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mac80211: move ieee80211_determine_chantype function
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
5bb644a0
JB		 90#define TMR_RUNNING_TIMER 0
91#define TMR_RUNNING_CHANSW 1
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
6565ec9b
JB		 177static u32 chandef_downgrade(struct cfg80211_chan_def *c)
178{
179 u32 ret;
180 int tmp;
181
182 switch (c->width) {
183 case NL80211_CHAN_WIDTH_20:
184 c->width = NL80211_CHAN_WIDTH_20_NOHT;
185 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
186 break;
187 case NL80211_CHAN_WIDTH_40:
188 c->width = NL80211_CHAN_WIDTH_20;
189 c->center_freq1 = c->chan->center_freq;
190 ret = IEEE80211_STA_DISABLE_40MHZ |
191 IEEE80211_STA_DISABLE_VHT;
192 break;
193 case NL80211_CHAN_WIDTH_80:
194 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
195 /* n_P40 */
196 tmp /= 2;
197 /* freq_P40 */
198 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
199 c->width = NL80211_CHAN_WIDTH_40;
200 ret = IEEE80211_STA_DISABLE_VHT;
201 break;
202 case NL80211_CHAN_WIDTH_80P80:
203 c->center_freq2 = 0;
204 c->width = NL80211_CHAN_WIDTH_80;
205 ret = IEEE80211_STA_DISABLE_80P80MHZ |
206 IEEE80211_STA_DISABLE_160MHZ;
207 break;
208 case NL80211_CHAN_WIDTH_160:
209 /* n_P20 */
210 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
211 /* n_P80 */
212 tmp /= 4;
213 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
214 c->width = NL80211_CHAN_WIDTH_80;
215 ret = IEEE80211_STA_DISABLE_80P80MHZ |
216 IEEE80211_STA_DISABLE_160MHZ;
217 break;
218 default:
219 case NL80211_CHAN_WIDTH_20_NOHT:
220 WARN_ON_ONCE(1);
221 c->width = NL80211_CHAN_WIDTH_20_NOHT;
222 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
223 break;
224 }
225
226 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
227
228 return ret;
229}
230
231static u32
232ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
233 struct ieee80211_supported_band *sband,
234 struct ieee80211_channel *channel,
235 const struct ieee80211_ht_operation *ht_oper,
236 const struct ieee80211_vht_operation *vht_oper,
237 struct cfg80211_chan_def *chandef)
238{
239 struct cfg80211_chan_def vht_chandef;
240 u32 ht_cfreq, ret;
241
242 chandef->chan = channel;
243 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
244 chandef->center_freq1 = channel->center_freq;
245 chandef->center_freq2 = 0;
246
247 if (!ht_oper || !sband->ht_cap.ht_supported) {
248 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
249 goto out;
250 }
251
252 chandef->width = NL80211_CHAN_WIDTH_20;
253
254 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
255 channel->band);
256 /* check that channel matches the right operating channel */
257 if (channel->center_freq != ht_cfreq) {
258 /*
259 * It's possible that some APs are confused here;
260 * Netgear WNDR3700 sometimes reports 4 higher than
261 * the actual channel in association responses, but
262 * since we look at probe response/beacon data here
263 * it should be OK.
264 */
265 sdata_info(sdata,
266 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
267 channel->center_freq, ht_cfreq,
268 ht_oper->primary_chan, channel->band);
269 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
270 goto out;
271 }
272
273 /* check 40 MHz support, if we have it */
274 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
275 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
276 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
277 chandef->width = NL80211_CHAN_WIDTH_40;
278 chandef->center_freq1 += 10;
279 break;
280 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 -= 10;
283 break;
284 }
285 } else {
286 /* 40 MHz (and 80 MHz) must be supported for VHT */
287 ret = IEEE80211_STA_DISABLE_VHT;
288 goto out;
289 }
290
291 if (!vht_oper || !sband->vht_cap.vht_supported) {
292 ret = IEEE80211_STA_DISABLE_VHT;
293 goto out;
294 }
295
296 vht_chandef.chan = channel;
297 vht_chandef.center_freq1 =
298 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
299 channel->band);
300 vht_chandef.center_freq2 = 0;
301
302 if (vht_oper->center_freq_seg2_idx)
303 vht_chandef.center_freq2 =
304 ieee80211_channel_to_frequency(
305 vht_oper->center_freq_seg2_idx,
306 channel->band);
307
308 switch (vht_oper->chan_width) {
309 case IEEE80211_VHT_CHANWIDTH_USE_HT:
310 vht_chandef.width = chandef->width;
311 break;
312 case IEEE80211_VHT_CHANWIDTH_80MHZ:
313 vht_chandef.width = NL80211_CHAN_WIDTH_80;
314 break;
315 case IEEE80211_VHT_CHANWIDTH_160MHZ:
316 vht_chandef.width = NL80211_CHAN_WIDTH_160;
317 break;
318 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
319 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
320 break;
321 default:
322 sdata_info(sdata,
323 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
324 vht_oper->chan_width);
325 ret = IEEE80211_STA_DISABLE_VHT;
326 goto out;
327 }
328
329 if (!cfg80211_chandef_valid(&vht_chandef)) {
330 sdata_info(sdata,
331 "AP VHT information is invalid, disable VHT\n");
332 ret = IEEE80211_STA_DISABLE_VHT;
333 goto out;
334 }
335
336 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
337 ret = 0;
338 goto out;
339 }
340
341 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
342 sdata_info(sdata,
343 "AP VHT information doesn't match HT, disable VHT\n");
344 ret = IEEE80211_STA_DISABLE_VHT;
345 goto out;
346 }
347
348 *chandef = vht_chandef;
349
350 ret = 0;
351
352out:
353 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
354 IEEE80211_CHAN_DISABLED)) {
355 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
356 ret = IEEE80211_STA_DISABLE_HT |
357 IEEE80211_STA_DISABLE_VHT;
358 goto out;
359 }
360
361 ret |= chandef_downgrade(chandef);
362 }
363
364 if (chandef->width != vht_chandef.width)
365 sdata_info(sdata,
366 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
367
368 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
369 return ret;
370}
371
24398e39 372static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
1128958d 373 struct sta_info *sta,
24398e39
JB		 374 struct ieee80211_ht_operation *ht_oper,
375 const u8 *bssid, bool reconfig)
d5522e03
JB		 376{
377 struct ieee80211_local *local = sdata->local;
378 struct ieee80211_supported_band *sband;
55de908a 379 struct ieee80211_channel *chan;
d5522e03 380 u32 changed = 0;
9ed6bcce 381 u16 ht_opmode;
64f68e5d 382 bool disable_40 = false;
d5522e03 383
1128958d
JB		 384 if (WARN_ON_ONCE(!sta))
385 return 0;
386
f2d9330e 387 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 388 sband = local->hw.wiphy->bands[chan->band];
d5522e03 389
4bf88530
JB		 390 switch (sdata->vif.bss_conf.chandef.width) {
391 case NL80211_CHAN_WIDTH_40:
f2d9330e 392 if (chan->center_freq >
4bf88530 393 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 394 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d 395 disable_40 = true;
f2d9330e 396 if (chan->center_freq <
4bf88530 397 sdata->vif.bss_conf.chandef.center_freq1 &&
75e6934a 398 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 399 disable_40 = true;
400 break;
401 default:
402 break;
403 }
d5522e03 404
24398e39
JB		 405 /* This can change during the lifetime of the BSS */
406 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 407 disable_40 = true;
408
e1a0c6b3 409 if (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
64f68e5d
JB		 410 disable_40 = true;
411
1128958d 412 if (disable_40 != (sta->sta.bandwidth < IEEE80211_STA_RX_BW_40)) {
64f68e5d 413 if (disable_40)
e1a0c6b3 414 sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
64f68e5d 415 else
e1a0c6b3 416 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
7cc44ed4 417
1128958d
JB		 418 if (reconfig)
419 rate_control_rate_update(local, sband, sta,
420 IEEE80211_RC_BW_CHANGED);
0aaffa9b 421 }
d5522e03 422
074d46d1 423 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 424
425 /* if bss configuration changed store the new one */
24398e39 426 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 427 changed |= BSS_CHANGED_HT;
9ed6bcce 428 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 429 }
430
431 return changed;
432}
433
9c6bd790
JB		 434/* frame sending functions */
435
66e67e41
JB		 436static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
437 struct ieee80211_supported_band *sband,
438 u32 *rates)
439{
440 int i, j, count;
441 *rates = 0;
442 count = 0;
443 for (i = 0; i < supp_rates_len; i++) {
444 int rate = (supp_rates[i] & 0x7F) * 5;
445
446 for (j = 0; j < sband->n_bitrates; j++)
447 if (sband->bitrates[j].bitrate == rate) {
448 *rates |= BIT(j);
449 count++;
450 break;
451 }
452 }
453
454 return count;
455}
456
457static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 458 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 459 struct ieee80211_supported_band *sband,
460 struct ieee80211_channel *channel,
461 enum ieee80211_smps_mode smps)
462{
66e67e41
JB		 463 u8 *pos;
464 u32 flags = channel->flags;
465 u16 cap;
466 struct ieee80211_sta_ht_cap ht_cap;
467
468 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
469
66e67e41
JB		 470 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
471 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
472
66e67e41
JB		 473 /* determine capability flags */
474 cap = ht_cap.cap;
475
9dde6423 476 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
478 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
479 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
480 cap &= ~IEEE80211_HT_CAP_SGI_40;
481 }
482 break;
483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
484 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486 cap &= ~IEEE80211_HT_CAP_SGI_40;
487 }
488 break;
489 }
490
24398e39
JB		 491 /*
492 * If 40 MHz was disabled associate as though we weren't
493 * capable of 40 MHz -- some broken APs will never fall
494 * back to trying to transmit in 20 MHz.
495 */
496 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
498 cap &= ~IEEE80211_HT_CAP_SGI_40;
499 }
500
66e67e41
JB		 501 /* set SM PS mode properly */
502 cap &= ~IEEE80211_HT_CAP_SM_PS;
503 switch (smps) {
504 case IEEE80211_SMPS_AUTOMATIC:
505 case IEEE80211_SMPS_NUM_MODES:
506 WARN_ON(1);
507 case IEEE80211_SMPS_OFF:
508 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
509 IEEE80211_HT_CAP_SM_PS_SHIFT;
510 break;
511 case IEEE80211_SMPS_STATIC:
512 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
513 IEEE80211_HT_CAP_SM_PS_SHIFT;
514 break;
515 case IEEE80211_SMPS_DYNAMIC:
516 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 }
520
521 /* reserve and fill IE */
522 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
523 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
524}
525
d545daba
MP		 526static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
527 struct sk_buff *skb,
b08fbbd8
JB		 528 struct ieee80211_supported_band *sband,
529 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 530{
531 u8 *pos;
532 u32 cap;
533 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 534 int i;
d545daba
MP		 535
536 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
537
538 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
539
540 /* determine capability flags */
541 cap = vht_cap.cap;
542
f2d9d270
JB		 543 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
544 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
545 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
546 }
547
548 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
549 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
550 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
551 }
552
b08fbbd8
JB		 553 /*
554 * Some APs apparently get confused if our capabilities are better
555 * than theirs, so restrict what we advertise in the assoc request.
556 */
557 if (!(ap_vht_cap->vht_cap_info &
558 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
559 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
560
561 if (!(ap_vht_cap->vht_cap_info &
562 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
563 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
564 IEEE80211_VHT_CAP_RXSTBC_3 |
565 IEEE80211_VHT_CAP_RXSTBC_4);
566
567 for (i = 0; i < 8; i++) {
568 int shift = i * 2;
569 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
570 u16 ap_mcs, our_mcs;
571
572 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
573 mask) >> shift;
574 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
575 mask) >> shift;
576
577 switch (ap_mcs) {
578 default:
579 if (our_mcs <= ap_mcs)
580 break;
581 /* fall through */
582 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
583 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
584 vht_cap.vht_mcs.rx_mcs_map |=
585 cpu_to_le16(ap_mcs << shift);
586 }
587 }
588
d545daba 589 /* reserve and fill IE */
d4950281 590 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 591 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
592}
593
66e67e41
JB		 594static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
595{
596 struct ieee80211_local *local = sdata->local;
597 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
598 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
599 struct sk_buff *skb;
600 struct ieee80211_mgmt *mgmt;
601 u8 *pos, qos_info;
602 size_t offset = 0, noffset;
603 int i, count, rates_len, supp_rates_len;
604 u16 capab;
605 struct ieee80211_supported_band *sband;
55de908a
JB		 606 struct ieee80211_chanctx_conf *chanctx_conf;
607 struct ieee80211_channel *chan;
66e67e41 608 u32 rates = 0;
66e67e41
JB		 609
610 lockdep_assert_held(&ifmgd->mtx);
611
55de908a
JB		 612 rcu_read_lock();
613 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
614 if (WARN_ON(!chanctx_conf)) {
615 rcu_read_unlock();
616 return;
617 }
4bf88530 618 chan = chanctx_conf->def.chan;
55de908a
JB		 619 rcu_read_unlock();
620 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 621
622 if (assoc_data->supp_rates_len) {
623 /*
624 * Get all rates supported by the device and the AP as
625 * some APs don't like getting a superset of their rates
626 * in the association request (e.g. D-Link DAP 1353 in
627 * b-only mode)...
628 */
629 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
630 assoc_data->supp_rates_len,
631 sband, &rates);
632 } else {
633 /*
634 * In case AP not provide any supported rates information
635 * before association, we send information element(s) with
636 * all rates that we support.
