1 /* 2 * wpa_supplicant - Radio Measurements 3 * Copyright (c) 2003-2016, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "common/ieee802_11_common.h" 14 #include "wpa_supplicant_i.h" 15 #include "driver_i.h" 16 #include "bss.h" 17 #include "scan.h" 18 #include "p2p_supplicant.h" 19 20 21 static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx) 22 { 23 struct rrm_data *rrm = data; 24 25 if (!rrm->notify_neighbor_rep) { 26 wpa_printf(MSG_ERROR, 27 "RRM: Unexpected neighbor report timeout"); 28 return; 29 } 30 31 wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report - NONE"); 32 rrm->notify_neighbor_rep(rrm->neighbor_rep_cb_ctx, NULL); 33 34 rrm->notify_neighbor_rep = NULL; 35 rrm->neighbor_rep_cb_ctx = NULL; 36 } 37 38 39 /* 40 * wpas_rrm_reset - Clear and reset all RRM data in wpa_supplicant 41 * @wpa_s: Pointer to wpa_supplicant 42 */ 43 void wpas_rrm_reset(struct wpa_supplicant *wpa_s) 44 { 45 wpa_s->rrm.rrm_used = 0; 46 47 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm, 48 NULL); 49 if (wpa_s->rrm.notify_neighbor_rep) 50 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL); 51 wpa_s->rrm.next_neighbor_rep_token = 1; 52 wpas_clear_beacon_rep_data(wpa_s); 53 } 54 55 56 /* 57 * wpas_rrm_process_neighbor_rep - Handle incoming neighbor report 58 * @wpa_s: Pointer to wpa_supplicant 59 * @report: Neighbor report buffer, prefixed by a 1-byte dialog token 60 * @report_len: Length of neighbor report buffer 61 */ 62 void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s, 63 const u8 *report, size_t report_len) 64 { 65 struct wpabuf *neighbor_rep; 66 67 wpa_hexdump(MSG_DEBUG, "RRM: New Neighbor Report", report, report_len); 68 if (report_len < 1) 69 return; 70 71 if (report[0] != wpa_s->rrm.next_neighbor_rep_token - 1) { 72 wpa_printf(MSG_DEBUG, 73 "RRM: Discarding neighbor report with token %d (expected %d)", 74 report[0], wpa_s->rrm.next_neighbor_rep_token - 1); 75 return; 76 } 77 78 eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm, 79 NULL); 80 81 if (!wpa_s->rrm.notify_neighbor_rep) { 82 wpa_msg(wpa_s, MSG_INFO, "RRM: Unexpected neighbor report"); 83 return; 84 } 85 86 /* skipping the first byte, which is only an id (dialog token) */ 87 neighbor_rep = wpabuf_alloc(report_len - 1); 88 if (!neighbor_rep) { 89 wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL); 90 return; 91 } 92 wpabuf_put_data(neighbor_rep, report + 1, report_len - 1); 93 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: Notifying neighbor report (token = %d)", 94 report[0]); 95 wpa_s->rrm.notify_neighbor_rep(wpa_s->rrm.neighbor_rep_cb_ctx, 96 neighbor_rep); 97 wpa_s->rrm.notify_neighbor_rep = NULL; 98 wpa_s->rrm.neighbor_rep_cb_ctx = NULL; 99 } 100 101 102 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS) 103 /* Workaround different, undefined for Windows, error codes used here */ 104 #ifndef ENOTCONN 105 #define ENOTCONN -1 106 #endif 107 #ifndef EOPNOTSUPP 108 #define EOPNOTSUPP -1 109 #endif 110 #ifndef ECANCELED 111 #define ECANCELED -1 112 #endif 113 #endif 114 115 /* Measurement Request element + Location Subject + Maximum Age subelement */ 116 #define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4) 117 /* Measurement Request element + Location Civic Request */ 118 #define MEASURE_REQUEST_CIVIC_LEN (3 + 5) 119 120 121 /** 122 * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP 123 * @wpa_s: Pointer to wpa_supplicant 124 * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE 125 * is sent in the request. 126 * @lci: if set, neighbor request will include LCI request 127 * @civic: if set, neighbor request will include civic location request 128 * @cb: Callback function to be called once the requested report arrives, or 129 * timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds. 130 * In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's 131 * the requester's responsibility to free it. 132 * In the latter case NULL will be sent in 'neighbor_rep'. 133 * @cb_ctx: Context value to send the callback function 134 * Returns: 0 in case of success, negative error code otherwise 135 * 136 * In case there is a previous request which has not been answered yet, the 137 * new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT. 138 * Request must contain a callback function. 139 */ 140 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s, 141 const struct wpa_ssid_value *ssid, 142 int lci, int civic, 143 void (*cb)(void *ctx, 144 struct wpabuf *neighbor_rep), 145 void *cb_ctx) 146 { 147 struct wpabuf *buf; 148 const u8 *rrm_ie; 149 150 if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) { 151 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No connection, no RRM."); 152 return -ENOTCONN; 153 } 154 155 if (!wpa_s->rrm.rrm_used) { 156 wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No RRM in current connection."); 157 return -EOPNOTSUPP; 158 } 159 160 rrm_ie = wpa_bss_get_ie(wpa_s->current_bss, 161 WLAN_EID_RRM_ENABLED_CAPABILITIES); 162 if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) || 163 !