1189251Ssam/* 2189251Ssam * WPA Supplicant - Scanning 3346981Scy * Copyright (c) 2003-2019, Jouni Malinen <j@w1.fi> 4189251Ssam * 5252726Srpaulo * This software may be distributed under the terms of the BSD license. 6252726Srpaulo * See README for more details. 7189251Ssam */ 8189251Ssam 9214734Srpaulo#include "utils/includes.h" 10189251Ssam 11214734Srpaulo#include "utils/common.h" 12214734Srpaulo#include "utils/eloop.h" 13214734Srpaulo#include "common/ieee802_11_defs.h" 14281806Srpaulo#include "common/wpa_ctrl.h" 15189251Ssam#include "config.h" 16189251Ssam#include "wpa_supplicant_i.h" 17214734Srpaulo#include "driver_i.h" 18189251Ssam#include "wps_supplicant.h" 19252726Srpaulo#include "p2p_supplicant.h" 20252726Srpaulo#include "p2p/p2p.h" 21252726Srpaulo#include "hs20_supplicant.h" 22214734Srpaulo#include "notify.h" 23214734Srpaulo#include "bss.h" 24214734Srpaulo#include "scan.h" 25281806Srpaulo#include "mesh.h" 26189251Ssam 27189251Ssam 28189251Ssamstatic void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) 29189251Ssam{ 30189251Ssam struct wpa_ssid *ssid; 31189251Ssam union wpa_event_data data; 32189251Ssam 33189251Ssam ssid = wpa_supplicant_get_ssid(wpa_s); 34189251Ssam if (ssid == NULL) 35189251Ssam return; 36189251Ssam 37214734Srpaulo if (wpa_s->current_ssid == NULL) { 38189251Ssam wpa_s->current_ssid = ssid; 39337817Scy wpas_notify_network_changed(wpa_s); 40214734Srpaulo } 41189251Ssam wpa_supplicant_initiate_eapol(wpa_s); 42252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " 43252726Srpaulo "network - generating associated event"); 44189251Ssam os_memset(&data, 0, sizeof(data)); 45189251Ssam wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); 46189251Ssam} 47189251Ssam 48189251Ssam 49189251Ssam#ifdef CONFIG_WPS 50252726Srpaulostatic int wpas_wps_in_use(struct wpa_supplicant *wpa_s, 51189251Ssam enum wps_request_type *req_type) 52189251Ssam{ 53189251Ssam struct wpa_ssid *ssid; 54189251Ssam int wps = 0; 55189251Ssam 56252726Srpaulo for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 57189251Ssam if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) 58189251Ssam continue; 59189251Ssam 60189251Ssam wps = 1; 61189251Ssam *req_type = wpas_wps_get_req_type(ssid); 62337817Scy if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1")) 63189251Ssam return 2; 64189251Ssam } 65189251Ssam 66252726Srpaulo#ifdef CONFIG_P2P 67252726Srpaulo if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p && 68252726Srpaulo !wpa_s->conf->p2p_disabled) { 69252726Srpaulo wpa_s->wps->dev.p2p = 1; 70252726Srpaulo if (!wps) { 71252726Srpaulo wps = 1; 72252726Srpaulo *req_type = WPS_REQ_ENROLLEE_INFO; 73252726Srpaulo } 74252726Srpaulo } 75252726Srpaulo#endif /* CONFIG_P2P */ 76252726Srpaulo 77189251Ssam return wps; 78189251Ssam} 79189251Ssam#endif /* CONFIG_WPS */ 80189251Ssam 81209158Srpaulo 82252726Srpaulo/** 83252726Srpaulo * wpa_supplicant_enabled_networks - Check whether there are enabled networks 84252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 85252726Srpaulo * Returns: 0 if no networks are enabled, >0 if networks are enabled 86252726Srpaulo * 87252726Srpaulo * This function is used to figure out whether any networks (or Interworking 88252726Srpaulo * with enabled credentials and auto_interworking) are present in the current 89252726Srpaulo * configuration. 90252726Srpaulo */ 91252726Srpauloint wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s) 92209158Srpaulo{ 93252726Srpaulo struct wpa_ssid *ssid = wpa_s->conf->ssid; 94252726Srpaulo int count = 0, disabled = 0; 95281806Srpaulo 96281806Srpaulo if (wpa_s->p2p_mgmt) 97281806Srpaulo return 0; /* no normal network profiles on p2p_mgmt interface */ 98281806Srpaulo 99209158Srpaulo while (ssid) { 100252726Srpaulo if (!wpas_network_disabled(wpa_s, ssid)) 101252726Srpaulo count++; 102252726Srpaulo else 103252726Srpaulo disabled++; 104209158Srpaulo ssid = ssid->next; 105209158Srpaulo } 106252726Srpaulo if (wpa_s->conf->cred && wpa_s->conf->interworking && 107252726Srpaulo wpa_s->conf->auto_interworking) 108252726Srpaulo count++; 109252726Srpaulo if (count == 0 && disabled > 0) { 110252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled " 111252726Srpaulo "networks)", disabled); 112252726Srpaulo } 113252726Srpaulo return count; 114209158Srpaulo} 115209158Srpaulo 116209158Srpaulo 117214734Srpaulostatic void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, 118214734Srpaulo struct wpa_ssid *ssid) 119214734Srpaulo{ 120346981Scy int min_temp_disabled = 0; 121346981Scy 122214734Srpaulo while (ssid) { 123346981Scy if (!wpas_network_disabled(wpa_s, ssid)) { 124346981Scy int temp_disabled = wpas_temp_disabled(wpa_s, ssid); 125346981Scy 126346981Scy if (temp_disabled <= 0) 127346981Scy break; 128346981Scy 129346981Scy if (!min_temp_disabled || 130346981Scy temp_disabled < min_temp_disabled) 131346981Scy min_temp_disabled = temp_disabled; 132346981Scy } 133214734Srpaulo ssid = ssid->next; 134214734Srpaulo } 135214734Srpaulo 136214734Srpaulo /* ap_scan=2 mode - try to associate with each SSID. */ 137214734Srpaulo if (ssid == NULL) { 138252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " 139252726Srpaulo "end of scan list - go back to beginning"); 140214734Srpaulo wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 141346981Scy wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0); 142214734Srpaulo return; 143214734Srpaulo } 144214734Srpaulo if (ssid->next) { 145214734Srpaulo /* Continue from the next SSID on the next attempt. */ 146214734Srpaulo wpa_s->prev_scan_ssid = ssid; 147214734Srpaulo } else { 148214734Srpaulo /* Start from the beginning of the SSID list. */ 149214734Srpaulo wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 150214734Srpaulo } 151214734Srpaulo wpa_supplicant_associate(wpa_s, NULL, ssid); 152214734Srpaulo} 153214734Srpaulo 154214734Srpaulo 155281806Srpaulostatic void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit) 156214734Srpaulo{ 157281806Srpaulo struct wpa_supplicant *wpa_s = work->wpa_s; 158281806Srpaulo struct wpa_driver_scan_params *params = work->ctx; 159281806Srpaulo int ret; 160214734Srpaulo 161281806Srpaulo if (deinit) { 162281806Srpaulo if (!work->started) { 163281806Srpaulo wpa_scan_free_params(params); 164281806Srpaulo return; 165281806Srpaulo } 166281806Srpaulo wpa_supplicant_notify_scanning(wpa_s, 0); 167281806Srpaulo wpas_notify_scan_done(wpa_s, 0); 168281806Srpaulo wpa_s->scan_work = NULL; 169281806Srpaulo return; 170281806Srpaulo } 171214734Srpaulo 172281806Srpaulo if (wpas_update_random_addr_disassoc(wpa_s) < 0) { 173281806Srpaulo wpa_msg(wpa_s, MSG_INFO, 174281806Srpaulo "Failed to assign random MAC address for a scan"); 175337817Scy wpa_scan_free_params(params); 176337817Scy wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1"); 177281806Srpaulo radio_work_done(work); 178214734Srpaulo return; 179214734Srpaulo } 180214734Srpaulo 181281806Srpaulo wpa_supplicant_notify_scanning(wpa_s, 1); 182214734Srpaulo 183281806Srpaulo if (wpa_s->clear_driver_scan_cache) { 184281806Srpaulo wpa_printf(MSG_DEBUG, 185281806Srpaulo "Request driver to clear scan cache due to local BSS flush"); 186281806Srpaulo params->only_new_results = 1; 187281806Srpaulo } 188281806Srpaulo ret = wpa_drv_scan(wpa_s, params); 189346981Scy /* 190346981Scy * Store the obtained vendor scan cookie (if any) in wpa_s context. 191346981Scy * The current design is to allow only one scan request on each 192346981Scy * interface, hence having this scan cookie stored in wpa_s context is 193346981Scy * fine for now. 194346981Scy * 195346981Scy * Revisit this logic if concurrent scan operations per interface 196346981Scy * is supported. 197346981Scy */ 198346981Scy if (ret == 0) 199346981Scy wpa_s->curr_scan_cookie = params->scan_cookie; 200281806Srpaulo wpa_scan_free_params(params); 201281806Srpaulo work->ctx = NULL; 202281806Srpaulo if (ret) { 203346981Scy int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ && 204346981Scy !wpa_s->beacon_rep_data.token; 205214734Srpaulo 206281806Srpaulo if (wpa_s->disconnected) 207281806Srpaulo retry = 0; 208214734Srpaulo 209281806Srpaulo wpa_supplicant_notify_scanning(wpa_s, 0); 210281806Srpaulo wpas_notify_scan_done(wpa_s, 0); 211281806Srpaulo if (wpa_s->wpa_state == WPA_SCANNING) 212281806Srpaulo wpa_supplicant_set_state(wpa_s, 213281806Srpaulo wpa_s->scan_prev_wpa_state); 214281806Srpaulo wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s", 215281806Srpaulo ret, retry ? " retry=1" : ""); 216281806Srpaulo radio_work_done(work); 217214734Srpaulo 218281806Srpaulo if (retry) { 219281806Srpaulo /* Restore scan_req since we will try to scan again */ 220281806Srpaulo wpa_s->scan_req = wpa_s->last_scan_req; 221281806Srpaulo wpa_supplicant_req_scan(wpa_s, 1, 0); 222346981Scy } else if (wpa_s->scan_res_handler) { 223346981Scy /* Clear the scan_res_handler */ 224346981Scy wpa_s->scan_res_handler = NULL; 225281806Srpaulo } 226346981Scy 227346981Scy if (wpa_s->beacon_rep_data.token) 228346981Scy wpas_rrm_refuse_request(wpa_s); 229346981Scy 230214734Srpaulo return; 231281806Srpaulo } 232214734Srpaulo 233281806Srpaulo os_get_reltime(&wpa_s->scan_trigger_time); 234281806Srpaulo wpa_s->scan_runs++; 235281806Srpaulo wpa_s->normal_scans++; 236281806Srpaulo wpa_s->own_scan_requested = 1; 237281806Srpaulo wpa_s->clear_driver_scan_cache = 0; 238281806Srpaulo wpa_s->scan_work = work; 239214734Srpaulo} 240214734Srpaulo 241214734Srpaulo 242252726Srpaulo/** 243252726Srpaulo * wpa_supplicant_trigger_scan - Request driver to start a scan 244252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 245252726Srpaulo * @params: Scan parameters 246252726Srpaulo * Returns: 0 on success, -1 on failure 247252726Srpaulo */ 248214734Srpauloint wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, 249214734Srpaulo struct wpa_driver_scan_params *params) 250214734Srpaulo{ 251281806Srpaulo struct wpa_driver_scan_params *ctx; 252214734Srpaulo 253281806Srpaulo if (wpa_s->scan_work) { 254281806Srpaulo wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending"); 255281806Srpaulo return -1; 256281806Srpaulo } 257214734Srpaulo 258281806Srpaulo ctx = wpa_scan_clone_params(params); 259337817Scy if (!ctx || 260337817Scy radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0) 261281806Srpaulo { 262281806Srpaulo wpa_scan_free_params(ctx); 263337817Scy wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1"); 264281806Srpaulo return -1; 265252726Srpaulo } 266214734Srpaulo 267281806Srpaulo return 0; 268214734Srpaulo} 269214734Srpaulo 270214734Srpaulo 271252726Srpaulostatic void 272252726Srpaulowpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) 273252726Srpaulo{ 274252726Srpaulo struct wpa_supplicant *wpa_s = eloop_ctx; 275252726Srpaulo 276252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan"); 277252726Srpaulo 278252726Srpaulo if (wpa_supplicant_req_sched_scan(wpa_s)) 279252726Srpaulo wpa_supplicant_req_scan(wpa_s, 0, 0); 280252726Srpaulo} 281252726Srpaulo 282252726Srpaulo 283252726Srpaulostatic void 284252726Srpaulowpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) 285252726Srpaulo{ 286252726Srpaulo struct wpa_supplicant *wpa_s = eloop_ctx; 287252726Srpaulo 288252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); 289252726Srpaulo 290252726Srpaulo wpa_s->sched_scan_timed_out = 1; 291252726Srpaulo wpa_supplicant_cancel_sched_scan(wpa_s); 292252726Srpaulo} 293252726Srpaulo 294252726Srpaulo 295337817Scystatic int 296337817Scywpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, 297337817Scy struct wpa_driver_scan_params *params) 298252726Srpaulo{ 299252726Srpaulo int ret; 300252726Srpaulo 301252726Srpaulo wpa_supplicant_notify_scanning(wpa_s, 1); 302337817Scy ret = wpa_drv_sched_scan(wpa_s, params); 303252726Srpaulo if (ret) 304252726Srpaulo wpa_supplicant_notify_scanning(wpa_s, 0); 305252726Srpaulo else 306252726Srpaulo wpa_s->sched_scanning = 1; 307252726Srpaulo 308252726Srpaulo return ret; 309252726Srpaulo} 310252726Srpaulo 311252726Srpaulo 312337817Scystatic int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) 313252726Srpaulo{ 314252726Srpaulo int ret; 315252726Srpaulo 316252726Srpaulo ret = wpa_drv_stop_sched_scan(wpa_s); 317252726Srpaulo if (ret) { 318252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); 319252726Srpaulo /* TODO: what to do if stopping fails? */ 320252726Srpaulo return -1; 321252726Srpaulo } 322252726Srpaulo 323252726Srpaulo return ret; 324252726Srpaulo} 325252726Srpaulo 326252726Srpaulo 327214734Srpaulostatic struct wpa_driver_scan_filter * 328214734Srpaulowpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) 329214734Srpaulo{ 330214734Srpaulo struct wpa_driver_scan_filter *ssids; 331214734Srpaulo struct wpa_ssid *ssid; 332214734Srpaulo size_t count; 333214734Srpaulo 334214734Srpaulo *num_ssids = 0; 335214734Srpaulo if (!conf->filter_ssids) 336214734Srpaulo return NULL; 337214734Srpaulo 338214734Srpaulo for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { 339214734Srpaulo if (ssid->ssid && ssid->ssid_len) 340214734Srpaulo count++; 341214734Srpaulo } 342214734Srpaulo if (count == 0) 343214734Srpaulo return NULL; 344281806Srpaulo ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter)); 345214734Srpaulo if (ssids == NULL) 346214734Srpaulo return NULL; 347214734Srpaulo 348214734Srpaulo for (ssid = conf->ssid; ssid; ssid = ssid->next) { 349214734Srpaulo if (!ssid->ssid || !ssid->ssid_len) 350214734Srpaulo continue; 351214734Srpaulo os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); 352214734Srpaulo ssids[*num_ssids].ssid_len = ssid->ssid_len; 353214734Srpaulo (*num_ssids)++; 354214734Srpaulo } 355214734Srpaulo 356214734Srpaulo return ssids; 357214734Srpaulo} 358214734Srpaulo 359214734Srpaulo 360252726Srpaulostatic void wpa_supplicant_optimize_freqs( 361252726Srpaulo struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) 362189251Ssam{ 363252726Srpaulo#ifdef CONFIG_P2P 364252726Srpaulo if (params->freqs == NULL && wpa_s->p2p_in_provisioning && 365252726Srpaulo wpa_s->go_params) { 366252726Srpaulo /* Optimize provisioning state scan based on GO information */ 367252726Srpaulo if (wpa_s->p2p_in_provisioning < 5 && 368252726Srpaulo wpa_s->go_params->freq > 0) { 369252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " 370252726Srpaulo "preferred frequency %d MHz", 371252726Srpaulo wpa_s->go_params->freq); 372281806Srpaulo params->freqs = os_calloc(2, sizeof(int)); 373252726Srpaulo if (params->freqs) 374252726Srpaulo params->freqs[0] = wpa_s->go_params->freq; 375252726Srpaulo } else if (wpa_s->p2p_in_provisioning < 8 && 376252726Srpaulo wpa_s->go_params->freq_list[0]) { 377252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " 378252726Srpaulo "channels"); 379252726Srpaulo int_array_concat(¶ms->freqs, 380252726Srpaulo wpa_s->go_params->freq_list); 381252726Srpaulo if (params->freqs) 382252726Srpaulo int_array_sort_unique(params->freqs); 383252726Srpaulo } 384252726Srpaulo wpa_s->p2p_in_provisioning++; 385252726Srpaulo } 386281806Srpaulo 387281806Srpaulo if (params->freqs == NULL && wpa_s->p2p_in_invitation) { 388281806Srpaulo /* 389281806Srpaulo * Optimize scan based on GO information during persistent 390281806Srpaulo * group reinvocation 391281806Srpaulo */ 392281806Srpaulo if (wpa_s->p2p_in_invitation < 5 && 393281806Srpaulo wpa_s->p2p_invite_go_freq > 0) { 394281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation", 395281806Srpaulo wpa_s->p2p_invite_go_freq); 396281806Srpaulo params->freqs = os_calloc(2, sizeof(int)); 397281806Srpaulo if (params->freqs) 398281806Srpaulo params->freqs[0] = wpa_s->p2p_invite_go_freq; 399281806Srpaulo } 400281806Srpaulo wpa_s->p2p_in_invitation++; 401281806Srpaulo if (wpa_s->p2p_in_invitation > 20) { 402281806Srpaulo /* 403281806Srpaulo * This should not really happen since the variable is 404281806Srpaulo * cleared on group removal, but if it does happen, make 405281806Srpaulo * sure we do not get stuck in special invitation scan 406281806Srpaulo * mode. 407281806Srpaulo */ 408281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation"); 409281806Srpaulo wpa_s->p2p_in_invitation = 0; 410281806Srpaulo } 411281806Srpaulo } 412252726Srpaulo#endif /* CONFIG_P2P */ 413252726Srpaulo 414214734Srpaulo#ifdef CONFIG_WPS 415252726Srpaulo if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { 416252726Srpaulo /* 417252726Srpaulo * Optimize post-provisioning scan based on channel used 418252726Srpaulo * during provisioning. 