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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
50
51 /*
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
58 */
59 static int beacon_loss_count = 7;
60 module_param(beacon_loss_count, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
63
64 /*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
69 /*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
74 static int probe_wait_ms = 500;
75 module_param(probe_wait_ms, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
79
80 /*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
87 /*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
92
93 /*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99 enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
120 };
121
122 /* utils */
123 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124 {
125 lockdep_assert_held(&ifmgd->mtx);
126 }
127
128 /*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
138 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
139 {
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145 }
146
147 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
148 {
149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
150 return;
151
152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
157 }
158
159 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160 {
161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
171
172 ifmgd->probe_send_count = 0;
173 }
174
175 static int ecw2cw(int ecw)
176 {
177 return (1 << ecw) - 1;
178 }
179
180 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181 {
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232 }
233
234 static u32
235 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
240 struct cfg80211_chan_def *chandef, bool verbose)
241 {
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
292 /* also mark 40 MHz disabled */
293 ret |= IEEE80211_STA_DISABLE_40MHZ;
294 goto out;
295 }
296
297 if (!vht_oper || !sband->vht_cap.vht_supported) {
298 ret = IEEE80211_STA_DISABLE_VHT;
299 goto out;
300 }
301
302 vht_chandef.chan = channel;
303 vht_chandef.center_freq1 =
304 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
305 channel->band);
306 vht_chandef.center_freq2 = 0;
307
308 switch (vht_oper->chan_width) {
309 case IEEE80211_VHT_CHANWIDTH_USE_HT:
310 vht_chandef.width = chandef->width;
311 break;
312 case IEEE80211_VHT_CHANWIDTH_80MHZ:
313 vht_chandef.width = NL80211_CHAN_WIDTH_80;
314 break;
315 case IEEE80211_VHT_CHANWIDTH_160MHZ:
316 vht_chandef.width = NL80211_CHAN_WIDTH_160;
317 break;
318 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
319 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
320 vht_chandef.center_freq2 =
321 ieee80211_channel_to_frequency(
322 vht_oper->center_freq_seg2_idx,
323 channel->band);
324 break;
325 default:
326 if (verbose)
327 sdata_info(sdata,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
330 ret = IEEE80211_STA_DISABLE_VHT;
331 goto out;
332 }
333
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
335 if (verbose)
336 sdata_info(sdata,
337 "AP VHT information is invalid, disable VHT\n");
338 ret = IEEE80211_STA_DISABLE_VHT;
339 goto out;
340 }
341
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
343 ret = 0;
344 goto out;
345 }
346
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
348 if (verbose)
349 sdata_info(sdata,
350 "AP VHT information doesn't match HT, disable VHT\n");
351 ret = IEEE80211_STA_DISABLE_VHT;
352 goto out;
353 }
354
355 *chandef = vht_chandef;
356
357 ret = 0;
358
359 out:
360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
363
364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
369 goto out;
370 }
371
372 ret |= chandef_downgrade(chandef);
373 }
374
375 if (chandef->width != vht_chandef.width && verbose)
376 sdata_info(sdata,
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
378
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
380 return ret;
381 }
382
383 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
388 {
389 struct ieee80211_local *local = sdata->local;
390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
391 struct ieee80211_supported_band *sband;
392 struct ieee80211_channel *chan;
393 struct cfg80211_chan_def chandef;
394 u16 ht_opmode;
395 u32 flags;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
397 int ret;
398
399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
401 return 0;
402
403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
405 vht_oper = NULL;
406
407 if (WARN_ON_ONCE(!sta))
408 return -EINVAL;
409
410 chan = sdata->vif.bss_conf.chandef.chan;
411 sband = local->hw.wiphy->bands[chan->band];
412
413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
416
417 /*
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
423 */
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
433
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
435 return 0;
436
437 sdata_info(sdata,
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
441
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
450 ifmgd->bssid);
451 return -EINVAL;
452 }
453
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 break;
459 case NL80211_CHAN_WIDTH_40:
460 new_sta_bw = IEEE80211_STA_RX_BW_40;
461 break;
462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 break;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
468 break;
469 default:
470 return -EINVAL;
471 }
472
473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
475
476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
480 }
481
482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 if (ret) {
484 sdata_info(sdata,
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
486 ifmgd->bssid);
487 return ret;
488 }
489
490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
494 }
495
496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
497
498 /* if bss configuration changed store the new one */
499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
502 }
503
504 return 0;
505 }
506
507 /* frame sending functions */
508
509 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
511 u32 *rates)
512 {
513 int i, j, count;
514 *rates = 0;
515 count = 0;
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
518
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
521 *rates |= BIT(j);
522 count++;
523 break;
524 }
525 }
526
527 return count;
528 }
529
530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
531 struct sk_buff *skb, u8 ap_ht_param,
532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
535 {
536 u8 *pos;
537 u32 flags = channel->flags;
538 u16 cap;
539 struct ieee80211_sta_ht_cap ht_cap;
540
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
542
543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
545
546 /* determine capability flags */
547 cap = ht_cap.cap;
548
549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
554 }
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
560 }
561 break;
562 }
563
564 /*
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
568 */
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
572 }
573
574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
576 switch (smps) {
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
579 WARN_ON(1);
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
583 break;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
587 break;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
591 break;
592 }
593
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
597 }
598
599 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
600 struct sk_buff *skb,
601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
603 {
604 u8 *pos;
605 u32 cap;
606 struct ieee80211_sta_vht_cap vht_cap;
607
608 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
609
610 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
611 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
612
613 /* determine capability flags */
614 cap = vht_cap.cap;
615
616 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
617 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
618 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
619 }
620
621 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
622 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
623 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
624 }
625
626 /*
627 * Some APs apparently get confused if our capabilities are better
628 * than theirs, so restrict what we advertise in the assoc request.
629 */
630 if (!(ap_vht_cap->vht_cap_info &
631 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
632 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
633
634 /* reserve and fill IE */
635 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
636 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
637 }
638
639 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
640 {
641 struct ieee80211_local *local = sdata->local;
642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
643 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
644 struct sk_buff *skb;
645 struct ieee80211_mgmt *mgmt;
646 u8 *pos, qos_info;
647 size_t offset = 0, noffset;
648 int i, count, rates_len, supp_rates_len;
649 u16 capab;
650 struct ieee80211_supported_band *sband;
651 struct ieee80211_chanctx_conf *chanctx_conf;
652 struct ieee80211_channel *chan;
653 u32 rates = 0;
654
655 lockdep_assert_held(&ifmgd->mtx);
656
657 rcu_read_lock();
658 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
659 if (WARN_ON(!chanctx_conf)) {
660 rcu_read_unlock();
661 return;
662 }
663 chan = chanctx_conf->def.chan;
664 rcu_read_unlock();
665 sband = local->hw.wiphy->bands[chan->band];
666
667 if (assoc_data->supp_rates_len) {
668 /*
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
672 * b-only mode)...
673 */
674 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
675 assoc_data->supp_rates_len,
676 sband, &rates);
677 } else {
678 /*
679 * In case AP not provide any supported rates information
680 * before association, we send information element(s) with
681 * all rates that we support.
682 */
683 rates = ~0;
684 rates_len = sband->n_bitrates;
685 }
686
687 skb = alloc_skb(local->hw.extra_tx_headroom +
688 sizeof(*mgmt) + /* bit too much but doesn't matter */
689 2 + assoc_data->ssid_len + /* SSID */
690 4 + rates_len + /* (extended) rates */
691 4 + /* power capability */
692 2 + 2 * sband->n_channels + /* supported channels */
693 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
694 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
695 assoc_data->ie_len + /* extra IEs */
696 9, /* WMM */
697 GFP_KERNEL);
698 if (!skb)
699 return;
700
701 skb_reserve(skb, local->hw.extra_tx_headroom);
702
703 capab = WLAN_CAPABILITY_ESS;
704
705 if (sband->band == IEEE80211_BAND_2GHZ) {
706 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
707 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
708 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
709 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
710 }
711
712 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
713 capab |= WLAN_CAPABILITY_PRIVACY;
714
715 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
716 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
717 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
718
719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
720 memset(mgmt, 0, 24);
721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
724
725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
726 skb_put(skb, 10);
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_REASSOC_REQ);
729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
730 mgmt->u.reassoc_req.listen_interval =
731 cpu_to_le16(local->hw.conf.listen_interval);
732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
733 ETH_ALEN);
734 } else {
735 skb_put(skb, 4);
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_ASSOC_REQ);
738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
739 mgmt->u.assoc_req.listen_interval =
740 cpu_to_le16(local->hw.conf.listen_interval);
741 }
742
743 /* SSID */
744 pos = skb_put(skb, 2 + assoc_data->ssid_len);
745 *pos++ = WLAN_EID_SSID;
746 *pos++ = assoc_data->ssid_len;
747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
748
749 /* add all rates which were marked to be used above */
750 supp_rates_len = rates_len;
751 if (supp_rates_len > 8)
752 supp_rates_len = 8;
753
754 pos = skb_put(skb, supp_rates_len + 2);
755 *pos++ = WLAN_EID_SUPP_RATES;
756 *pos++ = supp_rates_len;
757
758 count = 0;
759 for (i = 0; i < sband->n_bitrates; i++) {
760 if (BIT(i) & rates) {
761 int rate = sband->bitrates[i].bitrate;
762 *pos++ = (u8) (rate / 5);
763 if (++count == 8)
764 break;
765 }
766 }
767
768 if (rates_len > count) {
769 pos = skb_put(skb, rates_len - count + 2);
770 *pos++ = WLAN_EID_EXT_SUPP_RATES;
771 *pos++ = rates_len - count;
772
773 for (i++; i < sband->n_bitrates; i++) {
774 if (BIT(i) & rates) {
775 int rate = sband->bitrates[i].bitrate;
776 *pos++ = (u8) (rate / 5);
777 }
778 }
779 }
780
781 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
782 /* 1. power capabilities */
783 pos = skb_put(skb, 4);
784 *pos++ = WLAN_EID_PWR_CAPABILITY;
785 *pos++ = 2;
786 *pos++ = 0; /* min tx power */
787 *pos++ = chan->max_power; /* max tx power */
788
789 /* 2. supported channels */
790 /* TODO: get this in reg domain format */
791 pos = skb_put(skb, 2 * sband->n_channels + 2);
792 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
793 *pos++ = 2 * sband->n_channels;
794 for (i = 0; i < sband->n_channels; i++) {
795 *pos++ = ieee80211_frequency_to_channel(
796 sband->channels[i].center_freq);
797 *pos++ = 1; /* one channel in the subband*/
798 }
799 }
800
801 /* if present, add any custom IEs that go before HT */
802 if (assoc_data->ie_len && assoc_data->ie) {
803 static const u8 before_ht[] = {
804 WLAN_EID_SSID,
805 WLAN_EID_SUPP_RATES,
806 WLAN_EID_EXT_SUPP_RATES,
807 WLAN_EID_PWR_CAPABILITY,
808 WLAN_EID_SUPPORTED_CHANNELS,
809 WLAN_EID_RSN,
810 WLAN_EID_QOS_CAPA,
811 WLAN_EID_RRM_ENABLED_CAPABILITIES,
812 WLAN_EID_MOBILITY_DOMAIN,
813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
814 };
815 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
816 before_ht, ARRAY_SIZE(before_ht),
817 offset);
818 pos = skb_put(skb, noffset - offset);
819 memcpy(pos, assoc_data->ie + offset, noffset - offset);
820 offset = noffset;
821 }
822
823 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
824 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
825 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
826
827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
828 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
829 sband, chan, sdata->smps_mode);
830
831 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
832 ieee80211_add_vht_ie(sdata, skb, sband,
833 &assoc_data->ap_vht_cap);
834
835 /* if present, add any custom non-vendor IEs that go after HT */
836 if (assoc_data->ie_len && assoc_data->ie) {
837 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
838 assoc_data->ie_len,
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
845 if (assoc_data->wmm) {
846 if (assoc_data->uapsd) {
847 qos_info = ifmgd->uapsd_queues;
848 qos_info |= (ifmgd->uapsd_max_sp_len <<
849 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
850 } else {
851 qos_info = 0;
852 }
853
854 pos = skb_put(skb, 9);
855 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
856 *pos++ = 7; /* len */
857 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
858 *pos++ = 0x50;
859 *pos++ = 0xf2;
860 *pos++ = 2; /* WME */
861 *pos++ = 0; /* WME info */
862 *pos++ = 1; /* WME ver */
863 *pos++ = qos_info;
864 }
865
866 /* add any remaining custom (i.e. vendor specific here) IEs */
867 if (assoc_data->ie_len && assoc_data->ie) {
868 noffset = assoc_data->ie_len;
869 pos = skb_put(skb, noffset - offset);
870 memcpy(pos, assoc_data->ie + offset, noffset - offset);
871 }
872
873 drv_mgd_prepare_tx(local, sdata);
874
875 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
876 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
877 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
878 IEEE80211_TX_INTFL_MLME_CONN_TX;
879 ieee80211_tx_skb(sdata, skb);
880 }
881
882 void ieee80211_send_pspoll(struct ieee80211_local *local,
883 struct ieee80211_sub_if_data *sdata)
884 {
885 struct ieee80211_pspoll *pspoll;
886 struct sk_buff *skb;
887
