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Merge tag 'for-3.11-rc1' of git://gitorious.org/linux-pwm/linux-pwm
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
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
40
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
50
51 /*
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.
58 */
59 static int beacon_loss_count = 7;
60 module_param(beacon_loss_count, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
63
64 /*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
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 */
74 static int probe_wait_ms = 500;
75 module_param(probe_wait_ms, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
79
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
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
93 /*
94 * We can have multiple work items (and connection probing)
95 * scheduling this timer, but we need to take care to only
96 * reschedule it when it should fire _earlier_ than it was
97 * asked for before, or if it's not pending right now. This
98 * function ensures that. Note that it then is required to
99 * run this function for all timeouts after the first one
100 * has happened -- the work that runs from this timer will
101 * do that.
102 */
103 static void run_again(struct ieee80211_sub_if_data *sdata,
104 unsigned long timeout)
105 {
106 sdata_assert_lock(sdata);
107
108 if (!timer_pending(&sdata->u.mgd.timer) ||
109 time_before(timeout, sdata->u.mgd.timer.expires))
110 mod_timer(&sdata->u.mgd.timer, timeout);
111 }
112
113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
114 {
115 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
116 return;
117
118 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
119 return;
120
121 mod_timer(&sdata->u.mgd.bcn_mon_timer,
122 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
123 }
124
125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
126 {
127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
128
129 if (unlikely(!sdata->u.mgd.associated))
130 return;
131
132 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133 return;
134
135 mod_timer(&sdata->u.mgd.conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137
138 ifmgd->probe_send_count = 0;
139 }
140
141 static int ecw2cw(int ecw)
142 {
143 return (1 << ecw) - 1;
144 }
145
146 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
147 {
148 u32 ret;
149 int tmp;
150
151 switch (c->width) {
152 case NL80211_CHAN_WIDTH_20:
153 c->width = NL80211_CHAN_WIDTH_20_NOHT;
154 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
155 break;
156 case NL80211_CHAN_WIDTH_40:
157 c->width = NL80211_CHAN_WIDTH_20;
158 c->center_freq1 = c->chan->center_freq;
159 ret = IEEE80211_STA_DISABLE_40MHZ |
160 IEEE80211_STA_DISABLE_VHT;
161 break;
162 case NL80211_CHAN_WIDTH_80:
163 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
164 /* n_P40 */
165 tmp /= 2;
166 /* freq_P40 */
167 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
168 c->width = NL80211_CHAN_WIDTH_40;
169 ret = IEEE80211_STA_DISABLE_VHT;
170 break;
171 case NL80211_CHAN_WIDTH_80P80:
172 c->center_freq2 = 0;
173 c->width = NL80211_CHAN_WIDTH_80;
174 ret = IEEE80211_STA_DISABLE_80P80MHZ |
175 IEEE80211_STA_DISABLE_160MHZ;
176 break;
177 case NL80211_CHAN_WIDTH_160:
178 /* n_P20 */
179 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
180 /* n_P80 */
181 tmp /= 4;
182 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
183 c->width = NL80211_CHAN_WIDTH_80;
184 ret = IEEE80211_STA_DISABLE_80P80MHZ |
185 IEEE80211_STA_DISABLE_160MHZ;
186 break;
187 default:
188 case NL80211_CHAN_WIDTH_20_NOHT:
189 WARN_ON_ONCE(1);
190 c->width = NL80211_CHAN_WIDTH_20_NOHT;
191 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
192 break;
193 case NL80211_CHAN_WIDTH_5:
194 case NL80211_CHAN_WIDTH_10:
195 WARN_ON_ONCE(1);
196 /* keep c->width */
197 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
198 break;
199 }
200
201 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
202
203 return ret;
204 }
205
206 static u32
207 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
208 struct ieee80211_supported_band *sband,
209 struct ieee80211_channel *channel,
210 const struct ieee80211_ht_operation *ht_oper,
211 const struct ieee80211_vht_operation *vht_oper,
212 struct cfg80211_chan_def *chandef, bool verbose)
213 {
214 struct cfg80211_chan_def vht_chandef;
215 u32 ht_cfreq, ret;
216
217 chandef->chan = channel;
218 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
219 chandef->center_freq1 = channel->center_freq;
220 chandef->center_freq2 = 0;
221
222 if (!ht_oper || !sband->ht_cap.ht_supported) {
223 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
224 goto out;
225 }
226
227 chandef->width = NL80211_CHAN_WIDTH_20;
228
229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
230 channel->band);
231 /* check that channel matches the right operating channel */
232 if (channel->center_freq != ht_cfreq) {
233 /*
234 * It's possible that some APs are confused here;
235 * Netgear WNDR3700 sometimes reports 4 higher than
236 * the actual channel in association responses, but
237 * since we look at probe response/beacon data here
238 * it should be OK.
239 */
240 if (verbose)
241 sdata_info(sdata,
242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
243 channel->center_freq, ht_cfreq,
244 ht_oper->primary_chan, channel->band);
245 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
246 goto out;
247 }
248
249 /* check 40 MHz support, if we have it */
250 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
251 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
252 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
253 chandef->width = NL80211_CHAN_WIDTH_40;
254 chandef->center_freq1 += 10;
255 break;
256 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
257 chandef->width = NL80211_CHAN_WIDTH_40;
258 chandef->center_freq1 -= 10;
259 break;
260 }
261 } else {
262 /* 40 MHz (and 80 MHz) must be supported for VHT */
263 ret = IEEE80211_STA_DISABLE_VHT;
264 /* also mark 40 MHz disabled */
265 ret |= IEEE80211_STA_DISABLE_40MHZ;
266 goto out;
267 }
268
269 if (!vht_oper || !sband->vht_cap.vht_supported) {
270 ret = IEEE80211_STA_DISABLE_VHT;
271 goto out;
272 }
273
274 vht_chandef.chan = channel;
275 vht_chandef.center_freq1 =
276 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
277 channel->band);
278 vht_chandef.center_freq2 = 0;
279
280 switch (vht_oper->chan_width) {
281 case IEEE80211_VHT_CHANWIDTH_USE_HT:
282 vht_chandef.width = chandef->width;
283 break;
284 case IEEE80211_VHT_CHANWIDTH_80MHZ:
285 vht_chandef.width = NL80211_CHAN_WIDTH_80;
286 break;
287 case IEEE80211_VHT_CHANWIDTH_160MHZ:
288 vht_chandef.width = NL80211_CHAN_WIDTH_160;
289 break;
290 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
291 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
292 vht_chandef.center_freq2 =
293 ieee80211_channel_to_frequency(
294 vht_oper->center_freq_seg2_idx,
295 channel->band);
296 break;
297 default:
298 if (verbose)
299 sdata_info(sdata,
300 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
301 vht_oper->chan_width);
302 ret = IEEE80211_STA_DISABLE_VHT;
303 goto out;
304 }
305
306 if (!cfg80211_chandef_valid(&vht_chandef)) {
307 if (verbose)
308 sdata_info(sdata,
309 "AP VHT information is invalid, disable VHT\n");
310 ret = IEEE80211_STA_DISABLE_VHT;
311 goto out;
312 }
313
314 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
315 ret = 0;
316 goto out;
317 }
318
319 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
320 if (verbose)
321 sdata_info(sdata,
322 "AP VHT information doesn't match HT, disable VHT\n");
323 ret = IEEE80211_STA_DISABLE_VHT;
324 goto out;
325 }
326
327 *chandef = vht_chandef;
328
329 ret = 0;
330
331 out:
332 /* don't print the message below for VHT mismatch if VHT is disabled */
333 if (ret & IEEE80211_STA_DISABLE_VHT)
334 vht_chandef = *chandef;
335
336 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
337 IEEE80211_CHAN_DISABLED)) {
338 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
339 ret = IEEE80211_STA_DISABLE_HT |
340 IEEE80211_STA_DISABLE_VHT;
341 goto out;
342 }
343
344 ret |= chandef_downgrade(chandef);
345 }
346
347 if (chandef->width != vht_chandef.width && verbose)
348 sdata_info(sdata,
349 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
350
351 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
352 return ret;
353 }
354
355 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
356 struct sta_info *sta,
357 const struct ieee80211_ht_operation *ht_oper,
358 const struct ieee80211_vht_operation *vht_oper,
359 const u8 *bssid, u32 *changed)
360 {
361 struct ieee80211_local *local = sdata->local;
362 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
363 struct ieee80211_supported_band *sband;
364 struct ieee80211_channel *chan;
365 struct cfg80211_chan_def chandef;
366 u16 ht_opmode;
367 u32 flags;
368 enum ieee80211_sta_rx_bandwidth new_sta_bw;
369 int ret;
370
371 /* if HT was/is disabled, don't track any bandwidth changes */
372 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
373 return 0;
374
375 /* don't check VHT if we associated as non-VHT station */
376 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
377 vht_oper = NULL;
378
379 if (WARN_ON_ONCE(!sta))
380 return -EINVAL;
381
382 chan = sdata->vif.bss_conf.chandef.chan;
383 sband = local->hw.wiphy->bands[chan->band];
384
385 /* calculate new channel (type) based on HT/VHT operation IEs */
386 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
387 vht_oper, &chandef, false);
388
389 /*
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
395 */
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
397 chandef.width == NL80211_CHAN_WIDTH_80P80)
398 flags |= chandef_downgrade(&chandef);
399 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
400 chandef.width == NL80211_CHAN_WIDTH_160)
401 flags |= chandef_downgrade(&chandef);
402 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
403 chandef.width > NL80211_CHAN_WIDTH_20)
404 flags |= chandef_downgrade(&chandef);
405
406 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
407 return 0;
408
409 sdata_info(sdata,
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
412 chandef.center_freq1, chandef.center_freq2);
413
414 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
415 IEEE80211_STA_DISABLE_VHT |
416 IEEE80211_STA_DISABLE_40MHZ |
417 IEEE80211_STA_DISABLE_80P80MHZ |
418 IEEE80211_STA_DISABLE_160MHZ)) ||
419 !cfg80211_chandef_valid(&chandef)) {
420 sdata_info(sdata,
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
422 ifmgd->bssid);
423 return -EINVAL;
424 }
425
426 switch (chandef.width) {
427 case NL80211_CHAN_WIDTH_20_NOHT:
428 case NL80211_CHAN_WIDTH_20:
429 new_sta_bw = IEEE80211_STA_RX_BW_20;
430 break;
431 case NL80211_CHAN_WIDTH_40:
432 new_sta_bw = IEEE80211_STA_RX_BW_40;
433 break;
434 case NL80211_CHAN_WIDTH_80:
435 new_sta_bw = IEEE80211_STA_RX_BW_80;
436 break;
437 case NL80211_CHAN_WIDTH_80P80:
438 case NL80211_CHAN_WIDTH_160:
439 new_sta_bw = IEEE80211_STA_RX_BW_160;
440 break;
441 default:
442 return -EINVAL;
443 }
444
445 if (new_sta_bw > sta->cur_max_bandwidth)
446 new_sta_bw = sta->cur_max_bandwidth;
447
448 if (new_sta_bw < sta->sta.bandwidth) {
449 sta->sta.bandwidth = new_sta_bw;
450 rate_control_rate_update(local, sband, sta,
451 IEEE80211_RC_BW_CHANGED);
452 }
453
454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
455 if (ret) {
456 sdata_info(sdata,
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
458 ifmgd->bssid);
459 return ret;
460 }
461
462 if (new_sta_bw > sta->sta.bandwidth) {
463 sta->sta.bandwidth = new_sta_bw;
464 rate_control_rate_update(local, sband, sta,
465 IEEE80211_RC_BW_CHANGED);
466 }
467
468 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
469
470 /* if bss configuration changed store the new one */
471 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
472 *changed |= BSS_CHANGED_HT;
473 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
474 }
475
476 return 0;
477 }
478
479 /* frame sending functions */
480
481 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
482 struct ieee80211_supported_band *sband,
483 u32 *rates)
484 {
485 int i, j, count;
486 *rates = 0;
487 count = 0;
488 for (i = 0; i < supp_rates_len; i++) {
489 int rate = (supp_rates[i] & 0x7F) * 5;
490
491 for (j = 0; j < sband->n_bitrates; j++)
492 if (sband->bitrates[j].bitrate == rate) {
493 *rates |= BIT(j);
494 count++;
495 break;
496 }
497 }
498
499 return count;
500 }
501
502 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
503 struct sk_buff *skb, u8 ap_ht_param,
504 struct ieee80211_supported_band *sband,
505 struct ieee80211_channel *channel,
506 enum ieee80211_smps_mode smps)
507 {
508 u8 *pos;
509 u32 flags = channel->flags;
510 u16 cap;
511 struct ieee80211_sta_ht_cap ht_cap;
512
513 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
514
515 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
516 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
517
518 /* determine capability flags */
519 cap = ht_cap.cap;
520
521 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
522 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
523 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
524 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525 cap &= ~IEEE80211_HT_CAP_SGI_40;
526 }
527 break;
528 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
529 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
530 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
531 cap &= ~IEEE80211_HT_CAP_SGI_40;
532 }
533 break;
534 }
535
536 /*
537 * If 40 MHz was disabled associate as though we weren't
538 * capable of 40 MHz -- some broken APs will never fall
539 * back to trying to transmit in 20 MHz.
540 */
541 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
542 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
543 cap &= ~IEEE80211_HT_CAP_SGI_40;
544 }
545
546 /* set SM PS mode properly */
547 cap &= ~IEEE80211_HT_CAP_SM_PS;
548 switch (smps) {
549 case IEEE80211_SMPS_AUTOMATIC:
550 case IEEE80211_SMPS_NUM_MODES:
551 WARN_ON(1);
552 case IEEE80211_SMPS_OFF:
553 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
554 IEEE80211_HT_CAP_SM_PS_SHIFT;
555 break;
556 case IEEE80211_SMPS_STATIC:
557 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
558 IEEE80211_HT_CAP_SM_PS_SHIFT;
559 break;
560 case IEEE80211_SMPS_DYNAMIC:
561 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
562 IEEE80211_HT_CAP_SM_PS_SHIFT;
563 break;
564 }
565
566 /* reserve and fill IE */
567 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
568 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
569 }
570
571 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
572 struct sk_buff *skb,
573 struct ieee80211_supported_band *sband,
574 struct ieee80211_vht_cap *ap_vht_cap)
575 {
576 u8 *pos;
577 u32 cap;
578 struct ieee80211_sta_vht_cap vht_cap;
579
580 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
581
582 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
583 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
584
585 /* determine capability flags */
586 cap = vht_cap.cap;
587
588 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
589 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
590 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
591 }
592
593 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
594 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
595 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
596 }
597
598 /*
599 * Some APs apparently get confused if our capabilities are better
600 * than theirs, so restrict what we advertise in the assoc request.
601 */
602 if (!(ap_vht_cap->vht_cap_info &
603 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
604 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
605
606 /* reserve and fill IE */
607 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
608 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
609 }
610
611 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
612 {
613 struct ieee80211_local *local = sdata->local;
614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
615 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
616 struct sk_buff *skb;
617 struct ieee80211_mgmt *mgmt;
618 u8 *pos, qos_info;
619 size_t offset = 0, noffset;
620 int i, count, rates_len, supp_rates_len;
621 u16 capab;
622 struct ieee80211_supported_band *sband;
623 struct ieee80211_chanctx_conf *chanctx_conf;
624 struct ieee80211_channel *chan;
625 u32 rates = 0;
626
627 sdata_assert_lock(sdata);
628
629 rcu_read_lock();
630 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
631 if (WARN_ON(!chanctx_conf)) {
632 rcu_read_unlock();
633 return;
634 }
635 chan = chanctx_conf->def.chan;
636 rcu_read_unlock();
637 sband = local->hw.wiphy->bands[chan->band];
638
639 if (assoc_data->supp_rates_len) {
640 /*
641 * Get all rates supported by the device and the AP as
642 * some APs don't like getting a superset of their rates
643 * in the association request (e.g. D-Link DAP 1353 in
644 * b-only mode)...
