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