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877b647d3e5c9fea295e0a4ad6f3318476cc67c6
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
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 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 sdata_assert_lock(sdata);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
135 ifmgd->probe_send_count = 0;
136
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146 return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
157 {
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 struct ieee80211_sta_ht_cap sta_ht_cap;
161 u32 ht_cfreq, ret;
162
163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
180 ret = IEEE80211_STA_DISABLE_40MHZ;
181 goto out;
182 }
183
184 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
185 channel->band);
186 /* check that channel matches the right operating channel */
187 if (!tracking && channel->center_freq != ht_cfreq) {
188 /*
189 * It's possible that some APs are confused here;
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel in association responses, but
192 * since we look at probe response/beacon data here
193 * it should be OK.
194 */
195 sdata_info(sdata,
196 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
197 channel->center_freq, ht_cfreq,
198 ht_oper->primary_chan, channel->band);
199 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
200 goto out;
201 }
202
203 /* check 40 MHz support, if we have it */
204 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
205 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
206 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 += 10;
209 break;
210 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
211 chandef->width = NL80211_CHAN_WIDTH_40;
212 chandef->center_freq1 -= 10;
213 break;
214 }
215 } else {
216 /* 40 MHz (and 80 MHz) must be supported for VHT */
217 ret = IEEE80211_STA_DISABLE_VHT;
218 /* also mark 40 MHz disabled */
219 ret |= IEEE80211_STA_DISABLE_40MHZ;
220 goto out;
221 }
222
223 if (!vht_oper || !sband->vht_cap.vht_supported) {
224 ret = IEEE80211_STA_DISABLE_VHT;
225 goto out;
226 }
227
228 vht_chandef.chan = channel;
229 vht_chandef.center_freq1 =
230 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
231 channel->band);
232 vht_chandef.center_freq2 = 0;
233
234 switch (vht_oper->chan_width) {
235 case IEEE80211_VHT_CHANWIDTH_USE_HT:
236 vht_chandef.width = chandef->width;
237 vht_chandef.center_freq1 = chandef->center_freq1;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80;
241 break;
242 case IEEE80211_VHT_CHANWIDTH_160MHZ:
243 vht_chandef.width = NL80211_CHAN_WIDTH_160;
244 break;
245 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
246 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
247 vht_chandef.center_freq2 =
248 ieee80211_channel_to_frequency(
249 vht_oper->center_freq_seg2_idx,
250 channel->band);
251 break;
252 default:
253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
254 sdata_info(sdata,
255 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
256 vht_oper->chan_width);
257 ret = IEEE80211_STA_DISABLE_VHT;
258 goto out;
259 }
260
261 if (!cfg80211_chandef_valid(&vht_chandef)) {
262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
263 sdata_info(sdata,
264 "AP VHT information is invalid, disable VHT\n");
265 ret = IEEE80211_STA_DISABLE_VHT;
266 goto out;
267 }
268
269 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
270 ret = 0;
271 goto out;
272 }
273
274 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
275 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
276 sdata_info(sdata,
277 "AP VHT information doesn't match HT, disable VHT\n");
278 ret = IEEE80211_STA_DISABLE_VHT;
279 goto out;
280 }
281
282 *chandef = vht_chandef;
283
284 ret = 0;
285
286 out:
287 /*
288 * When tracking the current AP, don't do any further checks if the
289 * new chandef is identical to the one we're currently using for the
290 * connection. This keeps us from playing ping-pong with regulatory,
291 * without it the following can happen (for example):
292 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
293 * - AP advertises regdom US
294 * - CRDA loads regdom US with 80 MHz prohibited (old database)
295 * - the code below detects an unsupported channel, downgrades, and
296 * we disconnect from the AP in the caller
297 * - disconnect causes CRDA to reload world regdomain and the game
298 * starts anew.
299 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
300 *
301 * It seems possible that there are still scenarios with CSA or real
302 * bandwidth changes where a this could happen, but those cases are
303 * less common and wouldn't completely prevent using the AP.
304 */
305 if (tracking &&
306 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
307 return ret;
308
309 /* don't print the message below for VHT mismatch if VHT is disabled */
310 if (ret & IEEE80211_STA_DISABLE_VHT)
311 vht_chandef = *chandef;
312
313 /*
314 * Ignore the DISABLED flag when we're already connected and only
315 * tracking the APs beacon for bandwidth changes - otherwise we
316 * might get disconnected here if we connect to an AP, update our
317 * regulatory information based on the AP's country IE and the
318 * information we have is wrong/outdated and disables the channel
319 * that we're actually using for the connection to the AP.
320 */
321 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
322 tracking ? 0 :
323 IEEE80211_CHAN_DISABLED)) {
324 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
325 ret = IEEE80211_STA_DISABLE_HT |
326 IEEE80211_STA_DISABLE_VHT;
327 break;
328 }
329
330 ret |= ieee80211_chandef_downgrade(chandef);
331 }
332
333 if (chandef->width != vht_chandef.width && !tracking)
334 sdata_info(sdata,
335 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
336
337 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
338 return ret;
339 }
340
341 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
342 struct sta_info *sta,
343 const struct ieee80211_ht_cap *ht_cap,
344 const struct ieee80211_ht_operation *ht_oper,
345 const struct ieee80211_vht_operation *vht_oper,
346 const u8 *bssid, u32 *changed)
347 {
348 struct ieee80211_local *local = sdata->local;
349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
350 struct ieee80211_supported_band *sband;
351 struct ieee80211_channel *chan;
352 struct cfg80211_chan_def chandef;
353 u16 ht_opmode;
354 u32 flags;
355 enum ieee80211_sta_rx_bandwidth new_sta_bw;
356 int ret;
357
358 /* if HT was/is disabled, don't track any bandwidth changes */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
360 return 0;
361
362 /* don't check VHT if we associated as non-VHT station */
363 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
364 vht_oper = NULL;
365
366 if (WARN_ON_ONCE(!sta))
367 return -EINVAL;
368
369 /*
370 * if bss configuration changed store the new one -
371 * this may be applicable even if channel is identical
372 */
373 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
374 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
375 *changed |= BSS_CHANGED_HT;
376 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
377 }
378
379 chan = sdata->vif.bss_conf.chandef.chan;
380 sband = local->hw.wiphy->bands[chan->band];
381
382 /* calculate new channel (type) based on HT/VHT operation IEs */
383 flags = ieee80211_determine_chantype(sdata, sband, chan,
384 ht_cap, ht_oper, vht_oper,
385 &chandef, true);
386
387 /*
388 * Downgrade the new channel if we associated with restricted
389 * capabilities. For example, if we associated as a 20 MHz STA
390 * to a 40 MHz AP (due to regulatory, capabilities or config
391 * reasons) then switching to a 40 MHz channel now won't do us
392 * any good -- we couldn't use it with the AP.
393 */
394 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
395 chandef.width == NL80211_CHAN_WIDTH_80P80)
396 flags |= ieee80211_chandef_downgrade(&chandef);
397 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
398 chandef.width == NL80211_CHAN_WIDTH_160)
399 flags |= ieee80211_chandef_downgrade(&chandef);
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
401 chandef.width > NL80211_CHAN_WIDTH_20)
402 flags |= ieee80211_chandef_downgrade(&chandef);
403
404 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
405 return 0;
406
407 sdata_info(sdata,
408 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
409 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
410 chandef.center_freq1, chandef.center_freq2);
411
412 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
413 IEEE80211_STA_DISABLE_VHT |
414 IEEE80211_STA_DISABLE_40MHZ |
415 IEEE80211_STA_DISABLE_80P80MHZ |
416 IEEE80211_STA_DISABLE_160MHZ)) ||
417 !cfg80211_chandef_valid(&chandef)) {
418 sdata_info(sdata,
419 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
420 ifmgd->bssid);
421 return -EINVAL;
422 }
423
424 switch (chandef.width) {
425 case NL80211_CHAN_WIDTH_20_NOHT:
426 case NL80211_CHAN_WIDTH_20:
427 new_sta_bw = IEEE80211_STA_RX_BW_20;
428 break;
429 case NL80211_CHAN_WIDTH_40:
430 new_sta_bw = IEEE80211_STA_RX_BW_40;
431 break;
432 case NL80211_CHAN_WIDTH_80:
433 new_sta_bw = IEEE80211_STA_RX_BW_80;
434 break;
435 case NL80211_CHAN_WIDTH_80P80:
436 case NL80211_CHAN_WIDTH_160:
437 new_sta_bw = IEEE80211_STA_RX_BW_160;
438 break;
439 default:
440 return -EINVAL;
441 }
442
443 if (new_sta_bw > sta->cur_max_bandwidth)
444 new_sta_bw = sta->cur_max_bandwidth;
445
446 if (new_sta_bw < sta->sta.bandwidth) {
447 sta->sta.bandwidth = new_sta_bw;
448 rate_control_rate_update(local, sband, sta,
449 IEEE80211_RC_BW_CHANGED);
450 }
451
452 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
453 if (ret) {
454 sdata_info(sdata,
455 "AP %pM changed bandwidth to incompatible one - disconnect\n",
456 ifmgd->bssid);
457 return ret;
458 }
459
460 if (new_sta_bw > sta->sta.bandwidth) {
461 sta->sta.bandwidth = new_sta_bw;
462 rate_control_rate_update(local, sband, sta,
463 IEEE80211_RC_BW_CHANGED);
464 }
465
466 return 0;
467 }
468
469 /* frame sending functions */
470
471 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
472 struct sk_buff *skb, u8 ap_ht_param,
473 struct ieee80211_supported_band *sband,
474 struct ieee80211_channel *channel,
475 enum ieee80211_smps_mode smps)
476 {
477 u8 *pos;
478 u32 flags = channel->flags;
479 u16 cap;
480 struct ieee80211_sta_ht_cap ht_cap;
481
482 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
483
484 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
485 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
486
487 /* determine capability flags */
488 cap = ht_cap.cap;
489
490 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
491 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
492 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496 break;
497 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
498 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
499 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
500 cap &= ~IEEE80211_HT_CAP_SGI_40;
501 }
502 break;
503 }
504
505 /*
506 * If 40 MHz was disabled associate as though we weren't
507 * capable of 40 MHz -- some broken APs will never fall
508 * back to trying to transmit in 20 MHz.
509 */
510 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
511 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
512 cap &= ~IEEE80211_HT_CAP_SGI_40;
513 }
514
515 /* set SM PS mode properly */
516 cap &= ~IEEE80211_HT_CAP_SM_PS;
517 switch (smps) {
518 case IEEE80211_SMPS_AUTOMATIC:
519 case IEEE80211_SMPS_NUM_MODES:
520 WARN_ON(1);
521 case IEEE80211_SMPS_OFF:
522 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_STATIC:
526 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 case IEEE80211_SMPS_DYNAMIC:
530 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
531 IEEE80211_HT_CAP_SM_PS_SHIFT;
532 break;
533 }
534
535 /* reserve and fill IE */
536 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
537 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
538 }
539
540 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
541 struct sk_buff *skb,
542 struct ieee80211_supported_band *sband,
543 struct ieee80211_vht_cap *ap_vht_cap)
544 {
545 u8 *pos;
546 u32 cap;
547 struct ieee80211_sta_vht_cap vht_cap;
548 u32 mask, ap_bf_sts, our_bf_sts;
549
550 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
551
552 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
553 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
554
555 /* determine capability flags */
556 cap = vht_cap.cap;
557
558 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
559 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
560
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
562 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
563 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
564 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
565 }
566
567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
568 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
569 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
570 }
571
572 /*
573 * Some APs apparently get confused if our capabilities are better
574 * than theirs, so restrict what we advertise in the assoc request.
575 */
576 if (!(ap_vht_cap->vht_cap_info &
577 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
578 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
579
580 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
581
582 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
583 our_bf_sts = cap & mask;
584
585 if (ap_bf_sts < our_bf_sts) {
586 cap &= ~mask;
587 cap |= ap_bf_sts;
588 }
589
590 /* reserve and fill IE */
591 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
592 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
593 }
594
595 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
596 {
597 struct ieee80211_local *local = sdata->local;
598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
599 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
600 struct sk_buff *skb;
601 struct ieee80211_mgmt *mgmt;
602 u8 *pos, qos_info;
603 size_t offset = 0, noffset;
604 int i, count, rates_len, supp_rates_len, shift;
605 u16 capab;
606 struct ieee80211_supported_band *sband;
607 struct ieee80211_chanctx_conf *chanctx_conf;
608 struct ieee80211_channel *chan;
609 u32 rate_flags, rates = 0;
610
611 sdata_assert_lock(sdata);
612
613 rcu_read_lock();
614 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
615 if (WARN_ON(!chanctx_conf)) {
616 rcu_read_unlock();
617 return;
618 }
619 chan = chanctx_conf->def.chan;
620 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
621 rcu_read_unlock();
622 sband = local->hw.wiphy->bands[chan->band];
623 shift = ieee80211_vif_get_shift(&sdata->vif);
624
625 if (assoc_data->supp_rates_len) {
626 /*
627 * Get all rates supported by the device and the AP as
628 * some APs don't like getting a superset of their rates
629 * in the association request (e.g. D-Link DAP 1353 in
630 * b-only mode)...
631 */
632 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
633 assoc_data->supp_rates,
634 assoc_data->supp_rates_len,
635 &rates);
636 } else {
637 /*
638 * In case AP not provide any supported rates information
639 * before association, we send information element(s) with
640 * all rates that we support.