645 */
646 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
647 assoc_data->supp_rates_len,
648 sband, &rates);
649 } else {
650 /*
651 * In case AP not provide any supported rates information
652 * before association, we send information element(s) with
653 * all rates that we support.
654 */
655 rates = ~0;
656 rates_len = sband->n_bitrates;
657 }
658
659 skb = alloc_skb(local->hw.extra_tx_headroom +
660 sizeof(*mgmt) + /* bit too much but doesn't matter */
661 2 + assoc_data->ssid_len + /* SSID */
662 4 + rates_len + /* (extended) rates */
663 4 + /* power capability */
664 2 + 2 * sband->n_channels + /* supported channels */
665 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
666 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
667 assoc_data->ie_len + /* extra IEs */
668 9, /* WMM */
669 GFP_KERNEL);
670 if (!skb)
671 return;
672
673 skb_reserve(skb, local->hw.extra_tx_headroom);
674
675 capab = WLAN_CAPABILITY_ESS;
676
677 if (sband->band == IEEE80211_BAND_2GHZ) {
678 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
679 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
680 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
681 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
682 }
683
684 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
685 capab |= WLAN_CAPABILITY_PRIVACY;
686
687 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
688 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
689 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
690
691 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
692 memset(mgmt, 0, 24);
693 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
694 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
695 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
696
697 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
698 skb_put(skb, 10);
699 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
700 IEEE80211_STYPE_REASSOC_REQ);
701 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
702 mgmt->u.reassoc_req.listen_interval =
703 cpu_to_le16(local->hw.conf.listen_interval);
704 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
705 ETH_ALEN);
706 } else {
707 skb_put(skb, 4);
708 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
709 IEEE80211_STYPE_ASSOC_REQ);
710 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
711 mgmt->u.assoc_req.listen_interval =
712 cpu_to_le16(local->hw.conf.listen_interval);
713 }
714
715 /* SSID */
716 pos = skb_put(skb, 2 + assoc_data->ssid_len);
717 *pos++ = WLAN_EID_SSID;
718 *pos++ = assoc_data->ssid_len;
719 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
720
721 /* add all rates which were marked to be used above */
722 supp_rates_len = rates_len;
723 if (supp_rates_len > 8)
724 supp_rates_len = 8;
725
726 pos = skb_put(skb, supp_rates_len + 2);
727 *pos++ = WLAN_EID_SUPP_RATES;
728 *pos++ = supp_rates_len;
729
730 count = 0;
731 for (i = 0; i < sband->n_bitrates; i++) {
732 if (BIT(i) & rates) {
733 int rate = sband->bitrates[i].bitrate;
734 *pos++ = (u8) (rate / 5);
735 if (++count == 8)
736 break;
737 }
738 }
739
740 if (rates_len > count) {
741 pos = skb_put(skb, rates_len - count + 2);
742 *pos++ = WLAN_EID_EXT_SUPP_RATES;
743 *pos++ = rates_len - count;
744
745 for (i++; i < sband->n_bitrates; i++) {
746 if (BIT(i) & rates) {
747 int rate = sband->bitrates[i].bitrate;
748 *pos++ = (u8) (rate / 5);
749 }
750 }
751 }
752
753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
754 /* 1. power capabilities */
755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
759 *pos++ = chan->max_power; /* max tx power */
760
761 /* 2. supported channels */
762 /* TODO: get this in reg domain format */
763 pos = skb_put(skb, 2 * sband->n_channels + 2);
764 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
765 *pos++ = 2 * sband->n_channels;
766 for (i = 0; i < sband->n_channels; i++) {
767 *pos++ = ieee80211_frequency_to_channel(
768 sband->channels[i].center_freq);
769 *pos++ = 1; /* one channel in the subband*/
770 }
771 }
772
773 /* if present, add any custom IEs that go before HT */
774 if (assoc_data->ie_len && assoc_data->ie) {
775 static const u8 before_ht[] = {
776 WLAN_EID_SSID,
777 WLAN_EID_SUPP_RATES,
778 WLAN_EID_EXT_SUPP_RATES,
779 WLAN_EID_PWR_CAPABILITY,
780 WLAN_EID_SUPPORTED_CHANNELS,
781 WLAN_EID_RSN,
782 WLAN_EID_QOS_CAPA,
783 WLAN_EID_RRM_ENABLED_CAPABILITIES,
784 WLAN_EID_MOBILITY_DOMAIN,
785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
786 };
787 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
788 before_ht, ARRAY_SIZE(before_ht),
789 offset);
790 pos = skb_put(skb, noffset - offset);
791 memcpy(pos, assoc_data->ie + offset, noffset - offset);
792 offset = noffset;
793 }
794
795 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
796 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
797 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
798
799 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
800 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
801 sband, chan, sdata->smps_mode);
802
803 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
804 ieee80211_add_vht_ie(sdata, skb, sband,
805 &assoc_data->ap_vht_cap);
806
807 /* if present, add any custom non-vendor IEs that go after HT */
808 if (assoc_data->ie_len && assoc_data->ie) {
809 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
810 assoc_data->ie_len,
811 offset);
812 pos = skb_put(skb, noffset - offset);
813 memcpy(pos, assoc_data->ie + offset, noffset - offset);
814 offset = noffset;
815 }
816
817 if (assoc_data->wmm) {
818 if (assoc_data->uapsd) {
819 qos_info = ifmgd->uapsd_queues;
820 qos_info |= (ifmgd->uapsd_max_sp_len <<
821 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
822 } else {
823 qos_info = 0;
824 }
825
826 pos = skb_put(skb, 9);
827 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
828 *pos++ = 7; /* len */
829 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
830 *pos++ = 0x50;
831 *pos++ = 0xf2;
832 *pos++ = 2; /* WME */
833 *pos++ = 0; /* WME info */
834 *pos++ = 1; /* WME ver */
835 *pos++ = qos_info;
836 }
837
838 /* add any remaining custom (i.e. vendor specific here) IEs */
839 if (assoc_data->ie_len && assoc_data->ie) {
840 noffset = assoc_data->ie_len;
841 pos = skb_put(skb, noffset - offset);
842 memcpy(pos, assoc_data->ie + offset, noffset - offset);
843 }
844
845 drv_mgd_prepare_tx(local, sdata);
846
847 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
848 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
849 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
850 IEEE80211_TX_INTFL_MLME_CONN_TX;
851 ieee80211_tx_skb(sdata, skb);
852 }
853
854 void ieee80211_send_pspoll(struct ieee80211_local *local,
855 struct ieee80211_sub_if_data *sdata)
856 {
857 struct ieee80211_pspoll *pspoll;
858 struct sk_buff *skb;
859
860 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
861 if (!skb)
862 return;
863
864 pspoll = (struct ieee80211_pspoll *) skb->data;
865 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
866
867 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
868 ieee80211_tx_skb(sdata, skb);
869 }
870
871 void ieee80211_send_nullfunc(struct ieee80211_local *local,
872 struct ieee80211_sub_if_data *sdata,
873 int powersave)
874 {
875 struct sk_buff *skb;
876 struct ieee80211_hdr_3addr *nullfunc;
877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
878
879 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
880 if (!skb)
881 return;
882
883 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
884 if (powersave)
885 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
886
887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
888 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
889
890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
892
893 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
894 IEEE80211_STA_CONNECTION_POLL))
895 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
896
897 ieee80211_tx_skb(sdata, skb);
898 }
899
900 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
901 struct ieee80211_sub_if_data *sdata)
902 {
903 struct sk_buff *skb;
904 struct ieee80211_hdr *nullfunc;
905 __le16 fc;
906
907 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
908 return;
909
910 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
911 if (!skb)
912 return;
913
914 skb_reserve(skb, local->hw.extra_tx_headroom);
915
916 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
917 memset(nullfunc, 0, 30);
918 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
919 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
920 nullfunc->frame_control = fc;
921 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
922 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
923 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
924 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
925
926 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
927 ieee80211_tx_skb(sdata, skb);
928 }
929
930 /* spectrum management related things */
931 static void ieee80211_chswitch_work(struct work_struct *work)
932 {
933 struct ieee80211_sub_if_data *sdata =
934 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
935 struct ieee80211_local *local = sdata->local;
936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
937
938 if (!ieee80211_sdata_running(sdata))
939 return;
940
941 sdata_lock(sdata);
942 if (!ifmgd->associated)
943 goto out;
944
945 local->_oper_chandef = local->csa_chandef;
946
947 if (!local->ops->channel_switch) {
948 /* call "hw_config" only if doing sw channel switch */
949 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
950 } else {
951 /* update the device channel directly */
952 local->hw.conf.chandef = local->_oper_chandef;
953 }
954
955 /* XXX: shouldn't really modify cfg80211-owned data! */
956 ifmgd->associated->channel = local->_oper_chandef.chan;
957
958 /* XXX: wait for a beacon first? */
959 ieee80211_wake_queues_by_reason(&local->hw,
960 IEEE80211_MAX_QUEUE_MAP,
961 IEEE80211_QUEUE_STOP_REASON_CSA);
962 out:
963 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
964 sdata_unlock(sdata);
965 }
966
967 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
968 {
969 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
971
972 trace_api_chswitch_done(sdata, success);
973 if (!success) {
974 sdata_info(sdata,
975 "driver channel switch failed, disconnecting\n");
976 ieee80211_queue_work(&sdata->local->hw,
977 &ifmgd->csa_connection_drop_work);
978 } else {
979 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
980 }
981 }
982 EXPORT_SYMBOL(ieee80211_chswitch_done);
983
984 static void ieee80211_chswitch_timer(unsigned long data)
985 {
986 struct ieee80211_sub_if_data *sdata =
987 (struct ieee80211_sub_if_data *) data;
988
989 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
990 }
991
992 static void
993 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
994 u64 timestamp, struct ieee802_11_elems *elems,
995 bool beacon)
996 {
997 struct ieee80211_local *local = sdata->local;
998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
999 struct cfg80211_bss *cbss = ifmgd->associated;
1000 struct ieee80211_bss *bss;
1001 struct ieee80211_chanctx *chanctx;
1002 enum ieee80211_band new_band;
1003 int new_freq;
1004 u8 new_chan_no;
1005 u8 count;
1006 u8 mode;
1007 struct ieee80211_channel *new_chan;
1008 struct cfg80211_chan_def new_chandef = {};
1009 struct cfg80211_chan_def new_vht_chandef = {};
1010 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1011 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1012 const struct ieee80211_ht_operation *ht_oper;
1013 int secondary_channel_offset = -1;
1014
1015 sdata_assert_lock(sdata);
1016
1017 if (!cbss)
1018 return;
1019
1020 if (local->scanning)
1021 return;
1022
1023 /* disregard subsequent announcements if we are already processing */
1024 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1025 return;
1026
1027 sec_chan_offs = elems->sec_chan_offs;
1028 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1029 ht_oper = elems->ht_operation;
1030
1031 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1032 IEEE80211_STA_DISABLE_40MHZ)) {
1033 sec_chan_offs = NULL;
1034 wide_bw_chansw_ie = NULL;
1035 /* only used for bandwidth here */
1036 ht_oper = NULL;
1037 }
1038
1039 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1040 wide_bw_chansw_ie = NULL;
1041
1042 if (elems->ext_chansw_ie) {
1043 if (!ieee80211_operating_class_to_band(
1044 elems->ext_chansw_ie->new_operating_class,
1045 &new_band)) {
1046 sdata_info(sdata,
1047 "cannot understand ECSA IE operating class %d, disconnecting\n",
1048 elems->ext_chansw_ie->new_operating_class);
1049 ieee80211_queue_work(&local->hw,
1050 &ifmgd->csa_connection_drop_work);
1051 }
1052 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1053 count = elems->ext_chansw_ie->count;
1054 mode = elems->ext_chansw_ie->mode;
1055 } else if (elems->ch_switch_ie) {
1056 new_band = cbss->channel->band;
1057 new_chan_no = elems->ch_switch_ie->new_ch_num;
1058 count = elems->ch_switch_ie->count;
1059 mode = elems->ch_switch_ie->mode;
1060 } else {
1061 /* nothing here we understand */
1062 return;
1063 }
1064
1065 bss = (void *)cbss->priv;
1066
1067 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1068 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1069 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1070 sdata_info(sdata,
1071 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1072 ifmgd->associated->bssid, new_freq);
1073 ieee80211_queue_work(&local->hw,
1074 &ifmgd->csa_connection_drop_work);
1075 return;
1076 }
1077
1078 if (!beacon && sec_chan_offs) {
1079 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1080 } else if (beacon && ht_oper) {
1081 secondary_channel_offset =
1082 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1083 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1084 /*
1085 * If it's not a beacon, HT is enabled and the IE not present,
1086 * it's 20 MHz, 802.11-2012 8.5.2.6:
1087 * This element [the Secondary Channel Offset Element] is
1088 * present when switching to a 40 MHz channel. It may be
1089 * present when switching to a 20 MHz channel (in which
1090 * case the secondary channel offset is set to SCN).
