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Merge tag 'dmaengine-fix-5.2' of git://git.infradead.org/users/vkoul/slave-dma
[linux-2.6/linux-2.6-arm.git] / net / mac80211 / mlme.c
blob379d2ab6d327881dc27b2662749aa54889709ca2
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * BSS client mode implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11 * Copyright (C) 2018 - 2019 Intel Corporation
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <linux/export.h>
24 #include <net/mac80211.h>
25 #include <asm/unaligned.h>
26
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
29 #include "rate.h"
30 #include "led.h"
31 #include "fils_aead.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
61 */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 /*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
82
83 /*
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
86 */
87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88
89 /*
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
97 * do that.
98 */
99 static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
101 {
102 sdata_assert_lock(sdata);
103
104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
107 }
108
109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
110 {
111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
112 return;
113
114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
115 return;
116
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
119 }
120
121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
122 {
123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
124
125 if (unlikely(!ifmgd->associated))
126 return;
127
128 if (ifmgd->probe_send_count)
129 ifmgd->probe_send_count = 0;
130
131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
132 return;
133
134 mod_timer(&ifmgd->conn_mon_timer,
135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
136 }
137
138 static int ecw2cw(int ecw)
139 {
140 return (1 << ecw) - 1;
141 }
142
143 static u32
144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
145 struct ieee80211_supported_band *sband,
146 struct ieee80211_channel *channel,
147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
149 const struct ieee80211_he_operation *he_oper,
150 struct cfg80211_chan_def *chandef, bool tracking)
151 {
152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
153 struct cfg80211_chan_def vht_chandef;
154 struct ieee80211_sta_ht_cap sta_ht_cap;
155 u32 ht_cfreq, ret;
156
157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sta_ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 ieee80211_chandef_ht_oper(ht_oper, chandef);
194 } else {
195 /* 40 MHz (and 80 MHz) must be supported for VHT */
196 ret = IEEE80211_STA_DISABLE_VHT;
197 /* also mark 40 MHz disabled */
198 ret |= IEEE80211_STA_DISABLE_40MHZ;
199 goto out;
200 }
201
202 if (!vht_oper || !sband->vht_cap.vht_supported) {
203 ret = IEEE80211_STA_DISABLE_VHT;
204 goto out;
205 }
206
207 vht_chandef = *chandef;
208 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper &&
209 (le32_to_cpu(he_oper->he_oper_params) &
210 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
211 struct ieee80211_vht_operation he_oper_vht_cap;
212
213 /*
214 * Set only first 3 bytes (other 2 aren't used in
215 * ieee80211_chandef_vht_oper() anyway)
216 */
217 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
218 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
219
220 if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
221 &he_oper_vht_cap, ht_oper,
222 &vht_chandef)) {
223 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
224 sdata_info(sdata,
225 "HE AP VHT information is invalid, disable HE\n");
226 ret = IEEE80211_STA_DISABLE_HE;
227 goto out;
228 }
229 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper,
230 ht_oper, &vht_chandef)) {
231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
232 sdata_info(sdata,
233 "AP VHT information is invalid, disable VHT\n");
234 ret = IEEE80211_STA_DISABLE_VHT;
235 goto out;
236 }
237
238 if (!cfg80211_chandef_valid(&vht_chandef)) {
239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
240 sdata_info(sdata,
241 "AP VHT information is invalid, disable VHT\n");
242 ret = IEEE80211_STA_DISABLE_VHT;
243 goto out;
244 }
245
246 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
247 ret = 0;
248 goto out;
249 }
250
251 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
252 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
253 sdata_info(sdata,
254 "AP VHT information doesn't match HT, disable VHT\n");
255 ret = IEEE80211_STA_DISABLE_VHT;
256 goto out;
257 }
258
259 *chandef = vht_chandef;
260
261 ret = 0;
262
263 out:
264 /*
265 * When tracking the current AP, don't do any further checks if the
266 * new chandef is identical to the one we're currently using for the
267 * connection. This keeps us from playing ping-pong with regulatory,
268 * without it the following can happen (for example):
269 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
270 * - AP advertises regdom US
271 * - CRDA loads regdom US with 80 MHz prohibited (old database)
272 * - the code below detects an unsupported channel, downgrades, and
273 * we disconnect from the AP in the caller
274 * - disconnect causes CRDA to reload world regdomain and the game
275 * starts anew.
276 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
277 *
278 * It seems possible that there are still scenarios with CSA or real
279 * bandwidth changes where a this could happen, but those cases are
280 * less common and wouldn't completely prevent using the AP.
281 */
282 if (tracking &&
283 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
284 return ret;
285
286 /* don't print the message below for VHT mismatch if VHT is disabled */
287 if (ret & IEEE80211_STA_DISABLE_VHT)
288 vht_chandef = *chandef;
289
290 /*
291 * Ignore the DISABLED flag when we're already connected and only
292 * tracking the APs beacon for bandwidth changes - otherwise we
293 * might get disconnected here if we connect to an AP, update our
294 * regulatory information based on the AP's country IE and the
295 * information we have is wrong/outdated and disables the channel
296 * that we're actually using for the connection to the AP.
297 */
298 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
299 tracking ? 0 :
300 IEEE80211_CHAN_DISABLED)) {
301 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
302 ret = IEEE80211_STA_DISABLE_HT |
303 IEEE80211_STA_DISABLE_VHT;
304 break;
305 }
306
307 ret |= ieee80211_chandef_downgrade(chandef);
308 }
309
310 if (chandef->width != vht_chandef.width && !tracking)
311 sdata_info(sdata,
312 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
313
314 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
315 return ret;
316 }
317
318 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
319 struct sta_info *sta,
320 const struct ieee80211_ht_cap *ht_cap,
321 const struct ieee80211_ht_operation *ht_oper,
322 const struct ieee80211_vht_operation *vht_oper,
323 const struct ieee80211_he_operation *he_oper,
324 const u8 *bssid, u32 *changed)
325 {
326 struct ieee80211_local *local = sdata->local;
327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
328 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan;
329 struct ieee80211_supported_band *sband =
330 local->hw.wiphy->bands[chan->band];
331 struct cfg80211_chan_def chandef;
332 u16 ht_opmode;
333 u32 flags;
334 enum ieee80211_sta_rx_bandwidth new_sta_bw;
335 int ret;
336
337 /* if HT was/is disabled, don't track any bandwidth changes */
338 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
339 return 0;
340
341 /* don't check VHT if we associated as non-VHT station */
342 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
343 vht_oper = NULL;
344
345 /* don't check HE if we associated as non-HE station */
346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
347 !ieee80211_get_he_sta_cap(sband))
348 he_oper = NULL;
349
350 if (WARN_ON_ONCE(!sta))
351 return -EINVAL;
352
353 /*
354 * if bss configuration changed store the new one -
355 * this may be applicable even if channel is identical
356 */
357 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
358 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
359 *changed |= BSS_CHANGED_HT;
360 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
361 }
362
363 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
364 flags = ieee80211_determine_chantype(sdata, sband, chan,
365 ht_oper, vht_oper, he_oper,
366 &chandef, true);
367
368 /*
369 * Downgrade the new channel if we associated with restricted
370 * capabilities. For example, if we associated as a 20 MHz STA
371 * to a 40 MHz AP (due to regulatory, capabilities or config
372 * reasons) then switching to a 40 MHz channel now won't do us
373 * any good -- we couldn't use it with the AP.
374 */
375 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
376 chandef.width == NL80211_CHAN_WIDTH_80P80)
377 flags |= ieee80211_chandef_downgrade(&chandef);
378 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
379 chandef.width == NL80211_CHAN_WIDTH_160)
380 flags |= ieee80211_chandef_downgrade(&chandef);
381 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
382 chandef.width > NL80211_CHAN_WIDTH_20)
383 flags |= ieee80211_chandef_downgrade(&chandef);
384
385 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
386 return 0;
387
388 sdata_info(sdata,
389 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
390 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
391 chandef.center_freq1, chandef.center_freq2);
392
393 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
394 IEEE80211_STA_DISABLE_VHT |
395 IEEE80211_STA_DISABLE_40MHZ |
396 IEEE80211_STA_DISABLE_80P80MHZ |
397 IEEE80211_STA_DISABLE_160MHZ)) ||
398 !cfg80211_chandef_valid(&chandef)) {
399 sdata_info(sdata,
400 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
401 ifmgd->bssid);
402 return -EINVAL;
403 }
404
405 switch (chandef.width) {
406 case NL80211_CHAN_WIDTH_20_NOHT:
407 case NL80211_CHAN_WIDTH_20:
408 new_sta_bw = IEEE80211_STA_RX_BW_20;
409 break;
410 case NL80211_CHAN_WIDTH_40:
411 new_sta_bw = IEEE80211_STA_RX_BW_40;
412 break;
413 case NL80211_CHAN_WIDTH_80:
414 new_sta_bw = IEEE80211_STA_RX_BW_80;
415 break;
416 case NL80211_CHAN_WIDTH_80P80:
417 case NL80211_CHAN_WIDTH_160:
418 new_sta_bw = IEEE80211_STA_RX_BW_160;
419 break;
420 default:
421 return -EINVAL;
422 }
423
424 if (new_sta_bw > sta->cur_max_bandwidth)
425 new_sta_bw = sta->cur_max_bandwidth;
426
427 if (new_sta_bw < sta->sta.bandwidth) {
428 sta->sta.bandwidth = new_sta_bw;
429 rate_control_rate_update(local, sband, sta,
430 IEEE80211_RC_BW_CHANGED);
431 }
432
433 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
434 if (ret) {
435 sdata_info(sdata,
436 "AP %pM changed bandwidth to incompatible one - disconnect\n",
437 ifmgd->bssid);
438 return ret;
439 }
440
441 if (new_sta_bw > sta->sta.bandwidth) {
442 sta->sta.bandwidth = new_sta_bw;
443 rate_control_rate_update(local, sband, sta,
444 IEEE80211_RC_BW_CHANGED);
445 }
446
447 return 0;
448 }
449
450 /* frame sending functions */
451
452 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
453 struct sk_buff *skb, u8 ap_ht_param,
454 struct ieee80211_supported_band *sband,
455 struct ieee80211_channel *channel,
456 enum ieee80211_smps_mode smps)
457 {
458 u8 *pos;
459 u32 flags = channel->flags;
460 u16 cap;
461 struct ieee80211_sta_ht_cap ht_cap;
462
463 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
464
465 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
466 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
467
468 /* determine capability flags */
469 cap = ht_cap.cap;
470
471 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
472 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
473 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
475 cap &= ~IEEE80211_HT_CAP_SGI_40;
476 }
477 break;
478 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
479 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
480 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
481 cap &= ~IEEE80211_HT_CAP_SGI_40;
482 }
483 break;
484 }
485
486 /*
487 * If 40 MHz was disabled associate as though we weren't
488 * capable of 40 MHz -- some broken APs will never fall
489 * back to trying to transmit in 20 MHz.
490 */
491 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
492 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
493 cap &= ~IEEE80211_HT_CAP_SGI_40;
494 }
495
496 /* set SM PS mode properly */
497 cap &= ~IEEE80211_HT_CAP_SM_PS;
498 switch (smps) {
499 case IEEE80211_SMPS_AUTOMATIC:
500 case IEEE80211_SMPS_NUM_MODES:
501 WARN_ON(1);
502 /* fall through */
503 case IEEE80211_SMPS_OFF:
504 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
505 IEEE80211_HT_CAP_SM_PS_SHIFT;
506 break;
507 case IEEE80211_SMPS_STATIC:
508 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
509 IEEE80211_HT_CAP_SM_PS_SHIFT;
510 break;
511 case IEEE80211_SMPS_DYNAMIC:
512 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
513 IEEE80211_HT_CAP_SM_PS_SHIFT;
514 break;
515 }
516
517 /* reserve and fill IE */
518 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
519 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
520 }
521
522 /* This function determines vht capability flags for the association
523 * and builds the IE.
524 * Note - the function may set the owner of the MU-MIMO capability
525 */
526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
527 struct sk_buff *skb,
528 struct ieee80211_supported_band *sband,
529 struct ieee80211_vht_cap *ap_vht_cap)
530 {
531 struct ieee80211_local *local = sdata->local;
532 u8 *pos;
533 u32 cap;
534 struct ieee80211_sta_vht_cap vht_cap;
535 u32 mask, ap_bf_sts, our_bf_sts;
536
537 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
538
539 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
540 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
541
542 /* determine capability flags */
543 cap = vht_cap.cap;
544
545 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
546 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
547
548 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
549 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
550 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
551 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
552 }
553
554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
556 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
557 }
558
559 /*
560 * Some APs apparently get confused if our capabilities are better
561 * than theirs, so restrict what we advertise in the assoc request.
562 */
563 if (!(ap_vht_cap->vht_cap_info &
564 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
565 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
566 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
567 else if (!(ap_vht_cap->vht_cap_info &
568 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
569 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
570
571 /*
572 * If some other vif is using the MU-MIMO capablity we cannot associate
573 * using MU-MIMO - this will lead to contradictions in the group-id
574 * mechanism.
575 * Ownership is defined since association request, in order to avoid
576 * simultaneous associations with MU-MIMO.
577 */
578 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
579 bool disable_mu_mimo = false;
580 struct ieee80211_sub_if_data *other;
581
582 list_for_each_entry_rcu(other, &local->interfaces, list) {
583 if (other->vif.mu_mimo_owner) {
584 disable_mu_mimo = true;
585 break;
586 }
587 }
588 if (disable_mu_mimo)
589 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
590 else
591 sdata->vif.mu_mimo_owner = true;
592 }
593
594 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
595
596 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
597 our_bf_sts = cap & mask;
598
599 if (ap_bf_sts < our_bf_sts) {
600 cap &= ~mask;
601 cap |= ap_bf_sts;
602 }
603
604 /* reserve and fill IE */
605 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
606 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
607 }
608
609 /* This function determines HE capability flags for the association
610 * and builds the IE.
611 */
612 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
613 struct sk_buff *skb,
614 struct ieee80211_supported_band *sband)
615 {
616 u8 *pos;
617 const struct ieee80211_sta_he_cap *he_cap = NULL;
618 u8 he_cap_size;
619
620 he_cap = ieee80211_get_he_sta_cap(sband);
621 if (!he_cap)
622 return;
623
624 /*
625 * TODO: the 1 added is because this temporarily is under the EXTENSION
626 * IE. Get rid of it when it moves.
627 */
628 he_cap_size =
629 2 + 1 + sizeof(he_cap->he_cap_elem) +
630 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
631 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
632 he_cap->he_cap_elem.phy_cap_info);
633 pos = skb_put(skb, he_cap_size);
634 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
635 }
636
637 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
638 {
639 struct ieee80211_local *local = sdata->local;
640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
641 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
642 struct sk_buff *skb;
643 struct ieee80211_mgmt *mgmt;
644 u8 *pos, qos_info, *ie_start;
645 size_t offset = 0, noffset;
646 int i, count, rates_len, supp_rates_len, shift;
647 u16 capab;
648 struct ieee80211_supported_band *sband;
649 struct ieee80211_chanctx_conf *chanctx_conf;
650 struct ieee80211_channel *chan;
651 u32 rates = 0;
652
653 sdata_assert_lock(sdata);
654
655 rcu_read_lock();
656 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
657 if (WARN_ON(!chanctx_conf)) {
658 rcu_read_unlock();
659 return;
660 }
661 chan = chanctx_conf->def.chan;
662 rcu_read_unlock();
663 sband = local->hw.wiphy->bands[chan->band];
664 shift = ieee80211_vif_get_shift(&sdata->vif);
665
666 if (assoc_data->supp_rates_len) {
667 /*
668 * Get all rates supported by the device and the AP as
669 * some APs don't like getting a superset of their rates
670 * in the association request (e.g. D-Link DAP 1353 in
671 * b-only mode)...
672 */
673 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
674 assoc_data->supp_rates,
675 assoc_data->supp_rates_len,
676 &rates);
677 } else {
678 /*
679 * In case AP not provide any supported rates information
680 * before association, we send information element(s) with
681 * all rates that we support.
682 */
683 rates_len = 0;
684 for (i = 0; i < sband->n_bitrates; i++) {
685 rates |= BIT(i);
686 rates_len++;
687 }
688 }
689
690 skb = alloc_skb(local->hw.extra_tx_headroom +
691 sizeof(*mgmt) + /* bit too much but doesn't matter */
692 2 + assoc_data->ssid_len + /* SSID */
693 4 + rates_len + /* (extended) rates */
694 4 + /* power capability */
695 2 + 2 * sband->n_channels + /* supported channels */
696 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
697 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
698 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
699 sizeof(struct ieee80211_he_mcs_nss_supp) +
700 IEEE80211_HE_PPE_THRES_MAX_LEN +
701 assoc_data->ie_len + /* extra IEs */
702 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
703 9, /* WMM */
704 GFP_KERNEL);
705 if (!skb)
706 return;
707
708 skb_reserve(skb, local->hw.extra_tx_headroom);
709
710 capab = WLAN_CAPABILITY_ESS;
711
712 if (sband->band == NL80211_BAND_2GHZ) {
713 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
714 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
715 }
716
717 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
718 capab |= WLAN_CAPABILITY_PRIVACY;
719
720 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
721 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
722 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
723
724 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
725 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
726
727 mgmt = skb_put_zero(skb, 24);
728 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
729 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
730 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
731
732 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
733 skb_put(skb, 10);
734 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
735 IEEE80211_STYPE_REASSOC_REQ);
736 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
737 mgmt->u.reassoc_req.listen_interval =
738 cpu_to_le16(local->hw.conf.listen_interval);
739 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
740 ETH_ALEN);
741 } else {
742 skb_put(skb, 4);
743 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
744 IEEE80211_STYPE_ASSOC_REQ);
745 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
746 mgmt->u.assoc_req.listen_interval =
747 cpu_to_le16(local->hw.conf.listen_interval);
748 }
749
750 /* SSID */
751 pos = skb_put(skb, 2 + assoc_data->ssid_len);
752 ie_start = pos;
753 *pos++ = WLAN_EID_SSID;
754 *pos++ = assoc_data->ssid_len;
755 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
756
757 /* add all rates which were marked to be used above */
758 supp_rates_len = rates_len;
759 if (supp_rates_len > 8)
760 supp_rates_len = 8;
761
762 pos = skb_put(skb, supp_rates_len + 2);
763 *pos++ = WLAN_EID_SUPP_RATES;
764 *pos++ = supp_rates_len;
765
766 count = 0;
767 for (i = 0; i < sband->n_bitrates; i++) {
768 if (BIT(i) & rates) {
769 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
770 5 * (1 << shift));
771 *pos++ = (u8) rate;
772 if (++count == 8)
773 break;
774 }
775 }
776
777 if (rates_len > count) {
778 pos = skb_put(skb, rates_len - count + 2);
779 *pos++ = WLAN_EID_EXT_SUPP_RATES;
780 *pos++ = rates_len - count;
781
782 for (i++; i < sband->n_bitrates; i++) {
783 if (BIT(i) & rates) {
784 int rate;
785 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
786 5 * (1 << shift));
787 *pos++ = (u8) rate;
788 }
789 }
790 }
791
792 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
793 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
794 pos = skb_put(skb, 4);
795 *pos++ = WLAN_EID_PWR_CAPABILITY;
796 *pos++ = 2;
797 *pos++ = 0; /* min tx power */
798 /* max tx power */
799 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
800 }
801
802 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
803 /* TODO: get this in reg domain format */
804 pos = skb_put(skb, 2 * sband->n_channels + 2);
805 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
806 *pos++ = 2 * sband->n_channels;
807 for (i = 0; i < sband->n_channels; i++) {
808 *pos++ = ieee80211_frequency_to_channel(
809 sband->channels[i].center_freq);
810 *pos++ = 1; /* one channel in the subband*/
811 }
812 }
813
814 /* Set MBSSID support for HE AP if needed */
815 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
816 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) {
817 struct element *elem;
818
819 /* we know it's writable, cast away the const */
820 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
821 assoc_data->ie,
822 assoc_data->ie_len);
823
824 /* We can probably assume both always true */
825 if (elem && elem->datalen >= 3)
826 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
827 }
828
829 /* if present, add any custom IEs that go before HT */
830 if (assoc_data->ie_len) {
831 static const u8 before_ht[] = {
832 WLAN_EID_SSID,
833 WLAN_EID_SUPP_RATES,
834 WLAN_EID_EXT_SUPP_RATES,
835 WLAN_EID_PWR_CAPABILITY,
836 WLAN_EID_SUPPORTED_CHANNELS,
837 WLAN_EID_RSN,
838 WLAN_EID_QOS_CAPA,
839 WLAN_EID_RRM_ENABLED_CAPABILITIES,
840 WLAN_EID_MOBILITY_DOMAIN,
841 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
842 WLAN_EID_RIC_DATA, /* reassoc only */
843 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
844 };
845 static const u8 after_ric[] = {
846 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
847 WLAN_EID_HT_CAPABILITY,
848 WLAN_EID_BSS_COEX_2040,
849 /* luckily this is almost always there */
850 WLAN_EID_EXT_CAPABILITY,
851 WLAN_EID_QOS_TRAFFIC_CAPA,
852 WLAN_EID_TIM_BCAST_REQ,
853 WLAN_EID_INTERWORKING,
854 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
855 WLAN_EID_VHT_CAPABILITY,
856 WLAN_EID_OPMODE_NOTIF,
857 };
858
859 noffset = ieee80211_ie_split_ric(assoc_data->ie,
860 assoc_data->ie_len,
861 before_ht,
862 ARRAY_SIZE(before_ht),
863 after_ric,
864 ARRAY_SIZE(after_ric),
865 offset);
866 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
867 offset = noffset;
868 }
869
870 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
871 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
872 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
873
874 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
875 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
876 sband, chan, sdata->smps_mode);
877
878 /* if present, add any custom IEs that go before VHT */
879 if (assoc_data->ie_len) {
880 static const u8 before_vht[] = {
881 /*
882 * no need to list the ones split off before HT
883 * or generated here
884 */
885 WLAN_EID_BSS_COEX_2040,
886 WLAN_EID_EXT_CAPABILITY,
887 WLAN_EID_QOS_TRAFFIC_CAPA,
888 WLAN_EID_TIM_BCAST_REQ,
889 WLAN_EID_INTERWORKING,
890 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
891 };
892
893 /* RIC already taken above, so no need to handle here anymore */
894 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
895 before_vht, ARRAY_SIZE(before_vht),
896 offset);
897 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
898 offset = noffset;
899 }
900
901 /* if present, add any custom IEs that go before HE */
902 if (assoc_data->ie_len) {
903 static const u8 before_he[] = {
904 /*
905 * no need to list the ones split off before VHT
906 * or generated here
907 */
908 WLAN_EID_OPMODE_NOTIF,
909 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
910 /* 11ai elements */
911 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
916 /* TODO: add 11ah/11aj/11ak elements */
917 };
918
919 /* RIC already taken above, so no need to handle here anymore */
920 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
921 before_he, ARRAY_SIZE(before_he),
922 offset);
923 pos = skb_put(skb, noffset - offset);
924 memcpy(pos, assoc_data->ie + offset, noffset - offset);
925 offset = noffset;
926 }
927
928 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
929 ieee80211_add_vht_ie(sdata, skb, sband,
930 &assoc_data->ap_vht_cap);
931
932 /*
933 * If AP doesn't support HT, mark HE as disabled.
