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Enhance get_mode() to return correct hw_mode with 6 GHz support
[thirdparty/hostap.git] / wpa_supplicant / rrm.c
1 /*
2 * wpa_supplicant - Radio Measurements
3 * Copyright (c) 2003-2016, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_common.h"
14 #include "wpa_supplicant_i.h"
15 #include "driver_i.h"
16 #include "bss.h"
17 #include "scan.h"
18 #include "p2p_supplicant.h"
19
20
21 static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx)
22 {
23 struct rrm_data *rrm = data;
24
25 if (!rrm->notify_neighbor_rep) {
26 wpa_printf(MSG_ERROR,
27 "RRM: Unexpected neighbor report timeout");
28 return;
29 }
30
31 wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report - NONE");
32 rrm->notify_neighbor_rep(rrm->neighbor_rep_cb_ctx, NULL);
33
34 rrm->notify_neighbor_rep = NULL;
35 rrm->neighbor_rep_cb_ctx = NULL;
36 }
37
38
39 /*
40 * wpas_rrm_reset - Clear and reset all RRM data in wpa_supplicant
41 * @wpa_s: Pointer to wpa_supplicant
42 */
43 void wpas_rrm_reset(struct wpa_supplicant *wpa_s)
44 {
45 wpa_s->rrm.rrm_used = 0;
46
47 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
48 NULL);
49 if (wpa_s->rrm.notify_neighbor_rep)
50 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
51 wpa_s->rrm.next_neighbor_rep_token = 1;
52 wpas_clear_beacon_rep_data(wpa_s);
53 }
54
55
56 /*
57 * wpas_rrm_process_neighbor_rep - Handle incoming neighbor report
58 * @wpa_s: Pointer to wpa_supplicant
59 * @report: Neighbor report buffer, prefixed by a 1-byte dialog token
60 * @report_len: Length of neighbor report buffer
61 */
62 void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
63 const u8 *report, size_t report_len)
64 {
65 struct wpabuf *neighbor_rep;
66
67 wpa_hexdump(MSG_DEBUG, "RRM: New Neighbor Report", report, report_len);
68 if (report_len < 1)
69 return;
70
71 if (report[0] != wpa_s->rrm.next_neighbor_rep_token - 1) {
72 wpa_printf(MSG_DEBUG,
73 "RRM: Discarding neighbor report with token %d (expected %d)",
74 report[0], wpa_s->rrm.next_neighbor_rep_token - 1);
75 return;
76 }
77
78 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
79 NULL);
80
81 if (!wpa_s->rrm.notify_neighbor_rep) {
82 wpa_msg(wpa_s, MSG_INFO, "RRM: Unexpected neighbor report");
83 return;
84 }
85
86 /* skipping the first byte, which is only an id (dialog token) */
87 neighbor_rep = wpabuf_alloc(report_len - 1);
88 if (!neighbor_rep) {
89 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
90 return;
91 }
92 wpabuf_put_data(neighbor_rep, report + 1, report_len - 1);
93 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: Notifying neighbor report (token = %d)",
94 report[0]);
95 wpa_s->rrm.notify_neighbor_rep(wpa_s->rrm.neighbor_rep_cb_ctx,
96 neighbor_rep);
97 wpa_s->rrm.notify_neighbor_rep = NULL;
98 wpa_s->rrm.neighbor_rep_cb_ctx = NULL;
99 }
100
101
102 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
103 /* Workaround different, undefined for Windows, error codes used here */
104 #ifndef ENOTCONN
105 #define ENOTCONN -1
106 #endif
107 #ifndef EOPNOTSUPP
108 #define EOPNOTSUPP -1
109 #endif
110 #ifndef ECANCELED
111 #define ECANCELED -1
112 #endif
113 #endif
114
115 /* Measurement Request element + Location Subject + Maximum Age subelement */
116 #define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4)
117 /* Measurement Request element + Location Civic Request */
118 #define MEASURE_REQUEST_CIVIC_LEN (3 + 5)
119
120
121 /**
122 * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP
123 * @wpa_s: Pointer to wpa_supplicant
124 * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE
125 * is sent in the request.
126 * @lci: if set, neighbor request will include LCI request
127 * @civic: if set, neighbor request will include civic location request
128 * @cb: Callback function to be called once the requested report arrives, or
129 * timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds.
130 * In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's
131 * the requester's responsibility to free it.
132 * In the latter case NULL will be sent in 'neighbor_rep'.
133 * @cb_ctx: Context value to send the callback function
134 * Returns: 0 in case of success, negative error code otherwise
135 *
136 * In case there is a previous request which has not been answered yet, the
137 * new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT.
138 * Request must contain a callback function.
139 */
140 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
141 const struct wpa_ssid_value *ssid,
142 int lci, int civic,
143 void (*cb)(void *ctx,
144 struct wpabuf *neighbor_rep),
145 void *cb_ctx)
146 {
147 struct wpabuf *buf;
148 const u8 *rrm_ie;
149
150 if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) {
151 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No connection, no RRM.");
152 return -ENOTCONN;
153 }
154
155 if (!wpa_s->rrm.rrm_used) {
156 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No RRM in current connection.");
157 return -EOPNOTSUPP;
158 }
159
160 rrm_ie = wpa_bss_get_ie(wpa_s->current_bss,
161 WLAN_EID_RRM_ENABLED_CAPABILITIES);
162 if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) ||
163 !(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
164 wpa_dbg(wpa_s, MSG_DEBUG,
165 "RRM: No network support for Neighbor Report.");
166 return -EOPNOTSUPP;
167 }
168
169 /* Refuse if there's a live request */
170 if (wpa_s->rrm.notify_neighbor_rep) {
171 wpa_dbg(wpa_s, MSG_DEBUG,
172 "RRM: Currently handling previous Neighbor Report.");
173 return -EBUSY;
174 }
175
176 /* 3 = action category + action code + dialog token */
177 buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) +
178 (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) +
179 (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0));
180 if (buf == NULL) {
181 wpa_dbg(wpa_s, MSG_DEBUG,
182 "RRM: Failed to allocate Neighbor Report Request");
183 return -ENOMEM;
184 }
185
186 wpa_dbg(wpa_s, MSG_DEBUG,
187 "RRM: Neighbor report request (for %s), token=%d",
188 (ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""),
189 wpa_s->rrm.next_neighbor_rep_token);
190
191 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
192 wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST);
193 wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token);
194 if (ssid) {
195 wpabuf_put_u8(buf, WLAN_EID_SSID);
196 wpabuf_put_u8(buf, ssid->ssid_len);
197 wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len);
198 }
199
200 if (lci) {
201 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
202 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
203 wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN);
204
205 /*
206 * Measurement token; nonzero number that is unique among the
207 * Measurement Request elements in a particular frame.
