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 - 2022 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 static int max_nullfunc_tries = 2;
47 module_param(max_nullfunc_tries, int, 0644);
48 MODULE_PARM_DESC(max_nullfunc_tries,
49 "Maximum nullfunc tx tries before disconnecting (reason 4).");
50
51 static int max_probe_tries = 5;
52 module_param(max_probe_tries, int, 0644);
53 MODULE_PARM_DESC(max_probe_tries,
54 "Maximum probe tries before disconnecting (reason 4).");
55
56 /*
57 * Beacon loss timeout is calculated as N frames times the
58 * advertised beacon interval. This may need to be somewhat
59 * higher than what hardware might detect to account for
60 * delays in the host processing frames. But since we also
61 * probe on beacon miss before declaring the connection lost
62 * default to what we want.
63 */
64 static int beacon_loss_count = 7;
65 module_param(beacon_loss_count, int, 0644);
66 MODULE_PARM_DESC(beacon_loss_count,
67 "Number of beacon intervals before we decide beacon was lost.");
68
69 /*
70 * Time the connection can be idle before we probe
71 * it to see if we can still talk to the AP.
72 */
73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
74 /*
75 * Time we wait for a probe response after sending
76 * a probe request because of beacon loss or for
77 * checking the connection still works.
78 */
79 static int probe_wait_ms = 500;
80 module_param(probe_wait_ms, int, 0644);
81 MODULE_PARM_DESC(probe_wait_ms,
82 "Maximum time(ms) to wait for probe response"
83 " before disconnecting (reason 4).");
84
85 /*
86 * How many Beacon frames need to have been used in average signal strength
87 * before starting to indicate signal change events.
88 */
89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
90
91 /*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
run_again(struct ieee80211_sub_if_data * sdata,unsigned long timeout)101 static void run_again(struct ieee80211_sub_if_data *sdata,
102 unsigned long timeout)
103 {
104 sdata_assert_lock(sdata);
105
106 if (!timer_pending(&sdata->u.mgd.timer) ||
107 time_before(timeout, sdata->u.mgd.timer.expires))
108 mod_timer(&sdata->u.mgd.timer, timeout);
109 }
110
ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data * sdata)111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
112 {
113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
114 return;
115
116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
117 return;
118
119 mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
121 }
122
ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data * sdata)123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
124 {
125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
126
127 if (unlikely(!ifmgd->associated))
128 return;
129
130 if (ifmgd->probe_send_count)
131 ifmgd->probe_send_count = 0;
132
133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
134 return;
135
136 mod_timer(&ifmgd->conn_mon_timer,
137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
138 }
139
ecw2cw(int ecw)140 static int ecw2cw(int ecw)
141 {
142 return (1 << ecw) - 1;
143 }
144
145 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)146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
147 struct ieee80211_link_data *link,
148 ieee80211_conn_flags_t conn_flags,
149 struct ieee80211_supported_band *sband,
150 struct ieee80211_channel *channel,
151 u32 vht_cap_info,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
154 const struct ieee80211_he_operation *he_oper,
155 const struct ieee80211_eht_operation *eht_oper,
156 const struct ieee80211_s1g_oper_ie *s1g_oper,
157 struct cfg80211_chan_def *chandef, bool tracking)
158 {
159 struct cfg80211_chan_def vht_chandef;
160 struct ieee80211_sta_ht_cap sta_ht_cap;
161 ieee80211_conn_flags_t ret;
162 u32 ht_cfreq;
163
164 memset(chandef, 0, sizeof(struct cfg80211_chan_def));
165 chandef->chan = channel;
166 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
167 chandef->center_freq1 = channel->center_freq;
168 chandef->freq1_offset = channel->freq_offset;
169
170 if (channel->band == NL80211_BAND_6GHZ) {
171 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
172 chandef)) {
173 mlme_dbg(sdata,
174 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
175 ret = IEEE80211_CONN_DISABLE_HT |
176 IEEE80211_CONN_DISABLE_VHT |
177 IEEE80211_CONN_DISABLE_HE |
178 IEEE80211_CONN_DISABLE_EHT;
179 } else {
180 ret = 0;
181 }
182 vht_chandef = *chandef;
183 goto out;
184 } else if (sband->band == NL80211_BAND_S1GHZ) {
185 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
186 sdata_info(sdata,
187 "Missing S1G Operation Element? Trying operating == primary\n");
188 chandef->width = ieee80211_s1g_channel_width(channel);
189 }
190
191 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ |
192 IEEE80211_CONN_DISABLE_VHT |
193 IEEE80211_CONN_DISABLE_80P80MHZ |
194 IEEE80211_CONN_DISABLE_160MHZ;
195 goto out;
196 }
197
198 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
199 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
200
201 if (!ht_oper || !sta_ht_cap.ht_supported) {
202 mlme_dbg(sdata, "HT operation missing / HT not supported\n");
203 ret = IEEE80211_CONN_DISABLE_HT |
204 IEEE80211_CONN_DISABLE_VHT |
205 IEEE80211_CONN_DISABLE_HE |
206 IEEE80211_CONN_DISABLE_EHT;
207 goto out;
208 }
209
210 chandef->width = NL80211_CHAN_WIDTH_20;
211
212 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
213 channel->band);
214 /* check that channel matches the right operating channel */
215 if (!tracking && channel->center_freq != ht_cfreq) {
216 /*
217 * It's possible that some APs are confused here;
218 * Netgear WNDR3700 sometimes reports 4 higher than
219 * the actual channel in association responses, but
220 * since we look at probe response/beacon data here
221 * it should be OK.
222 */
223 sdata_info(sdata,
224 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
225 channel->center_freq, ht_cfreq,
226 ht_oper->primary_chan, channel->band);
227 ret = IEEE80211_CONN_DISABLE_HT |
228 IEEE80211_CONN_DISABLE_VHT |
229 IEEE80211_CONN_DISABLE_HE |
230 IEEE80211_CONN_DISABLE_EHT;
231 goto out;
232 }
233
234 /* check 40 MHz support, if we have it */
235 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
236 ieee80211_chandef_ht_oper(ht_oper, chandef);
237 } else {
238 mlme_dbg(sdata, "40 MHz not supported\n");
239 /* 40 MHz (and 80 MHz) must be supported for VHT */
240 ret = IEEE80211_CONN_DISABLE_VHT;
241 /* also mark 40 MHz disabled */
242 ret |= IEEE80211_CONN_DISABLE_40MHZ;
243 goto out;
244 }
245
246 if (!vht_oper || !sband->vht_cap.vht_supported) {
247 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n");
248 ret = IEEE80211_CONN_DISABLE_VHT;
249 goto out;
250 }
251
252 vht_chandef = *chandef;
253 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) &&
254 he_oper &&
255 (le32_to_cpu(he_oper->he_oper_params) &
256 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
257 struct ieee80211_vht_operation he_oper_vht_cap;
258
259 /*
260 * Set only first 3 bytes (other 2 aren't used in
261 * ieee80211_chandef_vht_oper() anyway)
262 */
263 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
264 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
265
266 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
267 &he_oper_vht_cap, ht_oper,
268 &vht_chandef)) {
269 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE))
270 sdata_info(sdata,
271 "HE AP VHT information is invalid, disabling HE\n");
272 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
273 goto out;
274 }
275 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
276 vht_cap_info,
277 vht_oper, ht_oper,
278 &vht_chandef)) {
279 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
280 sdata_info(sdata,
281 "AP VHT information is invalid, disabling VHT\n");
282 ret = IEEE80211_CONN_DISABLE_VHT;
283 goto out;
284 }
285
286 if (!cfg80211_chandef_valid(&vht_chandef)) {
287 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
288 sdata_info(sdata,
289 "AP VHT information is invalid, disabling VHT\n");
290 ret = IEEE80211_CONN_DISABLE_VHT;
291 goto out;
292 }
293
294 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
295 ret = 0;
296 goto out;
297 }
298
299 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
300 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT))
301 sdata_info(sdata,
302 "AP VHT information doesn't match HT, disabling VHT\n");
303 ret = IEEE80211_CONN_DISABLE_VHT;
304 goto out;
305 }
306
307 *chandef = vht_chandef;
308
309 /*
310 * handle the case that the EHT operation indicates that it holds EHT
311 * operation information (in case that the channel width differs from
312 * the channel width reported in HT/VHT/HE).
313 */
314 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
315 struct cfg80211_chan_def eht_chandef = *chandef;
316
317 ieee80211_chandef_eht_oper(eht_oper,
318 eht_chandef.width ==
319 NL80211_CHAN_WIDTH_160,
320 false, &eht_chandef);
321
322 if (!cfg80211_chandef_valid(&eht_chandef)) {
323 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
324 sdata_info(sdata,
325 "AP EHT information is invalid, disabling EHT\n");
326 ret = IEEE80211_CONN_DISABLE_EHT;
327 goto out;
328 }
329
330 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
331 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT))
332 sdata_info(sdata,
333 "AP EHT information is incompatible, disabling EHT\n");
334 ret = IEEE80211_CONN_DISABLE_EHT;
335 goto out;
336 }
337
338 *chandef = eht_chandef;
339 }
340
341 ret = 0;
342
343 out:
344 /*
345 * When tracking the current AP, don't do any further checks if the
346 * new chandef is identical to the one we're currently using for the
347 * connection. This keeps us from playing ping-pong with regulatory,
348 * without it the following can happen (for example):
349 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
350 * - AP advertises regdom US
351 * - CRDA loads regdom US with 80 MHz prohibited (old database)
352 * - the code below detects an unsupported channel, downgrades, and
353 * we disconnect from the AP in the caller
354 * - disconnect causes CRDA to reload world regdomain and the game
355 * starts anew.
356 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
357 *
358 * It seems possible that there are still scenarios with CSA or real
359 * bandwidth changes where a this could happen, but those cases are
360 * less common and wouldn't completely prevent using the AP.
361 */
362 if (tracking &&
363 cfg80211_chandef_identical(chandef, &link->conf->chandef))
364 return ret;
365
366 /* don't print the message below for VHT mismatch if VHT is disabled */
367 if (ret & IEEE80211_CONN_DISABLE_VHT)
368 vht_chandef = *chandef;
369
370 /*
371 * Ignore the DISABLED flag when we're already connected and only
372 * tracking the APs beacon for bandwidth changes - otherwise we
373 * might get disconnected here if we connect to an AP, update our
374 * regulatory information based on the AP's country IE and the
375 * information we have is wrong/outdated and disables the channel
376 * that we're actually using for the connection to the AP.
377 */
378 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
379 tracking ? 0 :
380 IEEE80211_CHAN_DISABLED)) {
381 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
382 ret = IEEE80211_CONN_DISABLE_HT |
383 IEEE80211_CONN_DISABLE_VHT |
384 IEEE80211_CONN_DISABLE_HE |
385 IEEE80211_CONN_DISABLE_EHT;
386 break;
387 }
388
389 ret |= ieee80211_chandef_downgrade(chandef);
390 }
391
392 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
393 IEEE80211_CHAN_NO_HE))
394 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT;
395
396 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
397 IEEE80211_CHAN_NO_EHT))
398 ret |= IEEE80211_CONN_DISABLE_EHT;
399
400 if (chandef->width != vht_chandef.width && !tracking)
401 sdata_info(sdata,
402 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
403
404 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
405 return ret;
406 }
407
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,u32 * changed)408 static int ieee80211_config_bw(struct ieee80211_link_data *link,
409 const struct ieee80211_ht_cap *ht_cap,
410 const struct ieee80211_vht_cap *vht_cap,
411 const struct ieee80211_ht_operation *ht_oper,
412 const struct ieee80211_vht_operation *vht_oper,
413 const struct ieee80211_he_operation *he_oper,
414 const struct ieee80211_eht_operation *eht_oper,
415 const struct ieee80211_s1g_oper_ie *s1g_oper,
416 const u8 *bssid, u32 *changed)
417 {
418 struct ieee80211_sub_if_data *sdata = link->sdata;
419 struct ieee80211_local *local = sdata->local;
420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
421 struct ieee80211_channel *chan = link->conf->chandef.chan;
422 struct ieee80211_supported_band *sband =
423 local->hw.wiphy->bands[chan->band];
424 struct cfg80211_chan_def chandef;
425 u16 ht_opmode;
426 ieee80211_conn_flags_t flags;
427 u32 vht_cap_info = 0;
428 int ret;
429
430 /* if HT was/is disabled, don't track any bandwidth changes */
431 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper)
432 return 0;
433
434 /* don't check VHT if we associated as non-VHT station */
435 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
436 vht_oper = NULL;
437
438 /* don't check HE if we associated as non-HE station */
439 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE ||
440 !ieee80211_get_he_iftype_cap(sband,
441 ieee80211_vif_type_p2p(&sdata->vif))) {
442 he_oper = NULL;
443 eht_oper = NULL;
444 }
445
446 /* don't check EHT if we associated as non-EHT station */
447 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT ||
448 !ieee80211_get_eht_iftype_cap(sband,
449 ieee80211_vif_type_p2p(&sdata->vif)))
450 eht_oper = NULL;
451
452 /*
453 * if bss configuration changed store the new one -
454 * this may be applicable even if channel is identical
455 */
456 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
457 if (link->conf->ht_operation_mode != ht_opmode) {
458 *changed |= BSS_CHANGED_HT;
459 link->conf->ht_operation_mode = ht_opmode;
460 }
461
462 if (vht_cap)
463 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info);
464
465 /* calculate new channel (type) based on HT/VHT/HE operation IEs */
466 flags = ieee80211_determine_chantype(sdata, link,
467 link->u.mgd.conn_flags,
468 sband, chan, vht_cap_info,
469 ht_oper, vht_oper,
470 he_oper, eht_oper,
471 s1g_oper, &chandef, true);
472
473 /*
474 * Downgrade the new channel if we associated with restricted
475 * capabilities. For example, if we associated as a 20 MHz STA
476 * to a 40 MHz AP (due to regulatory, capabilities or config
477 * reasons) then switching to a 40 MHz channel now won't do us
478 * any good -- we couldn't use it with the AP.
479 */
480 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
481 chandef.width == NL80211_CHAN_WIDTH_80P80)
482 flags |= ieee80211_chandef_downgrade(&chandef);
483 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
484 chandef.width == NL80211_CHAN_WIDTH_160)
485 flags |= ieee80211_chandef_downgrade(&chandef);
486 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ &&
487 chandef.width > NL80211_CHAN_WIDTH_20)
488 flags |= ieee80211_chandef_downgrade(&chandef);
489
490 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef))
491 return 0;
492
493 link_info(link,
494 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
495 link->u.mgd.bssid, chandef.chan->center_freq,
496 chandef.chan->freq_offset, chandef.width,
497 chandef.center_freq1, chandef.freq1_offset,
498 chandef.center_freq2);
499
500 if (flags != (link->u.mgd.conn_flags &
501 (IEEE80211_CONN_DISABLE_HT |
502 IEEE80211_CONN_DISABLE_VHT |
503 IEEE80211_CONN_DISABLE_HE |
504 IEEE80211_CONN_DISABLE_EHT |
505 IEEE80211_CONN_DISABLE_40MHZ |
506 IEEE80211_CONN_DISABLE_80P80MHZ |
507 IEEE80211_CONN_DISABLE_160MHZ |
508 IEEE80211_CONN_DISABLE_320MHZ)) ||
509 !cfg80211_chandef_valid(&chandef)) {
510 sdata_info(sdata,
511 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
512 link->u.mgd.bssid, flags, ifmgd->flags);
513 return -EINVAL;
514 }
515
516 ret = ieee80211_link_change_bandwidth(link, &chandef, changed);
517
518 if (ret) {
519 sdata_info(sdata,
520 "AP %pM changed bandwidth to incompatible one - disconnect\n",
521 link->u.mgd.bssid);
522 return ret;
523 }
524
525 return 0;
526 }
527
528 /* frame sending functions */
529
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)530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
531 struct sk_buff *skb, u8 ap_ht_param,
532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps,
535 ieee80211_conn_flags_t conn_flags)
536 {
537 u8 *pos;
538 u32 flags = channel->flags;
539 u16 cap;
540 struct ieee80211_sta_ht_cap ht_cap;
541
542 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
543
544 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
545 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
546
547 /* determine capability flags */
548 cap = ht_cap.cap;
549
550 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
551 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
552 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
553 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
554 cap &= ~IEEE80211_HT_CAP_SGI_40;
555 }
556 break;
557 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
558 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
559 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
560 cap &= ~IEEE80211_HT_CAP_SGI_40;
561 }
562 break;
563 }
564
565 /*
566 * If 40 MHz was disabled associate as though we weren't
567 * capable of 40 MHz -- some broken APs will never fall
568 * back to trying to transmit in 20 MHz.
569 */
570 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) {
571 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
572 cap &= ~IEEE80211_HT_CAP_SGI_40;
573 }
574
575 /* set SM PS mode properly */
576 cap &= ~IEEE80211_HT_CAP_SM_PS;
577 switch (smps) {
578 case IEEE80211_SMPS_AUTOMATIC:
579 case IEEE80211_SMPS_NUM_MODES:
580 WARN_ON(1);
581 fallthrough;
582 case IEEE80211_SMPS_OFF:
583 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
584 IEEE80211_HT_CAP_SM_PS_SHIFT;
585 break;
586 case IEEE80211_SMPS_STATIC:
587 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
588 IEEE80211_HT_CAP_SM_PS_SHIFT;
589 break;
590 case IEEE80211_SMPS_DYNAMIC:
591 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
592 IEEE80211_HT_CAP_SM_PS_SHIFT;
593 break;
594 }
595
596 /* reserve and fill IE */
597 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
598 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
599 }
600
601 /* This function determines vht capability flags for the association
602 * and builds the IE.
603 * Note - the function returns true to own the MU-MIMO capability
604 */
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)605 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
606 struct sk_buff *skb,
607 struct ieee80211_supported_band *sband,
608 struct ieee80211_vht_cap *ap_vht_cap,
609 ieee80211_conn_flags_t conn_flags)
610 {
611 struct ieee80211_local *local = sdata->local;
612 u8 *pos;
613 u32 cap;
614 struct ieee80211_sta_vht_cap vht_cap;
615 u32 mask, ap_bf_sts, our_bf_sts;
616 bool mu_mimo_owner = false;
617
618 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
619
620 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
621 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
622
623 /* determine capability flags */
624 cap = vht_cap.cap;
625
626 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) {
627 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
628
629 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
630 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
631 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
632 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
633 }
634
635 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) {
636 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
637 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
638 }
639
640 /*
641 * Some APs apparently get confused if our capabilities are better
642 * than theirs, so restrict what we advertise in the assoc request.
643 */
644 if (!(ap_vht_cap->vht_cap_info &
645 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
646 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
647 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
648 else if (!(ap_vht_cap->vht_cap_info &
649 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
650 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
651
652 /*
653 * If some other vif is using the MU-MIMO capability we cannot associate
654 * using MU-MIMO - this will lead to contradictions in the group-id
655 * mechanism.
656 * Ownership is defined since association request, in order to avoid
657 * simultaneous associations with MU-MIMO.
658 */
659 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
660 bool disable_mu_mimo = false;
661 struct ieee80211_sub_if_data *other;
662
663 list_for_each_entry_rcu(other, &local->interfaces, list) {
664 if (other->vif.bss_conf.mu_mimo_owner) {
665 disable_mu_mimo = true;
666 break;
667 }
668 }
669 if (disable_mu_mimo)
670 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
671 else
672 mu_mimo_owner = true;
673 }
674
675 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
676
677 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
678 our_bf_sts = cap & mask;
679
680 if (ap_bf_sts < our_bf_sts) {
681 cap &= ~mask;
682 cap |= ap_bf_sts;
683 }
684
685 /* reserve and fill IE */
686 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
687 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
688
689 return mu_mimo_owner;
690 }
691
692 /* This function determines HE capability flags for the association
693 * and builds the IE.
694 */
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)695 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
696 struct sk_buff *skb,
697 struct ieee80211_supported_band *sband,
698 enum ieee80211_smps_mode smps_mode,
699 ieee80211_conn_flags_t conn_flags)
700 {
701 u8 *pos, *pre_he_pos;
702 const struct ieee80211_sta_he_cap *he_cap;
703 u8 he_cap_size;
704
705 he_cap = ieee80211_get_he_iftype_cap(sband,
706 ieee80211_vif_type_p2p(&sdata->vif));
707 if (WARN_ON(!he_cap))
708 return;
709
710 /* get a max size estimate */
711 he_cap_size =
712 2 + 1 + sizeof(he_cap->he_cap_elem) +
713 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
714 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
715 he_cap->he_cap_elem.phy_cap_info);
716 pos = skb_put(skb, he_cap_size);
717 pre_he_pos = pos;
718 pos = ieee80211_ie_build_he_cap(conn_flags,
719 pos, he_cap, pos + he_cap_size);
720 /* trim excess if any */
721 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
722
723 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb);
724 }
725
ieee80211_add_eht_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,struct ieee80211_supported_band * sband)726 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
727 struct sk_buff *skb,
728 struct ieee80211_supported_band *sband)
729 {
730 u8 *pos;
731 const struct ieee80211_sta_he_cap *he_cap;
732 const struct ieee80211_sta_eht_cap *eht_cap;
733 u8 eht_cap_size;
734
735 he_cap = ieee80211_get_he_iftype_cap(sband,
736 ieee80211_vif_type_p2p(&sdata->vif));
737 eht_cap = ieee80211_get_eht_iftype_cap(sband,
738 ieee80211_vif_type_p2p(&sdata->vif));
739
740 /*
741 * EHT capabilities element is only added if the HE capabilities element
742 * was added so assume that 'he_cap' is valid and don't check it.
743 */
744 if (WARN_ON(!he_cap || !eht_cap))
745 return;
746
747 eht_cap_size =
748 2 + 1 + sizeof(eht_cap->eht_cap_elem) +
749 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
750 &eht_cap->eht_cap_elem,
751 false) +
752 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
753 eht_cap->eht_cap_elem.phy_cap_info);
754 pos = skb_put(skb, eht_cap_size);
755 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size,
756 false);
757 }
758
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)759 static void ieee80211_assoc_add_rates(struct sk_buff *skb,
760 enum nl80211_chan_width width,
761 struct ieee80211_supported_band *sband,
762 struct ieee80211_mgd_assoc_data *assoc_data)
763 {
764 unsigned int shift = ieee80211_chanwidth_get_shift(width);
765 unsigned int rates_len, supp_rates_len;
766 u32 rates = 0;
767 int i, count;
768 u8 *pos;
769
770 if (assoc_data->supp_rates_len) {
771 /*
772 * Get all rates supported by the device and the AP as
773 * some APs don't like getting a superset of their rates
774 * in the association request (e.g. D-Link DAP 1353 in
775 * b-only mode)...
776 */
777 rates_len = ieee80211_parse_bitrates(width, sband,
778 assoc_data->supp_rates,
779 assoc_data->supp_rates_len,
780 &rates);
781 } else {
782 /*
783 * In case AP not provide any supported rates information
784 * before association, we send information element(s) with
785 * all rates that we support.
786 */
787 rates_len = sband->n_bitrates;
788 for (i = 0; i < sband->n_bitrates; i++)
789 rates |= BIT(i);
790 }
791
792 supp_rates_len = rates_len;
793 if (supp_rates_len > 8)
794 supp_rates_len = 8;
795
796 pos = skb_put(skb, supp_rates_len + 2);
797 *pos++ = WLAN_EID_SUPP_RATES;
798 *pos++ = supp_rates_len;
799
800 count = 0;
801 for (i = 0; i < sband->n_bitrates; i++) {
802 if (BIT(i) & rates) {
803 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
804 5 * (1 << shift));
805 *pos++ = (u8)rate;
806 if (++count == 8)
807 break;
808 }
809 }
810
811 if (rates_len > count) {
812 pos = skb_put(skb, rates_len - count + 2);
813 *pos++ = WLAN_EID_EXT_SUPP_RATES;
814 *pos++ = rates_len - count;
815
816 for (i++; i < sband->n_bitrates; i++) {
817 if (BIT(i) & rates) {
818 int rate;
819
820 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
821 5 * (1 << shift));
822 *pos++ = (u8)rate;
823 }
824 }
825 }
826 }
827
ieee80211_add_before_ht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)828 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
829 const u8 *elems,
830 size_t elems_len,
831 size_t offset)
832 {
833 size_t noffset;
834
835 static const u8 before_ht[] = {
836 WLAN_EID_SSID,
837 WLAN_EID_SUPP_RATES,
838 WLAN_EID_EXT_SUPP_RATES,
839 WLAN_EID_PWR_CAPABILITY,
840 WLAN_EID_SUPPORTED_CHANNELS,
841 WLAN_EID_RSN,
842 WLAN_EID_QOS_CAPA,
843 WLAN_EID_RRM_ENABLED_CAPABILITIES,
844 WLAN_EID_MOBILITY_DOMAIN,
845 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
846 WLAN_EID_RIC_DATA, /* reassoc only */
847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
848 };
849 static const u8 after_ric[] = {
850 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
851 WLAN_EID_HT_CAPABILITY,
852 WLAN_EID_BSS_COEX_2040,
853 /* luckily this is almost always there */
854 WLAN_EID_EXT_CAPABILITY,
855 WLAN_EID_QOS_TRAFFIC_CAPA,
856 WLAN_EID_TIM_BCAST_REQ,
857 WLAN_EID_INTERWORKING,
858 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
859 WLAN_EID_VHT_CAPABILITY,
860 WLAN_EID_OPMODE_NOTIF,
861 };
862
863 if (!elems_len)
864 return offset;
865
866 noffset = ieee80211_ie_split_ric(elems, elems_len,
867 before_ht,
868 ARRAY_SIZE(before_ht),
869 after_ric,
870 ARRAY_SIZE(after_ric),
871 offset);
872 skb_put_data(skb, elems + offset, noffset - offset);
873
874 return noffset;
875 }
876
ieee80211_add_before_vht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)877 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
878 const u8 *elems,
879 size_t elems_len,
880 size_t offset)
881 {
882 static const u8 before_vht[] = {
883 /*
884 * no need to list the ones split off before HT
885 * or generated here
886 */
887 WLAN_EID_BSS_COEX_2040,
888 WLAN_EID_EXT_CAPABILITY,
889 WLAN_EID_QOS_TRAFFIC_CAPA,
890 WLAN_EID_TIM_BCAST_REQ,
891 WLAN_EID_INTERWORKING,
892 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
893 };
894 size_t noffset;
895
896 if (!elems_len)
897 return offset;
898
899 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
900 noffset = ieee80211_ie_split(elems, elems_len,
901 before_vht, ARRAY_SIZE(before_vht),
902 offset);
903 skb_put_data(skb, elems + offset, noffset - offset);
904
905 return noffset;
906 }
907
ieee80211_add_before_he_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)908 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
909 const u8 *elems,
910 size_t elems_len,
911 size_t offset)
912 {
913 static const u8 before_he[] = {
914 /*
915 * no need to list the ones split off before VHT
916 * or generated here
917 */
918 WLAN_EID_OPMODE_NOTIF,
919 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
920 /* 11ai elements */
921 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
922 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
923 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
924 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
925 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
926 /* TODO: add 11ah/11aj/11ak elements */
927 };
928 size_t noffset;
929
930 if (!elems_len)
931 return offset;
932
933 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
934 noffset = ieee80211_ie_split(elems, elems_len,
935 before_he, ARRAY_SIZE(before_he),
936 offset);
937 skb_put_data(skb, elems + offset, noffset - offset);
938
939 return noffset;
940 }
941
942 #define PRESENT_ELEMS_MAX 8
943 #define PRESENT_ELEM_EXT_OFFS 0x100
944
945 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
946 struct sk_buff *skb, u16 capab,
947 const struct element *ext_capa,
948 const u16 *present_elems);
949
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)950 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
951 struct sk_buff *skb, u16 *capab,
952 const struct element *ext_capa,
953 const u8 *extra_elems,
954 size_t extra_elems_len,
955 unsigned int link_id,
956 struct ieee80211_link_data *link,
957 u16 *present_elems)
958 {
959 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
961 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
962 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
963 struct ieee80211_channel *chan = cbss->channel;
964 const struct ieee80211_sband_iftype_data *iftd;
965 struct ieee80211_local *local = sdata->local;
966 struct ieee80211_supported_band *sband;
967 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
968 struct ieee80211_chanctx_conf *chanctx_conf;
969 enum ieee80211_smps_mode smps_mode;
970 u16 orig_capab = *capab;
971 size_t offset = 0;
972 int present_elems_len = 0;
973 u8 *pos;
974 int i;
975
976 #define ADD_PRESENT_ELEM(id) do { \
977 /* need a last for termination - we use 0 == SSID */ \
978 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \
979 present_elems[present_elems_len++] = (id); \
980 } while (0)
981 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
982
983 if (link)
984 smps_mode = link->smps_mode;
985 else if (sdata->u.mgd.powersave)
986 smps_mode = IEEE80211_SMPS_DYNAMIC;
987 else
988 smps_mode = IEEE80211_SMPS_OFF;
989
990 if (link) {
991 /*
992 * 5/10 MHz scenarios are only viable without MLO, in which
993 * case this pointer should be used ... All of this is a bit
994 * unclear though, not sure this even works at all.
