projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
tipc: convert legacy nl stats show to nl compat
[deliverable/linux.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pm_qos.h>
23 #include <linux/crc32.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "led.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42 #define IEEE80211_ASSOC_MAX_TRIES 3
43
44 static int max_nullfunc_tries = 2;
45 module_param(max_nullfunc_tries, int, 0644);
46 MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49 static int max_probe_tries = 5;
50 module_param(max_probe_tries, int, 0644);
51 MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
53
54 /*
55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
61 */
62 static int beacon_loss_count = 7;
63 module_param(beacon_loss_count, int, 0644);
64 MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
66
67 /*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
72 /*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
77 static int probe_wait_ms = 500;
78 module_param(probe_wait_ms, int, 0644);
79 MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
82
83 /*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 sdata_assert_lock(sdata);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
135 ifmgd->probe_send_count = 0;
136
137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142 }
143
144 static int ecw2cw(int ecw)
145 {
146 return (1 << ecw) - 1;
147 }
148
149 static u32
150 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
153 const struct ieee80211_ht_cap *ht_cap,
154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
156 struct cfg80211_chan_def *chandef, bool tracking)
157 {
158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159 struct cfg80211_chan_def vht_chandef;
160 struct ieee80211_sta_ht_cap sta_ht_cap;
161 u32 ht_cfreq, ret;
162
163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
180 ret = IEEE80211_STA_DISABLE_40MHZ;
181 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 mutex_lock(&local->mtx);
1154 mutex_lock(&local->chanctx_mtx);
1155 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1156 lockdep_is_held(&local->chanctx_mtx));
1157 if (!conf) {
1158 sdata_info(sdata,
1159 "no channel context assigned to vif?, disconnecting\n");
1160 ieee80211_queue_work(&local->hw,
1161 &ifmgd->csa_connection_drop_work);
1162 mutex_unlock(&local->chanctx_mtx);
1163 mutex_unlock(&local->mtx);
1164 return;
1165 }
1166
1167 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1168
1169 if (local->use_chanctx &&
1170 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1171 sdata_info(sdata,
1172 "driver doesn't support chan-switch with channel contexts\n");
1173 ieee80211_queue_work(&local->hw,
1174 &ifmgd->csa_connection_drop_work);
1175 mutex_unlock(&local->chanctx_mtx);
1176 mutex_unlock(&local->mtx);
1177 return;
1178 }
1179
1180 ch_switch.timestamp = timestamp;
1181 ch_switch.device_timestamp = device_timestamp;
1182 ch_switch.block_tx = csa_ie.mode;
1183 ch_switch.chandef = csa_ie.chandef;
1184 ch_switch.count = csa_ie.count;
1185
1186 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1187 sdata_info(sdata,
1188 "preparing for channel switch failed, disconnecting\n");
1189 ieee80211_queue_work(&local->hw,
1190 &ifmgd->csa_connection_drop_work);
1191 mutex_unlock(&local->chanctx_mtx);
1192 mutex_unlock(&local->mtx);
1193 return;
1194 }
1195
1196 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1197 chanctx->mode, false);
1198 if (res) {
1199 sdata_info(sdata,
1200 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1201 res);
1202 ieee80211_queue_work(&local->hw,
1203 &ifmgd->csa_connection_drop_work);
1204 mutex_unlock(&local->chanctx_mtx);
1205 mutex_unlock(&local->mtx);
1206 return;
1207 }
1208 mutex_unlock(&local->chanctx_mtx);
1209
1210 sdata->vif.csa_active = true;
1211 sdata->csa_chandef = csa_ie.chandef;
1212 sdata->csa_block_tx = csa_ie.mode;
1213
1214 if (sdata->csa_block_tx)
1215 ieee80211_stop_vif_queues(local, sdata,
1216 IEEE80211_QUEUE_STOP_REASON_CSA);
1217 mutex_unlock(&local->mtx);
1218
1219 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1220 csa_ie.count);
1221
1222 if (local->ops->channel_switch) {
1223 /* use driver's channel switch callback */
1224 drv_channel_switch(local, sdata, &ch_switch);
1225 return;
1226 }
1227
1228 /* channel switch handled in software */
1229 if (csa_ie.count <= 1)
1230 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1231 else
1232 mod_timer(&ifmgd->chswitch_timer,
1233 TU_TO_EXP_TIME((csa_ie.count - 1) *
1234 cbss->beacon_interval));
1235 }
1236
1237 static bool
1238 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1239 struct ieee80211_channel *channel,
1240 const u8 *country_ie, u8 country_ie_len,
1241 const u8 *pwr_constr_elem,
1242 int *chan_pwr, int *pwr_reduction)
1243 {
1244 struct ieee80211_country_ie_triplet *triplet;
1245 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1246 int i, chan_increment;
1247 bool have_chan_pwr = false;
1248
1249 /* Invalid IE */
1250 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1251 return false;
1252
1253 triplet = (void *)(country_ie + 3);
1254 country_ie_len -= 3;
1255
1256 switch (channel->band) {
1257 default:
1258 WARN_ON_ONCE(1);
1259 /* fall through */
1260 case IEEE80211_BAND_2GHZ:
1261 case IEEE80211_BAND_60GHZ:
1262 chan_increment = 1;
1263 break;
1264 case IEEE80211_BAND_5GHZ:
1265 chan_increment = 4;
1266 break;
1267 }
1268
1269 /* find channel */
1270 while (country_ie_len >= 3) {
1271 u8 first_channel = triplet->chans.first_channel;
1272
1273 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1274 goto next;
1275
1276 for (i = 0; i < triplet->chans.num_channels; i++) {
1277 if (first_channel + i * chan_increment == chan) {
1278 have_chan_pwr = true;
1279 *chan_pwr = triplet->chans.max_power;
1280 break;
1281 }
1282 }
1283 if (have_chan_pwr)
1284 break;
1285
1286 next:
1287 triplet++;
1288 country_ie_len -= 3;
1289 }
1290
1291 if (have_chan_pwr && pwr_constr_elem)
1292 *pwr_reduction = *pwr_constr_elem;
1293 else
1294 *pwr_reduction = 0;
1295
1296 return have_chan_pwr;
1297 }
1298
1299 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 const u8 *cisco_dtpc_ie,
1302 int *pwr_level)
1303 {
1304 /* From practical testing, the first data byte of the DTPC element
1305 * seems to contain the requested dBm level, and the CLI on Cisco
1306 * APs clearly state the range is -127 to 127 dBm, which indicates
1307 * a signed byte, although it seemingly never actually goes negative.
1308 * The other byte seems to always be zero.
1309 */
1310 *pwr_level = (__s8)cisco_dtpc_ie[4];
1311 }
1312
1313 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1314 struct ieee80211_channel *channel,
1315 struct ieee80211_mgmt *mgmt,
1316 const u8 *country_ie, u8 country_ie_len,
1317 const u8 *pwr_constr_ie,
1318 const u8 *cisco_dtpc_ie)
1319 {
1320 bool has_80211h_pwr = false, has_cisco_pwr = false;
1321 int chan_pwr = 0, pwr_reduction_80211h = 0;
1322 int pwr_level_cisco, pwr_level_80211h;
1323 int new_ap_level;
1324 __le16 capab = mgmt->u.probe_resp.capab_info;
1325
1326 if (country_ie &&
1327 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1328 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
1329 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1330 sdata, channel, country_ie, country_ie_len,
1331 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
1332 pwr_level_80211h =
1333 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1334 }
1335
1336 if (cisco_dtpc_ie) {
1337 ieee80211_find_cisco_dtpc(
1338 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1339 has_cisco_pwr = true;
1340 }
1341
1342 if (!has_80211h_pwr && !has_cisco_pwr)
1343 return 0;
1344
1345 /* If we have both 802.11h and Cisco DTPC, apply both limits
1346 * by picking the smallest of the two power levels advertised.
1347 */
1348 if (has_80211h_pwr &&
1349 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1350 sdata_info(sdata,
1351 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1352 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1353 sdata->u.mgd.bssid);
1354 new_ap_level = pwr_level_80211h;
1355 } else { /* has_cisco_pwr is always true here. */
1356 sdata_info(sdata,
1357 "Limiting TX power to %d dBm as advertised by %pM\n",
1358 pwr_level_cisco, sdata->u.mgd.bssid);
1359 new_ap_level = pwr_level_cisco;
1360 }
1361
1362 if (sdata->ap_power_level == new_ap_level)
1363 return 0;
1364
1365 sdata->ap_power_level = new_ap_level;
1366 if (__ieee80211_recalc_txpower(sdata))
1367 return BSS_CHANGED_TXPOWER;
1368 return 0;
1369 }
1370
1371 /* powersave */
1372 static void ieee80211_enable_ps(struct ieee80211_local *local,
1373 struct ieee80211_sub_if_data *sdata)
1374 {
1375 struct ieee80211_conf *conf = &local->hw.conf;
1376
1377 /*
1378 * If we are scanning right now then the parameters will
1379 * take effect when scan finishes.
1380 */
1381 if (local->scanning)
1382 return;
1383
1384 if (conf->dynamic_ps_timeout > 0 &&
1385 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1386 mod_timer(&local->dynamic_ps_timer, jiffies +
1387 msecs_to_jiffies(conf->dynamic_ps_timeout));
1388 } else {
1389 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1390 ieee80211_send_nullfunc(local, sdata, 1);
1391
1392 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1393 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1394 return;
1395
1396 conf->flags |= IEEE80211_CONF_PS;
1397 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1398 }
1399 }
1400
1401 static void ieee80211_change_ps(struct ieee80211_local *local)
1402 {
1403 struct ieee80211_conf *conf = &local->hw.conf;
1404
1405 if (local->ps_sdata) {
1406 ieee80211_enable_ps(local, local->ps_sdata);
1407 } else if (conf->flags & IEEE80211_CONF_PS) {
1408 conf->flags &= ~IEEE80211_CONF_PS;
1409 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1410 del_timer_sync(&local->dynamic_ps_timer);
1411 cancel_work_sync(&local->dynamic_ps_enable_work);
1412 }
1413 }
1414
1415 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1416 {
1417 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1418 struct sta_info *sta = NULL;
1419 bool authorized = false;
1420
1421 if (!mgd->powersave)
1422 return false;
1423
1424 if (mgd->broken_ap)
1425 return false;
1426
1427 if (!mgd->associated)
1428 return false;
1429
1430 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1431 return false;
1432
1433 if (!mgd->have_beacon)
1434 return false;
1435
1436 rcu_read_lock();
1437 sta = sta_info_get(sdata, mgd->bssid);
1438 if (sta)
1439 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1440 rcu_read_unlock();
1441
1442 return authorized;
1443 }
1444
1445 /* need to hold RTNL or interface lock */
1446 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1447 {
1448 struct ieee80211_sub_if_data *sdata, *found = NULL;
1449 int count = 0;
1450 int timeout;
1451
1452 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1453 local->ps_sdata = NULL;
1454 return;
1455 }
1456
1457 list_for_each_entry(sdata, &local->interfaces, list) {
1458 if (!ieee80211_sdata_running(sdata))
1459 continue;
1460 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1461 /* If an AP vif is found, then disable PS
1462 * by setting the count to zero thereby setting
1463 * ps_sdata to NULL.
1464 */
1465 count = 0;
1466 break;
1467 }
1468 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1469 continue;
1470 found = sdata;
1471 count++;
1472 }
1473
1474 if (count == 1 && ieee80211_powersave_allowed(found)) {
1475 s32 beaconint_us;
1476
1477 if (latency < 0)
1478 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1479
1480 beaconint_us = ieee80211_tu_to_usec(
1481 found->vif.bss_conf.beacon_int);
1482
1483 timeout = local->dynamic_ps_forced_timeout;
1484 if (timeout < 0) {
1485 /*
1486 * Go to full PSM if the user configures a very low
1487 * latency requirement.
1488 * The 2000 second value is there for compatibility
1489 * until the PM_QOS_NETWORK_LATENCY is configured
1490 * with real values.
1491 */
1492 if (latency > (1900 * USEC_PER_MSEC) &&
1493 latency != (2000 * USEC_PER_SEC))
1494 timeout = 0;
1495 else
1496 timeout = 100;
1497 }
1498 local->hw.conf.dynamic_ps_timeout = timeout;
1499
1500 if (beaconint_us > latency) {
1501 local->ps_sdata = NULL;
1502 } else {
1503 int maxslp = 1;
1504 u8 dtimper = found->u.mgd.dtim_period;
1505
1506 /* If the TIM IE is invalid, pretend the value is 1 */
1507 if (!dtimper)
1508 dtimper = 1;
1509 else if (dtimper > 1)
1510 maxslp = min_t(int, dtimper,
1511 latency / beaconint_us);
1512
1513 local->hw.conf.max_sleep_period = maxslp;
1514 local->hw.conf.ps_dtim_period = dtimper;
1515 local->ps_sdata = found;
1516 }
1517 } else {
1518 local->ps_sdata = NULL;
1519 }
1520
1521 ieee80211_change_ps(local);
1522 }
1523
1524 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1525 {
1526 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1527
1528 if (sdata->vif.bss_conf.ps != ps_allowed) {
1529 sdata->vif.bss_conf.ps = ps_allowed;
1530 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1531 }
1532 }
1533
1534 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1535 {
1536 struct ieee80211_local *local =
1537 container_of(work, struct ieee80211_local,
1538 dynamic_ps_disable_work);
1539
1540 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1541 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1542 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1543 }
1544
1545 ieee80211_wake_queues_by_reason(&local->hw,
1546 IEEE80211_MAX_QUEUE_MAP,
1547 IEEE80211_QUEUE_STOP_REASON_PS,
1548 false);
1549 }
1550
1551 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1552 {
1553 struct ieee80211_local *local =
1554 container_of(work, struct ieee80211_local,
1555 dynamic_ps_enable_work);
1556 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1557 struct ieee80211_if_managed *ifmgd;
1558 unsigned long flags;
1559 int q;
1560
1561 /* can only happen when PS was just disabled anyway */
1562 if (!sdata)
1563 return;
1564
1565 ifmgd = &sdata->u.mgd;
1566
1567 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1568 return;
1569
1570 if (local->hw.conf.dynamic_ps_timeout > 0) {
1571 /* don't enter PS if TX frames are pending */
1572 if (drv_tx_frames_pending(local)) {
1573 mod_timer(&local->dynamic_ps_timer, jiffies +
1574 msecs_to_jiffies(
1575 local->hw.conf.dynamic_ps_timeout));
1576 return;
1577 }
1578
1579 /*
1580 * transmission can be stopped by others which leads to
1581 * dynamic_ps_timer expiry. Postpone the ps timer if it
1582 * is not the actual idle state.
