1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * BSS client mode implementation
4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
11 * Copyright (C) 2018 - 2024 Intel Corporation
12 */
13
14 #include <linux/delay.h>
15 #include <linux/fips.h>
16 #include <linux/if_ether.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20 #include <linux/moduleparam.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32 #include "fils_aead.h"
33
34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2)
41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
44 #define IEEE80211_ASSOC_MAX_TRIES 3
45
46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100)
47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00
48
49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5)
50
51 static int max_nullfunc_tries = 2;
52 module_param(max_nullfunc_tries, int, 0644);
53 MODULE_PARM_DESC(max_nullfunc_tries,
54 "Maximum nullfunc tx tries before disconnecting (reason 4).");
55
56 static int max_probe_tries = 5;
57 module_param(max_probe_tries, int, 0644);
58 MODULE_PARM_DESC(max_probe_tries,
59 "Maximum probe tries before disconnecting (reason 4).");
60
61 /*
62 * Beacon loss timeout is calculated as N frames times the
63 * advertised beacon interval. This may need to be somewhat
64 * higher than what hardware might detect to account for
65 * delays in the host processing frames. But since we also
66 * probe on beacon miss before declaring the connection lost
67 * default to what we want.
68 */
69 static int beacon_loss_count = 7;
70 module_param(beacon_loss_count, int, 0644);
71 MODULE_PARM_DESC(beacon_loss_count,
72 "Number of beacon intervals before we decide beacon was lost.");
73
74 /*
75 * Time the connection can be idle before we probe
76 * it to see if we can still talk to the AP.
77 */
78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
79 /*
80 * Time we wait for a probe response after sending
81 * a probe request because of beacon loss or for
82 * checking the connection still works.
83 */
84 static int probe_wait_ms = 500;
85 module_param(probe_wait_ms, int, 0644);
86 MODULE_PARM_DESC(probe_wait_ms,
87 "Maximum time(ms) to wait for probe response"
88 " before disconnecting (reason 4).");
89
90 /*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
96 /*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
run_again(struct ieee80211_sub_if_data * sdata,unsigned long timeout)106 static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
108 {
109 lockdep_assert_wiphy(sdata->local->hw.wiphy);
110
111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
114 }
115
ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data * sdata)116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
117 {
118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
119 return;
120
121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
122 return;
123
124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
126 }
127
ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data * sdata)128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129 {
130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
132 if (unlikely(!ifmgd->associated))
133 return;
134
135 if (ifmgd->probe_send_count)
136 ifmgd->probe_send_count = 0;
137
138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
139 return;
140
141 mod_timer(&ifmgd->conn_mon_timer,
142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
143 }
144
ecw2cw(int ecw)145 static int ecw2cw(int ecw)
146 {
147 return (1 << ecw) - 1;
148 }
149
150 static enum ieee80211_conn_mode
ieee80211_determine_ap_chan(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,u32 vht_cap_info,const struct ieee802_11_elems * elems,bool ignore_ht_channel_mismatch,const struct ieee80211_conn_settings * conn,struct cfg80211_chan_def * chandef)151 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_channel *channel,
153 u32 vht_cap_info,
154 const struct ieee802_11_elems *elems,
155 bool ignore_ht_channel_mismatch,
156 const struct ieee80211_conn_settings *conn,
157 struct cfg80211_chan_def *chandef)
158 {
159 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation;
160 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation;
161 const struct ieee80211_he_operation *he_oper = elems->he_operation;
162 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation;
163 struct ieee80211_supported_band *sband =
164 sdata->local->hw.wiphy->bands[channel->band];
165 struct cfg80211_chan_def vht_chandef;
166 bool no_vht = false;
167 u32 ht_cfreq;
168
169 *chandef = (struct cfg80211_chan_def) {
170 .chan = channel,
171 .width = NL80211_CHAN_WIDTH_20_NOHT,
172 .center_freq1 = channel->center_freq,
173 .freq1_offset = channel->freq_offset,
174 };
175
176 /* get special S1G case out of the way */
177 if (sband->band == NL80211_BAND_S1GHZ) {
178 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) {
179 sdata_info(sdata,
180 "Missing S1G Operation Element? Trying operating == primary\n");
181 chandef->width = ieee80211_s1g_channel_width(channel);
182 }
183
184 return IEEE80211_CONN_MODE_S1G;
185 }
186
187 /* get special 6 GHz case out of the way */
188 if (sband->band == NL80211_BAND_6GHZ) {
189 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT;
190
191 /* this is an error */
192 if (conn->mode < IEEE80211_CONN_MODE_HE)
193 return IEEE80211_CONN_MODE_LEGACY;
194
195 if (!elems->he_6ghz_capa || !elems->he_cap) {
196 sdata_info(sdata,
197 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n");
198 return IEEE80211_CONN_MODE_LEGACY;
199 }
200
201 if (!eht_oper || !elems->eht_cap) {
202 eht_oper = NULL;
203 mode = IEEE80211_CONN_MODE_HE;
204 }
205
206 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper,
207 eht_oper, chandef)) {
208 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n");
209 return IEEE80211_CONN_MODE_LEGACY;
210 }
211
212 return mode;
213 }
214
215 /* now we have the progression HT, VHT, ... */
216 if (conn->mode < IEEE80211_CONN_MODE_HT)
217 return IEEE80211_CONN_MODE_LEGACY;
218
219 if (!ht_oper || !elems->ht_cap_elem)
220 return IEEE80211_CONN_MODE_LEGACY;
221
222 chandef->width = NL80211_CHAN_WIDTH_20;
223
224 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
225 channel->band);
226 /* check that channel matches the right operating channel */
227 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) {
228 /*
229 * It's possible that some APs are confused here;
230 * Netgear WNDR3700 sometimes reports 4 higher than
231 * the actual channel in association responses, but
232 * since we look at probe response/beacon data here
233 * it should be OK.
234 */
235 sdata_info(sdata,
236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
237 channel->center_freq, ht_cfreq,
238 ht_oper->primary_chan, channel->band);
239 return IEEE80211_CONN_MODE_LEGACY;
240 }
241
242 ieee80211_chandef_ht_oper(ht_oper, chandef);
243
244 if (conn->mode < IEEE80211_CONN_MODE_VHT)
245 return IEEE80211_CONN_MODE_HT;
246
247 vht_chandef = *chandef;
248
249 /*
250 * having he_cap/he_oper parsed out implies we're at
251 * least operating as HE STA
252 */
253 if (elems->he_cap && he_oper &&
254 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) {
255 struct ieee80211_vht_operation he_oper_vht_cap;
256
257 /*
258 * Set only first 3 bytes (other 2 aren't used in
259 * ieee80211_chandef_vht_oper() anyway)
260 */
261 memcpy(&he_oper_vht_cap, he_oper->optional, 3);
262 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0);
263
264 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
265 &he_oper_vht_cap, ht_oper,
266 &vht_chandef)) {
267 sdata_info(sdata,
268 "HE AP VHT information is invalid, disabling HE\n");
269 /* this will cause us to re-parse as VHT STA */
270 return IEEE80211_CONN_MODE_VHT;
271 }
272 } else if (!vht_oper || !elems->vht_cap_elem) {
273 if (sband->band == NL80211_BAND_5GHZ) {
274 sdata_info(sdata,
275 "VHT information is missing, disabling VHT\n");
276 return IEEE80211_CONN_MODE_HT;
277 }
278 no_vht = true;
279 } else if (sband->band == NL80211_BAND_2GHZ) {
280 no_vht = true;
281 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
282 vht_cap_info,
283 vht_oper, ht_oper,
284 &vht_chandef)) {
285 sdata_info(sdata,
286 "AP VHT information is invalid, disabling VHT\n");
287 return IEEE80211_CONN_MODE_HT;
288 }
289
290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
291 sdata_info(sdata,
292 "AP VHT information doesn't match HT, disabling VHT\n");
293 return IEEE80211_CONN_MODE_HT;
294 }
295
296 *chandef = vht_chandef;
297
298 /* stick to current max mode if we or the AP don't have HE */
299 if (conn->mode < IEEE80211_CONN_MODE_HE ||
300 !elems->he_operation || !elems->he_cap) {
301 if (no_vht)
302 return IEEE80211_CONN_MODE_HT;
303 return IEEE80211_CONN_MODE_VHT;
304 }
305
306 /* stick to HE if we or the AP don't have EHT */
307 if (conn->mode < IEEE80211_CONN_MODE_EHT ||
308 !eht_oper || !elems->eht_cap)
309 return IEEE80211_CONN_MODE_HE;
310
311 /*
312 * handle the case that the EHT operation indicates that it holds EHT
313 * operation information (in case that the channel width differs from
314 * the channel width reported in HT/VHT/HE).
315 */
316 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) {
317 struct cfg80211_chan_def eht_chandef = *chandef;
318
319 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
320 &eht_chandef);
321
322 eht_chandef.punctured =
323 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
324
325 if (!cfg80211_chandef_valid(&eht_chandef)) {
326 sdata_info(sdata,
327 "AP EHT information is invalid, disabling EHT\n");
328 return IEEE80211_CONN_MODE_HE;
329 }
330
331 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) {
332 sdata_info(sdata,
333 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n");
334 return IEEE80211_CONN_MODE_HE;
335 }
336
337 *chandef = eht_chandef;
338 }
339
340 return IEEE80211_CONN_MODE_EHT;
341 }
342
343 static bool
ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data * sdata,const struct ieee80211_he_cap_elem * he_cap,const struct ieee80211_he_operation * he_op)344 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
345 const struct ieee80211_he_cap_elem *he_cap,
346 const struct ieee80211_he_operation *he_op)
347 {
348 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
349 u16 mcs_80_map_tx, mcs_80_map_rx;
350 u16 ap_min_req_set;
351 int nss;
352
353 if (!he_cap)
354 return false;
355
356 /* mcs_nss is right after he_cap info */
357 he_mcs_nss_supp = (void *)(he_cap + 1);
358
359 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
360 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
361
362 /* P802.11-REVme/D0.3
363 * 27.1.1 Introduction to the HE PHY
364 * ...
365 * An HE STA shall support the following features:
366 * ...
367 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
368 * supported channel widths for HE SU PPDUs
369 */
370 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
371 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
372 sdata_info(sdata,
373 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
374 mcs_80_map_tx, mcs_80_map_rx);
375 return false;
376 }
377
378 if (!he_op)
379 return true;
380
381 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
382
383 /*
384 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
385 * zeroes, which is nonsense, and completely inconsistent with itself
386 * (it doesn't have 8 streams). Accept the settings in this case anyway.
387 */
388 if (!ap_min_req_set)
389 return true;
390
391 /* make sure the AP is consistent with itself
392 *
393 * P802.11-REVme/D0.3
394 * 26.17.1 Basic HE BSS operation
395 *
396 * A STA that is operating in an HE BSS shall be able to receive and
397 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
398 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
399 * MLME-START.request primitive and shall be able to receive at each of
400 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
401 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
402 * primitive
403 */
404 for (nss = 8; nss > 0; nss--) {
405 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
406 u8 ap_rx_val;
407 u8 ap_tx_val;
408
409 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
410 continue;
411
412 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
413 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
414
415 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
416 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
417 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
418 sdata_info(sdata,
419 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
420 nss, ap_rx_val, ap_rx_val, ap_op_val);
421 return false;
422 }
423 }
424
425 return true;
426 }
427
428 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)429 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
430 struct ieee80211_supported_band *sband,
431 const struct ieee80211_he_operation *he_op)
432 {
433 const struct ieee80211_sta_he_cap *sta_he_cap =
434 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
435 u16 ap_min_req_set;
436 int i;
437
438 if (!sta_he_cap || !he_op)
439 return false;
440
441 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
442
443 /*
444 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all
445 * zeroes, which is nonsense, and completely inconsistent with itself
446 * (it doesn't have 8 streams). Accept the settings in this case anyway.
447 */
448 if (!ap_min_req_set)
449 return true;
450
451 /* Need to go over for 80MHz, 160MHz and for 80+80 */
452 for (i = 0; i < 3; i++) {
453 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp =
454 &sta_he_cap->he_mcs_nss_supp;
455 u16 sta_mcs_map_rx =
456 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]);
457 u16 sta_mcs_map_tx =
458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]);
459 u8 nss;
460 bool verified = true;
461
462 /*
463 * For each band there is a maximum of 8 spatial streams
464 * possible. Each of the sta_mcs_map_* is a 16-bit struct built
465 * of 2 bits per NSS (1-8), with the values defined in enum
466 * ieee80211_he_mcs_support. Need to make sure STA TX and RX
467 * capabilities aren't less than the AP's minimum requirements
468 * for this HE BSS per SS.
469 * It is enough to find one such band that meets the reqs.
470 */
471 for (nss = 8; nss > 0; nss--) {
472 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3;
473 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3;
474 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
475
476 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
477 continue;
478
479 /*
480 * Make sure the HE AP doesn't require MCSs that aren't
481 * supported by the client as required by spec
482 *
483 * P802.11-REVme/D0.3
484 * 26.17.1 Basic HE BSS operation
485 *
486 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
487 * a BSS, unless it supports (i.e., is able to both transmit and
488 * receive using) all of the <HE-MCS, NSS> tuples in the basic
489 * HE-MCS and NSS set.
490 */
491 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
492 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
493 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) {
494 verified = false;
495 break;
496 }
497 }
498
499 if (verified)
500 return true;
501 }
502
503 /* If here, STA doesn't meet AP's HE min requirements */
504 return false;
505 }
506
507 static u8
ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap * sta_he_cap,const struct ieee80211_sta_eht_cap * sta_eht_cap,unsigned int idx,int bw)508 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap,
509 const struct ieee80211_sta_eht_cap *sta_eht_cap,
510 unsigned int idx, int bw)
511 {
512 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0];
513 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0];
514
515 /* handle us being a 20 MHz-only EHT STA - with four values
516 * for MCS 0-7, 8-9, 10-11, 12-13.
517 */
518 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL))
519 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx];
520
521 /* the others have MCS 0-9 together, rather than separately from 0-7 */
522 if (idx > 0)
523 idx--;
524
525 switch (bw) {
526 case 0:
527 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx];
528 case 1:
529 if (!(he_phy_cap0 &
530 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
531 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)))
532 return 0xff; /* pass check */
533 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx];
534 case 2:
535 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ))
536 return 0xff; /* pass check */
537 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx];
538 }
539
540 WARN_ON(1);
541 return 0;
542 }
543
544 static bool
ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_eht_operation * eht_op)545 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata,
546 struct ieee80211_supported_band *sband,
547 const struct ieee80211_eht_operation *eht_op)
548 {
549 const struct ieee80211_sta_he_cap *sta_he_cap =
550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
551 const struct ieee80211_sta_eht_cap *sta_eht_cap =
552 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
553 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req;
554 unsigned int i;
555
556 if (!sta_he_cap || !sta_eht_cap || !eht_op)
557 return false;
558
559 req = &eht_op->basic_mcs_nss;
560
561 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) {
562 u8 req_rx_nss, req_tx_nss;
563 unsigned int bw;
564
565 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i],
566 IEEE80211_EHT_MCS_NSS_RX);
567 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i],
568 IEEE80211_EHT_MCS_NSS_TX);
569
570 for (bw = 0; bw < 3; bw++) {
571 u8 have, have_rx_nss, have_tx_nss;
572
573 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap,
574 sta_eht_cap,
575 i, bw);
576 have_rx_nss = u8_get_bits(have,
577 IEEE80211_EHT_MCS_NSS_RX);
578 have_tx_nss = u8_get_bits(have,
579 IEEE80211_EHT_MCS_NSS_TX);
580
581 if (req_rx_nss > have_rx_nss ||
582 req_tx_nss > have_tx_nss)
583 return false;
584 }
585 }
586
587 return true;
588 }
589
ieee80211_chandef_usable(struct ieee80211_sub_if_data * sdata,const struct cfg80211_chan_def * chandef,u32 prohibited_flags)590 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata,
591 const struct cfg80211_chan_def *chandef,
592 u32 prohibited_flags)
593 {
594 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy,
595 chandef, prohibited_flags))
596 return false;
597
598 if (chandef->punctured &&
599 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING))
600 return false;
601
602 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ &&
603 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ))
604 return false;
605
606 return true;
607 }
608
ieee80211_chandef_num_subchans(const struct cfg80211_chan_def * c)609 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c)
610 {
611 if (c->width == NL80211_CHAN_WIDTH_80P80)
612 return 4 + 4;
613
614 return nl80211_chan_width_to_mhz(c->width) / 20;
615 }
616
ieee80211_chandef_num_widths(const struct cfg80211_chan_def * c)617 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c)
618 {
619 switch (c->width) {
620 case NL80211_CHAN_WIDTH_20:
621 case NL80211_CHAN_WIDTH_20_NOHT:
622 return 1;
623 case NL80211_CHAN_WIDTH_40:
624 return 2;
625 case NL80211_CHAN_WIDTH_80P80:
626 case NL80211_CHAN_WIDTH_80:
627 return 3;
628 case NL80211_CHAN_WIDTH_160:
629 return 4;
630 case NL80211_CHAN_WIDTH_320:
631 return 5;
632 default:
633 WARN_ON(1);
634 return 0;
635 }
636 }
637
638 VISIBLE_IF_MAC80211_KUNIT int
ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def * ap,u8 n_partial_subchans)639 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap,
640 u8 n_partial_subchans)
641 {
642 int n = ieee80211_chandef_num_subchans(ap);
643 struct cfg80211_chan_def tmp = *ap;
644 int offset = 0;
645
646 /*
647 * Given a chandef (in this context, it's the AP's) and a number
648 * of subchannels that we want to look at ('n_partial_subchans'),
649 * calculate the offset in number of subchannels between the full
650 * and the subset with the desired width.
651 */
652
653 /* same number of subchannels means no offset, obviously */
654 if (n == n_partial_subchans)
655 return 0;
656
657 /* don't WARN - misconfigured APs could cause this if their N > width */
658 if (n < n_partial_subchans)
659 return 0;
660
661 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) {
662 u32 prev = tmp.center_freq1;
663
664 ieee80211_chandef_downgrade(&tmp, NULL);
665
666 /*
667 * if center_freq moved up, half the original channels
668 * are gone now but were below, so increase offset
669 */
670 if (prev < tmp.center_freq1)
671 offset += ieee80211_chandef_num_subchans(&tmp);
672 }
673
674 /*
675 * 80+80 with secondary 80 below primary - four subchannels for it
676 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp')
677 */
678 if (ap->width == NL80211_CHAN_WIDTH_80P80 &&
679 ap->center_freq2 < ap->center_freq1)
680 offset += 4;
681
682 return offset;
683 }
684 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset);
685
686 VISIBLE_IF_MAC80211_KUNIT void
ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd * psd,const struct cfg80211_chan_def * ap,const struct cfg80211_chan_def * used)687 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd,
688 const struct cfg80211_chan_def *ap,
689 const struct cfg80211_chan_def *used)
690 {
691 u8 needed = ieee80211_chandef_num_subchans(used);
692 u8 have = ieee80211_chandef_num_subchans(ap);
693 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ];
694 u8 offset;
695
696 if (!psd->valid)
697 return;
698
699 /* if N is zero, all defaults were used, no point in rearranging */
700 if (!psd->n)
701 goto out;
702
703 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power));
704
705 /*
706 * This assumes that 'N' is consistent with the HE channel, as
707 * it should be (otherwise the AP is broken).
708 *
709 * In psd->power we have values in the order 0..N, 0..K, where
710 * N+K should cover the entire channel per 'ap', but even if it
711 * doesn't then we've pre-filled 'unlimited' as defaults.
712 *
713 * But this is all the wrong order, we want to have them in the
714 * order of the 'used' channel.
715 *
716 * So for example, we could have a 320 MHz EHT AP, which has the
717 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't
718 * seem to be considered for the TPE), as follows:
719 *
720 * EHT 320: | | | | | | | | | | | | | | | | |
721 * HE 80: | | | | |
722 * used 160: | | | | | | | | |
723 *
724 * N entries: |--|--|--|--|
725 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--|
726 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15
727 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
728 * used chan: 0 1 2 3 4 5 6 7
729 *
730 * The idx in the power array ('power idx') is like this since it
731 * comes directly from the element's N and K entries in their
732 * element order, and those are this way for HE compatibility.
733 *
734 * Rearrange them as desired here, first by putting them into the
735 * 'full chan' order, and then selecting the necessary subset for
736 * the 'used chan'.
737 */
738
739 /* first reorder according to AP channel */
740 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n);
741 for (int i = 0; i < have; i++) {
742 if (i < offset)
743 tmp[i] = psd->power[i + psd->n];
744 else if (i < offset + psd->n)
745 tmp[i] = psd->power[i - offset];
746 else
747 tmp[i] = psd->power[i];
748 }
749
750 /*
751 * and then select the subset for the used channel
752 * (set everything to defaults first in case a driver is confused)
753 */
754 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power));
755 offset = ieee80211_calc_chandef_subchan_offset(ap, needed);
756 for (int i = 0; i < needed; i++)
757 psd->power[i] = tmp[offset + i];
758
759 out:
760 /* limit, but don't lie if there are defaults in the data */
761 if (needed < psd->count)
762 psd->count = needed;
763 }
764 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd);
765
ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe * tpe,const struct cfg80211_chan_def * ap,const struct cfg80211_chan_def * used)766 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe,
767 const struct cfg80211_chan_def *ap,
768 const struct cfg80211_chan_def *used)
769 {
770 /* ignore this completely for narrow/invalid channels */
771 if (!ieee80211_chandef_num_subchans(ap) ||
772 !ieee80211_chandef_num_subchans(used)) {
773 ieee80211_clear_tpe(tpe);
774 return;
775 }
776
777 for (int i = 0; i < 2; i++) {
778 int needed_pwr_count;
779
780 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used);
781 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used);
782
783 /* limit this to the widths we actually need */
784 needed_pwr_count = ieee80211_chandef_num_widths(used);
785 if (needed_pwr_count < tpe->max_local[i].count)
786 tpe->max_local[i].count = needed_pwr_count;
787 if (needed_pwr_count < tpe->max_reg_client[i].count)
788 tpe->max_reg_client[i].count = needed_pwr_count;
789 }
790 }
791
792 /*
793 * The AP part of the channel request is used to distinguish settings
794 * to the device used for wider bandwidth OFDMA. This is used in the
795 * channel context code to assign two channel contexts even if they're
796 * both for the same channel, if the AP bandwidths are incompatible.
797 * If not EHT (or driver override) then ap.chan == NULL indicates that
798 * there's no wider BW OFDMA used.
799 */
ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data * sdata,struct ieee80211_chan_req * chanreq,struct ieee80211_conn_settings * conn,struct cfg80211_chan_def * ap_chandef)800 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata,
801 struct ieee80211_chan_req *chanreq,
802 struct ieee80211_conn_settings *conn,
803 struct cfg80211_chan_def *ap_chandef)
804 {
805 chanreq->ap.chan = NULL;
806
807 if (conn->mode < IEEE80211_CONN_MODE_EHT)
808 return;
809 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)
810 return;
811
812 chanreq->ap = *ap_chandef;
813 }
814
815 static struct ieee802_11_elems *
ieee80211_determine_chan_mode(struct ieee80211_sub_if_data * sdata,struct ieee80211_conn_settings * conn,struct cfg80211_bss * cbss,int link_id,struct ieee80211_chan_req * chanreq,struct cfg80211_chan_def * ap_chandef)816 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata,
817 struct ieee80211_conn_settings *conn,
818 struct cfg80211_bss *cbss, int link_id,
819 struct ieee80211_chan_req *chanreq,
820 struct cfg80211_chan_def *ap_chandef)
821 {
822 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies);
823 struct ieee80211_bss *bss = (void *)cbss->priv;
824 struct ieee80211_channel *channel = cbss->channel;
825 struct ieee80211_elems_parse_params parse_params = {
826 .link_id = -1,
827 .from_ap = true,
828 .start = ies->data,
829 .len = ies->len,
830 };
831 struct ieee802_11_elems *elems;
832 struct ieee80211_supported_band *sband;
833 enum ieee80211_conn_mode ap_mode;
834 int ret;
835
836 again:
837 parse_params.mode = conn->mode;
838 elems = ieee802_11_parse_elems_full(&parse_params);
839 if (!elems)
840 return ERR_PTR(-ENOMEM);
841
842 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info,
843 elems, false, conn, ap_chandef);
844
845 /* this should be impossible since parsing depends on our mode */
846 if (WARN_ON(ap_mode > conn->mode)) {
847 ret = -EINVAL;
848 goto free;
849 }
850
851 if (conn->mode != ap_mode) {
852 conn->mode = ap_mode;
853 kfree(elems);
854 goto again;
855 }
856
857 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n",
858 cbss->bssid, ieee80211_conn_mode_str(ap_mode));
859
860 sband = sdata->local->hw.wiphy->bands[channel->band];
861
862 switch (channel->band) {
863 case NL80211_BAND_S1GHZ:
864 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) {
865 ret = -EINVAL;
866 goto free;
867 }
868 return elems;
869 case NL80211_BAND_6GHZ:
870 if (ap_mode < IEEE80211_CONN_MODE_HE) {
871 sdata_info(sdata,
872 "Rejecting non-HE 6/7 GHz connection");
873 ret = -EINVAL;
874 goto free;
875 }
876 break;
877 default:
878 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) {
879 ret = -EINVAL;
880 goto free;
881 }
882 }
883
884 switch (ap_mode) {
885 case IEEE80211_CONN_MODE_S1G:
886 WARN_ON(1);
887 ret = -EINVAL;
888 goto free;
889 case IEEE80211_CONN_MODE_LEGACY:
890 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
891 break;
892 case IEEE80211_CONN_MODE_HT:
893 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
894 conn->bw_limit,
895 IEEE80211_CONN_BW_LIMIT_40);
896 break;
897 case IEEE80211_CONN_MODE_VHT:
898 case IEEE80211_CONN_MODE_HE:
899 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
900 conn->bw_limit,
901 IEEE80211_CONN_BW_LIMIT_160);
902 break;
903 case IEEE80211_CONN_MODE_EHT:
904 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
905 conn->bw_limit,
906 IEEE80211_CONN_BW_LIMIT_320);
907 break;
908 }
909
910 chanreq->oper = *ap_chandef;
911
912 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef);
913
914 while (!ieee80211_chandef_usable(sdata, &chanreq->oper,
915 IEEE80211_CHAN_DISABLED)) {
916 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) {
917 ret = -EINVAL;
918 goto free;
919 }
920
921 ieee80211_chanreq_downgrade(chanreq, conn);
922 }
923
924 if (conn->mode >= IEEE80211_CONN_MODE_HE &&
925 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper,
926 IEEE80211_CHAN_NO_HE)) {
927 conn->mode = IEEE80211_CONN_MODE_VHT;
928 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
929 conn->bw_limit,
930 IEEE80211_CONN_BW_LIMIT_160);
931 }
932
933 if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
934 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper,
935 IEEE80211_CHAN_NO_EHT)) {
936 conn->mode = IEEE80211_CONN_MODE_HE;
937 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
938 conn->bw_limit,
939 IEEE80211_CONN_BW_LIMIT_160);
940 }
941
942 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode)
943 sdata_info(sdata,
944 "regulatory prevented using AP config, downgraded\n");
945
946 if (conn->mode >= IEEE80211_CONN_MODE_HE &&
947 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap,
948 elems->he_operation) ||
949 !ieee80211_verify_sta_he_mcs_support(sdata, sband,
950 elems->he_operation))) {
951 conn->mode = IEEE80211_CONN_MODE_VHT;
952 sdata_info(sdata, "required MCSes not supported, disabling HE\n");
953 }
954
955 if (conn->mode >= IEEE80211_CONN_MODE_EHT &&
956 !ieee80211_verify_sta_eht_mcs_support(sdata, sband,
957 elems->eht_operation)) {
958 conn->mode = IEEE80211_CONN_MODE_HE;
959 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
960 conn->bw_limit,
961 IEEE80211_CONN_BW_LIMIT_160);
962 sdata_info(sdata, "required MCSes not supported, disabling EHT\n");
963 }
964
965 /* the mode can only decrease, so this must terminate */
966 if (ap_mode != conn->mode) {
967 kfree(elems);
968 goto again;
969 }
970
971 mlme_link_id_dbg(sdata, link_id,
972 "connecting with %s mode, max bandwidth %d MHz\n",
973 ieee80211_conn_mode_str(conn->mode),
974 20 * (1 << conn->bw_limit));
975
976 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) {
977 ret = -EINVAL;
978 goto free;
979 }
980
981 return elems;
982 free:
983 kfree(elems);
984 return ERR_PTR(ret);
985 }
986
ieee80211_config_bw(struct ieee80211_link_data * link,struct ieee802_11_elems * elems,bool update,u64 * changed)987 static int ieee80211_config_bw(struct ieee80211_link_data *link,
988 struct ieee802_11_elems *elems,
989 bool update, u64 *changed)
990 {
991 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan;
992 struct ieee80211_sub_if_data *sdata = link->sdata;
993 struct ieee80211_chan_req chanreq = {};
994 struct cfg80211_chan_def ap_chandef;
995 enum ieee80211_conn_mode ap_mode;
996 u32 vht_cap_info = 0;
997 u16 ht_opmode;
998 int ret;
999
1000 /* don't track any bandwidth changes in legacy/S1G modes */
1001 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY ||
1002 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G)
1003 return 0;
1004
1005 if (elems->vht_cap_elem)
1006 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1007
1008 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info,
1009 elems, true, &link->u.mgd.conn,
1010 &ap_chandef);
1011
1012 if (ap_mode != link->u.mgd.conn.mode) {
1013 link_info(link,
1014 "AP appears to change mode (expected %s, found %s), disconnect\n",
1015 ieee80211_conn_mode_str(link->u.mgd.conn.mode),
1016 ieee80211_conn_mode_str(ap_mode));
1017 return -EINVAL;
1018 }
1019
1020 chanreq.oper = ap_chandef;
1021 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn,
1022 &ap_chandef);
1023
1024 /*
1025 * if HT operation mode changed store the new one -
1026 * this may be applicable even if channel is identical
1027 */
1028 if (elems->ht_operation) {
1029 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode);
1030 if (link->conf->ht_operation_mode != ht_opmode) {
1031 *changed |= BSS_CHANGED_HT;
1032 link->conf->ht_operation_mode = ht_opmode;
1033 }
1034 }
1035
1036 /*
1037 * Downgrade the new channel if we associated with restricted
1038 * bandwidth capabilities. For example, if we associated as a
1039 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities
1040 * or config reasons) then switching to a 40 MHz channel now
1041 * won't do us any good -- we couldn't use it with the AP.
1042 */
1043 while (link->u.mgd.conn.bw_limit <
1044 ieee80211_min_bw_limit_from_chandef(&chanreq.oper))
1045 ieee80211_chandef_downgrade(&chanreq.oper, NULL);
1046
1047 if (ap_chandef.chan->band == NL80211_BAND_6GHZ &&
1048 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
1049 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef,
1050 &chanreq.oper);
1051 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) {
1052 link->conf->tpe = elems->tpe;
1053 *changed |= BSS_CHANGED_TPE;
1054 }
1055 }
1056
1057 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq))
1058 return 0;
1059
1060 link_info(link,
1061 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n",
1062 link->u.mgd.bssid, chanreq.oper.chan->center_freq,
1063 chanreq.oper.chan->freq_offset, chanreq.oper.width,
1064 chanreq.oper.center_freq1, chanreq.oper.freq1_offset,
1065 chanreq.oper.center_freq2);
1066
1067 if (!cfg80211_chandef_valid(&chanreq.oper)) {
1068 sdata_info(sdata,
1069 "AP %pM changed caps/bw in a way we can't support - disconnect\n",
1070 link->u.mgd.bssid);
1071 return -EINVAL;
1072 }
1073
1074 if (!update) {
1075 link->conf->chanreq = chanreq;
1076 return 0;
1077 }
1078
1079 /*
1080 * We're tracking the current AP here, so don't do any further checks
1081 * here. This keeps us from playing ping-pong with regulatory, without
1082 * it the following can happen (for example):
1083 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
1084 * - AP advertises regdom US
1085 * - CRDA loads regdom US with 80 MHz prohibited (old database)
1086 * - we detect an unsupported channel and disconnect
1087 * - disconnect causes CRDA to reload world regdomain and the game
1088 * starts anew.
1089 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
1090 *
1091 * It seems possible that there are still scenarios with CSA or real
1092 * bandwidth changes where a this could happen, but those cases are
1093 * less common and wouldn't completely prevent using the AP.
1094 */
1095
1096 ret = ieee80211_link_change_chanreq(link, &chanreq, changed);
1097 if (ret) {
1098 sdata_info(sdata,
1099 "AP %pM changed bandwidth to incompatible one - disconnect\n",
1100 link->u.mgd.bssid);
1101 return ret;
1102 }
1103
1104 cfg80211_schedule_channels_check(&sdata->wdev);
1105 return 0;
1106 }
1107
1108 /* frame sending functions */
1109
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,const struct ieee80211_conn_settings * conn)1110 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
1111 struct sk_buff *skb, u8 ap_ht_param,
1112 struct ieee80211_supported_band *sband,
1113 struct ieee80211_channel *channel,
1114 enum ieee80211_smps_mode smps,
1115 const struct ieee80211_conn_settings *conn)
1116 {
1117 u8 *pos;
1118 u32 flags = channel->flags;
1119 u16 cap;
1120 struct ieee80211_sta_ht_cap ht_cap;
1121
1122 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
1123
1124 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
1125 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
1126
1127 /* determine capability flags */
1128 cap = ht_cap.cap;
1129
1130 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1131 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1132 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
1133 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1134 cap &= ~IEEE80211_HT_CAP_SGI_40;
1135 }
1136 break;
1137 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1138 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
1139 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1140 cap &= ~IEEE80211_HT_CAP_SGI_40;
1141 }
1142 break;
1143 }
1144
1145 /*
1146 * If 40 MHz was disabled associate as though we weren't
1147 * capable of 40 MHz -- some broken APs will never fall
1148 * back to trying to transmit in 20 MHz.
1149 */
1150 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) {
1151 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1152 cap &= ~IEEE80211_HT_CAP_SGI_40;
1153 }
1154
1155 /* set SM PS mode properly */
1156 cap &= ~IEEE80211_HT_CAP_SM_PS;
1157 switch (smps) {
1158 case IEEE80211_SMPS_AUTOMATIC:
1159 case IEEE80211_SMPS_NUM_MODES:
1160 WARN_ON(1);
1161 fallthrough;
1162 case IEEE80211_SMPS_OFF:
1163 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1164 IEEE80211_HT_CAP_SM_PS_SHIFT;
1165 break;
1166 case IEEE80211_SMPS_STATIC:
1167 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
1168 IEEE80211_HT_CAP_SM_PS_SHIFT;
1169 break;
1170 case IEEE80211_SMPS_DYNAMIC:
1171 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
1172 IEEE80211_HT_CAP_SM_PS_SHIFT;
1173 break;
1174 }
1175
1176 /* reserve and fill IE */
1177 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
1178 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
1179 }
1180
1181 /* This function determines vht capability flags for the association
1182 * and builds the IE.
1183 * Note - the function returns true to own the MU-MIMO capability
1184 */
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,const struct ieee80211_conn_settings * conn)1185 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
1186 struct sk_buff *skb,
1187 struct ieee80211_supported_band *sband,
1188 struct ieee80211_vht_cap *ap_vht_cap,
1189 const struct ieee80211_conn_settings *conn)
1190 {
1191 struct ieee80211_local *local = sdata->local;
1192 u8 *pos;
1193 u32 cap;
1194 struct ieee80211_sta_vht_cap vht_cap;
1195 u32 mask, ap_bf_sts, our_bf_sts;
1196 bool mu_mimo_owner = false;
1197
1198 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
1199
1200 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
1201 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
1202
1203 /* determine capability flags */
1204 cap = vht_cap.cap;
1205
1206 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) {
1207 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
1208 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
1209 }
1210
1211 /*
1212 * Some APs apparently get confused if our capabilities are better
1213 * than theirs, so restrict what we advertise in the assoc request.
1214 */
1215 if (!(ap_vht_cap->vht_cap_info &
1216 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
1217 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
1218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
1219 else if (!(ap_vht_cap->vht_cap_info &
1220 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
1221 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
1222
1223 /*
1224 * If some other vif is using the MU-MIMO capability we cannot associate
1225 * using MU-MIMO - this will lead to contradictions in the group-id
1226 * mechanism.
1227 * Ownership is defined since association request, in order to avoid
1228 * simultaneous associations with MU-MIMO.
1229 */
1230 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
1231 bool disable_mu_mimo = false;
1232 struct ieee80211_sub_if_data *other;
1233
1234 list_for_each_entry_rcu(other, &local->interfaces, list) {
1235 if (other->vif.bss_conf.mu_mimo_owner) {
1236 disable_mu_mimo = true;
1237 break;
1238 }
1239 }
1240 if (disable_mu_mimo)
1241 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
1242 else
1243 mu_mimo_owner = true;
1244 }
1245
1246 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
1247
1248 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
1249 our_bf_sts = cap & mask;
1250
1251 if (ap_bf_sts < our_bf_sts) {
1252 cap &= ~mask;
1253 cap |= ap_bf_sts;
1254 }
1255
1256 /* reserve and fill IE */
1257 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
1258 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
1259
1260 return mu_mimo_owner;
1261 }
1262
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)1263 static void ieee80211_assoc_add_rates(struct sk_buff *skb,
1264 enum nl80211_chan_width width,
1265 struct ieee80211_supported_band *sband,
1266 struct ieee80211_mgd_assoc_data *assoc_data)
1267 {
1268 u32 rates;
1269
1270 if (assoc_data->supp_rates_len) {
1271 /*
1272 * Get all rates supported by the device and the AP as
1273 * some APs don't like getting a superset of their rates
1274 * in the association request (e.g. D-Link DAP 1353 in
1275 * b-only mode)...
