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mac80211: add TDLS QoS param IE on setup-confirm
[mirror_ubuntu-zesty-kernel.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 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
40 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41 #define IEEE80211_ASSOC_MAX_TRIES 3
42
43 static int max_nullfunc_tries = 2;
44 module_param(max_nullfunc_tries, int, 0644);
45 MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48 static int max_probe_tries = 5;
49 module_param(max_probe_tries, int, 0644);
50 MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
52
53 /*
54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
60 */
61 static int beacon_loss_count = 7;
62 module_param(beacon_loss_count, int, 0644);
63 MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
65
66 /*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
70 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
71 /*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
76 static int probe_wait_ms = 500;
77 module_param(probe_wait_ms, int, 0644);
78 MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
81
82 /*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
89 /*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
95 /*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
105 static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
107 {
108 sdata_assert_lock(sdata);
109
110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
113 }
114
115 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
116 {
117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
118 return;
119
120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
125 }
126
127 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128 {
129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
134 ifmgd->probe_send_count = 0;
135
136 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
137 return;
138
139 mod_timer(&sdata->u.mgd.conn_mon_timer,
140 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
141 }
142
143 static int ecw2cw(int ecw)
144 {
145 return (1 << ecw) - 1;
146 }
147
148 static u32
149 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
154 struct cfg80211_chan_def *chandef, bool tracking)
155 {
156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157 struct cfg80211_chan_def vht_chandef;
158 u32 ht_cfreq, ret;
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
175 if (!tracking && channel->center_freq != ht_cfreq) {
176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
197 break;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
201 break;
202 }
203 } else {
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
208 goto out;
209 }
210
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
219 channel->band);
220 vht_chandef.center_freq2 = 0;
221
222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 vht_chandef.center_freq1 = chandef->center_freq1;
226 break;
227 case IEEE80211_VHT_CHANWIDTH_80MHZ:
228 vht_chandef.width = NL80211_CHAN_WIDTH_80;
229 break;
230 case IEEE80211_VHT_CHANWIDTH_160MHZ:
231 vht_chandef.width = NL80211_CHAN_WIDTH_160;
232 break;
233 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
235 vht_chandef.center_freq2 =
236 ieee80211_channel_to_frequency(
237 vht_oper->center_freq_seg2_idx,
238 channel->band);
239 break;
240 default:
241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
242 sdata_info(sdata,
243 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
244 vht_oper->chan_width);
245 ret = IEEE80211_STA_DISABLE_VHT;
246 goto out;
247 }
248
249 if (!cfg80211_chandef_valid(&vht_chandef)) {
250 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
251 sdata_info(sdata,
252 "AP VHT information is invalid, disable VHT\n");
253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
258 ret = 0;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
264 sdata_info(sdata,
265 "AP VHT information doesn't match HT, disable VHT\n");
266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 *chandef = vht_chandef;
271
272 ret = 0;
273
274 out:
275 /*
276 * When tracking the current AP, don't do any further checks if the
277 * new chandef is identical to the one we're currently using for the
278 * connection. This keeps us from playing ping-pong with regulatory,
279 * without it the following can happen (for example):
280 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
281 * - AP advertises regdom US
282 * - CRDA loads regdom US with 80 MHz prohibited (old database)
283 * - the code below detects an unsupported channel, downgrades, and
284 * we disconnect from the AP in the caller
285 * - disconnect causes CRDA to reload world regdomain and the game
286 * starts anew.
287 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
288 *
289 * It seems possible that there are still scenarios with CSA or real
290 * bandwidth changes where a this could happen, but those cases are
291 * less common and wouldn't completely prevent using the AP.
292 */
293 if (tracking &&
294 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
295 return ret;
296
297 /* don't print the message below for VHT mismatch if VHT is disabled */
298 if (ret & IEEE80211_STA_DISABLE_VHT)
299 vht_chandef = *chandef;
300
301 /*
302 * Ignore the DISABLED flag when we're already connected and only
303 * tracking the APs beacon for bandwidth changes - otherwise we
304 * might get disconnected here if we connect to an AP, update our
305 * regulatory information based on the AP's country IE and the
306 * information we have is wrong/outdated and disables the channel
307 * that we're actually using for the connection to the AP.
308 */
309 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
310 tracking ? 0 :
311 IEEE80211_CHAN_DISABLED)) {
312 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
313 ret = IEEE80211_STA_DISABLE_HT |
314 IEEE80211_STA_DISABLE_VHT;
315 break;
316 }
317
318 ret |= ieee80211_chandef_downgrade(chandef);
319 }
320
321 if (chandef->width != vht_chandef.width && !tracking)
322 sdata_info(sdata,
323 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
324
325 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
326 return ret;
327 }
328
329 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
330 struct sta_info *sta,
331 const struct ieee80211_ht_operation *ht_oper,
332 const struct ieee80211_vht_operation *vht_oper,
333 const u8 *bssid, u32 *changed)
334 {
335 struct ieee80211_local *local = sdata->local;
336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
337 struct ieee80211_supported_band *sband;
338 struct ieee80211_channel *chan;
339 struct cfg80211_chan_def chandef;
340 u16 ht_opmode;
341 u32 flags;
342 enum ieee80211_sta_rx_bandwidth new_sta_bw;
343 int ret;
344
345 /* if HT was/is disabled, don't track any bandwidth changes */
346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
347 return 0;
348
349 /* don't check VHT if we associated as non-VHT station */
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
351 vht_oper = NULL;
352
353 if (WARN_ON_ONCE(!sta))
354 return -EINVAL;
355
356 /*
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
359 */
360 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
362 *changed |= BSS_CHANGED_HT;
363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
364 }
365
366 chan = sdata->vif.bss_conf.chandef.chan;
367 sband = local->hw.wiphy->bands[chan->band];
368
369 /* calculate new channel (type) based on HT/VHT operation IEs */
370 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
371 vht_oper, &chandef, true);
372
373 /*
374 * Downgrade the new channel if we associated with restricted
375 * capabilities. For example, if we associated as a 20 MHz STA
376 * to a 40 MHz AP (due to regulatory, capabilities or config
377 * reasons) then switching to a 40 MHz channel now won't do us
378 * any good -- we couldn't use it with the AP.
379 */
380 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
381 chandef.width == NL80211_CHAN_WIDTH_80P80)
382 flags |= ieee80211_chandef_downgrade(&chandef);
383 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
384 chandef.width == NL80211_CHAN_WIDTH_160)
385 flags |= ieee80211_chandef_downgrade(&chandef);
386 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
387 chandef.width > NL80211_CHAN_WIDTH_20)
388 flags |= ieee80211_chandef_downgrade(&chandef);
389
390 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
391 return 0;
392
393 sdata_info(sdata,
394 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
395 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
396 chandef.center_freq1, chandef.center_freq2);
397
398 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
399 IEEE80211_STA_DISABLE_VHT |
400 IEEE80211_STA_DISABLE_40MHZ |
401 IEEE80211_STA_DISABLE_80P80MHZ |
402 IEEE80211_STA_DISABLE_160MHZ)) ||
403 !cfg80211_chandef_valid(&chandef)) {
404 sdata_info(sdata,
405 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
406 ifmgd->bssid);
407 return -EINVAL;
408 }
409
410 switch (chandef.width) {
411 case NL80211_CHAN_WIDTH_20_NOHT:
412 case NL80211_CHAN_WIDTH_20:
413 new_sta_bw = IEEE80211_STA_RX_BW_20;
414 break;
415 case NL80211_CHAN_WIDTH_40:
416 new_sta_bw = IEEE80211_STA_RX_BW_40;
417 break;
418 case NL80211_CHAN_WIDTH_80:
419 new_sta_bw = IEEE80211_STA_RX_BW_80;
420 break;
421 case NL80211_CHAN_WIDTH_80P80:
422 case NL80211_CHAN_WIDTH_160:
423 new_sta_bw = IEEE80211_STA_RX_BW_160;
424 break;
425 default:
426 return -EINVAL;
427 }
428
429 if (new_sta_bw > sta->cur_max_bandwidth)
430 new_sta_bw = sta->cur_max_bandwidth;
431
432 if (new_sta_bw < sta->sta.bandwidth) {
433 sta->sta.bandwidth = new_sta_bw;
434 rate_control_rate_update(local, sband, sta,
435 IEEE80211_RC_BW_CHANGED);
436 }
437
438 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
439 if (ret) {
440 sdata_info(sdata,
441 "AP %pM changed bandwidth to incompatible one - disconnect\n",
442 ifmgd->bssid);
443 return ret;
444 }
445
446 if (new_sta_bw > sta->sta.bandwidth) {
447 sta->sta.bandwidth = new_sta_bw;
448 rate_control_rate_update(local, sband, sta,
449 IEEE80211_RC_BW_CHANGED);
450 }
451
452 return 0;
453 }
454
455 /* frame sending functions */
456
457 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
458 struct sk_buff *skb, u8 ap_ht_param,
459 struct ieee80211_supported_band *sband,
460 struct ieee80211_channel *channel,
461 enum ieee80211_smps_mode smps)
462 {
463 u8 *pos;
464 u32 flags = channel->flags;
465 u16 cap;
466 struct ieee80211_sta_ht_cap ht_cap;
467
468 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
469
470 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
471 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
472
473 /* determine capability flags */
474 cap = ht_cap.cap;
475
476 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
478 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
479 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
480 cap &= ~IEEE80211_HT_CAP_SGI_40;
481 }
482 break;
483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
484 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486 cap &= ~IEEE80211_HT_CAP_SGI_40;
487 }
488 break;
489 }
490
491 /*
492 * If 40 MHz was disabled associate as though we weren't
493 * capable of 40 MHz -- some broken APs will never fall
494 * back to trying to transmit in 20 MHz.
495 */
496 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
498 cap &= ~IEEE80211_HT_CAP_SGI_40;
499 }
500
501 /* set SM PS mode properly */
502 cap &= ~IEEE80211_HT_CAP_SM_PS;
503 switch (smps) {
504 case IEEE80211_SMPS_AUTOMATIC:
505 case IEEE80211_SMPS_NUM_MODES:
506 WARN_ON(1);
507 case IEEE80211_SMPS_OFF:
508 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
509 IEEE80211_HT_CAP_SM_PS_SHIFT;
510 break;
511 case IEEE80211_SMPS_STATIC:
512 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
513 IEEE80211_HT_CAP_SM_PS_SHIFT;
514 break;
515 case IEEE80211_SMPS_DYNAMIC:
516 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 }
520
521 /* reserve and fill IE */
522 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
523 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
524 }
525
526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
527 struct sk_buff *skb,
528 struct ieee80211_supported_band *sband,
529 struct ieee80211_vht_cap *ap_vht_cap)
530 {
531 u8 *pos;
532 u32 cap;
533 struct ieee80211_sta_vht_cap vht_cap;
534 u32 mask, ap_bf_sts, our_bf_sts;
535
536 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
537
538 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
539 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
540
541 /* determine capability flags */
542 cap = vht_cap.cap;
543
544 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
545 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
546 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
547 }
548
549 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
550 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
552 }
553
554 /*
555 * Some APs apparently get confused if our capabilities are better
556 * than theirs, so restrict what we advertise in the assoc request.
557 */
558 if (!(ap_vht_cap->vht_cap_info &
559 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
560 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
561
562 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
563
564 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
565 our_bf_sts = cap & mask;
566
567 if (ap_bf_sts < our_bf_sts) {
568 cap &= ~mask;
569 cap |= ap_bf_sts;
570 }
571
572 /* reserve and fill IE */
573 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
574 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
575 }
576
577 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
578 {
579 struct ieee80211_local *local = sdata->local;
580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
581 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
582 struct sk_buff *skb;
583 struct ieee80211_mgmt *mgmt;
584 u8 *pos, qos_info;
585 size_t offset = 0, noffset;
586 int i, count, rates_len, supp_rates_len, shift;
587 u16 capab;
588 struct ieee80211_supported_band *sband;
589 struct ieee80211_chanctx_conf *chanctx_conf;
590 struct ieee80211_channel *chan;
591 u32 rate_flags, rates = 0;
592
593 sdata_assert_lock(sdata);
594
595 rcu_read_lock();
596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
597 if (WARN_ON(!chanctx_conf)) {
598 rcu_read_unlock();
599 return;
600 }
601 chan = chanctx_conf->def.chan;
602 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
603 rcu_read_unlock();
604 sband = local->hw.wiphy->bands[chan->band];
605 shift = ieee80211_vif_get_shift(&sdata->vif);
606
607 if (assoc_data->supp_rates_len) {
608 /*
609 * Get all rates supported by the device and the AP as
610 * some APs don't like getting a superset of their rates
611 * in the association request (e.g. D-Link DAP 1353 in
612 * b-only mode)...
613 */
614 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
615 assoc_data->supp_rates,
616 assoc_data->supp_rates_len,
617 &rates);
618 } else {
619 /*
620 * In case AP not provide any supported rates information
621 * before association, we send information element(s) with
622 * all rates that we support.
