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,const u8 * channels,const u8 size)503 static int * wpas_add_channels(const struct oper_class_map *op,
504 struct hostapd_hw_modes *mode,
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)
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)556 static int * wpas_op_class_freqs(const struct oper_class_map *op,
557 struct hostapd_hw_modes *mode)
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, channels, num_chan);
585 }
586
587
wpas_channel_report_freqs(struct wpa_supplicant * wpa_s,const char * country,const u8 * subelems,size_t len)588 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s,
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, 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,const u8 * subelems,size_t len)650 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
651 u8 op_class, u8 chan,
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);
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, &chan, 1);
690 if (!freqs)
691 return NULL;
692 break;
693 }
694
695 ext_freqs = wpas_channel_report_freqs(wpa_s, country, subelems, len);
696 if (ext_freqs) {
697 int_array_concat(&freqs, ext_freqs);
698 os_free(ext_freqs);
699 int_array_sort_unique(freqs);
700 }
701
702 return freqs;
703 }
704
705
wpas_get_op_chan_phy(int freq,const u8 * ies,size_t ies_len,u8 * op_class,u8 * chan,u8 * phy_type)706 int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
707 u8 *op_class, u8 *chan, u8 *phy_type)
708 {
709 const u8 *ie;
710 int sec_chan = 0, vht = 0;
711 struct ieee80211_ht_operation *ht_oper = NULL;
712 struct ieee80211_vht_operation *vht_oper = NULL;
713 u8 seg0, seg1;
714
715 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
716 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
717 u8 sec_chan_offset;
718
719 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
720 sec_chan_offset = ht_oper->ht_param &
721 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
722 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
723 sec_chan = 1;
724 else if (sec_chan_offset ==
725 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
726 sec_chan = -1;
727 }
728
729 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
730 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
731 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
732
733 switch (vht_oper->vht_op_info_chwidth) {
734 case CHANWIDTH_80MHZ:
735 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
736 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
737 if (seg1 && abs(seg1 - seg0) == 8)
738 vht = CONF_OPER_CHWIDTH_160MHZ;
739 else if (seg1)
740 vht = CONF_OPER_CHWIDTH_80P80MHZ;
741 else
742 vht = CONF_OPER_CHWIDTH_80MHZ;
743 break;
744 case CHANWIDTH_160MHZ:
745 vht = CONF_OPER_CHWIDTH_160MHZ;
746 break;
747 case CHANWIDTH_80P80MHZ:
748 vht = CONF_OPER_CHWIDTH_80P80MHZ;
749 break;
750 default:
751 vht = CONF_OPER_CHWIDTH_USE_HT;
752 break;
753 }
754 }
755
756 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
757 chan) == NUM_HOSTAPD_MODES) {
758 wpa_printf(MSG_DEBUG,
759 "Cannot determine operating class and channel");
760 return -1;
761 }
762
763 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
764 vht_oper != NULL);
765 if (*phy_type == PHY_TYPE_UNSPECIFIED) {
766 wpa_printf(MSG_DEBUG, "Cannot determine phy type");
767 return -1;
768 }
769
770 return 0;
771 }
772
773
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)774 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
775 enum beacon_report_detail detail,
776 struct wpa_bss *bss, u8 *buf,
777 size_t buf_len, const u8 **ies_buf,
778 size_t *ie_len, int add_fixed)
779 {
780 const u8 *ies = *ies_buf;
781 size_t ies_len = *ie_len;
782 u8 *pos = buf;
783 int rem_len;
784
785 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
786 sizeof(struct rrm_measurement_report_element) - 2 -
787 REPORTED_FRAME_BODY_SUBELEM_LEN;
788
789 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
790 wpa_printf(MSG_DEBUG,
791 "Beacon Request: Invalid reporting detail: %d",
792 detail);
793 return -1;
794 }
795
796 if (detail == BEACON_REPORT_DETAIL_NONE)
797 return 0;
798
799 /*
800 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
801 * beacon interval(2) + capabilities(2) = 14 bytes
802 */
803 if (add_fixed && buf_len < 14)
804 return -1;
805
806 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
807 /* The length will be filled later */
808 pos++;
809
810 if (add_fixed) {
811 WPA_PUT_LE64(pos, bss->tsf);
812 pos += sizeof(bss->tsf);
813 WPA_PUT_LE16(pos, bss->beacon_int);
814 pos += 2;
815 WPA_PUT_LE16(pos, bss->caps);
816 pos += 2;
817 }
818
819 rem_len -= pos - buf;
820
821 /*
822 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
823 * body subelement causes the element to exceed the maximum element
824 * size, the subelement is truncated so that the last IE is a complete
825 * IE. So even when required to report all IEs, add elements one after
826 * the other and stop once there is no more room in the measurement
827 * element.