641 */
642 rates_len = 0;
643 for (i = 0; i < sband->n_bitrates; i++) {
644 if ((rate_flags & sband->bitrates[i].flags)
645 != rate_flags)
646 continue;
647 rates |= BIT(i);
648 rates_len++;
649 }
650 }
651
652 skb = alloc_skb(local->hw.extra_tx_headroom +
653 sizeof(*mgmt) + /* bit too much but doesn't matter */
654 2 + assoc_data->ssid_len + /* SSID */
655 4 + rates_len + /* (extended) rates */
656 4 + /* power capability */
657 2 + 2 * sband->n_channels + /* supported channels */
658 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
659 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
660 assoc_data->ie_len + /* extra IEs */
661 9, /* WMM */
662 GFP_KERNEL);
663 if (!skb)
664 return;
665
666 skb_reserve(skb, local->hw.extra_tx_headroom);
667
668 capab = WLAN_CAPABILITY_ESS;
669
670 if (sband->band == IEEE80211_BAND_2GHZ) {
671 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
672 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
673 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
674 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
675 }
676
677 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
678 capab |= WLAN_CAPABILITY_PRIVACY;
679
680 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
681 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
682 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
683
684 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
685 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
686
687 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
688 memset(mgmt, 0, 24);
689 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
690 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
691 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
692
693 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
694 skb_put(skb, 10);
695 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
696 IEEE80211_STYPE_REASSOC_REQ);
697 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
698 mgmt->u.reassoc_req.listen_interval =
699 cpu_to_le16(local->hw.conf.listen_interval);
700 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
701 ETH_ALEN);
702 } else {
703 skb_put(skb, 4);
704 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
705 IEEE80211_STYPE_ASSOC_REQ);
706 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
707 mgmt->u.assoc_req.listen_interval =
708 cpu_to_le16(local->hw.conf.listen_interval);
709 }
710
711 /* SSID */
712 pos = skb_put(skb, 2 + assoc_data->ssid_len);
713 *pos++ = WLAN_EID_SSID;
714 *pos++ = assoc_data->ssid_len;
715 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
716
717 /* add all rates which were marked to be used above */
718 supp_rates_len = rates_len;
719 if (supp_rates_len > 8)
720 supp_rates_len = 8;
721
722 pos = skb_put(skb, supp_rates_len + 2);
723 *pos++ = WLAN_EID_SUPP_RATES;
724 *pos++ = supp_rates_len;
725
726 count = 0;
727 for (i = 0; i < sband->n_bitrates; i++) {
728 if (BIT(i) & rates) {
729 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
730 5 * (1 << shift));
731 *pos++ = (u8) rate;
732 if (++count == 8)
733 break;
734 }
735 }
736
737 if (rates_len > count) {
738 pos = skb_put(skb, rates_len - count + 2);
739 *pos++ = WLAN_EID_EXT_SUPP_RATES;
740 *pos++ = rates_len - count;
741
742 for (i++; i < sband->n_bitrates; i++) {
743 if (BIT(i) & rates) {
744 int rate;
745 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
746 5 * (1 << shift));
747 *pos++ = (u8) rate;
748 }
749 }
750 }
751
752 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
753 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
754 pos = skb_put(skb, 4);
755 *pos++ = WLAN_EID_PWR_CAPABILITY;
756 *pos++ = 2;
757 *pos++ = 0; /* min tx power */
758 /* max tx power */
759 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
760 }
761
762 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
763 /* TODO: get this in reg domain format */
764 pos = skb_put(skb, 2 * sband->n_channels + 2);
765 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
766 *pos++ = 2 * sband->n_channels;
767 for (i = 0; i < sband->n_channels; i++) {
768 *pos++ = ieee80211_frequency_to_channel(
769 sband->channels[i].center_freq);
770 *pos++ = 1; /* one channel in the subband*/
771 }
772 }
773
774 /* if present, add any custom IEs that go before HT */
775 if (assoc_data->ie_len) {
776 static const u8 before_ht[] = {
777 WLAN_EID_SSID,
778 WLAN_EID_SUPP_RATES,
779 WLAN_EID_EXT_SUPP_RATES,
780 WLAN_EID_PWR_CAPABILITY,
781 WLAN_EID_SUPPORTED_CHANNELS,
782 WLAN_EID_RSN,
783 WLAN_EID_QOS_CAPA,
784 WLAN_EID_RRM_ENABLED_CAPABILITIES,
785 WLAN_EID_MOBILITY_DOMAIN,
786 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
787 WLAN_EID_RIC_DATA, /* reassoc only */
788 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
789 };
790 static const u8 after_ric[] = {
791 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
792 WLAN_EID_HT_CAPABILITY,
793 WLAN_EID_BSS_COEX_2040,
794 WLAN_EID_EXT_CAPABILITY,
795 WLAN_EID_QOS_TRAFFIC_CAPA,
796 WLAN_EID_TIM_BCAST_REQ,
797 WLAN_EID_INTERWORKING,
798 /* 60GHz doesn't happen right now */
799 WLAN_EID_VHT_CAPABILITY,
800 WLAN_EID_OPMODE_NOTIF,
801 };
802
803 noffset = ieee80211_ie_split_ric(assoc_data->ie,
804 assoc_data->ie_len,
805 before_ht,
806 ARRAY_SIZE(before_ht),
807 after_ric,
808 ARRAY_SIZE(after_ric),
809 offset);
810 pos = skb_put(skb, noffset - offset);
811 memcpy(pos, assoc_data->ie + offset, noffset - offset);
812 offset = noffset;
813 }
814
815 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
816 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
817 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
818
819 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
820 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
821 sband, chan, sdata->smps_mode);
822
823 /* if present, add any custom IEs that go before VHT */
824 if (assoc_data->ie_len) {
825 static const u8 before_vht[] = {
826 WLAN_EID_SSID,
827 WLAN_EID_SUPP_RATES,
828 WLAN_EID_EXT_SUPP_RATES,
829 WLAN_EID_PWR_CAPABILITY,
830 WLAN_EID_SUPPORTED_CHANNELS,
831 WLAN_EID_RSN,
832 WLAN_EID_QOS_CAPA,
833 WLAN_EID_RRM_ENABLED_CAPABILITIES,
834 WLAN_EID_MOBILITY_DOMAIN,
835 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
836 WLAN_EID_HT_CAPABILITY,
837 WLAN_EID_BSS_COEX_2040,
838 WLAN_EID_EXT_CAPABILITY,
839 WLAN_EID_QOS_TRAFFIC_CAPA,
840 WLAN_EID_TIM_BCAST_REQ,
841 WLAN_EID_INTERWORKING,
842 };
843
844 /* RIC already taken above, so no need to handle here anymore */
845 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
846 before_vht, ARRAY_SIZE(before_vht),
847 offset);
848 pos = skb_put(skb, noffset - offset);
849 memcpy(pos, assoc_data->ie + offset, noffset - offset);
850 offset = noffset;
851 }
852
853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
854 ieee80211_add_vht_ie(sdata, skb, sband,
855 &assoc_data->ap_vht_cap);
856
857 /* if present, add any custom non-vendor IEs that go after HT */
858 if (assoc_data->ie_len) {
859 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
860 assoc_data->ie_len,
861 offset);
862 pos = skb_put(skb, noffset - offset);
863 memcpy(pos, assoc_data->ie + offset, noffset - offset);
864 offset = noffset;
865 }
866
867 if (assoc_data->wmm) {
868 if (assoc_data->uapsd) {
869 qos_info = ifmgd->uapsd_queues;
870 qos_info |= (ifmgd->uapsd_max_sp_len <<
871 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
872 } else {
873 qos_info = 0;
874 }
875
876 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
877 }
878
879 /* add any remaining custom (i.e. vendor specific here) IEs */
880 if (assoc_data->ie_len) {
881 noffset = assoc_data->ie_len;
882 pos = skb_put(skb, noffset - offset);
883 memcpy(pos, assoc_data->ie + offset, noffset - offset);
884 }
885
886 drv_mgd_prepare_tx(local, sdata);
887
888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
891 IEEE80211_TX_INTFL_MLME_CONN_TX;
892 ieee80211_tx_skb(sdata, skb);
893 }
894
895 void ieee80211_send_pspoll(struct ieee80211_local *local,
896 struct ieee80211_sub_if_data *sdata)
897 {
898 struct ieee80211_pspoll *pspoll;
899 struct sk_buff *skb;
900
901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
902 if (!skb)
903 return;
904
905 pspoll = (struct ieee80211_pspoll *) skb->data;
906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
907
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
909 ieee80211_tx_skb(sdata, skb);
910 }
911
912 void ieee80211_send_nullfunc(struct ieee80211_local *local,
913 struct ieee80211_sub_if_data *sdata,
914 int powersave)
915 {
916 struct sk_buff *skb;
917 struct ieee80211_hdr_3addr *nullfunc;
918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
919
920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
921 if (!skb)
922 return;
923
924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
925 if (powersave)
926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
927
928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
930
931 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
933
934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
936
937 ieee80211_tx_skb(sdata, skb);
938 }
939
940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
941 struct ieee80211_sub_if_data *sdata)
942 {
943 struct sk_buff *skb;
944 struct ieee80211_hdr *nullfunc;
945 __le16 fc;
946
947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
948 return;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
951 if (!skb)
952 return;
953
954 skb_reserve(skb, local->hw.extra_tx_headroom);
955
956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
957 memset(nullfunc, 0, 30);
958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
960 nullfunc->frame_control = fc;
961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
965
966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
967 ieee80211_tx_skb(sdata, skb);
968 }
969
970 /* spectrum management related things */
971 static void ieee80211_chswitch_work(struct work_struct *work)
972 {
973 struct ieee80211_sub_if_data *sdata =
974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
977 int ret;
978
979 if (!ieee80211_sdata_running(sdata))
980 return;
981
982 sdata_lock(sdata);
983 mutex_lock(&local->mtx);
984 mutex_lock(&local->chanctx_mtx);
985
986 if (!ifmgd->associated)
987 goto out;
988
989 if (!sdata->vif.csa_active)
990 goto out;
991
992 /*
993 * using reservation isn't immediate as it may be deferred until later
994 * with multi-vif. once reservation is complete it will re-schedule the
995 * work with no reserved_chanctx so verify chandef to check if it
996 * completed successfully
997 */
998
999 if (sdata->reserved_chanctx) {
1000 /*
1001 * with multi-vif csa driver may call ieee80211_csa_finish()
1002 * many times while waiting for other interfaces to use their
1003 * reservations
1004 */
1005 if (sdata->reserved_ready)
1006 goto out;
1007
1008 ret = ieee80211_vif_use_reserved_context(sdata);
1009 if (ret) {
1010 sdata_info(sdata,
1011 "failed to use reserved channel context, disconnecting (err=%d)\n",
1012 ret);
1013 ieee80211_queue_work(&sdata->local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 goto out;
1016 }
1017
1018 goto out;
1019 }
1020
1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1022 &sdata->csa_chandef)) {
1023 sdata_info(sdata,
1024 "failed to finalize channel switch, disconnecting\n");
1025 ieee80211_queue_work(&sdata->local->hw,
1026 &ifmgd->csa_connection_drop_work);
1027 goto out;
1028 }
1029
1030 /* XXX: shouldn't really modify cfg80211-owned data! */
1031 ifmgd->associated->channel = sdata->csa_chandef.chan;
1032
1033 ifmgd->csa_waiting_bcn = true;
1034
1035 ieee80211_sta_reset_beacon_monitor(sdata);
1036 ieee80211_sta_reset_conn_monitor(sdata);
1037
1038 out:
1039 mutex_unlock(&local->chanctx_mtx);
1040 mutex_unlock(&local->mtx);
1041 sdata_unlock(sdata);
1042 }
1043
1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1045 {
1046 struct ieee80211_local *local = sdata->local;
1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1048 int ret;
1049
1050 sdata_assert_lock(sdata);
1051
1052 WARN_ON(!sdata->vif.csa_active);
1053
1054 if (sdata->csa_block_tx) {
1055 ieee80211_wake_vif_queues(local, sdata,
1056 IEEE80211_QUEUE_STOP_REASON_CSA);
1057 sdata->csa_block_tx = false;
1058 }
1059
1060 sdata->vif.csa_active = false;
1061 ifmgd->csa_waiting_bcn = false;
1062
1063 ret = drv_post_channel_switch(sdata);
1064 if (ret) {
1065 sdata_info(sdata,
1066 "driver post channel switch failed, disconnecting\n");
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1069 return;
1070 }
1071
1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1073 }
1074
1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1076 {
1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1079
1080 trace_api_chswitch_done(sdata, success);
1081 if (!success) {
1082 sdata_info(sdata,
1083 "driver channel switch failed, disconnecting\n");
1084 ieee80211_queue_work(&sdata->local->hw,
1085 &ifmgd->csa_connection_drop_work);
1086 } else {
1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1088 }
1089 }
1090 EXPORT_SYMBOL(ieee80211_chswitch_done);
1091
1092 static void ieee80211_chswitch_timer(unsigned long data)
1093 {
1094 struct ieee80211_sub_if_data *sdata =
1095 (struct ieee80211_sub_if_data *) data;
1096
1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1098 }
1099
1100 static void
1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1102 u64 timestamp, u32 device_timestamp,
1103 struct ieee802_11_elems *elems,
1104 bool beacon)
1105 {
1106 struct ieee80211_local *local = sdata->local;
1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1108 struct cfg80211_bss *cbss = ifmgd->associated;
1109 struct ieee80211_chanctx_conf *conf;
1110 struct ieee80211_chanctx *chanctx;
1111 enum ieee80211_band current_band;
1112 struct ieee80211_csa_ie csa_ie;
1113 struct ieee80211_channel_switch ch_switch;
1114 int res;
1115
1116 sdata_assert_lock(sdata);
1117
1118 if (!cbss)
1119 return;
1120
1121 if (local->scanning)
1122 return;
1123
1124 /* disregard subsequent announcements if we are already processing */
1125 if (sdata->vif.csa_active)
1126 return;
1127
1128 current_band = cbss->channel->band;
1129 memset(&csa_ie, 0, sizeof(csa_ie));
1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1131 ifmgd->flags,
1132 ifmgd->associated->bssid, &csa_ie);
1133 if (res < 0)
1134 ieee80211_queue_work(&local->hw,
1135 &ifmgd->csa_connection_drop_work);
1136 if (res)
1137 return;
1138
1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1140 IEEE80211_CHAN_DISABLED)) {
1141 sdata_info(sdata,
1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1143 ifmgd->associated->bssid,
1144 csa_ie.chandef.chan->center_freq,
1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1146 csa_ie.chandef.center_freq2);
1147 ieee80211_queue_work(&local->hw,
1148 &ifmgd->csa_connection_drop_work);
1149 return;
1150 }
1151
1152 mutex_lock(&local->mtx);
1153 mutex_lock(&local->chanctx_mtx);
1154 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1155 lockdep_is_held(&local->chanctx_mtx));
1156 if (!conf) {
1157 sdata_info(sdata,
1158 "no channel context assigned to vif?, disconnecting\n");
1159 ieee80211_queue_work(&local->hw,
1160 &ifmgd->csa_connection_drop_work);
1161 mutex_unlock(&local->chanctx_mtx);
1162 mutex_unlock(&local->mtx);
1163 return;
1164 }
1165
1166 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1167
1168 if (local->use_chanctx &&
1169 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1170 sdata_info(sdata,
1171 "driver doesn't support chan-switch with channel contexts\n");
1172 ieee80211_queue_work(&local->hw,
1173 &ifmgd->csa_connection_drop_work);
1174 mutex_unlock(&local->chanctx_mtx);
1175 mutex_unlock(&local->mtx);
1176 return;
1177 }
1178
1179 ch_switch.timestamp = timestamp;
1180 ch_switch.device_timestamp = device_timestamp;
1181 ch_switch.block_tx = csa_ie.mode;
1182 ch_switch.chandef = csa_ie.chandef;
1183 ch_switch.count = csa_ie.count;
1184
1185 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1186 sdata_info(sdata,
1187 "preparing for channel switch failed, disconnecting\n");
1188 ieee80211_queue_work(&local->hw,
1189 &ifmgd->csa_connection_drop_work);
1190 mutex_unlock(&local->chanctx_mtx);
1191 mutex_unlock(&local->mtx);
1192 return;
1193 }
1194
1195 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1196 chanctx->mode, false);
1197 if (res) {
1198 sdata_info(sdata,
1199 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1200 res);
1201 ieee80211_queue_work(&local->hw,
1202 &ifmgd->csa_connection_drop_work);
1203 mutex_unlock(&local->chanctx_mtx);
1204 mutex_unlock(&local->mtx);
1205 return;
1206 }
1207 mutex_unlock(&local->chanctx_mtx);
1208
1209 sdata->vif.csa_active = true;
1210 sdata->csa_chandef = csa_ie.chandef;
1211 sdata->csa_block_tx = csa_ie.mode;
1212
1213 if (sdata->csa_block_tx)
1214 ieee80211_stop_vif_queues(local, sdata,
1215 IEEE80211_QUEUE_STOP_REASON_CSA);
1216 mutex_unlock(&local->mtx);
1217
1218 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1219 csa_ie.count);
1220
1221 if (local->ops->channel_switch) {
1222 /* use driver's channel switch callback */
1223 drv_channel_switch(local, sdata, &ch_switch);
1224 return;
1225 }
1226
1227 /* channel switch handled in software */
1228 if (csa_ie.count <= 1)
1229 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1230 else
1231 mod_timer(&ifmgd->chswitch_timer,
1232 TU_TO_EXP_TIME((csa_ie.count - 1) *
1233 cbss->beacon_interval));
1234 }
1235
1236 static bool
1237 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1238 struct ieee80211_channel *channel,
1239 const u8 *country_ie, u8 country_ie_len,
1240 const u8 *pwr_constr_elem,
1241 int *chan_pwr, int *pwr_reduction)
1242 {
1243 struct ieee80211_country_ie_triplet *triplet;
1244 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1245 int i, chan_increment;
1246 bool have_chan_pwr = false;
1247
1248 /* Invalid IE */
1249 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1250 return false;
1251
1252 triplet = (void *)(country_ie + 3);
1253 country_ie_len -= 3;
1254
1255 switch (channel->band) {
1256 default:
1257 WARN_ON_ONCE(1);
1258 /* fall through */
1259 case IEEE80211_BAND_2GHZ:
1260 case IEEE80211_BAND_60GHZ:
1261 chan_increment = 1;
1262 break;
1263 case IEEE80211_BAND_5GHZ:
1264 chan_increment = 4;
1265 break;
1266 }
1267
1268 /* find channel */
1269 while (country_ie_len >= 3) {
1270 u8 first_channel = triplet->chans.first_channel;
1271
1272 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1273 goto next;
1274
1275 for (i = 0; i < triplet->chans.num_channels; i++) {
1276 if (first_channel + i * chan_increment == chan) {
1277 have_chan_pwr = true;
1278 *chan_pwr = triplet->chans.max_power;
1279 break;
1280 }
1281 }
1282 if (have_chan_pwr)
1283 break;
1284
1285 next:
1286 triplet++;
1287 country_ie_len -= 3;
1288 }
1289
1290 if (have_chan_pwr)
1291 *pwr_reduction = *pwr_constr_elem;
1292 return have_chan_pwr;
1293 }
1294
1295 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1296 struct ieee80211_channel *channel,
1297 const u8 *cisco_dtpc_ie,
1298 int *pwr_level)
1299 {
1300 /* From practical testing, the first data byte of the DTPC element
1301 * seems to contain the requested dBm level, and the CLI on Cisco
1302 * APs clearly state the range is -127 to 127 dBm, which indicates
1303 * a signed byte, although it seemingly never actually goes negative.
1304 * The other byte seems to always be zero.
1305 */
1306 *pwr_level = (__s8)cisco_dtpc_ie[4];
1307 }
1308
1309 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1310 struct ieee80211_channel *channel,
1311 struct ieee80211_mgmt *mgmt,
1312 const u8 *country_ie, u8 country_ie_len,
1313 const u8 *pwr_constr_ie,
1314 const u8 *cisco_dtpc_ie)
1315 {
1316 bool has_80211h_pwr = false, has_cisco_pwr = false;
1317 int chan_pwr = 0, pwr_reduction_80211h = 0;
1318 int pwr_level_cisco, pwr_level_80211h;
1319 int new_ap_level;
1320
1321 if (country_ie && pwr_constr_ie &&
1322 mgmt->u.probe_resp.capab_info &
1323 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1324 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1325 sdata, channel, country_ie, country_ie_len,
1326 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1327 pwr_level_80211h =
1328 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1329 }
1330
1331 if (cisco_dtpc_ie) {
1332 ieee80211_find_cisco_dtpc(
1333 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1334 has_cisco_pwr = true;
1335 }
1336
1337 if (!has_80211h_pwr && !has_cisco_pwr)
1338 return 0;
1339
1340 /* If we have both 802.11h and Cisco DTPC, apply both limits
1341 * by picking the smallest of the two power levels advertised.