888 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
889 if (!skb)
890 return;
891
892 pspoll = (struct ieee80211_pspoll *) skb->data;
893 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
894
895 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
896 ieee80211_tx_skb(sdata, skb);
897 }
898
899 void ieee80211_send_nullfunc(struct ieee80211_local *local,
900 struct ieee80211_sub_if_data *sdata,
901 int powersave)
902 {
903 struct sk_buff *skb;
904 struct ieee80211_hdr_3addr *nullfunc;
905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
906
907 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
908 if (!skb)
909 return;
910
911 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
912 if (powersave)
913 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
914
915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
916 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
917 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
920
921 ieee80211_tx_skb(sdata, skb);
922 }
923
924 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
925 struct ieee80211_sub_if_data *sdata)
926 {
927 struct sk_buff *skb;
928 struct ieee80211_hdr *nullfunc;
929 __le16 fc;
930
931 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
932 return;
933
934 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
935 if (!skb)
936 return;
937
938 skb_reserve(skb, local->hw.extra_tx_headroom);
939
940 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
941 memset(nullfunc, 0, 30);
942 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
943 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
944 nullfunc->frame_control = fc;
945 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
946 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
947 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
948 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
949
950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
951 ieee80211_tx_skb(sdata, skb);
952 }
953
954 /* spectrum management related things */
955 static void ieee80211_chswitch_work(struct work_struct *work)
956 {
957 struct ieee80211_sub_if_data *sdata =
958 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
959 struct ieee80211_local *local = sdata->local;
960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
961
962 if (!ieee80211_sdata_running(sdata))
963 return;
964
965 mutex_lock(&ifmgd->mtx);
966 if (!ifmgd->associated)
967 goto out;
968
969 local->_oper_chandef = local->csa_chandef;
970
971 if (!local->ops->channel_switch) {
972 /* call "hw_config" only if doing sw channel switch */
973 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
974 } else {
975 /* update the device channel directly */
976 local->hw.conf.chandef = local->_oper_chandef;
977 }
978
979 /* XXX: shouldn't really modify cfg80211-owned data! */
980 ifmgd->associated->channel = local->_oper_chandef.chan;
981
982 /* XXX: wait for a beacon first? */
983 ieee80211_wake_queues_by_reason(&local->hw,
984 IEEE80211_MAX_QUEUE_MAP,
985 IEEE80211_QUEUE_STOP_REASON_CSA);
986 out:
987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
988 mutex_unlock(&ifmgd->mtx);
989 }
990
991 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
992 {
993 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
995
996 trace_api_chswitch_done(sdata, success);
997 if (!success) {
998 sdata_info(sdata,
999 "driver channel switch failed, disconnecting\n");
1000 ieee80211_queue_work(&sdata->local->hw,
1001 &ifmgd->csa_connection_drop_work);
1002 } else {
1003 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1004 }
1005 }
1006 EXPORT_SYMBOL(ieee80211_chswitch_done);
1007
1008 static void ieee80211_chswitch_timer(unsigned long data)
1009 {
1010 struct ieee80211_sub_if_data *sdata =
1011 (struct ieee80211_sub_if_data *) data;
1012
1013 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1014 }
1015
1016 static void
1017 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1018 u64 timestamp, struct ieee802_11_elems *elems)
1019 {
1020 struct ieee80211_local *local = sdata->local;
1021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1022 struct cfg80211_bss *cbss = ifmgd->associated;
1023 struct ieee80211_bss *bss;
1024 struct ieee80211_chanctx *chanctx;
1025 enum ieee80211_band new_band;
1026 int new_freq;
1027 u8 new_chan_no;
1028 u8 count;
1029 u8 mode;
1030 struct ieee80211_channel *new_chan;
1031 struct cfg80211_chan_def new_chandef = {};
1032 struct cfg80211_chan_def new_vht_chandef = {};
1033 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1034 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1035 int secondary_channel_offset = -1;
1036
1037 ASSERT_MGD_MTX(ifmgd);
1038
1039 if (!cbss)
1040 return;
1041
1042 if (local->scanning)
1043 return;
1044
1045 /* disregard subsequent announcements if we are already processing */
1046 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1047 return;
1048
1049 sec_chan_offs = elems->sec_chan_offs;
1050 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1051
1052 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1053 IEEE80211_STA_DISABLE_40MHZ)) {
1054 sec_chan_offs = NULL;
1055 wide_bw_chansw_ie = NULL;
1056 }
1057
1058 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1059 wide_bw_chansw_ie = NULL;
1060
1061 if (elems->ext_chansw_ie) {
1062 if (!ieee80211_operating_class_to_band(
1063 elems->ext_chansw_ie->new_operating_class,
1064 &new_band)) {
1065 sdata_info(sdata,
1066 "cannot understand ECSA IE operating class %d, disconnecting\n",
1067 elems->ext_chansw_ie->new_operating_class);
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
1070 }
1071 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1072 count = elems->ext_chansw_ie->count;
1073 mode = elems->ext_chansw_ie->mode;
1074 } else if (elems->ch_switch_ie) {
1075 new_band = cbss->channel->band;
1076 new_chan_no = elems->ch_switch_ie->new_ch_num;
1077 count = elems->ch_switch_ie->count;
1078 mode = elems->ch_switch_ie->mode;
1079 } else {
1080 /* nothing here we understand */
1081 return;
1082 }
1083
1084 bss = (void *)cbss->priv;
1085
1086 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1087 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1088 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1089 sdata_info(sdata,
1090 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1091 ifmgd->associated->bssid, new_freq);
1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
1094 return;
1095 }
1096
1097 if (sec_chan_offs) {
1098 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1099 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1100 /* if HT is enabled and the IE not present, it's still HT */
1101 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1102 }
1103
1104 switch (secondary_channel_offset) {
1105 default:
1106 /* secondary_channel_offset was present but is invalid */
1107 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1108 cfg80211_chandef_create(&new_chandef, new_chan,
1109 NL80211_CHAN_HT20);
1110 break;
1111 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1112 cfg80211_chandef_create(&new_chandef, new_chan,
1113 NL80211_CHAN_HT40PLUS);
1114 break;
1115 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1116 cfg80211_chandef_create(&new_chandef, new_chan,
1117 NL80211_CHAN_HT40MINUS);
1118 break;
1119 case -1:
1120 cfg80211_chandef_create(&new_chandef, new_chan,
1121 NL80211_CHAN_NO_HT);
1122 break;
1123 }
1124
1125 if (wide_bw_chansw_ie) {
1126 new_vht_chandef.chan = new_chan;
1127 new_vht_chandef.center_freq1 =
1128 ieee80211_channel_to_frequency(
1129 wide_bw_chansw_ie->new_center_freq_seg0,
1130 new_band);
1131
1132 switch (wide_bw_chansw_ie->new_channel_width) {
1133 default:
1134 /* hmmm, ignore VHT and use HT if present */
1135 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1136 new_vht_chandef.chan = NULL;
1137 break;
1138 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1139 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1140 break;
1141 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1142 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1143 break;
1144 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1145 /* field is otherwise reserved */
1146 new_vht_chandef.center_freq2 =
1147 ieee80211_channel_to_frequency(
1148 wide_bw_chansw_ie->new_center_freq_seg1,
1149 new_band);
1150 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1151 break;
1152 }
1153 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1154 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1155 chandef_downgrade(&new_vht_chandef);
1156 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1157 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1158 chandef_downgrade(&new_vht_chandef);
1159 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1160 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1161 chandef_downgrade(&new_vht_chandef);
1162 }
1163
1164 /* if VHT data is there validate & use it */
1165 if (new_vht_chandef.chan) {
1166 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1167 &new_chandef)) {
1168 sdata_info(sdata,
1169 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1170 ifmgd->associated->bssid);
1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 return;
1174 }
1175 new_chandef = new_vht_chandef;
1176 }
1177
1178 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1179 IEEE80211_CHAN_DISABLED)) {
1180 sdata_info(sdata,
1181 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1182 ifmgd->associated->bssid, new_freq,
1183 new_chandef.width, new_chandef.center_freq1,
1184 new_chandef.center_freq2);
1185 ieee80211_queue_work(&local->hw,
1186 &ifmgd->csa_connection_drop_work);
1187 return;
1188 }
1189
1190 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1191
1192 if (local->use_chanctx) {
1193 sdata_info(sdata,
1194 "not handling channel switch with channel contexts\n");
1195 ieee80211_queue_work(&local->hw,
1196 &ifmgd->csa_connection_drop_work);
1197 return;
1198 }
1199
1200 mutex_lock(&local->chanctx_mtx);
1201 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1202 mutex_unlock(&local->chanctx_mtx);
1203 return;
1204 }
1205 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1206 struct ieee80211_chanctx, conf);
1207 if (chanctx->refcount > 1) {
1208 sdata_info(sdata,
1209 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1210 ieee80211_queue_work(&local->hw,
1211 &ifmgd->csa_connection_drop_work);
1212 mutex_unlock(&local->chanctx_mtx);
1213 return;
1214 }
1215 mutex_unlock(&local->chanctx_mtx);
1216
1217 local->csa_chandef = new_chandef;
1218
1219 if (mode)
1220 ieee80211_stop_queues_by_reason(&local->hw,
1221 IEEE80211_MAX_QUEUE_MAP,
1222 IEEE80211_QUEUE_STOP_REASON_CSA);
1223
1224 if (local->ops->channel_switch) {
1225 /* use driver's channel switch callback */
1226 struct ieee80211_channel_switch ch_switch = {
1227 .timestamp = timestamp,
1228 .block_tx = mode,
1229 .chandef = new_chandef,
1230 .count = count,
1231 };
1232
1233 drv_channel_switch(local, &ch_switch);
1234 return;
1235 }
1236
1237 /* channel switch handled in software */
1238 if (count <= 1)
1239 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1240 else
1241 mod_timer(&ifmgd->chswitch_timer,
1242 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1243 }
1244
1245 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1246 struct ieee80211_channel *channel,
1247 const u8 *country_ie, u8 country_ie_len,
1248 const u8 *pwr_constr_elem)
1249 {
1250 struct ieee80211_country_ie_triplet *triplet;
1251 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1252 int i, chan_pwr, chan_increment, new_ap_level;
1253 bool have_chan_pwr = false;
1254
1255 /* Invalid IE */
1256 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1257 return 0;
1258
1259 triplet = (void *)(country_ie + 3);
1260 country_ie_len -= 3;
1261
1262 switch (channel->band) {
1263 default:
1264 WARN_ON_ONCE(1);
1265 /* fall through */
1266 case IEEE80211_BAND_2GHZ:
1267 case IEEE80211_BAND_60GHZ:
1268 chan_increment = 1;
1269 break;
1270 case IEEE80211_BAND_5GHZ:
1271 chan_increment = 4;
1272 break;
1273 }
1274
1275 /* find channel */
1276 while (country_ie_len >= 3) {
1277 u8 first_channel = triplet->chans.first_channel;
1278
1279 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1280 goto next;
1281
1282 for (i = 0; i < triplet->chans.num_channels; i++) {
1283 if (first_channel + i * chan_increment == chan) {
1284 have_chan_pwr = true;
1285 chan_pwr = triplet->chans.max_power;
1286 break;
1287 }
1288 }
1289 if (have_chan_pwr)
1290 break;
1291
1292 next:
1293 triplet++;
1294 country_ie_len -= 3;
1295 }
1296
1297 if (!have_chan_pwr)
1298 return 0;
1299
1300 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1301
1302 if (sdata->ap_power_level == new_ap_level)
1303 return 0;
1304
1305 sdata_info(sdata,
1306 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1307 new_ap_level, chan_pwr, *pwr_constr_elem,
1308 sdata->u.mgd.bssid);
1309 sdata->ap_power_level = new_ap_level;
1310 if (__ieee80211_recalc_txpower(sdata))
1311 return BSS_CHANGED_TXPOWER;
1312 return 0;
1313 }
1314
1315 /* powersave */
1316 static void ieee80211_enable_ps(struct ieee80211_local *local,
1317 struct ieee80211_sub_if_data *sdata)
1318 {
1319 struct ieee80211_conf *conf = &local->hw.conf;
1320
1321 /*
1322 * If we are scanning right now then the parameters will
1323 * take effect when scan finishes.
1324 */
1325 if (local->scanning)
1326 return;
1327
1328 if (conf->dynamic_ps_timeout > 0 &&
1329 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1330 mod_timer(&local->dynamic_ps_timer, jiffies +
1331 msecs_to_jiffies(conf->dynamic_ps_timeout));
1332 } else {
1333 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1334 ieee80211_send_nullfunc(local, sdata, 1);
1335
1336 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1337 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1338 return;
1339
1340 conf->flags |= IEEE80211_CONF_PS;
1341 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1342 }
1343 }
1344
1345 static void ieee80211_change_ps(struct ieee80211_local *local)
1346 {
1347 struct ieee80211_conf *conf = &local->hw.conf;
1348
1349 if (local->ps_sdata) {
1350 ieee80211_enable_ps(local, local->ps_sdata);
1351 } else if (conf->flags & IEEE80211_CONF_PS) {
1352 conf->flags &= ~IEEE80211_CONF_PS;
1353 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1354 del_timer_sync(&local->dynamic_ps_timer);
1355 cancel_work_sync(&local->dynamic_ps_enable_work);
1356 }
1357 }
1358
1359 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1360 {
1361 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1362 struct sta_info *sta = NULL;
1363 bool authorized = false;
1364
1365 if (!mgd->powersave)
1366 return false;
1367
1368 if (mgd->broken_ap)
1369 return false;
1370
1371 if (!mgd->associated)
1372 return false;
1373
1374 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1375 IEEE80211_STA_CONNECTION_POLL))
1376 return false;
1377
1378 rcu_read_lock();
1379 sta = sta_info_get(sdata, mgd->bssid);
1380 if (sta)
1381 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1382 rcu_read_unlock();
1383
1384 return authorized;
1385 }
1386
1387 /* need to hold RTNL or interface lock */
1388 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1389 {
1390 struct ieee80211_sub_if_data *sdata, *found = NULL;
1391 int count = 0;
1392 int timeout;
1393
1394 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1395 local->ps_sdata = NULL;
1396 return;
1397 }
1398
1399 list_for_each_entry(sdata, &local->interfaces, list) {
1400 if (!ieee80211_sdata_running(sdata))
1401 continue;
1402 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1403 /* If an AP vif is found, then disable PS
1404 * by setting the count to zero thereby setting
1405 * ps_sdata to NULL.
1406 */
1407 count = 0;
1408 break;
1409 }
1410 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1411 continue;
1412 found = sdata;
1413 count++;
1414 }
1415
1416 if (count == 1 && ieee80211_powersave_allowed(found)) {
1417 s32 beaconint_us;
1418
1419 if (latency < 0)
1420 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1421
1422 beaconint_us = ieee80211_tu_to_usec(
1423 found->vif.bss_conf.beacon_int);
1424
1425 timeout = local->dynamic_ps_forced_timeout;
1426 if (timeout < 0) {
1427 /*
1428 * Go to full PSM if the user configures a very low
1429 * latency requirement.
1430 * The 2000 second value is there for compatibility
1431 * until the PM_QOS_NETWORK_LATENCY is configured
1432 * with real values.