1091 */
1092 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1093 }
1094
1095 switch (secondary_channel_offset) {
1096 default:
1097 /* secondary_channel_offset was present but is invalid */
1098 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1099 cfg80211_chandef_create(&new_chandef, new_chan,
1100 NL80211_CHAN_HT20);
1101 break;
1102 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1103 cfg80211_chandef_create(&new_chandef, new_chan,
1104 NL80211_CHAN_HT40PLUS);
1105 break;
1106 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1107 cfg80211_chandef_create(&new_chandef, new_chan,
1108 NL80211_CHAN_HT40MINUS);
1109 break;
1110 case -1:
1111 cfg80211_chandef_create(&new_chandef, new_chan,
1112 NL80211_CHAN_NO_HT);
1113 break;
1114 }
1115
1116 if (wide_bw_chansw_ie) {
1117 new_vht_chandef.chan = new_chan;
1118 new_vht_chandef.center_freq1 =
1119 ieee80211_channel_to_frequency(
1120 wide_bw_chansw_ie->new_center_freq_seg0,
1121 new_band);
1122
1123 switch (wide_bw_chansw_ie->new_channel_width) {
1124 default:
1125 /* hmmm, ignore VHT and use HT if present */
1126 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1127 new_vht_chandef.chan = NULL;
1128 break;
1129 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1130 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1131 break;
1132 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1133 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1134 break;
1135 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1136 /* field is otherwise reserved */
1137 new_vht_chandef.center_freq2 =
1138 ieee80211_channel_to_frequency(
1139 wide_bw_chansw_ie->new_center_freq_seg1,
1140 new_band);
1141 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1142 break;
1143 }
1144 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1145 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1146 chandef_downgrade(&new_vht_chandef);
1147 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1148 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1149 chandef_downgrade(&new_vht_chandef);
1150 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1151 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1152 chandef_downgrade(&new_vht_chandef);
1153 }
1154
1155 /* if VHT data is there validate & use it */
1156 if (new_vht_chandef.chan) {
1157 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1158 &new_chandef)) {
1159 sdata_info(sdata,
1160 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1161 ifmgd->associated->bssid);
1162 ieee80211_queue_work(&local->hw,
1163 &ifmgd->csa_connection_drop_work);
1164 return;
1165 }
1166 new_chandef = new_vht_chandef;
1167 }
1168
1169 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1170 IEEE80211_CHAN_DISABLED)) {
1171 sdata_info(sdata,
1172 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1173 ifmgd->associated->bssid, new_freq,
1174 new_chandef.width, new_chandef.center_freq1,
1175 new_chandef.center_freq2);
1176 ieee80211_queue_work(&local->hw,
1177 &ifmgd->csa_connection_drop_work);
1178 return;
1179 }
1180
1181 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1182
1183 if (local->use_chanctx) {
1184 sdata_info(sdata,
1185 "not handling channel switch with channel contexts\n");
1186 ieee80211_queue_work(&local->hw,
1187 &ifmgd->csa_connection_drop_work);
1188 return;
1189 }
1190
1191 mutex_lock(&local->chanctx_mtx);
1192 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1193 mutex_unlock(&local->chanctx_mtx);
1194 return;
1195 }
1196 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1197 struct ieee80211_chanctx, conf);
1198 if (chanctx->refcount > 1) {
1199 sdata_info(sdata,
1200 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1201 ieee80211_queue_work(&local->hw,
1202 &ifmgd->csa_connection_drop_work);
1203 mutex_unlock(&local->chanctx_mtx);
1204 return;
1205 }
1206 mutex_unlock(&local->chanctx_mtx);
1207
1208 local->csa_chandef = new_chandef;
1209
1210 if (mode)
1211 ieee80211_stop_queues_by_reason(&local->hw,
1212 IEEE80211_MAX_QUEUE_MAP,
1213 IEEE80211_QUEUE_STOP_REASON_CSA);
1214
1215 if (local->ops->channel_switch) {
1216 /* use driver's channel switch callback */
1217 struct ieee80211_channel_switch ch_switch = {
1218 .timestamp = timestamp,
1219 .block_tx = mode,
1220 .chandef = new_chandef,
1221 .count = count,
1222 };
1223
1224 drv_channel_switch(local, &ch_switch);
1225 return;
1226 }
1227
1228 /* channel switch handled in software */
1229 if (count <= 1)
1230 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1231 else
1232 mod_timer(&ifmgd->chswitch_timer,
1233 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1234 }
1235
1236 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1237 struct ieee80211_channel *channel,
1238 const u8 *country_ie, u8 country_ie_len,
1239 const u8 *pwr_constr_elem)
1240 {
1241 struct ieee80211_country_ie_triplet *triplet;
1242 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1243 int i, chan_pwr, chan_increment, new_ap_level;
1244 bool have_chan_pwr = false;
1245
1246 /* Invalid IE */
1247 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1248 return 0;
1249
1250 triplet = (void *)(country_ie + 3);
1251 country_ie_len -= 3;
1252
1253 switch (channel->band) {
1254 default:
1255 WARN_ON_ONCE(1);
1256 /* fall through */
1257 case IEEE80211_BAND_2GHZ:
1258 case IEEE80211_BAND_60GHZ:
1259 chan_increment = 1;
1260 break;
1261 case IEEE80211_BAND_5GHZ:
1262 chan_increment = 4;
1263 break;
1264 }
1265
1266 /* find channel */
1267 while (country_ie_len >= 3) {
1268 u8 first_channel = triplet->chans.first_channel;
1269
1270 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1271 goto next;
1272
1273 for (i = 0; i < triplet->chans.num_channels; i++) {
1274 if (first_channel + i * chan_increment == chan) {
1275 have_chan_pwr = true;
1276 chan_pwr = triplet->chans.max_power;
1277 break;
1278 }
1279 }
1280 if (have_chan_pwr)
1281 break;
1282
1283 next:
1284 triplet++;
1285 country_ie_len -= 3;
1286 }
1287
1288 if (!have_chan_pwr)
1289 return 0;
1290
1291 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1292
1293 if (sdata->ap_power_level == new_ap_level)
1294 return 0;
1295
1296 sdata_info(sdata,
1297 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1298 new_ap_level, chan_pwr, *pwr_constr_elem,
1299 sdata->u.mgd.bssid);
1300 sdata->ap_power_level = new_ap_level;
1301 if (__ieee80211_recalc_txpower(sdata))
1302 return BSS_CHANGED_TXPOWER;
1303 return 0;
1304 }
1305
1306 /* powersave */
1307 static void ieee80211_enable_ps(struct ieee80211_local *local,
1308 struct ieee80211_sub_if_data *sdata)
1309 {
1310 struct ieee80211_conf *conf = &local->hw.conf;
1311
1312 /*
1313 * If we are scanning right now then the parameters will
1314 * take effect when scan finishes.
1315 */
1316 if (local->scanning)
1317 return;
1318
1319 if (conf->dynamic_ps_timeout > 0 &&
1320 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1321 mod_timer(&local->dynamic_ps_timer, jiffies +
1322 msecs_to_jiffies(conf->dynamic_ps_timeout));
1323 } else {
1324 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1325 ieee80211_send_nullfunc(local, sdata, 1);
1326
1327 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1328 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1329 return;
1330
1331 conf->flags |= IEEE80211_CONF_PS;
1332 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1333 }
1334 }
1335
1336 static void ieee80211_change_ps(struct ieee80211_local *local)
1337 {
1338 struct ieee80211_conf *conf = &local->hw.conf;
1339
1340 if (local->ps_sdata) {
1341 ieee80211_enable_ps(local, local->ps_sdata);
1342 } else if (conf->flags & IEEE80211_CONF_PS) {
1343 conf->flags &= ~IEEE80211_CONF_PS;
1344 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1345 del_timer_sync(&local->dynamic_ps_timer);
1346 cancel_work_sync(&local->dynamic_ps_enable_work);
1347 }
1348 }
1349
1350 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1351 {
1352 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1353 struct sta_info *sta = NULL;
1354 bool authorized = false;
1355
1356 if (!mgd->powersave)
1357 return false;
1358
1359 if (mgd->broken_ap)
1360 return false;
1361
1362 if (!mgd->associated)
1363 return false;
1364
1365 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1366 IEEE80211_STA_CONNECTION_POLL))
1367 return false;
1368
1369 if (!mgd->have_beacon)
1370 return false;
1371
1372 rcu_read_lock();
1373 sta = sta_info_get(sdata, mgd->bssid);
1374 if (sta)
1375 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1376 rcu_read_unlock();
1377
1378 return authorized;
1379 }
1380
1381 /* need to hold RTNL or interface lock */
1382 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1383 {
1384 struct ieee80211_sub_if_data *sdata, *found = NULL;
1385 int count = 0;
1386 int timeout;
1387
1388 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1389 local->ps_sdata = NULL;
1390 return;
1391 }
1392
1393 list_for_each_entry(sdata, &local->interfaces, list) {
1394 if (!ieee80211_sdata_running(sdata))
1395 continue;
1396 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1397 /* If an AP vif is found, then disable PS
1398 * by setting the count to zero thereby setting
1399 * ps_sdata to NULL.
1400 */
1401 count = 0;
1402 break;
1403 }
1404 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1405 continue;
1406 found = sdata;
1407 count++;
1408 }
1409
1410 if (count == 1 && ieee80211_powersave_allowed(found)) {
1411 s32 beaconint_us;
1412
1413 if (latency < 0)
1414 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1415
1416 beaconint_us = ieee80211_tu_to_usec(
1417 found->vif.bss_conf.beacon_int);
1418
1419 timeout = local->dynamic_ps_forced_timeout;
1420 if (timeout < 0) {
1421 /*
1422 * Go to full PSM if the user configures a very low
1423 * latency requirement.
1424 * The 2000 second value is there for compatibility
1425 * until the PM_QOS_NETWORK_LATENCY is configured
1426 * with real values.
1427 */
1428 if (latency > (1900 * USEC_PER_MSEC) &&
1429 latency != (2000 * USEC_PER_SEC))
1430 timeout = 0;
1431 else
1432 timeout = 100;
1433 }
1434 local->hw.conf.dynamic_ps_timeout = timeout;
1435
1436 if (beaconint_us > latency) {
1437 local->ps_sdata = NULL;
1438 } else {
1439 int maxslp = 1;
1440 u8 dtimper = found->u.mgd.dtim_period;
1441
1442 /* If the TIM IE is invalid, pretend the value is 1 */
1443 if (!dtimper)
1444 dtimper = 1;
1445 else if (dtimper > 1)
1446 maxslp = min_t(int, dtimper,
1447 latency / beaconint_us);
1448
1449 local->hw.conf.max_sleep_period = maxslp;
1450 local->hw.conf.ps_dtim_period = dtimper;
1451 local->ps_sdata = found;
1452 }
1453 } else {
1454 local->ps_sdata = NULL;
1455 }
1456
1457 ieee80211_change_ps(local);
1458 }
1459
1460 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1461 {
1462 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1463
1464 if (sdata->vif.bss_conf.ps != ps_allowed) {
1465 sdata->vif.bss_conf.ps = ps_allowed;
1466 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1467 }
1468 }
1469
1470 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1471 {
1472 struct ieee80211_local *local =
1473 container_of(work, struct ieee80211_local,
1474 dynamic_ps_disable_work);
1475
1476 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1477 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1478 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1479 }
1480
1481 ieee80211_wake_queues_by_reason(&local->hw,
1482 IEEE80211_MAX_QUEUE_MAP,
1483 IEEE80211_QUEUE_STOP_REASON_PS);
1484 }
1485
1486 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1487 {
1488 struct ieee80211_local *local =
1489 container_of(work, struct ieee80211_local,
1490 dynamic_ps_enable_work);
1491 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1492 struct ieee80211_if_managed *ifmgd;
1493 unsigned long flags;
1494 int q;
1495
1496 /* can only happen when PS was just disabled anyway */
1497 if (!sdata)
1498 return;
1499
1500 ifmgd = &sdata->u.mgd;
1501
1502 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1503 return;
1504
1505 if (local->hw.conf.dynamic_ps_timeout > 0) {
1506 /* don't enter PS if TX frames are pending */
1507 if (drv_tx_frames_pending(local)) {
1508 mod_timer(&local->dynamic_ps_timer, jiffies +
1509 msecs_to_jiffies(
1510 local->hw.conf.dynamic_ps_timeout));
1511 return;
1512 }
1513
1514 /*
1515 * transmission can be stopped by others which leads to
1516 * dynamic_ps_timer expiry. Postpone the ps timer if it
1517 * is not the actual idle state.
1518 */
1519 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1520 for (q = 0; q < local->hw.queues; q++) {
1521 if (local->queue_stop_reasons[q]) {
1522 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1523 flags);
1524 mod_timer(&local->dynamic_ps_timer, jiffies +
1525 msecs_to_jiffies(
1526 local->hw.conf.dynamic_ps_timeout));
1527 return;
1528 }
1529 }
1530 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1531 }
1532
1533 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1534 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1535 if (drv_tx_frames_pending(local)) {
1536 mod_timer(&local->dynamic_ps_timer, jiffies +
1537 msecs_to_jiffies(
1538 local->hw.conf.dynamic_ps_timeout));
1539 } else {
1540 ieee80211_send_nullfunc(local, sdata, 1);
1541 /* Flush to get the tx status of nullfunc frame */
1542 ieee80211_flush_queues(local, sdata);
1543 }
1544 }
1545
1546 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1547 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1548 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1549 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1550 local->hw.conf.flags |= IEEE80211_CONF_PS;
1551 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1552 }
1553 }
1554
1555 void ieee80211_dynamic_ps_timer(unsigned long data)
1556 {
1557 struct ieee80211_local *local = (void *) data;
1558
1559 if (local->quiescing || local->suspended)
1560 return;
1561
1562 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1563 }
1564
1565 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1566 {
1567 struct delayed_work *delayed_work =
1568 container_of(work, struct delayed_work, work);
1569 struct ieee80211_sub_if_data *sdata =
1570 container_of(delayed_work, struct ieee80211_sub_if_data,
1571 dfs_cac_timer_work);
1572
1573 ieee80211_vif_release_channel(sdata);
1574
1575 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1576 }
1577
1578 /* MLME */
1579 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1580 struct ieee80211_sub_if_data *sdata,
1581 const u8 *wmm_param, size_t wmm_param_len)
1582 {
1583 struct ieee80211_tx_queue_params params;
1584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1585 size_t left;
1586 int count;
1587 const u8 *pos;
1588 u8 uapsd_queues = 0;
1589
1590 if (!local->ops->conf_tx)
1591 return false;
1592
1593 if (local->hw.queues < IEEE80211_NUM_ACS)
1594 return false;
1595
1596 if (!wmm_param)
1597 return false;
1598
1599 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1600 return false;
1601
1602 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1603 uapsd_queues = ifmgd->uapsd_queues;
1604
1605 count = wmm_param[6] & 0x0f;
1606 if (count == ifmgd->wmm_last_param_set)
1607 return false;
1608 ifmgd->wmm_last_param_set = count;
1609
1610 pos = wmm_param + 8;
1611 left = wmm_param_len - 8;
1612
1613 memset(&params, 0, sizeof(params));
1614
1615 sdata->wmm_acm = 0;
1616 for (; left >= 4; left -= 4, pos += 4) {
1617 int aci = (pos[0] >> 5) & 0x03;
1618 int acm = (pos[0] >> 4) & 0x01;
1619 bool uapsd = false;
1620 int queue;
1621
1622 switch (aci) {
1623 case 1: /* AC_BK */
1624 queue = 3;
1625 if (acm)
1626 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1627 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1628 uapsd = true;
1629 break;
1630 case 2: /* AC_VI */
1631 queue = 1;
1632 if (acm)
1633 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1634 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1635 uapsd = true;
1636 break;
1637 case 3: /* AC_VO */
1638 queue = 0;
1639 if (acm)
1640 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1641 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1642 uapsd = true;
1643 break;
1644 case 0: /* AC_BE */
1645 default:
1646 queue = 2;
1647 if (acm)
1648 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1649 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1650 uapsd = true;
1651 break;
1652 }
1653
1654 params.aifs = pos[0] & 0x0f;
1655 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1656 params.cw_min = ecw2cw(pos[1] & 0x0f);
1657 params.txop = get_unaligned_le16(pos + 2);
1658 params.acm = acm;
1659 params.uapsd = uapsd;
1660
1661 mlme_dbg(sdata,
1662 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1663 queue, aci, acm,
1664 params.aifs, params.cw_min, params.cw_max,
1665 params.txop, params.uapsd);
1666 sdata->tx_conf[queue] = params;
1667 if (drv_conf_tx(local, sdata, queue, &params))
1668 sdata_err(sdata,
1669 "failed to set TX queue parameters for queue %d\n",
1670 queue);
1671 }
1672
1673 /* enable WMM or activate new settings */
1674 sdata->vif.bss_conf.qos = true;
1675 return true;
1676 }
1677
1678 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1679 {
1680 lockdep_assert_held(&sdata->local->mtx);
1681
1682 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1683 IEEE80211_STA_BEACON_POLL);
1684 ieee80211_run_deferred_scan(sdata->local);
1685 }
1686
1687 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1688 {
1689 mutex_lock(&sdata->local->mtx);
1690 __ieee80211_stop_poll(sdata);
1691 mutex_unlock(&sdata->local->mtx);
1692 }
1693
1694 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1695 u16 capab, bool erp_valid, u8 erp)
1696 {
1697 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1698 u32 changed = 0;
1699 bool use_protection;
1700 bool use_short_preamble;
1701 bool use_short_slot;
1702
1703 if (erp_valid) {
1704 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1705 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1706 } else {
1707 use_protection = false;
1708 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1709 }
1710
1711 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1712 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1713 use_short_slot = true;
1714
1715 if (use_protection != bss_conf->use_cts_prot) {
1716 bss_conf->use_cts_prot = use_protection;
1717 changed |= BSS_CHANGED_ERP_CTS_PROT;
1718 }
1719
1720 if (use_short_preamble != bss_conf->use_short_preamble) {
1721 bss_conf->use_short_preamble = use_short_preamble;
1722 changed |= BSS_CHANGED_ERP_PREAMBLE;
1723 }
1724
1725 if (use_short_slot != bss_conf->use_short_slot) {
1726 bss_conf->use_short_slot = use_short_slot;
1727 changed |= BSS_CHANGED_ERP_SLOT;
1728 }
1729
1730 return changed;
1731 }
1732
1733 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1734 struct cfg80211_bss *cbss,
1735 u32 bss_info_changed)
1736 {
1737 struct ieee80211_bss *bss = (void *)cbss->priv;
1738 struct ieee80211_local *local = sdata->local;
1739 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1740
1741 bss_info_changed |= BSS_CHANGED_ASSOC;
1742 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1743 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1744
1745 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1746 beacon_loss_count * bss_conf->beacon_int));
1747
1748 sdata->u.mgd.associated = cbss;
1749 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1750
1751 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1752
1753 if (sdata->vif.p2p) {
1754 const struct cfg80211_bss_ies *ies;
1755
1756 rcu_read_lock();
1757 ies = rcu_dereference(cbss->ies);
1758 if (ies) {
1759 int ret;
1760
1761 ret = cfg80211_get_p2p_attr(
1762 ies->data, ies->len,
1763 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1764 (u8 *) &bss_conf->p2p_noa_attr,
1765 sizeof(bss_conf->p2p_noa_attr));
1766 if (ret >= 2) {
1767 sdata->u.mgd.p2p_noa_index =
1768 bss_conf->p2p_noa_attr.index;
1769 bss_info_changed |= BSS_CHANGED_P2P_PS;
1770 }
1771 }
1772 rcu_read_unlock();
1773 }
1774
1775 /* just to be sure */
1776 ieee80211_stop_poll(sdata);
1777
1778 ieee80211_led_assoc(local, 1);
1779
1780 if (sdata->u.mgd.have_beacon) {
1781 /*
1782 * If the AP is buggy we may get here with no DTIM period
1783 * known, so assume it's 1 which is the only safe assumption
1784 * in that case, although if the TIM IE is broken powersave
1785 * probably just won't work at all.
