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cfg80211/mac80211: use reduced txpower for 5 and 10 MHz
[linux-2.6.git] / net / mac80211 / mlme.c
blob211246b4681927d74967ee9234076e436c9e7f8b
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
50
51 /*
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
58 */
59 static int beacon_loss_count = 7;
60 module_param(beacon_loss_count, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
63
64 /*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
69 /*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
74 static int probe_wait_ms = 500;
75 module_param(probe_wait_ms, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
79
80 /*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
87 /*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
92
93 /*
94 * We can have multiple work items (and connection probing)
95 * scheduling this timer, but we need to take care to only
96 * reschedule it when it should fire _earlier_ than it was
97 * asked for before, or if it's not pending right now. This
98 * function ensures that. Note that it then is required to
99 * run this function for all timeouts after the first one
100 * has happened -- the work that runs from this timer will
101 * do that.
102 */
103 static void run_again(struct ieee80211_sub_if_data *sdata,
104 unsigned long timeout)
105 {
106 sdata_assert_lock(sdata);
107
108 if (!timer_pending(&sdata->u.mgd.timer) ||
109 time_before(timeout, sdata->u.mgd.timer.expires))
110 mod_timer(&sdata->u.mgd.timer, timeout);
111 }
112
113 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
114 {
115 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
116 return;
117
118 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
119 return;
120
121 mod_timer(&sdata->u.mgd.bcn_mon_timer,
122 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
123 }
124
125 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
126 {
127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
128
129 if (unlikely(!sdata->u.mgd.associated))
130 return;
131
132 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133 return;
134
135 mod_timer(&sdata->u.mgd.conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137
138 ifmgd->probe_send_count = 0;
139 }
140
141 static int ecw2cw(int ecw)
142 {
143 return (1 << ecw) - 1;
144 }
145
146 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
147 {
148 u32 ret;
149 int tmp;
150
151 switch (c->width) {
152 case NL80211_CHAN_WIDTH_20:
153 c->width = NL80211_CHAN_WIDTH_20_NOHT;
154 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
155 break;
156 case NL80211_CHAN_WIDTH_40:
157 c->width = NL80211_CHAN_WIDTH_20;
158 c->center_freq1 = c->chan->center_freq;
159 ret = IEEE80211_STA_DISABLE_40MHZ |
160 IEEE80211_STA_DISABLE_VHT;
161 break;
162 case NL80211_CHAN_WIDTH_80:
163 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
164 /* n_P40 */
165 tmp /= 2;
166 /* freq_P40 */
167 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
168 c->width = NL80211_CHAN_WIDTH_40;
169 ret = IEEE80211_STA_DISABLE_VHT;
170 break;
171 case NL80211_CHAN_WIDTH_80P80:
172 c->center_freq2 = 0;
173 c->width = NL80211_CHAN_WIDTH_80;
174 ret = IEEE80211_STA_DISABLE_80P80MHZ |
175 IEEE80211_STA_DISABLE_160MHZ;
176 break;
177 case NL80211_CHAN_WIDTH_160:
178 /* n_P20 */
179 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
180 /* n_P80 */
181 tmp /= 4;
182 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
183 c->width = NL80211_CHAN_WIDTH_80;
184 ret = IEEE80211_STA_DISABLE_80P80MHZ |
185 IEEE80211_STA_DISABLE_160MHZ;
186 break;
187 default:
188 case NL80211_CHAN_WIDTH_20_NOHT:
189 WARN_ON_ONCE(1);
190 c->width = NL80211_CHAN_WIDTH_20_NOHT;
191 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
192 break;
193 case NL80211_CHAN_WIDTH_5:
194 case NL80211_CHAN_WIDTH_10:
195 WARN_ON_ONCE(1);
196 /* keep c->width */
197 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
198 break;
199 }
200
201 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
202
203 return ret;
204 }
205
206 static u32
207 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
208 struct ieee80211_supported_band *sband,
209 struct ieee80211_channel *channel,
210 const struct ieee80211_ht_operation *ht_oper,
211 const struct ieee80211_vht_operation *vht_oper,
212 struct cfg80211_chan_def *chandef, bool verbose)
213 {
214 struct cfg80211_chan_def vht_chandef;
215 u32 ht_cfreq, ret;
216
217 chandef->chan = channel;
218 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
219 chandef->center_freq1 = channel->center_freq;
220 chandef->center_freq2 = 0;
221
222 if (!ht_oper || !sband->ht_cap.ht_supported) {
223 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
224 goto out;
225 }
226
227 chandef->width = NL80211_CHAN_WIDTH_20;
228
229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
230 channel->band);
231 /* check that channel matches the right operating channel */
232 if (channel->center_freq != ht_cfreq) {
233 /*
234 * It's possible that some APs are confused here;
235 * Netgear WNDR3700 sometimes reports 4 higher than
236 * the actual channel in association responses, but
237 * since we look at probe response/beacon data here
238 * it should be OK.
239 */
240 if (verbose)
241 sdata_info(sdata,
242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
243 channel->center_freq, ht_cfreq,
244 ht_oper->primary_chan, channel->band);
245 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
246 goto out;
247 }
248
249 /* check 40 MHz support, if we have it */
250 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
251 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
252 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
253 chandef->width = NL80211_CHAN_WIDTH_40;
254 chandef->center_freq1 += 10;
255 break;
256 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
257 chandef->width = NL80211_CHAN_WIDTH_40;
258 chandef->center_freq1 -= 10;
259 break;
260 }
261 } else {
262 /* 40 MHz (and 80 MHz) must be supported for VHT */
263 ret = IEEE80211_STA_DISABLE_VHT;
264 /* also mark 40 MHz disabled */
265 ret |= IEEE80211_STA_DISABLE_40MHZ;
266 goto out;
267 }
268
269 if (!vht_oper || !sband->vht_cap.vht_supported) {
270 ret = IEEE80211_STA_DISABLE_VHT;
271 goto out;
272 }
273
274 vht_chandef.chan = channel;
275 vht_chandef.center_freq1 =
276 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
277 channel->band);
278 vht_chandef.center_freq2 = 0;
279
280 switch (vht_oper->chan_width) {
281 case IEEE80211_VHT_CHANWIDTH_USE_HT:
282 vht_chandef.width = chandef->width;
283 break;
284 case IEEE80211_VHT_CHANWIDTH_80MHZ:
285 vht_chandef.width = NL80211_CHAN_WIDTH_80;
286 break;
287 case IEEE80211_VHT_CHANWIDTH_160MHZ:
288 vht_chandef.width = NL80211_CHAN_WIDTH_160;
289 break;
290 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
291 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
292 vht_chandef.center_freq2 =
293 ieee80211_channel_to_frequency(
294 vht_oper->center_freq_seg2_idx,
295 channel->band);
296 break;
297 default:
298 if (verbose)
299 sdata_info(sdata,
300 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
301 vht_oper->chan_width);
302 ret = IEEE80211_STA_DISABLE_VHT;
303 goto out;
304 }
305
306 if (!cfg80211_chandef_valid(&vht_chandef)) {
307 if (verbose)
308 sdata_info(sdata,
309 "AP VHT information is invalid, disable VHT\n");
310 ret = IEEE80211_STA_DISABLE_VHT;
311 goto out;
312 }
313
314 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
315 ret = 0;
316 goto out;
317 }
318
319 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
320 if (verbose)
321 sdata_info(sdata,
322 "AP VHT information doesn't match HT, disable VHT\n");
323 ret = IEEE80211_STA_DISABLE_VHT;
324 goto out;
325 }
326
327 *chandef = vht_chandef;
328
329 ret = 0;
330
331 out:
332 /* don't print the message below for VHT mismatch if VHT is disabled */
333 if (ret & IEEE80211_STA_DISABLE_VHT)
334 vht_chandef = *chandef;
335
336 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
337 IEEE80211_CHAN_DISABLED)) {
338 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
339 ret = IEEE80211_STA_DISABLE_HT |
340 IEEE80211_STA_DISABLE_VHT;
341 goto out;
342 }
343
344 ret |= chandef_downgrade(chandef);
345 }
346
347 if (chandef->width != vht_chandef.width && verbose)
348 sdata_info(sdata,
349 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
350
351 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
352 return ret;
353 }
354
355 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
356 struct sta_info *sta,
357 const struct ieee80211_ht_operation *ht_oper,
358 const struct ieee80211_vht_operation *vht_oper,
359 const u8 *bssid, u32 *changed)
360 {
361 struct ieee80211_local *local = sdata->local;
362 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
363 struct ieee80211_supported_band *sband;
364 struct ieee80211_channel *chan;
365 struct cfg80211_chan_def chandef;
366 u16 ht_opmode;
367 u32 flags;
368 enum ieee80211_sta_rx_bandwidth new_sta_bw;
369 int ret;
370
371 /* if HT was/is disabled, don't track any bandwidth changes */
372 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
373 return 0;
374
375 /* don't check VHT if we associated as non-VHT station */
376 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
377 vht_oper = NULL;
378
379 if (WARN_ON_ONCE(!sta))
380 return -EINVAL;
381
382 chan = sdata->vif.bss_conf.chandef.chan;
383 sband = local->hw.wiphy->bands[chan->band];
384
385 /* calculate new channel (type) based on HT/VHT operation IEs */
386 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
387 vht_oper, &chandef, false);
388
389 /*
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
395 */
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
397 chandef.width == NL80211_CHAN_WIDTH_80P80)
398 flags |= chandef_downgrade(&chandef);
399 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
400 chandef.width == NL80211_CHAN_WIDTH_160)
401 flags |= chandef_downgrade(&chandef);
402 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
403 chandef.width > NL80211_CHAN_WIDTH_20)
404 flags |= chandef_downgrade(&chandef);
405
406 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
407 return 0;
408
409 sdata_info(sdata,
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
412 chandef.center_freq1, chandef.center_freq2);
413
414 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
415 IEEE80211_STA_DISABLE_VHT |
416 IEEE80211_STA_DISABLE_40MHZ |
417 IEEE80211_STA_DISABLE_80P80MHZ |
418 IEEE80211_STA_DISABLE_160MHZ)) ||
419 !cfg80211_chandef_valid(&chandef)) {
420 sdata_info(sdata,
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
422 ifmgd->bssid);
423 return -EINVAL;
424 }
425
426 switch (chandef.width) {
427 case NL80211_CHAN_WIDTH_20_NOHT:
428 case NL80211_CHAN_WIDTH_20:
429 new_sta_bw = IEEE80211_STA_RX_BW_20;
430 break;
431 case NL80211_CHAN_WIDTH_40:
432 new_sta_bw = IEEE80211_STA_RX_BW_40;
433 break;
434 case NL80211_CHAN_WIDTH_80:
435 new_sta_bw = IEEE80211_STA_RX_BW_80;
436 break;
437 case NL80211_CHAN_WIDTH_80P80:
438 case NL80211_CHAN_WIDTH_160:
439 new_sta_bw = IEEE80211_STA_RX_BW_160;
440 break;
441 default:
442 return -EINVAL;
443 }
444
445 if (new_sta_bw > sta->cur_max_bandwidth)
446 new_sta_bw = sta->cur_max_bandwidth;
447
448 if (new_sta_bw < sta->sta.bandwidth) {
449 sta->sta.bandwidth = new_sta_bw;
450 rate_control_rate_update(local, sband, sta,
451 IEEE80211_RC_BW_CHANGED);
452 }
453
454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
455 if (ret) {
456 sdata_info(sdata,
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
458 ifmgd->bssid);
459 return ret;
460 }
461
462 if (new_sta_bw > sta->sta.bandwidth) {
463 sta->sta.bandwidth = new_sta_bw;
464 rate_control_rate_update(local, sband, sta,
465 IEEE80211_RC_BW_CHANGED);
466 }
467
468 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
469
470 /* if bss configuration changed store the new one */
471 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
472 *changed |= BSS_CHANGED_HT;
473 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
474 }
475
476 return 0;
477 }
478
479 /* frame sending functions */
480
481 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
482 struct sk_buff *skb, u8 ap_ht_param,
483 struct ieee80211_supported_band *sband,
484 struct ieee80211_channel *channel,
485 enum ieee80211_smps_mode smps)
486 {
487 u8 *pos;
488 u32 flags = channel->flags;
489 u16 cap;
490 struct ieee80211_sta_ht_cap ht_cap;
491
492 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
493
494 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
495 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
496
497 /* determine capability flags */
498 cap = ht_cap.cap;
499
500 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
501 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
502 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
503 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
504 cap &= ~IEEE80211_HT_CAP_SGI_40;
505 }
506 break;
507 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
508 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
509 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
510 cap &= ~IEEE80211_HT_CAP_SGI_40;
511 }
512 break;
513 }
514
515 /*
516 * If 40 MHz was disabled associate as though we weren't
517 * capable of 40 MHz -- some broken APs will never fall
518 * back to trying to transmit in 20 MHz.
519 */
520 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
521 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
522 cap &= ~IEEE80211_HT_CAP_SGI_40;
523 }
524
525 /* set SM PS mode properly */
526 cap &= ~IEEE80211_HT_CAP_SM_PS;
527 switch (smps) {
528 case IEEE80211_SMPS_AUTOMATIC:
529 case IEEE80211_SMPS_NUM_MODES:
530 WARN_ON(1);
531 case IEEE80211_SMPS_OFF:
532 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
533 IEEE80211_HT_CAP_SM_PS_SHIFT;
534 break;
535 case IEEE80211_SMPS_STATIC:
536 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
537 IEEE80211_HT_CAP_SM_PS_SHIFT;
538 break;
539 case IEEE80211_SMPS_DYNAMIC:
540 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
541 IEEE80211_HT_CAP_SM_PS_SHIFT;
542 break;
543 }
544
545 /* reserve and fill IE */
546 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
547 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
548 }
549
550 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
551 struct sk_buff *skb,
552 struct ieee80211_supported_band *sband,
553 struct ieee80211_vht_cap *ap_vht_cap)
554 {
555 u8 *pos;
556 u32 cap;
557 struct ieee80211_sta_vht_cap vht_cap;
558
559 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
560
561 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
562 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
563
564 /* determine capability flags */
565 cap = vht_cap.cap;
566
567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
569 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
570 }
571
572 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
573 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
574 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
575 }
576
577 /*
578 * Some APs apparently get confused if our capabilities are better
579 * than theirs, so restrict what we advertise in the assoc request.
580 */
581 if (!(ap_vht_cap->vht_cap_info &
582 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
583 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
584
585 /* reserve and fill IE */
586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
588 }
589
590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
591 {
592 struct ieee80211_local *local = sdata->local;
593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
595 struct sk_buff *skb;
596 struct ieee80211_mgmt *mgmt;
597 u8 *pos, qos_info;
598 size_t offset = 0, noffset;
599 int i, count, rates_len, supp_rates_len, shift;
600 u16 capab;
601 struct ieee80211_supported_band *sband;
602 struct ieee80211_chanctx_conf *chanctx_conf;
603 struct ieee80211_channel *chan;
604 u32 rate_flags, rates = 0;
605
606 sdata_assert_lock(sdata);
607
608 rcu_read_lock();
609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
610 if (WARN_ON(!chanctx_conf)) {
611 rcu_read_unlock();
612 return;
613 }
614 chan = chanctx_conf->def.chan;
615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
616 rcu_read_unlock();
617 sband = local->hw.wiphy->bands[chan->band];
618 shift = ieee80211_vif_get_shift(&sdata->vif);
619
620 if (assoc_data->supp_rates_len) {
621 /*
622 * Get all rates supported by the device and the AP as
623 * some APs don't like getting a superset of their rates
624 * in the association request (e.g. D-Link DAP 1353 in
625 * b-only mode)...