995 */
996 rcu_read_lock();
997 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
998 if (chanctx_conf)
999 width = chanctx_conf->def.width;
1000 rcu_read_unlock();
1001 }
1002
1003 sband = local->hw.wiphy->bands[chan->band];
1004 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1005
1006 if (sband->band == NL80211_BAND_2GHZ) {
1007 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1008 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
1009 }
1010
1011 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1012 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1013 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
1014
1015 if (sband->band != NL80211_BAND_S1GHZ)
1016 ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
1017
1018 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
1019 *capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1020 struct cfg80211_chan_def chandef = {
1021 .width = width,
1022 .chan = chan,
1023 };
1024
1025 pos = skb_put(skb, 4);
1026 *pos++ = WLAN_EID_PWR_CAPABILITY;
1027 *pos++ = 2;
1028 *pos++ = 0; /* min tx power */
1029 /* max tx power */
1030 *pos++ = ieee80211_chandef_max_power(&chandef);
1031 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1032 }
1033
1034 /*
1035 * Per spec, we shouldn't include the list of channels if we advertise
1036 * support for extended channel switching, but we've always done that;
1037 * (for now?) apply this restriction only on the (new) 6 GHz band.
1038 */
1039 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1040 (sband->band != NL80211_BAND_6GHZ ||
1041 !ext_capa || ext_capa->datalen < 1 ||
1042 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1043 /* TODO: get this in reg domain format */
1044 pos = skb_put(skb, 2 * sband->n_channels + 2);
1045 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1046 *pos++ = 2 * sband->n_channels;
1047 for (i = 0; i < sband->n_channels; i++) {
1048 int cf = sband->channels[i].center_freq;
1049
1050 *pos++ = ieee80211_frequency_to_channel(cf);
1051 *pos++ = 1; /* one channel in the subband*/
1052 }
1053 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1054 }
1055
1056 /* if present, add any custom IEs that go before HT */
1057 offset = ieee80211_add_before_ht_elems(skb, extra_elems,
1058 extra_elems_len,
1059 offset);
1060
1061 if (sband->band != NL80211_BAND_6GHZ &&
1062 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) {
1063 ieee80211_add_ht_ie(sdata, skb,
1064 assoc_data->link[link_id].ap_ht_param,
1065 sband, chan, smps_mode,
1066 assoc_data->link[link_id].conn_flags);
1067 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1068 }
1069
1070 /* if present, add any custom IEs that go before VHT */
1071 offset = ieee80211_add_before_vht_elems(skb, extra_elems,
1072 extra_elems_len,
1073 offset);
1074
1075 if (sband->band != NL80211_BAND_6GHZ &&
1076 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
1077 bool mu_mimo_owner =
1078 ieee80211_add_vht_ie(sdata, skb, sband,
1079 &assoc_data->link[link_id].ap_vht_cap,
1080 assoc_data->link[link_id].conn_flags);
1081
1082 if (link)
1083 link->conf->mu_mimo_owner = mu_mimo_owner;
1084 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1085 }
1086
1087 /*
1088 * If AP doesn't support HT, mark HE and EHT as disabled.
1089 * If on the 5GHz band, make sure it supports VHT.
1090 */
1091 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT ||
1092 (sband->band == NL80211_BAND_5GHZ &&
1093 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT))
1094 assoc_data->link[link_id].conn_flags |=
1095 IEEE80211_CONN_DISABLE_HE |
1096 IEEE80211_CONN_DISABLE_EHT;
1097
1098 /* if present, add any custom IEs that go before HE */
1099 offset = ieee80211_add_before_he_elems(skb, extra_elems,
1100 extra_elems_len,
1101 offset);
1102
1103 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) {
1104 ieee80211_add_he_ie(sdata, skb, sband, smps_mode,
1105 assoc_data->link[link_id].conn_flags);
1106 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1107 }
1108
1109 /*
1110 * careful - need to know about all the present elems before
1111 * calling ieee80211_assoc_add_ml_elem(), so add this one if
1112 * we're going to put it after the ML element
1113 */
1114 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1115 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1116
1117 if (link_id == assoc_data->assoc_link_id)
1118 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
1119 present_elems);
1120
1121 /* crash if somebody gets it wrong */
1122 present_elems = NULL;
1123
1124 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT))
1125 ieee80211_add_eht_ie(sdata, skb, sband);
1126
1127 if (sband->band == NL80211_BAND_S1GHZ) {
1128 ieee80211_add_aid_request_ie(sdata, skb);
1129 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1130 }
1131
1132 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1133 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1134
1135 if (link)
1136 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags;
1137
1138 return offset;
1139 }
1140
ieee80211_add_non_inheritance_elem(struct sk_buff * skb,const u16 * outer,const u16 * inner)1141 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1142 const u16 *outer,
1143 const u16 *inner)
1144 {
1145 unsigned int skb_len = skb->len;
1146 bool added = false;
1147 int i, j;
1148 u8 *len, *list_len = NULL;
1149
1150 skb_put_u8(skb, WLAN_EID_EXTENSION);
1151 len = skb_put(skb, 1);
1152 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1153
1154 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1155 u16 elem = outer[i];
1156 bool have_inner = false;
1157 bool at_extension = false;
1158
1159 /* should at least be sorted in the sense of normal -> ext */
1160 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1161
1162 /* switch to extension list */
1163 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1164 at_extension = true;
1165 if (!list_len)
1166 skb_put_u8(skb, 0);
1167 list_len = NULL;
1168 }
1169
1170 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1171 if (elem == inner[j]) {
1172 have_inner = true;
1173 break;
1174 }
1175 }
1176
1177 if (have_inner)
1178 continue;
1179
1180 if (!list_len) {
1181 list_len = skb_put(skb, 1);
1182 *list_len = 0;
1183 }
1184 *list_len += 1;
1185 skb_put_u8(skb, (u8)elem);
1186 }
1187
1188 if (!added)
1189 skb_trim(skb, skb_len);
1190 else
1191 *len = skb->len - skb_len - 2;
1192 }
1193
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)1194 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1195 struct sk_buff *skb, u16 capab,
1196 const struct element *ext_capa,
1197 const u16 *outer_present_elems)
1198 {
1199 struct ieee80211_local *local = sdata->local;
1200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1201 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1202 struct ieee80211_multi_link_elem *ml_elem;
1203 struct ieee80211_mle_basic_common_info *common;
1204 const struct wiphy_iftype_ext_capab *ift_ext_capa;
1205 __le16 eml_capa = 0, mld_capa_ops = 0;
1206 unsigned int link_id;
1207 u8 *ml_elem_len;
1208 void *capab_pos;
1209
1210 if (!sdata->vif.valid_links)
1211 return;
1212
1213 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1214 ieee80211_vif_type_p2p(&sdata->vif));
1215 if (ift_ext_capa) {
1216 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1217 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1218 }
1219
1220 skb_put_u8(skb, WLAN_EID_EXTENSION);
1221 ml_elem_len = skb_put(skb, 1);
1222 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1223 ml_elem = skb_put(skb, sizeof(*ml_elem));
1224 ml_elem->control =
1225 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1226 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1227 common = skb_put(skb, sizeof(*common));
1228 common->len = sizeof(*common) +
1229 2; /* MLD capa/ops */
1230 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1231
1232 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1233 if (eml_capa &
1234 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1235 IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1236 common->len += 2; /* EML capabilities */
1237 ml_elem->control |=
1238 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1239 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1240 }
1241 /* need indication from userspace to support this */
1242 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP);
1243 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1244
1245 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1246 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1247 const u8 *extra_elems;
1248 size_t extra_elems_len;
1249 size_t extra_used;
1250 u8 *subelem_len = NULL;
1251 __le16 ctrl;
1252
1253 if (!assoc_data->link[link_id].bss ||
1254 link_id == assoc_data->assoc_link_id)
1255 continue;
1256
1257 extra_elems = assoc_data->link[link_id].elems;
1258 extra_elems_len = assoc_data->link[link_id].elems_len;
1259
1260 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1261 subelem_len = skb_put(skb, 1);
1262
1263 ctrl = cpu_to_le16(link_id |
1264 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1265 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1266 skb_put_data(skb, &ctrl, sizeof(ctrl));
1267 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1268 skb_put_data(skb, assoc_data->link[link_id].addr,
1269 ETH_ALEN);
1270 /*
1271 * Now add the contents of the (re)association request,
1272 * but the "listen interval" and "current AP address"
1273 * (if applicable) are skipped. So we only have
1274 * the capability field (remember the position and fill
1275 * later), followed by the elements added below by
1276 * calling ieee80211_assoc_link_elems().
1277 */
1278 capab_pos = skb_put(skb, 2);
1279
1280 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1281 ext_capa,
1282 extra_elems,
1283 extra_elems_len,
1284 link_id, NULL,
1285 link_present_elems);
1286 if (extra_elems)
1287 skb_put_data(skb, extra_elems + extra_used,
1288 extra_elems_len - extra_used);
1289
1290 put_unaligned_le16(capab, capab_pos);
1291
1292 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1293 link_present_elems);
1294
1295 ieee80211_fragment_element(skb, subelem_len);
1296 }
1297
1298 ieee80211_fragment_element(skb, ml_elem_len);
1299 }
1300
ieee80211_send_assoc(struct ieee80211_sub_if_data * sdata)1301 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1302 {
1303 struct ieee80211_local *local = sdata->local;
1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1305 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1306 struct ieee80211_link_data *link;
1307 struct sk_buff *skb;
1308 struct ieee80211_mgmt *mgmt;
1309 u8 *pos, qos_info, *ie_start;
1310 size_t offset, noffset;
1311 u16 capab = WLAN_CAPABILITY_ESS, link_capab;
1312 __le16 listen_int;
1313 struct element *ext_capa = NULL;
1314 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1315 struct ieee80211_prep_tx_info info = {};
1316 unsigned int link_id, n_links = 0;
1317 u16 present_elems[PRESENT_ELEMS_MAX] = {};
1318 void *capab_pos;
1319 size_t size;
1320 int ret;
1321
1322 /* we know it's writable, cast away the const */
1323 if (assoc_data->ie_len)
1324 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1325 assoc_data->ie,
1326 assoc_data->ie_len);
1327
1328 sdata_assert_lock(sdata);
1329
1330 size = local->hw.extra_tx_headroom +
1331 sizeof(*mgmt) + /* bit too much but doesn't matter */
1332 2 + assoc_data->ssid_len + /* SSID */
1333 assoc_data->ie_len + /* extra IEs */
1334 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1335 9; /* WMM */
1336
1337 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1338 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1339 const struct ieee80211_sband_iftype_data *iftd;
1340 struct ieee80211_supported_band *sband;
1341
1342 if (!cbss)
1343 continue;
1344
1345 sband = local->hw.wiphy->bands[cbss->channel->band];
1346
1347 n_links++;
1348 /* add STA profile elements length */
1349 size += assoc_data->link[link_id].elems_len;
1350 /* and supported rates length */
1351 size += 4 + sband->n_bitrates;
1352 /* supported channels */
1353 size += 2 + 2 * sband->n_channels;
1354
1355 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1356 if (iftd)
1357 size += iftd->vendor_elems.len;
1358
1359 /* power capability */
1360 size += 4;
1361
1362 /* HT, VHT, HE, EHT */
1363 size += 2 + sizeof(struct ieee80211_ht_cap);
1364 size += 2 + sizeof(struct ieee80211_vht_cap);
1365 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1366 sizeof(struct ieee80211_he_mcs_nss_supp) +
1367 IEEE80211_HE_PPE_THRES_MAX_LEN;
1368
1369 if (sband->band == NL80211_BAND_6GHZ)
1370 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1371
1372 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1373 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1374 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1375
1376 /* non-inheritance element */
1377 size += 2 + 2 + PRESENT_ELEMS_MAX;
1378
1379 /* should be the same across all BSSes */
1380 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1381 capab |= WLAN_CAPABILITY_PRIVACY;
1382 }
1383
1384 if (sdata->vif.valid_links) {
1385 /* consider the multi-link element with STA profile */
1386 size += sizeof(struct ieee80211_multi_link_elem);
1387 /* max common info field in basic multi-link element */
1388 size += sizeof(struct ieee80211_mle_basic_common_info) +
1389 2 + /* capa & op */
1390 2; /* EML capa */
1391
1392 /*
1393 * The capability elements were already considered above;
1394 * note this over-estimates a bit because there's no
1395 * STA profile for the assoc link.
1396 */
1397 size += (n_links - 1) *
1398 (1 + 1 + /* subelement ID/length */
1399 2 + /* STA control */
1400 1 + ETH_ALEN + 2 /* STA Info field */);
1401 }
1402
1403 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1404 if (WARN_ON(!link))
1405 return -EINVAL;
1406
1407 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1408 return -EINVAL;
1409
1410 skb = alloc_skb(size, GFP_KERNEL);
1411 if (!skb)
1412 return -ENOMEM;
1413
1414 skb_reserve(skb, local->hw.extra_tx_headroom);
1415
1416 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1417 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1418
1419 /* Set MBSSID support for HE AP if needed */
1420 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1421 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
1422 ext_capa && ext_capa->datalen >= 3)
1423 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1424
1425 mgmt = skb_put_zero(skb, 24);
1426 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1427 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1428 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1429
1430 listen_int = cpu_to_le16(assoc_data->s1g ?
1431 ieee80211_encode_usf(local->hw.conf.listen_interval) :
1432 local->hw.conf.listen_interval);
1433 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1434 skb_put(skb, 10);
1435 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1436 IEEE80211_STYPE_REASSOC_REQ);
1437 capab_pos = &mgmt->u.reassoc_req.capab_info;
1438 mgmt->u.reassoc_req.listen_interval = listen_int;
1439 memcpy(mgmt->u.reassoc_req.current_ap,
1440 assoc_data->prev_ap_addr, ETH_ALEN);
1441 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1442 } else {
1443 skb_put(skb, 4);
1444 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1445 IEEE80211_STYPE_ASSOC_REQ);
1446 capab_pos = &mgmt->u.assoc_req.capab_info;
1447 mgmt->u.assoc_req.listen_interval = listen_int;
1448 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1449 }
1450
1451 /* SSID */
1452 pos = skb_put(skb, 2 + assoc_data->ssid_len);
1453 ie_start = pos;
1454 *pos++ = WLAN_EID_SSID;
1455 *pos++ = assoc_data->ssid_len;
1456 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1457
1458 /* add the elements for the assoc (main) link */
1459 link_capab = capab;
1460 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1461 ext_capa,
1462 assoc_data->ie,
1463 assoc_data->ie_len,
1464 assoc_data->assoc_link_id, link,
1465 present_elems);
1466 put_unaligned_le16(link_capab, capab_pos);
1467
1468 /* if present, add any custom non-vendor IEs */
1469 if (assoc_data->ie_len) {
1470 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1471 assoc_data->ie_len,
1472 offset);
1473 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1474 offset = noffset;
1475 }
1476
1477 if (assoc_data->wmm) {
1478 if (assoc_data->uapsd) {
1479 qos_info = ifmgd->uapsd_queues;
1480 qos_info |= (ifmgd->uapsd_max_sp_len <<
1481 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1482 } else {
1483 qos_info = 0;
1484 }
1485
1486 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1487 }
1488
1489 /* add any remaining custom (i.e. vendor specific here) IEs */
1490 if (assoc_data->ie_len) {
1491 noffset = assoc_data->ie_len;
1492 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1493 }
1494
1495 if (assoc_data->fils_kek_len) {
1496 ret = fils_encrypt_assoc_req(skb, assoc_data);
1497 if (ret < 0) {
1498 dev_kfree_skb(skb);
1499 return ret;
1500 }
1501 }
1502
1503 pos = skb_tail_pointer(skb);
1504 kfree(ifmgd->assoc_req_ies);
1505 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1506 if (!ifmgd->assoc_req_ies) {
1507 dev_kfree_skb(skb);
1508 return -ENOMEM;
1509 }
1510
1511 ifmgd->assoc_req_ies_len = pos - ie_start;
1512
1513 drv_mgd_prepare_tx(local, sdata, &info);
1514
1515 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1516 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1517 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1518 IEEE80211_TX_INTFL_MLME_CONN_TX;
1519 ieee80211_tx_skb(sdata, skb);
1520
1521 return 0;
1522 }
1523
ieee80211_send_pspoll(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1524 void ieee80211_send_pspoll(struct ieee80211_local *local,
1525 struct ieee80211_sub_if_data *sdata)
1526 {
1527 struct ieee80211_pspoll *pspoll;
1528 struct sk_buff *skb;
1529
1530 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
1531 if (!skb)
1532 return;
1533
1534 pspoll = (struct ieee80211_pspoll *) skb->data;
1535 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1536
1537 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1538 ieee80211_tx_skb(sdata, skb);
1539 }
1540
ieee80211_send_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool powersave)1541 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1542 struct ieee80211_sub_if_data *sdata,
1543 bool powersave)
1544 {
1545 struct sk_buff *skb;
1546 struct ieee80211_hdr_3addr *nullfunc;
1547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1548
1549 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
1550 !ieee80211_hw_check(&local->hw,
1551 DOESNT_SUPPORT_QOS_NDP));
1552 if (!skb)
1553 return;
1554
1555 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
1556 if (powersave)
1557 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1558
1559 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1560 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
1561
1562 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1563 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
1564
1565 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
1566 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1567
1568 ieee80211_tx_skb(sdata, skb);
1569 }
1570
ieee80211_send_4addr_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1571 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
1572 struct ieee80211_sub_if_data *sdata)
1573 {
1574 struct sk_buff *skb;
1575 struct ieee80211_hdr *nullfunc;
1576 __le16 fc;
1577
1578 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1579 return;
1580
1581 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
1582 if (!skb)
1583 return;
1584
1585 skb_reserve(skb, local->hw.extra_tx_headroom);
1586
1587 nullfunc = skb_put_zero(skb, 30);
1588 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
1589 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1590 nullfunc->frame_control = fc;
1591 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1592 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1593 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
1594 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
1595
1596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1597 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
1598 ieee80211_tx_skb(sdata, skb);
1599 }
1600
1601 /* spectrum management related things */
ieee80211_chswitch_work(struct work_struct * work)1602 static void ieee80211_chswitch_work(struct work_struct *work)
1603 {
1604 struct ieee80211_link_data *link =
1605 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work);
1606 struct ieee80211_sub_if_data *sdata = link->sdata;
1607 struct ieee80211_local *local = sdata->local;
1608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1609 int ret;
1610
1611 if (!ieee80211_sdata_running(sdata))
1612 return;
1613
1614 sdata_lock(sdata);
1615 mutex_lock(&local->mtx);
1616 mutex_lock(&local->chanctx_mtx);
1617
1618 if (!ifmgd->associated)
1619 goto out;
1620
1621 if (!link->conf->csa_active)
1622 goto out;
1623
1624 /*
1625 * using reservation isn't immediate as it may be deferred until later
1626 * with multi-vif. once reservation is complete it will re-schedule the
1627 * work with no reserved_chanctx so verify chandef to check if it
1628 * completed successfully
1629 */
1630
1631 if (link->reserved_chanctx) {
1632 /*
1633 * with multi-vif csa driver may call ieee80211_csa_finish()
1634 * many times while waiting for other interfaces to use their
1635 * reservations
1636 */
1637 if (link->reserved_ready)
1638 goto out;
1639
1640 ret = ieee80211_link_use_reserved_context(link);
1641 if (ret) {
1642 sdata_info(sdata,
1643 "failed to use reserved channel context, disconnecting (err=%d)\n",
1644 ret);
1645 ieee80211_queue_work(&sdata->local->hw,
1646 &ifmgd->csa_connection_drop_work);
1647 goto out;
1648 }
1649
1650 goto out;
1651 }
1652
1653 if (!cfg80211_chandef_identical(&link->conf->chandef,
1654 &link->csa_chandef)) {
1655 sdata_info(sdata,
1656 "failed to finalize channel switch, disconnecting\n");
1657 ieee80211_queue_work(&sdata->local->hw,
1658 &ifmgd->csa_connection_drop_work);
1659 goto out;
1660 }
1661
1662 link->u.mgd.csa_waiting_bcn = true;
1663
1664 ieee80211_sta_reset_beacon_monitor(sdata);
1665 ieee80211_sta_reset_conn_monitor(sdata);
1666
1667 out:
1668 mutex_unlock(&local->chanctx_mtx);
1669 mutex_unlock(&local->mtx);
1670 sdata_unlock(sdata);
1671 }
1672
ieee80211_chswitch_post_beacon(struct ieee80211_link_data * link)1673 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
1674 {
1675 struct ieee80211_sub_if_data *sdata = link->sdata;
1676 struct ieee80211_local *local = sdata->local;
1677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1678 int ret;
1679
1680 sdata_assert_lock(sdata);
1681
1682 WARN_ON(!link->conf->csa_active);
1683
1684 if (link->csa_block_tx) {
1685 ieee80211_wake_vif_queues(local, sdata,
1686 IEEE80211_QUEUE_STOP_REASON_CSA);
1687 link->csa_block_tx = false;
1688 }
1689
1690 link->conf->csa_active = false;
1691 link->u.mgd.csa_waiting_bcn = false;
1692 /*
1693 * If the CSA IE is still present on the beacon after the switch,
1694 * we need to consider it as a new CSA (possibly to self).
1695 */
1696 link->u.mgd.beacon_crc_valid = false;
1697
1698 ret = drv_post_channel_switch(sdata);
1699 if (ret) {
1700 sdata_info(sdata,
1701 "driver post channel switch failed, disconnecting\n");
1702 ieee80211_queue_work(&local->hw,
1703 &ifmgd->csa_connection_drop_work);
1704 return;
1705 }
1706
1707 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0);
1708 }
1709
ieee80211_chswitch_done(struct ieee80211_vif * vif,bool success)1710 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1711 {
1712 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1714
1715 if (WARN_ON(sdata->vif.valid_links))
1716 success = false;
1717
1718 trace_api_chswitch_done(sdata, success);
1719 if (!success) {
1720 sdata_info(sdata,
1721 "driver channel switch failed, disconnecting\n");
1722 ieee80211_queue_work(&sdata->local->hw,
1723 &ifmgd->csa_connection_drop_work);
1724 } else {
1725 ieee80211_queue_work(&sdata->local->hw,
1726 &sdata->deflink.u.mgd.chswitch_work);
1727 }
1728 }
1729 EXPORT_SYMBOL(ieee80211_chswitch_done);
1730
ieee80211_chswitch_timer(struct timer_list * t)1731 static void ieee80211_chswitch_timer(struct timer_list *t)
1732 {
1733 struct ieee80211_link_data *link =
1734 from_timer(link, t, u.mgd.chswitch_timer);
1735
1736 ieee80211_queue_work(&link->sdata->local->hw,
1737 &link->u.mgd.chswitch_work);
1738 }
1739
1740 static void
ieee80211_sta_abort_chanswitch(struct ieee80211_link_data * link)1741 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
1742 {
1743 struct ieee80211_sub_if_data *sdata = link->sdata;
1744 struct ieee80211_local *local = sdata->local;
1745
1746 if (!local->ops->abort_channel_switch)
1747 return;
1748
1749 mutex_lock(&local->mtx);
1750
1751 mutex_lock(&local->chanctx_mtx);
1752 ieee80211_link_unreserve_chanctx(link);
1753 mutex_unlock(&local->chanctx_mtx);
1754
1755 if (link->csa_block_tx)
1756 ieee80211_wake_vif_queues(local, sdata,
1757 IEEE80211_QUEUE_STOP_REASON_CSA);
1758
1759 link->csa_block_tx = false;
1760 link->conf->csa_active = false;
1761
1762 mutex_unlock(&local->mtx);
1763
1764 drv_abort_channel_switch(sdata);
1765 }
1766
1767 static void
ieee80211_sta_process_chanswitch(struct ieee80211_link_data * link,u64 timestamp,u32 device_timestamp,struct ieee802_11_elems * elems,bool beacon)1768 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
1769 u64 timestamp, u32 device_timestamp,
1770 struct ieee802_11_elems *elems,
1771 bool beacon)
1772 {
1773 struct ieee80211_sub_if_data *sdata = link->sdata;
1774 struct ieee80211_local *local = sdata->local;
1775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1776 struct cfg80211_bss *cbss = link->u.mgd.bss;
1777 struct ieee80211_chanctx_conf *conf;
1778 struct ieee80211_chanctx *chanctx;
1779 enum nl80211_band current_band;
1780 struct ieee80211_csa_ie csa_ie;
1781 struct ieee80211_channel_switch ch_switch;
1782 struct ieee80211_bss *bss;
1783 int res;
1784
1785 sdata_assert_lock(sdata);
1786
1787 if (!cbss)
1788 return;
1789
1790 if (local->scanning)
1791 return;
1792
1793 current_band = cbss->channel->band;
1794 bss = (void *)cbss->priv;
1795 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
1796 bss->vht_cap_info,
1797 link->u.mgd.conn_flags,
1798 link->u.mgd.bssid, &csa_ie);
1799
1800 if (!res) {
1801 ch_switch.timestamp = timestamp;
1802 ch_switch.device_timestamp = device_timestamp;
1803 ch_switch.block_tx = csa_ie.mode;
1804 ch_switch.chandef = csa_ie.chandef;
1805 ch_switch.count = csa_ie.count;
1806 ch_switch.delay = csa_ie.max_switch_time;
1807 }
1808
1809 if (res < 0)
1810 goto lock_and_drop_connection;
1811
1812 if (beacon && link->conf->csa_active &&
1813 !link->u.mgd.csa_waiting_bcn) {
1814 if (res)
1815 ieee80211_sta_abort_chanswitch(link);
1816 else
1817 drv_channel_switch_rx_beacon(sdata, &ch_switch);
1818 return;
1819 } else if (link->conf->csa_active || res) {
1820 /* disregard subsequent announcements if already processing */
1821 return;
1822 }
1823
1824 if (link->conf->chandef.chan->band !=
1825 csa_ie.chandef.chan->band) {
1826 sdata_info(sdata,
1827 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1828 link->u.mgd.bssid,
1829 csa_ie.chandef.chan->center_freq,
1830 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1831 csa_ie.chandef.center_freq2);
1832 goto lock_and_drop_connection;
1833 }
1834
1835 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
1836 IEEE80211_CHAN_DISABLED)) {
1837 sdata_info(sdata,
1838 "AP %pM switches to unsupported channel "
1839 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), "
1840 "disconnecting\n",
1841 link->u.mgd.bssid,
1842 csa_ie.chandef.chan->center_freq,
1843 csa_ie.chandef.chan->freq_offset,
1844 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1845 csa_ie.chandef.freq1_offset,
1846 csa_ie.chandef.center_freq2);
1847 goto lock_and_drop_connection;
1848 }
1849
1850 if (cfg80211_chandef_identical(&csa_ie.chandef,
1851 &link->conf->chandef) &&
1852 (!csa_ie.mode || !beacon)) {
1853 if (link->u.mgd.csa_ignored_same_chan)
1854 return;
1855 sdata_info(sdata,
1856 "AP %pM tries to chanswitch to same channel, ignore\n",
1857 link->u.mgd.bssid);
1858 link->u.mgd.csa_ignored_same_chan = true;
1859 return;
1860 }
1861
1862 /*
1863 * Drop all TDLS peers - either we disconnect or move to a different
1864 * channel from this point on. There's no telling what our peer will do.
1865 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1866 * have an incompatible wider chandef.
1867 */
1868 ieee80211_teardown_tdls_peers(sdata);
1869
1870 mutex_lock(&local->mtx);
1871 mutex_lock(&local->chanctx_mtx);
1872 conf = rcu_dereference_protected(link->conf->chanctx_conf,
1873 lockdep_is_held(&local->chanctx_mtx));
1874 if (!conf) {
1875 sdata_info(sdata,
1876 "no channel context assigned to vif?, disconnecting\n");
1877 goto drop_connection;
1878 }
1879
1880 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1881
1882 if (local->use_chanctx &&
1883 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
1884 sdata_info(sdata,
1885 "driver doesn't support chan-switch with channel contexts\n");
1886 goto drop_connection;
1887 }
1888
1889 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1890 sdata_info(sdata,
1891 "preparing for channel switch failed, disconnecting\n");
1892 goto drop_connection;
1893 }
1894
1895 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef,
1896 chanctx->mode, false);
1897 if (res) {
1898 sdata_info(sdata,
1899 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1900 res);
1901 goto drop_connection;
1902 }
1903 mutex_unlock(&local->chanctx_mtx);
1904
1905 link->conf->csa_active = true;
1906 link->csa_chandef = csa_ie.chandef;
1907 link->csa_block_tx = csa_ie.mode;
1908 link->u.mgd.csa_ignored_same_chan = false;
1909 link->u.mgd.beacon_crc_valid = false;
1910
1911 if (link->csa_block_tx)
1912 ieee80211_stop_vif_queues(local, sdata,
1913 IEEE80211_QUEUE_STOP_REASON_CSA);
1914 mutex_unlock(&local->mtx);
1915
1916 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0,
1917 csa_ie.count, csa_ie.mode);
1918
1919 if (local->ops->channel_switch) {
1920 /* use driver's channel switch callback */
1921 drv_channel_switch(local, sdata, &ch_switch);
1922 return;
1923 }
1924
1925 /* channel switch handled in software */
1926 if (csa_ie.count <= 1)
1927 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work);
1928 else
1929 mod_timer(&link->u.mgd.chswitch_timer,
1930 TU_TO_EXP_TIME((csa_ie.count - 1) *
1931 cbss->beacon_interval));
1932 return;
1933 lock_and_drop_connection:
1934 mutex_lock(&local->mtx);
1935 mutex_lock(&local->chanctx_mtx);
1936 drop_connection:
1937 /*
1938 * This is just so that the disconnect flow will know that
1939 * we were trying to switch channel and failed. In case the
1940 * mode is 1 (we are not allowed to Tx), we will know not to
1941 * send a deauthentication frame. Those two fields will be
1942 * reset when the disconnection worker runs.
