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Merge tag 'ntb-3.12' of git://github.com/jonmason/ntb
[mirror_ubuntu-artful-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_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
52
53 /*
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
60 */
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
65
66 /*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
71 /*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
81
82 /*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
89 /*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
95 /*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
107 {
108 sdata_assert_lock(sdata);
109
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
113 }
114
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
116 {
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
118 return;
119
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
125 }
126
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128 {
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
139
140 ifmgd->probe_send_count = 0;
141 }
142
143 static int ecw2cw(int ecw)
144 {
145 return (1 << ecw) - 1;
146 }
147
148 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
149 {
150 u32 ret;
151 int tmp;
152
153 switch (c->width) {
154 case NL80211_CHAN_WIDTH_20:
155 c->width = NL80211_CHAN_WIDTH_20_NOHT;
156 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
157 break;
158 case NL80211_CHAN_WIDTH_40:
159 c->width = NL80211_CHAN_WIDTH_20;
160 c->center_freq1 = c->chan->center_freq;
161 ret = IEEE80211_STA_DISABLE_40MHZ |
162 IEEE80211_STA_DISABLE_VHT;
163 break;
164 case NL80211_CHAN_WIDTH_80:
165 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
166 /* n_P40 */
167 tmp /= 2;
168 /* freq_P40 */
169 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
170 c->width = NL80211_CHAN_WIDTH_40;
171 ret = IEEE80211_STA_DISABLE_VHT;
172 break;
173 case NL80211_CHAN_WIDTH_80P80:
174 c->center_freq2 = 0;
175 c->width = NL80211_CHAN_WIDTH_80;
176 ret = IEEE80211_STA_DISABLE_80P80MHZ |
177 IEEE80211_STA_DISABLE_160MHZ;
178 break;
179 case NL80211_CHAN_WIDTH_160:
180 /* n_P20 */
181 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
182 /* n_P80 */
183 tmp /= 4;
184 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
185 c->width = NL80211_CHAN_WIDTH_80;
186 ret = IEEE80211_STA_DISABLE_80P80MHZ |
187 IEEE80211_STA_DISABLE_160MHZ;
188 break;
189 default:
190 case NL80211_CHAN_WIDTH_20_NOHT:
191 WARN_ON_ONCE(1);
192 c->width = NL80211_CHAN_WIDTH_20_NOHT;
193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 break;
195 case NL80211_CHAN_WIDTH_5:
196 case NL80211_CHAN_WIDTH_10:
197 WARN_ON_ONCE(1);
198 /* keep c->width */
199 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
200 break;
201 }
202
203 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
204
205 return ret;
206 }
207
208 static u32
209 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
210 struct ieee80211_supported_band *sband,
211 struct ieee80211_channel *channel,
212 const struct ieee80211_ht_operation *ht_oper,
213 const struct ieee80211_vht_operation *vht_oper,
214 struct cfg80211_chan_def *chandef, bool tracking)
215 {
216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
217 struct cfg80211_chan_def vht_chandef;
218 u32 ht_cfreq, ret;
219
220 chandef->chan = channel;
221 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
222 chandef->center_freq1 = channel->center_freq;
223 chandef->center_freq2 = 0;
224
225 if (!ht_oper || !sband->ht_cap.ht_supported) {
226 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
227 goto out;
228 }
229
230 chandef->width = NL80211_CHAN_WIDTH_20;
231
232 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
233 channel->band);
234 /* check that channel matches the right operating channel */
235 if (!tracking && channel->center_freq != ht_cfreq) {
236 /*
237 * It's possible that some APs are confused here;
238 * Netgear WNDR3700 sometimes reports 4 higher than
239 * the actual channel in association responses, but
240 * since we look at probe response/beacon data here
241 * it should be OK.
242 */
243 sdata_info(sdata,
244 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
245 channel->center_freq, ht_cfreq,
246 ht_oper->primary_chan, channel->band);
247 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
248 goto out;
249 }
250
251 /* check 40 MHz support, if we have it */
252 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
253 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
254 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
255 chandef->width = NL80211_CHAN_WIDTH_40;
256 chandef->center_freq1 += 10;
257 break;
258 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
259 chandef->width = NL80211_CHAN_WIDTH_40;
260 chandef->center_freq1 -= 10;
261 break;
262 }
263 } else {
264 /* 40 MHz (and 80 MHz) must be supported for VHT */
265 ret = IEEE80211_STA_DISABLE_VHT;
266 /* also mark 40 MHz disabled */
267 ret |= IEEE80211_STA_DISABLE_40MHZ;
268 goto out;
269 }
270
271 if (!vht_oper || !sband->vht_cap.vht_supported) {
272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 vht_chandef.chan = channel;
277 vht_chandef.center_freq1 =
278 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
279 channel->band);
280 vht_chandef.center_freq2 = 0;
281
282 switch (vht_oper->chan_width) {
283 case IEEE80211_VHT_CHANWIDTH_USE_HT:
284 vht_chandef.width = chandef->width;
285 break;
286 case IEEE80211_VHT_CHANWIDTH_80MHZ:
287 vht_chandef.width = NL80211_CHAN_WIDTH_80;
288 break;
289 case IEEE80211_VHT_CHANWIDTH_160MHZ:
290 vht_chandef.width = NL80211_CHAN_WIDTH_160;
291 break;
292 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
293 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
294 vht_chandef.center_freq2 =
295 ieee80211_channel_to_frequency(
296 vht_oper->center_freq_seg2_idx,
297 channel->band);
298 break;
299 default:
300 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
301 sdata_info(sdata,
302 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
303 vht_oper->chan_width);
304 ret = IEEE80211_STA_DISABLE_VHT;
305 goto out;
306 }
307
308 if (!cfg80211_chandef_valid(&vht_chandef)) {
309 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
310 sdata_info(sdata,
311 "AP VHT information is invalid, disable VHT\n");
312 ret = IEEE80211_STA_DISABLE_VHT;
313 goto out;
314 }
315
316 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
317 ret = 0;
318 goto out;
319 }
320
321 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
322 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
323 sdata_info(sdata,
324 "AP VHT information doesn't match HT, disable VHT\n");
325 ret = IEEE80211_STA_DISABLE_VHT;
326 goto out;
327 }
328
329 *chandef = vht_chandef;
330
331 ret = 0;
332
333 out:
334 /* don't print the message below for VHT mismatch if VHT is disabled */
335 if (ret & IEEE80211_STA_DISABLE_VHT)
336 vht_chandef = *chandef;
337
338 /*
339 * Ignore the DISABLED flag when we're already connected and only
340 * tracking the APs beacon for bandwidth changes - otherwise we
341 * might get disconnected here if we connect to an AP, update our
342 * regulatory information based on the AP's country IE and the
343 * information we have is wrong/outdated and disables the channel
344 * that we're actually using for the connection to the AP.
345 */
346 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
347 tracking ? 0 :
348 IEEE80211_CHAN_DISABLED)) {
349 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
350 ret = IEEE80211_STA_DISABLE_HT |
351 IEEE80211_STA_DISABLE_VHT;
352 break;
353 }
354
355 ret |= chandef_downgrade(chandef);
356 }
357
358 if (chandef->width != vht_chandef.width && !tracking)
359 sdata_info(sdata,
360 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
361
362 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
363 return ret;
364 }
365
366 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
367 struct sta_info *sta,
368 const struct ieee80211_ht_operation *ht_oper,
369 const struct ieee80211_vht_operation *vht_oper,
370 const u8 *bssid, u32 *changed)
371 {
372 struct ieee80211_local *local = sdata->local;
373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
374 struct ieee80211_supported_band *sband;
375 struct ieee80211_channel *chan;
376 struct cfg80211_chan_def chandef;
377 u16 ht_opmode;
378 u32 flags;
379 enum ieee80211_sta_rx_bandwidth new_sta_bw;
380 int ret;
381
382 /* if HT was/is disabled, don't track any bandwidth changes */
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
384 return 0;
385
386 /* don't check VHT if we associated as non-VHT station */
387 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
388 vht_oper = NULL;
389
390 if (WARN_ON_ONCE(!sta))
391 return -EINVAL;
392
393 chan = sdata->vif.bss_conf.chandef.chan;
394 sband = local->hw.wiphy->bands[chan->band];
395
396 /* calculate new channel (type) based on HT/VHT operation IEs */
397 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
398 vht_oper, &chandef, true);
399
400 /*
401 * Downgrade the new channel if we associated with restricted
402 * capabilities. For example, if we associated as a 20 MHz STA
403 * to a 40 MHz AP (due to regulatory, capabilities or config
404 * reasons) then switching to a 40 MHz channel now won't do us
405 * any good -- we couldn't use it with the AP.
406 */
407 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
408 chandef.width == NL80211_CHAN_WIDTH_80P80)
409 flags |= chandef_downgrade(&chandef);
410 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
411 chandef.width == NL80211_CHAN_WIDTH_160)
412 flags |= chandef_downgrade(&chandef);
413 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
414 chandef.width > NL80211_CHAN_WIDTH_20)
415 flags |= chandef_downgrade(&chandef);
416
417 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
418 return 0;
419
420 sdata_info(sdata,
421 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
422 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
423 chandef.center_freq1, chandef.center_freq2);
424
425 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
426 IEEE80211_STA_DISABLE_VHT |
427 IEEE80211_STA_DISABLE_40MHZ |
428 IEEE80211_STA_DISABLE_80P80MHZ |
429 IEEE80211_STA_DISABLE_160MHZ)) ||
430 !cfg80211_chandef_valid(&chandef)) {
431 sdata_info(sdata,
432 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
433 ifmgd->bssid);
434 return -EINVAL;
435 }
436
437 switch (chandef.width) {
438 case NL80211_CHAN_WIDTH_20_NOHT:
439 case NL80211_CHAN_WIDTH_20:
440 new_sta_bw = IEEE80211_STA_RX_BW_20;
441 break;
442 case NL80211_CHAN_WIDTH_40:
443 new_sta_bw = IEEE80211_STA_RX_BW_40;
444 break;
445 case NL80211_CHAN_WIDTH_80:
446 new_sta_bw = IEEE80211_STA_RX_BW_80;
447 break;
448 case NL80211_CHAN_WIDTH_80P80:
449 case NL80211_CHAN_WIDTH_160:
450 new_sta_bw = IEEE80211_STA_RX_BW_160;
451 break;
452 default:
453 return -EINVAL;
454 }
455
456 if (new_sta_bw > sta->cur_max_bandwidth)
457 new_sta_bw = sta->cur_max_bandwidth;
458
459 if (new_sta_bw < sta->sta.bandwidth) {
460 sta->sta.bandwidth = new_sta_bw;
461 rate_control_rate_update(local, sband, sta,
462 IEEE80211_RC_BW_CHANGED);
463 }
464
465 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
466 if (ret) {
467 sdata_info(sdata,
468 "AP %pM changed bandwidth to incompatible one - disconnect\n",
469 ifmgd->bssid);
470 return ret;
471 }
472
473 if (new_sta_bw > sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
477 }
478
479 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
480
481 /* if bss configuration changed store the new one */
482 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
483 *changed |= BSS_CHANGED_HT;
484 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
485 }
486
487 return 0;
488 }
489
490 /* frame sending functions */
491
492 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
493 struct sk_buff *skb, u8 ap_ht_param,
494 struct ieee80211_supported_band *sband,
495 struct ieee80211_channel *channel,
496 enum ieee80211_smps_mode smps)
497 {
498 u8 *pos;
499 u32 flags = channel->flags;
500 u16 cap;
501 struct ieee80211_sta_ht_cap ht_cap;
502
503 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
504
505 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
506 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
507
508 /* determine capability flags */
509 cap = ht_cap.cap;
510
511 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
512 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
513 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
515 cap &= ~IEEE80211_HT_CAP_SGI_40;
516 }
517 break;
518 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
519 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
520 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
521 cap &= ~IEEE80211_HT_CAP_SGI_40;
522 }
523 break;
524 }
525
526 /*
527 * If 40 MHz was disabled associate as though we weren't
528 * capable of 40 MHz -- some broken APs will never fall
529 * back to trying to transmit in 20 MHz.
530 */
531 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
532 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
533 cap &= ~IEEE80211_HT_CAP_SGI_40;
534 }
535
536 /* set SM PS mode properly */
537 cap &= ~IEEE80211_HT_CAP_SM_PS;
538 switch (smps) {
539 case IEEE80211_SMPS_AUTOMATIC:
540 case IEEE80211_SMPS_NUM_MODES:
541 WARN_ON(1);
542 case IEEE80211_SMPS_OFF:
543 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
544 IEEE80211_HT_CAP_SM_PS_SHIFT;
545 break;
546 case IEEE80211_SMPS_STATIC:
547 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
548 IEEE80211_HT_CAP_SM_PS_SHIFT;
549 break;
550 case IEEE80211_SMPS_DYNAMIC:
551 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
552 IEEE80211_HT_CAP_SM_PS_SHIFT;
553 break;
554 }
555
556 /* reserve and fill IE */
557 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
558 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
559 }
560
561 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
562 struct sk_buff *skb,
563 struct ieee80211_supported_band *sband,
564 struct ieee80211_vht_cap *ap_vht_cap)
565 {
566 u8 *pos;
567 u32 cap;
568 struct ieee80211_sta_vht_cap vht_cap;
569
570 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
571
572 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
573 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
574
575 /* determine capability flags */
576 cap = vht_cap.cap;
577
578 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
579 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
580 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
581 }
582
583 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
584 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
585 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
586 }
587
588 /*
589 * Some APs apparently get confused if our capabilities are better
590 * than theirs, so restrict what we advertise in the assoc request.
591 */
592 if (!(ap_vht_cap->vht_cap_info &
593 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
594 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
595
596 /* reserve and fill IE */
597 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
598 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
599 }
600
601 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
602 {
603 struct ieee80211_local *local = sdata->local;
604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
605 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
606 struct sk_buff *skb;
607 struct ieee80211_mgmt *mgmt;
608 u8 *pos, qos_info;
609 size_t offset = 0, noffset;
610 int i, count, rates_len, supp_rates_len, shift;
611 u16 capab;
612 struct ieee80211_supported_band *sband;
613 struct ieee80211_chanctx_conf *chanctx_conf;
614 struct ieee80211_channel *chan;
615 u32 rate_flags, rates = 0;
616
617 sdata_assert_lock(sdata);
618
619 rcu_read_lock();
620 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
621 if (WARN_ON(!chanctx_conf)) {
622 rcu_read_unlock();
623 return;
624 }
625 chan = chanctx_conf->def.chan;
626 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
627 rcu_read_unlock();
628 sband = local->hw.wiphy->bands[chan->band];
629 shift = ieee80211_vif_get_shift(&sdata->vif);
630
631 if (assoc_data->supp_rates_len) {
632 /*
633 * Get all rates supported by the device and the AP as
634 * some APs don't like getting a superset of their rates
635 * in the association request (e.g. D-Link DAP 1353 in
636 * b-only mode)...
637 */
638 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
639 assoc_data->supp_rates,
640 assoc_data->supp_rates_len,
641 &rates);
642 } else {
643 /*
644 * In case AP not provide any supported rates information
645 * before association, we send information element(s) with
646 * all rates that we support.
