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
)
120 int min_temp_disabled
= 0;
123 if (!wpas_network_disabled(wpa_s
, ssid
)) {
124 int temp_disabled
= wpas_temp_disabled(wpa_s
, ssid
);
126 if (temp_disabled
<= 0)
129 if (!min_temp_disabled
||
130 temp_disabled
< min_temp_disabled
)
131 min_temp_disabled
= temp_disabled
;
136 /* ap_scan=2 mode - try to associate with each SSID. */
138 wpa_dbg(wpa_s
, MSG_DEBUG
, "wpa_supplicant_assoc_try: Reached "
139 "end of scan list - go back to beginning");
140 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
141 wpa_supplicant_req_scan(wpa_s
, min_temp_disabled
, 0);
145 /* Continue from the next SSID on the next attempt. */
146 wpa_s
->prev_scan_ssid
= ssid
;
148 /* Start from the beginning of the SSID list. */
149 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
151 wpa_supplicant_associate(wpa_s
, NULL
, ssid
);
155 static void wpas_trigger_scan_cb(struct wpa_radio_work
*work
, int deinit
)
157 struct wpa_supplicant
*wpa_s
= work
->wpa_s
;
158 struct wpa_driver_scan_params
*params
= work
->ctx
;
162 if (!work
->started
) {
163 wpa_scan_free_params(params
);
166 wpa_supplicant_notify_scanning(wpa_s
, 0);
167 wpas_notify_scan_done(wpa_s
, 0);
168 wpa_s
->scan_work
= NULL
;
172 if (wpas_update_random_addr_disassoc(wpa_s
) < 0) {
173 wpa_msg(wpa_s
, MSG_INFO
,
174 "Failed to assign random MAC address for a scan");
175 wpa_scan_free_params(params
);
176 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_FAILED
"ret=-1");
177 radio_work_done(work
);
181 wpa_supplicant_notify_scanning(wpa_s
, 1);
183 if (wpa_s
->clear_driver_scan_cache
) {
184 wpa_printf(MSG_DEBUG
,
185 "Request driver to clear scan cache due to local BSS flush");
186 params
->only_new_results
= 1;
188 ret
= wpa_drv_scan(wpa_s
, params
);
190 * Store the obtained vendor scan cookie (if any) in wpa_s context.
191 * The current design is to allow only one scan request on each
192 * interface, hence having this scan cookie stored in wpa_s context is
195 * Revisit this logic if concurrent scan operations per interface
199 wpa_s
->curr_scan_cookie
= params
->scan_cookie
;
200 wpa_scan_free_params(params
);
203 int retry
= wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
204 !wpa_s
->beacon_rep_data
.token
;
206 if (wpa_s
->disconnected
)
209 wpa_supplicant_notify_scanning(wpa_s
, 0);
210 wpas_notify_scan_done(wpa_s
, 0);
211 if (wpa_s
->wpa_state
== WPA_SCANNING
)
212 wpa_supplicant_set_state(wpa_s
,
213 wpa_s
->scan_prev_wpa_state
);
214 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_FAILED
"ret=%d%s",
215 ret
, retry
? " retry=1" : "");
216 radio_work_done(work
);
219 /* Restore scan_req since we will try to scan again */
220 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
221 wpa_supplicant_req_scan(wpa_s
, 1, 0);
222 } else if (wpa_s
->scan_res_handler
) {
223 /* Clear the scan_res_handler */
224 wpa_s
->scan_res_handler
= NULL
;
227 if (wpa_s
->beacon_rep_data
.token
)
228 wpas_rrm_refuse_request(wpa_s
);
233 os_get_reltime(&wpa_s
->scan_trigger_time
);
235 wpa_s
->normal_scans
++;
236 wpa_s
->own_scan_requested
= 1;
237 wpa_s
->clear_driver_scan_cache
= 0;
238 wpa_s
->scan_work
= work
;
243 * wpa_supplicant_trigger_scan - Request driver to start a scan
244 * @wpa_s: Pointer to wpa_supplicant data
245 * @params: Scan parameters
246 * Returns: 0 on success, -1 on failure
248 int wpa_supplicant_trigger_scan(struct wpa_supplicant
*wpa_s
,
249 struct wpa_driver_scan_params
*params
)
251 struct wpa_driver_scan_params
*ctx
;
253 if (wpa_s
->scan_work
) {
254 wpa_dbg(wpa_s
, MSG_INFO
, "Reject scan trigger since one is already pending");
258 ctx
= wpa_scan_clone_params(params
);
260 radio_add_work(wpa_s
, 0, "scan", 0, wpas_trigger_scan_cb
, ctx
) < 0)
262 wpa_scan_free_params(ctx
);
263 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_FAILED
"ret=-1");
272 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
274 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
276 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting delayed sched scan");
278 if (wpa_supplicant_req_sched_scan(wpa_s
))
279 wpa_supplicant_req_scan(wpa_s
, 0, 0);
284 wpa_supplicant_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
286 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
288 wpa_dbg(wpa_s
, MSG_DEBUG
, "Sched scan timeout - stopping it");
290 wpa_s
->sched_scan_timed_out
= 1;
291 wpa_supplicant_cancel_sched_scan(wpa_s
);
296 wpa_supplicant_start_sched_scan(struct wpa_supplicant
*wpa_s
,
297 struct wpa_driver_scan_params
*params
)
301 wpa_supplicant_notify_scanning(wpa_s
, 1);
302 ret
= wpa_drv_sched_scan(wpa_s
, params
);
304 wpa_supplicant_notify_scanning(wpa_s
, 0);
306 wpa_s
->sched_scanning
= 1;
312 static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant
*wpa_s
)
316 ret
= wpa_drv_stop_sched_scan(wpa_s
);
318 wpa_dbg(wpa_s
, MSG_DEBUG
, "stopping sched_scan failed!");
319 /* TODO: what to do if stopping fails? */
327 static struct wpa_driver_scan_filter
*
328 wpa_supplicant_build_filter_ssids(struct wpa_config
*conf
, size_t *num_ssids
)
330 struct wpa_driver_scan_filter
*ssids
;
331 struct wpa_ssid
*ssid
;
335 if (!conf
->filter_ssids
)
338 for (count
= 0, ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
339 if (ssid
->ssid
&& ssid
->ssid_len
)
344 ssids
= os_calloc(count
, sizeof(struct wpa_driver_scan_filter
));
348 for (ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
349 if (!ssid
->ssid
|| !ssid
->ssid_len
)
351 os_memcpy(ssids
[*num_ssids
].ssid
, ssid
->ssid
, ssid
->ssid_len
);
352 ssids
[*num_ssids
].ssid_len
= ssid
->ssid_len
;
360 static void wpa_supplicant_optimize_freqs(
361 struct wpa_supplicant
*wpa_s
, struct wpa_driver_scan_params
*params
)
364 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_provisioning
&&
366 /* Optimize provisioning state scan based on GO information */
367 if (wpa_s
->p2p_in_provisioning
< 5 &&
368 wpa_s
->go_params
->freq
> 0) {
369 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO "
370 "preferred frequency %d MHz",
371 wpa_s
->go_params
->freq
);
372 params
->freqs
= os_calloc(2, sizeof(int));
374 params
->freqs
[0] = wpa_s
->go_params
->freq
;
375 } else if (wpa_s
->p2p_in_provisioning
< 8 &&
376 wpa_s
->go_params
->freq_list
[0]) {
377 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only common "
379 int_array_concat(¶ms
->freqs
,
380 wpa_s
->go_params
->freq_list
);
382 int_array_sort_unique(params
->freqs
);
384 wpa_s
->p2p_in_provisioning
++;
387 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_invitation
) {
389 * Optimize scan based on GO information during persistent
392 if (wpa_s
->p2p_in_invitation
< 5 &&
393 wpa_s
->p2p_invite_go_freq
> 0) {
394 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO preferred frequency %d MHz during invitation",
395 wpa_s
->p2p_invite_go_freq
);
396 params
->freqs
= os_calloc(2, sizeof(int));
398 params
->freqs
[0] = wpa_s
->p2p_invite_go_freq
;
400 wpa_s
->p2p_in_invitation
++;
401 if (wpa_s
->p2p_in_invitation
> 20) {
403 * This should not really happen since the variable is
404 * cleared on group removal, but if it does happen, make
405 * sure we do not get stuck in special invitation scan
408 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Clear p2p_in_invitation");
409 wpa_s
->p2p_in_invitation
= 0;
412 #endif /* CONFIG_P2P */
415 if (params
->freqs
== NULL
&& wpa_s
->after_wps
&& wpa_s
->wps_freq
) {
417 * Optimize post-provisioning scan based on channel used
418 * during provisioning.
