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 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s)
431 struct wpabuf *default_ies = NULL;
434 enum wpa_driver_if_type type = WPA_IF_STATION;
437 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
438 type = WPA_IF_P2P_CLIENT;
439 #endif /* CONFIG_P2P */
441 wpa_drv_get_ext_capa(wpa_s, type);
443 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
445 if (ext_capab_len > 0 &&
446 wpabuf_resize(&default_ies, ext_capab_len) == 0)
447 wpabuf_put_data(default_ies, ext_capab, ext_capab_len);
450 /* Send cellular capabilities for potential MBO STAs */
451 if (wpabuf_resize(&default_ies, 9) == 0)
452 wpas_mbo_scan_ie(wpa_s, default_ies);
453 #endif /* CONFIG_MBO */
456 wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies),
457 wpabuf_len(default_ies));
458 wpabuf_free(default_ies);
462 static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
464 struct wpabuf *extra_ie = NULL;
469 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
470 #endif /* CONFIG_WPS */
473 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
474 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
476 #endif /* CONFIG_P2P */
477 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
479 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
481 if (ext_capab_len > 0 &&
482 wpabuf_resize(&extra_ie, ext_capab_len) == 0)
483 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
485 #ifdef CONFIG_INTERWORKING
486 if (wpa_s->conf->interworking &&
487 wpabuf_resize(&extra_ie, 100) == 0)
488 wpas_add_interworking_elements(wpa_s, extra_ie);
489 #endif /* CONFIG_INTERWORKING */
492 wps = wpas_wps_in_use(wpa_s, &req_type);
495 struct wpabuf *wps_ie;
496 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
499 wpa_s->wps->uuid, req_type,
502 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
503 wpabuf_put_buf(extra_ie, wps_ie);
510 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
511 if (wpabuf_resize(&extra_ie, ielen) == 0)
512 wpas_p2p_scan_ie(wpa_s, extra_ie);
514 #endif /* CONFIG_P2P */
516 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
518 #endif /* CONFIG_WPS */
521 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
522 wpas_hs20_add_indication(extra_ie, -1);
523 #endif /* CONFIG_HS20 */
526 if (wpa_s->fst_ies &&
527 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
528 wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
529 #endif /* CONFIG_FST */
532 /* Send cellular capabilities for potential MBO STAs */
533 if (wpabuf_resize(&extra_ie, 9) == 0)
534 wpas_mbo_scan_ie(wpa_s, extra_ie);
535 #endif /* CONFIG_MBO */
537 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
538 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
540 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
541 wpabuf_put_buf(extra_ie, buf);
551 * Check whether there are any enabled networks or credentials that could be
552 * used for a non-P2P connection.
554 static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
556 struct wpa_ssid *ssid;
558 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
559 if (wpas_network_disabled(wpa_s, ssid))
561 if (!ssid->p2p_group)
565 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
566 wpa_s->conf->auto_interworking)
572 #endif /* CONFIG_P2P */
575 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
576 enum hostapd_hw_mode band,
577 struct wpa_driver_scan_params *params)
579 /* Include only supported channels for the specified band */
580 struct hostapd_hw_modes *mode;
583 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
585 /* No channels supported in this band - use empty list */
586 params->freqs = os_zalloc(sizeof(int));
590 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
591 if (params->freqs == NULL)
593 for (count = 0, i = 0; i < mode->num_channels; i++) {
594 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
596 params->freqs[count++] = mode->channels[i].freq;
601 static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
602 struct wpa_driver_scan_params *params)
604 if (wpa_s->hw.modes == NULL)
605 return; /* unknown what channels the driver supports */
607 return; /* already using a limited channel set */
608 if (wpa_s->setband == WPA_SETBAND_5G)
609 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A,
611 else if (wpa_s->setband == WPA_SETBAND_2G)
612 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G,
617 static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
618 struct wpa_driver_scan_params *params,
622 struct wpa_ssid *ssid;
625 * For devices with max_ssids greater than 1, leave the last slot empty
626 * for adding the wildcard scan entry.
628 max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids;
630 for (i = 0; i < wpa_s->scan_id_count; i++) {
633 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
634 if (!ssid || !ssid->scan_ssid)
637 for (j = 0; j < params->num_ssids; j++) {
638 if (params->ssids[j].ssid_len == ssid->ssid_len &&
639 params->ssids[j].ssid &&
640 os_memcmp(params->ssids[j].ssid, ssid->ssid,
641 ssid->ssid_len) == 0)
644 if (j < params->num_ssids)
645 continue; /* already in the list */
647 if (params->num_ssids + 1 > max_ssids) {
648 wpa_printf(MSG_DEBUG,
649 "Over max scan SSIDs for manual request");
653 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
654 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
655 params->ssids[params->num_ssids].ssid = ssid->ssid;
656 params->ssids[params->num_ssids].ssid_len = ssid->ssid_len;
660 wpa_s->scan_id_count = 0;
664 static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
665 struct wpa_driver_scan_params *params,
670 if (wpa_s->ssids_from_scan_req == NULL ||
671 wpa_s->num_ssids_from_scan_req == 0)
674 if (wpa_s->num_ssids_from_scan_req > max_ssids) {
675 wpa_s->num_ssids_from_scan_req = max_ssids;
676 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
677 (unsigned int) max_ssids);
680 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
681 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
682 params->ssids[i].ssid_len =
683 wpa_s->ssids_from_scan_req[i].ssid_len;
684 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
685 params->ssids[i].ssid,
686 params->ssids[i].ssid_len);
689 params->num_ssids = wpa_s->num_ssids_from_scan_req;
690 wpa_s->num_ssids_from_scan_req = 0;
695 static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
697 struct wpa_supplicant *wpa_s = eloop_ctx;
698 struct wpa_ssid *ssid;
699 int ret, p2p_in_prog;
700 struct wpabuf *extra_ie = NULL;
701 struct wpa_driver_scan_params params;
702 struct wpa_driver_scan_params *scan_params;
704 int connect_without_scan = 0;
706 if (wpa_s->pno || wpa_s->pno_sched_pending) {
707 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress");
711 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
712 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
716 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
717 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
718 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
722 if (wpa_s->scanning) {
724 * If we are already in scanning state, we shall reschedule the
725 * the incoming scan request.