623 */
624 rates_len = 0;
625 for (i = 0; i < sband->n_bitrates; i++) {
626 if ((rate_flags & sband->bitrates[i].flags)
627 != rate_flags)
628 continue;
629 rates |= BIT(i);
630 rates_len++;
631 }
632 }
633
634 skb = alloc_skb(local->hw.extra_tx_headroom +
635 sizeof(*mgmt) + /* bit too much but doesn't matter */
636 2 + assoc_data->ssid_len + /* SSID */
637 4 + rates_len + /* (extended) rates */
638 4 + /* power capability */
639 2 + 2 * sband->n_channels + /* supported channels */
640 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
641 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
642 assoc_data->ie_len + /* extra IEs */
643 9, /* WMM */
644 GFP_KERNEL);
645 if (!skb)
646 return;
647
648 skb_reserve(skb, local->hw.extra_tx_headroom);
649
650 capab = WLAN_CAPABILITY_ESS;
651
652 if (sband->band == IEEE80211_BAND_2GHZ) {
653 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
654 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
655 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
656 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
657 }
658
659 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
660 capab |= WLAN_CAPABILITY_PRIVACY;
661
662 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
663 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
664 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
665
666 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
667 memset(mgmt, 0, 24);
668 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
669 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
670 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
671
672 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
673 skb_put(skb, 10);
674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
675 IEEE80211_STYPE_REASSOC_REQ);
676 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
677 mgmt->u.reassoc_req.listen_interval =
678 cpu_to_le16(local->hw.conf.listen_interval);
679 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
680 ETH_ALEN);
681 } else {
682 skb_put(skb, 4);
683 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
684 IEEE80211_STYPE_ASSOC_REQ);
685 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
686 mgmt->u.assoc_req.listen_interval =
687 cpu_to_le16(local->hw.conf.listen_interval);
688 }
689
690 /* SSID */
691 pos = skb_put(skb, 2 + assoc_data->ssid_len);
692 *pos++ = WLAN_EID_SSID;
693 *pos++ = assoc_data->ssid_len;
694 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
695
696 /* add all rates which were marked to be used above */
697 supp_rates_len = rates_len;
698 if (supp_rates_len > 8)
699 supp_rates_len = 8;
700
701 pos = skb_put(skb, supp_rates_len + 2);
702 *pos++ = WLAN_EID_SUPP_RATES;
703 *pos++ = supp_rates_len;
704
705 count = 0;
706 for (i = 0; i < sband->n_bitrates; i++) {
707 if (BIT(i) & rates) {
708 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
709 5 * (1 << shift));
710 *pos++ = (u8) rate;
711 if (++count == 8)
712 break;
713 }
714 }
715
716 if (rates_len > count) {
717 pos = skb_put(skb, rates_len - count + 2);
718 *pos++ = WLAN_EID_EXT_SUPP_RATES;
719 *pos++ = rates_len - count;
720
721 for (i++; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
723 int rate;
724 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
725 5 * (1 << shift));
726 *pos++ = (u8) rate;
727 }
728 }
729 }
730
731 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
732 /* 1. power capabilities */
733 pos = skb_put(skb, 4);
734 *pos++ = WLAN_EID_PWR_CAPABILITY;
735 *pos++ = 2;
736 *pos++ = 0; /* min tx power */
737 /* max tx power */
738 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
739
740 /* 2. supported channels */
741 /* TODO: get this in reg domain format */
742 pos = skb_put(skb, 2 * sband->n_channels + 2);
743 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
744 *pos++ = 2 * sband->n_channels;
745 for (i = 0; i < sband->n_channels; i++) {
746 *pos++ = ieee80211_frequency_to_channel(
747 sband->channels[i].center_freq);
748 *pos++ = 1; /* one channel in the subband*/
749 }
750 }
751
752 /* if present, add any custom IEs that go before HT */
753 if (assoc_data->ie_len) {
754 static const u8 before_ht[] = {
755 WLAN_EID_SSID,
756 WLAN_EID_SUPP_RATES,
757 WLAN_EID_EXT_SUPP_RATES,
758 WLAN_EID_PWR_CAPABILITY,
759 WLAN_EID_SUPPORTED_CHANNELS,
760 WLAN_EID_RSN,
761 WLAN_EID_QOS_CAPA,
762 WLAN_EID_RRM_ENABLED_CAPABILITIES,
763 WLAN_EID_MOBILITY_DOMAIN,
764 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
765 };
766 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
767 before_ht, ARRAY_SIZE(before_ht),
768 offset);
769 pos = skb_put(skb, noffset - offset);
770 memcpy(pos, assoc_data->ie + offset, noffset - offset);
771 offset = noffset;
772 }
773
774 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
775 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
776 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
777
778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
779 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
780 sband, chan, sdata->smps_mode);
781
782 /* if present, add any custom IEs that go before VHT */
783 if (assoc_data->ie_len) {
784 static const u8 before_vht[] = {
785 WLAN_EID_SSID,
786 WLAN_EID_SUPP_RATES,
787 WLAN_EID_EXT_SUPP_RATES,
788 WLAN_EID_PWR_CAPABILITY,
789 WLAN_EID_SUPPORTED_CHANNELS,
790 WLAN_EID_RSN,
791 WLAN_EID_QOS_CAPA,
792 WLAN_EID_RRM_ENABLED_CAPABILITIES,
793 WLAN_EID_MOBILITY_DOMAIN,
794 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
795 WLAN_EID_HT_CAPABILITY,
796 WLAN_EID_BSS_COEX_2040,
797 WLAN_EID_EXT_CAPABILITY,
798 WLAN_EID_QOS_TRAFFIC_CAPA,
799 WLAN_EID_TIM_BCAST_REQ,
800 WLAN_EID_INTERWORKING,
801 };
802 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
803 before_vht, ARRAY_SIZE(before_vht),
804 offset);
805 pos = skb_put(skb, noffset - offset);
806 memcpy(pos, assoc_data->ie + offset, noffset - offset);
807 offset = noffset;
808 }
809
810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
811 ieee80211_add_vht_ie(sdata, skb, sband,
812 &assoc_data->ap_vht_cap);
813
814 /* if present, add any custom non-vendor IEs that go after HT */
815 if (assoc_data->ie_len) {
816 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
817 assoc_data->ie_len,
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
824 if (assoc_data->wmm) {
825 if (assoc_data->uapsd) {
826 qos_info = ifmgd->uapsd_queues;
827 qos_info |= (ifmgd->uapsd_max_sp_len <<
828 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
829 } else {
830 qos_info = 0;
831 }
832
833 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
834 }
835
836 /* add any remaining custom (i.e. vendor specific here) IEs */
837 if (assoc_data->ie_len) {
838 noffset = assoc_data->ie_len;
839 pos = skb_put(skb, noffset - offset);
840 memcpy(pos, assoc_data->ie + offset, noffset - offset);
841 }
842
843 drv_mgd_prepare_tx(local, sdata);
844
845 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
846 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
847 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
848 IEEE80211_TX_INTFL_MLME_CONN_TX;
849 ieee80211_tx_skb(sdata, skb);
850 }
851
852 void ieee80211_send_pspoll(struct ieee80211_local *local,
853 struct ieee80211_sub_if_data *sdata)
854 {
855 struct ieee80211_pspoll *pspoll;
856 struct sk_buff *skb;
857
858 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
859 if (!skb)
860 return;
861
862 pspoll = (struct ieee80211_pspoll *) skb->data;
863 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
864
865 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
866 ieee80211_tx_skb(sdata, skb);
867 }
868
869 void ieee80211_send_nullfunc(struct ieee80211_local *local,
870 struct ieee80211_sub_if_data *sdata,
871 int powersave)
872 {
873 struct sk_buff *skb;
874 struct ieee80211_hdr_3addr *nullfunc;
875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
876
877 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
878 if (!skb)
879 return;
880
881 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
882 if (powersave)
883 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
884
885 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
886 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
887
888 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
890
891 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
892 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
893
894 ieee80211_tx_skb(sdata, skb);
895 }
896
897 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
898 struct ieee80211_sub_if_data *sdata)
899 {
900 struct sk_buff *skb;
901 struct ieee80211_hdr *nullfunc;
902 __le16 fc;
903
904 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
905 return;
906
907 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
908 if (!skb)
909 return;
910
911 skb_reserve(skb, local->hw.extra_tx_headroom);
912
913 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
914 memset(nullfunc, 0, 30);
915 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
916 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
917 nullfunc->frame_control = fc;
918 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
919 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
920 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
921 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
922
923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
924 ieee80211_tx_skb(sdata, skb);
925 }
926
927 /* spectrum management related things */
928 static void ieee80211_chswitch_work(struct work_struct *work)
929 {
930 struct ieee80211_sub_if_data *sdata =
931 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
932 struct ieee80211_local *local = sdata->local;
933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
934 int ret;
935
936 if (!ieee80211_sdata_running(sdata))
937 return;
938
939 sdata_lock(sdata);
940 mutex_lock(&local->mtx);
941 mutex_lock(&local->chanctx_mtx);
942
943 if (!ifmgd->associated)
944 goto out;
945
946 if (!sdata->vif.csa_active)
947 goto out;
948
949 /*
950 * using reservation isn't immediate as it may be deferred until later
951 * with multi-vif. once reservation is complete it will re-schedule the
952 * work with no reserved_chanctx so verify chandef to check if it
953 * completed successfully
954 */
955
956 if (sdata->reserved_chanctx) {
957 /*
958 * with multi-vif csa driver may call ieee80211_csa_finish()
959 * many times while waiting for other interfaces to use their
960 * reservations
961 */
962 if (sdata->reserved_ready)
963 goto out;
964
965 ret = ieee80211_vif_use_reserved_context(sdata);
966 if (ret) {
967 sdata_info(sdata,
968 "failed to use reserved channel context, disconnecting (err=%d)\n",
969 ret);
970 ieee80211_queue_work(&sdata->local->hw,
971 &ifmgd->csa_connection_drop_work);
972 goto out;
973 }
974
975 goto out;
976 }
977
978 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
979 &sdata->csa_chandef)) {
980 sdata_info(sdata,
981 "failed to finalize channel switch, disconnecting\n");
982 ieee80211_queue_work(&sdata->local->hw,
983 &ifmgd->csa_connection_drop_work);
984 goto out;
985 }
986
987 /* XXX: shouldn't really modify cfg80211-owned data! */
988 ifmgd->associated->channel = sdata->csa_chandef.chan;
989
990 sdata->vif.csa_active = false;
991
992 /* XXX: wait for a beacon first? */
993 if (sdata->csa_block_tx) {
994 ieee80211_wake_vif_queues(local, sdata,
995 IEEE80211_QUEUE_STOP_REASON_CSA);
996 sdata->csa_block_tx = false;
997 }
998
999 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1000
1001 ieee80211_sta_reset_beacon_monitor(sdata);
1002 ieee80211_sta_reset_conn_monitor(sdata);
1003
1004 out:
1005 mutex_unlock(&local->chanctx_mtx);
1006 mutex_unlock(&local->mtx);
1007 sdata_unlock(sdata);
1008 }
1009
1010 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1011 {
1012 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1014
1015 trace_api_chswitch_done(sdata, success);
1016 if (!success) {
1017 sdata_info(sdata,
1018 "driver channel switch failed, disconnecting\n");
1019 ieee80211_queue_work(&sdata->local->hw,
1020 &ifmgd->csa_connection_drop_work);
1021 } else {
1022 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1023 }
1024 }
1025 EXPORT_SYMBOL(ieee80211_chswitch_done);
1026
1027 static void ieee80211_chswitch_timer(unsigned long data)
1028 {
1029 struct ieee80211_sub_if_data *sdata =
1030 (struct ieee80211_sub_if_data *) data;
1031
1032 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1033 }
1034
1035 static void
1036 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1037 u64 timestamp, struct ieee802_11_elems *elems,
1038 bool beacon)
1039 {
1040 struct ieee80211_local *local = sdata->local;
1041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1042 struct cfg80211_bss *cbss = ifmgd->associated;
1043 struct ieee80211_chanctx_conf *conf;
1044 struct ieee80211_chanctx *chanctx;
1045 enum ieee80211_band current_band;
1046 struct ieee80211_csa_ie csa_ie;
1047 int res;
1048
1049 sdata_assert_lock(sdata);
1050
1051 if (!cbss)
1052 return;
1053
1054 if (local->scanning)
1055 return;
1056
1057 /* disregard subsequent announcements if we are already processing */
1058 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1059 return;
1060
1061 current_band = cbss->channel->band;
1062 memset(&csa_ie, 0, sizeof(csa_ie));
1063 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1064 ifmgd->flags,
1065 ifmgd->associated->bssid, &csa_ie);
1066 if (res < 0)
1067 ieee80211_queue_work(&local->hw,
1068 &ifmgd->csa_connection_drop_work);
1069 if (res)
1070 return;
1071
1072 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1073 IEEE80211_CHAN_DISABLED)) {
1074 sdata_info(sdata,
1075 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1076 ifmgd->associated->bssid,
1077 csa_ie.chandef.chan->center_freq,
1078 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1079 csa_ie.chandef.center_freq2);
1080 ieee80211_queue_work(&local->hw,
1081 &ifmgd->csa_connection_drop_work);
1082 return;
1083 }
1084
1085 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1086
1087 mutex_lock(&local->mtx);
1088 mutex_lock(&local->chanctx_mtx);
1089 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1090 lockdep_is_held(&local->chanctx_mtx));
1091 if (!conf) {
1092 sdata_info(sdata,
1093 "no channel context assigned to vif?, disconnecting\n");
1094 ieee80211_queue_work(&local->hw,
1095 &ifmgd->csa_connection_drop_work);
1096 mutex_unlock(&local->chanctx_mtx);
1097 mutex_unlock(&local->mtx);
1098 return;
1099 }
1100
1101 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1102
1103 if (local->use_chanctx) {
1104 u32 num_chanctx = 0;
1105 list_for_each_entry(chanctx, &local->chanctx_list, list)
1106 num_chanctx++;
1107
1108 if (num_chanctx > 1 ||
1109 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1110 sdata_info(sdata,
1111 "not handling chan-switch with channel contexts\n");
1112 ieee80211_queue_work(&local->hw,
1113 &ifmgd->csa_connection_drop_work);
1114 mutex_unlock(&local->chanctx_mtx);
1115 mutex_unlock(&local->mtx);
1116 return;
1117 }
1118 }
1119
1120 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1121 chanctx->mode, false);
1122 if (res) {
1123 sdata_info(sdata,
1124 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1125 res);
1126 ieee80211_queue_work(&local->hw,
1127 &ifmgd->csa_connection_drop_work);
1128 mutex_unlock(&local->chanctx_mtx);
1129 mutex_unlock(&local->mtx);
1130 return;
1131 }
1132 mutex_unlock(&local->chanctx_mtx);
1133
1134 sdata->vif.csa_active = true;
1135 sdata->csa_chandef = csa_ie.chandef;
1136 sdata->csa_block_tx = csa_ie.mode;
1137
1138 if (sdata->csa_block_tx)
1139 ieee80211_stop_vif_queues(local, sdata,
1140 IEEE80211_QUEUE_STOP_REASON_CSA);
1141 mutex_unlock(&local->mtx);
1142
1143 if (local->ops->channel_switch) {
1144 /* use driver's channel switch callback */
1145 struct ieee80211_channel_switch ch_switch = {
1146 .timestamp = timestamp,
1147 .block_tx = csa_ie.mode,
1148 .chandef = csa_ie.chandef,
1149 .count = csa_ie.count,
1150 };
1151
1152 drv_channel_switch(local, &ch_switch);
1153 return;
1154 }
1155
1156 /* channel switch handled in software */
1157 if (csa_ie.count <= 1)
1158 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1159 else
1160 mod_timer(&ifmgd->chswitch_timer,
1161 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
1162 }
1163
1164 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1165 struct ieee80211_channel *channel,
1166 const u8 *country_ie, u8 country_ie_len,
1167 const u8 *pwr_constr_elem)
1168 {
1169 struct ieee80211_country_ie_triplet *triplet;
1170 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1171 int i, chan_pwr, chan_increment, new_ap_level;
1172 bool have_chan_pwr = false;
1173
1174 /* Invalid IE */
1175 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1176 return 0;
1177
1178 triplet = (void *)(country_ie + 3);
1179 country_ie_len -= 3;
1180
1181 switch (channel->band) {
1182 default:
1183 WARN_ON_ONCE(1);
1184 /* fall through */
1185 case IEEE80211_BAND_2GHZ:
1186 case IEEE80211_BAND_60GHZ:
1187 chan_increment = 1;
1188 break;
1189 case IEEE80211_BAND_5GHZ:
1190 chan_increment = 4;
1191 break;
1192 }
1193
1194 /* find channel */
1195 while (country_ie_len >= 3) {
1196 u8 first_channel = triplet->chans.first_channel;
1197
1198 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1199 goto next;
1200
1201 for (i = 0; i < triplet->chans.num_channels; i++) {
1202 if (first_channel + i * chan_increment == chan) {
1203 have_chan_pwr = true;
1204 chan_pwr = triplet->chans.max_power;
1205 break;
1206 }
1207 }
1208 if (have_chan_pwr)
1209 break;
1210
1211 next:
1212 triplet++;
1213 country_ie_len -= 3;
1214 }
1215
1216 if (!have_chan_pwr)
1217 return 0;
1218
1219 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1220
1221 if (sdata->ap_power_level == new_ap_level)
1222 return 0;
1223
1224 sdata_info(sdata,
1225 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1226 new_ap_level, chan_pwr, *pwr_constr_elem,
1227 sdata->u.mgd.bssid);
1228 sdata->ap_power_level = new_ap_level;
1229 if (__ieee80211_recalc_txpower(sdata))
1230 return BSS_CHANGED_TXPOWER;
1231 return 0;
1232 }
1233
1234 /* powersave */
1235 static void ieee80211_enable_ps(struct ieee80211_local *local,
1236 struct ieee80211_sub_if_data *sdata)
1237 {
1238 struct ieee80211_conf *conf = &local->hw.conf;
1239
1240 /*
1241 * If we are scanning right now then the parameters will
1242 * take effect when scan finishes.
