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mac80211: cleanup generic suspend/resume procedures
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
5bb644a0
JB		 90#define TMR_RUNNING_TIMER 0
91#define TMR_RUNNING_CHANSW 1
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
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;
292 goto out;
293 }
294
295 if (!vht_oper || !sband->vht_cap.vht_supported) {
296 ret = IEEE80211_STA_DISABLE_VHT;
297 goto out;
298 }
299
300 vht_chandef.chan = channel;
301 vht_chandef.center_freq1 =
302 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
303 channel->band);
304 vht_chandef.center_freq2 = 0;
305
306 if (vht_oper->center_freq_seg2_idx)
307 vht_chandef.center_freq2 =
308 ieee80211_channel_to_frequency(
309 vht_oper->center_freq_seg2_idx,
310 channel->band);
311
312 switch (vht_oper->chan_width) {
313 case IEEE80211_VHT_CHANWIDTH_USE_HT:
314 vht_chandef.width = chandef->width;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_80MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_80;
318 break;
319 case IEEE80211_VHT_CHANWIDTH_160MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_160;
321 break;
322 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
323 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
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;
b08fbbd8 607 int i;
d545daba
MP		 608
609 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
610
611 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 612 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 613
614 /* determine capability flags */
615 cap = vht_cap.cap;
616
f2d9d270
JB		 617 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
618 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
619 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
620 }
621
622 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
623 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
624 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
625 }
626
b08fbbd8
JB		 627 /*
628 * Some APs apparently get confused if our capabilities are better
629 * than theirs, so restrict what we advertise in the assoc request.
630 */
631 if (!(ap_vht_cap->vht_cap_info &
632 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
633 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
634
635 if (!(ap_vht_cap->vht_cap_info &
636 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
637 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
638 IEEE80211_VHT_CAP_RXSTBC_3 |
639 IEEE80211_VHT_CAP_RXSTBC_4);
640
641 for (i = 0; i < 8; i++) {
642 int shift = i * 2;
643 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
644 u16 ap_mcs, our_mcs;
645
646 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
647 mask) >> shift;
648 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
649 mask) >> shift;
650
24af717c
JB		 651 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
652 continue;
653
b08fbbd8
JB		 654 switch (ap_mcs) {
655 default:
656 if (our_mcs <= ap_mcs)
657 break;
658 /* fall through */
659 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
660 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
661 vht_cap.vht_mcs.rx_mcs_map |=
662 cpu_to_le16(ap_mcs << shift);
663 }
664 }
665
d545daba 666 /* reserve and fill IE */
d4950281 667 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 668 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
669}
670
66e67e41
JB		 671static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
672{
673 struct ieee80211_local *local = sdata->local;
674 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
675 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
676 struct sk_buff *skb;
677 struct ieee80211_mgmt *mgmt;
678 u8 *pos, qos_info;
679 size_t offset = 0, noffset;
680 int i, count, rates_len, supp_rates_len;
681 u16 capab;
682 struct ieee80211_supported_band *sband;
55de908a
JB		 683 struct ieee80211_chanctx_conf *chanctx_conf;
684 struct ieee80211_channel *chan;
66e67e41 685 u32 rates = 0;
66e67e41
JB		 686
687 lockdep_assert_held(&ifmgd->mtx);
688
55de908a
JB		 689 rcu_read_lock();
690 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
691 if (WARN_ON(!chanctx_conf)) {
692 rcu_read_unlock();
693 return;
694 }
4bf88530 695 chan = chanctx_conf->def.chan;
55de908a
JB		 696 rcu_read_unlock();
697 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 698
699 if (assoc_data->supp_rates_len) {
700 /*
701 * Get all rates supported by the device and the AP as
702 * some APs don't like getting a superset of their rates
703 * in the association request (e.g. D-Link DAP 1353 in
704 * b-only mode)...
705 */
706 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
707 assoc_data->supp_rates_len,
708 sband, &rates);
709 } else {
710 /*
711 * In case AP not provide any supported rates information
712 * before association, we send information element(s) with
713 * all rates that we support.
714 */
715 rates = ~0;
716 rates_len = sband->n_bitrates;
717 }
718
719 skb = alloc_skb(local->hw.extra_tx_headroom +
720 sizeof(*mgmt) + /* bit too much but doesn't matter */
721 2 + assoc_data->ssid_len + /* SSID */
722 4 + rates_len + /* (extended) rates */
723 4 + /* power capability */
724 2 + 2 * sband->n_channels + /* supported channels */
725 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 726 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 727 assoc_data->ie_len + /* extra IEs */
728 9, /* WMM */
729 GFP_KERNEL);
730 if (!skb)
731 return;
732
733 skb_reserve(skb, local->hw.extra_tx_headroom);
734
735 capab = WLAN_CAPABILITY_ESS;
736
737 if (sband->band == IEEE80211_BAND_2GHZ) {
738 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
739 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
742 }
743
744 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
745 capab |= WLAN_CAPABILITY_PRIVACY;
746
747 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
748 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
749 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
750
751 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
752 memset(mgmt, 0, 24);
753 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
754 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
755 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
756
757 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
758 skb_put(skb, 10);
759 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
760 IEEE80211_STYPE_REASSOC_REQ);
761 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
762 mgmt->u.reassoc_req.listen_interval =
763 cpu_to_le16(local->hw.conf.listen_interval);
764 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
765 ETH_ALEN);
766 } else {
767 skb_put(skb, 4);
768 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
769 IEEE80211_STYPE_ASSOC_REQ);
770 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
771 mgmt->u.assoc_req.listen_interval =
772 cpu_to_le16(local->hw.conf.listen_interval);
773 }
774
775 /* SSID */
776 pos = skb_put(skb, 2 + assoc_data->ssid_len);
777 *pos++ = WLAN_EID_SSID;
778 *pos++ = assoc_data->ssid_len;
779 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
780
781 /* add all rates which were marked to be used above */
782 supp_rates_len = rates_len;
783 if (supp_rates_len > 8)
784 supp_rates_len = 8;
785
786 pos = skb_put(skb, supp_rates_len + 2);
787 *pos++ = WLAN_EID_SUPP_RATES;
788 *pos++ = supp_rates_len;
789
790 count = 0;
791 for (i = 0; i < sband->n_bitrates; i++) {
792 if (BIT(i) & rates) {
793 int rate = sband->bitrates[i].bitrate;
794 *pos++ = (u8) (rate / 5);
795 if (++count == 8)
796 break;
797 }
798 }
799
800 if (rates_len > count) {
801 pos = skb_put(skb, rates_len - count + 2);
802 *pos++ = WLAN_EID_EXT_SUPP_RATES;
803 *pos++ = rates_len - count;
804
805 for (i++; i < sband->n_bitrates; i++) {
806 if (BIT(i) & rates) {
807 int rate = sband->bitrates[i].bitrate;
808 *pos++ = (u8) (rate / 5);
809 }
810 }
811 }
812
813 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
814 /* 1. power capabilities */
815 pos = skb_put(skb, 4);
816 *pos++ = WLAN_EID_PWR_CAPABILITY;
817 *pos++ = 2;
818 *pos++ = 0; /* min tx power */
55de908a 819 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 820
821 /* 2. supported channels */
822 /* TODO: get this in reg domain format */
823 pos = skb_put(skb, 2 * sband->n_channels + 2);
824 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
825 *pos++ = 2 * sband->n_channels;
826 for (i = 0; i < sband->n_channels; i++) {
827 *pos++ = ieee80211_frequency_to_channel(
828 sband->channels[i].center_freq);
829 *pos++ = 1; /* one channel in the subband*/
830 }
831 }
832
833 /* if present, add any custom IEs that go before HT */
834 if (assoc_data->ie_len && assoc_data->ie) {
835 static const u8 before_ht[] = {
836 WLAN_EID_SSID,
837 WLAN_EID_SUPP_RATES,
838 WLAN_EID_EXT_SUPP_RATES,
839 WLAN_EID_PWR_CAPABILITY,
840 WLAN_EID_SUPPORTED_CHANNELS,
841 WLAN_EID_RSN,
842 WLAN_EID_QOS_CAPA,
843 WLAN_EID_RRM_ENABLED_CAPABILITIES,
844 WLAN_EID_MOBILITY_DOMAIN,
845 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
846 };
847 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
848 before_ht, ARRAY_SIZE(before_ht),
849 offset);
850 pos = skb_put(skb, noffset - offset);
851 memcpy(pos, assoc_data->ie + offset, noffset - offset);
852 offset = noffset;
853 }
854
f2d9d270
JB		 855 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
856 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
858
a8243b72 859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 860 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 861 sband, chan, sdata->smps_mode);
66e67e41 862
d545daba 863 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 864 ieee80211_add_vht_ie(sdata, skb, sband,
865 &assoc_data->ap_vht_cap);
d545daba 866
66e67e41
JB		 867 /* if present, add any custom non-vendor IEs that go after HT */
868 if (assoc_data->ie_len && assoc_data->ie) {
869 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
870 assoc_data->ie_len,
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
76f0303d
JB		 877 if (assoc_data->wmm) {
878 if (assoc_data->uapsd) {
dc41e4d4
EP		 879 qos_info = ifmgd->uapsd_queues;
880 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 881 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
882 } else {
883 qos_info = 0;
884 }
885
886 pos = skb_put(skb, 9);
887 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
888 *pos++ = 7; /* len */
889 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
890 *pos++ = 0x50;
891 *pos++ = 0xf2;
892 *pos++ = 2; /* WME */
893 *pos++ = 0; /* WME info */
894 *pos++ = 1; /* WME ver */
895 *pos++ = qos_info;
896 }
897
898 /* add any remaining custom (i.e. vendor specific here) IEs */
899 if (assoc_data->ie_len && assoc_data->ie) {
900 noffset = assoc_data->ie_len;
901 pos = skb_put(skb, noffset - offset);
902 memcpy(pos, assoc_data->ie + offset, noffset - offset);
903 }
904
a1845fc7
JB		 905 drv_mgd_prepare_tx(local, sdata);
906
66e67e41 907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 908 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
910 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 911 ieee80211_tx_skb(sdata, skb);
912}
913
572e0012
KV		 914void ieee80211_send_pspoll(struct ieee80211_local *local,
915 struct ieee80211_sub_if_data *sdata)
916{
572e0012
KV		 917 struct ieee80211_pspoll *pspoll;
918 struct sk_buff *skb;
572e0012 919
d8cd189e
KV		 920 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
921 if (!skb)
572e0012 922 return;
572e0012 923
d8cd189e
KV		 924 pspoll = (struct ieee80211_pspoll *) skb->data;
925 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 926
62ae67be
JB		 927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
928 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 929}
930
965bedad
JB		 931void ieee80211_send_nullfunc(struct ieee80211_local *local,
932 struct ieee80211_sub_if_data *sdata,
933 int powersave)
934{
935 struct sk_buff *skb;
d8cd189e 936 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 938
d8cd189e
KV		 939 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
940 if (!skb)
965bedad 941 return;
965bedad 942
d8cd189e 943 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 944 if (powersave)
d8cd189e 945 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 946
6c17b77b
SF		 947 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
948 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 949 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
950 IEEE80211_STA_CONNECTION_POLL))
951 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
952
62ae67be 953 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 954}
955
d524215f
FF		 956static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
957 struct ieee80211_sub_if_data *sdata)
958{
959 struct sk_buff *skb;
960 struct ieee80211_hdr *nullfunc;
961 __le16 fc;
962
963 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
964 return;
965
966 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 967 if (!skb)
d524215f 968 return;
d15b8459 969
d524215f
FF		 970 skb_reserve(skb, local->hw.extra_tx_headroom);
971
972 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
973 memset(nullfunc, 0, 30);
974 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
975 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
976 nullfunc->frame_control = fc;
977 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
978 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
979 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
980 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
981
982 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
983 ieee80211_tx_skb(sdata, skb);
984}
985
cc32abd4
JB		 986/* spectrum management related things */
987static void ieee80211_chswitch_work(struct work_struct *work)
988{
989 struct ieee80211_sub_if_data *sdata =
990 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
992
9607e6b6 993 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 994 return;
995
77fdaa12
JB		 996 mutex_lock(&ifmgd->mtx);
997 if (!ifmgd->associated)
998 goto out;
cc32abd4 999
55de908a 1000 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 1001 if (!sdata->local->ops->channel_switch) {
1002 /* call "hw_config" only if doing sw channel switch */
1003 ieee80211_hw_config(sdata->local,
1004 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1005 } else {
1006 /* update the device channel directly */
55de908a 1007 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1008 }
77fdaa12 1009
cc32abd4 1010 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1011 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1012
57eebdf3 1013 /* XXX: wait for a beacon first? */
cc32abd4
JB		 1014 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1015 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1016 out:
1017 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1018 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1019}
1020
5ce6e438
JB		 1021void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1022{
55de908a
JB		 1023 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1025
1026 trace_api_chswitch_done(sdata, success);
1027 if (!success) {
882a7c69
JB		 1028 sdata_info(sdata,
1029 "driver channel switch failed, disconnecting\n");
1030 ieee80211_queue_work(&sdata->local->hw,
1031 &ifmgd->csa_connection_drop_work);
1032 } else {
1033 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1034 }
5ce6e438
JB		 1035}
1036EXPORT_SYMBOL(ieee80211_chswitch_done);
1037
cc32abd4
JB		 1038static void ieee80211_chswitch_timer(unsigned long data)
1039{
1040 struct ieee80211_sub_if_data *sdata =
1041 (struct ieee80211_sub_if_data *) data;
1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1043
5bb644a0
JB		 1044 if (sdata->local->quiescing) {
1045 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1046 return;
1047 }
1048
42935eca 1049 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 1050}
1051
4a3cb702
JB		 1052void
1053ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1054 const struct ieee80211_channel_sw_ie *sw_elem,
1055 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1056{
0c1ad2ca
JB		 1057 struct cfg80211_bss *cbss =
1058 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1059 struct ieee80211_channel *new_ch;
1060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1061 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1062 cbss->channel->band);
55de908a 1063 struct ieee80211_chanctx *chanctx;
cc32abd4 1064
77fdaa12
JB		 1065 ASSERT_MGD_MTX(ifmgd);
1066
1067 if (!ifmgd->associated)
cc32abd4
JB		 1068 return;
1069
fbe9c429 1070 if (sdata->local->scanning)
cc32abd4
JB		 1071 return;
1072
1073 /* Disregard subsequent beacons if we are already running a timer
1074 processing a CSA */
1075
1076 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1077 return;
1078
1079 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1080 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1081 sdata_info(sdata,
1082 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1083 ifmgd->associated->bssid, new_freq);
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
cc32abd4 1086 return;
882a7c69 1087 }
cc32abd4 1088
57eebdf3
JB		 1089 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1090
55de908a
JB		 1091 if (sdata->local->use_chanctx) {
1092 sdata_info(sdata,
1093 "not handling channel switch with channel contexts\n");
1094 ieee80211_queue_work(&sdata->local->hw,
1095 &ifmgd->csa_connection_drop_work);
246dc3fd 1096 return;
55de908a
JB		 1097 }
1098
1099 mutex_lock(&sdata->local->chanctx_mtx);
1100 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1101 mutex_unlock(&sdata->local->chanctx_mtx);
1102 return;
1103 }
1104 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1105 struct ieee80211_chanctx, conf);
1106 if (chanctx->refcount > 1) {
1107 sdata_info(sdata,
1108 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1109 ieee80211_queue_work(&sdata->local->hw,
1110 &ifmgd->csa_connection_drop_work);
1111 mutex_unlock(&sdata->local->chanctx_mtx);
1112 return;
1113 }
1114 mutex_unlock(&sdata->local->chanctx_mtx);
1115
1116 sdata->local->csa_channel = new_ch;
1117
57eebdf3
JB		 1118 if (sw_elem->mode)
1119 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1120 IEEE80211_QUEUE_STOP_REASON_CSA);
1121
5ce6e438
JB		 1122 if (sdata->local->ops->channel_switch) {
1123 /* use driver's channel switch callback */
57eebdf3
JB		 1124 struct ieee80211_channel_switch ch_switch = {
