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 21static 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 */ 43void 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 */ 62void 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 */ 134int 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 281static 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 300static int 301wpas_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 357reject: 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 370static 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 395static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s, 396 struct wpabuf *buf) 397{ 398 int len = wpabuf_len(buf); 399 const u8 *pos = wpabuf_head_u8(buf), *next = pos; 400 401#define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3) 402 403 while (len) { 404 int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len; 405 406 if (send_len == len || 407 (send_len + next[1] + 2) > MPDU_REPORT_LEN) { 408 wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len); 409 len -= send_len; 410 pos = next; 411 } 412 413 if (len) 414 next += next[1] + 2; 415 } 416#undef MPDU_REPORT_LEN 417} 418 419 420static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels, 421 int *freqs) 422{ 423 size_t i; 424 425 for (i = 0; i < num_primary_channels; i++) { 426 u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4; 427 428 freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan); 429 /* ieee80211_chan_to_freq() is not really meant for this 430 * conversion of 20 MHz primary channel numbers for wider VHT 431 * channels, so handle those as special cases here for now. */ 432 if (freqs[i] < 0 && 433 (op_class == 128 || op_class == 129 || op_class == 130)) 434 freqs[i] = 5000 + 5 * primary_chan; 435 if (freqs[i] < 0) { 436 wpa_printf(MSG_DEBUG, 437 "Beacon Report: Invalid channel %u", 438 chan); 439 return -1; 440 } 441 } 442 443 return 0; 444} 445 446 447static int * wpas_add_channels(const struct oper_class_map *op, 448 struct hostapd_hw_modes *mode, int active, 449 const u8 *channels, const u8 size) 450{ 451 int *freqs, *next_freq; 452 u8 num_primary_channels, i; 453 u8 num_chans; 454 455 num_chans = channels ? size : 456 (op->max_chan - op->min_chan) / op->inc + 1; 457 458 if (op->bw == BW80 || op->bw == BW80P80) 459 num_primary_channels = 4; 460 else if (op->bw == BW160) 461 num_primary_channels = 8; 462 else 463 num_primary_channels = 1; 464 465 /* one extra place for the zero-terminator */ 466 freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs)); 467 if (!freqs) { 468 wpa_printf(MSG_ERROR, 469 "Beacon Report: Failed to allocate freqs array"); 470 return NULL; 471 } 472 473 next_freq = freqs; 474 for (i = 0; i < num_chans; i++) { 475 u8 chan = channels ? channels[i] : op->min_chan + i * op->inc; 476 enum chan_allowed res = verify_channel(mode, chan, op->bw); 477 478 if (res == NOT_ALLOWED || (res == NO_IR && active)) 479 continue; 480 481 if (wpas_add_channel(op->op_class, chan, num_primary_channels, 482 next_freq) < 0) { 483 os_free(freqs); 484 return NULL; 485 } 486 487 next_freq += num_primary_channels; 488 } 489 490 if (!freqs[0]) { 491 os_free(freqs); 492 return NULL; 493 } 494 495 return freqs; 496} 497 498 499static int * wpas_op_class_freqs(const struct oper_class_map *op, 500 struct hostapd_hw_modes *mode, int active) 501{ 502 u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 }; 503 u8 channels_160mhz[] = { 50, 114 }; 504 505 /* 506 * When adding all channels in the operating class, 80 + 80 MHz 507 * operating classes are like 80 MHz channels because we add all valid 508 * channels anyway. 