1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * BSS client mode implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11 * Copyright (C) 2018 - 2024 Intel Corporation
12 */
13
14 #include <linux/delay.h>
15 #include <linux/fips.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/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 #include "fils_aead.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2)
41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
44 #define IEEE80211_ASSOC_MAX_TRIES 3
45
46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100)
47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00
48
49 static int max_nullfunc_tries = 2;
50 module_param(max_nullfunc_tries, int, 0644);
51 MODULE_PARM_DESC(max_nullfunc_tries,
52 "Maximum nullfunc tx tries before disconnecting (reason 4).");
53
54 static int max_probe_tries = 5;
55 module_param(max_probe_tries, int, 0644);
56 MODULE_PARM_DESC(max_probe_tries,
57 "Maximum probe tries before disconnecting (reason 4).");
58
59 /*
60 * Beacon loss timeout is calculated as N frames times the
61 * advertised beacon interval. This may need to be somewhat
62 * higher than what hardware might detect to account for
63 * delays in the host processing frames. But since we also
64 * probe on beacon miss before declaring the connection lost
65 * default to what we want.
66 */
67 static int beacon_loss_count = 7;
68 module_param(beacon_loss_count, int, 0644);
69 MODULE_PARM_DESC(beacon_loss_count,
70 "Number of beacon intervals before we decide beacon was lost.");
71
72 /*
73 * Time the connection can be idle before we probe
74 * it to see if we can still talk to the AP.
75 */
76 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
77 /*
78 * Time we wait for a probe response after sending
79 * a probe request because of beacon loss or for
80 * checking the connection still works.
81 */
82 static int probe_wait_ms = 500;
83 module_param(probe_wait_ms, int, 0644);
84 MODULE_PARM_DESC(probe_wait_ms,
85 "Maximum time(ms) to wait for probe response"
86 " before disconnecting (reason 4).");
87
88 /*
89 * How many Beacon frames need to have been used in average signal strength
90 * before starting to indicate signal change events.
91 */
92 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
93
94 /*
95 * Extract from the given disabled subchannel bitmap (raw format
96 * from the EHT Operation Element) the bits for the subchannel
97 * we're using right now.
98 */
99 static u16
ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation * eht_oper,struct cfg80211_chan_def * chandef,u16 bitmap)100 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper,
101 struct cfg80211_chan_def *chandef, u16 bitmap)
102 {
103 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
104 struct cfg80211_chan_def ap_chandef = *chandef;
105 u32 ap_center_freq, local_center_freq;
106 u32 ap_bw, local_bw;
107 int ap_start_freq, local_start_freq;
108 u16 shift, mask;
109
110 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) ||
111 !(eht_oper->params &
112 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT))
113 return 0;
114
115 /* set 160/320 supported to get the full AP definition */
116 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
117 true, true, &ap_chandef);
118 ap_center_freq = ap_chandef.center_freq1;
119 ap_bw = 20 * BIT(u8_get_bits(info->control,
120 IEEE80211_EHT_OPER_CHAN_WIDTH));
121 ap_start_freq = ap_center_freq - ap_bw / 2;
122 local_center_freq = chandef->center_freq1;
123 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width));
124 local_start_freq = local_center_freq - local_bw / 2;
125 shift = (local_start_freq - ap_start_freq) / 20;
126 mask = BIT(local_bw / 20) - 1;
127
128 return (bitmap >> shift) & mask;
129 }
130
131 /*
132 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a
133 * valid bitmap.
134 */
135 static void
ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data * link,const struct ieee80211_eht_operation * eht_oper,u16 bitmap,u64 * changed)136 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link,
137 const struct ieee80211_eht_operation *eht_oper,
138 u16 bitmap, u64 *changed)
139 {
140 struct cfg80211_chan_def *chandef = &link->conf->chandef;
141 struct ieee80211_local *local = link->sdata->local;
142 u16 extracted;
143 u64 _changed = 0;
144
145 if (!changed)
146 changed = &_changed;
147
148 while (chandef->width > NL80211_CHAN_WIDTH_40) {
149 extracted =
150 ieee80211_extract_dis_subch_bmap(eht_oper, chandef,
151 bitmap);
152
153 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
154 chandef) &&
155 !(bitmap && ieee80211_hw_check(&local->hw,
156 DISALLOW_PUNCTURING)))
157 break;
158 link->u.mgd.conn_flags |=
159 ieee80211_chandef_downgrade(chandef);
160 *changed |= BSS_CHANGED_BANDWIDTH;
161 }
162
163 if (chandef->width <= NL80211_CHAN_WIDTH_40)
164 extracted = 0;
165
166 if (link->conf->eht_puncturing != extracted) {
167 link->conf->eht_puncturing = extracted;
168 *changed |= BSS_CHANGED_EHT_PUNCTURING;
169 }
170 }
171
172 /*
173 * We can have multiple work items (and connection probing)
174 * scheduling this timer, but we need to take care to only
175 * reschedule it when it should fire _earlier_ than it was
176 * asked for before, or if it's not pending right now. This
177 * function ensures that. Note that it then is required to
178 * run this function for all timeouts after the first one
179 * has happened -- the work that runs from this timer will
180 * do that.
181 */
run_again(struct ieee80211_sub_if_data * sdata,unsigned long timeout)182 static void run_again(struct ieee80211_sub_if_data *sdata,
183 unsigned long timeout)
184 {
185 lockdep_assert_wiphy(sdata->local->hw.wiphy);
186
187 if (!timer_pending(&sdata->u.mgd.timer) ||
188 time_before(timeout, sdata->u.mgd.timer.expires))
189 mod_timer(&sdata->u.mgd.timer, timeout);
190 }
191
ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data * sdata)192 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
193 {
194 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
195 return;
196
197 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
198 return;
199
200 mod_timer(&sdata->u.mgd.bcn_mon_timer,
201 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
202 }
203
ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data * sdata)204 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
205 {
206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
207
208 if (unlikely(!ifmgd->associated))
209 return;
210
211 if (ifmgd->probe_send_count)
212 ifmgd->probe_send_count = 0;
213
214 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
215 return;
216
217 mod_timer(&ifmgd->conn_mon_timer,
218 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
219 }
220
ecw2cw(int ecw)221 static int ecw2cw(int ecw)
222 {
223 return (1 << ecw) - 1;
224 }
225
226 static ieee80211_conn_flags_t
ieee80211_determine_chantype(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,ieee80211_conn_flags_t conn_flags,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,u32 vht_cap_info,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,struct cfg80211_chan_def * chandef,bool tracking)227 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
228 struct ieee80211_link_data *link,
229 ieee80211_conn_flags_t conn_flags,
230 struct ieee80211_supported_band *sband,
231 struct ieee80211_channel *channel,
232 u32 vht_cap_info,
233 const struct ieee80211_ht_operation *ht_oper,
234 const struct ieee80211_vht_operation *vht_oper,
235 const struct ieee80211_he_operation *he_oper,
236 const struct ieee80211_eht_operation *eht_oper,
237 const struct ieee80211_s1g_oper_ie *s1g_oper,
238 struct cfg80211_chan_def *chandef, bool tracking)
239 {
240 struct cfg80211_chan_def vht_chandef;
241 struct ieee80211_sta_ht_cap sta_ht_cap;
242 ieee80211_conn_flags_t ret;
243 u32 ht_cfreq;
244
245 memset(chandef, 0, sizeof(struct cfg80211_chan_def));
246 chandef->chan = channel;
247 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
248 chandef->center_freq1 = channel->center_freq;
249 chandef->freq1_offset = channel->freq_offset;
250
251 if (channel->band == NL80211_BAND_6GHZ) {
252 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
253 chandef)) {
254 mlme_dbg(sdata,
255 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
256 ret = IEEE80211_CONN_DISABLE_HT |
257 IEEE80211_CONN_DISABLE_VHT |
258 IEEE80211_CONN_DISABLE_HE |
259 IEEE80211_CONN_DISABLE_EHT;
260 } else {
261 ret = 0;
262 }
263 vht_chandef = *chandef;
264 goto out;
265 } else if (sband->band == NL80211_BAND_S1GHZ) {
266 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
267 sdata_info(sdata,
268 "Missing S1G Operation Element? Trying operating == primary\n");
269 chandef->width = ieee80211_s1g_channel_width(channel);
270 }
271
272 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ |
273 IEEE80211_CONN_DISABLE_VHT |
274 IEEE80211_CONN_DISABLE_80P80MHZ |
275 IEEE80211_CONN_DISABLE_160MHZ;
276 goto out;
277 }
278
279 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
280 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
281
282 if (!ht_oper || !sta_ht_cap.ht_supported) {
283 mlme_dbg(sdata, "HT operation missing / HT not supported\n");
284 ret = IEEE80211_CONN_DISABLE_HT |
285 IEEE80211_CONN_DISABLE_VHT |
286 IEEE80211_CONN_DISABLE_HE |
287 IEEE80211_CONN_DISABLE_EHT;
288 goto out;
289 }
290
291 chandef->width = NL80211_CHAN_WIDTH_20;
292
293 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
294 channel->band);
295 /* check that channel matches the right operating channel */
296 if (!tracking && channel->center_freq != ht_cfreq) {
297 /*
298 * It's possible that some APs are confused here;
299 * Netgear WNDR3700 sometimes reports 4 higher than
300 * the actual channel in association responses, but
301 * since we look at probe response/beacon data here
302 * it should be OK.
303 */
304 sdata_info(sdata,
305 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
306 channel->center_freq, ht_cfreq,
307 ht_oper->primary_chan, channel->band);
308 ret = IEEE80211_CONN_DISABLE_HT |
309 IEEE80211_CONN_DISABLE_VHT |
310 IEEE80211_CONN_DISABLE_HE |
311 IEEE80211_CONN_DISABLE_EHT;
312 goto out;
313 }
314
315 /* check 40 MHz support, if we have it */
316 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
317 ieee80211_chandef_ht_oper(ht_oper, chandef);
318 } else {
319 mlme_dbg(sdata, "40 MHz not supported\n");
320 /* 40 MHz (and 80 MHz) must be supported for VHT */
321 ret = IEEE80211_CONN_DISABLE_VHT;
322 /* also mark 40 MHz disabled */
323 ret |= IEEE80211_CONN_DISABLE_40MHZ;
324 goto out;
325 }
326
327 if (!vht_oper || !sband->vht_cap.vht_supported) {
328 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
329 ret = IEEE80211_CONN_DISABLE_VHT;
330 goto out;
331 }
332
333 vht_chandef = *chandef;
334 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) &&
335 he_oper &&
336 (le32_to_cpu(he_oper->he_oper_params) &
337 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
338 struct ieee80211_vht_operation he_oper_vht_cap;
339
340 /*
341 * Set only first 3 bytes (other 2 aren't used in
342 * ieee80211_chandef_vht_oper() anyway)
343 */
344 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
345 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
346
347 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
348 &he_oper_vht_cap, ht_oper,
349 &vht_chandef)) {
350 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE))
351 sdata_info(sdata,
352 "HE AP VHT information is invalid, disabling HE\n");
353 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
354 goto out;
355 }
356 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
357 vht_cap_info,
358 vht_oper, ht_oper,
359 &vht_chandef)) {
360 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
361 sdata_info(sdata,
362 "AP VHT information is invalid, disabling VHT\n");
363 ret = IEEE80211_CONN_DISABLE_VHT;
364 goto out;
365 }
366
367 if (!cfg80211_chandef_valid(&vht_chandef)) {
368 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
369 sdata_info(sdata,
370 "AP VHT information is invalid, disabling VHT\n");
371 ret = IEEE80211_CONN_DISABLE_VHT;
372 goto out;
373 }
374
375 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
376 ret = 0;
377 goto out;
378 }
379
380 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
381 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
382 sdata_info(sdata,
383 "AP VHT information doesn't match HT, disabling VHT\n");
384 ret = IEEE80211_CONN_DISABLE_VHT;
385 goto out;
386 }
387
388 *chandef = vht_chandef;
389
390 /*
391 * handle the case that the EHT operation indicates that it holds EHT
392 * operation information (in case that the channel width differs from
393 * the channel width reported in HT/VHT/HE).
394 */
395 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
396 struct cfg80211_chan_def eht_chandef = *chandef;
397
398 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
399 eht_chandef.width ==
400 NL80211_CHAN_WIDTH_160,
401 false, &eht_chandef);
402
403 if (!cfg80211_chandef_valid(&eht_chandef)) {
404 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
405 sdata_info(sdata,
406 "AP EHT information is invalid, disabling EHT\n");
407 ret = IEEE80211_CONN_DISABLE_EHT;
408 goto out;
409 }
410
411 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
412 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
413 sdata_info(sdata,
414 "AP EHT information is incompatible, disabling EHT\n");
415 ret = IEEE80211_CONN_DISABLE_EHT;
416 goto out;
417 }
418
419 *chandef = eht_chandef;
420 }
421
422 ret = 0;
423
424 out:
425 /*
426 * When tracking the current AP, don't do any further checks if the
427 * new chandef is identical to the one we're currently using for the
428 * connection. This keeps us from playing ping-pong with regulatory,
429 * without it the following can happen (for example):
430 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
431 * - AP advertises regdom US
432 * - CRDA loads regdom US with 80 MHz prohibited (old database)
433 * - the code below detects an unsupported channel, downgrades, and
434 * we disconnect from the AP in the caller
435 * - disconnect causes CRDA to reload world regdomain and the game
436 * starts anew.
437 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
438 *
439 * It seems possible that there are still scenarios with CSA or real
440 * bandwidth changes where a this could happen, but those cases are
441 * less common and wouldn't completely prevent using the AP.
442 */
443 if (tracking &&
444 cfg80211_chandef_identical(chandef, &link->conf->chandef))
445 return ret;
446
447 /* don't print the message below for VHT mismatch if VHT is disabled */
448 if (ret & IEEE80211_CONN_DISABLE_VHT)
449 vht_chandef = *chandef;
450
451 /*
452 * Ignore the DISABLED flag when we're already connected and only
453 * tracking the APs beacon for bandwidth changes - otherwise we
454 * might get disconnected here if we connect to an AP, update our
455 * regulatory information based on the AP's country IE and the
456 * information we have is wrong/outdated and disables the channel
457 * that we're actually using for the connection to the AP.
458 */
459 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
460 tracking ? 0 :
461 IEEE80211_CHAN_DISABLED)) {
462 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
463 ret = IEEE80211_CONN_DISABLE_HT |
464 IEEE80211_CONN_DISABLE_VHT |
465 IEEE80211_CONN_DISABLE_HE |
466 IEEE80211_CONN_DISABLE_EHT;
467 break;
468 }
469
470 ret |= ieee80211_chandef_downgrade(chandef);
471 }
472
473 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
474 IEEE80211_CHAN_NO_HE))
475 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
476
477 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
478 IEEE80211_CHAN_NO_EHT))
479 ret |= IEEE80211_CONN_DISABLE_EHT;
480
481 if (chandef->width != vht_chandef.width && !tracking)
482 sdata_info(sdata,
483 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
484
485 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
486 return ret;
487 }
488
ieee80211_config_bw(struct ieee80211_link_data * link,const struct ieee80211_ht_cap * ht_cap,const struct ieee80211_vht_cap * vht_cap,const struct ieee80211_ht_operation * ht_oper,const struct ieee80211_vht_operation * vht_oper,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,const struct ieee80211_s1g_oper_ie * s1g_oper,const u8 * bssid,u64 * changed)489 static int ieee80211_config_bw(struct ieee80211_link_data *link,
490 const struct ieee80211_ht_cap *ht_cap,
491 const struct ieee80211_vht_cap *vht_cap,
492 const struct ieee80211_ht_operation *ht_oper,
493 const struct ieee80211_vht_operation *vht_oper,
494 const struct ieee80211_he_operation *he_oper,
495 const struct ieee80211_eht_operation *eht_oper,
496 const struct ieee80211_s1g_oper_ie *s1g_oper,
497 const u8 *bssid, u64 *changed)
498 {
499 struct ieee80211_sub_if_data *sdata = link->sdata;
500 struct ieee80211_local *local = sdata->local;
501 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
502 struct ieee80211_channel *chan = link->conf->chandef.chan;
503 struct ieee80211_supported_band *sband =
504 local->hw.wiphy->bands[chan->band];
505 struct cfg80211_chan_def chandef;
506 u16 ht_opmode;
507 ieee80211_conn_flags_t flags;
508 u32 vht_cap_info = 0;
509 int ret;
510
511 /* if HT was/is disabled, don't track any bandwidth changes */
512 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper)
513 return 0;
514
515 /* don't check VHT if we associated as non-VHT station */
516 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
517 vht_oper = NULL;
518
519 /* don't check HE if we associated as non-HE station */
520 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE ||
521 !ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) {
522 he_oper = NULL;
523 eht_oper = NULL;
524 }
525
526 /* don't check EHT if we associated as non-EHT station */
527 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT ||
528 !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif))
529 eht_oper = NULL;
530
531 /*
532 * if bss configuration changed store the new one -
533 * this may be applicable even if channel is identical
534 */
535 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
536 if (link->conf->ht_operation_mode != ht_opmode) {
537 *changed |= BSS_CHANGED_HT;
538 link->conf->ht_operation_mode = ht_opmode;
539 }
540
541 if (vht_cap)
542 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
543
544 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
545 flags = ieee80211_determine_chantype(sdata, link,
546 link->u.mgd.conn_flags,
547 sband, chan, vht_cap_info,
548 ht_oper, vht_oper,
549 he_oper, eht_oper,
550 s1g_oper, &chandef, true);
551
552 /*
553 * Downgrade the new channel if we associated with restricted
554 * capabilities. For example, if we associated as a 20 MHz STA
555 * to a 40 MHz AP (due to regulatory, capabilities or config
556 * reasons) then switching to a 40 MHz channel now won't do us
557 * any good -- we couldn't use it with the AP.
558 */
559 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
560 chandef.width == NL80211_CHAN_WIDTH_80P80)
561 flags |= ieee80211_chandef_downgrade(&chandef);
562 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
563 chandef.width == NL80211_CHAN_WIDTH_160)
564 flags |= ieee80211_chandef_downgrade(&chandef);
565 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ &&
566 chandef.width > NL80211_CHAN_WIDTH_20)
567 flags |= ieee80211_chandef_downgrade(&chandef);
568
569 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef))
570 return 0;
571
572 link_info(link,
573 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
574 link->u.mgd.bssid, chandef.chan->center_freq,
575 chandef.chan->freq_offset, chandef.width,
576 chandef.center_freq1, chandef.freq1_offset,
577 chandef.center_freq2);
578
579 if (flags != (link->u.mgd.conn_flags &
580 (IEEE80211_CONN_DISABLE_HT |
581 IEEE80211_CONN_DISABLE_VHT |
582 IEEE80211_CONN_DISABLE_HE |
583 IEEE80211_CONN_DISABLE_EHT |
584 IEEE80211_CONN_DISABLE_40MHZ |
585 IEEE80211_CONN_DISABLE_80P80MHZ |
586 IEEE80211_CONN_DISABLE_160MHZ |
587 IEEE80211_CONN_DISABLE_320MHZ)) ||
588 !cfg80211_chandef_valid(&chandef)) {
589 sdata_info(sdata,
590 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
591 link->u.mgd.bssid, flags, ifmgd->flags);
592 return -EINVAL;
593 }
594
595 ret = ieee80211_link_change_bandwidth(link, &chandef, changed);
596
597 if (ret) {
598 sdata_info(sdata,
599 "AP %pM changed bandwidth to incompatible one - disconnect\n",
600 link->u.mgd.bssid);
601 return ret;
602 }
603
604 cfg80211_schedule_channels_check(&sdata->wdev);
605 return 0;
606 }
607
608 /* frame sending functions */
609
ieee80211_add_ht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u8 ap_ht_param,struct ieee80211_supported_band * sband,struct ieee80211_channel * channel,enum ieee80211_smps_mode smps,ieee80211_conn_flags_t conn_flags)610 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
611 struct sk_buff *skb, u8 ap_ht_param,
612 struct ieee80211_supported_band *sband,
613 struct ieee80211_channel *channel,
614 enum ieee80211_smps_mode smps,
615 ieee80211_conn_flags_t conn_flags)
616 {
617 u8 *pos;
618 u32 flags = channel->flags;
619 u16 cap;
620 struct ieee80211_sta_ht_cap ht_cap;
621
622 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
623
624 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
625 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
626
627 /* determine capability flags */
628 cap = ht_cap.cap;
629
630 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
631 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
632 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
633 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
634 cap &= ~IEEE80211_HT_CAP_SGI_40;
635 }
636 break;
637 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
638 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
639 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
640 cap &= ~IEEE80211_HT_CAP_SGI_40;
641 }
642 break;
643 }
644
645 /*
646 * If 40 MHz was disabled associate as though we weren't
647 * capable of 40 MHz -- some broken APs will never fall
648 * back to trying to transmit in 20 MHz.
649 */
650 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) {
651 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
652 cap &= ~IEEE80211_HT_CAP_SGI_40;
653 }
654
655 /* set SM PS mode properly */
656 cap &= ~IEEE80211_HT_CAP_SM_PS;
657 switch (smps) {
658 case IEEE80211_SMPS_AUTOMATIC:
659 case IEEE80211_SMPS_NUM_MODES:
660 WARN_ON(1);
661 fallthrough;
662 case IEEE80211_SMPS_OFF:
663 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
664 IEEE80211_HT_CAP_SM_PS_SHIFT;
665 break;
666 case IEEE80211_SMPS_STATIC:
667 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
668 IEEE80211_HT_CAP_SM_PS_SHIFT;
669 break;
670 case IEEE80211_SMPS_DYNAMIC:
671 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
672 IEEE80211_HT_CAP_SM_PS_SHIFT;
673 break;
674 }
675
676 /* reserve and fill IE */
677 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
678 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
679 }
680
681 /* This function determines vht capability flags for the association
682 * and builds the IE.
683 * Note - the function returns true to own the MU-MIMO capability
684 */
ieee80211_add_vht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband,struct ieee80211_vht_cap * ap_vht_cap,ieee80211_conn_flags_t conn_flags)685 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
686 struct sk_buff *skb,
687 struct ieee80211_supported_band *sband,
688 struct ieee80211_vht_cap *ap_vht_cap,
689 ieee80211_conn_flags_t conn_flags)
690 {
691 struct ieee80211_local *local = sdata->local;
692 u8 *pos;
693 u32 cap;
694 struct ieee80211_sta_vht_cap vht_cap;
695 u32 mask, ap_bf_sts, our_bf_sts;
696 bool mu_mimo_owner = false;
697
698 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
699
700 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
701 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
702
703 /* determine capability flags */
704 cap = vht_cap.cap;
705
706 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) {
707 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
708
709 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
710 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
711 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
712 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
713 }
714
715 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) {
716 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
717 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
718 }
719
720 /*
721 * Some APs apparently get confused if our capabilities are better
722 * than theirs, so restrict what we advertise in the assoc request.
723 */
724 if (!(ap_vht_cap->vht_cap_info &
725 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
726 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
727 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
728 else if (!(ap_vht_cap->vht_cap_info &
729 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
730 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
731
732 /*
733 * If some other vif is using the MU-MIMO capability we cannot associate
734 * using MU-MIMO - this will lead to contradictions in the group-id
735 * mechanism.
736 * Ownership is defined since association request, in order to avoid
737 * simultaneous associations with MU-MIMO.
738 */
739 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
740 bool disable_mu_mimo = false;
741 struct ieee80211_sub_if_data *other;
742
743 list_for_each_entry_rcu(other, &local->interfaces, list) {
744 if (other->vif.bss_conf.mu_mimo_owner) {
745 disable_mu_mimo = true;
746 break;
747 }
748 }
749 if (disable_mu_mimo)
750 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
751 else
752 mu_mimo_owner = true;
753 }
754
755 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
756
757 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
758 our_bf_sts = cap & mask;
759
760 if (ap_bf_sts < our_bf_sts) {
761 cap &= ~mask;
762 cap |= ap_bf_sts;
763 }
764
765 /* reserve and fill IE */
766 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
767 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
768
769 return mu_mimo_owner;
770 }
771
772 /* This function determines HE capability flags for the association
773 * and builds the IE.
774 */
ieee80211_add_he_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband,enum ieee80211_smps_mode smps_mode,ieee80211_conn_flags_t conn_flags)775 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
776 struct sk_buff *skb,
777 struct ieee80211_supported_band *sband,
778 enum ieee80211_smps_mode smps_mode,
779 ieee80211_conn_flags_t conn_flags)
780 {
781 u8 *pos, *pre_he_pos;
782 const struct ieee80211_sta_he_cap *he_cap;
783 u8 he_cap_size;
784
785 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
786 if (WARN_ON(!he_cap))
787 return;
788
789 /* get a max size estimate */
790 he_cap_size =
791 2 + 1 + sizeof(he_cap->he_cap_elem) +
792 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
793 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
794 he_cap->he_cap_elem.phy_cap_info);
795 pos = skb_put(skb, he_cap_size);
796 pre_he_pos = pos;
797 pos = ieee80211_ie_build_he_cap(conn_flags,
798 pos, he_cap, pos + he_cap_size);
799 /* trim excess if any */
800 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
801
802 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb);
803 }
804
ieee80211_add_eht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband)805 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
806 struct sk_buff *skb,
807 struct ieee80211_supported_band *sband)
808 {
809 u8 *pos;
810 const struct ieee80211_sta_he_cap *he_cap;
811 const struct ieee80211_sta_eht_cap *eht_cap;
812 u8 eht_cap_size;
813
814 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
815 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
816
817 /*
818 * EHT capabilities element is only added if the HE capabilities element
819 * was added so assume that 'he_cap' is valid and don't check it.
820 */
821 if (WARN_ON(!he_cap || !eht_cap))
822 return;
823
824 eht_cap_size =
825 2 + 1 + sizeof(eht_cap->eht_cap_elem) +
826 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
827 &eht_cap->eht_cap_elem,
828 false) +
829 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
830 eht_cap->eht_cap_elem.phy_cap_info);
831 pos = skb_put(skb, eht_cap_size);
832 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size,
833 false);
834 }
835
ieee80211_assoc_add_rates(struct sk_buff * skb,enum nl80211_chan_width width,struct ieee80211_supported_band * sband,struct ieee80211_mgd_assoc_data * assoc_data)836 static void ieee80211_assoc_add_rates(struct sk_buff *skb,
837 enum nl80211_chan_width width,
838 struct ieee80211_supported_band *sband,
839 struct ieee80211_mgd_assoc_data *assoc_data)
840 {
841 unsigned int rates_len, supp_rates_len;
842 u32 rates = 0;
843 int i, count;
844 u8 *pos;
845
846 if (assoc_data->supp_rates_len) {
847 /*
848 * Get all rates supported by the device and the AP as
849 * some APs don't like getting a superset of their rates
850 * in the association request (e.g. D-Link DAP 1353 in
851 * b-only mode)...
852 */
853 rates_len = ieee80211_parse_bitrates(width, sband,
854 assoc_data->supp_rates,
855 assoc_data->supp_rates_len,
856 &rates);
857 } else {
858 /*
859 * In case AP not provide any supported rates information
860 * before association, we send information element(s) with
861 * all rates that we support.
862 */
863 rates_len = sband->n_bitrates;
864 for (i = 0; i < sband->n_bitrates; i++)
865 rates |= BIT(i);
866 }
867
868 supp_rates_len = rates_len;
869 if (supp_rates_len > 8)
870 supp_rates_len = 8;
871
872 pos = skb_put(skb, supp_rates_len + 2);
873 *pos++ = WLAN_EID_SUPP_RATES;
874 *pos++ = supp_rates_len;
875
876 count = 0;
877 for (i = 0; i < sband->n_bitrates; i++) {
878 if (BIT(i) & rates) {
879 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
880 *pos++ = (u8)rate;
881 if (++count == 8)
882 break;
883 }
884 }
885
886 if (rates_len > count) {
887 pos = skb_put(skb, rates_len - count + 2);
888 *pos++ = WLAN_EID_EXT_SUPP_RATES;
889 *pos++ = rates_len - count;
890
891 for (i++; i < sband->n_bitrates; i++) {
892 if (BIT(i) & rates) {
893 int rate;
894
895 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
896 *pos++ = (u8)rate;
897 }
898 }
899 }
900 }
901
ieee80211_add_before_ht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)902 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
903 const u8 *elems,
904 size_t elems_len,
905 size_t offset)
906 {
907 size_t noffset;
908
909 static const u8 before_ht[] = {
910 WLAN_EID_SSID,
911 WLAN_EID_SUPP_RATES,
912 WLAN_EID_EXT_SUPP_RATES,
913 WLAN_EID_PWR_CAPABILITY,
914 WLAN_EID_SUPPORTED_CHANNELS,
915 WLAN_EID_RSN,
916 WLAN_EID_QOS_CAPA,
917 WLAN_EID_RRM_ENABLED_CAPABILITIES,
918 WLAN_EID_MOBILITY_DOMAIN,
919 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
920 WLAN_EID_RIC_DATA, /* reassoc only */
921 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
922 };
923 static const u8 after_ric[] = {
924 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
925 WLAN_EID_HT_CAPABILITY,
926 WLAN_EID_BSS_COEX_2040,
927 /* luckily this is almost always there */
928 WLAN_EID_EXT_CAPABILITY,
929 WLAN_EID_QOS_TRAFFIC_CAPA,
930 WLAN_EID_TIM_BCAST_REQ,
931 WLAN_EID_INTERWORKING,
932 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
933 WLAN_EID_VHT_CAPABILITY,
934 WLAN_EID_OPMODE_NOTIF,
935 };
936
937 if (!elems_len)
938 return offset;
939
940 noffset = ieee80211_ie_split_ric(elems, elems_len,
941 before_ht,
942 ARRAY_SIZE(before_ht),
943 after_ric,
944 ARRAY_SIZE(after_ric),
945 offset);
946 skb_put_data(skb, elems + offset, noffset - offset);
947
948 return noffset;
949 }
950
ieee80211_add_before_vht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)951 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
952 const u8 *elems,
953 size_t elems_len,
954 size_t offset)
955 {
956 static const u8 before_vht[] = {
957 /*
958 * no need to list the ones split off before HT
959 * or generated here
960 */
961 WLAN_EID_BSS_COEX_2040,
962 WLAN_EID_EXT_CAPABILITY,
963 WLAN_EID_QOS_TRAFFIC_CAPA,
964 WLAN_EID_TIM_BCAST_REQ,
965 WLAN_EID_INTERWORKING,
966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
967 };
968 size_t noffset;
969
970 if (!elems_len)
971 return offset;
972
973 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
974 noffset = ieee80211_ie_split(elems, elems_len,
975 before_vht, ARRAY_SIZE(before_vht),
976 offset);
977 skb_put_data(skb, elems + offset, noffset - offset);
978
979 return noffset;
980 }
981
ieee80211_add_before_he_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)982 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
983 const u8 *elems,
984 size_t elems_len,
985 size_t offset)
986 {
987 static const u8 before_he[] = {
988 /*
989 * no need to list the ones split off before VHT
990 * or generated here
991 */
992 WLAN_EID_OPMODE_NOTIF,
993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
994 /* 11ai elements */
995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
996 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
1000 /* TODO: add 11ah/11aj/11ak elements */
1001 };
1002 size_t noffset;
1003
1004 if (!elems_len)
1005 return offset;
1006
1007 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
1008 noffset = ieee80211_ie_split(elems, elems_len,
1009 before_he, ARRAY_SIZE(before_he),
1010 offset);
1011 skb_put_data(skb, elems + offset, noffset - offset);
1012
1013 return noffset;
1014 }
1015
1016 #define PRESENT_ELEMS_MAX 8
1017 #define PRESENT_ELEM_EXT_OFFS 0x100
1018
1019 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1020 struct sk_buff *skb, u16 capab,
1021 const struct element *ext_capa,
1022 const u16 *present_elems);
1023
ieee80211_assoc_link_elems(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u16 * capab,const struct element * ext_capa,const u8 * extra_elems,size_t extra_elems_len,unsigned int link_id,struct ieee80211_link_data * link,u16 * present_elems)1024 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
1025 struct sk_buff *skb, u16 *capab,
1026 const struct element *ext_capa,
1027 const u8 *extra_elems,
1028 size_t extra_elems_len,
1029 unsigned int link_id,
1030 struct ieee80211_link_data *link,
1031 u16 *present_elems)
1032 {
1033 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1035 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1036 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1037 struct ieee80211_channel *chan = cbss->channel;
1038 const struct ieee80211_sband_iftype_data *iftd;
1039 struct ieee80211_local *local = sdata->local;
1040 struct ieee80211_supported_band *sband;
1041 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
1042 struct ieee80211_chanctx_conf *chanctx_conf;
1043 enum ieee80211_smps_mode smps_mode;
1044 u16 orig_capab = *capab;
1045 size_t offset = 0;
1046 int present_elems_len = 0;
1047 u8 *pos;
1048 int i;
1049
1050 #define ADD_PRESENT_ELEM(id) do { \
1051 /* need a last for termination - we use 0 == SSID */ \
1052 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \
1053 present_elems[present_elems_len++] = (id); \
1054 } while (0)
1055 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
1056
1057 if (link)
1058 smps_mode = link->smps_mode;
1059 else if (sdata->u.mgd.powersave)
1060 smps_mode = IEEE80211_SMPS_DYNAMIC;
1061 else
1062 smps_mode = IEEE80211_SMPS_OFF;
1063
1064 if (link) {
1065 /*
1066 * 5/10 MHz scenarios are only viable without MLO, in which
1067 * case this pointer should be used ... All of this is a bit
1068 * unclear though, not sure this even works at all.