1786 */
1787 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1788 bss_conf->beacon_rate = bss->beacon_rate;
1789 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1790 } else {
1791 bss_conf->beacon_rate = NULL;
1792 bss_conf->dtim_period = 0;
1793 }
1794
1795 bss_conf->assoc = 1;
1796
1797 /* Tell the driver to monitor connection quality (if supported) */
1798 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1799 bss_conf->cqm_rssi_thold)
1800 bss_info_changed |= BSS_CHANGED_CQM;
1801
1802 /* Enable ARP filtering */
1803 if (bss_conf->arp_addr_cnt)
1804 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1805
1806 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1807
1808 mutex_lock(&local->iflist_mtx);
1809 ieee80211_recalc_ps(local, -1);
1810 mutex_unlock(&local->iflist_mtx);
1811
1812 ieee80211_recalc_smps(sdata);
1813 ieee80211_recalc_ps_vif(sdata);
1814
1815 netif_carrier_on(sdata->dev);
1816 }
1817
1818 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1819 u16 stype, u16 reason, bool tx,
1820 u8 *frame_buf)
1821 {
1822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1823 struct ieee80211_local *local = sdata->local;
1824 u32 changed = 0;
1825
1826 sdata_assert_lock(sdata);
1827
1828 if (WARN_ON_ONCE(tx && !frame_buf))
1829 return;
1830
1831 if (WARN_ON(!ifmgd->associated))
1832 return;
1833
1834 ieee80211_stop_poll(sdata);
1835
1836 ifmgd->associated = NULL;
1837 netif_carrier_off(sdata->dev);
1838
1839 /*
1840 * if we want to get out of ps before disassoc (why?) we have
1841 * to do it before sending disassoc, as otherwise the null-packet
1842 * won't be valid.
1843 */
1844 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1845 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1846 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1847 }
1848 local->ps_sdata = NULL;
1849
1850 /* disable per-vif ps */
1851 ieee80211_recalc_ps_vif(sdata);
1852
1853 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1854 if (tx)
1855 ieee80211_flush_queues(local, sdata);
1856
1857 /* deauthenticate/disassociate now */
1858 if (tx || frame_buf)
1859 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1860 reason, tx, frame_buf);
1861
1862 /* flush out frame */
1863 if (tx)
1864 ieee80211_flush_queues(local, sdata);
1865
1866 /* clear bssid only after building the needed mgmt frames */
1867 memset(ifmgd->bssid, 0, ETH_ALEN);
1868
1869 /* remove AP and TDLS peers */
1870 sta_info_flush_defer(sdata);
1871
1872 /* finally reset all BSS / config parameters */
1873 changed |= ieee80211_reset_erp_info(sdata);
1874
1875 ieee80211_led_assoc(local, 0);
1876 changed |= BSS_CHANGED_ASSOC;
1877 sdata->vif.bss_conf.assoc = false;
1878
1879 ifmgd->p2p_noa_index = -1;
1880 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1881 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1882
1883 /* on the next assoc, re-program HT/VHT parameters */
1884 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1885 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1886 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1887 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1888
1889 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1890
1891 del_timer_sync(&local->dynamic_ps_timer);
1892 cancel_work_sync(&local->dynamic_ps_enable_work);
1893
1894 /* Disable ARP filtering */
1895 if (sdata->vif.bss_conf.arp_addr_cnt)
1896 changed |= BSS_CHANGED_ARP_FILTER;
1897
1898 sdata->vif.bss_conf.qos = false;
1899 changed |= BSS_CHANGED_QOS;
1900
1901 /* The BSSID (not really interesting) and HT changed */
1902 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1903 ieee80211_bss_info_change_notify(sdata, changed);
1904
1905 /* disassociated - set to defaults now */
1906 ieee80211_set_wmm_default(sdata, false);
1907
1908 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1909 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1910 del_timer_sync(&sdata->u.mgd.timer);
1911 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1912
1913 sdata->vif.bss_conf.dtim_period = 0;
1914 sdata->vif.bss_conf.beacon_rate = NULL;
1915
1916 ifmgd->have_beacon = false;
1917
1918 ifmgd->flags = 0;
1919 ieee80211_vif_release_channel(sdata);
1920 }
1921
1922 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1923 struct ieee80211_hdr *hdr)
1924 {
1925 /*
1926 * We can postpone the mgd.timer whenever receiving unicast frames
1927 * from AP because we know that the connection is working both ways
1928 * at that time. But multicast frames (and hence also beacons) must
1929 * be ignored here, because we need to trigger the timer during
1930 * data idle periods for sending the periodic probe request to the
1931 * AP we're connected to.
1932 */
1933 if (is_multicast_ether_addr(hdr->addr1))
1934 return;
1935
1936 ieee80211_sta_reset_conn_monitor(sdata);
1937 }
1938
1939 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1940 {
1941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1942 struct ieee80211_local *local = sdata->local;
1943
1944 mutex_lock(&local->mtx);
1945 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1946 IEEE80211_STA_CONNECTION_POLL))) {
1947 mutex_unlock(&local->mtx);
1948 return;
1949 }
1950
1951 __ieee80211_stop_poll(sdata);
1952
1953 mutex_lock(&local->iflist_mtx);
1954 ieee80211_recalc_ps(local, -1);
1955 mutex_unlock(&local->iflist_mtx);
1956
1957 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1958 goto out;
1959
1960 /*
1961 * We've received a probe response, but are not sure whether
1962 * we have or will be receiving any beacons or data, so let's
1963 * schedule the timers again, just in case.
1964 */
1965 ieee80211_sta_reset_beacon_monitor(sdata);
1966
1967 mod_timer(&ifmgd->conn_mon_timer,
1968 round_jiffies_up(jiffies +
1969 IEEE80211_CONNECTION_IDLE_TIME));
1970 out:
1971 mutex_unlock(&local->mtx);
1972 }
1973
1974 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1975 struct ieee80211_hdr *hdr, bool ack)
1976 {
1977 if (!ieee80211_is_data(hdr->frame_control))
1978 return;
1979
1980 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1981 sdata->u.mgd.probe_send_count > 0) {
1982 if (ack)
1983 ieee80211_sta_reset_conn_monitor(sdata);
1984 else
1985 sdata->u.mgd.nullfunc_failed = true;
1986 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1987 return;
1988 }
1989
1990 if (ack)
1991 ieee80211_sta_reset_conn_monitor(sdata);
1992 }
1993
1994 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1995 {
1996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1997 const u8 *ssid;
1998 u8 *dst = ifmgd->associated->bssid;
1999 u8 unicast_limit = max(1, max_probe_tries - 3);
2000
2001 /*
2002 * Try sending broadcast probe requests for the last three
2003 * probe requests after the first ones failed since some
2004 * buggy APs only support broadcast probe requests.
2005 */
2006 if (ifmgd->probe_send_count >= unicast_limit)
2007 dst = NULL;
2008
2009 /*
2010 * When the hardware reports an accurate Tx ACK status, it's
2011 * better to send a nullfunc frame instead of a probe request,
2012 * as it will kick us off the AP quickly if we aren't associated
2013 * anymore. The timeout will be reset if the frame is ACKed by
2014 * the AP.
2015 */
2016 ifmgd->probe_send_count++;
2017
2018 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2019 ifmgd->nullfunc_failed = false;
2020 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2021 } else {
2022 int ssid_len;
2023
2024 rcu_read_lock();
2025 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2026 if (WARN_ON_ONCE(ssid == NULL))
2027 ssid_len = 0;
2028 else
2029 ssid_len = ssid[1];
2030
2031 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2032 0, (u32) -1, true, 0,
2033 ifmgd->associated->channel, false);
2034 rcu_read_unlock();
2035 }
2036
2037 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2038 run_again(sdata, ifmgd->probe_timeout);
2039 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2040 ieee80211_flush_queues(sdata->local, sdata);
2041 }
2042
2043 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2044 bool beacon)
2045 {
2046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2047 bool already = false;
2048
2049 if (!ieee80211_sdata_running(sdata))
2050 return;
2051
2052 sdata_lock(sdata);
2053
2054 if (!ifmgd->associated)
2055 goto out;
2056
2057 mutex_lock(&sdata->local->mtx);
2058
2059 if (sdata->local->tmp_channel || sdata->local->scanning) {
2060 mutex_unlock(&sdata->local->mtx);
2061 goto out;
2062 }
2063
2064 if (beacon) {
2065 mlme_dbg_ratelimited(sdata,
2066 "detected beacon loss from AP (missed %d beacons) - probing\n",
2067 beacon_loss_count);
2068
2069 ieee80211_cqm_rssi_notify(&sdata->vif,
2070 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2071 GFP_KERNEL);
2072 }
2073
2074 /*
2075 * The driver/our work has already reported this event or the
2076 * connection monitoring has kicked in and we have already sent
2077 * a probe request. Or maybe the AP died and the driver keeps
2078 * reporting until we disassociate...
2079 *
2080 * In either case we have to ignore the current call to this
2081 * function (except for setting the correct probe reason bit)
2082 * because otherwise we would reset the timer every time and
2083 * never check whether we received a probe response!
2084 */
2085 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2086 IEEE80211_STA_CONNECTION_POLL))
2087 already = true;
2088
2089 if (beacon)
2090 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2091 else
2092 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2093
2094 mutex_unlock(&sdata->local->mtx);
2095
2096 if (already)
2097 goto out;
2098
2099 mutex_lock(&sdata->local->iflist_mtx);
2100 ieee80211_recalc_ps(sdata->local, -1);
2101 mutex_unlock(&sdata->local->iflist_mtx);
2102
2103 ifmgd->probe_send_count = 0;
2104 ieee80211_mgd_probe_ap_send(sdata);
2105 out:
2106 sdata_unlock(sdata);
2107 }
2108
2109 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2110 struct ieee80211_vif *vif)
2111 {
2112 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2114 struct cfg80211_bss *cbss;
2115 struct sk_buff *skb;
2116 const u8 *ssid;
2117 int ssid_len;
2118
2119 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2120 return NULL;
2121
2122 sdata_assert_lock(sdata);
2123
2124 if (ifmgd->associated)
2125 cbss = ifmgd->associated;
2126 else if (ifmgd->auth_data)
2127 cbss = ifmgd->auth_data->bss;
2128 else if (ifmgd->assoc_data)
2129 cbss = ifmgd->assoc_data->bss;
2130 else
2131 return NULL;
2132
2133 rcu_read_lock();
2134 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2135 if (WARN_ON_ONCE(ssid == NULL))
2136 ssid_len = 0;
2137 else
2138 ssid_len = ssid[1];
2139
2140 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2141 (u32) -1, cbss->channel,
2142 ssid + 2, ssid_len,
2143 NULL, 0, true);
2144 rcu_read_unlock();
2145
2146 return skb;
2147 }
2148 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2149
2150 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2151 {
2152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2153 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2154
2155 sdata_lock(sdata);
2156 if (!ifmgd->associated) {
2157 sdata_unlock(sdata);
2158 return;
2159 }
2160
2161 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2162 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2163 true, frame_buf);
2164 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2165 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2166 IEEE80211_MAX_QUEUE_MAP,
2167 IEEE80211_QUEUE_STOP_REASON_CSA);
2168
2169 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2170 IEEE80211_DEAUTH_FRAME_LEN);
2171 sdata_unlock(sdata);
2172 }
2173
2174 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2175 {
2176 struct ieee80211_sub_if_data *sdata =
2177 container_of(work, struct ieee80211_sub_if_data,
2178 u.mgd.beacon_connection_loss_work);
2179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2180 struct sta_info *sta;
2181
2182 if (ifmgd->associated) {
2183 rcu_read_lock();
2184 sta = sta_info_get(sdata, ifmgd->bssid);
2185 if (sta)
2186 sta->beacon_loss_count++;
2187 rcu_read_unlock();
2188 }
2189
2190 if (ifmgd->connection_loss) {
2191 sdata_info(sdata, "Connection to AP %pM lost\n",
2192 ifmgd->bssid);
2193 __ieee80211_disconnect(sdata);
2194 } else {
2195 ieee80211_mgd_probe_ap(sdata, true);
2196 }
2197 }
2198
2199 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2200 {
2201 struct ieee80211_sub_if_data *sdata =
2202 container_of(work, struct ieee80211_sub_if_data,
2203 u.mgd.csa_connection_drop_work);
2204
2205 __ieee80211_disconnect(sdata);
2206 }
2207
2208 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2209 {
2210 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2211 struct ieee80211_hw *hw = &sdata->local->hw;
2212
2213 trace_api_beacon_loss(sdata);
2214
2215 sdata->u.mgd.connection_loss = false;
2216 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2217 }
2218 EXPORT_SYMBOL(ieee80211_beacon_loss);
2219
2220 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2221 {
2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2223 struct ieee80211_hw *hw = &sdata->local->hw;
2224
2225 trace_api_connection_loss(sdata);
2226
2227 sdata->u.mgd.connection_loss = true;
2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2229 }
2230 EXPORT_SYMBOL(ieee80211_connection_loss);
2231
2232
2233 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2234 bool assoc)
2235 {
2236 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2237
2238 sdata_assert_lock(sdata);
2239
2240 if (!assoc) {
2241 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2242
2243 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2244 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2245 sdata->u.mgd.flags = 0;
2246 ieee80211_vif_release_channel(sdata);
2247 }
2248
2249 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2250 kfree(auth_data);
2251 sdata->u.mgd.auth_data = NULL;
2252 }
2253
2254 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2255 struct ieee80211_mgmt *mgmt, size_t len)
2256 {
2257 struct ieee80211_local *local = sdata->local;
2258 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2259 u8 *pos;
2260 struct ieee802_11_elems elems;
2261 u32 tx_flags = 0;
2262
2263 pos = mgmt->u.auth.variable;
2264 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2265 if (!elems.challenge)
2266 return;
2267 auth_data->expected_transaction = 4;
2268 drv_mgd_prepare_tx(sdata->local, sdata);
2269 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2270 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2271 IEEE80211_TX_INTFL_MLME_CONN_TX;
2272 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2273 elems.challenge - 2, elems.challenge_len + 2,
2274 auth_data->bss->bssid, auth_data->bss->bssid,
2275 auth_data->key, auth_data->key_len,
2276 auth_data->key_idx, tx_flags);
2277 }
2278
2279 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2280 struct ieee80211_mgmt *mgmt, size_t len)
2281 {
2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2283 u8 bssid[ETH_ALEN];
2284 u16 auth_alg, auth_transaction, status_code;
2285 struct sta_info *sta;
2286
2287 sdata_assert_lock(sdata);
2288
2289 if (len < 24 + 6)
2290 return;
2291
2292 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2293 return;
2294
2295 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2296
2297 if (!ether_addr_equal(bssid, mgmt->bssid))
2298 return;
2299
2300 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2301 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2302 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2303
2304 if (auth_alg != ifmgd->auth_data->algorithm ||
2305 auth_transaction != ifmgd->auth_data->expected_transaction) {
2306 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2307 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2308 auth_transaction,
2309 ifmgd->auth_data->expected_transaction);
2310 return;
2311 }
2312
2313 if (status_code != WLAN_STATUS_SUCCESS) {
2314 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2315 mgmt->sa, status_code);
2316 ieee80211_destroy_auth_data(sdata, false);
2317 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2318 return;
2319 }
2320
2321 switch (ifmgd->auth_data->algorithm) {
2322 case WLAN_AUTH_OPEN:
2323 case WLAN_AUTH_LEAP:
2324 case WLAN_AUTH_FT:
2325 case WLAN_AUTH_SAE:
2326 break;
2327 case WLAN_AUTH_SHARED_KEY:
2328 if (ifmgd->auth_data->expected_transaction != 4) {
2329 ieee80211_auth_challenge(sdata, mgmt, len);
2330 /* need another frame */
2331 return;
2332 }
2333 break;
2334 default:
2335 WARN_ONCE(1, "invalid auth alg %d",
2336 ifmgd->auth_data->algorithm);
2337 return;
2338 }
2339
2340 sdata_info(sdata, "authenticated\n");
2341 ifmgd->auth_data->done = true;
2342 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2343 ifmgd->auth_data->timeout_started = true;
2344 run_again(sdata, ifmgd->auth_data->timeout);
2345
2346 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2347 ifmgd->auth_data->expected_transaction != 2) {
2348 /*
2349 * Report auth frame to user space for processing since another
2350 * round of Authentication frames is still needed.
