aboutsummaryrefslogtreecommitdiffstats
path: root/wpa_supplicant/rrm.c
blob: f4fbfa7193524810404bf7de9076abc1dbb6b8dc (plain)
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
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
/*
 * wpa_supplicant - Radio Measurements
 * Copyright (c) 2003-2016, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"

#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_common.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "bss.h"
#include "scan.h"
#include "p2p_supplicant.h"


static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx)
{
	struct rrm_data *rrm = data;

	if (!rrm->notify_neighbor_rep) {
		wpa_printf(MSG_ERROR,
			   "RRM: Unexpected neighbor report timeout");
		return;
	}

	wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report - NONE");
	rrm->notify_neighbor_rep(rrm->neighbor_rep_cb_ctx, NULL);

	rrm->notify_neighbor_rep = NULL;
	rrm->neighbor_rep_cb_ctx = NULL;
}


/*
 * wpas_rrm_reset - Clear and reset all RRM data in wpa_supplicant
 * @wpa_s: Pointer to wpa_supplicant
 */
void wpas_rrm_reset(struct wpa_supplicant *wpa_s)
{
	wpa_s->rrm.rrm_used = 0;

	eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
			     NULL);
	if (wpa_s->rrm.notify_neighbor_rep)
		wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
	wpa_s->rrm.next_neighbor_rep_token = 1;
	wpas_clear_beacon_rep_data(wpa_s);
}


/*
 * wpas_rrm_process_neighbor_rep - Handle incoming neighbor report
 * @wpa_s: Pointer to wpa_supplicant
 * @report: Neighbor report buffer, prefixed by a 1-byte dialog token
 * @report_len: Length of neighbor report buffer
 */
void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
				   const u8 *report, size_t report_len)
{
	struct wpabuf *neighbor_rep;

	wpa_hexdump(MSG_DEBUG, "RRM: New Neighbor Report", report, report_len);
	if (report_len < 1)
		return;

	if (report[0] != wpa_s->rrm.next_neighbor_rep_token - 1) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Discarding neighbor report with token %d (expected %d)",
			   report[0], wpa_s->rrm.next_neighbor_rep_token - 1);
		return;
	}

	eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
			     NULL);

	if (!wpa_s->rrm.notify_neighbor_rep) {
		wpa_printf(MSG_ERROR, "RRM: Unexpected neighbor report");
		return;
	}

	/* skipping the first byte, which is only an id (dialog token) */
	neighbor_rep = wpabuf_alloc(report_len - 1);
	if (!neighbor_rep) {
		wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
		return;
	}
	wpabuf_put_data(neighbor_rep, report + 1, report_len - 1);
	wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report (token = %d)",
		   report[0]);
	wpa_s->rrm.notify_neighbor_rep(wpa_s->rrm.neighbor_rep_cb_ctx,
				       neighbor_rep);
	wpa_s->rrm.notify_neighbor_rep = NULL;
	wpa_s->rrm.neighbor_rep_cb_ctx = NULL;
}


#if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
/* Workaround different, undefined for Windows, error codes used here */
#define ENOTCONN -1
#define EOPNOTSUPP -1
#define ECANCELED -1
#endif

/* Measurement Request element + Location Subject + Maximum Age subelement */
#define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4)
/* Measurement Request element + Location Civic Request */
#define MEASURE_REQUEST_CIVIC_LEN (3 + 5)


/**
 * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP
 * @wpa_s: Pointer to wpa_supplicant
 * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE
 *	  is sent in the request.
 * @lci: if set, neighbor request will include LCI request
 * @civic: if set, neighbor request will include civic location request
 * @cb: Callback function to be called once the requested report arrives, or
 *	timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds.
 *	In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's
 *	the requester's responsibility to free it.
 *	In the latter case NULL will be sent in 'neighbor_rep'.
 * @cb_ctx: Context value to send the callback function
 * Returns: 0 in case of success, negative error code otherwise
 *
 * In case there is a previous request which has not been answered yet, the
 * new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT.
 * Request must contain a callback function.
 */
int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
				       const struct wpa_ssid_value *ssid,
				       int lci, int civic,
				       void (*cb)(void *ctx,
						  struct wpabuf *neighbor_rep),
				       void *cb_ctx)
{
	struct wpabuf *buf;
	const u8 *rrm_ie;

	if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) {
		wpa_printf(MSG_DEBUG, "RRM: No connection, no RRM.");
		return -ENOTCONN;
	}

	if (!wpa_s->rrm.rrm_used) {
		wpa_printf(MSG_DEBUG, "RRM: No RRM in current connection.");
		return -EOPNOTSUPP;
	}

	rrm_ie = wpa_bss_get_ie(wpa_s->current_bss,
				WLAN_EID_RRM_ENABLED_CAPABILITIES);
	if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) ||
	    !(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
		wpa_printf(MSG_DEBUG,
			   "RRM: No network support for Neighbor Report.");
		return -EOPNOTSUPP;
	}