626 */
627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
628 assoc_data->supp_rates,
629 assoc_data->supp_rates_len,
630 &rates);
631 } else {
632 /*
633 * In case AP not provide any supported rates information
634 * before association, we send information element(s) with
635 * all rates that we support.
636 */
637 rates_len = 0;
638 for (i = 0; i < sband->n_bitrates; i++) {
639 if ((rate_flags & sband->bitrates[i].flags)
640 != rate_flags)
641 continue;
642 rates |= BIT(i);
643 rates_len++;
644 }
645 }
646
647 skb = alloc_skb(local->hw.extra_tx_headroom +
648 sizeof(*mgmt) + /* bit too much but doesn't matter */
649 2 + assoc_data->ssid_len + /* SSID */
650 4 + rates_len + /* (extended) rates */
651 4 + /* power capability */
652 2 + 2 * sband->n_channels + /* supported channels */
653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
655 assoc_data->ie_len + /* extra IEs */
656 9, /* WMM */
657 GFP_KERNEL);
658 if (!skb)
659 return;
660
661 skb_reserve(skb, local->hw.extra_tx_headroom);
662
663 capab = WLAN_CAPABILITY_ESS;
664
665 if (sband->band == IEEE80211_BAND_2GHZ) {
666 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
668 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
669 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
670 }
671
672 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
673 capab |= WLAN_CAPABILITY_PRIVACY;
674
675 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
676 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
677 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
678
679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
740 }
741 }
742 }
743
744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
745 /* 1. power capabilities */
746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
752
753 /* 2. supported channels */
754 /* TODO: get this in reg domain format */
755 pos = skb_put(skb, 2 * sband->n_channels + 2);
756 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
757 *pos++ = 2 * sband->n_channels;
758 for (i = 0; i < sband->n_channels; i++) {
759 *pos++ = ieee80211_frequency_to_channel(
760 sband->channels[i].center_freq);
761 *pos++ = 1; /* one channel in the subband*/
762 }
763 }
764
765 /* if present, add any custom IEs that go before HT */
766 if (assoc_data->ie_len && assoc_data->ie) {
767 static const u8 before_ht[] = {
768 WLAN_EID_SSID,
769 WLAN_EID_SUPP_RATES,
770 WLAN_EID_EXT_SUPP_RATES,
771 WLAN_EID_PWR_CAPABILITY,
772 WLAN_EID_SUPPORTED_CHANNELS,
773 WLAN_EID_RSN,
774 WLAN_EID_QOS_CAPA,
775 WLAN_EID_RRM_ENABLED_CAPABILITIES,
776 WLAN_EID_MOBILITY_DOMAIN,
777 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
778 };
779 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
780 before_ht, ARRAY_SIZE(before_ht),
781 offset);
782 pos = skb_put(skb, noffset - offset);
783 memcpy(pos, assoc_data->ie + offset, noffset - offset);
784 offset = noffset;
785 }
786
787 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
788 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
789 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
790
791 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
792 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
793 sband, chan, sdata->smps_mode);
794
795 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
796 ieee80211_add_vht_ie(sdata, skb, sband,
797 &assoc_data->ap_vht_cap);
798
799 /* if present, add any custom non-vendor IEs that go after HT */
800 if (assoc_data->ie_len && assoc_data->ie) {
801 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
802 assoc_data->ie_len,
803 offset);
804 pos = skb_put(skb, noffset - offset);
805 memcpy(pos, assoc_data->ie + offset, noffset - offset);
806 offset = noffset;
807 }
808
809 if (assoc_data->wmm) {
810 if (assoc_data->uapsd) {
811 qos_info = ifmgd->uapsd_queues;
812 qos_info |= (ifmgd->uapsd_max_sp_len <<
813 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
814 } else {
815 qos_info = 0;
816 }
817
818 pos = skb_put(skb, 9);
819 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
820 *pos++ = 7; /* len */
821 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
822 *pos++ = 0x50;
823 *pos++ = 0xf2;
824 *pos++ = 2; /* WME */
825 *pos++ = 0; /* WME info */
826 *pos++ = 1; /* WME ver */
827 *pos++ = qos_info;
828 }
829
830 /* add any remaining custom (i.e. vendor specific here) IEs */
831 if (assoc_data->ie_len && assoc_data->ie) {
832 noffset = assoc_data->ie_len;
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 }
836
837 drv_mgd_prepare_tx(local, sdata);
838
839 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
840 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
841 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
842 IEEE80211_TX_INTFL_MLME_CONN_TX;
843 ieee80211_tx_skb(sdata, skb);
844 }
845
846 void ieee80211_send_pspoll(struct ieee80211_local *local,
847 struct ieee80211_sub_if_data *sdata)
848 {
849 struct ieee80211_pspoll *pspoll;
850 struct sk_buff *skb;
851
852 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
853 if (!skb)
854 return;
855
856 pspoll = (struct ieee80211_pspoll *) skb->data;
857 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
858
859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
860 ieee80211_tx_skb(sdata, skb);
861 }
862
863 void ieee80211_send_nullfunc(struct ieee80211_local *local,
864 struct ieee80211_sub_if_data *sdata,
865 int powersave)
866 {
867 struct sk_buff *skb;
868 struct ieee80211_hdr_3addr *nullfunc;
869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
870
871 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
872 if (!skb)
873 return;
874
875 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
876 if (powersave)
877 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
878
879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
880 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
881
882 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
883 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
884
885 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
886 IEEE80211_STA_CONNECTION_POLL))
887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
888
889 ieee80211_tx_skb(sdata, skb);
890 }
891
892 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
893 struct ieee80211_sub_if_data *sdata)
894 {
895 struct sk_buff *skb;
896 struct ieee80211_hdr *nullfunc;
897 __le16 fc;
898
899 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
900 return;
901
902 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
903 if (!skb)
904 return;
905
906 skb_reserve(skb, local->hw.extra_tx_headroom);
907
908 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
909 memset(nullfunc, 0, 30);
910 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
911 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
912 nullfunc->frame_control = fc;
913 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
914 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
915 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
916 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
917
918 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
919 ieee80211_tx_skb(sdata, skb);
920 }
921
922 /* spectrum management related things */
923 static void ieee80211_chswitch_work(struct work_struct *work)
924 {
925 struct ieee80211_sub_if_data *sdata =
926 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
927 struct ieee80211_local *local = sdata->local;
928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
929
930 if (!ieee80211_sdata_running(sdata))
931 return;
932
933 sdata_lock(sdata);
934 if (!ifmgd->associated)
935 goto out;
936
937 local->_oper_chandef = local->csa_chandef;
938
939 if (!local->ops->channel_switch) {
940 /* call "hw_config" only if doing sw channel switch */
941 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
942 } else {
943 /* update the device channel directly */
944 local->hw.conf.chandef = local->_oper_chandef;
945 }
946
947 /* XXX: shouldn't really modify cfg80211-owned data! */
948 ifmgd->associated->channel = local->_oper_chandef.chan;
949
950 /* XXX: wait for a beacon first? */
951 ieee80211_wake_queues_by_reason(&local->hw,
952 IEEE80211_MAX_QUEUE_MAP,
953 IEEE80211_QUEUE_STOP_REASON_CSA);
954 out:
955 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
956 sdata_unlock(sdata);
957 }
958
959 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
960 {
961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
963
964 trace_api_chswitch_done(sdata, success);
965 if (!success) {
966 sdata_info(sdata,
967 "driver channel switch failed, disconnecting\n");
968 ieee80211_queue_work(&sdata->local->hw,
969 &ifmgd->csa_connection_drop_work);
970 } else {
971 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
972 }
973 }
974 EXPORT_SYMBOL(ieee80211_chswitch_done);
975
976 static void ieee80211_chswitch_timer(unsigned long data)
977 {
978 struct ieee80211_sub_if_data *sdata =
979 (struct ieee80211_sub_if_data *) data;
980
981 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
982 }
983
984 static void
985 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
986 u64 timestamp, struct ieee802_11_elems *elems,
987 bool beacon)
988 {
989 struct ieee80211_local *local = sdata->local;
990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
991 struct cfg80211_bss *cbss = ifmgd->associated;
992 struct ieee80211_bss *bss;
993 struct ieee80211_chanctx *chanctx;
994 enum ieee80211_band new_band;
995 int new_freq;
996 u8 new_chan_no;
997 u8 count;
998 u8 mode;
999 struct ieee80211_channel *new_chan;
1000 struct cfg80211_chan_def new_chandef = {};
1001 struct cfg80211_chan_def new_vht_chandef = {};
1002 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1003 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1004 const struct ieee80211_ht_operation *ht_oper;
1005 int secondary_channel_offset = -1;
1006
1007 sdata_assert_lock(sdata);
1008
1009 if (!cbss)
1010 return;
1011
1012 if (local->scanning)
1013 return;
1014
1015 /* disregard subsequent announcements if we are already processing */
1016 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1017 return;
1018
1019 sec_chan_offs = elems->sec_chan_offs;
1020 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1021 ht_oper = elems->ht_operation;
1022
1023 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1024 IEEE80211_STA_DISABLE_40MHZ)) {
1025 sec_chan_offs = NULL;
1026 wide_bw_chansw_ie = NULL;
1027 /* only used for bandwidth here */
1028 ht_oper = NULL;
1029 }
1030
1031 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1032 wide_bw_chansw_ie = NULL;
1033
1034 if (elems->ext_chansw_ie) {
1035 if (!ieee80211_operating_class_to_band(
1036 elems->ext_chansw_ie->new_operating_class,
1037 &new_band)) {
1038 sdata_info(sdata,
1039 "cannot understand ECSA IE operating class %d, disconnecting\n",
1040 elems->ext_chansw_ie->new_operating_class);
1041 ieee80211_queue_work(&local->hw,
1042 &ifmgd->csa_connection_drop_work);
1043 }
1044 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1045 count = elems->ext_chansw_ie->count;
1046 mode = elems->ext_chansw_ie->mode;
1047 } else if (elems->ch_switch_ie) {
1048 new_band = cbss->channel->band;
1049 new_chan_no = elems->ch_switch_ie->new_ch_num;
1050 count = elems->ch_switch_ie->count;
1051 mode = elems->ch_switch_ie->mode;
1052 } else {
1053 /* nothing here we understand */
1054 return;
1055 }
1056
1057 bss = (void *)cbss->priv;
1058
1059 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1060 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1061 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1062 sdata_info(sdata,
1063 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1064 ifmgd->associated->bssid, new_freq);
1065 ieee80211_queue_work(&local->hw,
1066 &ifmgd->csa_connection_drop_work);
1067 return;
1068 }
1069
1070 if (!beacon && sec_chan_offs) {
1071 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1072 } else if (beacon && ht_oper) {
1073 secondary_channel_offset =
1074 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1075 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1076 /*
1077 * If it's not a beacon, HT is enabled and the IE not present,
1078 * it's 20 MHz, 802.11-2012 8.5.2.6:
1079 * This element [the Secondary Channel Offset Element] is
1080 * present when switching to a 40 MHz channel. It may be
1081 * present when switching to a 20 MHz channel (in which
1082 * case the secondary channel offset is set to SCN).
1083 */
1084 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1085 }
1086
1087 switch (secondary_channel_offset) {
1088 default:
1089 /* secondary_channel_offset was present but is invalid */
1090 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1091 cfg80211_chandef_create(&new_chandef, new_chan,
1092 NL80211_CHAN_HT20);
1093 break;
1094 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1095 cfg80211_chandef_create(&new_chandef, new_chan,
1096 NL80211_CHAN_HT40PLUS);
1097 break;
1098 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1099 cfg80211_chandef_create(&new_chandef, new_chan,
1100 NL80211_CHAN_HT40MINUS);
1101 break;
1102 case -1:
1103 cfg80211_chandef_create(&new_chandef, new_chan,
1104 NL80211_CHAN_NO_HT);
1105 break;
1106 }
1107
1108 if (wide_bw_chansw_ie) {
1109 new_vht_chandef.chan = new_chan;
1110 new_vht_chandef.center_freq1 =
1111 ieee80211_channel_to_frequency(
1112 wide_bw_chansw_ie->new_center_freq_seg0,
1113 new_band);
1114
1115 switch (wide_bw_chansw_ie->new_channel_width) {
1116 default:
1117 /* hmmm, ignore VHT and use HT if present */
1118 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1119 new_vht_chandef.chan = NULL;
1120 break;
1121 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1122 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1123 break;
1124 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1125 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1126 break;
1127 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1128 /* field is otherwise reserved */
1129 new_vht_chandef.center_freq2 =
1130 ieee80211_channel_to_frequency(
1131 wide_bw_chansw_ie->new_center_freq_seg1,
1132 new_band);
1133 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1134 break;
1135 }
1136 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1137 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1138 chandef_downgrade(&new_vht_chandef);
1139 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1140 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1141 chandef_downgrade(&new_vht_chandef);
1142 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1143 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1144 chandef_downgrade(&new_vht_chandef);
1145 }
1146
1147 /* if VHT data is there validate & use it */
1148 if (new_vht_chandef.chan) {
1149 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1150 &new_chandef)) {
1151 sdata_info(sdata,
1152 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1153 ifmgd->associated->bssid);
1154 ieee80211_queue_work(&local->hw,
1155 &ifmgd->csa_connection_drop_work);
1156 return;
1157 }
1158 new_chandef = new_vht_chandef;
1159 }
1160
1161 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1162 IEEE80211_CHAN_DISABLED)) {
1163 sdata_info(sdata,
1164 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1165 ifmgd->associated->bssid, new_freq,
1166 new_chandef.width, new_chandef.center_freq1,
1167 new_chandef.center_freq2);
1168 ieee80211_queue_work(&local->hw,
1169 &ifmgd->csa_connection_drop_work);
1170 return;
1171 }
1172
1173 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1174
1175 if (local->use_chanctx) {
1176 sdata_info(sdata,
1177 "not handling channel switch with channel contexts\n");
1178 ieee80211_queue_work(&local->hw,
1179 &ifmgd->csa_connection_drop_work);
1180 return;
1181 }
1182
1183 mutex_lock(&local->chanctx_mtx);
1184 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1185 mutex_unlock(&local->chanctx_mtx);
1186 return;
1187 }
1188 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1189 struct ieee80211_chanctx, conf);
1190 if (chanctx->refcount > 1) {
1191 sdata_info(sdata,
1192 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1193 ieee80211_queue_work(&local->hw,
1194 &ifmgd->csa_connection_drop_work);
1195 mutex_unlock(&local->chanctx_mtx);
1196 return;
1197 }
1198 mutex_unlock(&local->chanctx_mtx);
1199
1200 local->csa_chandef = new_chandef;
1201
1202 if (mode)
1203 ieee80211_stop_queues_by_reason(&local->hw,
1204 IEEE80211_MAX_QUEUE_MAP,
1205 IEEE80211_QUEUE_STOP_REASON_CSA);
1206
1207 if (local->ops->channel_switch) {
1208 /* use driver's channel switch callback */
1209 struct ieee80211_channel_switch ch_switch = {
1210 .timestamp = timestamp,
1211 .block_tx = mode,
1212 .chandef = new_chandef,
1213 .count = count,
1214 };
1215
1216 drv_channel_switch(local, &ch_switch);
1217 return;
1218 }
1219
1220 /* channel switch handled in software */
1221 if (count <= 1)
1222 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1223 else
1224 mod_timer(&ifmgd->chswitch_timer,
1225 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1226 }
1227
1228 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1229 struct ieee80211_channel *channel,
1230 const u8 *country_ie, u8 country_ie_len,
1231 const u8 *pwr_constr_elem)
1232 {
1233 struct ieee80211_country_ie_triplet *triplet;
1234 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1235 int i, chan_pwr, chan_increment, new_ap_level;
1236 bool have_chan_pwr = false;
1237
1238 /* Invalid IE */
1239 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1240 return 0;
1241
1242 triplet = (void *)(country_ie + 3);
1243 country_ie_len -= 3;
1244
1245 switch (channel->band) {
1246 default:
1247 WARN_ON_ONCE(1);
1248 /* fall through */
1249 case IEEE80211_BAND_2GHZ:
1250 case IEEE80211_BAND_60GHZ:
1251 chan_increment = 1;
1252 break;
1253 case IEEE80211_BAND_5GHZ:
1254 chan_increment = 4;
1255 break;
1256 }
1257
1258 /* find channel */
1259 while (country_ie_len >= 3) {
1260 u8 first_channel = triplet->chans.first_channel;
1261
1262 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1263 goto next;
1264
1265 for (i = 0; i < triplet->chans.num_channels; i++) {
1266 if (first_channel + i * chan_increment == chan) {
1267 have_chan_pwr = true;
1268 chan_pwr = triplet->chans.max_power;
1269 break;
1270 }
1271 }
1272 if (have_chan_pwr)
1273 break;
1274
1275 next:
1276 triplet++;
1277 country_ie_len -= 3;
1278 }
1279
1280 if (!have_chan_pwr)
1281 return 0;
1282
1283 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1284
1285 if (sdata->ap_power_level == new_ap_level)
1286 return 0;
1287
1288 sdata_info(sdata,
1289 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1290 new_ap_level, chan_pwr, *pwr_constr_elem,
1291 sdata->u.mgd.bssid);
1292 sdata->ap_power_level = new_ap_level;
1293 if (__ieee80211_recalc_txpower(sdata))
1294 return BSS_CHANGED_TXPOWER;
1295 return 0;
1296 }
1297
1298 /* powersave */
1299 static void ieee80211_enable_ps(struct ieee80211_local *local,
1300 struct ieee80211_sub_if_data *sdata)
1301 {
1302 struct ieee80211_conf *conf = &local->hw.conf;
1303
1304 /*
1305 * If we are scanning right now then the parameters will
1306 * take effect when scan finishes.
