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mac80211: support extended channel switch
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
59c1ec2b
BG		 59static int beacon_loss_count = 7;
60module_param(beacon_loss_count, int, 0644);
61MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 63
b291ba11
JB		 64/*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
d1c5091f 68#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 69/*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
180205bd
BG		 74static int probe_wait_ms = 500;
75module_param(probe_wait_ms, int, 0644);
76MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
f0706e82 79
17e4ec14
JM		 80/*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85#define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
391a200a
JM		 87/*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 120};
121
5484e237 122/* utils */
77fdaa12
JB		 123static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124{
46a5ebaf 125 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 126}
127
ca386f31
JB		 128/*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
66e67e41 138static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 139{
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145}
146
d3a910a8 147void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 148{
c1288b12 149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 150 return;
151
7eeff74c
JB		 152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
b291ba11 155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 157}
158
be099e82
LR		 159void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160{
0c699c3a
LR		 161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
8628172f
SG		 163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
be099e82
LR		 166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 171
172 ifmgd->probe_send_count = 0;
be099e82
LR		 173}
174
5484e237 175static int ecw2cw(int ecw)
60f8b39c 176{
5484e237 177 return (1 << ecw) - 1;
60f8b39c
JB		 178}
179
6565ec9b
JB		 180static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181{
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232}
233
234static u32
235ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 240 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 241{
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
30eb1dc2
JB		 268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
292 goto out;
293 }
294
295 if (!vht_oper || !sband->vht_cap.vht_supported) {
296 ret = IEEE80211_STA_DISABLE_VHT;
297 goto out;
298 }
299
300 vht_chandef.chan = channel;
301 vht_chandef.center_freq1 =
302 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
303 channel->band);
304 vht_chandef.center_freq2 = 0;
305
6565ec9b
JB		 306 switch (vht_oper->chan_width) {
307 case IEEE80211_VHT_CHANWIDTH_USE_HT:
308 vht_chandef.width = chandef->width;
309 break;
310 case IEEE80211_VHT_CHANWIDTH_80MHZ:
311 vht_chandef.width = NL80211_CHAN_WIDTH_80;
312 break;
313 case IEEE80211_VHT_CHANWIDTH_160MHZ:
314 vht_chandef.width = NL80211_CHAN_WIDTH_160;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 318 vht_chandef.center_freq2 =
319 ieee80211_channel_to_frequency(
320 vht_oper->center_freq_seg2_idx,
321 channel->band);
6565ec9b
JB		 322 break;
323 default:
30eb1dc2
JB		 324 if (verbose)
325 sdata_info(sdata,
326 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
327 vht_oper->chan_width);
6565ec9b
JB		 328 ret = IEEE80211_STA_DISABLE_VHT;
329 goto out;
330 }
331
332 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 333 if (verbose)
334 sdata_info(sdata,
335 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 336 ret = IEEE80211_STA_DISABLE_VHT;
337 goto out;
338 }
339
340 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
341 ret = 0;
342 goto out;
343 }
344
345 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 346 if (verbose)
347 sdata_info(sdata,
348 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 349 ret = IEEE80211_STA_DISABLE_VHT;
350 goto out;
351 }
352
353 *chandef = vht_chandef;
354
355 ret = 0;
356
357out:
586e01ed
JB		 358 /* don't print the message below for VHT mismatch if VHT is disabled */
359 if (ret & IEEE80211_STA_DISABLE_VHT)
360 vht_chandef = *chandef;
361
6565ec9b
JB		 362 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
363 IEEE80211_CHAN_DISABLED)) {
364 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
365 ret = IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT;
367 goto out;
368 }
369
370 ret |= chandef_downgrade(chandef);
371 }
372
30eb1dc2 373 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 374 sdata_info(sdata,
375 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
376
377 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
378 return ret;
379}
380
30eb1dc2
JB		 381static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
382 struct sta_info *sta,
383 const struct ieee80211_ht_operation *ht_oper,
384 const struct ieee80211_vht_operation *vht_oper,
385 const u8 *bssid, u32 *changed)
d5522e03
JB		 386{
387 struct ieee80211_local *local = sdata->local;
30eb1dc2 388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 389 struct ieee80211_supported_band *sband;
55de908a 390 struct ieee80211_channel *chan;
30eb1dc2 391 struct cfg80211_chan_def chandef;
9ed6bcce 392 u16 ht_opmode;
30eb1dc2
JB		 393 u32 flags;
394 enum ieee80211_sta_rx_bandwidth new_sta_bw;
395 int ret;
d5522e03 396
30eb1dc2
JB		 397 /* if HT was/is disabled, don't track any bandwidth changes */
398 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 399 return 0;
400
30eb1dc2
JB		 401 /* don't check VHT if we associated as non-VHT station */
402 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
403 vht_oper = NULL;
404
405 if (WARN_ON_ONCE(!sta))
406 return -EINVAL;
407
f2d9330e 408 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 409 sband = local->hw.wiphy->bands[chan->band];
d5522e03 410
30eb1dc2
JB		 411 /* calculate new channel (type) based on HT/VHT operation IEs */
412 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
413 vht_oper, &chandef, false);
414
415 /*
416 * Downgrade the new channel if we associated with restricted
417 * capabilities. For example, if we associated as a 20 MHz STA
418 * to a 40 MHz AP (due to regulatory, capabilities or config
419 * reasons) then switching to a 40 MHz channel now won't do us
420 * any good -- we couldn't use it with the AP.
421 */
422 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
423 chandef.width == NL80211_CHAN_WIDTH_80P80)
424 flags |= chandef_downgrade(&chandef);
425 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
426 chandef.width == NL80211_CHAN_WIDTH_160)
427 flags |= chandef_downgrade(&chandef);
428 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
429 chandef.width > NL80211_CHAN_WIDTH_20)
430 flags |= chandef_downgrade(&chandef);
431
432 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
433 return 0;
434
435 sdata_info(sdata,
436 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
437 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
438 chandef.center_freq1, chandef.center_freq2);
439
440 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
441 IEEE80211_STA_DISABLE_VHT |
442 IEEE80211_STA_DISABLE_40MHZ |
443 IEEE80211_STA_DISABLE_80P80MHZ |
444 IEEE80211_STA_DISABLE_160MHZ)) ||
445 !cfg80211_chandef_valid(&chandef)) {
446 sdata_info(sdata,
447 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
448 ifmgd->bssid);
449 return -EINVAL;
450 }
451
452 switch (chandef.width) {
453 case NL80211_CHAN_WIDTH_20_NOHT:
454 case NL80211_CHAN_WIDTH_20:
455 new_sta_bw = IEEE80211_STA_RX_BW_20;
456 break;
4bf88530 457 case NL80211_CHAN_WIDTH_40:
30eb1dc2 458 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 459 break;
30eb1dc2
JB		 460 case NL80211_CHAN_WIDTH_80:
461 new_sta_bw = IEEE80211_STA_RX_BW_80;
462 break;
463 case NL80211_CHAN_WIDTH_80P80:
464 case NL80211_CHAN_WIDTH_160:
465 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 466 break;
30eb1dc2
JB		 467 default:
468 return -EINVAL;
64f68e5d 469 }
d5522e03 470
30eb1dc2
JB		 471 if (new_sta_bw > sta->cur_max_bandwidth)
472 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 473
30eb1dc2
JB		 474 if (new_sta_bw < sta->sta.bandwidth) {
475 sta->sta.bandwidth = new_sta_bw;
476 rate_control_rate_update(local, sband, sta,
477 IEEE80211_RC_BW_CHANGED);
478 }
64f68e5d 479
30eb1dc2
JB		 480 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
481 if (ret) {
482 sdata_info(sdata,
483 "AP %pM changed bandwidth to incompatible one - disconnect\n",
484 ifmgd->bssid);
485 return ret;
486 }
7cc44ed4 487
30eb1dc2
JB		 488 if (new_sta_bw > sta->sta.bandwidth) {
489 sta->sta.bandwidth = new_sta_bw;
490 rate_control_rate_update(local, sband, sta,
491 IEEE80211_RC_BW_CHANGED);
0aaffa9b 492 }
d5522e03 493
074d46d1 494 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 495
496 /* if bss configuration changed store the new one */
30eb1dc2
JB		 497 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
498 *changed |= BSS_CHANGED_HT;
9ed6bcce 499 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 500 }
501
30eb1dc2 502 return 0;
d5522e03
JB		 503}
504
9c6bd790
JB		 505/* frame sending functions */
506
66e67e41
JB		 507static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
508 struct ieee80211_supported_band *sband,
509 u32 *rates)
510{
511 int i, j, count;
512 *rates = 0;
513 count = 0;
514 for (i = 0; i < supp_rates_len; i++) {
515 int rate = (supp_rates[i] & 0x7F) * 5;
516
517 for (j = 0; j < sband->n_bitrates; j++)
518 if (sband->bitrates[j].bitrate == rate) {
519 *rates |= BIT(j);
520 count++;
521 break;
522 }
523 }
524
525 return count;
526}
527
528static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 529 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 530 struct ieee80211_supported_band *sband,
531 struct ieee80211_channel *channel,
532 enum ieee80211_smps_mode smps)
533{
66e67e41
JB		 534 u8 *pos;
535 u32 flags = channel->flags;
536 u16 cap;
537 struct ieee80211_sta_ht_cap ht_cap;
538
539 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
540
66e67e41
JB		 541 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
542 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
543
66e67e41
JB		 544 /* determine capability flags */
545 cap = ht_cap.cap;
546
9dde6423 547 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 548 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
549 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
550 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
551 cap &= ~IEEE80211_HT_CAP_SGI_40;
552 }
553 break;
554 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
555 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
556 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
557 cap &= ~IEEE80211_HT_CAP_SGI_40;
558 }
559 break;
560 }
561
24398e39
JB		 562 /*
563 * If 40 MHz was disabled associate as though we weren't
564 * capable of 40 MHz -- some broken APs will never fall
565 * back to trying to transmit in 20 MHz.
566 */
567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
568 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
569 cap &= ~IEEE80211_HT_CAP_SGI_40;
570 }
571
66e67e41
JB		 572 /* set SM PS mode properly */
573 cap &= ~IEEE80211_HT_CAP_SM_PS;
574 switch (smps) {
575 case IEEE80211_SMPS_AUTOMATIC:
576 case IEEE80211_SMPS_NUM_MODES:
577 WARN_ON(1);
578 case IEEE80211_SMPS_OFF:
579 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
580 IEEE80211_HT_CAP_SM_PS_SHIFT;
581 break;
582 case IEEE80211_SMPS_STATIC:
583 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
584 IEEE80211_HT_CAP_SM_PS_SHIFT;
585 break;
586 case IEEE80211_SMPS_DYNAMIC:
587 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
588 IEEE80211_HT_CAP_SM_PS_SHIFT;
589 break;
590 }
591
592 /* reserve and fill IE */
593 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
594 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
595}
596
d545daba
MP		 597static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
598 struct sk_buff *skb,
b08fbbd8
JB		 599 struct ieee80211_supported_band *sband,
600 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 601{
602 u8 *pos;
603 u32 cap;
604 struct ieee80211_sta_vht_cap vht_cap;
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
d545daba 632 /* reserve and fill IE */
d4950281 633 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 634 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
635}
636
66e67e41
JB		 637static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
638{
639 struct ieee80211_local *local = sdata->local;
640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
641 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
642 struct sk_buff *skb;
643 struct ieee80211_mgmt *mgmt;
644 u8 *pos, qos_info;
645 size_t offset = 0, noffset;
646 int i, count, rates_len, supp_rates_len;
647 u16 capab;
648 struct ieee80211_supported_band *sband;
55de908a
JB		 649 struct ieee80211_chanctx_conf *chanctx_conf;
650 struct ieee80211_channel *chan;
66e67e41 651 u32 rates = 0;
66e67e41
JB		 652
653 lockdep_assert_held(&ifmgd->mtx);
654
55de908a
JB		 655 rcu_read_lock();
656 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
657 if (WARN_ON(!chanctx_conf)) {
658 rcu_read_unlock();
659 return;
660 }
4bf88530 661 chan = chanctx_conf->def.chan;
55de908a
JB		 662 rcu_read_unlock();
663 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 664
665 if (assoc_data->supp_rates_len) {
666 /*
667 * Get all rates supported by the device and the AP as
668 * some APs don't like getting a superset of their rates
669 * in the association request (e.g. D-Link DAP 1353 in
670 * b-only mode)...
671 */
672 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
673 assoc_data->supp_rates_len,
674 sband, &rates);
675 } else {
676 /*
677 * In case AP not provide any supported rates information
678 * before association, we send information element(s) with
679 * all rates that we support.
