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Linux 4.1.16
[linux/fpc-iii.git] / net / mac80211 / mlme.c
bloba93906103f8b01607946356c8a7573d0909079cf
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 vht_chandef = *chandef;
182 goto out;
183 }
184
185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186 channel->band);
187 /* check that channel matches the right operating channel */
188 if (!tracking && channel->center_freq != ht_cfreq) {
189 /*
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
194 * it should be OK.
195 */
196 sdata_info(sdata,
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201 goto out;
202 }
203
204 /* check 40 MHz support, if we have it */
205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
210 break;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
214 break;
215 }
216 } else {
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
221 goto out;
222 }
223
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
226 goto out;
227 }
228
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232 channel->band);
233 vht_chandef.center_freq2 = 0;
234
235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
238 vht_chandef.center_freq1 = chandef->center_freq1;
239 break;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242 break;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245 break;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
251 channel->band);
252 break;
253 default:
254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
255 sdata_info(sdata,
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
264 sdata_info(sdata,
265 "AP VHT information is invalid, disable VHT\n");
266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271 ret = 0;
272 goto out;
273 }
274
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
277 sdata_info(sdata,
278 "AP VHT information doesn't match HT, disable VHT\n");
279 ret = IEEE80211_STA_DISABLE_VHT;
280 goto out;
281 }
282
283 *chandef = vht_chandef;
284
285 ret = 0;
286
287 out:
288 /*
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
299 * starts anew.
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301 *
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
305 */
306 if (tracking &&
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308 return ret;
309
310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
313
314 /*
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
321 */
322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
323 tracking ? 0 :
324 IEEE80211_CHAN_DISABLED)) {
325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
328 break;
329 }
330
331 ret |= ieee80211_chandef_downgrade(chandef);
332 }
333
334 if (chandef->width != vht_chandef.width && !tracking)
335 sdata_info(sdata,
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339 return ret;
340 }
341
342 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
344 const struct ieee80211_ht_cap *ht_cap,
345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
348 {
349 struct ieee80211_local *local = sdata->local;
350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
351 struct ieee80211_supported_band *sband;
352 struct ieee80211_channel *chan;
353 struct cfg80211_chan_def chandef;
354 u16 ht_opmode;
355 u32 flags;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
357 int ret;
358
359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
361 return 0;
362
363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365 vht_oper = NULL;
366
367 if (WARN_ON_ONCE(!sta))
368 return -EINVAL;
369
370 /*
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
373 */
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378 }
379
380 chan = sdata->vif.bss_conf.chandef.chan;
381 sband = local->hw.wiphy->bands[chan->band];
382
383 /* calculate new channel (type) based on HT/VHT operation IEs */
384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
386 &chandef, true);
387
388 /*
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
394 */
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
397 flags |= ieee80211_chandef_downgrade(&chandef);
398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
400 flags |= ieee80211_chandef_downgrade(&chandef);
401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
403 flags |= ieee80211_chandef_downgrade(&chandef);
404
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406 return 0;
407
408 sdata_info(sdata,
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
412
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
419 sdata_info(sdata,
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421 ifmgd->bssid);
422 return -EINVAL;
423 }
424
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
429 break;
430 case NL80211_CHAN_WIDTH_40:
431 new_sta_bw = IEEE80211_STA_RX_BW_40;
432 break;
433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
435 break;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
439 break;
440 default:
441 return -EINVAL;
442 }
443
444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
446
447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
451 }
452
453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454 if (ret) {
455 sdata_info(sdata,
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
457 ifmgd->bssid);
458 return ret;
459 }
460
461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
465 }
466
467 return 0;
468 }
469
470 /* frame sending functions */
471
472 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
473 struct sk_buff *skb, u8 ap_ht_param,
474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
477 {
478 u8 *pos;
479 u32 flags = channel->flags;
480 u16 cap;
481 struct ieee80211_sta_ht_cap ht_cap;
482
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
488 /* determine capability flags */
489 cap = ht_cap.cap;
490
491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
502 }
503 break;
504 }
505
506 /*
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
510 */
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
514 }
515
516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
518 switch (smps) {
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
521 WARN_ON(1);
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
533 break;
534 }
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539 }
540
541 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542 struct sk_buff *skb,
543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
545 {
546 u8 *pos;
547 u32 cap;
548 struct ieee80211_sta_vht_cap vht_cap;
549 u32 mask, ap_bf_sts, our_bf_sts;
550
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
555
556 /* determine capability flags */
557 cap = vht_cap.cap;
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
566 }
567
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
571 }
572
573 /*
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
576 */
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
585
586 if (ap_bf_sts < our_bf_sts) {
587 cap &= ~mask;
588 cap |= ap_bf_sts;
589 }
590
591 /* reserve and fill IE */
592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594 }
595
596 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597 {
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601 struct sk_buff *skb;
602 struct ieee80211_mgmt *mgmt;
603 u8 *pos, qos_info;
604 size_t offset = 0, noffset;
605 int i, count, rates_len, supp_rates_len, shift;
606 u16 capab;
607 struct ieee80211_supported_band *sband;
608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
610 u32 rate_flags, rates = 0;
611
612 sdata_assert_lock(sdata);
613
614 rcu_read_lock();
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
617 rcu_read_unlock();
618 return;
619 }
620 chan = chanctx_conf->def.chan;
621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
622 rcu_read_unlock();
623 sband = local->hw.wiphy->bands[chan->band];
624 shift = ieee80211_vif_get_shift(&sdata->vif);
625
626 if (assoc_data->supp_rates_len) {
627 /*
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
631 * b-only mode)...
632 */
633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
636 &rates);
637 } else {
638 /*
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
642 */
643 rates_len = 0;
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
646 != rate_flags)
647 continue;
648 rates |= BIT(i);
649 rates_len++;
650 }
651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695 skb_put(skb, 10);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 ETH_ALEN);
703 } else {
704 skb_put(skb, 4);
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
710 }
711
712 /* SSID */
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
721 supp_rates_len = 8;
722
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
726
727 count = 0;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 5 * (1 << shift));
732 *pos++ = (u8) rate;
733 if (++count == 8)
734 break;
735 }
736 }
737
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
742
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
745 int rate;
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747 5 * (1 << shift));
748 *pos++ = (u8) rate;
749 }
750 }
751 }
752
753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
759 /* max tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
761 }
762
763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
772 }
773 }
774
775 /* if present, add any custom IEs that go before HT */
776 if (assoc_data->ie_len) {
777 static const u8 before_ht[] = {
778 WLAN_EID_SSID,
779 WLAN_EID_SUPP_RATES,
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
783 WLAN_EID_RSN,
784 WLAN_EID_QOS_CAPA,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 };
791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
802 };
803
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805 assoc_data->ie_len,
806 before_ht,
807 ARRAY_SIZE(before_ht),
808 after_ric,
809 ARRAY_SIZE(after_ric),
810 offset);
811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813 offset = noffset;
814 }
815
816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
822 sband, chan, sdata->smps_mode);
823
824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
827 WLAN_EID_SSID,
828 WLAN_EID_SUPP_RATES,
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
832 WLAN_EID_RSN,
833 WLAN_EID_QOS_CAPA,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
843 };
844
845 /* RIC already taken above, so no need to handle here anymore */
846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
857
858 /* if present, add any custom non-vendor IEs that go after HT */
859 if (assoc_data->ie_len) {
860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861 assoc_data->ie_len,
862 offset);
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865 offset = noffset;
866 }
867
868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873 } else {
874 qos_info = 0;
875 }
876
877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
878 }
879
880 /* add any remaining custom (i.e. vendor specific here) IEs */
881 if (assoc_data->ie_len) {
882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 }
886
887 drv_mgd_prepare_tx(local, sdata);
888
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
893 ieee80211_tx_skb(sdata, skb);
894 }
895
896 void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
898 {
899 struct ieee80211_pspoll *pspoll;
900 struct sk_buff *skb;
901
902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903 if (!skb)
904 return;
905
906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
908
909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
911 }
912
913 void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
915 int powersave)
916 {
917 struct sk_buff *skb;
918 struct ieee80211_hdr_3addr *nullfunc;
919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
920
921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922 if (!skb)
923 return;
924
925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
926 if (powersave)
927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
928
929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
931
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
938 ieee80211_tx_skb(sdata, skb);
939 }
940
941 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
943 {
944 struct sk_buff *skb;
945 struct ieee80211_hdr *nullfunc;
946 __le16 fc;
947
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949 return;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
952 if (!skb)
953 return;
954
955 skb_reserve(skb, local->hw.extra_tx_headroom);
956
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
969 }
970
971 /* spectrum management related things */
972 static void ieee80211_chswitch_work(struct work_struct *work)
973 {
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
976 struct ieee80211_local *local = sdata->local;
977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
978 int ret;
979
980 if (!ieee80211_sdata_running(sdata))
981 return;
982
983 sdata_lock(sdata);
984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
986
987 if (!ifmgd->associated)
988 goto out;
989
990 if (!sdata->vif.csa_active)
991 goto out;
992
993 /*
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
998 */
999
1000 if (sdata->reserved_chanctx) {
1001 /*
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1004 * reservations
1005 */
1006 if (sdata->reserved_ready)
1007 goto out;
1008
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1010 if (ret) {
1011 sdata_info(sdata,
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ret);
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1016 goto out;
1017 }
1018
1019 goto out;
1020 }
1021
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
1024 sdata_info(sdata,
1025 "failed to finalize channel switch, disconnecting\n");
1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 goto out;
1029 }
1030
1031 /* XXX: shouldn't really modify cfg80211-owned data! */
1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
1033
1034 ifmgd->csa_waiting_bcn = true;
1035
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1038
1039 out:
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1043 }
1044
1045 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046 {
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049 int ret;
1050
1051 sdata_assert_lock(sdata);
1052
1053 WARN_ON(!sdata->vif.csa_active);
1054
1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1059 }
1060
1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1063
1064 ret = drv_post_channel_switch(sdata);
1065 if (ret) {
1066 sdata_info(sdata,
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
1070 return;
1071 }
1072
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1074 }
1075
1076 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077 {
1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080
1081 trace_api_chswitch_done(sdata, success);
1082 if (!success) {
1083 sdata_info(sdata,
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1087 } else {
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1089 }
1090 }
1091 EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
1093 static void ieee80211_chswitch_timer(unsigned long data)
1094 {
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
1097
1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1099 }
1100
1101 static void
1102 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1103 u64 timestamp, u32 device_timestamp,
1104 struct ieee802_11_elems *elems,
1105 bool beacon)
1106 {
1107 struct ieee80211_local *local = sdata->local;
1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1109 struct cfg80211_bss *cbss = ifmgd->associated;
1110 struct ieee80211_chanctx_conf *conf;
1111 struct ieee80211_chanctx *chanctx;
1112 enum ieee80211_band current_band;
1113 struct ieee80211_csa_ie csa_ie;
1114 struct ieee80211_channel_switch ch_switch;
1115 int res;
1116
1117 sdata_assert_lock(sdata);
1118
1119 if (!cbss)
1120 return;
1121
1122 if (local->scanning)
1123 return;
1124
1125 /* disregard subsequent announcements if we are already processing */
1126 if (sdata->vif.csa_active)
1127 return;
1128
1129 current_band = cbss->channel->band;
1130 memset(&csa_ie, 0, sizeof(csa_ie));
1131 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1132 ifmgd->flags,
1133 ifmgd->associated->bssid, &csa_ie);
1134 if (res < 0)
1135 ieee80211_queue_work(&local->hw,
1136 &ifmgd->csa_connection_drop_work);
1137 if (res)
1138 return;
1139
1140 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1141 IEEE80211_CHAN_DISABLED)) {
1142 sdata_info(sdata,
1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1144 ifmgd->associated->bssid,
1145 csa_ie.chandef.chan->center_freq,
1146 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147 csa_ie.chandef.center_freq2);
1148 ieee80211_queue_work(&local->hw,
1149 &ifmgd->csa_connection_drop_work);
1150 return;
1151 }
1152
1153 if (cfg80211_chandef_identical(&csa_ie.chandef,
1154 &sdata->vif.bss_conf.chandef)) {
1155 if (ifmgd->csa_ignored_same_chan)
1156 return;
1157 sdata_info(sdata,
1158 "AP %pM tries to chanswitch to same channel, ignore\n",
1159 ifmgd->associated->bssid);
1160 ifmgd->csa_ignored_same_chan = true;
1161 return;
1162 }
1163
1164 mutex_lock(&local->mtx);
1165 mutex_lock(&local->chanctx_mtx);
1166 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1167 lockdep_is_held(&local->chanctx_mtx));
1168 if (!conf) {
1169 sdata_info(sdata,
1170 "no channel context assigned to vif?, disconnecting\n");
1171 goto drop_connection;
1172 }
1173
1174 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1175
1176 if (local->use_chanctx &&
1177 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1178 sdata_info(sdata,
1179 "driver doesn't support chan-switch with channel contexts\n");
1180 goto drop_connection;
1181 }
1182
1183 ch_switch.timestamp = timestamp;
1184 ch_switch.device_timestamp = device_timestamp;
1185 ch_switch.block_tx = csa_ie.mode;
1186 ch_switch.chandef = csa_ie.chandef;
1187 ch_switch.count = csa_ie.count;
1188
1189 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1190 sdata_info(sdata,
1191 "preparing for channel switch failed, disconnecting\n");
1192 goto drop_connection;
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 goto drop_connection;
1202 }
1203 mutex_unlock(&local->chanctx_mtx);
1204
1205 sdata->vif.csa_active = true;
1206 sdata->csa_chandef = csa_ie.chandef;
1207 sdata->csa_block_tx = csa_ie.mode;
1208 ifmgd->csa_ignored_same_chan = false;
1209
1210 if (sdata->csa_block_tx)
1211 ieee80211_stop_vif_queues(local, sdata,
1212 IEEE80211_QUEUE_STOP_REASON_CSA);
1213 mutex_unlock(&local->mtx);
1214
1215 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1216 csa_ie.count);
1217
1218 if (local->ops->channel_switch) {
1219 /* use driver's channel switch callback */
1220 drv_channel_switch(local, sdata, &ch_switch);
1221 return;
1222 }
1223
1224 /* channel switch handled in software */
1225 if (csa_ie.count <= 1)
1226 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1227 else
1228 mod_timer(&ifmgd->chswitch_timer,
1229 TU_TO_EXP_TIME((csa_ie.count - 1) *
1230 cbss->beacon_interval));
1231 return;
1232 drop_connection:
1233 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1234 mutex_unlock(&local->chanctx_mtx);
1235 mutex_unlock(&local->mtx);
1236 }
1237
1238 static bool
1239 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1240 struct ieee80211_channel *channel,
1241 const u8 *country_ie, u8 country_ie_len,
1242 const u8 *pwr_constr_elem,
1243 int *chan_pwr, int *pwr_reduction)
1244 {
1245 struct ieee80211_country_ie_triplet *triplet;
1246 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1247 int i, chan_increment;
1248 bool have_chan_pwr = false;
1249
1250 /* Invalid IE */
1251 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1252 return false;
1253
1254 triplet = (void *)(country_ie + 3);
1255 country_ie_len -= 3;
1256
1257 switch (channel->band) {
1258 default:
1259 WARN_ON_ONCE(1);
1260 /* fall through */
1261 case IEEE80211_BAND_2GHZ:
1262 case IEEE80211_BAND_60GHZ:
1263 chan_increment = 1;
1264 break;
1265 case IEEE80211_BAND_5GHZ:
1266 chan_increment = 4;
1267 break;
1268 }
1269
1270 /* find channel */
1271 while (country_ie_len >= 3) {
1272 u8 first_channel = triplet->chans.first_channel;
1273
1274 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1275 goto next;
1276
1277 for (i = 0; i < triplet->chans.num_channels; i++) {
1278 if (first_channel + i * chan_increment == chan) {
1279 have_chan_pwr = true;
1280 *chan_pwr = triplet->chans.max_power;
1281 break;
1282 }
1283 }
1284 if (have_chan_pwr)
1285 break;
1286
1287 next:
1288 triplet++;
1289 country_ie_len -= 3;
1290 }
1291
1292 if (have_chan_pwr && pwr_constr_elem)
1293 *pwr_reduction = *pwr_constr_elem;
1294 else
1295 *pwr_reduction = 0;
1296
1297 return have_chan_pwr;
1298 }
1299
1300 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_channel *channel,
1302 const u8 *cisco_dtpc_ie,
1303 int *pwr_level)
1304 {
1305 /* From practical testing, the first data byte of the DTPC element
1306 * seems to contain the requested dBm level, and the CLI on Cisco
1307 * APs clearly state the range is -127 to 127 dBm, which indicates
1308 * a signed byte, although it seemingly never actually goes negative.