1307 */
1308 if (local->scanning)
1309 return;
1310
1311 if (conf->dynamic_ps_timeout > 0 &&
1312 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1313 mod_timer(&local->dynamic_ps_timer, jiffies +
1314 msecs_to_jiffies(conf->dynamic_ps_timeout));
1315 } else {
1316 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1317 ieee80211_send_nullfunc(local, sdata, 1);
1318
1319 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1320 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1321 return;
1322
1323 conf->flags |= IEEE80211_CONF_PS;
1324 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1325 }
1326 }
1327
1328 static void ieee80211_change_ps(struct ieee80211_local *local)
1329 {
1330 struct ieee80211_conf *conf = &local->hw.conf;
1331
1332 if (local->ps_sdata) {
1333 ieee80211_enable_ps(local, local->ps_sdata);
1334 } else if (conf->flags & IEEE80211_CONF_PS) {
1335 conf->flags &= ~IEEE80211_CONF_PS;
1336 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1337 del_timer_sync(&local->dynamic_ps_timer);
1338 cancel_work_sync(&local->dynamic_ps_enable_work);
1339 }
1340 }
1341
1342 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1343 {
1344 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1345 struct sta_info *sta = NULL;
1346 bool authorized = false;
1347
1348 if (!mgd->powersave)
1349 return false;
1350
1351 if (mgd->broken_ap)
1352 return false;
1353
1354 if (!mgd->associated)
1355 return false;
1356
1357 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1358 IEEE80211_STA_CONNECTION_POLL))
1359 return false;
1360
1361 if (!mgd->have_beacon)
1362 return false;
1363
1364 rcu_read_lock();
1365 sta = sta_info_get(sdata, mgd->bssid);
1366 if (sta)
1367 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1368 rcu_read_unlock();
1369
1370 return authorized;
1371 }
1372
1373 /* need to hold RTNL or interface lock */
1374 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1375 {
1376 struct ieee80211_sub_if_data *sdata, *found = NULL;
1377 int count = 0;
1378 int timeout;
1379
1380 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1381 local->ps_sdata = NULL;
1382 return;
1383 }
1384
1385 list_for_each_entry(sdata, &local->interfaces, list) {
1386 if (!ieee80211_sdata_running(sdata))
1387 continue;
1388 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1389 /* If an AP vif is found, then disable PS
1390 * by setting the count to zero thereby setting
1391 * ps_sdata to NULL.
1392 */
1393 count = 0;
1394 break;
1395 }
1396 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1397 continue;
1398 found = sdata;
1399 count++;
1400 }
1401
1402 if (count == 1 && ieee80211_powersave_allowed(found)) {
1403 s32 beaconint_us;
1404
1405 if (latency < 0)
1406 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1407
1408 beaconint_us = ieee80211_tu_to_usec(
1409 found->vif.bss_conf.beacon_int);
1410
1411 timeout = local->dynamic_ps_forced_timeout;
1412 if (timeout < 0) {
1413 /*
1414 * Go to full PSM if the user configures a very low
1415 * latency requirement.
1416 * The 2000 second value is there for compatibility
1417 * until the PM_QOS_NETWORK_LATENCY is configured
1418 * with real values.
1419 */
1420 if (latency > (1900 * USEC_PER_MSEC) &&
1421 latency != (2000 * USEC_PER_SEC))
1422 timeout = 0;
1423 else
1424 timeout = 100;
1425 }
1426 local->hw.conf.dynamic_ps_timeout = timeout;
1427
1428 if (beaconint_us > latency) {
1429 local->ps_sdata = NULL;
1430 } else {
1431 int maxslp = 1;
1432 u8 dtimper = found->u.mgd.dtim_period;
1433
1434 /* If the TIM IE is invalid, pretend the value is 1 */
1435 if (!dtimper)
1436 dtimper = 1;
1437 else if (dtimper > 1)
1438 maxslp = min_t(int, dtimper,
1439 latency / beaconint_us);
1440
1441 local->hw.conf.max_sleep_period = maxslp;
1442 local->hw.conf.ps_dtim_period = dtimper;
1443 local->ps_sdata = found;
1444 }
1445 } else {
1446 local->ps_sdata = NULL;
1447 }
1448
1449 ieee80211_change_ps(local);
1450 }
1451
1452 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1453 {
1454 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1455
1456 if (sdata->vif.bss_conf.ps != ps_allowed) {
1457 sdata->vif.bss_conf.ps = ps_allowed;
1458 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1459 }
1460 }
1461
1462 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1463 {
1464 struct ieee80211_local *local =
1465 container_of(work, struct ieee80211_local,
1466 dynamic_ps_disable_work);
1467
1468 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1469 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1470 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1471 }
1472
1473 ieee80211_wake_queues_by_reason(&local->hw,
1474 IEEE80211_MAX_QUEUE_MAP,
1475 IEEE80211_QUEUE_STOP_REASON_PS);
1476 }
1477
1478 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1479 {
1480 struct ieee80211_local *local =
1481 container_of(work, struct ieee80211_local,
1482 dynamic_ps_enable_work);
1483 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1484 struct ieee80211_if_managed *ifmgd;
1485 unsigned long flags;
1486 int q;
1487
1488 /* can only happen when PS was just disabled anyway */
1489 if (!sdata)
1490 return;
1491
1492 ifmgd = &sdata->u.mgd;
1493
1494 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1495 return;
1496
1497 if (local->hw.conf.dynamic_ps_timeout > 0) {
1498 /* don't enter PS if TX frames are pending */
1499 if (drv_tx_frames_pending(local)) {
1500 mod_timer(&local->dynamic_ps_timer, jiffies +
1501 msecs_to_jiffies(
1502 local->hw.conf.dynamic_ps_timeout));
1503 return;
1504 }
1505
1506 /*
1507 * transmission can be stopped by others which leads to
1508 * dynamic_ps_timer expiry. Postpone the ps timer if it
1509 * is not the actual idle state.
1510 */
1511 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1512 for (q = 0; q < local->hw.queues; q++) {
1513 if (local->queue_stop_reasons[q]) {
1514 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1515 flags);
1516 mod_timer(&local->dynamic_ps_timer, jiffies +
1517 msecs_to_jiffies(
1518 local->hw.conf.dynamic_ps_timeout));
1519 return;
1520 }
1521 }
1522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1523 }
1524
1525 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1526 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1527 if (drv_tx_frames_pending(local)) {
1528 mod_timer(&local->dynamic_ps_timer, jiffies +
1529 msecs_to_jiffies(
1530 local->hw.conf.dynamic_ps_timeout));
1531 } else {
1532 ieee80211_send_nullfunc(local, sdata, 1);
1533 /* Flush to get the tx status of nullfunc frame */
1534 ieee80211_flush_queues(local, sdata);
1535 }
1536 }
1537
1538 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1539 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1540 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1541 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1542 local->hw.conf.flags |= IEEE80211_CONF_PS;
1543 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1544 }
1545 }
1546
1547 void ieee80211_dynamic_ps_timer(unsigned long data)
1548 {
1549 struct ieee80211_local *local = (void *) data;
1550
1551 if (local->quiescing || local->suspended)
1552 return;
1553
1554 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1555 }
1556
1557 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1558 {
1559 struct delayed_work *delayed_work =
1560 container_of(work, struct delayed_work, work);
1561 struct ieee80211_sub_if_data *sdata =
1562 container_of(delayed_work, struct ieee80211_sub_if_data,
1563 dfs_cac_timer_work);
1564
1565 ieee80211_vif_release_channel(sdata);
1566
1567 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1568 }
1569
1570 /* MLME */
1571 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1572 struct ieee80211_sub_if_data *sdata,
1573 const u8 *wmm_param, size_t wmm_param_len)
1574 {
1575 struct ieee80211_tx_queue_params params;
1576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1577 size_t left;
1578 int count;
1579 const u8 *pos;
1580 u8 uapsd_queues = 0;
1581
1582 if (!local->ops->conf_tx)
1583 return false;
1584
1585 if (local->hw.queues < IEEE80211_NUM_ACS)
1586 return false;
1587
1588 if (!wmm_param)
1589 return false;
1590
1591 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1592 return false;
1593
1594 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1595 uapsd_queues = ifmgd->uapsd_queues;
1596
1597 count = wmm_param[6] & 0x0f;
1598 if (count == ifmgd->wmm_last_param_set)
1599 return false;
1600 ifmgd->wmm_last_param_set = count;
1601
1602 pos = wmm_param + 8;
1603 left = wmm_param_len - 8;
1604
1605 memset(&params, 0, sizeof(params));
1606
1607 sdata->wmm_acm = 0;
1608 for (; left >= 4; left -= 4, pos += 4) {
1609 int aci = (pos[0] >> 5) & 0x03;
1610 int acm = (pos[0] >> 4) & 0x01;
1611 bool uapsd = false;
1612 int queue;
1613
1614 switch (aci) {
1615 case 1: /* AC_BK */
1616 queue = 3;
1617 if (acm)
1618 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1620 uapsd = true;
1621 break;
1622 case 2: /* AC_VI */
1623 queue = 1;
1624 if (acm)
1625 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1626 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1627 uapsd = true;
1628 break;
1629 case 3: /* AC_VO */
1630 queue = 0;
1631 if (acm)
1632 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1633 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1634 uapsd = true;
1635 break;
1636 case 0: /* AC_BE */
1637 default:
1638 queue = 2;
1639 if (acm)
1640 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1641 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1642 uapsd = true;
1643 break;
1644 }
1645
1646 params.aifs = pos[0] & 0x0f;
1647 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1648 params.cw_min = ecw2cw(pos[1] & 0x0f);
1649 params.txop = get_unaligned_le16(pos + 2);
1650 params.acm = acm;
1651 params.uapsd = uapsd;
1652
1653 mlme_dbg(sdata,
1654 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1655 queue, aci, acm,
1656 params.aifs, params.cw_min, params.cw_max,
1657 params.txop, params.uapsd);
1658 sdata->tx_conf[queue] = params;
1659 if (drv_conf_tx(local, sdata, queue, &params))
1660 sdata_err(sdata,
1661 "failed to set TX queue parameters for queue %d\n",
1662 queue);
1663 }
1664
1665 /* enable WMM or activate new settings */
1666 sdata->vif.bss_conf.qos = true;
1667 return true;
1668 }
1669
1670 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1671 {
1672 lockdep_assert_held(&sdata->local->mtx);
1673
1674 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1675 IEEE80211_STA_BEACON_POLL);
1676 ieee80211_run_deferred_scan(sdata->local);
1677 }
1678
1679 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1680 {
1681 mutex_lock(&sdata->local->mtx);
1682 __ieee80211_stop_poll(sdata);
1683 mutex_unlock(&sdata->local->mtx);
1684 }
1685
1686 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1687 u16 capab, bool erp_valid, u8 erp)
1688 {
1689 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1690 u32 changed = 0;
1691 bool use_protection;
1692 bool use_short_preamble;
1693 bool use_short_slot;
1694
1695 if (erp_valid) {
1696 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1697 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1698 } else {
1699 use_protection = false;
1700 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1701 }
1702
1703 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1704 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1705 use_short_slot = true;
1706
1707 if (use_protection != bss_conf->use_cts_prot) {
1708 bss_conf->use_cts_prot = use_protection;
1709 changed |= BSS_CHANGED_ERP_CTS_PROT;
1710 }
1711
1712 if (use_short_preamble != bss_conf->use_short_preamble) {
1713 bss_conf->use_short_preamble = use_short_preamble;
1714 changed |= BSS_CHANGED_ERP_PREAMBLE;
1715 }
1716
1717 if (use_short_slot != bss_conf->use_short_slot) {
1718 bss_conf->use_short_slot = use_short_slot;
1719 changed |= BSS_CHANGED_ERP_SLOT;
1720 }
1721
1722 return changed;
1723 }
1724
1725 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1726 struct cfg80211_bss *cbss,
1727 u32 bss_info_changed)
1728 {
1729 struct ieee80211_bss *bss = (void *)cbss->priv;
1730 struct ieee80211_local *local = sdata->local;
1731 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1732
1733 bss_info_changed |= BSS_CHANGED_ASSOC;
1734 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1735 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1736
1737 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1738 beacon_loss_count * bss_conf->beacon_int));
1739
1740 sdata->u.mgd.associated = cbss;
1741 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1742
1743 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1744
1745 if (sdata->vif.p2p) {
1746 const struct cfg80211_bss_ies *ies;
1747
1748 rcu_read_lock();
1749 ies = rcu_dereference(cbss->ies);
1750 if (ies) {
1751 int ret;
1752
1753 ret = cfg80211_get_p2p_attr(
1754 ies->data, ies->len,
1755 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1756 (u8 *) &bss_conf->p2p_noa_attr,
1757 sizeof(bss_conf->p2p_noa_attr));
1758 if (ret >= 2) {
1759 sdata->u.mgd.p2p_noa_index =
1760 bss_conf->p2p_noa_attr.index;
1761 bss_info_changed |= BSS_CHANGED_P2P_PS;
1762 }
1763 }
1764 rcu_read_unlock();
1765 }
1766
1767 /* just to be sure */
1768 ieee80211_stop_poll(sdata);
1769
1770 ieee80211_led_assoc(local, 1);
1771
1772 if (sdata->u.mgd.have_beacon) {
1773 /*
1774 * If the AP is buggy we may get here with no DTIM period
1775 * known, so assume it's 1 which is the only safe assumption
1776 * in that case, although if the TIM IE is broken powersave
1777 * probably just won't work at all.