1243 */
1244 if (local->scanning)
1245 return;
1246
1247 if (conf->dynamic_ps_timeout > 0 &&
1248 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1249 mod_timer(&local->dynamic_ps_timer, jiffies +
1250 msecs_to_jiffies(conf->dynamic_ps_timeout));
1251 } else {
1252 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1253 ieee80211_send_nullfunc(local, sdata, 1);
1254
1255 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1256 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1257 return;
1258
1259 conf->flags |= IEEE80211_CONF_PS;
1260 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1261 }
1262 }
1263
1264 static void ieee80211_change_ps(struct ieee80211_local *local)
1265 {
1266 struct ieee80211_conf *conf = &local->hw.conf;
1267
1268 if (local->ps_sdata) {
1269 ieee80211_enable_ps(local, local->ps_sdata);
1270 } else if (conf->flags & IEEE80211_CONF_PS) {
1271 conf->flags &= ~IEEE80211_CONF_PS;
1272 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1273 del_timer_sync(&local->dynamic_ps_timer);
1274 cancel_work_sync(&local->dynamic_ps_enable_work);
1275 }
1276 }
1277
1278 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1279 {
1280 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1281 struct sta_info *sta = NULL;
1282 bool authorized = false;
1283
1284 if (!mgd->powersave)
1285 return false;
1286
1287 if (mgd->broken_ap)
1288 return false;
1289
1290 if (!mgd->associated)
1291 return false;
1292
1293 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
1294 return false;
1295
1296 if (!mgd->have_beacon)
1297 return false;
1298
1299 rcu_read_lock();
1300 sta = sta_info_get(sdata, mgd->bssid);
1301 if (sta)
1302 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1303 rcu_read_unlock();
1304
1305 return authorized;
1306 }
1307
1308 /* need to hold RTNL or interface lock */
1309 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1310 {
1311 struct ieee80211_sub_if_data *sdata, *found = NULL;
1312 int count = 0;
1313 int timeout;
1314
1315 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1316 local->ps_sdata = NULL;
1317 return;
1318 }
1319
1320 list_for_each_entry(sdata, &local->interfaces, list) {
1321 if (!ieee80211_sdata_running(sdata))
1322 continue;
1323 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1324 /* If an AP vif is found, then disable PS
1325 * by setting the count to zero thereby setting
1326 * ps_sdata to NULL.
1327 */
1328 count = 0;
1329 break;
1330 }
1331 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1332 continue;
1333 found = sdata;
1334 count++;
1335 }
1336
1337 if (count == 1 && ieee80211_powersave_allowed(found)) {
1338 s32 beaconint_us;
1339
1340 if (latency < 0)
1341 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1342
1343 beaconint_us = ieee80211_tu_to_usec(
1344 found->vif.bss_conf.beacon_int);
1345
1346 timeout = local->dynamic_ps_forced_timeout;
1347 if (timeout < 0) {
1348 /*
1349 * Go to full PSM if the user configures a very low
1350 * latency requirement.
1351 * The 2000 second value is there for compatibility
1352 * until the PM_QOS_NETWORK_LATENCY is configured
1353 * with real values.
1354 */
1355 if (latency > (1900 * USEC_PER_MSEC) &&
1356 latency != (2000 * USEC_PER_SEC))
1357 timeout = 0;
1358 else
1359 timeout = 100;
1360 }
1361 local->hw.conf.dynamic_ps_timeout = timeout;
1362
1363 if (beaconint_us > latency) {
1364 local->ps_sdata = NULL;
1365 } else {
1366 int maxslp = 1;
1367 u8 dtimper = found->u.mgd.dtim_period;
1368
1369 /* If the TIM IE is invalid, pretend the value is 1 */
1370 if (!dtimper)
1371 dtimper = 1;
1372 else if (dtimper > 1)
1373 maxslp = min_t(int, dtimper,
1374 latency / beaconint_us);
1375
1376 local->hw.conf.max_sleep_period = maxslp;
1377 local->hw.conf.ps_dtim_period = dtimper;
1378 local->ps_sdata = found;
1379 }
1380 } else {
1381 local->ps_sdata = NULL;
1382 }
1383
1384 ieee80211_change_ps(local);
1385 }
1386
1387 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1388 {
1389 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1390
1391 if (sdata->vif.bss_conf.ps != ps_allowed) {
1392 sdata->vif.bss_conf.ps = ps_allowed;
1393 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1394 }
1395 }
1396
1397 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1398 {
1399 struct ieee80211_local *local =
1400 container_of(work, struct ieee80211_local,
1401 dynamic_ps_disable_work);
1402
1403 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1404 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1405 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406 }
1407
1408 ieee80211_wake_queues_by_reason(&local->hw,
1409 IEEE80211_MAX_QUEUE_MAP,
1410 IEEE80211_QUEUE_STOP_REASON_PS,
1411 false);
1412 }
1413
1414 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1415 {
1416 struct ieee80211_local *local =
1417 container_of(work, struct ieee80211_local,
1418 dynamic_ps_enable_work);
1419 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1420 struct ieee80211_if_managed *ifmgd;
1421 unsigned long flags;
1422 int q;
1423
1424 /* can only happen when PS was just disabled anyway */
1425 if (!sdata)
1426 return;
1427
1428 ifmgd = &sdata->u.mgd;
1429
1430 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1431 return;
1432
1433 if (local->hw.conf.dynamic_ps_timeout > 0) {
1434 /* don't enter PS if TX frames are pending */
1435 if (drv_tx_frames_pending(local)) {
1436 mod_timer(&local->dynamic_ps_timer, jiffies +
1437 msecs_to_jiffies(
1438 local->hw.conf.dynamic_ps_timeout));
1439 return;
1440 }
1441
1442 /*
1443 * transmission can be stopped by others which leads to
1444 * dynamic_ps_timer expiry. Postpone the ps timer if it
1445 * is not the actual idle state.
1446 */
1447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1448 for (q = 0; q < local->hw.queues; q++) {
1449 if (local->queue_stop_reasons[q]) {
1450 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1451 flags);
1452 mod_timer(&local->dynamic_ps_timer, jiffies +
1453 msecs_to_jiffies(
1454 local->hw.conf.dynamic_ps_timeout));
1455 return;
1456 }
1457 }
1458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1459 }
1460
1461 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1462 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1463 if (drv_tx_frames_pending(local)) {
1464 mod_timer(&local->dynamic_ps_timer, jiffies +
1465 msecs_to_jiffies(
1466 local->hw.conf.dynamic_ps_timeout));
1467 } else {
1468 ieee80211_send_nullfunc(local, sdata, 1);
1469 /* Flush to get the tx status of nullfunc frame */
1470 ieee80211_flush_queues(local, sdata);
1471 }
1472 }
1473
1474 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1475 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1476 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1477 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1478 local->hw.conf.flags |= IEEE80211_CONF_PS;
1479 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1480 }
1481 }
1482
1483 void ieee80211_dynamic_ps_timer(unsigned long data)
1484 {
1485 struct ieee80211_local *local = (void *) data;
1486
1487 if (local->quiescing || local->suspended)
1488 return;
1489
1490 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1491 }
1492
1493 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1494 {
1495 struct delayed_work *delayed_work =
1496 container_of(work, struct delayed_work, work);
1497 struct ieee80211_sub_if_data *sdata =
1498 container_of(delayed_work, struct ieee80211_sub_if_data,
1499 dfs_cac_timer_work);
1500 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
1501
1502 mutex_lock(&sdata->local->mtx);
1503 if (sdata->wdev.cac_started) {
1504 ieee80211_vif_release_channel(sdata);
1505 cfg80211_cac_event(sdata->dev, &chandef,
1506 NL80211_RADAR_CAC_FINISHED,
1507 GFP_KERNEL);
1508 }
1509 mutex_unlock(&sdata->local->mtx);
1510 }
1511
1512 /* MLME */
1513 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1514 struct ieee80211_sub_if_data *sdata,
1515 const u8 *wmm_param, size_t wmm_param_len)
1516 {
1517 struct ieee80211_tx_queue_params params;
1518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1519 size_t left;
1520 int count;
1521 const u8 *pos;
1522 u8 uapsd_queues = 0;
1523
1524 if (!local->ops->conf_tx)
1525 return false;
1526
1527 if (local->hw.queues < IEEE80211_NUM_ACS)
1528 return false;
1529
1530 if (!wmm_param)
1531 return false;
1532
1533 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1534 return false;
1535
1536 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1537 uapsd_queues = ifmgd->uapsd_queues;
1538
1539 count = wmm_param[6] & 0x0f;
1540 if (count == ifmgd->wmm_last_param_set)
1541 return false;
1542 ifmgd->wmm_last_param_set = count;
1543
1544 pos = wmm_param + 8;
1545 left = wmm_param_len - 8;
1546
1547 memset(&params, 0, sizeof(params));
1548
1549 sdata->wmm_acm = 0;
1550 for (; left >= 4; left -= 4, pos += 4) {
1551 int aci = (pos[0] >> 5) & 0x03;
1552 int acm = (pos[0] >> 4) & 0x01;
1553 bool uapsd = false;
1554 int queue;
1555
1556 switch (aci) {
1557 case 1: /* AC_BK */
1558 queue = 3;
1559 if (acm)
1560 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1561 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1562 uapsd = true;
1563 break;
1564 case 2: /* AC_VI */
1565 queue = 1;
1566 if (acm)
1567 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1568 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1569 uapsd = true;
1570 break;
1571 case 3: /* AC_VO */
1572 queue = 0;
1573 if (acm)
1574 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1575 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1576 uapsd = true;
1577 break;
1578 case 0: /* AC_BE */
1579 default:
1580 queue = 2;
1581 if (acm)
1582 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1583 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1584 uapsd = true;
1585 break;
1586 }
1587
1588 params.aifs = pos[0] & 0x0f;
1589 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1590 params.cw_min = ecw2cw(pos[1] & 0x0f);
1591 params.txop = get_unaligned_le16(pos + 2);
1592 params.acm = acm;
1593 params.uapsd = uapsd;
1594
1595 mlme_dbg(sdata,
1596 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1597 queue, aci, acm,
1598 params.aifs, params.cw_min, params.cw_max,
1599 params.txop, params.uapsd);
1600 sdata->tx_conf[queue] = params;
1601 if (drv_conf_tx(local, sdata, queue, &params))
1602 sdata_err(sdata,
1603 "failed to set TX queue parameters for queue %d\n",
1604 queue);
1605 }
1606
1607 /* enable WMM or activate new settings */
1608 sdata->vif.bss_conf.qos = true;
1609 return true;
1610 }
1611
1612 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1613 {
1614 lockdep_assert_held(&sdata->local->mtx);
1615
1616 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
1617 ieee80211_run_deferred_scan(sdata->local);
1618 }
1619
1620 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1621 {
1622 mutex_lock(&sdata->local->mtx);
1623 __ieee80211_stop_poll(sdata);
1624 mutex_unlock(&sdata->local->mtx);
1625 }
1626
1627 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1628 u16 capab, bool erp_valid, u8 erp)
1629 {
1630 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1631 u32 changed = 0;
1632 bool use_protection;
1633 bool use_short_preamble;
1634 bool use_short_slot;
1635
1636 if (erp_valid) {
1637 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1638 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1639 } else {
1640 use_protection = false;
1641 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1642 }
1643
1644 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1645 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1646 use_short_slot = true;
1647
1648 if (use_protection != bss_conf->use_cts_prot) {
1649 bss_conf->use_cts_prot = use_protection;
1650 changed |= BSS_CHANGED_ERP_CTS_PROT;
1651 }
1652
1653 if (use_short_preamble != bss_conf->use_short_preamble) {
1654 bss_conf->use_short_preamble = use_short_preamble;
1655 changed |= BSS_CHANGED_ERP_PREAMBLE;
1656 }
1657
1658 if (use_short_slot != bss_conf->use_short_slot) {
1659 bss_conf->use_short_slot = use_short_slot;
1660 changed |= BSS_CHANGED_ERP_SLOT;
1661 }
1662
1663 return changed;
1664 }
1665
1666 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1667 struct cfg80211_bss *cbss,
1668 u32 bss_info_changed)
1669 {
1670 struct ieee80211_bss *bss = (void *)cbss->priv;
1671 struct ieee80211_local *local = sdata->local;
1672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1673
1674 bss_info_changed |= BSS_CHANGED_ASSOC;
1675 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1676 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1677
1678 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1679 beacon_loss_count * bss_conf->beacon_int));
1680
1681 sdata->u.mgd.associated = cbss;
1682 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1683
1684 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1685
1686 if (sdata->vif.p2p) {
1687 const struct cfg80211_bss_ies *ies;
1688
1689 rcu_read_lock();
1690 ies = rcu_dereference(cbss->ies);
1691 if (ies) {
1692 int ret;
1693
1694 ret = cfg80211_get_p2p_attr(
1695 ies->data, ies->len,
1696 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1697 (u8 *) &bss_conf->p2p_noa_attr,
1698 sizeof(bss_conf->p2p_noa_attr));
1699 if (ret >= 2) {
1700 sdata->u.mgd.p2p_noa_index =
1701 bss_conf->p2p_noa_attr.index;
1702 bss_info_changed |= BSS_CHANGED_P2P_PS;
1703 }
1704 }
1705 rcu_read_unlock();
1706 }
1707
1708 /* just to be sure */
1709 ieee80211_stop_poll(sdata);
1710
1711 ieee80211_led_assoc(local, 1);
1712
1713 if (sdata->u.mgd.have_beacon) {
1714 /*
1715 * If the AP is buggy we may get here with no DTIM period
1716 * known, so assume it's 1 which is the only safe assumption
1717 * in that case, although if the TIM IE is broken powersave
1718 * probably just won't work at all.
1719 */
1720 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1721 bss_conf->beacon_rate = bss->beacon_rate;
1722 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
1723 } else {
1724 bss_conf->beacon_rate = NULL;
1725 bss_conf->dtim_period = 0;
1726 }
1727
1728 bss_conf->assoc = 1;
1729
1730 /* Tell the driver to monitor connection quality (if supported) */
1731 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1732 bss_conf->cqm_rssi_thold)
1733 bss_info_changed |= BSS_CHANGED_CQM;
1734
1735 /* Enable ARP filtering */
1736 if (bss_conf->arp_addr_cnt)
1737 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1738
1739 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1740
1741 mutex_lock(&local->iflist_mtx);
1742 ieee80211_recalc_ps(local, -1);
1743 mutex_unlock(&local->iflist_mtx);
1744
1745 ieee80211_recalc_smps(sdata);
1746 ieee80211_recalc_ps_vif(sdata);
1747
1748 netif_carrier_on(sdata->dev);
1749 }
1750
1751 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1752 u16 stype, u16 reason, bool tx,
1753 u8 *frame_buf)
1754 {
1755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1756 struct ieee80211_local *local = sdata->local;
1757 u32 changed = 0;
1758
1759 sdata_assert_lock(sdata);
1760
1761 if (WARN_ON_ONCE(tx && !frame_buf))
1762 return;
1763
1764 if (WARN_ON(!ifmgd->associated))
1765 return;
1766
1767 ieee80211_stop_poll(sdata);
1768
1769 ifmgd->associated = NULL;
1770 netif_carrier_off(sdata->dev);
1771
1772 /*
1773 * if we want to get out of ps before disassoc (why?) we have
1774 * to do it before sending disassoc, as otherwise the null-packet
1775 * won't be valid.
1776 */
1777 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1778 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1779 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1780 }
1781 local->ps_sdata = NULL;
1782
1783 /* disable per-vif ps */
1784 ieee80211_recalc_ps_vif(sdata);
1785
1786 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1787 if (tx)
1788 ieee80211_flush_queues(local, sdata);
1789
1790 /* deauthenticate/disassociate now */
1791 if (tx || frame_buf)
1792 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1793 reason, tx, frame_buf);
1794
1795 /* flush out frame */
1796 if (tx)
1797 ieee80211_flush_queues(local, sdata);
1798
1799 /* clear bssid only after building the needed mgmt frames */
1800 memset(ifmgd->bssid, 0, ETH_ALEN);
1801
1802 /* remove AP and TDLS peers */
1803 sta_info_flush(sdata);
1804
1805 /* finally reset all BSS / config parameters */
1806 changed |= ieee80211_reset_erp_info(sdata);
1807
1808 ieee80211_led_assoc(local, 0);
1809 changed |= BSS_CHANGED_ASSOC;
1810 sdata->vif.bss_conf.assoc = false;
1811
1812 ifmgd->p2p_noa_index = -1;
1813 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1814 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1815
1816 /* on the next assoc, re-program HT/VHT parameters */
1817 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1818 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1819 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1820 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1821
1822 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1823
1824 del_timer_sync(&local->dynamic_ps_timer);
1825 cancel_work_sync(&local->dynamic_ps_enable_work);
1826
1827 /* Disable ARP filtering */
1828 if (sdata->vif.bss_conf.arp_addr_cnt)
1829 changed |= BSS_CHANGED_ARP_FILTER;
1830
1831 sdata->vif.bss_conf.qos = false;
1832 changed |= BSS_CHANGED_QOS;
1833
1834 /* The BSSID (not really interesting) and HT changed */
1835 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1836 ieee80211_bss_info_change_notify(sdata, changed);
1837
1838 /* disassociated - set to defaults now */
1839 ieee80211_set_wmm_default(sdata, false);
1840
1841 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1842 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1843 del_timer_sync(&sdata->u.mgd.timer);
1844 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1845
1846 sdata->vif.bss_conf.dtim_period = 0;
1847 sdata->vif.bss_conf.beacon_rate = NULL;
1848
1849 ifmgd->have_beacon = false;
1850
1851 ifmgd->flags = 0;
1852 mutex_lock(&local->mtx);
1853 ieee80211_vif_release_channel(sdata);
1854
1855 sdata->vif.csa_active = false;
1856 if (sdata->csa_block_tx) {
1857 ieee80211_wake_vif_queues(local, sdata,
1858 IEEE80211_QUEUE_STOP_REASON_CSA);
1859 sdata->csa_block_tx = false;
1860 }
1861 mutex_unlock(&local->mtx);
1862
1863 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1864 }
1865
1866 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1867 struct ieee80211_hdr *hdr)
1868 {
1869 /*
1870 * We can postpone the mgd.timer whenever receiving unicast frames
1871 * from AP because we know that the connection is working both ways
1872 * at that time. But multicast frames (and hence also beacons) must
1873 * be ignored here, because we need to trigger the timer during
1874 * data idle periods for sending the periodic probe request to the
1875 * AP we're connected to.