2351 */
2352 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2353 return;
2354 }
2355
2356 /* move station state to auth */
2357 mutex_lock(&sdata->local->sta_mtx);
2358 sta = sta_info_get(sdata, bssid);
2359 if (!sta) {
2360 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2361 goto out_err;
2362 }
2363 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2364 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2365 goto out_err;
2366 }
2367 mutex_unlock(&sdata->local->sta_mtx);
2368
2369 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2370 return;
2371 out_err:
2372 mutex_unlock(&sdata->local->sta_mtx);
2373 /* ignore frame -- wait for timeout */
2374 }
2375
2376
2377 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2378 struct ieee80211_mgmt *mgmt, size_t len)
2379 {
2380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2381 const u8 *bssid = NULL;
2382 u16 reason_code;
2383
2384 sdata_assert_lock(sdata);
2385
2386 if (len < 24 + 2)
2387 return;
2388
2389 if (!ifmgd->associated ||
2390 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2391 return;
2392
2393 bssid = ifmgd->associated->bssid;
2394
2395 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2396
2397 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2398 bssid, reason_code);
2399
2400 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2401
2402 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2403 }
2404
2405
2406 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2407 struct ieee80211_mgmt *mgmt, size_t len)
2408 {
2409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2410 u16 reason_code;
2411
2412 sdata_assert_lock(sdata);
2413
2414 if (len < 24 + 2)
2415 return;
2416
2417 if (!ifmgd->associated ||
2418 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2419 return;
2420
2421 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2422
2423 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2424 mgmt->sa, reason_code);
2425
2426 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2427
2428 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2429 }
2430
2431 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2432 u8 *supp_rates, unsigned int supp_rates_len,
2433 u32 *rates, u32 *basic_rates,
2434 bool *have_higher_than_11mbit,
2435 int *min_rate, int *min_rate_index)
2436 {
2437 int i, j;
2438
2439 for (i = 0; i < supp_rates_len; i++) {
2440 int rate = (supp_rates[i] & 0x7f) * 5;
2441 bool is_basic = !!(supp_rates[i] & 0x80);
2442
2443 if (rate > 110)
2444 *have_higher_than_11mbit = true;
2445
2446 /*
2447 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2448 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2449 *
2450 * Note: Even through the membership selector and the basic
2451 * rate flag share the same bit, they are not exactly
2452 * the same.
2453 */
2454 if (!!(supp_rates[i] & 0x80) &&
2455 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2456 continue;
2457
2458 for (j = 0; j < sband->n_bitrates; j++) {
2459 if (sband->bitrates[j].bitrate == rate) {
2460 *rates |= BIT(j);
2461 if (is_basic)
2462 *basic_rates |= BIT(j);
2463 if (rate < *min_rate) {
2464 *min_rate = rate;
2465 *min_rate_index = j;
2466 }
2467 break;
2468 }
2469 }
2470 }
2471 }
2472
2473 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2474 bool assoc)
2475 {
2476 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2477
2478 sdata_assert_lock(sdata);
2479
2480 if (!assoc) {
2481 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2482
2483 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2484 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2485 sdata->u.mgd.flags = 0;
2486 ieee80211_vif_release_channel(sdata);
2487 }
2488
2489 kfree(assoc_data);
2490 sdata->u.mgd.assoc_data = NULL;
2491 }
2492
2493 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2494 struct cfg80211_bss *cbss,
2495 struct ieee80211_mgmt *mgmt, size_t len)
2496 {
2497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2498 struct ieee80211_local *local = sdata->local;
2499 struct ieee80211_supported_band *sband;
2500 struct sta_info *sta;
2501 u8 *pos;
2502 u16 capab_info, aid;
2503 struct ieee802_11_elems elems;
2504 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2505 const struct cfg80211_bss_ies *bss_ies = NULL;
2506 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2507 u32 changed = 0;
2508 int err;
2509 bool ret;
2510
2511 /* AssocResp and ReassocResp have identical structure */
2512
2513 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2514 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2515
2516 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2517 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2518 aid);
2519 aid &= ~(BIT(15) | BIT(14));
2520
2521 ifmgd->broken_ap = false;
2522
2523 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2524 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2525 aid);
2526 aid = 0;
2527 ifmgd->broken_ap = true;
2528 }
2529
2530 pos = mgmt->u.assoc_resp.variable;
2531 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2532
2533 if (!elems.supp_rates) {
2534 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2535 return false;
2536 }
2537
2538 ifmgd->aid = aid;
2539
2540 /*
2541 * Some APs are erroneously not including some information in their
2542 * (re)association response frames. Try to recover by using the data
2543 * from the beacon or probe response. This seems to afflict mobile
2544 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2545 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2546 */
2547 if ((assoc_data->wmm && !elems.wmm_param) ||
2548 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2549 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2550 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2551 (!elems.vht_cap_elem || !elems.vht_operation))) {
2552 const struct cfg80211_bss_ies *ies;
2553 struct ieee802_11_elems bss_elems;
2554
2555 rcu_read_lock();
2556 ies = rcu_dereference(cbss->ies);
2557 if (ies)
2558 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2559 GFP_ATOMIC);
2560 rcu_read_unlock();
2561 if (!bss_ies)
2562 return false;
2563
2564 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2565 false, &bss_elems);
2566 if (assoc_data->wmm &&
2567 !elems.wmm_param && bss_elems.wmm_param) {
2568 elems.wmm_param = bss_elems.wmm_param;
2569 sdata_info(sdata,
2570 "AP bug: WMM param missing from AssocResp\n");
2571 }
2572
2573 /*
2574 * Also check if we requested HT/VHT, otherwise the AP doesn't
2575 * have to include the IEs in the (re)association response.
2576 */
2577 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2578 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2579 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2580 sdata_info(sdata,
2581 "AP bug: HT capability missing from AssocResp\n");
2582 }
2583 if (!elems.ht_operation && bss_elems.ht_operation &&
2584 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2585 elems.ht_operation = bss_elems.ht_operation;
2586 sdata_info(sdata,
2587 "AP bug: HT operation missing from AssocResp\n");
2588 }
2589 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2590 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2591 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2592 sdata_info(sdata,
2593 "AP bug: VHT capa missing from AssocResp\n");
2594 }
2595 if (!elems.vht_operation && bss_elems.vht_operation &&
2596 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2597 elems.vht_operation = bss_elems.vht_operation;
2598 sdata_info(sdata,
2599 "AP bug: VHT operation missing from AssocResp\n");
2600 }
2601 }
2602
2603 /*
2604 * We previously checked these in the beacon/probe response, so
2605 * they should be present here. This is just a safety net.
2606 */
2607 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2608 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2609 sdata_info(sdata,
2610 "HT AP is missing WMM params or HT capability/operation\n");
2611 ret = false;
2612 goto out;
2613 }
2614
2615 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2616 (!elems.vht_cap_elem || !elems.vht_operation)) {
2617 sdata_info(sdata,
2618 "VHT AP is missing VHT capability/operation\n");
2619 ret = false;
2620 goto out;
2621 }
2622
2623 mutex_lock(&sdata->local->sta_mtx);
2624 /*
2625 * station info was already allocated and inserted before
2626 * the association and should be available to us
2627 */
2628 sta = sta_info_get(sdata, cbss->bssid);
2629 if (WARN_ON(!sta)) {
2630 mutex_unlock(&sdata->local->sta_mtx);
2631 ret = false;
2632 goto out;
2633 }
2634
2635 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2636
2637 /* Set up internal HT/VHT capabilities */
2638 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2639 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2640 elems.ht_cap_elem, sta);
2641
2642 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2643 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2644 elems.vht_cap_elem, sta);
2645
2646 /*
2647 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2648 * in their association response, so ignore that data for our own
2649 * configuration. If it changed since the last beacon, we'll get the
2650 * next beacon and update then.
2651 */
2652
2653 /*
2654 * If an operating mode notification IE is present, override the
2655 * NSS calculation (that would be done in rate_control_rate_init())
2656 * and use the # of streams from that element.
2657 */
2658 if (elems.opmode_notif &&
2659 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2660 u8 nss;
2661
2662 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2663 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2664 nss += 1;
2665 sta->sta.rx_nss = nss;
2666 }
2667
2668 rate_control_rate_init(sta);
2669
2670 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2671 set_sta_flag(sta, WLAN_STA_MFP);
2672
2673 if (elems.wmm_param)
2674 set_sta_flag(sta, WLAN_STA_WME);
2675
2676 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2677 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2678 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2679 if (err) {
2680 sdata_info(sdata,
2681 "failed to move station %pM to desired state\n",
2682 sta->sta.addr);
2683 WARN_ON(__sta_info_destroy(sta));
2684 mutex_unlock(&sdata->local->sta_mtx);
2685 ret = false;
2686 goto out;
2687 }
2688
2689 mutex_unlock(&sdata->local->sta_mtx);
2690
2691 /*
2692 * Always handle WMM once after association regardless
2693 * of the first value the AP uses. Setting -1 here has
2694 * that effect because the AP values is an unsigned
2695 * 4-bit value.
2696 */
2697 ifmgd->wmm_last_param_set = -1;
2698
2699 if (elems.wmm_param)
2700 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2701 elems.wmm_param_len);
2702 else
2703 ieee80211_set_wmm_default(sdata, false);
2704 changed |= BSS_CHANGED_QOS;
2705
2706 /* set AID and assoc capability,
2707 * ieee80211_set_associated() will tell the driver */
2708 bss_conf->aid = aid;
2709 bss_conf->assoc_capability = capab_info;
2710 ieee80211_set_associated(sdata, cbss, changed);
2711
2712 /*
2713 * If we're using 4-addr mode, let the AP know that we're
2714 * doing so, so that it can create the STA VLAN on its side
2715 */
2716 if (ifmgd->use_4addr)
2717 ieee80211_send_4addr_nullfunc(local, sdata);
2718
2719 /*
2720 * Start timer to probe the connection to the AP now.
2721 * Also start the timer that will detect beacon loss.
2722 */
2723 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2724 ieee80211_sta_reset_beacon_monitor(sdata);
2725
2726 ret = true;
2727 out:
2728 kfree(bss_ies);
2729 return ret;
2730 }
2731
2732 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2733 struct ieee80211_mgmt *mgmt,
2734 size_t len)
2735 {
2736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2737 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2738 u16 capab_info, status_code, aid;
2739 struct ieee802_11_elems elems;
2740 u8 *pos;
2741 bool reassoc;
2742 struct cfg80211_bss *bss;
2743
2744 sdata_assert_lock(sdata);
2745
2746 if (!assoc_data)
2747 return;
2748 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2749 return;
2750
2751 /*
2752 * AssocResp and ReassocResp have identical structure, so process both
2753 * of them in this function.
2754 */
2755
2756 if (len < 24 + 6)
2757 return;
2758
2759 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2760 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2761 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2762 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2763
2764 sdata_info(sdata,
2765 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2766 reassoc ? "Rea" : "A", mgmt->sa,
2767 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2768
2769 pos = mgmt->u.assoc_resp.variable;
2770 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2771
2772 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2773 elems.timeout_int &&
2774 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2775 u32 tu, ms;
2776 tu = le32_to_cpu(elems.timeout_int->value);
2777 ms = tu * 1024 / 1000;
2778 sdata_info(sdata,
2779 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2780 mgmt->sa, tu, ms);
2781 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2782 assoc_data->timeout_started = true;
2783 if (ms > IEEE80211_ASSOC_TIMEOUT)
2784 run_again(sdata, assoc_data->timeout);
2785 return;
2786 }
2787
2788 bss = assoc_data->bss;
2789
2790 if (status_code != WLAN_STATUS_SUCCESS) {
2791 sdata_info(sdata, "%pM denied association (code=%d)\n",
2792 mgmt->sa, status_code);
2793 ieee80211_destroy_assoc_data(sdata, false);
2794 } else {
2795 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2796 /* oops -- internal error -- send timeout for now */
2797 ieee80211_destroy_assoc_data(sdata, false);
2798 cfg80211_assoc_timeout(sdata->dev, bss);
2799 return;
2800 }
2801 sdata_info(sdata, "associated\n");
2802
2803 /*
2804 * destroy assoc_data afterwards, as otherwise an idle
2805 * recalc after assoc_data is NULL but before associated
2806 * is set can cause the interface to go idle
2807 */
2808 ieee80211_destroy_assoc_data(sdata, true);
2809 }
2810
2811 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2812 }
2813
2814 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2815 struct ieee80211_mgmt *mgmt, size_t len,
2816 struct ieee80211_rx_status *rx_status,
2817 struct ieee802_11_elems *elems)
2818 {
2819 struct ieee80211_local *local = sdata->local;
2820 int freq;
2821 struct ieee80211_bss *bss;
2822 struct ieee80211_channel *channel;
2823
2824 sdata_assert_lock(sdata);
2825
2826 if (elems->ds_params)
2827 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2828 rx_status->band);
2829 else
2830 freq = rx_status->freq;
2831
2832 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2833
2834 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2835 return;
2836
2837 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2838 channel);
2839 if (bss) {
2840 ieee80211_rx_bss_put(local, bss);
2841 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2842 }
2843
2844 if (!sdata->u.mgd.associated ||
2845 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2846 return;
2847
2848 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2849 elems, true);
2850
2851 }
2852
2853
2854 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2855 struct sk_buff *skb)
2856 {
2857 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2858 struct ieee80211_if_managed *ifmgd;
2859 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2860 size_t baselen, len = skb->len;
2861 struct ieee802_11_elems elems;
2862
2863 ifmgd = &sdata->u.mgd;
2864
2865 sdata_assert_lock(sdata);
2866
2867 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2868 return; /* ignore ProbeResp to foreign address */
2869
2870 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2871 if (baselen > len)
2872 return;
2873
2874 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2875 false, &elems);
2876
2877 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2878
2879 if (ifmgd->associated &&
2880 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2881 ieee80211_reset_ap_probe(sdata);
2882
2883 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2884 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2885 /* got probe response, continue with auth */
2886 sdata_info(sdata, "direct probe responded\n");
2887 ifmgd->auth_data->tries = 0;
2888 ifmgd->auth_data->timeout = jiffies;
2889 ifmgd->auth_data->timeout_started = true;
2890 run_again(sdata, ifmgd->auth_data->timeout);
2891 }
2892 }
2893
2894 /*
2895 * This is the canonical list of information elements we care about,
2896 * the filter code also gives us all changes to the Microsoft OUI
2897 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2898 *
2899 * We implement beacon filtering in software since that means we can
2900 * avoid processing the frame here and in cfg80211, and userspace
2901 * will not be able to tell whether the hardware supports it or not.