1069 */
1070 rcu_read_lock();
1071 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1072 if (chanctx_conf)
1073 width = chanctx_conf->def.width;
1074 rcu_read_unlock();
1075 }
1076
1077 sband = local->hw.wiphy->bands[chan->band];
1078 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1079
1080 if (sband->band == NL80211_BAND_2GHZ) {
1081 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1082 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
1083 }
1084
1085 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1086 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1087 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
1088
1089 if (sband->band != NL80211_BAND_S1GHZ)
1090 ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
1091
1092 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
1093 *capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1094 struct cfg80211_chan_def chandef = {
1095 .width = width,
1096 .chan = chan,
1097 };
1098
1099 pos = skb_put(skb, 4);
1100 *pos++ = WLAN_EID_PWR_CAPABILITY;
1101 *pos++ = 2;
1102 *pos++ = 0; /* min tx power */
1103 /* max tx power */
1104 *pos++ = ieee80211_chandef_max_power(&chandef);
1105 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1106 }
1107
1108 /*
1109 * Per spec, we shouldn't include the list of channels if we advertise
1110 * support for extended channel switching, but we've always done that;
1111 * (for now?) apply this restriction only on the (new) 6 GHz band.
1112 */
1113 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1114 (sband->band != NL80211_BAND_6GHZ ||
1115 !ext_capa || ext_capa->datalen < 1 ||
1116 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1117 /* TODO: get this in reg domain format */
1118 pos = skb_put(skb, 2 * sband->n_channels + 2);
1119 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1120 *pos++ = 2 * sband->n_channels;
1121 for (i = 0; i < sband->n_channels; i++) {
1122 int cf = sband->channels[i].center_freq;
1123
1124 *pos++ = ieee80211_frequency_to_channel(cf);
1125 *pos++ = 1; /* one channel in the subband*/
1126 }
1127 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1128 }
1129
1130 /* if present, add any custom IEs that go before HT */
1131 offset = ieee80211_add_before_ht_elems(skb, extra_elems,
1132 extra_elems_len,
1133 offset);
1134
1135 if (sband->band != NL80211_BAND_6GHZ &&
1136 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) {
1137 ieee80211_add_ht_ie(sdata, skb,
1138 assoc_data->link[link_id].ap_ht_param,
1139 sband, chan, smps_mode,
1140 assoc_data->link[link_id].conn_flags);
1141 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1142 }
1143
1144 /* if present, add any custom IEs that go before VHT */
1145 offset = ieee80211_add_before_vht_elems(skb, extra_elems,
1146 extra_elems_len,
1147 offset);
1148
1149 if (sband->band != NL80211_BAND_6GHZ &&
1150 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
1151 bool mu_mimo_owner =
1152 ieee80211_add_vht_ie(sdata, skb, sband,
1153 &assoc_data->link[link_id].ap_vht_cap,
1154 assoc_data->link[link_id].conn_flags);
1155
1156 if (link)
1157 link->conf->mu_mimo_owner = mu_mimo_owner;
1158 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1159 }
1160
1161 /*
1162 * If AP doesn't support HT, mark HE and EHT as disabled.
1163 * If on the 5GHz band, make sure it supports VHT.
1164 */
1165 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT ||
1166 (sband->band == NL80211_BAND_5GHZ &&
1167 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT))
1168 assoc_data->link[link_id].conn_flags |=
1169 IEEE80211_CONN_DISABLE_HE |
1170 IEEE80211_CONN_DISABLE_EHT;
1171
1172 /* if present, add any custom IEs that go before HE */
1173 offset = ieee80211_add_before_he_elems(skb, extra_elems,
1174 extra_elems_len,
1175 offset);
1176
1177 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) {
1178 ieee80211_add_he_ie(sdata, skb, sband, smps_mode,
1179 assoc_data->link[link_id].conn_flags);
1180 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1181 }
1182
1183 /*
1184 * careful - need to know about all the present elems before
1185 * calling ieee80211_assoc_add_ml_elem(), so add this one if
1186 * we're going to put it after the ML element
1187 */
1188 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1189 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1190
1191 if (link_id == assoc_data->assoc_link_id)
1192 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
1193 present_elems);
1194
1195 /* crash if somebody gets it wrong */
1196 present_elems = NULL;
1197
1198 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1199 ieee80211_add_eht_ie(sdata, skb, sband);
1200
1201 if (sband->band == NL80211_BAND_S1GHZ) {
1202 ieee80211_add_aid_request_ie(sdata, skb);
1203 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1204 }
1205
1206 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1207 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1208
1209 if (link)
1210 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags;
1211
1212 return offset;
1213 }
1214
ieee80211_add_non_inheritance_elem(struct sk_buff * skb,const u16 * outer,const u16 * inner)1215 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1216 const u16 *outer,
1217 const u16 *inner)
1218 {
1219 unsigned int skb_len = skb->len;
1220 bool at_extension = false;
1221 bool added = false;
1222 int i, j;
1223 u8 *len, *list_len = NULL;
1224
1225 skb_put_u8(skb, WLAN_EID_EXTENSION);
1226 len = skb_put(skb, 1);
1227 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1228
1229 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1230 u16 elem = outer[i];
1231 bool have_inner = false;
1232
1233 /* should at least be sorted in the sense of normal -> ext */
1234 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1235
1236 /* switch to extension list */
1237 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1238 at_extension = true;
1239 if (!list_len)
1240 skb_put_u8(skb, 0);
1241 list_len = NULL;
1242 }
1243
1244 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1245 if (elem == inner[j]) {
1246 have_inner = true;
1247 break;
1248 }
1249 }
1250
1251 if (have_inner)
1252 continue;
1253
1254 if (!list_len) {
1255 list_len = skb_put(skb, 1);
1256 *list_len = 0;
1257 }
1258 *list_len += 1;
1259 skb_put_u8(skb, (u8)elem);
1260 added = true;
1261 }
1262
1263 /* if we added a list but no extension list, make a zero-len one */
1264 if (added && (!at_extension || !list_len))
1265 skb_put_u8(skb, 0);
1266
1267 /* if nothing added remove extension element completely */
1268 if (!added)
1269 skb_trim(skb, skb_len);
1270 else
1271 *len = skb->len - skb_len - 2;
1272 }
1273
ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u16 capab,const struct element * ext_capa,const u16 * outer_present_elems)1274 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1275 struct sk_buff *skb, u16 capab,
1276 const struct element *ext_capa,
1277 const u16 *outer_present_elems)
1278 {
1279 struct ieee80211_local *local = sdata->local;
1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1281 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1282 struct ieee80211_multi_link_elem *ml_elem;
1283 struct ieee80211_mle_basic_common_info *common;
1284 const struct wiphy_iftype_ext_capab *ift_ext_capa;
1285 __le16 eml_capa = 0, mld_capa_ops = 0;
1286 unsigned int link_id;
1287 u8 *ml_elem_len;
1288 void *capab_pos;
1289
1290 if (!ieee80211_vif_is_mld(&sdata->vif))
1291 return;
1292
1293 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1294 ieee80211_vif_type_p2p(&sdata->vif));
1295 if (ift_ext_capa) {
1296 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1297 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1298 }
1299
1300 skb_put_u8(skb, WLAN_EID_EXTENSION);
1301 ml_elem_len = skb_put(skb, 1);
1302 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1303 ml_elem = skb_put(skb, sizeof(*ml_elem));
1304 ml_elem->control =
1305 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1306 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1307 common = skb_put(skb, sizeof(*common));
1308 common->len = sizeof(*common) +
1309 2; /* MLD capa/ops */
1310 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1311
1312 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1313 if (eml_capa &
1314 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1315 IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1316 common->len += 2; /* EML capabilities */
1317 ml_elem->control |=
1318 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1319 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1320 }
1321 /* need indication from userspace to support this */
1322 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1324
1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1327 const u8 *extra_elems;
1328 size_t extra_elems_len;
1329 size_t extra_used;
1330 u8 *subelem_len = NULL;
1331 __le16 ctrl;
1332
1333 if (!assoc_data->link[link_id].bss ||
1334 link_id == assoc_data->assoc_link_id)
1335 continue;
1336
1337 extra_elems = assoc_data->link[link_id].elems;
1338 extra_elems_len = assoc_data->link[link_id].elems_len;
1339
1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1341 subelem_len = skb_put(skb, 1);
1342
1343 ctrl = cpu_to_le16(link_id |
1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1346 skb_put_data(skb, &ctrl, sizeof(ctrl));
1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1348 skb_put_data(skb, assoc_data->link[link_id].addr,
1349 ETH_ALEN);
1350 /*
1351 * Now add the contents of the (re)association request,
1352 * but the "listen interval" and "current AP address"
1353 * (if applicable) are skipped. So we only have
1354 * the capability field (remember the position and fill
1355 * later), followed by the elements added below by
1356 * calling ieee80211_assoc_link_elems().
1357 */
1358 capab_pos = skb_put(skb, 2);
1359
1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1361 ext_capa,
1362 extra_elems,
1363 extra_elems_len,
1364 link_id, NULL,
1365 link_present_elems);
1366 if (extra_elems)
1367 skb_put_data(skb, extra_elems + extra_used,
1368 extra_elems_len - extra_used);
1369
1370 put_unaligned_le16(capab, capab_pos);
1371
1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1373 link_present_elems);
1374
1375 ieee80211_fragment_element(skb, subelem_len,
1376 IEEE80211_MLE_SUBELEM_FRAGMENT);
1377 }
1378
1379 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT);
1380 }
1381
ieee80211_send_assoc(struct ieee80211_sub_if_data * sdata)1382 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1383 {
1384 struct ieee80211_local *local = sdata->local;
1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1387 struct ieee80211_link_data *link;
1388 struct sk_buff *skb;
1389 struct ieee80211_mgmt *mgmt;
1390 u8 *pos, qos_info, *ie_start;
1391 size_t offset, noffset;
1392 u16 capab = 0, link_capab;
1393 __le16 listen_int;
1394 struct element *ext_capa = NULL;
1395 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1396 struct ieee80211_prep_tx_info info = {};
1397 unsigned int link_id, n_links = 0;
1398 u16 present_elems[PRESENT_ELEMS_MAX] = {};
1399 void *capab_pos;
1400 size_t size;
1401 int ret;
1402
1403 /* we know it's writable, cast away the const */
1404 if (assoc_data->ie_len)
1405 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1406 assoc_data->ie,
1407 assoc_data->ie_len);
1408
1409 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1410
1411 size = local->hw.extra_tx_headroom +
1412 sizeof(*mgmt) + /* bit too much but doesn't matter */
1413 2 + assoc_data->ssid_len + /* SSID */
1414 assoc_data->ie_len + /* extra IEs */
1415 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1416 9; /* WMM */
1417
1418 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1419 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1420 const struct ieee80211_sband_iftype_data *iftd;
1421 struct ieee80211_supported_band *sband;
1422
1423 if (!cbss)
1424 continue;
1425
1426 sband = local->hw.wiphy->bands[cbss->channel->band];
1427
1428 n_links++;
1429 /* add STA profile elements length */
1430 size += assoc_data->link[link_id].elems_len;
1431 /* and supported rates length */
1432 size += 4 + sband->n_bitrates;
1433 /* supported channels */
1434 size += 2 + 2 * sband->n_channels;
1435
1436 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1437 if (iftd)
1438 size += iftd->vendor_elems.len;
1439
1440 /* power capability */
1441 size += 4;
1442
1443 /* HT, VHT, HE, EHT */
1444 size += 2 + sizeof(struct ieee80211_ht_cap);
1445 size += 2 + sizeof(struct ieee80211_vht_cap);
1446 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1447 sizeof(struct ieee80211_he_mcs_nss_supp) +
1448 IEEE80211_HE_PPE_THRES_MAX_LEN;
1449
1450 if (sband->band == NL80211_BAND_6GHZ)
1451 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1452
1453 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1454 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1455 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1456
1457 /* non-inheritance element */
1458 size += 2 + 2 + PRESENT_ELEMS_MAX;
1459
1460 /* should be the same across all BSSes */
1461 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1462 capab |= WLAN_CAPABILITY_PRIVACY;
1463 }
1464
1465 if (ieee80211_vif_is_mld(&sdata->vif)) {
1466 /* consider the multi-link element with STA profile */
1467 size += sizeof(struct ieee80211_multi_link_elem);
1468 /* max common info field in basic multi-link element */
1469 size += sizeof(struct ieee80211_mle_basic_common_info) +
1470 2 + /* capa & op */
1471 2; /* EML capa */
1472
1473 /*
1474 * The capability elements were already considered above;
1475 * note this over-estimates a bit because there's no
1476 * STA profile for the assoc link.
1477 */
1478 size += (n_links - 1) *
1479 (1 + 1 + /* subelement ID/length */
1480 2 + /* STA control */
1481 1 + ETH_ALEN + 2 /* STA Info field */);
1482 }
1483
1484 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1485 if (WARN_ON(!link))
1486 return -EINVAL;
1487
1488 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1489 return -EINVAL;
1490
1491 skb = alloc_skb(size, GFP_KERNEL);
1492 if (!skb)
1493 return -ENOMEM;
1494
1495 skb_reserve(skb, local->hw.extra_tx_headroom);
1496
1497 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1498 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1499
1500 /* Set MBSSID support for HE AP if needed */
1501 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1502 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
1503 ext_capa && ext_capa->datalen >= 3)
1504 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1505
1506 mgmt = skb_put_zero(skb, 24);
1507 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1508 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1509 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1510
1511 listen_int = cpu_to_le16(assoc_data->s1g ?
1512 ieee80211_encode_usf(local->hw.conf.listen_interval) :
1513 local->hw.conf.listen_interval);
1514 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1515 skb_put(skb, 10);
1516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1517 IEEE80211_STYPE_REASSOC_REQ);
1518 capab_pos = &mgmt->u.reassoc_req.capab_info;
1519 mgmt->u.reassoc_req.listen_interval = listen_int;
1520 memcpy(mgmt->u.reassoc_req.current_ap,
1521 assoc_data->prev_ap_addr, ETH_ALEN);
1522 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1523 } else {
1524 skb_put(skb, 4);
1525 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1526 IEEE80211_STYPE_ASSOC_REQ);
1527 capab_pos = &mgmt->u.assoc_req.capab_info;
1528 mgmt->u.assoc_req.listen_interval = listen_int;
1529 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1530 }
1531
1532 /* SSID */
1533 pos = skb_put(skb, 2 + assoc_data->ssid_len);
1534 ie_start = pos;
1535 *pos++ = WLAN_EID_SSID;
1536 *pos++ = assoc_data->ssid_len;
1537 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1538
1539 /*
1540 * This bit is technically reserved, so it shouldn't matter for either
1541 * the AP or us, but it also means we shouldn't set it. However, we've
1542 * always set it in the past, and apparently some EHT APs check that
1543 * we don't set it. To avoid interoperability issues with old APs that
1544 * for some reason check it and want it to be set, set the bit for all
1545 * pre-EHT connections as we used to do.
1546 */
1547 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)
1548 capab |= WLAN_CAPABILITY_ESS;
1549
1550 /* add the elements for the assoc (main) link */
1551 link_capab = capab;
1552 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1553 ext_capa,
1554 assoc_data->ie,
1555 assoc_data->ie_len,
1556 assoc_data->assoc_link_id, link,
1557 present_elems);
1558 put_unaligned_le16(link_capab, capab_pos);
1559
1560 /* if present, add any custom non-vendor IEs */
1561 if (assoc_data->ie_len) {
1562 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1563 assoc_data->ie_len,
1564 offset);
1565 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1566 offset = noffset;
1567 }
1568
1569 if (assoc_data->wmm) {
1570 if (assoc_data->uapsd) {
1571 qos_info = ifmgd->uapsd_queues;
1572 qos_info |= (ifmgd->uapsd_max_sp_len <<
1573 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1574 } else {
1575 qos_info = 0;
1576 }
1577
1578 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1579 }
1580
1581 /* add any remaining custom (i.e. vendor specific here) IEs */
1582 if (assoc_data->ie_len) {
1583 noffset = assoc_data->ie_len;
1584 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1585 }
1586
1587 if (assoc_data->fils_kek_len) {
1588 ret = fils_encrypt_assoc_req(skb, assoc_data);
1589 if (ret < 0) {
1590 dev_kfree_skb(skb);
1591 return ret;
1592 }
1593 }
1594
1595 pos = skb_tail_pointer(skb);
1596 kfree(ifmgd->assoc_req_ies);
1597 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1598 if (!ifmgd->assoc_req_ies) {
1599 dev_kfree_skb(skb);
1600 return -ENOMEM;
1601 }
1602
1603 ifmgd->assoc_req_ies_len = pos - ie_start;
1604
1605 info.link_id = assoc_data->assoc_link_id;
1606 drv_mgd_prepare_tx(local, sdata, &info);
1607
1608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1609 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1610 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1611 IEEE80211_TX_INTFL_MLME_CONN_TX;
1612 ieee80211_tx_skb(sdata, skb);
1613
1614 return 0;
1615 }
1616
ieee80211_send_pspoll(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1617 void ieee80211_send_pspoll(struct ieee80211_local *local,
1618 struct ieee80211_sub_if_data *sdata)
1619 {
1620 struct ieee80211_pspoll *pspoll;
1621 struct sk_buff *skb;
1622
1623 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1624 if (!skb)
1625 return;
1626
1627 pspoll = (struct ieee80211_pspoll *) skb->data;
1628 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1629
1630 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1631 ieee80211_tx_skb(sdata, skb);
1632 }
1633
ieee80211_send_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool powersave)1634 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1635 struct ieee80211_sub_if_data *sdata,
1636 bool powersave)
1637 {
1638 struct sk_buff *skb;
1639 struct ieee80211_hdr_3addr *nullfunc;
1640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1641
1642 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
1643 !ieee80211_hw_check(&local->hw,
1644 DOESNT_SUPPORT_QOS_NDP));
1645 if (!skb)
1646 return;
1647
1648 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1649 if (powersave)
1650 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1651
1652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1653 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1654
1655 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1656 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1657
1658 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1659 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1660
1661 ieee80211_tx_skb(sdata, skb);
1662 }
1663
ieee80211_send_4addr_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1664 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1665 struct ieee80211_sub_if_data *sdata)
1666 {
1667 struct sk_buff *skb;
1668 struct ieee80211_hdr *nullfunc;
1669 __le16 fc;
1670
1671 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1672 return;
1673
1674 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1675 if (!skb)
1676 return;
1677
1678 skb_reserve(skb, local->hw.extra_tx_headroom);
1679
1680 nullfunc = skb_put_zero(skb, 30);
1681 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1682 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1683 nullfunc->frame_control = fc;
1684 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1685 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1686 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1687 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1688
1689 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1690 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1691 ieee80211_tx_skb(sdata, skb);
1692 }
1693
1694 /* spectrum management related things */
ieee80211_chswitch_work(struct wiphy * wiphy,struct wiphy_work * work)1695 static void ieee80211_chswitch_work(struct wiphy *wiphy,
1696 struct wiphy_work *work)
1697 {
1698 struct ieee80211_link_data *link =
1699 container_of(work, struct ieee80211_link_data,
1700 u.mgd.chswitch_work.work);
1701 struct ieee80211_sub_if_data *sdata = link->sdata;
1702 struct ieee80211_local *local = sdata->local;
1703 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1704 int ret;
1705
1706 if (!ieee80211_sdata_running(sdata))
1707 return;
1708
1709 lockdep_assert_wiphy(local->hw.wiphy);
1710
1711 if (!ifmgd->associated)
1712 return;
1713
1714 if (!link->conf->csa_active)
1715 return;
1716
1717 /*
1718 * using reservation isn't immediate as it may be deferred until later
1719 * with multi-vif. once reservation is complete it will re-schedule the
1720 * work with no reserved_chanctx so verify chandef to check if it
1721 * completed successfully
1722 */
1723
1724 if (link->reserved_chanctx) {
1725 /*
1726 * with multi-vif csa driver may call ieee80211_csa_finish()
1727 * many times while waiting for other interfaces to use their
1728 * reservations
1729 */
1730 if (link->reserved_ready)
1731 return;
1732
1733 ret = ieee80211_link_use_reserved_context(link);
1734 if (ret) {
1735 sdata_info(sdata,
1736 "failed to use reserved channel context, disconnecting (err=%d)\n",
1737 ret);
1738 wiphy_work_queue(sdata->local->hw.wiphy,
1739 &ifmgd->csa_connection_drop_work);
1740 }
1741 return;
1742 }
1743
1744 if (!cfg80211_chandef_identical(&link->conf->chandef,
1745 &link->csa_chandef)) {
1746 sdata_info(sdata,
1747 "failed to finalize channel switch, disconnecting\n");
1748 wiphy_work_queue(sdata->local->hw.wiphy,
1749 &ifmgd->csa_connection_drop_work);
1750 return;
1751 }
1752
1753 link->u.mgd.csa_waiting_bcn = true;
1754
1755 ieee80211_sta_reset_beacon_monitor(sdata);
1756 ieee80211_sta_reset_conn_monitor(sdata);
1757 }
1758
ieee80211_chswitch_post_beacon(struct ieee80211_link_data * link)1759 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
1760 {
1761 struct ieee80211_sub_if_data *sdata = link->sdata;
1762 struct ieee80211_local *local = sdata->local;
1763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1764 int ret;
1765
1766 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1767
1768 WARN_ON(!link->conf->csa_active);
1769
1770 if (link->csa_block_tx) {
1771 ieee80211_wake_vif_queues(local, sdata,
1772 IEEE80211_QUEUE_STOP_REASON_CSA);
1773 link->csa_block_tx = false;
1774 }
1775
1776 link->conf->csa_active = false;
1777 link->u.mgd.csa_waiting_bcn = false;
1778 /*
1779 * If the CSA IE is still present on the beacon after the switch,
1780 * we need to consider it as a new CSA (possibly to self).
1781 */
1782 link->u.mgd.beacon_crc_valid = false;
1783
1784 ret = drv_post_channel_switch(link);
1785 if (ret) {
1786 sdata_info(sdata,
1787 "driver post channel switch failed, disconnecting\n");
1788 wiphy_work_queue(sdata->local->hw.wiphy,
1789 &ifmgd->csa_connection_drop_work);
1790 return;
1791 }
1792
1793 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef,
1794 link->link_id, 0);
1795 }
1796
ieee80211_chswitch_done(struct ieee80211_vif * vif,bool success,unsigned int link_id)1797 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success,
1798 unsigned int link_id)
1799 {
1800 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1801
1802 trace_api_chswitch_done(sdata, success, link_id);
1803
1804 rcu_read_lock();
1805
1806 if (!success) {
1807 sdata_info(sdata,
1808 "driver channel switch failed, disconnecting\n");
1809 wiphy_work_queue(sdata->local->hw.wiphy,
1810 &sdata->u.mgd.csa_connection_drop_work);
1811 } else {
1812 struct ieee80211_link_data *link =
1813 rcu_dereference(sdata->link[link_id]);
1814
1815 if (WARN_ON(!link)) {
1816 rcu_read_unlock();
1817 return;
1818 }
1819
1820 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
1821 &link->u.mgd.chswitch_work, 0);
1822 }
1823
1824 rcu_read_unlock();
1825 }
1826 EXPORT_SYMBOL(ieee80211_chswitch_done);
1827
1828 static void
ieee80211_sta_abort_chanswitch(struct ieee80211_link_data * link)1829 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
1830 {
1831 struct ieee80211_sub_if_data *sdata = link->sdata;
1832 struct ieee80211_local *local = sdata->local;
1833
1834 lockdep_assert_wiphy(local->hw.wiphy);
1835
1836 if (!local->ops->abort_channel_switch)
1837 return;
1838
1839 ieee80211_link_unreserve_chanctx(link);
1840
1841 if (link->csa_block_tx)
1842 ieee80211_wake_vif_queues(local, sdata,
1843 IEEE80211_QUEUE_STOP_REASON_CSA);
1844
1845 link->csa_block_tx = false;
1846 link->conf->csa_active = false;
1847
1848 drv_abort_channel_switch(sdata);
1849 }
1850
1851 static void
ieee80211_sta_process_chanswitch(struct ieee80211_link_data * link,u64 timestamp,u32 device_timestamp,struct ieee802_11_elems * elems,bool beacon)1852 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
1853 u64 timestamp, u32 device_timestamp,
1854 struct ieee802_11_elems *elems,
1855 bool beacon)
1856 {
1857 struct ieee80211_sub_if_data *sdata = link->sdata;
1858 struct ieee80211_local *local = sdata->local;
1859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1860 struct cfg80211_bss *cbss = link->u.mgd.bss;
1861 struct ieee80211_chanctx_conf *conf;
1862 struct ieee80211_chanctx *chanctx;
1863 enum nl80211_band current_band;
1864 struct ieee80211_csa_ie csa_ie;
1865 struct ieee80211_channel_switch ch_switch;
1866 struct ieee80211_bss *bss;
1867 unsigned long timeout;
1868 int res;
1869
1870 lockdep_assert_wiphy(local->hw.wiphy);
1871
1872 if (!cbss)
1873 return;
1874
1875 current_band = cbss->channel->band;
1876 bss = (void *)cbss->priv;
1877 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1878 bss->vht_cap_info,
1879 link->u.mgd.conn_flags,
1880 link->u.mgd.bssid, &csa_ie);
1881
1882 if (!res) {
1883 ch_switch.timestamp = timestamp;
1884 ch_switch.device_timestamp = device_timestamp;
1885 ch_switch.block_tx = csa_ie.mode;
1886 ch_switch.chandef = csa_ie.chandef;
1887 ch_switch.count = csa_ie.count;
1888 ch_switch.delay = csa_ie.max_switch_time;
1889 }
1890
1891 if (res < 0)
1892 goto drop_connection;
1893
1894 if (beacon && link->conf->csa_active &&
1895 !link->u.mgd.csa_waiting_bcn) {
1896 if (res)
1897 ieee80211_sta_abort_chanswitch(link);
1898 else
1899 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1900 return;
1901 } else if (link->conf->csa_active || res) {
1902 /* disregard subsequent announcements if already processing */
1903 return;
1904 }
1905
1906 if (link->conf->chandef.chan->band !=
1907 csa_ie.chandef.chan->band) {
1908 sdata_info(sdata,
1909 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1910 link->u.mgd.bssid,
1911 csa_ie.chandef.chan->center_freq,
1912 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1913 csa_ie.chandef.center_freq2);
1914 goto drop_connection;
1915 }
1916
1917 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1918 IEEE80211_CHAN_DISABLED)) {
1919 sdata_info(sdata,
1920 "AP %pM switches to unsupported channel "
1921 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1922 "disconnecting\n",
1923 link->u.mgd.bssid,
1924 csa_ie.chandef.chan->center_freq,
1925 csa_ie.chandef.chan->freq_offset,
1926 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1927 csa_ie.chandef.freq1_offset,
1928 csa_ie.chandef.center_freq2);
1929 goto drop_connection;
1930 }
1931
1932 if (cfg80211_chandef_identical(&csa_ie.chandef,
1933 &link->conf->chandef) &&
1934 (!csa_ie.mode || !beacon)) {
1935 if (link->u.mgd.csa_ignored_same_chan)
1936 return;
1937 sdata_info(sdata,
1938 "AP %pM tries to chanswitch to same channel, ignore\n",
1939 link->u.mgd.bssid);
1940 link->u.mgd.csa_ignored_same_chan = true;
1941 return;
1942 }
1943
1944 /*
1945 * Drop all TDLS peers - either we disconnect or move to a different
1946 * channel from this point on. There's no telling what our peer will do.
1947 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1948 * have an incompatible wider chandef.
1949 */
1950 ieee80211_teardown_tdls_peers(sdata);
1951
1952 conf = rcu_dereference_protected(link->conf->chanctx_conf,
1953 lockdep_is_held(&local->hw.wiphy->mtx));
1954 if (!conf) {
1955 sdata_info(sdata,
1956 "no channel context assigned to vif?, disconnecting\n");
1957 goto drop_connection;
1958 }
1959
1960 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1961
1962 if (local->use_chanctx &&
1963 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1964 sdata_info(sdata,
1965 "driver doesn't support chan-switch with channel contexts\n");
1966 goto drop_connection;
1967 }
1968
1969 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1970 sdata_info(sdata,
1971 "preparing for channel switch failed, disconnecting\n");
1972 goto drop_connection;
1973 }
1974
1975 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
1976 chanctx->mode, false);
1977 if (res) {
1978 sdata_info(sdata,
1979 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1980 res);
1981 goto drop_connection;
1982 }
1983
1984 link->conf->csa_active = true;
1985 link->csa_chandef = csa_ie.chandef;
1986 link->csa_block_tx = csa_ie.mode;
1987 link->u.mgd.csa_ignored_same_chan = false;
1988 link->u.mgd.beacon_crc_valid = false;
1989
1990 if (link->csa_block_tx)
1991 ieee80211_stop_vif_queues(local, sdata,
1992 IEEE80211_QUEUE_STOP_REASON_CSA);
1993
1994 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1995 link->link_id, csa_ie.count,
1996 csa_ie.mode, 0);
1997
1998 if (local->ops->channel_switch) {
1999 /* use driver's channel switch callback */
2000 drv_channel_switch(local, sdata, &ch_switch);
2001 return;
2002 }
2003
2004 /* channel switch handled in software */
2005 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) *
2006 cbss->beacon_interval);
2007 wiphy_delayed_work_queue(local->hw.wiphy,
2008 &link->u.mgd.chswitch_work,
2009 timeout);
2010 return;
2011 drop_connection:
2012 /*
2013 * This is just so that the disconnect flow will know that
2014 * we were trying to switch channel and failed. In case the
2015 * mode is 1 (we are not allowed to Tx), we will know not to
2016 * send a deauthentication frame. Those two fields will be
2017 * reset when the disconnection worker runs.
2018 */
2019 link->conf->csa_active = true;
2020 link->csa_block_tx = csa_ie.mode;
2021
2022 wiphy_work_queue(sdata->local->hw.wiphy,
2023 &ifmgd->csa_connection_drop_work);
2024 }
2025
2026 static bool
ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_elem,int * chan_pwr,int * pwr_reduction)2027 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
2028 struct ieee80211_channel *channel,
2029 const u8 *country_ie, u8 country_ie_len,
2030 const u8 *pwr_constr_elem,
2031 int *chan_pwr, int *pwr_reduction)
2032 {
2033 struct ieee80211_country_ie_triplet *triplet;
2034 int chan = ieee80211_frequency_to_channel(channel->center_freq);
2035 int i, chan_increment;
2036 bool have_chan_pwr = false;
2037
2038 /* Invalid IE */
2039 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2040 return false;
2041
2042 triplet = (void *)(country_ie + 3);
2043 country_ie_len -= 3;
2044
2045 switch (channel->band) {
2046 default:
2047 WARN_ON_ONCE(1);
2048 fallthrough;
2049 case NL80211_BAND_2GHZ:
2050 case NL80211_BAND_60GHZ:
2051 case NL80211_BAND_LC:
2052 chan_increment = 1;
2053 break;
2054 case NL80211_BAND_5GHZ:
2055 chan_increment = 4;
2056 break;
2057 case NL80211_BAND_6GHZ:
2058 /*
2059 * In the 6 GHz band, the "maximum transmit power level"
2060 * field in the triplets is reserved, and thus will be
2061 * zero and we shouldn't use it to control TX power.
2062 * The actual TX power will be given in the transmit
2063 * power envelope element instead.
2064 */
2065 return false;
2066 }
2067
2068 /* find channel */
2069 while (country_ie_len >= 3) {
2070 u8 first_channel = triplet->chans.first_channel;
2071
2072 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
2073 goto next;
2074
2075 for (i = 0; i < triplet->chans.num_channels; i++) {
2076 if (first_channel + i * chan_increment == chan) {
2077 have_chan_pwr = true;
2078 *chan_pwr = triplet->chans.max_power;
2079 break;
2080 }
2081 }
2082 if (have_chan_pwr)
2083 break;
2084
2085 next:
2086 triplet++;
2087 country_ie_len -= 3;
2088 }
2089
2090 if (have_chan_pwr && pwr_constr_elem)
2091 *pwr_reduction = *pwr_constr_elem;
2092 else
2093 *pwr_reduction = 0;
2094
2095 return have_chan_pwr;
2096 }
2097
ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * cisco_dtpc_ie,int * pwr_level)2098 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2099 struct ieee80211_channel *channel,
2100 const u8 *cisco_dtpc_ie,
2101 int *pwr_level)
2102 {
2103 /* From practical testing, the first data byte of the DTPC element
2104 * seems to contain the requested dBm level, and the CLI on Cisco
2105 * APs clearly state the range is -127 to 127 dBm, which indicates
2106 * a signed byte, although it seemingly never actually goes negative.