419252726Srpaulo */ 420252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " 421252726Srpaulo "that was used during provisioning", wpa_s->wps_freq); 422281806Srpaulo params->freqs = os_calloc(2, sizeof(int)); 423252726Srpaulo if (params->freqs) 424252726Srpaulo params->freqs[0] = wpa_s->wps_freq; 425252726Srpaulo wpa_s->after_wps--; 426281806Srpaulo } else if (wpa_s->after_wps) 427281806Srpaulo wpa_s->after_wps--; 428252726Srpaulo 429252726Srpaulo if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq) 430252726Srpaulo { 431252726Srpaulo /* Optimize provisioning scan based on already known channel */ 432252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz", 433252726Srpaulo wpa_s->wps_freq); 434281806Srpaulo params->freqs = os_calloc(2, sizeof(int)); 435252726Srpaulo if (params->freqs) 436252726Srpaulo params->freqs[0] = wpa_s->wps_freq; 437252726Srpaulo wpa_s->known_wps_freq = 0; /* only do this once */ 438252726Srpaulo } 439252726Srpaulo#endif /* CONFIG_WPS */ 440252726Srpaulo} 441252726Srpaulo 442252726Srpaulo 443252726Srpaulo#ifdef CONFIG_INTERWORKING 444252726Srpaulostatic void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s, 445252726Srpaulo struct wpabuf *buf) 446252726Srpaulo{ 447252726Srpaulo wpabuf_put_u8(buf, WLAN_EID_INTERWORKING); 448252726Srpaulo wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 : 449252726Srpaulo 1 + ETH_ALEN); 450252726Srpaulo wpabuf_put_u8(buf, wpa_s->conf->access_network_type); 451252726Srpaulo /* No Venue Info */ 452252726Srpaulo if (!is_zero_ether_addr(wpa_s->conf->hessid)) 453252726Srpaulo wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN); 454252726Srpaulo} 455252726Srpaulo#endif /* CONFIG_INTERWORKING */ 456252726Srpaulo 457252726Srpaulo 458346981Scy#ifdef CONFIG_MBO 459346981Scystatic void wpas_fils_req_param_add_max_channel(struct wpa_supplicant *wpa_s, 460346981Scy struct wpabuf **ie) 461346981Scy{ 462346981Scy if (wpabuf_resize(ie, 5)) { 463346981Scy wpa_printf(MSG_DEBUG, 464346981Scy "Failed to allocate space for FILS Request Parameters element"); 465346981Scy return; 466346981Scy } 467346981Scy 468346981Scy /* FILS Request Parameters element */ 469346981Scy wpabuf_put_u8(*ie, WLAN_EID_EXTENSION); 470346981Scy wpabuf_put_u8(*ie, 3); /* FILS Request attribute length */ 471346981Scy wpabuf_put_u8(*ie, WLAN_EID_EXT_FILS_REQ_PARAMS); 472346981Scy /* Parameter control bitmap */ 473346981Scy wpabuf_put_u8(*ie, 0); 474346981Scy /* Max Channel Time field - contains the value of MaxChannelTime 475346981Scy * parameter of the MLME-SCAN.request primitive represented in units of 476346981Scy * TUs, as an unsigned integer. A Max Channel Time field value of 255 477346981Scy * is used to indicate any duration of more than 254 TUs, or an 478346981Scy * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178) 479346981Scy */ 480346981Scy wpabuf_put_u8(*ie, 255); 481346981Scy} 482346981Scy#endif /* CONFIG_MBO */ 483346981Scy 484346981Scy 485337817Scyvoid wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s) 486337817Scy{ 487337817Scy struct wpabuf *default_ies = NULL; 488337817Scy u8 ext_capab[18]; 489337817Scy int ext_capab_len; 490337817Scy enum wpa_driver_if_type type = WPA_IF_STATION; 491337817Scy 492337817Scy#ifdef CONFIG_P2P 493337817Scy if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT) 494337817Scy type = WPA_IF_P2P_CLIENT; 495337817Scy#endif /* CONFIG_P2P */ 496337817Scy 497337817Scy wpa_drv_get_ext_capa(wpa_s, type); 498337817Scy 499337817Scy ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 500337817Scy sizeof(ext_capab)); 501337817Scy if (ext_capab_len > 0 && 502337817Scy wpabuf_resize(&default_ies, ext_capab_len) == 0) 503337817Scy wpabuf_put_data(default_ies, ext_capab, ext_capab_len); 504337817Scy 505337817Scy#ifdef CONFIG_MBO 506346981Scy if (wpa_s->enable_oce & OCE_STA) 507346981Scy wpas_fils_req_param_add_max_channel(wpa_s, &default_ies); 508346981Scy /* Send MBO and OCE capabilities */ 509346981Scy if (wpabuf_resize(&default_ies, 12) == 0) 510337817Scy wpas_mbo_scan_ie(wpa_s, default_ies); 511337817Scy#endif /* CONFIG_MBO */ 512337817Scy 513337817Scy if (default_ies) 514337817Scy wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies), 515337817Scy wpabuf_len(default_ies)); 516337817Scy wpabuf_free(default_ies); 517337817Scy} 518337817Scy 519337817Scy 520252726Srpaulostatic struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s) 521252726Srpaulo{ 522252726Srpaulo struct wpabuf *extra_ie = NULL; 523289549Srpaulo u8 ext_capab[18]; 524289549Srpaulo int ext_capab_len; 525252726Srpaulo#ifdef CONFIG_WPS 526189251Ssam int wps = 0; 527189251Ssam enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; 528189251Ssam#endif /* CONFIG_WPS */ 529252726Srpaulo 530337817Scy#ifdef CONFIG_P2P 531337817Scy if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT) 532337817Scy wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT); 533337817Scy else 534337817Scy#endif /* CONFIG_P2P */ 535337817Scy wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION); 536337817Scy 537289549Srpaulo ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, 538289549Srpaulo sizeof(ext_capab)); 539289549Srpaulo if (ext_capab_len > 0 && 540289549Srpaulo wpabuf_resize(&extra_ie, ext_capab_len) == 0) 541289549Srpaulo wpabuf_put_data(extra_ie, ext_capab, ext_capab_len); 542289549Srpaulo 543252726Srpaulo#ifdef CONFIG_INTERWORKING 544252726Srpaulo if (wpa_s->conf->interworking && 545252726Srpaulo wpabuf_resize(&extra_ie, 100) == 0) 546252726Srpaulo wpas_add_interworking_elements(wpa_s, extra_ie); 547252726Srpaulo#endif /* CONFIG_INTERWORKING */ 548252726Srpaulo 549346981Scy#ifdef CONFIG_MBO 550346981Scy if (wpa_s->enable_oce & OCE_STA) 551346981Scy wpas_fils_req_param_add_max_channel(wpa_s, &extra_ie); 552346981Scy#endif /* CONFIG_MBO */ 553346981Scy 554252726Srpaulo#ifdef CONFIG_WPS 555252726Srpaulo wps = wpas_wps_in_use(wpa_s, &req_type); 556252726Srpaulo 557252726Srpaulo if (wps) { 558252726Srpaulo struct wpabuf *wps_ie; 559252726Srpaulo wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON : 560252726Srpaulo DEV_PW_DEFAULT, 561252726Srpaulo &wpa_s->wps->dev, 562252726Srpaulo wpa_s->wps->uuid, req_type, 563252726Srpaulo 0, NULL); 564252726Srpaulo if (wps_ie) { 565252726Srpaulo if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0) 566252726Srpaulo wpabuf_put_buf(extra_ie, wps_ie); 567252726Srpaulo wpabuf_free(wps_ie); 568252726Srpaulo } 569252726Srpaulo } 570252726Srpaulo 571252726Srpaulo#ifdef CONFIG_P2P 572252726Srpaulo if (wps) { 573252726Srpaulo size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); 574252726Srpaulo if (wpabuf_resize(&extra_ie, ielen) == 0) 575252726Srpaulo wpas_p2p_scan_ie(wpa_s, extra_ie); 576252726Srpaulo } 577252726Srpaulo#endif /* CONFIG_P2P */ 578252726Srpaulo 579281806Srpaulo wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie); 580281806Srpaulo 581252726Srpaulo#endif /* CONFIG_WPS */ 582252726Srpaulo 583281806Srpaulo#ifdef CONFIG_HS20 584346981Scy if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 9) == 0) 585346981Scy wpas_hs20_add_indication(extra_ie, -1, 0); 586281806Srpaulo#endif /* CONFIG_HS20 */ 587281806Srpaulo 588289549Srpaulo#ifdef CONFIG_FST 589289549Srpaulo if (wpa_s->fst_ies && 590289549Srpaulo wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0) 591289549Srpaulo wpabuf_put_buf(extra_ie, wpa_s->fst_ies); 592289549Srpaulo#endif /* CONFIG_FST */ 593289549Srpaulo 594337817Scy#ifdef CONFIG_MBO 595346981Scy /* Send MBO and OCE capabilities */ 596346981Scy if (wpabuf_resize(&extra_ie, 12) == 0) 597337817Scy wpas_mbo_scan_ie(wpa_s, extra_ie); 598337817Scy#endif /* CONFIG_MBO */ 599337817Scy 600337817Scy if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) { 601337817Scy struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]; 602337817Scy 603337817Scy if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0) 604337817Scy wpabuf_put_buf(extra_ie, buf); 605337817Scy } 606337817Scy 607252726Srpaulo return extra_ie; 608252726Srpaulo} 609252726Srpaulo 610252726Srpaulo 611252726Srpaulo#ifdef CONFIG_P2P 612252726Srpaulo 613252726Srpaulo/* 614252726Srpaulo * Check whether there are any enabled networks or credentials that could be 615252726Srpaulo * used for a non-P2P connection. 616252726Srpaulo */ 617252726Srpaulostatic int non_p2p_network_enabled(struct wpa_supplicant *wpa_s) 618252726Srpaulo{ 619252726Srpaulo struct wpa_ssid *ssid; 620252726Srpaulo 621252726Srpaulo for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 622252726Srpaulo if (wpas_network_disabled(wpa_s, ssid)) 623252726Srpaulo continue; 624252726Srpaulo if (!ssid->p2p_group) 625252726Srpaulo return 1; 626252726Srpaulo } 627252726Srpaulo 628252726Srpaulo if (wpa_s->conf->cred && wpa_s->conf->interworking && 629252726Srpaulo wpa_s->conf->auto_interworking) 630252726Srpaulo return 1; 631252726Srpaulo 632252726Srpaulo return 0; 633252726Srpaulo} 634252726Srpaulo 635281806Srpaulo#endif /* CONFIG_P2P */ 636252726Srpaulo 637281806Srpaulo 638281806Srpaulostatic void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, 639281806Srpaulo enum hostapd_hw_mode band, 640281806Srpaulo struct wpa_driver_scan_params *params) 641281806Srpaulo{ 642281806Srpaulo /* Include only supported channels for the specified band */ 643281806Srpaulo struct hostapd_hw_modes *mode; 644281806Srpaulo int count, i; 645281806Srpaulo 646281806Srpaulo mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); 647281806Srpaulo if (mode == NULL) { 648281806Srpaulo /* No channels supported in this band - use empty list */ 649281806Srpaulo params->freqs = os_zalloc(sizeof(int)); 650281806Srpaulo return; 651281806Srpaulo } 652281806Srpaulo 653281806Srpaulo params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); 654281806Srpaulo if (params->freqs == NULL) 655281806Srpaulo return; 656281806Srpaulo for (count = 0, i = 0; i < mode->num_channels; i++) { 657281806Srpaulo if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) 658252726Srpaulo continue; 659281806Srpaulo params->freqs[count++] = mode->channels[i].freq; 660281806Srpaulo } 661281806Srpaulo} 662252726Srpaulo 663281806Srpaulo 664281806Srpaulostatic void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s, 665281806Srpaulo struct wpa_driver_scan_params *params) 666281806Srpaulo{ 667281806Srpaulo if (wpa_s->hw.modes == NULL) 668281806Srpaulo return; /* unknown what channels the driver supports */ 669281806Srpaulo if (params->freqs) 670281806Srpaulo return; /* already using a limited channel set */ 671281806Srpaulo if (wpa_s->setband == WPA_SETBAND_5G) 672281806Srpaulo wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, 673281806Srpaulo params); 674281806Srpaulo else if (wpa_s->setband == WPA_SETBAND_2G) 675281806Srpaulo wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, 676281806Srpaulo params); 677281806Srpaulo} 678281806Srpaulo 679281806Srpaulo 680346981Scystatic void wpa_add_scan_ssid(struct wpa_supplicant *wpa_s, 681346981Scy struct wpa_driver_scan_params *params, 682346981Scy size_t max_ssids, const u8 *ssid, size_t ssid_len) 683346981Scy{ 684346981Scy unsigned int j; 685346981Scy 686346981Scy for (j = 0; j < params->num_ssids; j++) { 687346981Scy if (params->ssids[j].ssid_len == ssid_len && 688346981Scy params->ssids[j].ssid && 689346981Scy os_memcmp(params->ssids[j].ssid, ssid, ssid_len) == 0) 690346981Scy return; /* already in the list */ 691346981Scy } 692346981Scy 693346981Scy if (params->num_ssids + 1 > max_ssids) { 694346981Scy wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request"); 695346981Scy return; 696346981Scy } 697346981Scy 698346981Scy wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s", 699346981Scy wpa_ssid_txt(ssid, ssid_len)); 700346981Scy 701346981Scy params->ssids[params->num_ssids].ssid = ssid; 702346981Scy params->ssids[params->num_ssids].ssid_len = ssid_len; 703346981Scy params->num_ssids++; 704346981Scy} 705346981Scy 706346981Scy 707346981Scystatic void wpa_add_owe_scan_ssid(struct wpa_supplicant *wpa_s, 708346981Scy struct wpa_driver_scan_params *params, 709346981Scy struct wpa_ssid *ssid, size_t max_ssids) 710346981Scy{ 711346981Scy#ifdef CONFIG_OWE 712346981Scy struct wpa_bss *bss; 713346981Scy 714346981Scy if (!(ssid->key_mgmt & WPA_KEY_MGMT_OWE)) 715346981Scy return; 716346981Scy 717346981Scy wpa_printf(MSG_DEBUG, "OWE: Look for transition mode AP. ssid=%s", 718346981Scy wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 719346981Scy 720346981Scy dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 721346981Scy const u8 *owe, *pos, *end; 722346981Scy const u8 *owe_ssid; 723346981Scy size_t owe_ssid_len; 724346981Scy 725346981Scy if (bss->ssid_len != ssid->ssid_len || 726346981Scy os_memcmp(bss->ssid, ssid->ssid, ssid->ssid_len) != 0) 727346981Scy continue; 728346981Scy 729346981Scy owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE); 730346981Scy if (!owe || owe[1] < 4) 731346981Scy continue; 732346981Scy 733346981Scy pos = owe + 6; 734346981Scy end = owe + 2 + owe[1]; 735346981Scy 736346981Scy /* Must include BSSID and ssid_len */ 737346981Scy if (end - pos < ETH_ALEN + 1) 738346981Scy return; 739346981Scy 740346981Scy /* Skip BSSID */ 741346981Scy pos += ETH_ALEN; 742346981Scy owe_ssid_len = *pos++; 743346981Scy owe_ssid = pos; 744346981Scy 745346981Scy if ((size_t) (end - pos) < owe_ssid_len || 746346981Scy owe_ssid_len > SSID_MAX_LEN) 747346981Scy return; 748346981Scy 749346981Scy wpa_printf(MSG_DEBUG, 750346981Scy "OWE: scan_ssids: transition mode OWE ssid=%s", 751346981Scy wpa_ssid_txt(owe_ssid, owe_ssid_len)); 752346981Scy 753346981Scy wpa_add_scan_ssid(wpa_s, params, max_ssids, 754346981Scy owe_ssid, owe_ssid_len); 755346981Scy return; 756346981Scy } 757346981Scy#endif /* CONFIG_OWE */ 758346981Scy} 759346981Scy 760346981Scy 761281806Srpaulostatic void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s, 762281806Srpaulo struct wpa_driver_scan_params *params, 763281806Srpaulo size_t max_ssids) 764281806Srpaulo{ 765281806Srpaulo unsigned int i; 766281806Srpaulo struct wpa_ssid *ssid; 767281806Srpaulo 768337817Scy /* 769337817Scy * For devices with max_ssids greater than 1, leave the last slot empty 770337817Scy * for adding the wildcard scan entry. 771337817Scy */ 772337817Scy max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids; 773337817Scy 774281806Srpaulo for (i = 0; i < wpa_s->scan_id_count; i++) { 775281806Srpaulo ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]); 776346981Scy if (!ssid) 777252726Srpaulo continue; 778346981Scy if (ssid->scan_ssid) 779346981Scy wpa_add_scan_ssid(wpa_s, params, max_ssids, 780346981Scy ssid->ssid, ssid->ssid_len); 781346981Scy /* 782346981Scy * Also add the SSID of the OWE BSS, to allow discovery of 783346981Scy * transition mode APs more quickly. 