509 */ 510 if (op->bw == BW80 || op->bw == BW80P80) 511 return wpas_add_channels(op, mode, active, channels_80mhz, 512 ARRAY_SIZE(channels_80mhz)); 513 514 if (op->bw == BW160) 515 return wpas_add_channels(op, mode, active, channels_160mhz, 516 ARRAY_SIZE(channels_160mhz)); 517 518 return wpas_add_channels(op, mode, active, NULL, 0); 519} 520 521 522static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active, 523 const char *country, const u8 *subelems, 524 size_t len) 525{ 526 int *freqs = NULL, *new_freqs; 527 const u8 *end = subelems + len; 528 529 while (end - subelems > 2) { 530 const struct oper_class_map *op; 531 const u8 *ap_chan_elem, *pos; 532 u8 left; 533 struct hostapd_hw_modes *mode; 534 535 ap_chan_elem = get_ie(subelems, end - subelems, 536 WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL); 537 if (!ap_chan_elem) 538 break; 539 pos = ap_chan_elem + 2; 540 left = ap_chan_elem[1]; 541 if (left < 1) 542 break; 543 subelems = ap_chan_elem + 2 + left; 544 545 op = get_oper_class(country, *pos); 546 if (!op) { 547 wpa_printf(MSG_DEBUG, 548 "Beacon request: unknown operating class in AP Channel Report subelement %u", 549 *pos); 550 goto out; 551 } 552 pos++; 553 left--; 554 555 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode); 556 if (!mode) 557 continue; 558 559 /* 560 * For 80 + 80 MHz operating classes, this AP Channel Report 561 * element should be followed by another element specifying 562 * the second 80 MHz channel. For now just add this 80 MHz 563 * channel, the second 80 MHz channel will be added when the 564 * next element is parsed. 565 * TODO: Verify that this AP Channel Report element is followed 566 * by a corresponding AP Channel Report element as specified in 567 * IEEE Std 802.11-2016, 11.11.9.1. 568 */ 569 new_freqs = wpas_add_channels(op, mode, active, pos, left); 570 if (new_freqs) 571 int_array_concat(&freqs, new_freqs); 572 573 os_free(new_freqs); 574 } 575 576 return freqs; 577out: 578 os_free(freqs); 579 return NULL; 580} 581 582 583static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s, 584 u8 op_class, u8 chan, int active, 585 const u8 *subelems, size_t len) 586{ 587 int *freqs = NULL, *ext_freqs = NULL; 588 struct hostapd_hw_modes *mode; 589 const char *country = NULL; 590 const struct oper_class_map *op; 591 const u8 *elem; 592 593 if (!wpa_s->current_bss) 594 return NULL; 595 elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); 596 if (elem && elem[1] >= 2) 597 country = (const char *) (elem + 2); 598 599 op = get_oper_class(country, op_class); 600 if (!op) { 601 wpa_printf(MSG_DEBUG, 602 "Beacon request: invalid operating class %d", 603 op_class); 604 return NULL; 605 } 606 607 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode); 608 if (!mode) 609 return NULL; 610 611 switch (chan) { 612 case 0: 613 freqs = wpas_op_class_freqs(op, mode, active); 614 if (!freqs) 615 return NULL; 616 break; 617 case 255: 618 /* freqs will be added from AP channel subelements */ 619 break; 620 default: 621 freqs = wpas_add_channels(op, mode, active, &chan, 1); 622 if (!freqs) 623 return NULL; 624 break; 625 } 626 627 ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems, 628 len); 629 if (ext_freqs) { 630 int_array_concat(&freqs, ext_freqs); 631 os_free(ext_freqs); 632 int_array_sort_unique(freqs); 633 } 634 635 return freqs; 636} 637 638 639static int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len, 640 u8 *op_class, u8 *chan, u8 *phy_type) 641{ 642 const u8 *ie; 643 int sec_chan = 0, vht = 0; 644 struct ieee80211_ht_operation *ht_oper = NULL; 645 struct ieee80211_vht_operation *vht_oper = NULL; 646 u8 seg0, seg1; 647 648 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION); 649 if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) { 650 u8 sec_chan_offset; 651 652 ht_oper = (struct ieee80211_ht_operation *) (ie + 2); 653 sec_chan_offset = ht_oper->ht_param & 654 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 