(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) { 164 wpa_dbg(wpa_s, MSG_DEBUG, 165 "RRM: No network support for Neighbor Report."); 166 return -EOPNOTSUPP; 167 } 168 169 /* Refuse if there's a live request */ 170 if (wpa_s->rrm.notify_neighbor_rep) { 171 wpa_dbg(wpa_s, MSG_DEBUG, 172 "RRM: Currently handling previous Neighbor Report."); 173 return -EBUSY; 174 } 175 176 /* 3 = action category + action code + dialog token */ 177 buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) + 178 (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) + 179 (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0)); 180 if (buf == NULL) { 181 wpa_dbg(wpa_s, MSG_DEBUG, 182 "RRM: Failed to allocate Neighbor Report Request"); 183 return -ENOMEM; 184 } 185 186 wpa_dbg(wpa_s, MSG_DEBUG, 187 "RRM: Neighbor report request (for %s), token=%d", 188 (ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""), 189 wpa_s->rrm.next_neighbor_rep_token); 190 191 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT); 192 wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST); 193 wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token); 194 if (ssid) { 195 wpabuf_put_u8(buf, WLAN_EID_SSID); 196 wpabuf_put_u8(buf, ssid->ssid_len); 197 wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len); 198 } 199 200 if (lci) { 201 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */ 202 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST); 203 wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN); 204 205 /* 206 * Measurement token; nonzero number that is unique among the 207 * Measurement Request elements in a particular frame. 208 */ 209 wpabuf_put_u8(buf, 1); /* Measurement Token */ 210 211 /* 212 * Parallel, Enable, Request, and Report bits are 0, Duration is 213 * reserved. 214 */ 215 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */ 216 wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */ 217 218 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */ 219 /* Location Subject */ 220 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE); 221 222 /* Optional Subelements */ 223 /* 224 * IEEE P802.11-REVmc/D5.0 Figure 9-170 225 * The Maximum Age subelement is required, otherwise the AP can 226 * send only data that was determined after receiving the 227 * request. Setting it here to unlimited age. 228 */ 229 wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE); 230 wpabuf_put_u8(buf, 2); 231 wpabuf_put_le16(buf, 0xffff); 232 } 233 234 if (civic) { 235 /* IEEE P802.11-REVmc/D5.0 9.4.2.21 */ 236 wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST); 237 wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN); 238 239 /* 240 * Measurement token; nonzero number that is unique among the 241 * Measurement Request elements in a particular frame. 242 */ 243 wpabuf_put_u8(buf, 2); /* Measurement Token */ 244 245 /* 246 * Parallel, Enable, Request, and Report bits are 0, Duration is 247 * reserved. 248 */ 249 wpabuf_put_u8(buf, 0); /* Measurement Request Mode */ 250 /* Measurement Type */ 251 wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC); 252 253 /* IEEE P802.11-REVmc/D5.0 9.4.2.21.14: 254 * Location Civic request */ 255 /* Location Subject */ 256 wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE); 257 wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */ 258 /* Location Service Interval Units: Seconds */ 259 wpabuf_put_u8(buf, 0); 260 /* Location Service Interval: 0 - Only one report is requested 261 */ 262 wpabuf_put_le16(buf, 0); 263 /* No optional subelements */ 264 } 265 266 wpa_s->rrm.next_neighbor_rep_token++; 267 268 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 269 wpa_s->own_addr, wpa_s->bssid, 270 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { 271 wpa_dbg(wpa_s, MSG_DEBUG, 272 "RRM: Failed to send Neighbor Report Request"); 273 wpabuf_free(buf); 274 return -ECANCELED; 275 } 276 277 wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx; 278 wpa_s->rrm.notify_neighbor_rep = cb; 279 eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0, 280 wpas_rrm_neighbor_rep_timeout_handler, 281 &wpa_s->rrm, NULL); 282 283 wpabuf_free(buf); 284 return 0; 285 } 286 287 288 static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type, 289 const u8 *data, size_t data_len) 290 { 291 if (wpabuf_resize(buf, 5 + data_len)) 292 return -1; 293 294 wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT); 295 wpabuf_put_u8(*buf, 3 + data_len); 296 wpabuf_put_u8(*buf, token); 297 wpabuf_put_u8(*buf, mode); 298 wpabuf_put_u8(*buf, type); 299 300 if (data_len) 301 wpabuf_put_data(*buf, data, data_len); 302 303 return 0; 304 } 305 306 307 static int 308 wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s, 309 const struct rrm_measurement_request_element *req, 310 struct wpabuf **buf) 311 { 312 u8 subject; 313 u16 max_age = 0; 314 struct os_reltime t, diff; 315 unsigned long diff_l; 316 const u8 *subelem; 317 const u8 *request = req->variable; 318 size_t len = req->len - 3; 319 320 if (len < 1) 321 return -1; 322 323 if (!wpa_s->lci) 324 goto reject; 325 326 subject = *request++; 327 len--; 328 329 wpa_printf(MSG_DEBUG, "Measurement request location subject=%u", 330 subject); 331 332 if (subject != LOCATION_SUBJECT_REMOTE) { 333 wpa_printf(MSG_INFO, 334 "Not building LCI report - bad location subject"); 335 return 0; 336 } 337 338 /* Subelements are formatted exactly like elements */ 339 wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len); 340 subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE); 341 if (subelem && subelem[1] == 2) 342 max_age = WPA_GET_LE16(subelem + 2); 343 344 if (os_get_reltime(&t)) 345 goto reject; 346 347 os_reltime_sub(&t, &wpa_s->lci_time, &diff); 348 /* LCI age is calculated in 10th of a second units. */ 349 diff_l = diff.sec * 10 + diff.usec / 100000; 350 351 if (max_age != 0xffff && max_age < diff_l) 352 goto reject; 353 354 if (wpas_rrm_report_elem(buf, req->token, 355 MEASUREMENT_REPORT_MODE_ACCEPT, req->type, 356 wpabuf_head_u8(wpa_s->lci), 357 wpabuf_len(wpa_s->lci)) < 0) { 358 wpa_printf(MSG_DEBUG, "Failed to add LCI report element"); 359 return -1; 360 } 361 362 return 0; 363 364 reject: 365 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 366 wpas_rrm_report_elem(buf, req->token, 367 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE, 368 req->type, NULL, 0) < 0) { 369 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 370 return -1; 371 } 372 373 return 0; 374 } 375 376 377 static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s, 378 const u8 *data, size_t len) 379 { 380 struct wpabuf *report = wpabuf_alloc(len + 3); 381 382 if (!report) 383 return; 384 385 wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT); 386 wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT); 387 wpabuf_put_u8(report, wpa_s->rrm.token); 388 389 wpabuf_put_data(report, data, len); 390 391 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, 392 wpa_s->own_addr, wpa_s->bssid, 393 wpabuf_head(report), wpabuf_len(report), 0)) { 394 wpa_printf(MSG_ERROR, 395 "RRM: Radio measurement report failed: Sending Action frame failed"); 396 } 397 398 wpabuf_free(report); 399 } 400 401 402 static int wpas_rrm_beacon_rep_update_last_frame(u8 *pos, size_t len) 403 { 404 struct rrm_measurement_report_element *msr_rep; 405 u8 *end = pos + len; 406 u8 *msr_rep_end; 407 struct rrm_measurement_beacon_report *rep = NULL; 408 u8 *subelem; 409 410 /* Find the last beacon report element */ 411 while (end - pos >= (int) sizeof(*msr_rep)) { 412 msr_rep = (struct rrm_measurement_report_element *) pos; 413 msr_rep_end = pos + msr_rep->len + 2; 414 415 if (msr_rep->eid != WLAN_EID_MEASURE_REPORT || 416 msr_rep_end > end) { 417 /* Should not happen. This indicates a bug. */ 418 wpa_printf(MSG_ERROR, 419 "RRM: non-measurement report element in measurement report frame"); 420 return -1; 421 } 422 423 if (msr_rep->type == MEASURE_TYPE_BEACON) 424 rep = (struct rrm_measurement_beacon_report *) 425 msr_rep->variable; 426 427 pos += pos[1] + 2; 428 } 429 430 if (!rep) 431 return 0; 432 433 subelem = rep->variable; 434 while (subelem + 2 < msr_rep_end && 435 subelem[0] != WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION) 436 subelem += 2 + subelem[1]; 437 438 if (subelem + 2 < msr_rep_end && 439 subelem[0] == WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION && 440 subelem[1] == 1 && 441 subelem + BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN <= end) 442 subelem[2] = 1; 443 444 return 0; 445 } 446 447 448 static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s, 449 struct wpabuf *buf) 450 { 451 int len = wpabuf_len(buf); 452 u8 *pos = wpabuf_mhead_u8(buf), *next = pos; 453 454 #define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3) 455 456 while (len) { 457 int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len; 458 459 if (send_len == len) 460 wpas_rrm_beacon_rep_update_last_frame(pos, len); 461 462 if (send_len == len || 463 (send_len + next[1] + 2) > MPDU_REPORT_LEN) { 464 wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len); 465 len -= send_len; 466 pos = next; 467 } 468 469 if (len) 470 next += next[1] + 2; 471 } 472 #undef MPDU_REPORT_LEN 473 } 474 475 476 static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels, 477 int *freqs) 478 { 479 size_t i; 480 481 for (i = 0; i < num_primary_channels; i++) { 482 u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4; 483 484 freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan); 485 /* ieee80211_chan_to_freq() is not really meant for this 486 * conversion of 20 MHz primary channel numbers for wider VHT 487 * channels, so handle those as special cases here for now. */ 488 if (freqs[i] < 0 && 489 (op_class == 128 || op_class == 129 || op_class == 130)) 490 freqs[i] = 5000 + 5 * primary_chan; 491 if (freqs[i] < 0) { 492 wpa_printf(MSG_DEBUG, 493 "Beacon Report: Invalid channel %u", 494 chan); 495 return -1; 496 } 497 } 498 499 return 0; 500 } 501 502 503 static int * wpas_add_channels(const struct oper_class_map *op, 504 struct hostapd_hw_modes *mode, int active, 505 const u8 *channels, const u8 size) 506 { 507 int *freqs, *next_freq; 508 u8 num_primary_channels, i; 509 u8 num_chans; 510 511 num_chans = channels ? size : 512 (op->max_chan - op->min_chan) / op->inc + 1; 513 514 if (op->bw == BW80 || op->bw == BW80P80) 515 num_primary_channels = 4; 516 else if (op->bw == BW160) 517 num_primary_channels = 8; 518 else 519 num_primary_channels = 1; 520 521 /* one extra place for the zero-terminator */ 522 freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs)); 523 if (!freqs) { 524 wpa_printf(MSG_ERROR, 525 "Beacon Report: Failed to allocate freqs array"); 526 return NULL; 527 } 528 529 next_freq = freqs; 530 for (i = 0; i < num_chans; i++) { 531 u8 chan = channels ? channels[i] : op->min_chan + i * op->inc; 532 enum chan_allowed res = verify_channel(mode, op->op_class, chan, 533 op->bw); 534 535 if (res == NOT_ALLOWED || (res == NO_IR && active)) 536 continue; 537 538 if (wpas_add_channel(op->op_class, chan, num_primary_channels, 539 next_freq) < 0) { 540 os_free(freqs); 541 return NULL; 542 } 543 544 next_freq += num_primary_channels; 545 } 546 547 if (!freqs[0]) { 548 os_free(freqs); 549 return NULL; 550 } 551 552 return freqs; 553 } 554 555 556 static int * wpas_op_class_freqs(const struct oper_class_map *op, 557 struct hostapd_hw_modes *mode, int active) 558 { 559 u8 channels_80mhz_5ghz[] = { 42, 58, 106, 122, 138, 155, 171 }; 560 u8 channels_160mhz_5ghz[] = { 50, 114, 163 }; 561 u8 channels_80mhz_6ghz[] = { 7, 23, 39, 55, 71, 87, 103, 119, 135, 151, 562 167, 183, 199, 215 }; 563 u8 channels_160mhz_6ghz[] = { 15, 47, 79, 111, 143, 175, 207 }; 564 const u8 *channels = NULL; 565 size_t num_chan = 0; 566 bool is_6ghz = is_6ghz_op_class(op->op_class); 567 568 /* 569 * When adding all channels in the operating class, 80 + 80 MHz 570 * operating classes are like 80 MHz channels because we add all valid 571 * channels anyway. 