1 /* 2 * WPA Supplicant - Scanning 3 * Copyright (c) 2003-2019, 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 "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "common/ieee802_11_defs.h" 14 #include "common/wpa_ctrl.h" 15 #include "config.h" 16 #include "wpa_supplicant_i.h" 17 #include "driver_i.h" 18 #include "wps_supplicant.h" 19 #include "p2p_supplicant.h" 20 #include "p2p/p2p.h" 21 #include "hs20_supplicant.h" 22 #include "notify.h" 23 #include "bss.h" 24 #include "scan.h" 25 #include "mesh.h" 26 27 28 static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) 29 { 30 struct wpa_ssid *ssid; 31 union wpa_event_data data; 32 33 ssid = wpa_supplicant_get_ssid(wpa_s); 34 if (ssid == NULL) 35 return; 36 37 if (wpa_s->current_ssid == NULL) { 38 wpa_s->current_ssid = ssid; 39 wpas_notify_network_changed(wpa_s); 40 } 41 wpa_supplicant_initiate_eapol(wpa_s); 42 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " 43 "network - generating associated event"); 44 os_memset(&data, 0, sizeof(data)); 45 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); 46 } 47 48 49 #ifdef CONFIG_WPS 50 static int wpas_wps_in_use(struct wpa_supplicant *wpa_s, 51 enum wps_request_type *req_type) 52 { 53 struct wpa_ssid *ssid; 54 int wps = 0; 55 56 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 57 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) 58 continue; 59 60 wps = 1; 61 *req_type = wpas_wps_get_req_type(ssid); 62 if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1")) 63 return 2; 64 } 65 66 #ifdef CONFIG_P2P 67 if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p && 68 !wpa_s->conf->p2p_disabled) { 69 wpa_s->wps->dev.p2p = 1; 70 if (!wps) { 71 wps = 1; 72 *req_type = WPS_REQ_ENROLLEE_INFO; 73 } 74 } 75 #endif /* CONFIG_P2P */ 76 77 return wps; 78 } 79 #endif /* CONFIG_WPS */ 80 81 82 static int wpa_setup_mac_addr_rand_params(struct wpa_driver_scan_params *params, 83 const u8 *mac_addr) 84 { 85 u8 *tmp; 86 87 if (params->mac_addr) { 88 params->mac_addr_mask = NULL; 89 os_free(params->mac_addr); 90 params->mac_addr = NULL; 91 } 92 93 params->mac_addr_rand = 1; 94 95 if (!mac_addr) 96 return 0; 97 98 tmp = os_malloc(2 * ETH_ALEN); 99 if (!tmp) 100 return -1; 101 102 os_memcpy(tmp, mac_addr, 2 * ETH_ALEN); 103 params->mac_addr = tmp; 104 params->mac_addr_mask = tmp + ETH_ALEN; 105 return 0; 106 } 107 108 109 /** 110 * wpa_supplicant_enabled_networks - Check whether there are enabled networks 111 * @wpa_s: Pointer to wpa_supplicant data 112 * Returns: 0 if no networks are enabled, >0 if networks are enabled 113 * 114 * This function is used to figure out whether any networks (or Interworking 115 * with enabled credentials and auto_interworking) are present in the current 116 * configuration. 117 */ 118 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s) 119 { 120 struct wpa_ssid *ssid = wpa_s->conf->ssid; 121 int count = 0, disabled = 0; 122 123 if (wpa_s->p2p_mgmt) 124 return 0; /* no normal network profiles on p2p_mgmt interface */ 125 126 while (ssid) { 127 if (!wpas_network_disabled(wpa_s, ssid)) 128 count++; 129 else 130 disabled++; 131 ssid = ssid->next; 132 } 133 if (wpa_s->conf->cred && wpa_s->conf->interworking && 134 wpa_s->conf->auto_interworking) 135 count++; 136 if (count == 0 && disabled > 0) { 137 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled " 138 "networks)", disabled); 139 } 140 return count; 141 } 142 143 144 static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, 145 struct wpa_ssid *ssid) 146 { 147 int min_temp_disabled = 0; 148 149 while (ssid) { 150 if (!wpas_network_disabled(wpa_s, ssid)) { 151 int temp_disabled = wpas_temp_disabled(wpa_s, ssid); 152 153 if (temp_disabled <= 0) 154 break; 155 156 if (!min_temp_disabled || 157 temp_disabled < min_temp_disabled) 158 min_temp_disabled = temp_disabled; 159 } 160 ssid = ssid->next; 161 } 162 163 /* ap_scan=2 mode - try to associate with each SSID. */ 164 if (ssid == NULL) { 165 wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " 166 "end of scan list - go back to beginning"); 167 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 168 wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0); 169 return; 170 } 171 if (ssid->next) { 172 /* Continue from the next SSID on the next attempt. */ 173 wpa_s->prev_scan_ssid = ssid; 174 } else { 175 /* Start from the beginning of the SSID list. */ 176 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 177 } 178 wpa_supplicant_associate(wpa_s, NULL, ssid); 179 } 180 181 182 static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit) 183 { 184 struct wpa_supplicant *wpa_s = work->wpa_s; 185 struct wpa_driver_scan_params *params = work->ctx; 186 int ret; 187 188 if (deinit) { 189 if (!work->started) { 190 wpa_scan_free_params(params); 191 return; 192 } 193 wpa_supplicant_notify_scanning(wpa_s, 0); 194 wpas_notify_scan_done(wpa_s, 0); 195 wpa_s->scan_work = NULL; 196 return; 197 } 198 199 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) && 200 wpa_s->wpa_state <= WPA_SCANNING) 201 wpa_setup_mac_addr_rand_params(params, wpa_s->mac_addr_scan); 202 203 if (wpas_update_random_addr_disassoc(wpa_s) < 0) { 204 wpa_msg(wpa_s, MSG_INFO, 205 "Failed to assign random MAC address for a scan"); 206 wpa_scan_free_params(params); 207 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1"); 208 radio_work_done(work); 209 return; 210 } 211 212 wpa_supplicant_notify_scanning(wpa_s, 1); 213 214 if (wpa_s->clear_driver_scan_cache) { 215 wpa_printf(MSG_DEBUG, 216 "Request driver to clear scan cache due to local BSS flush"); 217 params->only_new_results = 1; 218 } 219 ret = wpa_drv_scan(wpa_s, params); 220 /* 221 * Store the obtained vendor scan cookie (if any) in wpa_s context. 222 * The current design is to allow only one scan request on each 223 * interface, hence having this scan cookie stored in wpa_s context is 224 * fine for now. 225 * 226 * Revisit this logic if concurrent scan operations per interface 227 * is supported. 228 */ 229 if (ret == 0) 230 wpa_s->curr_scan_cookie = params->scan_cookie; 231 wpa_scan_free_params(params); 232 work->ctx = NULL; 233 if (ret) { 234 int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ && 235 !wpa_s->beacon_rep_data.token; 236 237 if (wpa_s->disconnected) 238 retry = 0; 239 240 /* do not retry if operation is not supported */ 241 if (ret == -EOPNOTSUPP) 242 retry = 0; 243 244 wpa_supplicant_notify_scanning(wpa_s, 0); 245 wpas_notify_scan_done(wpa_s, 0); 246 if (wpa_s->wpa_state == WPA_SCANNING) 247 wpa_supplicant_set_state(wpa_s, 248 wpa_s->scan_prev_wpa_state); 249 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s", 250 ret, retry ? " retry=1" : ""); 251 radio_work_done(work); 252 253 if (retry) { 254 /* Restore scan_req since we will try to scan again */ 255 wpa_s->scan_req = wpa_s->last_scan_req; 256 wpa_supplicant_req_scan(wpa_s, 1, 0); 257 } else if (wpa_s->scan_res_handler) { 258 /* Clear the scan_res_handler */ 259 wpa_s->scan_res_handler = NULL; 260 } 261 262 if (wpa_s->beacon_rep_data.token) 263 wpas_rrm_refuse_request(wpa_s); 264 265 return; 266 } 267 268 os_get_reltime(&wpa_s->scan_trigger_time); 269 wpa_s->scan_runs++; 270 wpa_s->normal_scans++; 271 wpa_s->own_scan_requested = 1; 272 wpa_s->clear_driver_scan_cache = 0; 273 wpa_s->scan_work = work; 274 } 275 276 277 /** 278 * wpa_supplicant_trigger_scan - Request driver to start a scan 279 * @wpa_s: Pointer to wpa_supplicant data 280 * @params: Scan parameters 281 * Returns: 0 on success, -1 on failure 282 */ 283 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, 284 struct wpa_driver_scan_params *params) 285 { 286 struct wpa_driver_scan_params *ctx; 287 288 if (wpa_s->scan_work) { 289 wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending"); 290 return -1; 291 } 292 293 ctx = wpa_scan_clone_params(params); 294 if (!ctx || 295 radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0) 296 { 297 wpa_scan_free_params(ctx); 298 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1"); 299 return -1; 300 } 301 302 return 0; 303 } 304 305 306 static void 307 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) 308 { 309 struct wpa_supplicant *wpa_s = eloop_ctx; 310 311 wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan"); 312 313 if (wpa_supplicant_req_sched_scan(wpa_s)) 314 wpa_supplicant_req_scan(wpa_s, 0, 0); 315 } 316 317 318 static void 319 wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) 320 { 321 struct wpa_supplicant *wpa_s = eloop_ctx; 322 323 wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); 324 325 wpa_s->sched_scan_timed_out = 1; 326 wpa_supplicant_cancel_sched_scan(wpa_s); 327 } 328 329 330 static int 331 wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, 332 struct wpa_driver_scan_params *params) 333 { 334 int ret; 335 336 wpa_supplicant_notify_scanning(wpa_s, 1); 337 ret = wpa_drv_sched_scan(wpa_s, params); 338 if (ret) 339 wpa_supplicant_notify_scanning(wpa_s, 0); 340 else 341 wpa_s->sched_scanning = 1; 342 343 return ret; 344 } 345 346 347 static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) 348 { 349 int ret; 350 351 ret = wpa_drv_stop_sched_scan(wpa_s); 352 if (ret) { 353 wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); 354 /* TODO: what to do if stopping fails? */ 355 return -1; 356 } 357 358 return ret; 359 } 360 361 362 static struct wpa_driver_scan_filter * 363 wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) 364 { 365 struct wpa_driver_scan_filter *ssids; 366 struct wpa_ssid *ssid; 367 size_t count; 368 369 *num_ssids = 0; 370 if (!conf->filter_ssids) 371 return NULL; 372 373 for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { 374 if (ssid->ssid && ssid->ssid_len) 375 count++; 376 } 377 if (count == 0) 378 return NULL; 379 ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter)); 380 if (ssids == NULL) 381 return NULL; 382 383 for (ssid = conf->ssid; ssid; ssid = ssid->next) { 384 if (!ssid->ssid || !ssid->ssid_len) 385 continue; 386 os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); 387 ssids[*num_ssids].ssid_len = ssid->ssid_len; 388 (*num_ssids)++; 389 } 390 391 return ssids; 392 } 393 394 395 static void wpa_supplicant_optimize_freqs( 396 struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) 397 { 398 #ifdef CONFIG_P2P 399 if (params->freqs == NULL && wpa_s->p2p_in_provisioning && 400 wpa_s->go_params) { 401 /* Optimize provisioning state scan based on GO information */ 402 if (wpa_s->p2p_in_provisioning < 5 && 403 wpa_s->go_params->freq > 0) { 404 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " 405 "preferred frequency %d MHz", 406 wpa_s->go_params->freq); 407 params->freqs = os_calloc(2, sizeof(int)); 408 if (params->freqs) 409 params->freqs[0] = wpa_s->go_params->freq; 410 } else if (wpa_s->p2p_in_provisioning < 8 && 411 wpa_s->go_params->freq_list[0]) { 412 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " 413 "channels"); 414 int_array_concat(¶ms->freqs, 415 wpa_s->go_params->freq_list); 416 if (params->freqs) 417 int_array_sort_unique(params->freqs); 418 } 419 wpa_s->p2p_in_provisioning++; 420 } 421 422 if (params->freqs == NULL && wpa_s->p2p_in_invitation) { 423 /* 424 * Optimize scan based on GO information during persistent 425 * group reinvocation 426 */ 427 if (wpa_s->p2p_in_invitation < 5 && 428 wpa_s->p2p_invite_go_freq > 0) { 429 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation", 430 wpa_s->p2p_invite_go_freq); 431 params->freqs = os_calloc(2, sizeof(int)); 432 if (params->freqs) 433 params->freqs[0] = wpa_s->p2p_invite_go_freq; 434 } 435 wpa_s->p2p_in_invitation++; 436 if (wpa_s->p2p_in_invitation > 20) { 437 /* 438 * This should not really happen since the variable is 439 * cleared on group removal, but if it does happen, make 440 * sure we do not get stuck in special invitation scan 441 * mode. 442 */ 443 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation"); 444 wpa_s->p2p_in_invitation = 0; 445 } 446 } 447 #endif /* CONFIG_P2P */ 448 449 #ifdef CONFIG_WPS 450 if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { 451 /* 452 * Optimize post-provisioning scan based on channel used 453 * during provisioning. 