208 */
209 wpabuf_put_u8(buf, 1); /* Measurement Token */
210
211 /*
212 * Parallel, Enable, Request, and Report bits are 0, Duration is
213 * reserved.
214 */
215 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
216 wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */
217
218 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */
219 /* Location Subject */
220 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
221
222 /* Optional Subelements */
223 /*
224 * IEEE P802.11-REVmc/D5.0 Figure 9-170
225 * The Maximum Age subelement is required, otherwise the AP can
226 * send only data that was determined after receiving the
227 * request. Setting it here to unlimited age.
228 */
229 wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE);
230 wpabuf_put_u8(buf, 2);
231 wpabuf_put_le16(buf, 0xffff);
232 }
233
234 if (civic) {
235 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
236 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
237 wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN);
238
239 /*
240 * Measurement token; nonzero number that is unique among the
241 * Measurement Request elements in a particular frame.
242 */
243 wpabuf_put_u8(buf, 2); /* Measurement Token */
244
245 /*
246 * Parallel, Enable, Request, and Report bits are 0, Duration is
247 * reserved.
248 */
249 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
250 /* Measurement Type */
251 wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC);
252
253 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.14:
254 * Location Civic request */
255 /* Location Subject */
256 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
257 wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */
258 /* Location Service Interval Units: Seconds */
259 wpabuf_put_u8(buf, 0);
260 /* Location Service Interval: 0 - Only one report is requested
261 */
262 wpabuf_put_le16(buf, 0);
263 /* No optional subelements */
264 }
265
266 wpa_s->rrm.next_neighbor_rep_token++;
267
268 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
269 wpa_s->own_addr, wpa_s->bssid,
270 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
271 wpa_dbg(wpa_s, MSG_DEBUG,
272 "RRM: Failed to send Neighbor Report Request");
273 wpabuf_free(buf);
274 return -ECANCELED;
275 }
276
277 wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx;
278 wpa_s->rrm.notify_neighbor_rep = cb;
279 eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0,
280 wpas_rrm_neighbor_rep_timeout_handler,
281 &wpa_s->rrm, NULL);
282
283 wpabuf_free(buf);
284 return 0;
285 }
286
287
288 static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type,
289 const u8 *data, size_t data_len)
290 {
291 if (wpabuf_resize(buf, 5 + data_len))
292 return -1;
293
294 wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT);
295 wpabuf_put_u8(*buf, 3 + data_len);
296 wpabuf_put_u8(*buf, token);
297 wpabuf_put_u8(*buf, mode);
298 wpabuf_put_u8(*buf, type);
299
300 if (data_len)
301 wpabuf_put_data(*buf, data, data_len);
302
303 return 0;
304 }
305
306
307 static int
308 wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s,
309 const struct rrm_measurement_request_element *req,
310 struct wpabuf **buf)
311 {
312 u8 subject;
313 u16 max_age = 0;
314 struct os_reltime t, diff;
315 unsigned long diff_l;
316 const u8 *subelem;
317 const u8 *request = req->variable;
318 size_t len = req->len - 3;
319
320 if (len < 1)
321 return -1;
322
323 if (!wpa_s->lci)
324 goto reject;
325
326 subject = *request++;
327 len--;
328
329 wpa_printf(MSG_DEBUG, "Measurement request location subject=%u",
330 subject);
331
332 if (subject != LOCATION_SUBJECT_REMOTE) {
333 wpa_printf(MSG_INFO,
334 "Not building LCI report - bad location subject");
335 return 0;
336 }
337
338 /* Subelements are formatted exactly like elements */
339 wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len);
340 subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE);
341 if (subelem && subelem[1] == 2)
342 max_age = WPA_GET_LE16(subelem + 2);
343
344 if (os_get_reltime(&t))
345 goto reject;
346
347 os_reltime_sub(&t, &wpa_s->lci_time, &diff);
348 /* LCI age is calculated in 10th of a second units. */
349 diff_l = diff.sec * 10 + diff.usec / 100000;
350
351 if (max_age != 0xffff && max_age < diff_l)
352 goto reject;
353
354 if (wpas_rrm_report_elem(buf, req->token,
355 MEASUREMENT_REPORT_MODE_ACCEPT, req->type,
356 wpabuf_head_u8(wpa_s->lci),
357 wpabuf_len(wpa_s->lci)) < 0) {
358 wpa_printf(MSG_DEBUG, "Failed to add LCI report element");
359 return -1;
360 }
361
362 return 0;
363
364 reject:
365 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
366 wpas_rrm_report_elem(buf, req->token,
367 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
368 req->type, NULL, 0) < 0) {
369 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
370 return -1;
371 }
372
373 return 0;
374 }
375
376
377 static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s,
378 const u8 *data, size_t len)
379 {
380 struct wpabuf *report = wpabuf_alloc(len + 3);
381
382 if (!report)
383 return;
