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mac80211: return the RSSI in dBm
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
77fdaa12
JB		 90/*
91 * All cfg80211 functions have to be called outside a locked
92 * section so that they can acquire a lock themselves... This
93 * is much simpler than queuing up things in cfg80211, but we
94 * do need some indirection for that here.
95 */
96enum rx_mgmt_action {
97 /* no action required */
98 RX_MGMT_NONE,
99
77fdaa12
JB		 100 /* caller must call cfg80211_send_deauth() */
101 RX_MGMT_CFG80211_DEAUTH,
102
103 /* caller must call cfg80211_send_disassoc() */
104 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 105
106 /* caller must call cfg80211_send_rx_auth() */
107 RX_MGMT_CFG80211_RX_AUTH,
108
109 /* caller must call cfg80211_send_rx_assoc() */
110 RX_MGMT_CFG80211_RX_ASSOC,
111
112 /* caller must call cfg80211_send_assoc_timeout() */
113 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 114
115 /* used when a processed beacon causes a deauth */
116 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
6565ec9b
JB		 177static u32 chandef_downgrade(struct cfg80211_chan_def *c)
178{
179 u32 ret;
180 int tmp;
181
182 switch (c->width) {
183 case NL80211_CHAN_WIDTH_20:
184 c->width = NL80211_CHAN_WIDTH_20_NOHT;
185 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
186 break;
187 case NL80211_CHAN_WIDTH_40:
188 c->width = NL80211_CHAN_WIDTH_20;
189 c->center_freq1 = c->chan->center_freq;
190 ret = IEEE80211_STA_DISABLE_40MHZ |
191 IEEE80211_STA_DISABLE_VHT;
192 break;
193 case NL80211_CHAN_WIDTH_80:
194 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
195 /* n_P40 */
196 tmp /= 2;
197 /* freq_P40 */
198 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
199 c->width = NL80211_CHAN_WIDTH_40;
200 ret = IEEE80211_STA_DISABLE_VHT;
201 break;
202 case NL80211_CHAN_WIDTH_80P80:
203 c->center_freq2 = 0;
204 c->width = NL80211_CHAN_WIDTH_80;
205 ret = IEEE80211_STA_DISABLE_80P80MHZ |
206 IEEE80211_STA_DISABLE_160MHZ;
207 break;
208 case NL80211_CHAN_WIDTH_160:
209 /* n_P20 */
210 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
211 /* n_P80 */
212 tmp /= 4;
213 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
214 c->width = NL80211_CHAN_WIDTH_80;
215 ret = IEEE80211_STA_DISABLE_80P80MHZ |
216 IEEE80211_STA_DISABLE_160MHZ;
217 break;
218 default:
219 case NL80211_CHAN_WIDTH_20_NOHT:
220 WARN_ON_ONCE(1);
221 c->width = NL80211_CHAN_WIDTH_20_NOHT;
222 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
223 break;
224 }
225
226 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
227
228 return ret;
229}
230
231static u32
232ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
233 struct ieee80211_supported_band *sband,
234 struct ieee80211_channel *channel,
235 const struct ieee80211_ht_operation *ht_oper,
236 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 237 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 238{
239 struct cfg80211_chan_def vht_chandef;
240 u32 ht_cfreq, ret;
241
242 chandef->chan = channel;
243 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
244 chandef->center_freq1 = channel->center_freq;
245 chandef->center_freq2 = 0;
246
247 if (!ht_oper || !sband->ht_cap.ht_supported) {
248 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
249 goto out;
250 }
251
252 chandef->width = NL80211_CHAN_WIDTH_20;
253
254 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
255 channel->band);
256 /* check that channel matches the right operating channel */
257 if (channel->center_freq != ht_cfreq) {
258 /*
259 * It's possible that some APs are confused here;
260 * Netgear WNDR3700 sometimes reports 4 higher than
261 * the actual channel in association responses, but
262 * since we look at probe response/beacon data here
263 * it should be OK.
264 */
30eb1dc2
JB		 265 if (verbose)
266 sdata_info(sdata,
267 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
268 channel->center_freq, ht_cfreq,
269 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 270 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
271 goto out;
272 }
273
274 /* check 40 MHz support, if we have it */
275 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
276 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
277 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
278 chandef->width = NL80211_CHAN_WIDTH_40;
279 chandef->center_freq1 += 10;
280 break;
281 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
282 chandef->width = NL80211_CHAN_WIDTH_40;
283 chandef->center_freq1 -= 10;
284 break;
285 }
286 } else {
287 /* 40 MHz (and 80 MHz) must be supported for VHT */
288 ret = IEEE80211_STA_DISABLE_VHT;
289 goto out;
290 }
291
292 if (!vht_oper || !sband->vht_cap.vht_supported) {
293 ret = IEEE80211_STA_DISABLE_VHT;
294 goto out;
295 }
296
297 vht_chandef.chan = channel;
298 vht_chandef.center_freq1 =
299 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
300 channel->band);
301 vht_chandef.center_freq2 = 0;
302
303 if (vht_oper->center_freq_seg2_idx)
304 vht_chandef.center_freq2 =
305 ieee80211_channel_to_frequency(
306 vht_oper->center_freq_seg2_idx,
307 channel->band);
308
309 switch (vht_oper->chan_width) {
310 case IEEE80211_VHT_CHANWIDTH_USE_HT:
311 vht_chandef.width = chandef->width;
312 break;
313 case IEEE80211_VHT_CHANWIDTH_80MHZ:
314 vht_chandef.width = NL80211_CHAN_WIDTH_80;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_160MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_160;
318 break;
319 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
321 break;
322 default:
30eb1dc2
JB		 323 if (verbose)
324 sdata_info(sdata,
325 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
326 vht_oper->chan_width);
6565ec9b
JB		 327 ret = IEEE80211_STA_DISABLE_VHT;
328 goto out;
329 }
330
331 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 332 if (verbose)
333 sdata_info(sdata,
334 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 335 ret = IEEE80211_STA_DISABLE_VHT;
336 goto out;
337 }
338
339 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
340 ret = 0;
341 goto out;
342 }
343
344 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 345 if (verbose)
346 sdata_info(sdata,
347 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 348 ret = IEEE80211_STA_DISABLE_VHT;
349 goto out;
350 }
351
352 *chandef = vht_chandef;
353
354 ret = 0;
355
356out:
586e01ed
JB		 357 /* don't print the message below for VHT mismatch if VHT is disabled */
358 if (ret & IEEE80211_STA_DISABLE_VHT)
359 vht_chandef = *chandef;
360
6565ec9b
JB		 361 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
362 IEEE80211_CHAN_DISABLED)) {
363 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
364 ret = IEEE80211_STA_DISABLE_HT |
365 IEEE80211_STA_DISABLE_VHT;
366 goto out;
367 }
368
369 ret |= chandef_downgrade(chandef);
370 }
371
30eb1dc2 372 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 373 sdata_info(sdata,
374 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
375
376 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
377 return ret;
378}
379
30eb1dc2
JB		 380static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
381 struct sta_info *sta,
382 const struct ieee80211_ht_operation *ht_oper,
383 const struct ieee80211_vht_operation *vht_oper,
384 const u8 *bssid, u32 *changed)
d5522e03
JB		 385{
386 struct ieee80211_local *local = sdata->local;
30eb1dc2 387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 388 struct ieee80211_supported_band *sband;
55de908a 389 struct ieee80211_channel *chan;
30eb1dc2 390 struct cfg80211_chan_def chandef;
9ed6bcce 391 u16 ht_opmode;
30eb1dc2
JB		 392 u32 flags;
393 enum ieee80211_sta_rx_bandwidth new_sta_bw;
394 int ret;
d5522e03 395
30eb1dc2
JB		 396 /* if HT was/is disabled, don't track any bandwidth changes */
397 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 398 return 0;
399
30eb1dc2
JB		 400 /* don't check VHT if we associated as non-VHT station */
401 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
402 vht_oper = NULL;
403
404 if (WARN_ON_ONCE(!sta))
405 return -EINVAL;
406
f2d9330e 407 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 408 sband = local->hw.wiphy->bands[chan->band];
d5522e03 409
30eb1dc2
JB		 410 /* calculate new channel (type) based on HT/VHT operation IEs */
411 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
412 vht_oper, &chandef, false);
413
414 /*
415 * Downgrade the new channel if we associated with restricted
416 * capabilities. For example, if we associated as a 20 MHz STA
417 * to a 40 MHz AP (due to regulatory, capabilities or config
418 * reasons) then switching to a 40 MHz channel now won't do us
419 * any good -- we couldn't use it with the AP.
420 */
421 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
422 chandef.width == NL80211_CHAN_WIDTH_80P80)
423 flags |= chandef_downgrade(&chandef);
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_160)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
428 chandef.width > NL80211_CHAN_WIDTH_20)
429 flags |= chandef_downgrade(&chandef);
430
431 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
432 return 0;
433
434 sdata_info(sdata,
435 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
436 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
437 chandef.center_freq1, chandef.center_freq2);
438
439 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
440 IEEE80211_STA_DISABLE_VHT |
441 IEEE80211_STA_DISABLE_40MHZ |
442 IEEE80211_STA_DISABLE_80P80MHZ |
443 IEEE80211_STA_DISABLE_160MHZ)) ||
444 !cfg80211_chandef_valid(&chandef)) {
445 sdata_info(sdata,
446 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
447 ifmgd->bssid);
448 return -EINVAL;
449 }
450
451 switch (chandef.width) {
452 case NL80211_CHAN_WIDTH_20_NOHT:
453 case NL80211_CHAN_WIDTH_20:
454 new_sta_bw = IEEE80211_STA_RX_BW_20;
455 break;
4bf88530 456 case NL80211_CHAN_WIDTH_40:
30eb1dc2 457 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 458 break;
30eb1dc2
JB		 459 case NL80211_CHAN_WIDTH_80:
460 new_sta_bw = IEEE80211_STA_RX_BW_80;
461 break;
462 case NL80211_CHAN_WIDTH_80P80:
463 case NL80211_CHAN_WIDTH_160:
464 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 465 break;
30eb1dc2
JB		 466 default:
467 return -EINVAL;
64f68e5d 468 }
d5522e03 469
30eb1dc2
JB		 470 if (new_sta_bw > sta->cur_max_bandwidth)
471 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 472
30eb1dc2
JB		 473 if (new_sta_bw < sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
477 }
64f68e5d 478
30eb1dc2
JB		 479 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
480 if (ret) {
481 sdata_info(sdata,
482 "AP %pM changed bandwidth to incompatible one - disconnect\n",
483 ifmgd->bssid);
484 return ret;
485 }
7cc44ed4 486
30eb1dc2
JB		 487 if (new_sta_bw > sta->sta.bandwidth) {
488 sta->sta.bandwidth = new_sta_bw;
489 rate_control_rate_update(local, sband, sta,
490 IEEE80211_RC_BW_CHANGED);
0aaffa9b 491 }
d5522e03 492
074d46d1 493 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 494
495 /* if bss configuration changed store the new one */
30eb1dc2
JB		 496 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
497 *changed |= BSS_CHANGED_HT;
9ed6bcce 498 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 499 }
500
30eb1dc2 501 return 0;
d5522e03
JB		 502}
503
9c6bd790
JB		 504/* frame sending functions */
505
66e67e41
JB		 506static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
507 struct ieee80211_supported_band *sband,
508 u32 *rates)
509{
510 int i, j, count;
511 *rates = 0;
512 count = 0;
513 for (i = 0; i < supp_rates_len; i++) {
514 int rate = (supp_rates[i] & 0x7F) * 5;
515
516 for (j = 0; j < sband->n_bitrates; j++)
517 if (sband->bitrates[j].bitrate == rate) {
518 *rates |= BIT(j);
519 count++;
520 break;
521 }
522 }
523
524 return count;
525}
526
527static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 528 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 529 struct ieee80211_supported_band *sband,
530 struct ieee80211_channel *channel,
531 enum ieee80211_smps_mode smps)
532{
66e67e41
JB		 533 u8 *pos;
534 u32 flags = channel->flags;
535 u16 cap;
536 struct ieee80211_sta_ht_cap ht_cap;
537
538 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
539
66e67e41
JB		 540 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
541 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
542
66e67e41
JB		 543 /* determine capability flags */
544 cap = ht_cap.cap;
545
9dde6423 546 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 547 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
548 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
549 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
550 cap &= ~IEEE80211_HT_CAP_SGI_40;
551 }
552 break;
553 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
554 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
555 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
556 cap &= ~IEEE80211_HT_CAP_SGI_40;
557 }
558 break;
559 }
560
24398e39
JB		 561 /*
562 * If 40 MHz was disabled associate as though we weren't
563 * capable of 40 MHz -- some broken APs will never fall
564 * back to trying to transmit in 20 MHz.
565 */
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
567 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
568 cap &= ~IEEE80211_HT_CAP_SGI_40;
569 }
570
66e67e41
JB		 571 /* set SM PS mode properly */
572 cap &= ~IEEE80211_HT_CAP_SM_PS;
573 switch (smps) {
574 case IEEE80211_SMPS_AUTOMATIC:
575 case IEEE80211_SMPS_NUM_MODES:
576 WARN_ON(1);
577 case IEEE80211_SMPS_OFF:
578 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
579 IEEE80211_HT_CAP_SM_PS_SHIFT;
580 break;
581 case IEEE80211_SMPS_STATIC:
582 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
583 IEEE80211_HT_CAP_SM_PS_SHIFT;
584 break;
585 case IEEE80211_SMPS_DYNAMIC:
586 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
587 IEEE80211_HT_CAP_SM_PS_SHIFT;
588 break;
589 }
590
591 /* reserve and fill IE */
592 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
593 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
594}
595
d545daba
MP		 596static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
597 struct sk_buff *skb,
b08fbbd8
JB		 598 struct ieee80211_supported_band *sband,
599 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 600{
601 u8 *pos;
602 u32 cap;
603 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 604 int i;
d545daba
MP		 605
606 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
607
608 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 609 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 610
611 /* determine capability flags */
612 cap = vht_cap.cap;
613
f2d9d270
JB		 614 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
615 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
616 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
617 }
618
619 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
620 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
621 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
622 }
623
b08fbbd8
JB		 624 /*
625 * Some APs apparently get confused if our capabilities are better
626 * than theirs, so restrict what we advertise in the assoc request.
627 */
628 if (!(ap_vht_cap->vht_cap_info &
629 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
630 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
631
632 if (!(ap_vht_cap->vht_cap_info &
633 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
634 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
635 IEEE80211_VHT_CAP_RXSTBC_3 |
636 IEEE80211_VHT_CAP_RXSTBC_4);
637
638 for (i = 0; i < 8; i++) {
639 int shift = i * 2;
640 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
641 u16 ap_mcs, our_mcs;
642
643 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
644 mask) >> shift;
645 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
646 mask) >> shift;
647
24af717c
JB		 648 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
649 continue;
650
b08fbbd8
JB		 651 switch (ap_mcs) {
652 default:
653 if (our_mcs <= ap_mcs)
654 break;
655 /* fall through */
656 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
657 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
658 vht_cap.vht_mcs.rx_mcs_map |=
659 cpu_to_le16(ap_mcs << shift);
660 }
661 }
662
d545daba 663 /* reserve and fill IE */
d4950281 664 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 665 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
666}
667
66e67e41
JB		 668static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
669{
670 struct ieee80211_local *local = sdata->local;
671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
672 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
673 struct sk_buff *skb;
674 struct ieee80211_mgmt *mgmt;
675 u8 *pos, qos_info;
676 size_t offset = 0, noffset;
677 int i, count, rates_len, supp_rates_len;
678 u16 capab;
679 struct ieee80211_supported_band *sband;
55de908a
JB		 680 struct ieee80211_chanctx_conf *chanctx_conf;
681 struct ieee80211_channel *chan;
66e67e41 682 u32 rates = 0;
66e67e41
JB		 683
684 lockdep_assert_held(&ifmgd->mtx);
685
55de908a
JB		 686 rcu_read_lock();
687 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
688 if (WARN_ON(!chanctx_conf)) {
689 rcu_read_unlock();
690 return;
691 }
4bf88530 692 chan = chanctx_conf->def.chan;
55de908a
JB		 693 rcu_read_unlock();
694 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 695
696 if (assoc_data->supp_rates_len) {
697 /*
698 * Get all rates supported by the device and the AP as
699 * some APs don't like getting a superset of their rates
700 * in the association request (e.g. D-Link DAP 1353 in
701 * b-only mode)...