680 */
681 rates = ~0;
682 rates_len = sband->n_bitrates;
683 }
684
685 skb = alloc_skb(local->hw.extra_tx_headroom +
686 sizeof(*mgmt) + /* bit too much but doesn't matter */
687 2 + assoc_data->ssid_len + /* SSID */
688 4 + rates_len + /* (extended) rates */
689 4 + /* power capability */
690 2 + 2 * sband->n_channels + /* supported channels */
691 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 692 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 693 assoc_data->ie_len + /* extra IEs */
694 9, /* WMM */
695 GFP_KERNEL);
696 if (!skb)
697 return;
698
699 skb_reserve(skb, local->hw.extra_tx_headroom);
700
701 capab = WLAN_CAPABILITY_ESS;
702
703 if (sband->band == IEEE80211_BAND_2GHZ) {
704 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
705 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
706 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
707 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
708 }
709
710 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
711 capab |= WLAN_CAPABILITY_PRIVACY;
712
713 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
714 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
715 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
716
717 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
718 memset(mgmt, 0, 24);
719 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
720 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
721 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
722
723 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
724 skb_put(skb, 10);
725 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
726 IEEE80211_STYPE_REASSOC_REQ);
727 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
728 mgmt->u.reassoc_req.listen_interval =
729 cpu_to_le16(local->hw.conf.listen_interval);
730 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
731 ETH_ALEN);
732 } else {
733 skb_put(skb, 4);
734 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
735 IEEE80211_STYPE_ASSOC_REQ);
736 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
737 mgmt->u.assoc_req.listen_interval =
738 cpu_to_le16(local->hw.conf.listen_interval);
739 }
740
741 /* SSID */
742 pos = skb_put(skb, 2 + assoc_data->ssid_len);
743 *pos++ = WLAN_EID_SSID;
744 *pos++ = assoc_data->ssid_len;
745 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
746
747 /* add all rates which were marked to be used above */
748 supp_rates_len = rates_len;
749 if (supp_rates_len > 8)
750 supp_rates_len = 8;
751
752 pos = skb_put(skb, supp_rates_len + 2);
753 *pos++ = WLAN_EID_SUPP_RATES;
754 *pos++ = supp_rates_len;
755
756 count = 0;
757 for (i = 0; i < sband->n_bitrates; i++) {
758 if (BIT(i) & rates) {
759 int rate = sband->bitrates[i].bitrate;
760 *pos++ = (u8) (rate / 5);
761 if (++count == 8)
762 break;
763 }
764 }
765
766 if (rates_len > count) {
767 pos = skb_put(skb, rates_len - count + 2);
768 *pos++ = WLAN_EID_EXT_SUPP_RATES;
769 *pos++ = rates_len - count;
770
771 for (i++; i < sband->n_bitrates; i++) {
772 if (BIT(i) & rates) {
773 int rate = sband->bitrates[i].bitrate;
774 *pos++ = (u8) (rate / 5);
775 }
776 }
777 }
778
779 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
780 /* 1. power capabilities */
781 pos = skb_put(skb, 4);
782 *pos++ = WLAN_EID_PWR_CAPABILITY;
783 *pos++ = 2;
784 *pos++ = 0; /* min tx power */
55de908a 785 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 786
787 /* 2. supported channels */
788 /* TODO: get this in reg domain format */
789 pos = skb_put(skb, 2 * sband->n_channels + 2);
790 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
791 *pos++ = 2 * sband->n_channels;
792 for (i = 0; i < sband->n_channels; i++) {
793 *pos++ = ieee80211_frequency_to_channel(
794 sband->channels[i].center_freq);
795 *pos++ = 1; /* one channel in the subband*/
796 }
797 }
798
799 /* if present, add any custom IEs that go before HT */
800 if (assoc_data->ie_len && assoc_data->ie) {
801 static const u8 before_ht[] = {
802 WLAN_EID_SSID,
803 WLAN_EID_SUPP_RATES,
804 WLAN_EID_EXT_SUPP_RATES,
805 WLAN_EID_PWR_CAPABILITY,
806 WLAN_EID_SUPPORTED_CHANNELS,
807 WLAN_EID_RSN,
808 WLAN_EID_QOS_CAPA,
809 WLAN_EID_RRM_ENABLED_CAPABILITIES,
810 WLAN_EID_MOBILITY_DOMAIN,
811 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
812 };
813 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
814 before_ht, ARRAY_SIZE(before_ht),
815 offset);
816 pos = skb_put(skb, noffset - offset);
817 memcpy(pos, assoc_data->ie + offset, noffset - offset);
818 offset = noffset;
819 }
820
f2d9d270
JB		 821 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
822 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
823 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
824
a8243b72 825 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 826 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 827 sband, chan, sdata->smps_mode);
66e67e41 828
d545daba 829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 830 ieee80211_add_vht_ie(sdata, skb, sband,
831 &assoc_data->ap_vht_cap);
d545daba 832
66e67e41
JB		 833 /* if present, add any custom non-vendor IEs that go after HT */
834 if (assoc_data->ie_len && assoc_data->ie) {
835 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
836 assoc_data->ie_len,
837 offset);
838 pos = skb_put(skb, noffset - offset);
839 memcpy(pos, assoc_data->ie + offset, noffset - offset);
840 offset = noffset;
841 }
842
76f0303d
JB		 843 if (assoc_data->wmm) {
844 if (assoc_data->uapsd) {
dc41e4d4
EP		 845 qos_info = ifmgd->uapsd_queues;
846 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 847 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
848 } else {
849 qos_info = 0;
850 }
851
852 pos = skb_put(skb, 9);
853 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
854 *pos++ = 7; /* len */
855 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
856 *pos++ = 0x50;
857 *pos++ = 0xf2;
858 *pos++ = 2; /* WME */
859 *pos++ = 0; /* WME info */
860 *pos++ = 1; /* WME ver */
861 *pos++ = qos_info;
862 }
863
864 /* add any remaining custom (i.e. vendor specific here) IEs */
865 if (assoc_data->ie_len && assoc_data->ie) {
866 noffset = assoc_data->ie_len;
867 pos = skb_put(skb, noffset - offset);
868 memcpy(pos, assoc_data->ie + offset, noffset - offset);
869 }
870
a1845fc7
JB		 871 drv_mgd_prepare_tx(local, sdata);
872
66e67e41 873 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 874 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
875 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
876 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 877 ieee80211_tx_skb(sdata, skb);
878}
879
572e0012
KV		 880void ieee80211_send_pspoll(struct ieee80211_local *local,
881 struct ieee80211_sub_if_data *sdata)
882{
572e0012
KV		 883 struct ieee80211_pspoll *pspoll;
884 struct sk_buff *skb;
572e0012 885
d8cd189e
KV		 886 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
887 if (!skb)
572e0012 888 return;
572e0012 889
d8cd189e
KV		 890 pspoll = (struct ieee80211_pspoll *) skb->data;
891 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 892
62ae67be
JB		 893 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
894 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 895}
896
965bedad
JB		 897void ieee80211_send_nullfunc(struct ieee80211_local *local,
898 struct ieee80211_sub_if_data *sdata,
899 int powersave)
900{
901 struct sk_buff *skb;
d8cd189e 902 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 904
d8cd189e
KV		 905 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
906 if (!skb)
965bedad 907 return;
965bedad 908
d8cd189e 909 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 910 if (powersave)
d8cd189e 911 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 912
6c17b77b
SF		 913 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
914 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 915 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
916 IEEE80211_STA_CONNECTION_POLL))
917 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
918
62ae67be 919 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 920}
921
d524215f
FF		 922static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
923 struct ieee80211_sub_if_data *sdata)
924{
925 struct sk_buff *skb;
926 struct ieee80211_hdr *nullfunc;
927 __le16 fc;
928
929 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
930 return;
931
932 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 933 if (!skb)
d524215f 934 return;
d15b8459 935
d524215f
FF		 936 skb_reserve(skb, local->hw.extra_tx_headroom);
937
938 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
939 memset(nullfunc, 0, 30);
940 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
941 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
942 nullfunc->frame_control = fc;
943 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
944 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
945 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
946 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
947
948 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
949 ieee80211_tx_skb(sdata, skb);
950}
951
cc32abd4
JB		 952/* spectrum management related things */
953static void ieee80211_chswitch_work(struct work_struct *work)
954{
955 struct ieee80211_sub_if_data *sdata =
956 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 957 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
959
9607e6b6 960 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 961 return;
962
77fdaa12
JB		 963 mutex_lock(&ifmgd->mtx);
964 if (!ifmgd->associated)
965 goto out;
cc32abd4 966
675a0b04
KB		 967 /*
968 * FIXME: Here we are downgrading to NL80211_CHAN_WIDTH_20_NOHT
969 * and don't adjust our ht/vht settings
970 * This is wrong - we should behave according to the CSA params
971 */
972 local->_oper_chandef.chan = local->csa_channel;
973 local->_oper_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
974 local->_oper_chandef.center_freq1 =
975 local->_oper_chandef.chan->center_freq;
976 local->_oper_chandef.center_freq2 = 0;
977
978 if (!local->ops->channel_switch) {
5ce6e438 979 /* call "hw_config" only if doing sw channel switch */
675a0b04 980 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 981 } else {
982 /* update the device channel directly */
675a0b04 983 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 984 }
77fdaa12 985
cc32abd4 986 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 987 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 988
57eebdf3 989 /* XXX: wait for a beacon first? */
675a0b04 990 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 991 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 992 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 993 out:
994 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
995 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 996}
997
5ce6e438
JB		 998void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
999{
55de908a
JB		 1000 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1002
1003 trace_api_chswitch_done(sdata, success);
1004 if (!success) {
882a7c69
JB		 1005 sdata_info(sdata,
1006 "driver channel switch failed, disconnecting\n");
1007 ieee80211_queue_work(&sdata->local->hw,
1008 &ifmgd->csa_connection_drop_work);
1009 } else {
1010 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1011 }
5ce6e438
JB		 1012}
1013EXPORT_SYMBOL(ieee80211_chswitch_done);
1014
cc32abd4
JB		 1015static void ieee80211_chswitch_timer(unsigned long data)
1016{
1017 struct ieee80211_sub_if_data *sdata =
1018 (struct ieee80211_sub_if_data *) data;
5bb644a0 1019
9b7d72c1 1020 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1021}
1022
37799e52 1023static void
4a3cb702 1024ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
37799e52 1025 u64 timestamp, struct ieee802_11_elems *elems)
cc32abd4 1026{
b4f286a1 1027 struct ieee80211_local *local = sdata->local;
cc32abd4 1028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52
JB		 1029 struct cfg80211_bss *cbss = ifmgd->associated;
1030 struct ieee80211_bss *bss;
1031 struct ieee80211_channel *new_ch;
55de908a 1032 struct ieee80211_chanctx *chanctx;
b4f286a1
JB		 1033 enum ieee80211_band new_band;
1034 int new_freq;
1035 u8 new_chan_no;
1036 u8 count;
1037 u8 mode;
cc32abd4 1038
77fdaa12
JB		 1039 ASSERT_MGD_MTX(ifmgd);
1040
37799e52 1041 if (!cbss)
cc32abd4
JB		 1042 return;
1043
b4f286a1 1044 if (local->scanning)
cc32abd4
JB		 1045 return;
1046
37799e52 1047 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1048 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1049 return;
1050
b4f286a1
JB		 1051 if (elems->ext_chansw_ie) {
1052 if (!ieee80211_operating_class_to_band(
1053 elems->ext_chansw_ie->new_operating_class,
1054 &new_band)) {
1055 sdata_info(sdata,
1056 "cannot understand ECSA IE operating class %d, disconnecting\n",
1057 elems->ext_chansw_ie->new_operating_class);
1058 ieee80211_queue_work(&local->hw,
1059 &ifmgd->csa_connection_drop_work);
1060 }
1061 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1062 count = elems->ext_chansw_ie->count;
1063 mode = elems->ext_chansw_ie->mode;
1064 } else if (elems->ch_switch_ie) {
1065 new_band = cbss->channel->band;
1066 new_chan_no = elems->ch_switch_ie->new_ch_num;
1067 count = elems->ch_switch_ie->count;
1068 mode = elems->ch_switch_ie->mode;
1069 } else {
1070 /* nothing here we understand */
37799e52 1071 return;
b4f286a1 1072 }
37799e52
JB		 1073
1074 bss = (void *)cbss->priv;
1075
b4f286a1
JB		 1076 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1077 new_ch = ieee80211_get_channel(local->hw.wiphy, new_freq);
882a7c69
JB		 1078 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1079 sdata_info(sdata,
1080 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1081 ifmgd->associated->bssid, new_freq);
b4f286a1 1082 ieee80211_queue_work(&local->hw,
882a7c69 1083 &ifmgd->csa_connection_drop_work);
cc32abd4 1084 return;
882a7c69 1085 }
cc32abd4 1086
57eebdf3
JB		 1087 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1088
b4f286a1 1089 if (local->use_chanctx) {
55de908a
JB		 1090 sdata_info(sdata,
1091 "not handling channel switch with channel contexts\n");
b4f286a1 1092 ieee80211_queue_work(&local->hw,
55de908a 1093 &ifmgd->csa_connection_drop_work);
246dc3fd 1094 return;
55de908a
JB		 1095 }
1096
b4f286a1 1097 mutex_lock(&local->chanctx_mtx);
55de908a 1098 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
b4f286a1 1099 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1100 return;
1101 }
1102 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1103 struct ieee80211_chanctx, conf);
1104 if (chanctx->refcount > 1) {
1105 sdata_info(sdata,
1106 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1107 ieee80211_queue_work(&local->hw,
55de908a 1108 &ifmgd->csa_connection_drop_work);
b4f286a1 1109 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1110 return;
1111 }
b4f286a1 1112 mutex_unlock(&local->chanctx_mtx);
55de908a 1113
b4f286a1 1114 local->csa_channel = new_ch;
55de908a 1115
b4f286a1
JB		 1116 if (mode)
1117 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1118 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1119 IEEE80211_QUEUE_STOP_REASON_CSA);
1120
b4f286a1 1121 if (local->ops->channel_switch) {
5ce6e438 1122 /* use driver's channel switch callback */
57eebdf3
JB		 1123 struct ieee80211_channel_switch ch_switch = {
1124 .timestamp = timestamp,
b4f286a1 1125 .block_tx = mode,
57eebdf3 1126 .channel = new_ch,
b4f286a1 1127 .count = count,
57eebdf3
JB		 1128 };
1129
b4f286a1 1130 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1131 return;
1132 }
1133
1134 /* channel switch handled in software */
b4f286a1
JB		 1135 if (count <= 1)
1136 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1137 else
cc32abd4 1138 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1139 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1140}
1141
1ea6f9c0
JB		 1142static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1143 struct ieee80211_channel *channel,
1144 const u8 *country_ie, u8 country_ie_len,
1145 const u8 *pwr_constr_elem)
cc32abd4 1146{
04b7b2ff
JB		 1147 struct ieee80211_country_ie_triplet *triplet;
1148 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1149 int i, chan_pwr, chan_increment, new_ap_level;
1150 bool have_chan_pwr = false;
cc32abd4 1151
04b7b2ff
JB		 1152 /* Invalid IE */
1153 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1154 return 0;
cc32abd4 1155
04b7b2ff
JB		 1156 triplet = (void *)(country_ie + 3);
1157 country_ie_len -= 3;
1158
1159 switch (channel->band) {
1160 default:
1161 WARN_ON_ONCE(1);
1162 /* fall through */
1163 case IEEE80211_BAND_2GHZ:
1164 case IEEE80211_BAND_60GHZ:
1165 chan_increment = 1;
1166 break;
1167 case IEEE80211_BAND_5GHZ:
1168 chan_increment = 4;
1169 break;
cc32abd4 1170 }
04b7b2ff
JB		 1171
1172 /* find channel */
1173 while (country_ie_len >= 3) {
1174 u8 first_channel = triplet->chans.first_channel;
1175
1176 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1177 goto next;
1178
1179 for (i = 0; i < triplet->chans.num_channels; i++) {
1180 if (first_channel + i * chan_increment == chan) {
1181 have_chan_pwr = true;
1182 chan_pwr = triplet->chans.max_power;
1183 break;
1184 }
1185 }
1186 if (have_chan_pwr)
1187 break;
1188
1189 next:
1190 triplet++;
1191 country_ie_len -= 3;
1192 }
1193
1194 if (!have_chan_pwr)
1ea6f9c0 1195 return 0;
04b7b2ff
JB		 1196
1197 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1198
1ea6f9c0
JB		 1199 if (sdata->ap_power_level == new_ap_level)
1200 return 0;
04b7b2ff
JB		 1201
1202 sdata_info(sdata,
1203 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1204 new_ap_level, chan_pwr, *pwr_constr_elem,
1205 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1206 sdata->ap_power_level = new_ap_level;
1207 if (__ieee80211_recalc_txpower(sdata))
1208 return BSS_CHANGED_TXPOWER;
1209 return 0;
cc32abd4
JB		 1210}
1211
965bedad
JB		 1212/* powersave */
1213static void ieee80211_enable_ps(struct ieee80211_local *local,
1214 struct ieee80211_sub_if_data *sdata)
1215{
1216 struct ieee80211_conf *conf = &local->hw.conf;
1217
d5edaedc
JB		 1218 /*
1219 * If we are scanning right now then the parameters will
1220 * take effect when scan finishes.
