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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / net / mac80211 / mlme.c
blobbcf5ffc1567a4ff1c6054f7aecc0aa28dfd2c3fa
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 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 * Copyright (C) 2018 Intel Corporation
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17 #include <linux/delay.h>
18 #include <linux/if_ether.h>
19 #include <linux/skbuff.h>
20 #include <linux/if_arp.h>
21 #include <linux/etherdevice.h>
22 #include <linux/moduleparam.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/crc32.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <net/mac80211.h>
28 #include <asm/unaligned.h>
29
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
32 #include "rate.h"
33 #include "led.h"
34 #include "fils_aead.h"
35
36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
40 #define IEEE80211_AUTH_MAX_TRIES 3
41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
42 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
43 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
44 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
45 #define IEEE80211_ASSOC_MAX_TRIES 3
46
47 static int max_nullfunc_tries = 2;
48 module_param(max_nullfunc_tries, int, 0644);
49 MODULE_PARM_DESC(max_nullfunc_tries,
50 "Maximum nullfunc tx tries before disconnecting (reason 4).");
51
52 static int max_probe_tries = 5;
53 module_param(max_probe_tries, int, 0644);
54 MODULE_PARM_DESC(max_probe_tries,
55 "Maximum probe tries before disconnecting (reason 4).");
56
57 /*
58 * Beacon loss timeout is calculated as N frames times the
59 * advertised beacon interval. This may need to be somewhat
60 * higher than what hardware might detect to account for
61 * delays in the host processing frames. But since we also
62 * probe on beacon miss before declaring the connection lost
63 * default to what we want.
64 */
65 static int beacon_loss_count = 7;
66 module_param(beacon_loss_count, int, 0644);
67 MODULE_PARM_DESC(beacon_loss_count,
68 "Number of beacon intervals before we decide beacon was lost.");
69
70 /*
71 * Time the connection can be idle before we probe
72 * it to see if we can still talk to the AP.
73 */
74 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
75 /*
76 * Time we wait for a probe response after sending
77 * a probe request because of beacon loss or for
78 * checking the connection still works.
79 */
80 static int probe_wait_ms = 500;
81 module_param(probe_wait_ms, int, 0644);
82 MODULE_PARM_DESC(probe_wait_ms,
83 "Maximum time(ms) to wait for probe response"
84 " before disconnecting (reason 4).");
85
86 /*
87 * How many Beacon frames need to have been used in average signal strength
88 * before starting to indicate signal change events.
89 */
90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
91
92 /*
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
100 * do that.
101 */
102 static void run_again(struct ieee80211_sub_if_data *sdata,
103 unsigned long timeout)
104 {
105 sdata_assert_lock(sdata);
106
107 if (!timer_pending(&sdata->u.mgd.timer) ||
108 time_before(timeout, sdata->u.mgd.timer.expires))
109 mod_timer(&sdata->u.mgd.timer, timeout);
110 }
111
112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
113 {
114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
115 return;
116
117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
118 return;
119
120 mod_timer(&sdata->u.mgd.bcn_mon_timer,
121 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
122 }
123
124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
125 {
126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
127
128 if (unlikely(!ifmgd->associated))
129 return;
130
131 if (ifmgd->probe_send_count)
132 ifmgd->probe_send_count = 0;
133
134 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
135 return;
136
137 mod_timer(&ifmgd->conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
139 }
140
141 static int ecw2cw(int ecw)
142 {
143 return (1 << ecw) - 1;
144 }
145
146 static u32
147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
148 struct ieee80211_supported_band *sband,
149 struct ieee80211_channel *channel,
150 const struct ieee80211_ht_operation *ht_oper,
151 const struct ieee80211_vht_operation *vht_oper,
152 const struct ieee80211_he_operation *he_oper,
153 struct cfg80211_chan_def *chandef, bool tracking)
154 {
155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156 struct cfg80211_chan_def vht_chandef;
157 struct ieee80211_sta_ht_cap sta_ht_cap;
158 u32 ht_cfreq, ret;
159
160 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
161 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
162
163 chandef->chan = channel;
164 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
165 chandef->center_freq1 = channel->center_freq;
166 chandef->center_freq2 = 0;
167
168 if (!ht_oper || !sta_ht_cap.ht_supported) {
169 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
170 goto out;
171 }
172
173 chandef->width = NL80211_CHAN_WIDTH_20;
174
175 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
176 channel->band);
177 /* check that channel matches the right operating channel */
178 if (!tracking && channel->center_freq != ht_cfreq) {
179 /*
180 * It's possible that some APs are confused here;
181 * Netgear WNDR3700 sometimes reports 4 higher than
182 * the actual channel in association responses, but
183 * since we look at probe response/beacon data here
184 * it should be OK.
185 */
186 sdata_info(sdata,
187 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
188 channel->center_freq, ht_cfreq,
189 ht_oper->primary_chan, channel->band);
190 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
191 goto out;
192 }
193
194 /* check 40 MHz support, if we have it */
195 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
196 ieee80211_chandef_ht_oper(ht_oper, chandef);
197 } else {
198 /* 40 MHz (and 80 MHz) must be supported for VHT */
199 ret = IEEE80211_STA_DISABLE_VHT;
200 /* also mark 40 MHz disabled */
201 ret |= IEEE80211_STA_DISABLE_40MHZ;
202 goto out;
203 }
204
205 if (!vht_oper || !sband->vht_cap.vht_supported) {
206 ret = IEEE80211_STA_DISABLE_VHT;
207 goto out;
208 }
209
210 vht_chandef = *chandef;
211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
212 (le32_to_cpu(he_oper->he_oper_params) &
213 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
214 struct ieee80211_vht_operation he_oper_vht_cap;
215
216 /*
217 * Set only first 3 bytes (other 2 aren't used in
218 * ieee80211_chandef_vht_oper() anyway)
219 */
220 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
221 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
222
223 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
224 &he_oper_vht_cap, ht_oper,
225 &vht_chandef)) {
226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
227 sdata_info(sdata,
228 "HE AP VHT information is invalid, disable HE\n");
229 ret = IEEE80211_STA_DISABLE_HE;
230 goto out;
231 }
232 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
233 ht_oper, &vht_chandef)) {
234 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
235 sdata_info(sdata,
236 "AP VHT information is invalid, disable VHT\n");
237 ret = IEEE80211_STA_DISABLE_VHT;
238 goto out;
239 }
240
241 if (!cfg80211_chandef_valid(&vht_chandef)) {
242 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
243 sdata_info(sdata,
244 "AP VHT information is invalid, disable VHT\n");
245 ret = IEEE80211_STA_DISABLE_VHT;
246 goto out;
247 }
248
249 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
250 ret = 0;
251 goto out;
252 }
253
254 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
256 sdata_info(sdata,
257 "AP VHT information doesn't match HT, disable VHT\n");
258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 *chandef = vht_chandef;
263
264 ret = 0;
265
266 out:
267 /*
268 * When tracking the current AP, don't do any further checks if the
269 * new chandef is identical to the one we're currently using for the
270 * connection. This keeps us from playing ping-pong with regulatory,
271 * without it the following can happen (for example):
272 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
273 * - AP advertises regdom US
274 * - CRDA loads regdom US with 80 MHz prohibited (old database)
275 * - the code below detects an unsupported channel, downgrades, and
276 * we disconnect from the AP in the caller
277 * - disconnect causes CRDA to reload world regdomain and the game
278 * starts anew.
279 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
280 *
281 * It seems possible that there are still scenarios with CSA or real
282 * bandwidth changes where a this could happen, but those cases are
283 * less common and wouldn't completely prevent using the AP.
284 */
285 if (tracking &&
286 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
287 return ret;
288
289 /* don't print the message below for VHT mismatch if VHT is disabled */
290 if (ret & IEEE80211_STA_DISABLE_VHT)
291 vht_chandef = *chandef;
292
293 /*
294 * Ignore the DISABLED flag when we're already connected and only
295 * tracking the APs beacon for bandwidth changes - otherwise we
296 * might get disconnected here if we connect to an AP, update our
297 * regulatory information based on the AP's country IE and the
298 * information we have is wrong/outdated and disables the channel
299 * that we're actually using for the connection to the AP.
300 */
301 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
302 tracking ? 0 :
303 IEEE80211_CHAN_DISABLED)) {
304 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
305 ret = IEEE80211_STA_DISABLE_HT |
306 IEEE80211_STA_DISABLE_VHT;
307 break;
308 }
309
310 ret |= ieee80211_chandef_downgrade(chandef);
311 }
312
313 if (chandef->width != vht_chandef.width && !tracking)
314 sdata_info(sdata,
315 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
316
317 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
318 return ret;
319 }
320
321 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
322 struct sta_info *sta,
323 const struct ieee80211_ht_cap *ht_cap,
324 const struct ieee80211_ht_operation *ht_oper,
325 const struct ieee80211_vht_operation *vht_oper,
326 const struct ieee80211_he_operation *he_oper,
327 const u8 *bssid, u32 *changed)
328 {
329 struct ieee80211_local *local = sdata->local;
330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
331 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
332 struct ieee80211_supported_band *sband =
333 local->hw.wiphy->bands[chan->band];
334 struct cfg80211_chan_def chandef;
335 u16 ht_opmode;
336 u32 flags;
337 enum ieee80211_sta_rx_bandwidth new_sta_bw;
338 int ret;
339
340 /* if HT was/is disabled, don't track any bandwidth changes */
341 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
342 return 0;
343
344 /* don't check VHT if we associated as non-VHT station */
345 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
346 vht_oper = NULL;
347
348 /* don't check HE if we associated as non-HE station */
349 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
350 !ieee80211_get_he_sta_cap(sband))
351 he_oper = NULL;
352
353 if (WARN_ON_ONCE(!sta))
354 return -EINVAL;
355
356 /*
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
359 */
360 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
362 *changed |= BSS_CHANGED_HT;
363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
364 }
365
366 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
367 flags = ieee80211_determine_chantype(sdata, sband, chan,
368 ht_oper, vht_oper, he_oper,
369 &chandef, true);
370
371 /*
372 * Downgrade the new channel if we associated with restricted
373 * capabilities. For example, if we associated as a 20 MHz STA
374 * to a 40 MHz AP (due to regulatory, capabilities or config
375 * reasons) then switching to a 40 MHz channel now won't do us
376 * any good -- we couldn't use it with the AP.
377 */
378 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
379 chandef.width == NL80211_CHAN_WIDTH_80P80)
380 flags |= ieee80211_chandef_downgrade(&chandef);
381 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
382 chandef.width == NL80211_CHAN_WIDTH_160)
383 flags |= ieee80211_chandef_downgrade(&chandef);
384 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
385 chandef.width > NL80211_CHAN_WIDTH_20)
386 flags |= ieee80211_chandef_downgrade(&chandef);
387
388 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
389 return 0;
390
391 sdata_info(sdata,
392 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
393 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
394 chandef.center_freq1, chandef.center_freq2);
395
396 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
397 IEEE80211_STA_DISABLE_VHT |
398 IEEE80211_STA_DISABLE_40MHZ |
399 IEEE80211_STA_DISABLE_80P80MHZ |
400 IEEE80211_STA_DISABLE_160MHZ)) ||
401 !cfg80211_chandef_valid(&chandef)) {
402 sdata_info(sdata,
403 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
404 ifmgd->bssid);
405 return -EINVAL;
406 }
407
408 switch (chandef.width) {
409 case NL80211_CHAN_WIDTH_20_NOHT:
410 case NL80211_CHAN_WIDTH_20:
411 new_sta_bw = IEEE80211_STA_RX_BW_20;
412 break;
413 case NL80211_CHAN_WIDTH_40:
414 new_sta_bw = IEEE80211_STA_RX_BW_40;
415 break;
416 case NL80211_CHAN_WIDTH_80:
417 new_sta_bw = IEEE80211_STA_RX_BW_80;
418 break;
419 case NL80211_CHAN_WIDTH_80P80:
420 case NL80211_CHAN_WIDTH_160:
421 new_sta_bw = IEEE80211_STA_RX_BW_160;
422 break;
423 default:
424 return -EINVAL;
425 }
426
427 if (new_sta_bw > sta->cur_max_bandwidth)
428 new_sta_bw = sta->cur_max_bandwidth;
429
430 if (new_sta_bw < sta->sta.bandwidth) {
431 sta->sta.bandwidth = new_sta_bw;
432 rate_control_rate_update(local, sband, sta,
433 IEEE80211_RC_BW_CHANGED);
434 }
435
436 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
437 if (ret) {
438 sdata_info(sdata,
439 "AP %pM changed bandwidth to incompatible one - disconnect\n",
440 ifmgd->bssid);
441 return ret;
442 }
443
444 if (new_sta_bw > sta->sta.bandwidth) {
445 sta->sta.bandwidth = new_sta_bw;
446 rate_control_rate_update(local, sband, sta,
447 IEEE80211_RC_BW_CHANGED);
448 }
449
450 return 0;
451 }
452
453 /* frame sending functions */
454
455 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
456 struct sk_buff *skb, u8 ap_ht_param,
457 struct ieee80211_supported_band *sband,
458 struct ieee80211_channel *channel,
459 enum ieee80211_smps_mode smps)
460 {
461 u8 *pos;
462 u32 flags = channel->flags;
463 u16 cap;
464 struct ieee80211_sta_ht_cap ht_cap;
465
466 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
467
468 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
469 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
470
471 /* determine capability flags */
472 cap = ht_cap.cap;
473
474 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
475 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
476 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
477 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
478 cap &= ~IEEE80211_HT_CAP_SGI_40;
479 }
480 break;
481 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
482 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
483 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
484 cap &= ~IEEE80211_HT_CAP_SGI_40;
485 }
486 break;
487 }
488
489 /*
490 * If 40 MHz was disabled associate as though we weren't
491 * capable of 40 MHz -- some broken APs will never fall
492 * back to trying to transmit in 20 MHz.
493 */
494 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498
499 /* set SM PS mode properly */
500 cap &= ~IEEE80211_HT_CAP_SM_PS;
501 switch (smps) {
502 case IEEE80211_SMPS_AUTOMATIC:
503 case IEEE80211_SMPS_NUM_MODES:
504 WARN_ON(1);
505 /* fall through */
506 case IEEE80211_SMPS_OFF:
507 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
508 IEEE80211_HT_CAP_SM_PS_SHIFT;
509 break;
510 case IEEE80211_SMPS_STATIC:
511 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
512 IEEE80211_HT_CAP_SM_PS_SHIFT;
513 break;
514 case IEEE80211_SMPS_DYNAMIC:
515 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
516 IEEE80211_HT_CAP_SM_PS_SHIFT;
517 break;
518 }
519
520 /* reserve and fill IE */
521 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
522 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
523 }
524
525 /* This function determines vht capability flags for the association
526 * and builds the IE.
527 * Note - the function may set the owner of the MU-MIMO capability
528 */
529 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
530 struct sk_buff *skb,
531 struct ieee80211_supported_band *sband,
532 struct ieee80211_vht_cap *ap_vht_cap)
533 {
534 struct ieee80211_local *local = sdata->local;
535 u8 *pos;
536 u32 cap;
537 struct ieee80211_sta_vht_cap vht_cap;
538 u32 mask, ap_bf_sts, our_bf_sts;
539
540 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
541
542 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
543 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
544
545 /* determine capability flags */
546 cap = vht_cap.cap;
547
548 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
549 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
550
551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
552 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
553 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
554 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
555 }
556
557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
558 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560 }
561
562 /*
563 * Some APs apparently get confused if our capabilities are better
564 * than theirs, so restrict what we advertise in the assoc request.
565 */
566 if (!(ap_vht_cap->vht_cap_info &
567 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
568 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
569 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
570 else if (!(ap_vht_cap->vht_cap_info &
571 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
572 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
573
574 /*
575 * If some other vif is using the MU-MIMO capablity we cannot associate
576 * using MU-MIMO - this will lead to contradictions in the group-id
577 * mechanism.
578 * Ownership is defined since association request, in order to avoid
579 * simultaneous associations with MU-MIMO.
580 */
581 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
582 bool disable_mu_mimo = false;
583 struct ieee80211_sub_if_data *other;
584
585 list_for_each_entry_rcu(other, &local->interfaces, list) {
586 if (other->vif.mu_mimo_owner) {
587 disable_mu_mimo = true;
588 break;
589 }
590 }
591 if (disable_mu_mimo)
592 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
593 else
594 sdata->vif.mu_mimo_owner = true;
595 }
596
597 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
598
599 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
600 our_bf_sts = cap & mask;
601
602 if (ap_bf_sts < our_bf_sts) {
603 cap &= ~mask;
604 cap |= ap_bf_sts;
605 }
606
607 /* reserve and fill IE */
608 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
609 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
610 }
611
612 /* This function determines HE capability flags for the association
613 * and builds the IE.
614 */
615 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
616 struct sk_buff *skb,
617 struct ieee80211_supported_band *sband)
618 {
619 u8 *pos;
620 const struct ieee80211_sta_he_cap *he_cap = NULL;
621 u8 he_cap_size;
622
623 he_cap = ieee80211_get_he_sta_cap(sband);
624 if (!he_cap)
625 return;
626
627 /*
628 * TODO: the 1 added is because this temporarily is under the EXTENSION
629 * IE. Get rid of it when it moves.
630 */
631 he_cap_size =
632 2 + 1 + sizeof(he_cap->he_cap_elem) +
633 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
634 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
635 he_cap->he_cap_elem.phy_cap_info);
636 pos = skb_put(skb, he_cap_size);
637 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
638 }
639
640 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
641 {
642 struct ieee80211_local *local = sdata->local;
643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
644 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
645 struct sk_buff *skb;
646 struct ieee80211_mgmt *mgmt;
647 u8 *pos, qos_info;
648 size_t offset = 0, noffset;
649 int i, count, rates_len, supp_rates_len, shift;
650 u16 capab;
651 struct ieee80211_supported_band *sband;
652 struct ieee80211_chanctx_conf *chanctx_conf;
653 struct ieee80211_channel *chan;
654 u32 rates = 0;
655
656 sdata_assert_lock(sdata);
657
658 rcu_read_lock();
659 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
660 if (WARN_ON(!chanctx_conf)) {
661 rcu_read_unlock();
662 return;
663 }
664 chan = chanctx_conf->def.chan;
665 rcu_read_unlock();
666 sband = local->hw.wiphy->bands[chan->band];
667 shift = ieee80211_vif_get_shift(&sdata->vif);
668
669 if (assoc_data->supp_rates_len) {
670 /*
671 * Get all rates supported by the device and the AP as
672 * some APs don't like getting a superset of their rates
673 * in the association request (e.g. D-Link DAP 1353 in
674 * b-only mode)...
675 */
676 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
677 assoc_data->supp_rates,
678 assoc_data->supp_rates_len,
679 &rates);
680 } else {
681 /*
682 * In case AP not provide any supported rates information
683 * before association, we send information element(s) with
684 * all rates that we support.