702 */
703 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
704 assoc_data->supp_rates_len,
705 sband, &rates);
706 } else {
707 /*
708 * In case AP not provide any supported rates information
709 * before association, we send information element(s) with
710 * all rates that we support.
711 */
712 rates = ~0;
713 rates_len = sband->n_bitrates;
714 }
715
716 skb = alloc_skb(local->hw.extra_tx_headroom +
717 sizeof(*mgmt) + /* bit too much but doesn't matter */
718 2 + assoc_data->ssid_len + /* SSID */
719 4 + rates_len + /* (extended) rates */
720 4 + /* power capability */
721 2 + 2 * sband->n_channels + /* supported channels */
722 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 723 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 724 assoc_data->ie_len + /* extra IEs */
725 9, /* WMM */
726 GFP_KERNEL);
727 if (!skb)
728 return;
729
730 skb_reserve(skb, local->hw.extra_tx_headroom);
731
732 capab = WLAN_CAPABILITY_ESS;
733
734 if (sband->band == IEEE80211_BAND_2GHZ) {
735 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
736 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
737 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
738 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
739 }
740
741 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
742 capab |= WLAN_CAPABILITY_PRIVACY;
743
744 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
745 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
746 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
747
748 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
749 memset(mgmt, 0, 24);
750 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
751 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
752 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
753
754 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
755 skb_put(skb, 10);
756 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
757 IEEE80211_STYPE_REASSOC_REQ);
758 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
759 mgmt->u.reassoc_req.listen_interval =
760 cpu_to_le16(local->hw.conf.listen_interval);
761 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
762 ETH_ALEN);
763 } else {
764 skb_put(skb, 4);
765 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
766 IEEE80211_STYPE_ASSOC_REQ);
767 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
768 mgmt->u.assoc_req.listen_interval =
769 cpu_to_le16(local->hw.conf.listen_interval);
770 }
771
772 /* SSID */
773 pos = skb_put(skb, 2 + assoc_data->ssid_len);
774 *pos++ = WLAN_EID_SSID;
775 *pos++ = assoc_data->ssid_len;
776 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
777
778 /* add all rates which were marked to be used above */
779 supp_rates_len = rates_len;
780 if (supp_rates_len > 8)
781 supp_rates_len = 8;
782
783 pos = skb_put(skb, supp_rates_len + 2);
784 *pos++ = WLAN_EID_SUPP_RATES;
785 *pos++ = supp_rates_len;
786
787 count = 0;
788 for (i = 0; i < sband->n_bitrates; i++) {
789 if (BIT(i) & rates) {
790 int rate = sband->bitrates[i].bitrate;
791 *pos++ = (u8) (rate / 5);
792 if (++count == 8)
793 break;
794 }
795 }
796
797 if (rates_len > count) {
798 pos = skb_put(skb, rates_len - count + 2);
799 *pos++ = WLAN_EID_EXT_SUPP_RATES;
800 *pos++ = rates_len - count;
801
802 for (i++; i < sband->n_bitrates; i++) {
803 if (BIT(i) & rates) {
804 int rate = sband->bitrates[i].bitrate;
805 *pos++ = (u8) (rate / 5);
806 }
807 }
808 }
809
810 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
811 /* 1. power capabilities */
812 pos = skb_put(skb, 4);
813 *pos++ = WLAN_EID_PWR_CAPABILITY;
814 *pos++ = 2;
815 *pos++ = 0; /* min tx power */
55de908a 816 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 817
818 /* 2. supported channels */
819 /* TODO: get this in reg domain format */
820 pos = skb_put(skb, 2 * sband->n_channels + 2);
821 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
822 *pos++ = 2 * sband->n_channels;
823 for (i = 0; i < sband->n_channels; i++) {
824 *pos++ = ieee80211_frequency_to_channel(
825 sband->channels[i].center_freq);
826 *pos++ = 1; /* one channel in the subband*/
827 }
828 }
829
830 /* if present, add any custom IEs that go before HT */
831 if (assoc_data->ie_len && assoc_data->ie) {
832 static const u8 before_ht[] = {
833 WLAN_EID_SSID,
834 WLAN_EID_SUPP_RATES,
835 WLAN_EID_EXT_SUPP_RATES,
836 WLAN_EID_PWR_CAPABILITY,
837 WLAN_EID_SUPPORTED_CHANNELS,
838 WLAN_EID_RSN,
839 WLAN_EID_QOS_CAPA,
840 WLAN_EID_RRM_ENABLED_CAPABILITIES,
841 WLAN_EID_MOBILITY_DOMAIN,
842 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
843 };
844 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
845 before_ht, ARRAY_SIZE(before_ht),
846 offset);
847 pos = skb_put(skb, noffset - offset);
848 memcpy(pos, assoc_data->ie + offset, noffset - offset);
849 offset = noffset;
850 }
851
f2d9d270
JB		 852 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
853 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
854 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
855
a8243b72 856 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 857 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 858 sband, chan, sdata->smps_mode);
66e67e41 859
d545daba 860 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 861 ieee80211_add_vht_ie(sdata, skb, sband,
862 &assoc_data->ap_vht_cap);
d545daba 863
66e67e41
JB		 864 /* if present, add any custom non-vendor IEs that go after HT */
865 if (assoc_data->ie_len && assoc_data->ie) {
866 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
867 assoc_data->ie_len,
868 offset);
869 pos = skb_put(skb, noffset - offset);
870 memcpy(pos, assoc_data->ie + offset, noffset - offset);
871 offset = noffset;
872 }
873
76f0303d
JB		 874 if (assoc_data->wmm) {
875 if (assoc_data->uapsd) {
dc41e4d4
EP		 876 qos_info = ifmgd->uapsd_queues;
877 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 878 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
879 } else {
880 qos_info = 0;
881 }
882
883 pos = skb_put(skb, 9);
884 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
885 *pos++ = 7; /* len */
886 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
887 *pos++ = 0x50;
888 *pos++ = 0xf2;
889 *pos++ = 2; /* WME */
890 *pos++ = 0; /* WME info */
891 *pos++ = 1; /* WME ver */
892 *pos++ = qos_info;
893 }
894
895 /* add any remaining custom (i.e. vendor specific here) IEs */
896 if (assoc_data->ie_len && assoc_data->ie) {
897 noffset = assoc_data->ie_len;
898 pos = skb_put(skb, noffset - offset);
899 memcpy(pos, assoc_data->ie + offset, noffset - offset);
900 }
901
a1845fc7
JB		 902 drv_mgd_prepare_tx(local, sdata);
903
66e67e41 904 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 905 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
907 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 908 ieee80211_tx_skb(sdata, skb);
909}
910
572e0012
KV		 911void ieee80211_send_pspoll(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913{
572e0012
KV		 914 struct ieee80211_pspoll *pspoll;
915 struct sk_buff *skb;
572e0012 916
d8cd189e
KV		 917 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
918 if (!skb)
572e0012 919 return;
572e0012 920
d8cd189e
KV		 921 pspoll = (struct ieee80211_pspoll *) skb->data;
922 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 923
62ae67be
JB		 924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
925 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 926}
927
965bedad
JB		 928void ieee80211_send_nullfunc(struct ieee80211_local *local,
929 struct ieee80211_sub_if_data *sdata,
930 int powersave)
931{
932 struct sk_buff *skb;
d8cd189e 933 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 935
d8cd189e
KV		 936 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
937 if (!skb)
965bedad 938 return;
965bedad 939
d8cd189e 940 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 941 if (powersave)
d8cd189e 942 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 943
6c17b77b
SF		 944 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
945 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 946 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
947 IEEE80211_STA_CONNECTION_POLL))
948 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
949
62ae67be 950 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 951}
952
d524215f
FF		 953static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
954 struct ieee80211_sub_if_data *sdata)
955{
956 struct sk_buff *skb;
957 struct ieee80211_hdr *nullfunc;
958 __le16 fc;
959
960 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
961 return;
962
963 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 964 if (!skb)
d524215f 965 return;
d15b8459 966
d524215f
FF		 967 skb_reserve(skb, local->hw.extra_tx_headroom);
968
969 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
970 memset(nullfunc, 0, 30);
971 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
972 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
973 nullfunc->frame_control = fc;
974 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
975 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
976 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
977 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
978
979 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
980 ieee80211_tx_skb(sdata, skb);
981}
982
cc32abd4
JB		 983/* spectrum management related things */
984static void ieee80211_chswitch_work(struct work_struct *work)
985{
986 struct ieee80211_sub_if_data *sdata =
987 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
989
9607e6b6 990 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 991 return;
992
77fdaa12
JB		 993 mutex_lock(&ifmgd->mtx);
994 if (!ifmgd->associated)
995 goto out;
cc32abd4 996
55de908a 997 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 998 if (!sdata->local->ops->channel_switch) {
999 /* call "hw_config" only if doing sw channel switch */
1000 ieee80211_hw_config(sdata->local,
1001 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1002 } else {
1003 /* update the device channel directly */
55de908a 1004 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1005 }
77fdaa12 1006
cc32abd4 1007 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1008 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1009
57eebdf3 1010 /* XXX: wait for a beacon first? */
cc32abd4 1011 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 1012 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 1013 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1014 out:
1015 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1016 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1017}
1018
5ce6e438
JB		 1019void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1020{
55de908a
JB		 1021 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1023
1024 trace_api_chswitch_done(sdata, success);
1025 if (!success) {
882a7c69
JB		 1026 sdata_info(sdata,
1027 "driver channel switch failed, disconnecting\n");
1028 ieee80211_queue_work(&sdata->local->hw,
1029 &ifmgd->csa_connection_drop_work);
1030 } else {
1031 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1032 }
5ce6e438
JB		 1033}
1034EXPORT_SYMBOL(ieee80211_chswitch_done);
1035
cc32abd4
JB		 1036static void ieee80211_chswitch_timer(unsigned long data)
1037{
1038 struct ieee80211_sub_if_data *sdata =
1039 (struct ieee80211_sub_if_data *) data;
5bb644a0 1040
9b7d72c1 1041 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1042}
1043
4a3cb702
JB		 1044void
1045ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1046 const struct ieee80211_channel_sw_ie *sw_elem,
1047 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1048{
0c1ad2ca
JB		 1049 struct cfg80211_bss *cbss =
1050 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1051 struct ieee80211_channel *new_ch;
1052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1053 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1054 cbss->channel->band);
55de908a 1055 struct ieee80211_chanctx *chanctx;
cc32abd4 1056
77fdaa12
JB		 1057 ASSERT_MGD_MTX(ifmgd);
1058
1059 if (!ifmgd->associated)
cc32abd4
JB		 1060 return;
1061
fbe9c429 1062 if (sdata->local->scanning)
cc32abd4
JB		 1063 return;
1064
1065 /* Disregard subsequent beacons if we are already running a timer
1066 processing a CSA */
1067
1068 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1069 return;
1070
1071 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1072 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1073 sdata_info(sdata,
1074 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1075 ifmgd->associated->bssid, new_freq);
1076 ieee80211_queue_work(&sdata->local->hw,
1077 &ifmgd->csa_connection_drop_work);
cc32abd4 1078 return;
882a7c69 1079 }
cc32abd4 1080
57eebdf3
JB		 1081 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1082
55de908a
JB		 1083 if (sdata->local->use_chanctx) {
1084 sdata_info(sdata,
1085 "not handling channel switch with channel contexts\n");
1086 ieee80211_queue_work(&sdata->local->hw,
1087 &ifmgd->csa_connection_drop_work);
246dc3fd 1088 return;
55de908a
JB		 1089 }
1090
1091 mutex_lock(&sdata->local->chanctx_mtx);
1092 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1093 mutex_unlock(&sdata->local->chanctx_mtx);
1094 return;
1095 }
1096 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1097 struct ieee80211_chanctx, conf);
1098 if (chanctx->refcount > 1) {
1099 sdata_info(sdata,
1100 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1101 ieee80211_queue_work(&sdata->local->hw,
1102 &ifmgd->csa_connection_drop_work);
1103 mutex_unlock(&sdata->local->chanctx_mtx);
1104 return;
1105 }
1106 mutex_unlock(&sdata->local->chanctx_mtx);
1107
1108 sdata->local->csa_channel = new_ch;
1109
57eebdf3
JB		 1110 if (sw_elem->mode)
1111 ieee80211_stop_queues_by_reason(&sdata->local->hw,
445ea4e8 1112 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1113 IEEE80211_QUEUE_STOP_REASON_CSA);
1114
5ce6e438
JB		 1115 if (sdata->local->ops->channel_switch) {
1116 /* use driver's channel switch callback */
57eebdf3
JB		 1117 struct ieee80211_channel_switch ch_switch = {
1118 .timestamp = timestamp,
1119 .block_tx = sw_elem->mode,
1120 .channel = new_ch,
1121 .count = sw_elem->count,
1122 };
1123
5ce6e438
JB		 1124 drv_channel_switch(sdata->local, &ch_switch);
1125 return;
1126 }
1127
1128 /* channel switch handled in software */
57eebdf3 1129 if (sw_elem->count <= 1)
42935eca 1130 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1131 else
cc32abd4 1132 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1133 TU_TO_EXP_TIME(sw_elem->count *
1134 cbss->beacon_interval));
cc32abd4
JB		 1135}
1136
1ea6f9c0
JB		 1137static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1138 struct ieee80211_channel *channel,
1139 const u8 *country_ie, u8 country_ie_len,
1140 const u8 *pwr_constr_elem)
cc32abd4 1141{
04b7b2ff
JB		 1142 struct ieee80211_country_ie_triplet *triplet;
1143 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1144 int i, chan_pwr, chan_increment, new_ap_level;
1145 bool have_chan_pwr = false;
cc32abd4 1146
04b7b2ff
JB		 1147 /* Invalid IE */
1148 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1149 return 0;
cc32abd4 1150
04b7b2ff
JB		 1151 triplet = (void *)(country_ie + 3);
1152 country_ie_len -= 3;
1153
1154 switch (channel->band) {
1155 default:
1156 WARN_ON_ONCE(1);
1157 /* fall through */
1158 case IEEE80211_BAND_2GHZ:
1159 case IEEE80211_BAND_60GHZ:
1160 chan_increment = 1;
1161 break;
1162 case IEEE80211_BAND_5GHZ:
1163 chan_increment = 4;
1164 break;
cc32abd4 1165 }
04b7b2ff
JB		 1166
1167 /* find channel */
1168 while (country_ie_len >= 3) {
1169 u8 first_channel = triplet->chans.first_channel;
1170
1171 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1172 goto next;
1173
1174 for (i = 0; i < triplet->chans.num_channels; i++) {
1175 if (first_channel + i * chan_increment == chan) {
1176 have_chan_pwr = true;
1177 chan_pwr = triplet->chans.max_power;
1178 break;
1179 }
1180 }
1181 if (have_chan_pwr)
1182 break;
1183
1184 next:
1185 triplet++;
1186 country_ie_len -= 3;
1187 }
1188
1189 if (!have_chan_pwr)
1ea6f9c0 1190 return 0;
04b7b2ff
JB		 1191
1192 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1193
1ea6f9c0
JB		 1194 if (sdata->ap_power_level == new_ap_level)
1195 return 0;
04b7b2ff
JB		 1196
1197 sdata_info(sdata,
1198 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1199 new_ap_level, chan_pwr, *pwr_constr_elem,
1200 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1201 sdata->ap_power_level = new_ap_level;
1202 if (__ieee80211_recalc_txpower(sdata))
1203 return BSS_CHANGED_TXPOWER;
1204 return 0;
cc32abd4
JB		 1205}
1206
965bedad
JB		 1207/* powersave */
1208static void ieee80211_enable_ps(struct ieee80211_local *local,
1209 struct ieee80211_sub_if_data *sdata)
1210{
1211 struct ieee80211_conf *conf = &local->hw.conf;
1212
d5edaedc
JB		 1213 /*
1214 * If we are scanning right now then the parameters will
1215 * take effect when scan finishes.