1125 .timestamp = timestamp,
1126 .block_tx = sw_elem->mode,
1127 .channel = new_ch,
1128 .count = sw_elem->count,
1129 };
1130
5ce6e438
JB		 1131 drv_channel_switch(sdata->local, &ch_switch);
1132 return;
1133 }
1134
1135 /* channel switch handled in software */
57eebdf3 1136 if (sw_elem->count <= 1)
42935eca 1137 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1138 else
cc32abd4 1139 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1140 TU_TO_EXP_TIME(sw_elem->count *
1141 cbss->beacon_interval));
cc32abd4
JB		 1142}
1143
1ea6f9c0
JB		 1144static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1145 struct ieee80211_channel *channel,
1146 const u8 *country_ie, u8 country_ie_len,
1147 const u8 *pwr_constr_elem)
cc32abd4 1148{
04b7b2ff
JB		 1149 struct ieee80211_country_ie_triplet *triplet;
1150 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1151 int i, chan_pwr, chan_increment, new_ap_level;
1152 bool have_chan_pwr = false;
cc32abd4 1153
04b7b2ff
JB		 1154 /* Invalid IE */
1155 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1156 return 0;
cc32abd4 1157
04b7b2ff
JB		 1158 triplet = (void *)(country_ie + 3);
1159 country_ie_len -= 3;
1160
1161 switch (channel->band) {
1162 default:
1163 WARN_ON_ONCE(1);
1164 /* fall through */
1165 case IEEE80211_BAND_2GHZ:
1166 case IEEE80211_BAND_60GHZ:
1167 chan_increment = 1;
1168 break;
1169 case IEEE80211_BAND_5GHZ:
1170 chan_increment = 4;
1171 break;
cc32abd4 1172 }
04b7b2ff
JB		 1173
1174 /* find channel */
1175 while (country_ie_len >= 3) {
1176 u8 first_channel = triplet->chans.first_channel;
1177
1178 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1179 goto next;
1180
1181 for (i = 0; i < triplet->chans.num_channels; i++) {
1182 if (first_channel + i * chan_increment == chan) {
1183 have_chan_pwr = true;
1184 chan_pwr = triplet->chans.max_power;
1185 break;
1186 }
1187 }
1188 if (have_chan_pwr)
1189 break;
1190
1191 next:
1192 triplet++;
1193 country_ie_len -= 3;
1194 }
1195
1196 if (!have_chan_pwr)
1ea6f9c0 1197 return 0;
04b7b2ff
JB		 1198
1199 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1200
1ea6f9c0
JB		 1201 if (sdata->ap_power_level == new_ap_level)
1202 return 0;
04b7b2ff
JB		 1203
1204 sdata_info(sdata,
1205 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1206 new_ap_level, chan_pwr, *pwr_constr_elem,
1207 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1208 sdata->ap_power_level = new_ap_level;
1209 if (__ieee80211_recalc_txpower(sdata))
1210 return BSS_CHANGED_TXPOWER;
1211 return 0;
cc32abd4
JB		 1212}
1213
965bedad
JB		 1214/* powersave */
1215static void ieee80211_enable_ps(struct ieee80211_local *local,
1216 struct ieee80211_sub_if_data *sdata)
1217{
1218 struct ieee80211_conf *conf = &local->hw.conf;
1219
d5edaedc
JB		 1220 /*
1221 * If we are scanning right now then the parameters will
1222 * take effect when scan finishes.
1223 */
fbe9c429 1224 if (local->scanning)
d5edaedc
JB		 1225 return;
1226
965bedad
JB		 1227 if (conf->dynamic_ps_timeout > 0 &&
1228 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1229 mod_timer(&local->dynamic_ps_timer, jiffies +
1230 msecs_to_jiffies(conf->dynamic_ps_timeout));
1231 } else {
1232 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1233 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1234
2a13052f
JO		 1235 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1236 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1237 return;
1238
1239 conf->flags |= IEEE80211_CONF_PS;
1240 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1241 }
1242}
1243
1244static void ieee80211_change_ps(struct ieee80211_local *local)
1245{
1246 struct ieee80211_conf *conf = &local->hw.conf;
1247
1248 if (local->ps_sdata) {
965bedad
JB		 1249 ieee80211_enable_ps(local, local->ps_sdata);
1250 } else if (conf->flags & IEEE80211_CONF_PS) {
1251 conf->flags &= ~IEEE80211_CONF_PS;
1252 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1253 del_timer_sync(&local->dynamic_ps_timer);
1254 cancel_work_sync(&local->dynamic_ps_enable_work);
1255 }
1256}
1257
808118cb
JY		 1258static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1259{
1260 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1261 struct sta_info *sta = NULL;
c2c98fde 1262 bool authorized = false;
808118cb
JY		 1263
1264 if (!mgd->powersave)
1265 return false;
1266
05cb9108
JB		 1267 if (mgd->broken_ap)
1268 return false;
1269
808118cb
JY		 1270 if (!mgd->associated)
1271 return false;
1272
808118cb
JY		 1273 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1274 IEEE80211_STA_CONNECTION_POLL))
1275 return false;
1276
1277 rcu_read_lock();
1278 sta = sta_info_get(sdata, mgd->bssid);
1279 if (sta)
c2c98fde 1280 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1281 rcu_read_unlock();
1282
c2c98fde 1283 return authorized;
808118cb
JY		 1284}
1285
965bedad 1286/* need to hold RTNL or interface lock */
10f644a4 1287void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1288{
1289 struct ieee80211_sub_if_data *sdata, *found = NULL;
1290 int count = 0;
195e294d 1291 int timeout;
965bedad
JB		 1292
1293 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1294 local->ps_sdata = NULL;
1295 return;
1296 }
1297
1298 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1299 if (!ieee80211_sdata_running(sdata))
965bedad 1300 continue;
8c7914de
RM		 1301 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1302 /* If an AP vif is found, then disable PS
1303 * by setting the count to zero thereby setting
1304 * ps_sdata to NULL.
1305 */
1306 count = 0;
1307 break;
1308 }
965bedad
JB		 1309 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1310 continue;
1311 found = sdata;
1312 count++;
1313 }
1314
808118cb 1315 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1316 s32 beaconint_us;
1317
1318 if (latency < 0)
ed77134b 1319 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1320
1321 beaconint_us = ieee80211_tu_to_usec(
1322 found->vif.bss_conf.beacon_int);
1323
ff616381 1324 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1325 if (timeout < 0) {
1326 /*
ff616381
JO		 1327 * Go to full PSM if the user configures a very low
1328 * latency requirement.
0ab82b04
EP		 1329 * The 2000 second value is there for compatibility
1330 * until the PM_QOS_NETWORK_LATENCY is configured
1331 * with real values.
195e294d 1332 */
0ab82b04
EP		 1333 if (latency > (1900 * USEC_PER_MSEC) &&
1334 latency != (2000 * USEC_PER_SEC))
195e294d 1335 timeout = 0;
ff616381
JO		 1336 else
1337 timeout = 100;
195e294d 1338 }
09b85568 1339 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1340
04fe2037 1341 if (beaconint_us > latency) {
10f644a4 1342 local->ps_sdata = NULL;
04fe2037 1343 } else {
04fe2037 1344 int maxslp = 1;
826262c3 1345 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1346
1347 /* If the TIM IE is invalid, pretend the value is 1 */
1348 if (!dtimper)
1349 dtimper = 1;
1350 else if (dtimper > 1)
04fe2037
JB		 1351 maxslp = min_t(int, dtimper,
1352 latency / beaconint_us);
1353
9ccebe61 1354 local->hw.conf.max_sleep_period = maxslp;
56007a02 1355 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1356 local->ps_sdata = found;
04fe2037 1357 }
10f644a4 1358 } else {
965bedad 1359 local->ps_sdata = NULL;
10f644a4 1360 }
965bedad
JB		 1361
1362 ieee80211_change_ps(local);
1363}
1364
ab095877
EP		 1365void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1366{
1367 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1368
1369 if (sdata->vif.bss_conf.ps != ps_allowed) {
1370 sdata->vif.bss_conf.ps = ps_allowed;
1371 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1372 }
1373}
1374
965bedad
JB		 1375void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1376{
1377 struct ieee80211_local *local =
1378 container_of(work, struct ieee80211_local,
1379 dynamic_ps_disable_work);
1380
1381 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1382 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1383 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1384 }
1385
1386 ieee80211_wake_queues_by_reason(&local->hw,
1387 IEEE80211_QUEUE_STOP_REASON_PS);
1388}
1389
1390void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1391{
1392 struct ieee80211_local *local =
1393 container_of(work, struct ieee80211_local,
1394 dynamic_ps_enable_work);
1395 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1396 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1397 unsigned long flags;
1398 int q;
965bedad
JB		 1399
1400 /* can only happen when PS was just disabled anyway */
1401 if (!sdata)
1402 return;
1403
5e34069c
CL		 1404 ifmgd = &sdata->u.mgd;
1405
965bedad
JB		 1406 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1407 return;
1408
09b85568 1409 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1410 /* don't enter PS if TX frames are pending */
1411 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1412 mod_timer(&local->dynamic_ps_timer, jiffies +
1413 msecs_to_jiffies(
1414 local->hw.conf.dynamic_ps_timeout));
1415 return;
1416 }
77b7023a
AN		 1417
1418 /*
1419 * transmission can be stopped by others which leads to
1420 * dynamic_ps_timer expiry. Postpone the ps timer if it
1421 * is not the actual idle state.
1422 */
1423 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1424 for (q = 0; q < local->hw.queues; q++) {
1425 if (local->queue_stop_reasons[q]) {
1426 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1427 flags);
1428 mod_timer(&local->dynamic_ps_timer, jiffies +
1429 msecs_to_jiffies(
1430 local->hw.conf.dynamic_ps_timeout));
1431 return;
1432 }
1433 }
1434 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1435 }
1ddc2867 1436
375177bf 1437 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1438 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1439 netif_tx_stop_all_queues(sdata->dev);
965bedad 1440
e8306f98
VN		 1441 if (drv_tx_frames_pending(local))
1442 mod_timer(&local->dynamic_ps_timer, jiffies +
1443 msecs_to_jiffies(
1444 local->hw.conf.dynamic_ps_timeout));
1445 else {
1446 ieee80211_send_nullfunc(local, sdata, 1);
1447 /* Flush to get the tx status of nullfunc frame */
1448 drv_flush(local, false);
1449 }
f3e85b9e
VN		 1450 }
1451
2a13052f
JO		 1452 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1453 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1454 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1455 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1456 local->hw.conf.flags |= IEEE80211_CONF_PS;
1457 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1458 }
f3e85b9e 1459
77b7023a
AN		 1460 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1461 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1462}
1463
1464void ieee80211_dynamic_ps_timer(unsigned long data)
1465{
1466 struct ieee80211_local *local = (void *) data;
1467
78f1a8b7 1468 if (local->quiescing || local->suspended)
5bb644a0
JB		 1469 return;
1470
42935eca 1471 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1472}
1473
164eb02d
SW		 1474void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1475{
1476 struct delayed_work *delayed_work =
1477 container_of(work, struct delayed_work, work);
1478 struct ieee80211_sub_if_data *sdata =
1479 container_of(delayed_work, struct ieee80211_sub_if_data,
1480 dfs_cac_timer_work);
1481
1482 ieee80211_vif_release_channel(sdata);
1483
1484 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1485}
1486
60f8b39c 1487/* MLME */
7d25745d 1488static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1489 struct ieee80211_sub_if_data *sdata,
4a3cb702 1490 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1491{
f0706e82 1492 struct ieee80211_tx_queue_params params;
4ced3f74 1493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1494 size_t left;
1495 int count;
4a3cb702
JB		 1496 const u8 *pos;
1497 u8 uapsd_queues = 0;
f0706e82 1498
e1b3ec1a 1499 if (!local->ops->conf_tx)
7d25745d 1500 return false;
e1b3ec1a 1501
32c5057b 1502 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1503 return false;
3434fbd3
JB		 1504
1505 if (!wmm_param)
7d25745d 1506 return false;
3434fbd3 1507
f0706e82 1508 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1509 return false;
ab13315a
KV		 1510
1511 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1512 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1513
f0706e82 1514 count = wmm_param[6] & 0x0f;
46900298 1515 if (count == ifmgd->wmm_last_param_set)
7d25745d 1516 return false;
46900298 1517 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1518
1519 pos = wmm_param + 8;
1520 left = wmm_param_len - 8;
1521
1522 memset(&params, 0, sizeof(params));
1523
00e96dec 1524 sdata->wmm_acm = 0;
f0706e82
JB		 1525 for (; left >= 4; left -= 4, pos += 4) {
1526 int aci = (pos[0] >> 5) & 0x03;
1527 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1528 bool uapsd = false;
f0706e82
JB		 1529 int queue;
1530
1531 switch (aci) {
0eeb59fe 1532 case 1: /* AC_BK */
e100bb64 1533 queue = 3;
988c0f72 1534 if (acm)
00e96dec 1535 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1536 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1537 uapsd = true;
f0706e82 1538 break;
0eeb59fe 1539 case 2: /* AC_VI */
e100bb64 1540 queue = 1;
988c0f72 1541 if (acm)
00e96dec 1542 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1543 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1544 uapsd = true;
f0706e82 1545 break;
0eeb59fe 1546 case 3: /* AC_VO */
e100bb64 1547 queue = 0;
988c0f72 1548 if (acm)
00e96dec 1549 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1550 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1551 uapsd = true;
f0706e82 1552 break;
0eeb59fe 1553 case 0: /* AC_BE */
f0706e82 1554 default:
e100bb64 1555 queue = 2;
988c0f72 1556 if (acm)
00e96dec 1557 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1558 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1559 uapsd = true;
f0706e82
JB		 1560 break;
1561 }
1562
1563 params.aifs = pos[0] & 0x0f;
1564 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1565 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1566 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1567 params.uapsd = uapsd;
1568
bdcbd8e0
JB		 1569 mlme_dbg(sdata,
1570 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1571 queue, aci, acm,
1572 params.aifs, params.cw_min, params.cw_max,
1573 params.txop, params.uapsd);
f6f3def3
EP		 1574 sdata->tx_conf[queue] = params;
1575 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1576 sdata_err(sdata,
1577 "failed to set TX queue parameters for queue %d\n",
1578 queue);
f0706e82 1579 }
e1b3ec1a
SG		 1580
1581 /* enable WMM or activate new settings */
4ced3f74 1582 sdata->vif.bss_conf.qos = true;
7d25745d 1583 return true;
f0706e82
JB		 1584}
1585
925e64c3
SG		 1586static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1587{
1588 lockdep_assert_held(&sdata->local->mtx);
1589
1590 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1591 IEEE80211_STA_BEACON_POLL);
1592 ieee80211_run_deferred_scan(sdata->local);
1593}
1594
1595static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1596{
1597 mutex_lock(&sdata->local->mtx);
1598 __ieee80211_stop_poll(sdata);
1599 mutex_unlock(&sdata->local->mtx);
1600}
1601
7a5158ef
JB		 1602static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1603 u16 capab, bool erp_valid, u8 erp)
5628221c 1604{
bda3933a 1605 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1606 u32 changed = 0;
7a5158ef
JB		 1607 bool use_protection;
1608 bool use_short_preamble;
1609 bool use_short_slot;
1610
1611 if (erp_valid) {
1612 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1613 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1614 } else {
1615 use_protection = false;
1616 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1617 }
1618
1619 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1620 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1621 use_short_slot = true;
5628221c 1622
471b3efd 1623 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1624 bss_conf->use_cts_prot = use_protection;
1625 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1626 }
7e9ed188 1627
d43c7b37 1628 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1629 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1630 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1631 }
d9430a32 1632
7a5158ef 1633 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1634 bss_conf->use_short_slot = use_short_slot;
1635 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1636 }
1637
1638 return changed;
1639}
1640
f698d856 1641static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1642 struct cfg80211_bss *cbss,
ae5eb026 1643 u32 bss_info_changed)
f0706e82 1644{
0c1ad2ca 1645 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1646 struct ieee80211_local *local = sdata->local;
68542962 1647 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1648
ae5eb026 1649 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1650 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1651 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1652
7ccc8bd7
FF		 1653 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1654 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1655
0c1ad2ca
JB		 1656 sdata->u.mgd.associated = cbss;
1657 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1658
17e4ec14
JM		 1659 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1660
488dd7b5 1661 if (sdata->vif.p2p) {
9caf0364 1662 const struct cfg80211_bss_ies *ies;
488dd7b5 1663
9caf0364
JB		 1664 rcu_read_lock();
1665 ies = rcu_dereference(cbss->ies);
1666 if (ies) {
1667 u8 noa[2];
1668 int ret;
1669
1670 ret = cfg80211_get_p2p_attr(
1671 ies->data, ies->len,
1672 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1673 noa, sizeof(noa));
1674 if (ret >= 2) {
1675 bss_conf->p2p_oppps = noa[1] & 0x80;
1676 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1677 bss_info_changed |= BSS_CHANGED_P2P_PS;
1678 sdata->u.mgd.p2p_noa_index = noa[0];
1679 }
488dd7b5 1680 }
9caf0364 1681 rcu_read_unlock();
488dd7b5
JB		 1682 }
1683
b291ba11 1684 /* just to be sure */
925e64c3 1685 ieee80211_stop_poll(sdata);
b291ba11 1686
9ac19a90 1687 ieee80211_led_assoc(local, 1);
9306102e 1688
c65dd147 1689 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1690 /*
1691 * If the AP is buggy we may get here with no DTIM period
1692 * known, so assume it's 1 which is the only safe assumption
1693 * in that case, although if the TIM IE is broken powersave
1694 * probably just won't work at all.
