1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015-2017 Intel Deutschland GmbH
* Copyright (C) 2018-2024 Intel Corporation
*
* element parsing for mac80211
*/
#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
#include <linux/crc32.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include <kunit/visibility.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
#include "led.h"
#include "wep.h"
static void
ieee80211_parse_extension_element(u32 *crc,
const struct element *elem,
struct ieee802_11_elems *elems,
struct ieee80211_elems_parse_params *params)
{
const void *data = elem->data + 1;
bool calc_crc = false;
u8 len;
if (!elem->datalen)
return;
len = elem->datalen - 1;
switch (elem->data[0]) {
case WLAN_EID_EXT_HE_MU_EDCA:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
calc_crc = true;
if (len >= sizeof(*elems->mu_edca_param_set))
elems->mu_edca_param_set = data;
break;
case WLAN_EID_EXT_HE_CAPABILITY:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
if (ieee80211_he_capa_size_ok(data, len)) {
elems->he_cap = data;
elems->he_cap_len = len;
}
break;
case WLAN_EID_EXT_HE_OPERATION:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
calc_crc = true;
if (len >= sizeof(*elems->he_operation) &&
len >= ieee80211_he_oper_size(data) - 1)
elems->he_operation = data;
break;
case WLAN_EID_EXT_UORA:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
if (len >= 1)
elems->uora_element = data;
break;
case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
if (len == 3)
elems->max_channel_switch_time = data;
break;
case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
if (len >= sizeof(*elems->mbssid_config_ie))
elems->mbssid_config_ie = data;
break;
case WLAN_EID_EXT_HE_SPR:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
if (len >= sizeof(*elems->he_spr) &&
len >= ieee80211_he_spr_size(data))
elems->he_spr = data;
break;
case WLAN_EID_EXT_HE_6GHZ_CAPA:
if (params->mode < IEEE80211_CONN_MODE_HE)
break;
if (len >= sizeof(*elems->he_6ghz_capa))
elems->he_6ghz_capa = data;
break;
case WLAN_EID_EXT_EHT_CAPABILITY:
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
if (ieee80211_eht_capa_size_ok(elems->he_cap,
data, len,
params->from_ap)) {
elems->eht_cap = data;
elems->eht_cap_len = len;
}
break;
case WLAN_EID_EXT_EHT_OPERATION:
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
if (ieee80211_eht_oper_size_ok(data, len))
elems->eht_operation = data;
calc_crc = true;
break;
case WLAN_EID_EXT_EHT_MULTI_LINK:
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
calc_crc = true;
if (ieee80211_mle_size_ok(data, len)) {
const struct ieee80211_multi_link_elem *mle =
(void *)data;
switch (le16_get_bits(mle->control,
IEEE80211_ML_CONTROL_TYPE)) {
case IEEE80211_ML_CONTROL_TYPE_BASIC:
if (elems->ml_basic) {
elems->parse_error |=
IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC;
break;
}
elems->ml_basic_elem = (void *)elem;
elems->ml_basic = data;
elems->ml_basic_len = len;
break;
case IEEE80211_ML_CONTROL_TYPE_RECONF:
elems->ml_reconf_elem = (void *)elem;
elems->ml_reconf = data;
elems->ml_reconf_len = len;
break;
default:
break;
}
}
break;
case WLAN_EID_EXT_BANDWIDTH_INDICATION:
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
if (ieee80211_bandwidth_indication_size_ok(data, len))
elems->bandwidth_indication = data;
calc_crc = true;
break;
case WLAN_EID_EXT_TID_TO_LINK_MAPPING:
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
calc_crc = true;
if (ieee80211_tid_to_link_map_size_ok(data, len) &&
elems->ttlm_num < ARRAY_SIZE(elems->ttlm)) {
elems->ttlm[elems->ttlm_num] = (void *)data;
elems->ttlm_num++;
}
break;
}
if (crc && calc_crc)
*crc = crc32_be(*crc, (void *)elem, elem->datalen + 2);
}
static u32
_ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
struct ieee802_11_elems *elems,
const struct element *check_inherit)
{
const struct element *elem;
bool calc_crc = params->filter != 0;
DECLARE_BITMAP(seen_elems, 256);
u32 crc = params->crc;
bitmap_zero(seen_elems, 256);
for_each_element(elem, params->start, params->len) {
const struct element *subelem;
u8 elem_parse_failed;
u8 id = elem->id;
u8 elen = elem->datalen;