655 if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 656 sec_chan = 1; 657 else if (sec_chan_offset == 658 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 659 sec_chan = -1; 660 } 661 662 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION); 663 if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) { 664 vht_oper = (struct ieee80211_vht_operation *) (ie + 2); 665 666 switch (vht_oper->vht_op_info_chwidth) { 667 case 1: 668 seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx; 669 seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx; 670 if (seg1 && abs(seg1 - seg0) == 8) 671 vht = VHT_CHANWIDTH_160MHZ; 672 else if (seg1) 673 vht = VHT_CHANWIDTH_80P80MHZ; 674 else 675 vht = VHT_CHANWIDTH_80MHZ; 676 break; 677 case 2: 678 vht = VHT_CHANWIDTH_160MHZ; 679 break; 680 case 3: 681 vht = VHT_CHANWIDTH_80P80MHZ; 682 break; 683 default: 684 vht = VHT_CHANWIDTH_USE_HT; 685 break; 686 } 687 } 688 689 if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class, 690 chan) == NUM_HOSTAPD_MODES) { 691 wpa_printf(MSG_DEBUG, 692 "Cannot determine operating class and channel"); 693 return -1; 694 } 695 696 *phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL, 697 vht_oper != NULL); 698 if (*phy_type == PHY_TYPE_UNSPECIFIED) { 699 wpa_printf(MSG_DEBUG, "Cannot determine phy type"); 700 return -1; 701 } 702 703 return 0; 704} 705 706 707static int wpas_beacon_rep_add_frame_body(struct bitfield *eids, 708 enum beacon_report_detail detail, 709 struct wpa_bss *bss, u8 *buf, 710 size_t buf_len) 711{ 712 u8 *ies = (u8 *) (bss + 1); 713 size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len; 714 u8 *pos = buf; 715 int rem_len; 716 717 rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) - 718 sizeof(struct rrm_measurement_report_element) - 2; 719 720 if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 721 wpa_printf(MSG_DEBUG, 722 "Beacon Request: Invalid reporting detail: %d", 723 detail); 724 return -1; 725 } 726 727 if (detail == BEACON_REPORT_DETAIL_NONE) 728 return 0; 729 730 /* 731 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) + 732 * beacon interval(2) + capabilities(2) = 14 bytes 733 */ 734 if (buf_len < 14) 735 return 0; 736 737 *pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY; 738 /* The length will be filled later */ 739 pos++; 740 WPA_PUT_LE64(pos, bss->tsf); 741 pos += sizeof(bss->tsf); 742 WPA_PUT_LE16(pos, bss->beacon_int); 743 pos += 2; 744 WPA_PUT_LE16(pos, bss->caps); 745 pos += 2; 746 747 rem_len -= pos - buf; 748 749 /* 750 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame 751 * body subelement causes the element to exceed the maximum element 752 * size, the subelement is truncated so that the last IE is a complete 753 * IE. So even when required to report all IEs, add elements one after 754 * the other and stop once there is no more room in the measurement 755 * element. 756 */ 757 while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) { 758 if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS || 759 (eids && bitfield_is_set(eids, ies[0]))) { 760 u8 eid = ies[0], elen = ies[1]; 761 762 if ((eid == WLAN_EID_TIM || eid == WLAN_EID_RSN) && 763 elen > 4) 764 elen = 4; 765 /* 766 * TODO: Truncate IBSS DFS element as described in 767 * IEEE Std 802.11-2016, 9.4.2.22.7. 