata,
347 int powersave)
348{
349 struct sk_buff *skb;
d8cd189e 350 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 352
d8cd189e
KV		 353 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
354 if (!skb)
965bedad 355 return;
965bedad 356
d8cd189e 357 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 358 if (powersave)
d8cd189e 359 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 360
62ae67be 361 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 362 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
363 IEEE80211_STA_CONNECTION_POLL))
364 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
365
62ae67be 366 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 367}
368
d524215f
FF		 369static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
370 struct ieee80211_sub_if_data *sdata)
371{
372 struct sk_buff *skb;
373 struct ieee80211_hdr *nullfunc;
374 __le16 fc;
375
376 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
377 return;
378
379 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 380 if (!skb)
d524215f 381 return;
d15b8459 382
d524215f
FF		 383 skb_reserve(skb, local->hw.extra_tx_headroom);
384
385 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
386 memset(nullfunc, 0, 30);
387 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
388 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
389 nullfunc->frame_control = fc;
390 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
391 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
392 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
393 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
394
395 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
396 ieee80211_tx_skb(sdata, skb);
397}
398
cc32abd4
JB		 399/* spectrum management related things */
400static void ieee80211_chswitch_work(struct work_struct *work)
401{
402 struct ieee80211_sub_if_data *sdata =
403 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
405
9607e6b6 406 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 407 return;
408
77fdaa12
JB		 409 mutex_lock(&ifmgd->mtx);
410 if (!ifmgd->associated)
411 goto out;
cc32abd4
JB		 412
413 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 414 if (!sdata->local->ops->channel_switch) {
415 /* call "hw_config" only if doing sw channel switch */
416 ieee80211_hw_config(sdata->local,
417 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 418 } else {
419 /* update the device channel directly */
420 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 421 }
77fdaa12 422
cc32abd4 423 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 424 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 425
cc32abd4
JB		 426 ieee80211_wake_queues_by_reason(&sdata->local->hw,
427 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 428 out:
429 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
430 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 431}
432
5ce6e438
JB		 433void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
434{
435 struct ieee80211_sub_if_data *sdata;
436 struct ieee80211_if_managed *ifmgd;
437
438 sdata = vif_to_sdata(vif);
439 ifmgd = &sdata->u.mgd;
440
441 trace_api_chswitch_done(sdata, success);
442 if (!success) {
443 /*
444 * If the channel switch was not successful, stay
445 * around on the old channel. We currently lack
446 * good handling of this situation, possibly we
447 * should just drop the association.
448 */
449 sdata->local->csa_channel = sdata->local->oper_channel;
450 }
451
452 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
453}
454EXPORT_SYMBOL(ieee80211_chswitch_done);
455
cc32abd4
JB		 456static void ieee80211_chswitch_timer(unsigned long data)
457{
458 struct ieee80211_sub_if_data *sdata =
459 (struct ieee80211_sub_if_data *) data;
460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
461
5bb644a0
JB		 462 if (sdata->local->quiescing) {
463 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
464 return;
465 }
466
42935eca 467 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 468}
469
470void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
471 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 472 struct ieee80211_bss *bss,
473 u64 timestamp)
cc32abd4 474{
0c1ad2ca
JB		 475 struct cfg80211_bss *cbss =
476 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 477 struct ieee80211_channel *new_ch;
478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 479 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
480 cbss->channel->band);
cc32abd4 481
77fdaa12
JB		 482 ASSERT_MGD_MTX(ifmgd);
483
484 if (!ifmgd->associated)
cc32abd4
JB		 485 return;
486
fbe9c429 487 if (sdata->local->scanning)
cc32abd4
JB		 488 return;
489
490 /* Disregard subsequent beacons if we are already running a timer
491 processing a CSA */
492
493 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
494 return;
495
496 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
497 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
498 return;
499
500 sdata->local->csa_channel = new_ch;
501
5ce6e438
JB		 502 if (sdata->local->ops->channel_switch) {
503 /* use driver's channel switch callback */
504 struct ieee80211_channel_switch ch_switch;
505 memset(&ch_switch, 0, sizeof(ch_switch));
506 ch_switch.timestamp = timestamp;
507 if (sw_elem->mode) {
508 ch_switch.block_tx = true;
509 ieee80211_stop_queues_by_reason(&sdata->local->hw,
510 IEEE80211_QUEUE_STOP_REASON_CSA);
511 }
512 ch_switch.channel = new_ch;
513 ch_switch.count = sw_elem->count;
514 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
515 drv_channel_switch(sdata->local, &ch_switch);
516 return;
517 }
518
519 /* channel switch handled in software */
cc32abd4 520 if (sw_elem->count <= 1) {
42935eca 521 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 522 } else {
9feaddc7
WYG		 523 if (sw_elem->mode)
524 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 525 IEEE80211_QUEUE_STOP_REASON_CSA);
526 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
527 mod_timer(&ifmgd->chswitch_timer,
528 jiffies +
529 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 530 cbss->beacon_interval));
cc32abd4
JB		 531 }
532}
533
534static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
535 u16 capab_info, u8 *pwr_constr_elem,
536 u8 pwr_constr_elem_len)
537{
538 struct ieee80211_conf *conf = &sdata->local->hw.conf;
539
540 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
541 return;
542
543 /* Power constraint IE length should be 1 octet */
544 if (pwr_constr_elem_len != 1)
545 return;
546
547 if ((*pwr_constr_elem <= conf->channel->max_power) &&
548 (*pwr_constr_elem != sdata->local->power_constr_level)) {
549 sdata->local->power_constr_level = *pwr_constr_elem;
550 ieee80211_hw_config(sdata->local, 0);
551 }
552}
553
f90754c1
JO		 554void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
555{
556 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
557 struct ieee80211_local *local = sdata->local;
558 struct ieee80211_conf *conf = &local->hw.conf;
559
560 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
561 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
562 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
563
564 local->disable_dynamic_ps = false;
565 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
566}
567EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
568
569void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
570{
571 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
572 struct ieee80211_local *local = sdata->local;
573 struct ieee80211_conf *conf = &local->hw.conf;
574
575 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
576 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
577 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
578
579 local->disable_dynamic_ps = true;
580 conf->dynamic_ps_timeout = 0;
581 del_timer_sync(&local->dynamic_ps_timer);
582 ieee80211_queue_work(&local->hw,
583 &local->dynamic_ps_enable_work);
584}
585EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
586
965bedad
JB		 587/* powersave */
588static void ieee80211_enable_ps(struct ieee80211_local *local,
589 struct ieee80211_sub_if_data *sdata)
590{
591 struct ieee80211_conf *conf = &local->hw.conf;
592
d5edaedc
JB		 593 /*
594 * If we are scanning right now then the parameters will
595 * take effect when scan finishes.
596 */
fbe9c429 597 if (local->scanning)
d5edaedc
JB		 598 return;
599
965bedad
JB		 600 if (conf->dynamic_ps_timeout > 0 &&
601 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
602 mod_timer(&local->dynamic_ps_timer, jiffies +
603 msecs_to_jiffies(conf->dynamic_ps_timeout));
604 } else {
605 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
606 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 607
2a13052f
JO		 608 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
609 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
610 return;
611
612 conf->flags |= IEEE80211_CONF_PS;
613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 614 }
615}
616
617static void ieee80211_change_ps(struct ieee80211_local *local)
618{
619 struct ieee80211_conf *conf = &local->hw.conf;
620
621 if (local->ps_sdata) {
965bedad
JB		 622 ieee80211_enable_ps(local, local->ps_sdata);
623 } else if (conf->flags & IEEE80211_CONF_PS) {
624 conf->flags &= ~IEEE80211_CONF_PS;
625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
626 del_timer_sync(&local->dynamic_ps_timer);
627 cancel_work_sync(&local->dynamic_ps_enable_work);
628 }
629}
630
808118cb
JY		 631static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
632{
633 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
634 struct sta_info *sta = NULL;
c2c98fde 635 bool authorized = false;
808118cb
JY		 636
637 if (!mgd->powersave)
638 return false;
639
05cb9108
JB		 640 if (mgd->broken_ap)
641 return false;
642
808118cb
JY		 643 if (!mgd->associated)
644 return false;
645
646 if (!mgd->associated->beacon_ies)
647 return false;
648
649 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
650 IEEE80211_STA_CONNECTION_POLL))
651 return false;
652
653 rcu_read_lock();
654 sta = sta_info_get(sdata, mgd->bssid);
655 if (sta)
c2c98fde 656 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 657 rcu_read_unlock();
658
c2c98fde 659 return authorized;
808118cb
JY		 660}
661
965bedad 662/* need to hold RTNL or interface lock */
10f644a4 663void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 664{
665 struct ieee80211_sub_if_data *sdata, *found = NULL;
666 int count = 0;
195e294d 667 int timeout;
965bedad
JB		 668
669 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
670 local->ps_sdata = NULL;
671 return;
672 }
673
af6b6374
JB		 674 if (!list_empty(&local->work_list)) {
675 local->ps_sdata = NULL;
676 goto change;
677 }
678
965bedad 679 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 680 if (!ieee80211_sdata_running(sdata))
965bedad 681 continue;
8c7914de
RM		 682 if (sdata->vif.type == NL80211_IFTYPE_AP) {
683 /* If an AP vif is found, then disable PS
684 * by setting the count to zero thereby setting
685 * ps_sdata to NULL.
686 */
687 count = 0;
688 break;
689 }
965bedad
JB		 690 if (sdata->vif.type != NL80211_IFTYPE_STATION)
691 continue;
692 found = sdata;
693 count++;
694 }
695
808118cb 696 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 697 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 698 s32 beaconint_us;
699
700 if (latency < 0)
ed77134b 701 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 702
703 beaconint_us = ieee80211_tu_to_usec(
704 found->vif.bss_conf.beacon_int);
705
ff616381 706 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 707 if (timeout < 0) {
708 /*
ff616381
JO		 709 * Go to full PSM if the user configures a very low
710 * latency requirement.
0ab82b04
EP		 711 * The 2000 second value is there for compatibility
712 * until the PM_QOS_NETWORK_LATENCY is configured
713 * with real values.