1276 */
1277 ieee80211_parse_bitrates(width, sband,
1278 assoc_data->supp_rates,
1279 assoc_data->supp_rates_len,
1280 &rates);
1281 } else {
1282 /*
1283 * In case AP not provide any supported rates information
1284 * before association, we send information element(s) with
1285 * all rates that we support.
1286 */
1287 rates = ~0;
1288 }
1289
1290 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates,
1291 WLAN_EID_SUPP_RATES);
1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates,
1293 WLAN_EID_EXT_SUPP_RATES);
1294 }
1295
ieee80211_add_before_ht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)1296 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb,
1297 const u8 *elems,
1298 size_t elems_len,
1299 size_t offset)
1300 {
1301 size_t noffset;
1302
1303 static const u8 before_ht[] = {
1304 WLAN_EID_SSID,
1305 WLAN_EID_SUPP_RATES,
1306 WLAN_EID_EXT_SUPP_RATES,
1307 WLAN_EID_PWR_CAPABILITY,
1308 WLAN_EID_SUPPORTED_CHANNELS,
1309 WLAN_EID_RSN,
1310 WLAN_EID_QOS_CAPA,
1311 WLAN_EID_RRM_ENABLED_CAPABILITIES,
1312 WLAN_EID_MOBILITY_DOMAIN,
1313 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
1314 WLAN_EID_RIC_DATA, /* reassoc only */
1315 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1316 };
1317 static const u8 after_ric[] = {
1318 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1319 WLAN_EID_HT_CAPABILITY,
1320 WLAN_EID_BSS_COEX_2040,
1321 /* luckily this is almost always there */
1322 WLAN_EID_EXT_CAPABILITY,
1323 WLAN_EID_QOS_TRAFFIC_CAPA,
1324 WLAN_EID_TIM_BCAST_REQ,
1325 WLAN_EID_INTERWORKING,
1326 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1327 WLAN_EID_VHT_CAPABILITY,
1328 WLAN_EID_OPMODE_NOTIF,
1329 };
1330
1331 if (!elems_len)
1332 return offset;
1333
1334 noffset = ieee80211_ie_split_ric(elems, elems_len,
1335 before_ht,
1336 ARRAY_SIZE(before_ht),
1337 after_ric,
1338 ARRAY_SIZE(after_ric),
1339 offset);
1340 skb_put_data(skb, elems + offset, noffset - offset);
1341
1342 return noffset;
1343 }
1344
ieee80211_add_before_vht_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)1345 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb,
1346 const u8 *elems,
1347 size_t elems_len,
1348 size_t offset)
1349 {
1350 static const u8 before_vht[] = {
1351 /*
1352 * no need to list the ones split off before HT
1353 * or generated here
1354 */
1355 WLAN_EID_BSS_COEX_2040,
1356 WLAN_EID_EXT_CAPABILITY,
1357 WLAN_EID_QOS_TRAFFIC_CAPA,
1358 WLAN_EID_TIM_BCAST_REQ,
1359 WLAN_EID_INTERWORKING,
1360 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1361 };
1362 size_t noffset;
1363
1364 if (!elems_len)
1365 return offset;
1366
1367 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
1368 noffset = ieee80211_ie_split(elems, elems_len,
1369 before_vht, ARRAY_SIZE(before_vht),
1370 offset);
1371 skb_put_data(skb, elems + offset, noffset - offset);
1372
1373 return noffset;
1374 }
1375
ieee80211_add_before_he_elems(struct sk_buff * skb,const u8 * elems,size_t elems_len,size_t offset)1376 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb,
1377 const u8 *elems,
1378 size_t elems_len,
1379 size_t offset)
1380 {
1381 static const u8 before_he[] = {
1382 /*
1383 * no need to list the ones split off before VHT
1384 * or generated here
1385 */
1386 WLAN_EID_OPMODE_NOTIF,
1387 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE,
1388 /* 11ai elements */
1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION,
1390 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY,
1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM,
1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER,
1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN,
1394 /* TODO: add 11ah/11aj/11ak elements */
1395 };
1396 size_t noffset;
1397
1398 if (!elems_len)
1399 return offset;
1400
1401 /* RIC already taken care of in ieee80211_add_before_ht_elems() */
1402 noffset = ieee80211_ie_split(elems, elems_len,
1403 before_he, ARRAY_SIZE(before_he),
1404 offset);
1405 skb_put_data(skb, elems + offset, noffset - offset);
1406
1407 return noffset;
1408 }
1409
1410 #define PRESENT_ELEMS_MAX 8
1411 #define PRESENT_ELEM_EXT_OFFS 0x100
1412
1413 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1414 struct sk_buff *skb, u16 capab,
1415 const struct element *ext_capa,
1416 const u16 *present_elems);
1417
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)1418 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata,
1419 struct sk_buff *skb, u16 *capab,
1420 const struct element *ext_capa,
1421 const u8 *extra_elems,
1422 size_t extra_elems_len,
1423 unsigned int link_id,
1424 struct ieee80211_link_data *link,
1425 u16 *present_elems)
1426 {
1427 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1429 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1430 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1431 struct ieee80211_channel *chan = cbss->channel;
1432 const struct ieee80211_sband_iftype_data *iftd;
1433 struct ieee80211_local *local = sdata->local;
1434 struct ieee80211_supported_band *sband;
1435 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20;
1436 struct ieee80211_chanctx_conf *chanctx_conf;
1437 enum ieee80211_smps_mode smps_mode;
1438 u16 orig_capab = *capab;
1439 size_t offset = 0;
1440 int present_elems_len = 0;
1441 u8 *pos;
1442 int i;
1443
1444 #define ADD_PRESENT_ELEM(id) do { \
1445 /* need a last for termination - we use 0 == SSID */ \
1446 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \
1447 present_elems[present_elems_len++] = (id); \
1448 } while (0)
1449 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
1450
1451 if (link)
1452 smps_mode = link->smps_mode;
1453 else if (sdata->u.mgd.powersave)
1454 smps_mode = IEEE80211_SMPS_DYNAMIC;
1455 else
1456 smps_mode = IEEE80211_SMPS_OFF;
1457
1458 if (link) {
1459 /*
1460 * 5/10 MHz scenarios are only viable without MLO, in which
1461 * case this pointer should be used ... All of this is a bit
1462 * unclear though, not sure this even works at all.
1463 */
1464 rcu_read_lock();
1465 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1466 if (chanctx_conf)
1467 width = chanctx_conf->def.width;
1468 rcu_read_unlock();
1469 }
1470
1471 sband = local->hw.wiphy->bands[chan->band];
1472 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1473
1474 if (sband->band == NL80211_BAND_2GHZ) {
1475 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
1476 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
1477 }
1478
1479 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
1480 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
1481 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
1482
1483 if (sband->band != NL80211_BAND_S1GHZ)
1484 ieee80211_assoc_add_rates(skb, width, sband, assoc_data);
1485
1486 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
1487 *capab & WLAN_CAPABILITY_RADIO_MEASURE) {
1488 struct cfg80211_chan_def chandef = {
1489 .width = width,
1490 .chan = chan,
1491 };
1492
1493 pos = skb_put(skb, 4);
1494 *pos++ = WLAN_EID_PWR_CAPABILITY;
1495 *pos++ = 2;
1496 *pos++ = 0; /* min tx power */
1497 /* max tx power */
1498 *pos++ = ieee80211_chandef_max_power(&chandef);
1499 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
1500 }
1501
1502 /*
1503 * Per spec, we shouldn't include the list of channels if we advertise
1504 * support for extended channel switching, but we've always done that;
1505 * (for now?) apply this restriction only on the (new) 6 GHz band.
1506 */
1507 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT &&
1508 (sband->band != NL80211_BAND_6GHZ ||
1509 !ext_capa || ext_capa->datalen < 1 ||
1510 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) {
1511 /* TODO: get this in reg domain format */
1512 pos = skb_put(skb, 2 * sband->n_channels + 2);
1513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
1514 *pos++ = 2 * sband->n_channels;
1515 for (i = 0; i < sband->n_channels; i++) {
1516 int cf = sband->channels[i].center_freq;
1517
1518 *pos++ = ieee80211_frequency_to_channel(cf);
1519 *pos++ = 1; /* one channel in the subband*/
1520 }
1521 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
1522 }
1523
1524 /* if present, add any custom IEs that go before HT */
1525 offset = ieee80211_add_before_ht_elems(skb, extra_elems,
1526 extra_elems_len,
1527 offset);
1528
1529 if (sband->band != NL80211_BAND_6GHZ &&
1530 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) {
1531 ieee80211_add_ht_ie(sdata, skb,
1532 assoc_data->link[link_id].ap_ht_param,
1533 sband, chan, smps_mode,
1534 &assoc_data->link[link_id].conn);
1535 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
1536 }
1537
1538 /* if present, add any custom IEs that go before VHT */
1539 offset = ieee80211_add_before_vht_elems(skb, extra_elems,
1540 extra_elems_len,
1541 offset);
1542
1543 if (sband->band != NL80211_BAND_6GHZ &&
1544 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT &&
1545 sband->vht_cap.vht_supported) {
1546 bool mu_mimo_owner =
1547 ieee80211_add_vht_ie(sdata, skb, sband,
1548 &assoc_data->link[link_id].ap_vht_cap,
1549 &assoc_data->link[link_id].conn);
1550
1551 if (link)
1552 link->conf->mu_mimo_owner = mu_mimo_owner;
1553 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);
1554 }
1555
1556 /* if present, add any custom IEs that go before HE */
1557 offset = ieee80211_add_before_he_elems(skb, extra_elems,
1558 extra_elems_len,
1559 offset);
1560
1561 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) {
1562 ieee80211_put_he_cap(skb, sdata, sband,
1563 &assoc_data->link[link_id].conn);
1564 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY);
1565 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode);
1566 }
1567
1568 /*
1569 * careful - need to know about all the present elems before
1570 * calling ieee80211_assoc_add_ml_elem(), so add this one if
1571 * we're going to put it after the ML element
1572 */
1573 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT)
1574 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY);
1575
1576 if (link_id == assoc_data->assoc_link_id)
1577 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa,
1578 present_elems);
1579
1580 /* crash if somebody gets it wrong */
1581 present_elems = NULL;
1582
1583 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT)
1584 ieee80211_put_eht_cap(skb, sdata, sband,
1585 &assoc_data->link[link_id].conn);
1586
1587 if (sband->band == NL80211_BAND_S1GHZ) {
1588 ieee80211_add_aid_request_ie(sdata, skb);
1589 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb);
1590 }
1591
1592 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len)
1593 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len);
1594
1595 return offset;
1596 }
1597
ieee80211_add_non_inheritance_elem(struct sk_buff * skb,const u16 * outer,const u16 * inner)1598 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb,
1599 const u16 *outer,
1600 const u16 *inner)
1601 {
1602 unsigned int skb_len = skb->len;
1603 bool at_extension = false;
1604 bool added = false;
1605 int i, j;
1606 u8 *len, *list_len = NULL;
1607
1608 skb_put_u8(skb, WLAN_EID_EXTENSION);
1609 len = skb_put(skb, 1);
1610 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE);
1611
1612 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) {
1613 u16 elem = outer[i];
1614 bool have_inner = false;
1615
1616 /* should at least be sorted in the sense of normal -> ext */
1617 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS);
1618
1619 /* switch to extension list */
1620 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) {
1621 at_extension = true;
1622 if (!list_len)
1623 skb_put_u8(skb, 0);
1624 list_len = NULL;
1625 }
1626
1627 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) {
1628 if (elem == inner[j]) {
1629 have_inner = true;
1630 break;
1631 }
1632 }
1633
1634 if (have_inner)
1635 continue;
1636
1637 if (!list_len) {
1638 list_len = skb_put(skb, 1);
1639 *list_len = 0;
1640 }
1641 *list_len += 1;
1642 skb_put_u8(skb, (u8)elem);
1643 added = true;
1644 }
1645
1646 /* if we added a list but no extension list, make a zero-len one */
1647 if (added && (!at_extension || !list_len))
1648 skb_put_u8(skb, 0);
1649
1650 /* if nothing added remove extension element completely */
1651 if (!added)
1652 skb_trim(skb, skb_len);
1653 else
1654 *len = skb->len - skb_len - 2;
1655 }
1656
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)1657 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata,
1658 struct sk_buff *skb, u16 capab,
1659 const struct element *ext_capa,
1660 const u16 *outer_present_elems)
1661 {
1662 struct ieee80211_local *local = sdata->local;
1663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1664 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1665 struct ieee80211_multi_link_elem *ml_elem;
1666 struct ieee80211_mle_basic_common_info *common;
1667 const struct wiphy_iftype_ext_capab *ift_ext_capa;
1668 __le16 eml_capa = 0, mld_capa_ops = 0;
1669 unsigned int link_id;
1670 u8 *ml_elem_len;
1671 void *capab_pos;
1672
1673 if (!ieee80211_vif_is_mld(&sdata->vif))
1674 return;
1675
1676 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy,
1677 ieee80211_vif_type_p2p(&sdata->vif));
1678 if (ift_ext_capa) {
1679 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities);
1680 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops);
1681 }
1682
1683 skb_put_u8(skb, WLAN_EID_EXTENSION);
1684 ml_elem_len = skb_put(skb, 1);
1685 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
1686 ml_elem = skb_put(skb, sizeof(*ml_elem));
1687 ml_elem->control =
1688 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
1689 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP);
1690 common = skb_put(skb, sizeof(*common));
1691 common->len = sizeof(*common) +
1692 2; /* MLD capa/ops */
1693 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1694
1695 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */
1696 if (eml_capa &
1697 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP |
1698 IEEE80211_EML_CAP_EMLMR_SUPPORT))) {
1699 common->len += 2; /* EML capabilities */
1700 ml_elem->control |=
1701 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA);
1702 skb_put_data(skb, &eml_capa, sizeof(eml_capa));
1703 }
1704 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops));
1705
1706 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1707 u16 link_present_elems[PRESENT_ELEMS_MAX] = {};
1708 const u8 *extra_elems;
1709 size_t extra_elems_len;
1710 size_t extra_used;
1711 u8 *subelem_len = NULL;
1712 __le16 ctrl;
1713
1714 if (!assoc_data->link[link_id].bss ||
1715 link_id == assoc_data->assoc_link_id)
1716 continue;
1717
1718 extra_elems = assoc_data->link[link_id].elems;
1719 extra_elems_len = assoc_data->link[link_id].elems_len;
1720
1721 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
1722 subelem_len = skb_put(skb, 1);
1723
1724 ctrl = cpu_to_le16(link_id |
1725 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
1726 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT);
1727 skb_put_data(skb, &ctrl, sizeof(ctrl));
1728 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */
1729 skb_put_data(skb, assoc_data->link[link_id].addr,
1730 ETH_ALEN);
1731 /*
1732 * Now add the contents of the (re)association request,
1733 * but the "listen interval" and "current AP address"
1734 * (if applicable) are skipped. So we only have
1735 * the capability field (remember the position and fill
1736 * later), followed by the elements added below by
1737 * calling ieee80211_assoc_link_elems().
1738 */
1739 capab_pos = skb_put(skb, 2);
1740
1741 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab,
1742 ext_capa,
1743 extra_elems,
1744 extra_elems_len,
1745 link_id, NULL,
1746 link_present_elems);
1747 if (extra_elems)
1748 skb_put_data(skb, extra_elems + extra_used,
1749 extra_elems_len - extra_used);
1750
1751 put_unaligned_le16(capab, capab_pos);
1752
1753 ieee80211_add_non_inheritance_elem(skb, outer_present_elems,
1754 link_present_elems);
1755
1756 ieee80211_fragment_element(skb, subelem_len,
1757 IEEE80211_MLE_SUBELEM_FRAGMENT);
1758 }
1759
1760 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT);
1761 }
1762
ieee80211_send_assoc(struct ieee80211_sub_if_data * sdata)1763 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
1764 {
1765 struct ieee80211_local *local = sdata->local;
1766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1767 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
1768 struct ieee80211_link_data *link;
1769 struct sk_buff *skb;
1770 struct ieee80211_mgmt *mgmt;
1771 u8 *pos, qos_info, *ie_start;
1772 size_t offset, noffset;
1773 u16 capab = 0, link_capab;
1774 __le16 listen_int;
1775 struct element *ext_capa = NULL;
1776 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
1777 struct ieee80211_prep_tx_info info = {};
1778 unsigned int link_id, n_links = 0;
1779 u16 present_elems[PRESENT_ELEMS_MAX] = {};
1780 void *capab_pos;
1781 size_t size;
1782 int ret;
1783
1784 /* we know it's writable, cast away the const */
1785 if (assoc_data->ie_len)
1786 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
1787 assoc_data->ie,
1788 assoc_data->ie_len);
1789
1790 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1791
1792 size = local->hw.extra_tx_headroom +
1793 sizeof(*mgmt) + /* bit too much but doesn't matter */
1794 2 + assoc_data->ssid_len + /* SSID */
1795 assoc_data->ie_len + /* extra IEs */
1796 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
1797 9; /* WMM */
1798
1799 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
1800 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
1801 const struct ieee80211_sband_iftype_data *iftd;
1802 struct ieee80211_supported_band *sband;
1803
1804 if (!cbss)
1805 continue;
1806
1807 sband = local->hw.wiphy->bands[cbss->channel->band];
1808
1809 n_links++;
1810 /* add STA profile elements length */
1811 size += assoc_data->link[link_id].elems_len;
1812 /* and supported rates length */
1813 size += 4 + sband->n_bitrates;
1814 /* supported channels */
1815 size += 2 + 2 * sband->n_channels;
1816
1817 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
1818 if (iftd)
1819 size += iftd->vendor_elems.len;
1820
1821 /* power capability */
1822 size += 4;
1823
1824 /* HT, VHT, HE, EHT */
1825 size += 2 + sizeof(struct ieee80211_ht_cap);
1826 size += 2 + sizeof(struct ieee80211_vht_cap);
1827 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
1828 sizeof(struct ieee80211_he_mcs_nss_supp) +
1829 IEEE80211_HE_PPE_THRES_MAX_LEN;
1830
1831 if (sband->band == NL80211_BAND_6GHZ)
1832 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa);
1833
1834 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
1835 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1836 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1837
1838 /* non-inheritance element */
1839 size += 2 + 2 + PRESENT_ELEMS_MAX;
1840
1841 /* should be the same across all BSSes */
1842 if (cbss->capability & WLAN_CAPABILITY_PRIVACY)
1843 capab |= WLAN_CAPABILITY_PRIVACY;
1844 }
1845
1846 if (ieee80211_vif_is_mld(&sdata->vif)) {
1847 /* consider the multi-link element with STA profile */
1848 size += sizeof(struct ieee80211_multi_link_elem);
1849 /* max common info field in basic multi-link element */
1850 size += sizeof(struct ieee80211_mle_basic_common_info) +
1851 2 + /* capa & op */
1852 2; /* EML capa */
1853
1854 /*
1855 * The capability elements were already considered above;
1856 * note this over-estimates a bit because there's no
1857 * STA profile for the assoc link.
1858 */
1859 size += (n_links - 1) *
1860 (1 + 1 + /* subelement ID/length */
1861 2 + /* STA control */
1862 1 + ETH_ALEN + 2 /* STA Info field */);
1863 }
1864
1865 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata);
1866 if (WARN_ON(!link))
1867 return -EINVAL;
1868
1869 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss))
1870 return -EINVAL;
1871
1872 skb = alloc_skb(size, GFP_KERNEL);
1873 if (!skb)
1874 return -ENOMEM;
1875
1876 skb_reserve(skb, local->hw.extra_tx_headroom);
1877
1878 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
1879 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
1880
1881 /* Set MBSSID support for HE AP if needed */
1882 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) &&
1883 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE &&
1884 ext_capa && ext_capa->datalen >= 3)
1885 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1886
1887 mgmt = skb_put_zero(skb, 24);
1888 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
1889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1890 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
1891
1892 listen_int = cpu_to_le16(assoc_data->s1g ?
1893 ieee80211_encode_usf(local->hw.conf.listen_interval) :
1894 local->hw.conf.listen_interval);
1895 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) {
1896 skb_put(skb, 10);
1897 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1898 IEEE80211_STYPE_REASSOC_REQ);
1899 capab_pos = &mgmt->u.reassoc_req.capab_info;
1900 mgmt->u.reassoc_req.listen_interval = listen_int;
1901 memcpy(mgmt->u.reassoc_req.current_ap,
1902 assoc_data->prev_ap_addr, ETH_ALEN);
1903 info.subtype = IEEE80211_STYPE_REASSOC_REQ;
1904 } else {
1905 skb_put(skb, 4);
1906 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1907 IEEE80211_STYPE_ASSOC_REQ);
1908 capab_pos = &mgmt->u.assoc_req.capab_info;
1909 mgmt->u.assoc_req.listen_interval = listen_int;
1910 info.subtype = IEEE80211_STYPE_ASSOC_REQ;
1911 }
1912
1913 /* SSID */
1914 pos = skb_put(skb, 2 + assoc_data->ssid_len);
1915 ie_start = pos;
1916 *pos++ = WLAN_EID_SSID;
1917 *pos++ = assoc_data->ssid_len;
1918 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
1919
1920 /*
1921 * This bit is technically reserved, so it shouldn't matter for either
1922 * the AP or us, but it also means we shouldn't set it. However, we've
1923 * always set it in the past, and apparently some EHT APs check that
1924 * we don't set it. To avoid interoperability issues with old APs that
1925 * for some reason check it and want it to be set, set the bit for all
1926 * pre-EHT connections as we used to do.
1927 */
1928 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT)
1929 capab |= WLAN_CAPABILITY_ESS;
1930
1931 /* add the elements for the assoc (main) link */
1932 link_capab = capab;
1933 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab,
1934 ext_capa,
1935 assoc_data->ie,
1936 assoc_data->ie_len,
1937 assoc_data->assoc_link_id, link,
1938 present_elems);
1939 put_unaligned_le16(link_capab, capab_pos);
1940
1941 /* if present, add any custom non-vendor IEs */
1942 if (assoc_data->ie_len) {
1943 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
1944 assoc_data->ie_len,
1945 offset);
1946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1947 offset = noffset;
1948 }
1949
1950 if (assoc_data->wmm) {
1951 if (assoc_data->uapsd) {
1952 qos_info = ifmgd->uapsd_queues;
1953 qos_info |= (ifmgd->uapsd_max_sp_len <<
1954 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
1955 } else {
1956 qos_info = 0;
1957 }
1958
1959 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
1960 }
1961
1962 /* add any remaining custom (i.e. vendor specific here) IEs */
1963 if (assoc_data->ie_len) {
1964 noffset = assoc_data->ie_len;
1965 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
1966 }
1967
1968 if (assoc_data->fils_kek_len) {
1969 ret = fils_encrypt_assoc_req(skb, assoc_data);
1970 if (ret < 0) {
1971 dev_kfree_skb(skb);
1972 return ret;
1973 }
1974 }
1975
1976 pos = skb_tail_pointer(skb);
1977 kfree(ifmgd->assoc_req_ies);
1978 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC);
1979 if (!ifmgd->assoc_req_ies) {
1980 dev_kfree_skb(skb);
1981 return -ENOMEM;
1982 }
1983
1984 ifmgd->assoc_req_ies_len = pos - ie_start;
1985
1986 info.link_id = assoc_data->assoc_link_id;
1987 drv_mgd_prepare_tx(local, sdata, &info);
1988
1989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1990 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1992 IEEE80211_TX_INTFL_MLME_CONN_TX;
1993 ieee80211_tx_skb(sdata, skb);
1994
1995 return 0;
1996 }
1997
ieee80211_send_pspoll(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1998 void ieee80211_send_pspoll(struct ieee80211_local *local,
1999 struct ieee80211_sub_if_data *sdata)
2000 {
2001 struct ieee80211_pspoll *pspoll;
2002 struct sk_buff *skb;
2003
2004 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
2005 if (!skb)
2006 return;
2007
2008 pspoll = (struct ieee80211_pspoll *) skb->data;
2009 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
2010
2011 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2012 ieee80211_tx_skb(sdata, skb);
2013 }
2014
ieee80211_send_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool powersave)2015 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2016 struct ieee80211_sub_if_data *sdata,
2017 bool powersave)
2018 {
2019 struct sk_buff *skb;
2020 struct ieee80211_hdr_3addr *nullfunc;
2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2022
2023 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1,
2024 !ieee80211_hw_check(&local->hw,
2025 DOESNT_SUPPORT_QOS_NDP));
2026 if (!skb)
2027 return;
2028
2029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
2030 if (powersave)
2031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
2032
2033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
2035
2036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2038
2039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
2040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
2041
2042 ieee80211_tx_skb(sdata, skb);
2043 }
2044
ieee80211_send_4addr_nullfunc(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)2045 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
2046 struct ieee80211_sub_if_data *sdata)
2047 {
2048 struct sk_buff *skb;
2049 struct ieee80211_hdr *nullfunc;
2050 __le16 fc;
2051
2052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2053 return;
2054
2055 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
2056 if (!skb)
2057 return;
2058
2059 skb_reserve(skb, local->hw.extra_tx_headroom);
2060
2061 nullfunc = skb_put_zero(skb, 30);
2062 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2063 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2064 nullfunc->frame_control = fc;
2065 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
2066 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
2067 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN);
2068 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
2069
2070 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
2072 ieee80211_tx_skb(sdata, skb);
2073 }
2074
2075 /* spectrum management related things */
ieee80211_csa_switch_work(struct wiphy * wiphy,struct wiphy_work * work)2076 static void ieee80211_csa_switch_work(struct wiphy *wiphy,
2077 struct wiphy_work *work)
2078 {
2079 struct ieee80211_link_data *link =
2080 container_of(work, struct ieee80211_link_data,
2081 u.mgd.csa.switch_work.work);
2082 struct ieee80211_sub_if_data *sdata = link->sdata;
2083 struct ieee80211_local *local = sdata->local;
2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2085 int ret;
2086
2087 if (!ieee80211_sdata_running(sdata))
2088 return;
2089
2090 lockdep_assert_wiphy(local->hw.wiphy);
2091
2092 if (!ifmgd->associated)
2093 return;
2094
2095 if (!link->conf->csa_active)
2096 return;
2097
2098 /*
2099 * If the link isn't active (now), we cannot wait for beacons, won't
2100 * have a reserved chanctx, etc. Just switch over the chandef and
2101 * update cfg80211 directly.
2102 */
2103 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) {
2104 link->conf->chanreq = link->csa.chanreq;
2105 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper,
2106 link->link_id);
2107 return;
2108 }
2109
2110 /*
2111 * using reservation isn't immediate as it may be deferred until later
2112 * with multi-vif. once reservation is complete it will re-schedule the
2113 * work with no reserved_chanctx so verify chandef to check if it
2114 * completed successfully
2115 */
2116
2117 if (link->reserved_chanctx) {
2118 /*
2119 * with multi-vif csa driver may call ieee80211_csa_finish()
2120 * many times while waiting for other interfaces to use their
2121 * reservations
2122 */
2123 if (link->reserved_ready)
2124 return;
2125
2126 ret = ieee80211_link_use_reserved_context(link);
2127 if (ret) {
2128 link_info(link,
2129 "failed to use reserved channel context, disconnecting (err=%d)\n",
2130 ret);
2131 wiphy_work_queue(sdata->local->hw.wiphy,
2132 &ifmgd->csa_connection_drop_work);
2133 }
2134 return;
2135 }
2136
2137 if (!ieee80211_chanreq_identical(&link->conf->chanreq,
2138 &link->csa.chanreq)) {
2139 link_info(link,
2140 "failed to finalize channel switch, disconnecting\n");
2141 wiphy_work_queue(sdata->local->hw.wiphy,
2142 &ifmgd->csa_connection_drop_work);
2143 return;
2144 }
2145
2146 link->u.mgd.csa.waiting_bcn = true;
2147
2148 /* apply new TPE restrictions immediately on the new channel */
2149 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ &&
2150 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) {
2151 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe,
2152 &link->u.mgd.csa.ap_chandef,
2153 &link->conf->chanreq.oper);
2154 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe,
2155 sizeof(link->u.mgd.csa.tpe))) {
2156 link->conf->tpe = link->u.mgd.csa.tpe;
2157 ieee80211_link_info_change_notify(sdata, link,
2158 BSS_CHANGED_TPE);
2159 }
2160 }
2161
2162 ieee80211_sta_reset_beacon_monitor(sdata);
2163 ieee80211_sta_reset_conn_monitor(sdata);
2164 }
2165
ieee80211_chswitch_post_beacon(struct ieee80211_link_data * link)2166 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link)
2167 {
2168 struct ieee80211_sub_if_data *sdata = link->sdata;
2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2170 int ret;
2171
2172 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2173
2174 WARN_ON(!link->conf->csa_active);
2175
2176 ieee80211_vif_unblock_queues_csa(sdata);
2177
2178 link->conf->csa_active = false;
2179 link->u.mgd.csa.blocked_tx = false;
2180 link->u.mgd.csa.waiting_bcn = false;
2181
2182 ret = drv_post_channel_switch(link);
2183 if (ret) {
2184 link_info(link,
2185 "driver post channel switch failed, disconnecting\n");
2186 wiphy_work_queue(sdata->local->hw.wiphy,
2187 &ifmgd->csa_connection_drop_work);
2188 return;
2189 }
2190
2191 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper,
2192 link->link_id);
2193 }
2194
ieee80211_chswitch_done(struct ieee80211_vif * vif,bool success,unsigned int link_id)2195 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success,
2196 unsigned int link_id)
2197 {
2198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2199
2200 trace_api_chswitch_done(sdata, success, link_id);
2201
2202 rcu_read_lock();
2203
2204 if (!success) {
2205 sdata_info(sdata,
2206 "driver channel switch failed (link %d), disconnecting\n",
2207 link_id);
2208 wiphy_work_queue(sdata->local->hw.wiphy,
2209 &sdata->u.mgd.csa_connection_drop_work);
2210 } else {
2211 struct ieee80211_link_data *link =
2212 rcu_dereference(sdata->link[link_id]);
2213
2214 if (WARN_ON(!link)) {
2215 rcu_read_unlock();
2216 return;
2217 }
2218
2219 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
2220 &link->u.mgd.csa.switch_work, 0);
2221 }
2222
2223 rcu_read_unlock();
2224 }
2225 EXPORT_SYMBOL(ieee80211_chswitch_done);
2226
2227 static void
ieee80211_sta_abort_chanswitch(struct ieee80211_link_data * link)2228 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
2229 {
2230 struct ieee80211_sub_if_data *sdata = link->sdata;
2231 struct ieee80211_local *local = sdata->local;
2232
2233 lockdep_assert_wiphy(local->hw.wiphy);
2234
2235 if (!local->ops->abort_channel_switch)
2236 return;
2237
2238 ieee80211_link_unreserve_chanctx(link);
2239
2240 ieee80211_vif_unblock_queues_csa(sdata);
2241
2242 link->conf->csa_active = false;
2243 link->u.mgd.csa.blocked_tx = false;
2244
2245 drv_abort_channel_switch(link);
2246 }
2247
2248 struct sta_csa_rnr_iter_data {
2249 struct ieee80211_link_data *link;
2250 struct ieee80211_channel *chan;
2251 u8 mld_id;
2252 };
2253
2254 static enum cfg80211_rnr_iter_ret
ieee80211_sta_csa_rnr_iter(void * _data,u8 type,const struct ieee80211_neighbor_ap_info * info,const u8 * tbtt_info,u8 tbtt_info_len)2255 ieee80211_sta_csa_rnr_iter(void *_data, u8 type,
2256 const struct ieee80211_neighbor_ap_info *info,
2257 const u8 *tbtt_info, u8 tbtt_info_len)
2258 {
2259 struct sta_csa_rnr_iter_data *data = _data;
2260 struct ieee80211_link_data *link = data->link;
2261 struct ieee80211_sub_if_data *sdata = link->sdata;
2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2263 const struct ieee80211_tbtt_info_ge_11 *ti;
2264 enum nl80211_band band;
2265 unsigned int center_freq;
2266 int link_id;
2267
2268 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT)
2269 return RNR_ITER_CONTINUE;
2270
2271 if (tbtt_info_len < sizeof(*ti))
2272 return RNR_ITER_CONTINUE;
2273
2274 ti = (const void *)tbtt_info;
2275
2276 if (ti->mld_params.mld_id != data->mld_id)
2277 return RNR_ITER_CONTINUE;
2278
2279 link_id = le16_get_bits(ti->mld_params.params,
2280 IEEE80211_RNR_MLD_PARAMS_LINK_ID);
2281 if (link_id != data->link->link_id)
2282 return RNR_ITER_CONTINUE;
2283
2284 /* we found the entry for our link! */
2285
2286 /* this AP is confused, it had this right before ... just disconnect */
2287 if (!ieee80211_operating_class_to_band(info->op_class, &band)) {
2288 link_info(link,
2289 "AP now has invalid operating class in RNR, disconnect\n");
2290 wiphy_work_queue(sdata->local->hw.wiphy,
2291 &ifmgd->csa_connection_drop_work);
2292 return RNR_ITER_BREAK;
2293 }
2294
2295 center_freq = ieee80211_channel_to_frequency(info->channel, band);
2296 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq);
2297
2298 return RNR_ITER_BREAK;
2299 }
2300
2301 static void
ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data * link,struct ieee802_11_elems * elems)2302 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link,
2303 struct ieee802_11_elems *elems)
2304 {
2305 struct ieee80211_sub_if_data *sdata = link->sdata;
2306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2307 struct sta_csa_rnr_iter_data data = {
2308 .link = link,
2309 };
2310
2311 /*
2312 * If we get here, we see a beacon from another link without
2313 * CSA still being reported for it, so now we have to check
2314 * if the CSA was aborted or completed. This may not even be
2315 * perfectly possible if the CSA was only done for changing
2316 * the puncturing, but in that case if the link in inactive
2317 * we don't really care, and if it's an active link (or when
2318 * it's activated later) we'll get a beacon and adjust.
2319 */
2320
2321 if (WARN_ON(!elems->ml_basic))
2322 return;
2323
2324 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic);
2325
2326 /*
2327 * So in order to do this, iterate the RNR element(s) and see
2328 * what channel is reported now.
2329 */
2330 cfg80211_iter_rnr(elems->ie_start, elems->total_len,
2331 ieee80211_sta_csa_rnr_iter, &data);
2332
2333 if (!data.chan) {
2334 link_info(link,
2335 "couldn't find (valid) channel in RNR for CSA, disconnect\n");
2336 wiphy_work_queue(sdata->local->hw.wiphy,
2337 &ifmgd->csa_connection_drop_work);
2338 return;
2339 }
2340
2341 /*
2342 * If it doesn't match the CSA, then assume it aborted. This
2343 * may erroneously detect that it was _not_ aborted when it
2344 * was in fact aborted, but only changed the bandwidth or the
2345 * puncturing configuration, but we don't have enough data to
2346 * detect that.
2347 */
2348 if (data.chan != link->csa.chanreq.oper.chan)
2349 ieee80211_sta_abort_chanswitch(link);
2350 }
2351
2352 enum ieee80211_csa_source {
2353 IEEE80211_CSA_SOURCE_BEACON,
2354 IEEE80211_CSA_SOURCE_OTHER_LINK,
2355 IEEE80211_CSA_SOURCE_PROT_ACTION,
2356 IEEE80211_CSA_SOURCE_UNPROT_ACTION,
2357 };
2358
2359 static void
ieee80211_sta_process_chanswitch(struct ieee80211_link_data * link,u64 timestamp,u32 device_timestamp,struct ieee802_11_elems * full_elems,struct ieee802_11_elems * csa_elems,enum ieee80211_csa_source source)2360 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
2361 u64 timestamp, u32 device_timestamp,
2362 struct ieee802_11_elems *full_elems,
2363 struct ieee802_11_elems *csa_elems,
2364 enum ieee80211_csa_source source)
2365 {
2366 struct ieee80211_sub_if_data *sdata = link->sdata;
2367 struct ieee80211_local *local = sdata->local;
2368 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2369 struct ieee80211_chanctx *chanctx = NULL;
2370 struct ieee80211_chanctx_conf *conf;
2371 struct ieee80211_csa_ie csa_ie = {};
2372 struct ieee80211_channel_switch ch_switch = {
2373 .link_id = link->link_id,
2374 .timestamp = timestamp,
2375 .device_timestamp = device_timestamp,
2376 };
2377 unsigned long now;
2378 int res;
2379
2380 lockdep_assert_wiphy(local->hw.wiphy);
2381
2382 if (csa_elems) {
2383 struct cfg80211_bss *cbss = link->conf->bss;
2384 enum nl80211_band current_band;
2385 struct ieee80211_bss *bss;
2386
2387 if (WARN_ON(!cbss))
2388 return;
2389
2390 current_band = cbss->channel->band;
2391 bss = (void *)cbss->priv;
2392
2393 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems,
2394 current_band,
2395 bss->vht_cap_info,
2396 &link->u.mgd.conn,
2397 link->u.mgd.bssid,
2398 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION,
2399 &csa_ie);
2400 if (res == 0) {
2401 ch_switch.block_tx = csa_ie.mode;
2402 ch_switch.chandef = csa_ie.chanreq.oper;
2403 ch_switch.count = csa_ie.count;
2404 ch_switch.delay = csa_ie.max_switch_time;
2405 }
2406
2407 link->u.mgd.csa.tpe = csa_elems->csa_tpe;
2408 } else {
2409 /*
2410 * If there was no per-STA profile for this link, we
2411 * get called with csa_elems == NULL. This of course means
2412 * there are no CSA elements, so set res=1 indicating
2413 * no more CSA.