828 */
829 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
830 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
831 (eids && bitfield_is_set(eids, ies[0]))) {
832 u8 elen = ies[1];
833
834 if (2 + elen > buf + buf_len - pos ||
835 2 + elen > rem_len)
836 break;
837
838 *pos++ = ies[0];
839 *pos++ = elen;
840 os_memcpy(pos, ies + 2, elen);
841 pos += elen;
842 rem_len -= 2 + elen;
843 }
844
845 ies_len -= 2 + ies[1];
846 ies += 2 + ies[1];
847 }
848
849 *ie_len = ies_len;
850 *ies_buf = ies;
851
852 /* Now the length is known */
853 buf[1] = pos - buf - 2;
854 return pos - buf;
855 }
856
857
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)858 static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data,
859 struct wpa_bss *bss,
860 struct wpabuf **wpa_buf,
861 struct rrm_measurement_beacon_report *rep,
862 const u8 **ie, size_t *ie_len, u8 idx)
863 {
864 int ret;
865 u8 *buf, *pos;
866 u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN +
867 (data->last_indication ?
868 BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0);
869
870 /* Maximum element length: Beacon Report element + Reported Frame Body
871 * subelement + all IEs of the reported Beacon frame + Reported Frame
872 * Body Fragment ID subelement */
873 buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len);
874 if (!buf)
875 return -1;
876
877 os_memcpy(buf, rep, sizeof(*rep));
878
879 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
880 bss, buf + sizeof(*rep),
881 14 + *ie_len, ie, ie_len,
882 idx == 0);
883 if (ret < 0)
884 goto out;
885
886 pos = buf + ret + sizeof(*rep);
887 pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID;
888 pos[1] = 2;
889
890 /*
891 * Only one Beacon Report Measurement is supported at a time, so
892 * the Beacon Report ID can always be set to 1.
893 */
894 pos[2] = 1;
895
896 /* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7)
897 */
898 pos[3] = idx;
899 if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len)
900 pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS;
901 else
902 pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS;
903
904 pos += REPORTED_FRAME_BODY_SUBELEM_LEN;
905
906 if (data->last_indication) {
907 pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION;
908 pos[1] = 1;
909
910 /* This field will be updated later if this is the last frame */
911 pos[2] = 0;
912 }
913
914 ret = wpas_rrm_report_elem(wpa_buf, data->token,
915 MEASUREMENT_REPORT_MODE_ACCEPT,
916 MEASURE_TYPE_BEACON, buf,
917 ret + sizeof(*rep) + subelems_len);
918 out:
919 os_free(buf);
920 return ret;
921 }
922
923
wpas_add_beacon_rep(struct wpa_supplicant * wpa_s,struct wpabuf ** wpa_buf,struct wpa_bss * bss,u64 start,u64 parent_tsf)924 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
925 struct wpabuf **wpa_buf, struct wpa_bss *bss,
926 u64 start, u64 parent_tsf)
927 {
928 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
929 const u8 *ies = wpa_bss_ie_ptr(bss);
930 const u8 *pos = ies;
931 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
932 struct rrm_measurement_beacon_report rep;
933 u8 idx = 0;
934
935 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
936 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
937 return 0;
938
939 if (data->ssid_len &&
940 (data->ssid_len != bss->ssid_len ||
941 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
942 return 0;
943
944 if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class,
945 &rep.channel, &rep.report_info) < 0)
946 return 0;
947
948 rep.start_time = host_to_le64(start);
949 rep.duration = host_to_le16(data->scan_params.duration);
950 rep.rcpi = rssi_to_rcpi(bss->level);
