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mac80211: enable Auth Protocol Identifier on mesh config.
[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 */
59c1ec2b
BG		 59static int beacon_loss_count = 7;
60module_param(beacon_loss_count, int, 0644);
61MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 63
b291ba11
JB		 64/*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
d1c5091f 68#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 69/*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
180205bd
BG		 74static int probe_wait_ms = 500;
75module_param(probe_wait_ms, int, 0644);
76MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
f0706e82 79
17e4ec14
JM		 80/*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85#define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
391a200a
JM		 87/*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
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,
30eb1dc2
JB		 117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 120};
121
5484e237 122/* utils */
77fdaa12
JB		 123static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124{
46a5ebaf 125 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 126}
127
ca386f31
JB		 128/*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
66e67e41 138static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 139{
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145}
146
d3a910a8 147void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 148{
c1288b12 149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 150 return;
151
7eeff74c
JB		 152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
b291ba11 155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 157}
158
be099e82
LR		 159void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160{
0c699c3a
LR		 161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
8628172f
SG		 163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
be099e82
LR		 166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 171
172 ifmgd->probe_send_count = 0;
be099e82
LR		 173}
174
5484e237 175static int ecw2cw(int ecw)
60f8b39c 176{
5484e237 177 return (1 << ecw) - 1;
60f8b39c
JB		 178}
179
6565ec9b
JB		 180static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181{
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232}
233
234static u32
235ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 240 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 241{
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
30eb1dc2
JB		 268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 292 /* also mark 40 MHz disabled */
293 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 294 goto out;
295 }
296
297 if (!vht_oper || !sband->vht_cap.vht_supported) {
298 ret = IEEE80211_STA_DISABLE_VHT;
299 goto out;
300 }
301
302 vht_chandef.chan = channel;
303 vht_chandef.center_freq1 =
304 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
305 channel->band);
306 vht_chandef.center_freq2 = 0;
307
6565ec9b
JB		 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;
6553bf04
JB		 320 vht_chandef.center_freq2 =
321 ieee80211_channel_to_frequency(
322 vht_oper->center_freq_seg2_idx,
323 channel->band);
6565ec9b
JB		 324 break;
325 default:
30eb1dc2
JB		 326 if (verbose)
327 sdata_info(sdata,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
6565ec9b
JB		 330 ret = IEEE80211_STA_DISABLE_VHT;
331 goto out;
332 }
333
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 335 if (verbose)
336 sdata_info(sdata,
337 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 338 ret = IEEE80211_STA_DISABLE_VHT;
339 goto out;
340 }
341
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
343 ret = 0;
344 goto out;
345 }
346
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 348 if (verbose)
349 sdata_info(sdata,
350 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 351 ret = IEEE80211_STA_DISABLE_VHT;
352 goto out;
353 }
354
355 *chandef = vht_chandef;
356
357 ret = 0;
358
359out:
586e01ed
JB		 360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
363
6565ec9b
JB		 364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
369 goto out;
370 }
371
372 ret |= chandef_downgrade(chandef);
373 }
374
30eb1dc2 375 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 376 sdata_info(sdata,
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
378
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
380 return ret;
381}
382
30eb1dc2
JB		 383static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
d5522e03
JB		 388{
389 struct ieee80211_local *local = sdata->local;
30eb1dc2 390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 391 struct ieee80211_supported_band *sband;
55de908a 392 struct ieee80211_channel *chan;
30eb1dc2 393 struct cfg80211_chan_def chandef;
9ed6bcce 394 u16 ht_opmode;
30eb1dc2
JB		 395 u32 flags;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
397 int ret;
d5522e03 398
30eb1dc2
JB		 399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 401 return 0;
402
30eb1dc2
JB		 403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
405 vht_oper = NULL;
406
407 if (WARN_ON_ONCE(!sta))
408 return -EINVAL;
409
f2d9330e 410 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 411 sband = local->hw.wiphy->bands[chan->band];
d5522e03 412
30eb1dc2
JB		 413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
416
417 /*
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
423 */
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
433
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
435 return 0;
436
437 sdata_info(sdata,
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
441
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
450 ifmgd->bssid);
451 return -EINVAL;
452 }
453
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 break;
4bf88530 459 case NL80211_CHAN_WIDTH_40:
30eb1dc2 460 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 461 break;
30eb1dc2
JB		 462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 break;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 468 break;
30eb1dc2
JB		 469 default:
470 return -EINVAL;
64f68e5d 471 }
d5522e03 472
30eb1dc2
JB		 473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 475
30eb1dc2
JB		 476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
480 }
64f68e5d 481
30eb1dc2
JB		 482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 if (ret) {
484 sdata_info(sdata,
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
486 ifmgd->bssid);
487 return ret;
488 }
7cc44ed4 489
30eb1dc2
JB		 490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
0aaffa9b 494 }
d5522e03 495
074d46d1 496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 497
498 /* if bss configuration changed store the new one */
30eb1dc2
JB		 499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
9ed6bcce 501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 502 }
503
30eb1dc2 504 return 0;
d5522e03
JB		 505}
506
9c6bd790
JB		 507/* frame sending functions */
508
66e67e41
JB		 509static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
511 u32 *rates)
512{
513 int i, j, count;
514 *rates = 0;
515 count = 0;
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
518
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
521 *rates |= BIT(j);
522 count++;
523 break;
524 }
525 }
526
527 return count;
528}
529
530static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 531 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
535{
66e67e41
JB		 536 u8 *pos;
537 u32 flags = channel->flags;
538 u16 cap;
539 struct ieee80211_sta_ht_cap ht_cap;
540
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
542
66e67e41
JB		 543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
545
66e67e41
JB		 546 /* determine capability flags */
547 cap = ht_cap.cap;
548
9dde6423 549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
554 }
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
560 }
561 break;
562 }
563
24398e39
JB		 564 /*
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
568 */
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
572 }
573
66e67e41
JB		 574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
576 switch (smps) {
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
579 WARN_ON(1);
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
583 break;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
587 break;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
591 break;
592 }
593
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
597}
598
d545daba
MP		 599static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
600 struct sk_buff *skb,
b08fbbd8
JB		 601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 603{
604 u8 *pos;
605 u32 cap;
606 struct ieee80211_sta_vht_cap vht_cap;
607
608 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
609
610 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 611 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 612
613 /* determine capability flags */
614 cap = vht_cap.cap;
615
f2d9d270
JB		 616 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
617 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
618 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
619 }
620
621 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
622 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
623 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
624 }
625
b08fbbd8
JB		 626 /*
627 * Some APs apparently get confused if our capabilities are better
628 * than theirs, so restrict what we advertise in the assoc request.
629 */
630 if (!(ap_vht_cap->vht_cap_info &
631 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
632 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
633
d545daba 634 /* reserve and fill IE */
d4950281 635 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 636 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
637}
638
66e67e41
JB		 639static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
640{
641 struct ieee80211_local *local = sdata->local;
642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
643 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
644 struct sk_buff *skb;
645 struct ieee80211_mgmt *mgmt;
646 u8 *pos, qos_info;
647 size_t offset = 0, noffset;
648 int i, count, rates_len, supp_rates_len;
649 u16 capab;
650 struct ieee80211_supported_band *sband;
55de908a
JB		 651 struct ieee80211_chanctx_conf *chanctx_conf;
652 struct ieee80211_channel *chan;
66e67e41 653 u32 rates = 0;
66e67e41
JB		 654
655 lockdep_assert_held(&ifmgd->mtx);
656
55de908a
JB		 657 rcu_read_lock();
658 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
659 if (WARN_ON(!chanctx_conf)) {
660 rcu_read_unlock();
661 return;
662 }
4bf88530 663 chan = chanctx_conf->def.chan;
55de908a
JB		 664 rcu_read_unlock();
665 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 666
667 if (assoc_data->supp_rates_len) {
668 /*
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
672 * b-only mode)...
673 */
674 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
675 assoc_data->supp_rates_len,
676 sband, &rates);
677 } else {
678 /*
679 * In case AP not provide any supported rates information
680 * before association, we send information element(s) with
681 * all rates that we support.
682 */
683 rates = ~0;
684 rates_len = sband->n_bitrates;
685 }
686
687 skb = alloc_skb(local->hw.extra_tx_headroom +
688 sizeof(*mgmt) + /* bit too much but doesn't matter */
689 2 + assoc_data->ssid_len + /* SSID */
690 4 + rates_len + /* (extended) rates */
691 4 + /* power capability */
692 2 + 2 * sband->n_channels + /* supported channels */
693 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 694 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 695 assoc_data->ie_len + /* extra IEs */
696 9, /* WMM */
697 GFP_KERNEL);
698 if (!skb)
699 return;
700
701 skb_reserve(skb, local->hw.extra_tx_headroom);
702
703 capab = WLAN_CAPABILITY_ESS;
704
705 if (sband->band == IEEE80211_BAND_2GHZ) {
706 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
707 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
708 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
709 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
710 }
711
712 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
713 capab |= WLAN_CAPABILITY_PRIVACY;
714
715 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
716 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
717 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
718
719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
720 memset(mgmt, 0, 24);
721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
724
725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
726 skb_put(skb, 10);
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_REASSOC_REQ);
729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
730 mgmt->u.reassoc_req.listen_interval =
731 cpu_to_le16(local->hw.conf.listen_interval);
732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
733 ETH_ALEN);
734 } else {
735 skb_put(skb, 4);
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_ASSOC_REQ);
738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
739 mgmt->u.assoc_req.listen_interval =
740 cpu_to_le16(local->hw.conf.listen_interval);
741 }
742
743 /* SSID */
744 pos = skb_put(skb, 2 + assoc_data->ssid_len);
745 *pos++ = WLAN_EID_SSID;
746 *pos++ = assoc_data->ssid_len;
747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
748
749 /* add all rates which were marked to be used above */
750 supp_rates_len = rates_len;
751 if (supp_rates_len > 8)
752 supp_rates_len = 8;
753
754 pos = skb_put(skb, supp_rates_len + 2);
755 *pos++ = WLAN_EID_SUPP_RATES;
756 *pos++ = supp_rates_len;
757
758 count = 0;
759 for (i = 0; i < sband->n_bitrates; i++) {
760 if (BIT(i) & rates) {
761 int rate = sband->bitrates[i].bitrate;
762 *pos++ = (u8) (rate / 5);
763 if (++count == 8)
764 break;
765 }
766 }
767
768 if (rates_len > count) {
769 pos = skb_put(skb, rates_len - count + 2);
770 *pos++ = WLAN_EID_EXT_SUPP_RATES;
771 *pos++ = rates_len - count;
772
773 for (i++; i < sband->n_bitrates; i++) {
774 if (BIT(i) & rates) {
775 int rate = sband->bitrates[i].bitrate;
776 *pos++ = (u8) (rate / 5);
777 }
778 }
779 }
780
781 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
782 /* 1. power capabilities */
783 pos = skb_put(skb, 4);
784 *pos++ = WLAN_EID_PWR_CAPABILITY;
785 *pos++ = 2;
786 *pos++ = 0; /* min tx power */
55de908a 787 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 788
789 /* 2. supported channels */
790 /* TODO: get this in reg domain format */
791 pos = skb_put(skb, 2 * sband->n_channels + 2);
792 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
793 *pos++ = 2 * sband->n_channels;
794 for (i = 0; i < sband->n_channels; i++) {
795 *pos++ = ieee80211_frequency_to_channel(
796 sband->channels[i].center_freq);
797 *pos++ = 1; /* one channel in the subband*/
798 }
799 }
800
801 /* if present, add any custom IEs that go before HT */
802 if (assoc_data->ie_len && assoc_data->ie) {
803 static const u8 before_ht[] = {
804 WLAN_EID_SSID,
805 WLAN_EID_SUPP_RATES,
806 WLAN_EID_EXT_SUPP_RATES,
807 WLAN_EID_PWR_CAPABILITY,
808 WLAN_EID_SUPPORTED_CHANNELS,
809 WLAN_EID_RSN,
810 WLAN_EID_QOS_CAPA,
811 WLAN_EID_RRM_ENABLED_CAPABILITIES,
812 WLAN_EID_MOBILITY_DOMAIN,
813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
814 };
815 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
816 before_ht, ARRAY_SIZE(before_ht),
817 offset);
818 pos = skb_put(skb, noffset - offset);
819 memcpy(pos, assoc_data->ie + offset, noffset - offset);
820 offset = noffset;
821 }
822
f2d9d270
JB		 823 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
824 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
825 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
826
a8243b72 827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 828 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 829 sband, chan, sdata->smps_mode);
66e67e41 830
d545daba 831 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 832 ieee80211_add_vht_ie(sdata, skb, sband,
833 &assoc_data->ap_vht_cap);
d545daba 834
66e67e41
JB		 835 /* if present, add any custom non-vendor IEs that go after HT */
836 if (assoc_data->ie_len && assoc_data->ie) {
837 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
838 assoc_data->ie_len,
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
76f0303d
JB		 845 if (assoc_data->wmm) {
846 if (assoc_data->uapsd) {
dc41e4d4
EP		 847 qos_info = ifmgd->uapsd_queues;
848 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 849 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
850 } else {
851 qos_info = 0;
852 }
853
854 pos = skb_put(skb, 9);
855 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
856 *pos++ = 7; /* len */
857 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
858 *pos++ = 0x50;
859 *pos++ = 0xf2;
860 *pos++ = 2; /* WME */
861 *pos++ = 0; /* WME info */
862 *pos++ = 1; /* WME ver */
863 *pos++ = qos_info;
864 }
865
866 /* add any remaining custom (i.e. vendor specific here) IEs */
867 if (assoc_data->ie_len && assoc_data->ie) {
868 noffset = assoc_data->ie_len;
869 pos = skb_put(skb, noffset - offset);
870 memcpy(pos, assoc_data->ie + offset, noffset - offset);
871 }
872
a1845fc7
JB		 873 drv_mgd_prepare_tx(local, sdata);
874
66e67e41 875 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 876 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
877 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
878 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 879 ieee80211_tx_skb(sdata, skb);
880}
881
572e0012
KV		 882void ieee80211_send_pspoll(struct ieee80211_local *local,
883 struct ieee80211_sub_if_data *sdata)
884{
572e0012
KV		 885 struct ieee80211_pspoll *pspoll;
886 struct sk_buff *skb;
572e0012 887
d8cd189e
KV		 888 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
889 if (!skb)
572e0012 890 return;
572e0012 891
d8cd189e
KV		 892 pspoll = (struct ieee80211_pspoll *) skb->data;
893 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 894
62ae67be
JB		 895 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
896 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 897}
898
965bedad
JB		 899void ieee80211_send_nullfunc(struct ieee80211_local *local,
900 struct ieee80211_sub_if_data *sdata,
901 int powersave)
902{
903 struct sk_buff *skb;
d8cd189e 904 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 906
