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
wpas_rrm_neighbor_rep_timeout_handler(void * data,void * user_ctx)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 */
wpas_rrm_reset(struct wpa_supplicant * wpa_s)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 */
wpas_rrm_process_neighbor_rep(struct wpa_supplicant * wpa_s,const u8 * report,size_t report_len)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_printf(MSG_ERROR, "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_printf(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 #define ENOTCONN -1
105 #define EOPNOTSUPP -1
106 #define ECANCELED -1
107 #endif
108
109 /* Measurement Request element + Location Subject + Maximum Age subelement */
110 #define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4)
111 /* Measurement Request element + Location Civic Request */
112 #define MEASURE_REQUEST_CIVIC_LEN (3 + 5)
113
114
115 /**
116 * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP
117 * @wpa_s: Pointer to wpa_supplicant
118 * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE
119 * is sent in the request.
120 * @lci: if set, neighbor request will include LCI request
121 * @civic: if set, neighbor request will include civic location request
122 * @cb: Callback function to be called once the requested report arrives, or
123 * timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds.
124 * In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's
125 * the requester's responsibility to free it.
126 * In the latter case NULL will be sent in 'neighbor_rep'.
127 * @cb_ctx: Context value to send the callback function
128 * Returns: 0 in case of success, negative error code otherwise
129 *
130 * In case there is a previous request which has not been answered yet, the
131 * new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT.
132 * Request must contain a callback function.
133 */
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)134 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
135 const struct wpa_ssid_value *ssid,
136 int lci, int civic,
137 void (*cb)(void *ctx,
138 struct wpabuf *neighbor_rep),
139 void *cb_ctx)
140 {
141 struct wpabuf *buf;
142 const u8 *rrm_ie;
143
144 if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) {
145 wpa_printf(MSG_DEBUG, "RRM: No connection, no RRM.");
146 return -ENOTCONN;
147 }
148
149 if (!wpa_s->rrm.rrm_used) {
150 wpa_printf(MSG_DEBUG, "RRM: No RRM in current connection.");
151 return -EOPNOTSUPP;
152 }
153
154 rrm_ie = wpa_bss_get_ie(wpa_s->current_bss,
155 WLAN_EID_RRM_ENABLED_CAPABILITIES);
156 if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) ||
157 !(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
158 wpa_printf(MSG_DEBUG,
159 "RRM: No network support for Neighbor Report.");
160 return -EOPNOTSUPP;
161 }
162
163 /* Refuse if there's a live request */
164 if (wpa_s->rrm.notify_neighbor_rep) {
165 wpa_printf(MSG_DEBUG,
166 "RRM: Currently handling previous Neighbor Report.");
167 return -EBUSY;
168 }
169
170 /* 3 = action category + action code + dialog token */
171 buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) +
172 (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) +
173 (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0));
174 if (buf == NULL) {
175 wpa_printf(MSG_DEBUG,
176 "RRM: Failed to allocate Neighbor Report Request");
177 return -ENOMEM;
178 }
179
180 wpa_printf(MSG_DEBUG, "RRM: Neighbor report request (for %s), token=%d",
181 (ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""),
182 wpa_s->rrm.next_neighbor_rep_token);
183
184 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
185 wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST);
186 wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token);
187 if (ssid) {
188 wpabuf_put_u8(buf, WLAN_EID_SSID);
189 wpabuf_put_u8(buf, ssid->ssid_len);
190 wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len);
191 }
192
193 if (lci) {
194 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
195 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
196 wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN);
197
198 /*
199 * Measurement token; nonzero number that is unique among the
200 * Measurement Request elements in a particular frame.
201 */
202 wpabuf_put_u8(buf, 1); /* Measurement Token */
203
204 /*
205 * Parallel, Enable, Request, and Report bits are 0, Duration is
206 * reserved.
207 */
208 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
209 wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */
210
211 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */
212 /* Location Subject */
213 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
214
215 /* Optional Subelements */
216 /*
217 * IEEE P802.11-REVmc/D5.0 Figure 9-170
218 * The Maximum Age subelement is required, otherwise the AP can
219 * send only data that was determined after receiving the
220 * request. Setting it here to unlimited age.
221 */
222 wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE);
223 wpabuf_put_u8(buf, 2);
224 wpabuf_put_le16(buf, 0xffff);
225 }
226
227 if (civic) {
228 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
229 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
230 wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN);
231
232 /*
233 * Measurement token; nonzero number that is unique among the
234 * Measurement Request elements in a particular frame.
235 */
236 wpabuf_put_u8(buf, 2); /* Measurement Token */
237
238 /*
239 * Parallel, Enable, Request, and Report bits are 0, Duration is
240 * reserved.