1583 */
1584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1585 for (q = 0; q < local->hw.queues; q++) {
1586 if (local->queue_stop_reasons[q]) {
1587 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1588 flags);
1589 mod_timer(&local->dynamic_ps_timer, jiffies +
1590 msecs_to_jiffies(
1591 local->hw.conf.dynamic_ps_timeout));
1592 return;
1593 }
1594 }
1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1596 }
1597
1598 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1599 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1600 if (drv_tx_frames_pending(local)) {
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
1604 } else {
1605 ieee80211_send_nullfunc(local, sdata, 1);
1606 /* Flush to get the tx status of nullfunc frame */
1607 ieee80211_flush_queues(local, sdata, false);
1608 }
1609 }
1610
1611 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1612 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1613 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1614 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1615 local->hw.conf.flags |= IEEE80211_CONF_PS;
1616 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1617 }
1618 }
1619
1620 void ieee80211_dynamic_ps_timer(unsigned long data)
1621 {
1622 struct ieee80211_local *local = (void *) data;
1623
1624 if (local->quiescing || local->suspended)
1625 return;
1626
1627 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1628 }
1629
1630 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1631 {
1632 struct delayed_work *delayed_work =
1633 container_of(work, struct delayed_work, work);
1634 struct ieee80211_sub_if_data *sdata =
1635 container_of(delayed_work, struct ieee80211_sub_if_data,
1636 dfs_cac_timer_work);
1637 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1638
1639 mutex_lock(&sdata->local->mtx);
1640 if (sdata->wdev.cac_started) {
1641 ieee80211_vif_release_channel(sdata);
1642 cfg80211_cac_event(sdata->dev, &chandef,
1643 NL80211_RADAR_CAC_FINISHED,
1644 GFP_KERNEL);
1645 }
1646 mutex_unlock(&sdata->local->mtx);
1647 }
1648
1649 static bool
1650 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1651 {
1652 struct ieee80211_local *local = sdata->local;
1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1654 bool ret = false;
1655 int ac;
1656
1657 if (local->hw.queues < IEEE80211_NUM_ACS)
1658 return false;
1659
1660 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1661 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1662 int non_acm_ac;
1663 unsigned long now = jiffies;
1664
1665 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1666 tx_tspec->admitted_time &&
1667 time_after(now, tx_tspec->time_slice_start + HZ)) {
1668 tx_tspec->consumed_tx_time = 0;
1669 tx_tspec->time_slice_start = now;
1670
1671 if (tx_tspec->downgraded)
1672 tx_tspec->action =
1673 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1674 }
1675
1676 switch (tx_tspec->action) {
1677 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1678 /* take the original parameters */
1679 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1680 sdata_err(sdata,
1681 "failed to set TX queue parameters for queue %d\n",
1682 ac);
1683 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1684 tx_tspec->downgraded = false;
1685 ret = true;
1686 break;
1687 case TX_TSPEC_ACTION_DOWNGRADE:
1688 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1689 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1690 ret = true;
1691 break;
1692 }
1693 /* downgrade next lower non-ACM AC */
1694 for (non_acm_ac = ac + 1;
1695 non_acm_ac < IEEE80211_NUM_ACS;
1696 non_acm_ac++)
1697 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1698 break;
1699 /* The loop will result in using BK even if it requires
1700 * admission control, such configuration makes no sense
1701 * and we have to transmit somehow - the AC selection
1702 * does the same thing.
1703 */
1704 if (drv_conf_tx(local, sdata, ac,
1705 &sdata->tx_conf[non_acm_ac]))
1706 sdata_err(sdata,
1707 "failed to set TX queue parameters for queue %d\n",
1708 ac);
1709 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1710 ret = true;
1711 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1712 tx_tspec->time_slice_start + HZ - now + 1);
1713 break;
1714 case TX_TSPEC_ACTION_NONE:
1715 /* nothing now */
1716 break;
1717 }
1718 }
1719
1720 return ret;
1721 }
1722
1723 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1724 {
1725 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1726 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1727 }
1728
1729 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1730 {
1731 struct ieee80211_sub_if_data *sdata;
1732
1733 sdata = container_of(work, struct ieee80211_sub_if_data,
1734 u.mgd.tx_tspec_wk.work);
1735 ieee80211_sta_handle_tspec_ac_params(sdata);
1736 }
1737
1738 /* MLME */
1739 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1740 struct ieee80211_sub_if_data *sdata,
1741 const u8 *wmm_param, size_t wmm_param_len)
1742 {
1743 struct ieee80211_tx_queue_params params;
1744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1745 size_t left;
1746 int count;
1747 const u8 *pos;
1748 u8 uapsd_queues = 0;
1749
1750 if (!local->ops->conf_tx)
1751 return false;
1752
1753 if (local->hw.queues < IEEE80211_NUM_ACS)
1754 return false;
1755
1756 if (!wmm_param)
1757 return false;
1758
1759 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1760 return false;
1761
1762 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1763 uapsd_queues = ifmgd->uapsd_queues;
1764
1765 count = wmm_param[6] & 0x0f;
1766 if (count == ifmgd->wmm_last_param_set)
1767 return false;
1768 ifmgd->wmm_last_param_set = count;
1769
1770 pos = wmm_param + 8;
1771 left = wmm_param_len - 8;
1772
1773 memset(&params, 0, sizeof(params));
1774
1775 sdata->wmm_acm = 0;
1776 for (; left >= 4; left -= 4, pos += 4) {
1777 int aci = (pos[0] >> 5) & 0x03;
1778 int acm = (pos[0] >> 4) & 0x01;
1779 bool uapsd = false;
1780 int queue;
1781
1782 switch (aci) {
1783 case 1: /* AC_BK */
1784 queue = 3;
1785 if (acm)
1786 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1788 uapsd = true;
1789 break;
1790 case 2: /* AC_VI */
1791 queue = 1;
1792 if (acm)
1793 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1794 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1795 uapsd = true;
1796 break;
1797 case 3: /* AC_VO */
1798 queue = 0;
1799 if (acm)
1800 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1801 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1802 uapsd = true;
1803 break;
1804 case 0: /* AC_BE */
1805 default:
1806 queue = 2;
1807 if (acm)
1808 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1810 uapsd = true;
1811 break;
1812 }
1813
1814 params.aifs = pos[0] & 0x0f;
1815 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1816 params.cw_min = ecw2cw(pos[1] & 0x0f);
1817 params.txop = get_unaligned_le16(pos + 2);
1818 params.acm = acm;
1819 params.uapsd = uapsd;
1820
1821 mlme_dbg(sdata,
1822 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1823 queue, aci, acm,
1824 params.aifs, params.cw_min, params.cw_max,
1825 params.txop, params.uapsd,
1826 ifmgd->tx_tspec[queue].downgraded);
1827 sdata->tx_conf[queue] = params;
1828 if (!ifmgd->tx_tspec[queue].downgraded &&
1829 drv_conf_tx(local, sdata, queue, &params))
1830 sdata_err(sdata,
1831 "failed to set TX queue parameters for queue %d\n",
1832 queue);
1833 }
1834
1835 /* enable WMM or activate new settings */
1836 sdata->vif.bss_conf.qos = true;
1837 return true;
1838 }
1839
1840 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1841 {
1842 lockdep_assert_held(&sdata->local->mtx);
1843
1844 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1845 ieee80211_run_deferred_scan(sdata->local);
1846 }
1847
1848 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1849 {
1850 mutex_lock(&sdata->local->mtx);
1851 __ieee80211_stop_poll(sdata);
1852 mutex_unlock(&sdata->local->mtx);
1853 }
1854
1855 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1856 u16 capab, bool erp_valid, u8 erp)
1857 {
1858 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1859 u32 changed = 0;
1860 bool use_protection;
1861 bool use_short_preamble;
1862 bool use_short_slot;
1863
1864 if (erp_valid) {
1865 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1866 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1867 } else {
1868 use_protection = false;
1869 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1870 }
1871
1872 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1873 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1874 use_short_slot = true;
1875
1876 if (use_protection != bss_conf->use_cts_prot) {
1877 bss_conf->use_cts_prot = use_protection;
1878 changed |= BSS_CHANGED_ERP_CTS_PROT;
1879 }
1880
1881 if (use_short_preamble != bss_conf->use_short_preamble) {
1882 bss_conf->use_short_preamble = use_short_preamble;
1883 changed |= BSS_CHANGED_ERP_PREAMBLE;
1884 }
1885
1886 if (use_short_slot != bss_conf->use_short_slot) {
1887 bss_conf->use_short_slot = use_short_slot;
1888 changed |= BSS_CHANGED_ERP_SLOT;
1889 }
1890
1891 return changed;
1892 }
1893
1894 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1895 struct cfg80211_bss *cbss,
1896 u32 bss_info_changed)
1897 {
1898 struct ieee80211_bss *bss = (void *)cbss->priv;
1899 struct ieee80211_local *local = sdata->local;
1900 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1901
1902 bss_info_changed |= BSS_CHANGED_ASSOC;
1903 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1904 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1905
1906 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1907 beacon_loss_count * bss_conf->beacon_int));
1908
1909 sdata->u.mgd.associated = cbss;
1910 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1911
1912 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1913
1914 if (sdata->vif.p2p) {
1915 const struct cfg80211_bss_ies *ies;
1916
1917 rcu_read_lock();
1918 ies = rcu_dereference(cbss->ies);
1919 if (ies) {
1920 int ret;
1921
1922 ret = cfg80211_get_p2p_attr(
1923 ies->data, ies->len,
1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1925 (u8 *) &bss_conf->p2p_noa_attr,
1926 sizeof(bss_conf->p2p_noa_attr));
1927 if (ret >= 2) {
1928 sdata->u.mgd.p2p_noa_index =
1929 bss_conf->p2p_noa_attr.index;
1930 bss_info_changed |= BSS_CHANGED_P2P_PS;
1931 }
1932 }
1933 rcu_read_unlock();
1934 }
1935
1936 /* just to be sure */
1937 ieee80211_stop_poll(sdata);
1938
1939 ieee80211_led_assoc(local, 1);
1940
1941 if (sdata->u.mgd.have_beacon) {
1942 /*
1943 * If the AP is buggy we may get here with no DTIM period
1944 * known, so assume it's 1 which is the only safe assumption
1945 * in that case, although if the TIM IE is broken powersave
1946 * probably just won't work at all.
1947 */
1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1949 bss_conf->beacon_rate = bss->beacon_rate;
1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1951 } else {
1952 bss_conf->beacon_rate = NULL;
1953 bss_conf->dtim_period = 0;
1954 }
1955
1956 bss_conf->assoc = 1;
1957
1958 /* Tell the driver to monitor connection quality (if supported) */
1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1960 bss_conf->cqm_rssi_thold)
1961 bss_info_changed |= BSS_CHANGED_CQM;
1962
1963 /* Enable ARP filtering */
1964 if (bss_conf->arp_addr_cnt)
1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1966
1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1968
1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local, -1);
1971 mutex_unlock(&local->iflist_mtx);
1972
1973 ieee80211_recalc_smps(sdata);
1974 ieee80211_recalc_ps_vif(sdata);
1975
1976 netif_carrier_on(sdata->dev);
1977 }
1978
1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1980 u16 stype, u16 reason, bool tx,
1981 u8 *frame_buf)
1982 {
1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1984 struct ieee80211_local *local = sdata->local;
1985 u32 changed = 0;
1986
1987 sdata_assert_lock(sdata);
1988
1989 if (WARN_ON_ONCE(tx && !frame_buf))
1990 return;
1991
1992 if (WARN_ON(!ifmgd->associated))
1993 return;
1994
1995 ieee80211_stop_poll(sdata);
1996
1997 ifmgd->associated = NULL;
1998 netif_carrier_off(sdata->dev);
1999
2000 /*
2001 * if we want to get out of ps before disassoc (why?) we have
2002 * to do it before sending disassoc, as otherwise the null-packet
2003 * won't be valid.
2004 */
2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2008 }
2009 local->ps_sdata = NULL;
2010
2011 /* disable per-vif ps */
2012 ieee80211_recalc_ps_vif(sdata);
2013
2014 /* make sure ongoing transmission finishes */
2015 synchronize_net();
2016
2017 /*
2018 * drop any frame before deauth/disassoc, this can be data or
2019 * management frame. Since we are disconnecting, we should not
2020 * insist sending these frames which can take time and delay
2021 * the disconnection and possible the roaming.