647 */
648 rates_len = 0;
649 for (i = 0; i < sband->n_bitrates; i++) {
650 if ((rate_flags & sband->bitrates[i].flags)
651 != rate_flags)
652 continue;
653 rates |= BIT(i);
654 rates_len++;
655 }
656 }
657
658 skb = alloc_skb(local->hw.extra_tx_headroom +
659 sizeof(*mgmt) + /* bit too much but doesn't matter */
660 2 + assoc_data->ssid_len + /* SSID */
661 4 + rates_len + /* (extended) rates */
662 4 + /* power capability */
663 2 + 2 * sband->n_channels + /* supported channels */
664 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
665 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
666 assoc_data->ie_len + /* extra IEs */
667 9, /* WMM */
668 GFP_KERNEL);
669 if (!skb)
670 return;
671
672 skb_reserve(skb, local->hw.extra_tx_headroom);
673
674 capab = WLAN_CAPABILITY_ESS;
675
676 if (sband->band == IEEE80211_BAND_2GHZ) {
677 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
678 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
679 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
680 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
681 }
682
683 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
684 capab |= WLAN_CAPABILITY_PRIVACY;
685
686 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
687 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
688 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
689
690 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
691 memset(mgmt, 0, 24);
692 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
693 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
694 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
695
696 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
697 skb_put(skb, 10);
698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
699 IEEE80211_STYPE_REASSOC_REQ);
700 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.reassoc_req.listen_interval =
702 cpu_to_le16(local->hw.conf.listen_interval);
703 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
704 ETH_ALEN);
705 } else {
706 skb_put(skb, 4);
707 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
708 IEEE80211_STYPE_ASSOC_REQ);
709 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
710 mgmt->u.assoc_req.listen_interval =
711 cpu_to_le16(local->hw.conf.listen_interval);
712 }
713
714 /* SSID */
715 pos = skb_put(skb, 2 + assoc_data->ssid_len);
716 *pos++ = WLAN_EID_SSID;
717 *pos++ = assoc_data->ssid_len;
718 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
719
720 /* add all rates which were marked to be used above */
721 supp_rates_len = rates_len;
722 if (supp_rates_len > 8)
723 supp_rates_len = 8;
724
725 pos = skb_put(skb, supp_rates_len + 2);
726 *pos++ = WLAN_EID_SUPP_RATES;
727 *pos++ = supp_rates_len;
728
729 count = 0;
730 for (i = 0; i < sband->n_bitrates; i++) {
731 if (BIT(i) & rates) {
732 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
733 5 * (1 << shift));
734 *pos++ = (u8) rate;
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;
748 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
749 5 * (1 << shift));
750 *pos++ = (u8) rate;
751 }
752 }
753 }
754
755 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
756 /* 1. power capabilities */
757 pos = skb_put(skb, 4);
758 *pos++ = WLAN_EID_PWR_CAPABILITY;
759 *pos++ = 2;
760 *pos++ = 0; /* min tx power */
761 /* max tx power */
762 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
763
764 /* 2. supported channels */
765 /* TODO: get this in reg domain format */
766 pos = skb_put(skb, 2 * sband->n_channels + 2);
767 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
768 *pos++ = 2 * sband->n_channels;
769 for (i = 0; i < sband->n_channels; i++) {
770 *pos++ = ieee80211_frequency_to_channel(
771 sband->channels[i].center_freq);
772 *pos++ = 1; /* one channel in the subband*/
773 }
774 }
775
776 /* if present, add any custom IEs that go before HT */
777 if (assoc_data->ie_len && assoc_data->ie) {
778 static const u8 before_ht[] = {
779 WLAN_EID_SSID,
780 WLAN_EID_SUPP_RATES,
781 WLAN_EID_EXT_SUPP_RATES,
782 WLAN_EID_PWR_CAPABILITY,
783 WLAN_EID_SUPPORTED_CHANNELS,
784 WLAN_EID_RSN,
785 WLAN_EID_QOS_CAPA,
786 WLAN_EID_RRM_ENABLED_CAPABILITIES,
787 WLAN_EID_MOBILITY_DOMAIN,
788 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
789 };
790 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
791 before_ht, ARRAY_SIZE(before_ht),
792 offset);
793 pos = skb_put(skb, noffset - offset);
794 memcpy(pos, assoc_data->ie + offset, noffset - offset);
795 offset = noffset;
796 }
797
798 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
799 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
800 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
801
802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
803 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
804 sband, chan, sdata->smps_mode);
805
806 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
807 ieee80211_add_vht_ie(sdata, skb, sband,
808 &assoc_data->ap_vht_cap);
809
810 /* if present, add any custom non-vendor IEs that go after HT */
811 if (assoc_data->ie_len && assoc_data->ie) {
812 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
813 assoc_data->ie_len,
814 offset);
815 pos = skb_put(skb, noffset - offset);
816 memcpy(pos, assoc_data->ie + offset, noffset - offset);
817 offset = noffset;
818 }
819
820 if (assoc_data->wmm) {
821 if (assoc_data->uapsd) {
822 qos_info = ifmgd->uapsd_queues;
823 qos_info |= (ifmgd->uapsd_max_sp_len <<
824 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
825 } else {
826 qos_info = 0;
827 }
828
829 pos = skb_put(skb, 9);
830 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
831 *pos++ = 7; /* len */
832 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
833 *pos++ = 0x50;
834 *pos++ = 0xf2;
835 *pos++ = 2; /* WME */
836 *pos++ = 0; /* WME info */
837 *pos++ = 1; /* WME ver */
838 *pos++ = qos_info;
839 }
840
841 /* add any remaining custom (i.e. vendor specific here) IEs */
842 if (assoc_data->ie_len && assoc_data->ie) {
843 noffset = assoc_data->ie_len;
844 pos = skb_put(skb, noffset - offset);
845 memcpy(pos, assoc_data->ie + offset, noffset - offset);
846 }
847
848 drv_mgd_prepare_tx(local, sdata);
849
850 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
851 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
852 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
853 IEEE80211_TX_INTFL_MLME_CONN_TX;
854 ieee80211_tx_skb(sdata, skb);
855 }
856
857 void ieee80211_send_pspoll(struct ieee80211_local *local,
858 struct ieee80211_sub_if_data *sdata)
859 {
860 struct ieee80211_pspoll *pspoll;
861 struct sk_buff *skb;
862
863 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
864 if (!skb)
865 return;
866
867 pspoll = (struct ieee80211_pspoll *) skb->data;
868 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
869
870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
871 ieee80211_tx_skb(sdata, skb);
872 }
873
874 void ieee80211_send_nullfunc(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata,
876 int powersave)
877 {
878 struct sk_buff *skb;
879 struct ieee80211_hdr_3addr *nullfunc;
880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
881
882 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
883 if (!skb)
884 return;
885
886 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
887 if (powersave)
888 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
889
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
891 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
892
893 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
895
896 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
897 IEEE80211_STA_CONNECTION_POLL))
898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
899
900 ieee80211_tx_skb(sdata, skb);
901 }
902
903 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
904 struct ieee80211_sub_if_data *sdata)
905 {
906 struct sk_buff *skb;
907 struct ieee80211_hdr *nullfunc;
908 __le16 fc;
909
910 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
911 return;
912
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
914 if (!skb)
915 return;
916
917 skb_reserve(skb, local->hw.extra_tx_headroom);
918
919 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
920 memset(nullfunc, 0, 30);
921 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
922 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
923 nullfunc->frame_control = fc;
924 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
925 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
926 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
927 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
928
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
930 ieee80211_tx_skb(sdata, skb);
931 }
932
933 /* spectrum management related things */
934 static void ieee80211_chswitch_work(struct work_struct *work)
935 {
936 struct ieee80211_sub_if_data *sdata =
937 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
938 struct ieee80211_local *local = sdata->local;
939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
940
941 if (!ieee80211_sdata_running(sdata))
942 return;
943
944 sdata_lock(sdata);
945 if (!ifmgd->associated)
946 goto out;
947
948 local->_oper_chandef = local->csa_chandef;
949
950 if (!local->ops->channel_switch) {
951 /* call "hw_config" only if doing sw channel switch */
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
953 } else {
954 /* update the device channel directly */
955 local->hw.conf.chandef = local->_oper_chandef;
956 }
957
958 /* XXX: shouldn't really modify cfg80211-owned data! */
959 ifmgd->associated->channel = local->_oper_chandef.chan;
960
961 /* XXX: wait for a beacon first? */
962 ieee80211_wake_queues_by_reason(&local->hw,
963 IEEE80211_MAX_QUEUE_MAP,
964 IEEE80211_QUEUE_STOP_REASON_CSA);
965 out:
966 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
967 sdata_unlock(sdata);
968 }
969
970 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
971 {
972 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
974
975 trace_api_chswitch_done(sdata, success);
976 if (!success) {
977 sdata_info(sdata,
978 "driver channel switch failed, disconnecting\n");
979 ieee80211_queue_work(&sdata->local->hw,
980 &ifmgd->csa_connection_drop_work);
981 } else {
982 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
983 }
984 }
985 EXPORT_SYMBOL(ieee80211_chswitch_done);
986
987 static void ieee80211_chswitch_timer(unsigned long data)
988 {
989 struct ieee80211_sub_if_data *sdata =
990 (struct ieee80211_sub_if_data *) data;
991
992 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
993 }
994
995 static void
996 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
997 u64 timestamp, struct ieee802_11_elems *elems,
998 bool beacon)
999 {
1000 struct ieee80211_local *local = sdata->local;
1001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1002 struct cfg80211_bss *cbss = ifmgd->associated;
1003 struct ieee80211_bss *bss;
1004 struct ieee80211_chanctx *chanctx;
1005 enum ieee80211_band new_band;
1006 int new_freq;
1007 u8 new_chan_no;
1008 u8 count;
1009 u8 mode;
1010 struct ieee80211_channel *new_chan;
1011 struct cfg80211_chan_def new_chandef = {};
1012 struct cfg80211_chan_def new_vht_chandef = {};
1013 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1014 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1015 const struct ieee80211_ht_operation *ht_oper;
1016 int secondary_channel_offset = -1;
1017
1018 sdata_assert_lock(sdata);
1019
1020 if (!cbss)
1021 return;
1022
1023 if (local->scanning)
1024 return;
1025
1026 /* disregard subsequent announcements if we are already processing */
1027 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1028 return;
1029
1030 sec_chan_offs = elems->sec_chan_offs;
1031 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1032 ht_oper = elems->ht_operation;
1033
1034 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1035 IEEE80211_STA_DISABLE_40MHZ)) {
1036 sec_chan_offs = NULL;
1037 wide_bw_chansw_ie = NULL;
1038 /* only used for bandwidth here */
1039 ht_oper = NULL;
1040 }
1041
1042 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1043 wide_bw_chansw_ie = NULL;
1044
1045 if (elems->ext_chansw_ie) {
1046 if (!ieee80211_operating_class_to_band(
1047 elems->ext_chansw_ie->new_operating_class,
1048 &new_band)) {
1049 sdata_info(sdata,
1050 "cannot understand ECSA IE operating class %d, disconnecting\n",
1051 elems->ext_chansw_ie->new_operating_class);
1052 ieee80211_queue_work(&local->hw,
1053 &ifmgd->csa_connection_drop_work);
1054 }
1055 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1056 count = elems->ext_chansw_ie->count;
1057 mode = elems->ext_chansw_ie->mode;
1058 } else if (elems->ch_switch_ie) {
1059 new_band = cbss->channel->band;
1060 new_chan_no = elems->ch_switch_ie->new_ch_num;
1061 count = elems->ch_switch_ie->count;
1062 mode = elems->ch_switch_ie->mode;
1063 } else {
1064 /* nothing here we understand */
1065 return;
1066 }
1067
1068 bss = (void *)cbss->priv;
1069
1070 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1071 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1072 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1073 sdata_info(sdata,
1074 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1075 ifmgd->associated->bssid, new_freq);
1076 ieee80211_queue_work(&local->hw,
1077 &ifmgd->csa_connection_drop_work);
1078 return;
1079 }
1080
1081 if (!beacon && sec_chan_offs) {
1082 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1083 } else if (beacon && ht_oper) {
1084 secondary_channel_offset =
1085 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1086 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1087 /*
1088 * If it's not a beacon, HT is enabled and the IE not present,
1089 * it's 20 MHz, 802.11-2012 8.5.2.6:
1090 * This element [the Secondary Channel Offset Element] is
1091 * present when switching to a 40 MHz channel. It may be
1092 * present when switching to a 20 MHz channel (in which
1093 * case the secondary channel offset is set to SCN).
1094 */
1095 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1096 }
1097
1098 switch (secondary_channel_offset) {
1099 default:
1100 /* secondary_channel_offset was present but is invalid */
1101 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1102 cfg80211_chandef_create(&new_chandef, new_chan,
1103 NL80211_CHAN_HT20);
1104 break;
1105 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1106 cfg80211_chandef_create(&new_chandef, new_chan,
1107 NL80211_CHAN_HT40PLUS);
1108 break;
1109 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1110 cfg80211_chandef_create(&new_chandef, new_chan,
1111 NL80211_CHAN_HT40MINUS);
1112 break;
1113 case -1:
1114 cfg80211_chandef_create(&new_chandef, new_chan,
1115 NL80211_CHAN_NO_HT);
1116 /* keep width for 5/10 MHz channels */
1117 switch (sdata->vif.bss_conf.chandef.width) {
1118 case NL80211_CHAN_WIDTH_5:
1119 case NL80211_CHAN_WIDTH_10:
1120 new_chandef.width = sdata->vif.bss_conf.chandef.width;
1121 break;
1122 default:
1123 break;
1124 }
1125 break;
1126 }
1127
1128 if (wide_bw_chansw_ie) {
1129 new_vht_chandef.chan = new_chan;
1130 new_vht_chandef.center_freq1 =
1131 ieee80211_channel_to_frequency(
1132 wide_bw_chansw_ie->new_center_freq_seg0,
1133 new_band);
1134
1135 switch (wide_bw_chansw_ie->new_channel_width) {
1136 default:
1137 /* hmmm, ignore VHT and use HT if present */
1138 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1139 new_vht_chandef.chan = NULL;
1140 break;
1141 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1142 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1143 break;
1144 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1145 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1146 break;
1147 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1148 /* field is otherwise reserved */
1149 new_vht_chandef.center_freq2 =
1150 ieee80211_channel_to_frequency(
1151 wide_bw_chansw_ie->new_center_freq_seg1,
1152 new_band);
1153 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1154 break;
1155 }
1156 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1157 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1158 chandef_downgrade(&new_vht_chandef);
1159 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1160 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1161 chandef_downgrade(&new_vht_chandef);
1162 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1163 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1164 chandef_downgrade(&new_vht_chandef);
1165 }
1166
1167 /* if VHT data is there validate & use it */
1168 if (new_vht_chandef.chan) {
1169 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1170 &new_chandef)) {
1171 sdata_info(sdata,
1172 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1173 ifmgd->associated->bssid);
1174 ieee80211_queue_work(&local->hw,
1175 &ifmgd->csa_connection_drop_work);
1176 return;
1177 }
1178 new_chandef = new_vht_chandef;
1179 }
1180
1181 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1182 IEEE80211_CHAN_DISABLED)) {
1183 sdata_info(sdata,
1184 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1185 ifmgd->associated->bssid, new_freq,
1186 new_chandef.width, new_chandef.center_freq1,
1187 new_chandef.center_freq2);
1188 ieee80211_queue_work(&local->hw,
1189 &ifmgd->csa_connection_drop_work);
1190 return;
1191 }
1192
1193 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1194
1195 if (local->use_chanctx) {
1196 sdata_info(sdata,
1197 "not handling channel switch with channel contexts\n");
1198 ieee80211_queue_work(&local->hw,
1199 &ifmgd->csa_connection_drop_work);
1200 return;
1201 }
1202
1203 mutex_lock(&local->chanctx_mtx);
1204 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1205 mutex_unlock(&local->chanctx_mtx);
1206 return;
1207 }
1208 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1209 struct ieee80211_chanctx, conf);
1210 if (chanctx->refcount > 1) {
1211 sdata_info(sdata,
1212 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1213 ieee80211_queue_work(&local->hw,
1214 &ifmgd->csa_connection_drop_work);
1215 mutex_unlock(&local->chanctx_mtx);
1216 return;
1217 }
1218 mutex_unlock(&local->chanctx_mtx);
1219
1220 local->csa_chandef = new_chandef;
1221
1222 if (mode)
1223 ieee80211_stop_queues_by_reason(&local->hw,
1224 IEEE80211_MAX_QUEUE_MAP,
1225 IEEE80211_QUEUE_STOP_REASON_CSA);
1226
1227 if (local->ops->channel_switch) {
1228 /* use driver's channel switch callback */
1229 struct ieee80211_channel_switch ch_switch = {
1230 .timestamp = timestamp,
1231 .block_tx = mode,
1232 .chandef = new_chandef,
1233 .count = count,
1234 };
1235
1236 drv_channel_switch(local, &ch_switch);
1237 return;
1238 }
1239
1240 /* channel switch handled in software */
1241 if (count <= 1)
1242 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1243 else
1244 mod_timer(&ifmgd->chswitch_timer,
1245 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1246 }
1247
1248 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1249 struct ieee80211_channel *channel,
1250 const u8 *country_ie, u8 country_ie_len,
1251 const u8 *pwr_constr_elem)
1252 {
1253 struct ieee80211_country_ie_triplet *triplet;
1254 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1255 int i, chan_pwr, chan_increment, new_ap_level;
1256 bool have_chan_pwr = false;
1257
1258 /* Invalid IE */
1259 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1260 return 0;
1261
1262 triplet = (void *)(country_ie + 3);
1263 country_ie_len -= 3;
1264
1265 switch (channel->band) {
1266 default:
1267 WARN_ON_ONCE(1);
1268 /* fall through */
1269 case IEEE80211_BAND_2GHZ:
1270 case IEEE80211_BAND_60GHZ:
1271 chan_increment = 1;
1272 break;
1273 case IEEE80211_BAND_5GHZ:
1274 chan_increment = 4;
1275 break;
1276 }
1277
1278 /* find channel */
1279 while (country_ie_len >= 3) {
1280 u8 first_channel = triplet->chans.first_channel;
1281
1282 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1283 goto next;
1284
1285 for (i = 0; i < triplet->chans.num_channels; i++) {
1286 if (first_channel + i * chan_increment == chan) {
1287 have_chan_pwr = true;
1288 chan_pwr = triplet->chans.max_power;
1289 break;
1290 }
1291 }
1292 if (have_chan_pwr)
1293 break;
1294
1295 next:
1296 triplet++;
1297 country_ie_len -= 3;
1298 }
1299
1300 if (!have_chan_pwr)
1301 return 0;
1302
1303 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1304
1305 if (sdata->ap_power_level == new_ap_level)
1306 return 0;
1307
1308 sdata_info(sdata,
1309 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1310 new_ap_level, chan_pwr, *pwr_constr_elem,
1311 sdata->u.mgd.bssid);
1312 sdata->ap_power_level = new_ap_level;
1313 if (__ieee80211_recalc_txpower(sdata))
1314 return BSS_CHANGED_TXPOWER;
1315 return 0;
1316 }
1317
1318 /* powersave */
1319 static void ieee80211_enable_ps(struct ieee80211_local *local,
1320 struct ieee80211_sub_if_data *sdata)
1321 {
1322 struct ieee80211_conf *conf = &local->hw.conf;
1323
1324 /*
1325 * If we are scanning right now then the parameters will
1326 * take effect when scan finishes.