1309 * The other byte seems to always be zero.
1310 */
1311 *pwr_level = (__s8)cisco_dtpc_ie[4];
1312 }
1313
1314 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1315 struct ieee80211_channel *channel,
1316 struct ieee80211_mgmt *mgmt,
1317 const u8 *country_ie, u8 country_ie_len,
1318 const u8 *pwr_constr_ie,
1319 const u8 *cisco_dtpc_ie)
1320 {
1321 bool has_80211h_pwr = false, has_cisco_pwr = false;
1322 int chan_pwr = 0, pwr_reduction_80211h = 0;
1323 int pwr_level_cisco, pwr_level_80211h;
1324 int new_ap_level;
1325 __le16 capab = mgmt->u.probe_resp.capab_info;
1326
1327 if (country_ie &&
1328 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1329 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1330 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1331 sdata, channel, country_ie, country_ie_len,
1332 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1333 pwr_level_80211h =
1334 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1335 }
1336
1337 if (cisco_dtpc_ie) {
1338 ieee80211_find_cisco_dtpc(
1339 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1340 has_cisco_pwr = true;
1341 }
1342
1343 if (!has_80211h_pwr && !has_cisco_pwr)
1344 return 0;
1345
1346 /* If we have both 802.11h and Cisco DTPC, apply both limits
1347 * by picking the smallest of the two power levels advertised.
1348 */
1349 if (has_80211h_pwr &&
1350 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1351 sdata_dbg(sdata,
1352 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1353 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1354 sdata->u.mgd.bssid);
1355 new_ap_level = pwr_level_80211h;
1356 } else { /* has_cisco_pwr is always true here. */
1357 sdata_dbg(sdata,
1358 "Limiting TX power to %d dBm as advertised by %pM\n",
1359 pwr_level_cisco, sdata->u.mgd.bssid);
1360 new_ap_level = pwr_level_cisco;
1361 }
1362
1363 if (sdata->ap_power_level == new_ap_level)
1364 return 0;
1365
1366 sdata->ap_power_level = new_ap_level;
1367 if (__ieee80211_recalc_txpower(sdata))
1368 return BSS_CHANGED_TXPOWER;
1369 return 0;
1370 }
1371
1372 /* powersave */
1373 static void ieee80211_enable_ps(struct ieee80211_local *local,
1374 struct ieee80211_sub_if_data *sdata)
1375 {
1376 struct ieee80211_conf *conf = &local->hw.conf;
1377
1378 /*
1379 * If we are scanning right now then the parameters will
1380 * take effect when scan finishes.
1381 */
1382 if (local->scanning)
1383 return;
1384
1385 if (conf->dynamic_ps_timeout > 0 &&
1386 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1387 mod_timer(&local->dynamic_ps_timer, jiffies +
1388 msecs_to_jiffies(conf->dynamic_ps_timeout));
1389 } else {
1390 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1391 ieee80211_send_nullfunc(local, sdata, 1);
1392
1393 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1394 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1395 return;
1396
1397 conf->flags |= IEEE80211_CONF_PS;
1398 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1399 }
1400 }
1401
1402 static void ieee80211_change_ps(struct ieee80211_local *local)
1403 {
1404 struct ieee80211_conf *conf = &local->hw.conf;
1405
1406 if (local->ps_sdata) {
1407 ieee80211_enable_ps(local, local->ps_sdata);
1408 } else if (conf->flags & IEEE80211_CONF_PS) {
1409 conf->flags &= ~IEEE80211_CONF_PS;
1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1411 del_timer_sync(&local->dynamic_ps_timer);
1412 cancel_work_sync(&local->dynamic_ps_enable_work);
1413 }
1414 }
1415
1416 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1417 {
1418 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1419 struct sta_info *sta = NULL;
1420 bool authorized = false;
1421
1422 if (!mgd->powersave)
1423 return false;
1424
1425 if (mgd->broken_ap)
1426 return false;
1427
1428 if (!mgd->associated)
1429 return false;
1430
1431 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1432 return false;
1433
1434 if (!mgd->have_beacon)
1435 return false;
1436
1437 rcu_read_lock();
1438 sta = sta_info_get(sdata, mgd->bssid);
1439 if (sta)
1440 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1441 rcu_read_unlock();
1442
1443 return authorized;
1444 }
1445
1446 /* need to hold RTNL or interface lock */
1447 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1448 {
1449 struct ieee80211_sub_if_data *sdata, *found = NULL;
1450 int count = 0;
1451 int timeout;
1452
1453 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1454 local->ps_sdata = NULL;
1455 return;
1456 }
1457
1458 list_for_each_entry(sdata, &local->interfaces, list) {
1459 if (!ieee80211_sdata_running(sdata))
1460 continue;
1461 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1462 /* If an AP vif is found, then disable PS
1463 * by setting the count to zero thereby setting
1464 * ps_sdata to NULL.
1465 */
1466 count = 0;
1467 break;
1468 }
1469 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1470 continue;
1471 found = sdata;
1472 count++;
1473 }
1474
1475 if (count == 1 && ieee80211_powersave_allowed(found)) {
1476 s32 beaconint_us;
1477
1478 if (latency < 0)
1479 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1480
1481 beaconint_us = ieee80211_tu_to_usec(
1482 found->vif.bss_conf.beacon_int);
1483
1484 timeout = local->dynamic_ps_forced_timeout;
1485 if (timeout < 0) {
1486 /*
1487 * Go to full PSM if the user configures a very low
1488 * latency requirement.
1489 * The 2000 second value is there for compatibility
1490 * until the PM_QOS_NETWORK_LATENCY is configured
1491 * with real values.
1492 */
1493 if (latency > (1900 * USEC_PER_MSEC) &&
1494 latency != (2000 * USEC_PER_SEC))
1495 timeout = 0;
1496 else
1497 timeout = 100;
1498 }
1499 local->hw.conf.dynamic_ps_timeout = timeout;
1500
1501 if (beaconint_us > latency) {
1502 local->ps_sdata = NULL;
1503 } else {
1504 int maxslp = 1;
1505 u8 dtimper = found->u.mgd.dtim_period;
1506
1507 /* If the TIM IE is invalid, pretend the value is 1 */
1508 if (!dtimper)
1509 dtimper = 1;
1510 else if (dtimper > 1)
1511 maxslp = min_t(int, dtimper,
1512 latency / beaconint_us);
1513
1514 local->hw.conf.max_sleep_period = maxslp;
1515 local->hw.conf.ps_dtim_period = dtimper;
1516 local->ps_sdata = found;
1517 }
1518 } else {
1519 local->ps_sdata = NULL;
1520 }
1521
1522 ieee80211_change_ps(local);
1523 }
1524
1525 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1526 {
1527 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1528
1529 if (sdata->vif.bss_conf.ps != ps_allowed) {
1530 sdata->vif.bss_conf.ps = ps_allowed;
1531 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1532 }
1533 }
1534
1535 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1536 {
1537 struct ieee80211_local *local =
1538 container_of(work, struct ieee80211_local,
1539 dynamic_ps_disable_work);
1540
1541 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1542 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1543 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1544 }
1545
1546 ieee80211_wake_queues_by_reason(&local->hw,
1547 IEEE80211_MAX_QUEUE_MAP,
1548 IEEE80211_QUEUE_STOP_REASON_PS,
1549 false);
1550 }
1551
1552 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1553 {
1554 struct ieee80211_local *local =
1555 container_of(work, struct ieee80211_local,
1556 dynamic_ps_enable_work);
1557 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1558 struct ieee80211_if_managed *ifmgd;
1559 unsigned long flags;
1560 int q;
1561
1562 /* can only happen when PS was just disabled anyway */
1563 if (!sdata)
1564 return;
1565
1566 ifmgd = &sdata->u.mgd;
1567
1568 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1569 return;
1570
1571 if (local->hw.conf.dynamic_ps_timeout > 0) {
1572 /* don't enter PS if TX frames are pending */
1573 if (drv_tx_frames_pending(local)) {
1574 mod_timer(&local->dynamic_ps_timer, jiffies +
1575 msecs_to_jiffies(
1576 local->hw.conf.dynamic_ps_timeout));
1577 return;
1578 }
1579
1580 /*
1581 * transmission can be stopped by others which leads to
1582 * dynamic_ps_timer expiry. Postpone the ps timer if it
1583 * is not the actual idle state.
1584 */
1585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1586 for (q = 0; q < local->hw.queues; q++) {
1587 if (local->queue_stop_reasons[q]) {
1588 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1589 flags);
1590 mod_timer(&local->dynamic_ps_timer, jiffies +
1591 msecs_to_jiffies(
1592 local->hw.conf.dynamic_ps_timeout));
1593 return;
1594 }
1595 }
1596 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1597 }
1598
1599 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1600 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1601 if (drv_tx_frames_pending(local)) {
1602 mod_timer(&local->dynamic_ps_timer, jiffies +
1603 msecs_to_jiffies(
1604 local->hw.conf.dynamic_ps_timeout));
1605 } else {
1606 ieee80211_send_nullfunc(local, sdata, 1);
1607 /* Flush to get the tx status of nullfunc frame */
1608 ieee80211_flush_queues(local, sdata, false);
1609 }
1610 }
1611
1612 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1613 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1614 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1615 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1616 local->hw.conf.flags |= IEEE80211_CONF_PS;
1617 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1618 }
1619 }
1620
1621 void ieee80211_dynamic_ps_timer(unsigned long data)
1622 {
1623 struct ieee80211_local *local = (void *) data;
1624
1625 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1626 }
1627
1628 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1629 {
1630 struct delayed_work *delayed_work =
1631 container_of(work, struct delayed_work, work);
1632 struct ieee80211_sub_if_data *sdata =
1633 container_of(delayed_work, struct ieee80211_sub_if_data,
1634 dfs_cac_timer_work);
1635 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1636
1637 mutex_lock(&sdata->local->mtx);
1638 if (sdata->wdev.cac_started) {
1639 ieee80211_vif_release_channel(sdata);
1640 cfg80211_cac_event(sdata->dev, &chandef,
1641 NL80211_RADAR_CAC_FINISHED,
1642 GFP_KERNEL);
1643 }
1644 mutex_unlock(&sdata->local->mtx);
1645 }
1646
1647 static bool
1648 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1649 {
1650 struct ieee80211_local *local = sdata->local;
1651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1652 bool ret = false;
1653 int ac;
1654
1655 if (local->hw.queues < IEEE80211_NUM_ACS)
1656 return false;
1657
1658 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1659 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1660 int non_acm_ac;
1661 unsigned long now = jiffies;
1662
1663 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1664 tx_tspec->admitted_time &&
1665 time_after(now, tx_tspec->time_slice_start + HZ)) {
1666 tx_tspec->consumed_tx_time = 0;
1667 tx_tspec->time_slice_start = now;
1668
1669 if (tx_tspec->downgraded)
1670 tx_tspec->action =
1671 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1672 }
1673
1674 switch (tx_tspec->action) {
1675 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1676 /* take the original parameters */
1677 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1678 sdata_err(sdata,
1679 "failed to set TX queue parameters for queue %d\n",
1680 ac);
1681 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1682 tx_tspec->downgraded = false;
1683 ret = true;
1684 break;
1685 case TX_TSPEC_ACTION_DOWNGRADE:
1686 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 ret = true;
1689 break;
1690 }
1691 /* downgrade next lower non-ACM AC */
1692 for (non_acm_ac = ac + 1;
1693 non_acm_ac < IEEE80211_NUM_ACS;
1694 non_acm_ac++)
1695 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1696 break;
1697 /* The loop will result in using BK even if it requires
1698 * admission control, such configuration makes no sense
1699 * and we have to transmit somehow - the AC selection
1700 * does the same thing.
1701 */
1702 if (drv_conf_tx(local, sdata, ac,
1703 &sdata->tx_conf[non_acm_ac]))
1704 sdata_err(sdata,
1705 "failed to set TX queue parameters for queue %d\n",
1706 ac);
1707 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1708 ret = true;
1709 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1710 tx_tspec->time_slice_start + HZ - now + 1);
1711 break;
1712 case TX_TSPEC_ACTION_NONE:
1713 /* nothing now */
1714 break;
1715 }
1716 }
1717
1718 return ret;
1719 }
1720
1721 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1722 {
1723 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1724 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1725 }
1726
1727 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1728 {
1729 struct ieee80211_sub_if_data *sdata;
1730
1731 sdata = container_of(work, struct ieee80211_sub_if_data,
1732 u.mgd.tx_tspec_wk.work);
1733 ieee80211_sta_handle_tspec_ac_params(sdata);
1734 }
1735
1736 /* MLME */
1737 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1738 struct ieee80211_sub_if_data *sdata,
1739 const u8 *wmm_param, size_t wmm_param_len)
1740 {
1741 struct ieee80211_tx_queue_params params;
1742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1743 size_t left;
1744 int count;
1745 const u8 *pos;
1746 u8 uapsd_queues = 0;
1747
1748 if (!local->ops->conf_tx)
1749 return false;
1750
1751 if (local->hw.queues < IEEE80211_NUM_ACS)
1752 return false;
1753
1754 if (!wmm_param)
1755 return false;
1756
1757 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1758 return false;
1759
1760 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1761 uapsd_queues = ifmgd->uapsd_queues;
1762
1763 count = wmm_param[6] & 0x0f;
1764 if (count == ifmgd->wmm_last_param_set)
1765 return false;
1766 ifmgd->wmm_last_param_set = count;
1767
1768 pos = wmm_param + 8;
1769 left = wmm_param_len - 8;
1770
1771 memset(&params, 0, sizeof(params));
1772
1773 sdata->wmm_acm = 0;
1774 for (; left >= 4; left -= 4, pos += 4) {
1775 int aci = (pos[0] >> 5) & 0x03;
1776 int acm = (pos[0] >> 4) & 0x01;
1777 bool uapsd = false;
1778 int queue;
1779
1780 switch (aci) {
1781 case 1: /* AC_BK */
1782 queue = 3;
1783 if (acm)
1784 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1785 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1786 uapsd = true;
1787 break;
1788 case 2: /* AC_VI */
1789 queue = 1;
1790 if (acm)
1791 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1793 uapsd = true;
1794 break;
1795 case 3: /* AC_VO */
1796 queue = 0;
1797 if (acm)
1798 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1799 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1800 uapsd = true;
1801 break;
1802 case 0: /* AC_BE */
1803 default:
1804 queue = 2;
1805 if (acm)
1806 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1807 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1808 uapsd = true;
1809 break;
1810 }
1811
1812 params.aifs = pos[0] & 0x0f;
1813 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1814 params.cw_min = ecw2cw(pos[1] & 0x0f);
1815 params.txop = get_unaligned_le16(pos + 2);
1816 params.acm = acm;
1817 params.uapsd = uapsd;
1818
1819 mlme_dbg(sdata,
1820 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1821 queue, aci, acm,
1822 params.aifs, params.cw_min, params.cw_max,
1823 params.txop, params.uapsd,
1824 ifmgd->tx_tspec[queue].downgraded);
1825 sdata->tx_conf[queue] = params;
1826 if (!ifmgd->tx_tspec[queue].downgraded &&
1827 drv_conf_tx(local, sdata, queue, &params))
1828 sdata_err(sdata,
1829 "failed to set TX queue parameters for queue %d\n",
1830 queue);
1831 }
1832
1833 /* enable WMM or activate new settings */
1834 sdata->vif.bss_conf.qos = true;
1835 return true;
1836 }
1837
1838 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1839 {
1840 lockdep_assert_held(&sdata->local->mtx);
1841
1842 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1843 ieee80211_run_deferred_scan(sdata->local);
1844 }
1845
1846 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1847 {
1848 mutex_lock(&sdata->local->mtx);
1849 __ieee80211_stop_poll(sdata);
1850 mutex_unlock(&sdata->local->mtx);
1851 }
1852
1853 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1854 u16 capab, bool erp_valid, u8 erp)
1855 {
1856 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1857 u32 changed = 0;
1858 bool use_protection;
1859 bool use_short_preamble;
1860 bool use_short_slot;
1861
1862 if (erp_valid) {
1863 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1864 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1865 } else {
1866 use_protection = false;
1867 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1868 }
1869
1870 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1871 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1872 use_short_slot = true;
1873
1874 if (use_protection != bss_conf->use_cts_prot) {
1875 bss_conf->use_cts_prot = use_protection;
1876 changed |= BSS_CHANGED_ERP_CTS_PROT;
1877 }
1878
1879 if (use_short_preamble != bss_conf->use_short_preamble) {
1880 bss_conf->use_short_preamble = use_short_preamble;
1881 changed |= BSS_CHANGED_ERP_PREAMBLE;
1882 }
1883
1884 if (use_short_slot != bss_conf->use_short_slot) {
1885 bss_conf->use_short_slot = use_short_slot;
1886 changed |= BSS_CHANGED_ERP_SLOT;
1887 }
1888
1889 return changed;
1890 }
1891
1892 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1893 struct cfg80211_bss *cbss,
1894 u32 bss_info_changed)
1895 {
1896 struct ieee80211_bss *bss = (void *)cbss->priv;
1897 struct ieee80211_local *local = sdata->local;
1898 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1899
1900 bss_info_changed |= BSS_CHANGED_ASSOC;
1901 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1902 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1903
1904 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1905 beacon_loss_count * bss_conf->beacon_int));
1906
1907 sdata->u.mgd.associated = cbss;
1908 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1909
1910 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1911
1912 if (sdata->vif.p2p) {
1913 const struct cfg80211_bss_ies *ies;
1914
1915 rcu_read_lock();
1916 ies = rcu_dereference(cbss->ies);
1917 if (ies) {
1918 int ret;
1919
1920 ret = cfg80211_get_p2p_attr(
1921 ies->data, ies->len,
1922 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1923 (u8 *) &bss_conf->p2p_noa_attr,
1924 sizeof(bss_conf->p2p_noa_attr));
1925 if (ret >= 2) {
1926 sdata->u.mgd.p2p_noa_index =
1927 bss_conf->p2p_noa_attr.index;
1928 bss_info_changed |= BSS_CHANGED_P2P_PS;
1929 }
1930 }
1931 rcu_read_unlock();
1932 }
1933
1934 /* just to be sure */
1935 ieee80211_stop_poll(sdata);
1936
1937 ieee80211_led_assoc(local, 1);
1938
1939 if (sdata->u.mgd.have_beacon) {
1940 /*
1941 * If the AP is buggy we may get here with no DTIM period
1942 * known, so assume it's 1 which is the only safe assumption
1943 * in that case, although if the TIM IE is broken powersave
1944 * probably just won't work at all.
