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 if (wpa_s
->current_ssid
!= NULL
)
40 wpas_notify_network_changed(wpa_s
);
42 wpa_supplicant_initiate_eapol(wpa_s
);
43 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already associated with a configured "
44 "network - generating associated event");
45 os_memset(&data
, 0, sizeof(data
));
46 wpa_supplicant_event(wpa_s
, EVENT_ASSOC
, &data
);
51 static int wpas_wps_in_use(struct wpa_supplicant
*wpa_s
,
52 enum wps_request_type
*req_type
)
54 struct wpa_ssid
*ssid
;
57 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
58 if (!(ssid
->key_mgmt
& WPA_KEY_MGMT_WPS
))
62 *req_type
= wpas_wps_get_req_type(ssid
);
63 if (!ssid
->eap
.phase1
)
66 if (os_strstr(ssid
->eap
.phase1
, "pbc=1"))
71 if (!wpa_s
->global
->p2p_disabled
&& wpa_s
->global
->p2p
&&
72 !wpa_s
->conf
->p2p_disabled
) {
73 wpa_s
->wps
->dev
.p2p
= 1;
76 *req_type
= WPS_REQ_ENROLLEE_INFO
;
79 #endif /* CONFIG_P2P */
83 #endif /* CONFIG_WPS */
87 * wpa_supplicant_enabled_networks - Check whether there are enabled networks
88 * @wpa_s: Pointer to wpa_supplicant data
89 * Returns: 0 if no networks are enabled, >0 if networks are enabled
91 * This function is used to figure out whether any networks (or Interworking
92 * with enabled credentials and auto_interworking) are present in the current
95 int wpa_supplicant_enabled_networks(struct wpa_supplicant
*wpa_s
)
97 struct wpa_ssid
*ssid
= wpa_s
->conf
->ssid
;
98 int count
= 0, disabled
= 0;
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 radio_work_done(work
);
169 wpa_supplicant_notify_scanning(wpa_s
, 1);
171 if (wpa_s
->clear_driver_scan_cache
) {
172 wpa_printf(MSG_DEBUG
,
173 "Request driver to clear scan cache due to local BSS flush");
174 params
->only_new_results
= 1;
176 ret
= wpa_drv_scan(wpa_s
, params
);
177 wpa_scan_free_params(params
);
180 int retry
= wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
;
182 if (wpa_s
->disconnected
)
185 wpa_supplicant_notify_scanning(wpa_s
, 0);
186 wpas_notify_scan_done(wpa_s
, 0);
187 if (wpa_s
->wpa_state
== WPA_SCANNING
)
188 wpa_supplicant_set_state(wpa_s
,
189 wpa_s
->scan_prev_wpa_state
);
190 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_FAILED
"ret=%d%s",
191 ret
, retry
? " retry=1" : "");
192 radio_work_done(work
);
195 /* Restore scan_req since we will try to scan again */
196 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
197 wpa_supplicant_req_scan(wpa_s
, 1, 0);
202 os_get_reltime(&wpa_s
->scan_trigger_time
);
204 wpa_s
->normal_scans
++;
205 wpa_s
->own_scan_requested
= 1;
206 wpa_s
->clear_driver_scan_cache
= 0;
207 wpa_s
->scan_work
= work
;
212 * wpa_supplicant_trigger_scan - Request driver to start a scan
213 * @wpa_s: Pointer to wpa_supplicant data
214 * @params: Scan parameters
215 * Returns: 0 on success, -1 on failure
217 int wpa_supplicant_trigger_scan(struct wpa_supplicant
*wpa_s
,
218 struct wpa_driver_scan_params
*params
)
220 struct wpa_driver_scan_params
*ctx
;
222 if (wpa_s
->scan_work
) {
223 wpa_dbg(wpa_s
, MSG_INFO
, "Reject scan trigger since one is already pending");
227 ctx
= wpa_scan_clone_params(params
);
231 if (radio_add_work(wpa_s
, 0, "scan", 0, wpas_trigger_scan_cb
, ctx
) < 0)
233 wpa_scan_free_params(ctx
);
242 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
244 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
246 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting delayed sched scan");
248 if (wpa_supplicant_req_sched_scan(wpa_s
))
249 wpa_supplicant_req_scan(wpa_s
, 0, 0);
254 wpa_supplicant_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
256 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
258 wpa_dbg(wpa_s
, MSG_DEBUG
, "Sched scan timeout - stopping it");
260 wpa_s
->sched_scan_timed_out
= 1;
261 wpa_supplicant_cancel_sched_scan(wpa_s
);
265 int wpa_supplicant_start_sched_scan(struct wpa_supplicant
*wpa_s
,
266 struct wpa_driver_scan_params
*params
,
271 wpa_supplicant_notify_scanning(wpa_s
, 1);
272 ret
= wpa_drv_sched_scan(wpa_s
, params
, interval
* 1000);
274 wpa_supplicant_notify_scanning(wpa_s
, 0);
276 wpa_s
->sched_scanning
= 1;
282 int wpa_supplicant_stop_sched_scan(struct wpa_supplicant
*wpa_s
)
286 ret
= wpa_drv_stop_sched_scan(wpa_s
);
288 wpa_dbg(wpa_s
, MSG_DEBUG
, "stopping sched_scan failed!");
289 /* TODO: what to do if stopping fails? */
297 static struct wpa_driver_scan_filter
*
298 wpa_supplicant_build_filter_ssids(struct wpa_config
*conf
, size_t *num_ssids
)
300 struct wpa_driver_scan_filter
*ssids
;
301 struct wpa_ssid
*ssid
;
305 if (!conf
->filter_ssids
)
308 for (count
= 0, ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
309 if (ssid
->ssid
&& ssid
->ssid_len
)
314 ssids
= os_calloc(count
, sizeof(struct wpa_driver_scan_filter
));
318 for (ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
319 if (!ssid
->ssid
|| !ssid
->ssid_len
)
321 os_memcpy(ssids
[*num_ssids
].ssid
, ssid
->ssid
, ssid
->ssid_len
);
322 ssids
[*num_ssids
].ssid_len
= ssid
->ssid_len
;
330 static void wpa_supplicant_optimize_freqs(
331 struct wpa_supplicant
*wpa_s
, struct wpa_driver_scan_params
*params
)
334 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_provisioning
&&
336 /* Optimize provisioning state scan based on GO information */
337 if (wpa_s
->p2p_in_provisioning
< 5 &&
338 wpa_s
->go_params
->freq
> 0) {
339 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO "
340 "preferred frequency %d MHz",
341 wpa_s
->go_params
->freq
);
342 params
->freqs
= os_calloc(2, sizeof(int));
344 params
->freqs
[0] = wpa_s
->go_params
->freq
;
345 } else if (wpa_s
->p2p_in_provisioning
< 8 &&
346 wpa_s
->go_params
->freq_list
[0]) {
347 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only common "
349 int_array_concat(¶ms
->freqs
,
350 wpa_s
->go_params
->freq_list
);
352 int_array_sort_unique(params
->freqs
);
354 wpa_s
->p2p_in_provisioning
++;
357 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_invitation
) {
359 * Optimize scan based on GO information during persistent
362 if (wpa_s
->p2p_in_invitation
< 5 &&
363 wpa_s
->p2p_invite_go_freq
> 0) {
364 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO preferred frequency %d MHz during invitation",
365 wpa_s
->p2p_invite_go_freq
);
366 params
->freqs
= os_calloc(2, sizeof(int));
368 params
->freqs
[0] = wpa_s
->p2p_invite_go_freq
;
370 wpa_s
->p2p_in_invitation
++;
371 if (wpa_s
->p2p_in_invitation
> 20) {
373 * This should not really happen since the variable is
374 * cleared on group removal, but if it does happen, make
375 * sure we do not get stuck in special invitation scan
378 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Clear p2p_in_invitation");
379 wpa_s
->p2p_in_invitation
= 0;
382 #endif /* CONFIG_P2P */
385 if (params
->freqs
== NULL
&& wpa_s
->after_wps
&& wpa_s
->wps_freq
) {
387 * Optimize post-provisioning scan based on channel used
388 * during provisioning.