572 */ 573 if (op->bw == BW80 || op->bw == BW80P80) { 574 channels = is_6ghz ? channels_80mhz_6ghz : channels_80mhz_5ghz; 575 num_chan = is_6ghz ? ARRAY_SIZE(channels_80mhz_6ghz) : 576 ARRAY_SIZE(channels_80mhz_5ghz); 577 } else if (op->bw == BW160) { 578 channels = is_6ghz ? channels_160mhz_6ghz : 579 channels_160mhz_5ghz; 580 num_chan = is_6ghz ? ARRAY_SIZE(channels_160mhz_6ghz) : 581 ARRAY_SIZE(channels_160mhz_5ghz); 582 } 583 584 return wpas_add_channels(op, mode, active, channels, num_chan); 585 } 586 587 588 static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active, 589 const char *country, const u8 *subelems, 590 size_t len) 591 { 592 int *freqs = NULL, *new_freqs; 593 const u8 *end = subelems + len; 594 595 while (end - subelems > 2) { 596 const struct oper_class_map *op; 597 const u8 *ap_chan_elem, *pos; 598 u8 left; 599 struct hostapd_hw_modes *mode; 600 601 ap_chan_elem = get_ie(subelems, end - subelems, 602 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL); 603 if (!ap_chan_elem) 604 break; 605 pos = ap_chan_elem + 2; 606 left = ap_chan_elem[1]; 607 if (left < 1) 608 break; 609 subelems = ap_chan_elem + 2 + left; 610 611 op = get_oper_class(country, *pos); 612 if (!op) { 613 wpa_printf(MSG_DEBUG, 614 "Beacon request: unknown operating class in AP Channel Report subelement %u", 615 *pos); 616 goto out; 617 } 618 pos++; 619 left--; 620 621 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode, 622 is_6ghz_op_class(op->op_class)); 623 if (!mode) 624 continue; 625 626 /* 627 * For 80 + 80 MHz operating classes, this AP Channel Report 628 * element should be followed by another element specifying 629 * the second 80 MHz channel. For now just add this 80 MHz 630 * channel, the second 80 MHz channel will be added when the 631 * next element is parsed. 632 * TODO: Verify that this AP Channel Report element is followed 633 * by a corresponding AP Channel Report element as specified in 634 * IEEE Std 802.11-2016, 11.11.9.1. 635 */ 636 new_freqs = wpas_add_channels(op, mode, active, pos, left); 637 if (new_freqs) 638 int_array_concat(&freqs, new_freqs); 639 640 os_free(new_freqs); 641 } 642 643 return freqs; 644 out: 645 os_free(freqs); 646 return NULL; 647 } 648 649 650 static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s, 651 u8 op_class, u8 chan, int active, 652 const u8 *subelems, size_t len) 653 { 654 int *freqs = NULL, *ext_freqs = NULL; 655 struct hostapd_hw_modes *mode; 656 const char *country = NULL; 657 const struct oper_class_map *op; 658 const u8 *elem; 659 660 if (!wpa_s->current_bss) 661 return NULL; 662 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 663 if (elem && elem[1] >= 2) 664 country = (const char *) (elem + 2); 665 666 op = get_oper_class(country, op_class); 667 if (!op) { 668 wpa_printf(MSG_DEBUG, 669 "Beacon request: invalid operating class %d", 670 op_class); 671 return NULL; 672 } 673 674 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode, 675 is_6ghz_op_class(op->op_class)); 676 if (!mode) 677 return NULL; 678 679 switch (chan) { 680 case 0: 681 freqs = wpas_op_class_freqs(op, mode, active); 682 if (!freqs) 683 return NULL; 684 break; 685 case 255: 686 /* freqs will be added from AP channel subelements */ 687 break; 688 default: 689 freqs = wpas_add_channels(op, mode, active, &chan, 1); 690 if (!freqs) 691 return NULL; 692 break; 693 } 694 695 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems, 696 len); 697 if (ext_freqs) { 698 int_array_concat(&freqs, ext_freqs); 699 os_free(ext_freqs); 700 int_array_sort_unique(freqs); 701 } 702 703 return freqs; 704 } 705 706 707 int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len, 708 u8 *op_class, u8 *chan, u8 *phy_type) 709 { 710 const u8 *ie; 711 int sec_chan = 0, vht = 0; 712 struct ieee80211_ht_operation *ht_oper = NULL; 713 struct ieee80211_vht_operation *vht_oper = NULL; 714 u8 seg0, seg1; 715 716 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION); 717 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) { 718 u8 sec_chan_offset; 719 720 ht_oper = (struct ieee80211_ht_operation *) (ie + 2); 721 sec_chan_offset = ht_oper->ht_param & 722 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 723 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 724 sec_chan = 1; 725 else if (sec_chan_offset == 726 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 727 sec_chan = -1; 728 } 729 730 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION); 731 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) { 732 vht_oper = (struct ieee80211_vht_operation *) (ie + 2); 733 734 switch (vht_oper->vht_op_info_chwidth) { 735 case 1: 736 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx; 737 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx; 738 if (seg1 && abs(seg1 - seg0) == 8) 739 vht = CHANWIDTH_160MHZ; 740 else if (seg1) 741 vht = CHANWIDTH_80P80MHZ; 742 else 743 vht = CHANWIDTH_80MHZ; 744 break; 745 case 2: 746 vht = CHANWIDTH_160MHZ; 747 break; 748 case 3: 749 vht = CHANWIDTH_80P80MHZ; 750 break; 751 default: 752 vht = CHANWIDTH_USE_HT; 753 break; 754 } 755 } 756 757 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class, 758 chan) == NUM_HOSTAPD_MODES) { 759 wpa_printf(MSG_DEBUG, 760 "Cannot determine operating class and channel"); 761 return -1; 762 } 763 764 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL, 765 vht_oper != NULL); 766 if (*phy_type == PHY_TYPE_UNSPECIFIED) { 767 wpa_printf(MSG_DEBUG, "Cannot determine phy type"); 768 return -1; 769 } 770 771 return 0; 772 } 773 774 775 static int wpas_beacon_rep_add_frame_body(struct bitfield *eids, 776 enum beacon_report_detail detail, 777 struct wpa_bss *bss, u8 *buf, 778 size_t buf_len, const u8 **ies_buf, 779 size_t *ie_len, int add_fixed) 780 { 781 const u8 *ies = *ies_buf; 782 size_t ies_len = *ie_len; 783 u8 *pos = buf; 784 int rem_len; 785 786 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) - 787 