784346981Scy */ 785346981Scy wpa_add_owe_scan_ssid(wpa_s, params, ssid, max_ssids); 786252726Srpaulo } 787252726Srpaulo 788281806Srpaulo wpa_s->scan_id_count = 0; 789252726Srpaulo} 790252726Srpaulo 791252726Srpaulo 792289549Srpaulostatic int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s, 793289549Srpaulo struct wpa_driver_scan_params *params, 794289549Srpaulo size_t max_ssids) 795289549Srpaulo{ 796289549Srpaulo unsigned int i; 797289549Srpaulo 798289549Srpaulo if (wpa_s->ssids_from_scan_req == NULL || 799289549Srpaulo wpa_s->num_ssids_from_scan_req == 0) 800289549Srpaulo return 0; 801289549Srpaulo 802289549Srpaulo if (wpa_s->num_ssids_from_scan_req > max_ssids) { 803289549Srpaulo wpa_s->num_ssids_from_scan_req = max_ssids; 804289549Srpaulo wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u", 805289549Srpaulo (unsigned int) max_ssids); 806289549Srpaulo } 807289549Srpaulo 808289549Srpaulo for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) { 809289549Srpaulo params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid; 810289549Srpaulo params->ssids[i].ssid_len = 811289549Srpaulo wpa_s->ssids_from_scan_req[i].ssid_len; 812289549Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "specific SSID", 813289549Srpaulo params->ssids[i].ssid, 814289549Srpaulo params->ssids[i].ssid_len); 815289549Srpaulo } 816289549Srpaulo 817289549Srpaulo params->num_ssids = wpa_s->num_ssids_from_scan_req; 818289549Srpaulo wpa_s->num_ssids_from_scan_req = 0; 819289549Srpaulo return 1; 820289549Srpaulo} 821289549Srpaulo 822289549Srpaulo 823252726Srpaulostatic void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) 824252726Srpaulo{ 825252726Srpaulo struct wpa_supplicant *wpa_s = eloop_ctx; 826252726Srpaulo struct wpa_ssid *ssid; 827281806Srpaulo int ret, p2p_in_prog; 828252726Srpaulo struct wpabuf *extra_ie = NULL; 829214734Srpaulo struct wpa_driver_scan_params params; 830252726Srpaulo struct wpa_driver_scan_params *scan_params; 831214734Srpaulo size_t max_ssids; 832281806Srpaulo int connect_without_scan = 0; 833189251Ssam 834346981Scy wpa_s->ignore_post_flush_scan_res = 0; 835281806Srpaulo 836252726Srpaulo if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { 837252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); 838252726Srpaulo return; 839252726Srpaulo } 840252726Srpaulo 841252726Srpaulo if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) { 842252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan"); 843209158Srpaulo wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); 844189251Ssam return; 845209158Srpaulo } 846189251Ssam 847281806Srpaulo if (wpa_s->scanning) { 848281806Srpaulo /* 849281806Srpaulo * If we are already in scanning state, we shall reschedule the 850281806Srpaulo * the incoming scan request. 851281806Srpaulo */ 852281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req"); 853281806Srpaulo wpa_supplicant_req_scan(wpa_s, 1, 0); 854281806Srpaulo return; 855281806Srpaulo } 856281806Srpaulo 857252726Srpaulo if (!wpa_supplicant_enabled_networks(wpa_s) && 858252726Srpaulo wpa_s->scan_req == NORMAL_SCAN_REQ) { 859252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); 860189251Ssam wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); 861189251Ssam return; 862189251Ssam } 863189251Ssam 864189251Ssam if (wpa_s->conf->ap_scan != 0 && 865214734Srpaulo (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { 866252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " 867252726Srpaulo "overriding ap_scan configuration"); 868189251Ssam wpa_s->conf->ap_scan = 0; 869214734Srpaulo wpas_notify_ap_scan_changed(wpa_s); 870189251Ssam } 871189251Ssam 872189251Ssam if (wpa_s->conf->ap_scan == 0) { 873189251Ssam wpa_supplicant_gen_assoc_event(wpa_s); 874189251Ssam return; 875189251Ssam } 876189251Ssam 877281806Srpaulo ssid = NULL; 878281806Srpaulo if (wpa_s->scan_req != MANUAL_SCAN_REQ && 879281806Srpaulo wpa_s->connect_without_scan) { 880281806Srpaulo connect_without_scan = 1; 881281806Srpaulo for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 882281806Srpaulo if (ssid == wpa_s->connect_without_scan) 883281806Srpaulo break; 884252726Srpaulo } 885252726Srpaulo } 886252726Srpaulo 887281806Srpaulo p2p_in_prog = wpas_p2p_in_progress(wpa_s); 888281806Srpaulo if (p2p_in_prog && p2p_in_prog != 2 && 889281806Srpaulo (!ssid || 890281806Srpaulo (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) { 891281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress"); 892281806Srpaulo wpa_supplicant_req_scan(wpa_s, 5, 0); 893281806Srpaulo return; 894281806Srpaulo } 895281806Srpaulo 896346981Scy /* 897346981Scy * Don't cancel the scan based on ongoing PNO; defer it. Some scans are 898346981Scy * used for changing modes inside wpa_supplicant (roaming, 899346981Scy * auto-reconnect, etc). Discarding the scan might hurt these processes. 900346981Scy * The normal use case for PNO is to suspend the host immediately after 901346981Scy * starting PNO, so the periodic 100 ms attempts to run the scan do not 902346981Scy * normally happen in practice multiple times, i.e., this is simply 903346981Scy * restarting scanning once the host is woken up and PNO stopped. 904346981Scy */ 905346981Scy if (wpa_s->pno || wpa_s->pno_sched_pending) { 906346981Scy wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress"); 907346981Scy wpa_supplicant_req_scan(wpa_s, 0, 100000); 908346981Scy return; 909346981Scy } 910346981Scy 911252726Srpaulo if (wpa_s->conf->ap_scan == 2) 912214734Srpaulo max_ssids = 1; 913214734Srpaulo else { 914214734Srpaulo max_ssids = wpa_s->max_scan_ssids; 915214734Srpaulo if (max_ssids > WPAS_MAX_SCAN_SSIDS) 916214734Srpaulo max_ssids = WPAS_MAX_SCAN_SSIDS; 917214734Srpaulo } 918214734Srpaulo 919281806Srpaulo wpa_s->last_scan_req = wpa_s->scan_req; 920252726Srpaulo wpa_s->scan_req = NORMAL_SCAN_REQ; 921214734Srpaulo 922281806Srpaulo if (connect_without_scan) { 923281806Srpaulo wpa_s->connect_without_scan = NULL; 924281806Srpaulo if (ssid) { 925281806Srpaulo wpa_printf(MSG_DEBUG, "Start a pre-selected network " 926281806Srpaulo "without scan step"); 927281806Srpaulo wpa_supplicant_associate(wpa_s, NULL, ssid); 928281806Srpaulo return; 929281806Srpaulo } 930281806Srpaulo } 931281806Srpaulo 932214734Srpaulo os_memset(¶ms, 0, sizeof(params)); 933214734Srpaulo 934281806Srpaulo wpa_s->scan_prev_wpa_state = wpa_s->wpa_state; 935189251Ssam if (wpa_s->wpa_state == WPA_DISCONNECTED || 936189251Ssam wpa_s->wpa_state == WPA_INACTIVE) 937189251Ssam wpa_supplicant_set_state(wpa_s, WPA_SCANNING); 938189251Ssam 939252726Srpaulo /* 940252726Srpaulo * If autoscan has set its own scanning parameters 941252726Srpaulo */ 942252726Srpaulo if (wpa_s->autoscan_params != NULL) { 943252726Srpaulo scan_params = wpa_s->autoscan_params; 944252726Srpaulo goto scan; 945252726Srpaulo } 946252726Srpaulo 947289549Srpaulo if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 948289549Srpaulo wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) { 949289549Srpaulo wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command"); 950289549Srpaulo goto ssid_list_set; 951289549Srpaulo } 952289549Srpaulo 953252726Srpaulo#ifdef CONFIG_P2P 954252726Srpaulo if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) && 955281806Srpaulo wpa_s->go_params && !wpa_s->conf->passive_scan) { 956281806Srpaulo wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)", 957281806Srpaulo wpa_s->p2p_in_provisioning, 958281806Srpaulo wpa_s->show_group_started); 959252726Srpaulo params.ssids[0].ssid = wpa_s->go_params->ssid; 960252726Srpaulo params.ssids[0].ssid_len = wpa_s->go_params->ssid_len; 961252726Srpaulo params.num_ssids = 1; 962252726Srpaulo goto ssid_list_set; 963252726Srpaulo } 964281806Srpaulo 965281806Srpaulo if (wpa_s->p2p_in_invitation) { 966281806Srpaulo if (wpa_s->current_ssid) { 967281806Srpaulo wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation"); 968281806Srpaulo params.ssids[0].ssid = wpa_s->current_ssid->ssid; 969281806Srpaulo params.ssids[0].ssid_len = 970281806Srpaulo wpa_s->current_ssid->ssid_len; 971281806Srpaulo params.num_ssids = 1; 972281806Srpaulo } else { 973281806Srpaulo wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation"); 974281806Srpaulo } 975281806Srpaulo goto ssid_list_set; 976281806Srpaulo } 977252726Srpaulo#endif /* CONFIG_P2P */ 978252726Srpaulo 979214734Srpaulo /* Find the starting point from which to continue scanning */ 980189251Ssam ssid = wpa_s->conf->ssid; 981214734Srpaulo if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { 982189251Ssam while (ssid) { 983189251Ssam if (ssid == wpa_s->prev_scan_ssid) { 984189251Ssam ssid = ssid->next; 985189251Ssam break; 986189251Ssam } 987189251Ssam ssid = ssid->next; 988189251Ssam } 989189251Ssam } 990189251Ssam 991281806Srpaulo if (wpa_s->last_scan_req != MANUAL_SCAN_REQ && 992289549Srpaulo#ifdef CONFIG_AP 993289549Srpaulo !wpa_s->ap_iface && 994289549Srpaulo#endif /* CONFIG_AP */ 995281806Srpaulo wpa_s->conf->ap_scan == 2) { 996252726Srpaulo wpa_s->connect_without_scan = NULL; 997252726Srpaulo wpa_s->prev_scan_wildcard = 0; 998214734Srpaulo wpa_supplicant_assoc_try(wpa_s, ssid); 999214734Srpaulo return; 1000214734Srpaulo } else if (wpa_s->conf->ap_scan == 2) { 1001189251Ssam /* 1002214734Srpaulo * User-initiated scan request in ap_scan == 2; scan with 1003214734Srpaulo * wildcard SSID. 1004189251Ssam */ 1005214734Srpaulo ssid = NULL; 1006281806Srpaulo } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) { 1007281806Srpaulo /* 1008281806Srpaulo * Perform single-channel single-SSID scan for 1009281806Srpaulo * reassociate-to-same-BSS operation. 1010281806Srpaulo */ 1011281806Srpaulo /* Setup SSID */ 1012281806Srpaulo ssid = wpa_s->current_ssid; 1013281806Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", 1014281806Srpaulo ssid->ssid, ssid->ssid_len); 1015281806Srpaulo params.ssids[0].ssid = ssid->ssid; 1016281806Srpaulo params.ssids[0].ssid_len = ssid->ssid_len; 1017281806Srpaulo params.num_ssids = 1; 1018281806Srpaulo 1019281806Srpaulo /* 1020281806Srpaulo * Allocate memory for frequency array, allocate one extra 1021281806Srpaulo * slot for the zero-terminator. 1022281806Srpaulo */ 1023281806Srpaulo params.freqs = os_malloc(sizeof(int) * 2); 1024337817Scy if (params.freqs) { 1025337817Scy params.freqs[0] = wpa_s->assoc_freq; 1026337817Scy params.freqs[1] = 0; 1027281806Srpaulo } 1028281806Srpaulo 1029281806Srpaulo /* 1030281806Srpaulo * Reset the reattach flag so that we fall back to full scan if 1031281806Srpaulo * this scan fails. 1032281806Srpaulo */ 1033281806Srpaulo wpa_s->reattach = 0; 1034214734Srpaulo } else { 1035214734Srpaulo struct wpa_ssid *start = ssid, *tssid; 1036214734Srpaulo int freqs_set = 0; 1037214734Srpaulo if (ssid == NULL && max_ssids > 1) 1038214734Srpaulo ssid = wpa_s->conf->ssid; 1039214734Srpaulo while (ssid) { 1040252726Srpaulo if (!wpas_network_disabled(wpa_s, ssid) && 1041252726Srpaulo ssid->scan_ssid) { 1042214734Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", 1043214734Srpaulo ssid->ssid, ssid->ssid_len); 1044214734Srpaulo params.ssids[params.num_ssids].ssid = 1045214734Srpaulo ssid->ssid; 1046214734Srpaulo params.ssids[params.num_ssids].ssid_len = 1047214734Srpaulo ssid->ssid_len; 1048214734Srpaulo params.num_ssids++; 1049214734Srpaulo if (params.num_ssids + 1 >= max_ssids) 1050214734Srpaulo break; 1051214734Srpaulo } 1052346981Scy 1053346981Scy if (!wpas_network_disabled(wpa_s, ssid)) { 1054346981Scy /* 1055346981Scy * Also add the SSID of the OWE BSS, to allow 1056346981Scy * discovery of transition mode APs more 1057346981Scy * quickly. 1058346981Scy */ 1059346981Scy wpa_add_owe_scan_ssid(wpa_s, ¶ms, ssid, 1060346981Scy max_ssids); 1061346981Scy } 1062346981Scy 1063214734Srpaulo ssid = ssid->next; 1064214734Srpaulo if (ssid == start) 1065214734Srpaulo break; 1066214734Srpaulo if (ssid == NULL && max_ssids > 1 && 1067214734Srpaulo start != wpa_s->conf->ssid) 1068214734Srpaulo ssid = wpa_s->conf->ssid; 1069189251Ssam } 1070214734Srpaulo 1071281806Srpaulo if (wpa_s->scan_id_count && 1072281806Srpaulo wpa_s->last_scan_req == MANUAL_SCAN_REQ) 1073281806Srpaulo wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids); 1074281806Srpaulo 1075281806Srpaulo for (tssid = wpa_s->conf->ssid; 1076281806Srpaulo wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid; 1077281806Srpaulo tssid = tssid->next) { 1078252726Srpaulo if (wpas_network_disabled(wpa_s, tssid)) 1079214734Srpaulo continue; 1080214734Srpaulo if ((params.freqs || !freqs_set) && tssid->scan_freq) { 1081214734Srpaulo int_array_concat(¶ms.freqs, 1082214734Srpaulo tssid->scan_freq); 1083214734Srpaulo } else { 1084214734Srpaulo os_free(params.freqs); 1085214734Srpaulo params.freqs = NULL; 1086214734Srpaulo } 1087214734Srpaulo freqs_set = 1; 1088189251Ssam } 1089214734Srpaulo int_array_sort_unique(params.freqs); 1090189251Ssam } 1091189251Ssam 1092252726Srpaulo if (ssid && max_ssids == 1) { 1093252726Srpaulo /* 1094252726Srpaulo * If the driver is limited to 1 SSID at a time interleave 1095252726Srpaulo * wildcard SSID scans with specific SSID scans to avoid 1096252726Srpaulo * waiting a long time for a wildcard scan. 1097252726Srpaulo */ 1098252726Srpaulo if (!wpa_s->prev_scan_wildcard) { 1099252726Srpaulo params.ssids[0].ssid = NULL; 1100252726Srpaulo params.ssids[0].ssid_len = 0; 1101252726Srpaulo wpa_s->prev_scan_wildcard = 1; 1102252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for " 1103252726Srpaulo "wildcard SSID (Interleave with specific)"); 1104252726Srpaulo } else { 1105252726Srpaulo wpa_s->prev_scan_ssid = ssid; 1106252726Srpaulo wpa_s->prev_scan_wildcard = 0; 1107252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1108252726Srpaulo "Starting AP scan for specific SSID: %s", 1109252726Srpaulo wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1110252726Srpaulo } 1111252726Srpaulo } else if (ssid) { 1112252726Srpaulo /* max_ssids > 1 */ 1113252726Srpaulo 1114189251Ssam wpa_s->prev_scan_ssid = ssid; 1115252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " 1116252726Srpaulo "the scan request"); 1117252726Srpaulo params.num_ssids++; 1118281806Srpaulo } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 1119281806Srpaulo wpa_s->manual_scan_passive && params.num_ssids == 0) { 1120281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request"); 1121281806Srpaulo } else if (wpa_s->conf->passive_scan) { 1122281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1123281806Srpaulo "Use passive scan based on configuration"); 1124214734Srpaulo } else { 1125214734Srpaulo wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 1126214734Srpaulo params.num_ssids++; 1127252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " 1128252726Srpaulo "SSID"); 1129214734Srpaulo } 1130289549Srpaulo 1131252726Srpaulossid_list_set: 1132252726Srpaulo wpa_supplicant_optimize_freqs(wpa_s, ¶ms); 1133252726Srpaulo extra_ie = wpa_supplicant_extra_ies(wpa_s); 1134252726Srpaulo 1135281806Srpaulo if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 1136281806Srpaulo wpa_s->manual_scan_only_new) { 1137281806Srpaulo wpa_printf(MSG_DEBUG, 1138281806Srpaulo "Request driver to clear scan cache due to manual only_new=1 scan"); 1139281806Srpaulo params.only_new_results = 1; 1140281806Srpaulo } 1141252726Srpaulo 1142281806Srpaulo if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL && 1143281806Srpaulo wpa_s->manual_scan_freqs) { 1144281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels"); 1145281806Srpaulo params.freqs = wpa_s->manual_scan_freqs; 1146281806Srpaulo wpa_s->manual_scan_freqs = NULL; 1147281806Srpaulo } 1148281806Srpaulo 1149346981Scy if (params.freqs == NULL && wpa_s->select_network_scan_freqs) { 1150346981Scy