	/* Refuse if there's a live request */
	if (wpa_s->rrm.notify_neighbor_rep) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Currently handling previous Neighbor Report.");
		return -EBUSY;
	}

	/* 3 = action category + action code + dialog token */
	buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) +
			   (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) +
			   (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0));
	if (buf == NULL) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Failed to allocate Neighbor Report Request");
		return -ENOMEM;
	}

	wpa_printf(MSG_DEBUG, "RRM: Neighbor report request (for %s), token=%d",
		   (ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""),
		   wpa_s->rrm.next_neighbor_rep_token);

	wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
	wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST);
	wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token);
	if (ssid) {
		wpabuf_put_u8(buf, WLAN_EID_SSID);
		wpabuf_put_u8(buf, ssid->ssid_len);
		wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len);
	}

	if (lci) {
		/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
		wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
		wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN);

		/*
		 * Measurement token; nonzero number that is unique among the
		 * Measurement Request elements in a particular frame.
		 */
		wpabuf_put_u8(buf, 1); /* Measurement Token */

		/*
		 * Parallel, Enable, Request, and Report bits are 0, Duration is
		 * reserved.
		 */
		wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
		wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */

		/* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */
		/* Location Subject */
		wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);

		/* Optional Subelements */
		/*
		 * IEEE P802.11-REVmc/D5.0 Figure 9-170
		 * The Maximum Age subelement is required, otherwise the AP can
		 * send only data that was determined after receiving the
		 * request. Setting it here to unlimited age.
		 */
		wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE);
		wpabuf_put_u8(buf, 2);
		wpabuf_put_le16(buf, 0xffff);
	}

	if (civic) {
		/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
		wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
		wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN);

		/*
		 * Measurement token; nonzero number that is unique among the
		 * Measurement Request elements in a particular frame.
		 */
		wpabuf_put_u8(buf, 2); /* Measurement Token */

		/*
		 * Parallel, Enable, Request, and Report bits are 0, Duration is
		 * reserved.
		 */
		wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
		/* Measurement Type */
		wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC);

		/* IEEE P802.11-REVmc/D5.0 9.4.2.21.14:
		 * Location Civic request */
		/* Location Subject */
		wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
		wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */
		/* Location Service Interval Units: Seconds */
		wpabuf_put_u8(buf, 0);
		/* Location Service Interval: 0 - Only one report is requested
		 */
		wpabuf_put_le16(buf, 0);
		/* No optional subelements */
	}

	wpa_s->rrm.next_neighbor_rep_token++;

	if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
				wpa_s->own_addr, wpa_s->bssid,
				wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Failed to send Neighbor Report Request");
		wpabuf_free(buf);
		return -ECANCELED;
	}

	wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx;
	wpa_s->rrm.notify_neighbor_rep = cb;
	eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0,
			       wpas_rrm_neighbor_rep_timeout_handler,
			       &wpa_s->rrm, NULL);

	wpabuf_free(buf);
	return 0;
}


static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type,
				const u8 *data, size_t data_len)
{
	if (wpabuf_resize(buf, 5 + data_len))
		return -1;

	wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT);
	wpabuf_put_u8(*buf, 3 + data_len);
	wpabuf_put_u8(*buf, token);
	wpabuf_put_u8(*buf, mode);
	wpabuf_put_u8(*buf, type);

	if (data_len)
		wpabuf_put_data(*buf, data, data_len);

	return 0;
}


static int
wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s,
			  const struct rrm_measurement_request_element *req,
			  struct wpabuf **buf)
{
	u8 subject;
	u16 max_age = 0;
	struct os_reltime t, diff;
	unsigned long diff_l;
	const u8 *subelem;
	const u8 *request = req->variable;
	size_t len = req->len - 3;

	if (len < 1)
		return -1;

	if (!wpa_s->lci)
		goto reject;

	subject = *request++;
	len--;

	wpa_printf(MSG_DEBUG, "Measurement request location subject=%u",
		   subject);

	if (subject != LOCATION_SUBJECT_REMOTE) {
		wpa_printf(MSG_INFO,
			   "Not building LCI report - bad location subject");
		return 0;
	}

