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_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 */
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)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
wpas_rrm_report_elem(struct wpabuf ** buf,u8 token,u8 mode,u8 type,const u8 * data,size_t data_len)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
wpas_rrm_build_lci_report(struct wpa_supplicant * wpa_s,const struct rrm_measurement_request_element * req,struct wpabuf ** buf)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
wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant * wpa_s,const u8 * data,size_t len)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
wpas_rrm_beacon_rep_update_last_frame(u8 * pos,size_t len)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
wpas_rrm_send_msr_report(struct wpa_supplicant * wpa_s,struct wpabuf * buf)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
wpas_add_channel(u8 op_class,u8 chan,u8 num_primary_channels,int * freqs)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
wpas_add_channels(const struct oper_class_map * op,struct hostapd_hw_modes * mode,int active,const u8 * channels,const u8 size)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
wpas_op_class_freqs(const struct oper_class_map * op,struct hostapd_hw_modes * mode,int active)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_5ghz[] = { 42, 58, 106, 122, 138, 155, 171 };
560 u8 channels_160mhz_5ghz[] = { 50, 114, 163 };
561 u8 channels_80mhz_6ghz[] = { 7, 23, 39, 55, 71, 87, 103, 119, 135, 151,
562 167, 183, 199, 215 };
563 u8 channels_160mhz_6ghz[] = { 15, 47, 79, 111, 143, 175, 207 };
564 const u8 *channels = NULL;
565 size_t num_chan = 0;
566 bool is_6ghz = is_6ghz_op_class(op->op_class);
567
568 /*
569 * When adding all channels in the operating class, 80 + 80 MHz
570 * operating classes are like 80 MHz channels because we add all valid
571 * channels anyway.
572 */
573 if (op->bw == BW80 || op->bw == BW80P80) {
574 channels = is_6ghz ? channels_80mhz_6ghz : channels_80mhz_5ghz;
575 num_chan = is_6ghz ? ARRAY_SIZE(channels_80mhz_6ghz) :
576 ARRAY_SIZE(channels_80mhz_5ghz);
577 } else if (op->bw == BW160) {
578 channels = is_6ghz ? channels_160mhz_6ghz :
579 channels_160mhz_5ghz;
580 num_chan = is_6ghz ? ARRAY_SIZE(channels_160mhz_6ghz) :
581 ARRAY_SIZE(channels_160mhz_5ghz);
582 }
583
584 return wpas_add_channels(op, mode, active, channels, num_chan);
585 }
586
587
wpas_channel_report_freqs(struct wpa_supplicant * wpa_s,int active,const char * country,const u8 * subelems,size_t len)588 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
589 const char *country, const u8 *subelems,
590 size_t len)
591 {
592 int *freqs = NULL, *new_freqs;
593 const u8 *end = subelems + len;
594
595 while (end - subelems > 2) {
596 const struct oper_class_map *op;
597 const u8 *ap_chan_elem, *pos;
598 u8 left;
599 struct hostapd_hw_modes *mode;
600
601 ap_chan_elem = get_ie(subelems, end - subelems,
602 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
603 if (!ap_chan_elem)
604 break;
605 pos = ap_chan_elem + 2;
606 left = ap_chan_elem[1];
607 if (left < 1)
608 break;
609 subelems = ap_chan_elem + 2 + left;
610
611 op = get_oper_class(country, *pos);
612 if (!op) {
613 wpa_printf(MSG_DEBUG,
614 "Beacon request: unknown operating class in AP Channel Report subelement %u",
615 *pos);
616 goto out;
617 }
618 pos++;
619 left--;
620
621 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
622 is_6ghz_op_class(op->op_class));
623 if (!mode)
624 continue;
625
626 /*
627 * For 80 + 80 MHz operating classes, this AP Channel Report
628 * element should be followed by another element specifying
629 * the second 80 MHz channel. For now just add this 80 MHz
630 * channel, the second 80 MHz channel will be added when the
631 * next element is parsed.
632 * TODO: Verify that this AP Channel Report element is followed
633 * by a corresponding AP Channel Report element as specified in
634 * IEEE Std 802.11-2016, 11.11.9.1.
