2 * WPA Supplicant - Scanning
3 * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/wpa_ctrl.h"
16 #include "wpa_supplicant_i.h"
18 #include "wps_supplicant.h"
19 #include "p2p_supplicant.h"
21 #include "hs20_supplicant.h"
28 static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
30 struct wpa_ssid *ssid;
31 union wpa_event_data data;
33 ssid = wpa_supplicant_get_ssid(wpa_s);
37 if (wpa_s->current_ssid == NULL) {
38 wpa_s->current_ssid = ssid;
39 wpas_notify_network_changed(wpa_s);
41 wpa_supplicant_initiate_eapol(wpa_s);
42 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured "
43 "network - generating associated event");
44 os_memset(&data, 0, sizeof(data));
45 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
50 static int wpas_wps_in_use(struct wpa_supplicant *wpa_s,
51 enum wps_request_type *req_type)
53 struct wpa_ssid *ssid;
56 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
57 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
61 *req_type = wpas_wps_get_req_type(ssid);
62 if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1"))
67 if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
68 !wpa_s->conf->p2p_disabled) {
69 wpa_s->wps->dev.p2p = 1;
72 *req_type = WPS_REQ_ENROLLEE_INFO;
75 #endif /* CONFIG_P2P */
79 #endif /* CONFIG_WPS */
83 * wpa_supplicant_enabled_networks - Check whether there are enabled networks
84 * @wpa_s: Pointer to wpa_supplicant data
85 * Returns: 0 if no networks are enabled, >0 if networks are enabled
87 * This function is used to figure out whether any networks (or Interworking
88 * with enabled credentials and auto_interworking) are present in the current
91 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
93 struct wpa_ssid *ssid = wpa_s->conf->ssid;
94 int count = 0, disabled = 0;
97 return 0; /* no normal network profiles on p2p_mgmt interface */
100 if (!wpas_network_disabled(wpa_s, ssid))
106 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
107 wpa_s->conf->auto_interworking)
109 if (count == 0 && disabled > 0) {
110 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
111 "networks)", disabled);
117 static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
118 struct wpa_ssid *ssid)
121 if (!wpas_network_disabled(wpa_s, ssid))
126 /* ap_scan=2 mode - try to associate with each SSID. */
128 wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
129 "end of scan list - go back to beginning");
130 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
131 wpa_supplicant_req_scan(wpa_s, 0, 0);
135 /* Continue from the next SSID on the next attempt. */
136 wpa_s->prev_scan_ssid = ssid;
138 /* Start from the beginning of the SSID list. */
139 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
141 wpa_supplicant_associate(wpa_s, NULL, ssid);
145 static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
147 struct wpa_supplicant *wpa_s = work->wpa_s;
148 struct wpa_driver_scan_params *params = work->ctx;
152 if (!work->started) {
153 wpa_scan_free_params(params);
156 wpa_supplicant_notify_scanning(wpa_s, 0);
157 wpas_notify_scan_done(wpa_s, 0);
158 wpa_s->scan_work = NULL;
162 if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
163 wpa_msg(wpa_s, MSG_INFO,
164 "Failed to assign random MAC address for a scan");
165 wpa_scan_free_params(params);
166 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
167 radio_work_done(work);
171 wpa_supplicant_notify_scanning(wpa_s, 1);
173 if (wpa_s->clear_driver_scan_cache) {
174 wpa_printf(MSG_DEBUG,
175 "Request driver to clear scan cache due to local BSS flush");
176 params->only_new_results = 1;
178 ret = wpa_drv_scan(wpa_s, params);
179 wpa_scan_free_params(params);
182 int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ;
184 if (wpa_s->disconnected)
187 wpa_supplicant_notify_scanning(wpa_s, 0);
188 wpas_notify_scan_done(wpa_s, 0);
189 if (wpa_s->wpa_state == WPA_SCANNING)
190 wpa_supplicant_set_state(wpa_s,
191 wpa_s->scan_prev_wpa_state);
192 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s",
193 ret, retry ? " retry=1" : "");
194 radio_work_done(work);
197 /* Restore scan_req since we will try to scan again */
198 wpa_s->scan_req = wpa_s->last_scan_req;
199 wpa_supplicant_req_scan(wpa_s, 1, 0);
204 os_get_reltime(&wpa_s->scan_trigger_time);
206 wpa_s->normal_scans++;
207 wpa_s->own_scan_requested = 1;
208 wpa_s->clear_driver_scan_cache = 0;
209 wpa_s->scan_work = work;
214 * wpa_supplicant_trigger_scan - Request driver to start a scan
215 * @wpa_s: Pointer to wpa_supplicant data
216 * @params: Scan parameters
217 * Returns: 0 on success, -1 on failure
219 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
220 struct wpa_driver_scan_params *params)
222 struct wpa_driver_scan_params *ctx;
224 if (wpa_s->scan_work) {
225 wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
229 ctx = wpa_scan_clone_params(params);
231 radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
233 wpa_scan_free_params(ctx);
234 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
243 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
245 struct wpa_supplicant *wpa_s = eloop_ctx;
247 wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");
249 if (wpa_supplicant_req_sched_scan(wpa_s))
250 wpa_supplicant_req_scan(wpa_s, 0, 0);
255 wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
257 struct wpa_supplicant *wpa_s = eloop_ctx;
259 wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");
261 wpa_s->sched_scan_timed_out = 1;
262 wpa_supplicant_cancel_sched_scan(wpa_s);
267 wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
268 struct wpa_driver_scan_params *params)
272 wpa_supplicant_notify_scanning(wpa_s, 1);
273 ret = wpa_drv_sched_scan(wpa_s, params);
275 wpa_supplicant_notify_scanning(wpa_s, 0);
277 wpa_s->sched_scanning = 1;
283 static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
287 ret = wpa_drv_stop_sched_scan(wpa_s);
289 wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!");
290 /* TODO: what to do if stopping fails? */
298 static struct wpa_driver_scan_filter *
299 wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids)
301 struct wpa_driver_scan_filter *ssids;
302 struct wpa_ssid *ssid;
306 if (!conf->filter_ssids)
309 for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) {
310 if (ssid->ssid && ssid->ssid_len)
315 ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter));
319 for (ssid = conf->ssid; ssid; ssid = ssid->next) {
320 if (!ssid->ssid || !ssid->ssid_len)
322 os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len);
323 ssids[*num_ssids].ssid_len = ssid->ssid_len;
331 static void wpa_supplicant_optimize_freqs(
332 struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params)
335 if (params->freqs == NULL && wpa_s->p2p_in_provisioning &&
337 /* Optimize provisioning state scan based on GO information */
338 if (wpa_s->p2p_in_provisioning < 5 &&
339 wpa_s->go_params->freq > 0) {
340 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
341 "preferred frequency %d MHz",
342 wpa_s->go_params->freq);
343 params->freqs = os_calloc(2, sizeof(int));
345 params->freqs[0] = wpa_s->go_params->freq;
346 } else if (wpa_s->p2p_in_provisioning < 8 &&
347 wpa_s->go_params->freq_list[0]) {
348 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
350 int_array_concat(¶ms->freqs,
351 wpa_s->go_params->freq_list);
353 int_array_sort_unique(params->freqs);
355 wpa_s->p2p_in_provisioning++;
358 if (params->freqs == NULL && wpa_s->p2p_in_invitation) {
360 * Optimize scan based on GO information during persistent
363 if (wpa_s->p2p_in_invitation < 5 &&
364 wpa_s->p2p_invite_go_freq > 0) {
365 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation",
366 wpa_s->p2p_invite_go_freq);
367 params->freqs = os_calloc(2, sizeof(int));
369 params->freqs[0] = wpa_s->p2p_invite_go_freq;
371 wpa_s->p2p_in_invitation++;
372 if (wpa_s->p2p_in_invitation > 20) {
374 * This should not really happen since the variable is
375 * cleared on group removal, but if it does happen, make
376 * sure we do not get stuck in special invitation scan
379 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation");
380 wpa_s->p2p_in_invitation = 0;
383 #endif /* CONFIG_P2P */
386 if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
388 * Optimize post-provisioning scan based on channel used
389 * during provisioning.