685 */
686 rates_len = 0;
687 for (i = 0; i < sband->n_bitrates; i++) {
688 rates |= BIT(i);
689 rates_len++;
690 }
691 }
692
693 skb = alloc_skb(local->hw.extra_tx_headroom +
694 sizeof(*mgmt) + /* bit too much but doesn't matter */
695 2 + assoc_data->ssid_len + /* SSID */
696 4 + rates_len + /* (extended) rates */
697 4 + /* power capability */
698 2 + 2 * sband->n_channels + /* supported channels */
699 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
700 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
701 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
702 sizeof(struct ieee80211_he_mcs_nss_supp) +
703 IEEE80211_HE_PPE_THRES_MAX_LEN +
704 assoc_data->ie_len + /* extra IEs */
705 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
706 9, /* WMM */
707 GFP_KERNEL);
708 if (!skb)
709 return;
710
711 skb_reserve(skb, local->hw.extra_tx_headroom);
712
713 capab = WLAN_CAPABILITY_ESS;
714
715 if (sband->band == NL80211_BAND_2GHZ) {
716 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
717 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
718 }
719
720 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
721 capab |= WLAN_CAPABILITY_PRIVACY;
722
723 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
724 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
725 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
726
727 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
728 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
729
730 mgmt = skb_put_zero(skb, 24);
731 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
732 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
733 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
734
735 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
736 skb_put(skb, 10);
737 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
738 IEEE80211_STYPE_REASSOC_REQ);
739 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
740 mgmt->u.reassoc_req.listen_interval =
741 cpu_to_le16(local->hw.conf.listen_interval);
742 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
743 ETH_ALEN);
744 } else {
745 skb_put(skb, 4);
746 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
747 IEEE80211_STYPE_ASSOC_REQ);
748 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
749 mgmt->u.assoc_req.listen_interval =
750 cpu_to_le16(local->hw.conf.listen_interval);
751 }
752
753 /* SSID */
754 pos = skb_put(skb, 2 + assoc_data->ssid_len);
755 *pos++ = WLAN_EID_SSID;
756 *pos++ = assoc_data->ssid_len;
757 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
758
759 /* add all rates which were marked to be used above */
760 supp_rates_len = rates_len;
761 if (supp_rates_len > 8)
762 supp_rates_len = 8;
763
764 pos = skb_put(skb, supp_rates_len + 2);
765 *pos++ = WLAN_EID_SUPP_RATES;
766 *pos++ = supp_rates_len;
767
768 count = 0;
769 for (i = 0; i < sband->n_bitrates; i++) {
770 if (BIT(i) & rates) {
771 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
772 5 * (1 << shift));
773 *pos++ = (u8) rate;
774 if (++count == 8)
775 break;
776 }
777 }
778
779 if (rates_len > count) {
780 pos = skb_put(skb, rates_len - count + 2);
781 *pos++ = WLAN_EID_EXT_SUPP_RATES;
782 *pos++ = rates_len - count;
783
784 for (i++; i < sband->n_bitrates; i++) {
785 if (BIT(i) & rates) {
786 int rate;
787 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
788 5 * (1 << shift));
789 *pos++ = (u8) rate;
790 }
791 }
792 }
793
794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
795 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
796 pos = skb_put(skb, 4);
797 *pos++ = WLAN_EID_PWR_CAPABILITY;
798 *pos++ = 2;
799 *pos++ = 0; /* min tx power */
800 /* max tx power */
801 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
802 }
803
804 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
805 /* TODO: get this in reg domain format */
806 pos = skb_put(skb, 2 * sband->n_channels + 2);
807 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
808 *pos++ = 2 * sband->n_channels;
809 for (i = 0; i < sband->n_channels; i++) {
810 *pos++ = ieee80211_frequency_to_channel(
811 sband->channels[i].center_freq);
812 *pos++ = 1; /* one channel in the subband*/
813 }
814 }
815
816 /* if present, add any custom IEs that go before HT */
817 if (assoc_data->ie_len) {
818 static const u8 before_ht[] = {
819 WLAN_EID_SSID,
820 WLAN_EID_SUPP_RATES,
821 WLAN_EID_EXT_SUPP_RATES,
822 WLAN_EID_PWR_CAPABILITY,
823 WLAN_EID_SUPPORTED_CHANNELS,
824 WLAN_EID_RSN,
825 WLAN_EID_QOS_CAPA,
826 WLAN_EID_RRM_ENABLED_CAPABILITIES,
827 WLAN_EID_MOBILITY_DOMAIN,
828 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
829 WLAN_EID_RIC_DATA, /* reassoc only */
830 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
831 };
832 static const u8 after_ric[] = {
833 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
834 WLAN_EID_HT_CAPABILITY,
835 WLAN_EID_BSS_COEX_2040,
836 /* luckily this is almost always there */
837 WLAN_EID_EXT_CAPABILITY,
838 WLAN_EID_QOS_TRAFFIC_CAPA,
839 WLAN_EID_TIM_BCAST_REQ,
840 WLAN_EID_INTERWORKING,
841 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
842 WLAN_EID_VHT_CAPABILITY,
843 WLAN_EID_OPMODE_NOTIF,
844 };
845
846 noffset = ieee80211_ie_split_ric(assoc_data->ie,
847 assoc_data->ie_len,
848 before_ht,
849 ARRAY_SIZE(before_ht),
850 after_ric,
851 ARRAY_SIZE(after_ric),
852 offset);
853 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
854 offset = noffset;
855 }
856
857 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
858 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
859 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
860
861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
862 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
863 sband, chan, sdata->smps_mode);
864
865 /* if present, add any custom IEs that go before VHT */
866 if (assoc_data->ie_len) {
867 static const u8 before_vht[] = {
868 /*
869 * no need to list the ones split off before HT
870 * or generated here
871 */
872 WLAN_EID_BSS_COEX_2040,
873 WLAN_EID_EXT_CAPABILITY,
874 WLAN_EID_QOS_TRAFFIC_CAPA,
875 WLAN_EID_TIM_BCAST_REQ,
876 WLAN_EID_INTERWORKING,
877 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
878 };
879
880 /* RIC already taken above, so no need to handle here anymore */
881 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
882 before_vht, ARRAY_SIZE(before_vht),
883 offset);
884 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
885 offset = noffset;
886 }
887
888 /* if present, add any custom IEs that go before HE */
889 if (assoc_data->ie_len) {
890 static const u8 before_he[] = {
891 /*
892 * no need to list the ones split off before VHT
893 * or generated here
894 */
895 WLAN_EID_OPMODE_NOTIF,
896 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
897 /* 11ai elements */
898 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
899 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
900 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
901 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
902 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
903 /* TODO: add 11ah/11aj/11ak elements */
904 };
905
906 /* RIC already taken above, so no need to handle here anymore */
907 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
908 before_he, ARRAY_SIZE(before_he),
909 offset);
910 pos = skb_put(skb, noffset - offset);
911 memcpy(pos, assoc_data->ie + offset, noffset - offset);
912 offset = noffset;
913 }
914
915 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
916 ieee80211_add_vht_ie(sdata, skb, sband,
917 &assoc_data->ap_vht_cap);
918
919 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
920 ieee80211_add_he_ie(sdata, skb, sband);
921
922 /* if present, add any custom non-vendor IEs that go after HE */
923 if (assoc_data->ie_len) {
924 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
925 assoc_data->ie_len,
926 offset);
927 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
928 offset = noffset;
929 }
930
931 if (assoc_data->wmm) {
932 if (assoc_data->uapsd) {
933 qos_info = ifmgd->uapsd_queues;
934 qos_info |= (ifmgd->uapsd_max_sp_len <<
935 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
936 } else {
937 qos_info = 0;
938 }
939
940 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
941 }
942
943 /* add any remaining custom (i.e. vendor specific here) IEs */
944 if (assoc_data->ie_len) {
945 noffset = assoc_data->ie_len;
946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
947 }
948
949 if (assoc_data->fils_kek_len &&
950 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
951 dev_kfree_skb(skb);
952 return;
953 }
954
955 drv_mgd_prepare_tx(local, sdata, 0);
956
957 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
958 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
960 IEEE80211_TX_INTFL_MLME_CONN_TX;
961 ieee80211_tx_skb(sdata, skb);
962 }
963
964 void ieee80211_send_pspoll(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
966 {
967 struct ieee80211_pspoll *pspoll;
968 struct sk_buff *skb;
969
970 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
971 if (!skb)
972 return;
973
974 pspoll = (struct ieee80211_pspoll *) skb->data;
975 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
976
977 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
978 ieee80211_tx_skb(sdata, skb);
979 }
980
981 void ieee80211_send_nullfunc(struct ieee80211_local *local,
982 struct ieee80211_sub_if_data *sdata,
983 bool powersave)
984 {
985 struct sk_buff *skb;
986 struct ieee80211_hdr_3addr *nullfunc;
987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
988
989 /* Don't send NDPs when STA is connected HE */
990 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
991 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
992 return;
993
994 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
995 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
996 if (!skb)
997 return;
998
999 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1000 if (powersave)
1001 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1002
1003 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1004 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1005
1006 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1007 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1008
1009 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1010 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1011
1012 ieee80211_tx_skb(sdata, skb);
1013 }
1014
1015 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1016 struct ieee80211_sub_if_data *sdata)
1017 {
1018 struct sk_buff *skb;
1019 struct ieee80211_hdr *nullfunc;
1020 __le16 fc;
1021
1022 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1023 return;
1024
1025 /* Don't send NDPs when connected HE */
1026 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1027 return;
1028
1029 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1030 if (!skb)
1031 return;
1032
1033 skb_reserve(skb, local->hw.extra_tx_headroom);
1034
1035 nullfunc = skb_put_zero(skb, 30);
1036 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1037 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1038 nullfunc->frame_control = fc;
1039 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1040 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1041 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1042 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1043
1044 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1045 ieee80211_tx_skb(sdata, skb);
1046 }
1047
1048 /* spectrum management related things */
1049 static void ieee80211_chswitch_work(struct work_struct *work)
1050 {
1051 struct ieee80211_sub_if_data *sdata =
1052 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1053 struct ieee80211_local *local = sdata->local;
1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1055 int ret;
1056
1057 if (!ieee80211_sdata_running(sdata))
1058 return;
1059
1060 sdata_lock(sdata);
1061 mutex_lock(&local->mtx);
1062 mutex_lock(&local->chanctx_mtx);
1063
1064 if (!ifmgd->associated)
1065 goto out;
1066
1067 if (!sdata->vif.csa_active)
1068 goto out;
1069
1070 /*
1071 * using reservation isn't immediate as it may be deferred until later
1072 * with multi-vif. once reservation is complete it will re-schedule the
1073 * work with no reserved_chanctx so verify chandef to check if it
1074 * completed successfully
1075 */
1076
1077 if (sdata->reserved_chanctx) {
1078 struct ieee80211_supported_band *sband = NULL;
1079 struct sta_info *mgd_sta = NULL;
1080 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1081
1082 /*
1083 * with multi-vif csa driver may call ieee80211_csa_finish()
1084 * many times while waiting for other interfaces to use their
1085 * reservations
1086 */
1087 if (sdata->reserved_ready)
1088 goto out;
1089
1090 if (sdata->vif.bss_conf.chandef.width !=
1091 sdata->csa_chandef.width) {
1092 /*
1093 * For managed interface, we need to also update the AP
1094 * station bandwidth and align the rate scale algorithm
1095 * on the bandwidth change. Here we only consider the
1096 * bandwidth of the new channel definition (as channel
1097 * switch flow does not have the full HT/VHT/HE
1098 * information), assuming that if additional changes are
1099 * required they would be done as part of the processing
1100 * of the next beacon from the AP.
1101 */
1102 switch (sdata->csa_chandef.width) {
1103 case NL80211_CHAN_WIDTH_20_NOHT:
1104 case NL80211_CHAN_WIDTH_20:
1105 default:
1106 bw = IEEE80211_STA_RX_BW_20;
1107 break;
1108 case NL80211_CHAN_WIDTH_40:
1109 bw = IEEE80211_STA_RX_BW_40;
1110 break;
1111 case NL80211_CHAN_WIDTH_80:
1112 bw = IEEE80211_STA_RX_BW_80;
1113 break;
1114 case NL80211_CHAN_WIDTH_80P80:
1115 case NL80211_CHAN_WIDTH_160:
1116 bw = IEEE80211_STA_RX_BW_160;
1117 break;
1118 }
1119
1120 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1121 sband =
1122 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1123 }
1124
1125 if (sdata->vif.bss_conf.chandef.width >
1126 sdata->csa_chandef.width) {
1127 mgd_sta->sta.bandwidth = bw;
1128 rate_control_rate_update(local, sband, mgd_sta,
1129 IEEE80211_RC_BW_CHANGED);
1130 }
1131
1132 ret = ieee80211_vif_use_reserved_context(sdata);
1133 if (ret) {
1134 sdata_info(sdata,
1135 "failed to use reserved channel context, disconnecting (err=%d)\n",
1136 ret);
1137 ieee80211_queue_work(&sdata->local->hw,
1138 &ifmgd->csa_connection_drop_work);
1139 goto out;
1140 }
1141
1142 if (sdata->vif.bss_conf.chandef.width <
1143 sdata->csa_chandef.width) {
1144 mgd_sta->sta.bandwidth = bw;
1145 rate_control_rate_update(local, sband, mgd_sta,
1146 IEEE80211_RC_BW_CHANGED);
1147 }
1148
1149 goto out;
1150 }
1151
1152 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1153 &sdata->csa_chandef)) {
1154 sdata_info(sdata,
1155 "failed to finalize channel switch, disconnecting\n");
1156 ieee80211_queue_work(&sdata->local->hw,
1157 &ifmgd->csa_connection_drop_work);
1158 goto out;
1159 }
1160
1161 /* XXX: shouldn't really modify cfg80211-owned data! */
1162 ifmgd->associated->channel = sdata->csa_chandef.chan;
1163
1164 ifmgd->csa_waiting_bcn = true;
1165
1166 ieee80211_sta_reset_beacon_monitor(sdata);
1167 ieee80211_sta_reset_conn_monitor(sdata);
1168
1169 out:
1170 mutex_unlock(&local->chanctx_mtx);
1171 mutex_unlock(&local->mtx);
1172 sdata_unlock(sdata);
1173 }
1174
1175 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1176 {
1177 struct ieee80211_local *local = sdata->local;
1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1179 int ret;
1180
1181 sdata_assert_lock(sdata);
1182
1183 WARN_ON(!sdata->vif.csa_active);
1184
1185 if (sdata->csa_block_tx) {
1186 ieee80211_wake_vif_queues(local, sdata,
1187 IEEE80211_QUEUE_STOP_REASON_CSA);
1188 sdata->csa_block_tx = false;
1189 }
1190
1191 sdata->vif.csa_active = false;
1192 ifmgd->csa_waiting_bcn = false;
1193
1194 ret = drv_post_channel_switch(sdata);
1195 if (ret) {
1196 sdata_info(sdata,
1197 "driver post channel switch failed, disconnecting\n");
1198 ieee80211_queue_work(&local->hw,
1199 &ifmgd->csa_connection_drop_work);
1200 return;
1201 }
1202
1203 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1204 }
1205
1206 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1207 {
1208 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1210
1211 trace_api_chswitch_done(sdata, success);
1212 if (!success) {
1213 sdata_info(sdata,
1214 "driver channel switch failed, disconnecting\n");
1215 ieee80211_queue_work(&sdata->local->hw,
1216 &ifmgd->csa_connection_drop_work);
1217 } else {
1218 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1219 }
1220 }
1221 EXPORT_SYMBOL(ieee80211_chswitch_done);
1222
1223 static void ieee80211_chswitch_timer(struct timer_list *t)
1224 {
1225 struct ieee80211_sub_if_data *sdata =
1226 from_timer(sdata, t, u.mgd.chswitch_timer);
1227
1228 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1229 }
1230
1231 static void
1232 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1233 u64 timestamp, u32 device_timestamp,
1234 struct ieee802_11_elems *elems,
1235 bool beacon)
1236 {
1237 struct ieee80211_local *local = sdata->local;
1238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1239 struct cfg80211_bss *cbss = ifmgd->associated;
1240 struct ieee80211_chanctx_conf *conf;
1241 struct ieee80211_chanctx *chanctx;
1242 enum nl80211_band current_band;
1243 struct ieee80211_csa_ie csa_ie;
1244 struct ieee80211_channel_switch ch_switch;
1245 int res;
1246
1247 sdata_assert_lock(sdata);
1248
1249 if (!cbss)
1250 return;
1251
1252 if (local->scanning)
1253 return;
1254
1255 /* disregard subsequent announcements if we are already processing */
1256 if (sdata->vif.csa_active)
1257 return;
1258
1259 current_band = cbss->channel->band;
1260 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1261 ifmgd->flags,
1262 ifmgd->associated->bssid, &csa_ie);
1263 if (res < 0)
1264 ieee80211_queue_work(&local->hw,
1265 &ifmgd->csa_connection_drop_work);
1266 if (res)
1267 return;
1268
1269 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1270 IEEE80211_CHAN_DISABLED)) {
1271 sdata_info(sdata,
1272 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1273 ifmgd->associated->bssid,
1274 csa_ie.chandef.chan->center_freq,
1275 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1276 csa_ie.chandef.center_freq2);
1277 ieee80211_queue_work(&local->hw,
1278 &ifmgd->csa_connection_drop_work);
1279 return;
1280 }
1281
1282 if (cfg80211_chandef_identical(&csa_ie.chandef,
1283 &sdata->vif.bss_conf.chandef)) {
1284 if (ifmgd->csa_ignored_same_chan)
1285 return;
1286 sdata_info(sdata,
1287 "AP %pM tries to chanswitch to same channel, ignore\n",
1288 ifmgd->associated->bssid);
1289 ifmgd->csa_ignored_same_chan = true;
1290 return;
1291 }
1292
1293 /*
1294 * Drop all TDLS peers - either we disconnect or move to a different
1295 * channel from this point on. There's no telling what our peer will do.
1296 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1297 * have an incompatible wider chandef.
1298 */
1299 ieee80211_teardown_tdls_peers(sdata);
1300
1301 mutex_lock(&local->mtx);
1302 mutex_lock(&local->chanctx_mtx);
1303 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1304 lockdep_is_held(&local->chanctx_mtx));
1305 if (!conf) {
1306 sdata_info(sdata,
1307 "no channel context assigned to vif?, disconnecting\n");
1308 goto drop_connection;
1309 }
1310
1311 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1312
1313 if (local->use_chanctx &&
1314 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1315 sdata_info(sdata,
1316 "driver doesn't support chan-switch with channel contexts\n");
1317 goto drop_connection;
1318 }
1319
1320 ch_switch.timestamp = timestamp;
1321 ch_switch.device_timestamp = device_timestamp;
1322 ch_switch.block_tx = csa_ie.mode;
1323 ch_switch.chandef = csa_ie.chandef;
1324 ch_switch.count = csa_ie.count;
1325
1326 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1327 sdata_info(sdata,
1328 "preparing for channel switch failed, disconnecting\n");
1329 goto drop_connection;
1330 }
1331
1332 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1333 chanctx->mode, false);
1334 if (res) {
1335 sdata_info(sdata,
1336 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1337 res);
1338 goto drop_connection;
1339 }
1340 mutex_unlock(&local->chanctx_mtx);
1341
1342 sdata->vif.csa_active = true;
1343 sdata->csa_chandef = csa_ie.chandef;
1344 sdata->csa_block_tx = csa_ie.mode;
1345 ifmgd->csa_ignored_same_chan = false;
1346
1347 if (sdata->csa_block_tx)
1348 ieee80211_stop_vif_queues(local, sdata,
1349 IEEE80211_QUEUE_STOP_REASON_CSA);
1350 mutex_unlock(&local->mtx);
1351
1352 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1353 csa_ie.count);
1354
1355 if (local->ops->channel_switch) {
1356 /* use driver's channel switch callback */
1357 drv_channel_switch(local, sdata, &ch_switch);
1358 return;
1359 }
1360
1361 /* channel switch handled in software */
1362 if (csa_ie.count <= 1)
1363 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1364 else
1365 mod_timer(&ifmgd->chswitch_timer,
1366 TU_TO_EXP_TIME((csa_ie.count - 1) *
1367 cbss->beacon_interval));
1368 return;
1369 drop_connection:
1370 /*
1371 * This is just so that the disconnect flow will know that
1372 * we were trying to switch channel and failed. In case the
1373 * mode is 1 (we are not allowed to Tx), we will know not to
1374 * send a deauthentication frame. Those two fields will be
1375 * reset when the disconnection worker runs.