1778 */
1779 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1780 bss_conf->beacon_rate = bss->beacon_rate;
1781 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1782 } else {
1783 bss_conf->beacon_rate = NULL;
1784 bss_conf->dtim_period = 0;
1785 }
1786
1787 bss_conf->assoc = 1;
1788
1789 /* Tell the driver to monitor connection quality (if supported) */
1790 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1791 bss_conf->cqm_rssi_thold)
1792 bss_info_changed |= BSS_CHANGED_CQM;
1793
1794 /* Enable ARP filtering */
1795 if (bss_conf->arp_addr_cnt)
1796 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1797
1798 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1799
1800 mutex_lock(&local->iflist_mtx);
1801 ieee80211_recalc_ps(local, -1);
1802 mutex_unlock(&local->iflist_mtx);
1803
1804 ieee80211_recalc_smps(sdata);
1805 ieee80211_recalc_ps_vif(sdata);
1806
1807 netif_carrier_on(sdata->dev);
1808 }
1809
1810 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1811 u16 stype, u16 reason, bool tx,
1812 u8 *frame_buf)
1813 {
1814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1815 struct ieee80211_local *local = sdata->local;
1816 u32 changed = 0;
1817
1818 sdata_assert_lock(sdata);
1819
1820 if (WARN_ON_ONCE(tx && !frame_buf))
1821 return;
1822
1823 if (WARN_ON(!ifmgd->associated))
1824 return;
1825
1826 ieee80211_stop_poll(sdata);
1827
1828 ifmgd->associated = NULL;
1829 netif_carrier_off(sdata->dev);
1830
1831 /*
1832 * if we want to get out of ps before disassoc (why?) we have
1833 * to do it before sending disassoc, as otherwise the null-packet
1834 * won't be valid.
1835 */
1836 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1837 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1839 }
1840 local->ps_sdata = NULL;
1841
1842 /* disable per-vif ps */
1843 ieee80211_recalc_ps_vif(sdata);
1844
1845 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1846 if (tx)
1847 ieee80211_flush_queues(local, sdata);
1848
1849 /* deauthenticate/disassociate now */
1850 if (tx || frame_buf)
1851 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1852 reason, tx, frame_buf);
1853
1854 /* flush out frame */
1855 if (tx)
1856 ieee80211_flush_queues(local, sdata);
1857
1858 /* clear bssid only after building the needed mgmt frames */
1859 memset(ifmgd->bssid, 0, ETH_ALEN);
1860
1861 /* remove AP and TDLS peers */
1862 sta_info_flush_defer(sdata);
1863
1864 /* finally reset all BSS / config parameters */
1865 changed |= ieee80211_reset_erp_info(sdata);
1866
1867 ieee80211_led_assoc(local, 0);
1868 changed |= BSS_CHANGED_ASSOC;
1869 sdata->vif.bss_conf.assoc = false;
1870
1871 ifmgd->p2p_noa_index = -1;
1872 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1873 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1874
1875 /* on the next assoc, re-program HT/VHT parameters */
1876 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1877 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1878 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1879 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1880
1881 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1882
1883 del_timer_sync(&local->dynamic_ps_timer);
1884 cancel_work_sync(&local->dynamic_ps_enable_work);
1885
1886 /* Disable ARP filtering */
1887 if (sdata->vif.bss_conf.arp_addr_cnt)
1888 changed |= BSS_CHANGED_ARP_FILTER;
1889
1890 sdata->vif.bss_conf.qos = false;
1891 changed |= BSS_CHANGED_QOS;
1892
1893 /* The BSSID (not really interesting) and HT changed */
1894 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1895 ieee80211_bss_info_change_notify(sdata, changed);
1896
1897 /* disassociated - set to defaults now */
1898 ieee80211_set_wmm_default(sdata, false);
1899
1900 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1901 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1902 del_timer_sync(&sdata->u.mgd.timer);
1903 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1904
1905 sdata->vif.bss_conf.dtim_period = 0;
1906 sdata->vif.bss_conf.beacon_rate = NULL;
1907
1908 ifmgd->have_beacon = false;
1909
1910 ifmgd->flags = 0;
1911 ieee80211_vif_release_channel(sdata);
1912 }
1913
1914 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1915 struct ieee80211_hdr *hdr)
1916 {
1917 /*
1918 * We can postpone the mgd.timer whenever receiving unicast frames
1919 * from AP because we know that the connection is working both ways
1920 * at that time. But multicast frames (and hence also beacons) must
1921 * be ignored here, because we need to trigger the timer during
1922 * data idle periods for sending the periodic probe request to the
1923 * AP we're connected to.
1924 */
1925 if (is_multicast_ether_addr(hdr->addr1))
1926 return;
1927
1928 ieee80211_sta_reset_conn_monitor(sdata);
1929 }
1930
1931 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1932 {
1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1934 struct ieee80211_local *local = sdata->local;
1935
1936 mutex_lock(&local->mtx);
1937 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1938 IEEE80211_STA_CONNECTION_POLL))) {
1939 mutex_unlock(&local->mtx);
1940 return;
1941 }
1942
1943 __ieee80211_stop_poll(sdata);
1944
1945 mutex_lock(&local->iflist_mtx);
1946 ieee80211_recalc_ps(local, -1);
1947 mutex_unlock(&local->iflist_mtx);
1948
1949 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1950 goto out;
1951
1952 /*
1953 * We've received a probe response, but are not sure whether
1954 * we have or will be receiving any beacons or data, so let's
1955 * schedule the timers again, just in case.
1956 */
1957 ieee80211_sta_reset_beacon_monitor(sdata);
1958
1959 mod_timer(&ifmgd->conn_mon_timer,
1960 round_jiffies_up(jiffies +
1961 IEEE80211_CONNECTION_IDLE_TIME));
1962 out:
1963 mutex_unlock(&local->mtx);
1964 }
1965
1966 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1967 struct ieee80211_hdr *hdr, bool ack)
1968 {
1969 if (!ieee80211_is_data(hdr->frame_control))
1970 return;
1971
1972 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1973 sdata->u.mgd.probe_send_count > 0) {
1974 if (ack)
1975 ieee80211_sta_reset_conn_monitor(sdata);
1976 else
1977 sdata->u.mgd.nullfunc_failed = true;
1978 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1979 return;
1980 }
1981
1982 if (ack)
1983 ieee80211_sta_reset_conn_monitor(sdata);
1984 }
1985
1986 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1987 {
1988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1989 const u8 *ssid;
1990 u8 *dst = ifmgd->associated->bssid;
1991 u8 unicast_limit = max(1, max_probe_tries - 3);
1992
1993 /*
1994 * Try sending broadcast probe requests for the last three
1995 * probe requests after the first ones failed since some
1996 * buggy APs only support broadcast probe requests.
1997 */
1998 if (ifmgd->probe_send_count >= unicast_limit)
1999 dst = NULL;
2000
2001 /*
2002 * When the hardware reports an accurate Tx ACK status, it's
2003 * better to send a nullfunc frame instead of a probe request,
2004 * as it will kick us off the AP quickly if we aren't associated
2005 * anymore. The timeout will be reset if the frame is ACKed by
2006 * the AP.
2007 */
2008 ifmgd->probe_send_count++;
2009
2010 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2011 ifmgd->nullfunc_failed = false;
2012 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2013 } else {
2014 int ssid_len;
2015
2016 rcu_read_lock();
2017 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2018 if (WARN_ON_ONCE(ssid == NULL))
2019 ssid_len = 0;
2020 else
2021 ssid_len = ssid[1];
2022
2023 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2024 0, (u32) -1, true, 0,
2025 ifmgd->associated->channel, false);
2026 rcu_read_unlock();
2027 }
2028
2029 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2030 run_again(sdata, ifmgd->probe_timeout);
2031 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2032 ieee80211_flush_queues(sdata->local, sdata);
2033 }
2034
2035 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2036 bool beacon)
2037 {
2038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2039 bool already = false;
2040
2041 if (!ieee80211_sdata_running(sdata))
2042 return;
2043
2044 sdata_lock(sdata);
2045
2046 if (!ifmgd->associated)
2047 goto out;
2048
2049 mutex_lock(&sdata->local->mtx);
2050
2051 if (sdata->local->tmp_channel || sdata->local->scanning) {
2052 mutex_unlock(&sdata->local->mtx);
2053 goto out;
2054 }
2055
2056 if (beacon) {
2057 mlme_dbg_ratelimited(sdata,
2058 "detected beacon loss from AP (missed %d beacons) - probing\n",
2059 beacon_loss_count);
2060
2061 ieee80211_cqm_rssi_notify(&sdata->vif,
2062 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2063 GFP_KERNEL);
2064 }
2065
2066 /*
2067 * The driver/our work has already reported this event or the
2068 * connection monitoring has kicked in and we have already sent
2069 * a probe request. Or maybe the AP died and the driver keeps
2070 * reporting until we disassociate...
2071 *
2072 * In either case we have to ignore the current call to this
2073 * function (except for setting the correct probe reason bit)
2074 * because otherwise we would reset the timer every time and
2075 * never check whether we received a probe response!
2076 */
2077 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2078 IEEE80211_STA_CONNECTION_POLL))
2079 already = true;
2080
2081 if (beacon)
2082 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2083 else
2084 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2085
2086 mutex_unlock(&sdata->local->mtx);
2087
2088 if (already)
2089 goto out;
2090
2091 mutex_lock(&sdata->local->iflist_mtx);
2092 ieee80211_recalc_ps(sdata->local, -1);
2093 mutex_unlock(&sdata->local->iflist_mtx);
2094
2095 ifmgd->probe_send_count = 0;
2096 ieee80211_mgd_probe_ap_send(sdata);
2097 out:
2098 sdata_unlock(sdata);
2099 }
2100
2101 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2102 struct ieee80211_vif *vif)
2103 {
2104 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2106 struct cfg80211_bss *cbss;
2107 struct sk_buff *skb;
2108 const u8 *ssid;
2109 int ssid_len;
2110
2111 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2112 return NULL;
2113
2114 sdata_assert_lock(sdata);
2115
2116 if (ifmgd->associated)
2117 cbss = ifmgd->associated;
2118 else if (ifmgd->auth_data)
2119 cbss = ifmgd->auth_data->bss;
2120 else if (ifmgd->assoc_data)
2121 cbss = ifmgd->assoc_data->bss;
2122 else
2123 return NULL;
2124
2125 rcu_read_lock();
2126 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2127 if (WARN_ON_ONCE(ssid == NULL))
2128 ssid_len = 0;
2129 else
2130 ssid_len = ssid[1];
2131
2132 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2133 (u32) -1, cbss->channel,
2134 ssid + 2, ssid_len,
2135 NULL, 0, true);
2136 rcu_read_unlock();
2137
2138 return skb;
2139 }
2140 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2141
2142 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2143 {
2144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2145 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2146
2147 sdata_lock(sdata);
2148 if (!ifmgd->associated) {
2149 sdata_unlock(sdata);
2150 return;
2151 }
2152
2153 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2154 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2155 true, frame_buf);
2156 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2157 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2158 IEEE80211_MAX_QUEUE_MAP,
2159 IEEE80211_QUEUE_STOP_REASON_CSA);
2160
2161 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2162 IEEE80211_DEAUTH_FRAME_LEN);
2163 sdata_unlock(sdata);
2164 }
2165
2166 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2167 {
2168 struct ieee80211_sub_if_data *sdata =
2169 container_of(work, struct ieee80211_sub_if_data,
2170 u.mgd.beacon_connection_loss_work);
2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2172 struct sta_info *sta;
2173
2174 if (ifmgd->associated) {
2175 rcu_read_lock();
2176 sta = sta_info_get(sdata, ifmgd->bssid);
2177 if (sta)
2178 sta->beacon_loss_count++;
2179 rcu_read_unlock();
2180 }
2181
2182 if (ifmgd->connection_loss) {
2183 sdata_info(sdata, "Connection to AP %pM lost\n",
2184 ifmgd->bssid);
2185 __ieee80211_disconnect(sdata);
2186 } else {
2187 ieee80211_mgd_probe_ap(sdata, true);
2188 }
2189 }
2190
2191 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2192 {
2193 struct ieee80211_sub_if_data *sdata =
2194 container_of(work, struct ieee80211_sub_if_data,
2195 u.mgd.csa_connection_drop_work);
2196
2197 __ieee80211_disconnect(sdata);
2198 }
2199
2200 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2201 {
2202 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2203 struct ieee80211_hw *hw = &sdata->local->hw;
2204
2205 trace_api_beacon_loss(sdata);
2206
2207 sdata->u.mgd.connection_loss = false;
2208 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2209 }
2210 EXPORT_SYMBOL(ieee80211_beacon_loss);
2211
2212 void ieee80211_connection_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_connection_loss(sdata);
2218
2219 sdata->u.mgd.connection_loss = true;
2220 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2221 }
2222 EXPORT_SYMBOL(ieee80211_connection_loss);
2223
2224
2225 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2226 bool assoc)
2227 {
2228 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2229
2230 sdata_assert_lock(sdata);
2231
2232 if (!assoc) {
2233 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2234
2235 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2236 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2237 sdata->u.mgd.flags = 0;
2238 ieee80211_vif_release_channel(sdata);
2239 }
2240
2241 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2242 kfree(auth_data);
2243 sdata->u.mgd.auth_data = NULL;
2244 }
2245
2246 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2247 struct ieee80211_mgmt *mgmt, size_t len)
2248 {
2249 struct ieee80211_local *local = sdata->local;
2250 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2251 u8 *pos;
2252 struct ieee802_11_elems elems;
2253 u32 tx_flags = 0;
2254
2255 pos = mgmt->u.auth.variable;
2256 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2257 if (!elems.challenge)
2258 return;
2259 auth_data->expected_transaction = 4;
2260 drv_mgd_prepare_tx(sdata->local, sdata);
2261 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2262 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2263 IEEE80211_TX_INTFL_MLME_CONN_TX;
2264 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2265 elems.challenge - 2, elems.challenge_len + 2,
2266 auth_data->bss->bssid, auth_data->bss->bssid,
2267 auth_data->key, auth_data->key_len,
2268 auth_data->key_idx, tx_flags);
2269 }
2270
2271 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2272 struct ieee80211_mgmt *mgmt, size_t len)
2273 {
2274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2275 u8 bssid[ETH_ALEN];
2276 u16 auth_alg, auth_transaction, status_code;
2277 struct sta_info *sta;
2278
2279 sdata_assert_lock(sdata);
2280
2281 if (len < 24 + 6)
2282 return;
2283
2284 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2285 return;
2286
2287 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2288
2289 if (!ether_addr_equal(bssid, mgmt->bssid))
2290 return;
2291
2292 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2293 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2294 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2295
2296 if (auth_alg != ifmgd->auth_data->algorithm ||
2297 auth_transaction != ifmgd->auth_data->expected_transaction) {
2298 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2299 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2300 auth_transaction,
2301 ifmgd->auth_data->expected_transaction);
2302 return;
2303 }
2304
2305 if (status_code != WLAN_STATUS_SUCCESS) {
2306 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2307 mgmt->sa, status_code);
2308 ieee80211_destroy_auth_data(sdata, false);
2309 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2310 return;
2311 }
2312
2313 switch (ifmgd->auth_data->algorithm) {
2314 case WLAN_AUTH_OPEN:
2315 case WLAN_AUTH_LEAP:
2316 case WLAN_AUTH_FT:
2317 case WLAN_AUTH_SAE:
2318 break;
2319 case WLAN_AUTH_SHARED_KEY:
2320 if (ifmgd->auth_data->expected_transaction != 4) {
2321 ieee80211_auth_challenge(sdata, mgmt, len);
2322 /* need another frame */
2323 return;
2324 }
2325 break;
2326 default:
2327 WARN_ONCE(1, "invalid auth alg %d",
2328 ifmgd->auth_data->algorithm);
2329 return;
2330 }
2331
2332 sdata_info(sdata, "authenticated\n");
2333 ifmgd->auth_data->done = true;
2334 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2335 ifmgd->auth_data->timeout_started = true;
2336 run_again(sdata, ifmgd->auth_data->timeout);
2337
2338 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2339 ifmgd->auth_data->expected_transaction != 2) {
2340 /*
2341 * Report auth frame to user space for processing since another
2342 * round of Authentication frames is still needed.