391 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
392 "that was used during provisioning", wpa_s->wps_freq);
393 params->freqs = os_calloc(2, sizeof(int));
395 params->freqs[0] = wpa_s->wps_freq;
397 } else if (wpa_s->after_wps)
400 if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
402 /* Optimize provisioning scan based on already known channel */
403 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",
405 params->freqs = os_calloc(2, sizeof(int));
407 params->freqs[0] = wpa_s->wps_freq;
408 wpa_s->known_wps_freq = 0; /* only do this once */
410 #endif /* CONFIG_WPS */
414 #ifdef CONFIG_INTERWORKING
415 static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
418 wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
419 wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
421 wpabuf_put_u8(buf, wpa_s->conf->access_network_type);
423 if (!is_zero_ether_addr(wpa_s->conf->hessid))
424 wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN);
426 #endif /* CONFIG_INTERWORKING */
429 static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
431 struct wpabuf *extra_ie = NULL;
436 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
437 #endif /* CONFIG_WPS */
440 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
441 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
443 #endif /* CONFIG_P2P */
444 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
446 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
448 if (ext_capab_len > 0 &&
449 wpabuf_resize(&extra_ie, ext_capab_len) == 0)
450 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
452 #ifdef CONFIG_INTERWORKING
453 if (wpa_s->conf->interworking &&
454 wpabuf_resize(&extra_ie, 100) == 0)
455 wpas_add_interworking_elements(wpa_s, extra_ie);
456 #endif /* CONFIG_INTERWORKING */
459 wps = wpas_wps_in_use(wpa_s, &req_type);
462 struct wpabuf *wps_ie;
463 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
466 wpa_s->wps->uuid, req_type,
469 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
470 wpabuf_put_buf(extra_ie, wps_ie);
477 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
478 if (wpabuf_resize(&extra_ie, ielen) == 0)
479 wpas_p2p_scan_ie(wpa_s, extra_ie);
481 #endif /* CONFIG_P2P */
483 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
485 #endif /* CONFIG_WPS */
488 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
489 wpas_hs20_add_indication(extra_ie, -1);
490 #endif /* CONFIG_HS20 */
493 if (wpa_s->fst_ies &&
494 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
495 wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
496 #endif /* CONFIG_FST */
499 /* Send cellular capabilities for potential MBO STAs */
500 if (wpabuf_resize(&extra_ie, 9) == 0)
501 wpas_mbo_scan_ie(wpa_s, extra_ie);
502 #endif /* CONFIG_MBO */
504 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
505 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
507 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
508 wpabuf_put_buf(extra_ie, buf);
518 * Check whether there are any enabled networks or credentials that could be
519 * used for a non-P2P connection.
521 static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
523 struct wpa_ssid *ssid;
525 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
526 if (wpas_network_disabled(wpa_s, ssid))
528 if (!ssid->p2p_group)
532 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
533 wpa_s->conf->auto_interworking)
539 #endif /* CONFIG_P2P */
542 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
543 enum hostapd_hw_mode band,
544 struct wpa_driver_scan_params *params)
546 /* Include only supported channels for the specified band */
547 struct hostapd_hw_modes *mode;
550 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
552 /* No channels supported in this band - use empty list */
553 params->freqs = os_zalloc(sizeof(int));
557 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
558 if (params->freqs == NULL)
560 for (count = 0, i = 0; i < mode->num_channels; i++) {
561 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
563 params->freqs[count++] = mode->channels[i].freq;
568 static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
569 struct wpa_driver_scan_params *params)
571 if (wpa_s->hw.modes == NULL)
572 return; /* unknown what channels the driver supports */
574 return; /* already using a limited channel set */
575 if (wpa_s->setband == WPA_SETBAND_5G)
576 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A,
578 else if (wpa_s->setband == WPA_SETBAND_2G)
579 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G,
584 static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
585 struct wpa_driver_scan_params *params,
589 struct wpa_ssid *ssid;
591 for (i = 0; i < wpa_s->scan_id_count; i++) {
594 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
595 if (!ssid || !ssid->scan_ssid)
598 for (j = 0; j < params->num_ssids; j++) {
599 if (params->ssids[j].ssid_len == ssid->ssid_len &&
600 params->ssids[j].ssid &&
601 os_memcmp(params->ssids[j].ssid, ssid->ssid,
602 ssid->ssid_len) == 0)
605 if (j < params->num_ssids)
606 continue; /* already in the list */
608 if (params->num_ssids + 1 > max_ssids) {
609 wpa_printf(MSG_DEBUG,
610 "Over max scan SSIDs for manual request");
614 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
615 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
616 params->ssids[params->num_ssids].ssid = ssid->ssid;
617 params->ssids[params->num_ssids].ssid_len = ssid->ssid_len;
621 wpa_s->scan_id_count = 0;
625 static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
626 struct wpa_driver_scan_params *params,
631 if (wpa_s->ssids_from_scan_req == NULL ||
632 wpa_s->num_ssids_from_scan_req == 0)
635 if (wpa_s->num_ssids_from_scan_req > max_ssids) {
636 wpa_s->num_ssids_from_scan_req = max_ssids;
637 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
638 (unsigned int) max_ssids);
641 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
642 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
643 params->ssids[i].ssid_len =
644 wpa_s->ssids_from_scan_req[i].ssid_len;
645 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
646 params->ssids[i].ssid,
647 params->ssids[i].ssid_len);
650 params->num_ssids = wpa_s->num_ssids_from_scan_req;
651 wpa_s->num_ssids_from_scan_req = 0;
656 static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
658 struct wpa_supplicant *wpa_s = eloop_ctx;
659 struct wpa_ssid *ssid;
660 int ret, p2p_in_prog;
661 struct wpabuf *extra_ie = NULL;
662 struct wpa_driver_scan_params params;
663 struct wpa_driver_scan_params *scan_params;
665 int connect_without_scan = 0;
667 if (wpa_s->pno || wpa_s->pno_sched_pending) {
668 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress");
672 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
673 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
677 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
678 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
679 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
683 if (wpa_s->scanning) {
685 * If we are already in scanning state, we shall reschedule the
686 * the incoming scan request.
688 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
689 wpa_supplicant_req_scan(wpa_s, 1, 0);
693 if (!wpa_supplicant_enabled_networks(wpa_s) &&
694 wpa_s->scan_req == NORMAL_SCAN_REQ) {
695 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
696 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
700 if (wpa_s->conf->ap_scan != 0 &&
701 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
702 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
703 "overriding ap_scan configuration");
704 wpa_s->conf->ap_scan = 0;
705 wpas_notify_ap_scan_changed(wpa_s);
708 if (wpa_s->conf->ap_scan == 0) {
709 wpa_supplicant_gen_assoc_event(wpa_s);
714 if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
715 wpa_s->connect_without_scan) {
716 connect_without_scan = 1;
717 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
718 if (ssid == wpa_s->connect_without_scan)
723 p2p_in_prog = wpas_p2p_in_progress(wpa_s);
724 if (p2p_in_prog && p2p_in_prog != 2 &&
726 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
727 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
728 wpa_supplicant_req_scan(wpa_s, 5, 0);
732 if (wpa_s->conf->ap_scan == 2)
735 max_ssids = wpa_s->max_scan_ssids;
736 if (max_ssids > WPAS_MAX_SCAN_SSIDS)
737 max_ssids = WPAS_MAX_SCAN_SSIDS;
740 wpa_s->last_scan_req = wpa_s->scan_req;
741 wpa_s->scan_req = NORMAL_SCAN_REQ;
743 if (connect_without_scan) {
744 wpa_s->connect_without_scan = NULL;
746 wpa_printf(MSG_DEBUG, "Start a pre-selected network "
747 "without scan step");
748 wpa_supplicant_associate(wpa_s, NULL, ssid);
753 os_memset(¶ms, 0, sizeof(params));
755 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
756 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
757 wpa_s->wpa_state == WPA_INACTIVE)
758 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
761 * If autoscan has set its own scanning parameters
763 if (wpa_s->autoscan_params != NULL) {
764 scan_params = wpa_s->autoscan_params;
768 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
769 wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) {
770 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
775 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
776 wpa_s->go_params && !wpa_s->conf->passive_scan) {
777 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
778 wpa_s->p2p_in_provisioning,
779 wpa_s->show_group_started);
780 params.ssids[0].ssid = wpa_s->go_params->ssid;
781 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
782 params.num_ssids = 1;
786 if (wpa_s->p2p_in_invitation) {
787 if (wpa_s->current_ssid) {
788 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
789 params.ssids[0].ssid = wpa_s->current_ssid->ssid;
790 params.ssids[0].ssid_len =
791 wpa_s->current_ssid->ssid_len;
792 params.num_ssids = 1;
794 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
798 #endif /* CONFIG_P2P */
800 /* Find the starting point from which to continue scanning */
801 ssid = wpa_s->conf->ssid;
802 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
804 if (ssid == wpa_s->prev_scan_ssid) {
812 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
815 #endif /* CONFIG_AP */
816 wpa_s->conf->ap_scan == 2) {
817 wpa_s->connect_without_scan = NULL;
818 wpa_s->prev_scan_wildcard = 0;
819 wpa_supplicant_assoc_try(wpa_s, ssid);
821 } else if (wpa_s->conf->ap_scan == 2) {
823 * User-initiated scan request in ap_scan == 2; scan with
827 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
829 * Perform single-channel single-SSID scan for
830 * reassociate-to-same-BSS operation.