934 * If on the 5GHz band, make sure it supports VHT.
935 */
936 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
937 (sband->band == NL80211_BAND_5GHZ &&
938 ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
939 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
940
941 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
942 ieee80211_add_he_ie(sdata, skb, sband);
943
944 /* if present, add any custom non-vendor IEs that go after HE */
945 if (assoc_data->ie_len) {
946 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
947 assoc_data->ie_len,
948 offset);
949 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
950 offset = noffset;
951 }
952
953 if (assoc_data->wmm) {
954 if (assoc_data->uapsd) {
955 qos_info = ifmgd->uapsd_queues;
956 qos_info |= (ifmgd->uapsd_max_sp_len <<
957 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
958 } else {
959 qos_info = 0;
960 }
961
962 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
963 }
964
965 /* add any remaining custom (i.e. vendor specific here) IEs */
966 if (assoc_data->ie_len) {
967 noffset = assoc_data->ie_len;
968 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
969 }
970
971 if (assoc_data->fils_kek_len &&
972 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
973 dev_kfree_skb(skb);
974 return;
975 }
976
977 pos = skb_tail_pointer(skb);
978 kfree(ifmgd->assoc_req_ies);
979 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
980 ifmgd->assoc_req_ies_len = pos - ie_start;
981
982 drv_mgd_prepare_tx(local, sdata, 0);
983
984 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
985 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
986 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
987 IEEE80211_TX_INTFL_MLME_CONN_TX;
988 ieee80211_tx_skb(sdata, skb);
989 }
990
991 void ieee80211_send_pspoll(struct ieee80211_local *local,
992 struct ieee80211_sub_if_data *sdata)
993 {
994 struct ieee80211_pspoll *pspoll;
995 struct sk_buff *skb;
996
997 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
998 if (!skb)
999 return;
1000
1001 pspoll = (struct ieee80211_pspoll *) skb->data;
1002 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1003
1004 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1005 ieee80211_tx_skb(sdata, skb);
1006 }
1007
1008 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1009 struct ieee80211_sub_if_data *sdata,
1010 bool powersave)
1011 {
1012 struct sk_buff *skb;
1013 struct ieee80211_hdr_3addr *nullfunc;
1014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1015
1016 /* Don't send NDPs when STA is connected HE */
1017 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1018 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
1019 return;
1020
1021 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
1022 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
1023 if (!skb)
1024 return;
1025
1026 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1027 if (powersave)
1028 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1029
1030 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1031 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1032
1033 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1034 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1035
1036 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1038
1039 ieee80211_tx_skb(sdata, skb);
1040 }
1041
1042 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1043 struct ieee80211_sub_if_data *sdata)
1044 {
1045 struct sk_buff *skb;
1046 struct ieee80211_hdr *nullfunc;
1047 __le16 fc;
1048
1049 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1050 return;
1051
1052 /* Don't send NDPs when connected HE */
1053 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1054 return;
1055
1056 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1057 if (!skb)
1058 return;
1059
1060 skb_reserve(skb, local->hw.extra_tx_headroom);
1061
1062 nullfunc = skb_put_zero(skb, 30);
1063 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1064 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1065 nullfunc->frame_control = fc;
1066 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
1067 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1068 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
1069 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1070
1071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1072 ieee80211_tx_skb(sdata, skb);
1073 }
1074
1075 /* spectrum management related things */
1076 static void ieee80211_chswitch_work(struct work_struct *work)
1077 {
1078 struct ieee80211_sub_if_data *sdata =
1079 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
1080 struct ieee80211_local *local = sdata->local;
1081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1082 int ret;
1083
1084 if (!ieee80211_sdata_running(sdata))
1085 return;
1086
1087 sdata_lock(sdata);
1088 mutex_lock(&local->mtx);
1089 mutex_lock(&local->chanctx_mtx);
1090
1091 if (!ifmgd->associated)
1092 goto out;
1093
1094 if (!sdata->vif.csa_active)
1095 goto out;
1096
1097 /*
1098 * using reservation isn't immediate as it may be deferred until later
1099 * with multi-vif. once reservation is complete it will re-schedule the
1100 * work with no reserved_chanctx so verify chandef to check if it
1101 * completed successfully
1102 */
1103
1104 if (sdata->reserved_chanctx) {
1105 struct ieee80211_supported_band *sband = NULL;
1106 struct sta_info *mgd_sta = NULL;
1107 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
1108
1109 /*
1110 * with multi-vif csa driver may call ieee80211_csa_finish()
1111 * many times while waiting for other interfaces to use their
1112 * reservations
1113 */
1114 if (sdata->reserved_ready)
1115 goto out;
1116
1117 if (sdata->vif.bss_conf.chandef.width !=
1118 sdata->csa_chandef.width) {
1119 /*
1120 * For managed interface, we need to also update the AP
1121 * station bandwidth and align the rate scale algorithm
1122 * on the bandwidth change. Here we only consider the
1123 * bandwidth of the new channel definition (as channel
1124 * switch flow does not have the full HT/VHT/HE
1125 * information), assuming that if additional changes are
1126 * required they would be done as part of the processing
1127 * of the next beacon from the AP.
1128 */
1129 switch (sdata->csa_chandef.width) {
1130 case NL80211_CHAN_WIDTH_20_NOHT:
1131 case NL80211_CHAN_WIDTH_20:
1132 default:
1133 bw = IEEE80211_STA_RX_BW_20;
1134 break;
1135 case NL80211_CHAN_WIDTH_40:
1136 bw = IEEE80211_STA_RX_BW_40;
1137 break;
1138 case NL80211_CHAN_WIDTH_80:
1139 bw = IEEE80211_STA_RX_BW_80;
1140 break;
1141 case NL80211_CHAN_WIDTH_80P80:
1142 case NL80211_CHAN_WIDTH_160:
1143 bw = IEEE80211_STA_RX_BW_160;
1144 break;
1145 }
1146
1147 mgd_sta = sta_info_get(sdata, ifmgd->bssid);
1148 sband =
1149 local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
1150 }
1151
1152 if (sdata->vif.bss_conf.chandef.width >
1153 sdata->csa_chandef.width) {
1154 mgd_sta->sta.bandwidth = bw;
1155 rate_control_rate_update(local, sband, mgd_sta,
1156 IEEE80211_RC_BW_CHANGED);
1157 }
1158
1159 ret = ieee80211_vif_use_reserved_context(sdata);
1160 if (ret) {
1161 sdata_info(sdata,
1162 "failed to use reserved channel context, disconnecting (err=%d)\n",
1163 ret);
1164 ieee80211_queue_work(&sdata->local->hw,
1165 &ifmgd->csa_connection_drop_work);
1166 goto out;
1167 }
1168
1169 if (sdata->vif.bss_conf.chandef.width <
1170 sdata->csa_chandef.width) {
1171 mgd_sta->sta.bandwidth = bw;
1172 rate_control_rate_update(local, sband, mgd_sta,
1173 IEEE80211_RC_BW_CHANGED);
1174 }
1175
1176 goto out;
1177 }
1178
1179 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1180 &sdata->csa_chandef)) {
1181 sdata_info(sdata,
1182 "failed to finalize channel switch, disconnecting\n");
1183 ieee80211_queue_work(&sdata->local->hw,
1184 &ifmgd->csa_connection_drop_work);
1185 goto out;
1186 }
1187
1188 ifmgd->csa_waiting_bcn = true;
1189
1190 ieee80211_sta_reset_beacon_monitor(sdata);
1191 ieee80211_sta_reset_conn_monitor(sdata);
1192
1193 out:
1194 mutex_unlock(&local->chanctx_mtx);
1195 mutex_unlock(&local->mtx);
1196 sdata_unlock(sdata);
1197 }
1198
1199 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1200 {
1201 struct ieee80211_local *local = sdata->local;
1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1203 int ret;
1204
1205 sdata_assert_lock(sdata);
1206
1207 WARN_ON(!sdata->vif.csa_active);
1208
1209 if (sdata->csa_block_tx) {
1210 ieee80211_wake_vif_queues(local, sdata,
1211 IEEE80211_QUEUE_STOP_REASON_CSA);
1212 sdata->csa_block_tx = false;
1213 }
1214
1215 sdata->vif.csa_active = false;
1216 ifmgd->csa_waiting_bcn = false;
1217
1218 ret = drv_post_channel_switch(sdata);
1219 if (ret) {
1220 sdata_info(sdata,
1221 "driver post channel switch failed, disconnecting\n");
1222 ieee80211_queue_work(&local->hw,
1223 &ifmgd->csa_connection_drop_work);
1224 return;
1225 }
1226
1227 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1228 }
1229
1230 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1231 {
1232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1234
1235 trace_api_chswitch_done(sdata, success);
1236 if (!success) {
1237 sdata_info(sdata,
1238 "driver channel switch failed, disconnecting\n");
1239 ieee80211_queue_work(&sdata->local->hw,
1240 &ifmgd->csa_connection_drop_work);
1241 } else {
1242 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1243 }
1244 }
1245 EXPORT_SYMBOL(ieee80211_chswitch_done);
1246
1247 static void ieee80211_chswitch_timer(struct timer_list *t)
1248 {
1249 struct ieee80211_sub_if_data *sdata =
1250 from_timer(sdata, t, u.mgd.chswitch_timer);
1251
1252 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1253 }
1254
1255 static void
1256 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata)
1257 {
1258 struct ieee80211_local *local = sdata->local;
1259
1260 if (!local->ops->abort_channel_switch)
1261 return;
1262
1263 mutex_lock(&local->mtx);
1264
1265 mutex_lock(&local->chanctx_mtx);
1266 ieee80211_vif_unreserve_chanctx(sdata);
1267 mutex_unlock(&local->chanctx_mtx);
1268
1269 if (sdata->csa_block_tx)
1270 ieee80211_wake_vif_queues(local, sdata,
1271 IEEE80211_QUEUE_STOP_REASON_CSA);
1272
1273 sdata->csa_block_tx = false;
1274 sdata->vif.csa_active = false;
1275
1276 mutex_unlock(&local->mtx);
1277
1278 drv_abort_channel_switch(sdata);
1279 }
1280
1281 static void
1282 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1283 u64 timestamp, u32 device_timestamp,
1284 struct ieee802_11_elems *elems,
1285 bool beacon)
1286 {
1287 struct ieee80211_local *local = sdata->local;
1288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1289 struct cfg80211_bss *cbss = ifmgd->associated;
1290 struct ieee80211_chanctx_conf *conf;
1291 struct ieee80211_chanctx *chanctx;
1292 enum nl80211_band current_band;
1293 struct ieee80211_csa_ie csa_ie;
1294 struct ieee80211_channel_switch ch_switch;
1295 int res;
1296
1297 sdata_assert_lock(sdata);
1298
1299 if (!cbss)
1300 return;
1301
1302 if (local->scanning)
1303 return;
1304
1305 current_band = cbss->channel->band;
1306 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1307 ifmgd->flags,
1308 ifmgd->associated->bssid, &csa_ie);
1309
1310 if (!res) {
1311 ch_switch.timestamp = timestamp;
1312 ch_switch.device_timestamp = device_timestamp;
1313 ch_switch.block_tx = beacon ? csa_ie.mode : 0;
1314 ch_switch.chandef = csa_ie.chandef;
1315 ch_switch.count = csa_ie.count;
1316 ch_switch.delay = csa_ie.max_switch_time;
1317 }
1318
1319 if (res < 0) {
1320 ieee80211_queue_work(&local->hw,
1321 &ifmgd->csa_connection_drop_work);
1322 return;
1323 }
1324
1325 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
1326 if (res)
1327 ieee80211_sta_abort_chanswitch(sdata);
1328 else
1329 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1330 return;
1331 } else if (sdata->vif.csa_active || res) {
1332 /* disregard subsequent announcements if already processing */
1333 return;
1334 }
1335
1336 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1337 IEEE80211_CHAN_DISABLED)) {
1338 sdata_info(sdata,
1339 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1340 ifmgd->associated->bssid,
1341 csa_ie.chandef.chan->center_freq,
1342 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1343 csa_ie.chandef.center_freq2);
1344 ieee80211_queue_work(&local->hw,
1345 &ifmgd->csa_connection_drop_work);
1346 return;
1347 }
1348
1349 if (cfg80211_chandef_identical(&csa_ie.chandef,
1350 &sdata->vif.bss_conf.chandef) &&
1351 (!csa_ie.mode || !beacon)) {
1352 if (ifmgd->csa_ignored_same_chan)
1353 return;
1354 sdata_info(sdata,
1355 "AP %pM tries to chanswitch to same channel, ignore\n",
1356 ifmgd->associated->bssid);
1357 ifmgd->csa_ignored_same_chan = true;
1358 return;
1359 }
1360
1361 /*
1362 * Drop all TDLS peers - either we disconnect or move to a different
1363 * channel from this point on. There's no telling what our peer will do.
1364 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1365 * have an incompatible wider chandef.
1366 */
1367 ieee80211_teardown_tdls_peers(sdata);
1368
1369 mutex_lock(&local->mtx);
1370 mutex_lock(&local->chanctx_mtx);
1371 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1372 lockdep_is_held(&local->chanctx_mtx));
1373 if (!conf) {
1374 sdata_info(sdata,
1375 "no channel context assigned to vif?, disconnecting\n");
1376 goto drop_connection;
1377 }
1378
1379 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1380
1381 if (local->use_chanctx &&
1382 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1383 sdata_info(sdata,
1384 "driver doesn't support chan-switch with channel contexts\n");
1385 goto drop_connection;
1386 }
1387
1388 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1389 sdata_info(sdata,
1390 "preparing for channel switch failed, disconnecting\n");
1391 goto drop_connection;
1392 }
1393
1394 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1395 chanctx->mode, false);
1396 if (res) {
1397 sdata_info(sdata,
1398 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1399 res);
1400 goto drop_connection;
1401 }
1402 mutex_unlock(&local->chanctx_mtx);
1403
1404 sdata->vif.csa_active = true;
1405 sdata->csa_chandef = csa_ie.chandef;
1406 sdata->csa_block_tx = ch_switch.block_tx;
1407 ifmgd->csa_ignored_same_chan = false;
1408
1409 if (sdata->csa_block_tx)
1410 ieee80211_stop_vif_queues(local, sdata,
1411 IEEE80211_QUEUE_STOP_REASON_CSA);
1412 mutex_unlock(&local->mtx);
1413
1414 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1415 csa_ie.count);
1416
1417 if (local->ops->channel_switch) {
1418 /* use driver's channel switch callback */
1419 drv_channel_switch(local, sdata, &ch_switch);
1420 return;
1421 }
1422
1423 /* channel switch handled in software */
1424 if (csa_ie.count <= 1)
1425 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1426 else
1427 mod_timer(&ifmgd->chswitch_timer,
1428 TU_TO_EXP_TIME((csa_ie.count - 1) *
1429 cbss->beacon_interval));
1430 return;
1431 drop_connection:
1432 /*
1433 * This is just so that the disconnect flow will know that
1434 * we were trying to switch channel and failed. In case the
1435 * mode is 1 (we are not allowed to Tx), we will know not to
1436 * send a deauthentication frame. Those two fields will be
1437 * reset when the disconnection worker runs.
1438 */
1439 sdata->vif.csa_active = true;
1440 sdata->csa_block_tx = ch_switch.block_tx;
1441
1442 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1443 mutex_unlock(&local->chanctx_mtx);
1444 mutex_unlock(&local->mtx);
1445 }
1446
1447 static bool
1448 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1449 struct ieee80211_channel *channel,
1450 const u8 *country_ie, u8 country_ie_len,
1451 const u8 *pwr_constr_elem,
1452 int *chan_pwr, int *pwr_reduction)
1453 {
1454 struct ieee80211_country_ie_triplet *triplet;
1455 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1456 int i, chan_increment;
1457 bool have_chan_pwr = false;
1458
1459 /* Invalid IE */
1460 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1461 return false;
1462
1463 triplet = (void *)(country_ie + 3);
1464 country_ie_len -= 3;
1465
1466 switch (channel->band) {
1467 default:
1468 WARN_ON_ONCE(1);
1469 /* fall through */
1470 case NL80211_BAND_2GHZ:
1471 case NL80211_BAND_60GHZ:
1472 chan_increment = 1;
1473 break;
1474 case NL80211_BAND_5GHZ:
1475 chan_increment = 4;
1476 break;
1477 }
1478
1479 /* find channel */
1480 while (country_ie_len >= 3) {
1481 u8 first_channel = triplet->chans.first_channel;
1482
1483 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1484 goto next;
1485
1486 for (i = 0; i < triplet->chans.num_channels; i++) {
1487 if (first_channel + i * chan_increment == chan) {
1488 have_chan_pwr = true;
1489 *chan_pwr = triplet->chans.max_power;
1490 break;
1491 }
1492 }
1493 if (have_chan_pwr)
1494 break;
1495
1496 next:
1497 triplet++;
1498 country_ie_len -= 3;
1499 }
1500
1501 if (have_chan_pwr && pwr_constr_elem)
1502 *pwr_reduction = *pwr_constr_elem;
1503 else
1504 *pwr_reduction = 0;
1505
1506 return have_chan_pwr;
1507 }
1508
1509 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1510 struct ieee80211_channel *channel,
1511 const u8 *cisco_dtpc_ie,
1512 int *pwr_level)
1513 {
1514 /* From practical testing, the first data byte of the DTPC element
1515 * seems to contain the requested dBm level, and the CLI on Cisco
1516 * APs clearly state the range is -127 to 127 dBm, which indicates
1517 * a signed byte, although it seemingly never actually goes negative.
1518 * The other byte seems to always be zero.