384
385 wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT);
386 wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT);
387 wpabuf_put_u8(report, wpa_s->rrm.token);
388
389 wpabuf_put_data(report, data, len);
390
391 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
392 wpa_s->own_addr, wpa_s->bssid,
393 wpabuf_head(report), wpabuf_len(report), 0)) {
394 wpa_printf(MSG_ERROR,
395 "RRM: Radio measurement report failed: Sending Action frame failed");
396 }
397
398 wpabuf_free(report);
399 }
400
401
402 static int wpas_rrm_beacon_rep_update_last_frame(u8 *pos, size_t len)
403 {
404 struct rrm_measurement_report_element *msr_rep;
405 u8 *end = pos + len;
406 u8 *msr_rep_end;
407 struct rrm_measurement_beacon_report *rep = NULL;
408 u8 *subelem;
409
410 /* Find the last beacon report element */
411 while (end - pos >= (int) sizeof(*msr_rep)) {
412 msr_rep = (struct rrm_measurement_report_element *) pos;
413 msr_rep_end = pos + msr_rep->len + 2;
414
415 if (msr_rep->eid != WLAN_EID_MEASURE_REPORT ||
416 msr_rep_end > end) {
417 /* Should not happen. This indicates a bug. */
418 wpa_printf(MSG_ERROR,
419 "RRM: non-measurement report element in measurement report frame");
420 return -1;
421 }
422
423 if (msr_rep->type == MEASURE_TYPE_BEACON)
424 rep = (struct rrm_measurement_beacon_report *)
425 msr_rep->variable;
426
427 pos += pos[1] + 2;
428 }
429
430 if (!rep)
431 return 0;
432
433 subelem = rep->variable;
434 while (subelem + 2 < msr_rep_end &&
435 subelem[0] != WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION)
436 subelem += 2 + subelem[1];
437
438 if (subelem + 2 < msr_rep_end &&
439 subelem[0] == WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION &&
440 subelem[1] == 1 &&
441 subelem + BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN <= end)
442 subelem[2] = 1;
443
444 return 0;
445 }
446
447
448 static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s,
449 struct wpabuf *buf)
450 {
451 int len = wpabuf_len(buf);
452 u8 *pos = wpabuf_mhead_u8(buf), *next = pos;
453
454 #define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3)
455
456 while (len) {
457 int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len;
458
459 if (send_len == len)
460 wpas_rrm_beacon_rep_update_last_frame(pos, len);
461
462 if (send_len == len ||
463 (send_len + next[1] + 2) > MPDU_REPORT_LEN) {
464 wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len);
465 len -= send_len;
466 pos = next;
467 }
468
469 if (len)
470 next += next[1] + 2;
471 }
472 #undef MPDU_REPORT_LEN
473 }
474
475
476 static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels,
477 int *freqs)
478 {
479 size_t i;
480
481 for (i = 0; i < num_primary_channels; i++) {
482 u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4;
483
484 freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan);
485 /* ieee80211_chan_to_freq() is not really meant for this
486 * conversion of 20 MHz primary channel numbers for wider VHT
487 * channels, so handle those as special cases here for now. */
488 if (freqs[i] < 0 &&
489 (op_class == 128 || op_class == 129 || op_class == 130))
490 freqs[i] = 5000 + 5 * primary_chan;
491 if (freqs[i] < 0) {
492 wpa_printf(MSG_DEBUG,
493 "Beacon Report: Invalid channel %u",
494 chan);
495 return -1;
496 }
497 }
498
499 return 0;
500 }
501
502
503 static int * wpas_add_channels(const struct oper_class_map *op,
504 struct hostapd_hw_modes *mode, int active,
505 const u8 *channels, const u8 size)
506 {
507 int *freqs, *next_freq;
508 u8 num_primary_channels, i;
509 u8 num_chans;
510
511 num_chans = channels ? size :
512 (op->max_chan - op->min_chan) / op->inc + 1;
513
514 if (op->bw == BW80 || op->bw == BW80P80)
515 num_primary_channels = 4;
516 else if (op->bw == BW160)
517 num_primary_channels = 8;
518 else
519 num_primary_channels = 1;
520
521 /* one extra place for the zero-terminator */
522 freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs));
523 if (!freqs) {
524 wpa_printf(MSG_ERROR,
525 "Beacon Report: Failed to allocate freqs array");
526 return NULL;
527 }
528
529 next_freq = freqs;
530 for (i = 0; i < num_chans; i++) {
531 u8 chan = channels ? channels[i] : op->min_chan + i * op->inc;
532 enum chan_allowed res = verify_channel(mode, op->op_class, chan,
533 op->bw);
534
535 if (res == NOT_ALLOWED || (res == NO_IR && active))
536 continue;
537
538 if (wpas_add_channel(op->op_class, chan, num_primary_channels,
539 next_freq) < 0) {
540 os_free(freqs);
541 return NULL;
542 }
543
544 next_freq += num_primary_channels;
545 }
546
547 if (!freqs[0]) {
548 os_free(freqs);
549 return NULL;
550 }
551
552 return freqs;
553 }
554
555
556 static int * wpas_op_class_freqs(const struct oper_class_map *op,
557 struct hostapd_hw_modes *mode, int active)
558 {
559 u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 };
560 u8 channels_160mhz[] = { 50, 114 };
561
562 /*
563 * When adding all channels in the operating class, 80 + 80 MHz
564 * operating classes are like 80 MHz channels because we add all valid
565 * channels anyway.