d8cd189e
KV		 907 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
908 if (!skb)
965bedad 909 return;
965bedad 910
d8cd189e 911 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 912 if (powersave)
d8cd189e 913 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 914
6c17b77b
SF		 915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
916 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 917 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
920
62ae67be 921 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 922}
923
d524215f
FF		 924static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
925 struct ieee80211_sub_if_data *sdata)
926{
927 struct sk_buff *skb;
928 struct ieee80211_hdr *nullfunc;
929 __le16 fc;
930
931 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
932 return;
933
934 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 935 if (!skb)
d524215f 936 return;
d15b8459 937
d524215f
FF		 938 skb_reserve(skb, local->hw.extra_tx_headroom);
939
940 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
941 memset(nullfunc, 0, 30);
942 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
943 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
944 nullfunc->frame_control = fc;
945 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
946 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
947 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
948 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
949
950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
951 ieee80211_tx_skb(sdata, skb);
952}
953
cc32abd4
JB		 954/* spectrum management related things */
955static void ieee80211_chswitch_work(struct work_struct *work)
956{
957 struct ieee80211_sub_if_data *sdata =
958 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 959 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
961
9607e6b6 962 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 963 return;
964
77fdaa12
JB		 965 mutex_lock(&ifmgd->mtx);
966 if (!ifmgd->associated)
967 goto out;
cc32abd4 968
85220d71 969 local->_oper_chandef = local->csa_chandef;
675a0b04
KB		 970
971 if (!local->ops->channel_switch) {
5ce6e438 972 /* call "hw_config" only if doing sw channel switch */
675a0b04 973 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 974 } else {
975 /* update the device channel directly */
675a0b04 976 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 977 }
77fdaa12 978
cc32abd4 979 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 980 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 981
57eebdf3 982 /* XXX: wait for a beacon first? */
675a0b04 983 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 984 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 985 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 986 out:
987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
988 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 989}
990
5ce6e438
JB		 991void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
992{
55de908a
JB		 993 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 995
996 trace_api_chswitch_done(sdata, success);
997 if (!success) {
882a7c69
JB		 998 sdata_info(sdata,
999 "driver channel switch failed, disconnecting\n");
1000 ieee80211_queue_work(&sdata->local->hw,
1001 &ifmgd->csa_connection_drop_work);
1002 } else {
1003 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1004 }
5ce6e438
JB		 1005}
1006EXPORT_SYMBOL(ieee80211_chswitch_done);
1007
cc32abd4
JB		 1008static void ieee80211_chswitch_timer(unsigned long data)
1009{
1010 struct ieee80211_sub_if_data *sdata =
1011 (struct ieee80211_sub_if_data *) data;
5bb644a0 1012
9b7d72c1 1013 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1014}
1015
37799e52 1016static void
4a3cb702 1017ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 1018 u64 timestamp, struct ieee802_11_elems *elems,
1019 bool beacon)
cc32abd4 1020{
b4f286a1 1021 struct ieee80211_local *local = sdata->local;
cc32abd4 1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52
JB		 1023 struct cfg80211_bss *cbss = ifmgd->associated;
1024 struct ieee80211_bss *bss;
55de908a 1025 struct ieee80211_chanctx *chanctx;
b4f286a1
JB		 1026 enum ieee80211_band new_band;
1027 int new_freq;
1028 u8 new_chan_no;
1029 u8 count;
1030 u8 mode;
cd64f2a9 1031 struct ieee80211_channel *new_chan;
85220d71 1032 struct cfg80211_chan_def new_chandef = {};
cd64f2a9
JB		 1033 struct cfg80211_chan_def new_vht_chandef = {};
1034 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1035 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
04a161f4 1036 const struct ieee80211_ht_operation *ht_oper;
85220d71 1037 int secondary_channel_offset = -1;
cc32abd4 1038
77fdaa12
JB		 1039 ASSERT_MGD_MTX(ifmgd);
1040
37799e52 1041 if (!cbss)
cc32abd4
JB		 1042 return;
1043
b4f286a1 1044 if (local->scanning)
cc32abd4
JB		 1045 return;
1046
37799e52 1047 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1048 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1049 return;
1050
cd64f2a9
JB		 1051 sec_chan_offs = elems->sec_chan_offs;
1052 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
04a161f4 1053 ht_oper = elems->ht_operation;
cd64f2a9
JB		 1054
1055 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1056 IEEE80211_STA_DISABLE_40MHZ)) {
1057 sec_chan_offs = NULL;
1058 wide_bw_chansw_ie = NULL;
04a161f4
JB		 1059 /* only used for bandwidth here */
1060 ht_oper = NULL;
85220d71
JB		 1061 }
1062
cd64f2a9
JB		 1063 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1064 wide_bw_chansw_ie = NULL;
85220d71 1065
b4f286a1
JB		 1066 if (elems->ext_chansw_ie) {
1067 if (!ieee80211_operating_class_to_band(
1068 elems->ext_chansw_ie->new_operating_class,
1069 &new_band)) {
1070 sdata_info(sdata,
1071 "cannot understand ECSA IE operating class %d, disconnecting\n",
1072 elems->ext_chansw_ie->new_operating_class);
1073 ieee80211_queue_work(&local->hw,
1074 &ifmgd->csa_connection_drop_work);
1075 }
1076 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1077 count = elems->ext_chansw_ie->count;
1078 mode = elems->ext_chansw_ie->mode;
1079 } else if (elems->ch_switch_ie) {
1080 new_band = cbss->channel->band;
1081 new_chan_no = elems->ch_switch_ie->new_ch_num;
1082 count = elems->ch_switch_ie->count;
1083 mode = elems->ch_switch_ie->mode;
1084 } else {
1085 /* nothing here we understand */
37799e52 1086 return;
b4f286a1 1087 }
37799e52
JB		 1088
1089 bss = (void *)cbss->priv;
1090
b4f286a1 1091 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
cd64f2a9
JB		 1092 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1093 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
882a7c69
JB		 1094 sdata_info(sdata,
1095 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1096 ifmgd->associated->bssid, new_freq);
b4f286a1 1097 ieee80211_queue_work(&local->hw,
882a7c69 1098 &ifmgd->csa_connection_drop_work);
cc32abd4 1099 return;
882a7c69 1100 }
cc32abd4 1101
04a161f4 1102 if (!beacon && sec_chan_offs) {
cd64f2a9 1103 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
04a161f4
JB		 1104 } else if (beacon && ht_oper) {
1105 secondary_channel_offset =
1106 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
cd64f2a9 1107 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
04a161f4
JB		 1108 /*
1109 * If it's not a beacon, HT is enabled and the IE not present,
1110 * it's 20 MHz, 802.11-2012 8.5.2.6:
1111 * This element [the Secondary Channel Offset Element] is
1112 * present when switching to a 40 MHz channel. It may be
1113 * present when switching to a 20 MHz channel (in which
1114 * case the secondary channel offset is set to SCN).
1115 */
cd64f2a9
JB		 1116 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1117 }
1118
85220d71
JB		 1119 switch (secondary_channel_offset) {
1120 default:
1121 /* secondary_channel_offset was present but is invalid */
1122 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
cd64f2a9 1123 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1124 NL80211_CHAN_HT20);
1125 break;
1126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
cd64f2a9 1127 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1128 NL80211_CHAN_HT40PLUS);
1129 break;
1130 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
cd64f2a9 1131 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1132 NL80211_CHAN_HT40MINUS);
1133 break;
1134 case -1:
cd64f2a9 1135 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1136 NL80211_CHAN_NO_HT);
1137 break;
1138 }
1139
cd64f2a9
JB		 1140 if (wide_bw_chansw_ie) {
1141 new_vht_chandef.chan = new_chan;
1142 new_vht_chandef.center_freq1 =
1143 ieee80211_channel_to_frequency(
1144 wide_bw_chansw_ie->new_center_freq_seg0,
1145 new_band);
1146
1147 switch (wide_bw_chansw_ie->new_channel_width) {
1148 default:
1149 /* hmmm, ignore VHT and use HT if present */
1150 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1151 new_vht_chandef.chan = NULL;
1152 break;
1153 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1154 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1155 break;
1156 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1157 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1158 break;
1159 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1160 /* field is otherwise reserved */
1161 new_vht_chandef.center_freq2 =
1162 ieee80211_channel_to_frequency(
1163 wide_bw_chansw_ie->new_center_freq_seg1,
1164 new_band);
1165 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1166 break;
1167 }
1168 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1169 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1170 chandef_downgrade(&new_vht_chandef);
1171 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1172 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1173 chandef_downgrade(&new_vht_chandef);
1174 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1175 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1176 chandef_downgrade(&new_vht_chandef);
1177 }
1178
1179 /* if VHT data is there validate & use it */
1180 if (new_vht_chandef.chan) {
1181 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1182 &new_chandef)) {
1183 sdata_info(sdata,
1184 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1185 ifmgd->associated->bssid);
1186 ieee80211_queue_work(&local->hw,
1187 &ifmgd->csa_connection_drop_work);
1188 return;
1189 }
1190 new_chandef = new_vht_chandef;
1191 }
1192
85220d71
JB		 1193 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1194 IEEE80211_CHAN_DISABLED)) {
1195 sdata_info(sdata,
1196 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1197 ifmgd->associated->bssid, new_freq,
1198 new_chandef.width, new_chandef.center_freq1,
1199 new_chandef.center_freq2);
1200 ieee80211_queue_work(&local->hw,
1201 &ifmgd->csa_connection_drop_work);
1202 return;
1203 }
1204
57eebdf3
JB		 1205 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1206
b4f286a1 1207 if (local->use_chanctx) {
55de908a
JB		 1208 sdata_info(sdata,
1209 "not handling channel switch with channel contexts\n");
b4f286a1 1210 ieee80211_queue_work(&local->hw,
55de908a 1211 &ifmgd->csa_connection_drop_work);
246dc3fd 1212 return;
55de908a
JB		 1213 }
1214
b4f286a1 1215 mutex_lock(&local->chanctx_mtx);
55de908a 1216 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
b4f286a1 1217 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1218 return;
1219 }
1220 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1221 struct ieee80211_chanctx, conf);
1222 if (chanctx->refcount > 1) {
1223 sdata_info(sdata,
1224 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1225 ieee80211_queue_work(&local->hw,
55de908a 1226 &ifmgd->csa_connection_drop_work);
b4f286a1 1227 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1228 return;
1229 }
b4f286a1 1230 mutex_unlock(&local->chanctx_mtx);
55de908a 1231
85220d71 1232 local->csa_chandef = new_chandef;
55de908a 1233
b4f286a1
JB		 1234 if (mode)
1235 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1236 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1237 IEEE80211_QUEUE_STOP_REASON_CSA);
1238
b4f286a1 1239 if (local->ops->channel_switch) {
5ce6e438 1240 /* use driver's channel switch callback */
57eebdf3
JB		 1241 struct ieee80211_channel_switch ch_switch = {
1242 .timestamp = timestamp,
b4f286a1 1243 .block_tx = mode,
85220d71 1244 .chandef = new_chandef,
b4f286a1 1245 .count = count,
57eebdf3
JB		 1246 };
1247
b4f286a1 1248 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1249 return;
1250 }
1251
1252 /* channel switch handled in software */
b4f286a1
JB		 1253 if (count <= 1)
1254 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1255 else
cc32abd4 1256 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1257 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1258}
1259
1ea6f9c0
JB		 1260static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1261 struct ieee80211_channel *channel,
1262 const u8 *country_ie, u8 country_ie_len,
1263 const u8 *pwr_constr_elem)
cc32abd4 1264{
04b7b2ff
JB		 1265 struct ieee80211_country_ie_triplet *triplet;
1266 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1267 int i, chan_pwr, chan_increment, new_ap_level;
1268 bool have_chan_pwr = false;
cc32abd4 1269
04b7b2ff
JB		 1270 /* Invalid IE */
1271 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1272 return 0;
cc32abd4 1273
04b7b2ff
JB		 1274 triplet = (void *)(country_ie + 3);
1275 country_ie_len -= 3;
1276
1277 switch (channel->band) {
1278 default:
1279 WARN_ON_ONCE(1);
1280 /* fall through */
1281 case IEEE80211_BAND_2GHZ:
1282 case IEEE80211_BAND_60GHZ:
1283 chan_increment = 1;
1284 break;
1285 case IEEE80211_BAND_5GHZ:
1286 chan_increment = 4;
1287 break;
cc32abd4 1288 }
04b7b2ff
JB		 1289
1290 /* find channel */
1291 while (country_ie_len >= 3) {
1292 u8 first_channel = triplet->chans.first_channel;
1293
1294 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1295 goto next;
1296
1297 for (i = 0; i < triplet->chans.num_channels; i++) {
1298 if (first_channel + i * chan_increment == chan) {
1299 have_chan_pwr = true;
1300 chan_pwr = triplet->chans.max_power;
1301 break;
1302 }
1303 }
1304 if (have_chan_pwr)
1305 break;
1306
1307 next:
1308 triplet++;
1309 country_ie_len -= 3;
1310 }
1311
1312 if (!have_chan_pwr)
1ea6f9c0 1313 return 0;
04b7b2ff
JB		 1314
1315 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1316
1ea6f9c0
JB		 1317 if (sdata->ap_power_level == new_ap_level)
1318 return 0;
04b7b2ff
JB		 1319
1320 sdata_info(sdata,
1321 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1322 new_ap_level, chan_pwr, *pwr_constr_elem,
1323 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1324 sdata->ap_power_level = new_ap_level;
1325 if (__ieee80211_recalc_txpower(sdata))
1326 return BSS_CHANGED_TXPOWER;
1327 return 0;
cc32abd4
JB		 1328}
1329
965bedad
JB		 1330/* powersave */
1331static void ieee80211_enable_ps(struct ieee80211_local *local,
1332 struct ieee80211_sub_if_data *sdata)
1333{
1334 struct ieee80211_conf *conf = &local->hw.conf;
1335
d5edaedc
JB		 1336 /*
1337 * If we are scanning right now then the parameters will
1338 * take effect when scan finishes.
1339 */
fbe9c429 1340 if (local->scanning)
d5edaedc
JB		 1341 return;
1342
965bedad
JB		 1343 if (conf->dynamic_ps_timeout > 0 &&
1344 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1345 mod_timer(&local->dynamic_ps_timer, jiffies +
1346 msecs_to_jiffies(conf->dynamic_ps_timeout));
1347 } else {
1348 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1349 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1350
2a13052f
JO		 1351 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1352 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1353 return;
1354
1355 conf->flags |= IEEE80211_CONF_PS;
1356 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1357 }
1358}
1359
1360static void ieee80211_change_ps(struct ieee80211_local *local)
1361{
1362 struct ieee80211_conf *conf = &local->hw.conf;
1363
1364 if (local->ps_sdata) {
965bedad
JB		 1365 ieee80211_enable_ps(local, local->ps_sdata);
1366 } else if (conf->flags & IEEE80211_CONF_PS) {
1367 conf->flags &= ~IEEE80211_CONF_PS;
1368 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1369 del_timer_sync(&local->dynamic_ps_timer);
1370 cancel_work_sync(&local->dynamic_ps_enable_work);
1371 }
1372}
1373
808118cb
JY		 1374static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1375{
1376 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1377 struct sta_info *sta = NULL;
c2c98fde 1378 bool authorized = false;
808118cb
JY		 1379
1380 if (!mgd->powersave)
1381 return false;
1382
05cb9108
JB		 1383 if (mgd->broken_ap)
1384 return false;
1385
808118cb
JY		 1386 if (!mgd->associated)
1387 return false;
1388
808118cb
JY		 1389 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1390 IEEE80211_STA_CONNECTION_POLL))
1391 return false;
1392
1393 rcu_read_lock();
1394 sta = sta_info_get(sdata, mgd->bssid);
1395 if (sta)
c2c98fde 1396 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1397 rcu_read_unlock();
1398
c2c98fde 1399 return authorized;
808118cb
JY		 1400}
1401
965bedad 1402/* need to hold RTNL or interface lock */
10f644a4 1403void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1404{
1405 struct ieee80211_sub_if_data *sdata, *found = NULL;
1406 int count = 0;
195e294d 1407 int timeout;
965bedad
JB		 1408
1409 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1410 local->ps_sdata = NULL;
1411 return;
1412 }
1413
1414 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1415 if (!ieee80211_sdata_running(sdata))
965bedad 1416 continue;
8c7914de
RM		 1417 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1418 /* If an AP vif is found, then disable PS
1419 * by setting the count to zero thereby setting
1420 * ps_sdata to NULL.
1421 */
1422 count = 0;
1423 break;
1424 }
965bedad
JB		 1425 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1426 continue;
1427 found = sdata;
1428 count++;
1429 }
1430
808118cb 1431 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1432 s32 beaconint_us;
1433
1434 if (latency < 0)
ed77134b 1435 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1436
1437 beaconint_us = ieee80211_tu_to_usec(
1438 found->vif.bss_conf.beacon_int);
1439
ff616381 1440 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1441 if (timeout < 0) {
1442 /*
ff616381
JO		 1443 * Go to full PSM if the user configures a very low
1444 * latency requirement.