637 */
638 rates = ~0;
639 rates_len = sband->n_bitrates;
640 }
641
642 skb = alloc_skb(local->hw.extra_tx_headroom +
643 sizeof(*mgmt) + /* bit too much but doesn't matter */
644 2 + assoc_data->ssid_len + /* SSID */
645 4 + rates_len + /* (extended) rates */
646 4 + /* power capability */
647 2 + 2 * sband->n_channels + /* supported channels */
648 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 649 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 650 assoc_data->ie_len + /* extra IEs */
651 9, /* WMM */
652 GFP_KERNEL);
653 if (!skb)
654 return;
655
656 skb_reserve(skb, local->hw.extra_tx_headroom);
657
658 capab = WLAN_CAPABILITY_ESS;
659
660 if (sband->band == IEEE80211_BAND_2GHZ) {
661 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
662 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
665 }
666
667 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
668 capab |= WLAN_CAPABILITY_PRIVACY;
669
670 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
671 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
672 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
673
674 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
675 memset(mgmt, 0, 24);
676 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
677 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
678 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
679
680 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
681 skb_put(skb, 10);
682 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
683 IEEE80211_STYPE_REASSOC_REQ);
684 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
685 mgmt->u.reassoc_req.listen_interval =
686 cpu_to_le16(local->hw.conf.listen_interval);
687 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
688 ETH_ALEN);
689 } else {
690 skb_put(skb, 4);
691 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
692 IEEE80211_STYPE_ASSOC_REQ);
693 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
694 mgmt->u.assoc_req.listen_interval =
695 cpu_to_le16(local->hw.conf.listen_interval);
696 }
697
698 /* SSID */
699 pos = skb_put(skb, 2 + assoc_data->ssid_len);
700 *pos++ = WLAN_EID_SSID;
701 *pos++ = assoc_data->ssid_len;
702 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
703
704 /* add all rates which were marked to be used above */
705 supp_rates_len = rates_len;
706 if (supp_rates_len > 8)
707 supp_rates_len = 8;
708
709 pos = skb_put(skb, supp_rates_len + 2);
710 *pos++ = WLAN_EID_SUPP_RATES;
711 *pos++ = supp_rates_len;
712
713 count = 0;
714 for (i = 0; i < sband->n_bitrates; i++) {
715 if (BIT(i) & rates) {
716 int rate = sband->bitrates[i].bitrate;
717 *pos++ = (u8) (rate / 5);
718 if (++count == 8)
719 break;
720 }
721 }
722
723 if (rates_len > count) {
724 pos = skb_put(skb, rates_len - count + 2);
725 *pos++ = WLAN_EID_EXT_SUPP_RATES;
726 *pos++ = rates_len - count;
727
728 for (i++; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
730 int rate = sband->bitrates[i].bitrate;
731 *pos++ = (u8) (rate / 5);
732 }
733 }
734 }
735
736 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
737 /* 1. power capabilities */
738 pos = skb_put(skb, 4);
739 *pos++ = WLAN_EID_PWR_CAPABILITY;
740 *pos++ = 2;
741 *pos++ = 0; /* min tx power */
55de908a 742 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 743
744 /* 2. supported channels */
745 /* TODO: get this in reg domain format */
746 pos = skb_put(skb, 2 * sband->n_channels + 2);
747 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
748 *pos++ = 2 * sband->n_channels;
749 for (i = 0; i < sband->n_channels; i++) {
750 *pos++ = ieee80211_frequency_to_channel(
751 sband->channels[i].center_freq);
752 *pos++ = 1; /* one channel in the subband*/
753 }
754 }
755
756 /* if present, add any custom IEs that go before HT */
757 if (assoc_data->ie_len && assoc_data->ie) {
758 static const u8 before_ht[] = {
759 WLAN_EID_SSID,
760 WLAN_EID_SUPP_RATES,
761 WLAN_EID_EXT_SUPP_RATES,
762 WLAN_EID_PWR_CAPABILITY,
763 WLAN_EID_SUPPORTED_CHANNELS,
764 WLAN_EID_RSN,
765 WLAN_EID_QOS_CAPA,
766 WLAN_EID_RRM_ENABLED_CAPABILITIES,
767 WLAN_EID_MOBILITY_DOMAIN,
768 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
769 };
770 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
771 before_ht, ARRAY_SIZE(before_ht),
772 offset);
773 pos = skb_put(skb, noffset - offset);
774 memcpy(pos, assoc_data->ie + offset, noffset - offset);
775 offset = noffset;
776 }
777
f2d9d270
JB		 778 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
779 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
780 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
781
a8243b72 782 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 783 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 784 sband, chan, sdata->smps_mode);
66e67e41 785
d545daba 786 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 787 ieee80211_add_vht_ie(sdata, skb, sband,
788 &assoc_data->ap_vht_cap);
d545daba 789
66e67e41
JB		 790 /* if present, add any custom non-vendor IEs that go after HT */
791 if (assoc_data->ie_len && assoc_data->ie) {
792 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
793 assoc_data->ie_len,
794 offset);
795 pos = skb_put(skb, noffset - offset);
796 memcpy(pos, assoc_data->ie + offset, noffset - offset);
797 offset = noffset;
798 }
799
76f0303d
JB		 800 if (assoc_data->wmm) {
801 if (assoc_data->uapsd) {
dc41e4d4
EP		 802 qos_info = ifmgd->uapsd_queues;
803 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 804 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
805 } else {
806 qos_info = 0;
807 }
808
809 pos = skb_put(skb, 9);
810 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
811 *pos++ = 7; /* len */
812 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
813 *pos++ = 0x50;
814 *pos++ = 0xf2;
815 *pos++ = 2; /* WME */
816 *pos++ = 0; /* WME info */
817 *pos++ = 1; /* WME ver */
818 *pos++ = qos_info;
819 }
820
821 /* add any remaining custom (i.e. vendor specific here) IEs */
822 if (assoc_data->ie_len && assoc_data->ie) {
823 noffset = assoc_data->ie_len;
824 pos = skb_put(skb, noffset - offset);
825 memcpy(pos, assoc_data->ie + offset, noffset - offset);
826 }
827
a1845fc7
JB		 828 drv_mgd_prepare_tx(local, sdata);
829
66e67e41 830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 831 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
832 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
833 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 834 ieee80211_tx_skb(sdata, skb);
835}
836
572e0012
KV		 837void ieee80211_send_pspoll(struct ieee80211_local *local,
838 struct ieee80211_sub_if_data *sdata)
839{
572e0012
KV		 840 struct ieee80211_pspoll *pspoll;
841 struct sk_buff *skb;
572e0012 842
d8cd189e
KV		 843 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
844 if (!skb)
572e0012 845 return;
572e0012 846
d8cd189e
KV		 847 pspoll = (struct ieee80211_pspoll *) skb->data;
848 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 849
62ae67be
JB		 850 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
851 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 852}
853
965bedad
JB		 854void ieee80211_send_nullfunc(struct ieee80211_local *local,
855 struct ieee80211_sub_if_data *sdata,
856 int powersave)
857{
858 struct sk_buff *skb;
d8cd189e 859 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 861
d8cd189e
KV		 862 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
863 if (!skb)
965bedad 864 return;
965bedad 865
d8cd189e 866 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 867 if (powersave)
d8cd189e 868 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 869
6c17b77b
SF		 870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
871 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 872 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
873 IEEE80211_STA_CONNECTION_POLL))
874 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
875
62ae67be 876 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 877}
878
d524215f
FF		 879static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
880 struct ieee80211_sub_if_data *sdata)
881{
882 struct sk_buff *skb;
883 struct ieee80211_hdr *nullfunc;
884 __le16 fc;
885
886 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
887 return;
888
889 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 890 if (!skb)
d524215f 891 return;
d15b8459 892
d524215f
FF		 893 skb_reserve(skb, local->hw.extra_tx_headroom);
894
895 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
896 memset(nullfunc, 0, 30);
897 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
898 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
899 nullfunc->frame_control = fc;
900 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
901 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
902 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
903 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
904
905 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
906 ieee80211_tx_skb(sdata, skb);
907}
908
cc32abd4
JB		 909/* spectrum management related things */
910static void ieee80211_chswitch_work(struct work_struct *work)
911{
912 struct ieee80211_sub_if_data *sdata =
913 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
915
9607e6b6 916 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 917 return;
918
77fdaa12
JB		 919 mutex_lock(&ifmgd->mtx);
920 if (!ifmgd->associated)
921 goto out;
cc32abd4 922
55de908a 923 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 924 if (!sdata->local->ops->channel_switch) {
925 /* call "hw_config" only if doing sw channel switch */
926 ieee80211_hw_config(sdata->local,
927 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 928 } else {
929 /* update the device channel directly */
55de908a 930 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 931 }
77fdaa12 932
cc32abd4 933 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 934 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 935
57eebdf3 936 /* XXX: wait for a beacon first? */
cc32abd4
JB		 937 ieee80211_wake_queues_by_reason(&sdata->local->hw,
938 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 939 out:
940 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
941 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 942}
943
5ce6e438
JB		 944void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
945{
55de908a
JB		 946 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 948
949 trace_api_chswitch_done(sdata, success);
950 if (!success) {
882a7c69
JB		 951 sdata_info(sdata,
952 "driver channel switch failed, disconnecting\n");
953 ieee80211_queue_work(&sdata->local->hw,
954 &ifmgd->csa_connection_drop_work);
955 } else {
956 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 957 }
5ce6e438
JB		 958}
959EXPORT_SYMBOL(ieee80211_chswitch_done);
960
cc32abd4
JB		 961static void ieee80211_chswitch_timer(unsigned long data)
962{
963 struct ieee80211_sub_if_data *sdata =
964 (struct ieee80211_sub_if_data *) data;
965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
966
5bb644a0
JB		 967 if (sdata->local->quiescing) {
968 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
969 return;
970 }
971
42935eca 972 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 973}
974
975void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 977 struct ieee80211_bss *bss,
978 u64 timestamp)
cc32abd4 979{
0c1ad2ca
JB		 980 struct cfg80211_bss *cbss =
981 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 982 struct ieee80211_channel *new_ch;
983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 984 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
985 cbss->channel->band);
55de908a 986 struct ieee80211_chanctx *chanctx;
cc32abd4 987
77fdaa12
JB		 988 ASSERT_MGD_MTX(ifmgd);
989
990 if (!ifmgd->associated)
cc32abd4
JB		 991 return;
992
fbe9c429 993 if (sdata->local->scanning)
cc32abd4
JB		 994 return;
995
996 /* Disregard subsequent beacons if we are already running a timer
997 processing a CSA */
998
999 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1000 return;
1001
1002 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1003 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1004 sdata_info(sdata,
1005 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1006 ifmgd->associated->bssid, new_freq);
1007 ieee80211_queue_work(&sdata->local->hw,
1008 &ifmgd->csa_connection_drop_work);
cc32abd4 1009 return;
882a7c69 1010 }
cc32abd4 1011
57eebdf3
JB		 1012 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1013
55de908a
JB		 1014 if (sdata->local->use_chanctx) {
1015 sdata_info(sdata,
1016 "not handling channel switch with channel contexts\n");
1017 ieee80211_queue_work(&sdata->local->hw,
1018 &ifmgd->csa_connection_drop_work);
246dc3fd 1019 return;
55de908a
JB		 1020 }
1021
1022 mutex_lock(&sdata->local->chanctx_mtx);
1023 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1024 mutex_unlock(&sdata->local->chanctx_mtx);
1025 return;
1026 }
1027 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1028 struct ieee80211_chanctx, conf);
1029 if (chanctx->refcount > 1) {
1030 sdata_info(sdata,
1031 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1032 ieee80211_queue_work(&sdata->local->hw,
1033 &ifmgd->csa_connection_drop_work);
1034 mutex_unlock(&sdata->local->chanctx_mtx);
1035 return;
1036 }
1037 mutex_unlock(&sdata->local->chanctx_mtx);
1038
1039 sdata->local->csa_channel = new_ch;
1040
57eebdf3
JB		 1041 if (sw_elem->mode)
1042 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1043 IEEE80211_QUEUE_STOP_REASON_CSA);
1044
5ce6e438
JB		 1045 if (sdata->local->ops->channel_switch) {
1046 /* use driver's channel switch callback */
57eebdf3
JB		 1047 struct ieee80211_channel_switch ch_switch = {
1048 .timestamp = timestamp,
1049 .block_tx = sw_elem->mode,
1050 .channel = new_ch,
1051 .count = sw_elem->count,
1052 };
1053
5ce6e438
JB		 1054 drv_channel_switch(sdata->local, &ch_switch);
1055 return;
1056 }
1057
1058 /* channel switch handled in software */
57eebdf3 1059 if (sw_elem->count <= 1)
42935eca 1060 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1061 else
cc32abd4 1062 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1063 TU_TO_EXP_TIME(sw_elem->count *
1064 cbss->beacon_interval));
cc32abd4
JB		 1065}
1066
1ea6f9c0
JB		 1067static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1068 struct ieee80211_channel *channel,
1069 const u8 *country_ie, u8 country_ie_len,
1070 const u8 *pwr_constr_elem)
cc32abd4 1071{
04b7b2ff
JB		 1072 struct ieee80211_country_ie_triplet *triplet;
1073 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1074 int i, chan_pwr, chan_increment, new_ap_level;
1075 bool have_chan_pwr = false;
cc32abd4 1076
04b7b2ff
JB		 1077 /* Invalid IE */
1078 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1079 return 0;
cc32abd4 1080
04b7b2ff
JB		 1081 triplet = (void *)(country_ie + 3);
1082 country_ie_len -= 3;
1083
1084 switch (channel->band) {
1085 default:
1086 WARN_ON_ONCE(1);
1087 /* fall through */
1088 case IEEE80211_BAND_2GHZ:
1089 case IEEE80211_BAND_60GHZ:
1090 chan_increment = 1;
1091 break;
1092 case IEEE80211_BAND_5GHZ:
1093 chan_increment = 4;
1094 break;
cc32abd4 1095 }
04b7b2ff
JB		 1096
1097 /* find channel */
1098 while (country_ie_len >= 3) {
1099 u8 first_channel = triplet->chans.first_channel;
1100
1101 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1102 goto next;
1103
1104 for (i = 0; i < triplet->chans.num_channels; i++) {
1105 if (first_channel + i * chan_increment == chan) {
1106 have_chan_pwr = true;
1107 chan_pwr = triplet->chans.max_power;
1108 break;
1109 }
1110 }
1111 if (have_chan_pwr)
1112 break;
1113
1114 next:
1115 triplet++;
1116 country_ie_len -= 3;
1117 }
1118
1119 if (!have_chan_pwr)
1ea6f9c0 1120 return 0;
04b7b2ff
JB		 1121
1122 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1123
1ea6f9c0
JB		 1124 if (sdata->ap_power_level == new_ap_level)
1125 return 0;
04b7b2ff
JB		 1126
1127 sdata_info(sdata,
1128 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1129 new_ap_level, chan_pwr, *pwr_constr_elem,
1130 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1131 sdata->ap_power_level = new_ap_level;
1132 if (__ieee80211_recalc_txpower(sdata))
1133 return BSS_CHANGED_TXPOWER;
1134 return 0;
cc32abd4
JB		 1135}
1136
965bedad
JB		 1137/* powersave */
1138static void ieee80211_enable_ps(struct ieee80211_local *local,
1139 struct ieee80211_sub_if_data *sdata)
1140{
1141 struct ieee80211_conf *conf = &local->hw.conf;
1142
d5edaedc
JB		 1143 /*
1144 * If we are scanning right now then the parameters will
1145 * take effect when scan finishes.
1146 */
fbe9c429 1147 if (local->scanning)
d5edaedc
JB		 1148 return;
1149
965bedad
JB		 1150 if (conf->dynamic_ps_timeout > 0 &&
1151 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1152 mod_timer(&local->dynamic_ps_timer, jiffies +
1153 msecs_to_jiffies(conf->dynamic_ps_timeout));
1154 } else {
1155 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1156 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1157
2a13052f
JO		 1158 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1159 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1160 return;
1161
1162 conf->flags |= IEEE80211_CONF_PS;
1163 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1164 }
1165}
1166
1167static void ieee80211_change_ps(struct ieee80211_local *local)
1168{
1169 struct ieee80211_conf *conf = &local->hw.conf;
1170
1171 if (local->ps_sdata) {
965bedad
JB		 1172 ieee80211_enable_ps(local, local->ps_sdata);
1173 } else if (conf->flags & IEEE80211_CONF_PS) {
1174 conf->flags &= ~IEEE80211_CONF_PS;
1175 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1176 del_timer_sync(&local->dynamic_ps_timer);
1177 cancel_work_sync(&local->dynamic_ps_enable_work);
1178 }
1179}
1180
808118cb
JY		 1181static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1182{
1183 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1184 struct sta_info *sta = NULL;
c2c98fde 1185 bool authorized = false;
808118cb
JY		 1186
1187 if (!mgd->powersave)
1188 return false;
1189
05cb9108
JB		 1190 if (mgd->broken_ap)
1191 return false;
1192
808118cb
JY		 1193 if (!mgd->associated)
1194 return false;
1195
808118cb
JY		 1196 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1197 IEEE80211_STA_CONNECTION_POLL))
1198 return false;
1199
1200 rcu_read_lock();
1201 sta = sta_info_get(sdata, mgd->bssid);
1202 if (sta)
c2c98fde 1203 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1204 rcu_read_unlock();
1205
c2c98fde 1206 return authorized;
808118cb
JY		 1207}
1208
965bedad 1209/* need to hold RTNL or interface lock */
10f644a4 1210void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1211{
1212 struct ieee80211_sub_if_data *sdata, *found = NULL;
1213 int count = 0;
195e294d 1214 int timeout;
965bedad
JB		 1215
1216 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1217 local->ps_sdata = NULL;
1218 return;
1219 }
1220
1221 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1222 if (!ieee80211_sdata_running(sdata))
965bedad 1223 continue;
8c7914de
RM		 1224 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1225 /* If an AP vif is found, then disable PS
1226 * by setting the count to zero thereby setting
1227 * ps_sdata to NULL.