566 */
567 if (op->bw == BW80 || op->bw == BW80P80)
568 return wpas_add_channels(op, mode, active, channels_80mhz,
569 ARRAY_SIZE(channels_80mhz));
570
571 if (op->bw == BW160)
572 return wpas_add_channels(op, mode, active, channels_160mhz,
573 ARRAY_SIZE(channels_160mhz));
574
575 return wpas_add_channels(op, mode, active, NULL, 0);
576 }
577
578
579 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
580 const char *country, const u8 *subelems,
581 size_t len)
582 {
583 int *freqs = NULL, *new_freqs;
584 const u8 *end = subelems + len;
585
586 while (end - subelems > 2) {
587 const struct oper_class_map *op;
588 const u8 *ap_chan_elem, *pos;
589 u8 left;
590 struct hostapd_hw_modes *mode;
591
592 ap_chan_elem = get_ie(subelems, end - subelems,
593 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
594 if (!ap_chan_elem)
595 break;
596 pos = ap_chan_elem + 2;
597 left = ap_chan_elem[1];
598 if (left < 1)
599 break;
600 subelems = ap_chan_elem + 2 + left;
601
602 op = get_oper_class(country, *pos);
603 if (!op) {
604 wpa_printf(MSG_DEBUG,
605 "Beacon request: unknown operating class in AP Channel Report subelement %u",
606 *pos);
607 goto out;
608 }
609 pos++;
610 left--;
611
612 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
613 is_6ghz_op_class(op->op_class));
614 if (!mode)
615 continue;
616
617 /*
618 * For 80 + 80 MHz operating classes, this AP Channel Report
619 * element should be followed by another element specifying
620 * the second 80 MHz channel. For now just add this 80 MHz
621 * channel, the second 80 MHz channel will be added when the
622 * next element is parsed.
623 * TODO: Verify that this AP Channel Report element is followed
624 * by a corresponding AP Channel Report element as specified in
625 * IEEE Std 802.11-2016, 11.11.9.1.
626 */
627 new_freqs = wpas_add_channels(op, mode, active, pos, left);
628 if (new_freqs)
629 int_array_concat(&freqs, new_freqs);
630
631 os_free(new_freqs);
632 }
633
634 return freqs;
635 out:
636 os_free(freqs);
637 return NULL;
638 }
639
640
641 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
642 u8 op_class, u8 chan, int active,
643 const u8 *subelems, size_t len)
644 {
645 int *freqs = NULL, *ext_freqs = NULL;
646 struct hostapd_hw_modes *mode;
647 const char *country = NULL;
648 const struct oper_class_map *op;
649 const u8 *elem;
650
651 if (!wpa_s->current_bss)
652 return NULL;
653 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
654 if (elem && elem[1] >= 2)
655 country = (const char *) (elem + 2);
656
657 op = get_oper_class(country, op_class);
658 if (!op) {
659 wpa_printf(MSG_DEBUG,
660 "Beacon request: invalid operating class %d",
661 op_class);
662 return NULL;
663 }
664
665 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
666 is_6ghz_op_class(op->op_class));
667 if (!mode)
668 return NULL;
669
670 switch (chan) {
671 case 0:
672 freqs = wpas_op_class_freqs(op, mode, active);
673 if (!freqs)
674 return NULL;
675 break;
676 case 255:
677 /* freqs will be added from AP channel subelements */
678 break;
679 default:
680 freqs = wpas_add_channels(op, mode, active, &chan, 1);
681 if (!freqs)
682 return NULL;
683 break;
684 }
685
686 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
687 len);
688 if (ext_freqs) {
689 int_array_concat(&freqs, ext_freqs);
690 os_free(ext_freqs);
691 int_array_sort_unique(freqs);
692 }
693
694 return freqs;
695 }
696
697
698 static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
699 u8 *op_class, u8 *chan, u8 *phy_type)
700 {
701 const u8 *ie;
702 int sec_chan = 0, vht = 0;
703 struct ieee80211_ht_operation *ht_oper = NULL;
704 struct ieee80211_vht_operation *vht_oper = NULL;
705 u8 seg0, seg1;
706
707 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
708 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
709 u8 sec_chan_offset;
710
711 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
712 sec_chan_offset = ht_oper->ht_param &
713 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
714 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
715 sec_chan = 1;
716 else if (sec_chan_offset ==
717 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
718 sec_chan = -1;
719 }
720
721 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
722 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
723 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
724
725 switch (vht_oper->vht_op_info_chwidth) {
726 case 1:
727 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
728 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
729 if (seg1 && abs(seg1 - seg0) == 8)
730 vht = CHANWIDTH_160MHZ;
731 else if (seg1)
732 vht = CHANWIDTH_80P80MHZ;
733 else
734 vht = CHANWIDTH_80MHZ;
735 break;
736 case 2:
737 vht = CHANWIDTH_160MHZ;
738 break;
739 case 3:
740 vht = CHANWIDTH_80P80MHZ;
741 break;
742 default:
743 vht = CHANWIDTH_USE_HT;
744 break;
745 }
746 }
747
748 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
749 chan) == NUM_HOSTAPD_MODES) {
750 wpa_printf(MSG_DEBUG,
751 "Cannot determine operating class and channel");
752 return -1;
753 }
754
755 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
756 vht_oper != NULL);
757 if (*phy_type == PHY_TYPE_UNSPECIFIED) {
758 wpa_printf(MSG_DEBUG, "Cannot determine phy type");
759 return -1;
760 }
761
762 return 0;
763 }
764
765
766 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
767 enum beacon_report_detail detail,
768 struct wpa_bss *bss, u8 *buf,
769 size_t buf_len, u8 **ies_buf,
770 size_t *ie_len, int add_fixed)
771 {
772 u8 *ies = *ies_buf;
773 size_t ies_len = *ie_len;
774 u8 *pos = buf;
775 int rem_len;
776
777 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
778 sizeof(struct rrm_measurement_report_element) - 2 -
779 REPORTED_FRAME_BODY_SUBELEM_LEN;
780
781 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
782 wpa_printf(MSG_DEBUG,
783 "Beacon Request: Invalid reporting detail: %d",
784 detail);
785 return -1;
786 }
787
788 if (detail == BEACON_REPORT_DETAIL_NONE)
789 return 0;
790
791 /*
792 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
793 * beacon interval(2) + capabilities(2) = 14 bytes
794 */
795 if (add_fixed && buf_len < 14)
796 return -1;
797
798 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
799 /* The length will be filled later */
800 pos++;
801
802 if (add_fixed) {
803 WPA_PUT_LE64(pos, bss->tsf);
804 pos += sizeof(bss->tsf);
805 WPA_PUT_LE16(pos, bss->beacon_int);
806 pos += 2;
807 WPA_PUT_LE16(pos, bss->caps);
808 pos += 2;
809 }
810
811 rem_len -= pos - buf;
812
813 /*
814 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
815 * body subelement causes the element to exceed the maximum element
816 * size, the subelement is truncated so that the last IE is a complete
817 * IE. So even when required to report all IEs, add elements one after
818 * the other and stop once there is no more room in the measurement
819 * element.