	/* Subelements are formatted exactly like elements */
	wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len);
	subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE);
	if (subelem && subelem[1] == 2)
		max_age = WPA_GET_LE16(subelem + 2);

	if (os_get_reltime(&t))
		goto reject;

	os_reltime_sub(&t, &wpa_s->lci_time, &diff);
	/* LCI age is calculated in 10th of a second units. */
	diff_l = diff.sec * 10 + diff.usec / 100000;

	if (max_age != 0xffff && max_age < diff_l)
		goto reject;

	if (wpas_rrm_report_elem(buf, req->token,
				 MEASUREMENT_REPORT_MODE_ACCEPT, req->type,
				 wpabuf_head_u8(wpa_s->lci),
				 wpabuf_len(wpa_s->lci)) < 0) {
		wpa_printf(MSG_DEBUG, "Failed to add LCI report element");
		return -1;
	}

	return 0;

reject:
	if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
	    wpas_rrm_report_elem(buf, req->token,
				 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
				 req->type, NULL, 0) < 0) {
		wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
		return -1;
	}

	return 0;
}


static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s,
					  const u8 *data, size_t len)
{
	struct wpabuf *report = wpabuf_alloc(len + 3);

	if (!report)
		return;

	wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT);
	wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT);
	wpabuf_put_u8(report, wpa_s->rrm.token);

	wpabuf_put_data(report, data, len);

	if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
				wpa_s->own_addr, wpa_s->bssid,
				wpabuf_head(report), wpabuf_len(report), 0)) {
		wpa_printf(MSG_ERROR,
			   "RRM: Radio measurement report failed: Sending Action frame failed");
	}

	wpabuf_free(report);
}


static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s,
				     struct wpabuf *buf)
{
	int len = wpabuf_len(buf);
	const u8 *pos = wpabuf_head_u8(buf), *next = pos;

#define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3)

	while (len) {
		int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len;

		if (send_len == len ||
		    (send_len + next[1] + 2) > MPDU_REPORT_LEN) {
			wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len);
			len -= send_len;
			pos = next;
		}

		if (len)
			next += next[1] + 2;
	}
#undef MPDU_REPORT_LEN
}


static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels,
			    int *freqs)
{
	size_t i;

	for (i = 0; i < num_primary_channels; i++) {
		u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4;

		freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan);
		/* ieee80211_chan_to_freq() is not really meant for this
		 * conversion of 20 MHz primary channel numbers for wider VHT
		 * channels, so handle those as special cases here for now. */
		if (freqs[i] < 0 &&
		    (op_class == 128 || op_class == 129 || op_class == 130))
			freqs[i] = 5000 + 5 * primary_chan;
		if (freqs[i] < 0) {
			wpa_printf(MSG_DEBUG,
				   "Beacon Report: Invalid channel %u",
				   chan);
			return -1;
		}
	}

	return 0;
}


static int * wpas_add_channels(const struct oper_class_map *op,
			       struct hostapd_hw_modes *mode, int active,
			       const u8 *channels, const u8 size)
{
	int *freqs, *next_freq;
	u8 num_primary_channels, i;
	u8 num_chans;

	num_chans = channels ? size :
		(op->max_chan - op->min_chan) / op->inc + 1;

	if (op->bw == BW80 || op->bw == BW80P80)
		num_primary_channels = 4;
	else if (op->bw == BW160)
		num_primary_channels = 8;
	else
		num_primary_channels = 1;

	/* one extra place for the zero-terminator */
	freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs));
	if (!freqs) {
		wpa_printf(MSG_ERROR,
			   "Beacon Report: Failed to allocate freqs array");
		return NULL;
	}

	next_freq = freqs;
	for  (i = 0; i < num_chans; i++) {
		u8 chan = channels ? channels[i] : op->min_chan + i * op->inc;
		enum chan_allowed res = verify_channel(mode, chan, op->bw);

		if (res == NOT_ALLOWED || (res == NO_IR && active))
			continue;

		if (wpas_add_channel(op->op_class, chan, num_primary_channels,
				     next_freq) < 0) {
			os_free(freqs);
			return NULL;
		}

		next_freq += num_primary_channels;
	}

	if (!freqs[0]) {
		os_free(freqs);
		return NULL;
	}

	return freqs;
}


static int * wpas_op_class_freqs(const struct oper_class_map *op,
				 struct hostapd_hw_modes *mode, int active)
{
	u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 };
	u8 channels_160mhz[] = { 50, 114 };

	/*
	 * When adding all channels in the operating class, 80 + 80 MHz
	 * operating classes are like 80 MHz channels because we add all valid
	 * channels anyway.
	 */
	if (op->bw == BW80 || op->bw == BW80P80)
		return wpas_add_channels(op, mode, active, channels_80mhz,
					 ARRAY_SIZE(channels_80mhz));

	if (op->bw == BW160)
		return wpas_add_channels(op, mode, active, channels_160mhz,
					 ARRAY_SIZE(channels_160mhz));

	return wpas_add_channels(op, mode, active, NULL, 0);
}


static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
				       const char *country, const u8 *subelems,
				       size_t len)
{
	int *freqs = NULL, *new_freqs;
	const u8 *end = subelems + len;

	while (end - subelems > 2) {
		const struct oper_class_map *op;
		const u8 *ap_chan_elem, *pos;
		u8 left;
		struct hostapd_hw_modes *mode;

		ap_chan_elem = get_ie(subelems, end - subelems,
				      WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
		if (!ap_chan_elem)
			break;
		pos = ap_chan_elem + 2;
		left = ap_chan_elem[1];
		if (left < 1)
			break;
		subelems = ap_chan_elem + 2 + left;

		op = get_oper_class(country, *pos);
		if (!op) {
			wpa_printf(MSG_DEBUG,
				   "Beacon request: unknown operating class in AP Channel Report subelement %u",
				   *pos);
			goto out;
		}
		pos++;
		left--;

		mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
		if (!mode)
			continue;