454 */ 455 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " 456 "that was used during provisioning", wpa_s->wps_freq); 457 params->freqs = os_calloc(2, sizeof(int)); 458 if (params->freqs) 459 params->freqs[0] = wpa_s->wps_freq; 460 wpa_s->after_wps--; 461 } else if (wpa_s->after_wps) 462 wpa_s->after_wps--; 463 464 if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq) 465 { 466 /* Optimize provisioning scan based on already known channel */ 467 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz", 468 wpa_s->wps_freq); 469 params->freqs = os_calloc(2, sizeof(int)); 470 if (params->freqs) 471 params->freqs[0] = wpa_s->wps_freq; 472 wpa_s->known_wps_freq = 0; /* only do this once */ 473 } 474 #endif /* CONFIG_WPS */ 475 } 476 477 478 #ifdef CONFIG_INTERWORKING 479 static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s, 480 struct wpabuf *buf) 481 { 482 wpabuf_put_u8(buf, WLAN_EID_INTERWORKING); 483 wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 : 484 1 + ETH_ALEN); 485 wpabuf_put_u8(buf, wpa_s->conf->access_network_type); 486 /* No Venue Info */ 487 if (!is_zero_ether_addr(wpa_s->conf->hessid)) 488 wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN); 489 } 490 #endif /* CONFIG_INTERWORKING */ 491 492 493 #ifdef CONFIG_MBO 494 static void wpas_fils_req_param_add_max_channel(struct wpa_supplicant *wpa_s, 495 struct wpabuf **ie) 496 { 497 if (wpabuf_resize(ie, 5)) { 498 wpa_printf(MSG_DEBUG, 499 "Failed to allocate space for FILS Request Parameters element"); 500 return; 501 } 502 503 /* FILS Request Parameters element */ 504 wpabuf_put_u8(*ie, WLAN_EID_EXTENSION); 505 wpabuf_put_u8(*ie, 3); /* FILS Request attribute length */ 506 wpabuf_put_u8(*ie, WLAN_EID_EXT_FILS_REQ_PARAMS); 507 /* Parameter control bitmap */ 508 wpabuf_put_u8(*ie, 0); 509 /* Max Channel Time field - contains the value of MaxChannelTime 510 * parameter of the MLME-SCAN.request primitive represented in units of 511 * TUs, as an unsigned integer. A Max Channel Time field value of 255 512 * is used to indicate any duration of more than 254 TUs, or an 513 * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178) 514 */ 515 wpabuf_put_u8(*ie, 255); 516 } 517 #endif /* CONFIG_MBO */ 518 519 520 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s) 521 { 522 struct wpabuf *default_ies = NULL; 523 u8 ext_capab[18]; 524 int ext_capab_len, frame_id; 525 enum wpa_driver_if_type type = WPA_IF_STATION; 526 527 #ifdef CONFIG_P2P 528 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT) 529 type = WPA_IF_P2P_CLIENT; 530 #endif /* CONFIG_P2P */ 531 532 wpa_drv_get_ext_capa(wpa_s, type); 533 534 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 535 sizeof(ext_capab)); 536 if (ext_capab_len > 0 && 537 wpabuf_resize(&default_ies, ext_capab_len) == 0) 538 wpabuf_put_data(default_ies, ext_capab, ext_capab_len); 539 540 #ifdef CONFIG_MBO 541 if (wpa_s->enable_oce & OCE_STA) 542 wpas_fils_req_param_add_max_channel(wpa_s, &default_ies); 543 /* Send MBO and OCE capabilities */ 544 if (wpabuf_resize(&default_ies, 12) == 0) 545 wpas_mbo_scan_ie(wpa_s, default_ies); 546 #endif /* CONFIG_MBO */ 547 548 if (type == WPA_IF_P2P_CLIENT) 549 frame_id = VENDOR_ELEM_PROBE_REQ_P2P; 550 else 551 frame_id = VENDOR_ELEM_PROBE_REQ; 552 553 if (wpa_s->vendor_elem[frame_id]) { 554 size_t len; 555 556 len = wpabuf_len(wpa_s->vendor_elem[frame_id]); 557 if (len > 0 && wpabuf_resize(&default_ies, len) == 0) 558 wpabuf_put_buf(default_ies, 559 wpa_s->vendor_elem[frame_id]); 560 } 561 562 if (default_ies) 563 wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies), 564 wpabuf_len(default_ies)); 565 wpabuf_free(default_ies); 566 } 567 568 569 static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s) 570 { 571 struct wpabuf *extra_ie = NULL; 572 u8 ext_capab[18]; 573 int ext_capab_len; 574 #ifdef CONFIG_WPS 575 int wps = 0; 576 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; 577 #endif /* CONFIG_WPS */ 578 579 #ifdef CONFIG_P2P 580 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT) 581 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT); 582 else 583 #endif /* CONFIG_P2P */ 584 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION); 585 586 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 587 sizeof(ext_capab)); 588 if (ext_capab_len > 0 && 589 wpabuf_resize(&extra_ie, ext_capab_len) == 0) 590 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len); 591 592 #ifdef CONFIG_INTERWORKING 593 if (wpa_s->conf->interworking && 594 wpabuf_resize(&extra_ie, 100) == 0) 595 wpas_add_interworking_elements(wpa_s, extra_ie); 596 #endif /* CONFIG_INTERWORKING */ 597 598 #ifdef CONFIG_MBO 599 if (wpa_s->enable_oce & OCE_STA) 600 wpas_fils_req_param_add_max_channel(wpa_s, &extra_ie); 601 #endif /* CONFIG_MBO */ 602 603 #ifdef CONFIG_WPS 604 wps = wpas_wps_in_use(wpa_s, &req_type); 605 606 if (wps) { 607 struct wpabuf *wps_ie; 608 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON : 609 DEV_PW_DEFAULT, 610 &wpa_s->wps->dev, 611 wpa_s->wps->uuid, req_type, 612 0, NULL); 613 if (wps_ie) { 614 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0) 615 wpabuf_put_buf(extra_ie, wps_ie); 616 wpabuf_free(wps_ie); 617 } 618 } 619 620 #ifdef CONFIG_P2P 621 if (wps) { 622 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); 623 if (wpabuf_resize(&extra_ie, ielen) == 0) 624 wpas_p2p_scan_ie(wpa_s, extra_ie); 625 } 626 #endif /* CONFIG_P2P */ 627 628 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie); 629 630 #endif /* CONFIG_WPS */ 631 632 #ifdef CONFIG_HS20 633 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 9) == 0) 634 wpas_hs20_add_indication(extra_ie, -1, 0); 635 #endif /* CONFIG_HS20 */ 636 637 #ifdef CONFIG_FST 638 if (wpa_s->fst_ies && 639 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0) 640 wpabuf_put_buf(extra_ie, wpa_s->fst_ies); 641 #endif /* CONFIG_FST */ 642 643 #ifdef CONFIG_MBO 644 /* Send MBO and OCE capabilities */ 645 if (wpabuf_resize(&extra_ie, 12) == 0) 646 wpas_mbo_scan_ie(wpa_s, extra_ie); 647 #endif /* CONFIG_MBO */ 648 649 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) { 650 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]; 651 652 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0) 653 wpabuf_put_buf(extra_ie, buf); 654 } 655 656 return extra_ie; 657 } 658 659 660 #ifdef CONFIG_P2P 661 662 /* 663 * Check whether there are any enabled networks or credentials that could be 664 * used for a non-P2P connection. 665 */ 666 static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s) 667 { 668 struct wpa_ssid *ssid; 669 670 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 671 if (wpas_network_disabled(wpa_s, ssid)) 672 continue; 673 if (!ssid->p2p_group) 674 return 1; 675 } 676 677 if (wpa_s->conf->cred && wpa_s->conf->interworking && 678 wpa_s->conf->auto_interworking) 679 return 1; 680 681 return 0; 682 } 683 684 #endif /* CONFIG_P2P */ 685 686 687 int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s, 688 enum hostapd_hw_mode band, 689 struct wpa_driver_scan_params *params, bool is_6ghz) 690 { 691 /* Include only supported channels for the specified band */ 692 struct hostapd_hw_modes *mode; 693 int num_chans = 0; 694 int *freqs, i; 695 696 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band, is_6ghz); 697 if (!mode) 698 return -1; 699 700 if (params->freqs) { 701 while (params->freqs[num_chans]) 702 num_chans++; 703 } 704 705 freqs = os_realloc(params->freqs, 706 (num_chans + mode->num_channels + 1) * sizeof(int)); 707 if (!freqs) 708 return -1; 709 710 params->freqs = freqs; 711 for (i = 0; i < mode->num_channels; i++) { 712 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 713 continue; 714 params->freqs[num_chans++] = mode->channels[i].freq; 715 } 716 params->freqs[num_chans] = 0; 717 718 return 0; 719 } 720 721 722 static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s, 723 struct wpa_driver_scan_params *params) 724 { 725 if (wpa_s->hw.modes == NULL) 726 return; /* unknown what channels the driver supports */ 727 if (params->freqs) 728 return; /* already using a limited channel set */ 729 730 if (wpa_s->setband_mask & WPA_SETBAND_5G) 731 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, params, 732 0); 733 if (wpa_s->setband_mask & WPA_SETBAND_2G) 734 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, params, 735 0); 736 if (wpa_s->setband_mask & WPA_SETBAND_6G) 737 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, params, 738 1); 739 } 740 741 742 static void wpa_add_scan_ssid(struct wpa_supplicant *wpa_s, 743 struct wpa_driver_scan_params *params, 744 size_t max_ssids, const u8 *ssid, size_t ssid_len) 745 { 746 unsigned int j; 747 748 for (j = 0; j < params->num_ssids; j++) { 749 if (params->ssids[j].ssid_len == ssid_len && 750 params->ssids[j].ssid && 751 os_memcmp(params->ssids[j].ssid, ssid, ssid_len) == 0) 752 return; /* already in the list */ 753 } 754 755 if (params->num_ssids + 1 > max_ssids) { 756 wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request"); 757 return; 758 } 759 760 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s", 761 wpa_ssid_txt(ssid, ssid_len)); 762 763 params->ssids[params->num_ssids].ssid = ssid; 764 params->ssids[params->num_ssids].ssid_len = ssid_len; 765 params->num_ssids++; 766 } 767 768 769 static void wpa_add_owe_scan_ssid(struct wpa_supplicant *wpa_s, 770 struct wpa_driver_scan_params *params, 771 struct wpa_ssid *ssid, size_t max_ssids) 772 { 773 #ifdef CONFIG_OWE 774 struct wpa_bss *bss; 775 776 if (!(ssid->key_mgmt & WPA_KEY_MGMT_OWE)) 777 return; 778 779 wpa_printf(MSG_DEBUG, "OWE: Look for transition mode AP. ssid=%s", 780 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 781 782 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 783 const u8 *owe, *pos, *end; 784 const u8 *owe_ssid; 785 size_t owe_ssid_len; 786 787 if (bss->ssid_len != ssid->ssid_len || 788 os_memcmp(bss->ssid, ssid->ssid, ssid->ssid_len) != 0) 789 continue; 790 791 owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE); 792 if (!owe || owe[1] < 4) 793 continue; 794 795 pos = owe + 6; 796 end = owe + 2 + owe[1]; 797 798 /* Must include BSSID and ssid_len */ 799 if (end - pos < ETH_ALEN + 1) 800 return; 801 802 /* Skip BSSID */ 803 pos += ETH_ALEN; 804 owe_ssid_len = *pos++; 805 owe_ssid = pos; 806 807 if ((size_t) (end - pos) < owe_ssid_len || 808 owe_ssid_len > SSID_MAX_LEN) 809 return; 810 811 wpa_printf(MSG_DEBUG, 812 "OWE: scan_ssids: transition mode OWE ssid=%s", 813 wpa_ssid_txt(owe_ssid, owe_ssid_len)); 814 815 wpa_add_scan_ssid(wpa_s, params, max_ssids, 816 owe_ssid, owe_ssid_len); 817 return; 818 } 819 #endif /* CONFIG_OWE */ 820 } 821 822 823 static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s, 824 struct wpa_driver_scan_params *params, 825 size_t max_ssids) 826 { 827 unsigned int i; 828 struct wpa_ssid *ssid; 829 830 /* 831 * For devices with max_ssids greater than 1, leave the last slot empty 832 * for adding the wildcard scan entry. 833 */ 834 max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids; 835 836 for (i = 0; i < wpa_s->scan_id_count; i++) { 837 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]); 838 if (!ssid) 839 continue; 840 if (ssid->scan_ssid) 841 wpa_add_scan_ssid(wpa_s, params, max_ssids, 842 ssid->ssid, ssid->ssid_len); 843 /* 844 * Also add the SSID of the OWE BSS, to allow discovery of 845 * transition mode APs more quickly. 846 */ 847 wpa_add_owe_scan_ssid(wpa_s, params, ssid, max_ssids); 848 } 849 850 wpa_s->scan_id_count = 0; 851 } 852 853 854 static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s, 855 struct wpa_driver_scan_params *params, 856 size_t max_ssids) 857 { 858 unsigned int i; 859 860 if (wpa_s->ssids_from_scan_req == NULL || 861 wpa_s->num_ssids_from_scan_req == 0) 862 return 0; 863 864 if (wpa_s->num_ssids_from_scan_req > max_ssids) { 865 wpa_s->num_ssids_from_scan_req = max_ssids; 866 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u", 867 (unsigned int) max_ssids); 868 } 869 870 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) { 871 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid; 872 params->ssids[i].ssid_len = 873 wpa_s->ssids_from_scan_req[i].ssid_len; 874 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID", 875 params->ssids[i].ssid, 876 params->ssids[i].ssid_len); 877 } 878 879 params->num_ssids = wpa_s->num_ssids_from_scan_req; 880 wpa_s->num_ssids_from_scan_req = 0; 881 return 1; 882 } 883 884 885 static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) 886 { 887 struct wpa_supplicant *wpa_s = eloop_ctx; 888 struct wpa_ssid *ssid; 889 int ret, p2p_in_prog; 890 struct wpabuf *extra_ie = NULL; 891 struct wpa_driver_scan_params params; 892 struct wpa_driver_scan_params *scan_params; 893 size_t max_ssids; 894 int connect_without_scan = 0; 895 896 wpa_s->ignore_post_flush_scan_res = 0; 897 898 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { 899 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); 900 return; 901 } 902 903 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) { 904 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan"); 905 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 906 return; 907 } 908 909 if (wpa_s->scanning) { 910 /* 911 * If we are already in scanning state, we shall reschedule the 912 * the incoming scan request. 