390 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz "
391 "that was used during provisioning", wpa_s
->wps_freq
);
392 params
->freqs
= os_calloc(2, sizeof(int));
394 params
->freqs
[0] = wpa_s
->wps_freq
;
396 } else if (wpa_s
->after_wps
)
399 if (params
->freqs
== NULL
&& wpa_s
->known_wps_freq
&& wpa_s
->wps_freq
)
401 /* Optimize provisioning scan based on already known channel */
402 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz",
404 params
->freqs
= os_calloc(2, sizeof(int));
406 params
->freqs
[0] = wpa_s
->wps_freq
;
407 wpa_s
->known_wps_freq
= 0; /* only do this once */
409 #endif /* CONFIG_WPS */
413 #ifdef CONFIG_INTERWORKING
414 static void wpas_add_interworking_elements(struct wpa_supplicant
*wpa_s
,
417 if (wpa_s
->conf
->interworking
== 0)
420 wpabuf_put_u8(buf
, WLAN_EID_EXT_CAPAB
);
421 wpabuf_put_u8(buf
, 6);
422 wpabuf_put_u8(buf
, 0x00);
423 wpabuf_put_u8(buf
, 0x00);
424 wpabuf_put_u8(buf
, 0x00);
425 wpabuf_put_u8(buf
, 0x80); /* Bit 31 - Interworking */
426 wpabuf_put_u8(buf
, 0x00);
428 wpabuf_put_u8(buf
, 0x40); /* Bit 46 - WNM-Notification */
429 #else /* CONFIG_HS20 */
430 wpabuf_put_u8(buf
, 0x00);
431 #endif /* CONFIG_HS20 */
433 wpabuf_put_u8(buf
, WLAN_EID_INTERWORKING
);
434 wpabuf_put_u8(buf
, is_zero_ether_addr(wpa_s
->conf
->hessid
) ? 1 :
436 wpabuf_put_u8(buf
, wpa_s
->conf
->access_network_type
);
438 if (!is_zero_ether_addr(wpa_s
->conf
->hessid
))
439 wpabuf_put_data(buf
, wpa_s
->conf
->hessid
, ETH_ALEN
);
441 #endif /* CONFIG_INTERWORKING */
444 static struct wpabuf
* wpa_supplicant_extra_ies(struct wpa_supplicant
*wpa_s
)
446 struct wpabuf
*extra_ie
= NULL
;
449 enum wps_request_type req_type
= WPS_REQ_ENROLLEE_INFO
;
450 #endif /* CONFIG_WPS */
452 #ifdef CONFIG_INTERWORKING
453 if (wpa_s
->conf
->interworking
&&
454 wpabuf_resize(&extra_ie
, 100) == 0)
455 wpas_add_interworking_elements(wpa_s
, extra_ie
);
456 #endif /* CONFIG_INTERWORKING */
459 wps
= wpas_wps_in_use(wpa_s
, &req_type
);
462 struct wpabuf
*wps_ie
;
463 wps_ie
= wps_build_probe_req_ie(wps
== 2 ? DEV_PW_PUSHBUTTON
:
466 wpa_s
->wps
->uuid
, req_type
,
469 if (wpabuf_resize(&extra_ie
, wpabuf_len(wps_ie
)) == 0)
470 wpabuf_put_buf(extra_ie
, wps_ie
);
477 size_t ielen
= p2p_scan_ie_buf_len(wpa_s
->global
->p2p
);
478 if (wpabuf_resize(&extra_ie
, ielen
) == 0)
479 wpas_p2p_scan_ie(wpa_s
, extra_ie
);
481 #endif /* CONFIG_P2P */
483 wpa_supplicant_mesh_add_scan_ie(wpa_s
, &extra_ie
);
485 #endif /* CONFIG_WPS */
488 if (wpa_s
->conf
->hs20
&& wpabuf_resize(&extra_ie
, 7) == 0)
489 wpas_hs20_add_indication(extra_ie
, -1);
490 #endif /* CONFIG_HS20 */
499 * Check whether there are any enabled networks or credentials that could be
500 * used for a non-P2P connection.
502 static int non_p2p_network_enabled(struct wpa_supplicant
*wpa_s
)
504 struct wpa_ssid
*ssid
;
506 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
507 if (wpas_network_disabled(wpa_s
, ssid
))
509 if (!ssid
->p2p_group
)
513 if (wpa_s
->conf
->cred
&& wpa_s
->conf
->interworking
&&
514 wpa_s
->conf
->auto_interworking
)
520 #endif /* CONFIG_P2P */
523 static struct hostapd_hw_modes
* get_mode(struct hostapd_hw_modes
*modes
,
525 enum hostapd_hw_mode mode
)
529 for (i
= 0; i
< num_modes
; i
++) {
530 if (modes
[i
].mode
== mode
)
538 static void wpa_setband_scan_freqs_list(struct wpa_supplicant
*wpa_s
,
539 enum hostapd_hw_mode band
,
540 struct wpa_driver_scan_params
*params
)
542 /* Include only supported channels for the specified band */
543 struct hostapd_hw_modes
*mode
;
546 mode
= get_mode(wpa_s
->hw
.modes
, wpa_s
->hw
.num_modes
, band
);
548 /* No channels supported in this band - use empty list */
549 params
->freqs
= os_zalloc(sizeof(int));
553 params
->freqs
= os_calloc(mode
->num_channels
+ 1, sizeof(int));
554 if (params
->freqs
== NULL
)
556 for (count
= 0, i
= 0; i
< mode
->num_channels
; i
++) {
557 if (mode
->channels
[i
].flag
& HOSTAPD_CHAN_DISABLED
)
559 params
->freqs
[count
++] = mode
->channels
[i
].freq
;
564 static void wpa_setband_scan_freqs(struct wpa_supplicant
*wpa_s
,
565 struct wpa_driver_scan_params
*params
)
567 if (wpa_s
->hw
.modes
== NULL
)
568 return; /* unknown what channels the driver supports */
570 return; /* already using a limited channel set */
571 if (wpa_s
->setband
== WPA_SETBAND_5G
)
572 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211A
,
574 else if (wpa_s
->setband
== WPA_SETBAND_2G
)
575 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211G
,
580 static void wpa_set_scan_ssids(struct wpa_supplicant
*wpa_s
,
581 struct wpa_driver_scan_params
*params
,
585 struct wpa_ssid
*ssid
;
587 for (i
= 0; i
< wpa_s
->scan_id_count
; i
++) {
590 ssid
= wpa_config_get_network(wpa_s
->conf
, wpa_s
->scan_id
[i
]);
591 if (!ssid
|| !ssid
->scan_ssid
)
594 for (j
= 0; j
< params
->num_ssids
; j
++) {
595 if (params
->ssids
[j
].ssid_len
== ssid
->ssid_len
&&
596 params
->ssids
[j
].ssid
&&
597 os_memcmp(params
->ssids
[j
].ssid
, ssid
->ssid
,
598 ssid
->ssid_len
) == 0)
601 if (j
< params
->num_ssids
)
602 continue; /* already in the list */
604 if (params
->num_ssids
+ 1 > max_ssids
) {
605 wpa_printf(MSG_DEBUG
,
606 "Over max scan SSIDs for manual request");
610 wpa_printf(MSG_DEBUG
, "Scan SSID (manual request): %s",
611 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
612 params
->ssids
[params
->num_ssids
].ssid
= ssid
->ssid
;
613 params
->ssids
[params
->num_ssids
].ssid_len
= ssid
->ssid_len
;
617 wpa_s
->scan_id_count
= 0;
621 static void wpa_supplicant_scan(void *eloop_ctx
, void *timeout_ctx
)
623 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
624 struct wpa_ssid
*ssid
;
625 int ret
, p2p_in_prog
;
626 struct wpabuf
*extra_ie
= NULL
;
627 struct wpa_driver_scan_params params
;
628 struct wpa_driver_scan_params
*scan_params
;
631 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
) {
632 wpa_dbg(wpa_s
, MSG_DEBUG
, "Skip scan - PNO is in progress");
636 if (wpa_s
->wpa_state
== WPA_INTERFACE_DISABLED
) {
637 wpa_dbg(wpa_s
, MSG_DEBUG
, "Skip scan - interface disabled");
641 if (wpa_s
->disconnected
&& wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
642 wpa_dbg(wpa_s
, MSG_DEBUG
, "Disconnected - do not scan");
643 wpa_supplicant_set_state(wpa_s
, WPA_DISCONNECTED
);
647 if (wpa_s
->scanning
) {
649 * If we are already in scanning state, we shall reschedule the
650 * the incoming scan request.