wpa_dbg(wpa_s, MSG_DEBUG, 1151346981Scy "Limit select_network scan to specified channels"); 1152346981Scy params.freqs = wpa_s->select_network_scan_freqs; 1153346981Scy wpa_s->select_network_scan_freqs = NULL; 1154346981Scy } 1155346981Scy 1156252726Srpaulo if (params.freqs == NULL && wpa_s->next_scan_freqs) { 1157252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " 1158252726Srpaulo "generated frequency list"); 1159252726Srpaulo params.freqs = wpa_s->next_scan_freqs; 1160252726Srpaulo } else 1161252726Srpaulo os_free(wpa_s->next_scan_freqs); 1162252726Srpaulo wpa_s->next_scan_freqs = NULL; 1163281806Srpaulo wpa_setband_scan_freqs(wpa_s, ¶ms); 1164252726Srpaulo 1165281806Srpaulo /* See if user specified frequencies. If so, scan only those. */ 1166281806Srpaulo if (wpa_s->conf->freq_list && !params.freqs) { 1167281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1168281806Srpaulo "Optimize scan based on conf->freq_list"); 1169281806Srpaulo int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); 1170281806Srpaulo } 1171281806Srpaulo 1172281806Srpaulo /* Use current associated channel? */ 1173281806Srpaulo if (wpa_s->conf->scan_cur_freq && !params.freqs) { 1174281806Srpaulo unsigned int num = wpa_s->num_multichan_concurrent; 1175281806Srpaulo 1176281806Srpaulo params.freqs = os_calloc(num + 1, sizeof(int)); 1177281806Srpaulo if (params.freqs) { 1178281806Srpaulo num = get_shared_radio_freqs(wpa_s, params.freqs, num); 1179281806Srpaulo if (num > 0) { 1180281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the " 1181281806Srpaulo "current operating channels since " 1182281806Srpaulo "scan_cur_freq is enabled"); 1183281806Srpaulo } else { 1184281806Srpaulo os_free(params.freqs); 1185281806Srpaulo params.freqs = NULL; 1186281806Srpaulo } 1187281806Srpaulo } 1188281806Srpaulo } 1189281806Srpaulo 1190346981Scy#ifdef CONFIG_MBO 1191346981Scy if (wpa_s->enable_oce & OCE_STA) 1192346981Scy params.oce_scan = 1; 1193346981Scy#endif /* CONFIG_MBO */ 1194346981Scy 1195252726Srpaulo params.filter_ssids = wpa_supplicant_build_filter_ssids( 1196252726Srpaulo wpa_s->conf, ¶ms.num_filter_ssids); 1197252726Srpaulo if (extra_ie) { 1198252726Srpaulo params.extra_ies = wpabuf_head(extra_ie); 1199252726Srpaulo params.extra_ies_len = wpabuf_len(extra_ie); 1200252726Srpaulo } 1201252726Srpaulo 1202252726Srpaulo#ifdef CONFIG_P2P 1203281806Srpaulo if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation || 1204252726Srpaulo (wpa_s->show_group_started && wpa_s->go_params)) { 1205214734Srpaulo /* 1206252726Srpaulo * The interface may not yet be in P2P mode, so we have to 1207252726Srpaulo * explicitly request P2P probe to disable CCK rates. 1208214734Srpaulo */ 1209252726Srpaulo params.p2p_probe = 1; 1210189251Ssam } 1211252726Srpaulo#endif /* CONFIG_P2P */ 1212189251Ssam 1213346981Scy if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) && 1214346981Scy wpa_s->wpa_state <= WPA_SCANNING) { 1215281806Srpaulo params.mac_addr_rand = 1; 1216281806Srpaulo if (wpa_s->mac_addr_scan) { 1217281806Srpaulo params.mac_addr = wpa_s->mac_addr_scan; 1218281806Srpaulo params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN; 1219281806Srpaulo } 1220281806Srpaulo } 1221281806Srpaulo 1222337817Scy if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) { 1223337817Scy struct wpa_bss *bss; 1224337817Scy 1225337817Scy params.bssid = wpa_s->next_scan_bssid; 1226337817Scy bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid); 1227337817Scy if (bss && bss->ssid_len && params.num_ssids == 1 && 1228337817Scy params.ssids[0].ssid_len == 0) { 1229337817Scy params.ssids[0].ssid = bss->ssid; 1230337817Scy params.ssids[0].ssid_len = bss->ssid_len; 1231337817Scy wpa_dbg(wpa_s, MSG_DEBUG, 1232337817Scy "Scan a previously specified BSSID " MACSTR 1233337817Scy " and SSID %s", 1234337817Scy MAC2STR(params.bssid), 1235337817Scy wpa_ssid_txt(bss->ssid, bss->ssid_len)); 1236337817Scy } else { 1237337817Scy wpa_dbg(wpa_s, MSG_DEBUG, 1238337817Scy "Scan a previously specified BSSID " MACSTR, 1239337817Scy MAC2STR(params.bssid)); 1240337817Scy } 1241337817Scy } 1242337817Scy 1243252726Srpaulo scan_params = ¶ms; 1244252726Srpaulo 1245252726Srpauloscan: 1246252726Srpaulo#ifdef CONFIG_P2P 1247252726Srpaulo /* 1248252726Srpaulo * If the driver does not support multi-channel concurrency and a 1249252726Srpaulo * virtual interface that shares the same radio with the wpa_s interface 1250252726Srpaulo * is operating there may not be need to scan other channels apart from 1251252726Srpaulo * the current operating channel on the other virtual interface. Filter 1252252726Srpaulo * out other channels in case we are trying to find a connection for a 1253252726Srpaulo * station interface when we are not configured to prefer station 1254252726Srpaulo * connection and a concurrent operation is already in process. 1255252726Srpaulo */ 1256281806Srpaulo if (wpa_s->scan_for_connection && 1257281806Srpaulo wpa_s->last_scan_req == NORMAL_SCAN_REQ && 1258252726Srpaulo !scan_params->freqs && !params.freqs && 1259252726Srpaulo wpas_is_p2p_prioritized(wpa_s) && 1260252726Srpaulo wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && 1261252726Srpaulo non_p2p_network_enabled(wpa_s)) { 1262281806Srpaulo unsigned int num = wpa_s->num_multichan_concurrent; 1263281806Srpaulo 1264281806Srpaulo params.freqs = os_calloc(num + 1, sizeof(int)); 1265281806Srpaulo if (params.freqs) { 1266281806Srpaulo num = get_shared_radio_freqs(wpa_s, params.freqs, num); 1267281806Srpaulo if (num > 0 && num == wpa_s->num_multichan_concurrent) { 1268281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used"); 1269281806Srpaulo } else { 1270281806Srpaulo os_free(params.freqs); 1271281806Srpaulo params.freqs = NULL; 1272281806Srpaulo } 1273189251Ssam } 1274189251Ssam } 1275252726Srpaulo#endif /* CONFIG_P2P */ 1276189251Ssam 1277252726Srpaulo ret = wpa_supplicant_trigger_scan(wpa_s, scan_params); 1278209158Srpaulo 1279281806Srpaulo if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs && 1280281806Srpaulo !wpa_s->manual_scan_freqs) { 1281281806Srpaulo /* Restore manual_scan_freqs for the next attempt */ 1282281806Srpaulo wpa_s->manual_scan_freqs = params.freqs; 1283281806Srpaulo params.freqs = NULL; 1284281806Srpaulo } 1285281806Srpaulo 1286252726Srpaulo wpabuf_free(extra_ie); 1287214734Srpaulo os_free(params.freqs); 1288214734Srpaulo os_free(params.filter_ssids); 1289189251Ssam 1290189251Ssam if (ret) { 1291252726Srpaulo wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); 1292281806Srpaulo if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state) 1293281806Srpaulo wpa_supplicant_set_state(wpa_s, 1294281806Srpaulo wpa_s->scan_prev_wpa_state); 1295252726Srpaulo /* Restore scan_req since we will try to scan again */ 1296281806Srpaulo wpa_s->scan_req = wpa_s->last_scan_req; 1297214734Srpaulo wpa_supplicant_req_scan(wpa_s, 1, 0); 1298252726Srpaulo } else { 1299252726Srpaulo wpa_s->scan_for_connection = 0; 1300281806Srpaulo#ifdef CONFIG_INTERWORKING 1301281806Srpaulo wpa_s->interworking_fast_assoc_tried = 0; 1302281806Srpaulo#endif /* CONFIG_INTERWORKING */ 1303337817Scy if (params.bssid) 1304337817Scy os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN); 1305214734Srpaulo } 1306189251Ssam} 1307189251Ssam 1308189251Ssam 1309281806Srpaulovoid wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec) 1310281806Srpaulo{ 1311281806Srpaulo struct os_reltime remaining, new_int; 1312281806Srpaulo int cancelled; 1313281806Srpaulo 1314281806Srpaulo cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL, 1315281806Srpaulo &remaining); 1316281806Srpaulo 1317281806Srpaulo new_int.sec = sec; 1318281806Srpaulo new_int.usec = 0; 1319281806Srpaulo if (cancelled && os_reltime_before(&remaining, &new_int)) { 1320281806Srpaulo new_int.sec = remaining.sec; 1321281806Srpaulo new_int.usec = remaining.usec; 1322281806Srpaulo } 1323281806Srpaulo 1324281806Srpaulo if (cancelled) { 1325281806Srpaulo eloop_register_timeout(new_int.sec, new_int.usec, 1326281806Srpaulo wpa_supplicant_scan, wpa_s, NULL); 1327281806Srpaulo } 1328281806Srpaulo wpa_s->scan_interval = sec; 1329281806Srpaulo} 1330281806Srpaulo 1331281806Srpaulo 1332189251Ssam/** 1333189251Ssam * wpa_supplicant_req_scan - Schedule a scan for neighboring access points 1334189251Ssam * @wpa_s: Pointer to wpa_supplicant data 1335189251Ssam * @sec: Number of seconds after which to scan 1336189251Ssam * @usec: Number of microseconds after which to scan 1337189251Ssam * 1338189251Ssam * This function is used to schedule a scan for neighboring access points after 1339189251Ssam * the specified time. 1340189251Ssam */ 1341189251Ssamvoid wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) 1342189251Ssam{ 1343281806Srpaulo int res; 1344189251Ssam 1345281806Srpaulo if (wpa_s->p2p_mgmt) { 1346281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1347281806Srpaulo "Ignore scan request (%d.%06d sec) on p2p_mgmt interface", 1348281806Srpaulo sec, usec); 1349281806Srpaulo return; 1350189251Ssam } 1351189251Ssam 1352281806Srpaulo res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, 1353281806Srpaulo NULL); 1354281806Srpaulo if (res == 1) { 1355281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec", 1356281806Srpaulo sec, usec); 1357281806Srpaulo } else if (res == 0) { 1358281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner", 1359281806Srpaulo sec, usec); 1360281806Srpaulo } else { 1361281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec", 1362281806Srpaulo sec, usec); 1363281806Srpaulo eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); 1364281806Srpaulo } 1365189251Ssam} 1366189251Ssam 1367189251Ssam 1368189251Ssam/** 1369252726Srpaulo * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan 1370252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 1371252726Srpaulo * @sec: Number of seconds after which to scan 1372252726Srpaulo * @usec: Number of microseconds after which to scan 1373252726Srpaulo * Returns: 0 on success or -1 otherwise 1374252726Srpaulo * 1375252726Srpaulo * This function is used to schedule periodic scans for neighboring 1376252726Srpaulo * access points after the specified time. 1377252726Srpaulo */ 1378252726Srpauloint wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, 1379252726Srpaulo int sec, int usec) 1380252726Srpaulo{ 1381252726Srpaulo if (!wpa_s->sched_scan_supported) 1382252726Srpaulo return -1; 1383252726Srpaulo 1384252726Srpaulo eloop_register_timeout(sec, usec, 1385252726Srpaulo wpa_supplicant_delayed_sched_scan_timeout, 1386252726Srpaulo wpa_s, NULL); 1387252726Srpaulo 1388252726Srpaulo return 0; 1389252726Srpaulo} 1390252726Srpaulo 1391252726Srpaulo 1392346981Scystatic void 1393346981Scywpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s, 1394346981Scy struct wpa_driver_scan_params *params) 1395346981Scy{ 1396346981Scy if (wpa_s->wpa_state != WPA_COMPLETED || 1397346981Scy !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) || 1398346981Scy wpa_s->srp.relative_rssi_set == 0) 1399346981Scy return; 1400346981Scy 1401346981Scy params->relative_rssi_set = 1; 1402346981Scy params->relative_rssi = wpa_s->srp.relative_rssi; 1403346981Scy 1404346981Scy if (wpa_s->srp.relative_adjust_rssi == 0) 1405346981Scy return; 1406346981Scy 1407346981Scy params->relative_adjust_band = wpa_s->srp.relative_adjust_band; 1408346981Scy params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi; 1409346981Scy} 1410346981Scy 1411346981Scy 1412252726Srpaulo/** 1413252726Srpaulo * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan 1414252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 1415252726Srpaulo * Returns: 0 is sched_scan was started or -1 otherwise 1416252726Srpaulo * 1417252726Srpaulo * This function is used to schedule periodic scans for neighboring 1418252726Srpaulo * access points repeating the scan continuously. 1419252726Srpaulo */ 1420252726Srpauloint wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) 1421252726Srpaulo{ 1422252726Srpaulo struct wpa_driver_scan_params params; 1423252726Srpaulo struct wpa_driver_scan_params *scan_params; 1424252726Srpaulo enum wpa_states prev_state; 1425252726Srpaulo struct wpa_ssid *ssid = NULL; 1426252726Srpaulo struct wpabuf *extra_ie = NULL; 1427252726Srpaulo int ret; 1428252726Srpaulo unsigned int max_sched_scan_ssids; 1429252726Srpaulo int wildcard = 0; 1430252726Srpaulo int need_ssids; 1431337817Scy struct sched_scan_plan scan_plan; 1432252726Srpaulo 1433252726Srpaulo if (!wpa_s->sched_scan_supported) 1434252726Srpaulo return -1; 1435252726Srpaulo 1436252726Srpaulo if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) 1437252726Srpaulo max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; 1438252726Srpaulo else 1439252726Srpaulo max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; 1440252726Srpaulo if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload) 1441252726Srpaulo return -1; 1442252726Srpaulo 1443337817Scy wpa_s->sched_scan_stop_req = 0; 1444337817Scy 1445252726Srpaulo if (wpa_s->sched_scanning) { 1446252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning"); 1447252726Srpaulo return 0; 1448252726Srpaulo } 1449252726Srpaulo 1450252726Srpaulo need_ssids = 0; 1451252726Srpaulo for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { 1452252726Srpaulo if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) { 1453252726Srpaulo /* Use wildcard SSID to find this network */ 1454252726Srpaulo wildcard = 1; 1455252726Srpaulo } else if (!wpas_network_disabled(wpa_s, ssid) && 1456252726Srpaulo ssid->ssid_len) 1457252726Srpaulo need_ssids++; 1458252726Srpaulo 1459252726Srpaulo#ifdef CONFIG_WPS 1460252726Srpaulo if (!wpas_network_disabled(wpa_s, ssid) && 1461252726Srpaulo ssid->key_mgmt == WPA_KEY_MGMT_WPS) { 1462252726Srpaulo /* 1463252726Srpaulo * Normal scan is more reliable and faster for WPS 1464252726Srpaulo * operations and since these are for short periods of 1465252726Srpaulo * time, the benefit of trying to use sched_scan would 1466252726Srpaulo * be limited. 1467252726Srpaulo */ 1468252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " 1469252726Srpaulo "sched_scan for WPS"); 1470252726Srpaulo return -1; 1471252726Srpaulo } 1472252726Srpaulo#endif /* CONFIG_WPS */ 1473252726Srpaulo } 1474252726Srpaulo if (wildcard) 1475252726Srpaulo need_ssids++; 1476252726Srpaulo 1477252726Srpaulo if (wpa_s->normal_scans < 3 && 1478252726Srpaulo (need_ssids <= wpa_s->max_scan_ssids || 1479252726Srpaulo wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) { 1480252726Srpaulo /* 1481252726Srpaulo * When normal scan can speed up operations, use that for the 1482252726Srpaulo * first operations before starting the sched_scan to allow 1483252726Srpaulo * user space sleep more. We do this only if the normal scan 1484252726Srpaulo * has functionality that is suitable for this or if the 1485252726Srpaulo * sched_scan does not have better support for multiple SSIDs. 