1876 */
1877 if (is_multicast_ether_addr(hdr->addr1))
1878 return;
1879
1880 ieee80211_sta_reset_conn_monitor(sdata);
1881 }
1882
1883 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1884 {
1885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1886 struct ieee80211_local *local = sdata->local;
1887
1888 mutex_lock(&local->mtx);
1889 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1890 goto out;
1891
1892 __ieee80211_stop_poll(sdata);
1893
1894 mutex_lock(&local->iflist_mtx);
1895 ieee80211_recalc_ps(local, -1);
1896 mutex_unlock(&local->iflist_mtx);
1897
1898 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1899 goto out;
1900
1901 /*
1902 * We've received a probe response, but are not sure whether
1903 * we have or will be receiving any beacons or data, so let's
1904 * schedule the timers again, just in case.
1905 */
1906 ieee80211_sta_reset_beacon_monitor(sdata);
1907
1908 mod_timer(&ifmgd->conn_mon_timer,
1909 round_jiffies_up(jiffies +
1910 IEEE80211_CONNECTION_IDLE_TIME));
1911 out:
1912 mutex_unlock(&local->mtx);
1913 }
1914
1915 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1916 struct ieee80211_hdr *hdr, bool ack)
1917 {
1918 if (!ieee80211_is_data(hdr->frame_control))
1919 return;
1920
1921 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1922 sdata->u.mgd.probe_send_count > 0) {
1923 if (ack)
1924 ieee80211_sta_reset_conn_monitor(sdata);
1925 else
1926 sdata->u.mgd.nullfunc_failed = true;
1927 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1928 return;
1929 }
1930
1931 if (ack)
1932 ieee80211_sta_reset_conn_monitor(sdata);
1933 }
1934
1935 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1936 {
1937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1938 const u8 *ssid;
1939 u8 *dst = ifmgd->associated->bssid;
1940 u8 unicast_limit = max(1, max_probe_tries - 3);
1941
1942 /*
1943 * Try sending broadcast probe requests for the last three
1944 * probe requests after the first ones failed since some
1945 * buggy APs only support broadcast probe requests.
1946 */
1947 if (ifmgd->probe_send_count >= unicast_limit)
1948 dst = NULL;
1949
1950 /*
1951 * When the hardware reports an accurate Tx ACK status, it's
1952 * better to send a nullfunc frame instead of a probe request,
1953 * as it will kick us off the AP quickly if we aren't associated
1954 * anymore. The timeout will be reset if the frame is ACKed by
1955 * the AP.
1956 */
1957 ifmgd->probe_send_count++;
1958
1959 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1960 ifmgd->nullfunc_failed = false;
1961 ieee80211_send_nullfunc(sdata->local, sdata, 0);
1962 } else {
1963 int ssid_len;
1964
1965 rcu_read_lock();
1966 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1967 if (WARN_ON_ONCE(ssid == NULL))
1968 ssid_len = 0;
1969 else
1970 ssid_len = ssid[1];
1971
1972 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1973 0, (u32) -1, true, 0,
1974 ifmgd->associated->channel, false);
1975 rcu_read_unlock();
1976 }
1977
1978 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
1979 run_again(sdata, ifmgd->probe_timeout);
1980 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1981 ieee80211_flush_queues(sdata->local, sdata);
1982 }
1983
1984 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1985 bool beacon)
1986 {
1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1988 bool already = false;
1989
1990 if (!ieee80211_sdata_running(sdata))
1991 return;
1992
1993 sdata_lock(sdata);
1994
1995 if (!ifmgd->associated)
1996 goto out;
1997
1998 mutex_lock(&sdata->local->mtx);
1999
2000 if (sdata->local->tmp_channel || sdata->local->scanning) {
2001 mutex_unlock(&sdata->local->mtx);
2002 goto out;
2003 }
2004
2005 if (beacon) {
2006 mlme_dbg_ratelimited(sdata,
2007 "detected beacon loss from AP (missed %d beacons) - probing\n",
2008 beacon_loss_count);
2009
2010 ieee80211_cqm_rssi_notify(&sdata->vif,
2011 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2012 GFP_KERNEL);
2013 }
2014
2015 /*
2016 * The driver/our work has already reported this event or the
2017 * connection monitoring has kicked in and we have already sent
2018 * a probe request. Or maybe the AP died and the driver keeps
2019 * reporting until we disassociate...
2020 *
2021 * In either case we have to ignore the current call to this
2022 * function (except for setting the correct probe reason bit)
2023 * because otherwise we would reset the timer every time and
2024 * never check whether we received a probe response!
2025 */
2026 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2027 already = true;
2028
2029 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2030
2031 mutex_unlock(&sdata->local->mtx);
2032
2033 if (already)
2034 goto out;
2035
2036 mutex_lock(&sdata->local->iflist_mtx);
2037 ieee80211_recalc_ps(sdata->local, -1);
2038 mutex_unlock(&sdata->local->iflist_mtx);
2039
2040 ifmgd->probe_send_count = 0;
2041 ieee80211_mgd_probe_ap_send(sdata);
2042 out:
2043 sdata_unlock(sdata);
2044 }
2045
2046 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2047 struct ieee80211_vif *vif)
2048 {
2049 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2051 struct cfg80211_bss *cbss;
2052 struct sk_buff *skb;
2053 const u8 *ssid;
2054 int ssid_len;
2055
2056 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2057 return NULL;
2058
2059 sdata_assert_lock(sdata);
2060
2061 if (ifmgd->associated)
2062 cbss = ifmgd->associated;
2063 else if (ifmgd->auth_data)
2064 cbss = ifmgd->auth_data->bss;
2065 else if (ifmgd->assoc_data)
2066 cbss = ifmgd->assoc_data->bss;
2067 else
2068 return NULL;
2069
2070 rcu_read_lock();
2071 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2072 if (WARN_ON_ONCE(ssid == NULL))
2073 ssid_len = 0;
2074 else
2075 ssid_len = ssid[1];
2076
2077 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2078 (u32) -1, cbss->channel,
2079 ssid + 2, ssid_len,
2080 NULL, 0, true);
2081 rcu_read_unlock();
2082
2083 return skb;
2084 }
2085 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2086
2087 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2088 {
2089 struct ieee80211_local *local = sdata->local;
2090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2091 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2092
2093 sdata_lock(sdata);
2094 if (!ifmgd->associated) {
2095 sdata_unlock(sdata);
2096 return;
2097 }
2098
2099 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2100 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2101 true, frame_buf);
2102 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2103
2104 mutex_lock(&local->mtx);
2105 sdata->vif.csa_active = false;
2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2110 }
2111 mutex_unlock(&local->mtx);
2112
2113 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2114 IEEE80211_DEAUTH_FRAME_LEN);
2115 sdata_unlock(sdata);
2116 }
2117
2118 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2119 {
2120 struct ieee80211_sub_if_data *sdata =
2121 container_of(work, struct ieee80211_sub_if_data,
2122 u.mgd.beacon_connection_loss_work);
2123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2124 struct sta_info *sta;
2125
2126 if (ifmgd->associated) {
2127 rcu_read_lock();
2128 sta = sta_info_get(sdata, ifmgd->bssid);
2129 if (sta)
2130 sta->beacon_loss_count++;
2131 rcu_read_unlock();
2132 }
2133
2134 if (ifmgd->connection_loss) {
2135 sdata_info(sdata, "Connection to AP %pM lost\n",
2136 ifmgd->bssid);
2137 __ieee80211_disconnect(sdata);
2138 } else {
2139 ieee80211_mgd_probe_ap(sdata, true);
2140 }
2141 }
2142
2143 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2144 {
2145 struct ieee80211_sub_if_data *sdata =
2146 container_of(work, struct ieee80211_sub_if_data,
2147 u.mgd.csa_connection_drop_work);
2148
2149 __ieee80211_disconnect(sdata);
2150 }
2151
2152 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2153 {
2154 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2155 struct ieee80211_hw *hw = &sdata->local->hw;
2156
2157 trace_api_beacon_loss(sdata);
2158
2159 sdata->u.mgd.connection_loss = false;
2160 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2161 }
2162 EXPORT_SYMBOL(ieee80211_beacon_loss);
2163
2164 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2165 {
2166 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2167 struct ieee80211_hw *hw = &sdata->local->hw;
2168
2169 trace_api_connection_loss(sdata);
2170
2171 sdata->u.mgd.connection_loss = true;
2172 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2173 }
2174 EXPORT_SYMBOL(ieee80211_connection_loss);
2175
2176
2177 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2178 bool assoc)
2179 {
2180 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2181
2182 sdata_assert_lock(sdata);
2183
2184 if (!assoc) {
2185 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2186
2187 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2188 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2189 sdata->u.mgd.flags = 0;
2190 mutex_lock(&sdata->local->mtx);
2191 ieee80211_vif_release_channel(sdata);
2192 mutex_unlock(&sdata->local->mtx);
2193 }
2194
2195 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2196 kfree(auth_data);
2197 sdata->u.mgd.auth_data = NULL;
2198 }
2199
2200 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2201 struct ieee80211_mgmt *mgmt, size_t len)
2202 {
2203 struct ieee80211_local *local = sdata->local;
2204 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2205 u8 *pos;
2206 struct ieee802_11_elems elems;
2207 u32 tx_flags = 0;
2208
2209 pos = mgmt->u.auth.variable;
2210 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2211 if (!elems.challenge)
2212 return;
2213 auth_data->expected_transaction = 4;
2214 drv_mgd_prepare_tx(sdata->local, sdata);
2215 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2216 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2217 IEEE80211_TX_INTFL_MLME_CONN_TX;
2218 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2219 elems.challenge - 2, elems.challenge_len + 2,
2220 auth_data->bss->bssid, auth_data->bss->bssid,
2221 auth_data->key, auth_data->key_len,
2222 auth_data->key_idx, tx_flags);
2223 }
2224
2225 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2226 struct ieee80211_mgmt *mgmt, size_t len)
2227 {
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 u8 bssid[ETH_ALEN];
2230 u16 auth_alg, auth_transaction, status_code;
2231 struct sta_info *sta;
2232
2233 sdata_assert_lock(sdata);
2234
2235 if (len < 24 + 6)
2236 return;
2237
2238 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2239 return;
2240
2241 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2242
2243 if (!ether_addr_equal(bssid, mgmt->bssid))
2244 return;
2245
2246 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2247 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2248 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2249
2250 if (auth_alg != ifmgd->auth_data->algorithm ||
2251 auth_transaction != ifmgd->auth_data->expected_transaction) {
2252 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2253 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2254 auth_transaction,
2255 ifmgd->auth_data->expected_transaction);
2256 return;
2257 }
2258
2259 if (status_code != WLAN_STATUS_SUCCESS) {
2260 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2261 mgmt->sa, status_code);
2262 ieee80211_destroy_auth_data(sdata, false);
2263 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2264 return;
2265 }
2266
2267 switch (ifmgd->auth_data->algorithm) {
2268 case WLAN_AUTH_OPEN:
2269 case WLAN_AUTH_LEAP:
2270 case WLAN_AUTH_FT:
2271 case WLAN_AUTH_SAE:
2272 break;
2273 case WLAN_AUTH_SHARED_KEY:
2274 if (ifmgd->auth_data->expected_transaction != 4) {
2275 ieee80211_auth_challenge(sdata, mgmt, len);
2276 /* need another frame */
2277 return;
2278 }
2279 break;
2280 default:
2281 WARN_ONCE(1, "invalid auth alg %d",
2282 ifmgd->auth_data->algorithm);
2283 return;
2284 }
2285
2286 sdata_info(sdata, "authenticated\n");
2287 ifmgd->auth_data->done = true;
2288 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2289 ifmgd->auth_data->timeout_started = true;
2290 run_again(sdata, ifmgd->auth_data->timeout);
2291
2292 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2293 ifmgd->auth_data->expected_transaction != 2) {
2294 /*
2295 * Report auth frame to user space for processing since another
2296 * round of Authentication frames is still needed.
2297 */
2298 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2299 return;
2300 }
2301
2302 /* move station state to auth */
2303 mutex_lock(&sdata->local->sta_mtx);
2304 sta = sta_info_get(sdata, bssid);
2305 if (!sta) {
2306 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2307 goto out_err;
2308 }
2309 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2310 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2311 goto out_err;
2312 }
2313 mutex_unlock(&sdata->local->sta_mtx);
2314
2315 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2316 return;
2317 out_err:
2318 mutex_unlock(&sdata->local->sta_mtx);
2319 /* ignore frame -- wait for timeout */
2320 }
2321
2322 #define case_WLAN(type) \
2323 case WLAN_REASON_##type: return #type
2324
2325 static const char *ieee80211_get_reason_code_string(u16 reason_code)
2326 {
2327 switch (reason_code) {
2328 case_WLAN(UNSPECIFIED);
2329 case_WLAN(PREV_AUTH_NOT_VALID);
2330 case_WLAN(DEAUTH_LEAVING);
2331 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2332 case_WLAN(DISASSOC_AP_BUSY);
2333 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2334 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2335 case_WLAN(DISASSOC_STA_HAS_LEFT);
2336 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2337 case_WLAN(DISASSOC_BAD_POWER);
2338 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2339 case_WLAN(INVALID_IE);
2340 case_WLAN(MIC_FAILURE);
2341 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2342 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2343 case_WLAN(IE_DIFFERENT);
2344 case_WLAN(INVALID_GROUP_CIPHER);
2345 case_WLAN(INVALID_PAIRWISE_CIPHER);
2346 case_WLAN(INVALID_AKMP);
2347 case_WLAN(UNSUPP_RSN_VERSION);
2348 case_WLAN(INVALID_RSN_IE_CAP);
2349 case_WLAN(IEEE8021X_FAILED);
2350 case_WLAN(CIPHER_SUITE_REJECTED);
2351 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2352 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2353 case_WLAN(DISASSOC_LOW_ACK);
2354 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2355 case_WLAN(QSTA_LEAVE_QBSS);
2356 case_WLAN(QSTA_NOT_USE);
2357 case_WLAN(QSTA_REQUIRE_SETUP);
2358 case_WLAN(QSTA_TIMEOUT);
2359 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2360 case_WLAN(MESH_PEER_CANCELED);
2361 case_WLAN(MESH_MAX_PEERS);
2362 case_WLAN(MESH_CONFIG);
2363 case_WLAN(MESH_CLOSE);
2364 case_WLAN(MESH_MAX_RETRIES);
2365 case_WLAN(MESH_CONFIRM_TIMEOUT);
2366 case_WLAN(MESH_INVALID_GTK);
2367 case_WLAN(MESH_INCONSISTENT_PARAM);
2368 case_WLAN(MESH_INVALID_SECURITY);
2369 case_WLAN(MESH_PATH_ERROR);
2370 case_WLAN(MESH_PATH_NOFORWARD);
2371 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2372 case_WLAN(MAC_EXISTS_IN_MBSS);
2373 case_WLAN(MESH_CHAN_REGULATORY);
2374 case_WLAN(MESH_CHAN);
2375 default: return "<unknown>";
2376 }
2377 }
2378
2379 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2380 struct ieee80211_mgmt *mgmt, size_t len)
2381 {
2382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2383 const u8 *bssid = NULL;
2384 u16 reason_code;
2385
2386 sdata_assert_lock(sdata);
2387
2388 if (len < 24 + 2)
2389 return;
2390
2391 if (!ifmgd->associated ||
2392 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2393 return;
2394
2395 bssid = ifmgd->associated->bssid;
2396
2397 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2398
2399 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2400 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
2401
2402 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2403
2404 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2405 }
2406
2407
2408 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2409 struct ieee80211_mgmt *mgmt, size_t len)
2410 {
2411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2412 u16 reason_code;
2413
2414 sdata_assert_lock(sdata);
2415
2416 if (len < 24 + 2)
2417 return;
2418
2419 if (!ifmgd->associated ||
2420 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2421 return;
2422
2423 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2424
2425 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2426 mgmt->sa, reason_code);
2427
2428 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2429
2430 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2431 }
2432
2433 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2434 u8 *supp_rates, unsigned int supp_rates_len,
2435 u32 *rates, u32 *basic_rates,
2436 bool *have_higher_than_11mbit,
2437 int *min_rate, int *min_rate_index,
2438 int shift, u32 rate_flags)
2439 {
2440 int i, j;
2441
2442 for (i = 0; i < supp_rates_len; i++) {
2443 int rate = supp_rates[i] & 0x7f;
2444 bool is_basic = !!(supp_rates[i] & 0x80);
2445
2446 if ((rate * 5 * (1 << shift)) > 110)
2447 *have_higher_than_11mbit = true;
2448
2449 /*
2450 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2451 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2452 *
2453 * Note: Even through the membership selector and the basic
2454 * rate flag share the same bit, they are not exactly
2455 * the same.