833 ssid = wpa_s->current_ssid;
834 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
835 ssid->ssid, ssid->ssid_len);
836 params.ssids[0].ssid = ssid->ssid;
837 params.ssids[0].ssid_len = ssid->ssid_len;
838 params.num_ssids = 1;
841 * Allocate memory for frequency array, allocate one extra
842 * slot for the zero-terminator.
844 params.freqs = os_malloc(sizeof(int) * 2);
846 params.freqs[0] = wpa_s->assoc_freq;
851 * Reset the reattach flag so that we fall back to full scan if
856 struct wpa_ssid *start = ssid, *tssid;
858 if (ssid == NULL && max_ssids > 1)
859 ssid = wpa_s->conf->ssid;
861 if (!wpas_network_disabled(wpa_s, ssid) &&
863 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
864 ssid->ssid, ssid->ssid_len);
865 params.ssids[params.num_ssids].ssid =
867 params.ssids[params.num_ssids].ssid_len =
870 if (params.num_ssids + 1 >= max_ssids)
876 if (ssid == NULL && max_ssids > 1 &&
877 start != wpa_s->conf->ssid)
878 ssid = wpa_s->conf->ssid;
881 if (wpa_s->scan_id_count &&
882 wpa_s->last_scan_req == MANUAL_SCAN_REQ)
883 wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids);
885 for (tssid = wpa_s->conf->ssid;
886 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
887 tssid = tssid->next) {
888 if (wpas_network_disabled(wpa_s, tssid))
890 if ((params.freqs || !freqs_set) && tssid->scan_freq) {
891 int_array_concat(¶ms.freqs,
894 os_free(params.freqs);
899 int_array_sort_unique(params.freqs);
902 if (ssid && max_ssids == 1) {
904 * If the driver is limited to 1 SSID at a time interleave
905 * wildcard SSID scans with specific SSID scans to avoid
906 * waiting a long time for a wildcard scan.
908 if (!wpa_s->prev_scan_wildcard) {
909 params.ssids[0].ssid = NULL;
910 params.ssids[0].ssid_len = 0;
911 wpa_s->prev_scan_wildcard = 1;
912 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
913 "wildcard SSID (Interleave with specific)");
915 wpa_s->prev_scan_ssid = ssid;
916 wpa_s->prev_scan_wildcard = 0;
917 wpa_dbg(wpa_s, MSG_DEBUG,
918 "Starting AP scan for specific SSID: %s",
919 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
924 wpa_s->prev_scan_ssid = ssid;
925 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
928 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
929 wpa_s->manual_scan_passive && params.num_ssids == 0) {
930 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
931 } else if (wpa_s->conf->passive_scan) {
932 wpa_dbg(wpa_s, MSG_DEBUG,
933 "Use passive scan based on configuration");
935 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
937 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
942 wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
943 extra_ie = wpa_supplicant_extra_ies(wpa_s);
945 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
946 wpa_s->manual_scan_only_new) {
947 wpa_printf(MSG_DEBUG,
948 "Request driver to clear scan cache due to manual only_new=1 scan");
949 params.only_new_results = 1;
952 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
953 wpa_s->manual_scan_freqs) {
954 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
955 params.freqs = wpa_s->manual_scan_freqs;
956 wpa_s->manual_scan_freqs = NULL;
959 if (params.freqs == NULL && wpa_s->next_scan_freqs) {
960 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
961 "generated frequency list");
962 params.freqs = wpa_s->next_scan_freqs;
964 os_free(wpa_s->next_scan_freqs);
965 wpa_s->next_scan_freqs = NULL;
966 wpa_setband_scan_freqs(wpa_s, ¶ms);
968 /* See if user specified frequencies. If so, scan only those. */
969 if (wpa_s->conf->freq_list && !params.freqs) {
970 wpa_dbg(wpa_s, MSG_DEBUG,
971 "Optimize scan based on conf->freq_list");
972 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
975 /* Use current associated channel? */
976 if (wpa_s->conf->scan_cur_freq && !params.freqs) {
977 unsigned int num = wpa_s->num_multichan_concurrent;
979 params.freqs = os_calloc(num + 1, sizeof(int));
981 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
983 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
984 "current operating channels since "
985 "scan_cur_freq is enabled");
987 os_free(params.freqs);
993 params.filter_ssids = wpa_supplicant_build_filter_ssids(
994 wpa_s->conf, ¶ms.num_filter_ssids);
996 params.extra_ies = wpabuf_head(extra_ie);
997 params.extra_ies_len = wpabuf_len(extra_ie);
1001 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
1002 (wpa_s->show_group_started && wpa_s->go_params)) {
1004 * The interface may not yet be in P2P mode, so we have to
1005 * explicitly request P2P probe to disable CCK rates.
1007 params.p2p_probe = 1;
1009 #endif /* CONFIG_P2P */
1011 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) {
1012 params.mac_addr_rand = 1;
1013 if (wpa_s->mac_addr_scan) {
1014 params.mac_addr = wpa_s->mac_addr_scan;
1015 params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN;
1019 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
1020 struct wpa_bss *bss;
1022 params.bssid = wpa_s->next_scan_bssid;
1023 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
1024 if (bss && bss->ssid_len && params.num_ssids == 1 &&
1025 params.ssids[0].ssid_len == 0) {
1026 params.ssids[0].ssid = bss->ssid;
1027 params.ssids[0].ssid_len = bss->ssid_len;
1028 wpa_dbg(wpa_s, MSG_DEBUG,
1029 "Scan a previously specified BSSID " MACSTR
1031 MAC2STR(params.bssid),
1032 wpa_ssid_txt(bss->ssid, bss->ssid_len));
1034 wpa_dbg(wpa_s, MSG_DEBUG,
1035 "Scan a previously specified BSSID " MACSTR,
1036 MAC2STR(params.bssid));
1040 scan_params = ¶ms;
1045 * If the driver does not support multi-channel concurrency and a
1046 * virtual interface that shares the same radio with the wpa_s interface
1047 * is operating there may not be need to scan other channels apart from
1048 * the current operating channel on the other virtual interface. Filter
1049 * out other channels in case we are trying to find a connection for a
1050 * station interface when we are not configured to prefer station
1051 * connection and a concurrent operation is already in process.