1221 */
fbe9c429 1222 if (local->scanning)
d5edaedc
JB		 1223 return;
1224
965bedad
JB		 1225 if (conf->dynamic_ps_timeout > 0 &&
1226 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1227 mod_timer(&local->dynamic_ps_timer, jiffies +
1228 msecs_to_jiffies(conf->dynamic_ps_timeout));
1229 } else {
1230 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1231 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1232
2a13052f
JO		 1233 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1234 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1235 return;
1236
1237 conf->flags |= IEEE80211_CONF_PS;
1238 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1239 }
1240}
1241
1242static void ieee80211_change_ps(struct ieee80211_local *local)
1243{
1244 struct ieee80211_conf *conf = &local->hw.conf;
1245
1246 if (local->ps_sdata) {
965bedad
JB		 1247 ieee80211_enable_ps(local, local->ps_sdata);
1248 } else if (conf->flags & IEEE80211_CONF_PS) {
1249 conf->flags &= ~IEEE80211_CONF_PS;
1250 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1251 del_timer_sync(&local->dynamic_ps_timer);
1252 cancel_work_sync(&local->dynamic_ps_enable_work);
1253 }
1254}
1255
808118cb
JY		 1256static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1257{
1258 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1259 struct sta_info *sta = NULL;
c2c98fde 1260 bool authorized = false;
808118cb
JY		 1261
1262 if (!mgd->powersave)
1263 return false;
1264
05cb9108
JB		 1265 if (mgd->broken_ap)
1266 return false;
1267
808118cb
JY		 1268 if (!mgd->associated)
1269 return false;
1270
808118cb
JY		 1271 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1272 IEEE80211_STA_CONNECTION_POLL))
1273 return false;
1274
1275 rcu_read_lock();
1276 sta = sta_info_get(sdata, mgd->bssid);
1277 if (sta)
c2c98fde 1278 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1279 rcu_read_unlock();
1280
c2c98fde 1281 return authorized;
808118cb
JY		 1282}
1283
965bedad 1284/* need to hold RTNL or interface lock */
10f644a4 1285void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1286{
1287 struct ieee80211_sub_if_data *sdata, *found = NULL;
1288 int count = 0;
195e294d 1289 int timeout;
965bedad
JB		 1290
1291 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1292 local->ps_sdata = NULL;
1293 return;
1294 }
1295
1296 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1297 if (!ieee80211_sdata_running(sdata))
965bedad 1298 continue;
8c7914de
RM		 1299 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1300 /* If an AP vif is found, then disable PS
1301 * by setting the count to zero thereby setting
1302 * ps_sdata to NULL.
1303 */
1304 count = 0;
1305 break;
1306 }
965bedad
JB		 1307 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1308 continue;
1309 found = sdata;
1310 count++;
1311 }
1312
808118cb 1313 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1314 s32 beaconint_us;
1315
1316 if (latency < 0)
ed77134b 1317 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1318
1319 beaconint_us = ieee80211_tu_to_usec(
1320 found->vif.bss_conf.beacon_int);
1321
ff616381 1322 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1323 if (timeout < 0) {
1324 /*
ff616381
JO		 1325 * Go to full PSM if the user configures a very low
1326 * latency requirement.
0ab82b04
EP		 1327 * The 2000 second value is there for compatibility
1328 * until the PM_QOS_NETWORK_LATENCY is configured
1329 * with real values.
195e294d 1330 */
0ab82b04
EP		 1331 if (latency > (1900 * USEC_PER_MSEC) &&
1332 latency != (2000 * USEC_PER_SEC))
195e294d 1333 timeout = 0;
ff616381
JO		 1334 else
1335 timeout = 100;
195e294d 1336 }
09b85568 1337 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1338
04fe2037 1339 if (beaconint_us > latency) {
10f644a4 1340 local->ps_sdata = NULL;
04fe2037 1341 } else {
04fe2037 1342 int maxslp = 1;
826262c3 1343 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1344
1345 /* If the TIM IE is invalid, pretend the value is 1 */
1346 if (!dtimper)
1347 dtimper = 1;
1348 else if (dtimper > 1)
04fe2037
JB		 1349 maxslp = min_t(int, dtimper,
1350 latency / beaconint_us);
1351
9ccebe61 1352 local->hw.conf.max_sleep_period = maxslp;
56007a02 1353 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1354 local->ps_sdata = found;
04fe2037 1355 }
10f644a4 1356 } else {
965bedad 1357 local->ps_sdata = NULL;
10f644a4 1358 }
965bedad
JB		 1359
1360 ieee80211_change_ps(local);
1361}
1362
ab095877
EP		 1363void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1364{
1365 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1366
1367 if (sdata->vif.bss_conf.ps != ps_allowed) {
1368 sdata->vif.bss_conf.ps = ps_allowed;
1369 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1370 }
1371}
1372
965bedad
JB		 1373void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1374{
1375 struct ieee80211_local *local =
1376 container_of(work, struct ieee80211_local,
1377 dynamic_ps_disable_work);
1378
1379 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1380 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1381 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1382 }
1383
1384 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1385 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1386 IEEE80211_QUEUE_STOP_REASON_PS);
1387}
1388
1389void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1390{
1391 struct ieee80211_local *local =
1392 container_of(work, struct ieee80211_local,
1393 dynamic_ps_enable_work);
1394 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1395 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1396 unsigned long flags;
1397 int q;
965bedad
JB		 1398
1399 /* can only happen when PS was just disabled anyway */
1400 if (!sdata)
1401 return;
1402
5e34069c
CL		 1403 ifmgd = &sdata->u.mgd;
1404
965bedad
JB		 1405 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1406 return;
1407
09b85568 1408 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1409 /* don't enter PS if TX frames are pending */
1410 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1411 mod_timer(&local->dynamic_ps_timer, jiffies +
1412 msecs_to_jiffies(
1413 local->hw.conf.dynamic_ps_timeout));
1414 return;
1415 }
77b7023a
AN		 1416
1417 /*
1418 * transmission can be stopped by others which leads to
1419 * dynamic_ps_timer expiry. Postpone the ps timer if it
1420 * is not the actual idle state.
1421 */
1422 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1423 for (q = 0; q < local->hw.queues; q++) {
1424 if (local->queue_stop_reasons[q]) {
1425 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1426 flags);
1427 mod_timer(&local->dynamic_ps_timer, jiffies +
1428 msecs_to_jiffies(
1429 local->hw.conf.dynamic_ps_timeout));
1430 return;
1431 }
1432 }
1433 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1434 }
1ddc2867 1435
375177bf 1436 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1437 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1438 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1439 mod_timer(&local->dynamic_ps_timer, jiffies +
1440 msecs_to_jiffies(
1441 local->hw.conf.dynamic_ps_timeout));
a1598383 1442 } else {
e8306f98
VN		 1443 ieee80211_send_nullfunc(local, sdata, 1);
1444 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1445 ieee80211_flush_queues(local, sdata);
e8306f98 1446 }
f3e85b9e
VN		 1447 }
1448
2a13052f
JO		 1449 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1450 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1451 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1452 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1453 local->hw.conf.flags |= IEEE80211_CONF_PS;
1454 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1455 }
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 1647 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1648 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 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) {
9caf0364
JB		 1661 int ret;
1662
1663 ret = cfg80211_get_p2p_attr(
1664 ies->data, ies->len,
1665 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1666 (u8 *) &bss_conf->p2p_noa_attr,
1667 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1668 if (ret >= 2) {
67baf663
JD		 1669 sdata->u.mgd.p2p_noa_index =
1670 bss_conf->p2p_noa_attr.index;
9caf0364 1671 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1672 }
488dd7b5 1673 }
9caf0364 1674 rcu_read_unlock();
488dd7b5
JB		 1675 }
1676
b291ba11 1677 /* just to be sure */
925e64c3 1678 ieee80211_stop_poll(sdata);
b291ba11 1679
9ac19a90 1680 ieee80211_led_assoc(local, 1);
9306102e 1681
c65dd147 1682 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1683 /*
1684 * If the AP is buggy we may get here with no DTIM period
1685 * known, so assume it's 1 which is the only safe assumption
1686 * in that case, although if the TIM IE is broken powersave
1687 * probably just won't work at all.
1688 */
1689 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1690 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1691 } else {
e5b900d2 1692 bss_conf->dtim_period = 0;
826262c3 1693 }
e5b900d2 1694
68542962 1695 bss_conf->assoc = 1;
9cef8737 1696
a97c13c3 1697 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1698 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1699 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1700 bss_info_changed |= BSS_CHANGED_CQM;
1701
68542962 1702 /* Enable ARP filtering */
0f19b41e 1703 if (bss_conf->arp_addr_cnt)
68542962 1704 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1705
ae5eb026 1706 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1707
056508dc
JB		 1708 mutex_lock(&local->iflist_mtx);
1709 ieee80211_recalc_ps(local, -1);
1710 mutex_unlock(&local->iflist_mtx);
e0cb686f 1711
04ecd257 1712 ieee80211_recalc_smps(sdata);
ab095877
EP		 1713 ieee80211_recalc_ps_vif(sdata);
1714
9ac19a90 1715 netif_carrier_on(sdata->dev);
f0706e82
JB		 1716}
1717
e69e95db 1718static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1719 u16 stype, u16 reason, bool tx,
1720 u8 *frame_buf)
aa458d17 1721{
46900298 1722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1723 struct ieee80211_local *local = sdata->local;
3cc5240b 1724 u32 changed = 0;
aa458d17 1725
77fdaa12
JB		 1726 ASSERT_MGD_MTX(ifmgd);
1727
37ad3888
JB		 1728 if (WARN_ON_ONCE(tx && !frame_buf))
1729 return;
1730
b291ba11
JB		 1731 if (WARN_ON(!ifmgd->associated))
1732 return;
1733
79543d8e
DS		 1734 ieee80211_stop_poll(sdata);
1735
77fdaa12 1736 ifmgd->associated = NULL;
aa458d17
TW		 1737 netif_carrier_off(sdata->dev);
1738
88bc40e8
EP		 1739 /*
1740 * if we want to get out of ps before disassoc (why?) we have
1741 * to do it before sending disassoc, as otherwise the null-packet
1742 * won't be valid.
1743 */
1744 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1745 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1746 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1747 }
1748 local->ps_sdata = NULL;
1749
ab095877
EP		 1750 /* disable per-vif ps */
1751 ieee80211_recalc_ps_vif(sdata);
1752
f823981e
EP		 1753 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1754 if (tx)
39ecc01d 1755 ieee80211_flush_queues(local, sdata);
f823981e 1756
37ad3888
JB		 1757 /* deauthenticate/disassociate now */
1758 if (tx || frame_buf)
88a9e31c
EP		 1759 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1760 reason, tx, frame_buf);
37ad3888
JB		 1761
1762 /* flush out frame */
1763 if (tx)
39ecc01d 1764 ieee80211_flush_queues(local, sdata);
37ad3888 1765
88a9e31c
EP		 1766 /* clear bssid only after building the needed mgmt frames */
1767 memset(ifmgd->bssid, 0, ETH_ALEN);
1768
37ad3888 1769 /* remove AP and TDLS peers */
051007d9 1770 sta_info_flush_defer(sdata);
37ad3888
JB		 1771
1772 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1773 changed |= ieee80211_reset_erp_info(sdata);
1774
f5e5bf25 1775 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1776 changed |= BSS_CHANGED_ASSOC;
1777 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1778
67baf663
JD		 1779 ifmgd->p2p_noa_index = -1;
1780 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1781 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1782
dd5ecfea 1783 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1784 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1785 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1786 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1787 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1788
1ea6f9c0 1789 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1790
520eb820
KV		 1791 del_timer_sync(&local->dynamic_ps_timer);
1792 cancel_work_sync(&local->dynamic_ps_enable_work);
1793
68542962 1794 /* Disable ARP filtering */
0f19b41e 1795 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1796 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1797
3abead59
JB		 1798 sdata->vif.bss_conf.qos = false;
1799 changed |= BSS_CHANGED_QOS;
1800
0aaffa9b
JB		 1801 /* The BSSID (not really interesting) and HT changed */
1802 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1803 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1804
3abead59
JB		 1805 /* disassociated - set to defaults now */
1806 ieee80211_set_wmm_default(sdata, false);
1807
b9dcf712
JB		 1808 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1809 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1810 del_timer_sync(&sdata->u.mgd.timer);
1811 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1812
826262c3
JB		 1813 sdata->vif.bss_conf.dtim_period = 0;
1814
028e8da0
JB		 1815 ifmgd->flags = 0;
1816 ieee80211_vif_release_channel(sdata);
aa458d17 1817}
f0706e82 1818
3cf335d5
KV		 1819void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1820 struct ieee80211_hdr *hdr)
1821{
1822 /*
1823 * We can postpone the mgd.timer whenever receiving unicast frames
1824 * from AP because we know that the connection is working both ways
1825 * at that time. But multicast frames (and hence also beacons) must
1826 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1827 * data idle periods for sending the periodic probe request to the
1828 * AP we're connected to.
3cf335d5 1829 */
b291ba11
JB		 1830 if (is_multicast_ether_addr(hdr->addr1))
1831 return;
1832
be099e82 1833 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1834}
f0706e82 1835
4e5ff376
FF		 1836static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1837{
1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1839 struct ieee80211_local *local = sdata->local;
4e5ff376 1840
133d40f9 1841 mutex_lock(&local->mtx);
4e5ff376 1842 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1843 IEEE80211_STA_CONNECTION_POLL))) {
1844 mutex_unlock(&local->mtx);
1845 return;
1846 }
4e5ff376 1847
925e64c3 1848 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1849
1850 mutex_lock(&local->iflist_mtx);
1851 ieee80211_recalc_ps(local, -1);
1852 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1853
1854 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1855 goto out;
4e5ff376
FF		 1856
1857 /*
1858 * We've received a probe response, but are not sure whether
1859 * we have or will be receiving any beacons or data, so let's
1860 * schedule the timers again, just in case.
1861 */
1862 ieee80211_sta_reset_beacon_monitor(sdata);
1863
1864 mod_timer(&ifmgd->conn_mon_timer,
1865 round_jiffies_up(jiffies +
1866 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1867out:
133d40f9 1868 mutex_unlock(&local->mtx);
4e5ff376
FF		 1869}
1870
1871void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1872 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1873{
75706d0e 1874 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1875 return;
1876
4e5ff376
FF		 1877 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1878 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1879 if (ack)
cab1c7fd 1880 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1881 else
1882 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1883 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1884 return;
4e5ff376 1885 }
cab1c7fd
WD		 1886
1887 if (ack)
1888 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1889}
1890
a43abf29
ML		 1891static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1892{
1893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1894 const u8 *ssid;
f01a067d 1895 u8 *dst = ifmgd->associated->bssid;
180205bd 1896 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1897
1898 /*
1899 * Try sending broadcast probe requests for the last three
1900 * probe requests after the first ones failed since some
1901 * buggy APs only support broadcast probe requests.
1902 */
1903 if (ifmgd->probe_send_count >= unicast_limit)
1904 dst = NULL;
a43abf29 1905
4e5ff376
FF		 1906 /*
1907 * When the hardware reports an accurate Tx ACK status, it's
1908 * better to send a nullfunc frame instead of a probe request,
1909 * as it will kick us off the AP quickly if we aren't associated
1910 * anymore. The timeout will be reset if the frame is ACKed by
1911 * the AP.