1433 */
1434 if (latency > (1900 * USEC_PER_MSEC) &&
1435 latency != (2000 * USEC_PER_SEC))
1436 timeout = 0;
1437 else
1438 timeout = 100;
1439 }
1440 local->hw.conf.dynamic_ps_timeout = timeout;
1441
1442 if (beaconint_us > latency) {
1443 local->ps_sdata = NULL;
1444 } else {
1445 int maxslp = 1;
1446 u8 dtimper = found->u.mgd.dtim_period;
1447
1448 /* If the TIM IE is invalid, pretend the value is 1 */
1449 if (!dtimper)
1450 dtimper = 1;
1451 else if (dtimper > 1)
1452 maxslp = min_t(int, dtimper,
1453 latency / beaconint_us);
1454
1455 local->hw.conf.max_sleep_period = maxslp;
1456 local->hw.conf.ps_dtim_period = dtimper;
1457 local->ps_sdata = found;
1458 }
1459 } else {
1460 local->ps_sdata = NULL;
1461 }
1462
1463 ieee80211_change_ps(local);
1464 }
1465
1466 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1467 {
1468 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1469
1470 if (sdata->vif.bss_conf.ps != ps_allowed) {
1471 sdata->vif.bss_conf.ps = ps_allowed;
1472 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1473 }
1474 }
1475
1476 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1477 {
1478 struct ieee80211_local *local =
1479 container_of(work, struct ieee80211_local,
1480 dynamic_ps_disable_work);
1481
1482 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1483 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1484 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1485 }
1486
1487 ieee80211_wake_queues_by_reason(&local->hw,
1488 IEEE80211_MAX_QUEUE_MAP,
1489 IEEE80211_QUEUE_STOP_REASON_PS);
1490 }
1491
1492 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1493 {
1494 struct ieee80211_local *local =
1495 container_of(work, struct ieee80211_local,
1496 dynamic_ps_enable_work);
1497 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1498 struct ieee80211_if_managed *ifmgd;
1499 unsigned long flags;
1500 int q;
1501
1502 /* can only happen when PS was just disabled anyway */
1503 if (!sdata)
1504 return;
1505
1506 ifmgd = &sdata->u.mgd;
1507
1508 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1509 return;
1510
1511 if (local->hw.conf.dynamic_ps_timeout > 0) {
1512 /* don't enter PS if TX frames are pending */
1513 if (drv_tx_frames_pending(local)) {
1514 mod_timer(&local->dynamic_ps_timer, jiffies +
1515 msecs_to_jiffies(
1516 local->hw.conf.dynamic_ps_timeout));
1517 return;
1518 }
1519
1520 /*
1521 * transmission can be stopped by others which leads to
1522 * dynamic_ps_timer expiry. Postpone the ps timer if it
1523 * is not the actual idle state.
1524 */
1525 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1526 for (q = 0; q < local->hw.queues; q++) {
1527 if (local->queue_stop_reasons[q]) {
1528 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1529 flags);
1530 mod_timer(&local->dynamic_ps_timer, jiffies +
1531 msecs_to_jiffies(
1532 local->hw.conf.dynamic_ps_timeout));
1533 return;
1534 }
1535 }
1536 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1537 }
1538
1539 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1540 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1541 if (drv_tx_frames_pending(local)) {
1542 mod_timer(&local->dynamic_ps_timer, jiffies +
1543 msecs_to_jiffies(
1544 local->hw.conf.dynamic_ps_timeout));
1545 } else {
1546 ieee80211_send_nullfunc(local, sdata, 1);
1547 /* Flush to get the tx status of nullfunc frame */
1548 ieee80211_flush_queues(local, sdata);
1549 }
1550 }
1551
1552 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1553 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1554 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1555 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1556 local->hw.conf.flags |= IEEE80211_CONF_PS;
1557 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1558 }
1559 }
1560
1561 void ieee80211_dynamic_ps_timer(unsigned long data)
1562 {
1563 struct ieee80211_local *local = (void *) data;
1564
1565 if (local->quiescing || local->suspended)
1566 return;
1567
1568 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1569 }
1570
1571 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1572 {
1573 struct delayed_work *delayed_work =
1574 container_of(work, struct delayed_work, work);
1575 struct ieee80211_sub_if_data *sdata =
1576 container_of(delayed_work, struct ieee80211_sub_if_data,
1577 dfs_cac_timer_work);
1578
1579 ieee80211_vif_release_channel(sdata);
1580
1581 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1582 }
1583
1584 /* MLME */
1585 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1586 struct ieee80211_sub_if_data *sdata,
1587 const u8 *wmm_param, size_t wmm_param_len)
1588 {
1589 struct ieee80211_tx_queue_params params;
1590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1591 size_t left;
1592 int count;
1593 const u8 *pos;
1594 u8 uapsd_queues = 0;
1595
1596 if (!local->ops->conf_tx)
1597 return false;
1598
1599 if (local->hw.queues < IEEE80211_NUM_ACS)
1600 return false;
1601
1602 if (!wmm_param)
1603 return false;
1604
1605 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1606 return false;
1607
1608 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1609 uapsd_queues = ifmgd->uapsd_queues;
1610
1611 count = wmm_param[6] & 0x0f;
1612 if (count == ifmgd->wmm_last_param_set)
1613 return false;
1614 ifmgd->wmm_last_param_set = count;
1615
1616 pos = wmm_param + 8;
1617 left = wmm_param_len - 8;
1618
1619 memset(&params, 0, sizeof(params));
1620
1621 sdata->wmm_acm = 0;
1622 for (; left >= 4; left -= 4, pos += 4) {
1623 int aci = (pos[0] >> 5) & 0x03;
1624 int acm = (pos[0] >> 4) & 0x01;
1625 bool uapsd = false;
1626 int queue;
1627
1628 switch (aci) {
1629 case 1: /* AC_BK */
1630 queue = 3;
1631 if (acm)
1632 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1633 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1634 uapsd = true;
1635 break;
1636 case 2: /* AC_VI */
1637 queue = 1;
1638 if (acm)
1639 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1641 uapsd = true;
1642 break;
1643 case 3: /* AC_VO */
1644 queue = 0;
1645 if (acm)
1646 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1647 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1648 uapsd = true;
1649 break;
1650 case 0: /* AC_BE */
1651 default:
1652 queue = 2;
1653 if (acm)
1654 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1656 uapsd = true;
1657 break;
1658 }
1659
1660 params.aifs = pos[0] & 0x0f;
1661 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1662 params.cw_min = ecw2cw(pos[1] & 0x0f);
1663 params.txop = get_unaligned_le16(pos + 2);
1664 params.acm = acm;
1665 params.uapsd = uapsd;
1666
1667 mlme_dbg(sdata,
1668 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1669 queue, aci, acm,
1670 params.aifs, params.cw_min, params.cw_max,
1671 params.txop, params.uapsd);
1672 sdata->tx_conf[queue] = params;
1673 if (drv_conf_tx(local, sdata, queue, &params))
1674 sdata_err(sdata,
1675 "failed to set TX queue parameters for queue %d\n",
1676 queue);
1677 }
1678
1679 /* enable WMM or activate new settings */
1680 sdata->vif.bss_conf.qos = true;
1681 return true;
1682 }
1683
1684 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1685 {
1686 lockdep_assert_held(&sdata->local->mtx);
1687
1688 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1689 IEEE80211_STA_BEACON_POLL);
1690 ieee80211_run_deferred_scan(sdata->local);
1691 }
1692
1693 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1694 {
1695 mutex_lock(&sdata->local->mtx);
1696 __ieee80211_stop_poll(sdata);
1697 mutex_unlock(&sdata->local->mtx);
1698 }
1699
1700 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1701 u16 capab, bool erp_valid, u8 erp)
1702 {
1703 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1704 u32 changed = 0;
1705 bool use_protection;
1706 bool use_short_preamble;
1707 bool use_short_slot;
1708
1709 if (erp_valid) {
1710 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1711 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1712 } else {
1713 use_protection = false;
1714 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1715 }
1716
1717 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1718 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1719 use_short_slot = true;
1720
1721 if (use_protection != bss_conf->use_cts_prot) {
1722 bss_conf->use_cts_prot = use_protection;
1723 changed |= BSS_CHANGED_ERP_CTS_PROT;
1724 }
1725
1726 if (use_short_preamble != bss_conf->use_short_preamble) {
1727 bss_conf->use_short_preamble = use_short_preamble;
1728 changed |= BSS_CHANGED_ERP_PREAMBLE;
1729 }
1730
1731 if (use_short_slot != bss_conf->use_short_slot) {
1732 bss_conf->use_short_slot = use_short_slot;
1733 changed |= BSS_CHANGED_ERP_SLOT;
1734 }
1735
1736 return changed;
1737 }
1738
1739 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1740 struct cfg80211_bss *cbss,
1741 u32 bss_info_changed)
1742 {
1743 struct ieee80211_bss *bss = (void *)cbss->priv;
1744 struct ieee80211_local *local = sdata->local;
1745 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1746
1747 bss_info_changed |= BSS_CHANGED_ASSOC;
1748 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1749 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1750
1751 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1752 beacon_loss_count * bss_conf->beacon_int));
1753
1754 sdata->u.mgd.associated = cbss;
1755 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1756
1757 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1758
1759 if (sdata->vif.p2p) {
1760 const struct cfg80211_bss_ies *ies;
1761
1762 rcu_read_lock();
1763 ies = rcu_dereference(cbss->ies);
1764 if (ies) {
1765 int ret;
1766
1767 ret = cfg80211_get_p2p_attr(
1768 ies->data, ies->len,
1769 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1770 (u8 *) &bss_conf->p2p_noa_attr,
1771 sizeof(bss_conf->p2p_noa_attr));
1772 if (ret >= 2) {
1773 sdata->u.mgd.p2p_noa_index =
1774 bss_conf->p2p_noa_attr.index;
1775 bss_info_changed |= BSS_CHANGED_P2P_PS;
1776 }
1777 }
1778 rcu_read_unlock();
1779 }
1780
1781 /* just to be sure */
1782 ieee80211_stop_poll(sdata);
1783
1784 ieee80211_led_assoc(local, 1);
1785
1786 if (sdata->u.mgd.assoc_data->have_beacon) {
1787 /*
1788 * If the AP is buggy we may get here with no DTIM period
1789 * known, so assume it's 1 which is the only safe assumption
1790 * in that case, although if the TIM IE is broken powersave
1791 * probably just won't work at all.
1792 */
1793 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1794 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
1795 } else {
1796 bss_conf->dtim_period = 0;
1797 }
1798
1799 bss_conf->assoc = 1;
1800
1801 /* Tell the driver to monitor connection quality (if supported) */
1802 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1803 bss_conf->cqm_rssi_thold)
1804 bss_info_changed |= BSS_CHANGED_CQM;
1805
1806 /* Enable ARP filtering */
1807 if (bss_conf->arp_addr_cnt)
1808 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1809
1810 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1811
1812 mutex_lock(&local->iflist_mtx);
1813 ieee80211_recalc_ps(local, -1);
1814 mutex_unlock(&local->iflist_mtx);
1815
1816 ieee80211_recalc_smps(sdata);
1817 ieee80211_recalc_ps_vif(sdata);
1818
1819 netif_carrier_on(sdata->dev);
1820 }
1821
1822 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1823 u16 stype, u16 reason, bool tx,
1824 u8 *frame_buf)
1825 {
1826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1827 struct ieee80211_local *local = sdata->local;
1828 u32 changed = 0;
1829
1830 ASSERT_MGD_MTX(ifmgd);
1831
1832 if (WARN_ON_ONCE(tx && !frame_buf))
1833 return;
1834
1835 if (WARN_ON(!ifmgd->associated))
1836 return;
1837
1838 ieee80211_stop_poll(sdata);
1839
1840 ifmgd->associated = NULL;
1841 netif_carrier_off(sdata->dev);
1842
1843 /*
1844 * if we want to get out of ps before disassoc (why?) we have
1845 * to do it before sending disassoc, as otherwise the null-packet
1846 * won't be valid.
1847 */
1848 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1849 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1850 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1851 }
1852 local->ps_sdata = NULL;
1853
1854 /* disable per-vif ps */
1855 ieee80211_recalc_ps_vif(sdata);
1856
1857 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1858 if (tx)
1859 ieee80211_flush_queues(local, sdata);
1860
1861 /* deauthenticate/disassociate now */
1862 if (tx || frame_buf)
1863 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1864 reason, tx, frame_buf);
1865
1866 /* flush out frame */
1867 if (tx)
1868 ieee80211_flush_queues(local, sdata);
1869
1870 /* clear bssid only after building the needed mgmt frames */
1871 memset(ifmgd->bssid, 0, ETH_ALEN);
1872
1873 /* remove AP and TDLS peers */
1874 sta_info_flush_defer(sdata);
1875
1876 /* finally reset all BSS / config parameters */
1877 changed |= ieee80211_reset_erp_info(sdata);
1878
1879 ieee80211_led_assoc(local, 0);
1880 changed |= BSS_CHANGED_ASSOC;
1881 sdata->vif.bss_conf.assoc = false;
1882
1883 ifmgd->p2p_noa_index = -1;
1884 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1885 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1886
1887 /* on the next assoc, re-program HT/VHT parameters */
1888 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1889 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1890 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1891 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1892
1893 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1894
1895 del_timer_sync(&local->dynamic_ps_timer);
1896 cancel_work_sync(&local->dynamic_ps_enable_work);
1897
1898 /* Disable ARP filtering */
1899 if (sdata->vif.bss_conf.arp_addr_cnt)
1900 changed |= BSS_CHANGED_ARP_FILTER;
1901
1902 sdata->vif.bss_conf.qos = false;
1903 changed |= BSS_CHANGED_QOS;
1904
1905 /* The BSSID (not really interesting) and HT changed */
1906 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1907 ieee80211_bss_info_change_notify(sdata, changed);
1908
1909 /* disassociated - set to defaults now */
1910 ieee80211_set_wmm_default(sdata, false);
1911
1912 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1913 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1914 del_timer_sync(&sdata->u.mgd.timer);
1915 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1916
1917 sdata->vif.bss_conf.dtim_period = 0;
1918
1919 ifmgd->flags = 0;
1920 ieee80211_vif_release_channel(sdata);
1921 }
1922
1923 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1924 struct ieee80211_hdr *hdr)
1925 {
1926 /*
1927 * We can postpone the mgd.timer whenever receiving unicast frames
1928 * from AP because we know that the connection is working both ways
1929 * at that time. But multicast frames (and hence also beacons) must
1930 * be ignored here, because we need to trigger the timer during
1931 * data idle periods for sending the periodic probe request to the
1932 * AP we're connected to.
1933 */
1934 if (is_multicast_ether_addr(hdr->addr1))
1935 return;
1936
1937 ieee80211_sta_reset_conn_monitor(sdata);
1938 }
1939
1940 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1941 {
1942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1943 struct ieee80211_local *local = sdata->local;
1944
1945 mutex_lock(&local->mtx);
1946 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1947 IEEE80211_STA_CONNECTION_POLL))) {
1948 mutex_unlock(&local->mtx);
1949 return;
1950 }
1951
1952 __ieee80211_stop_poll(sdata);
1953
1954 mutex_lock(&local->iflist_mtx);
1955 ieee80211_recalc_ps(local, -1);
1956 mutex_unlock(&local->iflist_mtx);
1957
1958 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1959 goto out;
1960
1961 /*
1962 * We've received a probe response, but are not sure whether
1963 * we have or will be receiving any beacons or data, so let's
1964 * schedule the timers again, just in case.