635 */
636 new_freqs = wpas_add_channels(op, mode, active, pos, left);
637 if (new_freqs)
638 int_array_concat(&freqs, new_freqs);
639
640 os_free(new_freqs);
641 }
642
643 return freqs;
644 out:
645 os_free(freqs);
646 return NULL;
647 }
648
649
wpas_beacon_request_freqs(struct wpa_supplicant * wpa_s,u8 op_class,u8 chan,int active,const u8 * subelems,size_t len)650 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
651 u8 op_class, u8 chan, int active,
652 const u8 *subelems, size_t len)
653 {
654 int *freqs = NULL, *ext_freqs = NULL;
655 struct hostapd_hw_modes *mode;
656 const char *country = NULL;
657 const struct oper_class_map *op;
658 const u8 *elem;
659
660 if (!wpa_s->current_bss)
661 return NULL;
662 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
663 if (elem && elem[1] >= 2)
664 country = (const char *) (elem + 2);
665
666 op = get_oper_class(country, op_class);
667 if (!op) {
668 wpa_printf(MSG_DEBUG,
669 "Beacon request: invalid operating class %d",
670 op_class);
671 return NULL;
672 }
673
674 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
675 is_6ghz_op_class(op->op_class));
676 if (!mode)
677 return NULL;
678
679 switch (chan) {
680 case 0:
681 freqs = wpas_op_class_freqs(op, mode, active);
682 if (!freqs)
683 return NULL;
684 break;
685 case 255:
686 /* freqs will be added from AP channel subelements */
687 break;
688 default:
689 freqs = wpas_add_channels(op, mode, active, &chan, 1);
690 if (!freqs)
691 return NULL;
692 break;
693 }
694
695 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
696 len);
697 if (ext_freqs) {
698 int_array_concat(&freqs, ext_freqs);
699 os_free(ext_freqs);
700 int_array_sort_unique(freqs);
701 }
702
703 return freqs;
704 }
705
706
wpas_get_op_chan_phy(int freq,const u8 * ies,size_t ies_len,u8 * op_class,u8 * chan,u8 * phy_type)707 int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
708 u8 *op_class, u8 *chan, u8 *phy_type)
709 {
710 const u8 *ie;
711 int sec_chan = 0, vht = 0;
712 struct ieee80211_ht_operation *ht_oper = NULL;
713 struct ieee80211_vht_operation *vht_oper = NULL;
714 u8 seg0, seg1;
715
716 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
717 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
718 u8 sec_chan_offset;
719
720 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
721 sec_chan_offset = ht_oper->ht_param &
722 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
723 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
724 sec_chan = 1;
725 else if (sec_chan_offset ==
726 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
727 sec_chan = -1;
728 }
729
730 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
731 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
732 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
733
734 switch (vht_oper->vht_op_info_chwidth) {
735 case 1:
736 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
737 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
738 if (seg1 && abs(seg1 - seg0) == 8)
739 vht = CHANWIDTH_160MHZ;
740 else if (seg1)
741 vht = CHANWIDTH_80P80MHZ;
742 else
743 vht = CHANWIDTH_80MHZ;
744 break;
745 case 2:
746 vht = CHANWIDTH_160MHZ;
747 break;
748 case 3:
749 vht = CHANWIDTH_80P80MHZ;
750 break;
751 default:
752 vht = CHANWIDTH_USE_HT;
753 break;
754 }
755 }
756
757 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
758 chan) == NUM_HOSTAPD_MODES) {
759 wpa_printf(MSG_DEBUG,
760 "Cannot determine operating class and channel");
761 return -1;
762 }
763
764 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
765 vht_oper != NULL);
766 if (*phy_type == PHY_TYPE_UNSPECIFIED) {
767 wpa_printf(MSG_DEBUG, "Cannot determine phy type");
768 return -1;
769 }
770
771 return 0;
772 }