241 */
242 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
243 /* Measurement Type */
244 wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC);
245
246 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.14:
247 * Location Civic request */
248 /* Location Subject */
249 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
250 wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */
251 /* Location Service Interval Units: Seconds */
252 wpabuf_put_u8(buf, 0);
253 /* Location Service Interval: 0 - Only one report is requested
254 */
255 wpabuf_put_le16(buf, 0);
256 /* No optional subelements */
257 }
258
259 wpa_s->rrm.next_neighbor_rep_token++;
260
261 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
262 wpa_s->own_addr, wpa_s->bssid,
263 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
264 wpa_printf(MSG_DEBUG,
265 "RRM: Failed to send Neighbor Report Request");
266 wpabuf_free(buf);
267 return -ECANCELED;
268 }
269
270 wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx;
271 wpa_s->rrm.notify_neighbor_rep = cb;
272 eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0,
273 wpas_rrm_neighbor_rep_timeout_handler,
274 &wpa_s->rrm, NULL);
275
276 wpabuf_free(buf);
277 return 0;
278 }
279
280
wpas_rrm_report_elem(struct wpabuf ** buf,u8 token,u8 mode,u8 type,const u8 * data,size_t data_len)281 static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type,
282 const u8 *data, size_t data_len)
283 {
284 if (wpabuf_resize(buf, 5 + data_len))
285 return -1;
286
287 wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT);
288 wpabuf_put_u8(*buf, 3 + data_len);
289 wpabuf_put_u8(*buf, token);
290 wpabuf_put_u8(*buf, mode);
291 wpabuf_put_u8(*buf, type);
292
293 if (data_len)
294 wpabuf_put_data(*buf, data, data_len);
295
296 return 0;
297 }
298
299
300 static int
wpas_rrm_build_lci_report(struct wpa_supplicant * wpa_s,const struct rrm_measurement_request_element * req,struct wpabuf ** buf)301 wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s,
302 const struct rrm_measurement_request_element *req,
303 struct wpabuf **buf)
304 {
305 u8 subject;
306 u16 max_age = 0;
307 struct os_reltime t, diff;
308 unsigned long diff_l;
309 const u8 *subelem;
310 const u8 *request = req->variable;
311 size_t len = req->len - 3;
312
313 if (len < 1)
314 return -1;
315
316 if (!wpa_s->lci)
317 goto reject;
318
319 subject = *request++;
320 len--;
321
322 wpa_printf(MSG_DEBUG, "Measurement request location subject=%u",
323 subject);
324
325 if (subject != LOCATION_SUBJECT_REMOTE) {
326 wpa_printf(MSG_INFO,
327 "Not building LCI report - bad location subject");
328 return 0;
329 }
330
331 /* Subelements are formatted exactly like elements */
332 wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len);
333 subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE);
334 if (subelem && subelem[1] == 2)
335 max_age = WPA_GET_LE16(subelem + 2);
336
337 if (os_get_reltime(&t))
338 goto reject;
339
340 os_reltime_sub(&t, &wpa_s->lci_time, &diff);
341 /* LCI age is calculated in 10th of a second units. */
342 diff_l = diff.sec * 10 + diff.usec / 100000;
343
344 if (max_age != 0xffff && max_age < diff_l)
345 goto reject;
346
347 if (wpas_rrm_report_elem(buf, req->token,
348 MEASUREMENT_REPORT_MODE_ACCEPT, req->type,
349 wpabuf_head_u8(wpa_s->lci),
350 wpabuf_len(wpa_s->lci)) < 0) {
351 wpa_printf(MSG_DEBUG, "Failed to add LCI report element");
352 return -1;
353 }
354
355 return 0;
356
357 reject:
358 if (wpas_rrm_report_elem(buf, req->token,
359 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
360 req->type, NULL, 0) < 0) {
361 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
362 return -1;
363 }
364
365 return 0;
366 }
367
368
wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant * wpa_s,const u8 * data,size_t len)369 static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s,
370 const u8 *data, size_t len)
371 {
372 struct wpabuf *report = wpabuf_alloc(len + 3);
373
374 if (!report)
375 return;
376
377 wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT);
378 wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT);
379 wpabuf_put_u8(report, wpa_s->rrm.token);
380
381 wpabuf_put_data(report, data, len);
382
383 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
384 wpa_s->own_addr, wpa_s->bssid,
385 wpabuf_head(report), wpabuf_len(report), 0)) {
386 wpa_printf(MSG_ERROR,
387 "RRM: Radio measurement report failed: Sending Action frame failed");
388 }
389
390 wpabuf_free(report);
391 }
392
393
wpas_rrm_send_msr_report(struct wpa_supplicant * wpa_s,struct wpabuf * buf)394 static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s,
395 struct wpabuf *buf)
396 {
397 int len = wpabuf_len(buf);
398 const u8 *pos = wpabuf_head_u8(buf), *next = pos;
399
400 #define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3)
401
402 while (len) {
403 int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len;