1519 */
1520 *pwr_level = (__s8)cisco_dtpc_ie[4];
1521 }
1522
1523 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1524 struct ieee80211_channel *channel,
1525 struct ieee80211_mgmt *mgmt,
1526 const u8 *country_ie, u8 country_ie_len,
1527 const u8 *pwr_constr_ie,
1528 const u8 *cisco_dtpc_ie)
1529 {
1530 bool has_80211h_pwr = false, has_cisco_pwr = false;
1531 int chan_pwr = 0, pwr_reduction_80211h = 0;
1532 int pwr_level_cisco, pwr_level_80211h;
1533 int new_ap_level;
1534 __le16 capab = mgmt->u.probe_resp.capab_info;
1535
1536 if (country_ie &&
1537 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1538 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1539 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1540 sdata, channel, country_ie, country_ie_len,
1541 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1542 pwr_level_80211h =
1543 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1544 }
1545
1546 if (cisco_dtpc_ie) {
1547 ieee80211_find_cisco_dtpc(
1548 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1549 has_cisco_pwr = true;
1550 }
1551
1552 if (!has_80211h_pwr && !has_cisco_pwr)
1553 return 0;
1554
1555 /* If we have both 802.11h and Cisco DTPC, apply both limits
1556 * by picking the smallest of the two power levels advertised.
1557 */
1558 if (has_80211h_pwr &&
1559 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1560 new_ap_level = pwr_level_80211h;
1561
1562 if (sdata->ap_power_level == new_ap_level)
1563 return 0;
1564
1565 sdata_dbg(sdata,
1566 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1567 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1568 sdata->u.mgd.bssid);
1569 } else { /* has_cisco_pwr is always true here. */
1570 new_ap_level = pwr_level_cisco;
1571
1572 if (sdata->ap_power_level == new_ap_level)
1573 return 0;
1574
1575 sdata_dbg(sdata,
1576 "Limiting TX power to %d dBm as advertised by %pM\n",
1577 pwr_level_cisco, sdata->u.mgd.bssid);
1578 }
1579
1580 sdata->ap_power_level = new_ap_level;
1581 if (__ieee80211_recalc_txpower(sdata))
1582 return BSS_CHANGED_TXPOWER;
1583 return 0;
1584 }
1585
1586 /* powersave */
1587 static void ieee80211_enable_ps(struct ieee80211_local *local,
1588 struct ieee80211_sub_if_data *sdata)
1589 {
1590 struct ieee80211_conf *conf = &local->hw.conf;
1591
1592 /*
1593 * If we are scanning right now then the parameters will
1594 * take effect when scan finishes.
1595 */
1596 if (local->scanning)
1597 return;
1598
1599 if (conf->dynamic_ps_timeout > 0 &&
1600 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(conf->dynamic_ps_timeout));
1603 } else {
1604 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
1605 ieee80211_send_nullfunc(local, sdata, true);
1606
1607 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1608 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1609 return;
1610
1611 conf->flags |= IEEE80211_CONF_PS;
1612 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1613 }
1614 }
1615
1616 static void ieee80211_change_ps(struct ieee80211_local *local)
1617 {
1618 struct ieee80211_conf *conf = &local->hw.conf;
1619
1620 if (local->ps_sdata) {
1621 ieee80211_enable_ps(local, local->ps_sdata);
1622 } else if (conf->flags & IEEE80211_CONF_PS) {
1623 conf->flags &= ~IEEE80211_CONF_PS;
1624 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1625 del_timer_sync(&local->dynamic_ps_timer);
1626 cancel_work_sync(&local->dynamic_ps_enable_work);
1627 }
1628 }
1629
1630 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1631 {
1632 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1633 struct sta_info *sta = NULL;
1634 bool authorized = false;
1635
1636 if (!mgd->powersave)
1637 return false;
1638
1639 if (mgd->broken_ap)
1640 return false;
1641
1642 if (!mgd->associated)
1643 return false;
1644
1645 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1646 return false;
1647
1648 if (!mgd->have_beacon)
1649 return false;
1650
1651 rcu_read_lock();
1652 sta = sta_info_get(sdata, mgd->bssid);
1653 if (sta)
1654 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1655 rcu_read_unlock();
1656
1657 return authorized;
1658 }
1659
1660 /* need to hold RTNL or interface lock */
1661 void ieee80211_recalc_ps(struct ieee80211_local *local)
1662 {
1663 struct ieee80211_sub_if_data *sdata, *found = NULL;
1664 int count = 0;
1665 int timeout;
1666
1667 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
1668 local->ps_sdata = NULL;
1669 return;
1670 }
1671
1672 list_for_each_entry(sdata, &local->interfaces, list) {
1673 if (!ieee80211_sdata_running(sdata))
1674 continue;
1675 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1676 /* If an AP vif is found, then disable PS
1677 * by setting the count to zero thereby setting
1678 * ps_sdata to NULL.
1679 */
1680 count = 0;
1681 break;
1682 }
1683 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1684 continue;
1685 found = sdata;
1686 count++;
1687 }
1688
1689 if (count == 1 && ieee80211_powersave_allowed(found)) {
1690 u8 dtimper = found->u.mgd.dtim_period;
1691
1692 timeout = local->dynamic_ps_forced_timeout;
1693 if (timeout < 0)
1694 timeout = 100;
1695 local->hw.conf.dynamic_ps_timeout = timeout;
1696
1697 /* If the TIM IE is invalid, pretend the value is 1 */
1698 if (!dtimper)
1699 dtimper = 1;
1700
1701 local->hw.conf.ps_dtim_period = dtimper;
1702 local->ps_sdata = found;
1703 } else {
1704 local->ps_sdata = NULL;
1705 }
1706
1707 ieee80211_change_ps(local);
1708 }
1709
1710 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1711 {
1712 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1713
1714 if (sdata->vif.bss_conf.ps != ps_allowed) {
1715 sdata->vif.bss_conf.ps = ps_allowed;
1716 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1717 }
1718 }
1719
1720 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1721 {
1722 struct ieee80211_local *local =
1723 container_of(work, struct ieee80211_local,
1724 dynamic_ps_disable_work);
1725
1726 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1727 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1728 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1729 }
1730
1731 ieee80211_wake_queues_by_reason(&local->hw,
1732 IEEE80211_MAX_QUEUE_MAP,
1733 IEEE80211_QUEUE_STOP_REASON_PS,
1734 false);
1735 }
1736
1737 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1738 {
1739 struct ieee80211_local *local =
1740 container_of(work, struct ieee80211_local,
1741 dynamic_ps_enable_work);
1742 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1743 struct ieee80211_if_managed *ifmgd;
1744 unsigned long flags;
1745 int q;
1746
1747 /* can only happen when PS was just disabled anyway */
1748 if (!sdata)
1749 return;
1750
1751 ifmgd = &sdata->u.mgd;
1752
1753 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1754 return;
1755
1756 if (local->hw.conf.dynamic_ps_timeout > 0) {
1757 /* don't enter PS if TX frames are pending */
1758 if (drv_tx_frames_pending(local)) {
1759 mod_timer(&local->dynamic_ps_timer, jiffies +
1760 msecs_to_jiffies(
1761 local->hw.conf.dynamic_ps_timeout));
1762 return;
1763 }
1764
1765 /*
1766 * transmission can be stopped by others which leads to
1767 * dynamic_ps_timer expiry. Postpone the ps timer if it
1768 * is not the actual idle state.
1769 */
1770 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1771 for (q = 0; q < local->hw.queues; q++) {
1772 if (local->queue_stop_reasons[q]) {
1773 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1774 flags);
1775 mod_timer(&local->dynamic_ps_timer, jiffies +
1776 msecs_to_jiffies(
1777 local->hw.conf.dynamic_ps_timeout));
1778 return;
1779 }
1780 }
1781 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1782 }
1783
1784 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1785 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1786 if (drv_tx_frames_pending(local)) {
1787 mod_timer(&local->dynamic_ps_timer, jiffies +
1788 msecs_to_jiffies(
1789 local->hw.conf.dynamic_ps_timeout));
1790 } else {
1791 ieee80211_send_nullfunc(local, sdata, true);
1792 /* Flush to get the tx status of nullfunc frame */
1793 ieee80211_flush_queues(local, sdata, false);
1794 }
1795 }
1796
1797 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1798 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
1799 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1800 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1801 local->hw.conf.flags |= IEEE80211_CONF_PS;
1802 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1803 }
1804 }
1805
1806 void ieee80211_dynamic_ps_timer(struct timer_list *t)
1807 {
1808 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
1809
1810 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1811 }
1812
1813 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1814 {
1815 struct delayed_work *delayed_work = to_delayed_work(work);
1816 struct ieee80211_sub_if_data *sdata =
1817 container_of(delayed_work, struct ieee80211_sub_if_data,
1818 dfs_cac_timer_work);
1819 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1820
1821 mutex_lock(&sdata->local->mtx);
1822 if (sdata->wdev.cac_started) {
1823 ieee80211_vif_release_channel(sdata);
1824 cfg80211_cac_event(sdata->dev, &chandef,
1825 NL80211_RADAR_CAC_FINISHED,
1826 GFP_KERNEL);
1827 }
1828 mutex_unlock(&sdata->local->mtx);
1829 }
1830
1831 static bool
1832 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1833 {
1834 struct ieee80211_local *local = sdata->local;
1835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1836 bool ret = false;
1837 int ac;
1838
1839 if (local->hw.queues < IEEE80211_NUM_ACS)
1840 return false;
1841
1842 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1843 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1844 int non_acm_ac;
1845 unsigned long now = jiffies;
1846
1847 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1848 tx_tspec->admitted_time &&
1849 time_after(now, tx_tspec->time_slice_start + HZ)) {
1850 tx_tspec->consumed_tx_time = 0;
1851 tx_tspec->time_slice_start = now;
1852
1853 if (tx_tspec->downgraded)
1854 tx_tspec->action =
1855 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1856 }
1857
1858 switch (tx_tspec->action) {
1859 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1860 /* take the original parameters */
1861 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1862 sdata_err(sdata,
1863 "failed to set TX queue parameters for queue %d\n",
1864 ac);
1865 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1866 tx_tspec->downgraded = false;
1867 ret = true;
1868 break;
1869 case TX_TSPEC_ACTION_DOWNGRADE:
1870 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1871 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1872 ret = true;
1873 break;
1874 }
1875 /* downgrade next lower non-ACM AC */
1876 for (non_acm_ac = ac + 1;
1877 non_acm_ac < IEEE80211_NUM_ACS;
1878 non_acm_ac++)
1879 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1880 break;
1881 /* Usually the loop will result in using BK even if it
1882 * requires admission control, but such a configuration
1883 * makes no sense and we have to transmit somehow - the
1884 * AC selection does the same thing.
1885 * If we started out trying to downgrade from BK, then
1886 * the extra condition here might be needed.
1887 */
1888 if (non_acm_ac >= IEEE80211_NUM_ACS)
1889 non_acm_ac = IEEE80211_AC_BK;
1890 if (drv_conf_tx(local, sdata, ac,
1891 &sdata->tx_conf[non_acm_ac]))
1892 sdata_err(sdata,
1893 "failed to set TX queue parameters for queue %d\n",
1894 ac);
1895 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1896 ret = true;
1897 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1898 tx_tspec->time_slice_start + HZ - now + 1);
1899 break;
1900 case TX_TSPEC_ACTION_NONE:
1901 /* nothing now */
1902 break;
1903 }
1904 }
1905
1906 return ret;
1907 }
1908
1909 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1910 {
1911 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1912 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1913 }
1914
1915 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1916 {
1917 struct ieee80211_sub_if_data *sdata;
1918
1919 sdata = container_of(work, struct ieee80211_sub_if_data,
1920 u.mgd.tx_tspec_wk.work);
1921 ieee80211_sta_handle_tspec_ac_params(sdata);
1922 }
1923
1924 /* MLME */
1925 static bool
1926 ieee80211_sta_wmm_params(struct ieee80211_local *local,
1927 struct ieee80211_sub_if_data *sdata,
1928 const u8 *wmm_param, size_t wmm_param_len,
1929 const struct ieee80211_mu_edca_param_set *mu_edca)
1930 {
1931 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
1932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1933 size_t left;
1934 int count, mu_edca_count, ac;
1935 const u8 *pos;
1936 u8 uapsd_queues = 0;
1937
1938 if (!local->ops->conf_tx)
1939 return false;
1940
1941 if (local->hw.queues < IEEE80211_NUM_ACS)
1942 return false;
1943
1944 if (!wmm_param)
1945 return false;
1946
1947 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1948 return false;
1949
1950 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1951 uapsd_queues = ifmgd->uapsd_queues;
1952
1953 count = wmm_param[6] & 0x0f;
1954 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
1955 * if mu_edca was preset before and now it disappeared tell
1956 * the driver about it.
1957 */
1958 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
1959 if (count == ifmgd->wmm_last_param_set &&
1960 mu_edca_count == ifmgd->mu_edca_last_param_set)
1961 return false;
1962 ifmgd->wmm_last_param_set = count;
1963 ifmgd->mu_edca_last_param_set = mu_edca_count;
1964
1965 pos = wmm_param + 8;
1966 left = wmm_param_len - 8;
1967
1968 memset(&params, 0, sizeof(params));
1969
1970 sdata->wmm_acm = 0;
1971 for (; left >= 4; left -= 4, pos += 4) {
1972 int aci = (pos[0] >> 5) & 0x03;
1973 int acm = (pos[0] >> 4) & 0x01;
1974 bool uapsd = false;
1975
1976 switch (aci) {
1977 case 1: /* AC_BK */
1978 ac = IEEE80211_AC_BK;
1979 if (acm)
1980 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1981 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1982 uapsd = true;
1983 params[ac].mu_edca = !!mu_edca;
1984 if (mu_edca)
1985 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
1986 break;
1987 case 2: /* AC_VI */
1988 ac = IEEE80211_AC_VI;
1989 if (acm)
1990 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1991 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1992 uapsd = true;
1993 params[ac].mu_edca = !!mu_edca;
1994 if (mu_edca)
1995 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
1996 break;
1997 case 3: /* AC_VO */
1998 ac = IEEE80211_AC_VO;
1999 if (acm)
2000 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2001 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2002 uapsd = true;
2003 params[ac].mu_edca = !!mu_edca;
2004 if (mu_edca)
2005 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2006 break;
2007 case 0: /* AC_BE */
2008 default:
2009 ac = IEEE80211_AC_BE;
2010 if (acm)
2011 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2012 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2013 uapsd = true;
2014 params[ac].mu_edca = !!mu_edca;
2015 if (mu_edca)
2016 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2017 break;
2018 }
2019
2020 params[ac].aifs = pos[0] & 0x0f;
2021
2022 if (params[ac].aifs < 2) {
2023 sdata_info(sdata,
2024 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2025 params[ac].aifs, aci);
2026 params[ac].aifs = 2;
2027 }
2028 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2029 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2030 params[ac].txop = get_unaligned_le16(pos + 2);
2031 params[ac].acm = acm;
2032 params[ac].uapsd = uapsd;
2033
2034 if (params[ac].cw_min == 0 ||
2035 params[ac].cw_min > params[ac].cw_max) {
2036 sdata_info(sdata,
2037 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2038 params[ac].cw_min, params[ac].cw_max, aci);
2039 return false;
2040 }
2041 ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
2042 }
2043
2044 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2045 mlme_dbg(sdata,
2046 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2047 ac, params[ac].acm,
2048 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2049 params[ac].txop, params[ac].uapsd,
2050 ifmgd->tx_tspec[ac].downgraded);
2051 sdata->tx_conf[ac] = params[ac];
2052 if (!ifmgd->tx_tspec[ac].downgraded &&
2053 drv_conf_tx(local, sdata, ac, &params[ac]))
2054 sdata_err(sdata,
2055 "failed to set TX queue parameters for AC %d\n",
2056 ac);
2057 }
2058
2059 /* enable WMM or activate new settings */
2060 sdata->vif.bss_conf.qos = true;
2061 return true;
2062 }
2063
2064 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2065 {
2066 lockdep_assert_held(&sdata->local->mtx);
2067
2068 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2069 ieee80211_run_deferred_scan(sdata->local);
2070 }
2071
2072 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2073 {
2074 mutex_lock(&sdata->local->mtx);
2075 __ieee80211_stop_poll(sdata);
2076 mutex_unlock(&sdata->local->mtx);
2077 }
2078
2079 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
2080 u16 capab, bool erp_valid, u8 erp)
2081 {
2082 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2083 struct ieee80211_supported_band *sband;
2084 u32 changed = 0;
2085 bool use_protection;
2086 bool use_short_preamble;
2087 bool use_short_slot;
2088
2089 sband = ieee80211_get_sband(sdata);
2090 if (!sband)
2091 return changed;
2092
2093 if (erp_valid) {
2094 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2095 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2096 } else {
2097 use_protection = false;
2098 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2099 }
2100
2101 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2102 if (sband->band == NL80211_BAND_5GHZ)
2103 use_short_slot = true;
2104
2105 if (use_protection != bss_conf->use_cts_prot) {
2106 bss_conf->use_cts_prot = use_protection;
2107 changed |= BSS_CHANGED_ERP_CTS_PROT;
2108 }
2109
2110 if (use_short_preamble != bss_conf->use_short_preamble) {
2111 bss_conf->use_short_preamble = use_short_preamble;
2112 changed |= BSS_CHANGED_ERP_PREAMBLE;
2113 }
2114
2115 if (use_short_slot != bss_conf->use_short_slot) {
2116 bss_conf->use_short_slot = use_short_slot;
2117 changed |= BSS_CHANGED_ERP_SLOT;
2118 }
2119
2120 return changed;
2121 }
2122
2123 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2124 struct cfg80211_bss *cbss,
2125 u32 bss_info_changed)
2126 {
2127 struct ieee80211_bss *bss = (void *)cbss->priv;
2128 struct ieee80211_local *local = sdata->local;
2129 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2130
2131 bss_info_changed |= BSS_CHANGED_ASSOC;
2132 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
2133 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
2134
2135 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
2136 beacon_loss_count * bss_conf->beacon_int));
2137
2138 sdata->u.mgd.associated = cbss;
2139 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2140
2141 ieee80211_check_rate_mask(sdata);
2142
2143 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
2144
2145 if (sdata->vif.p2p ||
2146 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2147 const struct cfg80211_bss_ies *ies;
2148
2149 rcu_read_lock();
2150 ies = rcu_dereference(cbss->ies);
2151 if (ies) {
2152 int ret;
2153
2154 ret = cfg80211_get_p2p_attr(
2155 ies->data, ies->len,
2156 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2157 (u8 *) &bss_conf->p2p_noa_attr,
2158 sizeof(bss_conf->p2p_noa_attr));
2159 if (ret >= 2) {
2160 sdata->u.mgd.p2p_noa_index =
2161 bss_conf->p2p_noa_attr.index;
2162 bss_info_changed |= BSS_CHANGED_P2P_PS;
2163 }
2164 }
2165 rcu_read_unlock();
2166 }
2167
2168 /* just to be sure */
2169 ieee80211_stop_poll(sdata);
2170
2171 ieee80211_led_assoc(local, 1);
2172
2173 if (sdata->u.mgd.have_beacon) {
2174 /*
2175 * If the AP is buggy we may get here with no DTIM period
2176 * known, so assume it's 1 which is the only safe assumption
2177 * in that case, although if the TIM IE is broken powersave
2178 * probably just won't work at all.
2179 */
2180 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
2181 bss_conf->beacon_rate = bss->beacon_rate;
2182 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
2183 } else {
2184 bss_conf->beacon_rate = NULL;
2185 bss_conf->dtim_period = 0;
2186 }
2187
2188 bss_conf->assoc = 1;
2189
2190 /* Tell the driver to monitor connection quality (if supported) */
2191 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2192 bss_conf->cqm_rssi_thold)
2193 bss_info_changed |= BSS_CHANGED_CQM;
2194
2195 /* Enable ARP filtering */
2196 if (bss_conf->arp_addr_cnt)
2197 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
2198
2199 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
2200
2201 mutex_lock(&local->iflist_mtx);
2202 ieee80211_recalc_ps(local);
2203 mutex_unlock(&local->iflist_mtx);
2204
2205 ieee80211_recalc_smps(sdata);
2206 ieee80211_recalc_ps_vif(sdata);
2207
2208 netif_carrier_on(sdata->dev);
2209 }
2210
2211 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2212 u16 stype, u16 reason, bool tx,
2213 u8 *frame_buf)
2214 {
2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2216 struct ieee80211_local *local = sdata->local;
2217 u32 changed = 0;
2218
2219 sdata_assert_lock(sdata);
2220
2221 if (WARN_ON_ONCE(tx && !frame_buf))
2222 return;
2223
2224 if (WARN_ON(!ifmgd->associated))
2225 return;
2226
2227 ieee80211_stop_poll(sdata);
2228
2229 ifmgd->associated = NULL;
2230 netif_carrier_off(sdata->dev);
2231
2232 /*
2233 * if we want to get out of ps before disassoc (why?) we have
2234 * to do it before sending disassoc, as otherwise the null-packet
2235 * won't be valid.