1945 */
1946 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1947 bss_conf->beacon_rate = bss->beacon_rate;
1948 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1949 } else {
1950 bss_conf->beacon_rate = NULL;
1951 bss_conf->dtim_period = 0;
1952 }
1953
1954 bss_conf->assoc = 1;
1955
1956 /* Tell the driver to monitor connection quality (if supported) */
1957 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1958 bss_conf->cqm_rssi_thold)
1959 bss_info_changed |= BSS_CHANGED_CQM;
1960
1961 /* Enable ARP filtering */
1962 if (bss_conf->arp_addr_cnt)
1963 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1964
1965 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1966
1967 mutex_lock(&local->iflist_mtx);
1968 ieee80211_recalc_ps(local, -1);
1969 mutex_unlock(&local->iflist_mtx);
1970
1971 ieee80211_recalc_smps(sdata);
1972 ieee80211_recalc_ps_vif(sdata);
1973
1974 netif_carrier_on(sdata->dev);
1975 }
1976
1977 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1978 u16 stype, u16 reason, bool tx,
1979 u8 *frame_buf)
1980 {
1981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1982 struct ieee80211_local *local = sdata->local;
1983 u32 changed = 0;
1984
1985 sdata_assert_lock(sdata);
1986
1987 if (WARN_ON_ONCE(tx && !frame_buf))
1988 return;
1989
1990 if (WARN_ON(!ifmgd->associated))
1991 return;
1992
1993 ieee80211_stop_poll(sdata);
1994
1995 ifmgd->associated = NULL;
1996 netif_carrier_off(sdata->dev);
1997
1998 /*
1999 * if we want to get out of ps before disassoc (why?) we have
2000 * to do it before sending disassoc, as otherwise the null-packet
2001 * won't be valid.
2002 */
2003 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2004 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2005 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2006 }
2007 local->ps_sdata = NULL;
2008
2009 /* disable per-vif ps */
2010 ieee80211_recalc_ps_vif(sdata);
2011
2012 /* make sure ongoing transmission finishes */
2013 synchronize_net();
2014
2015 /*
2016 * drop any frame before deauth/disassoc, this can be data or
2017 * management frame. Since we are disconnecting, we should not
2018 * insist sending these frames which can take time and delay
2019 * the disconnection and possible the roaming.
2020 */
2021 if (tx)
2022 ieee80211_flush_queues(local, sdata, true);
2023
2024 /* deauthenticate/disassociate now */
2025 if (tx || frame_buf)
2026 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2027 reason, tx, frame_buf);
2028
2029 /* flush out frame - make sure the deauth was actually sent */
2030 if (tx)
2031 ieee80211_flush_queues(local, sdata, false);
2032
2033 /* clear bssid only after building the needed mgmt frames */
2034 eth_zero_addr(ifmgd->bssid);
2035
2036 /* remove AP and TDLS peers */
2037 sta_info_flush(sdata);
2038
2039 /* finally reset all BSS / config parameters */
2040 changed |= ieee80211_reset_erp_info(sdata);
2041
2042 ieee80211_led_assoc(local, 0);
2043 changed |= BSS_CHANGED_ASSOC;
2044 sdata->vif.bss_conf.assoc = false;
2045
2046 ifmgd->p2p_noa_index = -1;
2047 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2048 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2049
2050 /* on the next assoc, re-program HT/VHT parameters */
2051 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2052 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2053 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2054 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2055
2056 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2057
2058 del_timer_sync(&local->dynamic_ps_timer);
2059 cancel_work_sync(&local->dynamic_ps_enable_work);
2060
2061 /* Disable ARP filtering */
2062 if (sdata->vif.bss_conf.arp_addr_cnt)
2063 changed |= BSS_CHANGED_ARP_FILTER;
2064
2065 sdata->vif.bss_conf.qos = false;
2066 changed |= BSS_CHANGED_QOS;
2067
2068 /* The BSSID (not really interesting) and HT changed */
2069 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2070 ieee80211_bss_info_change_notify(sdata, changed);
2071
2072 /* disassociated - set to defaults now */
2073 ieee80211_set_wmm_default(sdata, false);
2074
2075 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2076 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2077 del_timer_sync(&sdata->u.mgd.timer);
2078 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2079
2080 sdata->vif.bss_conf.dtim_period = 0;
2081 sdata->vif.bss_conf.beacon_rate = NULL;
2082
2083 ifmgd->have_beacon = false;
2084
2085 ifmgd->flags = 0;
2086 mutex_lock(&local->mtx);
2087 ieee80211_vif_release_channel(sdata);
2088
2089 sdata->vif.csa_active = false;
2090 ifmgd->csa_waiting_bcn = false;
2091 ifmgd->csa_ignored_same_chan = false;
2092 if (sdata->csa_block_tx) {
2093 ieee80211_wake_vif_queues(local, sdata,
2094 IEEE80211_QUEUE_STOP_REASON_CSA);
2095 sdata->csa_block_tx = false;
2096 }
2097 mutex_unlock(&local->mtx);
2098
2099 /* existing TX TSPEC sessions no longer exist */
2100 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2101 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2102
2103 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2104 }
2105
2106 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2107 struct ieee80211_hdr *hdr)
2108 {
2109 /*
2110 * We can postpone the mgd.timer whenever receiving unicast frames
2111 * from AP because we know that the connection is working both ways
2112 * at that time. But multicast frames (and hence also beacons) must
2113 * be ignored here, because we need to trigger the timer during
2114 * data idle periods for sending the periodic probe request to the
2115 * AP we're connected to.
2116 */
2117 if (is_multicast_ether_addr(hdr->addr1))
2118 return;
2119
2120 ieee80211_sta_reset_conn_monitor(sdata);
2121 }
2122
2123 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2124 {
2125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2126 struct ieee80211_local *local = sdata->local;
2127
2128 mutex_lock(&local->mtx);
2129 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2130 goto out;
2131
2132 __ieee80211_stop_poll(sdata);
2133
2134 mutex_lock(&local->iflist_mtx);
2135 ieee80211_recalc_ps(local, -1);
2136 mutex_unlock(&local->iflist_mtx);
2137
2138 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2139 goto out;
2140
2141 /*
2142 * We've received a probe response, but are not sure whether
2143 * we have or will be receiving any beacons or data, so let's
2144 * schedule the timers again, just in case.
2145 */
2146 ieee80211_sta_reset_beacon_monitor(sdata);
2147
2148 mod_timer(&ifmgd->conn_mon_timer,
2149 round_jiffies_up(jiffies +
2150 IEEE80211_CONNECTION_IDLE_TIME));
2151 out:
2152 mutex_unlock(&local->mtx);
2153 }
2154
2155 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2156 struct ieee80211_hdr *hdr,
2157 u16 tx_time)
2158 {
2159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2160 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2161 int ac = ieee80211_ac_from_tid(tid);
2162 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2163 unsigned long now = jiffies;
2164
2165 if (likely(!tx_tspec->admitted_time))
2166 return;
2167
2168 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2169 tx_tspec->consumed_tx_time = 0;
2170 tx_tspec->time_slice_start = now;
2171
2172 if (tx_tspec->downgraded) {
2173 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2174 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2175 }
2176 }
2177
2178 if (tx_tspec->downgraded)
2179 return;
2180
2181 tx_tspec->consumed_tx_time += tx_time;
2182
2183 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2184 tx_tspec->downgraded = true;
2185 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2186 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2187 }
2188 }
2189
2190 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2191 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2192 {
2193 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2194
2195 if (!ieee80211_is_data(hdr->frame_control))
2196 return;
2197
2198 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2199 sdata->u.mgd.probe_send_count > 0) {
2200 if (ack)
2201 ieee80211_sta_reset_conn_monitor(sdata);
2202 else
2203 sdata->u.mgd.nullfunc_failed = true;
2204 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2205 return;
2206 }
2207
2208 if (ack)
2209 ieee80211_sta_reset_conn_monitor(sdata);
2210 }
2211
2212 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2213 {
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2215 const u8 *ssid;
2216 u8 *dst = ifmgd->associated->bssid;
2217 u8 unicast_limit = max(1, max_probe_tries - 3);
2218
2219 /*
2220 * Try sending broadcast probe requests for the last three
2221 * probe requests after the first ones failed since some
2222 * buggy APs only support broadcast probe requests.
2223 */
2224 if (ifmgd->probe_send_count >= unicast_limit)
2225 dst = NULL;
2226
2227 /*
2228 * When the hardware reports an accurate Tx ACK status, it's
2229 * better to send a nullfunc frame instead of a probe request,
2230 * as it will kick us off the AP quickly if we aren't associated
2231 * anymore. The timeout will be reset if the frame is ACKed by
2232 * the AP.
2233 */
2234 ifmgd->probe_send_count++;
2235
2236 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2237 ifmgd->nullfunc_failed = false;
2238 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2239 } else {
2240 int ssid_len;
2241
2242 rcu_read_lock();
2243 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2244 if (WARN_ON_ONCE(ssid == NULL))
2245 ssid_len = 0;
2246 else
2247 ssid_len = ssid[1];
2248
2249 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
2250 ssid + 2, ssid_len, NULL,
2251 0, (u32) -1, true, 0,
2252 ifmgd->associated->channel, false);
2253 rcu_read_unlock();
2254 }
2255
2256 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2257 run_again(sdata, ifmgd->probe_timeout);
2258 }
2259
2260 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2261 bool beacon)
2262 {
2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2264 bool already = false;
2265
2266 if (!ieee80211_sdata_running(sdata))
2267 return;
2268
2269 sdata_lock(sdata);
2270
2271 if (!ifmgd->associated)
2272 goto out;
2273
2274 mutex_lock(&sdata->local->mtx);
2275
2276 if (sdata->local->tmp_channel || sdata->local->scanning) {
2277 mutex_unlock(&sdata->local->mtx);
2278 goto out;
2279 }
2280
2281 if (beacon) {
2282 mlme_dbg_ratelimited(sdata,
2283 "detected beacon loss from AP (missed %d beacons) - probing\n",
2284 beacon_loss_count);
2285
2286 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2287 }
2288
2289 /*
2290 * The driver/our work has already reported this event or the
2291 * connection monitoring has kicked in and we have already sent
2292 * a probe request. Or maybe the AP died and the driver keeps
2293 * reporting until we disassociate...
2294 *
2295 * In either case we have to ignore the current call to this
2296 * function (except for setting the correct probe reason bit)
2297 * because otherwise we would reset the timer every time and
2298 * never check whether we received a probe response!