		/*
		 * For 80 + 80 MHz operating classes, this AP Channel Report
		 * element should be followed by another element specifying
		 * the second 80 MHz channel. For now just add this 80 MHz
		 * channel, the second 80 MHz channel will be added when the
		 * next element is parsed.
		 * TODO: Verify that this AP Channel Report element is followed
		 * by a corresponding AP Channel Report element as specified in
		 * IEEE Std 802.11-2016, 11.11.9.1.
		 */
		new_freqs = wpas_add_channels(op, mode, active, pos, left);
		if (new_freqs)
			int_array_concat(&freqs, new_freqs);

		os_free(new_freqs);
	}

	return freqs;
out:
	os_free(freqs);
	return NULL;
}


static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
				       u8 op_class, u8 chan, int active,
				       const u8 *subelems, size_t len)
{
	int *freqs = NULL, *ext_freqs = NULL;
	struct hostapd_hw_modes *mode;
	const char *country = NULL;
	const struct oper_class_map *op;
	const u8 *elem;

	if (!wpa_s->current_bss)
		return NULL;
	elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
	if (elem && elem[1] >= 2)
		country = (const char *) (elem + 2);

	op = get_oper_class(country, op_class);
	if (!op) {
		wpa_printf(MSG_DEBUG,
			   "Beacon request: invalid operating class %d",
			   op_class);
		return NULL;
	}

	mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
	if (!mode)
		return NULL;

	switch (chan) {
	case 0:
		freqs = wpas_op_class_freqs(op, mode, active);
		if (!freqs)
			return NULL;
		break;
	case 255:
		/* freqs will be added from AP channel subelements */
		break;
	default:
		freqs = wpas_add_channels(op, mode, active, &chan, 1);
		if (!freqs)
			return NULL;
		break;
	}

	ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
					      len);
	if (ext_freqs) {
		int_array_concat(&freqs, ext_freqs);
		os_free(ext_freqs);
		int_array_sort_unique(freqs);
	}

	return freqs;
}


static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
				u8 *op_class, u8 *chan, u8 *phy_type)
{
	const u8 *ie;
	int sec_chan = 0, vht = 0;
	struct ieee80211_ht_operation *ht_oper = NULL;
	struct ieee80211_vht_operation *vht_oper = NULL;
	u8 seg0, seg1;

	ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
	if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
		u8 sec_chan_offset;

		ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
		sec_chan_offset = ht_oper->ht_param &
			HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
		if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
			sec_chan = 1;
		else if (sec_chan_offset ==
			 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
			sec_chan = -1;
	}

	ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
	if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
		vht_oper = (struct ieee80211_vht_operation *) (ie + 2);

		switch (vht_oper->vht_op_info_chwidth) {
		case 1:
			seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
			seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
			if (seg1 && abs(seg1 - seg0) == 8)
				vht = VHT_CHANWIDTH_160MHZ;
			else if (seg1)
				vht = VHT_CHANWIDTH_80P80MHZ;
			else
				vht = VHT_CHANWIDTH_80MHZ;
			break;
		case 2:
			vht = VHT_CHANWIDTH_160MHZ;
			break;
		case 3:
			vht = VHT_CHANWIDTH_80P80MHZ;
			break;
		default:
			vht = VHT_CHANWIDTH_USE_HT;
			break;
		}
	}

	if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
					  chan) == NUM_HOSTAPD_MODES) {
		wpa_printf(MSG_DEBUG,
			   "Cannot determine operating class and channel");
		return -1;
	}

	*phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
					   vht_oper != NULL);
	if (*phy_type == PHY_TYPE_UNSPECIFIED) {
		wpa_printf(MSG_DEBUG, "Cannot determine phy type");
		return -1;
	}

	return 0;
}


static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
					  enum beacon_report_detail detail,
					  struct wpa_bss *bss, u8 *buf,
					  size_t buf_len)
{
	u8 *ies = (u8 *) (bss + 1);
	size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
	u8 *pos = buf;
	int rem_len;

	rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
		sizeof(struct rrm_measurement_report_element) - 2;

	if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
		wpa_printf(MSG_DEBUG,
			   "Beacon Request: Invalid reporting detail: %d",
			   detail);
		return -1;
	}

	if (detail == BEACON_REPORT_DETAIL_NONE)
		return 0;