1943 */
1944 link->conf->csa_active = true;
1945 link->csa_block_tx = csa_ie.mode;
1946
1947 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1948 mutex_unlock(&local->chanctx_mtx);
1949 mutex_unlock(&local->mtx);
1950 }
1951
1952 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)1953 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1954 struct ieee80211_channel *channel,
1955 const u8 *country_ie, u8 country_ie_len,
1956 const u8 *pwr_constr_elem,
1957 int *chan_pwr, int *pwr_reduction)
1958 {
1959 struct ieee80211_country_ie_triplet *triplet;
1960 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1961 int i, chan_increment;
1962 bool have_chan_pwr = false;
1963
1964 /* Invalid IE */
1965 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1966 return false;
1967
1968 triplet = (void *)(country_ie + 3);
1969 country_ie_len -= 3;
1970
1971 switch (channel->band) {
1972 default:
1973 WARN_ON_ONCE(1);
1974 fallthrough;
1975 case NL80211_BAND_2GHZ:
1976 case NL80211_BAND_60GHZ:
1977 case NL80211_BAND_LC:
1978 chan_increment = 1;
1979 break;
1980 case NL80211_BAND_5GHZ:
1981 chan_increment = 4;
1982 break;
1983 case NL80211_BAND_6GHZ:
1984 /*
1985 * In the 6 GHz band, the "maximum transmit power level"
1986 * field in the triplets is reserved, and thus will be
1987 * zero and we shouldn't use it to control TX power.
1988 * The actual TX power will be given in the transmit
1989 * power envelope element instead.
1990 */
1991 return false;
1992 }
1993
1994 /* find channel */
1995 while (country_ie_len >= 3) {
1996 u8 first_channel = triplet->chans.first_channel;
1997
1998 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1999 goto next;
2000
2001 for (i = 0; i < triplet->chans.num_channels; i++) {
2002 if (first_channel + i * chan_increment == chan) {
2003 have_chan_pwr = true;
2004 *chan_pwr = triplet->chans.max_power;
2005 break;
2006 }
2007 }
2008 if (have_chan_pwr)
2009 break;
2010
2011 next:
2012 triplet++;
2013 country_ie_len -= 3;
2014 }
2015
2016 if (have_chan_pwr && pwr_constr_elem)
2017 *pwr_reduction = *pwr_constr_elem;
2018 else
2019 *pwr_reduction = 0;
2020
2021 return have_chan_pwr;
2022 }
2023
ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * cisco_dtpc_ie,int * pwr_level)2024 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2025 struct ieee80211_channel *channel,
2026 const u8 *cisco_dtpc_ie,
2027 int *pwr_level)
2028 {
2029 /* From practical testing, the first data byte of the DTPC element
2030 * seems to contain the requested dBm level, and the CLI on Cisco
2031 * APs clearly state the range is -127 to 127 dBm, which indicates
2032 * a signed byte, although it seemingly never actually goes negative.
2033 * The other byte seems to always be zero.
2034 */
2035 *pwr_level = (__s8)cisco_dtpc_ie[4];
2036 }
2037
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)2038 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2039 struct ieee80211_channel *channel,
2040 struct ieee80211_mgmt *mgmt,
2041 const u8 *country_ie, u8 country_ie_len,
2042 const u8 *pwr_constr_ie,
2043 const u8 *cisco_dtpc_ie)
2044 {
2045 struct ieee80211_sub_if_data *sdata = link->sdata;
2046 bool has_80211h_pwr = false, has_cisco_pwr = false;
2047 int chan_pwr = 0, pwr_reduction_80211h = 0;
2048 int pwr_level_cisco, pwr_level_80211h;
2049 int new_ap_level;
2050 __le16 capab = mgmt->u.probe_resp.capab_info;
2051
2052 if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2053 return 0; /* TODO */
2054
2055 if (country_ie &&
2056 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2057 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2058 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2059 sdata, channel, country_ie, country_ie_len,
2060 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2061 pwr_level_80211h =
2062 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2063 }
2064
2065 if (cisco_dtpc_ie) {
2066 ieee80211_find_cisco_dtpc(
2067 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2068 has_cisco_pwr = true;
2069 }
2070
2071 if (!has_80211h_pwr && !has_cisco_pwr)
2072 return 0;
2073
2074 /* If we have both 802.11h and Cisco DTPC, apply both limits
2075 * by picking the smallest of the two power levels advertised.
2076 */
2077 if (has_80211h_pwr &&
2078 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2079 new_ap_level = pwr_level_80211h;
2080
2081 if (link->ap_power_level == new_ap_level)
2082 return 0;
2083
2084 sdata_dbg(sdata,
2085 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2086 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2087 link->u.mgd.bssid);
2088 } else { /* has_cisco_pwr is always true here. */
2089 new_ap_level = pwr_level_cisco;
2090
2091 if (link->ap_power_level == new_ap_level)
2092 return 0;
2093
2094 sdata_dbg(sdata,
2095 "Limiting TX power to %d dBm as advertised by %pM\n",
2096 pwr_level_cisco, link->u.mgd.bssid);
2097 }
2098
2099 link->ap_power_level = new_ap_level;
2100 if (__ieee80211_recalc_txpower(sdata))
2101 return BSS_CHANGED_TXPOWER;
2102 return 0;
2103 }
2104
2105 /* powersave */
ieee80211_enable_ps(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)2106 static void ieee80211_enable_ps(struct ieee80211_local *local,
2107 struct ieee80211_sub_if_data *sdata)
2108 {
2109 struct ieee80211_conf *conf = &local->hw.conf;
2110
2111 /*
2112 * If we are scanning right now then the parameters will
2113 * take effect when scan finishes.
2114 */
2115 if (local->scanning)
2116 return;
2117
2118 if (conf->dynamic_ps_timeout > 0 &&
2119 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2120 mod_timer(&local->dynamic_ps_timer, jiffies +
2121 msecs_to_jiffies(conf->dynamic_ps_timeout));
2122 } else {
2123 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2124 ieee80211_send_nullfunc(local, sdata, true);
2125
2126 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2127 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2128 return;
2129
2130 conf->flags |= IEEE80211_CONF_PS;
2131 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2132 }
2133 }
2134
ieee80211_change_ps(struct ieee80211_local * local)2135 static void ieee80211_change_ps(struct ieee80211_local *local)
2136 {
2137 struct ieee80211_conf *conf = &local->hw.conf;
2138
2139 if (local->ps_sdata) {
2140 ieee80211_enable_ps(local, local->ps_sdata);
2141 } else if (conf->flags & IEEE80211_CONF_PS) {
2142 conf->flags &= ~IEEE80211_CONF_PS;
2143 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2144 del_timer_sync(&local->dynamic_ps_timer);
2145 cancel_work_sync(&local->dynamic_ps_enable_work);
2146 }
2147 }
2148
ieee80211_powersave_allowed(struct ieee80211_sub_if_data * sdata)2149 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2150 {
2151 struct ieee80211_local *local = sdata->local;
2152 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2153 struct sta_info *sta = NULL;
2154 bool authorized = false;
2155
2156 if (!mgd->powersave)
2157 return false;
2158
2159 if (mgd->broken_ap)
2160 return false;
2161
2162 if (!mgd->associated)
2163 return false;
2164
2165 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2166 return false;
2167
2168 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2169 !sdata->deflink.u.mgd.have_beacon)
2170 return false;
2171
2172 rcu_read_lock();
2173 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2174 if (sta)
2175 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2176 rcu_read_unlock();
2177
2178 return authorized;
2179 }
2180
2181 /* need to hold RTNL or interface lock */
ieee80211_recalc_ps(struct ieee80211_local * local)2182 void ieee80211_recalc_ps(struct ieee80211_local *local)
2183 {
2184 struct ieee80211_sub_if_data *sdata, *found = NULL;
2185 int count = 0;
2186 int timeout;
2187
2188 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2189 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2190 local->ps_sdata = NULL;
2191 return;
2192 }
2193
2194 list_for_each_entry(sdata, &local->interfaces, list) {
2195 if (!ieee80211_sdata_running(sdata))
2196 continue;
2197 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2198 /* If an AP vif is found, then disable PS
2199 * by setting the count to zero thereby setting
2200 * ps_sdata to NULL.
2201 */
2202 count = 0;
2203 break;
2204 }
2205 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2206 continue;
2207 found = sdata;
2208 count++;
2209 }
2210
2211 if (count == 1 && ieee80211_powersave_allowed(found)) {
2212 u8 dtimper = found->deflink.u.mgd.dtim_period;
2213
2214 timeout = local->dynamic_ps_forced_timeout;
2215 if (timeout < 0)
2216 timeout = 100;
2217 local->hw.conf.dynamic_ps_timeout = timeout;
2218
2219 /* If the TIM IE is invalid, pretend the value is 1 */
2220 if (!dtimper)
2221 dtimper = 1;
2222
2223 local->hw.conf.ps_dtim_period = dtimper;
2224 local->ps_sdata = found;
2225 } else {
2226 local->ps_sdata = NULL;
2227 }
2228
2229 ieee80211_change_ps(local);
2230 }
2231
ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data * sdata)2232 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2233 {
2234 bool ps_allowed = ieee80211_powersave_allowed(sdata);
2235
2236 if (sdata->vif.cfg.ps != ps_allowed) {
2237 sdata->vif.cfg.ps = ps_allowed;
2238 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2239 }
2240 }
2241
ieee80211_dynamic_ps_disable_work(struct work_struct * work)2242 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2243 {
2244 struct ieee80211_local *local =
2245 container_of(work, struct ieee80211_local,
2246 dynamic_ps_disable_work);
2247
2248 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2249 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2250 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2251 }
2252
2253 ieee80211_wake_queues_by_reason(&local->hw,
2254 IEEE80211_MAX_QUEUE_MAP,
2255 IEEE80211_QUEUE_STOP_REASON_PS,
2256 false);
2257 }
2258
ieee80211_dynamic_ps_enable_work(struct work_struct * work)2259 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2260 {
2261 struct ieee80211_local *local =
2262 container_of(work, struct ieee80211_local,
2263 dynamic_ps_enable_work);
2264 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2265 struct ieee80211_if_managed *ifmgd;
2266 unsigned long flags;
2267 int q;
2268
2269 /* can only happen when PS was just disabled anyway */
2270 if (!sdata)
2271 return;
2272
2273 ifmgd = &sdata->u.mgd;
2274
2275 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2276 return;
2277
2278 if (local->hw.conf.dynamic_ps_timeout > 0) {
2279 /* don't enter PS if TX frames are pending */
2280 if (drv_tx_frames_pending(local)) {
2281 mod_timer(&local->dynamic_ps_timer, jiffies +
2282 msecs_to_jiffies(
2283 local->hw.conf.dynamic_ps_timeout));
2284 return;
2285 }
2286
2287 /*
2288 * transmission can be stopped by others which leads to
2289 * dynamic_ps_timer expiry. Postpone the ps timer if it
2290 * is not the actual idle state.
2291 */
2292 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2293 for (q = 0; q < local->hw.queues; q++) {
2294 if (local->queue_stop_reasons[q]) {
2295 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2296 flags);
2297 mod_timer(&local->dynamic_ps_timer, jiffies +
2298 msecs_to_jiffies(
2299 local->hw.conf.dynamic_ps_timeout));
2300 return;
2301 }
2302 }
2303 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2304 }
2305
2306 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2307 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2308 if (drv_tx_frames_pending(local)) {
2309 mod_timer(&local->dynamic_ps_timer, jiffies +
2310 msecs_to_jiffies(
2311 local->hw.conf.dynamic_ps_timeout));
2312 } else {
2313 ieee80211_send_nullfunc(local, sdata, true);
2314 /* Flush to get the tx status of nullfunc frame */
2315 ieee80211_flush_queues(local, sdata, false);
2316 }
2317 }
2318
2319 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
2320 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
2321 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
2322 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
2323 local->hw.conf.flags |= IEEE80211_CONF_PS;
2324 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2325 }
2326 }
2327
ieee80211_dynamic_ps_timer(struct timer_list * t)2328 void ieee80211_dynamic_ps_timer(struct timer_list *t)
2329 {
2330 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
2331
2332 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
2333 }
2334
ieee80211_dfs_cac_timer_work(struct work_struct * work)2335 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
2336 {
2337 struct delayed_work *delayed_work = to_delayed_work(work);
2338 struct ieee80211_link_data *link =
2339 container_of(delayed_work, struct ieee80211_link_data,
2340 dfs_cac_timer_work);
2341 struct cfg80211_chan_def chandef = link->conf->chandef;
2342 struct ieee80211_sub_if_data *sdata = link->sdata;
2343
2344 mutex_lock(&sdata->local->mtx);
2345 if (sdata->wdev.cac_started) {
2346 ieee80211_link_release_channel(link);
2347 cfg80211_cac_event(sdata->dev, &chandef,
2348 NL80211_RADAR_CAC_FINISHED,
2349 GFP_KERNEL);
2350 }
2351 mutex_unlock(&sdata->local->mtx);
2352 }
2353
2354 static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2355 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2356 {
2357 struct ieee80211_local *local = sdata->local;
2358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2359 bool ret = false;
2360 int ac;
2361
2362 if (local->hw.queues < IEEE80211_NUM_ACS)
2363 return false;
2364
2365 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2366 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2367 int non_acm_ac;
2368 unsigned long now = jiffies;
2369
2370 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
2371 tx_tspec->admitted_time &&
2372 time_after(now, tx_tspec->time_slice_start + HZ)) {
2373 tx_tspec->consumed_tx_time = 0;
2374 tx_tspec->time_slice_start = now;
2375
2376 if (tx_tspec->downgraded)
2377 tx_tspec->action =
2378 TX_TSPEC_ACTION_STOP_DOWNGRADE;
2379 }
2380
2381 switch (tx_tspec->action) {
2382 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
2383 /* take the original parameters */
2384 if (drv_conf_tx(local, &sdata->deflink, ac,
2385 &sdata->deflink.tx_conf[ac]))
2386 link_err(&sdata->deflink,
2387 "failed to set TX queue parameters for queue %d\n",
2388 ac);
2389 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2390 tx_tspec->downgraded = false;
2391 ret = true;
2392 break;
2393 case TX_TSPEC_ACTION_DOWNGRADE:
2394 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2395 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2396 ret = true;
2397 break;
2398 }
2399 /* downgrade next lower non-ACM AC */
2400 for (non_acm_ac = ac + 1;
2401 non_acm_ac < IEEE80211_NUM_ACS;
2402 non_acm_ac++)
2403 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
2404 break;
2405 /* Usually the loop will result in using BK even if it
2406 * requires admission control, but such a configuration
2407 * makes no sense and we have to transmit somehow - the
2408 * AC selection does the same thing.
2409 * If we started out trying to downgrade from BK, then
2410 * the extra condition here might be needed.
2411 */
2412 if (non_acm_ac >= IEEE80211_NUM_ACS)
2413 non_acm_ac = IEEE80211_AC_BK;
2414 if (drv_conf_tx(local, &sdata->deflink, ac,
2415 &sdata->deflink.tx_conf[non_acm_ac]))
2416 link_err(&sdata->deflink,
2417 "failed to set TX queue parameters for queue %d\n",
2418 ac);
2419 tx_tspec->action = TX_TSPEC_ACTION_NONE;
2420 ret = true;
2421 schedule_delayed_work(&ifmgd->tx_tspec_wk,
2422 tx_tspec->time_slice_start + HZ - now + 1);
2423 break;
2424 case TX_TSPEC_ACTION_NONE:
2425 /* nothing now */
2426 break;
2427 }
2428 }
2429
2430 return ret;
2431 }
2432
ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)2433 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
2434 {
2435 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
2436 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
2437 BSS_CHANGED_QOS);
2438 }
2439
ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct * work)2440 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
2441 {
2442 struct ieee80211_sub_if_data *sdata;
2443
2444 sdata = container_of(work, struct ieee80211_sub_if_data,
2445 u.mgd.tx_tspec_wk.work);
2446 ieee80211_sta_handle_tspec_ac_params(sdata);
2447 }
2448
ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data * link)2449 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
2450 {
2451 struct ieee80211_sub_if_data *sdata = link->sdata;
2452 struct ieee80211_local *local = sdata->local;
2453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2454 struct ieee80211_tx_queue_params *params = link->tx_conf;
2455 u8 ac;
2456
2457 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2458 mlme_dbg(sdata,
2459 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
2460 ac, params[ac].acm,
2461 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
2462 params[ac].txop, params[ac].uapsd,
2463 ifmgd->tx_tspec[ac].downgraded);
2464 if (!ifmgd->tx_tspec[ac].downgraded &&
2465 drv_conf_tx(local, link, ac, ¶ms[ac]))
2466 link_err(link,
2467 "failed to set TX queue parameters for AC %d\n",
2468 ac);
2469 }
2470 }
2471
2472 /* MLME */
2473 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)2474 ieee80211_sta_wmm_params(struct ieee80211_local *local,
2475 struct ieee80211_link_data *link,
2476 const u8 *wmm_param, size_t wmm_param_len,
2477 const struct ieee80211_mu_edca_param_set *mu_edca)
2478 {
2479 struct ieee80211_sub_if_data *sdata = link->sdata;
2480 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482 size_t left;
2483 int count, mu_edca_count, ac;
2484 const u8 *pos;
2485 u8 uapsd_queues = 0;
2486
2487 if (!local->ops->conf_tx)
2488 return false;
2489
2490 if (local->hw.queues < IEEE80211_NUM_ACS)
2491 return false;
2492
2493 if (!wmm_param)
2494 return false;
2495
2496 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
2497 return false;
2498
2499 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
2500 uapsd_queues = ifmgd->uapsd_queues;
2501
2502 count = wmm_param[6] & 0x0f;
2503 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
2504 * if mu_edca was preset before and now it disappeared tell
2505 * the driver about it.
2506 */
2507 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
2508 if (count == link->u.mgd.wmm_last_param_set &&
2509 mu_edca_count == link->u.mgd.mu_edca_last_param_set)
2510 return false;
2511 link->u.mgd.wmm_last_param_set = count;
2512 link->u.mgd.mu_edca_last_param_set = mu_edca_count;
2513
2514 pos = wmm_param + 8;
2515 left = wmm_param_len - 8;
2516
2517 memset(¶ms, 0, sizeof(params));
2518
2519 sdata->wmm_acm = 0;
2520 for (; left >= 4; left -= 4, pos += 4) {
2521 int aci = (pos[0] >> 5) & 0x03;
2522 int acm = (pos[0] >> 4) & 0x01;
2523 bool uapsd = false;
2524
2525 switch (aci) {
2526 case 1: /* AC_BK */
2527 ac = IEEE80211_AC_BK;
2528 if (acm)
2529 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
2530 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
2531 uapsd = true;
2532 params[ac].mu_edca = !!mu_edca;
2533 if (mu_edca)
2534 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
2535 break;
2536 case 2: /* AC_VI */
2537 ac = IEEE80211_AC_VI;
2538 if (acm)
2539 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
2540 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
2541 uapsd = true;
2542 params[ac].mu_edca = !!mu_edca;
2543 if (mu_edca)
2544 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
2545 break;
2546 case 3: /* AC_VO */
2547 ac = IEEE80211_AC_VO;
2548 if (acm)
2549 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
2550 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
2551 uapsd = true;
2552 params[ac].mu_edca = !!mu_edca;
2553 if (mu_edca)
2554 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
2555 break;
2556 case 0: /* AC_BE */
2557 default:
2558 ac = IEEE80211_AC_BE;
2559 if (acm)
2560 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
2561 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
2562 uapsd = true;
2563 params[ac].mu_edca = !!mu_edca;
2564 if (mu_edca)
2565 params[ac].mu_edca_param_rec = mu_edca->ac_be;
2566 break;
2567 }
2568
2569 params[ac].aifs = pos[0] & 0x0f;
2570
2571 if (params[ac].aifs < 2) {
2572 sdata_info(sdata,
2573 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2574 params[ac].aifs, aci);
2575 params[ac].aifs = 2;
2576 }
2577 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
2578 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
2579 params[ac].txop = get_unaligned_le16(pos + 2);
2580 params[ac].acm = acm;
2581 params[ac].uapsd = uapsd;
2582
2583 if (params[ac].cw_min == 0 ||
2584 params[ac].cw_min > params[ac].cw_max) {
2585 sdata_info(sdata,
2586 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
2587 params[ac].cw_min, params[ac].cw_max, aci);
2588 return false;
2589 }
2590 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
2591 }
2592
2593 /* WMM specification requires all 4 ACIs. */
2594 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
2595 if (params[ac].cw_min == 0) {
2596 sdata_info(sdata,
2597 "AP has invalid WMM params (missing AC %d), using defaults\n",
2598 ac);
2599 return false;
2600 }
2601 }
2602
2603 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2604 link->tx_conf[ac] = params[ac];
2605
2606 ieee80211_mgd_set_link_qos_params(link);
2607
2608 /* enable WMM or activate new settings */
2609 link->conf->qos = true;
2610 return true;
2611 }
2612
__ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2613 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2614 {
2615 lockdep_assert_held(&sdata->local->mtx);
2616
2617 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
2618 ieee80211_run_deferred_scan(sdata->local);
2619 }
2620
ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)2621 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
2622 {
2623 mutex_lock(&sdata->local->mtx);
2624 __ieee80211_stop_poll(sdata);
2625 mutex_unlock(&sdata->local->mtx);
2626 }
2627
ieee80211_handle_bss_capability(struct ieee80211_link_data * link,u16 capab,bool erp_valid,u8 erp)2628 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
2629 u16 capab, bool erp_valid, u8 erp)
2630 {
2631 struct ieee80211_bss_conf *bss_conf = link->conf;
2632 struct ieee80211_supported_band *sband;
2633 u32 changed = 0;
2634 bool use_protection;
2635 bool use_short_preamble;
2636 bool use_short_slot;
2637
2638 sband = ieee80211_get_link_sband(link);
2639 if (!sband)
2640 return changed;
2641
2642 if (erp_valid) {
2643 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
2644 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
2645 } else {
2646 use_protection = false;
2647 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
2648 }
2649
2650 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
2651 if (sband->band == NL80211_BAND_5GHZ ||
2652 sband->band == NL80211_BAND_6GHZ)
2653 use_short_slot = true;
2654
2655 if (use_protection != bss_conf->use_cts_prot) {
2656 bss_conf->use_cts_prot = use_protection;
2657 changed |= BSS_CHANGED_ERP_CTS_PROT;
2658 }
2659
2660 if (use_short_preamble != bss_conf->use_short_preamble) {
2661 bss_conf->use_short_preamble = use_short_preamble;
2662 changed |= BSS_CHANGED_ERP_PREAMBLE;
2663 }
2664
2665 if (use_short_slot != bss_conf->use_short_slot) {
2666 bss_conf->use_short_slot = use_short_slot;
2667 changed |= BSS_CHANGED_ERP_SLOT;
2668 }
2669
2670 return changed;
2671 }
2672
ieee80211_link_set_associated(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)2673 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link,
2674 struct cfg80211_bss *cbss)
2675 {
2676 struct ieee80211_sub_if_data *sdata = link->sdata;
2677 struct ieee80211_bss_conf *bss_conf = link->conf;
2678 struct ieee80211_bss *bss = (void *)cbss->priv;
2679 u32 changed = BSS_CHANGED_QOS;
2680
2681 /* not really used in MLO */
2682 sdata->u.mgd.beacon_timeout =
2683 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
2684 bss_conf->beacon_int));
2685
2686 changed |= ieee80211_handle_bss_capability(link,
2687 bss_conf->assoc_capability,
2688 bss->has_erp_value,
2689 bss->erp_value);
2690
2691 ieee80211_check_rate_mask(link);
2692
2693 link->u.mgd.bss = cbss;
2694 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
2695
2696 if (sdata->vif.p2p ||
2697 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
2698 const struct cfg80211_bss_ies *ies;
2699
2700 rcu_read_lock();
2701 ies = rcu_dereference(cbss->ies);
2702 if (ies) {
2703 int ret;
2704
2705 ret = cfg80211_get_p2p_attr(
2706 ies->data, ies->len,
2707 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2708 (u8 *) &bss_conf->p2p_noa_attr,
2709 sizeof(bss_conf->p2p_noa_attr));
2710 if (ret >= 2) {
2711 link->u.mgd.p2p_noa_index =
2712 bss_conf->p2p_noa_attr.index;
2713 changed |= BSS_CHANGED_P2P_PS;
2714 }
2715 }
2716 rcu_read_unlock();
2717 }
2718
2719 if (link->u.mgd.have_beacon) {
2720 /*
2721 * If the AP is buggy we may get here with no DTIM period
2722 * known, so assume it's 1 which is the only safe assumption
2723 * in that case, although if the TIM IE is broken powersave
2724 * probably just won't work at all.
2725 */
2726 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1;
2727 bss_conf->beacon_rate = bss->beacon_rate;
2728 changed |= BSS_CHANGED_BEACON_INFO;
2729 } else {
2730 bss_conf->beacon_rate = NULL;
2731 bss_conf->dtim_period = 0;
2732 }
2733
2734 /* Tell the driver to monitor connection quality (if supported) */
2735 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
2736 bss_conf->cqm_rssi_thold)
2737 changed |= BSS_CHANGED_CQM;
2738
2739 return changed;
2740 }
2741
ieee80211_set_associated(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])2742 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
2743 struct ieee80211_mgd_assoc_data *assoc_data,
2744 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
2745 {
2746 struct ieee80211_local *local = sdata->local;
2747 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
2748 u64 vif_changed = BSS_CHANGED_ASSOC;
2749 unsigned int link_id;
2750
2751 sdata->u.mgd.associated = true;
2752
2753 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
2754 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2755 struct ieee80211_link_data *link;
2756
2757 if (!cbss)
2758 continue;
2759
2760 link = sdata_dereference(sdata->link[link_id], sdata);
2761 if (WARN_ON(!link))
2762 return;
2763
2764 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
2765 }
2766
2767 /* just to be sure */
2768 ieee80211_stop_poll(sdata);
2769
2770 ieee80211_led_assoc(local, 1);
2771
2772 vif_cfg->assoc = 1;
2773
2774 /* Enable ARP filtering */
2775 if (vif_cfg->arp_addr_cnt)
2776 vif_changed |= BSS_CHANGED_ARP_FILTER;
2777
2778 if (sdata->vif.valid_links) {
2779 for (link_id = 0;
2780 link_id < IEEE80211_MLD_MAX_NUM_LINKS;
2781 link_id++) {
2782 struct ieee80211_link_data *link;
2783 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
2784
2785 if (!cbss)
2786 continue;
2787
2788 link = sdata_dereference(sdata->link[link_id], sdata);
2789 if (WARN_ON(!link))
2790 return;
2791
2792 ieee80211_link_info_change_notify(sdata, link,
2793 changed[link_id]);
2794
2795 ieee80211_recalc_smps(sdata, link);
2796 }
2797
2798 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
2799 } else {
2800 ieee80211_bss_info_change_notify(sdata,
2801 vif_changed | changed[0]);
2802 }
2803
2804 mutex_lock(&local->iflist_mtx);
2805 ieee80211_recalc_ps(local);
2806 mutex_unlock(&local->iflist_mtx);
2807
2808 /* leave this here to not change ordering in non-MLO cases */
2809 if (!sdata->vif.valid_links)
2810 ieee80211_recalc_smps(sdata, &sdata->deflink);
2811 ieee80211_recalc_ps_vif(sdata);
2812
2813 netif_carrier_on(sdata->dev);
2814 }
2815
ieee80211_set_disassoc(struct ieee80211_sub_if_data * sdata,u16 stype,u16 reason,bool tx,u8 * frame_buf)2816 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
2817 u16 stype, u16 reason, bool tx,
2818 u8 *frame_buf)
2819 {
2820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2821 struct ieee80211_local *local = sdata->local;
2822 unsigned int link_id;
2823 u32 changed = 0;
2824 struct ieee80211_prep_tx_info info = {
2825 .subtype = stype,
2826 };
2827
2828 sdata_assert_lock(sdata);
2829
2830 if (WARN_ON_ONCE(tx && !frame_buf))
2831 return;
2832
2833 if (WARN_ON(!ifmgd->associated))
2834 return;
2835
2836 ieee80211_stop_poll(sdata);
2837
2838 ifmgd->associated = false;
2839
2840 /* other links will be destroyed */
2841 sdata->deflink.u.mgd.bss = NULL;
2842
2843 netif_carrier_off(sdata->dev);
2844
2845 /*
2846 * if we want to get out of ps before disassoc (why?) we have
2847 * to do it before sending disassoc, as otherwise the null-packet
2848 * won't be valid.
2849 */
2850 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2851 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2852 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2853 }
2854 local->ps_sdata = NULL;
2855
2856 /* disable per-vif ps */
2857 ieee80211_recalc_ps_vif(sdata);
2858
2859 /* make sure ongoing transmission finishes */
2860 synchronize_net();
2861
2862 /*
2863 * drop any frame before deauth/disassoc, this can be data or
2864 * management frame. Since we are disconnecting, we should not
2865 * insist sending these frames which can take time and delay
2866 * the disconnection and possible the roaming.