1327 */
1328 if (local->scanning)
1329 return;
1330
1331 if (conf->dynamic_ps_timeout > 0 &&
1332 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1333 mod_timer(&local->dynamic_ps_timer, jiffies +
1334 msecs_to_jiffies(conf->dynamic_ps_timeout));
1335 } else {
1336 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1337 ieee80211_send_nullfunc(local, sdata, 1);
1338
1339 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1340 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1341 return;
1342
1343 conf->flags |= IEEE80211_CONF_PS;
1344 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1345 }
1346 }
1347
1348 static void ieee80211_change_ps(struct ieee80211_local *local)
1349 {
1350 struct ieee80211_conf *conf = &local->hw.conf;
1351
1352 if (local->ps_sdata) {
1353 ieee80211_enable_ps(local, local->ps_sdata);
1354 } else if (conf->flags & IEEE80211_CONF_PS) {
1355 conf->flags &= ~IEEE80211_CONF_PS;
1356 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1357 del_timer_sync(&local->dynamic_ps_timer);
1358 cancel_work_sync(&local->dynamic_ps_enable_work);
1359 }
1360 }
1361
1362 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1363 {
1364 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1365 struct sta_info *sta = NULL;
1366 bool authorized = false;
1367
1368 if (!mgd->powersave)
1369 return false;
1370
1371 if (mgd->broken_ap)
1372 return false;
1373
1374 if (!mgd->associated)
1375 return false;
1376
1377 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1378 IEEE80211_STA_CONNECTION_POLL))
1379 return false;
1380
1381 if (!mgd->have_beacon)
1382 return false;
1383
1384 rcu_read_lock();
1385 sta = sta_info_get(sdata, mgd->bssid);
1386 if (sta)
1387 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1388 rcu_read_unlock();
1389
1390 return authorized;
1391 }
1392
1393 /* need to hold RTNL or interface lock */
1394 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1395 {
1396 struct ieee80211_sub_if_data *sdata, *found = NULL;
1397 int count = 0;
1398 int timeout;
1399
1400 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1401 local->ps_sdata = NULL;
1402 return;
1403 }
1404
1405 list_for_each_entry(sdata, &local->interfaces, list) {
1406 if (!ieee80211_sdata_running(sdata))
1407 continue;
1408 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1409 /* If an AP vif is found, then disable PS
1410 * by setting the count to zero thereby setting
1411 * ps_sdata to NULL.
1412 */
1413 count = 0;
1414 break;
1415 }
1416 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1417 continue;
1418 found = sdata;
1419 count++;
1420 }
1421
1422 if (count == 1 && ieee80211_powersave_allowed(found)) {
1423 s32 beaconint_us;
1424
1425 if (latency < 0)
1426 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1427
1428 beaconint_us = ieee80211_tu_to_usec(
1429 found->vif.bss_conf.beacon_int);
1430
1431 timeout = local->dynamic_ps_forced_timeout;
1432 if (timeout < 0) {
1433 /*
1434 * Go to full PSM if the user configures a very low
1435 * latency requirement.
1436 * The 2000 second value is there for compatibility
1437 * until the PM_QOS_NETWORK_LATENCY is configured
1438 * with real values.
1439 */
1440 if (latency > (1900 * USEC_PER_MSEC) &&
1441 latency != (2000 * USEC_PER_SEC))
1442 timeout = 0;
1443 else
1444 timeout = 100;
1445 }
1446 local->hw.conf.dynamic_ps_timeout = timeout;
1447
1448 if (beaconint_us > latency) {
1449 local->ps_sdata = NULL;
1450 } else {
1451 int maxslp = 1;
1452 u8 dtimper = found->u.mgd.dtim_period;
1453
1454 /* If the TIM IE is invalid, pretend the value is 1 */
1455 if (!dtimper)
1456 dtimper = 1;
1457 else if (dtimper > 1)
1458 maxslp = min_t(int, dtimper,
1459 latency / beaconint_us);
1460
1461 local->hw.conf.max_sleep_period = maxslp;
1462 local->hw.conf.ps_dtim_period = dtimper;
1463 local->ps_sdata = found;
1464 }
1465 } else {
1466 local->ps_sdata = NULL;
1467 }
1468
1469 ieee80211_change_ps(local);
1470 }
1471
1472 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1473 {
1474 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1475
1476 if (sdata->vif.bss_conf.ps != ps_allowed) {
1477 sdata->vif.bss_conf.ps = ps_allowed;
1478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1479 }
1480 }
1481
1482 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1483 {
1484 struct ieee80211_local *local =
1485 container_of(work, struct ieee80211_local,
1486 dynamic_ps_disable_work);
1487
1488 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1489 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1490 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1491 }
1492
1493 ieee80211_wake_queues_by_reason(&local->hw,
1494 IEEE80211_MAX_QUEUE_MAP,
1495 IEEE80211_QUEUE_STOP_REASON_PS);
1496 }
1497
1498 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1499 {
1500 struct ieee80211_local *local =
1501 container_of(work, struct ieee80211_local,
1502 dynamic_ps_enable_work);
1503 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1504 struct ieee80211_if_managed *ifmgd;
1505 unsigned long flags;
1506 int q;
1507
1508 /* can only happen when PS was just disabled anyway */
1509 if (!sdata)
1510 return;
1511
1512 ifmgd = &sdata->u.mgd;
1513
1514 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1515 return;
1516
1517 if (local->hw.conf.dynamic_ps_timeout > 0) {
1518 /* don't enter PS if TX frames are pending */
1519 if (drv_tx_frames_pending(local)) {
1520 mod_timer(&local->dynamic_ps_timer, jiffies +
1521 msecs_to_jiffies(
1522 local->hw.conf.dynamic_ps_timeout));
1523 return;
1524 }
1525
1526 /*
1527 * transmission can be stopped by others which leads to
1528 * dynamic_ps_timer expiry. Postpone the ps timer if it
1529 * is not the actual idle state.
1530 */
1531 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1532 for (q = 0; q < local->hw.queues; q++) {
1533 if (local->queue_stop_reasons[q]) {
1534 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1535 flags);
1536 mod_timer(&local->dynamic_ps_timer, jiffies +
1537 msecs_to_jiffies(
1538 local->hw.conf.dynamic_ps_timeout));
1539 return;
1540 }
1541 }
1542 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1543 }
1544
1545 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1546 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1547 if (drv_tx_frames_pending(local)) {
1548 mod_timer(&local->dynamic_ps_timer, jiffies +
1549 msecs_to_jiffies(
1550 local->hw.conf.dynamic_ps_timeout));
1551 } else {
1552 ieee80211_send_nullfunc(local, sdata, 1);
1553 /* Flush to get the tx status of nullfunc frame */
1554 ieee80211_flush_queues(local, sdata);
1555 }
1556 }
1557
1558 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1559 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1560 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1561 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1562 local->hw.conf.flags |= IEEE80211_CONF_PS;
1563 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1564 }
1565 }
1566
1567 void ieee80211_dynamic_ps_timer(unsigned long data)
1568 {
1569 struct ieee80211_local *local = (void *) data;
1570
1571 if (local->quiescing || local->suspended)
1572 return;
1573
1574 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1575 }
1576
1577 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1578 {
1579 struct delayed_work *delayed_work =
1580 container_of(work, struct delayed_work, work);
1581 struct ieee80211_sub_if_data *sdata =
1582 container_of(delayed_work, struct ieee80211_sub_if_data,
1583 dfs_cac_timer_work);
1584
1585 ieee80211_vif_release_channel(sdata);
1586
1587 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1588 }
1589
1590 /* MLME */
1591 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1592 struct ieee80211_sub_if_data *sdata,
1593 const u8 *wmm_param, size_t wmm_param_len)
1594 {
1595 struct ieee80211_tx_queue_params params;
1596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1597 size_t left;
1598 int count;
1599 const u8 *pos;
1600 u8 uapsd_queues = 0;
1601
1602 if (!local->ops->conf_tx)
1603 return false;
1604
1605 if (local->hw.queues < IEEE80211_NUM_ACS)
1606 return false;
1607
1608 if (!wmm_param)
1609 return false;
1610
1611 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1612 return false;
1613
1614 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1615 uapsd_queues = ifmgd->uapsd_queues;
1616
1617 count = wmm_param[6] & 0x0f;
1618 if (count == ifmgd->wmm_last_param_set)
1619 return false;
1620 ifmgd->wmm_last_param_set = count;
1621
1622 pos = wmm_param + 8;
1623 left = wmm_param_len - 8;
1624
1625 memset(&params, 0, sizeof(params));
1626
1627 sdata->wmm_acm = 0;
1628 for (; left >= 4; left -= 4, pos += 4) {
1629 int aci = (pos[0] >> 5) & 0x03;
1630 int acm = (pos[0] >> 4) & 0x01;
1631 bool uapsd = false;
1632 int queue;
1633
1634 switch (aci) {
1635 case 1: /* AC_BK */
1636 queue = 3;
1637 if (acm)
1638 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1639 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1640 uapsd = true;
1641 break;
1642 case 2: /* AC_VI */
1643 queue = 1;
1644 if (acm)
1645 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1646 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1647 uapsd = true;
1648 break;
1649 case 3: /* AC_VO */
1650 queue = 0;
1651 if (acm)
1652 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1654 uapsd = true;
1655 break;
1656 case 0: /* AC_BE */
1657 default:
1658 queue = 2;
1659 if (acm)
1660 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1661 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1662 uapsd = true;
1663 break;
1664 }
1665
1666 params.aifs = pos[0] & 0x0f;
1667 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1668 params.cw_min = ecw2cw(pos[1] & 0x0f);
1669 params.txop = get_unaligned_le16(pos + 2);
1670 params.acm = acm;
1671 params.uapsd = uapsd;
1672
1673 mlme_dbg(sdata,
1674 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1675 queue, aci, acm,
1676 params.aifs, params.cw_min, params.cw_max,
1677 params.txop, params.uapsd);
1678 sdata->tx_conf[queue] = params;
1679 if (drv_conf_tx(local, sdata, queue, &params))
1680 sdata_err(sdata,
1681 "failed to set TX queue parameters for queue %d\n",
1682 queue);
1683 }
1684
1685 /* enable WMM or activate new settings */
1686 sdata->vif.bss_conf.qos = true;
1687 return true;
1688 }
1689
1690 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1691 {
1692 lockdep_assert_held(&sdata->local->mtx);
1693
1694 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1695 IEEE80211_STA_BEACON_POLL);
1696 ieee80211_run_deferred_scan(sdata->local);
1697 }
1698
1699 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1700 {
1701 mutex_lock(&sdata->local->mtx);
1702 __ieee80211_stop_poll(sdata);
1703 mutex_unlock(&sdata->local->mtx);
1704 }
1705
1706 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1707 u16 capab, bool erp_valid, u8 erp)
1708 {
1709 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1710 u32 changed = 0;
1711 bool use_protection;
1712 bool use_short_preamble;
1713 bool use_short_slot;
1714
1715 if (erp_valid) {
1716 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1717 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1718 } else {
1719 use_protection = false;
1720 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1721 }
1722
1723 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1724 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1725 use_short_slot = true;
1726
1727 if (use_protection != bss_conf->use_cts_prot) {
1728 bss_conf->use_cts_prot = use_protection;
1729 changed |= BSS_CHANGED_ERP_CTS_PROT;
1730 }
1731
1732 if (use_short_preamble != bss_conf->use_short_preamble) {
1733 bss_conf->use_short_preamble = use_short_preamble;
1734 changed |= BSS_CHANGED_ERP_PREAMBLE;
1735 }
1736
1737 if (use_short_slot != bss_conf->use_short_slot) {
1738 bss_conf->use_short_slot = use_short_slot;
1739 changed |= BSS_CHANGED_ERP_SLOT;
1740 }
1741
1742 return changed;
1743 }
1744
1745 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1746 struct cfg80211_bss *cbss,
1747 u32 bss_info_changed)
1748 {
1749 struct ieee80211_bss *bss = (void *)cbss->priv;
1750 struct ieee80211_local *local = sdata->local;
1751 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1752
1753 bss_info_changed |= BSS_CHANGED_ASSOC;
1754 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1755 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1756
1757 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1758 beacon_loss_count * bss_conf->beacon_int));
1759
1760 sdata->u.mgd.associated = cbss;
1761 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1762
1763 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1764
1765 if (sdata->vif.p2p) {
1766 const struct cfg80211_bss_ies *ies;
1767
1768 rcu_read_lock();
1769 ies = rcu_dereference(cbss->ies);
1770 if (ies) {
1771 int ret;
1772
1773 ret = cfg80211_get_p2p_attr(
1774 ies->data, ies->len,
1775 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1776 (u8 *) &bss_conf->p2p_noa_attr,
1777 sizeof(bss_conf->p2p_noa_attr));
1778 if (ret >= 2) {
1779 sdata->u.mgd.p2p_noa_index =
1780 bss_conf->p2p_noa_attr.index;
1781 bss_info_changed |= BSS_CHANGED_P2P_PS;
1782 }
1783 }
1784 rcu_read_unlock();
1785 }
1786
1787 /* just to be sure */
1788 ieee80211_stop_poll(sdata);
1789
1790 ieee80211_led_assoc(local, 1);
1791
1792 if (sdata->u.mgd.have_beacon) {
1793 /*
1794 * If the AP is buggy we may get here with no DTIM period
1795 * known, so assume it's 1 which is the only safe assumption
1796 * in that case, although if the TIM IE is broken powersave
1797 * probably just won't work at all.