2456 */
2457 if (!!(supp_rates[i] & 0x80) &&
2458 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2459 continue;
2460
2461 for (j = 0; j < sband->n_bitrates; j++) {
2462 struct ieee80211_rate *br;
2463 int brate;
2464
2465 br = &sband->bitrates[j];
2466 if ((rate_flags & br->flags) != rate_flags)
2467 continue;
2468
2469 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2470 if (brate == rate) {
2471 *rates |= BIT(j);
2472 if (is_basic)
2473 *basic_rates |= BIT(j);
2474 if ((rate * 5) < *min_rate) {
2475 *min_rate = rate * 5;
2476 *min_rate_index = j;
2477 }
2478 break;
2479 }
2480 }
2481 }
2482 }
2483
2484 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2485 bool assoc)
2486 {
2487 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2488
2489 sdata_assert_lock(sdata);
2490
2491 if (!assoc) {
2492 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2493
2494 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2495 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2496 sdata->u.mgd.flags = 0;
2497 mutex_lock(&sdata->local->mtx);
2498 ieee80211_vif_release_channel(sdata);
2499 mutex_unlock(&sdata->local->mtx);
2500 }
2501
2502 kfree(assoc_data);
2503 sdata->u.mgd.assoc_data = NULL;
2504 }
2505
2506 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2507 struct cfg80211_bss *cbss,
2508 struct ieee80211_mgmt *mgmt, size_t len)
2509 {
2510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2511 struct ieee80211_local *local = sdata->local;
2512 struct ieee80211_supported_band *sband;
2513 struct sta_info *sta;
2514 u8 *pos;
2515 u16 capab_info, aid;
2516 struct ieee802_11_elems elems;
2517 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2518 const struct cfg80211_bss_ies *bss_ies = NULL;
2519 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2520 u32 changed = 0;
2521 int err;
2522 bool ret;
2523
2524 /* AssocResp and ReassocResp have identical structure */
2525
2526 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2527 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2528
2529 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2530 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2531 aid);
2532 aid &= ~(BIT(15) | BIT(14));
2533
2534 ifmgd->broken_ap = false;
2535
2536 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2537 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2538 aid);
2539 aid = 0;
2540 ifmgd->broken_ap = true;
2541 }
2542
2543 pos = mgmt->u.assoc_resp.variable;
2544 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2545
2546 if (!elems.supp_rates) {
2547 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2548 return false;
2549 }
2550
2551 ifmgd->aid = aid;
2552
2553 /*
2554 * Some APs are erroneously not including some information in their
2555 * (re)association response frames. Try to recover by using the data
2556 * from the beacon or probe response. This seems to afflict mobile
2557 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2558 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2559 */
2560 if ((assoc_data->wmm && !elems.wmm_param) ||
2561 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2562 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2563 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2564 (!elems.vht_cap_elem || !elems.vht_operation))) {
2565 const struct cfg80211_bss_ies *ies;
2566 struct ieee802_11_elems bss_elems;
2567
2568 rcu_read_lock();
2569 ies = rcu_dereference(cbss->ies);
2570 if (ies)
2571 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2572 GFP_ATOMIC);
2573 rcu_read_unlock();
2574 if (!bss_ies)
2575 return false;
2576
2577 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2578 false, &bss_elems);
2579 if (assoc_data->wmm &&
2580 !elems.wmm_param && bss_elems.wmm_param) {
2581 elems.wmm_param = bss_elems.wmm_param;
2582 sdata_info(sdata,
2583 "AP bug: WMM param missing from AssocResp\n");
2584 }
2585
2586 /*
2587 * Also check if we requested HT/VHT, otherwise the AP doesn't
2588 * have to include the IEs in the (re)association response.
2589 */
2590 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2591 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2592 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2593 sdata_info(sdata,
2594 "AP bug: HT capability missing from AssocResp\n");
2595 }
2596 if (!elems.ht_operation && bss_elems.ht_operation &&
2597 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2598 elems.ht_operation = bss_elems.ht_operation;
2599 sdata_info(sdata,
2600 "AP bug: HT operation missing from AssocResp\n");
2601 }
2602 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2603 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2604 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2605 sdata_info(sdata,
2606 "AP bug: VHT capa missing from AssocResp\n");
2607 }
2608 if (!elems.vht_operation && bss_elems.vht_operation &&
2609 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2610 elems.vht_operation = bss_elems.vht_operation;
2611 sdata_info(sdata,
2612 "AP bug: VHT operation missing from AssocResp\n");
2613 }
2614 }
2615
2616 /*
2617 * We previously checked these in the beacon/probe response, so
2618 * they should be present here. This is just a safety net.
2619 */
2620 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2621 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2622 sdata_info(sdata,
2623 "HT AP is missing WMM params or HT capability/operation\n");
2624 ret = false;
2625 goto out;
2626 }
2627
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2629 (!elems.vht_cap_elem || !elems.vht_operation)) {
2630 sdata_info(sdata,
2631 "VHT AP is missing VHT capability/operation\n");
2632 ret = false;
2633 goto out;
2634 }
2635
2636 mutex_lock(&sdata->local->sta_mtx);
2637 /*
2638 * station info was already allocated and inserted before
2639 * the association and should be available to us
2640 */
2641 sta = sta_info_get(sdata, cbss->bssid);
2642 if (WARN_ON(!sta)) {
2643 mutex_unlock(&sdata->local->sta_mtx);
2644 ret = false;
2645 goto out;
2646 }
2647
2648 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2649
2650 /* Set up internal HT/VHT capabilities */
2651 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2652 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2653 elems.ht_cap_elem, sta);
2654
2655 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2656 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2657 elems.vht_cap_elem, sta);
2658
2659 /*
2660 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2661 * in their association response, so ignore that data for our own
2662 * configuration. If it changed since the last beacon, we'll get the
2663 * next beacon and update then.
2664 */
2665
2666 /*
2667 * If an operating mode notification IE is present, override the
2668 * NSS calculation (that would be done in rate_control_rate_init())
2669 * and use the # of streams from that element.
2670 */
2671 if (elems.opmode_notif &&
2672 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2673 u8 nss;
2674
2675 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2676 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2677 nss += 1;
2678 sta->sta.rx_nss = nss;
2679 }
2680
2681 rate_control_rate_init(sta);
2682
2683 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2684 set_sta_flag(sta, WLAN_STA_MFP);
2685
2686 if (elems.wmm_param)
2687 set_sta_flag(sta, WLAN_STA_WME);
2688
2689 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2690 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2691 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2692 if (err) {
2693 sdata_info(sdata,
2694 "failed to move station %pM to desired state\n",
2695 sta->sta.addr);
2696 WARN_ON(__sta_info_destroy(sta));
2697 mutex_unlock(&sdata->local->sta_mtx);
2698 ret = false;
2699 goto out;
2700 }
2701
2702 mutex_unlock(&sdata->local->sta_mtx);
2703
2704 /*
2705 * Always handle WMM once after association regardless
2706 * of the first value the AP uses. Setting -1 here has
2707 * that effect because the AP values is an unsigned
2708 * 4-bit value.
2709 */
2710 ifmgd->wmm_last_param_set = -1;
2711
2712 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
2713 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2714 elems.wmm_param_len);
2715 else
2716 ieee80211_set_wmm_default(sdata, false);
2717 changed |= BSS_CHANGED_QOS;
2718
2719 /* set AID and assoc capability,
2720 * ieee80211_set_associated() will tell the driver */
2721 bss_conf->aid = aid;
2722 bss_conf->assoc_capability = capab_info;
2723 ieee80211_set_associated(sdata, cbss, changed);
2724
2725 /*
2726 * If we're using 4-addr mode, let the AP know that we're
2727 * doing so, so that it can create the STA VLAN on its side
2728 */
2729 if (ifmgd->use_4addr)
2730 ieee80211_send_4addr_nullfunc(local, sdata);
2731
2732 /*
2733 * Start timer to probe the connection to the AP now.
2734 * Also start the timer that will detect beacon loss.
2735 */
2736 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2737 ieee80211_sta_reset_beacon_monitor(sdata);
2738
2739 ret = true;
2740 out:
2741 kfree(bss_ies);
2742 return ret;
2743 }
2744
2745 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2746 struct ieee80211_mgmt *mgmt,
2747 size_t len)
2748 {
2749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2750 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2751 u16 capab_info, status_code, aid;
2752 struct ieee802_11_elems elems;
2753 u8 *pos;
2754 bool reassoc;
2755 struct cfg80211_bss *bss;
2756
2757 sdata_assert_lock(sdata);
2758
2759 if (!assoc_data)
2760 return;
2761 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2762 return;
2763
2764 /*
2765 * AssocResp and ReassocResp have identical structure, so process both
2766 * of them in this function.
2767 */
2768
2769 if (len < 24 + 6)
2770 return;
2771
2772 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2773 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2774 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2775 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2776
2777 sdata_info(sdata,
2778 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2779 reassoc ? "Rea" : "A", mgmt->sa,
2780 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2781
2782 pos = mgmt->u.assoc_resp.variable;
2783 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2784
2785 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2786 elems.timeout_int &&
2787 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2788 u32 tu, ms;
2789 tu = le32_to_cpu(elems.timeout_int->value);
2790 ms = tu * 1024 / 1000;
2791 sdata_info(sdata,
2792 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2793 mgmt->sa, tu, ms);
2794 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2795 assoc_data->timeout_started = true;
2796 if (ms > IEEE80211_ASSOC_TIMEOUT)
2797 run_again(sdata, assoc_data->timeout);
2798 return;
2799 }
2800
2801 bss = assoc_data->bss;
2802
2803 if (status_code != WLAN_STATUS_SUCCESS) {
2804 sdata_info(sdata, "%pM denied association (code=%d)\n",
2805 mgmt->sa, status_code);
2806 ieee80211_destroy_assoc_data(sdata, false);
2807 } else {
2808 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
2809 /* oops -- internal error -- send timeout for now */
2810 ieee80211_destroy_assoc_data(sdata, false);
2811 cfg80211_assoc_timeout(sdata->dev, bss);
2812 return;
2813 }
2814 sdata_info(sdata, "associated\n");
2815
2816 /*
2817 * destroy assoc_data afterwards, as otherwise an idle
2818 * recalc after assoc_data is NULL but before associated
2819 * is set can cause the interface to go idle
2820 */
2821 ieee80211_destroy_assoc_data(sdata, true);
2822 }
2823
2824 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
2825 }
2826
2827 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2828 struct ieee80211_mgmt *mgmt, size_t len,
2829 struct ieee80211_rx_status *rx_status,
2830 struct ieee802_11_elems *elems)
2831 {
2832 struct ieee80211_local *local = sdata->local;
2833 struct ieee80211_bss *bss;
2834 struct ieee80211_channel *channel;
2835
2836 sdata_assert_lock(sdata);
2837
2838 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2839 if (!channel)
2840 return;
2841
2842 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2843 channel);
2844 if (bss) {
2845 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2846 ieee80211_rx_bss_put(local, bss);
2847 }
2848 }
2849
2850
2851 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2852 struct sk_buff *skb)
2853 {
2854 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2855 struct ieee80211_if_managed *ifmgd;
2856 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2857 size_t baselen, len = skb->len;
2858 struct ieee802_11_elems elems;
2859
2860 ifmgd = &sdata->u.mgd;
2861
2862 sdata_assert_lock(sdata);
2863
2864 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2865 return; /* ignore ProbeResp to foreign address */
2866
2867 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2868 if (baselen > len)
2869 return;
2870
2871 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2872 false, &elems);
2873
2874 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2875
2876 if (ifmgd->associated &&
2877 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2878 ieee80211_reset_ap_probe(sdata);
2879
2880 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2881 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2882 /* got probe response, continue with auth */
2883 sdata_info(sdata, "direct probe responded\n");
2884 ifmgd->auth_data->tries = 0;
2885 ifmgd->auth_data->timeout = jiffies;
2886 ifmgd->auth_data->timeout_started = true;
2887 run_again(sdata, ifmgd->auth_data->timeout);
2888 }
2889 }
2890
2891 /*
2892 * This is the canonical list of information elements we care about,
2893 * the filter code also gives us all changes to the Microsoft OUI
2894 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2895 *
2896 * We implement beacon filtering in software since that means we can
2897 * avoid processing the frame here and in cfg80211, and userspace
2898 * will not be able to tell whether the hardware supports it or not.
2899 *
2900 * XXX: This list needs to be dynamic -- userspace needs to be able to
2901 * add items it requires. It also needs to be able to tell us to
2902 * look out for other vendor IEs.