const u8 *pos = elem->data;
if (check_inherit &&
!cfg80211_is_element_inherited(elem,
check_inherit))
continue;
switch (id) {
case WLAN_EID_SSID:
case WLAN_EID_SUPP_RATES:
case WLAN_EID_FH_PARAMS:
case WLAN_EID_DS_PARAMS:
case WLAN_EID_CF_PARAMS:
case WLAN_EID_TIM:
case WLAN_EID_IBSS_PARAMS:
case WLAN_EID_CHALLENGE:
case WLAN_EID_RSN:
case WLAN_EID_ERP_INFO:
case WLAN_EID_EXT_SUPP_RATES:
case WLAN_EID_HT_CAPABILITY:
case WLAN_EID_HT_OPERATION:
case WLAN_EID_VHT_CAPABILITY:
case WLAN_EID_VHT_OPERATION:
case WLAN_EID_MESH_ID:
case WLAN_EID_MESH_CONFIG:
case WLAN_EID_PEER_MGMT:
case WLAN_EID_PREQ:
case WLAN_EID_PREP:
case WLAN_EID_PERR:
case WLAN_EID_RANN:
case WLAN_EID_CHANNEL_SWITCH:
case WLAN_EID_EXT_CHANSWITCH_ANN:
case WLAN_EID_COUNTRY:
case WLAN_EID_PWR_CONSTRAINT:
case WLAN_EID_TIMEOUT_INTERVAL:
case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
case WLAN_EID_CHAN_SWITCH_PARAM:
case WLAN_EID_EXT_CAPABILITY:
case WLAN_EID_CHAN_SWITCH_TIMING:
case WLAN_EID_LINK_ID:
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
case WLAN_EID_RSNX:
case WLAN_EID_S1G_BCN_COMPAT:
case WLAN_EID_S1G_CAPABILITIES:
case WLAN_EID_S1G_OPERATION:
case WLAN_EID_AID_RESPONSE:
case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
/*
* not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
* that if the content gets bigger it might be needed more than once
*/
if (test_bit(id, seen_elems)) {
elems->parse_error |=
IEEE80211_PARSE_ERR_DUP_ELEM;
continue;
}
break;
}
if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
crc = crc32_be(crc, pos - 2, elen + 2);
elem_parse_failed = 0;
switch (id) {
case WLAN_EID_LINK_ID:
if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->lnk_id = (void *)(pos - 2);
break;
case WLAN_EID_CHAN_SWITCH_TIMING:
if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->ch_sw_timing = (void *)pos;
break;
case WLAN_EID_EXT_CAPABILITY:
elems->ext_capab = pos;
elems->ext_capab_len = elen;
break;
case WLAN_EID_SSID:
elems->ssid = pos;
elems->ssid_len = elen;
break;
case WLAN_EID_SUPP_RATES:
elems->supp_rates = pos;
elems->supp_rates_len = elen;
break;
case WLAN_EID_DS_PARAMS:
if (elen >= 1)
elems->ds_params = pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_TIM:
if (elen >= sizeof(struct ieee80211_tim_ie)) {
elems->tim = (void *)pos;
elems->tim_len = elen;
} else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_VENDOR_SPECIFIC:
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
pos[2] == 0xf2) {
/* Microsoft OUI (00:50:F2) */
if (calc_crc)
crc = crc32_be(crc, pos - 2, elen + 2);
if (elen >= 5 && pos[3] == 2) {
/* OUI Type 2 - WMM IE */
if (pos[4] == 0) {
elems->wmm_info = pos;
elems->wmm_info_len = elen;
} else if (pos[4] == 1) {
elems->wmm_param = pos;
elems->wmm_param_len = elen;
}
}
}
break;
case WLAN_EID_RSN:
elems->rsn = pos;
elems->rsn_len = elen;
break;
case WLAN_EID_ERP_INFO:
if (elen >= 1)
elems->erp_info = pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_EXT_SUPP_RATES:
elems->ext_supp_rates = pos;
elems->ext_supp_rates_len = elen;
break;
case WLAN_EID_HT_CAPABILITY:
if (params->mode < IEEE80211_CONN_MODE_HT)
break;
if (elen >= sizeof(struct ieee80211_ht_cap))
elems->ht_cap_elem = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_HT_OPERATION:
if (params->mode < IEEE80211_CONN_MODE_HT)
break;
if (elen >= sizeof(struct ieee80211_ht_operation))
elems->ht_operation = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_VHT_CAPABILITY:
if (params->mode < IEEE80211_CONN_MODE_VHT)
break;
if (elen >= sizeof(struct ieee80211_vht_cap))
elems->vht_cap_elem = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_VHT_OPERATION:
if (params->mode < IEEE80211_CONN_MODE_VHT)
break;
if (elen >= sizeof(struct ieee80211_vht_operation)) {
elems->vht_operation = (void *)pos;
if (calc_crc)
crc = crc32_be(crc, pos - 2, elen + 2);
break;
}
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_OPMODE_NOTIF:
if (params->mode < IEEE80211_CONN_MODE_VHT)
break;
if (elen > 0) {
elems->opmode_notif = pos;
if (calc_crc)
crc = crc32_be(crc, pos - 2, elen + 2);
break;
}
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_MESH_ID:
elems->mesh_id = pos;
elems->mesh_id_len = elen;
break;
case WLAN_EID_MESH_CONFIG:
if (elen >= sizeof(struct ieee80211_meshconf_ie))
elems->mesh_config = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_PEER_MGMT:
elems->peering = pos;
elems->peering_len = elen;
break;
case WLAN_EID_MESH_AWAKE_WINDOW:
if (elen >= 2)
elems->awake_window = (void *)pos;
break;
case WLAN_EID_PREQ:
elems->preq = pos;
elems->preq_len = elen;
break;
case WLAN_EID_PREP:
elems->prep = pos;
elems->prep_len = elen;
break;
case WLAN_EID_PERR:
elems->perr = pos;
elems->perr_len = elen;
break;
case WLAN_EID_RANN:
if (elen >= sizeof(struct ieee80211_rann_ie))
elems->rann = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_CHANNEL_SWITCH:
if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->ch_switch_ie = (void *)pos;
break;
case WLAN_EID_EXT_CHANSWITCH_ANN:
if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->ext_chansw_ie = (void *)pos;
break;
case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
if (params->mode < IEEE80211_CONN_MODE_HT)
break;
if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->sec_chan_offs = (void *)pos;
break;
case WLAN_EID_CHAN_SWITCH_PARAM:
if (elen <
sizeof(*elems->mesh_chansw_params_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->mesh_chansw_params_ie = (void *)pos;
break;
case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
if (params->mode < IEEE80211_CONN_MODE_VHT)
break;
if (!params->action) {
elem_parse_failed =
IEEE80211_PARSE_ERR_UNEXPECTED_ELEM;
break;
}
if (elen < sizeof(*elems->wide_bw_chansw_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->wide_bw_chansw_ie = (void *)pos;
break;
case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
if (params->mode < IEEE80211_CONN_MODE_VHT)
break;
if (params->action) {
elem_parse_failed =
IEEE80211_PARSE_ERR_UNEXPECTED_ELEM;
break;
}
/*
* This is a bit tricky, but as we only care about
* a few elements, parse them out manually.
*/
subelem = cfg80211_find_elem(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
pos, elen);
if (subelem) {
if (subelem->datalen >= sizeof(*elems->wide_bw_chansw_ie))
elems->wide_bw_chansw_ie =
(void *)subelem->data;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
}
if (params->mode < IEEE80211_CONN_MODE_EHT)
break;
subelem = cfg80211_find_ext_elem(WLAN_EID_EXT_BANDWIDTH_INDICATION,
pos, elen);
if (subelem) {
const void *edata = subelem->data + 1;
u8 edatalen = subelem->datalen - 1;
if (ieee80211_bandwidth_indication_size_ok(edata,
edatalen))
elems->bandwidth_indication = edata;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
}
break;
case WLAN_EID_COUNTRY:
elems->country_elem = pos;
elems->country_elem_len = elen;
break;
case WLAN_EID_PWR_CONSTRAINT:
if (elen != 1) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->pwr_constr_elem = pos;
break;
case WLAN_EID_CISCO_VENDOR_SPECIFIC:
/* Lots of different options exist, but we only care
* about the Dynamic Transmit Power Control element.
* First check for the Cisco OUI, then for the DTPC
* tag (0x00).
*/
if (elen < 4) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
if (pos[0] != 0x00 || pos[1] != 0x40 ||
pos[2] != 0x96 || pos[3] != 0x00)
break;
if (elen != 6) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
if (calc_crc)
crc = crc32_be(crc, pos - 2, elen + 2);
elems->cisco_dtpc_elem = pos;
break;
case WLAN_EID_ADDBA_EXT:
if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
}
elems->addba_ext_ie = (void *)pos;
break;
case WLAN_EID_TIMEOUT_INTERVAL:
if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
elems->timeout_int = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
if (elen >= sizeof(*elems->max_idle_period_ie))
elems->max_idle_period_ie = (void *)pos;
break;
case WLAN_EID_RSNX:
elems->rsnx = pos;
elems->rsnx_len = elen;
break;
case WLAN_EID_TX_POWER_ENVELOPE:
if (elen < 1 ||
elen > sizeof(struct ieee80211_tx_pwr_env))
break;
if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
break;
elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
elems->tx_pwr_env_num++;
break;
case WLAN_EID_EXTENSION:
ieee80211_parse_extension_element(calc_crc ?