1486252726Srpaulo */ 1487252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " 1488252726Srpaulo "sched_scan for initial scans (normal_scans=%d)", 1489252726Srpaulo wpa_s->normal_scans); 1490252726Srpaulo return -1; 1491252726Srpaulo } 1492252726Srpaulo 1493252726Srpaulo os_memset(¶ms, 0, sizeof(params)); 1494252726Srpaulo 1495252726Srpaulo /* If we can't allocate space for the filters, we just don't filter */ 1496281806Srpaulo params.filter_ssids = os_calloc(wpa_s->max_match_sets, 1497252726Srpaulo sizeof(struct wpa_driver_scan_filter)); 1498252726Srpaulo 1499252726Srpaulo prev_state = wpa_s->wpa_state; 1500252726Srpaulo if (wpa_s->wpa_state == WPA_DISCONNECTED || 1501252726Srpaulo wpa_s->wpa_state == WPA_INACTIVE) 1502252726Srpaulo wpa_supplicant_set_state(wpa_s, WPA_SCANNING); 1503252726Srpaulo 1504252726Srpaulo if (wpa_s->autoscan_params != NULL) { 1505252726Srpaulo scan_params = wpa_s->autoscan_params; 1506252726Srpaulo goto scan; 1507252726Srpaulo } 1508252726Srpaulo 1509252726Srpaulo /* Find the starting point from which to continue scanning */ 1510252726Srpaulo ssid = wpa_s->conf->ssid; 1511252726Srpaulo if (wpa_s->prev_sched_ssid) { 1512252726Srpaulo while (ssid) { 1513252726Srpaulo if (ssid == wpa_s->prev_sched_ssid) { 1514252726Srpaulo ssid = ssid->next; 1515252726Srpaulo break; 1516252726Srpaulo } 1517252726Srpaulo ssid = ssid->next; 1518252726Srpaulo } 1519252726Srpaulo } 1520252726Srpaulo 1521252726Srpaulo if (!ssid || !wpa_s->prev_sched_ssid) { 1522252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); 1523252726Srpaulo wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; 1524252726Srpaulo wpa_s->first_sched_scan = 1; 1525252726Srpaulo ssid = wpa_s->conf->ssid; 1526252726Srpaulo wpa_s->prev_sched_ssid = ssid; 1527252726Srpaulo } 1528252726Srpaulo 1529252726Srpaulo if (wildcard) { 1530252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan"); 1531252726Srpaulo params.num_ssids++; 1532252726Srpaulo } 1533252726Srpaulo 1534252726Srpaulo while (ssid) { 1535252726Srpaulo if (wpas_network_disabled(wpa_s, ssid)) 1536252726Srpaulo goto next; 1537252726Srpaulo 1538252726Srpaulo if (params.num_filter_ssids < wpa_s->max_match_sets && 1539252726Srpaulo params.filter_ssids && ssid->ssid && ssid->ssid_len) { 1540252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s", 1541252726Srpaulo wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1542252726Srpaulo os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid, 1543252726Srpaulo ssid->ssid, ssid->ssid_len); 1544252726Srpaulo params.filter_ssids[params.num_filter_ssids].ssid_len = 1545252726Srpaulo ssid->ssid_len; 1546252726Srpaulo params.num_filter_ssids++; 1547252726Srpaulo } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len) 1548252726Srpaulo { 1549252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID " 1550252726Srpaulo "filter for sched_scan - drop filter"); 1551252726Srpaulo os_free(params.filter_ssids); 1552252726Srpaulo params.filter_ssids = NULL; 1553252726Srpaulo params.num_filter_ssids = 0; 1554252726Srpaulo } 1555252726Srpaulo 1556252726Srpaulo if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) { 1557252726Srpaulo if (params.num_ssids == max_sched_scan_ssids) 1558252726Srpaulo break; /* only room for broadcast SSID */ 1559252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1560252726Srpaulo "add to active scan ssid: %s", 1561252726Srpaulo wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1562252726Srpaulo params.ssids[params.num_ssids].ssid = 1563252726Srpaulo ssid->ssid; 1564252726Srpaulo params.ssids[params.num_ssids].ssid_len = 1565252726Srpaulo ssid->ssid_len; 1566252726Srpaulo params.num_ssids++; 1567252726Srpaulo if (params.num_ssids >= max_sched_scan_ssids) { 1568252726Srpaulo wpa_s->prev_sched_ssid = ssid; 1569252726Srpaulo do { 1570252726Srpaulo ssid = ssid->next; 1571252726Srpaulo } while (ssid && 1572252726Srpaulo (wpas_network_disabled(wpa_s, ssid) || 1573252726Srpaulo !ssid->scan_ssid)); 1574252726Srpaulo break; 1575252726Srpaulo } 1576252726Srpaulo } 1577252726Srpaulo 1578252726Srpaulo next: 1579252726Srpaulo wpa_s->prev_sched_ssid = ssid; 1580252726Srpaulo ssid = ssid->next; 1581252726Srpaulo } 1582252726Srpaulo 1583252726Srpaulo if (params.num_filter_ssids == 0) { 1584252726Srpaulo os_free(params.filter_ssids); 1585252726Srpaulo params.filter_ssids = NULL; 1586252726Srpaulo } 1587252726Srpaulo 1588252726Srpaulo extra_ie = wpa_supplicant_extra_ies(wpa_s); 1589252726Srpaulo if (extra_ie) { 1590252726Srpaulo params.extra_ies = wpabuf_head(extra_ie); 1591252726Srpaulo params.extra_ies_len = wpabuf_len(extra_ie); 1592252726Srpaulo } 1593252726Srpaulo 1594281806Srpaulo if (wpa_s->conf->filter_rssi) 1595281806Srpaulo params.filter_rssi = wpa_s->conf->filter_rssi; 1596281806Srpaulo 1597281806Srpaulo /* See if user specified frequencies. If so, scan only those. */ 1598281806Srpaulo if (wpa_s->conf->freq_list && !params.freqs) { 1599281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1600281806Srpaulo "Optimize scan based on conf->freq_list"); 1601281806Srpaulo int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); 1602281806Srpaulo } 1603281806Srpaulo 1604346981Scy#ifdef CONFIG_MBO 1605346981Scy if (wpa_s->enable_oce & OCE_STA) 1606346981Scy params.oce_scan = 1; 1607346981Scy#endif /* CONFIG_MBO */ 1608346981Scy 1609252726Srpaulo scan_params = ¶ms; 1610252726Srpaulo 1611252726Srpauloscan: 1612337817Scy wpa_s->sched_scan_timed_out = 0; 1613337817Scy 1614337817Scy /* 1615337817Scy * We cannot support multiple scan plans if the scan request includes 1616337817Scy * too many SSID's, so in this case use only the last scan plan and make 1617337817Scy * it run infinitely. It will be stopped by the timeout. 1618337817Scy */ 1619337817Scy if (wpa_s->sched_scan_plans_num == 1 || 1620337817Scy (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) { 1621337817Scy params.sched_scan_plans = wpa_s->sched_scan_plans; 1622337817Scy params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; 1623337817Scy } else if (wpa_s->sched_scan_plans_num > 1) { 1624337817Scy wpa_dbg(wpa_s, MSG_DEBUG, 1625337817Scy "Too many SSIDs. Default to using single scheduled_scan plan"); 1626337817Scy params.sched_scan_plans = 1627337817Scy &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num - 1628337817Scy 1]; 1629337817Scy params.sched_scan_plans_num = 1; 1630337817Scy } else { 1631337817Scy if (wpa_s->conf->sched_scan_interval) 1632337817Scy scan_plan.interval = wpa_s->conf->sched_scan_interval; 1633337817Scy else 1634337817Scy scan_plan.interval = 10; 1635337817Scy 1636337817Scy if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) { 1637337817Scy wpa_printf(MSG_WARNING, 1638337817Scy "Scan interval too long(%u), use the maximum allowed(%u)", 1639337817Scy scan_plan.interval, 1640337817Scy wpa_s->max_sched_scan_plan_interval); 1641337817Scy scan_plan.interval = 1642337817Scy wpa_s->max_sched_scan_plan_interval; 1643337817Scy } 1644337817Scy 1645337817Scy scan_plan.iterations = 0; 1646337817Scy params.sched_scan_plans = &scan_plan; 1647337817Scy params.sched_scan_plans_num = 1; 1648337817Scy } 1649337817Scy 1650346981Scy params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay; 1651346981Scy 1652252726Srpaulo if (ssid || !wpa_s->first_sched_scan) { 1653252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, 1654346981Scy "Starting sched scan after %u seconds: interval %u timeout %d", 1655346981Scy params.sched_scan_start_delay, 1656337817Scy params.sched_scan_plans[0].interval, 1657337817Scy wpa_s->sched_scan_timeout); 1658252726Srpaulo } else { 1659346981Scy wpa_dbg(wpa_s, MSG_DEBUG, 1660346981Scy "Starting sched scan after %u seconds (no timeout)", 1661346981Scy params.sched_scan_start_delay); 1662252726Srpaulo } 1663252726Srpaulo 1664281806Srpaulo wpa_setband_scan_freqs(wpa_s, scan_params); 1665281806Srpaulo 1666346981Scy if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) && 1667346981Scy wpa_s->wpa_state <= WPA_SCANNING) { 1668281806Srpaulo params.mac_addr_rand = 1; 1669281806Srpaulo if (wpa_s->mac_addr_sched_scan) { 1670281806Srpaulo params.mac_addr = wpa_s->mac_addr_sched_scan; 1671281806Srpaulo params.mac_addr_mask = wpa_s->mac_addr_sched_scan + 1672281806Srpaulo ETH_ALEN; 1673281806Srpaulo } 1674281806Srpaulo } 1675281806Srpaulo 1676346981Scy wpa_scan_set_relative_rssi_params(wpa_s, scan_params); 1677346981Scy 1678337817Scy ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params); 1679252726Srpaulo wpabuf_free(extra_ie); 1680252726Srpaulo os_free(params.filter_ssids); 1681252726Srpaulo if (ret) { 1682252726Srpaulo wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); 1683252726Srpaulo if (prev_state != wpa_s->wpa_state) 1684252726Srpaulo wpa_supplicant_set_state(wpa_s, prev_state); 1685252726Srpaulo return ret; 1686252726Srpaulo } 1687252726Srpaulo 1688252726Srpaulo /* If we have more SSIDs to scan, add a timeout so we scan them too */ 1689252726Srpaulo if (ssid || !wpa_s->first_sched_scan) { 1690252726Srpaulo wpa_s->sched_scan_timed_out = 0; 1691252726Srpaulo eloop_register_timeout(wpa_s->sched_scan_timeout, 0, 1692252726Srpaulo wpa_supplicant_sched_scan_timeout, 1693252726Srpaulo wpa_s, NULL); 1694252726Srpaulo wpa_s->first_sched_scan = 0; 1695252726Srpaulo wpa_s->sched_scan_timeout /= 2; 1696337817Scy params.sched_scan_plans[0].interval *= 2; 1697337817Scy if ((unsigned int) wpa_s->sched_scan_timeout < 1698337817Scy params.sched_scan_plans[0].interval || 1699337817Scy params.sched_scan_plans[0].interval > 1700337817Scy wpa_s->max_sched_scan_plan_interval) { 1701337817Scy params.sched_scan_plans[0].interval = 10; 1702281806Srpaulo wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; 1703281806Srpaulo } 1704252726Srpaulo } 1705252726Srpaulo 1706281806Srpaulo /* If there is no more ssids, start next time from the beginning */ 1707281806Srpaulo if (!ssid) 1708281806Srpaulo wpa_s->prev_sched_ssid = NULL; 1709281806Srpaulo 1710252726Srpaulo return 0; 1711252726Srpaulo} 1712252726Srpaulo 1713252726Srpaulo 1714252726Srpaulo/** 1715189251Ssam * wpa_supplicant_cancel_scan - Cancel a scheduled scan request 1716189251Ssam * @wpa_s: Pointer to wpa_supplicant data 1717189251Ssam * 1718189251Ssam * This function is used to cancel a scan request scheduled with 1719189251Ssam * wpa_supplicant_req_scan(). 1720189251Ssam */ 1721189251Ssamvoid wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) 1722189251Ssam{ 1723252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); 1724189251Ssam eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); 1725189251Ssam} 1726209158Srpaulo 1727209158Srpaulo 1728252726Srpaulo/** 1729281806Srpaulo * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan 1730281806Srpaulo * @wpa_s: Pointer to wpa_supplicant data 1731281806Srpaulo * 1732281806Srpaulo * This function is used to stop a delayed scheduled scan. 1733281806Srpaulo */ 1734281806Srpaulovoid wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s) 1735281806Srpaulo{ 1736281806Srpaulo if (!wpa_s->sched_scan_supported) 1737281806Srpaulo return; 1738281806Srpaulo 1739281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan"); 1740281806Srpaulo eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout, 1741281806Srpaulo wpa_s, NULL); 1742281806Srpaulo} 1743281806Srpaulo 1744281806Srpaulo 1745281806Srpaulo/** 1746252726Srpaulo * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans 1747252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 1748252726Srpaulo * 1749252726Srpaulo * This function is used to stop a periodic scheduled scan. 1750252726Srpaulo */ 1751252726Srpaulovoid wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) 1752252726Srpaulo{ 1753252726Srpaulo if (!wpa_s->sched_scanning) 1754252726Srpaulo return; 1755252726Srpaulo 1756337817Scy if (wpa_s->sched_scanning) 1757337817Scy wpa_s->sched_scan_stop_req = 1; 1758337817Scy 1759252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); 1760252726Srpaulo eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); 1761252726Srpaulo wpa_supplicant_stop_sched_scan(wpa_s); 1762252726Srpaulo} 1763252726Srpaulo 1764252726Srpaulo 1765252726Srpaulo/** 1766252726Srpaulo * wpa_supplicant_notify_scanning - Indicate possible scan state change 1767252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 1768252726Srpaulo * @scanning: Whether scanning is currently in progress 1769252726Srpaulo * 1770252726Srpaulo * This function is to generate scanning notifycations. It is called whenever 1771252726Srpaulo * there may have been a change in scanning (scan started, completed, stopped). 1772252726Srpaulo * wpas_notify_scanning() is called whenever the scanning state changed from the 1773252726Srpaulo * previously notified state. 1774252726Srpaulo */ 1775209158Srpaulovoid wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, 1776209158Srpaulo int scanning) 1777209158Srpaulo{ 1778209158Srpaulo if (wpa_s->scanning != scanning) { 1779209158Srpaulo wpa_s->scanning = scanning; 1780214734Srpaulo wpas_notify_scanning(wpa_s); 1781209158Srpaulo } 1782209158Srpaulo} 1783209158Srpaulo 1784214734Srpaulo 1785214734Srpaulostatic int wpa_scan_get_max_rate(const struct wpa_scan_res *res) 1786214734Srpaulo{ 1787214734Srpaulo int rate = 0; 1788214734Srpaulo const u8 *ie; 1789214734Srpaulo int i; 1790214734Srpaulo 1791214734Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); 1792214734Srpaulo for (i = 0; ie && i < ie[1]; i++) { 1793214734Srpaulo if ((ie[i + 2] & 0x7f) > rate) 1794214734Srpaulo rate = ie[i + 2] & 0x7f; 1795214734Srpaulo } 1796214734Srpaulo 1797214734Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); 1798214734Srpaulo for (i = 0; ie && i < ie[1]; i++) { 1799214734Srpaulo if ((ie[i + 2] & 0x7f) > rate) 1800214734Srpaulo rate = ie[i + 2] & 0x7f; 1801214734Srpaulo } 1802214734Srpaulo 1803214734Srpaulo return rate; 1804214734Srpaulo} 1805214734Srpaulo 1806214734Srpaulo 1807252726Srpaulo/** 1808252726Srpaulo * wpa_scan_get_ie - Fetch a specified information element from a scan result 1809252726Srpaulo * @res: Scan result entry 1810252726Srpaulo * @ie: Information element identitifier (WLAN_EID_*) 1811252726Srpaulo * Returns: Pointer to the information element (id field) or %NULL if not found 1812252726Srpaulo * 1813252726Srpaulo * This function returns the first matching information element in the scan 1814252726Srpaulo * result. 1815252726Srpaulo */ 1816214734Srpauloconst u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) 1817214734Srpaulo{ 1818346981Scy size_t ie_len = res->ie_len; 1819346981Scy 1820346981Scy /* Use the Beacon frame IEs if res->ie_len is not available */ 1821346981Scy if (!ie_len) 1822346981Scy ie_len = res->beacon_ie_len; 1823346981Scy 1824346981Scy return get_ie((const u8 *) (res + 1), ie_len, ie); 1825214734Srpaulo} 1826214734Srpaulo 1827214734Srpaulo 1828252726Srpaulo/** 1829252726Srpaulo * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result 1830252726Srpaulo * @res: Scan result entry 1831252726Srpaulo * @vendor_type: Vendor type (four octets starting the IE payload) 1832252726Srpaulo * Returns: Pointer to the information element (id field) or %NULL if not found 1833252726Srpaulo * 1834252726Srpaulo * This function returns the first matching information element in the scan 1835252726Srpaulo * result. 1836252726Srpaulo */ 1837214734Srpauloconst u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, 1838214734Srpaulo u32 vendor_type) 1839214734Srpaulo{ 1840214734Srpaulo const u8 *end, *pos; 1841214734Srpaulo 1842214734Srpaulo pos = (const u8 *) (res + 1); 1843214734Srpaulo end = pos + res->ie_len; 1844214734Srpaulo 1845337817Scy while (end - pos > 1) { 1846337817Scy if (2 + pos[1] > end - pos) 1847214734Srpaulo break; 1848214734Srpaulo if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && 1849214734Srpaulo vendor_type == WPA_GET_BE32(&pos[2])) 1850214734Srpaulo return pos; 1851214734Srpaulo pos += 2 + pos[1]; 1852214734Srpaulo } 1853214734Srpaulo 1854214734Srpaulo return NULL; 1855214734Srpaulo} 1856214734Srpaulo 1857214734Srpaulo 1858252726Srpaulo/** 1859281806Srpaulo * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result 1860281806Srpaulo * @res: Scan result entry 1861281806Srpaulo * @vendor_type: Vendor type (four octets starting the IE payload) 1862281806Srpaulo * Returns: Pointer to the information element (id field) or %NULL if not found 1863281806Srpaulo * 1864281806Srpaulo * This function returns the first matching information element in the scan 1865281806Srpaulo * result. 