1695 */
1696 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1697 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1698 } else {
e5b900d2 1699 bss_conf->dtim_period = 0;
826262c3 1700 }
e5b900d2 1701
68542962 1702 bss_conf->assoc = 1;
9cef8737 1703
a97c13c3 1704 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1705 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1706 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1707 bss_info_changed |= BSS_CHANGED_CQM;
1708
68542962 1709 /* Enable ARP filtering */
0f19b41e 1710 if (bss_conf->arp_addr_cnt)
68542962 1711 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1712
ae5eb026 1713 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1714
056508dc
JB		 1715 mutex_lock(&local->iflist_mtx);
1716 ieee80211_recalc_ps(local, -1);
1717 mutex_unlock(&local->iflist_mtx);
e0cb686f 1718
04ecd257 1719 ieee80211_recalc_smps(sdata);
ab095877
EP		 1720 ieee80211_recalc_ps_vif(sdata);
1721
8a5b33f5 1722 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1723 netif_carrier_on(sdata->dev);
f0706e82
JB		 1724}
1725
e69e95db 1726static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1727 u16 stype, u16 reason, bool tx,
1728 u8 *frame_buf)
aa458d17 1729{
46900298 1730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1731 struct ieee80211_local *local = sdata->local;
3cc5240b 1732 u32 changed = 0;
aa458d17 1733
77fdaa12
JB		 1734 ASSERT_MGD_MTX(ifmgd);
1735
37ad3888
JB		 1736 if (WARN_ON_ONCE(tx && !frame_buf))
1737 return;
1738
b291ba11
JB		 1739 if (WARN_ON(!ifmgd->associated))
1740 return;
1741
79543d8e
DS		 1742 ieee80211_stop_poll(sdata);
1743
77fdaa12 1744 ifmgd->associated = NULL;
77fdaa12
JB		 1745
1746 /*
1747 * we need to commit the associated = NULL change because the
1748 * scan code uses that to determine whether this iface should
1749 * go to/wake up from powersave or not -- and could otherwise
1750 * wake the queues erroneously.
1751 */
1752 smp_mb();
1753
1754 /*
1755 * Thus, we can only afterwards stop the queues -- to account
1756 * for the case where another CPU is finishing a scan at this
1757 * time -- we don't want the scan code to enable queues.
1758 */
aa458d17 1759
8a5b33f5 1760 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1761 netif_carrier_off(sdata->dev);
1762
88bc40e8
EP		 1763 /*
1764 * if we want to get out of ps before disassoc (why?) we have
1765 * to do it before sending disassoc, as otherwise the null-packet
1766 * won't be valid.
1767 */
1768 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1769 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1770 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1771 }
1772 local->ps_sdata = NULL;
1773
ab095877
EP		 1774 /* disable per-vif ps */
1775 ieee80211_recalc_ps_vif(sdata);
1776
f823981e
EP		 1777 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1778 if (tx)
1779 drv_flush(local, false);
1780
37ad3888
JB		 1781 /* deauthenticate/disassociate now */
1782 if (tx || frame_buf)
88a9e31c
EP		 1783 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1784 reason, tx, frame_buf);
37ad3888
JB		 1785
1786 /* flush out frame */
1787 if (tx)
1788 drv_flush(local, false);
1789
88a9e31c
EP		 1790 /* clear bssid only after building the needed mgmt frames */
1791 memset(ifmgd->bssid, 0, ETH_ALEN);
1792
37ad3888 1793 /* remove AP and TDLS peers */
051007d9 1794 sta_info_flush_defer(sdata);
37ad3888
JB		 1795
1796 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1797 changed |= ieee80211_reset_erp_info(sdata);
1798
f5e5bf25 1799 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1800 changed |= BSS_CHANGED_ASSOC;
1801 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1802
488dd7b5
JB		 1803 sdata->vif.bss_conf.p2p_ctwindow = 0;
1804 sdata->vif.bss_conf.p2p_oppps = false;
1805
dd5ecfea 1806 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1807 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1808 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1809 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1810 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1811
1ea6f9c0 1812 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1813
520eb820
KV		 1814 del_timer_sync(&local->dynamic_ps_timer);
1815 cancel_work_sync(&local->dynamic_ps_enable_work);
1816
68542962 1817 /* Disable ARP filtering */
0f19b41e 1818 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1819 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1820
3abead59
JB		 1821 sdata->vif.bss_conf.qos = false;
1822 changed |= BSS_CHANGED_QOS;
1823
0aaffa9b
JB		 1824 /* The BSSID (not really interesting) and HT changed */
1825 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1826 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1827
3abead59
JB		 1828 /* disassociated - set to defaults now */
1829 ieee80211_set_wmm_default(sdata, false);
1830
b9dcf712
JB		 1831 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1832 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1833 del_timer_sync(&sdata->u.mgd.timer);
1834 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1835
1836 sdata->u.mgd.timers_running = 0;
028e8da0 1837
826262c3
JB		 1838 sdata->vif.bss_conf.dtim_period = 0;
1839
028e8da0
JB		 1840 ifmgd->flags = 0;
1841 ieee80211_vif_release_channel(sdata);
aa458d17 1842}
f0706e82 1843
3cf335d5
KV		 1844void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1845 struct ieee80211_hdr *hdr)
1846{
1847 /*
1848 * We can postpone the mgd.timer whenever receiving unicast frames
1849 * from AP because we know that the connection is working both ways
1850 * at that time. But multicast frames (and hence also beacons) must
1851 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1852 * data idle periods for sending the periodic probe request to the
1853 * AP we're connected to.
3cf335d5 1854 */
b291ba11
JB		 1855 if (is_multicast_ether_addr(hdr->addr1))
1856 return;
1857
be099e82 1858 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1859}
f0706e82 1860
4e5ff376
FF		 1861static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1862{
1863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1864 struct ieee80211_local *local = sdata->local;
4e5ff376 1865
133d40f9 1866 mutex_lock(&local->mtx);
4e5ff376 1867 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1868 IEEE80211_STA_CONNECTION_POLL))) {
1869 mutex_unlock(&local->mtx);
1870 return;
1871 }
4e5ff376 1872
925e64c3 1873 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1874
1875 mutex_lock(&local->iflist_mtx);
1876 ieee80211_recalc_ps(local, -1);
1877 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1878
1879 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1880 goto out;
4e5ff376
FF		 1881
1882 /*
1883 * We've received a probe response, but are not sure whether
1884 * we have or will be receiving any beacons or data, so let's
1885 * schedule the timers again, just in case.
1886 */
1887 ieee80211_sta_reset_beacon_monitor(sdata);
1888
1889 mod_timer(&ifmgd->conn_mon_timer,
1890 round_jiffies_up(jiffies +
1891 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1892out:
133d40f9 1893 mutex_unlock(&local->mtx);
4e5ff376
FF		 1894}
1895
1896void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1897 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1898{
75706d0e 1899 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1900 return;
1901
4e5ff376
FF		 1902 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1903 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1904 if (ack)
cab1c7fd 1905 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1906 else
1907 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1908 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1909 return;
4e5ff376 1910 }
cab1c7fd
WD		 1911
1912 if (ack)
1913 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1914}
1915
a43abf29
ML		 1916static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1917{
1918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1919 const u8 *ssid;
f01a067d 1920 u8 *dst = ifmgd->associated->bssid;
180205bd 1921 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1922
1923 /*
1924 * Try sending broadcast probe requests for the last three
1925 * probe requests after the first ones failed since some
1926 * buggy APs only support broadcast probe requests.
1927 */
1928 if (ifmgd->probe_send_count >= unicast_limit)
1929 dst = NULL;
a43abf29 1930
4e5ff376
FF		 1931 /*
1932 * When the hardware reports an accurate Tx ACK status, it's
1933 * better to send a nullfunc frame instead of a probe request,
1934 * as it will kick us off the AP quickly if we aren't associated
1935 * anymore. The timeout will be reset if the frame is ACKed by
1936 * the AP.
1937 */
992e68bf
SD		 1938 ifmgd->probe_send_count++;
1939
04ac3c0e
FF		 1940 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1941 ifmgd->nullfunc_failed = false;
4e5ff376 1942 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1943 } else {
88c868c4
SG		 1944 int ssid_len;
1945
9caf0364 1946 rcu_read_lock();
4e5ff376 1947 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1948 if (WARN_ON_ONCE(ssid == NULL))
1949 ssid_len = 0;
1950 else
1951 ssid_len = ssid[1];
1952
1953 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1954 0, (u32) -1, true, 0,
55de908a 1955 ifmgd->associated->channel, false);
9caf0364 1956 rcu_read_unlock();
4e5ff376 1957 }
a43abf29 1958
180205bd 1959 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1960 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1961 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1962 drv_flush(sdata->local, false);
a43abf29
ML		 1963}
1964
b291ba11
JB		 1965static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1966 bool beacon)
04de8381 1967{
04de8381 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1969 bool already = false;
34bfc411 1970
9607e6b6 1971 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1972 return;
1973
77fdaa12
JB		 1974 mutex_lock(&ifmgd->mtx);
1975
1976 if (!ifmgd->associated)
1977 goto out;
1978
133d40f9
SG		 1979 mutex_lock(&sdata->local->mtx);
1980
1981 if (sdata->local->tmp_channel || sdata->local->scanning) {
1982 mutex_unlock(&sdata->local->mtx);
1983 goto out;
1984 }
1985
e87cc472 1986 if (beacon)
bdcbd8e0 1987 mlme_dbg_ratelimited(sdata,
112c31f0 1988 "detected beacon loss from AP - probing\n");
bdcbd8e0 1989
6efb71b0
HS		 1990 ieee80211_cqm_rssi_notify(&sdata->vif,
1991 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1992
b291ba11
JB		 1993 /*
1994 * The driver/our work has already reported this event or the
1995 * connection monitoring has kicked in and we have already sent
1996 * a probe request. Or maybe the AP died and the driver keeps
1997 * reporting until we disassociate...
1998 *
1999 * In either case we have to ignore the current call to this
2000 * function (except for setting the correct probe reason bit)
2001 * because otherwise we would reset the timer every time and
2002 * never check whether we received a probe response!