1376 */
1377 sdata->vif.csa_active = true;
1378 sdata->csa_block_tx = csa_ie.mode;
1379
1380 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1381 mutex_unlock(&local->chanctx_mtx);
1382 mutex_unlock(&local->mtx);
1383 }
1384
1385 static bool
1386 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1387 struct ieee80211_channel *channel,
1388 const u8 *country_ie, u8 country_ie_len,
1389 const u8 *pwr_constr_elem,
1390 int *chan_pwr, int *pwr_reduction)
1391 {
1392 struct ieee80211_country_ie_triplet *triplet;
1393 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1394 int i, chan_increment;
1395 bool have_chan_pwr = false;
1396
1397 /* Invalid IE */
1398 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1399 return false;
1400
1401 triplet = (void *)(country_ie + 3);
1402 country_ie_len -= 3;
1403
1404 switch (channel->band) {
1405 default:
1406 WARN_ON_ONCE(1);
1407 /* fall through */
1408 case NL80211_BAND_2GHZ:
1409 case NL80211_BAND_60GHZ:
1410 chan_increment = 1;
1411 break;
1412 case NL80211_BAND_5GHZ:
1413 chan_increment = 4;
1414 break;
1415 }
1416
1417 /* find channel */
1418 while (country_ie_len >= 3) {
1419 u8 first_channel = triplet->chans.first_channel;
1420
1421 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1422 goto next;
1423
1424 for (i = 0; i < triplet->chans.num_channels; i++) {
1425 if (first_channel + i * chan_increment == chan) {
1426 have_chan_pwr = true;
1427 *chan_pwr = triplet->chans.max_power;
1428 break;
1429 }
1430 }
1431 if (have_chan_pwr)
1432 break;
1433
1434 next:
1435 triplet++;
1436 country_ie_len -= 3;
1437 }
1438
1439 if (have_chan_pwr && pwr_constr_elem)
1440 *pwr_reduction = *pwr_constr_elem;
1441 else
1442 *pwr_reduction = 0;
1443
1444 return have_chan_pwr;
1445 }
1446
1447 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1448 struct ieee80211_channel *channel,
1449 const u8 *cisco_dtpc_ie,
1450 int *pwr_level)
1451 {
1452 /* From practical testing, the first data byte of the DTPC element
1453 * seems to contain the requested dBm level, and the CLI on Cisco
1454 * APs clearly state the range is -127 to 127 dBm, which indicates
1455 * a signed byte, although it seemingly never actually goes negative.
1456 * The other byte seems to always be zero.
1457 */
1458 *pwr_level = (__s8)cisco_dtpc_ie[4];
1459 }
1460
1461 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1462 struct ieee80211_channel *channel,
1463 struct ieee80211_mgmt *mgmt,
1464 const u8 *country_ie, u8 country_ie_len,
1465 const u8 *pwr_constr_ie,
1466 const u8 *cisco_dtpc_ie)
1467 {
1468 bool has_80211h_pwr = false, has_cisco_pwr = false;
1469 int chan_pwr = 0, pwr_reduction_80211h = 0;
1470 int pwr_level_cisco, pwr_level_80211h;
1471 int new_ap_level;
1472 __le16 capab = mgmt->u.probe_resp.capab_info;
1473
1474 if (country_ie &&
1475 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1476 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1477 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1478 sdata, channel, country_ie, country_ie_len,
1479 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1480 pwr_level_80211h =
1481 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1482 }
1483
1484 if (cisco_dtpc_ie) {
1485 ieee80211_find_cisco_dtpc(
1486 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1487 has_cisco_pwr = true;
1488 }
1489
1490 if (!has_80211h_pwr && !has_cisco_pwr)
1491 return 0;
1492
1493 /* If we have both 802.11h and Cisco DTPC, apply both limits
1494 * by picking the smallest of the two power levels advertised.
1495 */
1496 if (has_80211h_pwr &&
1497 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1498 new_ap_level = pwr_level_80211h;
1499
1500 if (sdata->ap_power_level == new_ap_level)
1501 return 0;
1502
1503 sdata_dbg(sdata,
1504 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1505 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1506 sdata->u.mgd.bssid);
1507 } else { /* has_cisco_pwr is always true here. */
1508 new_ap_level = pwr_level_cisco;
1509
1510 if (sdata->ap_power_level == new_ap_level)
1511 return 0;
1512
1513 sdata_dbg(sdata,
1514 "Limiting TX power to %d dBm as advertised by %pM\n",
1515 pwr_level_cisco, sdata->u.mgd.bssid);
1516 }
1517
1518 sdata->ap_power_level = new_ap_level;
1519 if (__ieee80211_recalc_txpower(sdata))
1520 return BSS_CHANGED_TXPOWER;
1521 return 0;
1522 }
1523
1524 /* powersave */
1525 static void ieee80211_enable_ps(struct ieee80211_local *local,
1526 struct ieee80211_sub_if_data *sdata)
1527 {
1528 struct ieee80211_conf *conf = &local->hw.conf;
1529
1530 /*
1531 * If we are scanning right now then the parameters will
1532 * take effect when scan finishes.
1533 */
1534 if (local->scanning)
1535 return;
1536
1537 if (conf->dynamic_ps_timeout > 0 &&
1538 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1539 mod_timer(&local->dynamic_ps_timer, jiffies +
1540 msecs_to_jiffies(conf->dynamic_ps_timeout));
1541 } else {
1542 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1543 ieee80211_send_nullfunc(local, sdata, true);
1544
1545 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1546 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1547 return;
1548
1549 conf->flags |= IEEE80211_CONF_PS;
1550 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1551 }
1552 }
1553
1554 static void ieee80211_change_ps(struct ieee80211_local *local)
1555 {
1556 struct ieee80211_conf *conf = &local->hw.conf;
1557
1558 if (local->ps_sdata) {
1559 ieee80211_enable_ps(local, local->ps_sdata);
1560 } else if (conf->flags & IEEE80211_CONF_PS) {
1561 conf->flags &= ~IEEE80211_CONF_PS;
1562 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1563 del_timer_sync(&local->dynamic_ps_timer);
1564 cancel_work_sync(&local->dynamic_ps_enable_work);
1565 }
1566 }
1567
1568 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1569 {
1570 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1571 struct sta_info *sta = NULL;
1572 bool authorized = false;
1573
1574 if (!mgd->powersave)
1575 return false;
1576
1577 if (mgd->broken_ap)
1578 return false;
1579
1580 if (!mgd->associated)
1581 return false;
1582
1583 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1584 return false;
1585
1586 if (!mgd->have_beacon)
1587 return false;
1588
1589 rcu_read_lock();
1590 sta = sta_info_get(sdata, mgd->bssid);
1591 if (sta)
1592 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1593 rcu_read_unlock();
1594
1595 return authorized;
1596 }
1597
1598 /* need to hold RTNL or interface lock */
1599 void ieee80211_recalc_ps(struct ieee80211_local *local)
1600 {
1601 struct ieee80211_sub_if_data *sdata, *found = NULL;
1602 int count = 0;
1603 int timeout;
1604
1605 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1606 local->ps_sdata = NULL;
1607 return;
1608 }
1609
1610 list_for_each_entry(sdata, &local->interfaces, list) {
1611 if (!ieee80211_sdata_running(sdata))
1612 continue;
1613 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1614 /* If an AP vif is found, then disable PS
1615 * by setting the count to zero thereby setting
1616 * ps_sdata to NULL.
1617 */
1618 count = 0;
1619 break;
1620 }
1621 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1622 continue;
1623 found = sdata;
1624 count++;
1625 }
1626
1627 if (count == 1 && ieee80211_powersave_allowed(found)) {
1628 u8 dtimper = found->u.mgd.dtim_period;
1629
1630 timeout = local->dynamic_ps_forced_timeout;
1631 if (timeout < 0)
1632 timeout = 100;
1633 local->hw.conf.dynamic_ps_timeout = timeout;
1634
1635 /* If the TIM IE is invalid, pretend the value is 1 */
1636 if (!dtimper)
1637 dtimper = 1;
1638
1639 local->hw.conf.ps_dtim_period = dtimper;
1640 local->ps_sdata = found;
1641 } else {
1642 local->ps_sdata = NULL;
1643 }
1644
1645 ieee80211_change_ps(local);
1646 }
1647
1648 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1649 {
1650 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1651
1652 if (sdata->vif.bss_conf.ps != ps_allowed) {
1653 sdata->vif.bss_conf.ps = ps_allowed;
1654 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1655 }
1656 }
1657
1658 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1659 {
1660 struct ieee80211_local *local =
1661 container_of(work, struct ieee80211_local,
1662 dynamic_ps_disable_work);
1663
1664 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1665 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1667 }
1668
1669 ieee80211_wake_queues_by_reason(&local->hw,
1670 IEEE80211_MAX_QUEUE_MAP,
1671 IEEE80211_QUEUE_STOP_REASON_PS,
1672 false);
1673 }
1674
1675 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1676 {
1677 struct ieee80211_local *local =
1678 container_of(work, struct ieee80211_local,
1679 dynamic_ps_enable_work);
1680 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1681 struct ieee80211_if_managed *ifmgd;
1682 unsigned long flags;
1683 int q;
1684
1685 /* can only happen when PS was just disabled anyway */
1686 if (!sdata)
1687 return;
1688
1689 ifmgd = &sdata->u.mgd;
1690
1691 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1692 return;
1693
1694 if (local->hw.conf.dynamic_ps_timeout > 0) {
1695 /* don't enter PS if TX frames are pending */
1696 if (drv_tx_frames_pending(local)) {
1697 mod_timer(&local->dynamic_ps_timer, jiffies +
1698 msecs_to_jiffies(
1699 local->hw.conf.dynamic_ps_timeout));
1700 return;
1701 }
1702
1703 /*
1704 * transmission can be stopped by others which leads to
1705 * dynamic_ps_timer expiry. Postpone the ps timer if it
1706 * is not the actual idle state.
1707 */
1708 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1709 for (q = 0; q < local->hw.queues; q++) {
1710 if (local->queue_stop_reasons[q]) {
1711 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1712 flags);
1713 mod_timer(&local->dynamic_ps_timer, jiffies +
1714 msecs_to_jiffies(
1715 local->hw.conf.dynamic_ps_timeout));
1716 return;
1717 }
1718 }
1719 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1720 }
1721
1722 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1723 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1724 if (drv_tx_frames_pending(local)) {
1725 mod_timer(&local->dynamic_ps_timer, jiffies +
1726 msecs_to_jiffies(
1727 local->hw.conf.dynamic_ps_timeout));
1728 } else {
1729 ieee80211_send_nullfunc(local, sdata, true);
1730 /* Flush to get the tx status of nullfunc frame */
1731 ieee80211_flush_queues(local, sdata, false);
1732 }
1733 }
1734
1735 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1736 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1737 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1738 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1739 local->hw.conf.flags |= IEEE80211_CONF_PS;
1740 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1741 }
1742 }
1743
1744 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1745 {
1746 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1747
1748 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1749 }
1750
1751 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1752 {
1753 struct delayed_work *delayed_work = to_delayed_work(work);
1754 struct ieee80211_sub_if_data *sdata =
1755 container_of(delayed_work, struct ieee80211_sub_if_data,
1756 dfs_cac_timer_work);
1757 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1758
1759 mutex_lock(&sdata->local->mtx);
1760 if (sdata->wdev.cac_started) {
1761 ieee80211_vif_release_channel(sdata);
1762 cfg80211_cac_event(sdata->dev, &chandef,
1763 NL80211_RADAR_CAC_FINISHED,
1764 GFP_KERNEL);
1765 }
1766 mutex_unlock(&sdata->local->mtx);
1767 }
1768
1769 static bool
1770 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1771 {
1772 struct ieee80211_local *local = sdata->local;
1773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1774 bool ret = false;
1775 int ac;
1776
1777 if (local->hw.queues < IEEE80211_NUM_ACS)
1778 return false;
1779
1780 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1781 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1782 int non_acm_ac;
1783 unsigned long now = jiffies;
1784
1785 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1786 tx_tspec->admitted_time &&
1787 time_after(now, tx_tspec->time_slice_start + HZ)) {
1788 tx_tspec->consumed_tx_time = 0;
1789 tx_tspec->time_slice_start = now;
1790
1791 if (tx_tspec->downgraded)
1792 tx_tspec->action =
1793 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1794 }
1795
1796 switch (tx_tspec->action) {
1797 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1798 /* take the original parameters */
1799 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1800 sdata_err(sdata,
1801 "failed to set TX queue parameters for queue %d\n",
1802 ac);
1803 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1804 tx_tspec->downgraded = false;
1805 ret = true;
1806 break;
1807 case TX_TSPEC_ACTION_DOWNGRADE:
1808 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1809 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1810 ret = true;
1811 break;
1812 }
1813 /* downgrade next lower non-ACM AC */
1814 for (non_acm_ac = ac + 1;
1815 non_acm_ac < IEEE80211_NUM_ACS;
1816 non_acm_ac++)
1817 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1818 break;
1819 /* Usually the loop will result in using BK even if it
1820 * requires admission control, but such a configuration
1821 * makes no sense and we have to transmit somehow - the
1822 * AC selection does the same thing.
1823 * If we started out trying to downgrade from BK, then
1824 * the extra condition here might be needed.
1825 */
1826 if (non_acm_ac >= IEEE80211_NUM_ACS)
1827 non_acm_ac = IEEE80211_AC_BK;
1828 if (drv_conf_tx(local, sdata, ac,
1829 &sdata->tx_conf[non_acm_ac]))
1830 sdata_err(sdata,
1831 "failed to set TX queue parameters for queue %d\n",
1832 ac);
1833 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1834 ret = true;
1835 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1836 tx_tspec->time_slice_start + HZ - now + 1);
1837 break;
1838 case TX_TSPEC_ACTION_NONE:
1839 /* nothing now */
1840 break;
1841 }
1842 }
1843
1844 return ret;
1845 }
1846
1847 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1848 {
1849 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1850 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1851 }
1852
1853 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1854 {
1855 struct ieee80211_sub_if_data *sdata;
1856
1857 sdata = container_of(work, struct ieee80211_sub_if_data,
1858 u.mgd.tx_tspec_wk.work);
1859 ieee80211_sta_handle_tspec_ac_params(sdata);
1860 }
1861
1862 /* MLME */
1863 static bool
1864 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1865 struct ieee80211_sub_if_data *sdata,
1866 const u8 *wmm_param, size_t wmm_param_len,
1867 const struct ieee80211_mu_edca_param_set *mu_edca)
1868 {
1869 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1871 size_t left;
1872 int count, ac;
1873 const u8 *pos;
1874 u8 uapsd_queues = 0;
1875
1876 if (!local->ops->conf_tx)
1877 return false;
1878
1879 if (local->hw.queues < IEEE80211_NUM_ACS)
1880 return false;
1881
1882 if (!wmm_param)
1883 return false;
1884
1885 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1886 return false;
1887
1888 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1889 uapsd_queues = ifmgd->uapsd_queues;
1890
1891 count = wmm_param[6] & 0x0f;
1892 if (count == ifmgd->wmm_last_param_set)
1893 return false;
1894 ifmgd->wmm_last_param_set = count;
1895
1896 pos = wmm_param + 8;
1897 left = wmm_param_len - 8;
1898
1899 memset(&params, 0, sizeof(params));
1900
1901 sdata->wmm_acm = 0;
1902 for (; left >= 4; left -= 4, pos += 4) {
1903 int aci = (pos[0] >> 5) & 0x03;
1904 int acm = (pos[0] >> 4) & 0x01;
1905 bool uapsd = false;
1906
1907 switch (aci) {
1908 case 1: /* AC_BK */
1909 ac = IEEE80211_AC_BK;
1910 if (acm)
1911 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1913 uapsd = true;
1914 params[ac].mu_edca = !!mu_edca;
1915 if (mu_edca)
1916 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1917 break;
1918 case 2: /* AC_VI */
1919 ac = IEEE80211_AC_VI;
1920 if (acm)
1921 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1922 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1923 uapsd = true;
1924 params[ac].mu_edca = !!mu_edca;
1925 if (mu_edca)
1926 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1927 break;
1928 case 3: /* AC_VO */
1929 ac = IEEE80211_AC_VO;
1930 if (acm)
1931 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1932 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1933 uapsd = true;
1934 params[ac].mu_edca = !!mu_edca;
1935 if (mu_edca)
1936 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
1937 break;
1938 case 0: /* AC_BE */
1939 default:
1940 ac = IEEE80211_AC_BE;
1941 if (acm)
1942 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1943 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1944 uapsd = true;
1945 params[ac].mu_edca = !!mu_edca;
1946 if (mu_edca)
1947 params[ac].mu_edca_param_rec = mu_edca->ac_be;
1948 break;
1949 }
1950
1951 params[ac].aifs = pos[0] & 0x0f;
1952
1953 if (params[ac].aifs < 2) {
1954 sdata_info(sdata,
1955 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1956 params[ac].aifs, aci);
1957 params[ac].aifs = 2;
1958 }
1959 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1960 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1961 params[ac].txop = get_unaligned_le16(pos + 2);
1962 params[ac].acm = acm;
1963 params[ac].uapsd = uapsd;
1964
1965 if (params[ac].cw_min == 0 ||
1966 params[ac].cw_min > params[ac].cw_max) {
1967 sdata_info(sdata,
1968 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1969 params[ac].cw_min, params[ac].cw_max, aci);
1970 return false;
1971 }
1972 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
1973 }
1974
1975 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1976 mlme_dbg(sdata,
1977 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1978 ac, params[ac].acm,
1979 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1980 params[ac].txop, params[ac].uapsd,
1981 ifmgd->tx_tspec[ac].downgraded);
1982 sdata->tx_conf[ac] = params[ac];
1983 if (!ifmgd->tx_tspec[ac].downgraded &&
1984 drv_conf_tx(local, sdata, ac, &params[ac]))
1985 sdata_err(sdata,
1986 "failed to set TX queue parameters for AC %d\n",
1987 ac);
1988 }
1989
1990 /* enable WMM or activate new settings */
1991 sdata->vif.bss_conf.qos = true;
1992 return true;
1993 }
1994
1995 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1996 {
1997 lockdep_assert_held(&sdata->local->mtx);
1998
1999 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2000 ieee80211_run_deferred_scan(sdata->local);
2001 }
2002
2003 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2004 {
2005 mutex_lock(&sdata->local->mtx);
2006 __ieee80211_stop_poll(sdata);
2007 mutex_unlock(&sdata->local->mtx);
2008 }
2009
2010 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2011 u16 capab, bool erp_valid, u8 erp)
2012 {
2013 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2014 struct ieee80211_supported_band *sband;
2015 u32 changed = 0;
2016 bool use_protection;
2017 bool use_short_preamble;
2018 bool use_short_slot;
2019
2020 sband = ieee80211_get_sband(sdata);
2021 if (!sband)
2022 return changed;
2023
2024 if (erp_valid) {
2025 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2026 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2027 } else {
2028 use_protection = false;
2029 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2030 }
2031
2032 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2033 if (sband->band == NL80211_BAND_5GHZ)
2034 use_short_slot = true;
2035
2036 if (use_protection != bss_conf->use_cts_prot) {
2037 bss_conf->use_cts_prot = use_protection;
2038 changed |= BSS_CHANGED_ERP_CTS_PROT;
2039 }
2040
2041 if (use_short_preamble != bss_conf->use_short_preamble) {
2042 bss_conf->use_short_preamble = use_short_preamble;
2043 changed |= BSS_CHANGED_ERP_PREAMBLE;
2044 }
2045
2046 if (use_short_slot != bss_conf->use_short_slot) {
2047 bss_conf->use_short_slot = use_short_slot;
2048 changed |= BSS_CHANGED_ERP_SLOT;
2049 }
2050
2051 return changed;
2052 }
2053
2054 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2055 struct cfg80211_bss *cbss,
2056 u32 bss_info_changed)
2057 {
2058 struct ieee80211_bss *bss = (void *)cbss->priv;
2059 struct ieee80211_local *local = sdata->local;
2060 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2061
2062 bss_info_changed |= BSS_CHANGED_ASSOC;
2063 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2064 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2065
2066 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2067 beacon_loss_count * bss_conf->beacon_int));
2068
2069 sdata->u.mgd.associated = cbss;
2070 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2071
2072 ieee80211_check_rate_mask(sdata);
2073
2074 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2075
2076 if (sdata->vif.p2p ||
2077 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2078 const struct cfg80211_bss_ies *ies;
2079
2080 rcu_read_lock();
2081 ies = rcu_dereference(cbss->ies);
2082 if (ies) {
2083 int ret;
2084
2085 ret = cfg80211_get_p2p_attr(
2086 ies->data, ies->len,
2087 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2088 (u8 *) &bss_conf->p2p_noa_attr,
2089 sizeof(bss_conf->p2p_noa_attr));
2090 if (ret >= 2) {
2091 sdata->u.mgd.p2p_noa_index =
2092 bss_conf->p2p_noa_attr.index;
2093 bss_info_changed |= BSS_CHANGED_P2P_PS;
2094 }
2095 }
2096 rcu_read_unlock();
2097 }
2098
2099 /* just to be sure */
2100 ieee80211_stop_poll(sdata);
2101
2102 ieee80211_led_assoc(local, 1);
2103
2104 if (sdata->u.mgd.have_beacon) {
2105 /*
2106 * If the AP is buggy we may get here with no DTIM period
2107 * known, so assume it's 1 which is the only safe assumption
2108 * in that case, although if the TIM IE is broken powersave
2109 * probably just won't work at all.