	/*
	 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
	 * beacon interval(2) + capabilities(2) = 14 bytes
	 */
	if (buf_len < 14)
		return 0;

	*pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
	/* The length will be filled later */
	pos++;
	WPA_PUT_LE64(pos, bss->tsf);
	pos += sizeof(bss->tsf);
	WPA_PUT_LE16(pos, bss->beacon_int);
	pos += 2;
	WPA_PUT_LE16(pos, bss->caps);
	pos += 2;

	rem_len -= pos - buf;

	/*
	 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
	 * body subelement causes the element to exceed the maximum element
	 * size, the subelement is truncated so that the last IE is a complete
	 * IE. So even when required to report all IEs, add elements one after
	 * the other and stop once there is no more room in the measurement
	 * element.
	 */
	while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
		if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
		    (eids && bitfield_is_set(eids, ies[0]))) {
			u8 eid = ies[0], elen = ies[1];

			if ((eid == WLAN_EID_TIM || eid == WLAN_EID_RSN) &&
			    elen > 4)
				elen = 4;
			/*
			 * TODO: Truncate IBSS DFS element as described in
			 * IEEE Std 802.11-2016, 9.4.2.22.7.
			 */

			if (2 + elen > buf + buf_len - pos ||
			    2 + elen > rem_len)
				break;

			*pos++ = ies[0];
			*pos++ = elen;
			os_memcpy(pos, ies + 2, elen);
			pos += elen;
			rem_len -= 2 + elen;
		}

		ies_len -= 2 + ies[1];
		ies += 2 + ies[1];
	}

	/* Now the length is known */
	buf[1] = pos - buf - 2;
	return pos - buf;
}


static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
			       struct wpabuf **wpa_buf, struct wpa_bss *bss,
			       u64 start, u64 parent_tsf)
{
	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
	u8 *ie = (u8 *) (bss + 1);
	size_t ie_len = bss->ie_len + bss->beacon_ie_len;
	int ret;
	u8 *buf;
	struct rrm_measurement_beacon_report *rep;

	if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
	    os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
		return 0;

	if (data->ssid_len &&
	    (data->ssid_len != bss->ssid_len ||
	     os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
		return 0;

	/* Maximum element length: beacon report element + reported frame body
	 * subelement + all IEs of the reported beacon */
	buf = os_malloc(sizeof(*rep) + 14 + ie_len);
	if (!buf)
		return -1;

	rep = (struct rrm_measurement_beacon_report *) buf;
	if (wpas_get_op_chan_phy(bss->freq, ie, ie_len, &rep->op_class,
				 &rep->channel, &rep->report_info) < 0) {
		ret = 0;
		goto out;
	}

	rep->start_time = host_to_le64(start);
	rep->duration = host_to_le16(data->scan_params.duration);
	rep->rcpi = rssi_to_rcpi(bss->level);
	rep->rsni = 255; /* 255 indicates that RSNI is not available */
	os_memcpy(rep->bssid, bss->bssid, ETH_ALEN);
	rep->antenna_id = 0; /* unknown */
	rep->parent_tsf = host_to_le32(parent_tsf);

	ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
					     bss, rep->variable, 14 + ie_len);
	if (ret < 0)
		goto out;

	ret = wpas_rrm_report_elem(wpa_buf, wpa_s->beacon_rep_data.token,
				   MEASUREMENT_REPORT_MODE_ACCEPT,
				   MEASURE_TYPE_BEACON, buf,
				   ret + sizeof(*rep));
out:
	os_free(buf);
	return ret;
}


static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
				      struct wpabuf **buf)
{
	return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
				    MEASUREMENT_REPORT_MODE_ACCEPT,
				    MEASURE_TYPE_BEACON, NULL, 0);
}


static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
				  struct wpabuf **buf)
{
	size_t i;

	for (i = 0; i < wpa_s->last_scan_res_used; i++) {
		if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
					0, 0) < 0)
			break;
	}

	if (!(*buf))
		wpas_beacon_rep_no_results(wpa_s, buf);

	wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
}


void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
{
	if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
		struct wpabuf *buf = NULL;

		if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
					 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
					 MEASURE_TYPE_BEACON, NULL, 0)) {
			wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
			wpabuf_free(buf);
			return;
		}

		wpas_rrm_send_msr_report(wpa_s, buf);
		wpabuf_free(buf);
	}

	wpas_clear_beacon_rep_data(wpa_s);
}


static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;
	struct wpa_driver_scan_params *params =
		&wpa_s->beacon_rep_data.scan_params;
	u16 prev_duration = params->duration;

	if (!wpa_s->current_bss)
		return;