195e294d 714 */
0ab82b04
EP		 715 if (latency > (1900 * USEC_PER_MSEC) &&
716 latency != (2000 * USEC_PER_SEC))
195e294d 717 timeout = 0;
ff616381
JO		 718 else
719 timeout = 100;
195e294d 720 }
f90754c1
JO		 721 local->dynamic_ps_user_timeout = timeout;
722 if (!local->disable_dynamic_ps)
723 conf->dynamic_ps_timeout =
724 local->dynamic_ps_user_timeout;
195e294d 725
04fe2037 726 if (beaconint_us > latency) {
10f644a4 727 local->ps_sdata = NULL;
04fe2037 728 } else {
56007a02 729 struct ieee80211_bss *bss;
04fe2037 730 int maxslp = 1;
56007a02 731 u8 dtimper;
04fe2037 732
56007a02
JB		 733 bss = (void *)found->u.mgd.associated->priv;
734 dtimper = bss->dtim_period;
735
736 /* If the TIM IE is invalid, pretend the value is 1 */
737 if (!dtimper)
738 dtimper = 1;
739 else if (dtimper > 1)
04fe2037
JB		 740 maxslp = min_t(int, dtimper,
741 latency / beaconint_us);
742
9ccebe61 743 local->hw.conf.max_sleep_period = maxslp;
56007a02 744 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 745 local->ps_sdata = found;
04fe2037 746 }
10f644a4 747 } else {
965bedad 748 local->ps_sdata = NULL;
10f644a4 749 }
965bedad 750
af6b6374 751 change:
965bedad
JB		 752 ieee80211_change_ps(local);
753}
754
755void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
756{
757 struct ieee80211_local *local =
758 container_of(work, struct ieee80211_local,
759 dynamic_ps_disable_work);
760
761 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
762 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
763 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
764 }
765
766 ieee80211_wake_queues_by_reason(&local->hw,
767 IEEE80211_QUEUE_STOP_REASON_PS);
768}
769
770void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
771{
772 struct ieee80211_local *local =
773 container_of(work, struct ieee80211_local,
774 dynamic_ps_enable_work);
775 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 776 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 777 unsigned long flags;
778 int q;
965bedad
JB		 779
780 /* can only happen when PS was just disabled anyway */
781 if (!sdata)
782 return;
783
5e34069c
CL		 784 ifmgd = &sdata->u.mgd;
785
965bedad
JB		 786 if (local->hw.conf.flags & IEEE80211_CONF_PS)
787 return;
788
77b7023a
AN		 789 if (!local->disable_dynamic_ps &&
790 local->hw.conf.dynamic_ps_timeout > 0) {
791 /* don't enter PS if TX frames are pending */
792 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 793 mod_timer(&local->dynamic_ps_timer, jiffies +
794 msecs_to_jiffies(
795 local->hw.conf.dynamic_ps_timeout));
796 return;
797 }
77b7023a
AN		 798
799 /*
800 * transmission can be stopped by others which leads to
801 * dynamic_ps_timer expiry. Postpone the ps timer if it
802 * is not the actual idle state.
803 */
804 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
805 for (q = 0; q < local->hw.queues; q++) {
806 if (local->queue_stop_reasons[q]) {
807 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
808 flags);
809 mod_timer(&local->dynamic_ps_timer, jiffies +
810 msecs_to_jiffies(
811 local->hw.conf.dynamic_ps_timeout));
812 return;
813 }
814 }
815 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 816 }
1ddc2867 817
375177bf 818 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
f3e85b9e
VN		 819 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
820 netif_tx_stop_all_queues(sdata->dev);
965bedad 821
e8306f98
VN		 822 if (drv_tx_frames_pending(local))
823 mod_timer(&local->dynamic_ps_timer, jiffies +
824 msecs_to_jiffies(
825 local->hw.conf.dynamic_ps_timeout));
826 else {
827 ieee80211_send_nullfunc(local, sdata, 1);
828 /* Flush to get the tx status of nullfunc frame */
829 drv_flush(local, false);
830 }
f3e85b9e
VN		 831 }
832
2a13052f
JO		 833 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
834 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 835 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
836 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
837 local->hw.conf.flags |= IEEE80211_CONF_PS;
838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
839 }
f3e85b9e 840
77b7023a
AN		 841 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
842 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 843}
844
845void ieee80211_dynamic_ps_timer(unsigned long data)
846{
847 struct ieee80211_local *local = (void *) data;
848
78f1a8b7 849 if (local->quiescing || local->suspended)
5bb644a0
JB		 850 return;
851
42935eca 852 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 853}
854
60f8b39c 855/* MLME */
f698d856 856static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 857 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 858 u8 *wmm_param, size_t wmm_param_len)
859{
f0706e82 860 struct ieee80211_tx_queue_params params;
4ced3f74 861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 862 size_t left;
863 int count;
ab13315a 864 u8 *pos, uapsd_queues = 0;
f0706e82 865
e1b3ec1a
SG		 866 if (!local->ops->conf_tx)
867 return;
868
af6b6374 869 if (local->hw.queues < 4)
3434fbd3
JB		 870 return;
871
872 if (!wmm_param)
873 return;
874
f0706e82
JB		 875 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
876 return;
ab13315a
KV		 877
878 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
50ae0cf1 879 uapsd_queues = local->uapsd_queues;
ab13315a 880
f0706e82 881 count = wmm_param[6] & 0x0f;
46900298 882 if (count == ifmgd->wmm_last_param_set)
f0706e82 883 return;
46900298 884 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 885
886 pos = wmm_param + 8;
887 left = wmm_param_len - 8;
888
889 memset(&params, 0, sizeof(params));
890
f0706e82
JB		 891 local->wmm_acm = 0;
892 for (; left >= 4; left -= 4, pos += 4) {
893 int aci = (pos[0] >> 5) & 0x03;
894 int acm = (pos[0] >> 4) & 0x01;
ab13315a 895 bool uapsd = false;
f0706e82
JB		 896 int queue;
897
898 switch (aci) {
0eeb59fe 899 case 1: /* AC_BK */
e100bb64 900 queue = 3;
988c0f72 901 if (acm)
0eeb59fe 902 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 903 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
904 uapsd = true;
f0706e82 905 break;
0eeb59fe 906 case 2: /* AC_VI */
e100bb64 907 queue = 1;
988c0f72 908 if (acm)
0eeb59fe 909 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 910 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
911 uapsd = true;
f0706e82 912 break;
0eeb59fe 913 case 3: /* AC_VO */
e100bb64 914 queue = 0;
988c0f72 915 if (acm)
0eeb59fe 916 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 917 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
918 uapsd = true;
f0706e82 919 break;
0eeb59fe 920 case 0: /* AC_BE */
f0706e82 921 default:
e100bb64 922 queue = 2;
988c0f72 923 if (acm)
0eeb59fe 924 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 925 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
926 uapsd = true;
f0706e82
JB		 927 break;
928 }
929
930 params.aifs = pos[0] & 0x0f;
931 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
932 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 933 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 934 params.uapsd = uapsd;
935
f4ea83dd 936#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 937 wiphy_debug(local->hw.wiphy,
938 "WMM queue=%d aci=%d acm=%d aifs=%d "
939 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
940 queue, aci, acm,
941 params.aifs, params.cw_min, params.cw_max,
942 params.txop, params.uapsd);
3330d7be 943#endif
f6f3def3
EP		 944 sdata->tx_conf[queue] = params;
945 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 946 wiphy_debug(local->hw.wiphy,
947 "failed to set TX queue parameters for queue %d\n",
948 queue);
f0706e82 949 }
e1b3ec1a
SG		 950
951 /* enable WMM or activate new settings */
4ced3f74
JB		 952 sdata->vif.bss_conf.qos = true;
953 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
f0706e82
JB		 954}
955
7a5158ef
JB		 956static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
957 u16 capab, bool erp_valid, u8 erp)
5628221c 958{
bda3933a 959 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 960 u32 changed = 0;
7a5158ef
JB		 961 bool use_protection;
962 bool use_short_preamble;
963 bool use_short_slot;
964
965 if (erp_valid) {
966 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
967 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
968 } else {
969 use_protection = false;
970 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
971 }
972
973 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 974 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
975 use_short_slot = true;
5628221c 976
471b3efd 977 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 978 bss_conf->use_cts_prot = use_protection;
979 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 980 }
7e9ed188 981
d43c7b37 982 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 983 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 984 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 985 }
d9430a32 986
7a5158ef 987 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 988 bss_conf->use_short_slot = use_short_slot;
989 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 990 }
991
992 return changed;
993}
994
f698d856 995static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 996 struct cfg80211_bss *cbss,
ae5eb026 997 u32 bss_info_changed)
f0706e82 998{
0c1ad2ca 999 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1000 struct ieee80211_local *local = sdata->local;
68542962 1001 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1002
ae5eb026 1003 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1004 /* set timing information */
68542962
JO		 1005 bss_conf->beacon_int = cbss->beacon_interval;
1006 bss_conf->timestamp = cbss->tsf;
5628221c 1007
77fdaa12
JB		 1008 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1009 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
0c1ad2ca 1010 cbss->capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1011
7ccc8bd7
FF		 1012 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1013 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1014
0c1ad2ca
JB		 1015 sdata->u.mgd.associated = cbss;
1016 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1017
17e4ec14
JM		 1018 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1019
b291ba11
JB		 1020 /* just to be sure */
1021 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1022 IEEE80211_STA_BEACON_POLL);
1023
9ac19a90 1024 ieee80211_led_assoc(local, 1);
9306102e 1025
e5b900d2
JB		 1026 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1027 bss_conf->dtim_period = bss->dtim_period;
1028 else
1029 bss_conf->dtim_period = 0;
1030
68542962 1031 bss_conf->assoc = 1;
96dd22ac
JB		 1032 /*
1033 * For now just always ask the driver to update the basic rateset
1034 * when we have associated, we aren't checking whether it actually
1035 * changed or not.