951 rep.rsni = 255; /* 255 indicates that RSNI is not available */
952 os_memcpy(rep.bssid, bss->bssid, ETH_ALEN);
953 rep.antenna_id = 0; /* unknown */
954 rep.parent_tsf = host_to_le32(parent_tsf);
955
956 do {
957 int ret;
958
959 ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep,
960 &pos, &ies_len, idx++);
961 if (ret)
962 return ret;
963 } while (data->report_detail != BEACON_REPORT_DETAIL_NONE &&
964 ies_len >= 2);
965
966 return 0;
967 }
968
969
wpas_beacon_rep_no_results(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)970 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
971 struct wpabuf **buf)
972 {
973 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
974 MEASUREMENT_REPORT_MODE_ACCEPT,
975 MEASURE_TYPE_BEACON, NULL, 0);
976 }
977
978
wpas_beacon_rep_table(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)979 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
980 struct wpabuf **buf)
981 {
982 size_t i;
983
984 for (i = 0; i < wpa_s->last_scan_res_used; i++) {
985 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
986 0, 0) < 0)
987 break;
988 }
989
990 if (!(*buf))
991 wpas_beacon_rep_no_results(wpa_s, buf);
992
993 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
994 }
995
996
wpas_rrm_refuse_request(struct wpa_supplicant * wpa_s)997 void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
998 {
999 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
1000 struct wpabuf *buf = NULL;
1001
1002 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
1003 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
1004 MEASURE_TYPE_BEACON, NULL, 0)) {
1005 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
1006 wpabuf_free(buf);
1007 return;
1008 }
1009
1010 wpas_rrm_send_msr_report(wpa_s, buf);
1011 wpabuf_free(buf);
1012 }
1013
1014 wpas_clear_beacon_rep_data(wpa_s);
1015 }
1016
1017
wpas_rrm_scan_timeout(void * eloop_ctx,void * timeout_ctx)1018 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1019 {
1020 struct wpa_supplicant *wpa_s = eloop_ctx;
1021 struct wpa_driver_scan_params *params =
1022 &wpa_s->beacon_rep_data.scan_params;
1023 u16 prev_duration = params->duration;
1024
1025 if (!wpa_s->current_bss)
1026 return;
1027
1028 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
1029 params->duration) {
1030 wpa_printf(MSG_DEBUG,
1031 "RRM: Cannot set scan duration due to missing driver support");
1032 params->duration = 0;
1033 }
1034 os_get_reltime(&wpa_s->beacon_rep_scan);
1035 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
1036 wpa_supplicant_trigger_scan(wpa_s, params))
1037 wpas_rrm_refuse_request(wpa_s);
1038 params->duration = prev_duration;
1039 }
1040
1041
wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant * wpa_s,struct beacon_rep_data * data,u8 sid,u8 slen,const u8 * subelem)1042 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
1043 struct beacon_rep_data *data,
1044 u8 sid, u8 slen, const u8 *subelem)
1045 {
1046 u8 report_info, i;
1047
1048 switch (sid) {
1049 case WLAN_BEACON_REQUEST_SUBELEM_SSID:
1050 if (!slen) {
1051 wpa_printf(MSG_DEBUG,
1052 "SSID subelement with zero length - wildcard SSID");
1053 break;
1054 }
1055
1056 if (slen > SSID_MAX_LEN) {
1057 wpa_printf(MSG_DEBUG,
1058 "Invalid SSID subelement length: %u", slen);
1059 return -1;
1060 }
1061
1062 data->ssid_len = slen;
1063 os_memcpy(data->ssid, subelem, data->ssid_len);
1064 break;
1065 case WLAN_BEACON_REQUEST_SUBELEM_INFO:
1066 if (slen != 2) {
1067 wpa_printf(MSG_DEBUG,
1068 "Invalid reporting information subelement length: %u",
1069 slen);
1070 return -1;
1071 }
1072
1073 report_info = subelem[0];
1074 if (report_info != 0) {