2867 */
2868 if (tx)
2869 ieee80211_flush_queues(local, sdata, true);
2870
2871 /* deauthenticate/disassociate now */
2872 if (tx || frame_buf) {
2873 /*
2874 * In multi channel scenarios guarantee that the virtual
2875 * interface is granted immediate airtime to transmit the
2876 * deauthentication frame by calling mgd_prepare_tx, if the
2877 * driver requested so.
2878 */
2879 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
2880 !sdata->deflink.u.mgd.have_beacon) {
2881 drv_mgd_prepare_tx(sdata->local, sdata, &info);
2882 }
2883
2884 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
2885 sdata->vif.cfg.ap_addr, stype,
2886 reason, tx, frame_buf);
2887 }
2888
2889 /* flush out frame - make sure the deauth was actually sent */
2890 if (tx)
2891 ieee80211_flush_queues(local, sdata, false);
2892
2893 drv_mgd_complete_tx(sdata->local, sdata, &info);
2894
2895 /* clear AP addr only after building the needed mgmt frames */
2896 eth_zero_addr(sdata->deflink.u.mgd.bssid);
2897 eth_zero_addr(sdata->vif.cfg.ap_addr);
2898
2899 sdata->vif.cfg.ssid_len = 0;
2900
2901 /* remove AP and TDLS peers */
2902 sta_info_flush(sdata);
2903
2904 /* finally reset all BSS / config parameters */
2905 if (!sdata->vif.valid_links)
2906 changed |= ieee80211_reset_erp_info(sdata);
2907
2908 ieee80211_led_assoc(local, 0);
2909 changed |= BSS_CHANGED_ASSOC;
2910 sdata->vif.cfg.assoc = false;
2911
2912 sdata->deflink.u.mgd.p2p_noa_index = -1;
2913 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2914 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
2915
2916 /* on the next assoc, re-program HT/VHT parameters */
2917 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2918 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
2919 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2920 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
2921
2922 /*
2923 * reset MU-MIMO ownership and group data in default link,
2924 * if used, other links are destroyed
2925 */
2926 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2927 sizeof(sdata->vif.bss_conf.mu_group.membership));
2928 memset(sdata->vif.bss_conf.mu_group.position, 0,
2929 sizeof(sdata->vif.bss_conf.mu_group.position));
2930 if (!sdata->vif.valid_links)
2931 changed |= BSS_CHANGED_MU_GROUPS;
2932 sdata->vif.bss_conf.mu_mimo_owner = false;
2933
2934 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2935
2936 del_timer_sync(&local->dynamic_ps_timer);
2937 cancel_work_sync(&local->dynamic_ps_enable_work);
2938
2939 /* Disable ARP filtering */
2940 if (sdata->vif.cfg.arp_addr_cnt)
2941 changed |= BSS_CHANGED_ARP_FILTER;
2942
2943 sdata->vif.bss_conf.qos = false;
2944 if (!sdata->vif.valid_links) {
2945 changed |= BSS_CHANGED_QOS;
2946 /* The BSSID (not really interesting) and HT changed */
2947 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
2948 ieee80211_bss_info_change_notify(sdata, changed);
2949 } else {
2950 ieee80211_vif_cfg_change_notify(sdata, changed);
2951 }
2952
2953 /* disassociated - set to defaults now */
2954 ieee80211_set_wmm_default(&sdata->deflink, false, false);
2955
2956 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2957 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2958 del_timer_sync(&sdata->u.mgd.timer);
2959 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
2960
2961 sdata->vif.bss_conf.dtim_period = 0;
2962 sdata->vif.bss_conf.beacon_rate = NULL;
2963
2964 sdata->deflink.u.mgd.have_beacon = false;
2965 sdata->deflink.u.mgd.tracking_signal_avg = false;
2966 sdata->deflink.u.mgd.disable_wmm_tracking = false;
2967
2968 ifmgd->flags = 0;
2969 sdata->deflink.u.mgd.conn_flags = 0;
2970 mutex_lock(&local->mtx);
2971
2972 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
2973 struct ieee80211_link_data *link;
2974
2975 link = sdata_dereference(sdata->link[link_id], sdata);
2976 if (!link)
2977 continue;
2978 ieee80211_link_release_channel(link);
2979 }
2980
2981 sdata->vif.bss_conf.csa_active = false;
2982 sdata->deflink.u.mgd.csa_waiting_bcn = false;
2983 sdata->deflink.u.mgd.csa_ignored_same_chan = false;
2984 if (sdata->deflink.csa_block_tx) {
2985 ieee80211_wake_vif_queues(local, sdata,
2986 IEEE80211_QUEUE_STOP_REASON_CSA);
2987 sdata->deflink.csa_block_tx = false;
2988 }
2989 mutex_unlock(&local->mtx);
2990
2991 /* existing TX TSPEC sessions no longer exist */
2992 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2993 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2994
2995 sdata->vif.bss_conf.pwr_reduction = 0;
2996 sdata->vif.bss_conf.tx_pwr_env_num = 0;
2997 memset(sdata->vif.bss_conf.tx_pwr_env, 0,
2998 sizeof(sdata->vif.bss_conf.tx_pwr_env));
2999
3000 ieee80211_vif_set_links(sdata, 0);
3001 }
3002
ieee80211_reset_ap_probe(struct ieee80211_sub_if_data * sdata)3003 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
3004 {
3005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3006 struct ieee80211_local *local = sdata->local;
3007
3008 mutex_lock(&local->mtx);
3009 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3010 goto out;
3011
3012 __ieee80211_stop_poll(sdata);
3013
3014 mutex_lock(&local->iflist_mtx);
3015 ieee80211_recalc_ps(local);
3016 mutex_unlock(&local->iflist_mtx);
3017
3018 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3019 goto out;
3020
3021 /*
3022 * We've received a probe response, but are not sure whether
3023 * we have or will be receiving any beacons or data, so let's
3024 * schedule the timers again, just in case.
3025 */
3026 ieee80211_sta_reset_beacon_monitor(sdata);
3027
3028 mod_timer(&ifmgd->conn_mon_timer,
3029 round_jiffies_up(jiffies +
3030 IEEE80211_CONNECTION_IDLE_TIME));
3031 out:
3032 mutex_unlock(&local->mtx);
3033 }
3034
ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,u16 tx_time)3035 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3036 struct ieee80211_hdr *hdr,
3037 u16 tx_time)
3038 {
3039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3040 u16 tid;
3041 int ac;
3042 struct ieee80211_sta_tx_tspec *tx_tspec;
3043 unsigned long now = jiffies;
3044
3045 if (!ieee80211_is_data_qos(hdr->frame_control))
3046 return;
3047
3048 tid = ieee80211_get_tid(hdr);
3049 ac = ieee80211_ac_from_tid(tid);
3050 tx_tspec = &ifmgd->tx_tspec[ac];
3051
3052 if (likely(!tx_tspec->admitted_time))
3053 return;
3054
3055 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3056 tx_tspec->consumed_tx_time = 0;
3057 tx_tspec->time_slice_start = now;
3058
3059 if (tx_tspec->downgraded) {
3060 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3061 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3062 }
3063 }
3064
3065 if (tx_tspec->downgraded)
3066 return;
3067
3068 tx_tspec->consumed_tx_time += tx_time;
3069
3070 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3071 tx_tspec->downgraded = true;
3072 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3073 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
3074 }
3075 }
3076
ieee80211_sta_tx_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,bool ack,u16 tx_time)3077 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3078 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3079 {
3080 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3081
3082 if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3083 !sdata->u.mgd.probe_send_count)
3084 return;
3085
3086 if (ack)
3087 sdata->u.mgd.probe_send_count = 0;
3088 else
3089 sdata->u.mgd.nullfunc_failed = true;
3090 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3091 }
3092
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)3093 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3094 const u8 *src, const u8 *dst,
3095 const u8 *ssid, size_t ssid_len,
3096 struct ieee80211_channel *channel)
3097 {
3098 struct sk_buff *skb;
3099
3100 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3101 ssid, ssid_len, NULL, 0,
3102 IEEE80211_PROBE_FLAG_DIRECTED);
3103 if (skb)
3104 ieee80211_tx_skb(sdata, skb);
3105 }
3106
ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data * sdata)3107 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3108 {
3109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3110 u8 *dst = sdata->vif.cfg.ap_addr;
3111 u8 unicast_limit = max(1, max_probe_tries - 3);
3112 struct sta_info *sta;
3113
3114 if (WARN_ON(sdata->vif.valid_links))
3115 return;
3116
3117 /*
3118 * Try sending broadcast probe requests for the last three
3119 * probe requests after the first ones failed since some
3120 * buggy APs only support broadcast probe requests.
3121 */
3122 if (ifmgd->probe_send_count >= unicast_limit)
3123 dst = NULL;
3124
3125 /*
3126 * When the hardware reports an accurate Tx ACK status, it's
3127 * better to send a nullfunc frame instead of a probe request,
3128 * as it will kick us off the AP quickly if we aren't associated
3129 * anymore. The timeout will be reset if the frame is ACKed by
3130 * the AP.
3131 */
3132 ifmgd->probe_send_count++;
3133
3134 if (dst) {
3135 mutex_lock(&sdata->local->sta_mtx);
3136 sta = sta_info_get(sdata, dst);
3137 if (!WARN_ON(!sta))
3138 ieee80211_check_fast_rx(sta);
3139 mutex_unlock(&sdata->local->sta_mtx);
3140 }
3141
3142 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3143 ifmgd->nullfunc_failed = false;
3144 ieee80211_send_nullfunc(sdata->local, sdata, false);
3145 } else {
3146 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3147 sdata->vif.cfg.ssid,
3148 sdata->vif.cfg.ssid_len,
3149 sdata->deflink.u.mgd.bss->channel);
3150 }
3151
3152 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3153 run_again(sdata, ifmgd->probe_timeout);
3154 }
3155
ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data * sdata,bool beacon)3156 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3157 bool beacon)
3158 {
3159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3160 bool already = false;
3161
3162 if (WARN_ON(sdata->vif.valid_links))
3163 return;
3164
3165 if (!ieee80211_sdata_running(sdata))
3166 return;
3167
3168 sdata_lock(sdata);
3169
3170 if (!ifmgd->associated)
3171 goto out;
3172
3173 mutex_lock(&sdata->local->mtx);
3174
3175 if (sdata->local->tmp_channel || sdata->local->scanning) {
3176 mutex_unlock(&sdata->local->mtx);
3177 goto out;
3178 }
3179
3180 if (sdata->local->suspending) {
3181 /* reschedule after resume */
3182 mutex_unlock(&sdata->local->mtx);
3183 ieee80211_reset_ap_probe(sdata);
3184 goto out;
3185 }
3186
3187 if (beacon) {
3188 mlme_dbg_ratelimited(sdata,
3189 "detected beacon loss from AP (missed %d beacons) - probing\n",
3190 beacon_loss_count);
3191
3192 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3193 }
3194
3195 /*
3196 * The driver/our work has already reported this event or the
3197 * connection monitoring has kicked in and we have already sent
3198 * a probe request. Or maybe the AP died and the driver keeps
3199 * reporting until we disassociate...
3200 *
3201 * In either case we have to ignore the current call to this
3202 * function (except for setting the correct probe reason bit)
3203 * because otherwise we would reset the timer every time and
3204 * never check whether we received a probe response!
3205 */
3206 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3207 already = true;
3208
3209 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3210
3211 mutex_unlock(&sdata->local->mtx);
3212
3213 if (already)
3214 goto out;
3215
3216 mutex_lock(&sdata->local->iflist_mtx);
3217 ieee80211_recalc_ps(sdata->local);
3218 mutex_unlock(&sdata->local->iflist_mtx);
3219
3220 ifmgd->probe_send_count = 0;
3221 ieee80211_mgd_probe_ap_send(sdata);
3222 out:
3223 sdata_unlock(sdata);
3224 }
3225
ieee80211_ap_probereq_get(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3226 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3227 struct ieee80211_vif *vif)
3228 {
3229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3231 struct cfg80211_bss *cbss;
3232 struct sk_buff *skb;
3233 const struct element *ssid;
3234 int ssid_len;
3235
3236 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3237 sdata->vif.valid_links))
3238 return NULL;
3239
3240 sdata_assert_lock(sdata);
3241
3242 if (ifmgd->associated)
3243 cbss = sdata->deflink.u.mgd.bss;
3244 else if (ifmgd->auth_data)
3245 cbss = ifmgd->auth_data->bss;
3246 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3247 cbss = ifmgd->assoc_data->link[0].bss;
3248 else
3249 return NULL;
3250
3251 rcu_read_lock();
3252 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3253 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3254 "invalid SSID element (len=%d)",
3255 ssid ? ssid->datalen : -1))
3256 ssid_len = 0;
3257 else
3258 ssid_len = ssid->datalen;
3259
3260 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3261 (u32) -1, cbss->channel,
3262 ssid->data, ssid_len,
3263 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3264 rcu_read_unlock();
3265
3266 return skb;
3267 }
3268 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3269
ieee80211_report_disconnect(struct ieee80211_sub_if_data * sdata,const u8 * buf,size_t len,bool tx,u16 reason,bool reconnect)3270 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3271 const u8 *buf, size_t len, bool tx,
3272 u16 reason, bool reconnect)
3273 {
3274 struct ieee80211_event event = {
3275 .type = MLME_EVENT,
3276 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3277 .u.mlme.reason = reason,
3278 };
3279
3280 if (tx)
3281 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3282 else
3283 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3284
3285 drv_event_callback(sdata->local, sdata, &event);
3286 }
3287
__ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)3288 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3289 {
3290 struct ieee80211_local *local = sdata->local;
3291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3292 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3293 bool tx;
3294
3295 sdata_lock(sdata);
3296 if (!ifmgd->associated) {
3297 sdata_unlock(sdata);
3298 return;
3299 }
3300
3301 /* in MLO assume we have a link where we can TX the frame */
3302 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx;
3303
3304 if (!ifmgd->driver_disconnect) {
3305 unsigned int link_id;
3306
3307 /*
3308 * AP is probably out of range (or not reachable for another
3309 * reason) so remove the bss structs for that AP. In the case
3310 * of multi-link, it's not clear that all of them really are
3311 * out of range, but if they weren't the driver likely would
3312 * have switched to just have a single link active?
3313 */
3314 for (link_id = 0;
3315 link_id < ARRAY_SIZE(sdata->link);
3316 link_id++) {
3317 struct ieee80211_link_data *link;
3318
3319 link = sdata_dereference(sdata->link[link_id], sdata);
3320 if (!link)
3321 continue;
3322 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss);
3323 link->u.mgd.bss = NULL;
3324 }
3325 }
3326
3327 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3328 ifmgd->driver_disconnect ?
3329 WLAN_REASON_DEAUTH_LEAVING :
3330 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3331 tx, frame_buf);
3332 mutex_lock(&local->mtx);
3333 /* the other links will be destroyed */
3334 sdata->vif.bss_conf.csa_active = false;
3335 sdata->deflink.u.mgd.csa_waiting_bcn = false;
3336 if (sdata->deflink.csa_block_tx) {
3337 ieee80211_wake_vif_queues(local, sdata,
3338 IEEE80211_QUEUE_STOP_REASON_CSA);
3339 sdata->deflink.csa_block_tx = false;
3340 }
3341 mutex_unlock(&local->mtx);
3342
3343 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
3344 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3345 ifmgd->reconnect);
3346 ifmgd->reconnect = false;
3347
3348 sdata_unlock(sdata);
3349 }
3350
ieee80211_beacon_connection_loss_work(struct work_struct * work)3351 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
3352 {
3353 struct ieee80211_sub_if_data *sdata =
3354 container_of(work, struct ieee80211_sub_if_data,
3355 u.mgd.beacon_connection_loss_work);
3356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3357
3358 if (ifmgd->connection_loss) {
3359 sdata_info(sdata, "Connection to AP %pM lost\n",
3360 sdata->vif.cfg.ap_addr);
3361 __ieee80211_disconnect(sdata);
3362 ifmgd->connection_loss = false;
3363 } else if (ifmgd->driver_disconnect) {
3364 sdata_info(sdata,
3365 "Driver requested disconnection from AP %pM\n",
3366 sdata->vif.cfg.ap_addr);
3367 __ieee80211_disconnect(sdata);
3368 ifmgd->driver_disconnect = false;
3369 } else {
3370 if (ifmgd->associated)
3371 sdata->deflink.u.mgd.beacon_loss_count++;
3372 ieee80211_mgd_probe_ap(sdata, true);
3373 }
3374 }
3375
ieee80211_csa_connection_drop_work(struct work_struct * work)3376 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
3377 {
3378 struct ieee80211_sub_if_data *sdata =
3379 container_of(work, struct ieee80211_sub_if_data,
3380 u.mgd.csa_connection_drop_work);
3381
3382 __ieee80211_disconnect(sdata);
3383 }
3384
ieee80211_beacon_loss(struct ieee80211_vif * vif)3385 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
3386 {
3387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3388 struct ieee80211_hw *hw = &sdata->local->hw;
3389
3390 trace_api_beacon_loss(sdata);
3391
3392 sdata->u.mgd.connection_loss = false;
3393 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3394 }
3395 EXPORT_SYMBOL(ieee80211_beacon_loss);
3396
ieee80211_connection_loss(struct ieee80211_vif * vif)3397 void ieee80211_connection_loss(struct ieee80211_vif *vif)
3398 {
3399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3400 struct ieee80211_hw *hw = &sdata->local->hw;
3401
3402 trace_api_connection_loss(sdata);
3403
3404 sdata->u.mgd.connection_loss = true;
3405 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3406 }
3407 EXPORT_SYMBOL(ieee80211_connection_loss);
3408
ieee80211_disconnect(struct ieee80211_vif * vif,bool reconnect)3409 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
3410 {
3411 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3412 struct ieee80211_hw *hw = &sdata->local->hw;
3413
3414 trace_api_disconnect(sdata, reconnect);
3415
3416 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
3417 return;
3418
3419 sdata->u.mgd.driver_disconnect = true;
3420 sdata->u.mgd.reconnect = reconnect;
3421 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
3422 }
3423 EXPORT_SYMBOL(ieee80211_disconnect);
3424
ieee80211_destroy_auth_data(struct ieee80211_sub_if_data * sdata,bool assoc)3425 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
3426 bool assoc)
3427 {
3428 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3429
3430 sdata_assert_lock(sdata);
3431
3432 if (!assoc) {
3433 /*
3434 * we are not authenticated yet, the only timer that could be
3435 * running is the timeout for the authentication response which
3436 * which is not relevant anymore.
3437 */
3438 del_timer_sync(&sdata->u.mgd.timer);
3439 sta_info_destroy_addr(sdata, auth_data->ap_addr);
3440
3441 /* other links are destroyed */
3442 sdata->deflink.u.mgd.conn_flags = 0;
3443 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3444 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3445 BSS_CHANGED_BSSID);
3446 sdata->u.mgd.flags = 0;
3447
3448 mutex_lock(&sdata->local->mtx);
3449 ieee80211_link_release_channel(&sdata->deflink);
3450 ieee80211_vif_set_links(sdata, 0);
3451 mutex_unlock(&sdata->local->mtx);
3452 }
3453
3454 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
3455 kfree(auth_data);
3456 sdata->u.mgd.auth_data = NULL;
3457 }
3458
3459 enum assoc_status {
3460 ASSOC_SUCCESS,
3461 ASSOC_REJECTED,
3462 ASSOC_TIMEOUT,
3463 ASSOC_ABANDON,
3464 };
3465
ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data * sdata,enum assoc_status status)3466 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
3467 enum assoc_status status)
3468 {
3469 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3470
3471 sdata_assert_lock(sdata);
3472
3473 if (status != ASSOC_SUCCESS) {
3474 /*
3475 * we are not associated yet, the only timer that could be
3476 * running is the timeout for the association response which
3477 * which is not relevant anymore.
3478 */
3479 del_timer_sync(&sdata->u.mgd.timer);
3480 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
3481
3482 sdata->deflink.u.mgd.conn_flags = 0;
3483 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3484 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3485 BSS_CHANGED_BSSID);
3486 sdata->u.mgd.flags = 0;
3487 sdata->vif.bss_conf.mu_mimo_owner = false;
3488
3489 if (status != ASSOC_REJECTED) {
3490 struct cfg80211_assoc_failure data = {
3491 .timeout = status == ASSOC_TIMEOUT,
3492 };
3493 int i;
3494
3495 BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
3496 ARRAY_SIZE(assoc_data->link));
3497
3498 for (i = 0; i < ARRAY_SIZE(data.bss); i++)
3499 data.bss[i] = assoc_data->link[i].bss;
3500
3501 if (sdata->vif.valid_links)
3502 data.ap_mld_addr = assoc_data->ap_addr;
3503
3504 cfg80211_assoc_failure(sdata->dev, &data);
3505 }
3506
3507 mutex_lock(&sdata->local->mtx);
3508 ieee80211_link_release_channel(&sdata->deflink);
3509 ieee80211_vif_set_links(sdata, 0);
3510 mutex_unlock(&sdata->local->mtx);
3511 }
3512
3513 kfree(assoc_data);
3514 sdata->u.mgd.assoc_data = NULL;
3515 }
3516
ieee80211_auth_challenge(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3517 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
3518 struct ieee80211_mgmt *mgmt, size_t len)
3519 {
3520 struct ieee80211_local *local = sdata->local;
3521 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
3522 const struct element *challenge;
3523 u8 *pos;
3524 u32 tx_flags = 0;
3525 struct ieee80211_prep_tx_info info = {
3526 .subtype = IEEE80211_STYPE_AUTH,
3527 };
3528
3529 pos = mgmt->u.auth.variable;
3530 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
3531 len - (pos - (u8 *)mgmt));
3532 if (!challenge)
3533 return;
3534 auth_data->expected_transaction = 4;
3535 drv_mgd_prepare_tx(sdata->local, sdata, &info);
3536 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3537 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3538 IEEE80211_TX_INTFL_MLME_CONN_TX;
3539 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
3540 (void *)challenge,
3541 challenge->datalen + sizeof(*challenge),
3542 auth_data->ap_addr, auth_data->ap_addr,
3543 auth_data->key, auth_data->key_len,
3544 auth_data->key_idx, tx_flags);
3545 }
3546
ieee80211_mark_sta_auth(struct ieee80211_sub_if_data * sdata)3547 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
3548 {
3549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3550 const u8 *ap_addr = ifmgd->auth_data->ap_addr;
3551 struct sta_info *sta;
3552 bool result = true;
3553
3554 sdata_info(sdata, "authenticated\n");
3555 ifmgd->auth_data->done = true;
3556 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
3557 ifmgd->auth_data->timeout_started = true;
3558 run_again(sdata, ifmgd->auth_data->timeout);
3559
3560 /* move station state to auth */
3561 mutex_lock(&sdata->local->sta_mtx);
3562 sta = sta_info_get(sdata, ap_addr);
3563 if (!sta) {
3564 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
3565 result = false;
3566 goto out;
3567 }
3568 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
3569 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
3570 result = false;
3571 goto out;
3572 }
3573
3574 out:
3575 mutex_unlock(&sdata->local->sta_mtx);
3576 return result;
3577 }
3578
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3579 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
3580 struct ieee80211_mgmt *mgmt, size_t len)
3581 {
3582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3583 u16 auth_alg, auth_transaction, status_code;
3584 struct ieee80211_event event = {
3585 .type = MLME_EVENT,
3586 .u.mlme.data = AUTH_EVENT,
3587 };
3588 struct ieee80211_prep_tx_info info = {
3589 .subtype = IEEE80211_STYPE_AUTH,
3590 };
3591
3592 sdata_assert_lock(sdata);
3593
3594 if (len < 24 + 6)
3595 return;
3596
3597 if (!ifmgd->auth_data || ifmgd->auth_data->done)
3598 return;
3599
3600 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
3601 return;
3602
3603 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
3604 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
3605 status_code = le16_to_cpu(mgmt->u.auth.status_code);
3606
3607 if (auth_alg != ifmgd->auth_data->algorithm ||
3608 (auth_alg != WLAN_AUTH_SAE &&
3609 auth_transaction != ifmgd->auth_data->expected_transaction) ||
3610 (auth_alg == WLAN_AUTH_SAE &&
3611 (auth_transaction < ifmgd->auth_data->expected_transaction ||
3612 auth_transaction > 2))) {
3613 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
3614 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
3615 auth_transaction,
3616 ifmgd->auth_data->expected_transaction);
3617 goto notify_driver;
3618 }
3619
3620 if (status_code != WLAN_STATUS_SUCCESS) {
3621 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3622
3623 if (auth_alg == WLAN_AUTH_SAE &&
3624 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
3625 (auth_transaction == 1 &&
3626 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
3627 status_code == WLAN_STATUS_SAE_PK)))) {
3628 /* waiting for userspace now */
3629 ifmgd->auth_data->waiting = true;
3630 ifmgd->auth_data->timeout =
3631 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
3632 ifmgd->auth_data->timeout_started = true;
3633 run_again(sdata, ifmgd->auth_data->timeout);
3634 goto notify_driver;
3635 }
3636
3637 sdata_info(sdata, "%pM denied authentication (status %d)\n",
3638 mgmt->sa, status_code);
3639 ieee80211_destroy_auth_data(sdata, false);
3640 event.u.mlme.status = MLME_DENIED;
3641 event.u.mlme.reason = status_code;
3642 drv_event_callback(sdata->local, sdata, &event);
3643 goto notify_driver;
3644 }
3645
3646 switch (ifmgd->auth_data->algorithm) {
3647 case WLAN_AUTH_OPEN:
3648 case WLAN_AUTH_LEAP:
3649 case WLAN_AUTH_FT:
3650 case WLAN_AUTH_SAE:
3651 case WLAN_AUTH_FILS_SK:
3652 case WLAN_AUTH_FILS_SK_PFS:
3653 case WLAN_AUTH_FILS_PK:
3654 break;
3655 case WLAN_AUTH_SHARED_KEY:
3656 if (ifmgd->auth_data->expected_transaction != 4) {
3657 ieee80211_auth_challenge(sdata, mgmt, len);
3658 /* need another frame */
3659 return;
3660 }
3661 break;
3662 default:
3663 WARN_ONCE(1, "invalid auth alg %d",
3664 ifmgd->auth_data->algorithm);
3665 goto notify_driver;
3666 }
3667
3668 event.u.mlme.status = MLME_SUCCESS;
3669 info.success = 1;
3670 drv_event_callback(sdata->local, sdata, &event);
3671 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
3672 (auth_transaction == 2 &&
3673 ifmgd->auth_data->expected_transaction == 2)) {
3674 if (!ieee80211_mark_sta_auth(sdata))
3675 return; /* ignore frame -- wait for timeout */
3676 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
3677 auth_transaction == 2) {
3678 sdata_info(sdata, "SAE peer confirmed\n");
3679 ifmgd->auth_data->peer_confirmed = true;
3680 }
3681
3682 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3683 notify_driver:
3684 drv_mgd_complete_tx(sdata->local, sdata, &info);
3685 }
3686
3687 #define case_WLAN(type) \
3688 case WLAN_REASON_##type: return #type
3689
ieee80211_get_reason_code_string(u16 reason_code)3690 const char *ieee80211_get_reason_code_string(u16 reason_code)
3691 {
3692 switch (reason_code) {
3693 case_WLAN(UNSPECIFIED);
3694 case_WLAN(PREV_AUTH_NOT_VALID);
3695 case_WLAN(DEAUTH_LEAVING);
3696 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
3697 case_WLAN(DISASSOC_AP_BUSY);
3698 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
3699 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
3700 case_WLAN(DISASSOC_STA_HAS_LEFT);
3701 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
3702 case_WLAN(DISASSOC_BAD_POWER);
3703 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
3704 case_WLAN(INVALID_IE);
3705 case_WLAN(MIC_FAILURE);
3706 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
3707 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
3708 case_WLAN(IE_DIFFERENT);
3709 case_WLAN(INVALID_GROUP_CIPHER);
3710 case_WLAN(INVALID_PAIRWISE_CIPHER);
3711 case_WLAN(INVALID_AKMP);
3712 case_WLAN(UNSUPP_RSN_VERSION);
3713 case_WLAN(INVALID_RSN_IE_CAP);
3714 case_WLAN(IEEE8021X_FAILED);
3715 case_WLAN(CIPHER_SUITE_REJECTED);
3716 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
3717 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
3718 case_WLAN(DISASSOC_LOW_ACK);
3719 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
3720 case_WLAN(QSTA_LEAVE_QBSS);
3721 case_WLAN(QSTA_NOT_USE);
3722 case_WLAN(QSTA_REQUIRE_SETUP);
3723 case_WLAN(QSTA_TIMEOUT);
3724 case_WLAN(QSTA_CIPHER_NOT_SUPP);
3725 case_WLAN(MESH_PEER_CANCELED);
3726 case_WLAN(MESH_MAX_PEERS);
3727 case_WLAN(MESH_CONFIG);
3728 case_WLAN(MESH_CLOSE);
3729 case_WLAN(MESH_MAX_RETRIES);
3730 case_WLAN(MESH_CONFIRM_TIMEOUT);
3731 case_WLAN(MESH_INVALID_GTK);
3732 case_WLAN(MESH_INCONSISTENT_PARAM);
3733 case_WLAN(MESH_INVALID_SECURITY);
3734 case_WLAN(MESH_PATH_ERROR);
3735 case_WLAN(MESH_PATH_NOFORWARD);
3736 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
3737 case_WLAN(MAC_EXISTS_IN_MBSS);
3738 case_WLAN(MESH_CHAN_REGULATORY);
3739 case_WLAN(MESH_CHAN);
3740 default: return "<unknown>";
3741 }
3742 }
3743
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3744 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
3745 struct ieee80211_mgmt *mgmt, size_t len)
3746 {
3747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3748 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
3749
3750 sdata_assert_lock(sdata);
3751
3752 if (len < 24 + 2)
3753 return;
3754
3755 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3756 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3757 return;
3758 }
3759
3760 if (ifmgd->associated &&
3761 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
3762 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
3763 sdata->vif.cfg.ap_addr, reason_code,
3764 ieee80211_get_reason_code_string(reason_code));
3765
3766 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3767
3768 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
3769 reason_code, false);
3770 return;
3771 }
3772
3773 if (ifmgd->assoc_data &&
3774 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
3775 sdata_info(sdata,
3776 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
3777 ifmgd->assoc_data->ap_addr, reason_code,
3778 ieee80211_get_reason_code_string(reason_code));
3779
3780 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
3781
3782 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
3783 return;
3784 }
3785 }
3786
3787
ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)3788 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
3789 struct ieee80211_mgmt *mgmt, size_t len)
3790 {
3791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3792 u16 reason_code;
3793
3794 sdata_assert_lock(sdata);
3795
3796 if (len < 24 + 2)
3797 return;
3798
3799 if (!ifmgd->associated ||
3800 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
3801 return;
3802
3803 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
3804
3805 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
3806 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
3807 return;
3808 }
3809
3810 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
3811 sdata->vif.cfg.ap_addr, reason_code,
3812 ieee80211_get_reason_code_string(reason_code));
3813
3814 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
3815
3816 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
3817 false);
3818 }
3819
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,int shift)3820 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
3821 u8 *supp_rates, unsigned int supp_rates_len,
3822 u32 *rates, u32 *basic_rates,
3823 bool *have_higher_than_11mbit,
3824 int *min_rate, int *min_rate_index,
3825 int shift)
3826 {
3827 int i, j;
3828
3829 for (i = 0; i < supp_rates_len; i++) {
3830 int rate = supp_rates[i] & 0x7f;
3831 bool is_basic = !!(supp_rates[i] & 0x80);
3832
3833 if ((rate * 5 * (1 << shift)) > 110)
3834 *have_higher_than_11mbit = true;
3835
3836 /*
3837 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors
3838 * since they're not rates.