2414 */
2415 res = 1;
2416 }
2417
2418 if (res < 0) {
2419 /* ignore this case, not a protected frame */
2420 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION)
2421 return;
2422 goto drop_connection;
2423 }
2424
2425 if (link->conf->csa_active) {
2426 switch (source) {
2427 case IEEE80211_CSA_SOURCE_PROT_ACTION:
2428 case IEEE80211_CSA_SOURCE_UNPROT_ACTION:
2429 /* already processing - disregard action frames */
2430 return;
2431 case IEEE80211_CSA_SOURCE_BEACON:
2432 if (link->u.mgd.csa.waiting_bcn) {
2433 ieee80211_chswitch_post_beacon(link);
2434 /*
2435 * If the CSA is still present after the switch
2436 * we need to consider it as a new CSA (possibly
2437 * to self). This happens by not returning here
2438 * so we'll get to the check below.
2439 */
2440 } else if (res) {
2441 ieee80211_sta_abort_chanswitch(link);
2442 return;
2443 } else {
2444 drv_channel_switch_rx_beacon(sdata, &ch_switch);
2445 return;
2446 }
2447 break;
2448 case IEEE80211_CSA_SOURCE_OTHER_LINK:
2449 /* active link: we want to see the beacon to continue */
2450 if (ieee80211_vif_link_active(&sdata->vif,
2451 link->link_id))
2452 return;
2453
2454 /* switch work ran, so just complete the process */
2455 if (link->u.mgd.csa.waiting_bcn) {
2456 ieee80211_chswitch_post_beacon(link);
2457 /*
2458 * If the CSA is still present after the switch
2459 * we need to consider it as a new CSA (possibly
2460 * to self). This happens by not returning here
2461 * so we'll get to the check below.
2462 */
2463 break;
2464 }
2465
2466 /* link still has CSA but we already know, do nothing */
2467 if (!res)
2468 return;
2469
2470 /* check in the RNR if the CSA aborted */
2471 ieee80211_sta_other_link_csa_disappeared(link,
2472 full_elems);
2473 return;
2474 }
2475 }
2476
2477 /* no active CSA nor a new one */
2478 if (res) {
2479 /*
2480 * However, we may have stopped queues when receiving a public
2481 * action frame that couldn't be protected, if it had the quiet
2482 * bit set. This is a trade-off, we want to be quiet as soon as
2483 * possible, but also don't trust the public action frame much,
2484 * as it can't be protected.
2485 */
2486 if (unlikely(link->u.mgd.csa.blocked_tx)) {
2487 link->u.mgd.csa.blocked_tx = false;
2488 ieee80211_vif_unblock_queues_csa(sdata);
2489 }
2490 return;
2491 }
2492
2493 /*
2494 * We don't really trust public action frames, but block queues (go to
2495 * quiet mode) for them anyway, we should get a beacon soon to either
2496 * know what the CSA really is, or figure out the public action frame
2497 * was actually an attack.
2498 */
2499 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) {
2500 if (csa_ie.mode) {
2501 link->u.mgd.csa.blocked_tx = true;
2502 ieee80211_vif_block_queues_csa(sdata);
2503 }
2504 return;
2505 }
2506
2507 if (link->conf->chanreq.oper.chan->band !=
2508 csa_ie.chanreq.oper.chan->band) {
2509 link_info(link,
2510 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
2511 link->u.mgd.bssid,
2512 csa_ie.chanreq.oper.chan->center_freq,
2513 csa_ie.chanreq.oper.width,
2514 csa_ie.chanreq.oper.center_freq1,
2515 csa_ie.chanreq.oper.center_freq2);
2516 goto drop_connection;
2517 }
2518
2519 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper,
2520 IEEE80211_CHAN_DISABLED)) {
2521 link_info(link,
2522 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n",
2523 link->u.mgd.bssid,
2524 csa_ie.chanreq.oper.chan->center_freq,
2525 csa_ie.chanreq.oper.chan->freq_offset,
2526 csa_ie.chanreq.oper.width,
2527 csa_ie.chanreq.oper.center_freq1,
2528 csa_ie.chanreq.oper.freq1_offset,
2529 csa_ie.chanreq.oper.center_freq2);
2530 goto drop_connection;
2531 }
2532
2533 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper,
2534 &link->conf->chanreq.oper) &&
2535 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) {
2536 if (link->u.mgd.csa.ignored_same_chan)
2537 return;
2538 link_info(link,
2539 "AP %pM tries to chanswitch to same channel, ignore\n",
2540 link->u.mgd.bssid);
2541 link->u.mgd.csa.ignored_same_chan = true;
2542 return;
2543 }
2544
2545 /*
2546 * Drop all TDLS peers on the affected link - either we disconnect or
2547 * move to a different channel from this point on. There's no telling
2548 * what our peer will do.
2549 * The TDLS WIDER_BW scenario is also problematic, as peers might now
2550 * have an incompatible wider chandef.
2551 */
2552 ieee80211_teardown_tdls_peers(link);
2553
2554 conf = rcu_dereference_protected(link->conf->chanctx_conf,
2555 lockdep_is_held(&local->hw.wiphy->mtx));
2556 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) {
2557 link_info(link,
2558 "no channel context assigned to vif?, disconnecting\n");
2559 goto drop_connection;
2560 }
2561
2562 if (conf)
2563 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
2564
2565 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
2566 link_info(link,
2567 "driver doesn't support chan-switch with channel contexts\n");
2568 goto drop_connection;
2569 }
2570
2571 if (drv_pre_channel_switch(sdata, &ch_switch)) {
2572 link_info(link,
2573 "preparing for channel switch failed, disconnecting\n");
2574 goto drop_connection;
2575 }
2576
2577 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap;
2578
2579 link->csa.chanreq.oper = csa_ie.chanreq.oper;
2580 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn,
2581 &csa_ie.chanreq.ap);
2582
2583 if (chanctx) {
2584 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq,
2585 chanctx->mode, false);
2586 if (res) {
2587 link_info(link,
2588 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
2589 res);
2590 goto drop_connection;
2591 }
2592 }
2593
2594 link->conf->csa_active = true;
2595 link->u.mgd.csa.ignored_same_chan = false;
2596 link->u.mgd.beacon_crc_valid = false;
2597 link->u.mgd.csa.blocked_tx = csa_ie.mode;
2598
2599 if (csa_ie.mode)
2600 ieee80211_vif_block_queues_csa(sdata);
2601
2602 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper,
2603 link->link_id, csa_ie.count,
2604 csa_ie.mode);
2605
2606 /* we may have to handle timeout for deactivated link in software */
2607 now = jiffies;
2608 link->u.mgd.csa.time = now +
2609 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) *
2610 link->conf->beacon_int);
2611
2612 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) &&
2613 local->ops->channel_switch) {
2614 /*
2615 * Use driver's channel switch callback, the driver will
2616 * later call ieee80211_chswitch_done(). It may deactivate
2617 * the link as well, we handle that elsewhere and queue
2618 * the csa.switch_work for the calculated time then.
2619 */
2620 drv_channel_switch(local, sdata, &ch_switch);
2621 return;
2622 }
2623
2624 /* channel switch handled in software */
2625 wiphy_delayed_work_queue(local->hw.wiphy,
2626 &link->u.mgd.csa.switch_work,
2627 link->u.mgd.csa.time - now);
2628 return;
2629 drop_connection:
2630 /*
2631 * This is just so that the disconnect flow will know that
2632 * we were trying to switch channel and failed. In case the
2633 * mode is 1 (we are not allowed to Tx), we will know not to
2634 * send a deauthentication frame. Those two fields will be
2635 * reset when the disconnection worker runs.
2636 */
2637 link->conf->csa_active = true;
2638 link->u.mgd.csa.blocked_tx = csa_ie.mode;
2639 sdata->csa_blocked_queues =
2640 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA);
2641
2642 wiphy_work_queue(sdata->local->hw.wiphy,
2643 &ifmgd->csa_connection_drop_work);
2644 }
2645
2646 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)2647 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
2648 struct ieee80211_channel *channel,
2649 const u8 *country_ie, u8 country_ie_len,
2650 const u8 *pwr_constr_elem,
2651 int *chan_pwr, int *pwr_reduction)
2652 {
2653 struct ieee80211_country_ie_triplet *triplet;
2654 int chan = ieee80211_frequency_to_channel(channel->center_freq);
2655 int i, chan_increment;
2656 bool have_chan_pwr = false;
2657
2658 /* Invalid IE */
2659 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2660 return false;
2661
2662 triplet = (void *)(country_ie + 3);
2663 country_ie_len -= 3;
2664
2665 switch (channel->band) {
2666 default:
2667 WARN_ON_ONCE(1);
2668 fallthrough;
2669 case NL80211_BAND_2GHZ:
2670 case NL80211_BAND_60GHZ:
2671 case NL80211_BAND_LC:
2672 chan_increment = 1;
2673 break;
2674 case NL80211_BAND_5GHZ:
2675 chan_increment = 4;
2676 break;
2677 case NL80211_BAND_6GHZ:
2678 /*
2679 * In the 6 GHz band, the "maximum transmit power level"
2680 * field in the triplets is reserved, and thus will be
2681 * zero and we shouldn't use it to control TX power.
2682 * The actual TX power will be given in the transmit
2683 * power envelope element instead.
2684 */
2685 return false;
2686 }
2687
2688 /* find channel */
2689 while (country_ie_len >= 3) {
2690 u8 first_channel = triplet->chans.first_channel;
2691
2692 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
2693 goto next;
2694
2695 for (i = 0; i < triplet->chans.num_channels; i++) {
2696 if (first_channel + i * chan_increment == chan) {
2697 have_chan_pwr = true;
2698 *chan_pwr = triplet->chans.max_power;
2699 break;
2700 }
2701 }
2702 if (have_chan_pwr)
2703 break;
2704
2705 next:
2706 triplet++;
2707 country_ie_len -= 3;
2708 }
2709
2710 if (have_chan_pwr && pwr_constr_elem)
2711 *pwr_reduction = *pwr_constr_elem;
2712 else
2713 *pwr_reduction = 0;
2714
2715 return have_chan_pwr;
2716 }
2717
ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data * sdata,struct ieee80211_channel * channel,const u8 * cisco_dtpc_ie,int * pwr_level)2718 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
2719 struct ieee80211_channel *channel,
2720 const u8 *cisco_dtpc_ie,
2721 int *pwr_level)
2722 {
2723 /* From practical testing, the first data byte of the DTPC element
2724 * seems to contain the requested dBm level, and the CLI on Cisco
2725 * APs clearly state the range is -127 to 127 dBm, which indicates
2726 * a signed byte, although it seemingly never actually goes negative.
2727 * The other byte seems to always be zero.
2728 */
2729 *pwr_level = (__s8)cisco_dtpc_ie[4];
2730 }
2731
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)2732 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,
2733 struct ieee80211_channel *channel,
2734 struct ieee80211_mgmt *mgmt,
2735 const u8 *country_ie, u8 country_ie_len,
2736 const u8 *pwr_constr_ie,
2737 const u8 *cisco_dtpc_ie)
2738 {
2739 struct ieee80211_sub_if_data *sdata = link->sdata;
2740 bool has_80211h_pwr = false, has_cisco_pwr = false;
2741 int chan_pwr = 0, pwr_reduction_80211h = 0;
2742 int pwr_level_cisco, pwr_level_80211h;
2743 int new_ap_level;
2744 __le16 capab = mgmt->u.probe_resp.capab_info;
2745
2746 if (ieee80211_is_s1g_beacon(mgmt->frame_control))
2747 return 0; /* TODO */
2748
2749 if (country_ie &&
2750 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
2751 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
2752 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
2753 sdata, channel, country_ie, country_ie_len,
2754 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
2755 pwr_level_80211h =
2756 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
2757 }
2758
2759 if (cisco_dtpc_ie) {
2760 ieee80211_find_cisco_dtpc(
2761 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
2762 has_cisco_pwr = true;
2763 }
2764
2765 if (!has_80211h_pwr && !has_cisco_pwr)
2766 return 0;
2767
2768 /* If we have both 802.11h and Cisco DTPC, apply both limits
2769 * by picking the smallest of the two power levels advertised.
2770 */
2771 if (has_80211h_pwr &&
2772 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
2773 new_ap_level = pwr_level_80211h;
2774
2775 if (link->ap_power_level == new_ap_level)
2776 return 0;
2777
2778 sdata_dbg(sdata,
2779 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
2780 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
2781 link->u.mgd.bssid);
2782 } else { /* has_cisco_pwr is always true here. */
2783 new_ap_level = pwr_level_cisco;
2784
2785 if (link->ap_power_level == new_ap_level)
2786 return 0;
2787
2788 sdata_dbg(sdata,
2789 "Limiting TX power to %d dBm as advertised by %pM\n",
2790 pwr_level_cisco, link->u.mgd.bssid);
2791 }
2792
2793 link->ap_power_level = new_ap_level;
2794 if (__ieee80211_recalc_txpower(sdata))
2795 return BSS_CHANGED_TXPOWER;
2796 return 0;
2797 }
2798
2799 /* powersave */
ieee80211_enable_ps(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)2800 static void ieee80211_enable_ps(struct ieee80211_local *local,
2801 struct ieee80211_sub_if_data *sdata)
2802 {
2803 struct ieee80211_conf *conf = &local->hw.conf;
2804
2805 /*
2806 * If we are scanning right now then the parameters will
2807 * take effect when scan finishes.
2808 */
2809 if (local->scanning)
2810 return;
2811
2812 if (conf->dynamic_ps_timeout > 0 &&
2813 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2814 mod_timer(&local->dynamic_ps_timer, jiffies +
2815 msecs_to_jiffies(conf->dynamic_ps_timeout));
2816 } else {
2817 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
2818 ieee80211_send_nullfunc(local, sdata, true);
2819
2820 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
2821 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2822 return;
2823
2824 conf->flags |= IEEE80211_CONF_PS;
2825 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2826 }
2827 }
2828
ieee80211_change_ps(struct ieee80211_local * local)2829 static void ieee80211_change_ps(struct ieee80211_local *local)
2830 {
2831 struct ieee80211_conf *conf = &local->hw.conf;
2832
2833 if (local->ps_sdata) {
2834 ieee80211_enable_ps(local, local->ps_sdata);
2835 } else if (conf->flags & IEEE80211_CONF_PS) {
2836 conf->flags &= ~IEEE80211_CONF_PS;
2837 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2838 del_timer_sync(&local->dynamic_ps_timer);
2839 wiphy_work_cancel(local->hw.wiphy,
2840 &local->dynamic_ps_enable_work);
2841 }
2842 }
2843
ieee80211_powersave_allowed(struct ieee80211_sub_if_data * sdata)2844 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
2845 {
2846 struct ieee80211_local *local = sdata->local;
2847 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
2848 struct sta_info *sta = NULL;
2849 bool authorized = false;
2850
2851 if (!mgd->powersave)
2852 return false;
2853
2854 if (mgd->broken_ap)
2855 return false;
2856
2857 if (!mgd->associated)
2858 return false;
2859
2860 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
2861 return false;
2862
2863 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) &&
2864 !sdata->deflink.u.mgd.have_beacon)
2865 return false;
2866
2867 rcu_read_lock();
2868 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
2869 if (sta)
2870 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2871 rcu_read_unlock();
2872
2873 return authorized;
2874 }
2875
2876 /* need to hold RTNL or interface lock */
ieee80211_recalc_ps(struct ieee80211_local * local)2877 void ieee80211_recalc_ps(struct ieee80211_local *local)
2878 {
2879 struct ieee80211_sub_if_data *sdata, *found = NULL;
2880 int count = 0;
2881 int timeout;
2882
2883 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) ||
2884 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
2885 local->ps_sdata = NULL;
2886 return;
2887 }
2888
2889 list_for_each_entry(sdata, &local->interfaces, list) {
2890 if (!ieee80211_sdata_running(sdata))
2891 continue;
2892 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2893 /* If an AP vif is found, then disable PS
2894 * by setting the count to zero thereby setting
2895 * ps_sdata to NULL.
2896 */
2897 count = 0;
2898 break;
2899 }
2900 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2901 continue;
2902 found = sdata;
2903 count++;
2904 }
2905
2906 if (count == 1 && ieee80211_powersave_allowed(found)) {
2907 u8 dtimper = found->deflink.u.mgd.dtim_period;
2908
2909 timeout = local->dynamic_ps_forced_timeout;
2910 if (timeout < 0)
2911 timeout = 100;
2912 local->hw.conf.dynamic_ps_timeout = timeout;
2913
2914 /* If the TIM IE is invalid, pretend the value is 1 */
2915 if (!dtimper)
2916 dtimper = 1;
2917
2918 local->hw.conf.ps_dtim_period = dtimper;
2919 local->ps_sdata = found;
2920 } else {
2921 local->ps_sdata = NULL;
2922 }
2923
2924 ieee80211_change_ps(local);
2925 }
2926
ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data * sdata)2927 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
2928 {
2929 bool ps_allowed = ieee80211_powersave_allowed(sdata);
2930
2931 if (sdata->vif.cfg.ps != ps_allowed) {
2932 sdata->vif.cfg.ps = ps_allowed;
2933 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS);
2934 }
2935 }
2936
ieee80211_dynamic_ps_disable_work(struct wiphy * wiphy,struct wiphy_work * work)2937 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy,
2938 struct wiphy_work *work)
2939 {
2940 struct ieee80211_local *local =
2941 container_of(work, struct ieee80211_local,
2942 dynamic_ps_disable_work);
2943
2944 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2945 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2946 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2947 }
2948
2949 ieee80211_wake_queues_by_reason(&local->hw,
2950 IEEE80211_MAX_QUEUE_MAP,
2951 IEEE80211_QUEUE_STOP_REASON_PS,
2952 false);
2953 }
2954
ieee80211_dynamic_ps_enable_work(struct wiphy * wiphy,struct wiphy_work * work)2955 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy,
2956 struct wiphy_work *work)
2957 {
2958 struct ieee80211_local *local =
2959 container_of(work, struct ieee80211_local,
2960 dynamic_ps_enable_work);
2961 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
2962 struct ieee80211_if_managed *ifmgd;
2963 unsigned long flags;
2964 int q;
2965
2966 /* can only happen when PS was just disabled anyway */
2967 if (!sdata)
2968 return;
2969
2970 ifmgd = &sdata->u.mgd;
2971
2972 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2973 return;
2974
2975 if (local->hw.conf.dynamic_ps_timeout > 0) {
2976 /* don't enter PS if TX frames are pending */
2977 if (drv_tx_frames_pending(local)) {
2978 mod_timer(&local->dynamic_ps_timer, jiffies +
2979 msecs_to_jiffies(
2980 local->hw.conf.dynamic_ps_timeout));
2981 return;
2982 }
2983
2984 /*
2985 * transmission can be stopped by others which leads to
2986 * dynamic_ps_timer expiry. Postpone the ps timer if it
2987 * is not the actual idle state.
2988 */
2989 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2990 for (q = 0; q < local->hw.queues; q++) {
2991 if (local->queue_stop_reasons[q]) {
2992 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2993 flags);
2994 mod_timer(&local->dynamic_ps_timer, jiffies +
2995 msecs_to_jiffies(
2996 local->hw.conf.dynamic_ps_timeout));
2997 return;
2998 }
2999 }
3000 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3001 }
3002
3003 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3004 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
3005 if (drv_tx_frames_pending(local)) {
3006 mod_timer(&local->dynamic_ps_timer, jiffies +
3007 msecs_to_jiffies(
3008 local->hw.conf.dynamic_ps_timeout));
3009 } else {
3010 ieee80211_send_nullfunc(local, sdata, true);
3011 /* Flush to get the tx status of nullfunc frame */
3012 ieee80211_flush_queues(local, sdata, false);
3013 }
3014 }
3015
3016 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
3017 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
3018 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
3019 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
3020 local->hw.conf.flags |= IEEE80211_CONF_PS;
3021 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
3022 }
3023 }
3024
ieee80211_dynamic_ps_timer(struct timer_list * t)3025 void ieee80211_dynamic_ps_timer(struct timer_list *t)
3026 {
3027 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
3028
3029 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work);
3030 }
3031
ieee80211_dfs_cac_timer_work(struct wiphy * wiphy,struct wiphy_work * work)3032 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work)
3033 {
3034 struct ieee80211_sub_if_data *sdata =
3035 container_of(work, struct ieee80211_sub_if_data,
3036 dfs_cac_timer_work.work);
3037 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chanreq.oper;
3038
3039 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3040
3041 if (sdata->wdev.cac_started) {
3042 ieee80211_link_release_channel(&sdata->deflink);
3043 cfg80211_cac_event(sdata->dev, &chandef,
3044 NL80211_RADAR_CAC_FINISHED,
3045 GFP_KERNEL);
3046 }
3047 }
3048
3049 static bool
__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)3050 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
3051 {
3052 struct ieee80211_local *local = sdata->local;
3053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3054 bool ret = false;
3055 int ac;
3056
3057 if (local->hw.queues < IEEE80211_NUM_ACS)
3058 return false;
3059
3060 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3061 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3062 int non_acm_ac;
3063 unsigned long now = jiffies;
3064
3065 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
3066 tx_tspec->admitted_time &&
3067 time_after(now, tx_tspec->time_slice_start + HZ)) {
3068 tx_tspec->consumed_tx_time = 0;
3069 tx_tspec->time_slice_start = now;
3070
3071 if (tx_tspec->downgraded)
3072 tx_tspec->action =
3073 TX_TSPEC_ACTION_STOP_DOWNGRADE;
3074 }
3075
3076 switch (tx_tspec->action) {
3077 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
3078 /* take the original parameters */
3079 if (drv_conf_tx(local, &sdata->deflink, ac,
3080 &sdata->deflink.tx_conf[ac]))
3081 link_err(&sdata->deflink,
3082 "failed to set TX queue parameters for queue %d\n",
3083 ac);
3084 tx_tspec->action = TX_TSPEC_ACTION_NONE;
3085 tx_tspec->downgraded = false;
3086 ret = true;
3087 break;
3088 case TX_TSPEC_ACTION_DOWNGRADE:
3089 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3090 tx_tspec->action = TX_TSPEC_ACTION_NONE;
3091 ret = true;
3092 break;
3093 }
3094 /* downgrade next lower non-ACM AC */
3095 for (non_acm_ac = ac + 1;
3096 non_acm_ac < IEEE80211_NUM_ACS;
3097 non_acm_ac++)
3098 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
3099 break;
3100 /* Usually the loop will result in using BK even if it
3101 * requires admission control, but such a configuration
3102 * makes no sense and we have to transmit somehow - the
3103 * AC selection does the same thing.
3104 * If we started out trying to downgrade from BK, then
3105 * the extra condition here might be needed.
3106 */
3107 if (non_acm_ac >= IEEE80211_NUM_ACS)
3108 non_acm_ac = IEEE80211_AC_BK;
3109 if (drv_conf_tx(local, &sdata->deflink, ac,
3110 &sdata->deflink.tx_conf[non_acm_ac]))
3111 link_err(&sdata->deflink,
3112 "failed to set TX queue parameters for queue %d\n",
3113 ac);
3114 tx_tspec->action = TX_TSPEC_ACTION_NONE;
3115 ret = true;
3116 wiphy_delayed_work_queue(local->hw.wiphy,
3117 &ifmgd->tx_tspec_wk,
3118 tx_tspec->time_slice_start +
3119 HZ - now + 1);
3120 break;
3121 case TX_TSPEC_ACTION_NONE:
3122 /* nothing now */
3123 break;
3124 }
3125 }
3126
3127 return ret;
3128 }
3129
ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data * sdata)3130 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
3131 {
3132 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
3133 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
3134 BSS_CHANGED_QOS);
3135 }
3136
ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy * wiphy,struct wiphy_work * work)3137 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy,
3138 struct wiphy_work *work)
3139 {
3140 struct ieee80211_sub_if_data *sdata;
3141
3142 sdata = container_of(work, struct ieee80211_sub_if_data,
3143 u.mgd.tx_tspec_wk.work);
3144 ieee80211_sta_handle_tspec_ac_params(sdata);
3145 }
3146
ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data * link)3147 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link)
3148 {
3149 struct ieee80211_sub_if_data *sdata = link->sdata;
3150 struct ieee80211_local *local = sdata->local;
3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3152 struct ieee80211_tx_queue_params *params = link->tx_conf;
3153 u8 ac;
3154
3155 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3156 mlme_dbg(sdata,
3157 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
3158 ac, params[ac].acm,
3159 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
3160 params[ac].txop, params[ac].uapsd,
3161 ifmgd->tx_tspec[ac].downgraded);
3162 if (!ifmgd->tx_tspec[ac].downgraded &&
3163 drv_conf_tx(local, link, ac, ¶ms[ac]))
3164 link_err(link,
3165 "failed to set TX queue parameters for AC %d\n",
3166 ac);
3167 }
3168 }
3169
3170 /* MLME */
3171 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)3172 ieee80211_sta_wmm_params(struct ieee80211_local *local,
3173 struct ieee80211_link_data *link,
3174 const u8 *wmm_param, size_t wmm_param_len,
3175 const struct ieee80211_mu_edca_param_set *mu_edca)
3176 {
3177 struct ieee80211_sub_if_data *sdata = link->sdata;
3178 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
3179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3180 size_t left;
3181 int count, mu_edca_count, ac;
3182 const u8 *pos;
3183 u8 uapsd_queues = 0;
3184
3185 if (!local->ops->conf_tx)
3186 return false;
3187
3188 if (local->hw.queues < IEEE80211_NUM_ACS)
3189 return false;
3190
3191 if (!wmm_param)
3192 return false;
3193
3194 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
3195 return false;
3196
3197 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
3198 uapsd_queues = ifmgd->uapsd_queues;
3199
3200 count = wmm_param[6] & 0x0f;
3201 /* -1 is the initial value of ifmgd->mu_edca_last_param_set.
3202 * if mu_edca was preset before and now it disappeared tell
3203 * the driver about it.
3204 */
3205 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1;
3206 if (count == link->u.mgd.wmm_last_param_set &&
3207 mu_edca_count == link->u.mgd.mu_edca_last_param_set)
3208 return false;
3209 link->u.mgd.wmm_last_param_set = count;
3210 link->u.mgd.mu_edca_last_param_set = mu_edca_count;
3211
3212 pos = wmm_param + 8;
3213 left = wmm_param_len - 8;
3214
3215 memset(¶ms, 0, sizeof(params));
3216
3217 sdata->wmm_acm = 0;
3218 for (; left >= 4; left -= 4, pos += 4) {
3219 int aci = (pos[0] >> 5) & 0x03;
3220 int acm = (pos[0] >> 4) & 0x01;
3221 bool uapsd = false;
3222
3223 switch (aci) {
3224 case 1: /* AC_BK */
3225 ac = IEEE80211_AC_BK;
3226 if (acm)
3227 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
3228 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
3229 uapsd = true;
3230 params[ac].mu_edca = !!mu_edca;
3231 if (mu_edca)
3232 params[ac].mu_edca_param_rec = mu_edca->ac_bk;
3233 break;
3234 case 2: /* AC_VI */
3235 ac = IEEE80211_AC_VI;
3236 if (acm)
3237 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
3238 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
3239 uapsd = true;
3240 params[ac].mu_edca = !!mu_edca;
3241 if (mu_edca)
3242 params[ac].mu_edca_param_rec = mu_edca->ac_vi;
3243 break;
3244 case 3: /* AC_VO */
3245 ac = IEEE80211_AC_VO;
3246 if (acm)
3247 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
3248 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
3249 uapsd = true;
3250 params[ac].mu_edca = !!mu_edca;
3251 if (mu_edca)
3252 params[ac].mu_edca_param_rec = mu_edca->ac_vo;
3253 break;
3254 case 0: /* AC_BE */
3255 default:
3256 ac = IEEE80211_AC_BE;
3257 if (acm)
3258 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
3259 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
3260 uapsd = true;
3261 params[ac].mu_edca = !!mu_edca;
3262 if (mu_edca)
3263 params[ac].mu_edca_param_rec = mu_edca->ac_be;
3264 break;
3265 }
3266
3267 params[ac].aifs = pos[0] & 0x0f;
3268
3269 if (params[ac].aifs < 2) {
3270 link_info(link,
3271 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
3272 params[ac].aifs, aci);
3273 params[ac].aifs = 2;
3274 }
3275 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
3276 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
3277 params[ac].txop = get_unaligned_le16(pos + 2);
3278 params[ac].acm = acm;
3279 params[ac].uapsd = uapsd;
3280
3281 if (params[ac].cw_min == 0 ||
3282 params[ac].cw_min > params[ac].cw_max) {
3283 link_info(link,
3284 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
3285 params[ac].cw_min, params[ac].cw_max, aci);
3286 return false;
3287 }
3288 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac);
3289 }
3290
3291 /* WMM specification requires all 4 ACIs. */
3292 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3293 if (params[ac].cw_min == 0) {
3294 link_info(link,
3295 "AP has invalid WMM params (missing AC %d), using defaults\n",
3296 ac);
3297 return false;
3298 }
3299 }
3300
3301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3302 link->tx_conf[ac] = params[ac];
3303
3304 ieee80211_mgd_set_link_qos_params(link);
3305
3306 /* enable WMM or activate new settings */
3307 link->conf->qos = true;
3308 return true;
3309 }
3310
__ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)3311 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
3312 {
3313 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3314
3315 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
3316 ieee80211_run_deferred_scan(sdata->local);
3317 }
3318
ieee80211_stop_poll(struct ieee80211_sub_if_data * sdata)3319 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
3320 {
3321 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3322
3323 __ieee80211_stop_poll(sdata);
3324 }
3325
ieee80211_handle_bss_capability(struct ieee80211_link_data * link,u16 capab,bool erp_valid,u8 erp)3326 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link,
3327 u16 capab, bool erp_valid, u8 erp)
3328 {
3329 struct ieee80211_bss_conf *bss_conf = link->conf;
3330 struct ieee80211_supported_band *sband;
3331 u64 changed = 0;
3332 bool use_protection;
3333 bool use_short_preamble;
3334 bool use_short_slot;
3335
3336 sband = ieee80211_get_link_sband(link);
3337 if (!sband)
3338 return changed;
3339
3340 if (erp_valid) {
3341 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
3342 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
3343 } else {
3344 use_protection = false;
3345 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
3346 }
3347
3348 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
3349 if (sband->band == NL80211_BAND_5GHZ ||
3350 sband->band == NL80211_BAND_6GHZ)
3351 use_short_slot = true;
3352
3353 if (use_protection != bss_conf->use_cts_prot) {
3354 bss_conf->use_cts_prot = use_protection;
3355 changed |= BSS_CHANGED_ERP_CTS_PROT;
3356 }
3357
3358 if (use_short_preamble != bss_conf->use_short_preamble) {
3359 bss_conf->use_short_preamble = use_short_preamble;
3360 changed |= BSS_CHANGED_ERP_PREAMBLE;
3361 }
3362
3363 if (use_short_slot != bss_conf->use_short_slot) {
3364 bss_conf->use_short_slot = use_short_slot;
3365 changed |= BSS_CHANGED_ERP_SLOT;
3366 }
3367
3368 return changed;
3369 }
3370
ieee80211_link_set_associated(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)3371 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link,
3372 struct cfg80211_bss *cbss)
3373 {
3374 struct ieee80211_sub_if_data *sdata = link->sdata;
3375 struct ieee80211_bss_conf *bss_conf = link->conf;
3376 struct ieee80211_bss *bss = (void *)cbss->priv;
3377 u64 changed = BSS_CHANGED_QOS;
3378
3379 /* not really used in MLO */
3380 sdata->u.mgd.beacon_timeout =
3381 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count *
3382 bss_conf->beacon_int));
3383
3384 changed |= ieee80211_handle_bss_capability(link,
3385 bss_conf->assoc_capability,
3386 bss->has_erp_value,
3387 bss->erp_value);
3388
3389 ieee80211_check_rate_mask(link);
3390
3391 link->conf->bss = cbss;
3392 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
3393
3394 if (sdata->vif.p2p ||
3395 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
3396 const struct cfg80211_bss_ies *ies;
3397
3398 rcu_read_lock();
3399 ies = rcu_dereference(cbss->ies);
3400 if (ies) {
3401 int ret;
3402
3403 ret = cfg80211_get_p2p_attr(
3404 ies->data, ies->len,
3405 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3406 (u8 *) &bss_conf->p2p_noa_attr,
3407 sizeof(bss_conf->p2p_noa_attr));
3408 if (ret >= 2) {
3409 link->u.mgd.p2p_noa_index =
3410 bss_conf->p2p_noa_attr.index;
3411 changed |= BSS_CHANGED_P2P_PS;
3412 }
3413 }
3414 rcu_read_unlock();
3415 }
3416
3417 if (link->u.mgd.have_beacon) {
3418 bss_conf->beacon_rate = bss->beacon_rate;
3419 changed |= BSS_CHANGED_BEACON_INFO;
3420 } else {
3421 bss_conf->beacon_rate = NULL;
3422 }
3423
3424 /* Tell the driver to monitor connection quality (if supported) */
3425 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
3426 bss_conf->cqm_rssi_thold)
3427 changed |= BSS_CHANGED_CQM;
3428
3429 return changed;
3430 }
3431
ieee80211_set_associated(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])3432 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
3433 struct ieee80211_mgd_assoc_data *assoc_data,
3434 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
3435 {
3436 struct ieee80211_local *local = sdata->local;
3437 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
3438 u64 vif_changed = BSS_CHANGED_ASSOC;
3439 unsigned int link_id;
3440
3441 lockdep_assert_wiphy(local->hw.wiphy);
3442
3443 sdata->u.mgd.associated = true;
3444
3445 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
3446 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
3447 struct ieee80211_link_data *link;
3448
3449 if (!cbss ||
3450 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
3451 continue;
3452
3453 if (ieee80211_vif_is_mld(&sdata->vif) &&
3454 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id)))
3455 continue;
3456
3457 link = sdata_dereference(sdata->link[link_id], sdata);
3458 if (WARN_ON(!link))
3459 return;
3460
3461 changed[link_id] |= ieee80211_link_set_associated(link, cbss);
3462 }
3463
3464 /* just to be sure */
3465 ieee80211_stop_poll(sdata);
3466
3467 ieee80211_led_assoc(local, 1);
3468
3469 vif_cfg->assoc = 1;
3470
3471 /* Enable ARP filtering */
3472 if (vif_cfg->arp_addr_cnt)
3473 vif_changed |= BSS_CHANGED_ARP_FILTER;
3474
3475 if (ieee80211_vif_is_mld(&sdata->vif)) {
3476 for (link_id = 0;
3477 link_id < IEEE80211_MLD_MAX_NUM_LINKS;
3478 link_id++) {
3479 struct ieee80211_link_data *link;
3480 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
3481
3482 if (!cbss ||
3483 !(BIT(link_id) &
3484 ieee80211_vif_usable_links(&sdata->vif)) ||
3485 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
3486 continue;
3487
3488 link = sdata_dereference(sdata->link[link_id], sdata);
3489 if (WARN_ON(!link))
3490 return;
3491
3492 ieee80211_link_info_change_notify(sdata, link,
3493 changed[link_id]);
3494
3495 ieee80211_recalc_smps(sdata, link);
3496 }
3497
3498 ieee80211_vif_cfg_change_notify(sdata, vif_changed);
3499 } else {
3500 ieee80211_bss_info_change_notify(sdata,
3501 vif_changed | changed[0]);
3502 }
3503
3504 ieee80211_recalc_ps(local);
3505
3506 /* leave this here to not change ordering in non-MLO cases */
3507 if (!ieee80211_vif_is_mld(&sdata->vif))
3508 ieee80211_recalc_smps(sdata, &sdata->deflink);
3509 ieee80211_recalc_ps_vif(sdata);
3510
3511 netif_carrier_on(sdata->dev);
3512 }
3513
ieee80211_set_disassoc(struct ieee80211_sub_if_data * sdata,u16 stype,u16 reason,bool tx,u8 * frame_buf)3514 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
3515 u16 stype, u16 reason, bool tx,
3516 u8 *frame_buf)
3517 {
3518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3519 struct ieee80211_local *local = sdata->local;
3520 unsigned int link_id;
3521 u64 changed = 0;
3522 struct ieee80211_prep_tx_info info = {
3523 .subtype = stype,
3524 .was_assoc = true,
3525 .link_id = ffs(sdata->vif.active_links) - 1,
3526 };
3527
3528 lockdep_assert_wiphy(local->hw.wiphy);
3529
3530 if (WARN_ON_ONCE(tx && !frame_buf))
3531 return;
3532
3533 if (WARN_ON(!ifmgd->associated))
3534 return;
3535
3536 ieee80211_stop_poll(sdata);
3537
3538 ifmgd->associated = false;
3539
3540 /* other links will be destroyed */
3541 sdata->deflink.conf->bss = NULL;
3542 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
3543
3544 netif_carrier_off(sdata->dev);
3545
3546 /*
3547 * if we want to get out of ps before disassoc (why?) we have
3548 * to do it before sending disassoc, as otherwise the null-packet
3549 * won't be valid.
3550 */
3551 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3552 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3553 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
3554 }
3555 local->ps_sdata = NULL;
3556
3557 /* disable per-vif ps */
3558 ieee80211_recalc_ps_vif(sdata);
3559
3560 /* make sure ongoing transmission finishes */
3561 synchronize_net();
3562
3563 /*
3564 * drop any frame before deauth/disassoc, this can be data or
3565 * management frame. Since we are disconnecting, we should not
3566 * insist sending these frames which can take time and delay
3567 * the disconnection and possible the roaming.