1036 */
ae5eb026 1037 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 1038
1039 /* And the BSSID changed - we're associated now */
1040 bss_info_changed |= BSS_CHANGED_BSSID;
1041
a97c13c3
JO		 1042 /* Tell the driver to monitor connection quality (if supported) */
1043 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
68542962 1044 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1045 bss_info_changed |= BSS_CHANGED_CQM;
1046
68542962
JO		 1047 /* Enable ARP filtering */
1048 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1049 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1050 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1051 }
1052
ae5eb026 1053 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1054
056508dc
JB		 1055 mutex_lock(&local->iflist_mtx);
1056 ieee80211_recalc_ps(local, -1);
025e6be2 1057 ieee80211_recalc_smps(local);
056508dc 1058 mutex_unlock(&local->iflist_mtx);
e0cb686f 1059
8a5b33f5 1060 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1061 netif_carrier_on(sdata->dev);
f0706e82
JB		 1062}
1063
e69e95db 1064static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
53f73c09 1065 bool remove_sta, bool tx)
aa458d17 1066{
46900298 1067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1068 struct ieee80211_local *local = sdata->local;
1069 struct sta_info *sta;
e0cb686f 1070 u32 changed = 0, config_changed = 0;
b291ba11 1071 u8 bssid[ETH_ALEN];
aa458d17 1072
77fdaa12
JB		 1073 ASSERT_MGD_MTX(ifmgd);
1074
b291ba11
JB		 1075 if (WARN_ON(!ifmgd->associated))
1076 return;
1077
0c1ad2ca 1078 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1079
77fdaa12
JB		 1080 ifmgd->associated = NULL;
1081 memset(ifmgd->bssid, 0, ETH_ALEN);
1082
1083 /*
1084 * we need to commit the associated = NULL change because the
1085 * scan code uses that to determine whether this iface should
1086 * go to/wake up from powersave or not -- and could otherwise
1087 * wake the queues erroneously.
1088 */
1089 smp_mb();
1090
1091 /*
1092 * Thus, we can only afterwards stop the queues -- to account
1093 * for the case where another CPU is finishing a scan at this
1094 * time -- we don't want the scan code to enable queues.
1095 */
aa458d17 1096
8a5b33f5 1097 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1098 netif_carrier_off(sdata->dev);
1099
2a419056 1100 mutex_lock(&local->sta_mtx);
abe60632 1101 sta = sta_info_get(sdata, bssid);
4cad6c7c 1102 if (sta) {
c2c98fde 1103 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1104 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1105 }
2a419056 1106 mutex_unlock(&local->sta_mtx);
aa458d17 1107
f5e5bf25
TW		 1108 changed |= ieee80211_reset_erp_info(sdata);
1109
f5e5bf25 1110 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1111 changed |= BSS_CHANGED_ASSOC;
1112 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1113
aa837e1d
JB		 1114 ieee80211_set_wmm_default(sdata);
1115
4797938c 1116 /* channel(_type) changes are handled by ieee80211_hw_config */
0aaffa9b 1117 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
e0cb686f 1118
413ad50a
JB		 1119 /* on the next assoc, re-program HT parameters */
1120 sdata->ht_opmode_valid = false;
1121
a8302de9
VT		 1122 local->power_constr_level = 0;
1123
520eb820
KV		 1124 del_timer_sync(&local->dynamic_ps_timer);
1125 cancel_work_sync(&local->dynamic_ps_enable_work);
1126
e0cb686f
KV		 1127 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1128 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1129 config_changed |= IEEE80211_CONF_CHANGE_PS;
1130 }
a331400b 1131 local->ps_sdata = NULL;
ae5eb026 1132
e0cb686f 1133 ieee80211_hw_config(local, config_changed);
9cef8737 1134
68542962
JO		 1135 /* Disable ARP filtering */
1136 if (sdata->vif.bss_conf.arp_filter_enabled) {
1137 sdata->vif.bss_conf.arp_filter_enabled = false;
1138 changed |= BSS_CHANGED_ARP_FILTER;
1139 }
1140
0aaffa9b
JB		 1141 /* The BSSID (not really interesting) and HT changed */
1142 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1143 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1144
07ba55d7 1145 /* remove AP and TDLS peers */
e69e95db 1146 if (remove_sta)
07ba55d7 1147 sta_info_flush(local, sdata);
b9dcf712
JB		 1148
1149 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1150 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1151 del_timer_sync(&sdata->u.mgd.timer);
1152 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1153}
f0706e82 1154
3cf335d5
KV		 1155void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1156 struct ieee80211_hdr *hdr)
1157{
1158 /*
1159 * We can postpone the mgd.timer whenever receiving unicast frames
1160 * from AP because we know that the connection is working both ways
1161 * at that time. But multicast frames (and hence also beacons) must
1162 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1163 * data idle periods for sending the periodic probe request to the
1164 * AP we're connected to.
3cf335d5 1165 */
b291ba11
JB		 1166 if (is_multicast_ether_addr(hdr->addr1))
1167 return;
1168
be099e82 1169 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1170}
f0706e82 1171
4e5ff376
FF		 1172static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1173{
1174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1175
1176 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1177 IEEE80211_STA_CONNECTION_POLL)))
1178 return;
1179
1180 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1181 IEEE80211_STA_BEACON_POLL);
1182 mutex_lock(&sdata->local->iflist_mtx);
1183 ieee80211_recalc_ps(sdata->local, -1);
1184 mutex_unlock(&sdata->local->iflist_mtx);
1185
1186 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1187 return;
1188
1189 /*
1190 * We've received a probe response, but are not sure whether
1191 * we have or will be receiving any beacons or data, so let's
1192 * schedule the timers again, just in case.
1193 */
1194 ieee80211_sta_reset_beacon_monitor(sdata);
1195
1196 mod_timer(&ifmgd->conn_mon_timer,
1197 round_jiffies_up(jiffies +
1198 IEEE80211_CONNECTION_IDLE_TIME));
1199}
1200
1201void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1202 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1203{
75706d0e 1204 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1205 return;
1206
04ac3c0e
FF		 1207 if (ack)
1208 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1209
1210 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1211 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1212 if (ack)
1213 sdata->u.mgd.probe_send_count = 0;
1214 else
1215 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1216 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1217 }
1218}
1219
a43abf29
ML		 1220static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1221{
1222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1223 const u8 *ssid;
f01a067d 1224 u8 *dst = ifmgd->associated->bssid;
180205bd 1225 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1226
1227 /*
1228 * Try sending broadcast probe requests for the last three
1229 * probe requests after the first ones failed since some
1230 * buggy APs only support broadcast probe requests.
1231 */
1232 if (ifmgd->probe_send_count >= unicast_limit)
1233 dst = NULL;
a43abf29 1234
4e5ff376
FF		 1235 /*
1236 * When the hardware reports an accurate Tx ACK status, it's
1237 * better to send a nullfunc frame instead of a probe request,
1238 * as it will kick us off the AP quickly if we aren't associated
1239 * anymore. The timeout will be reset if the frame is ACKed by
1240 * the AP.
1241 */
04ac3c0e
FF		 1242 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1243 ifmgd->nullfunc_failed = false;
4e5ff376 1244 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1245 } else {
4e5ff376 1246 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
a806c558 1247 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
aad14ceb 1248 (u32) -1, true, false);
4e5ff376 1249 }
a43abf29
ML		 1250
1251 ifmgd->probe_send_count++;
180205bd 1252 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29
ML		 1253 run_again(ifmgd, ifmgd->probe_timeout);
1254}
1255
b291ba11
JB		 1256static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1257 bool beacon)
04de8381 1258{
04de8381 1259 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1260 bool already = false;
34bfc411 1261
9607e6b6 1262 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1263 return;
1264
91a3bd76
LR		 1265 if (sdata->local->scanning)
1266 return;
1267
b8bc4b0a
JB		 1268 if (sdata->local->tmp_channel)
1269 return;
1270
77fdaa12
JB		 1271 mutex_lock(&ifmgd->mtx);
1272
1273 if (!ifmgd->associated)
1274 goto out;
1275
a860402d 1276#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1277 if (beacon && net_ratelimit())
1278 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1279 "- sending probe request\n", sdata->name);
a860402d 1280#endif
04de8381 1281
b291ba11
JB		 1282 /*
1283 * The driver/our work has already reported this event or the
1284 * connection monitoring has kicked in and we have already sent
1285 * a probe request. Or maybe the AP died and the driver keeps
1286 * reporting until we disassociate...
1287 *
1288 * In either case we have to ignore the current call to this
1289 * function (except for setting the correct probe reason bit)
1290 * because otherwise we would reset the timer every time and
1291 * never check whether we received a probe response!
1292 */
1293 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1294 IEEE80211_STA_CONNECTION_POLL))
1295 already = true;
1296
1297 if (beacon)
1298 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1299 else
1300 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1301
1302 if (already)
1303 goto out;
1304
4e751843
JB		 1305 mutex_lock(&sdata->local->iflist_mtx);
1306 ieee80211_recalc_ps(sdata->local, -1);
1307 mutex_unlock(&sdata->local->iflist_mtx);
1308
a43abf29
ML		 1309 ifmgd->probe_send_count = 0;
1310 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1311 out:
1312 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1313}
1314
a619a4c0
JO		 1315struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1316 struct ieee80211_vif *vif)
1317{
1318 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1320 struct sk_buff *skb;
1321 const u8 *ssid;
1322
1323 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1324 return NULL;
1325
1326 ASSERT_MGD_MTX(ifmgd);
1327
1328 if (!ifmgd->associated)
1329 return NULL;
1330
1331 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1332 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
85a237fe
JB		 1333 (u32) -1, ssid + 2, ssid[1],
1334 NULL, 0, true);
a619a4c0
JO		 1335
1336 return skb;
1337}
1338EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1339
1e4dcd01
JO		 1340static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1341{
1342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1343 struct ieee80211_local *local = sdata->local;
1344 u8 bssid[ETH_ALEN];
1345
1346 mutex_lock(&ifmgd->mtx);
1347 if (!ifmgd->associated) {
1348 mutex_unlock(&ifmgd->mtx);
1349 return;
1350 }
1351
1352 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1353
180205bd
BG		 1354 printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n",
1355 sdata->name, bssid);
1e4dcd01 1356
53f73c09 1357 ieee80211_set_disassoc(sdata, true, true);
1e4dcd01 1358 mutex_unlock(&ifmgd->mtx);
7da7cc1d
JB		 1359
1360 mutex_lock(&local->mtx);
1361 ieee80211_recalc_idle(local);
1362 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1363 /*
1364 * must be outside lock due to cfg80211,
1365 * but that's not a problem.