1216 */
fbe9c429 1217 if (local->scanning)
d5edaedc
JB		 1218 return;
1219
965bedad
JB		 1220 if (conf->dynamic_ps_timeout > 0 &&
1221 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1222 mod_timer(&local->dynamic_ps_timer, jiffies +
1223 msecs_to_jiffies(conf->dynamic_ps_timeout));
1224 } else {
1225 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1226 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1227
2a13052f
JO		 1228 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1229 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1230 return;
1231
1232 conf->flags |= IEEE80211_CONF_PS;
1233 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1234 }
1235}
1236
1237static void ieee80211_change_ps(struct ieee80211_local *local)
1238{
1239 struct ieee80211_conf *conf = &local->hw.conf;
1240
1241 if (local->ps_sdata) {
965bedad
JB		 1242 ieee80211_enable_ps(local, local->ps_sdata);
1243 } else if (conf->flags & IEEE80211_CONF_PS) {
1244 conf->flags &= ~IEEE80211_CONF_PS;
1245 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1246 del_timer_sync(&local->dynamic_ps_timer);
1247 cancel_work_sync(&local->dynamic_ps_enable_work);
1248 }
1249}
1250
808118cb
JY		 1251static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1252{
1253 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1254 struct sta_info *sta = NULL;
c2c98fde 1255 bool authorized = false;
808118cb
JY		 1256
1257 if (!mgd->powersave)
1258 return false;
1259
05cb9108
JB		 1260 if (mgd->broken_ap)
1261 return false;
1262
808118cb
JY		 1263 if (!mgd->associated)
1264 return false;
1265
808118cb
JY		 1266 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1267 IEEE80211_STA_CONNECTION_POLL))
1268 return false;
1269
1270 rcu_read_lock();
1271 sta = sta_info_get(sdata, mgd->bssid);
1272 if (sta)
c2c98fde 1273 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1274 rcu_read_unlock();
1275
c2c98fde 1276 return authorized;
808118cb
JY		 1277}
1278
965bedad 1279/* need to hold RTNL or interface lock */
10f644a4 1280void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1281{
1282 struct ieee80211_sub_if_data *sdata, *found = NULL;
1283 int count = 0;
195e294d 1284 int timeout;
965bedad
JB		 1285
1286 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1287 local->ps_sdata = NULL;
1288 return;
1289 }
1290
1291 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1292 if (!ieee80211_sdata_running(sdata))
965bedad 1293 continue;
8c7914de
RM		 1294 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1295 /* If an AP vif is found, then disable PS
1296 * by setting the count to zero thereby setting
1297 * ps_sdata to NULL.
1298 */
1299 count = 0;
1300 break;
1301 }
965bedad
JB		 1302 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1303 continue;
1304 found = sdata;
1305 count++;
1306 }
1307
808118cb 1308 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1309 s32 beaconint_us;
1310
1311 if (latency < 0)
ed77134b 1312 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1313
1314 beaconint_us = ieee80211_tu_to_usec(
1315 found->vif.bss_conf.beacon_int);
1316
ff616381 1317 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1318 if (timeout < 0) {
1319 /*
ff616381
JO		 1320 * Go to full PSM if the user configures a very low
1321 * latency requirement.
0ab82b04
EP		 1322 * The 2000 second value is there for compatibility
1323 * until the PM_QOS_NETWORK_LATENCY is configured
1324 * with real values.
195e294d 1325 */
0ab82b04
EP		 1326 if (latency > (1900 * USEC_PER_MSEC) &&
1327 latency != (2000 * USEC_PER_SEC))
195e294d 1328 timeout = 0;
ff616381
JO		 1329 else
1330 timeout = 100;
195e294d 1331 }
09b85568 1332 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1333
04fe2037 1334 if (beaconint_us > latency) {
10f644a4 1335 local->ps_sdata = NULL;
04fe2037 1336 } else {
04fe2037 1337 int maxslp = 1;
826262c3 1338 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1339
1340 /* If the TIM IE is invalid, pretend the value is 1 */
1341 if (!dtimper)
1342 dtimper = 1;
1343 else if (dtimper > 1)
04fe2037
JB		 1344 maxslp = min_t(int, dtimper,
1345 latency / beaconint_us);
1346
9ccebe61 1347 local->hw.conf.max_sleep_period = maxslp;
56007a02 1348 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1349 local->ps_sdata = found;
04fe2037 1350 }
10f644a4 1351 } else {
965bedad 1352 local->ps_sdata = NULL;
10f644a4 1353 }
965bedad
JB		 1354
1355 ieee80211_change_ps(local);
1356}
1357
ab095877
EP		 1358void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1359{
1360 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1361
1362 if (sdata->vif.bss_conf.ps != ps_allowed) {
1363 sdata->vif.bss_conf.ps = ps_allowed;
1364 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1365 }
1366}
1367
965bedad
JB		 1368void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1369{
1370 struct ieee80211_local *local =
1371 container_of(work, struct ieee80211_local,
1372 dynamic_ps_disable_work);
1373
1374 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1375 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1376 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1377 }
1378
1379 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1380 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1381 IEEE80211_QUEUE_STOP_REASON_PS);
1382}
1383
1384void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1385{
1386 struct ieee80211_local *local =
1387 container_of(work, struct ieee80211_local,
1388 dynamic_ps_enable_work);
1389 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1390 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1391 unsigned long flags;
1392 int q;
965bedad
JB		 1393
1394 /* can only happen when PS was just disabled anyway */
1395 if (!sdata)
1396 return;
1397
5e34069c
CL		 1398 ifmgd = &sdata->u.mgd;
1399
965bedad
JB		 1400 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1401 return;
1402
09b85568 1403 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1404 /* don't enter PS if TX frames are pending */
1405 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1406 mod_timer(&local->dynamic_ps_timer, jiffies +
1407 msecs_to_jiffies(
1408 local->hw.conf.dynamic_ps_timeout));
1409 return;
1410 }
77b7023a
AN		 1411
1412 /*
1413 * transmission can be stopped by others which leads to
1414 * dynamic_ps_timer expiry. Postpone the ps timer if it
1415 * is not the actual idle state.
1416 */
1417 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1418 for (q = 0; q < local->hw.queues; q++) {
1419 if (local->queue_stop_reasons[q]) {
1420 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1421 flags);
1422 mod_timer(&local->dynamic_ps_timer, jiffies +
1423 msecs_to_jiffies(
1424 local->hw.conf.dynamic_ps_timeout));
1425 return;
1426 }
1427 }
1428 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1429 }
1ddc2867 1430
375177bf 1431 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1432 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1433 netif_tx_stop_all_queues(sdata->dev);
965bedad 1434
e8306f98
VN		 1435 if (drv_tx_frames_pending(local))
1436 mod_timer(&local->dynamic_ps_timer, jiffies +
1437 msecs_to_jiffies(
1438 local->hw.conf.dynamic_ps_timeout));
1439 else {
1440 ieee80211_send_nullfunc(local, sdata, 1);
1441 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1442 ieee80211_flush_queues(local, sdata);
e8306f98 1443 }
f3e85b9e
VN		 1444 }
1445
2a13052f
JO		 1446 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1447 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1448 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1449 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1450 local->hw.conf.flags |= IEEE80211_CONF_PS;
1451 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1452 }
f3e85b9e 1453
77b7023a
AN		 1454 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1455 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1456}
1457
1458void ieee80211_dynamic_ps_timer(unsigned long data)
1459{
1460 struct ieee80211_local *local = (void *) data;
1461
78f1a8b7 1462 if (local->quiescing || local->suspended)
5bb644a0
JB		 1463 return;
1464
42935eca 1465 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1466}
1467
164eb02d
SW		 1468void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1469{
1470 struct delayed_work *delayed_work =
1471 container_of(work, struct delayed_work, work);
1472 struct ieee80211_sub_if_data *sdata =
1473 container_of(delayed_work, struct ieee80211_sub_if_data,
1474 dfs_cac_timer_work);
1475
1476 ieee80211_vif_release_channel(sdata);
1477
1478 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1479}
1480
60f8b39c 1481/* MLME */
7d25745d 1482static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1483 struct ieee80211_sub_if_data *sdata,
4a3cb702 1484 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1485{
f0706e82 1486 struct ieee80211_tx_queue_params params;
4ced3f74 1487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1488 size_t left;
1489 int count;
4a3cb702
JB		 1490 const u8 *pos;
1491 u8 uapsd_queues = 0;
f0706e82 1492
e1b3ec1a 1493 if (!local->ops->conf_tx)
7d25745d 1494 return false;
e1b3ec1a 1495
32c5057b 1496 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1497 return false;
3434fbd3
JB		 1498
1499 if (!wmm_param)
7d25745d 1500 return false;
3434fbd3 1501
f0706e82 1502 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1503 return false;
ab13315a
KV		 1504
1505 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1506 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1507
f0706e82 1508 count = wmm_param[6] & 0x0f;
46900298 1509 if (count == ifmgd->wmm_last_param_set)
7d25745d 1510 return false;
46900298 1511 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1512
1513 pos = wmm_param + 8;
1514 left = wmm_param_len - 8;
1515
1516 memset(&params, 0, sizeof(params));
1517
00e96dec 1518 sdata->wmm_acm = 0;
f0706e82
JB		 1519 for (; left >= 4; left -= 4, pos += 4) {
1520 int aci = (pos[0] >> 5) & 0x03;
1521 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1522 bool uapsd = false;
f0706e82
JB		 1523 int queue;
1524
1525 switch (aci) {
0eeb59fe 1526 case 1: /* AC_BK */
e100bb64 1527 queue = 3;
988c0f72 1528 if (acm)
00e96dec 1529 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1530 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1531 uapsd = true;
f0706e82 1532 break;
0eeb59fe 1533 case 2: /* AC_VI */
e100bb64 1534 queue = 1;
988c0f72 1535 if (acm)
00e96dec 1536 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1537 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1538 uapsd = true;
f0706e82 1539 break;
0eeb59fe 1540 case 3: /* AC_VO */
e100bb64 1541 queue = 0;
988c0f72 1542 if (acm)
00e96dec 1543 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1544 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1545 uapsd = true;
f0706e82 1546 break;
0eeb59fe 1547 case 0: /* AC_BE */
f0706e82 1548 default:
e100bb64 1549 queue = 2;
988c0f72 1550 if (acm)
00e96dec 1551 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1552 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1553 uapsd = true;
f0706e82
JB		 1554 break;
1555 }
1556
1557 params.aifs = pos[0] & 0x0f;
1558 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1559 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1560 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1561 params.uapsd = uapsd;
1562
bdcbd8e0
JB		 1563 mlme_dbg(sdata,
1564 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1565 queue, aci, acm,
1566 params.aifs, params.cw_min, params.cw_max,
1567 params.txop, params.uapsd);
f6f3def3
EP		 1568 sdata->tx_conf[queue] = params;
1569 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1570 sdata_err(sdata,
1571 "failed to set TX queue parameters for queue %d\n",
1572 queue);
f0706e82 1573 }
e1b3ec1a
SG		 1574
1575 /* enable WMM or activate new settings */
4ced3f74 1576 sdata->vif.bss_conf.qos = true;
7d25745d 1577 return true;
f0706e82
JB		 1578}
1579
925e64c3
SG		 1580static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1581{
1582 lockdep_assert_held(&sdata->local->mtx);
1583
1584 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1585 IEEE80211_STA_BEACON_POLL);
1586 ieee80211_run_deferred_scan(sdata->local);
1587}
1588
1589static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1590{
1591 mutex_lock(&sdata->local->mtx);
1592 __ieee80211_stop_poll(sdata);
1593 mutex_unlock(&sdata->local->mtx);
1594}
1595
7a5158ef
JB		 1596static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1597 u16 capab, bool erp_valid, u8 erp)
5628221c 1598{
bda3933a 1599 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1600 u32 changed = 0;
7a5158ef
JB		 1601 bool use_protection;
1602 bool use_short_preamble;
1603 bool use_short_slot;
1604
1605 if (erp_valid) {
1606 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1607 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1608 } else {
1609 use_protection = false;
1610 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1611 }
1612
1613 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1614 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1615 use_short_slot = true;
5628221c 1616
471b3efd 1617 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1618 bss_conf->use_cts_prot = use_protection;
1619 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1620 }
7e9ed188 1621
d43c7b37 1622 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1623 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1624 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1625 }
d9430a32 1626
7a5158ef 1627 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1628 bss_conf->use_short_slot = use_short_slot;
1629 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1630 }
1631
1632 return changed;
1633}
1634
f698d856 1635static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1636 struct cfg80211_bss *cbss,
ae5eb026 1637 u32 bss_info_changed)
f0706e82 1638{
0c1ad2ca 1639 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1640 struct ieee80211_local *local = sdata->local;
68542962 1641 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1642
ae5eb026 1643 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1644 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1645 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1646
7ccc8bd7
FF		 1647 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1648 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1649
0c1ad2ca
JB		 1650 sdata->u.mgd.associated = cbss;
1651 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1652
17e4ec14
JM		 1653 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1654
488dd7b5 1655 if (sdata->vif.p2p) {
9caf0364 1656 const struct cfg80211_bss_ies *ies;
488dd7b5 1657
9caf0364
JB		 1658 rcu_read_lock();
1659 ies = rcu_dereference(cbss->ies);
1660 if (ies) {
1661 u8 noa[2];
1662 int ret;
1663
1664 ret = cfg80211_get_p2p_attr(
1665 ies->data, ies->len,
1666 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1667 noa, sizeof(noa));
1668 if (ret >= 2) {
1669 bss_conf->p2p_oppps = noa[1] & 0x80;
1670 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1671 bss_info_changed |= BSS_CHANGED_P2P_PS;
1672 sdata->u.mgd.p2p_noa_index = noa[0];
1673 }
488dd7b5 1674 }
9caf0364 1675 rcu_read_unlock();
488dd7b5
JB		 1676 }
1677
b291ba11 1678 /* just to be sure */
925e64c3 1679 ieee80211_stop_poll(sdata);
b291ba11 1680
9ac19a90 1681 ieee80211_led_assoc(local, 1);
9306102e 1682
c65dd147 1683 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1684 /*
1685 * If the AP is buggy we may get here with no DTIM period
1686 * known, so assume it's 1 which is the only safe assumption
1687 * in that case, although if the TIM IE is broken powersave
1688 * probably just won't work at all.
1689 */
1690 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1691 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1692 } else {
e5b900d2 1693 bss_conf->dtim_period = 0;
826262c3 1694 }
e5b900d2 1695
68542962 1696 bss_conf->assoc = 1;
9cef8737 1697
a97c13c3 1698 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1699 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1700 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1701 bss_info_changed |= BSS_CHANGED_CQM;
1702
68542962 1703 /* Enable ARP filtering */
0f19b41e 1704 if (bss_conf->arp_addr_cnt)
68542962 1705 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1706
ae5eb026 1707 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1708
056508dc
JB		 1709 mutex_lock(&local->iflist_mtx);
1710 ieee80211_recalc_ps(local, -1);
1711 mutex_unlock(&local->iflist_mtx);
e0cb686f 1712
04ecd257 1713 ieee80211_recalc_smps(sdata);
ab095877
EP		 1714 ieee80211_recalc_ps_vif(sdata);
1715
8a5b33f5 1716 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1717 netif_carrier_on(sdata->dev);
f0706e82
JB		 1718}
1719
e69e95db 1720static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1721 u16 stype, u16 reason, bool tx,
1722 u8 *frame_buf)
aa458d17 1723{
46900298 1724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1725 struct ieee80211_local *local = sdata->local;
3cc5240b 1726 u32 changed = 0;
aa458d17 1727
77fdaa12
JB		 1728 ASSERT_MGD_MTX(ifmgd);
1729
37ad3888
JB		 1730 if (WARN_ON_ONCE(tx && !frame_buf))
1731 return;
1732
b291ba11
JB		 1733 if (WARN_ON(!ifmgd->associated))
1734 return;
1735
79543d8e
DS		 1736 ieee80211_stop_poll(sdata);
1737
77fdaa12 1738 ifmgd->associated = NULL;
77fdaa12
JB		 1739
1740 /*
1741 * we need to commit the associated = NULL change because the
1742 * scan code uses that to determine whether this iface should
1743 * go to/wake up from powersave or not -- and could otherwise
1744 * wake the queues erroneously.