2107 * The other byte seems to always be zero.
2108 */
2109 *pwr_level = (__s8)cisco_dtpc_ie[4];
2110 }
2111
ieee80211_handle_pwr_constr(struct ieee80211_link_data * link,struct ieee80211_channel * channel,struct ieee80211_mgmt * mgmt,const u8 * country_ie,u8 country_ie_len,const u8 * pwr_constr_ie,const u8 * cisco_dtpc_ie)2112 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2113 struct ieee80211_channel *channel,
2114 struct ieee80211_mgmt *mgmt,
2115 const u8 *country_ie, u8 country_ie_len,
2116 const u8 *pwr_constr_ie,
2117 const u8 *cisco_dtpc_ie)
2118 {
2119 struct ieee80211_sub_if_data *sdata = link->sdata;
2120 bool has_80211h_pwr = false, has_cisco_pwr = false;
2121 int chan_pwr = 0, pwr_reduction_80211h = 0;
2122 int pwr_level_cisco, pwr_level_80211h;
2123 int new_ap_level;
2124 __le16 capab = mgmt->u.probe_resp.capab_info;
2125
2126 if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2127 return 0; /* TODO */
2128
2129 if (country_ie &&
2130 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2131 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2132 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2133 sdata, channel, country_ie, country_ie_len,
2134 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2135 pwr_level_80211h =
2136 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2137 }
2138
2139 if (cisco_dtpc_ie) {
2140 ieee80211_find_cisco_dtpc(
2141 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2142 has_cisco_pwr = true;
2143 }
2144
2145 if (!has_80211h_pwr && !has_cisco_pwr)
2146 return 0;
2147
2148 /* If we have both 802.11h and Cisco DTPC, apply both limits
2149 * by picking the smallest of the two power levels advertised.
2150 */
2151 if (has_80211h_pwr &&
2152 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2153 new_ap_level = pwr_level_80211h;
2154
2155 if (link->ap_power_level == new_ap_level)
2156 return 0;
2157
2158 sdata_dbg(sdata,
2159 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2160 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2161 link->u.mgd.bssid);
2162 } else { /* has_cisco_pwr is always true here. */
2163 new_ap_level = pwr_level_cisco;
2164
2165 if (link->ap_power_level == new_ap_level)
2166 return 0;
2167
2168 sdata_dbg(sdata,
2169 "Limiting TX power to %d dBm as advertised by %pM\n",
2170 pwr_level_cisco, link->u.mgd.bssid);
2171 }
2172
2173 link->ap_power_level = new_ap_level;
2174 if (__ieee80211_recalc_txpower(sdata))
2175 return BSS_CHANGED_TXPOWER;
2176 return 0;
2177 }
2178
2179 /* powersave */
ieee80211_enable_ps(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)2180 static void ieee80211_enable_ps(struct ieee80211_local *local,
2181 struct ieee80211_sub_if_data *sdata)
2182 {
2183 struct ieee80211_conf *conf = &local->hw.conf;
2184
2185 /*
2186 * If we are scanning right now then the parameters will
2187 * take effect when scan finishes.
2188 */
2189 if (local->scanning)
2190 return;
2191
2192 if (conf->dynamic_ps_timeout > 0 &&
2193 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2194 mod_timer(&local->dynamic_ps_timer, jiffies +
2195 msecs_to_jiffies(conf->dynamic_ps_timeout));
2196 } else {
2197 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2198 ieee80211_send_nullfunc(local, sdata, true);
2199
2200 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2201 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2202 return;
2203
2204 conf->flags |= IEEE80211_CONF_PS;
2205 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2206 }
2207 }
2208
ieee80211_change_ps(struct ieee80211_local * local)2209 static void ieee80211_change_ps(struct ieee80211_local *local)
2210 {
2211 struct ieee80211_conf *conf = &local->hw.conf;
2212
2213 if (local->ps_sdata) {
2214 ieee80211_enable_ps(local, local->ps_sdata);
2215 } else if (conf->flags & IEEE80211_CONF_PS) {
2216 conf->flags &= ~IEEE80211_CONF_PS;
2217 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2218 del_timer_sync(&local->dynamic_ps_timer);
2219 wiphy_work_cancel(local->hw.wiphy,
2220 &local->dynamic_ps_enable_work);
2221 }
2222 }
2223
ieee80211_powersave_allowed(struct ieee80211_sub_if_data * sdata)2224 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2225 {
2226 struct ieee80211_local *local = sdata->local;
2227 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2228 struct sta_info *sta = NULL;
2229 bool authorized = false;
2230
2231 if (!mgd->powersave)
2232 return false;
2233
2234 if (mgd->broken_ap)
2235 return false;
2236
2237 if (!mgd->associated)
2238 return false;
2239
2240 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2241 return false;
2242
2243 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2244 !sdata->deflink.u.mgd.have_beacon)
2245 return false;
2246
2247 rcu_read_lock();
2248 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2249 if (sta)
2250 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2251 rcu_read_unlock();
2252
2253 return authorized;
2254 }
2255
2256 /* need to hold RTNL or interface lock */
ieee80211_recalc_ps(struct ieee80211_local * local)2257 void ieee80211_recalc_ps(struct ieee80211_local *local)
2258 {
2259 struct ieee80211_sub_if_data *sdata, *found = NULL;
2260 int count = 0;
2261 int timeout;
2262
2263 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2264 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2265 local->ps_sdata = NULL;
2266 return;
2267 }
2268
2269 list_for_each_entry(sdata, &local->interfaces, list) {
2270 if (!ieee80211_sdata_running(sdata))
2271 continue;
2272 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2273 /* If an AP vif is found, then disable PS
2274 * by setting the count to zero thereby setting
2275 * ps_sdata to NULL.
2276 */
2277 count = 0;
2278 break;
2279 }
2280 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2281 continue;
2282 found = sdata;
2283 count++;
2284 }
2285
2286 if (count == 1 && ieee80211_powersave_allowed(found)) {
2287 u8 dtimper = found->deflink.u.mgd.dtim_period;
2288
2289 timeout = local->dynamic_ps_forced_timeout;
2290 if (timeout < 0)
2291 timeout = 100;
2292 local->hw.conf.dynamic_ps_timeout = timeout;
2293
2294 /* If the TIM IE is invalid, pretend the value is 1 */
2295 if (!dtimper)
2296 dtimper = 1;
2297
2298 local->hw.conf.ps_dtim_period = dtimper;
2299 local->ps_sdata = found;
2300 } else {
2301 local->ps_sdata = NULL;
2302 }
2303
2304 ieee80211_change_ps(local);
2305 }
2306
ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data * sdata)2307 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2308 {
2309 bool ps_allowed = ieee80211_powersave_allowed(sdata);
2310
2311 if (sdata->vif.cfg.ps != ps_allowed) {
2312 sdata->vif.cfg.ps = ps_allowed;
2313 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2314 }
2315 }
2316
ieee80211_dynamic_ps_disable_work(struct wiphy * wiphy,struct wiphy_work * work)2317 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy,
2318 struct wiphy_work *work)
2319 {
2320 struct ieee80211_local *local =
2321 container_of(work, struct ieee80211_local,
2322 dynamic_ps_disable_work);
2323
2324 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2325 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2327 }
2328
2329 ieee80211_wake_queues_by_reason(&local->hw,
2330 IEEE80211_MAX_QUEUE_MAP,
2331 IEEE80211_QUEUE_STOP_REASON_PS,
2332 false);
2333 }
2334
ieee80211_dynamic_ps_enable_work(struct wiphy * wiphy,struct wiphy_work * work)2335 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy,
2336 struct wiphy_work *work)
2337 {
2338 struct ieee80211_local *local =
2339 container_of(work, struct ieee80211_local,
2340 dynamic_ps_enable_work);
2341 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2342 struct ieee80211_if_managed *ifmgd;
2343 unsigned long flags;
2344 int q;
2345
2346 /* can only happen when PS was just disabled anyway */
2347 if (!sdata)
2348 return;
2349
2350 ifmgd = &sdata->u.mgd;
2351
2352 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2353 return;
2354
2355 if (local->hw.conf.dynamic_ps_timeout > 0) {
2356 /* don't enter PS if TX frames are pending */
2357 if (drv_tx_frames_pending(local)) {
2358 mod_timer(&local->dynamic_ps_timer, jiffies +
2359 msecs_to_jiffies(
2360 local->hw.conf.dynamic_ps_timeout));
2361 return;
2362 }
2363
2364 /*
2365 * transmission can be stopped by others which leads to
2366 * dynamic_ps_timer expiry. Postpone the ps timer if it
2367 * is not the actual idle state.
2368 */
2369 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2370 for (q = 0; q < local->hw.queues; q++) {
2371 if (local->queue_stop_reasons[q]) {
2372 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2373 flags);
2374 mod_timer(&local->dynamic_ps_timer, jiffies +
2375 msecs_to_jiffies(
2376 local->hw.conf.dynamic_ps_timeout));
2377 return;
2378 }
2379 }
2380 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2381 }
2382
2383 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2384 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2385 if (drv_tx_frames_pending(local)) {
2386 mod_timer(&local->dynamic_ps_timer, jiffies +
2387 msecs_to_jiffies(
2388 local->hw.conf.dynamic_ps_timeout));
2389 } else {
2390 ieee80211_send_nullfunc(local, sdata, true);
2391 /* Flush to get the tx status of nullfunc frame */
2392 ieee80211_flush_queues(local, sdata, false);
2393 }
2394 }
2395
2396 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
2397 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
2398 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2399 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2400 local->hw.conf.flags |= IEEE80211_CONF_PS;
2401 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2402 }
2403 }
2404
ieee80211_dynamic_ps_timer(struct timer_list * t)2405 void ieee80211_dynamic_ps_timer(struct timer_list *t)
2406 {
2407 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
2408
2409 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work);
2410 }
2411
ieee80211_dfs_cac_timer_work(struct wiphy * wiphy,struct wiphy_work * work)2412 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work)
2413 {
2414 struct ieee80211_link_data *link =
2415 container_of(work, struct ieee80211_link_data,
2416 dfs_cac_timer_work.work);
2417 struct cfg80211_chan_def chandef = link->conf->chandef;
2418 struct ieee80211_sub_if_data *sdata = link->sdata;
2419
2420 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2421
2422 if (sdata->wdev.cac_started) {
2423 ieee80211_link_release_channel(link);
2424 cfg80211_cac_event(sdata->dev, &chandef,
2425 NL80211_RADAR_CAC_FINISHED,
2426 GFP_KERNEL);
2427 }
2428 }
2429
2430 static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2431 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2432 {
2433 struct ieee80211_local *local = sdata->local;
2434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2435 bool ret = false;
2436 int ac;
2437
2438 if (local->hw.queues < IEEE80211_NUM_ACS)
2439 return false;
2440
2441 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2442 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2443 int non_acm_ac;
2444 unsigned long now = jiffies;
2445
2446 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
2447 tx_tspec->admitted_time &&
2448 time_after(now, tx_tspec->time_slice_start + HZ)) {
2449 tx_tspec->consumed_tx_time = 0;
2450 tx_tspec->time_slice_start = now;
2451
2452 if (tx_tspec->downgraded)
2453 tx_tspec->action =
2454 TX_TSPEC_ACTION_STOP_DOWNGRADE;
2455 }
2456
2457 switch (tx_tspec->action) {
2458 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
2459 /* take the original parameters */
2460 if (drv_conf_tx(local, &sdata->deflink, ac,
2461 &sdata->deflink.tx_conf[ac]))
2462 link_err(&sdata->deflink,
2463 "failed to set TX queue parameters for queue %d\n",
2464 ac);
2465 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2466 tx_tspec->downgraded = false;
2467 ret = true;
2468 break;
2469 case TX_TSPEC_ACTION_DOWNGRADE:
2470 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2471 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2472 ret = true;
2473 break;
2474 }
2475 /* downgrade next lower non-ACM AC */
2476 for (non_acm_ac = ac + 1;
2477 non_acm_ac < IEEE80211_NUM_ACS;
2478 non_acm_ac++)
2479 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2480 break;
2481 /* Usually the loop will result in using BK even if it
2482 * requires admission control, but such a configuration
2483 * makes no sense and we have to transmit somehow - the
2484 * AC selection does the same thing.
2485 * If we started out trying to downgrade from BK, then
2486 * the extra condition here might be needed.
2487 */
2488 if (non_acm_ac >= IEEE80211_NUM_ACS)
2489 non_acm_ac = IEEE80211_AC_BK;
2490 if (drv_conf_tx(local, &sdata->deflink, ac,
2491 &sdata->deflink.tx_conf[non_acm_ac]))
2492 link_err(&sdata->deflink,
2493 "failed to set TX queue parameters for queue %d\n",
2494 ac);
2495 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2496 ret = true;
2497 wiphy_delayed_work_queue(local->hw.wiphy,
2498 &ifmgd->tx_tspec_wk,
2499 tx_tspec->time_slice_start +
2500 HZ - now + 1);
2501 break;
2502 case TX_TSPEC_ACTION_NONE:
2503 /* nothing now */
2504 break;
2505 }
2506 }
2507
2508 return ret;
2509 }
2510
ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2511 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2512 {
2513 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2514 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
2515 BSS_CHANGED_QOS);
2516 }
2517
ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy * wiphy,struct wiphy_work * work)2518 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy,
2519 struct wiphy_work *work)
2520 {
2521 struct ieee80211_sub_if_data *sdata;
2522
2523 sdata = container_of(work, struct ieee80211_sub_if_data,
2524 u.mgd.tx_tspec_wk.work);
2525 ieee80211_sta_handle_tspec_ac_params(sdata);
2526 }
2527
ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data * link)2528 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
2529 {
2530 struct ieee80211_sub_if_data *sdata = link->sdata;
2531 struct ieee80211_local *local = sdata->local;
2532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2533 struct ieee80211_tx_queue_params *params = link->tx_conf;
2534 u8 ac;
2535
2536 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2537 mlme_dbg(sdata,
2538 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2539 ac, params[ac].acm,
2540 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2541 params[ac].txop, params[ac].uapsd,
2542 ifmgd->tx_tspec[ac].downgraded);
2543 if (!ifmgd->tx_tspec[ac].downgraded &&
2544 drv_conf_tx(local, link, ac, ¶ms[ac]))
2545 link_err(link,
2546 "failed to set TX queue parameters for AC %d\n",
2547 ac);
2548 }
2549 }
2550
2551 /* MLME */
2552 static bool
ieee80211_sta_wmm_params(struct ieee80211_local * local,struct ieee80211_link_data * link,const u8 * wmm_param,size_t wmm_param_len,const struct ieee80211_mu_edca_param_set * mu_edca)2553 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2554 struct ieee80211_link_data *link,
2555 const u8 *wmm_param, size_t wmm_param_len,
2556 const struct ieee80211_mu_edca_param_set *mu_edca)
2557 {
2558 struct ieee80211_sub_if_data *sdata = link->sdata;
2559 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2561 size_t left;
2562 int count, mu_edca_count, ac;
2563 const u8 *pos;
2564 u8 uapsd_queues = 0;
2565
2566 if (!local->ops->conf_tx)
2567 return false;
2568
2569 if (local->hw.queues < IEEE80211_NUM_ACS)
2570 return false;
2571
2572 if (!wmm_param)
2573 return false;
2574
2575 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2576 return false;
2577
2578 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2579 uapsd_queues = ifmgd->uapsd_queues;
2580
2581 count = wmm_param[6] & 0x0f;
2582 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2583 * if mu_edca was preset before and now it disappeared tell
2584 * the driver about it.
2585 */
2586 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2587 if (count == link->u.mgd.wmm_last_param_set &&
2588 mu_edca_count == link->u.mgd.mu_edca_last_param_set)
2589 return false;
2590 link->u.mgd.wmm_last_param_set = count;
2591 link->u.mgd.mu_edca_last_param_set = mu_edca_count;
2592
2593 pos = wmm_param + 8;
2594 left = wmm_param_len - 8;
2595
2596 memset(¶ms, 0, sizeof(params));
2597
2598 sdata->wmm_acm = 0;
2599 for (; left >= 4; left -= 4, pos += 4) {
2600 int aci = (pos[0] >> 5) & 0x03;
2601 int acm = (pos[0] >> 4) & 0x01;
2602 bool uapsd = false;
2603
2604 switch (aci) {
2605 case 1: /* AC_BK */
2606 ac = IEEE80211_AC_BK;
2607 if (acm)
2608 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2609 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2610 uapsd = true;
2611 params[ac].mu_edca = !!mu_edca;
2612 if (mu_edca)
2613 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2614 break;
2615 case 2: /* AC_VI */
2616 ac = IEEE80211_AC_VI;
2617 if (acm)
2618 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2620 uapsd = true;
2621 params[ac].mu_edca = !!mu_edca;
2622 if (mu_edca)
2623 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2624 break;
2625 case 3: /* AC_VO */
2626 ac = IEEE80211_AC_VO;
2627 if (acm)
2628 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2629 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2630 uapsd = true;
2631 params[ac].mu_edca = !!mu_edca;
2632 if (mu_edca)
2633 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2634 break;
2635 case 0: /* AC_BE */
2636 default:
2637 ac = IEEE80211_AC_BE;
2638 if (acm)
2639 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2641 uapsd = true;
2642 params[ac].mu_edca = !!mu_edca;
2643 if (mu_edca)
2644 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2645 break;
2646 }
2647
2648 params[ac].aifs = pos[0] & 0x0f;
2649
2650 if (params[ac].aifs < 2) {
2651 link_info(link,
2652 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2653 params[ac].aifs, aci);
2654 params[ac].aifs = 2;
2655 }
2656 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2657 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2658 params[ac].txop = get_unaligned_le16(pos + 2);
2659 params[ac].acm = acm;
2660 params[ac].uapsd = uapsd;
2661
2662 if (params[ac].cw_min == 0 ||
2663 params[ac].cw_min > params[ac].cw_max) {
2664 link_info(link,
2665 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2666 params[ac].cw_min, params[ac].cw_max, aci);
2667 return false;
2668 }
2669 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2670 }
2671
2672 /* WMM specification requires all 4 ACIs. */
2673 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2674 if (params[ac].cw_min == 0) {
2675 link_info(link,
2676 "AP has invalid WMM params (missing AC %d), using defaults\n",
2677 ac);
2678 return false;
2679 }
2680 }
2681
2682 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2683 link->tx_conf[ac] = params[ac];
2684
2685 ieee80211_mgd_set_link_qos_params(link);
2686
2687 /* enable WMM or activate new settings */
2688 link->conf->qos = true;
2689 return true;
2690 }
2691
__ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2692 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2693 {
2694 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2695
2696 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2697 ieee80211_run_deferred_scan(sdata->local);
2698 }
2699
ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2700 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2701 {
2702 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2703
2704 __ieee80211_stop_poll(sdata);
2705 }
2706
ieee80211_handle_bss_capability(struct ieee80211_link_data * link,u16 capab,bool erp_valid,u8 erp)2707 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
2708 u16 capab, bool erp_valid, u8 erp)
2709 {
2710 struct ieee80211_bss_conf *bss_conf = link->conf;
2711 struct ieee80211_supported_band *sband;
2712 u64 changed = 0;
2713 bool use_protection;
2714 bool use_short_preamble;
2715 bool use_short_slot;
2716
2717 sband = ieee80211_get_link_sband(link);
2718 if (!sband)
2719 return changed;
2720
2721 if (erp_valid) {
2722 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2723 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2724 } else {
2725 use_protection = false;
2726 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2727 }
2728
2729 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2730 if (sband->band == NL80211_BAND_5GHZ ||
2731 sband->band == NL80211_BAND_6GHZ)
2732 use_short_slot = true;
2733
2734 if (use_protection != bss_conf->use_cts_prot) {
2735 bss_conf->use_cts_prot = use_protection;
2736 changed |= BSS_CHANGED_ERP_CTS_PROT;
2737 }
2738
2739 if (use_short_preamble != bss_conf->use_short_preamble) {
2740 bss_conf->use_short_preamble = use_short_preamble;
2741 changed |= BSS_CHANGED_ERP_PREAMBLE;
2742 }
2743
2744 if (use_short_slot != bss_conf->use_short_slot) {
2745 bss_conf->use_short_slot = use_short_slot;
2746 changed |= BSS_CHANGED_ERP_SLOT;
2747 }
2748
2749 return changed;
2750 }
2751
ieee80211_link_set_associated(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)2752 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link,
2753 struct cfg80211_bss *cbss)
2754 {
2755 struct ieee80211_sub_if_data *sdata = link->sdata;
2756 struct ieee80211_bss_conf *bss_conf = link->conf;
2757 struct ieee80211_bss *bss = (void *)cbss->priv;
2758 u64 changed = BSS_CHANGED_QOS;
2759
2760 /* not really used in MLO */
2761 sdata->u.mgd.beacon_timeout =
2762 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
2763 bss_conf->beacon_int));
2764
2765 changed |= ieee80211_handle_bss_capability(link,
2766 bss_conf->assoc_capability,
2767 bss->has_erp_value,
2768 bss->erp_value);
2769
2770 ieee80211_check_rate_mask(link);
2771
2772 link->u.mgd.bss = cbss;
2773 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2774
2775 if (sdata->vif.p2p ||
2776 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2777 const struct cfg80211_bss_ies *ies;
2778
2779 rcu_read_lock();
2780 ies = rcu_dereference(cbss->ies);
2781 if (ies) {
2782 int ret;
2783
2784 ret = cfg80211_get_p2p_attr(
2785 ies->data, ies->len,
2786 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2787 (u8 *) &bss_conf->p2p_noa_attr,
2788 sizeof(bss_conf->p2p_noa_attr));
2789 if (ret >= 2) {
2790 link->u.mgd.p2p_noa_index =
2791 bss_conf->p2p_noa_attr.index;
2792 changed |= BSS_CHANGED_P2P_PS;
2793 }
2794 }
2795 rcu_read_unlock();
2796 }
2797
2798 if (link->u.mgd.have_beacon) {
2799 bss_conf->beacon_rate = bss->beacon_rate;
2800 changed |= BSS_CHANGED_BEACON_INFO;
2801 } else {
2802 bss_conf->beacon_rate = NULL;
2803 }
2804
2805 /* Tell the driver to monitor connection quality (if supported) */
2806 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2807 bss_conf->cqm_rssi_thold)
2808 changed |= BSS_CHANGED_CQM;
2809
2810 return changed;
2811 }
2812
ieee80211_set_associated(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])2813 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2814 struct ieee80211_mgd_assoc_data *assoc_data,
2815 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
2816 {
2817 struct ieee80211_local *local = sdata->local;
2818 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
2819 u64 vif_changed = BSS_CHANGED_ASSOC;
2820 unsigned int link_id;
2821
2822 lockdep_assert_wiphy(local->hw.wiphy);
2823
2824 sdata->u.mgd.associated = true;
2825
2826 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2827 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2828 struct ieee80211_link_data *link;
2829
2830 if (!cbss ||
2831 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
2832 continue;
2833
2834 if (ieee80211_vif_is_mld(&sdata->vif) &&
2835 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id)))
2836 continue;
2837
2838 link = sdata_dereference(sdata->link[link_id], sdata);
2839 if (WARN_ON(!link))
2840 return;
2841
2842 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
2843 }
2844
2845 /* just to be sure */
2846 ieee80211_stop_poll(sdata);
2847
2848 ieee80211_led_assoc(local, 1);
2849
2850 vif_cfg->assoc = 1;
2851
2852 /* Enable ARP filtering */
2853 if (vif_cfg->arp_addr_cnt)
2854 vif_changed |= BSS_CHANGED_ARP_FILTER;
2855
2856 if (ieee80211_vif_is_mld(&sdata->vif)) {
2857 for (link_id = 0;
2858 link_id < IEEE80211_MLD_MAX_NUM_LINKS;
2859 link_id++) {
2860 struct ieee80211_link_data *link;
2861 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2862
2863 if (!cbss ||
2864 !(BIT(link_id) &
2865 ieee80211_vif_usable_links(&sdata->vif)) ||
2866 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
2867 continue;
2868
2869 link = sdata_dereference(sdata->link[link_id], sdata);
2870 if (WARN_ON(!link))
2871 return;
2872
2873 ieee80211_link_info_change_notify(sdata, link,
2874 changed[link_id]);
2875
2876 ieee80211_recalc_smps(sdata, link);
2877 }
2878
2879 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
2880 } else {
2881 ieee80211_bss_info_change_notify(sdata,
2882 vif_changed | changed[0]);
2883 }
2884
2885 ieee80211_recalc_ps(local);
2886
2887 /* leave this here to not change ordering in non-MLO cases */
2888 if (!ieee80211_vif_is_mld(&sdata->vif))
2889 ieee80211_recalc_smps(sdata, &sdata->deflink);
2890 ieee80211_recalc_ps_vif(sdata);
2891
2892 netif_carrier_on(sdata->dev);
2893 }
2894
ieee80211_set_disassoc(struct ieee80211_sub_if_data * sdata,u16 stype,u16 reason,bool tx,u8 * frame_buf)2895 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2896 u16 stype, u16 reason, bool tx,
2897 u8 *frame_buf)
2898 {
2899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2900 struct ieee80211_local *local = sdata->local;
2901 unsigned int link_id;
2902 u64 changed = 0;
2903 struct ieee80211_prep_tx_info info = {
2904 .subtype = stype,
2905 };
2906
2907 lockdep_assert_wiphy(local->hw.wiphy);
2908
2909 if (WARN_ON_ONCE(tx && !frame_buf))
2910 return;
2911
2912 if (WARN_ON(!ifmgd->associated))
2913 return;
2914
2915 ieee80211_stop_poll(sdata);
2916
2917 ifmgd->associated = false;
2918
2919 /* other links will be destroyed */
2920 sdata->deflink.u.mgd.bss = NULL;
2921 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
2922
2923 netif_carrier_off(sdata->dev);
2924
2925 /*
2926 * if we want to get out of ps before disassoc (why?) we have
2927 * to do it before sending disassoc, as otherwise the null-packet
2928 * won't be valid.
2929 */
2930 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2931 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2932 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2933 }
2934 local->ps_sdata = NULL;
2935
2936 /* disable per-vif ps */
2937 ieee80211_recalc_ps_vif(sdata);
2938
2939 /* make sure ongoing transmission finishes */
2940 synchronize_net();
2941
2942 /*
2943 * drop any frame before deauth/disassoc, this can be data or
2944 * management frame. Since we are disconnecting, we should not
2945 * insist sending these frames which can take time and delay
2946 * the disconnection and possible the roaming.
2947 */
2948 if (tx)
2949 ieee80211_flush_queues(local, sdata, true);
2950
2951 /* deauthenticate/disassociate now */
2952 if (tx || frame_buf) {
2953 /*
2954 * In multi channel scenarios guarantee that the virtual
2955 * interface is granted immediate airtime to transmit the
2956 * deauthentication frame by calling mgd_prepare_tx, if the
2957 * driver requested so.
2958 */
2959 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) {
2960 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link);
2961 link_id++) {
2962 struct ieee80211_link_data *link;
2963
2964 link = sdata_dereference(sdata->link[link_id],
2965 sdata);
2966 if (!link)
2967 continue;
2968 if (link->u.mgd.have_beacon)
2969 break;
2970 }
2971 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) {
2972 info.link_id = ffs(sdata->vif.active_links) - 1;
2973 drv_mgd_prepare_tx(sdata->local, sdata, &info);
2974 }
2975 }
2976
2977 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
2978 sdata->vif.cfg.ap_addr, stype,
2979 reason, tx, frame_buf);
2980 }
2981
2982 /* flush out frame - make sure the deauth was actually sent */
2983 if (tx)
2984 ieee80211_flush_queues(local, sdata, false);
2985
2986 drv_mgd_complete_tx(sdata->local, sdata, &info);
2987
2988 /* clear AP addr only after building the needed mgmt frames */
2989 eth_zero_addr(sdata->deflink.u.mgd.bssid);
2990 eth_zero_addr(sdata->vif.cfg.ap_addr);
2991
2992 sdata->vif.cfg.ssid_len = 0;
2993
2994 /* remove AP and TDLS peers */
2995 sta_info_flush(sdata);
2996
2997 /* finally reset all BSS / config parameters */
2998 if (!ieee80211_vif_is_mld(&sdata->vif))
2999 changed |= ieee80211_reset_erp_info(sdata);
3000
3001 ieee80211_led_assoc(local, 0);
3002 changed |= BSS_CHANGED_ASSOC;
3003 sdata->vif.cfg.assoc = false;
3004
3005 sdata->deflink.u.mgd.p2p_noa_index = -1;
3006 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
3007 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
3008
3009 /* on the next assoc, re-program HT/VHT parameters */
3010 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
3011 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
3012 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
3013 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
3014
3015 /*
3016 * reset MU-MIMO ownership and group data in default link,
3017 * if used, other links are destroyed
3018 */
3019 memset(sdata->vif.bss_conf.mu_group.membership, 0,
3020 sizeof(sdata->vif.bss_conf.mu_group.membership));
3021 memset(sdata->vif.bss_conf.mu_group.position, 0,
3022 sizeof(sdata->vif.bss_conf.mu_group.position));
3023 if (!ieee80211_vif_is_mld(&sdata->vif))
3024 changed |= BSS_CHANGED_MU_GROUPS;
3025 sdata->vif.bss_conf.mu_mimo_owner = false;
3026
3027 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
3028
3029 del_timer_sync(&local->dynamic_ps_timer);
3030 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
3031
3032 /* Disable ARP filtering */
3033 if (sdata->vif.cfg.arp_addr_cnt)
3034 changed |= BSS_CHANGED_ARP_FILTER;
3035
3036 sdata->vif.bss_conf.qos = false;
3037 if (!ieee80211_vif_is_mld(&sdata->vif)) {
3038 changed |= BSS_CHANGED_QOS;
3039 /* The BSSID (not really interesting) and HT changed */
3040 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
3041 ieee80211_bss_info_change_notify(sdata, changed);
3042 } else {
3043 ieee80211_vif_cfg_change_notify(sdata, changed);
3044 }
3045
3046 /* disassociated - set to defaults now */
3047 ieee80211_set_wmm_default(&sdata->deflink, false, false);
3048
3049 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
3050 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
3051 del_timer_sync(&sdata->u.mgd.timer);
3052
3053 sdata->vif.bss_conf.dtim_period = 0;
3054 sdata->vif.bss_conf.beacon_rate = NULL;
3055
3056 sdata->deflink.u.mgd.have_beacon = false;
3057 sdata->deflink.u.mgd.tracking_signal_avg = false;
3058 sdata->deflink.u.mgd.disable_wmm_tracking = false;
3059
3060 ifmgd->flags = 0;
3061 sdata->deflink.u.mgd.conn_flags = 0;
3062
3063 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
3064 struct ieee80211_link_data *link;
3065
3066 link = sdata_dereference(sdata->link[link_id], sdata);
3067 if (!link)
3068 continue;
3069 ieee80211_link_release_channel(link);
3070 }
3071
3072 sdata->vif.bss_conf.csa_active = false;
3073 sdata->deflink.u.mgd.csa_waiting_bcn = false;
3074 sdata->deflink.u.mgd.csa_ignored_same_chan = false;
3075 if (sdata->deflink.csa_block_tx) {
3076 ieee80211_wake_vif_queues(local, sdata,
3077 IEEE80211_QUEUE_STOP_REASON_CSA);
3078 sdata->deflink.csa_block_tx = false;
3079 }
3080
3081 /* existing TX TSPEC sessions no longer exist */
3082 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
3083 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk);
3084
3085 sdata->vif.bss_conf.pwr_reduction = 0;
3086 sdata->vif.bss_conf.tx_pwr_env_num = 0;
3087 memset(sdata->vif.bss_conf.tx_pwr_env, 0,
3088 sizeof(sdata->vif.bss_conf.tx_pwr_env));
3089
3090 memset(&sdata->u.mgd.ttlm_info, 0,
3091 sizeof(sdata->u.mgd.ttlm_info));
3092 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work);
3093 ieee80211_vif_set_links(sdata, 0, 0);
3094 }
3095
ieee80211_reset_ap_probe(struct ieee80211_sub_if_data * sdata)3096 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
3097 {
3098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3099 struct ieee80211_local *local = sdata->local;
3100
3101 lockdep_assert_wiphy(local->hw.wiphy);
3102
3103 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3104 return;
3105
3106 __ieee80211_stop_poll(sdata);
3107
3108 ieee80211_recalc_ps(local);
3109
3110 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3111 return;
3112
3113 /*
3114 * We've received a probe response, but are not sure whether
3115 * we have or will be receiving any beacons or data, so let's
3116 * schedule the timers again, just in case.