768 */ 769 770 if (2 + elen > buf + buf_len - pos || 771 2 + elen > rem_len) 772 break; 773 774 *pos++ = ies[0]; 775 *pos++ = elen; 776 os_memcpy(pos, ies + 2, elen); 777 pos += elen; 778 rem_len -= 2 + elen; 779 } 780 781 ies_len -= 2 + ies[1]; 782 ies += 2 + ies[1]; 783 } 784 785 /* Now the length is known */ 786 buf[1] = pos - buf - 2; 787 return pos - buf; 788} 789 790 791static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s, 792 struct wpabuf **wpa_buf, struct wpa_bss *bss, 793 u64 start, u64 parent_tsf) 794{ 795 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 796 u8 *ie = (u8 *) (bss + 1); 797 size_t ie_len = bss->ie_len + bss->beacon_ie_len; 798 int ret; 799 u8 *buf; 800 struct rrm_measurement_beacon_report *rep; 801 802 if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 && 803 os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0) 804 return 0; 805 806 if (data->ssid_len && 807 (data->ssid_len != bss->ssid_len || 808 os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0)) 809 return 0; 810 811 /* Maximum element length: beacon report element + reported frame body 812 * subelement + all IEs of the reported beacon */ 813 buf = os_malloc(sizeof(*rep) + 14 + ie_len); 814 if (!buf) 815 return -1; 816 817 rep = (struct rrm_measurement_beacon_report *) buf; 818 if (wpas_get_op_chan_phy(bss->freq, ie, ie_len, &rep->op_class, 819 &rep->channel, &rep->report_info) < 0) { 820 ret = 0; 821 goto out; 822 } 823 824 rep->start_time = host_to_le64(start); 825 rep->duration = host_to_le16(data->scan_params.duration); 826 rep->rcpi = rssi_to_rcpi(bss->level); 827 rep->rsni = 255; /* 255 indicates that RSNI is not available */ 828 os_memcpy(rep->bssid, bss->bssid, ETH_ALEN); 829 rep->antenna_id = 0; /* unknown */ 830 rep->parent_tsf = host_to_le32(parent_tsf); 831 832 ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail, 833 bss, rep->variable, 14 + ie_len); 834 if (ret < 0) 835 goto out; 836 837 ret = wpas_rrm_report_elem(wpa_buf, wpa_s->beacon_rep_data.token, 838 MEASUREMENT_REPORT_MODE_ACCEPT, 839 MEASURE_TYPE_BEACON, buf, 840 ret + sizeof(*rep)); 841out: 842 os_free(buf); 843 return ret; 844} 845 846 847static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s, 848 struct wpabuf **buf) 849{ 850 return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token, 851 MEASUREMENT_REPORT_MODE_ACCEPT, 852 MEASURE_TYPE_BEACON, NULL, 0); 853} 854 855 856static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s, 857 struct wpabuf **buf) 858{ 859 size_t i; 860 861 for (i = 0; i < wpa_s->last_scan_res_used; i++) { 862 if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i], 863 0, 0) < 0) 864 break; 865 } 866 867 if (!(*buf)) 868 wpas_beacon_rep_no_results(wpa_s, buf); 869 870 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf); 871} 872 873 874void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s) 875{ 876 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) { 877 struct wpabuf *buf = NULL; 878 879 if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token, 880 MEASUREMENT_REPORT_MODE_REJECT_REFUSED, 881 MEASURE_TYPE_BEACON, NULL, 0)) { 882 wpa_printf(MSG_ERROR, "RRM: Memory allocation failed"); 883 wpabuf_free(buf); 884 return; 885 } 886 887 wpas_rrm_send_msr_report(wpa_s, buf); 888 wpabuf_free(buf); 889 } 890 891 wpas_clear_beacon_rep_data(wpa_s); 892} 893 894 895static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx) 896{ 897 struct wpa_supplicant *wpa_s = eloop_ctx; 898 struct wpa_driver_scan_params *params = 899 &wpa_s->beacon_rep_data.scan_params; 900 u16 prev_duration = params->duration; 901 902 if (!wpa_s->current_bss) 903 return; 904 905 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) && 906 params->duration) { 907 wpa_printf(MSG_DEBUG, 908 "RRM: Cannot set scan duration due to missing driver support"); 909 params->duration = 0; 910 } 911 os_get_reltime(&wpa_s->beacon_rep_scan); 912 if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) || 913 wpa_supplicant_trigger_scan(wpa_s, params)) 914 wpas_rrm_refuse_request(wpa_s); 915 params->duration = prev_duration; 916} 917 918 919static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s, 920 struct beacon_rep_data *data, 921 u8 sid, u8 slen, const u8 *subelem) 922{ 923 u8 report_info, i; 924 925 switch (sid) { 926 case