2003 */
2004 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2005 IEEE80211_STA_CONNECTION_POLL))
2006 already = true;
2007
2008 if (beacon)
2009 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2010 else
2011 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2012
133d40f9
SG		 2013 mutex_unlock(&sdata->local->mtx);
2014
b291ba11
JB		 2015 if (already)
2016 goto out;
2017
4e751843
JB		 2018 mutex_lock(&sdata->local->iflist_mtx);
2019 ieee80211_recalc_ps(sdata->local, -1);
2020 mutex_unlock(&sdata->local->iflist_mtx);
2021
a43abf29
ML		 2022 ifmgd->probe_send_count = 0;
2023 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2024 out:
2025 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2026}
2027
a619a4c0
JO		 2028struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2029 struct ieee80211_vif *vif)
2030{
2031 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2033 struct cfg80211_bss *cbss;
a619a4c0
JO		 2034 struct sk_buff *skb;
2035 const u8 *ssid;
88c868c4 2036 int ssid_len;
a619a4c0
JO		 2037
2038 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2039 return NULL;
2040
2041 ASSERT_MGD_MTX(ifmgd);
2042
d9b3b28b
EP		 2043 if (ifmgd->associated)
2044 cbss = ifmgd->associated;
2045 else if (ifmgd->auth_data)
2046 cbss = ifmgd->auth_data->bss;
2047 else if (ifmgd->assoc_data)
2048 cbss = ifmgd->assoc_data->bss;
2049 else
a619a4c0
JO		 2050 return NULL;
2051
9caf0364 2052 rcu_read_lock();
d9b3b28b 2053 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2054 if (WARN_ON_ONCE(ssid == NULL))
2055 ssid_len = 0;
2056 else
2057 ssid_len = ssid[1];
2058
d9b3b28b 2059 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2060 (u32) -1, cbss->channel,
6b77863b 2061 ssid + 2, ssid_len,
85a237fe 2062 NULL, 0, true);
9caf0364 2063 rcu_read_unlock();
a619a4c0
JO		 2064
2065 return skb;
2066}
2067EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2068
eef9e54c 2069static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2070{
2071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2072 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2073
2074 mutex_lock(&ifmgd->mtx);
2075 if (!ifmgd->associated) {
2076 mutex_unlock(&ifmgd->mtx);
2077 return;
2078 }
2079
37ad3888
JB		 2080 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2081 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2082 true, frame_buf);
882a7c69 2083 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 2084 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2085 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2086 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2087
1e4dcd01
JO		 2088 /*
2089 * must be outside lock due to cfg80211,
2090 * but that's not a problem.
2091 */
6ae16775 2092 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2093}
2094
cc74c0c7 2095static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2096{
2097 struct ieee80211_sub_if_data *sdata =
2098 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2099 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2101 struct sta_info *sta;
2102
2103 if (ifmgd->associated) {
30fa9047 2104 rcu_read_lock();
a85e1d55
PS		 2105 sta = sta_info_get(sdata, ifmgd->bssid);
2106 if (sta)
2107 sta->beacon_loss_count++;
30fa9047 2108 rcu_read_unlock();
a85e1d55 2109 }
b291ba11 2110
682bd38b 2111 if (ifmgd->connection_loss) {
882a7c69
JB		 2112 sdata_info(sdata, "Connection to AP %pM lost\n",
2113 ifmgd->bssid);
eef9e54c 2114 __ieee80211_disconnect(sdata);
882a7c69 2115 } else {
1e4dcd01 2116 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2117 }
2118}
2119
2120static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2121{
2122 struct ieee80211_sub_if_data *sdata =
2123 container_of(work, struct ieee80211_sub_if_data,
2124 u.mgd.csa_connection_drop_work);
2125
eef9e54c 2126 __ieee80211_disconnect(sdata);
b291ba11
JB		 2127}
2128
04de8381
KV		 2129void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2130{
2131 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2132 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2133
b5878a2d
JB		 2134 trace_api_beacon_loss(sdata);
2135
1e4dcd01 2136 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2137 sdata->u.mgd.connection_loss = false;
1e4dcd01 2138 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2139}
2140EXPORT_SYMBOL(ieee80211_beacon_loss);
2141
1e4dcd01
JO		 2142void ieee80211_connection_loss(struct ieee80211_vif *vif)
2143{
2144 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2145 struct ieee80211_hw *hw = &sdata->local->hw;
2146
b5878a2d
JB		 2147 trace_api_connection_loss(sdata);
2148
682bd38b 2149 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2150 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2151}
2152EXPORT_SYMBOL(ieee80211_connection_loss);
2153
2154
66e67e41
JB		 2155static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2156 bool assoc)
2157{
2158 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2159
2160 lockdep_assert_held(&sdata->u.mgd.mtx);
2161
66e67e41
JB		 2162 if (!assoc) {
2163 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2164
2165 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2166 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2167 sdata->u.mgd.flags = 0;
55de908a 2168 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2169 }
2170
5b112d3d 2171 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2172 kfree(auth_data);
2173 sdata->u.mgd.auth_data = NULL;
2174}
2175
2176static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2177 struct ieee80211_mgmt *mgmt, size_t len)
2178{
1672c0e3 2179 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2180 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2181 u8 *pos;
2182 struct ieee802_11_elems elems;
1672c0e3 2183 u32 tx_flags = 0;
66e67e41
JB		 2184
2185 pos = mgmt->u.auth.variable;
2186 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2187 if (!elems.challenge)
2188 return;
2189 auth_data->expected_transaction = 4;
a1845fc7 2190 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2191 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2192 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2193 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2194 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2195 elems.challenge - 2, elems.challenge_len + 2,
2196 auth_data->bss->bssid, auth_data->bss->bssid,
2197 auth_data->key, auth_data->key_len,
1672c0e3 2198 auth_data->key_idx, tx_flags);
66e67e41
JB		 2199}
2200
2201static enum rx_mgmt_action __must_check
2202ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2203 struct ieee80211_mgmt *mgmt, size_t len)
2204{
2205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2206 u8 bssid[ETH_ALEN];
2207 u16 auth_alg, auth_transaction, status_code;
2208 struct sta_info *sta;
2209
2210 lockdep_assert_held(&ifmgd->mtx);
2211
2212 if (len < 24 + 6)
2213 return RX_MGMT_NONE;
2214
2215 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2216 return RX_MGMT_NONE;
2217
2218 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2219
b203ca39 2220 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2221 return RX_MGMT_NONE;
2222
2223 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2224 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2225 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2226
2227 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2228 auth_transaction != ifmgd->auth_data->expected_transaction) {
2229 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2230 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2231 auth_transaction,
2232 ifmgd->auth_data->expected_transaction);
66e67e41 2233 return RX_MGMT_NONE;
0f4126e8 2234 }
66e67e41
JB		 2235
2236 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2237 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2238 mgmt->sa, status_code);
dac211ec
EP		 2239 ieee80211_destroy_auth_data(sdata, false);
2240 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2241 }
2242
2243 switch (ifmgd->auth_data->algorithm) {
2244 case WLAN_AUTH_OPEN:
2245 case WLAN_AUTH_LEAP:
2246 case WLAN_AUTH_FT:
6b8ece3a 2247 case WLAN_AUTH_SAE:
66e67e41
JB		 2248 break;
2249 case WLAN_AUTH_SHARED_KEY:
2250 if (ifmgd->auth_data->expected_transaction != 4) {
2251 ieee80211_auth_challenge(sdata, mgmt, len);
2252 /* need another frame */
2253 return RX_MGMT_NONE;
2254 }
2255 break;
2256 default:
2257 WARN_ONCE(1, "invalid auth alg %d",
2258 ifmgd->auth_data->algorithm);
2259 return RX_MGMT_NONE;
2260 }
2261
bdcbd8e0 2262 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2263 ifmgd->auth_data->done = true;
2264 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2265 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2266 run_again(ifmgd, ifmgd->auth_data->timeout);
2267
6b8ece3a
JM		 2268 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2269 ifmgd->auth_data->expected_transaction != 2) {
2270 /*
2271 * Report auth frame to user space for processing since another
2272 * round of Authentication frames is still needed.
2273 */
2274 return RX_MGMT_CFG80211_RX_AUTH;
2275 }
2276
66e67e41
JB		 2277 /* move station state to auth */
2278 mutex_lock(&sdata->local->sta_mtx);
2279 sta = sta_info_get(sdata, bssid);
2280 if (!sta) {
2281 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2282 goto out_err;
2283 }
2284 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2285 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2286 goto out_err;
2287 }
2288 mutex_unlock(&sdata->local->sta_mtx);
2289
2290 return RX_MGMT_CFG80211_RX_AUTH;
2291 out_err:
2292 mutex_unlock(&sdata->local->sta_mtx);
2293 /* ignore frame -- wait for timeout */
2294 return RX_MGMT_NONE;
2295}
2296
2297
77fdaa12
JB		 2298static enum rx_mgmt_action __must_check
2299ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2300 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2301{
46900298 2302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2303 const u8 *bssid = NULL;
f0706e82
JB		 2304 u16 reason_code;
2305
66e67e41
JB		 2306 lockdep_assert_held(&ifmgd->mtx);
2307
f4ea83dd 2308 if (len < 24 + 2)
77fdaa12 2309 return RX_MGMT_NONE;
f0706e82 2310
66e67e41 2311 if (!ifmgd->associated ||
b203ca39 2312 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2313 return RX_MGMT_NONE;
77fdaa12 2314
0c1ad2ca 2315 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2316
2317 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2318
bdcbd8e0
JB		 2319 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2320 bssid, reason_code);
77fdaa12 2321
37ad3888
JB		 2322 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2323
77fdaa12 2324 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2325}
2326
2327
77fdaa12
JB		 2328static enum rx_mgmt_action __must_check
2329ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2330 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2331{
46900298 2332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2333 u16 reason_code;
2334
66e67e41 2335 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2336
66e67e41 2337 if (len < 24 + 2)
77fdaa12
JB		 2338 return RX_MGMT_NONE;
2339
66e67e41 2340 if (!ifmgd->associated ||
b203ca39 2341 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2342 return RX_MGMT_NONE;
f0706e82
JB		 2343
2344 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2345
bdcbd8e0
JB		 2346 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2347 mgmt->sa, reason_code);
f0706e82 2348
37ad3888
JB		 2349 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2350
77fdaa12 2351 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2352}
2353
c74d084f
CL		 2354static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2355 u8 *supp_rates, unsigned int supp_rates_len,
2356 u32 *rates, u32 *basic_rates,
2357 bool *have_higher_than_11mbit,
2358 int *min_rate, int *min_rate_index)
2359{
2360 int i, j;
2361
2362 for (i = 0; i < supp_rates_len; i++) {
2363 int rate = (supp_rates[i] & 0x7f) * 5;
2364 bool is_basic = !!(supp_rates[i] & 0x80);
2365
2366 if (rate > 110)
2367 *have_higher_than_11mbit = true;
2368
2369 /*
2370 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2371 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2372 *
2373 * Note: Even through the membership selector and the basic
2374 * rate flag share the same bit, they are not exactly
2375 * the same.
2376 */
2377 if (!!(supp_rates[i] & 0x80) &&
2378 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2379 continue;
2380
2381 for (j = 0; j < sband->n_bitrates; j++) {
2382 if (sband->bitrates[j].bitrate == rate) {
2383 *rates |= BIT(j);
2384 if (is_basic)
2385 *basic_rates |= BIT(j);
2386 if (rate < *min_rate) {
2387 *min_rate = rate;
2388 *min_rate_index = j;
2389 }
2390 break;
2391 }
2392 }
2393 }
2394}
f0706e82 2395
66e67e41
JB		 2396static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2397 bool assoc)
2398{
2399 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2400
2401 lockdep_assert_held(&sdata->u.mgd.mtx);
2402
66e67e41
JB		 2403 if (!assoc) {
2404 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2405
2406 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2407 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2408 sdata->u.mgd.flags = 0;
55de908a 2409 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2410 }
2411
2412 kfree(assoc_data);
2413 sdata->u.mgd.assoc_data = NULL;
2414}
2415
2416static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2417 struct cfg80211_bss *cbss,
af6b6374 2418 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2419{
46900298 2420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2421 struct ieee80211_local *local = sdata->local;
8318d78a 2422 struct ieee80211_supported_band *sband;
f0706e82 2423 struct sta_info *sta;
af6b6374 2424 u8 *pos;
af6b6374 2425 u16 capab_info, aid;
f0706e82 2426 struct ieee802_11_elems elems;
bda3933a 2427 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2428 u32 changed = 0;
c74d084f 2429 int err;
f0706e82 2430
af6b6374 2431 /* AssocResp and ReassocResp have identical structure */
f0706e82 2432
f0706e82 2433 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2434 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2435
1dd84aa2 2436 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2437 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2438 aid);
1dd84aa2
JB		 2439 aid &= ~(BIT(15) | BIT(14));
2440
05cb9108
JB		 2441 ifmgd->broken_ap = false;
2442
2443 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2444 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2445 aid);
05cb9108
JB		 2446 aid = 0;
2447 ifmgd->broken_ap = true;
2448 }
2449
af6b6374
JB		 2450 pos = mgmt->u.assoc_resp.variable;
2451 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2452
f0706e82 2453 if (!elems.supp_rates) {
bdcbd8e0 2454 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2455 return false;
f0706e82
JB		 2456 }
2457
46900298 2458 ifmgd->aid = aid;
f0706e82 2459
30eb1dc2
JB		 2460 /*
2461 * We previously checked these in the beacon/probe response, so
2462 * they should be present here. This is just a safety net.
2463 */
2464 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2465 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2466 sdata_info(sdata,
2467 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2468 return false;
2469 }
2470
2471 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2472 (!elems.vht_cap_elem || !elems.vht_operation)) {
2473 sdata_info(sdata,
2474 "VHT AP is missing VHT capability/operation in AssocResp\n");
2475 return false;
2476 }
2477
2a33bee2
GE		 2478 mutex_lock(&sdata->local->sta_mtx);
2479 /*
2480 * station info was already allocated and inserted before
2481 * the association and should be available to us
2482 */
7852e361 2483 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2484 if (WARN_ON(!sta)) {
2485 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2486 return false;
77fdaa12 2487 }
05e5e883 2488
55de908a 2489 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2490
30eb1dc2 2491 /* Set up internal HT/VHT capabilities */
a8243b72 2492 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2493 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2494 elems.ht_cap_elem, sta);
64f68e5d 2495
818255ea
MP		 2496 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2497 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2498 elems.vht_cap_elem, sta);
818255ea 2499
30eb1dc2
JB		 2500 /*
2501 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2502 * in their association response, so ignore that data for our own
2503 * configuration. If it changed since the last beacon, we'll get the
2504 * next beacon and update then.
2505 */
1128958d 2506
bee7f586
JB		 2507 /*
2508 * If an operating mode notification IE is present, override the
2509 * NSS calculation (that would be done in rate_control_rate_init())
2510 * and use the # of streams from that element.