420 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz "
421 "that was used during provisioning", wpa_s
->wps_freq
);
422 params
->freqs
= os_calloc(2, sizeof(int));
424 params
->freqs
[0] = wpa_s
->wps_freq
;
426 } else if (wpa_s
->after_wps
)
429 if (params
->freqs
== NULL
&& wpa_s
->known_wps_freq
&& wpa_s
->wps_freq
)
431 /* Optimize provisioning scan based on already known channel */
432 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz",
434 params
->freqs
= os_calloc(2, sizeof(int));
436 params
->freqs
[0] = wpa_s
->wps_freq
;
437 wpa_s
->known_wps_freq
= 0; /* only do this once */
439 #endif /* CONFIG_WPS */
443 #ifdef CONFIG_INTERWORKING
444 static void wpas_add_interworking_elements(struct wpa_supplicant
*wpa_s
,
447 wpabuf_put_u8(buf
, WLAN_EID_INTERWORKING
);
448 wpabuf_put_u8(buf
, is_zero_ether_addr(wpa_s
->conf
->hessid
) ? 1 :
450 wpabuf_put_u8(buf
, wpa_s
->conf
->access_network_type
);
452 if (!is_zero_ether_addr(wpa_s
->conf
->hessid
))
453 wpabuf_put_data(buf
, wpa_s
->conf
->hessid
, ETH_ALEN
);
455 #endif /* CONFIG_INTERWORKING */
459 static void wpas_fils_req_param_add_max_channel(struct wpa_supplicant
*wpa_s
,
462 if (wpabuf_resize(ie
, 5)) {
463 wpa_printf(MSG_DEBUG
,
464 "Failed to allocate space for FILS Request Parameters element");
468 /* FILS Request Parameters element */
469 wpabuf_put_u8(*ie
, WLAN_EID_EXTENSION
);
470 wpabuf_put_u8(*ie
, 3); /* FILS Request attribute length */
471 wpabuf_put_u8(*ie
, WLAN_EID_EXT_FILS_REQ_PARAMS
);
472 /* Parameter control bitmap */
473 wpabuf_put_u8(*ie
, 0);
474 /* Max Channel Time field - contains the value of MaxChannelTime
475 * parameter of the MLME-SCAN.request primitive represented in units of
476 * TUs, as an unsigned integer. A Max Channel Time field value of 255
477 * is used to indicate any duration of more than 254 TUs, or an
478 * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178)
480 wpabuf_put_u8(*ie
, 255);
482 #endif /* CONFIG_MBO */
485 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant
*wpa_s
)
487 struct wpabuf
*default_ies
= NULL
;
490 enum wpa_driver_if_type type
= WPA_IF_STATION
;
493 if (wpa_s
->p2p_group_interface
== P2P_GROUP_INTERFACE_CLIENT
)
494 type
= WPA_IF_P2P_CLIENT
;
495 #endif /* CONFIG_P2P */
497 wpa_drv_get_ext_capa(wpa_s
, type
);
499 ext_capab_len
= wpas_build_ext_capab(wpa_s
, ext_capab
,
501 if (ext_capab_len
> 0 &&
502 wpabuf_resize(&default_ies
, ext_capab_len
) == 0)
503 wpabuf_put_data(default_ies
, ext_capab
, ext_capab_len
);
506 if (wpa_s
->enable_oce
& OCE_STA
)
507 wpas_fils_req_param_add_max_channel(wpa_s
, &default_ies
);
508 /* Send MBO and OCE capabilities */
509 if (wpabuf_resize(&default_ies
, 12) == 0)
510 wpas_mbo_scan_ie(wpa_s
, default_ies
);
511 #endif /* CONFIG_MBO */
514 wpa_drv_set_default_scan_ies(wpa_s
, wpabuf_head(default_ies
),
515 wpabuf_len(default_ies
));
516 wpabuf_free(default_ies
);
520 static struct wpabuf
* wpa_supplicant_extra_ies(struct wpa_supplicant
*wpa_s
)
522 struct wpabuf
*extra_ie
= NULL
;
527 enum wps_request_type req_type
= WPS_REQ_ENROLLEE_INFO
;
528 #endif /* CONFIG_WPS */
531 if (wpa_s
->p2p_group_interface
== P2P_GROUP_INTERFACE_CLIENT
)
532 wpa_drv_get_ext_capa(wpa_s
, WPA_IF_P2P_CLIENT
);
534 #endif /* CONFIG_P2P */
535 wpa_drv_get_ext_capa(wpa_s
, WPA_IF_STATION
);
537 ext_capab_len
= wpas_build_ext_capab(wpa_s
, ext_capab
,
539 if (ext_capab_len
> 0 &&
540 wpabuf_resize(&extra_ie
, ext_capab_len
) == 0)
541 wpabuf_put_data(extra_ie
, ext_capab
, ext_capab_len
);
543 #ifdef CONFIG_INTERWORKING
544 if (wpa_s
->conf
->interworking
&&
545 wpabuf_resize(&extra_ie
, 100) == 0)
546 wpas_add_interworking_elements(wpa_s
, extra_ie
);
547 #endif /* CONFIG_INTERWORKING */
550 if (wpa_s
->enable_oce
& OCE_STA
)
551 wpas_fils_req_param_add_max_channel(wpa_s
, &extra_ie
);
552 #endif /* CONFIG_MBO */
555 wps
= wpas_wps_in_use(wpa_s
, &req_type
);
558 struct wpabuf
*wps_ie
;
559 wps_ie
= wps_build_probe_req_ie(wps
== 2 ? DEV_PW_PUSHBUTTON
:
562 wpa_s
->wps
->uuid
, req_type
,
565 if (wpabuf_resize(&extra_ie
, wpabuf_len(wps_ie
)) == 0)
566 wpabuf_put_buf(extra_ie
, wps_ie
);
573 size_t ielen
= p2p_scan_ie_buf_len(wpa_s
->global
->p2p
);
574 if (wpabuf_resize(&extra_ie
, ielen
) == 0)
575 wpas_p2p_scan_ie(wpa_s
, extra_ie
);
577 #endif /* CONFIG_P2P */
579 wpa_supplicant_mesh_add_scan_ie(wpa_s
, &extra_ie
);
581 #endif /* CONFIG_WPS */
584 if (wpa_s
->conf
->hs20
&& wpabuf_resize(&extra_ie
, 7) == 0)
585 wpas_hs20_add_indication(extra_ie
, -1, 0);
586 #endif /* CONFIG_HS20 */
589 if (wpa_s
->fst_ies
&&
590 wpabuf_resize(&extra_ie
, wpabuf_len(wpa_s
->fst_ies
)) == 0)
591 wpabuf_put_buf(extra_ie
, wpa_s
->fst_ies
);
592 #endif /* CONFIG_FST */
595 /* Send MBO and OCE capabilities */
596 if (wpabuf_resize(&extra_ie
, 12) == 0)
597 wpas_mbo_scan_ie(wpa_s
, extra_ie
);
598 #endif /* CONFIG_MBO */
600 if (wpa_s
->vendor_elem
[VENDOR_ELEM_PROBE_REQ
]) {
601 struct wpabuf
*buf
= wpa_s
->vendor_elem
[VENDOR_ELEM_PROBE_REQ
];
603 if (wpabuf_resize(&extra_ie
, wpabuf_len(buf
)) == 0)
604 wpabuf_put_buf(extra_ie
, buf
);
614 * Check whether there are any enabled networks or credentials that could be
615 * used for a non-P2P connection.
617 static int non_p2p_network_enabled(struct wpa_supplicant
*wpa_s
)
619 struct wpa_ssid
*ssid
;
621 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
622 if (wpas_network_disabled(wpa_s
, ssid
))
624 if (!ssid
->p2p_group
)
628 if (wpa_s
->conf
->cred
&& wpa_s
->conf
->interworking
&&
629 wpa_s
->conf
->auto_interworking
)
635 #endif /* CONFIG_P2P */
638 static void wpa_setband_scan_freqs_list(struct wpa_supplicant
*wpa_s
,
639 enum hostapd_hw_mode band
,
640 struct wpa_driver_scan_params
*params
)
642 /* Include only supported channels for the specified band */
643 struct hostapd_hw_modes
*mode
;
646 mode
= get_mode(wpa_s
->hw
.modes
, wpa_s
->hw
.num_modes
, band
);
648 /* No channels supported in this band - use empty list */
649 params
->freqs
= os_zalloc(sizeof(int));
653 params
->freqs
= os_calloc(mode
->num_channels
+ 1, sizeof(int));
654 if (params
->freqs
== NULL
)
656 for (count
= 0, i
= 0; i
< mode
->num_channels
; i
++) {
657 if (mode
->channels
[i
].flag
& HOSTAPD_CHAN_DISABLED
)
659 params
->freqs
[count
++] = mode
->channels
[i
].freq
;
664 static void wpa_setband_scan_freqs(struct wpa_supplicant
*wpa_s
,
665 struct wpa_driver_scan_params
*params
)
667 if (wpa_s
->hw
.modes
== NULL
)
668 return; /* unknown what channels the driver supports */
670 return; /* already using a limited channel set */
671 if (wpa_s
->setband
== WPA_SETBAND_5G
)
672 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211A
,
674 else if (wpa_s
->setband
== WPA_SETBAND_2G
)
675 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211G
,
680 static void wpa_add_scan_ssid(struct wpa_supplicant
*wpa_s
,
681 struct wpa_driver_scan_params
*params
,
682 size_t max_ssids
, const u8
*ssid
, size_t ssid_len
)
686 for (j
= 0; j
< params
->num_ssids
; j
++) {
687 if (params
->ssids
[j
].ssid_len
== ssid_len
&&
688 params
->ssids
[j
].ssid
&&
689 os_memcmp(params
->ssids
[j
].ssid
, ssid
, ssid_len
) == 0)
690 return; /* already in the list */
693 if (params
->num_ssids
+ 1 > max_ssids
) {
694 wpa_printf(MSG_DEBUG
, "Over max scan SSIDs for manual request");
698 wpa_printf(MSG_DEBUG
, "Scan SSID (manual request): %s",
699 wpa_ssid_txt(ssid
, ssid_len
));
701 params
->ssids
[params
->num_ssids
].ssid
= ssid
;
702 params
->ssids
[params
->num_ssids
].ssid_len
= ssid_len
;
707 static void wpa_add_owe_scan_ssid(struct wpa_supplicant
*wpa_s
,
708 struct wpa_driver_scan_params
*params
,
709 struct wpa_ssid
*ssid
, size_t max_ssids
)
714 if (!(ssid
->key_mgmt
& WPA_KEY_MGMT_OWE
))
717 wpa_printf(MSG_DEBUG
, "OWE: Look for transition mode AP. ssid=%s",
718 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
720 dl_list_for_each(bss
, &wpa_s
->bss
, struct wpa_bss
, list
) {
721 const u8
*owe
, *pos
, *end
;
725 if (bss
->ssid_len
!= ssid
->ssid_len
||
726 os_memcmp(bss
->ssid
, ssid
->ssid
, ssid
->ssid_len
) != 0)
729 owe
= wpa_bss_get_vendor_ie(bss
, OWE_IE_VENDOR_TYPE
);
730 if (!owe
|| owe
[1] < 4)
734 end
= owe
+ 2 + owe
[1];
736 /* Must include BSSID and ssid_len */
737 if (end
- pos
< ETH_ALEN
+ 1)
742 owe_ssid_len
= *pos
++;
745 if ((size_t) (end
- pos
) < owe_ssid_len
||
746 owe_ssid_len
> SSID_MAX_LEN
)
749 wpa_printf(MSG_DEBUG
,
750 "OWE: scan_ssids: transition mode OWE ssid=%s",
751 wpa_ssid_txt(owe_ssid
, owe_ssid_len
));
753 wpa_add_scan_ssid(wpa_s
, params
, max_ssids
,
754 owe_ssid
, owe_ssid_len
);
757 #endif /* CONFIG_OWE */
761 static void wpa_set_scan_ssids(struct wpa_supplicant
*wpa_s
,
762 struct wpa_driver_scan_params
*params
,
766 struct wpa_ssid
*ssid
;
769 * For devices with max_ssids greater than 1, leave the last slot empty
770 * for adding the wildcard scan entry.
772 max_ssids
= max_ssids
> 1 ? max_ssids
- 1 : max_ssids
;
774 for (i
= 0; i
< wpa_s
->scan_id_count
; i
++) {
775 ssid
= wpa_config_get_network(wpa_s
->conf
, wpa_s
->scan_id
[i
]);
779 wpa_add_scan_ssid(wpa_s
, params
, max_ssids
,
780 ssid
->ssid
, ssid
->ssid_len
);
782 * Also add the SSID of the OWE BSS, to allow discovery of
783 * transition mode APs more quickly.
785 wpa_add_owe_scan_ssid(wpa_s
, params
, ssid
, max_ssids
);
788 wpa_s
->scan_id_count
= 0;
792 static int wpa_set_ssids_from_scan_req(struct wpa_supplicant
*wpa_s
,
793 struct wpa_driver_scan_params
*params
,
798 if (wpa_s
->ssids_from_scan_req
== NULL
||
799 wpa_s
->num_ssids_from_scan_req
== 0)
802 if (wpa_s
->num_ssids_from_scan_req
> max_ssids
) {
803 wpa_s
->num_ssids_from_scan_req
= max_ssids
;
804 wpa_printf(MSG_DEBUG
, "Over max scan SSIDs from scan req: %u",
805 (unsigned int) max_ssids
);
808 for (i
= 0; i
< wpa_s
->num_ssids_from_scan_req
; i
++) {
809 params
->ssids
[i
].ssid
= wpa_s
->ssids_from_scan_req
[i
].ssid
;
810 params
->ssids
[i
].ssid_len
=
811 wpa_s
->ssids_from_scan_req
[i
].ssid_len
;
812 wpa_hexdump_ascii(MSG_DEBUG
, "specific SSID",
813 params
->ssids
[i
].ssid
,
814 params
->ssids
[i
].ssid_len
);
817 params
->num_ssids
= wpa_s
->num_ssids_from_scan_req
;
818 wpa_s
->num_ssids_from_scan_req
= 0;
823 static void wpa_supplicant_scan(void *eloop_ctx
, void *timeout_ctx
)
825 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
826 struct wpa_ssid
*ssid
;
827 int ret
, p2p_in_prog
;
828 struct wpabuf
*extra_ie
= NULL
;
829 struct wpa_driver_scan_params params
;
830 struct wpa_driver_scan_params
*scan_params
;
832 int connect_without_scan
= 0;
834 wpa_s
->ignore_post_flush_scan_res
= 0;
836 if (wpa_s
->wpa_state
== WPA_INTERFACE_DISABLED
) {
837 wpa_dbg(wpa_s
, MSG_DEBUG
, "Skip scan - interface disabled");
841 if (wpa_s
->disconnected
&& wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
842 wpa_dbg(wpa_s
, MSG_DEBUG
, "Disconnected - do not scan");
843 wpa_supplicant_set_state(wpa_s
, WPA_DISCONNECTED
);
847 if (wpa_s
->scanning
) {
849 * If we are already in scanning state, we shall reschedule the
850 * the incoming scan request.