1053 if (wpa_s->scan_for_connection &&
1054 wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
1055 !scan_params->freqs && !params.freqs &&
1056 wpas_is_p2p_prioritized(wpa_s) &&
1057 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
1058 non_p2p_network_enabled(wpa_s)) {
1059 unsigned int num = wpa_s->num_multichan_concurrent;
1061 params.freqs = os_calloc(num + 1, sizeof(int));
1063 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1064 if (num > 0 && num == wpa_s->num_multichan_concurrent) {
1065 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
1067 os_free(params.freqs);
1068 params.freqs = NULL;
1072 #endif /* CONFIG_P2P */
1074 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
1076 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
1077 !wpa_s->manual_scan_freqs) {
1078 /* Restore manual_scan_freqs for the next attempt */
1079 wpa_s->manual_scan_freqs = params.freqs;
1080 params.freqs = NULL;
1083 wpabuf_free(extra_ie);
1084 os_free(params.freqs);
1085 os_free(params.filter_ssids);
1088 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
1089 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
1090 wpa_supplicant_set_state(wpa_s,
1091 wpa_s->scan_prev_wpa_state);
1092 /* Restore scan_req since we will try to scan again */
1093 wpa_s->scan_req = wpa_s->last_scan_req;
1094 wpa_supplicant_req_scan(wpa_s, 1, 0);
1096 wpa_s->scan_for_connection = 0;
1097 #ifdef CONFIG_INTERWORKING
1098 wpa_s->interworking_fast_assoc_tried = 0;
1099 #endif /* CONFIG_INTERWORKING */
1101 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
1106 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
1108 struct os_reltime remaining, new_int;
1111 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
1116 if (cancelled && os_reltime_before(&remaining, &new_int)) {
1117 new_int.sec = remaining.sec;
1118 new_int.usec = remaining.usec;
1122 eloop_register_timeout(new_int.sec, new_int.usec,
1123 wpa_supplicant_scan, wpa_s, NULL);
1125 wpa_s->scan_interval = sec;
1130 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1131 * @wpa_s: Pointer to wpa_supplicant data
1132 * @sec: Number of seconds after which to scan
1133 * @usec: Number of microseconds after which to scan
1135 * This function is used to schedule a scan for neighboring access points after
1136 * the specified time.
1138 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
1142 if (wpa_s->p2p_mgmt) {
1143 wpa_dbg(wpa_s, MSG_DEBUG,
1144 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1149 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
1152 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
1154 } else if (res == 0) {
1155 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1158 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
1160 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
1166 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1167 * @wpa_s: Pointer to wpa_supplicant data
1168 * @sec: Number of seconds after which to scan
1169 * @usec: Number of microseconds after which to scan
1170 * Returns: 0 on success or -1 otherwise
1172 * This function is used to schedule periodic scans for neighboring
1173 * access points after the specified time.
1175 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
1178 if (!wpa_s->sched_scan_supported)
1181 eloop_register_timeout(sec, usec,
1182 wpa_supplicant_delayed_sched_scan_timeout,
1190 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1191 * @wpa_s: Pointer to wpa_supplicant data
1192 * Returns: 0 is sched_scan was started or -1 otherwise
1194 * This function is used to schedule periodic scans for neighboring
1195 * access points repeating the scan continuously.
1197 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
1199 struct wpa_driver_scan_params params;
1200 struct wpa_driver_scan_params *scan_params;
1201 enum wpa_states prev_state;
1202 struct wpa_ssid *ssid = NULL;
1203 struct wpabuf *extra_ie = NULL;
1205 unsigned int max_sched_scan_ssids;
1208 struct sched_scan_plan scan_plan;
1210 if (!wpa_s->sched_scan_supported)
1213 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
1214 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
1216 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
1217 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
1220 if (wpa_s->sched_scanning) {
1221 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
1226 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1227 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
1228 /* Use wildcard SSID to find this network */
1230 } else if (!wpas_network_disabled(wpa_s, ssid) &&
1235 if (!wpas_network_disabled(wpa_s, ssid) &&
1236 ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1238 * Normal scan is more reliable and faster for WPS
1239 * operations and since these are for short periods of
1240 * time, the benefit of trying to use sched_scan would
1243 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1244 "sched_scan for WPS");
1247 #endif /* CONFIG_WPS */
1252 if (wpa_s->normal_scans < 3 &&
1253 (need_ssids <= wpa_s->max_scan_ssids ||
1254 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
1256 * When normal scan can speed up operations, use that for the
1257 * first operations before starting the sched_scan to allow
1258 * user space sleep more. We do this only if the normal scan
1259 * has functionality that is suitable for this or if the
1260 * sched_scan does not have better support for multiple SSIDs.
1262 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1263 "sched_scan for initial scans (normal_scans=%d)",
1264 wpa_s->normal_scans);
1268 os_memset(¶ms, 0, sizeof(params));
1270 /* If we can't allocate space for the filters, we just don't filter */
1271 params.filter_ssids = os_calloc(wpa_s->max_match_sets,
1272 sizeof(struct wpa_driver_scan_filter));
1274 prev_state = wpa_s->wpa_state;
1275 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1276 wpa_s->wpa_state == WPA_INACTIVE)
1277 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1279 if (wpa_s->autoscan_params != NULL) {
1280 scan_params = wpa_s->autoscan_params;
1284 /* Find the starting point from which to continue scanning */
1285 ssid = wpa_s->conf->ssid;
1286 if (wpa_s->prev_sched_ssid) {
1288 if (ssid == wpa_s->prev_sched_ssid) {
1296 if (!ssid || !wpa_s->prev_sched_ssid) {
1297 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
1298 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1299 wpa_s->first_sched_scan = 1;
1300 ssid = wpa_s->conf->ssid;
1301 wpa_s->prev_sched_ssid = ssid;
1305 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
1310 if (wpas_network_disabled(wpa_s, ssid))
1313 if (params.num_filter_ssids < wpa_s->max_match_sets &&
1314 params.filter_ssids && ssid->ssid && ssid->ssid_len) {
1315 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
1316 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1317 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
1318 ssid->ssid, ssid->ssid_len);
1319 params.filter_ssids[params.num_filter_ssids].ssid_len =
1321 params.num_filter_ssids++;
1322 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
1324 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
1325 "filter for sched_scan - drop filter");
1326 os_free(params.filter_ssids);
1327 params.filter_ssids = NULL;
1328 params.num_filter_ssids = 0;
1331 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
1332 if (params.num_ssids == max_sched_scan_ssids)
1333 break; /* only room for broadcast SSID */
1334 wpa_dbg(wpa_s, MSG_DEBUG,
1335 "add to active scan ssid: %s",
1336 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1337 params.ssids[params.num_ssids].ssid =
1339 params.ssids[params.num_ssids].ssid_len =
1342 if (params.num_ssids >= max_sched_scan_ssids) {
1343 wpa_s->prev_sched_ssid = ssid;
1347 (wpas_network_disabled(wpa_s, ssid) ||
1354 wpa_s->prev_sched_ssid = ssid;
1358 if (params.num_filter_ssids == 0) {
1359 os_free(params.filter_ssids);
1360 params.filter_ssids = NULL;
1363 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1365 params.extra_ies = wpabuf_head(extra_ie);
1366 params.extra_ies_len = wpabuf_len(extra_ie);
1369 if (wpa_s->conf->filter_rssi)
1370 params.filter_rssi = wpa_s->conf->filter_rssi;
1372 /* See if user specified frequencies. If so, scan only those. */
1373 if (wpa_s->conf->freq_list && !params.freqs) {
1374 wpa_dbg(wpa_s, MSG_DEBUG,
1375 "Optimize scan based on conf->freq_list");
1376 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
1379 scan_params = ¶ms;
1382 wpa_s->sched_scan_timed_out = 0;
1385 * We cannot support multiple scan plans if the scan request includes
1386 * too many SSID's, so in this case use only the last scan plan and make
1387 * it run infinitely. It will be stopped by the timeout.