2902 *
2903 * XXX: This list needs to be dynamic -- userspace needs to be able to
2904 * add items it requires. It also needs to be able to tell us to
2905 * look out for other vendor IEs.
2906 */
2907 static const u64 care_about_ies =
2908 (1ULL << WLAN_EID_COUNTRY) |
2909 (1ULL << WLAN_EID_ERP_INFO) |
2910 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2911 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2912 (1ULL << WLAN_EID_HT_CAPABILITY) |
2913 (1ULL << WLAN_EID_HT_OPERATION);
2914
2915 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2916 struct ieee80211_mgmt *mgmt, size_t len,
2917 struct ieee80211_rx_status *rx_status)
2918 {
2919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2920 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2921 size_t baselen;
2922 struct ieee802_11_elems elems;
2923 struct ieee80211_local *local = sdata->local;
2924 struct ieee80211_chanctx_conf *chanctx_conf;
2925 struct ieee80211_channel *chan;
2926 struct sta_info *sta;
2927 u32 changed = 0;
2928 bool erp_valid;
2929 u8 erp_value = 0;
2930 u32 ncrc;
2931 u8 *bssid;
2932 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2933
2934 sdata_assert_lock(sdata);
2935
2936 /* Process beacon from the current BSS */
2937 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2938 if (baselen > len)
2939 return;
2940
2941 rcu_read_lock();
2942 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2943 if (!chanctx_conf) {
2944 rcu_read_unlock();
2945 return;
2946 }
2947
2948 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2949 rcu_read_unlock();
2950 return;
2951 }
2952 chan = chanctx_conf->def.chan;
2953 rcu_read_unlock();
2954
2955 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2956 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2957 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2958 len - baselen, false, &elems);
2959
2960 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2961 if (elems.tim && !elems.parse_error) {
2962 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2963 ifmgd->dtim_period = tim_ie->dtim_period;
2964 }
2965 ifmgd->have_beacon = true;
2966 ifmgd->assoc_data->need_beacon = false;
2967 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2968 sdata->vif.bss_conf.sync_tsf =
2969 le64_to_cpu(mgmt->u.beacon.timestamp);
2970 sdata->vif.bss_conf.sync_device_ts =
2971 rx_status->device_timestamp;
2972 if (elems.tim)
2973 sdata->vif.bss_conf.sync_dtim_count =
2974 elems.tim->dtim_count;
2975 else
2976 sdata->vif.bss_conf.sync_dtim_count = 0;
2977 }
2978 /* continue assoc process */
2979 ifmgd->assoc_data->timeout = jiffies;
2980 ifmgd->assoc_data->timeout_started = true;
2981 run_again(sdata, ifmgd->assoc_data->timeout);
2982 return;
2983 }
2984
2985 if (!ifmgd->associated ||
2986 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2987 return;
2988 bssid = ifmgd->associated->bssid;
2989
2990 /* Track average RSSI from the Beacon frames of the current AP */
2991 ifmgd->last_beacon_signal = rx_status->signal;
2992 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2993 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2994 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2995 ifmgd->last_cqm_event_signal = 0;
2996 ifmgd->count_beacon_signal = 1;
2997 ifmgd->last_ave_beacon_signal = 0;
2998 } else {
2999 ifmgd->ave_beacon_signal =
3000 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3001 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3002 ifmgd->ave_beacon_signal) / 16;
3003 ifmgd->count_beacon_signal++;
3004 }
3005
3006 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3007 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3008 int sig = ifmgd->ave_beacon_signal;
3009 int last_sig = ifmgd->last_ave_beacon_signal;
3010
3011 /*
3012 * if signal crosses either of the boundaries, invoke callback
3013 * with appropriate parameters
3014 */
3015 if (sig > ifmgd->rssi_max_thold &&
3016 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3017 ifmgd->last_ave_beacon_signal = sig;
3018 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3019 } else if (sig < ifmgd->rssi_min_thold &&
3020 (last_sig >= ifmgd->rssi_max_thold ||
3021 last_sig == 0)) {
3022 ifmgd->last_ave_beacon_signal = sig;
3023 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3024 }
3025 }
3026
3027 if (bss_conf->cqm_rssi_thold &&
3028 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3029 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3030 int sig = ifmgd->ave_beacon_signal / 16;
3031 int last_event = ifmgd->last_cqm_event_signal;
3032 int thold = bss_conf->cqm_rssi_thold;
3033 int hyst = bss_conf->cqm_rssi_hyst;
3034 if (sig < thold &&
3035 (last_event == 0 || sig < last_event - hyst)) {
3036 ifmgd->last_cqm_event_signal = sig;
3037 ieee80211_cqm_rssi_notify(
3038 &sdata->vif,
3039 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3040 GFP_KERNEL);
3041 } else if (sig > thold &&
3042 (last_event == 0 || sig > last_event + hyst)) {
3043 ifmgd->last_cqm_event_signal = sig;
3044 ieee80211_cqm_rssi_notify(
3045 &sdata->vif,
3046 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3047 GFP_KERNEL);
3048 }
3049 }
3050
3051 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3052 mlme_dbg_ratelimited(sdata,
3053 "cancelling AP probe due to a received beacon\n");
3054 mutex_lock(&local->mtx);
3055 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3056 ieee80211_run_deferred_scan(local);
3057 mutex_unlock(&local->mtx);
3058
3059 mutex_lock(&local->iflist_mtx);
3060 ieee80211_recalc_ps(local, -1);
3061 mutex_unlock(&local->iflist_mtx);
3062 }
3063
3064 /*
3065 * Push the beacon loss detection into the future since
3066 * we are processing a beacon from the AP just now.
3067 */
3068 ieee80211_sta_reset_beacon_monitor(sdata);
3069
3070 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3071 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3072 len - baselen, false, &elems,
3073 care_about_ies, ncrc);
3074
3075 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3076 bool directed_tim = ieee80211_check_tim(elems.tim,
3077 elems.tim_len,
3078 ifmgd->aid);
3079 if (directed_tim) {
3080 if (local->hw.conf.dynamic_ps_timeout > 0) {
3081 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3082 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3083 ieee80211_hw_config(local,
3084 IEEE80211_CONF_CHANGE_PS);
3085 }
3086 ieee80211_send_nullfunc(local, sdata, 0);
3087 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3088 local->pspolling = true;
3089
3090 /*
3091 * Here is assumed that the driver will be
3092 * able to send ps-poll frame and receive a
3093 * response even though power save mode is
3094 * enabled, but some drivers might require
3095 * to disable power save here. This needs
3096 * to be investigated.
3097 */
3098 ieee80211_send_pspoll(local, sdata);
3099 }
3100 }
3101 }
3102
3103 if (sdata->vif.p2p) {
3104 struct ieee80211_p2p_noa_attr noa = {};
3105 int ret;
3106
3107 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3108 len - baselen,
3109 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3110 (u8 *) &noa, sizeof(noa));
3111 if (ret >= 2) {
3112 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3113 /* valid noa_attr and index changed */
3114 sdata->u.mgd.p2p_noa_index = noa.index;
3115 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3116 changed |= BSS_CHANGED_P2P_PS;
3117 /*
3118 * make sure we update all information, the CRC
3119 * mechanism doesn't look at P2P attributes.
3120 */
3121 ifmgd->beacon_crc_valid = false;
3122 }
3123 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3124 /* noa_attr not found and we had valid noa_attr before */
3125 sdata->u.mgd.p2p_noa_index = -1;
3126 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3127 changed |= BSS_CHANGED_P2P_PS;
3128 ifmgd->beacon_crc_valid = false;
3129 }
3130 }
3131
3132 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3133 return;
3134 ifmgd->beacon_crc = ncrc;
3135 ifmgd->beacon_crc_valid = true;
3136
3137 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3138
3139 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3140 elems.wmm_param_len))
3141 changed |= BSS_CHANGED_QOS;
3142
3143 /*
3144 * If we haven't had a beacon before, tell the driver about the
3145 * DTIM period (and beacon timing if desired) now.
3146 */
3147 if (!ifmgd->have_beacon) {
3148 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3149 if (elems.tim)
3150 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3151 else
3152 bss_conf->dtim_period = 1;
3153
3154 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3155 sdata->vif.bss_conf.sync_tsf =
3156 le64_to_cpu(mgmt->u.beacon.timestamp);
3157 sdata->vif.bss_conf.sync_device_ts =
3158 rx_status->device_timestamp;
3159 if (elems.tim)
3160 sdata->vif.bss_conf.sync_dtim_count =
3161 elems.tim->dtim_count;
3162 else
3163 sdata->vif.bss_conf.sync_dtim_count = 0;
3164 }
3165
3166 changed |= BSS_CHANGED_BEACON_INFO;
3167 ifmgd->have_beacon = true;
3168
3169 mutex_lock(&local->iflist_mtx);
3170 ieee80211_recalc_ps(local, -1);
3171 mutex_unlock(&local->iflist_mtx);
3172
3173 ieee80211_recalc_ps_vif(sdata);
3174 }
3175
3176 if (elems.erp_info) {
3177 erp_valid = true;
3178 erp_value = elems.erp_info[0];
3179 } else {
3180 erp_valid = false;
3181 }
3182 changed |= ieee80211_handle_bss_capability(sdata,
3183 le16_to_cpu(mgmt->u.beacon.capab_info),
3184 erp_valid, erp_value);
3185
3186 mutex_lock(&local->sta_mtx);
3187 sta = sta_info_get(sdata, bssid);
3188
3189 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3190 elems.vht_operation, bssid, &changed)) {
3191 mutex_unlock(&local->sta_mtx);
3192 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3193 WLAN_REASON_DEAUTH_LEAVING,
3194 true, deauth_buf);
3195 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3196 sizeof(deauth_buf));
3197 return;
3198 }
3199
3200 if (sta && elems.opmode_notif)
3201 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3202 rx_status->band, true);
3203 mutex_unlock(&local->sta_mtx);
3204
3205 if (elems.country_elem && elems.pwr_constr_elem &&
3206 mgmt->u.probe_resp.capab_info &
3207 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3208 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3209 elems.country_elem,
3210 elems.country_elem_len,
3211 elems.pwr_constr_elem);
3212
3213 ieee80211_bss_info_change_notify(sdata, changed);
3214 }
3215
3216 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3217 struct sk_buff *skb)
3218 {
3219 struct ieee80211_rx_status *rx_status;
3220 struct ieee80211_mgmt *mgmt;
3221 u16 fc;
3222 struct ieee802_11_elems elems;
3223 int ies_len;
3224
3225 rx_status = (struct ieee80211_rx_status *) skb->cb;
3226 mgmt = (struct ieee80211_mgmt *) skb->data;
3227 fc = le16_to_cpu(mgmt->frame_control);
3228
3229 sdata_lock(sdata);
3230
3231 switch (fc & IEEE80211_FCTL_STYPE) {
3232 case IEEE80211_STYPE_BEACON:
3233 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3234 break;
3235 case IEEE80211_STYPE_PROBE_RESP:
3236 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3237 break;
3238 case IEEE80211_STYPE_AUTH:
3239 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3240 break;
3241 case IEEE80211_STYPE_DEAUTH:
3242 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3243 break;
3244 case IEEE80211_STYPE_DISASSOC:
3245 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3246 break;
3247 case IEEE80211_STYPE_ASSOC_RESP:
3248 case IEEE80211_STYPE_REASSOC_RESP:
3249 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3250 break;
3251 case IEEE80211_STYPE_ACTION:
3252 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3253 ies_len = skb->len -
3254 offsetof(struct ieee80211_mgmt,
3255 u.action.u.chan_switch.variable);
3256
3257 if (ies_len < 0)
3258 break;
3259
3260 ieee802_11_parse_elems(
3261 mgmt->u.action.u.chan_switch.variable,
3262 ies_len, true, &elems);
3263
3264 if (elems.parse_error)
3265 break;
3266
3267 ieee80211_sta_process_chanswitch(sdata,
3268 rx_status->mactime,
3269 &elems, false);
3270 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3271 ies_len = skb->len -
3272 offsetof(struct ieee80211_mgmt,
3273 u.action.u.ext_chan_switch.variable);
3274
3275 if (ies_len < 0)
3276 break;
3277
3278 ieee802_11_parse_elems(
3279 mgmt->u.action.u.ext_chan_switch.variable,
3280 ies_len, true, &elems);
3281
3282 if (elems.parse_error)
3283 break;
3284
3285 /* for the handling code pretend this was also an IE */
3286 elems.ext_chansw_ie =
3287 &mgmt->u.action.u.ext_chan_switch.data;
3288
3289 ieee80211_sta_process_chanswitch(sdata,
3290 rx_status->mactime,
3291 &elems, false);
3292 }
3293 break;
3294 }
3295 sdata_unlock(sdata);
3296 }
3297
3298 static void ieee80211_sta_timer(unsigned long data)
3299 {
3300 struct ieee80211_sub_if_data *sdata =
3301 (struct ieee80211_sub_if_data *) data;
3302
3303 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3304 }
3305
3306 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3307 u8 *bssid, u8 reason, bool tx)
3308 {
3309 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3310
3311 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3312 tx, frame_buf);
3313
3314 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3315 IEEE80211_DEAUTH_FRAME_LEN);
3316 }
3317
3318 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3319 {
3320 struct ieee80211_local *local = sdata->local;
3321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3322 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3323 u32 tx_flags = 0;
3324
3325 sdata_assert_lock(sdata);
3326
3327 if (WARN_ON_ONCE(!auth_data))
3328 return -EINVAL;
3329
3330 auth_data->tries++;
3331
3332 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3333 sdata_info(sdata, "authentication with %pM timed out\n",
3334 auth_data->bss->bssid);
3335
3336 /*
3337 * Most likely AP is not in the range so remove the
3338 * bss struct for that AP.