3839 *
3840 * Note: Even though the membership selector and the basic
3841 * rate flag share the same bit, they are not exactly
3842 * the same.
3843 */
3844 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
3845 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
3846 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
3847 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
3848 continue;
3849
3850 for (j = 0; j < sband->n_bitrates; j++) {
3851 struct ieee80211_rate *br;
3852 int brate;
3853
3854 br = &sband->bitrates[j];
3855
3856 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3857 if (brate == rate) {
3858 *rates |= BIT(j);
3859 if (is_basic)
3860 *basic_rates |= BIT(j);
3861 if ((rate * 5) < *min_rate) {
3862 *min_rate = rate * 5;
3863 *min_rate_index = j;
3864 }
3865 break;
3866 }
3867 }
3868 }
3869 }
3870
ieee80211_twt_req_supported(const struct link_sta_info * link_sta,const struct ieee802_11_elems * elems)3871 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta,
3872 const struct ieee802_11_elems *elems)
3873 {
3874 if (elems->ext_capab_len < 10)
3875 return false;
3876
3877 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
3878 return false;
3879
3880 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
3881 IEEE80211_HE_MAC_CAP0_TWT_RES;
3882 }
3883
ieee80211_recalc_twt_req(struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct ieee802_11_elems * elems)3884 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link,
3885 struct link_sta_info *link_sta,
3886 struct ieee802_11_elems *elems)
3887 {
3888 bool twt = ieee80211_twt_req_supported(link_sta, elems);
3889
3890 if (link->conf->twt_requester != twt) {
3891 link->conf->twt_requester = twt;
3892 return BSS_CHANGED_TWT;
3893 }
3894 return 0;
3895 }
3896
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)3897 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
3898 struct ieee80211_bss_conf *bss_conf,
3899 struct ieee80211_supported_band *sband,
3900 struct link_sta_info *link_sta)
3901 {
3902 const struct ieee80211_sta_he_cap *own_he_cap =
3903 ieee80211_get_he_iftype_cap(sband,
3904 ieee80211_vif_type_p2p(&sdata->vif));
3905
3906 return bss_conf->he_support &&
3907 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
3908 IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
3909 own_he_cap &&
3910 (own_he_cap->he_cap_elem.mac_cap_info[2] &
3911 IEEE80211_HE_MAC_CAP2_BCAST_TWT);
3912 }
3913
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)3914 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
3915 struct link_sta_info *link_sta,
3916 struct cfg80211_bss *cbss,
3917 struct ieee80211_mgmt *mgmt,
3918 const u8 *elem_start,
3919 unsigned int elem_len,
3920 u64 *changed)
3921 {
3922 struct ieee80211_sub_if_data *sdata = link->sdata;
3923 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3924 struct ieee80211_bss_conf *bss_conf = link->conf;
3925 struct ieee80211_local *local = sdata->local;
3926 struct ieee80211_elems_parse_params parse_params = {
3927 .start = elem_start,
3928 .len = elem_len,
3929 .bss = cbss,
3930 .link_id = link == &sdata->deflink ? -1 : link->link_id,
3931 .from_ap = true,
3932 };
3933 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
3934 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
3935 const struct cfg80211_bss_ies *bss_ies = NULL;
3936 struct ieee80211_supported_band *sband;
3937 struct ieee802_11_elems *elems;
3938 u16 capab_info;
3939 bool ret;
3940
3941 elems = ieee802_11_parse_elems_full(&parse_params);
3942 if (!elems)
3943 return false;
3944
3945 /* FIXME: use from STA profile element after parsing that */
3946 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3947
3948 if (!is_s1g && !elems->supp_rates) {
3949 sdata_info(sdata, "no SuppRates element in AssocResp\n");
3950 ret = false;
3951 goto out;
3952 }
3953
3954 link->u.mgd.tdls_chan_switch_prohibited =
3955 elems->ext_capab && elems->ext_capab_len >= 5 &&
3956 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
3957
3958 /*
3959 * Some APs are erroneously not including some information in their
3960 * (re)association response frames. Try to recover by using the data
3961 * from the beacon or probe response. This seems to afflict mobile
3962 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
3963 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
3964 */
3965 if (!is_6ghz &&
3966 ((assoc_data->wmm && !elems->wmm_param) ||
3967 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
3968 (!elems->ht_cap_elem || !elems->ht_operation)) ||
3969 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
3970 (!elems->vht_cap_elem || !elems->vht_operation)))) {
3971 const struct cfg80211_bss_ies *ies;
3972 struct ieee802_11_elems *bss_elems;
3973
3974 rcu_read_lock();
3975 ies = rcu_dereference(cbss->ies);
3976 if (ies)
3977 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
3978 GFP_ATOMIC);
3979 rcu_read_unlock();
3980 if (!bss_ies) {
3981 ret = false;
3982 goto out;
3983 }
3984
3985 parse_params.start = bss_ies->data;
3986 parse_params.len = bss_ies->len;
3987 bss_elems = ieee802_11_parse_elems_full(&parse_params);
3988 if (!bss_elems) {
3989 ret = false;
3990 goto out;
3991 }
3992
3993 if (assoc_data->wmm &&
3994 !elems->wmm_param && bss_elems->wmm_param) {
3995 elems->wmm_param = bss_elems->wmm_param;
3996 sdata_info(sdata,
3997 "AP bug: WMM param missing from AssocResp\n");
3998 }
3999
4000 /*
4001 * Also check if we requested HT/VHT, otherwise the AP doesn't
4002 * have to include the IEs in the (re)association response.
4003 */
4004 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4005 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4006 elems->ht_cap_elem = bss_elems->ht_cap_elem;
4007 sdata_info(sdata,
4008 "AP bug: HT capability missing from AssocResp\n");
4009 }
4010 if (!elems->ht_operation && bss_elems->ht_operation &&
4011 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) {
4012 elems->ht_operation = bss_elems->ht_operation;
4013 sdata_info(sdata,
4014 "AP bug: HT operation missing from AssocResp\n");
4015 }
4016 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4017 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4018 elems->vht_cap_elem = bss_elems->vht_cap_elem;
4019 sdata_info(sdata,
4020 "AP bug: VHT capa missing from AssocResp\n");
4021 }
4022 if (!elems->vht_operation && bss_elems->vht_operation &&
4023 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) {
4024 elems->vht_operation = bss_elems->vht_operation;
4025 sdata_info(sdata,
4026 "AP bug: VHT operation missing from AssocResp\n");
4027 }
4028
4029 kfree(bss_elems);
4030 }
4031
4032 /*
4033 * We previously checked these in the beacon/probe response, so
4034 * they should be present here. This is just a safety net.
4035 */
4036 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) &&
4037 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4038 sdata_info(sdata,
4039 "HT AP is missing WMM params or HT capability/operation\n");
4040 ret = false;
4041 goto out;
4042 }
4043
4044 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) &&
4045 (!elems->vht_cap_elem || !elems->vht_operation)) {
4046 sdata_info(sdata,
4047 "VHT AP is missing VHT capability/operation\n");
4048 ret = false;
4049 goto out;
4050 }
4051
4052 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4053 !elems->he_6ghz_capa) {
4054 sdata_info(sdata,
4055 "HE 6 GHz AP is missing HE 6 GHz band capability\n");
4056 ret = false;
4057 goto out;
4058 }
4059
4060 if (WARN_ON(!link->conf->chandef.chan)) {
4061 ret = false;
4062 goto out;
4063 }
4064 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band];
4065
4066 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4067 (!elems->he_cap || !elems->he_operation)) {
4068 sdata_info(sdata,
4069 "HE AP is missing HE capability/operation\n");
4070 ret = false;
4071 goto out;
4072 }
4073
4074 /* Set up internal HT/VHT capabilities */
4075 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT))
4076 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4077 elems->ht_cap_elem,
4078 link_sta);
4079
4080 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT))
4081 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4082 elems->vht_cap_elem,
4083 link_sta);
4084
4085 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
4086 elems->he_cap) {
4087 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4088 elems->he_cap,
4089 elems->he_cap_len,
4090 elems->he_6ghz_capa,
4091 link_sta);
4092
4093 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4094 if (elems->rsnx && elems->rsnx_len &&
4095 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4096 wiphy_ext_feature_isset(local->hw.wiphy,
4097 NL80211_EXT_FEATURE_PROTECTED_TWT))
4098 bss_conf->twt_protected = true;
4099 else
4100 bss_conf->twt_protected = false;
4101
4102 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
4103
4104 if (elems->eht_operation && elems->eht_cap &&
4105 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
4106 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4107 elems->he_cap,
4108 elems->he_cap_len,
4109 elems->eht_cap,
4110 elems->eht_cap_len,
4111 link_sta);
4112
4113 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4114 } else {
4115 bss_conf->eht_support = false;
4116 }
4117 } else {
4118 bss_conf->he_support = false;
4119 bss_conf->twt_requester = false;
4120 bss_conf->twt_protected = false;
4121 bss_conf->eht_support = false;
4122 }
4123
4124 bss_conf->twt_broadcast =
4125 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4126
4127 if (bss_conf->he_support) {
4128 bss_conf->he_bss_color.color =
4129 le32_get_bits(elems->he_operation->he_oper_params,
4130 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4131 bss_conf->he_bss_color.partial =
4132 le32_get_bits(elems->he_operation->he_oper_params,
4133 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4134 bss_conf->he_bss_color.enabled =
4135 !le32_get_bits(elems->he_operation->he_oper_params,
4136 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4137
4138 if (bss_conf->he_bss_color.enabled)
4139 *changed |= BSS_CHANGED_HE_BSS_COLOR;
4140
4141 bss_conf->htc_trig_based_pkt_ext =
4142 le32_get_bits(elems->he_operation->he_oper_params,
4143 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4144 bss_conf->frame_time_rts_th =
4145 le32_get_bits(elems->he_operation->he_oper_params,
4146 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4147
4148 bss_conf->uora_exists = !!elems->uora_element;
4149 if (elems->uora_element)
4150 bss_conf->uora_ocw_range = elems->uora_element[0];
4151
4152 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4153 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4154 /* TODO: OPEN: what happens if BSS color disable is set? */
4155 }
4156
4157 if (cbss->transmitted_bss) {
4158 bss_conf->nontransmitted = true;
4159 ether_addr_copy(bss_conf->transmitter_bssid,
4160 cbss->transmitted_bss->bssid);
4161 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4162 bss_conf->bssid_index = cbss->bssid_index;
4163 }
4164
4165 /*
4166 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4167 * in their association response, so ignore that data for our own
4168 * configuration. If it changed since the last beacon, we'll get the
4169 * next beacon and update then.
4170 */
4171
4172 /*
4173 * If an operating mode notification IE is present, override the
4174 * NSS calculation (that would be done in rate_control_rate_init())
4175 * and use the # of streams from that element.
4176 */
4177 if (elems->opmode_notif &&
4178 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4179 u8 nss;
4180
4181 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4182 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4183 nss += 1;
4184 link_sta->pub->rx_nss = nss;
4185 }
4186
4187 /*
4188 * Always handle WMM once after association regardless
4189 * of the first value the AP uses. Setting -1 here has
4190 * that effect because the AP values is an unsigned
4191 * 4-bit value.
4192 */
4193 link->u.mgd.wmm_last_param_set = -1;
4194 link->u.mgd.mu_edca_last_param_set = -1;
4195
4196 if (link->u.mgd.disable_wmm_tracking) {
4197 ieee80211_set_wmm_default(link, false, false);
4198 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4199 elems->wmm_param_len,
4200 elems->mu_edca_param_set)) {
4201 /* still enable QoS since we might have HT/VHT */
4202 ieee80211_set_wmm_default(link, false, true);
4203 /* disable WMM tracking in this case to disable
4204 * tracking WMM parameter changes in the beacon if
4205 * the parameters weren't actually valid. Doing so
4206 * avoids changing parameters very strangely when
4207 * the AP is going back and forth between valid and
4208 * invalid parameters.
4209 */
4210 link->u.mgd.disable_wmm_tracking = true;
4211 }
4212
4213 if (elems->max_idle_period_ie) {
4214 bss_conf->max_idle_period =
4215 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4216 bss_conf->protected_keep_alive =
4217 !!(elems->max_idle_period_ie->idle_options &
4218 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4219 *changed |= BSS_CHANGED_KEEP_ALIVE;
4220 } else {
4221 bss_conf->max_idle_period = 0;
4222 bss_conf->protected_keep_alive = false;
4223 }
4224
4225 /* set assoc capability (AID was already set earlier),
4226 * ieee80211_set_associated() will tell the driver */
4227 bss_conf->assoc_capability = capab_info;
4228
4229 ret = true;
4230 out:
4231 kfree(elems);
4232 kfree(bss_ies);
4233 return ret;
4234 }
4235
ieee80211_mgd_setup_link_sta(struct ieee80211_link_data * link,struct sta_info * sta,struct link_sta_info * link_sta,struct cfg80211_bss * cbss)4236 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
4237 struct sta_info *sta,
4238 struct link_sta_info *link_sta,
4239 struct cfg80211_bss *cbss)
4240 {
4241 struct ieee80211_sub_if_data *sdata = link->sdata;
4242 struct ieee80211_local *local = sdata->local;
4243 struct ieee80211_bss *bss = (void *)cbss->priv;
4244 u32 rates = 0, basic_rates = 0;
4245 bool have_higher_than_11mbit = false;
4246 int min_rate = INT_MAX, min_rate_index = -1;
4247 /* this is clearly wrong for MLO but we'll just remove it later */
4248 int shift = ieee80211_vif_get_shift(&sdata->vif);
4249 struct ieee80211_supported_band *sband;
4250
4251 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
4252 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
4253
4254 /* TODO: S1G Basic Rate Set is expressed elsewhere */
4255 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
4256 ieee80211_s1g_sta_rate_init(sta);
4257 return 0;
4258 }
4259
4260 sband = local->hw.wiphy->bands[cbss->channel->band];
4261
4262 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
4263 &rates, &basic_rates, &have_higher_than_11mbit,
4264 &min_rate, &min_rate_index, shift);
4265
4266 /*
4267 * This used to be a workaround for basic rates missing
4268 * in the association response frame. Now that we no
4269 * longer use the basic rates from there, it probably
4270 * doesn't happen any more, but keep the workaround so
4271 * in case some *other* APs are buggy in different ways
4272 * we can connect -- with a warning.
4273 * Allow this workaround only in case the AP provided at least
4274 * one rate.
4275 */
4276 if (min_rate_index < 0) {
4277 link_info(link, "No legacy rates in association response\n");
4278 return -EINVAL;
4279 } else if (!basic_rates) {
4280 link_info(link, "No basic rates, using min rate instead\n");
4281 basic_rates = BIT(min_rate_index);
4282 }
4283
4284 if (rates)
4285 link_sta->pub->supp_rates[cbss->channel->band] = rates;
4286 else
4287 link_info(link, "No rates found, keeping mandatory only\n");
4288
4289 link->conf->basic_rates = basic_rates;
4290
4291 /* cf. IEEE 802.11 9.2.12 */
4292 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
4293 have_higher_than_11mbit;
4294
4295 return 0;
4296 }
4297
ieee80211_max_rx_chains(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)4298 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
4299 struct cfg80211_bss *cbss)
4300 {
4301 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4302 const struct element *ht_cap_elem, *vht_cap_elem;
4303 const struct cfg80211_bss_ies *ies;
4304 const struct ieee80211_ht_cap *ht_cap;
4305 const struct ieee80211_vht_cap *vht_cap;
4306 const struct ieee80211_he_cap_elem *he_cap;
4307 const struct element *he_cap_elem;
4308 u16 mcs_80_map, mcs_160_map;
4309 int i, mcs_nss_size;
4310 bool support_160;
4311 u8 chains = 1;
4312
4313 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)
4314 return chains;
4315
4316 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
4317 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
4318 ht_cap = (void *)ht_cap_elem->data;
4319 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4320 /*
4321 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4322 * "Tx Unequal Modulation Supported" fields.
4323 */
4324 }
4325
4326 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)
4327 return chains;
4328
4329 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
4330 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
4331 u8 nss;
4332 u16 tx_mcs_map;
4333
4334 vht_cap = (void *)vht_cap_elem->data;
4335 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4336 for (nss = 8; nss > 0; nss--) {
4337 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4338 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4339 break;
4340 }
4341 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4342 chains = max(chains, nss);
4343 }
4344
4345 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE)
4346 return chains;
4347
4348 ies = rcu_dereference(cbss->ies);
4349 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4350 ies->data, ies->len);
4351
4352 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
4353 return chains;
4354
4355 /* skip one byte ext_tag_id */
4356 he_cap = (void *)(he_cap_elem->data + 1);
4357 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4358
4359 /* invalid HE IE */
4360 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
4361 return chains;
4362
4363 /* mcs_nss is right after he_cap info */
4364 he_mcs_nss_supp = (void *)(he_cap + 1);
4365
4366 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4367
4368 for (i = 7; i >= 0; i--) {
4369 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
4370
4371 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4372 chains = max_t(u8, chains, i + 1);
4373 break;
4374 }
4375 }
4376
4377 support_160 = he_cap->phy_cap_info[0] &
4378 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
4379
4380 if (!support_160)
4381 return chains;
4382
4383 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
4384 for (i = 7; i >= 0; i--) {
4385 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
4386
4387 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
4388 chains = max_t(u8, chains, i + 1);
4389 break;
4390 }
4391 }
4392
4393 return chains;
4394 }
4395
4396 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)4397 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4398 const struct cfg80211_bss_ies *ies,
4399 const struct ieee80211_he_operation *he_op)
4400 {
4401 const struct element *he_cap_elem;
4402 const struct ieee80211_he_cap_elem *he_cap;
4403 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
4404 u16 mcs_80_map_tx, mcs_80_map_rx;
4405 u16 ap_min_req_set;
4406 int mcs_nss_size;
4407 int nss;
4408
4409 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
4410 ies->data, ies->len);
4411
4412 if (!he_cap_elem)
4413 return false;
4414
4415 /* invalid HE IE */
4416 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
4417 sdata_info(sdata,
4418 "Invalid HE elem, Disable HE\n");
4419 return false;
4420 }
4421
4422 /* skip one byte ext_tag_id */
4423 he_cap = (void *)(he_cap_elem->data + 1);
4424 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
4425
4426 /* invalid HE IE */
4427 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
4428 sdata_info(sdata,
4429 "Invalid HE elem with nss size, Disable HE\n");
4430 return false;
4431 }
4432
4433 /* mcs_nss is right after he_cap info */
4434 he_mcs_nss_supp = (void *)(he_cap + 1);
4435
4436 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
4437 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
4438
4439 /* P802.11-REVme/D0.3
4440 * 27.1.1 Introduction to the HE PHY
4441 * ...
4442 * An HE STA shall support the following features:
4443 * ...
4444 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
4445 * supported channel widths for HE SU PPDUs
4446 */
4447 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4448 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
4449 sdata_info(sdata,
4450 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
4451 mcs_80_map_tx, mcs_80_map_rx);
4452 return false;
4453 }
4454
4455 if (!he_op)
4456 return true;
4457
4458 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4459
4460 /*
4461 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4462 * zeroes, which is nonsense, and completely inconsistent with itself
4463 * (it doesn't have 8 streams). Accept the settings in this case anyway.
4464 */
4465 if (!ap_min_req_set)
4466 return true;
4467
4468 /* make sure the AP is consistent with itself
4469 *
4470 * P802.11-REVme/D0.3
4471 * 26.17.1 Basic HE BSS operation
4472 *
4473 * A STA that is operating in an HE BSS shall be able to receive and
4474 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
4475 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
4476 * MLME-START.request primitive and shall be able to receive at each of
4477 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
4478 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
4479 * primitive
4480 */
4481 for (nss = 8; nss > 0; nss--) {
4482 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4483 u8 ap_rx_val;
4484 u8 ap_tx_val;
4485
4486 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4487 continue;
4488
4489 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
4490 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
4491
4492 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4493 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4494 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
4495 sdata_info(sdata,
4496 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
4497 nss, ap_rx_val, ap_rx_val, ap_op_val);
4498 return false;
4499 }
4500 }
4501
4502 return true;
4503 }
4504
4505 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)4506 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
4507 struct ieee80211_supported_band *sband,
4508 const struct ieee80211_he_operation *he_op)
4509 {
4510 const struct ieee80211_sta_he_cap *sta_he_cap =
4511 ieee80211_get_he_iftype_cap(sband,
4512 ieee80211_vif_type_p2p(&sdata->vif));
4513 u16 ap_min_req_set;
4514 int i;
4515
4516 if (!sta_he_cap || !he_op)
4517 return false;
4518
4519 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
4520
4521 /*
4522 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
4523 * zeroes, which is nonsense, and completely inconsistent with itself
4524 * (it doesn't have 8 streams). Accept the settings in this case anyway.
4525 */
4526 if (!ap_min_req_set)
4527 return true;
4528
4529 /* Need to go over for 80MHz, 160MHz and for 80+80 */
4530 for (i = 0; i < 3; i++) {
4531 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
4532 &sta_he_cap->he_mcs_nss_supp;
4533 u16 sta_mcs_map_rx =
4534 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
4535 u16 sta_mcs_map_tx =
4536 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
4537 u8 nss;
4538 bool verified = true;
4539
4540 /*
4541 * For each band there is a maximum of 8 spatial streams
4542 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
4543 * of 2 bits per NSS (1-8), with the values defined in enum
4544 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
4545 * capabilities aren't less than the AP's minimum requirements
4546 * for this HE BSS per SS.
4547 * It is enough to find one such band that meets the reqs.
4548 */
4549 for (nss = 8; nss > 0; nss--) {
4550 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
4551 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
4552 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
4553
4554 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
4555 continue;
4556
4557 /*
4558 * Make sure the HE AP doesn't require MCSs that aren't
4559 * supported by the client as required by spec
4560 *
4561 * P802.11-REVme/D0.3
4562 * 26.17.1 Basic HE BSS operation
4563 *
4564 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
4565 * a BSS, unless it supports (i.e., is able to both transmit and
4566 * receive using) all of the <HE-MCS, NSS> tuples in the basic
4567 * HE-MCS and NSS set.
4568 */
4569 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4570 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
4571 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
4572 verified = false;
4573 break;
4574 }
4575 }
4576
4577 if (verified)
4578 return true;
4579 }
4580
4581 /* If here, STA doesn't meet AP's HE min requirements */
4582 return false;
4583 }
4584
ieee80211_prep_channel(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,struct cfg80211_bss * cbss,ieee80211_conn_flags_t * conn_flags)4585 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4586 struct ieee80211_link_data *link,
4587 struct cfg80211_bss *cbss,
4588 ieee80211_conn_flags_t *conn_flags)
4589 {
4590 struct ieee80211_local *local = sdata->local;
4591 const struct ieee80211_ht_cap *ht_cap = NULL;
4592 const struct ieee80211_ht_operation *ht_oper = NULL;
4593 const struct ieee80211_vht_operation *vht_oper = NULL;
4594 const struct ieee80211_he_operation *he_oper = NULL;
4595 const struct ieee80211_eht_operation *eht_oper = NULL;
4596 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
4597 struct ieee80211_supported_band *sband;
4598 struct cfg80211_chan_def chandef;
4599 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4600 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4601 struct ieee80211_bss *bss = (void *)cbss->priv;
4602 struct ieee80211_elems_parse_params parse_params = {
4603 .bss = cbss,
4604 .link_id = -1,
4605 .from_ap = true,
4606 };
4607 struct ieee802_11_elems *elems;
4608 const struct cfg80211_bss_ies *ies;
4609 int ret;
4610 u32 i;
4611 bool have_80mhz;
4612
4613 rcu_read_lock();
4614
4615 ies = rcu_dereference(cbss->ies);
4616 parse_params.start = ies->data;
4617 parse_params.len = ies->len;
4618 elems = ieee802_11_parse_elems_full(&parse_params);
4619 if (!elems) {
4620 rcu_read_unlock();
4621 return -ENOMEM;
4622 }
4623
4624 sband = local->hw.wiphy->bands[cbss->channel->band];
4625
4626 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ |
4627 IEEE80211_CONN_DISABLE_80P80MHZ |
4628 IEEE80211_CONN_DISABLE_160MHZ);
4629
4630 /* disable HT/VHT/HE if we don't support them */
4631 if (!sband->ht_cap.ht_supported && !is_6ghz) {
4632 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
4633 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4634 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4635 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4636 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4637 }
4638
4639 if (!sband->vht_cap.vht_supported && is_5ghz) {
4640 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
4641 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4642 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4643 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4644 }
4645
4646 if (!ieee80211_get_he_iftype_cap(sband,
4647 ieee80211_vif_type_p2p(&sdata->vif))) {
4648 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
4649 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4650 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4651 }
4652
4653 if (!ieee80211_get_eht_iftype_cap(sband,
4654 ieee80211_vif_type_p2p(&sdata->vif))) {
4655 mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
4656 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4657 }
4658
4659 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) {
4660 ht_oper = elems->ht_operation;
4661 ht_cap = elems->ht_cap_elem;
4662
4663 if (!ht_cap) {
4664 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4665 ht_oper = NULL;
4666 }
4667 }
4668
4669 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) {
4670 vht_oper = elems->vht_operation;
4671 if (vht_oper && !ht_oper) {
4672 vht_oper = NULL;
4673 sdata_info(sdata,
4674 "AP advertised VHT without HT, disabling HT/VHT/HE\n");
4675 *conn_flags |= IEEE80211_CONN_DISABLE_HT;
4676 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4677 *conn_flags |= IEEE80211_CONN_DISABLE_HE;
4678 *conn_flags |= IEEE80211_CONN_DISABLE_EHT;
4679 }
4680
4681 if (!elems->vht_cap_elem) {
4682 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4683 vht_oper = NULL;
4684 }
4685 }
4686
4687 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) {
4688 he_oper = elems->he_operation;
4689
4690 if (link && is_6ghz) {
4691 struct ieee80211_bss_conf *bss_conf;
4692 u8 j = 0;
4693
4694 bss_conf = link->conf;
4695
4696 if (elems->pwr_constr_elem)
4697 bss_conf->pwr_reduction = *elems->pwr_constr_elem;
4698
4699 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
4700 ARRAY_SIZE(elems->tx_pwr_env));
4701
4702 for (i = 0; i < elems->tx_pwr_env_num; i++) {
4703 if (elems->tx_pwr_env_len[i] >
4704 sizeof(bss_conf->tx_pwr_env[j]))
4705 continue;
4706
4707 bss_conf->tx_pwr_env_num++;
4708 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
4709 elems->tx_pwr_env_len[i]);
4710 j++;
4711 }
4712 }
4713
4714 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
4715 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
4716 *conn_flags |= IEEE80211_CONN_DISABLE_HE |
4717 IEEE80211_CONN_DISABLE_EHT;
4718 }
4719
4720 /*
4721 * EHT requires HE to be supported as well. Specifically for 6 GHz
4722 * channels, the operation channel information can only be deduced from
4723 * both the 6 GHz operation information (from the HE operation IE) and
4724 * EHT operation.