2110 */
2111 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2112 bss_conf->beacon_rate = bss->beacon_rate;
2113 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2114 } else {
2115 bss_conf->beacon_rate = NULL;
2116 bss_conf->dtim_period = 0;
2117 }
2118
2119 bss_conf->assoc = 1;
2120
2121 /* Tell the driver to monitor connection quality (if supported) */
2122 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2123 bss_conf->cqm_rssi_thold)
2124 bss_info_changed |= BSS_CHANGED_CQM;
2125
2126 /* Enable ARP filtering */
2127 if (bss_conf->arp_addr_cnt)
2128 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2129
2130 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2131
2132 mutex_lock(&local->iflist_mtx);
2133 ieee80211_recalc_ps(local);
2134 mutex_unlock(&local->iflist_mtx);
2135
2136 ieee80211_recalc_smps(sdata);
2137 ieee80211_recalc_ps_vif(sdata);
2138
2139 netif_carrier_on(sdata->dev);
2140 }
2141
2142 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2143 u16 stype, u16 reason, bool tx,
2144 u8 *frame_buf)
2145 {
2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2147 struct ieee80211_local *local = sdata->local;
2148 u32 changed = 0;
2149
2150 sdata_assert_lock(sdata);
2151
2152 if (WARN_ON_ONCE(tx && !frame_buf))
2153 return;
2154
2155 if (WARN_ON(!ifmgd->associated))
2156 return;
2157
2158 ieee80211_stop_poll(sdata);
2159
2160 ifmgd->associated = NULL;
2161 netif_carrier_off(sdata->dev);
2162
2163 /*
2164 * if we want to get out of ps before disassoc (why?) we have
2165 * to do it before sending disassoc, as otherwise the null-packet
2166 * won't be valid.
2167 */
2168 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2169 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2170 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2171 }
2172 local->ps_sdata = NULL;
2173
2174 /* disable per-vif ps */
2175 ieee80211_recalc_ps_vif(sdata);
2176
2177 /* make sure ongoing transmission finishes */
2178 synchronize_net();
2179
2180 /*
2181 * drop any frame before deauth/disassoc, this can be data or
2182 * management frame. Since we are disconnecting, we should not
2183 * insist sending these frames which can take time and delay
2184 * the disconnection and possible the roaming.
2185 */
2186 if (tx)
2187 ieee80211_flush_queues(local, sdata, true);
2188
2189 /* deauthenticate/disassociate now */
2190 if (tx || frame_buf) {
2191 /*
2192 * In multi channel scenarios guarantee that the virtual
2193 * interface is granted immediate airtime to transmit the
2194 * deauthentication frame by calling mgd_prepare_tx, if the
2195 * driver requested so.
2196 */
2197 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2198 !ifmgd->have_beacon)
2199 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2200
2201 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2202 reason, tx, frame_buf);
2203 }
2204
2205 /* flush out frame - make sure the deauth was actually sent */
2206 if (tx)
2207 ieee80211_flush_queues(local, sdata, false);
2208
2209 /* clear bssid only after building the needed mgmt frames */
2210 eth_zero_addr(ifmgd->bssid);
2211
2212 /* remove AP and TDLS peers */
2213 sta_info_flush(sdata);
2214
2215 /* finally reset all BSS / config parameters */
2216 changed |= ieee80211_reset_erp_info(sdata);
2217
2218 ieee80211_led_assoc(local, 0);
2219 changed |= BSS_CHANGED_ASSOC;
2220 sdata->vif.bss_conf.assoc = false;
2221
2222 ifmgd->p2p_noa_index = -1;
2223 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2224 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2225
2226 /* on the next assoc, re-program HT/VHT parameters */
2227 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2228 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2229 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2230 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2231
2232 /* reset MU-MIMO ownership and group data */
2233 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2234 sizeof(sdata->vif.bss_conf.mu_group.membership));
2235 memset(sdata->vif.bss_conf.mu_group.position, 0,
2236 sizeof(sdata->vif.bss_conf.mu_group.position));
2237 changed |= BSS_CHANGED_MU_GROUPS;
2238 sdata->vif.mu_mimo_owner = false;
2239
2240 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2241
2242 del_timer_sync(&local->dynamic_ps_timer);
2243 cancel_work_sync(&local->dynamic_ps_enable_work);
2244
2245 /* Disable ARP filtering */
2246 if (sdata->vif.bss_conf.arp_addr_cnt)
2247 changed |= BSS_CHANGED_ARP_FILTER;
2248
2249 sdata->vif.bss_conf.qos = false;
2250 changed |= BSS_CHANGED_QOS;
2251
2252 /* The BSSID (not really interesting) and HT changed */
2253 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2254 ieee80211_bss_info_change_notify(sdata, changed);
2255
2256 /* disassociated - set to defaults now */
2257 ieee80211_set_wmm_default(sdata, false, false);
2258
2259 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2260 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2261 del_timer_sync(&sdata->u.mgd.timer);
2262 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2263
2264 sdata->vif.bss_conf.dtim_period = 0;
2265 sdata->vif.bss_conf.beacon_rate = NULL;
2266
2267 ifmgd->have_beacon = false;
2268
2269 ifmgd->flags = 0;
2270 mutex_lock(&local->mtx);
2271 ieee80211_vif_release_channel(sdata);
2272
2273 sdata->vif.csa_active = false;
2274 ifmgd->csa_waiting_bcn = false;
2275 ifmgd->csa_ignored_same_chan = false;
2276 if (sdata->csa_block_tx) {
2277 ieee80211_wake_vif_queues(local, sdata,
2278 IEEE80211_QUEUE_STOP_REASON_CSA);
2279 sdata->csa_block_tx = false;
2280 }
2281 mutex_unlock(&local->mtx);
2282
2283 /* existing TX TSPEC sessions no longer exist */
2284 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2285 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2286
2287 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2288 }
2289
2290 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2291 struct ieee80211_hdr *hdr)
2292 {
2293 /*
2294 * We can postpone the mgd.timer whenever receiving unicast frames
2295 * from AP because we know that the connection is working both ways
2296 * at that time. But multicast frames (and hence also beacons) must
2297 * be ignored here, because we need to trigger the timer during
2298 * data idle periods for sending the periodic probe request to the
2299 * AP we're connected to.
2300 */
2301 if (is_multicast_ether_addr(hdr->addr1))
2302 return;
2303
2304 ieee80211_sta_reset_conn_monitor(sdata);
2305 }
2306
2307 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2308 {
2309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2310 struct ieee80211_local *local = sdata->local;
2311
2312 mutex_lock(&local->mtx);
2313 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2314 goto out;
2315
2316 __ieee80211_stop_poll(sdata);
2317
2318 mutex_lock(&local->iflist_mtx);
2319 ieee80211_recalc_ps(local);
2320 mutex_unlock(&local->iflist_mtx);
2321
2322 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2323 goto out;
2324
2325 /*
2326 * We've received a probe response, but are not sure whether
2327 * we have or will be receiving any beacons or data, so let's
2328 * schedule the timers again, just in case.
2329 */
2330 ieee80211_sta_reset_beacon_monitor(sdata);
2331
2332 mod_timer(&ifmgd->conn_mon_timer,
2333 round_jiffies_up(jiffies +
2334 IEEE80211_CONNECTION_IDLE_TIME));
2335 out:
2336 mutex_unlock(&local->mtx);
2337 }
2338
2339 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2340 struct ieee80211_hdr *hdr,
2341 u16 tx_time)
2342 {
2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344 u16 tid = ieee80211_get_tid(hdr);
2345 int ac = ieee80211_ac_from_tid(tid);
2346 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2347 unsigned long now = jiffies;
2348
2349 if (likely(!tx_tspec->admitted_time))
2350 return;
2351
2352 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2353 tx_tspec->consumed_tx_time = 0;
2354 tx_tspec->time_slice_start = now;
2355
2356 if (tx_tspec->downgraded) {
2357 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2358 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2359 }
2360 }
2361
2362 if (tx_tspec->downgraded)
2363 return;
2364
2365 tx_tspec->consumed_tx_time += tx_time;
2366
2367 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2368 tx_tspec->downgraded = true;
2369 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2370 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2371 }
2372 }
2373
2374 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2375 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2376 {
2377 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2378
2379 if (!ieee80211_is_data(hdr->frame_control))
2380 return;
2381
2382 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2383 sdata->u.mgd.probe_send_count > 0) {
2384 if (ack)
2385 ieee80211_sta_reset_conn_monitor(sdata);
2386 else
2387 sdata->u.mgd.nullfunc_failed = true;
2388 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2389 return;
2390 }
2391
2392 if (ack)
2393 ieee80211_sta_reset_conn_monitor(sdata);
2394 }
2395
2396 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2397 const u8 *src, const u8 *dst,
2398 const u8 *ssid, size_t ssid_len,
2399 struct ieee80211_channel *channel)
2400 {
2401 struct sk_buff *skb;
2402
2403 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2404 ssid, ssid_len, NULL, 0,
2405 IEEE80211_PROBE_FLAG_DIRECTED);
2406 if (skb)
2407 ieee80211_tx_skb(sdata, skb);
2408 }
2409
2410 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2411 {
2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413 const u8 *ssid;
2414 u8 *dst = ifmgd->associated->bssid;
2415 u8 unicast_limit = max(1, max_probe_tries - 3);
2416 struct sta_info *sta;
2417
2418 /*
2419 * Try sending broadcast probe requests for the last three
2420 * probe requests after the first ones failed since some
2421 * buggy APs only support broadcast probe requests.
2422 */
2423 if (ifmgd->probe_send_count >= unicast_limit)
2424 dst = NULL;
2425
2426 /*
2427 * When the hardware reports an accurate Tx ACK status, it's
2428 * better to send a nullfunc frame instead of a probe request,
2429 * as it will kick us off the AP quickly if we aren't associated
2430 * anymore. The timeout will be reset if the frame is ACKed by
2431 * the AP.
2432 */
2433 ifmgd->probe_send_count++;
2434
2435 if (dst) {
2436 mutex_lock(&sdata->local->sta_mtx);
2437 sta = sta_info_get(sdata, dst);
2438 if (!WARN_ON(!sta))
2439 ieee80211_check_fast_rx(sta);
2440 mutex_unlock(&sdata->local->sta_mtx);
2441 }
2442
2443 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2444 ifmgd->nullfunc_failed = false;
2445 ieee80211_send_nullfunc(sdata->local, sdata, false);
2446 } else {
2447 int ssid_len;
2448
2449 rcu_read_lock();
2450 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2451 if (WARN_ON_ONCE(ssid == NULL))
2452 ssid_len = 0;
2453 else
2454 ssid_len = ssid[1];
2455
2456 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2457 ssid + 2, ssid_len,
2458 ifmgd->associated->channel);
2459 rcu_read_unlock();
2460 }
2461
2462 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2463 run_again(sdata, ifmgd->probe_timeout);
2464 }
2465
2466 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2467 bool beacon)
2468 {
2469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2470 bool already = false;
2471
2472 if (!ieee80211_sdata_running(sdata))
2473 return;
2474
2475 sdata_lock(sdata);
2476
2477 if (!ifmgd->associated)
2478 goto out;
2479
2480 mutex_lock(&sdata->local->mtx);
2481
2482 if (sdata->local->tmp_channel || sdata->local->scanning) {
2483 mutex_unlock(&sdata->local->mtx);
2484 goto out;
2485 }
2486
2487 if (beacon) {
2488 mlme_dbg_ratelimited(sdata,
2489 "detected beacon loss from AP (missed %d beacons) - probing\n",
2490 beacon_loss_count);
2491
2492 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2493 }
2494
2495 /*
2496 * The driver/our work has already reported this event or the
2497 * connection monitoring has kicked in and we have already sent
2498 * a probe request. Or maybe the AP died and the driver keeps
2499 * reporting until we disassociate...
2500 *
2501 * In either case we have to ignore the current call to this
2502 * function (except for setting the correct probe reason bit)
2503 * because otherwise we would reset the timer every time and
2504 * never check whether we received a probe response!
2505 */
2506 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2507 already = true;
2508
2509 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2510
2511 mutex_unlock(&sdata->local->mtx);
2512
2513 if (already)
2514 goto out;
2515
2516 mutex_lock(&sdata->local->iflist_mtx);
2517 ieee80211_recalc_ps(sdata->local);
2518 mutex_unlock(&sdata->local->iflist_mtx);
2519
2520 ifmgd->probe_send_count = 0;
2521 ieee80211_mgd_probe_ap_send(sdata);
2522 out:
2523 sdata_unlock(sdata);
2524 }
2525
2526 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2527 struct ieee80211_vif *vif)
2528 {
2529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2531 struct cfg80211_bss *cbss;
2532 struct sk_buff *skb;
2533 const u8 *ssid;
2534 int ssid_len;
2535
2536 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2537 return NULL;
2538
2539 sdata_assert_lock(sdata);
2540
2541 if (ifmgd->associated)
2542 cbss = ifmgd->associated;
2543 else if (ifmgd->auth_data)
2544 cbss = ifmgd->auth_data->bss;
2545 else if (ifmgd->assoc_data)
2546 cbss = ifmgd->assoc_data->bss;
2547 else
2548 return NULL;
2549
2550 rcu_read_lock();
2551 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2552 if (WARN_ON_ONCE(ssid == NULL))
2553 ssid_len = 0;
2554 else
2555 ssid_len = ssid[1];
2556
2557 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2558 (u32) -1, cbss->channel,
2559 ssid + 2, ssid_len,
2560 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2561 rcu_read_unlock();
2562
2563 return skb;
2564 }
2565 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2566
2567 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2568 const u8 *buf, size_t len, bool tx,
2569 u16 reason)
2570 {
2571 struct ieee80211_event event = {
2572 .type = MLME_EVENT,
2573 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2574 .u.mlme.reason = reason,
2575 };
2576
2577 if (tx)
2578 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2579 else
2580 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2581
2582 drv_event_callback(sdata->local, sdata, &event);
2583 }
2584
2585 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2586 {
2587 struct ieee80211_local *local = sdata->local;
2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2589 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2590 bool tx;
2591
2592 sdata_lock(sdata);
2593 if (!ifmgd->associated) {
2594 sdata_unlock(sdata);
2595 return;
2596 }
2597
2598 tx = !sdata->csa_block_tx;
2599
2600 /* AP is probably out of range (or not reachable for another reason) so
2601 * remove the bss struct for that AP.
2602 */
2603 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2604
2605 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2606 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2607 tx, frame_buf);
2608 mutex_lock(&local->mtx);
2609 sdata->vif.csa_active = false;
2610 ifmgd->csa_waiting_bcn = false;
2611 if (sdata->csa_block_tx) {
2612 ieee80211_wake_vif_queues(local, sdata,
2613 IEEE80211_QUEUE_STOP_REASON_CSA);
2614 sdata->csa_block_tx = false;
2615 }
2616 mutex_unlock(&local->mtx);
2617
2618 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2619 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2620
2621 sdata_unlock(sdata);
2622 }
2623
2624 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2625 {
2626 struct ieee80211_sub_if_data *sdata =
2627 container_of(work, struct ieee80211_sub_if_data,
2628 u.mgd.beacon_connection_loss_work);
2629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2630
2631 if (ifmgd->associated)
2632 ifmgd->beacon_loss_count++;
2633
2634 if (ifmgd->connection_loss) {
2635 sdata_info(sdata, "Connection to AP %pM lost\n",
2636 ifmgd->bssid);
2637 __ieee80211_disconnect(sdata);
2638 } else {
2639 ieee80211_mgd_probe_ap(sdata, true);
2640 }
2641 }
2642
2643 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2644 {
2645 struct ieee80211_sub_if_data *sdata =
2646 container_of(work, struct ieee80211_sub_if_data,
2647 u.mgd.csa_connection_drop_work);
2648
2649 __ieee80211_disconnect(sdata);
2650 }
2651
2652 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2653 {
2654 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2655 struct ieee80211_hw *hw = &sdata->local->hw;
2656
2657 trace_api_beacon_loss(sdata);
2658
2659 sdata->u.mgd.connection_loss = false;
2660 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2661 }
2662 EXPORT_SYMBOL(ieee80211_beacon_loss);
2663
2664 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2665 {
2666 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2667 struct ieee80211_hw *hw = &sdata->local->hw;
2668
2669 trace_api_connection_loss(sdata);
2670
2671 sdata->u.mgd.connection_loss = true;
2672 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2673 }
2674 EXPORT_SYMBOL(ieee80211_connection_loss);
2675
2676
2677 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2678 bool assoc)
2679 {
2680 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2681
2682 sdata_assert_lock(sdata);
2683
2684 if (!assoc) {
2685 /*
2686 * we are not authenticated yet, the only timer that could be
2687 * running is the timeout for the authentication response which
2688 * which is not relevant anymore.
2689 */
2690 del_timer_sync(&sdata->u.mgd.timer);
2691 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2692
2693 eth_zero_addr(sdata->u.mgd.bssid);
2694 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2695 sdata->u.mgd.flags = 0;
2696 mutex_lock(&sdata->local->mtx);
2697 ieee80211_vif_release_channel(sdata);
2698 mutex_unlock(&sdata->local->mtx);
2699 }
2700
2701 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2702 kfree(auth_data);
2703 sdata->u.mgd.auth_data = NULL;
2704 }
2705
2706 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2707 bool assoc, bool abandon)
2708 {
2709 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2710
2711 sdata_assert_lock(sdata);
2712
2713 if (!assoc) {
2714 /*
2715 * we are not associated yet, the only timer that could be
2716 * running is the timeout for the association response which
2717 * which is not relevant anymore.