1912 */
992e68bf
SD		 1913 ifmgd->probe_send_count++;
1914
04ac3c0e
FF		 1915 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1916 ifmgd->nullfunc_failed = false;
4e5ff376 1917 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1918 } else {
88c868c4
SG		 1919 int ssid_len;
1920
9caf0364 1921 rcu_read_lock();
4e5ff376 1922 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1923 if (WARN_ON_ONCE(ssid == NULL))
1924 ssid_len = 0;
1925 else
1926 ssid_len = ssid[1];
1927
1928 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1929 0, (u32) -1, true, 0,
55de908a 1930 ifmgd->associated->channel, false);
9caf0364 1931 rcu_read_unlock();
4e5ff376 1932 }
a43abf29 1933
180205bd 1934 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1935 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 1936 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1937 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1938}
1939
b291ba11
JB		 1940static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1941 bool beacon)
04de8381 1942{
04de8381 1943 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1944 bool already = false;
34bfc411 1945
9607e6b6 1946 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1947 return;
1948
77fdaa12
JB		 1949 mutex_lock(&ifmgd->mtx);
1950
1951 if (!ifmgd->associated)
1952 goto out;
1953
133d40f9
SG		 1954 mutex_lock(&sdata->local->mtx);
1955
1956 if (sdata->local->tmp_channel || sdata->local->scanning) {
1957 mutex_unlock(&sdata->local->mtx);
1958 goto out;
1959 }
1960
a13fbe54 1961 if (beacon) {
bdcbd8e0 1962 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1963 "detected beacon loss from AP (missed %d beacons) - probing\n",
1964 beacon_loss_count);
bdcbd8e0 1965
a13fbe54
BG		 1966 ieee80211_cqm_rssi_notify(&sdata->vif,
1967 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1968 GFP_KERNEL);
1969 }
04de8381 1970
b291ba11
JB		 1971 /*
1972 * The driver/our work has already reported this event or the
1973 * connection monitoring has kicked in and we have already sent
1974 * a probe request. Or maybe the AP died and the driver keeps
1975 * reporting until we disassociate...
1976 *
1977 * In either case we have to ignore the current call to this
1978 * function (except for setting the correct probe reason bit)
1979 * because otherwise we would reset the timer every time and
1980 * never check whether we received a probe response!
1981 */
1982 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1983 IEEE80211_STA_CONNECTION_POLL))
1984 already = true;
1985
1986 if (beacon)
1987 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1988 else
1989 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1990
133d40f9
SG		 1991 mutex_unlock(&sdata->local->mtx);
1992
b291ba11
JB		 1993 if (already)
1994 goto out;
1995
4e751843
JB		 1996 mutex_lock(&sdata->local->iflist_mtx);
1997 ieee80211_recalc_ps(sdata->local, -1);
1998 mutex_unlock(&sdata->local->iflist_mtx);
1999
a43abf29
ML		 2000 ifmgd->probe_send_count = 0;
2001 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2002 out:
2003 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2004}
2005
a619a4c0
JO		 2006struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2007 struct ieee80211_vif *vif)
2008{
2009 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2011 struct cfg80211_bss *cbss;
a619a4c0
JO		 2012 struct sk_buff *skb;
2013 const u8 *ssid;
88c868c4 2014 int ssid_len;
a619a4c0
JO		 2015
2016 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2017 return NULL;
2018
2019 ASSERT_MGD_MTX(ifmgd);
2020
d9b3b28b
EP		 2021 if (ifmgd->associated)
2022 cbss = ifmgd->associated;
2023 else if (ifmgd->auth_data)
2024 cbss = ifmgd->auth_data->bss;
2025 else if (ifmgd->assoc_data)
2026 cbss = ifmgd->assoc_data->bss;
2027 else
a619a4c0
JO		 2028 return NULL;
2029
9caf0364 2030 rcu_read_lock();
d9b3b28b 2031 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2032 if (WARN_ON_ONCE(ssid == NULL))
2033 ssid_len = 0;
2034 else
2035 ssid_len = ssid[1];
2036
d9b3b28b 2037 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2038 (u32) -1, cbss->channel,
6b77863b 2039 ssid + 2, ssid_len,
85a237fe 2040 NULL, 0, true);
9caf0364 2041 rcu_read_unlock();
a619a4c0
JO		 2042
2043 return skb;
2044}
2045EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2046
eef9e54c 2047static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2048{
2049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2050 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2051
2052 mutex_lock(&ifmgd->mtx);
2053 if (!ifmgd->associated) {
2054 mutex_unlock(&ifmgd->mtx);
2055 return;
2056 }
2057
37ad3888
JB		 2058 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2059 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2060 true, frame_buf);
882a7c69 2061 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2062 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2063 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2064 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2065 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2066
1e4dcd01
JO		 2067 /*
2068 * must be outside lock due to cfg80211,
2069 * but that's not a problem.
2070 */
6ae16775 2071 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2072}
2073
cc74c0c7 2074static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2075{
2076 struct ieee80211_sub_if_data *sdata =
2077 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2078 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2080 struct sta_info *sta;
2081
2082 if (ifmgd->associated) {
30fa9047 2083 rcu_read_lock();
a85e1d55
PS		 2084 sta = sta_info_get(sdata, ifmgd->bssid);
2085 if (sta)
2086 sta->beacon_loss_count++;
30fa9047 2087 rcu_read_unlock();
a85e1d55 2088 }
b291ba11 2089
682bd38b 2090 if (ifmgd->connection_loss) {
882a7c69
JB		 2091 sdata_info(sdata, "Connection to AP %pM lost\n",
2092 ifmgd->bssid);
eef9e54c 2093 __ieee80211_disconnect(sdata);
882a7c69 2094 } else {
1e4dcd01 2095 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2096 }
2097}
2098
2099static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2100{
2101 struct ieee80211_sub_if_data *sdata =
2102 container_of(work, struct ieee80211_sub_if_data,
2103 u.mgd.csa_connection_drop_work);
2104
eef9e54c 2105 __ieee80211_disconnect(sdata);
b291ba11
JB		 2106}
2107
04de8381
KV		 2108void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2109{
2110 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2111 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2112
b5878a2d
JB		 2113 trace_api_beacon_loss(sdata);
2114
1e4dcd01 2115 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2116 sdata->u.mgd.connection_loss = false;
1e4dcd01 2117 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2118}
2119EXPORT_SYMBOL(ieee80211_beacon_loss);
2120
1e4dcd01
JO		 2121void ieee80211_connection_loss(struct ieee80211_vif *vif)
2122{
2123 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2124 struct ieee80211_hw *hw = &sdata->local->hw;
2125
b5878a2d
JB		 2126 trace_api_connection_loss(sdata);
2127
682bd38b 2128 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2129 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2130}
2131EXPORT_SYMBOL(ieee80211_connection_loss);
2132
2133
66e67e41
JB		 2134static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2135 bool assoc)
2136{
2137 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2138
2139 lockdep_assert_held(&sdata->u.mgd.mtx);
2140
66e67e41
JB		 2141 if (!assoc) {
2142 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2143
2144 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2145 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2146 sdata->u.mgd.flags = 0;
55de908a 2147 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2148 }
2149
5b112d3d 2150 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2151 kfree(auth_data);
2152 sdata->u.mgd.auth_data = NULL;
2153}
2154
2155static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2156 struct ieee80211_mgmt *mgmt, size_t len)
2157{
1672c0e3 2158 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2159 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2160 u8 *pos;
2161 struct ieee802_11_elems elems;
1672c0e3 2162 u32 tx_flags = 0;
66e67e41
JB		 2163
2164 pos = mgmt->u.auth.variable;
2165 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2166 if (!elems.challenge)
2167 return;
2168 auth_data->expected_transaction = 4;
a1845fc7 2169 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2170 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2171 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2172 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2173 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2174 elems.challenge - 2, elems.challenge_len + 2,
2175 auth_data->bss->bssid, auth_data->bss->bssid,
2176 auth_data->key, auth_data->key_len,
1672c0e3 2177 auth_data->key_idx, tx_flags);
66e67e41
JB		 2178}
2179
2180static enum rx_mgmt_action __must_check
2181ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2182 struct ieee80211_mgmt *mgmt, size_t len)
2183{
2184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2185 u8 bssid[ETH_ALEN];
2186 u16 auth_alg, auth_transaction, status_code;
2187 struct sta_info *sta;
2188
2189 lockdep_assert_held(&ifmgd->mtx);
2190
2191 if (len < 24 + 6)
2192 return RX_MGMT_NONE;
2193
2194 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2195 return RX_MGMT_NONE;
2196
2197 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2198
b203ca39 2199 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2200 return RX_MGMT_NONE;
2201
2202 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2203 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2204 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2205
2206 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2207 auth_transaction != ifmgd->auth_data->expected_transaction) {
2208 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2209 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2210 auth_transaction,
2211 ifmgd->auth_data->expected_transaction);
66e67e41 2212 return RX_MGMT_NONE;
0f4126e8 2213 }
66e67e41
JB		 2214
2215 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2216 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2217 mgmt->sa, status_code);
dac211ec
EP		 2218 ieee80211_destroy_auth_data(sdata, false);
2219 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2220 }
2221
2222 switch (ifmgd->auth_data->algorithm) {
2223 case WLAN_AUTH_OPEN:
2224 case WLAN_AUTH_LEAP:
2225 case WLAN_AUTH_FT:
6b8ece3a 2226 case WLAN_AUTH_SAE:
66e67e41
JB		 2227 break;
2228 case WLAN_AUTH_SHARED_KEY:
2229 if (ifmgd->auth_data->expected_transaction != 4) {
2230 ieee80211_auth_challenge(sdata, mgmt, len);
2231 /* need another frame */
2232 return RX_MGMT_NONE;
2233 }
2234 break;
2235 default:
2236 WARN_ONCE(1, "invalid auth alg %d",
2237 ifmgd->auth_data->algorithm);
2238 return RX_MGMT_NONE;
2239 }
2240
bdcbd8e0 2241 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2242 ifmgd->auth_data->done = true;
2243 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2244 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2245 run_again(ifmgd, ifmgd->auth_data->timeout);
2246
6b8ece3a
JM		 2247 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2248 ifmgd->auth_data->expected_transaction != 2) {
2249 /*
2250 * Report auth frame to user space for processing since another
2251 * round of Authentication frames is still needed.
2252 */
2253 return RX_MGMT_CFG80211_RX_AUTH;
2254 }
2255
66e67e41
JB		 2256 /* move station state to auth */
2257 mutex_lock(&sdata->local->sta_mtx);
2258 sta = sta_info_get(sdata, bssid);
2259 if (!sta) {
2260 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2261 goto out_err;
2262 }
2263 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2264 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2265 goto out_err;
2266 }
2267 mutex_unlock(&sdata->local->sta_mtx);
2268
2269 return RX_MGMT_CFG80211_RX_AUTH;
2270 out_err:
2271 mutex_unlock(&sdata->local->sta_mtx);
2272 /* ignore frame -- wait for timeout */
2273 return RX_MGMT_NONE;
2274}
2275
2276
77fdaa12
JB		 2277static enum rx_mgmt_action __must_check
2278ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2279 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2280{
46900298 2281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2282 const u8 *bssid = NULL;
f0706e82
JB		 2283 u16 reason_code;
2284
66e67e41
JB		 2285 lockdep_assert_held(&ifmgd->mtx);
2286
f4ea83dd 2287 if (len < 24 + 2)
77fdaa12 2288 return RX_MGMT_NONE;
f0706e82 2289
66e67e41 2290 if (!ifmgd->associated ||
b203ca39 2291 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2292 return RX_MGMT_NONE;
77fdaa12 2293
0c1ad2ca 2294 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2295
2296 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2297
bdcbd8e0
JB		 2298 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2299 bssid, reason_code);
77fdaa12 2300
37ad3888
JB		 2301 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2302
77fdaa12 2303 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2304}
2305
2306
77fdaa12
JB		 2307static enum rx_mgmt_action __must_check
2308ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2309 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2310{
46900298 2311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2312 u16 reason_code;
2313
66e67e41 2314 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2315
66e67e41 2316 if (len < 24 + 2)
77fdaa12
JB		 2317 return RX_MGMT_NONE;
2318
66e67e41 2319 if (!ifmgd->associated ||
b203ca39 2320 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2321 return RX_MGMT_NONE;
f0706e82
JB		 2322
2323 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2324
bdcbd8e0
JB		 2325 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2326 mgmt->sa, reason_code);
f0706e82 2327
37ad3888
JB		 2328 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2329
77fdaa12 2330 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2331}
2332
c74d084f
CL		 2333static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2334 u8 *supp_rates, unsigned int supp_rates_len,
2335 u32 *rates, u32 *basic_rates,
2336 bool *have_higher_than_11mbit,
2337 int *min_rate, int *min_rate_index)
2338{
2339 int i, j;
2340
2341 for (i = 0; i < supp_rates_len; i++) {
2342 int rate = (supp_rates[i] & 0x7f) * 5;
2343 bool is_basic = !!(supp_rates[i] & 0x80);
2344
2345 if (rate > 110)
2346 *have_higher_than_11mbit = true;
2347
2348 /*
2349 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2350 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2351 *
2352 * Note: Even through the membership selector and the basic
2353 * rate flag share the same bit, they are not exactly
2354 * the same.
2355 */
2356 if (!!(supp_rates[i] & 0x80) &&
2357 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2358 continue;
2359
2360 for (j = 0; j < sband->n_bitrates; j++) {
2361 if (sband->bitrates[j].bitrate == rate) {
2362 *rates |= BIT(j);
2363 if (is_basic)
2364 *basic_rates |= BIT(j);
2365 if (rate < *min_rate) {
2366 *min_rate = rate;
2367 *min_rate_index = j;
2368 }
2369 break;
2370 }
2371 }
2372 }
2373}
f0706e82 2374
66e67e41
JB		 2375static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2376 bool assoc)
2377{
2378 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2379
2380 lockdep_assert_held(&sdata->u.mgd.mtx);
2381
66e67e41
JB		 2382 if (!assoc) {
2383 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2384
2385 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2386 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2387 sdata->u.mgd.flags = 0;
55de908a 2388 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2389 }
2390
2391 kfree(assoc_data);
2392 sdata->u.mgd.assoc_data = NULL;
2393}
2394
2395static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2396 struct cfg80211_bss *cbss,
af6b6374 2397 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2398{
46900298 2399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2400 struct ieee80211_local *local = sdata->local;
8318d78a 2401 struct ieee80211_supported_band *sband;
f0706e82 2402 struct sta_info *sta;
af6b6374 2403 u8 *pos;
af6b6374 2404 u16 capab_info, aid;
f0706e82 2405 struct ieee802_11_elems elems;
bda3933a 2406 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2407 u32 changed = 0;
c74d084f 2408 int err;
f0706e82 2409
af6b6374 2410 /* AssocResp and ReassocResp have identical structure */
f0706e82 2411
f0706e82 2412 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2413 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2414
1dd84aa2 2415 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2416 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2417 aid);
1dd84aa2
JB		 2418 aid &= ~(BIT(15) | BIT(14));
2419
05cb9108
JB		 2420 ifmgd->broken_ap = false;
2421
2422 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2423 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2424 aid);
05cb9108
JB		 2425 aid = 0;
2426 ifmgd->broken_ap = true;
2427 }
2428
af6b6374
JB		 2429 pos = mgmt->u.assoc_resp.variable;
2430 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2431
f0706e82 2432 if (!elems.supp_rates) {
bdcbd8e0 2433 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2434 return false;
f0706e82
JB		 2435 }
2436
46900298 2437 ifmgd->aid = aid;
f0706e82 2438
30eb1dc2
JB		 2439 /*
2440 * We previously checked these in the beacon/probe response, so
2441 * they should be present here. This is just a safety net.
