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;
101 return 0; /* no normal network profiles on p2p_mgmt interface */
104 if (!wpas_network_disabled(wpa_s
, ssid
))
110 if (wpa_s
->conf
->cred
&& wpa_s
->conf
->interworking
&&
111 wpa_s
->conf
->auto_interworking
)
113 if (count
== 0 && disabled
> 0) {
114 wpa_dbg(wpa_s
, MSG_DEBUG
, "No enabled networks (%d disabled "
115 "networks)", disabled
);
121 static void wpa_supplicant_assoc_try(struct wpa_supplicant
*wpa_s
,
122 struct wpa_ssid
*ssid
)
125 if (!wpas_network_disabled(wpa_s
, ssid
))
130 /* ap_scan=2 mode - try to associate with each SSID. */
132 wpa_dbg(wpa_s
, MSG_DEBUG
, "wpa_supplicant_assoc_try: Reached "
133 "end of scan list - go back to beginning");
134 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
135 wpa_supplicant_req_scan(wpa_s
, 0, 0);
139 /* Continue from the next SSID on the next attempt. */
140 wpa_s
->prev_scan_ssid
= ssid
;
142 /* Start from the beginning of the SSID list. */
143 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
145 wpa_supplicant_associate(wpa_s
, NULL
, ssid
);
149 static void wpas_trigger_scan_cb(struct wpa_radio_work
*work
, int deinit
)
151 struct wpa_supplicant
*wpa_s
= work
->wpa_s
;
152 struct wpa_driver_scan_params
*params
= work
->ctx
;
156 if (!work
->started
) {
157 wpa_scan_free_params(params
);
160 wpa_supplicant_notify_scanning(wpa_s
, 0);
161 wpas_notify_scan_done(wpa_s
, 0);
162 wpa_s
->scan_work
= NULL
;
166 if (wpas_update_random_addr_disassoc(wpa_s
) < 0) {
167 wpa_msg(wpa_s
, MSG_INFO
,
168 "Failed to assign random MAC address for a scan");
169 radio_work_done(work
);
173 wpa_supplicant_notify_scanning(wpa_s
, 1);
175 if (wpa_s
->clear_driver_scan_cache
) {
176 wpa_printf(MSG_DEBUG
,
177 "Request driver to clear scan cache due to local BSS flush");
178 params
->only_new_results
= 1;
180 ret
= wpa_drv_scan(wpa_s
, params
);
181 wpa_scan_free_params(params
);
184 int retry
= wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
;
186 if (wpa_s
->disconnected
)
189 wpa_supplicant_notify_scanning(wpa_s
, 0);
190 wpas_notify_scan_done(wpa_s
, 0);
191 if (wpa_s
->wpa_state
== WPA_SCANNING
)
192 wpa_supplicant_set_state(wpa_s
,
193 wpa_s
->scan_prev_wpa_state
);
194 wpa_msg(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_FAILED
"ret=%d%s",
195 ret
, retry
? " retry=1" : "");
196 radio_work_done(work
);
199 /* Restore scan_req since we will try to scan again */
200 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
201 wpa_supplicant_req_scan(wpa_s
, 1, 0);
206 os_get_reltime(&wpa_s
->scan_trigger_time
);
208 wpa_s
->normal_scans
++;
209 wpa_s
->own_scan_requested
= 1;
210 wpa_s
->clear_driver_scan_cache
= 0;
211 wpa_s
->scan_work
= work
;
216 * wpa_supplicant_trigger_scan - Request driver to start a scan
217 * @wpa_s: Pointer to wpa_supplicant data
218 * @params: Scan parameters
219 * Returns: 0 on success, -1 on failure
221 int wpa_supplicant_trigger_scan(struct wpa_supplicant
*wpa_s
,
222 struct wpa_driver_scan_params
*params
)
224 struct wpa_driver_scan_params
*ctx
;
226 if (wpa_s
->scan_work
) {
227 wpa_dbg(wpa_s
, MSG_INFO
, "Reject scan trigger since one is already pending");
231 ctx
= wpa_scan_clone_params(params
);
235 if (radio_add_work(wpa_s
, 0, "scan", 0, wpas_trigger_scan_cb
, ctx
) < 0)
237 wpa_scan_free_params(ctx
);
246 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
248 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