1366 */
1367 ieee80211_send_deauth_disassoc(sdata, bssid,
1368 IEEE80211_STYPE_DEAUTH,
1369 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
d5cdfacb 1370 NULL, true);
1e4dcd01
JO		 1371}
1372
1373void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1374{
1375 struct ieee80211_sub_if_data *sdata =
1376 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1377 u.mgd.beacon_connection_loss_work);
b291ba11 1378
1e4dcd01
JO		 1379 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1380 __ieee80211_connection_loss(sdata);
1381 else
1382 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1383}
1384
04de8381
KV		 1385void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1386{
1387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1388 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1389
b5878a2d
JB		 1390 trace_api_beacon_loss(sdata);
1391
1e4dcd01
JO		 1392 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1393 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1394}
1395EXPORT_SYMBOL(ieee80211_beacon_loss);
1396
1e4dcd01
JO		 1397void ieee80211_connection_loss(struct ieee80211_vif *vif)
1398{
1399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1400 struct ieee80211_hw *hw = &sdata->local->hw;
1401
b5878a2d
JB		 1402 trace_api_connection_loss(sdata);
1403
1e4dcd01
JO		 1404 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1405 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1406}
1407EXPORT_SYMBOL(ieee80211_connection_loss);
1408
1409
77fdaa12
JB		 1410static enum rx_mgmt_action __must_check
1411ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1412 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1413{
46900298 1414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1415 const u8 *bssid = NULL;
f0706e82
JB		 1416 u16 reason_code;
1417
f4ea83dd 1418 if (len < 24 + 2)
77fdaa12 1419 return RX_MGMT_NONE;
f0706e82 1420
77fdaa12
JB		 1421 ASSERT_MGD_MTX(ifmgd);
1422
0c1ad2ca 1423 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1424
1425 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1426
77fdaa12 1427 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1428 sdata->name, bssid, reason_code);
77fdaa12 1429
53f73c09 1430 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1431 mutex_lock(&sdata->local->mtx);
63f170e0 1432 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1433 mutex_unlock(&sdata->local->mtx);
f0706e82 1434
77fdaa12 1435 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1436}
1437
1438
77fdaa12
JB		 1439static enum rx_mgmt_action __must_check
1440ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1441 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1442{
46900298 1443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1444 u16 reason_code;
1445
f4ea83dd 1446 if (len < 24 + 2)
77fdaa12 1447 return RX_MGMT_NONE;
f0706e82 1448
77fdaa12
JB		 1449 ASSERT_MGD_MTX(ifmgd);
1450
1451 if (WARN_ON(!ifmgd->associated))
1452 return RX_MGMT_NONE;
1453
0c1ad2ca 1454 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
77fdaa12 1455 return RX_MGMT_NONE;
f0706e82
JB		 1456
1457 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1458
0ff71613 1459 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1460 sdata->name, mgmt->sa, reason_code);
f0706e82 1461
53f73c09 1462 ieee80211_set_disassoc(sdata, true, false);
7da7cc1d 1463 mutex_lock(&sdata->local->mtx);
bc83b681 1464 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1465 mutex_unlock(&sdata->local->mtx);
77fdaa12 1466 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1467}
1468
c74d084f
CL		 1469static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1470 u8 *supp_rates, unsigned int supp_rates_len,
1471 u32 *rates, u32 *basic_rates,
1472 bool *have_higher_than_11mbit,
1473 int *min_rate, int *min_rate_index)
1474{
1475 int i, j;
1476
1477 for (i = 0; i < supp_rates_len; i++) {
1478 int rate = (supp_rates[i] & 0x7f) * 5;
1479 bool is_basic = !!(supp_rates[i] & 0x80);
1480
1481 if (rate > 110)
1482 *have_higher_than_11mbit = true;
1483
1484 /*
1485 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1486 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1487 *
1488 * Note: Even through the membership selector and the basic
1489 * rate flag share the same bit, they are not exactly
1490 * the same.
1491 */
1492 if (!!(supp_rates[i] & 0x80) &&
1493 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1494 continue;
1495
1496 for (j = 0; j < sband->n_bitrates; j++) {
1497 if (sband->bitrates[j].bitrate == rate) {
1498 *rates |= BIT(j);
1499 if (is_basic)
1500 *basic_rates |= BIT(j);
1501 if (rate < *min_rate) {
1502 *min_rate = rate;
1503 *min_rate_index = j;
1504 }
1505 break;
1506 }
1507 }
1508 }
1509}
f0706e82 1510
af6b6374
JB		 1511static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1512 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1513{
af6b6374 1514 struct ieee80211_sub_if_data *sdata = wk->sdata;
46900298 1515 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1516 struct ieee80211_local *local = sdata->local;
8318d78a 1517 struct ieee80211_supported_band *sband;
f0706e82 1518 struct sta_info *sta;
0c1ad2ca 1519 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374 1520 u8 *pos;
881d948c 1521 u32 rates, basic_rates;
af6b6374 1522 u16 capab_info, aid;
f0706e82 1523 struct ieee802_11_elems elems;
bda3933a 1524 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1525 u32 changed = 0;
c74d084f 1526 int err;
5d1ec85f 1527 bool have_higher_than_11mbit = false;
ae5eb026 1528 u16 ap_ht_cap_flags;
3432f923 1529 int min_rate = INT_MAX, min_rate_index = -1;
f0706e82 1530
af6b6374 1531 /* AssocResp and ReassocResp have identical structure */
f0706e82 1532
f0706e82 1533 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1534 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1535
1dd84aa2 1536 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
05cb9108
JB		 1537 printk(KERN_DEBUG
1538 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1539 sdata->name, aid);
1dd84aa2
JB		 1540 aid &= ~(BIT(15) | BIT(14));
1541
05cb9108
JB		 1542 ifmgd->broken_ap = false;
1543
1544 if (aid == 0 || aid > IEEE80211_MAX_AID) {
1545 printk(KERN_DEBUG
1546 "%s: invalid AID value %d (out of range), turn off PS\n",
1547 sdata->name, aid);
1548 aid = 0;
1549 ifmgd->broken_ap = true;
1550 }
1551
af6b6374
JB		 1552 pos = mgmt->u.assoc_resp.variable;
1553 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1554
f0706e82
JB		 1555 if (!elems.supp_rates) {
1556 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1557 sdata->name);
af6b6374 1558 return false;
f0706e82
JB		 1559 }
1560
46900298 1561 ifmgd->aid = aid;
f0706e82 1562
2a33bee2
GE		 1563 mutex_lock(&sdata->local->sta_mtx);
1564 /*
1565 * station info was already allocated and inserted before
1566 * the association and should be available to us
1567 */
1568 sta = sta_info_get_rx(sdata, cbss->bssid);
1569 if (WARN_ON(!sta)) {
1570 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 1571 return false;
77fdaa12 1572 }
05e5e883 1573
c2c98fde
JB		 1574 set_sta_flag(sta, WLAN_STA_AUTH);
1575 set_sta_flag(sta, WLAN_STA_ASSOC);
1576 set_sta_flag(sta, WLAN_STA_ASSOC_AP);
5d1ec85f 1577 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
c2c98fde 1578 set_sta_flag(sta, WLAN_STA_AUTHORIZED);
5d1ec85f 1579
60f8b39c
JB		 1580 rates = 0;
1581 basic_rates = 0;
e7480bbb 1582 sband = local->hw.wiphy->bands[wk->chan->band];
f709fc69 1583
c74d084f
CL		 1584 ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len,
1585 &rates, &basic_rates, &have_higher_than_11mbit,
1586 &min_rate, &min_rate_index);
f0706e82 1587
c74d084f
CL		 1588 ieee80211_get_rates(sband, elems.ext_supp_rates,
1589 elems.ext_supp_rates_len, &rates, &basic_rates,
1590 &have_higher_than_11mbit,
1591 &min_rate, &min_rate_index);
f0706e82 1592
3432f923
EP		 1593 /*
1594 * some buggy APs don't advertise basic_rates. use the lowest
1595 * supported rate instead.
1596 */
1597 if (unlikely(!basic_rates) && min_rate_index >= 0) {
1598 printk(KERN_DEBUG "%s: No basic rates in AssocResp. "
1599 "Using min supported rate instead.\n", sdata->name);
1600 basic_rates = BIT(min_rate_index);
1601 }
1602
e7480bbb 1603 sta->sta.supp_rates[wk->chan->band] = rates;
bda3933a 1604 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1605
1606 /* cf. IEEE 802.11 9.2.12 */
e7480bbb 1607 if (wk->chan->band == IEEE80211_BAND_2GHZ &&
60f8b39c
JB		 1608 have_higher_than_11mbit)
1609 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1610 else
1611 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1612
ab1faead 1613 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1614 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1615 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1616
1617 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1618
4b7679a5 1619 rate_control_rate_init(sta);
f0706e82 1620
46900298 1621 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 1622 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 1623
ddf4ac53 1624 if (elems.wmm_param)
c2c98fde 1625 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 1626
2a33bee2
GE		 1627 /* sta_info_reinsert will also unlock the mutex lock */
1628 err = sta_info_reinsert(sta);
5d1ec85f
JB		 1629 sta = NULL;
1630 if (err) {
1631 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1632 " the AP (error %d)\n", sdata->name, err);
90be561b 1633 return false;
ddf4ac53
JB		 1634 }
1635
f2176d72
JO		 1636 /*
1637 * Always handle WMM once after association regardless
1638 * of the first value the AP uses. Setting -1 here has
1639 * that effect because the AP values is an unsigned
1640 * 4-bit value.
1641 */
1642 ifmgd->wmm_last_param_set = -1;
1643
ddf4ac53 1644 if (elems.wmm_param)
4ced3f74 1645 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 1646 elems.wmm_param_len);
aa837e1d
JB		 1647 else
1648 ieee80211_set_wmm_default(sdata);
f0706e82 1649
e4da8c37
JB		 1650 local->oper_channel = wk->chan;
1651
ae5eb026 1652 if (elems.ht_info_elem && elems.wmm_param &&
af6b6374 1653 (sdata->local->hw.queues >= 4) &&
ab1faead 1654 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1655 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4
RM		 1656 cbss->bssid, ap_ht_cap_flags,
1657 false);
ae5eb026 1658
60f8b39c
JB		 1659 /* set AID and assoc capability,
1660 * ieee80211_set_associated() will tell the driver */
1661 bss_conf->aid = aid;
1662 bss_conf->assoc_capability = capab_info;
0c1ad2ca 1663 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 1664
d524215f
FF		 1665 /*
1666 * If we're using 4-addr mode, let the AP know that we're
1667 * doing so, so that it can create the STA VLAN on its side
1668 */
1669 if (ifmgd->use_4addr)
1670 ieee80211_send_4addr_nullfunc(local, sdata);
1671
15b7b062 1672 /*
b291ba11
JB		 1673 * Start timer to probe the connection to the AP now.