1228 */
1229 count = 0;
1230 break;
1231 }
965bedad
JB		 1232 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1233 continue;
1234 found = sdata;
1235 count++;
1236 }
1237
808118cb 1238 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1239 s32 beaconint_us;
1240
1241 if (latency < 0)
ed77134b 1242 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1243
1244 beaconint_us = ieee80211_tu_to_usec(
1245 found->vif.bss_conf.beacon_int);
1246
ff616381 1247 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1248 if (timeout < 0) {
1249 /*
ff616381
JO		 1250 * Go to full PSM if the user configures a very low
1251 * latency requirement.
0ab82b04
EP		 1252 * The 2000 second value is there for compatibility
1253 * until the PM_QOS_NETWORK_LATENCY is configured
1254 * with real values.
195e294d 1255 */
0ab82b04
EP		 1256 if (latency > (1900 * USEC_PER_MSEC) &&
1257 latency != (2000 * USEC_PER_SEC))
195e294d 1258 timeout = 0;
ff616381
JO		 1259 else
1260 timeout = 100;
195e294d 1261 }
09b85568 1262 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1263
04fe2037 1264 if (beaconint_us > latency) {
10f644a4 1265 local->ps_sdata = NULL;
04fe2037 1266 } else {
04fe2037 1267 int maxslp = 1;
826262c3 1268 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1269
1270 /* If the TIM IE is invalid, pretend the value is 1 */
1271 if (!dtimper)
1272 dtimper = 1;
1273 else if (dtimper > 1)
04fe2037
JB		 1274 maxslp = min_t(int, dtimper,
1275 latency / beaconint_us);
1276
9ccebe61 1277 local->hw.conf.max_sleep_period = maxslp;
56007a02 1278 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1279 local->ps_sdata = found;
04fe2037 1280 }
10f644a4 1281 } else {
965bedad 1282 local->ps_sdata = NULL;
10f644a4 1283 }
965bedad
JB		 1284
1285 ieee80211_change_ps(local);
1286}
1287
ab095877
EP		 1288void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1289{
1290 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1291
1292 if (sdata->vif.bss_conf.ps != ps_allowed) {
1293 sdata->vif.bss_conf.ps = ps_allowed;
1294 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1295 }
1296}
1297
965bedad
JB		 1298void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1299{
1300 struct ieee80211_local *local =
1301 container_of(work, struct ieee80211_local,
1302 dynamic_ps_disable_work);
1303
1304 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1305 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1306 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1307 }
1308
1309 ieee80211_wake_queues_by_reason(&local->hw,
1310 IEEE80211_QUEUE_STOP_REASON_PS);
1311}
1312
1313void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1314{
1315 struct ieee80211_local *local =
1316 container_of(work, struct ieee80211_local,
1317 dynamic_ps_enable_work);
1318 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1319 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1320 unsigned long flags;
1321 int q;
965bedad
JB		 1322
1323 /* can only happen when PS was just disabled anyway */
1324 if (!sdata)
1325 return;
1326
5e34069c
CL		 1327 ifmgd = &sdata->u.mgd;
1328
965bedad
JB		 1329 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1330 return;
1331
09b85568 1332 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1333 /* don't enter PS if TX frames are pending */
1334 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1335 mod_timer(&local->dynamic_ps_timer, jiffies +
1336 msecs_to_jiffies(
1337 local->hw.conf.dynamic_ps_timeout));
1338 return;
1339 }
77b7023a
AN		 1340
1341 /*
1342 * transmission can be stopped by others which leads to
1343 * dynamic_ps_timer expiry. Postpone the ps timer if it
1344 * is not the actual idle state.
1345 */
1346 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1347 for (q = 0; q < local->hw.queues; q++) {
1348 if (local->queue_stop_reasons[q]) {
1349 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1350 flags);
1351 mod_timer(&local->dynamic_ps_timer, jiffies +
1352 msecs_to_jiffies(
1353 local->hw.conf.dynamic_ps_timeout));
1354 return;
1355 }
1356 }
1357 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1358 }
1ddc2867 1359
375177bf 1360 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1361 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1362 netif_tx_stop_all_queues(sdata->dev);
965bedad 1363
e8306f98
VN		 1364 if (drv_tx_frames_pending(local))
1365 mod_timer(&local->dynamic_ps_timer, jiffies +
1366 msecs_to_jiffies(
1367 local->hw.conf.dynamic_ps_timeout));
1368 else {
1369 ieee80211_send_nullfunc(local, sdata, 1);
1370 /* Flush to get the tx status of nullfunc frame */
1371 drv_flush(local, false);
1372 }
f3e85b9e
VN		 1373 }
1374
2a13052f
JO		 1375 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1376 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1379 local->hw.conf.flags |= IEEE80211_CONF_PS;
1380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1381 }
f3e85b9e 1382
77b7023a
AN		 1383 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1384 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1385}
1386
1387void ieee80211_dynamic_ps_timer(unsigned long data)
1388{
1389 struct ieee80211_local *local = (void *) data;
1390
78f1a8b7 1391 if (local->quiescing || local->suspended)
5bb644a0
JB		 1392 return;
1393
42935eca 1394 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1395}
1396
164eb02d
SW		 1397void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1398{
1399 struct delayed_work *delayed_work =
1400 container_of(work, struct delayed_work, work);
1401 struct ieee80211_sub_if_data *sdata =
1402 container_of(delayed_work, struct ieee80211_sub_if_data,
1403 dfs_cac_timer_work);
1404
1405 ieee80211_vif_release_channel(sdata);
1406
1407 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1408}
1409
60f8b39c 1410/* MLME */
7d25745d 1411static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1412 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1413 u8 *wmm_param, size_t wmm_param_len)
1414{
f0706e82 1415 struct ieee80211_tx_queue_params params;
4ced3f74 1416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1417 size_t left;
1418 int count;
ab13315a 1419 u8 *pos, uapsd_queues = 0;
f0706e82 1420
e1b3ec1a 1421 if (!local->ops->conf_tx)
7d25745d 1422 return false;
e1b3ec1a 1423
32c5057b 1424 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1425 return false;
3434fbd3
JB		 1426
1427 if (!wmm_param)
7d25745d 1428 return false;
3434fbd3 1429
f0706e82 1430 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1431 return false;
ab13315a
KV		 1432
1433 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1434 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1435
f0706e82 1436 count = wmm_param[6] & 0x0f;
46900298 1437 if (count == ifmgd->wmm_last_param_set)
7d25745d 1438 return false;
46900298 1439 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1440
1441 pos = wmm_param + 8;
1442 left = wmm_param_len - 8;
1443
1444 memset(&params, 0, sizeof(params));
1445
00e96dec 1446 sdata->wmm_acm = 0;
f0706e82
JB		 1447 for (; left >= 4; left -= 4, pos += 4) {
1448 int aci = (pos[0] >> 5) & 0x03;
1449 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1450 bool uapsd = false;
f0706e82
JB		 1451 int queue;
1452
1453 switch (aci) {
0eeb59fe 1454 case 1: /* AC_BK */
e100bb64 1455 queue = 3;
988c0f72 1456 if (acm)
00e96dec 1457 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1458 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1459 uapsd = true;
f0706e82 1460 break;
0eeb59fe 1461 case 2: /* AC_VI */
e100bb64 1462 queue = 1;
988c0f72 1463 if (acm)
00e96dec 1464 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1466 uapsd = true;
f0706e82 1467 break;
0eeb59fe 1468 case 3: /* AC_VO */
e100bb64 1469 queue = 0;
988c0f72 1470 if (acm)
00e96dec 1471 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1472 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1473 uapsd = true;
f0706e82 1474 break;
0eeb59fe 1475 case 0: /* AC_BE */
f0706e82 1476 default:
e100bb64 1477 queue = 2;
988c0f72 1478 if (acm)
00e96dec 1479 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1480 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1481 uapsd = true;
f0706e82
JB		 1482 break;
1483 }
1484
1485 params.aifs = pos[0] & 0x0f;
1486 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1487 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1488 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1489 params.uapsd = uapsd;
1490
bdcbd8e0
JB		 1491 mlme_dbg(sdata,
1492 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1493 queue, aci, acm,
1494 params.aifs, params.cw_min, params.cw_max,
1495 params.txop, params.uapsd);
f6f3def3
EP		 1496 sdata->tx_conf[queue] = params;
1497 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1498 sdata_err(sdata,
1499 "failed to set TX queue parameters for queue %d\n",
1500 queue);
f0706e82 1501 }
e1b3ec1a
SG		 1502
1503 /* enable WMM or activate new settings */
4ced3f74 1504 sdata->vif.bss_conf.qos = true;
7d25745d 1505 return true;
f0706e82
JB		 1506}
1507
925e64c3
SG		 1508static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1509{
1510 lockdep_assert_held(&sdata->local->mtx);
1511
1512 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1513 IEEE80211_STA_BEACON_POLL);
1514 ieee80211_run_deferred_scan(sdata->local);
1515}
1516
1517static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1518{
1519 mutex_lock(&sdata->local->mtx);
1520 __ieee80211_stop_poll(sdata);
1521 mutex_unlock(&sdata->local->mtx);
1522}
1523
7a5158ef
JB		 1524static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1525 u16 capab, bool erp_valid, u8 erp)
5628221c 1526{
bda3933a 1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1528 u32 changed = 0;
7a5158ef
JB		 1529 bool use_protection;
1530 bool use_short_preamble;
1531 bool use_short_slot;
1532
1533 if (erp_valid) {
1534 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1535 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1536 } else {
1537 use_protection = false;
1538 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1539 }
1540
1541 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1542 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1543 use_short_slot = true;
5628221c 1544
471b3efd 1545 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1546 bss_conf->use_cts_prot = use_protection;
1547 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1548 }
7e9ed188 1549
d43c7b37 1550 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1551 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1552 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1553 }
d9430a32 1554
7a5158ef 1555 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1556 bss_conf->use_short_slot = use_short_slot;
1557 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1558 }
1559
1560 return changed;
1561}
1562
f698d856 1563static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1564 struct cfg80211_bss *cbss,
ae5eb026 1565 u32 bss_info_changed)
f0706e82 1566{
0c1ad2ca 1567 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1568 struct ieee80211_local *local = sdata->local;
68542962 1569 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1570
ae5eb026 1571 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1572 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1573 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1574
7ccc8bd7
FF		 1575 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1576 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1577
0c1ad2ca
JB		 1578 sdata->u.mgd.associated = cbss;
1579 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1580
17e4ec14
JM		 1581 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1582
488dd7b5 1583 if (sdata->vif.p2p) {
9caf0364 1584 const struct cfg80211_bss_ies *ies;
488dd7b5 1585
9caf0364
JB		 1586 rcu_read_lock();
1587 ies = rcu_dereference(cbss->ies);
1588 if (ies) {
1589 u8 noa[2];
1590 int ret;
1591
1592 ret = cfg80211_get_p2p_attr(
1593 ies->data, ies->len,
1594 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1595 noa, sizeof(noa));
1596 if (ret >= 2) {
1597 bss_conf->p2p_oppps = noa[1] & 0x80;
1598 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1599 bss_info_changed |= BSS_CHANGED_P2P_PS;
1600 sdata->u.mgd.p2p_noa_index = noa[0];
1601 }
488dd7b5 1602 }
9caf0364 1603 rcu_read_unlock();
488dd7b5
JB		 1604 }
1605
b291ba11 1606 /* just to be sure */
925e64c3 1607 ieee80211_stop_poll(sdata);
b291ba11 1608
9ac19a90 1609 ieee80211_led_assoc(local, 1);
9306102e 1610
c65dd147 1611 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1612 /*
1613 * If the AP is buggy we may get here with no DTIM period
1614 * known, so assume it's 1 which is the only safe assumption
1615 * in that case, although if the TIM IE is broken powersave
1616 * probably just won't work at all.
1617 */
1618 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1619 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1620 } else {
e5b900d2 1621 bss_conf->dtim_period = 0;
826262c3 1622 }
e5b900d2 1623
68542962 1624 bss_conf->assoc = 1;
9cef8737 1625
a97c13c3 1626 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1627 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1628 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1629 bss_info_changed |= BSS_CHANGED_CQM;
1630
68542962 1631 /* Enable ARP filtering */
0f19b41e 1632 if (bss_conf->arp_addr_cnt)
68542962 1633 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1634
ae5eb026 1635 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1636
056508dc
JB		 1637 mutex_lock(&local->iflist_mtx);
1638 ieee80211_recalc_ps(local, -1);
1639 mutex_unlock(&local->iflist_mtx);
e0cb686f 1640
04ecd257 1641 ieee80211_recalc_smps(sdata);
ab095877
EP		 1642 ieee80211_recalc_ps_vif(sdata);
1643
8a5b33f5 1644 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1645 netif_carrier_on(sdata->dev);
f0706e82
JB		 1646}
1647
e69e95db 1648static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1649 u16 stype, u16 reason, bool tx,
1650 u8 *frame_buf)
aa458d17 1651{
46900298 1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1653 struct ieee80211_local *local = sdata->local;
3cc5240b 1654 u32 changed = 0;
aa458d17 1655
77fdaa12
JB		 1656 ASSERT_MGD_MTX(ifmgd);
1657
37ad3888
JB		 1658 if (WARN_ON_ONCE(tx && !frame_buf))
1659 return;
1660
b291ba11
JB		 1661 if (WARN_ON(!ifmgd->associated))
1662 return;
1663
79543d8e
DS		 1664 ieee80211_stop_poll(sdata);
1665
77fdaa12 1666 ifmgd->associated = NULL;
77fdaa12
JB		 1667
1668 /*
1669 * we need to commit the associated = NULL change because the
1670 * scan code uses that to determine whether this iface should
1671 * go to/wake up from powersave or not -- and could otherwise
1672 * wake the queues erroneously.
1673 */
1674 smp_mb();
1675
1676 /*
1677 * Thus, we can only afterwards stop the queues -- to account
1678 * for the case where another CPU is finishing a scan at this
1679 * time -- we don't want the scan code to enable queues.
1680 */
aa458d17 1681
8a5b33f5 1682 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1683 netif_carrier_off(sdata->dev);
1684
88bc40e8
EP		 1685 /*
1686 * if we want to get out of ps before disassoc (why?) we have
1687 * to do it before sending disassoc, as otherwise the null-packet
1688 * won't be valid.
