1 /* 2 * wpa_supplicant - Radio Measurements 3 * Copyright (c) 2003-2016, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "common/ieee802_11_common.h" 14 #include "wpa_supplicant_i.h" 15 #include "driver_i.h" 16 #include "bss.h" 17 #include "scan.h" 18 #include "p2p_supplicant.h" 19 20 21 static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx) 22 { 23 struct rrm_data *rrm = data; 24 25 if (!rrm->notify_neighbor_rep) { 26 wpa_printf(MSG_ERROR, 27 "RRM: Unexpected neighbor report timeout"); 28 return; 29 } 30 31 wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report - NONE"); 32 rrm->notify_neighbor_rep(rrm->neighbor_rep_cb_ctx, NULL); 33 34 rrm->notify_neighbor_rep = NULL; 35 rrm->neighbor_rep_cb_ctx = NULL; 36 } 37 38 39 /* 40 * wpas_rrm_reset - Clear and reset all RRM data in wpa_supplicant 41 * @wpa_s: Pointer to wpa_supplicant 42 */ 43 void wpas_rrm_reset(struct wpa_supplicant *wpa_s) 44 { 45 wpa_s->rrm.rrm_used = 0; 46 47 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm, 48 NULL); 49 if (wpa_s->rrm.notify_neighbor_rep) 50 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL); 51 wpa_s->rrm.next_neighbor_rep_token = 1; 52 wpas_clear_beacon_rep_data(wpa_s); 53 } 54 55 56 /* 57 * wpas_rrm_process_neighbor_rep - Handle incoming neighbor report 58 * @wpa_s: Pointer to wpa_supplicant 59 * @report: Neighbor report buffer, prefixed by a 1-byte dialog token 60 * @report_len: Length of neighbor report buffer 61 */ 62 void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s, 63 const u8 *report, size_t report_len) 64 { 65 struct wpabuf *neighbor_rep; 66 67 wpa_hexdump(MSG_DEBUG, "RRM: New Neighbor Report", report, report_len); 68 if (report_len < 1) 69 return; 70 71 if (report[0] != wpa_s->rrm.next_neighbor_rep_token - 1) { 72 wpa_printf(MSG_DEBUG, 73 "RRM: Discarding neighbor report with token %d (expected %d)", 74 report[0], wpa_s->rrm.next_neighbor_rep_token - 1); 75 return; 76 } 77 78 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm, 79 NULL); 80 81 if (!wpa_s->rrm.notify_neighbor_rep) { 82 wpa_printf(MSG_ERROR, "RRM: Unexpected neighbor report"); 83 return; 84 } 85 86 /* skipping the first byte, which is only an id (dialog token) */ 87 neighbor_rep = wpabuf_alloc(report_len - 1); 88 if (!neighbor_rep) { 89 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL); 90 return; 91 } 92 wpabuf_put_data(neighbor_rep, report + 1, report_len - 1); 93 wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report (token = %d)", 94 report[0]); 95 wpa_s->rrm.notify_neighbor_rep(wpa_s->rrm.neighbor_rep_cb_ctx, 96 neighbor_rep); 97 wpa_s->rrm.notify_neighbor_rep = NULL; 98 wpa_s->rrm.neighbor_rep_cb_ctx = NULL; 99 } 100 101 102 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS) 103 /* Workaround different, undefined for Windows, error codes used here */ 104 #define ENOTCONN -1 105 #define EOPNOTSUPP -1 106 #define ECANCELED -1 107 #endif 108 109 /* Measurement Request element + Location Subject + Maximum Age subelement */ 110 #define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4) 111 /* Measurement Request element + Location Civic Request */ 112 #define MEASURE_REQUEST_CIVIC_LEN (3 + 5) 113 114 115 /** 116 * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP 117 * @wpa_s: Pointer to wpa_supplicant 118 * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE 119 * is sent in the request. 120 * @lci: if set, neighbor request will include LCI request 121 * @civic: if set, neighbor request will include civic location request 122 * @cb: Callback function to be called once the requested report arrives, or 123 * timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds. 124 * In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's 125 * the requester's responsibility to free it. 126 * In the latter case NULL will be sent in 'neighbor_rep'. 127 * @cb_ctx: Context value to send the callback function 128 * Returns: 0 in case of success, negative error code otherwise 129 * 130 * In case there is a previous request which has not been answered yet, the 131 * new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT. 132 * Request must contain a callback function. 133 */ 134 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s, 135 const struct wpa_ssid_value *ssid, 136 int lci, int civic, 137 void (*cb)(void *ctx, 138 struct wpabuf *neighbor_rep), 139 void *cb_ctx) 140 { 141 struct wpabuf *buf; 142 const u8 *rrm_ie; 143 144 if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) { 145 wpa_printf(MSG_DEBUG, "RRM: No connection, no RRM."); 146 return -ENOTCONN; 147 } 148 149 if (!wpa_s->rrm.rrm_used) { 150 wpa_printf(MSG_DEBUG, "RRM: No RRM in current connection."); 151 return -EOPNOTSUPP; 152 } 153 154 rrm_ie = wpa_bss_get_ie(wpa_s->current_bss, 155 WLAN_EID_RRM_ENABLED_CAPABILITIES); 156 if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) || 157 !