WLAN_BEACON_REQUEST_SUBELEM_SSID: 927 if (!slen) { 928 wpa_printf(MSG_DEBUG, 929 "SSID subelement with zero length - wildcard SSID"); 930 break; 931 } 932 933 if (slen > SSID_MAX_LEN) { 934 wpa_printf(MSG_DEBUG, 935 "Invalid SSID subelement length: %u", slen); 936 return -1; 937 } 938 939 data->ssid_len = slen; 940 os_memcpy(data->ssid, subelem, data->ssid_len); 941 break; 942 case WLAN_BEACON_REQUEST_SUBELEM_INFO: 943 if (slen != 2) { 944 wpa_printf(MSG_DEBUG, 945 "Invalid reporting information subelement length: %u", 946 slen); 947 return -1; 948 } 949 950 report_info = subelem[0]; 951 if (report_info != 0) { 952 wpa_printf(MSG_DEBUG, 953 "reporting information=%u is not supported", 954 report_info); 955 return 0; 956 } 957 break; 958 case WLAN_BEACON_REQUEST_SUBELEM_DETAIL: 959 if (slen != 1) { 960 wpa_printf(MSG_DEBUG, 961 "Invalid reporting detail subelement length: %u", 962 slen); 963 return -1; 964 } 965 966 data->report_detail = subelem[0]; 967 if (data->report_detail > 968 BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) { 969 wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u", 970 subelem[0]); 971 return -1; 972 } 973 974 break; 975 case WLAN_BEACON_REQUEST_SUBELEM_REQUEST: 976 if (data->report_detail != 977 BEACON_REPORT_DETAIL_REQUESTED_ONLY) { 978 wpa_printf(MSG_DEBUG, 979 "Beacon request: request subelement is present but report detail is %u", 980 data->report_detail); 981 return -1; 982 } 983 984 if (!slen) { 985 wpa_printf(MSG_DEBUG, 986 "Invalid request subelement length: %u", 987 slen); 988 return -1; 989 } 990 991 if (data->eids) { 992 wpa_printf(MSG_DEBUG, 993 "Beacon Request: Request subelement appears more than once"); 994 return -1; 995 } 996 997 data->eids = bitfield_alloc(255); 998 if (!data->eids) { 999 wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap"); 1000 return -1; 1001 } 1002 1003 for (i = 0; i < slen; i++) 1004 bitfield_set(data->eids, subelem[i]); 1005 break; 1006 case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL: 1007 /* Skip - it will be processed when freqs are added */ 1008 break; 1009 default: 1010 wpa_printf(MSG_DEBUG, 1011 "Beacon request: Unknown subelement id %u", sid); 1012 break; 1013 } 1014 1015 return 1; 1016} 1017 1018 1019/** 1020 * Returns 0 if the next element can be processed, 1 if some operation was 1021 * triggered, and -1 if processing failed (i.e., the element is in invalid 1022 * format or an internal error occurred). 1023 */ 1024static int 1025wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s, 1026 u8 elem_token, int duration_mandatory, 1027 const struct rrm_measurement_beacon_request *req, 1028 size_t len, struct wpabuf **buf) 1029{ 1030 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1031 struct wpa_driver_scan_params *params = &data->scan_params; 1032 const u8 *subelems; 1033 size_t elems_len; 1034 u16 rand_interval; 1035 u32 interval_usec; 1036 u32 _rand; 1037 int ret = 0, res; 1038 u8 reject_mode; 1039 1040 if (len < sizeof(*req)) 1041 return -1; 1042 1043 if (req->mode != BEACON_REPORT_MODE_PASSIVE && 1044 req->mode != BEACON_REPORT_MODE_ACTIVE && 1045 req->mode != BEACON_REPORT_MODE_TABLE) 1046 return 0; 1047 1048 subelems = req->variable; 1049 elems_len = len - sizeof(*req); 1050 rand_interval = le_to_host16(req->rand_interval); 1051 1052 os_free(params->freqs); 1053 os_memset(params, 0, sizeof(*params)); 1054 1055 data->token = elem_token; 1056 1057 /* default reporting detail is all fixed length fields and all 1058 * elements */ 1059 data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS; 1060 os_memcpy(data->bssid, req->bssid, ETH_ALEN); 1061 1062 while (elems_len >= 2) { 1063 if (subelems[1] > elems_len - 2) { 1064 wpa_printf(MSG_DEBUG, 1065 "Beacon Request: Truncated subelement"); 1066 ret = -1; 1067 goto out; 1068 } 1069 1070 res = wpas_rm_handle_beacon_req_subelem( 1071 wpa_s, data, subelems[0], subelems[1], &subelems[2]); 1072 if (res < 0) { 1073 ret = res; 1074 goto out; 1075 } else if (!res) { 1076 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE; 1077 goto out_reject; 1078 } 1079 1080 elems_len -= 2 + subelems[1]; 1081 subelems += 2 + subelems[1]; 1082 } 1083 1084 if (req->mode == BEACON_REPORT_MODE_TABLE) { 1085 wpas_beacon_rep_table(wpa_s, buf); 1086 goto out; 1087 } 1088 1089 params->freqs = wpas_beacon_request_freqs( 1090 wpa_s, req->oper_class, req->channel, 1091 req->mode == BEACON_REPORT_MODE_ACTIVE, 1092 req->variable, len - sizeof(*req)); 1093 if (!params->freqs) { 1094 wpa_printf(MSG_DEBUG, "Beacon request: No valid channels"); 1095 reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED; 1096 goto out_reject; 1097 } 1098 1099 params->duration = le_to_host16(req->duration); 1100 params->duration_mandatory = duration_mandatory; 1101 if (!params->duration) { 1102 wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0"); 1103 ret = -1; 1104 goto out; 1105 } 1106 1107 params->only_new_results = 1; 1108 1109 if (req->mode == BEACON_REPORT_MODE_ACTIVE) { 1110 params->ssids[params->num_ssids].ssid = data->ssid; 1111 params->ssids[params->num_ssids++].ssid_len = data->ssid_len; 1112 } 1113 1114 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0) 1115 _rand = os_random(); 1116 interval_usec = (_rand % (rand_interval + 1)) * 1024; 1117 eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s, 1118 NULL); 1119 return 1; 1120out_reject: 1121 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1122 wpas_rrm_report_elem(buf, elem_token, reject_mode, 1123 MEASURE_TYPE_BEACON, NULL, 0) < 0) { 1124 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1125 ret = -1; 1126 } 1127out: 1128 wpas_clear_beacon_rep_data(wpa_s); 1129 return ret; 1130} 1131 1132 1133static int 1134wpas_rrm_handle_msr_req_element( 1135 struct wpa_supplicant *wpa_s, 1136 const struct rrm_measurement_request_element *req, 1137 struct wpabuf **buf) 1138{ 1139 int duration_mandatory; 1140 1141 wpa_printf(MSG_DEBUG, "Measurement request type %d token %d", 1142 req->type, req->token); 1143 1144 if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) { 1145 /* Enable bit is not supported for now */ 1146 wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore"); 1147 return 0; 1148 } 1149 1150 if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) && 1151 req->type > MEASURE_TYPE_RPI_HIST) { 1152 /* Parallel measurements are not supported for now */ 1153 wpa_printf(MSG_DEBUG, 1154 "RRM: Parallel measurements are not supported, reject"); 1155 goto reject; 1156 } 1157 1158 duration_mandatory = 1159 !!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY); 1160 1161 switch (req->type) { 1162 case MEASURE_TYPE_LCI: 1163 return wpas_rrm_build_lci_report(wpa_s, req, buf); 1164 case MEASURE_TYPE_BEACON: 1165 if (duration_mandatory && 1166 !(wpa_s->drv_rrm_flags & 1167 WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) { 1168 wpa_printf(MSG_DEBUG, 1169 "RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration"); 1170 goto reject; 1171 } 1172 return wpas_rm_handle_beacon_req(wpa_s, req->token, 1173 duration_mandatory, 1174 (const void *) req->variable, 1175 req->len - 3, buf); 1176 default: 1177 wpa_printf(MSG_INFO, 1178 "RRM: Unsupported radio measurement type %u", 1179 req->type); 1180 break; 1181 } 1182 1183reject: 1184 if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) && 1185 wpas_rrm_report_elem(buf, req->token, 1186 MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE, 1187 req->type, NULL, 0) < 0) { 1188 wpa_printf(MSG_DEBUG, "RRM: Failed to add report element"); 1189 return -1; 1190 } 1191 1192 return 0; 1193} 1194 1195 1196static struct wpabuf * 