727 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
728 wpa_supplicant_req_scan(wpa_s, 1, 0);
732 if (!wpa_supplicant_enabled_networks(wpa_s) &&
733 wpa_s->scan_req == NORMAL_SCAN_REQ) {
734 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
735 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
739 if (wpa_s->conf->ap_scan != 0 &&
740 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
741 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
742 "overriding ap_scan configuration");
743 wpa_s->conf->ap_scan = 0;
744 wpas_notify_ap_scan_changed(wpa_s);
747 if (wpa_s->conf->ap_scan == 0) {
748 wpa_supplicant_gen_assoc_event(wpa_s);
753 if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
754 wpa_s->connect_without_scan) {
755 connect_without_scan = 1;
756 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
757 if (ssid == wpa_s->connect_without_scan)
762 p2p_in_prog = wpas_p2p_in_progress(wpa_s);
763 if (p2p_in_prog && p2p_in_prog != 2 &&
765 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
766 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
767 wpa_supplicant_req_scan(wpa_s, 5, 0);
771 if (wpa_s->conf->ap_scan == 2)
774 max_ssids = wpa_s->max_scan_ssids;
775 if (max_ssids > WPAS_MAX_SCAN_SSIDS)
776 max_ssids = WPAS_MAX_SCAN_SSIDS;
779 wpa_s->last_scan_req = wpa_s->scan_req;
780 wpa_s->scan_req = NORMAL_SCAN_REQ;
782 if (connect_without_scan) {
783 wpa_s->connect_without_scan = NULL;
785 wpa_printf(MSG_DEBUG, "Start a pre-selected network "
786 "without scan step");
787 wpa_supplicant_associate(wpa_s, NULL, ssid);
792 os_memset(¶ms, 0, sizeof(params));
794 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
795 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
796 wpa_s->wpa_state == WPA_INACTIVE)
797 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
800 * If autoscan has set its own scanning parameters
802 if (wpa_s->autoscan_params != NULL) {
803 scan_params = wpa_s->autoscan_params;
807 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
808 wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) {
809 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
814 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
815 wpa_s->go_params && !wpa_s->conf->passive_scan) {
816 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
817 wpa_s->p2p_in_provisioning,
818 wpa_s->show_group_started);
819 params.ssids[0].ssid = wpa_s->go_params->ssid;
820 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
821 params.num_ssids = 1;
825 if (wpa_s->p2p_in_invitation) {
826 if (wpa_s->current_ssid) {
827 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
828 params.ssids[0].ssid = wpa_s->current_ssid->ssid;
829 params.ssids[0].ssid_len =
830 wpa_s->current_ssid->ssid_len;
831 params.num_ssids = 1;
833 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
837 #endif /* CONFIG_P2P */
839 /* Find the starting point from which to continue scanning */
840 ssid = wpa_s->conf->ssid;
841 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
843 if (ssid == wpa_s->prev_scan_ssid) {
851 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
854 #endif /* CONFIG_AP */
855 wpa_s->conf->ap_scan == 2) {
856 wpa_s->connect_without_scan = NULL;
857 wpa_s->prev_scan_wildcard = 0;
858 wpa_supplicant_assoc_try(wpa_s, ssid);
860 } else if (wpa_s->conf->ap_scan == 2) {
862 * User-initiated scan request in ap_scan == 2; scan with
866 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
868 * Perform single-channel single-SSID scan for
869 * reassociate-to-same-BSS operation.
872 ssid = wpa_s->current_ssid;
873 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
874 ssid->ssid, ssid->ssid_len);
875 params.ssids[0].ssid = ssid->ssid;
876 params.ssids[0].ssid_len = ssid->ssid_len;
877 params.num_ssids = 1;
880 * Allocate memory for frequency array, allocate one extra
881 * slot for the zero-terminator.
883 params.freqs = os_malloc(sizeof(int) * 2);
885 params.freqs[0] = wpa_s->assoc_freq;
890 * Reset the reattach flag so that we fall back to full scan if
895 struct wpa_ssid *start = ssid, *tssid;
897 if (ssid == NULL && max_ssids > 1)
898 ssid = wpa_s->conf->ssid;
900 if (!wpas_network_disabled(wpa_s, ssid) &&
902 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
903 ssid->ssid, ssid->ssid_len);
904 params.ssids[params.num_ssids].ssid =
906 params.ssids[params.num_ssids].ssid_len =
909 if (params.num_ssids + 1 >= max_ssids)
915 if (ssid == NULL && max_ssids > 1 &&
916 start != wpa_s->conf->ssid)
917 ssid = wpa_s->conf->ssid;
920 if (wpa_s->scan_id_count &&
921 wpa_s->last_scan_req == MANUAL_SCAN_REQ)
922 wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids);
924 for (tssid = wpa_s->conf->ssid;
925 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
926 tssid = tssid->next) {
927 if (wpas_network_disabled(wpa_s, tssid))
929 if ((params.freqs || !freqs_set) && tssid->scan_freq) {
930 int_array_concat(¶ms.freqs,
933 os_free(params.freqs);
938 int_array_sort_unique(params.freqs);
941 if (ssid && max_ssids == 1) {
943 * If the driver is limited to 1 SSID at a time interleave
944 * wildcard SSID scans with specific SSID scans to avoid
945 * waiting a long time for a wildcard scan.
947 if (!wpa_s->prev_scan_wildcard) {
948 params.ssids[0].ssid = NULL;
949 params.ssids[0].ssid_len = 0;
950 wpa_s->prev_scan_wildcard = 1;
951 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
952 "wildcard SSID (Interleave with specific)");
954 wpa_s->prev_scan_ssid = ssid;
955 wpa_s->prev_scan_wildcard = 0;
956 wpa_dbg(wpa_s, MSG_DEBUG,
957 "Starting AP scan for specific SSID: %s",
958 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
963 wpa_s->prev_scan_ssid = ssid;
964 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
967 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
968 wpa_s->manual_scan_passive && params.num_ssids == 0) {
969 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
970 } else if (wpa_s->conf->passive_scan) {
971 wpa_dbg(wpa_s, MSG_DEBUG,
972 "Use passive scan based on configuration");
974 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
976 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
981 wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
982 extra_ie = wpa_supplicant_extra_ies(wpa_s);
984 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
985 wpa_s->manual_scan_only_new) {
986 wpa_printf(MSG_DEBUG,
987 "Request driver to clear scan cache due to manual only_new=1 scan");
988 params.only_new_results = 1;
991 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
992 wpa_s->manual_scan_freqs) {
993 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
994 params.freqs = wpa_s->manual_scan_freqs;
995 wpa_s->manual_scan_freqs = NULL;
998 if (params.freqs == NULL && wpa_s->next_scan_freqs) {
999 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
1000 "generated frequency list");
1001 params.freqs = wpa_s->next_scan_freqs;
1003 os_free(wpa_s->next_scan_freqs);
1004 wpa_s->next_scan_freqs = NULL;
1005 wpa_setband_scan_freqs(wpa_s, ¶ms);
1007 /* See if user specified frequencies. If so, scan only those. */
1008 if (wpa_s->conf->freq_list && !params.freqs) {
1009 wpa_dbg(wpa_s, MSG_DEBUG,
1010 "Optimize scan based on conf->freq_list");
1011 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
1014 /* Use current associated channel? */
1015 if (wpa_s->conf->scan_cur_freq && !params.freqs) {
1016 unsigned int num = wpa_s->num_multichan_concurrent;
1018 params.freqs = os_calloc(num + 1, sizeof(int));
1020 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1022 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
1023 "current operating channels since "
1024 "scan_cur_freq is enabled");
1026 os_free(params.freqs);
1027 params.freqs = NULL;
1032 params.filter_ssids = wpa_supplicant_build_filter_ssids(
1033 wpa_s->conf, ¶ms.num_filter_ssids);
1035 params.extra_ies = wpabuf_head(extra_ie);
1036 params.extra_ies_len = wpabuf_len(extra_ie);
1040 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
1041 (wpa_s->show_group_started && wpa_s->go_params)) {
1043 * The interface may not yet be in P2P mode, so we have to
1044 * explicitly request P2P probe to disable CCK rates.