(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) { 158 wpa_printf(MSG_DEBUG, 159 "RRM: No network support for Neighbor Report."); 160 return -EOPNOTSUPP; 161 } 162 163 /* Refuse if there's a live request */ 164 if (wpa_s->rrm.notify_neighbor_rep) { 165 wpa_printf(MSG_DEBUG, 166 "RRM: Currently handling previous Neighbor Report."); 167 return -EBUSY; 168 } 169 170 /* 3 = action category + action code + dialog token */ 171 buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) + 172 (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) + 173 (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0)); 174 if (buf == NULL) { 175 wpa_printf(MSG_DEBUG, 176 "RRM: Failed to allocate Neighbor Report Request"); 177 return -ENOMEM; 178 } 179 180 wpa_printf(MSG_DEBUG, "RRM: Neighbor report request (for %s), token=%d", 181 (ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""), 182 wpa_s->rrm.next_neighbor_rep_token); 183 184 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT); 185 wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST); 186 wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token); 187 if (ssid) { 188 wpabuf_put_u8(buf, WLAN_EID_SSID); 189 wpabuf_put_u8(buf, ssid->ssid_len); 190 wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len); 191 } 192 193 if (lci) { 194 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */ 195 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST); 196 wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN); 197 198 /* 199 * Measurement token; nonzero number that is unique among the 200 * Measurement Request elements in a particular frame. 201 */ 202 wpabuf_put_u8(buf, 1); /* Measurement Token */ 203 204 /* 205 * Parallel, Enable, Request, and Report bits are 0, Duration is 206 * reserved. 207 */ 208 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */ 209 wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */ 210 211 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */ 212 /* Location Subject */ 213 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE); 214 215 /* Optional Subelements */ 216 /* 217 * IEEE P802.11-REVmc/D5.0 Figure 9-170 218 * The Maximum Age subelement is required, otherwise the AP can 219 * send only data that was determined after receiving the 220 * request. Setting it here to unlimited age. 221 */ 222 wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE); 223 wpabuf_put_u8(buf, 2); 224 wpabuf_put_le16(buf, 0xffff); 225 } 226 227 if (civic) { 228 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */ 229 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST); 230 wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN); 231 232 /* 233 * Measurement token; nonzero number that is unique among the 234 * Measurement Request elements in a particular frame. 235 */ 236 wpabuf_put_u8(buf, 2); /* Measurement Token */ 237 238 /* 239 * Parallel, Enable, Request, and Report bits are 0, Duration is 240 * reserved. 241 */ 242 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */ 243 /* Measurement Type */ 244 wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC); 245 246 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.14: 247 * Location Civic request */ 248 /* Location Subject */ 249 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE); 250 wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */ 251 /* Location Service Interval Units: Seconds */ 252 wpabuf_put_u8(buf, 0); 253 /* Location Service Interval: 0 - Only one report is requested 254 */ 255 wpabuf_put_le16(buf, 0); 256 /* No optional subelements */ 257 } 258 259 wpa_s->rrm.next_neighbor_rep_token++; 260 261 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 262 wpa_s->own_addr, wpa_s->bssid, 263 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 264 wpa_printf(MSG_DEBUG, 265 "RRM: Failed to send Neighbor Report Request"); 266 wpabuf_free(buf); 267 return -ECANCELED; 268 } 269 270 wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx; 271 wpa_s->rrm.notify_neighbor_rep = cb; 272 eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0, 273 wpas_rrm_neighbor_rep_timeout_handler, 274 &wpa_s->rrm, NULL); 275 276 wpabuf_free(buf); 277 return 0; 278 } 279 280 281 static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type, 282 const u8 *data, size_t data_len) 283 { 284 if (wpabuf_resize(buf, 5 + data_len)) 285 return -1; 286 287 wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT); 288 wpabuf_put_u8(*buf, 3 + data_len); 289 wpabuf_put_u8(*buf, token); 290 wpabuf_put_u8(*buf, mode); 291 wpabuf_put_u8(*buf, type); 292 293 if (data_len) 294 wpabuf_put_data(*buf, data, data_len); 295 296 return 0; 297 } 298 299 300 static int 301 wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s, 302 const struct rrm_measurement_request_element *req, 303 struct wpabuf **buf) 304 { 305 u8 subject; 306 u16 max_age = 0; 307 struct os_reltime t, diff; 308 unsigned long diff_l; 309 const u8 *subelem; 310 const u8 *request = req->variable; 311 size_t len = req->len - 3; 312 313 if (len < 1) 314 return -1; 315 316 if (!wpa_s->lci) 317 goto reject; 318 319 subject = *request++; 320 len--; 321 322 wpa_printf(MSG_DEBUG, "Measurement request location subject=%u", 323 subject); 324 325 if (subject != LOCATION_SUBJECT_REMOTE) { 326 wpa_printf(MSG_INFO, 327 "Not building LCI report - bad location subject"); 328 return 0; 329 } 330 331 /* Subelements are formatted exactly like elements */ 332 wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len); 333 subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE); 334 if (subelem && subelem[1] == 2) 335 max_age = WPA_GET_LE16(subelem + 2); 336 337 if (os_get_reltime(&t)) 338 goto reject; 339 340 os_reltime_sub(&t, &wpa_s->lci_time, &diff); 341 /* LCI age is calculated in 10th of a second units. */ 342 diff_l = diff.sec * 10 + diff.usec / 100000; 343 344 if (max_age != 0xffff && max_age < diff_l) 345 goto reject; 346 347 if (wpas_rrm_report_elem(buf, req->token, 348 MEASUREMENT_REPORT_MODE_ACCEPT, req->type, 349 wpabuf_head_u8(wpa_s->lci), 350 wpabuf_len(wpa_s->lci)) < 0) { 351 wpa_printf(MSG_DEBUG, "Failed to add LCI report element"); 352 return -1; 353 } 354 355 return 0; 356 357 reject: 358 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 359 wpas_rrm_report_elem(buf, req->token, 360 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE, 361 req->type, NULL, 0) < 0) { 362 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 