1866281806Srpaulo * 1867281806Srpaulo * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only 1868281806Srpaulo * from Beacon frames instead of either Beacon or Probe Response frames. 1869281806Srpaulo */ 1870281806Srpauloconst u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, 1871281806Srpaulo u32 vendor_type) 1872281806Srpaulo{ 1873281806Srpaulo const u8 *end, *pos; 1874281806Srpaulo 1875281806Srpaulo if (res->beacon_ie_len == 0) 1876281806Srpaulo return NULL; 1877281806Srpaulo 1878281806Srpaulo pos = (const u8 *) (res + 1); 1879281806Srpaulo pos += res->ie_len; 1880281806Srpaulo end = pos + res->beacon_ie_len; 1881281806Srpaulo 1882337817Scy while (end - pos > 1) { 1883337817Scy if (2 + pos[1] > end - pos) 1884281806Srpaulo break; 1885281806Srpaulo if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && 1886281806Srpaulo vendor_type == WPA_GET_BE32(&pos[2])) 1887281806Srpaulo return pos; 1888281806Srpaulo pos += 2 + pos[1]; 1889281806Srpaulo } 1890281806Srpaulo 1891281806Srpaulo return NULL; 1892281806Srpaulo} 1893281806Srpaulo 1894281806Srpaulo 1895281806Srpaulo/** 1896252726Srpaulo * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result 1897252726Srpaulo * @res: Scan result entry 1898252726Srpaulo * @vendor_type: Vendor type (four octets starting the IE payload) 1899252726Srpaulo * Returns: Pointer to the information element payload or %NULL if not found 1900252726Srpaulo * 1901252726Srpaulo * This function returns concatenated payload of possibly fragmented vendor 1902252726Srpaulo * specific information elements in the scan result. The caller is responsible 1903252726Srpaulo * for freeing the returned buffer. 1904252726Srpaulo */ 1905214734Srpaulostruct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, 1906214734Srpaulo u32 vendor_type) 1907214734Srpaulo{ 1908214734Srpaulo struct wpabuf *buf; 1909214734Srpaulo const u8 *end, *pos; 1910214734Srpaulo 1911214734Srpaulo buf = wpabuf_alloc(res->ie_len); 1912214734Srpaulo if (buf == NULL) 1913214734Srpaulo return NULL; 1914214734Srpaulo 1915214734Srpaulo pos = (const u8 *) (res + 1); 1916214734Srpaulo end = pos + res->ie_len; 1917214734Srpaulo 1918337817Scy while (end - pos > 1) { 1919337817Scy if (2 + pos[1] > end - pos) 1920214734Srpaulo break; 1921214734Srpaulo if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && 1922214734Srpaulo vendor_type == WPA_GET_BE32(&pos[2])) 1923214734Srpaulo wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); 1924214734Srpaulo pos += 2 + pos[1]; 1925214734Srpaulo } 1926214734Srpaulo 1927214734Srpaulo if (wpabuf_len(buf) == 0) { 1928214734Srpaulo wpabuf_free(buf); 1929214734Srpaulo buf = NULL; 1930214734Srpaulo } 1931214734Srpaulo 1932214734Srpaulo return buf; 1933214734Srpaulo} 1934214734Srpaulo 1935214734Srpaulo 1936252726Srpaulo/* 1937252726Srpaulo * Channels with a great SNR can operate at full rate. What is a great SNR? 1938252726Srpaulo * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general 1939252726Srpaulo * rule of thumb is that any SNR above 20 is good." This one 1940252726Srpaulo * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 1941346981Scy * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in 1942346981Scy * scan_est_throughput() allow even smaller SNR values for the maximum rates 1943346981Scy * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a 1944346981Scy * somewhat conservative value here. 1945252726Srpaulo */ 1946346981Scy#define GREAT_SNR 25 1947252726Srpaulo 1948281806Srpaulo#define IS_5GHZ(n) (n > 4000) 1949281806Srpaulo 1950214734Srpaulo/* Compare function for sorting scan results. Return >0 if @b is considered 1951214734Srpaulo * better. */ 1952214734Srpaulostatic int wpa_scan_result_compar(const void *a, const void *b) 1953214734Srpaulo{ 1954252726Srpaulo#define MIN(a,b) a < b ? a : b 1955214734Srpaulo struct wpa_scan_res **_wa = (void *) a; 1956214734Srpaulo struct wpa_scan_res **_wb = (void *) b; 1957214734Srpaulo struct wpa_scan_res *wa = *_wa; 1958214734Srpaulo struct wpa_scan_res *wb = *_wb; 1959281806Srpaulo int wpa_a, wpa_b; 1960281806Srpaulo int snr_a, snr_b, snr_a_full, snr_b_full; 1961214734Srpaulo 1962214734Srpaulo /* WPA/WPA2 support preferred */ 1963214734Srpaulo wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || 1964214734Srpaulo wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; 1965214734Srpaulo wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || 1966214734Srpaulo wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; 1967214734Srpaulo 1968214734Srpaulo if (wpa_b && !wpa_a) 1969214734Srpaulo return 1; 1970214734Srpaulo if (!wpa_b && wpa_a) 1971214734Srpaulo return -1; 1972214734Srpaulo 1973214734Srpaulo /* privacy support preferred */ 1974214734Srpaulo if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && 1975214734Srpaulo (wb->caps & IEEE80211_CAP_PRIVACY)) 1976214734Srpaulo return 1; 1977214734Srpaulo if ((wa->caps & IEEE80211_CAP_PRIVACY) && 1978214734Srpaulo (wb->caps & IEEE80211_CAP_PRIVACY) == 0) 1979214734Srpaulo return -1; 1980214734Srpaulo 1981281806Srpaulo if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) { 1982281806Srpaulo snr_a_full = wa->snr; 1983281806Srpaulo snr_a = MIN(wa->snr, GREAT_SNR); 1984281806Srpaulo snr_b_full = wb->snr; 1985289549Srpaulo snr_b = MIN(wb->snr, GREAT_SNR); 1986252726Srpaulo } else { 1987281806Srpaulo /* Level is not in dBm, so we can't calculate 1988281806Srpaulo * SNR. Just use raw level (units unknown). */ 1989281806Srpaulo snr_a = snr_a_full = wa->level; 1990281806Srpaulo snr_b = snr_b_full = wb->level; 1991252726Srpaulo } 1992252726Srpaulo 1993281806Srpaulo /* if SNR is close, decide by max rate or frequency band */ 1994346981Scy if (snr_a && snr_b && abs(snr_b - snr_a) < 7) { 1995346981Scy if (wa->est_throughput != wb->est_throughput) 1996346981Scy return (int) wb->est_throughput - 1997346981Scy (int) wa->est_throughput; 1998346981Scy } 1999281806Srpaulo if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) || 2000214734Srpaulo (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { 2001252726Srpaulo if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq)) 2002252726Srpaulo return IS_5GHZ(wa->freq) ? -1 : 1; 2003214734Srpaulo } 2004214734Srpaulo 2005252726Srpaulo /* all things being equal, use SNR; if SNRs are 2006252726Srpaulo * identical, use quality values since some drivers may only report 2007252726Srpaulo * that value and leave the signal level zero */ 2008281806Srpaulo if (snr_b_full == snr_a_full) 2009252726Srpaulo return wb->qual - wa->qual; 2010281806Srpaulo return snr_b_full - snr_a_full; 2011252726Srpaulo#undef MIN 2012252726Srpaulo} 2013252726Srpaulo 2014252726Srpaulo 2015252726Srpaulo#ifdef CONFIG_WPS 2016252726Srpaulo/* Compare function for sorting scan results when searching a WPS AP for 2017252726Srpaulo * provisioning. Return >0 if @b is considered better. */ 2018252726Srpaulostatic int wpa_scan_result_wps_compar(const void *a, const void *b) 2019252726Srpaulo{ 2020252726Srpaulo struct wpa_scan_res **_wa = (void *) a; 2021252726Srpaulo struct wpa_scan_res **_wb = (void *) b; 2022252726Srpaulo struct wpa_scan_res *wa = *_wa; 2023252726Srpaulo struct wpa_scan_res *wb = *_wb; 2024252726Srpaulo int uses_wps_a, uses_wps_b; 2025252726Srpaulo struct wpabuf *wps_a, *wps_b; 2026252726Srpaulo int res; 2027252726Srpaulo 2028252726Srpaulo /* Optimization - check WPS IE existence before allocated memory and 2029252726Srpaulo * doing full reassembly. */ 2030252726Srpaulo uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; 2031252726Srpaulo uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; 2032252726Srpaulo if (uses_wps_a && !uses_wps_b) 2033252726Srpaulo return -1; 2034252726Srpaulo if (!uses_wps_a && uses_wps_b) 2035252726Srpaulo return 1; 2036252726Srpaulo 2037252726Srpaulo if (uses_wps_a && uses_wps_b) { 2038252726Srpaulo wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); 2039252726Srpaulo wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); 2040252726Srpaulo res = wps_ap_priority_compar(wps_a, wps_b); 2041252726Srpaulo wpabuf_free(wps_a); 2042252726Srpaulo wpabuf_free(wps_b); 2043252726Srpaulo if (res) 2044252726Srpaulo return res; 2045252726Srpaulo } 2046252726Srpaulo 2047252726Srpaulo /* 2048252726Srpaulo * Do not use current AP security policy as a sorting criteria during 2049252726Srpaulo * WPS provisioning step since the AP may get reconfigured at the 2050252726Srpaulo * completion of provisioning. 2051252726Srpaulo */ 2052252726Srpaulo 2053214734Srpaulo /* all things being equal, use signal level; if signal levels are 2054214734Srpaulo * identical, use quality values since some drivers may only report 2055214734Srpaulo * that value and leave the signal level zero */ 2056214734Srpaulo if (wb->level == wa->level) 2057214734Srpaulo return wb->qual - wa->qual; 2058214734Srpaulo return wb->level - wa->level; 2059214734Srpaulo} 2060252726Srpaulo#endif /* CONFIG_WPS */ 2061214734Srpaulo 2062214734Srpaulo 2063252726Srpaulostatic void dump_scan_res(struct wpa_scan_results *scan_res) 2064252726Srpaulo{ 2065252726Srpaulo#ifndef CONFIG_NO_STDOUT_DEBUG 2066252726Srpaulo size_t i; 2067252726Srpaulo 2068252726Srpaulo if (scan_res->res == NULL || scan_res->num == 0) 2069252726Srpaulo return; 2070252726Srpaulo 2071252726Srpaulo wpa_printf(MSG_EXCESSIVE, "Sorted scan results"); 2072252726Srpaulo 2073252726Srpaulo for (i = 0; i < scan_res->num; i++) { 2074252726Srpaulo struct wpa_scan_res *r = scan_res->res[i]; 2075252726Srpaulo u8 *pos; 2076281806Srpaulo if (r->flags & WPA_SCAN_LEVEL_DBM) { 2077281806Srpaulo int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID); 2078281806Srpaulo 2079252726Srpaulo wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " 2080281806Srpaulo "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u", 2081252726Srpaulo MAC2STR(r->bssid), r->freq, r->qual, 2082281806Srpaulo r->noise, noise_valid ? "" : "~", r->level, 2083281806Srpaulo r->snr, r->snr >= GREAT_SNR ? "*" : "", 2084281806Srpaulo r->flags, 2085281806Srpaulo r->age, r->est_throughput); 2086252726Srpaulo } else { 2087252726Srpaulo wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " 2088281806Srpaulo "noise=%d level=%d flags=0x%x age=%u est=%u", 2089252726Srpaulo MAC2STR(r->bssid), r->freq, r->qual, 2090281806Srpaulo r->noise, r->level, r->flags, r->age, 2091281806Srpaulo r->est_throughput); 2092252726Srpaulo } 2093252726Srpaulo pos = (u8 *) (r + 1); 2094252726Srpaulo if (r->ie_len) 2095252726Srpaulo wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len); 2096252726Srpaulo pos += r->ie_len; 2097252726Srpaulo if (r->beacon_ie_len) 2098252726Srpaulo wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs", 2099252726Srpaulo pos, r->beacon_ie_len); 2100252726Srpaulo } 2101252726Srpaulo#endif /* CONFIG_NO_STDOUT_DEBUG */ 2102252726Srpaulo} 2103252726Srpaulo 2104252726Srpaulo 2105214734Srpaulo/** 2106252726Srpaulo * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed 2107252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 2108252726Srpaulo * @bssid: BSSID to check 2109252726Srpaulo * Returns: 0 if the BSSID is filtered or 1 if not 2110252726Srpaulo * 2111252726Srpaulo * This function is used to filter out specific BSSIDs from scan reslts mainly 2112252726Srpaulo * for testing purposes (SET bssid_filter ctrl_iface command). 2113252726Srpaulo */ 2114252726Srpauloint wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, 2115252726Srpaulo const u8 *bssid) 2116252726Srpaulo{ 2117252726Srpaulo size_t i; 2118252726Srpaulo 2119252726Srpaulo if (wpa_s->bssid_filter == NULL) 2120252726Srpaulo return 1; 2121252726Srpaulo 2122252726Srpaulo for (i = 0; i < wpa_s->bssid_filter_count; i++) { 2123252726Srpaulo if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid, 2124252726Srpaulo ETH_ALEN) == 0) 2125252726Srpaulo return 1; 2126252726Srpaulo } 2127252726Srpaulo 2128252726Srpaulo return 0; 2129252726Srpaulo} 2130252726Srpaulo 2131252726Srpaulo 2132337817Scyvoid filter_scan_res(struct wpa_supplicant *wpa_s, 2133337817Scy struct wpa_scan_results *res) 2134252726Srpaulo{ 2135252726Srpaulo size_t i, j; 2136252726Srpaulo 2137252726Srpaulo if (wpa_s->bssid_filter == NULL) 2138252726Srpaulo return; 2139252726Srpaulo 2140252726Srpaulo for (i = 0, j = 0; i < res->num; i++) { 2141252726Srpaulo if (wpa_supplicant_filter_bssid_match(wpa_s, 2142252726Srpaulo res->res[i]->bssid)) { 2143252726Srpaulo res->res[j++] = res->res[i]; 2144252726Srpaulo } else { 2145252726Srpaulo os_free(res->res[i]); 2146252726Srpaulo res->res[i] = NULL; 2147252726Srpaulo } 2148252726Srpaulo } 2149252726Srpaulo 2150252726Srpaulo if (res->num != j) { 2151252726Srpaulo wpa_printf(MSG_DEBUG, "Filtered out %d scan results", 2152252726Srpaulo (int) (res->num - j)); 2153252726Srpaulo res->num = j; 2154252726Srpaulo } 2155252726Srpaulo} 2156252726Srpaulo 2157252726Srpaulo 2158281806Srpaulo/* 2159281806Srpaulo * Noise floor values to use when we have signal strength 2160337817Scy * measurements, but no noise floor measurements. These values were 2161281806Srpaulo * measured in an office environment with many APs. 2162281806Srpaulo */ 2163281806Srpaulo#define DEFAULT_NOISE_FLOOR_2GHZ (-89) 2164281806Srpaulo#define DEFAULT_NOISE_FLOOR_5GHZ (-92) 2165281806Srpaulo 2166337817Scyvoid scan_snr(struct wpa_scan_res *res) 2167281806Srpaulo{ 2168281806Srpaulo if (res->flags & WPA_SCAN_NOISE_INVALID) { 2169281806Srpaulo res->noise = IS_5GHZ(res->freq) ? 