2718 */
2719 del_timer_sync(&sdata->u.mgd.timer);
2720 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2721
2722 eth_zero_addr(sdata->u.mgd.bssid);
2723 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2724 sdata->u.mgd.flags = 0;
2725 sdata->vif.mu_mimo_owner = false;
2726
2727 mutex_lock(&sdata->local->mtx);
2728 ieee80211_vif_release_channel(sdata);
2729 mutex_unlock(&sdata->local->mtx);
2730
2731 if (abandon)
2732 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2733 }
2734
2735 kfree(assoc_data);
2736 sdata->u.mgd.assoc_data = NULL;
2737 }
2738
2739 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2740 struct ieee80211_mgmt *mgmt, size_t len)
2741 {
2742 struct ieee80211_local *local = sdata->local;
2743 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2744 u8 *pos;
2745 struct ieee802_11_elems elems;
2746 u32 tx_flags = 0;
2747
2748 pos = mgmt->u.auth.variable;
2749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2750 if (!elems.challenge)
2751 return;
2752 auth_data->expected_transaction = 4;
2753 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2756 IEEE80211_TX_INTFL_MLME_CONN_TX;
2757 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2758 elems.challenge - 2, elems.challenge_len + 2,
2759 auth_data->bss->bssid, auth_data->bss->bssid,
2760 auth_data->key, auth_data->key_len,
2761 auth_data->key_idx, tx_flags);
2762 }
2763
2764 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2765 const u8 *bssid)
2766 {
2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2768 struct sta_info *sta;
2769 bool result = true;
2770
2771 sdata_info(sdata, "authenticated\n");
2772 ifmgd->auth_data->done = true;
2773 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2774 ifmgd->auth_data->timeout_started = true;
2775 run_again(sdata, ifmgd->auth_data->timeout);
2776
2777 /* move station state to auth */
2778 mutex_lock(&sdata->local->sta_mtx);
2779 sta = sta_info_get(sdata, bssid);
2780 if (!sta) {
2781 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2782 result = false;
2783 goto out;
2784 }
2785 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2786 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2787 result = false;
2788 goto out;
2789 }
2790
2791 out:
2792 mutex_unlock(&sdata->local->sta_mtx);
2793 return result;
2794 }
2795
2796 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2797 struct ieee80211_mgmt *mgmt, size_t len)
2798 {
2799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2800 u8 bssid[ETH_ALEN];
2801 u16 auth_alg, auth_transaction, status_code;
2802 struct ieee80211_event event = {
2803 .type = MLME_EVENT,
2804 .u.mlme.data = AUTH_EVENT,
2805 };
2806
2807 sdata_assert_lock(sdata);
2808
2809 if (len < 24 + 6)
2810 return;
2811
2812 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2813 return;
2814
2815 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2816
2817 if (!ether_addr_equal(bssid, mgmt->bssid))
2818 return;
2819
2820 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2821 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2822 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2823
2824 if (auth_alg != ifmgd->auth_data->algorithm ||
2825 (auth_alg != WLAN_AUTH_SAE &&
2826 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2827 (auth_alg == WLAN_AUTH_SAE &&
2828 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2829 auth_transaction > 2))) {
2830 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2831 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2832 auth_transaction,
2833 ifmgd->auth_data->expected_transaction);
2834 return;
2835 }
2836
2837 if (status_code != WLAN_STATUS_SUCCESS) {
2838 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2839 mgmt->sa, status_code);
2840 ieee80211_destroy_auth_data(sdata, false);
2841 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2842 event.u.mlme.status = MLME_DENIED;
2843 event.u.mlme.reason = status_code;
2844 drv_event_callback(sdata->local, sdata, &event);
2845 return;
2846 }
2847
2848 switch (ifmgd->auth_data->algorithm) {
2849 case WLAN_AUTH_OPEN:
2850 case WLAN_AUTH_LEAP:
2851 case WLAN_AUTH_FT:
2852 case WLAN_AUTH_SAE:
2853 case WLAN_AUTH_FILS_SK:
2854 case WLAN_AUTH_FILS_SK_PFS:
2855 case WLAN_AUTH_FILS_PK:
2856 break;
2857 case WLAN_AUTH_SHARED_KEY:
2858 if (ifmgd->auth_data->expected_transaction != 4) {
2859 ieee80211_auth_challenge(sdata, mgmt, len);
2860 /* need another frame */
2861 return;
2862 }
2863 break;
2864 default:
2865 WARN_ONCE(1, "invalid auth alg %d",
2866 ifmgd->auth_data->algorithm);
2867 return;
2868 }
2869
2870 event.u.mlme.status = MLME_SUCCESS;
2871 drv_event_callback(sdata->local, sdata, &event);
2872 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2873 (auth_transaction == 2 &&
2874 ifmgd->auth_data->expected_transaction == 2)) {
2875 if (!ieee80211_mark_sta_auth(sdata, bssid))
2876 goto out_err;
2877 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2878 auth_transaction == 2) {
2879 sdata_info(sdata, "SAE peer confirmed\n");
2880 ifmgd->auth_data->peer_confirmed = true;
2881 }
2882
2883 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2884 return;
2885 out_err:
2886 mutex_unlock(&sdata->local->sta_mtx);
2887 /* ignore frame -- wait for timeout */
2888 }
2889
2890 #define case_WLAN(type) \
2891 case WLAN_REASON_##type: return #type
2892
2893 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2894 {
2895 switch (reason_code) {
2896 case_WLAN(UNSPECIFIED);
2897 case_WLAN(PREV_AUTH_NOT_VALID);
2898 case_WLAN(DEAUTH_LEAVING);
2899 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2900 case_WLAN(DISASSOC_AP_BUSY);
2901 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2902 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2903 case_WLAN(DISASSOC_STA_HAS_LEFT);
2904 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2905 case_WLAN(DISASSOC_BAD_POWER);
2906 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2907 case_WLAN(INVALID_IE);
2908 case_WLAN(MIC_FAILURE);
2909 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2910 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2911 case_WLAN(IE_DIFFERENT);
2912 case_WLAN(INVALID_GROUP_CIPHER);
2913 case_WLAN(INVALID_PAIRWISE_CIPHER);
2914 case_WLAN(INVALID_AKMP);
2915 case_WLAN(UNSUPP_RSN_VERSION);
2916 case_WLAN(INVALID_RSN_IE_CAP);
2917 case_WLAN(IEEE8021X_FAILED);
2918 case_WLAN(CIPHER_SUITE_REJECTED);
2919 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2920 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2921 case_WLAN(DISASSOC_LOW_ACK);
2922 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2923 case_WLAN(QSTA_LEAVE_QBSS);
2924 case_WLAN(QSTA_NOT_USE);
2925 case_WLAN(QSTA_REQUIRE_SETUP);
2926 case_WLAN(QSTA_TIMEOUT);
2927 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2928 case_WLAN(MESH_PEER_CANCELED);
2929 case_WLAN(MESH_MAX_PEERS);
2930 case_WLAN(MESH_CONFIG);
2931 case_WLAN(MESH_CLOSE);
2932 case_WLAN(MESH_MAX_RETRIES);
2933 case_WLAN(MESH_CONFIRM_TIMEOUT);
2934 case_WLAN(MESH_INVALID_GTK);
2935 case_WLAN(MESH_INCONSISTENT_PARAM);
2936 case_WLAN(MESH_INVALID_SECURITY);
2937 case_WLAN(MESH_PATH_ERROR);
2938 case_WLAN(MESH_PATH_NOFORWARD);
2939 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2940 case_WLAN(MAC_EXISTS_IN_MBSS);
2941 case_WLAN(MESH_CHAN_REGULATORY);
2942 case_WLAN(MESH_CHAN);
2943 default: return "<unknown>";
2944 }
2945 }
2946
2947 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2948 struct ieee80211_mgmt *mgmt, size_t len)
2949 {
2950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2951 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2952
2953 sdata_assert_lock(sdata);
2954
2955 if (len < 24 + 2)
2956 return;
2957
2958 if (ifmgd->associated &&
2959 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2960 const u8 *bssid = ifmgd->associated->bssid;
2961
2962 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2963 bssid, reason_code,
2964 ieee80211_get_reason_code_string(reason_code));
2965
2966 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2967
2968 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2969 reason_code);
2970 return;
2971 }
2972
2973 if (ifmgd->assoc_data &&
2974 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2975 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
2976
2977 sdata_info(sdata,
2978 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2979 bssid, reason_code,
2980 ieee80211_get_reason_code_string(reason_code));
2981
2982 ieee80211_destroy_assoc_data(sdata, false, true);
2983
2984 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2985 return;
2986 }
2987 }
2988
2989
2990 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2991 struct ieee80211_mgmt *mgmt, size_t len)
2992 {
2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2994 u16 reason_code;
2995
2996 sdata_assert_lock(sdata);
2997
2998 if (len < 24 + 2)
2999 return;
3000
3001 if (!ifmgd->associated ||
3002 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3003 return;
3004
3005 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3006
3007 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3008 mgmt->sa, reason_code,
3009 ieee80211_get_reason_code_string(reason_code));
3010
3011 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3012
3013 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3014 }
3015
3016 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3017 u8 *supp_rates, unsigned int supp_rates_len,
3018 u32 *rates, u32 *basic_rates,
3019 bool *have_higher_than_11mbit,
3020 int *min_rate, int *min_rate_index,
3021 int shift)
3022 {
3023 int i, j;
3024
3025 for (i = 0; i < supp_rates_len; i++) {
3026 int rate = supp_rates[i] & 0x7f;
3027 bool is_basic = !!(supp_rates[i] & 0x80);
3028
3029 if ((rate * 5 * (1 << shift)) > 110)
3030 *have_higher_than_11mbit = true;
3031
3032 /*
3033 * Skip HT and VHT BSS membership selectors since they're not
3034 * rates.
3035 *
3036 * Note: Even though the membership selector and the basic
3037 * rate flag share the same bit, they are not exactly
3038 * the same.
3039 */
3040 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3041 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3042 continue;
3043
3044 for (j = 0; j < sband->n_bitrates; j++) {
3045 struct ieee80211_rate *br;
3046 int brate;
3047
3048 br = &sband->bitrates[j];
3049
3050 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3051 if (brate == rate) {
3052 *rates |= BIT(j);
3053 if (is_basic)
3054 *basic_rates |= BIT(j);
3055 if ((rate * 5) < *min_rate) {
3056 *min_rate = rate * 5;
3057 *min_rate_index = j;
3058 }
3059 break;
3060 }
3061 }
3062 }
3063 }
3064
3065 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3066 struct cfg80211_bss *cbss,
3067 struct ieee80211_mgmt *mgmt, size_t len)
3068 {
3069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3070 struct ieee80211_local *local = sdata->local;
3071 struct ieee80211_supported_band *sband;
3072 struct sta_info *sta;
3073 u8 *pos;
3074 u16 capab_info, aid;
3075 struct ieee802_11_elems elems;
3076 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3077 const struct cfg80211_bss_ies *bss_ies = NULL;
3078 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3079 u32 changed = 0;
3080 int err;
3081 bool ret;
3082
3083 /* AssocResp and ReassocResp have identical structure */
3084
3085 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3086 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3087
3088 /*
3089 * The 5 MSB of the AID field are reserved
3090 * (802.11-2016 9.4.1.8 AID field)
3091 */
3092 aid &= 0x7ff;
3093
3094 ifmgd->broken_ap = false;
3095
3096 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3097 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3098 aid);
3099 aid = 0;
3100 ifmgd->broken_ap = true;
3101 }
3102
3103 pos = mgmt->u.assoc_resp.variable;
3104 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3105
3106 if (!elems.supp_rates) {
3107 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3108 return false;
3109 }
3110
3111 ifmgd->aid = aid;
3112 ifmgd->tdls_chan_switch_prohibited =
3113 elems.ext_capab && elems.ext_capab_len >= 5 &&
3114 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3115
3116 /*
3117 * Some APs are erroneously not including some information in their
3118 * (re)association response frames. Try to recover by using the data
3119 * from the beacon or probe response. This seems to afflict mobile
3120 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3121 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3122 */
3123 if ((assoc_data->wmm && !elems.wmm_param) ||
3124 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3125 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3126 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3127 (!elems.vht_cap_elem || !elems.vht_operation))) {
3128 const struct cfg80211_bss_ies *ies;
3129 struct ieee802_11_elems bss_elems;
3130
3131 rcu_read_lock();
3132 ies = rcu_dereference(cbss->ies);
3133 if (ies)
3134 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3135 GFP_ATOMIC);
3136 rcu_read_unlock();
3137 if (!bss_ies)
3138 return false;
3139
3140 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3141 false, &bss_elems);
3142 if (assoc_data->wmm &&
3143 !elems.wmm_param && bss_elems.wmm_param) {
3144 elems.wmm_param = bss_elems.wmm_param;
3145 sdata_info(sdata,
3146 "AP bug: WMM param missing from AssocResp\n");
3147 }
3148
3149 /*
3150 * Also check if we requested HT/VHT, otherwise the AP doesn't
3151 * have to include the IEs in the (re)association response.
3152 */
3153 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3154 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3155 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3156 sdata_info(sdata,
3157 "AP bug: HT capability missing from AssocResp\n");
3158 }
3159 if (!elems.ht_operation && bss_elems.ht_operation &&
3160 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3161 elems.ht_operation = bss_elems.ht_operation;
3162 sdata_info(sdata,
3163 "AP bug: HT operation missing from AssocResp\n");
3164 }
3165 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3166 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3167 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3168 sdata_info(sdata,
3169 "AP bug: VHT capa missing from AssocResp\n");
3170 }
3171 if (!elems.vht_operation && bss_elems.vht_operation &&
3172 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3173 elems.vht_operation = bss_elems.vht_operation;
3174 sdata_info(sdata,
3175 "AP bug: VHT operation missing from AssocResp\n");
3176 }
3177 }
3178
3179 /*
3180 * We previously checked these in the beacon/probe response, so
3181 * they should be present here. This is just a safety net.
3182 */
3183 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3184 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3185 sdata_info(sdata,
3186 "HT AP is missing WMM params or HT capability/operation\n");
3187 ret = false;
3188 goto out;
3189 }
3190
3191 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3192 (!elems.vht_cap_elem || !elems.vht_operation)) {
3193 sdata_info(sdata,
3194 "VHT AP is missing VHT capability/operation\n");
3195 ret = false;
3196 goto out;
3197 }
3198
3199 mutex_lock(&sdata->local->sta_mtx);
3200 /*
3201 * station info was already allocated and inserted before
3202 * the association and should be available to us
3203 */
3204 sta = sta_info_get(sdata, cbss->bssid);
3205 if (WARN_ON(!sta)) {
3206 mutex_unlock(&sdata->local->sta_mtx);
3207 ret = false;
3208 goto out;
3209 }
3210
3211 sband = ieee80211_get_sband(sdata);
3212 if (!sband) {
3213 mutex_unlock(&sdata->local->sta_mtx);
3214 ret = false;
3215 goto out;
3216 }
3217
3218 /*
3219 * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark
3220 * HE as disabled. If on the 5GHz band, make sure it supports VHT.
3221 */
3222 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
3223 (sband->band == NL80211_BAND_5GHZ &&
3224 ifmgd->flags & IEEE80211_STA_DISABLE_VHT) ||
3225 (!elems.he_cap && !elems.he_operation))
3226 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
3227
3228 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3229 (!elems.he_cap || !elems.he_operation)) {
3230 mutex_unlock(&sdata->local->sta_mtx);
3231 sdata_info(sdata,
3232 "HE AP is missing HE capability/operation\n");
3233 ret = false;
3234 goto out;
3235 }
3236
3237 /* Set up internal HT/VHT capabilities */
3238 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3239 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3240 elems.ht_cap_elem, sta);
3241
3242 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3243 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3244 elems.vht_cap_elem, sta);
3245
3246 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3247 elems.he_cap) {
3248 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3249 elems.he_cap,
3250 elems.he_cap_len,
3251 sta);
3252
3253 bss_conf->he_support = sta->sta.he_cap.has_he;
3254 } else {
3255 bss_conf->he_support = false;
3256 }
3257
3258 if (bss_conf->he_support) {
3259 bss_conf->bss_color =
3260 le32_get_bits(elems.he_operation->he_oper_params,
3261 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3262
3263 bss_conf->htc_trig_based_pkt_ext =
3264 le32_get_bits(elems.he_operation->he_oper_params,
3265 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3266 bss_conf->frame_time_rts_th =
3267 le32_get_bits(elems.he_operation->he_oper_params,
3268 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3269
3270 bss_conf->multi_sta_back_32bit =
3271 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3272 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3273
3274 bss_conf->ack_enabled =
3275 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3276 IEEE80211_HE_MAC_CAP2_ACK_EN;
3277
3278 bss_conf->uora_exists = !!elems.uora_element;
3279 if (elems.uora_element)
3280 bss_conf->uora_ocw_range = elems.uora_element[0];
3281
3282 /* TODO: OPEN: what happens if BSS color disable is set? */
3283 }
3284
3285 /*
3286 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3287 * in their association response, so ignore that data for our own
3288 * configuration. If it changed since the last beacon, we'll get the
3289 * next beacon and update then.
3290 */
3291
3292 /*
3293 * If an operating mode notification IE is present, override the
3294 * NSS calculation (that would be done in rate_control_rate_init())
3295 * and use the # of streams from that element.
3296 */
3297 if (elems.opmode_notif &&
3298 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3299 u8 nss;
3300
3301 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3302 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3303 nss += 1;
3304 sta->sta.rx_nss = nss;
3305 }
3306
3307 rate_control_rate_init(sta);
3308
3309 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3310 set_sta_flag(sta, WLAN_STA_MFP);
3311 sta->sta.mfp = true;
3312 } else {
3313 sta->sta.mfp = false;
3314 }
3315
3316 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3317
3318 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3319 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3320 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3321 if (err) {
3322 sdata_info(sdata,
3323 "failed to move station %pM to desired state\n",
3324 sta->sta.addr);
3325 WARN_ON(__sta_info_destroy(sta));
3326 mutex_unlock(&sdata->local->sta_mtx);
3327 ret = false;
3328 goto out;
3329 }
3330
3331 mutex_unlock(&sdata->local->sta_mtx);
3332
3333 /*
3334 * Always handle WMM once after association regardless
3335 * of the first value the AP uses. Setting -1 here has
3336 * that effect because the AP values is an unsigned
3337 * 4-bit value.
3338 */
3339 ifmgd->wmm_last_param_set = -1;
3340
3341 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3342 ieee80211_set_wmm_default(sdata, false, false);
3343 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3344 elems.wmm_param_len,
3345 elems.mu_edca_param_set)) {
3346 /* still enable QoS since we might have HT/VHT */
3347 ieee80211_set_wmm_default(sdata, false, true);
3348 /* set the disable-WMM flag in this case to disable
3349 * tracking WMM parameter changes in the beacon if
3350 * the parameters weren't actually valid. Doing so
3351 * avoids changing parameters very strangely when
3352 * the AP is going back and forth between valid and
3353 * invalid parameters.
3354 */
3355 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3356 }
3357 changed |= BSS_CHANGED_QOS;
3358
3359 if (elems.max_idle_period_ie) {
3360 bss_conf->max_idle_period =
3361 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3362 bss_conf->protected_keep_alive =
3363 !!(elems.max_idle_period_ie->idle_options &
3364 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3365 changed |= BSS_CHANGED_KEEP_ALIVE;
3366 } else {
3367 bss_conf->max_idle_period = 0;
3368 bss_conf->protected_keep_alive = false;
3369 }
3370
3371 /* set AID and assoc capability,
3372 * ieee80211_set_associated() will tell the driver */
3373 bss_conf->aid = aid;
3374 bss_conf->assoc_capability = capab_info;
3375 ieee80211_set_associated(sdata, cbss, changed);
3376
3377 /*
3378 * If we're using 4-addr mode, let the AP know that we're
3379 * doing so, so that it can create the STA VLAN on its side
3380 */
3381 if (ifmgd->use_4addr)
3382 ieee80211_send_4addr_nullfunc(local, sdata);
3383
3384 /*
3385 * Start timer to probe the connection to the AP now.
3386 * Also start the timer that will detect beacon loss.
3387 */
3388 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3389 ieee80211_sta_reset_beacon_monitor(sdata);
3390
3391 ret = true;
3392 out:
3393 kfree(bss_ies);
3394 return ret;
3395 }
3396
3397 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3398 struct ieee80211_mgmt *mgmt,
3399 size_t len)
3400 {
3401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3402 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3403 u16 capab_info, status_code, aid;
3404 struct ieee802_11_elems elems;
3405 int ac, uapsd_queues = -1;
3406 u8 *pos;
3407 bool reassoc;
3408 struct cfg80211_bss *bss;
3409 struct ieee80211_event event = {
3410 .type = MLME_EVENT,
3411 .u.mlme.data = ASSOC_EVENT,
3412 };
3413
3414 sdata_assert_lock(sdata);
3415
3416 if (!assoc_data)
3417 return;
3418 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3419 return;
3420
3421 /*
3422 * AssocResp and ReassocResp have identical structure, so process both
3423 * of them in this function.