2299 */
2300 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2301 already = true;
2302
2303 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2304
2305 mutex_unlock(&sdata->local->mtx);
2306
2307 if (already)
2308 goto out;
2309
2310 mutex_lock(&sdata->local->iflist_mtx);
2311 ieee80211_recalc_ps(sdata->local, -1);
2312 mutex_unlock(&sdata->local->iflist_mtx);
2313
2314 ifmgd->probe_send_count = 0;
2315 ieee80211_mgd_probe_ap_send(sdata);
2316 out:
2317 sdata_unlock(sdata);
2318 }
2319
2320 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2321 struct ieee80211_vif *vif)
2322 {
2323 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2325 struct cfg80211_bss *cbss;
2326 struct sk_buff *skb;
2327 const u8 *ssid;
2328 int ssid_len;
2329
2330 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2331 return NULL;
2332
2333 sdata_assert_lock(sdata);
2334
2335 if (ifmgd->associated)
2336 cbss = ifmgd->associated;
2337 else if (ifmgd->auth_data)
2338 cbss = ifmgd->auth_data->bss;
2339 else if (ifmgd->assoc_data)
2340 cbss = ifmgd->assoc_data->bss;
2341 else
2342 return NULL;
2343
2344 rcu_read_lock();
2345 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2346 if (WARN_ON_ONCE(ssid == NULL))
2347 ssid_len = 0;
2348 else
2349 ssid_len = ssid[1];
2350
2351 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2352 (u32) -1, cbss->channel,
2353 ssid + 2, ssid_len,
2354 NULL, 0, true);
2355 rcu_read_unlock();
2356
2357 return skb;
2358 }
2359 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2360
2361 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2362 const u8 *buf, size_t len, bool tx,
2363 u16 reason)
2364 {
2365 struct ieee80211_event event = {
2366 .type = MLME_EVENT,
2367 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2368 .u.mlme.reason = reason,
2369 };
2370
2371 if (tx)
2372 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2373 else
2374 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2375
2376 drv_event_callback(sdata->local, sdata, &event);
2377 }
2378
2379 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2380 {
2381 struct ieee80211_local *local = sdata->local;
2382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2383 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2384
2385 sdata_lock(sdata);
2386 if (!ifmgd->associated) {
2387 sdata_unlock(sdata);
2388 return;
2389 }
2390
2391 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2392 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2393 true, frame_buf);
2394 mutex_lock(&local->mtx);
2395 sdata->vif.csa_active = false;
2396 ifmgd->csa_waiting_bcn = false;
2397 if (sdata->csa_block_tx) {
2398 ieee80211_wake_vif_queues(local, sdata,
2399 IEEE80211_QUEUE_STOP_REASON_CSA);
2400 sdata->csa_block_tx = false;
2401 }
2402 mutex_unlock(&local->mtx);
2403
2404 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2405 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2406
2407 sdata_unlock(sdata);
2408 }
2409
2410 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2411 {
2412 struct ieee80211_sub_if_data *sdata =
2413 container_of(work, struct ieee80211_sub_if_data,
2414 u.mgd.beacon_connection_loss_work);
2415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2416 struct sta_info *sta;
2417
2418 if (ifmgd->associated) {
2419 rcu_read_lock();
2420 sta = sta_info_get(sdata, ifmgd->bssid);
2421 if (sta)
2422 sta->beacon_loss_count++;
2423 rcu_read_unlock();
2424 }
2425
2426 if (ifmgd->connection_loss) {
2427 sdata_info(sdata, "Connection to AP %pM lost\n",
2428 ifmgd->bssid);
2429 __ieee80211_disconnect(sdata);
2430 } else {
2431 ieee80211_mgd_probe_ap(sdata, true);
2432 }
2433 }
2434
2435 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2436 {
2437 struct ieee80211_sub_if_data *sdata =
2438 container_of(work, struct ieee80211_sub_if_data,
2439 u.mgd.csa_connection_drop_work);
2440
2441 __ieee80211_disconnect(sdata);
2442 }
2443
2444 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2445 {
2446 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2447 struct ieee80211_hw *hw = &sdata->local->hw;
2448
2449 trace_api_beacon_loss(sdata);
2450
2451 sdata->u.mgd.connection_loss = false;
2452 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2453 }
2454 EXPORT_SYMBOL(ieee80211_beacon_loss);
2455
2456 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2457 {
2458 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2459 struct ieee80211_hw *hw = &sdata->local->hw;
2460
2461 trace_api_connection_loss(sdata);
2462
2463 sdata->u.mgd.connection_loss = true;
2464 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2465 }
2466 EXPORT_SYMBOL(ieee80211_connection_loss);
2467
2468
2469 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2470 bool assoc)
2471 {
2472 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2473
2474 sdata_assert_lock(sdata);
2475
2476 if (!assoc) {
2477 /*
2478 * we are not authenticated yet, the only timer that could be
2479 * running is the timeout for the authentication response which
2480 * which is not relevant anymore.
2481 */
2482 del_timer_sync(&sdata->u.mgd.timer);
2483 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2484
2485 eth_zero_addr(sdata->u.mgd.bssid);
2486 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2487 sdata->u.mgd.flags = 0;
2488 mutex_lock(&sdata->local->mtx);
2489 ieee80211_vif_release_channel(sdata);
2490 mutex_unlock(&sdata->local->mtx);
2491 }
2492
2493 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2494 kfree(auth_data);
2495 sdata->u.mgd.auth_data = NULL;
2496 }
2497
2498 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2499 struct ieee80211_mgmt *mgmt, size_t len)
2500 {
2501 struct ieee80211_local *local = sdata->local;
2502 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2503 u8 *pos;
2504 struct ieee802_11_elems elems;
2505 u32 tx_flags = 0;
2506
2507 pos = mgmt->u.auth.variable;
2508 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2509 if (!elems.challenge)
2510 return;
2511 auth_data->expected_transaction = 4;
2512 drv_mgd_prepare_tx(sdata->local, sdata);
2513 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2514 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2515 IEEE80211_TX_INTFL_MLME_CONN_TX;
2516 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2517 elems.challenge - 2, elems.challenge_len + 2,
2518 auth_data->bss->bssid, auth_data->bss->bssid,
2519 auth_data->key, auth_data->key_len,
2520 auth_data->key_idx, tx_flags);
2521 }
2522
2523 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2524 struct ieee80211_mgmt *mgmt, size_t len)
2525 {
2526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2527 u8 bssid[ETH_ALEN];
2528 u16 auth_alg, auth_transaction, status_code;
2529 struct sta_info *sta;
2530 struct ieee80211_event event = {
2531 .type = MLME_EVENT,
2532 .u.mlme.data = AUTH_EVENT,
2533 };
2534
2535 sdata_assert_lock(sdata);
2536
2537 if (len < 24 + 6)
2538 return;
2539
2540 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2541 return;
2542
2543 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2544
2545 if (!ether_addr_equal(bssid, mgmt->bssid))
2546 return;
2547
2548 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2549 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2550 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2551
2552 if (auth_alg != ifmgd->auth_data->algorithm ||
2553 auth_transaction != ifmgd->auth_data->expected_transaction) {
2554 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2555 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2556 auth_transaction,
2557 ifmgd->auth_data->expected_transaction);
2558 return;
2559 }
2560
2561 if (status_code != WLAN_STATUS_SUCCESS) {
2562 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2563 mgmt->sa, status_code);
2564 ieee80211_destroy_auth_data(sdata, false);
2565 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2566 event.u.mlme.status = MLME_DENIED;
2567 event.u.mlme.reason = status_code;
2568 drv_event_callback(sdata->local, sdata, &event);
2569 return;
2570 }
2571
2572 switch (ifmgd->auth_data->algorithm) {
2573 case WLAN_AUTH_OPEN:
2574 case WLAN_AUTH_LEAP:
2575 case WLAN_AUTH_FT:
2576 case WLAN_AUTH_SAE:
2577 break;
2578 case WLAN_AUTH_SHARED_KEY:
2579 if (ifmgd->auth_data->expected_transaction != 4) {
2580 ieee80211_auth_challenge(sdata, mgmt, len);
2581 /* need another frame */
2582 return;
2583 }
2584 break;
2585 default:
2586 WARN_ONCE(1, "invalid auth alg %d",
2587 ifmgd->auth_data->algorithm);
2588 return;
2589 }
2590
2591 event.u.mlme.status = MLME_SUCCESS;
2592 drv_event_callback(sdata->local, sdata, &event);
2593 sdata_info(sdata, "authenticated\n");
2594 ifmgd->auth_data->done = true;
2595 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2596 ifmgd->auth_data->timeout_started = true;
2597 run_again(sdata, ifmgd->auth_data->timeout);
2598
2599 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2600 ifmgd->auth_data->expected_transaction != 2) {
2601 /*
2602 * Report auth frame to user space for processing since another
2603 * round of Authentication frames is still needed.
2604 */
2605 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2606 return;
2607 }
2608
2609 /* move station state to auth */
2610 mutex_lock(&sdata->local->sta_mtx);
2611 sta = sta_info_get(sdata, bssid);
2612 if (!sta) {
2613 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2614 goto out_err;
2615 }
2616 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2617 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2618 goto out_err;
2619 }
2620 mutex_unlock(&sdata->local->sta_mtx);
2621
2622 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2623 return;
2624 out_err:
2625 mutex_unlock(&sdata->local->sta_mtx);
2626 /* ignore frame -- wait for timeout */
2627 }
2628
2629 #define case_WLAN(type) \
2630 case WLAN_REASON_##type: return #type
2631
2632 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2633 {
2634 switch (reason_code) {
2635 case_WLAN(UNSPECIFIED);
2636 case_WLAN(PREV_AUTH_NOT_VALID);
2637 case_WLAN(DEAUTH_LEAVING);
2638 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2639 case_WLAN(DISASSOC_AP_BUSY);
2640 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2641 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2642 case_WLAN(DISASSOC_STA_HAS_LEFT);
2643 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2644 case_WLAN(DISASSOC_BAD_POWER);
2645 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2646 case_WLAN(INVALID_IE);
2647 case_WLAN(MIC_FAILURE);
2648 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2649 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2650 case_WLAN(IE_DIFFERENT);
2651 case_WLAN(INVALID_GROUP_CIPHER);
2652 case_WLAN(INVALID_PAIRWISE_CIPHER);
2653 case_WLAN(INVALID_AKMP);
2654 case_WLAN(UNSUPP_RSN_VERSION);
2655 case_WLAN(INVALID_RSN_IE_CAP);
2656 case_WLAN(IEEE8021X_FAILED);
2657 case_WLAN(CIPHER_SUITE_REJECTED);
2658 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2659 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2660 case_WLAN(DISASSOC_LOW_ACK);
2661 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2662 case_WLAN(QSTA_LEAVE_QBSS);
2663 case_WLAN(QSTA_NOT_USE);
2664 case_WLAN(QSTA_REQUIRE_SETUP);
2665 case_WLAN(QSTA_TIMEOUT);
2666 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2667 case_WLAN(MESH_PEER_CANCELED);
2668 case_WLAN(MESH_MAX_PEERS);
2669 case_WLAN(MESH_CONFIG);
2670 case_WLAN(MESH_CLOSE);
2671 case_WLAN(MESH_MAX_RETRIES);
2672 case_WLAN(MESH_CONFIRM_TIMEOUT);
2673 case_WLAN(MESH_INVALID_GTK);
2674 case_WLAN(MESH_INCONSISTENT_PARAM);
2675 case_WLAN(MESH_INVALID_SECURITY);
2676 case_WLAN(MESH_PATH_ERROR);
2677 case_WLAN(MESH_PATH_NOFORWARD);
2678 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2679 case_WLAN(MAC_EXISTS_IN_MBSS);
2680 case_WLAN(MESH_CHAN_REGULATORY);
2681 case_WLAN(MESH_CHAN);
2682 default: return "<unknown>";
2683 }
2684 }
2685
2686 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2687 struct ieee80211_mgmt *mgmt, size_t len)
2688 {
2689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2690 const u8 *bssid = NULL;
2691 u16 reason_code;
2692
2693 sdata_assert_lock(sdata);
2694
2695 if (len < 24 + 2)
2696 return;
2697
2698 if (!ifmgd->associated ||
2699 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2700 return;
2701
2702 bssid = ifmgd->associated->bssid;
2703
2704 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2705
2706 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2707 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2708
2709 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2710
2711 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2712 }
2713
2714
2715 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2716 struct ieee80211_mgmt *mgmt, size_t len)
2717 {
2718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2719 u16 reason_code;
2720
2721 sdata_assert_lock(sdata);
2722
2723 if (len < 24 + 2)
2724 return;
2725
2726 if (!ifmgd->associated ||
2727 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2728 return;
2729
2730 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2731
2732 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2733 mgmt->sa, reason_code);
2734
2735 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2736
2737 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
2738 }
2739
2740 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2741 u8 *supp_rates, unsigned int supp_rates_len,
2742 u32 *rates, u32 *basic_rates,
2743 bool *have_higher_than_11mbit,
2744 int *min_rate, int *min_rate_index,
2745 int shift, u32 rate_flags)
2746 {
2747 int i, j;
2748
2749 for (i = 0; i < supp_rates_len; i++) {
2750 int rate = supp_rates[i] & 0x7f;
2751 bool is_basic = !!(supp_rates[i] & 0x80);
2752
2753 if ((rate * 5 * (1 << shift)) > 110)
2754 *have_higher_than_11mbit = true;
2755
2756 /*
2757 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2758 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2759 *
2760 * Note: Even through the membership selector and the basic
2761 * rate flag share the same bit, they are not exactly
2762 * the same.
2763 */
2764 if (!!(supp_rates[i] & 0x80) &&
2765 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2766 continue;
2767
2768 for (j = 0; j < sband->n_bitrates; j++) {
2769 struct ieee80211_rate *br;
2770 int brate;
2771
2772 br = &sband->bitrates[j];
2773 if ((rate_flags & br->flags) != rate_flags)
2774 continue;
2775
2776 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2777 if (brate == rate) {
2778 *rates |= BIT(j);
2779 if (is_basic)
2780 *basic_rates |= BIT(j);
2781 if ((rate * 5) < *min_rate) {
2782 *min_rate = rate * 5;
2783 *min_rate_index = j;
2784 }
2785 break;
2786 }
2787 }
2788 }
2789 }
2790
2791 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2792 bool assoc)
2793 {
2794 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2795
2796 sdata_assert_lock(sdata);
2797
2798 if (!assoc) {
2799 /*
2800 * we are not associated yet, the only timer that could be
2801 * running is the timeout for the association response which
2802 * which is not relevant anymore.
2803 */
2804 del_timer_sync(&sdata->u.mgd.timer);
2805 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2806
2807 eth_zero_addr(sdata->u.mgd.bssid);
2808 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2809 sdata->u.mgd.flags = 0;
2810 mutex_lock(&sdata->local->mtx);
2811 ieee80211_vif_release_channel(sdata);
2812 mutex_unlock(&sdata->local->mtx);
2813 }
2814
2815 kfree(assoc_data);
2816 sdata->u.mgd.assoc_data = NULL;
2817 }
2818
2819 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2820 struct cfg80211_bss *cbss,
2821 struct ieee80211_mgmt *mgmt, size_t len)
2822 {
2823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2824 struct ieee80211_local *local = sdata->local;
2825 struct ieee80211_supported_band *sband;
2826 struct sta_info *sta;
2827 u8 *pos;
2828 u16 capab_info, aid;
2829 struct ieee802_11_elems elems;
2830 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2831 const struct cfg80211_bss_ies *bss_ies = NULL;
2832 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2833 u32 changed = 0;
2834 int err;
2835 bool ret;
2836
2837 /* AssocResp and ReassocResp have identical structure */
2838
2839 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2840 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2841
2842 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2843 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2844 aid);
2845 aid &= ~(BIT(15) | BIT(14));
2846
2847 ifmgd->broken_ap = false;
2848
2849 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2850 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2851 aid);
2852 aid = 0;
2853 ifmgd->broken_ap = true;
2854 }
2855
2856 pos = mgmt->u.assoc_resp.variable;
2857 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2858
2859 if (!elems.supp_rates) {
2860 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2861 return false;
2862 }
2863
2864 ifmgd->aid = aid;
2865 ifmgd->tdls_chan_switch_prohibited =
2866 elems.ext_capab && elems.ext_capab_len >= 5 &&
2867 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2868
2869 /*
2870 * Some APs are erroneously not including some information in their
2871 * (re)association response frames. Try to recover by using the data
2872 * from the beacon or probe response. This seems to afflict mobile
2873 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2874 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2875 */
2876 if ((assoc_data->wmm && !elems.wmm_param) ||
2877 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2878 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2879 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2880 (!elems.vht_cap_elem || !elems.vht_operation))) {
2881 const struct cfg80211_bss_ies *ies;
2882 struct ieee802_11_elems bss_elems;
2883
2884 rcu_read_lock();
2885 ies = rcu_dereference(cbss->ies);
2886 if (ies)
2887 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2888 GFP_ATOMIC);
2889 rcu_read_unlock();
2890 if (!bss_ies)
2891 return false;
2892
2893 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2894 false, &bss_elems);
2895 if (assoc_data->wmm &&
2896 !elems.wmm_param && bss_elems.wmm_param) {
2897 elems.wmm_param = bss_elems.wmm_param;
2898 sdata_info(sdata,
2899 "AP bug: WMM param missing from AssocResp\n");
2900 }
2901
2902 /*
2903 * Also check if we requested HT/VHT, otherwise the AP doesn't
2904 * have to include the IEs in the (re)association response.