2903 */
2904 static const u64 care_about_ies =
2905 (1ULL << WLAN_EID_COUNTRY) |
2906 (1ULL << WLAN_EID_ERP_INFO) |
2907 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2908 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2909 (1ULL << WLAN_EID_HT_CAPABILITY) |
2910 (1ULL << WLAN_EID_HT_OPERATION);
2911
2912 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2913 struct ieee80211_mgmt *mgmt, size_t len,
2914 struct ieee80211_rx_status *rx_status)
2915 {
2916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2917 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2918 size_t baselen;
2919 struct ieee802_11_elems elems;
2920 struct ieee80211_local *local = sdata->local;
2921 struct ieee80211_chanctx_conf *chanctx_conf;
2922 struct ieee80211_channel *chan;
2923 struct sta_info *sta;
2924 u32 changed = 0;
2925 bool erp_valid;
2926 u8 erp_value = 0;
2927 u32 ncrc;
2928 u8 *bssid;
2929 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
2930
2931 sdata_assert_lock(sdata);
2932
2933 /* Process beacon from the current BSS */
2934 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2935 if (baselen > len)
2936 return;
2937
2938 rcu_read_lock();
2939 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2940 if (!chanctx_conf) {
2941 rcu_read_unlock();
2942 return;
2943 }
2944
2945 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2946 rcu_read_unlock();
2947 return;
2948 }
2949 chan = chanctx_conf->def.chan;
2950 rcu_read_unlock();
2951
2952 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2953 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2954 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2955 len - baselen, false, &elems);
2956
2957 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2958 if (elems.tim && !elems.parse_error) {
2959 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2960 ifmgd->dtim_period = tim_ie->dtim_period;
2961 }
2962 ifmgd->have_beacon = true;
2963 ifmgd->assoc_data->need_beacon = false;
2964 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2965 sdata->vif.bss_conf.sync_tsf =
2966 le64_to_cpu(mgmt->u.beacon.timestamp);
2967 sdata->vif.bss_conf.sync_device_ts =
2968 rx_status->device_timestamp;
2969 if (elems.tim)
2970 sdata->vif.bss_conf.sync_dtim_count =
2971 elems.tim->dtim_count;
2972 else
2973 sdata->vif.bss_conf.sync_dtim_count = 0;
2974 }
2975 /* continue assoc process */
2976 ifmgd->assoc_data->timeout = jiffies;
2977 ifmgd->assoc_data->timeout_started = true;
2978 run_again(sdata, ifmgd->assoc_data->timeout);
2979 return;
2980 }
2981
2982 if (!ifmgd->associated ||
2983 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2984 return;
2985 bssid = ifmgd->associated->bssid;
2986
2987 /* Track average RSSI from the Beacon frames of the current AP */
2988 ifmgd->last_beacon_signal = rx_status->signal;
2989 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2990 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2991 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2992 ifmgd->last_cqm_event_signal = 0;
2993 ifmgd->count_beacon_signal = 1;
2994 ifmgd->last_ave_beacon_signal = 0;
2995 } else {
2996 ifmgd->ave_beacon_signal =
2997 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2998 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2999 ifmgd->ave_beacon_signal) / 16;
3000 ifmgd->count_beacon_signal++;
3001 }
3002
3003 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3004 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3005 int sig = ifmgd->ave_beacon_signal;
3006 int last_sig = ifmgd->last_ave_beacon_signal;
3007
3008 /*
3009 * if signal crosses either of the boundaries, invoke callback
3010 * with appropriate parameters
3011 */
3012 if (sig > ifmgd->rssi_max_thold &&
3013 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3014 ifmgd->last_ave_beacon_signal = sig;
3015 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
3016 } else if (sig < ifmgd->rssi_min_thold &&
3017 (last_sig >= ifmgd->rssi_max_thold ||
3018 last_sig == 0)) {
3019 ifmgd->last_ave_beacon_signal = sig;
3020 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
3021 }
3022 }
3023
3024 if (bss_conf->cqm_rssi_thold &&
3025 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
3026 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
3027 int sig = ifmgd->ave_beacon_signal / 16;
3028 int last_event = ifmgd->last_cqm_event_signal;
3029 int thold = bss_conf->cqm_rssi_thold;
3030 int hyst = bss_conf->cqm_rssi_hyst;
3031 if (sig < thold &&
3032 (last_event == 0 || sig < last_event - hyst)) {
3033 ifmgd->last_cqm_event_signal = sig;
3034 ieee80211_cqm_rssi_notify(
3035 &sdata->vif,
3036 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3037 GFP_KERNEL);
3038 } else if (sig > thold &&
3039 (last_event == 0 || sig > last_event + hyst)) {
3040 ifmgd->last_cqm_event_signal = sig;
3041 ieee80211_cqm_rssi_notify(
3042 &sdata->vif,
3043 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3044 GFP_KERNEL);
3045 }
3046 }
3047
3048 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
3049 mlme_dbg_ratelimited(sdata,
3050 "cancelling AP probe due to a received beacon\n");
3051 ieee80211_reset_ap_probe(sdata);
3052 }
3053
3054 /*
3055 * Push the beacon loss detection into the future since
3056 * we are processing a beacon from the AP just now.
3057 */
3058 ieee80211_sta_reset_beacon_monitor(sdata);
3059
3060 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3061 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3062 len - baselen, false, &elems,
3063 care_about_ies, ncrc);
3064
3065 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3066 bool directed_tim = ieee80211_check_tim(elems.tim,
3067 elems.tim_len,
3068 ifmgd->aid);
3069 if (directed_tim) {
3070 if (local->hw.conf.dynamic_ps_timeout > 0) {
3071 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3072 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3073 ieee80211_hw_config(local,
3074 IEEE80211_CONF_CHANGE_PS);
3075 }
3076 ieee80211_send_nullfunc(local, sdata, 0);
3077 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3078 local->pspolling = true;
3079
3080 /*
3081 * Here is assumed that the driver will be
3082 * able to send ps-poll frame and receive a
3083 * response even though power save mode is
3084 * enabled, but some drivers might require
3085 * to disable power save here. This needs
3086 * to be investigated.
3087 */
3088 ieee80211_send_pspoll(local, sdata);
3089 }
3090 }
3091 }
3092
3093 if (sdata->vif.p2p) {
3094 struct ieee80211_p2p_noa_attr noa = {};
3095 int ret;
3096
3097 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3098 len - baselen,
3099 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3100 (u8 *) &noa, sizeof(noa));
3101 if (ret >= 2) {
3102 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3103 /* valid noa_attr and index changed */
3104 sdata->u.mgd.p2p_noa_index = noa.index;
3105 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3106 changed |= BSS_CHANGED_P2P_PS;
3107 /*
3108 * make sure we update all information, the CRC
3109 * mechanism doesn't look at P2P attributes.
3110 */
3111 ifmgd->beacon_crc_valid = false;
3112 }
3113 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3114 /* noa_attr not found and we had valid noa_attr before */
3115 sdata->u.mgd.p2p_noa_index = -1;
3116 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3117 changed |= BSS_CHANGED_P2P_PS;
3118 ifmgd->beacon_crc_valid = false;
3119 }
3120 }
3121
3122 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3123 return;
3124 ifmgd->beacon_crc = ncrc;
3125 ifmgd->beacon_crc_valid = true;
3126
3127 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3128
3129 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3130 &elems, true);
3131
3132 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3133 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3134 elems.wmm_param_len))
3135 changed |= BSS_CHANGED_QOS;
3136
3137 /*
3138 * If we haven't had a beacon before, tell the driver about the
3139 * DTIM period (and beacon timing if desired) now.
3140 */
3141 if (!ifmgd->have_beacon) {
3142 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3143 if (elems.tim)
3144 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3145 else
3146 bss_conf->dtim_period = 1;
3147
3148 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3149 sdata->vif.bss_conf.sync_tsf =
3150 le64_to_cpu(mgmt->u.beacon.timestamp);
3151 sdata->vif.bss_conf.sync_device_ts =
3152 rx_status->device_timestamp;
3153 if (elems.tim)
3154 sdata->vif.bss_conf.sync_dtim_count =
3155 elems.tim->dtim_count;
3156 else
3157 sdata->vif.bss_conf.sync_dtim_count = 0;
3158 }
3159
3160 changed |= BSS_CHANGED_BEACON_INFO;
3161 ifmgd->have_beacon = true;
3162
3163 mutex_lock(&local->iflist_mtx);
3164 ieee80211_recalc_ps(local, -1);
3165 mutex_unlock(&local->iflist_mtx);
3166
3167 ieee80211_recalc_ps_vif(sdata);
3168 }
3169
3170 if (elems.erp_info) {
3171 erp_valid = true;
3172 erp_value = elems.erp_info[0];
3173 } else {
3174 erp_valid = false;
3175 }
3176 changed |= ieee80211_handle_bss_capability(sdata,
3177 le16_to_cpu(mgmt->u.beacon.capab_info),
3178 erp_valid, erp_value);
3179
3180 mutex_lock(&local->sta_mtx);
3181 sta = sta_info_get(sdata, bssid);
3182
3183 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3184 elems.vht_operation, bssid, &changed)) {
3185 mutex_unlock(&local->sta_mtx);
3186 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3187 WLAN_REASON_DEAUTH_LEAVING,
3188 true, deauth_buf);
3189 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3190 sizeof(deauth_buf));
3191 return;
3192 }
3193
3194 if (sta && elems.opmode_notif)
3195 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3196 rx_status->band, true);
3197 mutex_unlock(&local->sta_mtx);
3198
3199 if (elems.country_elem && elems.pwr_constr_elem &&
3200 mgmt->u.probe_resp.capab_info &
3201 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3202 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3203 elems.country_elem,
3204 elems.country_elem_len,
3205 elems.pwr_constr_elem);
3206
3207 ieee80211_bss_info_change_notify(sdata, changed);
3208 }
3209
3210 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3211 struct sk_buff *skb)
3212 {
3213 struct ieee80211_rx_status *rx_status;
3214 struct ieee80211_mgmt *mgmt;
3215 u16 fc;
3216 struct ieee802_11_elems elems;
3217 int ies_len;
3218
3219 rx_status = (struct ieee80211_rx_status *) skb->cb;
3220 mgmt = (struct ieee80211_mgmt *) skb->data;
3221 fc = le16_to_cpu(mgmt->frame_control);
3222
3223 sdata_lock(sdata);
3224
3225 switch (fc & IEEE80211_FCTL_STYPE) {
3226 case IEEE80211_STYPE_BEACON:
3227 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
3228 break;
3229 case IEEE80211_STYPE_PROBE_RESP:
3230 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3231 break;
3232 case IEEE80211_STYPE_AUTH:
3233 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3234 break;
3235 case IEEE80211_STYPE_DEAUTH:
3236 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3237 break;
3238 case IEEE80211_STYPE_DISASSOC:
3239 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3240 break;
3241 case IEEE80211_STYPE_ASSOC_RESP:
3242 case IEEE80211_STYPE_REASSOC_RESP:
3243 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
3244 break;
3245 case IEEE80211_STYPE_ACTION:
3246 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3247 ies_len = skb->len -
3248 offsetof(struct ieee80211_mgmt,
3249 u.action.u.chan_switch.variable);
3250
3251 if (ies_len < 0)
3252 break;
3253
3254 ieee802_11_parse_elems(
3255 mgmt->u.action.u.chan_switch.variable,
3256 ies_len, true, &elems);
3257
3258 if (elems.parse_error)
3259 break;
3260
3261 ieee80211_sta_process_chanswitch(sdata,
3262 rx_status->mactime,
3263 &elems, false);
3264 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3265 ies_len = skb->len -
3266 offsetof(struct ieee80211_mgmt,
3267 u.action.u.ext_chan_switch.variable);
3268
3269 if (ies_len < 0)
3270 break;
3271
3272 ieee802_11_parse_elems(
3273 mgmt->u.action.u.ext_chan_switch.variable,
3274 ies_len, true, &elems);
3275
3276 if (elems.parse_error)
3277 break;
3278
3279 /* for the handling code pretend this was also an IE */
3280 elems.ext_chansw_ie =
3281 &mgmt->u.action.u.ext_chan_switch.data;
3282
3283 ieee80211_sta_process_chanswitch(sdata,
3284 rx_status->mactime,
3285 &elems, false);
3286 }
3287 break;
3288 }
3289 sdata_unlock(sdata);
3290 }
3291
3292 static void ieee80211_sta_timer(unsigned long data)
3293 {
3294 struct ieee80211_sub_if_data *sdata =
3295 (struct ieee80211_sub_if_data *) data;
3296
3297 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3298 }
3299
3300 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3301 u8 *bssid, u8 reason, bool tx)
3302 {
3303 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3304
3305 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3306 tx, frame_buf);
3307
3308 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3309 IEEE80211_DEAUTH_FRAME_LEN);
3310 }
3311
3312 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3313 {
3314 struct ieee80211_local *local = sdata->local;
3315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3316 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3317 u32 tx_flags = 0;
3318
3319 sdata_assert_lock(sdata);
3320
3321 if (WARN_ON_ONCE(!auth_data))
3322 return -EINVAL;
3323
3324 auth_data->tries++;
3325
3326 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3327 sdata_info(sdata, "authentication with %pM timed out\n",
3328 auth_data->bss->bssid);
3329
3330 /*
3331 * Most likely AP is not in the range so remove the
3332 * bss struct for that AP.
3333 */
3334 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3335
3336 return -ETIMEDOUT;
3337 }
3338
3339 drv_mgd_prepare_tx(local, sdata);
3340
3341 if (auth_data->bss->proberesp_ies) {
3342 u16 trans = 1;
3343 u16 status = 0;
3344
3345 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3346 auth_data->bss->bssid, auth_data->tries,
3347 IEEE80211_AUTH_MAX_TRIES);
3348
3349 auth_data->expected_transaction = 2;
3350
3351 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3352 trans = auth_data->sae_trans;
3353 status = auth_data->sae_status;
3354 auth_data->expected_transaction = trans;
3355 }
3356
3357 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3358 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3359 IEEE80211_TX_INTFL_MLME_CONN_TX;
3360
3361 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3362 auth_data->data, auth_data->data_len,
3363 auth_data->bss->bssid,
3364 auth_data->bss->bssid, NULL, 0, 0,
3365 tx_flags);
3366 } else {
3367 const u8 *ssidie;
3368
3369 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3370 auth_data->bss->bssid, auth_data->tries,
3371 IEEE80211_AUTH_MAX_TRIES);
3372
3373 rcu_read_lock();
3374 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3375 if (!ssidie) {
3376 rcu_read_unlock();
3377 return -EINVAL;
3378 }
3379 /*
3380 * Direct probe is sent to broadcast address as some APs
3381 * will not answer to direct packet in unassociated state.
3382 */
3383 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3384 NULL, 0, (u32) -1, true, 0,
3385 auth_data->bss->channel, false);
3386 rcu_read_unlock();
3387 }
3388
3389 if (tx_flags == 0) {
3390 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3391 auth_data->timeout_started = true;
3392 run_again(sdata, auth_data->timeout);
3393 } else {
3394 auth_data->timeout =
3395 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3396 auth_data->timeout_started = true;
3397 run_again(sdata, auth_data->timeout);
3398 }
3399
3400 return 0;
3401 }
3402
3403 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3404 {
3405 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3406 struct ieee80211_local *local = sdata->local;
3407
3408 sdata_assert_lock(sdata);
3409
3410 assoc_data->tries++;
3411 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3412 sdata_info(sdata, "association with %pM timed out\n",
3413 assoc_data->bss->bssid);
3414
3415 /*
3416 * Most likely AP is not in the range so remove the
3417 * bss struct for that AP.