363 return -1; 364 } 365 366 return 0; 367 } 368 369 370 static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s, 371 const u8 *data, size_t len) 372 { 373 struct wpabuf *report = wpabuf_alloc(len + 3); 374 375 if (!report) 376 return; 377 378 wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT); 379 wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT); 380 wpabuf_put_u8(report, wpa_s->rrm.token); 381 382 wpabuf_put_data(report, data, len); 383 384 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 385 wpa_s->own_addr, wpa_s->bssid, 386 wpabuf_head(report), wpabuf_len(report), 0)) { 387 wpa_printf(MSG_ERROR, 388 "RRM: Radio measurement report failed: Sending Action frame failed"); 389 } 390 391 wpabuf_free(report); 392 } 393 394 395 static int wpas_rrm_beacon_rep_update_last_frame(u8 *pos, size_t len) 396 { 397 struct rrm_measurement_report_element *msr_rep; 398 u8 *end = pos + len; 399 u8 *msr_rep_end; 400 struct rrm_measurement_beacon_report *rep = NULL; 401 u8 *subelem; 402 403 /* Find the last beacon report element */ 404 while (end - pos >= (int) sizeof(*msr_rep)) { 405 msr_rep = (struct rrm_measurement_report_element *) pos; 406 msr_rep_end = pos + msr_rep->len + 2; 407 408 if (msr_rep->eid != WLAN_EID_MEASURE_REPORT || 409 msr_rep_end > end) { 410 /* Should not happen. This indicates a bug. */ 411 wpa_printf(MSG_ERROR, 412 "RRM: non-measurement report element in measurement report frame"); 413 return -1; 414 } 415 416 if (msr_rep->type == MEASURE_TYPE_BEACON) 417 rep = (struct rrm_measurement_beacon_report *) 418 msr_rep->variable; 419 420 pos += pos[1] + 2; 421 } 422 423 if (!rep) 424 return 0; 425 426 subelem = rep->variable; 427 while (subelem + 2 < msr_rep_end && 428 subelem[0] != WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION) 429 subelem += 2 + subelem[1]; 430 431 if (subelem + 2 < msr_rep_end && 432 subelem[0] == WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION && 433 subelem[1] == 1 && 434 subelem + BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN <= end) 435 subelem[2] = 1; 436 437 return 0; 438 } 439 440 441 static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s, 442 struct wpabuf *buf) 443 { 444 int len = wpabuf_len(buf); 445 u8 *pos = wpabuf_mhead_u8(buf), *next = pos; 446 447 #define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3) 448 449 while (len) { 450 int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len; 451 452 if (send_len == len) 453 wpas_rrm_beacon_rep_update_last_frame(pos, len); 454 455 if (send_len == len || 456 (send_len + next[1] + 2) > MPDU_REPORT_LEN) { 457 wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len); 458 len -= send_len; 459 pos = next; 460 } 461 462 if (len) 463 next += next[1] + 2; 464 } 465 #undef MPDU_REPORT_LEN 466 } 467 468 469 static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels, 470 int *freqs) 471 { 472 size_t i; 473 474 for (i = 0; i < num_primary_channels; i++) { 475 u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4; 476 477 freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan); 478 /* ieee80211_chan_to_freq() is not really meant for this 479 * conversion of 20 MHz primary channel numbers for wider VHT 480 * channels, so handle those as special cases here for now. */ 481 if (freqs[i] < 0 && 482 (op_class == 128 || op_class == 129 || op_class == 130)) 483 freqs[i] = 5000 + 5 * primary_chan; 484 if (freqs[i] < 0) { 485 wpa_printf(MSG_DEBUG, 486 "Beacon Report: Invalid channel %u", 487 chan); 488 return -1; 489 } 490 } 491 492 return 0; 493 } 494 495 496 static int * wpas_add_channels(const struct oper_class_map *op, 497 struct hostapd_hw_modes *mode, int active, 498 const u8 *channels, const u8 size) 499 { 500 int *freqs, *next_freq; 501 u8 num_primary_channels, i; 502 u8 num_chans; 503 504 num_chans = channels ? size : 505 (op->max_chan - op->min_chan) / op->inc + 1; 506 507 if (op->bw == BW80 || op->bw == BW80P80) 508 num_primary_channels = 4; 509 else if (op->bw == BW160) 510 num_primary_channels = 8; 511 else 512 num_primary_channels = 1; 513 514 /* one extra place for the zero-terminator */ 515 freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs)); 516 if (!freqs) { 517 wpa_printf(MSG_ERROR, 518 "Beacon Report: Failed to allocate freqs array"); 519 return NULL; 520 } 521 522 next_freq = freqs; 523 for (i = 0; i < num_chans; i++) { 524 u8 chan = channels ? channels[i] : op->min_chan + i * op->inc; 525 enum chan_allowed res = verify_channel(mode, chan, op->bw); 526 527 if (res == NOT_ALLOWED || (res == NO_IR && active)) 528 continue; 529 530 if (wpas_add_channel(op->op_class, chan, num_primary_channels, 531 next_freq) < 0) { 532 os_free(freqs); 533 return NULL; 534 } 535 536 next_freq += num_primary_channels; 537 } 538 539 if (!freqs[0]) { 540 os_free(freqs); 541 return NULL; 542 } 543 544 return freqs; 545 } 546 547 548 static int * wpas_op_class_freqs(const struct oper_class_map *op, 549 struct hostapd_hw_modes *mode, int active) 550 { 551 u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 }; 552 u8 channels_160mhz[] = { 50, 114 }; 553 554 /* 555 * When adding all channels in the operating class, 80 + 80 MHz 556 * operating classes are like 80 MHz channels because we add all valid 557 * channels anyway. 