250 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting delayed sched scan");
252 if (wpa_supplicant_req_sched_scan(wpa_s
))
253 wpa_supplicant_req_scan(wpa_s
, 0, 0);
258 wpa_supplicant_sched_scan_timeout(void *eloop_ctx
, void *timeout_ctx
)
260 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
262 wpa_dbg(wpa_s
, MSG_DEBUG
, "Sched scan timeout - stopping it");
264 wpa_s
->sched_scan_timed_out
= 1;
265 wpa_supplicant_cancel_sched_scan(wpa_s
);
269 int wpa_supplicant_start_sched_scan(struct wpa_supplicant
*wpa_s
,
270 struct wpa_driver_scan_params
*params
,
275 wpa_supplicant_notify_scanning(wpa_s
, 1);
276 ret
= wpa_drv_sched_scan(wpa_s
, params
, interval
* 1000);
278 wpa_supplicant_notify_scanning(wpa_s
, 0);
280 wpa_s
->sched_scanning
= 1;
286 int wpa_supplicant_stop_sched_scan(struct wpa_supplicant
*wpa_s
)
290 ret
= wpa_drv_stop_sched_scan(wpa_s
);
292 wpa_dbg(wpa_s
, MSG_DEBUG
, "stopping sched_scan failed!");
293 /* TODO: what to do if stopping fails? */
301 static struct wpa_driver_scan_filter
*
302 wpa_supplicant_build_filter_ssids(struct wpa_config
*conf
, size_t *num_ssids
)
304 struct wpa_driver_scan_filter
*ssids
;
305 struct wpa_ssid
*ssid
;
309 if (!conf
->filter_ssids
)
312 for (count
= 0, ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
313 if (ssid
->ssid
&& ssid
->ssid_len
)
318 ssids
= os_calloc(count
, sizeof(struct wpa_driver_scan_filter
));
322 for (ssid
= conf
->ssid
; ssid
; ssid
= ssid
->next
) {
323 if (!ssid
->ssid
|| !ssid
->ssid_len
)
325 os_memcpy(ssids
[*num_ssids
].ssid
, ssid
->ssid
, ssid
->ssid_len
);
326 ssids
[*num_ssids
].ssid_len
= ssid
->ssid_len
;
334 static void wpa_supplicant_optimize_freqs(
335 struct wpa_supplicant
*wpa_s
, struct wpa_driver_scan_params
*params
)
338 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_provisioning
&&
340 /* Optimize provisioning state scan based on GO information */
341 if (wpa_s
->p2p_in_provisioning
< 5 &&
342 wpa_s
->go_params
->freq
> 0) {
343 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO "
344 "preferred frequency %d MHz",
345 wpa_s
->go_params
->freq
);
346 params
->freqs
= os_calloc(2, sizeof(int));
348 params
->freqs
[0] = wpa_s
->go_params
->freq
;
349 } else if (wpa_s
->p2p_in_provisioning
< 8 &&
350 wpa_s
->go_params
->freq_list
[0]) {
351 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only common "
353 int_array_concat(¶ms
->freqs
,
354 wpa_s
->go_params
->freq_list
);
356 int_array_sort_unique(params
->freqs
);
358 wpa_s
->p2p_in_provisioning
++;
361 if (params
->freqs
== NULL
&& wpa_s
->p2p_in_invitation
) {
363 * Optimize scan based on GO information during persistent
366 if (wpa_s
->p2p_in_invitation
< 5 &&
367 wpa_s
->p2p_invite_go_freq
> 0) {
368 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Scan only GO preferred frequency %d MHz during invitation",
369 wpa_s
->p2p_invite_go_freq
);
370 params
->freqs
= os_calloc(2, sizeof(int));
372 params
->freqs
[0] = wpa_s
->p2p_invite_go_freq
;
374 wpa_s
->p2p_in_invitation
++;
375 if (wpa_s
->p2p_in_invitation
> 20) {
377 * This should not really happen since the variable is
378 * cleared on group removal, but if it does happen, make
379 * sure we do not get stuck in special invitation scan
382 wpa_dbg(wpa_s
, MSG_DEBUG
, "P2P: Clear p2p_in_invitation");
383 wpa_s
->p2p_in_invitation
= 0;
386 #endif /* CONFIG_P2P */
389 if (params
->freqs
== NULL
&& wpa_s
->after_wps
&& wpa_s
->wps_freq
) {
391 * Optimize post-provisioning scan based on channel used
392 * during provisioning.