1745 */
1746 smp_mb();
1747
1748 /*
1749 * Thus, we can only afterwards stop the queues -- to account
1750 * for the case where another CPU is finishing a scan at this
1751 * time -- we don't want the scan code to enable queues.
1752 */
aa458d17 1753
8a5b33f5 1754 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1755 netif_carrier_off(sdata->dev);
1756
88bc40e8
EP		 1757 /*
1758 * if we want to get out of ps before disassoc (why?) we have
1759 * to do it before sending disassoc, as otherwise the null-packet
1760 * won't be valid.
1761 */
1762 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1763 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1764 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1765 }
1766 local->ps_sdata = NULL;
1767
ab095877
EP		 1768 /* disable per-vif ps */
1769 ieee80211_recalc_ps_vif(sdata);
1770
f823981e
EP		 1771 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1772 if (tx)
39ecc01d 1773 ieee80211_flush_queues(local, sdata);
f823981e 1774
37ad3888
JB		 1775 /* deauthenticate/disassociate now */
1776 if (tx || frame_buf)
88a9e31c
EP		 1777 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1778 reason, tx, frame_buf);
37ad3888
JB		 1779
1780 /* flush out frame */
1781 if (tx)
39ecc01d 1782 ieee80211_flush_queues(local, sdata);
37ad3888 1783
88a9e31c
EP		 1784 /* clear bssid only after building the needed mgmt frames */
1785 memset(ifmgd->bssid, 0, ETH_ALEN);
1786
37ad3888 1787 /* remove AP and TDLS peers */
051007d9 1788 sta_info_flush_defer(sdata);
37ad3888
JB		 1789
1790 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1791 changed |= ieee80211_reset_erp_info(sdata);
1792
f5e5bf25 1793 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1794 changed |= BSS_CHANGED_ASSOC;
1795 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1796
488dd7b5
JB		 1797 sdata->vif.bss_conf.p2p_ctwindow = 0;
1798 sdata->vif.bss_conf.p2p_oppps = false;
1799
dd5ecfea 1800 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1801 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1802 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1803 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1804 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1805
1ea6f9c0 1806 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1807
520eb820
KV		 1808 del_timer_sync(&local->dynamic_ps_timer);
1809 cancel_work_sync(&local->dynamic_ps_enable_work);
1810
68542962 1811 /* Disable ARP filtering */
0f19b41e 1812 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1813 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1814
3abead59
JB		 1815 sdata->vif.bss_conf.qos = false;
1816 changed |= BSS_CHANGED_QOS;
1817
0aaffa9b
JB		 1818 /* The BSSID (not really interesting) and HT changed */
1819 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1820 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1821
3abead59
JB		 1822 /* disassociated - set to defaults now */
1823 ieee80211_set_wmm_default(sdata, false);
1824
b9dcf712
JB		 1825 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1826 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1827 del_timer_sync(&sdata->u.mgd.timer);
1828 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1829
826262c3
JB		 1830 sdata->vif.bss_conf.dtim_period = 0;
1831
028e8da0
JB		 1832 ifmgd->flags = 0;
1833 ieee80211_vif_release_channel(sdata);
aa458d17 1834}
f0706e82 1835
3cf335d5
KV		 1836void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1837 struct ieee80211_hdr *hdr)
1838{
1839 /*
1840 * We can postpone the mgd.timer whenever receiving unicast frames
1841 * from AP because we know that the connection is working both ways
1842 * at that time. But multicast frames (and hence also beacons) must
1843 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1844 * data idle periods for sending the periodic probe request to the
1845 * AP we're connected to.
3cf335d5 1846 */
b291ba11
JB		 1847 if (is_multicast_ether_addr(hdr->addr1))
1848 return;
1849
be099e82 1850 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1851}
f0706e82 1852
4e5ff376
FF		 1853static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1854{
1855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1856 struct ieee80211_local *local = sdata->local;
4e5ff376 1857
133d40f9 1858 mutex_lock(&local->mtx);
4e5ff376 1859 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1860 IEEE80211_STA_CONNECTION_POLL))) {
1861 mutex_unlock(&local->mtx);
1862 return;
1863 }
4e5ff376 1864
925e64c3 1865 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1866
1867 mutex_lock(&local->iflist_mtx);
1868 ieee80211_recalc_ps(local, -1);
1869 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1870
1871 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1872 goto out;
4e5ff376
FF		 1873
1874 /*
1875 * We've received a probe response, but are not sure whether
1876 * we have or will be receiving any beacons or data, so let's
1877 * schedule the timers again, just in case.
1878 */
1879 ieee80211_sta_reset_beacon_monitor(sdata);
1880
1881 mod_timer(&ifmgd->conn_mon_timer,
1882 round_jiffies_up(jiffies +
1883 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1884out:
133d40f9 1885 mutex_unlock(&local->mtx);
4e5ff376
FF		 1886}
1887
1888void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1889 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1890{
75706d0e 1891 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1892 return;
1893
4e5ff376
FF		 1894 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1895 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1896 if (ack)
cab1c7fd 1897 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1898 else
1899 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1900 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1901 return;
4e5ff376 1902 }
cab1c7fd
WD		 1903
1904 if (ack)
1905 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1906}
1907
a43abf29
ML		 1908static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1909{
1910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1911 const u8 *ssid;
f01a067d 1912 u8 *dst = ifmgd->associated->bssid;
180205bd 1913 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1914
1915 /*
1916 * Try sending broadcast probe requests for the last three
1917 * probe requests after the first ones failed since some
1918 * buggy APs only support broadcast probe requests.
1919 */
1920 if (ifmgd->probe_send_count >= unicast_limit)
1921 dst = NULL;
a43abf29 1922
4e5ff376
FF		 1923 /*
1924 * When the hardware reports an accurate Tx ACK status, it's
1925 * better to send a nullfunc frame instead of a probe request,
1926 * as it will kick us off the AP quickly if we aren't associated
1927 * anymore. The timeout will be reset if the frame is ACKed by
1928 * the AP.
1929 */
992e68bf
SD		 1930 ifmgd->probe_send_count++;
1931
04ac3c0e
FF		 1932 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1933 ifmgd->nullfunc_failed = false;
4e5ff376 1934 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1935 } else {
88c868c4
SG		 1936 int ssid_len;
1937
9caf0364 1938 rcu_read_lock();
4e5ff376 1939 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1940 if (WARN_ON_ONCE(ssid == NULL))
1941 ssid_len = 0;
1942 else
1943 ssid_len = ssid[1];
1944
1945 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1946 0, (u32) -1, true, 0,
55de908a 1947 ifmgd->associated->channel, false);
9caf0364 1948 rcu_read_unlock();
4e5ff376 1949 }
a43abf29 1950
180205bd 1951 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1952 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 1953 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1954 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1955}
1956
b291ba11
JB		 1957static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1958 bool beacon)
04de8381 1959{
04de8381 1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1961 bool already = false;
34bfc411 1962
9607e6b6 1963 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1964 return;
1965
77fdaa12
JB		 1966 mutex_lock(&ifmgd->mtx);
1967
1968 if (!ifmgd->associated)
1969 goto out;
1970
133d40f9
SG		 1971 mutex_lock(&sdata->local->mtx);
1972
1973 if (sdata->local->tmp_channel || sdata->local->scanning) {
1974 mutex_unlock(&sdata->local->mtx);
1975 goto out;
1976 }
1977
e87cc472 1978 if (beacon)
bdcbd8e0 1979 mlme_dbg_ratelimited(sdata,
112c31f0 1980 "detected beacon loss from AP - probing\n");
bdcbd8e0 1981
6efb71b0
HS		 1982 ieee80211_cqm_rssi_notify(&sdata->vif,
1983 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1984
b291ba11
JB		 1985 /*
1986 * The driver/our work has already reported this event or the
1987 * connection monitoring has kicked in and we have already sent
1988 * a probe request. Or maybe the AP died and the driver keeps
1989 * reporting until we disassociate...
1990 *
1991 * In either case we have to ignore the current call to this
1992 * function (except for setting the correct probe reason bit)
1993 * because otherwise we would reset the timer every time and
1994 * never check whether we received a probe response!
1995 */
1996 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1997 IEEE80211_STA_CONNECTION_POLL))
1998 already = true;
1999
2000 if (beacon)
2001 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2002 else
2003 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2004
133d40f9
SG		 2005 mutex_unlock(&sdata->local->mtx);
2006
b291ba11
JB		 2007 if (already)
2008 goto out;
2009
4e751843
JB		 2010 mutex_lock(&sdata->local->iflist_mtx);
2011 ieee80211_recalc_ps(sdata->local, -1);
2012 mutex_unlock(&sdata->local->iflist_mtx);
2013
a43abf29
ML		 2014 ifmgd->probe_send_count = 0;
2015 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2016 out:
2017 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2018}
2019
a619a4c0
JO		 2020struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2021 struct ieee80211_vif *vif)
2022{
2023 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2025 struct cfg80211_bss *cbss;
a619a4c0
JO		 2026 struct sk_buff *skb;
2027 const u8 *ssid;
88c868c4 2028 int ssid_len;
a619a4c0
JO		 2029
2030 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2031 return NULL;
2032
2033 ASSERT_MGD_MTX(ifmgd);
2034
d9b3b28b
EP		 2035 if (ifmgd->associated)
2036 cbss = ifmgd->associated;
2037 else if (ifmgd->auth_data)
2038 cbss = ifmgd->auth_data->bss;
2039 else if (ifmgd->assoc_data)
2040 cbss = ifmgd->assoc_data->bss;
2041 else
a619a4c0
JO		 2042 return NULL;
2043
9caf0364 2044 rcu_read_lock();
d9b3b28b 2045 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2046 if (WARN_ON_ONCE(ssid == NULL))
2047 ssid_len = 0;
2048 else
2049 ssid_len = ssid[1];
2050
d9b3b28b 2051 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2052 (u32) -1, cbss->channel,
6b77863b 2053 ssid + 2, ssid_len,
85a237fe 2054 NULL, 0, true);
9caf0364 2055 rcu_read_unlock();
a619a4c0
JO		 2056
2057 return skb;
2058}
2059EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2060
eef9e54c 2061static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2062{
2063 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2064 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2065
2066 mutex_lock(&ifmgd->mtx);
2067 if (!ifmgd->associated) {
2068 mutex_unlock(&ifmgd->mtx);
2069 return;
2070 }
2071
37ad3888
JB		 2072 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2073 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2074 true, frame_buf);
882a7c69 2075 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2076 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2077 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2078 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2079 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2080
1e4dcd01
JO		 2081 /*
2082 * must be outside lock due to cfg80211,
2083 * but that's not a problem.
2084 */
6ae16775 2085 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2086}
2087
cc74c0c7 2088static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2089{
2090 struct ieee80211_sub_if_data *sdata =
2091 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2092 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2094 struct sta_info *sta;
2095
2096 if (ifmgd->associated) {
30fa9047 2097 rcu_read_lock();
a85e1d55
PS		 2098 sta = sta_info_get(sdata, ifmgd->bssid);
2099 if (sta)
2100 sta->beacon_loss_count++;
30fa9047 2101 rcu_read_unlock();
a85e1d55 2102 }
b291ba11 2103
682bd38b 2104 if (ifmgd->connection_loss) {
882a7c69
JB		 2105 sdata_info(sdata, "Connection to AP %pM lost\n",
2106 ifmgd->bssid);
eef9e54c 2107 __ieee80211_disconnect(sdata);
882a7c69 2108 } else {
1e4dcd01 2109 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2110 }
2111}
2112
2113static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2114{
2115 struct ieee80211_sub_if_data *sdata =
2116 container_of(work, struct ieee80211_sub_if_data,
2117 u.mgd.csa_connection_drop_work);
2118
eef9e54c 2119 __ieee80211_disconnect(sdata);
b291ba11
JB		 2120}
2121
04de8381
KV		 2122void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2123{
2124 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2125 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2126
b5878a2d
JB		 2127 trace_api_beacon_loss(sdata);
2128
1e4dcd01 2129 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2130 sdata->u.mgd.connection_loss = false;
1e4dcd01 2131 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2132}
2133EXPORT_SYMBOL(ieee80211_beacon_loss);
2134
1e4dcd01
JO		 2135void ieee80211_connection_loss(struct ieee80211_vif *vif)
2136{
2137 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2138 struct ieee80211_hw *hw = &sdata->local->hw;
2139
b5878a2d
JB		 2140 trace_api_connection_loss(sdata);
2141
682bd38b 2142 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2143 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2144}
2145EXPORT_SYMBOL(ieee80211_connection_loss);
2146
2147
66e67e41
JB		 2148static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2149 bool assoc)
2150{
2151 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2152
2153 lockdep_assert_held(&sdata->u.mgd.mtx);
2154
66e67e41
JB		 2155 if (!assoc) {
2156 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2157
2158 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2159 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2160 sdata->u.mgd.flags = 0;
55de908a 2161 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2162 }
2163
5b112d3d 2164 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2165 kfree(auth_data);
2166 sdata->u.mgd.auth_data = NULL;
2167}
2168
2169static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_mgmt *mgmt, size_t len)
2171{
1672c0e3 2172 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2173 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2174 u8 *pos;
2175 struct ieee802_11_elems elems;
1672c0e3 2176 u32 tx_flags = 0;
66e67e41
JB		 2177
2178 pos = mgmt->u.auth.variable;
2179 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2180 if (!elems.challenge)
2181 return;
2182 auth_data->expected_transaction = 4;
a1845fc7 2183 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2184 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2185 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2186 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2187 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2188 elems.challenge - 2, elems.challenge_len + 2,
2189 auth_data->bss->bssid, auth_data->bss->bssid,
2190 auth_data->key, auth_data->key_len,
1672c0e3 2191 auth_data->key_idx, tx_flags);
66e67e41
JB		 2192}
2193
2194static enum rx_mgmt_action __must_check
2195ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_mgmt *mgmt, size_t len)
2197{
2198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2199 u8 bssid[ETH_ALEN];
2200 u16 auth_alg, auth_transaction, status_code;
2201 struct sta_info *sta;
2202
2203 lockdep_assert_held(&ifmgd->mtx);
2204
2205 if (len < 24 + 6)
2206 return RX_MGMT_NONE;
2207
2208 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2209 return RX_MGMT_NONE;
2210
2211 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2212
b203ca39 2213 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2214 return RX_MGMT_NONE;
2215
2216 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2217 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2218 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2219
2220 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2221 auth_transaction != ifmgd->auth_data->expected_transaction) {
2222 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2223 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2224 auth_transaction,
2225 ifmgd->auth_data->expected_transaction);
66e67e41 2226 return RX_MGMT_NONE;
0f4126e8 2227 }
66e67e41
JB		 2228
2229 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2230 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2231 mgmt->sa, status_code);
dac211ec
EP		 2232 ieee80211_destroy_auth_data(sdata, false);
2233 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2234 }
2235
2236 switch (ifmgd->auth_data->algorithm) {
2237 case WLAN_AUTH_OPEN:
2238 case WLAN_AUTH_LEAP:
2239 case WLAN_AUTH_FT:
6b8ece3a 2240 case WLAN_AUTH_SAE:
66e67e41
JB		 2241 break;
2242 case WLAN_AUTH_SHARED_KEY:
2243 if (ifmgd->auth_data->expected_transaction != 4) {
2244 ieee80211_auth_challenge(sdata, mgmt, len);
2245 /* need another frame */
2246 return RX_MGMT_NONE;
2247 }
2248 break;
2249 default:
2250 WARN_ONCE(1, "invalid auth alg %d",
2251 ifmgd->auth_data->algorithm);
2252 return RX_MGMT_NONE;
2253 }
2254
bdcbd8e0 2255 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2256 ifmgd->auth_data->done = true;
2257 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2258 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2259 run_again(ifmgd, ifmgd->auth_data->timeout);
2260
6b8ece3a
JM		 2261 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2262 ifmgd->auth_data->expected_transaction != 2) {
2263 /*
2264 * Report auth frame to user space for processing since another
2265 * round of Authentication frames is still needed.