sizeof(struct rrm_measurement_report_element) - 2 - 788 REPORTED_FRAME_BODY_SUBELEM_LEN; 789 790 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 791 wpa_printf(MSG_DEBUG, 792 "Beacon Request: Invalid reporting detail: %d", 793 detail); 794 return -1; 795 } 796 797 if (detail == BEACON_REPORT_DETAIL_NONE) 798 return 0; 799 800 /* 801 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) + 802 * beacon interval(2) + capabilities(2) = 14 bytes 803 */ 804 if (add_fixed && buf_len < 14) 805 return -1; 806 807 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY; 808 /* The length will be filled later */ 809 pos++; 810 811 if (add_fixed) { 812 WPA_PUT_LE64(pos, bss->tsf); 813 pos += sizeof(bss->tsf); 814 WPA_PUT_LE16(pos, bss->beacon_int); 815 pos += 2; 816 WPA_PUT_LE16(pos, bss->caps); 817 pos += 2; 818 } 819 820 rem_len -= pos - buf; 821 822 /* 823 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame 824 * body subelement causes the element to exceed the maximum element 825 * size, the subelement is truncated so that the last IE is a complete 826 * IE. So even when required to report all IEs, add elements one after 827 * the other and stop once there is no more room in the measurement 828 * element. 829 */ 830 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) { 831 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS || 832 (eids && bitfield_is_set(eids, ies[0]))) { 833 u8 elen = ies[1]; 834 835 if (2 + elen > buf + buf_len - pos || 836 2 + elen > rem_len) 837 break; 838 839 *pos++ = ies[0]; 840 *pos++ = elen; 841 os_memcpy(pos, ies + 2, elen); 842 pos += elen; 843 rem_len -= 2 + elen; 844 } 845 846 ies_len -= 2 + ies[1]; 847 ies += 2 + ies[1]; 848 } 849 850 *ie_len = ies_len; 851 *ies_buf = ies; 852 853 /* Now the length is known */ 854 buf[1] = pos - buf - 2; 855 return pos - buf; 856 } 857 858 859 static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data, 860 struct wpa_bss *bss, 861 struct wpabuf **wpa_buf, 862 struct rrm_measurement_beacon_report *rep, 863 const u8 **ie, size_t *ie_len, u8 idx) 864 { 865 int ret; 866 u8 *buf, *pos; 867 u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN + 868 (data->last_indication ? 869 BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0); 870 871 /* Maximum element length: Beacon Report element + Reported Frame Body 872 * subelement + all IEs of the reported Beacon frame + Reported Frame 873 * Body Fragment ID subelement */ 874 buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len); 875 if (!buf) 876 return -1; 877 878 os_memcpy(buf, rep, sizeof(*rep)); 879 880 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail, 881 bss, buf + sizeof(*rep), 882 14 + *ie_len, ie, ie_len, 883 idx == 0); 884 if (ret < 0) 885 goto out; 886 887 pos = buf + ret + sizeof(*rep); 888 pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID; 889 pos[1] = 2; 890 891 /* 892 * Only one Beacon Report Measurement is supported at a time, so 893 * the Beacon Report ID can always be set to 1. 894 */ 895 pos[2] = 1; 896 897 /* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7) 898 */ 899 pos[3] = idx; 900 if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len) 901 pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS; 902 else 903 pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS; 904 905 pos += REPORTED_FRAME_BODY_SUBELEM_LEN; 906 907 if (data->last_indication) { 908 pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION; 909 pos[1] = 1; 910 911 /* This field will be updated later if this is the last frame */ 912 pos[2] = 0; 913 } 914 915 ret = wpas_rrm_report_elem(wpa_buf, data->token, 916 MEASUREMENT_REPORT_MODE_ACCEPT, 917 MEASURE_TYPE_BEACON, buf, 918 ret + sizeof(*rep) + subelems_len); 919 out: 920 os_free(buf); 921 return ret; 922 } 923 924 925 static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s, 926 struct wpabuf **wpa_buf, struct wpa_bss *bss, 927 u64 start, u64 parent_tsf) 928 { 929 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 930 const u8 *ies = wpa_bss_ie_ptr(bss); 931 const u8 *pos = ies; 932 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len; 933 struct rrm_measurement_beacon_report rep; 934 u8 idx = 0; 935 936 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 && 937 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0) 938 return 0; 939 940 if (data->ssid_len && 941 (data->ssid_len != bss->ssid_len || 942 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0)) 943 return 0; 944 945 if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class, 946 &rep.channel, &rep.report_info) < 0) 947 return 0; 948 949 rep.start_time = host_to_le64(start); 950 rep.duration = host_to_le16(data->scan_params.duration); 951 rep.rcpi = rssi_to_rcpi(bss->level); 952 rep.rsni = 255; /* 255 indicates that RSNI is not available */ 953 os_memcpy(rep.bssid, bss->bssid, ETH_ALEN); 954 rep.antenna_id = 0; /* unknown */ 955 rep.parent_tsf = host_to_le32(parent_tsf); 956 957 do { 958 int ret; 959 960 ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep, 961 &pos, &ies_len, idx++); 962 if (ret) 963 return ret; 964 } while (data->report_detail != BEACON_REPORT_DETAIL_NONE && 965 ies_len >= 2); 966 967 return 0; 968 } 969 970 971 static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s, 972 struct wpabuf **buf) 973 { 974 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token, 975 MEASUREMENT_REPORT_MODE_ACCEPT, 976 MEASURE_TYPE_BEACON, NULL, 0); 977 } 978 979 980 static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s, 981 struct wpabuf **buf) 982 { 983 size_t i; 984 985 for (i = 0; i < wpa_s->last_scan_res_used; i++) { 986 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i], 987 0, 0) < 0) 988 break; 989 } 990 991 if (!