852 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already scanning - Reschedule the incoming scan req");
853 wpa_supplicant_req_scan(wpa_s
, 1, 0);
857 if (!wpa_supplicant_enabled_networks(wpa_s
) &&
858 wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
859 wpa_dbg(wpa_s
, MSG_DEBUG
, "No enabled networks - do not scan");
860 wpa_supplicant_set_state(wpa_s
, WPA_INACTIVE
);
864 if (wpa_s
->conf
->ap_scan
!= 0 &&
865 (wpa_s
->drv_flags
& WPA_DRIVER_FLAGS_WIRED
)) {
866 wpa_dbg(wpa_s
, MSG_DEBUG
, "Using wired authentication - "
867 "overriding ap_scan configuration");
868 wpa_s
->conf
->ap_scan
= 0;
869 wpas_notify_ap_scan_changed(wpa_s
);
872 if (wpa_s
->conf
->ap_scan
== 0) {
873 wpa_supplicant_gen_assoc_event(wpa_s
);
878 if (wpa_s
->scan_req
!= MANUAL_SCAN_REQ
&&
879 wpa_s
->connect_without_scan
) {
880 connect_without_scan
= 1;
881 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
882 if (ssid
== wpa_s
->connect_without_scan
)
887 p2p_in_prog
= wpas_p2p_in_progress(wpa_s
);
888 if (p2p_in_prog
&& p2p_in_prog
!= 2 &&
890 (ssid
->mode
!= WPAS_MODE_AP
&& ssid
->mode
!= WPAS_MODE_P2P_GO
))) {
891 wpa_dbg(wpa_s
, MSG_DEBUG
, "Delay station mode scan while P2P operation is in progress");
892 wpa_supplicant_req_scan(wpa_s
, 5, 0);
897 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are
898 * used for changing modes inside wpa_supplicant (roaming,
899 * auto-reconnect, etc). Discarding the scan might hurt these processes.
900 * The normal use case for PNO is to suspend the host immediately after
901 * starting PNO, so the periodic 100 ms attempts to run the scan do not
902 * normally happen in practice multiple times, i.e., this is simply
903 * restarting scanning once the host is woken up and PNO stopped.
905 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
) {
906 wpa_dbg(wpa_s
, MSG_DEBUG
, "Defer scan - PNO is in progress");
907 wpa_supplicant_req_scan(wpa_s
, 0, 100000);
911 if (wpa_s
->conf
->ap_scan
== 2)
914 max_ssids
= wpa_s
->max_scan_ssids
;
915 if (max_ssids
> WPAS_MAX_SCAN_SSIDS
)
916 max_ssids
= WPAS_MAX_SCAN_SSIDS
;
919 wpa_s
->last_scan_req
= wpa_s
->scan_req
;
920 wpa_s
->scan_req
= NORMAL_SCAN_REQ
;
922 if (connect_without_scan
) {
923 wpa_s
->connect_without_scan
= NULL
;
925 wpa_printf(MSG_DEBUG
, "Start a pre-selected network "
926 "without scan step");
927 wpa_supplicant_associate(wpa_s
, NULL
, ssid
);
932 os_memset(¶ms
, 0, sizeof(params
));
934 wpa_s
->scan_prev_wpa_state
= wpa_s
->wpa_state
;
935 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
936 wpa_s
->wpa_state
== WPA_INACTIVE
)
937 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
940 * If autoscan has set its own scanning parameters
942 if (wpa_s
->autoscan_params
!= NULL
) {
943 scan_params
= wpa_s
->autoscan_params
;
947 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
948 wpa_set_ssids_from_scan_req(wpa_s
, ¶ms
, max_ssids
)) {
949 wpa_printf(MSG_DEBUG
, "Use specific SSIDs from SCAN command");
954 if ((wpa_s
->p2p_in_provisioning
|| wpa_s
->show_group_started
) &&
955 wpa_s
->go_params
&& !wpa_s
->conf
->passive_scan
) {
956 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
957 wpa_s
->p2p_in_provisioning
,
958 wpa_s
->show_group_started
);
959 params
.ssids
[0].ssid
= wpa_s
->go_params
->ssid
;
960 params
.ssids
[0].ssid_len
= wpa_s
->go_params
->ssid_len
;
961 params
.num_ssids
= 1;
965 if (wpa_s
->p2p_in_invitation
) {
966 if (wpa_s
->current_ssid
) {
967 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during invitation");
968 params
.ssids
[0].ssid
= wpa_s
->current_ssid
->ssid
;
969 params
.ssids
[0].ssid_len
=
970 wpa_s
->current_ssid
->ssid_len
;
971 params
.num_ssids
= 1;
973 wpa_printf(MSG_DEBUG
, "P2P: No specific SSID known for scan during invitation");
977 #endif /* CONFIG_P2P */
979 /* Find the starting point from which to continue scanning */
980 ssid
= wpa_s
->conf
->ssid
;
981 if (wpa_s
->prev_scan_ssid
!= WILDCARD_SSID_SCAN
) {
983 if (ssid
== wpa_s
->prev_scan_ssid
) {
991 if (wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
994 #endif /* CONFIG_AP */
995 wpa_s
->conf
->ap_scan
== 2) {
996 wpa_s
->connect_without_scan
= NULL
;
997 wpa_s
->prev_scan_wildcard
= 0;
998 wpa_supplicant_assoc_try(wpa_s
, ssid
);
1000 } else if (wpa_s
->conf
->ap_scan
== 2) {
1002 * User-initiated scan request in ap_scan == 2; scan with
1006 } else if (wpa_s
->reattach
&& wpa_s
->current_ssid
!= NULL
) {
1008 * Perform single-channel single-SSID scan for
1009 * reassociate-to-same-BSS operation.
1012 ssid
= wpa_s
->current_ssid
;
1013 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
1014 ssid
->ssid
, ssid
->ssid_len
);
1015 params
.ssids
[0].ssid
= ssid
->ssid
;
1016 params
.ssids
[0].ssid_len
= ssid
->ssid_len
;
1017 params
.num_ssids
= 1;
1020 * Allocate memory for frequency array, allocate one extra
1021 * slot for the zero-terminator.
1023 params
.freqs
= os_malloc(sizeof(int) * 2);
1025 params
.freqs
[0] = wpa_s
->assoc_freq
;
1026 params
.freqs
[1] = 0;
1030 * Reset the reattach flag so that we fall back to full scan if
1033 wpa_s
->reattach
= 0;
1035 struct wpa_ssid
*start
= ssid
, *tssid
;
1037 if (ssid
== NULL
&& max_ssids
> 1)
1038 ssid
= wpa_s
->conf
->ssid
;
1040 if (!wpas_network_disabled(wpa_s
, ssid
) &&
1042 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
1043 ssid
->ssid
, ssid
->ssid_len
);
1044 params
.ssids
[params
.num_ssids
].ssid
=
1046 params
.ssids
[params
.num_ssids
].ssid_len
=
1049 if (params
.num_ssids
+ 1 >= max_ssids
)
1053 if (!wpas_network_disabled(wpa_s
, ssid
)) {
1055 * Also add the SSID of the OWE BSS, to allow
1056 * discovery of transition mode APs more
1059 wpa_add_owe_scan_ssid(wpa_s
, ¶ms
, ssid
,
1066 if (ssid
== NULL
&& max_ssids
> 1 &&
1067 start
!= wpa_s
->conf
->ssid
)
1068 ssid
= wpa_s
->conf
->ssid
;
1071 if (wpa_s
->scan_id_count
&&
1072 wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
)
1073 wpa_set_scan_ssids(wpa_s
, ¶ms
, max_ssids
);
1075 for (tssid
= wpa_s
->conf
->ssid
;
1076 wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&& tssid
;
1077 tssid
= tssid
->next
) {
1078 if (wpas_network_disabled(wpa_s
, tssid
))
1080 if ((params
.freqs
|| !freqs_set
) && tssid
->scan_freq
) {
1081 int_array_concat(¶ms
.freqs
,
1084 os_free(params
.freqs
);
1085 params
.freqs
= NULL
;
1089 int_array_sort_unique(params
.freqs
);
1092 if (ssid
&& max_ssids
== 1) {
1094 * If the driver is limited to 1 SSID at a time interleave
1095 * wildcard SSID scans with specific SSID scans to avoid
1096 * waiting a long time for a wildcard scan.
1098 if (!wpa_s
->prev_scan_wildcard
) {
1099 params
.ssids
[0].ssid
= NULL
;
1100 params
.ssids
[0].ssid_len
= 0;
1101 wpa_s
->prev_scan_wildcard
= 1;
1102 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for "
1103 "wildcard SSID (Interleave with specific)");
1105 wpa_s
->prev_scan_ssid
= ssid
;
1106 wpa_s
->prev_scan_wildcard
= 0;
1107 wpa_dbg(wpa_s
, MSG_DEBUG
,
1108 "Starting AP scan for specific SSID: %s",
1109 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1114 wpa_s
->prev_scan_ssid
= ssid
;
1115 wpa_dbg(wpa_s
, MSG_DEBUG
, "Include wildcard SSID in "
1116 "the scan request");
1118 } else if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
1119 wpa_s
->manual_scan_passive
&& params
.num_ssids
== 0) {
1120 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use passive scan based on manual request");
1121 } else if (wpa_s
->conf
->passive_scan
) {
1122 wpa_dbg(wpa_s
, MSG_DEBUG
,
1123 "Use passive scan based on configuration");
1125 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
1127 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for wildcard "
1132 wpa_supplicant_optimize_freqs(wpa_s
, ¶ms
);
1133 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
1135 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
1136 wpa_s
->manual_scan_only_new
) {
1137 wpa_printf(MSG_DEBUG
,
1138 "Request driver to clear scan cache due to manual only_new=1 scan");
1139 params
.only_new_results
= 1;
1142 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
== NULL
&&
1143 wpa_s
->manual_scan_freqs
) {
1144 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit manual scan to specified channels");
1145 params
.freqs
= wpa_s
->manual_scan_freqs
;
1146 wpa_s
->manual_scan_freqs
= NULL
;
1149 if (params
.freqs
== NULL
&& wpa_s
->select_network_scan_freqs
) {
1150 wpa_dbg(wpa_s
, MSG_DEBUG
,
1151 "Limit select_network scan to specified channels");
1152 params
.freqs
= wpa_s
->select_network_scan_freqs
;
1153 wpa_s
->select_network_scan_freqs
= NULL
;
1156 if (params
.freqs
== NULL
&& wpa_s
->next_scan_freqs
) {
1157 wpa_dbg(wpa_s
, MSG_DEBUG
, "Optimize scan based on previously "
1158 "generated frequency list");
1159 params
.freqs
= wpa_s
->next_scan_freqs
;
1161 os_free(wpa_s
->next_scan_freqs
);
1162 wpa_s
->next_scan_freqs
= NULL
;
1163 wpa_setband_scan_freqs(wpa_s
, ¶ms
);
1165 /* See if user specified frequencies. If so, scan only those. */
1166 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
1167 wpa_dbg(wpa_s
, MSG_DEBUG
,
1168 "Optimize scan based on conf->freq_list");
1169 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
1172 /* Use current associated channel? */
1173 if (wpa_s
->conf
->scan_cur_freq
&& !params
.freqs
) {
1174 unsigned int num
= wpa_s
->num_multichan_concurrent
;
1176 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
1178 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
1180 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the "
1181 "current operating channels since "
1182 "scan_cur_freq is enabled");
1184 os_free(params
.freqs
);
1185 params
.freqs
= NULL
;
1191 if (wpa_s
->enable_oce
& OCE_STA
)
1192 params
.oce_scan
= 1;
1193 #endif /* CONFIG_MBO */
1195 params
.filter_ssids
= wpa_supplicant_build_filter_ssids(
1196 wpa_s
->conf
, ¶ms
.num_filter_ssids
);
1198 params
.extra_ies
= wpabuf_head(extra_ie
);
1199 params
.extra_ies_len
= wpabuf_len(extra_ie
);
1203 if (wpa_s
->p2p_in_provisioning
|| wpa_s
->p2p_in_invitation
||
1204 (wpa_s
->show_group_started
&& wpa_s
->go_params
)) {
1206 * The interface may not yet be in P2P mode, so we have to
1207 * explicitly request P2P probe to disable CCK rates.