3117 */
3118 ieee80211_sta_reset_beacon_monitor(sdata);
3119
3120 mod_timer(&ifmgd->conn_mon_timer,
3121 round_jiffies_up(jiffies +
3122 IEEE80211_CONNECTION_IDLE_TIME));
3123 }
3124
ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,u16 tx_time)3125 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3126 struct ieee80211_hdr *hdr,
3127 u16 tx_time)
3128 {
3129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3130 u16 tid;
3131 int ac;
3132 struct ieee80211_sta_tx_tspec *tx_tspec;
3133 unsigned long now = jiffies;
3134
3135 if (!ieee80211_is_data_qos(hdr->frame_control))
3136 return;
3137
3138 tid = ieee80211_get_tid(hdr);
3139 ac = ieee80211_ac_from_tid(tid);
3140 tx_tspec = &ifmgd->tx_tspec[ac];
3141
3142 if (likely(!tx_tspec->admitted_time))
3143 return;
3144
3145 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3146 tx_tspec->consumed_tx_time = 0;
3147 tx_tspec->time_slice_start = now;
3148
3149 if (tx_tspec->downgraded) {
3150 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3151 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
3152 &ifmgd->tx_tspec_wk, 0);
3153 }
3154 }
3155
3156 if (tx_tspec->downgraded)
3157 return;
3158
3159 tx_tspec->consumed_tx_time += tx_time;
3160
3161 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3162 tx_tspec->downgraded = true;
3163 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3164 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
3165 &ifmgd->tx_tspec_wk, 0);
3166 }
3167 }
3168
ieee80211_sta_tx_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,bool ack,u16 tx_time)3169 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3170 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3171 {
3172 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3173
3174 if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3175 !sdata->u.mgd.probe_send_count)
3176 return;
3177
3178 if (ack)
3179 sdata->u.mgd.probe_send_count = 0;
3180 else
3181 sdata->u.mgd.nullfunc_failed = true;
3182 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
3183 }
3184
ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,const u8 * ssid,size_t ssid_len,struct ieee80211_channel * channel)3185 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3186 const u8 *src, const u8 *dst,
3187 const u8 *ssid, size_t ssid_len,
3188 struct ieee80211_channel *channel)
3189 {
3190 struct sk_buff *skb;
3191
3192 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3193 ssid, ssid_len, NULL, 0,
3194 IEEE80211_PROBE_FLAG_DIRECTED);
3195 if (skb)
3196 ieee80211_tx_skb(sdata, skb);
3197 }
3198
ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data * sdata)3199 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3200 {
3201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3202 u8 *dst = sdata->vif.cfg.ap_addr;
3203 u8 unicast_limit = max(1, max_probe_tries - 3);
3204 struct sta_info *sta;
3205
3206 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3207
3208 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
3209 return;
3210
3211 /*
3212 * Try sending broadcast probe requests for the last three
3213 * probe requests after the first ones failed since some
3214 * buggy APs only support broadcast probe requests.
3215 */
3216 if (ifmgd->probe_send_count >= unicast_limit)
3217 dst = NULL;
3218
3219 /*
3220 * When the hardware reports an accurate Tx ACK status, it's
3221 * better to send a nullfunc frame instead of a probe request,
3222 * as it will kick us off the AP quickly if we aren't associated
3223 * anymore. The timeout will be reset if the frame is ACKed by
3224 * the AP.
3225 */
3226 ifmgd->probe_send_count++;
3227
3228 if (dst) {
3229 sta = sta_info_get(sdata, dst);
3230 if (!WARN_ON(!sta))
3231 ieee80211_check_fast_rx(sta);
3232 }
3233
3234 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3235 ifmgd->nullfunc_failed = false;
3236 ieee80211_send_nullfunc(sdata->local, sdata, false);
3237 } else {
3238 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3239 sdata->vif.cfg.ssid,
3240 sdata->vif.cfg.ssid_len,
3241 sdata->deflink.u.mgd.bss->channel);
3242 }
3243
3244 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3245 run_again(sdata, ifmgd->probe_timeout);
3246 }
3247
ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data * sdata,bool beacon)3248 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3249 bool beacon)
3250 {
3251 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3252 bool already = false;
3253
3254 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3255
3256 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)))
3257 return;
3258
3259 if (!ieee80211_sdata_running(sdata))
3260 return;
3261
3262 if (!ifmgd->associated)
3263 return;
3264
3265 if (sdata->local->tmp_channel || sdata->local->scanning)
3266 return;
3267
3268 if (sdata->local->suspending) {
3269 /* reschedule after resume */
3270 ieee80211_reset_ap_probe(sdata);
3271 return;
3272 }
3273
3274 if (beacon) {
3275 mlme_dbg_ratelimited(sdata,
3276 "detected beacon loss from AP (missed %d beacons) - probing\n",
3277 beacon_loss_count);
3278
3279 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3280 }
3281
3282 /*
3283 * The driver/our work has already reported this event or the
3284 * connection monitoring has kicked in and we have already sent
3285 * a probe request. Or maybe the AP died and the driver keeps
3286 * reporting until we disassociate...
3287 *
3288 * In either case we have to ignore the current call to this
3289 * function (except for setting the correct probe reason bit)
3290 * because otherwise we would reset the timer every time and
3291 * never check whether we received a probe response!
3292 */
3293 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3294 already = true;
3295
3296 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3297
3298 if (already)
3299 return;
3300
3301 ieee80211_recalc_ps(sdata->local);
3302
3303 ifmgd->probe_send_count = 0;
3304 ieee80211_mgd_probe_ap_send(sdata);
3305 }
3306
ieee80211_ap_probereq_get(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3307 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3308 struct ieee80211_vif *vif)
3309 {
3310 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3312 struct cfg80211_bss *cbss;
3313 struct sk_buff *skb;
3314 const struct element *ssid;
3315 int ssid_len;
3316
3317 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3318
3319 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3320 ieee80211_vif_is_mld(&sdata->vif)))
3321 return NULL;
3322
3323 if (ifmgd->associated)
3324 cbss = sdata->deflink.u.mgd.bss;
3325 else if (ifmgd->auth_data)
3326 cbss = ifmgd->auth_data->bss;
3327 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3328 cbss = ifmgd->assoc_data->link[0].bss;
3329 else
3330 return NULL;
3331
3332 rcu_read_lock();
3333 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3334 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3335 "invalid SSID element (len=%d)",
3336 ssid ? ssid->datalen : -1))
3337 ssid_len = 0;
3338 else
3339 ssid_len = ssid->datalen;
3340
3341 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3342 (u32) -1, cbss->channel,
3343 ssid->data, ssid_len,
3344 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3345 rcu_read_unlock();
3346
3347 return skb;
3348 }
3349 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3350
ieee80211_report_disconnect(struct ieee80211_sub_if_data * sdata,const u8 * buf,size_t len,bool tx,u16 reason,bool reconnect)3351 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3352 const u8 *buf, size_t len, bool tx,
3353 u16 reason, bool reconnect)
3354 {
3355 struct ieee80211_event event = {
3356 .type = MLME_EVENT,
3357 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3358 .u.mlme.reason = reason,
3359 };
3360
3361 if (tx)
3362 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3363 else
3364 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3365
3366 drv_event_callback(sdata->local, sdata, &event);
3367 }
3368
__ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)3369 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3370 {
3371 struct ieee80211_local *local = sdata->local;
3372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3373 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3374 bool tx;
3375
3376 lockdep_assert_wiphy(local->hw.wiphy);
3377
3378 if (!ifmgd->associated)
3379 return;
3380
3381 /* in MLO assume we have a link where we can TX the frame */
3382 tx = ieee80211_vif_is_mld(&sdata->vif) ||
3383 !sdata->deflink.csa_block_tx;
3384
3385 if (!ifmgd->driver_disconnect) {
3386 unsigned int link_id;
3387
3388 /*
3389 * AP is probably out of range (or not reachable for another
3390 * reason) so remove the bss structs for that AP. In the case
3391 * of multi-link, it's not clear that all of them really are
3392 * out of range, but if they weren't the driver likely would
3393 * have switched to just have a single link active?
3394 */
3395 for (link_id = 0;
3396 link_id < ARRAY_SIZE(sdata->link);
3397 link_id++) {
3398 struct ieee80211_link_data *link;
3399
3400 link = sdata_dereference(sdata->link[link_id], sdata);
3401 if (!link)
3402 continue;
3403 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
3404 link->u.mgd.bss = NULL;
3405 }
3406 }
3407
3408 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3409 ifmgd->driver_disconnect ?
3410 WLAN_REASON_DEAUTH_LEAVING :
3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3412 tx, frame_buf);
3413 /* the other links will be destroyed */
3414 sdata->vif.bss_conf.csa_active = false;
3415 sdata->deflink.u.mgd.csa_waiting_bcn = false;
3416 if (sdata->deflink.csa_block_tx) {
3417 ieee80211_wake_vif_queues(local, sdata,
3418 IEEE80211_QUEUE_STOP_REASON_CSA);
3419 sdata->deflink.csa_block_tx = false;
3420 }
3421
3422 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
3423 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3424 ifmgd->reconnect);
3425 ifmgd->reconnect = false;
3426 }
3427
ieee80211_beacon_connection_loss_work(struct wiphy * wiphy,struct wiphy_work * work)3428 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy,
3429 struct wiphy_work *work)
3430 {
3431 struct ieee80211_sub_if_data *sdata =
3432 container_of(work, struct ieee80211_sub_if_data,
3433 u.mgd.beacon_connection_loss_work);
3434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3435
3436 if (ifmgd->connection_loss) {
3437 sdata_info(sdata, "Connection to AP %pM lost\n",
3438 sdata->vif.cfg.ap_addr);
3439 __ieee80211_disconnect(sdata);
3440 ifmgd->connection_loss = false;
3441 } else if (ifmgd->driver_disconnect) {
3442 sdata_info(sdata,
3443 "Driver requested disconnection from AP %pM\n",
3444 sdata->vif.cfg.ap_addr);
3445 __ieee80211_disconnect(sdata);
3446 ifmgd->driver_disconnect = false;
3447 } else {
3448 if (ifmgd->associated)
3449 sdata->deflink.u.mgd.beacon_loss_count++;
3450 ieee80211_mgd_probe_ap(sdata, true);
3451 }
3452 }
3453
ieee80211_csa_connection_drop_work(struct wiphy * wiphy,struct wiphy_work * work)3454 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy,
3455 struct wiphy_work *work)
3456 {
3457 struct ieee80211_sub_if_data *sdata =
3458 container_of(work, struct ieee80211_sub_if_data,
3459 u.mgd.csa_connection_drop_work);
3460
3461 __ieee80211_disconnect(sdata);
3462 }
3463
ieee80211_beacon_loss(struct ieee80211_vif * vif)3464 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
3465 {
3466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3467 struct ieee80211_hw *hw = &sdata->local->hw;
3468
3469 trace_api_beacon_loss(sdata);
3470
3471 sdata->u.mgd.connection_loss = false;
3472 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
3473 }
3474 EXPORT_SYMBOL(ieee80211_beacon_loss);
3475
ieee80211_connection_loss(struct ieee80211_vif * vif)3476 void ieee80211_connection_loss(struct ieee80211_vif *vif)
3477 {
3478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3479 struct ieee80211_hw *hw = &sdata->local->hw;
3480
3481 trace_api_connection_loss(sdata);
3482
3483 sdata->u.mgd.connection_loss = true;
3484 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
3485 }
3486 EXPORT_SYMBOL(ieee80211_connection_loss);
3487
ieee80211_disconnect(struct ieee80211_vif * vif,bool reconnect)3488 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
3489 {
3490 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3491 struct ieee80211_hw *hw = &sdata->local->hw;
3492
3493 trace_api_disconnect(sdata, reconnect);
3494
3495 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
3496 return;
3497
3498 sdata->u.mgd.driver_disconnect = true;
3499 sdata->u.mgd.reconnect = reconnect;
3500 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
3501 }
3502 EXPORT_SYMBOL(ieee80211_disconnect);
3503
ieee80211_destroy_auth_data(struct ieee80211_sub_if_data * sdata,bool assoc)3504 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
3505 bool assoc)
3506 {
3507 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3508
3509 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3510
3511 if (!assoc) {
3512 /*
3513 * we are not authenticated yet, the only timer that could be
3514 * running is the timeout for the authentication response which
3515 * which is not relevant anymore.
3516 */
3517 del_timer_sync(&sdata->u.mgd.timer);
3518 sta_info_destroy_addr(sdata, auth_data->ap_addr);
3519
3520 /* other links are destroyed */
3521 sdata->deflink.u.mgd.conn_flags = 0;
3522 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3523 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3524 BSS_CHANGED_BSSID);
3525 sdata->u.mgd.flags = 0;
3526
3527 ieee80211_link_release_channel(&sdata->deflink);
3528 ieee80211_vif_set_links(sdata, 0, 0);
3529 }
3530
3531 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
3532 kfree(auth_data);
3533 sdata->u.mgd.auth_data = NULL;
3534 }
3535
3536 enum assoc_status {
3537 ASSOC_SUCCESS,
3538 ASSOC_REJECTED,
3539 ASSOC_TIMEOUT,
3540 ASSOC_ABANDON,
3541 };
3542
ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data * sdata,enum assoc_status status)3543 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
3544 enum assoc_status status)
3545 {
3546 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3547
3548 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3549
3550 if (status != ASSOC_SUCCESS) {
3551 /*
3552 * we are not associated yet, the only timer that could be
3553 * running is the timeout for the association response which
3554 * which is not relevant anymore.
3555 */
3556 del_timer_sync(&sdata->u.mgd.timer);
3557 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
3558
3559 sdata->deflink.u.mgd.conn_flags = 0;
3560 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3561 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3562 BSS_CHANGED_BSSID);
3563 sdata->u.mgd.flags = 0;
3564 sdata->vif.bss_conf.mu_mimo_owner = false;
3565
3566 if (status != ASSOC_REJECTED) {
3567 struct cfg80211_assoc_failure data = {
3568 .timeout = status == ASSOC_TIMEOUT,
3569 };
3570 int i;
3571
3572 BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
3573 ARRAY_SIZE(assoc_data->link));
3574
3575 for (i = 0; i < ARRAY_SIZE(data.bss); i++)
3576 data.bss[i] = assoc_data->link[i].bss;
3577
3578 if (ieee80211_vif_is_mld(&sdata->vif))
3579 data.ap_mld_addr = assoc_data->ap_addr;
3580
3581 cfg80211_assoc_failure(sdata->dev, &data);
3582 }
3583
3584 ieee80211_link_release_channel(&sdata->deflink);
3585 ieee80211_vif_set_links(sdata, 0, 0);
3586 }
3587
3588 kfree(assoc_data);
3589 sdata->u.mgd.assoc_data = NULL;
3590 }
3591
ieee80211_auth_challenge(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3592 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
3593 struct ieee80211_mgmt *mgmt, size_t len)
3594 {
3595 struct ieee80211_local *local = sdata->local;
3596 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3597 const struct element *challenge;
3598 u8 *pos;
3599 u32 tx_flags = 0;
3600 struct ieee80211_prep_tx_info info = {
3601 .subtype = IEEE80211_STYPE_AUTH,
3602 .link_id = auth_data->link_id,
3603 };
3604
3605 pos = mgmt->u.auth.variable;
3606 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
3607 len - (pos - (u8 *)mgmt));
3608 if (!challenge)
3609 return;
3610 auth_data->expected_transaction = 4;
3611 drv_mgd_prepare_tx(sdata->local, sdata, &info);
3612 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3613 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3614 IEEE80211_TX_INTFL_MLME_CONN_TX;
3615 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
3616 (void *)challenge,
3617 challenge->datalen + sizeof(*challenge),
3618 auth_data->ap_addr, auth_data->ap_addr,
3619 auth_data->key, auth_data->key_len,
3620 auth_data->key_idx, tx_flags);
3621 }
3622
ieee80211_mark_sta_auth(struct ieee80211_sub_if_data * sdata)3623 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
3624 {
3625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3626 const u8 *ap_addr = ifmgd->auth_data->ap_addr;
3627 struct sta_info *sta;
3628
3629 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3630
3631 sdata_info(sdata, "authenticated\n");
3632 ifmgd->auth_data->done = true;
3633 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3634 ifmgd->auth_data->timeout_started = true;
3635 run_again(sdata, ifmgd->auth_data->timeout);
3636
3637 /* move station state to auth */
3638 sta = sta_info_get(sdata, ap_addr);
3639 if (!sta) {
3640 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
3641 return false;
3642 }
3643 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3644 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
3645 return false;
3646 }
3647
3648 return true;
3649 }
3650
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3651 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3652 struct ieee80211_mgmt *mgmt, size_t len)
3653 {
3654 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3655 u16 auth_alg, auth_transaction, status_code;
3656 struct ieee80211_event event = {
3657 .type = MLME_EVENT,
3658 .u.mlme.data = AUTH_EVENT,
3659 };
3660 struct ieee80211_prep_tx_info info = {
3661 .subtype = IEEE80211_STYPE_AUTH,
3662 };
3663
3664 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3665
3666 if (len < 24 + 6)
3667 return;
3668
3669 if (!ifmgd->auth_data || ifmgd->auth_data->done)
3670 return;
3671
3672 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
3673 return;
3674
3675 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3676 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3677 status_code = le16_to_cpu(mgmt->u.auth.status_code);
3678
3679 if (auth_alg != ifmgd->auth_data->algorithm ||
3680 (auth_alg != WLAN_AUTH_SAE &&
3681 auth_transaction != ifmgd->auth_data->expected_transaction) ||
3682 (auth_alg == WLAN_AUTH_SAE &&
3683 (auth_transaction < ifmgd->auth_data->expected_transaction ||
3684 auth_transaction > 2))) {
3685 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3686 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3687 auth_transaction,
3688 ifmgd->auth_data->expected_transaction);
3689 goto notify_driver;
3690 }
3691
3692 if (status_code != WLAN_STATUS_SUCCESS) {
3693 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3694
3695 if (auth_alg == WLAN_AUTH_SAE &&
3696 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3697 (auth_transaction == 1 &&
3698 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3699 status_code == WLAN_STATUS_SAE_PK)))) {
3700 /* waiting for userspace now */
3701 ifmgd->auth_data->waiting = true;
3702 ifmgd->auth_data->timeout =
3703 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3704 ifmgd->auth_data->timeout_started = true;
3705 run_again(sdata, ifmgd->auth_data->timeout);
3706 goto notify_driver;
3707 }
3708
3709 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3710 mgmt->sa, status_code);
3711 ieee80211_destroy_auth_data(sdata, false);
3712 event.u.mlme.status = MLME_DENIED;
3713 event.u.mlme.reason = status_code;
3714 drv_event_callback(sdata->local, sdata, &event);
3715 goto notify_driver;
3716 }
3717
3718 switch (ifmgd->auth_data->algorithm) {
3719 case WLAN_AUTH_OPEN:
3720 case WLAN_AUTH_LEAP:
3721 case WLAN_AUTH_FT:
3722 case WLAN_AUTH_SAE:
3723 case WLAN_AUTH_FILS_SK:
3724 case WLAN_AUTH_FILS_SK_PFS:
3725 case WLAN_AUTH_FILS_PK:
3726 break;
3727 case WLAN_AUTH_SHARED_KEY:
3728 if (ifmgd->auth_data->expected_transaction != 4) {
3729 ieee80211_auth_challenge(sdata, mgmt, len);
3730 /* need another frame */
3731 return;
3732 }
3733 break;
3734 default:
3735 WARN_ONCE(1, "invalid auth alg %d",
3736 ifmgd->auth_data->algorithm);
3737 goto notify_driver;
3738 }
3739
3740 event.u.mlme.status = MLME_SUCCESS;
3741 info.success = 1;
3742 drv_event_callback(sdata->local, sdata, &event);
3743 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3744 (auth_transaction == 2 &&
3745 ifmgd->auth_data->expected_transaction == 2)) {
3746 if (!ieee80211_mark_sta_auth(sdata))
3747 return; /* ignore frame -- wait for timeout */
3748 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3749 auth_transaction == 2) {
3750 sdata_info(sdata, "SAE peer confirmed\n");
3751 ifmgd->auth_data->peer_confirmed = true;
3752 }
3753
3754 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3755 notify_driver:
3756 drv_mgd_complete_tx(sdata->local, sdata, &info);
3757 }
3758
3759 #define case_WLAN(type) \
3760 case WLAN_REASON_##type: return #type
3761
ieee80211_get_reason_code_string(u16 reason_code)3762 const char *ieee80211_get_reason_code_string(u16 reason_code)
3763 {
3764 switch (reason_code) {
3765 case_WLAN(UNSPECIFIED);
3766 case_WLAN(PREV_AUTH_NOT_VALID);
3767 case_WLAN(DEAUTH_LEAVING);
3768 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3769 case_WLAN(DISASSOC_AP_BUSY);
3770 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3771 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3772 case_WLAN(DISASSOC_STA_HAS_LEFT);
3773 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3774 case_WLAN(DISASSOC_BAD_POWER);
3775 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3776 case_WLAN(INVALID_IE);
3777 case_WLAN(MIC_FAILURE);
3778 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3779 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3780 case_WLAN(IE_DIFFERENT);
3781 case_WLAN(INVALID_GROUP_CIPHER);
3782 case_WLAN(INVALID_PAIRWISE_CIPHER);
3783 case_WLAN(INVALID_AKMP);
3784 case_WLAN(UNSUPP_RSN_VERSION);
3785 case_WLAN(INVALID_RSN_IE_CAP);
3786 case_WLAN(IEEE8021X_FAILED);
3787 case_WLAN(CIPHER_SUITE_REJECTED);
3788 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3789 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3790 case_WLAN(DISASSOC_LOW_ACK);
3791 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3792 case_WLAN(QSTA_LEAVE_QBSS);
3793 case_WLAN(QSTA_NOT_USE);
3794 case_WLAN(QSTA_REQUIRE_SETUP);
3795 case_WLAN(QSTA_TIMEOUT);
3796 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3797 case_WLAN(MESH_PEER_CANCELED);
3798 case_WLAN(MESH_MAX_PEERS);
3799 case_WLAN(MESH_CONFIG);
3800 case_WLAN(MESH_CLOSE);
3801 case_WLAN(MESH_MAX_RETRIES);
3802 case_WLAN(MESH_CONFIRM_TIMEOUT);
3803 case_WLAN(MESH_INVALID_GTK);
3804 case_WLAN(MESH_INCONSISTENT_PARAM);
3805 case_WLAN(MESH_INVALID_SECURITY);
3806 case_WLAN(MESH_PATH_ERROR);
3807 case_WLAN(MESH_PATH_NOFORWARD);
3808 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3809 case_WLAN(MAC_EXISTS_IN_MBSS);
3810 case_WLAN(MESH_CHAN_REGULATORY);
3811 case_WLAN(MESH_CHAN);
3812 default: return "<unknown>";
3813 }
3814 }
3815
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3816 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3817 struct ieee80211_mgmt *mgmt, size_t len)
3818 {
3819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3820 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3821
3822 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3823
3824 if (len < 24 + 2)
3825 return;
3826
3827 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3828 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3829 return;
3830 }
3831
3832 if (ifmgd->associated &&
3833 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
3834 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3835 sdata->vif.cfg.ap_addr, reason_code,
3836 ieee80211_get_reason_code_string(reason_code));
3837
3838 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3839
3840 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3841 reason_code, false);
3842 return;
3843 }
3844
3845 if (ifmgd->assoc_data &&
3846 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
3847 sdata_info(sdata,
3848 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3849 ifmgd->assoc_data->ap_addr, reason_code,
3850 ieee80211_get_reason_code_string(reason_code));
3851
3852 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
3853
3854 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3855 return;
3856 }
3857 }
3858
3859
ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3860 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3861 struct ieee80211_mgmt *mgmt, size_t len)
3862 {
3863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3864 u16 reason_code;
3865
3866 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3867
3868 if (len < 24 + 2)
3869 return;
3870
3871 if (!ifmgd->associated ||
3872 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
3873 return;
3874
3875 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3876
3877 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3878 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3879 return;
3880 }
3881
3882 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3883 sdata->vif.cfg.ap_addr, reason_code,
3884 ieee80211_get_reason_code_string(reason_code));
3885
3886 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3887
3888 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3889 false);
3890 }
3891
ieee80211_get_rates(struct ieee80211_supported_band * sband,u8 * supp_rates,unsigned int supp_rates_len,u32 * rates,u32 * basic_rates,bool * have_higher_than_11mbit,int * min_rate,int * min_rate_index)3892 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3893 u8 *supp_rates, unsigned int supp_rates_len,
3894 u32 *rates, u32 *basic_rates,
3895 bool *have_higher_than_11mbit,
3896 int *min_rate, int *min_rate_index)
3897 {
3898 int i, j;
3899
3900 for (i = 0; i < supp_rates_len; i++) {
3901 int rate = supp_rates[i] & 0x7f;
3902 bool is_basic = !!(supp_rates[i] & 0x80);
3903
3904 if ((rate * 5) > 110)
3905 *have_higher_than_11mbit = true;
3906
3907 /*
3908 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership
3909 * selectors since they're not rates.
3910 *
3911 * Note: Even though the membership selector and the basic
3912 * rate flag share the same bit, they are not exactly
3913 * the same.
3914 */
3915 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3916 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3917 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3918 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) ||
3919 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3920 continue;
3921
3922 for (j = 0; j < sband->n_bitrates; j++) {
3923 struct ieee80211_rate *br;
3924 int brate;
3925
3926 br = &sband->bitrates[j];
3927
3928 brate = DIV_ROUND_UP(br->bitrate, 5);
3929 if (brate == rate) {
3930 *rates |= BIT(j);
3931 if (is_basic)
3932 *basic_rates |= BIT(j);
3933 if ((rate * 5) < *min_rate) {
3934 *min_rate = rate * 5;
3935 *min_rate_index = j;
3936 }
3937 break;
3938 }
3939 }
3940 }
3941 }
3942
ieee80211_twt_req_supported(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct link_sta_info * link_sta,const struct ieee802_11_elems * elems)3943 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata,
3944 struct ieee80211_supported_band *sband,
3945 const struct link_sta_info *link_sta,
3946 const struct ieee802_11_elems *elems)
3947 {
3948 const struct ieee80211_sta_he_cap *own_he_cap =
3949 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
3950
3951 if (elems->ext_capab_len < 10)
3952 return false;
3953
3954 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3955 return false;
3956
3957 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
3958 IEEE80211_HE_MAC_CAP0_TWT_RES &&
3959 own_he_cap &&
3960 (own_he_cap->he_cap_elem.mac_cap_info[0] &
3961 IEEE80211_HE_MAC_CAP0_TWT_REQ);
3962 }
3963
ieee80211_recalc_twt_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct ieee802_11_elems * elems)3964 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
3965 struct ieee80211_supported_band *sband,
3966 struct ieee80211_link_data *link,
3967 struct link_sta_info *link_sta,
3968 struct ieee802_11_elems *elems)
3969 {
3970 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems);
3971
3972 if (link->conf->twt_requester != twt) {
3973 link->conf->twt_requester = twt;
3974 return BSS_CHANGED_TWT;
3975 }
3976 return 0;
3977 }
3978
ieee80211_twt_bcast_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_bss_conf * bss_conf,struct ieee80211_supported_band * sband,struct link_sta_info * link_sta)3979 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3980 struct ieee80211_bss_conf *bss_conf,
3981 struct ieee80211_supported_band *sband,
3982 struct link_sta_info *link_sta)
3983 {
3984 const struct ieee80211_sta_he_cap *own_he_cap =
3985 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
3986
3987 return bss_conf->he_support &&
3988 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
3989 IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3990 own_he_cap &&
3991 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3992 IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3993 }
3994
ieee80211_assoc_config_link(struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct cfg80211_bss * cbss,struct ieee80211_mgmt * mgmt,const u8 * elem_start,unsigned int elem_len,u64 * changed)3995 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
3996 struct link_sta_info *link_sta,
3997 struct cfg80211_bss *cbss,
3998 struct ieee80211_mgmt *mgmt,
3999 const u8 *elem_start,
4000 unsigned int elem_len,
4001 u64 *changed)
4002 {
4003 struct ieee80211_sub_if_data *sdata = link->sdata;
4004 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4005 struct ieee80211_bss_conf *bss_conf = link->conf;
4006 struct ieee80211_local *local = sdata->local;
4007 unsigned int link_id = link->link_id;
4008 struct ieee80211_elems_parse_params parse_params = {
4009 .start = elem_start,
4010 .len = elem_len,
4011 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id,
4012 .from_ap = true,
4013 };
4014 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4015 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
4016 const struct cfg80211_bss_ies *bss_ies = NULL;
4017 struct ieee80211_supported_band *sband;
4018 struct ieee802_11_elems *elems;
4019 const __le16 prof_bss_param_ch_present =
4020 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT);
4021 u16 capab_info;
4022 bool ret;
4023
4024 elems = ieee802_11_parse_elems_full(&parse_params);
4025 if (!elems)
4026 return false;
4027
4028 if (link_id == assoc_data->assoc_link_id) {
4029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
4030
4031 /*
4032 * we should not get to this flow unless the association was
4033 * successful, so set the status directly to success
4034 */
4035 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS;
4036 if (elems->ml_basic) {
4037 if (!(elems->ml_basic->control &
4038 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT))) {
4039 ret = false;
4040 goto out;
4041 }
4042 link->u.mgd.bss_param_ch_cnt =
4043 ieee80211_mle_get_bss_param_ch_cnt(elems->ml_basic);
4044 }
4045 } else if (!elems->prof ||
4046 !(elems->prof->control & prof_bss_param_ch_present)) {
4047 ret = false;
4048 goto out;
4049 } else {
4050 const u8 *ptr = elems->prof->variable +
4051 elems->prof->sta_info_len - 1;
4052
4053 /*
4054 * During parsing, we validated that these fields exist,
4055 * otherwise elems->prof would have been set to NULL.
4056 */
4057 capab_info = get_unaligned_le16(ptr);
4058 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2);
4059 link->u.mgd.bss_param_ch_cnt =
4060 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof);
4061
4062 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
4063 link_info(link, "association response status code=%u\n",
4064 assoc_data->link[link_id].status);
4065 ret = true;
4066 goto out;
4067 }
4068 }
4069
4070 if (!is_s1g && !elems->supp_rates) {
4071 sdata_info(sdata, "no SuppRates element in AssocResp\n");
4072 ret = false;
4073 goto out;
4074 }
4075
4076 link->u.mgd.tdls_chan_switch_prohibited =
4077 elems->ext_capab && elems->ext_capab_len >= 5 &&
4078 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
4079
4080 /*
4081 * Some APs are erroneously not including some information in their
4082 * (re)association response frames. Try to recover by using the data
4083 * from the beacon or probe response. This seems to afflict mobile
4084 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
4085 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
4086 */
4087 if (!is_6ghz &&
4088 ((assoc_data->wmm && !elems->wmm_param) ||
4089 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4090 (!elems->ht_cap_elem || !elems->ht_operation)) ||
4091 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4092 (!elems->vht_cap_elem || !elems->vht_operation)))) {
4093 const struct cfg80211_bss_ies *ies;
4094 struct ieee802_11_elems *bss_elems;
4095
4096 rcu_read_lock();
4097 ies = rcu_dereference(cbss->ies);
4098 if (ies)
4099 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
4100 GFP_ATOMIC);
4101 rcu_read_unlock();
4102 if (!bss_ies) {
4103 ret = false;
4104 goto out;
4105 }
4106
4107 parse_params.start = bss_ies->data;
4108 parse_params.len = bss_ies->len;
4109 parse_params.bss = cbss;
4110 bss_elems = ieee802_11_parse_elems_full(&parse_params);
4111 if (!bss_elems) {
4112 ret = false;
4113 goto out;
4114 }
4115
4116 if (assoc_data->wmm &&
4117 !elems->wmm_param && bss_elems->wmm_param) {
4118 elems->wmm_param = bss_elems->wmm_param;
4119 sdata_info(sdata,
4120 "AP bug: WMM param missing from AssocResp\n");
4121 }
4122
4123 /*
4124 * Also check if we requested HT/VHT, otherwise the AP doesn't
4125 * have to include the IEs in the (re)association response.
4126 */
4127 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4128 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4129 elems->ht_cap_elem = bss_elems->ht_cap_elem;
4130 sdata_info(sdata,
4131 "AP bug: HT capability missing from AssocResp\n");
4132 }
4133 if (!elems->ht_operation && bss_elems->ht_operation &&
4134 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4135 elems->ht_operation = bss_elems->ht_operation;
4136 sdata_info(sdata,
4137 "AP bug: HT operation missing from AssocResp\n");
4138 }
4139 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4140 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4141 elems->vht_cap_elem = bss_elems->vht_cap_elem;
4142 sdata_info(sdata,
4143 "AP bug: VHT capa missing from AssocResp\n");
4144 }
4145 if (!elems->vht_operation && bss_elems->vht_operation &&
4146 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4147 elems->vht_operation = bss_elems->vht_operation;
4148 sdata_info(sdata,
4149 "AP bug: VHT operation missing from AssocResp\n");
4150 }
4151
4152 kfree(bss_elems);
4153 }
4154
4155 /*
4156 * We previously checked these in the beacon/probe response, so
4157 * they should be present here. This is just a safety net.