	if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
	    params->duration) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Cannot set scan duration due to missing driver support");
		params->duration = 0;
	}
	os_get_reltime(&wpa_s->beacon_rep_scan);
	if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
	    wpa_supplicant_trigger_scan(wpa_s, params))
		wpas_rrm_refuse_request(wpa_s);
	params->duration = prev_duration;
}


static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
					     struct beacon_rep_data *data,
					     u8 sid, u8 slen, const u8 *subelem)
{
	u8 report_info, i;

	switch (sid) {
	case WLAN_BEACON_REQUEST_SUBELEM_SSID:
		if (!slen) {
			wpa_printf(MSG_DEBUG,
				   "SSID subelement with zero length - wildcard SSID");
			break;
		}

		if (slen > SSID_MAX_LEN) {
			wpa_printf(MSG_DEBUG,
				   "Invalid SSID subelement length: %u", slen);
			return -1;
		}

		data->ssid_len = slen;
		os_memcpy(data->ssid, subelem, data->ssid_len);
		break;
	case WLAN_BEACON_REQUEST_SUBELEM_INFO:
		if (slen != 2) {
			wpa_printf(MSG_DEBUG,
				   "Invalid reporting information subelement length: %u",
				   slen);
			return -1;
		}

		report_info = subelem[0];
		if (report_info != 0) {
			wpa_printf(MSG_DEBUG,
				   "reporting information=%u is not supported",
				   report_info);
			return 0;
		}
		break;
	case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
		if (slen != 1) {
			wpa_printf(MSG_DEBUG,
				   "Invalid reporting detail subelement length: %u",
				   slen);
			return -1;
		}

		data->report_detail = subelem[0];
		if (data->report_detail >
		    BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
			wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
				   subelem[0]);
			return -1;
		}

		break;
	case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
		if (data->report_detail !=
		    BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
			wpa_printf(MSG_DEBUG,
				   "Beacon request: request subelement is present but report detail is %u",
				   data->report_detail);
			return -1;
		}

		if (!slen) {
			wpa_printf(MSG_DEBUG,
				   "Invalid request subelement length: %u",
				   slen);
			return -1;
		}

		if (data->eids) {
			wpa_printf(MSG_DEBUG,
				   "Beacon Request: Request subelement appears more than once");
			return -1;
		}

		data->eids = bitfield_alloc(255);
		if (!data->eids) {
			wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
			return -1;
		}

		for (i = 0; i < slen; i++)
			bitfield_set(data->eids, subelem[i]);
		break;
	case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
		/* Skip - it will be processed when freqs are added */
		break;
	default:
		wpa_printf(MSG_DEBUG,
			   "Beacon request: Unknown subelement id %u", sid);
		break;
	}

	return 1;
}


/**
 * Returns 0 if the next element can be processed, 1 if some operation was
 * triggered, and -1 if processing failed (i.e., the element is in invalid
 * format or an internal error occurred).
 */
static int
wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
			  u8 elem_token, int duration_mandatory,
			  const struct rrm_measurement_beacon_request *req,
			  size_t len, struct wpabuf **buf)
{
	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
	struct wpa_driver_scan_params *params = &data->scan_params;
	const u8 *subelems;
	size_t elems_len;
	u16 rand_interval;
	u32 interval_usec;
	u32 _rand;
	int ret = 0, res;
	u8 reject_mode;

	if (len < sizeof(*req))
		return -1;

	if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
	    req->mode != BEACON_REPORT_MODE_ACTIVE &&
	    req->mode != BEACON_REPORT_MODE_TABLE)
		return 0;

	subelems = req->variable;
	elems_len = len - sizeof(*req);
	rand_interval = le_to_host16(req->rand_interval);

	os_free(params->freqs);
	os_memset(params, 0, sizeof(*params));

	data->token = elem_token;

	/* default reporting detail is all fixed length fields and all
	 * elements */
	data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
	os_memcpy(data->bssid, req->bssid, ETH_ALEN);

	while (elems_len >= 2) {
		if (subelems[1] > elems_len - 2) {
			wpa_printf(MSG_DEBUG,
				   "Beacon Request: Truncated subelement");
			ret = -1;
			goto out;
		}

		res = wpas_rm_handle_beacon_req_subelem(
			wpa_s, data, subelems[0], subelems[1], &subelems[2]);
		if (res < 0) {
			ret = res;
			goto out;
		} else if (!res) {
			reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE;
			goto out_reject;
		}

		elems_len -= 2 + subelems[1];
		subelems += 2 + subelems[1];
	}

	if (req->mode == BEACON_REPORT_MODE_TABLE) {
		wpas_beacon_rep_table(wpa_s, buf);
		goto out;
	}