404
405 if (send_len == len ||
406 (send_len + next[1] + 2) > MPDU_REPORT_LEN) {
407 wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len);
408 len -= send_len;
409 pos = next;
410 }
411
412 next += next[1] + 2;
413 }
414 #undef MPDU_REPORT_LEN
415 }
416
417
wpas_add_channel(u8 op_class,u8 chan,u8 num_primary_channels,int * freqs)418 static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels,
419 int *freqs)
420 {
421 size_t i;
422
423 for (i = 0; i < num_primary_channels; i++) {
424 u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4;
425
426 freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan);
427 /* ieee80211_chan_to_freq() is not really meant for this
428 * conversion of 20 MHz primary channel numbers for wider VHT
429 * channels, so handle those as special cases here for now. */
430 if (freqs[i] < 0 &&
431 (op_class == 128 || op_class == 129 || op_class == 130))
432 freqs[i] = 5000 + 5 * primary_chan;
433 if (freqs[i] < 0) {
434 wpa_printf(MSG_DEBUG,
435 "Beacon Report: Invalid channel %u",
436 chan);
437 return -1;
438 }
439 }
440
441 return 0;
442 }
443
444
wpas_add_channels(const struct oper_class_map * op,struct hostapd_hw_modes * mode,int active,const u8 * channels,const u8 size)445 static int * wpas_add_channels(const struct oper_class_map *op,
446 struct hostapd_hw_modes *mode, int active,
447 const u8 *channels, const u8 size)
448 {
449 int *freqs, *next_freq;
450 u8 num_primary_channels, i;
451 u8 num_chans;
452
453 num_chans = channels ? size :
454 (op->max_chan - op->min_chan) / op->inc + 1;
455
456 if (op->bw == BW80 || op->bw == BW80P80)
457 num_primary_channels = 4;
458 else if (op->bw == BW160)
459 num_primary_channels = 8;
460 else
461 num_primary_channels = 1;
462
463 /* one extra place for the zero-terminator */
464 freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs));
465 if (!freqs) {
466 wpa_printf(MSG_ERROR,
467 "Beacon Report: Failed to allocate freqs array");
468 return NULL;
469 }
470
471 next_freq = freqs;
472 for (i = 0; i < num_chans; i++) {
473 u8 chan = channels ? channels[i] : op->min_chan + i * op->inc;
474 enum chan_allowed res = verify_channel(mode, chan, op->bw);
475
476 if (res == NOT_ALLOWED || (res == NO_IR && active))
477 continue;
478
479 if (wpas_add_channel(op->op_class, chan, num_primary_channels,
480 next_freq) < 0) {
481 os_free(freqs);
482 return NULL;
483 }
484
485 next_freq += num_primary_channels;
486 }
487
488 if (!freqs[0]) {
489 os_free(freqs);
490 return NULL;
491 }
492
493 return freqs;
494 }
495
496
wpas_op_class_freqs(const struct oper_class_map * op,struct hostapd_hw_modes * mode,int active)497 static int * wpas_op_class_freqs(const struct oper_class_map *op,
498 struct hostapd_hw_modes *mode, int active)
499 {
500 u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 };
501 u8 channels_160mhz[] = { 50, 114 };
502
503 /*
504 * When adding all channels in the operating class, 80 + 80 MHz
505 * operating classes are like 80 MHz channels because we add all valid
506 * channels anyway.
507 */
508 if (op->bw == BW80 || op->bw == BW80P80)
509 return wpas_add_channels(op, mode, active, channels_80mhz,
510 ARRAY_SIZE(channels_80mhz));
511
512 if (op->bw == BW160)
513 return wpas_add_channels(op, mode, active, channels_160mhz,
514 ARRAY_SIZE(channels_160mhz));
515
516 return wpas_add_channels(op, mode, active, NULL, 0);
517 }
518
519
wpas_channel_report_freqs(struct wpa_supplicant * wpa_s,int active,const char * country,const u8 * subelems,size_t len)520 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
521 const char *country, const u8 *subelems,
522 size_t len)
523 {
524 int *freqs = NULL, *new_freqs;
525 const u8 *end = subelems + len;
526
527 while (end - subelems > 2) {
528 const struct oper_class_map *op;
529 const u8 *ap_chan_elem, *pos;
530 u8 left;
531 struct hostapd_hw_modes *mode;
532
533 ap_chan_elem = get_ie(subelems, end - subelems,
534 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
535 if (!ap_chan_elem)
536 break;
537 pos = ap_chan_elem + 2;
538 left = ap_chan_elem[1];
539 if (left < 1)
540 break;
541 subelems = ap_chan_elem + 2 + left;
542
543 op = get_oper_class(country, *pos);
544 if (!op) {
545 wpa_printf(MSG_DEBUG,
546 "Beacon request: unknown operating class in AP Channel Report subelement %u",
547 *pos);
548 goto out;
549 }
550 pos++;
551 left--;
552
553 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
554 if (!mode)
555 continue;
556
557 /*
558 * For 80 + 80 MHz operating classes, this AP Channel Report
559 * element should be followed by another element specifying
560 * the second 80 MHz channel. For now just add this 80 MHz
561 * channel, the second 80 MHz channel will be added when the
562 * next element is parsed.
563 * TODO: Verify that this AP Channel Report element is followed
564 * by a corresponding AP Channel Report element as specified in
565 * IEEE Std 802.11-2016, 11.11.9.1.