3568 */
3569 if (tx)
3570 ieee80211_flush_queues(local, sdata, true);
3571
3572 /* deauthenticate/disassociate now */
3573 if (tx || frame_buf) {
3574 drv_mgd_prepare_tx(sdata->local, sdata, &info);
3575
3576 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr,
3577 sdata->vif.cfg.ap_addr, stype,
3578 reason, tx, frame_buf);
3579 }
3580
3581 /* flush out frame - make sure the deauth was actually sent */
3582 if (tx)
3583 ieee80211_flush_queues(local, sdata, false);
3584
3585 drv_mgd_complete_tx(sdata->local, sdata, &info);
3586
3587 /* clear AP addr only after building the needed mgmt frames */
3588 eth_zero_addr(sdata->deflink.u.mgd.bssid);
3589 eth_zero_addr(sdata->vif.cfg.ap_addr);
3590
3591 sdata->vif.cfg.ssid_len = 0;
3592
3593 /* remove AP and TDLS peers */
3594 sta_info_flush(sdata, -1);
3595
3596 /* finally reset all BSS / config parameters */
3597 if (!ieee80211_vif_is_mld(&sdata->vif))
3598 changed |= ieee80211_reset_erp_info(sdata);
3599
3600 ieee80211_led_assoc(local, 0);
3601 changed |= BSS_CHANGED_ASSOC;
3602 sdata->vif.cfg.assoc = false;
3603
3604 sdata->deflink.u.mgd.p2p_noa_index = -1;
3605 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
3606 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
3607
3608 /* on the next assoc, re-program HT/VHT parameters */
3609 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
3610 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
3611 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
3612 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
3613
3614 /*
3615 * reset MU-MIMO ownership and group data in default link,
3616 * if used, other links are destroyed
3617 */
3618 memset(sdata->vif.bss_conf.mu_group.membership, 0,
3619 sizeof(sdata->vif.bss_conf.mu_group.membership));
3620 memset(sdata->vif.bss_conf.mu_group.position, 0,
3621 sizeof(sdata->vif.bss_conf.mu_group.position));
3622 if (!ieee80211_vif_is_mld(&sdata->vif))
3623 changed |= BSS_CHANGED_MU_GROUPS;
3624 sdata->vif.bss_conf.mu_mimo_owner = false;
3625
3626 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
3627
3628 del_timer_sync(&local->dynamic_ps_timer);
3629 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
3630
3631 /* Disable ARP filtering */
3632 if (sdata->vif.cfg.arp_addr_cnt)
3633 changed |= BSS_CHANGED_ARP_FILTER;
3634
3635 sdata->vif.bss_conf.qos = false;
3636 if (!ieee80211_vif_is_mld(&sdata->vif)) {
3637 changed |= BSS_CHANGED_QOS;
3638 /* The BSSID (not really interesting) and HT changed */
3639 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
3640 ieee80211_bss_info_change_notify(sdata, changed);
3641 } else {
3642 ieee80211_vif_cfg_change_notify(sdata, changed);
3643 }
3644
3645 /* disassociated - set to defaults now */
3646 ieee80211_set_wmm_default(&sdata->deflink, false, false);
3647
3648 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
3649 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
3650 del_timer_sync(&sdata->u.mgd.timer);
3651
3652 sdata->vif.bss_conf.dtim_period = 0;
3653 sdata->vif.bss_conf.beacon_rate = NULL;
3654
3655 sdata->deflink.u.mgd.have_beacon = false;
3656 sdata->deflink.u.mgd.tracking_signal_avg = false;
3657 sdata->deflink.u.mgd.disable_wmm_tracking = false;
3658
3659 ifmgd->flags = 0;
3660
3661 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
3662 struct ieee80211_link_data *link;
3663
3664 link = sdata_dereference(sdata->link[link_id], sdata);
3665 if (!link)
3666 continue;
3667 ieee80211_link_release_channel(link);
3668 }
3669
3670 sdata->vif.bss_conf.csa_active = false;
3671 sdata->deflink.u.mgd.csa.blocked_tx = false;
3672 sdata->deflink.u.mgd.csa.waiting_bcn = false;
3673 sdata->deflink.u.mgd.csa.ignored_same_chan = false;
3674 ieee80211_vif_unblock_queues_csa(sdata);
3675
3676 /* existing TX TSPEC sessions no longer exist */
3677 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
3678 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk);
3679
3680 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP;
3681 sdata->vif.bss_conf.pwr_reduction = 0;
3682 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe);
3683
3684 sdata->vif.cfg.eml_cap = 0;
3685 sdata->vif.cfg.eml_med_sync_delay = 0;
3686 sdata->vif.cfg.mld_capa_op = 0;
3687
3688 memset(&sdata->u.mgd.ttlm_info, 0,
3689 sizeof(sdata->u.mgd.ttlm_info));
3690 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work);
3691
3692 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
3693 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
3694 &ifmgd->neg_ttlm_timeout_work);
3695
3696 sdata->u.mgd.removed_links = 0;
3697 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
3698 &sdata->u.mgd.ml_reconf_work);
3699
3700 wiphy_work_cancel(sdata->local->hw.wiphy,
3701 &ifmgd->teardown_ttlm_work);
3702
3703 ieee80211_vif_set_links(sdata, 0, 0);
3704
3705 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
3706 }
3707
ieee80211_reset_ap_probe(struct ieee80211_sub_if_data * sdata)3708 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
3709 {
3710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3711 struct ieee80211_local *local = sdata->local;
3712
3713 lockdep_assert_wiphy(local->hw.wiphy);
3714
3715 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
3716 return;
3717
3718 __ieee80211_stop_poll(sdata);
3719
3720 ieee80211_recalc_ps(local);
3721
3722 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
3723 return;
3724
3725 /*
3726 * We've received a probe response, but are not sure whether
3727 * we have or will be receiving any beacons or data, so let's
3728 * schedule the timers again, just in case.
3729 */
3730 ieee80211_sta_reset_beacon_monitor(sdata);
3731
3732 mod_timer(&ifmgd->conn_mon_timer,
3733 round_jiffies_up(jiffies +
3734 IEEE80211_CONNECTION_IDLE_TIME));
3735 }
3736
ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,u16 tx_time)3737 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
3738 struct ieee80211_hdr *hdr,
3739 u16 tx_time)
3740 {
3741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3742 u16 tid;
3743 int ac;
3744 struct ieee80211_sta_tx_tspec *tx_tspec;
3745 unsigned long now = jiffies;
3746
3747 if (!ieee80211_is_data_qos(hdr->frame_control))
3748 return;
3749
3750 tid = ieee80211_get_tid(hdr);
3751 ac = ieee80211_ac_from_tid(tid);
3752 tx_tspec = &ifmgd->tx_tspec[ac];
3753
3754 if (likely(!tx_tspec->admitted_time))
3755 return;
3756
3757 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
3758 tx_tspec->consumed_tx_time = 0;
3759 tx_tspec->time_slice_start = now;
3760
3761 if (tx_tspec->downgraded) {
3762 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3763 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
3764 &ifmgd->tx_tspec_wk, 0);
3765 }
3766 }
3767
3768 if (tx_tspec->downgraded)
3769 return;
3770
3771 tx_tspec->consumed_tx_time += tx_time;
3772
3773 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
3774 tx_tspec->downgraded = true;
3775 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
3776 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
3777 &ifmgd->tx_tspec_wk, 0);
3778 }
3779 }
3780
ieee80211_sta_tx_notify(struct ieee80211_sub_if_data * sdata,struct ieee80211_hdr * hdr,bool ack,u16 tx_time)3781 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
3782 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
3783 {
3784 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
3785
3786 if (!ieee80211_is_any_nullfunc(hdr->frame_control) ||
3787 !sdata->u.mgd.probe_send_count)
3788 return;
3789
3790 if (ack)
3791 sdata->u.mgd.probe_send_count = 0;
3792 else
3793 sdata->u.mgd.nullfunc_failed = true;
3794 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
3795 }
3796
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)3797 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata,
3798 const u8 *src, const u8 *dst,
3799 const u8 *ssid, size_t ssid_len,
3800 struct ieee80211_channel *channel)
3801 {
3802 struct sk_buff *skb;
3803
3804 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel,
3805 ssid, ssid_len, NULL, 0,
3806 IEEE80211_PROBE_FLAG_DIRECTED);
3807 if (skb)
3808 ieee80211_tx_skb(sdata, skb);
3809 }
3810
ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data * sdata)3811 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
3812 {
3813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3814 u8 *dst = sdata->vif.cfg.ap_addr;
3815 u8 unicast_limit = max(1, max_probe_tries - 3);
3816 struct sta_info *sta;
3817
3818 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3819
3820 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
3821 return;
3822
3823 /*
3824 * Try sending broadcast probe requests for the last three
3825 * probe requests after the first ones failed since some
3826 * buggy APs only support broadcast probe requests.
3827 */
3828 if (ifmgd->probe_send_count >= unicast_limit)
3829 dst = NULL;
3830
3831 /*
3832 * When the hardware reports an accurate Tx ACK status, it's
3833 * better to send a nullfunc frame instead of a probe request,
3834 * as it will kick us off the AP quickly if we aren't associated
3835 * anymore. The timeout will be reset if the frame is ACKed by
3836 * the AP.
3837 */
3838 ifmgd->probe_send_count++;
3839
3840 if (dst) {
3841 sta = sta_info_get(sdata, dst);
3842 if (!WARN_ON(!sta))
3843 ieee80211_check_fast_rx(sta);
3844 }
3845
3846 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
3847 ifmgd->nullfunc_failed = false;
3848 ieee80211_send_nullfunc(sdata->local, sdata, false);
3849 } else {
3850 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst,
3851 sdata->vif.cfg.ssid,
3852 sdata->vif.cfg.ssid_len,
3853 sdata->deflink.conf->bss->channel);
3854 }
3855
3856 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
3857 run_again(sdata, ifmgd->probe_timeout);
3858 }
3859
ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data * sdata,bool beacon)3860 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
3861 bool beacon)
3862 {
3863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3864 bool already = false;
3865
3866 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3867
3868 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)))
3869 return;
3870
3871 if (!ieee80211_sdata_running(sdata))
3872 return;
3873
3874 if (!ifmgd->associated)
3875 return;
3876
3877 if (sdata->local->tmp_channel || sdata->local->scanning)
3878 return;
3879
3880 if (sdata->local->suspending) {
3881 /* reschedule after resume */
3882 ieee80211_reset_ap_probe(sdata);
3883 return;
3884 }
3885
3886 if (beacon) {
3887 mlme_dbg_ratelimited(sdata,
3888 "detected beacon loss from AP (missed %d beacons) - probing\n",
3889 beacon_loss_count);
3890
3891 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
3892 }
3893
3894 /*
3895 * The driver/our work has already reported this event or the
3896 * connection monitoring has kicked in and we have already sent
3897 * a probe request. Or maybe the AP died and the driver keeps
3898 * reporting until we disassociate...
3899 *
3900 * In either case we have to ignore the current call to this
3901 * function (except for setting the correct probe reason bit)
3902 * because otherwise we would reset the timer every time and
3903 * never check whether we received a probe response!
3904 */
3905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
3906 already = true;
3907
3908 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
3909
3910 if (already)
3911 return;
3912
3913 ieee80211_recalc_ps(sdata->local);
3914
3915 ifmgd->probe_send_count = 0;
3916 ieee80211_mgd_probe_ap_send(sdata);
3917 }
3918
ieee80211_ap_probereq_get(struct ieee80211_hw * hw,struct ieee80211_vif * vif)3919 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3920 struct ieee80211_vif *vif)
3921 {
3922 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3924 struct cfg80211_bss *cbss;
3925 struct sk_buff *skb;
3926 const struct element *ssid;
3927 int ssid_len;
3928
3929 lockdep_assert_wiphy(sdata->local->hw.wiphy);
3930
3931 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
3932 ieee80211_vif_is_mld(&sdata->vif)))
3933 return NULL;
3934
3935 if (ifmgd->associated)
3936 cbss = sdata->deflink.conf->bss;
3937 else if (ifmgd->auth_data)
3938 cbss = ifmgd->auth_data->bss;
3939 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss)
3940 cbss = ifmgd->assoc_data->link[0].bss;
3941 else
3942 return NULL;
3943
3944 rcu_read_lock();
3945 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
3946 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN,
3947 "invalid SSID element (len=%d)",
3948 ssid ? ssid->datalen : -1))
3949 ssid_len = 0;
3950 else
3951 ssid_len = ssid->datalen;
3952
3953 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
3954 (u32) -1, cbss->channel,
3955 ssid->data, ssid_len,
3956 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED);
3957 rcu_read_unlock();
3958
3959 return skb;
3960 }
3961 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
3962
ieee80211_report_disconnect(struct ieee80211_sub_if_data * sdata,const u8 * buf,size_t len,bool tx,u16 reason,bool reconnect)3963 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
3964 const u8 *buf, size_t len, bool tx,
3965 u16 reason, bool reconnect)
3966 {
3967 struct ieee80211_event event = {
3968 .type = MLME_EVENT,
3969 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
3970 .u.mlme.reason = reason,
3971 };
3972
3973 if (tx)
3974 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect);
3975 else
3976 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
3977
3978 drv_event_callback(sdata->local, sdata, &event);
3979 }
3980
__ieee80211_disconnect(struct ieee80211_sub_if_data * sdata)3981 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
3982 {
3983 struct ieee80211_local *local = sdata->local;
3984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3985 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3986 bool tx = false;
3987
3988 lockdep_assert_wiphy(local->hw.wiphy);
3989
3990 if (!ifmgd->associated)
3991 return;
3992
3993 /* only transmit if we have a link that makes that worthwhile */
3994 for (unsigned int link_id = 0;
3995 link_id < ARRAY_SIZE(sdata->link);
3996 link_id++) {
3997 struct ieee80211_link_data *link;
3998
3999 if (!ieee80211_vif_link_active(&sdata->vif, link_id))
4000 continue;
4001
4002 link = sdata_dereference(sdata->link[link_id], sdata);
4003 if (WARN_ON_ONCE(!link))
4004 continue;
4005
4006 if (link->u.mgd.csa.blocked_tx)
4007 continue;
4008
4009 tx = true;
4010 break;
4011 }
4012
4013 if (!ifmgd->driver_disconnect) {
4014 unsigned int link_id;
4015
4016 /*
4017 * AP is probably out of range (or not reachable for another
4018 * reason) so remove the bss structs for that AP. In the case
4019 * of multi-link, it's not clear that all of them really are
4020 * out of range, but if they weren't the driver likely would
4021 * have switched to just have a single link active?
4022 */
4023 for (link_id = 0;
4024 link_id < ARRAY_SIZE(sdata->link);
4025 link_id++) {
4026 struct ieee80211_link_data *link;
4027
4028 link = sdata_dereference(sdata->link[link_id], sdata);
4029 if (!link)
4030 continue;
4031 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss);
4032 link->conf->bss = NULL;
4033 }
4034 }
4035
4036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4037 ifmgd->driver_disconnect ?
4038 WLAN_REASON_DEAUTH_LEAVING :
4039 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4040 tx, frame_buf);
4041 /* the other links will be destroyed */
4042 sdata->vif.bss_conf.csa_active = false;
4043 sdata->deflink.u.mgd.csa.waiting_bcn = false;
4044 sdata->deflink.u.mgd.csa.blocked_tx = false;
4045 ieee80211_vif_unblock_queues_csa(sdata);
4046
4047 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx,
4048 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
4049 ifmgd->reconnect);
4050 ifmgd->reconnect = false;
4051 }
4052
ieee80211_beacon_connection_loss_work(struct wiphy * wiphy,struct wiphy_work * work)4053 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy,
4054 struct wiphy_work *work)
4055 {
4056 struct ieee80211_sub_if_data *sdata =
4057 container_of(work, struct ieee80211_sub_if_data,
4058 u.mgd.beacon_connection_loss_work);
4059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4060
4061 if (ifmgd->connection_loss) {
4062 sdata_info(sdata, "Connection to AP %pM lost\n",
4063 sdata->vif.cfg.ap_addr);
4064 __ieee80211_disconnect(sdata);
4065 ifmgd->connection_loss = false;
4066 } else if (ifmgd->driver_disconnect) {
4067 sdata_info(sdata,
4068 "Driver requested disconnection from AP %pM\n",
4069 sdata->vif.cfg.ap_addr);
4070 __ieee80211_disconnect(sdata);
4071 ifmgd->driver_disconnect = false;
4072 } else {
4073 if (ifmgd->associated)
4074 sdata->deflink.u.mgd.beacon_loss_count++;
4075 ieee80211_mgd_probe_ap(sdata, true);
4076 }
4077 }
4078
ieee80211_csa_connection_drop_work(struct wiphy * wiphy,struct wiphy_work * work)4079 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy,
4080 struct wiphy_work *work)
4081 {
4082 struct ieee80211_sub_if_data *sdata =
4083 container_of(work, struct ieee80211_sub_if_data,
4084 u.mgd.csa_connection_drop_work);
4085
4086 __ieee80211_disconnect(sdata);
4087 }
4088
ieee80211_beacon_loss(struct ieee80211_vif * vif)4089 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
4090 {
4091 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4092 struct ieee80211_hw *hw = &sdata->local->hw;
4093
4094 trace_api_beacon_loss(sdata);
4095
4096 sdata->u.mgd.connection_loss = false;
4097 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
4098 }
4099 EXPORT_SYMBOL(ieee80211_beacon_loss);
4100
ieee80211_connection_loss(struct ieee80211_vif * vif)4101 void ieee80211_connection_loss(struct ieee80211_vif *vif)
4102 {
4103 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4104 struct ieee80211_hw *hw = &sdata->local->hw;
4105
4106 trace_api_connection_loss(sdata);
4107
4108 sdata->u.mgd.connection_loss = true;
4109 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
4110 }
4111 EXPORT_SYMBOL(ieee80211_connection_loss);
4112
ieee80211_disconnect(struct ieee80211_vif * vif,bool reconnect)4113 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect)
4114 {
4115 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4116 struct ieee80211_hw *hw = &sdata->local->hw;
4117
4118 trace_api_disconnect(sdata, reconnect);
4119
4120 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4121 return;
4122
4123 sdata->u.mgd.driver_disconnect = true;
4124 sdata->u.mgd.reconnect = reconnect;
4125 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work);
4126 }
4127 EXPORT_SYMBOL(ieee80211_disconnect);
4128
ieee80211_destroy_auth_data(struct ieee80211_sub_if_data * sdata,bool assoc)4129 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
4130 bool assoc)
4131 {
4132 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
4133
4134 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4135
4136 if (!assoc) {
4137 /*
4138 * we are not authenticated yet, the only timer that could be
4139 * running is the timeout for the authentication response which
4140 * which is not relevant anymore.
4141 */
4142 del_timer_sync(&sdata->u.mgd.timer);
4143 sta_info_destroy_addr(sdata, auth_data->ap_addr);
4144
4145 /* other links are destroyed */
4146 eth_zero_addr(sdata->deflink.u.mgd.bssid);
4147 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
4148 BSS_CHANGED_BSSID);
4149 sdata->u.mgd.flags = 0;
4150
4151 ieee80211_link_release_channel(&sdata->deflink);
4152 ieee80211_vif_set_links(sdata, 0, 0);
4153 }
4154
4155 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
4156 kfree(auth_data);
4157 sdata->u.mgd.auth_data = NULL;
4158 }
4159
4160 enum assoc_status {
4161 ASSOC_SUCCESS,
4162 ASSOC_REJECTED,
4163 ASSOC_TIMEOUT,
4164 ASSOC_ABANDON,
4165 };
4166
ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data * sdata,enum assoc_status status)4167 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
4168 enum assoc_status status)
4169 {
4170 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4171
4172 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4173
4174 if (status != ASSOC_SUCCESS) {
4175 /*
4176 * we are not associated yet, the only timer that could be
4177 * running is the timeout for the association response which
4178 * which is not relevant anymore.
4179 */
4180 del_timer_sync(&sdata->u.mgd.timer);
4181 sta_info_destroy_addr(sdata, assoc_data->ap_addr);
4182
4183 eth_zero_addr(sdata->deflink.u.mgd.bssid);
4184 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
4185 BSS_CHANGED_BSSID);
4186 sdata->u.mgd.flags = 0;
4187 sdata->vif.bss_conf.mu_mimo_owner = false;
4188
4189 if (status != ASSOC_REJECTED) {
4190 struct cfg80211_assoc_failure data = {
4191 .timeout = status == ASSOC_TIMEOUT,
4192 };
4193 int i;
4194
4195 BUILD_BUG_ON(ARRAY_SIZE(data.bss) !=
4196 ARRAY_SIZE(assoc_data->link));
4197
4198 for (i = 0; i < ARRAY_SIZE(data.bss); i++)
4199 data.bss[i] = assoc_data->link[i].bss;
4200
4201 if (ieee80211_vif_is_mld(&sdata->vif))
4202 data.ap_mld_addr = assoc_data->ap_addr;
4203
4204 cfg80211_assoc_failure(sdata->dev, &data);
4205 }
4206
4207 ieee80211_link_release_channel(&sdata->deflink);
4208 ieee80211_vif_set_links(sdata, 0, 0);
4209 }
4210
4211 kfree(assoc_data);
4212 sdata->u.mgd.assoc_data = NULL;
4213 }
4214
ieee80211_auth_challenge(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)4215 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
4216 struct ieee80211_mgmt *mgmt, size_t len)
4217 {
4218 struct ieee80211_local *local = sdata->local;
4219 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
4220 const struct element *challenge;
4221 u8 *pos;
4222 u32 tx_flags = 0;
4223 struct ieee80211_prep_tx_info info = {
4224 .subtype = IEEE80211_STYPE_AUTH,
4225 .link_id = auth_data->link_id,
4226 };
4227
4228 pos = mgmt->u.auth.variable;
4229 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos,
4230 len - (pos - (u8 *)mgmt));
4231 if (!challenge)
4232 return;
4233 auth_data->expected_transaction = 4;
4234 drv_mgd_prepare_tx(sdata->local, sdata, &info);
4235 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
4236 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
4237 IEEE80211_TX_INTFL_MLME_CONN_TX;
4238 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
4239 (void *)challenge,
4240 challenge->datalen + sizeof(*challenge),
4241 auth_data->ap_addr, auth_data->ap_addr,
4242 auth_data->key, auth_data->key_len,
4243 auth_data->key_idx, tx_flags);
4244 }
4245
ieee80211_mark_sta_auth(struct ieee80211_sub_if_data * sdata)4246 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata)
4247 {
4248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4249 const u8 *ap_addr = ifmgd->auth_data->ap_addr;
4250 struct sta_info *sta;
4251
4252 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4253
4254 sdata_info(sdata, "authenticated\n");
4255 ifmgd->auth_data->done = true;
4256 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
4257 ifmgd->auth_data->timeout_started = true;
4258 run_again(sdata, ifmgd->auth_data->timeout);
4259
4260 /* move station state to auth */
4261 sta = sta_info_get(sdata, ap_addr);
4262 if (!sta) {
4263 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr);
4264 return false;
4265 }
4266 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
4267 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr);
4268 return false;
4269 }
4270
4271 return true;
4272 }
4273
ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)4274 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
4275 struct ieee80211_mgmt *mgmt, size_t len)
4276 {
4277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4278 u16 auth_alg, auth_transaction, status_code;
4279 struct ieee80211_event event = {
4280 .type = MLME_EVENT,
4281 .u.mlme.data = AUTH_EVENT,
4282 };
4283 struct ieee80211_prep_tx_info info = {
4284 .subtype = IEEE80211_STYPE_AUTH,
4285 };
4286
4287 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4288
4289 if (len < 24 + 6)
4290 return;
4291
4292 if (!ifmgd->auth_data || ifmgd->auth_data->done)
4293 return;
4294
4295 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid))
4296 return;
4297
4298 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
4299 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
4300 status_code = le16_to_cpu(mgmt->u.auth.status_code);
4301
4302 if (auth_alg != ifmgd->auth_data->algorithm ||
4303 (auth_alg != WLAN_AUTH_SAE &&
4304 auth_transaction != ifmgd->auth_data->expected_transaction) ||
4305 (auth_alg == WLAN_AUTH_SAE &&
4306 (auth_transaction < ifmgd->auth_data->expected_transaction ||
4307 auth_transaction > 2))) {
4308 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
4309 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
4310 auth_transaction,
4311 ifmgd->auth_data->expected_transaction);
4312 goto notify_driver;
4313 }
4314
4315 if (status_code != WLAN_STATUS_SUCCESS) {
4316 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
4317
4318 if (auth_alg == WLAN_AUTH_SAE &&
4319 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED ||
4320 (auth_transaction == 1 &&
4321 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
4322 status_code == WLAN_STATUS_SAE_PK)))) {
4323 /* waiting for userspace now */
4324 ifmgd->auth_data->waiting = true;
4325 ifmgd->auth_data->timeout =
4326 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY;
4327 ifmgd->auth_data->timeout_started = true;
4328 run_again(sdata, ifmgd->auth_data->timeout);
4329 goto notify_driver;
4330 }
4331
4332 sdata_info(sdata, "%pM denied authentication (status %d)\n",
4333 mgmt->sa, status_code);
4334 ieee80211_destroy_auth_data(sdata, false);
4335 event.u.mlme.status = MLME_DENIED;
4336 event.u.mlme.reason = status_code;
4337 drv_event_callback(sdata->local, sdata, &event);
4338 goto notify_driver;
4339 }
4340
4341 switch (ifmgd->auth_data->algorithm) {
4342 case WLAN_AUTH_OPEN:
4343 case WLAN_AUTH_LEAP:
4344 case WLAN_AUTH_FT:
4345 case WLAN_AUTH_SAE:
4346 case WLAN_AUTH_FILS_SK:
4347 case WLAN_AUTH_FILS_SK_PFS:
4348 case WLAN_AUTH_FILS_PK:
4349 break;
4350 case WLAN_AUTH_SHARED_KEY:
4351 if (ifmgd->auth_data->expected_transaction != 4) {
4352 ieee80211_auth_challenge(sdata, mgmt, len);
4353 /* need another frame */
4354 return;
4355 }
4356 break;
4357 default:
4358 WARN_ONCE(1, "invalid auth alg %d",
4359 ifmgd->auth_data->algorithm);
4360 goto notify_driver;
4361 }
4362
4363 event.u.mlme.status = MLME_SUCCESS;
4364 info.success = 1;
4365 drv_event_callback(sdata->local, sdata, &event);
4366 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE ||
4367 (auth_transaction == 2 &&
4368 ifmgd->auth_data->expected_transaction == 2)) {
4369 if (!ieee80211_mark_sta_auth(sdata))
4370 return; /* ignore frame -- wait for timeout */
4371 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
4372 auth_transaction == 2) {
4373 sdata_info(sdata, "SAE peer confirmed\n");
4374 ifmgd->auth_data->peer_confirmed = true;
4375 }
4376
4377 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
4378 notify_driver:
4379 drv_mgd_complete_tx(sdata->local, sdata, &info);
4380 }
4381
4382 #define case_WLAN(type) \
4383 case WLAN_REASON_##type: return #type
4384
ieee80211_get_reason_code_string(u16 reason_code)4385 const char *ieee80211_get_reason_code_string(u16 reason_code)
4386 {
4387 switch (reason_code) {
4388 case_WLAN(UNSPECIFIED);
4389 case_WLAN(PREV_AUTH_NOT_VALID);
4390 case_WLAN(DEAUTH_LEAVING);
4391 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
4392 case_WLAN(DISASSOC_AP_BUSY);
4393 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
4394 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
4395 case_WLAN(DISASSOC_STA_HAS_LEFT);
4396 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
4397 case_WLAN(DISASSOC_BAD_POWER);
4398 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
4399 case_WLAN(INVALID_IE);
4400 case_WLAN(MIC_FAILURE);
4401 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
4402 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
4403 case_WLAN(IE_DIFFERENT);
4404 case_WLAN(INVALID_GROUP_CIPHER);
4405 case_WLAN(INVALID_PAIRWISE_CIPHER);
4406 case_WLAN(INVALID_AKMP);
4407 case_WLAN(UNSUPP_RSN_VERSION);
4408 case_WLAN(INVALID_RSN_IE_CAP);
4409 case_WLAN(IEEE8021X_FAILED);
4410 case_WLAN(CIPHER_SUITE_REJECTED);
4411 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
4412 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
4413 case_WLAN(DISASSOC_LOW_ACK);
4414 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
4415 case_WLAN(QSTA_LEAVE_QBSS);
4416 case_WLAN(QSTA_NOT_USE);
4417 case_WLAN(QSTA_REQUIRE_SETUP);
4418 case_WLAN(QSTA_TIMEOUT);
4419 case_WLAN(QSTA_CIPHER_NOT_SUPP);
4420 case_WLAN(MESH_PEER_CANCELED);
4421 case_WLAN(MESH_MAX_PEERS);
4422 case_WLAN(MESH_CONFIG);
4423 case_WLAN(MESH_CLOSE);
4424 case_WLAN(MESH_MAX_RETRIES);
4425 case_WLAN(MESH_CONFIRM_TIMEOUT);
4426 case_WLAN(MESH_INVALID_GTK);
4427 case_WLAN(MESH_INCONSISTENT_PARAM);
4428 case_WLAN(MESH_INVALID_SECURITY);
4429 case_WLAN(MESH_PATH_ERROR);
4430 case_WLAN(MESH_PATH_NOFORWARD);
4431 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
4432 case_WLAN(MAC_EXISTS_IN_MBSS);
4433 case_WLAN(MESH_CHAN_REGULATORY);
4434 case_WLAN(MESH_CHAN);
4435 default: return "<unknown>";
4436 }
4437 }
4438
ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)4439 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
4440 struct ieee80211_mgmt *mgmt, size_t len)
4441 {
4442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4443 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
4444
4445 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4446
4447 if (len < 24 + 2)
4448 return;
4449
4450 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
4451 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
4452 return;
4453 }
4454
4455 if (ifmgd->associated &&
4456 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) {
4457 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
4458 sdata->vif.cfg.ap_addr, reason_code,
4459 ieee80211_get_reason_code_string(reason_code));
4460
4461 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
4462
4463 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
4464 reason_code, false);
4465 return;
4466 }
4467
4468 if (ifmgd->assoc_data &&
4469 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) {
4470 sdata_info(sdata,
4471 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
4472 ifmgd->assoc_data->ap_addr, reason_code,
4473 ieee80211_get_reason_code_string(reason_code));
4474
4475 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
4476
4477 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
4478 return;
4479 }
4480 }
4481
4482
ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)4483 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
4484 struct ieee80211_mgmt *mgmt, size_t len)
4485 {
4486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4487 u16 reason_code;
4488
4489 lockdep_assert_wiphy(sdata->local->hw.wiphy);
4490
4491 if (len < 24 + 2)
4492 return;
4493
4494 if (!ifmgd->associated ||
4495 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
4496 return;
4497
4498 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
4499
4500 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) {
4501 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code);
4502 return;
4503 }
4504
4505 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
4506 sdata->vif.cfg.ap_addr, reason_code,
4507 ieee80211_get_reason_code_string(reason_code));
4508
4509 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
4510
4511 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code,
4512 false);
4513 }
4514
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)4515 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
4516 u8 *supp_rates, unsigned int supp_rates_len,
4517 u32 *rates, u32 *basic_rates,
4518 bool *have_higher_than_11mbit,
4519 int *min_rate, int *min_rate_index)
4520 {
4521 int i, j;
4522
4523 for (i = 0; i < supp_rates_len; i++) {
4524 int rate = supp_rates[i] & 0x7f;
4525 bool is_basic = !!(supp_rates[i] & 0x80);
4526
4527 if ((rate * 5) > 110)
4528 *have_higher_than_11mbit = true;
4529
4530 /*
4531 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership
4532 * selectors since they're not rates.
4533 *
4534 * Note: Even though the membership selector and the basic
4535 * rate flag share the same bit, they are not exactly
4536 * the same.
4537 */
4538 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
4539 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) ||
4540 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) ||
4541 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) ||
4542 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E))
4543 continue;
4544
4545 for (j = 0; j < sband->n_bitrates; j++) {
4546 struct ieee80211_rate *br;
4547 int brate;
4548
4549 br = &sband->bitrates[j];
4550
4551 brate = DIV_ROUND_UP(br->bitrate, 5);
4552 if (brate == rate) {
4553 *rates |= BIT(j);
4554 if (is_basic)
4555 *basic_rates |= BIT(j);
4556 if ((rate * 5) < *min_rate) {
4557 *min_rate = rate * 5;
4558 *min_rate_index = j;
4559 }
4560 break;
4561 }
4562 }
4563 }
4564 }
4565
ieee80211_twt_req_supported(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct link_sta_info * link_sta,const struct ieee802_11_elems * elems)4566 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata,
4567 struct ieee80211_supported_band *sband,
4568 const struct link_sta_info *link_sta,
4569 const struct ieee802_11_elems *elems)
4570 {
4571 const struct ieee80211_sta_he_cap *own_he_cap =
4572 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4573
4574 if (elems->ext_capab_len < 10)
4575 return false;
4576
4577 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT))
4578 return false;
4579
4580 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] &
4581 IEEE80211_HE_MAC_CAP0_TWT_RES &&
4582 own_he_cap &&
4583 (own_he_cap->he_cap_elem.mac_cap_info[0] &
4584 IEEE80211_HE_MAC_CAP0_TWT_REQ);
4585 }
4586
ieee80211_recalc_twt_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct ieee80211_link_data * link,struct link_sta_info * link_sta,struct ieee802_11_elems * elems)4587 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata,
4588 struct ieee80211_supported_band *sband,
4589 struct ieee80211_link_data *link,
4590 struct link_sta_info *link_sta,
4591 struct ieee802_11_elems *elems)
4592 {
4593 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems);
4594
4595 if (link->conf->twt_requester != twt) {
4596 link->conf->twt_requester = twt;
4597 return BSS_CHANGED_TWT;
4598 }
4599 return 0;
4600 }
4601
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)4602 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata,
4603 struct ieee80211_bss_conf *bss_conf,
4604 struct ieee80211_supported_band *sband,
4605 struct link_sta_info *link_sta)
4606 {
4607 const struct ieee80211_sta_he_cap *own_he_cap =
4608 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4609
4610 return bss_conf->he_support &&
4611 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] &
4612 IEEE80211_HE_MAC_CAP2_BCAST_TWT) &&
4613 own_he_cap &&
4614 (own_he_cap->he_cap_elem.mac_cap_info[2] &
4615 IEEE80211_HE_MAC_CAP2_BCAST_TWT);
4616 }
4617
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)4618 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link,
4619 struct link_sta_info *link_sta,
4620 struct cfg80211_bss *cbss,
4621 struct ieee80211_mgmt *mgmt,
4622 const u8 *elem_start,
4623 unsigned int elem_len,
4624 u64 *changed)
4625 {
4626 struct ieee80211_sub_if_data *sdata = link->sdata;
4627 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
4628 struct ieee80211_bss_conf *bss_conf = link->conf;
4629 struct ieee80211_local *local = sdata->local;
4630 unsigned int link_id = link->link_id;
4631 struct ieee80211_elems_parse_params parse_params = {
4632 .mode = link->u.mgd.conn.mode,
4633 .start = elem_start,
4634 .len = elem_len,
4635 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id,
4636 .from_ap = true,
4637 };
4638 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
4639 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
4640 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
4641 const struct cfg80211_bss_ies *bss_ies = NULL;
4642 struct ieee80211_supported_band *sband;
4643 struct ieee802_11_elems *elems;
4644 const __le16 prof_bss_param_ch_present =
4645 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT);
4646 u16 capab_info;
4647 bool ret;
4648
4649 elems = ieee802_11_parse_elems_full(&parse_params);
4650 if (!elems)
4651 return false;
4652
4653 if (link_id == assoc_data->assoc_link_id) {
4654 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
4655
4656 /*
4657 * we should not get to this flow unless the association was
4658 * successful, so set the status directly to success
4659 */
4660 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS;
4661 if (elems->ml_basic) {
4662 int bss_param_ch_cnt =
4663 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic);
4664
4665 if (bss_param_ch_cnt < 0) {
4666 ret = false;
4667 goto out;
4668 }
4669 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt;
4670 }
4671 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC ||
4672 !elems->prof ||
4673 !(elems->prof->control & prof_bss_param_ch_present)) {
4674 ret = false;
4675 goto out;
4676 } else {
4677 const u8 *ptr = elems->prof->variable +
4678 elems->prof->sta_info_len - 1;
4679
4680 /*
4681 * During parsing, we validated that these fields exist,
4682 * otherwise elems->prof would have been set to NULL.
4683 */
4684 capab_info = get_unaligned_le16(ptr);
4685 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2);
4686 link->u.mgd.bss_param_ch_cnt =
4687 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof);
4688
4689 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
4690 link_info(link, "association response status code=%u\n",
4691 assoc_data->link[link_id].status);
4692 ret = true;
4693 goto out;
4694 }
4695 }
4696
4697 if (!is_s1g && !elems->supp_rates) {
4698 sdata_info(sdata, "no SuppRates element in AssocResp\n");
4699 ret = false;
4700 goto out;
4701 }
4702
4703 link->u.mgd.tdls_chan_switch_prohibited =
4704 elems->ext_capab && elems->ext_capab_len >= 5 &&
4705 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
4706
4707 /*
4708 * Some APs are erroneously not including some information in their
4709 * (re)association response frames. Try to recover by using the data
4710 * from the beacon or probe response. This seems to afflict mobile
4711 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
4712 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
4713 */
4714 if (!is_6ghz &&
4715 ((assoc_data->wmm && !elems->wmm_param) ||
4716 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT &&
4717 (!elems->ht_cap_elem || !elems->ht_operation)) ||
4718 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT &&
4719 (!elems->vht_cap_elem || !elems->vht_operation)))) {
4720 const struct cfg80211_bss_ies *ies;
4721 struct ieee802_11_elems *bss_elems;
4722
4723 rcu_read_lock();
4724 ies = rcu_dereference(cbss->ies);
4725 if (ies)
4726 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
4727 GFP_ATOMIC);
4728 rcu_read_unlock();
4729 if (!bss_ies) {
4730 ret = false;
4731 goto out;
4732 }
4733
4734 parse_params.start = bss_ies->data;
4735 parse_params.len = bss_ies->len;
4736 parse_params.bss = cbss;
4737 bss_elems = ieee802_11_parse_elems_full(&parse_params);
4738 if (!bss_elems) {
4739 ret = false;
4740 goto out;
4741 }
4742
4743 if (assoc_data->wmm &&
4744 !elems->wmm_param && bss_elems->wmm_param) {
4745 elems->wmm_param = bss_elems->wmm_param;
4746 sdata_info(sdata,
4747 "AP bug: WMM param missing from AssocResp\n");
4748 }
4749
4750 /*
4751 * Also check if we requested HT/VHT, otherwise the AP doesn't
4752 * have to include the IEs in the (re)association response.