2511 */
2512 if (elems.opmode_notif &&
2513 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2514 u8 nss;
2515
2516 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2517 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2518 nss += 1;
2519 sta->sta.rx_nss = nss;
2520 }
2521
4b7679a5 2522 rate_control_rate_init(sta);
f0706e82 2523
46900298 2524 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2525 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2526
ddf4ac53 2527 if (elems.wmm_param)
c2c98fde 2528 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2529
3e4d40fa 2530 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2531 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2532 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2533 if (err) {
bdcbd8e0
JB		 2534 sdata_info(sdata,
2535 "failed to move station %pM to desired state\n",
2536 sta->sta.addr);
c8987876
JB		 2537 WARN_ON(__sta_info_destroy(sta));
2538 mutex_unlock(&sdata->local->sta_mtx);
2539 return false;
2540 }
2541
7852e361 2542 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2543
f2176d72
JO		 2544 /*
2545 * Always handle WMM once after association regardless
2546 * of the first value the AP uses. Setting -1 here has
2547 * that effect because the AP values is an unsigned
2548 * 4-bit value.
2549 */
2550 ifmgd->wmm_last_param_set = -1;
2551
ddf4ac53 2552 if (elems.wmm_param)
4ced3f74 2553 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2554 elems.wmm_param_len);
aa837e1d 2555 else
3abead59
JB		 2556 ieee80211_set_wmm_default(sdata, false);
2557 changed |= BSS_CHANGED_QOS;
f0706e82 2558
60f8b39c
JB		 2559 /* set AID and assoc capability,
2560 * ieee80211_set_associated() will tell the driver */
2561 bss_conf->aid = aid;
2562 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2563 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2564
d524215f
FF		 2565 /*
2566 * If we're using 4-addr mode, let the AP know that we're
2567 * doing so, so that it can create the STA VLAN on its side
2568 */
2569 if (ifmgd->use_4addr)
2570 ieee80211_send_4addr_nullfunc(local, sdata);
2571
15b7b062 2572 /*
b291ba11
JB		 2573 * Start timer to probe the connection to the AP now.
2574 * Also start the timer that will detect beacon loss.
15b7b062 2575 */
b291ba11 2576 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2577 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2578
af6b6374 2579 return true;
f0706e82
JB		 2580}
2581
66e67e41
JB		 2582static enum rx_mgmt_action __must_check
2583ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2584 struct ieee80211_mgmt *mgmt, size_t len,
2585 struct cfg80211_bss **bss)
2586{
2587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2588 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2589 u16 capab_info, status_code, aid;
2590 struct ieee802_11_elems elems;
2591 u8 *pos;
2592 bool reassoc;
2593
2594 lockdep_assert_held(&ifmgd->mtx);
2595
2596 if (!assoc_data)
2597 return RX_MGMT_NONE;
b203ca39 2598 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2599 return RX_MGMT_NONE;
2600
2601 /*
2602 * AssocResp and ReassocResp have identical structure, so process both
2603 * of them in this function.
2604 */
2605
2606 if (len < 24 + 6)
2607 return RX_MGMT_NONE;
2608
2609 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2610 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2611 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2612 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2613
bdcbd8e0
JB		 2614 sdata_info(sdata,
2615 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2616 reassoc ? "Rea" : "A", mgmt->sa,
2617 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2618
2619 pos = mgmt->u.assoc_resp.variable;
2620 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2621
2622 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2623 elems.timeout_int && elems.timeout_int_len == 5 &&
2624 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2625 u32 tu, ms;
2626 tu = get_unaligned_le32(elems.timeout_int + 1);
2627 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2628 sdata_info(sdata,
2629 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2630 mgmt->sa, tu, ms);
66e67e41 2631 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2632 assoc_data->timeout_started = true;
66e67e41
JB		 2633 if (ms > IEEE80211_ASSOC_TIMEOUT)
2634 run_again(ifmgd, assoc_data->timeout);
2635 return RX_MGMT_NONE;
2636 }
2637
2638 *bss = assoc_data->bss;
2639
2640 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2641 sdata_info(sdata, "%pM denied association (code=%d)\n",
2642 mgmt->sa, status_code);
66e67e41
JB		 2643 ieee80211_destroy_assoc_data(sdata, false);
2644 } else {
66e67e41
JB		 2645 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2646 /* oops -- internal error -- send timeout for now */
10a9109f 2647 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2648 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2649 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2650 }
635d999f 2651 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2652
2653 /*
2654 * destroy assoc_data afterwards, as otherwise an idle
2655 * recalc after assoc_data is NULL but before associated
2656 * is set can cause the interface to go idle
2657 */
2658 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2659 }
2660
2661 return RX_MGMT_CFG80211_RX_ASSOC;
2662}
8e3c1b77 2663
98c8fccf 2664static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2665 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2666 struct ieee80211_rx_status *rx_status,
d45c4172 2667 struct ieee802_11_elems *elems)
98c8fccf
JB		 2668{
2669 struct ieee80211_local *local = sdata->local;
2670 int freq;
c2b13452 2671 struct ieee80211_bss *bss;
98c8fccf 2672 struct ieee80211_channel *channel;
56007a02
JB		 2673 bool need_ps = false;
2674
826262c3
JB		 2675 if ((sdata->u.mgd.associated &&
2676 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2677 (sdata->u.mgd.assoc_data &&
2678 ether_addr_equal(mgmt->bssid,
2679 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2680 /* not previously set so we may need to recalc */
826262c3
JB		 2681 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2682
2683 if (elems->tim && !elems->parse_error) {
4a3cb702 2684 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2685 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2686 }
56007a02 2687 }
98c8fccf
JB		 2688
2689 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2690 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2691 rx_status->band);
98c8fccf
JB		 2692 else
2693 freq = rx_status->freq;
2694
2695 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2696
2697 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2698 return;
2699
98c8fccf 2700 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2701 channel);
77fdaa12
JB		 2702 if (bss)
2703 ieee80211_rx_bss_put(local, bss);
2704
2705 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2706 return;
2707
56007a02
JB		 2708 if (need_ps) {
2709 mutex_lock(&local->iflist_mtx);
2710 ieee80211_recalc_ps(local, -1);
2711 mutex_unlock(&local->iflist_mtx);
2712 }
2713
5bc1420b
JB		 2714 if (elems->ch_switch_ie &&
2715 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2716 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2717 bss, rx_status->mactime);
f0706e82
JB		 2718}
2719
2720
f698d856 2721static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2722 struct sk_buff *skb)
f0706e82 2723{
af6b6374 2724 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2725 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2726 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2727 size_t baselen, len = skb->len;
ae6a44e3
EK		 2728 struct ieee802_11_elems elems;
2729
15b7b062
KV		 2730 ifmgd = &sdata->u.mgd;
2731
77fdaa12
JB		 2732 ASSERT_MGD_MTX(ifmgd);
2733
b203ca39 2734 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2735 return; /* ignore ProbeResp to foreign address */
2736
ae6a44e3
EK		 2737 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2738 if (baselen > len)
2739 return;
2740
2741 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2742 &elems);
2743
d45c4172 2744 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2745
77fdaa12 2746 if (ifmgd->associated &&
b203ca39 2747 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2748 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2749
2750 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2751 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2752 /* got probe response, continue with auth */
bdcbd8e0 2753 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2754 ifmgd->auth_data->tries = 0;
2755 ifmgd->auth_data->timeout = jiffies;
89afe614 2756 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2757 run_again(ifmgd, ifmgd->auth_data->timeout);
2758 }
f0706e82
JB		 2759}
2760
d91f36db
JB		 2761/*
2762 * This is the canonical list of information elements we care about,
2763 * the filter code also gives us all changes to the Microsoft OUI
2764 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2765 *
2766 * We implement beacon filtering in software since that means we can
2767 * avoid processing the frame here and in cfg80211, and userspace
2768 * will not be able to tell whether the hardware supports it or not.
2769 *
2770 * XXX: This list needs to be dynamic -- userspace needs to be able to
2771 * add items it requires. It also needs to be able to tell us to
2772 * look out for other vendor IEs.
2773 */
2774static const u64 care_about_ies =
1d4df3a5
JB		 2775 (1ULL << WLAN_EID_COUNTRY) |
2776 (1ULL << WLAN_EID_ERP_INFO) |
2777 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2778 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2779 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2780 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2781
30eb1dc2
JB		 2782static enum rx_mgmt_action
2783ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2784 struct ieee80211_mgmt *mgmt, size_t len,
2785 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2786{
d91f36db 2787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2788 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2789 size_t baselen;
2790 struct ieee802_11_elems elems;
f698d856 2791 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2792 struct ieee80211_chanctx_conf *chanctx_conf;
2793 struct ieee80211_channel *chan;
bee7f586 2794 struct sta_info *sta;
471b3efd 2795 u32 changed = 0;
f87ad637 2796 bool erp_valid;
7a5158ef 2797 u8 erp_value = 0;
d91f36db 2798 u32 ncrc;
77fdaa12
JB		 2799 u8 *bssid;
2800
66e67e41 2801 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2802
ae6a44e3
EK		 2803 /* Process beacon from the current BSS */
2804 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2805 if (baselen > len)
30eb1dc2 2806 return RX_MGMT_NONE;
ae6a44e3 2807
55de908a
JB		 2808 rcu_read_lock();
2809 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2810 if (!chanctx_conf) {
2811 rcu_read_unlock();
30eb1dc2 2812 return RX_MGMT_NONE;
55de908a
JB		 2813 }
2814
4bf88530 2815 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2816 rcu_read_unlock();
30eb1dc2 2817 return RX_MGMT_NONE;
55de908a 2818 }
4bf88530 2819 chan = chanctx_conf->def.chan;
55de908a 2820 rcu_read_unlock();
f0706e82 2821
c65dd147 2822 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2823 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2824 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2825 len - baselen, &elems);
77fdaa12 2826
d45c4172 2827 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2828 ifmgd->assoc_data->have_beacon = true;
c65dd147 2829 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2830 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2831 sdata->vif.bss_conf.sync_tsf =
2832 le64_to_cpu(mgmt->u.beacon.timestamp);
2833 sdata->vif.bss_conf.sync_device_ts =
2834 rx_status->device_timestamp;
2835 if (elems.tim)
2836 sdata->vif.bss_conf.sync_dtim_count =
2837 elems.tim->dtim_count;
2838 else
2839 sdata->vif.bss_conf.sync_dtim_count = 0;
2840 }
66e67e41
JB		 2841 /* continue assoc process */
2842 ifmgd->assoc_data->timeout = jiffies;
89afe614 2843 ifmgd->assoc_data->timeout_started = true;
66e67e41 2844 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2845 return RX_MGMT_NONE;
66e67e41 2846 }
77fdaa12 2847
66e67e41 2848 if (!ifmgd->associated ||
b203ca39 2849 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2850 return RX_MGMT_NONE;
66e67e41 2851 bssid = ifmgd->associated->bssid;
f0706e82 2852
17e4ec14
JM		 2853 /* Track average RSSI from the Beacon frames of the current AP */
2854 ifmgd->last_beacon_signal = rx_status->signal;
2855 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2856 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2857 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2858 ifmgd->last_cqm_event_signal = 0;
391a200a 2859 ifmgd->count_beacon_signal = 1;
615f7b9b 2860 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2861 } else {
2862 ifmgd->ave_beacon_signal =
2863 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2864 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2865 ifmgd->ave_beacon_signal) / 16;
391a200a 2866 ifmgd->count_beacon_signal++;
17e4ec14 2867 }
615f7b9b
MV		 2868
2869 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2870 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2871 int sig = ifmgd->ave_beacon_signal;
2872 int last_sig = ifmgd->last_ave_beacon_signal;
2873
2874 /*
2875 * if signal crosses either of the boundaries, invoke callback
2876 * with appropriate parameters
2877 */
2878 if (sig > ifmgd->rssi_max_thold &&
2879 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2880 ifmgd->last_ave_beacon_signal = sig;
887da917 2881 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2882 } else if (sig < ifmgd->rssi_min_thold &&
2883 (last_sig >= ifmgd->rssi_max_thold ||
2884 last_sig == 0)) {
2885 ifmgd->last_ave_beacon_signal = sig;
887da917 2886 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2887 }
2888 }
2889
17e4ec14 2890 if (bss_conf->cqm_rssi_thold &&
391a200a 2891 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2892 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2893 int sig = ifmgd->ave_beacon_signal / 16;
2894 int last_event = ifmgd->last_cqm_event_signal;
2895 int thold = bss_conf->cqm_rssi_thold;
2896 int hyst = bss_conf->cqm_rssi_hyst;
2897 if (sig < thold &&
2898 (last_event == 0 || sig < last_event - hyst)) {
2899 ifmgd->last_cqm_event_signal = sig;
2900 ieee80211_cqm_rssi_notify(
2901 &sdata->vif,
2902 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2903 GFP_KERNEL);
2904 } else if (sig > thold &&
2905 (last_event == 0 || sig > last_event + hyst)) {
2906 ifmgd->last_cqm_event_signal = sig;
2907 ieee80211_cqm_rssi_notify(
2908 &sdata->vif,
2909 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2910 GFP_KERNEL);
2911 }
2912 }
2913
b291ba11 2914 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2915 mlme_dbg_ratelimited(sdata,
112c31f0 2916 "cancelling AP probe due to a received beacon\n");
925e64c3 2917 mutex_lock(&local->mtx);
b291ba11 2918 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2919 ieee80211_run_deferred_scan(local);
2920 mutex_unlock(&local->mtx);
2921
4e751843
JB		 2922 mutex_lock(&local->iflist_mtx);
2923 ieee80211_recalc_ps(local, -1);
2924 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2925 }
2926
b291ba11
JB		 2927 /*
2928 * Push the beacon loss detection into the future since
2929 * we are processing a beacon from the AP just now.
2930 */
d3a910a8 2931 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2932
d91f36db
JB		 2933 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2934 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2935 len - baselen, &elems,
2936 care_about_ies, ncrc);
2937
25c9c875 2938 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2939 bool directed_tim = ieee80211_check_tim(elems.tim,
2940 elems.tim_len,
2941 ifmgd->aid);
1fb3606b 2942 if (directed_tim) {
572e0012 2943 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2944 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2945 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2946 ieee80211_hw_config(local,
2947 IEEE80211_CONF_CHANGE_PS);
2948 }
572e0012 2949 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2950 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2951 local->pspolling = true;
2952
2953 /*
2954 * Here is assumed that the driver will be
2955 * able to send ps-poll frame and receive a
2956 * response even though power save mode is
2957 * enabled, but some drivers might require
2958 * to disable power save here. This needs
2959 * to be investigated.
2960 */
2961 ieee80211_send_pspoll(local, sdata);
2962 }
a97b77b9
VN		 2963 }
2964 }
7a5158ef 2965
488dd7b5
JB		 2966 if (sdata->vif.p2p) {
2967 u8 noa[2];
2968 int ret;
2969
2970 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2971 len - baselen,
2972 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2973 noa, sizeof(noa));
2974 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2975 bss_conf->p2p_oppps = noa[1] & 0x80;
2976 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2977 changed |= BSS_CHANGED_P2P_PS;
2978 sdata->u.mgd.p2p_noa_index = noa[0];
2979 /*
2980 * make sure we update all information, the CRC
2981 * mechanism doesn't look at P2P attributes.