652 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already scanning - Reschedule the incoming scan req");
653 wpa_supplicant_req_scan(wpa_s
, 1, 0);
657 if (!wpa_supplicant_enabled_networks(wpa_s
) &&
658 wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
659 wpa_dbg(wpa_s
, MSG_DEBUG
, "No enabled networks - do not scan");
660 wpa_supplicant_set_state(wpa_s
, WPA_INACTIVE
);
664 if (wpa_s
->conf
->ap_scan
!= 0 &&
665 (wpa_s
->drv_flags
& WPA_DRIVER_FLAGS_WIRED
)) {
666 wpa_dbg(wpa_s
, MSG_DEBUG
, "Using wired authentication - "
667 "overriding ap_scan configuration");
668 wpa_s
->conf
->ap_scan
= 0;
669 wpas_notify_ap_scan_changed(wpa_s
);
672 if (wpa_s
->conf
->ap_scan
== 0) {
673 wpa_supplicant_gen_assoc_event(wpa_s
);
677 p2p_in_prog
= wpas_p2p_in_progress(wpa_s
);
678 if (p2p_in_prog
&& p2p_in_prog
!= 2) {
679 wpa_dbg(wpa_s
, MSG_DEBUG
, "Delay station mode scan while P2P operation is in progress");
680 wpa_supplicant_req_scan(wpa_s
, 5, 0);
684 if (wpa_s
->conf
->ap_scan
== 2)
687 max_ssids
= wpa_s
->max_scan_ssids
;
688 if (max_ssids
> WPAS_MAX_SCAN_SSIDS
)
689 max_ssids
= WPAS_MAX_SCAN_SSIDS
;
692 wpa_s
->last_scan_req
= wpa_s
->scan_req
;
693 wpa_s
->scan_req
= NORMAL_SCAN_REQ
;
695 os_memset(¶ms
, 0, sizeof(params
));
697 wpa_s
->scan_prev_wpa_state
= wpa_s
->wpa_state
;
698 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
699 wpa_s
->wpa_state
== WPA_INACTIVE
)
700 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
703 * If autoscan has set its own scanning parameters
705 if (wpa_s
->autoscan_params
!= NULL
) {
706 scan_params
= wpa_s
->autoscan_params
;
710 if (wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
711 wpa_s
->connect_without_scan
) {
712 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
713 if (ssid
== wpa_s
->connect_without_scan
)
716 wpa_s
->connect_without_scan
= NULL
;
718 wpa_printf(MSG_DEBUG
, "Start a pre-selected network "
719 "without scan step");
720 wpa_supplicant_associate(wpa_s
, NULL
, ssid
);
726 if ((wpa_s
->p2p_in_provisioning
|| wpa_s
->show_group_started
) &&
727 wpa_s
->go_params
&& !wpa_s
->conf
->passive_scan
) {
728 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
729 wpa_s
->p2p_in_provisioning
,
730 wpa_s
->show_group_started
);
731 params
.ssids
[0].ssid
= wpa_s
->go_params
->ssid
;
732 params
.ssids
[0].ssid_len
= wpa_s
->go_params
->ssid_len
;
733 params
.num_ssids
= 1;
737 if (wpa_s
->p2p_in_invitation
) {
738 if (wpa_s
->current_ssid
) {
739 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during invitation");
740 params
.ssids
[0].ssid
= wpa_s
->current_ssid
->ssid
;
741 params
.ssids
[0].ssid_len
=
742 wpa_s
->current_ssid
->ssid_len
;
743 params
.num_ssids
= 1;
745 wpa_printf(MSG_DEBUG
, "P2P: No specific SSID known for scan during invitation");
749 #endif /* CONFIG_P2P */
751 /* Find the starting point from which to continue scanning */
752 ssid
= wpa_s
->conf
->ssid
;
753 if (wpa_s
->prev_scan_ssid
!= WILDCARD_SSID_SCAN
) {
755 if (ssid
== wpa_s
->prev_scan_ssid
) {
763 if (wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
764 wpa_s
->conf
->ap_scan
== 2) {
765 wpa_s
->connect_without_scan
= NULL
;
766 wpa_s
->prev_scan_wildcard
= 0;
767 wpa_supplicant_assoc_try(wpa_s
, ssid
);
769 } else if (wpa_s
->conf
->ap_scan
== 2) {
771 * User-initiated scan request in ap_scan == 2; scan with
775 } else if (wpa_s
->reattach
&& wpa_s
->current_ssid
!= NULL
) {
777 * Perform single-channel single-SSID scan for
778 * reassociate-to-same-BSS operation.
781 ssid
= wpa_s
->current_ssid
;
782 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
783 ssid
->ssid
, ssid
->ssid_len
);
784 params
.ssids
[0].ssid
= ssid
->ssid
;
785 params
.ssids
[0].ssid_len
= ssid
->ssid_len
;
786 params
.num_ssids
= 1;
789 * Allocate memory for frequency array, allocate one extra
790 * slot for the zero-terminator.
792 params
.freqs
= os_malloc(sizeof(int) * 2);
793 if (params
.freqs
== NULL
) {
794 wpa_dbg(wpa_s
, MSG_ERROR
, "Memory allocation failed");
797 params
.freqs
[0] = wpa_s
->assoc_freq
;
801 * Reset the reattach flag so that we fall back to full scan if
806 struct wpa_ssid
*start
= ssid
, *tssid
;
808 if (ssid
== NULL
&& max_ssids
> 1)
809 ssid
= wpa_s
->conf
->ssid
;
811 if (!wpas_network_disabled(wpa_s
, ssid
) &&
813 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
814 ssid
->ssid
, ssid
->ssid_len
);
815 params
.ssids
[params
.num_ssids
].ssid
=
817 params
.ssids
[params
.num_ssids
].ssid_len
=
820 if (params
.num_ssids
+ 1 >= max_ssids
)
826 if (ssid
== NULL
&& max_ssids
> 1 &&
827 start
!= wpa_s
->conf
->ssid
)
828 ssid
= wpa_s
->conf
->ssid
;
831 if (wpa_s
->scan_id_count
&&
832 wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
)
833 wpa_set_scan_ssids(wpa_s
, ¶ms
, max_ssids
);
835 for (tssid
= wpa_s
->conf
->ssid
;
836 wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&& tssid
;
837 tssid
= tssid
->next
) {
838 if (wpas_network_disabled(wpa_s
, tssid
))
840 if ((params
.freqs
|| !freqs_set
) && tssid
->scan_freq
) {
841 int_array_concat(¶ms
.freqs
,
844 os_free(params
.freqs
);
849 int_array_sort_unique(params
.freqs
);
852 if (ssid
&& max_ssids
== 1) {
854 * If the driver is limited to 1 SSID at a time interleave
855 * wildcard SSID scans with specific SSID scans to avoid
856 * waiting a long time for a wildcard scan.
858 if (!wpa_s
->prev_scan_wildcard
) {
859 params
.ssids
[0].ssid
= NULL
;
860 params
.ssids
[0].ssid_len
= 0;
861 wpa_s
->prev_scan_wildcard
= 1;
862 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for "
863 "wildcard SSID (Interleave with specific)");
865 wpa_s
->prev_scan_ssid
= ssid
;
866 wpa_s
->prev_scan_wildcard
= 0;
867 wpa_dbg(wpa_s
, MSG_DEBUG
,
868 "Starting AP scan for specific SSID: %s",
869 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
874 wpa_s
->prev_scan_ssid
= ssid
;
875 wpa_dbg(wpa_s
, MSG_DEBUG
, "Include wildcard SSID in "
878 } else if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
879 wpa_s
->manual_scan_passive
&& params
.num_ssids
== 0) {
880 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use passive scan based on manual request");
881 } else if (wpa_s
->conf
->passive_scan
) {
882 wpa_dbg(wpa_s
, MSG_DEBUG
,
883 "Use passive scan based on configuration");
885 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
887 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for wildcard "
892 #endif /* CONFIG_P2P */
894 wpa_supplicant_optimize_freqs(wpa_s
, ¶ms
);
895 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
897 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
898 wpa_s
->manual_scan_only_new
) {
899 wpa_printf(MSG_DEBUG
,
900 "Request driver to clear scan cache due to manual only_new=1 scan");
901 params
.only_new_results
= 1;
904 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
== NULL
&&
905 wpa_s
->manual_scan_freqs
) {
906 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit manual scan to specified channels");
907 params
.freqs
= wpa_s
->manual_scan_freqs
;
908 wpa_s
->manual_scan_freqs
= NULL
;
911 if (params
.freqs
== NULL
&& wpa_s
->next_scan_freqs
) {
912 wpa_dbg(wpa_s
, MSG_DEBUG
, "Optimize scan based on previously "
913 "generated frequency list");
914 params
.freqs
= wpa_s
->next_scan_freqs
;
916 os_free(wpa_s
->next_scan_freqs
);
917 wpa_s
->next_scan_freqs
= NULL
;
918 wpa_setband_scan_freqs(wpa_s
, ¶ms
);
920 /* See if user specified frequencies. If so, scan only those. */
921 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
922 wpa_dbg(wpa_s
, MSG_DEBUG
,
923 "Optimize scan based on conf->freq_list");
924 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
927 /* Use current associated channel? */
928 if (wpa_s
->conf
->scan_cur_freq
&& !params
.freqs
) {
929 unsigned int num
= wpa_s
->num_multichan_concurrent
;
931 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
933 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
935 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the "
936 "current operating channels since "
937 "scan_cur_freq is enabled");
939 os_free(params
.freqs
);
945 params
.filter_ssids
= wpa_supplicant_build_filter_ssids(
946 wpa_s
->conf
, ¶ms
.num_filter_ssids
);
948 params
.extra_ies
= wpabuf_head(extra_ie
);
949 params
.extra_ies_len
= wpabuf_len(extra_ie
);
953 if (wpa_s
->p2p_in_provisioning
|| wpa_s
->p2p_in_invitation
||
954 (wpa_s
->show_group_started
&& wpa_s
->go_params
)) {
956 * The interface may not yet be in P2P mode, so we have to
957 * explicitly request P2P probe to disable CCK rates.