4753 */
4754 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem &&
4755 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) {
4756 elems->ht_cap_elem = bss_elems->ht_cap_elem;
4757 sdata_info(sdata,
4758 "AP bug: HT capability missing from AssocResp\n");
4759 }
4760 if (!elems->ht_operation && bss_elems->ht_operation &&
4761 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) {
4762 elems->ht_operation = bss_elems->ht_operation;
4763 sdata_info(sdata,
4764 "AP bug: HT operation missing from AssocResp\n");
4765 }
4766 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem &&
4767 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
4768 elems->vht_cap_elem = bss_elems->vht_cap_elem;
4769 sdata_info(sdata,
4770 "AP bug: VHT capa missing from AssocResp\n");
4771 }
4772 if (!elems->vht_operation && bss_elems->vht_operation &&
4773 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
4774 elems->vht_operation = bss_elems->vht_operation;
4775 sdata_info(sdata,
4776 "AP bug: VHT operation missing from AssocResp\n");
4777 }
4778
4779 kfree(bss_elems);
4780 }
4781
4782 /*
4783 * We previously checked these in the beacon/probe response, so
4784 * they should be present here. This is just a safety net.
4785 * Note that the ieee80211_config_bw() below would also check
4786 * for this (and more), but this has better error reporting.
4787 */
4788 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT &&
4789 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) {
4790 sdata_info(sdata,
4791 "HT AP is missing WMM params or HT capability/operation\n");
4792 ret = false;
4793 goto out;
4794 }
4795
4796 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT &&
4797 (!elems->vht_cap_elem || !elems->vht_operation)) {
4798 sdata_info(sdata,
4799 "VHT AP is missing VHT capability/operation\n");
4800 ret = false;
4801 goto out;
4802 }
4803
4804 /* check/update if AP changed anything in assoc response vs. scan */
4805 if (ieee80211_config_bw(link, elems,
4806 link_id == assoc_data->assoc_link_id,
4807 changed)) {
4808 ret = false;
4809 goto out;
4810 }
4811
4812 if (WARN_ON(!link->conf->chanreq.oper.chan)) {
4813 ret = false;
4814 goto out;
4815 }
4816 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band];
4817
4818 /* Set up internal HT/VHT capabilities */
4819 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT)
4820 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
4821 elems->ht_cap_elem,
4822 link_sta);
4823
4824 if (elems->vht_cap_elem &&
4825 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) {
4826 const struct ieee80211_vht_cap *bss_vht_cap = NULL;
4827 const struct cfg80211_bss_ies *ies;
4828
4829 /*
4830 * Cisco AP module 9115 with FW 17.3 has a bug and sends a
4831 * too large maximum MPDU length in the association response
4832 * (indicating 12k) that it cannot actually process ...
4833 * Work around that.
4834 */
4835 rcu_read_lock();
4836 ies = rcu_dereference(cbss->ies);
4837 if (ies) {
4838 const struct element *elem;
4839
4840 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY,
4841 ies->data, ies->len);
4842 if (elem && elem->datalen >= sizeof(*bss_vht_cap))
4843 bss_vht_cap = (const void *)elem->data;
4844 }
4845
4846 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4847 elems->vht_cap_elem,
4848 bss_vht_cap, link_sta);
4849 rcu_read_unlock();
4850 }
4851
4852 if (elems->he_operation &&
4853 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE &&
4854 elems->he_cap) {
4855 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
4856 elems->he_cap,
4857 elems->he_cap_len,
4858 elems->he_6ghz_capa,
4859 link_sta);
4860
4861 bss_conf->he_support = link_sta->pub->he_cap.has_he;
4862 if (elems->rsnx && elems->rsnx_len &&
4863 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) &&
4864 wiphy_ext_feature_isset(local->hw.wiphy,
4865 NL80211_EXT_FEATURE_PROTECTED_TWT))
4866 bss_conf->twt_protected = true;
4867 else
4868 bss_conf->twt_protected = false;
4869
4870 *changed |= ieee80211_recalc_twt_req(sdata, sband, link,
4871 link_sta, elems);
4872
4873 if (elems->eht_operation && elems->eht_cap &&
4874 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) {
4875 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
4876 elems->he_cap,
4877 elems->he_cap_len,
4878 elems->eht_cap,
4879 elems->eht_cap_len,
4880 link_sta);
4881
4882 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht;
4883 } else {
4884 bss_conf->eht_support = false;
4885 }
4886 } else {
4887 bss_conf->he_support = false;
4888 bss_conf->twt_requester = false;
4889 bss_conf->twt_protected = false;
4890 bss_conf->eht_support = false;
4891 }
4892
4893 bss_conf->twt_broadcast =
4894 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta);
4895
4896 if (bss_conf->he_support) {
4897 bss_conf->he_bss_color.color =
4898 le32_get_bits(elems->he_operation->he_oper_params,
4899 IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
4900 bss_conf->he_bss_color.partial =
4901 le32_get_bits(elems->he_operation->he_oper_params,
4902 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR);
4903 bss_conf->he_bss_color.enabled =
4904 !le32_get_bits(elems->he_operation->he_oper_params,
4905 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
4906
4907 if (bss_conf->he_bss_color.enabled)
4908 *changed |= BSS_CHANGED_HE_BSS_COLOR;
4909
4910 bss_conf->htc_trig_based_pkt_ext =
4911 le32_get_bits(elems->he_operation->he_oper_params,
4912 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK);
4913 bss_conf->frame_time_rts_th =
4914 le32_get_bits(elems->he_operation->he_oper_params,
4915 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
4916
4917 bss_conf->uora_exists = !!elems->uora_element;
4918 if (elems->uora_element)
4919 bss_conf->uora_ocw_range = elems->uora_element[0];
4920
4921 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation);
4922 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr);
4923 /* TODO: OPEN: what happens if BSS color disable is set? */
4924 }
4925
4926 if (cbss->transmitted_bss) {
4927 bss_conf->nontransmitted = true;
4928 ether_addr_copy(bss_conf->transmitter_bssid,
4929 cbss->transmitted_bss->bssid);
4930 bss_conf->bssid_indicator = cbss->max_bssid_indicator;
4931 bss_conf->bssid_index = cbss->bssid_index;
4932 }
4933
4934 /*
4935 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
4936 * in their association response, so ignore that data for our own
4937 * configuration. If it changed since the last beacon, we'll get the
4938 * next beacon and update then.
4939 */
4940
4941 /*
4942 * If an operating mode notification IE is present, override the
4943 * NSS calculation (that would be done in rate_control_rate_init())
4944 * and use the # of streams from that element.
4945 */
4946 if (elems->opmode_notif &&
4947 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
4948 u8 nss;
4949
4950 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
4951 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
4952 nss += 1;
4953 link_sta->pub->rx_nss = nss;
4954 }
4955
4956 /*
4957 * Always handle WMM once after association regardless
4958 * of the first value the AP uses. Setting -1 here has
4959 * that effect because the AP values is an unsigned
4960 * 4-bit value.
4961 */
4962 link->u.mgd.wmm_last_param_set = -1;
4963 link->u.mgd.mu_edca_last_param_set = -1;
4964
4965 if (link->u.mgd.disable_wmm_tracking) {
4966 ieee80211_set_wmm_default(link, false, false);
4967 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param,
4968 elems->wmm_param_len,
4969 elems->mu_edca_param_set)) {
4970 /* still enable QoS since we might have HT/VHT */
4971 ieee80211_set_wmm_default(link, false, true);
4972 /* disable WMM tracking in this case to disable
4973 * tracking WMM parameter changes in the beacon if
4974 * the parameters weren't actually valid. Doing so
4975 * avoids changing parameters very strangely when
4976 * the AP is going back and forth between valid and
4977 * invalid parameters.
4978 */
4979 link->u.mgd.disable_wmm_tracking = true;
4980 }
4981
4982 if (elems->max_idle_period_ie) {
4983 bss_conf->max_idle_period =
4984 le16_to_cpu(elems->max_idle_period_ie->max_idle_period);
4985 bss_conf->protected_keep_alive =
4986 !!(elems->max_idle_period_ie->idle_options &
4987 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
4988 *changed |= BSS_CHANGED_KEEP_ALIVE;
4989 } else {
4990 bss_conf->max_idle_period = 0;
4991 bss_conf->protected_keep_alive = false;
4992 }
4993
4994 /* set assoc capability (AID was already set earlier),
4995 * ieee80211_set_associated() will tell the driver */
4996 bss_conf->assoc_capability = capab_info;
4997
4998 ret = true;
4999 out:
5000 kfree(elems);
5001 kfree(bss_ies);
5002 return ret;
5003 }
5004
ieee80211_mgd_setup_link_sta(struct ieee80211_link_data * link,struct sta_info * sta,struct link_sta_info * link_sta,struct cfg80211_bss * cbss)5005 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link,
5006 struct sta_info *sta,
5007 struct link_sta_info *link_sta,
5008 struct cfg80211_bss *cbss)
5009 {
5010 struct ieee80211_sub_if_data *sdata = link->sdata;
5011 struct ieee80211_local *local = sdata->local;
5012 struct ieee80211_bss *bss = (void *)cbss->priv;
5013 u32 rates = 0, basic_rates = 0;
5014 bool have_higher_than_11mbit = false;
5015 int min_rate = INT_MAX, min_rate_index = -1;
5016 struct ieee80211_supported_band *sband;
5017
5018 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN);
5019 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN);
5020
5021 /* TODO: S1G Basic Rate Set is expressed elsewhere */
5022 if (cbss->channel->band == NL80211_BAND_S1GHZ) {
5023 ieee80211_s1g_sta_rate_init(sta);
5024 return 0;
5025 }
5026
5027 sband = local->hw.wiphy->bands[cbss->channel->band];
5028
5029 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len,
5030 &rates, &basic_rates, &have_higher_than_11mbit,
5031 &min_rate, &min_rate_index);
5032
5033 /*
5034 * This used to be a workaround for basic rates missing
5035 * in the association response frame. Now that we no
5036 * longer use the basic rates from there, it probably
5037 * doesn't happen any more, but keep the workaround so
5038 * in case some *other* APs are buggy in different ways
5039 * we can connect -- with a warning.
5040 * Allow this workaround only in case the AP provided at least
5041 * one rate.
5042 */
5043 if (min_rate_index < 0) {
5044 link_info(link, "No legacy rates in association response\n");
5045 return -EINVAL;
5046 } else if (!basic_rates) {
5047 link_info(link, "No basic rates, using min rate instead\n");
5048 basic_rates = BIT(min_rate_index);
5049 }
5050
5051 if (rates)
5052 link_sta->pub->supp_rates[cbss->channel->band] = rates;
5053 else
5054 link_info(link, "No rates found, keeping mandatory only\n");
5055
5056 link->conf->basic_rates = basic_rates;
5057
5058 /* cf. IEEE 802.11 9.2.12 */
5059 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ &&
5060 have_higher_than_11mbit;
5061
5062 return 0;
5063 }
5064
ieee80211_max_rx_chains(struct ieee80211_link_data * link,struct cfg80211_bss * cbss)5065 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link,
5066 struct cfg80211_bss *cbss)
5067 {
5068 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
5069 const struct element *ht_cap_elem, *vht_cap_elem;
5070 const struct cfg80211_bss_ies *ies;
5071 const struct ieee80211_ht_cap *ht_cap;
5072 const struct ieee80211_vht_cap *vht_cap;
5073 const struct ieee80211_he_cap_elem *he_cap;
5074 const struct element *he_cap_elem;
5075 u16 mcs_80_map, mcs_160_map;
5076 int i, mcs_nss_size;
5077 bool support_160;
5078 u8 chains = 1;
5079
5080 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT)
5081 return chains;
5082
5083 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY);
5084 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) {
5085 ht_cap = (void *)ht_cap_elem->data;
5086 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
5087 /*
5088 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
5089 * "Tx Unequal Modulation Supported" fields.
5090 */
5091 }
5092
5093 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT)
5094 return chains;
5095
5096 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
5097 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) {
5098 u8 nss;
5099 u16 tx_mcs_map;
5100
5101 vht_cap = (void *)vht_cap_elem->data;
5102 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
5103 for (nss = 8; nss > 0; nss--) {
5104 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
5105 IEEE80211_VHT_MCS_NOT_SUPPORTED)
5106 break;
5107 }
5108 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
5109 chains = max(chains, nss);
5110 }
5111
5112 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE)
5113 return chains;
5114
5115 ies = rcu_dereference(cbss->ies);
5116 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
5117 ies->data, ies->len);
5118
5119 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
5120 return chains;
5121
5122 /* skip one byte ext_tag_id */
5123 he_cap = (void *)(he_cap_elem->data + 1);
5124 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
5125
5126 /* invalid HE IE */
5127 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
5128 return chains;
5129
5130 /* mcs_nss is right after he_cap info */
5131 he_mcs_nss_supp = (void *)(he_cap + 1);
5132
5133 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
5134
5135 for (i = 7; i >= 0; i--) {
5136 u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
5137
5138 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5139 chains = max_t(u8, chains, i + 1);
5140 break;
5141 }
5142 }
5143
5144 support_160 = he_cap->phy_cap_info[0] &
5145 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
5146
5147 if (!support_160)
5148 return chains;
5149
5150 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
5151 for (i = 7; i >= 0; i--) {
5152 u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
5153
5154 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
5155 chains = max_t(u8, chains, i + 1);
5156 break;
5157 }
5158 }
5159
5160 return chains;
5161 }
5162
5163 static void
ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct cfg80211_assoc_request * req,bool wmm_used,int link_id,struct ieee80211_conn_settings * conn)5164 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata,
5165 struct ieee80211_supported_band *sband,
5166 struct cfg80211_assoc_request *req,
5167 bool wmm_used, int link_id,
5168 struct ieee80211_conn_settings *conn)
5169 {
5170 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap;
5171 bool is_5ghz = sband->band == NL80211_BAND_5GHZ;
5172 bool is_6ghz = sband->band == NL80211_BAND_6GHZ;
5173 const struct ieee80211_sta_he_cap *he_cap;
5174 const struct ieee80211_sta_eht_cap *eht_cap;
5175 struct ieee80211_sta_vht_cap vht_cap;
5176
5177 if (sband->band == NL80211_BAND_S1GHZ) {
5178 conn->mode = IEEE80211_CONN_MODE_S1G;
5179 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5180 mlme_dbg(sdata, "operating as S1G STA\n");
5181 return;
5182 }
5183
5184 conn->mode = IEEE80211_CONN_MODE_LEGACY;
5185 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5186
5187 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
5188
5189 if (req && req->flags & ASSOC_REQ_DISABLE_HT) {
5190 mlme_link_id_dbg(sdata, link_id,
5191 "HT disabled by flag, limiting to legacy\n");
5192 goto out;
5193 }
5194
5195 if (!wmm_used) {
5196 mlme_link_id_dbg(sdata, link_id,
5197 "WMM/QoS not supported, limiting to legacy\n");
5198 goto out;
5199 }
5200
5201 if (req) {
5202 unsigned int i;
5203
5204 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
5205 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
5206 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
5207 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
5208 netdev_info(sdata->dev,
5209 "WEP/TKIP use, limiting to legacy\n");
5210 goto out;
5211 }
5212 }
5213 }
5214
5215 if (!sta_ht_cap.ht_supported && !is_6ghz) {
5216 mlme_link_id_dbg(sdata, link_id,
5217 "HT not supported (and not on 6 GHz), limiting to legacy\n");
5218 goto out;
5219 }
5220
5221 /* HT is fine */
5222 conn->mode = IEEE80211_CONN_MODE_HT;
5223 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
5224 IEEE80211_CONN_BW_LIMIT_40 :
5225 IEEE80211_CONN_BW_LIMIT_20;
5226
5227 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
5228 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
5229
5230 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) {
5231 mlme_link_id_dbg(sdata, link_id,
5232 "VHT disabled by flag, limiting to HT\n");
5233 goto out;
5234 }
5235
5236 if (vht_cap.vht_supported && is_5ghz) {
5237 bool have_80mhz = false;
5238 unsigned int i;
5239
5240 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) {
5241 mlme_link_id_dbg(sdata, link_id,
5242 "no 40 MHz support on 5 GHz, limiting to HT\n");
5243 goto out;
5244 }
5245
5246 /* Allow VHT if at least one channel on the sband supports 80 MHz */
5247 for (i = 0; i < sband->n_channels; i++) {
5248 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
5249 IEEE80211_CHAN_NO_80MHZ))
5250 continue;
5251
5252 have_80mhz = true;
5253 break;
5254 }
5255
5256 if (!have_80mhz) {
5257 mlme_link_id_dbg(sdata, link_id,
5258 "no 80 MHz channel support on 5 GHz, limiting to HT\n");
5259 goto out;
5260 }
5261 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */
5262 mlme_link_id_dbg(sdata, link_id,
5263 "no VHT support on 5 GHz, limiting to HT\n");
5264 goto out;
5265 }
5266
5267 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */
5268 if (sband->band != NL80211_BAND_2GHZ) {
5269 conn->mode = IEEE80211_CONN_MODE_VHT;
5270 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
5271 }
5272
5273 if (is_5ghz &&
5274 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
5275 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
5276 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
5277 mlme_link_id_dbg(sdata, link_id,
5278 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz");
5279 }
5280
5281 if (req && req->flags & ASSOC_REQ_DISABLE_HE) {
5282 mlme_link_id_dbg(sdata, link_id,
5283 "HE disabled by flag, limiting to HT/VHT\n");
5284 goto out;
5285 }
5286
5287 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
5288 if (!he_cap) {
5289 WARN_ON(is_6ghz);
5290 mlme_link_id_dbg(sdata, link_id,
5291 "no HE support, limiting to HT/VHT\n");
5292 goto out;
5293 }
5294
5295 /* so we have HE */
5296 conn->mode = IEEE80211_CONN_MODE_HE;
5297
5298 /* check bandwidth */
5299 switch (sband->band) {
5300 default:
5301 case NL80211_BAND_2GHZ:
5302 if (he_cap->he_cap_elem.phy_cap_info[0] &
5303 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
5304 break;
5305 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5306 mlme_link_id_dbg(sdata, link_id,
5307 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n");
5308 break;
5309 case NL80211_BAND_5GHZ:
5310 if (!(he_cap->he_cap_elem.phy_cap_info[0] &
5311 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
5312 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
5313 mlme_link_id_dbg(sdata, link_id,
5314 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n");
5315 break;
5316 }
5317 if (!(he_cap->he_cap_elem.phy_cap_info[0] &
5318 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) {
5319 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
5320 conn->bw_limit,
5321 IEEE80211_CONN_BW_LIMIT_80);
5322 mlme_link_id_dbg(sdata, link_id,
5323 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n");
5324 }
5325 break;
5326 case NL80211_BAND_6GHZ:
5327 if (he_cap->he_cap_elem.phy_cap_info[0] &
5328 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)
5329 break;
5330 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
5331 conn->bw_limit,
5332 IEEE80211_CONN_BW_LIMIT_80);
5333 mlme_link_id_dbg(sdata, link_id,
5334 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n");
5335 break;
5336 }
5337
5338 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) {
5339 mlme_link_id_dbg(sdata, link_id,
5340 "EHT disabled by flag, limiting to HE\n");
5341 goto out;
5342 }
5343
5344 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
5345 if (!eht_cap) {
5346 mlme_link_id_dbg(sdata, link_id,
5347 "no EHT support, limiting to HE\n");
5348 goto out;
5349 }
5350
5351 /* we have EHT */
5352
5353 conn->mode = IEEE80211_CONN_MODE_EHT;
5354
5355 /* check bandwidth */
5356 if (is_6ghz &&
5357 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
5358 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320;
5359 else if (is_6ghz)
5360 mlme_link_id_dbg(sdata, link_id,
5361 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n");
5362
5363 out:
5364 mlme_link_id_dbg(sdata, link_id,
5365 "determined local STA to be %s, BW limited to %d MHz\n",
5366 ieee80211_conn_mode_str(conn->mode),
5367 20 * (1 << conn->bw_limit));
5368 }
5369
5370 static void
ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct cfg80211_auth_request * req,bool wmm_used,struct ieee80211_conn_settings * conn)5371 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata,
5372 struct ieee80211_supported_band *sband,
5373 struct cfg80211_auth_request *req,
5374 bool wmm_used,
5375 struct ieee80211_conn_settings *conn)
5376 {
5377 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used,
5378 req->link_id > 0 ? req->link_id : 0,
5379 conn);
5380 }
5381
5382 static void
ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,struct cfg80211_assoc_request * req,bool wmm_used,int link_id,struct ieee80211_conn_settings * conn)5383 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata,
5384 struct ieee80211_supported_band *sband,
5385 struct cfg80211_assoc_request *req,
5386 bool wmm_used, int link_id,
5387 struct ieee80211_conn_settings *conn)
5388 {
5389 struct ieee80211_conn_settings tmp;
5390
5391 WARN_ON(!req);
5392
5393 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id,
5394 &tmp);
5395
5396 conn->mode = min_t(enum ieee80211_conn_mode,
5397 conn->mode, tmp.mode);
5398 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit,
5399 conn->bw_limit, tmp.bw_limit);
5400 }
5401
5402 static enum ieee80211_ap_reg_power
ieee80211_ap_power_type(u8 control)5403 ieee80211_ap_power_type(u8 control)
5404 {
5405 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
5406 case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
5407 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP:
5408 return IEEE80211_REG_LPI_AP;
5409 case IEEE80211_6GHZ_CTRL_REG_SP_AP:
5410 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP:
5411 return IEEE80211_REG_SP_AP;
5412 case IEEE80211_6GHZ_CTRL_REG_VLP_AP:
5413 return IEEE80211_REG_VLP_AP;
5414 default:
5415 return IEEE80211_REG_UNSET_AP;
5416 }
5417 }
5418
ieee80211_prep_channel(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,int link_id,struct cfg80211_bss * cbss,bool mlo,struct ieee80211_conn_settings * conn)5419 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
5420 struct ieee80211_link_data *link,
5421 int link_id,
5422 struct cfg80211_bss *cbss, bool mlo,
5423 struct ieee80211_conn_settings *conn)
5424 {
5425 struct ieee80211_local *local = sdata->local;
5426 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
5427 struct ieee80211_chan_req chanreq = {};
5428 struct cfg80211_chan_def ap_chandef;
5429 struct ieee802_11_elems *elems;
5430 int ret;
5431
5432 lockdep_assert_wiphy(local->hw.wiphy);
5433
5434 rcu_read_lock();
5435 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id,
5436 &chanreq, &ap_chandef);
5437
5438 if (IS_ERR(elems)) {
5439 rcu_read_unlock();
5440 return PTR_ERR(elems);
5441 }
5442
5443 if (mlo && !elems->ml_basic) {
5444 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n");
5445 rcu_read_unlock();
5446 kfree(elems);
5447 return -EINVAL;
5448 }
5449
5450 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) {
5451 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
5452
5453 if (elems->pwr_constr_elem)
5454 link->conf->pwr_reduction = *elems->pwr_constr_elem;
5455
5456 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation);
5457 if (he_6ghz_oper)
5458 link->conf->power_type =
5459 ieee80211_ap_power_type(he_6ghz_oper->control);
5460 else
5461 link_info(link,
5462 "HE 6 GHz operation missing (on %d MHz), expect issues\n",
5463 cbss->channel->center_freq);
5464
5465 link->conf->tpe = elems->tpe;
5466 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef,
5467 &chanreq.oper);
5468 }
5469 rcu_read_unlock();
5470 /* the element data was RCU protected so no longer valid anyway */
5471 kfree(elems);
5472 elems = NULL;
5473
5474 if (!link)
5475 return 0;
5476
5477 rcu_read_lock();
5478 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss),
5479 local->rx_chains);
5480 rcu_read_unlock();
5481
5482 /*
5483 * If this fails (possibly due to channel context sharing
5484 * on incompatible channels, e.g. 80+80 and 160 sharing the
5485 * same control channel) try to use a smaller bandwidth.
5486 */
5487 ret = ieee80211_link_use_channel(link, &chanreq,
5488 IEEE80211_CHANCTX_SHARED);
5489
5490 /* don't downgrade for 5 and 10 MHz channels, though. */
5491 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
5492 chanreq.oper.width == NL80211_CHAN_WIDTH_10)
5493 return ret;
5494
5495 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) {
5496 ieee80211_chanreq_downgrade(&chanreq, conn);
5497
5498 ret = ieee80211_link_use_channel(link, &chanreq,
5499 IEEE80211_CHANCTX_SHARED);
5500 }
5501
5502 return ret;
5503 }
5504
ieee80211_get_dtim(const struct cfg80211_bss_ies * ies,u8 * dtim_count,u8 * dtim_period)5505 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies,
5506 u8 *dtim_count, u8 *dtim_period)
5507 {
5508 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len);
5509 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data,
5510 ies->len);
5511 const struct ieee80211_tim_ie *tim = NULL;
5512 const struct ieee80211_bssid_index *idx;
5513 bool valid = tim_ie && tim_ie[1] >= 2;
5514
5515 if (valid)
5516 tim = (void *)(tim_ie + 2);
5517
5518 if (dtim_count)
5519 *dtim_count = valid ? tim->dtim_count : 0;
5520
5521 if (dtim_period)
5522 *dtim_period = valid ? tim->dtim_period : 0;
5523
5524 /* Check if value is overridden by non-transmitted profile */
5525 if (!idx_ie || idx_ie[1] < 3)
5526 return valid;
5527
5528 idx = (void *)(idx_ie + 2);
5529
5530 if (dtim_count)
5531 *dtim_count = idx->dtim_count;
5532
5533 if (dtim_period)
5534 *dtim_period = idx->dtim_period;
5535
5536 return true;
5537 }
5538
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)5539 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
5540 struct ieee80211_mgmt *mgmt,
5541 struct ieee802_11_elems *elems,
5542 const u8 *elem_start, unsigned int elem_len)
5543 {
5544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5546 struct ieee80211_local *local = sdata->local;
5547 unsigned int link_id;
5548 struct sta_info *sta;
5549 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {};
5550 u16 valid_links = 0, dormant_links = 0;
5551 int err;
5552
5553 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5554 /*
5555 * station info was already allocated and inserted before
5556 * the association and should be available to us
5557 */
5558 sta = sta_info_get(sdata, assoc_data->ap_addr);
5559 if (WARN_ON(!sta))
5560 goto out_err;
5561
5562 sta->sta.spp_amsdu = assoc_data->spp_amsdu;
5563
5564 if (ieee80211_vif_is_mld(&sdata->vif)) {
5565 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5566 if (!assoc_data->link[link_id].bss)
5567 continue;
5568
5569 valid_links |= BIT(link_id);
5570 if (assoc_data->link[link_id].disabled)
5571 dormant_links |= BIT(link_id);
5572
5573 if (link_id != assoc_data->assoc_link_id) {
5574 err = ieee80211_sta_allocate_link(sta, link_id);
5575 if (err)
5576 goto out_err;
5577 }
5578 }
5579
5580 ieee80211_vif_set_links(sdata, valid_links, dormant_links);
5581 }
5582
5583 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5584 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
5585 struct ieee80211_link_data *link;
5586 struct link_sta_info *link_sta;
5587
5588 if (!cbss)
5589 continue;
5590
5591 link = sdata_dereference(sdata->link[link_id], sdata);
5592 if (WARN_ON(!link))
5593 goto out_err;
5594
5595 if (ieee80211_vif_is_mld(&sdata->vif))
5596 link_info(link,
5597 "local address %pM, AP link address %pM%s\n",
5598 link->conf->addr,
5599 assoc_data->link[link_id].bss->bssid,
5600 link_id == assoc_data->assoc_link_id ?
5601 " (assoc)" : "");
5602
5603 link_sta = rcu_dereference_protected(sta->link[link_id],
5604 lockdep_is_held(&local->hw.wiphy->mtx));
5605 if (WARN_ON(!link_sta))
5606 goto out_err;
5607
5608 if (!link->u.mgd.have_beacon) {
5609 const struct cfg80211_bss_ies *ies;
5610
5611 rcu_read_lock();
5612 ies = rcu_dereference(cbss->beacon_ies);
5613 if (ies)
5614 link->u.mgd.have_beacon = true;
5615 else
5616 ies = rcu_dereference(cbss->ies);
5617 ieee80211_get_dtim(ies,
5618 &link->conf->sync_dtim_count,
5619 &link->u.mgd.dtim_period);
5620 link->conf->beacon_int = cbss->beacon_interval;
5621 rcu_read_unlock();
5622 }
5623
5624 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1;
5625
5626 if (link_id != assoc_data->assoc_link_id) {
5627 link->u.mgd.conn = assoc_data->link[link_id].conn;
5628
5629 err = ieee80211_prep_channel(sdata, link, link_id, cbss,
5630 true, &link->u.mgd.conn);
5631 if (err) {
5632 link_info(link, "prep_channel failed\n");
5633 goto out_err;
5634 }
5635 }
5636
5637 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta,
5638 assoc_data->link[link_id].bss);
5639 if (err)
5640 goto out_err;
5641
5642 if (!ieee80211_assoc_config_link(link, link_sta,
5643 assoc_data->link[link_id].bss,
5644 mgmt, elem_start, elem_len,
5645 &changed[link_id]))
5646 goto out_err;
5647
5648 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) {
5649 valid_links &= ~BIT(link_id);
5650 ieee80211_sta_remove_link(sta, link_id);
5651 continue;
5652 }
5653
5654 if (link_id != assoc_data->assoc_link_id) {
5655 err = ieee80211_sta_activate_link(sta, link_id);
5656 if (err)
5657 goto out_err;
5658 }
5659 }
5660
5661 /* links might have changed due to rejected ones, set them again */
5662 ieee80211_vif_set_links(sdata, valid_links, dormant_links);
5663
5664 rate_control_rate_init(sta);
5665
5666 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
5667 set_sta_flag(sta, WLAN_STA_MFP);
5668 sta->sta.mfp = true;
5669 } else {
5670 sta->sta.mfp = false;
5671 }
5672
5673 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab,
5674 elems->ext_capab_len);
5675
5676 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) &&
5677 local->hw.queues >= IEEE80211_NUM_ACS;
5678
5679 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
5680 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
5681 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
5682 if (err) {
5683 sdata_info(sdata,
5684 "failed to move station %pM to desired state\n",
5685 sta->sta.addr);
5686 WARN_ON(__sta_info_destroy(sta));
5687 goto out_err;
5688 }
5689
5690 if (sdata->wdev.use_4addr)
5691 drv_sta_set_4addr(local, sdata, &sta->sta, true);
5692
5693 ieee80211_set_associated(sdata, assoc_data, changed);
5694
5695 /*
5696 * If we're using 4-addr mode, let the AP know that we're
5697 * doing so, so that it can create the STA VLAN on its side
5698 */
5699 if (ifmgd->use_4addr)
5700 ieee80211_send_4addr_nullfunc(local, sdata);
5701
5702 /*
5703 * Start timer to probe the connection to the AP now.
5704 * Also start the timer that will detect beacon loss.
5705 */
5706 ieee80211_sta_reset_beacon_monitor(sdata);
5707 ieee80211_sta_reset_conn_monitor(sdata);
5708
5709 return true;
5710 out_err:
5711 eth_zero_addr(sdata->vif.cfg.ap_addr);
5712 return false;
5713 }
5714
ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)5715 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
5716 struct ieee80211_mgmt *mgmt,
5717 size_t len)
5718 {
5719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5720 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
5721 u16 capab_info, status_code, aid;
5722 struct ieee80211_elems_parse_params parse_params = {
5723 .bss = NULL,
5724 .link_id = -1,
5725 .from_ap = true,
5726 };
5727 struct ieee802_11_elems *elems;
5728 int ac;
5729 const u8 *elem_start;
5730 unsigned int elem_len;
5731 bool reassoc;
5732 struct ieee80211_event event = {
5733 .type = MLME_EVENT,
5734 .u.mlme.data = ASSOC_EVENT,
5735 };
5736 struct ieee80211_prep_tx_info info = {};
5737 struct cfg80211_rx_assoc_resp_data resp = {
5738 .uapsd_queues = -1,
5739 };
5740 u8 ap_mld_addr[ETH_ALEN] __aligned(2);
5741 unsigned int link_id;
5742
5743 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5744
5745 if (!assoc_data)
5746 return;
5747
5748 parse_params.mode =
5749 assoc_data->link[assoc_data->assoc_link_id].conn.mode;
5750
5751 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) ||
5752 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa))
5753 return;
5754
5755 /*
5756 * AssocResp and ReassocResp have identical structure, so process both
5757 * of them in this function.
5758 */
5759
5760 if (len < 24 + 6)
5761 return;
5762
5763 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
5764 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
5765 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
5766 if (assoc_data->s1g)
5767 elem_start = mgmt->u.s1g_assoc_resp.variable;
5768 else
5769 elem_start = mgmt->u.assoc_resp.variable;
5770
5771 /*
5772 * Note: this may not be perfect, AP might misbehave - if
5773 * anyone needs to rely on perfect complete notification
5774 * with the exact right subtype, then we need to track what
5775 * we actually transmitted.
5776 */
5777 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ :
5778 IEEE80211_STYPE_ASSOC_REQ;
5779
5780 if (assoc_data->fils_kek_len &&
5781 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
5782 return;
5783
5784 elem_len = len - (elem_start - (u8 *)mgmt);
5785 parse_params.start = elem_start;
5786 parse_params.len = elem_len;
5787 elems = ieee802_11_parse_elems_full(&parse_params);
5788 if (!elems)
5789 goto notify_driver;
5790
5791 if (elems->aid_resp)
5792 aid = le16_to_cpu(elems->aid_resp->aid);
5793 else if (assoc_data->s1g)
5794 aid = 0; /* TODO */
5795 else
5796 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
5797
5798 /*
5799 * The 5 MSB of the AID field are reserved
5800 * (802.11-2016 9.4.1.8 AID field)
5801 */
5802 aid &= 0x7ff;
5803
5804 sdata_info(sdata,
5805 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
5806 reassoc ? "Rea" : "A", assoc_data->ap_addr,
5807 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
5808
5809 ifmgd->broken_ap = false;
5810
5811 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
5812 elems->timeout_int &&
5813 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
5814 u32 tu, ms;
5815
5816 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr,
5817 le32_to_cpu(elems->timeout_int->value));
5818
5819 tu = le32_to_cpu(elems->timeout_int->value);
5820 ms = tu * 1024 / 1000;
5821 sdata_info(sdata,
5822 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
5823 assoc_data->ap_addr, tu, ms);
5824 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
5825 assoc_data->timeout_started = true;
5826 assoc_data->comeback = true;
5827 if (ms > IEEE80211_ASSOC_TIMEOUT)
5828 run_again(sdata, assoc_data->timeout);
5829 goto notify_driver;
5830 }
5831
5832 if (status_code != WLAN_STATUS_SUCCESS) {
5833 sdata_info(sdata, "%pM denied association (code=%d)\n",
5834 assoc_data->ap_addr, status_code);
5835 event.u.mlme.status = MLME_DENIED;
5836 event.u.mlme.reason = status_code;
5837 drv_event_callback(sdata->local, sdata, &event);
5838 } else {
5839 if (aid == 0 || aid > IEEE80211_MAX_AID) {
5840 sdata_info(sdata,
5841 "invalid AID value %d (out of range), turn off PS\n",
5842 aid);
5843 aid = 0;
5844 ifmgd->broken_ap = true;
5845 }
5846
5847 if (ieee80211_vif_is_mld(&sdata->vif)) {
5848 struct ieee80211_mle_basic_common_info *common;
5849
5850 if (!elems->ml_basic) {
5851 sdata_info(sdata,
5852 "MLO association with %pM but no (basic) multi-link element in response!\n",
5853 assoc_data->ap_addr);
5854 goto abandon_assoc;
5855 }
5856
5857 common = (void *)elems->ml_basic->variable;
5858
5859 if (memcmp(assoc_data->ap_addr,
5860 common->mld_mac_addr, ETH_ALEN)) {
5861 sdata_info(sdata,
5862 "AP MLD MAC address mismatch: got %pM expected %pM\n",
5863 common->mld_mac_addr,
5864 assoc_data->ap_addr);
5865 goto abandon_assoc;
5866 }
5867
5868 sdata->vif.cfg.eml_cap =
5869 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic);
5870 sdata->vif.cfg.eml_med_sync_delay =
5871 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic);
5872 sdata->vif.cfg.mld_capa_op =
5873 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic);
5874 }
5875
5876 sdata->vif.cfg.aid = aid;
5877
5878 if (!ieee80211_assoc_success(sdata, mgmt, elems,
5879 elem_start, elem_len)) {
5880 /* oops -- internal error -- send timeout for now */
5881 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
5882 goto notify_driver;
5883 }
5884 event.u.mlme.status = MLME_SUCCESS;
5885 drv_event_callback(sdata->local, sdata, &event);
5886 sdata_info(sdata, "associated\n");
5887
5888 info.success = 1;
5889 }
5890
5891 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
5892 struct ieee80211_link_data *link;
5893
5894 if (!assoc_data->link[link_id].bss)
5895 continue;
5896
5897 resp.links[link_id].bss = assoc_data->link[link_id].bss;
5898 ether_addr_copy(resp.links[link_id].addr,
5899 assoc_data->link[link_id].addr);
5900 resp.links[link_id].status = assoc_data->link[link_id].status;
5901
5902 link = sdata_dereference(sdata->link[link_id], sdata);
5903 if (!link)
5904 continue;
5905
5906 /* get uapsd queues configuration - same for all links */
5907 resp.uapsd_queues = 0;
5908 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
5909 if (link->tx_conf[ac].uapsd)
5910 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
5911 }
5912
5913 if (ieee80211_vif_is_mld(&sdata->vif)) {
5914 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr);
5915 resp.ap_mld_addr = ap_mld_addr;
5916 }
5917
5918 ieee80211_destroy_assoc_data(sdata,
5919 status_code == WLAN_STATUS_SUCCESS ?