2236 */
2237 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2238 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2239 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2240 }
2241 local->ps_sdata = NULL;
2242
2243 /* disable per-vif ps */
2244 ieee80211_recalc_ps_vif(sdata);
2245
2246 /* make sure ongoing transmission finishes */
2247 synchronize_net();
2248
2249 /*
2250 * drop any frame before deauth/disassoc, this can be data or
2251 * management frame. Since we are disconnecting, we should not
2252 * insist sending these frames which can take time and delay
2253 * the disconnection and possible the roaming.
2254 */
2255 if (tx)
2256 ieee80211_flush_queues(local, sdata, true);
2257
2258 /* deauthenticate/disassociate now */
2259 if (tx || frame_buf) {
2260 /*
2261 * In multi channel scenarios guarantee that the virtual
2262 * interface is granted immediate airtime to transmit the
2263 * deauthentication frame by calling mgd_prepare_tx, if the
2264 * driver requested so.
2265 */
2266 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2267 !ifmgd->have_beacon)
2268 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2269
2270 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2271 reason, tx, frame_buf);
2272 }
2273
2274 /* flush out frame - make sure the deauth was actually sent */
2275 if (tx)
2276 ieee80211_flush_queues(local, sdata, false);
2277
2278 /* clear bssid only after building the needed mgmt frames */
2279 eth_zero_addr(ifmgd->bssid);
2280
2281 /* remove AP and TDLS peers */
2282 sta_info_flush(sdata);
2283
2284 /* finally reset all BSS / config parameters */
2285 changed |= ieee80211_reset_erp_info(sdata);
2286
2287 ieee80211_led_assoc(local, 0);
2288 changed |= BSS_CHANGED_ASSOC;
2289 sdata->vif.bss_conf.assoc = false;
2290
2291 ifmgd->p2p_noa_index = -1;
2292 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2293 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2294
2295 /* on the next assoc, re-program HT/VHT parameters */
2296 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2297 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2298 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2299 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2300
2301 /* reset MU-MIMO ownership and group data */
2302 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2303 sizeof(sdata->vif.bss_conf.mu_group.membership));
2304 memset(sdata->vif.bss_conf.mu_group.position, 0,
2305 sizeof(sdata->vif.bss_conf.mu_group.position));
2306 changed |= BSS_CHANGED_MU_GROUPS;
2307 sdata->vif.mu_mimo_owner = false;
2308
2309 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2310
2311 del_timer_sync(&local->dynamic_ps_timer);
2312 cancel_work_sync(&local->dynamic_ps_enable_work);
2313
2314 /* Disable ARP filtering */
2315 if (sdata->vif.bss_conf.arp_addr_cnt)
2316 changed |= BSS_CHANGED_ARP_FILTER;
2317
2318 sdata->vif.bss_conf.qos = false;
2319 changed |= BSS_CHANGED_QOS;
2320
2321 /* The BSSID (not really interesting) and HT changed */
2322 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2323 ieee80211_bss_info_change_notify(sdata, changed);
2324
2325 /* disassociated - set to defaults now */
2326 ieee80211_set_wmm_default(sdata, false, false);
2327
2328 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2329 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2330 del_timer_sync(&sdata->u.mgd.timer);
2331 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2332
2333 sdata->vif.bss_conf.dtim_period = 0;
2334 sdata->vif.bss_conf.beacon_rate = NULL;
2335
2336 ifmgd->have_beacon = false;
2337
2338 ifmgd->flags = 0;
2339 mutex_lock(&local->mtx);
2340 ieee80211_vif_release_channel(sdata);
2341
2342 sdata->vif.csa_active = false;
2343 ifmgd->csa_waiting_bcn = false;
2344 ifmgd->csa_ignored_same_chan = false;
2345 if (sdata->csa_block_tx) {
2346 ieee80211_wake_vif_queues(local, sdata,
2347 IEEE80211_QUEUE_STOP_REASON_CSA);
2348 sdata->csa_block_tx = false;
2349 }
2350 mutex_unlock(&local->mtx);
2351
2352 /* existing TX TSPEC sessions no longer exist */
2353 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2354 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2355
2356 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2357 }
2358
2359 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2360 struct ieee80211_hdr *hdr)
2361 {
2362 /*
2363 * We can postpone the mgd.timer whenever receiving unicast frames
2364 * from AP because we know that the connection is working both ways
2365 * at that time. But multicast frames (and hence also beacons) must
2366 * be ignored here, because we need to trigger the timer during
2367 * data idle periods for sending the periodic probe request to the
2368 * AP we're connected to.
2369 */
2370 if (is_multicast_ether_addr(hdr->addr1))
2371 return;
2372
2373 ieee80211_sta_reset_conn_monitor(sdata);
2374 }
2375
2376 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2377 {
2378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2379 struct ieee80211_local *local = sdata->local;
2380
2381 mutex_lock(&local->mtx);
2382 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2383 goto out;
2384
2385 __ieee80211_stop_poll(sdata);
2386
2387 mutex_lock(&local->iflist_mtx);
2388 ieee80211_recalc_ps(local);
2389 mutex_unlock(&local->iflist_mtx);
2390
2391 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
2392 goto out;
2393
2394 /*
2395 * We've received a probe response, but are not sure whether
2396 * we have or will be receiving any beacons or data, so let's
2397 * schedule the timers again, just in case.
2398 */
2399 ieee80211_sta_reset_beacon_monitor(sdata);
2400
2401 mod_timer(&ifmgd->conn_mon_timer,
2402 round_jiffies_up(jiffies +
2403 IEEE80211_CONNECTION_IDLE_TIME));
2404 out:
2405 mutex_unlock(&local->mtx);
2406 }
2407
2408 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2409 struct ieee80211_hdr *hdr,
2410 u16 tx_time)
2411 {
2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413 u16 tid = ieee80211_get_tid(hdr);
2414 int ac = ieee80211_ac_from_tid(tid);
2415 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2416 unsigned long now = jiffies;
2417
2418 if (likely(!tx_tspec->admitted_time))
2419 return;
2420
2421 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2422 tx_tspec->consumed_tx_time = 0;
2423 tx_tspec->time_slice_start = now;
2424
2425 if (tx_tspec->downgraded) {
2426 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2427 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2428 }
2429 }
2430
2431 if (tx_tspec->downgraded)
2432 return;
2433
2434 tx_tspec->consumed_tx_time += tx_time;
2435
2436 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2437 tx_tspec->downgraded = true;
2438 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2439 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2440 }
2441 }
2442
2443 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2444 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2445 {
2446 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2447
2448 if (!ieee80211_is_data(hdr->frame_control))
2449 return;
2450
2451 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2452 sdata->u.mgd.probe_send_count > 0) {
2453 if (ack)
2454 ieee80211_sta_reset_conn_monitor(sdata);
2455 else
2456 sdata->u.mgd.nullfunc_failed = true;
2457 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2458 return;
2459 }
2460
2461 if (ack)
2462 ieee80211_sta_reset_conn_monitor(sdata);
2463 }
2464
2465 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
2466 const u8 *src, const u8 *dst,
2467 const u8 *ssid, size_t ssid_len,
2468 struct ieee80211_channel *channel)
2469 {
2470 struct sk_buff *skb;
2471
2472 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
2473 ssid, ssid_len, NULL, 0,
2474 IEEE80211_PROBE_FLAG_DIRECTED);
2475 if (skb)
2476 ieee80211_tx_skb(sdata, skb);
2477 }
2478
2479 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2480 {
2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482 const u8 *ssid;
2483 u8 *dst = ifmgd->associated->bssid;
2484 u8 unicast_limit = max(1, max_probe_tries - 3);
2485 struct sta_info *sta;
2486
2487 /*
2488 * Try sending broadcast probe requests for the last three
2489 * probe requests after the first ones failed since some
2490 * buggy APs only support broadcast probe requests.
2491 */
2492 if (ifmgd->probe_send_count >= unicast_limit)
2493 dst = NULL;
2494
2495 /*
2496 * When the hardware reports an accurate Tx ACK status, it's
2497 * better to send a nullfunc frame instead of a probe request,
2498 * as it will kick us off the AP quickly if we aren't associated
2499 * anymore. The timeout will be reset if the frame is ACKed by
2500 * the AP.
2501 */
2502 ifmgd->probe_send_count++;
2503
2504 if (dst) {
2505 mutex_lock(&sdata->local->sta_mtx);
2506 sta = sta_info_get(sdata, dst);
2507 if (!WARN_ON(!sta))
2508 ieee80211_check_fast_rx(sta);
2509 mutex_unlock(&sdata->local->sta_mtx);
2510 }
2511
2512 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
2513 ifmgd->nullfunc_failed = false;
2514 ieee80211_send_nullfunc(sdata->local, sdata, false);
2515 } else {
2516 int ssid_len;
2517
2518 rcu_read_lock();
2519 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2520 if (WARN_ON_ONCE(ssid == NULL))
2521 ssid_len = 0;
2522 else
2523 ssid_len = ssid[1];
2524
2525 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
2526 ssid + 2, ssid_len,
2527 ifmgd->associated->channel);
2528 rcu_read_unlock();
2529 }
2530
2531 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2532 run_again(sdata, ifmgd->probe_timeout);
2533 }
2534
2535 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2536 bool beacon)
2537 {
2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2539 bool already = false;
2540
2541 if (!ieee80211_sdata_running(sdata))
2542 return;
2543
2544 sdata_lock(sdata);
2545
2546 if (!ifmgd->associated)
2547 goto out;
2548
2549 mutex_lock(&sdata->local->mtx);
2550
2551 if (sdata->local->tmp_channel || sdata->local->scanning) {
2552 mutex_unlock(&sdata->local->mtx);
2553 goto out;
2554 }
2555
2556 if (beacon) {
2557 mlme_dbg_ratelimited(sdata,
2558 "detected beacon loss from AP (missed %d beacons) - probing\n",
2559 beacon_loss_count);
2560
2561 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2562 }
2563
2564 /*
2565 * The driver/our work has already reported this event or the
2566 * connection monitoring has kicked in and we have already sent
2567 * a probe request. Or maybe the AP died and the driver keeps
2568 * reporting until we disassociate...
2569 *
2570 * In either case we have to ignore the current call to this
2571 * function (except for setting the correct probe reason bit)
2572 * because otherwise we would reset the timer every time and
2573 * never check whether we received a probe response!
2574 */
2575 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2576 already = true;
2577
2578 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2579
2580 mutex_unlock(&sdata->local->mtx);
2581
2582 if (already)
2583 goto out;
2584
2585 mutex_lock(&sdata->local->iflist_mtx);
2586 ieee80211_recalc_ps(sdata->local);
2587 mutex_unlock(&sdata->local->iflist_mtx);
2588
2589 ifmgd->probe_send_count = 0;
2590 ieee80211_mgd_probe_ap_send(sdata);
2591 out:
2592 sdata_unlock(sdata);
2593 }
2594
2595 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2596 struct ieee80211_vif *vif)
2597 {
2598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2600 struct cfg80211_bss *cbss;
2601 struct sk_buff *skb;
2602 const u8 *ssid;
2603 int ssid_len;
2604
2605 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2606 return NULL;
2607
2608 sdata_assert_lock(sdata);
2609
2610 if (ifmgd->associated)
2611 cbss = ifmgd->associated;
2612 else if (ifmgd->auth_data)
2613 cbss = ifmgd->auth_data->bss;
2614 else if (ifmgd->assoc_data)
2615 cbss = ifmgd->assoc_data->bss;
2616 else
2617 return NULL;
2618
2619 rcu_read_lock();
2620 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2621 if (WARN_ON_ONCE(ssid == NULL))
2622 ssid_len = 0;
2623 else
2624 ssid_len = ssid[1];
2625
2626 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2627 (u32) -1, cbss->channel,
2628 ssid + 2, ssid_len,
2629 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
2630 rcu_read_unlock();
2631
2632 return skb;
2633 }
2634 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2635
2636 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2637 const u8 *buf, size_t len, bool tx,
2638 u16 reason)
2639 {
2640 struct ieee80211_event event = {
2641 .type = MLME_EVENT,
2642 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2643 .u.mlme.reason = reason,
2644 };
2645
2646 if (tx)
2647 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2648 else
2649 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2650
2651 drv_event_callback(sdata->local, sdata, &event);
2652 }
2653
2654 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2655 {
2656 struct ieee80211_local *local = sdata->local;
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2659 bool tx;
2660
2661 sdata_lock(sdata);
2662 if (!ifmgd->associated) {
2663 sdata_unlock(sdata);
2664 return;
2665 }
2666
2667 tx = !sdata->csa_block_tx;
2668
2669 /* AP is probably out of range (or not reachable for another reason) so
2670 * remove the bss struct for that AP.
2671 */
2672 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2673
2674 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2676 tx, frame_buf);
2677 mutex_lock(&local->mtx);
2678 sdata->vif.csa_active = false;
2679 ifmgd->csa_waiting_bcn = false;
2680 if (sdata->csa_block_tx) {
2681 ieee80211_wake_vif_queues(local, sdata,
2682 IEEE80211_QUEUE_STOP_REASON_CSA);
2683 sdata->csa_block_tx = false;
2684 }
2685 mutex_unlock(&local->mtx);
2686
2687 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
2688 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2689
2690 sdata_unlock(sdata);
2691 }
2692
2693 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2694 {
2695 struct ieee80211_sub_if_data *sdata =
2696 container_of(work, struct ieee80211_sub_if_data,
2697 u.mgd.beacon_connection_loss_work);
2698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2699
2700 if (ifmgd->associated)
2701 ifmgd->beacon_loss_count++;
2702
2703 if (ifmgd->connection_loss) {
2704 sdata_info(sdata, "Connection to AP %pM lost\n",
2705 ifmgd->bssid);
2706 __ieee80211_disconnect(sdata);
2707 } else {
2708 ieee80211_mgd_probe_ap(sdata, true);
2709 }
2710 }
2711
2712 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2713 {
2714 struct ieee80211_sub_if_data *sdata =
2715 container_of(work, struct ieee80211_sub_if_data,
2716 u.mgd.csa_connection_drop_work);
2717
2718 __ieee80211_disconnect(sdata);
2719 }
2720
2721 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2722 {
2723 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2724 struct ieee80211_hw *hw = &sdata->local->hw;
2725
2726 trace_api_beacon_loss(sdata);
2727
2728 sdata->u.mgd.connection_loss = false;
2729 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2730 }
2731 EXPORT_SYMBOL(ieee80211_beacon_loss);
2732
2733 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2734 {
2735 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2736 struct ieee80211_hw *hw = &sdata->local->hw;
2737
2738 trace_api_connection_loss(sdata);
2739
2740 sdata->u.mgd.connection_loss = true;
2741 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2742 }
2743 EXPORT_SYMBOL(ieee80211_connection_loss);
2744
2745
2746 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2747 bool assoc)
2748 {
2749 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2750
2751 sdata_assert_lock(sdata);
2752
2753 if (!assoc) {
2754 /*
2755 * we are not authenticated yet, the only timer that could be
2756 * running is the timeout for the authentication response which
2757 * which is not relevant anymore.
2758 */
2759 del_timer_sync(&sdata->u.mgd.timer);
2760 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2761
2762 eth_zero_addr(sdata->u.mgd.bssid);
2763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2764 sdata->u.mgd.flags = 0;
2765 mutex_lock(&sdata->local->mtx);
2766 ieee80211_vif_release_channel(sdata);
2767 mutex_unlock(&sdata->local->mtx);
2768 }
2769
2770 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2771 kfree(auth_data);
2772 sdata->u.mgd.auth_data = NULL;
2773 }
2774
2775 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2776 bool assoc, bool abandon)
2777 {
2778 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2779
2780 sdata_assert_lock(sdata);
2781
2782 if (!assoc) {
2783 /*
2784 * we are not associated yet, the only timer that could be
2785 * running is the timeout for the association response which
2786 * which is not relevant anymore.