1075 wpa_printf(MSG_DEBUG,
1076 "reporting information=%u is not supported",
1077 report_info);
1078 return 0;
1079 }
1080 break;
1081 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
1082 if (slen != 1) {
1083 wpa_printf(MSG_DEBUG,
1084 "Invalid reporting detail subelement length: %u",
1085 slen);
1086 return -1;
1087 }
1088
1089 data->report_detail = subelem[0];
1090 if (data->report_detail >
1091 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
1092 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
1093 subelem[0]);
1094 return -1;
1095 }
1096
1097 break;
1098 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
1099 if (data->report_detail !=
1100 BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
1101 wpa_printf(MSG_DEBUG,
1102 "Beacon request: request subelement is present but report detail is %u",
1103 data->report_detail);
1104 return -1;
1105 }
1106
1107 if (!slen) {
1108 wpa_printf(MSG_DEBUG,
1109 "Invalid request subelement length: %u",
1110 slen);
1111 return -1;
1112 }
1113
1114 if (data->eids) {
1115 wpa_printf(MSG_DEBUG,
1116 "Beacon Request: Request subelement appears more than once");
1117 return -1;
1118 }
1119
1120 data->eids = bitfield_alloc(255);
1121 if (!data->eids) {
1122 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
1123 return -1;
1124 }
1125
1126 for (i = 0; i < slen; i++)
1127 bitfield_set(data->eids, subelem[i]);
1128 break;
1129 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
1130 /* Skip - it will be processed when freqs are added */
1131 break;
1132 case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION:
1133 if (slen != 1) {
1134 wpa_printf(MSG_DEBUG,
1135 "Beacon request: Invalid last indication request subelement length: %u",
1136 slen);
1137 return -1;
1138 }
1139
1140 data->last_indication = subelem[0];
1141 break;
1142 default:
1143 wpa_printf(MSG_DEBUG,
1144 "Beacon request: Unknown subelement id %u", sid);
1145 break;
1146 }
1147
1148 return 1;
1149 }
1150
1151
1152 /**
1153 * Returns 0 if the next element can be processed, 1 if some operation was
1154 * triggered, and -1 if processing failed (i.e., the element is in invalid
1155 * format or an internal error occurred).
1156 */
1157 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)1158 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
1159 u8 elem_token, int duration_mandatory,
1160 const struct rrm_measurement_beacon_request *req,
1161 size_t len, struct wpabuf **buf)
1162 {
1163 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1164 struct wpa_driver_scan_params *params = &data->scan_params;
1165 const u8 *subelems;
1166 size_t elems_len;
1167 u16 rand_interval;
1168 u32 interval_usec;
1169 u32 _rand;
1170 int ret = 0, res;
1171 u8 reject_mode;
1172
1173 if (len < sizeof(*req))
1174 return -1;
1175
1176 if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
1177 req->mode != BEACON_REPORT_MODE_ACTIVE &&
1178 req->mode != BEACON_REPORT_MODE_TABLE)
1179 return 0;
1180
1181 subelems = req->variable;
1182 elems_len = len - sizeof(*req);
1183 rand_interval = le_to_host16(req->rand_interval);
1184
1185 os_free(params->freqs);
1186 os_memset(params, 0, sizeof(*params));
1187
1188 data->token = elem_token;
1189
1190 /* default reporting detail is all fixed length fields and all
1191 * elements */
1192 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
1193 os_memcpy(data->bssid, req->bssid, ETH_ALEN);
1194
1195 while (elems_len >= 2) {
1196 if (subelems[1] > elems_len - 2) {
1197 wpa_printf(MSG_DEBUG,
1198 "Beacon Request: Truncated subelement");
1199 ret = -1;
1200 goto out;
1201 }
1202
1203 res = wpas_rm_handle_beacon_req_subelem(