1965 */
1966 ieee80211_sta_reset_beacon_monitor(sdata);
1967
1968 mod_timer(&ifmgd->conn_mon_timer,
1969 round_jiffies_up(jiffies +
1970 IEEE80211_CONNECTION_IDLE_TIME));
1971 out:
1972 mutex_unlock(&local->mtx);
1973 }
1974
1975 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1976 struct ieee80211_hdr *hdr, bool ack)
1977 {
1978 if (!ieee80211_is_data(hdr->frame_control))
1979 return;
1980
1981 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1982 sdata->u.mgd.probe_send_count > 0) {
1983 if (ack)
1984 ieee80211_sta_reset_conn_monitor(sdata);
1985 else
1986 sdata->u.mgd.nullfunc_failed = true;
1987 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1988 return;
1989 }
1990
1991 if (ack)
1992 ieee80211_sta_reset_conn_monitor(sdata);
1993 }
1994
1995 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1996 {
1997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1998 const u8 *ssid;
1999 u8 *dst = ifmgd->associated->bssid;
2000 u8 unicast_limit = max(1, max_probe_tries - 3);
2001
2002 /*
2003 * Try sending broadcast probe requests for the last three
2004 * probe requests after the first ones failed since some
2005 * buggy APs only support broadcast probe requests.
2006 */
2007 if (ifmgd->probe_send_count >= unicast_limit)
2008 dst = NULL;
2009
2010 /*
2011 * When the hardware reports an accurate Tx ACK status, it's
2012 * better to send a nullfunc frame instead of a probe request,
2013 * as it will kick us off the AP quickly if we aren't associated
2014 * anymore. The timeout will be reset if the frame is ACKed by
2015 * the AP.
2016 */
2017 ifmgd->probe_send_count++;
2018
2019 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2020 ifmgd->nullfunc_failed = false;
2021 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2022 } else {
2023 int ssid_len;
2024
2025 rcu_read_lock();
2026 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2027 if (WARN_ON_ONCE(ssid == NULL))
2028 ssid_len = 0;
2029 else
2030 ssid_len = ssid[1];
2031
2032 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2033 0, (u32) -1, true, 0,
2034 ifmgd->associated->channel, false);
2035 rcu_read_unlock();
2036 }
2037
2038 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2039 run_again(ifmgd, ifmgd->probe_timeout);
2040 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2041 ieee80211_flush_queues(sdata->local, sdata);
2042 }
2043
2044 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2045 bool beacon)
2046 {
2047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2048 bool already = false;
2049
2050 if (!ieee80211_sdata_running(sdata))
2051 return;
2052
2053 mutex_lock(&ifmgd->mtx);
2054
2055 if (!ifmgd->associated)
2056 goto out;
2057
2058 mutex_lock(&sdata->local->mtx);
2059
2060 if (sdata->local->tmp_channel || sdata->local->scanning) {
2061 mutex_unlock(&sdata->local->mtx);
2062 goto out;
2063 }
2064
2065 if (beacon) {
2066 mlme_dbg_ratelimited(sdata,
2067 "detected beacon loss from AP (missed %d beacons) - probing\n",
2068 beacon_loss_count);
2069
2070 ieee80211_cqm_rssi_notify(&sdata->vif,
2071 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2072 GFP_KERNEL);
2073 }
2074
2075 /*
2076 * The driver/our work has already reported this event or the
2077 * connection monitoring has kicked in and we have already sent
2078 * a probe request. Or maybe the AP died and the driver keeps
2079 * reporting until we disassociate...
2080 *
2081 * In either case we have to ignore the current call to this
2082 * function (except for setting the correct probe reason bit)
2083 * because otherwise we would reset the timer every time and
2084 * never check whether we received a probe response!
2085 */
2086 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2087 IEEE80211_STA_CONNECTION_POLL))
2088 already = true;
2089
2090 if (beacon)
2091 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2092 else
2093 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2094
2095 mutex_unlock(&sdata->local->mtx);
2096
2097 if (already)
2098 goto out;
2099
2100 mutex_lock(&sdata->local->iflist_mtx);
2101 ieee80211_recalc_ps(sdata->local, -1);
2102 mutex_unlock(&sdata->local->iflist_mtx);
2103
2104 ifmgd->probe_send_count = 0;
2105 ieee80211_mgd_probe_ap_send(sdata);
2106 out:
2107 mutex_unlock(&ifmgd->mtx);
2108 }
2109
2110 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2111 struct ieee80211_vif *vif)
2112 {
2113 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2115 struct cfg80211_bss *cbss;
2116 struct sk_buff *skb;
2117 const u8 *ssid;
2118 int ssid_len;
2119
2120 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2121 return NULL;
2122
2123 ASSERT_MGD_MTX(ifmgd);
2124
2125 if (ifmgd->associated)
2126 cbss = ifmgd->associated;
2127 else if (ifmgd->auth_data)
2128 cbss = ifmgd->auth_data->bss;
2129 else if (ifmgd->assoc_data)
2130 cbss = ifmgd->assoc_data->bss;
2131 else
2132 return NULL;
2133
2134 rcu_read_lock();
2135 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2136 if (WARN_ON_ONCE(ssid == NULL))
2137 ssid_len = 0;
2138 else
2139 ssid_len = ssid[1];
2140
2141 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2142 (u32) -1, cbss->channel,
2143 ssid + 2, ssid_len,
2144 NULL, 0, true);
2145 rcu_read_unlock();
2146
2147 return skb;
2148 }
2149 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2150
2151 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2152 {
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2154 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2155
2156 mutex_lock(&ifmgd->mtx);
2157 if (!ifmgd->associated) {
2158 mutex_unlock(&ifmgd->mtx);
2159 return;
2160 }
2161
2162 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2163 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2164 true, frame_buf);
2165 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2166 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2167 IEEE80211_MAX_QUEUE_MAP,
2168 IEEE80211_QUEUE_STOP_REASON_CSA);
2169 mutex_unlock(&ifmgd->mtx);
2170
2171 /*
2172 * must be outside lock due to cfg80211,
2173 * but that's not a problem.
2174 */
2175 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2176 }
2177
2178 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2179 {
2180 struct ieee80211_sub_if_data *sdata =
2181 container_of(work, struct ieee80211_sub_if_data,
2182 u.mgd.beacon_connection_loss_work);
2183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2184 struct sta_info *sta;
2185
2186 if (ifmgd->associated) {
2187 rcu_read_lock();
2188 sta = sta_info_get(sdata, ifmgd->bssid);
2189 if (sta)
2190 sta->beacon_loss_count++;
2191 rcu_read_unlock();
2192 }
2193
2194 if (ifmgd->connection_loss) {
2195 sdata_info(sdata, "Connection to AP %pM lost\n",
2196 ifmgd->bssid);
2197 __ieee80211_disconnect(sdata);
2198 } else {
2199 ieee80211_mgd_probe_ap(sdata, true);
2200 }
2201 }
2202
2203 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2204 {
2205 struct ieee80211_sub_if_data *sdata =
2206 container_of(work, struct ieee80211_sub_if_data,
2207 u.mgd.csa_connection_drop_work);
2208
2209 __ieee80211_disconnect(sdata);
2210 }
2211
2212 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2213 {
2214 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2215 struct ieee80211_hw *hw = &sdata->local->hw;
2216
2217 trace_api_beacon_loss(sdata);
2218
2219 sdata->u.mgd.connection_loss = false;
2220 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2221 }
2222 EXPORT_SYMBOL(ieee80211_beacon_loss);
2223
2224 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2225 {
2226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2227 struct ieee80211_hw *hw = &sdata->local->hw;
2228
2229 trace_api_connection_loss(sdata);
2230
2231 sdata->u.mgd.connection_loss = true;
2232 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2233 }
2234 EXPORT_SYMBOL(ieee80211_connection_loss);
2235
2236
2237 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2238 bool assoc)
2239 {
2240 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2241
2242 lockdep_assert_held(&sdata->u.mgd.mtx);
2243
2244 if (!assoc) {
2245 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2246
2247 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2248 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2249 sdata->u.mgd.flags = 0;
2250 ieee80211_vif_release_channel(sdata);
2251 }
2252
2253 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2254 kfree(auth_data);
2255 sdata->u.mgd.auth_data = NULL;
2256 }
2257
2258 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2259 struct ieee80211_mgmt *mgmt, size_t len)
2260 {
2261 struct ieee80211_local *local = sdata->local;
2262 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2263 u8 *pos;
2264 struct ieee802_11_elems elems;
2265 u32 tx_flags = 0;
2266
2267 pos = mgmt->u.auth.variable;
2268 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2269 if (!elems.challenge)
2270 return;
2271 auth_data->expected_transaction = 4;
2272 drv_mgd_prepare_tx(sdata->local, sdata);
2273 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2274 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2275 IEEE80211_TX_INTFL_MLME_CONN_TX;
2276 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2277 elems.challenge - 2, elems.challenge_len + 2,
2278 auth_data->bss->bssid, auth_data->bss->bssid,
2279 auth_data->key, auth_data->key_len,
2280 auth_data->key_idx, tx_flags);
2281 }
2282
2283 static enum rx_mgmt_action __must_check
2284 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_mgmt *mgmt, size_t len)
2286 {
2287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2288 u8 bssid[ETH_ALEN];
2289 u16 auth_alg, auth_transaction, status_code;
2290 struct sta_info *sta;
2291
2292 lockdep_assert_held(&ifmgd->mtx);
2293
2294 if (len < 24 + 6)
2295 return RX_MGMT_NONE;
2296
2297 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2298 return RX_MGMT_NONE;
2299
2300 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2301
2302 if (!ether_addr_equal(bssid, mgmt->bssid))
2303 return RX_MGMT_NONE;
2304
2305 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2306 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2307 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2308
2309 if (auth_alg != ifmgd->auth_data->algorithm ||
2310 auth_transaction != ifmgd->auth_data->expected_transaction) {
2311 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2312 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2313 auth_transaction,
2314 ifmgd->auth_data->expected_transaction);
2315 return RX_MGMT_NONE;
2316 }
2317
2318 if (status_code != WLAN_STATUS_SUCCESS) {
2319 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2320 mgmt->sa, status_code);
2321 ieee80211_destroy_auth_data(sdata, false);
2322 return RX_MGMT_CFG80211_RX_AUTH;
2323 }
2324
2325 switch (ifmgd->auth_data->algorithm) {
2326 case WLAN_AUTH_OPEN:
2327 case WLAN_AUTH_LEAP:
2328 case WLAN_AUTH_FT:
2329 case WLAN_AUTH_SAE:
2330 break;
2331 case WLAN_AUTH_SHARED_KEY:
2332 if (ifmgd->auth_data->expected_transaction != 4) {
2333 ieee80211_auth_challenge(sdata, mgmt, len);
2334 /* need another frame */
2335 return RX_MGMT_NONE;
2336 }
2337 break;
2338 default:
2339 WARN_ONCE(1, "invalid auth alg %d",
2340 ifmgd->auth_data->algorithm);
2341 return RX_MGMT_NONE;
2342 }
2343
2344 sdata_info(sdata, "authenticated\n");
2345 ifmgd->auth_data->done = true;
2346 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2347 ifmgd->auth_data->timeout_started = true;
2348 run_again(ifmgd, ifmgd->auth_data->timeout);
2349
2350 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2351 ifmgd->auth_data->expected_transaction != 2) {
2352 /*
2353 * Report auth frame to user space for processing since another
2354 * round of Authentication frames is still needed.
2355 */
2356 return RX_MGMT_CFG80211_RX_AUTH;
2357 }
2358
2359 /* move station state to auth */
2360 mutex_lock(&sdata->local->sta_mtx);
2361 sta = sta_info_get(sdata, bssid);
2362 if (!sta) {
2363 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2364 goto out_err;
2365 }
2366 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2367 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2368 goto out_err;
2369 }
2370 mutex_unlock(&sdata->local->sta_mtx);
2371
2372 return RX_MGMT_CFG80211_RX_AUTH;
2373 out_err:
2374 mutex_unlock(&sdata->local->sta_mtx);
2375 /* ignore frame -- wait for timeout */
2376 return RX_MGMT_NONE;
2377 }
2378
2379
2380 static enum rx_mgmt_action __must_check
2381 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2382 struct ieee80211_mgmt *mgmt, size_t len)
2383 {
2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2385 const u8 *bssid = NULL;
2386 u16 reason_code;
2387
2388 lockdep_assert_held(&ifmgd->mtx);
2389
2390 if (len < 24 + 2)
2391 return RX_MGMT_NONE;
2392
2393 if (!ifmgd->associated ||
2394 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2395 return RX_MGMT_NONE;
2396
2397 bssid = ifmgd->associated->bssid;
2398
2399 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2400
2401 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2402 bssid, reason_code);
2403
2404 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2405
2406 return RX_MGMT_CFG80211_DEAUTH;
2407 }
2408
2409
2410 static enum rx_mgmt_action __must_check
2411 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2412 struct ieee80211_mgmt *mgmt, size_t len)
2413 {
2414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2415 u16 reason_code;
2416
2417 lockdep_assert_held(&ifmgd->mtx);
2418
2419 if (len < 24 + 2)
2420 return RX_MGMT_NONE;
2421
2422 if (!ifmgd->associated ||
2423 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2424 return RX_MGMT_NONE;
2425
2426 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2427
2428 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2429 mgmt->sa, reason_code);
2430
2431 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2432
2433 return RX_MGMT_CFG80211_DISASSOC;
2434 }
2435
2436 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2437 u8 *supp_rates, unsigned int supp_rates_len,
2438 u32 *rates, u32 *basic_rates,
2439 bool *have_higher_than_11mbit,
2440 int *min_rate, int *min_rate_index)
2441 {
2442 int i, j;
2443
2444 for (i = 0; i < supp_rates_len; i++) {
2445 int rate = (supp_rates[i] & 0x7f) * 5;
2446 bool is_basic = !!(supp_rates[i] & 0x80);
2447
2448 if (rate > 110)
2449 *have_higher_than_11mbit = true;
2450
2451 /*
2452 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2453 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2454 *
2455 * Note: Even through the membership selector and the basic
2456 * rate flag share the same bit, they are not exactly
2457 * the same.