4725 */
4726 if (!(*conn_flags &
4727 (IEEE80211_CONN_DISABLE_HE |
4728 IEEE80211_CONN_DISABLE_EHT)) &&
4729 he_oper) {
4730 const struct cfg80211_bss_ies *cbss_ies;
4731 const u8 *eht_oper_ie;
4732
4733 cbss_ies = rcu_dereference(cbss->ies);
4734 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
4735 cbss_ies->data, cbss_ies->len);
4736 if (eht_oper_ie && eht_oper_ie[1] >=
4737 1 + sizeof(struct ieee80211_eht_operation))
4738 eht_oper = (void *)(eht_oper_ie + 3);
4739 else
4740 eht_oper = NULL;
4741 }
4742
4743 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4744 have_80mhz = false;
4745 for (i = 0; i < sband->n_channels; i++) {
4746 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4747 IEEE80211_CHAN_NO_80MHZ))
4748 continue;
4749
4750 have_80mhz = true;
4751 break;
4752 }
4753
4754 if (!have_80mhz) {
4755 sdata_info(sdata, "80 MHz not supported, disabling VHT\n");
4756 *conn_flags |= IEEE80211_CONN_DISABLE_VHT;
4757 }
4758
4759 if (sband->band == NL80211_BAND_S1GHZ) {
4760 s1g_oper = elems->s1g_oper;
4761 if (!s1g_oper)
4762 sdata_info(sdata,
4763 "AP missing S1G operation element?\n");
4764 }
4765
4766 *conn_flags |=
4767 ieee80211_determine_chantype(sdata, link, *conn_flags,
4768 sband,
4769 cbss->channel,
4770 bss->vht_cap_info,
4771 ht_oper, vht_oper,
4772 he_oper, eht_oper,
4773 s1g_oper,
4774 &chandef, false);
4775
4776 if (link)
4777 link->needed_rx_chains =
4778 min(ieee80211_max_rx_chains(link, cbss),
4779 local->rx_chains);
4780
4781 rcu_read_unlock();
4782 /* the element data was RCU protected so no longer valid anyway */
4783 kfree(elems);
4784 elems = NULL;
4785
4786 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) {
4787 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
4788 return -EINVAL;
4789 }
4790
4791 if (!link)
4792 return 0;
4793
4794 /* will change later if needed */
4795 link->smps_mode = IEEE80211_SMPS_OFF;
4796
4797 mutex_lock(&local->mtx);
4798 /*
4799 * If this fails (possibly due to channel context sharing
4800 * on incompatible channels, e.g. 80+80 and 160 sharing the
4801 * same control channel) try to use a smaller bandwidth.
4802 */
4803 ret = ieee80211_link_use_channel(link, &chandef,
4804 IEEE80211_CHANCTX_SHARED);
4805
4806 /* don't downgrade for 5 and 10 MHz channels, though. */
4807 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4808 chandef.width == NL80211_CHAN_WIDTH_10)
4809 goto out;
4810
4811 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
4812 *conn_flags |=
4813 ieee80211_chandef_downgrade(&chandef);
4814 ret = ieee80211_link_use_channel(link, &chandef,
4815 IEEE80211_CHANCTX_SHARED);
4816 }
4817 out:
4818 mutex_unlock(&local->mtx);
4819 return ret;
4820 }
4821
ieee80211_get_dtim(const struct cfg80211_bss_ies * ies,u8 * dtim_count,u8 * dtim_period)4822 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
4823 u8 *dtim_count, u8 *dtim_period)
4824 {
4825 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
4826 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
4827 ies->len);
4828 const struct ieee80211_tim_ie *tim = NULL;
4829 const struct ieee80211_bssid_index *idx;
4830 bool valid = tim_ie && tim_ie[1] >= 2;
4831
4832 if (valid)
4833 tim = (void *)(tim_ie + 2);
4834
4835 if (dtim_count)
4836 *dtim_count = valid ? tim->dtim_count : 0;
4837
4838 if (dtim_period)
4839 *dtim_period = valid ? tim->dtim_period : 0;
4840
4841 /* Check if value is overridden by non-transmitted profile */
4842 if (!idx_ie || idx_ie[1] < 3)
4843 return valid;
4844
4845 idx = (void *)(idx_ie + 2);
4846
4847 if (dtim_count)
4848 *dtim_count = idx->dtim_count;
4849
4850 if (dtim_period)
4851 *dtim_period = idx->dtim_period;
4852
4853 return true;
4854 }
4855
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)4856 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
4857 struct ieee80211_mgmt *mgmt,
4858 struct ieee802_11_elems *elems,
4859 const u8 *elem_start, unsigned int elem_len)
4860 {
4861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4862 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
4863 struct ieee80211_local *local = sdata->local;
4864 unsigned int link_id;
4865 struct sta_info *sta;
4866 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
4867 int err;
4868
4869 mutex_lock(&sdata->local->sta_mtx);
4870 /*
4871 * station info was already allocated and inserted before
4872 * the association and should be available to us
4873 */
4874 sta = sta_info_get(sdata, assoc_data->ap_addr);
4875 if (WARN_ON(!sta))
4876 goto out_err;
4877
4878 if (sdata->vif.valid_links) {
4879 u16 valid_links = 0;
4880
4881 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4882 if (!assoc_data->link[link_id].bss)
4883 continue;
4884 valid_links |= BIT(link_id);
4885
4886 if (link_id != assoc_data->assoc_link_id) {
4887 err = ieee80211_sta_allocate_link(sta, link_id);
4888 if (err)
4889 goto out_err;
4890 }
4891 }
4892
4893 ieee80211_vif_set_links(sdata, valid_links);
4894 }
4895
4896 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4897 struct ieee80211_link_data *link;
4898 struct link_sta_info *link_sta;
4899
4900 if (!assoc_data->link[link_id].bss)
4901 continue;
4902
4903 link = sdata_dereference(sdata->link[link_id], sdata);
4904 if (WARN_ON(!link))
4905 goto out_err;
4906
4907 if (sdata->vif.valid_links)
4908 link_info(link,
4909 "local address %pM, AP link address %pM\n",
4910 link->conf->addr,
4911 assoc_data->link[link_id].bss->bssid);
4912
4913 link_sta = rcu_dereference_protected(sta->link[link_id],
4914 lockdep_is_held(&local->sta_mtx));
4915 if (WARN_ON(!link_sta))
4916 goto out_err;
4917
4918 if (link_id != assoc_data->assoc_link_id) {
4919 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4920 const struct cfg80211_bss_ies *ies;
4921
4922 rcu_read_lock();
4923 ies = rcu_dereference(cbss->ies);
4924 ieee80211_get_dtim(ies,
4925 &link->conf->sync_dtim_count,
4926 &link->u.mgd.dtim_period);
4927 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
4928 link->conf->beacon_int = cbss->beacon_interval;
4929 rcu_read_unlock();
4930
4931 err = ieee80211_prep_channel(sdata, link, cbss,
4932 &link->u.mgd.conn_flags);
4933 if (err) {
4934 link_info(link, "prep_channel failed\n");
4935 goto out_err;
4936 }
4937 }
4938
4939 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
4940 assoc_data->link[link_id].bss);
4941 if (err)
4942 goto out_err;
4943
4944 if (!ieee80211_assoc_config_link(link, link_sta,
4945 assoc_data->link[link_id].bss,
4946 mgmt, elem_start, elem_len,
4947 &changed[link_id]))
4948 goto out_err;
4949
4950 if (link_id != assoc_data->assoc_link_id) {
4951 err = ieee80211_sta_activate_link(sta, link_id);
4952 if (err)
4953 goto out_err;
4954 }
4955 }
4956
4957 rate_control_rate_init(sta);
4958
4959 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
4960 set_sta_flag(sta, WLAN_STA_MFP);
4961 sta->sta.mfp = true;
4962 } else {
4963 sta->sta.mfp = false;
4964 }
4965
4966 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
4967 elems->ext_capab_len);
4968
4969 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
4970 local->hw.queues >= IEEE80211_NUM_ACS;
4971
4972 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
4973 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
4974 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
4975 if (err) {
4976 sdata_info(sdata,
4977 "failed to move station %pM to desired state\n",
4978 sta->sta.addr);
4979 WARN_ON(__sta_info_destroy(sta));
4980 goto out_err;
4981 }
4982
4983 if (sdata->wdev.use_4addr)
4984 drv_sta_set_4addr(local, sdata, &sta->sta, true);
4985
4986 mutex_unlock(&sdata->local->sta_mtx);
4987
4988 ieee80211_set_associated(sdata, assoc_data, changed);
4989
4990 /*
4991 * If we're using 4-addr mode, let the AP know that we're
4992 * doing so, so that it can create the STA VLAN on its side
4993 */
4994 if (ifmgd->use_4addr)
4995 ieee80211_send_4addr_nullfunc(local, sdata);
4996
4997 /*
4998 * Start timer to probe the connection to the AP now.
4999 * Also start the timer that will detect beacon loss.
5000 */
5001 ieee80211_sta_reset_beacon_monitor(sdata);
5002 ieee80211_sta_reset_conn_monitor(sdata);
5003
5004 return true;
5005 out_err:
5006 eth_zero_addr(sdata->vif.cfg.ap_addr);
5007 mutex_unlock(&sdata->local->sta_mtx);
5008 return false;
5009 }
5010
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)5011 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5012 struct ieee80211_mgmt *mgmt,
5013 size_t len)
5014 {
5015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5016 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5017 u16 capab_info, status_code, aid;
5018 struct ieee80211_elems_parse_params parse_params = {
5019 .bss = NULL,
5020 .link_id = -1,
5021 .from_ap = true,
5022 };
5023 struct ieee802_11_elems *elems;
5024 int ac;
5025 const u8 *elem_start;
5026 unsigned int elem_len;
5027 bool reassoc;
5028 struct ieee80211_event event = {
5029 .type = MLME_EVENT,
5030 .u.mlme.data = ASSOC_EVENT,
5031 };
5032 struct ieee80211_prep_tx_info info = {};
5033 struct cfg80211_rx_assoc_resp resp = {
5034 .uapsd_queues = -1,
5035 };
5036 u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5037 unsigned int link_id;
5038
5039 sdata_assert_lock(sdata);
5040
5041 if (!assoc_data)
5042 return;
5043
5044 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5045 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5046 return;
5047
5048 /*
5049 * AssocResp and ReassocResp have identical structure, so process both
5050 * of them in this function.
5051 */
5052
5053 if (len < 24 + 6)
5054 return;
5055
5056 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5057 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5058 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5059 if (assoc_data->s1g)
5060 elem_start = mgmt->u.s1g_assoc_resp.variable;
5061 else
5062 elem_start = mgmt->u.assoc_resp.variable;
5063
5064 /*
5065 * Note: this may not be perfect, AP might misbehave - if
5066 * anyone needs to rely on perfect complete notification
5067 * with the exact right subtype, then we need to track what
5068 * we actually transmitted.
5069 */
5070 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5071 IEEE80211_STYPE_ASSOC_REQ;
5072
5073 if (assoc_data->fils_kek_len &&
5074 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5075 return;
5076
5077 elem_len = len - (elem_start - (u8 *)mgmt);
5078 parse_params.start = elem_start;
5079 parse_params.len = elem_len;
5080 elems = ieee802_11_parse_elems_full(&parse_params);
5081 if (!elems)
5082 goto notify_driver;
5083
5084 if (elems->aid_resp)
5085 aid = le16_to_cpu(elems->aid_resp->aid);
5086 else if (assoc_data->s1g)
5087 aid = 0; /* TODO */
5088 else
5089 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5090
5091 /*
5092 * The 5 MSB of the AID field are reserved
5093 * (802.11-2016 9.4.1.8 AID field)
5094 */
5095 aid &= 0x7ff;
5096
5097 sdata_info(sdata,
5098 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5099 reassoc ? "Rea" : "A", assoc_data->ap_addr,
5100 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5101
5102 ifmgd->broken_ap = false;
5103
5104 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5105 elems->timeout_int &&
5106 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5107 u32 tu, ms;
5108
5109 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5110 le32_to_cpu(elems->timeout_int->value));
5111
5112 tu = le32_to_cpu(elems->timeout_int->value);
5113 ms = tu * 1024 / 1000;
5114 sdata_info(sdata,
5115 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5116 assoc_data->ap_addr, tu, ms);
5117 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5118 assoc_data->timeout_started = true;
5119 if (ms > IEEE80211_ASSOC_TIMEOUT)
5120 run_again(sdata, assoc_data->timeout);
5121 goto notify_driver;
5122 }
5123
5124 if (status_code != WLAN_STATUS_SUCCESS) {
5125 sdata_info(sdata, "%pM denied association (code=%d)\n",
5126 assoc_data->ap_addr, status_code);
5127 event.u.mlme.status = MLME_DENIED;
5128 event.u.mlme.reason = status_code;
5129 drv_event_callback(sdata->local, sdata, &event);
5130 } else {
5131 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5132 sdata_info(sdata,
5133 "invalid AID value %d (out of range), turn off PS\n",
5134 aid);
5135 aid = 0;
5136 ifmgd->broken_ap = true;
5137 }
5138
5139 if (sdata->vif.valid_links) {
5140 if (!elems->multi_link) {
5141 sdata_info(sdata,
5142 "MLO association with %pM but no multi-link element in response!\n",
5143 assoc_data->ap_addr);
5144 goto abandon_assoc;
5145 }
5146
5147 if (le16_get_bits(elems->multi_link->control,
5148 IEEE80211_ML_CONTROL_TYPE) !=
5149 IEEE80211_ML_CONTROL_TYPE_BASIC) {
5150 sdata_info(sdata,
5151 "bad multi-link element (control=0x%x)\n",
5152 le16_to_cpu(elems->multi_link->control));
5153 goto abandon_assoc;
5154 } else {
5155 struct ieee80211_mle_basic_common_info *common;
5156
5157 common = (void *)elems->multi_link->variable;
5158
5159 if (memcmp(assoc_data->ap_addr,
5160 common->mld_mac_addr, ETH_ALEN)) {
5161 sdata_info(sdata,
5162 "AP MLD MAC address mismatch: got %pM expected %pM\n",
5163 common->mld_mac_addr,
5164 assoc_data->ap_addr);
5165 goto abandon_assoc;
5166 }
5167 }
5168 }
5169
5170 sdata->vif.cfg.aid = aid;
5171
5172 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5173 elem_start, elem_len)) {
5174 /* oops -- internal error -- send timeout for now */
5175 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5176 goto notify_driver;
5177 }
5178 event.u.mlme.status = MLME_SUCCESS;
5179 drv_event_callback(sdata->local, sdata, &event);
5180 sdata_info(sdata, "associated\n");
5181
5182 info.success = 1;
5183 }
5184
5185 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5186 struct ieee80211_link_data *link;
5187
5188 link = sdata_dereference(sdata->link[link_id], sdata);
5189 if (!link)
5190 continue;
5191 if (!assoc_data->link[link_id].bss)
5192 continue;
5193 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5194 resp.links[link_id].addr = link->conf->addr;
5195
5196 /* get uapsd queues configuration - same for all links */
5197 resp.uapsd_queues = 0;
5198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5199 if (link->tx_conf[ac].uapsd)
5200 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5201 }
5202
5203 if (sdata->vif.valid_links) {
5204 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5205 resp.ap_mld_addr = ap_mld_addr;
5206 }
5207
5208 ieee80211_destroy_assoc_data(sdata,
5209 status_code == WLAN_STATUS_SUCCESS ?
5210 ASSOC_SUCCESS :
5211 ASSOC_REJECTED);
5212
5213 resp.buf = (u8 *)mgmt;
5214 resp.len = len;
5215 resp.req_ies = ifmgd->assoc_req_ies;
5216 resp.req_ies_len = ifmgd->assoc_req_ies_len;
5217 cfg80211_rx_assoc_resp(sdata->dev, &resp);
5218 notify_driver:
5219 drv_mgd_complete_tx(sdata->local, sdata, &info);
5220 kfree(elems);
5221 return;
5222 abandon_assoc:
5223 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5224 goto notify_driver;
5225 }
5226
ieee80211_rx_bss_info(struct ieee80211_link_data * link,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)5227 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5228 struct ieee80211_mgmt *mgmt, size_t len,
5229 struct ieee80211_rx_status *rx_status)
5230 {
5231 struct ieee80211_sub_if_data *sdata = link->sdata;
5232 struct ieee80211_local *local = sdata->local;
5233 struct ieee80211_bss *bss;
5234 struct ieee80211_channel *channel;
5235
5236 sdata_assert_lock(sdata);
5237
5238 channel = ieee80211_get_channel_khz(local->hw.wiphy,
5239 ieee80211_rx_status_to_khz(rx_status));
5240 if (!channel)
5241 return;
5242
5243 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5244 if (bss) {
5245 link->conf->beacon_rate = bss->beacon_rate;
5246 ieee80211_rx_bss_put(local, bss);
5247 }
5248 }
5249
5250
ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data * link,struct sk_buff * skb)5251 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5252 struct sk_buff *skb)
5253 {
5254 struct ieee80211_sub_if_data *sdata = link->sdata;
5255 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5256 struct ieee80211_if_managed *ifmgd;
5257 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5258 struct ieee80211_channel *channel;
5259 size_t baselen, len = skb->len;
5260
5261 ifmgd = &sdata->u.mgd;
5262
5263 sdata_assert_lock(sdata);
5264
5265 /*
5266 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5267 * "If a 6 GHz AP receives a Probe Request frame and responds with
5268 * a Probe Response frame [..], the Address 1 field of the Probe
5269 * Response frame shall be set to the broadcast address [..]"
5270 * So, on 6GHz band we should also accept broadcast responses.
5271 */
5272 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5273 rx_status->freq);
5274 if (!channel)
5275 return;
5276
5277 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5278 (channel->band != NL80211_BAND_6GHZ ||
5279 !is_broadcast_ether_addr(mgmt->da)))
5280 return; /* ignore ProbeResp to foreign address */
5281
5282 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5283 if (baselen > len)
5284 return;
5285
5286 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5287
5288 if (ifmgd->associated &&
5289 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
5290 ieee80211_reset_ap_probe(sdata);
5291 }
5292
5293 /*
5294 * This is the canonical list of information elements we care about,
5295 * the filter code also gives us all changes to the Microsoft OUI
5296 * (00:50:F2) vendor IE which is used for WMM which we need to track,
5297 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
5298 * changes to requested client power.
5299 *
5300 * We implement beacon filtering in software since that means we can
5301 * avoid processing the frame here and in cfg80211, and userspace
5302 * will not be able to tell whether the hardware supports it or not.
5303 *
5304 * XXX: This list needs to be dynamic -- userspace needs to be able to
5305 * add items it requires. It also needs to be able to tell us to
5306 * look out for other vendor IEs.
5307 */
5308 static const u64 care_about_ies =
5309 (1ULL << WLAN_EID_COUNTRY) |
5310 (1ULL << WLAN_EID_ERP_INFO) |
5311 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
5312 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
5313 (1ULL << WLAN_EID_HT_CAPABILITY) |
5314 (1ULL << WLAN_EID_HT_OPERATION) |
5315 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
5316
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)5317 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
5318 struct ieee80211_if_managed *ifmgd,
5319 struct ieee80211_bss_conf *bss_conf,
5320 struct ieee80211_local *local,
5321 struct ieee80211_rx_status *rx_status)
5322 {
5323 struct ieee80211_sub_if_data *sdata = link->sdata;
5324
5325 /* Track average RSSI from the Beacon frames of the current AP */
5326
5327 if (!link->u.mgd.tracking_signal_avg) {
5328 link->u.mgd.tracking_signal_avg = true;
5329 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
5330 link->u.mgd.last_cqm_event_signal = 0;
5331 link->u.mgd.count_beacon_signal = 1;
5332 link->u.mgd.last_ave_beacon_signal = 0;
5333 } else {
5334 link->u.mgd.count_beacon_signal++;
5335 }
5336
5337 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
5338 -rx_status->signal);
5339
5340 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
5341 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5342 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5343 int last_sig = link->u.mgd.last_ave_beacon_signal;
5344 struct ieee80211_event event = {
5345 .type = RSSI_EVENT,
5346 };
5347
5348 /*
5349 * if signal crosses either of the boundaries, invoke callback
5350 * with appropriate parameters
5351 */
5352 if (sig > ifmgd->rssi_max_thold &&
5353 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
5354 link->u.mgd.last_ave_beacon_signal = sig;
5355 event.u.rssi.data = RSSI_EVENT_HIGH;
5356 drv_event_callback(local, sdata, &event);
5357 } else if (sig < ifmgd->rssi_min_thold &&
5358 (last_sig >= ifmgd->rssi_max_thold ||
5359 last_sig == 0)) {
5360 link->u.mgd.last_ave_beacon_signal = sig;
5361 event.u.rssi.data = RSSI_EVENT_LOW;
5362 drv_event_callback(local, sdata, &event);
5363 }
5364 }
5365
5366 if (bss_conf->cqm_rssi_thold &&
5367 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
5368 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
5369 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5370 int last_event = link->u.mgd.last_cqm_event_signal;
5371 int thold = bss_conf->cqm_rssi_thold;
5372 int hyst = bss_conf->cqm_rssi_hyst;
5373
5374 if (sig < thold &&
5375 (last_event == 0 || sig < last_event - hyst)) {
5376 link->u.mgd.last_cqm_event_signal = sig;
5377 ieee80211_cqm_rssi_notify(
5378 &sdata->vif,
5379 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5380 sig, GFP_KERNEL);
5381 } else if (sig > thold &&
5382 (last_event == 0 || sig > last_event + hyst)) {
5383 link->u.mgd.last_cqm_event_signal = sig;
5384 ieee80211_cqm_rssi_notify(
5385 &sdata->vif,
5386 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5387 sig, GFP_KERNEL);
5388 }
5389 }
5390
5391 if (bss_conf->cqm_rssi_low &&
5392 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
5393 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
5394 int last_event = link->u.mgd.last_cqm_event_signal;
5395 int low = bss_conf->cqm_rssi_low;
5396 int high = bss_conf->cqm_rssi_high;
5397
5398 if (sig < low &&
5399 (last_event == 0 || last_event >= low)) {
5400 link->u.mgd.last_cqm_event_signal = sig;
5401 ieee80211_cqm_rssi_notify(
5402 &sdata->vif,
5403 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
5404 sig, GFP_KERNEL);
5405 } else if (sig > high &&
5406 (last_event == 0 || last_event <= high)) {
5407 link->u.mgd.last_cqm_event_signal = sig;
5408 ieee80211_cqm_rssi_notify(
5409 &sdata->vif,
5410 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
5411 sig, GFP_KERNEL);
5412 }
5413 }
5414 }
5415
ieee80211_rx_our_beacon(const u8 * tx_bssid,struct cfg80211_bss * bss)5416 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
5417 struct cfg80211_bss *bss)
5418 {
5419 if (ether_addr_equal(tx_bssid, bss->bssid))
5420 return true;
5421 if (!bss->transmitted_bss)
5422 return false;
5423 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
5424 }
5425
ieee80211_rx_mgmt_beacon(struct ieee80211_link_data * link,struct ieee80211_hdr * hdr,size_t len,struct ieee80211_rx_status * rx_status)5426 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
5427 struct ieee80211_hdr *hdr, size_t len,
5428 struct ieee80211_rx_status *rx_status)
5429 {
5430 struct ieee80211_sub_if_data *sdata = link->sdata;
5431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5432 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
5433 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
5434 struct ieee80211_mgmt *mgmt = (void *) hdr;
5435 size_t baselen;
5436 struct ieee802_11_elems *elems;
5437 struct ieee80211_local *local = sdata->local;
5438 struct ieee80211_chanctx_conf *chanctx_conf;
5439 struct ieee80211_channel *chan;
5440 struct link_sta_info *link_sta;
5441 struct sta_info *sta;
5442 u32 changed = 0;
5443 bool erp_valid;
5444 u8 erp_value = 0;
5445 u32 ncrc = 0;
5446 u8 *bssid, *variable = mgmt->u.beacon.variable;
5447 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
5448 struct ieee80211_elems_parse_params parse_params = {
5449 .link_id = -1,
5450 .from_ap = true,
5451 };
5452
5453 sdata_assert_lock(sdata);
5454
5455 /* Process beacon from the current BSS */
5456 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
5457 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
5458 struct ieee80211_ext *ext = (void *) mgmt;
5459
5460 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
5461 variable = ext->u.s1g_short_beacon.variable;
5462 else
5463 variable = ext->u.s1g_beacon.variable;
5464 }
5465
5466 baselen = (u8 *) variable - (u8 *) mgmt;
5467 if (baselen > len)
5468 return;
5469
5470 parse_params.start = variable;
5471 parse_params.len = len - baselen;
5472
5473 rcu_read_lock();
5474 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
5475 if (!chanctx_conf) {
5476 rcu_read_unlock();
5477 return;
5478 }
5479
5480 if (ieee80211_rx_status_to_khz(rx_status) !=
5481 ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
5482 rcu_read_unlock();
5483 return;
5484 }
5485 chan = chanctx_conf->def.chan;
5486 rcu_read_unlock();
5487
5488 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
5489 !WARN_ON(sdata->vif.valid_links) &&
5490 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
5491 parse_params.bss = ifmgd->assoc_data->link[0].bss;
5492 elems = ieee802_11_parse_elems_full(&parse_params);
5493 if (!elems)
5494 return;
5495
5496 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5497
5498 if (elems->dtim_period)
5499 link->u.mgd.dtim_period = elems->dtim_period;
5500 link->u.mgd.have_beacon = true;
5501 ifmgd->assoc_data->need_beacon = false;
5502 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
5503 link->conf->sync_tsf =
5504 le64_to_cpu(mgmt->u.beacon.timestamp);
5505 link->conf->sync_device_ts =
5506 rx_status->device_timestamp;
5507 link->conf->sync_dtim_count = elems->dtim_count;
5508 }
5509
5510 if (elems->mbssid_config_ie)
5511 bss_conf->profile_periodicity =
5512 elems->mbssid_config_ie->profile_periodicity;
5513 else
5514 bss_conf->profile_periodicity = 0;
5515
5516 if (elems->ext_capab_len >= 11 &&
5517 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
5518 bss_conf->ema_ap = true;
5519 else
5520 bss_conf->ema_ap = false;
5521
5522 /* continue assoc process */
5523 ifmgd->assoc_data->timeout = jiffies;
5524 ifmgd->assoc_data->timeout_started = true;
5525 run_again(sdata, ifmgd->assoc_data->timeout);
5526 kfree(elems);
5527 return;
5528 }
5529
5530 if (!ifmgd->associated ||
5531 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss))
5532 return;
5533 bssid = link->u.mgd.bssid;
5534
5535 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
5536 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
5537 local, rx_status);
5538
5539 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
5540 mlme_dbg_ratelimited(sdata,
5541 "cancelling AP probe due to a received beacon\n");
5542 ieee80211_reset_ap_probe(sdata);
5543 }
5544
5545 /*
5546 * Push the beacon loss detection into the future since
5547 * we are processing a beacon from the AP just now.
5548 */
5549 ieee80211_sta_reset_beacon_monitor(sdata);
5550
5551 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
5552 * element (which carries the beacon interval). Don't forget to add a
5553 * bit to care_about_ies[] above if mac80211 is interested in a
5554 * changing S1G element.
5555 */
5556 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5557 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
5558 parse_params.bss = link->u.mgd.bss;
5559 parse_params.filter = care_about_ies;
5560 parse_params.crc = ncrc;
5561 elems = ieee802_11_parse_elems_full(&parse_params);
5562 if (!elems)
5563 return;
5564 ncrc = elems->crc;
5565
5566 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
5567 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
5568 if (local->hw.conf.dynamic_ps_timeout > 0) {
5569 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
5570 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
5571 ieee80211_hw_config(local,
5572 IEEE80211_CONF_CHANGE_PS);
5573 }
5574 ieee80211_send_nullfunc(local, sdata, false);
5575 } else if (!local->pspolling && sdata->u.mgd.powersave) {
5576 local->pspolling = true;
5577
5578 /*
5579 * Here is assumed that the driver will be
5580 * able to send ps-poll frame and receive a
5581 * response even though power save mode is
5582 * enabled, but some drivers might require
5583 * to disable power save here. This needs
5584 * to be investigated.
5585 */
5586 ieee80211_send_pspoll(local, sdata);
5587 }
5588 }
5589
5590 if (sdata->vif.p2p ||
5591 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
5592 struct ieee80211_p2p_noa_attr noa = {};
5593 int ret;
5594
5595 ret = cfg80211_get_p2p_attr(variable,
5596 len - baselen,
5597 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
5598 (u8 *) &noa, sizeof(noa));
5599 if (ret >= 2) {
5600 if (link->u.mgd.p2p_noa_index != noa.index) {
5601 /* valid noa_attr and index changed */
5602 link->u.mgd.p2p_noa_index = noa.index;
5603 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
5604 changed |= BSS_CHANGED_P2P_PS;
5605 /*
5606 * make sure we update all information, the CRC
5607 * mechanism doesn't look at P2P attributes.