	params->freqs = wpas_beacon_request_freqs(
		wpa_s, req->oper_class, req->channel,
		req->mode == BEACON_REPORT_MODE_ACTIVE,
		req->variable, len - sizeof(*req));
	if (!params->freqs) {
		wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
		reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED;
		goto out_reject;
	}

	params->duration = le_to_host16(req->duration);
	params->duration_mandatory = duration_mandatory;
	if (!params->duration) {
		wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
		ret = -1;
		goto out;
	}

	params->only_new_results = 1;

	if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
		params->ssids[params->num_ssids].ssid = data->ssid;
		params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
	}

	if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
		_rand = os_random();
	interval_usec = (_rand % (rand_interval + 1)) * 1024;
	eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
			       NULL);
	return 1;
out_reject:
	if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
	    wpas_rrm_report_elem(buf, elem_token, reject_mode,
				 MEASURE_TYPE_BEACON, NULL, 0) < 0) {
		wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
		ret = -1;
	}
out:
	wpas_clear_beacon_rep_data(wpa_s);
	return ret;
}


static int
wpas_rrm_handle_msr_req_element(
	struct wpa_supplicant *wpa_s,
	const struct rrm_measurement_request_element *req,
	struct wpabuf **buf)
{
	int duration_mandatory;

	wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
		   req->type, req->token);

	if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
		/* Enable bit is not supported for now */
		wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
		return 0;
	}

	if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
	    req->type > MEASURE_TYPE_RPI_HIST) {
		/* Parallel measurements are not supported for now */
		wpa_printf(MSG_DEBUG,
			   "RRM: Parallel measurements are not supported, reject");
		goto reject;
	}

	duration_mandatory =
		!!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);

	switch (req->type) {
	case MEASURE_TYPE_LCI:
		return wpas_rrm_build_lci_report(wpa_s, req, buf);
	case MEASURE_TYPE_BEACON:
		if (duration_mandatory &&
		    !(wpa_s->drv_rrm_flags &
		      WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
			wpa_printf(MSG_DEBUG,
				   "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
			goto reject;
		}
		return wpas_rm_handle_beacon_req(wpa_s, req->token,
						 duration_mandatory,
						 (const void *) req->variable,
						 req->len - 3, buf);
	default:
		wpa_printf(MSG_INFO,
			   "RRM: Unsupported radio measurement type %u",
			   req->type);
		break;
	}

reject:
	if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
	    wpas_rrm_report_elem(buf, req->token,
				 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
				 req->type, NULL, 0) < 0) {
		wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
		return -1;
	}

	return 0;
}


static struct wpabuf *
wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
			       size_t len)
{
	struct wpabuf *buf = NULL;

	while (len) {
		const struct rrm_measurement_request_element *req;
		int res;

		if (len < 2) {
			wpa_printf(MSG_DEBUG, "RRM: Truncated element");
			goto out;
		}

		req = (const struct rrm_measurement_request_element *) pos;
		if (req->eid != WLAN_EID_MEASURE_REQUEST) {
			wpa_printf(MSG_DEBUG,
				   "RRM: Expected Measurement Request element, but EID is %u",
				   req->eid);
			goto out;
		}

		if (req->len < 3) {
			wpa_printf(MSG_DEBUG, "RRM: Element length too short");
			goto out;
		}

		if (req->len > len - 2) {
			wpa_printf(MSG_DEBUG, "RRM: Element length too long");
			goto out;
		}

		res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
		if (res < 0)
			goto out;

		pos += req->len + 2;
		len -= req->len + 2;
	}

	return buf;

out:
	wpabuf_free(buf);
	return NULL;
}


void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
					       const u8 *src, const u8 *dst,
					       const u8 *frame, size_t len)
{
	struct wpabuf *report;

	if (wpa_s->wpa_state != WPA_COMPLETED) {
		wpa_printf(MSG_INFO,
			   "RRM: Ignoring radio measurement request: Not associated");
		return;
	}

	if (!wpa_s->rrm.rrm_used) {
		wpa_printf(MSG_INFO,
			   "RRM: Ignoring radio measurement request: Not RRM network");
		return;
	}

	if (len < 3) {
		wpa_printf(MSG_INFO,
			   "RRM: Ignoring too short radio measurement request");
		return;
	}

	wpa_s->rrm.token = *frame;
	os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN);