820 */
821 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
822 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
823 (eids && bitfield_is_set(eids, ies[0]))) {
824 u8 elen = ies[1];
825
826 if (2 + elen > buf + buf_len - pos ||
827 2 + elen > rem_len)
828 break;
829
830 *pos++ = ies[0];
831 *pos++ = elen;
832 os_memcpy(pos, ies + 2, elen);
833 pos += elen;
834 rem_len -= 2 + elen;
835 }
836
837 ies_len -= 2 + ies[1];
838 ies += 2 + ies[1];
839 }
840
841 *ie_len = ies_len;
842 *ies_buf = ies;
843
844 /* Now the length is known */
845 buf[1] = pos - buf - 2;
846 return pos - buf;
847 }
848
849
850 static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data,
851 struct wpa_bss *bss,
852 struct wpabuf **wpa_buf,
853 struct rrm_measurement_beacon_report *rep,
854 u8 **ie, size_t *ie_len, u8 idx)
855 {
856 int ret;
857 u8 *buf, *pos;
858 u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN +
859 (data->last_indication ?
860 BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0);
861
862 /* Maximum element length: Beacon Report element + Reported Frame Body
863 * subelement + all IEs of the reported Beacon frame + Reported Frame
864 * Body Fragment ID subelement */
865 buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len);
866 if (!buf)
867 return -1;
868
869 os_memcpy(buf, rep, sizeof(*rep));
870
871 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
872 bss, buf + sizeof(*rep),
873 14 + *ie_len, ie, ie_len,
874 idx == 0);
875 if (ret < 0)
876 goto out;
877
878 pos = buf + ret + sizeof(*rep);
879 pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID;
880 pos[1] = 2;
881
882 /*
883 * Only one Beacon Report Measurement is supported at a time, so
884 * the Beacon Report ID can always be set to 1.
885 */
886 pos[2] = 1;
887
888 /* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7)
889 */
890 pos[3] = idx;
891 if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len)
892 pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS;
893 else
894 pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS;
895
896 pos += REPORTED_FRAME_BODY_SUBELEM_LEN;
897
898 if (data->last_indication) {
899 pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION;
900 pos[1] = 1;
901
902 /* This field will be updated later if this is the last frame */
903 pos[2] = 0;
904 }
905
906 ret = wpas_rrm_report_elem(wpa_buf, data->token,
907 MEASUREMENT_REPORT_MODE_ACCEPT,
908 MEASURE_TYPE_BEACON, buf,
909 ret + sizeof(*rep) + subelems_len);
910 out:
911 os_free(buf);
912 return ret;
913 }
914
915
916 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
917 struct wpabuf **wpa_buf, struct wpa_bss *bss,
918 u64 start, u64 parent_tsf)
919 {
920 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
921 u8 *ies = (u8 *) (bss + 1);
922 u8 *pos = ies;
923 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
924 struct rrm_measurement_beacon_report rep;
925 u8 idx = 0;
926
927 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
928 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
929 return 0;
930
931 if (data->ssid_len &&
932 (data->ssid_len != bss->ssid_len ||
933 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
934 return 0;
935
936 if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class,
937 &rep.channel, &rep.report_info) < 0)
938 return 0;
939
940 rep.start_time = host_to_le64(start);
941 rep.duration = host_to_le16(data->scan_params.duration);
942 rep.rcpi = rssi_to_rcpi(bss->level);
943 rep.rsni = 255; /* 255 indicates that RSNI is not available */
944 os_memcpy(rep.bssid, bss->bssid, ETH_ALEN);
945 rep.antenna_id = 0; /* unknown */
946 rep.parent_tsf = host_to_le32(parent_tsf);
947
948 do {
949 int ret;
950
951 ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep,
952 &pos, &ies_len, idx++);
953 if (ret)
954 return ret;
955 } while (data->report_detail != BEACON_REPORT_DETAIL_NONE &&
956 ies_len >= 2);
957
958 return 0;
959 }
960
961
962 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
963 struct wpabuf **buf)
964 {
965 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
966 MEASUREMENT_REPORT_MODE_ACCEPT,
967 MEASURE_TYPE_BEACON, NULL, 0);
968 }
969
970
971 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
972 struct wpabuf **buf)
973 {
974 size_t i;
975
976 for (i = 0; i < wpa_s->last_scan_res_used; i++) {
977 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
978 0, 0) < 0)
979 break;
980 }
981
982 if (!(*buf))
983 wpas_beacon_rep_no_results(wpa_s, buf);
984
985 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
986 }
987
988
989 void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
990 {
991 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
992 struct wpabuf *buf = NULL;
993
994 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
995 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
996 MEASURE_TYPE_BEACON, NULL, 0)) {
997 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
998 wpabuf_free(buf);
999 return;
1000 }
1001
1002 wpas_rrm_send_msr_report(wpa_s, buf);
1003 wpabuf_free(buf);
1004 }
1005
1006 wpas_clear_beacon_rep_data(wpa_s);
1007 }
1008
1009
1010 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1011 {
1012 struct wpa_supplicant *wpa_s = eloop_ctx;
1013 struct wpa_driver_scan_params *params =
1014 &wpa_s->beacon_rep_data.scan_params;
1015 u16 prev_duration = params->duration;
1016
1017 if (!wpa_s->current_bss)
1018 return;
1019
1020 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
1021 params->duration) {
1022 wpa_printf(MSG_DEBUG,
1023 "RRM: Cannot set scan duration due to missing driver support");
1024 params->duration = 0;
1025 }
1026 os_get_reltime(&wpa_s->beacon_rep_scan);
1027 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
1028 wpa_supplicant_trigger_scan(wpa_s, params))