1046 params.p2p_probe = 1;
1048 #endif /* CONFIG_P2P */
1050 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) {
1051 params.mac_addr_rand = 1;
1052 if (wpa_s->mac_addr_scan) {
1053 params.mac_addr = wpa_s->mac_addr_scan;
1054 params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN;
1058 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
1059 struct wpa_bss *bss;
1061 params.bssid = wpa_s->next_scan_bssid;
1062 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
1063 if (bss && bss->ssid_len && params.num_ssids == 1 &&
1064 params.ssids[0].ssid_len == 0) {
1065 params.ssids[0].ssid = bss->ssid;
1066 params.ssids[0].ssid_len = bss->ssid_len;
1067 wpa_dbg(wpa_s, MSG_DEBUG,
1068 "Scan a previously specified BSSID " MACSTR
1070 MAC2STR(params.bssid),
1071 wpa_ssid_txt(bss->ssid, bss->ssid_len));
1073 wpa_dbg(wpa_s, MSG_DEBUG,
1074 "Scan a previously specified BSSID " MACSTR,
1075 MAC2STR(params.bssid));
1079 scan_params = ¶ms;
1084 * If the driver does not support multi-channel concurrency and a
1085 * virtual interface that shares the same radio with the wpa_s interface
1086 * is operating there may not be need to scan other channels apart from
1087 * the current operating channel on the other virtual interface. Filter
1088 * out other channels in case we are trying to find a connection for a
1089 * station interface when we are not configured to prefer station
1090 * connection and a concurrent operation is already in process.
1092 if (wpa_s->scan_for_connection &&
1093 wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
1094 !scan_params->freqs && !params.freqs &&
1095 wpas_is_p2p_prioritized(wpa_s) &&
1096 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
1097 non_p2p_network_enabled(wpa_s)) {
1098 unsigned int num = wpa_s->num_multichan_concurrent;
1100 params.freqs = os_calloc(num + 1, sizeof(int));
1102 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1103 if (num > 0 && num == wpa_s->num_multichan_concurrent) {
1104 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
1106 os_free(params.freqs);
1107 params.freqs = NULL;
1111 #endif /* CONFIG_P2P */
1113 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
1115 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
1116 !wpa_s->manual_scan_freqs) {
1117 /* Restore manual_scan_freqs for the next attempt */
1118 wpa_s->manual_scan_freqs = params.freqs;
1119 params.freqs = NULL;
1122 wpabuf_free(extra_ie);
1123 os_free(params.freqs);
1124 os_free(params.filter_ssids);
1127 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
1128 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
1129 wpa_supplicant_set_state(wpa_s,
1130 wpa_s->scan_prev_wpa_state);
1131 /* Restore scan_req since we will try to scan again */
1132 wpa_s->scan_req = wpa_s->last_scan_req;
1133 wpa_supplicant_req_scan(wpa_s, 1, 0);
1135 wpa_s->scan_for_connection = 0;
1136 #ifdef CONFIG_INTERWORKING
1137 wpa_s->interworking_fast_assoc_tried = 0;
1138 #endif /* CONFIG_INTERWORKING */
1140 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
1145 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
1147 struct os_reltime remaining, new_int;
1150 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
1155 if (cancelled && os_reltime_before(&remaining, &new_int)) {
1156 new_int.sec = remaining.sec;
1157 new_int.usec = remaining.usec;
1161 eloop_register_timeout(new_int.sec, new_int.usec,
1162 wpa_supplicant_scan, wpa_s, NULL);
1164 wpa_s->scan_interval = sec;
1169 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1170 * @wpa_s: Pointer to wpa_supplicant data
1171 * @sec: Number of seconds after which to scan
1172 * @usec: Number of microseconds after which to scan
1174 * This function is used to schedule a scan for neighboring access points after
1175 * the specified time.
1177 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
1181 if (wpa_s->p2p_mgmt) {
1182 wpa_dbg(wpa_s, MSG_DEBUG,
1183 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1188 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
1191 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
1193 } else if (res == 0) {
1194 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1197 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
1199 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
1205 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1206 * @wpa_s: Pointer to wpa_supplicant data
1207 * @sec: Number of seconds after which to scan
1208 * @usec: Number of microseconds after which to scan
1209 * Returns: 0 on success or -1 otherwise
1211 * This function is used to schedule periodic scans for neighboring
1212 * access points after the specified time.
1214 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
1217 if (!wpa_s->sched_scan_supported)
1220 eloop_register_timeout(sec, usec,
1221 wpa_supplicant_delayed_sched_scan_timeout,
1229 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1230 * @wpa_s: Pointer to wpa_supplicant data
1231 * Returns: 0 is sched_scan was started or -1 otherwise
1233 * This function is used to schedule periodic scans for neighboring
1234 * access points repeating the scan continuously.
1236 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
1238 struct wpa_driver_scan_params params;
1239 struct wpa_driver_scan_params *scan_params;
1240 enum wpa_states prev_state;
1241 struct wpa_ssid *ssid = NULL;
1242 struct wpabuf *extra_ie = NULL;
1244 unsigned int max_sched_scan_ssids;
1247 struct sched_scan_plan scan_plan;
1249 if (!wpa_s->sched_scan_supported)
1252 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
1253 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
1255 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
1256 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
1259 if (wpa_s->sched_scanning) {
1260 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
1265 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1266 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
1267 /* Use wildcard SSID to find this network */
1269 } else if (!wpas_network_disabled(wpa_s, ssid) &&
1274 if (!wpas_network_disabled(wpa_s, ssid) &&
1275 ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1277 * Normal scan is more reliable and faster for WPS
1278 * operations and since these are for short periods of
1279 * time, the benefit of trying to use sched_scan would
1282 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1283 "sched_scan for WPS");
1286 #endif /* CONFIG_WPS */
1291 if (wpa_s->normal_scans < 3 &&
1292 (need_ssids <= wpa_s->max_scan_ssids ||
1293 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
1295 * When normal scan can speed up operations, use that for the
1296 * first operations before starting the sched_scan to allow
1297 * user space sleep more. We do this only if the normal scan
1298 * has functionality that is suitable for this or if the
1299 * sched_scan does not have better support for multiple SSIDs.