1674 * Also start the timer that will detect beacon loss.
15b7b062 1675 */
b291ba11 1676 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 1677 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 1678
af6b6374 1679 return true;
f0706e82
JB		 1680}
1681
1682
98c8fccf
JB		 1683static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1684 struct ieee80211_mgmt *mgmt,
1685 size_t len,
1686 struct ieee80211_rx_status *rx_status,
1687 struct ieee802_11_elems *elems,
1688 bool beacon)
1689{
1690 struct ieee80211_local *local = sdata->local;
1691 int freq;
c2b13452 1692 struct ieee80211_bss *bss;
98c8fccf 1693 struct ieee80211_channel *channel;
56007a02
JB		 1694 bool need_ps = false;
1695
1696 if (sdata->u.mgd.associated) {
1697 bss = (void *)sdata->u.mgd.associated->priv;
1698 /* not previously set so we may need to recalc */
1699 need_ps = !bss->dtim_period;
1700 }
98c8fccf
JB		 1701
1702 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 1703 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
1704 rx_status->band);
98c8fccf
JB		 1705 else
1706 freq = rx_status->freq;
1707
1708 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1709
1710 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1711 return;
1712
98c8fccf 1713 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1714 channel, beacon);
77fdaa12
JB		 1715 if (bss)
1716 ieee80211_rx_bss_put(local, bss);
1717
1718 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1719 return;
1720
56007a02
JB		 1721 if (need_ps) {
1722 mutex_lock(&local->iflist_mtx);
1723 ieee80211_recalc_ps(local, -1);
1724 mutex_unlock(&local->iflist_mtx);
1725 }
1726
c481ec97 1727 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 1728 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 1729 ETH_ALEN) == 0)) {
c481ec97
S		 1730 struct ieee80211_channel_sw_ie *sw_elem =
1731 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 1732 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1733 bss, rx_status->mactime);
c481ec97 1734 }
f0706e82
JB		 1735}
1736
1737
f698d856 1738static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 1739 struct sk_buff *skb)
f0706e82 1740{
af6b6374 1741 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 1742 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 1743 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1744 size_t baselen, len = skb->len;
ae6a44e3
EK		 1745 struct ieee802_11_elems elems;
1746
15b7b062
KV		 1747 ifmgd = &sdata->u.mgd;
1748
77fdaa12
JB		 1749 ASSERT_MGD_MTX(ifmgd);
1750
47846c9b 1751 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1752 return; /* ignore ProbeResp to foreign address */
1753
ae6a44e3
EK		 1754 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1755 if (baselen > len)
1756 return;
1757
1758 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1759 &elems);
1760
98c8fccf 1761 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 1762
77fdaa12 1763 if (ifmgd->associated &&
4e5ff376
FF		 1764 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
1765 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 1766}
1767
d91f36db
JB		 1768/*
1769 * This is the canonical list of information elements we care about,
1770 * the filter code also gives us all changes to the Microsoft OUI
1771 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1772 *
1773 * We implement beacon filtering in software since that means we can
1774 * avoid processing the frame here and in cfg80211, and userspace
1775 * will not be able to tell whether the hardware supports it or not.
1776 *
1777 * XXX: This list needs to be dynamic -- userspace needs to be able to
1778 * add items it requires. It also needs to be able to tell us to
1779 * look out for other vendor IEs.
1780 */
1781static const u64 care_about_ies =
1d4df3a5
JB		 1782 (1ULL << WLAN_EID_COUNTRY) |
1783 (1ULL << WLAN_EID_ERP_INFO) |
1784 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1785 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1786 (1ULL << WLAN_EID_HT_CAPABILITY) |
1787 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1788
f698d856 1789static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1790 struct ieee80211_mgmt *mgmt,
1791 size_t len,
1792 struct ieee80211_rx_status *rx_status)
1793{
d91f36db 1794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 1795 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 1796 size_t baselen;
1797 struct ieee802_11_elems elems;
f698d856 1798 struct ieee80211_local *local = sdata->local;
471b3efd 1799 u32 changed = 0;
d91f36db 1800 bool erp_valid, directed_tim = false;
7a5158ef 1801 u8 erp_value = 0;
d91f36db 1802 u32 ncrc;
77fdaa12
JB		 1803 u8 *bssid;
1804
1805 ASSERT_MGD_MTX(ifmgd);
f0706e82 1806
ae6a44e3
EK		 1807 /* Process beacon from the current BSS */
1808 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1809 if (baselen > len)
1810 return;
1811
d91f36db 1812 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1813 return;
f0706e82 1814
b291ba11
JB		 1815 /*
1816 * We might have received a number of frames, among them a
1817 * disassoc frame and a beacon...
1818 */
1819 if (!ifmgd->associated)
77fdaa12
JB		 1820 return;
1821
0c1ad2ca 1822 bssid = ifmgd->associated->bssid;
77fdaa12 1823
b291ba11
JB		 1824 /*
1825 * And in theory even frames from a different AP we were just
1826 * associated to a split-second ago!
1827 */
1828 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1829 return;
1830
17e4ec14
JM		 1831 /* Track average RSSI from the Beacon frames of the current AP */
1832 ifmgd->last_beacon_signal = rx_status->signal;
1833 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1834 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 1835 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 1836 ifmgd->last_cqm_event_signal = 0;
391a200a 1837 ifmgd->count_beacon_signal = 1;
615f7b9b 1838 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 1839 } else {
1840 ifmgd->ave_beacon_signal =
1841 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1842 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1843 ifmgd->ave_beacon_signal) / 16;
391a200a 1844 ifmgd->count_beacon_signal++;
17e4ec14 1845 }
615f7b9b
MV		 1846
1847 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
1848 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
1849 int sig = ifmgd->ave_beacon_signal;
1850 int last_sig = ifmgd->last_ave_beacon_signal;
1851
1852 /*
1853 * if signal crosses either of the boundaries, invoke callback
1854 * with appropriate parameters
1855 */
1856 if (sig > ifmgd->rssi_max_thold &&
1857 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
1858 ifmgd->last_ave_beacon_signal = sig;
1859 drv_rssi_callback(local, RSSI_EVENT_HIGH);
1860 } else if (sig < ifmgd->rssi_min_thold &&
1861 (last_sig >= ifmgd->rssi_max_thold ||
1862 last_sig == 0)) {
1863 ifmgd->last_ave_beacon_signal = sig;
1864 drv_rssi_callback(local, RSSI_EVENT_LOW);
1865 }
1866 }
1867
17e4ec14 1868 if (bss_conf->cqm_rssi_thold &&
391a200a 1869 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
17e4ec14
JM		 1870 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1871 int sig = ifmgd->ave_beacon_signal / 16;
1872 int last_event = ifmgd->last_cqm_event_signal;
1873 int thold = bss_conf->cqm_rssi_thold;
1874 int hyst = bss_conf->cqm_rssi_hyst;
1875 if (sig < thold &&
1876 (last_event == 0 || sig < last_event - hyst)) {
1877 ifmgd->last_cqm_event_signal = sig;
1878 ieee80211_cqm_rssi_notify(
1879 &sdata->vif,
1880 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1881 GFP_KERNEL);
1882 } else if (sig > thold &&
1883 (last_event == 0 || sig > last_event + hyst)) {
1884 ifmgd->last_cqm_event_signal = sig;
1885 ieee80211_cqm_rssi_notify(
1886 &sdata->vif,
1887 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1888 GFP_KERNEL);
1889 }
1890 }
1891
b291ba11 1892 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1893#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1894 if (net_ratelimit()) {
1895 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1896 "to a received beacon\n", sdata->name);
92778180
JM		 1897 }
1898#endif
b291ba11 1899 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1900 mutex_lock(&local->iflist_mtx);
1901 ieee80211_recalc_ps(local, -1);
1902 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1903 }
1904
b291ba11
JB		 1905 /*
1906 * Push the beacon loss detection into the future since
1907 * we are processing a beacon from the AP just now.
1908 */
d3a910a8 1909 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 1910
d91f36db
JB		 1911 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1912 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1913 len - baselen, &elems,
1914 care_about_ies, ncrc);
1915
1916 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1917 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1918 ifmgd->aid);
d91f36db 1919
d8ec4433 1920 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 1921 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1922 true);
d91f36db 1923
4ced3f74 1924 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 1925 elems.wmm_param_len);
1926 }
fe3fa827 1927
25c9c875 1928 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1929 if (directed_tim) {
572e0012
KV		 1930 if (local->hw.conf.dynamic_ps_timeout > 0) {
1931 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1932 ieee80211_hw_config(local,
1933 IEEE80211_CONF_CHANGE_PS);
1934 ieee80211_send_nullfunc(local, sdata, 0);
1935 } else {
1936 local->pspolling = true;
1937
1938 /*
1939 * Here is assumed that the driver will be
1940 * able to send ps-poll frame and receive a
1941 * response even though power save mode is
1942 * enabled, but some drivers might require
1943 * to disable power save here. This needs
1944 * to be investigated.