&crc : NULL,
elem, elems, params);
break;
case WLAN_EID_S1G_CAPABILITIES:
if (params->mode != IEEE80211_CONN_MODE_S1G)
break;
if (elen >= sizeof(*elems->s1g_capab))
elems->s1g_capab = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_S1G_OPERATION:
if (params->mode != IEEE80211_CONN_MODE_S1G)
break;
if (elen == sizeof(*elems->s1g_oper))
elems->s1g_oper = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_S1G_BCN_COMPAT:
if (params->mode != IEEE80211_CONN_MODE_S1G)
break;
if (elen == sizeof(*elems->s1g_bcn_compat))
elems->s1g_bcn_compat = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
case WLAN_EID_AID_RESPONSE:
if (params->mode != IEEE80211_CONN_MODE_S1G)
break;
if (elen == sizeof(struct ieee80211_aid_response_ie))
elems->aid_resp = (void *)pos;
else
elem_parse_failed =
IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
break;
default:
break;
}
if (elem_parse_failed)
elems->parse_error |= elem_parse_failed;
else
__set_bit(id, seen_elems);
}
if (!for_each_element_completed(elem, params->start, params->len))
elems->parse_error |= IEEE80211_PARSE_ERR_INVALID_END;
return crc;
}
static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
struct ieee802_11_elems *elems,
struct cfg80211_bss *bss,
u8 *nontransmitted_profile)
{
const struct element *elem, *sub;
size_t profile_len = 0;
bool found = false;
if (!bss || !bss->transmitted_bss)
return profile_len;
for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
if (elem->datalen < 2)
continue;
if (elem->data[0] < 1 || elem->data[0] > 8)
continue;
for_each_element(sub, elem->data + 1, elem->datalen - 1) {
u8 new_bssid[ETH_ALEN];
const u8 *index;
if (sub->id != 0 || sub->datalen < 4) {
/* not a valid BSS profile */
continue;
}
if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
sub->data[1] != 2) {
/* The first element of the
* Nontransmitted BSSID Profile is not
* the Nontransmitted BSSID Capability
* element.
*/
continue;
}
memset(nontransmitted_profile, 0, len);
profile_len = cfg80211_merge_profile(start, len,
elem,
sub,
nontransmitted_profile,
len);
/* found a Nontransmitted BSSID Profile */
index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
nontransmitted_profile,
profile_len);
if (!index || index[1] < 1 || index[2] == 0) {
/* Invalid MBSSID Index element */
continue;
}
cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
elem->data[0],
index[2],
new_bssid);
if (ether_addr_equal(new_bssid, bss->bssid)) {
found = true;
elems->bssid_index_len = index[1];
elems->bssid_index = (void *)&index[2];
break;
}
}
}
return found ? profile_len : 0;
}
static void ieee80211_mle_get_sta_prof(struct ieee802_11_elems *elems,
u8 link_id)
{
const struct ieee80211_multi_link_elem *ml = elems->ml_basic;
ssize_t ml_len = elems->ml_basic_len;
const struct element *sub;
if (!ml || !ml_len)
return;
if (le16_get_bits(ml->control, IEEE80211_ML_CONTROL_TYPE) !=
IEEE80211_ML_CONTROL_TYPE_BASIC)
return;
for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
ssize_t sta_prof_len;
u16 control;
if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
continue;
if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data,
sub->datalen))
return;
control = le16_to_cpu(prof->control);
if (link_id != u16_get_bits(control,
IEEE80211_MLE_STA_CONTROL_LINK_ID))
continue;
if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE))
return;
/* the sub element can be fragmented */
sta_prof_len =
cfg80211_defragment_element(sub,
(u8 *)ml, ml_len,
elems->scratch_pos,
elems->scratch +
elems->scratch_len -
elems->scratch_pos,
IEEE80211_MLE_SUBELEM_FRAGMENT);
if (sta_prof_len < 0)
return;
elems->prof = (void *)elems->scratch_pos;
elems->sta_prof_len = sta_prof_len;
elems->scratch_pos += sta_prof_len;
return;
}
}
static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems,
struct ieee80211_elems_parse_params *params)
{
struct ieee80211_mle_per_sta_profile *prof;
struct ieee80211_elems_parse_params sub = {