1029 wpas_rrm_refuse_request(wpa_s);
1030 params->duration = prev_duration;
1031 }
1032
1033
1034 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
1035 struct beacon_rep_data *data,
1036 u8 sid, u8 slen, const u8 *subelem)
1037 {
1038 u8 report_info, i;
1039
1040 switch (sid) {
1041 case WLAN_BEACON_REQUEST_SUBELEM_SSID:
1042 if (!slen) {
1043 wpa_printf(MSG_DEBUG,
1044 "SSID subelement with zero length - wildcard SSID");
1045 break;
1046 }
1047
1048 if (slen > SSID_MAX_LEN) {
1049 wpa_printf(MSG_DEBUG,
1050 "Invalid SSID subelement length: %u", slen);
1051 return -1;
1052 }
1053
1054 data->ssid_len = slen;
1055 os_memcpy(data->ssid, subelem, data->ssid_len);
1056 break;
1057 case WLAN_BEACON_REQUEST_SUBELEM_INFO:
1058 if (slen != 2) {
1059 wpa_printf(MSG_DEBUG,
1060 "Invalid reporting information subelement length: %u",
1061 slen);
1062 return -1;
1063 }
1064
1065 report_info = subelem[0];
1066 if (report_info != 0) {
1067 wpa_printf(MSG_DEBUG,
1068 "reporting information=%u is not supported",
1069 report_info);
1070 return 0;
1071 }
1072 break;
1073 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
1074 if (slen != 1) {
1075 wpa_printf(MSG_DEBUG,
1076 "Invalid reporting detail subelement length: %u",
1077 slen);
1078 return -1;
1079 }
1080
1081 data->report_detail = subelem[0];
1082 if (data->report_detail >
1083 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
1084 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
1085 subelem[0]);
1086 return -1;
1087 }
1088
1089 break;
1090 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
1091 if (data->report_detail !=
1092 BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
1093 wpa_printf(MSG_DEBUG,
1094 "Beacon request: request subelement is present but report detail is %u",
1095 data->report_detail);
1096 return -1;
1097 }
1098
1099 if (!slen) {
1100 wpa_printf(MSG_DEBUG,
1101 "Invalid request subelement length: %u",
1102 slen);
1103 return -1;
1104 }
1105
1106 if (data->eids) {
1107 wpa_printf(MSG_DEBUG,
1108 "Beacon Request: Request subelement appears more than once");
1109 return -1;
1110 }
1111
1112 data->eids = bitfield_alloc(255);
1113 if (!data->eids) {
1114 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
1115 return -1;
1116 }
1117
1118 for (i = 0; i < slen; i++)
1119 bitfield_set(data->eids, subelem[i]);
1120 break;
1121 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
1122 /* Skip - it will be processed when freqs are added */
1123 break;
1124 case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION:
1125 if (slen != 1) {
1126 wpa_printf(MSG_DEBUG,
1127 "Beacon request: Invalid last indication request subelement length: %u",
1128 slen);
1129 return -1;
1130 }
1131
1132 data->last_indication = subelem[0];
1133 break;
1134 default:
1135 wpa_printf(MSG_DEBUG,
1136 "Beacon request: Unknown subelement id %u", sid);
1137 break;
1138 }
1139
1140 return 1;
1141 }
1142
1143
1144 /**
1145 * Returns 0 if the next element can be processed, 1 if some operation was
1146 * triggered, and -1 if processing failed (i.e., the element is in invalid
1147 * format or an internal error occurred).
1148 */
1149 static int
1150 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
1151 u8 elem_token, int duration_mandatory,
1152 const struct rrm_measurement_beacon_request *req,
1153 size_t len, struct wpabuf **buf)
1154 {
1155 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1156 struct wpa_driver_scan_params *params = &data->scan_params;
1157 const u8 *subelems;
1158 size_t elems_len;
1159 u16 rand_interval;
1160 u32 interval_usec;
1161 u32 _rand;
1162 int ret = 0, res;
1163 u8 reject_mode;
1164
1165 if (len < sizeof(*req))
1166 return -1;
1167
1168 if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
1169 req->mode != BEACON_REPORT_MODE_ACTIVE &&
1170 req->mode != BEACON_REPORT_MODE_TABLE)
1171 return 0;
1172
1173 subelems = req->variable;
1174 elems_len = len - sizeof(*req);
1175 rand_interval = le_to_host16(req->rand_interval);
1176
1177 os_free(params->freqs);
1178 os_memset(params, 0, sizeof(*params));
1179
1180 data->token = elem_token;
1181
1182 /* default reporting detail is all fixed length fields and all
1183 * elements */
1184 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
1185 os_memcpy(data->bssid, req->bssid, ETH_ALEN);
1186
1187 while (elems_len >= 2) {
1188 if (subelems[1] > elems_len - 2) {
1189 wpa_printf(MSG_DEBUG,
1190 "Beacon Request: Truncated subelement");
1191 ret = -1;
1192 goto out;
1193 }
1194
1195 res = wpas_rm_handle_beacon_req_subelem(
1196 wpa_s, data, subelems[0], subelems[1], &subelems[2]);
1197 if (res < 0) {
1198 ret = res;
1199 goto out;
1200 } else if (!res) {
1201 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE;
1202 goto out_reject;
1203 }
1204
1205 elems_len -= 2 + subelems[1];
1206 subelems += 2 + subelems[1];
1207 }
1208
1209 if (req->mode == BEACON_REPORT_MODE_TABLE) {
1210 wpas_beacon_rep_table(wpa_s, buf);
1211 goto out;
1212 }
1213
1214 params->freqs = wpas_beacon_request_freqs(
1215 wpa_s, req->oper_class, req->channel,
1216 req->mode == BEACON_REPORT_MODE_ACTIVE,
1217 req->variable, len - sizeof(*req));
1218 if (!params->freqs) {
1219 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
1220 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED;
1221 goto out_reject;
1222 }
1223
1224 params->duration = le_to_host16(req->duration);
1225 params->duration_mandatory = duration_mandatory;
1226 if (!params->duration) {
1227 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
1228 ret = -1;
1229 goto out;
1230 }
1231
1232 params->only_new_results = 1;
1233
1234 if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
1235 params->ssids[params->num_ssids].ssid = data->ssid;