1389 if (wpa_s->sched_scan_plans_num == 1 ||
1390 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
1391 params.sched_scan_plans = wpa_s->sched_scan_plans;
1392 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
1393 } else if (wpa_s->sched_scan_plans_num > 1) {
1394 wpa_dbg(wpa_s, MSG_DEBUG,
1395 "Too many SSIDs. Default to using single scheduled_scan plan");
1396 params.sched_scan_plans =
1397 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
1399 params.sched_scan_plans_num = 1;
1401 if (wpa_s->conf->sched_scan_interval)
1402 scan_plan.interval = wpa_s->conf->sched_scan_interval;
1404 scan_plan.interval = 10;
1406 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
1407 wpa_printf(MSG_WARNING,
1408 "Scan interval too long(%u), use the maximum allowed(%u)",
1410 wpa_s->max_sched_scan_plan_interval);
1411 scan_plan.interval =
1412 wpa_s->max_sched_scan_plan_interval;
1415 scan_plan.iterations = 0;
1416 params.sched_scan_plans = &scan_plan;
1417 params.sched_scan_plans_num = 1;
1420 if (ssid || !wpa_s->first_sched_scan) {
1421 wpa_dbg(wpa_s, MSG_DEBUG,
1422 "Starting sched scan: interval %u timeout %d",
1423 params.sched_scan_plans[0].interval,
1424 wpa_s->sched_scan_timeout);
1426 wpa_dbg(wpa_s, MSG_DEBUG, "Starting sched scan (no timeout)");
1429 wpa_setband_scan_freqs(wpa_s, scan_params);
1431 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) {
1432 params.mac_addr_rand = 1;
1433 if (wpa_s->mac_addr_sched_scan) {
1434 params.mac_addr = wpa_s->mac_addr_sched_scan;
1435 params.mac_addr_mask = wpa_s->mac_addr_sched_scan +
1440 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
1441 wpabuf_free(extra_ie);
1442 os_free(params.filter_ssids);
1444 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
1445 if (prev_state != wpa_s->wpa_state)
1446 wpa_supplicant_set_state(wpa_s, prev_state);
1450 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1451 if (ssid || !wpa_s->first_sched_scan) {
1452 wpa_s->sched_scan_timed_out = 0;
1453 eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
1454 wpa_supplicant_sched_scan_timeout,
1456 wpa_s->first_sched_scan = 0;
1457 wpa_s->sched_scan_timeout /= 2;
1458 params.sched_scan_plans[0].interval *= 2;
1459 if ((unsigned int) wpa_s->sched_scan_timeout <
1460 params.sched_scan_plans[0].interval ||
1461 params.sched_scan_plans[0].interval >
1462 wpa_s->max_sched_scan_plan_interval) {
1463 params.sched_scan_plans[0].interval = 10;
1464 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1468 /* If there is no more ssids, start next time from the beginning */
1470 wpa_s->prev_sched_ssid = NULL;
1477 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1478 * @wpa_s: Pointer to wpa_supplicant data
1480 * This function is used to cancel a scan request scheduled with
1481 * wpa_supplicant_req_scan().
1483 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
1485 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
1486 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
1491 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1492 * @wpa_s: Pointer to wpa_supplicant data
1494 * This function is used to stop a delayed scheduled scan.
1496 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
1498 if (!wpa_s->sched_scan_supported)
1501 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
1502 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
1508 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1509 * @wpa_s: Pointer to wpa_supplicant data
1511 * This function is used to stop a periodic scheduled scan.
1513 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
1515 if (!wpa_s->sched_scanning)
1518 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
1519 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
1520 wpa_supplicant_stop_sched_scan(wpa_s);
1525 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1526 * @wpa_s: Pointer to wpa_supplicant data
1527 * @scanning: Whether scanning is currently in progress
1529 * This function is to generate scanning notifycations. It is called whenever
1530 * there may have been a change in scanning (scan started, completed, stopped).
1531 * wpas_notify_scanning() is called whenever the scanning state changed from the
1532 * previously notified state.
1534 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
1537 if (wpa_s->scanning != scanning) {
1538 wpa_s->scanning = scanning;
1539 wpas_notify_scanning(wpa_s);
1544 static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
1550 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
1551 for (i = 0; ie && i < ie[1]; i++) {
1552 if ((ie[i + 2] & 0x7f) > rate)
1553 rate = ie[i + 2] & 0x7f;
1556 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
1557 for (i = 0; ie && i < ie[1]; i++) {
1558 if ((ie[i + 2] & 0x7f) > rate)
1559 rate = ie[i + 2] & 0x7f;
1567 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1568 * @res: Scan result entry
1569 * @ie: Information element identitifier (WLAN_EID_*)
1570 * Returns: Pointer to the information element (id field) or %NULL if not found
1572 * This function returns the first matching information element in the scan
1575 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
1577 return get_ie((const u8 *) (res + 1), res->ie_len, ie);
1582 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1583 * @res: Scan result entry
1584 * @vendor_type: Vendor type (four octets starting the IE payload)
1585 * Returns: Pointer to the information element (id field) or %NULL if not found
1587 * This function returns the first matching information element in the scan
1590 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1593 const u8 *end, *pos;
1595 pos = (const u8 *) (res + 1);
1596 end = pos + res->ie_len;
1598 while (end - pos > 1) {
1599 if (2 + pos[1] > end - pos)
1601 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1602 vendor_type == WPA_GET_BE32(&pos[2]))
1612 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1613 * @res: Scan result entry
1614 * @vendor_type: Vendor type (four octets starting the IE payload)
1615 * Returns: Pointer to the information element (id field) or %NULL if not found
1617 * This function returns the first matching information element in the scan
1620 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1621 * from Beacon frames instead of either Beacon or Probe Response frames.
1623 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
1626 const u8 *end, *pos;
1628 if (res->beacon_ie_len == 0)
1631 pos = (const u8 *) (res + 1);
1633 end = pos + res->beacon_ie_len;
1635 while (end - pos > 1) {
1636 if (2 + pos[1] > end - pos)
1638 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1639 vendor_type == WPA_GET_BE32(&pos[2]))
1649 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1650 * @res: Scan result entry
1651 * @vendor_type: Vendor type (four octets starting the IE payload)
1652 * Returns: Pointer to the information element payload or %NULL if not found
1654 * This function returns concatenated payload of possibly fragmented vendor
1655 * specific information elements in the scan result. The caller is responsible
1656 * for freeing the returned buffer.
1658 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1662 const u8 *end, *pos;
1664 buf = wpabuf_alloc(res->ie_len);
1668 pos = (const u8 *) (res + 1);
1669 end = pos + res->ie_len;
1671 while (end - pos > 1) {
1672 if (2 + pos[1] > end - pos)
1674 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1675 vendor_type == WPA_GET_BE32(&pos[2]))
1676 wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4);
1680 if (wpabuf_len(buf) == 0) {
1690 * Channels with a great SNR can operate at full rate. What is a great SNR?
1691 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1692 * rule of thumb is that any SNR above 20 is good." This one
1693 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
1694 * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a
1695 * conservative value.