1209 params
.p2p_probe
= 1;
1211 #endif /* CONFIG_P2P */
1213 if ((wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCAN
) &&
1214 wpa_s
->wpa_state
<= WPA_SCANNING
) {
1215 params
.mac_addr_rand
= 1;
1216 if (wpa_s
->mac_addr_scan
) {
1217 params
.mac_addr
= wpa_s
->mac_addr_scan
;
1218 params
.mac_addr_mask
= wpa_s
->mac_addr_scan
+ ETH_ALEN
;
1222 if (!is_zero_ether_addr(wpa_s
->next_scan_bssid
)) {
1223 struct wpa_bss
*bss
;
1225 params
.bssid
= wpa_s
->next_scan_bssid
;
1226 bss
= wpa_bss_get_bssid_latest(wpa_s
, params
.bssid
);
1227 if (bss
&& bss
->ssid_len
&& params
.num_ssids
== 1 &&
1228 params
.ssids
[0].ssid_len
== 0) {
1229 params
.ssids
[0].ssid
= bss
->ssid
;
1230 params
.ssids
[0].ssid_len
= bss
->ssid_len
;
1231 wpa_dbg(wpa_s
, MSG_DEBUG
,
1232 "Scan a previously specified BSSID " MACSTR
1234 MAC2STR(params
.bssid
),
1235 wpa_ssid_txt(bss
->ssid
, bss
->ssid_len
));
1237 wpa_dbg(wpa_s
, MSG_DEBUG
,
1238 "Scan a previously specified BSSID " MACSTR
,
1239 MAC2STR(params
.bssid
));
1243 scan_params
= ¶ms
;
1248 * If the driver does not support multi-channel concurrency and a
1249 * virtual interface that shares the same radio with the wpa_s interface
1250 * is operating there may not be need to scan other channels apart from
1251 * the current operating channel on the other virtual interface. Filter
1252 * out other channels in case we are trying to find a connection for a
1253 * station interface when we are not configured to prefer station
1254 * connection and a concurrent operation is already in process.
1256 if (wpa_s
->scan_for_connection
&&
1257 wpa_s
->last_scan_req
== NORMAL_SCAN_REQ
&&
1258 !scan_params
->freqs
&& !params
.freqs
&&
1259 wpas_is_p2p_prioritized(wpa_s
) &&
1260 wpa_s
->p2p_group_interface
== NOT_P2P_GROUP_INTERFACE
&&
1261 non_p2p_network_enabled(wpa_s
)) {
1262 unsigned int num
= wpa_s
->num_multichan_concurrent
;
1264 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
1266 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
1267 if (num
> 0 && num
== wpa_s
->num_multichan_concurrent
) {
1268 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the current operating channels since all channels are already used");
1270 os_free(params
.freqs
);
1271 params
.freqs
= NULL
;
1275 #endif /* CONFIG_P2P */
1277 ret
= wpa_supplicant_trigger_scan(wpa_s
, scan_params
);
1279 if (ret
&& wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
&&
1280 !wpa_s
->manual_scan_freqs
) {
1281 /* Restore manual_scan_freqs for the next attempt */
1282 wpa_s
->manual_scan_freqs
= params
.freqs
;
1283 params
.freqs
= NULL
;
1286 wpabuf_free(extra_ie
);
1287 os_free(params
.freqs
);
1288 os_free(params
.filter_ssids
);
1291 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate AP scan");
1292 if (wpa_s
->scan_prev_wpa_state
!= wpa_s
->wpa_state
)
1293 wpa_supplicant_set_state(wpa_s
,
1294 wpa_s
->scan_prev_wpa_state
);
1295 /* Restore scan_req since we will try to scan again */
1296 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
1297 wpa_supplicant_req_scan(wpa_s
, 1, 0);
1299 wpa_s
->scan_for_connection
= 0;
1300 #ifdef CONFIG_INTERWORKING
1301 wpa_s
->interworking_fast_assoc_tried
= 0;
1302 #endif /* CONFIG_INTERWORKING */
1304 os_memset(wpa_s
->next_scan_bssid
, 0, ETH_ALEN
);
1309 void wpa_supplicant_update_scan_int(struct wpa_supplicant
*wpa_s
, int sec
)
1311 struct os_reltime remaining
, new_int
;
1314 cancelled
= eloop_cancel_timeout_one(wpa_supplicant_scan
, wpa_s
, NULL
,
1319 if (cancelled
&& os_reltime_before(&remaining
, &new_int
)) {
1320 new_int
.sec
= remaining
.sec
;
1321 new_int
.usec
= remaining
.usec
;
1325 eloop_register_timeout(new_int
.sec
, new_int
.usec
,
1326 wpa_supplicant_scan
, wpa_s
, NULL
);
1328 wpa_s
->scan_interval
= sec
;
1333 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1334 * @wpa_s: Pointer to wpa_supplicant data
1335 * @sec: Number of seconds after which to scan
1336 * @usec: Number of microseconds after which to scan
1338 * This function is used to schedule a scan for neighboring access points after
1339 * the specified time.
1341 void wpa_supplicant_req_scan(struct wpa_supplicant
*wpa_s
, int sec
, int usec
)
1345 if (wpa_s
->p2p_mgmt
) {
1346 wpa_dbg(wpa_s
, MSG_DEBUG
,
1347 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1352 res
= eloop_deplete_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
,
1355 wpa_dbg(wpa_s
, MSG_DEBUG
, "Rescheduling scan request: %d.%06d sec",
1357 } else if (res
== 0) {
1358 wpa_dbg(wpa_s
, MSG_DEBUG
, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1361 wpa_dbg(wpa_s
, MSG_DEBUG
, "Setting scan request: %d.%06d sec",
1363 eloop_register_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
, NULL
);
1369 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1370 * @wpa_s: Pointer to wpa_supplicant data
1371 * @sec: Number of seconds after which to scan
1372 * @usec: Number of microseconds after which to scan
1373 * Returns: 0 on success or -1 otherwise
1375 * This function is used to schedule periodic scans for neighboring
1376 * access points after the specified time.
1378 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant
*wpa_s
,
1381 if (!wpa_s
->sched_scan_supported
)
1384 eloop_register_timeout(sec
, usec
,
1385 wpa_supplicant_delayed_sched_scan_timeout
,
1393 wpa_scan_set_relative_rssi_params(struct wpa_supplicant
*wpa_s
,
1394 struct wpa_driver_scan_params
*params
)
1396 if (wpa_s
->wpa_state
!= WPA_COMPLETED
||
1397 !(wpa_s
->drv_flags
& WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI
) ||
1398 wpa_s
->srp
.relative_rssi_set
== 0)
1401 params
->relative_rssi_set
= 1;
1402 params
->relative_rssi
= wpa_s
->srp
.relative_rssi
;
1404 if (wpa_s
->srp
.relative_adjust_rssi
== 0)
1407 params
->relative_adjust_band
= wpa_s
->srp
.relative_adjust_band
;
1408 params
->relative_adjust_rssi
= wpa_s
->srp
.relative_adjust_rssi
;
1413 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1414 * @wpa_s: Pointer to wpa_supplicant data
1415 * Returns: 0 is sched_scan was started or -1 otherwise
1417 * This function is used to schedule periodic scans for neighboring
1418 * access points repeating the scan continuously.
1420 int wpa_supplicant_req_sched_scan(struct wpa_supplicant
*wpa_s
)
1422 struct wpa_driver_scan_params params
;
1423 struct wpa_driver_scan_params
*scan_params
;
1424 enum wpa_states prev_state
;
1425 struct wpa_ssid
*ssid
= NULL
;
1426 struct wpabuf
*extra_ie
= NULL
;
1428 unsigned int max_sched_scan_ssids
;
1431 struct sched_scan_plan scan_plan
;
1433 if (!wpa_s
->sched_scan_supported
)
1436 if (wpa_s
->max_sched_scan_ssids
> WPAS_MAX_SCAN_SSIDS
)
1437 max_sched_scan_ssids
= WPAS_MAX_SCAN_SSIDS
;
1439 max_sched_scan_ssids
= wpa_s
->max_sched_scan_ssids
;
1440 if (max_sched_scan_ssids
< 1 || wpa_s
->conf
->disable_scan_offload
)
1443 wpa_s
->sched_scan_stop_req
= 0;
1445 if (wpa_s
->sched_scanning
) {
1446 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already sched scanning");
1451 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
1452 if (!wpas_network_disabled(wpa_s
, ssid
) && !ssid
->scan_ssid
) {
1453 /* Use wildcard SSID to find this network */
1455 } else if (!wpas_network_disabled(wpa_s
, ssid
) &&
1460 if (!wpas_network_disabled(wpa_s
, ssid
) &&
1461 ssid
->key_mgmt
== WPA_KEY_MGMT_WPS
) {
1463 * Normal scan is more reliable and faster for WPS
1464 * operations and since these are for short periods of
1465 * time, the benefit of trying to use sched_scan would
1468 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1469 "sched_scan for WPS");
1472 #endif /* CONFIG_WPS */
1477 if (wpa_s
->normal_scans
< 3 &&
1478 (need_ssids
<= wpa_s
->max_scan_ssids
||
1479 wpa_s
->max_scan_ssids
>= (int) max_sched_scan_ssids
)) {
1481 * When normal scan can speed up operations, use that for the
1482 * first operations before starting the sched_scan to allow
1483 * user space sleep more. We do this only if the normal scan
1484 * has functionality that is suitable for this or if the
1485 * sched_scan does not have better support for multiple SSIDs.