959 params
.p2p_probe
= 1;
961 #endif /* CONFIG_P2P */
963 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCAN
) {
964 params
.mac_addr_rand
= 1;
965 if (wpa_s
->mac_addr_scan
) {
966 params
.mac_addr
= wpa_s
->mac_addr_scan
;
967 params
.mac_addr_mask
= wpa_s
->mac_addr_scan
+ ETH_ALEN
;
971 scan_params
= ¶ms
;
976 * If the driver does not support multi-channel concurrency and a
977 * virtual interface that shares the same radio with the wpa_s interface
978 * is operating there may not be need to scan other channels apart from
979 * the current operating channel on the other virtual interface. Filter
980 * out other channels in case we are trying to find a connection for a
981 * station interface when we are not configured to prefer station
982 * connection and a concurrent operation is already in process.
984 if (wpa_s
->scan_for_connection
&&
985 wpa_s
->last_scan_req
== NORMAL_SCAN_REQ
&&
986 !scan_params
->freqs
&& !params
.freqs
&&
987 wpas_is_p2p_prioritized(wpa_s
) &&
988 wpa_s
->p2p_group_interface
== NOT_P2P_GROUP_INTERFACE
&&
989 non_p2p_network_enabled(wpa_s
)) {
990 unsigned int num
= wpa_s
->num_multichan_concurrent
;
992 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
994 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
995 if (num
> 0 && num
== wpa_s
->num_multichan_concurrent
) {
996 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the current operating channels since all channels are already used");
998 os_free(params
.freqs
);
1003 #endif /* CONFIG_P2P */
1005 ret
= wpa_supplicant_trigger_scan(wpa_s
, scan_params
);
1007 if (ret
&& wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
&&
1008 !wpa_s
->manual_scan_freqs
) {
1009 /* Restore manual_scan_freqs for the next attempt */
1010 wpa_s
->manual_scan_freqs
= params
.freqs
;
1011 params
.freqs
= NULL
;
1014 wpabuf_free(extra_ie
);
1015 os_free(params
.freqs
);
1016 os_free(params
.filter_ssids
);
1019 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate AP scan");
1020 if (wpa_s
->scan_prev_wpa_state
!= wpa_s
->wpa_state
)
1021 wpa_supplicant_set_state(wpa_s
,
1022 wpa_s
->scan_prev_wpa_state
);
1023 /* Restore scan_req since we will try to scan again */
1024 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
1025 wpa_supplicant_req_scan(wpa_s
, 1, 0);
1027 wpa_s
->scan_for_connection
= 0;
1028 #ifdef CONFIG_INTERWORKING
1029 wpa_s
->interworking_fast_assoc_tried
= 0;
1030 #endif /* CONFIG_INTERWORKING */
1035 void wpa_supplicant_update_scan_int(struct wpa_supplicant
*wpa_s
, int sec
)
1037 struct os_reltime remaining
, new_int
;
1040 cancelled
= eloop_cancel_timeout_one(wpa_supplicant_scan
, wpa_s
, NULL
,
1045 if (cancelled
&& os_reltime_before(&remaining
, &new_int
)) {
1046 new_int
.sec
= remaining
.sec
;
1047 new_int
.usec
= remaining
.usec
;
1051 eloop_register_timeout(new_int
.sec
, new_int
.usec
,
1052 wpa_supplicant_scan
, wpa_s
, NULL
);
1054 wpa_s
->scan_interval
= sec
;
1059 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1060 * @wpa_s: Pointer to wpa_supplicant data
1061 * @sec: Number of seconds after which to scan
1062 * @usec: Number of microseconds after which to scan
1064 * This function is used to schedule a scan for neighboring access points after
1065 * the specified time.
1067 void wpa_supplicant_req_scan(struct wpa_supplicant
*wpa_s
, int sec
, int usec
)
1069 int res
= eloop_deplete_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
,
1072 wpa_dbg(wpa_s
, MSG_DEBUG
, "Rescheduling scan request: %d.%06d sec",
1074 } else if (res
== 0) {
1075 wpa_dbg(wpa_s
, MSG_DEBUG
, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1078 wpa_dbg(wpa_s
, MSG_DEBUG
, "Setting scan request: %d.%06d sec",
1080 eloop_register_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
, NULL
);
1086 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1087 * @wpa_s: Pointer to wpa_supplicant data
1088 * @sec: Number of seconds after which to scan
1089 * @usec: Number of microseconds after which to scan
1090 * Returns: 0 on success or -1 otherwise
1092 * This function is used to schedule periodic scans for neighboring
1093 * access points after the specified time.
1095 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant
*wpa_s
,
1098 if (!wpa_s
->sched_scan_supported
)
1101 eloop_register_timeout(sec
, usec
,
1102 wpa_supplicant_delayed_sched_scan_timeout
,
1110 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1111 * @wpa_s: Pointer to wpa_supplicant data
1112 * Returns: 0 is sched_scan was started or -1 otherwise
1114 * This function is used to schedule periodic scans for neighboring
1115 * access points repeating the scan continuously.
1117 int wpa_supplicant_req_sched_scan(struct wpa_supplicant
*wpa_s
)
1119 struct wpa_driver_scan_params params
;
1120 struct wpa_driver_scan_params
*scan_params
;
1121 enum wpa_states prev_state
;
1122 struct wpa_ssid
*ssid
= NULL
;
1123 struct wpabuf
*extra_ie
= NULL
;
1125 unsigned int max_sched_scan_ssids
;
1129 if (!wpa_s
->sched_scan_supported
)
1132 if (wpa_s
->max_sched_scan_ssids
> WPAS_MAX_SCAN_SSIDS
)
1133 max_sched_scan_ssids
= WPAS_MAX_SCAN_SSIDS
;
1135 max_sched_scan_ssids
= wpa_s
->max_sched_scan_ssids
;
1136 if (max_sched_scan_ssids
< 1 || wpa_s
->conf
->disable_scan_offload
)
1139 if (wpa_s
->sched_scanning
) {
1140 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already sched scanning");
1145 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
1146 if (!wpas_network_disabled(wpa_s
, ssid
) && !ssid
->scan_ssid
) {
1147 /* Use wildcard SSID to find this network */
1149 } else if (!wpas_network_disabled(wpa_s
, ssid
) &&
1154 if (!wpas_network_disabled(wpa_s
, ssid
) &&
1155 ssid
->key_mgmt
== WPA_KEY_MGMT_WPS
) {
1157 * Normal scan is more reliable and faster for WPS
1158 * operations and since these are for short periods of
1159 * time, the benefit of trying to use sched_scan would
1162 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1163 "sched_scan for WPS");
1166 #endif /* CONFIG_WPS */
1171 if (wpa_s
->normal_scans
< 3 &&
1172 (need_ssids
<= wpa_s
->max_scan_ssids
||
1173 wpa_s
->max_scan_ssids
>= (int) max_sched_scan_ssids
)) {
1175 * When normal scan can speed up operations, use that for the
1176 * first operations before starting the sched_scan to allow
1177 * user space sleep more. We do this only if the normal scan
1178 * has functionality that is suitable for this or if the
1179 * sched_scan does not have better support for multiple SSIDs.