4158 */
4159 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4160 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4161 sdata_info(sdata,
4162 "HT AP is missing WMM params or HT capability/operation\n");
4163 ret = false;
4164 goto out;
4165 }
4166
4167 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4168 (!elems->vht_cap_elem || !elems->vht_operation)) {
4169 sdata_info(sdata,
4170 "VHT AP is missing VHT capability/operation\n");
4171 ret = false;
4172 goto out;
4173 }
4174
4175 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4176 !elems->he_6ghz_capa) {
4177 sdata_info(sdata,
4178 "HE 6 GHz AP is missing HE 6 GHz band capability\n");
4179 ret = false;
4180 goto out;
4181 }
4182
4183 if (WARN_ON(!link->conf->chandef.chan)) {
4184 ret = false;
4185 goto out;
4186 }
4187 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
4188
4189 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4190 (!elems->he_cap || !elems->he_operation)) {
4191 sdata_info(sdata,
4192 "HE AP is missing HE capability/operation\n");
4193 ret = false;
4194 goto out;
4195 }
4196
4197 /* Set up internal HT/VHT capabilities */
4198 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
4199 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4200 elems->ht_cap_elem,
4201 link_sta);
4202
4203 if (elems->vht_cap_elem &&
4204 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4205 const struct ieee80211_vht_cap *bss_vht_cap = NULL;
4206 const struct cfg80211_bss_ies *ies;
4207
4208 /*
4209 * Cisco AP module 9115 with FW 17.3 has a bug and sends a
4210 * too large maximum MPDU length in the association response
4211 * (indicating 12k) that it cannot actually process ...
4212 * Work around that.
4213 */
4214 rcu_read_lock();
4215 ies = rcu_dereference(cbss->ies);
4216 if (ies) {
4217 const struct element *elem;
4218
4219 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY,
4220 ies->data, ies->len);
4221 if (elem && elem->datalen >= sizeof(*bss_vht_cap))
4222 bss_vht_cap = (const void *)elem->data;
4223 }
4224
4225 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4226 elems->vht_cap_elem,
4227 bss_vht_cap, link_sta);
4228 rcu_read_unlock();
4229 }
4230
4231 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4232 elems->he_cap) {
4233 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4234 elems->he_cap,
4235 elems->he_cap_len,
4236 elems->he_6ghz_capa,
4237 link_sta);
4238
4239 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4240 if (elems->rsnx && elems->rsnx_len &&
4241 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4242 wiphy_ext_feature_isset(local->hw.wiphy,
4243 NL80211_EXT_FEATURE_PROTECTED_TWT))
4244 bss_conf->twt_protected = true;
4245 else
4246 bss_conf->twt_protected = false;
4247
4248 *changed |= ieee80211_recalc_twt_req(sdata, sband, link,
4249 link_sta, elems);
4250
4251 if (elems->eht_operation && elems->eht_cap &&
4252 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
4253 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4254 elems->he_cap,
4255 elems->he_cap_len,
4256 elems->eht_cap,
4257 elems->eht_cap_len,
4258 link_sta);
4259
4260 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4261 *changed |= BSS_CHANGED_EHT_PUNCTURING;
4262 } else {
4263 bss_conf->eht_support = false;
4264 }
4265 } else {
4266 bss_conf->he_support = false;
4267 bss_conf->twt_requester = false;
4268 bss_conf->twt_protected = false;
4269 bss_conf->eht_support = false;
4270 }
4271
4272 bss_conf->twt_broadcast =
4273 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4274
4275 if (bss_conf->he_support) {
4276 bss_conf->he_bss_color.color =
4277 le32_get_bits(elems->he_operation->he_oper_params,
4278 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4279 bss_conf->he_bss_color.partial =
4280 le32_get_bits(elems->he_operation->he_oper_params,
4281 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4282 bss_conf->he_bss_color.enabled =
4283 !le32_get_bits(elems->he_operation->he_oper_params,
4284 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4285
4286 if (bss_conf->he_bss_color.enabled)
4287 *changed |= BSS_CHANGED_HE_BSS_COLOR;
4288
4289 bss_conf->htc_trig_based_pkt_ext =
4290 le32_get_bits(elems->he_operation->he_oper_params,
4291 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4292 bss_conf->frame_time_rts_th =
4293 le32_get_bits(elems->he_operation->he_oper_params,
4294 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4295
4296 bss_conf->uora_exists = !!elems->uora_element;
4297 if (elems->uora_element)
4298 bss_conf->uora_ocw_range = elems->uora_element[0];
4299
4300 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4301 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4302 /* TODO: OPEN: what happens if BSS color disable is set? */
4303 }
4304
4305 if (cbss->transmitted_bss) {
4306 bss_conf->nontransmitted = true;
4307 ether_addr_copy(bss_conf->transmitter_bssid,
4308 cbss->transmitted_bss->bssid);
4309 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4310 bss_conf->bssid_index = cbss->bssid_index;
4311 }
4312
4313 /*
4314 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4315 * in their association response, so ignore that data for our own
4316 * configuration. If it changed since the last beacon, we'll get the
4317 * next beacon and update then.
4318 */
4319
4320 /*
4321 * If an operating mode notification IE is present, override the
4322 * NSS calculation (that would be done in rate_control_rate_init())
4323 * and use the # of streams from that element.
4324 */
4325 if (elems->opmode_notif &&
4326 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4327 u8 nss;
4328
4329 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4330 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4331 nss += 1;
4332 link_sta->pub->rx_nss = nss;
4333 }
4334
4335 /*
4336 * Always handle WMM once after association regardless
4337 * of the first value the AP uses. Setting -1 here has
4338 * that effect because the AP values is an unsigned
4339 * 4-bit value.
4340 */
4341 link->u.mgd.wmm_last_param_set = -1;
4342 link->u.mgd.mu_edca_last_param_set = -1;
4343
4344 if (link->u.mgd.disable_wmm_tracking) {
4345 ieee80211_set_wmm_default(link, false, false);
4346 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4347 elems->wmm_param_len,
4348 elems->mu_edca_param_set)) {
4349 /* still enable QoS since we might have HT/VHT */
4350 ieee80211_set_wmm_default(link, false, true);
4351 /* disable WMM tracking in this case to disable
4352 * tracking WMM parameter changes in the beacon if
4353 * the parameters weren't actually valid. Doing so
4354 * avoids changing parameters very strangely when
4355 * the AP is going back and forth between valid and
4356 * invalid parameters.
4357 */
4358 link->u.mgd.disable_wmm_tracking = true;
4359 }
4360
4361 if (elems->max_idle_period_ie) {
4362 bss_conf->max_idle_period =
4363 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4364 bss_conf->protected_keep_alive =
4365 !!(elems->max_idle_period_ie->idle_options &
4366 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4367 *changed |= BSS_CHANGED_KEEP_ALIVE;
4368 } else {
4369 bss_conf->max_idle_period = 0;
4370 bss_conf->protected_keep_alive = false;
4371 }
4372
4373 /* set assoc capability (AID was already set earlier),
4374 * ieee80211_set_associated() will tell the driver */
4375 bss_conf->assoc_capability = capab_info;
4376
4377 ret = true;
4378 out:
4379 kfree(elems);
4380 kfree(bss_ies);
4381 return ret;
4382 }
4383
ieee80211_mgd_setup_link_sta(struct ieee80211_link_data * link,struct sta_info * sta,struct link_sta_info * link_sta,struct cfg80211_bss * cbss)4384 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
4385 struct sta_info *sta,
4386 struct link_sta_info *link_sta,
4387 struct cfg80211_bss *cbss)
4388 {
4389 struct ieee80211_sub_if_data *sdata = link->sdata;
4390 struct ieee80211_local *local = sdata->local;
4391 struct ieee80211_bss *bss = (void *)cbss->priv;
4392 u32 rates = 0, basic_rates = 0;
4393 bool have_higher_than_11mbit = false;
4394 int min_rate = INT_MAX, min_rate_index = -1;
4395 struct ieee80211_supported_band *sband;
4396
4397 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
4398 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
4399
4400 /* TODO: S1G Basic Rate Set is expressed elsewhere */
4401 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
4402 ieee80211_s1g_sta_rate_init(sta);
4403 return 0;
4404 }
4405
4406 sband = local->hw.wiphy->bands[cbss->channel->band];
4407
4408 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
4409 &rates, &basic_rates, &have_higher_than_11mbit,
4410 &min_rate, &min_rate_index);
4411
4412 /*
4413 * This used to be a workaround for basic rates missing
4414 * in the association response frame. Now that we no
4415 * longer use the basic rates from there, it probably
4416 * doesn't happen any more, but keep the workaround so
4417 * in case some *other* APs are buggy in different ways
4418 * we can connect -- with a warning.
4419 * Allow this workaround only in case the AP provided at least
4420 * one rate.
4421 */
4422 if (min_rate_index < 0) {
4423 link_info(link, "No legacy rates in association response\n");
4424 return -EINVAL;
4425 } else if (!basic_rates) {
4426 link_info(link, "No basic rates, using min rate instead\n");
4427 basic_rates = BIT(min_rate_index);
4428 }
4429
4430 if (rates)
4431 link_sta->pub->supp_rates[cbss->channel->band] = rates;
4432 else
4433 link_info(link, "No rates found, keeping mandatory only\n");
4434
4435 link->conf->basic_rates = basic_rates;
4436
4437 /* cf. IEEE 802.11 9.2.12 */
4438 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
4439 have_higher_than_11mbit;
4440
4441 return 0;
4442 }
4443
ieee80211_max_rx_chains(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)4444 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
4445 struct cfg80211_bss *cbss)
4446 {
4447 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4448 const struct element *ht_cap_elem, *vht_cap_elem;
4449 const struct cfg80211_bss_ies *ies;
4450 const struct ieee80211_ht_cap *ht_cap;
4451 const struct ieee80211_vht_cap *vht_cap;
4452 const struct ieee80211_he_cap_elem *he_cap;
4453 const struct element *he_cap_elem;
4454 u16 mcs_80_map, mcs_160_map;
4455 int i, mcs_nss_size;
4456 bool support_160;
4457 u8 chains = 1;
4458
4459 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
4460 return chains;
4461
4462 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
4463 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
4464 ht_cap = (void *)ht_cap_elem->data;
4465 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4466 /*
4467 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4468 * "Tx Unequal Modulation Supported" fields.
4469 */
4470 }
4471
4472 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
4473 return chains;
4474
4475 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
4476 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
4477 u8 nss;
4478 u16 tx_mcs_map;
4479
4480 vht_cap = (void *)vht_cap_elem->data;
4481 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4482 for (nss = 8; nss > 0; nss--) {
4483 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4484 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4485 break;
4486 }
4487 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4488 chains = max(chains, nss);
4489 }
4490
4491 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
4492 return chains;
4493
4494 ies = rcu_dereference(cbss->ies);
4495 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4496 ies->data, ies->len);
4497
4498 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
4499 return chains;
4500
4501 /* skip one byte ext_tag_id */
4502 he_cap = (void *)(he_cap_elem->data + 1);
4503 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4504
4505 /* invalid HE IE */
4506 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
4507 return chains;
4508
4509 /* mcs_nss is right after he_cap info */
4510 he_mcs_nss_supp = (void *)(he_cap + 1);
4511
4512 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4513
4514 for (i = 7; i >= 0; i--) {
4515 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
4516
4517 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4518 chains = max_t(u8, chains, i + 1);
4519 break;
4520 }
4521 }
4522
4523 support_160 = he_cap->phy_cap_info[0] &
4524 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
4525
4526 if (!support_160)
4527 return chains;
4528
4529 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
4530 for (i = 7; i >= 0; i--) {
4531 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
4532
4533 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4534 chains = max_t(u8, chains, i + 1);
4535 break;
4536 }
4537 }
4538
4539 return chains;
4540 }
4541
4542 static bool
ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data * sdata,const struct cfg80211_bss_ies * ies,const struct ieee80211_he_operation * he_op)4543 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4544 const struct cfg80211_bss_ies *ies,
4545 const struct ieee80211_he_operation *he_op)
4546 {
4547 const struct element *he_cap_elem;
4548 const struct ieee80211_he_cap_elem *he_cap;
4549 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4550 u16 mcs_80_map_tx, mcs_80_map_rx;
4551 u16 ap_min_req_set;
4552 int mcs_nss_size;
4553 int nss;
4554
4555 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4556 ies->data, ies->len);
4557
4558 if (!he_cap_elem)
4559 return false;
4560
4561 /* invalid HE IE */
4562 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
4563 sdata_info(sdata,
4564 "Invalid HE elem, Disable HE\n");
4565 return false;
4566 }
4567
4568 /* skip one byte ext_tag_id */
4569 he_cap = (void *)(he_cap_elem->data + 1);
4570 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4571
4572 /* invalid HE IE */
4573 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
4574 sdata_info(sdata,
4575 "Invalid HE elem with nss size, Disable HE\n");
4576 return false;
4577 }
4578
4579 /* mcs_nss is right after he_cap info */
4580 he_mcs_nss_supp = (void *)(he_cap + 1);
4581
4582 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4583 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
4584
4585 /* P802.11-REVme/D0.3
4586 * 27.1.1 Introduction to the HE PHY
4587 * ...
4588 * An HE STA shall support the following features:
4589 * ...
4590 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
4591 * supported channel widths for HE SU PPDUs
4592 */
4593 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4594 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
4595 sdata_info(sdata,
4596 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
4597 mcs_80_map_tx, mcs_80_map_rx);
4598 return false;
4599 }
4600
4601 if (!he_op)
4602 return true;
4603
4604 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4605
4606 /*
4607 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4608 * zeroes, which is nonsense, and completely inconsistent with itself
4609 * (it doesn't have 8 streams). Accept the settings in this case anyway.
4610 */
4611 if (!ap_min_req_set)
4612 return true;
4613
4614 /* make sure the AP is consistent with itself
4615 *
4616 * P802.11-REVme/D0.3
4617 * 26.17.1 Basic HE BSS operation
4618 *
4619 * A STA that is operating in an HE BSS shall be able to receive and
4620 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
4621 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
4622 * MLME-START.request primitive and shall be able to receive at each of
4623 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
4624 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
4625 * primitive
4626 */
4627 for (nss = 8; nss > 0; nss--) {
4628 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4629 u8 ap_rx_val;
4630 u8 ap_tx_val;
4631
4632 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4633 continue;
4634
4635 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
4636 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
4637
4638 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4639 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4640 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
4641 sdata_info(sdata,
4642 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
4643 nss, ap_rx_val, ap_rx_val, ap_op_val);
4644 return false;
4645 }
4646 }
4647
4648 return true;
4649 }
4650
4651 static bool
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_he_operation * he_op)4652 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4653 struct ieee80211_supported_band *sband,
4654 const struct ieee80211_he_operation *he_op)
4655 {
4656 const struct ieee80211_sta_he_cap *sta_he_cap =
4657 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4658 u16 ap_min_req_set;
4659 int i;
4660
4661 if (!sta_he_cap || !he_op)
4662 return false;
4663
4664 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4665
4666 /*
4667 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4668 * zeroes, which is nonsense, and completely inconsistent with itself
4669 * (it doesn't have 8 streams). Accept the settings in this case anyway.
4670 */
4671 if (!ap_min_req_set)
4672 return true;
4673
4674 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4675 for (i = 0; i < 3; i++) {
4676 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4677 &sta_he_cap->he_mcs_nss_supp;
4678 u16 sta_mcs_map_rx =
4679 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4680 u16 sta_mcs_map_tx =
4681 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4682 u8 nss;
4683 bool verified = true;
4684
4685 /*
4686 * For each band there is a maximum of 8 spatial streams
4687 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4688 * of 2 bits per NSS (1-8), with the values defined in enum
4689 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4690 * capabilities aren't less than the AP's minimum requirements
4691 * for this HE BSS per SS.
4692 * It is enough to find one such band that meets the reqs.
4693 */
4694 for (nss = 8; nss > 0; nss--) {
4695 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4696 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4697 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4698
4699 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4700 continue;
4701
4702 /*
4703 * Make sure the HE AP doesn't require MCSs that aren't
4704 * supported by the client as required by spec
4705 *
4706 * P802.11-REVme/D0.3
4707 * 26.17.1 Basic HE BSS operation
4708 *
4709 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
4710 * a BSS, unless it supports (i.e., is able to both transmit and
4711 * receive using) all of the <HE-MCS, NSS> tuples in the basic
4712 * HE-MCS and NSS set.
4713 */
4714 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4715 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4716 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4717 verified = false;
4718 break;
4719 }
4720 }
4721
4722 if (verified)
4723 return true;
4724 }
4725
4726 /* If here, STA doesn't meet AP's HE min requirements */
4727 return false;
4728 }
4729
4730 static u8
ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap * sta_he_cap,const struct ieee80211_sta_eht_cap * sta_eht_cap,unsigned int idx,int bw)4731 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap,
4732 const struct ieee80211_sta_eht_cap *sta_eht_cap,
4733 unsigned int idx, int bw)
4734 {
4735 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0];
4736 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0];
4737
4738 /* handle us being a 20 MHz-only EHT STA - with four values
4739 * for MCS 0-7, 8-9, 10-11, 12-13.
4740 */
4741 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL))
4742 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx];
4743
4744 /* the others have MCS 0-9 together, rather than separately from 0-7 */
4745 if (idx > 0)
4746 idx--;
4747
4748 switch (bw) {
4749 case 0:
4750 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx];
4751 case 1:
4752 if (!(he_phy_cap0 &
4753 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
4754 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)))
4755 return 0xff; /* pass check */
4756 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx];
4757 case 2:
4758 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ))
4759 return 0xff; /* pass check */
4760 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx];
4761 }
4762
4763 WARN_ON(1);
4764 return 0;
4765 }
4766
4767 static bool
ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_eht_operation * eht_op)4768 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata,
4769 struct ieee80211_supported_band *sband,
4770 const struct ieee80211_eht_operation *eht_op)
4771 {
4772 const struct ieee80211_sta_he_cap *sta_he_cap =
4773 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4774 const struct ieee80211_sta_eht_cap *sta_eht_cap =
4775 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4776 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req;
4777 unsigned int i;
4778
4779 if (!sta_he_cap || !sta_eht_cap || !eht_op)
4780 return false;
4781
4782 req = &eht_op->basic_mcs_nss;
4783
4784 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) {
4785 u8 req_rx_nss, req_tx_nss;
4786 unsigned int bw;
4787
4788 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i],
4789 IEEE80211_EHT_MCS_NSS_RX);
4790 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i],
4791 IEEE80211_EHT_MCS_NSS_TX);
4792
4793 for (bw = 0; bw < 3; bw++) {
4794 u8 have, have_rx_nss, have_tx_nss;
4795
4796 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap,
4797 sta_eht_cap,
4798 i, bw);
4799 have_rx_nss = u8_get_bits(have,
4800 IEEE80211_EHT_MCS_NSS_RX);
4801 have_tx_nss = u8_get_bits(have,
4802 IEEE80211_EHT_MCS_NSS_TX);
4803
4804 if (req_rx_nss > have_rx_nss ||
4805 req_tx_nss > have_tx_nss)
4806 return false;
4807 }
4808 }
4809
4810 return true;
4811 }
4812
ieee80211_prep_channel(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,struct cfg80211_bss * cbss,bool mlo,ieee80211_conn_flags_t * conn_flags)4813 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4814 struct ieee80211_link_data *link,
4815 struct cfg80211_bss *cbss,
4816 bool mlo,
4817 ieee80211_conn_flags_t *conn_flags)
4818 {
4819 struct ieee80211_local *local = sdata->local;
4820 const struct ieee80211_ht_cap *ht_cap = NULL;
4821 const struct ieee80211_ht_operation *ht_oper = NULL;
4822 const struct ieee80211_vht_operation *vht_oper = NULL;
4823 const struct ieee80211_he_operation *he_oper = NULL;
4824 const struct ieee80211_eht_operation *eht_oper = NULL;
4825 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4826 struct ieee80211_supported_band *sband;
4827 struct cfg80211_chan_def chandef;
4828 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4829 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4830 bool supports_mlo = false;
4831 struct ieee80211_bss *bss = (void *)cbss->priv;
4832 struct ieee80211_elems_parse_params parse_params = {
4833 .link_id = -1,
4834 .from_ap = true,
4835 };
4836 struct ieee802_11_elems *elems;
4837 const struct cfg80211_bss_ies *ies;
4838 int ret;
4839 u32 i;
4840 bool have_80mhz;
4841
4842 lockdep_assert_wiphy(local->hw.wiphy);
4843
4844 rcu_read_lock();
4845
4846 ies = rcu_dereference(cbss->ies);
4847 parse_params.start = ies->data;
4848 parse_params.len = ies->len;
4849 elems = ieee802_11_parse_elems_full(&parse_params);
4850 if (!elems) {
4851 rcu_read_unlock();
4852 return -ENOMEM;
4853 }
4854
4855 sband = local->hw.wiphy->bands[cbss->channel->band];
4856
4857 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
4858 IEEE80211_CONN_DISABLE_80P80MHZ |
4859 IEEE80211_CONN_DISABLE_160MHZ);
4860
4861 /* disable HT/VHT/HE if we don't support them */
4862 if (!sband->ht_cap.ht_supported && !is_6ghz) {
4863 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
4864 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4865 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4866 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4867 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4868 }
4869
4870 if (!sband->vht_cap.vht_supported && is_5ghz) {
4871 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
4872 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4873 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4874 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4875 }
4876
4877 if (!ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif)) {
4878 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
4879 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4880 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4881 }
4882
4883 if (!ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) {
4884 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
4885 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4886 }
4887
4888 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
4889 ht_oper = elems->ht_operation;
4890 ht_cap = elems->ht_cap_elem;
4891
4892 if (!ht_cap) {
4893 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4894 ht_oper = NULL;
4895 }
4896 }
4897
4898 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
4899 vht_oper = elems->vht_operation;
4900 if (vht_oper && !ht_oper) {
4901 vht_oper = NULL;
4902 sdata_info(sdata,
4903 "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4904 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4905 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4906 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4907 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4908 }
4909
4910 if (!elems->vht_cap_elem) {
4911 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4912 vht_oper = NULL;
4913 }
4914 }
4915
4916 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
4917 he_oper = elems->he_operation;
4918
4919 if (link && is_6ghz) {
4920 struct ieee80211_bss_conf *bss_conf;
4921 u8 j = 0;
4922
4923 bss_conf = link->conf;
4924
4925 if (elems->pwr_constr_elem)
4926 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
4927
4928 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
4929 ARRAY_SIZE(elems->tx_pwr_env));
4930
4931 for (i = 0; i < elems->tx_pwr_env_num; i++) {
4932 if (elems->tx_pwr_env_len[i] >
4933 sizeof(bss_conf->tx_pwr_env[j]))
4934 continue;
4935
4936 bss_conf->tx_pwr_env_num++;
4937 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
4938 elems->tx_pwr_env_len[i]);
4939 j++;
4940 }
4941 }
4942
4943 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
4944 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
4945 *conn_flags |= IEEE80211_CONN_DISABLE_HE |
4946 IEEE80211_CONN_DISABLE_EHT;
4947 }
4948
4949 /*
4950 * EHT requires HE to be supported as well. Specifically for 6 GHz
4951 * channels, the operation channel information can only be deduced from
4952 * both the 6 GHz operation information (from the HE operation IE) and
4953 * EHT operation.
4954 */
4955 if (!(*conn_flags &
4956 (IEEE80211_CONN_DISABLE_HE |
4957 IEEE80211_CONN_DISABLE_EHT)) &&
4958 he_oper) {
4959 const struct cfg80211_bss_ies *cbss_ies;
4960 const struct element *eht_ml_elem;
4961 const u8 *eht_oper_ie;
4962
4963 cbss_ies = rcu_dereference(cbss->ies);
4964 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
4965 cbss_ies->data, cbss_ies->len);
4966 if (eht_oper_ie && eht_oper_ie[1] >=
4967 1 + sizeof(struct ieee80211_eht_operation))
4968 eht_oper = (void *)(eht_oper_ie + 3);
4969 else
4970 eht_oper = NULL;
4971
4972 if (!ieee80211_verify_sta_eht_mcs_support(sdata, sband, eht_oper))
4973 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4974
4975 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
4976 cbss_ies->data, cbss_ies->len);
4977
4978 /* data + 1 / datalen - 1 since it's an extended element */
4979 if (!(*conn_flags & IEEE80211_CONN_DISABLE_EHT) &&
4980 eht_ml_elem &&
4981 ieee80211_mle_type_ok(eht_ml_elem->data + 1,
4982 IEEE80211_ML_CONTROL_TYPE_BASIC,
4983 eht_ml_elem->datalen - 1)) {
4984 supports_mlo = true;
4985
4986 sdata->vif.cfg.eml_cap =
4987 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1);
4988 sdata->vif.cfg.eml_med_sync_delay =
4989 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1);
4990 }
4991 }
4992
4993 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4994 have_80mhz = false;
4995 for (i = 0; i < sband->n_channels; i++) {
4996 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4997 IEEE80211_CHAN_NO_80MHZ))
4998 continue;
4999
5000 have_80mhz = true;
5001 break;
5002 }
5003
5004 if (!have_80mhz) {
5005 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
5006 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
5007 }
5008
5009 if (sband->band == NL80211_BAND_S1GHZ) {
5010 s1g_oper = elems->s1g_oper;
5011 if (!s1g_oper)
5012 sdata_info(sdata,
5013 "AP missing S1G operation element?\n");
5014 }
5015
5016 *conn_flags |=
5017 ieee80211_determine_chantype(sdata, link, *conn_flags,
5018 sband,
5019 cbss->channel,
5020 bss->vht_cap_info,
5021 ht_oper, vht_oper,
5022 he_oper, eht_oper,
5023 s1g_oper,
5024 &chandef, false);
5025
5026 if (link)
5027 link->needed_rx_chains =
5028 min(ieee80211_max_rx_chains(link, cbss),
5029 local->rx_chains);
5030
5031 rcu_read_unlock();
5032 /* the element data was RCU protected so no longer valid anyway */
5033 kfree(elems);
5034 elems = NULL;
5035
5036 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
5037 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
5038 return -EINVAL;
5039 }
5040
5041 if (mlo && !supports_mlo) {
5042 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n");
5043 return -EINVAL;
5044 }
5045
5046 if (!link)
5047 return 0;
5048
5049 /*
5050 * If this fails (possibly due to channel context sharing
5051 * on incompatible channels, e.g. 80+80 and 160 sharing the
5052 * same control channel) try to use a smaller bandwidth.
5053 */
5054 ret = ieee80211_link_use_channel(link, &chandef,
5055 IEEE80211_CHANCTX_SHARED);
5056
5057 /* don't downgrade for 5 and 10 MHz channels, though. */
5058 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
5059 chandef.width == NL80211_CHAN_WIDTH_10)
5060 goto out;
5061
5062 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
5063 *conn_flags |=
5064 ieee80211_chandef_downgrade(&chandef);
5065 ret = ieee80211_link_use_channel(link, &chandef,
5066 IEEE80211_CHANCTX_SHARED);
5067 }
5068 out:
5069 return ret;
5070 }
5071
ieee80211_get_dtim(const struct cfg80211_bss_ies * ies,u8 * dtim_count,u8 * dtim_period)5072 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
5073 u8 *dtim_count, u8 *dtim_period)
5074 {
5075 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5076 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5077 ies->len);
5078 const struct ieee80211_tim_ie *tim = NULL;
5079 const struct ieee80211_bssid_index *idx;
5080 bool valid = tim_ie && tim_ie[1] >= 2;
5081
5082 if (valid)
5083 tim = (void *)(tim_ie + 2);
5084
5085 if (dtim_count)
5086 *dtim_count = valid ? tim->dtim_count : 0;
5087
5088 if (dtim_period)
5089 *dtim_period = valid ? tim->dtim_period : 0;
5090
5091 /* Check if value is overridden by non-transmitted profile */
5092 if (!idx_ie || idx_ie[1] < 3)
5093 return valid;
5094
5095 idx = (void *)(idx_ie + 2);
5096
5097 if (dtim_count)
5098 *dtim_count = idx->dtim_count;
5099
5100 if (dtim_period)
5101 *dtim_period = idx->dtim_period;
5102
5103 return true;
5104 }
5105
ieee80211_assoc_success(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,struct ieee802_11_elems * elems,const u8 * elem_start,unsigned int elem_len)5106 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
5107 struct ieee80211_mgmt *mgmt,
5108 struct ieee802_11_elems *elems,
5109 const u8 *elem_start, unsigned int elem_len)
5110 {
5111 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5112 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5113 struct ieee80211_local *local = sdata->local;
5114 unsigned int link_id;
5115 struct sta_info *sta;
5116 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
5117 u16 valid_links = 0, dormant_links = 0;
5118 int err;
5119
5120 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5121 /*
5122 * station info was already allocated and inserted before
5123 * the association and should be available to us
5124 */
5125 sta = sta_info_get(sdata, assoc_data->ap_addr);
5126 if (WARN_ON(!sta))
5127 goto out_err;
5128
5129 if (ieee80211_vif_is_mld(&sdata->vif)) {
5130 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5131 if (!assoc_data->link[link_id].bss)
5132 continue;
5133
5134 valid_links |= BIT(link_id);
5135 if (assoc_data->link[link_id].disabled)
5136 dormant_links |= BIT(link_id);
5137
5138 if (link_id != assoc_data->assoc_link_id) {
5139 err = ieee80211_sta_allocate_link(sta, link_id);
5140 if (err)
5141 goto out_err;
5142 }
5143 }
5144
5145 ieee80211_vif_set_links(sdata, valid_links, dormant_links);
5146 }
5147
5148 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5149 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
5150 struct ieee80211_link_data *link;
5151 struct link_sta_info *link_sta;
5152
5153 if (!cbss)
5154 continue;
5155
5156 link = sdata_dereference(sdata->link[link_id], sdata);
5157 if (WARN_ON(!link))
5158 goto out_err;
5159
5160 if (ieee80211_vif_is_mld(&sdata->vif))
5161 link_info(link,
5162 "local address %pM, AP link address %pM%s\n",
5163 link->conf->addr,
5164 assoc_data->link[link_id].bss->bssid,
5165 link_id == assoc_data->assoc_link_id ?
5166 " (assoc)" : "");
5167
5168 link_sta = rcu_dereference_protected(sta->link[link_id],
5169 lockdep_is_held(&local->hw.wiphy->mtx));
5170 if (WARN_ON(!link_sta))
5171 goto out_err;
5172
5173 if (!link->u.mgd.have_beacon) {
5174 const struct cfg80211_bss_ies *ies;
5175
5176 rcu_read_lock();
5177 ies = rcu_dereference(cbss->beacon_ies);
5178 if (ies)
5179 link->u.mgd.have_beacon = true;
5180 else
5181 ies = rcu_dereference(cbss->ies);
5182 ieee80211_get_dtim(ies,
5183 &link->conf->sync_dtim_count,
5184 &link->u.mgd.dtim_period);
5185 link->conf->beacon_int = cbss->beacon_interval;
5186 rcu_read_unlock();
5187 }
5188
5189 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
5190
5191 if (link_id != assoc_data->assoc_link_id) {
5192 err = ieee80211_prep_channel(sdata, link, cbss, true,
5193 &link->u.mgd.conn_flags);
5194 if (err) {
5195 link_info(link, "prep_channel failed\n");
5196 goto out_err;
5197 }
5198 }
5199
5200 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
5201 assoc_data->link[link_id].bss);
5202 if (err)
5203 goto out_err;
5204
5205 if (!ieee80211_assoc_config_link(link, link_sta,
5206 assoc_data->link[link_id].bss,
5207 mgmt, elem_start, elem_len,
5208 &changed[link_id]))
5209 goto out_err;
5210
5211 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
5212 valid_links &= ~BIT(link_id);
5213 ieee80211_sta_remove_link(sta, link_id);
5214 continue;
5215 }
5216
5217 if (link_id != assoc_data->assoc_link_id) {
5218 err = ieee80211_sta_activate_link(sta, link_id);
5219 if (err)
5220 goto out_err;
5221 }
5222 }
5223
5224 /* links might have changed due to rejected ones, set them again */
5225 ieee80211_vif_set_links(sdata, valid_links, dormant_links);
5226
5227 rate_control_rate_init(sta);
5228
5229 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
5230 set_sta_flag(sta, WLAN_STA_MFP);
5231 sta->sta.mfp = true;
5232 } else {
5233 sta->sta.mfp = false;
5234 }
5235
5236 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
5237 elems->ext_capab_len);
5238
5239 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
5240 local->hw.queues >= IEEE80211_NUM_ACS;
5241
5242 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
5243 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
5244 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
5245 if (err) {
5246 sdata_info(sdata,
5247 "failed to move station %pM to desired state\n",
5248 sta->sta.addr);
5249 WARN_ON(__sta_info_destroy(sta));
5250 goto out_err;
5251 }
5252
5253 if (sdata->wdev.use_4addr)
5254 drv_sta_set_4addr(local, sdata, &sta->sta, true);
5255
5256 ieee80211_set_associated(sdata, assoc_data, changed);
5257
5258 /*
5259 * If we're using 4-addr mode, let the AP know that we're
5260 * doing so, so that it can create the STA VLAN on its side
5261 */
5262 if (ifmgd->use_4addr)
5263 ieee80211_send_4addr_nullfunc(local, sdata);
5264
5265 /*
5266 * Start timer to probe the connection to the AP now.