2905 */
2906 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2907 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2908 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2909 sdata_info(sdata,
2910 "AP bug: HT capability missing from AssocResp\n");
2911 }
2912 if (!elems.ht_operation && bss_elems.ht_operation &&
2913 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2914 elems.ht_operation = bss_elems.ht_operation;
2915 sdata_info(sdata,
2916 "AP bug: HT operation missing from AssocResp\n");
2917 }
2918 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2919 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2920 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2921 sdata_info(sdata,
2922 "AP bug: VHT capa missing from AssocResp\n");
2923 }
2924 if (!elems.vht_operation && bss_elems.vht_operation &&
2925 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2926 elems.vht_operation = bss_elems.vht_operation;
2927 sdata_info(sdata,
2928 "AP bug: VHT operation missing from AssocResp\n");
2929 }
2930 }
2931
2932 /*
2933 * We previously checked these in the beacon/probe response, so
2934 * they should be present here. This is just a safety net.
2935 */
2936 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2937 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2938 sdata_info(sdata,
2939 "HT AP is missing WMM params or HT capability/operation\n");
2940 ret = false;
2941 goto out;
2942 }
2943
2944 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2945 (!elems.vht_cap_elem || !elems.vht_operation)) {
2946 sdata_info(sdata,
2947 "VHT AP is missing VHT capability/operation\n");
2948 ret = false;
2949 goto out;
2950 }
2951
2952 mutex_lock(&sdata->local->sta_mtx);
2953 /*
2954 * station info was already allocated and inserted before
2955 * the association and should be available to us
2956 */
2957 sta = sta_info_get(sdata, cbss->bssid);
2958 if (WARN_ON(!sta)) {
2959 mutex_unlock(&sdata->local->sta_mtx);
2960 ret = false;
2961 goto out;
2962 }
2963
2964 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2965
2966 /* Set up internal HT/VHT capabilities */
2967 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2968 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2969 elems.ht_cap_elem, sta);
2970
2971 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2972 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2973 elems.vht_cap_elem, sta);
2974
2975 /*
2976 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2977 * in their association response, so ignore that data for our own
2978 * configuration. If it changed since the last beacon, we'll get the
2979 * next beacon and update then.
2980 */
2981
2982 /*
2983 * If an operating mode notification IE is present, override the
2984 * NSS calculation (that would be done in rate_control_rate_init())
2985 * and use the # of streams from that element.
2986 */
2987 if (elems.opmode_notif &&
2988 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2989 u8 nss;
2990
2991 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2992 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2993 nss += 1;
2994 sta->sta.rx_nss = nss;
2995 }
2996
2997 rate_control_rate_init(sta);
2998
2999 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
3000 set_sta_flag(sta, WLAN_STA_MFP);
3001 sta->sta.mfp = true;
3002 } else {
3003 sta->sta.mfp = false;
3004 }
3005
3006 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
3007
3008 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
3009 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3010 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3011 if (err) {
3012 sdata_info(sdata,
3013 "failed to move station %pM to desired state\n",
3014 sta->sta.addr);
3015 WARN_ON(__sta_info_destroy(sta));
3016 mutex_unlock(&sdata->local->sta_mtx);
3017 ret = false;
3018 goto out;
3019 }
3020
3021 mutex_unlock(&sdata->local->sta_mtx);
3022
3023 /*
3024 * Always handle WMM once after association regardless
3025 * of the first value the AP uses. Setting -1 here has
3026 * that effect because the AP values is an unsigned
3027 * 4-bit value.
3028 */
3029 ifmgd->wmm_last_param_set = -1;
3030
3031 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3032 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3033 elems.wmm_param_len);
3034 else
3035 ieee80211_set_wmm_default(sdata, false);
3036 changed |= BSS_CHANGED_QOS;
3037
3038 /* set AID and assoc capability,
3039 * ieee80211_set_associated() will tell the driver */
3040 bss_conf->aid = aid;
3041 bss_conf->assoc_capability = capab_info;
3042 ieee80211_set_associated(sdata, cbss, changed);
3043
3044 /*
3045 * If we're using 4-addr mode, let the AP know that we're
3046 * doing so, so that it can create the STA VLAN on its side
3047 */
3048 if (ifmgd->use_4addr)
3049 ieee80211_send_4addr_nullfunc(local, sdata);
3050
3051 /*
3052 * Start timer to probe the connection to the AP now.
3053 * Also start the timer that will detect beacon loss.
3054 */
3055 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3056 ieee80211_sta_reset_beacon_monitor(sdata);
3057
3058 ret = true;
3059 out:
3060 kfree(bss_ies);
3061 return ret;
3062 }
3063
3064 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3065 struct ieee80211_mgmt *mgmt,
3066 size_t len)
3067 {
3068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3069 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3070 u16 capab_info, status_code, aid;
3071 struct ieee802_11_elems elems;
3072 int ac, uapsd_queues = -1;
3073 u8 *pos;
3074 bool reassoc;
3075 struct cfg80211_bss *bss;
3076 struct ieee80211_event event = {
3077 .type = MLME_EVENT,
3078 .u.mlme.data = ASSOC_EVENT,
3079 };
3080
3081 sdata_assert_lock(sdata);
3082
3083 if (!assoc_data)
3084 return;
3085 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3086 return;
3087
3088 /*
3089 * AssocResp and ReassocResp have identical structure, so process both
3090 * of them in this function.
3091 */
3092
3093 if (len < 24 + 6)
3094 return;
3095
3096 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3097 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3098 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3099 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3100
3101 sdata_info(sdata,
3102 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3103 reassoc ? "Rea" : "A", mgmt->sa,
3104 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3105
3106 pos = mgmt->u.assoc_resp.variable;
3107 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3108
3109 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3110 elems.timeout_int &&
3111 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3112 u32 tu, ms;
3113 tu = le32_to_cpu(elems.timeout_int->value);
3114 ms = tu * 1024 / 1000;
3115 sdata_info(sdata,
3116 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3117 mgmt->sa, tu, ms);
3118 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3119 assoc_data->timeout_started = true;
3120 if (ms > IEEE80211_ASSOC_TIMEOUT)
3121 run_again(sdata, assoc_data->timeout);
3122 return;
3123 }
3124
3125 bss = assoc_data->bss;
3126
3127 if (status_code != WLAN_STATUS_SUCCESS) {
3128 sdata_info(sdata, "%pM denied association (code=%d)\n",
3129 mgmt->sa, status_code);
3130 ieee80211_destroy_assoc_data(sdata, false);
3131 event.u.mlme.status = MLME_DENIED;
3132 event.u.mlme.reason = status_code;
3133 drv_event_callback(sdata->local, sdata, &event);
3134 } else {
3135 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3136 /* oops -- internal error -- send timeout for now */
3137 ieee80211_destroy_assoc_data(sdata, false);
3138 cfg80211_assoc_timeout(sdata->dev, bss);
3139 return;
3140 }
3141 event.u.mlme.status = MLME_SUCCESS;
3142 drv_event_callback(sdata->local, sdata, &event);
3143 sdata_info(sdata, "associated\n");
3144
3145 /*
3146 * destroy assoc_data afterwards, as otherwise an idle
3147 * recalc after assoc_data is NULL but before associated
3148 * is set can cause the interface to go idle
3149 */
3150 ieee80211_destroy_assoc_data(sdata, true);
3151
3152 /* get uapsd queues configuration */
3153 uapsd_queues = 0;
3154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3155 if (sdata->tx_conf[ac].uapsd)
3156 uapsd_queues |= BIT(ac);
3157 }
3158
3159 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3160 }
3161
3162 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3163 struct ieee80211_mgmt *mgmt, size_t len,
3164 struct ieee80211_rx_status *rx_status,
3165 struct ieee802_11_elems *elems)
3166 {
3167 struct ieee80211_local *local = sdata->local;
3168 struct ieee80211_bss *bss;
3169 struct ieee80211_channel *channel;
3170
3171 sdata_assert_lock(sdata);
3172
3173 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3174 if (!channel)
3175 return;
3176
3177 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3178 channel);
3179 if (bss) {
3180 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3181 ieee80211_rx_bss_put(local, bss);
3182 }
3183 }
3184
3185
3186 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3187 struct sk_buff *skb)
3188 {
3189 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3190 struct ieee80211_if_managed *ifmgd;
3191 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3192 size_t baselen, len = skb->len;
3193 struct ieee802_11_elems elems;
3194
3195 ifmgd = &sdata->u.mgd;
3196
3197 sdata_assert_lock(sdata);
3198
3199 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3200 return; /* ignore ProbeResp to foreign address */
3201
3202 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3203 if (baselen > len)
3204 return;
3205
3206 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3207 false, &elems);
3208
3209 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3210
3211 if (ifmgd->associated &&
3212 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3213 ieee80211_reset_ap_probe(sdata);
3214
3215 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3216 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3217 /* got probe response, continue with auth */
3218 sdata_info(sdata, "direct probe responded\n");
3219 ifmgd->auth_data->tries = 0;
3220 ifmgd->auth_data->timeout = jiffies;
3221 ifmgd->auth_data->timeout_started = true;
3222 run_again(sdata, ifmgd->auth_data->timeout);
3223 }
3224 }
3225
3226 /*
3227 * This is the canonical list of information elements we care about,
3228 * the filter code also gives us all changes to the Microsoft OUI
3229 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3230 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3231 * changes to requested client power.
3232 *
3233 * We implement beacon filtering in software since that means we can
3234 * avoid processing the frame here and in cfg80211, and userspace
3235 * will not be able to tell whether the hardware supports it or not.
3236 *
3237 * XXX: This list needs to be dynamic -- userspace needs to be able to
3238 * add items it requires. It also needs to be able to tell us to
3239 * look out for other vendor IEs.
3240 */
3241 static const u64 care_about_ies =
3242 (1ULL << WLAN_EID_COUNTRY) |
3243 (1ULL << WLAN_EID_ERP_INFO) |
3244 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3245 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3246 (1ULL << WLAN_EID_HT_CAPABILITY) |
3247 (1ULL << WLAN_EID_HT_OPERATION) |
3248 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
3249
3250 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3251 struct ieee80211_mgmt *mgmt, size_t len,
3252 struct ieee80211_rx_status *rx_status)
3253 {
3254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3255 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3256 size_t baselen;
3257 struct ieee802_11_elems elems;
3258 struct ieee80211_local *local = sdata->local;
3259 struct ieee80211_chanctx_conf *chanctx_conf;
3260 struct ieee80211_channel *chan;
3261 struct sta_info *sta;
3262 u32 changed = 0;
3263 bool erp_valid;
3264 u8 erp_value = 0;
3265 u32 ncrc;
3266 u8 *bssid;
3267 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3268
3269 sdata_assert_lock(sdata);
3270
3271 /* Process beacon from the current BSS */
3272 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3273 if (baselen > len)
3274 return;
3275
3276 rcu_read_lock();
3277 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3278 if (!chanctx_conf) {
3279 rcu_read_unlock();
3280 return;
3281 }
3282
3283 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3284 rcu_read_unlock();
3285 return;
3286 }
3287 chan = chanctx_conf->def.chan;
3288 rcu_read_unlock();
3289
3290 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3291 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3292 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3293 len - baselen, false, &elems);
3294
3295 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3296 if (elems.tim && !elems.parse_error) {
3297 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3298 ifmgd->dtim_period = tim_ie->dtim_period;
3299 }
3300 ifmgd->have_beacon = true;
3301 ifmgd->assoc_data->need_beacon = false;
3302 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3303 sdata->vif.bss_conf.sync_tsf =
3304 le64_to_cpu(mgmt->u.beacon.timestamp);
3305 sdata->vif.bss_conf.sync_device_ts =
3306 rx_status->device_timestamp;
3307 if (elems.tim)
3308 sdata->vif.bss_conf.sync_dtim_count =
3309 elems.tim->dtim_count;
3310 else
3311 sdata->vif.bss_conf.sync_dtim_count = 0;
3312 }
3313 /* continue assoc process */
3314 ifmgd->assoc_data->timeout = jiffies;
3315 ifmgd->assoc_data->timeout_started = true;
3316 run_again(sdata, ifmgd->assoc_data->timeout);
3317 return;
3318 }
3319
3320 if (!ifmgd->associated ||
3321 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3322 return;
3323 bssid = ifmgd->associated->bssid;
3324
3325 /* Track average RSSI from the Beacon frames of the current AP */
3326 ifmgd->last_beacon_signal = rx_status->signal;
3327 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3328 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3329 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3330 ifmgd->last_cqm_event_signal = 0;
3331 ifmgd->count_beacon_signal = 1;
3332 ifmgd->last_ave_beacon_signal = 0;
3333 } else {
3334 ifmgd->ave_beacon_signal =
3335 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3336 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3337 ifmgd->ave_beacon_signal) / 16;
3338 ifmgd->count_beacon_signal++;
3339 }
3340
3341 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3342 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3343 int sig = ifmgd->ave_beacon_signal / 16;
3344 int last_sig = ifmgd->last_ave_beacon_signal;
3345 struct ieee80211_event event = {
3346 .type = RSSI_EVENT,
3347 };
3348
3349 /*
3350 * if signal crosses either of the boundaries, invoke callback
3351 * with appropriate parameters
3352 */
3353 if (sig > ifmgd->rssi_max_thold &&
3354 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3355 ifmgd->last_ave_beacon_signal = sig;
3356 event.u.rssi.data = RSSI_EVENT_HIGH;
3357 drv_event_callback(local, sdata, &event);
3358 } else if (sig < ifmgd->rssi_min_thold &&
3359 (last_sig >= ifmgd->rssi_max_thold ||
3360 last_sig == 0)) {
3361 ifmgd->last_ave_beacon_signal = sig;
3362 event.u.rssi.data = RSSI_EVENT_LOW;
3363 drv_event_callback(local, sdata, &event);
3364 }
3365 }
3366
3367 if (bss_conf->cqm_rssi_thold &&
3368 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3369 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3370 int sig = ifmgd->ave_beacon_signal / 16;
3371 int last_event = ifmgd->last_cqm_event_signal;
3372 int thold = bss_conf->cqm_rssi_thold;
3373 int hyst = bss_conf->cqm_rssi_hyst;
3374 if (sig < thold &&
3375 (last_event == 0 || sig < last_event - hyst)) {
3376 ifmgd->last_cqm_event_signal = sig;
3377 ieee80211_cqm_rssi_notify(
3378 &sdata->vif,
3379 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3380 GFP_KERNEL);
3381 } else if (sig > thold &&
3382 (last_event == 0 || sig > last_event + hyst)) {
3383 ifmgd->last_cqm_event_signal = sig;
3384 ieee80211_cqm_rssi_notify(
3385 &sdata->vif,
3386 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3387 GFP_KERNEL);
3388 }
3389 }
3390
3391 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3392 mlme_dbg_ratelimited(sdata,
3393 "cancelling AP probe due to a received beacon\n");
3394 ieee80211_reset_ap_probe(sdata);
3395 }
3396
3397 /*
3398 * Push the beacon loss detection into the future since
3399 * we are processing a beacon from the AP just now.
3400 */
3401 ieee80211_sta_reset_beacon_monitor(sdata);
3402
3403 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3404 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3405 len - baselen, false, &elems,
3406 care_about_ies, ncrc);
3407
3408 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3409 bool directed_tim = ieee80211_check_tim(elems.tim,
3410 elems.tim_len,
3411 ifmgd->aid);
3412 if (directed_tim) {
3413 if (local->hw.conf.dynamic_ps_timeout > 0) {
3414 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3415 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3416 ieee80211_hw_config(local,
3417 IEEE80211_CONF_CHANGE_PS);
3418 }
3419 ieee80211_send_nullfunc(local, sdata, 0);
3420 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3421 local->pspolling = true;
3422
3423 /*
3424 * Here is assumed that the driver will be
3425 * able to send ps-poll frame and receive a
3426 * response even though power save mode is
3427 * enabled, but some drivers might require
3428 * to disable power save here. This needs
3429 * to be investigated.
3430 */
3431 ieee80211_send_pspoll(local, sdata);
3432 }
3433 }
3434 }
3435
3436 if (sdata->vif.p2p) {
3437 struct ieee80211_p2p_noa_attr noa = {};
3438 int ret;
3439
3440 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3441 len - baselen,
3442 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3443 (u8 *) &noa, sizeof(noa));
3444 if (ret >= 2) {
3445 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3446 /* valid noa_attr and index changed */
3447 sdata->u.mgd.p2p_noa_index = noa.index;
3448 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3449 changed |= BSS_CHANGED_P2P_PS;
3450 /*
3451 * make sure we update all information, the CRC
3452 * mechanism doesn't look at P2P attributes.