1197wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos, 1198 size_t len) 1199{ 1200 struct wpabuf *buf = NULL; 1201 1202 while (len) { 1203 const struct rrm_measurement_request_element *req; 1204 int res; 1205 1206 if (len < 2) { 1207 wpa_printf(MSG_DEBUG, "RRM: Truncated element"); 1208 goto out; 1209 } 1210 1211 req = (const struct rrm_measurement_request_element *) pos; 1212 if (req->eid != WLAN_EID_MEASURE_REQUEST) { 1213 wpa_printf(MSG_DEBUG, 1214 "RRM: Expected Measurement Request element, but EID is %u", 1215 req->eid); 1216 goto out; 1217 } 1218 1219 if (req->len < 3) { 1220 wpa_printf(MSG_DEBUG, "RRM: Element length too short"); 1221 goto out; 1222 } 1223 1224 if (req->len > len - 2) { 1225 wpa_printf(MSG_DEBUG, "RRM: Element length too long"); 1226 goto out; 1227 } 1228 1229 res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf); 1230 if (res < 0) 1231 goto out; 1232 1233 pos += req->len + 2; 1234 len -= req->len + 2; 1235 } 1236 1237 return buf; 1238 1239out: 1240 wpabuf_free(buf); 1241 return NULL; 1242} 1243 1244 1245void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s, 1246 const u8 *src, const u8 *dst, 1247 const u8 *frame, size_t len) 1248{ 1249 struct wpabuf *report; 1250 1251 if (wpa_s->wpa_state != WPA_COMPLETED) { 1252 wpa_printf(MSG_INFO, 1253 "RRM: Ignoring radio measurement request: Not associated"); 1254 return; 1255 } 1256 1257 if (!wpa_s->rrm.rrm_used) { 1258 wpa_printf(MSG_INFO, 1259 "RRM: Ignoring radio measurement request: Not RRM network"); 1260 return; 1261 } 1262 1263 if (len < 3) { 1264 wpa_printf(MSG_INFO, 1265 "RRM: Ignoring too short radio measurement request"); 1266 return; 1267 } 1268 1269 wpa_s->rrm.token = *frame; 1270 os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN); 1271 1272 /* Number of repetitions is not supported */ 1273 1274 report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3); 1275 if (!report) 1276 return; 1277 1278 wpas_rrm_send_msr_report(wpa_s, report); 1279 wpabuf_free(report); 1280} 1281 1282 1283void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s, 1284 const u8 *src, 1285 const u8 *frame, size_t len, 1286 int rssi) 1287{ 1288 struct wpabuf *buf; 1289 const struct rrm_link_measurement_request *req; 1290 struct rrm_link_measurement_report report; 1291 1292 if (wpa_s->wpa_state != WPA_COMPLETED) { 1293 wpa_printf(MSG_INFO, 1294 "RRM: Ignoring link measurement request. Not associated"); 1295 return; 1296 } 1297 1298 if (!wpa_s->rrm.rrm_used) { 1299 wpa_printf(MSG_INFO, 1300 "RRM: Ignoring link measurement request. Not RRM network"); 1301 return; 1302 } 1303 1304 if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) { 1305 wpa_printf(MSG_INFO, 1306 "RRM: Measurement report failed. TX power insertion not supported"); 1307 return; 1308 } 1309 1310 req = (const struct rrm_link_measurement_request *) frame; 1311 if (len < sizeof(*req)) { 1312 wpa_printf(MSG_INFO, 1313 "RRM: Link measurement report failed. Request too short"); 1314 return; 1315 } 1316 1317 os_memset(&report, 0, sizeof(report)); 1318 report.dialog_token = req->dialog_token; 1319 report.tpc.eid = WLAN_EID_TPC_REPORT; 1320 report.tpc.len = 2; 1321 /* Note: The driver is expected to update report.tpc.tx_power and 1322 * report.tpc.link_margin subfields when sending out this frame. 