1342 */
1343 if (has_80211h_pwr &&
1344 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1345 sdata_info(sdata,
1346 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1347 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1348 sdata->u.mgd.bssid);
1349 new_ap_level = pwr_level_80211h;
1350 } else { /* has_cisco_pwr is always true here. */
1351 sdata_info(sdata,
1352 "Limiting TX power to %d dBm as advertised by %pM\n",
1353 pwr_level_cisco, sdata->u.mgd.bssid);
1354 new_ap_level = pwr_level_cisco;
1355 }
1356
1357 if (sdata->ap_power_level == new_ap_level)
1358 return 0;
1359
1360 sdata->ap_power_level = new_ap_level;
1361 if (__ieee80211_recalc_txpower(sdata))
1362 return BSS_CHANGED_TXPOWER;
1363 return 0;
1364 }
1365
1366 /* powersave */
1367 static void ieee80211_enable_ps(struct ieee80211_local *local,
1368 struct ieee80211_sub_if_data *sdata)
1369 {
1370 struct ieee80211_conf *conf = &local->hw.conf;
1371
1372 /*
1373 * If we are scanning right now then the parameters will
1374 * take effect when scan finishes.
1375 */
1376 if (local->scanning)
1377 return;
1378
1379 if (conf->dynamic_ps_timeout > 0 &&
1380 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1381 mod_timer(&local->dynamic_ps_timer, jiffies +
1382 msecs_to_jiffies(conf->dynamic_ps_timeout));
1383 } else {
1384 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1385 ieee80211_send_nullfunc(local, sdata, 1);
1386
1387 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1388 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1389 return;
1390
1391 conf->flags |= IEEE80211_CONF_PS;
1392 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1393 }
1394 }
1395
1396 static void ieee80211_change_ps(struct ieee80211_local *local)
1397 {
1398 struct ieee80211_conf *conf = &local->hw.conf;
1399
1400 if (local->ps_sdata) {
1401 ieee80211_enable_ps(local, local->ps_sdata);
1402 } else if (conf->flags & IEEE80211_CONF_PS) {
1403 conf->flags &= ~IEEE80211_CONF_PS;
1404 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1405 del_timer_sync(&local->dynamic_ps_timer);
1406 cancel_work_sync(&local->dynamic_ps_enable_work);
1407 }
1408 }
1409
1410 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1411 {
1412 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1413 struct sta_info *sta = NULL;
1414 bool authorized = false;
1415
1416 if (!mgd->powersave)
1417 return false;
1418
1419 if (mgd->broken_ap)
1420 return false;
1421
1422 if (!mgd->associated)
1423 return false;
1424
1425 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1426 return false;
1427
1428 if (!mgd->have_beacon)
1429 return false;
1430
1431 rcu_read_lock();
1432 sta = sta_info_get(sdata, mgd->bssid);
1433 if (sta)
1434 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1435 rcu_read_unlock();
1436
1437 return authorized;
1438 }
1439
1440 /* need to hold RTNL or interface lock */
1441 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1442 {
1443 struct ieee80211_sub_if_data *sdata, *found = NULL;
1444 int count = 0;
1445 int timeout;
1446
1447 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1448 local->ps_sdata = NULL;
1449 return;
1450 }
1451
1452 list_for_each_entry(sdata, &local->interfaces, list) {
1453 if (!ieee80211_sdata_running(sdata))
1454 continue;
1455 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1456 /* If an AP vif is found, then disable PS
1457 * by setting the count to zero thereby setting
1458 * ps_sdata to NULL.
1459 */
1460 count = 0;
1461 break;
1462 }
1463 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1464 continue;
1465 found = sdata;
1466 count++;
1467 }
1468
1469 if (count == 1 && ieee80211_powersave_allowed(found)) {
1470 s32 beaconint_us;
1471
1472 if (latency < 0)
1473 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1474
1475 beaconint_us = ieee80211_tu_to_usec(
1476 found->vif.bss_conf.beacon_int);
1477
1478 timeout = local->dynamic_ps_forced_timeout;
1479 if (timeout < 0) {
1480 /*
1481 * Go to full PSM if the user configures a very low
1482 * latency requirement.
1483 * The 2000 second value is there for compatibility
1484 * until the PM_QOS_NETWORK_LATENCY is configured
1485 * with real values.
1486 */
1487 if (latency > (1900 * USEC_PER_MSEC) &&
1488 latency != (2000 * USEC_PER_SEC))
1489 timeout = 0;
1490 else
1491 timeout = 100;
1492 }
1493 local->hw.conf.dynamic_ps_timeout = timeout;
1494
1495 if (beaconint_us > latency) {
1496 local->ps_sdata = NULL;
1497 } else {
1498 int maxslp = 1;
1499 u8 dtimper = found->u.mgd.dtim_period;
1500
1501 /* If the TIM IE is invalid, pretend the value is 1 */
1502 if (!dtimper)
1503 dtimper = 1;
1504 else if (dtimper > 1)
1505 maxslp = min_t(int, dtimper,
1506 latency / beaconint_us);
1507
1508 local->hw.conf.max_sleep_period = maxslp;
1509 local->hw.conf.ps_dtim_period = dtimper;
1510 local->ps_sdata = found;
1511 }
1512 } else {
1513 local->ps_sdata = NULL;
1514 }
1515
1516 ieee80211_change_ps(local);
1517 }
1518
1519 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1520 {
1521 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1522
1523 if (sdata->vif.bss_conf.ps != ps_allowed) {
1524 sdata->vif.bss_conf.ps = ps_allowed;
1525 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1526 }
1527 }
1528
1529 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1530 {
1531 struct ieee80211_local *local =
1532 container_of(work, struct ieee80211_local,
1533 dynamic_ps_disable_work);
1534
1535 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1536 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1537 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1538 }
1539
1540 ieee80211_wake_queues_by_reason(&local->hw,
1541 IEEE80211_MAX_QUEUE_MAP,
1542 IEEE80211_QUEUE_STOP_REASON_PS,
1543 false);
1544 }
1545
1546 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1547 {
1548 struct ieee80211_local *local =
1549 container_of(work, struct ieee80211_local,
1550 dynamic_ps_enable_work);
1551 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1552 struct ieee80211_if_managed *ifmgd;
1553 unsigned long flags;
1554 int q;
1555
1556 /* can only happen when PS was just disabled anyway */
1557 if (!sdata)
1558 return;
1559
1560 ifmgd = &sdata->u.mgd;
1561
1562 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1563 return;
1564
1565 if (local->hw.conf.dynamic_ps_timeout > 0) {
1566 /* don't enter PS if TX frames are pending */
1567 if (drv_tx_frames_pending(local)) {
1568 mod_timer(&local->dynamic_ps_timer, jiffies +
1569 msecs_to_jiffies(
1570 local->hw.conf.dynamic_ps_timeout));
1571 return;
1572 }
1573
1574 /*
1575 * transmission can be stopped by others which leads to
1576 * dynamic_ps_timer expiry. Postpone the ps timer if it
1577 * is not the actual idle state.
1578 */
1579 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1580 for (q = 0; q < local->hw.queues; q++) {
1581 if (local->queue_stop_reasons[q]) {
1582 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1583 flags);
1584 mod_timer(&local->dynamic_ps_timer, jiffies +
1585 msecs_to_jiffies(
1586 local->hw.conf.dynamic_ps_timeout));
1587 return;
1588 }
1589 }
1590 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1591 }
1592
1593 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1594 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1595 if (drv_tx_frames_pending(local)) {
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 } else {
1600 ieee80211_send_nullfunc(local, sdata, 1);
1601 /* Flush to get the tx status of nullfunc frame */
1602 ieee80211_flush_queues(local, sdata);
1603 }
1604 }
1605
1606 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1607 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1608 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1609 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1610 local->hw.conf.flags |= IEEE80211_CONF_PS;
1611 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1612 }
1613 }
1614
1615 void ieee80211_dynamic_ps_timer(unsigned long data)
1616 {
1617 struct ieee80211_local *local = (void *) data;
1618
1619 if (local->quiescing || local->suspended)
1620 return;
1621
1622 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1623 }
1624
1625 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1626 {
1627 struct delayed_work *delayed_work =
1628 container_of(work, struct delayed_work, work);
1629 struct ieee80211_sub_if_data *sdata =
1630 container_of(delayed_work, struct ieee80211_sub_if_data,
1631 dfs_cac_timer_work);
1632 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1633
1634 mutex_lock(&sdata->local->mtx);
1635 if (sdata->wdev.cac_started) {
1636 ieee80211_vif_release_channel(sdata);
1637 cfg80211_cac_event(sdata->dev, &chandef,
1638 NL80211_RADAR_CAC_FINISHED,
1639 GFP_KERNEL);
1640 }
1641 mutex_unlock(&sdata->local->mtx);
1642 }
1643
1644 static bool
1645 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1646 {
1647 struct ieee80211_local *local = sdata->local;
1648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1649 bool ret;
1650 int ac;
1651
1652 if (local->hw.queues < IEEE80211_NUM_ACS)
1653 return false;
1654
1655 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1656 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1657 int non_acm_ac;
1658 unsigned long now = jiffies;
1659
1660 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1661 tx_tspec->admitted_time &&
1662 time_after(now, tx_tspec->time_slice_start + HZ)) {
1663 tx_tspec->consumed_tx_time = 0;
1664 tx_tspec->time_slice_start = now;
1665
1666 if (tx_tspec->downgraded)
1667 tx_tspec->action =
1668 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1669 }
1670
1671 switch (tx_tspec->action) {
1672 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1673 /* take the original parameters */
1674 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1675 sdata_err(sdata,
1676 "failed to set TX queue parameters for queue %d\n",
1677 ac);
1678 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1679 tx_tspec->downgraded = false;
1680 ret = true;
1681 break;
1682 case TX_TSPEC_ACTION_DOWNGRADE:
1683 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1684 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1685 ret = true;
1686 break;
1687 }
1688 /* downgrade next lower non-ACM AC */
1689 for (non_acm_ac = ac + 1;
1690 non_acm_ac < IEEE80211_NUM_ACS;
1691 non_acm_ac++)
1692 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1693 break;
1694 /* The loop will result in using BK even if it requires
1695 * admission control, such configuration makes no sense
1696 * and we have to transmit somehow - the AC selection
1697 * does the same thing.
1698 */
1699 if (drv_conf_tx(local, sdata, ac,
1700 &sdata->tx_conf[non_acm_ac]))
1701 sdata_err(sdata,
1702 "failed to set TX queue parameters for queue %d\n",
1703 ac);
1704 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1705 ret = true;
1706 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1707 tx_tspec->time_slice_start + HZ - now + 1);
1708 break;
1709 case TX_TSPEC_ACTION_NONE:
1710 /* nothing now */
1711 break;
1712 }
1713 }
1714
1715 return ret;
1716 }
1717
1718 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1719 {
1720 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1721 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1722 }
1723
1724 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1725 {
1726 struct ieee80211_sub_if_data *sdata;
1727
1728 sdata = container_of(work, struct ieee80211_sub_if_data,
1729 u.mgd.tx_tspec_wk.work);
1730 ieee80211_sta_handle_tspec_ac_params(sdata);
1731 }
1732
1733 /* MLME */
1734 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1735 struct ieee80211_sub_if_data *sdata,
1736 const u8 *wmm_param, size_t wmm_param_len)
1737 {
1738 struct ieee80211_tx_queue_params params;
1739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1740 size_t left;
1741 int count;
1742 const u8 *pos;
1743 u8 uapsd_queues = 0;
1744
1745 if (!local->ops->conf_tx)
1746 return false;
1747
1748 if (local->hw.queues < IEEE80211_NUM_ACS)
1749 return false;
1750
1751 if (!wmm_param)
1752 return false;
1753
1754 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1755 return false;
1756
1757 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1758 uapsd_queues = ifmgd->uapsd_queues;
1759
1760 count = wmm_param[6] & 0x0f;
1761 if (count == ifmgd->wmm_last_param_set)
1762 return false;
1763 ifmgd->wmm_last_param_set = count;
1764
1765 pos = wmm_param + 8;
1766 left = wmm_param_len - 8;
1767
1768 memset(&params, 0, sizeof(params));
1769
1770 sdata->wmm_acm = 0;
1771 for (; left >= 4; left -= 4, pos += 4) {
1772 int aci = (pos[0] >> 5) & 0x03;
1773 int acm = (pos[0] >> 4) & 0x01;
1774 bool uapsd = false;
1775 int queue;
1776
1777 switch (aci) {
1778 case 1: /* AC_BK */
1779 queue = 3;
1780 if (acm)
1781 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1782 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1783 uapsd = true;
1784 break;
1785 case 2: /* AC_VI */
1786 queue = 1;
1787 if (acm)
1788 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1789 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1790 uapsd = true;
1791 break;
1792 case 3: /* AC_VO */
1793 queue = 0;
1794 if (acm)
1795 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1796 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1797 uapsd = true;
1798 break;
1799 case 0: /* AC_BE */
1800 default:
1801 queue = 2;
1802 if (acm)
1803 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1804 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1805 uapsd = true;
1806 break;
1807 }
1808
1809 params.aifs = pos[0] & 0x0f;
1810 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1811 params.cw_min = ecw2cw(pos[1] & 0x0f);
1812 params.txop = get_unaligned_le16(pos + 2);
1813 params.acm = acm;
1814 params.uapsd = uapsd;
1815
1816 mlme_dbg(sdata,
1817 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1818 queue, aci, acm,
1819 params.aifs, params.cw_min, params.cw_max,
1820 params.txop, params.uapsd,
1821 ifmgd->tx_tspec[queue].downgraded);
1822 sdata->tx_conf[queue] = params;
1823 if (!ifmgd->tx_tspec[queue].downgraded &&
1824 drv_conf_tx(local, sdata, queue, &params))
1825 sdata_err(sdata,
1826 "failed to set TX queue parameters for queue %d\n",
1827 queue);
1828 }
1829
1830 /* enable WMM or activate new settings */
1831 sdata->vif.bss_conf.qos = true;
1832 return true;
1833 }
1834
1835 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1836 {
1837 lockdep_assert_held(&sdata->local->mtx);
1838
1839 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1840 ieee80211_run_deferred_scan(sdata->local);
1841 }
1842
1843 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1844 {
1845 mutex_lock(&sdata->local->mtx);
1846 __ieee80211_stop_poll(sdata);
1847 mutex_unlock(&sdata->local->mtx);
1848 }
1849
1850 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1851 u16 capab, bool erp_valid, u8 erp)
1852 {
1853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1854 u32 changed = 0;
1855 bool use_protection;
1856 bool use_short_preamble;
1857 bool use_short_slot;
1858
1859 if (erp_valid) {
1860 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1861 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1862 } else {
1863 use_protection = false;
1864 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1865 }
1866
1867 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1868 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1869 use_short_slot = true;
1870
1871 if (use_protection != bss_conf->use_cts_prot) {
1872 bss_conf->use_cts_prot = use_protection;
1873 changed |= BSS_CHANGED_ERP_CTS_PROT;
1874 }
1875
1876 if (use_short_preamble != bss_conf->use_short_preamble) {
1877 bss_conf->use_short_preamble = use_short_preamble;
1878 changed |= BSS_CHANGED_ERP_PREAMBLE;
1879 }
1880
1881 if (use_short_slot != bss_conf->use_short_slot) {
1882 bss_conf->use_short_slot = use_short_slot;
1883 changed |= BSS_CHANGED_ERP_SLOT;
1884 }
1885
1886 return changed;
1887 }
1888
1889 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1890 struct cfg80211_bss *cbss,
1891 u32 bss_info_changed)
1892 {
1893 struct ieee80211_bss *bss = (void *)cbss->priv;
1894 struct ieee80211_local *local = sdata->local;
1895 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1896
1897 bss_info_changed |= BSS_CHANGED_ASSOC;
1898 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1899 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1900
1901 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1902 beacon_loss_count * bss_conf->beacon_int));
1903
1904 sdata->u.mgd.associated = cbss;
1905 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1906
1907 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1908
1909 if (sdata->vif.p2p) {
1910 const struct cfg80211_bss_ies *ies;
1911
1912 rcu_read_lock();
1913 ies = rcu_dereference(cbss->ies);
1914 if (ies) {
1915 int ret;
1916
1917 ret = cfg80211_get_p2p_attr(
1918 ies->data, ies->len,
1919 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1920 (u8 *) &bss_conf->p2p_noa_attr,
1921 sizeof(bss_conf->p2p_noa_attr));
1922 if (ret >= 2) {
1923 sdata->u.mgd.p2p_noa_index =
1924 bss_conf->p2p_noa_attr.index;
1925 bss_info_changed |= BSS_CHANGED_P2P_PS;
1926 }
1927 }
1928 rcu_read_unlock();
1929 }
1930
1931 /* just to be sure */
1932 ieee80211_stop_poll(sdata);
1933
1934 ieee80211_led_assoc(local, 1);
1935
1936 if (sdata->u.mgd.have_beacon) {
1937 /*
1938 * If the AP is buggy we may get here with no DTIM period
1939 * known, so assume it's 1 which is the only safe assumption
1940 * in that case, although if the TIM IE is broken powersave
1941 * probably just won't work at all.