3424 */
3425
3426 if (len < 24 + 6)
3427 return;
3428
3429 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3430 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3431 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3432 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3433
3434 sdata_info(sdata,
3435 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3436 reassoc ? "Rea" : "A", mgmt->sa,
3437 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3438
3439 if (assoc_data->fils_kek_len &&
3440 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3441 return;
3442
3443 pos = mgmt->u.assoc_resp.variable;
3444 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3445
3446 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3447 elems.timeout_int &&
3448 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3449 u32 tu, ms;
3450 tu = le32_to_cpu(elems.timeout_int->value);
3451 ms = tu * 1024 / 1000;
3452 sdata_info(sdata,
3453 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3454 mgmt->sa, tu, ms);
3455 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3456 assoc_data->timeout_started = true;
3457 if (ms > IEEE80211_ASSOC_TIMEOUT)
3458 run_again(sdata, assoc_data->timeout);
3459 return;
3460 }
3461
3462 bss = assoc_data->bss;
3463
3464 if (status_code != WLAN_STATUS_SUCCESS) {
3465 sdata_info(sdata, "%pM denied association (code=%d)\n",
3466 mgmt->sa, status_code);
3467 ieee80211_destroy_assoc_data(sdata, false, false);
3468 event.u.mlme.status = MLME_DENIED;
3469 event.u.mlme.reason = status_code;
3470 drv_event_callback(sdata->local, sdata, &event);
3471 } else {
3472 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3473 /* oops -- internal error -- send timeout for now */
3474 ieee80211_destroy_assoc_data(sdata, false, false);
3475 cfg80211_assoc_timeout(sdata->dev, bss);
3476 return;
3477 }
3478 event.u.mlme.status = MLME_SUCCESS;
3479 drv_event_callback(sdata->local, sdata, &event);
3480 sdata_info(sdata, "associated\n");
3481
3482 /*
3483 * destroy assoc_data afterwards, as otherwise an idle
3484 * recalc after assoc_data is NULL but before associated
3485 * is set can cause the interface to go idle
3486 */
3487 ieee80211_destroy_assoc_data(sdata, true, false);
3488
3489 /* get uapsd queues configuration */
3490 uapsd_queues = 0;
3491 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3492 if (sdata->tx_conf[ac].uapsd)
3493 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3494 }
3495
3496 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3497 }
3498
3499 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3500 struct ieee80211_mgmt *mgmt, size_t len,
3501 struct ieee80211_rx_status *rx_status,
3502 struct ieee802_11_elems *elems)
3503 {
3504 struct ieee80211_local *local = sdata->local;
3505 struct ieee80211_bss *bss;
3506 struct ieee80211_channel *channel;
3507
3508 sdata_assert_lock(sdata);
3509
3510 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3511 if (!channel)
3512 return;
3513
3514 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3515 channel);
3516 if (bss) {
3517 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3518 ieee80211_rx_bss_put(local, bss);
3519 }
3520 }
3521
3522
3523 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3524 struct sk_buff *skb)
3525 {
3526 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3527 struct ieee80211_if_managed *ifmgd;
3528 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3529 size_t baselen, len = skb->len;
3530 struct ieee802_11_elems elems;
3531
3532 ifmgd = &sdata->u.mgd;
3533
3534 sdata_assert_lock(sdata);
3535
3536 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3537 return; /* ignore ProbeResp to foreign address */
3538
3539 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3540 if (baselen > len)
3541 return;
3542
3543 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3544 false, &elems);
3545
3546 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3547
3548 if (ifmgd->associated &&
3549 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3550 ieee80211_reset_ap_probe(sdata);
3551 }
3552
3553 /*
3554 * This is the canonical list of information elements we care about,
3555 * the filter code also gives us all changes to the Microsoft OUI
3556 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3557 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3558 * changes to requested client power.
3559 *
3560 * We implement beacon filtering in software since that means we can
3561 * avoid processing the frame here and in cfg80211, and userspace
3562 * will not be able to tell whether the hardware supports it or not.
3563 *
3564 * XXX: This list needs to be dynamic -- userspace needs to be able to
3565 * add items it requires. It also needs to be able to tell us to
3566 * look out for other vendor IEs.
3567 */
3568 static const u64 care_about_ies =
3569 (1ULL << WLAN_EID_COUNTRY) |
3570 (1ULL << WLAN_EID_ERP_INFO) |
3571 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3572 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3573 (1ULL << WLAN_EID_HT_CAPABILITY) |
3574 (1ULL << WLAN_EID_HT_OPERATION) |
3575 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3576
3577 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3578 struct ieee80211_if_managed *ifmgd,
3579 struct ieee80211_bss_conf *bss_conf,
3580 struct ieee80211_local *local,
3581 struct ieee80211_rx_status *rx_status)
3582 {
3583 /* Track average RSSI from the Beacon frames of the current AP */
3584
3585 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3586 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3587 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3588 ifmgd->last_cqm_event_signal = 0;
3589 ifmgd->count_beacon_signal = 1;
3590 ifmgd->last_ave_beacon_signal = 0;
3591 } else {
3592 ifmgd->count_beacon_signal++;
3593 }
3594
3595 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3596
3597 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3598 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3599 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3600 int last_sig = ifmgd->last_ave_beacon_signal;
3601 struct ieee80211_event event = {
3602 .type = RSSI_EVENT,
3603 };
3604
3605 /*
3606 * if signal crosses either of the boundaries, invoke callback
3607 * with appropriate parameters
3608 */
3609 if (sig > ifmgd->rssi_max_thold &&
3610 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3611 ifmgd->last_ave_beacon_signal = sig;
3612 event.u.rssi.data = RSSI_EVENT_HIGH;
3613 drv_event_callback(local, sdata, &event);
3614 } else if (sig < ifmgd->rssi_min_thold &&
3615 (last_sig >= ifmgd->rssi_max_thold ||
3616 last_sig == 0)) {
3617 ifmgd->last_ave_beacon_signal = sig;
3618 event.u.rssi.data = RSSI_EVENT_LOW;
3619 drv_event_callback(local, sdata, &event);
3620 }
3621 }
3622
3623 if (bss_conf->cqm_rssi_thold &&
3624 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3625 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3626 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3627 int last_event = ifmgd->last_cqm_event_signal;
3628 int thold = bss_conf->cqm_rssi_thold;
3629 int hyst = bss_conf->cqm_rssi_hyst;
3630
3631 if (sig < thold &&
3632 (last_event == 0 || sig < last_event - hyst)) {
3633 ifmgd->last_cqm_event_signal = sig;
3634 ieee80211_cqm_rssi_notify(
3635 &sdata->vif,
3636 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3637 sig, GFP_KERNEL);
3638 } else if (sig > thold &&
3639 (last_event == 0 || sig > last_event + hyst)) {
3640 ifmgd->last_cqm_event_signal = sig;
3641 ieee80211_cqm_rssi_notify(
3642 &sdata->vif,
3643 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3644 sig, GFP_KERNEL);
3645 }
3646 }
3647
3648 if (bss_conf->cqm_rssi_low &&
3649 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3650 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3651 int last_event = ifmgd->last_cqm_event_signal;
3652 int low = bss_conf->cqm_rssi_low;
3653 int high = bss_conf->cqm_rssi_high;
3654
3655 if (sig < low &&
3656 (last_event == 0 || last_event >= low)) {
3657 ifmgd->last_cqm_event_signal = sig;
3658 ieee80211_cqm_rssi_notify(
3659 &sdata->vif,
3660 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3661 sig, GFP_KERNEL);
3662 } else if (sig > high &&
3663 (last_event == 0 || last_event <= high)) {
3664 ifmgd->last_cqm_event_signal = sig;
3665 ieee80211_cqm_rssi_notify(
3666 &sdata->vif,
3667 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3668 sig, GFP_KERNEL);
3669 }
3670 }
3671 }
3672
3673 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3674 struct ieee80211_mgmt *mgmt, size_t len,
3675 struct ieee80211_rx_status *rx_status)
3676 {
3677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3678 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3679 size_t baselen;
3680 struct ieee802_11_elems elems;
3681 struct ieee80211_local *local = sdata->local;
3682 struct ieee80211_chanctx_conf *chanctx_conf;
3683 struct ieee80211_channel *chan;
3684 struct sta_info *sta;
3685 u32 changed = 0;
3686 bool erp_valid;
3687 u8 erp_value = 0;
3688 u32 ncrc;
3689 u8 *bssid;
3690 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3691
3692 sdata_assert_lock(sdata);
3693
3694 /* Process beacon from the current BSS */
3695 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3696 if (baselen > len)
3697 return;
3698
3699 rcu_read_lock();
3700 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3701 if (!chanctx_conf) {
3702 rcu_read_unlock();
3703 return;
3704 }
3705
3706 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3707 rcu_read_unlock();
3708 return;
3709 }
3710 chan = chanctx_conf->def.chan;
3711 rcu_read_unlock();
3712
3713 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3714 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3715 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3716 len - baselen, false, &elems);
3717
3718 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3719 if (elems.tim && !elems.parse_error) {
3720 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3721 ifmgd->dtim_period = tim_ie->dtim_period;
3722 }
3723 ifmgd->have_beacon = true;
3724 ifmgd->assoc_data->need_beacon = false;
3725 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3726 sdata->vif.bss_conf.sync_tsf =
3727 le64_to_cpu(mgmt->u.beacon.timestamp);
3728 sdata->vif.bss_conf.sync_device_ts =
3729 rx_status->device_timestamp;
3730 if (elems.tim)
3731 sdata->vif.bss_conf.sync_dtim_count =
3732 elems.tim->dtim_count;
3733 else
3734 sdata->vif.bss_conf.sync_dtim_count = 0;
3735 }
3736 /* continue assoc process */
3737 ifmgd->assoc_data->timeout = jiffies;
3738 ifmgd->assoc_data->timeout_started = true;
3739 run_again(sdata, ifmgd->assoc_data->timeout);
3740 return;
3741 }
3742
3743 if (!ifmgd->associated ||
3744 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3745 return;
3746 bssid = ifmgd->associated->bssid;
3747
3748 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3749 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3750 local, rx_status);
3751
3752 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3753 mlme_dbg_ratelimited(sdata,
3754 "cancelling AP probe due to a received beacon\n");
3755 ieee80211_reset_ap_probe(sdata);
3756 }
3757
3758 /*
3759 * Push the beacon loss detection into the future since
3760 * we are processing a beacon from the AP just now.
3761 */
3762 ieee80211_sta_reset_beacon_monitor(sdata);
3763
3764 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3765 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3766 len - baselen, false, &elems,
3767 care_about_ies, ncrc);
3768
3769 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3770 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3771 if (local->hw.conf.dynamic_ps_timeout > 0) {
3772 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3773 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3774 ieee80211_hw_config(local,
3775 IEEE80211_CONF_CHANGE_PS);
3776 }
3777 ieee80211_send_nullfunc(local, sdata, false);
3778 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3779 local->pspolling = true;
3780
3781 /*
3782 * Here is assumed that the driver will be
3783 * able to send ps-poll frame and receive a
3784 * response even though power save mode is
3785 * enabled, but some drivers might require
3786 * to disable power save here. This needs
3787 * to be investigated.
3788 */
3789 ieee80211_send_pspoll(local, sdata);
3790 }
3791 }
3792
3793 if (sdata->vif.p2p ||
3794 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3795 struct ieee80211_p2p_noa_attr noa = {};
3796 int ret;
3797
3798 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3799 len - baselen,
3800 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3801 (u8 *) &noa, sizeof(noa));
3802 if (ret >= 2) {
3803 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3804 /* valid noa_attr and index changed */
3805 sdata->u.mgd.p2p_noa_index = noa.index;
3806 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3807 changed |= BSS_CHANGED_P2P_PS;
3808 /*
3809 * make sure we update all information, the CRC
3810 * mechanism doesn't look at P2P attributes.
3811 */
3812 ifmgd->beacon_crc_valid = false;
3813 }
3814 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3815 /* noa_attr not found and we had valid noa_attr before */
3816 sdata->u.mgd.p2p_noa_index = -1;
3817 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3818 changed |= BSS_CHANGED_P2P_PS;
3819 ifmgd->beacon_crc_valid = false;
3820 }
3821 }
3822
3823 if (ifmgd->csa_waiting_bcn)
3824 ieee80211_chswitch_post_beacon(sdata);
3825
3826 /*
3827 * Update beacon timing and dtim count on every beacon appearance. This
3828 * will allow the driver to use the most updated values. Do it before
3829 * comparing this one with last received beacon.
3830 * IMPORTANT: These parameters would possibly be out of sync by the time
3831 * the driver will use them. The synchronized view is currently
3832 * guaranteed only in certain callbacks.
3833 */
3834 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3835 sdata->vif.bss_conf.sync_tsf =
3836 le64_to_cpu(mgmt->u.beacon.timestamp);
3837 sdata->vif.bss_conf.sync_device_ts =
3838 rx_status->device_timestamp;
3839 if (elems.tim)
3840 sdata->vif.bss_conf.sync_dtim_count =
3841 elems.tim->dtim_count;
3842 else
3843 sdata->vif.bss_conf.sync_dtim_count = 0;
3844 }
3845
3846 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3847 return;
3848 ifmgd->beacon_crc = ncrc;
3849 ifmgd->beacon_crc_valid = true;
3850
3851 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3852
3853 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3854 rx_status->device_timestamp,
3855 &elems, true);
3856
3857 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3858 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3859 elems.wmm_param_len,
3860 elems.mu_edca_param_set))
3861 changed |= BSS_CHANGED_QOS;
3862
3863 /*
3864 * If we haven't had a beacon before, tell the driver about the
3865 * DTIM period (and beacon timing if desired) now.
3866 */
3867 if (!ifmgd->have_beacon) {
3868 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3869 if (elems.tim)
3870 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3871 else
3872 bss_conf->dtim_period = 1;
3873
3874 changed |= BSS_CHANGED_BEACON_INFO;
3875 ifmgd->have_beacon = true;
3876
3877 mutex_lock(&local->iflist_mtx);
3878 ieee80211_recalc_ps(local);
3879 mutex_unlock(&local->iflist_mtx);
3880
3881 ieee80211_recalc_ps_vif(sdata);
3882 }
3883
3884 if (elems.erp_info) {
3885 erp_valid = true;
3886 erp_value = elems.erp_info[0];
3887 } else {
3888 erp_valid = false;
3889 }
3890 changed |= ieee80211_handle_bss_capability(sdata,
3891 le16_to_cpu(mgmt->u.beacon.capab_info),
3892 erp_valid, erp_value);
3893
3894 mutex_lock(&local->sta_mtx);
3895 sta = sta_info_get(sdata, bssid);
3896
3897 if (ieee80211_config_bw(sdata, sta,
3898 elems.ht_cap_elem, elems.ht_operation,
3899 elems.vht_operation, elems.he_operation,
3900 bssid, &changed)) {
3901 mutex_unlock(&local->sta_mtx);
3902 sdata_info(sdata,
3903 "failed to follow AP %pM bandwidth change, disconnect\n",
3904 bssid);
3905 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3906 WLAN_REASON_DEAUTH_LEAVING,
3907 true, deauth_buf);
3908 ieee80211_report_disconnect(sdata, deauth_buf,
3909 sizeof(deauth_buf), true,
3910 WLAN_REASON_DEAUTH_LEAVING);
3911 return;
3912 }
3913
3914 if (sta && elems.opmode_notif)
3915 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3916 rx_status->band);
3917 mutex_unlock(&local->sta_mtx);
3918
3919 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3920 elems.country_elem,
3921 elems.country_elem_len,
3922 elems.pwr_constr_elem,
3923 elems.cisco_dtpc_elem);
3924
3925 ieee80211_bss_info_change_notify(sdata, changed);
3926 }
3927
3928 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3929 struct sk_buff *skb)
3930 {
3931 struct ieee80211_rx_status *rx_status;
3932 struct ieee80211_mgmt *mgmt;
3933 u16 fc;
3934 struct ieee802_11_elems elems;
3935 int ies_len;
3936
3937 rx_status = (struct ieee80211_rx_status *) skb->cb;
3938 mgmt = (struct ieee80211_mgmt *) skb->data;
3939 fc = le16_to_cpu(mgmt->frame_control);
3940
3941 sdata_lock(sdata);
3942
3943 switch (fc & IEEE80211_FCTL_STYPE) {
3944 case IEEE80211_STYPE_BEACON:
3945 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3946 break;
3947 case IEEE80211_STYPE_PROBE_RESP:
3948 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3949 break;
3950 case IEEE80211_STYPE_AUTH:
3951 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3952 break;
3953 case IEEE80211_STYPE_DEAUTH:
3954 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3955 break;
3956 case IEEE80211_STYPE_DISASSOC:
3957 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3958 break;
3959 case IEEE80211_STYPE_ASSOC_RESP:
3960 case IEEE80211_STYPE_REASSOC_RESP:
3961 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3962 break;
3963 case IEEE80211_STYPE_ACTION:
3964 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3965 ies_len = skb->len -
3966 offsetof(struct ieee80211_mgmt,
3967 u.action.u.chan_switch.variable);
3968
3969 if (ies_len < 0)
3970 break;
3971
3972 ieee802_11_parse_elems(
3973 mgmt->u.action.u.chan_switch.variable,
3974 ies_len, true, &elems);
3975
3976 if (elems.parse_error)
3977 break;
3978
3979 ieee80211_sta_process_chanswitch(sdata,
3980 rx_status->mactime,
3981 rx_status->device_timestamp,
3982 &elems, false);
3983 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3984 ies_len = skb->len -
3985 offsetof(struct ieee80211_mgmt,
3986 u.action.u.ext_chan_switch.variable);
3987
3988 if (ies_len < 0)
3989 break;
3990
3991 ieee802_11_parse_elems(
3992 mgmt->u.action.u.ext_chan_switch.variable,
3993 ies_len, true, &elems);
3994
3995 if (elems.parse_error)
3996 break;
3997
3998 /* for the handling code pretend this was also an IE */
3999 elems.ext_chansw_ie =
4000 &mgmt->u.action.u.ext_chan_switch.data;
4001
4002 ieee80211_sta_process_chanswitch(sdata,
4003 rx_status->mactime,
4004 rx_status->device_timestamp,
4005 &elems, false);
4006 }
4007 break;
4008 }
4009 sdata_unlock(sdata);
4010 }
4011
4012 static void ieee80211_sta_timer(struct timer_list *t)
4013 {
4014 struct ieee80211_sub_if_data *sdata =
4015 from_timer(sdata, t, u.mgd.timer);
4016
4017 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4018 }
4019
4020 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4021 u8 *bssid, u8 reason, bool tx)
4022 {
4023 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4024
4025 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4026 tx, frame_buf);
4027
4028 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4029 reason);
4030 }
4031
4032 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4033 {
4034 struct ieee80211_local *local = sdata->local;
4035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4036 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4037 u32 tx_flags = 0;
4038 u16 trans = 1;
4039 u16 status = 0;
4040 u16 prepare_tx_duration = 0;
4041
4042 sdata_assert_lock(sdata);
4043
4044 if (WARN_ON_ONCE(!auth_data))
4045 return -EINVAL;
4046
4047 auth_data->tries++;
4048
4049 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4050 sdata_info(sdata, "authentication with %pM timed out\n",
4051 auth_data->bss->bssid);
4052
4053 /*
4054 * Most likely AP is not in the range so remove the
4055 * bss struct for that AP.
4056 */
4057 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4058
4059 return -ETIMEDOUT;
4060 }
4061
4062 if (auth_data->algorithm == WLAN_AUTH_SAE)
4063 prepare_tx_duration =
4064 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4065
4066 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4067
4068 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4069 auth_data->bss->bssid, auth_data->tries,
4070 IEEE80211_AUTH_MAX_TRIES);
4071
4072 auth_data->expected_transaction = 2;
4073
4074 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4075 trans = auth_data->sae_trans;
4076 status = auth_data->sae_status;
4077 auth_data->expected_transaction = trans;
4078 }
4079
4080 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4081 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4082 IEEE80211_TX_INTFL_MLME_CONN_TX;
4083
4084 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4085 auth_data->data, auth_data->data_len,
4086 auth_data->bss->bssid,
4087 auth_data->bss->bssid, NULL, 0, 0,
4088 tx_flags);
4089
4090 if (tx_flags == 0) {
4091 if (auth_data->algorithm == WLAN_AUTH_SAE)
4092 auth_data->timeout = jiffies +
4093 IEEE80211_AUTH_TIMEOUT_SAE;
4094 else
4095 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4096 } else {
4097 auth_data->timeout =
4098 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4099 }
4100
4101 auth_data->timeout_started = true;
4102 run_again(sdata, auth_data->timeout);
4103
4104 return 0;
4105 }
4106
4107 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4108 {
4109 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4110 struct ieee80211_local *local = sdata->local;
4111
4112 sdata_assert_lock(sdata);
4113
4114 assoc_data->tries++;
4115 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4116 sdata_info(sdata, "association with %pM timed out\n",
4117 assoc_data->bss->bssid);
4118
4119 /*
4120 * Most likely AP is not in the range so remove the
4121 * bss struct for that AP.