558 */ 559 if (op->bw == BW80 || op->bw == BW80P80) 560 return wpas_add_channels(op, mode, active, channels_80mhz, 561 ARRAY_SIZE(channels_80mhz)); 562 563 if (op->bw == BW160) 564 return wpas_add_channels(op, mode, active, channels_160mhz, 565 ARRAY_SIZE(channels_160mhz)); 566 567 return wpas_add_channels(op, mode, active, NULL, 0); 568 } 569 570 571 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active, 572 const char *country, const u8 *subelems, 573 size_t len) 574 { 575 int *freqs = NULL, *new_freqs; 576 const u8 *end = subelems + len; 577 578 while (end - subelems > 2) { 579 const struct oper_class_map *op; 580 const u8 *ap_chan_elem, *pos; 581 u8 left; 582 struct hostapd_hw_modes *mode; 583 584 ap_chan_elem = get_ie(subelems, end - subelems, 585 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL); 586 if (!ap_chan_elem) 587 break; 588 pos = ap_chan_elem + 2; 589 left = ap_chan_elem[1]; 590 if (left < 1) 591 break; 592 subelems = ap_chan_elem + 2 + left; 593 594 op = get_oper_class(country, *pos); 595 if (!op) { 596 wpa_printf(MSG_DEBUG, 597 "Beacon request: unknown operating class in AP Channel Report subelement %u", 598 *pos); 599 goto out; 600 } 601 pos++; 602 left--; 603 604 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode); 605 if (!mode) 606 continue; 607 608 /* 609 * For 80 + 80 MHz operating classes, this AP Channel Report 610 * element should be followed by another element specifying 611 * the second 80 MHz channel. For now just add this 80 MHz 612 * channel, the second 80 MHz channel will be added when the 613 * next element is parsed. 614 * TODO: Verify that this AP Channel Report element is followed 615 * by a corresponding AP Channel Report element as specified in 616 * IEEE Std 802.11-2016, 11.11.9.1. 617 */ 618 new_freqs = wpas_add_channels(op, mode, active, pos, left); 619 if (new_freqs) 620 int_array_concat(&freqs, new_freqs); 621 622 os_free(new_freqs); 623 } 624 625 return freqs; 626 out: 627 os_free(freqs); 628 return NULL; 629 } 630 631 632 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s, 633 u8 op_class, u8 chan, int active, 634 const u8 *subelems, size_t len) 635 { 636 int *freqs = NULL, *ext_freqs = NULL; 637 struct hostapd_hw_modes *mode; 638 const char *country = NULL; 639 const struct oper_class_map *op; 640 const u8 *elem; 641 642 if (!wpa_s->current_bss) 643 return NULL; 644 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 645 if (elem && elem[1] >= 2) 646 country = (const char *) (elem + 2); 647 648 op = get_oper_class(country, op_class); 649 if (!op) { 650 wpa_printf(MSG_DEBUG, 651 "Beacon request: invalid operating class %d", 652 op_class); 653 return NULL; 654 } 655 656 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode); 657 if (!mode) 658 return NULL; 659 660 switch (chan) { 661 case 0: 662 freqs = wpas_op_class_freqs(op, mode, active); 663 if (!freqs) 664 return NULL; 665 break; 666 case 255: 667 /* freqs will be added from AP channel subelements */ 668 break; 669 default: 670 freqs = wpas_add_channels(op, mode, active, &chan, 1); 671 if (!freqs) 672 return NULL; 673 break; 674 } 675 676 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems, 677 len); 678 if (ext_freqs) { 679 int_array_concat(&freqs, ext_freqs); 680 os_free(ext_freqs); 681 int_array_sort_unique(freqs); 682 } 683 684 return freqs; 685 } 686 687 688 static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len, 689 u8 *op_class, u8 *chan, u8 *phy_type) 690 { 691 const u8 *ie; 692 int sec_chan = 0, vht = 0; 693 struct ieee80211_ht_operation *ht_oper = NULL; 694 struct ieee80211_vht_operation *vht_oper = NULL; 695 u8 seg0, seg1; 696 697 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION); 698 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) { 699 u8 sec_chan_offset; 700 701 ht_oper = (struct ieee80211_ht_operation *) (ie + 2); 702 sec_chan_offset = ht_oper->ht_param & 703 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 704 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 705 sec_chan = 1; 706 else if (sec_chan_offset == 707 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 708 sec_chan = -1; 709 } 710 711 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION); 712 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) { 713 vht_oper = (struct ieee80211_vht_operation *) (ie + 2); 714 715 switch (vht_oper->vht_op_info_chwidth) { 716 case 1: 717 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx; 718 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx; 719 if (seg1 && abs(seg1 - seg0) == 8) 720 vht = VHT_CHANWIDTH_160MHZ; 721 else if (seg1) 722 vht = VHT_CHANWIDTH_80P80MHZ; 723 else 724 vht = VHT_CHANWIDTH_80MHZ; 725 break; 726 case 2: 727 vht = VHT_CHANWIDTH_160MHZ; 728 break; 729 case 3: 730 vht = VHT_CHANWIDTH_80P80MHZ; 731 break; 732 default: 733 vht = VHT_CHANWIDTH_USE_HT; 734 break; 735 } 736 } 737 738 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class, 739 chan) == NUM_HOSTAPD_MODES) { 740 wpa_printf(MSG_DEBUG, 741 "Cannot determine operating class and channel"); 742 return -1; 743 } 744 745 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL, 746 vht_oper != NULL); 747 if (*phy_type == PHY_TYPE_UNSPECIFIED) { 748 wpa_printf(MSG_DEBUG, "Cannot determine phy type"); 749 return -1; 750 } 751 752 return 0; 753 } 754 755 756 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids, 757 enum beacon_report_detail detail, 758 struct wpa_bss *bss, u8 *buf, 759 size_t buf_len, u8 **ies_buf, 760 size_t *ie_len, int add_fixed) 761 { 762 u8 *ies = *ies_buf; 763 size_t ies_len = *ie_len; 764 u8 *pos = buf; 765 int rem_len; 766 767 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) - 768 sizeof(struct rrm_measurement_report_element) - 2 - 769 REPORTED_FRAME_BODY_SUBELEM_LEN; 770 771 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 772 wpa_printf(MSG_DEBUG, 773 "Beacon Request: Invalid reporting detail: %d", 774 detail); 775 return -1; 776 } 777 778 if (detail == BEACON_REPORT_DETAIL_NONE) 779 