1942 */
1943 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1944 bss_conf->beacon_rate = bss->beacon_rate;
1945 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1946 } else {
1947 bss_conf->beacon_rate = NULL;
1948 bss_conf->dtim_period = 0;
1949 }
1950
1951 bss_conf->assoc = 1;
1952
1953 /* Tell the driver to monitor connection quality (if supported) */
1954 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1955 bss_conf->cqm_rssi_thold)
1956 bss_info_changed |= BSS_CHANGED_CQM;
1957
1958 /* Enable ARP filtering */
1959 if (bss_conf->arp_addr_cnt)
1960 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1961
1962 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1963
1964 mutex_lock(&local->iflist_mtx);
1965 ieee80211_recalc_ps(local, -1);
1966 mutex_unlock(&local->iflist_mtx);
1967
1968 ieee80211_recalc_smps(sdata);
1969 ieee80211_recalc_ps_vif(sdata);
1970
1971 netif_carrier_on(sdata->dev);
1972 }
1973
1974 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1975 u16 stype, u16 reason, bool tx,
1976 u8 *frame_buf)
1977 {
1978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1979 struct ieee80211_local *local = sdata->local;
1980 u32 changed = 0;
1981
1982 sdata_assert_lock(sdata);
1983
1984 if (WARN_ON_ONCE(tx && !frame_buf))
1985 return;
1986
1987 if (WARN_ON(!ifmgd->associated))
1988 return;
1989
1990 ieee80211_stop_poll(sdata);
1991
1992 ifmgd->associated = NULL;
1993 netif_carrier_off(sdata->dev);
1994
1995 /*
1996 * if we want to get out of ps before disassoc (why?) we have
1997 * to do it before sending disassoc, as otherwise the null-packet
1998 * won't be valid.
1999 */
2000 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2001 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2002 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2003 }
2004 local->ps_sdata = NULL;
2005
2006 /* disable per-vif ps */
2007 ieee80211_recalc_ps_vif(sdata);
2008
2009 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2010 if (tx)
2011 ieee80211_flush_queues(local, sdata);
2012
2013 /* deauthenticate/disassociate now */
2014 if (tx || frame_buf)
2015 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2016 reason, tx, frame_buf);
2017
2018 /* flush out frame */
2019 if (tx)
2020 ieee80211_flush_queues(local, sdata);
2021
2022 /* clear bssid only after building the needed mgmt frames */
2023 memset(ifmgd->bssid, 0, ETH_ALEN);
2024
2025 /* remove AP and TDLS peers */
2026 sta_info_flush(sdata);
2027
2028 /* finally reset all BSS / config parameters */
2029 changed |= ieee80211_reset_erp_info(sdata);
2030
2031 ieee80211_led_assoc(local, 0);
2032 changed |= BSS_CHANGED_ASSOC;
2033 sdata->vif.bss_conf.assoc = false;
2034
2035 ifmgd->p2p_noa_index = -1;
2036 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2037 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2038
2039 /* on the next assoc, re-program HT/VHT parameters */
2040 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2041 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2042 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2043 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2044
2045 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2046
2047 del_timer_sync(&local->dynamic_ps_timer);
2048 cancel_work_sync(&local->dynamic_ps_enable_work);
2049
2050 /* Disable ARP filtering */
2051 if (sdata->vif.bss_conf.arp_addr_cnt)
2052 changed |= BSS_CHANGED_ARP_FILTER;
2053
2054 sdata->vif.bss_conf.qos = false;
2055 changed |= BSS_CHANGED_QOS;
2056
2057 /* The BSSID (not really interesting) and HT changed */
2058 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2059 ieee80211_bss_info_change_notify(sdata, changed);
2060
2061 /* disassociated - set to defaults now */
2062 ieee80211_set_wmm_default(sdata, false);
2063
2064 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2065 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2066 del_timer_sync(&sdata->u.mgd.timer);
2067 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2068
2069 sdata->vif.bss_conf.dtim_period = 0;
2070 sdata->vif.bss_conf.beacon_rate = NULL;
2071
2072 ifmgd->have_beacon = false;
2073
2074 ifmgd->flags = 0;
2075 mutex_lock(&local->mtx);
2076 ieee80211_vif_release_channel(sdata);
2077
2078 sdata->vif.csa_active = false;
2079 ifmgd->csa_waiting_bcn = false;
2080 if (sdata->csa_block_tx) {
2081 ieee80211_wake_vif_queues(local, sdata,
2082 IEEE80211_QUEUE_STOP_REASON_CSA);
2083 sdata->csa_block_tx = false;
2084 }
2085 mutex_unlock(&local->mtx);
2086
2087 /* existing TX TSPEC sessions no longer exist */
2088 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2089 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2090
2091 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2092 }
2093
2094 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2095 struct ieee80211_hdr *hdr)
2096 {
2097 /*
2098 * We can postpone the mgd.timer whenever receiving unicast frames
2099 * from AP because we know that the connection is working both ways
2100 * at that time. But multicast frames (and hence also beacons) must
2101 * be ignored here, because we need to trigger the timer during
2102 * data idle periods for sending the periodic probe request to the
2103 * AP we're connected to.
2104 */
2105 if (is_multicast_ether_addr(hdr->addr1))
2106 return;
2107
2108 ieee80211_sta_reset_conn_monitor(sdata);
2109 }
2110
2111 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2112 {
2113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2114 struct ieee80211_local *local = sdata->local;
2115
2116 mutex_lock(&local->mtx);
2117 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2118 goto out;
2119
2120 __ieee80211_stop_poll(sdata);
2121
2122 mutex_lock(&local->iflist_mtx);
2123 ieee80211_recalc_ps(local, -1);
2124 mutex_unlock(&local->iflist_mtx);
2125
2126 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2127 goto out;
2128
2129 /*
2130 * We've received a probe response, but are not sure whether
2131 * we have or will be receiving any beacons or data, so let's
2132 * schedule the timers again, just in case.
2133 */
2134 ieee80211_sta_reset_beacon_monitor(sdata);
2135
2136 mod_timer(&ifmgd->conn_mon_timer,
2137 round_jiffies_up(jiffies +
2138 IEEE80211_CONNECTION_IDLE_TIME));
2139 out:
2140 mutex_unlock(&local->mtx);
2141 }
2142
2143 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2144 struct ieee80211_hdr *hdr,
2145 u16 tx_time)
2146 {
2147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2148 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2149 int ac = ieee80211_ac_from_tid(tid);
2150 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2151 unsigned long now = jiffies;
2152
2153 if (likely(!tx_tspec->admitted_time))
2154 return;
2155
2156 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2157 tx_tspec->consumed_tx_time = 0;
2158 tx_tspec->time_slice_start = now;
2159
2160 if (tx_tspec->downgraded) {
2161 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2162 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2163 }
2164 }
2165
2166 if (tx_tspec->downgraded)
2167 return;
2168
2169 tx_tspec->consumed_tx_time += tx_time;
2170
2171 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2172 tx_tspec->downgraded = true;
2173 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2174 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2175 }
2176 }
2177
2178 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2179 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2180 {
2181 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2182
2183 if (!ieee80211_is_data(hdr->frame_control))
2184 return;
2185
2186 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2187 sdata->u.mgd.probe_send_count > 0) {
2188 if (ack)
2189 ieee80211_sta_reset_conn_monitor(sdata);
2190 else
2191 sdata->u.mgd.nullfunc_failed = true;
2192 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2193 return;
2194 }
2195
2196 if (ack)
2197 ieee80211_sta_reset_conn_monitor(sdata);
2198 }
2199
2200 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2201 {
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 const u8 *ssid;
2204 u8 *dst = ifmgd->associated->bssid;
2205 u8 unicast_limit = max(1, max_probe_tries - 3);
2206
2207 /*
2208 * Try sending broadcast probe requests for the last three
2209 * probe requests after the first ones failed since some
2210 * buggy APs only support broadcast probe requests.
2211 */
2212 if (ifmgd->probe_send_count >= unicast_limit)
2213 dst = NULL;
2214
2215 /*
2216 * When the hardware reports an accurate Tx ACK status, it's
2217 * better to send a nullfunc frame instead of a probe request,
2218 * as it will kick us off the AP quickly if we aren't associated
2219 * anymore. The timeout will be reset if the frame is ACKed by
2220 * the AP.
2221 */
2222 ifmgd->probe_send_count++;
2223
2224 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2225 ifmgd->nullfunc_failed = false;
2226 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2227 } else {
2228 int ssid_len;
2229
2230 rcu_read_lock();
2231 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2232 if (WARN_ON_ONCE(ssid == NULL))
2233 ssid_len = 0;
2234 else
2235 ssid_len = ssid[1];
2236
2237 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2238 ssid + 2, ssid_len, NULL,
2239 0, (u32) -1, true, 0,
2240 ifmgd->associated->channel, false);
2241 rcu_read_unlock();
2242 }
2243
2244 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2245 run_again(sdata, ifmgd->probe_timeout);
2246 }
2247
2248 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2249 bool beacon)
2250 {
2251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2252 bool already = false;
2253
2254 if (!ieee80211_sdata_running(sdata))
2255 return;
2256
2257 sdata_lock(sdata);
2258
2259 if (!ifmgd->associated)
2260 goto out;
2261
2262 mutex_lock(&sdata->local->mtx);
2263
2264 if (sdata->local->tmp_channel || sdata->local->scanning) {
2265 mutex_unlock(&sdata->local->mtx);
2266 goto out;
2267 }
2268
2269 if (beacon) {
2270 mlme_dbg_ratelimited(sdata,
2271 "detected beacon loss from AP (missed %d beacons) - probing\n",
2272 beacon_loss_count);
2273
2274 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2275 }
2276
2277 /*
2278 * The driver/our work has already reported this event or the
2279 * connection monitoring has kicked in and we have already sent
2280 * a probe request. Or maybe the AP died and the driver keeps
2281 * reporting until we disassociate...
2282 *
2283 * In either case we have to ignore the current call to this
2284 * function (except for setting the correct probe reason bit)
2285 * because otherwise we would reset the timer every time and
2286 * never check whether we received a probe response!
2287 */
2288 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2289 already = true;
2290
2291 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2292
2293 mutex_unlock(&sdata->local->mtx);
2294
2295 if (already)
2296 goto out;
2297
2298 mutex_lock(&sdata->local->iflist_mtx);
2299 ieee80211_recalc_ps(sdata->local, -1);
2300 mutex_unlock(&sdata->local->iflist_mtx);
2301
2302 ifmgd->probe_send_count = 0;
2303 ieee80211_mgd_probe_ap_send(sdata);
2304 out:
2305 sdata_unlock(sdata);
2306 }
2307
2308 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2309 struct ieee80211_vif *vif)
2310 {
2311 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2313 struct cfg80211_bss *cbss;
2314 struct sk_buff *skb;
2315 const u8 *ssid;
2316 int ssid_len;
2317
2318 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2319 return NULL;
2320
2321 sdata_assert_lock(sdata);
2322
2323 if (ifmgd->associated)
2324 cbss = ifmgd->associated;
2325 else if (ifmgd->auth_data)
2326 cbss = ifmgd->auth_data->bss;
2327 else if (ifmgd->assoc_data)
2328 cbss = ifmgd->assoc_data->bss;
2329 else
2330 return NULL;
2331
2332 rcu_read_lock();
2333 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2334 if (WARN_ON_ONCE(ssid == NULL))
2335 ssid_len = 0;
2336 else
2337 ssid_len = ssid[1];
2338
2339 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2340 (u32) -1, cbss->channel,
2341 ssid + 2, ssid_len,
2342 NULL, 0, true);
2343 rcu_read_unlock();
2344
2345 return skb;
2346 }
2347 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2348
2349 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2350 {
2351 struct ieee80211_local *local = sdata->local;
2352 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2353 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2354
2355 sdata_lock(sdata);
2356 if (!ifmgd->associated) {
2357 sdata_unlock(sdata);
2358 return;
2359 }
2360
2361 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2362 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2363 true, frame_buf);
2364 mutex_lock(&local->mtx);
2365 sdata->vif.csa_active = false;
2366 ifmgd->csa_waiting_bcn = false;
2367 if (sdata->csa_block_tx) {
2368 ieee80211_wake_vif_queues(local, sdata,
2369 IEEE80211_QUEUE_STOP_REASON_CSA);
2370 sdata->csa_block_tx = false;
2371 }
2372 mutex_unlock(&local->mtx);
2373
2374 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2375 IEEE80211_DEAUTH_FRAME_LEN);
2376 sdata_unlock(sdata);
2377 }
2378
2379 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2380 {
2381 struct ieee80211_sub_if_data *sdata =
2382 container_of(work, struct ieee80211_sub_if_data,
2383 u.mgd.beacon_connection_loss_work);
2384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2385 struct sta_info *sta;
2386
2387 if (ifmgd->associated) {
2388 rcu_read_lock();
2389 sta = sta_info_get(sdata, ifmgd->bssid);
2390 if (sta)
2391 sta->beacon_loss_count++;
2392 rcu_read_unlock();
2393 }
2394
2395 if (ifmgd->connection_loss) {
2396 sdata_info(sdata, "Connection to AP %pM lost\n",
2397 ifmgd->bssid);
2398 __ieee80211_disconnect(sdata);
2399 } else {
2400 ieee80211_mgd_probe_ap(sdata, true);
2401 }
2402 }
2403
2404 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2405 {
2406 struct ieee80211_sub_if_data *sdata =
2407 container_of(work, struct ieee80211_sub_if_data,
2408 u.mgd.csa_connection_drop_work);
2409
2410 __ieee80211_disconnect(sdata);
2411 }
2412
2413 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2414 {
2415 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2416 struct ieee80211_hw *hw = &sdata->local->hw;
2417
2418 trace_api_beacon_loss(sdata);
2419
2420 sdata->u.mgd.connection_loss = false;
2421 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2422 }
2423 EXPORT_SYMBOL(ieee80211_beacon_loss);
2424
2425 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2426 {
2427 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2428 struct ieee80211_hw *hw = &sdata->local->hw;
2429
2430 trace_api_connection_loss(sdata);
2431
2432 sdata->u.mgd.connection_loss = true;
2433 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2434 }
2435 EXPORT_SYMBOL(ieee80211_connection_loss);
2436
2437
2438 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2439 bool assoc)
2440 {
2441 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2442
2443 sdata_assert_lock(sdata);
2444
2445 if (!assoc) {
2446 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2447
2448 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2449 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2450 sdata->u.mgd.flags = 0;
2451 mutex_lock(&sdata->local->mtx);
2452 ieee80211_vif_release_channel(sdata);
2453 mutex_unlock(&sdata->local->mtx);
2454 }
2455
2456 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2457 kfree(auth_data);
2458 sdata->u.mgd.auth_data = NULL;
2459 }
2460
2461 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2462 struct ieee80211_mgmt *mgmt, size_t len)
2463 {
2464 struct ieee80211_local *local = sdata->local;
2465 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2466 u8 *pos;
2467 struct ieee802_11_elems elems;
2468 u32 tx_flags = 0;
2469
2470 pos = mgmt->u.auth.variable;
2471 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2472 if (!elems.challenge)
2473 return;
2474 auth_data->expected_transaction = 4;
2475 drv_mgd_prepare_tx(sdata->local, sdata);
2476 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2477 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2478 IEEE80211_TX_INTFL_MLME_CONN_TX;
2479 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2480 elems.challenge - 2, elems.challenge_len + 2,
2481 auth_data->bss->bssid, auth_data->bss->bssid,
2482 auth_data->key, auth_data->key_len,
2483 auth_data->key_idx, tx_flags);
2484 }
2485
2486 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2487 struct ieee80211_mgmt *mgmt, size_t len)
2488 {
2489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2490 u8 bssid[ETH_ALEN];
2491 u16 auth_alg, auth_transaction, status_code;
2492 struct sta_info *sta;
2493
2494 sdata_assert_lock(sdata);
2495
2496 if (len < 24 + 6)
2497 return;
2498
2499 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2500 return;
2501
2502 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2503
2504 if (!ether_addr_equal(bssid, mgmt->bssid))
2505 return;
2506
2507 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2508 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2509 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2510
2511 if (auth_alg != ifmgd->auth_data->algorithm ||
2512 auth_transaction != ifmgd->auth_data->expected_transaction) {
2513 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2514 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2515 auth_transaction,
2516 ifmgd->auth_data->expected_transaction);
2517 return;
2518 }
2519
2520 if (status_code != WLAN_STATUS_SUCCESS) {
2521 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2522 mgmt->sa, status_code);
2523 ieee80211_destroy_auth_data(sdata, false);
2524 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2525 return;
2526 }
2527
2528 switch (ifmgd->auth_data->algorithm) {
2529 case WLAN_AUTH_OPEN:
2530 case WLAN_AUTH_LEAP:
2531 case WLAN_AUTH_FT:
2532 case WLAN_AUTH_SAE:
2533 break;
2534 case WLAN_AUTH_SHARED_KEY:
2535 if (ifmgd->auth_data->expected_transaction != 4) {
2536 ieee80211_auth_challenge(sdata, mgmt, len);
2537 /* need another frame */
2538 return;
2539 }
2540 break;
2541 default:
2542 WARN_ONCE(1, "invalid auth alg %d",
2543 ifmgd->auth_data->algorithm);
2544 return;
2545 }
2546
2547 sdata_info(sdata, "authenticated\n");
2548 ifmgd->auth_data->done = true;
2549 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2550 ifmgd->auth_data->timeout_started = true;
2551 run_again(sdata, ifmgd->auth_data->timeout);
2552
2553 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2554 ifmgd->auth_data->expected_transaction != 2) {
2555 /*
2556 * Report auth frame to user space for processing since another
2557 * round of Authentication frames is still needed.