1301 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1302 "sched_scan for initial scans (normal_scans=%d)",
1303 wpa_s->normal_scans);
1307 os_memset(¶ms, 0, sizeof(params));
1309 /* If we can't allocate space for the filters, we just don't filter */
1310 params.filter_ssids = os_calloc(wpa_s->max_match_sets,
1311 sizeof(struct wpa_driver_scan_filter));
1313 prev_state = wpa_s->wpa_state;
1314 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1315 wpa_s->wpa_state == WPA_INACTIVE)
1316 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1318 if (wpa_s->autoscan_params != NULL) {
1319 scan_params = wpa_s->autoscan_params;
1323 /* Find the starting point from which to continue scanning */
1324 ssid = wpa_s->conf->ssid;
1325 if (wpa_s->prev_sched_ssid) {
1327 if (ssid == wpa_s->prev_sched_ssid) {
1335 if (!ssid || !wpa_s->prev_sched_ssid) {
1336 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
1337 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1338 wpa_s->first_sched_scan = 1;
1339 ssid = wpa_s->conf->ssid;
1340 wpa_s->prev_sched_ssid = ssid;
1344 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
1349 if (wpas_network_disabled(wpa_s, ssid))
1352 if (params.num_filter_ssids < wpa_s->max_match_sets &&
1353 params.filter_ssids && ssid->ssid && ssid->ssid_len) {
1354 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
1355 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1356 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
1357 ssid->ssid, ssid->ssid_len);
1358 params.filter_ssids[params.num_filter_ssids].ssid_len =
1360 params.num_filter_ssids++;
1361 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
1363 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
1364 "filter for sched_scan - drop filter");
1365 os_free(params.filter_ssids);
1366 params.filter_ssids = NULL;
1367 params.num_filter_ssids = 0;
1370 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
1371 if (params.num_ssids == max_sched_scan_ssids)
1372 break; /* only room for broadcast SSID */
1373 wpa_dbg(wpa_s, MSG_DEBUG,
1374 "add to active scan ssid: %s",
1375 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1376 params.ssids[params.num_ssids].ssid =
1378 params.ssids[params.num_ssids].ssid_len =
1381 if (params.num_ssids >= max_sched_scan_ssids) {
1382 wpa_s->prev_sched_ssid = ssid;
1386 (wpas_network_disabled(wpa_s, ssid) ||
1393 wpa_s->prev_sched_ssid = ssid;
1397 if (params.num_filter_ssids == 0) {
1398 os_free(params.filter_ssids);
1399 params.filter_ssids = NULL;
1402 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1404 params.extra_ies = wpabuf_head(extra_ie);
1405 params.extra_ies_len = wpabuf_len(extra_ie);
1408 if (wpa_s->conf->filter_rssi)
1409 params.filter_rssi = wpa_s->conf->filter_rssi;
1411 /* See if user specified frequencies. If so, scan only those. */
1412 if (wpa_s->conf->freq_list && !params.freqs) {
1413 wpa_dbg(wpa_s, MSG_DEBUG,
1414 "Optimize scan based on conf->freq_list");
1415 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
1418 scan_params = ¶ms;
1421 wpa_s->sched_scan_timed_out = 0;
1424 * We cannot support multiple scan plans if the scan request includes
1425 * too many SSID's, so in this case use only the last scan plan and make
1426 * it run infinitely. It will be stopped by the timeout.
1428 if (wpa_s->sched_scan_plans_num == 1 ||
1429 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
1430 params.sched_scan_plans = wpa_s->sched_scan_plans;
1431 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
1432 } else if (wpa_s->sched_scan_plans_num > 1) {
1433 wpa_dbg(wpa_s, MSG_DEBUG,
1434 "Too many SSIDs. Default to using single scheduled_scan plan");
1435 params.sched_scan_plans =
1436 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
1438 params.sched_scan_plans_num = 1;
1440 if (wpa_s->conf->sched_scan_interval)
1441 scan_plan.interval = wpa_s->conf->sched_scan_interval;
1443 scan_plan.interval = 10;
1445 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
1446 wpa_printf(MSG_WARNING,
1447 "Scan interval too long(%u), use the maximum allowed(%u)",
1449 wpa_s->max_sched_scan_plan_interval);
1450 scan_plan.interval =
1451 wpa_s->max_sched_scan_plan_interval;
1454 scan_plan.iterations = 0;
1455 params.sched_scan_plans = &scan_plan;
1456 params.sched_scan_plans_num = 1;
1459 if (ssid || !wpa_s->first_sched_scan) {
1460 wpa_dbg(wpa_s, MSG_DEBUG,
1461 "Starting sched scan: interval %u timeout %d",
1462 params.sched_scan_plans[0].interval,
1463 wpa_s->sched_scan_timeout);
1465 wpa_dbg(wpa_s, MSG_DEBUG, "Starting sched scan (no timeout)");
1468 wpa_setband_scan_freqs(wpa_s, scan_params);
1470 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) {
1471 params.mac_addr_rand = 1;
1472 if (wpa_s->mac_addr_sched_scan) {
1473 params.mac_addr = wpa_s->mac_addr_sched_scan;
1474 params.mac_addr_mask = wpa_s->mac_addr_sched_scan +
1479 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
1480 wpabuf_free(extra_ie);
1481 os_free(params.filter_ssids);
1483 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
1484 if (prev_state != wpa_s->wpa_state)
1485 wpa_supplicant_set_state(wpa_s, prev_state);
1489 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1490 if (ssid || !wpa_s->first_sched_scan) {
1491 wpa_s->sched_scan_timed_out = 0;
1492 eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
1493 wpa_supplicant_sched_scan_timeout,
1495 wpa_s->first_sched_scan = 0;
1496 wpa_s->sched_scan_timeout /= 2;
1497 params.sched_scan_plans[0].interval *= 2;
1498 if ((unsigned int) wpa_s->sched_scan_timeout <
1499 params.sched_scan_plans[0].interval ||
1500 params.sched_scan_plans[0].interval >
1501 wpa_s->max_sched_scan_plan_interval) {
1502 params.sched_scan_plans[0].interval = 10;
1503 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1507 /* If there is no more ssids, start next time from the beginning */
1509 wpa_s->prev_sched_ssid = NULL;
1516 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1517 * @wpa_s: Pointer to wpa_supplicant data
1519 * This function is used to cancel a scan request scheduled with
1520 * wpa_supplicant_req_scan().
1522 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
1524 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
1525 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
1530 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1531 * @wpa_s: Pointer to wpa_supplicant data
1533 * This function is used to stop a delayed scheduled scan.
1535 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
1537 if (!wpa_s->sched_scan_supported)
1540 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
1541 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
1547 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1548 * @wpa_s: Pointer to wpa_supplicant data
1550 * This function is used to stop a periodic scheduled scan.
1552 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
1554 if (!wpa_s->sched_scanning)
1557 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
1558 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
1559 wpa_supplicant_stop_sched_scan(wpa_s);
1564 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1565 * @wpa_s: Pointer to wpa_supplicant data
1566 * @scanning: Whether scanning is currently in progress
1568 * This function is to generate scanning notifycations. It is called whenever
1569 * there may have been a change in scanning (scan started, completed, stopped).
1570 * wpas_notify_scanning() is called whenever the scanning state changed from the
1571 * previously notified state.