(*buf)) 992 wpas_beacon_rep_no_results(wpa_s, buf); 993 994 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf); 995 } 996 997 998 void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s) 999 { 1000 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) { 1001 struct wpabuf *buf = NULL; 1002 1003 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token, 1004 MEASUREMENT_REPORT_MODE_REJECT_REFUSED, 1005 MEASURE_TYPE_BEACON, NULL, 0)) { 1006 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed"); 1007 wpabuf_free(buf); 1008 return; 1009 } 1010 1011 wpas_rrm_send_msr_report(wpa_s, buf); 1012 wpabuf_free(buf); 1013 } 1014 1015 wpas_clear_beacon_rep_data(wpa_s); 1016 } 1017 1018 1019 static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1020 { 1021 struct wpa_supplicant *wpa_s = eloop_ctx; 1022 struct wpa_driver_scan_params *params = 1023 &wpa_s->beacon_rep_data.scan_params; 1024 u16 prev_duration = params->duration; 1025 1026 if (!wpa_s->current_bss) 1027 return; 1028 1029 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) && 1030 params->duration) { 1031 wpa_printf(MSG_DEBUG, 1032 "RRM: Cannot set scan duration due to missing driver support"); 1033 params->duration = 0; 1034 } 1035 os_get_reltime(&wpa_s->beacon_rep_scan); 1036 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) || 1037 wpa_supplicant_trigger_scan(wpa_s, params)) 1038 wpas_rrm_refuse_request(wpa_s); 1039 params->duration = prev_duration; 1040 } 1041 1042 1043 static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s, 1044 struct beacon_rep_data *data, 1045 u8 sid, u8 slen, const u8 *subelem) 1046 { 1047 u8 report_info, i; 1048 1049 switch (sid) { 1050 case WLAN_BEACON_REQUEST_SUBELEM_SSID: 1051 if (!slen) { 1052 wpa_printf(MSG_DEBUG, 1053 "SSID subelement with zero length - wildcard SSID"); 1054 break; 1055 } 1056 1057 if (slen > SSID_MAX_LEN) { 1058 wpa_printf(MSG_DEBUG, 1059 "Invalid SSID subelement length: %u", slen); 1060 return -1; 1061 } 1062 1063 data->ssid_len = slen; 1064 os_memcpy(data->ssid, subelem, data->ssid_len); 1065 break; 1066 case WLAN_BEACON_REQUEST_SUBELEM_INFO: 1067 if (slen != 2) { 1068 wpa_printf(MSG_DEBUG, 1069 "Invalid reporting information subelement length: %u", 1070 slen); 1071 return -1; 1072 } 1073 1074 report_info = subelem[0]; 1075 if (report_info != 0) { 1076 wpa_printf(MSG_DEBUG, 1077 "reporting information=%u is not supported", 1078 report_info); 1079 return 0; 1080 } 1081 break; 1082 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL: 1083 if (slen != 1) { 1084 wpa_printf(MSG_DEBUG, 1085 "Invalid reporting detail subelement length: %u", 1086 slen); 1087 return -1; 1088 } 1089 1090 data->report_detail = subelem[0]; 1091 if (data->report_detail > 1092 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 1093 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u", 1094 subelem[0]); 1095 return -1; 1096 } 1097 1098 break; 1099 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST: 1100 if (data->report_detail != 1101 BEACON_REPORT_DETAIL_REQUESTED_ONLY) { 1102 wpa_printf(MSG_DEBUG, 1103 "Beacon request: request subelement is present but report detail is %u", 1104 data->report_detail); 1105 return -1; 1106 } 1107 1108 if (!slen) { 1109 wpa_printf(MSG_DEBUG, 1110 "Invalid request subelement length: %u", 1111 slen); 1112 return -1; 1113 } 1114 1115 if (data->eids) { 1116 wpa_printf(MSG_DEBUG, 1117 "Beacon Request: Request subelement appears more than once"); 1118 return -1; 1119 } 1120 1121 data->eids = bitfield_alloc(255); 1122 if (!data->eids) { 1123 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap"); 1124 return -1; 1125 } 1126 1127 for (i = 0; i < slen; i++) 1128 bitfield_set(data->eids, subelem[i]); 1129 break; 1130 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL: 1131 /* Skip - it will be processed when freqs are added */ 1132 break; 1133 case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION: 1134 if (slen != 1) { 1135 wpa_printf(MSG_DEBUG, 1136 "Beacon request: Invalid last indication request subelement length: %u", 1137 slen); 1138 return -1; 1139 } 1140 1141 data->last_indication = subelem[0]; 1142 break; 1143 default: 1144 wpa_printf(MSG_DEBUG, 1145 "Beacon request: Unknown subelement id %u", sid); 1146 break; 1147 } 1148 1149 return 1; 1150 } 1151 1152 1153 /** 1154 * Returns 0 if the next element can be processed, 1 if some operation was 1155 * triggered, and -1 if processing failed (i.e., the element is in invalid 1156 * format or an internal error occurred). 1157 */ 1158 static int 1159 wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s, 1160 u8 elem_token, int duration_mandatory, 1161 const struct rrm_measurement_beacon_request *req, 1162 size_t len, struct wpabuf **buf) 1163 { 1164 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1165 struct wpa_driver_scan_params *params = &data->scan_params; 1166 const u8 *subelems; 1167 size_t elems_len; 1168 u16 rand_interval; 1169 u32 interval_usec; 1170 u32 _rand; 1171 int ret = 0, res; 1172 u8 reject_mode; 1173 1174 if (len < sizeof(*req)) 1175 return -1; 1176 1177 if (req->mode != BEACON_REPORT_MODE_PASSIVE && 1178 req->mode != BEACON_REPORT_MODE_ACTIVE && 1179 req->mode != BEACON_REPORT_MODE_TABLE) 1180 return 0; 1181 1182 subelems = req->variable; 1183 elems_len = len - sizeof(*req); 1184 rand_interval = le_to_host16(req->rand_interval); 1185 1186 os_free(params->freqs); 1187 os_memset(params, 0, sizeof(*params)); 1188 1189 data->token = elem_token; 1190 1191 /* default reporting detail is all fixed length fields and all 1192 * elements */ 1193 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS; 1194 os_memcpy(data->bssid, req->bssid, ETH_ALEN); 1195 1196 while (elems_len >= 2) { 1197 if (subelems[1] > elems_len - 2) { 1198 