3339 */
3340 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3341
3342 return -ETIMEDOUT;
3343 }
3344
3345 drv_mgd_prepare_tx(local, sdata);
3346
3347 if (auth_data->bss->proberesp_ies) {
3348 u16 trans = 1;
3349 u16 status = 0;
3350
3351 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3352 auth_data->bss->bssid, auth_data->tries,
3353 IEEE80211_AUTH_MAX_TRIES);
3354
3355 auth_data->expected_transaction = 2;
3356
3357 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3358 trans = auth_data->sae_trans;
3359 status = auth_data->sae_status;
3360 auth_data->expected_transaction = trans;
3361 }
3362
3363 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3364 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3365 IEEE80211_TX_INTFL_MLME_CONN_TX;
3366
3367 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3368 auth_data->data, auth_data->data_len,
3369 auth_data->bss->bssid,
3370 auth_data->bss->bssid, NULL, 0, 0,
3371 tx_flags);
3372 } else {
3373 const u8 *ssidie;
3374
3375 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3376 auth_data->bss->bssid, auth_data->tries,
3377 IEEE80211_AUTH_MAX_TRIES);
3378
3379 rcu_read_lock();
3380 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3381 if (!ssidie) {
3382 rcu_read_unlock();
3383 return -EINVAL;
3384 }
3385 /*
3386 * Direct probe is sent to broadcast address as some APs
3387 * will not answer to direct packet in unassociated state.
3388 */
3389 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3390 NULL, 0, (u32) -1, true, 0,
3391 auth_data->bss->channel, false);
3392 rcu_read_unlock();
3393 }
3394
3395 if (tx_flags == 0) {
3396 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3397 ifmgd->auth_data->timeout_started = true;
3398 run_again(sdata, auth_data->timeout);
3399 } else {
3400 auth_data->timeout_started = false;
3401 }
3402
3403 return 0;
3404 }
3405
3406 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3407 {
3408 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3409 struct ieee80211_local *local = sdata->local;
3410
3411 sdata_assert_lock(sdata);
3412
3413 assoc_data->tries++;
3414 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3415 sdata_info(sdata, "association with %pM timed out\n",
3416 assoc_data->bss->bssid);
3417
3418 /*
3419 * Most likely AP is not in the range so remove the
3420 * bss struct for that AP.
3421 */
3422 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3423
3424 return -ETIMEDOUT;
3425 }
3426
3427 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3428 assoc_data->bss->bssid, assoc_data->tries,
3429 IEEE80211_ASSOC_MAX_TRIES);
3430 ieee80211_send_assoc(sdata);
3431
3432 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3433 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3434 assoc_data->timeout_started = true;
3435 run_again(sdata, assoc_data->timeout);
3436 } else {
3437 assoc_data->timeout_started = false;
3438 }
3439
3440 return 0;
3441 }
3442
3443 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3444 __le16 fc, bool acked)
3445 {
3446 struct ieee80211_local *local = sdata->local;
3447
3448 sdata->u.mgd.status_fc = fc;
3449 sdata->u.mgd.status_acked = acked;
3450 sdata->u.mgd.status_received = true;
3451
3452 ieee80211_queue_work(&local->hw, &sdata->work);
3453 }
3454
3455 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3456 {
3457 struct ieee80211_local *local = sdata->local;
3458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3459
3460 sdata_lock(sdata);
3461
3462 if (ifmgd->status_received) {
3463 __le16 fc = ifmgd->status_fc;
3464 bool status_acked = ifmgd->status_acked;
3465
3466 ifmgd->status_received = false;
3467 if (ifmgd->auth_data &&
3468 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3469 if (status_acked) {
3470 ifmgd->auth_data->timeout =
3471 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3472 run_again(sdata, ifmgd->auth_data->timeout);
3473 } else {
3474 ifmgd->auth_data->timeout = jiffies - 1;
3475 }
3476 ifmgd->auth_data->timeout_started = true;
3477 } else if (ifmgd->assoc_data &&
3478 (ieee80211_is_assoc_req(fc) ||
3479 ieee80211_is_reassoc_req(fc))) {
3480 if (status_acked) {
3481 ifmgd->assoc_data->timeout =
3482 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3483 run_again(sdata, ifmgd->assoc_data->timeout);
3484 } else {
3485 ifmgd->assoc_data->timeout = jiffies - 1;
3486 }
3487 ifmgd->assoc_data->timeout_started = true;
3488 }
3489 }
3490
3491 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3492 time_after(jiffies, ifmgd->auth_data->timeout)) {
3493 if (ifmgd->auth_data->done) {
3494 /*
3495 * ok ... we waited for assoc but userspace didn't,
3496 * so let's just kill the auth data
3497 */
3498 ieee80211_destroy_auth_data(sdata, false);
3499 } else if (ieee80211_probe_auth(sdata)) {
3500 u8 bssid[ETH_ALEN];
3501
3502 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3503
3504 ieee80211_destroy_auth_data(sdata, false);
3505
3506 cfg80211_auth_timeout(sdata->dev, bssid);
3507 }
3508 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3509 run_again(sdata, ifmgd->auth_data->timeout);
3510
3511 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3512 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3513 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3514 ieee80211_do_assoc(sdata)) {
3515 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3516
3517 ieee80211_destroy_assoc_data(sdata, false);
3518 cfg80211_assoc_timeout(sdata->dev, bss);
3519 }
3520 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3521 run_again(sdata, ifmgd->assoc_data->timeout);
3522
3523 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3524 IEEE80211_STA_CONNECTION_POLL) &&
3525 ifmgd->associated) {
3526 u8 bssid[ETH_ALEN];
3527 int max_tries;
3528
3529 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3530
3531 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3532 max_tries = max_nullfunc_tries;
3533 else
3534 max_tries = max_probe_tries;
3535
3536 /* ACK received for nullfunc probing frame */
3537 if (!ifmgd->probe_send_count)
3538 ieee80211_reset_ap_probe(sdata);
3539 else if (ifmgd->nullfunc_failed) {
3540 if (ifmgd->probe_send_count < max_tries) {
3541 mlme_dbg(sdata,
3542 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3543 bssid, ifmgd->probe_send_count,
3544 max_tries);
3545 ieee80211_mgd_probe_ap_send(sdata);
3546 } else {
3547 mlme_dbg(sdata,
3548 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3549 bssid);
3550 ieee80211_sta_connection_lost(sdata, bssid,
3551 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3552 false);
3553 }
3554 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3555 run_again(sdata, ifmgd->probe_timeout);
3556 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3557 mlme_dbg(sdata,
3558 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3559 bssid, probe_wait_ms);
3560 ieee80211_sta_connection_lost(sdata, bssid,
3561 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3562 } else if (ifmgd->probe_send_count < max_tries) {
3563 mlme_dbg(sdata,
3564 "No probe response from AP %pM after %dms, try %d/%i\n",
3565 bssid, probe_wait_ms,
3566 ifmgd->probe_send_count, max_tries);
3567 ieee80211_mgd_probe_ap_send(sdata);
3568 } else {
3569 /*
3570 * We actually lost the connection ... or did we?
3571 * Let's make sure!
3572 */
3573 wiphy_debug(local->hw.wiphy,
3574 "%s: No probe response from AP %pM"
3575 " after %dms, disconnecting.\n",
3576 sdata->name,
3577 bssid, probe_wait_ms);
3578
3579 ieee80211_sta_connection_lost(sdata, bssid,
3580 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581 }
3582 }
3583
3584 sdata_unlock(sdata);
3585 }
3586
3587 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3588 {
3589 struct ieee80211_sub_if_data *sdata =
3590 (struct ieee80211_sub_if_data *) data;
3591 struct ieee80211_local *local = sdata->local;
3592
3593 if (local->quiescing)
3594 return;
3595
3596 sdata->u.mgd.connection_loss = false;
3597 ieee80211_queue_work(&sdata->local->hw,
3598 &sdata->u.mgd.beacon_connection_loss_work);
3599 }
3600
3601 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3602 {
3603 struct ieee80211_sub_if_data *sdata =
3604 (struct ieee80211_sub_if_data *) data;
3605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3606 struct ieee80211_local *local = sdata->local;
3607
3608 if (local->quiescing)
3609 return;
3610
3611 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3612 }
3613
3614 static void ieee80211_sta_monitor_work(struct work_struct *work)
3615 {
3616 struct ieee80211_sub_if_data *sdata =
3617 container_of(work, struct ieee80211_sub_if_data,
3618 u.mgd.monitor_work);
3619
3620 ieee80211_mgd_probe_ap(sdata, false);
3621 }
3622
3623 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3624 {
3625 u32 flags;
3626
3627 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3628 __ieee80211_stop_poll(sdata);
3629
3630 /* let's probe the connection once */
3631 flags = sdata->local->hw.flags;
3632 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3633 ieee80211_queue_work(&sdata->local->hw,
3634 &sdata->u.mgd.monitor_work);
3635 /* and do all the other regular work too */
3636 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3637 }
3638 }
3639
3640 #ifdef CONFIG_PM
3641 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3642 {
3643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3644
3645 sdata_lock(sdata);
3646 if (!ifmgd->associated) {
3647 sdata_unlock(sdata);
3648 return;
3649 }
3650
3651 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3652 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3653 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3654 ieee80211_sta_connection_lost(sdata,
3655 ifmgd->associated->bssid,
3656 WLAN_REASON_UNSPECIFIED,
3657 true);
3658 sdata_unlock(sdata);
3659 return;
3660 }
3661 sdata_unlock(sdata);
3662 }
3663 #endif
3664
3665 /* interface setup */
3666 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3667 {
3668 struct ieee80211_if_managed *ifmgd;
3669
3670 ifmgd = &sdata->u.mgd;
3671 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3672 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3673 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3674 ieee80211_beacon_connection_loss_work);
3675 INIT_WORK(&ifmgd->csa_connection_drop_work,
3676 ieee80211_csa_connection_drop_work);
3677 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3678 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3679 (unsigned long) sdata);
3680 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3681 (unsigned long) sdata);
3682 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3683 (unsigned long) sdata);
3684 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3685 (unsigned long) sdata);
3686
3687 ifmgd->flags = 0;
3688 ifmgd->powersave = sdata->wdev.ps;
3689 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3690 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3691 ifmgd->p2p_noa_index = -1;
3692
3693 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3694 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3695 else
3696 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3697 }
3698
3699 /* scan finished notification */
3700 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3701 {
3702 struct ieee80211_sub_if_data *sdata;
3703
3704 /* Restart STA timers */
3705 rcu_read_lock();
3706 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3707 if (ieee80211_sdata_running(sdata))
3708 ieee80211_restart_sta_timer(sdata);
3709 }
3710 rcu_read_unlock();
3711 }
3712
3713 int ieee80211_max_network_latency(struct notifier_block *nb,
3714 unsigned long data, void *dummy)
3715 {
3716 s32 latency_usec = (s32) data;
3717 struct ieee80211_local *local =
3718 container_of(nb, struct ieee80211_local,
3719 network_latency_notifier);
3720
3721 mutex_lock(&local->iflist_mtx);
3722 ieee80211_recalc_ps(local, latency_usec);
3723 mutex_unlock(&local->iflist_mtx);
3724
3725 return 0;
3726 }
3727
3728 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3729 struct cfg80211_bss *cbss)
3730 {
3731 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3732 const u8 *ht_cap_ie, *vht_cap_ie;
3733 const struct ieee80211_ht_cap *ht_cap;
3734 const struct ieee80211_vht_cap *vht_cap;
3735 u8 chains = 1;
3736
3737 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3738 return chains;
3739
3740 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3741 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3742 ht_cap = (void *)(ht_cap_ie + 2);
3743 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3744 /*
3745 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3746 * "Tx Unequal Modulation Supported" fields.
3747 */
3748 }
3749
3750 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3751 return chains;
3752
3753 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3754 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3755 u8 nss;
3756 u16 tx_mcs_map;
3757
3758 vht_cap = (void *)(vht_cap_ie + 2);
3759 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3760 for (nss = 8; nss > 0; nss--) {
3761 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3762 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3763 break;
3764 }
3765 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3766 chains = max(chains, nss);
3767 }
3768
3769 return chains;
3770 }
3771
3772 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3773 struct cfg80211_bss *cbss)
3774 {
3775 struct ieee80211_local *local = sdata->local;
3776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3777 const struct ieee80211_ht_operation *ht_oper = NULL;
3778 const struct ieee80211_vht_operation *vht_oper = NULL;
3779 struct ieee80211_supported_band *sband;
3780 struct cfg80211_chan_def chandef;
3781 int ret;
3782
3783 sband = local->hw.wiphy->bands[cbss->channel->band];
3784
3785 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3786 IEEE80211_STA_DISABLE_80P80MHZ |
3787 IEEE80211_STA_DISABLE_160MHZ);
3788
3789 rcu_read_lock();
3790
3791 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3792 sband->ht_cap.ht_supported) {
3793 const u8 *ht_oper_ie, *ht_cap;
3794
3795 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3796 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3797 ht_oper = (void *)(ht_oper_ie + 2);
3798
3799 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3800 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3801 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3802 ht_oper = NULL;
3803 }
3804 }
3805
3806 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3807 sband->vht_cap.vht_supported) {
3808 const u8 *vht_oper_ie, *vht_cap;
3809
3810 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3811 WLAN_EID_VHT_OPERATION);
3812 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3813 vht_oper = (void *)(vht_oper_ie + 2);
3814 if (vht_oper && !ht_oper) {
3815 vht_oper = NULL;
3816 sdata_info(sdata,
3817 "AP advertised VHT without HT, disabling both\n");
3818 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3819 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3820 }
3821
3822 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3823 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3824 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3825 vht_oper = NULL;
3826 }
3827 }
3828
3829 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3830 cbss->channel,
3831 ht_oper, vht_oper,
3832 &chandef, true);
3833
3834 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3835 local->rx_chains);
3836
3837 rcu_read_unlock();
3838
3839 /* will change later if needed */
3840 sdata->smps_mode = IEEE80211_SMPS_OFF;
3841
3842 /*
3843 * If this fails (possibly due to channel context sharing
3844 * on incompatible channels, e.g. 80+80 and 160 sharing the
3845 * same control channel) try to use a smaller bandwidth.
3846 */
3847 ret = ieee80211_vif_use_channel(sdata, &chandef,
3848 IEEE80211_CHANCTX_SHARED);
3849
3850 /* don't downgrade for 5 and 10 MHz channels, though. */
3851 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3852 chandef.width == NL80211_CHAN_WIDTH_10)
3853 return ret;
3854
3855 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3856 ifmgd->flags |= chandef_downgrade(&chandef);
3857 ret = ieee80211_vif_use_channel(sdata, &chandef,
3858 IEEE80211_CHANCTX_SHARED);
3859 }
3860 return ret;
3861 }
3862
3863 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3864 struct cfg80211_bss *cbss, bool assoc)
3865 {
3866 struct ieee80211_local *local = sdata->local;
3867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3868 struct ieee80211_bss *bss = (void *)cbss->priv;
3869 struct sta_info *new_sta = NULL;
3870 bool have_sta = false;
3871 int err;
3872
3873 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3874 return -EINVAL;
3875
3876 if (assoc) {
3877 rcu_read_lock();
3878 have_sta = sta_info_get(sdata, cbss->bssid);
3879 rcu_read_unlock();
3880 }
3881
3882 if (!have_sta) {
3883 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3884 if (!new_sta)
3885 return -ENOMEM;
3886 }
3887
3888 if (new_sta) {
3889 u32 rates = 0, basic_rates = 0;
3890 bool have_higher_than_11mbit;
3891 int min_rate = INT_MAX, min_rate_index = -1;
3892 struct ieee80211_supported_band *sband;
3893 const struct cfg80211_bss_ies *ies;
3894
3895 sband = local->hw.wiphy->bands[cbss->channel->band];
3896
3897 err = ieee80211_prep_channel(sdata, cbss);
3898 if (err) {
3899 sta_info_free(local, new_sta);
3900 return err;
3901 }
3902
3903 ieee80211_get_rates(sband, bss->supp_rates,
3904 bss->supp_rates_len,
3905 &rates, &basic_rates,
3906 &have_higher_than_11mbit,
3907 &min_rate, &min_rate_index);
3908
3909 /*
3910 * This used to be a workaround for basic rates missing
3911 * in the association response frame. Now that we no
3912 * longer use the basic rates from there, it probably
3913 * doesn't happen any more, but keep the workaround so
3914 * in case some *other* APs are buggy in different ways
3915 * we can connect -- with a warning.