5920 ASSOC_SUCCESS :
5921 ASSOC_REJECTED);
5922
5923 resp.buf = (u8 *)mgmt;
5924 resp.len = len;
5925 resp.req_ies = ifmgd->assoc_req_ies;
5926 resp.req_ies_len = ifmgd->assoc_req_ies_len;
5927 cfg80211_rx_assoc_resp(sdata->dev, &resp);
5928 notify_driver:
5929 drv_mgd_complete_tx(sdata->local, sdata, &info);
5930 kfree(elems);
5931 return;
5932 abandon_assoc:
5933 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
5934 goto notify_driver;
5935 }
5936
ieee80211_rx_bss_info(struct ieee80211_link_data * link,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)5937 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link,
5938 struct ieee80211_mgmt *mgmt, size_t len,
5939 struct ieee80211_rx_status *rx_status)
5940 {
5941 struct ieee80211_sub_if_data *sdata = link->sdata;
5942 struct ieee80211_local *local = sdata->local;
5943 struct ieee80211_bss *bss;
5944 struct ieee80211_channel *channel;
5945
5946 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5947
5948 channel = ieee80211_get_channel_khz(local->hw.wiphy,
5949 ieee80211_rx_status_to_khz(rx_status));
5950 if (!channel)
5951 return;
5952
5953 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel);
5954 if (bss) {
5955 link->conf->beacon_rate = bss->beacon_rate;
5956 ieee80211_rx_bss_put(local, bss);
5957 }
5958 }
5959
5960
ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data * link,struct sk_buff * skb)5961 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link,
5962 struct sk_buff *skb)
5963 {
5964 struct ieee80211_sub_if_data *sdata = link->sdata;
5965 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5966 struct ieee80211_if_managed *ifmgd;
5967 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
5968 struct ieee80211_channel *channel;
5969 size_t baselen, len = skb->len;
5970
5971 ifmgd = &sdata->u.mgd;
5972
5973 lockdep_assert_wiphy(sdata->local->hw.wiphy);
5974
5975 /*
5976 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2:
5977 * "If a 6 GHz AP receives a Probe Request frame and responds with
5978 * a Probe Response frame [..], the Address 1 field of the Probe
5979 * Response frame shall be set to the broadcast address [..]"
5980 * So, on 6GHz band we should also accept broadcast responses.
5981 */
5982 channel = ieee80211_get_channel(sdata->local->hw.wiphy,
5983 rx_status->freq);
5984 if (!channel)
5985 return;
5986
5987 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
5988 (channel->band != NL80211_BAND_6GHZ ||
5989 !is_broadcast_ether_addr(mgmt->da)))
5990 return; /* ignore ProbeResp to foreign address */
5991
5992 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
5993 if (baselen > len)
5994 return;
5995
5996 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
5997
5998 if (ifmgd->associated &&
5999 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid))
6000 ieee80211_reset_ap_probe(sdata);
6001 }
6002
6003 /*
6004 * This is the canonical list of information elements we care about,
6005 * the filter code also gives us all changes to the Microsoft OUI
6006 * (00:50:F2) vendor IE which is used for WMM which we need to track,
6007 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
6008 * changes to requested client power.
6009 *
6010 * We implement beacon filtering in software since that means we can
6011 * avoid processing the frame here and in cfg80211, and userspace
6012 * will not be able to tell whether the hardware supports it or not.
6013 *
6014 * XXX: This list needs to be dynamic -- userspace needs to be able to
6015 * add items it requires. It also needs to be able to tell us to
6016 * look out for other vendor IEs.
6017 */
6018 static const u64 care_about_ies =
6019 (1ULL << WLAN_EID_COUNTRY) |
6020 (1ULL << WLAN_EID_ERP_INFO) |
6021 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
6022 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
6023 (1ULL << WLAN_EID_HT_CAPABILITY) |
6024 (1ULL << WLAN_EID_HT_OPERATION) |
6025 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
6026
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)6027 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link,
6028 struct ieee80211_if_managed *ifmgd,
6029 struct ieee80211_bss_conf *bss_conf,
6030 struct ieee80211_local *local,
6031 struct ieee80211_rx_status *rx_status)
6032 {
6033 struct ieee80211_sub_if_data *sdata = link->sdata;
6034
6035 /* Track average RSSI from the Beacon frames of the current AP */
6036
6037 if (!link->u.mgd.tracking_signal_avg) {
6038 link->u.mgd.tracking_signal_avg = true;
6039 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal);
6040 link->u.mgd.last_cqm_event_signal = 0;
6041 link->u.mgd.count_beacon_signal = 1;
6042 link->u.mgd.last_ave_beacon_signal = 0;
6043 } else {
6044 link->u.mgd.count_beacon_signal++;
6045 }
6046
6047 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal,
6048 -rx_status->signal);
6049
6050 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
6051 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
6052 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
6053 int last_sig = link->u.mgd.last_ave_beacon_signal;
6054 struct ieee80211_event event = {
6055 .type = RSSI_EVENT,
6056 };
6057
6058 /*
6059 * if signal crosses either of the boundaries, invoke callback
6060 * with appropriate parameters
6061 */
6062 if (sig > ifmgd->rssi_max_thold &&
6063 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
6064 link->u.mgd.last_ave_beacon_signal = sig;
6065 event.u.rssi.data = RSSI_EVENT_HIGH;
6066 drv_event_callback(local, sdata, &event);
6067 } else if (sig < ifmgd->rssi_min_thold &&
6068 (last_sig >= ifmgd->rssi_max_thold ||
6069 last_sig == 0)) {
6070 link->u.mgd.last_ave_beacon_signal = sig;
6071 event.u.rssi.data = RSSI_EVENT_LOW;
6072 drv_event_callback(local, sdata, &event);
6073 }
6074 }
6075
6076 if (bss_conf->cqm_rssi_thold &&
6077 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
6078 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
6079 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
6080 int last_event = link->u.mgd.last_cqm_event_signal;
6081 int thold = bss_conf->cqm_rssi_thold;
6082 int hyst = bss_conf->cqm_rssi_hyst;
6083
6084 if (sig < thold &&
6085 (last_event == 0 || sig < last_event - hyst)) {
6086 link->u.mgd.last_cqm_event_signal = sig;
6087 ieee80211_cqm_rssi_notify(
6088 &sdata->vif,
6089 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
6090 sig, GFP_KERNEL);
6091 } else if (sig > thold &&
6092 (last_event == 0 || sig > last_event + hyst)) {
6093 link->u.mgd.last_cqm_event_signal = sig;
6094 ieee80211_cqm_rssi_notify(
6095 &sdata->vif,
6096 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
6097 sig, GFP_KERNEL);
6098 }
6099 }
6100
6101 if (bss_conf->cqm_rssi_low &&
6102 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
6103 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal);
6104 int last_event = link->u.mgd.last_cqm_event_signal;
6105 int low = bss_conf->cqm_rssi_low;
6106 int high = bss_conf->cqm_rssi_high;
6107
6108 if (sig < low &&
6109 (last_event == 0 || last_event >= low)) {
6110 link->u.mgd.last_cqm_event_signal = sig;
6111 ieee80211_cqm_rssi_notify(
6112 &sdata->vif,
6113 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
6114 sig, GFP_KERNEL);
6115 } else if (sig > high &&
6116 (last_event == 0 || last_event <= high)) {
6117 link->u.mgd.last_cqm_event_signal = sig;
6118 ieee80211_cqm_rssi_notify(
6119 &sdata->vif,
6120 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
6121 sig, GFP_KERNEL);
6122 }
6123 }
6124 }
6125
ieee80211_rx_our_beacon(const u8 * tx_bssid,struct cfg80211_bss * bss)6126 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid,
6127 struct cfg80211_bss *bss)
6128 {
6129 if (ether_addr_equal(tx_bssid, bss->bssid))
6130 return true;
6131 if (!bss->transmitted_bss)
6132 return false;
6133 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid);
6134 }
6135
ieee80211_ml_reconf_work(struct wiphy * wiphy,struct wiphy_work * work)6136 static void ieee80211_ml_reconf_work(struct wiphy *wiphy,
6137 struct wiphy_work *work)
6138 {
6139 struct ieee80211_sub_if_data *sdata =
6140 container_of(work, struct ieee80211_sub_if_data,
6141 u.mgd.ml_reconf_work.work);
6142 u16 new_valid_links, new_active_links, new_dormant_links;
6143 int ret;
6144
6145 if (!sdata->u.mgd.removed_links)
6146 return;
6147
6148 sdata_info(sdata,
6149 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n",
6150 sdata->vif.valid_links, sdata->u.mgd.removed_links);
6151
6152 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links;
6153 if (new_valid_links == sdata->vif.valid_links)
6154 return;
6155
6156 if (!new_valid_links ||
6157 !(new_valid_links & ~sdata->vif.dormant_links)) {
6158 sdata_info(sdata, "No valid links after reconfiguration\n");
6159 ret = -EINVAL;
6160 goto out;
6161 }
6162
6163 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links;
6164 if (new_active_links != sdata->vif.active_links) {
6165 if (!new_active_links)
6166 new_active_links =
6167 BIT(ffs(new_valid_links &
6168 ~sdata->vif.dormant_links) - 1);
6169
6170 ret = ieee80211_set_active_links(&sdata->vif, new_active_links);
6171 if (ret) {
6172 sdata_info(sdata,
6173 "Failed setting active links\n");
6174 goto out;
6175 }
6176 }
6177
6178 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links;
6179
6180 ret = ieee80211_vif_set_links(sdata, new_valid_links,
6181 new_dormant_links);
6182 if (ret)
6183 sdata_info(sdata, "Failed setting valid links\n");
6184
6185 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS);
6186
6187 out:
6188 if (!ret)
6189 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links);
6190 else
6191 __ieee80211_disconnect(sdata);
6192
6193 sdata->u.mgd.removed_links = 0;
6194 }
6195
ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems)6196 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
6197 struct ieee802_11_elems *elems)
6198 {
6199 const struct element *sub;
6200 unsigned long removed_links = 0;
6201 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {};
6202 u8 link_id;
6203 u32 delay;
6204
6205 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf)
6206 return;
6207
6208 /* Directly parse the sub elements as the common information doesn't
6209 * hold any useful information.
6210 */
6211 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf,
6212 elems->ml_reconf_len) {
6213 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
6214 u8 *pos = prof->variable;
6215 u16 control;
6216
6217 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
6218 continue;
6219
6220 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data,
6221 sub->datalen))
6222 return;
6223
6224 control = le16_to_cpu(prof->control);
6225 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID;
6226
6227 removed_links |= BIT(link_id);
6228
6229 /* the MAC address should not be included, but handle it */
6230 if (control &
6231 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT)
6232 pos += 6;
6233
6234 /* According to Draft P802.11be_D3.0, the control should
6235 * include the AP Removal Timer present. If the AP Removal Timer
6236 * is not present assume immediate removal.
6237 */
6238 if (control &
6239 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT)
6240 link_removal_timeout[link_id] = get_unaligned_le16(pos);
6241 }
6242
6243 removed_links &= sdata->vif.valid_links;
6244 if (!removed_links) {
6245 /* In case the removal was cancelled, abort it */
6246 if (sdata->u.mgd.removed_links) {
6247 sdata->u.mgd.removed_links = 0;
6248 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
6249 &sdata->u.mgd.ml_reconf_work);
6250 }
6251 return;
6252 }
6253
6254 delay = 0;
6255 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) {
6256 struct ieee80211_bss_conf *link_conf =
6257 sdata_dereference(sdata->vif.link_conf[link_id], sdata);
6258 u32 link_delay;
6259
6260 if (!link_conf) {
6261 removed_links &= ~BIT(link_id);
6262 continue;
6263 }
6264
6265 if (link_removal_timeout[link_id] < 1)
6266 link_delay = 0;
6267 else
6268 link_delay = link_conf->beacon_int *
6269 (link_removal_timeout[link_id] - 1);
6270
6271 if (!delay)
6272 delay = link_delay;
6273 else
6274 delay = min(delay, link_delay);
6275 }
6276
6277 sdata->u.mgd.removed_links = removed_links;
6278 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
6279 &sdata->u.mgd.ml_reconf_work,
6280 TU_TO_JIFFIES(delay));
6281 }
6282
ieee80211_ttlm_set_links(struct ieee80211_sub_if_data * sdata,u16 active_links,u16 dormant_links,u16 suspended_links)6283 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata,
6284 u16 active_links, u16 dormant_links,
6285 u16 suspended_links)
6286 {
6287 u64 changed = 0;
6288 int ret;
6289
6290 if (!active_links) {
6291 ret = -EINVAL;
6292 goto out;
6293 }
6294
6295 /* If there is an active negotiated TTLM, it should be discarded by
6296 * the new negotiated/advertised TTLM.
6297 */
6298 if (sdata->vif.neg_ttlm.valid) {
6299 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
6300 sdata->vif.suspended_links = 0;
6301 changed = BSS_CHANGED_MLD_TTLM;
6302 }
6303
6304 if (sdata->vif.active_links != active_links) {
6305 /* usable links are affected when active_links are changed,
6306 * so notify the driver about the status change
6307 */
6308 changed |= BSS_CHANGED_MLD_VALID_LINKS;
6309 active_links &= sdata->vif.active_links;
6310 if (!active_links)
6311 active_links =
6312 BIT(__ffs(sdata->vif.valid_links &
6313 ~dormant_links));
6314 ret = ieee80211_set_active_links(&sdata->vif, active_links);
6315 if (ret) {
6316 sdata_info(sdata, "Failed to set TTLM active links\n");
6317 goto out;
6318 }
6319 }
6320
6321 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links,
6322 dormant_links);
6323 if (ret) {
6324 sdata_info(sdata, "Failed to set TTLM dormant links\n");
6325 goto out;
6326 }
6327
6328 sdata->vif.suspended_links = suspended_links;
6329 if (sdata->vif.suspended_links)
6330 changed |= BSS_CHANGED_MLD_TTLM;
6331
6332 ieee80211_vif_cfg_change_notify(sdata, changed);
6333
6334 out:
6335 if (ret)
6336 ieee80211_disconnect(&sdata->vif, false);
6337
6338 return ret;
6339 }
6340
ieee80211_tid_to_link_map_work(struct wiphy * wiphy,struct wiphy_work * work)6341 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy,
6342 struct wiphy_work *work)
6343 {
6344 u16 new_active_links, new_dormant_links;
6345 struct ieee80211_sub_if_data *sdata =
6346 container_of(work, struct ieee80211_sub_if_data,
6347 u.mgd.ttlm_work.work);
6348
6349 new_active_links = sdata->u.mgd.ttlm_info.map &
6350 sdata->vif.valid_links;
6351 new_dormant_links = ~sdata->u.mgd.ttlm_info.map &
6352 sdata->vif.valid_links;
6353
6354 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0);
6355 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links,
6356 0))
6357 return;
6358
6359 sdata->u.mgd.ttlm_info.active = true;
6360 sdata->u.mgd.ttlm_info.switch_time = 0;
6361 }
6362
ieee80211_get_ttlm(u8 bm_size,u8 * data)6363 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data)
6364 {
6365 if (bm_size == 1)
6366 return *data;
6367 else
6368 return get_unaligned_le16(data);
6369 }
6370
6371 static int
ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data * sdata,const struct ieee80211_ttlm_elem * ttlm,struct ieee80211_adv_ttlm_info * ttlm_info)6372 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata,
6373 const struct ieee80211_ttlm_elem *ttlm,
6374 struct ieee80211_adv_ttlm_info *ttlm_info)
6375 {
6376 /* The element size was already validated in
6377 * ieee80211_tid_to_link_map_size_ok()
6378 */
6379 u8 control, link_map_presence, map_size, tid;
6380 u8 *pos;
6381
6382 memset(ttlm_info, 0, sizeof(*ttlm_info));
6383 pos = (void *)ttlm->optional;
6384 control = ttlm->control;
6385
6386 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) ||
6387 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT))
6388 return 0;
6389
6390 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) !=
6391 IEEE80211_TTLM_DIRECTION_BOTH) {
6392 sdata_info(sdata, "Invalid advertised T2L map direction\n");
6393 return -EINVAL;
6394 }
6395
6396 link_map_presence = *pos;
6397 pos++;
6398
6399 ttlm_info->switch_time = get_unaligned_le16(pos);
6400
6401 /* Since ttlm_info->switch_time == 0 means no switch time, bump it
6402 * by 1.
6403 */
6404 if (!ttlm_info->switch_time)
6405 ttlm_info->switch_time = 1;
6406
6407 pos += 2;
6408
6409 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) {
6410 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16;
6411 pos += 3;
6412 }
6413
6414 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
6415 map_size = 1;
6416 else
6417 map_size = 2;
6418
6419 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall
6420 * not advertise a TID-to-link mapping that does not map all TIDs to the
6421 * same link set, reject frame if not all links have mapping
6422 */
6423 if (link_map_presence != 0xff) {
6424 sdata_info(sdata,
6425 "Invalid advertised T2L mapping presence indicator\n");
6426 return -EINVAL;
6427 }
6428
6429 ttlm_info->map = ieee80211_get_ttlm(map_size, pos);
6430 if (!ttlm_info->map) {
6431 sdata_info(sdata,
6432 "Invalid advertised T2L map for TID 0\n");
6433 return -EINVAL;
6434 }
6435
6436 pos += map_size;
6437
6438 for (tid = 1; tid < 8; tid++) {
6439 u16 map = ieee80211_get_ttlm(map_size, pos);
6440
6441 if (map != ttlm_info->map) {
6442 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n",
6443 tid);
6444 return -EINVAL;
6445 }
6446
6447 pos += map_size;
6448 }
6449 return 0;
6450 }
6451
ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,u64 beacon_ts)6452 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata,
6453 struct ieee802_11_elems *elems,
6454 u64 beacon_ts)
6455 {
6456 u8 i;
6457 int ret;
6458
6459 if (!ieee80211_vif_is_mld(&sdata->vif))
6460 return;
6461
6462 if (!elems->ttlm_num) {
6463 if (sdata->u.mgd.ttlm_info.switch_time) {
6464 /* if a planned TID-to-link mapping was cancelled -
6465 * abort it
6466 */
6467 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
6468 &sdata->u.mgd.ttlm_work);
6469 } else if (sdata->u.mgd.ttlm_info.active) {
6470 /* if no TID-to-link element, set to default mapping in
6471 * which all TIDs are mapped to all setup links
6472 */
6473 ret = ieee80211_vif_set_links(sdata,
6474 sdata->vif.valid_links,
6475 0);
6476 if (ret) {
6477 sdata_info(sdata, "Failed setting valid/dormant links\n");
6478 return;
6479 }
6480 ieee80211_vif_cfg_change_notify(sdata,
6481 BSS_CHANGED_MLD_VALID_LINKS);
6482 }
6483 memset(&sdata->u.mgd.ttlm_info, 0,
6484 sizeof(sdata->u.mgd.ttlm_info));
6485 return;
6486 }
6487
6488 for (i = 0; i < elems->ttlm_num; i++) {
6489 struct ieee80211_adv_ttlm_info ttlm_info;
6490 u32 res;
6491
6492 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i],
6493 &ttlm_info);
6494
6495 if (res) {
6496 __ieee80211_disconnect(sdata);
6497 return;
6498 }
6499
6500 if (ttlm_info.switch_time) {
6501 u16 beacon_ts_tu, st_tu, delay;
6502 u32 delay_jiffies;
6503 u64 mask;
6504
6505 /* The t2l map switch time is indicated with a partial
6506 * TSF value (bits 10 to 25), get the partial beacon TS
6507 * as well, and calc the delay to the start time.
6508 */
6509 mask = GENMASK_ULL(25, 10);
6510 beacon_ts_tu = (beacon_ts & mask) >> 10;
6511 st_tu = ttlm_info.switch_time;
6512 delay = st_tu - beacon_ts_tu;
6513
6514 /*
6515 * If the switch time is far in the future, then it
6516 * could also be the previous switch still being
6517 * announced.
6518 * We can simply ignore it for now, if it is a future
6519 * switch the AP will continue to announce it anyway.
6520 */
6521 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW)
6522 return;
6523
6524 delay_jiffies = TU_TO_JIFFIES(delay);
6525
6526 /* Link switching can take time, so schedule it
6527 * 100ms before to be ready on time
6528 */
6529 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS)
6530 delay_jiffies -=
6531 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS;
6532 else
6533 delay_jiffies = 0;
6534
6535 sdata->u.mgd.ttlm_info = ttlm_info;
6536 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
6537 &sdata->u.mgd.ttlm_work);
6538 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
6539 &sdata->u.mgd.ttlm_work,
6540 delay_jiffies);
6541 return;
6542 }
6543 }
6544 }
6545
6546 static void
ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data * sdata,int reporting_link_id,struct ieee802_11_elems * elems)6547 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata,
6548 int reporting_link_id,
6549 struct ieee802_11_elems *elems)
6550 {
6551 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {};
6552 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {};
6553 const struct element *sub;
6554 const u8 *subelems;
6555 size_t subelems_len;
6556 u8 common_size;
6557 int link_id;
6558
6559 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len))
6560 return;
6561
6562 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic);
6563 subelems = (u8 *)elems->ml_basic + common_size;
6564 subelems_len = elems->ml_basic_len - common_size;
6565
6566 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE,
6567 subelems, subelems_len) {
6568 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
6569 struct ieee80211_link_data *link;
6570 ssize_t len;
6571
6572 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data,
6573 sub->datalen))
6574 continue;
6575
6576 link_id = le16_get_bits(prof->control,
6577 IEEE80211_MLE_STA_CONTROL_LINK_ID);
6578 /* need a valid link ID, but also not our own, both AP bugs */
6579 if (link_id == reporting_link_id ||
6580 link_id >= IEEE80211_MLD_MAX_NUM_LINKS)
6581 continue;
6582
6583 link = sdata_dereference(sdata->link[link_id], sdata);
6584 if (!link)
6585 continue;
6586
6587 len = cfg80211_defragment_element(sub, subelems, subelems_len,
6588 NULL, 0,
6589 IEEE80211_MLE_SUBELEM_FRAGMENT);
6590 if (WARN_ON(len < 0))
6591 continue;
6592
6593 sta_profiles[link_id] = sub;
6594 sta_profiles_len[link_id] = len;
6595 }
6596
6597 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
6598 struct ieee80211_mle_per_sta_profile *prof;
6599 struct ieee802_11_elems *prof_elems;
6600 struct ieee80211_link_data *link;
6601 ssize_t len;
6602
6603 if (link_id == reporting_link_id)
6604 continue;
6605
6606 link = sdata_dereference(sdata->link[link_id], sdata);
6607 if (!link)
6608 continue;
6609
6610 if (!sta_profiles[link_id]) {
6611 prof_elems = NULL;
6612 goto handle;
6613 }
6614
6615 /* we can defragment in-place, won't use the buffer again */
6616 len = cfg80211_defragment_element(sta_profiles[link_id],
6617 subelems, subelems_len,
6618 (void *)sta_profiles[link_id],
6619 sta_profiles_len[link_id],
6620 IEEE80211_MLE_SUBELEM_FRAGMENT);
6621 if (WARN_ON(len != sta_profiles_len[link_id]))
6622 continue;
6623
6624 prof = (void *)sta_profiles[link_id];
6625 prof_elems = ieee802_11_parse_elems(prof->variable +
6626 (prof->sta_info_len - 1),
6627 len -
6628 (prof->sta_info_len - 1),
6629 false, NULL);
6630
6631 /* memory allocation failed - let's hope that's transient */
6632 if (!prof_elems)
6633 continue;
6634
6635 handle:
6636 /*
6637 * FIXME: the timings here are obviously incorrect,
6638 * but only older Intel drivers seem to care, and
6639 * those don't have MLO. If you really need this,
6640 * the problem is having to calculate it with the
6641 * TSF offset etc. The device_timestamp is still
6642 * correct, of course.
6643 */
6644 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems,
6645 IEEE80211_CSA_SOURCE_OTHER_LINK);
6646 kfree(prof_elems);
6647 }
6648 }
6649
ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data * sdata,const struct ieee802_11_elems * elems)6650 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata,
6651 const struct ieee802_11_elems *elems)
6652 {
6653 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg;
6654 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN];
6655
6656 if (!elems->ssid)
6657 return false;
6658
6659 /* hidden SSID: zero length */
6660 if (elems->ssid_len == 0)
6661 return false;
6662
6663 if (elems->ssid_len != cfg->ssid_len)
6664 return true;
6665
6666 /* hidden SSID: zeroed out */
6667 if (memcmp(elems->ssid, zero_ssid, elems->ssid_len))
6668 return false;
6669
6670 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len);
6671 }
6672
ieee80211_rx_mgmt_beacon(struct ieee80211_link_data * link,struct ieee80211_hdr * hdr,size_t len,struct ieee80211_rx_status * rx_status)6673 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
6674 struct ieee80211_hdr *hdr, size_t len,
6675 struct ieee80211_rx_status *rx_status)
6676 {
6677 struct ieee80211_sub_if_data *sdata = link->sdata;
6678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6679 struct ieee80211_bss_conf *bss_conf = link->conf;
6680 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
6681 struct ieee80211_mgmt *mgmt = (void *) hdr;
6682 size_t baselen;
6683 struct ieee802_11_elems *elems;
6684 struct ieee80211_local *local = sdata->local;
6685 struct ieee80211_chanctx_conf *chanctx_conf;
6686 struct ieee80211_supported_band *sband;
6687 struct ieee80211_channel *chan;
6688 struct link_sta_info *link_sta;
6689 struct sta_info *sta;
6690 u64 changed = 0;
6691 bool erp_valid;
6692 u8 erp_value = 0;
6693 u32 ncrc = 0;
6694 u8 *bssid, *variable = mgmt->u.beacon.variable;
6695 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
6696 struct ieee80211_elems_parse_params parse_params = {
6697 .mode = link->u.mgd.conn.mode,
6698 .link_id = -1,
6699 .from_ap = true,
6700 };
6701
6702 lockdep_assert_wiphy(local->hw.wiphy);
6703
6704 /* Process beacon from the current BSS */
6705 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type);
6706 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) {
6707 struct ieee80211_ext *ext = (void *) mgmt;
6708
6709 if (ieee80211_is_s1g_short_beacon(ext->frame_control))
6710 variable = ext->u.s1g_short_beacon.variable;
6711 else
6712 variable = ext->u.s1g_beacon.variable;
6713 }
6714
6715 baselen = (u8 *) variable - (u8 *) mgmt;
6716 if (baselen > len)
6717 return;
6718
6719 parse_params.start = variable;
6720 parse_params.len = len - baselen;
6721
6722 rcu_read_lock();
6723 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf);
6724 if (!chanctx_conf) {
6725 rcu_read_unlock();
6726 return;
6727 }
6728
6729 if (ieee80211_rx_status_to_khz(rx_status) !=
6730 ieee80211_channel_to_khz(chanctx_conf->def.chan)) {
6731 rcu_read_unlock();
6732 return;
6733 }
6734 chan = chanctx_conf->def.chan;
6735 rcu_read_unlock();
6736
6737 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
6738 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) &&
6739 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) {
6740 parse_params.bss = ifmgd->assoc_data->link[0].bss;
6741 elems = ieee802_11_parse_elems_full(&parse_params);
6742 if (!elems)
6743 return;
6744
6745 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
6746
6747 if (elems->dtim_period)
6748 link->u.mgd.dtim_period = elems->dtim_period;
6749 link->u.mgd.have_beacon = true;
6750 ifmgd->assoc_data->need_beacon = false;
6751 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
6752 !ieee80211_is_s1g_beacon(hdr->frame_control)) {
6753 bss_conf->sync_tsf =
6754 le64_to_cpu(mgmt->u.beacon.timestamp);
6755 bss_conf->sync_device_ts =
6756 rx_status->device_timestamp;
6757 bss_conf->sync_dtim_count = elems->dtim_count;
6758 }
6759
6760 if (elems->mbssid_config_ie)
6761 bss_conf->profile_periodicity =
6762 elems->mbssid_config_ie->profile_periodicity;
6763 else
6764 bss_conf->profile_periodicity = 0;
6765
6766 if (elems->ext_capab_len >= 11 &&
6767 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
6768 bss_conf->ema_ap = true;
6769 else
6770 bss_conf->ema_ap = false;
6771
6772 /* continue assoc process */
6773 ifmgd->assoc_data->timeout = jiffies;
6774 ifmgd->assoc_data->timeout_started = true;
6775 run_again(sdata, ifmgd->assoc_data->timeout);
6776 kfree(elems);
6777 return;
6778 }
6779
6780 if (!ifmgd->associated ||
6781 !ieee80211_rx_our_beacon(bssid, bss_conf->bss))
6782 return;
6783 bssid = link->u.mgd.bssid;
6784
6785 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
6786 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf,
6787 local, rx_status);
6788
6789 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
6790 mlme_dbg_ratelimited(sdata,
6791 "cancelling AP probe due to a received beacon\n");
6792 ieee80211_reset_ap_probe(sdata);
6793 }
6794
6795 /*
6796 * Push the beacon loss detection into the future since
6797 * we are processing a beacon from the AP just now.
6798 */
6799 ieee80211_sta_reset_beacon_monitor(sdata);
6800
6801 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility
6802 * element (which carries the beacon interval). Don't forget to add a
6803 * bit to care_about_ies[] above if mac80211 is interested in a
6804 * changing S1G element.
6805 */
6806 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
6807 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
6808 parse_params.bss = bss_conf->bss;
6809 parse_params.filter = care_about_ies;
6810 parse_params.crc = ncrc;
6811 elems = ieee802_11_parse_elems_full(&parse_params);
6812 if (!elems)
6813 return;
6814
6815 if (rx_status->flag & RX_FLAG_DECRYPTED &&
6816 ieee80211_mgd_ssid_mismatch(sdata, elems)) {
6817 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n",
6818 sdata->vif.cfg.ap_addr);
6819 __ieee80211_disconnect(sdata);
6820 return;
6821 }
6822
6823 ncrc = elems->crc;
6824
6825 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
6826 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) {
6827 if (local->hw.conf.dynamic_ps_timeout > 0) {
6828 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
6829 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
6830 ieee80211_hw_config(local,
6831 IEEE80211_CONF_CHANGE_PS);
6832 }
6833 ieee80211_send_nullfunc(local, sdata, false);
6834 } else if (!local->pspolling && sdata->u.mgd.powersave) {
6835 local->pspolling = true;
6836
6837 /*
6838 * Here is assumed that the driver will be
6839 * able to send ps-poll frame and receive a
6840 * response even though power save mode is
6841 * enabled, but some drivers might require
6842 * to disable power save here. This needs
6843 * to be investigated.
6844 */
6845 ieee80211_send_pspoll(local, sdata);
6846 }
6847 }
6848
6849 if (sdata->vif.p2p ||
6850 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
6851 struct ieee80211_p2p_noa_attr noa = {};
6852 int ret;
6853
6854 ret = cfg80211_get_p2p_attr(variable,
6855 len - baselen,
6856 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
6857 (u8 *) &noa, sizeof(noa));
6858 if (ret >= 2) {
6859 if (link->u.mgd.p2p_noa_index != noa.index) {
6860 /* valid noa_attr and index changed */
6861 link->u.mgd.p2p_noa_index = noa.index;
6862 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
6863 changed |= BSS_CHANGED_P2P_PS;
6864 /*
6865 * make sure we update all information, the CRC
6866 * mechanism doesn't look at P2P attributes.
6867 */
6868 link->u.mgd.beacon_crc_valid = false;
6869 }
6870 } else if (link->u.mgd.p2p_noa_index != -1) {
6871 /* noa_attr not found and we had valid noa_attr before */
6872 link->u.mgd.p2p_noa_index = -1;
6873 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
6874 changed |= BSS_CHANGED_P2P_PS;
6875 link->u.mgd.beacon_crc_valid = false;
6876 }
6877 }
6878
6879 /*
6880 * Update beacon timing and dtim count on every beacon appearance. This
6881 * will allow the driver to use the most updated values. Do it before
6882 * comparing this one with last received beacon.
6883 * IMPORTANT: These parameters would possibly be out of sync by the time
6884 * the driver will use them. The synchronized view is currently
6885 * guaranteed only in certain callbacks.
6886 */
6887 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
6888 !ieee80211_is_s1g_beacon(hdr->frame_control)) {
6889 bss_conf->sync_tsf =
6890 le64_to_cpu(mgmt->u.beacon.timestamp);
6891 bss_conf->sync_device_ts =
6892 rx_status->device_timestamp;
6893 bss_conf->sync_dtim_count = elems->dtim_count;
6894 }
6895
6896 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) ||
6897 ieee80211_is_s1g_short_beacon(mgmt->frame_control))
6898 goto free;
6899 link->u.mgd.beacon_crc = ncrc;
6900 link->u.mgd.beacon_crc_valid = true;
6901
6902 ieee80211_rx_bss_info(link, mgmt, len, rx_status);
6903
6904 ieee80211_sta_process_chanswitch(link, rx_status->mactime,
6905 rx_status->device_timestamp,
6906 elems, elems,
6907 IEEE80211_CSA_SOURCE_BEACON);
6908
6909 /* note that after this elems->ml_basic can no longer be used fully */
6910 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems);
6911
6912 if (!link->u.mgd.disable_wmm_tracking &&
6913 ieee80211_sta_wmm_params(local, link, elems->wmm_param,
6914 elems->wmm_param_len,
6915 elems->mu_edca_param_set))
6916 changed |= BSS_CHANGED_QOS;
6917
6918 /*
6919 * If we haven't had a beacon before, tell the driver about the
6920 * DTIM period (and beacon timing if desired) now.
6921 */
6922 if (!link->u.mgd.have_beacon) {
6923 /* a few bogus AP send dtim_period = 0 or no TIM IE */
6924 bss_conf->dtim_period = elems->dtim_period ?: 1;
6925
6926 changed |= BSS_CHANGED_BEACON_INFO;
6927 link->u.mgd.have_beacon = true;
6928
6929 ieee80211_recalc_ps(local);
6930
6931 ieee80211_recalc_ps_vif(sdata);
6932 }
6933
6934 if (elems->erp_info) {
6935 erp_valid = true;
6936 erp_value = elems->erp_info[0];
6937 } else {
6938 erp_valid = false;
6939 }
6940
6941 if (!ieee80211_is_s1g_beacon(hdr->frame_control))
6942 changed |= ieee80211_handle_bss_capability(link,
6943 le16_to_cpu(mgmt->u.beacon.capab_info),
6944 erp_valid, erp_value);
6945
6946 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
6947 if (WARN_ON(!sta)) {
6948 goto free;
6949 }
6950 link_sta = rcu_dereference_protected(sta->link[link->link_id],
6951 lockdep_is_held(&local->hw.wiphy->mtx));
6952 if (WARN_ON(!link_sta)) {
6953 goto free;
6954 }
6955
6956 if (WARN_ON(!bss_conf->chanreq.oper.chan))
6957 goto free;
6958
6959 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band];
6960
6961 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems);
6962
6963 if (ieee80211_config_bw(link, elems, true, &changed)) {
6964 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
6965 WLAN_REASON_DEAUTH_LEAVING,
6966 true, deauth_buf);
6967 ieee80211_report_disconnect(sdata, deauth_buf,
6968 sizeof(deauth_buf), true,
6969 WLAN_REASON_DEAUTH_LEAVING,
6970 false);
6971 goto free;
6972 }
6973
6974 if (elems->opmode_notif)
6975 ieee80211_vht_handle_opmode(sdata, link_sta,
6976 *elems->opmode_notif,
6977 rx_status->band);
6978
6979 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt,
6980 elems->country_elem,
6981 elems->country_elem_len,
6982 elems->pwr_constr_elem,
6983 elems->cisco_dtpc_elem);
6984
6985 ieee80211_ml_reconfiguration(sdata, elems);
6986 ieee80211_process_adv_ttlm(sdata, elems,
6987 le64_to_cpu(mgmt->u.beacon.timestamp));
6988
6989 ieee80211_link_info_change_notify(sdata, link, changed);
6990 free:
6991 kfree(elems);
6992 }
6993
ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data * sdata,struct ieee80211_neg_ttlm neg_ttlm)6994 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata,
6995 struct ieee80211_neg_ttlm neg_ttlm)
6996 {
6997 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0;
6998 u8 i;
6999
7000 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++)
7001 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i];
7002
7003 /* If there is an active TTLM, unset previously suspended links */
7004 if (sdata->vif.neg_ttlm.valid)
7005 sdata->vif.dormant_links &= ~sdata->vif.suspended_links;
7006
7007 /* exclude links that are already disabled by advertised TTLM */
7008 new_active_links =
7009 map & sdata->vif.valid_links & ~sdata->vif.dormant_links;
7010 new_suspended_links =
7011 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links;
7012 new_dormant_links = sdata->vif.dormant_links | new_suspended_links;
7013 if (ieee80211_ttlm_set_links(sdata, new_active_links,
7014 new_dormant_links, new_suspended_links))
7015 return;
7016
7017 sdata->vif.neg_ttlm = neg_ttlm;
7018 sdata->vif.neg_ttlm.valid = true;
7019 }
7020
ieee80211_neg_ttlm_timeout_work(struct wiphy * wiphy,struct wiphy_work * work)7021 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy,
7022 struct wiphy_work *work)
7023 {
7024 struct ieee80211_sub_if_data *sdata =
7025 container_of(work, struct ieee80211_sub_if_data,
7026 u.mgd.neg_ttlm_timeout_work.work);
7027
7028 sdata_info(sdata,
7029 "No negotiated TTLM response from AP, disconnecting.\n");
7030
7031 __ieee80211_disconnect(sdata);
7032 }
7033
7034 static void
ieee80211_neg_ttlm_add_suggested_map(struct sk_buff * skb,struct ieee80211_neg_ttlm * neg_ttlm)7035 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb,
7036 struct ieee80211_neg_ttlm *neg_ttlm)
7037 {
7038 u8 i, direction[IEEE80211_TTLM_MAX_CNT];
7039
7040 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink,
7041 sizeof(neg_ttlm->downlink))) {
7042 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN;
7043 direction[1] = IEEE80211_TTLM_DIRECTION_UP;
7044 } else {
7045 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH;
7046 }
7047
7048 for (i = 0; i < ARRAY_SIZE(direction); i++) {
7049 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos;
7050 __le16 map;
7051
7052 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1;
7053
7054 pos = skb_put(skb, len + 2);
7055 *pos++ = WLAN_EID_EXTENSION;
7056 len_pos = pos++;
7057 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING;
7058 *pos++ = direction[i];
7059 map_ind_pos = pos++;
7060 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7061 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ?