1798 */
1799 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1800 bss_conf->beacon_rate = bss->beacon_rate;
1801 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1802 } else {
1803 bss_conf->beacon_rate = NULL;
1804 bss_conf->dtim_period = 0;
1805 }
1806
1807 bss_conf->assoc = 1;
1808
1809 /* Tell the driver to monitor connection quality (if supported) */
1810 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1811 bss_conf->cqm_rssi_thold)
1812 bss_info_changed |= BSS_CHANGED_CQM;
1813
1814 /* Enable ARP filtering */
1815 if (bss_conf->arp_addr_cnt)
1816 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1817
1818 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1819
1820 mutex_lock(&local->iflist_mtx);
1821 ieee80211_recalc_ps(local, -1);
1822 mutex_unlock(&local->iflist_mtx);
1823
1824 ieee80211_recalc_smps(sdata);
1825 ieee80211_recalc_ps_vif(sdata);
1826
1827 netif_carrier_on(sdata->dev);
1828 }
1829
1830 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1831 u16 stype, u16 reason, bool tx,
1832 u8 *frame_buf)
1833 {
1834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1835 struct ieee80211_local *local = sdata->local;
1836 u32 changed = 0;
1837
1838 sdata_assert_lock(sdata);
1839
1840 if (WARN_ON_ONCE(tx && !frame_buf))
1841 return;
1842
1843 if (WARN_ON(!ifmgd->associated))
1844 return;
1845
1846 ieee80211_stop_poll(sdata);
1847
1848 ifmgd->associated = NULL;
1849 netif_carrier_off(sdata->dev);
1850
1851 /*
1852 * if we want to get out of ps before disassoc (why?) we have
1853 * to do it before sending disassoc, as otherwise the null-packet
1854 * won't be valid.
1855 */
1856 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1857 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1858 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1859 }
1860 local->ps_sdata = NULL;
1861
1862 /* disable per-vif ps */
1863 ieee80211_recalc_ps_vif(sdata);
1864
1865 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1866 if (tx)
1867 ieee80211_flush_queues(local, sdata);
1868
1869 /* deauthenticate/disassociate now */
1870 if (tx || frame_buf)
1871 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1872 reason, tx, frame_buf);
1873
1874 /* flush out frame */
1875 if (tx)
1876 ieee80211_flush_queues(local, sdata);
1877
1878 /* clear bssid only after building the needed mgmt frames */
1879 memset(ifmgd->bssid, 0, ETH_ALEN);
1880
1881 /* remove AP and TDLS peers */
1882 sta_info_flush_defer(sdata);
1883
1884 /* finally reset all BSS / config parameters */
1885 changed |= ieee80211_reset_erp_info(sdata);
1886
1887 ieee80211_led_assoc(local, 0);
1888 changed |= BSS_CHANGED_ASSOC;
1889 sdata->vif.bss_conf.assoc = false;
1890
1891 ifmgd->p2p_noa_index = -1;
1892 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1893 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1894
1895 /* on the next assoc, re-program HT/VHT parameters */
1896 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1897 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1898 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1899 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1900
1901 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1902
1903 del_timer_sync(&local->dynamic_ps_timer);
1904 cancel_work_sync(&local->dynamic_ps_enable_work);
1905
1906 /* Disable ARP filtering */
1907 if (sdata->vif.bss_conf.arp_addr_cnt)
1908 changed |= BSS_CHANGED_ARP_FILTER;
1909
1910 sdata->vif.bss_conf.qos = false;
1911 changed |= BSS_CHANGED_QOS;
1912
1913 /* The BSSID (not really interesting) and HT changed */
1914 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1915 ieee80211_bss_info_change_notify(sdata, changed);
1916
1917 /* disassociated - set to defaults now */
1918 ieee80211_set_wmm_default(sdata, false);
1919
1920 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1921 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1922 del_timer_sync(&sdata->u.mgd.timer);
1923 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1924
1925 sdata->vif.bss_conf.dtim_period = 0;
1926 sdata->vif.bss_conf.beacon_rate = NULL;
1927
1928 ifmgd->have_beacon = false;
1929
1930 ifmgd->flags = 0;
1931 ieee80211_vif_release_channel(sdata);
1932 }
1933
1934 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1935 struct ieee80211_hdr *hdr)
1936 {
1937 /*
1938 * We can postpone the mgd.timer whenever receiving unicast frames
1939 * from AP because we know that the connection is working both ways
1940 * at that time. But multicast frames (and hence also beacons) must
1941 * be ignored here, because we need to trigger the timer during
1942 * data idle periods for sending the periodic probe request to the
1943 * AP we're connected to.
1944 */
1945 if (is_multicast_ether_addr(hdr->addr1))
1946 return;
1947
1948 ieee80211_sta_reset_conn_monitor(sdata);
1949 }
1950
1951 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1952 {
1953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1954 struct ieee80211_local *local = sdata->local;
1955
1956 mutex_lock(&local->mtx);
1957 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1958 IEEE80211_STA_CONNECTION_POLL))) {
1959 mutex_unlock(&local->mtx);
1960 return;
1961 }
1962
1963 __ieee80211_stop_poll(sdata);
1964
1965 mutex_lock(&local->iflist_mtx);
1966 ieee80211_recalc_ps(local, -1);
1967 mutex_unlock(&local->iflist_mtx);
1968
1969 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1970 goto out;
1971
1972 /*
1973 * We've received a probe response, but are not sure whether
1974 * we have or will be receiving any beacons or data, so let's
1975 * schedule the timers again, just in case.
1976 */
1977 ieee80211_sta_reset_beacon_monitor(sdata);
1978
1979 mod_timer(&ifmgd->conn_mon_timer,
1980 round_jiffies_up(jiffies +
1981 IEEE80211_CONNECTION_IDLE_TIME));
1982 out:
1983 mutex_unlock(&local->mtx);
1984 }
1985
1986 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1987 struct ieee80211_hdr *hdr, bool ack)
1988 {
1989 if (!ieee80211_is_data(hdr->frame_control))
1990 return;
1991
1992 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1993 sdata->u.mgd.probe_send_count > 0) {
1994 if (ack)
1995 ieee80211_sta_reset_conn_monitor(sdata);
1996 else
1997 sdata->u.mgd.nullfunc_failed = true;
1998 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1999 return;
2000 }
2001
2002 if (ack)
2003 ieee80211_sta_reset_conn_monitor(sdata);
2004 }
2005
2006 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2007 {
2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2009 const u8 *ssid;
2010 u8 *dst = ifmgd->associated->bssid;
2011 u8 unicast_limit = max(1, max_probe_tries - 3);
2012
2013 /*
2014 * Try sending broadcast probe requests for the last three
2015 * probe requests after the first ones failed since some
2016 * buggy APs only support broadcast probe requests.
2017 */
2018 if (ifmgd->probe_send_count >= unicast_limit)
2019 dst = NULL;
2020
2021 /*
2022 * When the hardware reports an accurate Tx ACK status, it's
2023 * better to send a nullfunc frame instead of a probe request,
2024 * as it will kick us off the AP quickly if we aren't associated
2025 * anymore. The timeout will be reset if the frame is ACKed by
2026 * the AP.
2027 */
2028 ifmgd->probe_send_count++;
2029
2030 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2031 ifmgd->nullfunc_failed = false;
2032 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2033 } else {
2034 int ssid_len;
2035
2036 rcu_read_lock();
2037 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2038 if (WARN_ON_ONCE(ssid == NULL))
2039 ssid_len = 0;
2040 else
2041 ssid_len = ssid[1];
2042
2043 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2044 0, (u32) -1, true, 0,
2045 ifmgd->associated->channel, false);
2046 rcu_read_unlock();
2047 }
2048
2049 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2050 run_again(sdata, ifmgd->probe_timeout);
2051 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2052 ieee80211_flush_queues(sdata->local, sdata);
2053 }
2054
2055 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2056 bool beacon)
2057 {
2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2059 bool already = false;
2060
2061 if (!ieee80211_sdata_running(sdata))
2062 return;
2063
2064 sdata_lock(sdata);
2065
2066 if (!ifmgd->associated)
2067 goto out;
2068
2069 mutex_lock(&sdata->local->mtx);
2070
2071 if (sdata->local->tmp_channel || sdata->local->scanning) {
2072 mutex_unlock(&sdata->local->mtx);
2073 goto out;
2074 }
2075
2076 if (beacon) {
2077 mlme_dbg_ratelimited(sdata,
2078 "detected beacon loss from AP (missed %d beacons) - probing\n",
2079 beacon_loss_count);
2080
2081 ieee80211_cqm_rssi_notify(&sdata->vif,
2082 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2083 GFP_KERNEL);
2084 }
2085
2086 /*
2087 * The driver/our work has already reported this event or the
2088 * connection monitoring has kicked in and we have already sent
2089 * a probe request. Or maybe the AP died and the driver keeps
2090 * reporting until we disassociate...
2091 *
2092 * In either case we have to ignore the current call to this
2093 * function (except for setting the correct probe reason bit)
2094 * because otherwise we would reset the timer every time and
2095 * never check whether we received a probe response!
2096 */
2097 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2098 IEEE80211_STA_CONNECTION_POLL))
2099 already = true;
2100
2101 if (beacon)
2102 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2103 else
2104 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2105
2106 mutex_unlock(&sdata->local->mtx);
2107
2108 if (already)
2109 goto out;
2110
2111 mutex_lock(&sdata->local->iflist_mtx);
2112 ieee80211_recalc_ps(sdata->local, -1);
2113 mutex_unlock(&sdata->local->iflist_mtx);
2114
2115 ifmgd->probe_send_count = 0;
2116 ieee80211_mgd_probe_ap_send(sdata);
2117 out:
2118 sdata_unlock(sdata);
2119 }
2120
2121 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2122 struct ieee80211_vif *vif)
2123 {
2124 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2126 struct cfg80211_bss *cbss;
2127 struct sk_buff *skb;
2128 const u8 *ssid;
2129 int ssid_len;
2130
2131 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2132 return NULL;
2133
2134 sdata_assert_lock(sdata);
2135
2136 if (ifmgd->associated)
2137 cbss = ifmgd->associated;
2138 else if (ifmgd->auth_data)
2139 cbss = ifmgd->auth_data->bss;
2140 else if (ifmgd->assoc_data)
2141 cbss = ifmgd->assoc_data->bss;
2142 else
2143 return NULL;
2144
2145 rcu_read_lock();
2146 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2147 if (WARN_ON_ONCE(ssid == NULL))
2148 ssid_len = 0;
2149 else
2150 ssid_len = ssid[1];
2151
2152 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2153 (u32) -1, cbss->channel,
2154 ssid + 2, ssid_len,
2155 NULL, 0, true);
2156 rcu_read_unlock();
2157
2158 return skb;
2159 }
2160 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2161
2162 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2163 {
2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2165 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2166
2167 sdata_lock(sdata);
2168 if (!ifmgd->associated) {
2169 sdata_unlock(sdata);
2170 return;
2171 }
2172
2173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2174 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2175 true, frame_buf);
2176 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2177 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2178 IEEE80211_MAX_QUEUE_MAP,
2179 IEEE80211_QUEUE_STOP_REASON_CSA);
2180
2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2182 IEEE80211_DEAUTH_FRAME_LEN);
2183 sdata_unlock(sdata);
2184 }
2185
2186 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2187 {
2188 struct ieee80211_sub_if_data *sdata =
2189 container_of(work, struct ieee80211_sub_if_data,
2190 u.mgd.beacon_connection_loss_work);
2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct sta_info *sta;
2193
2194 if (ifmgd->associated) {
2195 rcu_read_lock();
2196 sta = sta_info_get(sdata, ifmgd->bssid);
2197 if (sta)
2198 sta->beacon_loss_count++;
2199 rcu_read_unlock();
2200 }
2201
2202 if (ifmgd->connection_loss) {
2203 sdata_info(sdata, "Connection to AP %pM lost\n",
2204 ifmgd->bssid);
2205 __ieee80211_disconnect(sdata);
2206 } else {
2207 ieee80211_mgd_probe_ap(sdata, true);
2208 }
2209 }
2210
2211 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2212 {
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.csa_connection_drop_work);
2216
2217 __ieee80211_disconnect(sdata);
2218 }
2219
2220 void ieee80211_beacon_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_beacon_loss(sdata);
2226
2227 sdata->u.mgd.connection_loss = false;
2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2229 }
2230 EXPORT_SYMBOL(ieee80211_beacon_loss);
2231
2232 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2233 {
2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2235 struct ieee80211_hw *hw = &sdata->local->hw;
2236
2237 trace_api_connection_loss(sdata);
2238
2239 sdata->u.mgd.connection_loss = true;
2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2241 }
2242 EXPORT_SYMBOL(ieee80211_connection_loss);
2243
2244
2245 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2246 bool assoc)
2247 {
2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2249
2250 sdata_assert_lock(sdata);
2251
2252 if (!assoc) {
2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2254
2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2257 sdata->u.mgd.flags = 0;
2258 ieee80211_vif_release_channel(sdata);
2259 }
2260
2261 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2262 kfree(auth_data);
2263 sdata->u.mgd.auth_data = NULL;
2264 }
2265
2266 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2267 struct ieee80211_mgmt *mgmt, size_t len)
2268 {
2269 struct ieee80211_local *local = sdata->local;
2270 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2271 u8 *pos;
2272 struct ieee802_11_elems elems;
2273 u32 tx_flags = 0;
2274
2275 pos = mgmt->u.auth.variable;
2276 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2277 if (!elems.challenge)
2278 return;
2279 auth_data->expected_transaction = 4;
2280 drv_mgd_prepare_tx(sdata->local, sdata);
2281 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2282 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2283 IEEE80211_TX_INTFL_MLME_CONN_TX;
2284 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2285 elems.challenge - 2, elems.challenge_len + 2,
2286 auth_data->bss->bssid, auth_data->bss->bssid,
2287 auth_data->key, auth_data->key_len,
2288 auth_data->key_idx, tx_flags);
2289 }
2290
2291 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2292 struct ieee80211_mgmt *mgmt, size_t len)
2293 {
2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2295 u8 bssid[ETH_ALEN];
2296 u16 auth_alg, auth_transaction, status_code;
2297 struct sta_info *sta;
2298
2299 sdata_assert_lock(sdata);
2300
2301 if (len < 24 + 6)
2302 return;
2303
2304 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2305 return;
2306
2307 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2308
2309 if (!ether_addr_equal(bssid, mgmt->bssid))
2310 return;
2311
2312 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2313 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2314 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2315
2316 if (auth_alg != ifmgd->auth_data->algorithm ||
2317 auth_transaction != ifmgd->auth_data->expected_transaction) {
2318 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2319 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2320 auth_transaction,
2321 ifmgd->auth_data->expected_transaction);
2322 return;
2323 }
2324
2325 if (status_code != WLAN_STATUS_SUCCESS) {
2326 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2327 mgmt->sa, status_code);
2328 ieee80211_destroy_auth_data(sdata, false);
2329 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2330 return;
2331 }
2332
2333 switch (ifmgd->auth_data->algorithm) {
2334 case WLAN_AUTH_OPEN:
2335 case WLAN_AUTH_LEAP:
2336 case WLAN_AUTH_FT:
2337 case WLAN_AUTH_SAE:
2338 break;
2339 case WLAN_AUTH_SHARED_KEY:
2340 if (ifmgd->auth_data->expected_transaction != 4) {
2341 ieee80211_auth_challenge(sdata, mgmt, len);
2342 /* need another frame */
2343 return;
2344 }
2345 break;
2346 default:
2347 WARN_ONCE(1, "invalid auth alg %d",
2348 ifmgd->auth_data->algorithm);
2349 return;
2350 }
2351
2352 sdata_info(sdata, "authenticated\n");
2353 ifmgd->auth_data->done = true;
2354 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2355 ifmgd->auth_data->timeout_started = true;
2356 run_again(sdata, ifmgd->auth_data->timeout);
2357
2358 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2359 ifmgd->auth_data->expected_transaction != 2) {
2360 /*
2361 * Report auth frame to user space for processing since another
2362 * round of Authentication frames is still needed.