2442 */
2443 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2444 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2445 sdata_info(sdata,
2446 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2447 return false;
2448 }
2449
2450 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2451 (!elems.vht_cap_elem || !elems.vht_operation)) {
2452 sdata_info(sdata,
2453 "VHT AP is missing VHT capability/operation in AssocResp\n");
2454 return false;
2455 }
2456
2a33bee2
GE		 2457 mutex_lock(&sdata->local->sta_mtx);
2458 /*
2459 * station info was already allocated and inserted before
2460 * the association and should be available to us
2461 */
7852e361 2462 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2463 if (WARN_ON(!sta)) {
2464 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2465 return false;
77fdaa12 2466 }
05e5e883 2467
55de908a 2468 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2469
30eb1dc2 2470 /* Set up internal HT/VHT capabilities */
a8243b72 2471 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2472 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2473 elems.ht_cap_elem, sta);
64f68e5d 2474
818255ea
MP		 2475 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2476 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2477 elems.vht_cap_elem, sta);
818255ea 2478
30eb1dc2
JB		 2479 /*
2480 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2481 * in their association response, so ignore that data for our own
2482 * configuration. If it changed since the last beacon, we'll get the
2483 * next beacon and update then.
2484 */
1128958d 2485
bee7f586
JB		 2486 /*
2487 * If an operating mode notification IE is present, override the
2488 * NSS calculation (that would be done in rate_control_rate_init())
2489 * and use the # of streams from that element.
2490 */
2491 if (elems.opmode_notif &&
2492 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2493 u8 nss;
2494
2495 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2496 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2497 nss += 1;
2498 sta->sta.rx_nss = nss;
2499 }
2500
4b7679a5 2501 rate_control_rate_init(sta);
f0706e82 2502
46900298 2503 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2504 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2505
ddf4ac53 2506 if (elems.wmm_param)
c2c98fde 2507 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2508
3e4d40fa 2509 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2510 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2511 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2512 if (err) {
bdcbd8e0
JB		 2513 sdata_info(sdata,
2514 "failed to move station %pM to desired state\n",
2515 sta->sta.addr);
c8987876
JB		 2516 WARN_ON(__sta_info_destroy(sta));
2517 mutex_unlock(&sdata->local->sta_mtx);
2518 return false;
2519 }
2520
7852e361 2521 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2522
f2176d72
JO		 2523 /*
2524 * Always handle WMM once after association regardless
2525 * of the first value the AP uses. Setting -1 here has
2526 * that effect because the AP values is an unsigned
2527 * 4-bit value.
2528 */
2529 ifmgd->wmm_last_param_set = -1;
2530
ddf4ac53 2531 if (elems.wmm_param)
4ced3f74 2532 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2533 elems.wmm_param_len);
aa837e1d 2534 else
3abead59
JB		 2535 ieee80211_set_wmm_default(sdata, false);
2536 changed |= BSS_CHANGED_QOS;
f0706e82 2537
60f8b39c
JB		 2538 /* set AID and assoc capability,
2539 * ieee80211_set_associated() will tell the driver */
2540 bss_conf->aid = aid;
2541 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2542 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2543
d524215f
FF		 2544 /*
2545 * If we're using 4-addr mode, let the AP know that we're
2546 * doing so, so that it can create the STA VLAN on its side
2547 */
2548 if (ifmgd->use_4addr)
2549 ieee80211_send_4addr_nullfunc(local, sdata);
2550
15b7b062 2551 /*
b291ba11
JB		 2552 * Start timer to probe the connection to the AP now.
2553 * Also start the timer that will detect beacon loss.
15b7b062 2554 */
b291ba11 2555 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2556 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2557
af6b6374 2558 return true;
f0706e82
JB		 2559}
2560
66e67e41
JB		 2561static enum rx_mgmt_action __must_check
2562ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2563 struct ieee80211_mgmt *mgmt, size_t len,
2564 struct cfg80211_bss **bss)
2565{
2566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2567 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2568 u16 capab_info, status_code, aid;
2569 struct ieee802_11_elems elems;
2570 u8 *pos;
2571 bool reassoc;
2572
2573 lockdep_assert_held(&ifmgd->mtx);
2574
2575 if (!assoc_data)
2576 return RX_MGMT_NONE;
b203ca39 2577 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2578 return RX_MGMT_NONE;
2579
2580 /*
2581 * AssocResp and ReassocResp have identical structure, so process both
2582 * of them in this function.
2583 */
2584
2585 if (len < 24 + 6)
2586 return RX_MGMT_NONE;
2587
2588 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2589 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2590 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2591 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2592
bdcbd8e0
JB		 2593 sdata_info(sdata,
2594 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2595 reassoc ? "Rea" : "A", mgmt->sa,
2596 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2597
2598 pos = mgmt->u.assoc_resp.variable;
2599 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2600
2601 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2602 elems.timeout_int &&
2603 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2604 u32 tu, ms;
79ba1d89 2605 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2606 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2607 sdata_info(sdata,
2608 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2609 mgmt->sa, tu, ms);
66e67e41 2610 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2611 assoc_data->timeout_started = true;
66e67e41
JB		 2612 if (ms > IEEE80211_ASSOC_TIMEOUT)
2613 run_again(ifmgd, assoc_data->timeout);
2614 return RX_MGMT_NONE;
2615 }
2616
2617 *bss = assoc_data->bss;
2618
2619 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2620 sdata_info(sdata, "%pM denied association (code=%d)\n",
2621 mgmt->sa, status_code);
66e67e41
JB		 2622 ieee80211_destroy_assoc_data(sdata, false);
2623 } else {
66e67e41
JB		 2624 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2625 /* oops -- internal error -- send timeout for now */
10a9109f 2626 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2627 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2628 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2629 }
635d999f 2630 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2631
2632 /*
2633 * destroy assoc_data afterwards, as otherwise an idle
2634 * recalc after assoc_data is NULL but before associated
2635 * is set can cause the interface to go idle
2636 */
2637 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2638 }
2639
2640 return RX_MGMT_CFG80211_RX_ASSOC;
2641}
8e3c1b77 2642
98c8fccf 2643static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2644 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2645 struct ieee80211_rx_status *rx_status,
d45c4172 2646 struct ieee802_11_elems *elems)
98c8fccf
JB		 2647{
2648 struct ieee80211_local *local = sdata->local;
2649 int freq;
c2b13452 2650 struct ieee80211_bss *bss;
98c8fccf 2651 struct ieee80211_channel *channel;
56007a02
JB		 2652 bool need_ps = false;
2653
b4f286a1
JB		 2654 lockdep_assert_held(&sdata->u.mgd.mtx);
2655
826262c3
JB		 2656 if ((sdata->u.mgd.associated &&
2657 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2658 (sdata->u.mgd.assoc_data &&
2659 ether_addr_equal(mgmt->bssid,
2660 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2661 /* not previously set so we may need to recalc */
826262c3
JB		 2662 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2663
2664 if (elems->tim && !elems->parse_error) {
4a3cb702 2665 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2666 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2667 }
56007a02 2668 }
98c8fccf 2669
1cd8e88e 2670 if (elems->ds_params)
59eb21a6
BR		 2671 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2672 rx_status->band);
98c8fccf
JB		 2673 else
2674 freq = rx_status->freq;
2675
2676 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2677
2678 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2679 return;
2680
98c8fccf 2681 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2682 channel);
77fdaa12
JB		 2683 if (bss)
2684 ieee80211_rx_bss_put(local, bss);
2685
37799e52
JB		 2686 if (!sdata->u.mgd.associated ||
2687 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
98c8fccf
JB		 2688 return;
2689
56007a02
JB		 2690 if (need_ps) {
2691 mutex_lock(&local->iflist_mtx);
2692 ieee80211_recalc_ps(local, -1);
2693 mutex_unlock(&local->iflist_mtx);
2694 }
2695
37799e52 2696 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, elems);
b4f286a1 2697
f0706e82
JB		 2698}
2699
2700
f698d856 2701static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2702 struct sk_buff *skb)
f0706e82 2703{
af6b6374 2704 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2705 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2706 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2707 size_t baselen, len = skb->len;
ae6a44e3
EK		 2708 struct ieee802_11_elems elems;
2709
15b7b062
KV		 2710 ifmgd = &sdata->u.mgd;
2711
77fdaa12
JB		 2712 ASSERT_MGD_MTX(ifmgd);
2713
b203ca39 2714 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2715 return; /* ignore ProbeResp to foreign address */
2716
ae6a44e3
EK		 2717 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2718 if (baselen > len)
2719 return;
2720
2721 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2722 &elems);
2723
d45c4172 2724 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2725
77fdaa12 2726 if (ifmgd->associated &&
b203ca39 2727 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2728 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2729
2730 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2731 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2732 /* got probe response, continue with auth */
bdcbd8e0 2733 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2734 ifmgd->auth_data->tries = 0;
2735 ifmgd->auth_data->timeout = jiffies;
89afe614 2736 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2737 run_again(ifmgd, ifmgd->auth_data->timeout);
2738 }
f0706e82
JB		 2739}
2740
d91f36db
JB		 2741/*
2742 * This is the canonical list of information elements we care about,
2743 * the filter code also gives us all changes to the Microsoft OUI
2744 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2745 *
2746 * We implement beacon filtering in software since that means we can
2747 * avoid processing the frame here and in cfg80211, and userspace
2748 * will not be able to tell whether the hardware supports it or not.
2749 *
2750 * XXX: This list needs to be dynamic -- userspace needs to be able to
2751 * add items it requires. It also needs to be able to tell us to
2752 * look out for other vendor IEs.
2753 */
2754static const u64 care_about_ies =
1d4df3a5
JB		 2755 (1ULL << WLAN_EID_COUNTRY) |
2756 (1ULL << WLAN_EID_ERP_INFO) |
2757 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2758 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2759 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2760 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2761
30eb1dc2
JB		 2762static enum rx_mgmt_action
2763ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2764 struct ieee80211_mgmt *mgmt, size_t len,
2765 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2766{
d91f36db 2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2768 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2769 size_t baselen;
2770 struct ieee802_11_elems elems;
f698d856 2771 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2772 struct ieee80211_chanctx_conf *chanctx_conf;
2773 struct ieee80211_channel *chan;
bee7f586 2774 struct sta_info *sta;
471b3efd 2775 u32 changed = 0;
f87ad637 2776 bool erp_valid;
7a5158ef 2777 u8 erp_value = 0;
d91f36db 2778 u32 ncrc;
77fdaa12
JB		 2779 u8 *bssid;
2780
66e67e41 2781 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2782
ae6a44e3
EK		 2783 /* Process beacon from the current BSS */
2784 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2785 if (baselen > len)
30eb1dc2 2786 return RX_MGMT_NONE;
ae6a44e3 2787
55de908a
JB		 2788 rcu_read_lock();
2789 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2790 if (!chanctx_conf) {
2791 rcu_read_unlock();
30eb1dc2 2792 return RX_MGMT_NONE;
55de908a
JB		 2793 }
2794
4bf88530 2795 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2796 rcu_read_unlock();
30eb1dc2 2797 return RX_MGMT_NONE;
55de908a 2798 }
4bf88530 2799 chan = chanctx_conf->def.chan;
55de908a 2800 rcu_read_unlock();
f0706e82 2801
c65dd147 2802 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2803 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2804 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2805 len - baselen, &elems);
77fdaa12 2806
d45c4172 2807 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2808 ifmgd->assoc_data->have_beacon = true;
c65dd147 2809 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2810 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2811 sdata->vif.bss_conf.sync_tsf =
2812 le64_to_cpu(mgmt->u.beacon.timestamp);
2813 sdata->vif.bss_conf.sync_device_ts =
2814 rx_status->device_timestamp;
2815 if (elems.tim)
2816 sdata->vif.bss_conf.sync_dtim_count =
2817 elems.tim->dtim_count;
2818 else
2819 sdata->vif.bss_conf.sync_dtim_count = 0;
2820 }
66e67e41
JB		 2821 /* continue assoc process */
2822 ifmgd->assoc_data->timeout = jiffies;
89afe614 2823 ifmgd->assoc_data->timeout_started = true;
66e67e41 2824 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2825 return RX_MGMT_NONE;
66e67e41 2826 }
77fdaa12 2827
66e67e41 2828 if (!ifmgd->associated ||
b203ca39 2829 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2830 return RX_MGMT_NONE;
66e67e41 2831 bssid = ifmgd->associated->bssid;
f0706e82 2832
17e4ec14
JM		 2833 /* Track average RSSI from the Beacon frames of the current AP */
2834 ifmgd->last_beacon_signal = rx_status->signal;
2835 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2836 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2837 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2838 ifmgd->last_cqm_event_signal = 0;
391a200a 2839 ifmgd->count_beacon_signal = 1;
615f7b9b 2840 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2841 } else {
2842 ifmgd->ave_beacon_signal =
2843 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2844 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2845 ifmgd->ave_beacon_signal) / 16;
391a200a 2846 ifmgd->count_beacon_signal++;
17e4ec14 2847 }
615f7b9b
MV		 2848
2849 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2850 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2851 int sig = ifmgd->ave_beacon_signal;
2852 int last_sig = ifmgd->last_ave_beacon_signal;
2853
2854 /*
2855 * if signal crosses either of the boundaries, invoke callback
2856 * with appropriate parameters
2857 */
2858 if (sig > ifmgd->rssi_max_thold &&
2859 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2860 ifmgd->last_ave_beacon_signal = sig;
887da917 2861 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2862 } else if (sig < ifmgd->rssi_min_thold &&
2863 (last_sig >= ifmgd->rssi_max_thold ||
2864 last_sig == 0)) {
2865 ifmgd->last_ave_beacon_signal = sig;
887da917 2866 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2867 }
2868 }
2869
17e4ec14 2870 if (bss_conf->cqm_rssi_thold &&
391a200a 2871 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2872 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2873 int sig = ifmgd->ave_beacon_signal / 16;
2874 int last_event = ifmgd->last_cqm_event_signal;
2875 int thold = bss_conf->cqm_rssi_thold;
2876 int hyst = bss_conf->cqm_rssi_hyst;
2877 if (sig < thold &&
2878 (last_event == 0 || sig < last_event - hyst)) {
2879 ifmgd->last_cqm_event_signal = sig;
2880 ieee80211_cqm_rssi_notify(
2881 &sdata->vif,
2882 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2883 GFP_KERNEL);
2884 } else if (sig > thold &&
2885 (last_event == 0 || sig > last_event + hyst)) {
2886 ifmgd->last_cqm_event_signal = sig;
2887 ieee80211_cqm_rssi_notify(
2888 &sdata->vif,
2889 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2890 GFP_KERNEL);
2891 }
2892 }
2893
b291ba11 2894 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2895 mlme_dbg_ratelimited(sdata,
112c31f0 2896 "cancelling AP probe due to a received beacon\n");
925e64c3 2897 mutex_lock(&local->mtx);
b291ba11 2898 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2899 ieee80211_run_deferred_scan(local);
2900 mutex_unlock(&local->mtx);
2901
4e751843
JB		 2902 mutex_lock(&local->iflist_mtx);
2903 ieee80211_recalc_ps(local, -1);
2904 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2905 }
2906
b291ba11
JB		 2907 /*
2908 * Push the beacon loss detection into the future since
2909 * we are processing a beacon from the AP just now.