7062 cpu_to_le16(neg_ttlm->uplink[tid]) :
7063 cpu_to_le16(neg_ttlm->downlink[tid]);
7064 if (!map)
7065 continue;
7066
7067 len += 2;
7068 map_ind |= BIT(tid);
7069 skb_put_data(skb, &map, sizeof(map));
7070 }
7071
7072 *map_ind_pos = map_ind;
7073 *len_pos = len;
7074
7075 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH)
7076 break;
7077 }
7078 }
7079
7080 static void
ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_neg_ttlm * neg_ttlm,u8 dialog_token)7081 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
7082 struct ieee80211_neg_ttlm *neg_ttlm,
7083 u8 dialog_token)
7084 {
7085 struct ieee80211_local *local = sdata->local;
7086 struct ieee80211_mgmt *mgmt;
7087 struct sk_buff *skb;
7088 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req);
7089 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 +
7090 2 * 2 * IEEE80211_TTLM_NUM_TIDS;
7091
7092 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len);
7093 if (!skb)
7094 return;
7095
7096 skb_reserve(skb, local->tx_headroom);
7097 mgmt = skb_put_zero(skb, hdr_len);
7098 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
7099 IEEE80211_STYPE_ACTION);
7100 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
7101 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
7102 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
7103
7104 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
7105 mgmt->u.action.u.ttlm_req.action_code =
7106 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ;
7107 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token;
7108 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
7109 ieee80211_tx_skb(sdata, skb);
7110 }
7111
ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data * sdata,struct cfg80211_ttlm_params * params)7112 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata,
7113 struct cfg80211_ttlm_params *params)
7114 {
7115 struct ieee80211_neg_ttlm neg_ttlm = {};
7116 u8 i;
7117
7118 if (!ieee80211_vif_is_mld(&sdata->vif) ||
7119 !(sdata->vif.cfg.mld_capa_op &
7120 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP))
7121 return -EINVAL;
7122
7123 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) {
7124 if ((params->dlink[i] & ~sdata->vif.valid_links) ||
7125 (params->ulink[i] & ~sdata->vif.valid_links))
7126 return -EINVAL;
7127
7128 neg_ttlm.downlink[i] = params->dlink[i];
7129 neg_ttlm.uplink[i] = params->ulink[i];
7130 }
7131
7132 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) !=
7133 NEG_TTLM_RES_ACCEPT)
7134 return -EINVAL;
7135
7136 ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
7137 sdata->u.mgd.dialog_token_alloc++;
7138 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm,
7139 sdata->u.mgd.dialog_token_alloc);
7140 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
7141 &sdata->u.mgd.neg_ttlm_timeout_work);
7142 wiphy_delayed_work_queue(sdata->local->hw.wiphy,
7143 &sdata->u.mgd.neg_ttlm_timeout_work,
7144 IEEE80211_NEG_TTLM_REQ_TIMEOUT);
7145 return 0;
7146 }
7147
7148 static void
ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data * sdata,enum ieee80211_neg_ttlm_res ttlm_res,u8 dialog_token,struct ieee80211_neg_ttlm * neg_ttlm)7149 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
7150 enum ieee80211_neg_ttlm_res ttlm_res,
7151 u8 dialog_token,
7152 struct ieee80211_neg_ttlm *neg_ttlm)
7153 {
7154 struct ieee80211_local *local = sdata->local;
7155 struct ieee80211_mgmt *mgmt;
7156 struct sk_buff *skb;
7157 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res);
7158 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 +
7159 2 * 2 * IEEE80211_TTLM_NUM_TIDS;
7160
7161 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len);
7162 if (!skb)
7163 return;
7164
7165 skb_reserve(skb, local->tx_headroom);
7166 mgmt = skb_put_zero(skb, hdr_len);
7167 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
7168 IEEE80211_STYPE_ACTION);
7169 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
7170 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
7171 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
7172
7173 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
7174 mgmt->u.action.u.ttlm_res.action_code =
7175 WLAN_PROTECTED_EHT_ACTION_TTLM_RES;
7176 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token;
7177 switch (ttlm_res) {
7178 default:
7179 WARN_ON(1);
7180 fallthrough;
7181 case NEG_TTLM_RES_REJECT:
7182 mgmt->u.action.u.ttlm_res.status_code =
7183 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING;
7184 break;
7185 case NEG_TTLM_RES_ACCEPT:
7186 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS;
7187 break;
7188 case NEG_TTLM_RES_SUGGEST_PREFERRED:
7189 mgmt->u.action.u.ttlm_res.status_code =
7190 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED;
7191 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm);
7192 break;
7193 }
7194
7195 ieee80211_tx_skb(sdata, skb);
7196 }
7197
7198 static int
ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data * sdata,const struct ieee80211_ttlm_elem * ttlm,struct ieee80211_neg_ttlm * neg_ttlm,u8 * direction)7199 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata,
7200 const struct ieee80211_ttlm_elem *ttlm,
7201 struct ieee80211_neg_ttlm *neg_ttlm,
7202 u8 *direction)
7203 {
7204 u8 control, link_map_presence, map_size, tid;
7205 u8 *pos;
7206
7207 /* The element size was already validated in
7208 * ieee80211_tid_to_link_map_size_ok()
7209 */
7210 pos = (void *)ttlm->optional;
7211
7212 control = ttlm->control;
7213
7214 /* mapping switch time and expected duration fields are not expected
7215 * in case of negotiated TTLM
7216 */
7217 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT |
7218 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) {
7219 mlme_dbg(sdata,
7220 "Invalid TTLM element in negotiated TTLM request\n");
7221 return -EINVAL;
7222 }
7223
7224 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) {
7225 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7226 neg_ttlm->downlink[tid] = sdata->vif.valid_links;
7227 neg_ttlm->uplink[tid] = sdata->vif.valid_links;
7228 }
7229 *direction = IEEE80211_TTLM_DIRECTION_BOTH;
7230 return 0;
7231 }
7232
7233 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION);
7234 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN &&
7235 *direction != IEEE80211_TTLM_DIRECTION_UP &&
7236 *direction != IEEE80211_TTLM_DIRECTION_BOTH)
7237 return -EINVAL;
7238
7239 link_map_presence = *pos;
7240 pos++;
7241
7242 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE)
7243 map_size = 1;
7244 else
7245 map_size = 2;
7246
7247 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) {
7248 u16 map;
7249
7250 if (link_map_presence & BIT(tid)) {
7251 map = ieee80211_get_ttlm(map_size, pos);
7252 if (!map) {
7253 mlme_dbg(sdata,
7254 "No active links for TID %d", tid);
7255 return -EINVAL;
7256 }
7257 } else {
7258 map = 0;
7259 }
7260
7261 switch (*direction) {
7262 case IEEE80211_TTLM_DIRECTION_BOTH:
7263 neg_ttlm->downlink[tid] = map;
7264 neg_ttlm->uplink[tid] = map;
7265 break;
7266 case IEEE80211_TTLM_DIRECTION_DOWN:
7267 neg_ttlm->downlink[tid] = map;
7268 break;
7269 case IEEE80211_TTLM_DIRECTION_UP:
7270 neg_ttlm->uplink[tid] = map;
7271 break;
7272 default:
7273 return -EINVAL;
7274 }
7275 pos += map_size;
7276 }
7277 return 0;
7278 }
7279
ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)7280 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
7281 struct ieee80211_mgmt *mgmt, size_t len)
7282 {
7283 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i;
7284 size_t ies_len;
7285 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT;
7286 struct ieee802_11_elems *elems = NULL;
7287 struct ieee80211_neg_ttlm neg_ttlm = {};
7288
7289 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm));
7290
7291 if (!ieee80211_vif_is_mld(&sdata->vif))
7292 return;
7293
7294 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token;
7295 ies_len = len - offsetof(struct ieee80211_mgmt,
7296 u.action.u.ttlm_req.variable);
7297 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable,
7298 ies_len, true, NULL);
7299 if (!elems) {
7300 ttlm_res = NEG_TTLM_RES_REJECT;
7301 goto out;
7302 }
7303
7304 for (i = 0; i < elems->ttlm_num; i++) {
7305 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i],
7306 &neg_ttlm, &direction[i]) ||
7307 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH &&
7308 elems->ttlm_num != 1)) {
7309 ttlm_res = NEG_TTLM_RES_REJECT;
7310 goto out;
7311 }
7312 }
7313
7314 if (!elems->ttlm_num ||
7315 (elems->ttlm_num == 2 && direction[0] == direction[1])) {
7316 ttlm_res = NEG_TTLM_RES_REJECT;
7317 goto out;
7318 }
7319
7320 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) {
7321 if ((neg_ttlm.downlink[i] &&
7322 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) ||
7323 (neg_ttlm.uplink[i] &&
7324 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) {
7325 ttlm_res = NEG_TTLM_RES_REJECT;
7326 goto out;
7327 }
7328 }
7329
7330 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm);
7331
7332 if (ttlm_res != NEG_TTLM_RES_ACCEPT)
7333 goto out;
7334
7335 ieee80211_apply_neg_ttlm(sdata, neg_ttlm);
7336 out:
7337 kfree(elems);
7338 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm);
7339 }
7340
ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)7341 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
7342 struct ieee80211_mgmt *mgmt, size_t len)
7343 {
7344 if (!ieee80211_vif_is_mld(&sdata->vif) ||
7345 mgmt->u.action.u.ttlm_req.dialog_token !=
7346 sdata->u.mgd.dialog_token_alloc)
7347 return;
7348
7349 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
7350 &sdata->u.mgd.neg_ttlm_timeout_work);
7351
7352 /* MLD station sends a TID to link mapping request, mainly to handle
7353 * BTM (BSS transition management) request, in which case it needs to
7354 * restrict the active links set.
7355 * In this case it's not expected that the MLD AP will reject the
7356 * negotiated TTLM request.
7357 * This can be better implemented in the future, to handle request
7358 * rejections.
7359 */
7360 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS)
7361 __ieee80211_disconnect(sdata);
7362 }
7363
ieee80211_teardown_ttlm_work(struct wiphy * wiphy,struct wiphy_work * work)7364 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy,
7365 struct wiphy_work *work)
7366 {
7367 u16 new_dormant_links;
7368 struct ieee80211_sub_if_data *sdata =
7369 container_of(work, struct ieee80211_sub_if_data,
7370 u.mgd.teardown_ttlm_work);
7371
7372 if (!sdata->vif.neg_ttlm.valid)
7373 return;
7374
7375 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm));
7376 new_dormant_links =
7377 sdata->vif.dormant_links & ~sdata->vif.suspended_links;
7378 sdata->vif.suspended_links = 0;
7379 ieee80211_vif_set_links(sdata, sdata->vif.valid_links,
7380 new_dormant_links);
7381 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM |
7382 BSS_CHANGED_MLD_VALID_LINKS);
7383 }
7384
ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif * vif)7385 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif)
7386 {
7387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
7388 struct ieee80211_local *local = sdata->local;
7389 struct ieee80211_mgmt *mgmt;
7390 struct sk_buff *skb;
7391 int frame_len = offsetofend(struct ieee80211_mgmt,
7392 u.action.u.ttlm_tear_down);
7393 struct ieee80211_tx_info *info;
7394
7395 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len);
7396 if (!skb)
7397 return;
7398
7399 skb_reserve(skb, local->hw.extra_tx_headroom);
7400 mgmt = skb_put_zero(skb, frame_len);
7401 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
7402 IEEE80211_STYPE_ACTION);
7403 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
7404 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
7405 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
7406
7407 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT;
7408 mgmt->u.action.u.ttlm_tear_down.action_code =
7409 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN;
7410
7411 info = IEEE80211_SKB_CB(skb);
7412 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
7413 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM;
7414 ieee80211_tx_skb(sdata, skb);
7415 }
7416 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm);
7417
ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)7418 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
7419 struct sk_buff *skb)
7420 {
7421 struct ieee80211_link_data *link = &sdata->deflink;
7422 struct ieee80211_rx_status *rx_status;
7423 struct ieee80211_hdr *hdr;
7424 u16 fc;
7425
7426 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7427
7428 rx_status = (struct ieee80211_rx_status *) skb->cb;
7429 hdr = (struct ieee80211_hdr *) skb->data;
7430 fc = le16_to_cpu(hdr->frame_control);
7431
7432 switch (fc & IEEE80211_FCTL_STYPE) {
7433 case IEEE80211_STYPE_S1G_BEACON:
7434 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status);
7435 break;
7436 }
7437 }
7438
ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)7439 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
7440 struct sk_buff *skb)
7441 {
7442 struct ieee80211_link_data *link = &sdata->deflink;
7443 struct ieee80211_rx_status *rx_status;
7444 struct ieee802_11_elems *elems;
7445 struct ieee80211_mgmt *mgmt;
7446 u16 fc;
7447 int ies_len;
7448
7449 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7450
7451 rx_status = (struct ieee80211_rx_status *) skb->cb;
7452 mgmt = (struct ieee80211_mgmt *) skb->data;
7453 fc = le16_to_cpu(mgmt->frame_control);
7454
7455 if (rx_status->link_valid) {
7456 link = sdata_dereference(sdata->link[rx_status->link_id],
7457 sdata);
7458 if (!link)
7459 return;
7460 }
7461
7462 switch (fc & IEEE80211_FCTL_STYPE) {
7463 case IEEE80211_STYPE_BEACON:
7464 ieee80211_rx_mgmt_beacon(link, (void *)mgmt,
7465 skb->len, rx_status);
7466 break;
7467 case IEEE80211_STYPE_PROBE_RESP:
7468 ieee80211_rx_mgmt_probe_resp(link, skb);
7469 break;
7470 case IEEE80211_STYPE_AUTH:
7471 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
7472 break;
7473 case IEEE80211_STYPE_DEAUTH:
7474 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
7475 break;
7476 case IEEE80211_STYPE_DISASSOC:
7477 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
7478 break;
7479 case IEEE80211_STYPE_ASSOC_RESP:
7480 case IEEE80211_STYPE_REASSOC_RESP:
7481 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
7482 break;
7483 case IEEE80211_STYPE_ACTION:
7484 if (!sdata->u.mgd.associated ||
7485 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr))
7486 break;
7487
7488 switch (mgmt->u.action.category) {
7489 case WLAN_CATEGORY_SPECTRUM_MGMT:
7490 ies_len = skb->len -
7491 offsetof(struct ieee80211_mgmt,
7492 u.action.u.chan_switch.variable);
7493
7494 if (ies_len < 0)
7495 break;
7496
7497 /* CSA IE cannot be overridden, no need for BSSID */
7498 elems = ieee802_11_parse_elems(
7499 mgmt->u.action.u.chan_switch.variable,
7500 ies_len, true, NULL);
7501
7502 if (elems && !elems->parse_error) {
7503 enum ieee80211_csa_source src =
7504 IEEE80211_CSA_SOURCE_PROT_ACTION;
7505
7506 ieee80211_sta_process_chanswitch(link,
7507 rx_status->mactime,
7508 rx_status->device_timestamp,
7509 elems, elems,
7510 src);
7511 }
7512 kfree(elems);
7513 break;
7514 case WLAN_CATEGORY_PUBLIC:
7515 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION:
7516 ies_len = skb->len -
7517 offsetof(struct ieee80211_mgmt,
7518 u.action.u.ext_chan_switch.variable);
7519
7520 if (ies_len < 0)
7521 break;
7522
7523 /*
7524 * extended CSA IE can't be overridden, no need for
7525 * BSSID
7526 */
7527 elems = ieee802_11_parse_elems(
7528 mgmt->u.action.u.ext_chan_switch.variable,
7529 ies_len, true, NULL);
7530
7531 if (elems && !elems->parse_error) {
7532 enum ieee80211_csa_source src;
7533
7534 if (mgmt->u.action.category ==
7535 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION)
7536 src = IEEE80211_CSA_SOURCE_PROT_ACTION;
7537 else
7538 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION;
7539
7540 /* for the handling code pretend it was an IE */
7541 elems->ext_chansw_ie =
7542 &mgmt->u.action.u.ext_chan_switch.data;
7543
7544 ieee80211_sta_process_chanswitch(link,
7545 rx_status->mactime,
7546 rx_status->device_timestamp,
7547 elems, elems,
7548 src);
7549 }
7550
7551 kfree(elems);
7552 break;
7553 }
7554 break;
7555 }
7556 }
7557
ieee80211_sta_timer(struct timer_list * t)7558 static void ieee80211_sta_timer(struct timer_list *t)
7559 {
7560 struct ieee80211_sub_if_data *sdata =
7561 from_timer(sdata, t, u.mgd.timer);
7562
7563 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
7564 }
7565
ieee80211_sta_connection_lost(struct ieee80211_sub_if_data * sdata,u8 reason,bool tx)7566 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
7567 u8 reason, bool tx)
7568 {
7569 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7570
7571 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
7572 tx, frame_buf);
7573
7574 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
7575 reason, false);
7576 }
7577
ieee80211_auth(struct ieee80211_sub_if_data * sdata)7578 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
7579 {
7580 struct ieee80211_local *local = sdata->local;
7581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7582 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
7583 u32 tx_flags = 0;
7584 u16 trans = 1;
7585 u16 status = 0;
7586 struct ieee80211_prep_tx_info info = {
7587 .subtype = IEEE80211_STYPE_AUTH,
7588 };
7589
7590 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7591
7592 if (WARN_ON_ONCE(!auth_data))
7593 return -EINVAL;
7594
7595 auth_data->tries++;
7596
7597 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
7598 sdata_info(sdata, "authentication with %pM timed out\n",
7599 auth_data->ap_addr);
7600
7601 /*
7602 * Most likely AP is not in the range so remove the
7603 * bss struct for that AP.
7604 */
7605 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
7606
7607 return -ETIMEDOUT;
7608 }
7609
7610 if (auth_data->algorithm == WLAN_AUTH_SAE)
7611 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE);
7612
7613 info.link_id = auth_data->link_id;
7614 drv_mgd_prepare_tx(local, sdata, &info);
7615
7616 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
7617 auth_data->ap_addr, auth_data->tries,
7618 IEEE80211_AUTH_MAX_TRIES);
7619
7620 auth_data->expected_transaction = 2;
7621
7622 if (auth_data->algorithm == WLAN_AUTH_SAE) {
7623 trans = auth_data->sae_trans;
7624 status = auth_data->sae_status;
7625 auth_data->expected_transaction = trans;
7626 }
7627
7628 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
7629 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
7630 IEEE80211_TX_INTFL_MLME_CONN_TX;
7631
7632 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
7633 auth_data->data, auth_data->data_len,
7634 auth_data->ap_addr, auth_data->ap_addr,
7635 NULL, 0, 0, tx_flags);
7636
7637 if (tx_flags == 0) {
7638 if (auth_data->algorithm == WLAN_AUTH_SAE)
7639 auth_data->timeout = jiffies +
7640 IEEE80211_AUTH_TIMEOUT_SAE;
7641 else
7642 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
7643 } else {
7644 auth_data->timeout =
7645 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
7646 }
7647
7648 auth_data->timeout_started = true;
7649 run_again(sdata, auth_data->timeout);
7650
7651 return 0;
7652 }
7653
ieee80211_do_assoc(struct ieee80211_sub_if_data * sdata)7654 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
7655 {
7656 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
7657 struct ieee80211_local *local = sdata->local;
7658 int ret;
7659
7660 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7661
7662 assoc_data->tries++;
7663 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
7664 sdata_info(sdata, "association with %pM timed out\n",
7665 assoc_data->ap_addr);
7666
7667 /*
7668 * Most likely AP is not in the range so remove the
7669 * bss struct for that AP.
7670 */
7671 cfg80211_unlink_bss(local->hw.wiphy,
7672 assoc_data->link[assoc_data->assoc_link_id].bss);
7673
7674 return -ETIMEDOUT;
7675 }
7676
7677 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
7678 assoc_data->ap_addr, assoc_data->tries,
7679 IEEE80211_ASSOC_MAX_TRIES);
7680 ret = ieee80211_send_assoc(sdata);
7681 if (ret)
7682 return ret;
7683
7684 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
7685 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
7686 assoc_data->timeout_started = true;
7687 run_again(sdata, assoc_data->timeout);
7688 } else {
7689 assoc_data->timeout =
7690 round_jiffies_up(jiffies +
7691 IEEE80211_ASSOC_TIMEOUT_LONG);
7692 assoc_data->timeout_started = true;
7693 run_again(sdata, assoc_data->timeout);
7694 }
7695
7696 return 0;
7697 }
7698
ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data * sdata,__le16 fc,bool acked)7699 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
7700 __le16 fc, bool acked)
7701 {
7702 struct ieee80211_local *local = sdata->local;
7703
7704 sdata->u.mgd.status_fc = fc;
7705 sdata->u.mgd.status_acked = acked;
7706 sdata->u.mgd.status_received = true;
7707
7708 wiphy_work_queue(local->hw.wiphy, &sdata->work);
7709 }
7710
ieee80211_sta_work(struct ieee80211_sub_if_data * sdata)7711 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
7712 {
7713 struct ieee80211_local *local = sdata->local;
7714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7715
7716 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7717
7718 if (ifmgd->status_received) {
7719 __le16 fc = ifmgd->status_fc;
7720 bool status_acked = ifmgd->status_acked;
7721
7722 ifmgd->status_received = false;
7723 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
7724 if (status_acked) {
7725 if (ifmgd->auth_data->algorithm ==
7726 WLAN_AUTH_SAE)
7727 ifmgd->auth_data->timeout =
7728 jiffies +
7729 IEEE80211_AUTH_TIMEOUT_SAE;
7730 else
7731 ifmgd->auth_data->timeout =
7732 jiffies +
7733 IEEE80211_AUTH_TIMEOUT_SHORT;
7734 run_again(sdata, ifmgd->auth_data->timeout);
7735 } else {
7736 ifmgd->auth_data->timeout = jiffies - 1;
7737 }
7738 ifmgd->auth_data->timeout_started = true;
7739 } else if (ifmgd->assoc_data &&
7740 !ifmgd->assoc_data->comeback &&
7741 (ieee80211_is_assoc_req(fc) ||
7742 ieee80211_is_reassoc_req(fc))) {
7743 /*
7744 * Update association timeout based on the TX status
7745 * for the (Re)Association Request frame. Skip this if
7746 * we have already processed a (Re)Association Response
7747 * frame that indicated need for association comeback
7748 * at a specific time in the future. This could happen
7749 * if the TX status information is delayed enough for
7750 * the response to be received and processed first.
7751 */
7752 if (status_acked) {
7753 ifmgd->assoc_data->timeout =
7754 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
7755 run_again(sdata, ifmgd->assoc_data->timeout);
7756 } else {
7757 ifmgd->assoc_data->timeout = jiffies - 1;
7758 }
7759 ifmgd->assoc_data->timeout_started = true;
7760 }
7761 }
7762
7763 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
7764 time_after(jiffies, ifmgd->auth_data->timeout)) {
7765 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) {
7766 /*
7767 * ok ... we waited for assoc or continuation but
7768 * userspace didn't do it, so kill the auth data
7769 */
7770 ieee80211_destroy_auth_data(sdata, false);
7771 } else if (ieee80211_auth(sdata)) {
7772 u8 ap_addr[ETH_ALEN];
7773 struct ieee80211_event event = {
7774 .type = MLME_EVENT,
7775 .u.mlme.data = AUTH_EVENT,
7776 .u.mlme.status = MLME_TIMEOUT,
7777 };
7778
7779 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN);
7780
7781 ieee80211_destroy_auth_data(sdata, false);
7782
7783 cfg80211_auth_timeout(sdata->dev, ap_addr);
7784 drv_event_callback(sdata->local, sdata, &event);
7785 }
7786 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
7787 run_again(sdata, ifmgd->auth_data->timeout);
7788
7789 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
7790 time_after(jiffies, ifmgd->assoc_data->timeout)) {
7791 if ((ifmgd->assoc_data->need_beacon &&
7792 !sdata->deflink.u.mgd.have_beacon) ||
7793 ieee80211_do_assoc(sdata)) {
7794 struct ieee80211_event event = {
7795 .type = MLME_EVENT,
7796 .u.mlme.data = ASSOC_EVENT,
7797 .u.mlme.status = MLME_TIMEOUT,
7798 };
7799
7800 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
7801 drv_event_callback(sdata->local, sdata, &event);
7802 }
7803 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
7804 run_again(sdata, ifmgd->assoc_data->timeout);
7805
7806 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
7807 ifmgd->associated) {
7808 u8 *bssid = sdata->deflink.u.mgd.bssid;
7809 int max_tries;
7810
7811 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
7812 max_tries = max_nullfunc_tries;
7813 else
7814 max_tries = max_probe_tries;
7815
7816 /* ACK received for nullfunc probing frame */
7817 if (!ifmgd->probe_send_count)
7818 ieee80211_reset_ap_probe(sdata);
7819 else if (ifmgd->nullfunc_failed) {
7820 if (ifmgd->probe_send_count < max_tries) {
7821 mlme_dbg(sdata,
7822 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
7823 bssid, ifmgd->probe_send_count,
7824 max_tries);
7825 ieee80211_mgd_probe_ap_send(sdata);
7826 } else {
7827 mlme_dbg(sdata,
7828 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
7829 bssid);
7830 ieee80211_sta_connection_lost(sdata,
7831 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
7832 false);
7833 }
7834 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
7835 run_again(sdata, ifmgd->probe_timeout);
7836 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
7837 mlme_dbg(sdata,
7838 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
7839 bssid, probe_wait_ms);
7840 ieee80211_sta_connection_lost(sdata,
7841 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
7842 } else if (ifmgd->probe_send_count < max_tries) {
7843 mlme_dbg(sdata,
7844 "No probe response from AP %pM after %dms, try %d/%i\n",
7845 bssid, probe_wait_ms,
7846 ifmgd->probe_send_count, max_tries);
7847 ieee80211_mgd_probe_ap_send(sdata);
7848 } else {
7849 /*
7850 * We actually lost the connection ... or did we?
7851 * Let's make sure!
7852 */
7853 mlme_dbg(sdata,
7854 "No probe response from AP %pM after %dms, disconnecting.\n",
7855 bssid, probe_wait_ms);
7856
7857 ieee80211_sta_connection_lost(sdata,
7858 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
7859 }
7860 }
7861 }
7862
ieee80211_sta_bcn_mon_timer(struct timer_list * t)7863 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
7864 {
7865 struct ieee80211_sub_if_data *sdata =
7866 from_timer(sdata, t, u.mgd.bcn_mon_timer);
7867
7868 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
7869 return;
7870
7871 if (sdata->vif.bss_conf.csa_active &&
7872 !sdata->deflink.u.mgd.csa.waiting_bcn)
7873 return;
7874
7875 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
7876 return;
7877
7878 sdata->u.mgd.connection_loss = false;
7879 wiphy_work_queue(sdata->local->hw.wiphy,
7880 &sdata->u.mgd.beacon_connection_loss_work);
7881 }
7882
ieee80211_sta_conn_mon_timer(struct timer_list * t)7883 static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
7884 {
7885 struct ieee80211_sub_if_data *sdata =
7886 from_timer(sdata, t, u.mgd.conn_mon_timer);
7887 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7888 struct ieee80211_local *local = sdata->local;
7889 struct sta_info *sta;
7890 unsigned long timeout;
7891
7892 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif)))
7893 return;
7894
7895 if (sdata->vif.bss_conf.csa_active &&
7896 !sdata->deflink.u.mgd.csa.waiting_bcn)
7897 return;
7898
7899 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
7900 if (!sta)
7901 return;
7902
7903 timeout = sta->deflink.status_stats.last_ack;
7904 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx))
7905 timeout = sta->deflink.rx_stats.last_rx;
7906 timeout += IEEE80211_CONNECTION_IDLE_TIME;
7907
7908 /* If timeout is after now, then update timer to fire at
7909 * the later date, but do not actually probe at this time.
7910 */
7911 if (time_is_after_jiffies(timeout)) {
7912 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout));
7913 return;
7914 }
7915
7916 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work);
7917 }
7918
ieee80211_sta_monitor_work(struct wiphy * wiphy,struct wiphy_work * work)7919 static void ieee80211_sta_monitor_work(struct wiphy *wiphy,
7920 struct wiphy_work *work)
7921 {
7922 struct ieee80211_sub_if_data *sdata =
7923 container_of(work, struct ieee80211_sub_if_data,
7924 u.mgd.monitor_work);
7925
7926 ieee80211_mgd_probe_ap(sdata, false);
7927 }
7928
ieee80211_restart_sta_timer(struct ieee80211_sub_if_data * sdata)7929 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
7930 {
7931 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
7932 __ieee80211_stop_poll(sdata);
7933
7934 /* let's probe the connection once */
7935 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7936 wiphy_work_queue(sdata->local->hw.wiphy,
7937 &sdata->u.mgd.monitor_work);
7938 }
7939 }
7940
7941 #ifdef CONFIG_PM
ieee80211_mgd_quiesce(struct ieee80211_sub_if_data * sdata)7942 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
7943 {
7944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7945 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
7946
7947 lockdep_assert_wiphy(sdata->local->hw.wiphy);
7948
7949 if (ifmgd->auth_data || ifmgd->assoc_data) {
7950 const u8 *ap_addr = ifmgd->auth_data ?
7951 ifmgd->auth_data->ap_addr :
7952 ifmgd->assoc_data->ap_addr;
7953
7954 /*
7955 * If we are trying to authenticate / associate while suspending,
7956 * cfg80211 won't know and won't actually abort those attempts,
7957 * thus we need to do that ourselves.
7958 */
7959 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr,
7960 IEEE80211_STYPE_DEAUTH,
7961 WLAN_REASON_DEAUTH_LEAVING,
7962 false, frame_buf);
7963 if (ifmgd->assoc_data)
7964 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
7965 if (ifmgd->auth_data)
7966 ieee80211_destroy_auth_data(sdata, false);
7967 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
7968 IEEE80211_DEAUTH_FRAME_LEN,
7969 false);
7970 }
7971
7972 /* This is a bit of a hack - we should find a better and more generic
7973 * solution to this. Normally when suspending, cfg80211 will in fact
7974 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
7975 * auth (not so important) or assoc (this is the problem) process.
7976 *
7977 * As a consequence, it can happen that we are in the process of both
7978 * associating and suspending, and receive an association response
7979 * after cfg80211 has checked if it needs to disconnect, but before
7980 * we actually set the flag to drop incoming frames. This will then
7981 * cause the workqueue flush to process the association response in
7982 * the suspend, resulting in a successful association just before it
7983 * tries to remove the interface from the driver, which now though
7984 * has a channel context assigned ... this results in issues.
7985 *
7986 * To work around this (for now) simply deauth here again if we're
7987 * now connected.
7988 */
7989 if (ifmgd->associated && !sdata->local->wowlan) {
7990 u8 bssid[ETH_ALEN];
7991 struct cfg80211_deauth_request req = {
7992 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
7993 .bssid = bssid,
7994 };
7995
7996 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN);
7997 ieee80211_mgd_deauth(sdata, &req);
7998 }
7999 }
8000 #endif
8001
ieee80211_sta_restart(struct ieee80211_sub_if_data * sdata)8002 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
8003 {
8004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8005
8006 lockdep_assert_wiphy(sdata->local->hw.wiphy);
8007
8008 if (!ifmgd->associated)
8009 return;
8010
8011 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
8012 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
8013 mlme_dbg(sdata, "driver requested disconnect after resume\n");
8014 ieee80211_sta_connection_lost(sdata,
8015 WLAN_REASON_UNSPECIFIED,
8016 true);
8017 return;
8018 }
8019
8020 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
8021 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
8022 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
8023 ieee80211_sta_connection_lost(sdata,
8024 WLAN_REASON_UNSPECIFIED,
8025 true);
8026 return;
8027 }
8028 }
8029
ieee80211_request_smps_mgd_work(struct wiphy * wiphy,struct wiphy_work * work)8030 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy,
8031 struct wiphy_work *work)
8032 {
8033 struct ieee80211_link_data *link =
8034 container_of(work, struct ieee80211_link_data,
8035 u.mgd.request_smps_work);
8036
8037 __ieee80211_request_smps_mgd(link->sdata, link,
8038 link->u.mgd.driver_smps_mode);
8039 }
8040
8041 /* interface setup */
ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data * sdata)8042 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
8043 {
8044 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8045
8046 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
8047 wiphy_work_init(&ifmgd->beacon_connection_loss_work,
8048 ieee80211_beacon_connection_loss_work);
8049 wiphy_work_init(&ifmgd->csa_connection_drop_work,
8050 ieee80211_csa_connection_drop_work);
8051 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work,
8052 ieee80211_tdls_peer_del_work);
8053 wiphy_delayed_work_init(&ifmgd->ml_reconf_work,
8054 ieee80211_ml_reconf_work);
8055 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
8056 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
8057 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
8058 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk,
8059 ieee80211_sta_handle_tspec_ac_params_wk);
8060 wiphy_delayed_work_init(&ifmgd->ttlm_work,
8061 ieee80211_tid_to_link_map_work);
8062 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work,
8063 ieee80211_neg_ttlm_timeout_work);
8064 wiphy_work_init(&ifmgd->teardown_ttlm_work,
8065 ieee80211_teardown_ttlm_work);
8066
8067 ifmgd->flags = 0;
8068 ifmgd->powersave = sdata->wdev.ps;
8069 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
8070 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
8071 /* Setup TDLS data */
8072 spin_lock_init(&ifmgd->teardown_lock);
8073 ifmgd->teardown_skb = NULL;
8074 ifmgd->orig_teardown_skb = NULL;
8075 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO;
8076 }
8077
ieee80211_recalc_smps_work(struct wiphy * wiphy,struct wiphy_work * work)8078 static void ieee80211_recalc_smps_work(struct wiphy *wiphy,
8079 struct wiphy_work *work)
8080 {
8081 struct ieee80211_link_data *link =
8082 container_of(work, struct ieee80211_link_data,
8083 u.mgd.recalc_smps);
8084
8085 ieee80211_recalc_smps(link->sdata, link);
8086 }
8087
ieee80211_mgd_setup_link(struct ieee80211_link_data * link)8088 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link)
8089 {
8090 struct ieee80211_sub_if_data *sdata = link->sdata;
8091 struct ieee80211_local *local = sdata->local;
8092 unsigned int link_id = link->link_id;
8093
8094 link->u.mgd.p2p_noa_index = -1;
8095 link->conf->bssid = link->u.mgd.bssid;
8096 link->smps_mode = IEEE80211_SMPS_OFF;
8097
8098 wiphy_work_init(&link->u.mgd.request_smps_work,
8099 ieee80211_request_smps_mgd_work);
8100 wiphy_work_init(&link->u.mgd.recalc_smps,
8101 ieee80211_recalc_smps_work);
8102 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
8103 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC;
8104 else
8105 link->u.mgd.req_smps = IEEE80211_SMPS_OFF;
8106
8107 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work,
8108 ieee80211_csa_switch_work);
8109
8110 ieee80211_clear_tpe(&link->conf->tpe);
8111
8112 if (sdata->u.mgd.assoc_data)
8113 ether_addr_copy(link->conf->addr,
8114 sdata->u.mgd.assoc_data->link[link_id].addr);
8115 else if (!is_valid_ether_addr(link->conf->addr))
8116 eth_random_addr(link->conf->addr);
8117 }
8118
8119 /* scan finished notification */
ieee80211_mlme_notify_scan_completed(struct ieee80211_local * local)8120 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
8121 {
8122 struct ieee80211_sub_if_data *sdata;
8123
8124 /* Restart STA timers */
8125 rcu_read_lock();
8126 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
8127 if (ieee80211_sdata_running(sdata))
8128 ieee80211_restart_sta_timer(sdata);
8129 }
8130 rcu_read_unlock();
8131 }
8132
ieee80211_prep_connection(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * cbss,s8 link_id,const u8 * ap_mld_addr,bool assoc,struct ieee80211_conn_settings * conn,bool override)8133 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
8134 struct cfg80211_bss *cbss, s8 link_id,
8135 const u8 *ap_mld_addr, bool assoc,
8136 struct ieee80211_conn_settings *conn,
8137 bool override)
8138 {
8139 struct ieee80211_local *local = sdata->local;
8140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8141 struct ieee80211_bss *bss = (void *)cbss->priv;
8142 struct sta_info *new_sta = NULL;
8143 struct ieee80211_link_data *link;
8144 bool have_sta = false;
8145 bool mlo;
8146 int err;
8147
8148 if (link_id >= 0) {
8149 mlo = true;
8150 if (WARN_ON(!ap_mld_addr))
8151 return -EINVAL;
8152 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0);
8153 } else {
8154 if (WARN_ON(ap_mld_addr))
8155 return -EINVAL;
8156 ap_mld_addr = cbss->bssid;
8157 err = ieee80211_vif_set_links(sdata, 0, 0);
8158 link_id = 0;
8159 mlo = false;
8160 }
8161
8162 if (err)
8163 return err;
8164
8165 link = sdata_dereference(sdata->link[link_id], sdata);
8166 if (WARN_ON(!link)) {
8167 err = -ENOLINK;
8168 goto out_err;
8169 }
8170
8171 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) {
8172 err = -EINVAL;
8173 goto out_err;
8174 }
8175
8176 /* If a reconfig is happening, bail out */
8177 if (local->in_reconfig) {
8178 err = -EBUSY;
8179 goto out_err;
8180 }
8181
8182 if (assoc) {
8183 rcu_read_lock();
8184 have_sta = sta_info_get(sdata, ap_mld_addr);
8185 rcu_read_unlock();
8186 }
8187
8188 if (!have_sta) {
8189 if (mlo)
8190 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr,
8191 link_id, cbss->bssid,
8192 GFP_KERNEL);
8193 else
8194 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL);
8195
8196 if (!new_sta) {
8197 err = -ENOMEM;
8198 goto out_err;
8199 }
8200
8201 new_sta->sta.mlo = mlo;
8202 }
8203
8204 /*
8205 * Set up the information for the new channel before setting the
8206 * new channel. We can't - completely race-free - change the basic
8207 * rates bitmap and the channel (sband) that it refers to, but if
8208 * we set it up before we at least avoid calling into the driver's
8209 * bss_info_changed() method with invalid information (since we do
8210 * call that from changing the channel - only for IDLE and perhaps
8211 * some others, but ...).