2343 */
2344 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2345 return;
2346 }
2347
2348 /* move station state to auth */
2349 mutex_lock(&sdata->local->sta_mtx);
2350 sta = sta_info_get(sdata, bssid);
2351 if (!sta) {
2352 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2353 goto out_err;
2354 }
2355 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2356 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2357 goto out_err;
2358 }
2359 mutex_unlock(&sdata->local->sta_mtx);
2360
2361 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2362 return;
2363 out_err:
2364 mutex_unlock(&sdata->local->sta_mtx);
2365 /* ignore frame -- wait for timeout */
2366 }
2367
2368
2369 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2370 struct ieee80211_mgmt *mgmt, size_t len)
2371 {
2372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2373 const u8 *bssid = NULL;
2374 u16 reason_code;
2375
2376 sdata_assert_lock(sdata);
2377
2378 if (len < 24 + 2)
2379 return;
2380
2381 if (!ifmgd->associated ||
2382 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2383 return;
2384
2385 bssid = ifmgd->associated->bssid;
2386
2387 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2388
2389 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2390 bssid, reason_code);
2391
2392 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2393
2394 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2395 }
2396
2397
2398 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2399 struct ieee80211_mgmt *mgmt, size_t len)
2400 {
2401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2402 u16 reason_code;
2403
2404 sdata_assert_lock(sdata);
2405
2406 if (len < 24 + 2)
2407 return;
2408
2409 if (!ifmgd->associated ||
2410 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2411 return;
2412
2413 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2414
2415 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2416 mgmt->sa, reason_code);
2417
2418 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2419
2420 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2421 }
2422
2423 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2424 u8 *supp_rates, unsigned int supp_rates_len,
2425 u32 *rates, u32 *basic_rates,
2426 bool *have_higher_than_11mbit,
2427 int *min_rate, int *min_rate_index,
2428 int shift, u32 rate_flags)
2429 {
2430 int i, j;
2431
2432 for (i = 0; i < supp_rates_len; i++) {
2433 int rate = supp_rates[i] & 0x7f;
2434 bool is_basic = !!(supp_rates[i] & 0x80);
2435
2436 if ((rate * 5 * (1 << shift)) > 110)
2437 *have_higher_than_11mbit = true;
2438
2439 /*
2440 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2441 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2442 *
2443 * Note: Even through the membership selector and the basic
2444 * rate flag share the same bit, they are not exactly
2445 * the same.
2446 */
2447 if (!!(supp_rates[i] & 0x80) &&
2448 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2449 continue;
2450
2451 for (j = 0; j < sband->n_bitrates; j++) {
2452 struct ieee80211_rate *br;
2453 int brate;
2454
2455 br = &sband->bitrates[j];
2456 if ((rate_flags & br->flags) != rate_flags)
2457 continue;
2458
2459 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2460 if (brate == rate) {
2461 *rates |= BIT(j);
2462 if (is_basic)
2463 *basic_rates |= BIT(j);
2464 if ((rate * 5) < *min_rate) {
2465 *min_rate = rate * 5;
2466 *min_rate_index = j;
2467 }
2468 break;
2469 }
2470 }
2471 }
2472 }
2473
2474 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2475 bool assoc)
2476 {
2477 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2478
2479 sdata_assert_lock(sdata);
2480
2481 if (!assoc) {
2482 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2483
2484 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2485 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2486 sdata->u.mgd.flags = 0;
2487 ieee80211_vif_release_channel(sdata);
2488 }
2489
2490 kfree(assoc_data);
2491 sdata->u.mgd.assoc_data = NULL;
2492 }
2493
2494 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2495 struct cfg80211_bss *cbss,
2496 struct ieee80211_mgmt *mgmt, size_t len)
2497 {
2498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2499 struct ieee80211_local *local = sdata->local;
2500 struct ieee80211_supported_band *sband;
2501 struct sta_info *sta;
2502 u8 *pos;
2503 u16 capab_info, aid;
2504 struct ieee802_11_elems elems;
2505 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2506 const struct cfg80211_bss_ies *bss_ies = NULL;
2507 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2508 u32 changed = 0;
2509 int err;
2510 bool ret;
2511
2512 /* AssocResp and ReassocResp have identical structure */
2513
2514 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2515 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2516
2517 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2518 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2519 aid);
2520 aid &= ~(BIT(15) | BIT(14));
2521
2522 ifmgd->broken_ap = false;
2523
2524 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2525 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2526 aid);
2527 aid = 0;
2528 ifmgd->broken_ap = true;
2529 }
2530
2531 pos = mgmt->u.assoc_resp.variable;
2532 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2533
2534 if (!elems.supp_rates) {
2535 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2536 return false;
2537 }
2538
2539 ifmgd->aid = aid;
2540
2541 /*
2542 * Some APs are erroneously not including some information in their
2543 * (re)association response frames. Try to recover by using the data
2544 * from the beacon or probe response. This seems to afflict mobile
2545 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2546 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2547 */
2548 if ((assoc_data->wmm && !elems.wmm_param) ||
2549 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2550 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2551 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2552 (!elems.vht_cap_elem || !elems.vht_operation))) {
2553 const struct cfg80211_bss_ies *ies;
2554 struct ieee802_11_elems bss_elems;
2555
2556 rcu_read_lock();
2557 ies = rcu_dereference(cbss->ies);
2558 if (ies)
2559 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2560 GFP_ATOMIC);
2561 rcu_read_unlock();
2562 if (!bss_ies)
2563 return false;
2564
2565 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2566 false, &bss_elems);
2567 if (assoc_data->wmm &&
2568 !elems.wmm_param && bss_elems.wmm_param) {
2569 elems.wmm_param = bss_elems.wmm_param;
2570 sdata_info(sdata,
2571 "AP bug: WMM param missing from AssocResp\n");
2572 }
2573
2574 /*
2575 * Also check if we requested HT/VHT, otherwise the AP doesn't
2576 * have to include the IEs in the (re)association response.
2577 */
2578 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2579 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2580 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2581 sdata_info(sdata,
2582 "AP bug: HT capability missing from AssocResp\n");
2583 }
2584 if (!elems.ht_operation && bss_elems.ht_operation &&
2585 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2586 elems.ht_operation = bss_elems.ht_operation;
2587 sdata_info(sdata,
2588 "AP bug: HT operation missing from AssocResp\n");
2589 }
2590 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2591 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2592 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2593 sdata_info(sdata,
2594 "AP bug: VHT capa missing from AssocResp\n");
2595 }
2596 if (!elems.vht_operation && bss_elems.vht_operation &&
2597 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2598 elems.vht_operation = bss_elems.vht_operation;
2599 sdata_info(sdata,
2600 "AP bug: VHT operation missing from AssocResp\n");
2601 }
2602 }
2603
2604 /*
2605 * We previously checked these in the beacon/probe response, so
2606 * they should be present here. This is just a safety net.
2607 */
2608 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2609 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2610 sdata_info(sdata,
2611 "HT AP is missing WMM params or HT capability/operation\n");
2612 ret = false;
2613 goto out;
2614 }
2615
2616 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2617 (!elems.vht_cap_elem || !elems.vht_operation)) {
2618 sdata_info(sdata,
2619 "VHT AP is missing VHT capability/operation\n");
2620 ret = false;
2621 goto out;
2622 }
2623
2624 mutex_lock(&sdata->local->sta_mtx);
2625 /*
2626 * station info was already allocated and inserted before
2627 * the association and should be available to us
2628 */
2629 sta = sta_info_get(sdata, cbss->bssid);
2630 if (WARN_ON(!sta)) {
2631 mutex_unlock(&sdata->local->sta_mtx);
2632 ret = false;
2633 goto out;
2634 }
2635
2636 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2637
2638 /* Set up internal HT/VHT capabilities */
2639 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2640 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2641 elems.ht_cap_elem, sta);
2642
2643 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2644 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2645 elems.vht_cap_elem, sta);
2646
2647 /*
2648 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2649 * in their association response, so ignore that data for our own
2650 * configuration. If it changed since the last beacon, we'll get the
2651 * next beacon and update then.
2652 */
2653
2654 /*
2655 * If an operating mode notification IE is present, override the
2656 * NSS calculation (that would be done in rate_control_rate_init())
2657 * and use the # of streams from that element.
2658 */
2659 if (elems.opmode_notif &&
2660 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2661 u8 nss;
2662
2663 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2664 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2665 nss += 1;
2666 sta->sta.rx_nss = nss;
2667 }
2668
2669 rate_control_rate_init(sta);
2670
2671 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2672 set_sta_flag(sta, WLAN_STA_MFP);
2673
2674 if (elems.wmm_param)
2675 set_sta_flag(sta, WLAN_STA_WME);
2676
2677 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2678 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2679 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2680 if (err) {
2681 sdata_info(sdata,
2682 "failed to move station %pM to desired state\n",
2683 sta->sta.addr);
2684 WARN_ON(__sta_info_destroy(sta));
2685 mutex_unlock(&sdata->local->sta_mtx);
2686 ret = false;
2687 goto out;
2688 }
2689
2690 mutex_unlock(&sdata->local->sta_mtx);
2691
2692 /*
2693 * Always handle WMM once after association regardless
2694 * of the first value the AP uses. Setting -1 here has
2695 * that effect because the AP values is an unsigned
2696 * 4-bit value.
2697 */
2698 ifmgd->wmm_last_param_set = -1;
2699
2700 if (elems.wmm_param)
2701 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2702 elems.wmm_param_len);
2703 else
2704 ieee80211_set_wmm_default(sdata, false);
2705 changed |= BSS_CHANGED_QOS;
2706
2707 /* set AID and assoc capability,
2708 * ieee80211_set_associated() will tell the driver */
2709 bss_conf->aid = aid;
2710 bss_conf->assoc_capability = capab_info;
2711 ieee80211_set_associated(sdata, cbss, changed);
2712
2713 /*
2714 * If we're using 4-addr mode, let the AP know that we're
2715 * doing so, so that it can create the STA VLAN on its side
2716 */
2717 if (ifmgd->use_4addr)
2718 ieee80211_send_4addr_nullfunc(local, sdata);
2719
2720 /*
2721 * Start timer to probe the connection to the AP now.
2722 * Also start the timer that will detect beacon loss.
2723 */
2724 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2725 ieee80211_sta_reset_beacon_monitor(sdata);
2726
2727 ret = true;
2728 out:
2729 kfree(bss_ies);
2730 return ret;
2731 }
2732
2733 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2734 struct ieee80211_mgmt *mgmt,
2735 size_t len)
2736 {
2737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2738 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2739 u16 capab_info, status_code, aid;
2740 struct ieee802_11_elems elems;
2741 u8 *pos;
2742 bool reassoc;
2743 struct cfg80211_bss *bss;
2744
2745 sdata_assert_lock(sdata);
2746
2747 if (!assoc_data)
2748 return;
2749 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2750 return;
2751
2752 /*
2753 * AssocResp and ReassocResp have identical structure, so process both
2754 * of them in this function.
2755 */
2756
2757 if (len < 24 + 6)
2758 return;
2759
2760 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2761 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2762 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2763 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2764
2765 sdata_info(sdata,
2766 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2767 reassoc ? "Rea" : "A", mgmt->sa,
2768 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2769
2770 pos = mgmt->u.assoc_resp.variable;
2771 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2772
2773 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2774 elems.timeout_int &&
2775 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2776 u32 tu, ms;
2777 tu = le32_to_cpu(elems.timeout_int->value);
2778 ms = tu * 1024 / 1000;
2779 sdata_info(sdata,
2780 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2781 mgmt->sa, tu, ms);
2782 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2783 assoc_data->timeout_started = true;
2784 if (ms > IEEE80211_ASSOC_TIMEOUT)
2785 run_again(sdata, assoc_data->timeout);
2786 return;
2787 }
2788
2789 bss = assoc_data->bss;
2790
2791 if (status_code != WLAN_STATUS_SUCCESS) {
2792 sdata_info(sdata, "%pM denied association (code=%d)\n",
2793 mgmt->sa, status_code);
2794 ieee80211_destroy_assoc_data(sdata, false);
2795 } else {
2796 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2797 /* oops -- internal error -- send timeout for now */
2798 ieee80211_destroy_assoc_data(sdata, false);
2799 cfg80211_assoc_timeout(sdata->dev, bss);
2800 return;
2801 }
2802 sdata_info(sdata, "associated\n");
2803
2804 /*
2805 * destroy assoc_data afterwards, as otherwise an idle
2806 * recalc after assoc_data is NULL but before associated
2807 * is set can cause the interface to go idle
2808 */
2809 ieee80211_destroy_assoc_data(sdata, true);
2810 }
2811
2812 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2813 }
2814
2815 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2816 struct ieee80211_mgmt *mgmt, size_t len,
2817 struct ieee80211_rx_status *rx_status,
2818 struct ieee802_11_elems *elems)
2819 {
2820 struct ieee80211_local *local = sdata->local;
2821 int freq;
2822 struct ieee80211_bss *bss;
2823 struct ieee80211_channel *channel;
2824
2825 sdata_assert_lock(sdata);
2826
2827 if (elems->ds_params)
2828 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2829 rx_status->band);
2830 else
2831 freq = rx_status->freq;
2832
2833 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2834
2835 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2836 return;
2837
2838 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2839 channel);
2840 if (bss) {
2841 ieee80211_rx_bss_put(local, bss);
2842 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2843 }
2844
2845 if (!sdata->u.mgd.associated ||
2846 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2847 return;
2848
2849 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2850 elems, true);
2851
2852 }
2853
2854
2855 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2856 struct sk_buff *skb)
2857 {
2858 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2859 struct ieee80211_if_managed *ifmgd;
2860 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2861 size_t baselen, len = skb->len;
2862 struct ieee802_11_elems elems;
2863
2864 ifmgd = &sdata->u.mgd;
2865
2866 sdata_assert_lock(sdata);
2867
2868 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2869 return; /* ignore ProbeResp to foreign address */
2870
2871 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2872 if (baselen > len)
2873 return;
2874
2875 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2876 false, &elems);
2877
2878 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2879
2880 if (ifmgd->associated &&
2881 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2882 ieee80211_reset_ap_probe(sdata);
2883
2884 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2885 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2886 /* got probe response, continue with auth */
2887 sdata_info(sdata, "direct probe responded\n");
2888 ifmgd->auth_data->tries = 0;
2889 ifmgd->auth_data->timeout = jiffies;
2890 ifmgd->auth_data->timeout_started = true;
2891 run_again(sdata, ifmgd->auth_data->timeout);
2892 }
2893 }
2894
2895 /*
2896 * This is the canonical list of information elements we care about,
2897 * the filter code also gives us all changes to the Microsoft OUI
2898 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2899 *
2900 * We implement beacon filtering in software since that means we can
2901 * avoid processing the frame here and in cfg80211, and userspace
2902 * will not be able to tell whether the hardware supports it or not.