2787 */
2788 del_timer_sync(&sdata->u.mgd.timer);
2789 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2790
2791 eth_zero_addr(sdata->u.mgd.bssid);
2792 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2793 sdata->u.mgd.flags = 0;
2794 sdata->vif.mu_mimo_owner = false;
2795
2796 mutex_lock(&sdata->local->mtx);
2797 ieee80211_vif_release_channel(sdata);
2798 mutex_unlock(&sdata->local->mtx);
2799
2800 if (abandon)
2801 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
2802 }
2803
2804 kfree(assoc_data);
2805 sdata->u.mgd.assoc_data = NULL;
2806 }
2807
2808 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2809 struct ieee80211_mgmt *mgmt, size_t len)
2810 {
2811 struct ieee80211_local *local = sdata->local;
2812 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2813 u8 *pos;
2814 struct ieee802_11_elems elems;
2815 u32 tx_flags = 0;
2816
2817 pos = mgmt->u.auth.variable;
2818 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
2819 mgmt->bssid, auth_data->bss->bssid);
2820 if (!elems.challenge)
2821 return;
2822 auth_data->expected_transaction = 4;
2823 drv_mgd_prepare_tx(sdata->local, sdata, 0);
2824 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2825 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2826 IEEE80211_TX_INTFL_MLME_CONN_TX;
2827 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2828 elems.challenge - 2, elems.challenge_len + 2,
2829 auth_data->bss->bssid, auth_data->bss->bssid,
2830 auth_data->key, auth_data->key_len,
2831 auth_data->key_idx, tx_flags);
2832 }
2833
2834 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata,
2835 const u8 *bssid)
2836 {
2837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2838 struct sta_info *sta;
2839 bool result = true;
2840
2841 sdata_info(sdata, "authenticated\n");
2842 ifmgd->auth_data->done = true;
2843 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2844 ifmgd->auth_data->timeout_started = true;
2845 run_again(sdata, ifmgd->auth_data->timeout);
2846
2847 /* move station state to auth */
2848 mutex_lock(&sdata->local->sta_mtx);
2849 sta = sta_info_get(sdata, bssid);
2850 if (!sta) {
2851 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2852 result = false;
2853 goto out;
2854 }
2855 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2856 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2857 result = false;
2858 goto out;
2859 }
2860
2861 out:
2862 mutex_unlock(&sdata->local->sta_mtx);
2863 return result;
2864 }
2865
2866 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2867 struct ieee80211_mgmt *mgmt, size_t len)
2868 {
2869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2870 u8 bssid[ETH_ALEN];
2871 u16 auth_alg, auth_transaction, status_code;
2872 struct ieee80211_event event = {
2873 .type = MLME_EVENT,
2874 .u.mlme.data = AUTH_EVENT,
2875 };
2876
2877 sdata_assert_lock(sdata);
2878
2879 if (len < 24 + 6)
2880 return;
2881
2882 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2883 return;
2884
2885 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2886
2887 if (!ether_addr_equal(bssid, mgmt->bssid))
2888 return;
2889
2890 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2891 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2892 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2893
2894 if (auth_alg != ifmgd->auth_data->algorithm ||
2895 (auth_alg != WLAN_AUTH_SAE &&
2896 auth_transaction != ifmgd->auth_data->expected_transaction) ||
2897 (auth_alg == WLAN_AUTH_SAE &&
2898 (auth_transaction < ifmgd->auth_data->expected_transaction ||
2899 auth_transaction > 2))) {
2900 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2901 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2902 auth_transaction,
2903 ifmgd->auth_data->expected_transaction);
2904 return;
2905 }
2906
2907 if (status_code != WLAN_STATUS_SUCCESS) {
2908 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2909 mgmt->sa, status_code);
2910 ieee80211_destroy_auth_data(sdata, false);
2911 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2912 event.u.mlme.status = MLME_DENIED;
2913 event.u.mlme.reason = status_code;
2914 drv_event_callback(sdata->local, sdata, &event);
2915 return;
2916 }
2917
2918 switch (ifmgd->auth_data->algorithm) {
2919 case WLAN_AUTH_OPEN:
2920 case WLAN_AUTH_LEAP:
2921 case WLAN_AUTH_FT:
2922 case WLAN_AUTH_SAE:
2923 case WLAN_AUTH_FILS_SK:
2924 case WLAN_AUTH_FILS_SK_PFS:
2925 case WLAN_AUTH_FILS_PK:
2926 break;
2927 case WLAN_AUTH_SHARED_KEY:
2928 if (ifmgd->auth_data->expected_transaction != 4) {
2929 ieee80211_auth_challenge(sdata, mgmt, len);
2930 /* need another frame */
2931 return;
2932 }
2933 break;
2934 default:
2935 WARN_ONCE(1, "invalid auth alg %d",
2936 ifmgd->auth_data->algorithm);
2937 return;
2938 }
2939
2940 event.u.mlme.status = MLME_SUCCESS;
2941 drv_event_callback(sdata->local, sdata, &event);
2942 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
2943 (auth_transaction == 2 &&
2944 ifmgd->auth_data->expected_transaction == 2)) {
2945 if (!ieee80211_mark_sta_auth(sdata, bssid))
2946 goto out_err;
2947 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2948 auth_transaction == 2) {
2949 sdata_info(sdata, "SAE peer confirmed\n");
2950 ifmgd->auth_data->peer_confirmed = true;
2951 }
2952
2953 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2954 return;
2955 out_err:
2956 mutex_unlock(&sdata->local->sta_mtx);
2957 /* ignore frame -- wait for timeout */
2958 }
2959
2960 #define case_WLAN(type) \
2961 case WLAN_REASON_##type: return #type
2962
2963 const char *ieee80211_get_reason_code_string(u16 reason_code)
2964 {
2965 switch (reason_code) {
2966 case_WLAN(UNSPECIFIED);
2967 case_WLAN(PREV_AUTH_NOT_VALID);
2968 case_WLAN(DEAUTH_LEAVING);
2969 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2970 case_WLAN(DISASSOC_AP_BUSY);
2971 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2972 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2973 case_WLAN(DISASSOC_STA_HAS_LEFT);
2974 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2975 case_WLAN(DISASSOC_BAD_POWER);
2976 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2977 case_WLAN(INVALID_IE);
2978 case_WLAN(MIC_FAILURE);
2979 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2980 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2981 case_WLAN(IE_DIFFERENT);
2982 case_WLAN(INVALID_GROUP_CIPHER);
2983 case_WLAN(INVALID_PAIRWISE_CIPHER);
2984 case_WLAN(INVALID_AKMP);
2985 case_WLAN(UNSUPP_RSN_VERSION);
2986 case_WLAN(INVALID_RSN_IE_CAP);
2987 case_WLAN(IEEE8021X_FAILED);
2988 case_WLAN(CIPHER_SUITE_REJECTED);
2989 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2990 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2991 case_WLAN(DISASSOC_LOW_ACK);
2992 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2993 case_WLAN(QSTA_LEAVE_QBSS);
2994 case_WLAN(QSTA_NOT_USE);
2995 case_WLAN(QSTA_REQUIRE_SETUP);
2996 case_WLAN(QSTA_TIMEOUT);
2997 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2998 case_WLAN(MESH_PEER_CANCELED);
2999 case_WLAN(MESH_MAX_PEERS);
3000 case_WLAN(MESH_CONFIG);
3001 case_WLAN(MESH_CLOSE);
3002 case_WLAN(MESH_MAX_RETRIES);
3003 case_WLAN(MESH_CONFIRM_TIMEOUT);
3004 case_WLAN(MESH_INVALID_GTK);
3005 case_WLAN(MESH_INCONSISTENT_PARAM);
3006 case_WLAN(MESH_INVALID_SECURITY);
3007 case_WLAN(MESH_PATH_ERROR);
3008 case_WLAN(MESH_PATH_NOFORWARD);
3009 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3010 case_WLAN(MAC_EXISTS_IN_MBSS);
3011 case_WLAN(MESH_CHAN_REGULATORY);
3012 case_WLAN(MESH_CHAN);
3013 default: return "<unknown>";
3014 }
3015 }
3016
3017 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3018 struct ieee80211_mgmt *mgmt, size_t len)
3019 {
3020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3021 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3022
3023 sdata_assert_lock(sdata);
3024
3025 if (len < 24 + 2)
3026 return;
3027
3028 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3029 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3030 return;
3031 }
3032
3033 if (ifmgd->associated &&
3034 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
3035 const u8 *bssid = ifmgd->associated->bssid;
3036
3037 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3038 bssid, reason_code,
3039 ieee80211_get_reason_code_string(reason_code));
3040
3041 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3042
3043 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3044 reason_code);
3045 return;
3046 }
3047
3048 if (ifmgd->assoc_data &&
3049 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3050 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
3051
3052 sdata_info(sdata,
3053 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3054 bssid, reason_code,
3055 ieee80211_get_reason_code_string(reason_code));
3056
3057 ieee80211_destroy_assoc_data(sdata, false, true);
3058
3059 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3060 return;
3061 }
3062 }
3063
3064
3065 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3066 struct ieee80211_mgmt *mgmt, size_t len)
3067 {
3068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3069 u16 reason_code;
3070
3071 sdata_assert_lock(sdata);
3072
3073 if (len < 24 + 2)
3074 return;
3075
3076 if (!ifmgd->associated ||
3077 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3078 return;
3079
3080 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3081
3082 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3083 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3084 return;
3085 }
3086
3087 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3088 mgmt->sa, reason_code,
3089 ieee80211_get_reason_code_string(reason_code));
3090
3091 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3092
3093 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
3094 }
3095
3096 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3097 u8 *supp_rates, unsigned int supp_rates_len,
3098 u32 *rates, u32 *basic_rates,
3099 bool *have_higher_than_11mbit,
3100 int *min_rate, int *min_rate_index,
3101 int shift)
3102 {
3103 int i, j;
3104
3105 for (i = 0; i < supp_rates_len; i++) {
3106 int rate = supp_rates[i] & 0x7f;
3107 bool is_basic = !!(supp_rates[i] & 0x80);
3108
3109 if ((rate * 5 * (1 << shift)) > 110)
3110 *have_higher_than_11mbit = true;
3111
3112 /*
3113 * Skip HT and VHT BSS membership selectors since they're not
3114 * rates.
3115 *
3116 * Note: Even though the membership selector and the basic
3117 * rate flag share the same bit, they are not exactly
3118 * the same.
3119 */
3120 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3121 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
3122 continue;
3123
3124 for (j = 0; j < sband->n_bitrates; j++) {
3125 struct ieee80211_rate *br;
3126 int brate;
3127
3128 br = &sband->bitrates[j];
3129
3130 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3131 if (brate == rate) {
3132 *rates |= BIT(j);
3133 if (is_basic)
3134 *basic_rates |= BIT(j);
3135 if ((rate * 5) < *min_rate) {
3136 *min_rate = rate * 5;
3137 *min_rate_index = j;
3138 }
3139 break;
3140 }
3141 }
3142 }
3143 }
3144
3145 static bool ieee80211_twt_req_supported(const struct sta_info *sta,
3146 const struct ieee802_11_elems *elems)
3147 {
3148 if (elems->ext_capab_len < 10)
3149 return false;
3150
3151 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3152 return false;
3153
3154 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] &
3155 IEEE80211_HE_MAC_CAP0_TWT_RES;
3156 }
3157
3158 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
3159 struct cfg80211_bss *cbss,
3160 struct ieee80211_mgmt *mgmt, size_t len)
3161 {
3162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3163 struct ieee80211_local *local = sdata->local;
3164 struct ieee80211_supported_band *sband;
3165 struct sta_info *sta;
3166 u8 *pos;
3167 u16 capab_info, aid;
3168 struct ieee802_11_elems elems;
3169 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3170 const struct cfg80211_bss_ies *bss_ies = NULL;
3171 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3172 u32 changed = 0;
3173 int err;
3174 bool ret;
3175
3176 /* AssocResp and ReassocResp have identical structure */
3177
3178 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3179 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3180
3181 /*
3182 * The 5 MSB of the AID field are reserved
3183 * (802.11-2016 9.4.1.8 AID field)
3184 */
3185 aid &= 0x7ff;
3186
3187 ifmgd->broken_ap = false;
3188
3189 if (aid == 0 || aid > IEEE80211_MAX_AID) {
3190 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
3191 aid);
3192 aid = 0;
3193 ifmgd->broken_ap = true;
3194 }
3195
3196 pos = mgmt->u.assoc_resp.variable;
3197 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3198 mgmt->bssid, assoc_data->bss->bssid);
3199
3200 if (!elems.supp_rates) {
3201 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3202 return false;
3203 }
3204
3205 ifmgd->aid = aid;
3206 ifmgd->tdls_chan_switch_prohibited =
3207 elems.ext_capab && elems.ext_capab_len >= 5 &&
3208 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3209
3210 /*
3211 * Some APs are erroneously not including some information in their
3212 * (re)association response frames. Try to recover by using the data
3213 * from the beacon or probe response. This seems to afflict mobile
3214 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3215 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3216 */
3217 if ((assoc_data->wmm && !elems.wmm_param) ||
3218 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3219 (!elems.ht_cap_elem || !elems.ht_operation)) ||
3220 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3221 (!elems.vht_cap_elem || !elems.vht_operation))) {
3222 const struct cfg80211_bss_ies *ies;
3223 struct ieee802_11_elems bss_elems;
3224
3225 rcu_read_lock();
3226 ies = rcu_dereference(cbss->ies);
3227 if (ies)
3228 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3229 GFP_ATOMIC);
3230 rcu_read_unlock();
3231 if (!bss_ies)
3232 return false;
3233
3234 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
3235 false, &bss_elems,
3236 mgmt->bssid,
3237 assoc_data->bss->bssid);
3238 if (assoc_data->wmm &&
3239 !elems.wmm_param && bss_elems.wmm_param) {
3240 elems.wmm_param = bss_elems.wmm_param;
3241 sdata_info(sdata,
3242 "AP bug: WMM param missing from AssocResp\n");
3243 }
3244
3245 /*
3246 * Also check if we requested HT/VHT, otherwise the AP doesn't
3247 * have to include the IEs in the (re)association response.
3248 */
3249 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
3250 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3251 elems.ht_cap_elem = bss_elems.ht_cap_elem;
3252 sdata_info(sdata,
3253 "AP bug: HT capability missing from AssocResp\n");
3254 }
3255 if (!elems.ht_operation && bss_elems.ht_operation &&
3256 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
3257 elems.ht_operation = bss_elems.ht_operation;
3258 sdata_info(sdata,
3259 "AP bug: HT operation missing from AssocResp\n");
3260 }
3261 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
3262 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3263 elems.vht_cap_elem = bss_elems.vht_cap_elem;
3264 sdata_info(sdata,
3265 "AP bug: VHT capa missing from AssocResp\n");
3266 }
3267 if (!elems.vht_operation && bss_elems.vht_operation &&
3268 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
3269 elems.vht_operation = bss_elems.vht_operation;
3270 sdata_info(sdata,
3271 "AP bug: VHT operation missing from AssocResp\n");
3272 }
3273 }
3274
3275 /*
3276 * We previously checked these in the beacon/probe response, so
3277 * they should be present here. This is just a safety net.
3278 */
3279 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3280 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
3281 sdata_info(sdata,
3282 "HT AP is missing WMM params or HT capability/operation\n");
3283 ret = false;
3284 goto out;
3285 }
3286
3287 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3288 (!elems.vht_cap_elem || !elems.vht_operation)) {
3289 sdata_info(sdata,
3290 "VHT AP is missing VHT capability/operation\n");
3291 ret = false;
3292 goto out;
3293 }
3294
3295 mutex_lock(&sdata->local->sta_mtx);
3296 /*
3297 * station info was already allocated and inserted before
3298 * the association and should be available to us
3299 */
3300 sta = sta_info_get(sdata, cbss->bssid);
3301 if (WARN_ON(!sta)) {
3302 mutex_unlock(&sdata->local->sta_mtx);
3303 ret = false;
3304 goto out;
3305 }
3306
3307 sband = ieee80211_get_sband(sdata);
3308 if (!sband) {
3309 mutex_unlock(&sdata->local->sta_mtx);
3310 ret = false;
3311 goto out;
3312 }
3313
3314 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3315 (!elems.he_cap || !elems.he_operation)) {
3316 mutex_unlock(&sdata->local->sta_mtx);
3317 sdata_info(sdata,
3318 "HE AP is missing HE capability/operation\n");
3319 ret = false;
3320 goto out;
3321 }
3322
3323 /* Set up internal HT/VHT capabilities */
3324 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
3325 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
3326 elems.ht_cap_elem, sta);
3327
3328 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3329 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
3330 elems.vht_cap_elem, sta);
3331
3332 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
3333 elems.he_cap) {
3334 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
3335 elems.he_cap,
3336 elems.he_cap_len,
3337 sta);
3338
3339 bss_conf->he_support = sta->sta.he_cap.has_he;
3340 bss_conf->twt_requester =
3341 ieee80211_twt_req_supported(sta, &elems);
3342 } else {
3343 bss_conf->he_support = false;
3344 bss_conf->twt_requester = false;
3345 }
3346
3347 if (bss_conf->he_support) {
3348 bss_conf->bss_color =
3349 le32_get_bits(elems.he_operation->he_oper_params,
3350 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
3351
3352 bss_conf->htc_trig_based_pkt_ext =
3353 le32_get_bits(elems.he_operation->he_oper_params,
3354 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
3355 bss_conf->frame_time_rts_th =
3356 le32_get_bits(elems.he_operation->he_oper_params,
3357 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3358
3359 bss_conf->multi_sta_back_32bit =
3360 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3361 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP;
3362
3363 bss_conf->ack_enabled =
3364 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] &
3365 IEEE80211_HE_MAC_CAP2_ACK_EN;
3366
3367 bss_conf->uora_exists = !!elems.uora_element;
3368 if (elems.uora_element)
3369 bss_conf->uora_ocw_range = elems.uora_element[0];
3370
3371 /* TODO: OPEN: what happens if BSS color disable is set? */
3372 }
3373
3374 if (cbss->transmitted_bss) {
3375 bss_conf->nontransmitted = true;
3376 ether_addr_copy(bss_conf->transmitter_bssid,
3377 cbss->transmitted_bss->bssid);
3378 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
3379 bss_conf->bssid_index = cbss->bssid_index;
3380 }
3381
3382 /*
3383 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3384 * in their association response, so ignore that data for our own
3385 * configuration. If it changed since the last beacon, we'll get the
3386 * next beacon and update then.
3387 */
3388
3389 /*
3390 * If an operating mode notification IE is present, override the
3391 * NSS calculation (that would be done in rate_control_rate_init())
3392 * and use the # of streams from that element.
3393 */
3394 if (elems.opmode_notif &&
3395 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3396 u8 nss;
3397
3398 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3399 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3400 nss += 1;
3401 sta->sta.rx_nss = nss;
3402 }
3403
3404 rate_control_rate_init(sta);
3405
3406 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3407 set_sta_flag(sta, WLAN_STA_MFP);
3408 sta->sta.mfp = true;
3409 } else {
3410 sta->sta.mfp = false;
3411 }
3412
3413 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3414
3415 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3416 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3417 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3418 if (err) {
3419 sdata_info(sdata,
3420 "failed to move station %pM to desired state\n",
3421 sta->sta.addr);
3422 WARN_ON(__sta_info_destroy(sta));
3423 mutex_unlock(&sdata->local->sta_mtx);
3424 ret = false;
3425 goto out;
3426 }
3427
3428 mutex_unlock(&sdata->local->sta_mtx);
3429
3430 /*
3431 * Always handle WMM once after association regardless
3432 * of the first value the AP uses. Setting -1 here has
3433 * that effect because the AP values is an unsigned
3434 * 4-bit value.
3435 */
3436 ifmgd->wmm_last_param_set = -1;
3437 ifmgd->mu_edca_last_param_set = -1;
3438
3439 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
3440 ieee80211_set_wmm_default(sdata, false, false);
3441 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3442 elems.wmm_param_len,
3443 elems.mu_edca_param_set)) {
3444 /* still enable QoS since we might have HT/VHT */
3445 ieee80211_set_wmm_default(sdata, false, true);
3446 /* set the disable-WMM flag in this case to disable
3447 * tracking WMM parameter changes in the beacon if
3448 * the parameters weren't actually valid. Doing so
3449 * avoids changing parameters very strangely when
3450 * the AP is going back and forth between valid and
3451 * invalid parameters.
3452 */
3453 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3454 }
3455 changed |= BSS_CHANGED_QOS;
3456
3457 if (elems.max_idle_period_ie) {
3458 bss_conf->max_idle_period =
3459 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3460 bss_conf->protected_keep_alive =
3461 !!(elems.max_idle_period_ie->idle_options &
3462 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3463 changed |= BSS_CHANGED_KEEP_ALIVE;
3464 } else {
3465 bss_conf->max_idle_period = 0;
3466 bss_conf->protected_keep_alive = false;
3467 }
3468
3469 /* set AID and assoc capability,
3470 * ieee80211_set_associated() will tell the driver */
3471 bss_conf->aid = aid;
3472 bss_conf->assoc_capability = capab_info;
3473 ieee80211_set_associated(sdata, cbss, changed);
3474
3475 /*
3476 * If we're using 4-addr mode, let the AP know that we're
3477 * doing so, so that it can create the STA VLAN on its side
3478 */
3479 if (ifmgd->use_4addr)
3480 ieee80211_send_4addr_nullfunc(local, sdata);
3481
3482 /*
3483 * Start timer to probe the connection to the AP now.
3484 * Also start the timer that will detect beacon loss.
3485 */
3486 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3487 ieee80211_sta_reset_beacon_monitor(sdata);
3488
3489 ret = true;
3490 out:
3491 kfree(bss_ies);
3492 return ret;
3493 }
3494
3495 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3496 struct ieee80211_mgmt *mgmt,
3497 size_t len)
3498 {
3499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3500 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3501 u16 capab_info, status_code, aid;
3502 struct ieee802_11_elems elems;
3503 int ac, uapsd_queues = -1;
3504 u8 *pos;
3505 bool reassoc;
3506 struct cfg80211_bss *bss;
3507 struct ieee80211_event event = {
3508 .type = MLME_EVENT,
3509 .u.mlme.data = ASSOC_EVENT,
3510 };
3511
3512 sdata_assert_lock(sdata);
3513
3514 if (!assoc_data)
3515 return;
3516 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3517 return;
3518
3519 /*
3520 * AssocResp and ReassocResp have identical structure, so process both
3521 * of them in this function.
3522 */
3523
3524 if (len < 24 + 6)
3525 return;
3526
3527 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
3528 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3529 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3530 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3531
3532 sdata_info(sdata,
3533 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3534 reassoc ? "Rea" : "A", mgmt->sa,
3535 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3536
3537 if (assoc_data->fils_kek_len &&
3538 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3539 return;
3540
3541 pos = mgmt->u.assoc_resp.variable;
3542 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems,
3543 mgmt->bssid, assoc_data->bss->bssid);
3544
3545 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3546 elems.timeout_int &&
3547 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3548 u32 tu, ms;
3549 tu = le32_to_cpu(elems.timeout_int->value);
3550 ms = tu * 1024 / 1000;
3551 sdata_info(sdata,
3552 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3553 mgmt->sa, tu, ms);
3554 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3555 assoc_data->timeout_started = true;
3556 if (ms > IEEE80211_ASSOC_TIMEOUT)
3557 run_again(sdata, assoc_data->timeout);
3558 return;
3559 }
3560
3561 bss = assoc_data->bss;
3562
3563 if (status_code != WLAN_STATUS_SUCCESS) {
3564 sdata_info(sdata, "%pM denied association (code=%d)\n",
3565 mgmt->sa, status_code);
3566 ieee80211_destroy_assoc_data(sdata, false, false);
3567 event.u.mlme.status = MLME_DENIED;
3568 event.u.mlme.reason = status_code;
3569 drv_event_callback(sdata->local, sdata, &event);
3570 } else {
3571 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3572 /* oops -- internal error -- send timeout for now */
3573 ieee80211_destroy_assoc_data(sdata, false, false);
3574 cfg80211_assoc_timeout(sdata->dev, bss);
3575 return;
3576 }
3577 event.u.mlme.status = MLME_SUCCESS;
3578 drv_event_callback(sdata->local, sdata, &event);
3579 sdata_info(sdata, "associated\n");
3580
3581 /*
3582 * destroy assoc_data afterwards, as otherwise an idle
3583 * recalc after assoc_data is NULL but before associated
3584 * is set can cause the interface to go idle
3585 */
3586 ieee80211_destroy_assoc_data(sdata, true, false);
3587
3588 /* get uapsd queues configuration */
3589 uapsd_queues = 0;
3590 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3591 if (sdata->tx_conf[ac].uapsd)
3592 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
3593 }
3594
3595 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues,
3596 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len);
3597 }
3598
3599 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3600 struct ieee80211_mgmt *mgmt, size_t len,
3601 struct ieee80211_rx_status *rx_status)
3602 {
3603 struct ieee80211_local *local = sdata->local;
3604 struct ieee80211_bss *bss;
3605 struct ieee80211_channel *channel;
3606
3607 sdata_assert_lock(sdata);
3608
3609 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3610 if (!channel)
3611 return;
3612
3613 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
3614 if (bss) {
3615 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3616 ieee80211_rx_bss_put(local, bss);
3617 }
3618 }
3619
3620
3621 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3622 struct sk_buff *skb)
3623 {
3624 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3625 struct ieee80211_if_managed *ifmgd;
3626 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3627 size_t baselen, len = skb->len;
3628
3629 ifmgd = &sdata->u.mgd;
3630
3631 sdata_assert_lock(sdata);
3632
3633 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3634 return; /* ignore ProbeResp to foreign address */
3635
3636 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3637 if (baselen > len)
3638 return;
3639
3640 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3641
3642 if (ifmgd->associated &&
3643 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3644 ieee80211_reset_ap_probe(sdata);
3645 }
3646
3647 /*
3648 * This is the canonical list of information elements we care about,
3649 * the filter code also gives us all changes to the Microsoft OUI
3650 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3651 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3652 * changes to requested client power.