1181 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1182 "sched_scan for initial scans (normal_scans=%d)",
1183 wpa_s
->normal_scans
);
1187 os_memset(¶ms
, 0, sizeof(params
));
1189 /* If we can't allocate space for the filters, we just don't filter */
1190 params
.filter_ssids
= os_calloc(wpa_s
->max_match_sets
,
1191 sizeof(struct wpa_driver_scan_filter
));
1193 prev_state
= wpa_s
->wpa_state
;
1194 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
1195 wpa_s
->wpa_state
== WPA_INACTIVE
)
1196 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
1198 if (wpa_s
->autoscan_params
!= NULL
) {
1199 scan_params
= wpa_s
->autoscan_params
;
1203 /* Find the starting point from which to continue scanning */
1204 ssid
= wpa_s
->conf
->ssid
;
1205 if (wpa_s
->prev_sched_ssid
) {
1207 if (ssid
== wpa_s
->prev_sched_ssid
) {
1215 if (!ssid
|| !wpa_s
->prev_sched_ssid
) {
1216 wpa_dbg(wpa_s
, MSG_DEBUG
, "Beginning of SSID list");
1217 if (wpa_s
->conf
->sched_scan_interval
)
1218 wpa_s
->sched_scan_interval
=
1219 wpa_s
->conf
->sched_scan_interval
;
1220 if (wpa_s
->sched_scan_interval
== 0)
1221 wpa_s
->sched_scan_interval
= 10;
1222 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1223 wpa_s
->first_sched_scan
= 1;
1224 ssid
= wpa_s
->conf
->ssid
;
1225 wpa_s
->prev_sched_ssid
= ssid
;
1229 wpa_dbg(wpa_s
, MSG_DEBUG
, "Add wildcard SSID to sched_scan");
1234 if (wpas_network_disabled(wpa_s
, ssid
))
1237 if (params
.num_filter_ssids
< wpa_s
->max_match_sets
&&
1238 params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
) {
1239 wpa_dbg(wpa_s
, MSG_DEBUG
, "add to filter ssid: %s",
1240 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1241 os_memcpy(params
.filter_ssids
[params
.num_filter_ssids
].ssid
,
1242 ssid
->ssid
, ssid
->ssid_len
);
1243 params
.filter_ssids
[params
.num_filter_ssids
].ssid_len
=
1245 params
.num_filter_ssids
++;
1246 } else if (params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
)
1248 wpa_dbg(wpa_s
, MSG_DEBUG
, "Not enough room for SSID "
1249 "filter for sched_scan - drop filter");
1250 os_free(params
.filter_ssids
);
1251 params
.filter_ssids
= NULL
;
1252 params
.num_filter_ssids
= 0;
1255 if (ssid
->scan_ssid
&& ssid
->ssid
&& ssid
->ssid_len
) {
1256 if (params
.num_ssids
== max_sched_scan_ssids
)
1257 break; /* only room for broadcast SSID */
1258 wpa_dbg(wpa_s
, MSG_DEBUG
,
1259 "add to active scan ssid: %s",
1260 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1261 params
.ssids
[params
.num_ssids
].ssid
=
1263 params
.ssids
[params
.num_ssids
].ssid_len
=
1266 if (params
.num_ssids
>= max_sched_scan_ssids
) {
1267 wpa_s
->prev_sched_ssid
= ssid
;
1271 (wpas_network_disabled(wpa_s
, ssid
) ||
1278 wpa_s
->prev_sched_ssid
= ssid
;
1282 if (params
.num_filter_ssids
== 0) {
1283 os_free(params
.filter_ssids
);
1284 params
.filter_ssids
= NULL
;
1287 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
1289 params
.extra_ies
= wpabuf_head(extra_ie
);
1290 params
.extra_ies_len
= wpabuf_len(extra_ie
);
1293 if (wpa_s
->conf
->filter_rssi
)
1294 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
1296 /* See if user specified frequencies. If so, scan only those. */
1297 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
1298 wpa_dbg(wpa_s
, MSG_DEBUG
,
1299 "Optimize scan based on conf->freq_list");
1300 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
1303 scan_params
= ¶ms
;
1306 if (ssid
|| !wpa_s
->first_sched_scan
) {
1307 wpa_dbg(wpa_s
, MSG_DEBUG
,
1308 "Starting sched scan: interval %d timeout %d",
1309 wpa_s
->sched_scan_interval
, wpa_s
->sched_scan_timeout
);
1311 wpa_dbg(wpa_s
, MSG_DEBUG
,
1312 "Starting sched scan: interval %d (no timeout)",
1313 wpa_s
->sched_scan_interval
);
1316 wpa_setband_scan_freqs(wpa_s
, scan_params
);
1318 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCHED_SCAN
) {
1319 params
.mac_addr_rand
= 1;
1320 if (wpa_s
->mac_addr_sched_scan
) {
1321 params
.mac_addr
= wpa_s
->mac_addr_sched_scan
;
1322 params
.mac_addr_mask
= wpa_s
->mac_addr_sched_scan
+
1327 ret
= wpa_supplicant_start_sched_scan(wpa_s
, scan_params
,
1328 wpa_s
->sched_scan_interval
);
1329 wpabuf_free(extra_ie
);
1330 os_free(params
.filter_ssids
);
1332 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate sched scan");
1333 if (prev_state
!= wpa_s
->wpa_state
)
1334 wpa_supplicant_set_state(wpa_s
, prev_state
);
1338 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1339 if (ssid
|| !wpa_s
->first_sched_scan
) {
1340 wpa_s
->sched_scan_timed_out
= 0;
1341 eloop_register_timeout(wpa_s
->sched_scan_timeout
, 0,
1342 wpa_supplicant_sched_scan_timeout
,
1344 wpa_s
->first_sched_scan
= 0;
1345 wpa_s
->sched_scan_timeout
/= 2;
1346 wpa_s
->sched_scan_interval
*= 2;
1347 if (wpa_s
->sched_scan_timeout
< wpa_s
->sched_scan_interval
) {
1348 wpa_s
->sched_scan_interval
= 10;
1349 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1353 /* If there is no more ssids, start next time from the beginning */
1355 wpa_s
->prev_sched_ssid
= NULL
;
1362 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1363 * @wpa_s: Pointer to wpa_supplicant data
1365 * This function is used to cancel a scan request scheduled with
1366 * wpa_supplicant_req_scan().
1368 void wpa_supplicant_cancel_scan(struct wpa_supplicant
*wpa_s
)
1370 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling scan request");
1371 eloop_cancel_timeout(wpa_supplicant_scan
, wpa_s
, NULL
);
1376 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1377 * @wpa_s: Pointer to wpa_supplicant data
1379 * This function is used to stop a delayed scheduled scan.
1381 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant
*wpa_s
)
1383 if (!wpa_s
->sched_scan_supported
)
1386 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling delayed sched scan");
1387 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout
,
1393 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1394 * @wpa_s: Pointer to wpa_supplicant data
1396 * This function is used to stop a periodic scheduled scan.
1398 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant
*wpa_s
)
1400 if (!wpa_s
->sched_scanning
)
1403 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling sched scan");
1404 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout
, wpa_s
, NULL
);
1405 wpa_supplicant_stop_sched_scan(wpa_s
);
1410 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1411 * @wpa_s: Pointer to wpa_supplicant data
1412 * @scanning: Whether scanning is currently in progress
1414 * This function is to generate scanning notifycations. It is called whenever
1415 * there may have been a change in scanning (scan started, completed, stopped).
1416 * wpas_notify_scanning() is called whenever the scanning state changed from the
1417 * previously notified state.