2458 */
2459 if (!!(supp_rates[i] & 0x80) &&
2460 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2461 continue;
2462
2463 for (j = 0; j < sband->n_bitrates; j++) {
2464 if (sband->bitrates[j].bitrate == rate) {
2465 *rates |= BIT(j);
2466 if (is_basic)
2467 *basic_rates |= BIT(j);
2468 if (rate < *min_rate) {
2469 *min_rate = rate;
2470 *min_rate_index = j;
2471 }
2472 break;
2473 }
2474 }
2475 }
2476 }
2477
2478 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2479 bool assoc)
2480 {
2481 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2482
2483 lockdep_assert_held(&sdata->u.mgd.mtx);
2484
2485 if (!assoc) {
2486 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2487
2488 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2489 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2490 sdata->u.mgd.flags = 0;
2491 ieee80211_vif_release_channel(sdata);
2492 }
2493
2494 kfree(assoc_data);
2495 sdata->u.mgd.assoc_data = NULL;
2496 }
2497
2498 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2499 struct cfg80211_bss *cbss,
2500 struct ieee80211_mgmt *mgmt, size_t len)
2501 {
2502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2503 struct ieee80211_local *local = sdata->local;
2504 struct ieee80211_supported_band *sband;
2505 struct sta_info *sta;
2506 u8 *pos;
2507 u16 capab_info, aid;
2508 struct ieee802_11_elems elems;
2509 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2510 u32 changed = 0;
2511 int err;
2512
2513 /* AssocResp and ReassocResp have identical structure */
2514
2515 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2516 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2517
2518 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2519 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2520 aid);
2521 aid &= ~(BIT(15) | BIT(14));
2522
2523 ifmgd->broken_ap = false;
2524
2525 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2526 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2527 aid);
2528 aid = 0;
2529 ifmgd->broken_ap = true;
2530 }
2531
2532 pos = mgmt->u.assoc_resp.variable;
2533 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2534
2535 if (!elems.supp_rates) {
2536 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2537 return false;
2538 }
2539
2540 ifmgd->aid = aid;
2541
2542 /*
2543 * We previously checked these in the beacon/probe response, so
2544 * they should be present here. This is just a safety net.
2545 */
2546 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2547 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2548 sdata_info(sdata,
2549 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2550 return false;
2551 }
2552
2553 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2554 (!elems.vht_cap_elem || !elems.vht_operation)) {
2555 sdata_info(sdata,
2556 "VHT AP is missing VHT capability/operation in AssocResp\n");
2557 return false;
2558 }
2559
2560 mutex_lock(&sdata->local->sta_mtx);
2561 /*
2562 * station info was already allocated and inserted before
2563 * the association and should be available to us
2564 */
2565 sta = sta_info_get(sdata, cbss->bssid);
2566 if (WARN_ON(!sta)) {
2567 mutex_unlock(&sdata->local->sta_mtx);
2568 return false;
2569 }
2570
2571 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2572
2573 /* Set up internal HT/VHT capabilities */
2574 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2575 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2576 elems.ht_cap_elem, sta);
2577
2578 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2579 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2580 elems.vht_cap_elem, sta);
2581
2582 /*
2583 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2584 * in their association response, so ignore that data for our own
2585 * configuration. If it changed since the last beacon, we'll get the
2586 * next beacon and update then.
2587 */
2588
2589 /*
2590 * If an operating mode notification IE is present, override the
2591 * NSS calculation (that would be done in rate_control_rate_init())
2592 * and use the # of streams from that element.
2593 */
2594 if (elems.opmode_notif &&
2595 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2596 u8 nss;
2597
2598 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2599 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2600 nss += 1;
2601 sta->sta.rx_nss = nss;
2602 }
2603
2604 rate_control_rate_init(sta);
2605
2606 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2607 set_sta_flag(sta, WLAN_STA_MFP);
2608
2609 if (elems.wmm_param)
2610 set_sta_flag(sta, WLAN_STA_WME);
2611
2612 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2613 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2614 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2615 if (err) {
2616 sdata_info(sdata,
2617 "failed to move station %pM to desired state\n",
2618 sta->sta.addr);
2619 WARN_ON(__sta_info_destroy(sta));
2620 mutex_unlock(&sdata->local->sta_mtx);
2621 return false;
2622 }
2623
2624 mutex_unlock(&sdata->local->sta_mtx);
2625
2626 /*
2627 * Always handle WMM once after association regardless
2628 * of the first value the AP uses. Setting -1 here has
2629 * that effect because the AP values is an unsigned
2630 * 4-bit value.
2631 */
2632 ifmgd->wmm_last_param_set = -1;
2633
2634 if (elems.wmm_param)
2635 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2636 elems.wmm_param_len);
2637 else
2638 ieee80211_set_wmm_default(sdata, false);
2639 changed |= BSS_CHANGED_QOS;
2640
2641 /* set AID and assoc capability,
2642 * ieee80211_set_associated() will tell the driver */
2643 bss_conf->aid = aid;
2644 bss_conf->assoc_capability = capab_info;
2645 ieee80211_set_associated(sdata, cbss, changed);
2646
2647 /*
2648 * If we're using 4-addr mode, let the AP know that we're
2649 * doing so, so that it can create the STA VLAN on its side
2650 */
2651 if (ifmgd->use_4addr)
2652 ieee80211_send_4addr_nullfunc(local, sdata);
2653
2654 /*
2655 * Start timer to probe the connection to the AP now.
2656 * Also start the timer that will detect beacon loss.
2657 */
2658 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2659 ieee80211_sta_reset_beacon_monitor(sdata);
2660
2661 return true;
2662 }
2663
2664 static enum rx_mgmt_action __must_check
2665 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2666 struct ieee80211_mgmt *mgmt, size_t len,
2667 struct cfg80211_bss **bss)
2668 {
2669 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2670 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2671 u16 capab_info, status_code, aid;
2672 struct ieee802_11_elems elems;
2673 u8 *pos;
2674 bool reassoc;
2675
2676 lockdep_assert_held(&ifmgd->mtx);
2677
2678 if (!assoc_data)
2679 return RX_MGMT_NONE;
2680 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2681 return RX_MGMT_NONE;
2682
2683 /*
2684 * AssocResp and ReassocResp have identical structure, so process both
2685 * of them in this function.
2686 */
2687
2688 if (len < 24 + 6)
2689 return RX_MGMT_NONE;
2690
2691 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2692 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2693 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2694 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2695
2696 sdata_info(sdata,
2697 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2698 reassoc ? "Rea" : "A", mgmt->sa,
2699 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2700
2701 pos = mgmt->u.assoc_resp.variable;
2702 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2703
2704 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2705 elems.timeout_int &&
2706 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2707 u32 tu, ms;
2708 tu = le32_to_cpu(elems.timeout_int->value);
2709 ms = tu * 1024 / 1000;
2710 sdata_info(sdata,
2711 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2712 mgmt->sa, tu, ms);
2713 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2714 assoc_data->timeout_started = true;
2715 if (ms > IEEE80211_ASSOC_TIMEOUT)
2716 run_again(ifmgd, assoc_data->timeout);
2717 return RX_MGMT_NONE;
2718 }
2719
2720 *bss = assoc_data->bss;
2721
2722 if (status_code != WLAN_STATUS_SUCCESS) {
2723 sdata_info(sdata, "%pM denied association (code=%d)\n",
2724 mgmt->sa, status_code);
2725 ieee80211_destroy_assoc_data(sdata, false);
2726 } else {
2727 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2728 /* oops -- internal error -- send timeout for now */
2729 ieee80211_destroy_assoc_data(sdata, false);
2730 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
2731 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2732 }
2733 sdata_info(sdata, "associated\n");
2734
2735 /*
2736 * destroy assoc_data afterwards, as otherwise an idle
2737 * recalc after assoc_data is NULL but before associated
2738 * is set can cause the interface to go idle
2739 */
2740 ieee80211_destroy_assoc_data(sdata, true);
2741 }
2742
2743 return RX_MGMT_CFG80211_RX_ASSOC;
2744 }
2745
2746 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2747 struct ieee80211_mgmt *mgmt, size_t len,
2748 struct ieee80211_rx_status *rx_status,
2749 struct ieee802_11_elems *elems)
2750 {
2751 struct ieee80211_local *local = sdata->local;
2752 int freq;
2753 struct ieee80211_bss *bss;
2754 struct ieee80211_channel *channel;
2755 bool need_ps = false;
2756
2757 lockdep_assert_held(&sdata->u.mgd.mtx);
2758
2759 if ((sdata->u.mgd.associated &&
2760 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2761 (sdata->u.mgd.assoc_data &&
2762 ether_addr_equal(mgmt->bssid,
2763 sdata->u.mgd.assoc_data->bss->bssid))) {
2764 /* not previously set so we may need to recalc */
2765 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2766
2767 if (elems->tim && !elems->parse_error) {
2768 const struct ieee80211_tim_ie *tim_ie = elems->tim;
2769 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2770 }
2771 }
2772
2773 if (elems->ds_params)
2774 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2775 rx_status->band);
2776 else
2777 freq = rx_status->freq;
2778
2779 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2780
2781 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2782 return;
2783
2784 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2785 channel);
2786 if (bss)
2787 ieee80211_rx_bss_put(local, bss);
2788
2789 if (!sdata->u.mgd.associated ||
2790 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2791 return;
2792
2793 if (need_ps) {
2794 mutex_lock(&local->iflist_mtx);
2795 ieee80211_recalc_ps(local, -1);
2796 mutex_unlock(&local->iflist_mtx);
2797 }
2798
2799 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, elems);
2800
2801 }
2802
2803
2804 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2805 struct sk_buff *skb)
2806 {
2807 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2808 struct ieee80211_if_managed *ifmgd;
2809 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2810 size_t baselen, len = skb->len;
2811 struct ieee802_11_elems elems;
2812
2813 ifmgd = &sdata->u.mgd;
2814
2815 ASSERT_MGD_MTX(ifmgd);
2816
2817 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2818 return; /* ignore ProbeResp to foreign address */
2819
2820 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2821 if (baselen > len)
2822 return;
2823
2824 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2825 false, &elems);
2826
2827 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2828
2829 if (ifmgd->associated &&
2830 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2831 ieee80211_reset_ap_probe(sdata);
2832
2833 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2834 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2835 /* got probe response, continue with auth */
2836 sdata_info(sdata, "direct probe responded\n");
2837 ifmgd->auth_data->tries = 0;
2838 ifmgd->auth_data->timeout = jiffies;
2839 ifmgd->auth_data->timeout_started = true;
2840 run_again(ifmgd, ifmgd->auth_data->timeout);
2841 }
2842 }
2843
2844 /*
2845 * This is the canonical list of information elements we care about,
2846 * the filter code also gives us all changes to the Microsoft OUI
2847 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2848 *
2849 * We implement beacon filtering in software since that means we can
2850 * avoid processing the frame here and in cfg80211, and userspace
2851 * will not be able to tell whether the hardware supports it or not.
2852 *
2853 * XXX: This list needs to be dynamic -- userspace needs to be able to
2854 * add items it requires. It also needs to be able to tell us to
2855 * look out for other vendor IEs.
2856 */
2857 static const u64 care_about_ies =
2858 (1ULL << WLAN_EID_COUNTRY) |
2859 (1ULL << WLAN_EID_ERP_INFO) |
2860 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2861 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2862 (1ULL << WLAN_EID_HT_CAPABILITY) |
2863 (1ULL << WLAN_EID_HT_OPERATION);
2864
2865 static enum rx_mgmt_action
2866 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2867 struct ieee80211_mgmt *mgmt, size_t len,
2868 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
2869 {
2870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2871 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2872 size_t baselen;
2873 struct ieee802_11_elems elems;
2874 struct ieee80211_local *local = sdata->local;
2875 struct ieee80211_chanctx_conf *chanctx_conf;
2876 struct ieee80211_channel *chan;
2877 struct sta_info *sta;
2878 u32 changed = 0;
2879 bool erp_valid;
2880 u8 erp_value = 0;
2881 u32 ncrc;
2882 u8 *bssid;
2883
2884 lockdep_assert_held(&ifmgd->mtx);
2885
2886 /* Process beacon from the current BSS */
2887 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2888 if (baselen > len)
2889 return RX_MGMT_NONE;
2890
2891 rcu_read_lock();
2892 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2893 if (!chanctx_conf) {
2894 rcu_read_unlock();
2895 return RX_MGMT_NONE;
2896 }
2897
2898 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2899 rcu_read_unlock();
2900 return RX_MGMT_NONE;
2901 }
2902 chan = chanctx_conf->def.chan;
2903 rcu_read_unlock();
2904
2905 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2906 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2907 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2908 len - baselen, false, &elems);
2909
2910 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2911 ifmgd->assoc_data->have_beacon = true;
2912 ifmgd->assoc_data->need_beacon = false;
2913 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2914 sdata->vif.bss_conf.sync_tsf =
2915 le64_to_cpu(mgmt->u.beacon.timestamp);
2916 sdata->vif.bss_conf.sync_device_ts =
2917 rx_status->device_timestamp;
2918 if (elems.tim)
2919 sdata->vif.bss_conf.sync_dtim_count =
2920 elems.tim->dtim_count;
2921 else
2922 sdata->vif.bss_conf.sync_dtim_count = 0;
2923 }
2924 /* continue assoc process */
2925 ifmgd->assoc_data->timeout = jiffies;
2926 ifmgd->assoc_data->timeout_started = true;
2927 run_again(ifmgd, ifmgd->assoc_data->timeout);
2928 return RX_MGMT_NONE;
2929 }
2930
2931 if (!ifmgd->associated ||
2932 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2933 return RX_MGMT_NONE;
2934 bssid = ifmgd->associated->bssid;
2935
2936 /* Track average RSSI from the Beacon frames of the current AP */
2937 ifmgd->last_beacon_signal = rx_status->signal;
2938 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2939 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2940 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2941 ifmgd->last_cqm_event_signal = 0;
2942 ifmgd->count_beacon_signal = 1;
2943 ifmgd->last_ave_beacon_signal = 0;
2944 } else {
2945 ifmgd->ave_beacon_signal =
2946 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2947 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2948 ifmgd->ave_beacon_signal) / 16;
2949 ifmgd->count_beacon_signal++;
2950 }
2951
2952 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2953 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2954 int sig = ifmgd->ave_beacon_signal;
2955 int last_sig = ifmgd->last_ave_beacon_signal;
2956
2957 /*
2958 * if signal crosses either of the boundaries, invoke callback
2959 * with appropriate parameters
2960 */
2961 if (sig > ifmgd->rssi_max_thold &&
2962 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2963 ifmgd->last_ave_beacon_signal = sig;
2964 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2965 } else if (sig < ifmgd->rssi_min_thold &&
2966 (last_sig >= ifmgd->rssi_max_thold ||
2967 last_sig == 0)) {
2968 ifmgd->last_ave_beacon_signal = sig;
2969 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2970 }
2971 }
2972
2973 if (bss_conf->cqm_rssi_thold &&
2974 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2975 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2976 int sig = ifmgd->ave_beacon_signal / 16;
2977 int last_event = ifmgd->last_cqm_event_signal;
2978 int thold = bss_conf->cqm_rssi_thold;
2979 int hyst = bss_conf->cqm_rssi_hyst;
2980 if (sig < thold &&
2981 (last_event == 0 || sig < last_event - hyst)) {
2982 ifmgd->last_cqm_event_signal = sig;
2983 ieee80211_cqm_rssi_notify(
2984 &sdata->vif,
2985 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2986 GFP_KERNEL);
2987 } else if (sig > thold &&
2988 (last_event == 0 || sig > last_event + hyst)) {
2989 ifmgd->last_cqm_event_signal = sig;
2990 ieee80211_cqm_rssi_notify(
2991 &sdata->vif,
2992 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2993 GFP_KERNEL);
2994 }
2995 }
2996
2997 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
2998 mlme_dbg_ratelimited(sdata,
2999 "cancelling AP probe due to a received beacon\n");
3000 mutex_lock(&local->mtx);
3001 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3002 ieee80211_run_deferred_scan(local);
3003 mutex_unlock(&local->mtx);
3004
3005 mutex_lock(&local->iflist_mtx);
3006 ieee80211_recalc_ps(local, -1);
3007 mutex_unlock(&local->iflist_mtx);
3008 }
3009
3010 /*
3011 * Push the beacon loss detection into the future since
3012 * we are processing a beacon from the AP just now.