.mode = params->mode,
.action = params->action,
.from_ap = params->from_ap,
.link_id = -1,
};
ssize_t ml_len = elems->ml_basic_len;
const struct element *non_inherit = NULL;
const u8 *end;
if (params->link_id == -1)
return;
ml_len = cfg80211_defragment_element(elems->ml_basic_elem,
elems->ie_start,
elems->total_len,
elems->scratch_pos,
elems->scratch +
elems->scratch_len -
elems->scratch_pos,
WLAN_EID_FRAGMENT);
if (ml_len < 0)
return;
elems->ml_basic = (const void *)elems->scratch_pos;
elems->ml_basic_len = ml_len;
elems->scratch_pos += ml_len;
ieee80211_mle_get_sta_prof(elems, params->link_id);
prof = elems->prof;
if (!prof)
return;
/* check if we have the 4 bytes for the fixed part in assoc response */
if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) {
elems->prof = NULL;
elems->sta_prof_len = 0;
return;
}
/*
* Skip the capability information and the status code that are expected
* as part of the station profile in association response frames. Note
* the -1 is because the 'sta_info_len' is accounted to as part of the
* per-STA profile, but not part of the 'u8 variable[]' portion.
*/
sub.start = prof->variable + prof->sta_info_len - 1 + 4;
end = (const u8 *)prof + elems->sta_prof_len;
sub.len = end - sub.start;
non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
sub.start, sub.len);
_ieee802_11_parse_elems_full(&sub, elems, non_inherit);
}
struct ieee802_11_elems *
ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
{
struct ieee802_11_elems *elems;
const struct element *non_inherit = NULL;
u8 *nontransmitted_profile;
int nontransmitted_profile_len = 0;
size_t scratch_len = 3 * params->len;
elems = kzalloc(struct_size(elems, scratch, scratch_len), GFP_ATOMIC);
if (!elems)
return NULL;
elems->ie_start = params->start;
elems->total_len = params->len;
elems->scratch_len = scratch_len;
elems->scratch_pos = elems->scratch;
nontransmitted_profile = elems->scratch_pos;
nontransmitted_profile_len =
ieee802_11_find_bssid_profile(params->start, params->len,
elems, params->bss,
nontransmitted_profile);
elems->scratch_pos += nontransmitted_profile_len;
elems->scratch_len -= nontransmitted_profile_len;
non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
nontransmitted_profile,
nontransmitted_profile_len);
elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
/* Override with nontransmitted profile, if found */
if (nontransmitted_profile_len) {
struct ieee80211_elems_parse_params sub = {
.mode = params->mode,
.start = nontransmitted_profile,
.len = nontransmitted_profile_len,
.action = params->action,
.link_id = params->link_id,
};
_ieee802_11_parse_elems_full(&sub, elems, NULL);
}
ieee80211_mle_parse_link(elems, params);
if (elems->tim && !elems->parse_error) {
const struct ieee80211_tim_ie *tim_ie = elems->tim;
elems->dtim_period = tim_ie->dtim_period;
elems->dtim_count = tim_ie->dtim_count;
}
/* Override DTIM period and count if needed */
if (elems->bssid_index &&
elems->bssid_index_len >=
offsetofend(struct ieee80211_bssid_index, dtim_period))
elems->dtim_period = elems->bssid_index->dtim_period;
if (elems->bssid_index &&
elems->bssid_index_len >=
offsetofend(struct ieee80211_bssid_index, dtim_count))
elems->dtim_count = elems->bssid_index->dtim_count;
return elems;
}
EXPORT_SYMBOL_IF_KUNIT(ieee802_11_parse_elems_full);
int ieee80211_parse_bitrates(enum nl80211_chan_width width,
const struct ieee80211_supported_band *sband,
const u8 *srates, int srates_len, u32 *rates)
{
u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
struct ieee80211_rate *br;
int brate, rate, i, j, count = 0;
*rates = 0;
for (i = 0; i < srates_len; i++) {
rate = srates[i] & 0x7f;
for (j = 0; j < sband->n_bitrates; j++) {
br = &sband->bitrates[j];
if ((rate_flags & br->flags) != rate_flags)
continue;
brate = DIV_ROUND_UP(br->bitrate, 5);
if (brate == rate) {
*rates |= BIT(j);
count++;
break;
}
}
}
return count;
}
|