1689 */
1690 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1691 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1692 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1693 }
1694 local->ps_sdata = NULL;
1695
ab095877
EP		 1696 /* disable per-vif ps */
1697 ieee80211_recalc_ps_vif(sdata);
1698
f823981e
EP		 1699 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1700 if (tx)
1701 drv_flush(local, false);
1702
37ad3888
JB		 1703 /* deauthenticate/disassociate now */
1704 if (tx || frame_buf)
88a9e31c
EP		 1705 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1706 reason, tx, frame_buf);
37ad3888
JB		 1707
1708 /* flush out frame */
1709 if (tx)
1710 drv_flush(local, false);
1711
88a9e31c
EP		 1712 /* clear bssid only after building the needed mgmt frames */
1713 memset(ifmgd->bssid, 0, ETH_ALEN);
1714
37ad3888 1715 /* remove AP and TDLS peers */
051007d9 1716 sta_info_flush_defer(sdata);
37ad3888
JB		 1717
1718 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1719 changed |= ieee80211_reset_erp_info(sdata);
1720
f5e5bf25 1721 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1722 changed |= BSS_CHANGED_ASSOC;
1723 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1724
488dd7b5
JB		 1725 sdata->vif.bss_conf.p2p_ctwindow = 0;
1726 sdata->vif.bss_conf.p2p_oppps = false;
1727
413ad50a 1728 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1729 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1730 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1731
1ea6f9c0 1732 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1733
520eb820
KV		 1734 del_timer_sync(&local->dynamic_ps_timer);
1735 cancel_work_sync(&local->dynamic_ps_enable_work);
1736
68542962 1737 /* Disable ARP filtering */
0f19b41e 1738 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1739 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1740
3abead59
JB		 1741 sdata->vif.bss_conf.qos = false;
1742 changed |= BSS_CHANGED_QOS;
1743
0aaffa9b
JB		 1744 /* The BSSID (not really interesting) and HT changed */
1745 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1746 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1747
3abead59
JB		 1748 /* disassociated - set to defaults now */
1749 ieee80211_set_wmm_default(sdata, false);
1750
b9dcf712
JB		 1751 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1752 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1753 del_timer_sync(&sdata->u.mgd.timer);
1754 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1755
1756 sdata->u.mgd.timers_running = 0;
028e8da0 1757
826262c3
JB		 1758 sdata->vif.bss_conf.dtim_period = 0;
1759
028e8da0
JB		 1760 ifmgd->flags = 0;
1761 ieee80211_vif_release_channel(sdata);
aa458d17 1762}
f0706e82 1763
3cf335d5
KV		 1764void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1765 struct ieee80211_hdr *hdr)
1766{
1767 /*
1768 * We can postpone the mgd.timer whenever receiving unicast frames
1769 * from AP because we know that the connection is working both ways
1770 * at that time. But multicast frames (and hence also beacons) must
1771 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1772 * data idle periods for sending the periodic probe request to the
1773 * AP we're connected to.
3cf335d5 1774 */
b291ba11
JB		 1775 if (is_multicast_ether_addr(hdr->addr1))
1776 return;
1777
be099e82 1778 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1779}
f0706e82 1780
4e5ff376
FF		 1781static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1782{
1783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1784 struct ieee80211_local *local = sdata->local;
4e5ff376 1785
133d40f9 1786 mutex_lock(&local->mtx);
4e5ff376 1787 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1788 IEEE80211_STA_CONNECTION_POLL))) {
1789 mutex_unlock(&local->mtx);
1790 return;
1791 }
4e5ff376 1792
925e64c3 1793 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1794
1795 mutex_lock(&local->iflist_mtx);
1796 ieee80211_recalc_ps(local, -1);
1797 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1798
1799 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1800 goto out;
4e5ff376
FF		 1801
1802 /*
1803 * We've received a probe response, but are not sure whether
1804 * we have or will be receiving any beacons or data, so let's
1805 * schedule the timers again, just in case.
1806 */
1807 ieee80211_sta_reset_beacon_monitor(sdata);
1808
1809 mod_timer(&ifmgd->conn_mon_timer,
1810 round_jiffies_up(jiffies +
1811 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1812out:
133d40f9 1813 mutex_unlock(&local->mtx);
4e5ff376
FF		 1814}
1815
1816void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1817 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1818{
75706d0e 1819 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1820 return;
1821
4e5ff376
FF		 1822 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1823 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1824 if (ack)
cab1c7fd 1825 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1826 else
1827 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1828 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1829 return;
4e5ff376 1830 }
cab1c7fd
WD		 1831
1832 if (ack)
1833 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1834}
1835
a43abf29
ML		 1836static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1837{
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1839 const u8 *ssid;
f01a067d 1840 u8 *dst = ifmgd->associated->bssid;
180205bd 1841 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1842
1843 /*
1844 * Try sending broadcast probe requests for the last three
1845 * probe requests after the first ones failed since some
1846 * buggy APs only support broadcast probe requests.
1847 */
1848 if (ifmgd->probe_send_count >= unicast_limit)
1849 dst = NULL;
a43abf29 1850
4e5ff376
FF		 1851 /*
1852 * When the hardware reports an accurate Tx ACK status, it's
1853 * better to send a nullfunc frame instead of a probe request,
1854 * as it will kick us off the AP quickly if we aren't associated
1855 * anymore. The timeout will be reset if the frame is ACKed by
1856 * the AP.
1857 */
992e68bf
SD		 1858 ifmgd->probe_send_count++;
1859
04ac3c0e
FF		 1860 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1861 ifmgd->nullfunc_failed = false;
4e5ff376 1862 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1863 } else {
88c868c4
SG		 1864 int ssid_len;
1865
9caf0364 1866 rcu_read_lock();
4e5ff376 1867 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1868 if (WARN_ON_ONCE(ssid == NULL))
1869 ssid_len = 0;
1870 else
1871 ssid_len = ssid[1];
1872
1873 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1874 0, (u32) -1, true, 0,
55de908a 1875 ifmgd->associated->channel, false);
9caf0364 1876 rcu_read_unlock();
4e5ff376 1877 }
a43abf29 1878
180205bd 1879 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1880 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1881 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1882 drv_flush(sdata->local, false);
a43abf29
ML		 1883}
1884
b291ba11
JB		 1885static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1886 bool beacon)
04de8381 1887{
04de8381 1888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1889 bool already = false;
34bfc411 1890
9607e6b6 1891 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1892 return;
1893
77fdaa12
JB		 1894 mutex_lock(&ifmgd->mtx);
1895
1896 if (!ifmgd->associated)
1897 goto out;
1898
133d40f9
SG		 1899 mutex_lock(&sdata->local->mtx);
1900
1901 if (sdata->local->tmp_channel || sdata->local->scanning) {
1902 mutex_unlock(&sdata->local->mtx);
1903 goto out;
1904 }
1905
e87cc472 1906 if (beacon)
bdcbd8e0 1907 mlme_dbg_ratelimited(sdata,
112c31f0 1908 "detected beacon loss from AP - probing\n");
bdcbd8e0 1909
6efb71b0
HS		 1910 ieee80211_cqm_rssi_notify(&sdata->vif,
1911 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1912
b291ba11
JB		 1913 /*
1914 * The driver/our work has already reported this event or the
1915 * connection monitoring has kicked in and we have already sent
1916 * a probe request. Or maybe the AP died and the driver keeps
1917 * reporting until we disassociate...
1918 *
1919 * In either case we have to ignore the current call to this
1920 * function (except for setting the correct probe reason bit)
1921 * because otherwise we would reset the timer every time and
1922 * never check whether we received a probe response!
1923 */
1924 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1925 IEEE80211_STA_CONNECTION_POLL))
1926 already = true;
1927
1928 if (beacon)
1929 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1930 else
1931 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1932
133d40f9
SG		 1933 mutex_unlock(&sdata->local->mtx);
1934
b291ba11
JB		 1935 if (already)
1936 goto out;
1937
4e751843
JB		 1938 mutex_lock(&sdata->local->iflist_mtx);
1939 ieee80211_recalc_ps(sdata->local, -1);
1940 mutex_unlock(&sdata->local->iflist_mtx);
1941
a43abf29
ML		 1942 ifmgd->probe_send_count = 0;
1943 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1944 out:
1945 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1946}
1947
a619a4c0
JO		 1948struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1949 struct ieee80211_vif *vif)
1950{
1951 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1952 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1953 struct cfg80211_bss *cbss;
a619a4c0
JO		 1954 struct sk_buff *skb;
1955 const u8 *ssid;
88c868c4 1956 int ssid_len;
a619a4c0
JO		 1957
1958 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1959 return NULL;
1960
1961 ASSERT_MGD_MTX(ifmgd);
1962
d9b3b28b
EP		 1963 if (ifmgd->associated)
1964 cbss = ifmgd->associated;
1965 else if (ifmgd->auth_data)
1966 cbss = ifmgd->auth_data->bss;
1967 else if (ifmgd->assoc_data)
1968 cbss = ifmgd->assoc_data->bss;
1969 else
a619a4c0
JO		 1970 return NULL;
1971
9caf0364 1972 rcu_read_lock();
d9b3b28b 1973 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1974 if (WARN_ON_ONCE(ssid == NULL))
1975 ssid_len = 0;
1976 else
1977 ssid_len = ssid[1];
1978
d9b3b28b 1979 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1980 (u32) -1, cbss->channel,
6b77863b 1981 ssid + 2, ssid_len,
85a237fe 1982 NULL, 0, true);
9caf0364 1983 rcu_read_unlock();
a619a4c0
JO		 1984
1985 return skb;
1986}
1987EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1988
eef9e54c 1989static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1990{
1991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1992 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1993
1994 mutex_lock(&ifmgd->mtx);
1995 if (!ifmgd->associated) {
1996 mutex_unlock(&ifmgd->mtx);
1997 return;
1998 }
1999
37ad3888
JB		 2000 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2002 true, frame_buf);
882a7c69 2003 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 2004 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2005 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2006 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2007
1e4dcd01
JO		 2008 /*
2009 * must be outside lock due to cfg80211,
2010 * but that's not a problem.
2011 */
6ae16775 2012 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2013}
2014
cc74c0c7 2015static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2016{
2017 struct ieee80211_sub_if_data *sdata =
2018 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2019 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2021 struct sta_info *sta;
2022
2023 if (ifmgd->associated) {
30fa9047 2024 rcu_read_lock();
a85e1d55
PS		 2025 sta = sta_info_get(sdata, ifmgd->bssid);
2026 if (sta)
2027 sta->beacon_loss_count++;
30fa9047 2028 rcu_read_unlock();
a85e1d55 2029 }
b291ba11 2030
682bd38b 2031 if (ifmgd->connection_loss) {
882a7c69
JB		 2032 sdata_info(sdata, "Connection to AP %pM lost\n",
2033 ifmgd->bssid);
eef9e54c 2034 __ieee80211_disconnect(sdata);
882a7c69 2035 } else {
1e4dcd01 2036 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2037 }
2038}
2039
2040static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2041{
2042 struct ieee80211_sub_if_data *sdata =
2043 container_of(work, struct ieee80211_sub_if_data,
2044 u.mgd.csa_connection_drop_work);
2045
eef9e54c 2046 __ieee80211_disconnect(sdata);
b291ba11
JB		 2047}
2048
04de8381
KV		 2049void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2050{
2051 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2052 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2053
b5878a2d
JB		 2054 trace_api_beacon_loss(sdata);
2055
1e4dcd01 2056 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2057 sdata->u.mgd.connection_loss = false;
1e4dcd01 2058 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2059}
2060EXPORT_SYMBOL(ieee80211_beacon_loss);
2061
1e4dcd01
JO		 2062void ieee80211_connection_loss(struct ieee80211_vif *vif)
2063{
2064 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2065 struct ieee80211_hw *hw = &sdata->local->hw;
2066
b5878a2d
JB		 2067 trace_api_connection_loss(sdata);
2068
682bd38b 2069 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2070 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2071}
2072EXPORT_SYMBOL(ieee80211_connection_loss);
2073
2074
66e67e41
JB		 2075static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2076 bool assoc)
2077{
2078 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2079
2080 lockdep_assert_held(&sdata->u.mgd.mtx);
2081
66e67e41
JB		 2082 if (!assoc) {
2083 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2084
2085 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2086 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2087 sdata->u.mgd.flags = 0;
55de908a 2088 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2089 }
2090
5b112d3d 2091 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2092 kfree(auth_data);
2093 sdata->u.mgd.auth_data = NULL;
2094}
2095
2096static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2097 struct ieee80211_mgmt *mgmt, size_t len)
2098{
1672c0e3 2099 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2100 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2101 u8 *pos;
2102 struct ieee802_11_elems elems;
1672c0e3 2103 u32 tx_flags = 0;
66e67e41
JB		 2104
2105 pos = mgmt->u.auth.variable;
2106 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2107 if (!elems.challenge)
2108 return;
2109 auth_data->expected_transaction = 4;
a1845fc7 2110 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2111 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2112 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2113 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2114 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2115 elems.challenge - 2, elems.challenge_len + 2,
2116 auth_data->bss->bssid, auth_data->bss->bssid,
2117 auth_data->key, auth_data->key_len,
1672c0e3 2118 auth_data->key_idx, tx_flags);
66e67e41
JB		 2119}
2120
2121static enum rx_mgmt_action __must_check
2122ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2123 struct ieee80211_mgmt *mgmt, size_t len)
2124{
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2126 u8 bssid[ETH_ALEN];
2127 u16 auth_alg, auth_transaction, status_code;
2128 struct sta_info *sta;
2129
2130 lockdep_assert_held(&ifmgd->mtx);
2131
2132 if (len < 24 + 6)
2133 return RX_MGMT_NONE;
2134
2135 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2136 return RX_MGMT_NONE;
2137
2138 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2139
b203ca39 2140 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2141 return RX_MGMT_NONE;
2142
2143 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2144 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2145 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2146
2147 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2148 auth_transaction != ifmgd->auth_data->expected_transaction) {
2149 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2150 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2151 auth_transaction,
2152 ifmgd->auth_data->expected_transaction);
66e67e41 2153 return RX_MGMT_NONE;
0f4126e8 2154 }
66e67e41
JB		 2155
2156 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2157 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2158 mgmt->sa, status_code);
dac211ec
EP		 2159 ieee80211_destroy_auth_data(sdata, false);
2160 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2161 }
2162
2163 switch (ifmgd->auth_data->algorithm) {
2164 case WLAN_AUTH_OPEN:
2165 case WLAN_AUTH_LEAP:
2166 case WLAN_AUTH_FT:
6b8ece3a 2167 case WLAN_AUTH_SAE:
66e67e41
JB		 2168 break;
2169 case WLAN_AUTH_SHARED_KEY:
2170 if (ifmgd->auth_data->expected_transaction != 4) {
2171 ieee80211_auth_challenge(sdata, mgmt, len);
2172 /* need another frame */
2173 return RX_MGMT_NONE;
2174 }
2175 break;
2176 default:
2177 WARN_ONCE(1, "invalid auth alg %d",
2178 ifmgd->auth_data->algorithm);
2179 return RX_MGMT_NONE;
2180 }
2181
bdcbd8e0 2182 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2183 ifmgd->auth_data->done = true;
2184 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2185 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2186 run_again(ifmgd, ifmgd->auth_data->timeout);
2187
6b8ece3a
JM		 2188 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2189 ifmgd->auth_data->expected_transaction != 2) {
2190 /*
2191 * Report auth frame to user space for processing since another
2192 * round of Authentication frames is still needed.
2193 */
2194 return RX_MGMT_CFG80211_RX_AUTH;
2195 }
2196
66e67e41
JB		 2197 /* move station state to auth */
2198 mutex_lock(&sdata->local->sta_mtx);
2199 sta = sta_info_get(sdata, bssid);
2200 if (!sta) {
2201 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2202 goto out_err;
2203 }
2204 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2205 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2206 goto out_err;
2207 }
2208 mutex_unlock(&sdata->local->sta_mtx);
2209
2210 return RX_MGMT_CFG80211_RX_AUTH;
2211 out_err:
2212 mutex_unlock(&sdata->local->sta_mtx);
2213 /* ignore frame -- wait for timeout */
2214 return RX_MGMT_NONE;
2215}
2216
2217
77fdaa12
JB		 2218static enum rx_mgmt_action __must_check
2219ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2220 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2221{
46900298 2222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2223 const u8 *bssid = NULL;
f0706e82
JB		 2224 u16 reason_code;
2225
66e67e41
JB		 2226 lockdep_assert_held(&ifmgd->mtx);
2227
f4ea83dd 2228 if (len < 24 + 2)
77fdaa12 2229 return RX_MGMT_NONE;
f0706e82 2230
66e67e41 2231 if (!ifmgd->associated ||
b203ca39 2232 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2233 return RX_MGMT_NONE;
77fdaa12 2234
0c1ad2ca 2235 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2236
2237 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2238
bdcbd8e0
JB		 2239 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2240 bssid, reason_code);
77fdaa12 2241
37ad3888
JB		 2242 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2243
77fdaa12 2244 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2245}
2246
2247
77fdaa12
JB		 2248static enum rx_mgmt_action __must_check
2249ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2250 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2251{
46900298 2252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2253 u16 reason_code;
2254
66e67e41 2255 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2256
66e67e41 2257 if (len < 24 + 2)
77fdaa12
JB		 2258 return RX_MGMT_NONE;
2259
66e67e41 2260 if (!ifmgd->associated ||
b203ca39 2261 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2262 return RX_MGMT_NONE;
f0706e82
JB		 2263
2264 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2265
bdcbd8e0
JB		 2266 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2267 mgmt->sa, reason_code);
f0706e82 2268
37ad3888
JB		 2269 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2270
77fdaa12 2271 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2272}
2273
c74d084f
CL		 2274static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2275 u8 *supp_rates, unsigned int supp_rates_len,
2276 u32 *rates, u32 *basic_rates,
2277 bool *have_higher_than_11mbit,
2278 int *min_rate, int *min_rate_index)
2279{
2280 int i, j;
2281
2282 for (i = 0; i < supp_rates_len; i++) {
2283 int rate = (supp_rates[i] & 0x7f) * 5;
2284 bool is_basic = !!(supp_rates[i] & 0x80);
2285
2286 if (rate > 110)
2287 *have_higher_than_11mbit = true;
2288
2289 /*
2290 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2291 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2292 *
2293 * Note: Even through the membership selector and the basic
2294 * rate flag share the same bit, they are not exactly
2295 * the same.