1236 params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
1237 }
1238
1239 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
1240 _rand = os_random();
1241 interval_usec = (_rand % (rand_interval + 1)) * 1024;
1242 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
1243 NULL);
1244 return 1;
1245 out_reject:
1246 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1247 wpas_rrm_report_elem(buf, elem_token, reject_mode,
1248 MEASURE_TYPE_BEACON, NULL, 0) < 0) {
1249 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1250 ret = -1;
1251 }
1252 out:
1253 wpas_clear_beacon_rep_data(wpa_s);
1254 return ret;
1255 }
1256
1257
1258 static int
1259 wpas_rrm_handle_msr_req_element(
1260 struct wpa_supplicant *wpa_s,
1261 const struct rrm_measurement_request_element *req,
1262 struct wpabuf **buf)
1263 {
1264 int duration_mandatory;
1265
1266 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
1267 req->type, req->token);
1268
1269 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
1270 /* Enable bit is not supported for now */
1271 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
1272 return 0;
1273 }
1274
1275 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
1276 req->type > MEASURE_TYPE_RPI_HIST) {
1277 /* Parallel measurements are not supported for now */
1278 wpa_printf(MSG_DEBUG,
1279 "RRM: Parallel measurements are not supported, reject");
1280 goto reject;
1281 }
1282
1283 duration_mandatory =
1284 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
1285
1286 switch (req->type) {
1287 case MEASURE_TYPE_LCI:
1288 return wpas_rrm_build_lci_report(wpa_s, req, buf);
1289 case MEASURE_TYPE_BEACON:
1290 if (duration_mandatory &&
1291 !(wpa_s->drv_rrm_flags &
1292 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
1293 wpa_printf(MSG_DEBUG,
1294 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
1295 goto reject;
1296 }
1297 return wpas_rm_handle_beacon_req(wpa_s, req->token,
1298 duration_mandatory,
1299 (const void *) req->variable,
1300 req->len - 3, buf);
1301 default:
1302 wpa_printf(MSG_INFO,
1303 "RRM: Unsupported radio measurement type %u",
1304 req->type);
1305 break;
1306 }
1307
1308 reject:
1309 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1310 wpas_rrm_report_elem(buf, req->token,
1311 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
1312 req->type, NULL, 0) < 0) {
1313 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1314 return -1;
1315 }
1316
1317 return 0;
1318 }
1319
1320
1321 static struct wpabuf *
1322 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
1323 size_t len)
1324 {
1325 struct wpabuf *buf = NULL;
1326
1327 while (len) {
1328 const struct rrm_measurement_request_element *req;
1329 int res;
1330
1331 if (len < 2) {
1332 wpa_printf(MSG_DEBUG, "RRM: Truncated element");
1333 goto out;
1334 }
1335
1336 req = (const struct rrm_measurement_request_element *) pos;
1337 if (req->eid != WLAN_EID_MEASURE_REQUEST) {
1338 wpa_printf(MSG_DEBUG,
1339 "RRM: Expected Measurement Request element, but EID is %u",
1340 req->eid);
1341 goto out;
1342 }
1343
1344 if (req->len < 3) {
1345 wpa_printf(MSG_DEBUG, "RRM: Element length too short");
1346 goto out;
1347 }
1348
1349 if (req->len > len - 2) {
1350 wpa_printf(MSG_DEBUG, "RRM: Element length too long");
1351 goto out;
1352 }
1353
1354 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
1355 if (res < 0)
1356 goto out;
1357
1358 pos += req->len + 2;
1359 len -= req->len + 2;
1360 }
1361
1362 return buf;
1363
1364 out:
1365 wpabuf_free(buf);
1366 return NULL;
1367 }
1368
1369
1370 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
1371 const u8 *src, const u8 *dst,
1372 const u8 *frame, size_t len)
1373 {
1374 struct wpabuf *report;
1375
1376 if (wpa_s->wpa_state != WPA_COMPLETED) {
1377 wpa_printf(MSG_INFO,
1378 "RRM: Ignoring radio measurement request: Not associated");
1379 return;
1380 }
1381
1382 if (!wpa_s->rrm.rrm_used) {
1383 wpa_printf(MSG_INFO,
1384 "RRM: Ignoring radio measurement request: Not RRM network");
1385 return;
1386 }
1387
1388 if (len < 3) {
1389 wpa_printf(MSG_INFO,
1390 "RRM: Ignoring too short radio measurement request");
1391 return;
1392 }
1393
1394 wpa_s->rrm.token = *frame;
1395 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN);
1396
1397 /* Number of repetitions is not supported */
1398
1399 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
1400 if (!report)
1401 return;
1402
1403 wpas_rrm_send_msr_report(wpa_s, report);
1404 wpabuf_free(report);
1405 }
1406
1407
1408 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
1409 const u8 *src,
1410 const u8 *frame, size_t len,
1411 int rssi)
1412 {
1413 struct wpabuf *buf;
1414 const struct rrm_link_measurement_request *req;
1415 struct rrm_link_measurement_report report;
1416
1417 if (wpa_s->wpa_state != WPA_COMPLETED) {
1418 wpa_printf(MSG_INFO,
1419 "RRM: Ignoring link measurement request. Not associated");
1420 return;
1421 }
1422
1423 if (!wpa_s->rrm.rrm_used) {
1424 wpa_printf(MSG_INFO,
1425 "RRM: Ignoring link measurement request. Not RRM network");
1426 return;
1427 }
1428
1429 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
1430 wpa_printf(MSG_INFO,
1431 "RRM: Measurement report failed. TX power insertion not supported");
1432 return;
1433 }
1434
1435 req = (const struct rrm_link_measurement_request *) frame;
1436 if (len < sizeof(*req)) {
1437 wpa_printf(MSG_INFO,
1438 "RRM: Link measurement report failed. Request too short");
1439 return;
1440 }
1441
1442 os_memset(&report, 0, sizeof(report));
1443 report.dialog_token = req->dialog_token;
1444 report.tpc.eid = WLAN_EID_TPC_REPORT;
1445 report.tpc.len = 2;
1446 /* Note: The driver is expected to update report.tpc.tx_power and
1447 * report.tpc.link_margin subfields when sending out this frame.