2910 */
d3a910a8 2911 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2912
d91f36db
JB		 2913 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2914 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2915 len - baselen, &elems,
2916 care_about_ies, ncrc);
2917
25c9c875 2918 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2919 bool directed_tim = ieee80211_check_tim(elems.tim,
2920 elems.tim_len,
2921 ifmgd->aid);
1fb3606b 2922 if (directed_tim) {
572e0012 2923 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2924 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2925 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2926 ieee80211_hw_config(local,
2927 IEEE80211_CONF_CHANGE_PS);
2928 }
572e0012 2929 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2930 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2931 local->pspolling = true;
2932
2933 /*
2934 * Here is assumed that the driver will be
2935 * able to send ps-poll frame and receive a
2936 * response even though power save mode is
2937 * enabled, but some drivers might require
2938 * to disable power save here. This needs
2939 * to be investigated.
2940 */
2941 ieee80211_send_pspoll(local, sdata);
2942 }
a97b77b9
VN		 2943 }
2944 }
7a5158ef 2945
488dd7b5 2946 if (sdata->vif.p2p) {
67baf663 2947 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 2948 int ret;
2949
2950 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2951 len - baselen,
2952 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 2953 (u8 *) &noa, sizeof(noa));
67baf663
JD		 2954 if (ret >= 2) {
2955 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2956 /* valid noa_attr and index changed */
2957 sdata->u.mgd.p2p_noa_index = noa.index;
2958 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2959 changed |= BSS_CHANGED_P2P_PS;
2960 /*
2961 * make sure we update all information, the CRC
2962 * mechanism doesn't look at P2P attributes.
2963 */
2964 ifmgd->beacon_crc_valid = false;
2965 }
2966 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2967 /* noa_attr not found and we had valid noa_attr before */
2968 sdata->u.mgd.p2p_noa_index = -1;
2969 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 2970 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 2971 ifmgd->beacon_crc_valid = false;
2972 }
2973 }
2974
d8ec4433 2975 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2976 return RX_MGMT_NONE;
30196673 2977 ifmgd->beacon_crc = ncrc;
d8ec4433 2978 ifmgd->beacon_crc_valid = true;
30196673 2979
d45c4172 2980 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2981
2982 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2983 elems.wmm_param_len))
2984 changed |= BSS_CHANGED_QOS;
2985
c65dd147
EG		 2986 /*
2987 * If we haven't had a beacon before, tell the driver about the
ef429dad 2988 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2989 */
2990 if (!bss_conf->dtim_period) {
2991 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2992 if (elems.tim)
2993 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2994 else
2995 bss_conf->dtim_period = 1;
ef429dad
JB		 2996
2997 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2998 sdata->vif.bss_conf.sync_tsf =
2999 le64_to_cpu(mgmt->u.beacon.timestamp);
3000 sdata->vif.bss_conf.sync_device_ts =
3001 rx_status->device_timestamp;
3002 if (elems.tim)
3003 sdata->vif.bss_conf.sync_dtim_count =
3004 elems.tim->dtim_count;
3005 else
3006 sdata->vif.bss_conf.sync_dtim_count = 0;
3007 }
3008
c65dd147
EG		 3009 changed |= BSS_CHANGED_DTIM_PERIOD;
3010 }
3011
1946bed9 3012 if (elems.erp_info) {
7a5158ef
JB		 3013 erp_valid = true;
3014 erp_value = elems.erp_info[0];
3015 } else {
3016 erp_valid = false;
50c4afb9 3017 }
7a5158ef
JB		 3018 changed |= ieee80211_handle_bss_capability(sdata,
3019 le16_to_cpu(mgmt->u.beacon.capab_info),
3020 erp_valid, erp_value);
f0706e82 3021
1128958d 3022 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3023 sta = sta_info_get(sdata, bssid);
3024
30eb1dc2
JB		 3025 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3026 elems.vht_operation, bssid, &changed)) {
3027 mutex_unlock(&local->sta_mtx);
3028 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3029 WLAN_REASON_DEAUTH_LEAVING,
3030 true, deauth_buf);
3031 return RX_MGMT_CFG80211_TX_DEAUTH;
3032 }
bee7f586
JB		 3033
3034 if (sta && elems.opmode_notif)
3035 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3036 rx_status->band, true);
1128958d 3037 mutex_unlock(&local->sta_mtx);
d3c990fb 3038
04b7b2ff
JB		 3039 if (elems.country_elem && elems.pwr_constr_elem &&
3040 mgmt->u.probe_resp.capab_info &
3041 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3042 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3043 elems.country_elem,
3044 elems.country_elem_len,
3045 elems.pwr_constr_elem);
3f2355cb 3046
471b3efd 3047 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3048
3049 return RX_MGMT_NONE;
f0706e82
JB		 3050}
3051
1fa57d01
JB		 3052void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3053 struct sk_buff *skb)
f0706e82 3054{
77fdaa12 3055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3056 struct ieee80211_rx_status *rx_status;
f0706e82 3057 struct ieee80211_mgmt *mgmt;
66e67e41 3058 struct cfg80211_bss *bss = NULL;
77fdaa12 3059 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3060 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3061 u16 fc;
3062
f0706e82
JB		 3063 rx_status = (struct ieee80211_rx_status *) skb->cb;
3064 mgmt = (struct ieee80211_mgmt *) skb->data;
3065 fc = le16_to_cpu(mgmt->frame_control);
3066
77fdaa12
JB		 3067 mutex_lock(&ifmgd->mtx);
3068
66e67e41
JB		 3069 switch (fc & IEEE80211_FCTL_STYPE) {
3070 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3071 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3072 deauth_buf, rx_status);
66e67e41
JB		 3073 break;
3074 case IEEE80211_STYPE_PROBE_RESP:
3075 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3076 break;
3077 case IEEE80211_STYPE_AUTH:
3078 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3079 break;
3080 case IEEE80211_STYPE_DEAUTH:
3081 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3082 break;
3083 case IEEE80211_STYPE_DISASSOC:
3084 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3085 break;
3086 case IEEE80211_STYPE_ASSOC_RESP:
3087 case IEEE80211_STYPE_REASSOC_RESP:
3088 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3089 break;
3090 case IEEE80211_STYPE_ACTION:
37799e52
JB		 3091 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3092 struct ieee802_11_elems elems;
3093 int ies_len = skb->len -
3094 offsetof(struct ieee80211_mgmt,
3095 u.action.u.chan_switch.variable);
3096
3097 if (ies_len < 0)
3098 break;
3099
3100 ieee802_11_parse_elems(
3101 mgmt->u.action.u.chan_switch.variable,
3102 ies_len, &elems);
3103
3104 if (elems.parse_error)
3105 break;
3106
66e67e41 3107 ieee80211_sta_process_chanswitch(sdata,
37799e52
JB		 3108 rx_status->mactime,
3109 &elems);
77fdaa12 3110 }
37799e52 3111 break;
77fdaa12 3112 }
77fdaa12
JB		 3113 mutex_unlock(&ifmgd->mtx);
3114
66e67e41
JB		 3115 switch (rma) {
3116 case RX_MGMT_NONE:
3117 /* no action */
3118 break;
3119 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3120 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3121 break;
3122 case RX_MGMT_CFG80211_DISASSOC:
3123 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3124 break;
3125 case RX_MGMT_CFG80211_RX_AUTH:
3126 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3127 break;
3128 case RX_MGMT_CFG80211_RX_ASSOC:
3129 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3130 break;
3131 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3132 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3133 break;
30eb1dc2
JB		 3134 case RX_MGMT_CFG80211_TX_DEAUTH:
3135 cfg80211_send_deauth(sdata->dev, deauth_buf,
3136 sizeof(deauth_buf));
3137 break;
66e67e41
JB		 3138 default:
3139 WARN(1, "unexpected: %d", rma);
b054b747 3140 }
f0706e82
JB		 3141}
3142
9c6bd790 3143static void ieee80211_sta_timer(unsigned long data)
f0706e82 3144{
60f8b39c
JB		 3145 struct ieee80211_sub_if_data *sdata =
3146 (struct ieee80211_sub_if_data *) data;
5bb644a0 3147
9b7d72c1 3148 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3149}
3150
04ac3c0e 3151static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3152 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3153{
04ac3c0e 3154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3155 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3156
37ad3888 3157 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3158 tx, frame_buf);
04ac3c0e 3159 mutex_unlock(&ifmgd->mtx);
37ad3888 3160
04ac3c0e
FF		 3161 /*
3162 * must be outside lock due to cfg80211,
3163 * but that's not a problem.
3164 */
6ae16775 3165 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3166
04ac3c0e
FF		 3167 mutex_lock(&ifmgd->mtx);
3168}
3169
66e67e41
JB		 3170static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3171{
3172 struct ieee80211_local *local = sdata->local;
3173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3174 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3175 u32 tx_flags = 0;
66e67e41
JB		 3176
3177 lockdep_assert_held(&ifmgd->mtx);
3178
3179 if (WARN_ON_ONCE(!auth_data))
3180 return -EINVAL;
3181
1672c0e3
JB		 3182 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3183 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3184 IEEE80211_TX_INTFL_MLME_CONN_TX;
3185
66e67e41
JB		 3186 auth_data->tries++;
3187
3188 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3189 sdata_info(sdata, "authentication with %pM timed out\n",
3190 auth_data->bss->bssid);
66e67e41
JB		 3191
3192 /*
3193 * Most likely AP is not in the range so remove the
3194 * bss struct for that AP.
3195 */
3196 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3197
3198 return -ETIMEDOUT;
3199 }
3200
a1845fc7
JB		 3201 drv_mgd_prepare_tx(local, sdata);
3202
66e67e41 3203 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3204 u16 trans = 1;
3205 u16 status = 0;
3206
bdcbd8e0
JB		 3207 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3208 auth_data->bss->bssid, auth_data->tries,
3209 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3210
3211 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3212
3213 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3214 trans = auth_data->sae_trans;
3215 status = auth_data->sae_status;
3216 auth_data->expected_transaction = trans;
3217 }
3218
3219 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3220 auth_data->data, auth_data->data_len,
66e67e41 3221 auth_data->bss->bssid,
1672c0e3
JB		 3222 auth_data->bss->bssid, NULL, 0, 0,
3223 tx_flags);
66e67e41
JB		 3224 } else {
3225 const u8 *ssidie;
3226
bdcbd8e0
JB		 3227 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3228 auth_data->bss->bssid, auth_data->tries,
3229 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3230
9caf0364 3231 rcu_read_lock();
66e67e41 3232 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3233 if (!ssidie) {
3234 rcu_read_unlock();
66e67e41 3235 return -EINVAL;
9caf0364 3236 }
66e67e41
JB		 3237 /*
3238 * Direct probe is sent to broadcast address as some APs
3239 * will not answer to direct packet in unassociated state.
3240 */
3241 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3242 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3243 auth_data->bss->channel, false);
9caf0364 3244 rcu_read_unlock();
66e67e41
JB		 3245 }
3246
1672c0e3
JB		 3247 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3248 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3249 ifmgd->auth_data->timeout_started = true;
1672c0e3 3250 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3251 } else {
3252 auth_data->timeout_started = false;
1672c0e3 3253 }
66e67e41
JB		 3254
3255 return 0;
3256}
3257
3258static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3259{
3260 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3261 struct ieee80211_local *local = sdata->local;
3262
3263 lockdep_assert_held(&sdata->u.mgd.mtx);
3264
66e67e41
JB		 3265 assoc_data->tries++;
3266 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3267 sdata_info(sdata, "association with %pM timed out\n",
3268 assoc_data->bss->bssid);
66e67e41
JB		 3269
3270 /*
3271 * Most likely AP is not in the range so remove the
3272 * bss struct for that AP.