2903 *
2904 * XXX: This list needs to be dynamic -- userspace needs to be able to
2905 * add items it requires. It also needs to be able to tell us to
2906 * look out for other vendor IEs.
2907 */
2908 static const u64 care_about_ies =
2909 (1ULL << WLAN_EID_COUNTRY) |
2910 (1ULL << WLAN_EID_ERP_INFO) |
2911 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2912 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2913 (1ULL << WLAN_EID_HT_CAPABILITY) |
2914 (1ULL << WLAN_EID_HT_OPERATION);
2915
2916 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2917 struct ieee80211_mgmt *mgmt, size_t len,
2918 struct ieee80211_rx_status *rx_status)
2919 {
2920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2921 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2922 size_t baselen;
2923 struct ieee802_11_elems elems;
2924 struct ieee80211_local *local = sdata->local;
2925 struct ieee80211_chanctx_conf *chanctx_conf;
2926 struct ieee80211_channel *chan;
2927 struct sta_info *sta;
2928 u32 changed = 0;
2929 bool erp_valid;
2930 u8 erp_value = 0;
2931 u32 ncrc;
2932 u8 *bssid;
2933 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2934
2935 sdata_assert_lock(sdata);
2936
2937 /* Process beacon from the current BSS */
2938 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2939 if (baselen > len)
2940 return;
2941
2942 rcu_read_lock();
2943 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2944 if (!chanctx_conf) {
2945 rcu_read_unlock();
2946 return;
2947 }
2948
2949 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2950 rcu_read_unlock();
2951 return;
2952 }
2953 chan = chanctx_conf->def.chan;
2954 rcu_read_unlock();
2955
2956 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2957 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2958 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2959 len - baselen, false, &elems);
2960
2961 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2962 if (elems.tim && !elems.parse_error) {
2963 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2964 ifmgd->dtim_period = tim_ie->dtim_period;
2965 }
2966 ifmgd->have_beacon = true;
2967 ifmgd->assoc_data->need_beacon = false;
2968 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2969 sdata->vif.bss_conf.sync_tsf =
2970 le64_to_cpu(mgmt->u.beacon.timestamp);
2971 sdata->vif.bss_conf.sync_device_ts =
2972 rx_status->device_timestamp;
2973 if (elems.tim)
2974 sdata->vif.bss_conf.sync_dtim_count =
2975 elems.tim->dtim_count;
2976 else
2977 sdata->vif.bss_conf.sync_dtim_count = 0;
2978 }
2979 /* continue assoc process */
2980 ifmgd->assoc_data->timeout = jiffies;
2981 ifmgd->assoc_data->timeout_started = true;
2982 run_again(sdata, ifmgd->assoc_data->timeout);
2983 return;
2984 }
2985
2986 if (!ifmgd->associated ||
2987 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2988 return;
2989 bssid = ifmgd->associated->bssid;
2990
2991 /* Track average RSSI from the Beacon frames of the current AP */
2992 ifmgd->last_beacon_signal = rx_status->signal;
2993 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2994 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2995 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2996 ifmgd->last_cqm_event_signal = 0;
2997 ifmgd->count_beacon_signal = 1;
2998 ifmgd->last_ave_beacon_signal = 0;
2999 } else {
3000 ifmgd->ave_beacon_signal =
3001 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3002 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3003 ifmgd->ave_beacon_signal) / 16;
3004 ifmgd->count_beacon_signal++;
3005 }
3006
3007 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3008 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3009 int sig = ifmgd->ave_beacon_signal;
3010 int last_sig = ifmgd->last_ave_beacon_signal;
3011
3012 /*
3013 * if signal crosses either of the boundaries, invoke callback
3014 * with appropriate parameters
3015 */
3016 if (sig > ifmgd->rssi_max_thold &&
3017 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3018 ifmgd->last_ave_beacon_signal = sig;
3019 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3020 } else if (sig < ifmgd->rssi_min_thold &&
3021 (last_sig >= ifmgd->rssi_max_thold ||
3022 last_sig == 0)) {
3023 ifmgd->last_ave_beacon_signal = sig;
3024 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3025 }
3026 }
3027
3028 if (bss_conf->cqm_rssi_thold &&
3029 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3030 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3031 int sig = ifmgd->ave_beacon_signal / 16;
3032 int last_event = ifmgd->last_cqm_event_signal;
3033 int thold = bss_conf->cqm_rssi_thold;
3034 int hyst = bss_conf->cqm_rssi_hyst;
3035 if (sig < thold &&
3036 (last_event == 0 || sig < last_event - hyst)) {
3037 ifmgd->last_cqm_event_signal = sig;
3038 ieee80211_cqm_rssi_notify(
3039 &sdata->vif,
3040 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3041 GFP_KERNEL);
3042 } else if (sig > thold &&
3043 (last_event == 0 || sig > last_event + hyst)) {
3044 ifmgd->last_cqm_event_signal = sig;
3045 ieee80211_cqm_rssi_notify(
3046 &sdata->vif,
3047 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3048 GFP_KERNEL);
3049 }
3050 }
3051
3052 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3053 mlme_dbg_ratelimited(sdata,
3054 "cancelling AP probe due to a received beacon\n");
3055 mutex_lock(&local->mtx);
3056 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3057 ieee80211_run_deferred_scan(local);
3058 mutex_unlock(&local->mtx);
3059
3060 mutex_lock(&local->iflist_mtx);
3061 ieee80211_recalc_ps(local, -1);
3062 mutex_unlock(&local->iflist_mtx);
3063 }
3064
3065 /*
3066 * Push the beacon loss detection into the future since
3067 * we are processing a beacon from the AP just now.
3068 */
3069 ieee80211_sta_reset_beacon_monitor(sdata);
3070
3071 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3072 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3073 len - baselen, false, &elems,
3074 care_about_ies, ncrc);
3075
3076 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3077 bool directed_tim = ieee80211_check_tim(elems.tim,
3078 elems.tim_len,
3079 ifmgd->aid);
3080 if (directed_tim) {
3081 if (local->hw.conf.dynamic_ps_timeout > 0) {
3082 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3083 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3084 ieee80211_hw_config(local,
3085 IEEE80211_CONF_CHANGE_PS);
3086 }
3087 ieee80211_send_nullfunc(local, sdata, 0);
3088 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3089 local->pspolling = true;
3090
3091 /*
3092 * Here is assumed that the driver will be
3093 * able to send ps-poll frame and receive a
3094 * response even though power save mode is
3095 * enabled, but some drivers might require
3096 * to disable power save here. This needs
3097 * to be investigated.
3098 */
3099 ieee80211_send_pspoll(local, sdata);
3100 }
3101 }
3102 }
3103
3104 if (sdata->vif.p2p) {
3105 struct ieee80211_p2p_noa_attr noa = {};
3106 int ret;
3107
3108 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3109 len - baselen,
3110 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3111 (u8 *) &noa, sizeof(noa));
3112 if (ret >= 2) {
3113 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3114 /* valid noa_attr and index changed */
3115 sdata->u.mgd.p2p_noa_index = noa.index;
3116 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3117 changed |= BSS_CHANGED_P2P_PS;
3118 /*
3119 * make sure we update all information, the CRC
3120 * mechanism doesn't look at P2P attributes.
3121 */
3122 ifmgd->beacon_crc_valid = false;
3123 }
3124 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3125 /* noa_attr not found and we had valid noa_attr before */
3126 sdata->u.mgd.p2p_noa_index = -1;
3127 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3128 changed |= BSS_CHANGED_P2P_PS;
3129 ifmgd->beacon_crc_valid = false;
3130 }
3131 }
3132
3133 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3134 return;
3135 ifmgd->beacon_crc = ncrc;
3136 ifmgd->beacon_crc_valid = true;
3137
3138 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3139
3140 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3141 elems.wmm_param_len))
3142 changed |= BSS_CHANGED_QOS;
3143
3144 /*
3145 * If we haven't had a beacon before, tell the driver about the
3146 * DTIM period (and beacon timing if desired) now.
3147 */
3148 if (!ifmgd->have_beacon) {
3149 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3150 if (elems.tim)
3151 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3152 else
3153 bss_conf->dtim_period = 1;
3154
3155 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3156 sdata->vif.bss_conf.sync_tsf =
3157 le64_to_cpu(mgmt->u.beacon.timestamp);
3158 sdata->vif.bss_conf.sync_device_ts =
3159 rx_status->device_timestamp;
3160 if (elems.tim)
3161 sdata->vif.bss_conf.sync_dtim_count =
3162 elems.tim->dtim_count;
3163 else
3164 sdata->vif.bss_conf.sync_dtim_count = 0;
3165 }
3166
3167 changed |= BSS_CHANGED_BEACON_INFO;
3168 ifmgd->have_beacon = true;
3169
3170 mutex_lock(&local->iflist_mtx);
3171 ieee80211_recalc_ps(local, -1);
3172 mutex_unlock(&local->iflist_mtx);
3173
3174 ieee80211_recalc_ps_vif(sdata);
3175 }
3176
3177 if (elems.erp_info) {
3178 erp_valid = true;
3179 erp_value = elems.erp_info[0];
3180 } else {
3181 erp_valid = false;
3182 }
3183 changed |= ieee80211_handle_bss_capability(sdata,
3184 le16_to_cpu(mgmt->u.beacon.capab_info),
3185 erp_valid, erp_value);
3186
3187 mutex_lock(&local->sta_mtx);
3188 sta = sta_info_get(sdata, bssid);
3189
3190 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3191 elems.vht_operation, bssid, &changed)) {
3192 mutex_unlock(&local->sta_mtx);
3193 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3194 WLAN_REASON_DEAUTH_LEAVING,
3195 true, deauth_buf);
3196 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3197 sizeof(deauth_buf));
3198 return;
3199 }
3200
3201 if (sta && elems.opmode_notif)
3202 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3203 rx_status->band, true);
3204 mutex_unlock(&local->sta_mtx);
3205
3206 if (elems.country_elem && elems.pwr_constr_elem &&
3207 mgmt->u.probe_resp.capab_info &
3208 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3209 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3210 elems.country_elem,
3211 elems.country_elem_len,
3212 elems.pwr_constr_elem);
3213
3214 ieee80211_bss_info_change_notify(sdata, changed);
3215 }
3216
3217 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3218 struct sk_buff *skb)
3219 {
3220 struct ieee80211_rx_status *rx_status;
3221 struct ieee80211_mgmt *mgmt;
3222 u16 fc;
3223 struct ieee802_11_elems elems;
3224 int ies_len;
3225
3226 rx_status = (struct ieee80211_rx_status *) skb->cb;
3227 mgmt = (struct ieee80211_mgmt *) skb->data;
3228 fc = le16_to_cpu(mgmt->frame_control);
3229
3230 sdata_lock(sdata);
3231
3232 switch (fc & IEEE80211_FCTL_STYPE) {
3233 case IEEE80211_STYPE_BEACON:
3234 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3235 break;
3236 case IEEE80211_STYPE_PROBE_RESP:
3237 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3238 break;
3239 case IEEE80211_STYPE_AUTH:
3240 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3241 break;
3242 case IEEE80211_STYPE_DEAUTH:
3243 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3244 break;
3245 case IEEE80211_STYPE_DISASSOC:
3246 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3247 break;
3248 case IEEE80211_STYPE_ASSOC_RESP:
3249 case IEEE80211_STYPE_REASSOC_RESP:
3250 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3251 break;
3252 case IEEE80211_STYPE_ACTION:
3253 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3254 ies_len = skb->len -
3255 offsetof(struct ieee80211_mgmt,
3256 u.action.u.chan_switch.variable);
3257
3258 if (ies_len < 0)
3259 break;
3260
3261 ieee802_11_parse_elems(
3262 mgmt->u.action.u.chan_switch.variable,
3263 ies_len, true, &elems);
3264
3265 if (elems.parse_error)
3266 break;
3267
3268 ieee80211_sta_process_chanswitch(sdata,
3269 rx_status->mactime,
3270 &elems, false);
3271 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3272 ies_len = skb->len -
3273 offsetof(struct ieee80211_mgmt,
3274 u.action.u.ext_chan_switch.variable);
3275
3276 if (ies_len < 0)
3277 break;
3278
3279 ieee802_11_parse_elems(
3280 mgmt->u.action.u.ext_chan_switch.variable,
3281 ies_len, true, &elems);
3282
3283 if (elems.parse_error)
3284 break;
3285
3286 /* for the handling code pretend this was also an IE */
3287 elems.ext_chansw_ie =
3288 &mgmt->u.action.u.ext_chan_switch.data;
3289
3290 ieee80211_sta_process_chanswitch(sdata,
3291 rx_status->mactime,
3292 &elems, false);
3293 }
3294 break;
3295 }
3296 sdata_unlock(sdata);
3297 }
3298
3299 static void ieee80211_sta_timer(unsigned long data)
3300 {
3301 struct ieee80211_sub_if_data *sdata =
3302 (struct ieee80211_sub_if_data *) data;
3303
3304 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3305 }
3306
3307 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3308 u8 *bssid, u8 reason, bool tx)
3309 {
3310 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3311
3312 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3313 tx, frame_buf);
3314
3315 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3316 IEEE80211_DEAUTH_FRAME_LEN);
3317 }
3318
3319 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3320 {
3321 struct ieee80211_local *local = sdata->local;
3322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3323 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3324 u32 tx_flags = 0;
3325
3326 sdata_assert_lock(sdata);
3327
3328 if (WARN_ON_ONCE(!auth_data))
3329 return -EINVAL;
3330
3331 auth_data->tries++;
3332
3333 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3334 sdata_info(sdata, "authentication with %pM timed out\n",
3335 auth_data->bss->bssid);
3336
3337 /*
3338 * Most likely AP is not in the range so remove the
3339 * bss struct for that AP.
3340 */
3341 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3342
3343 return -ETIMEDOUT;
3344 }
3345
3346 drv_mgd_prepare_tx(local, sdata);
3347
3348 if (auth_data->bss->proberesp_ies) {
3349 u16 trans = 1;
3350 u16 status = 0;
3351
3352 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3353 auth_data->bss->bssid, auth_data->tries,
3354 IEEE80211_AUTH_MAX_TRIES);
3355
3356 auth_data->expected_transaction = 2;
3357
3358 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3359 trans = auth_data->sae_trans;
3360 status = auth_data->sae_status;
3361 auth_data->expected_transaction = trans;
3362 }
3363
3364 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3365 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3366 IEEE80211_TX_INTFL_MLME_CONN_TX;
3367
3368 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3369 auth_data->data, auth_data->data_len,
3370 auth_data->bss->bssid,
3371 auth_data->bss->bssid, NULL, 0, 0,
3372 tx_flags);
3373 } else {
3374 const u8 *ssidie;
3375
3376 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3377 auth_data->bss->bssid, auth_data->tries,
3378 IEEE80211_AUTH_MAX_TRIES);
3379
3380 rcu_read_lock();
3381 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3382 if (!ssidie) {
3383 rcu_read_unlock();
3384 return -EINVAL;
3385 }
3386 /*
3387 * Direct probe is sent to broadcast address as some APs
3388 * will not answer to direct packet in unassociated state.