2363 */
2364 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2365 return;
2366 }
2367
2368 /* move station state to auth */
2369 mutex_lock(&sdata->local->sta_mtx);
2370 sta = sta_info_get(sdata, bssid);
2371 if (!sta) {
2372 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2373 goto out_err;
2374 }
2375 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2376 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2377 goto out_err;
2378 }
2379 mutex_unlock(&sdata->local->sta_mtx);
2380
2381 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2382 return;
2383 out_err:
2384 mutex_unlock(&sdata->local->sta_mtx);
2385 /* ignore frame -- wait for timeout */
2386 }
2387
2388
2389 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2390 struct ieee80211_mgmt *mgmt, size_t len)
2391 {
2392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2393 const u8 *bssid = NULL;
2394 u16 reason_code;
2395
2396 sdata_assert_lock(sdata);
2397
2398 if (len < 24 + 2)
2399 return;
2400
2401 if (!ifmgd->associated ||
2402 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2403 return;
2404
2405 bssid = ifmgd->associated->bssid;
2406
2407 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2408
2409 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2410 bssid, reason_code);
2411
2412 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2413
2414 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2415 }
2416
2417
2418 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2419 struct ieee80211_mgmt *mgmt, size_t len)
2420 {
2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2422 u16 reason_code;
2423
2424 sdata_assert_lock(sdata);
2425
2426 if (len < 24 + 2)
2427 return;
2428
2429 if (!ifmgd->associated ||
2430 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2431 return;
2432
2433 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2434
2435 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2436 mgmt->sa, reason_code);
2437
2438 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2439
2440 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2441 }
2442
2443 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2444 u8 *supp_rates, unsigned int supp_rates_len,
2445 u32 *rates, u32 *basic_rates,
2446 bool *have_higher_than_11mbit,
2447 int *min_rate, int *min_rate_index,
2448 int shift, u32 rate_flags)
2449 {
2450 int i, j;
2451
2452 for (i = 0; i < supp_rates_len; i++) {
2453 int rate = supp_rates[i] & 0x7f;
2454 bool is_basic = !!(supp_rates[i] & 0x80);
2455
2456 if ((rate * 5 * (1 << shift)) > 110)
2457 *have_higher_than_11mbit = true;
2458
2459 /*
2460 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2461 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2462 *
2463 * Note: Even through the membership selector and the basic
2464 * rate flag share the same bit, they are not exactly
2465 * the same.
2466 */
2467 if (!!(supp_rates[i] & 0x80) &&
2468 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2469 continue;
2470
2471 for (j = 0; j < sband->n_bitrates; j++) {
2472 struct ieee80211_rate *br;
2473 int brate;
2474
2475 br = &sband->bitrates[j];
2476 if ((rate_flags & br->flags) != rate_flags)
2477 continue;
2478
2479 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2480 if (brate == rate) {
2481 *rates |= BIT(j);
2482 if (is_basic)
2483 *basic_rates |= BIT(j);
2484 if ((rate * 5) < *min_rate) {
2485 *min_rate = rate * 5;
2486 *min_rate_index = j;
2487 }
2488 break;
2489 }
2490 }
2491 }
2492 }
2493
2494 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2495 bool assoc)
2496 {
2497 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2498
2499 sdata_assert_lock(sdata);
2500
2501 if (!assoc) {
2502 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2503
2504 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2505 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2506 sdata->u.mgd.flags = 0;
2507 ieee80211_vif_release_channel(sdata);
2508 }
2509
2510 kfree(assoc_data);
2511 sdata->u.mgd.assoc_data = NULL;
2512 }
2513
2514 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2515 struct cfg80211_bss *cbss,
2516 struct ieee80211_mgmt *mgmt, size_t len)
2517 {
2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2519 struct ieee80211_local *local = sdata->local;
2520 struct ieee80211_supported_band *sband;
2521 struct sta_info *sta;
2522 u8 *pos;
2523 u16 capab_info, aid;
2524 struct ieee802_11_elems elems;
2525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2526 const struct cfg80211_bss_ies *bss_ies = NULL;
2527 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2528 u32 changed = 0;
2529 int err;
2530 bool ret;
2531
2532 /* AssocResp and ReassocResp have identical structure */
2533
2534 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2535 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2536
2537 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2538 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2539 aid);
2540 aid &= ~(BIT(15) | BIT(14));
2541
2542 ifmgd->broken_ap = false;
2543
2544 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2545 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2546 aid);
2547 aid = 0;
2548 ifmgd->broken_ap = true;
2549 }
2550
2551 pos = mgmt->u.assoc_resp.variable;
2552 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2553
2554 if (!elems.supp_rates) {
2555 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2556 return false;
2557 }
2558
2559 ifmgd->aid = aid;
2560
2561 /*
2562 * Some APs are erroneously not including some information in their
2563 * (re)association response frames. Try to recover by using the data
2564 * from the beacon or probe response. This seems to afflict mobile
2565 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2566 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2567 */
2568 if ((assoc_data->wmm && !elems.wmm_param) ||
2569 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2570 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2571 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2572 (!elems.vht_cap_elem || !elems.vht_operation))) {
2573 const struct cfg80211_bss_ies *ies;
2574 struct ieee802_11_elems bss_elems;
2575
2576 rcu_read_lock();
2577 ies = rcu_dereference(cbss->ies);
2578 if (ies)
2579 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2580 GFP_ATOMIC);
2581 rcu_read_unlock();
2582 if (!bss_ies)
2583 return false;
2584
2585 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2586 false, &bss_elems);
2587 if (assoc_data->wmm &&
2588 !elems.wmm_param && bss_elems.wmm_param) {
2589 elems.wmm_param = bss_elems.wmm_param;
2590 sdata_info(sdata,
2591 "AP bug: WMM param missing from AssocResp\n");
2592 }
2593
2594 /*
2595 * Also check if we requested HT/VHT, otherwise the AP doesn't
2596 * have to include the IEs in the (re)association response.
2597 */
2598 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2599 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2600 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2601 sdata_info(sdata,
2602 "AP bug: HT capability missing from AssocResp\n");
2603 }
2604 if (!elems.ht_operation && bss_elems.ht_operation &&
2605 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2606 elems.ht_operation = bss_elems.ht_operation;
2607 sdata_info(sdata,
2608 "AP bug: HT operation missing from AssocResp\n");
2609 }
2610 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2611 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2612 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2613 sdata_info(sdata,
2614 "AP bug: VHT capa missing from AssocResp\n");
2615 }
2616 if (!elems.vht_operation && bss_elems.vht_operation &&
2617 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2618 elems.vht_operation = bss_elems.vht_operation;
2619 sdata_info(sdata,
2620 "AP bug: VHT operation missing from AssocResp\n");
2621 }
2622 }
2623
2624 /*
2625 * We previously checked these in the beacon/probe response, so
2626 * they should be present here. This is just a safety net.
2627 */
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2629 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2630 sdata_info(sdata,
2631 "HT AP is missing WMM params or HT capability/operation\n");
2632 ret = false;
2633 goto out;
2634 }
2635
2636 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2637 (!elems.vht_cap_elem || !elems.vht_operation)) {
2638 sdata_info(sdata,
2639 "VHT AP is missing VHT capability/operation\n");
2640 ret = false;
2641 goto out;
2642 }
2643
2644 mutex_lock(&sdata->local->sta_mtx);
2645 /*
2646 * station info was already allocated and inserted before
2647 * the association and should be available to us
2648 */
2649 sta = sta_info_get(sdata, cbss->bssid);
2650 if (WARN_ON(!sta)) {
2651 mutex_unlock(&sdata->local->sta_mtx);
2652 ret = false;
2653 goto out;
2654 }
2655
2656 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2657
2658 /* Set up internal HT/VHT capabilities */
2659 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2660 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2661 elems.ht_cap_elem, sta);
2662
2663 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2664 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2665 elems.vht_cap_elem, sta);
2666
2667 /*
2668 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2669 * in their association response, so ignore that data for our own
2670 * configuration. If it changed since the last beacon, we'll get the
2671 * next beacon and update then.
2672 */
2673
2674 /*
2675 * If an operating mode notification IE is present, override the
2676 * NSS calculation (that would be done in rate_control_rate_init())
2677 * and use the # of streams from that element.
2678 */
2679 if (elems.opmode_notif &&
2680 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2681 u8 nss;
2682
2683 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2684 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2685 nss += 1;
2686 sta->sta.rx_nss = nss;
2687 }
2688
2689 rate_control_rate_init(sta);
2690
2691 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2692 set_sta_flag(sta, WLAN_STA_MFP);
2693
2694 if (elems.wmm_param)
2695 set_sta_flag(sta, WLAN_STA_WME);
2696
2697 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2698 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2699 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2700 if (err) {
2701 sdata_info(sdata,
2702 "failed to move station %pM to desired state\n",
2703 sta->sta.addr);
2704 WARN_ON(__sta_info_destroy(sta));
2705 mutex_unlock(&sdata->local->sta_mtx);
2706 ret = false;
2707 goto out;
2708 }
2709
2710 mutex_unlock(&sdata->local->sta_mtx);
2711
2712 /*
2713 * Always handle WMM once after association regardless
2714 * of the first value the AP uses. Setting -1 here has
2715 * that effect because the AP values is an unsigned
2716 * 4-bit value.
2717 */
2718 ifmgd->wmm_last_param_set = -1;
2719
2720 if (elems.wmm_param)
2721 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2722 elems.wmm_param_len);
2723 else
2724 ieee80211_set_wmm_default(sdata, false);
2725 changed |= BSS_CHANGED_QOS;
2726
2727 /* set AID and assoc capability,
2728 * ieee80211_set_associated() will tell the driver */
2729 bss_conf->aid = aid;
2730 bss_conf->assoc_capability = capab_info;
2731 ieee80211_set_associated(sdata, cbss, changed);
2732
2733 /*
2734 * If we're using 4-addr mode, let the AP know that we're
2735 * doing so, so that it can create the STA VLAN on its side
2736 */
2737 if (ifmgd->use_4addr)
2738 ieee80211_send_4addr_nullfunc(local, sdata);
2739
2740 /*
2741 * Start timer to probe the connection to the AP now.
2742 * Also start the timer that will detect beacon loss.
2743 */
2744 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2745 ieee80211_sta_reset_beacon_monitor(sdata);
2746
2747 ret = true;
2748 out:
2749 kfree(bss_ies);
2750 return ret;
2751 }
2752
2753 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2754 struct ieee80211_mgmt *mgmt,
2755 size_t len)
2756 {
2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2758 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2759 u16 capab_info, status_code, aid;
2760 struct ieee802_11_elems elems;
2761 u8 *pos;
2762 bool reassoc;
2763 struct cfg80211_bss *bss;
2764
2765 sdata_assert_lock(sdata);
2766
2767 if (!assoc_data)
2768 return;
2769 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2770 return;
2771
2772 /*
2773 * AssocResp and ReassocResp have identical structure, so process both
2774 * of them in this function.
2775 */
2776
2777 if (len < 24 + 6)
2778 return;
2779
2780 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2781 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2782 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2783 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2784
2785 sdata_info(sdata,
2786 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2787 reassoc ? "Rea" : "A", mgmt->sa,
2788 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2789
2790 pos = mgmt->u.assoc_resp.variable;
2791 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2792
2793 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2794 elems.timeout_int &&
2795 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2796 u32 tu, ms;
2797 tu = le32_to_cpu(elems.timeout_int->value);
2798 ms = tu * 1024 / 1000;
2799 sdata_info(sdata,
2800 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2801 mgmt->sa, tu, ms);
2802 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2803 assoc_data->timeout_started = true;
2804 if (ms > IEEE80211_ASSOC_TIMEOUT)
2805 run_again(sdata, assoc_data->timeout);
2806 return;
2807 }
2808
2809 bss = assoc_data->bss;
2810
2811 if (status_code != WLAN_STATUS_SUCCESS) {
2812 sdata_info(sdata, "%pM denied association (code=%d)\n",
2813 mgmt->sa, status_code);
2814 ieee80211_destroy_assoc_data(sdata, false);
2815 } else {
2816 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2817 /* oops -- internal error -- send timeout for now */
2818 ieee80211_destroy_assoc_data(sdata, false);
2819 cfg80211_assoc_timeout(sdata->dev, bss);
2820 return;
2821 }
2822 sdata_info(sdata, "associated\n");
2823
2824 /*
2825 * destroy assoc_data afterwards, as otherwise an idle
2826 * recalc after assoc_data is NULL but before associated
2827 * is set can cause the interface to go idle
2828 */
2829 ieee80211_destroy_assoc_data(sdata, true);
2830 }
2831
2832 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2833 }
2834
2835 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2836 struct ieee80211_mgmt *mgmt, size_t len,
2837 struct ieee80211_rx_status *rx_status,
2838 struct ieee802_11_elems *elems)
2839 {
2840 struct ieee80211_local *local = sdata->local;
2841 int freq;
2842 struct ieee80211_bss *bss;
2843 struct ieee80211_channel *channel;
2844
2845 sdata_assert_lock(sdata);
2846
2847 if (elems->ds_params)
2848 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2849 rx_status->band);
2850 else
2851 freq = rx_status->freq;
2852
2853 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2854
2855 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2856 return;
2857
2858 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2859 channel);
2860 if (bss) {
2861 ieee80211_rx_bss_put(local, bss);
2862 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2863 }
2864 }
2865
2866
2867 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2868 struct sk_buff *skb)
2869 {
2870 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2871 struct ieee80211_if_managed *ifmgd;
2872 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2873 size_t baselen, len = skb->len;
2874 struct ieee802_11_elems elems;
2875
2876 ifmgd = &sdata->u.mgd;
2877
2878 sdata_assert_lock(sdata);
2879
2880 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2881 return; /* ignore ProbeResp to foreign address */
2882
2883 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2884 if (baselen > len)
2885 return;
2886
2887 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2888 false, &elems);
2889
2890 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2891
2892 if (ifmgd->associated &&
2893 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2894 ieee80211_reset_ap_probe(sdata);
2895
2896 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2897 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2898 /* got probe response, continue with auth */
2899 sdata_info(sdata, "direct probe responded\n");
2900 ifmgd->auth_data->tries = 0;
2901 ifmgd->auth_data->timeout = jiffies;
2902 ifmgd->auth_data->timeout_started = true;
2903 run_again(sdata, ifmgd->auth_data->timeout);
2904 }
2905 }
2906
2907 /*
2908 * This is the canonical list of information elements we care about,
2909 * the filter code also gives us all changes to the Microsoft OUI
2910 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2911 *
2912 * We implement beacon filtering in software since that means we can
2913 * avoid processing the frame here and in cfg80211, and userspace
2914 * will not be able to tell whether the hardware supports it or not.