566 */
567 new_freqs = wpas_add_channels(op, mode, active, pos, left);
568 if (new_freqs)
569 int_array_concat(&freqs, new_freqs);
570
571 os_free(new_freqs);
572 }
573
574 return freqs;
575 out:
576 os_free(freqs);
577 return NULL;
578 }
579
580
wpas_beacon_request_freqs(struct wpa_supplicant * wpa_s,u8 op_class,u8 chan,int active,const u8 * subelems,size_t len)581 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
582 u8 op_class, u8 chan, int active,
583 const u8 *subelems, size_t len)
584 {
585 int *freqs = NULL, *ext_freqs = NULL;
586 struct hostapd_hw_modes *mode;
587 const char *country = NULL;
588 const struct oper_class_map *op;
589 const u8 *elem;
590
591 if (!wpa_s->current_bss)
592 return NULL;
593 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
594 if (elem && elem[1] >= 2)
595 country = (const char *) (elem + 2);
596
597 op = get_oper_class(country, op_class);
598 if (!op) {
599 wpa_printf(MSG_DEBUG,
600 "Beacon request: invalid operating class %d",
601 op_class);
602 return NULL;
603 }
604
605 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
606 if (!mode)
607 return NULL;
608
609 switch (chan) {
610 case 0:
611 freqs = wpas_op_class_freqs(op, mode, active);
612 if (!freqs)
613 return NULL;
614 break;
615 case 255:
616 /* freqs will be added from AP channel subelements */
617 break;
618 default:
619 freqs = wpas_add_channels(op, mode, active, &chan, 1);
620 if (!freqs)
621 return NULL;
622 break;
623 }
624
625 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
626 len);
627 if (ext_freqs) {
628 int_array_concat(&freqs, ext_freqs);
629 os_free(ext_freqs);
630 }
631
632 return freqs;
633 }
634
635
wpas_get_op_chan_phy(int freq,const u8 * ies,size_t ies_len,u8 * op_class,u8 * chan,u8 * phy_type)636 static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
637 u8 *op_class, u8 *chan, u8 *phy_type)
638 {
639 const u8 *ie;
640 int sec_chan = 0, vht = 0;
641 struct ieee80211_ht_operation *ht_oper = NULL;
642 struct ieee80211_vht_operation *vht_oper = NULL;
643 u8 seg0, seg1;
644
645 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
646 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
647 u8 sec_chan_offset;
648
649 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
650 sec_chan_offset = ht_oper->ht_param &
651 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
652 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
653 sec_chan = 1;
654 else if (sec_chan_offset ==
655 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
656 sec_chan = -1;
657 }
658
659 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
660 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
661 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
662
663 switch (vht_oper->vht_op_info_chwidth) {
664 case 1:
665 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
666 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
667 if (seg1 && abs(seg1 - seg0) == 8)
668 vht = VHT_CHANWIDTH_160MHZ;
669 else if (seg1)
670 vht = VHT_CHANWIDTH_80P80MHZ;
671 else
672 vht = VHT_CHANWIDTH_80MHZ;
673 break;
674 case 2:
675 vht = VHT_CHANWIDTH_160MHZ;
676 break;
677 case 3:
678 vht = VHT_CHANWIDTH_80P80MHZ;
679 break;
680 default:
681 vht = VHT_CHANWIDTH_USE_HT;
682 break;
683 }
684 }
685
686 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
687 chan) == NUM_HOSTAPD_MODES) {
688 wpa_printf(MSG_DEBUG,
689 "Cannot determine operating class and channel");
690 return -1;
691 }
692
693 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
694 vht_oper != NULL);
695 if (*phy_type == PHY_TYPE_UNSPECIFIED) {
696 wpa_printf(MSG_DEBUG, "Cannot determine phy type");
697 return -1;
698 }
699
700 return 0;
701 }
702
703
wpas_beacon_rep_add_frame_body(struct bitfield * eids,enum beacon_report_detail detail,struct wpa_bss * bss,u8 * buf,size_t buf_len)704 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
705 enum beacon_report_detail detail,
706 struct wpa_bss *bss, u8 *buf,
707 size_t buf_len)
708 {
709 u8 *ies = (u8 *) (bss + 1);
710 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
711 u8 *pos = buf;
712 int rem_len;
713
714 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
715 sizeof(struct rrm_measurement_report_element) - 2;
716
717 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
718 wpa_printf(MSG_DEBUG,
719 "Beacon Request: Invalid reporting detail: %d",
720 detail);
721 return -1;
722 }
723
724 if (detail == BEACON_REPORT_DETAIL_NONE)
725 return 0;
726
727 /*
728 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
729 * beacon interval(2) + capabilities(2) = 14 bytes
730 */
731 if (buf_len < 14)
732 return 0;
733
734 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
735 /* The length will be filled later */
736 pos++;
737 WPA_PUT_LE64(pos, bss->tsf);
738 pos += sizeof(bss->tsf);
739 WPA_PUT_LE16(pos, bss->beacon_int);
740 pos += 2;
741 WPA_PUT_LE16(pos, bss->caps);
742 pos += 2;
743
744 rem_len -= pos - buf;
745
746 /*
747 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
748 * body subelement causes the element to exceed the maximum element
749 * size, the subelement is truncated so that the last IE is a complete
750 * IE. So even when required to report all IEs, add elements one after
751 * the other and stop once there is no more room in the measurement
752 * element.
753 */
754 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
755 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
756 (eids && bitfield_is_set(eids, ies[0]))) {
757 u8 eid = ies[0], elen = ies[1];
758
759 if ((eid == WLAN_EID_TIM || eid == WLAN_EID_RSN) &&
760 elen > 4)
761 elen = 4;
762 /*
763 * TODO: Truncate IBSS DFS element as described in
764 * IEEE Std 802.11-2016, 9.4.2.22.7.