5267 * Also start the timer that will detect beacon loss.
5268 */
5269 ieee80211_sta_reset_beacon_monitor(sdata);
5270 ieee80211_sta_reset_conn_monitor(sdata);
5271
5272 return true;
5273 out_err:
5274 eth_zero_addr(sdata->vif.cfg.ap_addr);
5275 return false;
5276 }
5277
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)5278 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5279 struct ieee80211_mgmt *mgmt,
5280 size_t len)
5281 {
5282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5283 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5284 u16 capab_info, status_code, aid;
5285 struct ieee80211_elems_parse_params parse_params = {
5286 .bss = NULL,
5287 .link_id = -1,
5288 .from_ap = true,
5289 };
5290 struct ieee802_11_elems *elems;
5291 int ac;
5292 const u8 *elem_start;
5293 unsigned int elem_len;
5294 bool reassoc;
5295 struct ieee80211_event event = {
5296 .type = MLME_EVENT,
5297 .u.mlme.data = ASSOC_EVENT,
5298 };
5299 struct ieee80211_prep_tx_info info = {};
5300 struct cfg80211_rx_assoc_resp_data resp = {
5301 .uapsd_queues = -1,
5302 };
5303 u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5304 unsigned int link_id;
5305
5306 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5307
5308 if (!assoc_data)
5309 return;
5310
5311 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5312 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5313 return;
5314
5315 /*
5316 * AssocResp and ReassocResp have identical structure, so process both
5317 * of them in this function.
5318 */
5319
5320 if (len < 24 + 6)
5321 return;
5322
5323 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5324 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5325 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5326 if (assoc_data->s1g)
5327 elem_start = mgmt->u.s1g_assoc_resp.variable;
5328 else
5329 elem_start = mgmt->u.assoc_resp.variable;
5330
5331 /*
5332 * Note: this may not be perfect, AP might misbehave - if
5333 * anyone needs to rely on perfect complete notification
5334 * with the exact right subtype, then we need to track what
5335 * we actually transmitted.
5336 */
5337 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5338 IEEE80211_STYPE_ASSOC_REQ;
5339
5340 if (assoc_data->fils_kek_len &&
5341 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5342 return;
5343
5344 elem_len = len - (elem_start - (u8 *)mgmt);
5345 parse_params.start = elem_start;
5346 parse_params.len = elem_len;
5347 elems = ieee802_11_parse_elems_full(&parse_params);
5348 if (!elems)
5349 goto notify_driver;
5350
5351 if (elems->aid_resp)
5352 aid = le16_to_cpu(elems->aid_resp->aid);
5353 else if (assoc_data->s1g)
5354 aid = 0; /* TODO */
5355 else
5356 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5357
5358 /*
5359 * The 5 MSB of the AID field are reserved
5360 * (802.11-2016 9.4.1.8 AID field)
5361 */
5362 aid &= 0x7ff;
5363
5364 sdata_info(sdata,
5365 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5366 reassoc ? "Rea" : "A", assoc_data->ap_addr,
5367 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5368
5369 ifmgd->broken_ap = false;
5370
5371 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5372 elems->timeout_int &&
5373 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5374 u32 tu, ms;
5375
5376 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5377 le32_to_cpu(elems->timeout_int->value));
5378
5379 tu = le32_to_cpu(elems->timeout_int->value);
5380 ms = tu * 1024 / 1000;
5381 sdata_info(sdata,
5382 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5383 assoc_data->ap_addr, tu, ms);
5384 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5385 assoc_data->timeout_started = true;
5386 assoc_data->comeback = true;
5387 if (ms > IEEE80211_ASSOC_TIMEOUT)
5388 run_again(sdata, assoc_data->timeout);
5389 goto notify_driver;
5390 }
5391
5392 if (status_code != WLAN_STATUS_SUCCESS) {
5393 sdata_info(sdata, "%pM denied association (code=%d)\n",
5394 assoc_data->ap_addr, status_code);
5395 event.u.mlme.status = MLME_DENIED;
5396 event.u.mlme.reason = status_code;
5397 drv_event_callback(sdata->local, sdata, &event);
5398 } else {
5399 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5400 sdata_info(sdata,
5401 "invalid AID value %d (out of range), turn off PS\n",
5402 aid);
5403 aid = 0;
5404 ifmgd->broken_ap = true;
5405 }
5406
5407 if (ieee80211_vif_is_mld(&sdata->vif)) {
5408 struct ieee80211_mle_basic_common_info *common;
5409
5410 if (!elems->ml_basic) {
5411 sdata_info(sdata,
5412 "MLO association with %pM but no (basic) multi-link element in response!\n",
5413 assoc_data->ap_addr);
5414 goto abandon_assoc;
5415 }
5416
5417 common = (void *)elems->ml_basic->variable;
5418
5419 if (memcmp(assoc_data->ap_addr,
5420 common->mld_mac_addr, ETH_ALEN)) {
5421 sdata_info(sdata,
5422 "AP MLD MAC address mismatch: got %pM expected %pM\n",
5423 common->mld_mac_addr,
5424 assoc_data->ap_addr);
5425 goto abandon_assoc;
5426 }
5427 }
5428
5429 sdata->vif.cfg.aid = aid;
5430
5431 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5432 elem_start, elem_len)) {
5433 /* oops -- internal error -- send timeout for now */
5434 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5435 goto notify_driver;
5436 }
5437 event.u.mlme.status = MLME_SUCCESS;
5438 drv_event_callback(sdata->local, sdata, &event);
5439 sdata_info(sdata, "associated\n");
5440
5441 info.success = 1;
5442 }
5443
5444 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5445 struct ieee80211_link_data *link;
5446
5447 if (!assoc_data->link[link_id].bss)
5448 continue;
5449
5450 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5451 ether_addr_copy(resp.links[link_id].addr,
5452 assoc_data->link[link_id].addr);
5453 resp.links[link_id].status = assoc_data->link[link_id].status;
5454
5455 link = sdata_dereference(sdata->link[link_id], sdata);
5456 if (!link)
5457 continue;
5458
5459 /* get uapsd queues configuration - same for all links */
5460 resp.uapsd_queues = 0;
5461 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5462 if (link->tx_conf[ac].uapsd)
5463 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5464 }
5465
5466 if (ieee80211_vif_is_mld(&sdata->vif)) {
5467 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5468 resp.ap_mld_addr = ap_mld_addr;
5469 }
5470
5471 ieee80211_destroy_assoc_data(sdata,
5472 status_code == WLAN_STATUS_SUCCESS ?
5473 ASSOC_SUCCESS :
5474 ASSOC_REJECTED);
5475
5476 resp.buf = (u8 *)mgmt;
5477 resp.len = len;
5478 resp.req_ies = ifmgd->assoc_req_ies;
5479 resp.req_ies_len = ifmgd->assoc_req_ies_len;
5480 cfg80211_rx_assoc_resp(sdata->dev, &resp);
5481 notify_driver:
5482 drv_mgd_complete_tx(sdata->local, sdata, &info);
5483 kfree(elems);
5484 return;
5485 abandon_assoc:
5486 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5487 goto notify_driver;
5488 }
5489
ieee80211_rx_bss_info(struct ieee80211_link_data * link,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)5490 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5491 struct ieee80211_mgmt *mgmt, size_t len,
5492 struct ieee80211_rx_status *rx_status)
5493 {
5494 struct ieee80211_sub_if_data *sdata = link->sdata;
5495 struct ieee80211_local *local = sdata->local;
5496 struct ieee80211_bss *bss;
5497 struct ieee80211_channel *channel;
5498
5499 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5500
5501 channel = ieee80211_get_channel_khz(local->hw.wiphy,
5502 ieee80211_rx_status_to_khz(rx_status));
5503 if (!channel)
5504 return;
5505
5506 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5507 if (bss) {
5508 link->conf->beacon_rate = bss->beacon_rate;
5509 ieee80211_rx_bss_put(local, bss);
5510 }
5511 }
5512
5513
ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data * link,struct sk_buff * skb)5514 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5515 struct sk_buff *skb)
5516 {
5517 struct ieee80211_sub_if_data *sdata = link->sdata;
5518 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5519 struct ieee80211_if_managed *ifmgd;
5520 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5521 struct ieee80211_channel *channel;
5522 size_t baselen, len = skb->len;
5523
5524 ifmgd = &sdata->u.mgd;
5525
5526 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5527
5528 /*
5529 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5530 * "If a 6 GHz AP receives a Probe Request frame and responds with
5531 * a Probe Response frame [..], the Address 1 field of the Probe
5532 * Response frame shall be set to the broadcast address [..]"
5533 * So, on 6GHz band we should also accept broadcast responses.
5534 */
5535 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5536 rx_status->freq);
5537 if (!channel)
5538 return;
5539
5540 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5541 (channel->band != NL80211_BAND_6GHZ ||
5542 !is_broadcast_ether_addr(mgmt->da)))
5543 return; /* ignore ProbeResp to foreign address */
5544
5545 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5546 if (baselen > len)
5547 return;
5548
5549 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5550
5551 if (ifmgd->associated &&
5552 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
5553 ieee80211_reset_ap_probe(sdata);
5554 }
5555
5556 /*
5557 * This is the canonical list of information elements we care about,
5558 * the filter code also gives us all changes to the Microsoft OUI
5559 * (00:50:F2) vendor IE which is used for WMM which we need to track,
5560 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
5561 * changes to requested client power.
5562 *
5563 * We implement beacon filtering in software since that means we can
5564 * avoid processing the frame here and in cfg80211, and userspace
5565 * will not be able to tell whether the hardware supports it or not.
5566 *
5567 * XXX: This list needs to be dynamic -- userspace needs to be able to
5568 * add items it requires. It also needs to be able to tell us to
5569 * look out for other vendor IEs.
5570 */
5571 static const u64 care_about_ies =
5572 (1ULL << WLAN_EID_COUNTRY) |
5573 (1ULL << WLAN_EID_ERP_INFO) |
5574 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
5575 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
5576 (1ULL << WLAN_EID_HT_CAPABILITY) |
5577 (1ULL << WLAN_EID_HT_OPERATION) |
5578 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
5579
ieee80211_handle_beacon_sig(struct ieee80211_link_data * link,struct ieee80211_if_managed * ifmgd,struct ieee80211_bss_conf * bss_conf,struct ieee80211_local * local,struct ieee80211_rx_status * rx_status)5580 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
5581 struct ieee80211_if_managed *ifmgd,
5582 struct ieee80211_bss_conf *bss_conf,
5583 struct ieee80211_local *local,
5584 struct ieee80211_rx_status *rx_status)
5585 {
5586 struct ieee80211_sub_if_data *sdata = link->sdata;
5587
5588 /* Track average RSSI from the Beacon frames of the current AP */
5589
5590 if (!link->u.mgd.tracking_signal_avg) {
5591 link->u.mgd.tracking_signal_avg = true;
5592 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
5593 link->u.mgd.last_cqm_event_signal = 0;
5594 link->u.mgd.count_beacon_signal = 1;
5595 link->u.mgd.last_ave_beacon_signal = 0;
5596 } else {
5597 link->u.mgd.count_beacon_signal++;
5598 }
5599
5600 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
5601 -rx_status->signal);
5602
5603 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
5604 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5605 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5606 int last_sig = link->u.mgd.last_ave_beacon_signal;
5607 struct ieee80211_event event = {
5608 .type = RSSI_EVENT,
5609 };
5610
5611 /*
5612 * if signal crosses either of the boundaries, invoke callback
5613 * with appropriate parameters
5614 */
5615 if (sig > ifmgd->rssi_max_thold &&
5616 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
5617 link->u.mgd.last_ave_beacon_signal = sig;
5618 event.u.rssi.data = RSSI_EVENT_HIGH;
5619 drv_event_callback(local, sdata, &event);
5620 } else if (sig < ifmgd->rssi_min_thold &&
5621 (last_sig >= ifmgd->rssi_max_thold ||
5622 last_sig == 0)) {
5623 link->u.mgd.last_ave_beacon_signal = sig;
5624 event.u.rssi.data = RSSI_EVENT_LOW;
5625 drv_event_callback(local, sdata, &event);
5626 }
5627 }
5628
5629 if (bss_conf->cqm_rssi_thold &&
5630 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
5631 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
5632 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5633 int last_event = link->u.mgd.last_cqm_event_signal;
5634 int thold = bss_conf->cqm_rssi_thold;
5635 int hyst = bss_conf->cqm_rssi_hyst;
5636
5637 if (sig < thold &&
5638 (last_event == 0 || sig < last_event - hyst)) {
5639 link->u.mgd.last_cqm_event_signal = sig;
5640 ieee80211_cqm_rssi_notify(
5641 &sdata->vif,
5642 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5643 sig, GFP_KERNEL);
5644 } else if (sig > thold &&
5645 (last_event == 0 || sig > last_event + hyst)) {
5646 link->u.mgd.last_cqm_event_signal = sig;
5647 ieee80211_cqm_rssi_notify(
5648 &sdata->vif,
5649 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5650 sig, GFP_KERNEL);
5651 }
5652 }
5653
5654 if (bss_conf->cqm_rssi_low &&
5655 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5656 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5657 int last_event = link->u.mgd.last_cqm_event_signal;
5658 int low = bss_conf->cqm_rssi_low;
5659 int high = bss_conf->cqm_rssi_high;
5660
5661 if (sig < low &&
5662 (last_event == 0 || last_event >= low)) {
5663 link->u.mgd.last_cqm_event_signal = sig;
5664 ieee80211_cqm_rssi_notify(
5665 &sdata->vif,
5666 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5667 sig, GFP_KERNEL);
5668 } else if (sig > high &&
5669 (last_event == 0 || last_event <= high)) {
5670 link->u.mgd.last_cqm_event_signal = sig;
5671 ieee80211_cqm_rssi_notify(
5672 &sdata->vif,
5673 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5674 sig, GFP_KERNEL);
5675 }
5676 }
5677 }
5678
ieee80211_rx_our_beacon(const u8 * tx_bssid,struct cfg80211_bss * bss)5679 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
5680 struct cfg80211_bss *bss)
5681 {
5682 if (ether_addr_equal(tx_bssid, bss->bssid))
5683 return true;
5684 if (!bss->transmitted_bss)
5685 return false;
5686 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
5687 }
5688
ieee80211_config_puncturing(struct ieee80211_link_data * link,const struct ieee80211_eht_operation * eht_oper,u64 * changed)5689 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link,
5690 const struct ieee80211_eht_operation *eht_oper,
5691 u64 *changed)
5692 {
5693 struct ieee80211_local *local = link->sdata->local;
5694 u16 bitmap = 0, extracted;
5695
5696 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) &&
5697 (eht_oper->params &
5698 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) {
5699 const struct ieee80211_eht_operation_info *info =
5700 (void *)eht_oper->optional;
5701 const u8 *disable_subchannel_bitmap = info->optional;
5702
5703 bitmap = get_unaligned_le16(disable_subchannel_bitmap);
5704 }
5705
5706 extracted = ieee80211_extract_dis_subch_bmap(eht_oper,
5707 &link->conf->chandef,
5708 bitmap);
5709
5710 /* accept if there are no changes */
5711 if (!(*changed & BSS_CHANGED_BANDWIDTH) &&
5712 extracted == link->conf->eht_puncturing)
5713 return true;
5714
5715 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap,
5716 &link->conf->chandef)) {
5717 link_info(link,
5718 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n",
5719 link->u.mgd.bssid,
5720 bitmap,
5721 link->conf->chandef.width);
5722 return false;
5723 }
5724
5725 if (bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING))
5726 return false;
5727
5728 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed);
5729 return true;
5730 }
5731
ieee80211_ml_reconf_work(struct wiphy * wiphy,struct wiphy_work * work)5732 static void ieee80211_ml_reconf_work(struct wiphy *wiphy,
5733 struct wiphy_work *work)
5734 {
5735 struct ieee80211_sub_if_data *sdata =
5736 container_of(work, struct ieee80211_sub_if_data,
5737 u.mgd.ml_reconf_work.work);
5738 u16 new_valid_links, new_active_links, new_dormant_links;
5739 int ret;
5740
5741 if (!sdata->u.mgd.removed_links)
5742 return;
5743
5744 sdata_info(sdata,
5745 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n",
5746 sdata->vif.valid_links, sdata->u.mgd.removed_links);
5747
5748 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links;
5749 if (new_valid_links == sdata->vif.valid_links)
5750 return;
5751
5752 if (!new_valid_links ||
5753 !(new_valid_links & ~sdata->vif.dormant_links)) {
5754 sdata_info(sdata, "No valid links after reconfiguration\n");
5755 ret = -EINVAL;
5756 goto out;
5757 }
5758
5759 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links;
5760 if (new_active_links != sdata->vif.active_links) {
5761 if (!new_active_links)
5762 new_active_links =
5763 BIT(ffs(new_valid_links &
5764 ~sdata->vif.dormant_links) - 1);
5765
5766 ret = ieee80211_set_active_links(&sdata->vif, new_active_links);
5767 if (ret) {
5768 sdata_info(sdata,
5769 "Failed setting active links\n");
5770 goto out;
5771 }
5772 }
5773
5774 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links;
5775
5776 ret = ieee80211_vif_set_links(sdata, new_valid_links,
5777 new_dormant_links);
5778 if (ret)
5779 sdata_info(sdata, "Failed setting valid links\n");
5780
5781 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS);
5782
5783 out:
5784 if (!ret)
5785 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links);
5786 else
5787 __ieee80211_disconnect(sdata);
5788
5789 sdata->u.mgd.removed_links = 0;
5790 }
5791
ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems)5792 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
5793 struct ieee802_11_elems *elems)
5794 {
5795 const struct ieee80211_multi_link_elem *ml;
5796 const struct element *sub;
5797 ssize_t ml_len;
5798 unsigned long removed_links = 0;
5799 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {};
5800 u8 link_id;
5801 u32 delay;
5802
5803 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf)
5804 return;
5805
5806 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem,
5807 elems->ie_start,
5808 elems->total_len,
5809 elems->scratch_pos,
5810 elems->scratch + elems->scratch_len -
5811 elems->scratch_pos,
5812 WLAN_EID_FRAGMENT);
5813 if (ml_len < 0)
5814 return;
5815
5816 elems->ml_reconf = (const void *)elems->scratch_pos;
5817 elems->ml_reconf_len = ml_len;
5818 ml = elems->ml_reconf;
5819
5820 /* Directly parse the sub elements as the common information doesn't
5821 * hold any useful information.
5822 */
5823 for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
5824 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
5825 u8 *pos = prof->variable;
5826 u16 control;
5827
5828 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
5829 continue;
5830
5831 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data,
5832 sub->datalen))
5833 return;
5834
5835 control = le16_to_cpu(prof->control);
5836 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID;
5837
5838 removed_links |= BIT(link_id);
5839
5840 /* the MAC address should not be included, but handle it */
5841 if (control &
5842 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT)
5843 pos += 6;
5844
5845 /* According to Draft P802.11be_D3.0, the control should
5846 * include the AP Removal Timer present. If the AP Removal Timer
5847 * is not present assume immediate removal.
5848 */
5849 if (control &
5850 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT)
5851 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos);
5852 }
5853
5854 removed_links &= sdata->vif.valid_links;
5855 if (!removed_links) {
5856 /* In case the removal was cancelled, abort it */
5857 if (sdata->u.mgd.removed_links) {
5858 sdata->u.mgd.removed_links = 0;
5859 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
5860 &sdata->u.mgd.ml_reconf_work);
5861 }
5862 return;
5863 }
5864
5865 delay = 0;
5866 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) {
5867 struct ieee80211_bss_conf *link_conf =
5868 sdata_dereference(sdata->vif.link_conf[link_id], sdata);
5869 u32 link_delay;
5870
5871 if (!link_conf) {
5872 removed_links &= ~BIT(link_id);
5873 continue;
5874 }
5875
5876 link_delay = link_conf->beacon_int *
5877 link_removal_timeout[link_id];
5878
5879 if (!delay)
5880 delay = link_delay;
5881 else
5882 delay = min(delay, link_delay);
5883 }
5884
5885 sdata->u.mgd.removed_links = removed_links;
5886 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
5887 &sdata->u.mgd.ml_reconf_work,
5888 TU_TO_JIFFIES(delay));
5889 }
5890
ieee80211_tid_to_link_map_work(struct wiphy * wiphy,struct wiphy_work * work)5891 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy,
5892 struct wiphy_work *work)
5893 {
5894 u16 new_active_links, new_dormant_links;
5895 struct ieee80211_sub_if_data *sdata =
5896 container_of(work, struct ieee80211_sub_if_data,
5897 u.mgd.ttlm_work.work);
5898 int ret;
5899
5900 new_active_links = sdata->u.mgd.ttlm_info.map &
5901 sdata->vif.valid_links;
5902 new_dormant_links = ~sdata->u.mgd.ttlm_info.map &
5903 sdata->vif.valid_links;
5904 if (!new_active_links) {
5905 ieee80211_disconnect(&sdata->vif, false);
5906 return;
5907 }
5908
5909 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0);
5910 new_active_links = BIT(ffs(new_active_links) - 1);
5911 ieee80211_set_active_links(&sdata->vif, new_active_links);
5912
5913 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links,
5914 new_dormant_links);
5915
5916 sdata->u.mgd.ttlm_info.active = true;
5917 sdata->u.mgd.ttlm_info.switch_time = 0;
5918
5919 if (!ret)
5920 ieee80211_vif_cfg_change_notify(sdata,
5921 BSS_CHANGED_MLD_VALID_LINKS);
5922 }
5923
ieee80211_get_ttlm(u8 bm_size,u8 * data)5924 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data)
5925 {
5926 if (bm_size == 1)
5927 return *data;
5928 else
5929 return get_unaligned_le16(data);
5930 }
5931
5932 static int
ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data * sdata,const struct ieee80211_ttlm_elem * ttlm,struct ieee80211_adv_ttlm_info * ttlm_info)5933 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata,
5934 const struct ieee80211_ttlm_elem *ttlm,
5935 struct ieee80211_adv_ttlm_info *ttlm_info)
5936 {
5937 /* The element size was already validated in
5938 * ieee80211_tid_to_link_map_size_ok()
5939 */
5940 u8 control, link_map_presence, map_size, tid;
5941 u8 *pos;
5942
5943 memset(ttlm_info, 0, sizeof(*ttlm_info));
5944 pos = (void *)ttlm->optional;
5945 control = ttlm->control;
5946
5947 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) ||
5948 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT))
5949 return 0;
5950
5951 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) !=
5952 IEEE80211_TTLM_DIRECTION_BOTH) {
5953 sdata_info(sdata, "Invalid advertised T2L map direction\n");
5954 return -EINVAL;
5955 }
5956
5957 link_map_presence = *pos;
5958 pos++;
5959
5960 ttlm_info->switch_time = get_unaligned_le16(pos);
5961
5962 /* Since ttlm_info->switch_time == 0 means no switch time, bump it
5963 * by 1.
5964 */
5965 if (!ttlm_info->switch_time)
5966 ttlm_info->switch_time = 1;
5967
5968 pos += 2;
5969
5970 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) {
5971 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16;
5972 pos += 3;
5973 }
5974
5975 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
5976 map_size = 1;
5977 else
5978 map_size = 2;
5979
5980 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall
5981 * not advertise a TID-to-link mapping that does not map all TIDs to the
5982 * same link set, reject frame if not all links have mapping
5983 */
5984 if (link_map_presence != 0xff) {
5985 sdata_info(sdata,
5986 "Invalid advertised T2L mapping presence indicator\n");
5987 return -EINVAL;
5988 }
5989
5990 ttlm_info->map = ieee80211_get_ttlm(map_size, pos);
5991 if (!ttlm_info->map) {
5992 sdata_info(sdata,
5993 "Invalid advertised T2L map for TID 0\n");
5994 return -EINVAL;
5995 }
5996
5997 pos += map_size;
5998
5999 for (tid = 1; tid < 8; tid++) {
6000 u16 map = ieee80211_get_ttlm(map_size, pos);
6001
6002 if (map != ttlm_info->map) {
6003 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n",
6004 tid);
6005 return -EINVAL;
6006 }
6007
6008 pos += map_size;
6009 }
6010 return 0;
6011 }
6012
ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,u64 beacon_ts)6013 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata,
6014 struct ieee802_11_elems *elems,
6015 u64 beacon_ts)
6016 {
6017 u8 i;
6018 int ret;
6019
6020 if (!ieee80211_vif_is_mld(&sdata->vif))
6021 return;
6022
6023 if (!elems->ttlm_num) {
6024 if (sdata->u.mgd.ttlm_info.switch_time) {
6025 /* if a planned TID-to-link mapping was cancelled -
6026 * abort it
6027 */
6028 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
6029 &sdata->u.mgd.ttlm_work);
6030 } else if (sdata->u.mgd.ttlm_info.active) {
6031 /* if no TID-to-link element, set to default mapping in
6032 * which all TIDs are mapped to all setup links
6033 */
6034 ret = ieee80211_vif_set_links(sdata,
6035 sdata->vif.valid_links,
6036 0);
6037 if (ret) {
6038 sdata_info(sdata, "Failed setting valid/dormant links\n");
6039 return;
6040 }
6041 ieee80211_vif_cfg_change_notify(sdata,
6042 BSS_CHANGED_MLD_VALID_LINKS);
6043 }
6044 memset(&sdata->u.mgd.ttlm_info, 0,
6045 sizeof(sdata->u.mgd.ttlm_info));
6046 return;
6047 }
6048
6049 for (i = 0; i < elems->ttlm_num; i++) {
6050 struct ieee80211_adv_ttlm_info ttlm_info;
6051 u32 res;
6052
6053 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i],
6054 &ttlm_info);
6055
6056 if (res) {
6057 __ieee80211_disconnect(sdata);
6058 return;
6059 }
6060
6061 if (ttlm_info.switch_time) {
6062 u16 beacon_ts_tu, st_tu, delay;
6063 u32 delay_jiffies;
6064 u64 mask;
6065
6066 /* The t2l map switch time is indicated with a partial
6067 * TSF value (bits 10 to 25), get the partial beacon TS
6068 * as well, and calc the delay to the start time.
6069 */
6070 mask = GENMASK_ULL(25, 10);
6071 beacon_ts_tu = (beacon_ts & mask) >> 10;
6072 st_tu = ttlm_info.switch_time;
6073 delay = st_tu - beacon_ts_tu;
6074
6075 /*
6076 * If the switch time is far in the future, then it
6077 * could also be the previous switch still being
6078 * announced.
6079 * We can simply ignore it for now, if it is a future
6080 * switch the AP will continue to announce it anyway.
6081 */
6082 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW)
6083 return;
6084
6085 delay_jiffies = TU_TO_JIFFIES(delay);
6086
6087 /* Link switching can take time, so schedule it
6088 * 100ms before to be ready on time
6089 */
6090 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS)
6091 delay_jiffies -=
6092 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS;
6093 else
6094 delay_jiffies = 0;
6095
6096 sdata->u.mgd.ttlm_info = ttlm_info;
6097 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
6098 &sdata->u.mgd.ttlm_work);
6099 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
6100 &sdata->u.mgd.ttlm_work,
6101 delay_jiffies);
6102 return;
6103 }
6104 }
6105 }
6106
ieee80211_rx_mgmt_beacon(struct ieee80211_link_data * link,struct ieee80211_hdr * hdr,size_t len,struct ieee80211_rx_status * rx_status)6107 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
6108 struct ieee80211_hdr *hdr, size_t len,
6109 struct ieee80211_rx_status *rx_status)
6110 {
6111 struct ieee80211_sub_if_data *sdata = link->sdata;
6112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6113 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
6114 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6115 struct ieee80211_mgmt *mgmt = (void *) hdr;
6116 size_t baselen;
6117 struct ieee802_11_elems *elems;
6118 struct ieee80211_local *local = sdata->local;
6119 struct ieee80211_chanctx_conf *chanctx_conf;
6120 struct ieee80211_supported_band *sband;
6121 struct ieee80211_channel *chan;
6122 struct link_sta_info *link_sta;
6123 struct sta_info *sta;
6124 u64 changed = 0;
6125 bool erp_valid;
6126 u8 erp_value = 0;
6127 u32 ncrc = 0;
6128 u8 *bssid, *variable = mgmt->u.beacon.variable;
6129 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
6130 struct ieee80211_elems_parse_params parse_params = {
6131 .link_id = -1,
6132 .from_ap = true,
6133 };
6134
6135 lockdep_assert_wiphy(local->hw.wiphy);
6136
6137 /* Process beacon from the current BSS */
6138 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
6139 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
6140 struct ieee80211_ext *ext = (void *) mgmt;
6141
6142 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
6143 variable = ext->u.s1g_short_beacon.variable;
6144 else
6145 variable = ext->u.s1g_beacon.variable;
6146 }
6147
6148 baselen = (u8 *) variable - (u8 *) mgmt;
6149 if (baselen > len)
6150 return;
6151
6152 parse_params.start = variable;
6153 parse_params.len = len - baselen;
6154
6155 rcu_read_lock();
6156 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
6157 if (!chanctx_conf) {
6158 rcu_read_unlock();
6159 return;
6160 }
6161
6162 if (ieee80211_rx_status_to_khz(rx_status) !=
6163 ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
6164 rcu_read_unlock();
6165 return;
6166 }
6167 chan = chanctx_conf->def.chan;
6168 rcu_read_unlock();
6169
6170 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
6171 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) &&
6172 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
6173 parse_params.bss = ifmgd->assoc_data->link[0].bss;
6174 elems = ieee802_11_parse_elems_full(&parse_params);
6175 if (!elems)
6176 return;
6177
6178 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
6179
6180 if (elems->dtim_period)
6181 link->u.mgd.dtim_period = elems->dtim_period;
6182 link->u.mgd.have_beacon = true;
6183 ifmgd->assoc_data->need_beacon = false;
6184 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6185 link->conf->sync_tsf =
6186 le64_to_cpu(mgmt->u.beacon.timestamp);
6187 link->conf->sync_device_ts =
6188 rx_status->device_timestamp;
6189 link->conf->sync_dtim_count = elems->dtim_count;
6190 }
6191
6192 if (elems->mbssid_config_ie)
6193 bss_conf->profile_periodicity =
6194 elems->mbssid_config_ie->profile_periodicity;
6195 else
6196 bss_conf->profile_periodicity = 0;
6197
6198 if (elems->ext_capab_len >= 11 &&
6199 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6200 bss_conf->ema_ap = true;
6201 else
6202 bss_conf->ema_ap = false;
6203
6204 /* continue assoc process */
6205 ifmgd->assoc_data->timeout = jiffies;
6206 ifmgd->assoc_data->timeout_started = true;
6207 run_again(sdata, ifmgd->assoc_data->timeout);
6208 kfree(elems);
6209 return;
6210 }
6211
6212 if (!ifmgd->associated ||
6213 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
6214 return;
6215 bssid = link->u.mgd.bssid;
6216
6217 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
6218 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
6219 local, rx_status);
6220
6221 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
6222 mlme_dbg_ratelimited(sdata,
6223 "cancelling AP probe due to a received beacon\n");
6224 ieee80211_reset_ap_probe(sdata);
6225 }
6226
6227 /*
6228 * Push the beacon loss detection into the future since
6229 * we are processing a beacon from the AP just now.
6230 */
6231 ieee80211_sta_reset_beacon_monitor(sdata);
6232
6233 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
6234 * element (which carries the beacon interval). Don't forget to add a
6235 * bit to care_about_ies[] above if mac80211 is interested in a
6236 * changing S1G element.
6237 */
6238 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
6239 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
6240 parse_params.bss = link->u.mgd.bss;
6241 parse_params.filter = care_about_ies;
6242 parse_params.crc = ncrc;
6243 elems = ieee802_11_parse_elems_full(&parse_params);
6244 if (!elems)
6245 return;
6246 ncrc = elems->crc;
6247
6248 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
6249 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
6250 if (local->hw.conf.dynamic_ps_timeout > 0) {
6251 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
6252 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
6253 ieee80211_hw_config(local,
6254 IEEE80211_CONF_CHANGE_PS);
6255 }
6256 ieee80211_send_nullfunc(local, sdata, false);
6257 } else if (!local->pspolling && sdata->u.mgd.powersave) {
6258 local->pspolling = true;
6259
6260 /*
6261 * Here is assumed that the driver will be
6262 * able to send ps-poll frame and receive a
6263 * response even though power save mode is
6264 * enabled, but some drivers might require
6265 * to disable power save here. This needs
6266 * to be investigated.