2266 */
2267 return RX_MGMT_CFG80211_RX_AUTH;
2268 }
2269
66e67e41
JB		 2270 /* move station state to auth */
2271 mutex_lock(&sdata->local->sta_mtx);
2272 sta = sta_info_get(sdata, bssid);
2273 if (!sta) {
2274 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2275 goto out_err;
2276 }
2277 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2278 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2279 goto out_err;
2280 }
2281 mutex_unlock(&sdata->local->sta_mtx);
2282
2283 return RX_MGMT_CFG80211_RX_AUTH;
2284 out_err:
2285 mutex_unlock(&sdata->local->sta_mtx);
2286 /* ignore frame -- wait for timeout */
2287 return RX_MGMT_NONE;
2288}
2289
2290
77fdaa12
JB		 2291static enum rx_mgmt_action __must_check
2292ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2293 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2294{
46900298 2295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2296 const u8 *bssid = NULL;
f0706e82
JB		 2297 u16 reason_code;
2298
66e67e41
JB		 2299 lockdep_assert_held(&ifmgd->mtx);
2300
f4ea83dd 2301 if (len < 24 + 2)
77fdaa12 2302 return RX_MGMT_NONE;
f0706e82 2303
66e67e41 2304 if (!ifmgd->associated ||
b203ca39 2305 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2306 return RX_MGMT_NONE;
77fdaa12 2307
0c1ad2ca 2308 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2309
2310 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2311
bdcbd8e0
JB		 2312 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2313 bssid, reason_code);
77fdaa12 2314
37ad3888
JB		 2315 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2316
77fdaa12 2317 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2318}
2319
2320
77fdaa12
JB		 2321static enum rx_mgmt_action __must_check
2322ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2323 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2324{
46900298 2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2326 u16 reason_code;
2327
66e67e41 2328 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2329
66e67e41 2330 if (len < 24 + 2)
77fdaa12
JB		 2331 return RX_MGMT_NONE;
2332
66e67e41 2333 if (!ifmgd->associated ||
b203ca39 2334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2335 return RX_MGMT_NONE;
f0706e82
JB		 2336
2337 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2338
bdcbd8e0
JB		 2339 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2340 mgmt->sa, reason_code);
f0706e82 2341
37ad3888
JB		 2342 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2343
77fdaa12 2344 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2345}
2346
c74d084f
CL		 2347static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2348 u8 *supp_rates, unsigned int supp_rates_len,
2349 u32 *rates, u32 *basic_rates,
2350 bool *have_higher_than_11mbit,
2351 int *min_rate, int *min_rate_index)
2352{
2353 int i, j;
2354
2355 for (i = 0; i < supp_rates_len; i++) {
2356 int rate = (supp_rates[i] & 0x7f) * 5;
2357 bool is_basic = !!(supp_rates[i] & 0x80);
2358
2359 if (rate > 110)
2360 *have_higher_than_11mbit = true;
2361
2362 /*
2363 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2364 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2365 *
2366 * Note: Even through the membership selector and the basic
2367 * rate flag share the same bit, they are not exactly
2368 * the same.
2369 */
2370 if (!!(supp_rates[i] & 0x80) &&
2371 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2372 continue;
2373
2374 for (j = 0; j < sband->n_bitrates; j++) {
2375 if (sband->bitrates[j].bitrate == rate) {
2376 *rates |= BIT(j);
2377 if (is_basic)
2378 *basic_rates |= BIT(j);
2379 if (rate < *min_rate) {
2380 *min_rate = rate;
2381 *min_rate_index = j;
2382 }
2383 break;
2384 }
2385 }
2386 }
2387}
f0706e82 2388
66e67e41
JB		 2389static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2390 bool assoc)
2391{
2392 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2393
2394 lockdep_assert_held(&sdata->u.mgd.mtx);
2395
66e67e41
JB		 2396 if (!assoc) {
2397 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2398
2399 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2400 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2401 sdata->u.mgd.flags = 0;
55de908a 2402 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2403 }
2404
2405 kfree(assoc_data);
2406 sdata->u.mgd.assoc_data = NULL;
2407}
2408
2409static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2410 struct cfg80211_bss *cbss,
af6b6374 2411 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2412{
46900298 2413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2414 struct ieee80211_local *local = sdata->local;
8318d78a 2415 struct ieee80211_supported_band *sband;
f0706e82 2416 struct sta_info *sta;
af6b6374 2417 u8 *pos;
af6b6374 2418 u16 capab_info, aid;
f0706e82 2419 struct ieee802_11_elems elems;
bda3933a 2420 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2421 u32 changed = 0;
c74d084f 2422 int err;
f0706e82 2423
af6b6374 2424 /* AssocResp and ReassocResp have identical structure */
f0706e82 2425
f0706e82 2426 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2427 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2428
1dd84aa2 2429 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2430 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2431 aid);
1dd84aa2
JB		 2432 aid &= ~(BIT(15) | BIT(14));
2433
05cb9108
JB		 2434 ifmgd->broken_ap = false;
2435
2436 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2437 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2438 aid);
05cb9108
JB		 2439 aid = 0;
2440 ifmgd->broken_ap = true;
2441 }
2442
af6b6374
JB		 2443 pos = mgmt->u.assoc_resp.variable;
2444 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2445
f0706e82 2446 if (!elems.supp_rates) {
bdcbd8e0 2447 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2448 return false;
f0706e82
JB		 2449 }
2450
46900298 2451 ifmgd->aid = aid;
f0706e82 2452
30eb1dc2
JB		 2453 /*
2454 * We previously checked these in the beacon/probe response, so
2455 * they should be present here. This is just a safety net.
2456 */
2457 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2458 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2459 sdata_info(sdata,
2460 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2461 return false;
2462 }
2463
2464 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2465 (!elems.vht_cap_elem || !elems.vht_operation)) {
2466 sdata_info(sdata,
2467 "VHT AP is missing VHT capability/operation in AssocResp\n");
2468 return false;
2469 }
2470
2a33bee2
GE		 2471 mutex_lock(&sdata->local->sta_mtx);
2472 /*
2473 * station info was already allocated and inserted before
2474 * the association and should be available to us
2475 */
7852e361 2476 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2477 if (WARN_ON(!sta)) {
2478 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2479 return false;
77fdaa12 2480 }
05e5e883 2481
55de908a 2482 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2483
30eb1dc2 2484 /* Set up internal HT/VHT capabilities */
a8243b72 2485 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2486 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2487 elems.ht_cap_elem, sta);
64f68e5d 2488
818255ea
MP		 2489 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2490 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2491 elems.vht_cap_elem, sta);
818255ea 2492
30eb1dc2
JB		 2493 /*
2494 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2495 * in their association response, so ignore that data for our own
2496 * configuration. If it changed since the last beacon, we'll get the
2497 * next beacon and update then.
2498 */
1128958d 2499
bee7f586
JB		 2500 /*
2501 * If an operating mode notification IE is present, override the
2502 * NSS calculation (that would be done in rate_control_rate_init())
2503 * and use the # of streams from that element.
2504 */
2505 if (elems.opmode_notif &&
2506 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2507 u8 nss;
2508
2509 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2510 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2511 nss += 1;
2512 sta->sta.rx_nss = nss;
2513 }
2514
4b7679a5 2515 rate_control_rate_init(sta);
f0706e82 2516
46900298 2517 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2518 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2519
ddf4ac53 2520 if (elems.wmm_param)
c2c98fde 2521 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2522
3e4d40fa 2523 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2524 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2525 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2526 if (err) {
bdcbd8e0
JB		 2527 sdata_info(sdata,
2528 "failed to move station %pM to desired state\n",
2529 sta->sta.addr);
c8987876
JB		 2530 WARN_ON(__sta_info_destroy(sta));
2531 mutex_unlock(&sdata->local->sta_mtx);
2532 return false;
2533 }
2534
7852e361 2535 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2536
f2176d72
JO		 2537 /*
2538 * Always handle WMM once after association regardless
2539 * of the first value the AP uses. Setting -1 here has
2540 * that effect because the AP values is an unsigned
2541 * 4-bit value.
2542 */
2543 ifmgd->wmm_last_param_set = -1;
2544
ddf4ac53 2545 if (elems.wmm_param)
4ced3f74 2546 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2547 elems.wmm_param_len);
aa837e1d 2548 else
3abead59
JB		 2549 ieee80211_set_wmm_default(sdata, false);
2550 changed |= BSS_CHANGED_QOS;
f0706e82 2551
60f8b39c
JB		 2552 /* set AID and assoc capability,
2553 * ieee80211_set_associated() will tell the driver */
2554 bss_conf->aid = aid;
2555 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2556 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2557
d524215f
FF		 2558 /*
2559 * If we're using 4-addr mode, let the AP know that we're
2560 * doing so, so that it can create the STA VLAN on its side
2561 */
2562 if (ifmgd->use_4addr)
2563 ieee80211_send_4addr_nullfunc(local, sdata);
2564
15b7b062 2565 /*
b291ba11
JB		 2566 * Start timer to probe the connection to the AP now.
2567 * Also start the timer that will detect beacon loss.
15b7b062 2568 */
b291ba11 2569 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2570 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2571
af6b6374 2572 return true;
f0706e82
JB		 2573}
2574
66e67e41
JB		 2575static enum rx_mgmt_action __must_check
2576ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2577 struct ieee80211_mgmt *mgmt, size_t len,
2578 struct cfg80211_bss **bss)
2579{
2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2582 u16 capab_info, status_code, aid;
2583 struct ieee802_11_elems elems;
2584 u8 *pos;
2585 bool reassoc;
2586
2587 lockdep_assert_held(&ifmgd->mtx);
2588
2589 if (!assoc_data)
2590 return RX_MGMT_NONE;
b203ca39 2591 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2592 return RX_MGMT_NONE;
2593
2594 /*
2595 * AssocResp and ReassocResp have identical structure, so process both
2596 * of them in this function.
2597 */
2598
2599 if (len < 24 + 6)
2600 return RX_MGMT_NONE;
2601
2602 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2603 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2604 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2605 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2606
bdcbd8e0
JB		 2607 sdata_info(sdata,
2608 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2609 reassoc ? "Rea" : "A", mgmt->sa,
2610 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2611
2612 pos = mgmt->u.assoc_resp.variable;
2613 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2614
2615 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2616 elems.timeout_int && elems.timeout_int_len == 5 &&
2617 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2618 u32 tu, ms;
2619 tu = get_unaligned_le32(elems.timeout_int + 1);
2620 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2621 sdata_info(sdata,
2622 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2623 mgmt->sa, tu, ms);
66e67e41 2624 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2625 assoc_data->timeout_started = true;
66e67e41
JB		 2626 if (ms > IEEE80211_ASSOC_TIMEOUT)
2627 run_again(ifmgd, assoc_data->timeout);
2628 return RX_MGMT_NONE;
2629 }
2630
2631 *bss = assoc_data->bss;
2632
2633 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2634 sdata_info(sdata, "%pM denied association (code=%d)\n",
2635 mgmt->sa, status_code);
66e67e41
JB		 2636 ieee80211_destroy_assoc_data(sdata, false);
2637 } else {
66e67e41
JB		 2638 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2639 /* oops -- internal error -- send timeout for now */
10a9109f 2640 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2641 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2642 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2643 }
635d999f 2644 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2645
2646 /*
2647 * destroy assoc_data afterwards, as otherwise an idle
2648 * recalc after assoc_data is NULL but before associated
2649 * is set can cause the interface to go idle
2650 */
2651 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2652 }
2653
2654 return RX_MGMT_CFG80211_RX_ASSOC;
2655}
8e3c1b77 2656
98c8fccf 2657static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2658 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2659 struct ieee80211_rx_status *rx_status,
d45c4172 2660 struct ieee802_11_elems *elems)
98c8fccf
JB		 2661{
2662 struct ieee80211_local *local = sdata->local;
2663 int freq;
c2b13452 2664 struct ieee80211_bss *bss;
98c8fccf 2665 struct ieee80211_channel *channel;
56007a02
JB		 2666 bool need_ps = false;
2667
826262c3
JB		 2668 if ((sdata->u.mgd.associated &&
2669 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2670 (sdata->u.mgd.assoc_data &&
2671 ether_addr_equal(mgmt->bssid,
2672 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2673 /* not previously set so we may need to recalc */
826262c3
JB		 2674 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2675
2676 if (elems->tim && !elems->parse_error) {
4a3cb702 2677 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2678 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2679 }
56007a02 2680 }
98c8fccf
JB		 2681
2682 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2683 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2684 rx_status->band);
98c8fccf
JB		 2685 else
2686 freq = rx_status->freq;
2687
2688 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2689
2690 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2691 return;
2692
98c8fccf 2693 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2694 channel);
77fdaa12
JB		 2695 if (bss)
2696 ieee80211_rx_bss_put(local, bss);
2697
2698 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2699 return;
2700
56007a02
JB		 2701 if (need_ps) {
2702 mutex_lock(&local->iflist_mtx);
2703 ieee80211_recalc_ps(local, -1);
2704 mutex_unlock(&local->iflist_mtx);
2705 }
2706
5bc1420b
JB		 2707 if (elems->ch_switch_ie &&
2708 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2709 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2710 bss, rx_status->mactime);
f0706e82
JB		 2711}
2712
2713
f698d856 2714static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2715 struct sk_buff *skb)
f0706e82 2716{
af6b6374 2717 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2718 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2719 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2720 size_t baselen, len = skb->len;
ae6a44e3
EK		 2721 struct ieee802_11_elems elems;
2722
15b7b062
KV		 2723 ifmgd = &sdata->u.mgd;
2724
77fdaa12
JB		 2725 ASSERT_MGD_MTX(ifmgd);
2726
b203ca39 2727 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2728 return; /* ignore ProbeResp to foreign address */
2729
ae6a44e3
EK		 2730 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2731 if (baselen > len)
2732 return;
2733
2734 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2735 &elems);
2736
d45c4172 2737 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2738
77fdaa12 2739 if (ifmgd->associated &&
b203ca39 2740 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2741 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2742
2743 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2744 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2745 /* got probe response, continue with auth */
bdcbd8e0 2746 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2747 ifmgd->auth_data->tries = 0;
2748 ifmgd->auth_data->timeout = jiffies;
89afe614 2749 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2750 run_again(ifmgd, ifmgd->auth_data->timeout);
2751 }
f0706e82
JB		 2752}
2753
d91f36db
JB		 2754/*
2755 * This is the canonical list of information elements we care about,
2756 * the filter code also gives us all changes to the Microsoft OUI
2757 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2758 *
2759 * We implement beacon filtering in software since that means we can
2760 * avoid processing the frame here and in cfg80211, and userspace
2761 * will not be able to tell whether the hardware supports it or not.
2762 *
2763 * XXX: This list needs to be dynamic -- userspace needs to be able to
2764 * add items it requires. It also needs to be able to tell us to
2765 * look out for other vendor IEs.