1487 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1488 "sched_scan for initial scans (normal_scans=%d)",
1489 wpa_s
->normal_scans
);
1493 os_memset(¶ms
, 0, sizeof(params
));
1495 /* If we can't allocate space for the filters, we just don't filter */
1496 params
.filter_ssids
= os_calloc(wpa_s
->max_match_sets
,
1497 sizeof(struct wpa_driver_scan_filter
));
1499 prev_state
= wpa_s
->wpa_state
;
1500 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
1501 wpa_s
->wpa_state
== WPA_INACTIVE
)
1502 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
1504 if (wpa_s
->autoscan_params
!= NULL
) {
1505 scan_params
= wpa_s
->autoscan_params
;
1509 /* Find the starting point from which to continue scanning */
1510 ssid
= wpa_s
->conf
->ssid
;
1511 if (wpa_s
->prev_sched_ssid
) {
1513 if (ssid
== wpa_s
->prev_sched_ssid
) {
1521 if (!ssid
|| !wpa_s
->prev_sched_ssid
) {
1522 wpa_dbg(wpa_s
, MSG_DEBUG
, "Beginning of SSID list");
1523 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1524 wpa_s
->first_sched_scan
= 1;
1525 ssid
= wpa_s
->conf
->ssid
;
1526 wpa_s
->prev_sched_ssid
= ssid
;
1530 wpa_dbg(wpa_s
, MSG_DEBUG
, "Add wildcard SSID to sched_scan");
1535 if (wpas_network_disabled(wpa_s
, ssid
))
1538 if (params
.num_filter_ssids
< wpa_s
->max_match_sets
&&
1539 params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
) {
1540 wpa_dbg(wpa_s
, MSG_DEBUG
, "add to filter ssid: %s",
1541 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1542 os_memcpy(params
.filter_ssids
[params
.num_filter_ssids
].ssid
,
1543 ssid
->ssid
, ssid
->ssid_len
);
1544 params
.filter_ssids
[params
.num_filter_ssids
].ssid_len
=
1546 params
.num_filter_ssids
++;
1547 } else if (params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
)
1549 wpa_dbg(wpa_s
, MSG_DEBUG
, "Not enough room for SSID "
1550 "filter for sched_scan - drop filter");
1551 os_free(params
.filter_ssids
);
1552 params
.filter_ssids
= NULL
;
1553 params
.num_filter_ssids
= 0;
1556 if (ssid
->scan_ssid
&& ssid
->ssid
&& ssid
->ssid_len
) {
1557 if (params
.num_ssids
== max_sched_scan_ssids
)
1558 break; /* only room for broadcast SSID */
1559 wpa_dbg(wpa_s
, MSG_DEBUG
,
1560 "add to active scan ssid: %s",
1561 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1562 params
.ssids
[params
.num_ssids
].ssid
=
1564 params
.ssids
[params
.num_ssids
].ssid_len
=
1567 if (params
.num_ssids
>= max_sched_scan_ssids
) {
1568 wpa_s
->prev_sched_ssid
= ssid
;
1572 (wpas_network_disabled(wpa_s
, ssid
) ||
1579 wpa_s
->prev_sched_ssid
= ssid
;
1583 if (params
.num_filter_ssids
== 0) {
1584 os_free(params
.filter_ssids
);
1585 params
.filter_ssids
= NULL
;
1588 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
1590 params
.extra_ies
= wpabuf_head(extra_ie
);
1591 params
.extra_ies_len
= wpabuf_len(extra_ie
);
1594 if (wpa_s
->conf
->filter_rssi
)
1595 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
1597 /* See if user specified frequencies. If so, scan only those. */
1598 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
1599 wpa_dbg(wpa_s
, MSG_DEBUG
,
1600 "Optimize scan based on conf->freq_list");
1601 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
1605 if (wpa_s
->enable_oce
& OCE_STA
)
1606 params
.oce_scan
= 1;
1607 #endif /* CONFIG_MBO */
1609 scan_params
= ¶ms
;
1612 wpa_s
->sched_scan_timed_out
= 0;
1615 * We cannot support multiple scan plans if the scan request includes
1616 * too many SSID's, so in this case use only the last scan plan and make
1617 * it run infinitely. It will be stopped by the timeout.
1619 if (wpa_s
->sched_scan_plans_num
== 1 ||
1620 (wpa_s
->sched_scan_plans_num
&& !ssid
&& wpa_s
->first_sched_scan
)) {
1621 params
.sched_scan_plans
= wpa_s
->sched_scan_plans
;
1622 params
.sched_scan_plans_num
= wpa_s
->sched_scan_plans_num
;
1623 } else if (wpa_s
->sched_scan_plans_num
> 1) {
1624 wpa_dbg(wpa_s
, MSG_DEBUG
,
1625 "Too many SSIDs. Default to using single scheduled_scan plan");
1626 params
.sched_scan_plans
=
1627 &wpa_s
->sched_scan_plans
[wpa_s
->sched_scan_plans_num
-
1629 params
.sched_scan_plans_num
= 1;
1631 if (wpa_s
->conf
->sched_scan_interval
)
1632 scan_plan
.interval
= wpa_s
->conf
->sched_scan_interval
;
1634 scan_plan
.interval
= 10;
1636 if (scan_plan
.interval
> wpa_s
->max_sched_scan_plan_interval
) {
1637 wpa_printf(MSG_WARNING
,
1638 "Scan interval too long(%u), use the maximum allowed(%u)",
1640 wpa_s
->max_sched_scan_plan_interval
);
1641 scan_plan
.interval
=
1642 wpa_s
->max_sched_scan_plan_interval
;
1645 scan_plan
.iterations
= 0;
1646 params
.sched_scan_plans
= &scan_plan
;
1647 params
.sched_scan_plans_num
= 1;
1650 params
.sched_scan_start_delay
= wpa_s
->conf
->sched_scan_start_delay
;
1652 if (ssid
|| !wpa_s
->first_sched_scan
) {
1653 wpa_dbg(wpa_s
, MSG_DEBUG
,
1654 "Starting sched scan after %u seconds: interval %u timeout %d",
1655 params
.sched_scan_start_delay
,
1656 params
.sched_scan_plans
[0].interval
,
1657 wpa_s
->sched_scan_timeout
);
1659 wpa_dbg(wpa_s
, MSG_DEBUG
,
1660 "Starting sched scan after %u seconds (no timeout)",
1661 params
.sched_scan_start_delay
);
1664 wpa_setband_scan_freqs(wpa_s
, scan_params
);
1666 if ((wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCHED_SCAN
) &&
1667 wpa_s
->wpa_state
<= WPA_SCANNING
) {
1668 params
.mac_addr_rand
= 1;
1669 if (wpa_s
->mac_addr_sched_scan
) {
1670 params
.mac_addr
= wpa_s
->mac_addr_sched_scan
;
1671 params
.mac_addr_mask
= wpa_s
->mac_addr_sched_scan
+
1676 wpa_scan_set_relative_rssi_params(wpa_s
, scan_params
);
1678 ret
= wpa_supplicant_start_sched_scan(wpa_s
, scan_params
);
1679 wpabuf_free(extra_ie
);
1680 os_free(params
.filter_ssids
);
1682 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate sched scan");
1683 if (prev_state
!= wpa_s
->wpa_state
)
1684 wpa_supplicant_set_state(wpa_s
, prev_state
);
1688 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1689 if (ssid
|| !wpa_s
->first_sched_scan
) {
1690 wpa_s
->sched_scan_timed_out
= 0;
1691 eloop_register_timeout(wpa_s
->sched_scan_timeout
, 0,
1692 wpa_supplicant_sched_scan_timeout
,
1694 wpa_s
->first_sched_scan
= 0;
1695 wpa_s
->sched_scan_timeout
/= 2;
1696 params
.sched_scan_plans
[0].interval
*= 2;
1697 if ((unsigned int) wpa_s
->sched_scan_timeout
<
1698 params
.sched_scan_plans
[0].interval
||
1699 params
.sched_scan_plans
[0].interval
>
1700 wpa_s
->max_sched_scan_plan_interval
) {
1701 params
.sched_scan_plans
[0].interval
= 10;
1702 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1706 /* If there is no more ssids, start next time from the beginning */
1708 wpa_s
->prev_sched_ssid
= NULL
;
1715 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1716 * @wpa_s: Pointer to wpa_supplicant data
1718 * This function is used to cancel a scan request scheduled with
1719 * wpa_supplicant_req_scan().
1721 void wpa_supplicant_cancel_scan(struct wpa_supplicant
*wpa_s
)
1723 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling scan request");
1724 eloop_cancel_timeout(wpa_supplicant_scan
, wpa_s
, NULL
);
1729 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1730 * @wpa_s: Pointer to wpa_supplicant data
1732 * This function is used to stop a delayed scheduled scan.
1734 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant
*wpa_s
)
1736 if (!wpa_s
->sched_scan_supported
)
1739 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling delayed sched scan");
1740 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout
,
1746 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1747 * @wpa_s: Pointer to wpa_supplicant data
1749 * This function is used to stop a periodic scheduled scan.
1751 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant
*wpa_s
)
1753 if (!wpa_s
->sched_scanning
)
1756 if (wpa_s
->sched_scanning
)
1757 wpa_s
->sched_scan_stop_req
= 1;
1759 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling sched scan");
1760 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout
, wpa_s
, NULL
);
1761 wpa_supplicant_stop_sched_scan(wpa_s
);
1766 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1767 * @wpa_s: Pointer to wpa_supplicant data
1768 * @scanning: Whether scanning is currently in progress
1770 * This function is to generate scanning notifycations. It is called whenever
1771 * there may have been a change in scanning (scan started, completed, stopped).
1772 * wpas_notify_scanning() is called whenever the scanning state changed from the
1773 * previously notified state.
1775 void wpa_supplicant_notify_scanning(struct wpa_supplicant
*wpa_s
,
1778 if (wpa_s
->scanning
!= scanning
) {
1779 wpa_s
->scanning
= scanning
;
1780 wpas_notify_scanning(wpa_s
);
1785 static int wpa_scan_get_max_rate(const struct wpa_scan_res
*res
)
1791 ie
= wpa_scan_get_ie(res
, WLAN_EID_SUPP_RATES
);
1792 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1793 if ((ie
[i
+ 2] & 0x7f) > rate
)
1794 rate
= ie
[i
+ 2] & 0x7f;
1797 ie
= wpa_scan_get_ie(res
, WLAN_EID_EXT_SUPP_RATES
);
1798 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1799 if ((ie
[i
+ 2] & 0x7f) > rate
)
1800 rate
= ie
[i
+ 2] & 0x7f;
1808 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1809 * @res: Scan result entry
1810 * @ie: Information element identitifier (WLAN_EID_*)
1811 * Returns: Pointer to the information element (id field) or %NULL if not found
1813 * This function returns the first matching information element in the scan
1816 const u8
* wpa_scan_get_ie(const struct wpa_scan_res
*res
, u8 ie
)
1818 size_t ie_len
= res
->ie_len
;
1820 /* Use the Beacon frame IEs if res->ie_len is not available */
1822 ie_len
= res
->beacon_ie_len
;
1824 return get_ie((const u8
*) (res
+ 1), ie_len
, ie
);
1829 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1830 * @res: Scan result entry
1831 * @vendor_type: Vendor type (four octets starting the IE payload)
1832 * Returns: Pointer to the information element (id field) or %NULL if not found
1834 * This function returns the first matching information element in the scan
1837 const u8
* wpa_scan_get_vendor_ie(const struct wpa_scan_res
*res
,
1840 const u8
*end
, *pos
;
1842 pos
= (const u8
*) (res
+ 1);
1843 end
= pos
+ res
->ie_len
;
1845 while (end
- pos
> 1) {
1846 if (2 + pos
[1] > end
- pos
)
1848 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1849 vendor_type
== WPA_GET_BE32(&pos
[2]))
1859 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1860 * @res: Scan result entry
1861 * @vendor_type: Vendor type (four octets starting the IE payload)
1862 * Returns: Pointer to the information element (id field) or %NULL if not found
1864 * This function returns the first matching information element in the scan
1867 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1868 * from Beacon frames instead of either Beacon or Probe Response frames.
1870 const u8
* wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res
*res
,
1873 const u8
*end
, *pos
;
1875 if (res
->beacon_ie_len
== 0)
1878 pos
= (const u8
*) (res
+ 1);
1880 end
= pos
+ res
->beacon_ie_len
;
1882 while (end
- pos
> 1) {
1883 if (2 + pos
[1] > end
- pos
)
1885 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1886 vendor_type
== WPA_GET_BE32(&pos
[2]))
1896 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1897 * @res: Scan result entry
1898 * @vendor_type: Vendor type (four octets starting the IE payload)
1899 * Returns: Pointer to the information element payload or %NULL if not found
1901 * This function returns concatenated payload of possibly fragmented vendor
1902 * specific information elements in the scan result. The caller is responsible
1903 * for freeing the returned buffer.
1905 struct wpabuf
* wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res
*res
,
1909 const u8
*end
, *pos
;
1911 buf
= wpabuf_alloc(res
->ie_len
);
1915 pos
= (const u8
*) (res
+ 1);
1916 end
= pos
+ res
->ie_len
;
1918 while (end
- pos
> 1) {
1919 if (2 + pos
[1] > end
- pos
)
1921 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1922 vendor_type
== WPA_GET_BE32(&pos
[2]))
1923 wpabuf_put_data(buf
, pos
+ 2 + 4, pos
[1] - 4);
1927 if (wpabuf_len(buf
) == 0) {
1937 * Channels with a great SNR can operate at full rate. What is a great SNR?