773
774
wpas_beacon_rep_add_frame_body(struct bitfield * eids,enum beacon_report_detail detail,struct wpa_bss * bss,u8 * buf,size_t buf_len,const u8 ** ies_buf,size_t * ie_len,int add_fixed)775 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
776 enum beacon_report_detail detail,
777 struct wpa_bss *bss, u8 *buf,
778 size_t buf_len, const u8 **ies_buf,
779 size_t *ie_len, int add_fixed)
780 {
781 const u8 *ies = *ies_buf;
782 size_t ies_len = *ie_len;
783 u8 *pos = buf;
784 int rem_len;
785
786 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
787 sizeof(struct rrm_measurement_report_element) - 2 -
788 REPORTED_FRAME_BODY_SUBELEM_LEN;
789
790 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
791 wpa_printf(MSG_DEBUG,
792 "Beacon Request: Invalid reporting detail: %d",
793 detail);
794 return -1;
795 }
796
797 if (detail == BEACON_REPORT_DETAIL_NONE)
798 return 0;
799
800 /*
801 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
802 * beacon interval(2) + capabilities(2) = 14 bytes
803 */
804 if (add_fixed && buf_len < 14)
805 return -1;
806
807 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
808 /* The length will be filled later */
809 pos++;
810
811 if (add_fixed) {
812 WPA_PUT_LE64(pos, bss->tsf);
813 pos += sizeof(bss->tsf);
814 WPA_PUT_LE16(pos, bss->beacon_int);
815 pos += 2;
816 WPA_PUT_LE16(pos, bss->caps);
817 pos += 2;
818 }
819
820 rem_len -= pos - buf;
821
822 /*
823 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
824 * body subelement causes the element to exceed the maximum element
825 * size, the subelement is truncated so that the last IE is a complete
826 * IE. So even when required to report all IEs, add elements one after
827 * the other and stop once there is no more room in the measurement
828 * element.
829 */
830 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
831 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
832 (eids && bitfield_is_set(eids, ies[0]))) {
833 u8 elen = ies[1];
834
835 if (2 + elen > buf + buf_len - pos ||
836 2 + elen > rem_len)
837 break;
838
839 *pos++ = ies[0];
840 *pos++ = elen;
841 os_memcpy(pos, ies + 2, elen);
842 pos += elen;
843 rem_len -= 2 + elen;
844 }
845
846 ies_len -= 2 + ies[1];
847 ies += 2 + ies[1];
848 }
849
850 *ie_len = ies_len;
851 *ies_buf = ies;
852
853 /* Now the length is known */
854 buf[1] = pos - buf - 2;
855 return pos - buf;
856 }
857
858
wpas_add_beacon_rep_elem(struct beacon_rep_data * data,struct wpa_bss * bss,struct wpabuf ** wpa_buf,struct rrm_measurement_beacon_report * rep,const u8 ** ie,size_t * ie_len,u8 idx)859 static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data,
860 struct wpa_bss *bss,
861 struct wpabuf **wpa_buf,
862 struct rrm_measurement_beacon_report *rep,
863 const u8 **ie, size_t *ie_len, u8 idx)
864 {
865 int ret;
866 u8 *buf, *pos;
867 u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN +
868 (data->last_indication ?
869 BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0);
870
871 /* Maximum element length: Beacon Report element + Reported Frame Body
872 * subelement + all IEs of the reported Beacon frame + Reported Frame
873 * Body Fragment ID subelement */
874 buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len);
875 if (!buf)
876 return -1;
877
878 os_memcpy(buf, rep, sizeof(*rep));
879
880 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
881 bss, buf + sizeof(*rep),
882 14 + *ie_len, ie, ie_len,
883 idx == 0);
884 if (ret < 0)
885 goto out;
886
887 pos = buf + ret + sizeof(*rep);
888 pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID;
889 pos[1] = 2;
890
891 /*
892 * Only one Beacon Report Measurement is supported at a time, so
893 * the Beacon Report ID can always be set to 1.