	/* Number of repetitions is not supported */

	report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
	if (!report)
		return;

	wpas_rrm_send_msr_report(wpa_s, report);
	wpabuf_free(report);
}


void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
					      const u8 *src,
					      const u8 *frame, size_t len,
					      int rssi)
{
	struct wpabuf *buf;
	const struct rrm_link_measurement_request *req;
	struct rrm_link_measurement_report report;

	if (wpa_s->wpa_state != WPA_COMPLETED) {
		wpa_printf(MSG_INFO,
			   "RRM: Ignoring link measurement request. Not associated");
		return;
	}

	if (!wpa_s->rrm.rrm_used) {
		wpa_printf(MSG_INFO,
			   "RRM: Ignoring link measurement request. Not RRM network");
		return;
	}

	if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
		wpa_printf(MSG_INFO,
			   "RRM: Measurement report failed. TX power insertion not supported");
		return;
	}

	req = (const struct rrm_link_measurement_request *) frame;
	if (len < sizeof(*req)) {
		wpa_printf(MSG_INFO,
			   "RRM: Link measurement report failed. Request too short");
		return;
	}

	os_memset(&report, 0, sizeof(report));
	report.dialog_token = req->dialog_token;
	report.tpc.eid = WLAN_EID_TPC_REPORT;
	report.tpc.len = 2;
	/* Note: The driver is expected to update report.tpc.tx_power and
	 * report.tpc.link_margin subfields when sending out this frame.
	 * Similarly, the driver would need to update report.rx_ant_id and
	 * report.tx_ant_id subfields. */
	report.rsni = 255; /* 255 indicates that RSNI is not available */
	report.rcpi = rssi_to_rcpi(rssi);

	/* action_category + action_code */
	buf = wpabuf_alloc(2 + sizeof(report));
	if (buf == NULL) {
		wpa_printf(MSG_ERROR,
			   "RRM: Link measurement report failed. Buffer allocation failed");
		return;
	}

	wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
	wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
	wpabuf_put_data(buf, &report, sizeof(report));
	wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf);

	if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
				wpa_s->own_addr, wpa_s->bssid,
				wpabuf_head(buf), wpabuf_len(buf), 0)) {
		wpa_printf(MSG_ERROR,
			   "RRM: Link measurement report failed. Send action failed");
	}
	wpabuf_free(buf);
}


int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
				 struct wpa_scan_results *scan_res,
				 struct scan_info *info)
{
	size_t i = 0;
	struct wpabuf *buf = NULL;

	if (!wpa_s->beacon_rep_data.token)
		return 0;

	if (!wpa_s->current_bss)
		goto out;

	/* If the measurement was aborted, don't report partial results */
	if (info->aborted)
		goto out;

	wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
		   MAC2STR(info->scan_start_tsf_bssid),
		   MAC2STR(wpa_s->current_bss->bssid));
	if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
	    os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
		      ETH_ALEN) != 0) {
		wpa_printf(MSG_DEBUG,
			   "RRM: Ignore scan results due to mismatching TSF BSSID");
		goto out;
	}

	for (i = 0; i < scan_res->num; i++) {
		struct wpa_bss *bss =
			wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);

		if (!bss)
			continue;

		if ((wpa_s->drv_rrm_flags &
		     WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
		    os_memcmp(scan_res->res[i]->tsf_bssid,
			      wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
			wpa_printf(MSG_DEBUG,
				   "RRM: Ignore scan result for " MACSTR
				   " due to mismatching TSF BSSID" MACSTR,
				   MAC2STR(scan_res->res[i]->bssid),
				   MAC2STR(scan_res->res[i]->tsf_bssid));
			continue;
		}

		/*
		 * Don't report results that were not received during the
		 * current measurement.
		 */
		if (!(wpa_s->drv_rrm_flags &
		      WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
			struct os_reltime update_time, diff;

			/* For now, allow 8 ms older results due to some
			 * unknown issue with cfg80211 BSS table updates during
			 * a scan with the current BSS.
			 * TODO: Fix this more properly to avoid having to have
			 * this type of hacks in place. */
			calculate_update_time(&scan_res->fetch_time,
					      scan_res->res[i]->age,
					      &update_time);
			os_reltime_sub(&wpa_s->beacon_rep_scan,
				       &update_time, &diff);
			if (os_reltime_before(&update_time,
					      &wpa_s->beacon_rep_scan) &&
			    (diff.sec || diff.usec >= 8000)) {
				wpa_printf(MSG_DEBUG,
					   "RRM: Ignore scan result for " MACSTR
					   " due to old update (age(ms) %u, calculated age %u.%06u seconds)",
					   MAC2STR(scan_res->res[i]->bssid),
					   scan_res->res[i]->age,
					   (unsigned int) diff.sec,
					   (unsigned int) diff.usec);
				continue;
			}
		} else if (info->scan_start_tsf >
			   scan_res->res[i]->parent_tsf) {
			continue;
		}

		if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
					scan_res->res[i]->parent_tsf) < 0)
			break;
	}

	if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
		goto out;

	wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);

	wpas_rrm_send_msr_report(wpa_s, buf);
	wpabuf_free(buf);

out:
	wpas_clear_beacon_rep_data(wpa_s);
	return 1;
}


void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
{
	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;

	eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
	bitfield_free(data->eids);
	os_free(data->scan_params.freqs);
	os_memset(data, 0, sizeof(*data));
}