2558 */
2559 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2560 return;
2561 }
2562
2563 /* move station state to auth */
2564 mutex_lock(&sdata->local->sta_mtx);
2565 sta = sta_info_get(sdata, bssid);
2566 if (!sta) {
2567 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2568 goto out_err;
2569 }
2570 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2571 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2572 goto out_err;
2573 }
2574 mutex_unlock(&sdata->local->sta_mtx);
2575
2576 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2577 return;
2578 out_err:
2579 mutex_unlock(&sdata->local->sta_mtx);
2580 /* ignore frame -- wait for timeout */
2581 }
2582
2583 #define case_WLAN(type) \
2584 case WLAN_REASON_##type: return #type
2585
2586 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2587 {
2588 switch (reason_code) {
2589 case_WLAN(UNSPECIFIED);
2590 case_WLAN(PREV_AUTH_NOT_VALID);
2591 case_WLAN(DEAUTH_LEAVING);
2592 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2593 case_WLAN(DISASSOC_AP_BUSY);
2594 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2595 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2596 case_WLAN(DISASSOC_STA_HAS_LEFT);
2597 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2598 case_WLAN(DISASSOC_BAD_POWER);
2599 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2600 case_WLAN(INVALID_IE);
2601 case_WLAN(MIC_FAILURE);
2602 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2603 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2604 case_WLAN(IE_DIFFERENT);
2605 case_WLAN(INVALID_GROUP_CIPHER);
2606 case_WLAN(INVALID_PAIRWISE_CIPHER);
2607 case_WLAN(INVALID_AKMP);
2608 case_WLAN(UNSUPP_RSN_VERSION);
2609 case_WLAN(INVALID_RSN_IE_CAP);
2610 case_WLAN(IEEE8021X_FAILED);
2611 case_WLAN(CIPHER_SUITE_REJECTED);
2612 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2613 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2614 case_WLAN(DISASSOC_LOW_ACK);
2615 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2616 case_WLAN(QSTA_LEAVE_QBSS);
2617 case_WLAN(QSTA_NOT_USE);
2618 case_WLAN(QSTA_REQUIRE_SETUP);
2619 case_WLAN(QSTA_TIMEOUT);
2620 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2621 case_WLAN(MESH_PEER_CANCELED);
2622 case_WLAN(MESH_MAX_PEERS);
2623 case_WLAN(MESH_CONFIG);
2624 case_WLAN(MESH_CLOSE);
2625 case_WLAN(MESH_MAX_RETRIES);
2626 case_WLAN(MESH_CONFIRM_TIMEOUT);
2627 case_WLAN(MESH_INVALID_GTK);
2628 case_WLAN(MESH_INCONSISTENT_PARAM);
2629 case_WLAN(MESH_INVALID_SECURITY);
2630 case_WLAN(MESH_PATH_ERROR);
2631 case_WLAN(MESH_PATH_NOFORWARD);
2632 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2633 case_WLAN(MAC_EXISTS_IN_MBSS);
2634 case_WLAN(MESH_CHAN_REGULATORY);
2635 case_WLAN(MESH_CHAN);
2636 default: return "<unknown>";
2637 }
2638 }
2639
2640 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2641 struct ieee80211_mgmt *mgmt, size_t len)
2642 {
2643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2644 const u8 *bssid = NULL;
2645 u16 reason_code;
2646
2647 sdata_assert_lock(sdata);
2648
2649 if (len < 24 + 2)
2650 return;
2651
2652 if (!ifmgd->associated ||
2653 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2654 return;
2655
2656 bssid = ifmgd->associated->bssid;
2657
2658 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2659
2660 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2661 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2662
2663 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2664
2665 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2666 }
2667
2668
2669 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2670 struct ieee80211_mgmt *mgmt, size_t len)
2671 {
2672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2673 u16 reason_code;
2674
2675 sdata_assert_lock(sdata);
2676
2677 if (len < 24 + 2)
2678 return;
2679
2680 if (!ifmgd->associated ||
2681 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2682 return;
2683
2684 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2685
2686 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2687 mgmt->sa, reason_code);
2688
2689 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2690
2691 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2692 }
2693
2694 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2695 u8 *supp_rates, unsigned int supp_rates_len,
2696 u32 *rates, u32 *basic_rates,
2697 bool *have_higher_than_11mbit,
2698 int *min_rate, int *min_rate_index,
2699 int shift, u32 rate_flags)
2700 {
2701 int i, j;
2702
2703 for (i = 0; i < supp_rates_len; i++) {
2704 int rate = supp_rates[i] & 0x7f;
2705 bool is_basic = !!(supp_rates[i] & 0x80);
2706
2707 if ((rate * 5 * (1 << shift)) > 110)
2708 *have_higher_than_11mbit = true;
2709
2710 /*
2711 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2712 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2713 *
2714 * Note: Even through the membership selector and the basic
2715 * rate flag share the same bit, they are not exactly
2716 * the same.
2717 */
2718 if (!!(supp_rates[i] & 0x80) &&
2719 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2720 continue;
2721
2722 for (j = 0; j < sband->n_bitrates; j++) {
2723 struct ieee80211_rate *br;
2724 int brate;
2725
2726 br = &sband->bitrates[j];
2727 if ((rate_flags & br->flags) != rate_flags)
2728 continue;
2729
2730 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2731 if (brate == rate) {
2732 *rates |= BIT(j);
2733 if (is_basic)
2734 *basic_rates |= BIT(j);
2735 if ((rate * 5) < *min_rate) {
2736 *min_rate = rate * 5;
2737 *min_rate_index = j;
2738 }
2739 break;
2740 }
2741 }
2742 }
2743 }
2744
2745 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2746 bool assoc)
2747 {
2748 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2749
2750 sdata_assert_lock(sdata);
2751
2752 if (!assoc) {
2753 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2754
2755 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2756 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2757 sdata->u.mgd.flags = 0;
2758 mutex_lock(&sdata->local->mtx);
2759 ieee80211_vif_release_channel(sdata);
2760 mutex_unlock(&sdata->local->mtx);
2761 }
2762
2763 kfree(assoc_data);
2764 sdata->u.mgd.assoc_data = NULL;
2765 }
2766
2767 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2768 struct cfg80211_bss *cbss,
2769 struct ieee80211_mgmt *mgmt, size_t len)
2770 {
2771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2772 struct ieee80211_local *local = sdata->local;
2773 struct ieee80211_supported_band *sband;
2774 struct sta_info *sta;
2775 u8 *pos;
2776 u16 capab_info, aid;
2777 struct ieee802_11_elems elems;
2778 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2779 const struct cfg80211_bss_ies *bss_ies = NULL;
2780 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2781 u32 changed = 0;
2782 int err;
2783 bool ret;
2784
2785 /* AssocResp and ReassocResp have identical structure */
2786
2787 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2788 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2789
2790 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2791 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2792 aid);
2793 aid &= ~(BIT(15) | BIT(14));
2794
2795 ifmgd->broken_ap = false;
2796
2797 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2798 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2799 aid);
2800 aid = 0;
2801 ifmgd->broken_ap = true;
2802 }
2803
2804 pos = mgmt->u.assoc_resp.variable;
2805 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2806
2807 if (!elems.supp_rates) {
2808 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2809 return false;
2810 }
2811
2812 ifmgd->aid = aid;
2813 ifmgd->tdls_chan_switch_prohibited =
2814 elems.ext_capab && elems.ext_capab_len >= 5 &&
2815 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2816
2817 /*
2818 * Some APs are erroneously not including some information in their
2819 * (re)association response frames. Try to recover by using the data
2820 * from the beacon or probe response. This seems to afflict mobile
2821 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2822 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2823 */
2824 if ((assoc_data->wmm && !elems.wmm_param) ||
2825 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2826 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2827 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2828 (!elems.vht_cap_elem || !elems.vht_operation))) {
2829 const struct cfg80211_bss_ies *ies;
2830 struct ieee802_11_elems bss_elems;
2831
2832 rcu_read_lock();
2833 ies = rcu_dereference(cbss->ies);
2834 if (ies)
2835 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2836 GFP_ATOMIC);
2837 rcu_read_unlock();
2838 if (!bss_ies)
2839 return false;
2840
2841 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2842 false, &bss_elems);
2843 if (assoc_data->wmm &&
2844 !elems.wmm_param && bss_elems.wmm_param) {
2845 elems.wmm_param = bss_elems.wmm_param;
2846 sdata_info(sdata,
2847 "AP bug: WMM param missing from AssocResp\n");
2848 }
2849
2850 /*
2851 * Also check if we requested HT/VHT, otherwise the AP doesn't
2852 * have to include the IEs in the (re)association response.
2853 */
2854 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2855 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2856 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2857 sdata_info(sdata,
2858 "AP bug: HT capability missing from AssocResp\n");
2859 }
2860 if (!elems.ht_operation && bss_elems.ht_operation &&
2861 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2862 elems.ht_operation = bss_elems.ht_operation;
2863 sdata_info(sdata,
2864 "AP bug: HT operation missing from AssocResp\n");
2865 }
2866 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2867 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2868 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2869 sdata_info(sdata,
2870 "AP bug: VHT capa missing from AssocResp\n");
2871 }
2872 if (!elems.vht_operation && bss_elems.vht_operation &&
2873 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2874 elems.vht_operation = bss_elems.vht_operation;
2875 sdata_info(sdata,
2876 "AP bug: VHT operation missing from AssocResp\n");
2877 }
2878 }
2879
2880 /*
2881 * We previously checked these in the beacon/probe response, so
2882 * they should be present here. This is just a safety net.
2883 */
2884 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2885 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2886 sdata_info(sdata,
2887 "HT AP is missing WMM params or HT capability/operation\n");
2888 ret = false;
2889 goto out;
2890 }
2891
2892 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2893 (!elems.vht_cap_elem || !elems.vht_operation)) {
2894 sdata_info(sdata,
2895 "VHT AP is missing VHT capability/operation\n");
2896 ret = false;
2897 goto out;
2898 }
2899
2900 mutex_lock(&sdata->local->sta_mtx);
2901 /*
2902 * station info was already allocated and inserted before
2903 * the association and should be available to us
2904 */
2905 sta = sta_info_get(sdata, cbss->bssid);
2906 if (WARN_ON(!sta)) {
2907 mutex_unlock(&sdata->local->sta_mtx);
2908 ret = false;
2909 goto out;
2910 }
2911
2912 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2913
2914 /* Set up internal HT/VHT capabilities */
2915 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2916 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2917 elems.ht_cap_elem, sta);
2918
2919 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2920 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2921 elems.vht_cap_elem, sta);
2922
2923 /*
2924 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2925 * in their association response, so ignore that data for our own
2926 * configuration. If it changed since the last beacon, we'll get the
2927 * next beacon and update then.
2928 */
2929
2930 /*
2931 * If an operating mode notification IE is present, override the
2932 * NSS calculation (that would be done in rate_control_rate_init())
2933 * and use the # of streams from that element.
2934 */
2935 if (elems.opmode_notif &&
2936 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2937 u8 nss;
2938
2939 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2940 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2941 nss += 1;
2942 sta->sta.rx_nss = nss;
2943 }
2944
2945 rate_control_rate_init(sta);
2946
2947 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2948 set_sta_flag(sta, WLAN_STA_MFP);
2949
2950 sta->sta.wme = elems.wmm_param;
2951
2952 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2953 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2954 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2955 if (err) {
2956 sdata_info(sdata,
2957 "failed to move station %pM to desired state\n",
2958 sta->sta.addr);
2959 WARN_ON(__sta_info_destroy(sta));
2960 mutex_unlock(&sdata->local->sta_mtx);
2961 ret = false;
2962 goto out;
2963 }
2964
2965 mutex_unlock(&sdata->local->sta_mtx);
2966
2967 /*
2968 * Always handle WMM once after association regardless
2969 * of the first value the AP uses. Setting -1 here has
2970 * that effect because the AP values is an unsigned
2971 * 4-bit value.
2972 */
2973 ifmgd->wmm_last_param_set = -1;
2974
2975 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2976 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2977 elems.wmm_param_len);
2978 else
2979 ieee80211_set_wmm_default(sdata, false);
2980 changed |= BSS_CHANGED_QOS;
2981
2982 /* set AID and assoc capability,
2983 * ieee80211_set_associated() will tell the driver */
2984 bss_conf->aid = aid;
2985 bss_conf->assoc_capability = capab_info;
2986 ieee80211_set_associated(sdata, cbss, changed);
2987
2988 /*
2989 * If we're using 4-addr mode, let the AP know that we're
2990 * doing so, so that it can create the STA VLAN on its side
2991 */
2992 if (ifmgd->use_4addr)
2993 ieee80211_send_4addr_nullfunc(local, sdata);
2994
2995 /*
2996 * Start timer to probe the connection to the AP now.
2997 * Also start the timer that will detect beacon loss.
2998 */
2999 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3000 ieee80211_sta_reset_beacon_monitor(sdata);
3001
3002 ret = true;
3003 out:
3004 kfree(bss_ies);
3005 return ret;
3006 }
3007
3008 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3009 struct ieee80211_mgmt *mgmt,
3010 size_t len)
3011 {
3012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3013 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3014 u16 capab_info, status_code, aid;
3015 struct ieee802_11_elems elems;
3016 int ac, uapsd_queues = -1;
3017 u8 *pos;
3018 bool reassoc;
3019 struct cfg80211_bss *bss;
3020
3021 sdata_assert_lock(sdata);
3022
3023 if (!assoc_data)
3024 return;
3025 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3026 return;
3027
3028 /*
3029 * AssocResp and ReassocResp have identical structure, so process both
3030 * of them in this function.
3031 */
3032
3033 if (len < 24 + 6)
3034 return;
3035
3036 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3037 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3038 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3039 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3040
3041 sdata_info(sdata,
3042 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3043 reassoc ? "Rea" : "A", mgmt->sa,
3044 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3045
3046 pos = mgmt->u.assoc_resp.variable;
3047 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3048
3049 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3050 elems.timeout_int &&
3051 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3052 u32 tu, ms;
3053 tu = le32_to_cpu(elems.timeout_int->value);
3054 ms = tu * 1024 / 1000;
3055 sdata_info(sdata,
3056 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3057 mgmt->sa, tu, ms);
3058 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3059 assoc_data->timeout_started = true;
3060 if (ms > IEEE80211_ASSOC_TIMEOUT)
3061 run_again(sdata, assoc_data->timeout);
3062 return;
3063 }
3064
3065 bss = assoc_data->bss;
3066
3067 if (status_code != WLAN_STATUS_SUCCESS) {
3068 sdata_info(sdata, "%pM denied association (code=%d)\n",
3069 mgmt->sa, status_code);
3070 ieee80211_destroy_assoc_data(sdata, false);
3071 } else {
3072 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3073 /* oops -- internal error -- send timeout for now */
3074 ieee80211_destroy_assoc_data(sdata, false);
3075 cfg80211_assoc_timeout(sdata->dev, bss);
3076 return;
3077 }
3078 sdata_info(sdata, "associated\n");
3079
3080 /*
3081 * destroy assoc_data afterwards, as otherwise an idle
3082 * recalc after assoc_data is NULL but before associated
3083 * is set can cause the interface to go idle
3084 */
3085 ieee80211_destroy_assoc_data(sdata, true);
3086
3087 /* get uapsd queues configuration */
3088 uapsd_queues = 0;
3089 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3090 if (sdata->tx_conf[ac].uapsd)
3091 uapsd_queues |= BIT(ac);
3092 }
3093
3094 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3095 }
3096
3097 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3098 struct ieee80211_mgmt *mgmt, size_t len,
3099 struct ieee80211_rx_status *rx_status,
3100 struct ieee802_11_elems *elems)
3101 {
3102 struct ieee80211_local *local = sdata->local;
3103 struct ieee80211_bss *bss;
3104 struct ieee80211_channel *channel;
3105
3106 sdata_assert_lock(sdata);
3107
3108 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3109 if (!channel)
3110 return;
3111
3112 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3113 channel);
3114 if (bss) {
3115 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3116 ieee80211_rx_bss_put(local, bss);
3117 }
3118 }
3119
3120
3121 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3122 struct sk_buff *skb)
3123 {
3124 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3125 struct ieee80211_if_managed *ifmgd;
3126 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3127 size_t baselen, len = skb->len;
3128 struct ieee802_11_elems elems;
3129
3130 ifmgd = &sdata->u.mgd;
3131
3132 sdata_assert_lock(sdata);
3133
3134 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3135 return; /* ignore ProbeResp to foreign address */
3136
3137 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3138 if (baselen > len)
3139 return;
3140
3141 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3142 false, &elems);
3143
3144 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3145
3146 if (ifmgd->associated &&
3147 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3148 ieee80211_reset_ap_probe(sdata);
3149
3150 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3151 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3152 /* got probe response, continue with auth */
3153 sdata_info(sdata, "direct probe responded\n");
3154 ifmgd->auth_data->tries = 0;
3155 ifmgd->auth_data->timeout = jiffies;
3156 ifmgd->auth_data->timeout_started = true;
3157 run_again(sdata, ifmgd->auth_data->timeout);
3158 }
3159 }
3160
3161 /*
3162 * This is the canonical list of information elements we care about,
3163 * the filter code also gives us all changes to the Microsoft OUI
3164 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3165 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3166 * changes to requested client power.