return 0; 780 781 /* 782 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) + 783 * beacon interval(2) + capabilities(2) = 14 bytes 784 */ 785 if (add_fixed && buf_len < 14) 786 return -1; 787 788 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY; 789 /* The length will be filled later */ 790 pos++; 791 792 if (add_fixed) { 793 WPA_PUT_LE64(pos, bss->tsf); 794 pos += sizeof(bss->tsf); 795 WPA_PUT_LE16(pos, bss->beacon_int); 796 pos += 2; 797 WPA_PUT_LE16(pos, bss->caps); 798 pos += 2; 799 } 800 801 rem_len -= pos - buf; 802 803 /* 804 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame 805 * body subelement causes the element to exceed the maximum element 806 * size, the subelement is truncated so that the last IE is a complete 807 * IE. So even when required to report all IEs, add elements one after 808 * the other and stop once there is no more room in the measurement 809 * element. 810 */ 811 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) { 812 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS || 813 (eids && bitfield_is_set(eids, ies[0]))) { 814 u8 elen = ies[1]; 815 816 if (2 + elen > buf + buf_len - pos || 817 2 + elen > rem_len) 818 break; 819 820 *pos++ = ies[0]; 821 *pos++ = elen; 822 os_memcpy(pos, ies + 2, elen); 823 pos += elen; 824 rem_len -= 2 + elen; 825 } 826 827 ies_len -= 2 + ies[1]; 828 ies += 2 + ies[1]; 829 } 830 831 *ie_len = ies_len; 832 *ies_buf = ies; 833 834 /* Now the length is known */ 835 buf[1] = pos - buf - 2; 836 return pos - buf; 837 } 838 839 840 static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data, 841 struct wpa_bss *bss, 842 struct wpabuf **wpa_buf, 843 struct rrm_measurement_beacon_report *rep, 844 u8 **ie, size_t *ie_len, u8 idx) 845 { 846 int ret; 847 u8 *buf, *pos; 848 u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN + 849 (data->last_indication ? 850 BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0); 851 852 /* Maximum element length: Beacon Report element + Reported Frame Body 853 * subelement + all IEs of the reported Beacon frame + Reported Frame 854 * Body Fragment ID subelement */ 855 buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len); 856 if (!buf) 857 return -1; 858 859 os_memcpy(buf, rep, sizeof(*rep)); 860 861 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail, 862 bss, buf + sizeof(*rep), 863 14 + *ie_len, ie, ie_len, 864 idx == 0); 865 if (ret < 0) 866 goto out; 867 868 pos = buf + ret + sizeof(*rep); 869 pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID; 870 pos[1] = 2; 871 872 /* 873 * Only one Beacon Report Measurement is supported at a time, so 874 * the Beacon Report ID can always be set to 1. 875 */ 876 pos[2] = 1; 877 878 /* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7) 879 */ 880 pos[3] = idx; 881 if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len) 882 pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS; 883 else 884 pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS; 885 886 pos += REPORTED_FRAME_BODY_SUBELEM_LEN; 887 888 if (data->last_indication) { 889 pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION; 890 pos[1] = 1; 891 892 /* This field will be updated later if this is the last frame */ 893 pos[2] = 0; 894 } 895 896 ret = wpas_rrm_report_elem(wpa_buf, data->token, 897 MEASUREMENT_REPORT_MODE_ACCEPT, 898 MEASURE_TYPE_BEACON, buf, 899 ret + sizeof(*rep) + subelems_len); 900 out: 901 os_free(buf); 902 return ret; 903 } 904 905 906 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s, 907 struct wpabuf **wpa_buf, struct wpa_bss *bss, 908 u64 start, u64 parent_tsf) 909 { 910 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 911 u8 *ies = (u8 *) (bss + 1); 912 u8 *pos = ies; 913 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len; 914 struct rrm_measurement_beacon_report rep; 915 u8 idx = 0; 916 917 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 && 918 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0) 919 return 0; 920 921 if (data->ssid_len && 922 (data->ssid_len != bss->ssid_len || 923 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0)) 924 return 0; 925 926 if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class, 927 &rep.channel, &rep.report_info) < 0) 928 return 0; 929 930 rep.start_time = host_to_le64(start); 931 rep.duration = host_to_le16(data->scan_params.duration); 932 rep.rcpi = rssi_to_rcpi(bss->level); 933 rep.rsni = 255; /* 255 indicates that RSNI is not available */ 934 os_memcpy(rep.bssid, bss->bssid, ETH_ALEN); 935 rep.antenna_id = 0; /* unknown */ 936 rep.parent_tsf = host_to_le32(parent_tsf); 937 938 do { 939 int ret; 940 941 ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep, 942 &pos, &ies_len, idx++); 943 if (ret) 944 return ret; 945 } while (data->report_detail != BEACON_REPORT_DETAIL_NONE && 946 ies_len >= 2); 947 948 return 0; 949 } 950 951 952 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s, 953 struct wpabuf **buf) 954 { 955 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token, 956 MEASUREMENT_REPORT_MODE_ACCEPT, 957 MEASURE_TYPE_BEACON, NULL, 0); 958 } 959 960 961 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s, 962 struct wpabuf **buf) 963 { 964 size_t i; 965 966 for (i = 0; i < wpa_s->last_scan_res_used; i++) { 967 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i], 968 0, 0) < 0) 969 break; 970 } 971 972 if (!