3653 *
3654 * We implement beacon filtering in software since that means we can
3655 * avoid processing the frame here and in cfg80211, and userspace
3656 * will not be able to tell whether the hardware supports it or not.
3657 *
3658 * XXX: This list needs to be dynamic -- userspace needs to be able to
3659 * add items it requires. It also needs to be able to tell us to
3660 * look out for other vendor IEs.
3661 */
3662 static const u64 care_about_ies =
3663 (1ULL << WLAN_EID_COUNTRY) |
3664 (1ULL << WLAN_EID_ERP_INFO) |
3665 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3666 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3667 (1ULL << WLAN_EID_HT_CAPABILITY) |
3668 (1ULL << WLAN_EID_HT_OPERATION) |
3669 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3670
3671 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata,
3672 struct ieee80211_if_managed *ifmgd,
3673 struct ieee80211_bss_conf *bss_conf,
3674 struct ieee80211_local *local,
3675 struct ieee80211_rx_status *rx_status)
3676 {
3677 /* Track average RSSI from the Beacon frames of the current AP */
3678
3679 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3680 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3681 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
3682 ifmgd->last_cqm_event_signal = 0;
3683 ifmgd->count_beacon_signal = 1;
3684 ifmgd->last_ave_beacon_signal = 0;
3685 } else {
3686 ifmgd->count_beacon_signal++;
3687 }
3688
3689 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3690
3691 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3692 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3693 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3694 int last_sig = ifmgd->last_ave_beacon_signal;
3695 struct ieee80211_event event = {
3696 .type = RSSI_EVENT,
3697 };
3698
3699 /*
3700 * if signal crosses either of the boundaries, invoke callback
3701 * with appropriate parameters
3702 */
3703 if (sig > ifmgd->rssi_max_thold &&
3704 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3705 ifmgd->last_ave_beacon_signal = sig;
3706 event.u.rssi.data = RSSI_EVENT_HIGH;
3707 drv_event_callback(local, sdata, &event);
3708 } else if (sig < ifmgd->rssi_min_thold &&
3709 (last_sig >= ifmgd->rssi_max_thold ||
3710 last_sig == 0)) {
3711 ifmgd->last_ave_beacon_signal = sig;
3712 event.u.rssi.data = RSSI_EVENT_LOW;
3713 drv_event_callback(local, sdata, &event);
3714 }
3715 }
3716
3717 if (bss_conf->cqm_rssi_thold &&
3718 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3719 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3720 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3721 int last_event = ifmgd->last_cqm_event_signal;
3722 int thold = bss_conf->cqm_rssi_thold;
3723 int hyst = bss_conf->cqm_rssi_hyst;
3724
3725 if (sig < thold &&
3726 (last_event == 0 || sig < last_event - hyst)) {
3727 ifmgd->last_cqm_event_signal = sig;
3728 ieee80211_cqm_rssi_notify(
3729 &sdata->vif,
3730 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3731 sig, GFP_KERNEL);
3732 } else if (sig > thold &&
3733 (last_event == 0 || sig > last_event + hyst)) {
3734 ifmgd->last_cqm_event_signal = sig;
3735 ieee80211_cqm_rssi_notify(
3736 &sdata->vif,
3737 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3738 sig, GFP_KERNEL);
3739 }
3740 }
3741
3742 if (bss_conf->cqm_rssi_low &&
3743 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3744 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3745 int last_event = ifmgd->last_cqm_event_signal;
3746 int low = bss_conf->cqm_rssi_low;
3747 int high = bss_conf->cqm_rssi_high;
3748
3749 if (sig < low &&
3750 (last_event == 0 || last_event >= low)) {
3751 ifmgd->last_cqm_event_signal = sig;
3752 ieee80211_cqm_rssi_notify(
3753 &sdata->vif,
3754 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3755 sig, GFP_KERNEL);
3756 } else if (sig > high &&
3757 (last_event == 0 || last_event <= high)) {
3758 ifmgd->last_cqm_event_signal = sig;
3759 ieee80211_cqm_rssi_notify(
3760 &sdata->vif,
3761 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3762 sig, GFP_KERNEL);
3763 }
3764 }
3765 }
3766
3767 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
3768 struct cfg80211_bss *bss)
3769 {
3770 if (ether_addr_equal(tx_bssid, bss->bssid))
3771 return true;
3772 if (!bss->transmitted_bss)
3773 return false;
3774 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
3775 }
3776
3777 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3778 struct ieee80211_mgmt *mgmt, size_t len,
3779 struct ieee80211_rx_status *rx_status)
3780 {
3781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3782 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3783 size_t baselen;
3784 struct ieee802_11_elems elems;
3785 struct ieee80211_local *local = sdata->local;
3786 struct ieee80211_chanctx_conf *chanctx_conf;
3787 struct ieee80211_channel *chan;
3788 struct sta_info *sta;
3789 u32 changed = 0;
3790 bool erp_valid;
3791 u8 erp_value = 0;
3792 u32 ncrc;
3793 u8 *bssid;
3794 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3795
3796 sdata_assert_lock(sdata);
3797
3798 /* Process beacon from the current BSS */
3799 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3800 if (baselen > len)
3801 return;
3802
3803 rcu_read_lock();
3804 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3805 if (!chanctx_conf) {
3806 rcu_read_unlock();
3807 return;
3808 }
3809
3810 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3811 rcu_read_unlock();
3812 return;
3813 }
3814 chan = chanctx_conf->def.chan;
3815 rcu_read_unlock();
3816
3817 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3818 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) {
3819 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3820 len - baselen, false, &elems,
3821 mgmt->bssid,
3822 ifmgd->assoc_data->bss->bssid);
3823
3824 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3825
3826 if (elems.dtim_period)
3827 ifmgd->dtim_period = elems.dtim_period;
3828 ifmgd->have_beacon = true;
3829 ifmgd->assoc_data->need_beacon = false;
3830 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3831 sdata->vif.bss_conf.sync_tsf =
3832 le64_to_cpu(mgmt->u.beacon.timestamp);
3833 sdata->vif.bss_conf.sync_device_ts =
3834 rx_status->device_timestamp;
3835 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3836 }
3837
3838 if (elems.mbssid_config_ie)
3839 bss_conf->profile_periodicity =
3840 elems.mbssid_config_ie->profile_periodicity;
3841
3842 if (elems.ext_capab_len >= 11 &&
3843 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
3844 bss_conf->ema_ap = true;
3845
3846 /* continue assoc process */
3847 ifmgd->assoc_data->timeout = jiffies;
3848 ifmgd->assoc_data->timeout_started = true;
3849 run_again(sdata, ifmgd->assoc_data->timeout);
3850 return;
3851 }
3852
3853 if (!ifmgd->associated ||
3854 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated))
3855 return;
3856 bssid = ifmgd->associated->bssid;
3857
3858 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
3859 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf,
3860 local, rx_status);
3861
3862 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3863 mlme_dbg_ratelimited(sdata,
3864 "cancelling AP probe due to a received beacon\n");
3865 ieee80211_reset_ap_probe(sdata);
3866 }
3867
3868 /*
3869 * Push the beacon loss detection into the future since
3870 * we are processing a beacon from the AP just now.
3871 */
3872 ieee80211_sta_reset_beacon_monitor(sdata);
3873
3874 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3875 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3876 len - baselen, false, &elems,
3877 care_about_ies, ncrc,
3878 mgmt->bssid, bssid);
3879
3880 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3881 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3882 if (local->hw.conf.dynamic_ps_timeout > 0) {
3883 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3884 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3885 ieee80211_hw_config(local,
3886 IEEE80211_CONF_CHANGE_PS);
3887 }
3888 ieee80211_send_nullfunc(local, sdata, false);
3889 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3890 local->pspolling = true;
3891
3892 /*
3893 * Here is assumed that the driver will be
3894 * able to send ps-poll frame and receive a
3895 * response even though power save mode is
3896 * enabled, but some drivers might require
3897 * to disable power save here. This needs
3898 * to be investigated.
3899 */
3900 ieee80211_send_pspoll(local, sdata);
3901 }
3902 }
3903
3904 if (sdata->vif.p2p ||
3905 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3906 struct ieee80211_p2p_noa_attr noa = {};
3907 int ret;
3908
3909 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3910 len - baselen,
3911 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3912 (u8 *) &noa, sizeof(noa));
3913 if (ret >= 2) {
3914 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3915 /* valid noa_attr and index changed */
3916 sdata->u.mgd.p2p_noa_index = noa.index;
3917 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3918 changed |= BSS_CHANGED_P2P_PS;
3919 /*
3920 * make sure we update all information, the CRC
3921 * mechanism doesn't look at P2P attributes.
3922 */
3923 ifmgd->beacon_crc_valid = false;
3924 }
3925 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3926 /* noa_attr not found and we had valid noa_attr before */
3927 sdata->u.mgd.p2p_noa_index = -1;
3928 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3929 changed |= BSS_CHANGED_P2P_PS;
3930 ifmgd->beacon_crc_valid = false;
3931 }
3932 }
3933
3934 if (ifmgd->csa_waiting_bcn)
3935 ieee80211_chswitch_post_beacon(sdata);
3936
3937 /*
3938 * Update beacon timing and dtim count on every beacon appearance. This
3939 * will allow the driver to use the most updated values. Do it before
3940 * comparing this one with last received beacon.
3941 * IMPORTANT: These parameters would possibly be out of sync by the time
3942 * the driver will use them. The synchronized view is currently
3943 * guaranteed only in certain callbacks.
3944 */
3945 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
3946 sdata->vif.bss_conf.sync_tsf =
3947 le64_to_cpu(mgmt->u.beacon.timestamp);
3948 sdata->vif.bss_conf.sync_device_ts =
3949 rx_status->device_timestamp;
3950 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count;
3951 }
3952
3953 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3954 return;
3955 ifmgd->beacon_crc = ncrc;
3956 ifmgd->beacon_crc_valid = true;
3957
3958 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status);
3959
3960 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3961 rx_status->device_timestamp,
3962 &elems, true);
3963
3964 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3965 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3966 elems.wmm_param_len,
3967 elems.mu_edca_param_set))
3968 changed |= BSS_CHANGED_QOS;
3969
3970 /*
3971 * If we haven't had a beacon before, tell the driver about the
3972 * DTIM period (and beacon timing if desired) now.
3973 */
3974 if (!ifmgd->have_beacon) {
3975 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3976 bss_conf->dtim_period = elems.dtim_period ?: 1;
3977
3978 changed |= BSS_CHANGED_BEACON_INFO;
3979 ifmgd->have_beacon = true;
3980
3981 mutex_lock(&local->iflist_mtx);
3982 ieee80211_recalc_ps(local);
3983 mutex_unlock(&local->iflist_mtx);
3984
3985 ieee80211_recalc_ps_vif(sdata);
3986 }
3987
3988 if (elems.erp_info) {
3989 erp_valid = true;
3990 erp_value = elems.erp_info[0];
3991 } else {
3992 erp_valid = false;
3993 }
3994 changed |= ieee80211_handle_bss_capability(sdata,
3995 le16_to_cpu(mgmt->u.beacon.capab_info),
3996 erp_valid, erp_value);
3997
3998 mutex_lock(&local->sta_mtx);
3999 sta = sta_info_get(sdata, bssid);
4000
4001 if (ieee80211_config_bw(sdata, sta,
4002 elems.ht_cap_elem, elems.ht_operation,
4003 elems.vht_operation, elems.he_operation,
4004 bssid, &changed)) {
4005 mutex_unlock(&local->sta_mtx);
4006 sdata_info(sdata,
4007 "failed to follow AP %pM bandwidth change, disconnect\n",
4008 bssid);
4009 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4010 WLAN_REASON_DEAUTH_LEAVING,
4011 true, deauth_buf);
4012 ieee80211_report_disconnect(sdata, deauth_buf,
4013 sizeof(deauth_buf), true,
4014 WLAN_REASON_DEAUTH_LEAVING);
4015 return;
4016 }
4017
4018 if (sta && elems.opmode_notif)
4019 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
4020 rx_status->band);
4021 mutex_unlock(&local->sta_mtx);
4022
4023 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
4024 elems.country_elem,
4025 elems.country_elem_len,
4026 elems.pwr_constr_elem,
4027 elems.cisco_dtpc_elem);
4028
4029 ieee80211_bss_info_change_notify(sdata, changed);
4030 }
4031
4032 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
4033 struct sk_buff *skb)
4034 {
4035 struct ieee80211_rx_status *rx_status;
4036 struct ieee80211_mgmt *mgmt;
4037 u16 fc;
4038 struct ieee802_11_elems elems;
4039 int ies_len;
4040
4041 rx_status = (struct ieee80211_rx_status *) skb->cb;
4042 mgmt = (struct ieee80211_mgmt *) skb->data;
4043 fc = le16_to_cpu(mgmt->frame_control);
4044
4045 sdata_lock(sdata);
4046
4047 switch (fc & IEEE80211_FCTL_STYPE) {
4048 case IEEE80211_STYPE_BEACON:
4049 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4050 break;
4051 case IEEE80211_STYPE_PROBE_RESP:
4052 ieee80211_rx_mgmt_probe_resp(sdata, skb);
4053 break;
4054 case IEEE80211_STYPE_AUTH:
4055 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
4056 break;
4057 case IEEE80211_STYPE_DEAUTH:
4058 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
4059 break;
4060 case IEEE80211_STYPE_DISASSOC:
4061 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
4062 break;
4063 case IEEE80211_STYPE_ASSOC_RESP:
4064 case IEEE80211_STYPE_REASSOC_RESP:
4065 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
4066 break;
4067 case IEEE80211_STYPE_ACTION:
4068 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
4069 ies_len = skb->len -
4070 offsetof(struct ieee80211_mgmt,
4071 u.action.u.chan_switch.variable);
4072
4073 if (ies_len < 0)
4074 break;
4075
4076 /* CSA IE cannot be overridden, no need for BSSID */
4077 ieee802_11_parse_elems(
4078 mgmt->u.action.u.chan_switch.variable,
4079 ies_len, true, &elems, mgmt->bssid, NULL);
4080
4081 if (elems.parse_error)
4082 break;
4083
4084 ieee80211_sta_process_chanswitch(sdata,
4085 rx_status->mactime,
4086 rx_status->device_timestamp,
4087 &elems, false);
4088 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
4089 ies_len = skb->len -
4090 offsetof(struct ieee80211_mgmt,
4091 u.action.u.ext_chan_switch.variable);
4092
4093 if (ies_len < 0)
4094 break;
4095
4096 /*
4097 * extended CSA IE can't be overridden, no need for
4098 * BSSID
4099 */
4100 ieee802_11_parse_elems(
4101 mgmt->u.action.u.ext_chan_switch.variable,
4102 ies_len, true, &elems, mgmt->bssid, NULL);
4103
4104 if (elems.parse_error)
4105 break;
4106
4107 /* for the handling code pretend this was also an IE */
4108 elems.ext_chansw_ie =
4109 &mgmt->u.action.u.ext_chan_switch.data;
4110
4111 ieee80211_sta_process_chanswitch(sdata,
4112 rx_status->mactime,
4113 rx_status->device_timestamp,
4114 &elems, false);
4115 }
4116 break;
4117 }
4118 sdata_unlock(sdata);
4119 }
4120
4121 static void ieee80211_sta_timer(struct timer_list *t)
4122 {
4123 struct ieee80211_sub_if_data *sdata =
4124 from_timer(sdata, t, u.mgd.timer);
4125
4126 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4127 }
4128
4129 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
4130 u8 *bssid, u8 reason, bool tx)
4131 {
4132 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4133
4134 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
4135 tx, frame_buf);
4136
4137 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4138 reason);
4139 }
4140
4141 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
4142 {
4143 struct ieee80211_local *local = sdata->local;
4144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4145 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
4146 u32 tx_flags = 0;
4147 u16 trans = 1;
4148 u16 status = 0;
4149 u16 prepare_tx_duration = 0;
4150
4151 sdata_assert_lock(sdata);
4152
4153 if (WARN_ON_ONCE(!auth_data))
4154 return -EINVAL;
4155
4156 auth_data->tries++;
4157
4158 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
4159 sdata_info(sdata, "authentication with %pM timed out\n",
4160 auth_data->bss->bssid);
4161
4162 /*
4163 * Most likely AP is not in the range so remove the
4164 * bss struct for that AP.
4165 */
4166 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
4167
4168 return -ETIMEDOUT;
4169 }
4170
4171 if (auth_data->algorithm == WLAN_AUTH_SAE)
4172 prepare_tx_duration =
4173 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
4174
4175 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration);
4176
4177 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
4178 auth_data->bss->bssid, auth_data->tries,
4179 IEEE80211_AUTH_MAX_TRIES);
4180
4181 auth_data->expected_transaction = 2;
4182
4183 if (auth_data->algorithm == WLAN_AUTH_SAE) {
4184 trans = auth_data->sae_trans;
4185 status = auth_data->sae_status;
4186 auth_data->expected_transaction = trans;
4187 }
4188
4189 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4190 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4191 IEEE80211_TX_INTFL_MLME_CONN_TX;
4192
4193 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
4194 auth_data->data, auth_data->data_len,
4195 auth_data->bss->bssid,
4196 auth_data->bss->bssid, NULL, 0, 0,
4197 tx_flags);
4198
4199 if (tx_flags == 0) {
4200 if (auth_data->algorithm == WLAN_AUTH_SAE)
4201 auth_data->timeout = jiffies +
4202 IEEE80211_AUTH_TIMEOUT_SAE;
4203 else
4204 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
4205 } else {
4206 auth_data->timeout =
4207 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
4208 }
4209
4210 auth_data->timeout_started = true;
4211 run_again(sdata, auth_data->timeout);
4212
4213 return 0;
4214 }
4215
4216 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
4217 {
4218 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4219 struct ieee80211_local *local = sdata->local;
4220
4221 sdata_assert_lock(sdata);
4222
4223 assoc_data->tries++;
4224 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
4225 sdata_info(sdata, "association with %pM timed out\n",
4226 assoc_data->bss->bssid);
4227
4228 /*
4229 * Most likely AP is not in the range so remove the
4230 * bss struct for that AP.