1945 */
1946 ieee80211_send_pspoll(local, sdata);
1947 }
a97b77b9
VN		 1948 }
1949 }
7a5158ef 1950
d8ec4433 1951 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 1952 return;
1953 ifmgd->beacon_crc = ncrc;
d8ec4433 1954 ifmgd->beacon_crc_valid = true;
30196673 1955
7a5158ef
JB		 1956 if (elems.erp_info && elems.erp_info_len >= 1) {
1957 erp_valid = true;
1958 erp_value = elems.erp_info[0];
1959 } else {
1960 erp_valid = false;
50c4afb9 1961 }
7a5158ef
JB		 1962 changed |= ieee80211_handle_bss_capability(sdata,
1963 le16_to_cpu(mgmt->u.beacon.capab_info),
1964 erp_valid, erp_value);
f0706e82 1965
d3c990fb 1966
53d6f81c 1967 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1968 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1969 struct sta_info *sta;
1970 struct ieee80211_supported_band *sband;
1971 u16 ap_ht_cap_flags;
1972
1973 rcu_read_lock();
1974
abe60632 1975 sta = sta_info_get(sdata, bssid);
77fdaa12 1976 if (WARN_ON(!sta)) {
ae5eb026
JB		 1977 rcu_read_unlock();
1978 return;
1979 }
1980
1981 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1982
1983 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1984 elems.ht_cap_elem, &sta->sta.ht_cap);
1985
1986 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1987
1988 rcu_read_unlock();
1989
1990 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
7cc44ed4 1991 bssid, ap_ht_cap_flags, true);
d3c990fb
RR		 1992 }
1993
8b19e6ca 1994 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1995 if (elems.country_elem) {
a8302de9
VT		 1996 /* TODO: IBSS also needs this */
1997 if (elems.pwr_constr_elem)
1998 ieee80211_handle_pwr_constr(sdata,
1999 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2000 elems.pwr_constr_elem,
2001 elems.pwr_constr_elem_len);
3f2355cb
LR		 2002 }
2003
471b3efd 2004 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2005}
2006
1fa57d01
JB		 2007void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2008 struct sk_buff *skb)
f0706e82 2009{
77fdaa12 2010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2011 struct ieee80211_rx_status *rx_status;
f0706e82 2012 struct ieee80211_mgmt *mgmt;
77fdaa12 2013 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2014 u16 fc;
2015
f0706e82
JB		 2016 rx_status = (struct ieee80211_rx_status *) skb->cb;
2017 mgmt = (struct ieee80211_mgmt *) skb->data;
2018 fc = le16_to_cpu(mgmt->frame_control);
2019
77fdaa12
JB		 2020 mutex_lock(&ifmgd->mtx);
2021
2022 if (ifmgd->associated &&
0c1ad2ca 2023 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
77fdaa12
JB		 2024 switch (fc & IEEE80211_FCTL_STYPE) {
2025 case IEEE80211_STYPE_BEACON:
2026 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2027 rx_status);
2028 break;
2029 case IEEE80211_STYPE_PROBE_RESP:
af6b6374 2030 ieee80211_rx_mgmt_probe_resp(sdata, skb);
77fdaa12
JB		 2031 break;
2032 case IEEE80211_STYPE_DEAUTH:
63f170e0 2033 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 2034 break;
2035 case IEEE80211_STYPE_DISASSOC:
2036 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2037 break;
2038 case IEEE80211_STYPE_ACTION:
8b9a4e6e 2039 switch (mgmt->u.action.category) {
8b9a4e6e
JB		 2040 case WLAN_CATEGORY_SPECTRUM_MGMT:
2041 ieee80211_sta_process_chanswitch(sdata,
2042 &mgmt->u.action.u.chan_switch.sw_elem,
2043 (void *)ifmgd->associated->priv,
2044 rx_status->mactime);
2045 break;
2046 }
77fdaa12
JB		 2047 }
2048 mutex_unlock(&ifmgd->mtx);
2049
2050 switch (rma) {
2051 case RX_MGMT_NONE:
2052 /* no action */
2053 break;
2054 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2055 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2056 break;
2057 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2058 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2059 break;
2060 default:
2061 WARN(1, "unexpected: %d", rma);
2062 }
36b3a628 2063 return;
77fdaa12
JB		 2064 }
2065
77fdaa12
JB		 2066 mutex_unlock(&ifmgd->mtx);
2067
63f170e0 2068 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
b054b747
JB		 2069 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2070 struct ieee80211_local *local = sdata->local;
2071 struct ieee80211_work *wk;
2072
a1699b75 2073 mutex_lock(&local->mtx);
b054b747
JB		 2074 list_for_each_entry(wk, &local->work_list, list) {
2075 if (wk->sdata != sdata)
2076 continue;
2077
e5b900d2
JB		 2078 if (wk->type != IEEE80211_WORK_ASSOC &&
2079 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
b054b747
JB		 2080 continue;
2081
2082 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
2083 continue;
2084 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
2085 continue;
2086
2087 /*
2088 * Printing the message only here means we can't
2089 * spuriously print it, but it also means that it
2090 * won't be printed when the frame comes in before
2091 * we even tried to associate or in similar cases.
2092 *
2093 * Ultimately, I suspect cfg80211 should print the
2094 * messages instead.
2095 */
2096 printk(KERN_DEBUG
2097 "%s: deauthenticated from %pM (Reason: %u)\n",
2098 sdata->name, mgmt->bssid,
2099 le16_to_cpu(mgmt->u.deauth.reason_code));
2100
2101 list_del_rcu(&wk->list);
2102 free_work(wk);
2103 break;
2104 }
a1699b75 2105 mutex_unlock(&local->mtx);
f0706e82 2106
ce470613 2107 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
b054b747 2108 }
f0706e82
JB		 2109}
2110
9c6bd790 2111static void ieee80211_sta_timer(unsigned long data)
f0706e82 2112{
60f8b39c
JB		 2113 struct ieee80211_sub_if_data *sdata =
2114 (struct ieee80211_sub_if_data *) data;
46900298 2115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2116 struct ieee80211_local *local = sdata->local;
f0706e82 2117
5bb644a0
JB		 2118 if (local->quiescing) {
2119 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2120 return;
2121 }
2122
64592c8f 2123 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2124}
2125
04ac3c0e 2126static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2127 u8 *bssid, u8 reason)
04ac3c0e
FF		 2128{
2129 struct ieee80211_local *local = sdata->local;
2130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2131
2132 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2133 IEEE80211_STA_BEACON_POLL);
2134
2135 ieee80211_set_disassoc(sdata, true, true);
2136 mutex_unlock(&ifmgd->mtx);
2137 mutex_lock(&local->mtx);
2138 ieee80211_recalc_idle(local);
2139 mutex_unlock(&local->mtx);
2140 /*
2141 * must be outside lock due to cfg80211,
2142 * but that's not a problem.
2143 */
2144 ieee80211_send_deauth_disassoc(sdata, bssid,
95acac61 2145 IEEE80211_STYPE_DEAUTH, reason,
04ac3c0e
FF		 2146 NULL, true);
2147 mutex_lock(&ifmgd->mtx);
2148}
2149
1fa57d01 2150void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2151{
9c6bd790 2152 struct ieee80211_local *local = sdata->local;
1fa57d01 2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2154
77fdaa12
JB		 2155 /* then process the rest of the work */
2156 mutex_lock(&ifmgd->mtx);
2157
b291ba11
JB		 2158 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2159 IEEE80211_STA_CONNECTION_POLL) &&
2160 ifmgd->associated) {
a43abf29 2161 u8 bssid[ETH_ALEN];
72a8a3ed 2162 int max_tries;
a43abf29 2163
0c1ad2ca 2164 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2165
72a8a3ed 2166 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2167 max_tries = max_nullfunc_tries;
72a8a3ed 2168 else
180205bd 2169 max_tries = max_probe_tries;
72a8a3ed 2170
4e5ff376
FF		 2171 /* ACK received for nullfunc probing frame */
2172 if (!ifmgd->probe_send_count)
2173 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2174 else if (ifmgd->nullfunc_failed) {
2175 if (ifmgd->probe_send_count < max_tries) {
2176#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2177 wiphy_debug(local->hw.wiphy,
2178 "%s: No ack for nullfunc frame to"
bfc31df3 2179 " AP %pM, try %d/%i\n",
04ac3c0e 2180 sdata->name, bssid,
bfc31df3 2181 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2182#endif
2183 ieee80211_mgd_probe_ap_send(sdata);
2184 } else {
2185#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2186 wiphy_debug(local->hw.wiphy,
2187 "%s: No ack for nullfunc frame to"
2188 " AP %pM, disconnecting.\n",
c658e5db 2189 sdata->name, bssid);
04ac3c0e 2190#endif
95acac61
JB		 2191 ieee80211_sta_connection_lost(sdata, bssid,
2192 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2193 }
2194 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2195 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2196 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2197#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2198 wiphy_debug(local->hw.wiphy,
2199 "%s: Failed to send nullfunc to AP %pM"
2200 " after %dms, disconnecting.\n",
2201 sdata->name,
180205bd 2202 bssid, probe_wait_ms);
04ac3c0e 2203#endif
95acac61
JB		 2204 ieee80211_sta_connection_lost(sdata, bssid,
2205 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2206 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2207#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2208 wiphy_debug(local->hw.wiphy,
2209 "%s: No probe response from AP %pM"
bfc31df3 2210 " after %dms, try %d/%i\n",
b38afa87 2211 sdata->name,
180205bd 2212 bssid, probe_wait_ms,
bfc31df3 2213 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2214#endif
2215 ieee80211_mgd_probe_ap_send(sdata);
2216 } else {
b291ba11
JB		 2217 /*
2218 * We actually lost the connection ... or did we?
2219 * Let's make sure!
2220 */
b38afa87
BG		 2221 wiphy_debug(local->hw.wiphy,
2222 "%s: No probe response from AP %pM"
2223 " after %dms, disconnecting.\n",
2224 sdata->name,
180205bd 2225 bssid, probe_wait_ms);
04ac3c0e 2226
95acac61
JB		 2227 ieee80211_sta_connection_lost(sdata, bssid,
2228 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2229 }
2230 }
2231
77fdaa12 2232 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 2233}
2234
b291ba11
JB		 2235static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2236{
2237 struct ieee80211_sub_if_data *sdata =
2238 (struct ieee80211_sub_if_data *) data;
2239 struct ieee80211_local *local = sdata->local;
2240
2241 if (local->quiescing)
2242 return;
2243
1e4dcd01
JO		 2244 ieee80211_queue_work(&sdata->local->hw,
2245 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2246}
2247
2248static void ieee80211_sta_conn_mon_timer(unsigned long data)
2249{
2250 struct ieee80211_sub_if_data *sdata =
2251 (struct ieee80211_sub_if_data *) data;
2252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2253 struct ieee80211_local *local = sdata->local;
2254
2255 if (local->quiescing)
2256 return;
2257
42935eca 2258 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2259}
2260
2261static void ieee80211_sta_monitor_work(struct work_struct *work)
2262{
2263 struct ieee80211_sub_if_data *sdata =
2264 container_of(work, struct ieee80211_sub_if_data,
2265 u.mgd.monitor_work);
2266
2267 ieee80211_mgd_probe_ap(sdata, false);
2268}
2269
9c6bd790
JB		 2270static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2271{
ad935687 2272 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2273 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2274 IEEE80211_STA_CONNECTION_POLL);
ad935687 2275
b291ba11 2276 /* let's probe the connection once */
42935eca 2277 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2278 &sdata->u.mgd.monitor_work);
2279 /* and do all the other regular work too */
64592c8f 2280 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2281 }
9c6bd790 2282}
f0706e82 2283
5bb644a0
JB		 2284#ifdef CONFIG_PM
2285void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2286{
2287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2288
2289 /*
2290 * we need to use atomic bitops for the running bits
2291 * only because both timers might fire at the same
2292 * time -- the code here is properly synchronised.