2766 */
2767static const u64 care_about_ies =
1d4df3a5
JB		 2768 (1ULL << WLAN_EID_COUNTRY) |
2769 (1ULL << WLAN_EID_ERP_INFO) |
2770 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2771 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2772 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2773 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2774
30eb1dc2
JB		 2775static enum rx_mgmt_action
2776ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2777 struct ieee80211_mgmt *mgmt, size_t len,
2778 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2779{
d91f36db 2780 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2781 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2782 size_t baselen;
2783 struct ieee802_11_elems elems;
f698d856 2784 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2785 struct ieee80211_chanctx_conf *chanctx_conf;
2786 struct ieee80211_channel *chan;
bee7f586 2787 struct sta_info *sta;
471b3efd 2788 u32 changed = 0;
f87ad637 2789 bool erp_valid;
7a5158ef 2790 u8 erp_value = 0;
d91f36db 2791 u32 ncrc;
77fdaa12
JB		 2792 u8 *bssid;
2793
66e67e41 2794 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2795
ae6a44e3
EK		 2796 /* Process beacon from the current BSS */
2797 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2798 if (baselen > len)
30eb1dc2 2799 return RX_MGMT_NONE;
ae6a44e3 2800
55de908a
JB		 2801 rcu_read_lock();
2802 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2803 if (!chanctx_conf) {
2804 rcu_read_unlock();
30eb1dc2 2805 return RX_MGMT_NONE;
55de908a
JB		 2806 }
2807
4bf88530 2808 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2809 rcu_read_unlock();
30eb1dc2 2810 return RX_MGMT_NONE;
55de908a 2811 }
4bf88530 2812 chan = chanctx_conf->def.chan;
55de908a 2813 rcu_read_unlock();
f0706e82 2814
c65dd147 2815 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2816 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2817 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2818 len - baselen, &elems);
77fdaa12 2819
d45c4172 2820 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2821 ifmgd->assoc_data->have_beacon = true;
c65dd147 2822 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2823 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2824 sdata->vif.bss_conf.sync_tsf =
2825 le64_to_cpu(mgmt->u.beacon.timestamp);
2826 sdata->vif.bss_conf.sync_device_ts =
2827 rx_status->device_timestamp;
2828 if (elems.tim)
2829 sdata->vif.bss_conf.sync_dtim_count =
2830 elems.tim->dtim_count;
2831 else
2832 sdata->vif.bss_conf.sync_dtim_count = 0;
2833 }
66e67e41
JB		 2834 /* continue assoc process */
2835 ifmgd->assoc_data->timeout = jiffies;
89afe614 2836 ifmgd->assoc_data->timeout_started = true;
66e67e41 2837 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2838 return RX_MGMT_NONE;
66e67e41 2839 }
77fdaa12 2840
66e67e41 2841 if (!ifmgd->associated ||
b203ca39 2842 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2843 return RX_MGMT_NONE;
66e67e41 2844 bssid = ifmgd->associated->bssid;
f0706e82 2845
17e4ec14
JM		 2846 /* Track average RSSI from the Beacon frames of the current AP */
2847 ifmgd->last_beacon_signal = rx_status->signal;
2848 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2849 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2850 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2851 ifmgd->last_cqm_event_signal = 0;
391a200a 2852 ifmgd->count_beacon_signal = 1;
615f7b9b 2853 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2854 } else {
2855 ifmgd->ave_beacon_signal =
2856 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2857 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2858 ifmgd->ave_beacon_signal) / 16;
391a200a 2859 ifmgd->count_beacon_signal++;
17e4ec14 2860 }
615f7b9b
MV		 2861
2862 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2863 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2864 int sig = ifmgd->ave_beacon_signal;
2865 int last_sig = ifmgd->last_ave_beacon_signal;
2866
2867 /*
2868 * if signal crosses either of the boundaries, invoke callback
2869 * with appropriate parameters
2870 */
2871 if (sig > ifmgd->rssi_max_thold &&
2872 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2873 ifmgd->last_ave_beacon_signal = sig;
887da917 2874 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2875 } else if (sig < ifmgd->rssi_min_thold &&
2876 (last_sig >= ifmgd->rssi_max_thold ||
2877 last_sig == 0)) {
2878 ifmgd->last_ave_beacon_signal = sig;
887da917 2879 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2880 }
2881 }
2882
17e4ec14 2883 if (bss_conf->cqm_rssi_thold &&
391a200a 2884 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2885 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2886 int sig = ifmgd->ave_beacon_signal / 16;
2887 int last_event = ifmgd->last_cqm_event_signal;
2888 int thold = bss_conf->cqm_rssi_thold;
2889 int hyst = bss_conf->cqm_rssi_hyst;
2890 if (sig < thold &&
2891 (last_event == 0 || sig < last_event - hyst)) {
2892 ifmgd->last_cqm_event_signal = sig;
2893 ieee80211_cqm_rssi_notify(
2894 &sdata->vif,
2895 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2896 GFP_KERNEL);
2897 } else 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_HIGH,
2903 GFP_KERNEL);
2904 }
2905 }
2906
b291ba11 2907 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2908 mlme_dbg_ratelimited(sdata,
112c31f0 2909 "cancelling AP probe due to a received beacon\n");
925e64c3 2910 mutex_lock(&local->mtx);
b291ba11 2911 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2912 ieee80211_run_deferred_scan(local);
2913 mutex_unlock(&local->mtx);
2914
4e751843
JB		 2915 mutex_lock(&local->iflist_mtx);
2916 ieee80211_recalc_ps(local, -1);
2917 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2918 }
2919
b291ba11
JB		 2920 /*
2921 * Push the beacon loss detection into the future since
2922 * we are processing a beacon from the AP just now.
2923 */
d3a910a8 2924 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2925
d91f36db
JB		 2926 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2927 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2928 len - baselen, &elems,
2929 care_about_ies, ncrc);
2930
25c9c875 2931 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2932 bool directed_tim = ieee80211_check_tim(elems.tim,
2933 elems.tim_len,
2934 ifmgd->aid);
1fb3606b 2935 if (directed_tim) {
572e0012 2936 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2937 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2938 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2939 ieee80211_hw_config(local,
2940 IEEE80211_CONF_CHANGE_PS);
2941 }
572e0012 2942 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2943 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2944 local->pspolling = true;
2945
2946 /*
2947 * Here is assumed that the driver will be
2948 * able to send ps-poll frame and receive a
2949 * response even though power save mode is
2950 * enabled, but some drivers might require
2951 * to disable power save here. This needs
2952 * to be investigated.
2953 */
2954 ieee80211_send_pspoll(local, sdata);
2955 }
a97b77b9
VN		 2956 }
2957 }
7a5158ef 2958
488dd7b5
JB		 2959 if (sdata->vif.p2p) {
2960 u8 noa[2];
2961 int ret;
2962
2963 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2964 len - baselen,
2965 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2966 noa, sizeof(noa));
2967 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2968 bss_conf->p2p_oppps = noa[1] & 0x80;
2969 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2970 changed |= BSS_CHANGED_P2P_PS;
2971 sdata->u.mgd.p2p_noa_index = noa[0];
2972 /*
2973 * make sure we update all information, the CRC
2974 * mechanism doesn't look at P2P attributes.
2975 */
2976 ifmgd->beacon_crc_valid = false;
2977 }
2978 }
2979
d8ec4433 2980 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2981 return RX_MGMT_NONE;
30196673 2982 ifmgd->beacon_crc = ncrc;
d8ec4433 2983 ifmgd->beacon_crc_valid = true;
30196673 2984
d45c4172 2985 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2986
2987 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2988 elems.wmm_param_len))
2989 changed |= BSS_CHANGED_QOS;
2990
c65dd147
EG		 2991 /*
2992 * If we haven't had a beacon before, tell the driver about the
ef429dad 2993 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2994 */
2995 if (!bss_conf->dtim_period) {
2996 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2997 if (elems.tim)
2998 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2999 else
3000 bss_conf->dtim_period = 1;
ef429dad
JB		 3001
3002 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3003 sdata->vif.bss_conf.sync_tsf =
3004 le64_to_cpu(mgmt->u.beacon.timestamp);
3005 sdata->vif.bss_conf.sync_device_ts =
3006 rx_status->device_timestamp;
3007 if (elems.tim)
3008 sdata->vif.bss_conf.sync_dtim_count =
3009 elems.tim->dtim_count;
3010 else
3011 sdata->vif.bss_conf.sync_dtim_count = 0;
3012 }
3013
c65dd147
EG		 3014 changed |= BSS_CHANGED_DTIM_PERIOD;
3015 }
3016
7a5158ef
JB		 3017 if (elems.erp_info && elems.erp_info_len >= 1) {
3018 erp_valid = true;
3019 erp_value = elems.erp_info[0];
3020 } else {
3021 erp_valid = false;
50c4afb9 3022 }
7a5158ef
JB		 3023 changed |= ieee80211_handle_bss_capability(sdata,
3024 le16_to_cpu(mgmt->u.beacon.capab_info),
3025 erp_valid, erp_value);
f0706e82 3026
1128958d 3027 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3028 sta = sta_info_get(sdata, bssid);
3029
30eb1dc2
JB		 3030 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3031 elems.vht_operation, bssid, &changed)) {
3032 mutex_unlock(&local->sta_mtx);
3033 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3034 WLAN_REASON_DEAUTH_LEAVING,
3035 true, deauth_buf);
3036 return RX_MGMT_CFG80211_TX_DEAUTH;
3037 }
bee7f586
JB		 3038
3039 if (sta && elems.opmode_notif)
3040 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3041 rx_status->band, true);
1128958d 3042 mutex_unlock(&local->sta_mtx);
d3c990fb 3043
04b7b2ff
JB		 3044 if (elems.country_elem && elems.pwr_constr_elem &&
3045 mgmt->u.probe_resp.capab_info &
3046 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3047 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3048 elems.country_elem,
3049 elems.country_elem_len,
3050 elems.pwr_constr_elem);
3f2355cb 3051
471b3efd 3052 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3053
3054 return RX_MGMT_NONE;
f0706e82
JB		 3055}
3056
1fa57d01
JB		 3057void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3058 struct sk_buff *skb)
f0706e82 3059{
77fdaa12 3060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3061 struct ieee80211_rx_status *rx_status;
f0706e82 3062 struct ieee80211_mgmt *mgmt;
66e67e41 3063 struct cfg80211_bss *bss = NULL;
77fdaa12 3064 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3065 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3066 u16 fc;
3067
f0706e82
JB		 3068 rx_status = (struct ieee80211_rx_status *) skb->cb;
3069 mgmt = (struct ieee80211_mgmt *) skb->data;
3070 fc = le16_to_cpu(mgmt->frame_control);
3071
77fdaa12
JB		 3072 mutex_lock(&ifmgd->mtx);
3073
66e67e41
JB		 3074 switch (fc & IEEE80211_FCTL_STYPE) {
3075 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3076 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3077 deauth_buf, rx_status);
66e67e41
JB		 3078 break;
3079 case IEEE80211_STYPE_PROBE_RESP:
3080 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3081 break;
3082 case IEEE80211_STYPE_AUTH:
3083 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3084 break;
3085 case IEEE80211_STYPE_DEAUTH:
3086 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3087 break;
3088 case IEEE80211_STYPE_DISASSOC:
3089 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3090 break;
3091 case IEEE80211_STYPE_ASSOC_RESP:
3092 case IEEE80211_STYPE_REASSOC_RESP:
3093 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3094 break;
3095 case IEEE80211_STYPE_ACTION:
3096 switch (mgmt->u.action.category) {
3097 case WLAN_CATEGORY_SPECTRUM_MGMT:
3098 ieee80211_sta_process_chanswitch(sdata,
3099 &mgmt->u.action.u.chan_switch.sw_elem,
3100 (void *)ifmgd->associated->priv,
3101 rx_status->mactime);
77fdaa12 3102 break;
77fdaa12 3103 }
77fdaa12 3104 }
77fdaa12
JB		 3105 mutex_unlock(&ifmgd->mtx);
3106
66e67e41
JB		 3107 switch (rma) {
3108 case RX_MGMT_NONE:
3109 /* no action */
3110 break;
3111 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3112 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3113 break;
3114 case RX_MGMT_CFG80211_DISASSOC:
3115 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3116 break;
3117 case RX_MGMT_CFG80211_RX_AUTH:
3118 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3119 break;
3120 case RX_MGMT_CFG80211_RX_ASSOC:
3121 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3122 break;
3123 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3124 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3125 break;
30eb1dc2
JB		 3126 case RX_MGMT_CFG80211_TX_DEAUTH:
3127 cfg80211_send_deauth(sdata->dev, deauth_buf,
3128 sizeof(deauth_buf));
3129 break;
66e67e41
JB		 3130 default:
3131 WARN(1, "unexpected: %d", rma);
b054b747 3132 }
f0706e82
JB		 3133}
3134
9c6bd790 3135static void ieee80211_sta_timer(unsigned long data)
f0706e82 3136{
60f8b39c
JB		 3137 struct ieee80211_sub_if_data *sdata =
3138 (struct ieee80211_sub_if_data *) data;
5bb644a0 3139
9b7d72c1 3140 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3141}
3142
04ac3c0e 3143static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3144 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3145{
04ac3c0e 3146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3148
37ad3888 3149 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3150 tx, frame_buf);
04ac3c0e 3151 mutex_unlock(&ifmgd->mtx);
37ad3888 3152
04ac3c0e
FF		 3153 /*
3154 * must be outside lock due to cfg80211,
3155 * but that's not a problem.
3156 */
6ae16775 3157 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3158
04ac3c0e
FF		 3159 mutex_lock(&ifmgd->mtx);
3160}
3161
66e67e41
JB		 3162static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3163{
3164 struct ieee80211_local *local = sdata->local;
3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3166 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3167 u32 tx_flags = 0;
66e67e41
JB		 3168
3169 lockdep_assert_held(&ifmgd->mtx);
3170
3171 if (WARN_ON_ONCE(!auth_data))
3172 return -EINVAL;
3173
1672c0e3
JB		 3174 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3175 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3176 IEEE80211_TX_INTFL_MLME_CONN_TX;
3177
66e67e41
JB		 3178 auth_data->tries++;
3179
3180 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3181 sdata_info(sdata, "authentication with %pM timed out\n",
3182 auth_data->bss->bssid);
66e67e41
JB		 3183
3184 /*
3185 * Most likely AP is not in the range so remove the
3186 * bss struct for that AP.
3187 */
3188 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3189
3190 return -ETIMEDOUT;
3191 }
3192
a1845fc7
JB		 3193 drv_mgd_prepare_tx(local, sdata);
3194
66e67e41 3195 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3196 u16 trans = 1;
3197 u16 status = 0;
3198
bdcbd8e0
JB		 3199 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3200 auth_data->bss->bssid, auth_data->tries,
3201 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3202
3203 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3204
3205 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3206 trans = auth_data->sae_trans;
3207 status = auth_data->sae_status;
3208 auth_data->expected_transaction = trans;
3209 }
3210
3211 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3212 auth_data->data, auth_data->data_len,
66e67e41 3213 auth_data->bss->bssid,
1672c0e3
JB		 3214 auth_data->bss->bssid, NULL, 0, 0,
3215 tx_flags);
66e67e41
JB		 3216 } else {
3217 const u8 *ssidie;
3218
bdcbd8e0
JB		 3219 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3220 auth_data->bss->bssid, auth_data->tries,
3221 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3222
9caf0364 3223 rcu_read_lock();
66e67e41 3224 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3225 if (!ssidie) {
3226 rcu_read_unlock();
66e67e41 3227 return -EINVAL;
9caf0364 3228 }
66e67e41
JB		 3229 /*
3230 * Direct probe is sent to broadcast address as some APs
3231 * will not answer to direct packet in unassociated state.
3232 */
3233 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3234 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3235 auth_data->bss->channel, false);
9caf0364 3236 rcu_read_unlock();
66e67e41
JB		 3237 }
3238
1672c0e3
JB		 3239 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3240 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3241 ifmgd->auth_data->timeout_started = true;
1672c0e3 3242 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3243 } else {
3244 auth_data->timeout_started = false;
1672c0e3 3245 }
66e67e41
JB		 3246
3247 return 0;
3248}
3249
3250static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3251{
3252 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3253 struct ieee80211_local *local = sdata->local;
3254
3255 lockdep_assert_held(&sdata->u.mgd.mtx);
3256
66e67e41
JB		 3257 assoc_data->tries++;
3258 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3259 sdata_info(sdata, "association with %pM timed out\n",
3260 assoc_data->bss->bssid);
66e67e41
JB		 3261
3262 /*
3263 * Most likely AP is not in the range so remove the
3264 * bss struct for that AP.