1204 wpa_s, data, subelems[0], subelems[1], &subelems[2]);
1205 if (res < 0) {
1206 ret = res;
1207 goto out;
1208 } else if (!res) {
1209 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE;
1210 goto out_reject;
1211 }
1212
1213 elems_len -= 2 + subelems[1];
1214 subelems += 2 + subelems[1];
1215 }
1216
1217 if (req->mode == BEACON_REPORT_MODE_TABLE) {
1218 wpas_beacon_rep_table(wpa_s, buf);
1219 goto out;
1220 }
1221
1222 params->freqs = wpas_beacon_request_freqs(wpa_s, req->oper_class,
1223 req->channel, req->variable,
1224 len - sizeof(*req));
1225 if (!params->freqs) {
1226 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
1227 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED;
1228 goto out_reject;
1229 }
1230
1231 params->duration = le_to_host16(req->duration);
1232 params->duration_mandatory = duration_mandatory;
1233 if (!params->duration) {
1234 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
1235 ret = -1;
1236 goto out;
1237 }
1238
1239 params->only_new_results = 1;
1240
1241 if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
1242 params->ssids[params->num_ssids].ssid = data->ssid;
1243 params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
1244 }
1245
1246 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
1247 _rand = os_random();
1248 interval_usec = (_rand % (rand_interval + 1)) * 1024;
1249 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
1250 NULL);
1251 return 1;
1252 out_reject:
1253 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1254 wpas_rrm_report_elem(buf, elem_token, reject_mode,
1255 MEASURE_TYPE_BEACON, NULL, 0) < 0) {
1256 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1257 ret = -1;
1258 }
1259 out:
1260 wpas_clear_beacon_rep_data(wpa_s);
1261 return ret;
1262 }
1263
1264
1265 static int
wpas_rrm_handle_msr_req_element(struct wpa_supplicant * wpa_s,const struct rrm_measurement_request_element * req,struct wpabuf ** buf)1266 wpas_rrm_handle_msr_req_element(
1267 struct wpa_supplicant *wpa_s,
1268 const struct rrm_measurement_request_element *req,
1269 struct wpabuf **buf)
1270 {
1271 int duration_mandatory;
1272
1273 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
1274 req->type, req->token);
1275
1276 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
1277 /* Enable bit is not supported for now */
1278 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
1279 return 0;
1280 }
1281
1282 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
1283 req->type > MEASURE_TYPE_RPI_HIST) {
1284 /* Parallel measurements are not supported for now */
1285 wpa_printf(MSG_DEBUG,
1286 "RRM: Parallel measurements are not supported, reject");
1287 goto reject;
1288 }
1289
1290 duration_mandatory =
1291 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
1292
1293 switch (req->type) {
1294 case MEASURE_TYPE_LCI:
1295 return wpas_rrm_build_lci_report(wpa_s, req, buf);
1296 case MEASURE_TYPE_BEACON:
1297 if (duration_mandatory &&
1298 !(wpa_s->drv_rrm_flags &
1299 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
1300 wpa_printf(MSG_DEBUG,
1301 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
1302 goto reject;
1303 }
1304 return wpas_rm_handle_beacon_req(wpa_s, req->token,
1305 duration_mandatory,
1306 (const void *) req->variable,
1307 req->len - 3, buf);
1308 default:
1309 wpa_printf(MSG_INFO,
1310 "RRM: Unsupported radio measurement type %u",
1311 req->type);
1312 break;
1313 }
1314
1315 reject:
1316 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
1317 wpas_rrm_report_elem(buf, req->token,
1318 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
1319 req->type, NULL, 0) < 0) {
1320 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