(*buf)) 973 wpas_beacon_rep_no_results(wpa_s, buf); 974 975 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf); 976 } 977 978 979 void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s) 980 { 981 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) { 982 struct wpabuf *buf = NULL; 983 984 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token, 985 MEASUREMENT_REPORT_MODE_REJECT_REFUSED, 986 MEASURE_TYPE_BEACON, NULL, 0)) { 987 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed"); 988 wpabuf_free(buf); 989 return; 990 } 991 992 wpas_rrm_send_msr_report(wpa_s, buf); 993 wpabuf_free(buf); 994 } 995 996 wpas_clear_beacon_rep_data(wpa_s); 997 } 998 999 1000 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1001 { 1002 struct wpa_supplicant *wpa_s = eloop_ctx; 1003 struct wpa_driver_scan_params *params = 1004 &wpa_s->beacon_rep_data.scan_params; 1005 u16 prev_duration = params->duration; 1006 1007 if (!wpa_s->current_bss) 1008 return; 1009 1010 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) && 1011 params->duration) { 1012 wpa_printf(MSG_DEBUG, 1013 "RRM: Cannot set scan duration due to missing driver support"); 1014 params->duration = 0; 1015 } 1016 os_get_reltime(&wpa_s->beacon_rep_scan); 1017 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) || 1018 wpa_supplicant_trigger_scan(wpa_s, params)) 1019 wpas_rrm_refuse_request(wpa_s); 1020 params->duration = prev_duration; 1021 } 1022 1023 1024 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s, 1025 struct beacon_rep_data *data, 1026 u8 sid, u8 slen, const u8 *subelem) 1027 { 1028 u8 report_info, i; 1029 1030 switch (sid) { 1031 case WLAN_BEACON_REQUEST_SUBELEM_SSID: 1032 if (!slen) { 1033 wpa_printf(MSG_DEBUG, 1034 "SSID subelement with zero length - wildcard SSID"); 1035 break; 1036 } 1037 1038 if (slen > SSID_MAX_LEN) { 1039 wpa_printf(MSG_DEBUG, 1040 "Invalid SSID subelement length: %u", slen); 1041 return -1; 1042 } 1043 1044 data->ssid_len = slen; 1045 os_memcpy(data->ssid, subelem, data->ssid_len); 1046 break; 1047 case WLAN_BEACON_REQUEST_SUBELEM_INFO: 1048 if (slen != 2) { 1049 wpa_printf(MSG_DEBUG, 1050 "Invalid reporting information subelement length: %u", 1051 slen); 1052 return -1; 1053 } 1054 1055 report_info = subelem[0]; 1056 if (report_info != 0) { 1057 wpa_printf(MSG_DEBUG, 1058 "reporting information=%u is not supported", 1059 report_info); 1060 return 0; 1061 } 1062 break; 1063 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL: 1064 if (slen != 1) { 1065 wpa_printf(MSG_DEBUG, 1066 "Invalid reporting detail subelement length: %u", 1067 slen); 1068 return -1; 1069 } 1070 1071 data->report_detail = subelem[0]; 1072 if (data->report_detail > 1073 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 1074 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u", 1075 subelem[0]); 1076 return -1; 1077 } 1078 1079 break; 1080 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST: 1081 if (data->report_detail != 1082 BEACON_REPORT_DETAIL_REQUESTED_ONLY) { 1083 wpa_printf(MSG_DEBUG, 1084 "Beacon request: request subelement is present but report detail is %u", 1085 data->report_detail); 1086 return -1; 1087 } 1088 1089 if (!slen) { 1090 wpa_printf(MSG_DEBUG, 1091 "Invalid request subelement length: %u", 1092 slen); 1093 return -1; 1094 } 1095 1096 if (data->eids) { 1097 wpa_printf(MSG_DEBUG, 1098 "Beacon Request: Request subelement appears more than once"); 1099 return -1; 1100 } 1101 1102 data->eids = bitfield_alloc(255); 1103 if (!data->eids) { 1104 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap"); 1105 return -1; 1106 } 1107 1108 for (i = 0; i < slen; i++) 1109 bitfield_set(data->eids, subelem[i]); 1110 break; 1111 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL: 1112 /* Skip - it will be processed when freqs are added */ 1113 break; 1114 case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION: 1115 if (slen != 1) { 1116 wpa_printf(MSG_DEBUG, 1117 "Beacon request: Invalid last indication request subelement length: %u", 1118 slen); 1119 return -1; 1120 } 1121 1122 data->last_indication = subelem[0]; 1123 break; 1124 default: 1125 wpa_printf(MSG_DEBUG, 1126 "Beacon request: Unknown subelement id %u", sid); 1127 break; 1128 } 1129 1130 return 1; 1131 } 1132 1133 1134 /** 1135 * Returns 0 if the next element can be processed, 1 if some operation was 1136 * triggered, and -1 if processing failed (i.e., the element is in invalid 1137 * format or an internal error occurred). 1138 */ 1139 static int 1140 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s, 1141 u8 elem_token, int duration_mandatory, 1142 const struct rrm_measurement_beacon_request *req, 1143 size_t len, struct wpabuf **buf) 1144 { 1145 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1146 struct wpa_driver_scan_params *params = &data->scan_params; 1147 const u8 *subelems; 1148 size_t elems_len; 1149 u16 rand_interval; 1150 u32 interval_usec; 1151 u32 _rand; 1152 int ret = 0, res; 1153 u8 reject_mode; 1154 1155 if (len < sizeof(*req)) 1156 return -1; 1157 1158 if (req->mode != BEACON_REPORT_MODE_PASSIVE && 1159 req->mode != BEACON_REPORT_MODE_ACTIVE && 1160 req->mode != BEACON_REPORT_MODE_TABLE) 1161 return 0; 1162 1163 subelems = req->variable; 1164 elems_len = len - sizeof(*req); 1165 rand_interval = le_to_host16(req->rand_interval); 1166 1167 os_free(params->freqs); 1168 os_memset(params, 0, sizeof(*params)); 1169 1170 data->token = elem_token; 1171 1172 /* default reporting detail is all fixed length fields and all 1173 * elements */ 1174 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS; 1175 os_memcpy(data->bssid, req->bssid, ETH_ALEN); 1176 1177 while (elems_len >= 2) { 1178 if (subelems[1] > elems_len - 2) { 1179 wpa_printf(MSG_DEBUG, 1180 "Beacon Request: Truncated subelement"); 1181 ret = -1; 1182 goto out; 1183 } 1184 1185 res = wpas_rm_handle_beacon_req_subelem( 1186 wpa_s, data, subelems[0], subelems[1], &subelems[2]); 