3013 */
3014 ieee80211_sta_reset_beacon_monitor(sdata);
3015
3016 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3017 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3018 len - baselen, false, &elems,
3019 care_about_ies, ncrc);
3020
3021 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3022 bool directed_tim = ieee80211_check_tim(elems.tim,
3023 elems.tim_len,
3024 ifmgd->aid);
3025 if (directed_tim) {
3026 if (local->hw.conf.dynamic_ps_timeout > 0) {
3027 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3028 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3029 ieee80211_hw_config(local,
3030 IEEE80211_CONF_CHANGE_PS);
3031 }
3032 ieee80211_send_nullfunc(local, sdata, 0);
3033 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3034 local->pspolling = true;
3035
3036 /*
3037 * Here is assumed that the driver will be
3038 * able to send ps-poll frame and receive a
3039 * response even though power save mode is
3040 * enabled, but some drivers might require
3041 * to disable power save here. This needs
3042 * to be investigated.
3043 */
3044 ieee80211_send_pspoll(local, sdata);
3045 }
3046 }
3047 }
3048
3049 if (sdata->vif.p2p) {
3050 struct ieee80211_p2p_noa_attr noa = {};
3051 int ret;
3052
3053 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3054 len - baselen,
3055 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3056 (u8 *) &noa, sizeof(noa));
3057 if (ret >= 2) {
3058 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3059 /* valid noa_attr and index changed */
3060 sdata->u.mgd.p2p_noa_index = noa.index;
3061 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3062 changed |= BSS_CHANGED_P2P_PS;
3063 /*
3064 * make sure we update all information, the CRC
3065 * mechanism doesn't look at P2P attributes.
3066 */
3067 ifmgd->beacon_crc_valid = false;
3068 }
3069 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3070 /* noa_attr not found and we had valid noa_attr before */
3071 sdata->u.mgd.p2p_noa_index = -1;
3072 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3073 changed |= BSS_CHANGED_P2P_PS;
3074 ifmgd->beacon_crc_valid = false;
3075 }
3076 }
3077
3078 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3079 return RX_MGMT_NONE;
3080 ifmgd->beacon_crc = ncrc;
3081 ifmgd->beacon_crc_valid = true;
3082
3083 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3084
3085 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3086 elems.wmm_param_len))
3087 changed |= BSS_CHANGED_QOS;
3088
3089 /*
3090 * If we haven't had a beacon before, tell the driver about the
3091 * DTIM period (and beacon timing if desired) now.
3092 */
3093 if (!bss_conf->dtim_period) {
3094 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3095 if (elems.tim)
3096 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3097 else
3098 bss_conf->dtim_period = 1;
3099
3100 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3101 sdata->vif.bss_conf.sync_tsf =
3102 le64_to_cpu(mgmt->u.beacon.timestamp);
3103 sdata->vif.bss_conf.sync_device_ts =
3104 rx_status->device_timestamp;
3105 if (elems.tim)
3106 sdata->vif.bss_conf.sync_dtim_count =
3107 elems.tim->dtim_count;
3108 else
3109 sdata->vif.bss_conf.sync_dtim_count = 0;
3110 }
3111
3112 changed |= BSS_CHANGED_DTIM_PERIOD;
3113 }
3114
3115 if (elems.erp_info) {
3116 erp_valid = true;
3117 erp_value = elems.erp_info[0];
3118 } else {
3119 erp_valid = false;
3120 }
3121 changed |= ieee80211_handle_bss_capability(sdata,
3122 le16_to_cpu(mgmt->u.beacon.capab_info),
3123 erp_valid, erp_value);
3124
3125 mutex_lock(&local->sta_mtx);
3126 sta = sta_info_get(sdata, bssid);
3127
3128 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3129 elems.vht_operation, bssid, &changed)) {
3130 mutex_unlock(&local->sta_mtx);
3131 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3132 WLAN_REASON_DEAUTH_LEAVING,
3133 true, deauth_buf);
3134 return RX_MGMT_CFG80211_TX_DEAUTH;
3135 }
3136
3137 if (sta && elems.opmode_notif)
3138 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3139 rx_status->band, true);
3140 mutex_unlock(&local->sta_mtx);
3141
3142 if (elems.country_elem && elems.pwr_constr_elem &&
3143 mgmt->u.probe_resp.capab_info &
3144 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3145 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3146 elems.country_elem,
3147 elems.country_elem_len,
3148 elems.pwr_constr_elem);
3149
3150 ieee80211_bss_info_change_notify(sdata, changed);
3151
3152 return RX_MGMT_NONE;
3153 }
3154
3155 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3156 struct sk_buff *skb)
3157 {
3158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3159 struct ieee80211_rx_status *rx_status;
3160 struct ieee80211_mgmt *mgmt;
3161 struct cfg80211_bss *bss = NULL;
3162 enum rx_mgmt_action rma = RX_MGMT_NONE;
3163 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3164 u16 fc;
3165 struct ieee802_11_elems elems;
3166 int ies_len;
3167
3168 rx_status = (struct ieee80211_rx_status *) skb->cb;
3169 mgmt = (struct ieee80211_mgmt *) skb->data;
3170 fc = le16_to_cpu(mgmt->frame_control);
3171
3172 mutex_lock(&ifmgd->mtx);
3173
3174 switch (fc & IEEE80211_FCTL_STYPE) {
3175 case IEEE80211_STYPE_BEACON:
3176 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3177 deauth_buf, rx_status);
3178 break;
3179 case IEEE80211_STYPE_PROBE_RESP:
3180 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3181 break;
3182 case IEEE80211_STYPE_AUTH:
3183 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3184 break;
3185 case IEEE80211_STYPE_DEAUTH:
3186 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3187 break;
3188 case IEEE80211_STYPE_DISASSOC:
3189 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3190 break;
3191 case IEEE80211_STYPE_ASSOC_RESP:
3192 case IEEE80211_STYPE_REASSOC_RESP:
3193 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3194 break;
3195 case IEEE80211_STYPE_ACTION:
3196 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3197 ies_len = skb->len -
3198 offsetof(struct ieee80211_mgmt,
3199 u.action.u.chan_switch.variable);
3200
3201 if (ies_len < 0)
3202 break;
3203
3204 ieee802_11_parse_elems(
3205 mgmt->u.action.u.chan_switch.variable,
3206 ies_len, true, &elems);
3207
3208 if (elems.parse_error)
3209 break;
3210
3211 ieee80211_sta_process_chanswitch(sdata,
3212 rx_status->mactime,
3213 &elems);
3214 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3215 ies_len = skb->len -
3216 offsetof(struct ieee80211_mgmt,
3217 u.action.u.ext_chan_switch.variable);
3218
3219 if (ies_len < 0)
3220 break;
3221
3222 ieee802_11_parse_elems(
3223 mgmt->u.action.u.ext_chan_switch.variable,
3224 ies_len, true, &elems);
3225
3226 if (elems.parse_error)
3227 break;
3228
3229 /* for the handling code pretend this was also an IE */
3230 elems.ext_chansw_ie =
3231 &mgmt->u.action.u.ext_chan_switch.data;
3232
3233 ieee80211_sta_process_chanswitch(sdata,
3234 rx_status->mactime,
3235 &elems);
3236 }
3237 break;
3238 }
3239 mutex_unlock(&ifmgd->mtx);
3240
3241 switch (rma) {
3242 case RX_MGMT_NONE:
3243 /* no action */
3244 break;
3245 case RX_MGMT_CFG80211_DEAUTH:
3246 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
3247 break;
3248 case RX_MGMT_CFG80211_DISASSOC:
3249 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3250 break;
3251 case RX_MGMT_CFG80211_RX_AUTH:
3252 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3253 break;
3254 case RX_MGMT_CFG80211_RX_ASSOC:
3255 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3256 break;
3257 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3258 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3259 break;
3260 case RX_MGMT_CFG80211_TX_DEAUTH:
3261 cfg80211_send_deauth(sdata->dev, deauth_buf,
3262 sizeof(deauth_buf));
3263 break;
3264 default:
3265 WARN(1, "unexpected: %d", rma);
3266 }
3267 }
3268
3269 static void ieee80211_sta_timer(unsigned long data)
3270 {
3271 struct ieee80211_sub_if_data *sdata =
3272 (struct ieee80211_sub_if_data *) data;
3273
3274 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3275 }
3276
3277 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3278 u8 *bssid, u8 reason, bool tx)
3279 {
3280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3281 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3282
3283 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3284 tx, frame_buf);
3285 mutex_unlock(&ifmgd->mtx);
3286
3287 /*
3288 * must be outside lock due to cfg80211,
3289 * but that's not a problem.
3290 */
3291 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
3292
3293 mutex_lock(&ifmgd->mtx);
3294 }
3295
3296 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3297 {
3298 struct ieee80211_local *local = sdata->local;
3299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3300 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3301 u32 tx_flags = 0;
3302
3303 lockdep_assert_held(&ifmgd->mtx);
3304
3305 if (WARN_ON_ONCE(!auth_data))
3306 return -EINVAL;
3307
3308 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3309 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3310 IEEE80211_TX_INTFL_MLME_CONN_TX;
3311
3312 auth_data->tries++;
3313
3314 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3315 sdata_info(sdata, "authentication with %pM timed out\n",
3316 auth_data->bss->bssid);
3317
3318 /*
3319 * Most likely AP is not in the range so remove the
3320 * bss struct for that AP.
3321 */
3322 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3323
3324 return -ETIMEDOUT;
3325 }
3326
3327 drv_mgd_prepare_tx(local, sdata);
3328
3329 if (auth_data->bss->proberesp_ies) {
3330 u16 trans = 1;
3331 u16 status = 0;
3332
3333 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3334 auth_data->bss->bssid, auth_data->tries,
3335 IEEE80211_AUTH_MAX_TRIES);
3336
3337 auth_data->expected_transaction = 2;
3338
3339 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3340 trans = auth_data->sae_trans;
3341 status = auth_data->sae_status;
3342 auth_data->expected_transaction = trans;
3343 }
3344
3345 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3346 auth_data->data, auth_data->data_len,
3347 auth_data->bss->bssid,
3348 auth_data->bss->bssid, NULL, 0, 0,
3349 tx_flags);
3350 } else {
3351 const u8 *ssidie;
3352
3353 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3354 auth_data->bss->bssid, auth_data->tries,
3355 IEEE80211_AUTH_MAX_TRIES);
3356
3357 rcu_read_lock();
3358 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3359 if (!ssidie) {
3360 rcu_read_unlock();
3361 return -EINVAL;
3362 }
3363 /*
3364 * Direct probe is sent to broadcast address as some APs
3365 * will not answer to direct packet in unassociated state.
3366 */
3367 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3368 NULL, 0, (u32) -1, true, tx_flags,
3369 auth_data->bss->channel, false);
3370 rcu_read_unlock();
3371 }
3372
3373 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3374 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3375 ifmgd->auth_data->timeout_started = true;
3376 run_again(ifmgd, auth_data->timeout);
3377 } else {
3378 auth_data->timeout_started = false;
3379 }
3380
3381 return 0;
3382 }
3383
3384 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3385 {
3386 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3387 struct ieee80211_local *local = sdata->local;
3388
3389 lockdep_assert_held(&sdata->u.mgd.mtx);
3390
3391 assoc_data->tries++;
3392 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3393 sdata_info(sdata, "association with %pM timed out\n",
3394 assoc_data->bss->bssid);
3395
3396 /*
3397 * Most likely AP is not in the range so remove the
3398 * bss struct for that AP.