2170281806Srpaulo DEFAULT_NOISE_FLOOR_5GHZ : 2171281806Srpaulo DEFAULT_NOISE_FLOOR_2GHZ; 2172281806Srpaulo } 2173281806Srpaulo 2174281806Srpaulo if (res->flags & WPA_SCAN_LEVEL_DBM) { 2175281806Srpaulo res->snr = res->level - res->noise; 2176281806Srpaulo } else { 2177281806Srpaulo /* Level is not in dBm, so we can't calculate 2178281806Srpaulo * SNR. Just use raw level (units unknown). */ 2179281806Srpaulo res->snr = res->level; 2180281806Srpaulo } 2181281806Srpaulo} 2182281806Srpaulo 2183281806Srpaulo 2184281806Srpaulostatic unsigned int max_ht20_rate(int snr) 2185281806Srpaulo{ 2186281806Srpaulo if (snr < 6) 2187281806Srpaulo return 6500; /* HT20 MCS0 */ 2188281806Srpaulo if (snr < 8) 2189281806Srpaulo return 13000; /* HT20 MCS1 */ 2190281806Srpaulo if (snr < 13) 2191281806Srpaulo return 19500; /* HT20 MCS2 */ 2192281806Srpaulo if (snr < 17) 2193281806Srpaulo return 26000; /* HT20 MCS3 */ 2194281806Srpaulo if (snr < 20) 2195281806Srpaulo return 39000; /* HT20 MCS4 */ 2196281806Srpaulo if (snr < 23) 2197281806Srpaulo return 52000; /* HT20 MCS5 */ 2198281806Srpaulo if (snr < 24) 2199281806Srpaulo return 58500; /* HT20 MCS6 */ 2200281806Srpaulo return 65000; /* HT20 MCS7 */ 2201281806Srpaulo} 2202281806Srpaulo 2203281806Srpaulo 2204281806Srpaulostatic unsigned int max_ht40_rate(int snr) 2205281806Srpaulo{ 2206281806Srpaulo if (snr < 3) 2207281806Srpaulo return 13500; /* HT40 MCS0 */ 2208281806Srpaulo if (snr < 6) 2209281806Srpaulo return 27000; /* HT40 MCS1 */ 2210281806Srpaulo if (snr < 10) 2211281806Srpaulo return 40500; /* HT40 MCS2 */ 2212281806Srpaulo if (snr < 15) 2213281806Srpaulo return 54000; /* HT40 MCS3 */ 2214281806Srpaulo if (snr < 17) 2215281806Srpaulo return 81000; /* HT40 MCS4 */ 2216281806Srpaulo if (snr < 22) 2217281806Srpaulo return 108000; /* HT40 MCS5 */ 2218281806Srpaulo if (snr < 24) 2219281806Srpaulo return 121500; /* HT40 MCS6 */ 2220281806Srpaulo return 135000; /* HT40 MCS7 */ 2221281806Srpaulo} 2222281806Srpaulo 2223281806Srpaulo 2224281806Srpaulostatic unsigned int max_vht80_rate(int snr) 2225281806Srpaulo{ 2226281806Srpaulo if (snr < 1) 2227281806Srpaulo return 0; 2228281806Srpaulo if (snr < 2) 2229281806Srpaulo return 29300; /* VHT80 MCS0 */ 2230281806Srpaulo if (snr < 5) 2231281806Srpaulo return 58500; /* VHT80 MCS1 */ 2232281806Srpaulo if (snr < 9) 2233281806Srpaulo return 87800; /* VHT80 MCS2 */ 2234281806Srpaulo if (snr < 11) 2235281806Srpaulo return 117000; /* VHT80 MCS3 */ 2236281806Srpaulo if (snr < 15) 2237281806Srpaulo return 175500; /* VHT80 MCS4 */ 2238281806Srpaulo if (snr < 16) 2239281806Srpaulo return 234000; /* VHT80 MCS5 */ 2240281806Srpaulo if (snr < 18) 2241281806Srpaulo return 263300; /* VHT80 MCS6 */ 2242281806Srpaulo if (snr < 20) 2243281806Srpaulo return 292500; /* VHT80 MCS7 */ 2244281806Srpaulo if (snr < 22) 2245281806Srpaulo return 351000; /* VHT80 MCS8 */ 2246281806Srpaulo return 390000; /* VHT80 MCS9 */ 2247281806Srpaulo} 2248281806Srpaulo 2249281806Srpaulo 2250337817Scyvoid scan_est_throughput(struct wpa_supplicant *wpa_s, 2251337817Scy struct wpa_scan_res *res) 2252281806Srpaulo{ 2253281806Srpaulo enum local_hw_capab capab = wpa_s->hw_capab; 2254281806Srpaulo int rate; /* max legacy rate in 500 kb/s units */ 2255281806Srpaulo const u8 *ie; 2256281806Srpaulo unsigned int est, tmp; 2257281806Srpaulo int snr = res->snr; 2258281806Srpaulo 2259281806Srpaulo if (res->est_throughput) 2260281806Srpaulo return; 2261281806Srpaulo 2262281806Srpaulo /* Get maximum legacy rate */ 2263281806Srpaulo rate = wpa_scan_get_max_rate(res); 2264281806Srpaulo 2265281806Srpaulo /* Limit based on estimated SNR */ 2266281806Srpaulo if (rate > 1 * 2 && snr < 1) 2267281806Srpaulo rate = 1 * 2; 2268281806Srpaulo else if (rate > 2 * 2 && snr < 4) 2269281806Srpaulo rate = 2 * 2; 2270281806Srpaulo else if (rate > 6 * 2 && snr < 5) 2271281806Srpaulo rate = 6 * 2; 2272281806Srpaulo else if (rate > 9 * 2 && snr < 6) 2273281806Srpaulo rate = 9 * 2; 2274281806Srpaulo else if (rate > 12 * 2 && snr < 7) 2275281806Srpaulo rate = 12 * 2; 2276281806Srpaulo else if (rate > 18 * 2 && snr < 10) 2277281806Srpaulo rate = 18 * 2; 2278281806Srpaulo else if (rate > 24 * 2 && snr < 11) 2279281806Srpaulo rate = 24 * 2; 2280281806Srpaulo else if (rate > 36 * 2 && snr < 15) 2281281806Srpaulo rate = 36 * 2; 2282281806Srpaulo else if (rate > 48 * 2 && snr < 19) 2283281806Srpaulo rate = 48 * 2; 2284281806Srpaulo else if (rate > 54 * 2 && snr < 21) 2285281806Srpaulo rate = 54 * 2; 2286281806Srpaulo est = rate * 500; 2287281806Srpaulo 2288281806Srpaulo if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) { 2289281806Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP); 2290281806Srpaulo if (ie) { 2291281806Srpaulo tmp = max_ht20_rate(snr); 2292281806Srpaulo if (tmp > est) 2293281806Srpaulo est = tmp; 2294281806Srpaulo } 2295281806Srpaulo } 2296281806Srpaulo 2297281806Srpaulo if (capab == CAPAB_HT40 || capab == CAPAB_VHT) { 2298281806Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION); 2299281806Srpaulo if (ie && ie[1] >= 2 && 2300281806Srpaulo (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { 2301281806Srpaulo tmp = max_ht40_rate(snr); 2302281806Srpaulo if (tmp > est) 2303281806Srpaulo est = tmp; 2304281806Srpaulo } 2305281806Srpaulo } 2306281806Srpaulo 2307281806Srpaulo if (capab == CAPAB_VHT) { 2308281806Srpaulo /* Use +1 to assume VHT is always faster than HT */ 2309281806Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP); 2310281806Srpaulo if (ie) { 2311281806Srpaulo tmp = max_ht20_rate(snr) + 1; 2312281806Srpaulo if (tmp > est) 2313281806Srpaulo est = tmp; 2314281806Srpaulo 2315281806Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION); 2316281806Srpaulo if (ie && ie[1] >= 2 && 2317281806Srpaulo (ie[3] & 2318281806Srpaulo HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { 2319281806Srpaulo tmp = max_ht40_rate(snr) + 1; 2320281806Srpaulo if (tmp > est) 2321281806Srpaulo est = tmp; 2322281806Srpaulo } 2323281806Srpaulo 2324281806Srpaulo ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION); 2325281806Srpaulo if (ie && ie[1] >= 1 && 2326281806Srpaulo (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) { 2327281806Srpaulo tmp = max_vht80_rate(snr) + 1; 2328281806Srpaulo if (tmp > est) 2329281806Srpaulo est = tmp; 2330281806Srpaulo } 2331281806Srpaulo } 2332281806Srpaulo } 2333281806Srpaulo 2334281806Srpaulo /* TODO: channel utilization and AP load (e.g., from AP Beacon) */ 2335281806Srpaulo 2336281806Srpaulo res->est_throughput = est; 2337281806Srpaulo} 2338281806Srpaulo 2339281806Srpaulo 2340252726Srpaulo/** 2341214734Srpaulo * wpa_supplicant_get_scan_results - Get scan results 2342214734Srpaulo * @wpa_s: Pointer to wpa_supplicant data 2343214734Srpaulo * @info: Information about what was scanned or %NULL if not available 2344214734Srpaulo * @new_scan: Whether a new scan was performed 2345214734Srpaulo * Returns: Scan results, %NULL on failure 2346214734Srpaulo * 2347214734Srpaulo * This function request the current scan results from the driver and updates 2348214734Srpaulo * the local BSS list wpa_s->bss. The caller is responsible for freeing the 2349214734Srpaulo * results with wpa_scan_results_free(). 2350214734Srpaulo */ 2351214734Srpaulostruct wpa_scan_results * 2352214734Srpaulowpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, 2353214734Srpaulo struct scan_info *info, int new_scan) 2354214734Srpaulo{ 2355214734Srpaulo struct wpa_scan_results *scan_res; 2356214734Srpaulo size_t i; 2357252726Srpaulo int (*compar)(const void *, const void *) = wpa_scan_result_compar; 2358214734Srpaulo 2359252726Srpaulo scan_res = wpa_drv_get_scan_results2(wpa_s); 2360214734Srpaulo if (scan_res == NULL) { 2361252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); 2362214734Srpaulo return NULL; 2363214734Srpaulo } 2364281806Srpaulo if (scan_res->fetch_time.sec == 0) { 2365281806Srpaulo /* 2366281806Srpaulo * Make sure we have a valid timestamp if the driver wrapper 2367281806Srpaulo * does not set this. 2368281806Srpaulo */ 2369281806Srpaulo os_get_reltime(&scan_res->fetch_time); 2370281806Srpaulo } 2371252726Srpaulo filter_scan_res(wpa_s, scan_res); 2372214734Srpaulo 2373281806Srpaulo for (i = 0; i < scan_res->num; i++) { 2374281806Srpaulo struct wpa_scan_res *scan_res_item = scan_res->res[i]; 2375281806Srpaulo 2376281806Srpaulo scan_snr(scan_res_item); 2377281806Srpaulo scan_est_throughput(wpa_s, scan_res_item); 2378281806Srpaulo } 2379281806Srpaulo 2380252726Srpaulo#ifdef CONFIG_WPS 2381281806Srpaulo if (wpas_wps_searching(wpa_s)) { 2382252726Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " 2383252726Srpaulo "provisioning rules"); 2384252726Srpaulo compar = wpa_scan_result_wps_compar; 2385252726Srpaulo } 2386252726Srpaulo#endif /* CONFIG_WPS */ 2387252726Srpaulo 2388346981Scy if (scan_res->res) { 2389346981Scy qsort(scan_res->res, scan_res->num, 2390346981Scy sizeof(struct wpa_scan_res *), compar); 2391346981Scy } 2392252726Srpaulo dump_scan_res(scan_res); 2393214734Srpaulo 2394346981Scy if (wpa_s->ignore_post_flush_scan_res) { 2395346981Scy /* FLUSH command aborted an ongoing scan and these are the 2396346981Scy * results from the aborted scan. Do not process the results to 2397346981Scy * maintain flushed state. */ 2398346981Scy wpa_dbg(wpa_s, MSG_DEBUG, 2399346981Scy "Do not update BSS table based on pending post-FLUSH scan results"); 2400346981Scy wpa_s->ignore_post_flush_scan_res = 0; 2401346981Scy return scan_res; 2402346981Scy } 2403346981Scy 2404214734Srpaulo wpa_bss_update_start(wpa_s); 2405214734Srpaulo for (i = 0; i < scan_res->num; i++) 2406281806Srpaulo wpa_bss_update_scan_res(wpa_s, scan_res->res[i], 2407281806Srpaulo &scan_res->fetch_time); 2408214734Srpaulo wpa_bss_update_end(wpa_s, info, new_scan); 2409214734Srpaulo 2410214734Srpaulo return scan_res; 2411214734Srpaulo} 2412214734Srpaulo 2413214734Srpaulo 2414252726Srpaulo/** 2415252726Srpaulo * wpa_supplicant_update_scan_results - Update scan results from the driver 2416252726Srpaulo * @wpa_s: Pointer to wpa_supplicant data 2417252726Srpaulo * Returns: 0 on success, -1 on failure 2418252726Srpaulo * 2419252726Srpaulo * This function updates the BSS table within wpa_supplicant based on the 2420252726Srpaulo * currently available scan results from the driver without requesting a new 2421252726Srpaulo * scan. This is used in cases where the driver indicates an association 2422252726Srpaulo * (including roaming within ESS) and wpa_supplicant does not yet have the 2423252726Srpaulo * needed information to complete the connection (e.g., to perform validation 2424252726Srpaulo * steps in 4-way handshake). 2425252726Srpaulo */ 2426214734Srpauloint wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) 2427214734Srpaulo{ 2428214734Srpaulo struct wpa_scan_results *scan_res; 2429214734Srpaulo scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); 2430214734Srpaulo if (scan_res == NULL) 2431214734Srpaulo return -1; 2432214734Srpaulo wpa_scan_results_free(scan_res); 2433214734Srpaulo 2434214734Srpaulo return 0; 2435214734Srpaulo} 2436281806Srpaulo 2437281806Srpaulo 2438281806Srpaulo/** 2439281806Srpaulo * scan_only_handler - Reports scan results 2440281806Srpaulo */ 2441281806Srpaulovoid scan_only_handler(struct wpa_supplicant *wpa_s, 2442281806Srpaulo struct wpa_scan_results *scan_res) 2443281806Srpaulo{ 2444281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received"); 2445281806Srpaulo if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && 2446281806Srpaulo wpa_s->manual_scan_use_id && wpa_s->own_scan_running) { 2447281806Srpaulo wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u", 2448281806Srpaulo wpa_s->manual_scan_id); 2449281806Srpaulo wpa_s->manual_scan_use_id = 0; 2450281806Srpaulo } else { 2451281806Srpaulo wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS); 2452281806Srpaulo } 2453281806Srpaulo wpas_notify_scan_results(wpa_s); 2454281806Srpaulo wpas_notify_scan_done(wpa_s, 1); 2455281806Srpaulo if (wpa_s->scan_work) { 2456281806Srpaulo struct wpa_radio_work *work = wpa_s->scan_work; 2457281806Srpaulo wpa_s->scan_work = NULL; 2458281806Srpaulo radio_work_done(work); 2459281806Srpaulo } 2460337817Scy 2461337817Scy if (wpa_s->wpa_state == WPA_SCANNING) 2462337817Scy wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state); 2463281806Srpaulo} 2464281806Srpaulo 2465281806Srpaulo 2466281806Srpauloint wpas_scan_scheduled(struct wpa_supplicant *wpa_s) 2467281806Srpaulo{ 2468281806Srpaulo return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL); 2469281806Srpaulo} 2470281806Srpaulo 2471281806Srpaulo 2472281806Srpaulostruct wpa_driver_scan_params * 2473281806Srpaulowpa_scan_clone_params(const struct wpa_driver_scan_params *src) 2474281806Srpaulo{ 2475281806Srpaulo struct wpa_driver_scan_params *params; 2476281806Srpaulo size_t i; 2477281806Srpaulo u8 *n; 2478281806Srpaulo 2479281806Srpaulo params = os_zalloc(sizeof(*params)); 2480281806Srpaulo if (params == NULL) 2481281806Srpaulo return NULL; 2482281806Srpaulo 2483281806Srpaulo for (i = 0; i < src->num_ssids; i++) { 2484281806Srpaulo if (src->ssids[i].ssid) { 2485346981Scy n = os_memdup(src->ssids[i].ssid, 2486346981Scy src->ssids[i].ssid_len); 2487281806Srpaulo if (n == NULL) 2488281806Srpaulo goto failed; 2489281806Srpaulo params->ssids[i].ssid = n; 2490281806Srpaulo params->ssids[i].ssid_len = src->ssids[i].ssid_len; 2491281806Srpaulo } 2492281806Srpaulo } 2493281806Srpaulo params->num_ssids = src->num_ssids; 2494281806Srpaulo 2495281806Srpaulo if (src->extra_ies) { 2496346981Scy n = os_memdup(src->extra_ies, src->extra_ies_len); 2497281806Srpaulo if (n == NULL) 2498281806Srpaulo goto failed; 2499281806Srpaulo params->extra_ies = n; 2500281806Srpaulo params->extra_ies_len = src->extra_ies_len; 2501281806Srpaulo } 2502281806Srpaulo 2503281806Srpaulo if (src->freqs) { 2504281806Srpaulo int len = int_array_len(src->freqs); 2505346981Scy params->freqs = os_memdup(src->freqs, (len + 1) * sizeof(int)); 2506281806Srpaulo if (params->freqs == NULL) 2507281806Srpaulo goto failed; 2508281806Srpaulo } 2509281806Srpaulo 2510281806Srpaulo if (src->filter_ssids) { 2511346981Scy params->filter_ssids = os_memdup(src->filter_ssids, 2512346981Scy sizeof(*params->filter_ssids) * 2513281806Srpaulo src->num_filter_ssids); 2514281806Srpaulo if (params->filter_ssids == NULL) 2515281806Srpaulo goto failed; 2516281806Srpaulo params->num_filter_ssids = src->num_filter_ssids; 2517281806Srpaulo } 2518281806Srpaulo 2519281806Srpaulo params->filter_rssi = src->filter_rssi; 2520281806Srpaulo params->p2p_probe = src->p2p_probe; 2521281806Srpaulo params->only_new_results = src->only_new_results; 2522281806Srpaulo params->low_priority = src->low_priority; 2523346981Scy params->duration = src->duration; 2524346981Scy params->duration_mandatory = src->duration_mandatory; 2525346981Scy params->oce_scan = src->oce_scan; 2526281806Srpaulo 2527337817Scy if (src->sched_scan_plans_num > 0) { 2528337817Scy params->sched_scan_plans = 2529346981Scy os_memdup(src->sched_scan_plans, 2530346981Scy sizeof(*src->sched_scan_plans) * 2531337817Scy src->sched_scan_plans_num); 2532337817Scy if (!params->sched_scan_plans) 2533337817Scy goto failed; 2534337817Scy 2535337817Scy params->sched_scan_plans_num = src->sched_scan_plans_num; 2536337817Scy } 2537337817Scy 2538281806Srpaulo if (src->mac_addr_rand) { 2539281806Srpaulo params->mac_addr_rand = src->mac_addr_rand; 2540281806Srpaulo 2541281806Srpaulo if (src->mac_addr && src->mac_addr_mask) { 2542281806Srpaulo u8 *mac_addr; 2543281806Srpaulo 2544281806Srpaulo mac_addr = os_malloc(2 * ETH_ALEN); 2545281806Srpaulo if (!mac_addr) 2546281806Srpaulo goto failed; 2547281806Srpaulo 2548281806Srpaulo os_memcpy(mac_addr, src->mac_addr, ETH_ALEN); 2549281806Srpaulo os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask, 2550281806Srpaulo ETH_ALEN); 2551281806Srpaulo params->mac_addr = mac_addr; 2552281806Srpaulo params->mac_addr_mask = mac_addr + ETH_ALEN; 2553281806Srpaulo } 2554281806Srpaulo } 2555337817Scy 2556337817Scy if (src->bssid) { 2557337817Scy u8 *bssid; 2558337817Scy 2559346981Scy bssid = os_memdup(src->bssid, ETH_ALEN); 2560337817Scy if (!bssid) 2561337817Scy goto failed; 2562337817Scy params->bssid = bssid; 2563337817Scy } 2564337817Scy 2565346981Scy params->relative_rssi_set = src->relative_rssi_set; 2566346981Scy params->relative_rssi = src->relative_rssi; 2567346981Scy params->relative_adjust_band = src->relative_adjust_band; 2568346981Scy params->relative_adjust_rssi = src->relative_adjust_rssi; 2569281806Srpaulo return params; 2570281806Srpaulo 2571281806Srpaulofailed: 2572281806Srpaulo wpa_scan_free_params(params); 2573281806Srpaulo return NULL; 2574281806Srpaulo} 2575281806Srpaulo 2576281806Srpaulo 2577281806Srpaulovoid wpa_scan_free_params(struct wpa_driver_scan_params *params) 2578281806Srpaulo{ 2579281806Srpaulo size_t i; 2580281806Srpaulo 2581281806Srpaulo if (params == NULL) 2582281806Srpaulo return; 2583281806Srpaulo 2584281806Srpaulo for (i = 0; i < params->num_ssids; i++) 2585281806Srpaulo os_free((u8 *) params->ssids[i].ssid); 2586281806Srpaulo os_free((u8 *) params->extra_ies); 2587281806Srpaulo os_free(params->freqs); 2588281806Srpaulo os_free(params->filter_ssids); 2589337817Scy os_free(params->sched_scan_plans); 2590281806Srpaulo 2591281806Srpaulo /* 2592281806Srpaulo * Note: params->mac_addr_mask points to same memory allocation and 2593281806Srpaulo * must not be freed separately. 