1938 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1939 * rule of thumb is that any SNR above 20 is good." This one
1940 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
1941 * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in
1942 * scan_est_throughput() allow even smaller SNR values for the maximum rates
1943 * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a
1944 * somewhat conservative value here.
1946 #define GREAT_SNR 25
1948 #define IS_5GHZ(n) (n > 4000)
1950 /* Compare function for sorting scan results. Return >0 if @b is considered
1952 static int wpa_scan_result_compar(const void *a
, const void *b
)
1954 #define MIN(a,b) a < b ? a : b
1955 struct wpa_scan_res
**_wa
= (void *) a
;
1956 struct wpa_scan_res
**_wb
= (void *) b
;
1957 struct wpa_scan_res
*wa
= *_wa
;
1958 struct wpa_scan_res
*wb
= *_wb
;
1960 int snr_a
, snr_b
, snr_a_full
, snr_b_full
;
1962 /* WPA/WPA2 support preferred */
1963 wpa_a
= wpa_scan_get_vendor_ie(wa
, WPA_IE_VENDOR_TYPE
) != NULL
||
1964 wpa_scan_get_ie(wa
, WLAN_EID_RSN
) != NULL
;
1965 wpa_b
= wpa_scan_get_vendor_ie(wb
, WPA_IE_VENDOR_TYPE
) != NULL
||
1966 wpa_scan_get_ie(wb
, WLAN_EID_RSN
) != NULL
;
1968 if (wpa_b
&& !wpa_a
)
1970 if (!wpa_b
&& wpa_a
)
1973 /* privacy support preferred */
1974 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) == 0 &&
1975 (wb
->caps
& IEEE80211_CAP_PRIVACY
))
1977 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) &&
1978 (wb
->caps
& IEEE80211_CAP_PRIVACY
) == 0)
1981 if (wa
->flags
& wb
->flags
& WPA_SCAN_LEVEL_DBM
) {
1982 snr_a_full
= wa
->snr
;
1983 snr_a
= MIN(wa
->snr
, GREAT_SNR
);
1984 snr_b_full
= wb
->snr
;
1985 snr_b
= MIN(wb
->snr
, GREAT_SNR
);
1987 /* Level is not in dBm, so we can't calculate
1988 * SNR. Just use raw level (units unknown). */
1989 snr_a
= snr_a_full
= wa
->level
;
1990 snr_b
= snr_b_full
= wb
->level
;
1993 /* if SNR is close, decide by max rate or frequency band */
1994 if (snr_a
&& snr_b
&& abs(snr_b
- snr_a
) < 7) {
1995 if (wa
->est_throughput
!= wb
->est_throughput
)
1996 return wb
->est_throughput
- wa
->est_throughput
;
1998 if ((snr_a
&& snr_b
&& abs(snr_b
- snr_a
) < 5) ||
1999 (wa
->qual
&& wb
->qual
&& abs(wb
->qual
- wa
->qual
) < 10)) {
2000 if (IS_5GHZ(wa
->freq
) ^ IS_5GHZ(wb
->freq
))
2001 return IS_5GHZ(wa
->freq
) ? -1 : 1;
2004 /* all things being equal, use SNR; if SNRs are
2005 * identical, use quality values since some drivers may only report
2006 * that value and leave the signal level zero */
2007 if (snr_b_full
== snr_a_full
)
2008 return wb
->qual
- wa
->qual
;
2009 return snr_b_full
- snr_a_full
;
2015 /* Compare function for sorting scan results when searching a WPS AP for
2016 * provisioning. Return >0 if @b is considered better. */
2017 static int wpa_scan_result_wps_compar(const void *a
, const void *b
)
2019 struct wpa_scan_res
**_wa
= (void *) a
;
2020 struct wpa_scan_res
**_wb
= (void *) b
;
2021 struct wpa_scan_res
*wa
= *_wa
;
2022 struct wpa_scan_res
*wb
= *_wb
;
2023 int uses_wps_a
, uses_wps_b
;
2024 struct wpabuf
*wps_a
, *wps_b
;
2027 /* Optimization - check WPS IE existence before allocated memory and
2028 * doing full reassembly. */
2029 uses_wps_a
= wpa_scan_get_vendor_ie(wa
, WPS_IE_VENDOR_TYPE
) != NULL
;
2030 uses_wps_b
= wpa_scan_get_vendor_ie(wb
, WPS_IE_VENDOR_TYPE
) != NULL
;
2031 if (uses_wps_a
&& !uses_wps_b
)
2033 if (!uses_wps_a
&& uses_wps_b
)
2036 if (uses_wps_a
&& uses_wps_b
) {
2037 wps_a
= wpa_scan_get_vendor_ie_multi(wa
, WPS_IE_VENDOR_TYPE
);
2038 wps_b
= wpa_scan_get_vendor_ie_multi(wb
, WPS_IE_VENDOR_TYPE
);
2039 res
= wps_ap_priority_compar(wps_a
, wps_b
);
2047 * Do not use current AP security policy as a sorting criteria during
2048 * WPS provisioning step since the AP may get reconfigured at the
2049 * completion of provisioning.
2052 /* all things being equal, use signal level; if signal levels are
2053 * identical, use quality values since some drivers may only report
2054 * that value and leave the signal level zero */
2055 if (wb
->level
== wa
->level
)
2056 return wb
->qual
- wa
->qual
;
2057 return wb
->level
- wa
->level
;
2059 #endif /* CONFIG_WPS */
2062 static void dump_scan_res(struct wpa_scan_results
*scan_res
)
2064 #ifndef CONFIG_NO_STDOUT_DEBUG
2067 if (scan_res
->res
== NULL
|| scan_res
->num
== 0)
2070 wpa_printf(MSG_EXCESSIVE
, "Sorted scan results");
2072 for (i
= 0; i
< scan_res
->num
; i
++) {
2073 struct wpa_scan_res
*r
= scan_res
->res
[i
];
2075 if (r
->flags
& WPA_SCAN_LEVEL_DBM
) {
2076 int noise_valid
= !(r
->flags
& WPA_SCAN_NOISE_INVALID
);
2078 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
2079 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
2080 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
2081 r
->noise
, noise_valid
? "" : "~", r
->level
,
2082 r
->snr
, r
->snr
>= GREAT_SNR
? "*" : "",
2084 r
->age
, r
->est_throughput
);
2086 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
2087 "noise=%d level=%d flags=0x%x age=%u est=%u",
2088 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
2089 r
->noise
, r
->level
, r
->flags
, r
->age
,
2092 pos
= (u8
*) (r
+ 1);
2094 wpa_hexdump(MSG_EXCESSIVE
, "IEs", pos
, r
->ie_len
);
2096 if (r
->beacon_ie_len
)
2097 wpa_hexdump(MSG_EXCESSIVE
, "Beacon IEs",
2098 pos
, r
->beacon_ie_len
);
2100 #endif /* CONFIG_NO_STDOUT_DEBUG */
2105 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
2106 * @wpa_s: Pointer to wpa_supplicant data
2107 * @bssid: BSSID to check
2108 * Returns: 0 if the BSSID is filtered or 1 if not
2110 * This function is used to filter out specific BSSIDs from scan reslts mainly
2111 * for testing purposes (SET bssid_filter ctrl_iface command).
2113 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant
*wpa_s
,
2118 if (wpa_s
->bssid_filter
== NULL
)
2121 for (i
= 0; i
< wpa_s
->bssid_filter_count
; i
++) {
2122 if (os_memcmp(wpa_s
->bssid_filter
+ i
* ETH_ALEN
, bssid
,
2131 void filter_scan_res(struct wpa_supplicant
*wpa_s
,
2132 struct wpa_scan_results
*res
)
2136 if (wpa_s
->bssid_filter
== NULL
)
2139 for (i
= 0, j
= 0; i
< res
->num
; i
++) {
2140 if (wpa_supplicant_filter_bssid_match(wpa_s
,
2141 res
->res
[i
]->bssid
)) {
2142 res
->res
[j
++] = res
->res
[i
];
2144 os_free(res
->res
[i
]);
2149 if (res
->num
!= j
) {
2150 wpa_printf(MSG_DEBUG
, "Filtered out %d scan results",
2151 (int) (res
->num
- j
));
2158 * Noise floor values to use when we have signal strength
2159 * measurements, but no noise floor measurements. These values were
2160 * measured in an office environment with many APs.
2162 #define DEFAULT_NOISE_FLOOR_2GHZ (-89)
2163 #define DEFAULT_NOISE_FLOOR_5GHZ (-92)
2165 void scan_snr(struct wpa_scan_res
*res
)
2167 if (res
->flags
& WPA_SCAN_NOISE_INVALID
) {
2168 res
->noise
= IS_5GHZ(res
->freq
) ?
2169 DEFAULT_NOISE_FLOOR_5GHZ
:
2170 DEFAULT_NOISE_FLOOR_2GHZ
;
2173 if (res
->flags
& WPA_SCAN_LEVEL_DBM
) {
2174 res
->snr
= res
->level
- res
->noise
;
2176 /* Level is not in dBm, so we can't calculate
2177 * SNR. Just use raw level (units unknown). */
2178 res
->snr
= res
->level
;
2183 static unsigned int max_ht20_rate(int snr
)
2186 return 6500; /* HT20 MCS0 */
2188 return 13000; /* HT20 MCS1 */
2190 return 19500; /* HT20 MCS2 */
2192 return 26000; /* HT20 MCS3 */
2194 return 39000; /* HT20 MCS4 */
2196 return 52000; /* HT20 MCS5 */
2198 return 58500; /* HT20 MCS6 */
2199 return 65000; /* HT20 MCS7 */
2203 static unsigned int max_ht40_rate(int snr
)
2206 return 13500; /* HT40 MCS0 */
2208 return 27000; /* HT40 MCS1 */
2210 return 40500; /* HT40 MCS2 */
2212 return 54000; /* HT40 MCS3 */
2214 return 81000; /* HT40 MCS4 */
2216 return 108000; /* HT40 MCS5 */
2218 return 121500; /* HT40 MCS6 */
2219 return 135000; /* HT40 MCS7 */
2223 static unsigned int max_vht80_rate(int snr
)
2228 return 29300; /* VHT80 MCS0 */
2230 return 58500; /* VHT80 MCS1 */
2232 return 87800; /* VHT80 MCS2 */
2234 return 117000; /* VHT80 MCS3 */
2236 return 175500; /* VHT80 MCS4 */
2238 return 234000; /* VHT80 MCS5 */
2240 return 263300; /* VHT80 MCS6 */
2242 return 292500; /* VHT80 MCS7 */
2244 return 351000; /* VHT80 MCS8 */
2245 return 390000; /* VHT80 MCS9 */
2249 void scan_est_throughput(struct wpa_supplicant
*wpa_s
,
2250 struct wpa_scan_res
*res
)
2252 enum local_hw_capab capab
= wpa_s
->hw_capab
;
2253 int rate
; /* max legacy rate in 500 kb/s units */
2255 unsigned int est
, tmp
;
2258 if (res
->est_throughput
)
2261 /* Get maximum legacy rate */
2262 rate
= wpa_scan_get_max_rate(res
);
2264 /* Limit based on estimated SNR */
2265 if (rate
> 1 * 2 && snr
< 1)
2267 else if (rate
> 2 * 2 && snr
< 4)
2269 else if (rate
> 6 * 2 && snr
< 5)
2271 else if (rate
> 9 * 2 && snr
< 6)
2273 else if (rate
> 12 * 2 && snr
< 7)
2275 else if (rate
> 18 * 2 && snr
< 10)
2277 else if (rate
> 24 * 2 && snr
< 11)
2279 else if (rate
> 36 * 2 && snr
< 15)
2281 else if (rate
> 48 * 2 && snr
< 19)
2283 else if (rate
> 54 * 2 && snr
< 21)
2287 if (capab
== CAPAB_HT
|| capab
== CAPAB_HT40
|| capab
== CAPAB_VHT
) {
2288 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_CAP
);
2290 tmp
= max_ht20_rate(snr
);
2296 if (capab
== CAPAB_HT40
|| capab
== CAPAB_VHT
) {
2297 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_OPERATION
);
2298 if (ie
&& ie
[1] >= 2 &&
2299 (ie
[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK
)) {
2300 tmp
= max_ht40_rate(snr
);
2306 if (capab
== CAPAB_VHT
) {
2307 /* Use +1 to assume VHT is always faster than HT */
2308 ie
= wpa_scan_get_ie(res
, WLAN_EID_VHT_CAP
);
2310 tmp
= max_ht20_rate(snr
) + 1;
2314 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_OPERATION
);
2315 if (ie
&& ie
[1] >= 2 &&
2317 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK
)) {
2318 tmp
= max_ht40_rate(snr
) + 1;
2323 ie
= wpa_scan_get_ie(res
, WLAN_EID_VHT_OPERATION
);
2324 if (ie
&& ie
[1] >= 1 &&
2325 (ie
[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK
)) {
2326 tmp
= max_vht80_rate(snr
) + 1;
2333 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
2335 res
->est_throughput
= est
;
2340 * wpa_supplicant_get_scan_results - Get scan results
2341 * @wpa_s: Pointer to wpa_supplicant data
2342 * @info: Information about what was scanned or %NULL if not available
2343 * @new_scan: Whether a new scan was performed
2344 * Returns: Scan results, %NULL on failure
2346 * This function request the current scan results from the driver and updates
2347 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2348 * results with wpa_scan_results_free().