0ab82b04
EP		 1445 * The 2000 second value is there for compatibility
1446 * until the PM_QOS_NETWORK_LATENCY is configured
1447 * with real values.
195e294d 1448 */
0ab82b04
EP		 1449 if (latency > (1900 * USEC_PER_MSEC) &&
1450 latency != (2000 * USEC_PER_SEC))
195e294d 1451 timeout = 0;
ff616381
JO		 1452 else
1453 timeout = 100;
195e294d 1454 }
09b85568 1455 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1456
04fe2037 1457 if (beaconint_us > latency) {
10f644a4 1458 local->ps_sdata = NULL;
04fe2037 1459 } else {
04fe2037 1460 int maxslp = 1;
826262c3 1461 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1462
1463 /* If the TIM IE is invalid, pretend the value is 1 */
1464 if (!dtimper)
1465 dtimper = 1;
1466 else if (dtimper > 1)
04fe2037
JB		 1467 maxslp = min_t(int, dtimper,
1468 latency / beaconint_us);
1469
9ccebe61 1470 local->hw.conf.max_sleep_period = maxslp;
56007a02 1471 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1472 local->ps_sdata = found;
04fe2037 1473 }
10f644a4 1474 } else {
965bedad 1475 local->ps_sdata = NULL;
10f644a4 1476 }
965bedad
JB		 1477
1478 ieee80211_change_ps(local);
1479}
1480
ab095877
EP		 1481void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1482{
1483 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1484
1485 if (sdata->vif.bss_conf.ps != ps_allowed) {
1486 sdata->vif.bss_conf.ps = ps_allowed;
1487 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1488 }
1489}
1490
965bedad
JB		 1491void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1492{
1493 struct ieee80211_local *local =
1494 container_of(work, struct ieee80211_local,
1495 dynamic_ps_disable_work);
1496
1497 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1498 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1499 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1500 }
1501
1502 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1503 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1504 IEEE80211_QUEUE_STOP_REASON_PS);
1505}
1506
1507void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1508{
1509 struct ieee80211_local *local =
1510 container_of(work, struct ieee80211_local,
1511 dynamic_ps_enable_work);
1512 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1513 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1514 unsigned long flags;
1515 int q;
965bedad
JB		 1516
1517 /* can only happen when PS was just disabled anyway */
1518 if (!sdata)
1519 return;
1520
5e34069c
CL		 1521 ifmgd = &sdata->u.mgd;
1522
965bedad
JB		 1523 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1524 return;
1525
09b85568 1526 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1527 /* don't enter PS if TX frames are pending */
1528 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1529 mod_timer(&local->dynamic_ps_timer, jiffies +
1530 msecs_to_jiffies(
1531 local->hw.conf.dynamic_ps_timeout));
1532 return;
1533 }
77b7023a
AN		 1534
1535 /*
1536 * transmission can be stopped by others which leads to
1537 * dynamic_ps_timer expiry. Postpone the ps timer if it
1538 * is not the actual idle state.
1539 */
1540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1541 for (q = 0; q < local->hw.queues; q++) {
1542 if (local->queue_stop_reasons[q]) {
1543 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1544 flags);
1545 mod_timer(&local->dynamic_ps_timer, jiffies +
1546 msecs_to_jiffies(
1547 local->hw.conf.dynamic_ps_timeout));
1548 return;
1549 }
1550 }
1551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1552 }
1ddc2867 1553
375177bf 1554 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1555 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1556 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1557 mod_timer(&local->dynamic_ps_timer, jiffies +
1558 msecs_to_jiffies(
1559 local->hw.conf.dynamic_ps_timeout));
a1598383 1560 } else {
e8306f98
VN		 1561 ieee80211_send_nullfunc(local, sdata, 1);
1562 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1563 ieee80211_flush_queues(local, sdata);
e8306f98 1564 }
f3e85b9e
VN		 1565 }
1566
2a13052f
JO		 1567 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1568 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1569 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1570 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1571 local->hw.conf.flags |= IEEE80211_CONF_PS;
1572 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1573 }
965bedad
JB		 1574}
1575
1576void ieee80211_dynamic_ps_timer(unsigned long data)
1577{
1578 struct ieee80211_local *local = (void *) data;
1579
78f1a8b7 1580 if (local->quiescing || local->suspended)
5bb644a0
JB		 1581 return;
1582
42935eca 1583 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1584}
1585
164eb02d
SW		 1586void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1587{
1588 struct delayed_work *delayed_work =
1589 container_of(work, struct delayed_work, work);
1590 struct ieee80211_sub_if_data *sdata =
1591 container_of(delayed_work, struct ieee80211_sub_if_data,
1592 dfs_cac_timer_work);
1593
1594 ieee80211_vif_release_channel(sdata);
1595
1596 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1597}
1598
60f8b39c 1599/* MLME */
7d25745d 1600static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1601 struct ieee80211_sub_if_data *sdata,
4a3cb702 1602 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1603{
f0706e82 1604 struct ieee80211_tx_queue_params params;
4ced3f74 1605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1606 size_t left;
1607 int count;
4a3cb702
JB		 1608 const u8 *pos;
1609 u8 uapsd_queues = 0;
f0706e82 1610
e1b3ec1a 1611 if (!local->ops->conf_tx)
7d25745d 1612 return false;
e1b3ec1a 1613
32c5057b 1614 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1615 return false;
3434fbd3
JB		 1616
1617 if (!wmm_param)
7d25745d 1618 return false;
3434fbd3 1619
f0706e82 1620 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1621 return false;
ab13315a
KV		 1622
1623 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1624 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1625
f0706e82 1626 count = wmm_param[6] & 0x0f;
46900298 1627 if (count == ifmgd->wmm_last_param_set)
7d25745d 1628 return false;
46900298 1629 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1630
1631 pos = wmm_param + 8;
1632 left = wmm_param_len - 8;
1633
1634 memset(&params, 0, sizeof(params));
1635
00e96dec 1636 sdata->wmm_acm = 0;
f0706e82
JB		 1637 for (; left >= 4; left -= 4, pos += 4) {
1638 int aci = (pos[0] >> 5) & 0x03;
1639 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1640 bool uapsd = false;
f0706e82
JB		 1641 int queue;
1642
1643 switch (aci) {
0eeb59fe 1644 case 1: /* AC_BK */
e100bb64 1645 queue = 3;
988c0f72 1646 if (acm)
00e96dec 1647 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1648 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1649 uapsd = true;
f0706e82 1650 break;
0eeb59fe 1651 case 2: /* AC_VI */
e100bb64 1652 queue = 1;
988c0f72 1653 if (acm)
00e96dec 1654 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1656 uapsd = true;
f0706e82 1657 break;
0eeb59fe 1658 case 3: /* AC_VO */
e100bb64 1659 queue = 0;
988c0f72 1660 if (acm)
00e96dec 1661 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1662 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1663 uapsd = true;
f0706e82 1664 break;
0eeb59fe 1665 case 0: /* AC_BE */
f0706e82 1666 default:
e100bb64 1667 queue = 2;
988c0f72 1668 if (acm)
00e96dec 1669 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1670 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1671 uapsd = true;
f0706e82
JB		 1672 break;
1673 }
1674
1675 params.aifs = pos[0] & 0x0f;
1676 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1677 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1678 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1679 params.acm = acm;
ab13315a
KV		 1680 params.uapsd = uapsd;
1681
bdcbd8e0
JB		 1682 mlme_dbg(sdata,
1683 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1684 queue, aci, acm,
1685 params.aifs, params.cw_min, params.cw_max,
1686 params.txop, params.uapsd);
f6f3def3
EP		 1687 sdata->tx_conf[queue] = params;
1688 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1689 sdata_err(sdata,
1690 "failed to set TX queue parameters for queue %d\n",
1691 queue);
f0706e82 1692 }
e1b3ec1a
SG		 1693
1694 /* enable WMM or activate new settings */
4ced3f74 1695 sdata->vif.bss_conf.qos = true;
7d25745d 1696 return true;
f0706e82
JB		 1697}
1698
925e64c3
SG		 1699static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1700{
1701 lockdep_assert_held(&sdata->local->mtx);
1702
1703 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1704 IEEE80211_STA_BEACON_POLL);
1705 ieee80211_run_deferred_scan(sdata->local);
1706}
1707
1708static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1709{
1710 mutex_lock(&sdata->local->mtx);
1711 __ieee80211_stop_poll(sdata);
1712 mutex_unlock(&sdata->local->mtx);
1713}
1714
7a5158ef
JB		 1715static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1716 u16 capab, bool erp_valid, u8 erp)
5628221c 1717{
bda3933a 1718 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1719 u32 changed = 0;
7a5158ef
JB		 1720 bool use_protection;
1721 bool use_short_preamble;
1722 bool use_short_slot;
1723
1724 if (erp_valid) {
1725 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1726 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1727 } else {
1728 use_protection = false;
1729 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1730 }
1731
1732 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1733 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1734 use_short_slot = true;
5628221c 1735
471b3efd 1736 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1737 bss_conf->use_cts_prot = use_protection;
1738 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1739 }
7e9ed188 1740
d43c7b37 1741 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1742 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1743 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1744 }
d9430a32 1745
7a5158ef 1746 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1747 bss_conf->use_short_slot = use_short_slot;
1748 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1749 }
1750
1751 return changed;
1752}
1753
f698d856 1754static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1755 struct cfg80211_bss *cbss,
ae5eb026 1756 u32 bss_info_changed)
f0706e82 1757{
0c1ad2ca 1758 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1759 struct ieee80211_local *local = sdata->local;
68542962 1760 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1761
ae5eb026 1762 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1763 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1764 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1765
7ccc8bd7 1766 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1767 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1768
0c1ad2ca
JB		 1769 sdata->u.mgd.associated = cbss;
1770 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1771
17e4ec14
JM		 1772 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1773
488dd7b5 1774 if (sdata->vif.p2p) {
9caf0364 1775 const struct cfg80211_bss_ies *ies;
488dd7b5 1776
9caf0364
JB		 1777 rcu_read_lock();
1778 ies = rcu_dereference(cbss->ies);
1779 if (ies) {
9caf0364
JB		 1780 int ret;
1781
1782 ret = cfg80211_get_p2p_attr(
1783 ies->data, ies->len,
1784 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1785 (u8 *) &bss_conf->p2p_noa_attr,
1786 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1787 if (ret >= 2) {
67baf663
JD		 1788 sdata->u.mgd.p2p_noa_index =
1789 bss_conf->p2p_noa_attr.index;
9caf0364 1790 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1791 }
488dd7b5 1792 }
9caf0364 1793 rcu_read_unlock();
488dd7b5
JB		 1794 }
1795
b291ba11 1796 /* just to be sure */
925e64c3 1797 ieee80211_stop_poll(sdata);
b291ba11 1798
9ac19a90 1799 ieee80211_led_assoc(local, 1);
9306102e 1800
c65dd147 1801 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1802 /*
1803 * If the AP is buggy we may get here with no DTIM period
1804 * known, so assume it's 1 which is the only safe assumption
1805 * in that case, although if the TIM IE is broken powersave
1806 * probably just won't work at all.
1807 */
1808 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1809 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1810 } else {
e5b900d2 1811 bss_conf->dtim_period = 0;
826262c3 1812 }
e5b900d2 1813
68542962 1814 bss_conf->assoc = 1;
9cef8737 1815
a97c13c3 1816 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1817 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1818 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1819 bss_info_changed |= BSS_CHANGED_CQM;
1820
68542962 1821 /* Enable ARP filtering */
0f19b41e 1822 if (bss_conf->arp_addr_cnt)
68542962 1823 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1824
ae5eb026 1825 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1826
056508dc
JB		 1827 mutex_lock(&local->iflist_mtx);
1828 ieee80211_recalc_ps(local, -1);
1829 mutex_unlock(&local->iflist_mtx);
e0cb686f 1830
04ecd257 1831 ieee80211_recalc_smps(sdata);
ab095877
EP		 1832 ieee80211_recalc_ps_vif(sdata);
1833
9ac19a90 1834 netif_carrier_on(sdata->dev);
f0706e82
JB		 1835}
1836
e69e95db 1837static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1838 u16 stype, u16 reason, bool tx,
1839 u8 *frame_buf)
aa458d17 1840{
46900298 1841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1842 struct ieee80211_local *local = sdata->local;
3cc5240b 1843 u32 changed = 0;
aa458d17 1844
77fdaa12
JB		 1845 ASSERT_MGD_MTX(ifmgd);
1846
37ad3888
JB		 1847 if (WARN_ON_ONCE(tx && !frame_buf))
1848 return;
1849
b291ba11
JB		 1850 if (WARN_ON(!ifmgd->associated))
1851 return;
1852
79543d8e
DS		 1853 ieee80211_stop_poll(sdata);
1854
77fdaa12 1855 ifmgd->associated = NULL;
aa458d17
TW		 1856 netif_carrier_off(sdata->dev);
1857
88bc40e8
EP		 1858 /*
1859 * if we want to get out of ps before disassoc (why?) we have
1860 * to do it before sending disassoc, as otherwise the null-packet
1861 * won't be valid.
1862 */
1863 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1864 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1865 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1866 }
1867 local->ps_sdata = NULL;
1868
ab095877
EP		 1869 /* disable per-vif ps */
1870 ieee80211_recalc_ps_vif(sdata);
1871
f823981e
EP		 1872 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1873 if (tx)
39ecc01d 1874 ieee80211_flush_queues(local, sdata);
f823981e 1875
37ad3888
JB		 1876 /* deauthenticate/disassociate now */
1877 if (tx || frame_buf)
88a9e31c
EP		 1878 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1879 reason, tx, frame_buf);
37ad3888
JB		 1880
1881 /* flush out frame */
1882 if (tx)
39ecc01d 1883 ieee80211_flush_queues(local, sdata);
37ad3888 1884
88a9e31c
EP		 1885 /* clear bssid only after building the needed mgmt frames */
1886 memset(ifmgd->bssid, 0, ETH_ALEN);
1887
37ad3888 1888 /* remove AP and TDLS peers */
051007d9 1889 sta_info_flush_defer(sdata);
37ad3888
JB		 1890
1891 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1892 changed |= ieee80211_reset_erp_info(sdata);
1893
f5e5bf25 1894 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1895 changed |= BSS_CHANGED_ASSOC;
1896 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1897
67baf663
JD		 1898 ifmgd->p2p_noa_index = -1;
1899 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1900 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1901
dd5ecfea 1902 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1903 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1904 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1905 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1906 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1907
1ea6f9c0 1908 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1909
520eb820
KV		 1910 del_timer_sync(&local->dynamic_ps_timer);
1911 cancel_work_sync(&local->dynamic_ps_enable_work);
1912
68542962 1913 /* Disable ARP filtering */
0f19b41e 1914 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1915 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1916
3abead59
JB		 1917 sdata->vif.bss_conf.qos = false;
1918 changed |= BSS_CHANGED_QOS;
1919
0aaffa9b
JB		 1920 /* The BSSID (not really interesting) and HT changed */
1921 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1922 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1923
3abead59
JB		 1924 /* disassociated - set to defaults now */
1925 ieee80211_set_wmm_default(sdata, false);
1926
b9dcf712
JB		 1927 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1928 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1929 del_timer_sync(&sdata->u.mgd.timer);
1930 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1931
826262c3
JB		 1932 sdata->vif.bss_conf.dtim_period = 0;
1933
028e8da0
JB		 1934 ifmgd->flags = 0;
1935 ieee80211_vif_release_channel(sdata);
aa458d17 1936}
f0706e82 1937
3cf335d5
KV		 1938void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1939 struct ieee80211_hdr *hdr)
1940{
1941 /*
1942 * We can postpone the mgd.timer whenever receiving unicast frames
1943 * from AP because we know that the connection is working both ways
1944 * at that time. But multicast frames (and hence also beacons) must
1945 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1946 * data idle periods for sending the periodic probe request to the
1947 * AP we're connected to.