913 */ 914 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req"); 915 wpa_supplicant_req_scan(wpa_s, 1, 0); 916 return; 917 } 918 919 if (!wpa_supplicant_enabled_networks(wpa_s) && 920 wpa_s->scan_req == NORMAL_SCAN_REQ) { 921 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); 922 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); 923 return; 924 } 925 926 if (wpa_s->conf->ap_scan != 0 && 927 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { 928 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " 929 "overriding ap_scan configuration"); 930 wpa_s->conf->ap_scan = 0; 931 wpas_notify_ap_scan_changed(wpa_s); 932 } 933 934 if (wpa_s->conf->ap_scan == 0) { 935 wpa_supplicant_gen_assoc_event(wpa_s); 936 return; 937 } 938 939 ssid = NULL; 940 if (wpa_s->scan_req != MANUAL_SCAN_REQ && 941 wpa_s->connect_without_scan) { 942 connect_without_scan = 1; 943 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 944 if (ssid == wpa_s->connect_without_scan) 945 break; 946 } 947 } 948 949 p2p_in_prog = wpas_p2p_in_progress(wpa_s); 950 if (p2p_in_prog && p2p_in_prog != 2 && 951 (!ssid || 952 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) { 953 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress"); 954 wpa_supplicant_req_scan(wpa_s, 5, 0); 955 return; 956 } 957 958 /* 959 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are 960 * used for changing modes inside wpa_supplicant (roaming, 961 * auto-reconnect, etc). Discarding the scan might hurt these processes. 962 * The normal use case for PNO is to suspend the host immediately after 963 * starting PNO, so the periodic 100 ms attempts to run the scan do not 964 * normally happen in practice multiple times, i.e., this is simply 965 * restarting scanning once the host is woken up and PNO stopped. 966 */ 967 if (wpa_s->pno || wpa_s->pno_sched_pending) { 968 wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress"); 969 wpa_supplicant_req_scan(wpa_s, 0, 100000); 970 return; 971 } 972 973 if (wpa_s->conf->ap_scan == 2) 974 max_ssids = 1; 975 else { 976 max_ssids = wpa_s->max_scan_ssids; 977 if (max_ssids > WPAS_MAX_SCAN_SSIDS) 978 max_ssids = WPAS_MAX_SCAN_SSIDS; 979 } 980 981 wpa_s->last_scan_req = wpa_s->scan_req; 982 wpa_s->scan_req = NORMAL_SCAN_REQ; 983 984 if (connect_without_scan) { 985 wpa_s->connect_without_scan = NULL; 986 if (ssid) { 987 wpa_printf(MSG_DEBUG, "Start a pre-selected network " 988 "without scan step"); 989 wpa_supplicant_associate(wpa_s, NULL, ssid); 990 return; 991 } 992 } 993 994 os_memset(¶ms, 0, sizeof(params)); 995 996 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state; 997 if (wpa_s->wpa_state == WPA_DISCONNECTED || 998 wpa_s->wpa_state == WPA_INACTIVE) 999 wpa_supplicant_set_state(wpa_s, WPA_SCANNING); 1000 1001 /* 1002 * If autoscan has set its own scanning parameters 1003 */ 1004 if (wpa_s->autoscan_params != NULL) { 1005 scan_params = wpa_s->autoscan_params; 1006 goto scan; 1007 } 1008 1009 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 1010 wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) { 1011 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command"); 1012 goto ssid_list_set; 1013 } 1014 1015 #ifdef CONFIG_P2P 1016 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) && 1017 wpa_s->go_params && !wpa_s->conf->passive_scan) { 1018 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)", 1019 wpa_s->p2p_in_provisioning, 1020 wpa_s->show_group_started); 1021 params.ssids[0].ssid = wpa_s->go_params->ssid; 1022 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len; 1023 params.num_ssids = 1; 1024 goto ssid_list_set; 1025 } 1026 1027 if (wpa_s->p2p_in_invitation) { 1028 if (wpa_s->current_ssid) { 1029 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation"); 1030 params.ssids[0].ssid = wpa_s->current_ssid->ssid; 1031 params.ssids[0].ssid_len = 1032 wpa_s->current_ssid->ssid_len; 1033 params.num_ssids = 1; 1034 } else { 1035 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation"); 1036 } 1037 goto ssid_list_set; 1038 } 1039 #endif /* CONFIG_P2P */ 1040 1041 /* Find the starting point from which to continue scanning */ 1042 ssid = wpa_s->conf->ssid; 1043 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { 1044 while (ssid) { 1045 if (ssid == wpa_s->prev_scan_ssid) { 1046 ssid = ssid->next; 1047 break; 1048 } 1049 ssid = ssid->next; 1050 } 1051 } 1052 1053 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ && 1054 #ifdef CONFIG_AP 1055 !wpa_s->ap_iface && 1056 #endif /* CONFIG_AP */ 1057 wpa_s->conf->ap_scan == 2) { 1058 wpa_s->connect_without_scan = NULL; 1059 wpa_s->prev_scan_wildcard = 0; 1060 wpa_supplicant_assoc_try(wpa_s, ssid); 1061 return; 1062 } else if (wpa_s->conf->ap_scan == 2) { 1063 /* 1064 * User-initiated scan request in ap_scan == 2; scan with 1065 * wildcard SSID. 1066 */ 1067 ssid = NULL; 1068 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) { 1069 /* 1070 * Perform single-channel single-SSID scan for 1071 * reassociate-to-same-BSS operation. 1072 */ 1073 /* Setup SSID */ 1074 ssid = wpa_s->current_ssid; 1075 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", 1076 ssid->ssid, ssid->ssid_len); 1077 params.ssids[0].ssid = ssid->ssid; 1078 params.ssids[0].ssid_len = ssid->ssid_len; 1079 params.num_ssids = 1; 1080 1081 /* 1082 * Allocate memory for frequency array, allocate one extra 1083 * slot for the zero-terminator. 1084 */ 1085 params.freqs = os_malloc(sizeof(int) * 2); 1086 if (params.freqs) { 1087 params.freqs[0] = wpa_s->assoc_freq; 1088 params.freqs[1] = 0; 1089 } 1090 1091 /* 1092 * Reset the reattach flag so that we fall back to full scan if 1093 * this scan fails. 1094 */ 1095 wpa_s->reattach = 0; 1096 } else { 1097 struct wpa_ssid *start = ssid, *tssid; 1098 int freqs_set = 0; 1099 if (ssid == NULL && max_ssids > 1) 1100 ssid = wpa_s->conf->ssid; 1101 while (ssid) { 1102 if (!wpas_network_disabled(wpa_s, ssid) && 1103 ssid->scan_ssid) { 1104 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", 1105 ssid->ssid, ssid->ssid_len); 1106 params.ssids[params.num_ssids].ssid = 1107 ssid->ssid; 1108 params.ssids[params.num_ssids].ssid_len = 1109 ssid->ssid_len; 1110 params.num_ssids++; 1111 if (params.num_ssids + 1 >= max_ssids) 1112 break; 1113 } 1114 1115 if (!wpas_network_disabled(wpa_s, ssid)) { 1116 /* 1117 * Also add the SSID of the OWE BSS, to allow 1118 * discovery of transition mode APs more 1119 * quickly. 1120 */ 1121 wpa_add_owe_scan_ssid(wpa_s, ¶ms, ssid, 1122 max_ssids); 1123 } 1124 1125 ssid = ssid->next; 1126 if (ssid == start) 1127 break; 1128 if (ssid == NULL && max_ssids > 1 && 1129 start != wpa_s->conf->ssid) 1130 ssid = wpa_s->conf->ssid; 1131 } 1132 1133 if (wpa_s->scan_id_count && 1134 wpa_s->last_scan_req == MANUAL_SCAN_REQ) 1135 wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids); 1136 1137 for (tssid = wpa_s->conf->ssid; 1138 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid; 1139 tssid = tssid->next) { 1140 if (wpas_network_disabled(wpa_s, tssid)) 1141 continue; 1142 if (((params.freqs || !freqs_set) && 1143 tssid->scan_freq) && 1144 int_array_len(params.freqs) < 100) { 1145 int_array_concat(¶ms.freqs, 1146 tssid->scan_freq); 1147 } else { 1148 os_free(params.freqs); 1149 params.freqs = NULL; 1150 } 1151 freqs_set = 1; 1152 } 1153 int_array_sort_unique(params.freqs); 1154 } 1155 1156 if (ssid && max_ssids == 1) { 1157 /* 1158 * If the driver is limited to 1 SSID at a time interleave 1159 * wildcard SSID scans with specific SSID scans to avoid 1160 * waiting a long time for a wildcard scan. 1161 */ 1162 if (!wpa_s->prev_scan_wildcard) { 1163 params.ssids[0].ssid = NULL; 1164 params.ssids[0].ssid_len = 0; 1165 wpa_s->prev_scan_wildcard = 1; 1166 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for " 1167 "wildcard SSID (Interleave with specific)"); 1168 } else { 1169 wpa_s->prev_scan_ssid = ssid; 1170 wpa_s->prev_scan_wildcard = 0; 1171 wpa_dbg(wpa_s, MSG_DEBUG, 1172 "Starting AP scan for specific SSID: %s", 1173 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1174 } 1175 } else if (ssid) { 1176 /* max_ssids > 1 */ 1177 1178 wpa_s->prev_scan_ssid = ssid; 1179 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " 1180 "the scan request"); 1181 params.num_ssids++; 1182 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 1183 wpa_s->manual_scan_passive && params.num_ssids == 0) { 1184 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request"); 1185 } else if (wpa_s->conf->passive_scan) { 1186 wpa_dbg(wpa_s, MSG_DEBUG, 1187 "Use passive scan based on configuration"); 1188 } else { 1189 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 1190 params.num_ssids++; 1191 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " 1192 "SSID"); 1193 } 1194 1195 ssid_list_set: 1196 wpa_supplicant_optimize_freqs(wpa_s, ¶ms); 1197 extra_ie = wpa_supplicant_extra_ies(wpa_s); 1198 1199 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 1200 wpa_s->manual_scan_only_new) { 1201 wpa_printf(MSG_DEBUG, 1202 "Request driver to clear scan cache due to manual only_new=1 scan"); 1203 params.only_new_results = 1; 1204 } 1205 1206 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL && 1207 wpa_s->manual_scan_freqs) { 1208 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels"); 1209 params.freqs = wpa_s->manual_scan_freqs; 1210 wpa_s->manual_scan_freqs = NULL; 1211 } 1212 1213 if (params.freqs == NULL && wpa_s->select_network_scan_freqs) { 1214 wpa_dbg(wpa_s, MSG_DEBUG, 1215 "Limit select_network scan to specified channels"); 1216 params.freqs = wpa_s->select_network_scan_freqs; 1217 wpa_s->select_network_scan_freqs = NULL; 1218 } 1219 1220 if (params.freqs == NULL && wpa_s->next_scan_freqs) { 1221 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " 1222 "generated frequency list"); 1223 params.freqs = wpa_s->next_scan_freqs; 1224 } else 1225 os_free(wpa_s->next_scan_freqs); 1226 wpa_s->next_scan_freqs = NULL; 1227 wpa_setband_scan_freqs(wpa_s, ¶ms); 1228 1229 /* See if user specified frequencies. If so, scan only those. */ 1230 if (wpa_s->last_scan_req == INITIAL_SCAN_REQ && 1231 wpa_s->conf->initial_freq_list && !params.freqs) { 1232 wpa_dbg(wpa_s, MSG_DEBUG, 1233 "Optimize scan based on conf->initial_freq_list"); 1234 int_array_concat(¶ms.freqs, wpa_s->conf->initial_freq_list); 1235 } else if (wpa_s->conf->freq_list && !params.freqs) { 1236 wpa_dbg(wpa_s, MSG_DEBUG, 1237 "Optimize scan based on conf->freq_list"); 1238 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); 1239 } 1240 1241 /* Use current associated channel? */ 1242 if (wpa_s->conf->scan_cur_freq && !params.freqs) { 1243 unsigned int num = wpa_s->num_multichan_concurrent; 1244 1245 params.freqs = os_calloc(num + 1, sizeof(int)); 1246 if (params.freqs) { 1247 num = get_shared_radio_freqs(wpa_s, params.freqs, num); 1248 if (num > 0) { 1249 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the " 1250 "current operating channels since " 1251 "scan_cur_freq is enabled"); 1252 } else { 1253 os_free(params.freqs); 1254 params.freqs = NULL; 1255 } 1256 } 1257 } 1258 1259 #ifdef CONFIG_MBO 1260 if (wpa_s->enable_oce & OCE_STA) 1261 params.oce_scan = 1; 1262 #endif /* CONFIG_MBO */ 1263 1264 params.filter_ssids = wpa_supplicant_build_filter_ssids( 1265 wpa_s->conf, ¶ms.num_filter_ssids); 1266 if (extra_ie) { 1267 params.extra_ies = wpabuf_head(extra_ie); 1268 params.extra_ies_len = wpabuf_len(extra_ie); 1269 } 1270 1271 #ifdef CONFIG_P2P 1272 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation || 1273 (wpa_s->show_group_started && wpa_s->go_params)) { 1274 /* 1275 * The interface may not yet be in P2P mode, so we have to 1276 * explicitly request P2P probe to disable CCK rates. 