3389 */
3390 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3391 NULL, 0, (u32) -1, true, 0,
3392 auth_data->bss->channel, false);
3393 rcu_read_unlock();
3394 }
3395
3396 if (tx_flags == 0) {
3397 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3398 ifmgd->auth_data->timeout_started = true;
3399 run_again(sdata, auth_data->timeout);
3400 } else {
3401 auth_data->timeout_started = false;
3402 }
3403
3404 return 0;
3405 }
3406
3407 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3408 {
3409 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3410 struct ieee80211_local *local = sdata->local;
3411
3412 sdata_assert_lock(sdata);
3413
3414 assoc_data->tries++;
3415 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3416 sdata_info(sdata, "association with %pM timed out\n",
3417 assoc_data->bss->bssid);
3418
3419 /*
3420 * Most likely AP is not in the range so remove the
3421 * bss struct for that AP.
3422 */
3423 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3424
3425 return -ETIMEDOUT;
3426 }
3427
3428 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3429 assoc_data->bss->bssid, assoc_data->tries,
3430 IEEE80211_ASSOC_MAX_TRIES);
3431 ieee80211_send_assoc(sdata);
3432
3433 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3434 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3435 assoc_data->timeout_started = true;
3436 run_again(sdata, assoc_data->timeout);
3437 } else {
3438 assoc_data->timeout_started = false;
3439 }
3440
3441 return 0;
3442 }
3443
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445 __le16 fc, bool acked)
3446 {
3447 struct ieee80211_local *local = sdata->local;
3448
3449 sdata->u.mgd.status_fc = fc;
3450 sdata->u.mgd.status_acked = acked;
3451 sdata->u.mgd.status_received = true;
3452
3453 ieee80211_queue_work(&local->hw, &sdata->work);
3454 }
3455
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3457 {
3458 struct ieee80211_local *local = sdata->local;
3459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3460
3461 sdata_lock(sdata);
3462
3463 if (ifmgd->status_received) {
3464 __le16 fc = ifmgd->status_fc;
3465 bool status_acked = ifmgd->status_acked;
3466
3467 ifmgd->status_received = false;
3468 if (ifmgd->auth_data &&
3469 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470 if (status_acked) {
3471 ifmgd->auth_data->timeout =
3472 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3473 run_again(sdata, ifmgd->auth_data->timeout);
3474 } else {
3475 ifmgd->auth_data->timeout = jiffies - 1;
3476 }
3477 ifmgd->auth_data->timeout_started = true;
3478 } else if (ifmgd->assoc_data &&
3479 (ieee80211_is_assoc_req(fc) ||
3480 ieee80211_is_reassoc_req(fc))) {
3481 if (status_acked) {
3482 ifmgd->assoc_data->timeout =
3483 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3484 run_again(sdata, ifmgd->assoc_data->timeout);
3485 } else {
3486 ifmgd->assoc_data->timeout = jiffies - 1;
3487 }
3488 ifmgd->assoc_data->timeout_started = true;
3489 }
3490 }
3491
3492 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3493 time_after(jiffies, ifmgd->auth_data->timeout)) {
3494 if (ifmgd->auth_data->done) {
3495 /*
3496 * ok ... we waited for assoc but userspace didn't,
3497 * so let's just kill the auth data
3498 */
3499 ieee80211_destroy_auth_data(sdata, false);
3500 } else if (ieee80211_probe_auth(sdata)) {
3501 u8 bssid[ETH_ALEN];
3502
3503 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505 ieee80211_destroy_auth_data(sdata, false);
3506
3507 cfg80211_auth_timeout(sdata->dev, bssid);
3508 }
3509 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3510 run_again(sdata, ifmgd->auth_data->timeout);
3511
3512 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3513 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3514 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3515 ieee80211_do_assoc(sdata)) {
3516 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3517
3518 ieee80211_destroy_assoc_data(sdata, false);
3519 cfg80211_assoc_timeout(sdata->dev, bss);
3520 }
3521 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3522 run_again(sdata, ifmgd->assoc_data->timeout);
3523
3524 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3525 IEEE80211_STA_CONNECTION_POLL) &&
3526 ifmgd->associated) {
3527 u8 bssid[ETH_ALEN];
3528 int max_tries;
3529
3530 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3531
3532 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3533 max_tries = max_nullfunc_tries;
3534 else
3535 max_tries = max_probe_tries;
3536
3537 /* ACK received for nullfunc probing frame */
3538 if (!ifmgd->probe_send_count)
3539 ieee80211_reset_ap_probe(sdata);
3540 else if (ifmgd->nullfunc_failed) {
3541 if (ifmgd->probe_send_count < max_tries) {
3542 mlme_dbg(sdata,
3543 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3544 bssid, ifmgd->probe_send_count,
3545 max_tries);
3546 ieee80211_mgd_probe_ap_send(sdata);
3547 } else {
3548 mlme_dbg(sdata,
3549 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3550 bssid);
3551 ieee80211_sta_connection_lost(sdata, bssid,
3552 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3553 false);
3554 }
3555 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3556 run_again(sdata, ifmgd->probe_timeout);
3557 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3558 mlme_dbg(sdata,
3559 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3560 bssid, probe_wait_ms);
3561 ieee80211_sta_connection_lost(sdata, bssid,
3562 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3563 } else if (ifmgd->probe_send_count < max_tries) {
3564 mlme_dbg(sdata,
3565 "No probe response from AP %pM after %dms, try %d/%i\n",
3566 bssid, probe_wait_ms,
3567 ifmgd->probe_send_count, max_tries);
3568 ieee80211_mgd_probe_ap_send(sdata);
3569 } else {
3570 /*
3571 * We actually lost the connection ... or did we?
3572 * Let's make sure!
3573 */
3574 wiphy_debug(local->hw.wiphy,
3575 "%s: No probe response from AP %pM"
3576 " after %dms, disconnecting.\n",
3577 sdata->name,
3578 bssid, probe_wait_ms);
3579
3580 ieee80211_sta_connection_lost(sdata, bssid,
3581 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3582 }
3583 }
3584
3585 sdata_unlock(sdata);
3586 }
3587
3588 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3589 {
3590 struct ieee80211_sub_if_data *sdata =
3591 (struct ieee80211_sub_if_data *) data;
3592 struct ieee80211_local *local = sdata->local;
3593
3594 if (local->quiescing)
3595 return;
3596
3597 sdata->u.mgd.connection_loss = false;
3598 ieee80211_queue_work(&sdata->local->hw,
3599 &sdata->u.mgd.beacon_connection_loss_work);
3600 }
3601
3602 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3603 {
3604 struct ieee80211_sub_if_data *sdata =
3605 (struct ieee80211_sub_if_data *) data;
3606 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3607 struct ieee80211_local *local = sdata->local;
3608
3609 if (local->quiescing)
3610 return;
3611
3612 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3613 }
3614
3615 static void ieee80211_sta_monitor_work(struct work_struct *work)
3616 {
3617 struct ieee80211_sub_if_data *sdata =
3618 container_of(work, struct ieee80211_sub_if_data,
3619 u.mgd.monitor_work);
3620
3621 ieee80211_mgd_probe_ap(sdata, false);
3622 }
3623
3624 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3625 {
3626 u32 flags;
3627
3628 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3629 __ieee80211_stop_poll(sdata);
3630
3631 /* let's probe the connection once */
3632 flags = sdata->local->hw.flags;
3633 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3634 ieee80211_queue_work(&sdata->local->hw,
3635 &sdata->u.mgd.monitor_work);
3636 /* and do all the other regular work too */
3637 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3638 }
3639 }
3640
3641 #ifdef CONFIG_PM
3642 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3643 {
3644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3645
3646 sdata_lock(sdata);
3647 if (!ifmgd->associated) {
3648 sdata_unlock(sdata);
3649 return;
3650 }
3651
3652 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3653 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3654 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3655 ieee80211_sta_connection_lost(sdata,
3656 ifmgd->associated->bssid,
3657 WLAN_REASON_UNSPECIFIED,
3658 true);
3659 sdata_unlock(sdata);
3660 return;
3661 }
3662 sdata_unlock(sdata);
3663 }
3664 #endif
3665
3666 /* interface setup */
3667 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3668 {
3669 struct ieee80211_if_managed *ifmgd;
3670
3671 ifmgd = &sdata->u.mgd;
3672 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3673 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3674 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3675 ieee80211_beacon_connection_loss_work);
3676 INIT_WORK(&ifmgd->csa_connection_drop_work,
3677 ieee80211_csa_connection_drop_work);
3678 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3679 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3680 (unsigned long) sdata);
3681 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3682 (unsigned long) sdata);
3683 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3684 (unsigned long) sdata);
3685 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3686 (unsigned long) sdata);
3687
3688 ifmgd->flags = 0;
3689 ifmgd->powersave = sdata->wdev.ps;
3690 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3691 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3692 ifmgd->p2p_noa_index = -1;
3693
3694 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3695 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3696 else
3697 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3698 }
3699
3700 /* scan finished notification */
3701 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3702 {
3703 struct ieee80211_sub_if_data *sdata;
3704
3705 /* Restart STA timers */
3706 rcu_read_lock();
3707 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3708 if (ieee80211_sdata_running(sdata))
3709 ieee80211_restart_sta_timer(sdata);
3710 }
3711 rcu_read_unlock();
3712 }
3713
3714 int ieee80211_max_network_latency(struct notifier_block *nb,
3715 unsigned long data, void *dummy)
3716 {
3717 s32 latency_usec = (s32) data;
3718 struct ieee80211_local *local =
3719 container_of(nb, struct ieee80211_local,
3720 network_latency_notifier);
3721
3722 mutex_lock(&local->iflist_mtx);
3723 ieee80211_recalc_ps(local, latency_usec);
3724 mutex_unlock(&local->iflist_mtx);
3725
3726 return 0;
3727 }
3728
3729 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3730 struct cfg80211_bss *cbss)
3731 {
3732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3733 const u8 *ht_cap_ie, *vht_cap_ie;
3734 const struct ieee80211_ht_cap *ht_cap;
3735 const struct ieee80211_vht_cap *vht_cap;
3736 u8 chains = 1;
3737
3738 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3739 return chains;
3740
3741 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3742 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3743 ht_cap = (void *)(ht_cap_ie + 2);
3744 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3745 /*
3746 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3747 * "Tx Unequal Modulation Supported" fields.
3748 */
3749 }
3750
3751 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3752 return chains;
3753
3754 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3755 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3756 u8 nss;
3757 u16 tx_mcs_map;
3758
3759 vht_cap = (void *)(vht_cap_ie + 2);
3760 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3761 for (nss = 8; nss > 0; nss--) {
3762 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3763 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3764 break;
3765 }
3766 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3767 chains = max(chains, nss);
3768 }
3769
3770 return chains;
3771 }
3772
3773 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3774 struct cfg80211_bss *cbss)
3775 {
3776 struct ieee80211_local *local = sdata->local;
3777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3778 const struct ieee80211_ht_operation *ht_oper = NULL;
3779 const struct ieee80211_vht_operation *vht_oper = NULL;
3780 struct ieee80211_supported_band *sband;
3781 struct cfg80211_chan_def chandef;
3782 int ret;
3783
3784 sband = local->hw.wiphy->bands[cbss->channel->band];
3785
3786 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3787 IEEE80211_STA_DISABLE_80P80MHZ |
3788 IEEE80211_STA_DISABLE_160MHZ);
3789
3790 rcu_read_lock();
3791
3792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3793 sband->ht_cap.ht_supported) {
3794 const u8 *ht_oper_ie, *ht_cap;
3795
3796 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3797 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3798 ht_oper = (void *)(ht_oper_ie + 2);
3799
3800 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3801 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3802 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3803 ht_oper = NULL;
3804 }
3805 }
3806
3807 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3808 sband->vht_cap.vht_supported) {
3809 const u8 *vht_oper_ie, *vht_cap;
3810
3811 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3812 WLAN_EID_VHT_OPERATION);
3813 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3814 vht_oper = (void *)(vht_oper_ie + 2);
3815 if (vht_oper && !ht_oper) {
3816 vht_oper = NULL;
3817 sdata_info(sdata,
3818 "AP advertised VHT without HT, disabling both\n");
3819 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3820 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3821 }
3822
3823 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3824 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3825 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3826 vht_oper = NULL;
3827 }
3828 }
3829
3830 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3831 cbss->channel,
3832 ht_oper, vht_oper,
3833 &chandef, true);
3834
3835 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3836 local->rx_chains);
3837
3838 rcu_read_unlock();
3839
3840 /* will change later if needed */
3841 sdata->smps_mode = IEEE80211_SMPS_OFF;
3842
3843 /*
3844 * If this fails (possibly due to channel context sharing
3845 * on incompatible channels, e.g. 80+80 and 160 sharing the
3846 * same control channel) try to use a smaller bandwidth.
3847 */
3848 ret = ieee80211_vif_use_channel(sdata, &chandef,
3849 IEEE80211_CHANCTX_SHARED);
3850
3851 /* don't downgrade for 5 and 10 MHz channels, though. */
3852 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3853 chandef.width == NL80211_CHAN_WIDTH_10)
3854 return ret;
3855
3856 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3857 ifmgd->flags |= chandef_downgrade(&chandef);
3858 ret = ieee80211_vif_use_channel(sdata, &chandef,
3859 IEEE80211_CHANCTX_SHARED);
3860 }
3861 return ret;
3862 }
3863
3864 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3865 struct cfg80211_bss *cbss, bool assoc)
3866 {
3867 struct ieee80211_local *local = sdata->local;
3868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3869 struct ieee80211_bss *bss = (void *)cbss->priv;
3870 struct sta_info *new_sta = NULL;
3871 bool have_sta = false;
3872 int err;
3873
3874 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3875 return -EINVAL;
3876
3877 if (assoc) {
3878 rcu_read_lock();
3879 have_sta = sta_info_get(sdata, cbss->bssid);
3880 rcu_read_unlock();
3881 }
3882
3883 if (!have_sta) {
3884 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3885 if (!new_sta)
3886 return -ENOMEM;
3887 }
3888 if (new_sta) {
3889 u32 rates = 0, basic_rates = 0;
3890 bool have_higher_than_11mbit;
3891 int min_rate = INT_MAX, min_rate_index = -1;
3892 struct ieee80211_chanctx_conf *chanctx_conf;
3893 struct ieee80211_supported_band *sband;
3894 const struct cfg80211_bss_ies *ies;
3895 int shift;
3896 u32 rate_flags;
3897
3898 sband = local->hw.wiphy->bands[cbss->channel->band];
3899
3900 err = ieee80211_prep_channel(sdata, cbss);
3901 if (err) {
3902 sta_info_free(local, new_sta);
3903 return -EINVAL;
3904 }
3905 shift = ieee80211_vif_get_shift(&sdata->vif);
3906
3907 rcu_read_lock();
3908 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3909 if (WARN_ON(!chanctx_conf)) {
3910 rcu_read_unlock();
3911 return -EINVAL;
3912 }
3913 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3914 rcu_read_unlock();
3915
3916 ieee80211_get_rates(sband, bss->supp_rates,
3917 bss->supp_rates_len,
3918 &rates, &basic_rates,
3919 &have_higher_than_11mbit,
3920 &min_rate, &min_rate_index,
3921 shift, rate_flags);
3922
3923 /*
3924 * This used to be a workaround for basic rates missing
3925 * in the association response frame. Now that we no
3926 * longer use the basic rates from there, it probably
3927 * doesn't happen any more, but keep the workaround so
3928 * in case some *other* APs are buggy in different ways
3929 * we can connect -- with a warning.