2594281806Srpaulo */ 2595281806Srpaulo os_free((u8 *) params->mac_addr); 2596281806Srpaulo 2597337817Scy os_free((u8 *) params->bssid); 2598337817Scy 2599281806Srpaulo os_free(params); 2600281806Srpaulo} 2601281806Srpaulo 2602281806Srpaulo 2603281806Srpauloint wpas_start_pno(struct wpa_supplicant *wpa_s) 2604281806Srpaulo{ 2605337817Scy int ret, prio; 2606281806Srpaulo size_t i, num_ssid, num_match_ssid; 2607281806Srpaulo struct wpa_ssid *ssid; 2608281806Srpaulo struct wpa_driver_scan_params params; 2609337817Scy struct sched_scan_plan scan_plan; 2610337817Scy unsigned int max_sched_scan_ssids; 2611281806Srpaulo 2612281806Srpaulo if (!wpa_s->sched_scan_supported) 2613281806Srpaulo return -1; 2614281806Srpaulo 2615337817Scy if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) 2616337817Scy max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; 2617337817Scy else 2618337817Scy max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; 2619337817Scy if (max_sched_scan_ssids < 1) 2620337817Scy return -1; 2621337817Scy 2622281806Srpaulo if (wpa_s->pno || wpa_s->pno_sched_pending) 2623281806Srpaulo return 0; 2624281806Srpaulo 2625281806Srpaulo if ((wpa_s->wpa_state > WPA_SCANNING) && 2626346981Scy (wpa_s->wpa_state < WPA_COMPLETED)) { 2627281806Srpaulo wpa_printf(MSG_ERROR, "PNO: In assoc process"); 2628281806Srpaulo return -EAGAIN; 2629281806Srpaulo } 2630281806Srpaulo 2631281806Srpaulo if (wpa_s->wpa_state == WPA_SCANNING) { 2632281806Srpaulo wpa_supplicant_cancel_scan(wpa_s); 2633281806Srpaulo if (wpa_s->sched_scanning) { 2634281806Srpaulo wpa_printf(MSG_DEBUG, "Schedule PNO on completion of " 2635281806Srpaulo "ongoing sched scan"); 2636281806Srpaulo wpa_supplicant_cancel_sched_scan(wpa_s); 2637281806Srpaulo wpa_s->pno_sched_pending = 1; 2638281806Srpaulo return 0; 2639281806Srpaulo } 2640281806Srpaulo } 2641281806Srpaulo 2642337817Scy if (wpa_s->sched_scan_stop_req) { 2643337817Scy wpa_printf(MSG_DEBUG, 2644337817Scy "Schedule PNO after previous sched scan has stopped"); 2645337817Scy wpa_s->pno_sched_pending = 1; 2646337817Scy return 0; 2647337817Scy } 2648337817Scy 2649281806Srpaulo os_memset(¶ms, 0, sizeof(params)); 2650281806Srpaulo 2651281806Srpaulo num_ssid = num_match_ssid = 0; 2652281806Srpaulo ssid = wpa_s->conf->ssid; 2653281806Srpaulo while (ssid) { 2654281806Srpaulo if (!wpas_network_disabled(wpa_s, ssid)) { 2655281806Srpaulo num_match_ssid++; 2656281806Srpaulo if (ssid->scan_ssid) 2657281806Srpaulo num_ssid++; 2658281806Srpaulo } 2659281806Srpaulo ssid = ssid->next; 2660281806Srpaulo } 2661281806Srpaulo 2662281806Srpaulo if (num_match_ssid == 0) { 2663281806Srpaulo wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs"); 2664281806Srpaulo return -1; 2665281806Srpaulo } 2666281806Srpaulo 2667281806Srpaulo if (num_match_ssid > num_ssid) { 2668281806Srpaulo params.num_ssids++; /* wildcard */ 2669281806Srpaulo num_ssid++; 2670281806Srpaulo } 2671281806Srpaulo 2672337817Scy if (num_ssid > max_sched_scan_ssids) { 2673281806Srpaulo wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from " 2674337817Scy "%u", max_sched_scan_ssids, (unsigned int) num_ssid); 2675337817Scy num_ssid = max_sched_scan_ssids; 2676281806Srpaulo } 2677281806Srpaulo 2678281806Srpaulo if (num_match_ssid > wpa_s->max_match_sets) { 2679281806Srpaulo num_match_ssid = wpa_s->max_match_sets; 2680281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match"); 2681281806Srpaulo } 2682281806Srpaulo params.filter_ssids = os_calloc(num_match_ssid, 2683281806Srpaulo sizeof(struct wpa_driver_scan_filter)); 2684281806Srpaulo if (params.filter_ssids == NULL) 2685281806Srpaulo return -1; 2686281806Srpaulo 2687281806Srpaulo i = 0; 2688281806Srpaulo prio = 0; 2689281806Srpaulo ssid = wpa_s->conf->pssid[prio]; 2690281806Srpaulo while (ssid) { 2691281806Srpaulo if (!wpas_network_disabled(wpa_s, ssid)) { 2692281806Srpaulo if (ssid->scan_ssid && params.num_ssids < num_ssid) { 2693281806Srpaulo params.ssids[params.num_ssids].ssid = 2694281806Srpaulo ssid->ssid; 2695281806Srpaulo params.ssids[params.num_ssids].ssid_len = 2696281806Srpaulo ssid->ssid_len; 2697281806Srpaulo params.num_ssids++; 2698281806Srpaulo } 2699281806Srpaulo os_memcpy(params.filter_ssids[i].ssid, ssid->ssid, 2700281806Srpaulo ssid->ssid_len); 2701281806Srpaulo params.filter_ssids[i].ssid_len = ssid->ssid_len; 2702281806Srpaulo params.num_filter_ssids++; 2703281806Srpaulo i++; 2704281806Srpaulo if (i == num_match_ssid) 2705281806Srpaulo break; 2706281806Srpaulo } 2707281806Srpaulo if (ssid->pnext) 2708281806Srpaulo ssid = ssid->pnext; 2709281806Srpaulo else if (prio + 1 == wpa_s->conf->num_prio) 2710281806Srpaulo break; 2711281806Srpaulo else 2712281806Srpaulo ssid = wpa_s->conf->pssid[++prio]; 2713281806Srpaulo } 2714281806Srpaulo 2715281806Srpaulo if (wpa_s->conf->filter_rssi) 2716281806Srpaulo params.filter_rssi = wpa_s->conf->filter_rssi; 2717281806Srpaulo 2718337817Scy if (wpa_s->sched_scan_plans_num) { 2719337817Scy params.sched_scan_plans = wpa_s->sched_scan_plans; 2720337817Scy params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; 2721337817Scy } else { 2722337817Scy /* Set one scan plan that will run infinitely */ 2723337817Scy if (wpa_s->conf->sched_scan_interval) 2724337817Scy scan_plan.interval = wpa_s->conf->sched_scan_interval; 2725337817Scy else 2726337817Scy scan_plan.interval = 10; 2727281806Srpaulo 2728337817Scy scan_plan.iterations = 0; 2729337817Scy params.sched_scan_plans = &scan_plan; 2730337817Scy params.sched_scan_plans_num = 1; 2731337817Scy } 2732337817Scy 2733346981Scy params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay; 2734346981Scy 2735281806Srpaulo if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) { 2736281806Srpaulo wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels"); 2737281806Srpaulo params.freqs = wpa_s->manual_sched_scan_freqs; 2738281806Srpaulo } 2739281806Srpaulo 2740346981Scy if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) && 2741346981Scy wpa_s->wpa_state <= WPA_SCANNING) { 2742281806Srpaulo params.mac_addr_rand = 1; 2743281806Srpaulo if (wpa_s->mac_addr_pno) { 2744281806Srpaulo params.mac_addr = wpa_s->mac_addr_pno; 2745281806Srpaulo params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN; 2746281806Srpaulo } 2747281806Srpaulo } 2748281806Srpaulo 2749346981Scy wpa_scan_set_relative_rssi_params(wpa_s, ¶ms); 2750346981Scy 2751337817Scy ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms); 2752281806Srpaulo os_free(params.filter_ssids); 2753281806Srpaulo if (ret == 0) 2754281806Srpaulo wpa_s->pno = 1; 2755281806Srpaulo else 2756281806Srpaulo wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO"); 2757281806Srpaulo return ret; 2758281806Srpaulo} 2759281806Srpaulo 2760281806Srpaulo 2761281806Srpauloint wpas_stop_pno(struct wpa_supplicant *wpa_s) 2762281806Srpaulo{ 2763281806Srpaulo int ret = 0; 2764281806Srpaulo 2765281806Srpaulo if (!wpa_s->pno) 2766281806Srpaulo return 0; 2767281806Srpaulo 2768281806Srpaulo ret = wpa_supplicant_stop_sched_scan(wpa_s); 2769337817Scy wpa_s->sched_scan_stop_req = 1; 2770281806Srpaulo 2771281806Srpaulo wpa_s->pno = 0; 2772281806Srpaulo wpa_s->pno_sched_pending = 0; 2773281806Srpaulo 2774281806Srpaulo if (wpa_s->wpa_state == WPA_SCANNING) 2775281806Srpaulo wpa_supplicant_req_scan(wpa_s, 0, 0); 2776281806Srpaulo 2777281806Srpaulo return ret; 2778281806Srpaulo} 2779281806Srpaulo 2780281806Srpaulo 2781281806Srpaulovoid wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, 2782281806Srpaulo unsigned int type) 2783281806Srpaulo{ 2784281806Srpaulo type &= MAC_ADDR_RAND_ALL; 2785281806Srpaulo wpa_s->mac_addr_rand_enable &= ~type; 2786281806Srpaulo 2787281806Srpaulo if (type & MAC_ADDR_RAND_SCAN) { 2788281806Srpaulo os_free(wpa_s->mac_addr_scan); 2789281806Srpaulo wpa_s->mac_addr_scan = NULL; 2790281806Srpaulo } 2791281806Srpaulo 2792281806Srpaulo if (type & MAC_ADDR_RAND_SCHED_SCAN) { 2793281806Srpaulo os_free(wpa_s->mac_addr_sched_scan); 2794281806Srpaulo wpa_s->mac_addr_sched_scan = NULL; 2795281806Srpaulo } 2796281806Srpaulo 2797281806Srpaulo if (type & MAC_ADDR_RAND_PNO) { 2798281806Srpaulo os_free(wpa_s->mac_addr_pno); 2799281806Srpaulo wpa_s->mac_addr_pno = NULL; 2800281806Srpaulo } 2801281806Srpaulo} 2802281806Srpaulo 2803281806Srpaulo 2804281806Srpauloint wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, 2805281806Srpaulo unsigned int type, const u8 *addr, 2806281806Srpaulo const u8 *mask) 2807281806Srpaulo{ 2808281806Srpaulo u8 *tmp = NULL; 2809281806Srpaulo 2810346981Scy if ((wpa_s->mac_addr_rand_supported & type) != type ) { 2811346981Scy wpa_printf(MSG_INFO, 2812346981Scy "scan: MAC randomization type %u != supported=%u", 2813346981Scy type, wpa_s->mac_addr_rand_supported); 2814346981Scy return -1; 2815346981Scy } 2816346981Scy 2817281806Srpaulo wpas_mac_addr_rand_scan_clear(wpa_s, type); 2818281806Srpaulo 2819281806Srpaulo if (addr) { 2820281806Srpaulo tmp = os_malloc(2 * ETH_ALEN); 2821281806Srpaulo if (!tmp) 2822281806Srpaulo return -1; 2823281806Srpaulo os_memcpy(tmp, addr, ETH_ALEN); 2824281806Srpaulo os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN); 2825281806Srpaulo } 2826281806Srpaulo 2827281806Srpaulo if (type == MAC_ADDR_RAND_SCAN) { 2828281806Srpaulo wpa_s->mac_addr_scan = tmp; 2829281806Srpaulo } else if (type == MAC_ADDR_RAND_SCHED_SCAN) { 2830281806Srpaulo wpa_s->mac_addr_sched_scan = tmp; 2831281806Srpaulo } else if (type == MAC_ADDR_RAND_PNO) { 2832281806Srpaulo wpa_s->mac_addr_pno = tmp; 2833281806Srpaulo } else { 2834281806Srpaulo wpa_printf(MSG_INFO, 2835281806Srpaulo "scan: Invalid MAC randomization type=0x%x", 2836281806Srpaulo type); 2837281806Srpaulo os_free(tmp); 2838281806Srpaulo return -1; 2839281806Srpaulo } 2840281806Srpaulo 2841281806Srpaulo wpa_s->mac_addr_rand_enable |= type; 2842281806Srpaulo return 0; 2843281806Srpaulo} 2844337817Scy 2845337817Scy 2846337817Scyint wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s) 2847337817Scy{ 2848346981Scy struct wpa_radio_work *work; 2849346981Scy struct wpa_radio *radio = wpa_s->radio; 2850337817Scy 2851346981Scy dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) { 2852346981Scy if (work->wpa_s != wpa_s || !work->started || 2853346981Scy (os_strcmp(work->type, "scan") != 0 && 2854346981Scy os_strcmp(work->type, "p2p-scan") != 0)) 2855346981Scy continue; 2856337817Scy wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan"); 2857346981Scy return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie); 2858337817Scy } 2859337817Scy 2860346981Scy wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort"); 2861346981Scy return -1; 2862337817Scy} 2863337817Scy 2864337817Scy 2865337817Scyint wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd) 2866337817Scy{ 2867337817Scy struct sched_scan_plan *scan_plans = NULL; 2868337817Scy const char *token, *context = NULL; 2869337817Scy unsigned int num = 0; 2870337817Scy 2871337817Scy if (!cmd) 2872337817Scy return -1; 2873337817Scy 2874337817Scy if (!cmd[0]) { 2875337817Scy wpa_printf(MSG_DEBUG, "Clear sched scan plans"); 2876337817Scy os_free(wpa_s->sched_scan_plans); 2877337817Scy wpa_s->sched_scan_plans = NULL; 2878337817Scy wpa_s->sched_scan_plans_num = 0; 2879337817Scy return 0; 2880337817Scy } 2881337817Scy 2882337817Scy while ((token = cstr_token(cmd, " ", &context))) { 2883337817Scy int ret; 2884337817Scy struct sched_scan_plan *scan_plan, *n; 2885337817Scy 2886337817Scy n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans)); 2887337817Scy if (!n) 2888337817Scy goto fail; 2889337817Scy 2890337817Scy scan_plans = n; 2891337817Scy scan_plan = &scan_plans[num]; 2892337817Scy num++; 2893337817Scy 2894337817Scy ret = sscanf(token, "%u:%u", &scan_plan->interval, 2895337817Scy &scan_plan->iterations); 2896337817Scy if (ret <= 0 || ret > 2 || !scan_plan->interval) { 2897337817Scy wpa_printf(MSG_ERROR, 2898337817Scy "Invalid sched scan plan input: %s", token); 2899337817Scy goto fail; 2900337817Scy } 2901337817Scy 2902337817Scy if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) { 2903337817Scy wpa_printf(MSG_WARNING, 2904337817Scy "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)", 2905337817Scy num, scan_plan->interval, 2906337817Scy wpa_s->max_sched_scan_plan_interval); 2907337817Scy scan_plan->interval = 2908337817Scy wpa_s->max_sched_scan_plan_interval; 2909337817Scy } 2910337817Scy 2911337817Scy if (ret == 1) { 2912337817Scy scan_plan->iterations = 0; 2913337817Scy break; 2914337817Scy } 2915337817Scy 2916337817Scy if (!scan_plan->iterations) { 2917337817Scy wpa_printf(MSG_ERROR, 2918337817Scy "scan plan %u: Number of iterations cannot be zero", 2919337817Scy num); 2920337817Scy goto fail; 2921337817Scy } 2922337817Scy 2923337817Scy if (scan_plan->iterations > 2924337817Scy wpa_s->max_sched_scan_plan_iterations) { 2925337817Scy wpa_printf(MSG_WARNING, 2926337817Scy "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)", 2927337817Scy num, scan_plan->iterations, 2928337817Scy wpa_s->max_sched_scan_plan_iterations); 2929337817Scy scan_plan->iterations = 2930337817Scy wpa_s->max_sched_scan_plan_iterations; 2931337817Scy } 2932337817Scy 2933337817Scy wpa_printf(MSG_DEBUG, 2934337817Scy "scan plan %u: interval=%u iterations=%u", 2935337817Scy num, scan_plan->interval, scan_plan->iterations); 2936337817Scy } 2937337817Scy 2938337817Scy if (!scan_plans) { 2939337817Scy wpa_printf(MSG_ERROR, "Invalid scan plans entry"); 2940337817Scy goto fail; 2941337817Scy } 2942337817Scy 2943337817Scy if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) { 2944337817Scy wpa_printf(MSG_ERROR, 2945337817Scy "All scan plans but the last must specify a number of iterations"); 2946337817Scy goto fail; 2947337817Scy } 2948337817Scy 2949337817Scy wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u", 2950337817Scy num, scan_plans[num - 1].interval); 2951337817Scy 2952337817Scy if (num > wpa_s->max_sched_scan_plans) { 2953337817Scy wpa_printf(MSG_WARNING, 2954337817Scy "Too many scheduled scan plans (only %u supported)", 2955337817Scy wpa_s->max_sched_scan_plans); 2956337817Scy wpa_printf(MSG_WARNING, 2957337817Scy "Use only the first %u scan plans, and the last one (in infinite loop)", 2958337817Scy wpa_s->max_sched_scan_plans - 1); 2959337817Scy os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1], 2960337817Scy &scan_plans[num - 1], sizeof(*scan_plans)); 2961337817Scy num = wpa_s->max_sched_scan_plans; 2962337817Scy } 2963337817Scy 2964337817Scy os_free(wpa_s->sched_scan_plans); 2965337817Scy wpa_s->sched_scan_plans = scan_plans; 2966337817Scy wpa_s->sched_scan_plans_num = num; 2967337817Scy 2968337817Scy return 0; 2969337817Scy 2970337817Scyfail: 2971337817Scy os_free(scan_plans); 2972337817Scy wpa_printf(MSG_ERROR, "invalid scan plans list"); 2973337817Scy return -1; 2974337817Scy} 2975337817Scy 2976337817Scy 2977337817Scy/** 2978337817Scy * wpas_scan_reset_sched_scan - Reset sched_scan state 2979337817Scy * @wpa_s: Pointer to wpa_supplicant data 2980337817Scy * 2981337817Scy * This function is used to cancel a running scheduled scan and to reset an 2982337817Scy * internal scan state to continue with a regular scan on the following 2983337817Scy * wpa_supplicant_req_scan() calls. 2984337817Scy */ 2985337817Scyvoid wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s) 2986337817Scy{ 2987337817Scy wpa_s->normal_scans = 0; 2988337817Scy if (wpa_s->sched_scanning) { 2989337817Scy wpa_s->sched_scan_timed_out = 0; 2990337817Scy wpa_s->prev_sched_ssid = NULL; 2991337817Scy wpa_supplicant_cancel_sched_scan(wpa_s); 2992337817Scy } 2993337817Scy} 2994337817Scy 2995337817Scy 2996337817Scyvoid wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s) 2997337817Scy{ 2998337817Scy /* simulate timeout to restart the sched scan */ 2999337817Scy wpa_s->sched_scan_timed_out = 1; 3000337817Scy wpa_s->prev_sched_ssid = NULL; 3001337817Scy wpa_supplicant_cancel_sched_scan(wpa_s); 3002337817Scy} 3003