3418 */
3419 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3420
3421 return -ETIMEDOUT;
3422 }
3423
3424 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3425 assoc_data->bss->bssid, assoc_data->tries,
3426 IEEE80211_ASSOC_MAX_TRIES);
3427 ieee80211_send_assoc(sdata);
3428
3429 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3430 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3431 assoc_data->timeout_started = true;
3432 run_again(sdata, assoc_data->timeout);
3433 } else {
3434 assoc_data->timeout =
3435 round_jiffies_up(jiffies +
3436 IEEE80211_ASSOC_TIMEOUT_LONG);
3437 assoc_data->timeout_started = true;
3438 run_again(sdata, assoc_data->timeout);
3439 }
3440
3441 return 0;
3442 }
3443
3444 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445 __le16 fc, bool acked)
3446 {
3447 struct ieee80211_local *local = sdata->local;
3448
3449 sdata->u.mgd.status_fc = fc;
3450 sdata->u.mgd.status_acked = acked;
3451 sdata->u.mgd.status_received = true;
3452
3453 ieee80211_queue_work(&local->hw, &sdata->work);
3454 }
3455
3456 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3457 {
3458 struct ieee80211_local *local = sdata->local;
3459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3460
3461 sdata_lock(sdata);
3462
3463 if (ifmgd->status_received) {
3464 __le16 fc = ifmgd->status_fc;
3465 bool status_acked = ifmgd->status_acked;
3466
3467 ifmgd->status_received = false;
3468 if (ifmgd->auth_data &&
3469 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470 if (status_acked) {
3471 ifmgd->auth_data->timeout =
3472 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3473 run_again(sdata, ifmgd->auth_data->timeout);
3474 } else {
3475 ifmgd->auth_data->timeout = jiffies - 1;
3476 }
3477 ifmgd->auth_data->timeout_started = true;
3478 } else if (ifmgd->assoc_data &&
3479 (ieee80211_is_assoc_req(fc) ||
3480 ieee80211_is_reassoc_req(fc))) {
3481 if (status_acked) {
3482 ifmgd->assoc_data->timeout =
3483 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3484 run_again(sdata, ifmgd->assoc_data->timeout);
3485 } else {
3486 ifmgd->assoc_data->timeout = jiffies - 1;
3487 }
3488 ifmgd->assoc_data->timeout_started = true;
3489 }
3490 }
3491
3492 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3493 time_after(jiffies, ifmgd->auth_data->timeout)) {
3494 if (ifmgd->auth_data->done) {
3495 /*
3496 * ok ... we waited for assoc but userspace didn't,
3497 * so let's just kill the auth data
3498 */
3499 ieee80211_destroy_auth_data(sdata, false);
3500 } else if (ieee80211_probe_auth(sdata)) {
3501 u8 bssid[ETH_ALEN];
3502
3503 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505 ieee80211_destroy_auth_data(sdata, false);
3506
3507 cfg80211_auth_timeout(sdata->dev, bssid);
3508 }
3509 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3510 run_again(sdata, ifmgd->auth_data->timeout);
3511
3512 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3513 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3514 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
3515 ieee80211_do_assoc(sdata)) {
3516 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
3517
3518 ieee80211_destroy_assoc_data(sdata, false);
3519 cfg80211_assoc_timeout(sdata->dev, bss);
3520 }
3521 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3522 run_again(sdata, ifmgd->assoc_data->timeout);
3523
3524 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
3525 ifmgd->associated) {
3526 u8 bssid[ETH_ALEN];
3527 int max_tries;
3528
3529 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3530
3531 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3532 max_tries = max_nullfunc_tries;
3533 else
3534 max_tries = max_probe_tries;
3535
3536 /* ACK received for nullfunc probing frame */
3537 if (!ifmgd->probe_send_count)
3538 ieee80211_reset_ap_probe(sdata);
3539 else if (ifmgd->nullfunc_failed) {
3540 if (ifmgd->probe_send_count < max_tries) {
3541 mlme_dbg(sdata,
3542 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3543 bssid, ifmgd->probe_send_count,
3544 max_tries);
3545 ieee80211_mgd_probe_ap_send(sdata);
3546 } else {
3547 mlme_dbg(sdata,
3548 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3549 bssid);
3550 ieee80211_sta_connection_lost(sdata, bssid,
3551 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3552 false);
3553 }
3554 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3555 run_again(sdata, ifmgd->probe_timeout);
3556 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3557 mlme_dbg(sdata,
3558 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3559 bssid, probe_wait_ms);
3560 ieee80211_sta_connection_lost(sdata, bssid,
3561 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3562 } else if (ifmgd->probe_send_count < max_tries) {
3563 mlme_dbg(sdata,
3564 "No probe response from AP %pM after %dms, try %d/%i\n",
3565 bssid, probe_wait_ms,
3566 ifmgd->probe_send_count, max_tries);
3567 ieee80211_mgd_probe_ap_send(sdata);
3568 } else {
3569 /*
3570 * We actually lost the connection ... or did we?
3571 * Let's make sure!
3572 */
3573 wiphy_debug(local->hw.wiphy,
3574 "%s: No probe response from AP %pM"
3575 " after %dms, disconnecting.\n",
3576 sdata->name,
3577 bssid, probe_wait_ms);
3578
3579 ieee80211_sta_connection_lost(sdata, bssid,
3580 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3581 }
3582 }
3583
3584 sdata_unlock(sdata);
3585 }
3586
3587 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3588 {
3589 struct ieee80211_sub_if_data *sdata =
3590 (struct ieee80211_sub_if_data *) data;
3591 struct ieee80211_local *local = sdata->local;
3592
3593 if (local->quiescing)
3594 return;
3595
3596 if (sdata->vif.csa_active)
3597 return;
3598
3599 sdata->u.mgd.connection_loss = false;
3600 ieee80211_queue_work(&sdata->local->hw,
3601 &sdata->u.mgd.beacon_connection_loss_work);
3602 }
3603
3604 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3605 {
3606 struct ieee80211_sub_if_data *sdata =
3607 (struct ieee80211_sub_if_data *) data;
3608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3609 struct ieee80211_local *local = sdata->local;
3610
3611 if (local->quiescing)
3612 return;
3613
3614 if (sdata->vif.csa_active)
3615 return;
3616
3617 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3618 }
3619
3620 static void ieee80211_sta_monitor_work(struct work_struct *work)
3621 {
3622 struct ieee80211_sub_if_data *sdata =
3623 container_of(work, struct ieee80211_sub_if_data,
3624 u.mgd.monitor_work);
3625
3626 ieee80211_mgd_probe_ap(sdata, false);
3627 }
3628
3629 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3630 {
3631 u32 flags;
3632
3633 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3634 __ieee80211_stop_poll(sdata);
3635
3636 /* let's probe the connection once */
3637 flags = sdata->local->hw.flags;
3638 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3639 ieee80211_queue_work(&sdata->local->hw,
3640 &sdata->u.mgd.monitor_work);
3641 /* and do all the other regular work too */
3642 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3643 }
3644 }
3645
3646 #ifdef CONFIG_PM
3647 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3648 {
3649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3650 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3651
3652 sdata_lock(sdata);
3653
3654 if (ifmgd->auth_data || ifmgd->assoc_data) {
3655 const u8 *bssid = ifmgd->auth_data ?
3656 ifmgd->auth_data->bss->bssid :
3657 ifmgd->assoc_data->bss->bssid;
3658
3659 /*
3660 * If we are trying to authenticate / associate while suspending,
3661 * cfg80211 won't know and won't actually abort those attempts,
3662 * thus we need to do that ourselves.
3663 */
3664 ieee80211_send_deauth_disassoc(sdata, bssid,
3665 IEEE80211_STYPE_DEAUTH,
3666 WLAN_REASON_DEAUTH_LEAVING,
3667 false, frame_buf);
3668 if (ifmgd->assoc_data)
3669 ieee80211_destroy_assoc_data(sdata, false);
3670 if (ifmgd->auth_data)
3671 ieee80211_destroy_auth_data(sdata, false);
3672 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3673 IEEE80211_DEAUTH_FRAME_LEN);
3674 }
3675
3676 sdata_unlock(sdata);
3677 }
3678
3679 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3680 {
3681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3682
3683 sdata_lock(sdata);
3684 if (!ifmgd->associated) {
3685 sdata_unlock(sdata);
3686 return;
3687 }
3688
3689 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3690 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3691 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3692 ieee80211_sta_connection_lost(sdata,
3693 ifmgd->associated->bssid,
3694 WLAN_REASON_UNSPECIFIED,
3695 true);
3696 sdata_unlock(sdata);
3697 return;
3698 }
3699 sdata_unlock(sdata);
3700 }
3701 #endif
3702
3703 /* interface setup */
3704 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3705 {
3706 struct ieee80211_if_managed *ifmgd;
3707
3708 ifmgd = &sdata->u.mgd;
3709 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3710 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3711 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3712 ieee80211_beacon_connection_loss_work);
3713 INIT_WORK(&ifmgd->csa_connection_drop_work,
3714 ieee80211_csa_connection_drop_work);
3715 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
3716 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3717 (unsigned long) sdata);
3718 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3719 (unsigned long) sdata);
3720 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3721 (unsigned long) sdata);
3722 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3723 (unsigned long) sdata);
3724
3725 ifmgd->flags = 0;
3726 ifmgd->powersave = sdata->wdev.ps;
3727 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3728 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3729 ifmgd->p2p_noa_index = -1;
3730
3731 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3732 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3733 else
3734 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3735 }
3736
3737 /* scan finished notification */
3738 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3739 {
3740 struct ieee80211_sub_if_data *sdata;
3741
3742 /* Restart STA timers */
3743 rcu_read_lock();
3744 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3745 if (ieee80211_sdata_running(sdata))
3746 ieee80211_restart_sta_timer(sdata);
3747 }
3748 rcu_read_unlock();
3749 }
3750
3751 int ieee80211_max_network_latency(struct notifier_block *nb,
3752 unsigned long data, void *dummy)
3753 {
3754 s32 latency_usec = (s32) data;
3755 struct ieee80211_local *local =
3756 container_of(nb, struct ieee80211_local,
3757 network_latency_notifier);
3758
3759 mutex_lock(&local->iflist_mtx);
3760 ieee80211_recalc_ps(local, latency_usec);
3761 mutex_unlock(&local->iflist_mtx);
3762
3763 return NOTIFY_OK;
3764 }
3765
3766 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3767 struct cfg80211_bss *cbss)
3768 {
3769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3770 const u8 *ht_cap_ie, *vht_cap_ie;
3771 const struct ieee80211_ht_cap *ht_cap;
3772 const struct ieee80211_vht_cap *vht_cap;
3773 u8 chains = 1;
3774
3775 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3776 return chains;
3777
3778 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3779 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3780 ht_cap = (void *)(ht_cap_ie + 2);
3781 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3782 /*
3783 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3784 * "Tx Unequal Modulation Supported" fields.
3785 */
3786 }
3787
3788 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3789 return chains;
3790
3791 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3792 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3793 u8 nss;
3794 u16 tx_mcs_map;
3795
3796 vht_cap = (void *)(vht_cap_ie + 2);
3797 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3798 for (nss = 8; nss > 0; nss--) {
3799 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3800 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3801 break;
3802 }
3803 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3804 chains = max(chains, nss);
3805 }
3806
3807 return chains;
3808 }
3809
3810 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3811 struct cfg80211_bss *cbss)
3812 {
3813 struct ieee80211_local *local = sdata->local;
3814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3815 const struct ieee80211_ht_operation *ht_oper = NULL;
3816 const struct ieee80211_vht_operation *vht_oper = NULL;
3817 struct ieee80211_supported_band *sband;
3818 struct cfg80211_chan_def chandef;
3819 int ret;
3820
3821 sband = local->hw.wiphy->bands[cbss->channel->band];
3822
3823 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3824 IEEE80211_STA_DISABLE_80P80MHZ |
3825 IEEE80211_STA_DISABLE_160MHZ);
3826
3827 rcu_read_lock();
3828
3829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3830 sband->ht_cap.ht_supported) {
3831 const u8 *ht_oper_ie, *ht_cap;
3832
3833 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3834 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3835 ht_oper = (void *)(ht_oper_ie + 2);
3836
3837 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3838 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3839 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3840 ht_oper = NULL;
3841 }
3842 }
3843
3844 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3845 sband->vht_cap.vht_supported) {
3846 const u8 *vht_oper_ie, *vht_cap;
3847
3848 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3849 WLAN_EID_VHT_OPERATION);
3850 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3851 vht_oper = (void *)(vht_oper_ie + 2);
3852 if (vht_oper && !ht_oper) {
3853 vht_oper = NULL;
3854 sdata_info(sdata,
3855 "AP advertised VHT without HT, disabling both\n");
3856 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3858 }
3859
3860 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3861 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3862 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3863 vht_oper = NULL;
3864 }
3865 }
3866
3867 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3868 cbss->channel,
3869 ht_oper, vht_oper,
3870 &chandef, false);
3871
3872 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3873 local->rx_chains);
3874
3875 rcu_read_unlock();
3876
3877 /* will change later if needed */
3878 sdata->smps_mode = IEEE80211_SMPS_OFF;
3879
3880 mutex_lock(&local->mtx);
3881 /*
3882 * If this fails (possibly due to channel context sharing
3883 * on incompatible channels, e.g. 80+80 and 160 sharing the
3884 * same control channel) try to use a smaller bandwidth.
3885 */
3886 ret = ieee80211_vif_use_channel(sdata, &chandef,
3887 IEEE80211_CHANCTX_SHARED);
3888
3889 /* don't downgrade for 5 and 10 MHz channels, though. */
3890 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3891 chandef.width == NL80211_CHAN_WIDTH_10)
3892 goto out;
3893
3894 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3895 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
3896 ret = ieee80211_vif_use_channel(sdata, &chandef,
3897 IEEE80211_CHANCTX_SHARED);
3898 }
3899 out:
3900 mutex_unlock(&local->mtx);
3901 return ret;
3902 }
3903
3904 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3905 struct cfg80211_bss *cbss, bool assoc)
3906 {
3907 struct ieee80211_local *local = sdata->local;
3908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3909 struct ieee80211_bss *bss = (void *)cbss->priv;
3910 struct sta_info *new_sta = NULL;
3911 bool have_sta = false;
3912 int err;
3913
3914 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3915 return -EINVAL;
3916
3917 if (assoc) {
3918 rcu_read_lock();
3919 have_sta = sta_info_get(sdata, cbss->bssid);
3920 rcu_read_unlock();
3921 }
3922
3923 if (!have_sta) {
3924 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3925 if (!new_sta)
3926 return -ENOMEM;
3927 }
3928 if (new_sta) {
3929 u32 rates = 0, basic_rates = 0;
3930 bool have_higher_than_11mbit;
3931 int min_rate = INT_MAX, min_rate_index = -1;
3932 struct ieee80211_chanctx_conf *chanctx_conf;
3933 struct ieee80211_supported_band *sband;
3934 const struct cfg80211_bss_ies *ies;
3935 int shift;
3936 u32 rate_flags;
3937
3938 sband = local->hw.wiphy->bands[cbss->channel->band];
3939
3940 err = ieee80211_prep_channel(sdata, cbss);
3941 if (err) {
3942 sta_info_free(local, new_sta);
3943 return -EINVAL;
3944 }
3945 shift = ieee80211_vif_get_shift(&sdata->vif);
3946
3947 rcu_read_lock();
3948 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3949 if (WARN_ON(!chanctx_conf)) {
3950 rcu_read_unlock();
3951 sta_info_free(local, new_sta);
3952 return -EINVAL;
3953 }
3954 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3955 rcu_read_unlock();
3956
3957 ieee80211_get_rates(sband, bss->supp_rates,
3958 bss->supp_rates_len,
3959 &rates, &basic_rates,
3960 &have_higher_than_11mbit,
3961 &min_rate, &min_rate_index,
3962 shift, rate_flags);
3963
3964 /*
3965 * This used to be a workaround for basic rates missing
3966 * in the association response frame. Now that we no
3967 * longer use the basic rates from there, it probably
3968 * doesn't happen any more, but keep the workaround so
3969 * in case some *other* APs are buggy in different ways
3970 * we can connect -- with a warning.