2022 */
2023 if (tx)
2024 ieee80211_flush_queues(local, sdata, true);
2025
2026 /* deauthenticate/disassociate now */
2027 if (tx || frame_buf)
2028 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2029 reason, tx, frame_buf);
2030
2031 /* flush out frame - make sure the deauth was actually sent */
2032 if (tx)
2033 ieee80211_flush_queues(local, sdata, false);
2034
2035 /* clear bssid only after building the needed mgmt frames */
2036 memset(ifmgd->bssid, 0, ETH_ALEN);
2037
2038 /* remove AP and TDLS peers */
2039 sta_info_flush(sdata);
2040
2041 /* finally reset all BSS / config parameters */
2042 changed |= ieee80211_reset_erp_info(sdata);
2043
2044 ieee80211_led_assoc(local, 0);
2045 changed |= BSS_CHANGED_ASSOC;
2046 sdata->vif.bss_conf.assoc = false;
2047
2048 ifmgd->p2p_noa_index = -1;
2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2051
2052 /* on the next assoc, re-program HT/VHT parameters */
2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2057
2058 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2059
2060 del_timer_sync(&local->dynamic_ps_timer);
2061 cancel_work_sync(&local->dynamic_ps_enable_work);
2062
2063 /* Disable ARP filtering */
2064 if (sdata->vif.bss_conf.arp_addr_cnt)
2065 changed |= BSS_CHANGED_ARP_FILTER;
2066
2067 sdata->vif.bss_conf.qos = false;
2068 changed |= BSS_CHANGED_QOS;
2069
2070 /* The BSSID (not really interesting) and HT changed */
2071 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2072 ieee80211_bss_info_change_notify(sdata, changed);
2073
2074 /* disassociated - set to defaults now */
2075 ieee80211_set_wmm_default(sdata, false);
2076
2077 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2078 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2079 del_timer_sync(&sdata->u.mgd.timer);
2080 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2081
2082 sdata->vif.bss_conf.dtim_period = 0;
2083 sdata->vif.bss_conf.beacon_rate = NULL;
2084
2085 ifmgd->have_beacon = false;
2086
2087 ifmgd->flags = 0;
2088 mutex_lock(&local->mtx);
2089 ieee80211_vif_release_channel(sdata);
2090
2091 sdata->vif.csa_active = false;
2092 ifmgd->csa_waiting_bcn = false;
2093 if (sdata->csa_block_tx) {
2094 ieee80211_wake_vif_queues(local, sdata,
2095 IEEE80211_QUEUE_STOP_REASON_CSA);
2096 sdata->csa_block_tx = false;
2097 }
2098 mutex_unlock(&local->mtx);
2099
2100 /* existing TX TSPEC sessions no longer exist */
2101 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2102 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2103
2104 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2105 }
2106
2107 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2108 struct ieee80211_hdr *hdr)
2109 {
2110 /*
2111 * We can postpone the mgd.timer whenever receiving unicast frames
2112 * from AP because we know that the connection is working both ways
2113 * at that time. But multicast frames (and hence also beacons) must
2114 * be ignored here, because we need to trigger the timer during
2115 * data idle periods for sending the periodic probe request to the
2116 * AP we're connected to.
2117 */
2118 if (is_multicast_ether_addr(hdr->addr1))
2119 return;
2120
2121 ieee80211_sta_reset_conn_monitor(sdata);
2122 }
2123
2124 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2125 {
2126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2127 struct ieee80211_local *local = sdata->local;
2128
2129 mutex_lock(&local->mtx);
2130 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2131 goto out;
2132
2133 __ieee80211_stop_poll(sdata);
2134
2135 mutex_lock(&local->iflist_mtx);
2136 ieee80211_recalc_ps(local, -1);
2137 mutex_unlock(&local->iflist_mtx);
2138
2139 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
2140 goto out;
2141
2142 /*
2143 * We've received a probe response, but are not sure whether
2144 * we have or will be receiving any beacons or data, so let's
2145 * schedule the timers again, just in case.
2146 */
2147 ieee80211_sta_reset_beacon_monitor(sdata);
2148
2149 mod_timer(&ifmgd->conn_mon_timer,
2150 round_jiffies_up(jiffies +
2151 IEEE80211_CONNECTION_IDLE_TIME));
2152 out:
2153 mutex_unlock(&local->mtx);
2154 }
2155
2156 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2157 struct ieee80211_hdr *hdr,
2158 u16 tx_time)
2159 {
2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2161 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2162 int ac = ieee80211_ac_from_tid(tid);
2163 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2164 unsigned long now = jiffies;
2165
2166 if (likely(!tx_tspec->admitted_time))
2167 return;
2168
2169 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2170 tx_tspec->consumed_tx_time = 0;
2171 tx_tspec->time_slice_start = now;
2172
2173 if (tx_tspec->downgraded) {
2174 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2175 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2176 }
2177 }
2178
2179 if (tx_tspec->downgraded)
2180 return;
2181
2182 tx_tspec->consumed_tx_time += tx_time;
2183
2184 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2185 tx_tspec->downgraded = true;
2186 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2187 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2188 }
2189 }
2190
2191 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2192 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
2193 {
2194 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2195
2196 if (!ieee80211_is_data(hdr->frame_control))
2197 return;
2198
2199 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2200 sdata->u.mgd.probe_send_count > 0) {
2201 if (ack)
2202 ieee80211_sta_reset_conn_monitor(sdata);
2203 else
2204 sdata->u.mgd.nullfunc_failed = true;
2205 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2206 return;
2207 }
2208
2209 if (ack)
2210 ieee80211_sta_reset_conn_monitor(sdata);
2211 }
2212
2213 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2214 {
2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2216 const u8 *ssid;
2217 u8 *dst = ifmgd->associated->bssid;
2218 u8 unicast_limit = max(1, max_probe_tries - 3);
2219
2220 /*
2221 * Try sending broadcast probe requests for the last three
2222 * probe requests after the first ones failed since some
2223 * buggy APs only support broadcast probe requests.
2224 */
2225 if (ifmgd->probe_send_count >= unicast_limit)
2226 dst = NULL;
2227
2228 /*
2229 * When the hardware reports an accurate Tx ACK status, it's
2230 * better to send a nullfunc frame instead of a probe request,
2231 * as it will kick us off the AP quickly if we aren't associated
2232 * anymore. The timeout will be reset if the frame is ACKed by
2233 * the AP.
2234 */
2235 ifmgd->probe_send_count++;
2236
2237 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2238 ifmgd->nullfunc_failed = false;
2239 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2240 } else {
2241 int ssid_len;
2242
2243 rcu_read_lock();
2244 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2245 if (WARN_ON_ONCE(ssid == NULL))
2246 ssid_len = 0;
2247 else
2248 ssid_len = ssid[1];
2249
2250 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2251 ssid + 2, ssid_len, NULL,
2252 0, (u32) -1, true, 0,
2253 ifmgd->associated->channel, false);
2254 rcu_read_unlock();
2255 }
2256
2257 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2258 run_again(sdata, ifmgd->probe_timeout);
2259 }
2260
2261 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2262 bool beacon)
2263 {
2264 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2265 bool already = false;
2266
2267 if (!ieee80211_sdata_running(sdata))
2268 return;
2269
2270 sdata_lock(sdata);
2271
2272 if (!ifmgd->associated)
2273 goto out;
2274
2275 mutex_lock(&sdata->local->mtx);
2276
2277 if (sdata->local->tmp_channel || sdata->local->scanning) {
2278 mutex_unlock(&sdata->local->mtx);
2279 goto out;
2280 }
2281
2282 if (beacon) {
2283 mlme_dbg_ratelimited(sdata,
2284 "detected beacon loss from AP (missed %d beacons) - probing\n",
2285 beacon_loss_count);
2286
2287 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
2288 }
2289
2290 /*
2291 * The driver/our work has already reported this event or the
2292 * connection monitoring has kicked in and we have already sent
2293 * a probe request. Or maybe the AP died and the driver keeps
2294 * reporting until we disassociate...
2295 *
2296 * In either case we have to ignore the current call to this
2297 * function (except for setting the correct probe reason bit)
2298 * because otherwise we would reset the timer every time and
2299 * never check whether we received a probe response!
2300 */
2301 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2302 already = true;
2303
2304 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2305
2306 mutex_unlock(&sdata->local->mtx);
2307
2308 if (already)
2309 goto out;
2310
2311 mutex_lock(&sdata->local->iflist_mtx);
2312 ieee80211_recalc_ps(sdata->local, -1);
2313 mutex_unlock(&sdata->local->iflist_mtx);
2314
2315 ifmgd->probe_send_count = 0;
2316 ieee80211_mgd_probe_ap_send(sdata);
2317 out:
2318 sdata_unlock(sdata);
2319 }
2320
2321 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2322 struct ieee80211_vif *vif)
2323 {
2324 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2326 struct cfg80211_bss *cbss;
2327 struct sk_buff *skb;
2328 const u8 *ssid;
2329 int ssid_len;
2330
2331 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2332 return NULL;
2333
2334 sdata_assert_lock(sdata);
2335
2336 if (ifmgd->associated)
2337 cbss = ifmgd->associated;
2338 else if (ifmgd->auth_data)
2339 cbss = ifmgd->auth_data->bss;
2340 else if (ifmgd->assoc_data)
2341 cbss = ifmgd->assoc_data->bss;
2342 else
2343 return NULL;
2344
2345 rcu_read_lock();
2346 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2347 if (WARN_ON_ONCE(ssid == NULL))
2348 ssid_len = 0;
2349 else
2350 ssid_len = ssid[1];
2351
2352 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
2353 (u32) -1, cbss->channel,
2354 ssid + 2, ssid_len,
2355 NULL, 0, true);
2356 rcu_read_unlock();
2357
2358 return skb;
2359 }
2360 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2361
2362 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2363 {
2364 struct ieee80211_local *local = sdata->local;
2365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2366 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2367
2368 sdata_lock(sdata);
2369 if (!ifmgd->associated) {
2370 sdata_unlock(sdata);
2371 return;
2372 }
2373
2374 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2375 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2376 true, frame_buf);
2377 mutex_lock(&local->mtx);
2378 sdata->vif.csa_active = false;
2379 ifmgd->csa_waiting_bcn = false;
2380 if (sdata->csa_block_tx) {
2381 ieee80211_wake_vif_queues(local, sdata,
2382 IEEE80211_QUEUE_STOP_REASON_CSA);
2383 sdata->csa_block_tx = false;
2384 }
2385 mutex_unlock(&local->mtx);
2386
2387 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2388 IEEE80211_DEAUTH_FRAME_LEN);
2389 sdata_unlock(sdata);
2390 }
2391
2392 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2393 {
2394 struct ieee80211_sub_if_data *sdata =
2395 container_of(work, struct ieee80211_sub_if_data,
2396 u.mgd.beacon_connection_loss_work);
2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2398 struct sta_info *sta;
2399
2400 if (ifmgd->associated) {
2401 rcu_read_lock();
2402 sta = sta_info_get(sdata, ifmgd->bssid);
2403 if (sta)
2404 sta->beacon_loss_count++;
2405 rcu_read_unlock();
2406 }
2407
2408 if (ifmgd->connection_loss) {
2409 sdata_info(sdata, "Connection to AP %pM lost\n",
2410 ifmgd->bssid);
2411 __ieee80211_disconnect(sdata);
2412 } else {
2413 ieee80211_mgd_probe_ap(sdata, true);
2414 }
2415 }
2416
2417 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2418 {
2419 struct ieee80211_sub_if_data *sdata =
2420 container_of(work, struct ieee80211_sub_if_data,
2421 u.mgd.csa_connection_drop_work);
2422
2423 __ieee80211_disconnect(sdata);
2424 }
2425
2426 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2427 {
2428 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2429 struct ieee80211_hw *hw = &sdata->local->hw;
2430
2431 trace_api_beacon_loss(sdata);
2432
2433 sdata->u.mgd.connection_loss = false;
2434 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2435 }
2436 EXPORT_SYMBOL(ieee80211_beacon_loss);
2437
2438 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2439 {
2440 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2441 struct ieee80211_hw *hw = &sdata->local->hw;
2442
2443 trace_api_connection_loss(sdata);
2444
2445 sdata->u.mgd.connection_loss = true;
2446 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2447 }
2448 EXPORT_SYMBOL(ieee80211_connection_loss);
2449
2450
2451 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2452 bool assoc)
2453 {
2454 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2455
2456 sdata_assert_lock(sdata);
2457
2458 if (!assoc) {
2459 /*
2460 * we are not authenticated yet, the only timer that could be
2461 * running is the timeout for the authentication response which
2462 * which is not relevant anymore.
2463 */
2464 del_timer_sync(&sdata->u.mgd.timer);
2465 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2466
2467 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2468 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2469 sdata->u.mgd.flags = 0;
2470 mutex_lock(&sdata->local->mtx);
2471 ieee80211_vif_release_channel(sdata);
2472 mutex_unlock(&sdata->local->mtx);
2473 }
2474
2475 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2476 kfree(auth_data);
2477 sdata->u.mgd.auth_data = NULL;
2478 }
2479
2480 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2481 struct ieee80211_mgmt *mgmt, size_t len)
2482 {
2483 struct ieee80211_local *local = sdata->local;
2484 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2485 u8 *pos;
2486 struct ieee802_11_elems elems;
2487 u32 tx_flags = 0;
2488
2489 pos = mgmt->u.auth.variable;
2490 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2491 if (!elems.challenge)
2492 return;
2493 auth_data->expected_transaction = 4;
2494 drv_mgd_prepare_tx(sdata->local, sdata);
2495 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2496 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2497 IEEE80211_TX_INTFL_MLME_CONN_TX;
2498 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2499 elems.challenge - 2, elems.challenge_len + 2,
2500 auth_data->bss->bssid, auth_data->bss->bssid,
2501 auth_data->key, auth_data->key_len,
2502 auth_data->key_idx, tx_flags);
2503 }
2504
2505 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2506 struct ieee80211_mgmt *mgmt, size_t len)
2507 {
2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509 u8 bssid[ETH_ALEN];
2510 u16 auth_alg, auth_transaction, status_code;
2511 struct sta_info *sta;
2512
2513 sdata_assert_lock(sdata);
2514
2515 if (len < 24 + 6)
2516 return;
2517
2518 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2519 return;
2520
2521 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2522
2523 if (!ether_addr_equal(bssid, mgmt->bssid))
2524 return;
2525
2526 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2527 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2528 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2529
2530 if (auth_alg != ifmgd->auth_data->algorithm ||
2531 auth_transaction != ifmgd->auth_data->expected_transaction) {
2532 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2533 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2534 auth_transaction,
2535 ifmgd->auth_data->expected_transaction);
2536 return;
2537 }
2538
2539 if (status_code != WLAN_STATUS_SUCCESS) {
2540 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2541 mgmt->sa, status_code);
2542 ieee80211_destroy_auth_data(sdata, false);
2543 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2544 return;
2545 }
2546
2547 switch (ifmgd->auth_data->algorithm) {
2548 case WLAN_AUTH_OPEN:
2549 case WLAN_AUTH_LEAP:
2550 case WLAN_AUTH_FT:
2551 case WLAN_AUTH_SAE:
2552 break;
2553 case WLAN_AUTH_SHARED_KEY:
2554 if (ifmgd->auth_data->expected_transaction != 4) {
2555 ieee80211_auth_challenge(sdata, mgmt, len);
2556 /* need another frame */
2557 return;
2558 }
2559 break;
2560 default:
2561 WARN_ONCE(1, "invalid auth alg %d",
2562 ifmgd->auth_data->algorithm);
2563 return;
2564 }
2565
2566 sdata_info(sdata, "authenticated\n");
2567 ifmgd->auth_data->done = true;
2568 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2569 ifmgd->auth_data->timeout_started = true;
2570 run_again(sdata, ifmgd->auth_data->timeout);
2571
2572 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2573 ifmgd->auth_data->expected_transaction != 2) {
2574 /*
2575 * Report auth frame to user space for processing since another
2576 * round of Authentication frames is still needed.