3cf335d5 1948 */
b291ba11
JB		 1949 if (is_multicast_ether_addr(hdr->addr1))
1950 return;
1951
be099e82 1952 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1953}
f0706e82 1954
4e5ff376
FF		 1955static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1956{
1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1958 struct ieee80211_local *local = sdata->local;
4e5ff376 1959
133d40f9 1960 mutex_lock(&local->mtx);
4e5ff376 1961 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1962 IEEE80211_STA_CONNECTION_POLL))) {
1963 mutex_unlock(&local->mtx);
1964 return;
1965 }
4e5ff376 1966
925e64c3 1967 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1968
1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local, -1);
1971 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1972
1973 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1974 goto out;
4e5ff376
FF		 1975
1976 /*
1977 * We've received a probe response, but are not sure whether
1978 * we have or will be receiving any beacons or data, so let's
1979 * schedule the timers again, just in case.
1980 */
1981 ieee80211_sta_reset_beacon_monitor(sdata);
1982
1983 mod_timer(&ifmgd->conn_mon_timer,
1984 round_jiffies_up(jiffies +
1985 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1986out:
133d40f9 1987 mutex_unlock(&local->mtx);
4e5ff376
FF		 1988}
1989
1990void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1991 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1992{
75706d0e 1993 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1994 return;
1995
4e5ff376
FF		 1996 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1997 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1998 if (ack)
cab1c7fd 1999 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2000 else
2001 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2002 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2003 return;
4e5ff376 2004 }
cab1c7fd
WD		 2005
2006 if (ack)
2007 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2008}
2009
a43abf29
ML		 2010static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2011{
2012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2013 const u8 *ssid;
f01a067d 2014 u8 *dst = ifmgd->associated->bssid;
180205bd 2015 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2016
2017 /*
2018 * Try sending broadcast probe requests for the last three
2019 * probe requests after the first ones failed since some
2020 * buggy APs only support broadcast probe requests.
2021 */
2022 if (ifmgd->probe_send_count >= unicast_limit)
2023 dst = NULL;
a43abf29 2024
4e5ff376
FF		 2025 /*
2026 * When the hardware reports an accurate Tx ACK status, it's
2027 * better to send a nullfunc frame instead of a probe request,
2028 * as it will kick us off the AP quickly if we aren't associated
2029 * anymore. The timeout will be reset if the frame is ACKed by
2030 * the AP.
2031 */
992e68bf
SD		 2032 ifmgd->probe_send_count++;
2033
04ac3c0e
FF		 2034 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2035 ifmgd->nullfunc_failed = false;
4e5ff376 2036 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2037 } else {
88c868c4
SG		 2038 int ssid_len;
2039
9caf0364 2040 rcu_read_lock();
4e5ff376 2041 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2042 if (WARN_ON_ONCE(ssid == NULL))
2043 ssid_len = 0;
2044 else
2045 ssid_len = ssid[1];
2046
2047 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2048 0, (u32) -1, true, 0,
55de908a 2049 ifmgd->associated->channel, false);
9caf0364 2050 rcu_read_unlock();
4e5ff376 2051 }
a43abf29 2052
180205bd 2053 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 2054 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 2055 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2056 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2057}
2058
b291ba11
JB		 2059static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2060 bool beacon)
04de8381 2061{
04de8381 2062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2063 bool already = false;
34bfc411 2064
9607e6b6 2065 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2066 return;
2067
77fdaa12
JB		 2068 mutex_lock(&ifmgd->mtx);
2069
2070 if (!ifmgd->associated)
2071 goto out;
2072
133d40f9
SG		 2073 mutex_lock(&sdata->local->mtx);
2074
2075 if (sdata->local->tmp_channel || sdata->local->scanning) {
2076 mutex_unlock(&sdata->local->mtx);
2077 goto out;
2078 }
2079
a13fbe54 2080 if (beacon) {
bdcbd8e0 2081 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2082 "detected beacon loss from AP (missed %d beacons) - probing\n",
2083 beacon_loss_count);
bdcbd8e0 2084
a13fbe54
BG		 2085 ieee80211_cqm_rssi_notify(&sdata->vif,
2086 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2087 GFP_KERNEL);
2088 }
04de8381 2089
b291ba11
JB		 2090 /*
2091 * The driver/our work has already reported this event or the
2092 * connection monitoring has kicked in and we have already sent
2093 * a probe request. Or maybe the AP died and the driver keeps
2094 * reporting until we disassociate...
2095 *
2096 * In either case we have to ignore the current call to this
2097 * function (except for setting the correct probe reason bit)
2098 * because otherwise we would reset the timer every time and
2099 * never check whether we received a probe response!
2100 */
2101 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2102 IEEE80211_STA_CONNECTION_POLL))
2103 already = true;
2104
2105 if (beacon)
2106 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2107 else
2108 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2109
133d40f9
SG		 2110 mutex_unlock(&sdata->local->mtx);
2111
b291ba11
JB		 2112 if (already)
2113 goto out;
2114
4e751843
JB		 2115 mutex_lock(&sdata->local->iflist_mtx);
2116 ieee80211_recalc_ps(sdata->local, -1);
2117 mutex_unlock(&sdata->local->iflist_mtx);
2118
a43abf29
ML		 2119 ifmgd->probe_send_count = 0;
2120 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2121 out:
2122 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2123}
2124
a619a4c0
JO		 2125struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2126 struct ieee80211_vif *vif)
2127{
2128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2130 struct cfg80211_bss *cbss;
a619a4c0
JO		 2131 struct sk_buff *skb;
2132 const u8 *ssid;
88c868c4 2133 int ssid_len;
a619a4c0
JO		 2134
2135 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2136 return NULL;
2137
2138 ASSERT_MGD_MTX(ifmgd);
2139
d9b3b28b
EP		 2140 if (ifmgd->associated)
2141 cbss = ifmgd->associated;
2142 else if (ifmgd->auth_data)
2143 cbss = ifmgd->auth_data->bss;
2144 else if (ifmgd->assoc_data)
2145 cbss = ifmgd->assoc_data->bss;
2146 else
a619a4c0
JO		 2147 return NULL;
2148
9caf0364 2149 rcu_read_lock();
d9b3b28b 2150 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2151 if (WARN_ON_ONCE(ssid == NULL))
2152 ssid_len = 0;
2153 else
2154 ssid_len = ssid[1];
2155
d9b3b28b 2156 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2157 (u32) -1, cbss->channel,
6b77863b 2158 ssid + 2, ssid_len,
85a237fe 2159 NULL, 0, true);
9caf0364 2160 rcu_read_unlock();
a619a4c0
JO		 2161
2162 return skb;
2163}
2164EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2165
eef9e54c 2166static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2167{
2168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2169 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2170
2171 mutex_lock(&ifmgd->mtx);
2172 if (!ifmgd->associated) {
2173 mutex_unlock(&ifmgd->mtx);
2174 return;
2175 }
2176
37ad3888
JB		 2177 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2178 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2179 true, frame_buf);
882a7c69 2180 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2181 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2182 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2183 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2184 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2185
1e4dcd01
JO		 2186 /*
2187 * must be outside lock due to cfg80211,
2188 * but that's not a problem.
2189 */
6ae16775 2190 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2191}
2192
cc74c0c7 2193static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2194{
2195 struct ieee80211_sub_if_data *sdata =
2196 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2197 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2199 struct sta_info *sta;
2200
2201 if (ifmgd->associated) {
30fa9047 2202 rcu_read_lock();
a85e1d55
PS		 2203 sta = sta_info_get(sdata, ifmgd->bssid);
2204 if (sta)
2205 sta->beacon_loss_count++;
30fa9047 2206 rcu_read_unlock();
a85e1d55 2207 }
b291ba11 2208
682bd38b 2209 if (ifmgd->connection_loss) {
882a7c69
JB		 2210 sdata_info(sdata, "Connection to AP %pM lost\n",
2211 ifmgd->bssid);
eef9e54c 2212 __ieee80211_disconnect(sdata);
882a7c69 2213 } else {
1e4dcd01 2214 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2215 }
2216}
2217
2218static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2219{
2220 struct ieee80211_sub_if_data *sdata =
2221 container_of(work, struct ieee80211_sub_if_data,
2222 u.mgd.csa_connection_drop_work);
2223
eef9e54c 2224 __ieee80211_disconnect(sdata);
b291ba11
JB		 2225}
2226
04de8381
KV		 2227void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2228{
2229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2230 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2231
b5878a2d
JB		 2232 trace_api_beacon_loss(sdata);
2233
682bd38b 2234 sdata->u.mgd.connection_loss = false;
1e4dcd01 2235 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2236}
2237EXPORT_SYMBOL(ieee80211_beacon_loss);
2238
1e4dcd01
JO		 2239void ieee80211_connection_loss(struct ieee80211_vif *vif)
2240{
2241 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2242 struct ieee80211_hw *hw = &sdata->local->hw;
2243
b5878a2d
JB		 2244 trace_api_connection_loss(sdata);
2245
682bd38b 2246 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2247 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2248}
2249EXPORT_SYMBOL(ieee80211_connection_loss);
2250
2251
66e67e41
JB		 2252static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2253 bool assoc)
2254{
2255 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2256
2257 lockdep_assert_held(&sdata->u.mgd.mtx);
2258
66e67e41
JB		 2259 if (!assoc) {
2260 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2261
2262 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2263 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2264 sdata->u.mgd.flags = 0;
55de908a 2265 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2266 }
2267
5b112d3d 2268 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2269 kfree(auth_data);
2270 sdata->u.mgd.auth_data = NULL;
2271}
2272
2273static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2274 struct ieee80211_mgmt *mgmt, size_t len)
2275{
1672c0e3 2276 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2277 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2278 u8 *pos;
2279 struct ieee802_11_elems elems;
1672c0e3 2280 u32 tx_flags = 0;
66e67e41
JB		 2281
2282 pos = mgmt->u.auth.variable;
b2e506bf 2283 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2284 if (!elems.challenge)
2285 return;
2286 auth_data->expected_transaction = 4;
a1845fc7 2287 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2288 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2289 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2290 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2291 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2292 elems.challenge - 2, elems.challenge_len + 2,
2293 auth_data->bss->bssid, auth_data->bss->bssid,
2294 auth_data->key, auth_data->key_len,
1672c0e3 2295 auth_data->key_idx, tx_flags);
66e67e41
JB		 2296}
2297
2298static enum rx_mgmt_action __must_check
2299ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2300 struct ieee80211_mgmt *mgmt, size_t len)
2301{
2302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2303 u8 bssid[ETH_ALEN];
2304 u16 auth_alg, auth_transaction, status_code;
2305 struct sta_info *sta;
2306
2307 lockdep_assert_held(&ifmgd->mtx);
2308
2309 if (len < 24 + 6)
2310 return RX_MGMT_NONE;
2311
2312 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2313 return RX_MGMT_NONE;
2314
2315 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2316
b203ca39 2317 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2318 return RX_MGMT_NONE;
2319
2320 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2321 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2322 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2323
2324 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2325 auth_transaction != ifmgd->auth_data->expected_transaction) {
2326 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2327 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2328 auth_transaction,
2329 ifmgd->auth_data->expected_transaction);
66e67e41 2330 return RX_MGMT_NONE;
0f4126e8 2331 }
66e67e41
JB		 2332
2333 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2334 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2335 mgmt->sa, status_code);
dac211ec
EP		 2336 ieee80211_destroy_auth_data(sdata, false);
2337 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2338 }
2339
2340 switch (ifmgd->auth_data->algorithm) {
2341 case WLAN_AUTH_OPEN:
2342 case WLAN_AUTH_LEAP:
2343 case WLAN_AUTH_FT:
6b8ece3a 2344 case WLAN_AUTH_SAE:
66e67e41
JB		 2345 break;
2346 case WLAN_AUTH_SHARED_KEY:
2347 if (ifmgd->auth_data->expected_transaction != 4) {
2348 ieee80211_auth_challenge(sdata, mgmt, len);
2349 /* need another frame */
2350 return RX_MGMT_NONE;
2351 }
2352 break;
2353 default:
2354 WARN_ONCE(1, "invalid auth alg %d",
2355 ifmgd->auth_data->algorithm);
2356 return RX_MGMT_NONE;
2357 }
2358
bdcbd8e0 2359 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2360 ifmgd->auth_data->done = true;
2361 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2362 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2363 run_again(ifmgd, ifmgd->auth_data->timeout);
2364
6b8ece3a
JM		 2365 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2366 ifmgd->auth_data->expected_transaction != 2) {
2367 /*
2368 * Report auth frame to user space for processing since another
2369 * round of Authentication frames is still needed.
2370 */
2371 return RX_MGMT_CFG80211_RX_AUTH;
2372 }
2373
66e67e41
JB		 2374 /* move station state to auth */
2375 mutex_lock(&sdata->local->sta_mtx);
2376 sta = sta_info_get(sdata, bssid);
2377 if (!sta) {
2378 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2379 goto out_err;
2380 }
2381 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2382 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2383 goto out_err;
2384 }
2385 mutex_unlock(&sdata->local->sta_mtx);
2386
2387 return RX_MGMT_CFG80211_RX_AUTH;
2388 out_err:
2389 mutex_unlock(&sdata->local->sta_mtx);
2390 /* ignore frame -- wait for timeout */
2391 return RX_MGMT_NONE;
2392}
2393
2394
77fdaa12
JB		 2395static enum rx_mgmt_action __must_check
2396ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2397 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2398{
46900298 2399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2400 const u8 *bssid = NULL;
f0706e82
JB		 2401 u16 reason_code;
2402
66e67e41
JB		 2403 lockdep_assert_held(&ifmgd->mtx);
2404
f4ea83dd 2405 if (len < 24 + 2)
77fdaa12 2406 return RX_MGMT_NONE;
f0706e82 2407
66e67e41 2408 if (!ifmgd->associated ||
b203ca39 2409 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2410 return RX_MGMT_NONE;
77fdaa12 2411
0c1ad2ca 2412 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2413
2414 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2415
bdcbd8e0
JB		 2416 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2417 bssid, reason_code);
77fdaa12 2418
37ad3888
JB		 2419 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2420
77fdaa12 2421 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2422}
2423
2424
77fdaa12
JB		 2425static enum rx_mgmt_action __must_check
2426ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2427 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2428{
46900298 2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2430 u16 reason_code;
2431
66e67e41 2432 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2433
66e67e41 2434 if (len < 24 + 2)
77fdaa12
JB		 2435 return RX_MGMT_NONE;
2436
66e67e41 2437 if (!ifmgd->associated ||
b203ca39 2438 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2439 return RX_MGMT_NONE;
f0706e82
JB		 2440
2441 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2442
bdcbd8e0
JB		 2443 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2444 mgmt->sa, reason_code);
f0706e82 2445
37ad3888
JB		 2446 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2447
77fdaa12 2448 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2449}
2450
c74d084f
CL		 2451static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2452 u8 *supp_rates, unsigned int supp_rates_len,
2453 u32 *rates, u32 *basic_rates,
2454 bool *have_higher_than_11mbit,
2455 int *min_rate, int *min_rate_index)
2456{
2457 int i, j;
2458
2459 for (i = 0; i < supp_rates_len; i++) {
2460 int rate = (supp_rates[i] & 0x7f) * 5;
2461 bool is_basic = !!(supp_rates[i] & 0x80);
2462
2463 if (rate > 110)
2464 *have_higher_than_11mbit = true;
2465
2466 /*
2467 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2468 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2469 *
2470 * Note: Even through the membership selector and the basic
2471 * rate flag share the same bit, they are not exactly
2472 * the same.