3971 */
3972 if (!basic_rates && min_rate_index >= 0) {
3973 sdata_info(sdata,
3974 "No basic rates, using min rate instead\n");
3975 basic_rates = BIT(min_rate_index);
3976 }
3977
3978 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3979 sdata->vif.bss_conf.basic_rates = basic_rates;
3980
3981 /* cf. IEEE 802.11 9.2.12 */
3982 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3983 have_higher_than_11mbit)
3984 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3985 else
3986 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3987
3988 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3989
3990 /* set timing information */
3991 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3992 rcu_read_lock();
3993 ies = rcu_dereference(cbss->beacon_ies);
3994 if (ies) {
3995 const u8 *tim_ie;
3996
3997 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3998 sdata->vif.bss_conf.sync_device_ts =
3999 bss->device_ts_beacon;
4000 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4001 ies->data, ies->len);
4002 if (tim_ie && tim_ie[1] >= 2)
4003 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4004 else
4005 sdata->vif.bss_conf.sync_dtim_count = 0;
4006 } else if (!(local->hw.flags &
4007 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4008 ies = rcu_dereference(cbss->proberesp_ies);
4009 /* must be non-NULL since beacon IEs were NULL */
4010 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4011 sdata->vif.bss_conf.sync_device_ts =
4012 bss->device_ts_presp;
4013 sdata->vif.bss_conf.sync_dtim_count = 0;
4014 } else {
4015 sdata->vif.bss_conf.sync_tsf = 0;
4016 sdata->vif.bss_conf.sync_device_ts = 0;
4017 sdata->vif.bss_conf.sync_dtim_count = 0;
4018 }
4019 rcu_read_unlock();
4020
4021 /* tell driver about BSSID, basic rates and timing */
4022 ieee80211_bss_info_change_notify(sdata,
4023 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4024 BSS_CHANGED_BEACON_INT);
4025
4026 if (assoc)
4027 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
4028
4029 err = sta_info_insert(new_sta);
4030 new_sta = NULL;
4031 if (err) {
4032 sdata_info(sdata,
4033 "failed to insert STA entry for the AP (error %d)\n",
4034 err);
4035 return err;
4036 }
4037 } else
4038 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
4039
4040 return 0;
4041 }
4042
4043 /* config hooks */
4044 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4045 struct cfg80211_auth_request *req)
4046 {
4047 struct ieee80211_local *local = sdata->local;
4048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049 struct ieee80211_mgd_auth_data *auth_data;
4050 u16 auth_alg;
4051 int err;
4052
4053 /* prepare auth data structure */
4054
4055 switch (req->auth_type) {
4056 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4057 auth_alg = WLAN_AUTH_OPEN;
4058 break;
4059 case NL80211_AUTHTYPE_SHARED_KEY:
4060 if (IS_ERR(local->wep_tx_tfm))
4061 return -EOPNOTSUPP;
4062 auth_alg = WLAN_AUTH_SHARED_KEY;
4063 break;
4064 case NL80211_AUTHTYPE_FT:
4065 auth_alg = WLAN_AUTH_FT;
4066 break;
4067 case NL80211_AUTHTYPE_NETWORK_EAP:
4068 auth_alg = WLAN_AUTH_LEAP;
4069 break;
4070 case NL80211_AUTHTYPE_SAE:
4071 auth_alg = WLAN_AUTH_SAE;
4072 break;
4073 default:
4074 return -EOPNOTSUPP;
4075 }
4076
4077 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4078 req->ie_len, GFP_KERNEL);
4079 if (!auth_data)
4080 return -ENOMEM;
4081
4082 auth_data->bss = req->bss;
4083
4084 if (req->sae_data_len >= 4) {
4085 __le16 *pos = (__le16 *) req->sae_data;
4086 auth_data->sae_trans = le16_to_cpu(pos[0]);
4087 auth_data->sae_status = le16_to_cpu(pos[1]);
4088 memcpy(auth_data->data, req->sae_data + 4,
4089 req->sae_data_len - 4);
4090 auth_data->data_len += req->sae_data_len - 4;
4091 }
4092
4093 if (req->ie && req->ie_len) {
4094 memcpy(&auth_data->data[auth_data->data_len],
4095 req->ie, req->ie_len);
4096 auth_data->data_len += req->ie_len;
4097 }
4098
4099 if (req->key && req->key_len) {
4100 auth_data->key_len = req->key_len;
4101 auth_data->key_idx = req->key_idx;
4102 memcpy(auth_data->key, req->key, req->key_len);
4103 }
4104
4105 auth_data->algorithm = auth_alg;
4106
4107 /* try to authenticate/probe */
4108
4109 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4110 ifmgd->assoc_data) {
4111 err = -EBUSY;
4112 goto err_free;
4113 }
4114
4115 if (ifmgd->auth_data)
4116 ieee80211_destroy_auth_data(sdata, false);
4117
4118 /* prep auth_data so we don't go into idle on disassoc */
4119 ifmgd->auth_data = auth_data;
4120
4121 if (ifmgd->associated) {
4122 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4123
4124 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4125 WLAN_REASON_UNSPECIFIED,
4126 false, frame_buf);
4127
4128 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4129 sizeof(frame_buf));
4130 }
4131
4132 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4133
4134 err = ieee80211_prep_connection(sdata, req->bss, false);
4135 if (err)
4136 goto err_clear;
4137
4138 err = ieee80211_probe_auth(sdata);
4139 if (err) {
4140 sta_info_destroy_addr(sdata, req->bss->bssid);
4141 goto err_clear;
4142 }
4143
4144 /* hold our own reference */
4145 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4146 return 0;
4147
4148 err_clear:
4149 memset(ifmgd->bssid, 0, ETH_ALEN);
4150 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4151 ifmgd->auth_data = NULL;
4152 err_free:
4153 kfree(auth_data);
4154 return err;
4155 }
4156
4157 static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4158 const u8 *wmm_param, int len)
4159 {
4160 const u8 *pos;
4161 size_t left;
4162
4163 if (len < 8)
4164 return false;
4165
4166 if (wmm_param[5] != 1 /* version */)
4167 return false;
4168
4169 pos = wmm_param + 8;
4170 left = len - 8;
4171
4172 for (; left >= 4; left -= 4, pos += 4) {
4173 u8 aifsn = pos[0] & 0x0f;
4174 u8 ecwmin = pos[1] & 0x0f;
4175 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4176 int aci = (pos[0] >> 5) & 0x03;
4177
4178 if (aifsn < 2) {
4179 sdata_info(sdata,
4180 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4181 aifsn, aci);
4182 return false;
4183 }
4184 if (ecwmin > ecwmax) {
4185 sdata_info(sdata,
4186 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4187 ecwmin, ecwmax, aci);
4188 return false;
4189 }
4190 }
4191
4192 return true;
4193 }
4194
4195 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4196 struct cfg80211_assoc_request *req)
4197 {
4198 struct ieee80211_local *local = sdata->local;
4199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4200 struct ieee80211_bss *bss = (void *)req->bss->priv;
4201 struct ieee80211_mgd_assoc_data *assoc_data;
4202 const struct cfg80211_bss_ies *beacon_ies;
4203 struct ieee80211_supported_band *sband;
4204 const u8 *ssidie, *ht_ie, *vht_ie;
4205 int i, err;
4206
4207 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4208 if (!assoc_data)
4209 return -ENOMEM;
4210
4211 rcu_read_lock();
4212 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4213 if (!ssidie) {
4214 rcu_read_unlock();
4215 kfree(assoc_data);
4216 return -EINVAL;
4217 }
4218 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4219 assoc_data->ssid_len = ssidie[1];
4220 rcu_read_unlock();
4221
4222 if (ifmgd->associated) {
4223 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4224
4225 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4226 WLAN_REASON_UNSPECIFIED,
4227 false, frame_buf);
4228
4229 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4230 sizeof(frame_buf));
4231 }
4232
4233 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4234 err = -EBUSY;
4235 goto err_free;
4236 }
4237
4238 if (ifmgd->assoc_data) {
4239 err = -EBUSY;
4240 goto err_free;
4241 }
4242
4243 if (ifmgd->auth_data) {
4244 bool match;
4245
4246 /* keep sta info, bssid if matching */
4247 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4248 ieee80211_destroy_auth_data(sdata, match);
4249 }
4250
4251 /* prepare assoc data */
4252
4253 ifmgd->beacon_crc_valid = false;
4254
4255 assoc_data->wmm = bss->wmm_used &&
4256 (local->hw.queues >= IEEE80211_NUM_ACS);
4257 if (assoc_data->wmm) {
4258 /* try to check validity of WMM params IE */
4259 const struct cfg80211_bss_ies *ies;
4260 const u8 *wp, *start, *end;
4261
4262 rcu_read_lock();
4263 ies = rcu_dereference(req->bss->ies);
4264 start = ies->data;
4265 end = start + ies->len;
4266
4267 while (true) {
4268 wp = cfg80211_find_vendor_ie(
4269 WLAN_OUI_MICROSOFT,
4270 WLAN_OUI_TYPE_MICROSOFT_WMM,
4271 start, end - start);
4272 if (!wp)
4273 break;
4274 start = wp + wp[1] + 2;
4275 /* if this IE is too short, try the next */
4276 if (wp[1] <= 4)
4277 continue;
4278 /* if this IE is WMM params, we found what we wanted */
4279 if (wp[6] == 1)
4280 break;
4281 }
4282
4283 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4284 wp[1] - 2)) {
4285 assoc_data->wmm = false;
4286 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4287 }
4288 rcu_read_unlock();
4289 }
4290
4291 /*
4292 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4293 * We still associate in non-HT mode (11a/b/g) if any one of these
4294 * ciphers is configured as pairwise.
4295 * We can set this to true for non-11n hardware, that'll be checked
4296 * separately along with the peer capabilities.
4297 */
4298 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4299 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4300 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4301 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4302 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4303 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4304 netdev_info(sdata->dev,
4305 "disabling HT/VHT due to WEP/TKIP use\n");
4306 }
4307 }
4308
4309 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4310 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4311 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4312 }
4313
4314 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4315 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4316
4317 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4318 sband = local->hw.wiphy->bands[req->bss->channel->band];
4319 if (!sband->ht_cap.ht_supported ||
4320 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4321 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4322 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4323 if (!bss->wmm_used &&
4324 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4325 netdev_info(sdata->dev,
4326 "disabling HT as WMM/QoS is not supported by the AP\n");
4327 }
4328
4329 /* disable VHT if we don't support it or the AP doesn't use WMM */
4330 if (!sband->vht_cap.vht_supported ||
4331 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4332 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
4333 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4334 if (!bss->wmm_used &&
4335 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
4336 netdev_info(sdata->dev,
4337 "disabling VHT as WMM/QoS is not supported by the AP\n");
4338 }
4339
4340 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4341 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4342 sizeof(ifmgd->ht_capa_mask));
4343
4344 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4345 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4346 sizeof(ifmgd->vht_capa_mask));
4347
4348 if (req->ie && req->ie_len) {
4349 memcpy(assoc_data->ie, req->ie, req->ie_len);
4350 assoc_data->ie_len = req->ie_len;
4351 }
4352
4353 assoc_data->bss = req->bss;
4354
4355 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4356 if (ifmgd->powersave)
4357 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4358 else
4359 sdata->smps_mode = IEEE80211_SMPS_OFF;
4360 } else
4361 sdata->smps_mode = ifmgd->req_smps;
4362
4363 assoc_data->capability = req->bss->capability;
4364 assoc_data->supp_rates = bss->supp_rates;
4365 assoc_data->supp_rates_len = bss->supp_rates_len;
4366
4367 rcu_read_lock();
4368 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4369 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4370 assoc_data->ap_ht_param =
4371 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4372 else
4373 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4374 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4375 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4376 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4377 sizeof(struct ieee80211_vht_cap));
4378 else
4379 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4380 rcu_read_unlock();
4381
4382 if (bss->wmm_used && bss->uapsd_supported &&
4383 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4384 sdata->wmm_acm != 0xff) {
4385 assoc_data->uapsd = true;
4386 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4387 } else {
4388 assoc_data->uapsd = false;
4389 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4390 }
4391
4392 if (req->prev_bssid)
4393 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4394
4395 if (req->use_mfp) {
4396 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4397 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4398 } else {
4399 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4400 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4401 }
4402
4403 if (req->crypto.control_port)
4404 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4405 else
4406 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4407
4408 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4409 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4410 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4411 sdata->vif.type);
4412
4413 /* kick off associate process */
4414
4415 ifmgd->assoc_data = assoc_data;
4416 ifmgd->dtim_period = 0;
4417 ifmgd->have_beacon = false;
4418
4419 err = ieee80211_prep_connection(sdata, req->bss, true);
4420 if (err)
4421 goto err_clear;
4422
4423 rcu_read_lock();
4424 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4425
4426 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4427 !beacon_ies) {
4428 /*
4429 * Wait up to one beacon interval ...
4430 * should this be more if we miss one?
4431 */
4432 sdata_info(sdata, "waiting for beacon from %pM\n",
4433 ifmgd->bssid);
4434 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4435 assoc_data->timeout_started = true;
4436 assoc_data->need_beacon = true;
4437 } else if (beacon_ies) {
4438 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4439 beacon_ies->data,
4440 beacon_ies->len);
4441 u8 dtim_count = 0;
4442
4443 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4444 const struct ieee80211_tim_ie *tim;
4445 tim = (void *)(tim_ie + 2);
4446 ifmgd->dtim_period = tim->dtim_period;
4447 dtim_count = tim->dtim_count;
4448 }
4449 ifmgd->have_beacon = true;
4450 assoc_data->timeout = jiffies;
4451 assoc_data->timeout_started = true;
4452
4453 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4454 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4455 sdata->vif.bss_conf.sync_device_ts =
4456 bss->device_ts_beacon;
4457 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4458 }
4459 } else {
4460 assoc_data->timeout = jiffies;
4461 assoc_data->timeout_started = true;
4462 }
4463 rcu_read_unlock();
4464
4465 run_again(sdata, assoc_data->timeout);
4466
4467 if (bss->corrupt_data) {
4468 char *corrupt_type = "data";
4469 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4470 if (bss->corrupt_data &
4471 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4472 corrupt_type = "beacon and probe response";
4473 else
4474 corrupt_type = "beacon";
4475 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4476 corrupt_type = "probe response";
4477 sdata_info(sdata, "associating with AP with corrupt %s\n",
4478 corrupt_type);
4479 }
4480
4481 return 0;
4482 err_clear:
4483 memset(ifmgd->bssid, 0, ETH_ALEN);
4484 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4485 ifmgd->assoc_data = NULL;
4486 err_free:
4487 kfree(assoc_data);
4488 return err;
4489 }
4490
4491 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4492 struct cfg80211_deauth_request *req)
4493 {
4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4495 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4496 bool tx = !req->local_state_change;
4497
4498 if (ifmgd->auth_data &&
4499 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4500 sdata_info(sdata,
4501 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4502 req->bssid, req->reason_code,
4503 ieee80211_get_reason_code_string(req->reason_code));
4504
4505 drv_mgd_prepare_tx(sdata->local, sdata);
4506 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4507 IEEE80211_STYPE_DEAUTH,
4508 req->reason_code, tx,
4509 frame_buf);
4510 ieee80211_destroy_auth_data(sdata, false);
4511 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4512 IEEE80211_DEAUTH_FRAME_LEN);
4513
4514 return 0;
4515 }
4516
4517 if (ifmgd->associated &&
4518 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4519 sdata_info(sdata,
4520 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4521 req->bssid, req->reason_code,
4522 ieee80211_get_reason_code_string(req->reason_code));
4523
4524 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4525 req->reason_code, tx, frame_buf);
4526 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4527 IEEE80211_DEAUTH_FRAME_LEN);
4528 return 0;
4529 }
4530
4531 return -ENOTCONN;
4532 }
4533
4534 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4535 struct cfg80211_disassoc_request *req)
4536 {
4537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4538 u8 bssid[ETH_ALEN];
4539 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4540
4541 /*
4542 * cfg80211 should catch this ... but it's racy since
4543 * we can receive a disassoc frame, process it, hand it
4544 * to cfg80211 while that's in a locked section already
4545 * trying to tell us that the user wants to disconnect.
4546 */
4547 if (ifmgd->associated != req->bss)
4548 return -ENOLINK;
4549
4550 sdata_info(sdata,
4551 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4552 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
4553
4554 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4555 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4556 req->reason_code, !req->local_state_change,
4557 frame_buf);
4558
4559 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4560 IEEE80211_DEAUTH_FRAME_LEN);
4561
4562 return 0;
4563 }
4564
4565 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4566 {
4567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4568
4569 /*
4570 * Make sure some work items will not run after this,
4571 * they will not do anything but might not have been
4572 * cancelled when disconnecting.
4573 */
4574 cancel_work_sync(&ifmgd->monitor_work);
4575 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4576 cancel_work_sync(&ifmgd->request_smps_work);
4577 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4578 cancel_work_sync(&ifmgd->chswitch_work);
4579
4580 sdata_lock(sdata);
4581 if (ifmgd->assoc_data) {
4582 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
4583 ieee80211_destroy_assoc_data(sdata, false);
4584 cfg80211_assoc_timeout(sdata->dev, bss);
4585 }
4586 if (ifmgd->auth_data)
4587 ieee80211_destroy_auth_data(sdata, false);
4588 del_timer_sync(&ifmgd->timer);
4589 sdata_unlock(sdata);
4590 }
4591
4592 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4593 enum nl80211_cqm_rssi_threshold_event rssi_event,
4594 gfp_t gfp)
4595 {
4596 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4597
4598 trace_api_cqm_rssi_notify(sdata, rssi_event);
4599
4600 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4601 }
4602 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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