1419 void wpa_supplicant_notify_scanning(struct wpa_supplicant
*wpa_s
,
1422 if (wpa_s
->scanning
!= scanning
) {
1423 wpa_s
->scanning
= scanning
;
1424 wpas_notify_scanning(wpa_s
);
1429 static int wpa_scan_get_max_rate(const struct wpa_scan_res
*res
)
1435 ie
= wpa_scan_get_ie(res
, WLAN_EID_SUPP_RATES
);
1436 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1437 if ((ie
[i
+ 2] & 0x7f) > rate
)
1438 rate
= ie
[i
+ 2] & 0x7f;
1441 ie
= wpa_scan_get_ie(res
, WLAN_EID_EXT_SUPP_RATES
);
1442 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1443 if ((ie
[i
+ 2] & 0x7f) > rate
)
1444 rate
= ie
[i
+ 2] & 0x7f;
1452 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1453 * @res: Scan result entry
1454 * @ie: Information element identitifier (WLAN_EID_*)
1455 * Returns: Pointer to the information element (id field) or %NULL if not found
1457 * This function returns the first matching information element in the scan
1460 const u8
* wpa_scan_get_ie(const struct wpa_scan_res
*res
, u8 ie
)
1462 const u8
*end
, *pos
;
1464 pos
= (const u8
*) (res
+ 1);
1465 end
= pos
+ res
->ie_len
;
1467 while (pos
+ 1 < end
) {
1468 if (pos
+ 2 + pos
[1] > end
)
1480 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1481 * @res: Scan result entry
1482 * @vendor_type: Vendor type (four octets starting the IE payload)
1483 * Returns: Pointer to the information element (id field) or %NULL if not found
1485 * This function returns the first matching information element in the scan
1488 const u8
* wpa_scan_get_vendor_ie(const struct wpa_scan_res
*res
,
1491 const u8
*end
, *pos
;
1493 pos
= (const u8
*) (res
+ 1);
1494 end
= pos
+ res
->ie_len
;
1496 while (pos
+ 1 < end
) {
1497 if (pos
+ 2 + pos
[1] > end
)
1499 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1500 vendor_type
== WPA_GET_BE32(&pos
[2]))
1510 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1511 * @res: Scan result entry
1512 * @vendor_type: Vendor type (four octets starting the IE payload)
1513 * Returns: Pointer to the information element (id field) or %NULL if not found
1515 * This function returns the first matching information element in the scan
1518 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1519 * from Beacon frames instead of either Beacon or Probe Response frames.
1521 const u8
* wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res
*res
,
1524 const u8
*end
, *pos
;
1526 if (res
->beacon_ie_len
== 0)
1529 pos
= (const u8
*) (res
+ 1);
1531 end
= pos
+ res
->beacon_ie_len
;
1533 while (pos
+ 1 < end
) {
1534 if (pos
+ 2 + pos
[1] > end
)
1536 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1537 vendor_type
== WPA_GET_BE32(&pos
[2]))
1547 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1548 * @res: Scan result entry
1549 * @vendor_type: Vendor type (four octets starting the IE payload)
1550 * Returns: Pointer to the information element payload or %NULL if not found
1552 * This function returns concatenated payload of possibly fragmented vendor
1553 * specific information elements in the scan result. The caller is responsible
1554 * for freeing the returned buffer.
1556 struct wpabuf
* wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res
*res
,
1560 const u8
*end
, *pos
;
1562 buf
= wpabuf_alloc(res
->ie_len
);
1566 pos
= (const u8
*) (res
+ 1);
1567 end
= pos
+ res
->ie_len
;
1569 while (pos
+ 1 < end
) {
1570 if (pos
+ 2 + pos
[1] > end
)
1572 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1573 vendor_type
== WPA_GET_BE32(&pos
[2]))
1574 wpabuf_put_data(buf
, pos
+ 2 + 4, pos
[1] - 4);
1578 if (wpabuf_len(buf
) == 0) {
1588 * Channels with a great SNR can operate at full rate. What is a great SNR?
1589 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1590 * rule of thumb is that any SNR above 20 is good." This one
1591 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
1592 * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a
1593 * conservative value.
1595 #define GREAT_SNR 30
1597 #define IS_5GHZ(n) (n > 4000)
1599 /* Compare function for sorting scan results. Return >0 if @b is considered
1601 static int wpa_scan_result_compar(const void *a
, const void *b
)
1603 #define MIN(a,b) a < b ? a : b
1604 struct wpa_scan_res
**_wa
= (void *) a
;
1605 struct wpa_scan_res
**_wb
= (void *) b
;
1606 struct wpa_scan_res
*wa
= *_wa
;
1607 struct wpa_scan_res
*wb
= *_wb
;
1608 int wpa_a
, wpa_b
, maxrate_a
, maxrate_b
;
1611 /* WPA/WPA2 support preferred */
1612 wpa_a
= wpa_scan_get_vendor_ie(wa
, WPA_IE_VENDOR_TYPE
) != NULL
||
1613 wpa_scan_get_ie(wa
, WLAN_EID_RSN
) != NULL
;
1614 wpa_b
= wpa_scan_get_vendor_ie(wb
, WPA_IE_VENDOR_TYPE
) != NULL
||
1615 wpa_scan_get_ie(wb
, WLAN_EID_RSN
) != NULL
;
1617 if (wpa_b
&& !wpa_a
)
1619 if (!wpa_b
&& wpa_a
)
1622 /* privacy support preferred */
1623 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) == 0 &&
1624 (wb
->caps
& IEEE80211_CAP_PRIVACY
))
1626 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) &&
1627 (wb
->caps
& IEEE80211_CAP_PRIVACY
) == 0)
1630 if (wa
->flags
& wb
->flags
& WPA_SCAN_LEVEL_DBM
) {
1631 snr_a
= MIN(wa
->level
- wa
->noise
, GREAT_SNR
);
1632 snr_b
= MIN(wb
->level
- wb
->noise
, GREAT_SNR
);
1634 /* Level is not in dBm, so we can't calculate
1635 * SNR. Just use raw level (units unknown). */
1640 /* if SNR is close, decide by max rate or frequency band */
1641 if ((snr_a
&& snr_b
&& abs(snr_b
- snr_a
) < 5) ||
1642 (wa
->qual
&& wb
->qual
&& abs(wb
->qual
- wa
->qual
) < 10)) {
1643 maxrate_a
= wpa_scan_get_max_rate(wa
);
1644 maxrate_b
= wpa_scan_get_max_rate(wb
);
1645 if (maxrate_a
!= maxrate_b
)
1646 return maxrate_b
- maxrate_a
;
1647 if (IS_5GHZ(wa
->freq
) ^ IS_5GHZ(wb
->freq
))
1648 return IS_5GHZ(wa
->freq
) ? -1 : 1;
1651 /* all things being equal, use SNR; if SNRs are
1652 * identical, use quality values since some drivers may only report
1653 * that value and leave the signal level zero */
1655 return wb
->qual
- wa
->qual
;
1656 return snr_b
- snr_a
;
1662 /* Compare function for sorting scan results when searching a WPS AP for
1663 * provisioning. Return >0 if @b is considered better. */
1664 static int wpa_scan_result_wps_compar(const void *a
, const void *b
)
1666 struct wpa_scan_res
**_wa
= (void *) a
;
1667 struct wpa_scan_res
**_wb
= (void *) b
;
1668 struct wpa_scan_res
*wa
= *_wa
;
1669 struct wpa_scan_res
*wb
= *_wb
;
1670 int uses_wps_a
, uses_wps_b
;
1671 struct wpabuf
*wps_a
, *wps_b
;
1674 /* Optimization - check WPS IE existence before allocated memory and
1675 * doing full reassembly. */
1676 uses_wps_a
= wpa_scan_get_vendor_ie(wa
, WPS_IE_VENDOR_TYPE
) != NULL
;
1677 uses_wps_b
= wpa_scan_get_vendor_ie(wb
, WPS_IE_VENDOR_TYPE
) != NULL
;
1678 if (uses_wps_a
&& !uses_wps_b
)
1680 if (!uses_wps_a
&& uses_wps_b
)
1683 if (uses_wps_a
&& uses_wps_b
) {
1684 wps_a
= wpa_scan_get_vendor_ie_multi(wa
, WPS_IE_VENDOR_TYPE
);
1685 wps_b
= wpa_scan_get_vendor_ie_multi(wb
, WPS_IE_VENDOR_TYPE
);
1686 res
= wps_ap_priority_compar(wps_a
, wps_b
);
1694 * Do not use current AP security policy as a sorting criteria during
1695 * WPS provisioning step since the AP may get reconfigured at the
1696 * completion of provisioning.