3167 *
3168 * We implement beacon filtering in software since that means we can
3169 * avoid processing the frame here and in cfg80211, and userspace
3170 * will not be able to tell whether the hardware supports it or not.
3171 *
3172 * XXX: This list needs to be dynamic -- userspace needs to be able to
3173 * add items it requires. It also needs to be able to tell us to
3174 * look out for other vendor IEs.
3175 */
3176 static const u64 care_about_ies =
3177 (1ULL << WLAN_EID_COUNTRY) |
3178 (1ULL << WLAN_EID_ERP_INFO) |
3179 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3180 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3181 (1ULL << WLAN_EID_HT_CAPABILITY) |
3182 (1ULL << WLAN_EID_HT_OPERATION);
3183
3184 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3185 struct ieee80211_mgmt *mgmt, size_t len,
3186 struct ieee80211_rx_status *rx_status)
3187 {
3188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3189 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3190 size_t baselen;
3191 struct ieee802_11_elems elems;
3192 struct ieee80211_local *local = sdata->local;
3193 struct ieee80211_chanctx_conf *chanctx_conf;
3194 struct ieee80211_channel *chan;
3195 struct sta_info *sta;
3196 u32 changed = 0;
3197 bool erp_valid;
3198 u8 erp_value = 0;
3199 u32 ncrc;
3200 u8 *bssid;
3201 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3202
3203 sdata_assert_lock(sdata);
3204
3205 /* Process beacon from the current BSS */
3206 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3207 if (baselen > len)
3208 return;
3209
3210 rcu_read_lock();
3211 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3212 if (!chanctx_conf) {
3213 rcu_read_unlock();
3214 return;
3215 }
3216
3217 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3218 rcu_read_unlock();
3219 return;
3220 }
3221 chan = chanctx_conf->def.chan;
3222 rcu_read_unlock();
3223
3224 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3225 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3226 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3227 len - baselen, false, &elems);
3228
3229 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3230 if (elems.tim && !elems.parse_error) {
3231 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3232 ifmgd->dtim_period = tim_ie->dtim_period;
3233 }
3234 ifmgd->have_beacon = true;
3235 ifmgd->assoc_data->need_beacon = false;
3236 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3237 sdata->vif.bss_conf.sync_tsf =
3238 le64_to_cpu(mgmt->u.beacon.timestamp);
3239 sdata->vif.bss_conf.sync_device_ts =
3240 rx_status->device_timestamp;
3241 if (elems.tim)
3242 sdata->vif.bss_conf.sync_dtim_count =
3243 elems.tim->dtim_count;
3244 else
3245 sdata->vif.bss_conf.sync_dtim_count = 0;
3246 }
3247 /* continue assoc process */
3248 ifmgd->assoc_data->timeout = jiffies;
3249 ifmgd->assoc_data->timeout_started = true;
3250 run_again(sdata, ifmgd->assoc_data->timeout);
3251 return;
3252 }
3253
3254 if (!ifmgd->associated ||
3255 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3256 return;
3257 bssid = ifmgd->associated->bssid;
3258
3259 /* Track average RSSI from the Beacon frames of the current AP */
3260 ifmgd->last_beacon_signal = rx_status->signal;
3261 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3262 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3263 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3264 ifmgd->last_cqm_event_signal = 0;
3265 ifmgd->count_beacon_signal = 1;
3266 ifmgd->last_ave_beacon_signal = 0;
3267 } else {
3268 ifmgd->ave_beacon_signal =
3269 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3270 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3271 ifmgd->ave_beacon_signal) / 16;
3272 ifmgd->count_beacon_signal++;
3273 }
3274
3275 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3276 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3277 int sig = ifmgd->ave_beacon_signal;
3278 int last_sig = ifmgd->last_ave_beacon_signal;
3279
3280 /*
3281 * if signal crosses either of the boundaries, invoke callback
3282 * with appropriate parameters
3283 */
3284 if (sig > ifmgd->rssi_max_thold &&
3285 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3286 ifmgd->last_ave_beacon_signal = sig;
3287 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3288 } else if (sig < ifmgd->rssi_min_thold &&
3289 (last_sig >= ifmgd->rssi_max_thold ||
3290 last_sig == 0)) {
3291 ifmgd->last_ave_beacon_signal = sig;
3292 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3293 }
3294 }
3295
3296 if (bss_conf->cqm_rssi_thold &&
3297 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3298 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3299 int sig = ifmgd->ave_beacon_signal / 16;
3300 int last_event = ifmgd->last_cqm_event_signal;
3301 int thold = bss_conf->cqm_rssi_thold;
3302 int hyst = bss_conf->cqm_rssi_hyst;
3303 if (sig < thold &&
3304 (last_event == 0 || sig < last_event - hyst)) {
3305 ifmgd->last_cqm_event_signal = sig;
3306 ieee80211_cqm_rssi_notify(
3307 &sdata->vif,
3308 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3309 GFP_KERNEL);
3310 } else if (sig > thold &&
3311 (last_event == 0 || sig > last_event + hyst)) {
3312 ifmgd->last_cqm_event_signal = sig;
3313 ieee80211_cqm_rssi_notify(
3314 &sdata->vif,
3315 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3316 GFP_KERNEL);
3317 }
3318 }
3319
3320 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3321 mlme_dbg_ratelimited(sdata,
3322 "cancelling AP probe due to a received beacon\n");
3323 ieee80211_reset_ap_probe(sdata);
3324 }
3325
3326 /*
3327 * Push the beacon loss detection into the future since
3328 * we are processing a beacon from the AP just now.
3329 */
3330 ieee80211_sta_reset_beacon_monitor(sdata);
3331
3332 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3333 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3334 len - baselen, false, &elems,
3335 care_about_ies, ncrc);
3336
3337 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3338 bool directed_tim = ieee80211_check_tim(elems.tim,
3339 elems.tim_len,
3340 ifmgd->aid);
3341 if (directed_tim) {
3342 if (local->hw.conf.dynamic_ps_timeout > 0) {
3343 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3344 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3345 ieee80211_hw_config(local,
3346 IEEE80211_CONF_CHANGE_PS);
3347 }
3348 ieee80211_send_nullfunc(local, sdata, 0);
3349 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3350 local->pspolling = true;
3351
3352 /*
3353 * Here is assumed that the driver will be
3354 * able to send ps-poll frame and receive a
3355 * response even though power save mode is
3356 * enabled, but some drivers might require
3357 * to disable power save here. This needs
3358 * to be investigated.
3359 */
3360 ieee80211_send_pspoll(local, sdata);
3361 }
3362 }
3363 }
3364
3365 if (sdata->vif.p2p) {
3366 struct ieee80211_p2p_noa_attr noa = {};
3367 int ret;
3368
3369 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3370 len - baselen,
3371 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3372 (u8 *) &noa, sizeof(noa));
3373 if (ret >= 2) {
3374 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3375 /* valid noa_attr and index changed */
3376 sdata->u.mgd.p2p_noa_index = noa.index;
3377 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3378 changed |= BSS_CHANGED_P2P_PS;
3379 /*
3380 * make sure we update all information, the CRC
3381 * mechanism doesn't look at P2P attributes.
3382 */
3383 ifmgd->beacon_crc_valid = false;
3384 }
3385 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3386 /* noa_attr not found and we had valid noa_attr before */
3387 sdata->u.mgd.p2p_noa_index = -1;
3388 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3389 changed |= BSS_CHANGED_P2P_PS;
3390 ifmgd->beacon_crc_valid = false;
3391 }
3392 }
3393
3394 if (ifmgd->csa_waiting_bcn)
3395 ieee80211_chswitch_post_beacon(sdata);
3396
3397 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3398 return;
3399 ifmgd->beacon_crc = ncrc;
3400 ifmgd->beacon_crc_valid = true;
3401
3402 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3403
3404 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3405 rx_status->device_timestamp,
3406 &elems, true);
3407
3408 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3409 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3410 elems.wmm_param_len))
3411 changed |= BSS_CHANGED_QOS;
3412
3413 /*
3414 * If we haven't had a beacon before, tell the driver about the
3415 * DTIM period (and beacon timing if desired) now.
3416 */
3417 if (!ifmgd->have_beacon) {
3418 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3419 if (elems.tim)
3420 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3421 else
3422 bss_conf->dtim_period = 1;
3423
3424 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3425 sdata->vif.bss_conf.sync_tsf =
3426 le64_to_cpu(mgmt->u.beacon.timestamp);
3427 sdata->vif.bss_conf.sync_device_ts =
3428 rx_status->device_timestamp;
3429 if (elems.tim)
3430 sdata->vif.bss_conf.sync_dtim_count =
3431 elems.tim->dtim_count;
3432 else
3433 sdata->vif.bss_conf.sync_dtim_count = 0;
3434 }
3435
3436 changed |= BSS_CHANGED_BEACON_INFO;
3437 ifmgd->have_beacon = true;
3438
3439 mutex_lock(&local->iflist_mtx);
3440 ieee80211_recalc_ps(local, -1);
3441 mutex_unlock(&local->iflist_mtx);
3442
3443 ieee80211_recalc_ps_vif(sdata);
3444 }
3445
3446 if (elems.erp_info) {
3447 erp_valid = true;
3448 erp_value = elems.erp_info[0];
3449 } else {
3450 erp_valid = false;
3451 }
3452 changed |= ieee80211_handle_bss_capability(sdata,
3453 le16_to_cpu(mgmt->u.beacon.capab_info),
3454 erp_valid, erp_value);
3455
3456 mutex_lock(&local->sta_mtx);
3457 sta = sta_info_get(sdata, bssid);
3458
3459 if (ieee80211_config_bw(sdata, sta,
3460 elems.ht_cap_elem, elems.ht_operation,
3461 elems.vht_operation, bssid, &changed)) {
3462 mutex_unlock(&local->sta_mtx);
3463 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3464 WLAN_REASON_DEAUTH_LEAVING,
3465 true, deauth_buf);
3466 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3467 sizeof(deauth_buf));
3468 return;
3469 }
3470
3471 if (sta && elems.opmode_notif)
3472 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3473 rx_status->band, true);
3474 mutex_unlock(&local->sta_mtx);
3475
3476 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3477 elems.country_elem,
3478 elems.country_elem_len,
3479 elems.pwr_constr_elem,
3480 elems.cisco_dtpc_elem);
3481
3482 ieee80211_bss_info_change_notify(sdata, changed);
3483 }
3484
3485 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3486 struct sk_buff *skb)
3487 {
3488 struct ieee80211_rx_status *rx_status;
3489 struct ieee80211_mgmt *mgmt;
3490 u16 fc;
3491 struct ieee802_11_elems elems;
3492 int ies_len;
3493
3494 rx_status = (struct ieee80211_rx_status *) skb->cb;
3495 mgmt = (struct ieee80211_mgmt *) skb->data;
3496 fc = le16_to_cpu(mgmt->frame_control);
3497
3498 sdata_lock(sdata);
3499
3500 switch (fc & IEEE80211_FCTL_STYPE) {
3501 case IEEE80211_STYPE_BEACON:
3502 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3503 break;
3504 case IEEE80211_STYPE_PROBE_RESP:
3505 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3506 break;
3507 case IEEE80211_STYPE_AUTH:
3508 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3509 break;
3510 case IEEE80211_STYPE_DEAUTH:
3511 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3512 break;
3513 case IEEE80211_STYPE_DISASSOC:
3514 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3515 break;
3516 case IEEE80211_STYPE_ASSOC_RESP:
3517 case IEEE80211_STYPE_REASSOC_RESP:
3518 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3519 break;
3520 case IEEE80211_STYPE_ACTION:
3521 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3522 ies_len = skb->len -
3523 offsetof(struct ieee80211_mgmt,
3524 u.action.u.chan_switch.variable);
3525
3526 if (ies_len < 0)
3527 break;
3528
3529 ieee802_11_parse_elems(
3530 mgmt->u.action.u.chan_switch.variable,
3531 ies_len, true, &elems);
3532
3533 if (elems.parse_error)
3534 break;
3535
3536 ieee80211_sta_process_chanswitch(sdata,
3537 rx_status->mactime,
3538 rx_status->device_timestamp,
3539 &elems, false);
3540 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3541 ies_len = skb->len -
3542 offsetof(struct ieee80211_mgmt,
3543 u.action.u.ext_chan_switch.variable);
3544
3545 if (ies_len < 0)
3546 break;
3547
3548 ieee802_11_parse_elems(
3549 mgmt->u.action.u.ext_chan_switch.variable,
3550 ies_len, true, &elems);
3551
3552 if (elems.parse_error)
3553 break;
3554
3555 /* for the handling code pretend this was also an IE */
3556 elems.ext_chansw_ie =
3557 &mgmt->u.action.u.ext_chan_switch.data;
3558
3559 ieee80211_sta_process_chanswitch(sdata,
3560 rx_status->mactime,
3561 rx_status->device_timestamp,
3562 &elems, false);
3563 }
3564 break;
3565 }
3566 sdata_unlock(sdata);
3567 }
3568
3569 static void ieee80211_sta_timer(unsigned long data)
3570 {
3571 struct ieee80211_sub_if_data *sdata =
3572 (struct ieee80211_sub_if_data *) data;
3573
3574 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3575 }
3576
3577 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3578 u8 *bssid, u8 reason, bool tx)
3579 {
3580 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3581
3582 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3583 tx, frame_buf);
3584
3585 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3586 IEEE80211_DEAUTH_FRAME_LEN);
3587 }
3588
3589 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3590 {
3591 struct ieee80211_local *local = sdata->local;
3592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3593 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3594 u32 tx_flags = 0;
3595
3596 sdata_assert_lock(sdata);
3597
3598 if (WARN_ON_ONCE(!auth_data))
3599 return -EINVAL;
3600
3601 auth_data->tries++;
3602
3603 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3604 sdata_info(sdata, "authentication with %pM timed out\n",
3605 auth_data->bss->bssid);
3606
3607 /*
3608 * Most likely AP is not in the range so remove the
3609 * bss struct for that AP.
3610 */
3611 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3612
3613 return -ETIMEDOUT;
3614 }
3615
3616 drv_mgd_prepare_tx(local, sdata);
3617
3618 if (auth_data->bss->proberesp_ies) {
3619 u16 trans = 1;
3620 u16 status = 0;
3621
3622 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3623 auth_data->bss->bssid, auth_data->tries,
3624 IEEE80211_AUTH_MAX_TRIES);
3625
3626 auth_data->expected_transaction = 2;
3627
3628 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3629 trans = auth_data->sae_trans;
3630 status = auth_data->sae_status;
3631 auth_data->expected_transaction = trans;
3632 }
3633
3634 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3635 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3636 IEEE80211_TX_INTFL_MLME_CONN_TX;
3637
3638 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3639 auth_data->data, auth_data->data_len,
3640 auth_data->bss->bssid,
3641 auth_data->bss->bssid, NULL, 0, 0,
3642 tx_flags);
3643 } else {
3644 const u8 *ssidie;
3645
3646 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3647 auth_data->bss->bssid, auth_data->tries,
3648 IEEE80211_AUTH_MAX_TRIES);
3649
3650 rcu_read_lock();
3651 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3652 if (!ssidie) {
3653 rcu_read_unlock();
3654 return -EINVAL;
3655 }
3656 /*
3657 * Direct probe is sent to broadcast address as some APs
3658 * will not answer to direct packet in unassociated state.
3659 */
3660 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3661 ssidie + 2, ssidie[1],
3662 NULL, 0, (u32) -1, true, 0,
3663 auth_data->bss->channel, false);
3664 rcu_read_unlock();
3665 }
3666
3667 if (tx_flags == 0) {
3668 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3669 auth_data->timeout_started = true;
3670 run_again(sdata, auth_data->timeout);
3671 } else {
3672 auth_data->timeout =
3673 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3674 auth_data->timeout_started = true;
3675 run_again(sdata, auth_data->timeout);
3676 }
3677
3678 return 0;
3679 }
3680
3681 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3682 {
3683 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3684 struct ieee80211_local *local = sdata->local;
3685
3686 sdata_assert_lock(sdata);
3687
3688 assoc_data->tries++;
3689 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3690 sdata_info(sdata, "association with %pM timed out\n",
3691 assoc_data->bss->bssid);
3692
3693 /*
3694 * Most likely AP is not in the range so remove the
3695 * bss struct for that AP.