4122 */
4123 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4124
4125 return -ETIMEDOUT;
4126 }
4127
4128 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4129 assoc_data->bss->bssid, assoc_data->tries,
4130 IEEE80211_ASSOC_MAX_TRIES);
4131 ieee80211_send_assoc(sdata);
4132
4133 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4134 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4135 assoc_data->timeout_started = true;
4136 run_again(sdata, assoc_data->timeout);
4137 } else {
4138 assoc_data->timeout =
4139 round_jiffies_up(jiffies +
4140 IEEE80211_ASSOC_TIMEOUT_LONG);
4141 assoc_data->timeout_started = true;
4142 run_again(sdata, assoc_data->timeout);
4143 }
4144
4145 return 0;
4146 }
4147
4148 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4149 __le16 fc, bool acked)
4150 {
4151 struct ieee80211_local *local = sdata->local;
4152
4153 sdata->u.mgd.status_fc = fc;
4154 sdata->u.mgd.status_acked = acked;
4155 sdata->u.mgd.status_received = true;
4156
4157 ieee80211_queue_work(&local->hw, &sdata->work);
4158 }
4159
4160 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4161 {
4162 struct ieee80211_local *local = sdata->local;
4163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4164
4165 sdata_lock(sdata);
4166
4167 if (ifmgd->status_received) {
4168 __le16 fc = ifmgd->status_fc;
4169 bool status_acked = ifmgd->status_acked;
4170
4171 ifmgd->status_received = false;
4172 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4173 if (status_acked) {
4174 if (ifmgd->auth_data->algorithm ==
4175 WLAN_AUTH_SAE)
4176 ifmgd->auth_data->timeout =
4177 jiffies +
4178 IEEE80211_AUTH_TIMEOUT_SAE;
4179 else
4180 ifmgd->auth_data->timeout =
4181 jiffies +
4182 IEEE80211_AUTH_TIMEOUT_SHORT;
4183 run_again(sdata, ifmgd->auth_data->timeout);
4184 } else {
4185 ifmgd->auth_data->timeout = jiffies - 1;
4186 }
4187 ifmgd->auth_data->timeout_started = true;
4188 } else if (ifmgd->assoc_data &&
4189 (ieee80211_is_assoc_req(fc) ||
4190 ieee80211_is_reassoc_req(fc))) {
4191 if (status_acked) {
4192 ifmgd->assoc_data->timeout =
4193 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4194 run_again(sdata, ifmgd->assoc_data->timeout);
4195 } else {
4196 ifmgd->assoc_data->timeout = jiffies - 1;
4197 }
4198 ifmgd->assoc_data->timeout_started = true;
4199 }
4200 }
4201
4202 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4203 time_after(jiffies, ifmgd->auth_data->timeout)) {
4204 if (ifmgd->auth_data->done) {
4205 /*
4206 * ok ... we waited for assoc but userspace didn't,
4207 * so let's just kill the auth data
4208 */
4209 ieee80211_destroy_auth_data(sdata, false);
4210 } else if (ieee80211_auth(sdata)) {
4211 u8 bssid[ETH_ALEN];
4212 struct ieee80211_event event = {
4213 .type = MLME_EVENT,
4214 .u.mlme.data = AUTH_EVENT,
4215 .u.mlme.status = MLME_TIMEOUT,
4216 };
4217
4218 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4219
4220 ieee80211_destroy_auth_data(sdata, false);
4221
4222 cfg80211_auth_timeout(sdata->dev, bssid);
4223 drv_event_callback(sdata->local, sdata, &event);
4224 }
4225 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4226 run_again(sdata, ifmgd->auth_data->timeout);
4227
4228 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4229 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4230 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4231 ieee80211_do_assoc(sdata)) {
4232 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4233 struct ieee80211_event event = {
4234 .type = MLME_EVENT,
4235 .u.mlme.data = ASSOC_EVENT,
4236 .u.mlme.status = MLME_TIMEOUT,
4237 };
4238
4239 ieee80211_destroy_assoc_data(sdata, false, false);
4240 cfg80211_assoc_timeout(sdata->dev, bss);
4241 drv_event_callback(sdata->local, sdata, &event);
4242 }
4243 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4244 run_again(sdata, ifmgd->assoc_data->timeout);
4245
4246 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4247 ifmgd->associated) {
4248 u8 bssid[ETH_ALEN];
4249 int max_tries;
4250
4251 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4252
4253 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4254 max_tries = max_nullfunc_tries;
4255 else
4256 max_tries = max_probe_tries;
4257
4258 /* ACK received for nullfunc probing frame */
4259 if (!ifmgd->probe_send_count)
4260 ieee80211_reset_ap_probe(sdata);
4261 else if (ifmgd->nullfunc_failed) {
4262 if (ifmgd->probe_send_count < max_tries) {
4263 mlme_dbg(sdata,
4264 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4265 bssid, ifmgd->probe_send_count,
4266 max_tries);
4267 ieee80211_mgd_probe_ap_send(sdata);
4268 } else {
4269 mlme_dbg(sdata,
4270 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4271 bssid);
4272 ieee80211_sta_connection_lost(sdata, bssid,
4273 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4274 false);
4275 }
4276 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4277 run_again(sdata, ifmgd->probe_timeout);
4278 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4279 mlme_dbg(sdata,
4280 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4281 bssid, probe_wait_ms);
4282 ieee80211_sta_connection_lost(sdata, bssid,
4283 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4284 } else if (ifmgd->probe_send_count < max_tries) {
4285 mlme_dbg(sdata,
4286 "No probe response from AP %pM after %dms, try %d/%i\n",
4287 bssid, probe_wait_ms,
4288 ifmgd->probe_send_count, max_tries);
4289 ieee80211_mgd_probe_ap_send(sdata);
4290 } else {
4291 /*
4292 * We actually lost the connection ... or did we?
4293 * Let's make sure!
4294 */
4295 mlme_dbg(sdata,
4296 "No probe response from AP %pM after %dms, disconnecting.\n",
4297 bssid, probe_wait_ms);
4298
4299 ieee80211_sta_connection_lost(sdata, bssid,
4300 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4301 }
4302 }
4303
4304 sdata_unlock(sdata);
4305 }
4306
4307 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4308 {
4309 struct ieee80211_sub_if_data *sdata =
4310 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4312
4313 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4314 return;
4315
4316 sdata->u.mgd.connection_loss = false;
4317 ieee80211_queue_work(&sdata->local->hw,
4318 &sdata->u.mgd.beacon_connection_loss_work);
4319 }
4320
4321 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4322 {
4323 struct ieee80211_sub_if_data *sdata =
4324 from_timer(sdata, t, u.mgd.conn_mon_timer);
4325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326 struct ieee80211_local *local = sdata->local;
4327
4328 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4329 return;
4330
4331 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4332 }
4333
4334 static void ieee80211_sta_monitor_work(struct work_struct *work)
4335 {
4336 struct ieee80211_sub_if_data *sdata =
4337 container_of(work, struct ieee80211_sub_if_data,
4338 u.mgd.monitor_work);
4339
4340 ieee80211_mgd_probe_ap(sdata, false);
4341 }
4342
4343 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4344 {
4345 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4346 __ieee80211_stop_poll(sdata);
4347
4348 /* let's probe the connection once */
4349 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4350 ieee80211_queue_work(&sdata->local->hw,
4351 &sdata->u.mgd.monitor_work);
4352 }
4353 }
4354
4355 #ifdef CONFIG_PM
4356 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4357 {
4358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4359 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4360
4361 sdata_lock(sdata);
4362
4363 if (ifmgd->auth_data || ifmgd->assoc_data) {
4364 const u8 *bssid = ifmgd->auth_data ?
4365 ifmgd->auth_data->bss->bssid :
4366 ifmgd->assoc_data->bss->bssid;
4367
4368 /*
4369 * If we are trying to authenticate / associate while suspending,
4370 * cfg80211 won't know and won't actually abort those attempts,
4371 * thus we need to do that ourselves.
4372 */
4373 ieee80211_send_deauth_disassoc(sdata, bssid,
4374 IEEE80211_STYPE_DEAUTH,
4375 WLAN_REASON_DEAUTH_LEAVING,
4376 false, frame_buf);
4377 if (ifmgd->assoc_data)
4378 ieee80211_destroy_assoc_data(sdata, false, true);
4379 if (ifmgd->auth_data)
4380 ieee80211_destroy_auth_data(sdata, false);
4381 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4382 IEEE80211_DEAUTH_FRAME_LEN);
4383 }
4384
4385 /* This is a bit of a hack - we should find a better and more generic
4386 * solution to this. Normally when suspending, cfg80211 will in fact
4387 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4388 * auth (not so important) or assoc (this is the problem) process.
4389 *
4390 * As a consequence, it can happen that we are in the process of both
4391 * associating and suspending, and receive an association response
4392 * after cfg80211 has checked if it needs to disconnect, but before
4393 * we actually set the flag to drop incoming frames. This will then
4394 * cause the workqueue flush to process the association response in
4395 * the suspend, resulting in a successful association just before it
4396 * tries to remove the interface from the driver, which now though
4397 * has a channel context assigned ... this results in issues.
4398 *
4399 * To work around this (for now) simply deauth here again if we're
4400 * now connected.
4401 */
4402 if (ifmgd->associated && !sdata->local->wowlan) {
4403 u8 bssid[ETH_ALEN];
4404 struct cfg80211_deauth_request req = {
4405 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4406 .bssid = bssid,
4407 };
4408
4409 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4410 ieee80211_mgd_deauth(sdata, &req);
4411 }
4412
4413 sdata_unlock(sdata);
4414 }
4415
4416 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4417 {
4418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4419
4420 sdata_lock(sdata);
4421 if (!ifmgd->associated) {
4422 sdata_unlock(sdata);
4423 return;
4424 }
4425
4426 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4427 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4428 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4429 ieee80211_sta_connection_lost(sdata,
4430 ifmgd->associated->bssid,
4431 WLAN_REASON_UNSPECIFIED,
4432 true);
4433 sdata_unlock(sdata);
4434 return;
4435 }
4436 sdata_unlock(sdata);
4437 }
4438 #endif
4439
4440 /* interface setup */
4441 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4442 {
4443 struct ieee80211_if_managed *ifmgd;
4444
4445 ifmgd = &sdata->u.mgd;
4446 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4447 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4448 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4449 ieee80211_beacon_connection_loss_work);
4450 INIT_WORK(&ifmgd->csa_connection_drop_work,
4451 ieee80211_csa_connection_drop_work);
4452 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4453 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4454 ieee80211_tdls_peer_del_work);
4455 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4456 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4457 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4458 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4459 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4460 ieee80211_sta_handle_tspec_ac_params_wk);
4461
4462 ifmgd->flags = 0;
4463 ifmgd->powersave = sdata->wdev.ps;
4464 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4465 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4466 ifmgd->p2p_noa_index = -1;
4467
4468 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4469 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4470 else
4471 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4472
4473 /* Setup TDLS data */
4474 spin_lock_init(&ifmgd->teardown_lock);
4475 ifmgd->teardown_skb = NULL;
4476 ifmgd->orig_teardown_skb = NULL;
4477 }
4478
4479 /* scan finished notification */
4480 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4481 {
4482 struct ieee80211_sub_if_data *sdata;
4483
4484 /* Restart STA timers */
4485 rcu_read_lock();
4486 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4487 if (ieee80211_sdata_running(sdata))
4488 ieee80211_restart_sta_timer(sdata);
4489 }
4490 rcu_read_unlock();
4491 }
4492
4493 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4494 struct cfg80211_bss *cbss)
4495 {
4496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4497 const u8 *ht_cap_ie, *vht_cap_ie;
4498 const struct ieee80211_ht_cap *ht_cap;
4499 const struct ieee80211_vht_cap *vht_cap;
4500 u8 chains = 1;
4501
4502 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4503 return chains;
4504
4505 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4506 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4507 ht_cap = (void *)(ht_cap_ie + 2);
4508 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4509 /*
4510 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4511 * "Tx Unequal Modulation Supported" fields.
4512 */
4513 }
4514
4515 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4516 return chains;
4517
4518 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4519 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4520 u8 nss;
4521 u16 tx_mcs_map;
4522
4523 vht_cap = (void *)(vht_cap_ie + 2);
4524 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4525 for (nss = 8; nss > 0; nss--) {
4526 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4527 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4528 break;
4529 }
4530 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4531 chains = max(chains, nss);
4532 }
4533
4534 return chains;
4535 }
4536
4537 static bool
4538 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4539 const struct ieee80211_he_operation *he_op)
4540 {
4541 const struct ieee80211_sta_he_cap *sta_he_cap =
4542 ieee80211_get_he_sta_cap(sband);
4543 u16 ap_min_req_set;
4544 int i;
4545
4546 if (!sta_he_cap || !he_op)
4547 return false;
4548
4549 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4550
4551 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4552 for (i = 0; i < 3; i++) {
4553 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4554 &sta_he_cap->he_mcs_nss_supp;
4555 u16 sta_mcs_map_rx =
4556 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4557 u16 sta_mcs_map_tx =
4558 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4559 u8 nss;
4560 bool verified = true;
4561
4562 /*
4563 * For each band there is a maximum of 8 spatial streams
4564 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4565 * of 2 bits per NSS (1-8), with the values defined in enum
4566 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4567 * capabilities aren't less than the AP's minimum requirements
4568 * for this HE BSS per SS.
4569 * It is enough to find one such band that meets the reqs.
4570 */
4571 for (nss = 8; nss > 0; nss--) {
4572 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4573 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4574 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4575
4576 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4577 continue;
4578
4579 /*
4580 * Make sure the HE AP doesn't require MCSs that aren't
4581 * supported by the client
4582 */
4583 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4584 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4585 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4586 verified = false;
4587 break;
4588 }
4589 }
4590
4591 if (verified)
4592 return true;
4593 }
4594
4595 /* If here, STA doesn't meet AP's HE min requirements */
4596 return false;
4597 }
4598
4599 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4600 struct cfg80211_bss *cbss)
4601 {
4602 struct ieee80211_local *local = sdata->local;
4603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4604 const struct ieee80211_ht_cap *ht_cap = NULL;
4605 const struct ieee80211_ht_operation *ht_oper = NULL;
4606 const struct ieee80211_vht_operation *vht_oper = NULL;
4607 const struct ieee80211_he_operation *he_oper = NULL;
4608 struct ieee80211_supported_band *sband;
4609 struct cfg80211_chan_def chandef;
4610 int ret;
4611 u32 i;
4612 bool have_80mhz;
4613
4614 sband = local->hw.wiphy->bands[cbss->channel->band];
4615
4616 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4617 IEEE80211_STA_DISABLE_80P80MHZ |
4618 IEEE80211_STA_DISABLE_160MHZ);
4619
4620 rcu_read_lock();
4621
4622 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4623 sband->ht_cap.ht_supported) {
4624 const u8 *ht_oper_ie, *ht_cap_ie;
4625
4626 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4627 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4628 ht_oper = (void *)(ht_oper_ie + 2);
4629
4630 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4631 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4632 ht_cap = (void *)(ht_cap_ie + 2);
4633
4634 if (!ht_cap) {
4635 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4636 ht_oper = NULL;
4637 }
4638 }
4639
4640 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4641 sband->vht_cap.vht_supported) {
4642 const u8 *vht_oper_ie, *vht_cap;
4643
4644 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4645 WLAN_EID_VHT_OPERATION);
4646 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4647 vht_oper = (void *)(vht_oper_ie + 2);
4648 if (vht_oper && !ht_oper) {
4649 vht_oper = NULL;
4650 sdata_info(sdata,
4651 "AP advertised VHT without HT, disabling both\n");
4652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4653 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4654 }
4655
4656 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4657 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4658 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4659 vht_oper = NULL;
4660 }
4661 }
4662
4663 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
4664 ieee80211_get_he_sta_cap(sband)) {
4665 const struct cfg80211_bss_ies *ies;
4666 const u8 *he_oper_ie;
4667
4668 ies = rcu_dereference(cbss->ies);
4669 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4670 ies->data, ies->len);
4671 if (he_oper_ie &&
4672 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4673 he_oper = (void *)(he_oper_ie + 3);
4674 else
4675 he_oper = NULL;
4676
4677 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4678 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4679 }
4680
4681 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4682 have_80mhz = false;
4683 for (i = 0; i < sband->n_channels; i++) {
4684 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4685 IEEE80211_CHAN_NO_80MHZ))
4686 continue;
4687
4688 have_80mhz = true;
4689 break;
4690 }
4691
4692 if (!have_80mhz)
4693 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4694
4695 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4696 cbss->channel,
4697 ht_oper, vht_oper, he_oper,
4698 &chandef, false);
4699
4700 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4701 local->rx_chains);
4702
4703 rcu_read_unlock();
4704
4705 /* will change later if needed */
4706 sdata->smps_mode = IEEE80211_SMPS_OFF;
4707
4708 mutex_lock(&local->mtx);
4709 /*
4710 * If this fails (possibly due to channel context sharing
4711 * on incompatible channels, e.g. 80+80 and 160 sharing the
4712 * same control channel) try to use a smaller bandwidth.
4713 */
4714 ret = ieee80211_vif_use_channel(sdata, &chandef,
4715 IEEE80211_CHANCTX_SHARED);
4716
4717 /* don't downgrade for 5 and 10 MHz channels, though. */
4718 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4719 chandef.width == NL80211_CHAN_WIDTH_10)
4720 goto out;
4721
4722 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4723 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4724 ret = ieee80211_vif_use_channel(sdata, &chandef,
4725 IEEE80211_CHANCTX_SHARED);
4726 }
4727 out:
4728 mutex_unlock(&local->mtx);
4729 return ret;
4730 }
4731
4732 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4733 struct cfg80211_bss *cbss, bool assoc,
4734 bool override)
4735 {
4736 struct ieee80211_local *local = sdata->local;
4737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4738 struct ieee80211_bss *bss = (void *)cbss->priv;
4739 struct sta_info *new_sta = NULL;
4740 struct ieee80211_supported_band *sband;
4741 bool have_sta = false;
4742 int err;
4743
4744 sband = local->hw.wiphy->bands[cbss->channel->band];
4745
4746 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4747 return -EINVAL;
4748
4749 /* If a reconfig is happening, bail out */
4750 if (local->in_reconfig)
4751 return -EBUSY;
4752
4753 if (assoc) {
4754 rcu_read_lock();
4755 have_sta = sta_info_get(sdata, cbss->bssid);
4756 rcu_read_unlock();
4757 }
4758
4759 if (!have_sta) {
4760 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4761 if (!new_sta)
4762 return -ENOMEM;
4763 }
4764
4765 /*
4766 * Set up the information for the new channel before setting the
4767 * new channel. We can't - completely race-free - change the basic
4768 * rates bitmap and the channel (sband) that it refers to, but if
4769 * we set it up before we at least avoid calling into the driver's
4770 * bss_info_changed() method with invalid information (since we do
4771 * call that from changing the channel - only for IDLE and perhaps
4772 * some others, but ...).
4773 *
4774 * So to avoid that, just set up all the new information before the
4775 * channel, but tell the driver to apply it only afterwards, since
4776 * it might need the new channel for that.
4777 */
4778 if (new_sta) {
4779 u32 rates = 0, basic_rates = 0;
4780 bool have_higher_than_11mbit;
4781 int min_rate = INT_MAX, min_rate_index = -1;
4782 const struct cfg80211_bss_ies *ies;
4783 int shift = ieee80211_vif_get_shift(&sdata->vif);
4784
4785 ieee80211_get_rates(sband, bss->supp_rates,
4786 bss->supp_rates_len,
4787 &rates, &basic_rates,
4788 &have_higher_than_11mbit,
4789 &min_rate, &min_rate_index,
4790 shift);
4791
4792 /*
4793 * This used to be a workaround for basic rates missing
4794 * in the association response frame. Now that we no
4795 * longer use the basic rates from there, it probably
4796 * doesn't happen any more, but keep the workaround so
4797 * in case some *other* APs are buggy in different ways
4798 * we can connect -- with a warning.