1277 */ 1278 params.p2p_probe = 1; 1279 } 1280 #endif /* CONFIG_P2P */ 1281 1282 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) && 1283 wpa_s->wpa_state <= WPA_SCANNING) 1284 wpa_setup_mac_addr_rand_params(¶ms, wpa_s->mac_addr_scan); 1285 1286 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) { 1287 struct wpa_bss *bss; 1288 1289 params.bssid = wpa_s->next_scan_bssid; 1290 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid); 1291 if (!wpa_s->next_scan_bssid_wildcard_ssid && 1292 bss && bss->ssid_len && params.num_ssids == 1 && 1293 params.ssids[0].ssid_len == 0) { 1294 params.ssids[0].ssid = bss->ssid; 1295 params.ssids[0].ssid_len = bss->ssid_len; 1296 wpa_dbg(wpa_s, MSG_DEBUG, 1297 "Scan a previously specified BSSID " MACSTR 1298 " and SSID %s", 1299 MAC2STR(params.bssid), 1300 wpa_ssid_txt(bss->ssid, bss->ssid_len)); 1301 } else { 1302 wpa_dbg(wpa_s, MSG_DEBUG, 1303 "Scan a previously specified BSSID " MACSTR, 1304 MAC2STR(params.bssid)); 1305 } 1306 } 1307 1308 scan_params = ¶ms; 1309 1310 scan: 1311 #ifdef CONFIG_P2P 1312 /* 1313 * If the driver does not support multi-channel concurrency and a 1314 * virtual interface that shares the same radio with the wpa_s interface 1315 * is operating there may not be need to scan other channels apart from 1316 * the current operating channel on the other virtual interface. Filter 1317 * out other channels in case we are trying to find a connection for a 1318 * station interface when we are not configured to prefer station 1319 * connection and a concurrent operation is already in process. 1320 */ 1321 if (wpa_s->scan_for_connection && 1322 wpa_s->last_scan_req == NORMAL_SCAN_REQ && 1323 !scan_params->freqs && !params.freqs && 1324 wpas_is_p2p_prioritized(wpa_s) && 1325 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && 1326 non_p2p_network_enabled(wpa_s)) { 1327 unsigned int num = wpa_s->num_multichan_concurrent; 1328 1329 params.freqs = os_calloc(num + 1, sizeof(int)); 1330 if (params.freqs) { 1331 num = get_shared_radio_freqs(wpa_s, params.freqs, num); 1332 if (num > 0 && num == wpa_s->num_multichan_concurrent) { 1333 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used"); 1334 } else { 1335 os_free(params.freqs); 1336 params.freqs = NULL; 1337 } 1338 } 1339 } 1340 #endif /* CONFIG_P2P */ 1341 1342 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params); 1343 1344 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs && 1345 !wpa_s->manual_scan_freqs) { 1346 /* Restore manual_scan_freqs for the next attempt */ 1347 wpa_s->manual_scan_freqs = params.freqs; 1348 params.freqs = NULL; 1349 } 1350 1351 wpabuf_free(extra_ie); 1352 os_free(params.freqs); 1353 os_free(params.filter_ssids); 1354 os_free(params.mac_addr); 1355 1356 if (ret) { 1357 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); 1358 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state) 1359 wpa_supplicant_set_state(wpa_s, 1360 wpa_s->scan_prev_wpa_state); 1361 /* Restore scan_req since we will try to scan again */ 1362 wpa_s->scan_req = wpa_s->last_scan_req; 1363 wpa_supplicant_req_scan(wpa_s, 1, 0); 1364 } else { 1365 wpa_s->scan_for_connection = 0; 1366 #ifdef CONFIG_INTERWORKING 1367 wpa_s->interworking_fast_assoc_tried = 0; 1368 #endif /* CONFIG_INTERWORKING */ 1369 wpa_s->next_scan_bssid_wildcard_ssid = 0; 1370 if (params.bssid) 1371 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN); 1372 } 1373 } 1374 1375 1376 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec) 1377 { 1378 struct os_reltime remaining, new_int; 1379 int cancelled; 1380 1381 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL, 1382 &remaining); 1383 1384 new_int.sec = sec; 1385 new_int.usec = 0; 1386 if (cancelled && os_reltime_before(&remaining, &new_int)) { 1387 new_int.sec = remaining.sec; 1388 new_int.usec = remaining.usec; 1389 } 1390 1391 if (cancelled) { 1392 eloop_register_timeout(new_int.sec, new_int.usec, 1393 wpa_supplicant_scan, wpa_s, NULL); 1394 } 1395 wpa_s->scan_interval = sec; 1396 } 1397 1398 1399 /** 1400 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points 1401 * @wpa_s: Pointer to wpa_supplicant data 1402 * @sec: Number of seconds after which to scan 1403 * @usec: Number of microseconds after which to scan 1404 * 1405 * This function is used to schedule a scan for neighboring access points after 1406 * the specified time. 1407 */ 1408 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) 1409 { 1410 int res; 1411 1412 if (wpa_s->p2p_mgmt) { 1413 wpa_dbg(wpa_s, MSG_DEBUG, 1414 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface", 1415 sec, usec); 1416 return; 1417 } 1418 1419 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, 1420 NULL); 1421 if (res == 1) { 1422 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec", 1423 sec, usec); 1424 } else if (res == 0) { 1425 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner", 1426 sec, usec); 1427 } else { 1428 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec", 1429 sec, usec); 1430 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); 1431 } 1432 } 1433 1434 1435 /** 1436 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan 1437 * @wpa_s: Pointer to wpa_supplicant data 1438 * @sec: Number of seconds after which to scan 1439 * @usec: Number of microseconds after which to scan 1440 * Returns: 0 on success or -1 otherwise 1441 * 1442 * This function is used to schedule periodic scans for neighboring 1443 * access points after the specified time. 1444 */ 1445 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, 1446 int sec, int usec) 1447 { 1448 if (!wpa_s->sched_scan_supported) 1449 return -1; 1450 1451 eloop_register_timeout(sec, usec, 1452 wpa_supplicant_delayed_sched_scan_timeout, 1453 wpa_s, NULL); 1454 1455 return 0; 1456 } 1457 1458 1459 static void 1460 wpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s, 1461 struct wpa_driver_scan_params *params) 1462 { 1463 if (wpa_s->wpa_state != WPA_COMPLETED || 1464 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) || 1465 wpa_s->srp.relative_rssi_set == 0) 1466 return; 1467 1468 params->relative_rssi_set = 1; 1469 params->relative_rssi = wpa_s->srp.relative_rssi; 1470 1471 if (wpa_s->srp.relative_adjust_rssi == 0) 1472 return; 1473 1474 params->relative_adjust_band = wpa_s->srp.relative_adjust_band; 1475 params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi; 1476 } 1477 1478 1479 /** 1480 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan 1481 * @wpa_s: Pointer to wpa_supplicant data 1482 * Returns: 0 is sched_scan was started or -1 otherwise 1483 * 1484 * This function is used to schedule periodic scans for neighboring 1485 * access points repeating the scan continuously. 1486 */ 1487 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) 1488 { 1489 struct wpa_driver_scan_params params; 1490 struct wpa_driver_scan_params *scan_params; 1491 enum wpa_states prev_state; 1492 struct wpa_ssid *ssid = NULL; 1493 struct wpabuf *extra_ie = NULL; 1494 int ret; 1495 unsigned int max_sched_scan_ssids; 1496 int wildcard = 0; 1497 int need_ssids; 1498 struct sched_scan_plan scan_plan; 1499 1500 if (!wpa_s->sched_scan_supported) 1501 return -1; 1502 1503 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) 1504 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; 1505 else 1506 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; 1507 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload) 1508 return -1; 1509 1510 wpa_s->sched_scan_stop_req = 0; 1511 1512 if (wpa_s->sched_scanning) { 1513 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning"); 1514 return 0; 1515 } 1516 1517 need_ssids = 0; 1518 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 1519 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) { 1520 /* Use wildcard SSID to find this network */ 1521 wildcard = 1; 1522 } else if (!wpas_network_disabled(wpa_s, ssid) && 1523 ssid->ssid_len) 1524 need_ssids++; 1525 1526 #ifdef CONFIG_WPS 1527 if (!wpas_network_disabled(wpa_s, ssid) && 1528 ssid->key_mgmt == WPA_KEY_MGMT_WPS) { 1529 /* 1530 * Normal scan is more reliable and faster for WPS 1531 * operations and since these are for short periods of 1532 * time, the benefit of trying to use sched_scan would 1533 * be limited. 1534 */ 1535 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " 1536 "sched_scan for WPS"); 1537 return -1; 1538 } 1539 #endif /* CONFIG_WPS */ 1540 } 1541 if (wildcard) 1542 need_ssids++; 1543 1544 if (wpa_s->normal_scans < 3 && 1545 (need_ssids <= wpa_s->max_scan_ssids || 1546 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) { 1547 /* 1548 * When normal scan can speed up operations, use that for the 1549 * first operations before starting the sched_scan to allow 1550 * user space sleep more. We do this only if the normal scan 1551 * has functionality that is suitable for this or if the 1552 * sched_scan does not have better support for multiple SSIDs. 1553 */ 1554 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " 1555 "sched_scan for initial scans (normal_scans=%d)", 1556 wpa_s->normal_scans); 1557 return -1; 1558 } 1559 1560 os_memset(¶ms, 0, sizeof(params)); 1561 1562 /* If we can't allocate space for the filters, we just don't filter */ 1563 params.filter_ssids = os_calloc(wpa_s->max_match_sets, 1564 sizeof(struct wpa_driver_scan_filter)); 1565 1566 prev_state = wpa_s->wpa_state; 1567 if (wpa_s->wpa_state == WPA_DISCONNECTED || 1568 wpa_s->wpa_state == WPA_INACTIVE) 1569 wpa_supplicant_set_state(wpa_s, WPA_SCANNING); 1570 1571 if (wpa_s->autoscan_params != NULL) { 1572 scan_params = wpa_s->autoscan_params; 1573 goto scan; 1574 } 1575 1576 /* Find the starting point from which to continue scanning */ 1577 ssid = wpa_s->conf->ssid; 1578 if (wpa_s->prev_sched_ssid) { 1579 while (ssid) { 1580 if (ssid == wpa_s->prev_sched_ssid) { 1581 ssid = ssid->next; 1582 break; 1583 } 1584 ssid = ssid->next; 1585 } 1586 } 1587 1588 if (!ssid || !wpa_s->prev_sched_ssid) { 1589 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); 1590 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; 1591 wpa_s->first_sched_scan = 1; 1592 ssid = wpa_s->conf->ssid; 1593 wpa_s->prev_sched_ssid = ssid; 1594 } 1595 1596 if (wildcard) { 1597 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan"); 1598 params.num_ssids++; 1599 } 1600 1601 while (ssid) { 1602 if (wpas_network_disabled(wpa_s, ssid)) 1603 goto next; 1604 1605 if (params.num_filter_ssids < wpa_s->max_match_sets && 1606 params.filter_ssids && ssid->ssid && ssid->ssid_len) { 1607 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s", 1608 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1609 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid, 1610 ssid->ssid, ssid->ssid_len); 1611 params.filter_ssids[params.num_filter_ssids].ssid_len = 1612 ssid->ssid_len; 1613 params.num_filter_ssids++; 1614 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len) 1615 { 1616 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID " 1617 "filter for sched_scan - drop filter"); 1618 os_free(params.filter_ssids); 1619 params.filter_ssids = NULL; 1620 params.num_filter_ssids = 0; 1621 } 1622 1623 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) { 1624 if (params.num_ssids == max_sched_scan_ssids) 1625 break; /* only room for broadcast SSID */ 1626 wpa_dbg(wpa_s, MSG_DEBUG, 1627 "add to active scan ssid: %s", 1628 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1629 params.ssids[params.num_ssids].ssid = 1630 ssid->ssid; 1631 params.ssids[params.num_ssids].ssid_len = 1632 ssid->ssid_len; 1633 params.num_ssids++; 1634 if (params.num_ssids >= max_sched_scan_ssids) { 1635 wpa_s->prev_sched_ssid = ssid; 1636 do { 1637 ssid = ssid->next; 1638 } while (ssid && 1639 (wpas_network_disabled(wpa_s, ssid) || 1640 !ssid->scan_ssid)); 1641 break; 1642 } 1643 } 1644 1645 next: 1646 wpa_s->prev_sched_ssid = ssid; 1647 ssid = ssid->next; 1648 } 1649 1650 if (params.num_filter_ssids == 0) { 1651 os_free(params.filter_ssids); 1652 params.filter_ssids = NULL; 1653 } 1654 1655 extra_ie = wpa_supplicant_extra_ies(wpa_s); 1656 if (extra_ie) { 1657 params.extra_ies = wpabuf_head(extra_ie); 1658 params.extra_ies_len = wpabuf_len(extra_ie); 1659 } 1660 1661 if (wpa_s->conf->filter_rssi) 1662 params.filter_rssi = wpa_s->conf->filter_rssi; 1663 1664 /* See if user specified frequencies. If so, scan only those. */ 1665 if (wpa_s->conf->freq_list && !params.freqs) { 1666 wpa_dbg(wpa_s, MSG_DEBUG, 1667 "Optimize scan based on conf->freq_list"); 1668 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); 1669 } 1670 1671 #ifdef CONFIG_MBO 1672 if (wpa_s->enable_oce & OCE_STA) 1673 params.oce_scan = 1; 1674 #endif /* CONFIG_MBO */ 1675 1676 scan_params = ¶ms; 1677 1678 scan: 1679 wpa_s->sched_scan_timed_out = 0; 1680 1681 /* 1682 * We cannot support multiple scan plans if the scan request includes 1683 * too many SSID's, so in this case use only the last scan plan and make 1684 * it run infinitely. It will be stopped by the timeout. 