2296 */
2297 if (!!(supp_rates[i] & 0x80) &&
2298 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2299 continue;
2300
2301 for (j = 0; j < sband->n_bitrates; j++) {
2302 if (sband->bitrates[j].bitrate == rate) {
2303 *rates |= BIT(j);
2304 if (is_basic)
2305 *basic_rates |= BIT(j);
2306 if (rate < *min_rate) {
2307 *min_rate = rate;
2308 *min_rate_index = j;
2309 }
2310 break;
2311 }
2312 }
2313 }
2314}
f0706e82 2315
66e67e41
JB		 2316static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2317 bool assoc)
2318{
2319 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2320
2321 lockdep_assert_held(&sdata->u.mgd.mtx);
2322
66e67e41
JB		 2323 if (!assoc) {
2324 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2325
2326 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2327 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2328 sdata->u.mgd.flags = 0;
55de908a 2329 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2330 }
2331
2332 kfree(assoc_data);
2333 sdata->u.mgd.assoc_data = NULL;
2334}
2335
2336static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2337 struct cfg80211_bss *cbss,
af6b6374 2338 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2339{
46900298 2340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2341 struct ieee80211_local *local = sdata->local;
8318d78a 2342 struct ieee80211_supported_band *sband;
f0706e82 2343 struct sta_info *sta;
af6b6374 2344 u8 *pos;
af6b6374 2345 u16 capab_info, aid;
f0706e82 2346 struct ieee802_11_elems elems;
bda3933a 2347 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2348 u32 changed = 0;
c74d084f 2349 int err;
f0706e82 2350
af6b6374 2351 /* AssocResp and ReassocResp have identical structure */
f0706e82 2352
f0706e82 2353 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2354 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2355
1dd84aa2 2356 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2357 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2358 aid);
1dd84aa2
JB		 2359 aid &= ~(BIT(15) | BIT(14));
2360
05cb9108
JB		 2361 ifmgd->broken_ap = false;
2362
2363 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2364 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2365 aid);
05cb9108
JB		 2366 aid = 0;
2367 ifmgd->broken_ap = true;
2368 }
2369
af6b6374
JB		 2370 pos = mgmt->u.assoc_resp.variable;
2371 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2372
f0706e82 2373 if (!elems.supp_rates) {
bdcbd8e0 2374 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2375 return false;
f0706e82
JB		 2376 }
2377
46900298 2378 ifmgd->aid = aid;
f0706e82 2379
2a33bee2
GE		 2380 mutex_lock(&sdata->local->sta_mtx);
2381 /*
2382 * station info was already allocated and inserted before
2383 * the association and should be available to us
2384 */
7852e361 2385 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2386 if (WARN_ON(!sta)) {
2387 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2388 return false;
77fdaa12 2389 }
05e5e883 2390
55de908a 2391 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2392
a8243b72 2393 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2394 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2395 elems.ht_cap_elem, sta);
64f68e5d 2396
818255ea
MP		 2397 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2398 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2399 elems.vht_cap_elem, sta);
818255ea 2400
1128958d
JB		 2401 if (elems.ht_operation && elems.wmm_param &&
2402 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2403 changed |= ieee80211_config_ht_tx(sdata, sta,
2404 elems.ht_operation,
2405 cbss->bssid, false);
2406
bee7f586
JB		 2407 /*
2408 * If an operating mode notification IE is present, override the
2409 * NSS calculation (that would be done in rate_control_rate_init())
2410 * and use the # of streams from that element.
2411 */
2412 if (elems.opmode_notif &&
2413 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2414 u8 nss;
2415
2416 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2417 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2418 nss += 1;
2419 sta->sta.rx_nss = nss;
2420 }
2421
4b7679a5 2422 rate_control_rate_init(sta);
f0706e82 2423
46900298 2424 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2425 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2426
ddf4ac53 2427 if (elems.wmm_param)
c2c98fde 2428 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2429
3e4d40fa 2430 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2431 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2432 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2433 if (err) {
bdcbd8e0
JB		 2434 sdata_info(sdata,
2435 "failed to move station %pM to desired state\n",
2436 sta->sta.addr);
c8987876
JB		 2437 WARN_ON(__sta_info_destroy(sta));
2438 mutex_unlock(&sdata->local->sta_mtx);
2439 return false;
2440 }
2441
7852e361 2442 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2443
f2176d72
JO		 2444 /*
2445 * Always handle WMM once after association regardless
2446 * of the first value the AP uses. Setting -1 here has
2447 * that effect because the AP values is an unsigned
2448 * 4-bit value.
2449 */
2450 ifmgd->wmm_last_param_set = -1;
2451
ddf4ac53 2452 if (elems.wmm_param)
4ced3f74 2453 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2454 elems.wmm_param_len);
aa837e1d 2455 else
3abead59
JB		 2456 ieee80211_set_wmm_default(sdata, false);
2457 changed |= BSS_CHANGED_QOS;
f0706e82 2458
60f8b39c
JB		 2459 /* set AID and assoc capability,
2460 * ieee80211_set_associated() will tell the driver */
2461 bss_conf->aid = aid;
2462 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2463 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2464
d524215f
FF		 2465 /*
2466 * If we're using 4-addr mode, let the AP know that we're
2467 * doing so, so that it can create the STA VLAN on its side
2468 */
2469 if (ifmgd->use_4addr)
2470 ieee80211_send_4addr_nullfunc(local, sdata);
2471
15b7b062 2472 /*
b291ba11
JB		 2473 * Start timer to probe the connection to the AP now.
2474 * Also start the timer that will detect beacon loss.
15b7b062 2475 */
b291ba11 2476 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2477 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2478
af6b6374 2479 return true;
f0706e82
JB		 2480}
2481
66e67e41
JB		 2482static enum rx_mgmt_action __must_check
2483ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2484 struct ieee80211_mgmt *mgmt, size_t len,
2485 struct cfg80211_bss **bss)
2486{
2487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2488 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2489 u16 capab_info, status_code, aid;
2490 struct ieee802_11_elems elems;
2491 u8 *pos;
2492 bool reassoc;
2493
2494 lockdep_assert_held(&ifmgd->mtx);
2495
2496 if (!assoc_data)
2497 return RX_MGMT_NONE;
b203ca39 2498 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2499 return RX_MGMT_NONE;
2500
2501 /*
2502 * AssocResp and ReassocResp have identical structure, so process both
2503 * of them in this function.
2504 */
2505
2506 if (len < 24 + 6)
2507 return RX_MGMT_NONE;
2508
2509 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2510 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2511 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2512 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2513
bdcbd8e0
JB		 2514 sdata_info(sdata,
2515 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2516 reassoc ? "Rea" : "A", mgmt->sa,
2517 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2518
2519 pos = mgmt->u.assoc_resp.variable;
2520 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2521
2522 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2523 elems.timeout_int && elems.timeout_int_len == 5 &&
2524 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2525 u32 tu, ms;
2526 tu = get_unaligned_le32(elems.timeout_int + 1);
2527 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2528 sdata_info(sdata,
2529 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2530 mgmt->sa, tu, ms);
66e67e41 2531 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2532 assoc_data->timeout_started = true;
66e67e41
JB		 2533 if (ms > IEEE80211_ASSOC_TIMEOUT)
2534 run_again(ifmgd, assoc_data->timeout);
2535 return RX_MGMT_NONE;
2536 }
2537
2538 *bss = assoc_data->bss;
2539
2540 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2541 sdata_info(sdata, "%pM denied association (code=%d)\n",
2542 mgmt->sa, status_code);
66e67e41
JB		 2543 ieee80211_destroy_assoc_data(sdata, false);
2544 } else {
66e67e41
JB		 2545 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2546 /* oops -- internal error -- send timeout for now */
10a9109f 2547 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2548 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2549 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2550 }
635d999f 2551 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2552
2553 /*
2554 * destroy assoc_data afterwards, as otherwise an idle
2555 * recalc after assoc_data is NULL but before associated
2556 * is set can cause the interface to go idle
2557 */
2558 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2559 }
2560
2561 return RX_MGMT_CFG80211_RX_ASSOC;
2562}
8e3c1b77 2563
98c8fccf 2564static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2565 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2566 struct ieee80211_rx_status *rx_status,
d45c4172 2567 struct ieee802_11_elems *elems)
98c8fccf
JB		 2568{
2569 struct ieee80211_local *local = sdata->local;
2570 int freq;
c2b13452 2571 struct ieee80211_bss *bss;
98c8fccf 2572 struct ieee80211_channel *channel;
56007a02
JB		 2573 bool need_ps = false;
2574
826262c3
JB		 2575 if ((sdata->u.mgd.associated &&
2576 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2577 (sdata->u.mgd.assoc_data &&
2578 ether_addr_equal(mgmt->bssid,
2579 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2580 /* not previously set so we may need to recalc */
826262c3
JB		 2581 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2582
2583 if (elems->tim && !elems->parse_error) {
2584 struct ieee80211_tim_ie *tim_ie = elems->tim;
2585 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2586 }
56007a02 2587 }
98c8fccf
JB		 2588
2589 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2590 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2591 rx_status->band);
98c8fccf
JB		 2592 else
2593 freq = rx_status->freq;
2594
2595 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2596
2597 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2598 return;
2599
98c8fccf 2600 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2601 channel);
77fdaa12
JB		 2602 if (bss)
2603 ieee80211_rx_bss_put(local, bss);
2604
2605 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2606 return;
2607
56007a02
JB		 2608 if (need_ps) {
2609 mutex_lock(&local->iflist_mtx);
2610 ieee80211_recalc_ps(local, -1);
2611 mutex_unlock(&local->iflist_mtx);
2612 }
2613
5bc1420b
JB		 2614 if (elems->ch_switch_ie &&
2615 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2616 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2617 bss, rx_status->mactime);
f0706e82
JB		 2618}
2619
2620
f698d856 2621static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2622 struct sk_buff *skb)
f0706e82 2623{
af6b6374 2624 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2625 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2626 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2627 size_t baselen, len = skb->len;
ae6a44e3
EK		 2628 struct ieee802_11_elems elems;
2629
15b7b062
KV		 2630 ifmgd = &sdata->u.mgd;
2631
77fdaa12
JB		 2632 ASSERT_MGD_MTX(ifmgd);
2633
b203ca39 2634 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2635 return; /* ignore ProbeResp to foreign address */
2636
ae6a44e3
EK		 2637 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2638 if (baselen > len)
2639 return;
2640
2641 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2642 &elems);
2643
d45c4172 2644 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2645
77fdaa12 2646 if (ifmgd->associated &&
b203ca39 2647 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2648 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2649
2650 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2651 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2652 /* got probe response, continue with auth */
bdcbd8e0 2653 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2654 ifmgd->auth_data->tries = 0;
2655 ifmgd->auth_data->timeout = jiffies;
89afe614 2656 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2657 run_again(ifmgd, ifmgd->auth_data->timeout);
2658 }
f0706e82
JB		 2659}
2660
d91f36db
JB		 2661/*
2662 * This is the canonical list of information elements we care about,
2663 * the filter code also gives us all changes to the Microsoft OUI
2664 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2665 *
2666 * We implement beacon filtering in software since that means we can
2667 * avoid processing the frame here and in cfg80211, and userspace
2668 * will not be able to tell whether the hardware supports it or not.
2669 *
2670 * XXX: This list needs to be dynamic -- userspace needs to be able to
2671 * add items it requires. It also needs to be able to tell us to
2672 * look out for other vendor IEs.
2673 */
2674static const u64 care_about_ies =
1d4df3a5
JB		 2675 (1ULL << WLAN_EID_COUNTRY) |
2676 (1ULL << WLAN_EID_ERP_INFO) |
2677 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2678 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2679 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2680 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2681
f698d856 2682static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2683 struct ieee80211_mgmt *mgmt,
2684 size_t len,
2685 struct ieee80211_rx_status *rx_status)
2686{
d91f36db 2687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2688 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2689 size_t baselen;
2690 struct ieee802_11_elems elems;
f698d856 2691 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2692 struct ieee80211_chanctx_conf *chanctx_conf;
2693 struct ieee80211_channel *chan;
bee7f586 2694 struct sta_info *sta;
471b3efd 2695 u32 changed = 0;
f87ad637 2696 bool erp_valid;
7a5158ef 2697 u8 erp_value = 0;
d91f36db 2698 u32 ncrc;
77fdaa12
JB		 2699 u8 *bssid;
2700
66e67e41 2701 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2702
ae6a44e3
EK		 2703 /* Process beacon from the current BSS */
2704 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2705 if (baselen > len)
2706 return;
2707
55de908a
JB		 2708 rcu_read_lock();
2709 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2710 if (!chanctx_conf) {
2711 rcu_read_unlock();
f0706e82 2712 return;
55de908a
JB		 2713 }
2714
4bf88530 2715 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2716 rcu_read_unlock();
2717 return;
2718 }
4bf88530 2719 chan = chanctx_conf->def.chan;
55de908a 2720 rcu_read_unlock();
f0706e82 2721
c65dd147 2722 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2723 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2724 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2725 len - baselen, &elems);
77fdaa12 2726
d45c4172 2727 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2728 ifmgd->assoc_data->have_beacon = true;
c65dd147 2729 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2730 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2731 sdata->vif.bss_conf.sync_tsf =
2732 le64_to_cpu(mgmt->u.beacon.timestamp);
2733 sdata->vif.bss_conf.sync_device_ts =
2734 rx_status->device_timestamp;
2735 if (elems.tim)
2736 sdata->vif.bss_conf.sync_dtim_count =
2737 elems.tim->dtim_count;
2738 else
2739 sdata->vif.bss_conf.sync_dtim_count = 0;
2740 }
66e67e41
JB		 2741 /* continue assoc process */
2742 ifmgd->assoc_data->timeout = jiffies;
89afe614 2743 ifmgd->assoc_data->timeout_started = true;
66e67e41
JB		 2744 run_again(ifmgd, ifmgd->assoc_data->timeout);
2745 return;
2746 }
77fdaa12 2747
66e67e41 2748 if (!ifmgd->associated ||
b203ca39 2749 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2750 return;
66e67e41 2751 bssid = ifmgd->associated->bssid;
f0706e82 2752
17e4ec14
JM		 2753 /* Track average RSSI from the Beacon frames of the current AP */
2754 ifmgd->last_beacon_signal = rx_status->signal;
2755 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2756 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2757 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2758 ifmgd->last_cqm_event_signal = 0;
391a200a 2759 ifmgd->count_beacon_signal = 1;
615f7b9b 2760 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2761 } else {
2762 ifmgd->ave_beacon_signal =
2763 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2764 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2765 ifmgd->ave_beacon_signal) / 16;
391a200a 2766 ifmgd->count_beacon_signal++;
17e4ec14 2767 }
615f7b9b
MV		 2768
2769 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2770 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2771 int sig = ifmgd->ave_beacon_signal;
2772 int last_sig = ifmgd->last_ave_beacon_signal;
2773
2774 /*
2775 * if signal crosses either of the boundaries, invoke callback
2776 * with appropriate parameters
2777 */
2778 if (sig > ifmgd->rssi_max_thold &&
2779 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2780 ifmgd->last_ave_beacon_signal = sig;
887da917 2781 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2782 } else if (sig < ifmgd->rssi_min_thold &&
2783 (last_sig >= ifmgd->rssi_max_thold ||
2784 last_sig == 0)) {
2785 ifmgd->last_ave_beacon_signal = sig;
887da917 2786 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2787 }
2788 }
2789
17e4ec14 2790 if (bss_conf->cqm_rssi_thold &&
391a200a 2791 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2792 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2793 int sig = ifmgd->ave_beacon_signal / 16;
2794 int last_event = ifmgd->last_cqm_event_signal;
2795 int thold = bss_conf->cqm_rssi_thold;
2796 int hyst = bss_conf->cqm_rssi_hyst;
2797 if (sig < thold &&
2798 (last_event == 0 || sig < last_event - hyst)) {
2799 ifmgd->last_cqm_event_signal = sig;
2800 ieee80211_cqm_rssi_notify(
2801 &sdata->vif,
2802 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2803 GFP_KERNEL);
2804 } else if (sig > thold &&
2805 (last_event == 0 || sig > last_event + hyst)) {
2806 ifmgd->last_cqm_event_signal = sig;
2807 ieee80211_cqm_rssi_notify(
2808 &sdata->vif,
2809 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2810 GFP_KERNEL);
2811 }
2812 }
2813
b291ba11 2814 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2815 mlme_dbg_ratelimited(sdata,
112c31f0 2816 "cancelling AP probe due to a received beacon\n");
925e64c3 2817 mutex_lock(&local->mtx);
b291ba11 2818 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2819 ieee80211_run_deferred_scan(local);
2820 mutex_unlock(&local->mtx);
2821
4e751843
JB		 2822 mutex_lock(&local->iflist_mtx);
2823 ieee80211_recalc_ps(local, -1);
2824 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2825 }
2826
b291ba11
JB		 2827 /*
2828 * Push the beacon loss detection into the future since
2829 * we are processing a beacon from the AP just now.