3273 */
3274 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3275
3276 return -ETIMEDOUT;
3277 }
3278
bdcbd8e0
JB		 3279 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3280 assoc_data->bss->bssid, assoc_data->tries,
3281 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3282 ieee80211_send_assoc(sdata);
3283
1672c0e3
JB		 3284 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3285 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3286 assoc_data->timeout_started = true;
1672c0e3 3287 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3288 } else {
3289 assoc_data->timeout_started = false;
1672c0e3 3290 }
66e67e41
JB		 3291
3292 return 0;
3293}
3294
1672c0e3
JB		 3295void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3296 __le16 fc, bool acked)
3297{
3298 struct ieee80211_local *local = sdata->local;
3299
3300 sdata->u.mgd.status_fc = fc;
3301 sdata->u.mgd.status_acked = acked;
3302 sdata->u.mgd.status_received = true;
3303
3304 ieee80211_queue_work(&local->hw, &sdata->work);
3305}
3306
1fa57d01 3307void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3308{
9c6bd790 3309 struct ieee80211_local *local = sdata->local;
1fa57d01 3310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3311
77fdaa12
JB		 3312 mutex_lock(&ifmgd->mtx);
3313
1672c0e3
JB		 3314 if (ifmgd->status_received) {
3315 __le16 fc = ifmgd->status_fc;
3316 bool status_acked = ifmgd->status_acked;
3317
3318 ifmgd->status_received = false;
3319 if (ifmgd->auth_data &&
3320 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3321 if (status_acked) {
3322 ifmgd->auth_data->timeout =
3323 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3324 run_again(ifmgd, ifmgd->auth_data->timeout);
3325 } else {
3326 ifmgd->auth_data->timeout = jiffies - 1;
3327 }
89afe614 3328 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3329 } else if (ifmgd->assoc_data &&
3330 (ieee80211_is_assoc_req(fc) ||
3331 ieee80211_is_reassoc_req(fc))) {
3332 if (status_acked) {
3333 ifmgd->assoc_data->timeout =
3334 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3335 run_again(ifmgd, ifmgd->assoc_data->timeout);
3336 } else {
3337 ifmgd->assoc_data->timeout = jiffies - 1;
3338 }
89afe614 3339 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3340 }
3341 }
3342
89afe614 3343 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3344 time_after(jiffies, ifmgd->auth_data->timeout)) {
3345 if (ifmgd->auth_data->done) {
3346 /*
3347 * ok ... we waited for assoc but userspace didn't,
3348 * so let's just kill the auth data
3349 */
3350 ieee80211_destroy_auth_data(sdata, false);
3351 } else if (ieee80211_probe_auth(sdata)) {
3352 u8 bssid[ETH_ALEN];
3353
3354 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3355
3356 ieee80211_destroy_auth_data(sdata, false);
3357
3358 mutex_unlock(&ifmgd->mtx);
3359 cfg80211_send_auth_timeout(sdata->dev, bssid);
3360 mutex_lock(&ifmgd->mtx);
3361 }
89afe614 3362 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3363 run_again(ifmgd, ifmgd->auth_data->timeout);
3364
89afe614 3365 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3366 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3367 if ((ifmgd->assoc_data->need_beacon &&
3368 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3369 ieee80211_do_assoc(sdata)) {
3370 u8 bssid[ETH_ALEN];
3371
3372 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3373
3374 ieee80211_destroy_assoc_data(sdata, false);
3375
3376 mutex_unlock(&ifmgd->mtx);
3377 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3378 mutex_lock(&ifmgd->mtx);
3379 }
89afe614 3380 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3381 run_again(ifmgd, ifmgd->assoc_data->timeout);
3382
b291ba11
JB		 3383 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3384 IEEE80211_STA_CONNECTION_POLL) &&
3385 ifmgd->associated) {
a43abf29 3386 u8 bssid[ETH_ALEN];
72a8a3ed 3387 int max_tries;
a43abf29 3388
0c1ad2ca 3389 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3390
72a8a3ed 3391 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3392 max_tries = max_nullfunc_tries;
72a8a3ed 3393 else
180205bd 3394 max_tries = max_probe_tries;
72a8a3ed 3395
4e5ff376
FF		 3396 /* ACK received for nullfunc probing frame */
3397 if (!ifmgd->probe_send_count)
3398 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3399 else if (ifmgd->nullfunc_failed) {
3400 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3401 mlme_dbg(sdata,
3402 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3403 bssid, ifmgd->probe_send_count,
3404 max_tries);
04ac3c0e
FF		 3405 ieee80211_mgd_probe_ap_send(sdata);
3406 } else {
bdcbd8e0
JB		 3407 mlme_dbg(sdata,
3408 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3409 bssid);
95acac61 3410 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3412 false);
04ac3c0e
FF		 3413 }
3414 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3415 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3416 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3417 mlme_dbg(sdata,
3418 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3419 bssid, probe_wait_ms);
95acac61 3420 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3421 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3422 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3423 mlme_dbg(sdata,
3424 "No probe response from AP %pM after %dms, try %d/%i\n",
3425 bssid, probe_wait_ms,
3426 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3427 ieee80211_mgd_probe_ap_send(sdata);
3428 } else {
b291ba11
JB		 3429 /*
3430 * We actually lost the connection ... or did we?
3431 * Let's make sure!
3432 */
b38afa87
BG		 3433 wiphy_debug(local->hw.wiphy,
3434 "%s: No probe response from AP %pM"
3435 " after %dms, disconnecting.\n",
3436 sdata->name,
180205bd 3437 bssid, probe_wait_ms);
04ac3c0e 3438
95acac61 3439 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3441 }
3442 }
3443
77fdaa12 3444 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3445}
3446
b291ba11
JB		 3447static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3448{
3449 struct ieee80211_sub_if_data *sdata =
3450 (struct ieee80211_sub_if_data *) data;
3451 struct ieee80211_local *local = sdata->local;
3452
3453 if (local->quiescing)
3454 return;
3455
682bd38b 3456 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3457 ieee80211_queue_work(&sdata->local->hw,
3458 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3459}
3460
3461static void ieee80211_sta_conn_mon_timer(unsigned long data)
3462{
3463 struct ieee80211_sub_if_data *sdata =
3464 (struct ieee80211_sub_if_data *) data;
3465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3466 struct ieee80211_local *local = sdata->local;
3467
3468 if (local->quiescing)
3469 return;
3470
42935eca 3471 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3472}
3473
3474static void ieee80211_sta_monitor_work(struct work_struct *work)
3475{
3476 struct ieee80211_sub_if_data *sdata =
3477 container_of(work, struct ieee80211_sub_if_data,
3478 u.mgd.monitor_work);
3479
3480 ieee80211_mgd_probe_ap(sdata, false);
3481}
3482
9c6bd790
JB		 3483static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3484{
494f1fe5
EP		 3485 u32 flags;
3486
ad935687 3487 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3488 __ieee80211_stop_poll(sdata);
ad935687 3489
b291ba11 3490 /* let's probe the connection once */
494f1fe5
EP		 3491 flags = sdata->local->hw.flags;
3492 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3493 ieee80211_queue_work(&sdata->local->hw,
3494 &sdata->u.mgd.monitor_work);
b291ba11 3495 /* and do all the other regular work too */
64592c8f 3496 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3497 }
9c6bd790 3498}
f0706e82 3499
9c6bd790
JB		 3500/* interface setup */
3501void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3502{
46900298 3503 struct ieee80211_if_managed *ifmgd;
988c0f72 3504
46900298 3505 ifmgd = &sdata->u.mgd;
b291ba11 3506 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3507 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3508 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3509 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3510 INIT_WORK(&ifmgd->csa_connection_drop_work,
3511 ieee80211_csa_connection_drop_work);
d1f5b7a3 3512 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3513 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3514 (unsigned long) sdata);
b291ba11
JB		 3515 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3516 (unsigned long) sdata);
3517 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3518 (unsigned long) sdata);
46900298 3519 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3520 (unsigned long) sdata);
9c6bd790 3521
ab1faead 3522 ifmgd->flags = 0;
1478acb3 3523 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3524 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3525 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3526 ifmgd->p2p_noa_index = -1;
bbbdff9e 3527
77fdaa12 3528 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3529
3530 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3531 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3532 else
3533 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3534}
3535
77fdaa12
JB		 3536/* scan finished notification */
3537void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3538{
31ee67a1 3539 struct ieee80211_sub_if_data *sdata;
60f8b39c 3540
77fdaa12
JB		 3541 /* Restart STA timers */
3542 rcu_read_lock();
3543 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3544 ieee80211_restart_sta_timer(sdata);
3545 rcu_read_unlock();
3546}
60f8b39c 3547
77fdaa12
JB		 3548int ieee80211_max_network_latency(struct notifier_block *nb,
3549 unsigned long data, void *dummy)
3550{
3551 s32 latency_usec = (s32) data;
3552 struct ieee80211_local *local =
3553 container_of(nb, struct ieee80211_local,
3554 network_latency_notifier);
1fa6f4af 3555
77fdaa12
JB		 3556 mutex_lock(&local->iflist_mtx);
3557 ieee80211_recalc_ps(local, latency_usec);
3558 mutex_unlock(&local->iflist_mtx);
dfe67012 3559
77fdaa12 3560 return 0;
9c6bd790
JB		 3561}
3562
f2d9d270
JB		 3563static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3564 struct cfg80211_bss *cbss)
3565{
3566 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3567 const u8 *ht_cap_ie, *vht_cap_ie;
3568 const struct ieee80211_ht_cap *ht_cap;
3569 const struct ieee80211_vht_cap *vht_cap;
3570 u8 chains = 1;
3571
3572 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3573 return chains;
3574
9caf0364 3575 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3576 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3577 ht_cap = (void *)(ht_cap_ie + 2);
3578 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3579 /*
3580 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3581 * "Tx Unequal Modulation Supported" fields.
3582 */
3583 }
3584
3585 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3586 return chains;
3587
9caf0364 3588 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3589 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3590 u8 nss;
3591 u16 tx_mcs_map;
3592
3593 vht_cap = (void *)(vht_cap_ie + 2);
3594 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3595 for (nss = 8; nss > 0; nss--) {
3596 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3597 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3598 break;
3599 }
3600 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3601 chains = max(chains, nss);
3602 }
3603
3604 return chains;
3605}
3606
b17166a7
JB		 3607static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3608 struct cfg80211_bss *cbss)
a1cf775d
JB		 3609{
3610 struct ieee80211_local *local = sdata->local;
3611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3612 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3613 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3614 struct ieee80211_supported_band *sband;
4bf88530 3615 struct cfg80211_chan_def chandef;
f2d9d270 3616 int ret;
a1cf775d 3617
24398e39
JB		 3618 sband = local->hw.wiphy->bands[cbss->channel->band];
3619
f2d9d270
JB		 3620 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3621 IEEE80211_STA_DISABLE_80P80MHZ |
3622 IEEE80211_STA_DISABLE_160MHZ);
3623
9caf0364
JB		 3624 rcu_read_lock();
3625
f2d9d270
JB		 3626 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3627 sband->ht_cap.ht_supported) {
08e6effa 3628 const u8 *ht_oper_ie, *ht_cap;
24398e39 3629
9caf0364 3630 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3631 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3632 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3633
3634 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3635 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3636 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3637 ht_oper = NULL;
3638 }
24398e39
JB		 3639 }
3640
f2d9d270
JB		 3641 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3642 sband->vht_cap.vht_supported) {
08e6effa 3643 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3644
9caf0364
JB		 3645 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3646 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3647 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3648 vht_oper = (void *)(vht_oper_ie + 2);
3649 if (vht_oper && !ht_oper) {
3650 vht_oper = NULL;
bdcbd8e0 3651 sdata_info(sdata,
f2d9d270 3652 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3653 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3654 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3655 }
08e6effa
JB		 3656
3657 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3658 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3659 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3660 vht_oper = NULL;
3661 }
24398e39
JB		 3662 }
3663
f2d9d270
JB		 3664 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3665 cbss->channel,
3666 ht_oper, vht_oper,
30eb1dc2 3667 &chandef, true);
04ecd257 3668
f2d9d270
JB		 3669 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3670 local->rx_chains);
24398e39 3671
9caf0364
JB		 3672 rcu_read_unlock();
3673
04ecd257
JB		 3674 /* will change later if needed */
3675 sdata->smps_mode = IEEE80211_SMPS_OFF;
3676
f2d9d270
JB		 3677 /*
3678 * If this fails (possibly due to channel context sharing
3679 * on incompatible channels, e.g. 80+80 and 160 sharing the
3680 * same control channel) try to use a smaller bandwidth.
3681 */
3682 ret = ieee80211_vif_use_channel(sdata, &chandef,
3683 IEEE80211_CHANCTX_SHARED);
d601cd8d 3684 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3685 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3686 ret = ieee80211_vif_use_channel(sdata, &chandef,
3687 IEEE80211_CHANCTX_SHARED);
3688 }
f2d9d270 3689 return ret;
b17166a7
JB		 3690}
3691
3692static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3693 struct cfg80211_bss *cbss, bool assoc)
3694{
3695 struct ieee80211_local *local = sdata->local;
3696 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3697 struct ieee80211_bss *bss = (void *)cbss->priv;
3698 struct sta_info *new_sta = NULL;
3699 bool have_sta = false;
3700 int err;
3701
3702 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3703 return -EINVAL;
3704
3705 if (assoc) {
3706 rcu_read_lock();
3707 have_sta = sta_info_get(sdata, cbss->bssid);
3708 rcu_read_unlock();
3709 }
3710
3711 if (!have_sta) {
3712 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3713 if (!new_sta)
3714 return -ENOMEM;
3715 }
3716
13e0c8e3 3717 if (new_sta) {
5d6a1b06
JB		 3718 u32 rates = 0, basic_rates = 0;
3719 bool have_higher_than_11mbit;
3720 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3721 struct ieee80211_supported_band *sband;
8cef2c9d 3722 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3723
3724 sband = local->hw.wiphy->bands[cbss->channel->band];
3725
3726 err = ieee80211_prep_channel(sdata, cbss);
3727 if (err) {
3728 sta_info_free(local, new_sta);
3729 return err;
3730 }
5d6a1b06 3731
5d6a1b06
JB		 3732 ieee80211_get_rates(sband, bss->supp_rates,
3733 bss->supp_rates_len,
3734 &rates, &basic_rates,
3735 &have_higher_than_11mbit,
3736 &min_rate, &min_rate_index);
3737
3738 /*
3739 * This used to be a workaround for basic rates missing
3740 * in the association response frame. Now that we no
3741 * longer use the basic rates from there, it probably
3742 * doesn't happen any more, but keep the workaround so
3743 * in case some *other* APs are buggy in different ways
3744 * we can connect -- with a warning.