wpa_printf(MSG_DEBUG, 1199 "Beacon Request: Truncated subelement"); 1200 ret = -1; 1201 goto out; 1202 } 1203 1204 res = wpas_rm_handle_beacon_req_subelem( 1205 wpa_s, data, subelems[0], subelems[1], &subelems[2]); 1206 if (res < 0) { 1207 ret = res; 1208 goto out; 1209 } else if (!res) { 1210 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE; 1211 goto out_reject; 1212 } 1213 1214 elems_len -= 2 + subelems[1]; 1215 subelems += 2 + subelems[1]; 1216 } 1217 1218 if (req->mode == BEACON_REPORT_MODE_TABLE) { 1219 wpas_beacon_rep_table(wpa_s, buf); 1220 goto out; 1221 } 1222 1223 params->freqs = wpas_beacon_request_freqs( 1224 wpa_s, req->oper_class, req->channel, 1225 req->mode == BEACON_REPORT_MODE_ACTIVE, 1226 req->variable, len - sizeof(*req)); 1227 if (!params->freqs) { 1228 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels"); 1229 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED; 1230 goto out_reject; 1231 } 1232 1233 params->duration = le_to_host16(req->duration); 1234 params->duration_mandatory = duration_mandatory; 1235 if (!params->duration) { 1236 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0"); 1237 ret = -1; 1238 goto out; 1239 } 1240 1241 params->only_new_results = 1; 1242 1243 if (req->mode == BEACON_REPORT_MODE_ACTIVE) { 1244 params->ssids[params->num_ssids].ssid = data->ssid; 1245 params->ssids[params->num_ssids++].ssid_len = data->ssid_len; 1246 } 1247 1248 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0) 1249 _rand = os_random(); 1250 interval_usec = (_rand % (rand_interval + 1)) * 1024; 1251 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s, 1252 NULL); 1253 return 1; 1254 out_reject: 1255 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1256 wpas_rrm_report_elem(buf, elem_token, reject_mode, 1257 MEASURE_TYPE_BEACON, NULL, 0) < 0) { 1258 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1259 ret = -1; 1260 } 1261 out: 1262 wpas_clear_beacon_rep_data(wpa_s); 1263 return ret; 1264 } 1265 1266 1267 static int 1268 wpas_rrm_handle_msr_req_element( 1269 struct wpa_supplicant *wpa_s, 1270 const struct rrm_measurement_request_element *req, 1271 struct wpabuf **buf) 1272 { 1273 int duration_mandatory; 1274 1275 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d", 1276 req->type, req->token); 1277 1278 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) { 1279 /* Enable bit is not supported for now */ 1280 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore"); 1281 return 0; 1282 } 1283 1284 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) && 1285 req->type > MEASURE_TYPE_RPI_HIST) { 1286 /* Parallel measurements are not supported for now */ 1287 wpa_printf(MSG_DEBUG, 1288 "RRM: Parallel measurements are not supported, reject"); 1289 goto reject; 1290 } 1291 1292 duration_mandatory = 1293 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY); 1294 1295 switch (req->type) { 1296 case MEASURE_TYPE_LCI: 1297 return wpas_rrm_build_lci_report(wpa_s, req, buf); 1298 case MEASURE_TYPE_BEACON: 1299 if (duration_mandatory && 1300 !(wpa_s->drv_rrm_flags & 1301 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) { 1302 wpa_printf(MSG_DEBUG, 1303 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration"); 1304 goto reject; 1305 } 1306 return wpas_rm_handle_beacon_req(wpa_s, req->token, 1307 duration_mandatory, 1308 (const void *) req->variable, 1309 req->len - 3, buf); 1310 default: 1311 wpa_printf(MSG_INFO, 1312 "RRM: Unsupported radio measurement type %u", 1313 req->type); 1314 break; 1315 } 1316 1317 reject: 1318 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1319 wpas_rrm_report_elem(buf, req->token, 1320 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE, 1321 req->type, NULL, 0) < 0) { 1322 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1323 return -1; 1324 } 1325 1326 return 0; 1327 } 1328 1329 1330 static struct wpabuf * 1331 wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos, 1332 size_t len) 1333 { 1334 struct wpabuf *buf = NULL; 1335 1336 while (len) { 1337 const struct rrm_measurement_request_element *req; 1338 int res; 1339 1340 if (len < 2) { 1341 wpa_printf(MSG_DEBUG, "RRM: Truncated element"); 1342 goto out; 1343 } 1344 1345 req = (const struct rrm_measurement_request_element *) pos; 1346 if (req->eid != WLAN_EID_MEASURE_REQUEST) { 1347 wpa_printf(MSG_DEBUG, 1348 "RRM: Expected Measurement Request element, but EID is %u", 1349 req->eid); 1350 goto out; 1351 } 1352 1353 if (req->len < 3) { 1354 wpa_printf(MSG_DEBUG, "RRM: Element length too short"); 1355 goto out; 1356 } 1357 1358 if (req->len > len - 2) { 1359 wpa_printf(MSG_DEBUG, "RRM: Element length too long"); 1360 goto out; 1361 } 1362 1363 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf); 1364 if (res < 0) 1365 goto out; 1366 1367 pos += req->len + 2; 1368 len -= req->len + 2; 1369 } 1370 1371 return buf; 1372 1373 out: 1374 wpabuf_free(buf); 1375 return NULL; 1376 } 1377 1378 1379 void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s, 1380 const u8 *src, const u8 *dst, 1381 const u8 *frame, size_t len) 1382 { 1383 struct wpabuf *report; 1384 1385 if (wpa_s->wpa_state != WPA_COMPLETED) { 1386 wpa_printf(MSG_INFO, 1387 "RRM: Ignoring radio measurement request: Not associated"); 1388 return; 1389 } 1390 1391 if (!wpa_s->rrm.rrm_used) { 1392 wpa_printf(MSG_INFO, 1393 "RRM: Ignoring radio measurement request: Not RRM network"); 1394 return; 1395 } 1396 1397 if (len < 3) { 1398 wpa_printf(MSG_INFO, 1399 "RRM: Ignoring too short radio measurement request"); 1400 return; 1401 } 1402 1403 wpa_s->rrm.token = *frame; 1404 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN); 1405 1406 /* Number of repetitions is not supported */ 1407 1408 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3); 