3916 */
3917 if (!basic_rates && min_rate_index >= 0) {
3918 sdata_info(sdata,
3919 "No basic rates, using min rate instead\n");
3920 basic_rates = BIT(min_rate_index);
3921 }
3922
3923 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3924 sdata->vif.bss_conf.basic_rates = basic_rates;
3925
3926 /* cf. IEEE 802.11 9.2.12 */
3927 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3928 have_higher_than_11mbit)
3929 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3930 else
3931 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3932
3933 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3934
3935 /* set timing information */
3936 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3937 rcu_read_lock();
3938 ies = rcu_dereference(cbss->beacon_ies);
3939 if (ies) {
3940 const u8 *tim_ie;
3941
3942 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3943 sdata->vif.bss_conf.sync_device_ts =
3944 bss->device_ts_beacon;
3945 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3946 ies->data, ies->len);
3947 if (tim_ie && tim_ie[1] >= 2)
3948 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3949 else
3950 sdata->vif.bss_conf.sync_dtim_count = 0;
3951 } else if (!(local->hw.flags &
3952 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3953 ies = rcu_dereference(cbss->proberesp_ies);
3954 /* must be non-NULL since beacon IEs were NULL */
3955 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3956 sdata->vif.bss_conf.sync_device_ts =
3957 bss->device_ts_presp;
3958 sdata->vif.bss_conf.sync_dtim_count = 0;
3959 } else {
3960 sdata->vif.bss_conf.sync_tsf = 0;
3961 sdata->vif.bss_conf.sync_device_ts = 0;
3962 sdata->vif.bss_conf.sync_dtim_count = 0;
3963 }
3964 rcu_read_unlock();
3965
3966 /* tell driver about BSSID, basic rates and timing */
3967 ieee80211_bss_info_change_notify(sdata,
3968 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3969 BSS_CHANGED_BEACON_INT);
3970
3971 if (assoc)
3972 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3973
3974 err = sta_info_insert(new_sta);
3975 new_sta = NULL;
3976 if (err) {
3977 sdata_info(sdata,
3978 "failed to insert STA entry for the AP (error %d)\n",
3979 err);
3980 return err;
3981 }
3982 } else
3983 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3984
3985 return 0;
3986 }
3987
3988 /* config hooks */
3989 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3990 struct cfg80211_auth_request *req)
3991 {
3992 struct ieee80211_local *local = sdata->local;
3993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3994 struct ieee80211_mgd_auth_data *auth_data;
3995 u16 auth_alg;
3996 int err;
3997
3998 /* prepare auth data structure */
3999
4000 switch (req->auth_type) {
4001 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4002 auth_alg = WLAN_AUTH_OPEN;
4003 break;
4004 case NL80211_AUTHTYPE_SHARED_KEY:
4005 if (IS_ERR(local->wep_tx_tfm))
4006 return -EOPNOTSUPP;
4007 auth_alg = WLAN_AUTH_SHARED_KEY;
4008 break;
4009 case NL80211_AUTHTYPE_FT:
4010 auth_alg = WLAN_AUTH_FT;
4011 break;
4012 case NL80211_AUTHTYPE_NETWORK_EAP:
4013 auth_alg = WLAN_AUTH_LEAP;
4014 break;
4015 case NL80211_AUTHTYPE_SAE:
4016 auth_alg = WLAN_AUTH_SAE;
4017 break;
4018 default:
4019 return -EOPNOTSUPP;
4020 }
4021
4022 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4023 req->ie_len, GFP_KERNEL);
4024 if (!auth_data)
4025 return -ENOMEM;
4026
4027 auth_data->bss = req->bss;
4028
4029 if (req->sae_data_len >= 4) {
4030 __le16 *pos = (__le16 *) req->sae_data;
4031 auth_data->sae_trans = le16_to_cpu(pos[0]);
4032 auth_data->sae_status = le16_to_cpu(pos[1]);
4033 memcpy(auth_data->data, req->sae_data + 4,
4034 req->sae_data_len - 4);
4035 auth_data->data_len += req->sae_data_len - 4;
4036 }
4037
4038 if (req->ie && req->ie_len) {
4039 memcpy(&auth_data->data[auth_data->data_len],
4040 req->ie, req->ie_len);
4041 auth_data->data_len += req->ie_len;
4042 }
4043
4044 if (req->key && req->key_len) {
4045 auth_data->key_len = req->key_len;
4046 auth_data->key_idx = req->key_idx;
4047 memcpy(auth_data->key, req->key, req->key_len);
4048 }
4049
4050 auth_data->algorithm = auth_alg;
4051
4052 /* try to authenticate/probe */
4053
4054 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4055 ifmgd->assoc_data) {
4056 err = -EBUSY;
4057 goto err_free;
4058 }
4059
4060 if (ifmgd->auth_data)
4061 ieee80211_destroy_auth_data(sdata, false);
4062
4063 /* prep auth_data so we don't go into idle on disassoc */
4064 ifmgd->auth_data = auth_data;
4065
4066 if (ifmgd->associated) {
4067 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4068
4069 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4070 WLAN_REASON_UNSPECIFIED,
4071 false, frame_buf);
4072
4073 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4074 sizeof(frame_buf));
4075 }
4076
4077 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4078
4079 err = ieee80211_prep_connection(sdata, req->bss, false);
4080 if (err)
4081 goto err_clear;
4082
4083 err = ieee80211_probe_auth(sdata);
4084 if (err) {
4085 sta_info_destroy_addr(sdata, req->bss->bssid);
4086 goto err_clear;
4087 }
4088
4089 /* hold our own reference */
4090 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4091 return 0;
4092
4093 err_clear:
4094 memset(ifmgd->bssid, 0, ETH_ALEN);
4095 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4096 ifmgd->auth_data = NULL;
4097 err_free:
4098 kfree(auth_data);
4099 return err;
4100 }
4101
4102 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4103 struct cfg80211_assoc_request *req)
4104 {
4105 struct ieee80211_local *local = sdata->local;
4106 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4107 struct ieee80211_bss *bss = (void *)req->bss->priv;
4108 struct ieee80211_mgd_assoc_data *assoc_data;
4109 const struct cfg80211_bss_ies *beacon_ies;
4110 struct ieee80211_supported_band *sband;
4111 const u8 *ssidie, *ht_ie, *vht_ie;
4112 int i, err;
4113
4114 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4115 if (!assoc_data)
4116 return -ENOMEM;
4117
4118 rcu_read_lock();
4119 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4120 if (!ssidie) {
4121 rcu_read_unlock();
4122 kfree(assoc_data);
4123 return -EINVAL;
4124 }
4125 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4126 assoc_data->ssid_len = ssidie[1];
4127 rcu_read_unlock();
4128
4129 if (ifmgd->associated) {
4130 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4131
4132 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4133 WLAN_REASON_UNSPECIFIED,
4134 false, frame_buf);
4135
4136 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4137 sizeof(frame_buf));
4138 }
4139
4140 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4141 err = -EBUSY;
4142 goto err_free;
4143 }
4144
4145 if (ifmgd->assoc_data) {
4146 err = -EBUSY;
4147 goto err_free;
4148 }
4149
4150 if (ifmgd->auth_data) {
4151 bool match;
4152
4153 /* keep sta info, bssid if matching */
4154 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4155 ieee80211_destroy_auth_data(sdata, match);
4156 }
4157
4158 /* prepare assoc data */
4159
4160 ifmgd->beacon_crc_valid = false;
4161
4162 /*
4163 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4164 * We still associate in non-HT mode (11a/b/g) if any one of these
4165 * ciphers is configured as pairwise.
4166 * We can set this to true for non-11n hardware, that'll be checked
4167 * separately along with the peer capabilities.
4168 */
4169 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4170 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4171 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4172 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4173 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4174 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4175 netdev_info(sdata->dev,
4176 "disabling HT/VHT due to WEP/TKIP use\n");
4177 }
4178 }
4179
4180 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4181 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4182 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4183 }
4184
4185 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4186 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4187
4188 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4189 sband = local->hw.wiphy->bands[req->bss->channel->band];
4190 if (!sband->ht_cap.ht_supported ||
4191 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4192 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4193 if (!bss->wmm_used)
4194 netdev_info(sdata->dev,
4195 "disabling HT as WMM/QoS is not supported by the AP\n");
4196 }
4197
4198 /* disable VHT if we don't support it or the AP doesn't use WMM */
4199 if (!sband->vht_cap.vht_supported ||
4200 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4201 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4202 if (!bss->wmm_used)
4203 netdev_info(sdata->dev,
4204 "disabling VHT as WMM/QoS is not supported by the AP\n");
4205 }
4206
4207 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4208 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4209 sizeof(ifmgd->ht_capa_mask));
4210
4211 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4212 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4213 sizeof(ifmgd->vht_capa_mask));
4214
4215 if (req->ie && req->ie_len) {
4216 memcpy(assoc_data->ie, req->ie, req->ie_len);
4217 assoc_data->ie_len = req->ie_len;
4218 }
4219
4220 assoc_data->bss = req->bss;
4221
4222 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4223 if (ifmgd->powersave)
4224 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4225 else
4226 sdata->smps_mode = IEEE80211_SMPS_OFF;
4227 } else
4228 sdata->smps_mode = ifmgd->req_smps;
4229
4230 assoc_data->capability = req->bss->capability;
4231 assoc_data->wmm = bss->wmm_used &&
4232 (local->hw.queues >= IEEE80211_NUM_ACS);
4233 assoc_data->supp_rates = bss->supp_rates;
4234 assoc_data->supp_rates_len = bss->supp_rates_len;
4235
4236 rcu_read_lock();
4237 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4238 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4239 assoc_data->ap_ht_param =
4240 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4241 else
4242 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4243 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4244 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4245 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4246 sizeof(struct ieee80211_vht_cap));
4247 else
4248 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4249 rcu_read_unlock();
4250
4251 if (bss->wmm_used && bss->uapsd_supported &&
4252 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4253 sdata->wmm_acm != 0xff) {
4254 assoc_data->uapsd = true;
4255 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4256 } else {
4257 assoc_data->uapsd = false;
4258 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4259 }
4260
4261 if (req->prev_bssid)
4262 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4263
4264 if (req->use_mfp) {
4265 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4266 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4267 } else {
4268 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4269 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4270 }
4271
4272 if (req->crypto.control_port)
4273 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4274 else
4275 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4276
4277 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4278 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4279
4280 /* kick off associate process */
4281
4282 ifmgd->assoc_data = assoc_data;
4283 ifmgd->dtim_period = 0;
4284 ifmgd->have_beacon = false;
4285
4286 err = ieee80211_prep_connection(sdata, req->bss, true);
4287 if (err)
4288 goto err_clear;
4289
4290 rcu_read_lock();
4291 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4292
4293 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4294 !beacon_ies) {
4295 /*
4296 * Wait up to one beacon interval ...
4297 * should this be more if we miss one?
4298 */
4299 sdata_info(sdata, "waiting for beacon from %pM\n",
4300 ifmgd->bssid);
4301 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4302 assoc_data->timeout_started = true;
4303 assoc_data->need_beacon = true;
4304 } else if (beacon_ies) {
4305 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4306 beacon_ies->data,
4307 beacon_ies->len);
4308 u8 dtim_count = 0;
4309
4310 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4311 const struct ieee80211_tim_ie *tim;
4312 tim = (void *)(tim_ie + 2);
4313 ifmgd->dtim_period = tim->dtim_period;
4314 dtim_count = tim->dtim_count;
4315 }
4316 ifmgd->have_beacon = true;
4317 assoc_data->timeout = jiffies;
4318 assoc_data->timeout_started = true;
4319
4320 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4321 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4322 sdata->vif.bss_conf.sync_device_ts =
4323 bss->device_ts_beacon;
4324 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4325 }
4326 } else {
4327 assoc_data->timeout = jiffies;
4328 assoc_data->timeout_started = true;
4329 }
4330 rcu_read_unlock();
4331
4332 run_again(sdata, assoc_data->timeout);
4333
4334 if (bss->corrupt_data) {
4335 char *corrupt_type = "data";
4336 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4337 if (bss->corrupt_data &
4338 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4339 corrupt_type = "beacon and probe response";
4340 else
4341 corrupt_type = "beacon";
4342 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4343 corrupt_type = "probe response";
4344 sdata_info(sdata, "associating with AP with corrupt %s\n",
4345 corrupt_type);
4346 }
4347
4348 return 0;
4349 err_clear:
4350 memset(ifmgd->bssid, 0, ETH_ALEN);
4351 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4352 ifmgd->assoc_data = NULL;
4353 err_free:
4354 kfree(assoc_data);
4355 return err;
4356 }
4357
4358 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4359 struct cfg80211_deauth_request *req)
4360 {
4361 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4362 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4363 bool tx = !req->local_state_change;
4364 bool report_frame = false;
4365
4366 sdata_info(sdata,
4367 "deauthenticating from %pM by local choice (reason=%d)\n",
4368 req->bssid, req->reason_code);
4369
4370 if (ifmgd->auth_data) {
4371 drv_mgd_prepare_tx(sdata->local, sdata);
4372 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4373 IEEE80211_STYPE_DEAUTH,
4374 req->reason_code, tx,
4375 frame_buf);
4376 ieee80211_destroy_auth_data(sdata, false);
4377
4378 report_frame = true;
4379 goto out;
4380 }
4381
4382 if (ifmgd->associated &&
4383 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4384 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4385 req->reason_code, tx, frame_buf);
4386 report_frame = true;
4387 }
4388
4389 out:
4390 if (report_frame)
4391 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4392 IEEE80211_DEAUTH_FRAME_LEN);
4393
4394 return 0;
4395 }
4396
4397 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4398 struct cfg80211_disassoc_request *req)
4399 {
4400 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4401 u8 bssid[ETH_ALEN];
4402 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4403
4404 /*
4405 * cfg80211 should catch this ... but it's racy since
4406 * we can receive a disassoc frame, process it, hand it
4407 * to cfg80211 while that's in a locked section already
4408 * trying to tell us that the user wants to disconnect.
4409 */
4410 if (ifmgd->associated != req->bss)
4411 return -ENOLINK;
4412
4413 sdata_info(sdata,
4414 "disassociating from %pM by local choice (reason=%d)\n",
4415 req->bss->bssid, req->reason_code);
4416
4417 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4419 req->reason_code, !req->local_state_change,
4420 frame_buf);
4421
4422 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4423 IEEE80211_DEAUTH_FRAME_LEN);
4424
4425 return 0;
4426 }
4427
4428 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4429 {
4430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4431
4432 /*
4433 * Make sure some work items will not run after this,
4434 * they will not do anything but might not have been
4435 * cancelled when disconnecting.
4436 */
4437 cancel_work_sync(&ifmgd->monitor_work);
4438 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4439 cancel_work_sync(&ifmgd->request_smps_work);
4440 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4441 cancel_work_sync(&ifmgd->chswitch_work);
4442
4443 sdata_lock(sdata);
4444 if (ifmgd->assoc_data) {
4445 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4446 ieee80211_destroy_assoc_data(sdata, false);
4447 cfg80211_assoc_timeout(sdata->dev, bss);
4448 }
4449 if (ifmgd->auth_data)
4450 ieee80211_destroy_auth_data(sdata, false);
4451 del_timer_sync(&ifmgd->timer);
4452 sdata_unlock(sdata);
4453 }
4454
4455 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4456 enum nl80211_cqm_rssi_threshold_event rssi_event,
4457 gfp_t gfp)
4458 {
4459 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4460
4461 trace_api_cqm_rssi_notify(sdata, rssi_event);
4462
4463 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4464 }
4465 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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