1697 #define GREAT_SNR 30
1699 #define IS_5GHZ(n) (n > 4000)
1701 /* Compare function for sorting scan results. Return >0 if @b is considered
1703 static int wpa_scan_result_compar(const void *a, const void *b)
1705 #define MIN(a,b) a < b ? a : b
1706 struct wpa_scan_res **_wa = (void *) a;
1707 struct wpa_scan_res **_wb = (void *) b;
1708 struct wpa_scan_res *wa = *_wa;
1709 struct wpa_scan_res *wb = *_wb;
1711 int snr_a, snr_b, snr_a_full, snr_b_full;
1713 /* WPA/WPA2 support preferred */
1714 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
1715 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
1716 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
1717 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
1719 if (wpa_b && !wpa_a)
1721 if (!wpa_b && wpa_a)
1724 /* privacy support preferred */
1725 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1726 (wb->caps & IEEE80211_CAP_PRIVACY))
1728 if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1729 (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1732 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
1733 snr_a_full = wa->snr;
1734 snr_a = MIN(wa->snr, GREAT_SNR);
1735 snr_b_full = wb->snr;
1736 snr_b = MIN(wb->snr, GREAT_SNR);
1738 /* Level is not in dBm, so we can't calculate
1739 * SNR. Just use raw level (units unknown). */
1740 snr_a = snr_a_full = wa->level;
1741 snr_b = snr_b_full = wb->level;
1744 /* if SNR is close, decide by max rate or frequency band */
1745 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
1746 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
1747 if (wa->est_throughput != wb->est_throughput)
1748 return wb->est_throughput - wa->est_throughput;
1749 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
1750 return IS_5GHZ(wa->freq) ? -1 : 1;
1753 /* all things being equal, use SNR; if SNRs are
1754 * identical, use quality values since some drivers may only report
1755 * that value and leave the signal level zero */
1756 if (snr_b_full == snr_a_full)
1757 return wb->qual - wa->qual;
1758 return snr_b_full - snr_a_full;
1764 /* Compare function for sorting scan results when searching a WPS AP for
1765 * provisioning. Return >0 if @b is considered better. */
1766 static int wpa_scan_result_wps_compar(const void *a, const void *b)
1768 struct wpa_scan_res **_wa = (void *) a;
1769 struct wpa_scan_res **_wb = (void *) b;
1770 struct wpa_scan_res *wa = *_wa;
1771 struct wpa_scan_res *wb = *_wb;
1772 int uses_wps_a, uses_wps_b;
1773 struct wpabuf *wps_a, *wps_b;
1776 /* Optimization - check WPS IE existence before allocated memory and
1777 * doing full reassembly. */
1778 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
1779 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
1780 if (uses_wps_a && !uses_wps_b)
1782 if (!uses_wps_a && uses_wps_b)
1785 if (uses_wps_a && uses_wps_b) {
1786 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
1787 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
1788 res = wps_ap_priority_compar(wps_a, wps_b);
1796 * Do not use current AP security policy as a sorting criteria during
1797 * WPS provisioning step since the AP may get reconfigured at the
1798 * completion of provisioning.
1801 /* all things being equal, use signal level; if signal levels are
1802 * identical, use quality values since some drivers may only report
1803 * that value and leave the signal level zero */
1804 if (wb->level == wa->level)
1805 return wb->qual - wa->qual;
1806 return wb->level - wa->level;
1808 #endif /* CONFIG_WPS */
1811 static void dump_scan_res(struct wpa_scan_results *scan_res)
1813 #ifndef CONFIG_NO_STDOUT_DEBUG
1816 if (scan_res->res == NULL || scan_res->num == 0)
1819 wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
1821 for (i = 0; i < scan_res->num; i++) {
1822 struct wpa_scan_res *r = scan_res->res[i];
1824 if (r->flags & WPA_SCAN_LEVEL_DBM) {
1825 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
1827 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
1828 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
1829 MAC2STR(r->bssid), r->freq, r->qual,
1830 r->noise, noise_valid ? "" : "~", r->level,
1831 r->snr, r->snr >= GREAT_SNR ? "*" : "",
1833 r->age, r->est_throughput);
1835 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
1836 "noise=%d level=%d flags=0x%x age=%u est=%u",
1837 MAC2STR(r->bssid), r->freq, r->qual,
1838 r->noise, r->level, r->flags, r->age,
1841 pos = (u8 *) (r + 1);
1843 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
1845 if (r->beacon_ie_len)
1846 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
1847 pos, r->beacon_ie_len);
1849 #endif /* CONFIG_NO_STDOUT_DEBUG */
1854 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
1855 * @wpa_s: Pointer to wpa_supplicant data
1856 * @bssid: BSSID to check
1857 * Returns: 0 if the BSSID is filtered or 1 if not
1859 * This function is used to filter out specific BSSIDs from scan reslts mainly
1860 * for testing purposes (SET bssid_filter ctrl_iface command).
1862 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
1867 if (wpa_s->bssid_filter == NULL)
1870 for (i = 0; i < wpa_s->bssid_filter_count; i++) {
1871 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
1880 void filter_scan_res(struct wpa_supplicant *wpa_s,
1881 struct wpa_scan_results *res)
1885 if (wpa_s->bssid_filter == NULL)
1888 for (i = 0, j = 0; i < res->num; i++) {
1889 if (wpa_supplicant_filter_bssid_match(wpa_s,
1890 res->res[i]->bssid)) {
1891 res->res[j++] = res->res[i];
1893 os_free(res->res[i]);
1898 if (res->num != j) {
1899 wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
1900 (int) (res->num - j));
1907 * Noise floor values to use when we have signal strength
1908 * measurements, but no noise floor measurements. These values were
1909 * measured in an office environment with many APs.
1911 #define DEFAULT_NOISE_FLOOR_2GHZ (-89)
1912 #define DEFAULT_NOISE_FLOOR_5GHZ (-92)
1914 void scan_snr(struct wpa_scan_res *res)
1916 if (res->flags & WPA_SCAN_NOISE_INVALID) {
1917 res->noise = IS_5GHZ(res->freq) ?
1918 DEFAULT_NOISE_FLOOR_5GHZ :
1919 DEFAULT_NOISE_FLOOR_2GHZ;
1922 if (res->flags & WPA_SCAN_LEVEL_DBM) {
1923 res->snr = res->level - res->noise;
1925 /* Level is not in dBm, so we can't calculate
1926 * SNR. Just use raw level (units unknown). */
1927 res->snr = res->level;
1932 static unsigned int max_ht20_rate(int snr)
1935 return 6500; /* HT20 MCS0 */
1937 return 13000; /* HT20 MCS1 */
1939 return 19500; /* HT20 MCS2 */
1941 return 26000; /* HT20 MCS3 */
1943 return 39000; /* HT20 MCS4 */
1945 return 52000; /* HT20 MCS5 */
1947 return 58500; /* HT20 MCS6 */
1948 return 65000; /* HT20 MCS7 */
1952 static unsigned int max_ht40_rate(int snr)
1955 return 13500; /* HT40 MCS0 */
1957 return 27000; /* HT40 MCS1 */
1959 return 40500; /* HT40 MCS2 */
1961 return 54000; /* HT40 MCS3 */
1963 return 81000; /* HT40 MCS4 */
1965 return 108000; /* HT40 MCS5 */
1967 return 121500; /* HT40 MCS6 */
1968 return 135000; /* HT40 MCS7 */
1972 static unsigned int max_vht80_rate(int snr)
1977 return 29300; /* VHT80 MCS0 */
1979 return 58500; /* VHT80 MCS1 */
1981 return 87800; /* VHT80 MCS2 */
1983 return 117000; /* VHT80 MCS3 */
1985 return 175500; /* VHT80 MCS4 */
1987 return 234000; /* VHT80 MCS5 */
1989 return 263300; /* VHT80 MCS6 */
1991 return 292500; /* VHT80 MCS7 */
1993 return 351000; /* VHT80 MCS8 */
1994 return 390000; /* VHT80 MCS9 */
1998 void scan_est_throughput(struct wpa_supplicant *wpa_s,
1999 struct wpa_scan_res *res)
2001 enum local_hw_capab capab = wpa_s->hw_capab;
2002 int rate; /* max legacy rate in 500 kb/s units */
2004 unsigned int est, tmp;
2007 if (res->est_throughput)
2010 /* Get maximum legacy rate */
2011 rate = wpa_scan_get_max_rate(res);
2013 /* Limit based on estimated SNR */
2014 if (rate > 1 * 2 && snr < 1)
2016 else if (rate > 2 * 2 && snr < 4)
2018 else if (rate > 6 * 2 && snr < 5)
2020 else if (rate > 9 * 2 && snr < 6)
2022 else if (rate > 12 * 2 && snr < 7)
2024 else if (rate > 18 * 2 && snr < 10)
2026 else if (rate > 24 * 2 && snr < 11)
2028 else if (rate > 36 * 2 && snr < 15)
2030 else if (rate > 48 * 2 && snr < 19)
2032 else if (rate > 54 * 2 && snr < 21)
2036 if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2037 ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP);
2039 tmp = max_ht20_rate(snr);
2045 if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2046 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2047 if (ie && ie[1] >= 2 &&
2048 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2049 tmp = max_ht40_rate(snr);
2055 if (capab == CAPAB_VHT) {
2056 /* Use +1 to assume VHT is always faster than HT */
2057 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP);
2059 tmp = max_ht20_rate(snr) + 1;
2063 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2064 if (ie && ie[1] >= 2 &&
2066 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2067 tmp = max_ht40_rate(snr) + 1;
2072 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION);
2073 if (ie && ie[1] >= 1 &&
2074 (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
2075 tmp = max_vht80_rate(snr) + 1;
2082 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
2084 res->est_throughput = est;
2089 * wpa_supplicant_get_scan_results - Get scan results
2090 * @wpa_s: Pointer to wpa_supplicant data
2091 * @info: Information about what was scanned or %NULL if not available
2092 * @new_scan: Whether a new scan was performed
2093 * Returns: Scan results, %NULL on failure
2095 * This function request the current scan results from the driver and updates
2096 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2097 * results with wpa_scan_results_free().