3745 */
3746 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3747 sdata_info(sdata,
3748 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3749 basic_rates = BIT(min_rate_index);
3750 }
3751
13e0c8e3 3752 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3753 sdata->vif.bss_conf.basic_rates = basic_rates;
3754
3755 /* cf. IEEE 802.11 9.2.12 */
55de908a 3756 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3757 have_higher_than_11mbit)
3758 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3759 else
3760 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3761
3762 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3763
8c358bcd
JB		 3764 /* set timing information */
3765 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3766 rcu_read_lock();
ef429dad
JB		 3767 ies = rcu_dereference(cbss->beacon_ies);
3768 if (ies) {
3769 const u8 *tim_ie;
3770
3771 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3772 sdata->vif.bss_conf.sync_device_ts =
3773 bss->device_ts_beacon;
3774 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3775 ies->data, ies->len);
3776 if (tim_ie && tim_ie[1] >= 2)
3777 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3778 else
3779 sdata->vif.bss_conf.sync_dtim_count = 0;
3780 } else if (!(local->hw.flags &
3781 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3782 ies = rcu_dereference(cbss->proberesp_ies);
3783 /* must be non-NULL since beacon IEs were NULL */
3784 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3785 sdata->vif.bss_conf.sync_device_ts =
3786 bss->device_ts_presp;
3787 sdata->vif.bss_conf.sync_dtim_count = 0;
3788 } else {
3789 sdata->vif.bss_conf.sync_tsf = 0;
3790 sdata->vif.bss_conf.sync_device_ts = 0;
3791 sdata->vif.bss_conf.sync_dtim_count = 0;
3792 }
8cef2c9d 3793 rcu_read_unlock();
8c358bcd
JB		 3794
3795 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3796 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3797 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3798 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3799
3800 if (assoc)
13e0c8e3 3801 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3802
13e0c8e3
JB		 3803 err = sta_info_insert(new_sta);
3804 new_sta = NULL;
a1cf775d 3805 if (err) {
bdcbd8e0
JB		 3806 sdata_info(sdata,
3807 "failed to insert STA entry for the AP (error %d)\n",
3808 err);
a1cf775d
JB		 3809 return err;
3810 }
3811 } else
b203ca39 3812 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3813
3814 return 0;
3815}
3816
77fdaa12
JB		 3817/* config hooks */
3818int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3819 struct cfg80211_auth_request *req)
9c6bd790 3820{
66e67e41
JB		 3821 struct ieee80211_local *local = sdata->local;
3822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3823 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3824 u16 auth_alg;
66e67e41
JB		 3825 int err;
3826
3827 /* prepare auth data structure */
9c6bd790 3828
77fdaa12
JB		 3829 switch (req->auth_type) {
3830 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3831 auth_alg = WLAN_AUTH_OPEN;
3832 break;
3833 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3834 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3835 return -EOPNOTSUPP;
77fdaa12
JB		 3836 auth_alg = WLAN_AUTH_SHARED_KEY;
3837 break;
3838 case NL80211_AUTHTYPE_FT:
3839 auth_alg = WLAN_AUTH_FT;
3840 break;
3841 case NL80211_AUTHTYPE_NETWORK_EAP:
3842 auth_alg = WLAN_AUTH_LEAP;
3843 break;
6b8ece3a
JM		 3844 case NL80211_AUTHTYPE_SAE:
3845 auth_alg = WLAN_AUTH_SAE;
3846 break;
77fdaa12
JB		 3847 default:
3848 return -EOPNOTSUPP;
60f8b39c 3849 }
77fdaa12 3850
6b8ece3a
JM		 3851 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3852 req->ie_len, GFP_KERNEL);
66e67e41 3853 if (!auth_data)
9c6bd790 3854 return -ENOMEM;
77fdaa12 3855
66e67e41 3856 auth_data->bss = req->bss;
77fdaa12 3857
6b8ece3a
JM		 3858 if (req->sae_data_len >= 4) {
3859 __le16 *pos = (__le16 *) req->sae_data;
3860 auth_data->sae_trans = le16_to_cpu(pos[0]);
3861 auth_data->sae_status = le16_to_cpu(pos[1]);
3862 memcpy(auth_data->data, req->sae_data + 4,
3863 req->sae_data_len - 4);
3864 auth_data->data_len += req->sae_data_len - 4;
3865 }
3866
77fdaa12 3867 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3868 memcpy(&auth_data->data[auth_data->data_len],
3869 req->ie, req->ie_len);
3870 auth_data->data_len += req->ie_len;
9c6bd790 3871 }
77fdaa12 3872
fffd0934 3873 if (req->key && req->key_len) {
66e67e41
JB		 3874 auth_data->key_len = req->key_len;
3875 auth_data->key_idx = req->key_idx;
3876 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3877 }
3878
66e67e41 3879 auth_data->algorithm = auth_alg;
60f8b39c 3880
66e67e41 3881 /* try to authenticate/probe */
2a33bee2 3882
66e67e41 3883 mutex_lock(&ifmgd->mtx);
2a33bee2 3884
66e67e41
JB		 3885 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3886 ifmgd->assoc_data) {
3887 err = -EBUSY;
3888 goto err_free;
2a33bee2
GE		 3889 }
3890
66e67e41
JB		 3891 if (ifmgd->auth_data)
3892 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3893
66e67e41
JB		 3894 /* prep auth_data so we don't go into idle on disassoc */
3895 ifmgd->auth_data = auth_data;
af6b6374 3896
66e67e41 3897 if (ifmgd->associated)
37ad3888 3898 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3899
bdcbd8e0 3900 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3901
a1cf775d
JB		 3902 err = ieee80211_prep_connection(sdata, req->bss, false);
3903 if (err)
66e67e41 3904 goto err_clear;
af6b6374 3905
66e67e41
JB		 3906 err = ieee80211_probe_auth(sdata);
3907 if (err) {
66e67e41
JB		 3908 sta_info_destroy_addr(sdata, req->bss->bssid);
3909 goto err_clear;
3910 }
3911
3912 /* hold our own reference */
5b112d3d 3913 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3914 err = 0;
3915 goto out_unlock;
3916
3917 err_clear:
3d2abdfd
EP		 3918 memset(ifmgd->bssid, 0, ETH_ALEN);
3919 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3920 ifmgd->auth_data = NULL;
3921 err_free:
3922 kfree(auth_data);
3923 out_unlock:
3924 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3925
66e67e41 3926 return err;
af6b6374
JB		 3927}
3928
77fdaa12
JB		 3929int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3930 struct cfg80211_assoc_request *req)
f0706e82 3931{
66e67e41 3932 struct ieee80211_local *local = sdata->local;
77fdaa12 3933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3934 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3935 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3936 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3937 struct ieee80211_supported_band *sband;
b08fbbd8 3938 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3939 int i, err;
f0706e82 3940
66e67e41
JB		 3941 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3942 if (!assoc_data)
3943 return -ENOMEM;
3944
9caf0364
JB		 3945 rcu_read_lock();
3946 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3947 if (!ssidie) {
3948 rcu_read_unlock();
3949 kfree(assoc_data);
3950 return -EINVAL;
3951 }
3952 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3953 assoc_data->ssid_len = ssidie[1];
3954 rcu_read_unlock();
3955
77fdaa12 3956 mutex_lock(&ifmgd->mtx);
9c87ba67 3957
66e67e41 3958 if (ifmgd->associated)
37ad3888 3959 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3960
3961 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3962 err = -EBUSY;
3963 goto err_free;
af6b6374 3964 }
77fdaa12 3965
66e67e41
JB		 3966 if (ifmgd->assoc_data) {
3967 err = -EBUSY;
3968 goto err_free;
3969 }
77fdaa12 3970
66e67e41
JB		 3971 if (ifmgd->auth_data) {
3972 bool match;
3973
3974 /* keep sta info, bssid if matching */
b203ca39 3975 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3976 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3977 }
3978
66e67e41 3979 /* prepare assoc data */
19c3b830 3980
d8ec4433
JO		 3981 ifmgd->beacon_crc_valid = false;
3982
de5036aa
JB		 3983 /*
3984 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3985 * We still associate in non-HT mode (11a/b/g) if any one of these
3986 * ciphers is configured as pairwise.
3987 * We can set this to true for non-11n hardware, that'll be checked
3988 * separately along with the peer capabilities.
3989 */
1c4cb928 3990 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3991 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3992 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3993 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3994 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3995 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3996 netdev_info(sdata->dev,
d545daba 3997 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3998 }
3999 }
77fdaa12 4000
d545daba 4001 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4002 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4003 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4004 }
ef96a842 4005
dd5ecfea
JB		 4006 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4007 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4008
4e74bfdb
JB		 4009 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4010 sband = local->hw.wiphy->bands[req->bss->channel->band];
4011 if (!sband->ht_cap.ht_supported ||
1c4cb928 4012 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4013 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4014 if (!bss->wmm_used)
4015 netdev_info(sdata->dev,
4016 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4017 }
4e74bfdb 4018
d545daba
MP		 4019 /* disable VHT if we don't support it or the AP doesn't use WMM */
4020 if (!sband->vht_cap.vht_supported ||
4021 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4022 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4023 if (!bss->wmm_used)
4024 netdev_info(sdata->dev,
4025 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4026 }
4027
ef96a842
BG		 4028 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4029 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4030 sizeof(ifmgd->ht_capa_mask));
4031
dd5ecfea
JB		 4032 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4033 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4034 sizeof(ifmgd->vht_capa_mask));
4035
77fdaa12 4036 if (req->ie && req->ie_len) {
66e67e41
JB		 4037 memcpy(assoc_data->ie, req->ie, req->ie_len);
4038 assoc_data->ie_len = req->ie_len;
4039 }
f679f65d 4040
66e67e41 4041 assoc_data->bss = req->bss;
f679f65d 4042
af6b6374
JB		 4043 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4044 if (ifmgd->powersave)
04ecd257 4045 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4046 else
04ecd257 4047 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4048 } else
04ecd257 4049 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4050
66e67e41 4051 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4052 assoc_data->wmm = bss->wmm_used &&
4053 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4054 assoc_data->supp_rates = bss->supp_rates;
4055 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4056
9caf0364 4057 rcu_read_lock();
9dde6423
JB		 4058 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4059 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4060 assoc_data->ap_ht_param =
4061 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4062 else
a8243b72 4063 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4064 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4065 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4066 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4067 sizeof(struct ieee80211_vht_cap));
4068 else
4069 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4070 rcu_read_unlock();
63f170e0 4071
ab13315a 4072 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4073 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4074 sdata->wmm_acm != 0xff) {
76f0303d 4075 assoc_data->uapsd = true;
ab13315a
KV		 4076 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4077 } else {
76f0303d 4078 assoc_data->uapsd = false;
ab13315a
KV		 4079 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4080 }
4081
77fdaa12 4082 if (req->prev_bssid)
66e67e41 4083 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4084
4085 if (req->use_mfp) {
4086 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4087 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4088 } else {
4089 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4090 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4091 }
4092
4093 if (req->crypto.control_port)
4094 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4095 else
4096 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4097
a621fa4d
JB		 4098 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4099 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4100
66e67e41
JB		 4101 /* kick off associate process */
4102
4103 ifmgd->assoc_data = assoc_data;
826262c3 4104 ifmgd->dtim_period = 0;
66e67e41 4105
a1cf775d
JB		 4106 err = ieee80211_prep_connection(sdata, req->bss, true);
4107 if (err)
4108 goto err_clear;
66e67e41 4109
c65dd147
EG		 4110 rcu_read_lock();
4111 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4112
c65dd147
EG		 4113 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4114 !beacon_ies) {
4115 /*
4116 * Wait up to one beacon interval ...
4117 * should this be more if we miss one?
4118 */
4119 sdata_info(sdata, "waiting for beacon from %pM\n",
4120 ifmgd->bssid);
4121 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4122 assoc_data->timeout_started = true;
c65dd147
EG		 4123 assoc_data->need_beacon = true;
4124 } else if (beacon_ies) {
4125 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4126 beacon_ies->data,
4127 beacon_ies->len);
ef429dad
JB		 4128 u8 dtim_count = 0;
4129
c65dd147
EG		 4130 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4131 const struct ieee80211_tim_ie *tim;
4132 tim = (void *)(tim_ie + 2);
4133 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4134 dtim_count = tim->dtim_count;
826262c3 4135 }
66e67e41 4136 assoc_data->have_beacon = true;
66e67e41 4137 assoc_data->timeout = jiffies;
89afe614 4138 assoc_data->timeout_started = true;
ef429dad
JB		 4139
4140 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4141 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4142 sdata->vif.bss_conf.sync_device_ts =
4143 bss->device_ts_beacon;
4144 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4145 }
c65dd147
EG		 4146 } else {
4147 assoc_data->timeout = jiffies;
89afe614 4148 assoc_data->timeout_started = true;
66e67e41 4149 }
c65dd147
EG		 4150 rcu_read_unlock();
4151
66e67e41
JB		 4152 run_again(ifmgd, assoc_data->timeout);
4153
fcff4f10
PS		 4154 if (bss->corrupt_data) {
4155 char *corrupt_type = "data";
4156 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4157 if (bss->corrupt_data &
4158 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4159 corrupt_type = "beacon and probe response";
4160 else
4161 corrupt_type = "beacon";
4162 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4163 corrupt_type = "probe response";
bdcbd8e0
JB		 4164 sdata_info(sdata, "associating with AP with corrupt %s\n",
4165 corrupt_type);
fcff4f10
PS		 4166 }
4167
66e67e41
JB		 4168 err = 0;
4169 goto out;
4170 err_clear:
3d2abdfd
EP		 4171 memset(ifmgd->bssid, 0, ETH_ALEN);
4172 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4173 ifmgd->assoc_data = NULL;
4174 err_free:
4175 kfree(assoc_data);
4176 out:
4177 mutex_unlock(&ifmgd->mtx);
4178
4179 return err;
f0706e82
JB		 4180}
4181
77fdaa12 4182int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4183 struct cfg80211_deauth_request *req)
f0706e82 4184{
46900298 4185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4186 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4187 bool tx = !req->local_state_change;
86552017 4188 bool sent_frame = false;
f0706e82 4189
77fdaa12
JB		 4190 mutex_lock(&ifmgd->mtx);
4191
bdcbd8e0
JB		 4192 sdata_info(sdata,
4193 "deauthenticating from %pM by local choice (reason=%d)\n",
4194 req->bssid, req->reason_code);
0ff71613 4195
86552017 4196 if (ifmgd->auth_data) {
8c7d857c 4197 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4198 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4199 IEEE80211_STYPE_DEAUTH,
6863255b 4200 req->reason_code, tx,
37ad3888 4201 frame_buf);
86552017
JB		 4202 ieee80211_destroy_auth_data(sdata, false);
4203 mutex_unlock(&ifmgd->mtx);
4204
4205 sent_frame = tx;
4206 goto out;
8c7d857c
EG		 4207 }
4208
86552017
JB		 4209 if (ifmgd->associated &&
4210 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4211 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4212 req->reason_code, tx, frame_buf);
4213 sent_frame = tx;
4214 }
37ad3888
JB		 4215 mutex_unlock(&ifmgd->mtx);
4216
86552017 4217 out:
86552017
JB		 4218 if (sent_frame)
4219 __cfg80211_send_deauth(sdata->dev, frame_buf,
4220 IEEE80211_DEAUTH_FRAME_LEN);
4221
f0706e82
JB		 4222 return 0;
4223}
84363e6e 4224
77fdaa12 4225int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4226 struct cfg80211_disassoc_request *req)
9c6bd790 4227{
77fdaa12 4228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4229 u8 bssid[ETH_ALEN];
6ae16775 4230 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4231
77fdaa12 4232 mutex_lock(&ifmgd->mtx);
10f644a4 4233
8d8b261a
JB		 4234 /*
4235 * cfg80211 should catch this ... but it's racy since
4236 * we can receive a disassoc frame, process it, hand it
4237 * to cfg80211 while that's in a locked section already
4238 * trying to tell us that the user wants to disconnect.
4239 */
0c1ad2ca 4240 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4241 mutex_unlock(&ifmgd->mtx);
4242 return -ENOLINK;
4243 }
4244
bdcbd8e0
JB		 4245 sdata_info(sdata,
4246 "disassociating from %pM by local choice (reason=%d)\n",
4247 req->bss->bssid, req->reason_code);
0ff71613 4248
e69e95db 4249 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4250 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4251 req->reason_code, !req->local_state_change,
4252 frame_buf);
77fdaa12 4253 mutex_unlock(&ifmgd->mtx);
10f644a4 4254
6ae16775
AQ		 4255 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4256 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4257
10f644a4
JB		 4258 return 0;
4259}
026331c4 4260
afa762f6 4261void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4262{
4263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4264
49921859
BG		 4265 /*
4266 * Make sure some work items will not run after this,
4267 * they will not do anything but might not have been
4268 * cancelled when disconnecting.
4269 */
4270 cancel_work_sync(&ifmgd->monitor_work);
4271 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4272 cancel_work_sync(&ifmgd->request_smps_work);
4273 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4274 cancel_work_sync(&ifmgd->chswitch_work);
4275
54e4ffb2
JB		 4276 mutex_lock(&ifmgd->mtx);
4277 if (ifmgd->assoc_data)
4278 ieee80211_destroy_assoc_data(sdata, false);
4279 if (ifmgd->auth_data)
4280 ieee80211_destroy_auth_data(sdata, false);
4281 del_timer_sync(&ifmgd->timer);
4282 mutex_unlock(&ifmgd->mtx);
4283}
4284
a97c13c3
JO		 4285void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4286 enum nl80211_cqm_rssi_threshold_event rssi_event,
4287 gfp_t gfp)
4288{
4289 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4290
b5878a2d
JB		 4291 trace_api_cqm_rssi_notify(sdata, rssi_event);
4292
a97c13c3
JO		 4293 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4294}
4295EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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