894 */
895 pos[2] = 1;
896
897 /* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7)
898 */
899 pos[3] = idx;
900 if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len)
901 pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS;
902 else
903 pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS;
904
905 pos += REPORTED_FRAME_BODY_SUBELEM_LEN;
906
907 if (data->last_indication) {
908 pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION;
909 pos[1] = 1;
910
911 /* This field will be updated later if this is the last frame */
912 pos[2] = 0;
913 }
914
915 ret = wpas_rrm_report_elem(wpa_buf, data->token,
916 MEASUREMENT_REPORT_MODE_ACCEPT,
917 MEASURE_TYPE_BEACON, buf,
918 ret + sizeof(*rep) + subelems_len);
919 out:
920 os_free(buf);
921 return ret;
922 }
923
924
wpas_add_beacon_rep(struct wpa_supplicant * wpa_s,struct wpabuf ** wpa_buf,struct wpa_bss * bss,u64 start,u64 parent_tsf)925 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
926 struct wpabuf **wpa_buf, struct wpa_bss *bss,
927 u64 start, u64 parent_tsf)
928 {
929 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
930 const u8 *ies = wpa_bss_ie_ptr(bss);
931 const u8 *pos = ies;
932 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
933 struct rrm_measurement_beacon_report rep;
934 u8 idx = 0;
935
936 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
937 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
938 return 0;
939
940 if (data->ssid_len &&
941 (data->ssid_len != bss->ssid_len ||
942 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
943 return 0;
944
945 if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class,
946 &rep.channel, &rep.report_info) < 0)
947 return 0;
948
949 rep.start_time = host_to_le64(start);
950 rep.duration = host_to_le16(data->scan_params.duration);
951 rep.rcpi = rssi_to_rcpi(bss->level);
952 rep.rsni = 255; /* 255 indicates that RSNI is not available */
953 os_memcpy(rep.bssid, bss->bssid, ETH_ALEN);
954 rep.antenna_id = 0; /* unknown */
955 rep.parent_tsf = host_to_le32(parent_tsf);
956
957 do {
958 int ret;
959
960 ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep,
961 &pos, &ies_len, idx++);
962 if (ret)
963 return ret;
964 } while (data->report_detail != BEACON_REPORT_DETAIL_NONE &&
965 ies_len >= 2);
966
967 return 0;
968 }
969
970
wpas_beacon_rep_no_results(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)971 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
972 struct wpabuf **buf)
973 {
974 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
975 MEASUREMENT_REPORT_MODE_ACCEPT,
976 MEASURE_TYPE_BEACON, NULL, 0);
977 }
978
979
wpas_beacon_rep_table(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)980 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
981 struct wpabuf **buf)
982 {
983 size_t i;
984
985 for (i = 0; i < wpa_s->last_scan_res_used; i++) {
986 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
987 0, 0) < 0)
988 break;
989 }
990
991 if (!(*buf))
992 wpas_beacon_rep_no_results(wpa_s, buf);
993
994 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
995 }
996
997
wpas_rrm_refuse_request(struct wpa_supplicant * wpa_s)998 void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
999 {
1000 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
1001 struct wpabuf *buf = NULL;
1002
1003 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
1004 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
1005 MEASURE_TYPE_BEACON, NULL, 0)) {
1006 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
1007 wpabuf_free(buf);
1008 return;
1009 }
1010
1011 wpas_rrm_send_msr_report(wpa_s, buf);
1012 wpabuf_free(buf);
1013 }
1014
1015 wpas_clear_beacon_rep_data(wpa_s);
1016 }
1017
1018
wpas_rrm_scan_timeout(void * eloop_ctx,void * timeout_ctx)1019 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1020 {
1021 struct wpa_supplicant *wpa_s = eloop_ctx;
1022 struct wpa_driver_scan_params *params =
1023 &wpa_s->beacon_rep_data.scan_params;
1024 u16 prev_duration = params->duration;
1025
1026 if (!wpa_s->current_bss)
1027 return;
1028
1029 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