3453 */
3454 ifmgd->beacon_crc_valid = false;
3455 }
3456 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3457 /* noa_attr not found and we had valid noa_attr before */
3458 sdata->u.mgd.p2p_noa_index = -1;
3459 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3460 changed |= BSS_CHANGED_P2P_PS;
3461 ifmgd->beacon_crc_valid = false;
3462 }
3463 }
3464
3465 if (ifmgd->csa_waiting_bcn)
3466 ieee80211_chswitch_post_beacon(sdata);
3467
3468 /*
3469 * Update beacon timing and dtim count on every beacon appearance. This
3470 * will allow the driver to use the most updated values. Do it before
3471 * comparing this one with last received beacon.
3472 * IMPORTANT: These parameters would possibly be out of sync by the time
3473 * the driver will use them. The synchronized view is currently
3474 * guaranteed only in certain callbacks.
3475 */
3476 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3477 sdata->vif.bss_conf.sync_tsf =
3478 le64_to_cpu(mgmt->u.beacon.timestamp);
3479 sdata->vif.bss_conf.sync_device_ts =
3480 rx_status->device_timestamp;
3481 if (elems.tim)
3482 sdata->vif.bss_conf.sync_dtim_count =
3483 elems.tim->dtim_count;
3484 else
3485 sdata->vif.bss_conf.sync_dtim_count = 0;
3486 }
3487
3488 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3489 return;
3490 ifmgd->beacon_crc = ncrc;
3491 ifmgd->beacon_crc_valid = true;
3492
3493 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3494
3495 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3496 rx_status->device_timestamp,
3497 &elems, true);
3498
3499 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3500 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3501 elems.wmm_param_len))
3502 changed |= BSS_CHANGED_QOS;
3503
3504 /*
3505 * If we haven't had a beacon before, tell the driver about the
3506 * DTIM period (and beacon timing if desired) now.
3507 */
3508 if (!ifmgd->have_beacon) {
3509 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3510 if (elems.tim)
3511 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3512 else
3513 bss_conf->dtim_period = 1;
3514
3515 changed |= BSS_CHANGED_BEACON_INFO;
3516 ifmgd->have_beacon = true;
3517
3518 mutex_lock(&local->iflist_mtx);
3519 ieee80211_recalc_ps(local, -1);
3520 mutex_unlock(&local->iflist_mtx);
3521
3522 ieee80211_recalc_ps_vif(sdata);
3523 }
3524
3525 if (elems.erp_info) {
3526 erp_valid = true;
3527 erp_value = elems.erp_info[0];
3528 } else {
3529 erp_valid = false;
3530 }
3531 changed |= ieee80211_handle_bss_capability(sdata,
3532 le16_to_cpu(mgmt->u.beacon.capab_info),
3533 erp_valid, erp_value);
3534
3535 mutex_lock(&local->sta_mtx);
3536 sta = sta_info_get(sdata, bssid);
3537
3538 if (ieee80211_config_bw(sdata, sta,
3539 elems.ht_cap_elem, elems.ht_operation,
3540 elems.vht_operation, bssid, &changed)) {
3541 mutex_unlock(&local->sta_mtx);
3542 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3543 WLAN_REASON_DEAUTH_LEAVING,
3544 true, deauth_buf);
3545 ieee80211_report_disconnect(sdata, deauth_buf,
3546 sizeof(deauth_buf), true,
3547 WLAN_REASON_DEAUTH_LEAVING);
3548 return;
3549 }
3550
3551 if (sta && elems.opmode_notif)
3552 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3553 rx_status->band, true);
3554 mutex_unlock(&local->sta_mtx);
3555
3556 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3557 elems.country_elem,
3558 elems.country_elem_len,
3559 elems.pwr_constr_elem,
3560 elems.cisco_dtpc_elem);
3561
3562 ieee80211_bss_info_change_notify(sdata, changed);
3563 }
3564
3565 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3566 struct sk_buff *skb)
3567 {
3568 struct ieee80211_rx_status *rx_status;
3569 struct ieee80211_mgmt *mgmt;
3570 u16 fc;
3571 struct ieee802_11_elems elems;
3572 int ies_len;
3573
3574 rx_status = (struct ieee80211_rx_status *) skb->cb;
3575 mgmt = (struct ieee80211_mgmt *) skb->data;
3576 fc = le16_to_cpu(mgmt->frame_control);
3577
3578 sdata_lock(sdata);
3579
3580 switch (fc & IEEE80211_FCTL_STYPE) {
3581 case IEEE80211_STYPE_BEACON:
3582 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3583 break;
3584 case IEEE80211_STYPE_PROBE_RESP:
3585 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3586 break;
3587 case IEEE80211_STYPE_AUTH:
3588 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3589 break;
3590 case IEEE80211_STYPE_DEAUTH:
3591 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3592 break;
3593 case IEEE80211_STYPE_DISASSOC:
3594 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3595 break;
3596 case IEEE80211_STYPE_ASSOC_RESP:
3597 case IEEE80211_STYPE_REASSOC_RESP:
3598 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3599 break;
3600 case IEEE80211_STYPE_ACTION:
3601 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3602 ies_len = skb->len -
3603 offsetof(struct ieee80211_mgmt,
3604 u.action.u.chan_switch.variable);
3605
3606 if (ies_len < 0)
3607 break;
3608
3609 ieee802_11_parse_elems(
3610 mgmt->u.action.u.chan_switch.variable,
3611 ies_len, true, &elems);
3612
3613 if (elems.parse_error)
3614 break;
3615
3616 ieee80211_sta_process_chanswitch(sdata,
3617 rx_status->mactime,
3618 rx_status->device_timestamp,
3619 &elems, false);
3620 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3621 ies_len = skb->len -
3622 offsetof(struct ieee80211_mgmt,
3623 u.action.u.ext_chan_switch.variable);
3624
3625 if (ies_len < 0)
3626 break;
3627
3628 ieee802_11_parse_elems(
3629 mgmt->u.action.u.ext_chan_switch.variable,
3630 ies_len, true, &elems);
3631
3632 if (elems.parse_error)
3633 break;
3634
3635 /* for the handling code pretend this was also an IE */
3636 elems.ext_chansw_ie =
3637 &mgmt->u.action.u.ext_chan_switch.data;
3638
3639 ieee80211_sta_process_chanswitch(sdata,
3640 rx_status->mactime,
3641 rx_status->device_timestamp,
3642 &elems, false);
3643 }
3644 break;
3645 }
3646 sdata_unlock(sdata);
3647 }
3648
3649 static void ieee80211_sta_timer(unsigned long data)
3650 {
3651 struct ieee80211_sub_if_data *sdata =
3652 (struct ieee80211_sub_if_data *) data;
3653
3654 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3655 }
3656
3657 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3658 u8 *bssid, u8 reason, bool tx)
3659 {
3660 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3661
3662 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3663 tx, frame_buf);
3664
3665 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3666 reason);
3667 }
3668
3669 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3670 {
3671 struct ieee80211_local *local = sdata->local;
3672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3673 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3674 u32 tx_flags = 0;
3675
3676 sdata_assert_lock(sdata);
3677
3678 if (WARN_ON_ONCE(!auth_data))
3679 return -EINVAL;
3680
3681 auth_data->tries++;
3682
3683 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3684 sdata_info(sdata, "authentication with %pM timed out\n",
3685 auth_data->bss->bssid);
3686
3687 /*
3688 * Most likely AP is not in the range so remove the
3689 * bss struct for that AP.
3690 */
3691 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3692
3693 return -ETIMEDOUT;
3694 }
3695
3696 drv_mgd_prepare_tx(local, sdata);
3697
3698 if (auth_data->bss->proberesp_ies) {
3699 u16 trans = 1;
3700 u16 status = 0;
3701
3702 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3703 auth_data->bss->bssid, auth_data->tries,
3704 IEEE80211_AUTH_MAX_TRIES);
3705
3706 auth_data->expected_transaction = 2;
3707
3708 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3709 trans = auth_data->sae_trans;
3710 status = auth_data->sae_status;
3711 auth_data->expected_transaction = trans;
3712 }
3713
3714 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3715 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3716 IEEE80211_TX_INTFL_MLME_CONN_TX;
3717
3718 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3719 auth_data->data, auth_data->data_len,
3720 auth_data->bss->bssid,
3721 auth_data->bss->bssid, NULL, 0, 0,
3722 tx_flags);
3723 } else {
3724 const u8 *ssidie;
3725
3726 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3727 auth_data->bss->bssid, auth_data->tries,
3728 IEEE80211_AUTH_MAX_TRIES);
3729
3730 rcu_read_lock();
3731 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3732 if (!ssidie) {
3733 rcu_read_unlock();
3734 return -EINVAL;
3735 }
3736 /*
3737 * Direct probe is sent to broadcast address as some APs
3738 * will not answer to direct packet in unassociated state.
3739 */
3740 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3741 ssidie + 2, ssidie[1],
3742 NULL, 0, (u32) -1, true, 0,
3743 auth_data->bss->channel, false);
3744 rcu_read_unlock();
3745 }
3746
3747 if (tx_flags == 0) {
3748 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3749 auth_data->timeout_started = true;
3750 run_again(sdata, auth_data->timeout);
3751 } else {
3752 auth_data->timeout =
3753 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3754 auth_data->timeout_started = true;
3755 run_again(sdata, auth_data->timeout);
3756 }
3757
3758 return 0;
3759 }
3760
3761 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3762 {
3763 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3764 struct ieee80211_local *local = sdata->local;
3765
3766 sdata_assert_lock(sdata);
3767
3768 assoc_data->tries++;
3769 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3770 sdata_info(sdata, "association with %pM timed out\n",
3771 assoc_data->bss->bssid);
3772
3773 /*
3774 * Most likely AP is not in the range so remove the
3775 * bss struct for that AP.
3776 */
3777 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3778
3779 return -ETIMEDOUT;
3780 }
3781
3782 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3783 assoc_data->bss->bssid, assoc_data->tries,
3784 IEEE80211_ASSOC_MAX_TRIES);
3785 ieee80211_send_assoc(sdata);
3786
3787 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3788 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3789 assoc_data->timeout_started = true;
3790 run_again(sdata, assoc_data->timeout);
3791 } else {
3792 assoc_data->timeout =
3793 round_jiffies_up(jiffies +
3794 IEEE80211_ASSOC_TIMEOUT_LONG);
3795 assoc_data->timeout_started = true;
3796 run_again(sdata, assoc_data->timeout);
3797 }
3798
3799 return 0;
3800 }
3801
3802 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3803 __le16 fc, bool acked)
3804 {
3805 struct ieee80211_local *local = sdata->local;
3806
3807 sdata->u.mgd.status_fc = fc;
3808 sdata->u.mgd.status_acked = acked;
3809 sdata->u.mgd.status_received = true;
3810
3811 ieee80211_queue_work(&local->hw, &sdata->work);
3812 }
3813
3814 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3815 {
3816 struct ieee80211_local *local = sdata->local;
3817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3818
3819 sdata_lock(sdata);
3820
3821 if (ifmgd->status_received) {
3822 __le16 fc = ifmgd->status_fc;
3823 bool status_acked = ifmgd->status_acked;
3824
3825 ifmgd->status_received = false;
3826 if (ifmgd->auth_data &&
3827 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3828 if (status_acked) {
3829 ifmgd->auth_data->timeout =
3830 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3831 run_again(sdata, ifmgd->auth_data->timeout);
3832 } else {
3833 ifmgd->auth_data->timeout = jiffies - 1;
3834 }
3835 ifmgd->auth_data->timeout_started = true;
3836 } else if (ifmgd->assoc_data &&
3837 (ieee80211_is_assoc_req(fc) ||
3838 ieee80211_is_reassoc_req(fc))) {
3839 if (status_acked) {
3840 ifmgd->assoc_data->timeout =
3841 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3842 run_again(sdata, ifmgd->assoc_data->timeout);
3843 } else {
3844 ifmgd->assoc_data->timeout = jiffies - 1;
3845 }
3846 ifmgd->assoc_data->timeout_started = true;
3847 }
3848 }
3849
3850 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3851 time_after(jiffies, ifmgd->auth_data->timeout)) {
3852 if (ifmgd->auth_data->done) {
3853 /*
3854 * ok ... we waited for assoc but userspace didn't,
3855 * so let's just kill the auth data
3856 */
3857 ieee80211_destroy_auth_data(sdata, false);
3858 } else if (ieee80211_probe_auth(sdata)) {
3859 u8 bssid[ETH_ALEN];
3860 struct ieee80211_event event = {
3861 .type = MLME_EVENT,
3862 .u.mlme.data = AUTH_EVENT,
3863 .u.mlme.status = MLME_TIMEOUT,
3864 };
3865
3866 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3867
3868 ieee80211_destroy_auth_data(sdata, false);
3869
3870 cfg80211_auth_timeout(sdata->dev, bssid);
3871 drv_event_callback(sdata->local, sdata, &event);
3872 }
3873 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3874 run_again(sdata, ifmgd->auth_data->timeout);
3875
3876 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3877 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3878 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3879 ieee80211_do_assoc(sdata)) {
3880 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3881 struct ieee80211_event event = {
3882 .type = MLME_EVENT,
3883 .u.mlme.data = ASSOC_EVENT,
3884 .u.mlme.status = MLME_TIMEOUT,
3885 };
3886
3887 ieee80211_destroy_assoc_data(sdata, false);
3888 cfg80211_assoc_timeout(sdata->dev, bss);
3889 drv_event_callback(sdata->local, sdata, &event);
3890 }
3891 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3892 run_again(sdata, ifmgd->assoc_data->timeout);
3893
3894 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3895 ifmgd->associated) {
3896 u8 bssid[ETH_ALEN];
3897 int max_tries;
3898
3899 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3900
3901 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3902 max_tries = max_nullfunc_tries;
3903 else
3904 max_tries = max_probe_tries;
3905
3906 /* ACK received for nullfunc probing frame */
3907 if (!ifmgd->probe_send_count)
3908 ieee80211_reset_ap_probe(sdata);
3909 else if (ifmgd->nullfunc_failed) {
3910 if (ifmgd->probe_send_count < max_tries) {
3911 mlme_dbg(sdata,
3912 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3913 bssid, ifmgd->probe_send_count,
3914 max_tries);
3915 ieee80211_mgd_probe_ap_send(sdata);
3916 } else {
3917 mlme_dbg(sdata,
3918 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3919 bssid);
3920 ieee80211_sta_connection_lost(sdata, bssid,
3921 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3922 false);
3923 }
3924 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3925 run_again(sdata, ifmgd->probe_timeout);
3926 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3927 mlme_dbg(sdata,
3928 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3929 bssid, probe_wait_ms);
3930 ieee80211_sta_connection_lost(sdata, bssid,
3931 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3932 } else if (ifmgd->probe_send_count < max_tries) {
3933 mlme_dbg(sdata,
3934 "No probe response from AP %pM after %dms, try %d/%i\n",
3935 bssid, probe_wait_ms,
3936 ifmgd->probe_send_count, max_tries);
3937 ieee80211_mgd_probe_ap_send(sdata);
3938 } else {
3939 /*
3940 * We actually lost the connection ... or did we?
3941 * Let's make sure!