4231 */
4232 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
4233
4234 return -ETIMEDOUT;
4235 }
4236
4237 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
4238 assoc_data->bss->bssid, assoc_data->tries,
4239 IEEE80211_ASSOC_MAX_TRIES);
4240 ieee80211_send_assoc(sdata);
4241
4242 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4243 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
4244 assoc_data->timeout_started = true;
4245 run_again(sdata, assoc_data->timeout);
4246 } else {
4247 assoc_data->timeout =
4248 round_jiffies_up(jiffies +
4249 IEEE80211_ASSOC_TIMEOUT_LONG);
4250 assoc_data->timeout_started = true;
4251 run_again(sdata, assoc_data->timeout);
4252 }
4253
4254 return 0;
4255 }
4256
4257 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
4258 __le16 fc, bool acked)
4259 {
4260 struct ieee80211_local *local = sdata->local;
4261
4262 sdata->u.mgd.status_fc = fc;
4263 sdata->u.mgd.status_acked = acked;
4264 sdata->u.mgd.status_received = true;
4265
4266 ieee80211_queue_work(&local->hw, &sdata->work);
4267 }
4268
4269 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
4270 {
4271 struct ieee80211_local *local = sdata->local;
4272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4273
4274 sdata_lock(sdata);
4275
4276 if (ifmgd->status_received) {
4277 __le16 fc = ifmgd->status_fc;
4278 bool status_acked = ifmgd->status_acked;
4279
4280 ifmgd->status_received = false;
4281 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
4282 if (status_acked) {
4283 if (ifmgd->auth_data->algorithm ==
4284 WLAN_AUTH_SAE)
4285 ifmgd->auth_data->timeout =
4286 jiffies +
4287 IEEE80211_AUTH_TIMEOUT_SAE;
4288 else
4289 ifmgd->auth_data->timeout =
4290 jiffies +
4291 IEEE80211_AUTH_TIMEOUT_SHORT;
4292 run_again(sdata, ifmgd->auth_data->timeout);
4293 } else {
4294 ifmgd->auth_data->timeout = jiffies - 1;
4295 }
4296 ifmgd->auth_data->timeout_started = true;
4297 } else if (ifmgd->assoc_data &&
4298 (ieee80211_is_assoc_req(fc) ||
4299 ieee80211_is_reassoc_req(fc))) {
4300 if (status_acked) {
4301 ifmgd->assoc_data->timeout =
4302 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
4303 run_again(sdata, ifmgd->assoc_data->timeout);
4304 } else {
4305 ifmgd->assoc_data->timeout = jiffies - 1;
4306 }
4307 ifmgd->assoc_data->timeout_started = true;
4308 }
4309 }
4310
4311 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
4312 time_after(jiffies, ifmgd->auth_data->timeout)) {
4313 if (ifmgd->auth_data->done) {
4314 /*
4315 * ok ... we waited for assoc but userspace didn't,
4316 * so let's just kill the auth data
4317 */
4318 ieee80211_destroy_auth_data(sdata, false);
4319 } else if (ieee80211_auth(sdata)) {
4320 u8 bssid[ETH_ALEN];
4321 struct ieee80211_event event = {
4322 .type = MLME_EVENT,
4323 .u.mlme.data = AUTH_EVENT,
4324 .u.mlme.status = MLME_TIMEOUT,
4325 };
4326
4327 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
4328
4329 ieee80211_destroy_auth_data(sdata, false);
4330
4331 cfg80211_auth_timeout(sdata->dev, bssid);
4332 drv_event_callback(sdata->local, sdata, &event);
4333 }
4334 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
4335 run_again(sdata, ifmgd->auth_data->timeout);
4336
4337 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
4338 time_after(jiffies, ifmgd->assoc_data->timeout)) {
4339 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
4340 ieee80211_do_assoc(sdata)) {
4341 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4342 struct ieee80211_event event = {
4343 .type = MLME_EVENT,
4344 .u.mlme.data = ASSOC_EVENT,
4345 .u.mlme.status = MLME_TIMEOUT,
4346 };
4347
4348 ieee80211_destroy_assoc_data(sdata, false, false);
4349 cfg80211_assoc_timeout(sdata->dev, bss);
4350 drv_event_callback(sdata->local, sdata, &event);
4351 }
4352 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
4353 run_again(sdata, ifmgd->assoc_data->timeout);
4354
4355 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
4356 ifmgd->associated) {
4357 u8 bssid[ETH_ALEN];
4358 int max_tries;
4359
4360 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4361
4362 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4363 max_tries = max_nullfunc_tries;
4364 else
4365 max_tries = max_probe_tries;
4366
4367 /* ACK received for nullfunc probing frame */
4368 if (!ifmgd->probe_send_count)
4369 ieee80211_reset_ap_probe(sdata);
4370 else if (ifmgd->nullfunc_failed) {
4371 if (ifmgd->probe_send_count < max_tries) {
4372 mlme_dbg(sdata,
4373 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
4374 bssid, ifmgd->probe_send_count,
4375 max_tries);
4376 ieee80211_mgd_probe_ap_send(sdata);
4377 } else {
4378 mlme_dbg(sdata,
4379 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
4380 bssid);
4381 ieee80211_sta_connection_lost(sdata, bssid,
4382 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4383 false);
4384 }
4385 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
4386 run_again(sdata, ifmgd->probe_timeout);
4387 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
4388 mlme_dbg(sdata,
4389 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
4390 bssid, probe_wait_ms);
4391 ieee80211_sta_connection_lost(sdata, bssid,
4392 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4393 } else if (ifmgd->probe_send_count < max_tries) {
4394 mlme_dbg(sdata,
4395 "No probe response from AP %pM after %dms, try %d/%i\n",
4396 bssid, probe_wait_ms,
4397 ifmgd->probe_send_count, max_tries);
4398 ieee80211_mgd_probe_ap_send(sdata);
4399 } else {
4400 /*
4401 * We actually lost the connection ... or did we?
4402 * Let's make sure!
4403 */
4404 mlme_dbg(sdata,
4405 "No probe response from AP %pM after %dms, disconnecting.\n",
4406 bssid, probe_wait_ms);
4407
4408 ieee80211_sta_connection_lost(sdata, bssid,
4409 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
4410 }
4411 }
4412
4413 sdata_unlock(sdata);
4414 }
4415
4416 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
4417 {
4418 struct ieee80211_sub_if_data *sdata =
4419 from_timer(sdata, t, u.mgd.bcn_mon_timer);
4420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4421
4422 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4423 return;
4424
4425 sdata->u.mgd.connection_loss = false;
4426 ieee80211_queue_work(&sdata->local->hw,
4427 &sdata->u.mgd.beacon_connection_loss_work);
4428 }
4429
4430 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
4431 {
4432 struct ieee80211_sub_if_data *sdata =
4433 from_timer(sdata, t, u.mgd.conn_mon_timer);
4434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4435 struct ieee80211_local *local = sdata->local;
4436
4437 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
4438 return;
4439
4440 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
4441 }
4442
4443 static void ieee80211_sta_monitor_work(struct work_struct *work)
4444 {
4445 struct ieee80211_sub_if_data *sdata =
4446 container_of(work, struct ieee80211_sub_if_data,
4447 u.mgd.monitor_work);
4448
4449 ieee80211_mgd_probe_ap(sdata, false);
4450 }
4451
4452 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4453 {
4454 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
4455 __ieee80211_stop_poll(sdata);
4456
4457 /* let's probe the connection once */
4458 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
4459 ieee80211_queue_work(&sdata->local->hw,
4460 &sdata->u.mgd.monitor_work);
4461 }
4462 }
4463
4464 #ifdef CONFIG_PM
4465 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4466 {
4467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4468 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4469
4470 sdata_lock(sdata);
4471
4472 if (ifmgd->auth_data || ifmgd->assoc_data) {
4473 const u8 *bssid = ifmgd->auth_data ?
4474 ifmgd->auth_data->bss->bssid :
4475 ifmgd->assoc_data->bss->bssid;
4476
4477 /*
4478 * If we are trying to authenticate / associate while suspending,
4479 * cfg80211 won't know and won't actually abort those attempts,
4480 * thus we need to do that ourselves.
4481 */
4482 ieee80211_send_deauth_disassoc(sdata, bssid,
4483 IEEE80211_STYPE_DEAUTH,
4484 WLAN_REASON_DEAUTH_LEAVING,
4485 false, frame_buf);
4486 if (ifmgd->assoc_data)
4487 ieee80211_destroy_assoc_data(sdata, false, true);
4488 if (ifmgd->auth_data)
4489 ieee80211_destroy_auth_data(sdata, false);
4490 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4491 IEEE80211_DEAUTH_FRAME_LEN);
4492 }
4493
4494 /* This is a bit of a hack - we should find a better and more generic
4495 * solution to this. Normally when suspending, cfg80211 will in fact
4496 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4497 * auth (not so important) or assoc (this is the problem) process.
4498 *
4499 * As a consequence, it can happen that we are in the process of both
4500 * associating and suspending, and receive an association response
4501 * after cfg80211 has checked if it needs to disconnect, but before
4502 * we actually set the flag to drop incoming frames. This will then
4503 * cause the workqueue flush to process the association response in
4504 * the suspend, resulting in a successful association just before it
4505 * tries to remove the interface from the driver, which now though
4506 * has a channel context assigned ... this results in issues.
4507 *
4508 * To work around this (for now) simply deauth here again if we're
4509 * now connected.
4510 */
4511 if (ifmgd->associated && !sdata->local->wowlan) {
4512 u8 bssid[ETH_ALEN];
4513 struct cfg80211_deauth_request req = {
4514 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4515 .bssid = bssid,
4516 };
4517
4518 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4519 ieee80211_mgd_deauth(sdata, &req);
4520 }
4521
4522 sdata_unlock(sdata);
4523 }
4524
4525 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4526 {
4527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4528
4529 sdata_lock(sdata);
4530 if (!ifmgd->associated) {
4531 sdata_unlock(sdata);
4532 return;
4533 }
4534
4535 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4536 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4537 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4538 ieee80211_sta_connection_lost(sdata,
4539 ifmgd->associated->bssid,
4540 WLAN_REASON_UNSPECIFIED,
4541 true);
4542 sdata_unlock(sdata);
4543 return;
4544 }
4545 sdata_unlock(sdata);
4546 }
4547 #endif
4548
4549 /* interface setup */
4550 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4551 {
4552 struct ieee80211_if_managed *ifmgd;
4553
4554 ifmgd = &sdata->u.mgd;
4555 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4556 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4557 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4558 ieee80211_beacon_connection_loss_work);
4559 INIT_WORK(&ifmgd->csa_connection_drop_work,
4560 ieee80211_csa_connection_drop_work);
4561 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4562 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4563 ieee80211_tdls_peer_del_work);
4564 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4565 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4566 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4567 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
4568 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4569 ieee80211_sta_handle_tspec_ac_params_wk);
4570
4571 ifmgd->flags = 0;
4572 ifmgd->powersave = sdata->wdev.ps;
4573 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4574 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4575 ifmgd->p2p_noa_index = -1;
4576
4577 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4578 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4579 else
4580 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4581
4582 /* Setup TDLS data */
4583 spin_lock_init(&ifmgd->teardown_lock);
4584 ifmgd->teardown_skb = NULL;
4585 ifmgd->orig_teardown_skb = NULL;
4586 }
4587
4588 /* scan finished notification */
4589 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4590 {
4591 struct ieee80211_sub_if_data *sdata;
4592
4593 /* Restart STA timers */
4594 rcu_read_lock();
4595 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4596 if (ieee80211_sdata_running(sdata))
4597 ieee80211_restart_sta_timer(sdata);
4598 }
4599 rcu_read_unlock();
4600 }
4601
4602 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4603 struct cfg80211_bss *cbss)
4604 {
4605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4606 const u8 *ht_cap_ie, *vht_cap_ie;
4607 const struct ieee80211_ht_cap *ht_cap;
4608 const struct ieee80211_vht_cap *vht_cap;
4609 u8 chains = 1;
4610
4611 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4612 return chains;
4613
4614 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4615 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4616 ht_cap = (void *)(ht_cap_ie + 2);
4617 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4618 /*
4619 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4620 * "Tx Unequal Modulation Supported" fields.
4621 */
4622 }
4623
4624 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4625 return chains;
4626
4627 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4628 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4629 u8 nss;
4630 u16 tx_mcs_map;
4631
4632 vht_cap = (void *)(vht_cap_ie + 2);
4633 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4634 for (nss = 8; nss > 0; nss--) {
4635 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4636 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4637 break;
4638 }
4639 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4640 chains = max(chains, nss);
4641 }
4642
4643 return chains;
4644 }
4645
4646 static bool
4647 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband,
4648 const struct ieee80211_he_operation *he_op)
4649 {
4650 const struct ieee80211_sta_he_cap *sta_he_cap =
4651 ieee80211_get_he_sta_cap(sband);
4652 u16 ap_min_req_set;
4653 int i;
4654
4655 if (!sta_he_cap || !he_op)
4656 return false;
4657
4658 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4659
4660 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4661 for (i = 0; i < 3; i++) {
4662 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4663 &sta_he_cap->he_mcs_nss_supp;
4664 u16 sta_mcs_map_rx =
4665 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4666 u16 sta_mcs_map_tx =
4667 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4668 u8 nss;
4669 bool verified = true;
4670
4671 /*
4672 * For each band there is a maximum of 8 spatial streams
4673 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4674 * of 2 bits per NSS (1-8), with the values defined in enum
4675 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4676 * capabilities aren't less than the AP's minimum requirements
4677 * for this HE BSS per SS.
4678 * It is enough to find one such band that meets the reqs.
4679 */
4680 for (nss = 8; nss > 0; nss--) {
4681 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4682 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4683 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4684
4685 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4686 continue;
4687
4688 /*
4689 * Make sure the HE AP doesn't require MCSs that aren't
4690 * supported by the client
4691 */
4692 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4693 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4694 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4695 verified = false;
4696 break;
4697 }
4698 }
4699
4700 if (verified)
4701 return true;
4702 }
4703
4704 /* If here, STA doesn't meet AP's HE min requirements */
4705 return false;
4706 }
4707
4708 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4709 struct cfg80211_bss *cbss)
4710 {
4711 struct ieee80211_local *local = sdata->local;
4712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4713 const struct ieee80211_ht_cap *ht_cap = NULL;
4714 const struct ieee80211_ht_operation *ht_oper = NULL;
4715 const struct ieee80211_vht_operation *vht_oper = NULL;
4716 const struct ieee80211_he_operation *he_oper = NULL;
4717 struct ieee80211_supported_band *sband;
4718 struct cfg80211_chan_def chandef;
4719 int ret;
4720 u32 i;
4721 bool have_80mhz;
4722
4723 sband = local->hw.wiphy->bands[cbss->channel->band];
4724
4725 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4726 IEEE80211_STA_DISABLE_80P80MHZ |
4727 IEEE80211_STA_DISABLE_160MHZ);
4728
4729 rcu_read_lock();
4730
4731 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4732 sband->ht_cap.ht_supported) {
4733 const u8 *ht_oper_ie, *ht_cap_ie;
4734
4735 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4736 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4737 ht_oper = (void *)(ht_oper_ie + 2);
4738
4739 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4740 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4741 ht_cap = (void *)(ht_cap_ie + 2);
4742
4743 if (!ht_cap) {
4744 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4745 ht_oper = NULL;
4746 }
4747 }
4748
4749 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4750 sband->vht_cap.vht_supported) {
4751 const u8 *vht_oper_ie, *vht_cap;
4752
4753 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4754 WLAN_EID_VHT_OPERATION);
4755 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4756 vht_oper = (void *)(vht_oper_ie + 2);
4757 if (vht_oper && !ht_oper) {
4758 vht_oper = NULL;
4759 sdata_info(sdata,
4760 "AP advertised VHT without HT, disabling both\n");
4761 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4762 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4763 }
4764
4765 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4766 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4767 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4768 vht_oper = NULL;
4769 }
4770 }
4771
4772 if (!ieee80211_get_he_sta_cap(sband))
4773 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4774
4775 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
4776 const struct cfg80211_bss_ies *ies;
4777 const u8 *he_oper_ie;
4778
4779 ies = rcu_dereference(cbss->ies);
4780 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
4781 ies->data, ies->len);
4782 if (he_oper_ie &&
4783 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3]))
4784 he_oper = (void *)(he_oper_ie + 3);
4785 else
4786 he_oper = NULL;
4787
4788 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4789 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
4790 }
4791
4792 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4793 have_80mhz = false;
4794 for (i = 0; i < sband->n_channels; i++) {
4795 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4796 IEEE80211_CHAN_NO_80MHZ))
4797 continue;
4798
4799 have_80mhz = true;
4800 break;
4801 }
4802
4803 if (!have_80mhz)
4804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4805
4806 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4807 cbss->channel,
4808 ht_oper, vht_oper, he_oper,
4809 &chandef, false);
4810
4811 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4812 local->rx_chains);
4813
4814 rcu_read_unlock();
4815
4816 /* will change later if needed */
4817 sdata->smps_mode = IEEE80211_SMPS_OFF;
4818
4819 mutex_lock(&local->mtx);
4820 /*
4821 * If this fails (possibly due to channel context sharing
4822 * on incompatible channels, e.g. 80+80 and 160 sharing the
4823 * same control channel) try to use a smaller bandwidth.
4824 */
4825 ret = ieee80211_vif_use_channel(sdata, &chandef,
4826 IEEE80211_CHANCTX_SHARED);
4827
4828 /* don't downgrade for 5 and 10 MHz channels, though. */
4829 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4830 chandef.width == NL80211_CHAN_WIDTH_10)
4831 goto out;
4832
4833 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4834 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4835 ret = ieee80211_vif_use_channel(sdata, &chandef,
4836 IEEE80211_CHANCTX_SHARED);
4837 }
4838 out:
4839 mutex_unlock(&local->mtx);
4840 return ret;
4841 }
4842
4843 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4844 u8 *dtim_count, u8 *dtim_period)
4845 {
4846 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4847 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4848 ies->len);
4849 const struct ieee80211_tim_ie *tim = NULL;
4850 const struct ieee80211_bssid_index *idx;
4851 bool valid = tim_ie && tim_ie[1] >= 2;
4852
4853 if (valid)
4854 tim = (void *)(tim_ie + 2);
4855
4856 if (dtim_count)
4857 *dtim_count = valid ? tim->dtim_count : 0;
4858
4859 if (dtim_period)
4860 *dtim_period = valid ? tim->dtim_period : 0;
4861
4862 /* Check if value is overridden by non-transmitted profile */
4863 if (!idx_ie || idx_ie[1] < 3)
4864 return valid;
4865
4866 idx = (void *)(idx_ie + 2);
4867
4868 if (dtim_count)
4869 *dtim_count = idx->dtim_count;
4870
4871 if (dtim_period)
4872 *dtim_period = idx->dtim_period;
4873
4874 return true;
4875 }
4876
4877 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4878 struct cfg80211_bss *cbss, bool assoc,
4879 bool override)
4880 {
4881 struct ieee80211_local *local = sdata->local;
4882 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4883 struct ieee80211_bss *bss = (void *)cbss->priv;
4884 struct sta_info *new_sta = NULL;
4885 struct ieee80211_supported_band *sband;
4886 bool have_sta = false;
4887 int err;
4888
4889 sband = local->hw.wiphy->bands[cbss->channel->band];
4890
4891 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4892 return -EINVAL;
4893
4894 /* If a reconfig is happening, bail out */
4895 if (local->in_reconfig)
4896 return -EBUSY;
4897
4898 if (assoc) {
4899 rcu_read_lock();
4900 have_sta = sta_info_get(sdata, cbss->bssid);
4901 rcu_read_unlock();
4902 }
4903
4904 if (!have_sta) {
4905 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4906 if (!new_sta)
4907 return -ENOMEM;
4908 }
4909
4910 /*
4911 * Set up the information for the new channel before setting the
4912 * new channel. We can't - completely race-free - change the basic
4913 * rates bitmap and the channel (sband) that it refers to, but if
4914 * we set it up before we at least avoid calling into the driver's
4915 * bss_info_changed() method with invalid information (since we do
4916 * call that from changing the channel - only for IDLE and perhaps
4917 * some others, but ...).
4918 *
4919 * So to avoid that, just set up all the new information before the
4920 * channel, but tell the driver to apply it only afterwards, since
4921 * it might need the new channel for that.
4922 */
4923 if (new_sta) {
4924 u32 rates = 0, basic_rates = 0;
4925 bool have_higher_than_11mbit;
4926 int min_rate = INT_MAX, min_rate_index = -1;
4927 const struct cfg80211_bss_ies *ies;
4928 int shift = ieee80211_vif_get_shift(&sdata->vif);
4929
4930 ieee80211_get_rates(sband, bss->supp_rates,
4931 bss->supp_rates_len,
4932 &rates, &basic_rates,
4933 &have_higher_than_11mbit,
4934 &min_rate, &min_rate_index,
4935 shift);
4936
4937 /*
4938 * This used to be a workaround for basic rates missing
4939 * in the association response frame. Now that we no
4940 * longer use the basic rates from there, it probably
4941 * doesn't happen any more, but keep the workaround so
4942 * in case some *other* APs are buggy in different ways
4943 * we can connect -- with a warning.