2915 *
2916 * XXX: This list needs to be dynamic -- userspace needs to be able to
2917 * add items it requires. It also needs to be able to tell us to
2918 * look out for other vendor IEs.
2919 */
2920 static const u64 care_about_ies =
2921 (1ULL << WLAN_EID_COUNTRY) |
2922 (1ULL << WLAN_EID_ERP_INFO) |
2923 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2924 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2925 (1ULL << WLAN_EID_HT_CAPABILITY) |
2926 (1ULL << WLAN_EID_HT_OPERATION);
2927
2928 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2929 struct ieee80211_mgmt *mgmt, size_t len,
2930 struct ieee80211_rx_status *rx_status)
2931 {
2932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2933 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2934 size_t baselen;
2935 struct ieee802_11_elems elems;
2936 struct ieee80211_local *local = sdata->local;
2937 struct ieee80211_chanctx_conf *chanctx_conf;
2938 struct ieee80211_channel *chan;
2939 struct sta_info *sta;
2940 u32 changed = 0;
2941 bool erp_valid;
2942 u8 erp_value = 0;
2943 u32 ncrc;
2944 u8 *bssid;
2945 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2946
2947 sdata_assert_lock(sdata);
2948
2949 /* Process beacon from the current BSS */
2950 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2951 if (baselen > len)
2952 return;
2953
2954 rcu_read_lock();
2955 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2956 if (!chanctx_conf) {
2957 rcu_read_unlock();
2958 return;
2959 }
2960
2961 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2962 rcu_read_unlock();
2963 return;
2964 }
2965 chan = chanctx_conf->def.chan;
2966 rcu_read_unlock();
2967
2968 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2969 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2970 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2971 len - baselen, false, &elems);
2972
2973 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2974 if (elems.tim && !elems.parse_error) {
2975 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2976 ifmgd->dtim_period = tim_ie->dtim_period;
2977 }
2978 ifmgd->have_beacon = true;
2979 ifmgd->assoc_data->need_beacon = false;
2980 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2981 sdata->vif.bss_conf.sync_tsf =
2982 le64_to_cpu(mgmt->u.beacon.timestamp);
2983 sdata->vif.bss_conf.sync_device_ts =
2984 rx_status->device_timestamp;
2985 if (elems.tim)
2986 sdata->vif.bss_conf.sync_dtim_count =
2987 elems.tim->dtim_count;
2988 else
2989 sdata->vif.bss_conf.sync_dtim_count = 0;
2990 }
2991 /* continue assoc process */
2992 ifmgd->assoc_data->timeout = jiffies;
2993 ifmgd->assoc_data->timeout_started = true;
2994 run_again(sdata, ifmgd->assoc_data->timeout);
2995 return;
2996 }
2997
2998 if (!ifmgd->associated ||
2999 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3000 return;
3001 bssid = ifmgd->associated->bssid;
3002
3003 /* Track average RSSI from the Beacon frames of the current AP */
3004 ifmgd->last_beacon_signal = rx_status->signal;
3005 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3006 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3007 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3008 ifmgd->last_cqm_event_signal = 0;
3009 ifmgd->count_beacon_signal = 1;
3010 ifmgd->last_ave_beacon_signal = 0;
3011 } else {
3012 ifmgd->ave_beacon_signal =
3013 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3014 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3015 ifmgd->ave_beacon_signal) / 16;
3016 ifmgd->count_beacon_signal++;
3017 }
3018
3019 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3020 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3021 int sig = ifmgd->ave_beacon_signal;
3022 int last_sig = ifmgd->last_ave_beacon_signal;
3023
3024 /*
3025 * if signal crosses either of the boundaries, invoke callback
3026 * with appropriate parameters
3027 */
3028 if (sig > ifmgd->rssi_max_thold &&
3029 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3030 ifmgd->last_ave_beacon_signal = sig;
3031 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3032 } else if (sig < ifmgd->rssi_min_thold &&
3033 (last_sig >= ifmgd->rssi_max_thold ||
3034 last_sig == 0)) {
3035 ifmgd->last_ave_beacon_signal = sig;
3036 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3037 }
3038 }
3039
3040 if (bss_conf->cqm_rssi_thold &&
3041 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3042 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3043 int sig = ifmgd->ave_beacon_signal / 16;
3044 int last_event = ifmgd->last_cqm_event_signal;
3045 int thold = bss_conf->cqm_rssi_thold;
3046 int hyst = bss_conf->cqm_rssi_hyst;
3047 if (sig < thold &&
3048 (last_event == 0 || sig < last_event - hyst)) {
3049 ifmgd->last_cqm_event_signal = sig;
3050 ieee80211_cqm_rssi_notify(
3051 &sdata->vif,
3052 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3053 GFP_KERNEL);
3054 } else if (sig > thold &&
3055 (last_event == 0 || sig > last_event + hyst)) {
3056 ifmgd->last_cqm_event_signal = sig;
3057 ieee80211_cqm_rssi_notify(
3058 &sdata->vif,
3059 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3060 GFP_KERNEL);
3061 }
3062 }
3063
3064 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3065 mlme_dbg_ratelimited(sdata,
3066 "cancelling AP probe due to a received beacon\n");
3067 mutex_lock(&local->mtx);
3068 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3069 ieee80211_run_deferred_scan(local);
3070 mutex_unlock(&local->mtx);
3071
3072 mutex_lock(&local->iflist_mtx);
3073 ieee80211_recalc_ps(local, -1);
3074 mutex_unlock(&local->iflist_mtx);
3075 }
3076
3077 /*
3078 * Push the beacon loss detection into the future since
3079 * we are processing a beacon from the AP just now.
3080 */
3081 ieee80211_sta_reset_beacon_monitor(sdata);
3082
3083 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3084 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3085 len - baselen, false, &elems,
3086 care_about_ies, ncrc);
3087
3088 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3089 bool directed_tim = ieee80211_check_tim(elems.tim,
3090 elems.tim_len,
3091 ifmgd->aid);
3092 if (directed_tim) {
3093 if (local->hw.conf.dynamic_ps_timeout > 0) {
3094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3096 ieee80211_hw_config(local,
3097 IEEE80211_CONF_CHANGE_PS);
3098 }
3099 ieee80211_send_nullfunc(local, sdata, 0);
3100 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3101 local->pspolling = true;
3102
3103 /*
3104 * Here is assumed that the driver will be
3105 * able to send ps-poll frame and receive a
3106 * response even though power save mode is
3107 * enabled, but some drivers might require
3108 * to disable power save here. This needs
3109 * to be investigated.
3110 */
3111 ieee80211_send_pspoll(local, sdata);
3112 }
3113 }
3114 }
3115
3116 if (sdata->vif.p2p) {
3117 struct ieee80211_p2p_noa_attr noa = {};
3118 int ret;
3119
3120 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3121 len - baselen,
3122 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3123 (u8 *) &noa, sizeof(noa));
3124 if (ret >= 2) {
3125 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3126 /* valid noa_attr and index changed */
3127 sdata->u.mgd.p2p_noa_index = noa.index;
3128 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3129 changed |= BSS_CHANGED_P2P_PS;
3130 /*
3131 * make sure we update all information, the CRC
3132 * mechanism doesn't look at P2P attributes.
3133 */
3134 ifmgd->beacon_crc_valid = false;
3135 }
3136 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3137 /* noa_attr not found and we had valid noa_attr before */
3138 sdata->u.mgd.p2p_noa_index = -1;
3139 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3140 changed |= BSS_CHANGED_P2P_PS;
3141 ifmgd->beacon_crc_valid = false;
3142 }
3143 }
3144
3145 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3146 return;
3147 ifmgd->beacon_crc = ncrc;
3148 ifmgd->beacon_crc_valid = true;
3149
3150 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3151
3152 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3153 &elems, true);
3154
3155 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3156 elems.wmm_param_len))
3157 changed |= BSS_CHANGED_QOS;
3158
3159 /*
3160 * If we haven't had a beacon before, tell the driver about the
3161 * DTIM period (and beacon timing if desired) now.
3162 */
3163 if (!ifmgd->have_beacon) {
3164 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3165 if (elems.tim)
3166 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3167 else
3168 bss_conf->dtim_period = 1;
3169
3170 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3171 sdata->vif.bss_conf.sync_tsf =
3172 le64_to_cpu(mgmt->u.beacon.timestamp);
3173 sdata->vif.bss_conf.sync_device_ts =
3174 rx_status->device_timestamp;
3175 if (elems.tim)
3176 sdata->vif.bss_conf.sync_dtim_count =
3177 elems.tim->dtim_count;
3178 else
3179 sdata->vif.bss_conf.sync_dtim_count = 0;
3180 }
3181
3182 changed |= BSS_CHANGED_BEACON_INFO;
3183 ifmgd->have_beacon = true;
3184
3185 mutex_lock(&local->iflist_mtx);
3186 ieee80211_recalc_ps(local, -1);
3187 mutex_unlock(&local->iflist_mtx);
3188
3189 ieee80211_recalc_ps_vif(sdata);
3190 }
3191
3192 if (elems.erp_info) {
3193 erp_valid = true;
3194 erp_value = elems.erp_info[0];
3195 } else {
3196 erp_valid = false;
3197 }
3198 changed |= ieee80211_handle_bss_capability(sdata,
3199 le16_to_cpu(mgmt->u.beacon.capab_info),
3200 erp_valid, erp_value);
3201
3202 mutex_lock(&local->sta_mtx);
3203 sta = sta_info_get(sdata, bssid);
3204
3205 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3206 elems.vht_operation, bssid, &changed)) {
3207 mutex_unlock(&local->sta_mtx);
3208 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3209 WLAN_REASON_DEAUTH_LEAVING,
3210 true, deauth_buf);
3211 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3212 sizeof(deauth_buf));
3213 return;
3214 }
3215
3216 if (sta && elems.opmode_notif)
3217 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3218 rx_status->band, true);
3219 mutex_unlock(&local->sta_mtx);
3220
3221 if (elems.country_elem && elems.pwr_constr_elem &&
3222 mgmt->u.probe_resp.capab_info &
3223 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3224 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3225 elems.country_elem,
3226 elems.country_elem_len,
3227 elems.pwr_constr_elem);
3228
3229 ieee80211_bss_info_change_notify(sdata, changed);
3230 }
3231
3232 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3233 struct sk_buff *skb)
3234 {
3235 struct ieee80211_rx_status *rx_status;
3236 struct ieee80211_mgmt *mgmt;
3237 u16 fc;
3238 struct ieee802_11_elems elems;
3239 int ies_len;
3240
3241 rx_status = (struct ieee80211_rx_status *) skb->cb;
3242 mgmt = (struct ieee80211_mgmt *) skb->data;
3243 fc = le16_to_cpu(mgmt->frame_control);
3244
3245 sdata_lock(sdata);
3246
3247 switch (fc & IEEE80211_FCTL_STYPE) {
3248 case IEEE80211_STYPE_BEACON:
3249 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3250 break;
3251 case IEEE80211_STYPE_PROBE_RESP:
3252 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3253 break;
3254 case IEEE80211_STYPE_AUTH:
3255 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3256 break;
3257 case IEEE80211_STYPE_DEAUTH:
3258 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3259 break;
3260 case IEEE80211_STYPE_DISASSOC:
3261 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3262 break;
3263 case IEEE80211_STYPE_ASSOC_RESP:
3264 case IEEE80211_STYPE_REASSOC_RESP:
3265 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3266 break;
3267 case IEEE80211_STYPE_ACTION:
3268 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3269 ies_len = skb->len -
3270 offsetof(struct ieee80211_mgmt,
3271 u.action.u.chan_switch.variable);
3272
3273 if (ies_len < 0)
3274 break;
3275
3276 ieee802_11_parse_elems(
3277 mgmt->u.action.u.chan_switch.variable,
3278 ies_len, true, &elems);
3279
3280 if (elems.parse_error)
3281 break;
3282
3283 ieee80211_sta_process_chanswitch(sdata,
3284 rx_status->mactime,
3285 &elems, false);
3286 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3287 ies_len = skb->len -
3288 offsetof(struct ieee80211_mgmt,
3289 u.action.u.ext_chan_switch.variable);
3290
3291 if (ies_len < 0)
3292 break;
3293
3294 ieee802_11_parse_elems(
3295 mgmt->u.action.u.ext_chan_switch.variable,
3296 ies_len, true, &elems);
3297
3298 if (elems.parse_error)
3299 break;
3300
3301 /* for the handling code pretend this was also an IE */
3302 elems.ext_chansw_ie =
3303 &mgmt->u.action.u.ext_chan_switch.data;
3304
3305 ieee80211_sta_process_chanswitch(sdata,
3306 rx_status->mactime,
3307 &elems, false);
3308 }
3309 break;
3310 }
3311 sdata_unlock(sdata);
3312 }
3313
3314 static void ieee80211_sta_timer(unsigned long data)
3315 {
3316 struct ieee80211_sub_if_data *sdata =
3317 (struct ieee80211_sub_if_data *) data;
3318
3319 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3320 }
3321
3322 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3323 u8 *bssid, u8 reason, bool tx)
3324 {
3325 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3326
3327 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3328 tx, frame_buf);
3329
3330 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3331 IEEE80211_DEAUTH_FRAME_LEN);
3332 }
3333
3334 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3335 {
3336 struct ieee80211_local *local = sdata->local;
3337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3338 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3339 u32 tx_flags = 0;
3340
3341 sdata_assert_lock(sdata);
3342
3343 if (WARN_ON_ONCE(!auth_data))
3344 return -EINVAL;
3345
3346 auth_data->tries++;
3347
3348 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3349 sdata_info(sdata, "authentication with %pM timed out\n",
3350 auth_data->bss->bssid);
3351
3352 /*
3353 * Most likely AP is not in the range so remove the
3354 * bss struct for that AP.
3355 */
3356 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3357
3358 return -ETIMEDOUT;
3359 }
3360
3361 drv_mgd_prepare_tx(local, sdata);
3362
3363 if (auth_data->bss->proberesp_ies) {
3364 u16 trans = 1;
3365 u16 status = 0;
3366
3367 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3368 auth_data->bss->bssid, auth_data->tries,
3369 IEEE80211_AUTH_MAX_TRIES);
3370
3371 auth_data->expected_transaction = 2;
3372
3373 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3374 trans = auth_data->sae_trans;
3375 status = auth_data->sae_status;
3376 auth_data->expected_transaction = trans;
3377 }
3378
3379 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3380 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3381 IEEE80211_TX_INTFL_MLME_CONN_TX;
3382
3383 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3384 auth_data->data, auth_data->data_len,
3385 auth_data->bss->bssid,
3386 auth_data->bss->bssid, NULL, 0, 0,
3387 tx_flags);
3388 } else {
3389 const u8 *ssidie;
3390
3391 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3392 auth_data->bss->bssid, auth_data->tries,
3393 IEEE80211_AUTH_MAX_TRIES);
3394
3395 rcu_read_lock();
3396 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3397 if (!ssidie) {
3398 rcu_read_unlock();
3399 return -EINVAL;
3400 }
3401 /*
3402 * Direct probe is sent to broadcast address as some APs
3403 * will not answer to direct packet in unassociated state.