5608 */
5609 link->u.mgd.beacon_crc_valid = false;
5610 }
5611 } else if (link->u.mgd.p2p_noa_index != -1) {
5612 /* noa_attr not found and we had valid noa_attr before */
5613 link->u.mgd.p2p_noa_index = -1;
5614 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
5615 changed |= BSS_CHANGED_P2P_PS;
5616 link->u.mgd.beacon_crc_valid = false;
5617 }
5618 }
5619
5620 if (link->u.mgd.csa_waiting_bcn)
5621 ieee80211_chswitch_post_beacon(link);
5622
5623 /*
5624 * Update beacon timing and dtim count on every beacon appearance. This
5625 * will allow the driver to use the most updated values. Do it before
5626 * comparing this one with last received beacon.
5627 * IMPORTANT: These parameters would possibly be out of sync by the time
5628 * the driver will use them. The synchronized view is currently
5629 * guaranteed only in certain callbacks.
5630 */
5631 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
5632 !ieee80211_is_s1g_beacon(hdr->frame_control)) {
5633 link->conf->sync_tsf =
5634 le64_to_cpu(mgmt->u.beacon.timestamp);
5635 link->conf->sync_device_ts =
5636 rx_status->device_timestamp;
5637 link->conf->sync_dtim_count = elems->dtim_count;
5638 }
5639
5640 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
5641 ieee80211_is_s1g_short_beacon(mgmt->frame_control))
5642 goto free;
5643 link->u.mgd.beacon_crc = ncrc;
5644 link->u.mgd.beacon_crc_valid = true;
5645
5646 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5647
5648 ieee80211_sta_process_chanswitch(link, rx_status->mactime,
5649 rx_status->device_timestamp,
5650 elems, true);
5651
5652 if (!link->u.mgd.disable_wmm_tracking &&
5653 ieee80211_sta_wmm_params(local, link, elems->wmm_param,
5654 elems->wmm_param_len,
5655 elems->mu_edca_param_set))
5656 changed |= BSS_CHANGED_QOS;
5657
5658 /*
5659 * If we haven't had a beacon before, tell the driver about the
5660 * DTIM period (and beacon timing if desired) now.
5661 */
5662 if (!link->u.mgd.have_beacon) {
5663 /* a few bogus AP send dtim_period = 0 or no TIM IE */
5664 bss_conf->dtim_period = elems->dtim_period ?: 1;
5665
5666 changed |= BSS_CHANGED_BEACON_INFO;
5667 link->u.mgd.have_beacon = true;
5668
5669 mutex_lock(&local->iflist_mtx);
5670 ieee80211_recalc_ps(local);
5671 mutex_unlock(&local->iflist_mtx);
5672
5673 ieee80211_recalc_ps_vif(sdata);
5674 }
5675
5676 if (elems->erp_info) {
5677 erp_valid = true;
5678 erp_value = elems->erp_info[0];
5679 } else {
5680 erp_valid = false;
5681 }
5682
5683 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
5684 changed |= ieee80211_handle_bss_capability(link,
5685 le16_to_cpu(mgmt->u.beacon.capab_info),
5686 erp_valid, erp_value);
5687
5688 mutex_lock(&local->sta_mtx);
5689 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
5690 if (WARN_ON(!sta)) {
5691 mutex_unlock(&local->sta_mtx);
5692 goto free;
5693 }
5694 link_sta = rcu_dereference_protected(sta->link[link->link_id],
5695 lockdep_is_held(&local->sta_mtx));
5696 if (WARN_ON(!link_sta)) {
5697 mutex_unlock(&local->sta_mtx);
5698 goto free;
5699 }
5700
5701 changed |= ieee80211_recalc_twt_req(link, link_sta, elems);
5702
5703 if (ieee80211_config_bw(link, elems->ht_cap_elem,
5704 elems->vht_cap_elem, elems->ht_operation,
5705 elems->vht_operation, elems->he_operation,
5706 elems->eht_operation,
5707 elems->s1g_oper, bssid, &changed)) {
5708 mutex_unlock(&local->sta_mtx);
5709 sdata_info(sdata,
5710 "failed to follow AP %pM bandwidth change, disconnect\n",
5711 bssid);
5712 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5713 WLAN_REASON_DEAUTH_LEAVING,
5714 true, deauth_buf);
5715 ieee80211_report_disconnect(sdata, deauth_buf,
5716 sizeof(deauth_buf), true,
5717 WLAN_REASON_DEAUTH_LEAVING,
5718 false);
5719 goto free;
5720 }
5721
5722 if (sta && elems->opmode_notif)
5723 ieee80211_vht_handle_opmode(sdata, link_sta,
5724 *elems->opmode_notif,
5725 rx_status->band);
5726 mutex_unlock(&local->sta_mtx);
5727
5728 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
5729 elems->country_elem,
5730 elems->country_elem_len,
5731 elems->pwr_constr_elem,
5732 elems->cisco_dtpc_elem);
5733
5734 ieee80211_link_info_change_notify(sdata, link, changed);
5735 free:
5736 kfree(elems);
5737 }
5738
ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)5739 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
5740 struct sk_buff *skb)
5741 {
5742 struct ieee80211_link_data *link = &sdata->deflink;
5743 struct ieee80211_rx_status *rx_status;
5744 struct ieee80211_hdr *hdr;
5745 u16 fc;
5746
5747 rx_status = (struct ieee80211_rx_status *) skb->cb;
5748 hdr = (struct ieee80211_hdr *) skb->data;
5749 fc = le16_to_cpu(hdr->frame_control);
5750
5751 sdata_lock(sdata);
5752 switch (fc & IEEE80211_FCTL_STYPE) {
5753 case IEEE80211_STYPE_S1G_BEACON:
5754 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
5755 break;
5756 }
5757 sdata_unlock(sdata);
5758 }
5759
ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)5760 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
5761 struct sk_buff *skb)
5762 {
5763 struct ieee80211_link_data *link = &sdata->deflink;
5764 struct ieee80211_rx_status *rx_status;
5765 struct ieee80211_mgmt *mgmt;
5766 u16 fc;
5767 int ies_len;
5768
5769 rx_status = (struct ieee80211_rx_status *) skb->cb;
5770 mgmt = (struct ieee80211_mgmt *) skb->data;
5771 fc = le16_to_cpu(mgmt->frame_control);
5772
5773 sdata_lock(sdata);
5774
5775 if (rx_status->link_valid) {
5776 link = sdata_dereference(sdata->link[rx_status->link_id],
5777 sdata);
5778 if (!link)
5779 goto out;
5780 }
5781
5782 switch (fc & IEEE80211_FCTL_STYPE) {
5783 case IEEE80211_STYPE_BEACON:
5784 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
5785 skb->len, rx_status);
5786 break;
5787 case IEEE80211_STYPE_PROBE_RESP:
5788 ieee80211_rx_mgmt_probe_resp(link, skb);
5789 break;
5790 case IEEE80211_STYPE_AUTH:
5791 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
5792 break;
5793 case IEEE80211_STYPE_DEAUTH:
5794 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
5795 break;
5796 case IEEE80211_STYPE_DISASSOC:
5797 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
5798 break;
5799 case IEEE80211_STYPE_ASSOC_RESP:
5800 case IEEE80211_STYPE_REASSOC_RESP:
5801 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
5802 break;
5803 case IEEE80211_STYPE_ACTION:
5804 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
5805 struct ieee802_11_elems *elems;
5806
5807 ies_len = skb->len -
5808 offsetof(struct ieee80211_mgmt,
5809 u.action.u.chan_switch.variable);
5810
5811 if (ies_len < 0)
5812 break;
5813
5814 /* CSA IE cannot be overridden, no need for BSSID */
5815 elems = ieee802_11_parse_elems(
5816 mgmt->u.action.u.chan_switch.variable,
5817 ies_len, true, NULL);
5818
5819 if (elems && !elems->parse_error)
5820 ieee80211_sta_process_chanswitch(link,
5821 rx_status->mactime,
5822 rx_status->device_timestamp,
5823 elems, false);
5824 kfree(elems);
5825 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
5826 struct ieee802_11_elems *elems;
5827
5828 ies_len = skb->len -
5829 offsetof(struct ieee80211_mgmt,
5830 u.action.u.ext_chan_switch.variable);
5831
5832 if (ies_len < 0)
5833 break;
5834
5835 /*
5836 * extended CSA IE can't be overridden, no need for
5837 * BSSID
5838 */
5839 elems = ieee802_11_parse_elems(
5840 mgmt->u.action.u.ext_chan_switch.variable,
5841 ies_len, true, NULL);
5842
5843 if (elems && !elems->parse_error) {
5844 /* for the handling code pretend it was an IE */
5845 elems->ext_chansw_ie =
5846 &mgmt->u.action.u.ext_chan_switch.data;
5847
5848 ieee80211_sta_process_chanswitch(link,
5849 rx_status->mactime,
5850 rx_status->device_timestamp,
5851 elems, false);
5852 }
5853
5854 kfree(elems);
5855 }
5856 break;
5857 }
5858 out:
5859 sdata_unlock(sdata);
5860 }
5861
ieee80211_sta_timer(struct timer_list * t)5862 static void ieee80211_sta_timer(struct timer_list *t)
5863 {
5864 struct ieee80211_sub_if_data *sdata =
5865 from_timer(sdata, t, u.mgd.timer);
5866
5867 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
5868 }
5869
ieee80211_sta_connection_lost(struct ieee80211_sub_if_data * sdata,u8 reason,bool tx)5870 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
5871 u8 reason, bool tx)
5872 {
5873 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
5874
5875 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
5876 tx, frame_buf);
5877
5878 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5879 reason, false);
5880 }
5881
ieee80211_auth(struct ieee80211_sub_if_data * sdata)5882 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
5883 {
5884 struct ieee80211_local *local = sdata->local;
5885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5886 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
5887 u32 tx_flags = 0;
5888 u16 trans = 1;
5889 u16 status = 0;
5890 struct ieee80211_prep_tx_info info = {
5891 .subtype = IEEE80211_STYPE_AUTH,
5892 };
5893
5894 sdata_assert_lock(sdata);
5895
5896 if (WARN_ON_ONCE(!auth_data))
5897 return -EINVAL;
5898
5899 auth_data->tries++;
5900
5901 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
5902 sdata_info(sdata, "authentication with %pM timed out\n",
5903 auth_data->ap_addr);
5904
5905 /*
5906 * Most likely AP is not in the range so remove the
5907 * bss struct for that AP.
5908 */
5909 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
5910
5911 return -ETIMEDOUT;
5912 }
5913
5914 if (auth_data->algorithm == WLAN_AUTH_SAE)
5915 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
5916
5917 drv_mgd_prepare_tx(local, sdata, &info);
5918
5919 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
5920 auth_data->ap_addr, auth_data->tries,
5921 IEEE80211_AUTH_MAX_TRIES);
5922
5923 auth_data->expected_transaction = 2;
5924
5925 if (auth_data->algorithm == WLAN_AUTH_SAE) {
5926 trans = auth_data->sae_trans;
5927 status = auth_data->sae_status;
5928 auth_data->expected_transaction = trans;
5929 }
5930
5931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
5932 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
5933 IEEE80211_TX_INTFL_MLME_CONN_TX;
5934
5935 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
5936 auth_data->data, auth_data->data_len,
5937 auth_data->ap_addr, auth_data->ap_addr,
5938 NULL, 0, 0, tx_flags);
5939
5940 if (tx_flags == 0) {
5941 if (auth_data->algorithm == WLAN_AUTH_SAE)
5942 auth_data->timeout = jiffies +
5943 IEEE80211_AUTH_TIMEOUT_SAE;
5944 else
5945 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
5946 } else {
5947 auth_data->timeout =
5948 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
5949 }
5950
5951 auth_data->timeout_started = true;
5952 run_again(sdata, auth_data->timeout);
5953
5954 return 0;
5955 }
5956
ieee80211_do_assoc(struct ieee80211_sub_if_data * sdata)5957 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
5958 {
5959 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
5960 struct ieee80211_local *local = sdata->local;
5961 int ret;
5962
5963 sdata_assert_lock(sdata);
5964
5965 assoc_data->tries++;
5966 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
5967 sdata_info(sdata, "association with %pM timed out\n",
5968 assoc_data->ap_addr);
5969
5970 /*
5971 * Most likely AP is not in the range so remove the
5972 * bss struct for that AP.
5973 */
5974 cfg80211_unlink_bss(local->hw.wiphy,
5975 assoc_data->link[assoc_data->assoc_link_id].bss);
5976
5977 return -ETIMEDOUT;
5978 }
5979
5980 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
5981 assoc_data->ap_addr, assoc_data->tries,
5982 IEEE80211_ASSOC_MAX_TRIES);
5983 ret = ieee80211_send_assoc(sdata);
5984 if (ret)
5985 return ret;
5986
5987 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
5988 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
5989 assoc_data->timeout_started = true;
5990 run_again(sdata, assoc_data->timeout);
5991 } else {
5992 assoc_data->timeout =
5993 round_jiffies_up(jiffies +
5994 IEEE80211_ASSOC_TIMEOUT_LONG);
5995 assoc_data->timeout_started = true;
5996 run_again(sdata, assoc_data->timeout);
5997 }
5998
5999 return 0;
6000 }
6001
ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data * sdata,__le16 fc,bool acked)6002 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
6003 __le16 fc, bool acked)
6004 {
6005 struct ieee80211_local *local = sdata->local;
6006
6007 sdata->u.mgd.status_fc = fc;
6008 sdata->u.mgd.status_acked = acked;
6009 sdata->u.mgd.status_received = true;
6010
6011 ieee80211_queue_work(&local->hw, &sdata->work);
6012 }
6013
ieee80211_sta_work(struct ieee80211_sub_if_data * sdata)6014 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
6015 {
6016 struct ieee80211_local *local = sdata->local;
6017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6018
6019 sdata_lock(sdata);
6020
6021 if (ifmgd->status_received) {
6022 __le16 fc = ifmgd->status_fc;
6023 bool status_acked = ifmgd->status_acked;
6024
6025 ifmgd->status_received = false;
6026 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
6027 if (status_acked) {
6028 if (ifmgd->auth_data->algorithm ==
6029 WLAN_AUTH_SAE)
6030 ifmgd->auth_data->timeout =
6031 jiffies +
6032 IEEE80211_AUTH_TIMEOUT_SAE;
6033 else
6034 ifmgd->auth_data->timeout =
6035 jiffies +
6036 IEEE80211_AUTH_TIMEOUT_SHORT;
6037 run_again(sdata, ifmgd->auth_data->timeout);
6038 } else {
6039 ifmgd->auth_data->timeout = jiffies - 1;
6040 }
6041 ifmgd->auth_data->timeout_started = true;
6042 } else if (ifmgd->assoc_data &&
6043 (ieee80211_is_assoc_req(fc) ||
6044 ieee80211_is_reassoc_req(fc))) {
6045 if (status_acked) {
6046 ifmgd->assoc_data->timeout =
6047 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
6048 run_again(sdata, ifmgd->assoc_data->timeout);
6049 } else {
6050 ifmgd->assoc_data->timeout = jiffies - 1;
6051 }
6052 ifmgd->assoc_data->timeout_started = true;
6053 }
6054 }
6055
6056 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
6057 time_after(jiffies, ifmgd->auth_data->timeout)) {
6058 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
6059 /*
6060 * ok ... we waited for assoc or continuation but
6061 * userspace didn't do it, so kill the auth data
6062 */
6063 ieee80211_destroy_auth_data(sdata, false);
6064 } else if (ieee80211_auth(sdata)) {
6065 u8 ap_addr[ETH_ALEN];
6066 struct ieee80211_event event = {
6067 .type = MLME_EVENT,
6068 .u.mlme.data = AUTH_EVENT,
6069 .u.mlme.status = MLME_TIMEOUT,
6070 };
6071
6072 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
6073
6074 ieee80211_destroy_auth_data(sdata, false);
6075
6076 cfg80211_auth_timeout(sdata->dev, ap_addr);
6077 drv_event_callback(sdata->local, sdata, &event);
6078 }
6079 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
6080 run_again(sdata, ifmgd->auth_data->timeout);
6081
6082 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
6083 time_after(jiffies, ifmgd->assoc_data->timeout)) {
6084 if ((ifmgd->assoc_data->need_beacon &&
6085 !sdata->deflink.u.mgd.have_beacon) ||
6086 ieee80211_do_assoc(sdata)) {
6087 struct ieee80211_event event = {
6088 .type = MLME_EVENT,
6089 .u.mlme.data = ASSOC_EVENT,
6090 .u.mlme.status = MLME_TIMEOUT,
6091 };
6092
6093 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
6094 drv_event_callback(sdata->local, sdata, &event);
6095 }
6096 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
6097 run_again(sdata, ifmgd->assoc_data->timeout);
6098
6099 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
6100 ifmgd->associated) {
6101 u8 *bssid = sdata->deflink.u.mgd.bssid;
6102 int max_tries;
6103
6104 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6105 max_tries = max_nullfunc_tries;
6106 else
6107 max_tries = max_probe_tries;
6108
6109 /* ACK received for nullfunc probing frame */
6110 if (!ifmgd->probe_send_count)
6111 ieee80211_reset_ap_probe(sdata);
6112 else if (ifmgd->nullfunc_failed) {
6113 if (ifmgd->probe_send_count < max_tries) {
6114 mlme_dbg(sdata,
6115 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
6116 bssid, ifmgd->probe_send_count,
6117 max_tries);
6118 ieee80211_mgd_probe_ap_send(sdata);
6119 } else {
6120 mlme_dbg(sdata,
6121 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
6122 bssid);
6123 ieee80211_sta_connection_lost(sdata,
6124 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
6125 false);
6126 }
6127 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
6128 run_again(sdata, ifmgd->probe_timeout);
6129 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
6130 mlme_dbg(sdata,
6131 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
6132 bssid, probe_wait_ms);
6133 ieee80211_sta_connection_lost(sdata,
6134 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6135 } else if (ifmgd->probe_send_count < max_tries) {
6136 mlme_dbg(sdata,
6137 "No probe response from AP %pM after %dms, try %d/%i\n",
6138 bssid, probe_wait_ms,
6139 ifmgd->probe_send_count, max_tries);
6140 ieee80211_mgd_probe_ap_send(sdata);
6141 } else {
6142 /*
6143 * We actually lost the connection ... or did we?
6144 * Let's make sure!
6145 */
6146 mlme_dbg(sdata,
6147 "No probe response from AP %pM after %dms, disconnecting.\n",
6148 bssid, probe_wait_ms);
6149
6150 ieee80211_sta_connection_lost(sdata,
6151 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
6152 }
6153 }
6154
6155 sdata_unlock(sdata);
6156 }
6157
ieee80211_sta_bcn_mon_timer(struct timer_list * t)6158 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
6159 {
6160 struct ieee80211_sub_if_data *sdata =
6161 from_timer(sdata, t, u.mgd.bcn_mon_timer);
6162
6163 if (WARN_ON(sdata->vif.valid_links))
6164 return;
6165
6166 if (sdata->vif.bss_conf.csa_active &&
6167 !sdata->deflink.u.mgd.csa_waiting_bcn)
6168 return;
6169
6170 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
6171 return;
6172
6173 sdata->u.mgd.connection_loss = false;
6174 ieee80211_queue_work(&sdata->local->hw,
6175 &sdata->u.mgd.beacon_connection_loss_work);
6176 }
6177
ieee80211_sta_conn_mon_timer(struct timer_list * t)6178 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
6179 {
6180 struct ieee80211_sub_if_data *sdata =
6181 from_timer(sdata, t, u.mgd.conn_mon_timer);
6182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6183 struct ieee80211_local *local = sdata->local;
6184 struct sta_info *sta;
6185 unsigned long timeout;
6186
6187 if (WARN_ON(sdata->vif.valid_links))
6188 return;
6189
6190 if (sdata->vif.bss_conf.csa_active &&
6191 !sdata->deflink.u.mgd.csa_waiting_bcn)
6192 return;
6193
6194 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6195 if (!sta)
6196 return;
6197
6198 timeout = sta->deflink.status_stats.last_ack;
6199 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
6200 timeout = sta->deflink.rx_stats.last_rx;
6201 timeout += IEEE80211_CONNECTION_IDLE_TIME;
6202
6203 /* If timeout is after now, then update timer to fire at
6204 * the later date, but do not actually probe at this time.
6205 */
6206 if (time_is_after_jiffies(timeout)) {
6207 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
6208 return;
6209 }
6210
6211 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
6212 }
6213
ieee80211_sta_monitor_work(struct work_struct * work)6214 static void ieee80211_sta_monitor_work(struct work_struct *work)
6215 {
6216 struct ieee80211_sub_if_data *sdata =
6217 container_of(work, struct ieee80211_sub_if_data,
6218 u.mgd.monitor_work);
6219
6220 ieee80211_mgd_probe_ap(sdata, false);
6221 }
6222
ieee80211_restart_sta_timer(struct ieee80211_sub_if_data * sdata)6223 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
6224 {
6225 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
6226 __ieee80211_stop_poll(sdata);
6227
6228 /* let's probe the connection once */
6229 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
6230 ieee80211_queue_work(&sdata->local->hw,
6231 &sdata->u.mgd.monitor_work);
6232 }
6233 }
6234
6235 #ifdef CONFIG_PM
ieee80211_mgd_quiesce(struct ieee80211_sub_if_data * sdata)6236 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
6237 {
6238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6239 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6240
6241 sdata_lock(sdata);
6242
6243 if (ifmgd->auth_data || ifmgd->assoc_data) {
6244 const u8 *ap_addr = ifmgd->auth_data ?
6245 ifmgd->auth_data->ap_addr :
6246 ifmgd->assoc_data->ap_addr;
6247
6248 /*
6249 * If we are trying to authenticate / associate while suspending,
6250 * cfg80211 won't know and won't actually abort those attempts,
6251 * thus we need to do that ourselves.
6252 */
6253 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
6254 IEEE80211_STYPE_DEAUTH,
6255 WLAN_REASON_DEAUTH_LEAVING,
6256 false, frame_buf);
6257 if (ifmgd->assoc_data)
6258 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
6259 if (ifmgd->auth_data)
6260 ieee80211_destroy_auth_data(sdata, false);
6261 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
6262 IEEE80211_DEAUTH_FRAME_LEN,
6263 false);
6264 }
6265
6266 /* This is a bit of a hack - we should find a better and more generic
6267 * solution to this. Normally when suspending, cfg80211 will in fact
6268 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
6269 * auth (not so important) or assoc (this is the problem) process.
6270 *
6271 * As a consequence, it can happen that we are in the process of both
6272 * associating and suspending, and receive an association response
6273 * after cfg80211 has checked if it needs to disconnect, but before
6274 * we actually set the flag to drop incoming frames. This will then
6275 * cause the workqueue flush to process the association response in
6276 * the suspend, resulting in a successful association just before it
6277 * tries to remove the interface from the driver, which now though
6278 * has a channel context assigned ... this results in issues.
6279 *
6280 * To work around this (for now) simply deauth here again if we're
6281 * now connected.
6282 */
6283 if (ifmgd->associated && !sdata->local->wowlan) {
6284 u8 bssid[ETH_ALEN];
6285 struct cfg80211_deauth_request req = {
6286 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
6287 .bssid = bssid,
6288 };
6289
6290 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
6291 ieee80211_mgd_deauth(sdata, &req);
6292 }
6293
6294 sdata_unlock(sdata);
6295 }
6296 #endif
6297
ieee80211_sta_restart(struct ieee80211_sub_if_data * sdata)6298 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
6299 {
6300 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6301
6302 sdata_lock(sdata);
6303 if (!ifmgd->associated) {
6304 sdata_unlock(sdata);
6305 return;
6306 }
6307
6308 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
6309 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
6310 mlme_dbg(sdata, "driver requested disconnect after resume\n");
6311 ieee80211_sta_connection_lost(sdata,
6312 WLAN_REASON_UNSPECIFIED,
6313 true);
6314 sdata_unlock(sdata);
6315 return;
6316 }
6317
6318 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
6319 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
6320 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
6321 ieee80211_sta_connection_lost(sdata,
6322 WLAN_REASON_UNSPECIFIED,
6323 true);
6324 sdata_unlock(sdata);
6325 return;
6326 }
6327
6328 sdata_unlock(sdata);
6329 }
6330
ieee80211_request_smps_mgd_work(struct work_struct * work)6331 static void ieee80211_request_smps_mgd_work(struct work_struct *work)
6332 {
6333 struct ieee80211_link_data *link =
6334 container_of(work, struct ieee80211_link_data,
6335 u.mgd.request_smps_work);
6336
6337 sdata_lock(link->sdata);
6338 __ieee80211_request_smps_mgd(link->sdata, link,
6339 link->u.mgd.driver_smps_mode);
6340 sdata_unlock(link->sdata);
6341 }
6342
6343 /* interface setup */
ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data * sdata)6344 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
6345 {
6346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6347
6348 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
6349 INIT_WORK(&ifmgd->beacon_connection_loss_work,
6350 ieee80211_beacon_connection_loss_work);
6351 INIT_WORK(&ifmgd->csa_connection_drop_work,
6352 ieee80211_csa_connection_drop_work);
6353 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
6354 ieee80211_tdls_peer_del_work);
6355 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
6356 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
6357 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
6358 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
6359 ieee80211_sta_handle_tspec_ac_params_wk);
6360
6361 ifmgd->flags = 0;
6362 ifmgd->powersave = sdata->wdev.ps;
6363 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
6364 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
6365 /* Setup TDLS data */
6366 spin_lock_init(&ifmgd->teardown_lock);
6367 ifmgd->teardown_skb = NULL;
6368 ifmgd->orig_teardown_skb = NULL;
6369 }
6370
ieee80211_mgd_setup_link(struct ieee80211_link_data * link)6371 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
6372 {
6373 struct ieee80211_sub_if_data *sdata = link->sdata;
6374 struct ieee80211_local *local = sdata->local;
6375 unsigned int link_id = link->link_id;
6376
6377 link->u.mgd.p2p_noa_index = -1;
6378 link->u.mgd.conn_flags = 0;
6379 link->conf->bssid = link->u.mgd.bssid;
6380
6381 INIT_WORK(&link->u.mgd.request_smps_work,
6382 ieee80211_request_smps_mgd_work);
6383 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
6384 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
6385 else
6386 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
6387
6388 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work);
6389 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0);
6390
6391 if (sdata->u.mgd.assoc_data)
6392 ether_addr_copy(link->conf->addr,
6393 sdata->u.mgd.assoc_data->link[link_id].addr);
6394 else if (!is_valid_ether_addr(link->conf->addr))
6395 eth_random_addr(link->conf->addr);
6396 }
6397
6398 /* scan finished notification */
ieee80211_mlme_notify_scan_completed(struct ieee80211_local * local)6399 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
6400 {
6401 struct ieee80211_sub_if_data *sdata;
6402
6403 /* Restart STA timers */
6404 rcu_read_lock();
6405 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
6406 if (ieee80211_sdata_running(sdata))
6407 ieee80211_restart_sta_timer(sdata);
6408 }
6409 rcu_read_unlock();
6410 }
6411
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)6412 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
6413 struct cfg80211_bss *cbss, s8 link_id,
6414 const u8 *ap_mld_addr, bool assoc,
6415 bool override)
6416 {
6417 struct ieee80211_local *local = sdata->local;
6418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6419 struct ieee80211_bss *bss = (void *)cbss->priv;
6420 struct sta_info *new_sta = NULL;
6421 struct ieee80211_link_data *link;
6422 bool have_sta = false;
6423 bool mlo;
6424 int err;
6425
6426 if (link_id >= 0) {
6427 mlo = true;
6428 if (WARN_ON(!ap_mld_addr))
6429 return -EINVAL;
6430 err = ieee80211_vif_set_links(sdata, BIT(link_id));
6431 } else {
6432 if (WARN_ON(ap_mld_addr))
6433 return -EINVAL;
6434 ap_mld_addr = cbss->bssid;
6435 err = ieee80211_vif_set_links(sdata, 0);
6436 link_id = 0;
6437 mlo = false;
6438 }
6439
6440 if (err)
6441 return err;
6442
6443 link = sdata_dereference(sdata->link[link_id], sdata);
6444 if (WARN_ON(!link)) {
6445 err = -ENOLINK;
6446 goto out_err;
6447 }
6448
6449 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
6450 err = -EINVAL;
6451 goto out_err;
6452 }
6453
6454 /* If a reconfig is happening, bail out */
6455 if (local->in_reconfig) {
6456 err = -EBUSY;
6457 goto out_err;
6458 }
6459
6460 if (assoc) {
6461 rcu_read_lock();
6462 have_sta = sta_info_get(sdata, ap_mld_addr);
6463 rcu_read_unlock();
6464 }
6465
6466 if (!have_sta) {
6467 if (mlo)
6468 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
6469 link_id, cbss->bssid,
6470 GFP_KERNEL);
6471 else
6472 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
6473
6474 if (!new_sta) {
6475 err = -ENOMEM;
6476 goto out_err;
6477 }
6478
6479 new_sta->sta.mlo = mlo;
6480 }
6481
6482 /*
6483 * Set up the information for the new channel before setting the
6484 * new channel. We can't - completely race-free - change the basic
6485 * rates bitmap and the channel (sband) that it refers to, but if
6486 * we set it up before we at least avoid calling into the driver's
6487 * bss_info_changed() method with invalid information (since we do
6488 * call that from changing the channel - only for IDLE and perhaps
6489 * some others, but ...).