4944 */
4945 if (!basic_rates && min_rate_index >= 0) {
4946 sdata_info(sdata,
4947 "No basic rates, using min rate instead\n");
4948 basic_rates = BIT(min_rate_index);
4949 }
4950
4951 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4952 sdata->vif.bss_conf.basic_rates = basic_rates;
4953
4954 /* cf. IEEE 802.11 9.2.12 */
4955 if (cbss->channel->band == NL80211_BAND_2GHZ &&
4956 have_higher_than_11mbit)
4957 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4958 else
4959 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4960
4961 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4962
4963 /* set timing information */
4964 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4965 rcu_read_lock();
4966 ies = rcu_dereference(cbss->beacon_ies);
4967 if (ies) {
4968 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4969 sdata->vif.bss_conf.sync_device_ts =
4970 bss->device_ts_beacon;
4971
4972 ieee80211_get_dtim(ies,
4973 &sdata->vif.bss_conf.sync_dtim_count,
4974 NULL);
4975 } else if (!ieee80211_hw_check(&sdata->local->hw,
4976 TIMING_BEACON_ONLY)) {
4977 ies = rcu_dereference(cbss->proberesp_ies);
4978 /* must be non-NULL since beacon IEs were NULL */
4979 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4980 sdata->vif.bss_conf.sync_device_ts =
4981 bss->device_ts_presp;
4982 sdata->vif.bss_conf.sync_dtim_count = 0;
4983 } else {
4984 sdata->vif.bss_conf.sync_tsf = 0;
4985 sdata->vif.bss_conf.sync_device_ts = 0;
4986 sdata->vif.bss_conf.sync_dtim_count = 0;
4987 }
4988 rcu_read_unlock();
4989 }
4990
4991 if (new_sta || override) {
4992 err = ieee80211_prep_channel(sdata, cbss);
4993 if (err) {
4994 if (new_sta)
4995 sta_info_free(local, new_sta);
4996 return -EINVAL;
4997 }
4998 }
4999
5000 if (new_sta) {
5001 /*
5002 * tell driver about BSSID, basic rates and timing
5003 * this was set up above, before setting the channel
5004 */
5005 ieee80211_bss_info_change_notify(sdata,
5006 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
5007 BSS_CHANGED_BEACON_INT);
5008
5009 if (assoc)
5010 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
5011
5012 err = sta_info_insert(new_sta);
5013 new_sta = NULL;
5014 if (err) {
5015 sdata_info(sdata,
5016 "failed to insert STA entry for the AP (error %d)\n",
5017 err);
5018 return err;
5019 }
5020 } else
5021 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
5022
5023 /* Cancel scan to ensure that nothing interferes with connection */
5024 if (local->scanning)
5025 ieee80211_scan_cancel(local);
5026
5027 return 0;
5028 }
5029
5030 /* config hooks */
5031 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
5032 struct cfg80211_auth_request *req)
5033 {
5034 struct ieee80211_local *local = sdata->local;
5035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5036 struct ieee80211_mgd_auth_data *auth_data;
5037 u16 auth_alg;
5038 int err;
5039 bool cont_auth;
5040
5041 /* prepare auth data structure */
5042
5043 switch (req->auth_type) {
5044 case NL80211_AUTHTYPE_OPEN_SYSTEM:
5045 auth_alg = WLAN_AUTH_OPEN;
5046 break;
5047 case NL80211_AUTHTYPE_SHARED_KEY:
5048 if (IS_ERR(local->wep_tx_tfm))
5049 return -EOPNOTSUPP;
5050 auth_alg = WLAN_AUTH_SHARED_KEY;
5051 break;
5052 case NL80211_AUTHTYPE_FT:
5053 auth_alg = WLAN_AUTH_FT;
5054 break;
5055 case NL80211_AUTHTYPE_NETWORK_EAP:
5056 auth_alg = WLAN_AUTH_LEAP;
5057 break;
5058 case NL80211_AUTHTYPE_SAE:
5059 auth_alg = WLAN_AUTH_SAE;
5060 break;
5061 case NL80211_AUTHTYPE_FILS_SK:
5062 auth_alg = WLAN_AUTH_FILS_SK;
5063 break;
5064 case NL80211_AUTHTYPE_FILS_SK_PFS:
5065 auth_alg = WLAN_AUTH_FILS_SK_PFS;
5066 break;
5067 case NL80211_AUTHTYPE_FILS_PK:
5068 auth_alg = WLAN_AUTH_FILS_PK;
5069 break;
5070 default:
5071 return -EOPNOTSUPP;
5072 }
5073
5074 if (ifmgd->assoc_data)
5075 return -EBUSY;
5076
5077 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
5078 req->ie_len, GFP_KERNEL);
5079 if (!auth_data)
5080 return -ENOMEM;
5081
5082 auth_data->bss = req->bss;
5083
5084 if (req->auth_data_len >= 4) {
5085 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
5086 __le16 *pos = (__le16 *) req->auth_data;
5087
5088 auth_data->sae_trans = le16_to_cpu(pos[0]);
5089 auth_data->sae_status = le16_to_cpu(pos[1]);
5090 }
5091 memcpy(auth_data->data, req->auth_data + 4,
5092 req->auth_data_len - 4);
5093 auth_data->data_len += req->auth_data_len - 4;
5094 }
5095
5096 /* Check if continuing authentication or trying to authenticate with the
5097 * same BSS that we were in the process of authenticating with and avoid
5098 * removal and re-addition of the STA entry in
5099 * ieee80211_prep_connection().
5100 */
5101 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;
5102
5103 if (req->ie && req->ie_len) {
5104 memcpy(&auth_data->data[auth_data->data_len],
5105 req->ie, req->ie_len);
5106 auth_data->data_len += req->ie_len;
5107 }
5108
5109 if (req->key && req->key_len) {
5110 auth_data->key_len = req->key_len;
5111 auth_data->key_idx = req->key_idx;
5112 memcpy(auth_data->key, req->key, req->key_len);
5113 }
5114
5115 auth_data->algorithm = auth_alg;
5116
5117 /* try to authenticate/probe */
5118
5119 if (ifmgd->auth_data) {
5120 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
5121 auth_data->peer_confirmed =
5122 ifmgd->auth_data->peer_confirmed;
5123 }
5124 ieee80211_destroy_auth_data(sdata, cont_auth);
5125 }
5126
5127 /* prep auth_data so we don't go into idle on disassoc */
5128 ifmgd->auth_data = auth_data;
5129
5130 /* If this is continuation of an ongoing SAE authentication exchange
5131 * (i.e., request to send SAE Confirm) and the peer has already
5132 * confirmed, mark authentication completed since we are about to send
5133 * out SAE Confirm.
5134 */
5135 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
5136 auth_data->peer_confirmed && auth_data->sae_trans == 2)
5137 ieee80211_mark_sta_auth(sdata, req->bss->bssid);
5138
5139 if (ifmgd->associated) {
5140 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5141
5142 sdata_info(sdata,
5143 "disconnect from AP %pM for new auth to %pM\n",
5144 ifmgd->associated->bssid, req->bss->bssid);
5145 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5146 WLAN_REASON_UNSPECIFIED,
5147 false, frame_buf);
5148
5149 ieee80211_report_disconnect(sdata, frame_buf,
5150 sizeof(frame_buf), true,
5151 WLAN_REASON_UNSPECIFIED);
5152 }
5153
5154 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
5155
5156 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
5157 if (err)
5158 goto err_clear;
5159
5160 err = ieee80211_auth(sdata);
5161 if (err) {
5162 sta_info_destroy_addr(sdata, req->bss->bssid);
5163 goto err_clear;
5164 }
5165
5166 /* hold our own reference */
5167 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
5168 return 0;
5169
5170 err_clear:
5171 eth_zero_addr(ifmgd->bssid);
5172 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5173 ifmgd->auth_data = NULL;
5174 mutex_lock(&sdata->local->mtx);
5175 ieee80211_vif_release_channel(sdata);
5176 mutex_unlock(&sdata->local->mtx);
5177 kfree(auth_data);
5178 return err;
5179 }
5180
5181 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
5182 struct cfg80211_assoc_request *req)
5183 {
5184 struct ieee80211_local *local = sdata->local;
5185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5186 struct ieee80211_bss *bss = (void *)req->bss->priv;
5187 struct ieee80211_mgd_assoc_data *assoc_data;
5188 const struct cfg80211_bss_ies *beacon_ies;
5189 struct ieee80211_supported_band *sband;
5190 const u8 *ssidie, *ht_ie, *vht_ie;
5191 int i, err;
5192 bool override = false;
5193
5194 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
5195 if (!assoc_data)
5196 return -ENOMEM;
5197
5198 rcu_read_lock();
5199 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
5200 if (!ssidie) {
5201 rcu_read_unlock();
5202 kfree(assoc_data);
5203 return -EINVAL;
5204 }
5205 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
5206 assoc_data->ssid_len = ssidie[1];
5207 rcu_read_unlock();
5208
5209 if (ifmgd->associated) {
5210 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5211
5212 sdata_info(sdata,
5213 "disconnect from AP %pM for new assoc to %pM\n",
5214 ifmgd->associated->bssid, req->bss->bssid);
5215 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5216 WLAN_REASON_UNSPECIFIED,
5217 false, frame_buf);
5218
5219 ieee80211_report_disconnect(sdata, frame_buf,
5220 sizeof(frame_buf), true,
5221 WLAN_REASON_UNSPECIFIED);
5222 }
5223
5224 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
5225 err = -EBUSY;
5226 goto err_free;
5227 }
5228
5229 if (ifmgd->assoc_data) {
5230 err = -EBUSY;
5231 goto err_free;
5232 }
5233
5234 if (ifmgd->auth_data) {
5235 bool match;
5236
5237 /* keep sta info, bssid if matching */
5238 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
5239 ieee80211_destroy_auth_data(sdata, match);
5240 }
5241
5242 /* prepare assoc data */
5243
5244 ifmgd->beacon_crc_valid = false;
5245
5246 assoc_data->wmm = bss->wmm_used &&
5247 (local->hw.queues >= IEEE80211_NUM_ACS);
5248
5249 /*
5250 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
5251 * We still associate in non-HT mode (11a/b/g) if any one of these
5252 * ciphers is configured as pairwise.
5253 * We can set this to true for non-11n hardware, that'll be checked
5254 * separately along with the peer capabilities.
5255 */
5256 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5257 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5258 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5259 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5260 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5261 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5262 ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
5263 netdev_info(sdata->dev,
5264 "disabling HE/HT/VHT due to WEP/TKIP use\n");
5265 }
5266 }
5267
5268 /* Also disable HT if we don't support it or the AP doesn't use WMM */
5269 sband = local->hw.wiphy->bands[req->bss->channel->band];
5270 if (!sband->ht_cap.ht_supported ||
5271 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5272 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5273 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5274 if (!bss->wmm_used &&
5275 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5276 netdev_info(sdata->dev,
5277 "disabling HT as WMM/QoS is not supported by the AP\n");
5278 }
5279
5280 /* disable VHT if we don't support it or the AP doesn't use WMM */
5281 if (!sband->vht_cap.vht_supported ||
5282 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
5283 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
5284 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5285 if (!bss->wmm_used &&
5286 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
5287 netdev_info(sdata->dev,
5288 "disabling VHT as WMM/QoS is not supported by the AP\n");
5289 }
5290
5291 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
5292 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
5293 sizeof(ifmgd->ht_capa_mask));
5294
5295 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
5296 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
5297 sizeof(ifmgd->vht_capa_mask));
5298
5299 if (req->ie && req->ie_len) {
5300 memcpy(assoc_data->ie, req->ie, req->ie_len);
5301 assoc_data->ie_len = req->ie_len;
5302 }
5303
5304 if (req->fils_kek) {
5305 /* should already be checked in cfg80211 - so warn */
5306 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
5307 err = -EINVAL;
5308 goto err_free;
5309 }
5310 memcpy(assoc_data->fils_kek, req->fils_kek,
5311 req->fils_kek_len);
5312 assoc_data->fils_kek_len = req->fils_kek_len;
5313 }
5314
5315 if (req->fils_nonces)
5316 memcpy(assoc_data->fils_nonces, req->fils_nonces,
5317 2 * FILS_NONCE_LEN);
5318
5319 assoc_data->bss = req->bss;
5320
5321 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
5322 if (ifmgd->powersave)
5323 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
5324 else
5325 sdata->smps_mode = IEEE80211_SMPS_OFF;
5326 } else
5327 sdata->smps_mode = ifmgd->req_smps;
5328
5329 assoc_data->capability = req->bss->capability;
5330 assoc_data->supp_rates = bss->supp_rates;
5331 assoc_data->supp_rates_len = bss->supp_rates_len;
5332
5333 rcu_read_lock();
5334 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
5335 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
5336 assoc_data->ap_ht_param =
5337 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
5338 else
5339 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5340 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
5341 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
5342 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
5343 sizeof(struct ieee80211_vht_cap));
5344 else
5345 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5346 rcu_read_unlock();
5347
5348 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
5349 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
5350 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
5351 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
5352
5353 if (bss->wmm_used && bss->uapsd_supported &&
5354 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
5355 assoc_data->uapsd = true;
5356 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
5357 } else {
5358 assoc_data->uapsd = false;
5359 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
5360 }
5361
5362 if (req->prev_bssid)
5363 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
5364
5365 if (req->use_mfp) {
5366 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
5367 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
5368 } else {
5369 ifmgd->mfp = IEEE80211_MFP_DISABLED;
5370 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
5371 }
5372
5373 if (req->flags & ASSOC_REQ_USE_RRM)
5374 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
5375 else
5376 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
5377
5378 if (req->crypto.control_port)
5379 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
5380 else
5381 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
5382
5383 sdata->control_port_protocol = req->crypto.control_port_ethertype;
5384 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
5385 sdata->control_port_over_nl80211 =
5386 req->crypto.control_port_over_nl80211;
5387 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
5388 sdata->vif.type);
5389
5390 /* kick off associate process */
5391
5392 ifmgd->assoc_data = assoc_data;
5393 ifmgd->dtim_period = 0;
5394 ifmgd->have_beacon = false;
5395
5396 /* override HT/VHT configuration only if the AP and we support it */
5397 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
5398 struct ieee80211_sta_ht_cap sta_ht_cap;
5399
5400 if (req->flags & ASSOC_REQ_DISABLE_HT)
5401 override = true;
5402
5403 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
5404 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5405
5406 /* check for 40 MHz disable override */
5407 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
5408 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
5409 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
5410 override = true;
5411
5412 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
5413 req->flags & ASSOC_REQ_DISABLE_VHT)
5414 override = true;
5415 }
5416
5417 if (req->flags & ASSOC_REQ_DISABLE_HT) {
5418 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
5419 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5420 }
5421
5422 if (req->flags & ASSOC_REQ_DISABLE_VHT)
5423 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
5424
5425 err = ieee80211_prep_connection(sdata, req->bss, true, override);
5426 if (err)
5427 goto err_clear;
5428
5429 rcu_read_lock();
5430 beacon_ies = rcu_dereference(req->bss->beacon_ies);
5431
5432 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
5433 !beacon_ies) {
5434 /*
5435 * Wait up to one beacon interval ...
5436 * should this be more if we miss one?
5437 */
5438 sdata_info(sdata, "waiting for beacon from %pM\n",
5439 ifmgd->bssid);
5440 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
5441 assoc_data->timeout_started = true;
5442 assoc_data->need_beacon = true;
5443 } else if (beacon_ies) {
5444 const u8 *ie;
5445 u8 dtim_count = 0;
5446
5447 ieee80211_get_dtim(beacon_ies, &dtim_count,
5448 &ifmgd->dtim_period);
5449
5450 ifmgd->have_beacon = true;
5451 assoc_data->timeout = jiffies;
5452 assoc_data->timeout_started = true;
5453
5454 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5455 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
5456 sdata->vif.bss_conf.sync_device_ts =
5457 bss->device_ts_beacon;
5458 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
5459 }
5460
5461 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
5462 beacon_ies->data, beacon_ies->len);
5463 if (ie && ie[1] >= 3)
5464 sdata->vif.bss_conf.profile_periodicity = ie[4];
5465
5466 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY,
5467 beacon_ies->data, beacon_ies->len);
5468 if (ie && ie[1] >= 11 &&
5469 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5470 sdata->vif.bss_conf.ema_ap = true;
5471 } else {
5472 assoc_data->timeout = jiffies;
5473 assoc_data->timeout_started = true;
5474 }
5475 rcu_read_unlock();
5476
5477 run_again(sdata, assoc_data->timeout);
5478
5479 if (bss->corrupt_data) {
5480 char *corrupt_type = "data";
5481 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
5482 if (bss->corrupt_data &
5483 IEEE80211_BSS_CORRUPT_PROBE_RESP)
5484 corrupt_type = "beacon and probe response";
5485 else
5486 corrupt_type = "beacon";
5487 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
5488 corrupt_type = "probe response";
5489 sdata_info(sdata, "associating with AP with corrupt %s\n",
5490 corrupt_type);
5491 }
5492
5493 return 0;
5494 err_clear:
5495 eth_zero_addr(ifmgd->bssid);
5496 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
5497 ifmgd->assoc_data = NULL;
5498 err_free:
5499 kfree(assoc_data);
5500 return err;
5501 }
5502
5503 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
5504 struct cfg80211_deauth_request *req)
5505 {
5506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5507 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5508 bool tx = !req->local_state_change;
5509
5510 if (ifmgd->auth_data &&
5511 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
5512 sdata_info(sdata,
5513 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
5514 req->bssid, req->reason_code,
5515 ieee80211_get_reason_code_string(req->reason_code));
5516
5517 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5518 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5519 IEEE80211_STYPE_DEAUTH,
5520 req->reason_code, tx,
5521 frame_buf);
5522 ieee80211_destroy_auth_data(sdata, false);
5523 ieee80211_report_disconnect(sdata, frame_buf,
5524 sizeof(frame_buf), true,
5525 req->reason_code);
5526
5527 return 0;
5528 }
5529
5530 if (ifmgd->assoc_data &&
5531 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
5532 sdata_info(sdata,
5533 "aborting association with %pM by local choice (Reason: %u=%s)\n",
5534 req->bssid, req->reason_code,
5535 ieee80211_get_reason_code_string(req->reason_code));
5536
5537 drv_mgd_prepare_tx(sdata->local, sdata, 0);
5538 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5539 IEEE80211_STYPE_DEAUTH,
5540 req->reason_code, tx,
5541 frame_buf);
5542 ieee80211_destroy_assoc_data(sdata, false, true);
5543 ieee80211_report_disconnect(sdata, frame_buf,
5544 sizeof(frame_buf), true,
5545 req->reason_code);
5546 return 0;
5547 }
5548
5549 if (ifmgd->associated &&
5550 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
5551 sdata_info(sdata,
5552 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5553 req->bssid, req->reason_code,
5554 ieee80211_get_reason_code_string(req->reason_code));
5555
5556 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5557 req->reason_code, tx, frame_buf);
5558 ieee80211_report_disconnect(sdata, frame_buf,
5559 sizeof(frame_buf), true,
5560 req->reason_code);
5561 return 0;
5562 }
5563
5564 return -ENOTCONN;
5565 }
5566
5567 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
5568 struct cfg80211_disassoc_request *req)
5569 {
5570 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5571 u8 bssid[ETH_ALEN];
5572 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5573
5574 /*
5575 * cfg80211 should catch this ... but it's racy since
5576 * we can receive a disassoc frame, process it, hand it
5577 * to cfg80211 while that's in a locked section already
5578 * trying to tell us that the user wants to disconnect.
5579 */
5580 if (ifmgd->associated != req->bss)
5581 return -ENOLINK;
5582
5583 sdata_info(sdata,
5584 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5585 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5586
5587 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5588 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5589 req->reason_code, !req->local_state_change,
5590 frame_buf);
5591
5592 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5593 req->reason_code);
5594
5595 return 0;
5596 }
5597
5598 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5599 {
5600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5601
5602 /*
5603 * Make sure some work items will not run after this,
5604 * they will not do anything but might not have been
5605 * cancelled when disconnecting.
5606 */
5607 cancel_work_sync(&ifmgd->monitor_work);
5608 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5609 cancel_work_sync(&ifmgd->request_smps_work);
5610 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5611 cancel_work_sync(&ifmgd->chswitch_work);
5612 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5613
5614 sdata_lock(sdata);
5615 if (ifmgd->assoc_data) {
5616 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5617 ieee80211_destroy_assoc_data(sdata, false, false);
5618 cfg80211_assoc_timeout(sdata->dev, bss);
5619 }
5620 if (ifmgd->auth_data)
5621 ieee80211_destroy_auth_data(sdata, false);
5622 spin_lock_bh(&ifmgd->teardown_lock);
5623 if (ifmgd->teardown_skb) {
5624 kfree_skb(ifmgd->teardown_skb);
5625 ifmgd->teardown_skb = NULL;
5626 ifmgd->orig_teardown_skb = NULL;
5627 }
5628 kfree(ifmgd->assoc_req_ies);
5629 ifmgd->assoc_req_ies = NULL;
5630 ifmgd->assoc_req_ies_len = 0;
5631 spin_unlock_bh(&ifmgd->teardown_lock);
5632 del_timer_sync(&ifmgd->timer);
5633 sdata_unlock(sdata);
5634 }
5635
5636 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5637 enum nl80211_cqm_rssi_threshold_event rssi_event,
5638 s32 rssi_level,
5639 gfp_t gfp)
5640 {
5641 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5642
5643 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
5644
5645 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
5646 }
5647 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5648
5649 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5650 {
5651 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5652
5653 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5654
5655 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5656 }
5657 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Mirror of linux-2.6-arm at arm.linux.org.uk