1699 /* all things being equal, use signal level; if signal levels are
1700 * identical, use quality values since some drivers may only report
1701 * that value and leave the signal level zero */
1702 if (wb
->level
== wa
->level
)
1703 return wb
->qual
- wa
->qual
;
1704 return wb
->level
- wa
->level
;
1706 #endif /* CONFIG_WPS */
1709 static void dump_scan_res(struct wpa_scan_results
*scan_res
)
1711 #ifndef CONFIG_NO_STDOUT_DEBUG
1714 if (scan_res
->res
== NULL
|| scan_res
->num
== 0)
1717 wpa_printf(MSG_EXCESSIVE
, "Sorted scan results");
1719 for (i
= 0; i
< scan_res
->num
; i
++) {
1720 struct wpa_scan_res
*r
= scan_res
->res
[i
];
1722 if (r
->flags
& WPA_SCAN_LEVEL_DBM
) {
1723 int snr
= r
->level
- r
->noise
;
1724 int noise_valid
= !(r
->flags
& WPA_SCAN_NOISE_INVALID
);
1726 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
1727 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u",
1728 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
1729 r
->noise
, noise_valid
? "" : "~", r
->level
,
1730 snr
, snr
>= GREAT_SNR
? "*" : "", r
->flags
,
1733 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
1734 "noise=%d level=%d flags=0x%x age=%u",
1735 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
1736 r
->noise
, r
->level
, r
->flags
, r
->age
);
1738 pos
= (u8
*) (r
+ 1);
1740 wpa_hexdump(MSG_EXCESSIVE
, "IEs", pos
, r
->ie_len
);
1742 if (r
->beacon_ie_len
)
1743 wpa_hexdump(MSG_EXCESSIVE
, "Beacon IEs",
1744 pos
, r
->beacon_ie_len
);
1746 #endif /* CONFIG_NO_STDOUT_DEBUG */
1751 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
1752 * @wpa_s: Pointer to wpa_supplicant data
1753 * @bssid: BSSID to check
1754 * Returns: 0 if the BSSID is filtered or 1 if not
1756 * This function is used to filter out specific BSSIDs from scan reslts mainly
1757 * for testing purposes (SET bssid_filter ctrl_iface command).
1759 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant
*wpa_s
,
1764 if (wpa_s
->bssid_filter
== NULL
)
1767 for (i
= 0; i
< wpa_s
->bssid_filter_count
; i
++) {
1768 if (os_memcmp(wpa_s
->bssid_filter
+ i
* ETH_ALEN
, bssid
,
1777 static void filter_scan_res(struct wpa_supplicant
*wpa_s
,
1778 struct wpa_scan_results
*res
)
1782 if (wpa_s
->bssid_filter
== NULL
)
1785 for (i
= 0, j
= 0; i
< res
->num
; i
++) {
1786 if (wpa_supplicant_filter_bssid_match(wpa_s
,
1787 res
->res
[i
]->bssid
)) {
1788 res
->res
[j
++] = res
->res
[i
];
1790 os_free(res
->res
[i
]);
1795 if (res
->num
!= j
) {
1796 wpa_printf(MSG_DEBUG
, "Filtered out %d scan results",
1797 (int) (res
->num
- j
));
1804 * Noise floor values to use when we have signal strength
1805 * measurements, but no noise floor measurments. These values were
1806 * measured in an office environment with many APs.
1808 #define DEFAULT_NOISE_FLOOR_2GHZ (-89)
1809 #define DEFAULT_NOISE_FLOOR_5GHZ (-92)
1812 * wpa_supplicant_get_scan_results - Get scan results
1813 * @wpa_s: Pointer to wpa_supplicant data
1814 * @info: Information about what was scanned or %NULL if not available
1815 * @new_scan: Whether a new scan was performed
1816 * Returns: Scan results, %NULL on failure
1818 * This function request the current scan results from the driver and updates
1819 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
1820 * results with wpa_scan_results_free().
1822 struct wpa_scan_results
*
1823 wpa_supplicant_get_scan_results(struct wpa_supplicant
*wpa_s
,
1824 struct scan_info
*info
, int new_scan
)
1826 struct wpa_scan_results
*scan_res
;
1828 int (*compar
)(const void *, const void *) = wpa_scan_result_compar
;
1830 scan_res
= wpa_drv_get_scan_results2(wpa_s
);
1831 if (scan_res
== NULL
) {
1832 wpa_dbg(wpa_s
, MSG_DEBUG
, "Failed to get scan results");
1835 if (scan_res
->fetch_time
.sec
== 0) {
1837 * Make sure we have a valid timestamp if the driver wrapper
1838 * does not set this.
1840 os_get_reltime(&scan_res
->fetch_time
);
1842 filter_scan_res(wpa_s
, scan_res
);
1844 for (i
= 0; i
< scan_res
->num
; i
++) {
1845 struct wpa_scan_res
*scan_res_item
= scan_res
->res
[i
];
1847 if (scan_res_item
->flags
& WPA_SCAN_NOISE_INVALID
) {
1848 scan_res_item
->noise
=
1849 IS_5GHZ(scan_res_item
->freq
) ?
1850 DEFAULT_NOISE_FLOOR_5GHZ
:
1851 DEFAULT_NOISE_FLOOR_2GHZ
;
1856 if (wpas_wps_searching(wpa_s
)) {
1857 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Order scan results with WPS "
1858 "provisioning rules");
1859 compar
= wpa_scan_result_wps_compar
;
1861 #endif /* CONFIG_WPS */
1863 qsort(scan_res
->res
, scan_res
->num
, sizeof(struct wpa_scan_res
*),
1865 dump_scan_res(scan_res
);
1867 wpa_bss_update_start(wpa_s
);
1868 for (i
= 0; i
< scan_res
->num
; i
++)
1869 wpa_bss_update_scan_res(wpa_s
, scan_res
->res
[i
],
1870 &scan_res
->fetch_time
);
1871 wpa_bss_update_end(wpa_s
, info
, new_scan
);
1878 * wpa_supplicant_update_scan_results - Update scan results from the driver
1879 * @wpa_s: Pointer to wpa_supplicant data
1880 * Returns: 0 on success, -1 on failure
1882 * This function updates the BSS table within wpa_supplicant based on the
1883 * currently available scan results from the driver without requesting a new
1884 * scan. This is used in cases where the driver indicates an association
1885 * (including roaming within ESS) and wpa_supplicant does not yet have the
1886 * needed information to complete the connection (e.g., to perform validation
1887 * steps in 4-way handshake).
1889 int wpa_supplicant_update_scan_results(struct wpa_supplicant
*wpa_s
)
1891 struct wpa_scan_results
*scan_res
;
1892 scan_res
= wpa_supplicant_get_scan_results(wpa_s
, NULL
, 0);
1893 if (scan_res
== NULL
)
1895 wpa_scan_results_free(scan_res
);
1902 * scan_only_handler - Reports scan results
1904 void scan_only_handler(struct wpa_supplicant
*wpa_s
,
1905 struct wpa_scan_results
*scan_res
)
1907 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan-only results received");
1908 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
1909 wpa_s
->manual_scan_use_id
&& wpa_s
->own_scan_running
) {
1910 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
"id=%u",
1911 wpa_s
->manual_scan_id
);
1912 wpa_s
->manual_scan_use_id
= 0;
1914 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
);
1916 wpas_notify_scan_results(wpa_s
);
1917 wpas_notify_scan_done(wpa_s
, 1);
1918 if (wpa_s
->scan_work
) {
1919 struct wpa_radio_work
*work
= wpa_s
->scan_work
;
1920 wpa_s
->scan_work
= NULL
;
1921 radio_work_done(work
);
1926 int wpas_scan_scheduled(struct wpa_supplicant
*wpa_s
)
1928 return eloop_is_timeout_registered(wpa_supplicant_scan
, wpa_s
, NULL
);
1932 struct wpa_driver_scan_params
*
1933 wpa_scan_clone_params(const struct wpa_driver_scan_params
*src
)
1935 struct wpa_driver_scan_params
*params
;
1939 params
= os_zalloc(sizeof(*params
));
1943 for (i
= 0; i
< src
->num_ssids
; i
++) {
1944 if (src
->ssids
[i
].ssid
) {
1945 n
= os_malloc(src
->ssids
[i
].ssid_len
);
1948 os_memcpy(n
, src
->ssids
[i
].ssid
,
1949 src
->ssids
[i
].ssid_len
);
1950 params
->ssids
[i
].ssid
= n
;
1951 params
->ssids
[i
].ssid_len
= src
->ssids
[i
].ssid_len
;
1954 params
->num_ssids
= src
->num_ssids
;
1956 if (src
->extra_ies
) {
1957 n
= os_malloc(src
->extra_ies_len
);
1960 os_memcpy(n
, src
->extra_ies
, src
->extra_ies_len
);
1961 params
->extra_ies
= n
;
1962 params
->extra_ies_len
= src
->extra_ies_len
;
1966 int len
= int_array_len(src
->freqs
);
1967 params
->freqs
= os_malloc((len
+ 1) * sizeof(int));
1968 if (params
->freqs
== NULL
)
1970 os_memcpy(params
->freqs
, src
->freqs
, (len
+ 1) * sizeof(int));
1973 if (src
->filter_ssids
) {
1974 params
->filter_ssids
= os_malloc(sizeof(*params
->filter_ssids
) *
1975 src
->num_filter_ssids
);
1976 if (params
->filter_ssids
== NULL
)
1978 os_memcpy(params
->filter_ssids
, src
->filter_ssids
,
1979 sizeof(*params
->filter_ssids
) *
1980 src
->num_filter_ssids
);
1981 params
->num_filter_ssids
= src
->num_filter_ssids
;
1984 params
->filter_rssi
= src
->filter_rssi
;
1985 params
->p2p_probe
= src
->p2p_probe
;
1986 params
->only_new_results
= src
->only_new_results
;
1987 params
->low_priority
= src
->low_priority
;
1989 if (src
->mac_addr_rand
) {
1990 params
->mac_addr_rand
= src
->mac_addr_rand
;
1992 if (src
->mac_addr
&& src
->mac_addr_mask
) {
1995 mac_addr
= os_malloc(2 * ETH_ALEN
);
1999 os_memcpy(mac_addr
, src
->mac_addr
, ETH_ALEN
);
2000 os_memcpy(mac_addr
+ ETH_ALEN
, src
->mac_addr_mask
,
2002 params
->mac_addr
= mac_addr
;
2003 params
->mac_addr_mask
= mac_addr
+ ETH_ALEN
;
2009 wpa_scan_free_params(params
);
2014 void wpa_scan_free_params(struct wpa_driver_scan_params
*params
)
2021 for (i
= 0; i
< params
->num_ssids
; i
++)
2022 os_free((u8
*) params
->ssids
[i
].ssid
);
2023 os_free((u8
*) params
->extra_ies
);
2024 os_free(params
->freqs
);
2025 os_free(params
->filter_ssids
);
2028 * Note: params->mac_addr_mask points to same memory allocation and
2029 * must not be freed separately.