3404 */
3405 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3406 NULL, 0, (u32) -1, true, 0,
3407 auth_data->bss->channel, false);
3408 rcu_read_unlock();
3409 }
3410
3411 if (tx_flags == 0) {
3412 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3413 auth_data->timeout_started = true;
3414 run_again(sdata, auth_data->timeout);
3415 } else {
3416 auth_data->timeout =
3417 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3418 auth_data->timeout_started = true;
3419 run_again(sdata, auth_data->timeout);
3420 }
3421
3422 return 0;
3423 }
3424
3425 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3426 {
3427 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3428 struct ieee80211_local *local = sdata->local;
3429
3430 sdata_assert_lock(sdata);
3431
3432 assoc_data->tries++;
3433 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3434 sdata_info(sdata, "association with %pM timed out\n",
3435 assoc_data->bss->bssid);
3436
3437 /*
3438 * Most likely AP is not in the range so remove the
3439 * bss struct for that AP.
3440 */
3441 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3442
3443 return -ETIMEDOUT;
3444 }
3445
3446 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3447 assoc_data->bss->bssid, assoc_data->tries,
3448 IEEE80211_ASSOC_MAX_TRIES);
3449 ieee80211_send_assoc(sdata);
3450
3451 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3452 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3453 assoc_data->timeout_started = true;
3454 run_again(sdata, assoc_data->timeout);
3455 } else {
3456 assoc_data->timeout =
3457 round_jiffies_up(jiffies +
3458 IEEE80211_ASSOC_TIMEOUT_LONG);
3459 assoc_data->timeout_started = true;
3460 run_again(sdata, assoc_data->timeout);
3461 }
3462
3463 return 0;
3464 }
3465
3466 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3467 __le16 fc, bool acked)
3468 {
3469 struct ieee80211_local *local = sdata->local;
3470
3471 sdata->u.mgd.status_fc = fc;
3472 sdata->u.mgd.status_acked = acked;
3473 sdata->u.mgd.status_received = true;
3474
3475 ieee80211_queue_work(&local->hw, &sdata->work);
3476 }
3477
3478 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3479 {
3480 struct ieee80211_local *local = sdata->local;
3481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3482
3483 sdata_lock(sdata);
3484
3485 if (ifmgd->status_received) {
3486 __le16 fc = ifmgd->status_fc;
3487 bool status_acked = ifmgd->status_acked;
3488
3489 ifmgd->status_received = false;
3490 if (ifmgd->auth_data &&
3491 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3492 if (status_acked) {
3493 ifmgd->auth_data->timeout =
3494 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3495 run_again(sdata, ifmgd->auth_data->timeout);
3496 } else {
3497 ifmgd->auth_data->timeout = jiffies - 1;
3498 }
3499 ifmgd->auth_data->timeout_started = true;
3500 } else if (ifmgd->assoc_data &&
3501 (ieee80211_is_assoc_req(fc) ||
3502 ieee80211_is_reassoc_req(fc))) {
3503 if (status_acked) {
3504 ifmgd->assoc_data->timeout =
3505 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3506 run_again(sdata, ifmgd->assoc_data->timeout);
3507 } else {
3508 ifmgd->assoc_data->timeout = jiffies - 1;
3509 }
3510 ifmgd->assoc_data->timeout_started = true;
3511 }
3512 }
3513
3514 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3515 time_after(jiffies, ifmgd->auth_data->timeout)) {
3516 if (ifmgd->auth_data->done) {
3517 /*
3518 * ok ... we waited for assoc but userspace didn't,
3519 * so let's just kill the auth data
3520 */
3521 ieee80211_destroy_auth_data(sdata, false);
3522 } else if (ieee80211_probe_auth(sdata)) {
3523 u8 bssid[ETH_ALEN];
3524
3525 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3526
3527 ieee80211_destroy_auth_data(sdata, false);
3528
3529 cfg80211_auth_timeout(sdata->dev, bssid);
3530 }
3531 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3532 run_again(sdata, ifmgd->auth_data->timeout);
3533
3534 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3535 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3536 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3537 ieee80211_do_assoc(sdata)) {
3538 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3539
3540 ieee80211_destroy_assoc_data(sdata, false);
3541 cfg80211_assoc_timeout(sdata->dev, bss);
3542 }
3543 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3544 run_again(sdata, ifmgd->assoc_data->timeout);
3545
3546 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3547 IEEE80211_STA_CONNECTION_POLL) &&
3548 ifmgd->associated) {
3549 u8 bssid[ETH_ALEN];
3550 int max_tries;
3551
3552 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3553
3554 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3555 max_tries = max_nullfunc_tries;
3556 else
3557 max_tries = max_probe_tries;
3558
3559 /* ACK received for nullfunc probing frame */
3560 if (!ifmgd->probe_send_count)
3561 ieee80211_reset_ap_probe(sdata);
3562 else if (ifmgd->nullfunc_failed) {
3563 if (ifmgd->probe_send_count < max_tries) {
3564 mlme_dbg(sdata,
3565 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3566 bssid, ifmgd->probe_send_count,
3567 max_tries);
3568 ieee80211_mgd_probe_ap_send(sdata);
3569 } else {
3570 mlme_dbg(sdata,
3571 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3572 bssid);
3573 ieee80211_sta_connection_lost(sdata, bssid,
3574 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3575 false);
3576 }
3577 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3578 run_again(sdata, ifmgd->probe_timeout);
3579 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3580 mlme_dbg(sdata,
3581 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3582 bssid, probe_wait_ms);
3583 ieee80211_sta_connection_lost(sdata, bssid,
3584 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3585 } else if (ifmgd->probe_send_count < max_tries) {
3586 mlme_dbg(sdata,
3587 "No probe response from AP %pM after %dms, try %d/%i\n",
3588 bssid, probe_wait_ms,
3589 ifmgd->probe_send_count, max_tries);
3590 ieee80211_mgd_probe_ap_send(sdata);
3591 } else {
3592 /*
3593 * We actually lost the connection ... or did we?
3594 * Let's make sure!
3595 */
3596 wiphy_debug(local->hw.wiphy,
3597 "%s: No probe response from AP %pM"
3598 " after %dms, disconnecting.\n",
3599 sdata->name,
3600 bssid, probe_wait_ms);
3601
3602 ieee80211_sta_connection_lost(sdata, bssid,
3603 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3604 }
3605 }
3606
3607 sdata_unlock(sdata);
3608 }
3609
3610 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3611 {
3612 struct ieee80211_sub_if_data *sdata =
3613 (struct ieee80211_sub_if_data *) data;
3614 struct ieee80211_local *local = sdata->local;
3615
3616 if (local->quiescing)
3617 return;
3618
3619 sdata->u.mgd.connection_loss = false;
3620 ieee80211_queue_work(&sdata->local->hw,
3621 &sdata->u.mgd.beacon_connection_loss_work);
3622 }
3623
3624 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3625 {
3626 struct ieee80211_sub_if_data *sdata =
3627 (struct ieee80211_sub_if_data *) data;
3628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3629 struct ieee80211_local *local = sdata->local;
3630
3631 if (local->quiescing)
3632 return;
3633
3634 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3635 }
3636
3637 static void ieee80211_sta_monitor_work(struct work_struct *work)
3638 {
3639 struct ieee80211_sub_if_data *sdata =
3640 container_of(work, struct ieee80211_sub_if_data,
3641 u.mgd.monitor_work);
3642
3643 ieee80211_mgd_probe_ap(sdata, false);
3644 }
3645
3646 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3647 {
3648 u32 flags;
3649
3650 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3651 __ieee80211_stop_poll(sdata);
3652
3653 /* let's probe the connection once */
3654 flags = sdata->local->hw.flags;
3655 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3656 ieee80211_queue_work(&sdata->local->hw,
3657 &sdata->u.mgd.monitor_work);
3658 /* and do all the other regular work too */
3659 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3660 }
3661 }
3662
3663 #ifdef CONFIG_PM
3664 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3665 {
3666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3667
3668 sdata_lock(sdata);
3669 if (!ifmgd->associated) {
3670 sdata_unlock(sdata);
3671 return;
3672 }
3673
3674 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3675 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3676 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3677 ieee80211_sta_connection_lost(sdata,
3678 ifmgd->associated->bssid,
3679 WLAN_REASON_UNSPECIFIED,
3680 true);
3681 sdata_unlock(sdata);
3682 return;
3683 }
3684 sdata_unlock(sdata);
3685 }
3686 #endif
3687
3688 /* interface setup */
3689 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3690 {
3691 struct ieee80211_if_managed *ifmgd;
3692
3693 ifmgd = &sdata->u.mgd;
3694 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3695 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3696 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3697 ieee80211_beacon_connection_loss_work);
3698 INIT_WORK(&ifmgd->csa_connection_drop_work,
3699 ieee80211_csa_connection_drop_work);
3700 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3701 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3702 (unsigned long) sdata);
3703 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3704 (unsigned long) sdata);
3705 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3706 (unsigned long) sdata);
3707 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3708 (unsigned long) sdata);
3709
3710 ifmgd->flags = 0;
3711 ifmgd->powersave = sdata->wdev.ps;
3712 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3713 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3714 ifmgd->p2p_noa_index = -1;
3715
3716 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3717 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3718 else
3719 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3720 }
3721
3722 /* scan finished notification */
3723 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3724 {
3725 struct ieee80211_sub_if_data *sdata;
3726
3727 /* Restart STA timers */
3728 rcu_read_lock();
3729 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3730 if (ieee80211_sdata_running(sdata))
3731 ieee80211_restart_sta_timer(sdata);
3732 }
3733 rcu_read_unlock();
3734 }
3735
3736 int ieee80211_max_network_latency(struct notifier_block *nb,
3737 unsigned long data, void *dummy)
3738 {
3739 s32 latency_usec = (s32) data;
3740 struct ieee80211_local *local =
3741 container_of(nb, struct ieee80211_local,
3742 network_latency_notifier);
3743
3744 mutex_lock(&local->iflist_mtx);
3745 ieee80211_recalc_ps(local, latency_usec);
3746 mutex_unlock(&local->iflist_mtx);
3747
3748 return 0;
3749 }
3750
3751 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3752 struct cfg80211_bss *cbss)
3753 {
3754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3755 const u8 *ht_cap_ie, *vht_cap_ie;
3756 const struct ieee80211_ht_cap *ht_cap;
3757 const struct ieee80211_vht_cap *vht_cap;
3758 u8 chains = 1;
3759
3760 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3761 return chains;
3762
3763 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3764 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3765 ht_cap = (void *)(ht_cap_ie + 2);
3766 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3767 /*
3768 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3769 * "Tx Unequal Modulation Supported" fields.
3770 */
3771 }
3772
3773 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3774 return chains;
3775
3776 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3777 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3778 u8 nss;
3779 u16 tx_mcs_map;
3780
3781 vht_cap = (void *)(vht_cap_ie + 2);
3782 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3783 for (nss = 8; nss > 0; nss--) {
3784 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3785 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3786 break;
3787 }
3788 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3789 chains = max(chains, nss);
3790 }
3791
3792 return chains;
3793 }
3794
3795 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3796 struct cfg80211_bss *cbss)
3797 {
3798 struct ieee80211_local *local = sdata->local;
3799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3800 const struct ieee80211_ht_operation *ht_oper = NULL;
3801 const struct ieee80211_vht_operation *vht_oper = NULL;
3802 struct ieee80211_supported_band *sband;
3803 struct cfg80211_chan_def chandef;
3804 int ret;
3805
3806 sband = local->hw.wiphy->bands[cbss->channel->band];
3807
3808 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3809 IEEE80211_STA_DISABLE_80P80MHZ |
3810 IEEE80211_STA_DISABLE_160MHZ);
3811
3812 rcu_read_lock();
3813
3814 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3815 sband->ht_cap.ht_supported) {
3816 const u8 *ht_oper_ie, *ht_cap;
3817
3818 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3819 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3820 ht_oper = (void *)(ht_oper_ie + 2);
3821
3822 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3823 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3824 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3825 ht_oper = NULL;
3826 }
3827 }
3828
3829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3830 sband->vht_cap.vht_supported) {
3831 const u8 *vht_oper_ie, *vht_cap;
3832
3833 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3834 WLAN_EID_VHT_OPERATION);
3835 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3836 vht_oper = (void *)(vht_oper_ie + 2);
3837 if (vht_oper && !ht_oper) {
3838 vht_oper = NULL;
3839 sdata_info(sdata,
3840 "AP advertised VHT without HT, disabling both\n");
3841 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3842 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3843 }
3844
3845 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3846 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3847 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3848 vht_oper = NULL;
3849 }
3850 }
3851
3852 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3853 cbss->channel,
3854 ht_oper, vht_oper,
3855 &chandef, false);
3856
3857 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3858 local->rx_chains);
3859
3860 rcu_read_unlock();
3861
3862 /* will change later if needed */
3863 sdata->smps_mode = IEEE80211_SMPS_OFF;
3864
3865 /*
3866 * If this fails (possibly due to channel context sharing
3867 * on incompatible channels, e.g. 80+80 and 160 sharing the
3868 * same control channel) try to use a smaller bandwidth.
3869 */
3870 ret = ieee80211_vif_use_channel(sdata, &chandef,
3871 IEEE80211_CHANCTX_SHARED);
3872
3873 /* don't downgrade for 5 and 10 MHz channels, though. */
3874 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3875 chandef.width == NL80211_CHAN_WIDTH_10)
3876 return ret;
3877
3878 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3879 ifmgd->flags |= chandef_downgrade(&chandef);
3880 ret = ieee80211_vif_use_channel(sdata, &chandef,
3881 IEEE80211_CHANCTX_SHARED);
3882 }
3883 return ret;
3884 }
3885
3886 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3887 struct cfg80211_bss *cbss, bool assoc)
3888 {
3889 struct ieee80211_local *local = sdata->local;
3890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3891 struct ieee80211_bss *bss = (void *)cbss->priv;
3892 struct sta_info *new_sta = NULL;
3893 bool have_sta = false;
3894 int err;
3895
3896 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3897 return -EINVAL;
3898
3899 if (assoc) {
3900 rcu_read_lock();
3901 have_sta = sta_info_get(sdata, cbss->bssid);
3902 rcu_read_unlock();
3903 }
3904
3905 if (!have_sta) {
3906 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3907 if (!new_sta)
3908 return -ENOMEM;
3909 }
3910 if (new_sta) {
3911 u32 rates = 0, basic_rates = 0;
3912 bool have_higher_than_11mbit;
3913 int min_rate = INT_MAX, min_rate_index = -1;
3914 struct ieee80211_chanctx_conf *chanctx_conf;
3915 struct ieee80211_supported_band *sband;
3916 const struct cfg80211_bss_ies *ies;
3917 int shift;
3918 u32 rate_flags;
3919
3920 sband = local->hw.wiphy->bands[cbss->channel->band];
3921
3922 err = ieee80211_prep_channel(sdata, cbss);
3923 if (err) {
3924 sta_info_free(local, new_sta);
3925 return -EINVAL;
3926 }
3927 shift = ieee80211_vif_get_shift(&sdata->vif);
3928
3929 rcu_read_lock();
3930 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3931 if (WARN_ON(!chanctx_conf)) {
3932 rcu_read_unlock();
3933 return -EINVAL;
3934 }
3935 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3936 rcu_read_unlock();
3937
3938 ieee80211_get_rates(sband, bss->supp_rates,
3939 bss->supp_rates_len,
3940 &rates, &basic_rates,
3941 &have_higher_than_11mbit,
3942 &min_rate, &min_rate_index,
3943 shift, rate_flags);
3944
3945 /*
3946 * This used to be a workaround for basic rates missing
3947 * in the association response frame. Now that we no
3948 * longer use the basic rates from there, it probably
3949 * doesn't happen any more, but keep the workaround so
3950 * in case some *other* APs are buggy in different ways
3951 * we can connect -- with a warning.