1030 params->duration) {
1031 wpa_printf(MSG_DEBUG,
1032 "RRM: Cannot set scan duration due to missing driver support");
1033 params->duration = 0;
1034 }
1035 os_get_reltime(&wpa_s->beacon_rep_scan);
1036 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
1037 wpa_supplicant_trigger_scan(wpa_s, params))
1038 wpas_rrm_refuse_request(wpa_s);
1039 params->duration = prev_duration;
1040 }
1041
1042
wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant * wpa_s,struct beacon_rep_data * data,u8 sid,u8 slen,const u8 * subelem)1043 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
1044 struct beacon_rep_data *data,
1045 u8 sid, u8 slen, const u8 *subelem)
1046 {
1047 u8 report_info, i;
1048
1049 switch (sid) {
1050 case WLAN_BEACON_REQUEST_SUBELEM_SSID:
1051 if (!slen) {
1052 wpa_printf(MSG_DEBUG,
1053 "SSID subelement with zero length - wildcard SSID");
1054 break;
1055 }
1056
1057 if (slen > SSID_MAX_LEN) {
1058 wpa_printf(MSG_DEBUG,
1059 "Invalid SSID subelement length: %u", slen);
1060 return -1;
1061 }
1062
1063 data->ssid_len = slen;
1064 os_memcpy(data->ssid, subelem, data->ssid_len);
1065 break;
1066 case WLAN_BEACON_REQUEST_SUBELEM_INFO:
1067 if (slen != 2) {
1068 wpa_printf(MSG_DEBUG,
1069 "Invalid reporting information subelement length: %u",
1070 slen);
1071 return -1;
1072 }
1073
1074 report_info = subelem[0];
1075 if (report_info != 0) {
1076 wpa_printf(MSG_DEBUG,
1077 "reporting information=%u is not supported",
1078 report_info);
1079 return 0;
1080 }
1081 break;
1082 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
1083 if (slen != 1) {
1084 wpa_printf(MSG_DEBUG,
1085 "Invalid reporting detail subelement length: %u",
1086 slen);
1087 return -1;
1088 }
1089
1090 data->report_detail = subelem[0];
1091 if (data->report_detail >
1092 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
1093 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
1094 subelem[0]);
1095 return -1;
1096 }
1097
1098 break;
1099 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
1100 if (data->report_detail !=
1101 BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
1102 wpa_printf(MSG_DEBUG,
1103 "Beacon request: request subelement is present but report detail is %u",
1104 data->report_detail);
1105 return -1;
1106 }
1107
1108 if (!slen) {
1109 wpa_printf(MSG_DEBUG,
1110 "Invalid request subelement length: %u",
1111 slen);
1112 return -1;
1113 }
1114
1115 if (data->eids) {
1116 wpa_printf(MSG_DEBUG,
1117 "Beacon Request: Request subelement appears more than once");
1118 return -1;
1119 }
1120
1121 data->eids = bitfield_alloc(255);
1122 if (!data->eids) {
1123 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
1124 return -1;
1125 }
1126
1127 for (i = 0; i < slen; i++)
1128 bitfield_set(data->eids, subelem[i]);
1129 break;
1130 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
1131 /* Skip - it will be processed when freqs are added */
1132 break;
1133 case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION:
1134 if (slen != 1) {
1135 wpa_printf(MSG_DEBUG,
1136 "Beacon request: Invalid last indication request subelement length: %u",
1137 slen);
1138 return -1;
1139 }
1140
1141 data->last_indication = subelem[0];
1142 break;
1143 default:
1144 wpa_printf(MSG_DEBUG,
1145 "Beacon request: Unknown subelement id %u", sid);
1146 break;
1147 }
1148
1149 return 1;
1150 }
1151
1152
1153 /**
1154 * Returns 0 if the next element can be processed, 1 if some operation was
1155 * triggered, and -1 if processing failed (i.e., the element is in invalid
1156 * format or an internal error occurred).
1157 */
1158 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)1159 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
1160 u8 elem_token, int duration_mandatory,
1161 const struct rrm_measurement_beacon_request *req,
1162 size_t len, struct wpabuf **buf)
1163 {
1164 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1165 struct wpa_driver_scan_params *params = &data->scan_params;
1166 const u8 *subelems;
1167 size_t elems_len;
1168 u16 rand_interval;
1169 u32 interval_usec;
1170 u32 _rand;
1171 int ret = 0, res;
1172 u8 reject_mode;
1173