2031 os_free((u8
*) params
->mac_addr
);
2037 int wpas_start_pno(struct wpa_supplicant
*wpa_s
)
2039 int ret
, interval
, prio
;
2040 size_t i
, num_ssid
, num_match_ssid
;
2041 struct wpa_ssid
*ssid
;
2042 struct wpa_driver_scan_params params
;
2044 if (!wpa_s
->sched_scan_supported
)
2047 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
)
2050 if ((wpa_s
->wpa_state
> WPA_SCANNING
) &&
2051 (wpa_s
->wpa_state
<= WPA_COMPLETED
)) {
2052 wpa_printf(MSG_ERROR
, "PNO: In assoc process");
2056 if (wpa_s
->wpa_state
== WPA_SCANNING
) {
2057 wpa_supplicant_cancel_scan(wpa_s
);
2058 if (wpa_s
->sched_scanning
) {
2059 wpa_printf(MSG_DEBUG
, "Schedule PNO on completion of "
2060 "ongoing sched scan");
2061 wpa_supplicant_cancel_sched_scan(wpa_s
);
2062 wpa_s
->pno_sched_pending
= 1;
2067 os_memset(¶ms
, 0, sizeof(params
));
2069 num_ssid
= num_match_ssid
= 0;
2070 ssid
= wpa_s
->conf
->ssid
;
2072 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2074 if (ssid
->scan_ssid
)
2080 if (num_match_ssid
== 0) {
2081 wpa_printf(MSG_DEBUG
, "PNO: No configured SSIDs");
2085 if (num_match_ssid
> num_ssid
) {
2086 params
.num_ssids
++; /* wildcard */
2090 if (num_ssid
> WPAS_MAX_SCAN_SSIDS
) {
2091 wpa_printf(MSG_DEBUG
, "PNO: Use only the first %u SSIDs from "
2092 "%u", WPAS_MAX_SCAN_SSIDS
, (unsigned int) num_ssid
);
2093 num_ssid
= WPAS_MAX_SCAN_SSIDS
;
2096 if (num_match_ssid
> wpa_s
->max_match_sets
) {
2097 num_match_ssid
= wpa_s
->max_match_sets
;
2098 wpa_dbg(wpa_s
, MSG_DEBUG
, "PNO: Too many SSIDs to match");
2100 params
.filter_ssids
= os_calloc(num_match_ssid
,
2101 sizeof(struct wpa_driver_scan_filter
));
2102 if (params
.filter_ssids
== NULL
)
2107 ssid
= wpa_s
->conf
->pssid
[prio
];
2109 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2110 if (ssid
->scan_ssid
&& params
.num_ssids
< num_ssid
) {
2111 params
.ssids
[params
.num_ssids
].ssid
=
2113 params
.ssids
[params
.num_ssids
].ssid_len
=
2117 os_memcpy(params
.filter_ssids
[i
].ssid
, ssid
->ssid
,
2119 params
.filter_ssids
[i
].ssid_len
= ssid
->ssid_len
;
2120 params
.num_filter_ssids
++;
2122 if (i
== num_match_ssid
)
2127 else if (prio
+ 1 == wpa_s
->conf
->num_prio
)
2130 ssid
= wpa_s
->conf
->pssid
[++prio
];
2133 if (wpa_s
->conf
->filter_rssi
)
2134 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
2136 interval
= wpa_s
->conf
->sched_scan_interval
?
2137 wpa_s
->conf
->sched_scan_interval
: 10;
2139 if (params
.freqs
== NULL
&& wpa_s
->manual_sched_scan_freqs
) {
2140 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit sched scan to specified channels");
2141 params
.freqs
= wpa_s
->manual_sched_scan_freqs
;
2144 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_PNO
) {
2145 params
.mac_addr_rand
= 1;
2146 if (wpa_s
->mac_addr_pno
) {
2147 params
.mac_addr
= wpa_s
->mac_addr_pno
;
2148 params
.mac_addr_mask
= wpa_s
->mac_addr_pno
+ ETH_ALEN
;
2152 ret
= wpa_supplicant_start_sched_scan(wpa_s
, ¶ms
, interval
);
2153 os_free(params
.filter_ssids
);
2157 wpa_msg(wpa_s
, MSG_ERROR
, "Failed to schedule PNO");
2162 int wpas_stop_pno(struct wpa_supplicant
*wpa_s
)
2169 ret
= wpa_supplicant_stop_sched_scan(wpa_s
);
2172 wpa_s
->pno_sched_pending
= 0;
2174 if (wpa_s
->wpa_state
== WPA_SCANNING
)
2175 wpa_supplicant_req_scan(wpa_s
, 0, 0);
2181 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant
*wpa_s
,
2184 type
&= MAC_ADDR_RAND_ALL
;
2185 wpa_s
->mac_addr_rand_enable
&= ~type
;
2187 if (type
& MAC_ADDR_RAND_SCAN
) {
2188 os_free(wpa_s
->mac_addr_scan
);
2189 wpa_s
->mac_addr_scan
= NULL
;
2192 if (type
& MAC_ADDR_RAND_SCHED_SCAN
) {
2193 os_free(wpa_s
->mac_addr_sched_scan
);
2194 wpa_s
->mac_addr_sched_scan
= NULL
;
2197 if (type
& MAC_ADDR_RAND_PNO
) {
2198 os_free(wpa_s
->mac_addr_pno
);
2199 wpa_s
->mac_addr_pno
= NULL
;
2204 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant
*wpa_s
,
2205 unsigned int type
, const u8
*addr
,
2210 wpas_mac_addr_rand_scan_clear(wpa_s
, type
);
2213 tmp
= os_malloc(2 * ETH_ALEN
);
2216 os_memcpy(tmp
, addr
, ETH_ALEN
);
2217 os_memcpy(tmp
+ ETH_ALEN
, mask
, ETH_ALEN
);
2220 if (type
== MAC_ADDR_RAND_SCAN
) {
2221 wpa_s
->mac_addr_scan
= tmp
;
2222 } else if (type
== MAC_ADDR_RAND_SCHED_SCAN
) {
2223 wpa_s
->mac_addr_sched_scan
= tmp
;
2224 } else if (type
== MAC_ADDR_RAND_PNO
) {
2225 wpa_s
->mac_addr_pno
= tmp
;
2227 wpa_printf(MSG_INFO
,
2228 "scan: Invalid MAC randomization type=0x%x",
2234 wpa_s
->mac_addr_rand_enable
|= type
;