3696 */
3697 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3698
3699 return -ETIMEDOUT;
3700 }
3701
3702 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3703 assoc_data->bss->bssid, assoc_data->tries,
3704 IEEE80211_ASSOC_MAX_TRIES);
3705 ieee80211_send_assoc(sdata);
3706
3707 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3708 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3709 assoc_data->timeout_started = true;
3710 run_again(sdata, assoc_data->timeout);
3711 } else {
3712 assoc_data->timeout =
3713 round_jiffies_up(jiffies +
3714 IEEE80211_ASSOC_TIMEOUT_LONG);
3715 assoc_data->timeout_started = true;
3716 run_again(sdata, assoc_data->timeout);
3717 }
3718
3719 return 0;
3720 }
3721
3722 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3723 __le16 fc, bool acked)
3724 {
3725 struct ieee80211_local *local = sdata->local;
3726
3727 sdata->u.mgd.status_fc = fc;
3728 sdata->u.mgd.status_acked = acked;
3729 sdata->u.mgd.status_received = true;
3730
3731 ieee80211_queue_work(&local->hw, &sdata->work);
3732 }
3733
3734 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3735 {
3736 struct ieee80211_local *local = sdata->local;
3737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3738
3739 sdata_lock(sdata);
3740
3741 if (ifmgd->status_received) {
3742 __le16 fc = ifmgd->status_fc;
3743 bool status_acked = ifmgd->status_acked;
3744
3745 ifmgd->status_received = false;
3746 if (ifmgd->auth_data &&
3747 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3748 if (status_acked) {
3749 ifmgd->auth_data->timeout =
3750 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3751 run_again(sdata, ifmgd->auth_data->timeout);
3752 } else {
3753 ifmgd->auth_data->timeout = jiffies - 1;
3754 }
3755 ifmgd->auth_data->timeout_started = true;
3756 } else if (ifmgd->assoc_data &&
3757 (ieee80211_is_assoc_req(fc) ||
3758 ieee80211_is_reassoc_req(fc))) {
3759 if (status_acked) {
3760 ifmgd->assoc_data->timeout =
3761 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3762 run_again(sdata, ifmgd->assoc_data->timeout);
3763 } else {
3764 ifmgd->assoc_data->timeout = jiffies - 1;
3765 }
3766 ifmgd->assoc_data->timeout_started = true;
3767 }
3768 }
3769
3770 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3771 time_after(jiffies, ifmgd->auth_data->timeout)) {
3772 if (ifmgd->auth_data->done) {
3773 /*
3774 * ok ... we waited for assoc but userspace didn't,
3775 * so let's just kill the auth data
3776 */
3777 ieee80211_destroy_auth_data(sdata, false);
3778 } else if (ieee80211_probe_auth(sdata)) {
3779 u8 bssid[ETH_ALEN];
3780
3781 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3782
3783 ieee80211_destroy_auth_data(sdata, false);
3784
3785 cfg80211_auth_timeout(sdata->dev, bssid);
3786 }
3787 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3788 run_again(sdata, ifmgd->auth_data->timeout);
3789
3790 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3791 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3792 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3793 ieee80211_do_assoc(sdata)) {
3794 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3795
3796 ieee80211_destroy_assoc_data(sdata, false);
3797 cfg80211_assoc_timeout(sdata->dev, bss);
3798 }
3799 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3800 run_again(sdata, ifmgd->assoc_data->timeout);
3801
3802 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3803 ifmgd->associated) {
3804 u8 bssid[ETH_ALEN];
3805 int max_tries;
3806
3807 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3808
3809 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3810 max_tries = max_nullfunc_tries;
3811 else
3812 max_tries = max_probe_tries;
3813
3814 /* ACK received for nullfunc probing frame */
3815 if (!ifmgd->probe_send_count)
3816 ieee80211_reset_ap_probe(sdata);
3817 else if (ifmgd->nullfunc_failed) {
3818 if (ifmgd->probe_send_count < max_tries) {
3819 mlme_dbg(sdata,
3820 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3821 bssid, ifmgd->probe_send_count,
3822 max_tries);
3823 ieee80211_mgd_probe_ap_send(sdata);
3824 } else {
3825 mlme_dbg(sdata,
3826 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3827 bssid);
3828 ieee80211_sta_connection_lost(sdata, bssid,
3829 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3830 false);
3831 }
3832 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3833 run_again(sdata, ifmgd->probe_timeout);
3834 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3835 mlme_dbg(sdata,
3836 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3837 bssid, probe_wait_ms);
3838 ieee80211_sta_connection_lost(sdata, bssid,
3839 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3840 } else if (ifmgd->probe_send_count < max_tries) {
3841 mlme_dbg(sdata,
3842 "No probe response from AP %pM after %dms, try %d/%i\n",
3843 bssid, probe_wait_ms,
3844 ifmgd->probe_send_count, max_tries);
3845 ieee80211_mgd_probe_ap_send(sdata);
3846 } else {
3847 /*
3848 * We actually lost the connection ... or did we?
3849 * Let's make sure!
3850 */
3851 wiphy_debug(local->hw.wiphy,
3852 "%s: No probe response from AP %pM"
3853 " after %dms, disconnecting.\n",
3854 sdata->name,
3855 bssid, probe_wait_ms);
3856
3857 ieee80211_sta_connection_lost(sdata, bssid,
3858 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3859 }
3860 }
3861
3862 sdata_unlock(sdata);
3863 }
3864
3865 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3866 {
3867 struct ieee80211_sub_if_data *sdata =
3868 (struct ieee80211_sub_if_data *) data;
3869 struct ieee80211_local *local = sdata->local;
3870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3871
3872 if (local->quiescing)
3873 return;
3874
3875 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3876 return;
3877
3878 sdata->u.mgd.connection_loss = false;
3879 ieee80211_queue_work(&sdata->local->hw,
3880 &sdata->u.mgd.beacon_connection_loss_work);
3881 }
3882
3883 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3884 {
3885 struct ieee80211_sub_if_data *sdata =
3886 (struct ieee80211_sub_if_data *) data;
3887 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3888 struct ieee80211_local *local = sdata->local;
3889
3890 if (local->quiescing)
3891 return;
3892
3893 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3894 return;
3895
3896 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3897 }
3898
3899 static void ieee80211_sta_monitor_work(struct work_struct *work)
3900 {
3901 struct ieee80211_sub_if_data *sdata =
3902 container_of(work, struct ieee80211_sub_if_data,
3903 u.mgd.monitor_work);
3904
3905 ieee80211_mgd_probe_ap(sdata, false);
3906 }
3907
3908 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3909 {
3910 u32 flags;
3911
3912 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3913 __ieee80211_stop_poll(sdata);
3914
3915 /* let's probe the connection once */
3916 flags = sdata->local->hw.flags;
3917 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3918 ieee80211_queue_work(&sdata->local->hw,
3919 &sdata->u.mgd.monitor_work);
3920 /* and do all the other regular work too */
3921 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3922 }
3923 }
3924
3925 #ifdef CONFIG_PM
3926 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3927 {
3928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3929 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3930
3931 sdata_lock(sdata);
3932
3933 if (ifmgd->auth_data || ifmgd->assoc_data) {
3934 const u8 *bssid = ifmgd->auth_data ?
3935 ifmgd->auth_data->bss->bssid :
3936 ifmgd->assoc_data->bss->bssid;
3937
3938 /*
3939 * If we are trying to authenticate / associate while suspending,
3940 * cfg80211 won't know and won't actually abort those attempts,
3941 * thus we need to do that ourselves.
3942 */
3943 ieee80211_send_deauth_disassoc(sdata, bssid,
3944 IEEE80211_STYPE_DEAUTH,
3945 WLAN_REASON_DEAUTH_LEAVING,
3946 false, frame_buf);
3947 if (ifmgd->assoc_data)
3948 ieee80211_destroy_assoc_data(sdata, false);
3949 if (ifmgd->auth_data)
3950 ieee80211_destroy_auth_data(sdata, false);
3951 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3952 IEEE80211_DEAUTH_FRAME_LEN);
3953 }
3954
3955 sdata_unlock(sdata);
3956 }
3957
3958 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3959 {
3960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3961
3962 sdata_lock(sdata);
3963 if (!ifmgd->associated) {
3964 sdata_unlock(sdata);
3965 return;
3966 }
3967
3968 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3969 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3970 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3971 ieee80211_sta_connection_lost(sdata,
3972 ifmgd->associated->bssid,
3973 WLAN_REASON_UNSPECIFIED,
3974 true);
3975 sdata_unlock(sdata);
3976 return;
3977 }
3978 sdata_unlock(sdata);
3979 }
3980 #endif
3981
3982 /* interface setup */
3983 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3984 {
3985 struct ieee80211_if_managed *ifmgd;
3986
3987 ifmgd = &sdata->u.mgd;
3988 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3989 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3990 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3991 ieee80211_beacon_connection_loss_work);
3992 INIT_WORK(&ifmgd->csa_connection_drop_work,
3993 ieee80211_csa_connection_drop_work);
3994 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3995 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3996 ieee80211_tdls_peer_del_work);
3997 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3998 (unsigned long) sdata);
3999 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4000 (unsigned long) sdata);
4001 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4002 (unsigned long) sdata);
4003 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4004 (unsigned long) sdata);
4005 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4006 ieee80211_sta_handle_tspec_ac_params_wk);
4007
4008 ifmgd->flags = 0;
4009 ifmgd->powersave = sdata->wdev.ps;
4010 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4011 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4012 ifmgd->p2p_noa_index = -1;
4013
4014 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4015 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4016 else
4017 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4018
4019 /* Setup TDLS data */
4020 spin_lock_init(&ifmgd->teardown_lock);
4021 ifmgd->teardown_skb = NULL;
4022 ifmgd->orig_teardown_skb = NULL;
4023 }
4024
4025 /* scan finished notification */
4026 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4027 {
4028 struct ieee80211_sub_if_data *sdata;
4029
4030 /* Restart STA timers */
4031 rcu_read_lock();
4032 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4033 if (ieee80211_sdata_running(sdata))
4034 ieee80211_restart_sta_timer(sdata);
4035 }
4036 rcu_read_unlock();
4037 }
4038
4039 int ieee80211_max_network_latency(struct notifier_block *nb,
4040 unsigned long data, void *dummy)
4041 {
4042 s32 latency_usec = (s32) data;
4043 struct ieee80211_local *local =
4044 container_of(nb, struct ieee80211_local,
4045 network_latency_notifier);
4046
4047 mutex_lock(&local->iflist_mtx);
4048 ieee80211_recalc_ps(local, latency_usec);
4049 mutex_unlock(&local->iflist_mtx);
4050
4051 return NOTIFY_OK;
4052 }
4053
4054 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4055 struct cfg80211_bss *cbss)
4056 {
4057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4058 const u8 *ht_cap_ie, *vht_cap_ie;
4059 const struct ieee80211_ht_cap *ht_cap;
4060 const struct ieee80211_vht_cap *vht_cap;
4061 u8 chains = 1;
4062
4063 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4064 return chains;
4065
4066 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4067 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4068 ht_cap = (void *)(ht_cap_ie + 2);
4069 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4070 /*
4071 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4072 * "Tx Unequal Modulation Supported" fields.
4073 */
4074 }
4075
4076 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4077 return chains;
4078
4079 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4080 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4081 u8 nss;
4082 u16 tx_mcs_map;
4083
4084 vht_cap = (void *)(vht_cap_ie + 2);
4085 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4086 for (nss = 8; nss > 0; nss--) {
4087 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4088 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4089 break;
4090 }
4091 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4092 chains = max(chains, nss);
4093 }
4094
4095 return chains;
4096 }
4097
4098 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4099 struct cfg80211_bss *cbss)
4100 {
4101 struct ieee80211_local *local = sdata->local;
4102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4103 const struct ieee80211_ht_cap *ht_cap = NULL;
4104 const struct ieee80211_ht_operation *ht_oper = NULL;
4105 const struct ieee80211_vht_operation *vht_oper = NULL;
4106 struct ieee80211_supported_band *sband;
4107 struct cfg80211_chan_def chandef;
4108 int ret;
4109
4110 sband = local->hw.wiphy->bands[cbss->channel->band];
4111
4112 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4113 IEEE80211_STA_DISABLE_80P80MHZ |
4114 IEEE80211_STA_DISABLE_160MHZ);
4115
4116 rcu_read_lock();
4117
4118 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4119 sband->ht_cap.ht_supported) {
4120 const u8 *ht_oper_ie, *ht_cap_ie;
4121
4122 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4123 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4124 ht_oper = (void *)(ht_oper_ie + 2);
4125
4126 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4127 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4128 ht_cap = (void *)(ht_cap_ie + 2);
4129
4130 if (!ht_cap) {
4131 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4132 ht_oper = NULL;
4133 }
4134 }
4135
4136 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4137 sband->vht_cap.vht_supported) {
4138 const u8 *vht_oper_ie, *vht_cap;
4139
4140 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4141 WLAN_EID_VHT_OPERATION);
4142 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4143 vht_oper = (void *)(vht_oper_ie + 2);
4144 if (vht_oper && !ht_oper) {
4145 vht_oper = NULL;
4146 sdata_info(sdata,
4147 "AP advertised VHT without HT, disabling both\n");
4148 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4149 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4150 }
4151
4152 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4153 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4154 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4155 vht_oper = NULL;
4156 }
4157 }
4158
4159 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4160 cbss->channel,
4161 ht_cap, ht_oper, vht_oper,
4162 &chandef, false);
4163
4164 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4165 local->rx_chains);
4166
4167 rcu_read_unlock();
4168
4169 /* will change later if needed */
4170 sdata->smps_mode = IEEE80211_SMPS_OFF;
4171
4172 mutex_lock(&local->mtx);
4173 /*
4174 * If this fails (possibly due to channel context sharing
4175 * on incompatible channels, e.g. 80+80 and 160 sharing the
4176 * same control channel) try to use a smaller bandwidth.
4177 */
4178 ret = ieee80211_vif_use_channel(sdata, &chandef,
4179 IEEE80211_CHANCTX_SHARED);
4180
4181 /* don't downgrade for 5 and 10 MHz channels, though. */
4182 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4183 chandef.width == NL80211_CHAN_WIDTH_10)
4184 goto out;
4185
4186 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4187 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4188 ret = ieee80211_vif_use_channel(sdata, &chandef,
4189 IEEE80211_CHANCTX_SHARED);
4190 }
4191 out:
4192 mutex_unlock(&local->mtx);
4193 return ret;
4194 }
4195
4196 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4197 struct cfg80211_bss *cbss, bool assoc)
4198 {
4199 struct ieee80211_local *local = sdata->local;
4200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4201 struct ieee80211_bss *bss = (void *)cbss->priv;
4202 struct sta_info *new_sta = NULL;
4203 struct ieee80211_supported_band *sband;
4204 struct ieee80211_sta_ht_cap sta_ht_cap;
4205 bool have_sta = false, is_override = false;
4206 int err;
4207
4208 sband = local->hw.wiphy->bands[cbss->channel->band];
4209
4210 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4211 return -EINVAL;
4212
4213 if (assoc) {
4214 rcu_read_lock();
4215 have_sta = sta_info_get(sdata, cbss->bssid);
4216 rcu_read_unlock();
4217 }
4218
4219 if (!have_sta) {
4220 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4221 if (!new_sta)
4222 return -ENOMEM;
4223 }
4224
4225 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4226 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4227
4228 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4229 (sband->ht_cap.cap &
4230 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4231
4232 if (new_sta || is_override) {
4233 err = ieee80211_prep_channel(sdata, cbss);
4234 if (err) {
4235 if (new_sta)
4236 sta_info_free(local, new_sta);
4237 return -EINVAL;
4238 }
4239 }
4240
4241 if (new_sta) {
4242 u32 rates = 0, basic_rates = 0;
4243 bool have_higher_than_11mbit;
4244 int min_rate = INT_MAX, min_rate_index = -1;
4245 struct ieee80211_chanctx_conf *chanctx_conf;
4246 const struct cfg80211_bss_ies *ies;
4247 int shift = ieee80211_vif_get_shift(&sdata->vif);
4248 u32 rate_flags;
4249
4250 rcu_read_lock();
4251 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4252 if (WARN_ON(!chanctx_conf)) {
4253 rcu_read_unlock();
4254 sta_info_free(local, new_sta);
4255 return -EINVAL;
4256 }
4257 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4258 rcu_read_unlock();
4259
4260 ieee80211_get_rates(sband, bss->supp_rates,
4261 bss->supp_rates_len,
4262 &rates, &basic_rates,
4263 &have_higher_than_11mbit,
4264 &min_rate, &min_rate_index,
4265 shift, rate_flags);
4266
4267 /*
4268 * This used to be a workaround for basic rates missing
4269 * in the association response frame. Now that we no
4270 * longer use the basic rates from there, it probably
4271 * doesn't happen any more, but keep the workaround so
4272 * in case some *other* APs are buggy in different ways
4273 * we can connect -- with a warning.