6267 */
6268 ieee80211_send_pspoll(local, sdata);
6269 }
6270 }
6271
6272 if (sdata->vif.p2p ||
6273 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
6274 struct ieee80211_p2p_noa_attr noa = {};
6275 int ret;
6276
6277 ret = cfg80211_get_p2p_attr(variable,
6278 len - baselen,
6279 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
6280 (u8 *) &noa, sizeof(noa));
6281 if (ret >= 2) {
6282 if (link->u.mgd.p2p_noa_index != noa.index) {
6283 /* valid noa_attr and index changed */
6284 link->u.mgd.p2p_noa_index = noa.index;
6285 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
6286 changed |= BSS_CHANGED_P2P_PS;
6287 /*
6288 * make sure we update all information, the CRC
6289 * mechanism doesn't look at P2P attributes.
6290 */
6291 link->u.mgd.beacon_crc_valid = false;
6292 }
6293 } else if (link->u.mgd.p2p_noa_index != -1) {
6294 /* noa_attr not found and we had valid noa_attr before */
6295 link->u.mgd.p2p_noa_index = -1;
6296 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
6297 changed |= BSS_CHANGED_P2P_PS;
6298 link->u.mgd.beacon_crc_valid = false;
6299 }
6300 }
6301
6302 if (link->u.mgd.csa_waiting_bcn)
6303 ieee80211_chswitch_post_beacon(link);
6304
6305 /*
6306 * Update beacon timing and dtim count on every beacon appearance. This
6307 * will allow the driver to use the most updated values. Do it before
6308 * comparing this one with last received beacon.
6309 * IMPORTANT: These parameters would possibly be out of sync by the time
6310 * the driver will use them. The synchronized view is currently
6311 * guaranteed only in certain callbacks.
6312 */
6313 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
6314 !ieee80211_is_s1g_beacon(hdr->frame_control)) {
6315 link->conf->sync_tsf =
6316 le64_to_cpu(mgmt->u.beacon.timestamp);
6317 link->conf->sync_device_ts =
6318 rx_status->device_timestamp;
6319 link->conf->sync_dtim_count = elems->dtim_count;
6320 }
6321
6322 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
6323 ieee80211_is_s1g_short_beacon(mgmt->frame_control))
6324 goto free;
6325 link->u.mgd.beacon_crc = ncrc;
6326 link->u.mgd.beacon_crc_valid = true;
6327
6328 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
6329
6330 ieee80211_sta_process_chanswitch(link, rx_status->mactime,
6331 rx_status->device_timestamp,
6332 elems, true);
6333
6334 if (!link->u.mgd.disable_wmm_tracking &&
6335 ieee80211_sta_wmm_params(local, link, elems->wmm_param,
6336 elems->wmm_param_len,
6337 elems->mu_edca_param_set))
6338 changed |= BSS_CHANGED_QOS;
6339
6340 /*
6341 * If we haven't had a beacon before, tell the driver about the
6342 * DTIM period (and beacon timing if desired) now.
6343 */
6344 if (!link->u.mgd.have_beacon) {
6345 /* a few bogus AP send dtim_period = 0 or no TIM IE */
6346 bss_conf->dtim_period = elems->dtim_period ?: 1;
6347
6348 changed |= BSS_CHANGED_BEACON_INFO;
6349 link->u.mgd.have_beacon = true;
6350
6351 ieee80211_recalc_ps(local);
6352
6353 ieee80211_recalc_ps_vif(sdata);
6354 }
6355
6356 if (elems->erp_info) {
6357 erp_valid = true;
6358 erp_value = elems->erp_info[0];
6359 } else {
6360 erp_valid = false;
6361 }
6362
6363 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
6364 changed |= ieee80211_handle_bss_capability(link,
6365 le16_to_cpu(mgmt->u.beacon.capab_info),
6366 erp_valid, erp_value);
6367
6368 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6369 if (WARN_ON(!sta)) {
6370 goto free;
6371 }
6372 link_sta = rcu_dereference_protected(sta->link[link->link_id],
6373 lockdep_is_held(&local->hw.wiphy->mtx));
6374 if (WARN_ON(!link_sta)) {
6375 goto free;
6376 }
6377
6378 if (WARN_ON(!link->conf->chandef.chan))
6379 goto free;
6380
6381 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
6382
6383 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems);
6384
6385 if (ieee80211_config_bw(link, elems->ht_cap_elem,
6386 elems->vht_cap_elem, elems->ht_operation,
6387 elems->vht_operation, elems->he_operation,
6388 elems->eht_operation,
6389 elems->s1g_oper, bssid, &changed)) {
6390 sdata_info(sdata,
6391 "failed to follow AP %pM bandwidth change, disconnect\n",
6392 bssid);
6393 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6394 WLAN_REASON_DEAUTH_LEAVING,
6395 true, deauth_buf);
6396 ieee80211_report_disconnect(sdata, deauth_buf,
6397 sizeof(deauth_buf), true,
6398 WLAN_REASON_DEAUTH_LEAVING,
6399 false);
6400 goto free;
6401 }
6402
6403 if (elems->opmode_notif)
6404 ieee80211_vht_handle_opmode(sdata, link_sta,
6405 *elems->opmode_notif,
6406 rx_status->band);
6407
6408 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
6409 elems->country_elem,
6410 elems->country_elem_len,
6411 elems->pwr_constr_elem,
6412 elems->cisco_dtpc_elem);
6413
6414 if (elems->eht_operation &&
6415 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
6416 if (!ieee80211_config_puncturing(link, elems->eht_operation,
6417 &changed)) {
6418 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6419 WLAN_REASON_DEAUTH_LEAVING,
6420 true, deauth_buf);
6421 ieee80211_report_disconnect(sdata, deauth_buf,
6422 sizeof(deauth_buf), true,
6423 WLAN_REASON_DEAUTH_LEAVING,
6424 false);
6425 goto free;
6426 }
6427 }
6428
6429 ieee80211_ml_reconfiguration(sdata, elems);
6430 ieee80211_process_adv_ttlm(sdata, elems,
6431 le64_to_cpu(mgmt->u.beacon.timestamp));
6432
6433 ieee80211_link_info_change_notify(sdata, link, changed);
6434 free:
6435 kfree(elems);
6436 }
6437
ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)6438 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
6439 struct sk_buff *skb)
6440 {
6441 struct ieee80211_link_data *link = &sdata->deflink;
6442 struct ieee80211_rx_status *rx_status;
6443 struct ieee80211_hdr *hdr;
6444 u16 fc;
6445
6446 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6447
6448 rx_status = (struct ieee80211_rx_status *) skb->cb;
6449 hdr = (struct ieee80211_hdr *) skb->data;
6450 fc = le16_to_cpu(hdr->frame_control);
6451
6452 switch (fc & IEEE80211_FCTL_STYPE) {
6453 case IEEE80211_STYPE_S1G_BEACON:
6454 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
6455 break;
6456 }
6457 }
6458
ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)6459 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
6460 struct sk_buff *skb)
6461 {
6462 struct ieee80211_link_data *link = &sdata->deflink;
6463 struct ieee80211_rx_status *rx_status;
6464 struct ieee80211_mgmt *mgmt;
6465 u16 fc;
6466 int ies_len;
6467
6468 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6469
6470 rx_status = (struct ieee80211_rx_status *) skb->cb;
6471 mgmt = (struct ieee80211_mgmt *) skb->data;
6472 fc = le16_to_cpu(mgmt->frame_control);
6473
6474 if (rx_status->link_valid) {
6475 link = sdata_dereference(sdata->link[rx_status->link_id],
6476 sdata);
6477 if (!link)
6478 return;
6479 }
6480
6481 switch (fc & IEEE80211_FCTL_STYPE) {
6482 case IEEE80211_STYPE_BEACON:
6483 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
6484 skb->len, rx_status);
6485 break;
6486 case IEEE80211_STYPE_PROBE_RESP:
6487 ieee80211_rx_mgmt_probe_resp(link, skb);
6488 break;
6489 case IEEE80211_STYPE_AUTH:
6490 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
6491 break;
6492 case IEEE80211_STYPE_DEAUTH:
6493 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
6494 break;
6495 case IEEE80211_STYPE_DISASSOC:
6496 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
6497 break;
6498 case IEEE80211_STYPE_ASSOC_RESP:
6499 case IEEE80211_STYPE_REASSOC_RESP:
6500 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
6501 break;
6502 case IEEE80211_STYPE_ACTION:
6503 if (!sdata->u.mgd.associated ||
6504 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
6505 break;
6506
6507 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
6508 struct ieee802_11_elems *elems;
6509
6510 ies_len = skb->len -
6511 offsetof(struct ieee80211_mgmt,
6512 u.action.u.chan_switch.variable);
6513
6514 if (ies_len < 0)
6515 break;
6516
6517 /* CSA IE cannot be overridden, no need for BSSID */
6518 elems = ieee802_11_parse_elems(
6519 mgmt->u.action.u.chan_switch.variable,
6520 ies_len, true, NULL);
6521
6522 if (elems && !elems->parse_error)
6523 ieee80211_sta_process_chanswitch(link,
6524 rx_status->mactime,
6525 rx_status->device_timestamp,
6526 elems, false);
6527 kfree(elems);
6528 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
6529 struct ieee802_11_elems *elems;
6530
6531 ies_len = skb->len -
6532 offsetof(struct ieee80211_mgmt,
6533 u.action.u.ext_chan_switch.variable);
6534
6535 if (ies_len < 0)
6536 break;
6537
6538 /*
6539 * extended CSA IE can't be overridden, no need for
6540 * BSSID
6541 */
6542 elems = ieee802_11_parse_elems(
6543 mgmt->u.action.u.ext_chan_switch.variable,
6544 ies_len, true, NULL);
6545
6546 if (elems && !elems->parse_error) {
6547 /* for the handling code pretend it was an IE */
6548 elems->ext_chansw_ie =
6549 &mgmt->u.action.u.ext_chan_switch.data;
6550
6551 ieee80211_sta_process_chanswitch(link,
6552 rx_status->mactime,
6553 rx_status->device_timestamp,
6554 elems, false);
6555 }
6556
6557 kfree(elems);
6558 }
6559 break;
6560 }
6561 }
6562
ieee80211_sta_timer(struct timer_list * t)6563 static void ieee80211_sta_timer(struct timer_list *t)
6564 {
6565 struct ieee80211_sub_if_data *sdata =
6566 from_timer(sdata, t, u.mgd.timer);
6567
6568 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
6569 }
6570
ieee80211_sta_connection_lost(struct ieee80211_sub_if_data * sdata,u8 reason,bool tx)6571 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6572 u8 reason, bool tx)
6573 {
6574 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6575
6576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6577 tx, frame_buf);
6578
6579 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
6580 reason, false);
6581 }
6582
ieee80211_auth(struct ieee80211_sub_if_data * sdata)6583 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
6584 {
6585 struct ieee80211_local *local = sdata->local;
6586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6587 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
6588 u32 tx_flags = 0;
6589 u16 trans = 1;
6590 u16 status = 0;
6591 struct ieee80211_prep_tx_info info = {
6592 .subtype = IEEE80211_STYPE_AUTH,
6593 };
6594
6595 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6596
6597 if (WARN_ON_ONCE(!auth_data))
6598 return -EINVAL;
6599
6600 auth_data->tries++;
6601
6602 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
6603 sdata_info(sdata, "authentication with %pM timed out\n",
6604 auth_data->ap_addr);
6605
6606 /*
6607 * Most likely AP is not in the range so remove the
6608 * bss struct for that AP.
6609 */
6610 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
6611
6612 return -ETIMEDOUT;
6613 }
6614
6615 if (auth_data->algorithm == WLAN_AUTH_SAE)
6616 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
6617
6618 info.link_id = auth_data->link_id;
6619 drv_mgd_prepare_tx(local, sdata, &info);
6620
6621 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
6622 auth_data->ap_addr, auth_data->tries,
6623 IEEE80211_AUTH_MAX_TRIES);
6624
6625 auth_data->expected_transaction = 2;
6626
6627 if (auth_data->algorithm == WLAN_AUTH_SAE) {
6628 trans = auth_data->sae_trans;
6629 status = auth_data->sae_status;
6630 auth_data->expected_transaction = trans;
6631 }
6632
6633 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6634 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
6635 IEEE80211_TX_INTFL_MLME_CONN_TX;
6636
6637 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
6638 auth_data->data, auth_data->data_len,
6639 auth_data->ap_addr, auth_data->ap_addr,
6640 NULL, 0, 0, tx_flags);
6641
6642 if (tx_flags == 0) {
6643 if (auth_data->algorithm == WLAN_AUTH_SAE)
6644 auth_data->timeout = jiffies +
6645 IEEE80211_AUTH_TIMEOUT_SAE;
6646 else
6647 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
6648 } else {
6649 auth_data->timeout =
6650 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
6651 }
6652
6653 auth_data->timeout_started = true;
6654 run_again(sdata, auth_data->timeout);
6655
6656 return 0;
6657 }
6658
ieee80211_do_assoc(struct ieee80211_sub_if_data * sdata)6659 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
6660 {
6661 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
6662 struct ieee80211_local *local = sdata->local;
6663 int ret;
6664
6665 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6666
6667 assoc_data->tries++;
6668 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
6669 sdata_info(sdata, "association with %pM timed out\n",
6670 assoc_data->ap_addr);
6671
6672 /*
6673 * Most likely AP is not in the range so remove the
6674 * bss struct for that AP.
6675 */
6676 cfg80211_unlink_bss(local->hw.wiphy,
6677 assoc_data->link[assoc_data->assoc_link_id].bss);
6678
6679 return -ETIMEDOUT;
6680 }
6681
6682 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
6683 assoc_data->ap_addr, assoc_data->tries,
6684 IEEE80211_ASSOC_MAX_TRIES);
6685 ret = ieee80211_send_assoc(sdata);
6686 if (ret)
6687 return ret;
6688
6689 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6690 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
6691 assoc_data->timeout_started = true;
6692 run_again(sdata, assoc_data->timeout);
6693 } else {
6694 assoc_data->timeout =
6695 round_jiffies_up(jiffies +
6696 IEEE80211_ASSOC_TIMEOUT_LONG);
6697 assoc_data->timeout_started = true;
6698 run_again(sdata, assoc_data->timeout);
6699 }
6700
6701 return 0;
6702 }
6703
ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data * sdata,__le16 fc,bool acked)6704 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
6705 __le16 fc, bool acked)
6706 {
6707 struct ieee80211_local *local = sdata->local;
6708
6709 sdata->u.mgd.status_fc = fc;
6710 sdata->u.mgd.status_acked = acked;
6711 sdata->u.mgd.status_received = true;
6712
6713 wiphy_work_queue(local->hw.wiphy, &sdata->work);
6714 }
6715
ieee80211_sta_work(struct ieee80211_sub_if_data * sdata)6716 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
6717 {
6718 struct ieee80211_local *local = sdata->local;
6719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6720
6721 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6722
6723 if (ifmgd->status_received) {
6724 __le16 fc = ifmgd->status_fc;
6725 bool status_acked = ifmgd->status_acked;
6726
6727 ifmgd->status_received = false;
6728 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
6729 if (status_acked) {
6730 if (ifmgd->auth_data->algorithm ==
6731 WLAN_AUTH_SAE)
6732 ifmgd->auth_data->timeout =
6733 jiffies +
6734 IEEE80211_AUTH_TIMEOUT_SAE;
6735 else
6736 ifmgd->auth_data->timeout =
6737 jiffies +
6738 IEEE80211_AUTH_TIMEOUT_SHORT;
6739 run_again(sdata, ifmgd->auth_data->timeout);
6740 } else {
6741 ifmgd->auth_data->timeout = jiffies - 1;
6742 }
6743 ifmgd->auth_data->timeout_started = true;
6744 } else if (ifmgd->assoc_data &&
6745 !ifmgd->assoc_data->comeback &&
6746 (ieee80211_is_assoc_req(fc) ||
6747 ieee80211_is_reassoc_req(fc))) {
6748 /*
6749 * Update association timeout based on the TX status
6750 * for the (Re)Association Request frame. Skip this if
6751 * we have already processed a (Re)Association Response
6752 * frame that indicated need for association comeback
6753 * at a specific time in the future. This could happen
6754 * if the TX status information is delayed enough for
6755 * the response to be received and processed first.
6756 */
6757 if (status_acked) {
6758 ifmgd->assoc_data->timeout =
6759 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
6760 run_again(sdata, ifmgd->assoc_data->timeout);
6761 } else {
6762 ifmgd->assoc_data->timeout = jiffies - 1;
6763 }
6764 ifmgd->assoc_data->timeout_started = true;
6765 }
6766 }
6767
6768 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
6769 time_after(jiffies, ifmgd->auth_data->timeout)) {
6770 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
6771 /*
6772 * ok ... we waited for assoc or continuation but
6773 * userspace didn't do it, so kill the auth data
6774 */
6775 ieee80211_destroy_auth_data(sdata, false);
6776 } else if (ieee80211_auth(sdata)) {
6777 u8 ap_addr[ETH_ALEN];
6778 struct ieee80211_event event = {
6779 .type = MLME_EVENT,
6780 .u.mlme.data = AUTH_EVENT,
6781 .u.mlme.status = MLME_TIMEOUT,
6782 };
6783
6784 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
6785
6786 ieee80211_destroy_auth_data(sdata, false);
6787
6788 cfg80211_auth_timeout(sdata->dev, ap_addr);
6789 drv_event_callback(sdata->local, sdata, &event);
6790 }
6791 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
6792 run_again(sdata, ifmgd->auth_data->timeout);
6793
6794 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
6795 time_after(jiffies, ifmgd->assoc_data->timeout)) {
6796 if ((ifmgd->assoc_data->need_beacon &&
6797 !sdata->deflink.u.mgd.have_beacon) ||
6798 ieee80211_do_assoc(sdata)) {
6799 struct ieee80211_event event = {
6800 .type = MLME_EVENT,
6801 .u.mlme.data = ASSOC_EVENT,
6802 .u.mlme.status = MLME_TIMEOUT,
6803 };
6804
6805 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
6806 drv_event_callback(sdata->local, sdata, &event);
6807 }
6808 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
6809 run_again(sdata, ifmgd->assoc_data->timeout);
6810
6811 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
6812 ifmgd->associated) {
6813 u8 *bssid = sdata->deflink.u.mgd.bssid;
6814 int max_tries;
6815
6816 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6817 max_tries = max_nullfunc_tries;
6818 else
6819 max_tries = max_probe_tries;
6820
6821 /* ACK received for nullfunc probing frame */
6822 if (!ifmgd->probe_send_count)
6823 ieee80211_reset_ap_probe(sdata);
6824 else if (ifmgd->nullfunc_failed) {
6825 if (ifmgd->probe_send_count < max_tries) {
6826 mlme_dbg(sdata,
6827 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
6828 bssid, ifmgd->probe_send_count,
6829 max_tries);
6830 ieee80211_mgd_probe_ap_send(sdata);
6831 } else {
6832 mlme_dbg(sdata,
6833 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
6834 bssid);
6835 ieee80211_sta_connection_lost(sdata,
6836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
6837 false);
6838 }
6839 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
6840 run_again(sdata, ifmgd->probe_timeout);
6841 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6842 mlme_dbg(sdata,
6843 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
6844 bssid, probe_wait_ms);
6845 ieee80211_sta_connection_lost(sdata,
6846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6847 } else if (ifmgd->probe_send_count < max_tries) {
6848 mlme_dbg(sdata,
6849 "No probe response from AP %pM after %dms, try %d/%i\n",
6850 bssid, probe_wait_ms,
6851 ifmgd->probe_send_count, max_tries);
6852 ieee80211_mgd_probe_ap_send(sdata);
6853 } else {
6854 /*
6855 * We actually lost the connection ... or did we?
6856 * Let's make sure!
6857 */
6858 mlme_dbg(sdata,
6859 "No probe response from AP %pM after %dms, disconnecting.\n",
6860 bssid, probe_wait_ms);
6861
6862 ieee80211_sta_connection_lost(sdata,
6863 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6864 }
6865 }
6866 }
6867
ieee80211_sta_bcn_mon_timer(struct timer_list * t)6868 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
6869 {
6870 struct ieee80211_sub_if_data *sdata =
6871 from_timer(sdata, t, u.mgd.bcn_mon_timer);
6872
6873 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
6874 return;
6875
6876 if (sdata->vif.bss_conf.csa_active &&
6877 !sdata->deflink.u.mgd.csa_waiting_bcn)
6878 return;
6879
6880 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
6881 return;
6882
6883 sdata->u.mgd.connection_loss = false;
6884 wiphy_work_queue(sdata->local->hw.wiphy,
6885 &sdata->u.mgd.beacon_connection_loss_work);
6886 }
6887
ieee80211_sta_conn_mon_timer(struct timer_list * t)6888 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
6889 {
6890 struct ieee80211_sub_if_data *sdata =
6891 from_timer(sdata, t, u.mgd.conn_mon_timer);
6892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6893 struct ieee80211_local *local = sdata->local;
6894 struct sta_info *sta;
6895 unsigned long timeout;
6896
6897 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
6898 return;
6899
6900 if (sdata->vif.bss_conf.csa_active &&
6901 !sdata->deflink.u.mgd.csa_waiting_bcn)
6902 return;
6903
6904 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6905 if (!sta)
6906 return;
6907
6908 timeout = sta->deflink.status_stats.last_ack;
6909 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
6910 timeout = sta->deflink.rx_stats.last_rx;
6911 timeout += IEEE80211_CONNECTION_IDLE_TIME;
6912
6913 /* If timeout is after now, then update timer to fire at
6914 * the later date, but do not actually probe at this time.
6915 */
6916 if (time_is_after_jiffies(timeout)) {
6917 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
6918 return;
6919 }
6920
6921 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work);
6922 }
6923
ieee80211_sta_monitor_work(struct wiphy * wiphy,struct wiphy_work * work)6924 static void ieee80211_sta_monitor_work(struct wiphy *wiphy,
6925 struct wiphy_work *work)
6926 {
6927 struct ieee80211_sub_if_data *sdata =
6928 container_of(work, struct ieee80211_sub_if_data,
6929 u.mgd.monitor_work);
6930
6931 ieee80211_mgd_probe_ap(sdata, false);
6932 }
6933
ieee80211_restart_sta_timer(struct ieee80211_sub_if_data * sdata)6934 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
6935 {
6936 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
6937 __ieee80211_stop_poll(sdata);
6938
6939 /* let's probe the connection once */
6940 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
6941 wiphy_work_queue(sdata->local->hw.wiphy,
6942 &sdata->u.mgd.monitor_work);
6943 }
6944 }
6945
6946 #ifdef CONFIG_PM
ieee80211_mgd_quiesce(struct ieee80211_sub_if_data * sdata)6947 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
6948 {
6949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6950 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6951
6952 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6953
6954 if (ifmgd->auth_data || ifmgd->assoc_data) {
6955 const u8 *ap_addr = ifmgd->auth_data ?
6956 ifmgd->auth_data->ap_addr :
6957 ifmgd->assoc_data->ap_addr;
6958
6959 /*
6960 * If we are trying to authenticate / associate while suspending,
6961 * cfg80211 won't know and won't actually abort those attempts,
6962 * thus we need to do that ourselves.
6963 */
6964 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
6965 IEEE80211_STYPE_DEAUTH,
6966 WLAN_REASON_DEAUTH_LEAVING,
6967 false, frame_buf);
6968 if (ifmgd->assoc_data)
6969 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
6970 if (ifmgd->auth_data)
6971 ieee80211_destroy_auth_data(sdata, false);
6972 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
6973 IEEE80211_DEAUTH_FRAME_LEN,
6974 false);
6975 }
6976
6977 /* This is a bit of a hack - we should find a better and more generic
6978 * solution to this. Normally when suspending, cfg80211 will in fact
6979 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
6980 * auth (not so important) or assoc (this is the problem) process.
6981 *
6982 * As a consequence, it can happen that we are in the process of both
6983 * associating and suspending, and receive an association response
6984 * after cfg80211 has checked if it needs to disconnect, but before
6985 * we actually set the flag to drop incoming frames. This will then
6986 * cause the workqueue flush to process the association response in
6987 * the suspend, resulting in a successful association just before it
6988 * tries to remove the interface from the driver, which now though
6989 * has a channel context assigned ... this results in issues.
6990 *
6991 * To work around this (for now) simply deauth here again if we're
6992 * now connected.
6993 */
6994 if (ifmgd->associated && !sdata->local->wowlan) {
6995 u8 bssid[ETH_ALEN];
6996 struct cfg80211_deauth_request req = {
6997 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
6998 .bssid = bssid,
6999 };
7000
7001 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
7002 ieee80211_mgd_deauth(sdata, &req);
7003 }
7004 }
7005 #endif
7006
ieee80211_sta_restart(struct ieee80211_sub_if_data * sdata)7007 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
7008 {
7009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7010
7011 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7012
7013 if (!ifmgd->associated)
7014 return;
7015
7016 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
7017 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
7018 mlme_dbg(sdata, "driver requested disconnect after resume\n");
7019 ieee80211_sta_connection_lost(sdata,
7020 WLAN_REASON_UNSPECIFIED,
7021 true);
7022 return;
7023 }
7024
7025 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
7026 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
7027 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
7028 ieee80211_sta_connection_lost(sdata,
7029 WLAN_REASON_UNSPECIFIED,
7030 true);
7031 return;
7032 }
7033 }
7034
ieee80211_request_smps_mgd_work(struct wiphy * wiphy,struct wiphy_work * work)7035 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy,
7036 struct wiphy_work *work)
7037 {
7038 struct ieee80211_link_data *link =
7039 container_of(work, struct ieee80211_link_data,
7040 u.mgd.request_smps_work);
7041
7042 __ieee80211_request_smps_mgd(link->sdata, link,
7043 link->u.mgd.driver_smps_mode);
7044 }
7045
7046 /* interface setup */
ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data * sdata)7047 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
7048 {
7049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7050
7051 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
7052 wiphy_work_init(&ifmgd->beacon_connection_loss_work,
7053 ieee80211_beacon_connection_loss_work);
7054 wiphy_work_init(&ifmgd->csa_connection_drop_work,
7055 ieee80211_csa_connection_drop_work);
7056 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work,
7057 ieee80211_tdls_peer_del_work);
7058 wiphy_delayed_work_init(&ifmgd->ml_reconf_work,
7059 ieee80211_ml_reconf_work);
7060 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
7061 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
7062 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
7063 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk,
7064 ieee80211_sta_handle_tspec_ac_params_wk);
7065 wiphy_delayed_work_init(&ifmgd->ttlm_work,
7066 ieee80211_tid_to_link_map_work);
7067
7068 ifmgd->flags = 0;
7069 ifmgd->powersave = sdata->wdev.ps;
7070 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
7071 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
7072 /* Setup TDLS data */
7073 spin_lock_init(&ifmgd->teardown_lock);
7074 ifmgd->teardown_skb = NULL;
7075 ifmgd->orig_teardown_skb = NULL;
7076 }
7077
ieee80211_recalc_smps_work(struct wiphy * wiphy,struct wiphy_work * work)7078 static void ieee80211_recalc_smps_work(struct wiphy *wiphy,
7079 struct wiphy_work *work)
7080 {
7081 struct ieee80211_link_data *link =
7082 container_of(work, struct ieee80211_link_data,
7083 u.mgd.recalc_smps);
7084
7085 ieee80211_recalc_smps(link->sdata, link);
7086 }
7087
ieee80211_mgd_setup_link(struct ieee80211_link_data * link)7088 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
7089 {
7090 struct ieee80211_sub_if_data *sdata = link->sdata;
7091 struct ieee80211_local *local = sdata->local;
7092 unsigned int link_id = link->link_id;
7093
7094 link->u.mgd.p2p_noa_index = -1;
7095 link->u.mgd.conn_flags = 0;
7096 link->conf->bssid = link->u.mgd.bssid;
7097 link->smps_mode = IEEE80211_SMPS_OFF;
7098
7099 wiphy_work_init(&link->u.mgd.request_smps_work,
7100 ieee80211_request_smps_mgd_work);
7101 wiphy_work_init(&link->u.mgd.recalc_smps,
7102 ieee80211_recalc_smps_work);
7103 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
7104 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
7105 else
7106 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
7107
7108 wiphy_delayed_work_init(&link->u.mgd.chswitch_work,
7109 ieee80211_chswitch_work);
7110
7111 if (sdata->u.mgd.assoc_data)
7112 ether_addr_copy(link->conf->addr,
7113 sdata->u.mgd.assoc_data->link[link_id].addr);
7114 else if (!is_valid_ether_addr(link->conf->addr))
7115 eth_random_addr(link->conf->addr);
7116 }
7117
7118 /* scan finished notification */
ieee80211_mlme_notify_scan_completed(struct ieee80211_local * local)7119 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
7120 {
7121 struct ieee80211_sub_if_data *sdata;
7122
7123 /* Restart STA timers */
7124 rcu_read_lock();
7125 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
7126 if (ieee80211_sdata_running(sdata))
7127 ieee80211_restart_sta_timer(sdata);
7128 }
7129 rcu_read_unlock();
7130 }
7131
ieee80211_prep_connection(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,s8 link_id,const u8 * ap_mld_addr,bool assoc,bool override)7132 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
7133 struct cfg80211_bss *cbss, s8 link_id,
7134 const u8 *ap_mld_addr, bool assoc,
7135 bool override)
7136 {
7137 struct ieee80211_local *local = sdata->local;
7138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7139 struct ieee80211_bss *bss = (void *)cbss->priv;
7140 struct sta_info *new_sta = NULL;
7141 struct ieee80211_link_data *link;
7142 bool have_sta = false;
7143 bool mlo;
7144 int err;
7145
7146 if (link_id >= 0) {
7147 mlo = true;
7148 if (WARN_ON(!ap_mld_addr))
7149 return -EINVAL;
7150 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0);
7151 } else {
7152 if (WARN_ON(ap_mld_addr))
7153 return -EINVAL;
7154 ap_mld_addr = cbss->bssid;
7155 err = ieee80211_vif_set_links(sdata, 0, 0);
7156 link_id = 0;
7157 mlo = false;
7158 }
7159
7160 if (err)
7161 return err;
7162
7163 link = sdata_dereference(sdata->link[link_id], sdata);
7164 if (WARN_ON(!link)) {
7165 err = -ENOLINK;
7166 goto out_err;
7167 }
7168
7169 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
7170 err = -EINVAL;
7171 goto out_err;
7172 }
7173
7174 /* If a reconfig is happening, bail out */
7175 if (local->in_reconfig) {
7176 err = -EBUSY;
7177 goto out_err;
7178 }
7179
7180 if (assoc) {
7181 rcu_read_lock();
7182 have_sta = sta_info_get(sdata, ap_mld_addr);
7183 rcu_read_unlock();
7184 }
7185
7186 if (!have_sta) {
7187 if (mlo)
7188 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
7189 link_id, cbss->bssid,
7190 GFP_KERNEL);
7191 else
7192 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
7193
7194 if (!new_sta) {
7195 err = -ENOMEM;
7196 goto out_err;
7197 }
7198
7199 new_sta->sta.mlo = mlo;
7200 }
7201
7202 /*
7203 * Set up the information for the new channel before setting the
7204 * new channel. We can't - completely race-free - change the basic
7205 * rates bitmap and the channel (sband) that it refers to, but if
7206 * we set it up before we at least avoid calling into the driver's
7207 * bss_info_changed() method with invalid information (since we do
7208 * call that from changing the channel - only for IDLE and perhaps
7209 * some others, but ...).
7210 *
7211 * So to avoid that, just set up all the new information before the
7212 * channel, but tell the driver to apply it only afterwards, since
7213 * it might need the new channel for that.