1573 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
1576 if (wpa_s->scanning != scanning) {
1577 wpa_s->scanning = scanning;
1578 wpas_notify_scanning(wpa_s);
1583 static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
1589 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
1590 for (i = 0; ie && i < ie[1]; i++) {
1591 if ((ie[i + 2] & 0x7f) > rate)
1592 rate = ie[i + 2] & 0x7f;
1595 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
1596 for (i = 0; ie && i < ie[1]; i++) {
1597 if ((ie[i + 2] & 0x7f) > rate)
1598 rate = ie[i + 2] & 0x7f;
1606 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1607 * @res: Scan result entry
1608 * @ie: Information element identitifier (WLAN_EID_*)
1609 * Returns: Pointer to the information element (id field) or %NULL if not found
1611 * This function returns the first matching information element in the scan
1614 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
1616 return get_ie((const u8 *) (res + 1), res->ie_len, ie);
1621 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1622 * @res: Scan result entry
1623 * @vendor_type: Vendor type (four octets starting the IE payload)
1624 * Returns: Pointer to the information element (id field) or %NULL if not found
1626 * This function returns the first matching information element in the scan
1629 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1632 const u8 *end, *pos;
1634 pos = (const u8 *) (res + 1);
1635 end = pos + res->ie_len;
1637 while (end - pos > 1) {
1638 if (2 + pos[1] > end - pos)
1640 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1641 vendor_type == WPA_GET_BE32(&pos[2]))
1651 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1652 * @res: Scan result entry
1653 * @vendor_type: Vendor type (four octets starting the IE payload)
1654 * Returns: Pointer to the information element (id field) or %NULL if not found
1656 * This function returns the first matching information element in the scan
1659 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1660 * from Beacon frames instead of either Beacon or Probe Response frames.
1662 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
1665 const u8 *end, *pos;
1667 if (res->beacon_ie_len == 0)
1670 pos = (const u8 *) (res + 1);
1672 end = pos + res->beacon_ie_len;
1674 while (end - pos > 1) {
1675 if (2 + pos[1] > end - pos)
1677 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1678 vendor_type == WPA_GET_BE32(&pos[2]))
1688 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1689 * @res: Scan result entry
1690 * @vendor_type: Vendor type (four octets starting the IE payload)
1691 * Returns: Pointer to the information element payload or %NULL if not found
1693 * This function returns concatenated payload of possibly fragmented vendor
1694 * specific information elements in the scan result. The caller is responsible
1695 * for freeing the returned buffer.
1697 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1701 const u8 *end, *pos;
1703 buf = wpabuf_alloc(res->ie_len);
1707 pos = (const u8 *) (res + 1);
1708 end = pos + res->ie_len;
1710 while (end - pos > 1) {
1711 if (2 + pos[1] > end - pos)
1713 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1714 vendor_type == WPA_GET_BE32(&pos[2]))
1715 wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4);
1719 if (wpabuf_len(buf) == 0) {
1729 * Channels with a great SNR can operate at full rate. What is a great SNR?
1730 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1731 * rule of thumb is that any SNR above 20 is good." This one
1732 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
1733 * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a
1734 * conservative value.
1736 #define GREAT_SNR 30
1738 #define IS_5GHZ(n) (n > 4000)
1740 /* Compare function for sorting scan results. Return >0 if @b is considered
1742 static int wpa_scan_result_compar(const void *a, const void *b)
1744 #define MIN(a,b) a < b ? a : b
1745 struct wpa_scan_res **_wa = (void *) a;
1746 struct wpa_scan_res **_wb = (void *) b;
1747 struct wpa_scan_res *wa = *_wa;
1748 struct wpa_scan_res *wb = *_wb;
1750 int snr_a, snr_b, snr_a_full, snr_b_full;
1752 /* WPA/WPA2 support preferred */
1753 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
1754 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
1755 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
1756 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
1758 if (wpa_b && !wpa_a)
1760 if (!wpa_b && wpa_a)
1763 /* privacy support preferred */
1764 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1765 (wb->caps & IEEE80211_CAP_PRIVACY))
1767 if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1768 (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1771 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
1772 snr_a_full = wa->snr;
1773 snr_a = MIN(wa->snr, GREAT_SNR);
1774 snr_b_full = wb->snr;
1775 snr_b = MIN(wb->snr, GREAT_SNR);
1777 /* Level is not in dBm, so we can't calculate
1778 * SNR. Just use raw level (units unknown). */
1779 snr_a = snr_a_full = wa->level;
1780 snr_b = snr_b_full = wb->level;
1783 /* if SNR is close, decide by max rate or frequency band */
1784 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
1785 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
1786 if (wa->est_throughput != wb->est_throughput)
1787 return wb->est_throughput - wa->est_throughput;
1788 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
1789 return IS_5GHZ(wa->freq) ? -1 : 1;
1792 /* all things being equal, use SNR; if SNRs are
1793 * identical, use quality values since some drivers may only report
1794 * that value and leave the signal level zero */
1795 if (snr_b_full == snr_a_full)
1796 return wb->qual - wa->qual;
1797 return snr_b_full - snr_a_full;
1803 /* Compare function for sorting scan results when searching a WPS AP for
1804 * provisioning. Return >0 if @b is considered better. */
1805 static int wpa_scan_result_wps_compar(const void *a, const void *b)
1807 struct wpa_scan_res **_wa = (void *) a;
1808 struct wpa_scan_res **_wb = (void *) b;
1809 struct wpa_scan_res *wa = *_wa;
1810 struct wpa_scan_res *wb = *_wb;
1811 int uses_wps_a, uses_wps_b;
1812 struct wpabuf *wps_a, *wps_b;
1815 /* Optimization - check WPS IE existence before allocated memory and
1816 * doing full reassembly. */
1817 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
1818 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
1819 if (uses_wps_a && !uses_wps_b)
1821 if (!uses_wps_a && uses_wps_b)
1824 if (uses_wps_a && uses_wps_b) {
1825 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
1826 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
1827 res = wps_ap_priority_compar(wps_a, wps_b);
1835 * Do not use current AP security policy as a sorting criteria during
1836 * WPS provisioning step since the AP may get reconfigured at the
1837 * completion of provisioning.
1840 /* all things being equal, use signal level; if signal levels are
1841 * identical, use quality values since some drivers may only report
1842 * that value and leave the signal level zero */
1843 if (wb->level == wa->level)
1844 return wb->qual - wa->qual;
1845 return wb->level - wa->level;
1847 #endif /* CONFIG_WPS */
1850 static void dump_scan_res(struct wpa_scan_results *scan_res)
1852 #ifndef CONFIG_NO_STDOUT_DEBUG
1855 if (scan_res->res == NULL || scan_res->num == 0)
1858 wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
1860 for (i = 0; i < scan_res->num; i++) {
1861 struct wpa_scan_res *r = scan_res->res[i];
1863 if (r->flags & WPA_SCAN_LEVEL_DBM) {
1864 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
1866 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
1867 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
1868 MAC2STR(r->bssid), r->freq, r->qual,
1869 r->noise, noise_valid ? "" : "~", r->level,
1870 r->snr, r->snr >= GREAT_SNR ? "*" : "",
1872 r->age, r->est_throughput);
1874 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
1875 "noise=%d level=%d flags=0x%x age=%u est=%u",
1876 MAC2STR(r->bssid), r->freq, r->qual,
1877 r->noise, r->level, r->flags, r->age,
1880 pos = (u8 *) (r + 1);
1882 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
1884 if (r->beacon_ie_len)
1885 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
1886 pos, r->beacon_ie_len);
1888 #endif /* CONFIG_NO_STDOUT_DEBUG */
1893 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
1894 * @wpa_s: Pointer to wpa_supplicant data
1895 * @bssid: BSSID to check
1896 * Returns: 0 if the BSSID is filtered or 1 if not
1898 * This function is used to filter out specific BSSIDs from scan reslts mainly
1899 * for testing purposes (SET bssid_filter ctrl_iface command).