2293 */
2294
d1f5b7a3
JB		 2295 cancel_work_sync(&ifmgd->request_smps_work);
2296
1e4dcd01 2297 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2298 if (del_timer_sync(&ifmgd->timer))
2299 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2300
2301 cancel_work_sync(&ifmgd->chswitch_work);
2302 if (del_timer_sync(&ifmgd->chswitch_timer))
2303 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2304
2305 cancel_work_sync(&ifmgd->monitor_work);
2306 /* these will just be re-established on connection */
2307 del_timer_sync(&ifmgd->conn_mon_timer);
2308 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2309}
2310
2311void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2312{
2313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2314
676b58c2
RM		 2315 if (!ifmgd->associated)
2316 return;
2317
95acac61
JB		 2318 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2319 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2320 mutex_lock(&ifmgd->mtx);
2321 if (ifmgd->associated) {
2322#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2323 wiphy_debug(sdata->local->hw.wiphy,
2324 "%s: driver requested disconnect after resume.\n",
2325 sdata->name);
2326#endif
2327 ieee80211_sta_connection_lost(sdata,
2328 ifmgd->associated->bssid,
2329 WLAN_REASON_UNSPECIFIED);
2330 mutex_unlock(&ifmgd->mtx);
2331 return;
2332 }
2333 mutex_unlock(&ifmgd->mtx);
2334 }
2335
5bb644a0
JB		 2336 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2337 add_timer(&ifmgd->timer);
2338 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2339 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2340 ieee80211_sta_reset_beacon_monitor(sdata);
46090979 2341 ieee80211_restart_sta_timer(sdata);
a6af1d84 2342 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work);
5bb644a0
JB		 2343}
2344#endif
2345
9c6bd790
JB		 2346/* interface setup */
2347void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2348{
46900298 2349 struct ieee80211_if_managed *ifmgd;
988c0f72 2350
46900298 2351 ifmgd = &sdata->u.mgd;
b291ba11 2352 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2353 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2354 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2355 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2356 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2357 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2358 (unsigned long) sdata);
b291ba11
JB		 2359 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2360 (unsigned long) sdata);
2361 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2362 (unsigned long) sdata);
46900298 2363 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2364 (unsigned long) sdata);
9c6bd790 2365
ab1faead 2366 ifmgd->flags = 0;
bbbdff9e 2367
77fdaa12 2368 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2369
2370 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2371 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2372 else
2373 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2374}
2375
77fdaa12
JB		 2376/* scan finished notification */
2377void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2378{
77fdaa12 2379 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2380
77fdaa12
JB		 2381 /* Restart STA timers */
2382 rcu_read_lock();
2383 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2384 ieee80211_restart_sta_timer(sdata);
2385 rcu_read_unlock();
2386}
60f8b39c 2387
77fdaa12
JB		 2388int ieee80211_max_network_latency(struct notifier_block *nb,
2389 unsigned long data, void *dummy)
2390{
2391 s32 latency_usec = (s32) data;
2392 struct ieee80211_local *local =
2393 container_of(nb, struct ieee80211_local,
2394 network_latency_notifier);
1fa6f4af 2395
77fdaa12
JB		 2396 mutex_lock(&local->iflist_mtx);
2397 ieee80211_recalc_ps(local, latency_usec);
2398 mutex_unlock(&local->iflist_mtx);
dfe67012 2399
77fdaa12 2400 return 0;
9c6bd790
JB		 2401}
2402
77fdaa12 2403/* config hooks */
af6b6374
JB		 2404static enum work_done_result
2405ieee80211_probe_auth_done(struct ieee80211_work *wk,
2406 struct sk_buff *skb)
2407{
b2abb6e2
JB		 2408 struct ieee80211_local *local = wk->sdata->local;
2409
af6b6374
JB		 2410 if (!skb) {
2411 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2412 goto destroy;
af6b6374
JB		 2413 }
2414
2415 if (wk->type == IEEE80211_WORK_AUTH) {
2416 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
b2abb6e2 2417 goto destroy;
af6b6374
JB		 2418 }
2419
2420 mutex_lock(&wk->sdata->u.mgd.mtx);
2421 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2422 mutex_unlock(&wk->sdata->u.mgd.mtx);
2423
2424 wk->type = IEEE80211_WORK_AUTH;
2425 wk->probe_auth.tries = 0;
2426 return WORK_DONE_REQUEUE;
b2abb6e2
JB		 2427 destroy:
2428 if (wk->probe_auth.synced)
2429 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2430 IEEE80211_TX_SYNC_AUTH);
2431
2432 return WORK_DONE_DESTROY;
af6b6374
JB		 2433}
2434
77fdaa12
JB		 2435int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2436 struct cfg80211_auth_request *req)
9c6bd790 2437{
77fdaa12 2438 const u8 *ssid;
f679f65d 2439 struct ieee80211_work *wk;
77fdaa12 2440 u16 auth_alg;
9c6bd790 2441
d5cdfacb
JM		 2442 if (req->local_state_change)
2443 return 0; /* no need to update mac80211 state */
2444
77fdaa12
JB		 2445 switch (req->auth_type) {
2446 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2447 auth_alg = WLAN_AUTH_OPEN;
2448 break;
2449 case NL80211_AUTHTYPE_SHARED_KEY:
9dca9c49
JB		 2450 if (IS_ERR(sdata->local->wep_tx_tfm))
2451 return -EOPNOTSUPP;
77fdaa12
JB		 2452 auth_alg = WLAN_AUTH_SHARED_KEY;
2453 break;
2454 case NL80211_AUTHTYPE_FT:
2455 auth_alg = WLAN_AUTH_FT;
2456 break;
2457 case NL80211_AUTHTYPE_NETWORK_EAP:
2458 auth_alg = WLAN_AUTH_LEAP;
2459 break;
2460 default:
2461 return -EOPNOTSUPP;
60f8b39c 2462 }
77fdaa12
JB		 2463
2464 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2465 if (!wk)
9c6bd790 2466 return -ENOMEM;
77fdaa12 2467
5e124bd5 2468 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
77fdaa12
JB		 2469
2470 if (req->ie && req->ie_len) {
2471 memcpy(wk->ie, req->ie, req->ie_len);
2472 wk->ie_len = req->ie_len;
9c6bd790 2473 }
77fdaa12 2474
fffd0934 2475 if (req->key && req->key_len) {
af6b6374
JB		 2476 wk->probe_auth.key_len = req->key_len;
2477 wk->probe_auth.key_idx = req->key_idx;
2478 memcpy(wk->probe_auth.key, req->key, req->key_len);
fffd0934
JB		 2479 }
2480
77fdaa12 2481 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
af6b6374
JB		 2482 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2483 wk->probe_auth.ssid_len = ssid[1];
f679f65d 2484
af6b6374
JB		 2485 wk->probe_auth.algorithm = auth_alg;
2486 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2487
070bb547
JB		 2488 /* if we already have a probe, don't probe again */
2489 if (req->bss->proberesp_ies)
2490 wk->type = IEEE80211_WORK_AUTH;
2491 else
2492 wk->type = IEEE80211_WORK_DIRECT_PROBE;
f679f65d 2493 wk->chan = req->bss->channel;
4d51e149 2494 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2495 wk->sdata = sdata;
2496 wk->done = ieee80211_probe_auth_done;
77fdaa12 2497
af6b6374 2498 ieee80211_add_work(wk);
9c6bd790 2499 return 0;
60f8b39c
JB		 2500}
2501
2a33bee2
GE		 2502/* create and insert a dummy station entry */
2503static int ieee80211_pre_assoc(struct ieee80211_sub_if_data *sdata,
2504 u8 *bssid) {
2505 struct sta_info *sta;
2506 int err;
2507
2508 sta = sta_info_alloc(sdata, bssid, GFP_KERNEL);
d15b8459 2509 if (!sta)
2a33bee2 2510 return -ENOMEM;
2a33bee2
GE		 2511
2512 sta->dummy = true;
2513
2514 err = sta_info_insert(sta);
2515 sta = NULL;
2516 if (err) {
2517 printk(KERN_DEBUG "%s: failed to insert Dummy STA entry for"
2518 " the AP (error %d)\n", sdata->name, err);
2519 return err;
2520 }
2521
2522 return 0;
2523}
2524
af6b6374
JB		 2525static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2526 struct sk_buff *skb)
2527{
b2abb6e2 2528 struct ieee80211_local *local = wk->sdata->local;
af6b6374 2529 struct ieee80211_mgmt *mgmt;
e5b900d2
JB		 2530 struct ieee80211_rx_status *rx_status;
2531 struct ieee802_11_elems elems;
2a33bee2 2532 struct cfg80211_bss *cbss = wk->assoc.bss;
af6b6374
JB		 2533 u16 status;
2534
2535 if (!skb) {
2a33bee2 2536 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374 2537 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
b2abb6e2 2538 goto destroy;
af6b6374
JB		 2539 }
2540
e5b900d2
JB		 2541 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2542 mutex_lock(&wk->sdata->u.mgd.mtx);
2543 rx_status = (void *) skb->cb;
2544 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2545 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2546 &elems, true);
2547 mutex_unlock(&wk->sdata->u.mgd.mtx);
2548
2549 wk->type = IEEE80211_WORK_ASSOC;
2550 /* not really done yet */
2551 return WORK_DONE_REQUEUE;
2552 }
2553
af6b6374
JB		 2554 mgmt = (void *)skb->data;
2555 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2556
2557 if (status == WLAN_STATUS_SUCCESS) {
b2abb6e2
JB		 2558 if (wk->assoc.synced)
2559 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2560 IEEE80211_TX_SYNC_ASSOC);
2561
af6b6374
JB		 2562 mutex_lock(&wk->sdata->u.mgd.mtx);
2563 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2564 mutex_unlock(&wk->sdata->u.mgd.mtx);
2565 /* oops -- internal error -- send timeout for now */
2a33bee2 2566 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2567 cfg80211_send_assoc_timeout(wk->sdata->dev,
2568 wk->filter_ta);
2569 return WORK_DONE_DESTROY;
2570 }
68542962
JO		 2571
2572 mutex_unlock(&wk->sdata->u.mgd.mtx);
2a33bee2
GE		 2573 } else {
2574 /* assoc failed - destroy the dummy station entry */
2575 sta_info_destroy_addr(wk->sdata, cbss->bssid);
af6b6374
JB		 2576 }
2577
2578 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
b2abb6e2
JB		 2579 destroy:
2580 if (wk->assoc.synced)
2581 drv_finish_tx_sync(local, wk->sdata, wk->filter_ta,
2582 IEEE80211_TX_SYNC_ASSOC);
2583
af6b6374
JB		 2584 return WORK_DONE_DESTROY;
2585}
2586
77fdaa12
JB		 2587int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2588 struct cfg80211_assoc_request *req)
f0706e82 2589{
77fdaa12 2590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 2591 struct ieee80211_bss *bss = (void *)req->bss->priv;
f679f65d 2592 struct ieee80211_work *wk;
63f170e0 2593 const u8 *ssid;
2a33bee2 2594 int i, err;
f0706e82 2595
77fdaa12 2596 mutex_lock(&ifmgd->mtx);
af6b6374 2597 if (ifmgd->associated) {
9c87ba67
JM		 2598 if (!req->prev_bssid ||
2599 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2600 ETH_ALEN)) {
2601 /*
2602 * We are already associated and the request was not a
2603 * reassociation request from the current BSS, so
2604 * reject it.