8212 *
8213 * So to avoid that, just set up all the new information before the
8214 * channel, but tell the driver to apply it only afterwards, since
8215 * it might need the new channel for that.
8216 */
8217 if (new_sta) {
8218 const struct cfg80211_bss_ies *ies;
8219 struct link_sta_info *link_sta;
8220
8221 rcu_read_lock();
8222 link_sta = rcu_dereference(new_sta->link[link_id]);
8223 if (WARN_ON(!link_sta)) {
8224 rcu_read_unlock();
8225 sta_info_free(local, new_sta);
8226 err = -EINVAL;
8227 goto out_err;
8228 }
8229
8230 err = ieee80211_mgd_setup_link_sta(link, new_sta,
8231 link_sta, cbss);
8232 if (err) {
8233 rcu_read_unlock();
8234 sta_info_free(local, new_sta);
8235 goto out_err;
8236 }
8237
8238 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN);
8239
8240 /* set timing information */
8241 link->conf->beacon_int = cbss->beacon_interval;
8242 ies = rcu_dereference(cbss->beacon_ies);
8243 if (ies) {
8244 link->conf->sync_tsf = ies->tsf;
8245 link->conf->sync_device_ts =
8246 bss->device_ts_beacon;
8247
8248 ieee80211_get_dtim(ies,
8249 &link->conf->sync_dtim_count,
8250 NULL);
8251 } else if (!ieee80211_hw_check(&sdata->local->hw,
8252 TIMING_BEACON_ONLY)) {
8253 ies = rcu_dereference(cbss->proberesp_ies);
8254 /* must be non-NULL since beacon IEs were NULL */
8255 link->conf->sync_tsf = ies->tsf;
8256 link->conf->sync_device_ts =
8257 bss->device_ts_presp;
8258 link->conf->sync_dtim_count = 0;
8259 } else {
8260 link->conf->sync_tsf = 0;
8261 link->conf->sync_device_ts = 0;
8262 link->conf->sync_dtim_count = 0;
8263 }
8264 rcu_read_unlock();
8265 }
8266
8267 if (new_sta || override) {
8268 /*
8269 * Only set this if we're also going to calculate the AP
8270 * settings etc., otherwise this was set before in a
8271 * previous call. Note override is set to %true in assoc
8272 * if the settings were changed.
8273 */
8274 link->u.mgd.conn = *conn;
8275 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss,
8276 mlo, &link->u.mgd.conn);
8277 if (err) {
8278 if (new_sta)
8279 sta_info_free(local, new_sta);
8280 goto out_err;
8281 }
8282 /* pass out for use in assoc */
8283 *conn = link->u.mgd.conn;
8284 }
8285
8286 if (new_sta) {
8287 /*
8288 * tell driver about BSSID, basic rates and timing
8289 * this was set up above, before setting the channel
8290 */
8291 ieee80211_link_info_change_notify(sdata, link,
8292 BSS_CHANGED_BSSID |
8293 BSS_CHANGED_BASIC_RATES |
8294 BSS_CHANGED_BEACON_INT);
8295
8296 if (assoc)
8297 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
8298
8299 err = sta_info_insert(new_sta);
8300 new_sta = NULL;
8301 if (err) {
8302 sdata_info(sdata,
8303 "failed to insert STA entry for the AP (error %d)\n",
8304 err);
8305 goto out_release_chan;
8306 }
8307 } else
8308 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid));
8309
8310 /* Cancel scan to ensure that nothing interferes with connection */
8311 if (local->scanning)
8312 ieee80211_scan_cancel(local);
8313
8314 return 0;
8315
8316 out_release_chan:
8317 ieee80211_link_release_channel(link);
8318 out_err:
8319 ieee80211_vif_set_links(sdata, 0, 0);
8320 return err;
8321 }
8322
ieee80211_mgd_csa_present(struct ieee80211_sub_if_data * sdata,const struct cfg80211_bss_ies * ies,u8 cur_channel,bool ignore_ecsa)8323 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata,
8324 const struct cfg80211_bss_ies *ies,
8325 u8 cur_channel, bool ignore_ecsa)
8326 {
8327 const struct element *csa_elem, *ecsa_elem;
8328 struct ieee80211_channel_sw_ie *csa = NULL;
8329 struct ieee80211_ext_chansw_ie *ecsa = NULL;
8330
8331 if (!ies)
8332 return false;
8333
8334 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH,
8335 ies->data, ies->len);
8336 if (csa_elem && csa_elem->datalen == sizeof(*csa))
8337 csa = (void *)csa_elem->data;
8338
8339 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN,
8340 ies->data, ies->len);
8341 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa))
8342 ecsa = (void *)ecsa_elem->data;
8343
8344 if (csa && csa->count == 0)
8345 csa = NULL;
8346 if (csa && !csa->mode && csa->new_ch_num == cur_channel)
8347 csa = NULL;
8348
8349 if (ecsa && ecsa->count == 0)
8350 ecsa = NULL;
8351 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel)
8352 ecsa = NULL;
8353
8354 if (ignore_ecsa && ecsa) {
8355 sdata_info(sdata,
8356 "Ignoring ECSA in probe response - was considered stuck!\n");
8357 return csa;
8358 }
8359
8360 return csa || ecsa;
8361 }
8362
ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data * sdata,struct cfg80211_bss * bss)8363 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata,
8364 struct cfg80211_bss *bss)
8365 {
8366 u8 cur_channel;
8367 bool ret;
8368
8369 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq);
8370
8371 rcu_read_lock();
8372 if (ieee80211_mgd_csa_present(sdata,
8373 rcu_dereference(bss->beacon_ies),
8374 cur_channel, false)) {
8375 ret = true;
8376 goto out;
8377 }
8378
8379 if (ieee80211_mgd_csa_present(sdata,
8380 rcu_dereference(bss->proberesp_ies),
8381 cur_channel, bss->proberesp_ecsa_stuck)) {
8382 ret = true;
8383 goto out;
8384 }
8385
8386 ret = false;
8387 out:
8388 rcu_read_unlock();
8389 return ret;
8390 }
8391
8392 /* config hooks */
ieee80211_mgd_auth(struct ieee80211_sub_if_data * sdata,struct cfg80211_auth_request * req)8393 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
8394 struct cfg80211_auth_request *req)
8395 {
8396 struct ieee80211_local *local = sdata->local;
8397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8398 struct ieee80211_mgd_auth_data *auth_data;
8399 struct ieee80211_conn_settings conn;
8400 struct ieee80211_link_data *link;
8401 struct ieee80211_supported_band *sband;
8402 struct ieee80211_bss *bss;
8403 u16 auth_alg;
8404 int err;
8405 bool cont_auth, wmm_used;
8406
8407 lockdep_assert_wiphy(sdata->local->hw.wiphy);
8408
8409 /* prepare auth data structure */
8410
8411 switch (req->auth_type) {
8412 case NL80211_AUTHTYPE_OPEN_SYSTEM:
8413 auth_alg = WLAN_AUTH_OPEN;
8414 break;
8415 case NL80211_AUTHTYPE_SHARED_KEY:
8416 if (fips_enabled)
8417 return -EOPNOTSUPP;
8418 auth_alg = WLAN_AUTH_SHARED_KEY;
8419 break;
8420 case NL80211_AUTHTYPE_FT:
8421 auth_alg = WLAN_AUTH_FT;
8422 break;
8423 case NL80211_AUTHTYPE_NETWORK_EAP:
8424 auth_alg = WLAN_AUTH_LEAP;
8425 break;
8426 case NL80211_AUTHTYPE_SAE:
8427 auth_alg = WLAN_AUTH_SAE;
8428 break;
8429 case NL80211_AUTHTYPE_FILS_SK:
8430 auth_alg = WLAN_AUTH_FILS_SK;
8431 break;
8432 case NL80211_AUTHTYPE_FILS_SK_PFS:
8433 auth_alg = WLAN_AUTH_FILS_SK_PFS;
8434 break;
8435 case NL80211_AUTHTYPE_FILS_PK:
8436 auth_alg = WLAN_AUTH_FILS_PK;
8437 break;
8438 default:
8439 return -EOPNOTSUPP;
8440 }
8441
8442 if (ifmgd->assoc_data)
8443 return -EBUSY;
8444
8445 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) {
8446 sdata_info(sdata, "AP is in CSA process, reject auth\n");
8447 return -EINVAL;
8448 }
8449
8450 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
8451 req->ie_len, GFP_KERNEL);
8452 if (!auth_data)
8453 return -ENOMEM;
8454
8455 memcpy(auth_data->ap_addr,
8456 req->ap_mld_addr ?: req->bss->bssid,
8457 ETH_ALEN);
8458 auth_data->bss = req->bss;
8459 auth_data->link_id = req->link_id;
8460
8461 if (req->auth_data_len >= 4) {
8462 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
8463 __le16 *pos = (__le16 *) req->auth_data;
8464
8465 auth_data->sae_trans = le16_to_cpu(pos[0]);
8466 auth_data->sae_status = le16_to_cpu(pos[1]);
8467 }
8468 memcpy(auth_data->data, req->auth_data + 4,
8469 req->auth_data_len - 4);
8470 auth_data->data_len += req->auth_data_len - 4;
8471 }
8472
8473 /* Check if continuing authentication or trying to authenticate with the
8474 * same BSS that we were in the process of authenticating with and avoid
8475 * removal and re-addition of the STA entry in
8476 * ieee80211_prep_connection().
8477 */
8478 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss &&
8479 ifmgd->auth_data->link_id == req->link_id;
8480
8481 if (req->ie && req->ie_len) {
8482 memcpy(&auth_data->data[auth_data->data_len],
8483 req->ie, req->ie_len);
8484 auth_data->data_len += req->ie_len;
8485 }
8486
8487 if (req->key && req->key_len) {
8488 auth_data->key_len = req->key_len;
8489 auth_data->key_idx = req->key_idx;
8490 memcpy(auth_data->key, req->key, req->key_len);
8491 }
8492
8493 auth_data->algorithm = auth_alg;
8494
8495 /* try to authenticate/probe */
8496
8497 if (ifmgd->auth_data) {
8498 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
8499 auth_data->peer_confirmed =
8500 ifmgd->auth_data->peer_confirmed;
8501 }
8502 ieee80211_destroy_auth_data(sdata, cont_auth);
8503 }
8504
8505 /* prep auth_data so we don't go into idle on disassoc */
8506 ifmgd->auth_data = auth_data;
8507
8508 /* If this is continuation of an ongoing SAE authentication exchange
8509 * (i.e., request to send SAE Confirm) and the peer has already
8510 * confirmed, mark authentication completed since we are about to send
8511 * out SAE Confirm.
8512 */
8513 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
8514 auth_data->peer_confirmed && auth_data->sae_trans == 2)
8515 ieee80211_mark_sta_auth(sdata);
8516
8517 if (ifmgd->associated) {
8518 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8519
8520 sdata_info(sdata,
8521 "disconnect from AP %pM for new auth to %pM\n",
8522 sdata->vif.cfg.ap_addr, auth_data->ap_addr);
8523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
8524 WLAN_REASON_UNSPECIFIED,
8525 false, frame_buf);
8526
8527 ieee80211_report_disconnect(sdata, frame_buf,
8528 sizeof(frame_buf), true,
8529 WLAN_REASON_UNSPECIFIED,
8530 false);
8531 }
8532
8533 /* needed for transmitting the auth frame(s) properly */
8534 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN);
8535
8536 bss = (void *)req->bss->priv;
8537 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS);
8538
8539 sband = local->hw.wiphy->bands[req->bss->channel->band];
8540
8541 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used,
8542 &conn);
8543
8544 err = ieee80211_prep_connection(sdata, req->bss, req->link_id,
8545 req->ap_mld_addr, cont_auth,
8546 &conn, false);
8547 if (err)
8548 goto err_clear;
8549
8550 if (req->link_id >= 0)
8551 link = sdata_dereference(sdata->link[req->link_id], sdata);
8552 else
8553 link = &sdata->deflink;
8554
8555 if (WARN_ON(!link)) {
8556 err = -ENOLINK;
8557 goto err_clear;
8558 }
8559
8560 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n",
8561 auth_data->ap_addr, link->conf->addr);
8562
8563 err = ieee80211_auth(sdata);
8564 if (err) {
8565 sta_info_destroy_addr(sdata, auth_data->ap_addr);
8566 goto err_clear;
8567 }
8568
8569 /* hold our own reference */
8570 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8571 return 0;
8572
8573 err_clear:
8574 if (!ieee80211_vif_is_mld(&sdata->vif)) {
8575 eth_zero_addr(sdata->deflink.u.mgd.bssid);
8576 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
8577 BSS_CHANGED_BSSID);
8578 ieee80211_link_release_channel(&sdata->deflink);
8579 }
8580 ifmgd->auth_data = NULL;
8581 kfree(auth_data);
8582 return err;
8583 }
8584
8585 static void
ieee80211_setup_assoc_link(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,struct cfg80211_assoc_request * req,struct ieee80211_conn_settings * conn,unsigned int link_id)8586 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata,
8587 struct ieee80211_mgd_assoc_data *assoc_data,
8588 struct cfg80211_assoc_request *req,
8589 struct ieee80211_conn_settings *conn,
8590 unsigned int link_id)
8591 {
8592 struct ieee80211_local *local = sdata->local;
8593 const struct cfg80211_bss_ies *bss_ies;
8594 struct ieee80211_supported_band *sband;
8595 struct ieee80211_link_data *link;
8596 struct cfg80211_bss *cbss;
8597 struct ieee80211_bss *bss;
8598
8599 cbss = assoc_data->link[link_id].bss;
8600 if (WARN_ON(!cbss))
8601 return;
8602
8603 bss = (void *)cbss->priv;
8604
8605 sband = local->hw.wiphy->bands[cbss->channel->band];
8606 if (WARN_ON(!sband))
8607 return;
8608
8609 link = sdata_dereference(sdata->link[link_id], sdata);
8610 if (WARN_ON(!link))
8611 return;
8612
8613 /* for MLO connections assume advertising all rates is OK */
8614 if (!req->ap_mld_addr) {
8615 assoc_data->supp_rates = bss->supp_rates;
8616 assoc_data->supp_rates_len = bss->supp_rates_len;
8617 }
8618
8619 /* copy and link elems for the STA profile */
8620 if (req->links[link_id].elems_len) {
8621 memcpy(assoc_data->ie_pos, req->links[link_id].elems,
8622 req->links[link_id].elems_len);
8623 assoc_data->link[link_id].elems = assoc_data->ie_pos;
8624 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len;
8625 assoc_data->ie_pos += req->links[link_id].elems_len;
8626 }
8627
8628 link->u.mgd.beacon_crc_valid = false;
8629 link->u.mgd.dtim_period = 0;
8630 link->u.mgd.have_beacon = false;
8631
8632 /* override HT configuration only if the AP and we support it */
8633 if (conn->mode >= IEEE80211_CONN_MODE_HT) {
8634 struct ieee80211_sta_ht_cap sta_ht_cap;
8635
8636 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
8637 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
8638 }
8639
8640 rcu_read_lock();
8641 bss_ies = rcu_dereference(cbss->beacon_ies);
8642 if (bss_ies) {
8643 u8 dtim_count = 0;
8644
8645 ieee80211_get_dtim(bss_ies, &dtim_count,
8646 &link->u.mgd.dtim_period);
8647
8648 sdata->deflink.u.mgd.have_beacon = true;
8649
8650 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
8651 link->conf->sync_tsf = bss_ies->tsf;
8652 link->conf->sync_device_ts = bss->device_ts_beacon;
8653 link->conf->sync_dtim_count = dtim_count;
8654 }
8655 } else {
8656 bss_ies = rcu_dereference(cbss->ies);
8657 }
8658
8659 if (bss_ies) {
8660 const struct element *elem;
8661
8662 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION,
8663 bss_ies->data, bss_ies->len);
8664 if (elem && elem->datalen >= 3)
8665 link->conf->profile_periodicity = elem->data[2];
8666 else
8667 link->conf->profile_periodicity = 0;
8668
8669 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,
8670 bss_ies->data, bss_ies->len);
8671 if (elem && elem->datalen >= 11 &&
8672 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT))
8673 link->conf->ema_ap = true;
8674 else
8675 link->conf->ema_ap = false;
8676 }
8677 rcu_read_unlock();
8678
8679 if (bss->corrupt_data) {
8680 char *corrupt_type = "data";
8681
8682 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
8683 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
8684 corrupt_type = "beacon and probe response";
8685 else
8686 corrupt_type = "beacon";
8687 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) {
8688 corrupt_type = "probe response";
8689 }
8690 sdata_info(sdata, "associating to AP %pM with corrupt %s\n",
8691 cbss->bssid, corrupt_type);
8692 }
8693
8694 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) {
8695 if (sdata->u.mgd.powersave)
8696 link->smps_mode = IEEE80211_SMPS_DYNAMIC;
8697 else
8698 link->smps_mode = IEEE80211_SMPS_OFF;
8699 } else {
8700 link->smps_mode = link->u.mgd.req_smps;
8701 }
8702 }
8703
8704 static int
ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgd_assoc_data * assoc_data,int link_id)8705 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata,
8706 struct ieee80211_mgd_assoc_data *assoc_data,
8707 int link_id)
8708 {
8709 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
8710 enum nl80211_band band = cbss->channel->band;
8711 struct ieee80211_supported_band *sband;
8712 const struct element *elem;
8713 int err;
8714
8715 /* neither HT nor VHT elements used on 6 GHz */
8716 if (band == NL80211_BAND_6GHZ)
8717 return 0;
8718
8719 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT)
8720 return 0;
8721
8722 rcu_read_lock();
8723 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION);
8724 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) {
8725 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n",
8726 cbss->bssid);
8727 err = -EINVAL;
8728 goto out_rcu;
8729 }
8730 assoc_data->link[link_id].ap_ht_param =
8731 ((struct ieee80211_ht_operation *)(elem->data))->ht_param;
8732 rcu_read_unlock();
8733
8734 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT)
8735 return 0;
8736
8737 /* some drivers want to support VHT on 2.4 GHz even */
8738 sband = sdata->local->hw.wiphy->bands[band];
8739 if (!sband->vht_cap.vht_supported)
8740 return 0;
8741
8742 rcu_read_lock();
8743 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY);
8744 /* but even then accept it not being present on the AP */
8745 if (!elem && band == NL80211_BAND_2GHZ) {
8746 err = 0;
8747 goto out_rcu;
8748 }
8749 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) {
8750 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n",
8751 cbss->bssid);
8752 err = -EINVAL;
8753 goto out_rcu;
8754 }
8755 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data,
8756 sizeof(struct ieee80211_vht_cap));
8757 rcu_read_unlock();
8758
8759 return 0;
8760 out_rcu:
8761 rcu_read_unlock();
8762 return err;
8763 }
8764
ieee80211_mgd_assoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_assoc_request * req)8765 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
8766 struct cfg80211_assoc_request *req)
8767 {
8768 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id;
8769 struct ieee80211_local *local = sdata->local;
8770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
8771 struct ieee80211_mgd_assoc_data *assoc_data;
8772 const struct element *ssid_elem;
8773 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
8774 struct ieee80211_link_data *link;
8775 struct cfg80211_bss *cbss;
8776 bool override, uapsd_supported;
8777 bool match_auth;
8778 int i, err;
8779 size_t size = sizeof(*assoc_data) + req->ie_len;
8780
8781 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
8782 size += req->links[i].elems_len;
8783
8784 /* FIXME: no support for 4-addr MLO yet */
8785 if (sdata->u.mgd.use_4addr && req->link_id >= 0)
8786 return -EOPNOTSUPP;
8787
8788 assoc_data = kzalloc(size, GFP_KERNEL);
8789 if (!assoc_data)
8790 return -ENOMEM;
8791
8792 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss;
8793
8794 if (ieee80211_mgd_csa_in_process(sdata, cbss)) {
8795 sdata_info(sdata, "AP is in CSA process, reject assoc\n");
8796 err = -EINVAL;
8797 goto err_free;
8798 }
8799
8800 rcu_read_lock();
8801 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID);
8802 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) {
8803 rcu_read_unlock();
8804 err = -EINVAL;
8805 goto err_free;
8806 }
8807
8808 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen);
8809 assoc_data->ssid_len = ssid_elem->datalen;
8810 rcu_read_unlock();
8811
8812 if (req->ap_mld_addr)
8813 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN);
8814 else
8815 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN);
8816
8817 if (ifmgd->associated) {
8818 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
8819
8820 sdata_info(sdata,
8821 "disconnect from AP %pM for new assoc to %pM\n",
8822 sdata->vif.cfg.ap_addr, assoc_data->ap_addr);
8823 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
8824 WLAN_REASON_UNSPECIFIED,
8825 false, frame_buf);
8826
8827 ieee80211_report_disconnect(sdata, frame_buf,
8828 sizeof(frame_buf), true,
8829 WLAN_REASON_UNSPECIFIED,
8830 false);
8831 }
8832
8833 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
8834 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
8835 sizeof(ifmgd->ht_capa_mask));
8836
8837 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
8838 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
8839 sizeof(ifmgd->vht_capa_mask));
8840
8841 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
8842 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
8843 sizeof(ifmgd->s1g_capa_mask));
8844
8845 /* keep some setup (AP STA, channel, ...) if matching */
8846 match_auth = ifmgd->auth_data &&
8847 ether_addr_equal(ifmgd->auth_data->ap_addr,
8848 assoc_data->ap_addr) &&
8849 ifmgd->auth_data->link_id == req->link_id;
8850
8851 if (req->ap_mld_addr) {
8852 uapsd_supported = true;
8853
8854 if (req->flags & (ASSOC_REQ_DISABLE_HT |
8855 ASSOC_REQ_DISABLE_VHT |
8856 ASSOC_REQ_DISABLE_HE |
8857 ASSOC_REQ_DISABLE_EHT)) {
8858 err = -EINVAL;
8859 goto err_free;
8860 }
8861
8862 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
8863 struct ieee80211_supported_band *sband;
8864 struct cfg80211_bss *link_cbss = req->links[i].bss;
8865 struct ieee80211_bss *bss;
8866
8867 if (!link_cbss)
8868 continue;
8869
8870 bss = (void *)link_cbss->priv;
8871
8872 if (!bss->wmm_used) {
8873 err = -EINVAL;
8874 req->links[i].error = err;
8875 goto err_free;
8876 }
8877
8878 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) {
8879 err = -EINVAL;
8880 req->links[i].error = err;
8881 goto err_free;
8882 }
8883
8884 link = sdata_dereference(sdata->link[i], sdata);
8885 if (link)
8886 ether_addr_copy(assoc_data->link[i].addr,
8887 link->conf->addr);
8888 else
8889 eth_random_addr(assoc_data->link[i].addr);
8890 sband = local->hw.wiphy->bands[link_cbss->channel->band];
8891
8892 if (match_auth && i == assoc_link_id && link)
8893 assoc_data->link[i].conn = link->u.mgd.conn;
8894 else
8895 assoc_data->link[i].conn =
8896 ieee80211_conn_settings_unlimited;
8897 ieee80211_determine_our_sta_mode_assoc(sdata, sband,
8898 req, true, i,
8899 &assoc_data->link[i].conn);
8900 assoc_data->link[i].bss = link_cbss;
8901 assoc_data->link[i].disabled = req->links[i].disabled;
8902
8903 if (!bss->uapsd_supported)
8904 uapsd_supported = false;
8905
8906 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) {
8907 err = -EINVAL;
8908 req->links[i].error = err;
8909 goto err_free;
8910 }
8911
8912 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata,
8913 assoc_data, i);
8914 if (err) {
8915 err = -EINVAL;
8916 req->links[i].error = err;
8917 goto err_free;
8918 }
8919 }
8920
8921 assoc_data->wmm = true;
8922 } else {
8923 struct ieee80211_supported_band *sband;
8924 struct ieee80211_bss *bss = (void *)cbss->priv;
8925
8926 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN);
8927 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ;
8928
8929 assoc_data->wmm = bss->wmm_used &&
8930 (local->hw.queues >= IEEE80211_NUM_ACS);
8931
8932 if (cbss->channel->band == NL80211_BAND_6GHZ &&
8933 req->flags & (ASSOC_REQ_DISABLE_HT |
8934 ASSOC_REQ_DISABLE_VHT |
8935 ASSOC_REQ_DISABLE_HE)) {
8936 err = -EINVAL;
8937 goto err_free;
8938 }
8939
8940 sband = local->hw.wiphy->bands[cbss->channel->band];
8941
8942 assoc_data->link[0].bss = cbss;
8943
8944 if (match_auth)
8945 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn;
8946 else
8947 assoc_data->link[0].conn =
8948 ieee80211_conn_settings_unlimited;
8949 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req,
8950 assoc_data->wmm, 0,
8951 &assoc_data->link[0].conn);
8952
8953 uapsd_supported = bss->uapsd_supported;
8954
8955 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0);
8956 if (err)
8957 goto err_free;
8958 }
8959
8960 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU;
8961
8962 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
8963 err = -EBUSY;
8964 goto err_free;
8965 }
8966
8967 if (ifmgd->assoc_data) {
8968 err = -EBUSY;
8969 goto err_free;
8970 }
8971
8972 /* Cleanup is delayed if auth_data matches */
8973 if (ifmgd->auth_data && !match_auth)
8974 ieee80211_destroy_auth_data(sdata, false);
8975
8976 if (req->ie && req->ie_len) {
8977 memcpy(assoc_data->ie, req->ie, req->ie_len);
8978 assoc_data->ie_len = req->ie_len;
8979 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len;
8980 } else {
8981 assoc_data->ie_pos = assoc_data->ie;
8982 }
8983
8984 if (req->fils_kek) {
8985 /* should already be checked in cfg80211 - so warn */
8986 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
8987 err = -EINVAL;
8988 goto err_free;
8989 }
8990 memcpy(assoc_data->fils_kek, req->fils_kek,
8991 req->fils_kek_len);
8992 assoc_data->fils_kek_len = req->fils_kek_len;
8993 }
8994
8995 if (req->fils_nonces)
8996 memcpy(assoc_data->fils_nonces, req->fils_nonces,
8997 2 * FILS_NONCE_LEN);
8998
8999 /* default timeout */
9000 assoc_data->timeout = jiffies;
9001 assoc_data->timeout_started = true;
9002
9003 assoc_data->assoc_link_id = assoc_link_id;
9004
9005 if (req->ap_mld_addr) {
9006 /* if there was no authentication, set up the link */
9007 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0);
9008 if (err)
9009 goto err_clear;
9010 }
9011
9012 link = sdata_dereference(sdata->link[assoc_link_id], sdata);
9013 if (WARN_ON(!link)) {
9014 err = -EINVAL;
9015 goto err_clear;
9016 }
9017
9018 override = link->u.mgd.conn.mode !=
9019 assoc_data->link[assoc_link_id].conn.mode ||
9020 link->u.mgd.conn.bw_limit !=
9021 assoc_data->link[assoc_link_id].conn.bw_limit;
9022 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn;
9023
9024 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn,
9025 assoc_link_id);
9026
9027 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
9028 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
9029 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
9030 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
9031
9032 if (assoc_data->wmm && uapsd_supported &&
9033 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
9034 assoc_data->uapsd = true;
9035 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
9036 } else {
9037 assoc_data->uapsd = false;
9038 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
9039 }
9040
9041 if (req->prev_bssid)
9042 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN);
9043
9044 if (req->use_mfp) {
9045 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
9046 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
9047 } else {
9048 ifmgd->mfp = IEEE80211_MFP_DISABLED;
9049 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
9050 }
9051
9052 if (req->flags & ASSOC_REQ_USE_RRM)
9053 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
9054 else
9055 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
9056
9057 if (req->crypto.control_port)
9058 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
9059 else
9060 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
9061
9062 sdata->control_port_protocol = req->crypto.control_port_ethertype;
9063 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
9064 sdata->control_port_over_nl80211 =
9065 req->crypto.control_port_over_nl80211;
9066 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth;
9067
9068 /* kick off associate process */
9069 ifmgd->assoc_data = assoc_data;
9070
9071 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) {
9072 if (!assoc_data->link[i].bss)
9073 continue;
9074 if (i == assoc_data->assoc_link_id)
9075 continue;
9076 /* only calculate the mode, hence link == NULL */
9077 err = ieee80211_prep_channel(sdata, NULL, i,
9078 assoc_data->link[i].bss, true,
9079 &assoc_data->link[i].conn);
9080 if (err) {
9081 req->links[i].error = err;
9082 goto err_clear;
9083 }
9084 }
9085
9086 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len);
9087 vif_cfg->ssid_len = assoc_data->ssid_len;
9088
9089 /* needed for transmitting the assoc frames properly */
9090 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN);
9091
9092 err = ieee80211_prep_connection(sdata, cbss, req->link_id,
9093 req->ap_mld_addr, true,
9094 &assoc_data->link[assoc_link_id].conn,
9095 override);
9096 if (err)
9097 goto err_clear;
9098
9099 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) {
9100 const struct cfg80211_bss_ies *beacon_ies;
9101
9102 rcu_read_lock();
9103 beacon_ies = rcu_dereference(req->bss->beacon_ies);
9104 if (!beacon_ies) {
9105 /*
9106 * Wait up to one beacon interval ...
9107 * should this be more if we miss one?
9108 */
9109 sdata_info(sdata, "waiting for beacon from %pM\n",
9110 link->u.mgd.bssid);
9111 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
9112 assoc_data->timeout_started = true;
9113 assoc_data->need_beacon = true;
9114 }
9115 rcu_read_unlock();
9116 }
9117
9118 run_again(sdata, assoc_data->timeout);
9119
9120 /* We are associating, clean up auth_data */
9121 if (ifmgd->auth_data)
9122 ieee80211_destroy_auth_data(sdata, true);
9123
9124 return 0;
9125 err_clear:
9126 if (!ifmgd->auth_data) {
9127 eth_zero_addr(sdata->deflink.u.mgd.bssid);
9128 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
9129 BSS_CHANGED_BSSID);
9130 }
9131 ifmgd->assoc_data = NULL;
9132 err_free:
9133 kfree(assoc_data);
9134 return err;
9135 }
9136
ieee80211_mgd_deauth(struct ieee80211_sub_if_data * sdata,struct cfg80211_deauth_request * req)9137 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
9138 struct cfg80211_deauth_request *req)
9139 {
9140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9141 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9142 bool tx = !req->local_state_change;
9143 struct ieee80211_prep_tx_info info = {
9144 .subtype = IEEE80211_STYPE_DEAUTH,
9145 };
9146
9147 if (ifmgd->auth_data &&
9148 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) {
9149 sdata_info(sdata,
9150 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
9151 req->bssid, req->reason_code,
9152 ieee80211_get_reason_code_string(req->reason_code));
9153
9154 info.link_id = ifmgd->auth_data->link_id;
9155 drv_mgd_prepare_tx(sdata->local, sdata, &info);
9156 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
9157 IEEE80211_STYPE_DEAUTH,
9158 req->reason_code, tx,
9159 frame_buf);
9160 ieee80211_destroy_auth_data(sdata, false);
9161 ieee80211_report_disconnect(sdata, frame_buf,
9162 sizeof(frame_buf), true,
9163 req->reason_code, false);
9164 drv_mgd_complete_tx(sdata->local, sdata, &info);
9165 return 0;
9166 }
9167
9168 if (ifmgd->assoc_data &&
9169 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) {
9170 sdata_info(sdata,
9171 "aborting association with %pM by local choice (Reason: %u=%s)\n",
9172 req->bssid, req->reason_code,
9173 ieee80211_get_reason_code_string(req->reason_code));
9174
9175 info.link_id = ifmgd->assoc_data->assoc_link_id;
9176 drv_mgd_prepare_tx(sdata->local, sdata, &info);
9177 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid,
9178 IEEE80211_STYPE_DEAUTH,
9179 req->reason_code, tx,
9180 frame_buf);
9181 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON);
9182 ieee80211_report_disconnect(sdata, frame_buf,
9183 sizeof(frame_buf), true,
9184 req->reason_code, false);
9185 drv_mgd_complete_tx(sdata->local, sdata, &info);
9186 return 0;
9187 }
9188
9189 if (ifmgd->associated &&
9190 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) {
9191 sdata_info(sdata,
9192 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
9193 req->bssid, req->reason_code,
9194 ieee80211_get_reason_code_string(req->reason_code));
9195
9196 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
9197 req->reason_code, tx, frame_buf);
9198 ieee80211_report_disconnect(sdata, frame_buf,
9199 sizeof(frame_buf), true,
9200 req->reason_code, false);
9201 drv_mgd_complete_tx(sdata->local, sdata, &info);
9202 return 0;
9203 }
9204
9205 return -ENOTCONN;
9206 }
9207
ieee80211_mgd_disassoc(struct ieee80211_sub_if_data * sdata,struct cfg80211_disassoc_request * req)9208 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
9209 struct cfg80211_disassoc_request *req)
9210 {
9211 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9212
9213 if (!sdata->u.mgd.associated ||
9214 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN))
9215 return -ENOTCONN;
9216
9217 sdata_info(sdata,
9218 "disassociating from %pM by local choice (Reason: %u=%s)\n",
9219 req->ap_addr, req->reason_code,
9220 ieee80211_get_reason_code_string(req->reason_code));
9221
9222 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
9223 req->reason_code, !req->local_state_change,
9224 frame_buf);
9225
9226 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
9227 req->reason_code, false);
9228
9229 return 0;
9230 }
9231
ieee80211_mgd_stop_link(struct ieee80211_link_data * link)9232 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link)
9233 {
9234 wiphy_work_cancel(link->sdata->local->hw.wiphy,
9235 &link->u.mgd.request_smps_work);
9236 wiphy_work_cancel(link->sdata->local->hw.wiphy,
9237 &link->u.mgd.recalc_smps);
9238 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy,
9239 &link->u.mgd.csa.switch_work);
9240 }
9241
ieee80211_mgd_stop(struct ieee80211_sub_if_data * sdata)9242 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
9243 {
9244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9245
9246 /*
9247 * Make sure some work items will not run after this,
9248 * they will not do anything but might not have been
9249 * cancelled when disconnecting.
9250 */
9251 wiphy_work_cancel(sdata->local->hw.wiphy,
9252 &ifmgd->monitor_work);
9253 wiphy_work_cancel(sdata->local->hw.wiphy,
9254 &ifmgd->beacon_connection_loss_work);
9255 wiphy_work_cancel(sdata->local->hw.wiphy,
9256 &ifmgd->csa_connection_drop_work);
9257 wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
9258 &ifmgd->tdls_peer_del_work);
9259
9260 if (ifmgd->assoc_data)
9261 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT);
9262 if (ifmgd->auth_data)
9263 ieee80211_destroy_auth_data(sdata, false);
9264 spin_lock_bh(&ifmgd->teardown_lock);
9265 if (ifmgd->teardown_skb) {
9266 kfree_skb(ifmgd->teardown_skb);
9267 ifmgd->teardown_skb = NULL;
9268 ifmgd->orig_teardown_skb = NULL;
9269 }
9270 kfree(ifmgd->assoc_req_ies);
9271 ifmgd->assoc_req_ies = NULL;
9272 ifmgd->assoc_req_ies_len = 0;
9273 spin_unlock_bh(&ifmgd->teardown_lock);
9274 del_timer_sync(&ifmgd->timer);
9275 }
9276
ieee80211_cqm_rssi_notify(struct ieee80211_vif * vif,enum nl80211_cqm_rssi_threshold_event rssi_event,s32 rssi_level,gfp_t gfp)9277 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
9278 enum nl80211_cqm_rssi_threshold_event rssi_event,
9279 s32 rssi_level,
9280 gfp_t gfp)
9281 {
9282 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
9283
9284 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
9285
9286 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
9287 }
9288 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
9289
ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif * vif,gfp_t gfp)9290 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
9291 {
9292 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
9293
9294 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
9295
9296 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
9297 }
9298 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
9299
_ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)9300 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
9301 int rssi_min_thold,
9302 int rssi_max_thold)
9303 {
9304 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
9305
9306 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9307 return;
9308
9309 /*
9310 * Scale up threshold values before storing it, as the RSSI averaging
9311 * algorithm uses a scaled up value as well. Change this scaling
9312 * factor if the RSSI averaging algorithm changes.
9313 */
9314 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
9315 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
9316 }
9317
ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)9318 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
9319 int rssi_min_thold,
9320 int rssi_max_thold)
9321 {
9322 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
9323
9324 WARN_ON(rssi_min_thold == rssi_max_thold ||
9325 rssi_min_thold > rssi_max_thold);
9326
9327 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
9328 rssi_max_thold);
9329 }
9330 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
9331
ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)9332 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
9333 {
9334 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
9335
9336 _ieee80211_enable_rssi_reports(sdata, 0, 0);
9337 }
9338 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
9339