765 */
766
767 if (2 + elen > buf + buf_len - pos ||
768 2 + elen > rem_len)
769 break;
770
771 *pos++ = ies[0];
772 *pos++ = elen;
773 os_memcpy(pos, ies + 2, elen);
774 pos += elen;
775 rem_len -= 2 + elen;
776 }
777
778 ies_len -= 2 + ies[1];
779 ies += 2 + ies[1];
780 }
781
782 /* Now the length is known */
783 buf[1] = pos - buf - 2;
784 return pos - buf;
785 }
786
787
wpas_add_beacon_rep(struct wpa_supplicant * wpa_s,struct wpabuf ** wpa_buf,struct wpa_bss * bss,u64 start,u64 parent_tsf)788 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
789 struct wpabuf **wpa_buf, struct wpa_bss *bss,
790 u64 start, u64 parent_tsf)
791 {
792 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
793 u8 *ie = (u8 *) (bss + 1);
794 size_t ie_len = bss->ie_len + bss->beacon_ie_len;
795 int ret;
796 u8 buf[2000];
797 struct rrm_measurement_beacon_report *rep;
798
799 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
800 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
801 return 0;
802
803 if (data->ssid_len &&
804 (data->ssid_len != bss->ssid_len ||
805 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
806 return 0;
807
808 rep = (struct rrm_measurement_beacon_report *) buf;
809 if (wpas_get_op_chan_phy(bss->freq, ie, ie_len, &rep->op_class,
810 &rep->channel, &rep->report_info) < 0)
811 return 0;
812
813 rep->start_time = host_to_le64(start);
814 rep->duration = host_to_le16(data->scan_params.duration);
815 rep->rcpi = rssi_to_rcpi(bss->level);
816 rep->rsni = 255; /* 255 indicates that RSNI is not available */
817 os_memcpy(rep->bssid, bss->bssid, ETH_ALEN);
818 rep->antenna_id = 0; /* unknown */
819 rep->parent_tsf = host_to_le32(parent_tsf);
820
821 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
822 bss, rep->variable,
823 sizeof(buf) - sizeof(*rep));
824 if (ret < 0)
825 return -1;
826
827 return wpas_rrm_report_elem(wpa_buf, wpa_s->beacon_rep_data.token,
828 MEASUREMENT_REPORT_MODE_ACCEPT,
829 MEASURE_TYPE_BEACON, buf,
830 ret + sizeof(*rep));
831 }
832
833
wpas_beacon_rep_no_results(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)834 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
835 struct wpabuf **buf)
836 {
837 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
838 MEASUREMENT_REPORT_MODE_ACCEPT,
839 MEASURE_TYPE_BEACON, NULL, 0);
840 }
841
842
wpas_beacon_rep_table(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)843 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
844 struct wpabuf **buf)
845 {
846 size_t i;
847
848 for (i = 0; i < wpa_s->last_scan_res_used; i++) {
849 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
850 0, 0) < 0)
851 break;
852 }
853
854 if (!(*buf))
855 wpas_beacon_rep_no_results(wpa_s, buf);
856
857 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
858 }
859
860
wpas_rrm_refuse_request(struct wpa_supplicant * wpa_s)861 static void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
862 {
863 struct wpabuf *buf = NULL;
864
865 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
866 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
867 MEASURE_TYPE_BEACON, NULL, 0)) {
868 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
869 wpabuf_free(buf);
870 return;
871 }
872
873 wpas_rrm_send_msr_report(wpa_s, buf);
874 wpas_clear_beacon_rep_data(wpa_s);
875 wpabuf_free(buf);
876 }
877
878
wpas_rrm_scan_timeout(void * eloop_ctx,void * timeout_ctx)879 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
880 {
881 struct wpa_supplicant *wpa_s = eloop_ctx;
882 struct wpa_driver_scan_params *params =
883 &wpa_s->beacon_rep_data.scan_params;
884 u16 prev_duration = params->duration;
885
886 if (!wpa_s->current_bss)
887 return;
888
889 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
890 params->duration) {
891 wpa_printf(MSG_DEBUG,
892 "RRM: Cannot set scan duration due to missing driver support");
893 params->duration = 0;
894 }
895 os_get_reltime(&wpa_s->beacon_rep_scan);
896 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
897 wpa_supplicant_trigger_scan(wpa_s, params))
898 wpas_rrm_refuse_request(wpa_s);
899 params->duration = prev_duration;
900 }
901
902
wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant * wpa_s,struct beacon_rep_data * data,u8 sid,u8 slen,const u8 * subelem)903 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
904 struct beacon_rep_data *data,
905 u8 sid, u8 slen, const u8 *subelem)
906 {
907 u8 report_info, i;
908
909 switch (sid) {
910 case WLAN_BEACON_REQUEST_SUBELEM_SSID:
911 if (!slen) {
912 wpa_printf(MSG_DEBUG,
913 "SSID subelement with zero length - wildcard SSID");
914 break;
915 }
916
917 if (slen > SSID_MAX_LEN) {
918 wpa_printf(MSG_DEBUG,
919 "Invalid SSID subelement length: %u", slen);
920 return -1;
921 }
922
923 data->ssid_len = slen;
924 os_memcpy(data->ssid, subelem, data->ssid_len);
925 break;
926 case WLAN_BEACON_REQUEST_SUBELEM_INFO:
927 if (slen != 2) {
928 wpa_printf(MSG_DEBUG,
929 "Invalid reporting information subelement length: %u",
930 slen);
931 return -1;
932 }
933
934 report_info = subelem[0];