2982 */
2983 ifmgd->beacon_crc_valid = false;
2984 }
2985 }
2986
d8ec4433 2987 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2988 return RX_MGMT_NONE;
30196673 2989 ifmgd->beacon_crc = ncrc;
d8ec4433 2990 ifmgd->beacon_crc_valid = true;
30196673 2991
d45c4172 2992 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2993
2994 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2995 elems.wmm_param_len))
2996 changed |= BSS_CHANGED_QOS;
2997
c65dd147
EG		 2998 /*
2999 * If we haven't had a beacon before, tell the driver about the
ef429dad 3000 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3001 */
3002 if (!bss_conf->dtim_period) {
3003 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3004 if (elems.tim)
3005 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3006 else
3007 bss_conf->dtim_period = 1;
ef429dad
JB		 3008
3009 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3010 sdata->vif.bss_conf.sync_tsf =
3011 le64_to_cpu(mgmt->u.beacon.timestamp);
3012 sdata->vif.bss_conf.sync_device_ts =
3013 rx_status->device_timestamp;
3014 if (elems.tim)
3015 sdata->vif.bss_conf.sync_dtim_count =
3016 elems.tim->dtim_count;
3017 else
3018 sdata->vif.bss_conf.sync_dtim_count = 0;
3019 }
3020
c65dd147
EG		 3021 changed |= BSS_CHANGED_DTIM_PERIOD;
3022 }
3023
7a5158ef
JB		 3024 if (elems.erp_info && elems.erp_info_len >= 1) {
3025 erp_valid = true;
3026 erp_value = elems.erp_info[0];
3027 } else {
3028 erp_valid = false;
50c4afb9 3029 }
7a5158ef
JB		 3030 changed |= ieee80211_handle_bss_capability(sdata,
3031 le16_to_cpu(mgmt->u.beacon.capab_info),
3032 erp_valid, erp_value);
f0706e82 3033
1128958d 3034 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3035 sta = sta_info_get(sdata, bssid);
3036
30eb1dc2
JB		 3037 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3038 elems.vht_operation, bssid, &changed)) {
3039 mutex_unlock(&local->sta_mtx);
3040 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3041 WLAN_REASON_DEAUTH_LEAVING,
3042 true, deauth_buf);
3043 return RX_MGMT_CFG80211_TX_DEAUTH;
3044 }
bee7f586
JB		 3045
3046 if (sta && elems.opmode_notif)
3047 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3048 rx_status->band, true);
1128958d 3049 mutex_unlock(&local->sta_mtx);
d3c990fb 3050
04b7b2ff
JB		 3051 if (elems.country_elem && elems.pwr_constr_elem &&
3052 mgmt->u.probe_resp.capab_info &
3053 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3054 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3055 elems.country_elem,
3056 elems.country_elem_len,
3057 elems.pwr_constr_elem);
3f2355cb 3058
471b3efd 3059 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3060
3061 return RX_MGMT_NONE;
f0706e82
JB		 3062}
3063
1fa57d01
JB		 3064void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3065 struct sk_buff *skb)
f0706e82 3066{
77fdaa12 3067 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3068 struct ieee80211_rx_status *rx_status;
f0706e82 3069 struct ieee80211_mgmt *mgmt;
66e67e41 3070 struct cfg80211_bss *bss = NULL;
77fdaa12 3071 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3072 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3073 u16 fc;
3074
f0706e82
JB		 3075 rx_status = (struct ieee80211_rx_status *) skb->cb;
3076 mgmt = (struct ieee80211_mgmt *) skb->data;
3077 fc = le16_to_cpu(mgmt->frame_control);
3078
77fdaa12
JB		 3079 mutex_lock(&ifmgd->mtx);
3080
66e67e41
JB		 3081 switch (fc & IEEE80211_FCTL_STYPE) {
3082 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3083 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3084 deauth_buf, rx_status);
66e67e41
JB		 3085 break;
3086 case IEEE80211_STYPE_PROBE_RESP:
3087 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3088 break;
3089 case IEEE80211_STYPE_AUTH:
3090 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3091 break;
3092 case IEEE80211_STYPE_DEAUTH:
3093 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3094 break;
3095 case IEEE80211_STYPE_DISASSOC:
3096 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3097 break;
3098 case IEEE80211_STYPE_ASSOC_RESP:
3099 case IEEE80211_STYPE_REASSOC_RESP:
3100 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3101 break;
3102 case IEEE80211_STYPE_ACTION:
3103 switch (mgmt->u.action.category) {
3104 case WLAN_CATEGORY_SPECTRUM_MGMT:
3105 ieee80211_sta_process_chanswitch(sdata,
3106 &mgmt->u.action.u.chan_switch.sw_elem,
3107 (void *)ifmgd->associated->priv,
3108 rx_status->mactime);
77fdaa12 3109 break;
77fdaa12 3110 }
77fdaa12 3111 }
77fdaa12
JB		 3112 mutex_unlock(&ifmgd->mtx);
3113
66e67e41
JB		 3114 switch (rma) {
3115 case RX_MGMT_NONE:
3116 /* no action */
3117 break;
3118 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3119 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3120 break;
3121 case RX_MGMT_CFG80211_DISASSOC:
3122 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3123 break;
3124 case RX_MGMT_CFG80211_RX_AUTH:
3125 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3126 break;
3127 case RX_MGMT_CFG80211_RX_ASSOC:
3128 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3129 break;
3130 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3131 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3132 break;
30eb1dc2
JB		 3133 case RX_MGMT_CFG80211_TX_DEAUTH:
3134 cfg80211_send_deauth(sdata->dev, deauth_buf,
3135 sizeof(deauth_buf));
3136 break;
66e67e41
JB		 3137 default:
3138 WARN(1, "unexpected: %d", rma);
b054b747 3139 }
f0706e82
JB		 3140}
3141
9c6bd790 3142static void ieee80211_sta_timer(unsigned long data)
f0706e82 3143{
60f8b39c
JB		 3144 struct ieee80211_sub_if_data *sdata =
3145 (struct ieee80211_sub_if_data *) data;
46900298 3146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 3147 struct ieee80211_local *local = sdata->local;
f0706e82 3148
5bb644a0
JB		 3149 if (local->quiescing) {
3150 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3151 return;
3152 }
3153
64592c8f 3154 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 3155}
3156
04ac3c0e 3157static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3158 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3159{
04ac3c0e 3160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3161 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3162
37ad3888 3163 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3164 tx, frame_buf);
04ac3c0e 3165 mutex_unlock(&ifmgd->mtx);
37ad3888 3166
04ac3c0e
FF		 3167 /*
3168 * must be outside lock due to cfg80211,
3169 * but that's not a problem.
3170 */
6ae16775 3171 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3172
04ac3c0e
FF		 3173 mutex_lock(&ifmgd->mtx);
3174}
3175
66e67e41
JB		 3176static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3177{
3178 struct ieee80211_local *local = sdata->local;
3179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3180 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3181 u32 tx_flags = 0;
66e67e41
JB		 3182
3183 lockdep_assert_held(&ifmgd->mtx);
3184
3185 if (WARN_ON_ONCE(!auth_data))
3186 return -EINVAL;
3187
1672c0e3
JB		 3188 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3189 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3190 IEEE80211_TX_INTFL_MLME_CONN_TX;
3191
66e67e41
JB		 3192 auth_data->tries++;
3193
3194 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3195 sdata_info(sdata, "authentication with %pM timed out\n",
3196 auth_data->bss->bssid);
66e67e41
JB		 3197
3198 /*
3199 * Most likely AP is not in the range so remove the
3200 * bss struct for that AP.
3201 */
3202 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3203
3204 return -ETIMEDOUT;
3205 }
3206
a1845fc7
JB		 3207 drv_mgd_prepare_tx(local, sdata);
3208
66e67e41 3209 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3210 u16 trans = 1;
3211 u16 status = 0;
3212
bdcbd8e0
JB		 3213 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3214 auth_data->bss->bssid, auth_data->tries,
3215 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3216
3217 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3218
3219 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3220 trans = auth_data->sae_trans;
3221 status = auth_data->sae_status;
3222 auth_data->expected_transaction = trans;
3223 }
3224
3225 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3226 auth_data->data, auth_data->data_len,
66e67e41 3227 auth_data->bss->bssid,
1672c0e3
JB		 3228 auth_data->bss->bssid, NULL, 0, 0,
3229 tx_flags);
66e67e41
JB		 3230 } else {
3231 const u8 *ssidie;
3232
bdcbd8e0
JB		 3233 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3234 auth_data->bss->bssid, auth_data->tries,
3235 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3236
9caf0364 3237 rcu_read_lock();
66e67e41 3238 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3239 if (!ssidie) {
3240 rcu_read_unlock();
66e67e41 3241 return -EINVAL;
9caf0364 3242 }
66e67e41
JB		 3243 /*
3244 * Direct probe is sent to broadcast address as some APs
3245 * will not answer to direct packet in unassociated state.
3246 */
3247 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3248 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3249 auth_data->bss->channel, false);
9caf0364 3250 rcu_read_unlock();
66e67e41
JB		 3251 }
3252
1672c0e3
JB		 3253 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3254 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3255 ifmgd->auth_data->timeout_started = true;
1672c0e3 3256 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3257 } else {
3258 auth_data->timeout_started = false;
1672c0e3 3259 }
66e67e41
JB		 3260
3261 return 0;
3262}
3263
3264static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3265{
3266 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3267 struct ieee80211_local *local = sdata->local;
3268
3269 lockdep_assert_held(&sdata->u.mgd.mtx);
3270
66e67e41
JB		 3271 assoc_data->tries++;
3272 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3273 sdata_info(sdata, "association with %pM timed out\n",
3274 assoc_data->bss->bssid);
66e67e41
JB		 3275
3276 /*
3277 * Most likely AP is not in the range so remove the
3278 * bss struct for that AP.
3279 */
3280 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3281
3282 return -ETIMEDOUT;
3283 }
3284
bdcbd8e0
JB		 3285 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3286 assoc_data->bss->bssid, assoc_data->tries,
3287 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3288 ieee80211_send_assoc(sdata);
3289
1672c0e3
JB		 3290 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3291 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3292 assoc_data->timeout_started = true;
1672c0e3 3293 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3294 } else {
3295 assoc_data->timeout_started = false;
1672c0e3 3296 }
66e67e41
JB		 3297
3298 return 0;
3299}
3300
1672c0e3
JB		 3301void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3302 __le16 fc, bool acked)
3303{
3304 struct ieee80211_local *local = sdata->local;
3305
3306 sdata->u.mgd.status_fc = fc;
3307 sdata->u.mgd.status_acked = acked;
3308 sdata->u.mgd.status_received = true;
3309
3310 ieee80211_queue_work(&local->hw, &sdata->work);
3311}
3312
1fa57d01 3313void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3314{
9c6bd790 3315 struct ieee80211_local *local = sdata->local;
1fa57d01 3316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3317
77fdaa12
JB		 3318 mutex_lock(&ifmgd->mtx);
3319
1672c0e3
JB		 3320 if (ifmgd->status_received) {
3321 __le16 fc = ifmgd->status_fc;
3322 bool status_acked = ifmgd->status_acked;
3323
3324 ifmgd->status_received = false;
3325 if (ifmgd->auth_data &&
3326 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3327 if (status_acked) {
3328 ifmgd->auth_data->timeout =
3329 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3330 run_again(ifmgd, ifmgd->auth_data->timeout);
3331 } else {
3332 ifmgd->auth_data->timeout = jiffies - 1;
3333 }
89afe614 3334 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3335 } else if (ifmgd->assoc_data &&
3336 (ieee80211_is_assoc_req(fc) ||
3337 ieee80211_is_reassoc_req(fc))) {
3338 if (status_acked) {
3339 ifmgd->assoc_data->timeout =
3340 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3341 run_again(ifmgd, ifmgd->assoc_data->timeout);
3342 } else {
3343 ifmgd->assoc_data->timeout = jiffies - 1;
3344 }
89afe614 3345 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3346 }
3347 }
3348
89afe614 3349 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3350 time_after(jiffies, ifmgd->auth_data->timeout)) {
3351 if (ifmgd->auth_data->done) {
3352 /*
3353 * ok ... we waited for assoc but userspace didn't,
3354 * so let's just kill the auth data
3355 */
3356 ieee80211_destroy_auth_data(sdata, false);
3357 } else if (ieee80211_probe_auth(sdata)) {
3358 u8 bssid[ETH_ALEN];
3359
3360 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3361
3362 ieee80211_destroy_auth_data(sdata, false);
3363
3364 mutex_unlock(&ifmgd->mtx);
3365 cfg80211_send_auth_timeout(sdata->dev, bssid);
3366 mutex_lock(&ifmgd->mtx);
3367 }
89afe614 3368 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3369 run_again(ifmgd, ifmgd->auth_data->timeout);
3370
89afe614 3371 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3372 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3373 if ((ifmgd->assoc_data->need_beacon &&
3374 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3375 ieee80211_do_assoc(sdata)) {
3376 u8 bssid[ETH_ALEN];
3377
3378 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3379
3380 ieee80211_destroy_assoc_data(sdata, false);
3381
3382 mutex_unlock(&ifmgd->mtx);
3383 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3384 mutex_lock(&ifmgd->mtx);
3385 }
89afe614 3386 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3387 run_again(ifmgd, ifmgd->assoc_data->timeout);
3388
b291ba11
JB		 3389 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3390 IEEE80211_STA_CONNECTION_POLL) &&
3391 ifmgd->associated) {
a43abf29 3392 u8 bssid[ETH_ALEN];
72a8a3ed 3393 int max_tries;
a43abf29 3394
0c1ad2ca 3395 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3396
72a8a3ed 3397 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3398 max_tries = max_nullfunc_tries;
72a8a3ed 3399 else
180205bd 3400 max_tries = max_probe_tries;
72a8a3ed 3401
4e5ff376
FF		 3402 /* ACK received for nullfunc probing frame */
3403 if (!ifmgd->probe_send_count)
3404 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3405 else if (ifmgd->nullfunc_failed) {
3406 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3407 mlme_dbg(sdata,
3408 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3409 bssid, ifmgd->probe_send_count,
3410 max_tries);
04ac3c0e
FF		 3411 ieee80211_mgd_probe_ap_send(sdata);
3412 } else {
bdcbd8e0
JB		 3413 mlme_dbg(sdata,
3414 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3415 bssid);
95acac61 3416 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3417 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3418 false);
04ac3c0e
FF		 3419 }
3420 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3421 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3422 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3423 mlme_dbg(sdata,
3424 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3425 bssid, probe_wait_ms);
95acac61 3426 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3428 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3429 mlme_dbg(sdata,
3430 "No probe response from AP %pM after %dms, try %d/%i\n",
3431 bssid, probe_wait_ms,
3432 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3433 ieee80211_mgd_probe_ap_send(sdata);
3434 } else {
b291ba11
JB		 3435 /*
3436 * We actually lost the connection ... or did we?