7214 */
7215 if (new_sta) {
7216 const struct cfg80211_bss_ies *ies;
7217 struct link_sta_info *link_sta;
7218
7219 rcu_read_lock();
7220 link_sta = rcu_dereference(new_sta->link[link_id]);
7221 if (WARN_ON(!link_sta)) {
7222 rcu_read_unlock();
7223 sta_info_free(local, new_sta);
7224 err = -EINVAL;
7225 goto out_err;
7226 }
7227
7228 err = ieee80211_mgd_setup_link_sta(link, new_sta,
7229 link_sta, cbss);
7230 if (err) {
7231 rcu_read_unlock();
7232 sta_info_free(local, new_sta);
7233 goto out_err;
7234 }
7235
7236 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
7237
7238 /* set timing information */
7239 link->conf->beacon_int = cbss->beacon_interval;
7240 ies = rcu_dereference(cbss->beacon_ies);
7241 if (ies) {
7242 link->conf->sync_tsf = ies->tsf;
7243 link->conf->sync_device_ts =
7244 bss->device_ts_beacon;
7245
7246 ieee80211_get_dtim(ies,
7247 &link->conf->sync_dtim_count,
7248 NULL);
7249 } else if (!ieee80211_hw_check(&sdata->local->hw,
7250 TIMING_BEACON_ONLY)) {
7251 ies = rcu_dereference(cbss->proberesp_ies);
7252 /* must be non-NULL since beacon IEs were NULL */
7253 link->conf->sync_tsf = ies->tsf;
7254 link->conf->sync_device_ts =
7255 bss->device_ts_presp;
7256 link->conf->sync_dtim_count = 0;
7257 } else {
7258 link->conf->sync_tsf = 0;
7259 link->conf->sync_device_ts = 0;
7260 link->conf->sync_dtim_count = 0;
7261 }
7262 rcu_read_unlock();
7263 }
7264
7265 if (new_sta || override) {
7266 err = ieee80211_prep_channel(sdata, link, cbss, mlo,
7267 &link->u.mgd.conn_flags);
7268 if (err) {
7269 if (new_sta)
7270 sta_info_free(local, new_sta);
7271 goto out_err;
7272 }
7273 }
7274
7275 if (new_sta) {
7276 /*
7277 * tell driver about BSSID, basic rates and timing
7278 * this was set up above, before setting the channel
7279 */
7280 ieee80211_link_info_change_notify(sdata, link,
7281 BSS_CHANGED_BSSID |
7282 BSS_CHANGED_BASIC_RATES |
7283 BSS_CHANGED_BEACON_INT);
7284
7285 if (assoc)
7286 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
7287
7288 err = sta_info_insert(new_sta);
7289 new_sta = NULL;
7290 if (err) {
7291 sdata_info(sdata,
7292 "failed to insert STA entry for the AP (error %d)\n",
7293 err);
7294 goto out_err;
7295 }
7296 } else
7297 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
7298
7299 /* Cancel scan to ensure that nothing interferes with connection */
7300 if (local->scanning)
7301 ieee80211_scan_cancel(local);
7302
7303 return 0;
7304
7305 out_err:
7306 ieee80211_link_release_channel(&sdata->deflink);
7307 ieee80211_vif_set_links(sdata, 0, 0);
7308 return err;
7309 }
7310
ieee80211_mgd_csa_present(struct ieee80211_sub_if_data * sdata,const struct cfg80211_bss_ies * ies,u8 cur_channel,bool ignore_ecsa)7311 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata,
7312 const struct cfg80211_bss_ies *ies,
7313 u8 cur_channel, bool ignore_ecsa)
7314 {
7315 const struct element *csa_elem, *ecsa_elem;
7316 struct ieee80211_channel_sw_ie *csa = NULL;
7317 struct ieee80211_ext_chansw_ie *ecsa = NULL;
7318
7319 if (!ies)
7320 return false;
7321
7322 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH,
7323 ies->data, ies->len);
7324 if (csa_elem && csa_elem->datalen == sizeof(*csa))
7325 csa = (void *)csa_elem->data;
7326
7327 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN,
7328 ies->data, ies->len);
7329 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa))
7330 ecsa = (void *)ecsa_elem->data;
7331
7332 if (csa && csa->count == 0)
7333 csa = NULL;
7334 if (csa && !csa->mode && csa->new_ch_num == cur_channel)
7335 csa = NULL;
7336
7337 if (ecsa && ecsa->count == 0)
7338 ecsa = NULL;
7339 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel)
7340 ecsa = NULL;
7341
7342 if (ignore_ecsa && ecsa) {
7343 sdata_info(sdata,
7344 "Ignoring ECSA in probe response - was considered stuck!\n");
7345 return csa;
7346 }
7347
7348 return csa || ecsa;
7349 }
7350
ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * bss)7351 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata,
7352 struct cfg80211_bss *bss)
7353 {
7354 u8 cur_channel;
7355 bool ret;
7356
7357 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq);
7358
7359 rcu_read_lock();
7360 if (ieee80211_mgd_csa_present(sdata,
7361 rcu_dereference(bss->beacon_ies),
7362 cur_channel, false)) {
7363 ret = true;
7364 goto out;
7365 }
7366
7367 if (ieee80211_mgd_csa_present(sdata,
7368 rcu_dereference(bss->proberesp_ies),
7369 cur_channel, bss->proberesp_ecsa_stuck)) {
7370 ret = true;
7371 goto out;
7372 }
7373
7374 ret = false;
7375 out:
7376 rcu_read_unlock();
7377 return ret;
7378 }
7379
7380 /* config hooks */
ieee80211_mgd_auth(struct ieee80211_sub_if_data * sdata,struct cfg80211_auth_request * req)7381 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
7382 struct cfg80211_auth_request *req)
7383 {
7384 struct ieee80211_local *local = sdata->local;
7385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7386 struct ieee80211_mgd_auth_data *auth_data;
7387 struct ieee80211_link_data *link;
7388 u16 auth_alg;
7389 int err;
7390 bool cont_auth;
7391
7392 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7393
7394 /* prepare auth data structure */
7395
7396 switch (req->auth_type) {
7397 case NL80211_AUTHTYPE_OPEN_SYSTEM:
7398 auth_alg = WLAN_AUTH_OPEN;
7399 break;
7400 case NL80211_AUTHTYPE_SHARED_KEY:
7401 if (fips_enabled)
7402 return -EOPNOTSUPP;
7403 auth_alg = WLAN_AUTH_SHARED_KEY;
7404 break;
7405 case NL80211_AUTHTYPE_FT:
7406 auth_alg = WLAN_AUTH_FT;
7407 break;
7408 case NL80211_AUTHTYPE_NETWORK_EAP:
7409 auth_alg = WLAN_AUTH_LEAP;
7410 break;
7411 case NL80211_AUTHTYPE_SAE:
7412 auth_alg = WLAN_AUTH_SAE;
7413 break;
7414 case NL80211_AUTHTYPE_FILS_SK:
7415 auth_alg = WLAN_AUTH_FILS_SK;
7416 break;
7417 case NL80211_AUTHTYPE_FILS_SK_PFS:
7418 auth_alg = WLAN_AUTH_FILS_SK_PFS;
7419 break;
7420 case NL80211_AUTHTYPE_FILS_PK:
7421 auth_alg = WLAN_AUTH_FILS_PK;
7422 break;
7423 default:
7424 return -EOPNOTSUPP;
7425 }
7426
7427 if (ifmgd->assoc_data)
7428 return -EBUSY;
7429
7430 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) {
7431 sdata_info(sdata, "AP is in CSA process, reject auth\n");
7432 return -EINVAL;
7433 }
7434
7435 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
7436 req->ie_len, GFP_KERNEL);
7437 if (!auth_data)
7438 return -ENOMEM;
7439
7440 memcpy(auth_data->ap_addr,
7441 req->ap_mld_addr ?: req->bss->bssid,
7442 ETH_ALEN);
7443 auth_data->bss = req->bss;
7444 auth_data->link_id = req->link_id;
7445
7446 if (req->auth_data_len >= 4) {
7447 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
7448 __le16 *pos = (__le16 *) req->auth_data;
7449
7450 auth_data->sae_trans = le16_to_cpu(pos[0]);
7451 auth_data->sae_status = le16_to_cpu(pos[1]);
7452 }
7453 memcpy(auth_data->data, req->auth_data + 4,
7454 req->auth_data_len - 4);
7455 auth_data->data_len += req->auth_data_len - 4;
7456 }
7457
7458 /* Check if continuing authentication or trying to authenticate with the
7459 * same BSS that we were in the process of authenticating with and avoid
7460 * removal and re-addition of the STA entry in
7461 * ieee80211_prep_connection().
7462 */
7463 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
7464 ifmgd->auth_data->link_id == req->link_id;
7465
7466 if (req->ie && req->ie_len) {
7467 memcpy(&auth_data->data[auth_data->data_len],
7468 req->ie, req->ie_len);
7469 auth_data->data_len += req->ie_len;
7470 }
7471
7472 if (req->key && req->key_len) {
7473 auth_data->key_len = req->key_len;
7474 auth_data->key_idx = req->key_idx;
7475 memcpy(auth_data->key, req->key, req->key_len);
7476 }
7477
7478 auth_data->algorithm = auth_alg;
7479
7480 /* try to authenticate/probe */
7481
7482 if (ifmgd->auth_data) {
7483 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
7484 auth_data->peer_confirmed =
7485 ifmgd->auth_data->peer_confirmed;
7486 }
7487 ieee80211_destroy_auth_data(sdata, cont_auth);
7488 }
7489
7490 /* prep auth_data so we don't go into idle on disassoc */
7491 ifmgd->auth_data = auth_data;
7492
7493 /* If this is continuation of an ongoing SAE authentication exchange
7494 * (i.e., request to send SAE Confirm) and the peer has already
7495 * confirmed, mark authentication completed since we are about to send
7496 * out SAE Confirm.
7497 */
7498 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
7499 auth_data->peer_confirmed && auth_data->sae_trans == 2)
7500 ieee80211_mark_sta_auth(sdata);
7501
7502 if (ifmgd->associated) {
7503 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7504
7505 sdata_info(sdata,
7506 "disconnect from AP %pM for new auth to %pM\n",
7507 sdata->vif.cfg.ap_addr, auth_data->ap_addr);
7508 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7509 WLAN_REASON_UNSPECIFIED,
7510 false, frame_buf);
7511
7512 ieee80211_report_disconnect(sdata, frame_buf,
7513 sizeof(frame_buf), true,
7514 WLAN_REASON_UNSPECIFIED,
7515 false);
7516 }
7517
7518 /* needed for transmitting the auth frame(s) properly */
7519 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
7520
7521 err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
7522 req->ap_mld_addr, cont_auth, false);
7523 if (err)
7524 goto err_clear;
7525
7526 if (req->link_id > 0)
7527 link = sdata_dereference(sdata->link[req->link_id], sdata);
7528 else
7529 link = sdata_dereference(sdata->link[0], sdata);
7530
7531 if (WARN_ON(!link)) {
7532 err = -ENOLINK;
7533 goto err_clear;
7534 }
7535
7536 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n",
7537 auth_data->ap_addr, link->conf->addr);
7538
7539 err = ieee80211_auth(sdata);
7540 if (err) {
7541 sta_info_destroy_addr(sdata, auth_data->ap_addr);
7542 goto err_clear;
7543 }
7544
7545 /* hold our own reference */
7546 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
7547 return 0;
7548
7549 err_clear:
7550 if (!ieee80211_vif_is_mld(&sdata->vif)) {
7551 eth_zero_addr(sdata->deflink.u.mgd.bssid);
7552 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7553 BSS_CHANGED_BSSID);
7554 ieee80211_link_release_channel(&sdata->deflink);
7555 }
7556 ifmgd->auth_data = NULL;
7557 kfree(auth_data);
7558 return err;
7559 }
7560
7561 static ieee80211_conn_flags_t
ieee80211_setup_assoc_link(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,struct cfg80211_assoc_request * req,ieee80211_conn_flags_t conn_flags,unsigned int link_id)7562 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
7563 struct ieee80211_mgd_assoc_data *assoc_data,
7564 struct cfg80211_assoc_request *req,
7565 ieee80211_conn_flags_t conn_flags,
7566 unsigned int link_id)
7567 {
7568 struct ieee80211_local *local = sdata->local;
7569 const struct cfg80211_bss_ies *bss_ies;
7570 struct ieee80211_supported_band *sband;
7571 const struct element *ht_elem, *vht_elem;
7572 struct ieee80211_link_data *link;
7573 struct cfg80211_bss *cbss;
7574 struct ieee80211_bss *bss;
7575 bool is_5ghz, is_6ghz;
7576
7577 cbss = assoc_data->link[link_id].bss;
7578 if (WARN_ON(!cbss))
7579 return 0;
7580
7581 bss = (void *)cbss->priv;
7582
7583 sband = local->hw.wiphy->bands[cbss->channel->band];
7584 if (WARN_ON(!sband))
7585 return 0;
7586
7587 link = sdata_dereference(sdata->link[link_id], sdata);
7588 if (WARN_ON(!link))
7589 return 0;
7590
7591 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
7592 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
7593
7594 /* for MLO connections assume advertising all rates is OK */
7595 if (!req->ap_mld_addr) {
7596 assoc_data->supp_rates = bss->supp_rates;
7597 assoc_data->supp_rates_len = bss->supp_rates_len;
7598 }
7599
7600 /* copy and link elems for the STA profile */
7601 if (req->links[link_id].elems_len) {
7602 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
7603 req->links[link_id].elems_len);
7604 assoc_data->link[link_id].elems = assoc_data->ie_pos;
7605 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
7606 assoc_data->ie_pos += req->links[link_id].elems_len;
7607 }
7608
7609 rcu_read_lock();
7610 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
7611 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
7612 assoc_data->link[link_id].ap_ht_param =
7613 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
7614 else if (!is_6ghz)
7615 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7616 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
7617 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
7618 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
7619 sizeof(struct ieee80211_vht_cap));
7620 } else if (is_5ghz) {
7621 link_info(link,
7622 "VHT capa missing/short, disabling VHT/HE/EHT\n");
7623 conn_flags |= IEEE80211_CONN_DISABLE_VHT |
7624 IEEE80211_CONN_DISABLE_HE |
7625 IEEE80211_CONN_DISABLE_EHT;
7626 }
7627 rcu_read_unlock();
7628
7629 link->u.mgd.beacon_crc_valid = false;
7630 link->u.mgd.dtim_period = 0;
7631 link->u.mgd.have_beacon = false;
7632
7633 /* override HT/VHT configuration only if the AP and we support it */
7634 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
7635 struct ieee80211_sta_ht_cap sta_ht_cap;
7636
7637 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
7638 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
7639 }
7640
7641 link->conf->eht_puncturing = 0;
7642
7643 rcu_read_lock();
7644 bss_ies = rcu_dereference(cbss->beacon_ies);
7645 if (bss_ies) {
7646 u8 dtim_count = 0;
7647
7648 ieee80211_get_dtim(bss_ies, &dtim_count,
7649 &link->u.mgd.dtim_period);
7650
7651 sdata->deflink.u.mgd.have_beacon = true;
7652
7653 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
7654 link->conf->sync_tsf = bss_ies->tsf;
7655 link->conf->sync_device_ts = bss->device_ts_beacon;
7656 link->conf->sync_dtim_count = dtim_count;
7657 }
7658 } else {
7659 bss_ies = rcu_dereference(cbss->ies);
7660 }
7661
7662 if (bss_ies) {
7663 const struct ieee80211_eht_operation *eht_oper;
7664 const struct element *elem;
7665
7666 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
7667 bss_ies->data, bss_ies->len);
7668 if (elem && elem->datalen >= 3)
7669 link->conf->profile_periodicity = elem->data[2];
7670 else
7671 link->conf->profile_periodicity = 0;
7672
7673 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
7674 bss_ies->data, bss_ies->len);
7675 if (elem && elem->datalen >= 11 &&
7676 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
7677 link->conf->ema_ap = true;
7678 else
7679 link->conf->ema_ap = false;
7680
7681 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION,
7682 bss_ies->data, bss_ies->len);
7683 eht_oper = (const void *)(elem->data + 1);
7684
7685 if (elem &&
7686 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1),
7687 elem->datalen - 1) &&
7688 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) &&
7689 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) {
7690 const struct ieee80211_eht_operation_info *info =
7691 (void *)eht_oper->optional;
7692 const u8 *disable_subchannel_bitmap = info->optional;
7693 u16 bitmap;
7694
7695 bitmap = get_unaligned_le16(disable_subchannel_bitmap);
7696 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap,
7697 &link->conf->chandef) &&
7698 !(bitmap && ieee80211_hw_check(&local->hw, DISALLOW_PUNCTURING)))
7699 ieee80211_handle_puncturing_bitmap(link,
7700 eht_oper,
7701 bitmap,
7702 NULL);
7703 else
7704 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7705 }
7706 }
7707 rcu_read_unlock();
7708
7709 if (bss->corrupt_data) {
7710 char *corrupt_type = "data";
7711
7712 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
7713 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
7714 corrupt_type = "beacon and probe response";
7715 else
7716 corrupt_type = "beacon";
7717 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
7718 corrupt_type = "probe response";
7719 }
7720 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
7721 cbss->bssid, corrupt_type);
7722 }
7723
7724 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
7725 if (sdata->u.mgd.powersave)
7726 link->smps_mode = IEEE80211_SMPS_DYNAMIC;
7727 else
7728 link->smps_mode = IEEE80211_SMPS_OFF;
7729 } else {
7730 link->smps_mode = link->u.mgd.req_smps;
7731 }
7732
7733 return conn_flags;
7734 }
7735
ieee80211_mgd_assoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_assoc_request * req)7736 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
7737 struct cfg80211_assoc_request *req)
7738 {
7739 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
7740 struct ieee80211_local *local = sdata->local;
7741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7742 struct ieee80211_mgd_assoc_data *assoc_data;
7743 const struct element *ssid_elem;
7744 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
7745 ieee80211_conn_flags_t conn_flags = 0;
7746 struct ieee80211_link_data *link;
7747 struct cfg80211_bss *cbss;
7748 struct ieee80211_bss *bss;
7749 bool override;
7750 int i, err;
7751 size_t size = sizeof(*assoc_data) + req->ie_len;
7752
7753 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
7754 size += req->links[i].elems_len;
7755
7756 /* FIXME: no support for 4-addr MLO yet */
7757 if (sdata->u.mgd.use_4addr && req->link_id >= 0)
7758 return -EOPNOTSUPP;
7759
7760 assoc_data = kzalloc(size, GFP_KERNEL);
7761 if (!assoc_data)
7762 return -ENOMEM;
7763
7764 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
7765
7766 if (ieee80211_mgd_csa_in_process(sdata, cbss)) {
7767 sdata_info(sdata, "AP is in CSA process, reject assoc\n");
7768 kfree(assoc_data);
7769 return -EINVAL;
7770 }
7771
7772 rcu_read_lock();
7773 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
7774 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
7775 rcu_read_unlock();
7776 kfree(assoc_data);
7777 return -EINVAL;
7778 }
7779
7780 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
7781 assoc_data->ssid_len = ssid_elem->datalen;
7782 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
7783 vif_cfg->ssid_len = assoc_data->ssid_len;
7784 rcu_read_unlock();
7785
7786 if (req->ap_mld_addr) {
7787 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
7788 if (!req->links[i].bss)
7789 continue;
7790 link = sdata_dereference(sdata->link[i], sdata);
7791 if (link)
7792 ether_addr_copy(assoc_data->link[i].addr,
7793 link->conf->addr);
7794 else
7795 eth_random_addr(assoc_data->link[i].addr);
7796 }
7797 } else {
7798 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
7799 }
7800
7801 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
7802
7803 memcpy(assoc_data->ap_addr,
7804 req->ap_mld_addr ?: req->bss->bssid,
7805 ETH_ALEN);
7806
7807 if (ifmgd->associated) {
7808 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7809
7810 sdata_info(sdata,
7811 "disconnect from AP %pM for new assoc to %pM\n",
7812 sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
7813 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7814 WLAN_REASON_UNSPECIFIED,
7815 false, frame_buf);
7816
7817 ieee80211_report_disconnect(sdata, frame_buf,
7818 sizeof(frame_buf), true,
7819 WLAN_REASON_UNSPECIFIED,
7820 false);
7821 }
7822
7823 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
7824 err = -EBUSY;
7825 goto err_free;
7826 }
7827
7828 if (ifmgd->assoc_data) {
7829 err = -EBUSY;
7830 goto err_free;
7831 }
7832
7833 if (ifmgd->auth_data) {
7834 bool match;
7835
7836 /* keep sta info, bssid if matching */
7837 match = ether_addr_equal(ifmgd->auth_data->ap_addr,
7838 assoc_data->ap_addr) &&
7839 ifmgd->auth_data->link_id == req->link_id;
7840
7841 /* Cleanup is delayed if auth_data matches */
7842 if (!match)
7843 ieee80211_destroy_auth_data(sdata, false);
7844 }
7845
7846 /* prepare assoc data */
7847
7848 bss = (void *)cbss->priv;
7849 assoc_data->wmm = bss->wmm_used &&
7850 (local->hw.queues >= IEEE80211_NUM_ACS);
7851
7852 /*
7853 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
7854 * We still associate in non-HT mode (11a/b/g) if any one of these
7855 * ciphers is configured as pairwise.
7856 * We can set this to true for non-11n hardware, that'll be checked
7857 * separately along with the peer capabilities.
7858 */
7859 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
7860 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
7861 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
7862 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
7863 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7864 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7865 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7866 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7867 netdev_info(sdata->dev,
7868 "disabling HT/VHT/HE due to WEP/TKIP use\n");
7869 }
7870 }
7871
7872 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
7873 if (!bss->wmm_used) {
7874 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7875 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7876 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7877 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7878 netdev_info(sdata->dev,
7879 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
7880 }
7881
7882 if (req->flags & ASSOC_REQ_DISABLE_HT) {
7883 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
7884 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7885 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7886 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7887 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7888 }
7889
7890 if (req->flags & ASSOC_REQ_DISABLE_VHT) {
7891 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
7892 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7893 }
7894
7895 if (req->flags & ASSOC_REQ_DISABLE_HE) {
7896 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
7897 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7898 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7899 }
7900
7901 if (req->flags & ASSOC_REQ_DISABLE_EHT)
7902 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7903
7904 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
7905 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
7906 sizeof(ifmgd->ht_capa_mask));
7907
7908 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
7909 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
7910 sizeof(ifmgd->vht_capa_mask));
7911
7912 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
7913 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
7914 sizeof(ifmgd->s1g_capa_mask));
7915
7916 if (req->ie && req->ie_len) {
7917 memcpy(assoc_data->ie, req->ie, req->ie_len);
7918 assoc_data->ie_len = req->ie_len;
7919 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
7920 } else {
7921 assoc_data->ie_pos = assoc_data->ie;
7922 }
7923
7924 if (req->fils_kek) {
7925 /* should already be checked in cfg80211 - so warn */
7926 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
7927 err = -EINVAL;
7928 goto err_free;
7929 }
7930 memcpy(assoc_data->fils_kek, req->fils_kek,
7931 req->fils_kek_len);
7932 assoc_data->fils_kek_len = req->fils_kek_len;
7933 }
7934
7935 if (req->fils_nonces)
7936 memcpy(assoc_data->fils_nonces, req->fils_nonces,
7937 2 * FILS_NONCE_LEN);
7938
7939 /* default timeout */
7940 assoc_data->timeout = jiffies;
7941 assoc_data->timeout_started = true;
7942
7943 assoc_data->assoc_link_id = assoc_link_id;
7944
7945 if (req->ap_mld_addr) {
7946 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7947 assoc_data->link[i].conn_flags = conn_flags;
7948 assoc_data->link[i].bss = req->links[i].bss;
7949 assoc_data->link[i].disabled = req->links[i].disabled;
7950 }
7951
7952 /* if there was no authentication, set up the link */
7953 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0);
7954 if (err)
7955 goto err_clear;
7956 } else {
7957 assoc_data->link[0].conn_flags = conn_flags;
7958 assoc_data->link[0].bss = cbss;
7959 }
7960
7961 link = sdata_dereference(sdata->link[assoc_link_id], sdata);
7962 if (WARN_ON(!link)) {
7963 err = -EINVAL;
7964 goto err_clear;
7965 }
7966
7967 /* keep old conn_flags from ieee80211_prep_channel() from auth */
7968 conn_flags |= link->u.mgd.conn_flags;
7969 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
7970 conn_flags, assoc_link_id);
7971 override = link->u.mgd.conn_flags != conn_flags;
7972 link->u.mgd.conn_flags |= conn_flags;
7973
7974 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
7975 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
7976 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
7977 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
7978
7979 if (bss->wmm_used && bss->uapsd_supported &&
7980 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
7981 assoc_data->uapsd = true;
7982 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
7983 } else {
7984 assoc_data->uapsd = false;
7985 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
7986 }
7987
7988 if (req->prev_bssid)
7989 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
7990
7991 if (req->use_mfp) {
7992 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
7993 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
7994 } else {
7995 ifmgd->mfp = IEEE80211_MFP_DISABLED;
7996 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
7997 }
7998
7999 if (req->flags & ASSOC_REQ_USE_RRM)
8000 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
8001 else
8002 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
8003
8004 if (req->crypto.control_port)
8005 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
8006 else
8007 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
8008
8009 sdata->control_port_protocol = req->crypto.control_port_ethertype;
8010 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
8011 sdata->control_port_over_nl80211 =
8012 req->crypto.control_port_over_nl80211;
8013 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
8014
8015 /* kick off associate process */
8016 ifmgd->assoc_data = assoc_data;
8017
8018 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
8019 if (!assoc_data->link[i].bss)
8020 continue;
8021 if (i == assoc_data->assoc_link_id)
8022 continue;
8023 /* only calculate the flags, hence link == NULL */
8024 err = ieee80211_prep_channel(sdata, NULL,
8025 assoc_data->link[i].bss, true,
8026 &assoc_data->link[i].conn_flags);
8027 if (err) {
8028 req->links[i].error = err;
8029 goto err_clear;
8030 }
8031 }
8032
8033 /* needed for transmitting the assoc frames properly */
8034 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
8035
8036 err = ieee80211_prep_connection(sdata, cbss, req->link_id,
8037 req->ap_mld_addr, true, override);
8038 if (err)
8039 goto err_clear;
8040
8041 assoc_data->link[assoc_data->assoc_link_id].conn_flags =
8042 link->u.mgd.conn_flags;
8043
8044 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
8045 const struct cfg80211_bss_ies *beacon_ies;
8046
8047 rcu_read_lock();
8048 beacon_ies = rcu_dereference(req->bss->beacon_ies);
8049 if (!beacon_ies) {
8050 /*
8051 * Wait up to one beacon interval ...
8052 * should this be more if we miss one?
8053 */
8054 sdata_info(sdata, "waiting for beacon from %pM\n",
8055 link->u.mgd.bssid);
8056 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
8057 assoc_data->timeout_started = true;
8058 assoc_data->need_beacon = true;
8059 }
8060 rcu_read_unlock();
8061 }
8062
8063 run_again(sdata, assoc_data->timeout);
8064
8065 /* We are associating, clean up auth_data */
8066 if (ifmgd->auth_data)
8067 ieee80211_destroy_auth_data(sdata, true);
8068
8069 return 0;
8070 err_clear:
8071 if (!ifmgd->auth_data) {
8072 eth_zero_addr(sdata->deflink.u.mgd.bssid);
8073 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
8074 BSS_CHANGED_BSSID);
8075 }
8076 ifmgd->assoc_data = NULL;
8077 err_free:
8078 kfree(assoc_data);
8079 return err;
8080 }
8081
ieee80211_mgd_deauth(struct ieee80211_sub_if_data * sdata,struct cfg80211_deauth_request * req)8082 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
8083 struct cfg80211_deauth_request *req)
8084 {
8085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8086 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8087 bool tx = !req->local_state_change;
8088 struct ieee80211_prep_tx_info info = {
8089 .subtype = IEEE80211_STYPE_DEAUTH,
8090 };
8091
8092 if (ifmgd->auth_data &&
8093 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
8094 sdata_info(sdata,
8095 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
8096 req->bssid, req->reason_code,
8097 ieee80211_get_reason_code_string(req->reason_code));
8098
8099 info.link_id = ifmgd->auth_data->link_id;
8100 drv_mgd_prepare_tx(sdata->local, sdata, &info);
8101 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
8102 IEEE80211_STYPE_DEAUTH,
8103 req->reason_code, tx,
8104 frame_buf);
8105 ieee80211_destroy_auth_data(sdata, false);
8106 ieee80211_report_disconnect(sdata, frame_buf,
8107 sizeof(frame_buf), true,
8108 req->reason_code, false);
8109 drv_mgd_complete_tx(sdata->local, sdata, &info);
8110 return 0;
8111 }
8112
8113 if (ifmgd->assoc_data &&
8114 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
8115 sdata_info(sdata,
8116 "aborting association with %pM by local choice (Reason: %u=%s)\n",
8117 req->bssid, req->reason_code,
8118 ieee80211_get_reason_code_string(req->reason_code));
8119
8120 info.link_id = ifmgd->assoc_data->assoc_link_id;
8121 drv_mgd_prepare_tx(sdata->local, sdata, &info);
8122 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
8123 IEEE80211_STYPE_DEAUTH,
8124 req->reason_code, tx,
8125 frame_buf);
8126 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
8127 ieee80211_report_disconnect(sdata, frame_buf,
8128 sizeof(frame_buf), true,
8129 req->reason_code, false);
8130 drv_mgd_complete_tx(sdata->local, sdata, &info);
8131 return 0;
8132 }
8133
8134 if (ifmgd->associated &&
8135 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
8136 sdata_info(sdata,
8137 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
8138 req->bssid, req->reason_code,
8139 ieee80211_get_reason_code_string(req->reason_code));
8140
8141 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
8142 req->reason_code, tx, frame_buf);
8143 ieee80211_report_disconnect(sdata, frame_buf,
8144 sizeof(frame_buf), true,
8145 req->reason_code, false);
8146 drv_mgd_complete_tx(sdata->local, sdata, &info);
8147 return 0;
8148 }
8149
8150 return -ENOTCONN;
8151 }
8152
ieee80211_mgd_disassoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_disassoc_request * req)8153 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
8154 struct cfg80211_disassoc_request *req)
8155 {
8156 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8157
8158 if (!sdata->u.mgd.associated ||
8159 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
8160 return -ENOTCONN;
8161
8162 sdata_info(sdata,
8163 "disassociating from %pM by local choice (Reason: %u=%s)\n",
8164 req->ap_addr, req->reason_code,
8165 ieee80211_get_reason_code_string(req->reason_code));
8166
8167 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
8168 req->reason_code, !req->local_state_change,
8169 frame_buf);
8170
8171 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
8172 req->reason_code, false);
8173
8174 return 0;
8175 }
8176
ieee80211_mgd_stop_link(struct ieee80211_link_data * link)8177 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
8178 {
8179 wiphy_work_cancel(link->sdata->local->hw.wiphy,
8180 &link->u.mgd.request_smps_work);
8181 wiphy_work_cancel(link->sdata->local->hw.wiphy,
8182 &link->u.mgd.recalc_smps);
8183 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy,
8184 &link->u.mgd.chswitch_work);
8185 }
8186
ieee80211_mgd_stop(struct ieee80211_sub_if_data * sdata)8187 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
8188 {
8189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8190
8191 /*
8192 * Make sure some work items will not run after this,
8193 * they will not do anything but might not have been
8194 * cancelled when disconnecting.
8195 */
8196 wiphy_work_cancel(sdata->local->hw.wiphy,
8197 &ifmgd->monitor_work);
8198 wiphy_work_cancel(sdata->local->hw.wiphy,
8199 &ifmgd->beacon_connection_loss_work);
8200 wiphy_work_cancel(sdata->local->hw.wiphy,
8201 &ifmgd->csa_connection_drop_work);
8202 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
8203 &ifmgd->tdls_peer_del_work);
8204 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
8205 &ifmgd->ml_reconf_work);
8206 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work);
8207
8208 if (ifmgd->assoc_data)
8209 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
8210 if (ifmgd->auth_data)
8211 ieee80211_destroy_auth_data(sdata, false);
8212 spin_lock_bh(&ifmgd->teardown_lock);
8213 if (ifmgd->teardown_skb) {
8214 kfree_skb(ifmgd->teardown_skb);
8215 ifmgd->teardown_skb = NULL;
8216 ifmgd->orig_teardown_skb = NULL;
8217 }
8218 kfree(ifmgd->assoc_req_ies);
8219 ifmgd->assoc_req_ies = NULL;
8220 ifmgd->assoc_req_ies_len = 0;
8221 spin_unlock_bh(&ifmgd->teardown_lock);
8222 del_timer_sync(&ifmgd->timer);
8223 }
8224
ieee80211_cqm_rssi_notify(struct ieee80211_vif * vif,enum nl80211_cqm_rssi_threshold_event rssi_event,s32 rssi_level,gfp_t gfp)8225 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
8226 enum nl80211_cqm_rssi_threshold_event rssi_event,
8227 s32 rssi_level,
8228 gfp_t gfp)
8229 {
8230 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
8231
8232 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
8233
8234 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
8235 }
8236 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
8237
ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif * vif,gfp_t gfp)8238 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
8239 {
8240 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
8241
8242 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
8243
8244 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
8245 }
8246 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
8247
_ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)8248 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
8249 int rssi_min_thold,
8250 int rssi_max_thold)
8251 {
8252 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
8253
8254 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
8255 return;
8256
8257 /*
8258 * Scale up threshold values before storing it, as the RSSI averaging
8259 * algorithm uses a scaled up value as well. Change this scaling
8260 * factor if the RSSI averaging algorithm changes.
8261 */
8262 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
8263 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
8264 }
8265
ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)8266 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
8267 int rssi_min_thold,
8268 int rssi_max_thold)
8269 {
8270 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
8271
8272 WARN_ON(rssi_min_thold == rssi_max_thold ||
8273 rssi_min_thold > rssi_max_thold);
8274
8275 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
8276 rssi_max_thold);
8277 }
8278 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
8279
ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)8280 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
8281 {
8282 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
8283
8284 _ieee80211_enable_rssi_reports(sdata, 0, 0);
8285 }
8286 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
8287