935 if (report_info != 0) {
936 wpa_printf(MSG_DEBUG,
937 "reporting information=%u is not supported",
938 report_info);
939 return 0;
940 }
941 break;
942 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
943 if (slen != 1) {
944 wpa_printf(MSG_DEBUG,
945 "Invalid reporting detail subelement length: %u",
946 slen);
947 return -1;
948 }
949
950 data->report_detail = subelem[0];
951 if (data->report_detail >
952 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
953 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
954 subelem[0]);
955 return 0;
956 }
957
958 break;
959 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
960 if (data->report_detail !=
961 BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
962 wpa_printf(MSG_DEBUG,
963 "Beacon request: request subelement is present but report detail is %u",
964 data->report_detail);
965 return -1;
966 }
967
968 if (!slen) {
969 wpa_printf(MSG_DEBUG,
970 "Invalid request subelement length: %u",
971 slen);
972 return -1;
973 }
974
975 if (data->eids) {
976 wpa_printf(MSG_DEBUG,
977 "Beacon Request: Request subelement appears more than once");
978 return -1;
979 }
980
981 data->eids = bitfield_alloc(255);
982 if (!data->eids) {
983 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
984 return -1;
985 }
986
987 for (i = 0; i < slen; i++)
988 bitfield_set(data->eids, subelem[i]);
989 break;
990 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
991 /* Skip - it will be processed when freqs are added */
992 break;
993 default:
994 wpa_printf(MSG_DEBUG,
995 "Beacon request: Unknown subelement id %u", sid);
996 break;
997 }
998
999 return 1;
1000 }
1001
1002
1003 /**
1004 * Returns 0 if the next element can be processed, 1 if some operation was
1005 * triggered, and -1 if processing failed (i.e., the element is in invalid
1006 * format or an internal error occurred).
1007 */
1008 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)1009 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
1010 u8 elem_token, int duration_mandatory,
1011 const struct rrm_measurement_beacon_request *req,
1012 size_t len, struct wpabuf **buf)
1013 {
1014 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1015 struct wpa_driver_scan_params *params = &data->scan_params;
1016 const u8 *subelems;
1017 size_t elems_len;
1018 u16 rand_interval;
1019 u32 interval_usec;
1020 u32 _rand;
1021 int ret = 0, res;
1022
1023 if (len < sizeof(*req))
1024 return -1;
1025
1026 if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
1027 req->mode != BEACON_REPORT_MODE_ACTIVE &&
1028 req->mode != BEACON_REPORT_MODE_TABLE)
1029 return 0;
1030
1031 subelems = req->variable;
1032 elems_len = len - sizeof(*req);
1033 rand_interval = le_to_host16(req->rand_interval);
1034
1035 os_free(params->freqs);
1036 os_memset(params, 0, sizeof(*params));
1037
1038 data->token = elem_token;
1039
1040 /* default reporting detail is all fixed length fields and all
1041 * elements */
1042 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
1043 os_memcpy(data->bssid, req->bssid, ETH_ALEN);
1044
1045 while (elems_len >= 2) {
1046 if (subelems[1] > elems_len - 2) {
1047 wpa_printf(MSG_DEBUG,
1048 "Beacon Request: Truncated subelement");
1049 ret = -1;
1050 goto out;
1051 }
1052
1053 res = wpas_rm_handle_beacon_req_subelem(
1054 wpa_s, data, subelems[0], subelems[1], &subelems[2]);
1055 if (res != 1) {
1056 ret = res;
1057 goto out;
1058 }
1059
1060 elems_len -= 2 + subelems[1];
1061 subelems += 2 + subelems[1];
1062 }
1063
1064 if (req->mode == BEACON_REPORT_MODE_TABLE) {
1065 wpas_beacon_rep_table(wpa_s, buf);
1066 goto out;
1067 }
1068
1069 params->freqs = wpas_beacon_request_freqs(
1070 wpa_s, req->oper_class, req->channel,
1071 req->mode == BEACON_REPORT_MODE_ACTIVE,
1072 req->variable, len - sizeof(*req));
1073 if (!params->freqs) {
1074 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
1075 goto out;
1076 }
1077
1078 params->duration = le_to_host16(req->duration);
1079 params->duration_mandatory = duration_mandatory;
1080 if (!params->duration) {
1081 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
1082 ret = -1;
1083 goto out;
1084 }
1085
1086 params->only_new_results = 1;
1087
1088 if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
1089 params->ssids[params->num_ssids].ssid = data->ssid;
1090 params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
1091 }
1092
1093 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
1094 _rand = os_random();
1095 interval_usec = (_rand % (rand_interval + 1)) * 1024;
1096 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
1097 NULL);
1098 return 1;
1099 out:
1100 wpas_clear_beacon_rep_data(wpa_s);
1101 return ret;
1102 }
1103
1104
1105 static int
wpas_rrm_handle_msr_req_element(struct wpa_supplicant * wpa_s,const struct rrm_measurement_request_element * req,struct wpabuf ** buf)1106 wpas_rrm_handle_msr_req_element(
1107 struct wpa_supplicant *wpa_s,
1108 const struct rrm_measurement_request_element *req,
1109 struct wpabuf **buf)
1110 {
1111 int duration_mandatory;
1112