1409 if (!report) 1410 return; 1411 1412 wpas_rrm_send_msr_report(wpa_s, report); 1413 wpabuf_free(report); 1414 } 1415 1416 1417 void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s, 1418 const u8 *src, 1419 const u8 *frame, size_t len, 1420 int rssi) 1421 { 1422 struct wpabuf *buf; 1423 const struct rrm_link_measurement_request *req; 1424 struct rrm_link_measurement_report report; 1425 1426 if (wpa_s->wpa_state != WPA_COMPLETED) { 1427 wpa_printf(MSG_INFO, 1428 "RRM: Ignoring link measurement request. Not associated"); 1429 return; 1430 } 1431 1432 if (!wpa_s->rrm.rrm_used) { 1433 wpa_printf(MSG_INFO, 1434 "RRM: Ignoring link measurement request. Not RRM network"); 1435 return; 1436 } 1437 1438 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) { 1439 wpa_printf(MSG_INFO, 1440 "RRM: Measurement report failed. TX power insertion not supported"); 1441 return; 1442 } 1443 1444 req = (const struct rrm_link_measurement_request *) frame; 1445 if (len < sizeof(*req)) { 1446 wpa_printf(MSG_INFO, 1447 "RRM: Link measurement report failed. Request too short"); 1448 return; 1449 } 1450 1451 os_memset(&report, 0, sizeof(report)); 1452 report.dialog_token = req->dialog_token; 1453 report.tpc.eid = WLAN_EID_TPC_REPORT; 1454 report.tpc.len = 2; 1455 /* Note: The driver is expected to update report.tpc.tx_power and 1456 * report.tpc.link_margin subfields when sending out this frame. 1457 * Similarly, the driver would need to update report.rx_ant_id and 1458 * report.tx_ant_id subfields. */ 1459 report.rsni = 255; /* 255 indicates that RSNI is not available */ 1460 report.rcpi = rssi_to_rcpi(rssi); 1461 1462 /* action_category + action_code */ 1463 buf = wpabuf_alloc(2 + sizeof(report)); 1464 if (buf == NULL) { 1465 wpa_printf(MSG_ERROR, 1466 "RRM: Link measurement report failed. Buffer allocation failed"); 1467 return; 1468 } 1469 1470 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT); 1471 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT); 1472 wpabuf_put_data(buf, &report, sizeof(report)); 1473 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf); 1474 1475 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src, 1476 wpa_s->own_addr, wpa_s->bssid, 1477 wpabuf_head(buf), wpabuf_len(buf), 0)) { 1478 wpa_printf(MSG_ERROR, 1479 "RRM: Link measurement report failed. Send action failed"); 1480 } 1481 wpabuf_free(buf); 1482 } 1483 1484 1485 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s, 1486 struct wpa_scan_results *scan_res, 1487 struct scan_info *info) 1488 { 1489 size_t i = 0; 1490 struct wpabuf *buf = NULL; 1491 1492 if (!wpa_s->beacon_rep_data.token) 1493 return 0; 1494 1495 if (!wpa_s->current_bss) 1496 goto out; 1497 1498 /* If the measurement was aborted, don't report partial results */ 1499 if (info->aborted) 1500 goto out; 1501 1502 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR, 1503 MAC2STR(info->scan_start_tsf_bssid), 1504 MAC2STR(wpa_s->current_bss->bssid)); 1505 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1506 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid, 1507 ETH_ALEN) != 0) { 1508 wpa_printf(MSG_DEBUG, 1509 "RRM: Ignore scan results due to mismatching TSF BSSID"); 1510 goto out; 1511 } 1512 1513 for (i = 0; i < scan_res->num; i++) { 1514 struct wpa_bss *bss = 1515 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid); 1516 1517 if (!bss) 1518 continue; 1519 1520 if ((wpa_s->drv_rrm_flags & 1521 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1522 os_memcmp(scan_res->res[i]->tsf_bssid, 1523 wpa_s->current_bss->bssid, ETH_ALEN) != 0) { 1524 wpa_printf(MSG_DEBUG, 1525 "RRM: Ignore scan result for " MACSTR 1526 " due to mismatching TSF BSSID" MACSTR, 1527 MAC2STR(scan_res->res[i]->bssid), 1528 MAC2STR(scan_res->res[i]->tsf_bssid)); 1529 continue; 1530 } 1531 1532 /* 1533 * Don't report results that were not received during the 1534 * current measurement. 1535 */ 1536 if (!(wpa_s->drv_rrm_flags & 1537 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) { 1538 struct os_reltime update_time, diff; 1539 1540 /* For now, allow 8 ms older results due to some 1541 * unknown issue with cfg80211 BSS table updates during 1542 * a scan with the current BSS. 1543 * TODO: Fix this more properly to avoid having to have 1544 * this type of hacks in place. */ 1545 calculate_update_time(&scan_res->fetch_time, 1546 scan_res->res[i]->age, 1547 &update_time); 1548 os_reltime_sub(&wpa_s->beacon_rep_scan, 1549 &update_time, &diff); 1550 if (os_reltime_before(&update_time, 1551 &wpa_s->beacon_rep_scan) && 1552 (diff.sec || diff.usec >= 8000)) { 1553 wpa_printf(MSG_DEBUG, 1554 "RRM: Ignore scan result for " MACSTR 1555 " due to old update (age(ms) %u, calculated age %u.%06u seconds)", 1556 MAC2STR(scan_res->res[i]->bssid), 1557 scan_res->res[i]->age, 1558 (unsigned int) diff.sec, 1559 (unsigned int) diff.usec); 1560 continue; 1561 } 1562 } else if (info->scan_start_tsf > 1563 scan_res->res[i]->parent_tsf) { 1564 continue; 1565 } 1566 1567 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf, 1568 scan_res->res[i]->parent_tsf) < 0) 1569 break; 1570 } 1571 1572 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf)) 1573 goto out; 1574 1575 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf); 1576 1577 wpas_rrm_send_msr_report(wpa_s, buf); 1578 wpabuf_free(buf); 1579 1580 out: 1581 wpas_clear_beacon_rep_data(wpa_s); 1582 return 1; 1583 } 1584 1585 1586 void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s) 1587 { 1588 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1589 1590 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL); 1591 bitfield_free(data->eids); 1592 os_free(data->scan_params.freqs); 1593 os_memset(data, 0, sizeof(*data)); 1594 } 1595