3399 */
3400 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3401
3402 return -ETIMEDOUT;
3403 }
3404
3405 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3406 assoc_data->bss->bssid, assoc_data->tries,
3407 IEEE80211_ASSOC_MAX_TRIES);
3408 ieee80211_send_assoc(sdata);
3409
3410 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3411 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3412 assoc_data->timeout_started = true;
3413 run_again(&sdata->u.mgd, assoc_data->timeout);
3414 } else {
3415 assoc_data->timeout_started = false;
3416 }
3417
3418 return 0;
3419 }
3420
3421 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3422 __le16 fc, bool acked)
3423 {
3424 struct ieee80211_local *local = sdata->local;
3425
3426 sdata->u.mgd.status_fc = fc;
3427 sdata->u.mgd.status_acked = acked;
3428 sdata->u.mgd.status_received = true;
3429
3430 ieee80211_queue_work(&local->hw, &sdata->work);
3431 }
3432
3433 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3434 {
3435 struct ieee80211_local *local = sdata->local;
3436 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3437
3438 mutex_lock(&ifmgd->mtx);
3439
3440 if (ifmgd->status_received) {
3441 __le16 fc = ifmgd->status_fc;
3442 bool status_acked = ifmgd->status_acked;
3443
3444 ifmgd->status_received = false;
3445 if (ifmgd->auth_data &&
3446 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3447 if (status_acked) {
3448 ifmgd->auth_data->timeout =
3449 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3450 run_again(ifmgd, ifmgd->auth_data->timeout);
3451 } else {
3452 ifmgd->auth_data->timeout = jiffies - 1;
3453 }
3454 ifmgd->auth_data->timeout_started = true;
3455 } else if (ifmgd->assoc_data &&
3456 (ieee80211_is_assoc_req(fc) ||
3457 ieee80211_is_reassoc_req(fc))) {
3458 if (status_acked) {
3459 ifmgd->assoc_data->timeout =
3460 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3461 run_again(ifmgd, ifmgd->assoc_data->timeout);
3462 } else {
3463 ifmgd->assoc_data->timeout = jiffies - 1;
3464 }
3465 ifmgd->assoc_data->timeout_started = true;
3466 }
3467 }
3468
3469 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3470 time_after(jiffies, ifmgd->auth_data->timeout)) {
3471 if (ifmgd->auth_data->done) {
3472 /*
3473 * ok ... we waited for assoc but userspace didn't,
3474 * so let's just kill the auth data
3475 */
3476 ieee80211_destroy_auth_data(sdata, false);
3477 } else if (ieee80211_probe_auth(sdata)) {
3478 u8 bssid[ETH_ALEN];
3479
3480 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3481
3482 ieee80211_destroy_auth_data(sdata, false);
3483
3484 mutex_unlock(&ifmgd->mtx);
3485 cfg80211_send_auth_timeout(sdata->dev, bssid);
3486 mutex_lock(&ifmgd->mtx);
3487 }
3488 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3489 run_again(ifmgd, ifmgd->auth_data->timeout);
3490
3491 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3492 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3493 if ((ifmgd->assoc_data->need_beacon &&
3494 !ifmgd->assoc_data->have_beacon) ||
3495 ieee80211_do_assoc(sdata)) {
3496 u8 bssid[ETH_ALEN];
3497
3498 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3499
3500 ieee80211_destroy_assoc_data(sdata, false);
3501
3502 mutex_unlock(&ifmgd->mtx);
3503 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3504 mutex_lock(&ifmgd->mtx);
3505 }
3506 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3507 run_again(ifmgd, ifmgd->assoc_data->timeout);
3508
3509 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3510 IEEE80211_STA_CONNECTION_POLL) &&
3511 ifmgd->associated) {
3512 u8 bssid[ETH_ALEN];
3513 int max_tries;
3514
3515 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3516
3517 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3518 max_tries = max_nullfunc_tries;
3519 else
3520 max_tries = max_probe_tries;
3521
3522 /* ACK received for nullfunc probing frame */
3523 if (!ifmgd->probe_send_count)
3524 ieee80211_reset_ap_probe(sdata);
3525 else if (ifmgd->nullfunc_failed) {
3526 if (ifmgd->probe_send_count < max_tries) {
3527 mlme_dbg(sdata,
3528 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3529 bssid, ifmgd->probe_send_count,
3530 max_tries);
3531 ieee80211_mgd_probe_ap_send(sdata);
3532 } else {
3533 mlme_dbg(sdata,
3534 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3535 bssid);
3536 ieee80211_sta_connection_lost(sdata, bssid,
3537 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3538 false);
3539 }
3540 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3541 run_again(ifmgd, ifmgd->probe_timeout);
3542 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3543 mlme_dbg(sdata,
3544 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3545 bssid, probe_wait_ms);
3546 ieee80211_sta_connection_lost(sdata, bssid,
3547 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3548 } else if (ifmgd->probe_send_count < max_tries) {
3549 mlme_dbg(sdata,
3550 "No probe response from AP %pM after %dms, try %d/%i\n",
3551 bssid, probe_wait_ms,
3552 ifmgd->probe_send_count, max_tries);
3553 ieee80211_mgd_probe_ap_send(sdata);
3554 } else {
3555 /*
3556 * We actually lost the connection ... or did we?
3557 * Let's make sure!
3558 */
3559 wiphy_debug(local->hw.wiphy,
3560 "%s: No probe response from AP %pM"
3561 " after %dms, disconnecting.\n",
3562 sdata->name,
3563 bssid, probe_wait_ms);
3564
3565 ieee80211_sta_connection_lost(sdata, bssid,
3566 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3567 }
3568 }
3569
3570 mutex_unlock(&ifmgd->mtx);
3571 }
3572
3573 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3574 {
3575 struct ieee80211_sub_if_data *sdata =
3576 (struct ieee80211_sub_if_data *) data;
3577 struct ieee80211_local *local = sdata->local;
3578
3579 if (local->quiescing)
3580 return;
3581
3582 sdata->u.mgd.connection_loss = false;
3583 ieee80211_queue_work(&sdata->local->hw,
3584 &sdata->u.mgd.beacon_connection_loss_work);
3585 }
3586
3587 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3588 {
3589 struct ieee80211_sub_if_data *sdata =
3590 (struct ieee80211_sub_if_data *) data;
3591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3592 struct ieee80211_local *local = sdata->local;
3593
3594 if (local->quiescing)
3595 return;
3596
3597 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3598 }
3599
3600 static void ieee80211_sta_monitor_work(struct work_struct *work)
3601 {
3602 struct ieee80211_sub_if_data *sdata =
3603 container_of(work, struct ieee80211_sub_if_data,
3604 u.mgd.monitor_work);
3605
3606 ieee80211_mgd_probe_ap(sdata, false);
3607 }
3608
3609 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3610 {
3611 u32 flags;
3612
3613 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3614 __ieee80211_stop_poll(sdata);
3615
3616 /* let's probe the connection once */
3617 flags = sdata->local->hw.flags;
3618 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3619 ieee80211_queue_work(&sdata->local->hw,
3620 &sdata->u.mgd.monitor_work);
3621 /* and do all the other regular work too */
3622 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3623 }
3624 }
3625
3626 /* interface setup */
3627 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3628 {
3629 struct ieee80211_if_managed *ifmgd;
3630
3631 ifmgd = &sdata->u.mgd;
3632 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3633 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3634 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3635 ieee80211_beacon_connection_loss_work);
3636 INIT_WORK(&ifmgd->csa_connection_drop_work,
3637 ieee80211_csa_connection_drop_work);
3638 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3639 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3640 (unsigned long) sdata);
3641 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3642 (unsigned long) sdata);
3643 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3644 (unsigned long) sdata);
3645 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3646 (unsigned long) sdata);
3647
3648 ifmgd->flags = 0;
3649 ifmgd->powersave = sdata->wdev.ps;
3650 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3651 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3652 ifmgd->p2p_noa_index = -1;
3653
3654 mutex_init(&ifmgd->mtx);
3655
3656 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3657 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3658 else
3659 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3660 }
3661
3662 /* scan finished notification */
3663 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3664 {
3665 struct ieee80211_sub_if_data *sdata;
3666
3667 /* Restart STA timers */
3668 rcu_read_lock();
3669 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3670 if (ieee80211_sdata_running(sdata))
3671 ieee80211_restart_sta_timer(sdata);
3672 }
3673 rcu_read_unlock();
3674 }
3675
3676 int ieee80211_max_network_latency(struct notifier_block *nb,
3677 unsigned long data, void *dummy)
3678 {
3679 s32 latency_usec = (s32) data;
3680 struct ieee80211_local *local =
3681 container_of(nb, struct ieee80211_local,
3682 network_latency_notifier);
3683
3684 mutex_lock(&local->iflist_mtx);
3685 ieee80211_recalc_ps(local, latency_usec);
3686 mutex_unlock(&local->iflist_mtx);
3687
3688 return 0;
3689 }
3690
3691 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3692 struct cfg80211_bss *cbss)
3693 {
3694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3695 const u8 *ht_cap_ie, *vht_cap_ie;
3696 const struct ieee80211_ht_cap *ht_cap;
3697 const struct ieee80211_vht_cap *vht_cap;
3698 u8 chains = 1;
3699
3700 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3701 return chains;
3702
3703 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3704 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3705 ht_cap = (void *)(ht_cap_ie + 2);
3706 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3707 /*
3708 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3709 * "Tx Unequal Modulation Supported" fields.
3710 */
3711 }
3712
3713 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3714 return chains;
3715
3716 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3717 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3718 u8 nss;
3719 u16 tx_mcs_map;
3720
3721 vht_cap = (void *)(vht_cap_ie + 2);
3722 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3723 for (nss = 8; nss > 0; nss--) {
3724 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3725 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3726 break;
3727 }
3728 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3729 chains = max(chains, nss);
3730 }
3731
3732 return chains;
3733 }
3734
3735 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3736 struct cfg80211_bss *cbss)
3737 {
3738 struct ieee80211_local *local = sdata->local;
3739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3740 const struct ieee80211_ht_operation *ht_oper = NULL;
3741 const struct ieee80211_vht_operation *vht_oper = NULL;
3742 struct ieee80211_supported_band *sband;
3743 struct cfg80211_chan_def chandef;
3744 int ret;
3745
3746 sband = local->hw.wiphy->bands[cbss->channel->band];
3747
3748 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3749 IEEE80211_STA_DISABLE_80P80MHZ |
3750 IEEE80211_STA_DISABLE_160MHZ);
3751
3752 rcu_read_lock();
3753
3754 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3755 sband->ht_cap.ht_supported) {
3756 const u8 *ht_oper_ie, *ht_cap;
3757
3758 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3759 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3760 ht_oper = (void *)(ht_oper_ie + 2);
3761
3762 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3763 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3764 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3765 ht_oper = NULL;
3766 }
3767 }
3768
3769 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3770 sband->vht_cap.vht_supported) {
3771 const u8 *vht_oper_ie, *vht_cap;
3772
3773 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3774 WLAN_EID_VHT_OPERATION);
3775 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3776 vht_oper = (void *)(vht_oper_ie + 2);
3777 if (vht_oper && !ht_oper) {
3778 vht_oper = NULL;
3779 sdata_info(sdata,
3780 "AP advertised VHT without HT, disabling both\n");
3781 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3782 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3783 }
3784
3785 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3786 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3787 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3788 vht_oper = NULL;
3789 }
3790 }
3791
3792 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3793 cbss->channel,
3794 ht_oper, vht_oper,
3795 &chandef, true);
3796
3797 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3798 local->rx_chains);
3799
3800 rcu_read_unlock();
3801
3802 /* will change later if needed */
3803 sdata->smps_mode = IEEE80211_SMPS_OFF;
3804
3805 /*
3806 * If this fails (possibly due to channel context sharing
3807 * on incompatible channels, e.g. 80+80 and 160 sharing the
3808 * same control channel) try to use a smaller bandwidth.
3809 */
3810 ret = ieee80211_vif_use_channel(sdata, &chandef,
3811 IEEE80211_CHANCTX_SHARED);
3812 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3813 ifmgd->flags |= chandef_downgrade(&chandef);
3814 ret = ieee80211_vif_use_channel(sdata, &chandef,
3815 IEEE80211_CHANCTX_SHARED);
3816 }
3817 return ret;
3818 }
3819
3820 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3821 struct cfg80211_bss *cbss, bool assoc)
3822 {
3823 struct ieee80211_local *local = sdata->local;
3824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3825 struct ieee80211_bss *bss = (void *)cbss->priv;
3826 struct sta_info *new_sta = NULL;
3827 bool have_sta = false;
3828 int err;
3829
3830 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3831 return -EINVAL;
3832
3833 if (assoc) {
3834 rcu_read_lock();
3835 have_sta = sta_info_get(sdata, cbss->bssid);
3836 rcu_read_unlock();
3837 }
3838
3839 if (!have_sta) {
3840 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3841 if (!new_sta)
3842 return -ENOMEM;
3843 }
3844
3845 if (new_sta) {
3846 u32 rates = 0, basic_rates = 0;
3847 bool have_higher_than_11mbit;
3848 int min_rate = INT_MAX, min_rate_index = -1;
3849 struct ieee80211_supported_band *sband;
3850 const struct cfg80211_bss_ies *ies;
3851
3852 sband = local->hw.wiphy->bands[cbss->channel->band];
3853
3854 err = ieee80211_prep_channel(sdata, cbss);
3855 if (err) {
3856 sta_info_free(local, new_sta);
3857 return err;
3858 }
3859
3860 ieee80211_get_rates(sband, bss->supp_rates,
3861 bss->supp_rates_len,
3862 &rates, &basic_rates,
3863 &have_higher_than_11mbit,
3864 &min_rate, &min_rate_index);
3865
3866 /*
3867 * This used to be a workaround for basic rates missing
3868 * in the association response frame. Now that we no
3869 * longer use the basic rates from there, it probably
3870 * doesn't happen any more, but keep the workaround so
3871 * in case some *other* APs are buggy in different ways
3872 * we can connect -- with a warning.