1321 return -1;
1322 }
1323
1324 return 0;
1325 }
1326
1327
1328 static struct wpabuf *
wpas_rrm_process_msr_req_elems(struct wpa_supplicant * wpa_s,const u8 * pos,size_t len)1329 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
1330 size_t len)
1331 {
1332 struct wpabuf *buf = NULL;
1333
1334 while (len) {
1335 const struct rrm_measurement_request_element *req;
1336 int res;
1337
1338 if (len < 2) {
1339 wpa_printf(MSG_DEBUG, "RRM: Truncated element");
1340 goto out;
1341 }
1342
1343 req = (const struct rrm_measurement_request_element *) pos;
1344 if (req->eid != WLAN_EID_MEASURE_REQUEST) {
1345 wpa_printf(MSG_DEBUG,
1346 "RRM: Expected Measurement Request element, but EID is %u",
1347 req->eid);
1348 goto out;
1349 }
1350
1351 if (req->len < 3) {
1352 wpa_printf(MSG_DEBUG, "RRM: Element length too short");
1353 goto out;
1354 }
1355
1356 if (req->len > len - 2) {
1357 wpa_printf(MSG_DEBUG, "RRM: Element length too long");
1358 goto out;
1359 }
1360
1361 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
1362 if (res < 0)
1363 goto out;
1364
1365 pos += req->len + 2;
1366 len -= req->len + 2;
1367 }
1368
1369 return buf;
1370
1371 out:
1372 wpabuf_free(buf);
1373 return NULL;
1374 }
1375
1376
wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * dst,const u8 * frame,size_t len)1377 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
1378 const u8 *src, const u8 *dst,
1379 const u8 *frame, size_t len)
1380 {
1381 struct wpabuf *report;
1382
1383 if (wpa_s->wpa_state != WPA_COMPLETED) {
1384 wpa_printf(MSG_INFO,
1385 "RRM: Ignoring radio measurement request: Not associated");
1386 return;
1387 }
1388
1389 if (!wpa_s->rrm.rrm_used) {
1390 wpa_printf(MSG_INFO,
1391 "RRM: Ignoring radio measurement request: Not RRM network");
1392 return;
1393 }
1394
1395 if (len < 3) {
1396 wpa_printf(MSG_INFO,
1397 "RRM: Ignoring too short radio measurement request");
1398 return;
1399 }
1400
1401 wpa_s->rrm.token = *frame;
1402 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN);
1403
1404 /* Number of repetitions is not supported */
1405
1406 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
1407 if (!report)
1408 return;
1409
1410 wpas_rrm_send_msr_report(wpa_s, report);
1411 wpabuf_free(report);
1412 }
1413
1414
wpas_rrm_handle_link_measurement_request(struct wpa_supplicant * wpa_s,const u8 * src,const u8 * frame,size_t len,int rssi)1415 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
1416 const u8 *src,
1417 const u8 *frame, size_t len,
1418 int rssi)
1419 {
1420 struct wpabuf *buf;
1421 const struct rrm_link_measurement_request *req;
1422 struct rrm_link_measurement_report report;
1423
1424 if (wpa_s->wpa_state != WPA_COMPLETED) {
1425 wpa_printf(MSG_INFO,
1426 "RRM: Ignoring link measurement request. Not associated");
1427 return;
1428 }
1429
1430 if (!wpa_s->rrm.rrm_used) {
1431 wpa_printf(MSG_INFO,
1432 "RRM: Ignoring link measurement request. Not RRM network");
1433 return;
1434 }
1435
1436 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
1437 wpa_printf(MSG_INFO,
1438 "RRM: Measurement report failed. TX power insertion not supported");
1439 return;
1440 }
1441
1442 req = (const struct rrm_link_measurement_request *) frame;
1443 if (len < sizeof(*req)) {
1444 wpa_printf(MSG_INFO,
1445 "RRM: Link measurement report failed. Request too short");
1446 return;
1447 }
1448
1449 os_memset(&report, 0, sizeof(report));
1450 report.dialog_token = req->dialog_token;
1451 report.tpc.eid = WLAN_EID_TPC_REPORT;
1452 report.tpc.len = 2;
1453 /* Note: The driver is expected to update report.tpc.tx_power and
1454 * report.tpc.link_margin subfields when sending out this frame.