2473 */
2474 if (!!(supp_rates[i] & 0x80) &&
2475 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2476 continue;
2477
2478 for (j = 0; j < sband->n_bitrates; j++) {
2479 if (sband->bitrates[j].bitrate == rate) {
2480 *rates |= BIT(j);
2481 if (is_basic)
2482 *basic_rates |= BIT(j);
2483 if (rate < *min_rate) {
2484 *min_rate = rate;
2485 *min_rate_index = j;
2486 }
2487 break;
2488 }
2489 }
2490 }
2491}
f0706e82 2492
66e67e41
JB		 2493static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2494 bool assoc)
2495{
2496 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2497
2498 lockdep_assert_held(&sdata->u.mgd.mtx);
2499
66e67e41
JB		 2500 if (!assoc) {
2501 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2502
2503 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2505 sdata->u.mgd.flags = 0;
55de908a 2506 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2507 }
2508
2509 kfree(assoc_data);
2510 sdata->u.mgd.assoc_data = NULL;
2511}
2512
2513static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2514 struct cfg80211_bss *cbss,
af6b6374 2515 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2516{
46900298 2517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2518 struct ieee80211_local *local = sdata->local;
8318d78a 2519 struct ieee80211_supported_band *sband;
f0706e82 2520 struct sta_info *sta;
af6b6374 2521 u8 *pos;
af6b6374 2522 u16 capab_info, aid;
f0706e82 2523 struct ieee802_11_elems elems;
bda3933a 2524 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2525 u32 changed = 0;
c74d084f 2526 int err;
f0706e82 2527
af6b6374 2528 /* AssocResp and ReassocResp have identical structure */
f0706e82 2529
f0706e82 2530 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2531 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2532
1dd84aa2 2533 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2534 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2535 aid);
1dd84aa2
JB		 2536 aid &= ~(BIT(15) | BIT(14));
2537
05cb9108
JB		 2538 ifmgd->broken_ap = false;
2539
2540 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2541 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2542 aid);
05cb9108
JB		 2543 aid = 0;
2544 ifmgd->broken_ap = true;
2545 }
2546
af6b6374 2547 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2548 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2549
f0706e82 2550 if (!elems.supp_rates) {
bdcbd8e0 2551 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2552 return false;
f0706e82
JB		 2553 }
2554
46900298 2555 ifmgd->aid = aid;
f0706e82 2556
30eb1dc2
JB		 2557 /*
2558 * We previously checked these in the beacon/probe response, so
2559 * they should be present here. This is just a safety net.
2560 */
2561 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2562 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2563 sdata_info(sdata,
2564 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2565 return false;
2566 }
2567
2568 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2569 (!elems.vht_cap_elem || !elems.vht_operation)) {
2570 sdata_info(sdata,
2571 "VHT AP is missing VHT capability/operation in AssocResp\n");
2572 return false;
2573 }
2574
2a33bee2
GE		 2575 mutex_lock(&sdata->local->sta_mtx);
2576 /*
2577 * station info was already allocated and inserted before
2578 * the association and should be available to us
2579 */
7852e361 2580 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2581 if (WARN_ON(!sta)) {
2582 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2583 return false;
77fdaa12 2584 }
05e5e883 2585
55de908a 2586 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2587
30eb1dc2 2588 /* Set up internal HT/VHT capabilities */
a8243b72 2589 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2590 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2591 elems.ht_cap_elem, sta);
64f68e5d 2592
818255ea
MP		 2593 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2594 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2595 elems.vht_cap_elem, sta);
818255ea 2596
30eb1dc2
JB		 2597 /*
2598 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2599 * in their association response, so ignore that data for our own
2600 * configuration. If it changed since the last beacon, we'll get the
2601 * next beacon and update then.
2602 */
1128958d 2603
bee7f586
JB		 2604 /*
2605 * If an operating mode notification IE is present, override the
2606 * NSS calculation (that would be done in rate_control_rate_init())
2607 * and use the # of streams from that element.
2608 */
2609 if (elems.opmode_notif &&
2610 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2611 u8 nss;
2612
2613 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2614 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2615 nss += 1;
2616 sta->sta.rx_nss = nss;
2617 }
2618
4b7679a5 2619 rate_control_rate_init(sta);
f0706e82 2620
46900298 2621 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2622 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2623
ddf4ac53 2624 if (elems.wmm_param)
c2c98fde 2625 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2626
3e4d40fa 2627 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2628 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2629 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2630 if (err) {
bdcbd8e0
JB		 2631 sdata_info(sdata,
2632 "failed to move station %pM to desired state\n",
2633 sta->sta.addr);
c8987876
JB		 2634 WARN_ON(__sta_info_destroy(sta));
2635 mutex_unlock(&sdata->local->sta_mtx);
2636 return false;
2637 }
2638
7852e361 2639 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2640
f2176d72
JO		 2641 /*
2642 * Always handle WMM once after association regardless
2643 * of the first value the AP uses. Setting -1 here has
2644 * that effect because the AP values is an unsigned
2645 * 4-bit value.
2646 */
2647 ifmgd->wmm_last_param_set = -1;
2648
ddf4ac53 2649 if (elems.wmm_param)
4ced3f74 2650 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2651 elems.wmm_param_len);
aa837e1d 2652 else
3abead59
JB		 2653 ieee80211_set_wmm_default(sdata, false);
2654 changed |= BSS_CHANGED_QOS;
f0706e82 2655
60f8b39c
JB		 2656 /* set AID and assoc capability,
2657 * ieee80211_set_associated() will tell the driver */
2658 bss_conf->aid = aid;
2659 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2660 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2661
d524215f
FF		 2662 /*
2663 * If we're using 4-addr mode, let the AP know that we're
2664 * doing so, so that it can create the STA VLAN on its side
2665 */
2666 if (ifmgd->use_4addr)
2667 ieee80211_send_4addr_nullfunc(local, sdata);
2668
15b7b062 2669 /*
b291ba11
JB		 2670 * Start timer to probe the connection to the AP now.
2671 * Also start the timer that will detect beacon loss.
15b7b062 2672 */
b291ba11 2673 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2674 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2675
af6b6374 2676 return true;
f0706e82
JB		 2677}
2678
66e67e41
JB		 2679static enum rx_mgmt_action __must_check
2680ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2681 struct ieee80211_mgmt *mgmt, size_t len,
2682 struct cfg80211_bss **bss)
2683{
2684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2685 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2686 u16 capab_info, status_code, aid;
2687 struct ieee802_11_elems elems;
2688 u8 *pos;
2689 bool reassoc;
2690
2691 lockdep_assert_held(&ifmgd->mtx);
2692
2693 if (!assoc_data)
2694 return RX_MGMT_NONE;
b203ca39 2695 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2696 return RX_MGMT_NONE;
2697
2698 /*
2699 * AssocResp and ReassocResp have identical structure, so process both
2700 * of them in this function.
2701 */
2702
2703 if (len < 24 + 6)
2704 return RX_MGMT_NONE;
2705
2706 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2707 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2708 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2709 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2710
bdcbd8e0
JB		 2711 sdata_info(sdata,
2712 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2713 reassoc ? "Rea" : "A", mgmt->sa,
2714 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2715
2716 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2717 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2718
2719 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2720 elems.timeout_int &&
2721 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2722 u32 tu, ms;
79ba1d89 2723 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2724 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2725 sdata_info(sdata,
2726 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2727 mgmt->sa, tu, ms);
66e67e41 2728 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2729 assoc_data->timeout_started = true;
66e67e41
JB		 2730 if (ms > IEEE80211_ASSOC_TIMEOUT)
2731 run_again(ifmgd, assoc_data->timeout);
2732 return RX_MGMT_NONE;
2733 }
2734
2735 *bss = assoc_data->bss;
2736
2737 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2738 sdata_info(sdata, "%pM denied association (code=%d)\n",
2739 mgmt->sa, status_code);
66e67e41
JB		 2740 ieee80211_destroy_assoc_data(sdata, false);
2741 } else {
66e67e41
JB		 2742 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2743 /* oops -- internal error -- send timeout for now */
10a9109f 2744 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2745 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2746 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2747 }
635d999f 2748 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2749
2750 /*
2751 * destroy assoc_data afterwards, as otherwise an idle
2752 * recalc after assoc_data is NULL but before associated
2753 * is set can cause the interface to go idle
2754 */
2755 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2756 }
2757
2758 return RX_MGMT_CFG80211_RX_ASSOC;
2759}
8e3c1b77 2760
98c8fccf 2761static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2762 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2763 struct ieee80211_rx_status *rx_status,
d45c4172 2764 struct ieee802_11_elems *elems)
98c8fccf
JB		 2765{
2766 struct ieee80211_local *local = sdata->local;
2767 int freq;
c2b13452 2768 struct ieee80211_bss *bss;
98c8fccf 2769 struct ieee80211_channel *channel;
56007a02
JB		 2770 bool need_ps = false;
2771
b4f286a1
JB		 2772 lockdep_assert_held(&sdata->u.mgd.mtx);
2773
826262c3
JB		 2774 if ((sdata->u.mgd.associated &&
2775 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2776 (sdata->u.mgd.assoc_data &&
2777 ether_addr_equal(mgmt->bssid,
2778 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2779 /* not previously set so we may need to recalc */
826262c3
JB		 2780 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2781
2782 if (elems->tim && !elems->parse_error) {
4a3cb702 2783 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2784 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2785 }
56007a02 2786 }
98c8fccf 2787
1cd8e88e 2788 if (elems->ds_params)
59eb21a6
BR		 2789 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2790 rx_status->band);
98c8fccf
JB		 2791 else
2792 freq = rx_status->freq;
2793
2794 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2795
2796 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2797 return;
2798
98c8fccf 2799 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2800 channel);
77fdaa12
JB		 2801 if (bss)
2802 ieee80211_rx_bss_put(local, bss);
2803
37799e52
JB		 2804 if (!sdata->u.mgd.associated ||
2805 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
98c8fccf
JB		 2806 return;
2807
56007a02
JB		 2808 if (need_ps) {
2809 mutex_lock(&local->iflist_mtx);
2810 ieee80211_recalc_ps(local, -1);
2811 mutex_unlock(&local->iflist_mtx);
2812 }
2813
04a161f4
JB		 2814 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2815 elems, true);
b4f286a1 2816
f0706e82
JB		 2817}
2818
2819
f698d856 2820static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2821 struct sk_buff *skb)
f0706e82 2822{
af6b6374 2823 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2824 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2825 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2826 size_t baselen, len = skb->len;
ae6a44e3
EK		 2827 struct ieee802_11_elems elems;
2828
15b7b062
KV		 2829 ifmgd = &sdata->u.mgd;
2830
77fdaa12
JB		 2831 ASSERT_MGD_MTX(ifmgd);
2832
b203ca39 2833 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2834 return; /* ignore ProbeResp to foreign address */
2835
ae6a44e3
EK		 2836 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2837 if (baselen > len)
2838 return;
2839
2840 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2841 false, &elems);
ae6a44e3 2842
d45c4172 2843 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2844
77fdaa12 2845 if (ifmgd->associated &&
b203ca39 2846 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2847 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2848
2849 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2850 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2851 /* got probe response, continue with auth */
bdcbd8e0 2852 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2853 ifmgd->auth_data->tries = 0;
2854 ifmgd->auth_data->timeout = jiffies;
89afe614 2855 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2856 run_again(ifmgd, ifmgd->auth_data->timeout);
2857 }
f0706e82
JB		 2858}
2859
d91f36db
JB		 2860/*
2861 * This is the canonical list of information elements we care about,
2862 * the filter code also gives us all changes to the Microsoft OUI
2863 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2864 *
2865 * We implement beacon filtering in software since that means we can
2866 * avoid processing the frame here and in cfg80211, and userspace
2867 * will not be able to tell whether the hardware supports it or not.
2868 *
2869 * XXX: This list needs to be dynamic -- userspace needs to be able to
2870 * add items it requires. It also needs to be able to tell us to
2871 * look out for other vendor IEs.
2872 */
2873static const u64 care_about_ies =
1d4df3a5
JB		 2874 (1ULL << WLAN_EID_COUNTRY) |
2875 (1ULL << WLAN_EID_ERP_INFO) |
2876 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2877 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2878 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2879 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2880
30eb1dc2
JB		 2881static enum rx_mgmt_action
2882ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2883 struct ieee80211_mgmt *mgmt, size_t len,
2884 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2885{
d91f36db 2886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2887 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2888 size_t baselen;
2889 struct ieee802_11_elems elems;
f698d856 2890 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2891 struct ieee80211_chanctx_conf *chanctx_conf;
2892 struct ieee80211_channel *chan;
bee7f586 2893 struct sta_info *sta;
471b3efd 2894 u32 changed = 0;
f87ad637 2895 bool erp_valid;
7a5158ef 2896 u8 erp_value = 0;
d91f36db 2897 u32 ncrc;
77fdaa12
JB		 2898 u8 *bssid;
2899
66e67e41 2900 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2901
ae6a44e3
EK		 2902 /* Process beacon from the current BSS */
2903 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2904 if (baselen > len)
30eb1dc2 2905 return RX_MGMT_NONE;
ae6a44e3 2906
55de908a
JB		 2907 rcu_read_lock();
2908 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2909 if (!chanctx_conf) {
2910 rcu_read_unlock();
30eb1dc2 2911 return RX_MGMT_NONE;
55de908a
JB		 2912 }
2913
4bf88530 2914 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2915 rcu_read_unlock();
30eb1dc2 2916 return RX_MGMT_NONE;
55de908a 2917 }
4bf88530 2918 chan = chanctx_conf->def.chan;
55de908a 2919 rcu_read_unlock();
f0706e82 2920
c65dd147 2921 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2922 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2923 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2924 len - baselen, false, &elems);
77fdaa12 2925
d45c4172 2926 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2927 ifmgd->assoc_data->have_beacon = true;
c65dd147 2928 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2929 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2930 sdata->vif.bss_conf.sync_tsf =
2931 le64_to_cpu(mgmt->u.beacon.timestamp);
2932 sdata->vif.bss_conf.sync_device_ts =
2933 rx_status->device_timestamp;
2934 if (elems.tim)
2935 sdata->vif.bss_conf.sync_dtim_count =
2936 elems.tim->dtim_count;
2937 else
2938 sdata->vif.bss_conf.sync_dtim_count = 0;
2939 }
66e67e41
JB		 2940 /* continue assoc process */
2941 ifmgd->assoc_data->timeout = jiffies;
89afe614 2942 ifmgd->assoc_data->timeout_started = true;
66e67e41 2943 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2944 return RX_MGMT_NONE;
66e67e41 2945 }
77fdaa12 2946
66e67e41 2947 if (!ifmgd->associated ||
b203ca39 2948 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2949 return RX_MGMT_NONE;
66e67e41 2950 bssid = ifmgd->associated->bssid;
f0706e82 2951
17e4ec14
JM		 2952 /* Track average RSSI from the Beacon frames of the current AP */
2953 ifmgd->last_beacon_signal = rx_status->signal;
2954 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2955 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2956 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2957 ifmgd->last_cqm_event_signal = 0;
391a200a 2958 ifmgd->count_beacon_signal = 1;
615f7b9b 2959 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2960 } else {
2961 ifmgd->ave_beacon_signal =
2962 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2963 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2964 ifmgd->ave_beacon_signal) / 16;
391a200a 2965 ifmgd->count_beacon_signal++;
17e4ec14 2966 }
615f7b9b
MV		 2967
2968 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2969 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2970 int sig = ifmgd->ave_beacon_signal;
2971 int last_sig = ifmgd->last_ave_beacon_signal;
2972
2973 /*
2974 * if signal crosses either of the boundaries, invoke callback
2975 * with appropriate parameters
2976 */
2977 if (sig > ifmgd->rssi_max_thold &&
2978 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2979 ifmgd->last_ave_beacon_signal = sig;
887da917 2980 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2981 } else if (sig < ifmgd->rssi_min_thold &&
2982 (last_sig >= ifmgd->rssi_max_thold ||
2983 last_sig == 0)) {
2984 ifmgd->last_ave_beacon_signal = sig;
887da917 2985 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2986 }
2987 }
2988
17e4ec14 2989 if (bss_conf->cqm_rssi_thold &&
391a200a 2990 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2991 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2992 int sig = ifmgd->ave_beacon_signal / 16;
2993 int last_event = ifmgd->last_cqm_event_signal;
2994 int thold = bss_conf->cqm_rssi_thold;
2995 int hyst = bss_conf->cqm_rssi_hyst;
2996 if (sig < thold &&
2997 (last_event == 0 || sig < last_event - hyst)) {
2998 ifmgd->last_cqm_event_signal = sig;
2999 ieee80211_cqm_rssi_notify(
3000 &sdata->vif,
3001 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3002 GFP_KERNEL);
3003 } else if (sig > thold &&
3004 (last_event == 0 || sig > last_event + hyst)) {
3005 ifmgd->last_cqm_event_signal = sig;
3006 ieee80211_cqm_rssi_notify(
3007 &sdata->vif,
3008 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3009 GFP_KERNEL);
3010 }
3011 }
3012
b291ba11 3013 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 3014 mlme_dbg_ratelimited(sdata,
112c31f0 3015 "cancelling AP probe due to a received beacon\n");
925e64c3 3016 mutex_lock(&local->mtx);
b291ba11 3017 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 3018 ieee80211_run_deferred_scan(local);
3019 mutex_unlock(&local->mtx);
3020
4e751843
JB		 3021 mutex_lock(&local->iflist_mtx);
3022 ieee80211_recalc_ps(local, -1);
3023 mutex_unlock(&local->iflist_mtx);
92778180
JM		 3024 }
3025
b291ba11
JB		 3026 /*
3027 * Push the beacon loss detection into the future since
3028 * we are processing a beacon from the AP just now.