1901 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
1906 if (wpa_s->bssid_filter == NULL)
1909 for (i = 0; i < wpa_s->bssid_filter_count; i++) {
1910 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
1919 void filter_scan_res(struct wpa_supplicant *wpa_s,
1920 struct wpa_scan_results *res)
1924 if (wpa_s->bssid_filter == NULL)
1927 for (i = 0, j = 0; i < res->num; i++) {
1928 if (wpa_supplicant_filter_bssid_match(wpa_s,
1929 res->res[i]->bssid)) {
1930 res->res[j++] = res->res[i];
1932 os_free(res->res[i]);
1937 if (res->num != j) {
1938 wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
1939 (int) (res->num - j));
1946 * Noise floor values to use when we have signal strength
1947 * measurements, but no noise floor measurements. These values were
1948 * measured in an office environment with many APs.
1950 #define DEFAULT_NOISE_FLOOR_2GHZ (-89)
1951 #define DEFAULT_NOISE_FLOOR_5GHZ (-92)
1953 void scan_snr(struct wpa_scan_res *res)
1955 if (res->flags & WPA_SCAN_NOISE_INVALID) {
1956 res->noise = IS_5GHZ(res->freq) ?
1957 DEFAULT_NOISE_FLOOR_5GHZ :
1958 DEFAULT_NOISE_FLOOR_2GHZ;
1961 if (res->flags & WPA_SCAN_LEVEL_DBM) {
1962 res->snr = res->level - res->noise;
1964 /* Level is not in dBm, so we can't calculate
1965 * SNR. Just use raw level (units unknown). */
1966 res->snr = res->level;
1971 static unsigned int max_ht20_rate(int snr)
1974 return 6500; /* HT20 MCS0 */
1976 return 13000; /* HT20 MCS1 */
1978 return 19500; /* HT20 MCS2 */
1980 return 26000; /* HT20 MCS3 */
1982 return 39000; /* HT20 MCS4 */
1984 return 52000; /* HT20 MCS5 */
1986 return 58500; /* HT20 MCS6 */
1987 return 65000; /* HT20 MCS7 */
1991 static unsigned int max_ht40_rate(int snr)
1994 return 13500; /* HT40 MCS0 */
1996 return 27000; /* HT40 MCS1 */
1998 return 40500; /* HT40 MCS2 */
2000 return 54000; /* HT40 MCS3 */
2002 return 81000; /* HT40 MCS4 */
2004 return 108000; /* HT40 MCS5 */
2006 return 121500; /* HT40 MCS6 */
2007 return 135000; /* HT40 MCS7 */
2011 static unsigned int max_vht80_rate(int snr)
2016 return 29300; /* VHT80 MCS0 */
2018 return 58500; /* VHT80 MCS1 */
2020 return 87800; /* VHT80 MCS2 */
2022 return 117000; /* VHT80 MCS3 */
2024 return 175500; /* VHT80 MCS4 */
2026 return 234000; /* VHT80 MCS5 */
2028 return 263300; /* VHT80 MCS6 */
2030 return 292500; /* VHT80 MCS7 */
2032 return 351000; /* VHT80 MCS8 */
2033 return 390000; /* VHT80 MCS9 */
2037 void scan_est_throughput(struct wpa_supplicant *wpa_s,
2038 struct wpa_scan_res *res)
2040 enum local_hw_capab capab = wpa_s->hw_capab;
2041 int rate; /* max legacy rate in 500 kb/s units */
2043 unsigned int est, tmp;
2046 if (res->est_throughput)
2049 /* Get maximum legacy rate */
2050 rate = wpa_scan_get_max_rate(res);
2052 /* Limit based on estimated SNR */
2053 if (rate > 1 * 2 && snr < 1)
2055 else if (rate > 2 * 2 && snr < 4)
2057 else if (rate > 6 * 2 && snr < 5)
2059 else if (rate > 9 * 2 && snr < 6)
2061 else if (rate > 12 * 2 && snr < 7)
2063 else if (rate > 18 * 2 && snr < 10)
2065 else if (rate > 24 * 2 && snr < 11)
2067 else if (rate > 36 * 2 && snr < 15)
2069 else if (rate > 48 * 2 && snr < 19)
2071 else if (rate > 54 * 2 && snr < 21)
2075 if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2076 ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP);
2078 tmp = max_ht20_rate(snr);
2084 if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2085 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2086 if (ie && ie[1] >= 2 &&
2087 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2088 tmp = max_ht40_rate(snr);
2094 if (capab == CAPAB_VHT) {
2095 /* Use +1 to assume VHT is always faster than HT */
2096 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP);
2098 tmp = max_ht20_rate(snr) + 1;
2102 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2103 if (ie && ie[1] >= 2 &&
2105 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2106 tmp = max_ht40_rate(snr) + 1;
2111 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION);
2112 if (ie && ie[1] >= 1 &&
2113 (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
2114 tmp = max_vht80_rate(snr) + 1;
2121 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
2123 res->est_throughput = est;
2128 * wpa_supplicant_get_scan_results - Get scan results
2129 * @wpa_s: Pointer to wpa_supplicant data
2130 * @info: Information about what was scanned or %NULL if not available
2131 * @new_scan: Whether a new scan was performed
2132 * Returns: Scan results, %NULL on failure
2134 * This function request the current scan results from the driver and updates
2135 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2136 * results with wpa_scan_results_free().
2138 struct wpa_scan_results *
2139 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
2140 struct scan_info *info, int new_scan)
2142 struct wpa_scan_results *scan_res;
2144 int (*compar)(const void *, const void *) = wpa_scan_result_compar;
2146 scan_res = wpa_drv_get_scan_results2(wpa_s);
2147 if (scan_res == NULL) {
2148 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
2151 if (scan_res->fetch_time.sec == 0) {
2153 * Make sure we have a valid timestamp if the driver wrapper
2154 * does not set this.