1323 * Similarly, the driver would need to update report.rx_ant_id and 1324 * report.tx_ant_id subfields. */ 1325 report.rsni = 255; /* 255 indicates that RSNI is not available */ 1326 report.rcpi = rssi_to_rcpi(rssi); 1327 1328 /* action_category + action_code */ 1329 buf = wpabuf_alloc(2 + sizeof(report)); 1330 if (buf == NULL) { 1331 wpa_printf(MSG_ERROR, 1332 "RRM: Link measurement report failed. Buffer allocation failed"); 1333 return; 1334 } 1335 1336 wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT); 1337 wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT); 1338 wpabuf_put_data(buf, &report, sizeof(report)); 1339 wpa_hexdump_buf(MSG_DEBUG, "RRM: Link measurement report", buf); 1340 1341 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src, 1342 wpa_s->own_addr, wpa_s->bssid, 1343 wpabuf_head(buf), wpabuf_len(buf), 0)) { 1344 wpa_printf(MSG_ERROR, 1345 "RRM: Link measurement report failed. Send action failed"); 1346 } 1347 wpabuf_free(buf); 1348} 1349 1350 1351int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s, 1352 struct wpa_scan_results *scan_res, 1353 struct scan_info *info) 1354{ 1355 size_t i = 0; 1356 struct wpabuf *buf = NULL; 1357 1358 if (!wpa_s->beacon_rep_data.token) 1359 return 0; 1360 1361 if (!wpa_s->current_bss) 1362 goto out; 1363 1364 /* If the measurement was aborted, don't report partial results */ 1365 if (info->aborted) 1366 goto out; 1367 1368 wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR, 1369 MAC2STR(info->scan_start_tsf_bssid), 1370 MAC2STR(wpa_s->current_bss->bssid)); 1371 if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1372 os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid, 1373 ETH_ALEN) != 0) { 1374 wpa_printf(MSG_DEBUG, 1375 "RRM: Ignore scan results due to mismatching TSF BSSID"); 1376 goto out; 1377 } 1378 1379 for (i = 0; i < scan_res->num; i++) { 1380 struct wpa_bss *bss = 1381 wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid); 1382 1383 if (!bss) 1384 continue; 1385 1386 if ((wpa_s->drv_rrm_flags & 1387 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) && 1388 os_memcmp(scan_res->res[i]->tsf_bssid, 1389 wpa_s->current_bss->bssid, ETH_ALEN) != 0) { 1390 wpa_printf(MSG_DEBUG, 1391 "RRM: Ignore scan result for " MACSTR 1392 " due to mismatching TSF BSSID" MACSTR, 1393 MAC2STR(scan_res->res[i]->bssid), 1394 MAC2STR(scan_res->res[i]->tsf_bssid)); 1395 continue; 1396 } 1397 1398 /* 1399 * Don't report results that were not received during the 1400 * current measurement. 1401 */ 1402 if (!(wpa_s->drv_rrm_flags & 1403 WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) { 1404 struct os_reltime update_time, diff; 1405 1406 /* For now, allow 8 ms older results due to some 1407 * unknown issue with cfg80211 BSS table updates during 1408 * a scan with the current BSS. 1409 * TODO: Fix this more properly to avoid having to have 1410 * this type of hacks in place. */ 1411 calculate_update_time(&scan_res->fetch_time, 1412 scan_res->res[i]->age, 1413 &update_time); 1414 os_reltime_sub(&wpa_s->beacon_rep_scan, 1415 &update_time, &diff); 1416 if (os_reltime_before(&update_time, 1417 &wpa_s->beacon_rep_scan) && 1418 (diff.sec || diff.usec >= 8000)) { 1419 wpa_printf(MSG_DEBUG, 1420 "RRM: Ignore scan result for " MACSTR 1421 " due to old update (age(ms) %u, calculated age %u.%06u seconds)", 1422 MAC2STR(scan_res->res[i]->bssid), 1423 scan_res->res[i]->age, 1424 (unsigned int) diff.sec, 1425 (unsigned int) diff.usec); 1426 continue; 1427 } 1428 } else if (info->scan_start_tsf > 1429 scan_res->res[i]->parent_tsf) { 1430 continue; 1431 } 1432 1433 if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf, 1434 scan_res->res[i]->parent_tsf) < 0) 1435 break; 1436 } 1437 1438 if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf)) 1439 goto out; 1440 1441 wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf); 1442 1443 wpas_rrm_send_msr_report(wpa_s, buf); 1444 wpabuf_free(buf); 1445 1446out: 1447 wpas_clear_beacon_rep_data(wpa_s); 1448 return 1; 1449} 1450 1451 1452void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s) 1453{ 1454 struct beacon_rep_data *data = &wpa_s->beacon_rep_data; 1455 1456 eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL); 1457 bitfield_free(data->eids); 1458 os_free(data->scan_params.freqs); 1459 os_memset(data, 0, sizeof(*data)); 1460} 1461