3930 */
3931 if (!basic_rates && min_rate_index >= 0) {
3932 sdata_info(sdata,
3933 "No basic rates, using min rate instead\n");
3934 basic_rates = BIT(min_rate_index);
3935 }
3936
3937 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3938 sdata->vif.bss_conf.basic_rates = basic_rates;
3939
3940 /* cf. IEEE 802.11 9.2.12 */
3941 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3942 have_higher_than_11mbit)
3943 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3944 else
3945 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3946
3947 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3948
3949 /* set timing information */
3950 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3951 rcu_read_lock();
3952 ies = rcu_dereference(cbss->beacon_ies);
3953 if (ies) {
3954 const u8 *tim_ie;
3955
3956 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3957 sdata->vif.bss_conf.sync_device_ts =
3958 bss->device_ts_beacon;
3959 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3960 ies->data, ies->len);
3961 if (tim_ie && tim_ie[1] >= 2)
3962 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3963 else
3964 sdata->vif.bss_conf.sync_dtim_count = 0;
3965 } else if (!(local->hw.flags &
3966 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3967 ies = rcu_dereference(cbss->proberesp_ies);
3968 /* must be non-NULL since beacon IEs were NULL */
3969 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3970 sdata->vif.bss_conf.sync_device_ts =
3971 bss->device_ts_presp;
3972 sdata->vif.bss_conf.sync_dtim_count = 0;
3973 } else {
3974 sdata->vif.bss_conf.sync_tsf = 0;
3975 sdata->vif.bss_conf.sync_device_ts = 0;
3976 sdata->vif.bss_conf.sync_dtim_count = 0;
3977 }
3978 rcu_read_unlock();
3979
3980 /* tell driver about BSSID, basic rates and timing */
3981 ieee80211_bss_info_change_notify(sdata,
3982 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3983 BSS_CHANGED_BEACON_INT);
3984
3985 if (assoc)
3986 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3987
3988 err = sta_info_insert(new_sta);
3989 new_sta = NULL;
3990 if (err) {
3991 sdata_info(sdata,
3992 "failed to insert STA entry for the AP (error %d)\n",
3993 err);
3994 return err;
3995 }
3996 } else
3997 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3998
3999 return 0;
4000 }
4001
4002 /* config hooks */
4003 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4004 struct cfg80211_auth_request *req)
4005 {
4006 struct ieee80211_local *local = sdata->local;
4007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4008 struct ieee80211_mgd_auth_data *auth_data;
4009 u16 auth_alg;
4010 int err;
4011
4012 /* prepare auth data structure */
4013
4014 switch (req->auth_type) {
4015 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4016 auth_alg = WLAN_AUTH_OPEN;
4017 break;
4018 case NL80211_AUTHTYPE_SHARED_KEY:
4019 if (IS_ERR(local->wep_tx_tfm))
4020 return -EOPNOTSUPP;
4021 auth_alg = WLAN_AUTH_SHARED_KEY;
4022 break;
4023 case NL80211_AUTHTYPE_FT:
4024 auth_alg = WLAN_AUTH_FT;
4025 break;
4026 case NL80211_AUTHTYPE_NETWORK_EAP:
4027 auth_alg = WLAN_AUTH_LEAP;
4028 break;
4029 case NL80211_AUTHTYPE_SAE:
4030 auth_alg = WLAN_AUTH_SAE;
4031 break;
4032 default:
4033 return -EOPNOTSUPP;
4034 }
4035
4036 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4037 req->ie_len, GFP_KERNEL);
4038 if (!auth_data)
4039 return -ENOMEM;
4040
4041 auth_data->bss = req->bss;
4042
4043 if (req->sae_data_len >= 4) {
4044 __le16 *pos = (__le16 *) req->sae_data;
4045 auth_data->sae_trans = le16_to_cpu(pos[0]);
4046 auth_data->sae_status = le16_to_cpu(pos[1]);
4047 memcpy(auth_data->data, req->sae_data + 4,
4048 req->sae_data_len - 4);
4049 auth_data->data_len += req->sae_data_len - 4;
4050 }
4051
4052 if (req->ie && req->ie_len) {
4053 memcpy(&auth_data->data[auth_data->data_len],
4054 req->ie, req->ie_len);
4055 auth_data->data_len += req->ie_len;
4056 }
4057
4058 if (req->key && req->key_len) {
4059 auth_data->key_len = req->key_len;
4060 auth_data->key_idx = req->key_idx;
4061 memcpy(auth_data->key, req->key, req->key_len);
4062 }
4063
4064 auth_data->algorithm = auth_alg;
4065
4066 /* try to authenticate/probe */
4067
4068 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4069 ifmgd->assoc_data) {
4070 err = -EBUSY;
4071 goto err_free;
4072 }
4073
4074 if (ifmgd->auth_data)
4075 ieee80211_destroy_auth_data(sdata, false);
4076
4077 /* prep auth_data so we don't go into idle on disassoc */
4078 ifmgd->auth_data = auth_data;
4079
4080 if (ifmgd->associated) {
4081 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4082
4083 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4084 WLAN_REASON_UNSPECIFIED,
4085 false, frame_buf);
4086
4087 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4088 sizeof(frame_buf));
4089 }
4090
4091 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4092
4093 err = ieee80211_prep_connection(sdata, req->bss, false);
4094 if (err)
4095 goto err_clear;
4096
4097 err = ieee80211_probe_auth(sdata);
4098 if (err) {
4099 sta_info_destroy_addr(sdata, req->bss->bssid);
4100 goto err_clear;
4101 }
4102
4103 /* hold our own reference */
4104 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4105 return 0;
4106
4107 err_clear:
4108 memset(ifmgd->bssid, 0, ETH_ALEN);
4109 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4110 ifmgd->auth_data = NULL;
4111 err_free:
4112 kfree(auth_data);
4113 return err;
4114 }
4115
4116 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4117 struct cfg80211_assoc_request *req)
4118 {
4119 struct ieee80211_local *local = sdata->local;
4120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4121 struct ieee80211_bss *bss = (void *)req->bss->priv;
4122 struct ieee80211_mgd_assoc_data *assoc_data;
4123 const struct cfg80211_bss_ies *beacon_ies;
4124 struct ieee80211_supported_band *sband;
4125 const u8 *ssidie, *ht_ie, *vht_ie;
4126 int i, err;
4127
4128 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4129 if (!assoc_data)
4130 return -ENOMEM;
4131
4132 rcu_read_lock();
4133 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4134 if (!ssidie) {
4135 rcu_read_unlock();
4136 kfree(assoc_data);
4137 return -EINVAL;
4138 }
4139 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4140 assoc_data->ssid_len = ssidie[1];
4141 rcu_read_unlock();
4142
4143 if (ifmgd->associated) {
4144 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4145
4146 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4147 WLAN_REASON_UNSPECIFIED,
4148 false, frame_buf);
4149
4150 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4151 sizeof(frame_buf));
4152 }
4153
4154 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4155 err = -EBUSY;
4156 goto err_free;
4157 }
4158
4159 if (ifmgd->assoc_data) {
4160 err = -EBUSY;
4161 goto err_free;
4162 }
4163
4164 if (ifmgd->auth_data) {
4165 bool match;
4166
4167 /* keep sta info, bssid if matching */
4168 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4169 ieee80211_destroy_auth_data(sdata, match);
4170 }
4171
4172 /* prepare assoc data */
4173
4174 ifmgd->beacon_crc_valid = false;
4175
4176 /*
4177 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4178 * We still associate in non-HT mode (11a/b/g) if any one of these
4179 * ciphers is configured as pairwise.
4180 * We can set this to true for non-11n hardware, that'll be checked
4181 * separately along with the peer capabilities.
4182 */
4183 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4184 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4185 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4186 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4187 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4188 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4189 netdev_info(sdata->dev,
4190 "disabling HT/VHT due to WEP/TKIP use\n");
4191 }
4192 }
4193
4194 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4195 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4196 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4197 }
4198
4199 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4200 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4201
4202 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4203 sband = local->hw.wiphy->bands[req->bss->channel->band];
4204 if (!sband->ht_cap.ht_supported ||
4205 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4206 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4207 if (!bss->wmm_used)
4208 netdev_info(sdata->dev,
4209 "disabling HT as WMM/QoS is not supported by the AP\n");
4210 }
4211
4212 /* disable VHT if we don't support it or the AP doesn't use WMM */
4213 if (!sband->vht_cap.vht_supported ||
4214 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4215 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4216 if (!bss->wmm_used)
4217 netdev_info(sdata->dev,
4218 "disabling VHT as WMM/QoS is not supported by the AP\n");
4219 }
4220
4221 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4222 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4223 sizeof(ifmgd->ht_capa_mask));
4224
4225 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4226 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4227 sizeof(ifmgd->vht_capa_mask));
4228
4229 if (req->ie && req->ie_len) {
4230 memcpy(assoc_data->ie, req->ie, req->ie_len);
4231 assoc_data->ie_len = req->ie_len;
4232 }
4233
4234 assoc_data->bss = req->bss;
4235
4236 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4237 if (ifmgd->powersave)
4238 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4239 else
4240 sdata->smps_mode = IEEE80211_SMPS_OFF;
4241 } else
4242 sdata->smps_mode = ifmgd->req_smps;
4243
4244 assoc_data->capability = req->bss->capability;
4245 assoc_data->wmm = bss->wmm_used &&
4246 (local->hw.queues >= IEEE80211_NUM_ACS);
4247 assoc_data->supp_rates = bss->supp_rates;
4248 assoc_data->supp_rates_len = bss->supp_rates_len;
4249
4250 rcu_read_lock();
4251 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4252 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4253 assoc_data->ap_ht_param =
4254 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4255 else
4256 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4257 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4258 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4259 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4260 sizeof(struct ieee80211_vht_cap));
4261 else
4262 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263 rcu_read_unlock();
4264
4265 if (bss->wmm_used && bss->uapsd_supported &&
4266 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4267 sdata->wmm_acm != 0xff) {
4268 assoc_data->uapsd = true;
4269 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4270 } else {
4271 assoc_data->uapsd = false;
4272 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4273 }
4274
4275 if (req->prev_bssid)
4276 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4277
4278 if (req->use_mfp) {
4279 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4280 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4281 } else {
4282 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4283 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4284 }
4285
4286 if (req->crypto.control_port)
4287 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4288 else
4289 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4290
4291 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4292 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4293
4294 /* kick off associate process */
4295
4296 ifmgd->assoc_data = assoc_data;
4297 ifmgd->dtim_period = 0;
4298 ifmgd->have_beacon = false;
4299
4300 err = ieee80211_prep_connection(sdata, req->bss, true);
4301 if (err)
4302 goto err_clear;
4303
4304 rcu_read_lock();
4305 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4306
4307 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4308 !beacon_ies) {
4309 /*
4310 * Wait up to one beacon interval ...
4311 * should this be more if we miss one?
4312 */
4313 sdata_info(sdata, "waiting for beacon from %pM\n",
4314 ifmgd->bssid);
4315 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4316 assoc_data->timeout_started = true;
4317 assoc_data->need_beacon = true;
4318 } else if (beacon_ies) {
4319 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4320 beacon_ies->data,
4321 beacon_ies->len);
4322 u8 dtim_count = 0;
4323
4324 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4325 const struct ieee80211_tim_ie *tim;
4326 tim = (void *)(tim_ie + 2);
4327 ifmgd->dtim_period = tim->dtim_period;
4328 dtim_count = tim->dtim_count;
4329 }
4330 ifmgd->have_beacon = true;
4331 assoc_data->timeout = jiffies;
4332 assoc_data->timeout_started = true;
4333
4334 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4335 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4336 sdata->vif.bss_conf.sync_device_ts =
4337 bss->device_ts_beacon;
4338 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4339 }
4340 } else {
4341 assoc_data->timeout = jiffies;
4342 assoc_data->timeout_started = true;
4343 }
4344 rcu_read_unlock();
4345
4346 run_again(sdata, assoc_data->timeout);
4347
4348 if (bss->corrupt_data) {
4349 char *corrupt_type = "data";
4350 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4351 if (bss->corrupt_data &
4352 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4353 corrupt_type = "beacon and probe response";
4354 else
4355 corrupt_type = "beacon";
4356 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4357 corrupt_type = "probe response";
4358 sdata_info(sdata, "associating with AP with corrupt %s\n",
4359 corrupt_type);
4360 }
4361
4362 return 0;
4363 err_clear:
4364 memset(ifmgd->bssid, 0, ETH_ALEN);
4365 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4366 ifmgd->assoc_data = NULL;
4367 err_free:
4368 kfree(assoc_data);
4369 return err;
4370 }
4371
4372 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4373 struct cfg80211_deauth_request *req)
4374 {
4375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4376 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4377 bool tx = !req->local_state_change;
4378 bool report_frame = false;
4379
4380 sdata_info(sdata,
4381 "deauthenticating from %pM by local choice (reason=%d)\n",
4382 req->bssid, req->reason_code);
4383
4384 if (ifmgd->auth_data) {
4385 drv_mgd_prepare_tx(sdata->local, sdata);
4386 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4387 IEEE80211_STYPE_DEAUTH,
4388 req->reason_code, tx,
4389 frame_buf);
4390 ieee80211_destroy_auth_data(sdata, false);
4391
4392 report_frame = true;
4393 goto out;
4394 }
4395
4396 if (ifmgd->associated &&
4397 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4398 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4399 req->reason_code, tx, frame_buf);
4400 report_frame = true;
4401 }
4402
4403 out:
4404 if (report_frame)
4405 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4406 IEEE80211_DEAUTH_FRAME_LEN);
4407
4408 return 0;
4409 }
4410
4411 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4412 struct cfg80211_disassoc_request *req)
4413 {
4414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4415 u8 bssid[ETH_ALEN];
4416 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4417
4418 /*
4419 * cfg80211 should catch this ... but it's racy since
4420 * we can receive a disassoc frame, process it, hand it
4421 * to cfg80211 while that's in a locked section already
4422 * trying to tell us that the user wants to disconnect.
4423 */
4424 if (ifmgd->associated != req->bss)
4425 return -ENOLINK;
4426
4427 sdata_info(sdata,
4428 "disassociating from %pM by local choice (reason=%d)\n",
4429 req->bss->bssid, req->reason_code);
4430
4431 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4432 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4433 req->reason_code, !req->local_state_change,
4434 frame_buf);
4435
4436 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4437 IEEE80211_DEAUTH_FRAME_LEN);
4438
4439 return 0;
4440 }
4441
4442 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4443 {
4444 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4445
4446 /*
4447 * Make sure some work items will not run after this,
4448 * they will not do anything but might not have been
4449 * cancelled when disconnecting.
4450 */
4451 cancel_work_sync(&ifmgd->monitor_work);
4452 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4453 cancel_work_sync(&ifmgd->request_smps_work);
4454 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4455 cancel_work_sync(&ifmgd->chswitch_work);
4456
4457 sdata_lock(sdata);
4458 if (ifmgd->assoc_data) {
4459 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4460 ieee80211_destroy_assoc_data(sdata, false);
4461 cfg80211_assoc_timeout(sdata->dev, bss);
4462 }
4463 if (ifmgd->auth_data)
4464 ieee80211_destroy_auth_data(sdata, false);
4465 del_timer_sync(&ifmgd->timer);
4466 sdata_unlock(sdata);
4467 }
4468
4469 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4470 enum nl80211_cqm_rssi_threshold_event rssi_event,
4471 gfp_t gfp)
4472 {
4473 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4474
4475 trace_api_cqm_rssi_notify(sdata, rssi_event);
4476
4477 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4478 }
4479 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linus' kernel tree