2099 struct wpa_scan_results *
2100 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
2101 struct scan_info *info, int new_scan)
2103 struct wpa_scan_results *scan_res;
2105 int (*compar)(const void *, const void *) = wpa_scan_result_compar;
2107 scan_res = wpa_drv_get_scan_results2(wpa_s);
2108 if (scan_res == NULL) {
2109 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
2112 if (scan_res->fetch_time.sec == 0) {
2114 * Make sure we have a valid timestamp if the driver wrapper
2115 * does not set this.
2117 os_get_reltime(&scan_res->fetch_time);
2119 filter_scan_res(wpa_s, scan_res);
2121 for (i = 0; i < scan_res->num; i++) {
2122 struct wpa_scan_res *scan_res_item = scan_res->res[i];
2124 scan_snr(scan_res_item);
2125 scan_est_throughput(wpa_s, scan_res_item);
2129 if (wpas_wps_searching(wpa_s)) {
2130 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
2131 "provisioning rules");
2132 compar = wpa_scan_result_wps_compar;
2134 #endif /* CONFIG_WPS */
2136 qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
2138 dump_scan_res(scan_res);
2140 wpa_bss_update_start(wpa_s);
2141 for (i = 0; i < scan_res->num; i++)
2142 wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
2143 &scan_res->fetch_time);
2144 wpa_bss_update_end(wpa_s, info, new_scan);
2151 * wpa_supplicant_update_scan_results - Update scan results from the driver
2152 * @wpa_s: Pointer to wpa_supplicant data
2153 * Returns: 0 on success, -1 on failure
2155 * This function updates the BSS table within wpa_supplicant based on the
2156 * currently available scan results from the driver without requesting a new
2157 * scan. This is used in cases where the driver indicates an association
2158 * (including roaming within ESS) and wpa_supplicant does not yet have the
2159 * needed information to complete the connection (e.g., to perform validation
2160 * steps in 4-way handshake).
2162 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
2164 struct wpa_scan_results *scan_res;
2165 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
2166 if (scan_res == NULL)
2168 wpa_scan_results_free(scan_res);
2175 * scan_only_handler - Reports scan results
2177 void scan_only_handler(struct wpa_supplicant *wpa_s,
2178 struct wpa_scan_results *scan_res)
2180 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
2181 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2182 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
2183 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
2184 wpa_s->manual_scan_id);
2185 wpa_s->manual_scan_use_id = 0;
2187 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
2189 wpas_notify_scan_results(wpa_s);
2190 wpas_notify_scan_done(wpa_s, 1);
2191 if (wpa_s->scan_work) {
2192 struct wpa_radio_work *work = wpa_s->scan_work;
2193 wpa_s->scan_work = NULL;
2194 radio_work_done(work);
2197 if (wpa_s->wpa_state == WPA_SCANNING)
2198 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
2202 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
2204 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
2208 struct wpa_driver_scan_params *
2209 wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
2211 struct wpa_driver_scan_params *params;
2215 params = os_zalloc(sizeof(*params));
2219 for (i = 0; i < src->num_ssids; i++) {
2220 if (src->ssids[i].ssid) {
2221 n = os_malloc(src->ssids[i].ssid_len);
2224 os_memcpy(n, src->ssids[i].ssid,
2225 src->ssids[i].ssid_len);
2226 params->ssids[i].ssid = n;
2227 params->ssids[i].ssid_len = src->ssids[i].ssid_len;
2230 params->num_ssids = src->num_ssids;
2232 if (src->extra_ies) {
2233 n = os_malloc(src->extra_ies_len);
2236 os_memcpy(n, src->extra_ies, src->extra_ies_len);
2237 params->extra_ies = n;
2238 params->extra_ies_len = src->extra_ies_len;
2242 int len = int_array_len(src->freqs);
2243 params->freqs = os_malloc((len + 1) * sizeof(int));
2244 if (params->freqs == NULL)
2246 os_memcpy(params->freqs, src->freqs, (len + 1) * sizeof(int));
2249 if (src->filter_ssids) {
2250 params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) *
2251 src->num_filter_ssids);
2252 if (params->filter_ssids == NULL)
2254 os_memcpy(params->filter_ssids, src->filter_ssids,
2255 sizeof(*params->filter_ssids) *
2256 src->num_filter_ssids);
2257 params->num_filter_ssids = src->num_filter_ssids;
2260 params->filter_rssi = src->filter_rssi;
2261 params->p2p_probe = src->p2p_probe;
2262 params->only_new_results = src->only_new_results;
2263 params->low_priority = src->low_priority;
2265 if (src->sched_scan_plans_num > 0) {
2266 params->sched_scan_plans =
2267 os_malloc(sizeof(*src->sched_scan_plans) *
2268 src->sched_scan_plans_num);
2269 if (!params->sched_scan_plans)
2272 os_memcpy(params->sched_scan_plans, src->sched_scan_plans,
2273 sizeof(*src->sched_scan_plans) *
2274 src->sched_scan_plans_num);
2275 params->sched_scan_plans_num = src->sched_scan_plans_num;
2278 if (src->mac_addr_rand) {
2279 params->mac_addr_rand = src->mac_addr_rand;
2281 if (src->mac_addr && src->mac_addr_mask) {
2284 mac_addr = os_malloc(2 * ETH_ALEN);
2288 os_memcpy(mac_addr, src->mac_addr, ETH_ALEN);
2289 os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask,
2291 params->mac_addr = mac_addr;
2292 params->mac_addr_mask = mac_addr + ETH_ALEN;
2299 bssid = os_malloc(ETH_ALEN);
2302 os_memcpy(bssid, src->bssid, ETH_ALEN);
2303 params->bssid = bssid;
2309 wpa_scan_free_params(params);
2314 void wpa_scan_free_params(struct wpa_driver_scan_params *params)
2321 for (i = 0; i < params->num_ssids; i++)
2322 os_free((u8 *) params->ssids[i].ssid);
2323 os_free((u8 *) params->extra_ies);
2324 os_free(params->freqs);
2325 os_free(params->filter_ssids);
2326 os_free(params->sched_scan_plans);
2329 * Note: params->mac_addr_mask points to same memory allocation and
2330 * must not be freed separately.