1113 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
1114 req->type, req->token);
1115
1116 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
1117 /* Enable bit is not supported for now */
1118 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
1119 return 0;
1120 }
1121
1122 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
1123 req->type > MEASURE_TYPE_RPI_HIST) {
1124 /* Parallel measurements are not supported for now */
1125 wpa_printf(MSG_DEBUG,
1126 "RRM: Parallel measurements are not supported, reject");
1127 goto reject;
1128 }
1129
1130 duration_mandatory =
1131 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
1132
1133 switch (req->type) {
1134 case MEASURE_TYPE_LCI:
1135 return wpas_rrm_build_lci_report(wpa_s, req, buf);
1136 case MEASURE_TYPE_BEACON:
1137 if (duration_mandatory &&
1138 !(wpa_s->drv_rrm_flags &
1139 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
1140 wpa_printf(MSG_DEBUG,
1141 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
1142 goto reject;
1143 }
1144 return wpas_rm_handle_beacon_req(wpa_s, req->token,
1145 duration_mandatory,
1146 (const void *) req->variable,
1147 req->len - 3, buf);
1148 default:
1149 wpa_printf(MSG_INFO,
1150 "RRM: Unsupported radio measurement type %u",
1151 req->type);
1152 break;
1153 }
1154
1155 reject:
1156 if (wpas_rrm_report_elem(buf, req->token,
1157 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
1158 req->type, NULL, 0) < 0) {
1159 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1160 return -1;
1161 }
1162
1163 return 0;
1164 }
1165
1166
1167 static struct wpabuf *
wpas_rrm_process_msr_req_elems(struct wpa_supplicant * wpa_s,const u8 * pos,size_t len)1168 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
1169 size_t len)
1170 {
1171 struct wpabuf *buf = NULL;
1172
1173 while (len) {
1174 const struct rrm_measurement_request_element *req;
1175 int res;
1176
1177 if (len < 2) {
1178 wpa_printf(MSG_DEBUG, "RRM: Truncated element");
1179 goto out;
1180 }
1181
1182 req = (const struct rrm_measurement_request_element *) pos;
1183 if (req->eid != WLAN_EID_MEASURE_REQUEST) {
1184 wpa_printf(MSG_DEBUG,
1185 "RRM: Expected Measurement Request element, but EID is %u",
1186 req->eid);
1187 goto out;
1188 }
1189
1190 if (req->len < 3) {
1191 wpa_printf(MSG_DEBUG, "RRM: Element length too short");
1192 goto out;
1193 }
1194
1195 if (req->len > len - 2) {
1196 wpa_printf(MSG_DEBUG, "RRM: Element length too long");
1197 goto out;
1198 }
1199
1200 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
1201 if (res < 0)
1202 goto out;
1203
1204 pos += req->len + 2;
1205 len -= req->len + 2;
1206 }
1207
1208 return buf;
1209
1210 out:
1211 wpabuf_free(buf);
1212 return NULL;
1213 }
1214
1215
wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * frame,size_t len)1216 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
1217 const u8 *src,
1218 const u8 *frame, size_t len)
1219 {
1220 struct wpabuf *report;
1221
1222 if (wpa_s->wpa_state != WPA_COMPLETED) {
1223 wpa_printf(MSG_INFO,
1224 "RRM: Ignoring radio measurement request: Not associated");
1225 return;
1226 }
1227
1228 if (!wpa_s->rrm.rrm_used) {
1229 wpa_printf(MSG_INFO,
1230 "RRM: Ignoring radio measurement request: Not RRM network");
1231 return;
1232 }
1233
1234 if (len < 3) {
1235 wpa_printf(MSG_INFO,
1236 "RRM: Ignoring too short radio measurement request");
1237 return;
1238 }
1239
1240 wpa_s->rrm.token = *frame;
1241
1242 /* Number of repetitions is not supported */
1243
1244 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
1245 if (!report)
1246 return;
1247
1248 wpas_rrm_send_msr_report(wpa_s, report);
1249 wpabuf_free(report);
1250 }
1251
1252
wpas_rrm_handle_link_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * frame,size_t len,int rssi)1253 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
1254 const u8 *src,
1255 const u8 *frame, size_t len,
1256 int rssi)
1257 {
1258 struct wpabuf *buf;
1259 const struct rrm_link_measurement_request *req;
1260 struct rrm_link_measurement_report report;
1261
1262 if (wpa_s->wpa_state != WPA_COMPLETED) {
1263 wpa_printf(MSG_INFO,
1264 "RRM: Ignoring link measurement request. Not associated");
1265 return;
1266 }
1267
1268 if (!wpa_s->rrm.rrm_used) {
1269 wpa_printf(MSG_INFO,
1270 "RRM: Ignoring link measurement request. Not RRM network");
1271 return;
1272 }
1273
1274 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
1275 wpa_printf(MSG_INFO,
1276 "RRM: Measurement report failed. TX power insertion not supported");
1277 return;
1278 }
1279
1280 req = (const struct rrm_link_measurement_request *) frame;
1281 if (len < sizeof(*req)) {
1282 wpa_printf(MSG_INFO,
1283 "RRM: Link measurement report failed. Request too short");
1284 return;
1285 }
1286
1287 os_memset(&report, 0, sizeof(report));
1288 report.dialog_token = req->dialog_token;
1289 report.tpc.eid = WLAN_EID_TPC_REPORT;
1290 report.tpc.len = 2;
1291 /* Note: The driver is expected to update report.tpc.tx_power and
1292 * report.tpc.link_margin subfields when sending out this frame.