1685 */ 1686 if (wpa_s->sched_scan_plans_num == 1 || 1687 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) { 1688 params.sched_scan_plans = wpa_s->sched_scan_plans; 1689 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; 1690 } else if (wpa_s->sched_scan_plans_num > 1) { 1691 wpa_dbg(wpa_s, MSG_DEBUG, 1692 "Too many SSIDs. Default to using single scheduled_scan plan"); 1693 params.sched_scan_plans = 1694 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num - 1695 1]; 1696 params.sched_scan_plans_num = 1; 1697 } else { 1698 if (wpa_s->conf->sched_scan_interval) 1699 scan_plan.interval = wpa_s->conf->sched_scan_interval; 1700 else 1701 scan_plan.interval = 10; 1702 1703 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) { 1704 wpa_printf(MSG_WARNING, 1705 "Scan interval too long(%u), use the maximum allowed(%u)", 1706 scan_plan.interval, 1707 wpa_s->max_sched_scan_plan_interval); 1708 scan_plan.interval = 1709 wpa_s->max_sched_scan_plan_interval; 1710 } 1711 1712 scan_plan.iterations = 0; 1713 params.sched_scan_plans = &scan_plan; 1714 params.sched_scan_plans_num = 1; 1715 } 1716 1717 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay; 1718 1719 if (ssid || !wpa_s->first_sched_scan) { 1720 wpa_dbg(wpa_s, MSG_DEBUG, 1721 "Starting sched scan after %u seconds: interval %u timeout %d", 1722 params.sched_scan_start_delay, 1723 params.sched_scan_plans[0].interval, 1724 wpa_s->sched_scan_timeout); 1725 } else { 1726 wpa_dbg(wpa_s, MSG_DEBUG, 1727 "Starting sched scan after %u seconds (no timeout)", 1728 params.sched_scan_start_delay); 1729 } 1730 1731 wpa_setband_scan_freqs(wpa_s, scan_params); 1732 1733 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) && 1734 wpa_s->wpa_state <= WPA_SCANNING) 1735 wpa_setup_mac_addr_rand_params(¶ms, 1736 wpa_s->mac_addr_sched_scan); 1737 1738 wpa_scan_set_relative_rssi_params(wpa_s, scan_params); 1739 1740 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params); 1741 wpabuf_free(extra_ie); 1742 os_free(params.filter_ssids); 1743 os_free(params.mac_addr); 1744 if (ret) { 1745 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); 1746 if (prev_state != wpa_s->wpa_state) 1747 wpa_supplicant_set_state(wpa_s, prev_state); 1748 return ret; 1749 } 1750 1751 /* If we have more SSIDs to scan, add a timeout so we scan them too */ 1752 if (ssid || !wpa_s->first_sched_scan) { 1753 wpa_s->sched_scan_timed_out = 0; 1754 eloop_register_timeout(wpa_s->sched_scan_timeout, 0, 1755 wpa_supplicant_sched_scan_timeout, 1756 wpa_s, NULL); 1757 wpa_s->first_sched_scan = 0; 1758 wpa_s->sched_scan_timeout /= 2; 1759 params.sched_scan_plans[0].interval *= 2; 1760 if ((unsigned int) wpa_s->sched_scan_timeout < 1761 params.sched_scan_plans[0].interval || 1762 params.sched_scan_plans[0].interval > 1763 wpa_s->max_sched_scan_plan_interval) { 1764 params.sched_scan_plans[0].interval = 10; 1765 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; 1766 } 1767 } 1768 1769 /* If there is no more ssids, start next time from the beginning */ 1770 if (!ssid) 1771 wpa_s->prev_sched_ssid = NULL; 1772 1773 return 0; 1774 } 1775 1776 1777 /** 1778 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request 1779 * @wpa_s: Pointer to wpa_supplicant data 1780 * 1781 * This function is used to cancel a scan request scheduled with 1782 * wpa_supplicant_req_scan(). 1783 */ 1784 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) 1785 { 1786 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); 1787 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); 1788 } 1789 1790 1791 /** 1792 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan 1793 * @wpa_s: Pointer to wpa_supplicant data 1794 * 1795 * This function is used to stop a delayed scheduled scan. 1796 */ 1797 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s) 1798 { 1799 if (!wpa_s->sched_scan_supported) 1800 return; 1801 1802 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan"); 1803 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout, 1804 wpa_s, NULL); 1805 } 1806 1807 1808 /** 1809 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans 1810 * @wpa_s: Pointer to wpa_supplicant data 1811 * 1812 * This function is used to stop a periodic scheduled scan. 1813 */ 1814 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) 1815 { 1816 if (!wpa_s->sched_scanning) 1817 return; 1818 1819 if (wpa_s->sched_scanning) 1820 wpa_s->sched_scan_stop_req = 1; 1821 1822 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); 1823 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); 1824 wpa_supplicant_stop_sched_scan(wpa_s); 1825 } 1826 1827 1828 /** 1829 * wpa_supplicant_notify_scanning - Indicate possible scan state change 1830 * @wpa_s: Pointer to wpa_supplicant data 1831 * @scanning: Whether scanning is currently in progress 1832 * 1833 * This function is to generate scanning notifycations. It is called whenever 1834 * there may have been a change in scanning (scan started, completed, stopped). 1835 * wpas_notify_scanning() is called whenever the scanning state changed from the 1836 * previously notified state. 1837 */ 1838 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, 1839 int scanning) 1840 { 1841 if (wpa_s->scanning != scanning) { 1842 wpa_s->scanning = scanning; 1843 wpas_notify_scanning(wpa_s); 1844 } 1845 } 1846 1847 1848 static int wpa_scan_get_max_rate(const struct wpa_scan_res *res) 1849 { 1850 int rate = 0; 1851 const u8 *ie; 1852 int i; 1853 1854 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); 1855 for (i = 0; ie && i < ie[1]; i++) { 1856 if ((ie[i + 2] & 0x7f) > rate) 1857 rate = ie[i + 2] & 0x7f; 1858 } 1859 1860 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); 1861 for (i = 0; ie && i < ie[1]; i++) { 1862 if ((ie[i + 2] & 0x7f) > rate) 1863 rate = ie[i + 2] & 0x7f; 1864 } 1865 1866 return rate; 1867 } 1868 1869 1870 /** 1871 * wpa_scan_get_ie - Fetch a specified information element from a scan result 1872 * @res: Scan result entry 1873 * @ie: Information element identitifier (WLAN_EID_*) 1874 * Returns: Pointer to the information element (id field) or %NULL if not found 1875 * 1876 * This function returns the first matching information element in the scan 1877 * result. 1878 */ 1879 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) 1880 { 1881 size_t ie_len = res->ie_len; 1882 1883 /* Use the Beacon frame IEs if res->ie_len is not available */ 1884 if (!ie_len) 1885 ie_len = res->beacon_ie_len; 1886 1887 return get_ie((const u8 *) (res + 1), ie_len, ie); 1888 } 1889 1890 1891 /** 1892 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result 1893 * @res: Scan result entry 1894 * @vendor_type: Vendor type (four octets starting the IE payload) 1895 * Returns: Pointer to the information element (id field) or %NULL if not found 1896 * 1897 * This function returns the first matching information element in the scan 1898 * result. 1899 */ 1900 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, 1901 u32 vendor_type) 1902 { 1903 const u8 *ies; 1904 const struct element *elem; 1905 1906 ies = (const u8 *) (res + 1); 1907 1908 for_each_element_id(elem, WLAN_EID_VENDOR_SPECIFIC, ies, res->ie_len) { 1909 if (elem->datalen >= 4 && 1910 vendor_type == WPA_GET_BE32(elem->data)) 1911 return &elem->id; 1912 } 1913 1914 return NULL; 1915 } 1916 1917 1918 /** 1919 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result 1920 * @res: Scan result entry 1921 * @vendor_type: Vendor type (four octets starting the IE payload) 1922 * Returns: Pointer to the information element (id field) or %NULL if not found 1923 * 1924 * This function returns the first matching information element in the scan 1925 * result. 1926 * 1927 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only 1928 * from Beacon frames instead of either Beacon or Probe Response frames. 1929 */ 1930 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, 1931 u32 vendor_type) 1932 { 1933 const u8 *ies; 1934 const struct element *elem; 1935 1936 if (res->beacon_ie_len == 0) 1937 return NULL; 1938 1939 ies = (const u8 *) (res + 1); 1940 ies += res->ie_len; 1941 1942 for_each_element_id(elem, WLAN_EID_VENDOR_SPECIFIC, ies, 1943 res->beacon_ie_len) { 1944 if (elem->datalen >= 4 && 1945 vendor_type == WPA_GET_BE32(elem->data)) 1946 return &elem->id; 1947 } 1948 1949 return NULL; 1950 } 1951 1952 1953 /** 1954 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result 1955 * @res: Scan result entry 1956 * @vendor_type: Vendor type (four octets starting the IE payload) 1957 * Returns: Pointer to the information element payload or %NULL if not found 1958 * 1959 * This function returns concatenated payload of possibly fragmented vendor 1960 * specific information elements in the scan result. The caller is responsible 1961 * for freeing the returned buffer. 1962 */ 1963 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, 1964 u32 vendor_type) 1965 { 1966 struct wpabuf *buf; 1967 const u8 *end, *pos; 1968 1969 buf = wpabuf_alloc(res->ie_len); 1970 if (buf == NULL) 1971 return NULL; 1972 1973 pos = (const u8 *) (res + 1); 1974 end = pos + res->ie_len; 1975 1976 while (end - pos > 1) { 1977 u8 ie, len; 1978 1979 ie = pos[0]; 1980 len = pos[1]; 1981 if (len > end - pos - 2) 1982 break; 1983 pos += 2; 1984 if (ie == WLAN_EID_VENDOR_SPECIFIC && len >= 4 && 1985 vendor_type == WPA_GET_BE32(pos)) 1986 wpabuf_put_data(buf, pos + 4, len - 4); 1987 pos += len; 1988 } 1989 1990 if (wpabuf_len(buf) == 0) { 1991 wpabuf_free(buf); 1992 buf = NULL; 1993 } 1994 1995 return buf; 1996 } 1997 1998 1999 /* Compare function for sorting scan results. Return >0 if @b is considered 2000 * better. */ 2001 static int wpa_scan_result_compar(const void *a, const void *b) 2002 { 2003 #define MIN(a,b) a < b ? a : b 2004 struct wpa_scan_res **_wa = (void *) a; 2005 struct wpa_scan_res **_wb = (void *) b; 2006 struct wpa_scan_res *wa = *_wa; 2007 struct wpa_scan_res *wb = *_wb; 2008 int wpa_a, wpa_b; 2009 int snr_a, snr_b, snr_a_full, snr_b_full; 2010 2011 /* WPA/WPA2 support preferred */ 2012 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || 2013 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; 2014 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || 2015 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; 2016 2017 if (wpa_b && !wpa_a) 2018 return 1; 2019 if (!wpa_b && wpa_a) 2020 return -1; 2021 2022 /* privacy support preferred */ 2023 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && 2024 (wb->caps & IEEE80211_CAP_PRIVACY)) 2025 return 1; 2026 if ((wa->caps & IEEE80211_CAP_PRIVACY) && 2027 (wb->caps & IEEE80211_CAP_PRIVACY) == 0) 2028 return -1; 2029 2030 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) { 2031 snr_a_full = wa->snr; 2032 snr_a = MIN(wa->snr, GREAT_SNR); 2033 snr_b_full = wb->snr; 2034 snr_b = MIN(wb->snr, GREAT_SNR); 2035 } else { 2036 /* Level is not in dBm, so we can't calculate 2037 * SNR. Just use raw level (units unknown). */ 2038 snr_a = snr_a_full = wa->level; 2039 snr_b = snr_b_full = wb->level; 2040 } 2041 2042 /* If SNR is close, decide by max rate or frequency band. For cases 2043 * involving the 6 GHz band, use the throughput estimate irrespective 2044 * of the SNR difference since the LPI/VLP rules may result in 2045 * significant differences in SNR for cases where the estimated 2046 * throughput can be considerably higher with the lower SNR. */ 2047 if (snr_a && snr_b && (abs(snr_b - snr_a) < 7 || 2048 is_6ghz_freq(wa->freq) || 2049 is_6ghz_freq(wb->freq))) { 2050 if (wa->est_throughput != wb->est_throughput) 2051 return (int) wb->est_throughput - 2052 (int) wa->est_throughput; 2053 } 2054 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) || 2055 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { 2056 if (is_6ghz_freq(wa->freq) ^ is_6ghz_freq(wb->freq)) 2057 return is_6ghz_freq(wa->freq) ? -1 : 1; 2058 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq)) 2059 return IS_5GHZ(wa->freq) ? -1 : 1; 2060 } 2061 2062 /* all things being equal, use SNR; if SNRs are 2063 * identical, use quality values since some drivers may only report 2064 * that value and leave the signal level zero */ 2065 if (snr_b_full == snr_a_full) 2066 return wb->qual - wa->qual; 2067 return snr_b_full - snr_a_full; 2068 #undef MIN 2069 } 2070 2071 2072 #ifdef CONFIG_WPS 2073 /* Compare function for sorting scan results when searching a WPS AP for 2074 * provisioning. Return >0 if @b is considered better. */ 2075 static int wpa_scan_result_wps_compar(const void *a, const void *b) 2076 { 2077 struct wpa_scan_res **_wa = (void *) a; 2078 struct wpa_scan_res **_wb = (void *) b; 2079 struct wpa_scan_res *wa = *_wa; 2080 struct wpa_scan_res *wb = *_wb; 2081 int uses_wps_a, uses_wps_b; 2082 struct wpabuf *wps_a, *wps_b; 2083 int res; 2084 2085 /* Optimization - check WPS IE existence before allocated memory and 2086 * doing full reassembly. */ 2087 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; 2088 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; 2089 if (uses_wps_a && !uses_wps_b) 2090 return -1; 2091 if (!uses_wps_a && uses_wps_b) 2092 return 1; 2093 2094 if (uses_wps_a && uses_wps_b) { 2095 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); 2096 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); 2097 res = wps_ap_priority_compar(wps_a, wps_b); 2098 wpabuf_free(wps_a); 2099 wpabuf_free(wps_b); 2100 if (res) 2101 return res; 2102 } 2103 2104 /* 2105 * Do not use current AP security policy as a sorting criteria during 2106 * WPS provisioning step since the AP may get reconfigured at the 2107 * completion of provisioning. 2108 */ 2109 2110 /* all things being equal, use signal level; if signal levels are 2111 * identical, use quality values since some drivers may only report 2112 * that value and leave the signal level zero */ 2113 if (wb->level == wa->level) 2114 return wb->qual - wa->qual; 2115 return wb->level - wa->level; 2116 } 2117 #endif /* CONFIG_WPS */ 2118 2119 2120 static void dump_scan_res(struct wpa_scan_results *scan_res) 2121 { 2122 #ifndef CONFIG_NO_STDOUT_DEBUG 2123 size_t i; 2124 2125 if (scan_res->res == NULL || scan_res->num == 0) 2126 return; 2127 2128 wpa_printf(MSG_EXCESSIVE, "Sorted scan results"); 2129 2130 for (i = 0; i < scan_res->num; i++) { 2131 struct wpa_scan_res *r = scan_res->res[i]; 2132 u8 *pos; 2133 if (r->flags & WPA_SCAN_LEVEL_DBM) { 2134 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID); 2135 2136 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " 2137 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u", 2138 MAC2STR(r->bssid), r->freq, r->qual, 2139 r->noise, noise_valid ? "" : "~", r->level, 2140 r->snr, r->snr >= GREAT_SNR ? "*" : "", 2141 r->flags, 2142 r->age, r->est_throughput); 2143 } else { 2144 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " 2145 "noise=%d level=%d flags=0x%x age=%u est=%u", 2146 MAC2STR(r->bssid), r->freq, r->qual, 2147 r->noise, r->level, r->flags, r->age, 2148 r->est_throughput); 2149 } 2150 pos = (u8 *) (r + 1); 2151 if (r->ie_len) 2152 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len); 2153 pos += r->ie_len; 2154 if (r->beacon_ie_len) 2155 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs", 2156 pos, r->beacon_ie_len); 2157 } 2158 #endif /* CONFIG_NO_STDOUT_DEBUG */ 2159 } 2160 2161 2162 /** 2163 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed 2164 * @wpa_s: Pointer to wpa_supplicant data 2165 * @bssid: BSSID to check 2166 * Returns: 0 if the BSSID is filtered or 1 if not 2167 * 2168 * This function is used to filter out specific BSSIDs from scan reslts mainly 2169 * for testing purposes (SET bssid_filter ctrl_iface command). 2170 */ 2171 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, 2172 const u8 *bssid) 2173 { 2174 size_t i; 2175 2176 if (wpa_s->bssid_filter == NULL) 2177 return 1; 2178 2179 for (i = 0; i < wpa_s->bssid_filter_count; i++) { 2180 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid, 2181 ETH_ALEN) == 0) 2182 return 1; 2183 } 2184 2185 return 0; 2186 } 2187 2188 2189 void filter_scan_res(struct wpa_supplicant *wpa_s, 2190 struct wpa_scan_results *res) 2191 { 2192 size_t i, j; 2193 2194 if (wpa_s->bssid_filter == NULL) 2195 return; 2196 2197 for (i = 0, j = 0; i < res->num; i++) { 2198 if (wpa_supplicant_filter_bssid_match(wpa_s, 2199 res->res[i]->bssid)) { 2200 res->res[j++] = res->res[i]; 2201 } else { 2202 os_free(res->res[i]); 2203 res->res[i] = NULL; 2204 } 2205 } 2206 2207 if (res->num != j) { 2208 wpa_printf(MSG_DEBUG, "Filtered out %d scan results", 2209 (int) (res->num - j)); 2210 res->num = j; 2211 } 2212 } 2213 2214 2215 void scan_snr(struct wpa_scan_res *res) 2216 { 2217 if (res->flags & WPA_SCAN_NOISE_INVALID) { 2218 res->noise = is_6ghz_freq(res->freq) ? 2219 DEFAULT_NOISE_FLOOR_6GHZ : 2220 (IS_5GHZ(res->freq) ? 2221 DEFAULT_NOISE_FLOOR_5GHZ : DEFAULT_NOISE_FLOOR_2GHZ); 2222 } 2223 2224 if (res->flags & WPA_SCAN_LEVEL_DBM) { 2225 res->snr = res->level - res->noise; 2226 } else { 2227 /* Level is not in dBm, so we can't calculate 2228 * SNR. Just use raw level (units unknown). */ 2229 res->snr = res->level; 2230 } 2231 } 2232 2233 2234 /* Minimum SNR required to achieve a certain bitrate. */ 2235 struct minsnr_bitrate_entry { 2236 int minsnr; 2237 unsigned int bitrate; /* in Mbps */ 2238 }; 2239 2240 /* VHT needs to be enabled in order to achieve MCS8 and MCS9 rates. */ 2241 static const int vht_mcs = 8; 2242 2243 static const struct minsnr_bitrate_entry vht20_table[] = { 2244 { 0, 0 }, 2245 { 2, 6500 }, /* HT20 MCS0 */ 2246 { 5, 13000 }, /* HT20 MCS1 */ 2247 { 9, 19500 }, /* HT20 MCS2 */ 2248 { 11, 26000 }, /* HT20 MCS3 */ 2249 { 15, 39000 }, /* HT20 MCS4 */ 2250 { 18, 52000 }, /* HT20 MCS5 */ 2251 { 20, 58500 }, /* HT20 MCS6 */ 2252 { 25, 65000 }, /* HT20 MCS7 */ 2253 { 29, 78000 }, /* VHT20 MCS8 */ 2254 { -1, 78000 } /* SNR > 29 */ 2255 }; 2256 2257 static const struct minsnr_bitrate_entry vht40_table[] = { 2258 { 0, 0 }, 2259 { 5, 13500 }, /* HT40 MCS0 */ 2260 { 8, 27000 }, /* HT40 MCS1 */ 2261 { 12, 40500 }, /* HT40 MCS2 */ 2262 { 14, 54000 }, /* HT40 MCS3 */ 2263 { 18, 81000 }, /* HT40 MCS4 */ 2264 { 21, 108000 }, /* HT40 MCS5 */ 2265 { 23, 121500 }, /* HT40 MCS6 */ 2266 { 28, 135000 }, /* HT40 MCS7 */ 2267 { 32, 162000 }, /* VHT40 MCS8 */ 2268 { 34, 180000 }, /* VHT40 MCS9 */ 2269 { -1, 180000 } /* SNR > 34 */ 2270 }; 2271 2272 static const struct minsnr_bitrate_entry vht80_table[] = { 2273 { 0, 0 }, 2274 { 8, 29300 }, /* VHT80 MCS0 */ 2275 { 11, 58500 }, /* VHT80 MCS1 */ 2276 { 15, 87800 }, /* VHT80 MCS2 */ 2277 { 17, 117000 }, /* VHT80 MCS3 */ 2278 { 21, 175500 }, /* VHT80 MCS4 */ 2279 { 24, 234000 }, /* VHT80 MCS5 */ 2280 { 26, 263300 }, /* VHT80 MCS6 */ 2281 { 31, 292500 }, /* VHT80 MCS7 */ 2282 { 35, 351000 }, /* VHT80 MCS8 */ 2283 { 37, 390000 }, /* VHT80 MCS9 */ 2284 { -1, 390000 } /* SNR > 37 */ 2285 }; 2286 2287 2288 static const struct minsnr_bitrate_entry vht160_table[] = { 2289 { 0, 0 }, 2290 { 11, 58500 }, /* VHT160 MCS0 */ 2291 { 14, 117000 }, /* VHT160 MCS1 */ 2292 { 18, 175500 }, /* VHT160 MCS2 */ 2293 { 20, 234000 }, /* VHT160 MCS3 */ 2294 { 24, 351000 }, /* VHT160 MCS4 */ 2295 { 27, 468000 }, /* VHT160 MCS5 */ 2296 { 29, 526500 }, /* VHT160 MCS6 */ 2297 { 34, 585000 }, /* VHT160 MCS7 */ 2298 { 38, 702000 }, /* VHT160 MCS8 */ 2299 { 40, 780000 }, /* VHT160 MCS9 */ 2300 { -1, 780000 } /* SNR > 37 */ 2301 }; 2302 2303 2304 static const struct minsnr_bitrate_entry he20_table[] = { 2305 { 0, 0 }, 2306 { 2, 8600 }, /* HE20 MCS0 */ 2307 { 5, 17200 }, /* HE20 MCS1 */ 2308 { 9, 25800 }, /* HE20 MCS2 */ 2309 { 11, 34400 }, /* HE20 MCS3 */ 2310 { 15, 51600 }, /* HE20 MCS4 */ 2311 { 18, 68800 }, /* HE20 MCS5 */ 2312 { 20, 77400 }, /* HE20 MCS6 */ 2313 { 25, 86000 }, /* HE20 MCS7 */ 2314 { 29, 103200 }, /* HE20 MCS8 */ 2315 { 31, 114700 }, /* HE20 MCS9 */ 2316 { 34, 129000 }, /* HE20 MCS10 */ 2317 { 36, 143400 }, /* HE20 MCS11 */ 2318 { -1, 143400 } /* SNR > 29 */ 2319 }; 2320 2321 static const struct minsnr_bitrate_entry he40_table[] = { 2322 { 0, 0 }, 2323 { 5, 17200 }, /* HE40 MCS0 */ 2324 { 8, 34400 }, /* HE40 MCS1 */ 2325 { 12, 51600 }, /* HE40 MCS2 */ 2326 { 14, 68800 }, /* HE40 MCS3 */ 2327 { 18, 103200 }, /* HE40 MCS4 */ 2328 { 21, 137600 }, /* HE40 MCS5 */ 2329 { 23, 154900 }, /* HE40 MCS6 */ 2330 { 28, 172100 }, /* HE40 MCS7 */ 2331 { 32, 206500 }, /* HE40 MCS8 */ 2332 { 34, 229400 }, /* HE40 MCS9 */ 2333 { 37, 258100 }, /* HE40 MCS10 */ 2334 { 39, 286800 }, /* HE40 MCS11 */ 2335 { -1, 286800 } /* SNR > 34 */ 2336 }; 2337 2338 static const struct minsnr_bitrate_entry he80_table[] = { 2339 { 0, 0 }, 2340 { 8, 36000 }, /* HE80 MCS0 */ 2341 { 11, 72100 }, /* HE80 MCS1 */ 2342 { 15, 108100 }, /* HE80 MCS2 */ 2343 { 17, 144100 }, /* HE80 MCS3 */ 2344 { 21, 216200 }, /* HE80 MCS4 */ 2345 { 24, 288200 }, /* HE80 MCS5 */ 2346 { 26, 324300 }, /* HE80 MCS6 */ 2347 { 31, 360300 }, /* HE80 MCS7 */ 2348 { 35, 432400 }, /* HE80 MCS8 */ 2349 { 37, 480400 }, /* HE80 MCS9 */ 2350 { 40, 540400 }, /* HE80 MCS10 */ 2351 { 42, 600500 }, /* HE80 MCS11 */ 2352 { -1, 600500 } /* SNR > 37 */ 2353 }; 2354 2355 2356 static const struct minsnr_bitrate_entry he160_table[] = { 2357 { 0, 0 }, 2358 { 11, 72100 }, /* HE160 MCS0 */ 2359 { 14, 144100 }, /* HE160 MCS1 */ 2360 { 18, 216200 }, /* HE160 MCS2 */ 2361 { 20, 288200 }, /* HE160 MCS3 */ 2362 { 24, 432400 }, /* HE160 MCS4 */ 2363 { 27, 576500 }, /* HE160 MCS5 */ 2364 { 29, 648500 }, /* HE160 MCS6 */ 2365 { 34, 720600 }, /* HE160 MCS7 */ 2366 { 38, 864700 }, /* HE160 MCS8 */ 2367 { 40, 960800 }, /* HE160 MCS9 */ 2368 { 43, 1080900 }, /* HE160 MCS10 */ 2369 { 45, 1201000 }, /* HE160 MCS11 */ 2370 { -1, 1201000 } /* SNR > 37 */ 2371 }; 2372 2373 2374 static unsigned int interpolate_rate(int snr, int snr0, int snr1, 2375 int rate0, int rate1) 2376 { 2377 return rate0 + (snr - snr0) * (rate1 - rate0) / (snr1 - snr0); 2378 } 2379 2380 2381 static unsigned int max_rate(const struct minsnr_bitrate_entry table[], 2382 int snr, bool vht) 2383 { 2384 const struct minsnr_bitrate_entry *prev, *entry = table; 2385 2386 while ((entry->minsnr != -1) && 2387 (snr >= entry->minsnr) && 2388 (vht || entry - table <= vht_mcs)) 2389 entry++; 2390 if (entry == table) 2391 return entry->bitrate; 2392 prev = entry - 1; 2393 if (entry->minsnr == -1 || (!vht && entry - table > vht_mcs)) 2394 return prev->bitrate; 2395 return interpolate_rate(snr, prev->minsnr, entry->minsnr, prev->bitrate, 2396 entry->bitrate); 2397 } 2398 2399 2400 static unsigned int max_ht20_rate(int snr, bool vht) 2401 { 2402 return max_rate(vht20_table, snr, vht); 2403 } 2404 2405 2406 static unsigned int max_ht40_rate(int snr, bool vht) 2407 { 2408 return max_rate(vht40_table, snr, vht); 2409 } 2410 2411 2412 static unsigned int max_vht80_rate(int snr) 2413 { 2414 return max_rate(vht80_table, snr, 1); 2415 } 2416 2417 2418 static unsigned int max_vht160_rate(int snr) 2419 { 2420 return max_rate(vht160_table, snr, 1); 2421 } 2422 2423 2424 static unsigned int max_he_rate(const struct minsnr_bitrate_entry table[], 2425 int snr) 2426 { 2427 const struct minsnr_bitrate_entry *prev, *entry = table; 2428 2429 while (entry->minsnr != -1 && snr >= entry->minsnr) 2430 entry++; 2431 if (entry == table) 2432 return 0; 2433 prev = entry - 1; 2434 if (entry->minsnr == -1) 2435 return prev->bitrate; 2436 return interpolate_rate(snr, prev->minsnr, entry->minsnr, 2437 prev->bitrate, entry->bitrate); 2438 } 2439 2440 2441 unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s, 2442 const u8 *ies, size_t ies_len, int rate, 2443 int snr, int freq) 2444 { 2445 struct hostapd_hw_modes *hw_mode; 2446 unsigned int est, tmp; 2447 const u8 *ie; 2448 2449 /* Limit based on estimated SNR */ 2450 if (rate > 1 * 2 && snr < 1) 2451 rate = 1 * 2; 2452 else if (rate > 2 * 2 && snr < 4) 2453 rate = 2 * 2; 2454 else if (rate > 6 * 2 && snr < 5) 2455 rate = 6 * 2; 2456 else if (rate > 9 * 2 && snr < 6) 2457 rate = 