2577 */
2578 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2579 return;
2580 }
2581
2582 /* move station state to auth */
2583 mutex_lock(&sdata->local->sta_mtx);
2584 sta = sta_info_get(sdata, bssid);
2585 if (!sta) {
2586 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2587 goto out_err;
2588 }
2589 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2590 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2591 goto out_err;
2592 }
2593 mutex_unlock(&sdata->local->sta_mtx);
2594
2595 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2596 return;
2597 out_err:
2598 mutex_unlock(&sdata->local->sta_mtx);
2599 /* ignore frame -- wait for timeout */
2600 }
2601
2602 #define case_WLAN(type) \
2603 case WLAN_REASON_##type: return #type
2604
2605 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2606 {
2607 switch (reason_code) {
2608 case_WLAN(UNSPECIFIED);
2609 case_WLAN(PREV_AUTH_NOT_VALID);
2610 case_WLAN(DEAUTH_LEAVING);
2611 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2612 case_WLAN(DISASSOC_AP_BUSY);
2613 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2614 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2615 case_WLAN(DISASSOC_STA_HAS_LEFT);
2616 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2617 case_WLAN(DISASSOC_BAD_POWER);
2618 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2619 case_WLAN(INVALID_IE);
2620 case_WLAN(MIC_FAILURE);
2621 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2622 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2623 case_WLAN(IE_DIFFERENT);
2624 case_WLAN(INVALID_GROUP_CIPHER);
2625 case_WLAN(INVALID_PAIRWISE_CIPHER);
2626 case_WLAN(INVALID_AKMP);
2627 case_WLAN(UNSUPP_RSN_VERSION);
2628 case_WLAN(INVALID_RSN_IE_CAP);
2629 case_WLAN(IEEE8021X_FAILED);
2630 case_WLAN(CIPHER_SUITE_REJECTED);
2631 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2632 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2633 case_WLAN(DISASSOC_LOW_ACK);
2634 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2635 case_WLAN(QSTA_LEAVE_QBSS);
2636 case_WLAN(QSTA_NOT_USE);
2637 case_WLAN(QSTA_REQUIRE_SETUP);
2638 case_WLAN(QSTA_TIMEOUT);
2639 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2640 case_WLAN(MESH_PEER_CANCELED);
2641 case_WLAN(MESH_MAX_PEERS);
2642 case_WLAN(MESH_CONFIG);
2643 case_WLAN(MESH_CLOSE);
2644 case_WLAN(MESH_MAX_RETRIES);
2645 case_WLAN(MESH_CONFIRM_TIMEOUT);
2646 case_WLAN(MESH_INVALID_GTK);
2647 case_WLAN(MESH_INCONSISTENT_PARAM);
2648 case_WLAN(MESH_INVALID_SECURITY);
2649 case_WLAN(MESH_PATH_ERROR);
2650 case_WLAN(MESH_PATH_NOFORWARD);
2651 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2652 case_WLAN(MAC_EXISTS_IN_MBSS);
2653 case_WLAN(MESH_CHAN_REGULATORY);
2654 case_WLAN(MESH_CHAN);
2655 default: return "<unknown>";
2656 }
2657 }
2658
2659 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2660 struct ieee80211_mgmt *mgmt, size_t len)
2661 {
2662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2663 const u8 *bssid = NULL;
2664 u16 reason_code;
2665
2666 sdata_assert_lock(sdata);
2667
2668 if (len < 24 + 2)
2669 return;
2670
2671 if (!ifmgd->associated ||
2672 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2673 return;
2674
2675 bssid = ifmgd->associated->bssid;
2676
2677 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2678
2679 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2680 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2681
2682 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2683
2684 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2685 }
2686
2687
2688 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2689 struct ieee80211_mgmt *mgmt, size_t len)
2690 {
2691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2692 u16 reason_code;
2693
2694 sdata_assert_lock(sdata);
2695
2696 if (len < 24 + 2)
2697 return;
2698
2699 if (!ifmgd->associated ||
2700 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2701 return;
2702
2703 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2704
2705 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2706 mgmt->sa, reason_code);
2707
2708 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2709
2710 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2711 }
2712
2713 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2714 u8 *supp_rates, unsigned int supp_rates_len,
2715 u32 *rates, u32 *basic_rates,
2716 bool *have_higher_than_11mbit,
2717 int *min_rate, int *min_rate_index,
2718 int shift, u32 rate_flags)
2719 {
2720 int i, j;
2721
2722 for (i = 0; i < supp_rates_len; i++) {
2723 int rate = supp_rates[i] & 0x7f;
2724 bool is_basic = !!(supp_rates[i] & 0x80);
2725
2726 if ((rate * 5 * (1 << shift)) > 110)
2727 *have_higher_than_11mbit = true;
2728
2729 /*
2730 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2731 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2732 *
2733 * Note: Even through the membership selector and the basic
2734 * rate flag share the same bit, they are not exactly
2735 * the same.
2736 */
2737 if (!!(supp_rates[i] & 0x80) &&
2738 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2739 continue;
2740
2741 for (j = 0; j < sband->n_bitrates; j++) {
2742 struct ieee80211_rate *br;
2743 int brate;
2744
2745 br = &sband->bitrates[j];
2746 if ((rate_flags & br->flags) != rate_flags)
2747 continue;
2748
2749 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2750 if (brate == rate) {
2751 *rates |= BIT(j);
2752 if (is_basic)
2753 *basic_rates |= BIT(j);
2754 if ((rate * 5) < *min_rate) {
2755 *min_rate = rate * 5;
2756 *min_rate_index = j;
2757 }
2758 break;
2759 }
2760 }
2761 }
2762 }
2763
2764 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2765 bool assoc)
2766 {
2767 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2768
2769 sdata_assert_lock(sdata);
2770
2771 if (!assoc) {
2772 /*
2773 * we are not associated yet, the only timer that could be
2774 * running is the timeout for the association response which
2775 * which is not relevant anymore.
2776 */
2777 del_timer_sync(&sdata->u.mgd.timer);
2778 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2779
2780 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2781 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2782 sdata->u.mgd.flags = 0;
2783 mutex_lock(&sdata->local->mtx);
2784 ieee80211_vif_release_channel(sdata);
2785 mutex_unlock(&sdata->local->mtx);
2786 }
2787
2788 kfree(assoc_data);
2789 sdata->u.mgd.assoc_data = NULL;
2790 }
2791
2792 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2793 struct cfg80211_bss *cbss,
2794 struct ieee80211_mgmt *mgmt, size_t len)
2795 {
2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2797 struct ieee80211_local *local = sdata->local;
2798 struct ieee80211_supported_band *sband;
2799 struct sta_info *sta;
2800 u8 *pos;
2801 u16 capab_info, aid;
2802 struct ieee802_11_elems elems;
2803 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2804 const struct cfg80211_bss_ies *bss_ies = NULL;
2805 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2806 u32 changed = 0;
2807 int err;
2808 bool ret;
2809
2810 /* AssocResp and ReassocResp have identical structure */
2811
2812 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2813 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2814
2815 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2816 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2817 aid);
2818 aid &= ~(BIT(15) | BIT(14));
2819
2820 ifmgd->broken_ap = false;
2821
2822 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2823 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2824 aid);
2825 aid = 0;
2826 ifmgd->broken_ap = true;
2827 }
2828
2829 pos = mgmt->u.assoc_resp.variable;
2830 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2831
2832 if (!elems.supp_rates) {
2833 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2834 return false;
2835 }
2836
2837 ifmgd->aid = aid;
2838 ifmgd->tdls_chan_switch_prohibited =
2839 elems.ext_capab && elems.ext_capab_len >= 5 &&
2840 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
2841
2842 /*
2843 * Some APs are erroneously not including some information in their
2844 * (re)association response frames. Try to recover by using the data
2845 * from the beacon or probe response. This seems to afflict mobile
2846 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2847 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2848 */
2849 if ((assoc_data->wmm && !elems.wmm_param) ||
2850 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2851 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2852 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2853 (!elems.vht_cap_elem || !elems.vht_operation))) {
2854 const struct cfg80211_bss_ies *ies;
2855 struct ieee802_11_elems bss_elems;
2856
2857 rcu_read_lock();
2858 ies = rcu_dereference(cbss->ies);
2859 if (ies)
2860 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2861 GFP_ATOMIC);
2862 rcu_read_unlock();
2863 if (!bss_ies)
2864 return false;
2865
2866 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2867 false, &bss_elems);
2868 if (assoc_data->wmm &&
2869 !elems.wmm_param && bss_elems.wmm_param) {
2870 elems.wmm_param = bss_elems.wmm_param;
2871 sdata_info(sdata,
2872 "AP bug: WMM param missing from AssocResp\n");
2873 }
2874
2875 /*
2876 * Also check if we requested HT/VHT, otherwise the AP doesn't
2877 * have to include the IEs in the (re)association response.
2878 */
2879 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2880 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2881 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2882 sdata_info(sdata,
2883 "AP bug: HT capability missing from AssocResp\n");
2884 }
2885 if (!elems.ht_operation && bss_elems.ht_operation &&
2886 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2887 elems.ht_operation = bss_elems.ht_operation;
2888 sdata_info(sdata,
2889 "AP bug: HT operation missing from AssocResp\n");
2890 }
2891 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2892 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2893 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2894 sdata_info(sdata,
2895 "AP bug: VHT capa missing from AssocResp\n");
2896 }
2897 if (!elems.vht_operation && bss_elems.vht_operation &&
2898 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2899 elems.vht_operation = bss_elems.vht_operation;
2900 sdata_info(sdata,
2901 "AP bug: VHT operation missing from AssocResp\n");
2902 }
2903 }
2904
2905 /*
2906 * We previously checked these in the beacon/probe response, so
2907 * they should be present here. This is just a safety net.
2908 */
2909 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2910 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2911 sdata_info(sdata,
2912 "HT AP is missing WMM params or HT capability/operation\n");
2913 ret = false;
2914 goto out;
2915 }
2916
2917 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2918 (!elems.vht_cap_elem || !elems.vht_operation)) {
2919 sdata_info(sdata,
2920 "VHT AP is missing VHT capability/operation\n");
2921 ret = false;
2922 goto out;
2923 }
2924
2925 mutex_lock(&sdata->local->sta_mtx);
2926 /*
2927 * station info was already allocated and inserted before
2928 * the association and should be available to us
2929 */
2930 sta = sta_info_get(sdata, cbss->bssid);
2931 if (WARN_ON(!sta)) {
2932 mutex_unlock(&sdata->local->sta_mtx);
2933 ret = false;
2934 goto out;
2935 }
2936
2937 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2938
2939 /* Set up internal HT/VHT capabilities */
2940 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2941 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2942 elems.ht_cap_elem, sta);
2943
2944 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2945 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2946 elems.vht_cap_elem, sta);
2947
2948 /*
2949 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2950 * in their association response, so ignore that data for our own
2951 * configuration. If it changed since the last beacon, we'll get the
2952 * next beacon and update then.
2953 */
2954
2955 /*
2956 * If an operating mode notification IE is present, override the
2957 * NSS calculation (that would be done in rate_control_rate_init())
2958 * and use the # of streams from that element.
2959 */
2960 if (elems.opmode_notif &&
2961 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2962 u8 nss;
2963
2964 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2965 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2966 nss += 1;
2967 sta->sta.rx_nss = nss;
2968 }
2969
2970 rate_control_rate_init(sta);
2971
2972 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2973 set_sta_flag(sta, WLAN_STA_MFP);
2974
2975 sta->sta.wme = elems.wmm_param;
2976
2977 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2978 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2979 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2980 if (err) {
2981 sdata_info(sdata,
2982 "failed to move station %pM to desired state\n",
2983 sta->sta.addr);
2984 WARN_ON(__sta_info_destroy(sta));
2985 mutex_unlock(&sdata->local->sta_mtx);
2986 ret = false;
2987 goto out;
2988 }
2989
2990 mutex_unlock(&sdata->local->sta_mtx);
2991
2992 /*
2993 * Always handle WMM once after association regardless
2994 * of the first value the AP uses. Setting -1 here has
2995 * that effect because the AP values is an unsigned
2996 * 4-bit value.
2997 */
2998 ifmgd->wmm_last_param_set = -1;
2999
3000 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
3001 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3002 elems.wmm_param_len);
3003 else
3004 ieee80211_set_wmm_default(sdata, false);
3005 changed |= BSS_CHANGED_QOS;
3006
3007 /* set AID and assoc capability,
3008 * ieee80211_set_associated() will tell the driver */
3009 bss_conf->aid = aid;
3010 bss_conf->assoc_capability = capab_info;
3011 ieee80211_set_associated(sdata, cbss, changed);
3012
3013 /*
3014 * If we're using 4-addr mode, let the AP know that we're
3015 * doing so, so that it can create the STA VLAN on its side
3016 */
3017 if (ifmgd->use_4addr)
3018 ieee80211_send_4addr_nullfunc(local, sdata);
3019
3020 /*
3021 * Start timer to probe the connection to the AP now.
3022 * Also start the timer that will detect beacon loss.