1455 * Similarly, the driver would need to update report.rx_ant_id and
1456 * report.tx_ant_id subfields. */
1457 report.rsni = 255; /* 255 indicates that RSNI is not available */
1458 report.rcpi = rssi_to_rcpi(rssi);
1459
1460 /* action_category + action_code */
1461 buf = wpabuf_alloc(2 + sizeof(report));
1462 if (buf == NULL) {
1463 wpa_printf(MSG_ERROR,
1464 "RRM: Link measurement report failed. Buffer allocation failed");
1465 return;
1466 }
1467
1468 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
1469 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
1470 wpabuf_put_data(buf, &report, sizeof(report));
1471 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf);
1472
1473 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
1474 wpa_s->own_addr, wpa_s->bssid,
1475 wpabuf_head(buf), wpabuf_len(buf), 0)) {
1476 wpa_printf(MSG_ERROR,
1477 "RRM: Link measurement report failed. Send action failed");
1478 }
1479 wpabuf_free(buf);
1480 }
1481
1482
wpas_beacon_rep_scan_process(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res,struct scan_info * info)1483 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
1484 struct wpa_scan_results *scan_res,
1485 struct scan_info *info)
1486 {
1487 size_t i = 0;
1488 struct wpabuf *buf = NULL;
1489
1490 if (!wpa_s->beacon_rep_data.token)
1491 return 0;
1492
1493 if (!wpa_s->current_bss)
1494 goto out;
1495
1496 /* If the measurement was aborted, don't report partial results */
1497 if (info->aborted)
1498 goto out;
1499
1500 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
1501 MAC2STR(info->scan_start_tsf_bssid),
1502 MAC2STR(wpa_s->current_bss->bssid));
1503 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1504 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
1505 ETH_ALEN) != 0) {
1506 wpa_printf(MSG_DEBUG,
1507 "RRM: Ignore scan results due to mismatching TSF BSSID");
1508 goto out;
1509 }
1510
1511 for (i = 0; i < scan_res->num; i++) {
1512 struct wpa_bss *bss =
1513 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
1514
1515 if (!bss)
1516 continue;
1517
1518 if ((wpa_s->drv_rrm_flags &
1519 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
1520 os_memcmp(scan_res->res[i]->tsf_bssid,
1521 wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
1522 wpa_printf(MSG_DEBUG,
1523 "RRM: Ignore scan result for " MACSTR
1524 " due to mismatching TSF BSSID" MACSTR,
1525 MAC2STR(scan_res->res[i]->bssid),
1526 MAC2STR(scan_res->res[i]->tsf_bssid));
1527 continue;
1528 }
1529
1530 /*
1531 * Don't report results that were not received during the
1532 * current measurement.
1533 */
1534 if (!(wpa_s->drv_rrm_flags &
1535 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
1536 struct os_reltime update_time, diff;
1537
1538 /* For now, allow 8 ms older results due to some
1539 * unknown issue with cfg80211 BSS table updates during
1540 * a scan with the current BSS.
1541 * TODO: Fix this more properly to avoid having to have
1542 * this type of hacks in place. */
1543 calculate_update_time(&scan_res->fetch_time,
1544 scan_res->res[i]->age,
1545 &update_time);
1546 os_reltime_sub(&wpa_s->beacon_rep_scan,
1547 &update_time, &diff);
1548 if (os_reltime_before(&update_time,
1549 &wpa_s->beacon_rep_scan) &&
1550 (diff.sec || diff.usec >= 8000)) {
1551 wpa_printf(MSG_DEBUG,
1552 "RRM: Ignore scan result for " MACSTR
1553 " due to old update (age(ms) %u, calculated age %u.%06u seconds)",
1554 MAC2STR(scan_res->res[i]->bssid),
1555 scan_res->res[i]->age,
1556 (unsigned int) diff.sec,
1557 (unsigned int) diff.usec);
1558 continue;
1559 }
1560 } else if (info->scan_start_tsf >
1561 scan_res->res[i]->parent_tsf) {
1562 continue;
1563 }
1564
1565 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
1566 scan_res->res[i]->parent_tsf) < 0)
1567 break;
1568 }
1569
1570 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
1571 goto out;
1572
1573 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
1574
1575 wpas_rrm_send_msr_report(wpa_s, buf);
1576 wpabuf_free(buf);
1577
1578 out:
1579 wpas_clear_beacon_rep_data(wpa_s);
1580 return 1;
1581 }
1582
1583
wpas_clear_beacon_rep_data(struct wpa_supplicant * wpa_s)1584 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
1585 {
1586 struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
1587
1588 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
1589 bitfield_free(data->eids);
1590 os_free(data->scan_params.freqs);
1591 os_memset(data, 0, sizeof(*data));
1592 }
1593