9 * 2; 2458 else if (rate > 12 * 2 && snr < 7) 2459 rate = 12 * 2; 2460 else if (rate > 12 * 2 && snr < 8) 2461 rate = 14 * 2; 2462 else if (rate > 12 * 2 && snr < 9) 2463 rate = 16 * 2; 2464 else if (rate > 18 * 2 && snr < 10) 2465 rate = 18 * 2; 2466 else if (rate > 24 * 2 && snr < 11) 2467 rate = 24 * 2; 2468 else if (rate > 24 * 2 && snr < 12) 2469 rate = 27 * 2; 2470 else if (rate > 24 * 2 && snr < 13) 2471 rate = 30 * 2; 2472 else if (rate > 24 * 2 && snr < 14) 2473 rate = 33 * 2; 2474 else if (rate > 36 * 2 && snr < 15) 2475 rate = 36 * 2; 2476 else if (rate > 36 * 2 && snr < 16) 2477 rate = 39 * 2; 2478 else if (rate > 36 * 2 && snr < 17) 2479 rate = 42 * 2; 2480 else if (rate > 36 * 2 && snr < 18) 2481 rate = 45 * 2; 2482 else if (rate > 48 * 2 && snr < 19) 2483 rate = 48 * 2; 2484 else if (rate > 48 * 2 && snr < 20) 2485 rate = 51 * 2; 2486 else if (rate > 54 * 2 && snr < 21) 2487 rate = 54 * 2; 2488 est = rate * 500; 2489 2490 hw_mode = get_mode_with_freq(wpa_s->hw.modes, wpa_s->hw.num_modes, 2491 freq); 2492 2493 if (hw_mode && hw_mode->ht_capab) { 2494 ie = get_ie(ies, ies_len, WLAN_EID_HT_CAP); 2495 if (ie) { 2496 tmp = max_ht20_rate(snr, false); 2497 if (tmp > est) 2498 est = tmp; 2499 } 2500 } 2501 2502 if (hw_mode && 2503 (hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) { 2504 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION); 2505 if (ie && ie[1] >= 2 && 2506 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { 2507 tmp = max_ht40_rate(snr, false); 2508 if (tmp > est) 2509 est = tmp; 2510 } 2511 } 2512 2513 if (hw_mode && hw_mode->vht_capab) { 2514 /* Use +1 to assume VHT is always faster than HT */ 2515 ie = get_ie(ies, ies_len, WLAN_EID_VHT_CAP); 2516 if (ie) { 2517 bool vht80 = false, vht160 = false; 2518 2519 tmp = max_ht20_rate(snr, true) + 1; 2520 if (tmp > est) 2521 est = tmp; 2522 2523 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION); 2524 if (ie && ie[1] >= 2 && 2525 (ie[3] & 2526 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { 2527 tmp = max_ht40_rate(snr, true) + 1; 2528 if (tmp > est) 2529 est = tmp; 2530 } 2531 2532 /* Determine VHT BSS bandwidth based on IEEE Std 2533 * 802.11-2020, Table 11-23 (VHT BSs bandwidth) */ 2534 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION); 2535 if (ie && ie[1] >= 3) { 2536 u8 cw = ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK; 2537 u8 seg0 = ie[3]; 2538 u8 seg1 = ie[4]; 2539 2540 if (cw) 2541 vht80 = true; 2542 if (cw == 2 || 2543 (cw == 3 && 2544 (seg1 > 0 && abs(seg1 - seg0) == 16))) 2545 vht160 = true; 2546 if (cw == 1 && 2547 ((seg1 > 0 && abs(seg1 - seg0) == 8) || 2548 (seg1 > 0 && abs(seg1 - seg0) == 16))) 2549 vht160 = true; 2550 } 2551 2552 if (vht80) { 2553 tmp = max_vht80_rate(snr) + 1; 2554 if (tmp > est) 2555 est = tmp; 2556 } 2557 2558 if (vht160 && 2559 (hw_mode->vht_capab & 2560 (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 2561 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 2562 tmp = max_vht160_rate(snr) + 1; 2563 if (tmp > est) 2564 est = tmp; 2565 } 2566 } 2567 } 2568 2569 if (hw_mode && hw_mode->he_capab[IEEE80211_MODE_INFRA].he_supported) { 2570 /* Use +2 to assume HE is always faster than HT/VHT */ 2571 struct ieee80211_he_capabilities *he; 2572 struct he_capabilities *own_he; 2573 u8 cw; 2574 2575 ie = get_ie_ext(ies, ies_len, WLAN_EID_EXT_HE_CAPABILITIES); 2576 if (!ie || (ie[1] < 1 + IEEE80211_HE_CAPAB_MIN_LEN)) 2577 return est; 2578 he = (struct ieee80211_he_capabilities *) &ie[3]; 2579 own_he = &hw_mode->he_capab[IEEE80211_MODE_INFRA]; 2580 2581 tmp = max_he_rate(he20_table, snr) + 2; 2582 if (tmp > est) 2583 est = tmp; 2584 2585 cw = he->he_phy_capab_info[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 2586 own_he->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX]; 2587 if (cw & 2588 (IS_2P4GHZ(freq) ? HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G : 2589 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 2590 tmp = max_he_rate(he40_table, snr) + 2; 2591 if (tmp > est) 2592 est = tmp; 2593 } 2594 2595 if (!IS_2P4GHZ(freq) && 2596 (cw & HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 2597 tmp = max_he_rate(he80_table, snr) + 2; 2598 if (tmp > est) 2599 est = tmp; 2600 } 2601 2602 if (!IS_2P4GHZ(freq) && 2603 (cw & (HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 2604 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G))) { 2605 tmp = max_he_rate(he160_table, snr) + 2; 2606 if (tmp > est) 2607 est = tmp; 2608 } 2609 } 2610 2611 return est; 2612 } 2613 2614 2615 void scan_est_throughput(struct wpa_supplicant *wpa_s, 2616 struct wpa_scan_res *res) 2617 { 2618 int rate; /* max legacy rate in 500 kb/s units */ 2619 int snr = res->snr; 2620 const u8 *ies = (const void *) (res + 1); 2621 size_t ie_len = res->ie_len; 2622 2623 if (res->est_throughput) 2624 return; 2625 2626 /* Get maximum legacy rate */ 2627 rate = wpa_scan_get_max_rate(res); 2628 2629 if (!ie_len) 2630 ie_len = res->beacon_ie_len; 2631 res->est_throughput = 2632 wpas_get_est_tpt(wpa_s, ies, ie_len, rate, snr, res->freq); 2633 2634 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */ 2635 } 2636 2637 2638 /** 2639 * wpa_supplicant_get_scan_results - Get scan results 2640 * @wpa_s: Pointer to wpa_supplicant data 2641 * @info: Information about what was scanned or %NULL if not available 2642 * @new_scan: Whether a new scan was performed 2643 * Returns: Scan results, %NULL on failure 2644 * 2645 * This function request the current scan results from the driver and updates 2646 * the local BSS list wpa_s->bss. The caller is responsible for freeing the 2647 * results with wpa_scan_results_free(). 2648 */ 2649 struct wpa_scan_results * 2650 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, 2651 struct scan_info *info, int new_scan) 2652 { 2653 struct wpa_scan_results *scan_res; 2654 size_t i; 2655 int (*compar)(const void *, const void *) = wpa_scan_result_compar; 2656 2657 scan_res = wpa_drv_get_scan_results2(wpa_s); 2658 if (scan_res == NULL) { 2659 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); 2660 return NULL; 2661 } 2662 if (scan_res->fetch_time.sec == 0) { 2663 /* 2664 * Make sure we have a valid timestamp if the driver wrapper 2665 * does not set this. 2666 */ 2667 os_get_reltime(&scan_res->fetch_time); 2668 } 2669 filter_scan_res(wpa_s, scan_res); 2670 2671 for (i = 0; i < scan_res->num; i++) { 2672 struct wpa_scan_res *scan_res_item = scan_res->res[i]; 2673 2674 scan_snr(scan_res_item); 2675 scan_est_throughput(wpa_s, scan_res_item); 2676 } 2677 2678 #ifdef CONFIG_WPS 2679 if (wpas_wps_searching(wpa_s)) { 2680 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " 2681 "provisioning rules"); 2682 compar = wpa_scan_result_wps_compar; 2683 } 2684 #endif /* CONFIG_WPS */ 2685 2686 if (scan_res->res) { 2687 qsort(scan_res->res, scan_res->num, 2688 sizeof(struct wpa_scan_res *), compar); 2689 } 2690 dump_scan_res(scan_res); 2691 2692 if (wpa_s->ignore_post_flush_scan_res) { 2693 /* FLUSH command aborted an ongoing scan and these are the 2694 * results from the aborted scan. Do not process the results to 2695 * maintain flushed state. */ 2696 wpa_dbg(wpa_s, MSG_DEBUG, 2697 "Do not update BSS table based on pending post-FLUSH scan results"); 2698 wpa_s->ignore_post_flush_scan_res = 0; 2699 return scan_res; 2700 } 2701 2702 wpa_bss_update_start(wpa_s); 2703 for (i = 0; i < scan_res->num; i++) 2704 wpa_bss_update_scan_res(wpa_s, scan_res->res[i], 2705 &scan_res->fetch_time); 2706 wpa_bss_update_end(wpa_s, info, new_scan); 2707 2708 return scan_res; 2709 } 2710 2711 2712 /** 2713 * wpa_supplicant_update_scan_results - Update scan results from the driver 2714 * @wpa_s: Pointer to wpa_supplicant data 2715 * Returns: 0 on success, -1 on failure 2716 * 2717 * This function updates the BSS table within wpa_supplicant based on the 2718 * currently available scan results from the driver without requesting a new 2719 * scan. This is used in cases where the driver indicates an association 2720 * (including roaming within ESS) and wpa_supplicant does not yet have the 2721 * needed information to complete the connection (e.g., to perform validation 2722 * steps in 4-way handshake). 2723 */ 2724 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) 2725 { 2726 struct wpa_scan_results *scan_res; 2727 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); 2728 if (scan_res == NULL) 2729 return -1; 2730 wpa_scan_results_free(scan_res); 2731 2732 return 0; 2733 } 2734 2735 2736 /** 2737 * scan_only_handler - Reports scan results 2738 */ 2739 void scan_only_handler(struct wpa_supplicant *wpa_s, 2740 struct wpa_scan_results *scan_res) 2741 { 2742 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received"); 2743 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 2744 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) { 2745 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u", 2746 wpa_s->manual_scan_id); 2747 wpa_s->manual_scan_use_id = 0; 2748 } else { 2749 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS); 2750 } 2751 wpas_notify_scan_results(wpa_s); 2752 wpas_notify_scan_done(wpa_s, 1); 2753 if (wpa_s->scan_work) { 2754 struct wpa_radio_work *work = wpa_s->scan_work; 2755 wpa_s->scan_work = NULL; 2756 radio_work_done(work); 2757 } 2758 2759 if (wpa_s->wpa_state == WPA_SCANNING) 2760 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state); 2761 } 2762 2763 2764 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s) 2765 { 2766 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL); 2767 } 2768 2769 2770 struct wpa_driver_scan_params * 2771 wpa_scan_clone_params(const struct wpa_driver_scan_params *src) 2772 { 2773 struct wpa_driver_scan_params *params; 2774 size_t i; 2775 u8 *n; 2776 2777 params = os_zalloc(sizeof(*params)); 2778 if (params == NULL) 2779 return NULL; 2780 2781 for (i = 0; i < src->num_ssids; i++) { 2782 if (src->ssids[i].ssid) { 2783 n = os_memdup(src->ssids[i].ssid, 2784 src->ssids[i].ssid_len); 2785 if (n == NULL) 2786 goto failed; 2787 params->ssids[i].ssid = n; 2788 params->ssids[i].ssid_len = src->ssids[i].ssid_len; 2789 } 2790 } 2791 params->num_ssids = src->num_ssids; 2792 2793 if (src->extra_ies) { 2794 n = os_memdup(src->extra_ies, src->extra_ies_len); 2795 if (n == NULL) 2796 goto failed; 2797 params->extra_ies = n; 2798 params->extra_ies_len = src->extra_ies_len; 2799 } 2800 2801 if (src->freqs) { 2802 int len = int_array_len(src->freqs); 2803 params->freqs = os_memdup(src->freqs, (len + 1) * sizeof(int)); 2804 if (params->freqs == NULL) 2805 goto failed; 2806 } 2807 2808 if (src->filter_ssids) { 2809 params->filter_ssids = os_memdup(src->filter_ssids, 2810 sizeof(*params->filter_ssids) * 2811 src->num_filter_ssids); 2812 if (params->filter_ssids == NULL) 2813 goto failed; 2814 params->num_filter_ssids = src->num_filter_ssids; 2815 } 2816 2817 params->filter_rssi = src->filter_rssi; 2818 params->p2p_probe = src->p2p_probe; 2819 params->only_new_results = src->only_new_results; 2820 params->low_priority = src->low_priority; 2821 params->duration = src->duration; 2822 params->duration_mandatory = src->duration_mandatory; 2823 params->oce_scan = src->oce_scan; 2824 2825 if (src->sched_scan_plans_num > 0) { 2826 params->sched_scan_plans = 2827 os_memdup(src->sched_scan_plans, 2828 sizeof(*src->sched_scan_plans) * 2829 src->sched_scan_plans_num); 2830 if (!params->sched_scan_plans) 2831 goto failed; 2832 2833 params->sched_scan_plans_num = src->sched_scan_plans_num; 2834 } 2835 2836 if (src->mac_addr_rand && 2837 wpa_setup_mac_addr_rand_params(params, src->mac_addr)) 2838 goto failed; 2839 2840 if (src->bssid) { 2841 u8 *bssid; 2842 2843 bssid = os_memdup(src->bssid, ETH_ALEN); 2844 if (!bssid) 2845 goto failed; 2846 params->bssid = bssid; 2847 } 2848 2849 params->relative_rssi_set = src->relative_rssi_set; 2850 params->relative_rssi = src->relative_rssi; 2851 params->relative_adjust_band = src->relative_adjust_band; 2852 params->relative_adjust_rssi = src->relative_adjust_rssi; 2853 params->p2p_include_6ghz = src->p2p_include_6ghz; 2854 return params; 2855 2856 failed: 2857 wpa_scan_free_params(params); 2858 return NULL; 2859 } 2860 2861 2862 void wpa_scan_free_params(struct wpa_driver_scan_params *params) 2863 { 2864 size_t i; 2865 2866 if (params == NULL) 2867 return; 2868 2869 for (i = 0; i < params->num_ssids; i++) 2870 os_free((u8 *) params->ssids[i].ssid); 2871 os_free((u8 *) params->extra_ies); 2872 os_free(params->freqs); 2873 os_free(params->filter_ssids); 2874 os_free(params->sched_scan_plans); 2875 2876 /* 2877 * Note: params->mac_addr_mask points to same memory allocation and 2878 * must not be freed separately. 