3437 * Let's make sure!
3438 */
b38afa87
BG		 3439 wiphy_debug(local->hw.wiphy,
3440 "%s: No probe response from AP %pM"
3441 " after %dms, disconnecting.\n",
3442 sdata->name,
180205bd 3443 bssid, probe_wait_ms);
04ac3c0e 3444
95acac61 3445 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3446 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3447 }
3448 }
3449
77fdaa12 3450 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3451}
3452
b291ba11
JB		 3453static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3454{
3455 struct ieee80211_sub_if_data *sdata =
3456 (struct ieee80211_sub_if_data *) data;
3457 struct ieee80211_local *local = sdata->local;
3458
3459 if (local->quiescing)
3460 return;
3461
682bd38b 3462 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3463 ieee80211_queue_work(&sdata->local->hw,
3464 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3465}
3466
3467static void ieee80211_sta_conn_mon_timer(unsigned long data)
3468{
3469 struct ieee80211_sub_if_data *sdata =
3470 (struct ieee80211_sub_if_data *) data;
3471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3472 struct ieee80211_local *local = sdata->local;
3473
3474 if (local->quiescing)
3475 return;
3476
42935eca 3477 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3478}
3479
3480static void ieee80211_sta_monitor_work(struct work_struct *work)
3481{
3482 struct ieee80211_sub_if_data *sdata =
3483 container_of(work, struct ieee80211_sub_if_data,
3484 u.mgd.monitor_work);
3485
3486 ieee80211_mgd_probe_ap(sdata, false);
3487}
3488
9c6bd790
JB		 3489static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3490{
494f1fe5
EP		 3491 u32 flags;
3492
ad935687 3493 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3494 __ieee80211_stop_poll(sdata);
ad935687 3495
b291ba11 3496 /* let's probe the connection once */
494f1fe5
EP		 3497 flags = sdata->local->hw.flags;
3498 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3499 ieee80211_queue_work(&sdata->local->hw,
3500 &sdata->u.mgd.monitor_work);
b291ba11 3501 /* and do all the other regular work too */
64592c8f 3502 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3503 }
9c6bd790 3504}
f0706e82 3505
5bb644a0
JB		 3506#ifdef CONFIG_PM
3507void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3508{
3509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3510
9b5bd5a4
BG		 3511 /*
3512 * Stop timers before deleting work items, as timers
3513 * could race and re-add the work-items. They will be
3514 * re-established on connection.
3515 */
3516 del_timer_sync(&ifmgd->conn_mon_timer);
3517 del_timer_sync(&ifmgd->bcn_mon_timer);
3518
5bb644a0
JB		 3519 /*
3520 * we need to use atomic bitops for the running bits
3521 * only because both timers might fire at the same
3522 * time -- the code here is properly synchronised.
3523 */
3524
d1f5b7a3
JB		 3525 cancel_work_sync(&ifmgd->request_smps_work);
3526
0ecfe806 3527 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3528 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3529 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3530 if (del_timer_sync(&ifmgd->timer))
3531 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3532
5bb644a0
JB		 3533 if (del_timer_sync(&ifmgd->chswitch_timer))
3534 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
9b5bd5a4 3535 cancel_work_sync(&ifmgd->chswitch_work);
5bb644a0
JB		 3536}
3537
3538void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3539{
3540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3541
782d2673
JB		 3542 mutex_lock(&ifmgd->mtx);
3543 if (!ifmgd->associated) {
3544 mutex_unlock(&ifmgd->mtx);
676b58c2 3545 return;
782d2673 3546 }
676b58c2 3547
95acac61
JB		 3548 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3549 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3550 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3551 ieee80211_sta_connection_lost(sdata,
3552 ifmgd->associated->bssid,
6b684db1
JB		 3553 WLAN_REASON_UNSPECIFIED,
3554 true);
95acac61 3555 mutex_unlock(&ifmgd->mtx);
782d2673 3556 return;
95acac61 3557 }
782d2673 3558 mutex_unlock(&ifmgd->mtx);
95acac61 3559
5bb644a0
JB		 3560 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3561 add_timer(&ifmgd->timer);
3562 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3563 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3564 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3565
3566 mutex_lock(&sdata->local->mtx);
46090979 3567 ieee80211_restart_sta_timer(sdata);
925e64c3 3568 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3569}
3570#endif
3571
9c6bd790
JB		 3572/* interface setup */
3573void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3574{
46900298 3575 struct ieee80211_if_managed *ifmgd;
988c0f72 3576
46900298 3577 ifmgd = &sdata->u.mgd;
b291ba11 3578 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3579 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3580 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3581 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3582 INIT_WORK(&ifmgd->csa_connection_drop_work,
3583 ieee80211_csa_connection_drop_work);
d1f5b7a3 3584 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3585 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3586 (unsigned long) sdata);
b291ba11
JB		 3587 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3588 (unsigned long) sdata);
3589 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3590 (unsigned long) sdata);
46900298 3591 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3592 (unsigned long) sdata);
9c6bd790 3593
ab1faead 3594 ifmgd->flags = 0;
1478acb3 3595 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3596 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3597 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3598
77fdaa12 3599 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3600
3601 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3602 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3603 else
3604 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3605}
3606
77fdaa12
JB		 3607/* scan finished notification */
3608void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3609{
31ee67a1 3610 struct ieee80211_sub_if_data *sdata;
60f8b39c 3611
77fdaa12
JB		 3612 /* Restart STA timers */
3613 rcu_read_lock();
3614 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3615 ieee80211_restart_sta_timer(sdata);
3616 rcu_read_unlock();
3617}
60f8b39c 3618
77fdaa12
JB		 3619int ieee80211_max_network_latency(struct notifier_block *nb,
3620 unsigned long data, void *dummy)
3621{
3622 s32 latency_usec = (s32) data;
3623 struct ieee80211_local *local =
3624 container_of(nb, struct ieee80211_local,
3625 network_latency_notifier);
1fa6f4af 3626
77fdaa12
JB		 3627 mutex_lock(&local->iflist_mtx);
3628 ieee80211_recalc_ps(local, latency_usec);
3629 mutex_unlock(&local->iflist_mtx);
dfe67012 3630
77fdaa12 3631 return 0;
9c6bd790
JB		 3632}
3633
f2d9d270
JB		 3634static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3635 struct cfg80211_bss *cbss)
3636{
3637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3638 const u8 *ht_cap_ie, *vht_cap_ie;
3639 const struct ieee80211_ht_cap *ht_cap;
3640 const struct ieee80211_vht_cap *vht_cap;
3641 u8 chains = 1;
3642
3643 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3644 return chains;
3645
9caf0364 3646 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3647 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3648 ht_cap = (void *)(ht_cap_ie + 2);
3649 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3650 /*
3651 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3652 * "Tx Unequal Modulation Supported" fields.
3653 */
3654 }
3655
3656 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3657 return chains;
3658
9caf0364 3659 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3660 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3661 u8 nss;
3662 u16 tx_mcs_map;
3663
3664 vht_cap = (void *)(vht_cap_ie + 2);
3665 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3666 for (nss = 8; nss > 0; nss--) {
3667 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3668 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3669 break;
3670 }
3671 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3672 chains = max(chains, nss);
3673 }
3674
3675 return chains;
3676}
3677
b17166a7
JB		 3678static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3679 struct cfg80211_bss *cbss)
a1cf775d
JB		 3680{
3681 struct ieee80211_local *local = sdata->local;
3682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3683 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3684 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3685 struct ieee80211_supported_band *sband;
4bf88530 3686 struct cfg80211_chan_def chandef;
f2d9d270 3687 int ret;
a1cf775d 3688
24398e39
JB		 3689 sband = local->hw.wiphy->bands[cbss->channel->band];
3690
f2d9d270
JB		 3691 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3692 IEEE80211_STA_DISABLE_80P80MHZ |
3693 IEEE80211_STA_DISABLE_160MHZ);
3694
9caf0364
JB		 3695 rcu_read_lock();
3696
f2d9d270
JB		 3697 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3698 sband->ht_cap.ht_supported) {
08e6effa 3699 const u8 *ht_oper_ie, *ht_cap;
24398e39 3700
9caf0364 3701 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3702 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3703 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3704
3705 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3706 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3707 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3708 ht_oper = NULL;
3709 }
24398e39
JB		 3710 }
3711
f2d9d270
JB		 3712 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3713 sband->vht_cap.vht_supported) {
08e6effa 3714 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3715
9caf0364
JB		 3716 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3717 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3718 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3719 vht_oper = (void *)(vht_oper_ie + 2);
3720 if (vht_oper && !ht_oper) {
3721 vht_oper = NULL;
bdcbd8e0 3722 sdata_info(sdata,
f2d9d270 3723 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3725 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3726 }
08e6effa
JB		 3727
3728 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3729 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3730 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3731 vht_oper = NULL;
3732 }
24398e39
JB		 3733 }
3734
f2d9d270
JB		 3735 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3736 cbss->channel,
3737 ht_oper, vht_oper,
30eb1dc2 3738 &chandef, true);
04ecd257 3739
f2d9d270
JB		 3740 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3741 local->rx_chains);
24398e39 3742
9caf0364
JB		 3743 rcu_read_unlock();
3744
04ecd257
JB		 3745 /* will change later if needed */
3746 sdata->smps_mode = IEEE80211_SMPS_OFF;
3747
f2d9d270
JB		 3748 /*
3749 * If this fails (possibly due to channel context sharing
3750 * on incompatible channels, e.g. 80+80 and 160 sharing the
3751 * same control channel) try to use a smaller bandwidth.
3752 */
3753 ret = ieee80211_vif_use_channel(sdata, &chandef,
3754 IEEE80211_CHANCTX_SHARED);
d601cd8d 3755 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3756 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3757 ret = ieee80211_vif_use_channel(sdata, &chandef,
3758 IEEE80211_CHANCTX_SHARED);
3759 }
f2d9d270 3760 return ret;
b17166a7
JB		 3761}
3762
3763static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3764 struct cfg80211_bss *cbss, bool assoc)
3765{
3766 struct ieee80211_local *local = sdata->local;
3767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3768 struct ieee80211_bss *bss = (void *)cbss->priv;
3769 struct sta_info *new_sta = NULL;
3770 bool have_sta = false;
3771 int err;
3772
3773 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3774 return -EINVAL;
3775
3776 if (assoc) {
3777 rcu_read_lock();
3778 have_sta = sta_info_get(sdata, cbss->bssid);
3779 rcu_read_unlock();
3780 }
3781
3782 if (!have_sta) {
3783 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3784 if (!new_sta)
3785 return -ENOMEM;
3786 }
3787
13e0c8e3 3788 if (new_sta) {
5d6a1b06
JB		 3789 u32 rates = 0, basic_rates = 0;
3790 bool have_higher_than_11mbit;
3791 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3792 struct ieee80211_supported_band *sband;
8cef2c9d 3793 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3794
3795 sband = local->hw.wiphy->bands[cbss->channel->band];
3796
3797 err = ieee80211_prep_channel(sdata, cbss);
3798 if (err) {
3799 sta_info_free(local, new_sta);
3800 return err;
3801 }
5d6a1b06 3802
5d6a1b06
JB		 3803 ieee80211_get_rates(sband, bss->supp_rates,
3804 bss->supp_rates_len,
3805 &rates, &basic_rates,
3806 &have_higher_than_11mbit,
3807 &min_rate, &min_rate_index);
3808
3809 /*
3810 * This used to be a workaround for basic rates missing
3811 * in the association response frame. Now that we no
3812 * longer use the basic rates from there, it probably
3813 * doesn't happen any more, but keep the workaround so
3814 * in case some *other* APs are buggy in different ways
3815 * we can connect -- with a warning.