3265 */
3266 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3267
3268 return -ETIMEDOUT;
3269 }
3270
bdcbd8e0
JB		 3271 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3272 assoc_data->bss->bssid, assoc_data->tries,
3273 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3274 ieee80211_send_assoc(sdata);
3275
1672c0e3
JB		 3276 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3277 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3278 assoc_data->timeout_started = true;
1672c0e3 3279 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3280 } else {
3281 assoc_data->timeout_started = false;
1672c0e3 3282 }
66e67e41
JB		 3283
3284 return 0;
3285}
3286
1672c0e3
JB		 3287void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3288 __le16 fc, bool acked)
3289{
3290 struct ieee80211_local *local = sdata->local;
3291
3292 sdata->u.mgd.status_fc = fc;
3293 sdata->u.mgd.status_acked = acked;
3294 sdata->u.mgd.status_received = true;
3295
3296 ieee80211_queue_work(&local->hw, &sdata->work);
3297}
3298
1fa57d01 3299void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3300{
9c6bd790 3301 struct ieee80211_local *local = sdata->local;
1fa57d01 3302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3303
77fdaa12
JB		 3304 mutex_lock(&ifmgd->mtx);
3305
1672c0e3
JB		 3306 if (ifmgd->status_received) {
3307 __le16 fc = ifmgd->status_fc;
3308 bool status_acked = ifmgd->status_acked;
3309
3310 ifmgd->status_received = false;
3311 if (ifmgd->auth_data &&
3312 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3313 if (status_acked) {
3314 ifmgd->auth_data->timeout =
3315 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3316 run_again(ifmgd, ifmgd->auth_data->timeout);
3317 } else {
3318 ifmgd->auth_data->timeout = jiffies - 1;
3319 }
89afe614 3320 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3321 } else if (ifmgd->assoc_data &&
3322 (ieee80211_is_assoc_req(fc) ||
3323 ieee80211_is_reassoc_req(fc))) {
3324 if (status_acked) {
3325 ifmgd->assoc_data->timeout =
3326 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3327 run_again(ifmgd, ifmgd->assoc_data->timeout);
3328 } else {
3329 ifmgd->assoc_data->timeout = jiffies - 1;
3330 }
89afe614 3331 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3332 }
3333 }
3334
89afe614 3335 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3336 time_after(jiffies, ifmgd->auth_data->timeout)) {
3337 if (ifmgd->auth_data->done) {
3338 /*
3339 * ok ... we waited for assoc but userspace didn't,
3340 * so let's just kill the auth data
3341 */
3342 ieee80211_destroy_auth_data(sdata, false);
3343 } else if (ieee80211_probe_auth(sdata)) {
3344 u8 bssid[ETH_ALEN];
3345
3346 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3347
3348 ieee80211_destroy_auth_data(sdata, false);
3349
3350 mutex_unlock(&ifmgd->mtx);
3351 cfg80211_send_auth_timeout(sdata->dev, bssid);
3352 mutex_lock(&ifmgd->mtx);
3353 }
89afe614 3354 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3355 run_again(ifmgd, ifmgd->auth_data->timeout);
3356
89afe614 3357 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3358 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3359 if ((ifmgd->assoc_data->need_beacon &&
3360 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3361 ieee80211_do_assoc(sdata)) {
3362 u8 bssid[ETH_ALEN];
3363
3364 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3365
3366 ieee80211_destroy_assoc_data(sdata, false);
3367
3368 mutex_unlock(&ifmgd->mtx);
3369 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3370 mutex_lock(&ifmgd->mtx);
3371 }
89afe614 3372 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3373 run_again(ifmgd, ifmgd->assoc_data->timeout);
3374
b291ba11
JB		 3375 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3376 IEEE80211_STA_CONNECTION_POLL) &&
3377 ifmgd->associated) {
a43abf29 3378 u8 bssid[ETH_ALEN];
72a8a3ed 3379 int max_tries;
a43abf29 3380
0c1ad2ca 3381 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3382
72a8a3ed 3383 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3384 max_tries = max_nullfunc_tries;
72a8a3ed 3385 else
180205bd 3386 max_tries = max_probe_tries;
72a8a3ed 3387
4e5ff376
FF		 3388 /* ACK received for nullfunc probing frame */
3389 if (!ifmgd->probe_send_count)
3390 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3391 else if (ifmgd->nullfunc_failed) {
3392 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3393 mlme_dbg(sdata,
3394 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3395 bssid, ifmgd->probe_send_count,
3396 max_tries);
04ac3c0e
FF		 3397 ieee80211_mgd_probe_ap_send(sdata);
3398 } else {
bdcbd8e0
JB		 3399 mlme_dbg(sdata,
3400 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3401 bssid);
95acac61 3402 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3403 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3404 false);
04ac3c0e
FF		 3405 }
3406 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3407 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3408 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3409 mlme_dbg(sdata,
3410 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3411 bssid, probe_wait_ms);
95acac61 3412 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3413 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3414 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3415 mlme_dbg(sdata,
3416 "No probe response from AP %pM after %dms, try %d/%i\n",
3417 bssid, probe_wait_ms,
3418 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3419 ieee80211_mgd_probe_ap_send(sdata);
3420 } else {
b291ba11
JB		 3421 /*
3422 * We actually lost the connection ... or did we?
3423 * Let's make sure!
3424 */
b38afa87
BG		 3425 wiphy_debug(local->hw.wiphy,
3426 "%s: No probe response from AP %pM"
3427 " after %dms, disconnecting.\n",
3428 sdata->name,
180205bd 3429 bssid, probe_wait_ms);
04ac3c0e 3430
95acac61 3431 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3433 }
3434 }
3435
77fdaa12 3436 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3437}
3438
b291ba11
JB		 3439static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3440{
3441 struct ieee80211_sub_if_data *sdata =
3442 (struct ieee80211_sub_if_data *) data;
3443 struct ieee80211_local *local = sdata->local;
3444
3445 if (local->quiescing)
3446 return;
3447
682bd38b 3448 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3449 ieee80211_queue_work(&sdata->local->hw,
3450 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3451}
3452
3453static void ieee80211_sta_conn_mon_timer(unsigned long data)
3454{
3455 struct ieee80211_sub_if_data *sdata =
3456 (struct ieee80211_sub_if_data *) data;
3457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3458 struct ieee80211_local *local = sdata->local;
3459
3460 if (local->quiescing)
3461 return;
3462
42935eca 3463 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3464}
3465
3466static void ieee80211_sta_monitor_work(struct work_struct *work)
3467{
3468 struct ieee80211_sub_if_data *sdata =
3469 container_of(work, struct ieee80211_sub_if_data,
3470 u.mgd.monitor_work);
3471
3472 ieee80211_mgd_probe_ap(sdata, false);
3473}
3474
9c6bd790
JB		 3475static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3476{
494f1fe5
EP		 3477 u32 flags;
3478
ad935687 3479 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3480 __ieee80211_stop_poll(sdata);
ad935687 3481
b291ba11 3482 /* let's probe the connection once */
494f1fe5
EP		 3483 flags = sdata->local->hw.flags;
3484 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3485 ieee80211_queue_work(&sdata->local->hw,
3486 &sdata->u.mgd.monitor_work);
b291ba11 3487 /* and do all the other regular work too */
64592c8f 3488 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3489 }
9c6bd790 3490}
f0706e82 3491
9c6bd790
JB		 3492/* interface setup */
3493void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3494{
46900298 3495 struct ieee80211_if_managed *ifmgd;
988c0f72 3496
46900298 3497 ifmgd = &sdata->u.mgd;
b291ba11 3498 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3499 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3500 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3501 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3502 INIT_WORK(&ifmgd->csa_connection_drop_work,
3503 ieee80211_csa_connection_drop_work);
d1f5b7a3 3504 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3505 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3506 (unsigned long) sdata);
b291ba11
JB		 3507 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3508 (unsigned long) sdata);
3509 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3510 (unsigned long) sdata);
46900298 3511 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3512 (unsigned long) sdata);
9c6bd790 3513
ab1faead 3514 ifmgd->flags = 0;
1478acb3 3515 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3516 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3517 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3518
77fdaa12 3519 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3520
3521 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3522 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3523 else
3524 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3525}
3526
77fdaa12
JB		 3527/* scan finished notification */
3528void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3529{
31ee67a1 3530 struct ieee80211_sub_if_data *sdata;
60f8b39c 3531
77fdaa12
JB		 3532 /* Restart STA timers */
3533 rcu_read_lock();
3534 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3535 ieee80211_restart_sta_timer(sdata);
3536 rcu_read_unlock();
3537}
60f8b39c 3538
77fdaa12
JB		 3539int ieee80211_max_network_latency(struct notifier_block *nb,
3540 unsigned long data, void *dummy)
3541{
3542 s32 latency_usec = (s32) data;
3543 struct ieee80211_local *local =
3544 container_of(nb, struct ieee80211_local,
3545 network_latency_notifier);
1fa6f4af 3546
77fdaa12
JB		 3547 mutex_lock(&local->iflist_mtx);
3548 ieee80211_recalc_ps(local, latency_usec);
3549 mutex_unlock(&local->iflist_mtx);
dfe67012 3550
77fdaa12 3551 return 0;
9c6bd790
JB		 3552}
3553
f2d9d270
JB		 3554static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3555 struct cfg80211_bss *cbss)
3556{
3557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3558 const u8 *ht_cap_ie, *vht_cap_ie;
3559 const struct ieee80211_ht_cap *ht_cap;
3560 const struct ieee80211_vht_cap *vht_cap;
3561 u8 chains = 1;
3562
3563 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3564 return chains;
3565
9caf0364 3566 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3567 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3568 ht_cap = (void *)(ht_cap_ie + 2);
3569 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3570 /*
3571 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3572 * "Tx Unequal Modulation Supported" fields.
3573 */
3574 }
3575
3576 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3577 return chains;
3578
9caf0364 3579 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3580 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3581 u8 nss;
3582 u16 tx_mcs_map;
3583
3584 vht_cap = (void *)(vht_cap_ie + 2);
3585 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3586 for (nss = 8; nss > 0; nss--) {
3587 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3588 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3589 break;
3590 }
3591 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3592 chains = max(chains, nss);
3593 }
3594
3595 return chains;
3596}
3597
b17166a7
JB		 3598static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3599 struct cfg80211_bss *cbss)
a1cf775d
JB		 3600{
3601 struct ieee80211_local *local = sdata->local;
3602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3603 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3604 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3605 struct ieee80211_supported_band *sband;
4bf88530 3606 struct cfg80211_chan_def chandef;
f2d9d270 3607 int ret;
a1cf775d 3608
24398e39
JB		 3609 sband = local->hw.wiphy->bands[cbss->channel->band];
3610
f2d9d270
JB		 3611 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3612 IEEE80211_STA_DISABLE_80P80MHZ |
3613 IEEE80211_STA_DISABLE_160MHZ);
3614
9caf0364
JB		 3615 rcu_read_lock();
3616
f2d9d270
JB		 3617 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3618 sband->ht_cap.ht_supported) {
08e6effa 3619 const u8 *ht_oper_ie, *ht_cap;
24398e39 3620
9caf0364 3621 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3622 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3623 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3624
3625 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3626 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3627 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3628 ht_oper = NULL;
3629 }
24398e39
JB		 3630 }
3631
f2d9d270
JB		 3632 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3633 sband->vht_cap.vht_supported) {
08e6effa 3634 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3635
9caf0364
JB		 3636 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3637 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3638 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3639 vht_oper = (void *)(vht_oper_ie + 2);
3640 if (vht_oper && !ht_oper) {
3641 vht_oper = NULL;
bdcbd8e0 3642 sdata_info(sdata,
f2d9d270 3643 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3644 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3645 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3646 }
08e6effa
JB		 3647
3648 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3649 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3650 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3651 vht_oper = NULL;
3652 }
24398e39
JB		 3653 }
3654
f2d9d270
JB		 3655 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3656 cbss->channel,
3657 ht_oper, vht_oper,
30eb1dc2 3658 &chandef, true);
04ecd257 3659
f2d9d270
JB		 3660 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3661 local->rx_chains);
24398e39 3662
9caf0364
JB		 3663 rcu_read_unlock();
3664
04ecd257
JB		 3665 /* will change later if needed */
3666 sdata->smps_mode = IEEE80211_SMPS_OFF;
3667
f2d9d270
JB		 3668 /*
3669 * If this fails (possibly due to channel context sharing
3670 * on incompatible channels, e.g. 80+80 and 160 sharing the
3671 * same control channel) try to use a smaller bandwidth.
3672 */
3673 ret = ieee80211_vif_use_channel(sdata, &chandef,
3674 IEEE80211_CHANCTX_SHARED);
d601cd8d 3675 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3676 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3677 ret = ieee80211_vif_use_channel(sdata, &chandef,
3678 IEEE80211_CHANCTX_SHARED);
3679 }
f2d9d270 3680 return ret;
b17166a7
JB		 3681}
3682
3683static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3684 struct cfg80211_bss *cbss, bool assoc)
3685{
3686 struct ieee80211_local *local = sdata->local;
3687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3688 struct ieee80211_bss *bss = (void *)cbss->priv;
3689 struct sta_info *new_sta = NULL;
3690 bool have_sta = false;
3691 int err;
3692
3693 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3694 return -EINVAL;
3695
3696 if (assoc) {
3697 rcu_read_lock();
3698 have_sta = sta_info_get(sdata, cbss->bssid);
3699 rcu_read_unlock();
3700 }
3701
3702 if (!have_sta) {
3703 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3704 if (!new_sta)
3705 return -ENOMEM;
3706 }
3707
13e0c8e3 3708 if (new_sta) {
5d6a1b06
JB		 3709 u32 rates = 0, basic_rates = 0;
3710 bool have_higher_than_11mbit;
3711 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3712 struct ieee80211_supported_band *sband;
8cef2c9d 3713 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3714
3715 sband = local->hw.wiphy->bands[cbss->channel->band];
3716
3717 err = ieee80211_prep_channel(sdata, cbss);
3718 if (err) {
3719 sta_info_free(local, new_sta);
3720 return err;
3721 }
5d6a1b06 3722
5d6a1b06
JB		 3723 ieee80211_get_rates(sband, bss->supp_rates,
3724 bss->supp_rates_len,
3725 &rates, &basic_rates,
3726 &have_higher_than_11mbit,
3727 &min_rate, &min_rate_index);
3728
3729 /*
3730 * This used to be a workaround for basic rates missing
3731 * in the association response frame. Now that we no
3732 * longer use the basic rates from there, it probably
3733 * doesn't happen any more, but keep the workaround so
3734 * in case some *other* APs are buggy in different ways
3735 * we can connect -- with a warning.