2156 os_get_reltime(&scan_res->fetch_time);
2158 filter_scan_res(wpa_s, scan_res);
2160 for (i = 0; i < scan_res->num; i++) {
2161 struct wpa_scan_res *scan_res_item = scan_res->res[i];
2163 scan_snr(scan_res_item);
2164 scan_est_throughput(wpa_s, scan_res_item);
2168 if (wpas_wps_searching(wpa_s)) {
2169 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
2170 "provisioning rules");
2171 compar = wpa_scan_result_wps_compar;
2173 #endif /* CONFIG_WPS */
2175 qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
2177 dump_scan_res(scan_res);
2179 wpa_bss_update_start(wpa_s);
2180 for (i = 0; i < scan_res->num; i++)
2181 wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
2182 &scan_res->fetch_time);
2183 wpa_bss_update_end(wpa_s, info, new_scan);
2190 * wpa_supplicant_update_scan_results - Update scan results from the driver
2191 * @wpa_s: Pointer to wpa_supplicant data
2192 * Returns: 0 on success, -1 on failure
2194 * This function updates the BSS table within wpa_supplicant based on the
2195 * currently available scan results from the driver without requesting a new
2196 * scan. This is used in cases where the driver indicates an association
2197 * (including roaming within ESS) and wpa_supplicant does not yet have the
2198 * needed information to complete the connection (e.g., to perform validation
2199 * steps in 4-way handshake).
2201 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
2203 struct wpa_scan_results *scan_res;
2204 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
2205 if (scan_res == NULL)
2207 wpa_scan_results_free(scan_res);
2214 * scan_only_handler - Reports scan results
2216 void scan_only_handler(struct wpa_supplicant *wpa_s,
2217 struct wpa_scan_results *scan_res)
2219 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
2220 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2221 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
2222 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
2223 wpa_s->manual_scan_id);
2224 wpa_s->manual_scan_use_id = 0;
2226 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
2228 wpas_notify_scan_results(wpa_s);
2229 wpas_notify_scan_done(wpa_s, 1);
2230 if (wpa_s->scan_work) {
2231 struct wpa_radio_work *work = wpa_s->scan_work;
2232 wpa_s->scan_work = NULL;
2233 radio_work_done(work);
2236 if (wpa_s->wpa_state == WPA_SCANNING)
2237 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
2241 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
2243 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
2247 struct wpa_driver_scan_params *
2248 wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
2250 struct wpa_driver_scan_params *params;
2254 params = os_zalloc(sizeof(*params));
2258 for (i = 0; i < src->num_ssids; i++) {
2259 if (src->ssids[i].ssid) {
2260 n = os_malloc(src->ssids[i].ssid_len);
2263 os_memcpy(n, src->ssids[i].ssid,
2264 src->ssids[i].ssid_len);
2265 params->ssids[i].ssid = n;
2266 params->ssids[i].ssid_len = src->ssids[i].ssid_len;
2269 params->num_ssids = src->num_ssids;
2271 if (src->extra_ies) {
2272 n = os_malloc(src->extra_ies_len);
2275 os_memcpy(n, src->extra_ies, src->extra_ies_len);
2276 params->extra_ies = n;
2277 params->extra_ies_len = src->extra_ies_len;
2281 int len = int_array_len(src->freqs);
2282 params->freqs = os_malloc((len + 1) * sizeof(int));
2283 if (params->freqs == NULL)
2285 os_memcpy(params->freqs, src->freqs, (len + 1) * sizeof(int));
2288 if (src->filter_ssids) {
2289 params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) *
2290 src->num_filter_ssids);
2291 if (params->filter_ssids == NULL)
2293 os_memcpy(params->filter_ssids, src->filter_ssids,
2294 sizeof(*params->filter_ssids) *
2295 src->num_filter_ssids);
2296 params->num_filter_ssids = src->num_filter_ssids;
2299 params->filter_rssi = src->filter_rssi;
2300 params->p2p_probe = src->p2p_probe;
2301 params->only_new_results = src->only_new_results;
2302 params->low_priority = src->low_priority;
2304 if (src->sched_scan_plans_num > 0) {
2305 params->sched_scan_plans =
2306 os_malloc(sizeof(*src->sched_scan_plans) *
2307 src->sched_scan_plans_num);
2308 if (!params->sched_scan_plans)
2311 os_memcpy(params->sched_scan_plans, src->sched_scan_plans,
2312 sizeof(*src->sched_scan_plans) *
2313 src->sched_scan_plans_num);
2314 params->sched_scan_plans_num = src->sched_scan_plans_num;
2317 if (src->mac_addr_rand) {
2318 params->mac_addr_rand = src->mac_addr_rand;
2320 if (src->mac_addr && src->mac_addr_mask) {
2323 mac_addr = os_malloc(2 * ETH_ALEN);
2327 os_memcpy(mac_addr, src->mac_addr, ETH_ALEN);
2328 os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask,
2330 params->mac_addr = mac_addr;
2331 params->mac_addr_mask = mac_addr + ETH_ALEN;
2338 bssid = os_malloc(ETH_ALEN);
2341 os_memcpy(bssid, src->bssid, ETH_ALEN);
2342 params->bssid = bssid;
2348 wpa_scan_free_params(params);
2353 void wpa_scan_free_params(struct wpa_driver_scan_params *params)
2360 for (i = 0; i < params->num_ssids; i++)
2361 os_free((u8 *) params->ssids[i].ssid);
2362 os_free((u8 *) params->extra_ies);
2363 os_free(params->freqs);
2364 os_free(params->filter_ssids);
2365 os_free(params->sched_scan_plans);
2368 * Note: params->mac_addr_mask points to same memory allocation and
2369 * must not be freed separately.