1187 if (res < 0) { 1188 ret = res; 1189 goto out; 1190 } else if (!res) { 1191 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE; 1192 goto out_reject; 1193 } 1194 1195 elems_len -= 2 + subelems[1]; 1196 subelems += 2 + subelems[1]; 1197 } 1198 1199 if (req->mode == BEACON_REPORT_MODE_TABLE) { 1200 wpas_beacon_rep_table(wpa_s, buf); 1201 goto out; 1202 } 1203 1204 params->freqs = wpas_beacon_request_freqs( 1205 wpa_s, req->oper_class, req->channel, 1206 req->mode == BEACON_REPORT_MODE_ACTIVE, 1207 req->variable, len - sizeof(*req)); 1208 if (!params->freqs) { 1209 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels"); 1210 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED; 1211 goto out_reject; 1212 } 1213 1214 params->duration = le_to_host16(req->duration); 1215 params->duration_mandatory = duration_mandatory; 1216 if (!params->duration) { 1217 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0"); 1218 ret = -1; 1219 goto out; 1220 } 1221 1222 params->only_new_results = 1; 1223 1224 if (req->mode == BEACON_REPORT_MODE_ACTIVE) { 1225 params->ssids[params->num_ssids].ssid = data->ssid; 1226 params->ssids[params->num_ssids++].ssid_len = data->ssid_len; 1227 } 1228 1229 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0) 1230 _rand = os_random(); 1231 interval_usec = (_rand % (rand_interval + 1)) * 1024; 1232 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s, 1233 NULL); 1234 return 1; 1235 out_reject: 1236 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1237 wpas_rrm_report_elem(buf, elem_token, reject_mode, 1238 MEASURE_TYPE_BEACON, NULL, 0) < 0) { 1239 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1240 ret = -1; 1241 } 1242 out: 1243 wpas_clear_beacon_rep_data(wpa_s); 1244 return ret; 1245 } 1246 1247 1248 static int 1249 wpas_rrm_handle_msr_req_element( 1250 struct wpa_supplicant *wpa_s, 1251 const struct rrm_measurement_request_element *req, 1252 struct wpabuf **buf) 1253 { 1254 int duration_mandatory; 1255 1256 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d", 1257 req->type, req->token); 1258 1259 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) { 1260 /* Enable bit is not supported for now */ 1261 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore"); 1262 return 0; 1263 } 1264 1265 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) && 1266 req->type > MEASURE_TYPE_RPI_HIST) { 1267 /* Parallel measurements are not supported for now */ 1268 wpa_printf(MSG_DEBUG, 1269 "RRM: Parallel measurements are not supported, reject"); 1270 goto reject; 1271 } 1272 1273 duration_mandatory = 1274 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY); 1275 1276 switch (req->type) { 1277 case MEASURE_TYPE_LCI: 1278 return wpas_rrm_build_lci_report(wpa_s, req, buf); 1279 case MEASURE_TYPE_BEACON: 1280 if (duration_mandatory && 1281 !(wpa_s->drv_rrm_flags & 1282 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) { 1283 wpa_printf(MSG_DEBUG, 1284 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration"); 1285 goto reject; 1286 } 1287 return wpas_rm_handle_beacon_req(wpa_s, req->token, 1288 duration_mandatory, 1289 (const void *) req->variable, 1290 req->len - 3, buf); 1291 default: 1292 wpa_printf(MSG_INFO, 1293 "RRM: Unsupported radio measurement type %u", 1294 req->type); 1295 break; 1296 } 1297 1298 reject: 1299 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1300 wpas_rrm_report_elem(buf, req->token, 1301 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE, 1302 req->type, NULL, 0) < 0) { 1303 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1304 return -1; 1305 } 1306 1307 return 0; 1308 } 1309 1310 1311 static struct wpabuf * 1312 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos, 1313 size_t len) 1314 { 1315 struct wpabuf *buf = NULL; 1316 1317 while (len) { 1318 const struct rrm_measurement_request_element *req; 1319 int res; 1320 1321 if (len < 2) { 1322 wpa_printf(MSG_DEBUG, "RRM: Truncated element"); 1323 goto out; 1324 } 1325 1326 req = (const struct rrm_measurement_request_element *) pos; 1327 if (req->eid != WLAN_EID_MEASURE_REQUEST) { 1328 wpa_printf(MSG_DEBUG, 1329 "RRM: Expected Measurement Request element, but EID is %u", 1330 req->eid); 1331 goto out; 1332 } 1333 1334 if (req->len < 3) { 1335 wpa_printf(MSG_DEBUG, "RRM: Element length too short"); 1336 goto out; 1337 } 1338 1339 if (req->len > len - 2) { 1340 wpa_printf(MSG_DEBUG, "RRM: Element length too long"); 1341 goto out; 1342 } 1343 1344 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf); 1345 if (res < 0) 1346 goto out; 1347 1348 pos += req->len + 2; 1349 len -= req->len + 2; 1350 } 1351 1352 return buf; 1353 1354 out: 1355 wpabuf_free(buf); 1356 return NULL; 1357 } 1358 1359 1360 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s, 1361 const u8 *src, const u8 *dst, 1362 const u8 *frame, size_t len) 1363 { 1364 struct wpabuf *report; 1365 1366 if (wpa_s->wpa_state != WPA_COMPLETED) { 1367 wpa_printf(MSG_INFO, 1368 "RRM: Ignoring radio measurement request: Not associated"); 1369 return; 1370 } 1371 1372 if (!wpa_s->rrm.rrm_used) { 1373 wpa_printf(MSG_INFO, 1374 "RRM: Ignoring radio measurement request: Not RRM network"); 1375 return; 1376 } 1377 1378 if (len < 3) { 1379 wpa_printf(MSG_INFO, 1380 "RRM: Ignoring too short radio measurement request"); 1381 return; 1382 } 1383 1384 wpa_s->rrm.token = *frame; 1385 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN); 1386 1387 /* Number of repetitions is not supported */ 1388 1389 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3); 1390 if (!report) 1391 return; 1392 1393 wpas_rrm_send_msr_report(wpa_s, report); 