6490 *
6491 * So to avoid that, just set up all the new information before the
6492 * channel, but tell the driver to apply it only afterwards, since
6493 * it might need the new channel for that.
6494 */
6495 if (new_sta) {
6496 const struct cfg80211_bss_ies *ies;
6497 struct link_sta_info *link_sta;
6498
6499 rcu_read_lock();
6500 link_sta = rcu_dereference(new_sta->link[link_id]);
6501 if (WARN_ON(!link_sta)) {
6502 rcu_read_unlock();
6503 sta_info_free(local, new_sta);
6504 err = -EINVAL;
6505 goto out_err;
6506 }
6507
6508 err = ieee80211_mgd_setup_link_sta(link, new_sta,
6509 link_sta, cbss);
6510 if (err) {
6511 rcu_read_unlock();
6512 sta_info_free(local, new_sta);
6513 goto out_err;
6514 }
6515
6516 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
6517
6518 /* set timing information */
6519 link->conf->beacon_int = cbss->beacon_interval;
6520 ies = rcu_dereference(cbss->beacon_ies);
6521 if (ies) {
6522 link->conf->sync_tsf = ies->tsf;
6523 link->conf->sync_device_ts =
6524 bss->device_ts_beacon;
6525
6526 ieee80211_get_dtim(ies,
6527 &link->conf->sync_dtim_count,
6528 NULL);
6529 } else if (!ieee80211_hw_check(&sdata->local->hw,
6530 TIMING_BEACON_ONLY)) {
6531 ies = rcu_dereference(cbss->proberesp_ies);
6532 /* must be non-NULL since beacon IEs were NULL */
6533 link->conf->sync_tsf = ies->tsf;
6534 link->conf->sync_device_ts =
6535 bss->device_ts_presp;
6536 link->conf->sync_dtim_count = 0;
6537 } else {
6538 link->conf->sync_tsf = 0;
6539 link->conf->sync_device_ts = 0;
6540 link->conf->sync_dtim_count = 0;
6541 }
6542 rcu_read_unlock();
6543 }
6544
6545 if (new_sta || override) {
6546 err = ieee80211_prep_channel(sdata, link, cbss,
6547 &link->u.mgd.conn_flags);
6548 if (err) {
6549 if (new_sta)
6550 sta_info_free(local, new_sta);
6551 goto out_err;
6552 }
6553 }
6554
6555 if (new_sta) {
6556 /*
6557 * tell driver about BSSID, basic rates and timing
6558 * this was set up above, before setting the channel
6559 */
6560 ieee80211_link_info_change_notify(sdata, link,
6561 BSS_CHANGED_BSSID |
6562 BSS_CHANGED_BASIC_RATES |
6563 BSS_CHANGED_BEACON_INT);
6564
6565 if (assoc)
6566 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
6567
6568 err = sta_info_insert(new_sta);
6569 new_sta = NULL;
6570 if (err) {
6571 sdata_info(sdata,
6572 "failed to insert STA entry for the AP (error %d)\n",
6573 err);
6574 goto out_err;
6575 }
6576 } else
6577 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
6578
6579 /* Cancel scan to ensure that nothing interferes with connection */
6580 if (local->scanning)
6581 ieee80211_scan_cancel(local);
6582
6583 return 0;
6584
6585 out_err:
6586 ieee80211_link_release_channel(&sdata->deflink);
6587 ieee80211_vif_set_links(sdata, 0);
6588 return err;
6589 }
6590
6591 /* config hooks */
ieee80211_mgd_auth(struct ieee80211_sub_if_data * sdata,struct cfg80211_auth_request * req)6592 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
6593 struct cfg80211_auth_request *req)
6594 {
6595 struct ieee80211_local *local = sdata->local;
6596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6597 struct ieee80211_mgd_auth_data *auth_data;
6598 u16 auth_alg;
6599 int err;
6600 bool cont_auth;
6601
6602 /* prepare auth data structure */
6603
6604 switch (req->auth_type) {
6605 case NL80211_AUTHTYPE_OPEN_SYSTEM:
6606 auth_alg = WLAN_AUTH_OPEN;
6607 break;
6608 case NL80211_AUTHTYPE_SHARED_KEY:
6609 if (fips_enabled)
6610 return -EOPNOTSUPP;
6611 auth_alg = WLAN_AUTH_SHARED_KEY;
6612 break;
6613 case NL80211_AUTHTYPE_FT:
6614 auth_alg = WLAN_AUTH_FT;
6615 break;
6616 case NL80211_AUTHTYPE_NETWORK_EAP:
6617 auth_alg = WLAN_AUTH_LEAP;
6618 break;
6619 case NL80211_AUTHTYPE_SAE:
6620 auth_alg = WLAN_AUTH_SAE;
6621 break;
6622 case NL80211_AUTHTYPE_FILS_SK:
6623 auth_alg = WLAN_AUTH_FILS_SK;
6624 break;
6625 case NL80211_AUTHTYPE_FILS_SK_PFS:
6626 auth_alg = WLAN_AUTH_FILS_SK_PFS;
6627 break;
6628 case NL80211_AUTHTYPE_FILS_PK:
6629 auth_alg = WLAN_AUTH_FILS_PK;
6630 break;
6631 default:
6632 return -EOPNOTSUPP;
6633 }
6634
6635 if (ifmgd->assoc_data)
6636 return -EBUSY;
6637
6638 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
6639 req->ie_len, GFP_KERNEL);
6640 if (!auth_data)
6641 return -ENOMEM;
6642
6643 memcpy(auth_data->ap_addr,
6644 req->ap_mld_addr ?: req->bss->bssid,
6645 ETH_ALEN);
6646 auth_data->bss = req->bss;
6647 auth_data->link_id = req->link_id;
6648
6649 if (req->auth_data_len >= 4) {
6650 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
6651 __le16 *pos = (__le16 *) req->auth_data;
6652
6653 auth_data->sae_trans = le16_to_cpu(pos[0]);
6654 auth_data->sae_status = le16_to_cpu(pos[1]);
6655 }
6656 memcpy(auth_data->data, req->auth_data + 4,
6657 req->auth_data_len - 4);
6658 auth_data->data_len += req->auth_data_len - 4;
6659 }
6660
6661 /* Check if continuing authentication or trying to authenticate with the
6662 * same BSS that we were in the process of authenticating with and avoid
6663 * removal and re-addition of the STA entry in
6664 * ieee80211_prep_connection().
6665 */
6666 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
6667 ifmgd->auth_data->link_id == req->link_id;
6668
6669 if (req->ie && req->ie_len) {
6670 memcpy(&auth_data->data[auth_data->data_len],
6671 req->ie, req->ie_len);
6672 auth_data->data_len += req->ie_len;
6673 }
6674
6675 if (req->key && req->key_len) {
6676 auth_data->key_len = req->key_len;
6677 auth_data->key_idx = req->key_idx;
6678 memcpy(auth_data->key, req->key, req->key_len);
6679 }
6680
6681 auth_data->algorithm = auth_alg;
6682
6683 /* try to authenticate/probe */
6684
6685 if (ifmgd->auth_data) {
6686 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
6687 auth_data->peer_confirmed =
6688 ifmgd->auth_data->peer_confirmed;
6689 }
6690 ieee80211_destroy_auth_data(sdata, cont_auth);
6691 }
6692
6693 /* prep auth_data so we don't go into idle on disassoc */
6694 ifmgd->auth_data = auth_data;
6695
6696 /* If this is continuation of an ongoing SAE authentication exchange
6697 * (i.e., request to send SAE Confirm) and the peer has already
6698 * confirmed, mark authentication completed since we are about to send
6699 * out SAE Confirm.
6700 */
6701 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
6702 auth_data->peer_confirmed && auth_data->sae_trans == 2)
6703 ieee80211_mark_sta_auth(sdata);
6704
6705 if (ifmgd->associated) {
6706 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6707
6708 sdata_info(sdata,
6709 "disconnect from AP %pM for new auth to %pM\n",
6710 sdata->vif.cfg.ap_addr, auth_data->ap_addr);
6711 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6712 WLAN_REASON_UNSPECIFIED,
6713 false, frame_buf);
6714
6715 ieee80211_report_disconnect(sdata, frame_buf,
6716 sizeof(frame_buf), true,
6717 WLAN_REASON_UNSPECIFIED,
6718 false);
6719 }
6720
6721 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr);
6722
6723 /* needed for transmitting the auth frame(s) properly */
6724 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
6725
6726 err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
6727 req->ap_mld_addr, cont_auth, false);
6728 if (err)
6729 goto err_clear;
6730
6731 err = ieee80211_auth(sdata);
6732 if (err) {
6733 sta_info_destroy_addr(sdata, auth_data->ap_addr);
6734 goto err_clear;
6735 }
6736
6737 /* hold our own reference */
6738 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
6739 return 0;
6740
6741 err_clear:
6742 if (!sdata->vif.valid_links) {
6743 eth_zero_addr(sdata->deflink.u.mgd.bssid);
6744 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
6745 BSS_CHANGED_BSSID);
6746 mutex_lock(&sdata->local->mtx);
6747 ieee80211_link_release_channel(&sdata->deflink);
6748 mutex_unlock(&sdata->local->mtx);
6749 }
6750 ifmgd->auth_data = NULL;
6751 kfree(auth_data);
6752 return err;
6753 }
6754
6755 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)6756 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
6757 struct ieee80211_mgd_assoc_data *assoc_data,
6758 struct cfg80211_assoc_request *req,
6759 ieee80211_conn_flags_t conn_flags,
6760 unsigned int link_id)
6761 {
6762 struct ieee80211_local *local = sdata->local;
6763 const struct cfg80211_bss_ies *beacon_ies;
6764 struct ieee80211_supported_band *sband;
6765 const struct element *ht_elem, *vht_elem;
6766 struct ieee80211_link_data *link;
6767 struct cfg80211_bss *cbss;
6768 struct ieee80211_bss *bss;
6769 bool is_5ghz, is_6ghz;
6770
6771 cbss = assoc_data->link[link_id].bss;
6772 if (WARN_ON(!cbss))
6773 return 0;
6774
6775 bss = (void *)cbss->priv;
6776
6777 sband = local->hw.wiphy->bands[cbss->channel->band];
6778 if (WARN_ON(!sband))
6779 return 0;
6780
6781 link = sdata_dereference(sdata->link[link_id], sdata);
6782 if (WARN_ON(!link))
6783 return 0;
6784
6785 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
6786 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
6787
6788 /* for MLO connections assume advertising all rates is OK */
6789 if (!req->ap_mld_addr) {
6790 assoc_data->supp_rates = bss->supp_rates;
6791 assoc_data->supp_rates_len = bss->supp_rates_len;
6792 }
6793
6794 /* copy and link elems for the STA profile */
6795 if (req->links[link_id].elems_len) {
6796 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
6797 req->links[link_id].elems_len);
6798 assoc_data->link[link_id].elems = assoc_data->ie_pos;
6799 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
6800 assoc_data->ie_pos += req->links[link_id].elems_len;
6801 }
6802
6803 rcu_read_lock();
6804 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
6805 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation))
6806 assoc_data->link[link_id].ap_ht_param =
6807 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param;
6808 else if (!is_6ghz)
6809 conn_flags |= IEEE80211_CONN_DISABLE_HT;
6810 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
6811 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) {
6812 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data,
6813 sizeof(struct ieee80211_vht_cap));
6814 } else if (is_5ghz) {
6815 link_info(link,
6816 "VHT capa missing/short, disabling VHT/HE/EHT\n");
6817 conn_flags |= IEEE80211_CONN_DISABLE_VHT |
6818 IEEE80211_CONN_DISABLE_HE |
6819 IEEE80211_CONN_DISABLE_EHT;
6820 }
6821 rcu_read_unlock();
6822
6823 link->u.mgd.beacon_crc_valid = false;
6824 link->u.mgd.dtim_period = 0;
6825 link->u.mgd.have_beacon = false;
6826
6827 /* override HT/VHT configuration only if the AP and we support it */
6828 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
6829 struct ieee80211_sta_ht_cap sta_ht_cap;
6830
6831 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
6832 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
6833 }
6834
6835 rcu_read_lock();
6836 beacon_ies = rcu_dereference(cbss->beacon_ies);
6837 if (beacon_ies) {
6838 const struct element *elem;
6839 u8 dtim_count = 0;
6840
6841 ieee80211_get_dtim(beacon_ies, &dtim_count,
6842 &link->u.mgd.dtim_period);
6843
6844 sdata->deflink.u.mgd.have_beacon = true;
6845
6846 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
6847 link->conf->sync_tsf = beacon_ies->tsf;
6848 link->conf->sync_device_ts = bss->device_ts_beacon;
6849 link->conf->sync_dtim_count = dtim_count;
6850 }
6851
6852 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
6853 beacon_ies->data, beacon_ies->len);
6854 if (elem && elem->datalen >= 3)
6855 link->conf->profile_periodicity = elem->data[2];
6856 else
6857 link->conf->profile_periodicity = 0;
6858
6859 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
6860 beacon_ies->data, beacon_ies->len);
6861 if (elem && elem->datalen >= 11 &&
6862 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6863 link->conf->ema_ap = true;
6864 else
6865 link->conf->ema_ap = false;
6866 }
6867 rcu_read_unlock();
6868
6869 if (bss->corrupt_data) {
6870 char *corrupt_type = "data";
6871
6872 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
6873 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
6874 corrupt_type = "beacon and probe response";
6875 else
6876 corrupt_type = "beacon";
6877 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
6878 corrupt_type = "probe response";
6879 }
6880 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
6881 cbss->bssid, corrupt_type);
6882 }
6883
6884 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
6885 if (sdata->u.mgd.powersave)
6886 link->smps_mode = IEEE80211_SMPS_DYNAMIC;
6887 else
6888 link->smps_mode = IEEE80211_SMPS_OFF;
6889 } else {
6890 link->smps_mode = link->u.mgd.req_smps;
6891 }
6892
6893 return conn_flags;
6894 }
6895
ieee80211_mgd_assoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_assoc_request * req)6896 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
6897 struct cfg80211_assoc_request *req)
6898 {
6899 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
6900 struct ieee80211_local *local = sdata->local;
6901 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6902 struct ieee80211_mgd_assoc_data *assoc_data;
6903 const struct element *ssid_elem;
6904 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6905 ieee80211_conn_flags_t conn_flags = 0;
6906 struct ieee80211_link_data *link;
6907 struct cfg80211_bss *cbss;
6908 struct ieee80211_bss *bss;
6909 bool override;
6910 int i, err;
6911 size_t size = sizeof(*assoc_data) + req->ie_len;
6912
6913 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
6914 size += req->links[i].elems_len;
6915
6916 /* FIXME: no support for 4-addr MLO yet */
6917 if (sdata->u.mgd.use_4addr && req->link_id >= 0)
6918 return -EOPNOTSUPP;
6919
6920 assoc_data = kzalloc(size, GFP_KERNEL);
6921 if (!assoc_data)
6922 return -ENOMEM;
6923
6924 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
6925
6926 rcu_read_lock();
6927 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
6928 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
6929 rcu_read_unlock();
6930 kfree(assoc_data);
6931 return -EINVAL;
6932 }
6933 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
6934 assoc_data->ssid_len = ssid_elem->datalen;
6935 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
6936 vif_cfg->ssid_len = assoc_data->ssid_len;
6937 rcu_read_unlock();
6938
6939 if (req->ap_mld_addr) {
6940 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
6941 if (!req->links[i].bss)
6942 continue;
6943 link = sdata_dereference(sdata->link[i], sdata);
6944 if (link)
6945 ether_addr_copy(assoc_data->link[i].addr,
6946 link->conf->addr);
6947 else
6948 eth_random_addr(assoc_data->link[i].addr);
6949 }
6950 } else {
6951 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
6952 }
6953
6954 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
6955
6956 memcpy(assoc_data->ap_addr,
6957 req->ap_mld_addr ?: req->bss->bssid,
6958 ETH_ALEN);
6959
6960 if (ifmgd->associated) {
6961 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6962
6963 sdata_info(sdata,
6964 "disconnect from AP %pM for new assoc to %pM\n",
6965 sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
6966 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6967 WLAN_REASON_UNSPECIFIED,
6968 false, frame_buf);
6969
6970 ieee80211_report_disconnect(sdata, frame_buf,
6971 sizeof(frame_buf), true,
6972 WLAN_REASON_UNSPECIFIED,
6973 false);
6974 }
6975
6976 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
6977 err = -EBUSY;
6978 goto err_free;
6979 }
6980
6981 if (ifmgd->assoc_data) {
6982 err = -EBUSY;
6983 goto err_free;
6984 }
6985
6986 if (ifmgd->auth_data) {
6987 bool match;
6988
6989 /* keep sta info, bssid if matching */
6990 match = ether_addr_equal(ifmgd->auth_data->ap_addr,
6991 assoc_data->ap_addr) &&
6992 ifmgd->auth_data->link_id == req->link_id;
6993 ieee80211_destroy_auth_data(sdata, match);
6994 }
6995
6996 /* prepare assoc data */
6997
6998 bss = (void *)cbss->priv;
6999 assoc_data->wmm = bss->wmm_used &&
7000 (local->hw.queues >= IEEE80211_NUM_ACS);
7001
7002 /*
7003 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
7004 * We still associate in non-HT mode (11a/b/g) if any one of these
7005 * ciphers is configured as pairwise.
7006 * We can set this to true for non-11n hardware, that'll be checked
7007 * separately along with the peer capabilities.
7008 */
7009 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
7010 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
7011 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
7012 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
7013 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7014 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7015 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7016 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7017 netdev_info(sdata->dev,
7018 "disabling HT/VHT/HE due to WEP/TKIP use\n");
7019 }
7020 }
7021
7022 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
7023 if (!bss->wmm_used) {
7024 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7025 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7026 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7027 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7028 netdev_info(sdata->dev,
7029 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
7030 }
7031
7032 if (req->flags & ASSOC_REQ_DISABLE_HT) {
7033 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n");
7034 conn_flags |= IEEE80211_CONN_DISABLE_HT;
7035 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7036 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7037 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7038 }
7039
7040 if (req->flags & ASSOC_REQ_DISABLE_VHT) {
7041 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n");
7042 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
7043 }
7044
7045 if (req->flags & ASSOC_REQ_DISABLE_HE) {
7046 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
7047 conn_flags |= IEEE80211_CONN_DISABLE_HE;
7048 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7049 }
7050
7051 if (req->flags & ASSOC_REQ_DISABLE_EHT)
7052 conn_flags |= IEEE80211_CONN_DISABLE_EHT;
7053
7054 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
7055 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
7056 sizeof(ifmgd->ht_capa_mask));
7057
7058 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
7059 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
7060 sizeof(ifmgd->vht_capa_mask));
7061
7062 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
7063 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
7064 sizeof(ifmgd->s1g_capa_mask));
7065
7066 if (req->ie && req->ie_len) {
7067 memcpy(assoc_data->ie, req->ie, req->ie_len);
7068 assoc_data->ie_len = req->ie_len;
7069 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
7070 } else {
7071 assoc_data->ie_pos = assoc_data->ie;
7072 }
7073
7074 if (req->fils_kek) {
7075 /* should already be checked in cfg80211 - so warn */
7076 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
7077 err = -EINVAL;
7078 goto err_free;
7079 }
7080 memcpy(assoc_data->fils_kek, req->fils_kek,
7081 req->fils_kek_len);
7082 assoc_data->fils_kek_len = req->fils_kek_len;
7083 }
7084
7085 if (req->fils_nonces)
7086 memcpy(assoc_data->fils_nonces, req->fils_nonces,
7087 2 * FILS_NONCE_LEN);
7088
7089 /* default timeout */
7090 assoc_data->timeout = jiffies;
7091 assoc_data->timeout_started = true;
7092
7093 assoc_data->assoc_link_id = assoc_link_id;
7094
7095 if (req->ap_mld_addr) {
7096 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7097 assoc_data->link[i].conn_flags = conn_flags;
7098 assoc_data->link[i].bss = req->links[i].bss;
7099 }
7100
7101 /* if there was no authentication, set up the link */
7102 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id));
7103 if (err)
7104 goto err_clear;
7105 } else {
7106 assoc_data->link[0].conn_flags = conn_flags;
7107 assoc_data->link[0].bss = cbss;
7108 }
7109
7110 link = sdata_dereference(sdata->link[assoc_link_id], sdata);
7111 if (WARN_ON(!link)) {
7112 err = -EINVAL;
7113 goto err_clear;
7114 }
7115
7116 /* keep old conn_flags from ieee80211_prep_channel() from auth */
7117 conn_flags |= link->u.mgd.conn_flags;
7118 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req,
7119 conn_flags, assoc_link_id);
7120 override = link->u.mgd.conn_flags != conn_flags;
7121 link->u.mgd.conn_flags |= conn_flags;
7122
7123 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
7124 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
7125 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
7126 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
7127
7128 if (bss->wmm_used && bss->uapsd_supported &&
7129 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
7130 assoc_data->uapsd = true;
7131 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
7132 } else {
7133 assoc_data->uapsd = false;
7134 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
7135 }
7136
7137 if (req->prev_bssid)
7138 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
7139
7140 if (req->use_mfp) {
7141 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
7142 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
7143 } else {
7144 ifmgd->mfp = IEEE80211_MFP_DISABLED;
7145 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
7146 }
7147
7148 if (req->flags & ASSOC_REQ_USE_RRM)
7149 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
7150 else
7151 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
7152
7153 if (req->crypto.control_port)
7154 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
7155 else
7156 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
7157
7158 sdata->control_port_protocol = req->crypto.control_port_ethertype;
7159 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
7160 sdata->control_port_over_nl80211 =
7161 req->crypto.control_port_over_nl80211;
7162 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
7163
7164 /* kick off associate process */
7165 ifmgd->assoc_data = assoc_data;
7166
7167 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
7168 if (!assoc_data->link[i].bss)
7169 continue;
7170 if (i == assoc_data->assoc_link_id)
7171 continue;
7172 /* only calculate the flags, hence link == NULL */
7173 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss,
7174 &assoc_data->link[i].conn_flags);
7175 if (err)
7176 goto err_clear;
7177 }
7178
7179 /* needed for transmitting the assoc frames properly */
7180 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
7181
7182 err = ieee80211_prep_connection(sdata, cbss, req->link_id,
7183 req->ap_mld_addr, true, override);
7184 if (err)
7185 goto err_clear;
7186
7187 assoc_data->link[assoc_data->assoc_link_id].conn_flags =
7188 link->u.mgd.conn_flags;
7189
7190 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
7191 const struct cfg80211_bss_ies *beacon_ies;
7192
7193 rcu_read_lock();
7194 beacon_ies = rcu_dereference(req->bss->beacon_ies);
7195
7196 if (beacon_ies) {
7197 /*
7198 * Wait up to one beacon interval ...
7199 * should this be more if we miss one?
7200 */
7201 sdata_info(sdata, "waiting for beacon from %pM\n",
7202 link->u.mgd.bssid);
7203 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
7204 assoc_data->timeout_started = true;
7205 assoc_data->need_beacon = true;
7206 }
7207 rcu_read_unlock();
7208 }
7209
7210 run_again(sdata, assoc_data->timeout);
7211
7212 return 0;
7213 err_clear:
7214 eth_zero_addr(sdata->deflink.u.mgd.bssid);
7215 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7216 BSS_CHANGED_BSSID);
7217 ifmgd->assoc_data = NULL;
7218 err_free:
7219 kfree(assoc_data);
7220 return err;
7221 }
7222
ieee80211_mgd_deauth(struct ieee80211_sub_if_data * sdata,struct cfg80211_deauth_request * req)7223 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
7224 struct cfg80211_deauth_request *req)
7225 {
7226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7227 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7228 bool tx = !req->local_state_change;
7229 struct ieee80211_prep_tx_info info = {
7230 .subtype = IEEE80211_STYPE_DEAUTH,
7231 };
7232
7233 if (ifmgd->auth_data &&
7234 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
7235 sdata_info(sdata,
7236 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
7237 req->bssid, req->reason_code,
7238 ieee80211_get_reason_code_string(req->reason_code));
7239
7240 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7241 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7242 IEEE80211_STYPE_DEAUTH,
7243 req->reason_code, tx,
7244 frame_buf);
7245 ieee80211_destroy_auth_data(sdata, false);
7246 ieee80211_report_disconnect(sdata, frame_buf,
7247 sizeof(frame_buf), true,
7248 req->reason_code, false);
7249 drv_mgd_complete_tx(sdata->local, sdata, &info);
7250 return 0;
7251 }
7252
7253 if (ifmgd->assoc_data &&
7254 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
7255 sdata_info(sdata,
7256 "aborting association with %pM by local choice (Reason: %u=%s)\n",
7257 req->bssid, req->reason_code,
7258 ieee80211_get_reason_code_string(req->reason_code));
7259
7260 drv_mgd_prepare_tx(sdata->local, sdata, &info);
7261 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
7262 IEEE80211_STYPE_DEAUTH,
7263 req->reason_code, tx,
7264 frame_buf);
7265 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
7266 ieee80211_report_disconnect(sdata, frame_buf,
7267 sizeof(frame_buf), true,
7268 req->reason_code, false);
7269 return 0;
7270 }
7271
7272 if (ifmgd->associated &&
7273 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
7274 sdata_info(sdata,
7275 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
7276 req->bssid, req->reason_code,
7277 ieee80211_get_reason_code_string(req->reason_code));
7278
7279 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
7280 req->reason_code, tx, frame_buf);
7281 ieee80211_report_disconnect(sdata, frame_buf,
7282 sizeof(frame_buf), true,
7283 req->reason_code, false);
7284 drv_mgd_complete_tx(sdata->local, sdata, &info);
7285 return 0;
7286 }
7287
7288 return -ENOTCONN;
7289 }
7290
ieee80211_mgd_disassoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_disassoc_request * req)7291 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
7292 struct cfg80211_disassoc_request *req)
7293 {
7294 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7295
7296 if (!sdata->u.mgd.associated ||
7297 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
7298 return -ENOTCONN;
7299
7300 sdata_info(sdata,
7301 "disassociating from %pM by local choice (Reason: %u=%s)\n",
7302 req->ap_addr, req->reason_code,
7303 ieee80211_get_reason_code_string(req->reason_code));
7304
7305 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
7306 req->reason_code, !req->local_state_change,
7307 frame_buf);
7308
7309 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
7310 req->reason_code, false);
7311
7312 return 0;
7313 }
7314
ieee80211_mgd_stop_link(struct ieee80211_link_data * link)7315 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
7316 {
7317 cancel_work_sync(&link->u.mgd.request_smps_work);
7318 cancel_work_sync(&link->u.mgd.chswitch_work);
7319 }
7320
ieee80211_mgd_stop(struct ieee80211_sub_if_data * sdata)7321 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
7322 {
7323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7324
7325 /*
7326 * Make sure some work items will not run after this,
7327 * they will not do anything but might not have been
7328 * cancelled when disconnecting.
7329 */
7330 cancel_work_sync(&ifmgd->monitor_work);
7331 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
7332 cancel_work_sync(&ifmgd->csa_connection_drop_work);
7333 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
7334
7335 sdata_lock(sdata);
7336 if (ifmgd->assoc_data)
7337 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
7338 if (ifmgd->auth_data)
7339 ieee80211_destroy_auth_data(sdata, false);
7340 spin_lock_bh(&ifmgd->teardown_lock);
7341 if (ifmgd->teardown_skb) {
7342 kfree_skb(ifmgd->teardown_skb);
7343 ifmgd->teardown_skb = NULL;
7344 ifmgd->orig_teardown_skb = NULL;
7345 }
7346 kfree(ifmgd->assoc_req_ies);
7347 ifmgd->assoc_req_ies = NULL;
7348 ifmgd->assoc_req_ies_len = 0;
7349 spin_unlock_bh(&ifmgd->teardown_lock);
7350 del_timer_sync(&ifmgd->timer);
7351 sdata_unlock(sdata);
7352 }
7353
ieee80211_cqm_rssi_notify(struct ieee80211_vif * vif,enum nl80211_cqm_rssi_threshold_event rssi_event,s32 rssi_level,gfp_t gfp)7354 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
7355 enum nl80211_cqm_rssi_threshold_event rssi_event,
7356 s32 rssi_level,
7357 gfp_t gfp)
7358 {
7359 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7360
7361 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
7362
7363 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
7364 }
7365 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
7366
ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif * vif,gfp_t gfp)7367 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
7368 {
7369 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7370
7371 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
7372
7373 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
7374 }
7375 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
7376
_ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)7377 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
7378 int rssi_min_thold,
7379 int rssi_max_thold)
7380 {
7381 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
7382
7383 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
7384 return;
7385
7386 /*
7387 * Scale up threshold values before storing it, as the RSSI averaging
7388 * algorithm uses a scaled up value as well. Change this scaling
7389 * factor if the RSSI averaging algorithm changes.
7390 */
7391 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
7392 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
7393 }
7394
ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)7395 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
7396 int rssi_min_thold,
7397 int rssi_max_thold)
7398 {
7399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7400
7401 WARN_ON(rssi_min_thold == rssi_max_thold ||
7402 rssi_min_thold > rssi_max_thold);
7403
7404 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
7405 rssi_max_thold);
7406 }
7407 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
7408
ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)7409 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
7410 {
7411 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7412
7413 _ieee80211_enable_rssi_reports(sdata, 0, 0);
7414 }
7415 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
7416