3029 */
d3a910a8 3030 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3031
d91f36db
JB		 3032 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3033 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3034 len - baselen, false, &elems,
d91f36db
JB		 3035 care_about_ies, ncrc);
3036
25c9c875 3037 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3038 bool directed_tim = ieee80211_check_tim(elems.tim,
3039 elems.tim_len,
3040 ifmgd->aid);
1fb3606b 3041 if (directed_tim) {
572e0012 3042 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3043 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3044 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3045 ieee80211_hw_config(local,
3046 IEEE80211_CONF_CHANGE_PS);
3047 }
572e0012 3048 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3049 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3050 local->pspolling = true;
3051
3052 /*
3053 * Here is assumed that the driver will be
3054 * able to send ps-poll frame and receive a
3055 * response even though power save mode is
3056 * enabled, but some drivers might require
3057 * to disable power save here. This needs
3058 * to be investigated.
3059 */
3060 ieee80211_send_pspoll(local, sdata);
3061 }
a97b77b9
VN		 3062 }
3063 }
7a5158ef 3064
488dd7b5 3065 if (sdata->vif.p2p) {
67baf663 3066 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3067 int ret;
3068
3069 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3070 len - baselen,
3071 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3072 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3073 if (ret >= 2) {
3074 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3075 /* valid noa_attr and index changed */
3076 sdata->u.mgd.p2p_noa_index = noa.index;
3077 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3078 changed |= BSS_CHANGED_P2P_PS;
3079 /*
3080 * make sure we update all information, the CRC
3081 * mechanism doesn't look at P2P attributes.
3082 */
3083 ifmgd->beacon_crc_valid = false;
3084 }
3085 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3086 /* noa_attr not found and we had valid noa_attr before */
3087 sdata->u.mgd.p2p_noa_index = -1;
3088 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3089 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3090 ifmgd->beacon_crc_valid = false;
3091 }
3092 }
3093
d8ec4433 3094 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 3095 return RX_MGMT_NONE;
30196673 3096 ifmgd->beacon_crc = ncrc;
d8ec4433 3097 ifmgd->beacon_crc_valid = true;
30196673 3098
d45c4172 3099 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 3100
3101 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3102 elems.wmm_param_len))
3103 changed |= BSS_CHANGED_QOS;
3104
c65dd147
EG		 3105 /*
3106 * If we haven't had a beacon before, tell the driver about the
ef429dad 3107 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3108 */
3109 if (!bss_conf->dtim_period) {
3110 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3111 if (elems.tim)
3112 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3113 else
3114 bss_conf->dtim_period = 1;
ef429dad
JB		 3115
3116 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3117 sdata->vif.bss_conf.sync_tsf =
3118 le64_to_cpu(mgmt->u.beacon.timestamp);
3119 sdata->vif.bss_conf.sync_device_ts =
3120 rx_status->device_timestamp;
3121 if (elems.tim)
3122 sdata->vif.bss_conf.sync_dtim_count =
3123 elems.tim->dtim_count;
3124 else
3125 sdata->vif.bss_conf.sync_dtim_count = 0;
3126 }
3127
c65dd147
EG		 3128 changed |= BSS_CHANGED_DTIM_PERIOD;
3129 }
3130
1946bed9 3131 if (elems.erp_info) {
7a5158ef
JB		 3132 erp_valid = true;
3133 erp_value = elems.erp_info[0];
3134 } else {
3135 erp_valid = false;
50c4afb9 3136 }
7a5158ef
JB		 3137 changed |= ieee80211_handle_bss_capability(sdata,
3138 le16_to_cpu(mgmt->u.beacon.capab_info),
3139 erp_valid, erp_value);
f0706e82 3140
1128958d 3141 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3142 sta = sta_info_get(sdata, bssid);
3143
30eb1dc2
JB		 3144 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3145 elems.vht_operation, bssid, &changed)) {
3146 mutex_unlock(&local->sta_mtx);
3147 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3148 WLAN_REASON_DEAUTH_LEAVING,
3149 true, deauth_buf);
3150 return RX_MGMT_CFG80211_TX_DEAUTH;
3151 }
bee7f586
JB		 3152
3153 if (sta && elems.opmode_notif)
3154 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3155 rx_status->band, true);
1128958d 3156 mutex_unlock(&local->sta_mtx);
d3c990fb 3157
04b7b2ff
JB		 3158 if (elems.country_elem && elems.pwr_constr_elem &&
3159 mgmt->u.probe_resp.capab_info &
3160 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3161 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3162 elems.country_elem,
3163 elems.country_elem_len,
3164 elems.pwr_constr_elem);
3f2355cb 3165
471b3efd 3166 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3167
3168 return RX_MGMT_NONE;
f0706e82
JB		 3169}
3170
1fa57d01
JB		 3171void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3172 struct sk_buff *skb)
f0706e82 3173{
77fdaa12 3174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3175 struct ieee80211_rx_status *rx_status;
f0706e82 3176 struct ieee80211_mgmt *mgmt;
66e67e41 3177 struct cfg80211_bss *bss = NULL;
77fdaa12 3178 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3179 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82 3180 u16 fc;
1b3a2e49
JB		 3181 struct ieee802_11_elems elems;
3182 int ies_len;
f0706e82 3183
f0706e82
JB		 3184 rx_status = (struct ieee80211_rx_status *) skb->cb;
3185 mgmt = (struct ieee80211_mgmt *) skb->data;
3186 fc = le16_to_cpu(mgmt->frame_control);
3187
77fdaa12
JB		 3188 mutex_lock(&ifmgd->mtx);
3189
66e67e41
JB		 3190 switch (fc & IEEE80211_FCTL_STYPE) {
3191 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3192 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3193 deauth_buf, rx_status);
66e67e41
JB		 3194 break;
3195 case IEEE80211_STYPE_PROBE_RESP:
3196 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3197 break;
3198 case IEEE80211_STYPE_AUTH:
3199 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3200 break;
3201 case IEEE80211_STYPE_DEAUTH:
3202 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3203 break;
3204 case IEEE80211_STYPE_DISASSOC:
3205 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3206 break;
3207 case IEEE80211_STYPE_ASSOC_RESP:
3208 case IEEE80211_STYPE_REASSOC_RESP:
3209 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3210 break;
3211 case IEEE80211_STYPE_ACTION:
37799e52 3212 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3213 ies_len = skb->len -
3214 offsetof(struct ieee80211_mgmt,
3215 u.action.u.chan_switch.variable);
37799e52
JB		 3216
3217 if (ies_len < 0)
3218 break;
3219
3220 ieee802_11_parse_elems(
3221 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3222 ies_len, true, &elems);
37799e52
JB		 3223
3224 if (elems.parse_error)
3225 break;
3226
1b3a2e49
JB		 3227 ieee80211_sta_process_chanswitch(sdata,
3228 rx_status->mactime,
04a161f4 3229 &elems, false);
1b3a2e49
JB		 3230 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3231 ies_len = skb->len -
3232 offsetof(struct ieee80211_mgmt,
3233 u.action.u.ext_chan_switch.variable);
3234
3235 if (ies_len < 0)
3236 break;
3237
3238 ieee802_11_parse_elems(
3239 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3240 ies_len, true, &elems);
1b3a2e49
JB		 3241
3242 if (elems.parse_error)
3243 break;
3244
3245 /* for the handling code pretend this was also an IE */
3246 elems.ext_chansw_ie =
3247 &mgmt->u.action.u.ext_chan_switch.data;
3248
66e67e41 3249 ieee80211_sta_process_chanswitch(sdata,
37799e52 3250 rx_status->mactime,
04a161f4 3251 &elems, false);
77fdaa12 3252 }
37799e52 3253 break;
77fdaa12 3254 }
77fdaa12
JB		 3255 mutex_unlock(&ifmgd->mtx);
3256
66e67e41
JB		 3257 switch (rma) {
3258 case RX_MGMT_NONE:
3259 /* no action */
3260 break;
3261 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3262 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3263 break;
3264 case RX_MGMT_CFG80211_DISASSOC:
3265 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3266 break;
3267 case RX_MGMT_CFG80211_RX_AUTH:
3268 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3269 break;
3270 case RX_MGMT_CFG80211_RX_ASSOC:
3271 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3272 break;
3273 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3274 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3275 break;
30eb1dc2
JB		 3276 case RX_MGMT_CFG80211_TX_DEAUTH:
3277 cfg80211_send_deauth(sdata->dev, deauth_buf,
3278 sizeof(deauth_buf));
3279 break;
66e67e41
JB		 3280 default:
3281 WARN(1, "unexpected: %d", rma);
b054b747 3282 }
f0706e82
JB		 3283}
3284
9c6bd790 3285static void ieee80211_sta_timer(unsigned long data)
f0706e82 3286{
60f8b39c
JB		 3287 struct ieee80211_sub_if_data *sdata =
3288 (struct ieee80211_sub_if_data *) data;
5bb644a0 3289
9b7d72c1 3290 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3291}
3292
04ac3c0e 3293static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3294 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3295{
04ac3c0e 3296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3297 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3298
37ad3888 3299 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3300 tx, frame_buf);
04ac3c0e 3301 mutex_unlock(&ifmgd->mtx);
37ad3888 3302
04ac3c0e
FF		 3303 /*
3304 * must be outside lock due to cfg80211,
3305 * but that's not a problem.
3306 */
6ae16775 3307 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3308
04ac3c0e
FF		 3309 mutex_lock(&ifmgd->mtx);
3310}
3311
66e67e41
JB		 3312static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3313{
3314 struct ieee80211_local *local = sdata->local;
3315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3316 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3317 u32 tx_flags = 0;
66e67e41
JB		 3318
3319 lockdep_assert_held(&ifmgd->mtx);
3320
3321 if (WARN_ON_ONCE(!auth_data))
3322 return -EINVAL;
3323
1672c0e3
JB		 3324 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3325 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3326 IEEE80211_TX_INTFL_MLME_CONN_TX;
3327
66e67e41
JB		 3328 auth_data->tries++;
3329
3330 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3331 sdata_info(sdata, "authentication with %pM timed out\n",
3332 auth_data->bss->bssid);
66e67e41
JB		 3333
3334 /*
3335 * Most likely AP is not in the range so remove the
3336 * bss struct for that AP.
3337 */
3338 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3339
3340 return -ETIMEDOUT;
3341 }
3342
a1845fc7
JB		 3343 drv_mgd_prepare_tx(local, sdata);
3344
66e67e41 3345 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3346 u16 trans = 1;
3347 u16 status = 0;
3348
bdcbd8e0
JB		 3349 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3350 auth_data->bss->bssid, auth_data->tries,
3351 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3352
3353 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3354
3355 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3356 trans = auth_data->sae_trans;
3357 status = auth_data->sae_status;
3358 auth_data->expected_transaction = trans;
3359 }
3360
3361 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3362 auth_data->data, auth_data->data_len,
66e67e41 3363 auth_data->bss->bssid,
1672c0e3
JB		 3364 auth_data->bss->bssid, NULL, 0, 0,
3365 tx_flags);
66e67e41
JB		 3366 } else {
3367 const u8 *ssidie;
3368
bdcbd8e0
JB		 3369 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3370 auth_data->bss->bssid, auth_data->tries,
3371 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3372
9caf0364 3373 rcu_read_lock();
66e67e41 3374 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3375 if (!ssidie) {
3376 rcu_read_unlock();
66e67e41 3377 return -EINVAL;
9caf0364 3378 }
66e67e41
JB		 3379 /*
3380 * Direct probe is sent to broadcast address as some APs
3381 * will not answer to direct packet in unassociated state.
3382 */
3383 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3384 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3385 auth_data->bss->channel, false);
9caf0364 3386 rcu_read_unlock();
66e67e41
JB		 3387 }
3388
1672c0e3
JB		 3389 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3390 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3391 ifmgd->auth_data->timeout_started = true;
1672c0e3 3392 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3393 } else {
3394 auth_data->timeout_started = false;
1672c0e3 3395 }
66e67e41
JB		 3396
3397 return 0;
3398}
3399
3400static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3401{
3402 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3403 struct ieee80211_local *local = sdata->local;
3404
3405 lockdep_assert_held(&sdata->u.mgd.mtx);
3406
66e67e41
JB		 3407 assoc_data->tries++;
3408 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3409 sdata_info(sdata, "association with %pM timed out\n",
3410 assoc_data->bss->bssid);
66e67e41
JB		 3411
3412 /*
3413 * Most likely AP is not in the range so remove the
3414 * bss struct for that AP.