2605 */
2606 mutex_unlock(&ifmgd->mtx);
2607 return -EALREADY;
2608 }
2609
2610 /* Trying to reassociate - clear previous association state */
53f73c09 2611 ieee80211_set_disassoc(sdata, true, false);
af6b6374
JB		 2612 }
2613 mutex_unlock(&ifmgd->mtx);
77fdaa12 2614
63f170e0 2615 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
af6b6374
JB		 2616 if (!wk)
2617 return -ENOMEM;
77fdaa12 2618
2a33bee2
GE		 2619 /*
2620 * create a dummy station info entry in order
2621 * to start accepting incoming EAPOL packets from the station
2622 */
2623 err = ieee80211_pre_assoc(sdata, req->bss->bssid);
2624 if (err) {
2625 kfree(wk);
2626 return err;
2627 }
2628
77fdaa12 2629 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 2630 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 2631
d8ec4433
JO		 2632 ifmgd->beacon_crc_valid = false;
2633
77fdaa12
JB		 2634 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2635 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2636 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2637 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2638 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2639
77fdaa12
JB		 2640
2641 if (req->ie && req->ie_len) {
2642 memcpy(wk->ie, req->ie, req->ie_len);
2643 wk->ie_len = req->ie_len;
2644 } else
2645 wk->ie_len = 0;
2646
0c1ad2ca 2647 wk->assoc.bss = req->bss;
f679f65d 2648
af6b6374 2649 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
f679f65d 2650
af6b6374
JB		 2651 /* new association always uses requested smps mode */
2652 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2653 if (ifmgd->powersave)
2654 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2655 else
2656 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2657 } else
2658 ifmgd->ap_smps = ifmgd->req_smps;
2659
2660 wk->assoc.smps = ifmgd->ap_smps;
77c8144a
JB		 2661 /*
2662 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2663 * We still associate in non-HT mode (11a/b/g) if any one of these
2664 * ciphers is configured as pairwise.
2665 * We can set this to true for non-11n hardware, that'll be checked
2666 * separately along with the peer capabilities.
2667 */
af6b6374 2668 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
f679f65d 2669 wk->assoc.capability = req->bss->capability;
0c1ad2ca
JB		 2670 wk->assoc.wmm_used = bss->wmm_used;
2671 wk->assoc.supp_rates = bss->supp_rates;
2672 wk->assoc.supp_rates_len = bss->supp_rates_len;
f679f65d
JB		 2673 wk->assoc.ht_information_ie =
2674 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0 2675
ab13315a
KV		 2676 if (bss->wmm_used && bss->uapsd_supported &&
2677 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2678 wk->assoc.uapsd_used = true;
2679 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2680 } else {
2681 wk->assoc.uapsd_used = false;
2682 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2683 }
2684
63f170e0 2685 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2686 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2687 wk->assoc.ssid_len = ssid[1];
63f170e0 2688
77fdaa12 2689 if (req->prev_bssid)
f679f65d 2690 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2691
f679f65d 2692 wk->chan = req->bss->channel;
4d51e149 2693 wk->chan_type = NL80211_CHAN_NO_HT;
af6b6374
JB		 2694 wk->sdata = sdata;
2695 wk->done = ieee80211_assoc_done;
e5b900d2
JB		 2696 if (!bss->dtim_period &&
2697 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2698 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2699 else
2700 wk->type = IEEE80211_WORK_ASSOC;
77fdaa12
JB		 2701
2702 if (req->use_mfp) {
2703 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2704 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2705 } else {
2706 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2707 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2708 }
2709
2710 if (req->crypto.control_port)
2711 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2712 else
2713 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2714
a621fa4d
JB		 2715 sdata->control_port_protocol = req->crypto.control_port_ethertype;
2716 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2717
af6b6374
JB		 2718 ieee80211_add_work(wk);
2719 return 0;
f0706e82
JB		 2720}
2721
77fdaa12 2722int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2723 struct cfg80211_deauth_request *req,
2724 void *cookie)
f0706e82 2725{
af6b6374 2726 struct ieee80211_local *local = sdata->local;
46900298 2727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2728 struct ieee80211_work *wk;
05e48e8e
JM		 2729 u8 bssid[ETH_ALEN];
2730 bool assoc_bss = false;
f0706e82 2731
77fdaa12
JB		 2732 mutex_lock(&ifmgd->mtx);
2733
05e48e8e 2734 memcpy(bssid, req->bss->bssid, ETH_ALEN);
0c1ad2ca 2735 if (ifmgd->associated == req->bss) {
53f73c09 2736 ieee80211_set_disassoc(sdata, false, true);
af6b6374 2737 mutex_unlock(&ifmgd->mtx);
05e48e8e 2738 assoc_bss = true;
af6b6374
JB		 2739 } else {
2740 bool not_auth_yet = false;
f0706e82 2741
a58ce43f 2742 mutex_unlock(&ifmgd->mtx);
a58ce43f 2743
a1699b75 2744 mutex_lock(&local->mtx);
af6b6374 2745 list_for_each_entry(wk, &local->work_list, list) {
29165e4c 2746 if (wk->sdata != sdata)
af6b6374 2747 continue;
29165e4c
JB		 2748
2749 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
79733a86 2750 wk->type != IEEE80211_WORK_AUTH &&
e5b900d2
JB		 2751 wk->type != IEEE80211_WORK_ASSOC &&
2752 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
29165e4c
JB		 2753 continue;
2754
af6b6374
JB		 2755 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2756 continue;
29165e4c
JB		 2757
2758 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2759 list_del_rcu(&wk->list);
af6b6374
JB		 2760 free_work(wk);
2761 break;
2762 }
a1699b75 2763 mutex_unlock(&local->mtx);
af6b6374
JB		 2764
2765 /*
2766 * If somebody requests authentication and we haven't
2767 * sent out an auth frame yet there's no need to send
2768 * out a deauth frame either. If the state was PROBE,
2769 * then this is the case. If it's AUTH we have sent a
2770 * frame, and if it's IDLE we have completed the auth
2771 * process already.
2772 */
2773 if (not_auth_yet) {
2774 __cfg80211_auth_canceled(sdata->dev, bssid);
2775 return 0;
2776 }
2777 }
77fdaa12 2778
0ff71613 2779 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2780 sdata->name, bssid, req->reason_code);
0ff71613 2781
d5cdfacb
JM		 2782 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2783 req->reason_code, cookie,
2784 !req->local_state_change);
05e48e8e 2785 if (assoc_bss)
07ba55d7 2786 sta_info_flush(sdata->local, sdata);
f0706e82 2787
7da7cc1d 2788 mutex_lock(&sdata->local->mtx);
bc83b681 2789 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2790 mutex_unlock(&sdata->local->mtx);
bc83b681 2791
f0706e82
JB		 2792 return 0;
2793}
84363e6e 2794
77fdaa12 2795int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2796 struct cfg80211_disassoc_request *req,
2797 void *cookie)
9c6bd790 2798{
77fdaa12 2799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 2800 u8 bssid[ETH_ALEN];
9c6bd790 2801
77fdaa12 2802 mutex_lock(&ifmgd->mtx);
10f644a4 2803
8d8b261a
JB		 2804 /*
2805 * cfg80211 should catch this ... but it's racy since
2806 * we can receive a disassoc frame, process it, hand it
2807 * to cfg80211 while that's in a locked section already
2808 * trying to tell us that the user wants to disconnect.
2809 */
0c1ad2ca 2810 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 2811 mutex_unlock(&ifmgd->mtx);
2812 return -ENOLINK;
2813 }
2814
0ff71613 2815 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2816 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2817
e69e95db 2818 memcpy(bssid, req->bss->bssid, ETH_ALEN);
53f73c09 2819 ieee80211_set_disassoc(sdata, false, true);
77fdaa12
JB		 2820
2821 mutex_unlock(&ifmgd->mtx);
10f644a4 2822
77fdaa12 2823 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd 2824 IEEE80211_STYPE_DISASSOC, req->reason_code,
d5cdfacb 2825 cookie, !req->local_state_change);
07ba55d7 2826 sta_info_flush(sdata->local, sdata);
bc83b681 2827
7da7cc1d 2828 mutex_lock(&sdata->local->mtx);
bc83b681 2829 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2830 mutex_unlock(&sdata->local->mtx);
bc83b681 2831
10f644a4
JB		 2832 return 0;
2833}
026331c4 2834
a97c13c3
JO		 2835void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2836 enum nl80211_cqm_rssi_threshold_event rssi_event,
2837 gfp_t gfp)
2838{
2839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2840
b5878a2d
JB		 2841 trace_api_cqm_rssi_notify(sdata, rssi_event);
2842
a97c13c3
JO		 2843 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2844}
2845EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
1d34d108
EP		 2846
2847unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif)
2848{
2849 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2850 return sdata->dev->operstate;
2851}
2852EXPORT_SYMBOL(ieee80211_get_operstate);
Linux kernel - Deliverables
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