3023 */
3024 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
3025 ieee80211_sta_reset_beacon_monitor(sdata);
3026
3027 ret = true;
3028 out:
3029 kfree(bss_ies);
3030 return ret;
3031 }
3032
3033 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3034 struct ieee80211_mgmt *mgmt,
3035 size_t len)
3036 {
3037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3038 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3039 u16 capab_info, status_code, aid;
3040 struct ieee802_11_elems elems;
3041 int ac, uapsd_queues = -1;
3042 u8 *pos;
3043 bool reassoc;
3044 struct cfg80211_bss *bss;
3045
3046 sdata_assert_lock(sdata);
3047
3048 if (!assoc_data)
3049 return;
3050 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
3051 return;
3052
3053 /*
3054 * AssocResp and ReassocResp have identical structure, so process both
3055 * of them in this function.
3056 */
3057
3058 if (len < 24 + 6)
3059 return;
3060
3061 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3062 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3063 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3064 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3065
3066 sdata_info(sdata,
3067 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3068 reassoc ? "Rea" : "A", mgmt->sa,
3069 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
3070
3071 pos = mgmt->u.assoc_resp.variable;
3072 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
3073
3074 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
3075 elems.timeout_int &&
3076 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
3077 u32 tu, ms;
3078 tu = le32_to_cpu(elems.timeout_int->value);
3079 ms = tu * 1024 / 1000;
3080 sdata_info(sdata,
3081 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3082 mgmt->sa, tu, ms);
3083 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
3084 assoc_data->timeout_started = true;
3085 if (ms > IEEE80211_ASSOC_TIMEOUT)
3086 run_again(sdata, assoc_data->timeout);
3087 return;
3088 }
3089
3090 bss = assoc_data->bss;
3091
3092 if (status_code != WLAN_STATUS_SUCCESS) {
3093 sdata_info(sdata, "%pM denied association (code=%d)\n",
3094 mgmt->sa, status_code);
3095 ieee80211_destroy_assoc_data(sdata, false);
3096 } else {
3097 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
3098 /* oops -- internal error -- send timeout for now */
3099 ieee80211_destroy_assoc_data(sdata, false);
3100 cfg80211_assoc_timeout(sdata->dev, bss);
3101 return;
3102 }
3103 sdata_info(sdata, "associated\n");
3104
3105 /*
3106 * destroy assoc_data afterwards, as otherwise an idle
3107 * recalc after assoc_data is NULL but before associated
3108 * is set can cause the interface to go idle
3109 */
3110 ieee80211_destroy_assoc_data(sdata, true);
3111
3112 /* get uapsd queues configuration */
3113 uapsd_queues = 0;
3114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3115 if (sdata->tx_conf[ac].uapsd)
3116 uapsd_queues |= BIT(ac);
3117 }
3118
3119 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
3120 }
3121
3122 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
3123 struct ieee80211_mgmt *mgmt, size_t len,
3124 struct ieee80211_rx_status *rx_status,
3125 struct ieee802_11_elems *elems)
3126 {
3127 struct ieee80211_local *local = sdata->local;
3128 struct ieee80211_bss *bss;
3129 struct ieee80211_channel *channel;
3130
3131 sdata_assert_lock(sdata);
3132
3133 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3134 if (!channel)
3135 return;
3136
3137 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
3138 channel);
3139 if (bss) {
3140 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
3141 ieee80211_rx_bss_put(local, bss);
3142 }
3143 }
3144
3145
3146 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
3147 struct sk_buff *skb)
3148 {
3149 struct ieee80211_mgmt *mgmt = (void *)skb->data;
3150 struct ieee80211_if_managed *ifmgd;
3151 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3152 size_t baselen, len = skb->len;
3153 struct ieee802_11_elems elems;
3154
3155 ifmgd = &sdata->u.mgd;
3156
3157 sdata_assert_lock(sdata);
3158
3159 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
3160 return; /* ignore ProbeResp to foreign address */
3161
3162 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3163 if (baselen > len)
3164 return;
3165
3166 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
3167 false, &elems);
3168
3169 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3170
3171 if (ifmgd->associated &&
3172 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3173 ieee80211_reset_ap_probe(sdata);
3174
3175 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
3176 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
3177 /* got probe response, continue with auth */
3178 sdata_info(sdata, "direct probe responded\n");
3179 ifmgd->auth_data->tries = 0;
3180 ifmgd->auth_data->timeout = jiffies;
3181 ifmgd->auth_data->timeout_started = true;
3182 run_again(sdata, ifmgd->auth_data->timeout);
3183 }
3184 }
3185
3186 /*
3187 * This is the canonical list of information elements we care about,
3188 * the filter code also gives us all changes to the Microsoft OUI
3189 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3190 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3191 * changes to requested client power.
3192 *
3193 * We implement beacon filtering in software since that means we can
3194 * avoid processing the frame here and in cfg80211, and userspace
3195 * will not be able to tell whether the hardware supports it or not.
3196 *
3197 * XXX: This list needs to be dynamic -- userspace needs to be able to
3198 * add items it requires. It also needs to be able to tell us to
3199 * look out for other vendor IEs.
3200 */
3201 static const u64 care_about_ies =
3202 (1ULL << WLAN_EID_COUNTRY) |
3203 (1ULL << WLAN_EID_ERP_INFO) |
3204 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3205 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3206 (1ULL << WLAN_EID_HT_CAPABILITY) |
3207 (1ULL << WLAN_EID_HT_OPERATION);
3208
3209 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3210 struct ieee80211_mgmt *mgmt, size_t len,
3211 struct ieee80211_rx_status *rx_status)
3212 {
3213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3214 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3215 size_t baselen;
3216 struct ieee802_11_elems elems;
3217 struct ieee80211_local *local = sdata->local;
3218 struct ieee80211_chanctx_conf *chanctx_conf;
3219 struct ieee80211_channel *chan;
3220 struct sta_info *sta;
3221 u32 changed = 0;
3222 bool erp_valid;
3223 u8 erp_value = 0;
3224 u32 ncrc;
3225 u8 *bssid;
3226 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3227
3228 sdata_assert_lock(sdata);
3229
3230 /* Process beacon from the current BSS */
3231 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3232 if (baselen > len)
3233 return;
3234
3235 rcu_read_lock();
3236 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3237 if (!chanctx_conf) {
3238 rcu_read_unlock();
3239 return;
3240 }
3241
3242 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
3243 rcu_read_unlock();
3244 return;
3245 }
3246 chan = chanctx_conf->def.chan;
3247 rcu_read_unlock();
3248
3249 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
3250 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
3251 ieee802_11_parse_elems(mgmt->u.beacon.variable,
3252 len - baselen, false, &elems);
3253
3254 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3255 if (elems.tim && !elems.parse_error) {
3256 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3257 ifmgd->dtim_period = tim_ie->dtim_period;
3258 }
3259 ifmgd->have_beacon = true;
3260 ifmgd->assoc_data->need_beacon = false;
3261 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3262 sdata->vif.bss_conf.sync_tsf =
3263 le64_to_cpu(mgmt->u.beacon.timestamp);
3264 sdata->vif.bss_conf.sync_device_ts =
3265 rx_status->device_timestamp;
3266 if (elems.tim)
3267 sdata->vif.bss_conf.sync_dtim_count =
3268 elems.tim->dtim_count;
3269 else
3270 sdata->vif.bss_conf.sync_dtim_count = 0;
3271 }
3272 /* continue assoc process */
3273 ifmgd->assoc_data->timeout = jiffies;
3274 ifmgd->assoc_data->timeout_started = true;
3275 run_again(sdata, ifmgd->assoc_data->timeout);
3276 return;
3277 }
3278
3279 if (!ifmgd->associated ||
3280 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
3281 return;
3282 bssid = ifmgd->associated->bssid;
3283
3284 /* Track average RSSI from the Beacon frames of the current AP */
3285 ifmgd->last_beacon_signal = rx_status->signal;
3286 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3287 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3288 ifmgd->ave_beacon_signal = rx_status->signal * 16;
3289 ifmgd->last_cqm_event_signal = 0;
3290 ifmgd->count_beacon_signal = 1;
3291 ifmgd->last_ave_beacon_signal = 0;
3292 } else {
3293 ifmgd->ave_beacon_signal =
3294 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3295 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3296 ifmgd->ave_beacon_signal) / 16;
3297 ifmgd->count_beacon_signal++;
3298 }
3299
3300 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3301 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3302 int sig = ifmgd->ave_beacon_signal;
3303 int last_sig = ifmgd->last_ave_beacon_signal;
3304
3305 /*
3306 * if signal crosses either of the boundaries, invoke callback
3307 * with appropriate parameters
3308 */
3309 if (sig > ifmgd->rssi_max_thold &&
3310 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3311 ifmgd->last_ave_beacon_signal = sig;
3312 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3313 } else if (sig < ifmgd->rssi_min_thold &&
3314 (last_sig >= ifmgd->rssi_max_thold ||
3315 last_sig == 0)) {
3316 ifmgd->last_ave_beacon_signal = sig;
3317 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3318 }
3319 }
3320
3321 if (bss_conf->cqm_rssi_thold &&
3322 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3323 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3324 int sig = ifmgd->ave_beacon_signal / 16;
3325 int last_event = ifmgd->last_cqm_event_signal;
3326 int thold = bss_conf->cqm_rssi_thold;
3327 int hyst = bss_conf->cqm_rssi_hyst;
3328 if (sig < thold &&
3329 (last_event == 0 || sig < last_event - hyst)) {
3330 ifmgd->last_cqm_event_signal = sig;
3331 ieee80211_cqm_rssi_notify(
3332 &sdata->vif,
3333 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3334 GFP_KERNEL);
3335 } else if (sig > thold &&
3336 (last_event == 0 || sig > last_event + hyst)) {
3337 ifmgd->last_cqm_event_signal = sig;
3338 ieee80211_cqm_rssi_notify(
3339 &sdata->vif,
3340 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3341 GFP_KERNEL);
3342 }
3343 }
3344
3345 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3346 mlme_dbg_ratelimited(sdata,
3347 "cancelling AP probe due to a received beacon\n");
3348 ieee80211_reset_ap_probe(sdata);
3349 }
3350
3351 /*
3352 * Push the beacon loss detection into the future since
3353 * we are processing a beacon from the AP just now.
3354 */
3355 ieee80211_sta_reset_beacon_monitor(sdata);
3356
3357 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3358 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3359 len - baselen, false, &elems,
3360 care_about_ies, ncrc);
3361
3362 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3363 bool directed_tim = ieee80211_check_tim(elems.tim,
3364 elems.tim_len,
3365 ifmgd->aid);
3366 if (directed_tim) {
3367 if (local->hw.conf.dynamic_ps_timeout > 0) {
3368 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3369 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3370 ieee80211_hw_config(local,
3371 IEEE80211_CONF_CHANGE_PS);
3372 }
3373 ieee80211_send_nullfunc(local, sdata, 0);
3374 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3375 local->pspolling = true;
3376
3377 /*
3378 * Here is assumed that the driver will be
3379 * able to send ps-poll frame and receive a
3380 * response even though power save mode is
3381 * enabled, but some drivers might require
3382 * to disable power save here. This needs
3383 * to be investigated.
3384 */
3385 ieee80211_send_pspoll(local, sdata);
3386 }
3387 }
3388 }
3389
3390 if (sdata->vif.p2p) {
3391 struct ieee80211_p2p_noa_attr noa = {};
3392 int ret;
3393
3394 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3395 len - baselen,
3396 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3397 (u8 *) &noa, sizeof(noa));
3398 if (ret >= 2) {
3399 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3400 /* valid noa_attr and index changed */
3401 sdata->u.mgd.p2p_noa_index = noa.index;
3402 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3403 changed |= BSS_CHANGED_P2P_PS;
3404 /*
3405 * make sure we update all information, the CRC
3406 * mechanism doesn't look at P2P attributes.
3407 */
3408 ifmgd->beacon_crc_valid = false;
3409 }
3410 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3411 /* noa_attr not found and we had valid noa_attr before */
3412 sdata->u.mgd.p2p_noa_index = -1;
3413 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3414 changed |= BSS_CHANGED_P2P_PS;
3415 ifmgd->beacon_crc_valid = false;
3416 }
3417 }
3418
3419 if (ifmgd->csa_waiting_bcn)
3420 ieee80211_chswitch_post_beacon(sdata);
3421
3422 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3423 return;
3424 ifmgd->beacon_crc = ncrc;
3425 ifmgd->beacon_crc_valid = true;
3426
3427 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3428
3429 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3430 rx_status->device_timestamp,
3431 &elems, true);
3432
3433 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3434 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3435 elems.wmm_param_len))
3436 changed |= BSS_CHANGED_QOS;
3437
3438 /*
3439 * If we haven't had a beacon before, tell the driver about the
3440 * DTIM period (and beacon timing if desired) now.