1448 * Similarly, the driver would need to update report.rx_ant_id and
1449 * report.tx_ant_id subfields. */
1450 report.rsni = 255; /* 255 indicates that RSNI is not available */
1451 report.rcpi = rssi_to_rcpi(rssi);
1452
1453 /* action_category + action_code */
1454 buf = wpabuf_alloc(2 + sizeof(report));
1455 if (buf == NULL) {
1456 wpa_printf(MSG_ERROR,
1457 "RRM: Link measurement report failed. Buffer allocation failed");
1458 return;
1459 }
1460
1461 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
1462 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
1463 wpabuf_put_data(buf, &report, sizeof(report));
1464 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf);
1465
1466 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
1467 wpa_s->own_addr, wpa_s->bssid,
1468 wpabuf_head(buf), wpabuf_len(buf), 0)) {
1469 wpa_printf(MSG_ERROR,
1470 "RRM: Link measurement report failed. Send action failed");
1471 }
1472 wpabuf_free(buf);
1473 }
1474
1475
1476 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
1477 struct wpa_scan_results *scan_res,
1478 struct scan_info *info)
1479 {
1480 size_t i = 0;
1481 struct wpabuf *buf = NULL;
1482
1483 if (!wpa_s->beacon_rep_data.token)
1484 return 0;
1485
1486 if (!wpa_s->current_bss)
1487 goto out;
1488
1489 /* If the measurement was aborted, don't report partial results */
1490 if (info->aborted)
1491 goto out;
1492
1493 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
1494 MAC2STR(info->scan_start_tsf_bssid),
1495 MAC2STR(wpa_s->current_bss->bssid));
1496 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1497 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
1498 ETH_ALEN) != 0) {
1499 wpa_printf(MSG_DEBUG,
1500 "RRM: Ignore scan results due to mismatching TSF BSSID");
1501 goto out;
1502 }
1503
1504 for (i = 0; i < scan_res->num; i++) {
1505 struct wpa_bss *bss =
1506 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
1507
1508 if (!bss)
1509 continue;
1510
1511 if ((wpa_s->drv_rrm_flags &
1512 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1513 os_memcmp(scan_res->res[i]->tsf_bssid,
1514 wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
1515 wpa_printf(MSG_DEBUG,
1516 "RRM: Ignore scan result for " MACSTR
1517 " due to mismatching TSF BSSID" MACSTR,
1518 MAC2STR(scan_res->res[i]->bssid),
1519 MAC2STR(scan_res->res[i]->tsf_bssid));
1520 continue;
1521 }
1522
1523 /*
1524 * Don't report results that were not received during the
1525 * current measurement.
1526 */
1527 if (!(wpa_s->drv_rrm_flags &
1528 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
1529 struct os_reltime update_time, diff;
1530
1531 /* For now, allow 8 ms older results due to some
1532 * unknown issue with cfg80211 BSS table updates during
1533 * a scan with the current BSS.
1534 * TODO: Fix this more properly to avoid having to have
1535 * this type of hacks in place. */
1536 calculate_update_time(&scan_res->fetch_time,
1537 scan_res->res[i]->age,
1538 &update_time);
1539 os_reltime_sub(&wpa_s->beacon_rep_scan,
1540 &update_time, &diff);
1541 if (os_reltime_before(&update_time,
1542 &wpa_s->beacon_rep_scan) &&
1543 (diff.sec || diff.usec >= 8000)) {
1544 wpa_printf(MSG_DEBUG,
1545 "RRM: Ignore scan result for " MACSTR
1546 " due to old update (age(ms) %u, calculated age %u.%06u seconds)",
1547 MAC2STR(scan_res->res[i]->bssid),
1548 scan_res->res[i]->age,
1549 (unsigned int) diff.sec,
1550 (unsigned int) diff.usec);
1551 continue;
1552 }
1553 } else if (info->scan_start_tsf >
1554 scan_res->res[i]->parent_tsf) {
1555 continue;
1556 }
1557
1558 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
1559 scan_res->res[i]->parent_tsf) < 0)
1560 break;
1561 }
1562
1563 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
1564 goto out;
1565
1566 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
1567
1568 wpas_rrm_send_msr_report(wpa_s, buf);
1569 wpabuf_free(buf);
1570
1571 out:
1572 wpas_clear_beacon_rep_data(wpa_s);
1573 return 1;
1574 }
1575
1576
1577 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
1578 {
1579 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1580
1581 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
1582 bitfield_free(data->eids);
1583 os_free(data->scan_params.freqs);
1584 os_memset(data, 0, sizeof(*data));
1585 }
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