3415 */
3416 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3417
3418 return -ETIMEDOUT;
3419 }
3420
bdcbd8e0
JB		 3421 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3422 assoc_data->bss->bssid, assoc_data->tries,
3423 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3424 ieee80211_send_assoc(sdata);
3425
1672c0e3
JB		 3426 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3427 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3428 assoc_data->timeout_started = true;
1672c0e3 3429 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3430 } else {
3431 assoc_data->timeout_started = false;
1672c0e3 3432 }
66e67e41
JB		 3433
3434 return 0;
3435}
3436
1672c0e3
JB		 3437void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3438 __le16 fc, bool acked)
3439{
3440 struct ieee80211_local *local = sdata->local;
3441
3442 sdata->u.mgd.status_fc = fc;
3443 sdata->u.mgd.status_acked = acked;
3444 sdata->u.mgd.status_received = true;
3445
3446 ieee80211_queue_work(&local->hw, &sdata->work);
3447}
3448
1fa57d01 3449void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3450{
9c6bd790 3451 struct ieee80211_local *local = sdata->local;
1fa57d01 3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3453
77fdaa12
JB		 3454 mutex_lock(&ifmgd->mtx);
3455
1672c0e3
JB		 3456 if (ifmgd->status_received) {
3457 __le16 fc = ifmgd->status_fc;
3458 bool status_acked = ifmgd->status_acked;
3459
3460 ifmgd->status_received = false;
3461 if (ifmgd->auth_data &&
3462 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3463 if (status_acked) {
3464 ifmgd->auth_data->timeout =
3465 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3466 run_again(ifmgd, ifmgd->auth_data->timeout);
3467 } else {
3468 ifmgd->auth_data->timeout = jiffies - 1;
3469 }
89afe614 3470 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3471 } else if (ifmgd->assoc_data &&
3472 (ieee80211_is_assoc_req(fc) ||
3473 ieee80211_is_reassoc_req(fc))) {
3474 if (status_acked) {
3475 ifmgd->assoc_data->timeout =
3476 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3477 run_again(ifmgd, ifmgd->assoc_data->timeout);
3478 } else {
3479 ifmgd->assoc_data->timeout = jiffies - 1;
3480 }
89afe614 3481 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3482 }
3483 }
3484
89afe614 3485 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3486 time_after(jiffies, ifmgd->auth_data->timeout)) {
3487 if (ifmgd->auth_data->done) {
3488 /*
3489 * ok ... we waited for assoc but userspace didn't,
3490 * so let's just kill the auth data
3491 */
3492 ieee80211_destroy_auth_data(sdata, false);
3493 } else if (ieee80211_probe_auth(sdata)) {
3494 u8 bssid[ETH_ALEN];
3495
3496 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3497
3498 ieee80211_destroy_auth_data(sdata, false);
3499
3500 mutex_unlock(&ifmgd->mtx);
3501 cfg80211_send_auth_timeout(sdata->dev, bssid);
3502 mutex_lock(&ifmgd->mtx);
3503 }
89afe614 3504 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3505 run_again(ifmgd, ifmgd->auth_data->timeout);
3506
89afe614 3507 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3508 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3509 if ((ifmgd->assoc_data->need_beacon &&
3510 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3511 ieee80211_do_assoc(sdata)) {
3512 u8 bssid[ETH_ALEN];
3513
3514 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3515
3516 ieee80211_destroy_assoc_data(sdata, false);
3517
3518 mutex_unlock(&ifmgd->mtx);
3519 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3520 mutex_lock(&ifmgd->mtx);
3521 }
89afe614 3522 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3523 run_again(ifmgd, ifmgd->assoc_data->timeout);
3524
b291ba11
JB		 3525 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3526 IEEE80211_STA_CONNECTION_POLL) &&
3527 ifmgd->associated) {
a43abf29 3528 u8 bssid[ETH_ALEN];
72a8a3ed 3529 int max_tries;
a43abf29 3530
0c1ad2ca 3531 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3532
72a8a3ed 3533 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3534 max_tries = max_nullfunc_tries;
72a8a3ed 3535 else
180205bd 3536 max_tries = max_probe_tries;
72a8a3ed 3537
4e5ff376
FF		 3538 /* ACK received for nullfunc probing frame */
3539 if (!ifmgd->probe_send_count)
3540 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3541 else if (ifmgd->nullfunc_failed) {
3542 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3543 mlme_dbg(sdata,
3544 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3545 bssid, ifmgd->probe_send_count,
3546 max_tries);
04ac3c0e
FF		 3547 ieee80211_mgd_probe_ap_send(sdata);
3548 } else {
bdcbd8e0
JB		 3549 mlme_dbg(sdata,
3550 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3551 bssid);
95acac61 3552 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3553 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3554 false);
04ac3c0e
FF		 3555 }
3556 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3557 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3558 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3559 mlme_dbg(sdata,
3560 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3561 bssid, probe_wait_ms);
95acac61 3562 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3563 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3564 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3565 mlme_dbg(sdata,
3566 "No probe response from AP %pM after %dms, try %d/%i\n",
3567 bssid, probe_wait_ms,
3568 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3569 ieee80211_mgd_probe_ap_send(sdata);
3570 } else {
b291ba11
JB		 3571 /*
3572 * We actually lost the connection ... or did we?
3573 * Let's make sure!
3574 */
b38afa87
BG		 3575 wiphy_debug(local->hw.wiphy,
3576 "%s: No probe response from AP %pM"
3577 " after %dms, disconnecting.\n",
3578 sdata->name,
180205bd 3579 bssid, probe_wait_ms);
04ac3c0e 3580
95acac61 3581 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3582 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3583 }
3584 }
3585
77fdaa12 3586 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3587}
3588
b291ba11
JB		 3589static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3590{
3591 struct ieee80211_sub_if_data *sdata =
3592 (struct ieee80211_sub_if_data *) data;
3593 struct ieee80211_local *local = sdata->local;
3594
3595 if (local->quiescing)
3596 return;
3597
682bd38b 3598 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3599 ieee80211_queue_work(&sdata->local->hw,
3600 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3601}
3602
3603static void ieee80211_sta_conn_mon_timer(unsigned long data)
3604{
3605 struct ieee80211_sub_if_data *sdata =
3606 (struct ieee80211_sub_if_data *) data;
3607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3608 struct ieee80211_local *local = sdata->local;
3609
3610 if (local->quiescing)
3611 return;
3612
42935eca 3613 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3614}
3615
3616static void ieee80211_sta_monitor_work(struct work_struct *work)
3617{
3618 struct ieee80211_sub_if_data *sdata =
3619 container_of(work, struct ieee80211_sub_if_data,
3620 u.mgd.monitor_work);
3621
3622 ieee80211_mgd_probe_ap(sdata, false);
3623}
3624
9c6bd790
JB		 3625static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3626{
494f1fe5
EP		 3627 u32 flags;
3628
ad935687 3629 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3630 __ieee80211_stop_poll(sdata);
ad935687 3631
b291ba11 3632 /* let's probe the connection once */
494f1fe5
EP		 3633 flags = sdata->local->hw.flags;
3634 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3635 ieee80211_queue_work(&sdata->local->hw,
3636 &sdata->u.mgd.monitor_work);
b291ba11 3637 /* and do all the other regular work too */
64592c8f 3638 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3639 }
9c6bd790 3640}
f0706e82 3641
9c6bd790
JB		 3642/* interface setup */
3643void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3644{
46900298 3645 struct ieee80211_if_managed *ifmgd;
988c0f72 3646
46900298 3647 ifmgd = &sdata->u.mgd;
b291ba11 3648 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3649 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3650 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3651 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3652 INIT_WORK(&ifmgd->csa_connection_drop_work,
3653 ieee80211_csa_connection_drop_work);
d1f5b7a3 3654 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3655 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3656 (unsigned long) sdata);
b291ba11
JB		 3657 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3658 (unsigned long) sdata);
3659 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3660 (unsigned long) sdata);
46900298 3661 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3662 (unsigned long) sdata);
9c6bd790 3663
ab1faead 3664 ifmgd->flags = 0;
1478acb3 3665 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3666 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3667 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3668 ifmgd->p2p_noa_index = -1;
bbbdff9e 3669
77fdaa12 3670 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3671
3672 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3673 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3674 else
3675 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3676}
3677
77fdaa12
JB		 3678/* scan finished notification */
3679void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3680{
31ee67a1 3681 struct ieee80211_sub_if_data *sdata;
60f8b39c 3682
77fdaa12
JB		 3683 /* Restart STA timers */
3684 rcu_read_lock();
370bd005
BG		 3685 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3686 if (ieee80211_sdata_running(sdata))
3687 ieee80211_restart_sta_timer(sdata);
3688 }
77fdaa12
JB		 3689 rcu_read_unlock();
3690}
60f8b39c 3691
77fdaa12
JB		 3692int ieee80211_max_network_latency(struct notifier_block *nb,
3693 unsigned long data, void *dummy)
3694{
3695 s32 latency_usec = (s32) data;
3696 struct ieee80211_local *local =
3697 container_of(nb, struct ieee80211_local,
3698 network_latency_notifier);
1fa6f4af 3699
77fdaa12
JB		 3700 mutex_lock(&local->iflist_mtx);
3701 ieee80211_recalc_ps(local, latency_usec);
3702 mutex_unlock(&local->iflist_mtx);
dfe67012 3703
77fdaa12 3704 return 0;
9c6bd790
JB		 3705}
3706
f2d9d270
JB		 3707static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3708 struct cfg80211_bss *cbss)
3709{
3710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3711 const u8 *ht_cap_ie, *vht_cap_ie;
3712 const struct ieee80211_ht_cap *ht_cap;
3713 const struct ieee80211_vht_cap *vht_cap;
3714 u8 chains = 1;
3715
3716 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3717 return chains;
3718
9caf0364 3719 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3720 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3721 ht_cap = (void *)(ht_cap_ie + 2);
3722 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3723 /*
3724 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3725 * "Tx Unequal Modulation Supported" fields.
3726 */
3727 }
3728
3729 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3730 return chains;
3731
9caf0364 3732 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3733 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3734 u8 nss;
3735 u16 tx_mcs_map;
3736
3737 vht_cap = (void *)(vht_cap_ie + 2);
3738 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3739 for (nss = 8; nss > 0; nss--) {
3740 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3741 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3742 break;
3743 }
3744 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3745 chains = max(chains, nss);
3746 }
3747
3748 return chains;
3749}
3750
b17166a7
JB		 3751static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3752 struct cfg80211_bss *cbss)
a1cf775d
JB		 3753{
3754 struct ieee80211_local *local = sdata->local;
3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3756 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3757 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3758 struct ieee80211_supported_band *sband;
4bf88530 3759 struct cfg80211_chan_def chandef;
f2d9d270 3760 int ret;
a1cf775d 3761
24398e39
JB		 3762 sband = local->hw.wiphy->bands[cbss->channel->band];
3763
f2d9d270
JB		 3764 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3765 IEEE80211_STA_DISABLE_80P80MHZ |
3766 IEEE80211_STA_DISABLE_160MHZ);
3767
9caf0364
JB		 3768 rcu_read_lock();
3769
f2d9d270
JB		 3770 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3771 sband->ht_cap.ht_supported) {
08e6effa 3772 const u8 *ht_oper_ie, *ht_cap;
24398e39 3773
9caf0364 3774 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3775 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3776 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3777
3778 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3779 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3780 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3781 ht_oper = NULL;
3782 }
24398e39
JB		 3783 }
3784
f2d9d270
JB		 3785 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3786 sband->vht_cap.vht_supported) {
08e6effa 3787 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3788
9caf0364
JB		 3789 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3790 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3791 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3792 vht_oper = (void *)(vht_oper_ie + 2);
3793 if (vht_oper && !ht_oper) {
3794 vht_oper = NULL;
bdcbd8e0 3795 sdata_info(sdata,
f2d9d270 3796 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3797 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3798 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3799 }
08e6effa
JB		 3800
3801 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3802 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3803 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3804 vht_oper = NULL;
3805 }
24398e39
JB		 3806 }
3807
f2d9d270
JB		 3808 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3809 cbss->channel,
3810 ht_oper, vht_oper,
30eb1dc2 3811 &chandef, true);
04ecd257 3812
f2d9d270
JB		 3813 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3814 local->rx_chains);
24398e39 3815
9caf0364
JB		 3816 rcu_read_unlock();
3817
04ecd257
JB		 3818 /* will change later if needed */
3819 sdata->smps_mode = IEEE80211_SMPS_OFF;
3820
f2d9d270
JB		 3821 /*
3822 * If this fails (possibly due to channel context sharing
3823 * on incompatible channels, e.g. 80+80 and 160 sharing the
3824 * same control channel) try to use a smaller bandwidth.
3825 */
3826 ret = ieee80211_vif_use_channel(sdata, &chandef,
3827 IEEE80211_CHANCTX_SHARED);
d601cd8d 3828 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3829 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3830 ret = ieee80211_vif_use_channel(sdata, &chandef,
3831 IEEE80211_CHANCTX_SHARED);
3832 }
f2d9d270 3833 return ret;
b17166a7
JB		 3834}
3835
3836static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3837 struct cfg80211_bss *cbss, bool assoc)
3838{
3839 struct ieee80211_local *local = sdata->local;
3840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3841 struct ieee80211_bss *bss = (void *)cbss->priv;
3842 struct sta_info *new_sta = NULL;
3843 bool have_sta = false;
3844 int err;
3845
3846 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3847 return -EINVAL;
3848
3849 if (assoc) {
3850 rcu_read_lock();
3851 have_sta = sta_info_get(sdata, cbss->bssid);
3852 rcu_read_unlock();
3853 }
3854
3855 if (!have_sta) {
3856 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3857 if (!new_sta)
3858 return -ENOMEM;
3859 }
3860
13e0c8e3 3861 if (new_sta) {
5d6a1b06
JB		 3862 u32 rates = 0, basic_rates = 0;
3863 bool have_higher_than_11mbit;
3864 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3865 struct ieee80211_supported_band *sband;
8cef2c9d 3866 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3867
3868 sband = local->hw.wiphy->bands[cbss->channel->band];
3869
3870 err = ieee80211_prep_channel(sdata, cbss);
3871 if (err) {
3872 sta_info_free(local, new_sta);
3873 return err;
3874 }
5d6a1b06 3875
5d6a1b06
JB		 3876 ieee80211_get_rates(sband, bss->supp_rates,
3877 bss->supp_rates_len,
3878 &rates, &basic_rates,
3879 &have_higher_than_11mbit,
3880 &min_rate, &min_rate_index);
3881
3882 /*
3883 * This used to be a workaround for basic rates missing
3884 * in the association response frame. Now that we no
3885 * longer use the basic rates from there, it probably
3886 * doesn't happen any more, but keep the workaround so
3887 * in case some *other* APs are buggy in different ways
3888 * we can connect -- with a warning.