2830 */
d3a910a8 2831 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2832
d91f36db
JB		 2833 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2834 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2835 len - baselen, &elems,
2836 care_about_ies, ncrc);
2837
25c9c875 2838 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2839 bool directed_tim = ieee80211_check_tim(elems.tim,
2840 elems.tim_len,
2841 ifmgd->aid);
1fb3606b 2842 if (directed_tim) {
572e0012 2843 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2844 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2845 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2846 ieee80211_hw_config(local,
2847 IEEE80211_CONF_CHANGE_PS);
2848 }
572e0012 2849 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2850 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2851 local->pspolling = true;
2852
2853 /*
2854 * Here is assumed that the driver will be
2855 * able to send ps-poll frame and receive a
2856 * response even though power save mode is
2857 * enabled, but some drivers might require
2858 * to disable power save here. This needs
2859 * to be investigated.
2860 */
2861 ieee80211_send_pspoll(local, sdata);
2862 }
a97b77b9
VN		 2863 }
2864 }
7a5158ef 2865
488dd7b5
JB		 2866 if (sdata->vif.p2p) {
2867 u8 noa[2];
2868 int ret;
2869
2870 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2871 len - baselen,
2872 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2873 noa, sizeof(noa));
2874 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2875 bss_conf->p2p_oppps = noa[1] & 0x80;
2876 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2877 changed |= BSS_CHANGED_P2P_PS;
2878 sdata->u.mgd.p2p_noa_index = noa[0];
2879 /*
2880 * make sure we update all information, the CRC
2881 * mechanism doesn't look at P2P attributes.
2882 */
2883 ifmgd->beacon_crc_valid = false;
2884 }
2885 }
2886
d8ec4433 2887 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2888 return;
2889 ifmgd->beacon_crc = ncrc;
d8ec4433 2890 ifmgd->beacon_crc_valid = true;
30196673 2891
d45c4172 2892 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2893
2894 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2895 elems.wmm_param_len))
2896 changed |= BSS_CHANGED_QOS;
2897
c65dd147
EG		 2898 /*
2899 * If we haven't had a beacon before, tell the driver about the
ef429dad 2900 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2901 */
2902 if (!bss_conf->dtim_period) {
2903 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2904 if (elems.tim)
2905 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2906 else
2907 bss_conf->dtim_period = 1;
ef429dad
JB		 2908
2909 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2910 sdata->vif.bss_conf.sync_tsf =
2911 le64_to_cpu(mgmt->u.beacon.timestamp);
2912 sdata->vif.bss_conf.sync_device_ts =
2913 rx_status->device_timestamp;
2914 if (elems.tim)
2915 sdata->vif.bss_conf.sync_dtim_count =
2916 elems.tim->dtim_count;
2917 else
2918 sdata->vif.bss_conf.sync_dtim_count = 0;
2919 }
2920
c65dd147
EG		 2921 changed |= BSS_CHANGED_DTIM_PERIOD;
2922 }
2923
7a5158ef
JB		 2924 if (elems.erp_info && elems.erp_info_len >= 1) {
2925 erp_valid = true;
2926 erp_value = elems.erp_info[0];
2927 } else {
2928 erp_valid = false;
50c4afb9 2929 }
7a5158ef
JB		 2930 changed |= ieee80211_handle_bss_capability(sdata,
2931 le16_to_cpu(mgmt->u.beacon.capab_info),
2932 erp_valid, erp_value);
f0706e82 2933
1128958d 2934 mutex_lock(&local->sta_mtx);
bee7f586
JB		 2935 sta = sta_info_get(sdata, bssid);
2936
074d46d1 2937 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2938 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
bee7f586 2939 changed |= ieee80211_config_ht_tx(sdata, sta,
1128958d 2940 elems.ht_operation,
24398e39 2941 bssid, true);
bee7f586
JB		 2942
2943 if (sta && elems.opmode_notif)
2944 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
2945 rx_status->band, true);
1128958d 2946 mutex_unlock(&local->sta_mtx);
d3c990fb 2947
04b7b2ff
JB		 2948 if (elems.country_elem && elems.pwr_constr_elem &&
2949 mgmt->u.probe_resp.capab_info &
2950 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2951 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2952 elems.country_elem,
2953 elems.country_elem_len,
2954 elems.pwr_constr_elem);
3f2355cb 2955
471b3efd 2956 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2957}
2958
1fa57d01
JB		 2959void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2960 struct sk_buff *skb)
f0706e82 2961{
77fdaa12 2962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2963 struct ieee80211_rx_status *rx_status;
f0706e82 2964 struct ieee80211_mgmt *mgmt;
66e67e41 2965 struct cfg80211_bss *bss = NULL;
77fdaa12 2966 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2967 u16 fc;
2968
f0706e82
JB		 2969 rx_status = (struct ieee80211_rx_status *) skb->cb;
2970 mgmt = (struct ieee80211_mgmt *) skb->data;
2971 fc = le16_to_cpu(mgmt->frame_control);
2972
77fdaa12
JB		 2973 mutex_lock(&ifmgd->mtx);
2974
66e67e41
JB		 2975 switch (fc & IEEE80211_FCTL_STYPE) {
2976 case IEEE80211_STYPE_BEACON:
2977 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2978 break;
2979 case IEEE80211_STYPE_PROBE_RESP:
2980 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2981 break;
2982 case IEEE80211_STYPE_AUTH:
2983 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2984 break;
2985 case IEEE80211_STYPE_DEAUTH:
2986 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2987 break;
2988 case IEEE80211_STYPE_DISASSOC:
2989 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2990 break;
2991 case IEEE80211_STYPE_ASSOC_RESP:
2992 case IEEE80211_STYPE_REASSOC_RESP:
2993 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2994 break;
2995 case IEEE80211_STYPE_ACTION:
2996 switch (mgmt->u.action.category) {
2997 case WLAN_CATEGORY_SPECTRUM_MGMT:
2998 ieee80211_sta_process_chanswitch(sdata,
2999 &mgmt->u.action.u.chan_switch.sw_elem,
3000 (void *)ifmgd->associated->priv,
3001 rx_status->mactime);
77fdaa12 3002 break;
77fdaa12 3003 }
77fdaa12 3004 }
77fdaa12
JB		 3005 mutex_unlock(&ifmgd->mtx);
3006
66e67e41
JB		 3007 switch (rma) {
3008 case RX_MGMT_NONE:
3009 /* no action */
3010 break;
3011 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3012 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3013 break;
3014 case RX_MGMT_CFG80211_DISASSOC:
3015 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3016 break;
3017 case RX_MGMT_CFG80211_RX_AUTH:
3018 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3019 break;
3020 case RX_MGMT_CFG80211_RX_ASSOC:
3021 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3022 break;
3023 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3024 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3025 break;
3026 default:
3027 WARN(1, "unexpected: %d", rma);
b054b747 3028 }
f0706e82
JB		 3029}
3030
9c6bd790 3031static void ieee80211_sta_timer(unsigned long data)
f0706e82 3032{
60f8b39c
JB		 3033 struct ieee80211_sub_if_data *sdata =
3034 (struct ieee80211_sub_if_data *) data;
46900298 3035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 3036 struct ieee80211_local *local = sdata->local;
f0706e82 3037
5bb644a0
JB		 3038 if (local->quiescing) {
3039 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3040 return;
3041 }
3042
64592c8f 3043 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 3044}
3045
04ac3c0e 3046static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3047 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3048{
04ac3c0e 3049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3050 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3051
37ad3888 3052 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3053 tx, frame_buf);
04ac3c0e 3054 mutex_unlock(&ifmgd->mtx);
37ad3888 3055
04ac3c0e
FF		 3056 /*
3057 * must be outside lock due to cfg80211,
3058 * but that's not a problem.
3059 */
6ae16775 3060 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3061
04ac3c0e
FF		 3062 mutex_lock(&ifmgd->mtx);
3063}
3064
66e67e41
JB		 3065static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3066{
3067 struct ieee80211_local *local = sdata->local;
3068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3069 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3070 u32 tx_flags = 0;
66e67e41
JB		 3071
3072 lockdep_assert_held(&ifmgd->mtx);
3073
3074 if (WARN_ON_ONCE(!auth_data))
3075 return -EINVAL;
3076
1672c0e3
JB		 3077 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3078 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3079 IEEE80211_TX_INTFL_MLME_CONN_TX;
3080
66e67e41
JB		 3081 auth_data->tries++;
3082
3083 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3084 sdata_info(sdata, "authentication with %pM timed out\n",
3085 auth_data->bss->bssid);
66e67e41
JB		 3086
3087 /*
3088 * Most likely AP is not in the range so remove the
3089 * bss struct for that AP.
3090 */
3091 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3092
3093 return -ETIMEDOUT;
3094 }
3095
a1845fc7
JB		 3096 drv_mgd_prepare_tx(local, sdata);
3097
66e67e41 3098 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3099 u16 trans = 1;
3100 u16 status = 0;
3101
bdcbd8e0
JB		 3102 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3103 auth_data->bss->bssid, auth_data->tries,
3104 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3105
3106 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3107
3108 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3109 trans = auth_data->sae_trans;
3110 status = auth_data->sae_status;
3111 auth_data->expected_transaction = trans;
3112 }
3113
3114 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3115 auth_data->data, auth_data->data_len,
66e67e41 3116 auth_data->bss->bssid,
1672c0e3
JB		 3117 auth_data->bss->bssid, NULL, 0, 0,
3118 tx_flags);
66e67e41
JB		 3119 } else {
3120 const u8 *ssidie;
3121
bdcbd8e0
JB		 3122 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3123 auth_data->bss->bssid, auth_data->tries,
3124 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3125
9caf0364 3126 rcu_read_lock();
66e67e41 3127 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3128 if (!ssidie) {
3129 rcu_read_unlock();
66e67e41 3130 return -EINVAL;
9caf0364 3131 }
66e67e41
JB		 3132 /*
3133 * Direct probe is sent to broadcast address as some APs
3134 * will not answer to direct packet in unassociated state.
3135 */
3136 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3137 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3138 auth_data->bss->channel, false);
9caf0364 3139 rcu_read_unlock();
66e67e41
JB		 3140 }
3141
1672c0e3
JB		 3142 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3143 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3144 ifmgd->auth_data->timeout_started = true;
1672c0e3 3145 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3146 } else {
3147 auth_data->timeout_started = false;
1672c0e3 3148 }
66e67e41
JB		 3149
3150 return 0;
3151}
3152
3153static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3154{
3155 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3156 struct ieee80211_local *local = sdata->local;
3157
3158 lockdep_assert_held(&sdata->u.mgd.mtx);
3159
66e67e41
JB		 3160 assoc_data->tries++;
3161 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3162 sdata_info(sdata, "association with %pM timed out\n",
3163 assoc_data->bss->bssid);
66e67e41
JB		 3164
3165 /*
3166 * Most likely AP is not in the range so remove the
3167 * bss struct for that AP.