4274 */
4275 if (!basic_rates && min_rate_index >= 0) {
4276 sdata_info(sdata,
4277 "No basic rates, using min rate instead\n");
4278 basic_rates = BIT(min_rate_index);
4279 }
4280
4281 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4282 sdata->vif.bss_conf.basic_rates = basic_rates;
4283
4284 /* cf. IEEE 802.11 9.2.12 */
4285 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4286 have_higher_than_11mbit)
4287 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4288 else
4289 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4290
4291 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4292
4293 /* set timing information */
4294 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4295 rcu_read_lock();
4296 ies = rcu_dereference(cbss->beacon_ies);
4297 if (ies) {
4298 const u8 *tim_ie;
4299
4300 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4301 sdata->vif.bss_conf.sync_device_ts =
4302 bss->device_ts_beacon;
4303 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4304 ies->data, ies->len);
4305 if (tim_ie && tim_ie[1] >= 2)
4306 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4307 else
4308 sdata->vif.bss_conf.sync_dtim_count = 0;
4309 } else if (!(local->hw.flags &
4310 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4311 ies = rcu_dereference(cbss->proberesp_ies);
4312 /* must be non-NULL since beacon IEs were NULL */
4313 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4314 sdata->vif.bss_conf.sync_device_ts =
4315 bss->device_ts_presp;
4316 sdata->vif.bss_conf.sync_dtim_count = 0;
4317 } else {
4318 sdata->vif.bss_conf.sync_tsf = 0;
4319 sdata->vif.bss_conf.sync_device_ts = 0;
4320 sdata->vif.bss_conf.sync_dtim_count = 0;
4321 }
4322 rcu_read_unlock();
4323
4324 /* tell driver about BSSID, basic rates and timing */
4325 ieee80211_bss_info_change_notify(sdata,
4326 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4327 BSS_CHANGED_BEACON_INT);
4328
4329 if (assoc)
4330 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4331
4332 err = sta_info_insert(new_sta);
4333 new_sta = NULL;
4334 if (err) {
4335 sdata_info(sdata,
4336 "failed to insert STA entry for the AP (error %d)\n",
4337 err);
4338 return err;
4339 }
4340 } else
4341 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4342
4343 return 0;
4344 }
4345
4346 /* config hooks */
4347 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4348 struct cfg80211_auth_request *req)
4349 {
4350 struct ieee80211_local *local = sdata->local;
4351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4352 struct ieee80211_mgd_auth_data *auth_data;
4353 u16 auth_alg;
4354 int err;
4355
4356 /* prepare auth data structure */
4357
4358 switch (req->auth_type) {
4359 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4360 auth_alg = WLAN_AUTH_OPEN;
4361 break;
4362 case NL80211_AUTHTYPE_SHARED_KEY:
4363 if (IS_ERR(local->wep_tx_tfm))
4364 return -EOPNOTSUPP;
4365 auth_alg = WLAN_AUTH_SHARED_KEY;
4366 break;
4367 case NL80211_AUTHTYPE_FT:
4368 auth_alg = WLAN_AUTH_FT;
4369 break;
4370 case NL80211_AUTHTYPE_NETWORK_EAP:
4371 auth_alg = WLAN_AUTH_LEAP;
4372 break;
4373 case NL80211_AUTHTYPE_SAE:
4374 auth_alg = WLAN_AUTH_SAE;
4375 break;
4376 default:
4377 return -EOPNOTSUPP;
4378 }
4379
4380 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4381 req->ie_len, GFP_KERNEL);
4382 if (!auth_data)
4383 return -ENOMEM;
4384
4385 auth_data->bss = req->bss;
4386
4387 if (req->sae_data_len >= 4) {
4388 __le16 *pos = (__le16 *) req->sae_data;
4389 auth_data->sae_trans = le16_to_cpu(pos[0]);
4390 auth_data->sae_status = le16_to_cpu(pos[1]);
4391 memcpy(auth_data->data, req->sae_data + 4,
4392 req->sae_data_len - 4);
4393 auth_data->data_len += req->sae_data_len - 4;
4394 }
4395
4396 if (req->ie && req->ie_len) {
4397 memcpy(&auth_data->data[auth_data->data_len],
4398 req->ie, req->ie_len);
4399 auth_data->data_len += req->ie_len;
4400 }
4401
4402 if (req->key && req->key_len) {
4403 auth_data->key_len = req->key_len;
4404 auth_data->key_idx = req->key_idx;
4405 memcpy(auth_data->key, req->key, req->key_len);
4406 }
4407
4408 auth_data->algorithm = auth_alg;
4409
4410 /* try to authenticate/probe */
4411
4412 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4413 ifmgd->assoc_data) {
4414 err = -EBUSY;
4415 goto err_free;
4416 }
4417
4418 if (ifmgd->auth_data)
4419 ieee80211_destroy_auth_data(sdata, false);
4420
4421 /* prep auth_data so we don't go into idle on disassoc */
4422 ifmgd->auth_data = auth_data;
4423
4424 if (ifmgd->associated) {
4425 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4426
4427 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4428 WLAN_REASON_UNSPECIFIED,
4429 false, frame_buf);
4430
4431 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4432 sizeof(frame_buf));
4433 }
4434
4435 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4436
4437 err = ieee80211_prep_connection(sdata, req->bss, false);
4438 if (err)
4439 goto err_clear;
4440
4441 err = ieee80211_probe_auth(sdata);
4442 if (err) {
4443 sta_info_destroy_addr(sdata, req->bss->bssid);
4444 goto err_clear;
4445 }
4446
4447 /* hold our own reference */
4448 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4449 return 0;
4450
4451 err_clear:
4452 memset(ifmgd->bssid, 0, ETH_ALEN);
4453 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4454 ifmgd->auth_data = NULL;
4455 err_free:
4456 kfree(auth_data);
4457 return err;
4458 }
4459
4460 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4461 const u8 *wmm_param, int len)
4462 {
4463 const u8 *pos;
4464 size_t left;
4465
4466 if (len < 8)
4467 return false;
4468
4469 if (wmm_param[5] != 1 /* version */)
4470 return false;
4471
4472 pos = wmm_param + 8;
4473 left = len - 8;
4474
4475 for (; left >= 4; left -= 4, pos += 4) {
4476 u8 aifsn = pos[0] & 0x0f;
4477 u8 ecwmin = pos[1] & 0x0f;
4478 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4479 int aci = (pos[0] >> 5) & 0x03;
4480
4481 if (aifsn < 2) {
4482 sdata_info(sdata,
4483 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4484 aifsn, aci);
4485 return false;
4486 }
4487 if (ecwmin > ecwmax) {
4488 sdata_info(sdata,
4489 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4490 ecwmin, ecwmax, aci);
4491 return false;
4492 }
4493 }
4494
4495 return true;
4496 }
4497
4498 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4499 struct cfg80211_assoc_request *req)
4500 {
4501 struct ieee80211_local *local = sdata->local;
4502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4503 struct ieee80211_bss *bss = (void *)req->bss->priv;
4504 struct ieee80211_mgd_assoc_data *assoc_data;
4505 const struct cfg80211_bss_ies *beacon_ies;
4506 struct ieee80211_supported_band *sband;
4507 const u8 *ssidie, *ht_ie, *vht_ie;
4508 int i, err;
4509
4510 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4511 if (!assoc_data)
4512 return -ENOMEM;
4513
4514 rcu_read_lock();
4515 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4516 if (!ssidie) {
4517 rcu_read_unlock();
4518 kfree(assoc_data);
4519 return -EINVAL;
4520 }
4521 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4522 assoc_data->ssid_len = ssidie[1];
4523 rcu_read_unlock();
4524
4525 if (ifmgd->associated) {
4526 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4527
4528 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4529 WLAN_REASON_UNSPECIFIED,
4530 false, frame_buf);
4531
4532 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4533 sizeof(frame_buf));
4534 }
4535
4536 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4537 err = -EBUSY;
4538 goto err_free;
4539 }
4540
4541 if (ifmgd->assoc_data) {
4542 err = -EBUSY;
4543 goto err_free;
4544 }
4545
4546 if (ifmgd->auth_data) {
4547 bool match;
4548
4549 /* keep sta info, bssid if matching */
4550 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4551 ieee80211_destroy_auth_data(sdata, match);
4552 }
4553
4554 /* prepare assoc data */
4555
4556 ifmgd->beacon_crc_valid = false;
4557
4558 assoc_data->wmm = bss->wmm_used &&
4559 (local->hw.queues >= IEEE80211_NUM_ACS);
4560 if (assoc_data->wmm) {
4561 /* try to check validity of WMM params IE */
4562 const struct cfg80211_bss_ies *ies;
4563 const u8 *wp, *start, *end;
4564
4565 rcu_read_lock();
4566 ies = rcu_dereference(req->bss->ies);
4567 start = ies->data;
4568 end = start + ies->len;
4569
4570 while (true) {
4571 wp = cfg80211_find_vendor_ie(
4572 WLAN_OUI_MICROSOFT,
4573 WLAN_OUI_TYPE_MICROSOFT_WMM,
4574 start, end - start);
4575 if (!wp)
4576 break;
4577 start = wp + wp[1] + 2;
4578 /* if this IE is too short, try the next */
4579 if (wp[1] <= 4)
4580 continue;
4581 /* if this IE is WMM params, we found what we wanted */
4582 if (wp[6] == 1)
4583 break;
4584 }
4585
4586 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4587 wp[1] - 2)) {
4588 assoc_data->wmm = false;
4589 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4590 }
4591 rcu_read_unlock();
4592 }
4593
4594 /*
4595 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4596 * We still associate in non-HT mode (11a/b/g) if any one of these
4597 * ciphers is configured as pairwise.
4598 * We can set this to true for non-11n hardware, that'll be checked
4599 * separately along with the peer capabilities.
4600 */
4601 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4602 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4603 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4604 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4605 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4606 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4607 netdev_info(sdata->dev,
4608 "disabling HT/VHT due to WEP/TKIP use\n");
4609 }
4610 }
4611
4612 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4613 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4614 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4615 }
4616
4617 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4618 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4619
4620 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4621 sband = local->hw.wiphy->bands[req->bss->channel->band];
4622 if (!sband->ht_cap.ht_supported ||
4623 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4624 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4625 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4626 if (!bss->wmm_used &&
4627 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4628 netdev_info(sdata->dev,
4629 "disabling HT as WMM/QoS is not supported by the AP\n");
4630 }
4631
4632 /* disable VHT if we don't support it or the AP doesn't use WMM */
4633 if (!sband->vht_cap.vht_supported ||
4634 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4635 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4636 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4637 if (!bss->wmm_used &&
4638 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4639 netdev_info(sdata->dev,
4640 "disabling VHT as WMM/QoS is not supported by the AP\n");
4641 }
4642
4643 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4644 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4645 sizeof(ifmgd->ht_capa_mask));
4646
4647 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4648 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4649 sizeof(ifmgd->vht_capa_mask));
4650
4651 if (req->ie && req->ie_len) {
4652 memcpy(assoc_data->ie, req->ie, req->ie_len);
4653 assoc_data->ie_len = req->ie_len;
4654 }
4655
4656 assoc_data->bss = req->bss;
4657
4658 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4659 if (ifmgd->powersave)
4660 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4661 else
4662 sdata->smps_mode = IEEE80211_SMPS_OFF;
4663 } else
4664 sdata->smps_mode = ifmgd->req_smps;
4665
4666 assoc_data->capability = req->bss->capability;
4667 assoc_data->supp_rates = bss->supp_rates;
4668 assoc_data->supp_rates_len = bss->supp_rates_len;
4669
4670 rcu_read_lock();
4671 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4672 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4673 assoc_data->ap_ht_param =
4674 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4675 else
4676 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4677 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4678 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4679 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4680 sizeof(struct ieee80211_vht_cap));
4681 else
4682 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4683 rcu_read_unlock();
4684
4685 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4686 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4687 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4688 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4689
4690 if (bss->wmm_used && bss->uapsd_supported &&
4691 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4692 assoc_data->uapsd = true;
4693 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4694 } else {
4695 assoc_data->uapsd = false;
4696 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4697 }
4698
4699 if (req->prev_bssid)
4700 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4701
4702 if (req->use_mfp) {
4703 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4704 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4705 } else {
4706 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4707 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4708 }
4709
4710 if (req->flags & ASSOC_REQ_USE_RRM)
4711 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4712 else
4713 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4714
4715 if (req->crypto.control_port)
4716 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4717 else
4718 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4719
4720 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4721 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4722 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4723 sdata->vif.type);
4724
4725 /* kick off associate process */
4726
4727 ifmgd->assoc_data = assoc_data;
4728 ifmgd->dtim_period = 0;
4729 ifmgd->have_beacon = false;
4730
4731 err = ieee80211_prep_connection(sdata, req->bss, true);
4732 if (err)
4733 goto err_clear;
4734
4735 rcu_read_lock();
4736 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4737
4738 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4739 !beacon_ies) {
4740 /*
4741 * Wait up to one beacon interval ...
4742 * should this be more if we miss one?
4743 */
4744 sdata_info(sdata, "waiting for beacon from %pM\n",
4745 ifmgd->bssid);
4746 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4747 assoc_data->timeout_started = true;
4748 assoc_data->need_beacon = true;
4749 } else if (beacon_ies) {
4750 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4751 beacon_ies->data,
4752 beacon_ies->len);
4753 u8 dtim_count = 0;
4754
4755 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4756 const struct ieee80211_tim_ie *tim;
4757 tim = (void *)(tim_ie + 2);
4758 ifmgd->dtim_period = tim->dtim_period;
4759 dtim_count = tim->dtim_count;
4760 }
4761 ifmgd->have_beacon = true;
4762 assoc_data->timeout = jiffies;
4763 assoc_data->timeout_started = true;
4764
4765 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4766 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4767 sdata->vif.bss_conf.sync_device_ts =
4768 bss->device_ts_beacon;
4769 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4770 }
4771 } else {
4772 assoc_data->timeout = jiffies;
4773 assoc_data->timeout_started = true;
4774 }
4775 rcu_read_unlock();
4776
4777 run_again(sdata, assoc_data->timeout);
4778
4779 if (bss->corrupt_data) {
4780 char *corrupt_type = "data";
4781 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4782 if (bss->corrupt_data &
4783 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4784 corrupt_type = "beacon and probe response";
4785 else
4786 corrupt_type = "beacon";
4787 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4788 corrupt_type = "probe response";
4789 sdata_info(sdata, "associating with AP with corrupt %s\n",
4790 corrupt_type);
4791 }
4792
4793 return 0;
4794 err_clear:
4795 memset(ifmgd->bssid, 0, ETH_ALEN);
4796 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4797 ifmgd->assoc_data = NULL;
4798 err_free:
4799 kfree(assoc_data);
4800 return err;
4801 }
4802
4803 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4804 struct cfg80211_deauth_request *req)
4805 {
4806 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4807 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4808 bool tx = !req->local_state_change;
4809
4810 if (ifmgd->auth_data &&
4811 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4812 sdata_info(sdata,
4813 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4814 req->bssid, req->reason_code,
4815 ieee80211_get_reason_code_string(req->reason_code));
4816
4817 drv_mgd_prepare_tx(sdata->local, sdata);
4818 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4819 IEEE80211_STYPE_DEAUTH,
4820 req->reason_code, tx,
4821 frame_buf);
4822 ieee80211_destroy_auth_data(sdata, false);
4823 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4824 IEEE80211_DEAUTH_FRAME_LEN);
4825
4826 return 0;
4827 }
4828
4829 if (ifmgd->associated &&
4830 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4831 sdata_info(sdata,
4832 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4833 req->bssid, req->reason_code,
4834 ieee80211_get_reason_code_string(req->reason_code));
4835
4836 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4837 req->reason_code, tx, frame_buf);
4838 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4839 IEEE80211_DEAUTH_FRAME_LEN);
4840 return 0;
4841 }
4842
4843 return -ENOTCONN;
4844 }
4845
4846 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4847 struct cfg80211_disassoc_request *req)
4848 {
4849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4850 u8 bssid[ETH_ALEN];
4851 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4852
4853 /*
4854 * cfg80211 should catch this ... but it's racy since
4855 * we can receive a disassoc frame, process it, hand it
4856 * to cfg80211 while that's in a locked section already
4857 * trying to tell us that the user wants to disconnect.
4858 */
4859 if (ifmgd->associated != req->bss)
4860 return -ENOLINK;
4861
4862 sdata_info(sdata,
4863 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4864 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4865
4866 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4867 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4868 req->reason_code, !req->local_state_change,
4869 frame_buf);
4870
4871 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4872 IEEE80211_DEAUTH_FRAME_LEN);
4873
4874 return 0;
4875 }
4876
4877 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4878 {
4879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4880
4881 /*
4882 * Make sure some work items will not run after this,
4883 * they will not do anything but might not have been
4884 * cancelled when disconnecting.
4885 */
4886 cancel_work_sync(&ifmgd->monitor_work);
4887 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4888 cancel_work_sync(&ifmgd->request_smps_work);
4889 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4890 cancel_work_sync(&ifmgd->chswitch_work);
4891 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4892
4893 sdata_lock(sdata);
4894 if (ifmgd->assoc_data) {
4895 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4896 ieee80211_destroy_assoc_data(sdata, false);
4897 cfg80211_assoc_timeout(sdata->dev, bss);
4898 }
4899 if (ifmgd->auth_data)
4900 ieee80211_destroy_auth_data(sdata, false);
4901 spin_lock_bh(&ifmgd->teardown_lock);
4902 if (ifmgd->teardown_skb) {
4903 kfree_skb(ifmgd->teardown_skb);
4904 ifmgd->teardown_skb = NULL;
4905 ifmgd->orig_teardown_skb = NULL;
4906 }
4907 spin_unlock_bh(&ifmgd->teardown_lock);
4908 del_timer_sync(&ifmgd->timer);
4909 sdata_unlock(sdata);
4910 }
4911
4912 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4913 enum nl80211_cqm_rssi_threshold_event rssi_event,
4914 gfp_t gfp)
4915 {
4916 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4917
4918 trace_api_cqm_rssi_notify(sdata, rssi_event);
4919
4920 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4921 }
4922 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4923
4924 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4925 {
4926 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4927
4928 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4929
4930 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4931 }
4932 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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