3736 */
3737 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3738 sdata_info(sdata,
3739 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3740 basic_rates = BIT(min_rate_index);
3741 }
3742
13e0c8e3 3743 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3744 sdata->vif.bss_conf.basic_rates = basic_rates;
3745
3746 /* cf. IEEE 802.11 9.2.12 */
55de908a 3747 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3748 have_higher_than_11mbit)
3749 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3750 else
3751 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3752
3753 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3754
8c358bcd
JB		 3755 /* set timing information */
3756 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3757 rcu_read_lock();
ef429dad
JB		 3758 ies = rcu_dereference(cbss->beacon_ies);
3759 if (ies) {
3760 const u8 *tim_ie;
3761
3762 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3763 sdata->vif.bss_conf.sync_device_ts =
3764 bss->device_ts_beacon;
3765 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3766 ies->data, ies->len);
3767 if (tim_ie && tim_ie[1] >= 2)
3768 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3769 else
3770 sdata->vif.bss_conf.sync_dtim_count = 0;
3771 } else if (!(local->hw.flags &
3772 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3773 ies = rcu_dereference(cbss->proberesp_ies);
3774 /* must be non-NULL since beacon IEs were NULL */
3775 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3776 sdata->vif.bss_conf.sync_device_ts =
3777 bss->device_ts_presp;
3778 sdata->vif.bss_conf.sync_dtim_count = 0;
3779 } else {
3780 sdata->vif.bss_conf.sync_tsf = 0;
3781 sdata->vif.bss_conf.sync_device_ts = 0;
3782 sdata->vif.bss_conf.sync_dtim_count = 0;
3783 }
8cef2c9d 3784 rcu_read_unlock();
8c358bcd
JB		 3785
3786 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3787 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3788 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3789 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3790
3791 if (assoc)
13e0c8e3 3792 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3793
13e0c8e3
JB		 3794 err = sta_info_insert(new_sta);
3795 new_sta = NULL;
a1cf775d 3796 if (err) {
bdcbd8e0
JB		 3797 sdata_info(sdata,
3798 "failed to insert STA entry for the AP (error %d)\n",
3799 err);
a1cf775d
JB		 3800 return err;
3801 }
3802 } else
b203ca39 3803 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3804
3805 return 0;
3806}
3807
77fdaa12
JB		 3808/* config hooks */
3809int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3810 struct cfg80211_auth_request *req)
9c6bd790 3811{
66e67e41
JB		 3812 struct ieee80211_local *local = sdata->local;
3813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3814 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3815 u16 auth_alg;
66e67e41
JB		 3816 int err;
3817
3818 /* prepare auth data structure */
9c6bd790 3819
77fdaa12
JB		 3820 switch (req->auth_type) {
3821 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3822 auth_alg = WLAN_AUTH_OPEN;
3823 break;
3824 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3825 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3826 return -EOPNOTSUPP;
77fdaa12
JB		 3827 auth_alg = WLAN_AUTH_SHARED_KEY;
3828 break;
3829 case NL80211_AUTHTYPE_FT:
3830 auth_alg = WLAN_AUTH_FT;
3831 break;
3832 case NL80211_AUTHTYPE_NETWORK_EAP:
3833 auth_alg = WLAN_AUTH_LEAP;
3834 break;
6b8ece3a
JM		 3835 case NL80211_AUTHTYPE_SAE:
3836 auth_alg = WLAN_AUTH_SAE;
3837 break;
77fdaa12
JB		 3838 default:
3839 return -EOPNOTSUPP;
60f8b39c 3840 }
77fdaa12 3841
6b8ece3a
JM		 3842 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3843 req->ie_len, GFP_KERNEL);
66e67e41 3844 if (!auth_data)
9c6bd790 3845 return -ENOMEM;
77fdaa12 3846
66e67e41 3847 auth_data->bss = req->bss;
77fdaa12 3848
6b8ece3a
JM		 3849 if (req->sae_data_len >= 4) {
3850 __le16 *pos = (__le16 *) req->sae_data;
3851 auth_data->sae_trans = le16_to_cpu(pos[0]);
3852 auth_data->sae_status = le16_to_cpu(pos[1]);
3853 memcpy(auth_data->data, req->sae_data + 4,
3854 req->sae_data_len - 4);
3855 auth_data->data_len += req->sae_data_len - 4;
3856 }
3857
77fdaa12 3858 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3859 memcpy(&auth_data->data[auth_data->data_len],
3860 req->ie, req->ie_len);
3861 auth_data->data_len += req->ie_len;
9c6bd790 3862 }
77fdaa12 3863
fffd0934 3864 if (req->key && req->key_len) {
66e67e41
JB		 3865 auth_data->key_len = req->key_len;
3866 auth_data->key_idx = req->key_idx;
3867 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3868 }
3869
66e67e41 3870 auth_data->algorithm = auth_alg;
60f8b39c 3871
66e67e41 3872 /* try to authenticate/probe */
2a33bee2 3873
66e67e41 3874 mutex_lock(&ifmgd->mtx);
2a33bee2 3875
66e67e41
JB		 3876 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3877 ifmgd->assoc_data) {
3878 err = -EBUSY;
3879 goto err_free;
2a33bee2
GE		 3880 }
3881
66e67e41
JB		 3882 if (ifmgd->auth_data)
3883 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3884
66e67e41
JB		 3885 /* prep auth_data so we don't go into idle on disassoc */
3886 ifmgd->auth_data = auth_data;
af6b6374 3887
66e67e41 3888 if (ifmgd->associated)
37ad3888 3889 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3890
bdcbd8e0 3891 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3892
a1cf775d
JB		 3893 err = ieee80211_prep_connection(sdata, req->bss, false);
3894 if (err)
66e67e41 3895 goto err_clear;
af6b6374 3896
66e67e41
JB		 3897 err = ieee80211_probe_auth(sdata);
3898 if (err) {
66e67e41
JB		 3899 sta_info_destroy_addr(sdata, req->bss->bssid);
3900 goto err_clear;
3901 }
3902
3903 /* hold our own reference */
5b112d3d 3904 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3905 err = 0;
3906 goto out_unlock;
3907
3908 err_clear:
3d2abdfd
EP		 3909 memset(ifmgd->bssid, 0, ETH_ALEN);
3910 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3911 ifmgd->auth_data = NULL;
3912 err_free:
3913 kfree(auth_data);
3914 out_unlock:
3915 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3916
66e67e41 3917 return err;
af6b6374
JB		 3918}
3919
77fdaa12
JB		 3920int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3921 struct cfg80211_assoc_request *req)
f0706e82 3922{
66e67e41 3923 struct ieee80211_local *local = sdata->local;
77fdaa12 3924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3925 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3926 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3927 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3928 struct ieee80211_supported_band *sband;
b08fbbd8 3929 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3930 int i, err;
f0706e82 3931
66e67e41
JB		 3932 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3933 if (!assoc_data)
3934 return -ENOMEM;
3935
9caf0364
JB		 3936 rcu_read_lock();
3937 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3938 if (!ssidie) {
3939 rcu_read_unlock();
3940 kfree(assoc_data);
3941 return -EINVAL;
3942 }
3943 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3944 assoc_data->ssid_len = ssidie[1];
3945 rcu_read_unlock();
3946
77fdaa12 3947 mutex_lock(&ifmgd->mtx);
9c87ba67 3948
66e67e41 3949 if (ifmgd->associated)
37ad3888 3950 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3951
3952 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3953 err = -EBUSY;
3954 goto err_free;
af6b6374 3955 }
77fdaa12 3956
66e67e41
JB		 3957 if (ifmgd->assoc_data) {
3958 err = -EBUSY;
3959 goto err_free;
3960 }
77fdaa12 3961
66e67e41
JB		 3962 if (ifmgd->auth_data) {
3963 bool match;
3964
3965 /* keep sta info, bssid if matching */
b203ca39 3966 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3967 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3968 }
3969
66e67e41 3970 /* prepare assoc data */
19c3b830 3971
d8ec4433
JO		 3972 ifmgd->beacon_crc_valid = false;
3973
de5036aa
JB		 3974 /*
3975 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3976 * We still associate in non-HT mode (11a/b/g) if any one of these
3977 * ciphers is configured as pairwise.
3978 * We can set this to true for non-11n hardware, that'll be checked
3979 * separately along with the peer capabilities.
3980 */
1c4cb928 3981 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3982 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3983 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3984 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3985 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3986 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3987 netdev_info(sdata->dev,
d545daba 3988 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3989 }
3990 }
77fdaa12 3991
d545daba 3992 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3993 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3994 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3995 }
ef96a842 3996
dd5ecfea
JB		 3997 if (req->flags & ASSOC_REQ_DISABLE_VHT)
3998 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3999
4e74bfdb
JB		 4000 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4001 sband = local->hw.wiphy->bands[req->bss->channel->band];
4002 if (!sband->ht_cap.ht_supported ||
1c4cb928 4003 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4004 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4005 if (!bss->wmm_used)
4006 netdev_info(sdata->dev,
4007 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4008 }
4e74bfdb 4009
d545daba
MP		 4010 /* disable VHT if we don't support it or the AP doesn't use WMM */
4011 if (!sband->vht_cap.vht_supported ||
4012 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4013 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4014 if (!bss->wmm_used)
4015 netdev_info(sdata->dev,
4016 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4017 }
4018
ef96a842
BG		 4019 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4020 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4021 sizeof(ifmgd->ht_capa_mask));
4022
dd5ecfea
JB		 4023 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4024 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4025 sizeof(ifmgd->vht_capa_mask));
4026
77fdaa12 4027 if (req->ie && req->ie_len) {
66e67e41
JB		 4028 memcpy(assoc_data->ie, req->ie, req->ie_len);
4029 assoc_data->ie_len = req->ie_len;
4030 }
f679f65d 4031
66e67e41 4032 assoc_data->bss = req->bss;
f679f65d 4033
af6b6374
JB		 4034 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4035 if (ifmgd->powersave)
04ecd257 4036 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4037 else
04ecd257 4038 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4039 } else
04ecd257 4040 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4041
66e67e41 4042 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4043 assoc_data->wmm = bss->wmm_used &&
4044 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4045 assoc_data->supp_rates = bss->supp_rates;
4046 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4047
9caf0364 4048 rcu_read_lock();
9dde6423
JB		 4049 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4050 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4051 assoc_data->ap_ht_param =
4052 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4053 else
a8243b72 4054 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4055 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4056 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4057 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4058 sizeof(struct ieee80211_vht_cap));
4059 else
4060 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4061 rcu_read_unlock();
63f170e0 4062
ab13315a
KV		 4063 if (bss->wmm_used && bss->uapsd_supported &&
4064 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4065 assoc_data->uapsd = true;
ab13315a
KV		 4066 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4067 } else {
76f0303d 4068 assoc_data->uapsd = false;
ab13315a
KV		 4069 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4070 }
4071
77fdaa12 4072 if (req->prev_bssid)
66e67e41 4073 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4074
4075 if (req->use_mfp) {
4076 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4077 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4078 } else {
4079 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4080 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4081 }
4082
4083 if (req->crypto.control_port)
4084 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4085 else
4086 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4087
a621fa4d
JB		 4088 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4089 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4090
66e67e41
JB		 4091 /* kick off associate process */
4092
4093 ifmgd->assoc_data = assoc_data;
826262c3 4094 ifmgd->dtim_period = 0;
66e67e41 4095
a1cf775d
JB		 4096 err = ieee80211_prep_connection(sdata, req->bss, true);
4097 if (err)
4098 goto err_clear;
66e67e41 4099
c65dd147
EG		 4100 rcu_read_lock();
4101 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4102
c65dd147
EG		 4103 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4104 !beacon_ies) {
4105 /*
4106 * Wait up to one beacon interval ...
4107 * should this be more if we miss one?
4108 */
4109 sdata_info(sdata, "waiting for beacon from %pM\n",
4110 ifmgd->bssid);
4111 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4112 assoc_data->timeout_started = true;
c65dd147
EG		 4113 assoc_data->need_beacon = true;
4114 } else if (beacon_ies) {
4115 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4116 beacon_ies->data,
4117 beacon_ies->len);
ef429dad
JB		 4118 u8 dtim_count = 0;
4119
c65dd147
EG		 4120 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4121 const struct ieee80211_tim_ie *tim;
4122 tim = (void *)(tim_ie + 2);
4123 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4124 dtim_count = tim->dtim_count;
826262c3 4125 }
66e67e41 4126 assoc_data->have_beacon = true;
66e67e41 4127 assoc_data->timeout = jiffies;
89afe614 4128 assoc_data->timeout_started = true;
ef429dad
JB		 4129
4130 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4131 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4132 sdata->vif.bss_conf.sync_device_ts =
4133 bss->device_ts_beacon;
4134 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4135 }
c65dd147
EG		 4136 } else {
4137 assoc_data->timeout = jiffies;
89afe614 4138 assoc_data->timeout_started = true;
66e67e41 4139 }
c65dd147
EG		 4140 rcu_read_unlock();
4141
66e67e41
JB		 4142 run_again(ifmgd, assoc_data->timeout);
4143
fcff4f10
PS		 4144 if (bss->corrupt_data) {
4145 char *corrupt_type = "data";
4146 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4147 if (bss->corrupt_data &
4148 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4149 corrupt_type = "beacon and probe response";
4150 else
4151 corrupt_type = "beacon";
4152 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4153 corrupt_type = "probe response";
bdcbd8e0
JB		 4154 sdata_info(sdata, "associating with AP with corrupt %s\n",
4155 corrupt_type);
fcff4f10
PS		 4156 }
4157
66e67e41
JB		 4158 err = 0;
4159 goto out;
4160 err_clear:
3d2abdfd
EP		 4161 memset(ifmgd->bssid, 0, ETH_ALEN);
4162 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4163 ifmgd->assoc_data = NULL;
4164 err_free:
4165 kfree(assoc_data);
4166 out:
4167 mutex_unlock(&ifmgd->mtx);
4168
4169 return err;
f0706e82
JB		 4170}
4171
77fdaa12 4172int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4173 struct cfg80211_deauth_request *req)
f0706e82 4174{
46900298 4175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4176 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4177 bool tx = !req->local_state_change;
86552017 4178 bool sent_frame = false;
f0706e82 4179
77fdaa12
JB		 4180 mutex_lock(&ifmgd->mtx);
4181
bdcbd8e0
JB		 4182 sdata_info(sdata,
4183 "deauthenticating from %pM by local choice (reason=%d)\n",
4184 req->bssid, req->reason_code);
0ff71613 4185
86552017 4186 if (ifmgd->auth_data) {
8c7d857c 4187 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4188 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4189 IEEE80211_STYPE_DEAUTH,
6863255b 4190 req->reason_code, tx,
37ad3888 4191 frame_buf);
86552017
JB		 4192 ieee80211_destroy_auth_data(sdata, false);
4193 mutex_unlock(&ifmgd->mtx);
4194
4195 sent_frame = tx;
4196 goto out;
8c7d857c
EG		 4197 }
4198
86552017
JB		 4199 if (ifmgd->associated &&
4200 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4201 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4202 req->reason_code, tx, frame_buf);
4203 sent_frame = tx;
4204 }
37ad3888
JB		 4205 mutex_unlock(&ifmgd->mtx);
4206
86552017 4207 out:
86552017
JB		 4208 if (sent_frame)
4209 __cfg80211_send_deauth(sdata->dev, frame_buf,
4210 IEEE80211_DEAUTH_FRAME_LEN);
4211
f0706e82
JB		 4212 return 0;
4213}
84363e6e 4214
77fdaa12 4215int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4216 struct cfg80211_disassoc_request *req)
9c6bd790 4217{
77fdaa12 4218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4219 u8 bssid[ETH_ALEN];
6ae16775 4220 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4221
77fdaa12 4222 mutex_lock(&ifmgd->mtx);
10f644a4 4223
8d8b261a
JB		 4224 /*
4225 * cfg80211 should catch this ... but it's racy since
4226 * we can receive a disassoc frame, process it, hand it
4227 * to cfg80211 while that's in a locked section already
4228 * trying to tell us that the user wants to disconnect.
4229 */
0c1ad2ca 4230 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4231 mutex_unlock(&ifmgd->mtx);
4232 return -ENOLINK;
4233 }
4234
bdcbd8e0
JB		 4235 sdata_info(sdata,
4236 "disassociating from %pM by local choice (reason=%d)\n",
4237 req->bss->bssid, req->reason_code);
0ff71613 4238
e69e95db 4239 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4240 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4241 req->reason_code, !req->local_state_change,
4242 frame_buf);
77fdaa12 4243 mutex_unlock(&ifmgd->mtx);
10f644a4 4244
6ae16775
AQ		 4245 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4246 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4247
10f644a4
JB		 4248 return 0;
4249}
026331c4 4250
afa762f6 4251void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4252{
4253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4254
49921859
BG		 4255 /*
4256 * Make sure some work items will not run after this,
4257 * they will not do anything but might not have been
4258 * cancelled when disconnecting.
4259 */
4260 cancel_work_sync(&ifmgd->monitor_work);
4261 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4262 cancel_work_sync(&ifmgd->request_smps_work);
4263 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4264 cancel_work_sync(&ifmgd->chswitch_work);
4265
54e4ffb2
JB		 4266 mutex_lock(&ifmgd->mtx);
4267 if (ifmgd->assoc_data)
4268 ieee80211_destroy_assoc_data(sdata, false);
4269 if (ifmgd->auth_data)
4270 ieee80211_destroy_auth_data(sdata, false);
4271 del_timer_sync(&ifmgd->timer);
4272 mutex_unlock(&ifmgd->mtx);
4273}
4274
a97c13c3
JO		 4275void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4276 enum nl80211_cqm_rssi_threshold_event rssi_event,
4277 gfp_t gfp)
4278{
4279 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4280
b5878a2d
JB		 4281 trace_api_cqm_rssi_notify(sdata, rssi_event);
4282
a97c13c3
JO		 4283 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4284}
4285EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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