3168 */
3169 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3170
3171 return -ETIMEDOUT;
3172 }
3173
bdcbd8e0
JB		 3174 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3175 assoc_data->bss->bssid, assoc_data->tries,
3176 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3177 ieee80211_send_assoc(sdata);
3178
1672c0e3
JB		 3179 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3180 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3181 assoc_data->timeout_started = true;
1672c0e3 3182 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3183 } else {
3184 assoc_data->timeout_started = false;
1672c0e3 3185 }
66e67e41
JB		 3186
3187 return 0;
3188}
3189
1672c0e3
JB		 3190void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3191 __le16 fc, bool acked)
3192{
3193 struct ieee80211_local *local = sdata->local;
3194
3195 sdata->u.mgd.status_fc = fc;
3196 sdata->u.mgd.status_acked = acked;
3197 sdata->u.mgd.status_received = true;
3198
3199 ieee80211_queue_work(&local->hw, &sdata->work);
3200}
3201
1fa57d01 3202void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3203{
9c6bd790 3204 struct ieee80211_local *local = sdata->local;
1fa57d01 3205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3206
77fdaa12
JB		 3207 mutex_lock(&ifmgd->mtx);
3208
1672c0e3
JB		 3209 if (ifmgd->status_received) {
3210 __le16 fc = ifmgd->status_fc;
3211 bool status_acked = ifmgd->status_acked;
3212
3213 ifmgd->status_received = false;
3214 if (ifmgd->auth_data &&
3215 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3216 if (status_acked) {
3217 ifmgd->auth_data->timeout =
3218 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3219 run_again(ifmgd, ifmgd->auth_data->timeout);
3220 } else {
3221 ifmgd->auth_data->timeout = jiffies - 1;
3222 }
89afe614 3223 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3224 } else if (ifmgd->assoc_data &&
3225 (ieee80211_is_assoc_req(fc) ||
3226 ieee80211_is_reassoc_req(fc))) {
3227 if (status_acked) {
3228 ifmgd->assoc_data->timeout =
3229 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3230 run_again(ifmgd, ifmgd->assoc_data->timeout);
3231 } else {
3232 ifmgd->assoc_data->timeout = jiffies - 1;
3233 }
89afe614 3234 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3235 }
3236 }
3237
89afe614 3238 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3239 time_after(jiffies, ifmgd->auth_data->timeout)) {
3240 if (ifmgd->auth_data->done) {
3241 /*
3242 * ok ... we waited for assoc but userspace didn't,
3243 * so let's just kill the auth data
3244 */
3245 ieee80211_destroy_auth_data(sdata, false);
3246 } else if (ieee80211_probe_auth(sdata)) {
3247 u8 bssid[ETH_ALEN];
3248
3249 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3250
3251 ieee80211_destroy_auth_data(sdata, false);
3252
3253 mutex_unlock(&ifmgd->mtx);
3254 cfg80211_send_auth_timeout(sdata->dev, bssid);
3255 mutex_lock(&ifmgd->mtx);
3256 }
89afe614 3257 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3258 run_again(ifmgd, ifmgd->auth_data->timeout);
3259
89afe614 3260 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3261 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3262 if ((ifmgd->assoc_data->need_beacon &&
3263 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3264 ieee80211_do_assoc(sdata)) {
3265 u8 bssid[ETH_ALEN];
3266
3267 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3268
3269 ieee80211_destroy_assoc_data(sdata, false);
3270
3271 mutex_unlock(&ifmgd->mtx);
3272 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3273 mutex_lock(&ifmgd->mtx);
3274 }
89afe614 3275 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3276 run_again(ifmgd, ifmgd->assoc_data->timeout);
3277
b291ba11
JB		 3278 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3279 IEEE80211_STA_CONNECTION_POLL) &&
3280 ifmgd->associated) {
a43abf29 3281 u8 bssid[ETH_ALEN];
72a8a3ed 3282 int max_tries;
a43abf29 3283
0c1ad2ca 3284 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3285
72a8a3ed 3286 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3287 max_tries = max_nullfunc_tries;
72a8a3ed 3288 else
180205bd 3289 max_tries = max_probe_tries;
72a8a3ed 3290
4e5ff376
FF		 3291 /* ACK received for nullfunc probing frame */
3292 if (!ifmgd->probe_send_count)
3293 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3294 else if (ifmgd->nullfunc_failed) {
3295 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3296 mlme_dbg(sdata,
3297 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3298 bssid, ifmgd->probe_send_count,
3299 max_tries);
04ac3c0e
FF		 3300 ieee80211_mgd_probe_ap_send(sdata);
3301 } else {
bdcbd8e0
JB		 3302 mlme_dbg(sdata,
3303 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3304 bssid);
95acac61 3305 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3306 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3307 false);
04ac3c0e
FF		 3308 }
3309 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3310 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3311 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3312 mlme_dbg(sdata,
3313 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3314 bssid, probe_wait_ms);
95acac61 3315 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3316 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3317 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3318 mlme_dbg(sdata,
3319 "No probe response from AP %pM after %dms, try %d/%i\n",
3320 bssid, probe_wait_ms,
3321 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3322 ieee80211_mgd_probe_ap_send(sdata);
3323 } else {
b291ba11
JB		 3324 /*
3325 * We actually lost the connection ... or did we?
3326 * Let's make sure!
3327 */
b38afa87
BG		 3328 wiphy_debug(local->hw.wiphy,
3329 "%s: No probe response from AP %pM"
3330 " after %dms, disconnecting.\n",
3331 sdata->name,
180205bd 3332 bssid, probe_wait_ms);
04ac3c0e 3333
95acac61 3334 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3335 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3336 }
3337 }
3338
77fdaa12 3339 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3340}
3341
b291ba11
JB		 3342static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3343{
3344 struct ieee80211_sub_if_data *sdata =
3345 (struct ieee80211_sub_if_data *) data;
3346 struct ieee80211_local *local = sdata->local;
3347
3348 if (local->quiescing)
3349 return;
3350
682bd38b 3351 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3352 ieee80211_queue_work(&sdata->local->hw,
3353 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3354}
3355
3356static void ieee80211_sta_conn_mon_timer(unsigned long data)
3357{
3358 struct ieee80211_sub_if_data *sdata =
3359 (struct ieee80211_sub_if_data *) data;
3360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3361 struct ieee80211_local *local = sdata->local;
3362
3363 if (local->quiescing)
3364 return;
3365
42935eca 3366 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3367}
3368
3369static void ieee80211_sta_monitor_work(struct work_struct *work)
3370{
3371 struct ieee80211_sub_if_data *sdata =
3372 container_of(work, struct ieee80211_sub_if_data,
3373 u.mgd.monitor_work);
3374
3375 ieee80211_mgd_probe_ap(sdata, false);
3376}
3377
9c6bd790
JB		 3378static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3379{
494f1fe5
EP		 3380 u32 flags;
3381
ad935687 3382 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3383 __ieee80211_stop_poll(sdata);
ad935687 3384
b291ba11 3385 /* let's probe the connection once */
494f1fe5
EP		 3386 flags = sdata->local->hw.flags;
3387 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3388 ieee80211_queue_work(&sdata->local->hw,
3389 &sdata->u.mgd.monitor_work);
b291ba11 3390 /* and do all the other regular work too */
64592c8f 3391 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3392 }
9c6bd790 3393}
f0706e82 3394
5bb644a0
JB		 3395#ifdef CONFIG_PM
3396void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3397{
3398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3399
3400 /*
3401 * we need to use atomic bitops for the running bits
3402 * only because both timers might fire at the same
3403 * time -- the code here is properly synchronised.
3404 */
3405
d1f5b7a3
JB		 3406 cancel_work_sync(&ifmgd->request_smps_work);
3407
0ecfe806 3408 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3409 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3410 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3411 if (del_timer_sync(&ifmgd->timer))
3412 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3413
3414 cancel_work_sync(&ifmgd->chswitch_work);
3415 if (del_timer_sync(&ifmgd->chswitch_timer))
3416 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3417
b291ba11
JB		 3418 /* these will just be re-established on connection */
3419 del_timer_sync(&ifmgd->conn_mon_timer);
3420 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3421}
3422
3423void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3424{
3425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3426
782d2673
JB		 3427 mutex_lock(&ifmgd->mtx);
3428 if (!ifmgd->associated) {
3429 mutex_unlock(&ifmgd->mtx);
676b58c2 3430 return;
782d2673 3431 }
676b58c2 3432
95acac61
JB		 3433 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3434 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3435 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3436 ieee80211_sta_connection_lost(sdata,
3437 ifmgd->associated->bssid,
6b684db1
JB		 3438 WLAN_REASON_UNSPECIFIED,
3439 true);
95acac61 3440 mutex_unlock(&ifmgd->mtx);
782d2673 3441 return;
95acac61 3442 }
782d2673 3443 mutex_unlock(&ifmgd->mtx);
95acac61 3444
5bb644a0
JB		 3445 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3446 add_timer(&ifmgd->timer);
3447 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3448 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3449 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3450
3451 mutex_lock(&sdata->local->mtx);
46090979 3452 ieee80211_restart_sta_timer(sdata);
925e64c3 3453 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3454}
3455#endif
3456
9c6bd790
JB		 3457/* interface setup */
3458void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3459{
46900298 3460 struct ieee80211_if_managed *ifmgd;
988c0f72 3461
46900298 3462 ifmgd = &sdata->u.mgd;
b291ba11 3463 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3464 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3465 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3466 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3467 INIT_WORK(&ifmgd->csa_connection_drop_work,
3468 ieee80211_csa_connection_drop_work);
d1f5b7a3 3469 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3470 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3471 (unsigned long) sdata);
b291ba11
JB		 3472 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3473 (unsigned long) sdata);
3474 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3475 (unsigned long) sdata);
46900298 3476 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3477 (unsigned long) sdata);
9c6bd790 3478
ab1faead 3479 ifmgd->flags = 0;
1478acb3 3480 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3481 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3482 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3483
77fdaa12 3484 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3485
3486 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3487 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3488 else
3489 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3490}
3491
77fdaa12
JB		 3492/* scan finished notification */
3493void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3494{
31ee67a1 3495 struct ieee80211_sub_if_data *sdata;
60f8b39c 3496
77fdaa12
JB		 3497 /* Restart STA timers */
3498 rcu_read_lock();
3499 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3500 ieee80211_restart_sta_timer(sdata);
3501 rcu_read_unlock();
3502}
60f8b39c 3503
77fdaa12
JB		 3504int ieee80211_max_network_latency(struct notifier_block *nb,
3505 unsigned long data, void *dummy)
3506{
3507 s32 latency_usec = (s32) data;
3508 struct ieee80211_local *local =
3509 container_of(nb, struct ieee80211_local,
3510 network_latency_notifier);
1fa6f4af 3511
77fdaa12
JB		 3512 mutex_lock(&local->iflist_mtx);
3513 ieee80211_recalc_ps(local, latency_usec);
3514 mutex_unlock(&local->iflist_mtx);
dfe67012 3515
77fdaa12 3516 return 0;
9c6bd790
JB		 3517}
3518
f2d9d270
JB		 3519static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3520 struct cfg80211_bss *cbss)
3521{
3522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3523 const u8 *ht_cap_ie, *vht_cap_ie;
3524 const struct ieee80211_ht_cap *ht_cap;
3525 const struct ieee80211_vht_cap *vht_cap;
3526 u8 chains = 1;
3527
3528 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3529 return chains;
3530
9caf0364 3531 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3532 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3533 ht_cap = (void *)(ht_cap_ie + 2);
3534 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3535 /*
3536 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3537 * "Tx Unequal Modulation Supported" fields.
3538 */
3539 }
3540
3541 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3542 return chains;
3543
9caf0364 3544 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3545 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3546 u8 nss;
3547 u16 tx_mcs_map;
3548
3549 vht_cap = (void *)(vht_cap_ie + 2);
3550 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3551 for (nss = 8; nss > 0; nss--) {
3552 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3553 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3554 break;
3555 }
3556 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3557 chains = max(chains, nss);
3558 }
3559
3560 return chains;
3561}
3562
b17166a7
JB		 3563static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3564 struct cfg80211_bss *cbss)
a1cf775d
JB		 3565{
3566 struct ieee80211_local *local = sdata->local;
3567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3568 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3569 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3570 struct ieee80211_supported_band *sband;
4bf88530 3571 struct cfg80211_chan_def chandef;
f2d9d270 3572 int ret;
a1cf775d 3573
24398e39
JB		 3574 sband = local->hw.wiphy->bands[cbss->channel->band];
3575
f2d9d270
JB		 3576 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3577 IEEE80211_STA_DISABLE_80P80MHZ |
3578 IEEE80211_STA_DISABLE_160MHZ);
3579
9caf0364
JB		 3580 rcu_read_lock();
3581
f2d9d270
JB		 3582 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3583 sband->ht_cap.ht_supported) {
08e6effa 3584 const u8 *ht_oper_ie, *ht_cap;
24398e39 3585
9caf0364 3586 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3587 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3588 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3589
3590 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3591 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3592 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3593 ht_oper = NULL;
3594 }
24398e39
JB		 3595 }
3596
f2d9d270
JB		 3597 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3598 sband->vht_cap.vht_supported) {
08e6effa 3599 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3600
9caf0364
JB		 3601 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3602 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3603 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3604 vht_oper = (void *)(vht_oper_ie + 2);
3605 if (vht_oper && !ht_oper) {
3606 vht_oper = NULL;
bdcbd8e0 3607 sdata_info(sdata,
f2d9d270 3608 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3609 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3610 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3611 }
08e6effa
JB		 3612
3613 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3614 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3615 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3616 vht_oper = NULL;
3617 }
24398e39
JB		 3618 }
3619
f2d9d270
JB		 3620 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3621 cbss->channel,
3622 ht_oper, vht_oper,
3623 &chandef);
04ecd257 3624
f2d9d270
JB		 3625 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3626 local->rx_chains);
24398e39 3627
9caf0364
JB		 3628 rcu_read_unlock();
3629
04ecd257
JB		 3630 /* will change later if needed */
3631 sdata->smps_mode = IEEE80211_SMPS_OFF;
3632
f2d9d270
JB		 3633 /*
3634 * If this fails (possibly due to channel context sharing
3635 * on incompatible channels, e.g. 80+80 and 160 sharing the
3636 * same control channel) try to use a smaller bandwidth.
3637 */
3638 ret = ieee80211_vif_use_channel(sdata, &chandef,
3639 IEEE80211_CHANCTX_SHARED);
d601cd8d 3640 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3641 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3642 ret = ieee80211_vif_use_channel(sdata, &chandef,
3643 IEEE80211_CHANCTX_SHARED);
3644 }
f2d9d270 3645 return ret;
b17166a7
JB		 3646}
3647
3648static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3649 struct cfg80211_bss *cbss, bool assoc)
3650{
3651 struct ieee80211_local *local = sdata->local;
3652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3653 struct ieee80211_bss *bss = (void *)cbss->priv;
3654 struct sta_info *new_sta = NULL;
3655 bool have_sta = false;
3656 int err;
3657
3658 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3659 return -EINVAL;
3660
3661 if (assoc) {
3662 rcu_read_lock();
3663 have_sta = sta_info_get(sdata, cbss->bssid);
3664 rcu_read_unlock();
3665 }
3666
3667 if (!have_sta) {
3668 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3669 if (!new_sta)
3670 return -ENOMEM;
3671 }
3672
13e0c8e3 3673 if (new_sta) {
5d6a1b06
JB		 3674 u32 rates = 0, basic_rates = 0;
3675 bool have_higher_than_11mbit;
3676 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3677 struct ieee80211_supported_band *sband;
8cef2c9d 3678 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3679
3680 sband = local->hw.wiphy->bands[cbss->channel->band];
3681
3682 err = ieee80211_prep_channel(sdata, cbss);
3683 if (err) {
3684 sta_info_free(local, new_sta);
3685 return err;
3686 }
5d6a1b06 3687
5d6a1b06
JB		 3688 ieee80211_get_rates(sband, bss->supp_rates,
3689 bss->supp_rates_len,
3690 &rates, &basic_rates,
3691 &have_higher_than_11mbit,
3692 &min_rate, &min_rate_index);
3693
3694 /*
3695 * This used to be a workaround for basic rates missing
3696 * in the association response frame. Now that we no
3697 * longer use the basic rates from there, it probably
3698 * doesn't happen any more, but keep the workaround so
3699 * in case some *other* APs are buggy in different ways
3700 * we can connect -- with a warning.