4799 */
4800 if (!basic_rates && min_rate_index >= 0) {
4801 sdata_info(sdata,
4802 "No basic rates, using min rate instead\n");
4803 basic_rates = BIT(min_rate_index);
4804 }
4805
4806 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4807 sdata->vif.bss_conf.basic_rates = basic_rates;
4808
4809 /* cf. IEEE 802.11 9.2.12 */
4810 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4811 have_higher_than_11mbit)
4812 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4813 else
4814 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4815
4816 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4817
4818 /* set timing information */
4819 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4820 rcu_read_lock();
4821 ies = rcu_dereference(cbss->beacon_ies);
4822 if (ies) {
4823 const u8 *tim_ie;
4824
4825 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4826 sdata->vif.bss_conf.sync_device_ts =
4827 bss->device_ts_beacon;
4828 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4829 ies->data, ies->len);
4830 if (tim_ie && tim_ie[1] >= 2)
4831 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4832 else
4833 sdata->vif.bss_conf.sync_dtim_count = 0;
4834 } else if (!ieee80211_hw_check(&sdata->local->hw,
4835 TIMING_BEACON_ONLY)) {
4836 ies = rcu_dereference(cbss->proberesp_ies);
4837 /* must be non-NULL since beacon IEs were NULL */
4838 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4839 sdata->vif.bss_conf.sync_device_ts =
4840 bss->device_ts_presp;
4841 sdata->vif.bss_conf.sync_dtim_count = 0;
4842 } else {
4843 sdata->vif.bss_conf.sync_tsf = 0;
4844 sdata->vif.bss_conf.sync_device_ts = 0;
4845 sdata->vif.bss_conf.sync_dtim_count = 0;
4846 }
4847 rcu_read_unlock();
4848 }
4849
4850 if (new_sta || override) {
4851 err = ieee80211_prep_channel(sdata, cbss);
4852 if (err) {
4853 if (new_sta)
4854 sta_info_free(local, new_sta);
4855 return -EINVAL;
4856 }
4857 }
4858
4859 if (new_sta) {
4860 /*
4861 * tell driver about BSSID, basic rates and timing
4862 * this was set up above, before setting the channel
4863 */
4864 ieee80211_bss_info_change_notify(sdata,
4865 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4866 BSS_CHANGED_BEACON_INT);
4867
4868 if (assoc)
4869 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4870
4871 err = sta_info_insert(new_sta);
4872 new_sta = NULL;
4873 if (err) {
4874 sdata_info(sdata,
4875 "failed to insert STA entry for the AP (error %d)\n",
4876 err);
4877 return err;
4878 }
4879 } else
4880 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4881
4882 /* Cancel scan to ensure that nothing interferes with connection */
4883 if (local->scanning)
4884 ieee80211_scan_cancel(local);
4885
4886 return 0;
4887 }
4888
4889 /* config hooks */
4890 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4891 struct cfg80211_auth_request *req)
4892 {
4893 struct ieee80211_local *local = sdata->local;
4894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4895 struct ieee80211_mgd_auth_data *auth_data;
4896 u16 auth_alg;
4897 int err;
4898 bool cont_auth;
4899
4900 /* prepare auth data structure */
4901
4902 switch (req->auth_type) {
4903 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4904 auth_alg = WLAN_AUTH_OPEN;
4905 break;
4906 case NL80211_AUTHTYPE_SHARED_KEY:
4907 if (IS_ERR(local->wep_tx_tfm))
4908 return -EOPNOTSUPP;
4909 auth_alg = WLAN_AUTH_SHARED_KEY;
4910 break;
4911 case NL80211_AUTHTYPE_FT:
4912 auth_alg = WLAN_AUTH_FT;
4913 break;
4914 case NL80211_AUTHTYPE_NETWORK_EAP:
4915 auth_alg = WLAN_AUTH_LEAP;
4916 break;
4917 case NL80211_AUTHTYPE_SAE:
4918 auth_alg = WLAN_AUTH_SAE;
4919 break;
4920 case NL80211_AUTHTYPE_FILS_SK:
4921 auth_alg = WLAN_AUTH_FILS_SK;
4922 break;
4923 case NL80211_AUTHTYPE_FILS_SK_PFS:
4924 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4925 break;
4926 case NL80211_AUTHTYPE_FILS_PK:
4927 auth_alg = WLAN_AUTH_FILS_PK;
4928 break;
4929 default:
4930 return -EOPNOTSUPP;
4931 }
4932
4933 if (ifmgd->assoc_data)
4934 return -EBUSY;
4935
4936 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
4937 req->ie_len, GFP_KERNEL);
4938 if (!auth_data)
4939 return -ENOMEM;
4940
4941 auth_data->bss = req->bss;
4942
4943 if (req->auth_data_len >= 4) {
4944 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4945 __le16 *pos = (__le16 *) req->auth_data;
4946
4947 auth_data->sae_trans = le16_to_cpu(pos[0]);
4948 auth_data->sae_status = le16_to_cpu(pos[1]);
4949 }
4950 memcpy(auth_data->data, req->auth_data + 4,
4951 req->auth_data_len - 4);
4952 auth_data->data_len += req->auth_data_len - 4;
4953 }
4954
4955 /* Check if continuing authentication or trying to authenticate with the
4956 * same BSS that we were in the process of authenticating with and avoid
4957 * removal and re-addition of the STA entry in
4958 * ieee80211_prep_connection().
4959 */
4960 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
4961
4962 if (req->ie && req->ie_len) {
4963 memcpy(&auth_data->data[auth_data->data_len],
4964 req->ie, req->ie_len);
4965 auth_data->data_len += req->ie_len;
4966 }
4967
4968 if (req->key && req->key_len) {
4969 auth_data->key_len = req->key_len;
4970 auth_data->key_idx = req->key_idx;
4971 memcpy(auth_data->key, req->key, req->key_len);
4972 }
4973
4974 auth_data->algorithm = auth_alg;
4975
4976 /* try to authenticate/probe */
4977
4978 if (ifmgd->auth_data) {
4979 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
4980 auth_data->peer_confirmed =
4981 ifmgd->auth_data->peer_confirmed;
4982 }
4983 ieee80211_destroy_auth_data(sdata, cont_auth);
4984 }
4985
4986 /* prep auth_data so we don't go into idle on disassoc */
4987 ifmgd->auth_data = auth_data;
4988
4989 /* If this is continuation of an ongoing SAE authentication exchange
4990 * (i.e., request to send SAE Confirm) and the peer has already
4991 * confirmed, mark authentication completed since we are about to send
4992 * out SAE Confirm.
4993 */
4994 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
4995 auth_data->peer_confirmed && auth_data->sae_trans == 2)
4996 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
4997
4998 if (ifmgd->associated) {
4999 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5000
5001 sdata_info(sdata,
5002 "disconnect from AP %pM for new auth to %pM\n",
5003 ifmgd->associated->bssid, req->bss->bssid);
5004 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5005 WLAN_REASON_UNSPECIFIED,
5006 false, frame_buf);
5007
5008 ieee80211_report_disconnect(sdata, frame_buf,
5009 sizeof(frame_buf), true,
5010 WLAN_REASON_UNSPECIFIED);
5011 }
5012
5013 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5014
5015 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5016 if (err)
5017 goto err_clear;
5018
5019 err = ieee80211_auth(sdata);
5020 if (err) {
5021 sta_info_destroy_addr(sdata, req->bss->bssid);
5022 goto err_clear;
5023 }
5024
5025 /* hold our own reference */
5026 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5027 return 0;
5028
5029 err_clear:
5030 eth_zero_addr(ifmgd->bssid);
5031 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5032 ifmgd->auth_data = NULL;
5033 mutex_lock(&sdata->local->mtx);
5034 ieee80211_vif_release_channel(sdata);
5035 mutex_unlock(&sdata->local->mtx);
5036 kfree(auth_data);
5037 return err;
5038 }
5039
5040 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5041 struct cfg80211_assoc_request *req)
5042 {
5043 struct ieee80211_local *local = sdata->local;
5044 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5045 struct ieee80211_bss *bss = (void *)req->bss->priv;
5046 struct ieee80211_mgd_assoc_data *assoc_data;
5047 const struct cfg80211_bss_ies *beacon_ies;
5048 struct ieee80211_supported_band *sband;
5049 const u8 *ssidie, *ht_ie, *vht_ie;
5050 int i, err;
5051 bool override = false;
5052
5053 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5054 if (!assoc_data)
5055 return -ENOMEM;
5056
5057 rcu_read_lock();
5058 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5059 if (!ssidie) {
5060 rcu_read_unlock();
5061 kfree(assoc_data);
5062 return -EINVAL;
5063 }
5064 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5065 assoc_data->ssid_len = ssidie[1];
5066 rcu_read_unlock();
5067
5068 if (ifmgd->associated) {
5069 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5070
5071 sdata_info(sdata,
5072 "disconnect from AP %pM for new assoc to %pM\n",
5073 ifmgd->associated->bssid, req->bss->bssid);
5074 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5075 WLAN_REASON_UNSPECIFIED,
5076 false, frame_buf);
5077
5078 ieee80211_report_disconnect(sdata, frame_buf,
5079 sizeof(frame_buf), true,
5080 WLAN_REASON_UNSPECIFIED);
5081 }
5082
5083 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5084 err = -EBUSY;
5085 goto err_free;
5086 }
5087
5088 if (ifmgd->assoc_data) {
5089 err = -EBUSY;
5090 goto err_free;
5091 }
5092
5093 if (ifmgd->auth_data) {
5094 bool match;
5095
5096 /* keep sta info, bssid if matching */
5097 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5098 ieee80211_destroy_auth_data(sdata, match);
5099 }
5100
5101 /* prepare assoc data */
5102
5103 ifmgd->beacon_crc_valid = false;
5104
5105 assoc_data->wmm = bss->wmm_used &&
5106 (local->hw.queues >= IEEE80211_NUM_ACS);
5107
5108 /*
5109 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5110 * We still associate in non-HT mode (11a/b/g) if any one of these
5111 * ciphers is configured as pairwise.
5112 * We can set this to true for non-11n hardware, that'll be checked
5113 * separately along with the peer capabilities.
5114 */
5115 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5116 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5117 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5118 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5119 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5120 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5121 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5122 netdev_info(sdata->dev,
5123 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5124 }
5125 }
5126
5127 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5128 sband = local->hw.wiphy->bands[req->bss->channel->band];
5129 if (!sband->ht_cap.ht_supported ||
5130 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5131 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5132 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5133 if (!bss->wmm_used &&
5134 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5135 netdev_info(sdata->dev,
5136 "disabling HT as WMM/QoS is not supported by the AP\n");
5137 }
5138
5139 /* disable VHT if we don't support it or the AP doesn't use WMM */
5140 if (!sband->vht_cap.vht_supported ||
5141 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5142 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5143 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5144 if (!bss->wmm_used &&
5145 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5146 netdev_info(sdata->dev,
5147 "disabling VHT as WMM/QoS is not supported by the AP\n");
5148 }
5149
5150 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5151 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5152 sizeof(ifmgd->ht_capa_mask));
5153
5154 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5155 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5156 sizeof(ifmgd->vht_capa_mask));
5157
5158 if (req->ie && req->ie_len) {
5159 memcpy(assoc_data->ie, req->ie, req->ie_len);
5160 assoc_data->ie_len = req->ie_len;
5161 }
5162
5163 if (req->fils_kek) {
5164 /* should already be checked in cfg80211 - so warn */
5165 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5166 err = -EINVAL;
5167 goto err_free;
5168 }
5169 memcpy(assoc_data->fils_kek, req->fils_kek,
5170 req->fils_kek_len);
5171 assoc_data->fils_kek_len = req->fils_kek_len;
5172 }
5173
5174 if (req->fils_nonces)
5175 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5176 2 * FILS_NONCE_LEN);
5177
5178 assoc_data->bss = req->bss;
5179
5180 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5181 if (ifmgd->powersave)
5182 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5183 else
5184 sdata->smps_mode = IEEE80211_SMPS_OFF;
5185 } else
5186 sdata->smps_mode = ifmgd->req_smps;
5187
5188 assoc_data->capability = req->bss->capability;
5189 assoc_data->supp_rates = bss->supp_rates;
5190 assoc_data->supp_rates_len = bss->supp_rates_len;
5191
5192 rcu_read_lock();
5193 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5194 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5195 assoc_data->ap_ht_param =
5196 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5197 else
5198 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5199 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5200 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5201 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5202 sizeof(struct ieee80211_vht_cap));
5203 else
5204 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5205 rcu_read_unlock();
5206
5207 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5208 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5209 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5210 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5211
5212 if (bss->wmm_used && bss->uapsd_supported &&
5213 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5214 assoc_data->uapsd = true;
5215 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5216 } else {
5217 assoc_data->uapsd = false;
5218 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5219 }
5220
5221 if (req->prev_bssid)
5222 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5223
5224 if (req->use_mfp) {
5225 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5226 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5227 } else {
5228 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5229 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5230 }
5231
5232 if (req->flags & ASSOC_REQ_USE_RRM)
5233 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5234 else
5235 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5236
5237 if (req->crypto.control_port)
5238 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5239 else
5240 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5241
5242 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5243 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5244 sdata->control_port_over_nl80211 =
5245 req->crypto.control_port_over_nl80211;
5246 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5247 sdata->vif.type);
5248
5249 /* kick off associate process */
5250
5251 ifmgd->assoc_data = assoc_data;
5252 ifmgd->dtim_period = 0;
5253 ifmgd->have_beacon = false;
5254
5255 /* override HT/VHT configuration only if the AP and we support it */
5256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5257 struct ieee80211_sta_ht_cap sta_ht_cap;
5258
5259 if (req->flags & ASSOC_REQ_DISABLE_HT)
5260 override = true;
5261
5262 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5263 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5264
5265 /* check for 40 MHz disable override */
5266 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5267 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5268 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5269 override = true;
5270
5271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5272 req->flags & ASSOC_REQ_DISABLE_VHT)
5273 override = true;
5274 }
5275
5276 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5277 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5278 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5279 }
5280
5281 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5282 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5283
5284 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5285 if (err)
5286 goto err_clear;
5287
5288 rcu_read_lock();
5289 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5290
5291 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5292 !beacon_ies) {
5293 /*
5294 * Wait up to one beacon interval ...
5295 * should this be more if we miss one?
5296 */
5297 sdata_info(sdata, "waiting for beacon from %pM\n",
5298 ifmgd->bssid);
5299 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5300 assoc_data->timeout_started = true;
5301 assoc_data->need_beacon = true;
5302 } else if (beacon_ies) {
5303 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
5304 beacon_ies->data,
5305 beacon_ies->len);
5306 u8 dtim_count = 0;
5307
5308 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
5309 const struct ieee80211_tim_ie *tim;
5310 tim = (void *)(tim_ie + 2);
5311 ifmgd->dtim_period = tim->dtim_period;
5312 dtim_count = tim->dtim_count;
5313 }
5314 ifmgd->have_beacon = true;
5315 assoc_data->timeout = jiffies;
5316 assoc_data->timeout_started = true;
5317
5318 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5319 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5320 sdata->vif.bss_conf.sync_device_ts =
5321 bss->device_ts_beacon;
5322 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5323 }
5324 } else {
5325 assoc_data->timeout = jiffies;
5326 assoc_data->timeout_started = true;
5327 }
5328 rcu_read_unlock();
5329
5330 run_again(sdata, assoc_data->timeout);
5331
5332 if (bss->corrupt_data) {
5333 char *corrupt_type = "data";
5334 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5335 if (bss->corrupt_data &
5336 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5337 corrupt_type = "beacon and probe response";
5338 else
5339 corrupt_type = "beacon";
5340 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5341 corrupt_type = "probe response";
5342 sdata_info(sdata, "associating with AP with corrupt %s\n",
5343 corrupt_type);
5344 }
5345
5346 return 0;
5347 err_clear:
5348 eth_zero_addr(ifmgd->bssid);
5349 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5350 ifmgd->assoc_data = NULL;
5351 err_free:
5352 kfree(assoc_data);
5353 return err;
5354 }
5355
5356 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5357 struct cfg80211_deauth_request *req)
5358 {
5359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5360 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5361 bool tx = !req->local_state_change;
5362
5363 if (ifmgd->auth_data &&
5364 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5365 sdata_info(sdata,
5366 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5367 req->bssid, req->reason_code,
5368 ieee80211_get_reason_code_string(req->reason_code));
5369
5370 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5371 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5372 IEEE80211_STYPE_DEAUTH,
5373 req->reason_code, tx,
5374 frame_buf);
5375 ieee80211_destroy_auth_data(sdata, false);
5376 ieee80211_report_disconnect(sdata, frame_buf,
5377 sizeof(frame_buf), true,
5378 req->reason_code);
5379
5380 return 0;
5381 }
5382
5383 if (ifmgd->assoc_data &&
5384 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5385 sdata_info(sdata,
5386 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5387 req->bssid, req->reason_code,
5388 ieee80211_get_reason_code_string(req->reason_code));
5389
5390 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5391 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5392 IEEE80211_STYPE_DEAUTH,
5393 req->reason_code, tx,
5394 frame_buf);
5395 ieee80211_destroy_assoc_data(sdata, false, true);
5396 ieee80211_report_disconnect(sdata, frame_buf,
5397 sizeof(frame_buf), true,
5398 req->reason_code);
5399 return 0;
5400 }
5401
5402 if (ifmgd->associated &&
5403 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5404 sdata_info(sdata,
5405 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5406 req->bssid, req->reason_code,
5407 ieee80211_get_reason_code_string(req->reason_code));
5408
5409 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5410 req->reason_code, tx, frame_buf);
5411 ieee80211_report_disconnect(sdata, frame_buf,
5412 sizeof(frame_buf), true,
5413 req->reason_code);
5414 return 0;
5415 }
5416
5417 return -ENOTCONN;
5418 }
5419
5420 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5421 struct cfg80211_disassoc_request *req)
5422 {
5423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5424 u8 bssid[ETH_ALEN];
5425 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5426
5427 /*
5428 * cfg80211 should catch this ... but it's racy since
5429 * we can receive a disassoc frame, process it, hand it
5430 * to cfg80211 while that's in a locked section already
5431 * trying to tell us that the user wants to disconnect.
5432 */
5433 if (ifmgd->associated != req->bss)
5434 return -ENOLINK;
5435
5436 sdata_info(sdata,
5437 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5438 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5439
5440 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5441 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5442 req->reason_code, !req->local_state_change,
5443 frame_buf);
5444
5445 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5446 req->reason_code);
5447
5448 return 0;
5449 }
5450
5451 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5452 {
5453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5454
5455 /*
5456 * Make sure some work items will not run after this,
5457 * they will not do anything but might not have been
5458 * cancelled when disconnecting.
5459 */
5460 cancel_work_sync(&ifmgd->monitor_work);
5461 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5462 cancel_work_sync(&ifmgd->request_smps_work);
5463 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5464 cancel_work_sync(&ifmgd->chswitch_work);
5465 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5466
5467 sdata_lock(sdata);
5468 if (ifmgd->assoc_data) {
5469 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5470 ieee80211_destroy_assoc_data(sdata, false, false);
5471 cfg80211_assoc_timeout(sdata->dev, bss);
5472 }
5473 if (ifmgd->auth_data)
5474 ieee80211_destroy_auth_data(sdata, false);
5475 spin_lock_bh(&ifmgd->teardown_lock);
5476 if (ifmgd->teardown_skb) {
5477 kfree_skb(ifmgd->teardown_skb);
5478 ifmgd->teardown_skb = NULL;
5479 ifmgd->orig_teardown_skb = NULL;
5480 }
5481 spin_unlock_bh(&ifmgd->teardown_lock);
5482 del_timer_sync(&ifmgd->timer);
5483 sdata_unlock(sdata);
5484 }
5485
5486 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5487 enum nl80211_cqm_rssi_threshold_event rssi_event,
5488 s32 rssi_level,
5489 gfp_t gfp)
5490 {
5491 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5492
5493 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5494
5495 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5496 }
5497 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5498
5499 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5500 {
5501 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5502
5503 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5504
5505 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5506 }
5507 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support