3816 */
3817 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3818 sdata_info(sdata,
3819 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3820 basic_rates = BIT(min_rate_index);
3821 }
3822
13e0c8e3 3823 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3824 sdata->vif.bss_conf.basic_rates = basic_rates;
3825
3826 /* cf. IEEE 802.11 9.2.12 */
55de908a 3827 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3828 have_higher_than_11mbit)
3829 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3830 else
3831 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3832
3833 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3834
8c358bcd
JB		 3835 /* set timing information */
3836 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3837 rcu_read_lock();
ef429dad
JB		 3838 ies = rcu_dereference(cbss->beacon_ies);
3839 if (ies) {
3840 const u8 *tim_ie;
3841
3842 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3843 sdata->vif.bss_conf.sync_device_ts =
3844 bss->device_ts_beacon;
3845 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3846 ies->data, ies->len);
3847 if (tim_ie && tim_ie[1] >= 2)
3848 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3849 else
3850 sdata->vif.bss_conf.sync_dtim_count = 0;
3851 } else if (!(local->hw.flags &
3852 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3853 ies = rcu_dereference(cbss->proberesp_ies);
3854 /* must be non-NULL since beacon IEs were NULL */
3855 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3856 sdata->vif.bss_conf.sync_device_ts =
3857 bss->device_ts_presp;
3858 sdata->vif.bss_conf.sync_dtim_count = 0;
3859 } else {
3860 sdata->vif.bss_conf.sync_tsf = 0;
3861 sdata->vif.bss_conf.sync_device_ts = 0;
3862 sdata->vif.bss_conf.sync_dtim_count = 0;
3863 }
8cef2c9d 3864 rcu_read_unlock();
8c358bcd
JB		 3865
3866 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3867 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3868 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3869 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3870
3871 if (assoc)
13e0c8e3 3872 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3873
13e0c8e3
JB		 3874 err = sta_info_insert(new_sta);
3875 new_sta = NULL;
a1cf775d 3876 if (err) {
bdcbd8e0
JB		 3877 sdata_info(sdata,
3878 "failed to insert STA entry for the AP (error %d)\n",
3879 err);
a1cf775d
JB		 3880 return err;
3881 }
3882 } else
b203ca39 3883 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3884
3885 return 0;
3886}
3887
77fdaa12
JB		 3888/* config hooks */
3889int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3890 struct cfg80211_auth_request *req)
9c6bd790 3891{
66e67e41
JB		 3892 struct ieee80211_local *local = sdata->local;
3893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3894 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3895 u16 auth_alg;
66e67e41
JB		 3896 int err;
3897
3898 /* prepare auth data structure */
9c6bd790 3899
77fdaa12
JB		 3900 switch (req->auth_type) {
3901 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3902 auth_alg = WLAN_AUTH_OPEN;
3903 break;
3904 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3905 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3906 return -EOPNOTSUPP;
77fdaa12
JB		 3907 auth_alg = WLAN_AUTH_SHARED_KEY;
3908 break;
3909 case NL80211_AUTHTYPE_FT:
3910 auth_alg = WLAN_AUTH_FT;
3911 break;
3912 case NL80211_AUTHTYPE_NETWORK_EAP:
3913 auth_alg = WLAN_AUTH_LEAP;
3914 break;
6b8ece3a
JM		 3915 case NL80211_AUTHTYPE_SAE:
3916 auth_alg = WLAN_AUTH_SAE;
3917 break;
77fdaa12
JB		 3918 default:
3919 return -EOPNOTSUPP;
60f8b39c 3920 }
77fdaa12 3921
6b8ece3a
JM		 3922 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3923 req->ie_len, GFP_KERNEL);
66e67e41 3924 if (!auth_data)
9c6bd790 3925 return -ENOMEM;
77fdaa12 3926
66e67e41 3927 auth_data->bss = req->bss;
77fdaa12 3928
6b8ece3a
JM		 3929 if (req->sae_data_len >= 4) {
3930 __le16 *pos = (__le16 *) req->sae_data;
3931 auth_data->sae_trans = le16_to_cpu(pos[0]);
3932 auth_data->sae_status = le16_to_cpu(pos[1]);
3933 memcpy(auth_data->data, req->sae_data + 4,
3934 req->sae_data_len - 4);
3935 auth_data->data_len += req->sae_data_len - 4;
3936 }
3937
77fdaa12 3938 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3939 memcpy(&auth_data->data[auth_data->data_len],
3940 req->ie, req->ie_len);
3941 auth_data->data_len += req->ie_len;
9c6bd790 3942 }
77fdaa12 3943
fffd0934 3944 if (req->key && req->key_len) {
66e67e41
JB		 3945 auth_data->key_len = req->key_len;
3946 auth_data->key_idx = req->key_idx;
3947 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3948 }
3949
66e67e41 3950 auth_data->algorithm = auth_alg;
60f8b39c 3951
66e67e41 3952 /* try to authenticate/probe */
2a33bee2 3953
66e67e41 3954 mutex_lock(&ifmgd->mtx);
2a33bee2 3955
66e67e41
JB		 3956 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3957 ifmgd->assoc_data) {
3958 err = -EBUSY;
3959 goto err_free;
2a33bee2
GE		 3960 }
3961
66e67e41
JB		 3962 if (ifmgd->auth_data)
3963 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3964
66e67e41
JB		 3965 /* prep auth_data so we don't go into idle on disassoc */
3966 ifmgd->auth_data = auth_data;
af6b6374 3967
66e67e41 3968 if (ifmgd->associated)
37ad3888 3969 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3970
bdcbd8e0 3971 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3972
a1cf775d
JB		 3973 err = ieee80211_prep_connection(sdata, req->bss, false);
3974 if (err)
66e67e41 3975 goto err_clear;
af6b6374 3976
66e67e41
JB		 3977 err = ieee80211_probe_auth(sdata);
3978 if (err) {
66e67e41
JB		 3979 sta_info_destroy_addr(sdata, req->bss->bssid);
3980 goto err_clear;
3981 }
3982
3983 /* hold our own reference */
5b112d3d 3984 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3985 err = 0;
3986 goto out_unlock;
3987
3988 err_clear:
3d2abdfd
EP		 3989 memset(ifmgd->bssid, 0, ETH_ALEN);
3990 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3991 ifmgd->auth_data = NULL;
3992 err_free:
3993 kfree(auth_data);
3994 out_unlock:
3995 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3996
66e67e41 3997 return err;
af6b6374
JB		 3998}
3999
77fdaa12
JB		 4000int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4001 struct cfg80211_assoc_request *req)
f0706e82 4002{
66e67e41 4003 struct ieee80211_local *local = sdata->local;
77fdaa12 4004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4005 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4006 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4007 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4008 struct ieee80211_supported_band *sband;
b08fbbd8 4009 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4010 int i, err;
f0706e82 4011
66e67e41
JB		 4012 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4013 if (!assoc_data)
4014 return -ENOMEM;
4015
9caf0364
JB		 4016 rcu_read_lock();
4017 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4018 if (!ssidie) {
4019 rcu_read_unlock();
4020 kfree(assoc_data);
4021 return -EINVAL;
4022 }
4023 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4024 assoc_data->ssid_len = ssidie[1];
4025 rcu_read_unlock();
4026
77fdaa12 4027 mutex_lock(&ifmgd->mtx);
9c87ba67 4028
66e67e41 4029 if (ifmgd->associated)
37ad3888 4030 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 4031
4032 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4033 err = -EBUSY;
4034 goto err_free;
af6b6374 4035 }
77fdaa12 4036
66e67e41
JB		 4037 if (ifmgd->assoc_data) {
4038 err = -EBUSY;
4039 goto err_free;
4040 }
77fdaa12 4041
66e67e41
JB		 4042 if (ifmgd->auth_data) {
4043 bool match;
4044
4045 /* keep sta info, bssid if matching */
b203ca39 4046 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4047 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4048 }
4049
66e67e41 4050 /* prepare assoc data */
19c3b830 4051
d8ec4433
JO		 4052 ifmgd->beacon_crc_valid = false;
4053
de5036aa
JB		 4054 /*
4055 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4056 * We still associate in non-HT mode (11a/b/g) if any one of these
4057 * ciphers is configured as pairwise.
4058 * We can set this to true for non-11n hardware, that'll be checked
4059 * separately along with the peer capabilities.
4060 */
1c4cb928 4061 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4062 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4063 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4064 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4065 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4066 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4067 netdev_info(sdata->dev,
d545daba 4068 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4069 }
4070 }
77fdaa12 4071
d545daba 4072 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4073 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4074 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4075 }
ef96a842 4076
dd5ecfea
JB		 4077 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4078 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4079
4e74bfdb
JB		 4080 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4081 sband = local->hw.wiphy->bands[req->bss->channel->band];
4082 if (!sband->ht_cap.ht_supported ||
1c4cb928 4083 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4084 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4085 if (!bss->wmm_used)
4086 netdev_info(sdata->dev,
4087 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4088 }
4e74bfdb 4089
d545daba
MP		 4090 /* disable VHT if we don't support it or the AP doesn't use WMM */
4091 if (!sband->vht_cap.vht_supported ||
4092 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4093 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4094 if (!bss->wmm_used)
4095 netdev_info(sdata->dev,
4096 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4097 }
4098
ef96a842
BG		 4099 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4100 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4101 sizeof(ifmgd->ht_capa_mask));
4102
dd5ecfea
JB		 4103 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4104 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4105 sizeof(ifmgd->vht_capa_mask));
4106
77fdaa12 4107 if (req->ie && req->ie_len) {
66e67e41
JB		 4108 memcpy(assoc_data->ie, req->ie, req->ie_len);
4109 assoc_data->ie_len = req->ie_len;
4110 }
f679f65d 4111
66e67e41 4112 assoc_data->bss = req->bss;
f679f65d 4113
af6b6374
JB		 4114 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4115 if (ifmgd->powersave)
04ecd257 4116 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4117 else
04ecd257 4118 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4119 } else
04ecd257 4120 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4121
66e67e41 4122 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4123 assoc_data->wmm = bss->wmm_used &&
4124 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4125 assoc_data->supp_rates = bss->supp_rates;
4126 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4127
9caf0364 4128 rcu_read_lock();
9dde6423
JB		 4129 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4130 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4131 assoc_data->ap_ht_param =
4132 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4133 else
a8243b72 4134 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4135 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4136 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4137 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4138 sizeof(struct ieee80211_vht_cap));
4139 else
4140 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4141 rcu_read_unlock();
63f170e0 4142
ab13315a
KV		 4143 if (bss->wmm_used && bss->uapsd_supported &&
4144 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4145 assoc_data->uapsd = true;
ab13315a
KV		 4146 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4147 } else {
76f0303d 4148 assoc_data->uapsd = false;
ab13315a
KV		 4149 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4150 }
4151
77fdaa12 4152 if (req->prev_bssid)
66e67e41 4153 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4154
4155 if (req->use_mfp) {
4156 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4157 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4158 } else {
4159 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4160 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4161 }
4162
4163 if (req->crypto.control_port)
4164 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4165 else
4166 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4167
a621fa4d
JB		 4168 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4169 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4170
66e67e41
JB		 4171 /* kick off associate process */
4172
4173 ifmgd->assoc_data = assoc_data;
826262c3 4174 ifmgd->dtim_period = 0;
66e67e41 4175
a1cf775d
JB		 4176 err = ieee80211_prep_connection(sdata, req->bss, true);
4177 if (err)
4178 goto err_clear;
66e67e41 4179
c65dd147
EG		 4180 rcu_read_lock();
4181 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4182
c65dd147
EG		 4183 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4184 !beacon_ies) {
4185 /*
4186 * Wait up to one beacon interval ...
4187 * should this be more if we miss one?
4188 */
4189 sdata_info(sdata, "waiting for beacon from %pM\n",
4190 ifmgd->bssid);
4191 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4192 assoc_data->timeout_started = true;
c65dd147
EG		 4193 assoc_data->need_beacon = true;
4194 } else if (beacon_ies) {
4195 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4196 beacon_ies->data,
4197 beacon_ies->len);
ef429dad
JB		 4198 u8 dtim_count = 0;
4199
c65dd147
EG		 4200 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4201 const struct ieee80211_tim_ie *tim;
4202 tim = (void *)(tim_ie + 2);
4203 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4204 dtim_count = tim->dtim_count;
826262c3 4205 }
66e67e41 4206 assoc_data->have_beacon = true;
66e67e41 4207 assoc_data->timeout = jiffies;
89afe614 4208 assoc_data->timeout_started = true;
ef429dad
JB		 4209
4210 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4211 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4212 sdata->vif.bss_conf.sync_device_ts =
4213 bss->device_ts_beacon;
4214 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4215 }
c65dd147
EG		 4216 } else {
4217 assoc_data->timeout = jiffies;
89afe614 4218 assoc_data->timeout_started = true;
66e67e41 4219 }
c65dd147
EG		 4220 rcu_read_unlock();
4221
66e67e41
JB		 4222 run_again(ifmgd, assoc_data->timeout);
4223
fcff4f10
PS		 4224 if (bss->corrupt_data) {
4225 char *corrupt_type = "data";
4226 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4227 if (bss->corrupt_data &
4228 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4229 corrupt_type = "beacon and probe response";
4230 else
4231 corrupt_type = "beacon";
4232 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4233 corrupt_type = "probe response";
bdcbd8e0
JB		 4234 sdata_info(sdata, "associating with AP with corrupt %s\n",
4235 corrupt_type);
fcff4f10
PS		 4236 }
4237
66e67e41
JB		 4238 err = 0;
4239 goto out;
4240 err_clear:
3d2abdfd
EP		 4241 memset(ifmgd->bssid, 0, ETH_ALEN);
4242 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4243 ifmgd->assoc_data = NULL;
4244 err_free:
4245 kfree(assoc_data);
4246 out:
4247 mutex_unlock(&ifmgd->mtx);
4248
4249 return err;
f0706e82
JB		 4250}
4251
77fdaa12 4252int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4253 struct cfg80211_deauth_request *req)
f0706e82 4254{
46900298 4255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4256 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4257 bool tx = !req->local_state_change;
86552017 4258 bool sent_frame = false;
f0706e82 4259
77fdaa12
JB		 4260 mutex_lock(&ifmgd->mtx);
4261
bdcbd8e0
JB		 4262 sdata_info(sdata,
4263 "deauthenticating from %pM by local choice (reason=%d)\n",
4264 req->bssid, req->reason_code);
0ff71613 4265
86552017 4266 if (ifmgd->auth_data) {
8c7d857c 4267 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4268 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4269 IEEE80211_STYPE_DEAUTH,
6863255b 4270 req->reason_code, tx,
37ad3888 4271 frame_buf);
86552017
JB		 4272 ieee80211_destroy_auth_data(sdata, false);
4273 mutex_unlock(&ifmgd->mtx);
4274
4275 sent_frame = tx;
4276 goto out;
8c7d857c
EG		 4277 }
4278
86552017
JB		 4279 if (ifmgd->associated &&
4280 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4281 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4282 req->reason_code, tx, frame_buf);
4283 sent_frame = tx;
4284 }
37ad3888
JB		 4285 mutex_unlock(&ifmgd->mtx);
4286
86552017 4287 out:
86552017
JB		 4288 if (sent_frame)
4289 __cfg80211_send_deauth(sdata->dev, frame_buf,
4290 IEEE80211_DEAUTH_FRAME_LEN);
4291
f0706e82
JB		 4292 return 0;
4293}
84363e6e 4294
77fdaa12 4295int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4296 struct cfg80211_disassoc_request *req)
9c6bd790 4297{
77fdaa12 4298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4299 u8 bssid[ETH_ALEN];
6ae16775 4300 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4301
77fdaa12 4302 mutex_lock(&ifmgd->mtx);
10f644a4 4303
8d8b261a
JB		 4304 /*
4305 * cfg80211 should catch this ... but it's racy since
4306 * we can receive a disassoc frame, process it, hand it
4307 * to cfg80211 while that's in a locked section already
4308 * trying to tell us that the user wants to disconnect.
4309 */
0c1ad2ca 4310 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4311 mutex_unlock(&ifmgd->mtx);
4312 return -ENOLINK;
4313 }
4314
bdcbd8e0
JB		 4315 sdata_info(sdata,
4316 "disassociating from %pM by local choice (reason=%d)\n",
4317 req->bss->bssid, req->reason_code);
0ff71613 4318
e69e95db 4319 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4320 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4321 req->reason_code, !req->local_state_change,
4322 frame_buf);
77fdaa12 4323 mutex_unlock(&ifmgd->mtx);
10f644a4 4324
6ae16775
AQ		 4325 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4326 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4327
10f644a4
JB		 4328 return 0;
4329}
026331c4 4330
afa762f6 4331void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4332{
4333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4334
49921859
BG		 4335 /*
4336 * Make sure some work items will not run after this,
4337 * they will not do anything but might not have been
4338 * cancelled when disconnecting.
4339 */
4340 cancel_work_sync(&ifmgd->monitor_work);
4341 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4342 cancel_work_sync(&ifmgd->request_smps_work);
4343 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4344 cancel_work_sync(&ifmgd->chswitch_work);
4345
54e4ffb2
JB		 4346 mutex_lock(&ifmgd->mtx);
4347 if (ifmgd->assoc_data)
4348 ieee80211_destroy_assoc_data(sdata, false);
4349 if (ifmgd->auth_data)
4350 ieee80211_destroy_auth_data(sdata, false);
4351 del_timer_sync(&ifmgd->timer);
4352 mutex_unlock(&ifmgd->mtx);
4353}
4354
a97c13c3
JO		 4355void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4356 enum nl80211_cqm_rssi_threshold_event rssi_event,
4357 gfp_t gfp)
4358{
4359 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4360
b5878a2d
JB		 4361 trace_api_cqm_rssi_notify(sdata, rssi_event);
4362
a97c13c3
JO		 4363 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4364}
4365EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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