1174 if (len < sizeof(*req))
1175 return -1;
1176
1177 if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
1178 req->mode != BEACON_REPORT_MODE_ACTIVE &&
1179 req->mode != BEACON_REPORT_MODE_TABLE)
1180 return 0;
1181
1182 subelems = req->variable;
1183 elems_len = len - sizeof(*req);
1184 rand_interval = le_to_host16(req->rand_interval);
1185
1186 os_free(params->freqs);
1187 os_memset(params, 0, sizeof(*params));
1188
1189 data->token = elem_token;
1190
1191 /* default reporting detail is all fixed length fields and all
1192 * elements */
1193 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
1194 os_memcpy(data->bssid, req->bssid, ETH_ALEN);
1195
1196 while (elems_len >= 2) {
1197 if (subelems[1] > elems_len - 2) {
1198 wpa_printf(MSG_DEBUG,
1199 "Beacon Request: Truncated subelement");
1200 ret = -1;
1201 goto out;
1202 }
1203
1204 res = wpas_rm_handle_beacon_req_subelem(
1205 wpa_s, data, subelems[0], subelems[1], &subelems[2]);
1206 if (res < 0) {
1207 ret = res;
1208 goto out;
1209 } else if (!res) {
1210 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE;
1211 goto out_reject;
1212 }
1213
1214 elems_len -= 2 + subelems[1];
1215 subelems += 2 + subelems[1];
1216 }
1217
1218 if (req->mode == BEACON_REPORT_MODE_TABLE) {
1219 wpas_beacon_rep_table(wpa_s, buf);
1220 goto out;
1221 }
1222
1223 params->freqs = wpas_beacon_request_freqs(
1224 wpa_s, req->oper_class, req->channel,
1225 req->mode == BEACON_REPORT_MODE_ACTIVE,
1226 req->variable, len - sizeof(*req));
1227 if (!params->freqs) {
1228 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
1229 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED;
1230 goto out_reject;
1231 }
1232
1233 params->duration = le_to_host16(req->duration);
1234 params->duration_mandatory = duration_mandatory;
1235 if (!params->duration) {
1236 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
1237 ret = -1;
1238 goto out;
1239 }
1240
1241 params->only_new_results = 1;
1242
1243 if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
1244 params->ssids[params->num_ssids].ssid = data->ssid;
1245 params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
1246 }
1247
1248 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
1249 _rand = os_random();
1250 interval_usec = (_rand % (rand_interval + 1)) * 1024;
1251 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
1252 NULL);
1253 return 1;
1254 out_reject:
1255 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1256 wpas_rrm_report_elem(buf, elem_token, reject_mode,
1257 MEASURE_TYPE_BEACON, NULL, 0) < 0) {
1258 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1259 ret = -1;
1260 }
1261 out:
1262 wpas_clear_beacon_rep_data(wpa_s);
1263 return ret;
1264 }
1265
1266
1267 static int
wpas_rrm_handle_msr_req_element(struct wpa_supplicant * wpa_s,const struct rrm_measurement_request_element * req,struct wpabuf ** buf)1268 wpas_rrm_handle_msr_req_element(
1269 struct wpa_supplicant *wpa_s,
1270 const struct rrm_measurement_request_element *req,
1271 struct wpabuf **buf)
1272 {
1273 int duration_mandatory;
1274
1275 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
1276 req->type, req->token);
1277
1278 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
1279 /* Enable bit is not supported for now */
1280 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
1281 return 0;
1282 }
1283
1284 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
1285 req->type > MEASURE_TYPE_RPI_HIST) {
1286 /* Parallel measurements are not supported for now */
1287 wpa_printf(MSG_DEBUG,
1288 "RRM: Parallel measurements are not supported, reject");
1289 goto reject;
1290 }
1291
1292 duration_mandatory =
1293 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
1294
1295 switch (req->type) {
1296 case MEASURE_TYPE_LCI:
1297 return wpas_rrm_build_lci_report(wpa_s, req, buf);
1298 case MEASURE_TYPE_BEACON:
1299 if (duration_mandatory &&
1300 !(wpa_s->drv_rrm_flags &
1301 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
1302 wpa_printf(MSG_DEBUG,
1303 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
1304 goto reject;
1305 }
1306 return wpas_rm_handle_beacon_req(wpa_s, req->token,