3441 */
3442 if (!ifmgd->have_beacon) {
3443 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3444 if (elems.tim)
3445 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3446 else
3447 bss_conf->dtim_period = 1;
3448
3449 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3450 sdata->vif.bss_conf.sync_tsf =
3451 le64_to_cpu(mgmt->u.beacon.timestamp);
3452 sdata->vif.bss_conf.sync_device_ts =
3453 rx_status->device_timestamp;
3454 if (elems.tim)
3455 sdata->vif.bss_conf.sync_dtim_count =
3456 elems.tim->dtim_count;
3457 else
3458 sdata->vif.bss_conf.sync_dtim_count = 0;
3459 }
3460
3461 changed |= BSS_CHANGED_BEACON_INFO;
3462 ifmgd->have_beacon = true;
3463
3464 mutex_lock(&local->iflist_mtx);
3465 ieee80211_recalc_ps(local, -1);
3466 mutex_unlock(&local->iflist_mtx);
3467
3468 ieee80211_recalc_ps_vif(sdata);
3469 }
3470
3471 if (elems.erp_info) {
3472 erp_valid = true;
3473 erp_value = elems.erp_info[0];
3474 } else {
3475 erp_valid = false;
3476 }
3477 changed |= ieee80211_handle_bss_capability(sdata,
3478 le16_to_cpu(mgmt->u.beacon.capab_info),
3479 erp_valid, erp_value);
3480
3481 mutex_lock(&local->sta_mtx);
3482 sta = sta_info_get(sdata, bssid);
3483
3484 if (ieee80211_config_bw(sdata, sta,
3485 elems.ht_cap_elem, elems.ht_operation,
3486 elems.vht_operation, bssid, &changed)) {
3487 mutex_unlock(&local->sta_mtx);
3488 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3489 WLAN_REASON_DEAUTH_LEAVING,
3490 true, deauth_buf);
3491 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3492 sizeof(deauth_buf));
3493 return;
3494 }
3495
3496 if (sta && elems.opmode_notif)
3497 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3498 rx_status->band, true);
3499 mutex_unlock(&local->sta_mtx);
3500
3501 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3502 elems.country_elem,
3503 elems.country_elem_len,
3504 elems.pwr_constr_elem,
3505 elems.cisco_dtpc_elem);
3506
3507 ieee80211_bss_info_change_notify(sdata, changed);
3508 }
3509
3510 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3511 struct sk_buff *skb)
3512 {
3513 struct ieee80211_rx_status *rx_status;
3514 struct ieee80211_mgmt *mgmt;
3515 u16 fc;
3516 struct ieee802_11_elems elems;
3517 int ies_len;
3518
3519 rx_status = (struct ieee80211_rx_status *) skb->cb;
3520 mgmt = (struct ieee80211_mgmt *) skb->data;
3521 fc = le16_to_cpu(mgmt->frame_control);
3522
3523 sdata_lock(sdata);
3524
3525 switch (fc & IEEE80211_FCTL_STYPE) {
3526 case IEEE80211_STYPE_BEACON:
3527 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3528 break;
3529 case IEEE80211_STYPE_PROBE_RESP:
3530 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3531 break;
3532 case IEEE80211_STYPE_AUTH:
3533 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3534 break;
3535 case IEEE80211_STYPE_DEAUTH:
3536 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3537 break;
3538 case IEEE80211_STYPE_DISASSOC:
3539 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3540 break;
3541 case IEEE80211_STYPE_ASSOC_RESP:
3542 case IEEE80211_STYPE_REASSOC_RESP:
3543 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3544 break;
3545 case IEEE80211_STYPE_ACTION:
3546 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3547 ies_len = skb->len -
3548 offsetof(struct ieee80211_mgmt,
3549 u.action.u.chan_switch.variable);
3550
3551 if (ies_len < 0)
3552 break;
3553
3554 ieee802_11_parse_elems(
3555 mgmt->u.action.u.chan_switch.variable,
3556 ies_len, true, &elems);
3557
3558 if (elems.parse_error)
3559 break;
3560
3561 ieee80211_sta_process_chanswitch(sdata,
3562 rx_status->mactime,
3563 rx_status->device_timestamp,
3564 &elems, false);
3565 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3566 ies_len = skb->len -
3567 offsetof(struct ieee80211_mgmt,
3568 u.action.u.ext_chan_switch.variable);
3569
3570 if (ies_len < 0)
3571 break;
3572
3573 ieee802_11_parse_elems(
3574 mgmt->u.action.u.ext_chan_switch.variable,
3575 ies_len, true, &elems);
3576
3577 if (elems.parse_error)
3578 break;
3579
3580 /* for the handling code pretend this was also an IE */
3581 elems.ext_chansw_ie =
3582 &mgmt->u.action.u.ext_chan_switch.data;
3583
3584 ieee80211_sta_process_chanswitch(sdata,
3585 rx_status->mactime,
3586 rx_status->device_timestamp,
3587 &elems, false);
3588 }
3589 break;
3590 }
3591 sdata_unlock(sdata);
3592 }
3593
3594 static void ieee80211_sta_timer(unsigned long data)
3595 {
3596 struct ieee80211_sub_if_data *sdata =
3597 (struct ieee80211_sub_if_data *) data;
3598
3599 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3600 }
3601
3602 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3603 u8 *bssid, u8 reason, bool tx)
3604 {
3605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3606
3607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3608 tx, frame_buf);
3609
3610 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3611 IEEE80211_DEAUTH_FRAME_LEN);
3612 }
3613
3614 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3615 {
3616 struct ieee80211_local *local = sdata->local;
3617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3618 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3619 u32 tx_flags = 0;
3620
3621 sdata_assert_lock(sdata);
3622
3623 if (WARN_ON_ONCE(!auth_data))
3624 return -EINVAL;
3625
3626 auth_data->tries++;
3627
3628 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3629 sdata_info(sdata, "authentication with %pM timed out\n",
3630 auth_data->bss->bssid);
3631
3632 /*
3633 * Most likely AP is not in the range so remove the
3634 * bss struct for that AP.
3635 */
3636 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3637
3638 return -ETIMEDOUT;
3639 }
3640
3641 drv_mgd_prepare_tx(local, sdata);
3642
3643 if (auth_data->bss->proberesp_ies) {
3644 u16 trans = 1;
3645 u16 status = 0;
3646
3647 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3648 auth_data->bss->bssid, auth_data->tries,
3649 IEEE80211_AUTH_MAX_TRIES);
3650
3651 auth_data->expected_transaction = 2;
3652
3653 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3654 trans = auth_data->sae_trans;
3655 status = auth_data->sae_status;
3656 auth_data->expected_transaction = trans;
3657 }
3658
3659 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3660 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3661 IEEE80211_TX_INTFL_MLME_CONN_TX;
3662
3663 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3664 auth_data->data, auth_data->data_len,
3665 auth_data->bss->bssid,
3666 auth_data->bss->bssid, NULL, 0, 0,
3667 tx_flags);
3668 } else {
3669 const u8 *ssidie;
3670
3671 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3672 auth_data->bss->bssid, auth_data->tries,
3673 IEEE80211_AUTH_MAX_TRIES);
3674
3675 rcu_read_lock();
3676 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3677 if (!ssidie) {
3678 rcu_read_unlock();
3679 return -EINVAL;
3680 }
3681 /*
3682 * Direct probe is sent to broadcast address as some APs
3683 * will not answer to direct packet in unassociated state.
3684 */
3685 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3686 ssidie + 2, ssidie[1],
3687 NULL, 0, (u32) -1, true, 0,
3688 auth_data->bss->channel, false);
3689 rcu_read_unlock();
3690 }
3691
3692 if (tx_flags == 0) {
3693 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3694 auth_data->timeout_started = true;
3695 run_again(sdata, auth_data->timeout);
3696 } else {
3697 auth_data->timeout =
3698 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3699 auth_data->timeout_started = true;
3700 run_again(sdata, auth_data->timeout);
3701 }
3702
3703 return 0;
3704 }
3705
3706 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3707 {
3708 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3709 struct ieee80211_local *local = sdata->local;
3710
3711 sdata_assert_lock(sdata);
3712
3713 assoc_data->tries++;
3714 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3715 sdata_info(sdata, "association with %pM timed out\n",
3716 assoc_data->bss->bssid);
3717
3718 /*
3719 * Most likely AP is not in the range so remove the
3720 * bss struct for that AP.
3721 */
3722 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3723
3724 return -ETIMEDOUT;
3725 }
3726
3727 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3728 assoc_data->bss->bssid, assoc_data->tries,
3729 IEEE80211_ASSOC_MAX_TRIES);
3730 ieee80211_send_assoc(sdata);
3731
3732 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3733 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3734 assoc_data->timeout_started = true;
3735 run_again(sdata, assoc_data->timeout);
3736 } else {
3737 assoc_data->timeout =
3738 round_jiffies_up(jiffies +
3739 IEEE80211_ASSOC_TIMEOUT_LONG);
3740 assoc_data->timeout_started = true;
3741 run_again(sdata, assoc_data->timeout);
3742 }
3743
3744 return 0;
3745 }
3746
3747 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3748 __le16 fc, bool acked)
3749 {
3750 struct ieee80211_local *local = sdata->local;
3751
3752 sdata->u.mgd.status_fc = fc;
3753 sdata->u.mgd.status_acked = acked;
3754 sdata->u.mgd.status_received = true;
3755
3756 ieee80211_queue_work(&local->hw, &sdata->work);
3757 }
3758
3759 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3760 {
3761 struct ieee80211_local *local = sdata->local;
3762 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3763
3764 sdata_lock(sdata);
3765
3766 if (ifmgd->status_received) {
3767 __le16 fc = ifmgd->status_fc;
3768 bool status_acked = ifmgd->status_acked;
3769
3770 ifmgd->status_received = false;
3771 if (ifmgd->auth_data &&
3772 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3773 if (status_acked) {
3774 ifmgd->auth_data->timeout =
3775 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3776 run_again(sdata, ifmgd->auth_data->timeout);
3777 } else {
3778 ifmgd->auth_data->timeout = jiffies - 1;
3779 }
3780 ifmgd->auth_data->timeout_started = true;
3781 } else if (ifmgd->assoc_data &&
3782 (ieee80211_is_assoc_req(fc) ||
3783 ieee80211_is_reassoc_req(fc))) {
3784 if (status_acked) {
3785 ifmgd->assoc_data->timeout =
3786 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3787 run_again(sdata, ifmgd->assoc_data->timeout);
3788 } else {
3789 ifmgd->assoc_data->timeout = jiffies - 1;
3790 }
3791 ifmgd->assoc_data->timeout_started = true;
3792 }
3793 }
3794
3795 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3796 time_after(jiffies, ifmgd->auth_data->timeout)) {
3797 if (ifmgd->auth_data->done) {
3798 /*
3799 * ok ... we waited for assoc but userspace didn't,
3800 * so let's just kill the auth data
3801 */
3802 ieee80211_destroy_auth_data(sdata, false);
3803 } else if (ieee80211_probe_auth(sdata)) {
3804 u8 bssid[ETH_ALEN];
3805
3806 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3807
3808 ieee80211_destroy_auth_data(sdata, false);
3809
3810 cfg80211_auth_timeout(sdata->dev, bssid);
3811 }
3812 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3813 run_again(sdata, ifmgd->auth_data->timeout);
3814
3815 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3816 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3817 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3818 ieee80211_do_assoc(sdata)) {
3819 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3820
3821 ieee80211_destroy_assoc_data(sdata, false);
3822 cfg80211_assoc_timeout(sdata->dev, bss);
3823 }
3824 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3825 run_again(sdata, ifmgd->assoc_data->timeout);
3826
3827 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3828 ifmgd->associated) {
3829 u8 bssid[ETH_ALEN];
3830 int max_tries;
3831
3832 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3833
3834 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3835 max_tries = max_nullfunc_tries;
3836 else
3837 max_tries = max_probe_tries;
3838
3839 /* ACK received for nullfunc probing frame */
3840 if (!ifmgd->probe_send_count)
3841 ieee80211_reset_ap_probe(sdata);
3842 else if (ifmgd->nullfunc_failed) {
3843 if (ifmgd->probe_send_count < max_tries) {
3844 mlme_dbg(sdata,
3845 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3846 bssid, ifmgd->probe_send_count,
3847 max_tries);
3848 ieee80211_mgd_probe_ap_send(sdata);
3849 } else {
3850 mlme_dbg(sdata,
3851 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3852 bssid);
3853 ieee80211_sta_connection_lost(sdata, bssid,
3854 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3855 false);
3856 }
3857 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3858 run_again(sdata, ifmgd->probe_timeout);
3859 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3860 mlme_dbg(sdata,
3861 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3862 bssid, probe_wait_ms);
3863 ieee80211_sta_connection_lost(sdata, bssid,
3864 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3865 } else if (ifmgd->probe_send_count < max_tries) {
3866 mlme_dbg(sdata,
3867 "No probe response from AP %pM after %dms, try %d/%i\n",
3868 bssid, probe_wait_ms,
3869 ifmgd->probe_send_count, max_tries);
3870 ieee80211_mgd_probe_ap_send(sdata);
3871 } else {
3872 /*
3873 * We actually lost the connection ... or did we?
3874 * Let's make sure!
3875 */
3876 wiphy_debug(local->hw.wiphy,
3877 "%s: No probe response from AP %pM"
3878 " after %dms, disconnecting.\n",
3879 sdata->name,
3880 bssid, probe_wait_ms);
3881
3882 ieee80211_sta_connection_lost(sdata, bssid,
3883 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3884 }
3885 }
3886
3887 sdata_unlock(sdata);
3888 }
3889
3890 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3891 {
3892 struct ieee80211_sub_if_data *sdata =
3893 (struct ieee80211_sub_if_data *) data;
3894 struct ieee80211_local *local = sdata->local;
3895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3896
3897 if (local->quiescing)
3898 return;
3899
3900 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3901 return;
3902
3903 sdata->u.mgd.connection_loss = false;
3904 ieee80211_queue_work(&sdata->local->hw,
3905 &sdata->u.mgd.beacon_connection_loss_work);
3906 }
3907
3908 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3909 {
3910 struct ieee80211_sub_if_data *sdata =
3911 (struct ieee80211_sub_if_data *) data;
3912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3913 struct ieee80211_local *local = sdata->local;
3914
3915 if (local->quiescing)
3916 return;
3917
3918 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
3919 return;
3920
3921 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3922 }
3923
3924 static void ieee80211_sta_monitor_work(struct work_struct *work)
3925 {
3926 struct ieee80211_sub_if_data *sdata =
3927 container_of(work, struct ieee80211_sub_if_data,
3928 u.mgd.monitor_work);
3929
3930 ieee80211_mgd_probe_ap(sdata, false);
3931 }
3932
3933 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3934 {
3935 u32 flags;
3936
3937 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3938 __ieee80211_stop_poll(sdata);
3939
3940 /* let's probe the connection once */
3941 flags = sdata->local->hw.flags;
3942 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3943 ieee80211_queue_work(&sdata->local->hw,
3944 &sdata->u.mgd.monitor_work);
3945 /* and do all the other regular work too */
3946 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3947 }
3948 }
3949
3950 #ifdef CONFIG_PM
3951 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3952 {
3953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3954 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3955
3956 sdata_lock(sdata);
3957
3958 if (ifmgd->auth_data || ifmgd->assoc_data) {
3959 const u8 *bssid = ifmgd->auth_data ?
3960 ifmgd->auth_data->bss->bssid :
3961 ifmgd->assoc_data->bss->bssid;
3962
3963 /*
3964 * If we are trying to authenticate / associate while suspending,
3965 * cfg80211 won't know and won't actually abort those attempts,
3966 * thus we need to do that ourselves.