1394 wpabuf_free(report); 1395 } 1396 1397 1398 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s, 1399 const u8 *src, 1400 const u8 *frame, size_t len, 1401 int rssi) 1402 { 1403 struct wpabuf *buf; 1404 const struct rrm_link_measurement_request *req; 1405 struct rrm_link_measurement_report report; 1406 1407 if (wpa_s->wpa_state != WPA_COMPLETED) { 1408 wpa_printf(MSG_INFO, 1409 "RRM: Ignoring link measurement request. Not associated"); 1410 return; 1411 } 1412 1413 if (!wpa_s->rrm.rrm_used) { 1414 wpa_printf(MSG_INFO, 1415 "RRM: Ignoring link measurement request. Not RRM network"); 1416 return; 1417 } 1418 1419 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) { 1420 wpa_printf(MSG_INFO, 1421 "RRM: Measurement report failed. TX power insertion not supported"); 1422 return; 1423 } 1424 1425 req = (const struct rrm_link_measurement_request *) frame; 1426 if (len < sizeof(*req)) { 1427 wpa_printf(MSG_INFO, 1428 "RRM: Link measurement report failed. Request too short"); 1429 return; 1430 } 1431 1432 os_memset(&report, 0, sizeof(report)); 1433 report.dialog_token = req->dialog_token; 1434 report.tpc.eid = WLAN_EID_TPC_REPORT; 1435 report.tpc.len = 2; 1436 /* Note: The driver is expected to update report.tpc.tx_power and 1437 * report.tpc.link_margin subfields when sending out this frame. 1438 * Similarly, the driver would need to update report.rx_ant_id and 1439 * report.tx_ant_id subfields. */ 1440 report.rsni = 255; /* 255 indicates that RSNI is not available */ 1441 report.rcpi = rssi_to_rcpi(rssi); 1442 1443 /* action_category + action_code */ 1444 buf = wpabuf_alloc(2 + sizeof(report)); 1445 if (buf == NULL) { 1446 wpa_printf(MSG_ERROR, 1447 "RRM: Link measurement report failed. Buffer allocation failed"); 1448 return; 1449 } 1450 1451 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT); 1452 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT); 1453 wpabuf_put_data(buf, &report, sizeof(report)); 1454 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf); 1455 1456 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src, 1457 wpa_s->own_addr, wpa_s->bssid, 1458 wpabuf_head(buf), wpabuf_len(buf), 0)) { 1459 wpa_printf(MSG_ERROR, 1460 "RRM: Link measurement report failed. Send action failed"); 1461 } 1462 wpabuf_free(buf); 1463 } 1464 1465 1466 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s, 1467 struct wpa_scan_results *scan_res, 1468 struct scan_info *info) 1469 { 1470 size_t i = 0; 1471 struct wpabuf *buf = NULL; 1472 1473 if (!wpa_s->beacon_rep_data.token) 1474 return 0; 1475 1476 if (!wpa_s->current_bss) 1477 goto out; 1478 1479 /* If the measurement was aborted, don't report partial results */ 1480 if (info->aborted) 1481 goto out; 1482 1483 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR, 1484 MAC2STR(info->scan_start_tsf_bssid), 1485 MAC2STR(wpa_s->current_bss->bssid)); 1486 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1487 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid, 1488 ETH_ALEN) != 0) { 1489 wpa_printf(MSG_DEBUG, 1490 "RRM: Ignore scan results due to mismatching TSF BSSID"); 1491 goto out; 1492 } 1493 1494 for (i = 0; i < scan_res->num; i++) { 1495 struct wpa_bss *bss = 1496 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid); 1497 1498 if (!bss) 1499 continue; 1500 1501 if ((wpa_s->drv_rrm_flags & 1502 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1503 os_memcmp(scan_res->res[i]->tsf_bssid, 1504 wpa_s->current_bss->bssid, ETH_ALEN) != 0) { 1505 wpa_printf(MSG_DEBUG, 1506 "RRM: Ignore scan result for " MACSTR 1507 " due to mismatching TSF BSSID" MACSTR, 1508 MAC2STR(scan_res->res[i]->bssid), 1509 MAC2STR(scan_res->res[i]->tsf_bssid)); 1510 continue; 1511 } 1512 1513 /* 1514 * Don't report results that were not received during the 1515 * current measurement. 1516 */ 1517 if (!(wpa_s->drv_rrm_flags & 1518 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) { 1519 struct os_reltime update_time, diff; 1520 1521 /* For now, allow 8 ms older results due to some 1522 * unknown issue with cfg80211 BSS table updates during 1523 * a scan with the current BSS. 1524 * TODO: Fix this more properly to avoid having to have 1525 * this type of hacks in place. */ 1526 calculate_update_time(&scan_res->fetch_time, 1527 scan_res->res[i]->age, 1528 &update_time); 1529 os_reltime_sub(&wpa_s->beacon_rep_scan, 1530 &update_time, &diff); 1531 if (os_reltime_before(&update_time, 1532 &wpa_s->beacon_rep_scan) && 1533 (diff.sec || diff.usec >= 8000)) { 1534 wpa_printf(MSG_DEBUG, 1535 "RRM: Ignore scan result for " MACSTR 1536 " due to old update (age(ms) %u, calculated age %u.%06u seconds)", 1537 MAC2STR(scan_res->res[i]->bssid), 1538 scan_res->res[i]->age, 1539 (unsigned int) diff.sec, 1540 (unsigned int) diff.usec); 1541 continue; 1542 } 1543 } else if (info->scan_start_tsf > 1544 scan_res->res[i]->parent_tsf) { 1545 continue; 1546 } 1547 1548 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf, 1549 scan_res->res[i]->parent_tsf) < 0) 1550 break; 1551 } 1552 1553 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf)) 1554 goto out; 1555 1556 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf); 1557 1558 wpas_rrm_send_msr_report(wpa_s, buf); 1559 wpabuf_free(buf); 1560 1561 out: 1562 wpas_clear_beacon_rep_data(wpa_s); 1563 return 1; 1564 } 1565 1566 1567 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s) 1568 { 1569 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1570 1571 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL); 1572 bitfield_free(data->eids); 1573 os_free(data->scan_params.freqs); 1574 os_memset(data, 0, sizeof(*data)); 1575 } 1576