1307 duration_mandatory,
1308 (const void *) req->variable,
1309 req->len - 3, buf);
1310 default:
1311 wpa_printf(MSG_INFO,
1312 "RRM: Unsupported radio measurement type %u",
1313 req->type);
1314 break;
1315 }
1316
1317 reject:
1318 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1319 wpas_rrm_report_elem(buf, req->token,
1320 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
1321 req->type, NULL, 0) < 0) {
1322 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1323 return -1;
1324 }
1325
1326 return 0;
1327 }
1328
1329
1330 static struct wpabuf *
wpas_rrm_process_msr_req_elems(struct wpa_supplicant * wpa_s,const u8 * pos,size_t len)1331 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
1332 size_t len)
1333 {
1334 struct wpabuf *buf = NULL;
1335
1336 while (len) {
1337 const struct rrm_measurement_request_element *req;
1338 int res;
1339
1340 if (len < 2) {
1341 wpa_printf(MSG_DEBUG, "RRM: Truncated element");
1342 goto out;
1343 }
1344
1345 req = (const struct rrm_measurement_request_element *) pos;
1346 if (req->eid != WLAN_EID_MEASURE_REQUEST) {
1347 wpa_printf(MSG_DEBUG,
1348 "RRM: Expected Measurement Request element, but EID is %u",
1349 req->eid);
1350 goto out;
1351 }
1352
1353 if (req->len < 3) {
1354 wpa_printf(MSG_DEBUG, "RRM: Element length too short");
1355 goto out;
1356 }
1357
1358 if (req->len > len - 2) {
1359 wpa_printf(MSG_DEBUG, "RRM: Element length too long");
1360 goto out;
1361 }
1362
1363 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
1364 if (res < 0)
1365 goto out;
1366
1367 pos += req->len + 2;
1368 len -= req->len + 2;
1369 }
1370
1371 return buf;
1372
1373 out:
1374 wpabuf_free(buf);
1375 return NULL;
1376 }
1377
1378
wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * dst,const u8 * frame,size_t len)1379 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
1380 const u8 *src, const u8 *dst,
1381 const u8 *frame, size_t len)
1382 {
1383 struct wpabuf *report;
1384
1385 if (wpa_s->wpa_state != WPA_COMPLETED) {
1386 wpa_printf(MSG_INFO,
1387 "RRM: Ignoring radio measurement request: Not associated");
1388 return;
1389 }
1390
1391 if (!wpa_s->rrm.rrm_used) {
1392 wpa_printf(MSG_INFO,
1393 "RRM: Ignoring radio measurement request: Not RRM network");
1394 return;
1395 }
1396
1397 if (len < 3) {
1398 wpa_printf(MSG_INFO,
1399 "RRM: Ignoring too short radio measurement request");
1400 return;
1401 }
1402
1403 wpa_s->rrm.token = *frame;
1404 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN);
1405
1406 /* Number of repetitions is not supported */
1407
1408 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
1409 if (!report)
1410 return;
1411
1412 wpas_rrm_send_msr_report(wpa_s, report);
1413 wpabuf_free(report);
1414 }
1415
1416
wpas_rrm_handle_link_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * frame,size_t len,int rssi)1417 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
1418 const u8 *src,
1419 const u8 *frame, size_t len,
1420 int rssi)
1421 {
1422 struct wpabuf *buf;
1423 const struct rrm_link_measurement_request *req;
1424 struct rrm_link_measurement_report report;
1425
1426 if (wpa_s->wpa_state != WPA_COMPLETED) {
1427 wpa_printf(MSG_INFO,
1428 "RRM: Ignoring link measurement request. Not associated");
1429 return;
1430 }
1431
1432 if (!wpa_s->rrm.rrm_used) {
1433 wpa_printf(MSG_INFO,
1434 "RRM: Ignoring link measurement request. Not RRM network");
1435 return;
1436 }
1437
1438 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
1439 wpa_printf(MSG_INFO,
1440 "RRM: Measurement report failed. TX power insertion not supported");
1441 return;
1442 }
1443
1444 req = (const struct rrm_link_measurement_request *) frame;
1445 if (len < sizeof(*req)) {
1446 wpa_printf(MSG_INFO,
1447 "RRM: Link measurement report failed. Request too short");
1448 return;
1449 }
1450
1451 os_memset(&report, 0, sizeof(report));
1452 report.dialog_token = req->dialog_token;
1453 report.tpc.eid = WLAN_EID_TPC_REPORT;
1454 report.tpc.len = 2;
1455 /* Note: The driver is expected to update report.tpc.tx_power and
1456 * report.tpc.link_margin subfields when sending out this frame.