2879 */ 2880 os_free((u8 *) params->mac_addr); 2881 2882 os_free((u8 *) params->bssid); 2883 2884 os_free(params); 2885 } 2886 2887 2888 int wpas_start_pno(struct wpa_supplicant *wpa_s) 2889 { 2890 int ret; 2891 size_t prio, i, num_ssid, num_match_ssid; 2892 struct wpa_ssid *ssid; 2893 struct wpa_driver_scan_params params; 2894 struct sched_scan_plan scan_plan; 2895 unsigned int max_sched_scan_ssids; 2896 2897 if (!wpa_s->sched_scan_supported) 2898 return -1; 2899 2900 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) 2901 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; 2902 else 2903 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; 2904 if (max_sched_scan_ssids < 1) 2905 return -1; 2906 2907 if (wpa_s->pno || wpa_s->pno_sched_pending) 2908 return 0; 2909 2910 if ((wpa_s->wpa_state > WPA_SCANNING) && 2911 (wpa_s->wpa_state < WPA_COMPLETED)) { 2912 wpa_printf(MSG_ERROR, "PNO: In assoc process"); 2913 return -EAGAIN; 2914 } 2915 2916 if (wpa_s->wpa_state == WPA_SCANNING) { 2917 wpa_supplicant_cancel_scan(wpa_s); 2918 if (wpa_s->sched_scanning) { 2919 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of " 2920 "ongoing sched scan"); 2921 wpa_supplicant_cancel_sched_scan(wpa_s); 2922 wpa_s->pno_sched_pending = 1; 2923 return 0; 2924 } 2925 } 2926 2927 if (wpa_s->sched_scan_stop_req) { 2928 wpa_printf(MSG_DEBUG, 2929 "Schedule PNO after previous sched scan has stopped"); 2930 wpa_s->pno_sched_pending = 1; 2931 return 0; 2932 } 2933 2934 os_memset(¶ms, 0, sizeof(params)); 2935 2936 num_ssid = num_match_ssid = 0; 2937 ssid = wpa_s->conf->ssid; 2938 while (ssid) { 2939 if (!wpas_network_disabled(wpa_s, ssid)) { 2940 num_match_ssid++; 2941 if (ssid->scan_ssid) 2942 num_ssid++; 2943 } 2944 ssid = ssid->next; 2945 } 2946 2947 if (num_match_ssid == 0) { 2948 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs"); 2949 return -1; 2950 } 2951 2952 if (num_match_ssid > num_ssid) { 2953 params.num_ssids++; /* wildcard */ 2954 num_ssid++; 2955 } 2956 2957 if (num_ssid > max_sched_scan_ssids) { 2958 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from " 2959 "%u", max_sched_scan_ssids, (unsigned int) num_ssid); 2960 num_ssid = max_sched_scan_ssids; 2961 } 2962 2963 if (num_match_ssid > wpa_s->max_match_sets) { 2964 num_match_ssid = wpa_s->max_match_sets; 2965 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match"); 2966 } 2967 params.filter_ssids = os_calloc(num_match_ssid, 2968 sizeof(struct wpa_driver_scan_filter)); 2969 if (params.filter_ssids == NULL) 2970 return -1; 2971 2972 i = 0; 2973 prio = 0; 2974 ssid = wpa_s->conf->pssid[prio]; 2975 while (ssid) { 2976 if (!wpas_network_disabled(wpa_s, ssid)) { 2977 if (ssid->scan_ssid && params.num_ssids < num_ssid) { 2978 params.ssids[params.num_ssids].ssid = 2979 ssid->ssid; 2980 params.ssids[params.num_ssids].ssid_len = 2981 ssid->ssid_len; 2982 params.num_ssids++; 2983 } 2984 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid, 2985 ssid->ssid_len); 2986 params.filter_ssids[i].ssid_len = ssid->ssid_len; 2987 params.num_filter_ssids++; 2988 i++; 2989 if (i == num_match_ssid) 2990 break; 2991 } 2992 if (ssid->pnext) 2993 ssid = ssid->pnext; 2994 else if (prio + 1 == wpa_s->conf->num_prio) 2995 break; 2996 else 2997 ssid = wpa_s->conf->pssid[++prio]; 2998 } 2999 3000 if (wpa_s->conf->filter_rssi) 3001 params.filter_rssi = wpa_s->conf->filter_rssi; 3002 3003 if (wpa_s->sched_scan_plans_num) { 3004 params.sched_scan_plans = wpa_s->sched_scan_plans; 3005 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; 3006 } else { 3007 /* Set one scan plan that will run infinitely */ 3008 if (wpa_s->conf->sched_scan_interval) 3009 scan_plan.interval = wpa_s->conf->sched_scan_interval; 3010 else 3011 scan_plan.interval = 10; 3012 3013 scan_plan.iterations = 0; 3014 params.sched_scan_plans = &scan_plan; 3015 params.sched_scan_plans_num = 1; 3016 } 3017 3018 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay; 3019 3020 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) { 3021 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels"); 3022 params.freqs = wpa_s->manual_sched_scan_freqs; 3023 } 3024 3025 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) && 3026 wpa_s->wpa_state <= WPA_SCANNING) 3027 wpa_setup_mac_addr_rand_params(¶ms, wpa_s->mac_addr_pno); 3028 3029 wpa_scan_set_relative_rssi_params(wpa_s, ¶ms); 3030 3031 ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms); 3032 os_free(params.filter_ssids); 3033 os_free(params.mac_addr); 3034 if (ret == 0) 3035 wpa_s->pno = 1; 3036 else 3037 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO"); 3038 return ret; 3039 } 3040 3041 3042 int wpas_stop_pno(struct wpa_supplicant *wpa_s) 3043 { 3044 int ret = 0; 3045 3046 if (!wpa_s->pno) 3047 return 0; 3048 3049 ret = wpa_supplicant_stop_sched_scan(wpa_s); 3050 wpa_s->sched_scan_stop_req = 1; 3051 3052 wpa_s->pno = 0; 3053 wpa_s->pno_sched_pending = 0; 3054 3055 if (wpa_s->wpa_state == WPA_SCANNING) 3056 wpa_supplicant_req_scan(wpa_s, 0, 0); 3057 3058 return ret; 3059 } 3060 3061 3062 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, 3063 unsigned int type) 3064 { 3065 type &= MAC_ADDR_RAND_ALL; 3066 wpa_s->mac_addr_rand_enable &= ~type; 3067 3068 if (type & MAC_ADDR_RAND_SCAN) { 3069 os_free(wpa_s->mac_addr_scan); 3070 wpa_s->mac_addr_scan = NULL; 3071 } 3072 3073 if (type & MAC_ADDR_RAND_SCHED_SCAN) { 3074 os_free(wpa_s->mac_addr_sched_scan); 3075 wpa_s->mac_addr_sched_scan = NULL; 3076 } 3077 3078 if (type & MAC_ADDR_RAND_PNO) { 3079 os_free(wpa_s->mac_addr_pno); 3080 wpa_s->mac_addr_pno = NULL; 3081 } 3082 } 3083 3084 3085 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, 3086 unsigned int type, const u8 *addr, 3087 const u8 *mask) 3088 { 3089 u8 *tmp = NULL; 3090 3091 if ((wpa_s->mac_addr_rand_supported & type) != type ) { 3092 wpa_printf(MSG_INFO, 3093 "scan: MAC randomization type %u != supported=%u", 3094 type, wpa_s->mac_addr_rand_supported); 3095 return -1; 3096 } 3097 3098 wpas_mac_addr_rand_scan_clear(wpa_s, type); 3099 3100 if (addr) { 3101 tmp = os_malloc(2 * ETH_ALEN); 3102 if (!tmp) 3103 return -1; 3104 os_memcpy(tmp, addr, ETH_ALEN); 3105 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN); 3106 } 3107 3108 if (type == MAC_ADDR_RAND_SCAN) { 3109 wpa_s->mac_addr_scan = tmp; 3110 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) { 3111 wpa_s->mac_addr_sched_scan = tmp; 3112 } else if (type == MAC_ADDR_RAND_PNO) { 3113 wpa_s->mac_addr_pno = tmp; 3114 } else { 3115 wpa_printf(MSG_INFO, 3116 "scan: Invalid MAC randomization type=0x%x", 3117 type); 3118 os_free(tmp); 3119 return -1; 3120 } 3121 3122 wpa_s->mac_addr_rand_enable |= type; 3123 return 0; 3124 } 3125 3126 3127 int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s, 3128 unsigned int type, u8 *mask) 3129 { 3130 const u8 *to_copy; 3131 3132 if ((wpa_s->mac_addr_rand_enable & type) != type) 3133 return -1; 3134 3135 if (type == MAC_ADDR_RAND_SCAN) { 3136 to_copy = wpa_s->mac_addr_scan; 3137 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) { 3138 to_copy = wpa_s->mac_addr_sched_scan; 3139 } else if (type == MAC_ADDR_RAND_PNO) { 3140 to_copy = wpa_s->mac_addr_pno; 3141 } else { 3142 wpa_printf(MSG_DEBUG, 3143 "scan: Invalid MAC randomization type=0x%x", 3144 type); 3145 return -1; 3146 } 3147 3148 os_memcpy(mask, to_copy + ETH_ALEN, ETH_ALEN); 3149 return 0; 3150 } 3151 3152 3153 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s) 3154 { 3155 struct wpa_radio_work *work; 3156 struct wpa_radio *radio = wpa_s->radio; 3157 3158 dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) { 3159 if (work->wpa_s != wpa_s || !work->started || 3160 (os_strcmp(work->type, "scan") != 0 && 3161 os_strcmp(work->type, "p2p-scan") != 0)) 3162 continue; 3163 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan"); 3164 return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie); 3165 } 3166 3167 wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort"); 3168 return -1; 3169 } 3170 3171 3172 int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd) 3173 { 3174 struct sched_scan_plan *scan_plans = NULL; 3175 const char *token, *context = NULL; 3176 unsigned int num = 0; 3177 3178 if (!cmd) 3179 return -1; 3180 3181 if (!cmd[0]) { 3182 wpa_printf(MSG_DEBUG, "Clear sched scan plans"); 3183 os_free(wpa_s->sched_scan_plans); 3184 wpa_s->sched_scan_plans = NULL; 3185 wpa_s->sched_scan_plans_num = 0; 3186 return 0; 3187 } 3188 3189 while ((token = cstr_token(cmd, " ", &context))) { 3190 int ret; 3191 struct sched_scan_plan *scan_plan, *n; 3192 3193 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans)); 3194 if (!n) 3195 goto fail; 3196 3197 scan_plans = n; 3198 scan_plan = &scan_plans[num]; 3199 num++; 3200 3201 ret = sscanf(token, "%u:%u", &scan_plan->interval, 3202 &scan_plan->iterations); 3203 if (ret <= 0 || ret > 2 || !scan_plan->interval) { 3204 wpa_printf(MSG_ERROR, 3205 "Invalid sched scan plan input: %s", token); 3206 goto fail; 3207 } 3208 3209 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) { 3210 wpa_printf(MSG_WARNING, 3211 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)", 3212 num, scan_plan->interval, 3213 wpa_s->max_sched_scan_plan_interval); 3214 scan_plan->interval = 3215 wpa_s->max_sched_scan_plan_interval; 3216 } 3217 3218 if (ret == 1) { 3219 scan_plan->iterations = 0; 3220 break; 3221 } 3222 3223 if (!scan_plan->iterations) { 3224 wpa_printf(MSG_ERROR, 3225 "scan plan %u: Number of iterations cannot be zero", 3226 num); 3227 goto fail; 3228 } 3229 3230 if (scan_plan->iterations > 3231 wpa_s->max_sched_scan_plan_iterations) { 3232 wpa_printf(MSG_WARNING, 3233 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)", 3234 num, scan_plan->iterations, 3235 wpa_s->max_sched_scan_plan_iterations); 3236 scan_plan->iterations = 3237 wpa_s->max_sched_scan_plan_iterations; 3238 } 3239 3240 wpa_printf(MSG_DEBUG, 3241 "scan plan %u: interval=%u iterations=%u", 3242 num, scan_plan->interval, scan_plan->iterations); 3243 } 3244 3245 if (!scan_plans) { 3246 wpa_printf(MSG_ERROR, "Invalid scan plans entry"); 3247 goto fail; 3248 } 3249 3250 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) { 3251 wpa_printf(MSG_ERROR, 3252 "All scan plans but the last must specify a number of iterations"); 3253 goto fail; 3254 } 3255 3256 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u", 3257 num, scan_plans[num - 1].interval); 3258 3259 if (num > wpa_s->max_sched_scan_plans) { 3260 wpa_printf(MSG_WARNING, 3261 "Too many scheduled scan plans (only %u supported)", 3262 wpa_s->max_sched_scan_plans); 3263 wpa_printf(MSG_WARNING, 3264 "Use only the first %u scan plans, and the last one (in infinite loop)", 3265 wpa_s->max_sched_scan_plans - 1); 3266 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1], 3267 &scan_plans[num - 1], sizeof(*scan_plans)); 3268 num = wpa_s->max_sched_scan_plans; 3269 } 3270 3271 os_free(wpa_s->sched_scan_plans); 3272 wpa_s->sched_scan_plans = scan_plans; 3273 wpa_s->sched_scan_plans_num = num; 3274 3275 return 0; 3276 3277 fail: 3278 os_free(scan_plans); 3279 wpa_printf(MSG_ERROR, "invalid scan plans list"); 3280 return -1; 3281 } 3282 3283 3284 /** 3285 * wpas_scan_reset_sched_scan - Reset sched_scan state 3286 * @wpa_s: Pointer to wpa_supplicant data 3287 * 3288 * This function is used to cancel a running scheduled scan and to reset an 3289 * internal scan state to continue with a regular scan on the following 3290 * wpa_supplicant_req_scan() calls. 3291 */ 3292 void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s) 3293 { 3294 wpa_s->normal_scans = 0; 3295 if (wpa_s->sched_scanning) { 3296 wpa_s->sched_scan_timed_out = 0; 3297 wpa_s->prev_sched_ssid = NULL; 3298 wpa_supplicant_cancel_sched_scan(wpa_s); 3299 } 3300 } 3301 3302 3303 void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s) 3304 { 3305 /* simulate timeout to restart the sched scan */ 3306 wpa_s->sched_scan_timed_out = 1; 3307 wpa_s->prev_sched_ssid = NULL; 3308 wpa_supplicant_cancel_sched_scan(wpa_s); 3309 } 3310