2350 struct wpa_scan_results
*
2351 wpa_supplicant_get_scan_results(struct wpa_supplicant
*wpa_s
,
2352 struct scan_info
*info
, int new_scan
)
2354 struct wpa_scan_results
*scan_res
;
2356 int (*compar
)(const void *, const void *) = wpa_scan_result_compar
;
2358 scan_res
= wpa_drv_get_scan_results2(wpa_s
);
2359 if (scan_res
== NULL
) {
2360 wpa_dbg(wpa_s
, MSG_DEBUG
, "Failed to get scan results");
2363 if (scan_res
->fetch_time
.sec
== 0) {
2365 * Make sure we have a valid timestamp if the driver wrapper
2366 * does not set this.
2368 os_get_reltime(&scan_res
->fetch_time
);
2370 filter_scan_res(wpa_s
, scan_res
);
2372 for (i
= 0; i
< scan_res
->num
; i
++) {
2373 struct wpa_scan_res
*scan_res_item
= scan_res
->res
[i
];
2375 scan_snr(scan_res_item
);
2376 scan_est_throughput(wpa_s
, scan_res_item
);
2380 if (wpas_wps_searching(wpa_s
)) {
2381 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Order scan results with WPS "
2382 "provisioning rules");
2383 compar
= wpa_scan_result_wps_compar
;
2385 #endif /* CONFIG_WPS */
2387 if (scan_res
->res
) {
2388 qsort(scan_res
->res
, scan_res
->num
,
2389 sizeof(struct wpa_scan_res
*), compar
);
2391 dump_scan_res(scan_res
);
2393 if (wpa_s
->ignore_post_flush_scan_res
) {
2394 /* FLUSH command aborted an ongoing scan and these are the
2395 * results from the aborted scan. Do not process the results to
2396 * maintain flushed state. */
2397 wpa_dbg(wpa_s
, MSG_DEBUG
,
2398 "Do not update BSS table based on pending post-FLUSH scan results");
2399 wpa_s
->ignore_post_flush_scan_res
= 0;
2403 wpa_bss_update_start(wpa_s
);
2404 for (i
= 0; i
< scan_res
->num
; i
++)
2405 wpa_bss_update_scan_res(wpa_s
, scan_res
->res
[i
],
2406 &scan_res
->fetch_time
);
2407 wpa_bss_update_end(wpa_s
, info
, new_scan
);
2414 * wpa_supplicant_update_scan_results - Update scan results from the driver
2415 * @wpa_s: Pointer to wpa_supplicant data
2416 * Returns: 0 on success, -1 on failure
2418 * This function updates the BSS table within wpa_supplicant based on the
2419 * currently available scan results from the driver without requesting a new
2420 * scan. This is used in cases where the driver indicates an association
2421 * (including roaming within ESS) and wpa_supplicant does not yet have the
2422 * needed information to complete the connection (e.g., to perform validation
2423 * steps in 4-way handshake).
2425 int wpa_supplicant_update_scan_results(struct wpa_supplicant
*wpa_s
)
2427 struct wpa_scan_results
*scan_res
;
2428 scan_res
= wpa_supplicant_get_scan_results(wpa_s
, NULL
, 0);
2429 if (scan_res
== NULL
)
2431 wpa_scan_results_free(scan_res
);
2438 * scan_only_handler - Reports scan results
2440 void scan_only_handler(struct wpa_supplicant
*wpa_s
,
2441 struct wpa_scan_results
*scan_res
)
2443 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan-only results received");
2444 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
2445 wpa_s
->manual_scan_use_id
&& wpa_s
->own_scan_running
) {
2446 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
"id=%u",
2447 wpa_s
->manual_scan_id
);
2448 wpa_s
->manual_scan_use_id
= 0;
2450 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
);
2452 wpas_notify_scan_results(wpa_s
);
2453 wpas_notify_scan_done(wpa_s
, 1);
2454 if (wpa_s
->scan_work
) {
2455 struct wpa_radio_work
*work
= wpa_s
->scan_work
;
2456 wpa_s
->scan_work
= NULL
;
2457 radio_work_done(work
);
2460 if (wpa_s
->wpa_state
== WPA_SCANNING
)
2461 wpa_supplicant_set_state(wpa_s
, wpa_s
->scan_prev_wpa_state
);
2465 int wpas_scan_scheduled(struct wpa_supplicant
*wpa_s
)
2467 return eloop_is_timeout_registered(wpa_supplicant_scan
, wpa_s
, NULL
);
2471 struct wpa_driver_scan_params
*
2472 wpa_scan_clone_params(const struct wpa_driver_scan_params
*src
)
2474 struct wpa_driver_scan_params
*params
;
2478 params
= os_zalloc(sizeof(*params
));
2482 for (i
= 0; i
< src
->num_ssids
; i
++) {
2483 if (src
->ssids
[i
].ssid
) {
2484 n
= os_memdup(src
->ssids
[i
].ssid
,
2485 src
->ssids
[i
].ssid_len
);
2488 params
->ssids
[i
].ssid
= n
;
2489 params
->ssids
[i
].ssid_len
= src
->ssids
[i
].ssid_len
;
2492 params
->num_ssids
= src
->num_ssids
;
2494 if (src
->extra_ies
) {
2495 n
= os_memdup(src
->extra_ies
, src
->extra_ies_len
);
2498 params
->extra_ies
= n
;
2499 params
->extra_ies_len
= src
->extra_ies_len
;
2503 int len
= int_array_len(src
->freqs
);
2504 params
->freqs
= os_memdup(src
->freqs
, (len
+ 1) * sizeof(int));
2505 if (params
->freqs
== NULL
)
2509 if (src
->filter_ssids
) {
2510 params
->filter_ssids
= os_memdup(src
->filter_ssids
,
2511 sizeof(*params
->filter_ssids
) *
2512 src
->num_filter_ssids
);
2513 if (params
->filter_ssids
== NULL
)
2515 params
->num_filter_ssids
= src
->num_filter_ssids
;
2518 params
->filter_rssi
= src
->filter_rssi
;
2519 params
->p2p_probe
= src
->p2p_probe
;
2520 params
->only_new_results
= src
->only_new_results
;
2521 params
->low_priority
= src
->low_priority
;
2522 params
->duration
= src
->duration
;
2523 params
->duration_mandatory
= src
->duration_mandatory
;
2524 params
->oce_scan
= src
->oce_scan
;
2526 if (src
->sched_scan_plans_num
> 0) {
2527 params
->sched_scan_plans
=
2528 os_memdup(src
->sched_scan_plans
,
2529 sizeof(*src
->sched_scan_plans
) *
2530 src
->sched_scan_plans_num
);
2531 if (!params
->sched_scan_plans
)
2534 params
->sched_scan_plans_num
= src
->sched_scan_plans_num
;
2537 if (src
->mac_addr_rand
) {
2538 params
->mac_addr_rand
= src
->mac_addr_rand
;
2540 if (src
->mac_addr
&& src
->mac_addr_mask
) {
2543 mac_addr
= os_malloc(2 * ETH_ALEN
);
2547 os_memcpy(mac_addr
, src
->mac_addr
, ETH_ALEN
);
2548 os_memcpy(mac_addr
+ ETH_ALEN
, src
->mac_addr_mask
,
2550 params
->mac_addr
= mac_addr
;
2551 params
->mac_addr_mask
= mac_addr
+ ETH_ALEN
;
2558 bssid
= os_memdup(src
->bssid
, ETH_ALEN
);
2561 params
->bssid
= bssid
;
2564 params
->relative_rssi_set
= src
->relative_rssi_set
;
2565 params
->relative_rssi
= src
->relative_rssi
;
2566 params
->relative_adjust_band
= src
->relative_adjust_band
;
2567 params
->relative_adjust_rssi
= src
->relative_adjust_rssi
;
2571 wpa_scan_free_params(params
);
2576 void wpa_scan_free_params(struct wpa_driver_scan_params
*params
)
2583 for (i
= 0; i
< params
->num_ssids
; i
++)
2584 os_free((u8
*) params
->ssids
[i
].ssid
);
2585 os_free((u8
*) params
->extra_ies
);
2586 os_free(params
->freqs
);
2587 os_free(params
->filter_ssids
);
2588 os_free(params
->sched_scan_plans
);
2591 * Note: params->mac_addr_mask points to same memory allocation and
2592 * must not be freed separately.