1457 * Similarly, the driver would need to update report.rx_ant_id and
1458 * report.tx_ant_id subfields. */
1459 report.rsni = 255; /* 255 indicates that RSNI is not available */
1460 report.rcpi = rssi_to_rcpi(rssi);
1461
1462 /* action_category + action_code */
1463 buf = wpabuf_alloc(2 + sizeof(report));
1464 if (buf == NULL) {
1465 wpa_printf(MSG_ERROR,
1466 "RRM: Link measurement report failed. Buffer allocation failed");
1467 return;
1468 }
1469
1470 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
1471 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
1472 wpabuf_put_data(buf, &report, sizeof(report));
1473 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf);
1474
1475 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
1476 wpa_s->own_addr, wpa_s->bssid,
1477 wpabuf_head(buf), wpabuf_len(buf), 0)) {
1478 wpa_printf(MSG_ERROR,
1479 "RRM: Link measurement report failed. Send action failed");
1480 }
1481 wpabuf_free(buf);
1482 }
1483
1484
wpas_beacon_rep_scan_process(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res,struct scan_info * info)1485 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
1486 struct wpa_scan_results *scan_res,
1487 struct scan_info *info)
1488 {
1489 size_t i = 0;
1490 struct wpabuf *buf = NULL;
1491
1492 if (!wpa_s->beacon_rep_data.token)
1493 return 0;
1494
1495 if (!wpa_s->current_bss)
1496 goto out;
1497
1498 /* If the measurement was aborted, don't report partial results */
1499 if (info->aborted)
1500 goto out;
1501
1502 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
1503 MAC2STR(info->scan_start_tsf_bssid),
1504 MAC2STR(wpa_s->current_bss->bssid));
1505 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1506 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
1507 ETH_ALEN) != 0) {
1508 wpa_printf(MSG_DEBUG,
1509 "RRM: Ignore scan results due to mismatching TSF BSSID");
1510 goto out;
1511 }
1512
1513 for (i = 0; i < scan_res->num; i++) {
1514 struct wpa_bss *bss =
1515 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
1516
1517 if (!bss)
1518 continue;
1519
1520 if ((wpa_s->drv_rrm_flags &
1521 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1522 os_memcmp(scan_res->res[i]->tsf_bssid,
1523 wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
1524 wpa_printf(MSG_DEBUG,
1525 "RRM: Ignore scan result for " MACSTR
1526 " due to mismatching TSF BSSID" MACSTR,
1527 MAC2STR(scan_res->res[i]->bssid),
1528 MAC2STR(scan_res->res[i]->tsf_bssid));
1529 continue;
1530 }
1531
1532 /*
1533 * Don't report results that were not received during the
1534 * current measurement.
1535 */
1536 if (!(wpa_s->drv_rrm_flags &
1537 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
1538 struct os_reltime update_time, diff;
1539
1540 /* For now, allow 8 ms older results due to some
1541 * unknown issue with cfg80211 BSS table updates during
1542 * a scan with the current BSS.
1543 * TODO: Fix this more properly to avoid having to have
1544 * this type of hacks in place. */
1545 calculate_update_time(&scan_res->fetch_time,
1546 scan_res->res[i]->age,
1547 &update_time);
1548 os_reltime_sub(&wpa_s->beacon_rep_scan,
1549 &update_time, &diff);
1550 if (os_reltime_before(&update_time,
1551 &wpa_s->beacon_rep_scan) &&
1552 (diff.sec || diff.usec >= 8000)) {
1553 wpa_printf(MSG_DEBUG,
1554 "RRM: Ignore scan result for " MACSTR
1555 " due to old update (age(ms) %u, calculated age %u.%06u seconds)",
1556 MAC2STR(scan_res->res[i]->bssid),
1557 scan_res->res[i]->age,
1558 (unsigned int) diff.sec,
1559 (unsigned int) diff.usec);
1560 continue;
1561 }
1562 } else if (info->scan_start_tsf >
1563 scan_res->res[i]->parent_tsf) {
1564 continue;
1565 }
1566
1567 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
1568 scan_res->res[i]->parent_tsf) < 0)
1569 break;
1570 }
1571
1572 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
1573 goto out;
1574
1575 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
1576
1577 wpas_rrm_send_msr_report(wpa_s, buf);
1578 wpabuf_free(buf);
1579
1580 out:
1581 wpas_clear_beacon_rep_data(wpa_s);
1582 return 1;
1583 }
1584
1585
wpas_clear_beacon_rep_data(struct wpa_supplicant * wpa_s)1586 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
1587 {
1588 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1589
1590 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
1591 bitfield_free(data->eids);
1592 os_free(data->scan_params.freqs);
1593 os_memset(data, 0, sizeof(*data));
1594 }
1595