3942 */
3943 wiphy_debug(local->hw.wiphy,
3944 "%s: No probe response from AP %pM"
3945 " after %dms, disconnecting.\n",
3946 sdata->name,
3947 bssid, probe_wait_ms);
3948
3949 ieee80211_sta_connection_lost(sdata, bssid,
3950 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3951 }
3952 }
3953
3954 sdata_unlock(sdata);
3955 }
3956
3957 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3958 {
3959 struct ieee80211_sub_if_data *sdata =
3960 (struct ieee80211_sub_if_data *) data;
3961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3962
3963 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3964 return;
3965
3966 sdata->u.mgd.connection_loss = false;
3967 ieee80211_queue_work(&sdata->local->hw,
3968 &sdata->u.mgd.beacon_connection_loss_work);
3969 }
3970
3971 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3972 {
3973 struct ieee80211_sub_if_data *sdata =
3974 (struct ieee80211_sub_if_data *) data;
3975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3976 struct ieee80211_local *local = sdata->local;
3977
3978 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3979 return;
3980
3981 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3982 }
3983
3984 static void ieee80211_sta_monitor_work(struct work_struct *work)
3985 {
3986 struct ieee80211_sub_if_data *sdata =
3987 container_of(work, struct ieee80211_sub_if_data,
3988 u.mgd.monitor_work);
3989
3990 ieee80211_mgd_probe_ap(sdata, false);
3991 }
3992
3993 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3994 {
3995 u32 flags;
3996
3997 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3998 __ieee80211_stop_poll(sdata);
3999
4000 /* let's probe the connection once */
4001 flags = sdata->local->hw.flags;
4002 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
4003 ieee80211_queue_work(&sdata->local->hw,
4004 &sdata->u.mgd.monitor_work);
4005 /* and do all the other regular work too */
4006 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
4007 }
4008 }
4009
4010 #ifdef CONFIG_PM
4011 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4012 {
4013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4014 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4015
4016 sdata_lock(sdata);
4017
4018 if (ifmgd->auth_data || ifmgd->assoc_data) {
4019 const u8 *bssid = ifmgd->auth_data ?
4020 ifmgd->auth_data->bss->bssid :
4021 ifmgd->assoc_data->bss->bssid;
4022
4023 /*
4024 * If we are trying to authenticate / associate while suspending,
4025 * cfg80211 won't know and won't actually abort those attempts,
4026 * thus we need to do that ourselves.
4027 */
4028 ieee80211_send_deauth_disassoc(sdata, bssid,
4029 IEEE80211_STYPE_DEAUTH,
4030 WLAN_REASON_DEAUTH_LEAVING,
4031 false, frame_buf);
4032 if (ifmgd->assoc_data)
4033 ieee80211_destroy_assoc_data(sdata, false);
4034 if (ifmgd->auth_data)
4035 ieee80211_destroy_auth_data(sdata, false);
4036 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4037 IEEE80211_DEAUTH_FRAME_LEN);
4038 }
4039
4040 /* This is a bit of a hack - we should find a better and more generic
4041 * solution to this. Normally when suspending, cfg80211 will in fact
4042 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4043 * auth (not so important) or assoc (this is the problem) process.
4044 *
4045 * As a consequence, it can happen that we are in the process of both
4046 * associating and suspending, and receive an association response
4047 * after cfg80211 has checked if it needs to disconnect, but before
4048 * we actually set the flag to drop incoming frames. This will then
4049 * cause the workqueue flush to process the association response in
4050 * the suspend, resulting in a successful association just before it
4051 * tries to remove the interface from the driver, which now though
4052 * has a channel context assigned ... this results in issues.
4053 *
4054 * To work around this (for now) simply deauth here again if we're
4055 * now connected.
4056 */
4057 if (ifmgd->associated && !sdata->local->wowlan) {
4058 u8 bssid[ETH_ALEN];
4059 struct cfg80211_deauth_request req = {
4060 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4061 .bssid = bssid,
4062 };
4063
4064 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4065 ieee80211_mgd_deauth(sdata, &req);
4066 }
4067
4068 sdata_unlock(sdata);
4069 }
4070
4071 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4072 {
4073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4074
4075 sdata_lock(sdata);
4076 if (!ifmgd->associated) {
4077 sdata_unlock(sdata);
4078 return;
4079 }
4080
4081 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4082 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4083 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4084 ieee80211_sta_connection_lost(sdata,
4085 ifmgd->associated->bssid,
4086 WLAN_REASON_UNSPECIFIED,
4087 true);
4088 sdata_unlock(sdata);
4089 return;
4090 }
4091 sdata_unlock(sdata);
4092 }
4093 #endif
4094
4095 /* interface setup */
4096 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4097 {
4098 struct ieee80211_if_managed *ifmgd;
4099
4100 ifmgd = &sdata->u.mgd;
4101 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4102 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4103 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4104 ieee80211_beacon_connection_loss_work);
4105 INIT_WORK(&ifmgd->csa_connection_drop_work,
4106 ieee80211_csa_connection_drop_work);
4107 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4108 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4109 ieee80211_tdls_peer_del_work);
4110 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4111 (unsigned long) sdata);
4112 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4113 (unsigned long) sdata);
4114 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4115 (unsigned long) sdata);
4116 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4117 (unsigned long) sdata);
4118 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4119 ieee80211_sta_handle_tspec_ac_params_wk);
4120
4121 ifmgd->flags = 0;
4122 ifmgd->powersave = sdata->wdev.ps;
4123 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4124 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4125 ifmgd->p2p_noa_index = -1;
4126
4127 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4128 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4129 else
4130 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4131
4132 /* Setup TDLS data */
4133 spin_lock_init(&ifmgd->teardown_lock);
4134 ifmgd->teardown_skb = NULL;
4135 ifmgd->orig_teardown_skb = NULL;
4136 }
4137
4138 /* scan finished notification */
4139 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4140 {
4141 struct ieee80211_sub_if_data *sdata;
4142
4143 /* Restart STA timers */
4144 rcu_read_lock();
4145 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4146 if (ieee80211_sdata_running(sdata))
4147 ieee80211_restart_sta_timer(sdata);
4148 }
4149 rcu_read_unlock();
4150 }
4151
4152 int ieee80211_max_network_latency(struct notifier_block *nb,
4153 unsigned long data, void *dummy)
4154 {
4155 s32 latency_usec = (s32) data;
4156 struct ieee80211_local *local =
4157 container_of(nb, struct ieee80211_local,
4158 network_latency_notifier);
4159
4160 mutex_lock(&local->iflist_mtx);
4161 ieee80211_recalc_ps(local, latency_usec);
4162 mutex_unlock(&local->iflist_mtx);
4163
4164 return NOTIFY_OK;
4165 }
4166
4167 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4168 struct cfg80211_bss *cbss)
4169 {
4170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4171 const u8 *ht_cap_ie, *vht_cap_ie;
4172 const struct ieee80211_ht_cap *ht_cap;
4173 const struct ieee80211_vht_cap *vht_cap;
4174 u8 chains = 1;
4175
4176 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4177 return chains;
4178
4179 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4180 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4181 ht_cap = (void *)(ht_cap_ie + 2);
4182 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4183 /*
4184 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4185 * "Tx Unequal Modulation Supported" fields.
4186 */
4187 }
4188
4189 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4190 return chains;
4191
4192 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4193 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4194 u8 nss;
4195 u16 tx_mcs_map;
4196
4197 vht_cap = (void *)(vht_cap_ie + 2);
4198 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4199 for (nss = 8; nss > 0; nss--) {
4200 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4201 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4202 break;
4203 }
4204 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4205 chains = max(chains, nss);
4206 }
4207
4208 return chains;
4209 }
4210
4211 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4212 struct cfg80211_bss *cbss)
4213 {
4214 struct ieee80211_local *local = sdata->local;
4215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4216 const struct ieee80211_ht_cap *ht_cap = NULL;
4217 const struct ieee80211_ht_operation *ht_oper = NULL;
4218 const struct ieee80211_vht_operation *vht_oper = NULL;
4219 struct ieee80211_supported_band *sband;
4220 struct cfg80211_chan_def chandef;
4221 int ret;
4222
4223 sband = local->hw.wiphy->bands[cbss->channel->band];
4224
4225 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4226 IEEE80211_STA_DISABLE_80P80MHZ |
4227 IEEE80211_STA_DISABLE_160MHZ);
4228
4229 rcu_read_lock();
4230
4231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4232 sband->ht_cap.ht_supported) {
4233 const u8 *ht_oper_ie, *ht_cap_ie;
4234
4235 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4236 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4237 ht_oper = (void *)(ht_oper_ie + 2);
4238
4239 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4240 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4241 ht_cap = (void *)(ht_cap_ie + 2);
4242
4243 if (!ht_cap) {
4244 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4245 ht_oper = NULL;
4246 }
4247 }
4248
4249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4250 sband->vht_cap.vht_supported) {
4251 const u8 *vht_oper_ie, *vht_cap;
4252
4253 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4254 WLAN_EID_VHT_OPERATION);
4255 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4256 vht_oper = (void *)(vht_oper_ie + 2);
4257 if (vht_oper && !ht_oper) {
4258 vht_oper = NULL;
4259 sdata_info(sdata,
4260 "AP advertised VHT without HT, disabling both\n");
4261 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4262 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4263 }
4264
4265 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4266 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4267 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4268 vht_oper = NULL;
4269 }
4270 }
4271
4272 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4273 cbss->channel,
4274 ht_cap, ht_oper, vht_oper,
4275 &chandef, false);
4276
4277 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4278 local->rx_chains);
4279
4280 rcu_read_unlock();
4281
4282 /* will change later if needed */
4283 sdata->smps_mode = IEEE80211_SMPS_OFF;
4284
4285 mutex_lock(&local->mtx);
4286 /*
4287 * If this fails (possibly due to channel context sharing
4288 * on incompatible channels, e.g. 80+80 and 160 sharing the
4289 * same control channel) try to use a smaller bandwidth.
4290 */
4291 ret = ieee80211_vif_use_channel(sdata, &chandef,
4292 IEEE80211_CHANCTX_SHARED);
4293
4294 /* don't downgrade for 5 and 10 MHz channels, though. */
4295 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4296 chandef.width == NL80211_CHAN_WIDTH_10)
4297 goto out;
4298
4299 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4300 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4301 ret = ieee80211_vif_use_channel(sdata, &chandef,
4302 IEEE80211_CHANCTX_SHARED);
4303 }
4304 out:
4305 mutex_unlock(&local->mtx);
4306 return ret;
4307 }
4308
4309 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4310 struct cfg80211_bss *cbss, bool assoc)
4311 {
4312 struct ieee80211_local *local = sdata->local;
4313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4314 struct ieee80211_bss *bss = (void *)cbss->priv;
4315 struct sta_info *new_sta = NULL;
4316 struct ieee80211_supported_band *sband;
4317 struct ieee80211_sta_ht_cap sta_ht_cap;
4318 bool have_sta = false, is_override = false;
4319 int err;
4320
4321 sband = local->hw.wiphy->bands[cbss->channel->band];
4322
4323 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4324 return -EINVAL;
4325
4326 if (assoc) {
4327 rcu_read_lock();
4328 have_sta = sta_info_get(sdata, cbss->bssid);
4329 rcu_read_unlock();
4330 }
4331
4332 if (!have_sta) {
4333 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4334 if (!new_sta)
4335 return -ENOMEM;
4336 }
4337
4338 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4339 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4340
4341 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4342 (sband->ht_cap.cap &
4343 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4344
4345 if (new_sta || is_override) {
4346 err = ieee80211_prep_channel(sdata, cbss);
4347 if (err) {
4348 if (new_sta)
4349 sta_info_free(local, new_sta);
4350 return -EINVAL;
4351 }
4352 }
4353
4354 if (new_sta) {
4355 u32 rates = 0, basic_rates = 0;
4356 bool have_higher_than_11mbit;
4357 int min_rate = INT_MAX, min_rate_index = -1;
4358 struct ieee80211_chanctx_conf *chanctx_conf;
4359 const struct cfg80211_bss_ies *ies;
4360 int shift = ieee80211_vif_get_shift(&sdata->vif);
4361 u32 rate_flags;
4362
4363 rcu_read_lock();
4364 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4365 if (WARN_ON(!chanctx_conf)) {
4366 rcu_read_unlock();
4367 sta_info_free(local, new_sta);
4368 return -EINVAL;
4369 }
4370 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4371 rcu_read_unlock();
4372
4373 ieee80211_get_rates(sband, bss->supp_rates,
4374 bss->supp_rates_len,
4375 &rates, &basic_rates,
4376 &have_higher_than_11mbit,
4377 &min_rate, &min_rate_index,
4378 shift, rate_flags);
4379
4380 /*
4381 * This used to be a workaround for basic rates missing
4382 * in the association response frame. Now that we no
4383 * longer use the basic rates from there, it probably
4384 * doesn't happen any more, but keep the workaround so
4385 * in case some *other* APs are buggy in different ways
4386 * we can connect -- with a warning.