3967 */
3968 ieee80211_send_deauth_disassoc(sdata, bssid,
3969 IEEE80211_STYPE_DEAUTH,
3970 WLAN_REASON_DEAUTH_LEAVING,
3971 false, frame_buf);
3972 if (ifmgd->assoc_data)
3973 ieee80211_destroy_assoc_data(sdata, false);
3974 if (ifmgd->auth_data)
3975 ieee80211_destroy_auth_data(sdata, false);
3976 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3977 IEEE80211_DEAUTH_FRAME_LEN);
3978 }
3979
3980 sdata_unlock(sdata);
3981 }
3982
3983 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3984 {
3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3986
3987 sdata_lock(sdata);
3988 if (!ifmgd->associated) {
3989 sdata_unlock(sdata);
3990 return;
3991 }
3992
3993 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3994 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3995 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3996 ieee80211_sta_connection_lost(sdata,
3997 ifmgd->associated->bssid,
3998 WLAN_REASON_UNSPECIFIED,
3999 true);
4000 sdata_unlock(sdata);
4001 return;
4002 }
4003 sdata_unlock(sdata);
4004 }
4005 #endif
4006
4007 /* interface setup */
4008 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
4009 {
4010 struct ieee80211_if_managed *ifmgd;
4011
4012 ifmgd = &sdata->u.mgd;
4013 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
4014 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
4015 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4016 ieee80211_beacon_connection_loss_work);
4017 INIT_WORK(&ifmgd->csa_connection_drop_work,
4018 ieee80211_csa_connection_drop_work);
4019 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
4020 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4021 ieee80211_tdls_peer_del_work);
4022 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
4023 (unsigned long) sdata);
4024 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4025 (unsigned long) sdata);
4026 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4027 (unsigned long) sdata);
4028 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
4029 (unsigned long) sdata);
4030 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4031 ieee80211_sta_handle_tspec_ac_params_wk);
4032
4033 ifmgd->flags = 0;
4034 ifmgd->powersave = sdata->wdev.ps;
4035 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4036 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
4037 ifmgd->p2p_noa_index = -1;
4038
4039 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
4040 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4041 else
4042 ifmgd->req_smps = IEEE80211_SMPS_OFF;
4043
4044 /* Setup TDLS data */
4045 spin_lock_init(&ifmgd->teardown_lock);
4046 ifmgd->teardown_skb = NULL;
4047 ifmgd->orig_teardown_skb = NULL;
4048 }
4049
4050 /* scan finished notification */
4051 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
4052 {
4053 struct ieee80211_sub_if_data *sdata;
4054
4055 /* Restart STA timers */
4056 rcu_read_lock();
4057 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4058 if (ieee80211_sdata_running(sdata))
4059 ieee80211_restart_sta_timer(sdata);
4060 }
4061 rcu_read_unlock();
4062 }
4063
4064 int ieee80211_max_network_latency(struct notifier_block *nb,
4065 unsigned long data, void *dummy)
4066 {
4067 s32 latency_usec = (s32) data;
4068 struct ieee80211_local *local =
4069 container_of(nb, struct ieee80211_local,
4070 network_latency_notifier);
4071
4072 mutex_lock(&local->iflist_mtx);
4073 ieee80211_recalc_ps(local, latency_usec);
4074 mutex_unlock(&local->iflist_mtx);
4075
4076 return NOTIFY_OK;
4077 }
4078
4079 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4080 struct cfg80211_bss *cbss)
4081 {
4082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4083 const u8 *ht_cap_ie, *vht_cap_ie;
4084 const struct ieee80211_ht_cap *ht_cap;
4085 const struct ieee80211_vht_cap *vht_cap;
4086 u8 chains = 1;
4087
4088 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4089 return chains;
4090
4091 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4092 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4093 ht_cap = (void *)(ht_cap_ie + 2);
4094 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4095 /*
4096 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4097 * "Tx Unequal Modulation Supported" fields.
4098 */
4099 }
4100
4101 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4102 return chains;
4103
4104 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4105 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4106 u8 nss;
4107 u16 tx_mcs_map;
4108
4109 vht_cap = (void *)(vht_cap_ie + 2);
4110 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4111 for (nss = 8; nss > 0; nss--) {
4112 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4113 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4114 break;
4115 }
4116 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4117 chains = max(chains, nss);
4118 }
4119
4120 return chains;
4121 }
4122
4123 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4124 struct cfg80211_bss *cbss)
4125 {
4126 struct ieee80211_local *local = sdata->local;
4127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4128 const struct ieee80211_ht_cap *ht_cap = NULL;
4129 const struct ieee80211_ht_operation *ht_oper = NULL;
4130 const struct ieee80211_vht_operation *vht_oper = NULL;
4131 struct ieee80211_supported_band *sband;
4132 struct cfg80211_chan_def chandef;
4133 int ret;
4134
4135 sband = local->hw.wiphy->bands[cbss->channel->band];
4136
4137 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4138 IEEE80211_STA_DISABLE_80P80MHZ |
4139 IEEE80211_STA_DISABLE_160MHZ);
4140
4141 rcu_read_lock();
4142
4143 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4144 sband->ht_cap.ht_supported) {
4145 const u8 *ht_oper_ie, *ht_cap_ie;
4146
4147 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
4148 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4149 ht_oper = (void *)(ht_oper_ie + 2);
4150
4151 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4152 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4153 ht_cap = (void *)(ht_cap_ie + 2);
4154
4155 if (!ht_cap) {
4156 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4157 ht_oper = NULL;
4158 }
4159 }
4160
4161 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4162 sband->vht_cap.vht_supported) {
4163 const u8 *vht_oper_ie, *vht_cap;
4164
4165 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4166 WLAN_EID_VHT_OPERATION);
4167 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4168 vht_oper = (void *)(vht_oper_ie + 2);
4169 if (vht_oper && !ht_oper) {
4170 vht_oper = NULL;
4171 sdata_info(sdata,
4172 "AP advertised VHT without HT, disabling both\n");
4173 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4174 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4175 }
4176
4177 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4178 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4179 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4180 vht_oper = NULL;
4181 }
4182 }
4183
4184 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4185 cbss->channel,
4186 ht_cap, ht_oper, vht_oper,
4187 &chandef, false);
4188
4189 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4190 local->rx_chains);
4191
4192 rcu_read_unlock();
4193
4194 /* will change later if needed */
4195 sdata->smps_mode = IEEE80211_SMPS_OFF;
4196
4197 mutex_lock(&local->mtx);
4198 /*
4199 * If this fails (possibly due to channel context sharing
4200 * on incompatible channels, e.g. 80+80 and 160 sharing the
4201 * same control channel) try to use a smaller bandwidth.
4202 */
4203 ret = ieee80211_vif_use_channel(sdata, &chandef,
4204 IEEE80211_CHANCTX_SHARED);
4205
4206 /* don't downgrade for 5 and 10 MHz channels, though. */
4207 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4208 chandef.width == NL80211_CHAN_WIDTH_10)
4209 goto out;
4210
4211 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4212 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
4213 ret = ieee80211_vif_use_channel(sdata, &chandef,
4214 IEEE80211_CHANCTX_SHARED);
4215 }
4216 out:
4217 mutex_unlock(&local->mtx);
4218 return ret;
4219 }
4220
4221 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4222 struct cfg80211_bss *cbss, bool assoc)
4223 {
4224 struct ieee80211_local *local = sdata->local;
4225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4226 struct ieee80211_bss *bss = (void *)cbss->priv;
4227 struct sta_info *new_sta = NULL;
4228 struct ieee80211_supported_band *sband;
4229 struct ieee80211_sta_ht_cap sta_ht_cap;
4230 bool have_sta = false, is_override = false;
4231 int err;
4232
4233 sband = local->hw.wiphy->bands[cbss->channel->band];
4234
4235 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4236 return -EINVAL;
4237
4238 if (assoc) {
4239 rcu_read_lock();
4240 have_sta = sta_info_get(sdata, cbss->bssid);
4241 rcu_read_unlock();
4242 }
4243
4244 if (!have_sta) {
4245 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4246 if (!new_sta)
4247 return -ENOMEM;
4248 }
4249
4250 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4251 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4252
4253 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4254 (sband->ht_cap.cap &
4255 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4256
4257 if (new_sta || is_override) {
4258 err = ieee80211_prep_channel(sdata, cbss);
4259 if (err) {
4260 if (new_sta)
4261 sta_info_free(local, new_sta);
4262 return -EINVAL;
4263 }
4264 }
4265
4266 if (new_sta) {
4267 u32 rates = 0, basic_rates = 0;
4268 bool have_higher_than_11mbit;
4269 int min_rate = INT_MAX, min_rate_index = -1;
4270 struct ieee80211_chanctx_conf *chanctx_conf;
4271 const struct cfg80211_bss_ies *ies;
4272 int shift = ieee80211_vif_get_shift(&sdata->vif);
4273 u32 rate_flags;
4274
4275 rcu_read_lock();
4276 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4277 if (WARN_ON(!chanctx_conf)) {
4278 rcu_read_unlock();
4279 sta_info_free(local, new_sta);
4280 return -EINVAL;
4281 }
4282 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4283 rcu_read_unlock();
4284
4285 ieee80211_get_rates(sband, bss->supp_rates,
4286 bss->supp_rates_len,
4287 &rates, &basic_rates,
4288 &have_higher_than_11mbit,
4289 &min_rate, &min_rate_index,
4290 shift, rate_flags);
4291
4292 /*
4293 * This used to be a workaround for basic rates missing
4294 * in the association response frame. Now that we no
4295 * longer use the basic rates from there, it probably
4296 * doesn't happen any more, but keep the workaround so
4297 * in case some *other* APs are buggy in different ways
4298 * we can connect -- with a warning.
4299 */
4300 if (!basic_rates && min_rate_index >= 0) {
4301 sdata_info(sdata,
4302 "No basic rates, using min rate instead\n");
4303 basic_rates = BIT(min_rate_index);
4304 }
4305
4306 new_sta->sta.supp_rates[cbss->channel->band] = rates;
4307 sdata->vif.bss_conf.basic_rates = basic_rates;
4308
4309 /* cf. IEEE 802.11 9.2.12 */
4310 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
4311 have_higher_than_11mbit)
4312 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4313 else
4314 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4315
4316 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4317
4318 /* set timing information */
4319 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
4320 rcu_read_lock();
4321 ies = rcu_dereference(cbss->beacon_ies);
4322 if (ies) {
4323 const u8 *tim_ie;
4324
4325 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4326 sdata->vif.bss_conf.sync_device_ts =
4327 bss->device_ts_beacon;
4328 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4329 ies->data, ies->len);
4330 if (tim_ie && tim_ie[1] >= 2)
4331 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4332 else
4333 sdata->vif.bss_conf.sync_dtim_count = 0;
4334 } else if (!(local->hw.flags &
4335 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4336 ies = rcu_dereference(cbss->proberesp_ies);
4337 /* must be non-NULL since beacon IEs were NULL */
4338 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4339 sdata->vif.bss_conf.sync_device_ts =
4340 bss->device_ts_presp;
4341 sdata->vif.bss_conf.sync_dtim_count = 0;
4342 } else {
4343 sdata->vif.bss_conf.sync_tsf = 0;
4344 sdata->vif.bss_conf.sync_device_ts = 0;
4345 sdata->vif.bss_conf.sync_dtim_count = 0;
4346 }
4347 rcu_read_unlock();
4348
4349 /* tell driver about BSSID, basic rates and timing */
4350 ieee80211_bss_info_change_notify(sdata,
4351 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4352 BSS_CHANGED_BEACON_INT);
4353
4354 if (assoc)
4355 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4356
4357 err = sta_info_insert(new_sta);
4358 new_sta = NULL;
4359 if (err) {
4360 sdata_info(sdata,
4361 "failed to insert STA entry for the AP (error %d)\n",
4362 err);
4363 return err;
4364 }
4365 } else
4366 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4367
4368 return 0;
4369 }
4370
4371 /* config hooks */
4372 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4373 struct cfg80211_auth_request *req)
4374 {
4375 struct ieee80211_local *local = sdata->local;
4376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4377 struct ieee80211_mgd_auth_data *auth_data;
4378 u16 auth_alg;
4379 int err;
4380
4381 /* prepare auth data structure */
4382
4383 switch (req->auth_type) {
4384 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4385 auth_alg = WLAN_AUTH_OPEN;
4386 break;
4387 case NL80211_AUTHTYPE_SHARED_KEY:
4388 if (IS_ERR(local->wep_tx_tfm))
4389 return -EOPNOTSUPP;
4390 auth_alg = WLAN_AUTH_SHARED_KEY;
4391 break;
4392 case NL80211_AUTHTYPE_FT:
4393 auth_alg = WLAN_AUTH_FT;
4394 break;
4395 case NL80211_AUTHTYPE_NETWORK_EAP:
4396 auth_alg = WLAN_AUTH_LEAP;
4397 break;
4398 case NL80211_AUTHTYPE_SAE:
4399 auth_alg = WLAN_AUTH_SAE;
4400 break;
4401 default:
4402 return -EOPNOTSUPP;
4403 }
4404
4405 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4406 req->ie_len, GFP_KERNEL);
4407 if (!auth_data)
4408 return -ENOMEM;
4409
4410 auth_data->bss = req->bss;
4411
4412 if (req->sae_data_len >= 4) {
4413 __le16 *pos = (__le16 *) req->sae_data;
4414 auth_data->sae_trans = le16_to_cpu(pos[0]);
4415 auth_data->sae_status = le16_to_cpu(pos[1]);
4416 memcpy(auth_data->data, req->sae_data + 4,
4417 req->sae_data_len - 4);
4418 auth_data->data_len += req->sae_data_len - 4;
4419 }
4420
4421 if (req->ie && req->ie_len) {
4422 memcpy(&auth_data->data[auth_data->data_len],
4423 req->ie, req->ie_len);
4424 auth_data->data_len += req->ie_len;
4425 }
4426
4427 if (req->key && req->key_len) {
4428 auth_data->key_len = req->key_len;
4429 auth_data->key_idx = req->key_idx;
4430 memcpy(auth_data->key, req->key, req->key_len);
4431 }
4432
4433 auth_data->algorithm = auth_alg;
4434
4435 /* try to authenticate/probe */
4436
4437 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4438 ifmgd->assoc_data) {
4439 err = -EBUSY;
4440 goto err_free;
4441 }
4442
4443 if (ifmgd->auth_data)
4444 ieee80211_destroy_auth_data(sdata, false);
4445
4446 /* prep auth_data so we don't go into idle on disassoc */
4447 ifmgd->auth_data = auth_data;
4448
4449 if (ifmgd->associated) {
4450 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4451
4452 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4453 WLAN_REASON_UNSPECIFIED,
4454 false, frame_buf);
4455
4456 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4457 sizeof(frame_buf));
4458 }
4459
4460 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4461
4462 err = ieee80211_prep_connection(sdata, req->bss, false);
4463 if (err)
4464 goto err_clear;
4465
4466 err = ieee80211_probe_auth(sdata);
4467 if (err) {
4468 sta_info_destroy_addr(sdata, req->bss->bssid);