1293 * Similarly, the driver would need to update report.rx_ant_id and
1294 * report.tx_ant_id subfields. */
1295 report.rsni = 255; /* 255 indicates that RSNI is not available */
1296 report.rcpi = rssi_to_rcpi(rssi);
1297
1298 /* action_category + action_code */
1299 buf = wpabuf_alloc(2 + sizeof(report));
1300 if (buf == NULL) {
1301 wpa_printf(MSG_ERROR,
1302 "RRM: Link measurement report failed. Buffer allocation failed");
1303 return;
1304 }
1305
1306 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
1307 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
1308 wpabuf_put_data(buf, &report, sizeof(report));
1309 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf);
1310
1311 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
1312 wpa_s->own_addr, wpa_s->bssid,
1313 wpabuf_head(buf), wpabuf_len(buf), 0)) {
1314 wpa_printf(MSG_ERROR,
1315 "RRM: Link measurement report failed. Send action failed");
1316 }
1317 wpabuf_free(buf);
1318 }
1319
1320
wpas_beacon_rep_scan_process(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res,struct scan_info * info)1321 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
1322 struct wpa_scan_results *scan_res,
1323 struct scan_info *info)
1324 {
1325 size_t i = 0;
1326 struct wpabuf *buf = NULL;
1327
1328 if (!wpa_s->beacon_rep_data.token)
1329 return 0;
1330
1331 if (!wpa_s->current_bss)
1332 goto out;
1333
1334 /* If the measurement was aborted, don't report partial results */
1335 if (info->aborted)
1336 goto out;
1337
1338 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
1339 MAC2STR(info->scan_start_tsf_bssid),
1340 MAC2STR(wpa_s->current_bss->bssid));
1341 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1342 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
1343 ETH_ALEN) != 0) {
1344 wpa_printf(MSG_DEBUG,
1345 "RRM: Ignore scan results due to mismatching TSF BSSID");
1346 goto out;
1347 }
1348
1349 for (i = 0; i < scan_res->num; i++) {
1350 struct wpa_bss *bss =
1351 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
1352
1353 if (!bss)
1354 continue;
1355
1356 if ((wpa_s->drv_rrm_flags &
1357 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1358 os_memcmp(scan_res->res[i]->tsf_bssid,
1359 wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
1360 wpa_printf(MSG_DEBUG,
1361 "RRM: Ignore scan result for " MACSTR
1362 " due to mismatching TSF BSSID" MACSTR,
1363 MAC2STR(scan_res->res[i]->bssid),
1364 MAC2STR(scan_res->res[i]->tsf_bssid));
1365 continue;
1366 }
1367
1368 if (!(wpa_s->drv_rrm_flags &
1369 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
1370 struct os_reltime update_time, diff;
1371
1372 /* For now, allow 8 ms older results due to some
1373 * unknown issue with cfg80211 BSS table updates during
1374 * a scan with the current BSS.
1375 * TODO: Fix this more properly to avoid having to have
1376 * this type of hacks in place. */
1377 calculate_update_time(&scan_res->fetch_time,
1378 scan_res->res[i]->age,
1379 &update_time);
1380 os_reltime_sub(&wpa_s->beacon_rep_scan,
1381 &update_time, &diff);
1382 if (os_reltime_before(&update_time,
1383 &wpa_s->beacon_rep_scan) &&
1384 (diff.sec || diff.usec >= 8000)) {
1385 wpa_printf(MSG_DEBUG,
1386 "RRM: Ignore scan result for " MACSTR
1387 " due to old update (age(ms) %u, calculated age %u.%06u seconds)",
1388 MAC2STR(scan_res->res[i]->bssid),
1389 scan_res->res[i]->age,
1390 (unsigned int) diff.sec,
1391 (unsigned int) diff.usec);
1392 continue;
1393 }
1394 }
1395
1396 /*
1397 * Don't report results that were not received during the
1398 * current measurement.
1399 */
1400 if (info->scan_start_tsf > scan_res->res[i]->parent_tsf)
1401 continue;
1402
1403 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
1404 scan_res->res[i]->parent_tsf) < 0)
1405 break;
1406 }
1407
1408 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
1409 goto out;
1410
1411 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
1412
1413 wpas_rrm_send_msr_report(wpa_s, buf);
1414 wpabuf_free(buf);
1415
1416 out:
1417 wpas_clear_beacon_rep_data(wpa_s);
1418 return 1;
1419 }
1420
1421
wpas_clear_beacon_rep_data(struct wpa_supplicant * wpa_s)1422 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
1423 {
1424 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1425
1426 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
1427 bitfield_free(data->eids);
1428 os_free(data->scan_params.freqs);
1429 os_memset(data, 0, sizeof(*data));
1430 }
1431