2332 os_free((u8 *) params->mac_addr);
2334 os_free((u8 *) params->bssid);
2340 int wpas_start_pno(struct wpa_supplicant *wpa_s)
2343 size_t i, num_ssid, num_match_ssid;
2344 struct wpa_ssid *ssid;
2345 struct wpa_driver_scan_params params;
2346 struct sched_scan_plan scan_plan;
2347 unsigned int max_sched_scan_ssids;
2349 if (!wpa_s->sched_scan_supported)
2352 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
2353 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
2355 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
2356 if (max_sched_scan_ssids < 1)
2359 if (wpa_s->pno || wpa_s->pno_sched_pending)
2362 if ((wpa_s->wpa_state > WPA_SCANNING) &&
2363 (wpa_s->wpa_state <= WPA_COMPLETED)) {
2364 wpa_printf(MSG_ERROR, "PNO: In assoc process");
2368 if (wpa_s->wpa_state == WPA_SCANNING) {
2369 wpa_supplicant_cancel_scan(wpa_s);
2370 if (wpa_s->sched_scanning) {
2371 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
2372 "ongoing sched scan");
2373 wpa_supplicant_cancel_sched_scan(wpa_s);
2374 wpa_s->pno_sched_pending = 1;
2379 os_memset(¶ms, 0, sizeof(params));
2381 num_ssid = num_match_ssid = 0;
2382 ssid = wpa_s->conf->ssid;
2384 if (!wpas_network_disabled(wpa_s, ssid)) {
2386 if (ssid->scan_ssid)
2392 if (num_match_ssid == 0) {
2393 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
2397 if (num_match_ssid > num_ssid) {
2398 params.num_ssids++; /* wildcard */
2402 if (num_ssid > max_sched_scan_ssids) {
2403 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
2404 "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
2405 num_ssid = max_sched_scan_ssids;
2408 if (num_match_ssid > wpa_s->max_match_sets) {
2409 num_match_ssid = wpa_s->max_match_sets;
2410 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
2412 params.filter_ssids = os_calloc(num_match_ssid,
2413 sizeof(struct wpa_driver_scan_filter));
2414 if (params.filter_ssids == NULL)
2419 ssid = wpa_s->conf->pssid[prio];
2421 if (!wpas_network_disabled(wpa_s, ssid)) {
2422 if (ssid->scan_ssid && params.num_ssids < num_ssid) {
2423 params.ssids[params.num_ssids].ssid =
2425 params.ssids[params.num_ssids].ssid_len =
2429 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
2431 params.filter_ssids[i].ssid_len = ssid->ssid_len;
2432 params.num_filter_ssids++;
2434 if (i == num_match_ssid)
2439 else if (prio + 1 == wpa_s->conf->num_prio)
2442 ssid = wpa_s->conf->pssid[++prio];
2445 if (wpa_s->conf->filter_rssi)
2446 params.filter_rssi = wpa_s->conf->filter_rssi;
2448 if (wpa_s->sched_scan_plans_num) {
2449 params.sched_scan_plans = wpa_s->sched_scan_plans;
2450 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
2452 /* Set one scan plan that will run infinitely */
2453 if (wpa_s->conf->sched_scan_interval)
2454 scan_plan.interval = wpa_s->conf->sched_scan_interval;
2456 scan_plan.interval = 10;
2458 scan_plan.iterations = 0;
2459 params.sched_scan_plans = &scan_plan;
2460 params.sched_scan_plans_num = 1;
2463 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
2464 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
2465 params.freqs = wpa_s->manual_sched_scan_freqs;
2468 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) {
2469 params.mac_addr_rand = 1;
2470 if (wpa_s->mac_addr_pno) {
2471 params.mac_addr = wpa_s->mac_addr_pno;
2472 params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN;
2476 ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms);
2477 os_free(params.filter_ssids);
2481 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
2486 int wpas_stop_pno(struct wpa_supplicant *wpa_s)
2493 ret = wpa_supplicant_stop_sched_scan(wpa_s);
2496 wpa_s->pno_sched_pending = 0;
2498 if (wpa_s->wpa_state == WPA_SCANNING)
2499 wpa_supplicant_req_scan(wpa_s, 0, 0);
2505 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
2508 type &= MAC_ADDR_RAND_ALL;
2509 wpa_s->mac_addr_rand_enable &= ~type;
2511 if (type & MAC_ADDR_RAND_SCAN) {
2512 os_free(wpa_s->mac_addr_scan);
2513 wpa_s->mac_addr_scan = NULL;
2516 if (type & MAC_ADDR_RAND_SCHED_SCAN) {
2517 os_free(wpa_s->mac_addr_sched_scan);
2518 wpa_s->mac_addr_sched_scan = NULL;
2521 if (type & MAC_ADDR_RAND_PNO) {
2522 os_free(wpa_s->mac_addr_pno);
2523 wpa_s->mac_addr_pno = NULL;
2528 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
2529 unsigned int type, const u8 *addr,
2534 wpas_mac_addr_rand_scan_clear(wpa_s, type);
2537 tmp = os_malloc(2 * ETH_ALEN);
2540 os_memcpy(tmp, addr, ETH_ALEN);
2541 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
2544 if (type == MAC_ADDR_RAND_SCAN) {
2545 wpa_s->mac_addr_scan = tmp;
2546 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
2547 wpa_s->mac_addr_sched_scan = tmp;
2548 } else if (type == MAC_ADDR_RAND_PNO) {
2549 wpa_s->mac_addr_pno = tmp;
2551 wpa_printf(MSG_INFO,
2552 "scan: Invalid MAC randomization type=0x%x",
2558 wpa_s->mac_addr_rand_enable |= type;
2563 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
2565 int scan_work = !!wpa_s->scan_work;
2568 scan_work |= !!wpa_s->p2p_scan_work;
2569 #endif /* CONFIG_P2P */
2571 if (scan_work && wpa_s->own_scan_running) {
2572 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
2573 return wpa_drv_abort_scan(wpa_s);
2580 int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
2582 struct sched_scan_plan *scan_plans = NULL;
2583 const char *token, *context = NULL;
2584 unsigned int num = 0;
2590 wpa_printf(MSG_DEBUG, "Clear sched scan plans");
2591 os_free(wpa_s->sched_scan_plans);
2592 wpa_s->sched_scan_plans = NULL;
2593 wpa_s->sched_scan_plans_num = 0;
2597 while ((token = cstr_token(cmd, " ", &context))) {
2599 struct sched_scan_plan *scan_plan, *n;
2601 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
2606 scan_plan = &scan_plans[num];
2609 ret = sscanf(token, "%u:%u", &scan_plan->interval,
2610 &scan_plan->iterations);
2611 if (ret <= 0 || ret > 2 || !scan_plan->interval) {
2612 wpa_printf(MSG_ERROR,
2613 "Invalid sched scan plan input: %s", token);
2617 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
2618 wpa_printf(MSG_WARNING,
2619 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
2620 num, scan_plan->interval,
2621 wpa_s->max_sched_scan_plan_interval);
2622 scan_plan->interval =
2623 wpa_s->max_sched_scan_plan_interval;
2627 scan_plan->iterations = 0;
2631 if (!scan_plan->iterations) {
2632 wpa_printf(MSG_ERROR,
2633 "scan plan %u: Number of iterations cannot be zero",
2638 if (scan_plan->iterations >
2639 wpa_s->max_sched_scan_plan_iterations) {
2640 wpa_printf(MSG_WARNING,
2641 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
2642 num, scan_plan->iterations,
2643 wpa_s->max_sched_scan_plan_iterations);
2644 scan_plan->iterations =
2645 wpa_s->max_sched_scan_plan_iterations;
2648 wpa_printf(MSG_DEBUG,
2649 "scan plan %u: interval=%u iterations=%u",
2650 num, scan_plan->interval, scan_plan->iterations);
2654 wpa_printf(MSG_ERROR, "Invalid scan plans entry");
2658 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
2659 wpa_printf(MSG_ERROR,
2660 "All scan plans but the last must specify a number of iterations");
2664 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
2665 num, scan_plans[num - 1].interval);
2667 if (num > wpa_s->max_sched_scan_plans) {
2668 wpa_printf(MSG_WARNING,
2669 "Too many scheduled scan plans (only %u supported)",
2670 wpa_s->max_sched_scan_plans);
2671 wpa_printf(MSG_WARNING,
2672 "Use only the first %u scan plans, and the last one (in infinite loop)",
2673 wpa_s->max_sched_scan_plans - 1);
2674 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
2675 &scan_plans[num - 1], sizeof(*scan_plans));
2676 num = wpa_s->max_sched_scan_plans;
2679 os_free(wpa_s->sched_scan_plans);
2680 wpa_s->sched_scan_plans = scan_plans;
2681 wpa_s->sched_scan_plans_num = num;
2686 os_free(scan_plans);
2687 wpa_printf(MSG_ERROR, "invalid scan plans list");