4469 goto err_clear;
4470 }
4471
4472 /* hold our own reference */
4473 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4474 return 0;
4475
4476 err_clear:
4477 memset(ifmgd->bssid, 0, ETH_ALEN);
4478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4479 ifmgd->auth_data = NULL;
4480 err_free:
4481 kfree(auth_data);
4482 return err;
4483 }
4484
4485 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4486 const u8 *wmm_param, int len)
4487 {
4488 const u8 *pos;
4489 size_t left;
4490
4491 if (len < 8)
4492 return false;
4493
4494 if (wmm_param[5] != 1 /* version */)
4495 return false;
4496
4497 pos = wmm_param + 8;
4498 left = len - 8;
4499
4500 for (; left >= 4; left -= 4, pos += 4) {
4501 u8 aifsn = pos[0] & 0x0f;
4502 u8 ecwmin = pos[1] & 0x0f;
4503 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4504 int aci = (pos[0] >> 5) & 0x03;
4505
4506 if (aifsn < 2) {
4507 sdata_info(sdata,
4508 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4509 aifsn, aci);
4510 return false;
4511 }
4512 if (ecwmin > ecwmax) {
4513 sdata_info(sdata,
4514 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4515 ecwmin, ecwmax, aci);
4516 return false;
4517 }
4518 }
4519
4520 return true;
4521 }
4522
4523 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4524 struct cfg80211_assoc_request *req)
4525 {
4526 struct ieee80211_local *local = sdata->local;
4527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4528 struct ieee80211_bss *bss = (void *)req->bss->priv;
4529 struct ieee80211_mgd_assoc_data *assoc_data;
4530 const struct cfg80211_bss_ies *beacon_ies;
4531 struct ieee80211_supported_band *sband;
4532 const u8 *ssidie, *ht_ie, *vht_ie;
4533 int i, err;
4534
4535 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4536 if (!assoc_data)
4537 return -ENOMEM;
4538
4539 rcu_read_lock();
4540 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4541 if (!ssidie) {
4542 rcu_read_unlock();
4543 kfree(assoc_data);
4544 return -EINVAL;
4545 }
4546 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4547 assoc_data->ssid_len = ssidie[1];
4548 rcu_read_unlock();
4549
4550 if (ifmgd->associated) {
4551 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4552
4553 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4554 WLAN_REASON_UNSPECIFIED,
4555 false, frame_buf);
4556
4557 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4558 sizeof(frame_buf));
4559 }
4560
4561 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4562 err = -EBUSY;
4563 goto err_free;
4564 }
4565
4566 if (ifmgd->assoc_data) {
4567 err = -EBUSY;
4568 goto err_free;
4569 }
4570
4571 if (ifmgd->auth_data) {
4572 bool match;
4573
4574 /* keep sta info, bssid if matching */
4575 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4576 ieee80211_destroy_auth_data(sdata, match);
4577 }
4578
4579 /* prepare assoc data */
4580
4581 ifmgd->beacon_crc_valid = false;
4582
4583 assoc_data->wmm = bss->wmm_used &&
4584 (local->hw.queues >= IEEE80211_NUM_ACS);
4585 if (assoc_data->wmm) {
4586 /* try to check validity of WMM params IE */
4587 const struct cfg80211_bss_ies *ies;
4588 const u8 *wp, *start, *end;
4589
4590 rcu_read_lock();
4591 ies = rcu_dereference(req->bss->ies);
4592 start = ies->data;
4593 end = start + ies->len;
4594
4595 while (true) {
4596 wp = cfg80211_find_vendor_ie(
4597 WLAN_OUI_MICROSOFT,
4598 WLAN_OUI_TYPE_MICROSOFT_WMM,
4599 start, end - start);
4600 if (!wp)
4601 break;
4602 start = wp + wp[1] + 2;
4603 /* if this IE is too short, try the next */
4604 if (wp[1] <= 4)
4605 continue;
4606 /* if this IE is WMM params, we found what we wanted */
4607 if (wp[6] == 1)
4608 break;
4609 }
4610
4611 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4612 wp[1] - 2)) {
4613 assoc_data->wmm = false;
4614 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4615 }
4616 rcu_read_unlock();
4617 }
4618
4619 /*
4620 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4621 * We still associate in non-HT mode (11a/b/g) if any one of these
4622 * ciphers is configured as pairwise.
4623 * We can set this to true for non-11n hardware, that'll be checked
4624 * separately along with the peer capabilities.
4625 */
4626 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4627 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4628 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4629 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4630 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4631 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4632 netdev_info(sdata->dev,
4633 "disabling HT/VHT due to WEP/TKIP use\n");
4634 }
4635 }
4636
4637 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4638 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4639 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4640 }
4641
4642 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4643 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4644
4645 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4646 sband = local->hw.wiphy->bands[req->bss->channel->band];
4647 if (!sband->ht_cap.ht_supported ||
4648 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4649 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4650 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4651 if (!bss->wmm_used &&
4652 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4653 netdev_info(sdata->dev,
4654 "disabling HT as WMM/QoS is not supported by the AP\n");
4655 }
4656
4657 /* disable VHT if we don't support it or the AP doesn't use WMM */
4658 if (!sband->vht_cap.vht_supported ||
4659 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4660 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4661 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4662 if (!bss->wmm_used &&
4663 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4664 netdev_info(sdata->dev,
4665 "disabling VHT as WMM/QoS is not supported by the AP\n");
4666 }
4667
4668 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4669 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4670 sizeof(ifmgd->ht_capa_mask));
4671
4672 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4673 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4674 sizeof(ifmgd->vht_capa_mask));
4675
4676 if (req->ie && req->ie_len) {
4677 memcpy(assoc_data->ie, req->ie, req->ie_len);
4678 assoc_data->ie_len = req->ie_len;
4679 }
4680
4681 assoc_data->bss = req->bss;
4682
4683 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4684 if (ifmgd->powersave)
4685 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4686 else
4687 sdata->smps_mode = IEEE80211_SMPS_OFF;
4688 } else
4689 sdata->smps_mode = ifmgd->req_smps;
4690
4691 assoc_data->capability = req->bss->capability;
4692 assoc_data->supp_rates = bss->supp_rates;
4693 assoc_data->supp_rates_len = bss->supp_rates_len;
4694
4695 rcu_read_lock();
4696 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4697 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4698 assoc_data->ap_ht_param =
4699 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4700 else
4701 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4702 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4703 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4704 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4705 sizeof(struct ieee80211_vht_cap));
4706 else
4707 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4708 rcu_read_unlock();
4709
4710 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4711 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4712 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4713 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4714
4715 if (bss->wmm_used && bss->uapsd_supported &&
4716 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
4717 assoc_data->uapsd = true;
4718 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4719 } else {
4720 assoc_data->uapsd = false;
4721 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4722 }
4723
4724 if (req->prev_bssid)
4725 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4726
4727 if (req->use_mfp) {
4728 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4729 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4730 } else {
4731 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4732 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4733 }
4734
4735 if (req->flags & ASSOC_REQ_USE_RRM)
4736 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4737 else
4738 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4739
4740 if (req->crypto.control_port)
4741 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4742 else
4743 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4744
4745 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4746 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4747 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4748 sdata->vif.type);
4749
4750 /* kick off associate process */
4751
4752 ifmgd->assoc_data = assoc_data;
4753 ifmgd->dtim_period = 0;
4754 ifmgd->have_beacon = false;
4755
4756 err = ieee80211_prep_connection(sdata, req->bss, true);
4757 if (err)
4758 goto err_clear;
4759
4760 rcu_read_lock();
4761 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4762
4763 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4764 !beacon_ies) {
4765 /*
4766 * Wait up to one beacon interval ...
4767 * should this be more if we miss one?
4768 */
4769 sdata_info(sdata, "waiting for beacon from %pM\n",
4770 ifmgd->bssid);
4771 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4772 assoc_data->timeout_started = true;
4773 assoc_data->need_beacon = true;
4774 } else if (beacon_ies) {
4775 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4776 beacon_ies->data,
4777 beacon_ies->len);
4778 u8 dtim_count = 0;
4779
4780 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4781 const struct ieee80211_tim_ie *tim;
4782 tim = (void *)(tim_ie + 2);
4783 ifmgd->dtim_period = tim->dtim_period;
4784 dtim_count = tim->dtim_count;
4785 }
4786 ifmgd->have_beacon = true;
4787 assoc_data->timeout = jiffies;
4788 assoc_data->timeout_started = true;
4789
4790 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4791 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4792 sdata->vif.bss_conf.sync_device_ts =
4793 bss->device_ts_beacon;
4794 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4795 }
4796 } else {
4797 assoc_data->timeout = jiffies;
4798 assoc_data->timeout_started = true;
4799 }
4800 rcu_read_unlock();
4801
4802 run_again(sdata, assoc_data->timeout);
4803
4804 if (bss->corrupt_data) {
4805 char *corrupt_type = "data";
4806 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4807 if (bss->corrupt_data &
4808 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4809 corrupt_type = "beacon and probe response";
4810 else
4811 corrupt_type = "beacon";
4812 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4813 corrupt_type = "probe response";
4814 sdata_info(sdata, "associating with AP with corrupt %s\n",
4815 corrupt_type);
4816 }
4817
4818 return 0;
4819 err_clear:
4820 memset(ifmgd->bssid, 0, ETH_ALEN);
4821 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4822 ifmgd->assoc_data = NULL;
4823 err_free:
4824 kfree(assoc_data);
4825 return err;
4826 }
4827
4828 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4829 struct cfg80211_deauth_request *req)
4830 {
4831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4832 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4833 bool tx = !req->local_state_change;
4834
4835 if (ifmgd->auth_data &&
4836 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4837 sdata_info(sdata,
4838 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4839 req->bssid, req->reason_code,
4840 ieee80211_get_reason_code_string(req->reason_code));
4841
4842 drv_mgd_prepare_tx(sdata->local, sdata);
4843 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4844 IEEE80211_STYPE_DEAUTH,
4845 req->reason_code, tx,
4846 frame_buf);
4847 ieee80211_destroy_auth_data(sdata, false);
4848 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4849 IEEE80211_DEAUTH_FRAME_LEN);
4850
4851 return 0;
4852 }
4853
4854 if (ifmgd->associated &&
4855 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4856 sdata_info(sdata,
4857 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4858 req->bssid, req->reason_code,
4859 ieee80211_get_reason_code_string(req->reason_code));
4860
4861 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4862 req->reason_code, tx, frame_buf);
4863 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4864 IEEE80211_DEAUTH_FRAME_LEN);
4865 return 0;
4866 }
4867
4868 return -ENOTCONN;
4869 }
4870
4871 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4872 struct cfg80211_disassoc_request *req)
4873 {
4874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4875 u8 bssid[ETH_ALEN];
4876 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4877
4878 /*
4879 * cfg80211 should catch this ... but it's racy since
4880 * we can receive a disassoc frame, process it, hand it
4881 * to cfg80211 while that's in a locked section already
4882 * trying to tell us that the user wants to disconnect.
4883 */
4884 if (ifmgd->associated != req->bss)
4885 return -ENOLINK;
4886
4887 sdata_info(sdata,
4888 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4889 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4890
4891 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4892 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4893 req->reason_code, !req->local_state_change,
4894 frame_buf);
4895
4896 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4897 IEEE80211_DEAUTH_FRAME_LEN);
4898
4899 return 0;
4900 }
4901
4902 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4903 {
4904 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4905
4906 /*
4907 * Make sure some work items will not run after this,
4908 * they will not do anything but might not have been
4909 * cancelled when disconnecting.
4910 */
4911 cancel_work_sync(&ifmgd->monitor_work);
4912 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4913 cancel_work_sync(&ifmgd->request_smps_work);
4914 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4915 cancel_work_sync(&ifmgd->chswitch_work);
4916 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
4917
4918 sdata_lock(sdata);
4919 if (ifmgd->assoc_data) {
4920 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4921 ieee80211_destroy_assoc_data(sdata, false);
4922 cfg80211_assoc_timeout(sdata->dev, bss);
4923 }
4924 if (ifmgd->auth_data)
4925 ieee80211_destroy_auth_data(sdata, false);
4926 spin_lock_bh(&ifmgd->teardown_lock);
4927 if (ifmgd->teardown_skb) {
4928 kfree_skb(ifmgd->teardown_skb);
4929 ifmgd->teardown_skb = NULL;
4930 ifmgd->orig_teardown_skb = NULL;
4931 }
4932 spin_unlock_bh(&ifmgd->teardown_lock);
4933 del_timer_sync(&ifmgd->timer);
4934 sdata_unlock(sdata);
4935 }
4936
4937 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4938 enum nl80211_cqm_rssi_threshold_event rssi_event,
4939 gfp_t gfp)
4940 {
4941 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4942
4943 trace_api_cqm_rssi_notify(sdata, rssi_event);
4944
4945 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4946 }
4947 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
4948
4949 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4950 {
4951 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4952
4953 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4954
4955 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4956 }
4957 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
This page took 0.14088 seconds and 5 git commands to generate.