3889 */
3890 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3891 sdata_info(sdata,
3892 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3893 basic_rates = BIT(min_rate_index);
3894 }
3895
13e0c8e3 3896 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3897 sdata->vif.bss_conf.basic_rates = basic_rates;
3898
3899 /* cf. IEEE 802.11 9.2.12 */
55de908a 3900 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3901 have_higher_than_11mbit)
3902 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3903 else
3904 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3905
3906 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3907
8c358bcd
JB		 3908 /* set timing information */
3909 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3910 rcu_read_lock();
ef429dad
JB		 3911 ies = rcu_dereference(cbss->beacon_ies);
3912 if (ies) {
3913 const u8 *tim_ie;
3914
3915 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3916 sdata->vif.bss_conf.sync_device_ts =
3917 bss->device_ts_beacon;
3918 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3919 ies->data, ies->len);
3920 if (tim_ie && tim_ie[1] >= 2)
3921 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3922 else
3923 sdata->vif.bss_conf.sync_dtim_count = 0;
3924 } else if (!(local->hw.flags &
3925 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3926 ies = rcu_dereference(cbss->proberesp_ies);
3927 /* must be non-NULL since beacon IEs were NULL */
3928 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3929 sdata->vif.bss_conf.sync_device_ts =
3930 bss->device_ts_presp;
3931 sdata->vif.bss_conf.sync_dtim_count = 0;
3932 } else {
3933 sdata->vif.bss_conf.sync_tsf = 0;
3934 sdata->vif.bss_conf.sync_device_ts = 0;
3935 sdata->vif.bss_conf.sync_dtim_count = 0;
3936 }
8cef2c9d 3937 rcu_read_unlock();
8c358bcd
JB		 3938
3939 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3940 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3941 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3942 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3943
3944 if (assoc)
13e0c8e3 3945 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3946
13e0c8e3
JB		 3947 err = sta_info_insert(new_sta);
3948 new_sta = NULL;
a1cf775d 3949 if (err) {
bdcbd8e0
JB		 3950 sdata_info(sdata,
3951 "failed to insert STA entry for the AP (error %d)\n",
3952 err);
a1cf775d
JB		 3953 return err;
3954 }
3955 } else
b203ca39 3956 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3957
3958 return 0;
3959}
3960
77fdaa12
JB		 3961/* config hooks */
3962int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3963 struct cfg80211_auth_request *req)
9c6bd790 3964{
66e67e41
JB		 3965 struct ieee80211_local *local = sdata->local;
3966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3967 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3968 u16 auth_alg;
66e67e41
JB		 3969 int err;
3970
3971 /* prepare auth data structure */
9c6bd790 3972
77fdaa12
JB		 3973 switch (req->auth_type) {
3974 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3975 auth_alg = WLAN_AUTH_OPEN;
3976 break;
3977 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3978 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3979 return -EOPNOTSUPP;
77fdaa12
JB		 3980 auth_alg = WLAN_AUTH_SHARED_KEY;
3981 break;
3982 case NL80211_AUTHTYPE_FT:
3983 auth_alg = WLAN_AUTH_FT;
3984 break;
3985 case NL80211_AUTHTYPE_NETWORK_EAP:
3986 auth_alg = WLAN_AUTH_LEAP;
3987 break;
6b8ece3a
JM		 3988 case NL80211_AUTHTYPE_SAE:
3989 auth_alg = WLAN_AUTH_SAE;
3990 break;
77fdaa12
JB		 3991 default:
3992 return -EOPNOTSUPP;
60f8b39c 3993 }
77fdaa12 3994
6b8ece3a
JM		 3995 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3996 req->ie_len, GFP_KERNEL);
66e67e41 3997 if (!auth_data)
9c6bd790 3998 return -ENOMEM;
77fdaa12 3999
66e67e41 4000 auth_data->bss = req->bss;
77fdaa12 4001
6b8ece3a
JM		 4002 if (req->sae_data_len >= 4) {
4003 __le16 *pos = (__le16 *) req->sae_data;
4004 auth_data->sae_trans = le16_to_cpu(pos[0]);
4005 auth_data->sae_status = le16_to_cpu(pos[1]);
4006 memcpy(auth_data->data, req->sae_data + 4,
4007 req->sae_data_len - 4);
4008 auth_data->data_len += req->sae_data_len - 4;
4009 }
4010
77fdaa12 4011 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4012 memcpy(&auth_data->data[auth_data->data_len],
4013 req->ie, req->ie_len);
4014 auth_data->data_len += req->ie_len;
9c6bd790 4015 }
77fdaa12 4016
fffd0934 4017 if (req->key && req->key_len) {
66e67e41
JB		 4018 auth_data->key_len = req->key_len;
4019 auth_data->key_idx = req->key_idx;
4020 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4021 }
4022
66e67e41 4023 auth_data->algorithm = auth_alg;
60f8b39c 4024
66e67e41 4025 /* try to authenticate/probe */
2a33bee2 4026
66e67e41 4027 mutex_lock(&ifmgd->mtx);
2a33bee2 4028
66e67e41
JB		 4029 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4030 ifmgd->assoc_data) {
4031 err = -EBUSY;
4032 goto err_free;
2a33bee2
GE		 4033 }
4034
66e67e41
JB		 4035 if (ifmgd->auth_data)
4036 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4037
66e67e41
JB		 4038 /* prep auth_data so we don't go into idle on disassoc */
4039 ifmgd->auth_data = auth_data;
af6b6374 4040
7b119dc0
JB		 4041 if (ifmgd->associated) {
4042 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4043
4044 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4045 WLAN_REASON_UNSPECIFIED,
4046 false, frame_buf);
4047
4048 __cfg80211_send_deauth(sdata->dev, frame_buf,
4049 sizeof(frame_buf));
4050 }
af6b6374 4051
bdcbd8e0 4052 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4053
a1cf775d
JB		 4054 err = ieee80211_prep_connection(sdata, req->bss, false);
4055 if (err)
66e67e41 4056 goto err_clear;
af6b6374 4057
66e67e41
JB		 4058 err = ieee80211_probe_auth(sdata);
4059 if (err) {
66e67e41
JB		 4060 sta_info_destroy_addr(sdata, req->bss->bssid);
4061 goto err_clear;
4062 }
4063
4064 /* hold our own reference */
5b112d3d 4065 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 4066 err = 0;
4067 goto out_unlock;
4068
4069 err_clear:
3d2abdfd
EP		 4070 memset(ifmgd->bssid, 0, ETH_ALEN);
4071 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4072 ifmgd->auth_data = NULL;
4073 err_free:
4074 kfree(auth_data);
4075 out_unlock:
4076 mutex_unlock(&ifmgd->mtx);
b2abb6e2 4077
66e67e41 4078 return err;
af6b6374
JB		 4079}
4080
77fdaa12
JB		 4081int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4082 struct cfg80211_assoc_request *req)
f0706e82 4083{
66e67e41 4084 struct ieee80211_local *local = sdata->local;
77fdaa12 4085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4086 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4087 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4088 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4089 struct ieee80211_supported_band *sband;
b08fbbd8 4090 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4091 int i, err;
f0706e82 4092
66e67e41
JB		 4093 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4094 if (!assoc_data)
4095 return -ENOMEM;
4096
9caf0364
JB		 4097 rcu_read_lock();
4098 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4099 if (!ssidie) {
4100 rcu_read_unlock();
4101 kfree(assoc_data);
4102 return -EINVAL;
4103 }
4104 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4105 assoc_data->ssid_len = ssidie[1];
4106 rcu_read_unlock();
4107
77fdaa12 4108 mutex_lock(&ifmgd->mtx);
9c87ba67 4109
7b119dc0
JB		 4110 if (ifmgd->associated) {
4111 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4112
4113 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4114 WLAN_REASON_UNSPECIFIED,
4115 false, frame_buf);
4116
4117 __cfg80211_send_deauth(sdata->dev, frame_buf,
4118 sizeof(frame_buf));
4119 }
66e67e41
JB		 4120
4121 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4122 err = -EBUSY;
4123 goto err_free;
af6b6374 4124 }
77fdaa12 4125
66e67e41
JB		 4126 if (ifmgd->assoc_data) {
4127 err = -EBUSY;
4128 goto err_free;
4129 }
77fdaa12 4130
66e67e41
JB		 4131 if (ifmgd->auth_data) {
4132 bool match;
4133
4134 /* keep sta info, bssid if matching */
b203ca39 4135 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4136 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4137 }
4138
66e67e41 4139 /* prepare assoc data */
19c3b830 4140
d8ec4433
JO		 4141 ifmgd->beacon_crc_valid = false;
4142
de5036aa
JB		 4143 /*
4144 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4145 * We still associate in non-HT mode (11a/b/g) if any one of these
4146 * ciphers is configured as pairwise.
4147 * We can set this to true for non-11n hardware, that'll be checked
4148 * separately along with the peer capabilities.
4149 */
1c4cb928 4150 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4151 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4152 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4153 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4154 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4155 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4156 netdev_info(sdata->dev,
d545daba 4157 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4158 }
4159 }
77fdaa12 4160
d545daba 4161 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4162 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4163 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4164 }
ef96a842 4165
dd5ecfea
JB		 4166 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4167 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4168
4e74bfdb
JB		 4169 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4170 sband = local->hw.wiphy->bands[req->bss->channel->band];
4171 if (!sband->ht_cap.ht_supported ||
1c4cb928 4172 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4173 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4174 if (!bss->wmm_used)
4175 netdev_info(sdata->dev,
4176 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4177 }
4e74bfdb 4178
d545daba
MP		 4179 /* disable VHT if we don't support it or the AP doesn't use WMM */
4180 if (!sband->vht_cap.vht_supported ||
4181 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4182 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4183 if (!bss->wmm_used)
4184 netdev_info(sdata->dev,
4185 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4186 }
4187
ef96a842
BG		 4188 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4189 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4190 sizeof(ifmgd->ht_capa_mask));
4191
dd5ecfea
JB		 4192 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4193 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4194 sizeof(ifmgd->vht_capa_mask));
4195
77fdaa12 4196 if (req->ie && req->ie_len) {
66e67e41
JB		 4197 memcpy(assoc_data->ie, req->ie, req->ie_len);
4198 assoc_data->ie_len = req->ie_len;
4199 }
f679f65d 4200
66e67e41 4201 assoc_data->bss = req->bss;
f679f65d 4202
af6b6374
JB		 4203 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4204 if (ifmgd->powersave)
04ecd257 4205 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4206 else
04ecd257 4207 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4208 } else
04ecd257 4209 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4210
66e67e41 4211 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4212 assoc_data->wmm = bss->wmm_used &&
4213 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4214 assoc_data->supp_rates = bss->supp_rates;
4215 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4216
9caf0364 4217 rcu_read_lock();
9dde6423
JB		 4218 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4219 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4220 assoc_data->ap_ht_param =
4221 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4222 else
a8243b72 4223 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4224 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4225 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4226 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4227 sizeof(struct ieee80211_vht_cap));
4228 else
4229 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4230 rcu_read_unlock();
63f170e0 4231
ab13315a 4232 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4233 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4234 sdata->wmm_acm != 0xff) {
76f0303d 4235 assoc_data->uapsd = true;
ab13315a
KV		 4236 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4237 } else {
76f0303d 4238 assoc_data->uapsd = false;
ab13315a
KV		 4239 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4240 }
4241
77fdaa12 4242 if (req->prev_bssid)
66e67e41 4243 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4244
4245 if (req->use_mfp) {
4246 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4247 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4248 } else {
4249 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4250 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4251 }
4252
4253 if (req->crypto.control_port)
4254 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4255 else
4256 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4257
a621fa4d
JB		 4258 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4259 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4260
66e67e41
JB		 4261 /* kick off associate process */
4262
4263 ifmgd->assoc_data = assoc_data;
826262c3 4264 ifmgd->dtim_period = 0;
66e67e41 4265
a1cf775d
JB		 4266 err = ieee80211_prep_connection(sdata, req->bss, true);
4267 if (err)
4268 goto err_clear;
66e67e41 4269
c65dd147
EG		 4270 rcu_read_lock();
4271 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4272
c65dd147
EG		 4273 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4274 !beacon_ies) {
4275 /*
4276 * Wait up to one beacon interval ...
4277 * should this be more if we miss one?
4278 */
4279 sdata_info(sdata, "waiting for beacon from %pM\n",
4280 ifmgd->bssid);
4281 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4282 assoc_data->timeout_started = true;
c65dd147
EG		 4283 assoc_data->need_beacon = true;
4284 } else if (beacon_ies) {
4285 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4286 beacon_ies->data,
4287 beacon_ies->len);
ef429dad
JB		 4288 u8 dtim_count = 0;
4289
c65dd147
EG		 4290 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4291 const struct ieee80211_tim_ie *tim;
4292 tim = (void *)(tim_ie + 2);
4293 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4294 dtim_count = tim->dtim_count;
826262c3 4295 }
66e67e41 4296 assoc_data->have_beacon = true;
66e67e41 4297 assoc_data->timeout = jiffies;
89afe614 4298 assoc_data->timeout_started = true;
ef429dad
JB		 4299
4300 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4301 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4302 sdata->vif.bss_conf.sync_device_ts =
4303 bss->device_ts_beacon;
4304 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4305 }
c65dd147
EG		 4306 } else {
4307 assoc_data->timeout = jiffies;
89afe614 4308 assoc_data->timeout_started = true;
66e67e41 4309 }
c65dd147
EG		 4310 rcu_read_unlock();
4311
66e67e41
JB		 4312 run_again(ifmgd, assoc_data->timeout);
4313
fcff4f10
PS		 4314 if (bss->corrupt_data) {
4315 char *corrupt_type = "data";
4316 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4317 if (bss->corrupt_data &
4318 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4319 corrupt_type = "beacon and probe response";
4320 else
4321 corrupt_type = "beacon";
4322 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4323 corrupt_type = "probe response";
bdcbd8e0
JB		 4324 sdata_info(sdata, "associating with AP with corrupt %s\n",
4325 corrupt_type);
fcff4f10
PS		 4326 }
4327
66e67e41
JB		 4328 err = 0;
4329 goto out;
4330 err_clear:
3d2abdfd
EP		 4331 memset(ifmgd->bssid, 0, ETH_ALEN);
4332 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4333 ifmgd->assoc_data = NULL;
4334 err_free:
4335 kfree(assoc_data);
4336 out:
4337 mutex_unlock(&ifmgd->mtx);
4338
4339 return err;
f0706e82
JB		 4340}
4341
77fdaa12 4342int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4343 struct cfg80211_deauth_request *req)
f0706e82 4344{
46900298 4345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4346 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4347 bool tx = !req->local_state_change;
86552017 4348 bool sent_frame = false;
f0706e82 4349
77fdaa12
JB		 4350 mutex_lock(&ifmgd->mtx);
4351
bdcbd8e0
JB		 4352 sdata_info(sdata,
4353 "deauthenticating from %pM by local choice (reason=%d)\n",
4354 req->bssid, req->reason_code);
0ff71613 4355
86552017 4356 if (ifmgd->auth_data) {
8c7d857c 4357 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4358 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4359 IEEE80211_STYPE_DEAUTH,
6863255b 4360 req->reason_code, tx,
37ad3888 4361 frame_buf);
86552017
JB		 4362 ieee80211_destroy_auth_data(sdata, false);
4363 mutex_unlock(&ifmgd->mtx);
4364
4365 sent_frame = tx;
4366 goto out;
8c7d857c
EG		 4367 }
4368
86552017
JB		 4369 if (ifmgd->associated &&
4370 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4371 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4372 req->reason_code, tx, frame_buf);
4373 sent_frame = tx;
4374 }
37ad3888
JB		 4375 mutex_unlock(&ifmgd->mtx);
4376
86552017 4377 out:
86552017
JB		 4378 if (sent_frame)
4379 __cfg80211_send_deauth(sdata->dev, frame_buf,
4380 IEEE80211_DEAUTH_FRAME_LEN);
4381
f0706e82
JB		 4382 return 0;
4383}
84363e6e 4384
77fdaa12 4385int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4386 struct cfg80211_disassoc_request *req)
9c6bd790 4387{
77fdaa12 4388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4389 u8 bssid[ETH_ALEN];
6ae16775 4390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4391
77fdaa12 4392 mutex_lock(&ifmgd->mtx);
10f644a4 4393
8d8b261a
JB		 4394 /*
4395 * cfg80211 should catch this ... but it's racy since
4396 * we can receive a disassoc frame, process it, hand it
4397 * to cfg80211 while that's in a locked section already
4398 * trying to tell us that the user wants to disconnect.
4399 */
0c1ad2ca 4400 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4401 mutex_unlock(&ifmgd->mtx);
4402 return -ENOLINK;
4403 }
4404
bdcbd8e0
JB		 4405 sdata_info(sdata,
4406 "disassociating from %pM by local choice (reason=%d)\n",
4407 req->bss->bssid, req->reason_code);
0ff71613 4408
e69e95db 4409 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4410 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4411 req->reason_code, !req->local_state_change,
4412 frame_buf);
77fdaa12 4413 mutex_unlock(&ifmgd->mtx);
10f644a4 4414
6ae16775
AQ		 4415 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4416 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4417
10f644a4
JB		 4418 return 0;
4419}
026331c4 4420
afa762f6 4421void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4422{
4423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4424
49921859
BG		 4425 /*
4426 * Make sure some work items will not run after this,
4427 * they will not do anything but might not have been
4428 * cancelled when disconnecting.
4429 */
4430 cancel_work_sync(&ifmgd->monitor_work);
4431 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4432 cancel_work_sync(&ifmgd->request_smps_work);
4433 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4434 cancel_work_sync(&ifmgd->chswitch_work);
4435
54e4ffb2
JB		 4436 mutex_lock(&ifmgd->mtx);
4437 if (ifmgd->assoc_data)
4438 ieee80211_destroy_assoc_data(sdata, false);
4439 if (ifmgd->auth_data)
4440 ieee80211_destroy_auth_data(sdata, false);
4441 del_timer_sync(&ifmgd->timer);
4442 mutex_unlock(&ifmgd->mtx);
4443}
4444
a97c13c3
JO		 4445void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4446 enum nl80211_cqm_rssi_threshold_event rssi_event,
4447 gfp_t gfp)
4448{
4449 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4450
b5878a2d
JB		 4451 trace_api_cqm_rssi_notify(sdata, rssi_event);
4452
a97c13c3
JO		 4453 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4454}
4455EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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