2371 os_free((u8 *) params->mac_addr);
2373 os_free((u8 *) params->bssid);
2379 int wpas_start_pno(struct wpa_supplicant *wpa_s)
2382 size_t i, num_ssid, num_match_ssid;
2383 struct wpa_ssid *ssid;
2384 struct wpa_driver_scan_params params;
2385 struct sched_scan_plan scan_plan;
2386 unsigned int max_sched_scan_ssids;
2388 if (!wpa_s->sched_scan_supported)
2391 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
2392 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
2394 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
2395 if (max_sched_scan_ssids < 1)
2398 if (wpa_s->pno || wpa_s->pno_sched_pending)
2401 if ((wpa_s->wpa_state > WPA_SCANNING) &&
2402 (wpa_s->wpa_state <= WPA_COMPLETED)) {
2403 wpa_printf(MSG_ERROR, "PNO: In assoc process");
2407 if (wpa_s->wpa_state == WPA_SCANNING) {
2408 wpa_supplicant_cancel_scan(wpa_s);
2409 if (wpa_s->sched_scanning) {
2410 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
2411 "ongoing sched scan");
2412 wpa_supplicant_cancel_sched_scan(wpa_s);
2413 wpa_s->pno_sched_pending = 1;
2418 os_memset(¶ms, 0, sizeof(params));
2420 num_ssid = num_match_ssid = 0;
2421 ssid = wpa_s->conf->ssid;
2423 if (!wpas_network_disabled(wpa_s, ssid)) {
2425 if (ssid->scan_ssid)
2431 if (num_match_ssid == 0) {
2432 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
2436 if (num_match_ssid > num_ssid) {
2437 params.num_ssids++; /* wildcard */
2441 if (num_ssid > max_sched_scan_ssids) {
2442 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
2443 "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
2444 num_ssid = max_sched_scan_ssids;
2447 if (num_match_ssid > wpa_s->max_match_sets) {
2448 num_match_ssid = wpa_s->max_match_sets;
2449 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
2451 params.filter_ssids = os_calloc(num_match_ssid,
2452 sizeof(struct wpa_driver_scan_filter));
2453 if (params.filter_ssids == NULL)
2458 ssid = wpa_s->conf->pssid[prio];
2460 if (!wpas_network_disabled(wpa_s, ssid)) {
2461 if (ssid->scan_ssid && params.num_ssids < num_ssid) {
2462 params.ssids[params.num_ssids].ssid =
2464 params.ssids[params.num_ssids].ssid_len =
2468 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
2470 params.filter_ssids[i].ssid_len = ssid->ssid_len;
2471 params.num_filter_ssids++;
2473 if (i == num_match_ssid)
2478 else if (prio + 1 == wpa_s->conf->num_prio)
2481 ssid = wpa_s->conf->pssid[++prio];
2484 if (wpa_s->conf->filter_rssi)
2485 params.filter_rssi = wpa_s->conf->filter_rssi;
2487 if (wpa_s->sched_scan_plans_num) {
2488 params.sched_scan_plans = wpa_s->sched_scan_plans;
2489 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
2491 /* Set one scan plan that will run infinitely */
2492 if (wpa_s->conf->sched_scan_interval)
2493 scan_plan.interval = wpa_s->conf->sched_scan_interval;
2495 scan_plan.interval = 10;
2497 scan_plan.iterations = 0;
2498 params.sched_scan_plans = &scan_plan;
2499 params.sched_scan_plans_num = 1;
2502 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
2503 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
2504 params.freqs = wpa_s->manual_sched_scan_freqs;
2507 if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) {
2508 params.mac_addr_rand = 1;
2509 if (wpa_s->mac_addr_pno) {
2510 params.mac_addr = wpa_s->mac_addr_pno;
2511 params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN;
2515 ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms);
2516 os_free(params.filter_ssids);
2520 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
2525 int wpas_stop_pno(struct wpa_supplicant *wpa_s)
2532 ret = wpa_supplicant_stop_sched_scan(wpa_s);
2535 wpa_s->pno_sched_pending = 0;
2537 if (wpa_s->wpa_state == WPA_SCANNING)
2538 wpa_supplicant_req_scan(wpa_s, 0, 0);
2544 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
2547 type &= MAC_ADDR_RAND_ALL;
2548 wpa_s->mac_addr_rand_enable &= ~type;
2550 if (type & MAC_ADDR_RAND_SCAN) {
2551 os_free(wpa_s->mac_addr_scan);
2552 wpa_s->mac_addr_scan = NULL;
2555 if (type & MAC_ADDR_RAND_SCHED_SCAN) {
2556 os_free(wpa_s->mac_addr_sched_scan);
2557 wpa_s->mac_addr_sched_scan = NULL;
2560 if (type & MAC_ADDR_RAND_PNO) {
2561 os_free(wpa_s->mac_addr_pno);
2562 wpa_s->mac_addr_pno = NULL;
2567 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
2568 unsigned int type, const u8 *addr,
2573 wpas_mac_addr_rand_scan_clear(wpa_s, type);
2576 tmp = os_malloc(2 * ETH_ALEN);
2579 os_memcpy(tmp, addr, ETH_ALEN);
2580 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
2583 if (type == MAC_ADDR_RAND_SCAN) {
2584 wpa_s->mac_addr_scan = tmp;
2585 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
2586 wpa_s->mac_addr_sched_scan = tmp;
2587 } else if (type == MAC_ADDR_RAND_PNO) {
2588 wpa_s->mac_addr_pno = tmp;
2590 wpa_printf(MSG_INFO,
2591 "scan: Invalid MAC randomization type=0x%x",
2597 wpa_s->mac_addr_rand_enable |= type;
2602 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
2604 int scan_work = !!wpa_s->scan_work;
2607 scan_work |= !!wpa_s->p2p_scan_work;
2608 #endif /* CONFIG_P2P */
2610 if (scan_work && wpa_s->own_scan_running) {
2611 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
2612 return wpa_drv_abort_scan(wpa_s);
2619 int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
2621 struct sched_scan_plan *scan_plans = NULL;
2622 const char *token, *context = NULL;
2623 unsigned int num = 0;
2629 wpa_printf(MSG_DEBUG, "Clear sched scan plans");
2630 os_free(wpa_s->sched_scan_plans);
2631 wpa_s->sched_scan_plans = NULL;
2632 wpa_s->sched_scan_plans_num = 0;
2636 while ((token = cstr_token(cmd, " ", &context))) {
2638 struct sched_scan_plan *scan_plan, *n;
2640 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
2645 scan_plan = &scan_plans[num];
2648 ret = sscanf(token, "%u:%u", &scan_plan->interval,
2649 &scan_plan->iterations);
2650 if (ret <= 0 || ret > 2 || !scan_plan->interval) {
2651 wpa_printf(MSG_ERROR,
2652 "Invalid sched scan plan input: %s", token);
2656 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
2657 wpa_printf(MSG_WARNING,
2658 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
2659 num, scan_plan->interval,
2660 wpa_s->max_sched_scan_plan_interval);
2661 scan_plan->interval =
2662 wpa_s->max_sched_scan_plan_interval;
2666 scan_plan->iterations = 0;
2670 if (!scan_plan->iterations) {
2671 wpa_printf(MSG_ERROR,
2672 "scan plan %u: Number of iterations cannot be zero",
2677 if (scan_plan->iterations >
2678 wpa_s->max_sched_scan_plan_iterations) {
2679 wpa_printf(MSG_WARNING,
2680 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
2681 num, scan_plan->iterations,
2682 wpa_s->max_sched_scan_plan_iterations);
2683 scan_plan->iterations =
2684 wpa_s->max_sched_scan_plan_iterations;
2687 wpa_printf(MSG_DEBUG,
2688 "scan plan %u: interval=%u iterations=%u",
2689 num, scan_plan->interval, scan_plan->iterations);
2693 wpa_printf(MSG_ERROR, "Invalid scan plans entry");
2697 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
2698 wpa_printf(MSG_ERROR,
2699 "All scan plans but the last must specify a number of iterations");
2703 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
2704 num, scan_plans[num - 1].interval);
2706 if (num > wpa_s->max_sched_scan_plans) {
2707 wpa_printf(MSG_WARNING,
2708 "Too many scheduled scan plans (only %u supported)",
2709 wpa_s->max_sched_scan_plans);
2710 wpa_printf(MSG_WARNING,
2711 "Use only the first %u scan plans, and the last one (in infinite loop)",
2712 wpa_s->max_sched_scan_plans - 1);
2713 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
2714 &scan_plans[num - 1], sizeof(*scan_plans));
2715 num = wpa_s->max_sched_scan_plans;
2718 os_free(wpa_s->sched_scan_plans);
2719 wpa_s->sched_scan_plans = scan_plans;
2720 wpa_s->sched_scan_plans_num = num;
2725 os_free(scan_plans);
2726 wpa_printf(MSG_ERROR, "invalid scan plans list");