4387 */
4388 if (!basic_rates && min_rate_index >= 0) {
4389 sdata_info(sdata,
4390 "No basic rates, using min rate instead\n");
4391 basic_rates = BIT(min_rate_index);
4392 }
4393
4394 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4395 sdata->vif.bss_conf.basic_rates = basic_rates;
4396
4397 /* cf. IEEE 802.11 9.2.12 */
4398 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4399 have_higher_than_11mbit)
4400 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4401 else
4402 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4403
4404 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4405
4406 /* set timing information */
4407 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4408 rcu_read_lock();
4409 ies = rcu_dereference(cbss->beacon_ies);
4410 if (ies) {
4411 const u8 *tim_ie;
4412
4413 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4414 sdata->vif.bss_conf.sync_device_ts =
4415 bss->device_ts_beacon;
4416 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4417 ies->data, ies->len);
4418 if (tim_ie && tim_ie[1] >= 2)
4419 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4420 else
4421 sdata->vif.bss_conf.sync_dtim_count = 0;
4422 } else if (!(local->hw.flags &
4423 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4424 ies = rcu_dereference(cbss->proberesp_ies);
4425 /* must be non-NULL since beacon IEs were NULL */
4426 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4427 sdata->vif.bss_conf.sync_device_ts =
4428 bss->device_ts_presp;
4429 sdata->vif.bss_conf.sync_dtim_count = 0;
4430 } else {
4431 sdata->vif.bss_conf.sync_tsf = 0;
4432 sdata->vif.bss_conf.sync_device_ts = 0;
4433 sdata->vif.bss_conf.sync_dtim_count = 0;
4434 }
4435 rcu_read_unlock();
4436
4437 /* tell driver about BSSID, basic rates and timing */
4438 ieee80211_bss_info_change_notify(sdata,
4439 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4440 BSS_CHANGED_BEACON_INT);
4441
4442 if (assoc)
4443 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4444
4445 err = sta_info_insert(new_sta);
4446 new_sta = NULL;
4447 if (err) {
4448 sdata_info(sdata,
4449 "failed to insert STA entry for the AP (error %d)\n",
4450 err);
4451 return err;
4452 }
4453 } else
4454 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4455
4456 /* Cancel scan to ensure that nothing interferes with connection */
4457 if (local->scanning)
4458 ieee80211_scan_cancel(local);
4459
4460 return 0;
4461 }
4462
4463 /* config hooks */
4464 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4465 struct cfg80211_auth_request *req)
4466 {
4467 struct ieee80211_local *local = sdata->local;
4468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4469 struct ieee80211_mgd_auth_data *auth_data;
4470 u16 auth_alg;
4471 int err;
4472
4473 /* prepare auth data structure */
4474
4475 switch (req->auth_type) {
4476 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4477 auth_alg = WLAN_AUTH_OPEN;
4478 break;
4479 case NL80211_AUTHTYPE_SHARED_KEY:
4480 if (IS_ERR(local->wep_tx_tfm))
4481 return -EOPNOTSUPP;
4482 auth_alg = WLAN_AUTH_SHARED_KEY;
4483 break;
4484 case NL80211_AUTHTYPE_FT:
4485 auth_alg = WLAN_AUTH_FT;
4486 break;
4487 case NL80211_AUTHTYPE_NETWORK_EAP:
4488 auth_alg = WLAN_AUTH_LEAP;
4489 break;
4490 case NL80211_AUTHTYPE_SAE:
4491 auth_alg = WLAN_AUTH_SAE;
4492 break;
4493 default:
4494 return -EOPNOTSUPP;
4495 }
4496
4497 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4498 req->ie_len, GFP_KERNEL);
4499 if (!auth_data)
4500 return -ENOMEM;
4501
4502 auth_data->bss = req->bss;
4503
4504 if (req->sae_data_len >= 4) {
4505 __le16 *pos = (__le16 *) req->sae_data;
4506 auth_data->sae_trans = le16_to_cpu(pos[0]);
4507 auth_data->sae_status = le16_to_cpu(pos[1]);
4508 memcpy(auth_data->data, req->sae_data + 4,
4509 req->sae_data_len - 4);
4510 auth_data->data_len += req->sae_data_len - 4;
4511 }
4512
4513 if (req->ie && req->ie_len) {
4514 memcpy(&auth_data->data[auth_data->data_len],
4515 req->ie, req->ie_len);
4516 auth_data->data_len += req->ie_len;
4517 }
4518
4519 if (req->key && req->key_len) {
4520 auth_data->key_len = req->key_len;
4521 auth_data->key_idx = req->key_idx;
4522 memcpy(auth_data->key, req->key, req->key_len);
4523 }
4524
4525 auth_data->algorithm = auth_alg;
4526
4527 /* try to authenticate/probe */
4528
4529 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4530 ifmgd->assoc_data) {
4531 err = -EBUSY;
4532 goto err_free;
4533 }
4534
4535 if (ifmgd->auth_data)
4536 ieee80211_destroy_auth_data(sdata, false);
4537
4538 /* prep auth_data so we don't go into idle on disassoc */
4539 ifmgd->auth_data = auth_data;
4540
4541 if (ifmgd->associated) {
4542 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4543
4544 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4545 WLAN_REASON_UNSPECIFIED,
4546 false, frame_buf);
4547
4548 ieee80211_report_disconnect(sdata, frame_buf,
4549 sizeof(frame_buf), true,
4550 WLAN_REASON_UNSPECIFIED);
4551 }
4552
4553 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4554
4555 err = ieee80211_prep_connection(sdata, req->bss, false);
4556 if (err)
4557 goto err_clear;
4558
4559 err = ieee80211_probe_auth(sdata);
4560 if (err) {
4561 sta_info_destroy_addr(sdata, req->bss->bssid);
4562 goto err_clear;
4563 }
4564
4565 /* hold our own reference */
4566 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4567 return 0;
4568
4569 err_clear:
4570 eth_zero_addr(ifmgd->bssid);
4571 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4572 ifmgd->auth_data = NULL;
4573 err_free:
4574 kfree(auth_data);
4575 return err;
4576 }
4577
4578 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4579 const u8 *wmm_param, int len)
4580 {
4581 const u8 *pos;
4582 size_t left;
4583
4584 if (len < 8)
4585 return false;
4586
4587 if (wmm_param[5] != 1 /* version */)
4588 return false;
4589
4590 pos = wmm_param + 8;
4591 left = len - 8;
4592
4593 for (; left >= 4; left -= 4, pos += 4) {
4594 u8 aifsn = pos[0] & 0x0f;
4595 u8 ecwmin = pos[1] & 0x0f;
4596 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4597 int aci = (pos[0] >> 5) & 0x03;
4598
4599 if (aifsn < 2) {
4600 sdata_info(sdata,
4601 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4602 aifsn, aci);
4603 return false;
4604 }
4605 if (ecwmin > ecwmax) {
4606 sdata_info(sdata,
4607 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4608 ecwmin, ecwmax, aci);
4609 return false;
4610 }
4611 }
4612
4613 return true;
4614 }
4615
4616 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4617 struct cfg80211_assoc_request *req)
4618 {
4619 struct ieee80211_local *local = sdata->local;
4620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4621 struct ieee80211_bss *bss = (void *)req->bss->priv;
4622 struct ieee80211_mgd_assoc_data *assoc_data;
4623 const struct cfg80211_bss_ies *beacon_ies;
4624 struct ieee80211_supported_band *sband;
4625 const u8 *ssidie, *ht_ie, *vht_ie;
4626 int i, err;
4627
4628 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4629 if (!assoc_data)
4630 return -ENOMEM;
4631
4632 rcu_read_lock();
4633 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4634 if (!ssidie) {
4635 rcu_read_unlock();
4636 kfree(assoc_data);
4637 return -EINVAL;
4638 }
4639 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4640 assoc_data->ssid_len = ssidie[1];
4641 rcu_read_unlock();
4642
4643 if (ifmgd->associated) {
4644 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4645
4646 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4647 WLAN_REASON_UNSPECIFIED,
4648 false, frame_buf);
4649
4650 ieee80211_report_disconnect(sdata, frame_buf,
4651 sizeof(frame_buf), true,
4652 WLAN_REASON_UNSPECIFIED);
4653 }
4654
4655 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4656 err = -EBUSY;
4657 goto err_free;
4658 }
4659
4660 if (ifmgd->assoc_data) {
4661 err = -EBUSY;
4662 goto err_free;
4663 }
4664
4665 if (ifmgd->auth_data) {
4666 bool match;
4667
4668 /* keep sta info, bssid if matching */
4669 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4670 ieee80211_destroy_auth_data(sdata, match);
4671 }
4672
4673 /* prepare assoc data */
4674
4675 ifmgd->beacon_crc_valid = false;
4676
4677 assoc_data->wmm = bss->wmm_used &&
4678 (local->hw.queues >= IEEE80211_NUM_ACS);
4679 if (assoc_data->wmm) {
4680 /* try to check validity of WMM params IE */
4681 const struct cfg80211_bss_ies *ies;
4682 const u8 *wp, *start, *end;
4683
4684 rcu_read_lock();
4685 ies = rcu_dereference(req->bss->ies);
4686 start = ies->data;
4687 end = start + ies->len;
4688
4689 while (true) {
4690 wp = cfg80211_find_vendor_ie(
4691 WLAN_OUI_MICROSOFT,
4692 WLAN_OUI_TYPE_MICROSOFT_WMM,
4693 start, end - start);
4694 if (!wp)
4695 break;
4696 start = wp + wp[1] + 2;
4697 /* if this IE is too short, try the next */
4698 if (wp[1] <= 4)
4699 continue;
4700 /* if this IE is WMM params, we found what we wanted */
4701 if (wp[6] == 1)
4702 break;
4703 }
4704
4705 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4706 wp[1] - 2)) {
4707 assoc_data->wmm = false;
4708 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4709 }
4710 rcu_read_unlock();
4711 }
4712
4713 /*
4714 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4715 * We still associate in non-HT mode (11a/b/g) if any one of these
4716 * ciphers is configured as pairwise.
4717 * We can set this to true for non-11n hardware, that'll be checked
4718 * separately along with the peer capabilities.
4719 */
4720 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4721 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4722 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4723 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4725 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4726 netdev_info(sdata->dev,
4727 "disabling HT/VHT due to WEP/TKIP use\n");
4728 }
4729 }
4730
4731 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4732 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4733 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4734 }
4735
4736 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4737 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4738
4739 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4740 sband = local->hw.wiphy->bands[req->bss->channel->band];
4741 if (!sband->ht_cap.ht_supported ||
4742 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4743 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4744 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4745 if (!bss->wmm_used &&
4746 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4747 netdev_info(sdata->dev,
4748 "disabling HT as WMM/QoS is not supported by the AP\n");
4749 }
4750
4751 /* disable VHT if we don't support it or the AP doesn't use WMM */
4752 if (!sband->vht_cap.vht_supported ||
4753 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4754 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4755 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4756 if (!bss->wmm_used &&
4757 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4758 netdev_info(sdata->dev,
4759 "disabling VHT as WMM/QoS is not supported by the AP\n");
4760 }
4761
4762 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4763 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4764 sizeof(ifmgd->ht_capa_mask));
4765
4766 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4767 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4768 sizeof(ifmgd->vht_capa_mask));
4769
4770 if (req->ie && req->ie_len) {
4771 memcpy(assoc_data->ie, req->ie, req->ie_len);
4772 assoc_data->ie_len = req->ie_len;
4773 }
4774
4775 assoc_data->bss = req->bss;
4776
4777 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4778 if (ifmgd->powersave)
4779 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4780 else
4781 sdata->smps_mode = IEEE80211_SMPS_OFF;
4782 } else
4783 sdata->smps_mode = ifmgd->req_smps;
4784
4785 assoc_data->capability = req->bss->capability;
4786 assoc_data->supp_rates = bss->supp_rates;
4787 assoc_data->supp_rates_len = bss->supp_rates_len;
4788
4789 rcu_read_lock();
4790 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4791 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4792 assoc_data->ap_ht_param =
4793 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4794 else
4795 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4796 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4797 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4798 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4799 sizeof(struct ieee80211_vht_cap));
4800 else
4801 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4802 rcu_read_unlock();
4803
4804 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4805 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4806 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4807 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4808
4809 if (bss->wmm_used && bss->uapsd_supported &&
4810 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4811 assoc_data->uapsd = true;
4812 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4813 } else {
4814 assoc_data->uapsd = false;
4815 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4816 }
4817
4818 if (req->prev_bssid)
4819 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4820
4821 if (req->use_mfp) {
4822 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4823 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4824 } else {
4825 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4826 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4827 }
4828
4829 if (req->flags & ASSOC_REQ_USE_RRM)
4830 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4831 else
4832 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4833
4834 if (req->crypto.control_port)
4835 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4836 else
4837 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4838
4839 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4840 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4841 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4842 sdata->vif.type);
4843
4844 /* kick off associate process */
4845
4846 ifmgd->assoc_data = assoc_data;
4847 ifmgd->dtim_period = 0;
4848 ifmgd->have_beacon = false;
4849
4850 err = ieee80211_prep_connection(sdata, req->bss, true);
4851 if (err)
4852 goto err_clear;
4853
4854 rcu_read_lock();
4855 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4856
4857 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4858 !beacon_ies) {
4859 /*
4860 * Wait up to one beacon interval ...
4861 * should this be more if we miss one?
4862 */
4863 sdata_info(sdata, "waiting for beacon from %pM\n",
4864 ifmgd->bssid);
4865 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4866 assoc_data->timeout_started = true;
4867 assoc_data->need_beacon = true;
4868 } else if (beacon_ies) {
4869 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4870 beacon_ies->data,
4871 beacon_ies->len);
4872 u8 dtim_count = 0;
4873
4874 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4875 const struct ieee80211_tim_ie *tim;
4876 tim = (void *)(tim_ie + 2);
4877 ifmgd->dtim_period = tim->dtim_period;
4878 dtim_count = tim->dtim_count;
4879 }
4880 ifmgd->have_beacon = true;
4881 assoc_data->timeout = jiffies;
4882 assoc_data->timeout_started = true;
4883
4884 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4885 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4886 sdata->vif.bss_conf.sync_device_ts =
4887 bss->device_ts_beacon;
4888 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4889 }
4890 } else {
4891 assoc_data->timeout = jiffies;
4892 assoc_data->timeout_started = true;
4893 }
4894 rcu_read_unlock();
4895
4896 run_again(sdata, assoc_data->timeout);
4897
4898 if (bss->corrupt_data) {
4899 char *corrupt_type = "data";
4900 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4901 if (bss->corrupt_data &
4902 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4903 corrupt_type = "beacon and probe response";
4904 else
4905 corrupt_type = "beacon";
4906 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4907 corrupt_type = "probe response";
4908 sdata_info(sdata, "associating with AP with corrupt %s\n",
4909 corrupt_type);
4910 }
4911
4912 return 0;
4913 err_clear:
4914 eth_zero_addr(ifmgd->bssid);
4915 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4916 ifmgd->assoc_data = NULL;
4917 err_free:
4918 kfree(assoc_data);
4919 return err;
4920 }
4921
4922 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4923 struct cfg80211_deauth_request *req)
4924 {
4925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4926 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4927 bool tx = !req->local_state_change;
4928
4929 if (ifmgd->auth_data &&
4930 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4931 sdata_info(sdata,
4932 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4933 req->bssid, req->reason_code,
4934 ieee80211_get_reason_code_string(req->reason_code));
4935
4936 drv_mgd_prepare_tx(sdata->local, sdata);
4937 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4938 IEEE80211_STYPE_DEAUTH,
4939 req->reason_code, tx,
4940 frame_buf);
4941 ieee80211_destroy_auth_data(sdata, false);
4942 ieee80211_report_disconnect(sdata, frame_buf,
4943 sizeof(frame_buf), true,
4944 req->reason_code);
4945
4946 return 0;
4947 }
4948
4949 if (ifmgd->assoc_data &&
4950 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4951 sdata_info(sdata,
4952 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4953 req->bssid, req->reason_code,
4954 ieee80211_get_reason_code_string(req->reason_code));
4955
4956 drv_mgd_prepare_tx(sdata->local, sdata);
4957 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4958 IEEE80211_STYPE_DEAUTH,
4959 req->reason_code, tx,
4960 frame_buf);
4961 ieee80211_destroy_assoc_data(sdata, false);
4962 ieee80211_report_disconnect(sdata, frame_buf,
4963 sizeof(frame_buf), true,
4964 req->reason_code);
4965 return 0;
4966 }
4967
4968 if (ifmgd->associated &&
4969 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4970 sdata_info(sdata,
4971 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4972 req->bssid, req->reason_code,
4973 ieee80211_get_reason_code_string(req->reason_code));
4974
4975 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4976 req->reason_code, tx, frame_buf);
4977 ieee80211_report_disconnect(sdata, frame_buf,
4978 sizeof(frame_buf), true,
4979 req->reason_code);
4980 return 0;
4981 }
4982
4983 return -ENOTCONN;
4984 }
4985
4986 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4987 struct cfg80211_disassoc_request *req)
4988 {
4989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4990 u8 bssid[ETH_ALEN];
4991 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4992
4993 /*
4994 * cfg80211 should catch this ... but it's racy since
4995 * we can receive a disassoc frame, process it, hand it
4996 * to cfg80211 while that's in a locked section already
4997 * trying to tell us that the user wants to disconnect.
4998 */
4999 if (ifmgd->associated != req->bss)
5000 return -ENOLINK;
5001
5002 sdata_info(sdata,
5003 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5004 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
5005
5006 memcpy(bssid, req->bss->bssid, ETH_ALEN);
5007 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5008 req->reason_code, !req->local_state_change,
5009 frame_buf);
5010
5011 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5012 req->reason_code);
5013
5014 return 0;
5015 }
5016
5017 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
5018 {
5019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5020
5021 /*
5022 * Make sure some work items will not run after this,
5023 * they will not do anything but might not have been
5024 * cancelled when disconnecting.
5025 */
5026 cancel_work_sync(&ifmgd->monitor_work);
5027 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5028 cancel_work_sync(&ifmgd->request_smps_work);
5029 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5030 cancel_work_sync(&ifmgd->chswitch_work);
5031 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
5032
5033 sdata_lock(sdata);
5034 if (ifmgd->assoc_data) {
5035 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
5036 ieee80211_destroy_assoc_data(sdata, false);
5037 cfg80211_assoc_timeout(sdata->dev, bss);
5038 }
5039 if (ifmgd->auth_data)
5040 ieee80211_destroy_auth_data(sdata, false);
5041 spin_lock_bh(&ifmgd->teardown_lock);
5042 if (ifmgd->teardown_skb) {
5043 kfree_skb(ifmgd->teardown_skb);
5044 ifmgd->teardown_skb = NULL;
5045 ifmgd->orig_teardown_skb = NULL;
5046 }
5047 spin_unlock_bh(&ifmgd->teardown_lock);
5048 del_timer_sync(&ifmgd->timer);
5049 sdata_unlock(sdata);
5050 }
5051
5052 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5053 enum nl80211_cqm_rssi_threshold_event rssi_event,
5054 gfp_t gfp)
5055 {
5056 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5057
5058 trace_api_cqm_rssi_notify(sdata, rssi_event);
5059
5060 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5061 }
5062 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
5063
5064 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5065 {
5066 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5067
5068 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5069
5070 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5071 }
5072 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux with added FPC-III support