3952 */
3953 if (!basic_rates && min_rate_index >= 0) {
3954 sdata_info(sdata,
3955 "No basic rates, using min rate instead\n");
3956 basic_rates = BIT(min_rate_index);
3957 }
3958
3959 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3960 sdata->vif.bss_conf.basic_rates = basic_rates;
3961
3962 /* cf. IEEE 802.11 9.2.12 */
3963 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3964 have_higher_than_11mbit)
3965 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3966 else
3967 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3968
3969 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3970
3971 /* set timing information */
3972 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3973 rcu_read_lock();
3974 ies = rcu_dereference(cbss->beacon_ies);
3975 if (ies) {
3976 const u8 *tim_ie;
3977
3978 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3979 sdata->vif.bss_conf.sync_device_ts =
3980 bss->device_ts_beacon;
3981 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3982 ies->data, ies->len);
3983 if (tim_ie && tim_ie[1] >= 2)
3984 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3985 else
3986 sdata->vif.bss_conf.sync_dtim_count = 0;
3987 } else if (!(local->hw.flags &
3988 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3989 ies = rcu_dereference(cbss->proberesp_ies);
3990 /* must be non-NULL since beacon IEs were NULL */
3991 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3992 sdata->vif.bss_conf.sync_device_ts =
3993 bss->device_ts_presp;
3994 sdata->vif.bss_conf.sync_dtim_count = 0;
3995 } else {
3996 sdata->vif.bss_conf.sync_tsf = 0;
3997 sdata->vif.bss_conf.sync_device_ts = 0;
3998 sdata->vif.bss_conf.sync_dtim_count = 0;
3999 }
4000 rcu_read_unlock();
4001
4002 /* tell driver about BSSID, basic rates and timing */
4003 ieee80211_bss_info_change_notify(sdata,
4004 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4005 BSS_CHANGED_BEACON_INT);
4006
4007 if (assoc)
4008 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4009
4010 err = sta_info_insert(new_sta);
4011 new_sta = NULL;
4012 if (err) {
4013 sdata_info(sdata,
4014 "failed to insert STA entry for the AP (error %d)\n",
4015 err);
4016 return err;
4017 }
4018 } else
4019 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4020
4021 return 0;
4022 }
4023
4024 /* config hooks */
4025 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4026 struct cfg80211_auth_request *req)
4027 {
4028 struct ieee80211_local *local = sdata->local;
4029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4030 struct ieee80211_mgd_auth_data *auth_data;
4031 u16 auth_alg;
4032 int err;
4033
4034 /* prepare auth data structure */
4035
4036 switch (req->auth_type) {
4037 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4038 auth_alg = WLAN_AUTH_OPEN;
4039 break;
4040 case NL80211_AUTHTYPE_SHARED_KEY:
4041 if (IS_ERR(local->wep_tx_tfm))
4042 return -EOPNOTSUPP;
4043 auth_alg = WLAN_AUTH_SHARED_KEY;
4044 break;
4045 case NL80211_AUTHTYPE_FT:
4046 auth_alg = WLAN_AUTH_FT;
4047 break;
4048 case NL80211_AUTHTYPE_NETWORK_EAP:
4049 auth_alg = WLAN_AUTH_LEAP;
4050 break;
4051 case NL80211_AUTHTYPE_SAE:
4052 auth_alg = WLAN_AUTH_SAE;
4053 break;
4054 default:
4055 return -EOPNOTSUPP;
4056 }
4057
4058 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4059 req->ie_len, GFP_KERNEL);
4060 if (!auth_data)
4061 return -ENOMEM;
4062
4063 auth_data->bss = req->bss;
4064
4065 if (req->sae_data_len >= 4) {
4066 __le16 *pos = (__le16 *) req->sae_data;
4067 auth_data->sae_trans = le16_to_cpu(pos[0]);
4068 auth_data->sae_status = le16_to_cpu(pos[1]);
4069 memcpy(auth_data->data, req->sae_data + 4,
4070 req->sae_data_len - 4);
4071 auth_data->data_len += req->sae_data_len - 4;
4072 }
4073
4074 if (req->ie && req->ie_len) {
4075 memcpy(&auth_data->data[auth_data->data_len],
4076 req->ie, req->ie_len);
4077 auth_data->data_len += req->ie_len;
4078 }
4079
4080 if (req->key && req->key_len) {
4081 auth_data->key_len = req->key_len;
4082 auth_data->key_idx = req->key_idx;
4083 memcpy(auth_data->key, req->key, req->key_len);
4084 }
4085
4086 auth_data->algorithm = auth_alg;
4087
4088 /* try to authenticate/probe */
4089
4090 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4091 ifmgd->assoc_data) {
4092 err = -EBUSY;
4093 goto err_free;
4094 }
4095
4096 if (ifmgd->auth_data)
4097 ieee80211_destroy_auth_data(sdata, false);
4098
4099 /* prep auth_data so we don't go into idle on disassoc */
4100 ifmgd->auth_data = auth_data;
4101
4102 if (ifmgd->associated) {
4103 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4104
4105 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4106 WLAN_REASON_UNSPECIFIED,
4107 false, frame_buf);
4108
4109 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4110 sizeof(frame_buf));
4111 }
4112
4113 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4114
4115 err = ieee80211_prep_connection(sdata, req->bss, false);
4116 if (err)
4117 goto err_clear;
4118
4119 err = ieee80211_probe_auth(sdata);
4120 if (err) {
4121 sta_info_destroy_addr(sdata, req->bss->bssid);
4122 goto err_clear;
4123 }
4124
4125 /* hold our own reference */
4126 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4127 return 0;
4128
4129 err_clear:
4130 memset(ifmgd->bssid, 0, ETH_ALEN);
4131 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4132 ifmgd->auth_data = NULL;
4133 err_free:
4134 kfree(auth_data);
4135 return err;
4136 }
4137
4138 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4139 struct cfg80211_assoc_request *req)
4140 {
4141 struct ieee80211_local *local = sdata->local;
4142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4143 struct ieee80211_bss *bss = (void *)req->bss->priv;
4144 struct ieee80211_mgd_assoc_data *assoc_data;
4145 const struct cfg80211_bss_ies *beacon_ies;
4146 struct ieee80211_supported_band *sband;
4147 const u8 *ssidie, *ht_ie, *vht_ie;
4148 int i, err;
4149
4150 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4151 if (!assoc_data)
4152 return -ENOMEM;
4153
4154 rcu_read_lock();
4155 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4156 if (!ssidie) {
4157 rcu_read_unlock();
4158 kfree(assoc_data);
4159 return -EINVAL;
4160 }
4161 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4162 assoc_data->ssid_len = ssidie[1];
4163 rcu_read_unlock();
4164
4165 if (ifmgd->associated) {
4166 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4167
4168 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4169 WLAN_REASON_UNSPECIFIED,
4170 false, frame_buf);
4171
4172 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4173 sizeof(frame_buf));
4174 }
4175
4176 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4177 err = -EBUSY;
4178 goto err_free;
4179 }
4180
4181 if (ifmgd->assoc_data) {
4182 err = -EBUSY;
4183 goto err_free;
4184 }
4185
4186 if (ifmgd->auth_data) {
4187 bool match;
4188
4189 /* keep sta info, bssid if matching */
4190 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4191 ieee80211_destroy_auth_data(sdata, match);
4192 }
4193
4194 /* prepare assoc data */
4195
4196 ifmgd->beacon_crc_valid = false;
4197
4198 /*
4199 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4200 * We still associate in non-HT mode (11a/b/g) if any one of these
4201 * ciphers is configured as pairwise.
4202 * We can set this to true for non-11n hardware, that'll be checked
4203 * separately along with the peer capabilities.
4204 */
4205 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4206 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4207 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4208 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4209 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4210 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4211 netdev_info(sdata->dev,
4212 "disabling HT/VHT due to WEP/TKIP use\n");
4213 }
4214 }
4215
4216 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4217 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4218 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4219 }
4220
4221 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4222 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4223
4224 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4225 sband = local->hw.wiphy->bands[req->bss->channel->band];
4226 if (!sband->ht_cap.ht_supported ||
4227 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4228 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4229 if (!bss->wmm_used)
4230 netdev_info(sdata->dev,
4231 "disabling HT as WMM/QoS is not supported by the AP\n");
4232 }
4233
4234 /* disable VHT if we don't support it or the AP doesn't use WMM */
4235 if (!sband->vht_cap.vht_supported ||
4236 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4237 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4238 if (!bss->wmm_used)
4239 netdev_info(sdata->dev,
4240 "disabling VHT as WMM/QoS is not supported by the AP\n");
4241 }
4242
4243 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4244 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4245 sizeof(ifmgd->ht_capa_mask));
4246
4247 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4248 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4249 sizeof(ifmgd->vht_capa_mask));
4250
4251 if (req->ie && req->ie_len) {
4252 memcpy(assoc_data->ie, req->ie, req->ie_len);
4253 assoc_data->ie_len = req->ie_len;
4254 }
4255
4256 assoc_data->bss = req->bss;
4257
4258 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4259 if (ifmgd->powersave)
4260 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4261 else
4262 sdata->smps_mode = IEEE80211_SMPS_OFF;
4263 } else
4264 sdata->smps_mode = ifmgd->req_smps;
4265
4266 assoc_data->capability = req->bss->capability;
4267 assoc_data->wmm = bss->wmm_used &&
4268 (local->hw.queues >= IEEE80211_NUM_ACS);
4269 assoc_data->supp_rates = bss->supp_rates;
4270 assoc_data->supp_rates_len = bss->supp_rates_len;
4271
4272 rcu_read_lock();
4273 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4274 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4275 assoc_data->ap_ht_param =
4276 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4277 else
4278 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4279 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4280 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4281 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4282 sizeof(struct ieee80211_vht_cap));
4283 else
4284 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4285 rcu_read_unlock();
4286
4287 if (bss->wmm_used && bss->uapsd_supported &&
4288 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4289 sdata->wmm_acm != 0xff) {
4290 assoc_data->uapsd = true;
4291 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4292 } else {
4293 assoc_data->uapsd = false;
4294 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4295 }
4296
4297 if (req->prev_bssid)
4298 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4299
4300 if (req->use_mfp) {
4301 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4302 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4303 } else {
4304 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4305 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4306 }
4307
4308 if (req->crypto.control_port)
4309 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4310 else
4311 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4312
4313 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4314 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4315
4316 /* kick off associate process */
4317
4318 ifmgd->assoc_data = assoc_data;
4319 ifmgd->dtim_period = 0;
4320 ifmgd->have_beacon = false;
4321
4322 err = ieee80211_prep_connection(sdata, req->bss, true);
4323 if (err)
4324 goto err_clear;
4325
4326 rcu_read_lock();
4327 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4328
4329 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4330 !beacon_ies) {
4331 /*
4332 * Wait up to one beacon interval ...
4333 * should this be more if we miss one?
4334 */
4335 sdata_info(sdata, "waiting for beacon from %pM\n",
4336 ifmgd->bssid);
4337 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4338 assoc_data->timeout_started = true;
4339 assoc_data->need_beacon = true;
4340 } else if (beacon_ies) {
4341 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4342 beacon_ies->data,
4343 beacon_ies->len);
4344 u8 dtim_count = 0;
4345
4346 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4347 const struct ieee80211_tim_ie *tim;
4348 tim = (void *)(tim_ie + 2);
4349 ifmgd->dtim_period = tim->dtim_period;
4350 dtim_count = tim->dtim_count;
4351 }
4352 ifmgd->have_beacon = true;
4353 assoc_data->timeout = jiffies;
4354 assoc_data->timeout_started = true;
4355
4356 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4357 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4358 sdata->vif.bss_conf.sync_device_ts =
4359 bss->device_ts_beacon;
4360 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4361 }
4362 } else {
4363 assoc_data->timeout = jiffies;
4364 assoc_data->timeout_started = true;
4365 }
4366 rcu_read_unlock();
4367
4368 run_again(sdata, assoc_data->timeout);
4369
4370 if (bss->corrupt_data) {
4371 char *corrupt_type = "data";
4372 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4373 if (bss->corrupt_data &
4374 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4375 corrupt_type = "beacon and probe response";
4376 else
4377 corrupt_type = "beacon";
4378 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4379 corrupt_type = "probe response";
4380 sdata_info(sdata, "associating with AP with corrupt %s\n",
4381 corrupt_type);
4382 }
4383
4384 return 0;
4385 err_clear:
4386 memset(ifmgd->bssid, 0, ETH_ALEN);
4387 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4388 ifmgd->assoc_data = NULL;
4389 err_free:
4390 kfree(assoc_data);
4391 return err;
4392 }
4393
4394 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4395 struct cfg80211_deauth_request *req)
4396 {
4397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4398 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4399 bool tx = !req->local_state_change;
4400 bool report_frame = false;
4401
4402 sdata_info(sdata,
4403 "deauthenticating from %pM by local choice (reason=%d)\n",
4404 req->bssid, req->reason_code);
4405
4406 if (ifmgd->auth_data) {
4407 drv_mgd_prepare_tx(sdata->local, sdata);
4408 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4409 IEEE80211_STYPE_DEAUTH,
4410 req->reason_code, tx,
4411 frame_buf);
4412 ieee80211_destroy_auth_data(sdata, false);
4413
4414 report_frame = true;
4415 goto out;
4416 }
4417
4418 if (ifmgd->associated &&
4419 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4420 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4421 req->reason_code, tx, frame_buf);
4422 report_frame = true;
4423 }
4424
4425 out:
4426 if (report_frame)
4427 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4428 IEEE80211_DEAUTH_FRAME_LEN);
4429
4430 return 0;
4431 }
4432
4433 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4434 struct cfg80211_disassoc_request *req)
4435 {
4436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4437 u8 bssid[ETH_ALEN];
4438 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4439
4440 /*
4441 * cfg80211 should catch this ... but it's racy since
4442 * we can receive a disassoc frame, process it, hand it
4443 * to cfg80211 while that's in a locked section already
4444 * trying to tell us that the user wants to disconnect.
4445 */
4446 if (ifmgd->associated != req->bss)
4447 return -ENOLINK;
4448
4449 sdata_info(sdata,
4450 "disassociating from %pM by local choice (reason=%d)\n",
4451 req->bss->bssid, req->reason_code);
4452
4453 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4454 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4455 req->reason_code, !req->local_state_change,
4456 frame_buf);
4457
4458 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4459 IEEE80211_DEAUTH_FRAME_LEN);
4460
4461 return 0;
4462 }
4463
4464 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4465 {
4466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4467
4468 /*
4469 * Make sure some work items will not run after this,
4470 * they will not do anything but might not have been
4471 * cancelled when disconnecting.
4472 */
4473 cancel_work_sync(&ifmgd->monitor_work);
4474 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4475 cancel_work_sync(&ifmgd->request_smps_work);
4476 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4477 cancel_work_sync(&ifmgd->chswitch_work);
4478
4479 sdata_lock(sdata);
4480 if (ifmgd->assoc_data) {
4481 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4482 ieee80211_destroy_assoc_data(sdata, false);
4483 cfg80211_assoc_timeout(sdata->dev, bss);
4484 }
4485 if (ifmgd->auth_data)
4486 ieee80211_destroy_auth_data(sdata, false);
4487 del_timer_sync(&ifmgd->timer);
4488 sdata_unlock(sdata);
4489 }
4490
4491 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4492 enum nl80211_cqm_rssi_threshold_event rssi_event,
4493 gfp_t gfp)
4494 {
4495 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4496
4497 trace_api_cqm_rssi_notify(sdata, rssi_event);
4498
4499 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4500 }
4501 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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