2594 os_free((u8
*) params
->mac_addr
);
2596 os_free((u8
*) params
->bssid
);
2602 int wpas_start_pno(struct wpa_supplicant
*wpa_s
)
2605 size_t i
, num_ssid
, num_match_ssid
;
2606 struct wpa_ssid
*ssid
;
2607 struct wpa_driver_scan_params params
;
2608 struct sched_scan_plan scan_plan
;
2609 unsigned int max_sched_scan_ssids
;
2611 if (!wpa_s
->sched_scan_supported
)
2614 if (wpa_s
->max_sched_scan_ssids
> WPAS_MAX_SCAN_SSIDS
)
2615 max_sched_scan_ssids
= WPAS_MAX_SCAN_SSIDS
;
2617 max_sched_scan_ssids
= wpa_s
->max_sched_scan_ssids
;
2618 if (max_sched_scan_ssids
< 1)
2621 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
)
2624 if ((wpa_s
->wpa_state
> WPA_SCANNING
) &&
2625 (wpa_s
->wpa_state
< WPA_COMPLETED
)) {
2626 wpa_printf(MSG_ERROR
, "PNO: In assoc process");
2630 if (wpa_s
->wpa_state
== WPA_SCANNING
) {
2631 wpa_supplicant_cancel_scan(wpa_s
);
2632 if (wpa_s
->sched_scanning
) {
2633 wpa_printf(MSG_DEBUG
, "Schedule PNO on completion of "
2634 "ongoing sched scan");
2635 wpa_supplicant_cancel_sched_scan(wpa_s
);
2636 wpa_s
->pno_sched_pending
= 1;
2641 if (wpa_s
->sched_scan_stop_req
) {
2642 wpa_printf(MSG_DEBUG
,
2643 "Schedule PNO after previous sched scan has stopped");
2644 wpa_s
->pno_sched_pending
= 1;
2648 os_memset(¶ms
, 0, sizeof(params
));
2650 num_ssid
= num_match_ssid
= 0;
2651 ssid
= wpa_s
->conf
->ssid
;
2653 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2655 if (ssid
->scan_ssid
)
2661 if (num_match_ssid
== 0) {
2662 wpa_printf(MSG_DEBUG
, "PNO: No configured SSIDs");
2666 if (num_match_ssid
> num_ssid
) {
2667 params
.num_ssids
++; /* wildcard */
2671 if (num_ssid
> max_sched_scan_ssids
) {
2672 wpa_printf(MSG_DEBUG
, "PNO: Use only the first %u SSIDs from "
2673 "%u", max_sched_scan_ssids
, (unsigned int) num_ssid
);
2674 num_ssid
= max_sched_scan_ssids
;
2677 if (num_match_ssid
> wpa_s
->max_match_sets
) {
2678 num_match_ssid
= wpa_s
->max_match_sets
;
2679 wpa_dbg(wpa_s
, MSG_DEBUG
, "PNO: Too many SSIDs to match");
2681 params
.filter_ssids
= os_calloc(num_match_ssid
,
2682 sizeof(struct wpa_driver_scan_filter
));
2683 if (params
.filter_ssids
== NULL
)
2688 ssid
= wpa_s
->conf
->pssid
[prio
];
2690 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2691 if (ssid
->scan_ssid
&& params
.num_ssids
< num_ssid
) {
2692 params
.ssids
[params
.num_ssids
].ssid
=
2694 params
.ssids
[params
.num_ssids
].ssid_len
=
2698 os_memcpy(params
.filter_ssids
[i
].ssid
, ssid
->ssid
,
2700 params
.filter_ssids
[i
].ssid_len
= ssid
->ssid_len
;
2701 params
.num_filter_ssids
++;
2703 if (i
== num_match_ssid
)
2708 else if (prio
+ 1 == wpa_s
->conf
->num_prio
)
2711 ssid
= wpa_s
->conf
->pssid
[++prio
];
2714 if (wpa_s
->conf
->filter_rssi
)
2715 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
2717 if (wpa_s
->sched_scan_plans_num
) {
2718 params
.sched_scan_plans
= wpa_s
->sched_scan_plans
;
2719 params
.sched_scan_plans_num
= wpa_s
->sched_scan_plans_num
;
2721 /* Set one scan plan that will run infinitely */
2722 if (wpa_s
->conf
->sched_scan_interval
)
2723 scan_plan
.interval
= wpa_s
->conf
->sched_scan_interval
;
2725 scan_plan
.interval
= 10;
2727 scan_plan
.iterations
= 0;
2728 params
.sched_scan_plans
= &scan_plan
;
2729 params
.sched_scan_plans_num
= 1;
2732 params
.sched_scan_start_delay
= wpa_s
->conf
->sched_scan_start_delay
;
2734 if (params
.freqs
== NULL
&& wpa_s
->manual_sched_scan_freqs
) {
2735 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit sched scan to specified channels");
2736 params
.freqs
= wpa_s
->manual_sched_scan_freqs
;
2739 if ((wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_PNO
) &&
2740 wpa_s
->wpa_state
<= WPA_SCANNING
) {
2741 params
.mac_addr_rand
= 1;
2742 if (wpa_s
->mac_addr_pno
) {
2743 params
.mac_addr
= wpa_s
->mac_addr_pno
;
2744 params
.mac_addr_mask
= wpa_s
->mac_addr_pno
+ ETH_ALEN
;
2748 wpa_scan_set_relative_rssi_params(wpa_s
, ¶ms
);
2750 ret
= wpa_supplicant_start_sched_scan(wpa_s
, ¶ms
);
2751 os_free(params
.filter_ssids
);
2755 wpa_msg(wpa_s
, MSG_ERROR
, "Failed to schedule PNO");
2760 int wpas_stop_pno(struct wpa_supplicant
*wpa_s
)
2767 ret
= wpa_supplicant_stop_sched_scan(wpa_s
);
2768 wpa_s
->sched_scan_stop_req
= 1;
2771 wpa_s
->pno_sched_pending
= 0;
2773 if (wpa_s
->wpa_state
== WPA_SCANNING
)
2774 wpa_supplicant_req_scan(wpa_s
, 0, 0);
2780 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant
*wpa_s
,
2783 type
&= MAC_ADDR_RAND_ALL
;
2784 wpa_s
->mac_addr_rand_enable
&= ~type
;
2786 if (type
& MAC_ADDR_RAND_SCAN
) {
2787 os_free(wpa_s
->mac_addr_scan
);
2788 wpa_s
->mac_addr_scan
= NULL
;
2791 if (type
& MAC_ADDR_RAND_SCHED_SCAN
) {
2792 os_free(wpa_s
->mac_addr_sched_scan
);
2793 wpa_s
->mac_addr_sched_scan
= NULL
;
2796 if (type
& MAC_ADDR_RAND_PNO
) {
2797 os_free(wpa_s
->mac_addr_pno
);
2798 wpa_s
->mac_addr_pno
= NULL
;
2803 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant
*wpa_s
,
2804 unsigned int type
, const u8
*addr
,
2809 wpas_mac_addr_rand_scan_clear(wpa_s
, type
);
2812 tmp
= os_malloc(2 * ETH_ALEN
);
2815 os_memcpy(tmp
, addr
, ETH_ALEN
);
2816 os_memcpy(tmp
+ ETH_ALEN
, mask
, ETH_ALEN
);
2819 if (type
== MAC_ADDR_RAND_SCAN
) {
2820 wpa_s
->mac_addr_scan
= tmp
;
2821 } else if (type
== MAC_ADDR_RAND_SCHED_SCAN
) {
2822 wpa_s
->mac_addr_sched_scan
= tmp
;
2823 } else if (type
== MAC_ADDR_RAND_PNO
) {
2824 wpa_s
->mac_addr_pno
= tmp
;
2826 wpa_printf(MSG_INFO
,
2827 "scan: Invalid MAC randomization type=0x%x",
2833 wpa_s
->mac_addr_rand_enable
|= type
;
2838 int wpas_abort_ongoing_scan(struct wpa_supplicant
*wpa_s
)
2840 struct wpa_radio_work
*work
;
2841 struct wpa_radio
*radio
= wpa_s
->radio
;
2843 dl_list_for_each(work
, &radio
->work
, struct wpa_radio_work
, list
) {
2844 if (work
->wpa_s
!= wpa_s
|| !work
->started
||
2845 (os_strcmp(work
->type
, "scan") != 0 &&
2846 os_strcmp(work
->type
, "p2p-scan") != 0))
2848 wpa_dbg(wpa_s
, MSG_DEBUG
, "Abort an ongoing scan");
2849 return wpa_drv_abort_scan(wpa_s
, wpa_s
->curr_scan_cookie
);
2852 wpa_dbg(wpa_s
, MSG_DEBUG
, "No ongoing scan/p2p-scan found to abort");
2857 int wpas_sched_scan_plans_set(struct wpa_supplicant
*wpa_s
, const char *cmd
)
2859 struct sched_scan_plan
*scan_plans
= NULL
;
2860 const char *token
, *context
= NULL
;
2861 unsigned int num
= 0;
2867 wpa_printf(MSG_DEBUG
, "Clear sched scan plans");
2868 os_free(wpa_s
->sched_scan_plans
);
2869 wpa_s
->sched_scan_plans
= NULL
;
2870 wpa_s
->sched_scan_plans_num
= 0;
2874 while ((token
= cstr_token(cmd
, " ", &context
))) {
2876 struct sched_scan_plan
*scan_plan
, *n
;
2878 n
= os_realloc_array(scan_plans
, num
+ 1, sizeof(*scan_plans
));
2883 scan_plan
= &scan_plans
[num
];
2886 ret
= sscanf(token
, "%u:%u", &scan_plan
->interval
,
2887 &scan_plan
->iterations
);
2888 if (ret
<= 0 || ret
> 2 || !scan_plan
->interval
) {
2889 wpa_printf(MSG_ERROR
,
2890 "Invalid sched scan plan input: %s", token
);
2894 if (scan_plan
->interval
> wpa_s
->max_sched_scan_plan_interval
) {
2895 wpa_printf(MSG_WARNING
,
2896 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
2897 num
, scan_plan
->interval
,
2898 wpa_s
->max_sched_scan_plan_interval
);
2899 scan_plan
->interval
=
2900 wpa_s
->max_sched_scan_plan_interval
;
2904 scan_plan
->iterations
= 0;
2908 if (!scan_plan
->iterations
) {
2909 wpa_printf(MSG_ERROR
,
2910 "scan plan %u: Number of iterations cannot be zero",
2915 if (scan_plan
->iterations
>
2916 wpa_s
->max_sched_scan_plan_iterations
) {
2917 wpa_printf(MSG_WARNING
,
2918 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
2919 num
, scan_plan
->iterations
,
2920 wpa_s
->max_sched_scan_plan_iterations
);
2921 scan_plan
->iterations
=
2922 wpa_s
->max_sched_scan_plan_iterations
;
2925 wpa_printf(MSG_DEBUG
,
2926 "scan plan %u: interval=%u iterations=%u",
2927 num
, scan_plan
->interval
, scan_plan
->iterations
);
2931 wpa_printf(MSG_ERROR
, "Invalid scan plans entry");
2935 if (cstr_token(cmd
, " ", &context
) || scan_plans
[num
- 1].iterations
) {
2936 wpa_printf(MSG_ERROR
,
2937 "All scan plans but the last must specify a number of iterations");
2941 wpa_printf(MSG_DEBUG
, "scan plan %u (last plan): interval=%u",
2942 num
, scan_plans
[num
- 1].interval
);
2944 if (num
> wpa_s
->max_sched_scan_plans
) {
2945 wpa_printf(MSG_WARNING
,
2946 "Too many scheduled scan plans (only %u supported)",
2947 wpa_s
->max_sched_scan_plans
);
2948 wpa_printf(MSG_WARNING
,
2949 "Use only the first %u scan plans, and the last one (in infinite loop)",
2950 wpa_s
->max_sched_scan_plans
- 1);
2951 os_memcpy(&scan_plans
[wpa_s
->max_sched_scan_plans
- 1],
2952 &scan_plans
[num
- 1], sizeof(*scan_plans
));
2953 num
= wpa_s
->max_sched_scan_plans
;
2956 os_free(wpa_s
->sched_scan_plans
);
2957 wpa_s
->sched_scan_plans
= scan_plans
;
2958 wpa_s
->sched_scan_plans_num
= num
;
2963 os_free(scan_plans
);
2964 wpa_printf(MSG_ERROR
, "invalid scan plans list");
2970 * wpas_scan_reset_sched_scan - Reset sched_scan state
2971 * @wpa_s: Pointer to wpa_supplicant data
2973 * This function is used to cancel a running scheduled scan and to reset an
2974 * internal scan state to continue with a regular scan on the following
2975 * wpa_supplicant_req_scan() calls.
2977 void wpas_scan_reset_sched_scan(struct wpa_supplicant
*wpa_s
)
2979 wpa_s
->normal_scans
= 0;
2980 if (wpa_s
->sched_scanning
) {
2981 wpa_s
->sched_scan_timed_out
= 0;
2982 wpa_s
->prev_sched_ssid
= NULL
;
2983 wpa_supplicant_cancel_sched_scan(wpa_s
);
2988 void wpas_scan_restart_sched_scan(struct wpa_supplicant
*wpa_s
)
2990 /* simulate timeout to restart the sched scan */
2991 wpa_s
->sched_scan_timed_out
= 1;
2992 wpa_s
->prev_sched_ssid
= NULL
;
2993 wpa_supplicant_cancel_sched_scan(wpa_s
);