3873 */
3874 if (!basic_rates && min_rate_index >= 0) {
3875 sdata_info(sdata,
3876 "No basic rates, using min rate instead\n");
3877 basic_rates = BIT(min_rate_index);
3878 }
3879
3880 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3881 sdata->vif.bss_conf.basic_rates = basic_rates;
3882
3883 /* cf. IEEE 802.11 9.2.12 */
3884 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3885 have_higher_than_11mbit)
3886 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3887 else
3888 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3889
3890 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3891
3892 /* set timing information */
3893 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3894 rcu_read_lock();
3895 ies = rcu_dereference(cbss->beacon_ies);
3896 if (ies) {
3897 const u8 *tim_ie;
3898
3899 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3900 sdata->vif.bss_conf.sync_device_ts =
3901 bss->device_ts_beacon;
3902 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3903 ies->data, ies->len);
3904 if (tim_ie && tim_ie[1] >= 2)
3905 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3906 else
3907 sdata->vif.bss_conf.sync_dtim_count = 0;
3908 } else if (!(local->hw.flags &
3909 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3910 ies = rcu_dereference(cbss->proberesp_ies);
3911 /* must be non-NULL since beacon IEs were NULL */
3912 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3913 sdata->vif.bss_conf.sync_device_ts =
3914 bss->device_ts_presp;
3915 sdata->vif.bss_conf.sync_dtim_count = 0;
3916 } else {
3917 sdata->vif.bss_conf.sync_tsf = 0;
3918 sdata->vif.bss_conf.sync_device_ts = 0;
3919 sdata->vif.bss_conf.sync_dtim_count = 0;
3920 }
3921 rcu_read_unlock();
3922
3923 /* tell driver about BSSID, basic rates and timing */
3924 ieee80211_bss_info_change_notify(sdata,
3925 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3926 BSS_CHANGED_BEACON_INT);
3927
3928 if (assoc)
3929 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3930
3931 err = sta_info_insert(new_sta);
3932 new_sta = NULL;
3933 if (err) {
3934 sdata_info(sdata,
3935 "failed to insert STA entry for the AP (error %d)\n",
3936 err);
3937 return err;
3938 }
3939 } else
3940 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3941
3942 return 0;
3943 }
3944
3945 /* config hooks */
3946 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3947 struct cfg80211_auth_request *req)
3948 {
3949 struct ieee80211_local *local = sdata->local;
3950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3951 struct ieee80211_mgd_auth_data *auth_data;
3952 u16 auth_alg;
3953 int err;
3954
3955 /* prepare auth data structure */
3956
3957 switch (req->auth_type) {
3958 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3959 auth_alg = WLAN_AUTH_OPEN;
3960 break;
3961 case NL80211_AUTHTYPE_SHARED_KEY:
3962 if (IS_ERR(local->wep_tx_tfm))
3963 return -EOPNOTSUPP;
3964 auth_alg = WLAN_AUTH_SHARED_KEY;
3965 break;
3966 case NL80211_AUTHTYPE_FT:
3967 auth_alg = WLAN_AUTH_FT;
3968 break;
3969 case NL80211_AUTHTYPE_NETWORK_EAP:
3970 auth_alg = WLAN_AUTH_LEAP;
3971 break;
3972 case NL80211_AUTHTYPE_SAE:
3973 auth_alg = WLAN_AUTH_SAE;
3974 break;
3975 default:
3976 return -EOPNOTSUPP;
3977 }
3978
3979 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3980 req->ie_len, GFP_KERNEL);
3981 if (!auth_data)
3982 return -ENOMEM;
3983
3984 auth_data->bss = req->bss;
3985
3986 if (req->sae_data_len >= 4) {
3987 __le16 *pos = (__le16 *) req->sae_data;
3988 auth_data->sae_trans = le16_to_cpu(pos[0]);
3989 auth_data->sae_status = le16_to_cpu(pos[1]);
3990 memcpy(auth_data->data, req->sae_data + 4,
3991 req->sae_data_len - 4);
3992 auth_data->data_len += req->sae_data_len - 4;
3993 }
3994
3995 if (req->ie && req->ie_len) {
3996 memcpy(&auth_data->data[auth_data->data_len],
3997 req->ie, req->ie_len);
3998 auth_data->data_len += req->ie_len;
3999 }
4000
4001 if (req->key && req->key_len) {
4002 auth_data->key_len = req->key_len;
4003 auth_data->key_idx = req->key_idx;
4004 memcpy(auth_data->key, req->key, req->key_len);
4005 }
4006
4007 auth_data->algorithm = auth_alg;
4008
4009 /* try to authenticate/probe */
4010
4011 mutex_lock(&ifmgd->mtx);
4012
4013 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4014 ifmgd->assoc_data) {
4015 err = -EBUSY;
4016 goto err_free;
4017 }
4018
4019 if (ifmgd->auth_data)
4020 ieee80211_destroy_auth_data(sdata, false);
4021
4022 /* prep auth_data so we don't go into idle on disassoc */
4023 ifmgd->auth_data = auth_data;
4024
4025 if (ifmgd->associated) {
4026 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4027
4028 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4029 WLAN_REASON_UNSPECIFIED,
4030 false, frame_buf);
4031
4032 __cfg80211_send_deauth(sdata->dev, frame_buf,
4033 sizeof(frame_buf));
4034 }
4035
4036 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4037
4038 err = ieee80211_prep_connection(sdata, req->bss, false);
4039 if (err)
4040 goto err_clear;
4041
4042 err = ieee80211_probe_auth(sdata);
4043 if (err) {
4044 sta_info_destroy_addr(sdata, req->bss->bssid);
4045 goto err_clear;
4046 }
4047
4048 /* hold our own reference */
4049 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4050 err = 0;
4051 goto out_unlock;
4052
4053 err_clear:
4054 memset(ifmgd->bssid, 0, ETH_ALEN);
4055 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4056 ifmgd->auth_data = NULL;
4057 err_free:
4058 kfree(auth_data);
4059 out_unlock:
4060 mutex_unlock(&ifmgd->mtx);
4061
4062 return err;
4063 }
4064
4065 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4066 struct cfg80211_assoc_request *req)
4067 {
4068 struct ieee80211_local *local = sdata->local;
4069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4070 struct ieee80211_bss *bss = (void *)req->bss->priv;
4071 struct ieee80211_mgd_assoc_data *assoc_data;
4072 const struct cfg80211_bss_ies *beacon_ies;
4073 struct ieee80211_supported_band *sband;
4074 const u8 *ssidie, *ht_ie, *vht_ie;
4075 int i, err;
4076
4077 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4078 if (!assoc_data)
4079 return -ENOMEM;
4080
4081 rcu_read_lock();
4082 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4083 if (!ssidie) {
4084 rcu_read_unlock();
4085 kfree(assoc_data);
4086 return -EINVAL;
4087 }
4088 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4089 assoc_data->ssid_len = ssidie[1];
4090 rcu_read_unlock();
4091
4092 mutex_lock(&ifmgd->mtx);
4093
4094 if (ifmgd->associated) {
4095 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4096
4097 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4098 WLAN_REASON_UNSPECIFIED,
4099 false, frame_buf);
4100
4101 __cfg80211_send_deauth(sdata->dev, frame_buf,
4102 sizeof(frame_buf));
4103 }
4104
4105 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4106 err = -EBUSY;
4107 goto err_free;
4108 }
4109
4110 if (ifmgd->assoc_data) {
4111 err = -EBUSY;
4112 goto err_free;
4113 }
4114
4115 if (ifmgd->auth_data) {
4116 bool match;
4117
4118 /* keep sta info, bssid if matching */
4119 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4120 ieee80211_destroy_auth_data(sdata, match);
4121 }
4122
4123 /* prepare assoc data */
4124
4125 ifmgd->beacon_crc_valid = false;
4126
4127 /*
4128 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4129 * We still associate in non-HT mode (11a/b/g) if any one of these
4130 * ciphers is configured as pairwise.
4131 * We can set this to true for non-11n hardware, that'll be checked
4132 * separately along with the peer capabilities.
4133 */
4134 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4135 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4136 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4137 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4138 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4139 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4140 netdev_info(sdata->dev,
4141 "disabling HT/VHT due to WEP/TKIP use\n");
4142 }
4143 }
4144
4145 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4146 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4147 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4148 }
4149
4150 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4151 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4152
4153 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4154 sband = local->hw.wiphy->bands[req->bss->channel->band];
4155 if (!sband->ht_cap.ht_supported ||
4156 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4157 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4158 if (!bss->wmm_used)
4159 netdev_info(sdata->dev,
4160 "disabling HT as WMM/QoS is not supported by the AP\n");
4161 }
4162
4163 /* disable VHT if we don't support it or the AP doesn't use WMM */
4164 if (!sband->vht_cap.vht_supported ||
4165 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4166 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4167 if (!bss->wmm_used)
4168 netdev_info(sdata->dev,
4169 "disabling VHT as WMM/QoS is not supported by the AP\n");
4170 }
4171
4172 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4173 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4174 sizeof(ifmgd->ht_capa_mask));
4175
4176 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4177 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4178 sizeof(ifmgd->vht_capa_mask));
4179
4180 if (req->ie && req->ie_len) {
4181 memcpy(assoc_data->ie, req->ie, req->ie_len);
4182 assoc_data->ie_len = req->ie_len;
4183 }
4184
4185 assoc_data->bss = req->bss;
4186
4187 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4188 if (ifmgd->powersave)
4189 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4190 else
4191 sdata->smps_mode = IEEE80211_SMPS_OFF;
4192 } else
4193 sdata->smps_mode = ifmgd->req_smps;
4194
4195 assoc_data->capability = req->bss->capability;
4196 assoc_data->wmm = bss->wmm_used &&
4197 (local->hw.queues >= IEEE80211_NUM_ACS);
4198 assoc_data->supp_rates = bss->supp_rates;
4199 assoc_data->supp_rates_len = bss->supp_rates_len;
4200
4201 rcu_read_lock();
4202 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4203 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4204 assoc_data->ap_ht_param =
4205 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4206 else
4207 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4208 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4209 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4210 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4211 sizeof(struct ieee80211_vht_cap));
4212 else
4213 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4214 rcu_read_unlock();
4215
4216 if (bss->wmm_used && bss->uapsd_supported &&
4217 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4218 sdata->wmm_acm != 0xff) {
4219 assoc_data->uapsd = true;
4220 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4221 } else {
4222 assoc_data->uapsd = false;
4223 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4224 }
4225
4226 if (req->prev_bssid)
4227 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4228
4229 if (req->use_mfp) {
4230 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4231 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4232 } else {
4233 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4234 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4235 }
4236
4237 if (req->crypto.control_port)
4238 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4239 else
4240 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4241
4242 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4243 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4244
4245 /* kick off associate process */
4246
4247 ifmgd->assoc_data = assoc_data;
4248 ifmgd->dtim_period = 0;
4249
4250 err = ieee80211_prep_connection(sdata, req->bss, true);
4251 if (err)
4252 goto err_clear;
4253
4254 rcu_read_lock();
4255 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4256
4257 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4258 !beacon_ies) {
4259 /*
4260 * Wait up to one beacon interval ...
4261 * should this be more if we miss one?
4262 */
4263 sdata_info(sdata, "waiting for beacon from %pM\n",
4264 ifmgd->bssid);
4265 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4266 assoc_data->timeout_started = true;
4267 assoc_data->need_beacon = true;
4268 } else if (beacon_ies) {
4269 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4270 beacon_ies->data,
4271 beacon_ies->len);
4272 u8 dtim_count = 0;
4273
4274 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4275 const struct ieee80211_tim_ie *tim;
4276 tim = (void *)(tim_ie + 2);
4277 ifmgd->dtim_period = tim->dtim_period;
4278 dtim_count = tim->dtim_count;
4279 }
4280 assoc_data->have_beacon = true;
4281 assoc_data->timeout = jiffies;
4282 assoc_data->timeout_started = true;
4283
4284 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4285 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4286 sdata->vif.bss_conf.sync_device_ts =
4287 bss->device_ts_beacon;
4288 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4289 }
4290 } else {
4291 assoc_data->timeout = jiffies;
4292 assoc_data->timeout_started = true;
4293 }
4294 rcu_read_unlock();
4295
4296 run_again(ifmgd, assoc_data->timeout);
4297
4298 if (bss->corrupt_data) {
4299 char *corrupt_type = "data";
4300 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4301 if (bss->corrupt_data &
4302 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4303 corrupt_type = "beacon and probe response";
4304 else
4305 corrupt_type = "beacon";
4306 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4307 corrupt_type = "probe response";
4308 sdata_info(sdata, "associating with AP with corrupt %s\n",
4309 corrupt_type);
4310 }
4311
4312 err = 0;
4313 goto out;
4314 err_clear:
4315 memset(ifmgd->bssid, 0, ETH_ALEN);
4316 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4317 ifmgd->assoc_data = NULL;
4318 err_free:
4319 kfree(assoc_data);
4320 out:
4321 mutex_unlock(&ifmgd->mtx);
4322
4323 return err;
4324 }
4325
4326 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4327 struct cfg80211_deauth_request *req)
4328 {
4329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4330 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4331 bool tx = !req->local_state_change;
4332 bool sent_frame = false;
4333
4334 mutex_lock(&ifmgd->mtx);
4335
4336 sdata_info(sdata,
4337 "deauthenticating from %pM by local choice (reason=%d)\n",
4338 req->bssid, req->reason_code);
4339
4340 if (ifmgd->auth_data) {
4341 drv_mgd_prepare_tx(sdata->local, sdata);
4342 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4343 IEEE80211_STYPE_DEAUTH,
4344 req->reason_code, tx,
4345 frame_buf);
4346 ieee80211_destroy_auth_data(sdata, false);
4347 mutex_unlock(&ifmgd->mtx);
4348
4349 sent_frame = tx;
4350 goto out;
4351 }
4352
4353 if (ifmgd->associated &&
4354 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4355 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4356 req->reason_code, tx, frame_buf);
4357 sent_frame = tx;
4358 }
4359 mutex_unlock(&ifmgd->mtx);
4360
4361 out:
4362 if (sent_frame)
4363 __cfg80211_send_deauth(sdata->dev, frame_buf,
4364 IEEE80211_DEAUTH_FRAME_LEN);
4365
4366 return 0;
4367 }
4368
4369 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4370 struct cfg80211_disassoc_request *req)
4371 {
4372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4373 u8 bssid[ETH_ALEN];
4374 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4375
4376 mutex_lock(&ifmgd->mtx);
4377
4378 /*
4379 * cfg80211 should catch this ... but it's racy since
4380 * we can receive a disassoc frame, process it, hand it
4381 * to cfg80211 while that's in a locked section already
4382 * trying to tell us that the user wants to disconnect.
4383 */
4384 if (ifmgd->associated != req->bss) {
4385 mutex_unlock(&ifmgd->mtx);
4386 return -ENOLINK;
4387 }
4388
4389 sdata_info(sdata,
4390 "disassociating from %pM by local choice (reason=%d)\n",
4391 req->bss->bssid, req->reason_code);
4392
4393 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4394 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4395 req->reason_code, !req->local_state_change,
4396 frame_buf);
4397 mutex_unlock(&ifmgd->mtx);
4398
4399 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4400 IEEE80211_DEAUTH_FRAME_LEN);
4401
4402 return 0;
4403 }
4404
4405 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4406 {
4407 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4408
4409 /*
4410 * Make sure some work items will not run after this,
4411 * they will not do anything but might not have been
4412 * cancelled when disconnecting.
4413 */
4414 cancel_work_sync(&ifmgd->monitor_work);
4415 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4416 cancel_work_sync(&ifmgd->request_smps_work);
4417 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4418 cancel_work_sync(&ifmgd->chswitch_work);
4419
4420 mutex_lock(&ifmgd->mtx);
4421 if (ifmgd->assoc_data)
4422 ieee80211_destroy_assoc_data(sdata, false);
4423 if (ifmgd->auth_data)
4424 ieee80211_destroy_auth_data(sdata, false);
4425 del_timer_sync(&ifmgd->timer);
4426 mutex_unlock(&ifmgd->mtx);
4427 }
4428
4429 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4430 enum nl80211_cqm_rssi_threshold_event rssi_event,
4431 gfp_t gfp)
4432 {
4433 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4434
4435 trace_api_cqm_rssi_notify(sdata, rssi_event);
4436
4437 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4438 }
4439 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
kernel source for telekom puls (alcatel/mediatek)