3701 */
3702 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3703 sdata_info(sdata,
3704 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3705 basic_rates = BIT(min_rate_index);
3706 }
3707
13e0c8e3 3708 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3709 sdata->vif.bss_conf.basic_rates = basic_rates;
3710
3711 /* cf. IEEE 802.11 9.2.12 */
55de908a 3712 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3713 have_higher_than_11mbit)
3714 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3715 else
3716 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3717
3718 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3719
8c358bcd
JB		 3720 /* set timing information */
3721 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3722 rcu_read_lock();
ef429dad
JB		 3723 ies = rcu_dereference(cbss->beacon_ies);
3724 if (ies) {
3725 const u8 *tim_ie;
3726
3727 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3728 sdata->vif.bss_conf.sync_device_ts =
3729 bss->device_ts_beacon;
3730 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3731 ies->data, ies->len);
3732 if (tim_ie && tim_ie[1] >= 2)
3733 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3734 else
3735 sdata->vif.bss_conf.sync_dtim_count = 0;
3736 } else if (!(local->hw.flags &
3737 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3738 ies = rcu_dereference(cbss->proberesp_ies);
3739 /* must be non-NULL since beacon IEs were NULL */
3740 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3741 sdata->vif.bss_conf.sync_device_ts =
3742 bss->device_ts_presp;
3743 sdata->vif.bss_conf.sync_dtim_count = 0;
3744 } else {
3745 sdata->vif.bss_conf.sync_tsf = 0;
3746 sdata->vif.bss_conf.sync_device_ts = 0;
3747 sdata->vif.bss_conf.sync_dtim_count = 0;
3748 }
8cef2c9d 3749 rcu_read_unlock();
8c358bcd
JB		 3750
3751 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3752 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3753 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3754 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3755
3756 if (assoc)
13e0c8e3 3757 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3758
13e0c8e3
JB		 3759 err = sta_info_insert(new_sta);
3760 new_sta = NULL;
a1cf775d 3761 if (err) {
bdcbd8e0
JB		 3762 sdata_info(sdata,
3763 "failed to insert STA entry for the AP (error %d)\n",
3764 err);
a1cf775d
JB		 3765 return err;
3766 }
3767 } else
b203ca39 3768 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3769
3770 return 0;
3771}
3772
77fdaa12
JB		 3773/* config hooks */
3774int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3775 struct cfg80211_auth_request *req)
9c6bd790 3776{
66e67e41
JB		 3777 struct ieee80211_local *local = sdata->local;
3778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3779 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3780 u16 auth_alg;
66e67e41
JB		 3781 int err;
3782
3783 /* prepare auth data structure */
9c6bd790 3784
77fdaa12
JB		 3785 switch (req->auth_type) {
3786 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3787 auth_alg = WLAN_AUTH_OPEN;
3788 break;
3789 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3790 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3791 return -EOPNOTSUPP;
77fdaa12
JB		 3792 auth_alg = WLAN_AUTH_SHARED_KEY;
3793 break;
3794 case NL80211_AUTHTYPE_FT:
3795 auth_alg = WLAN_AUTH_FT;
3796 break;
3797 case NL80211_AUTHTYPE_NETWORK_EAP:
3798 auth_alg = WLAN_AUTH_LEAP;
3799 break;
6b8ece3a
JM		 3800 case NL80211_AUTHTYPE_SAE:
3801 auth_alg = WLAN_AUTH_SAE;
3802 break;
77fdaa12
JB		 3803 default:
3804 return -EOPNOTSUPP;
60f8b39c 3805 }
77fdaa12 3806
6b8ece3a
JM		 3807 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3808 req->ie_len, GFP_KERNEL);
66e67e41 3809 if (!auth_data)
9c6bd790 3810 return -ENOMEM;
77fdaa12 3811
66e67e41 3812 auth_data->bss = req->bss;
77fdaa12 3813
6b8ece3a
JM		 3814 if (req->sae_data_len >= 4) {
3815 __le16 *pos = (__le16 *) req->sae_data;
3816 auth_data->sae_trans = le16_to_cpu(pos[0]);
3817 auth_data->sae_status = le16_to_cpu(pos[1]);
3818 memcpy(auth_data->data, req->sae_data + 4,
3819 req->sae_data_len - 4);
3820 auth_data->data_len += req->sae_data_len - 4;
3821 }
3822
77fdaa12 3823 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3824 memcpy(&auth_data->data[auth_data->data_len],
3825 req->ie, req->ie_len);
3826 auth_data->data_len += req->ie_len;
9c6bd790 3827 }
77fdaa12 3828
fffd0934 3829 if (req->key && req->key_len) {
66e67e41
JB		 3830 auth_data->key_len = req->key_len;
3831 auth_data->key_idx = req->key_idx;
3832 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3833 }
3834
66e67e41 3835 auth_data->algorithm = auth_alg;
60f8b39c 3836
66e67e41 3837 /* try to authenticate/probe */
2a33bee2 3838
66e67e41 3839 mutex_lock(&ifmgd->mtx);
2a33bee2 3840
66e67e41
JB		 3841 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3842 ifmgd->assoc_data) {
3843 err = -EBUSY;
3844 goto err_free;
2a33bee2
GE		 3845 }
3846
66e67e41
JB		 3847 if (ifmgd->auth_data)
3848 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3849
66e67e41
JB		 3850 /* prep auth_data so we don't go into idle on disassoc */
3851 ifmgd->auth_data = auth_data;
af6b6374 3852
66e67e41 3853 if (ifmgd->associated)
37ad3888 3854 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3855
bdcbd8e0 3856 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3857
a1cf775d
JB		 3858 err = ieee80211_prep_connection(sdata, req->bss, false);
3859 if (err)
66e67e41 3860 goto err_clear;
af6b6374 3861
66e67e41
JB		 3862 err = ieee80211_probe_auth(sdata);
3863 if (err) {
66e67e41
JB		 3864 sta_info_destroy_addr(sdata, req->bss->bssid);
3865 goto err_clear;
3866 }
3867
3868 /* hold our own reference */
5b112d3d 3869 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3870 err = 0;
3871 goto out_unlock;
3872
3873 err_clear:
3d2abdfd
EP		 3874 memset(ifmgd->bssid, 0, ETH_ALEN);
3875 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3876 ifmgd->auth_data = NULL;
3877 err_free:
3878 kfree(auth_data);
3879 out_unlock:
3880 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3881
66e67e41 3882 return err;
af6b6374
JB		 3883}
3884
77fdaa12
JB		 3885int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3886 struct cfg80211_assoc_request *req)
f0706e82 3887{
66e67e41 3888 struct ieee80211_local *local = sdata->local;
77fdaa12 3889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3890 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3891 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3892 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3893 struct ieee80211_supported_band *sband;
b08fbbd8 3894 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3895 int i, err;
f0706e82 3896
66e67e41
JB		 3897 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3898 if (!assoc_data)
3899 return -ENOMEM;
3900
9caf0364
JB		 3901 rcu_read_lock();
3902 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3903 if (!ssidie) {
3904 rcu_read_unlock();
3905 kfree(assoc_data);
3906 return -EINVAL;
3907 }
3908 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3909 assoc_data->ssid_len = ssidie[1];
3910 rcu_read_unlock();
3911
77fdaa12 3912 mutex_lock(&ifmgd->mtx);
9c87ba67 3913
66e67e41 3914 if (ifmgd->associated)
37ad3888 3915 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3916
3917 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3918 err = -EBUSY;
3919 goto err_free;
af6b6374 3920 }
77fdaa12 3921
66e67e41
JB		 3922 if (ifmgd->assoc_data) {
3923 err = -EBUSY;
3924 goto err_free;
3925 }
77fdaa12 3926
66e67e41
JB		 3927 if (ifmgd->auth_data) {
3928 bool match;
3929
3930 /* keep sta info, bssid if matching */
b203ca39 3931 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3932 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3933 }
3934
66e67e41 3935 /* prepare assoc data */
19c3b830 3936
d8ec4433
JO		 3937 ifmgd->beacon_crc_valid = false;
3938
de5036aa
JB		 3939 /*
3940 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3941 * We still associate in non-HT mode (11a/b/g) if any one of these
3942 * ciphers is configured as pairwise.
3943 * We can set this to true for non-11n hardware, that'll be checked
3944 * separately along with the peer capabilities.
3945 */
1c4cb928 3946 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3947 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3948 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3949 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3950 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3951 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3952 netdev_info(sdata->dev,
d545daba 3953 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3954 }
3955 }
77fdaa12 3956
d545daba 3957 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3958 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3959 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3960 }
ef96a842 3961
4e74bfdb
JB		 3962 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3963 sband = local->hw.wiphy->bands[req->bss->channel->band];
3964 if (!sband->ht_cap.ht_supported ||
1c4cb928 3965 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3966 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3967 if (!bss->wmm_used)
3968 netdev_info(sdata->dev,
3969 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3970 }
4e74bfdb 3971
d545daba
MP		 3972 /* disable VHT if we don't support it or the AP doesn't use WMM */
3973 if (!sband->vht_cap.vht_supported ||
3974 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3975 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3976 if (!bss->wmm_used)
3977 netdev_info(sdata->dev,
3978 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3979 }
3980
ef96a842
BG		 3981 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3982 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3983 sizeof(ifmgd->ht_capa_mask));
3984
77fdaa12 3985 if (req->ie && req->ie_len) {
66e67e41
JB		 3986 memcpy(assoc_data->ie, req->ie, req->ie_len);
3987 assoc_data->ie_len = req->ie_len;
3988 }
f679f65d 3989
66e67e41 3990 assoc_data->bss = req->bss;
f679f65d 3991
af6b6374
JB		 3992 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3993 if (ifmgd->powersave)
04ecd257 3994 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3995 else
04ecd257 3996 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3997 } else
04ecd257 3998 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3999
66e67e41 4000 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4001 assoc_data->wmm = bss->wmm_used &&
4002 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4003 assoc_data->supp_rates = bss->supp_rates;
4004 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4005
9caf0364 4006 rcu_read_lock();
9dde6423
JB		 4007 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4008 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4009 assoc_data->ap_ht_param =
4010 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4011 else
a8243b72 4012 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4013 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4014 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4015 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4016 sizeof(struct ieee80211_vht_cap));
4017 else
4018 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4019 rcu_read_unlock();
63f170e0 4020
ab13315a
KV		 4021 if (bss->wmm_used && bss->uapsd_supported &&
4022 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4023 assoc_data->uapsd = true;
ab13315a
KV		 4024 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4025 } else {
76f0303d 4026 assoc_data->uapsd = false;
ab13315a
KV		 4027 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4028 }
4029
77fdaa12 4030 if (req->prev_bssid)
66e67e41 4031 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4032
4033 if (req->use_mfp) {
4034 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4035 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4036 } else {
4037 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4038 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4039 }
4040
4041 if (req->crypto.control_port)
4042 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4043 else
4044 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4045
a621fa4d
JB		 4046 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4047 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4048
66e67e41
JB		 4049 /* kick off associate process */
4050
4051 ifmgd->assoc_data = assoc_data;
826262c3 4052 ifmgd->dtim_period = 0;
66e67e41 4053
a1cf775d
JB		 4054 err = ieee80211_prep_connection(sdata, req->bss, true);
4055 if (err)
4056 goto err_clear;
66e67e41 4057
c65dd147
EG		 4058 rcu_read_lock();
4059 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4060
c65dd147
EG		 4061 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4062 !beacon_ies) {
4063 /*
4064 * Wait up to one beacon interval ...
4065 * should this be more if we miss one?
4066 */
4067 sdata_info(sdata, "waiting for beacon from %pM\n",
4068 ifmgd->bssid);
4069 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4070 assoc_data->timeout_started = true;
c65dd147
EG		 4071 assoc_data->need_beacon = true;
4072 } else if (beacon_ies) {
4073 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4074 beacon_ies->data,
4075 beacon_ies->len);
ef429dad
JB		 4076 u8 dtim_count = 0;
4077
c65dd147
EG		 4078 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4079 const struct ieee80211_tim_ie *tim;
4080 tim = (void *)(tim_ie + 2);
4081 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4082 dtim_count = tim->dtim_count;
826262c3 4083 }
66e67e41 4084 assoc_data->have_beacon = true;
66e67e41 4085 assoc_data->timeout = jiffies;
89afe614 4086 assoc_data->timeout_started = true;
ef429dad
JB		 4087
4088 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4089 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4090 sdata->vif.bss_conf.sync_device_ts =
4091 bss->device_ts_beacon;
4092 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4093 }
c65dd147
EG		 4094 } else {
4095 assoc_data->timeout = jiffies;
89afe614 4096 assoc_data->timeout_started = true;
66e67e41 4097 }
c65dd147
EG		 4098 rcu_read_unlock();
4099
66e67e41
JB		 4100 run_again(ifmgd, assoc_data->timeout);
4101
fcff4f10
PS		 4102 if (bss->corrupt_data) {
4103 char *corrupt_type = "data";
4104 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4105 if (bss->corrupt_data &
4106 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4107 corrupt_type = "beacon and probe response";
4108 else
4109 corrupt_type = "beacon";
4110 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4111 corrupt_type = "probe response";
bdcbd8e0
JB		 4112 sdata_info(sdata, "associating with AP with corrupt %s\n",
4113 corrupt_type);
fcff4f10
PS		 4114 }
4115
66e67e41
JB		 4116 err = 0;
4117 goto out;
4118 err_clear:
3d2abdfd
EP		 4119 memset(ifmgd->bssid, 0, ETH_ALEN);
4120 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4121 ifmgd->assoc_data = NULL;
4122 err_free:
4123 kfree(assoc_data);
4124 out:
4125 mutex_unlock(&ifmgd->mtx);
4126
4127 return err;
f0706e82
JB		 4128}
4129
77fdaa12 4130int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4131 struct cfg80211_deauth_request *req)
f0706e82 4132{
46900298 4133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4134 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4135 bool tx = !req->local_state_change;
86552017 4136 bool sent_frame = false;
f0706e82 4137
77fdaa12
JB		 4138 mutex_lock(&ifmgd->mtx);
4139
bdcbd8e0
JB		 4140 sdata_info(sdata,
4141 "deauthenticating from %pM by local choice (reason=%d)\n",
4142 req->bssid, req->reason_code);
0ff71613 4143
86552017 4144 if (ifmgd->auth_data) {
8c7d857c 4145 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4146 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4147 IEEE80211_STYPE_DEAUTH,
6863255b 4148 req->reason_code, tx,
37ad3888 4149 frame_buf);
86552017
JB		 4150 ieee80211_destroy_auth_data(sdata, false);
4151 mutex_unlock(&ifmgd->mtx);
4152
4153 sent_frame = tx;
4154 goto out;
8c7d857c
EG		 4155 }
4156
86552017
JB		 4157 if (ifmgd->associated &&
4158 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4159 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4160 req->reason_code, tx, frame_buf);
4161 sent_frame = tx;
4162 }
37ad3888
JB		 4163 mutex_unlock(&ifmgd->mtx);
4164
86552017 4165 out:
86552017
JB		 4166 if (sent_frame)
4167 __cfg80211_send_deauth(sdata->dev, frame_buf,
4168 IEEE80211_DEAUTH_FRAME_LEN);
4169
f0706e82
JB		 4170 return 0;
4171}
84363e6e 4172
77fdaa12 4173int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4174 struct cfg80211_disassoc_request *req)
9c6bd790 4175{
77fdaa12 4176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4177 u8 bssid[ETH_ALEN];
6ae16775 4178 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4179
77fdaa12 4180 mutex_lock(&ifmgd->mtx);
10f644a4 4181
8d8b261a
JB		 4182 /*
4183 * cfg80211 should catch this ... but it's racy since
4184 * we can receive a disassoc frame, process it, hand it
4185 * to cfg80211 while that's in a locked section already
4186 * trying to tell us that the user wants to disconnect.
4187 */
0c1ad2ca 4188 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4189 mutex_unlock(&ifmgd->mtx);
4190 return -ENOLINK;
4191 }
4192
bdcbd8e0
JB		 4193 sdata_info(sdata,
4194 "disassociating from %pM by local choice (reason=%d)\n",
4195 req->bss->bssid, req->reason_code);
0ff71613 4196
e69e95db 4197 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4198 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4199 req->reason_code, !req->local_state_change,
4200 frame_buf);
77fdaa12 4201 mutex_unlock(&ifmgd->mtx);
10f644a4 4202
6ae16775
AQ		 4203 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4204 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4205
10f644a4
JB		 4206 return 0;
4207}
026331c4 4208
afa762f6 4209void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4210{
4211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4212
4213 mutex_lock(&ifmgd->mtx);
4214 if (ifmgd->assoc_data)
4215 ieee80211_destroy_assoc_data(sdata, false);
4216 if (ifmgd->auth_data)
4217 ieee80211_destroy_auth_data(sdata, false);
4218 del_timer_sync(&ifmgd->timer);
4219 mutex_unlock(&ifmgd->mtx);
4220}
4221
a97c13c3
JO		 4222void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4223 enum nl80211_cqm_rssi_threshold_event rssi_event,
4224 gfp_t gfp)
4225{
4226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4227
b5878a2d
JB		 4228 trace_api_cqm_rssi_notify(sdata, rssi_event);
4229
a97c13c3
JO		 4230 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4231}
4232EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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