394 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz "
395 "that was used during provisioning", wpa_s
->wps_freq
);
396 params
->freqs
= os_calloc(2, sizeof(int));
398 params
->freqs
[0] = wpa_s
->wps_freq
;
400 } else if (wpa_s
->after_wps
)
403 if (params
->freqs
== NULL
&& wpa_s
->known_wps_freq
&& wpa_s
->wps_freq
)
405 /* Optimize provisioning scan based on already known channel */
406 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Scan only frequency %u MHz",
408 params
->freqs
= os_calloc(2, sizeof(int));
410 params
->freqs
[0] = wpa_s
->wps_freq
;
411 wpa_s
->known_wps_freq
= 0; /* only do this once */
413 #endif /* CONFIG_WPS */
417 #ifdef CONFIG_INTERWORKING
418 static void wpas_add_interworking_elements(struct wpa_supplicant
*wpa_s
,
421 if (wpa_s
->conf
->interworking
== 0)
424 wpabuf_put_u8(buf
, WLAN_EID_EXT_CAPAB
);
425 wpabuf_put_u8(buf
, 6);
426 wpabuf_put_u8(buf
, 0x00);
427 wpabuf_put_u8(buf
, 0x00);
428 wpabuf_put_u8(buf
, 0x00);
429 wpabuf_put_u8(buf
, 0x80); /* Bit 31 - Interworking */
430 wpabuf_put_u8(buf
, 0x00);
432 wpabuf_put_u8(buf
, 0x40); /* Bit 46 - WNM-Notification */
433 #else /* CONFIG_HS20 */
434 wpabuf_put_u8(buf
, 0x00);
435 #endif /* CONFIG_HS20 */
437 wpabuf_put_u8(buf
, WLAN_EID_INTERWORKING
);
438 wpabuf_put_u8(buf
, is_zero_ether_addr(wpa_s
->conf
->hessid
) ? 1 :
440 wpabuf_put_u8(buf
, wpa_s
->conf
->access_network_type
);
442 if (!is_zero_ether_addr(wpa_s
->conf
->hessid
))
443 wpabuf_put_data(buf
, wpa_s
->conf
->hessid
, ETH_ALEN
);
445 #endif /* CONFIG_INTERWORKING */
448 static struct wpabuf
* wpa_supplicant_extra_ies(struct wpa_supplicant
*wpa_s
)
450 struct wpabuf
*extra_ie
= NULL
;
453 enum wps_request_type req_type
= WPS_REQ_ENROLLEE_INFO
;
454 #endif /* CONFIG_WPS */
456 #ifdef CONFIG_INTERWORKING
457 if (wpa_s
->conf
->interworking
&&
458 wpabuf_resize(&extra_ie
, 100) == 0)
459 wpas_add_interworking_elements(wpa_s
, extra_ie
);
460 #endif /* CONFIG_INTERWORKING */
463 wps
= wpas_wps_in_use(wpa_s
, &req_type
);
466 struct wpabuf
*wps_ie
;
467 wps_ie
= wps_build_probe_req_ie(wps
== 2 ? DEV_PW_PUSHBUTTON
:
470 wpa_s
->wps
->uuid
, req_type
,
473 if (wpabuf_resize(&extra_ie
, wpabuf_len(wps_ie
)) == 0)
474 wpabuf_put_buf(extra_ie
, wps_ie
);
481 size_t ielen
= p2p_scan_ie_buf_len(wpa_s
->global
->p2p
);
482 if (wpabuf_resize(&extra_ie
, ielen
) == 0)
483 wpas_p2p_scan_ie(wpa_s
, extra_ie
);
485 #endif /* CONFIG_P2P */
487 wpa_supplicant_mesh_add_scan_ie(wpa_s
, &extra_ie
);
489 #endif /* CONFIG_WPS */
492 if (wpa_s
->conf
->hs20
&& wpabuf_resize(&extra_ie
, 7) == 0)
493 wpas_hs20_add_indication(extra_ie
, -1);
494 #endif /* CONFIG_HS20 */
503 * Check whether there are any enabled networks or credentials that could be
504 * used for a non-P2P connection.
506 static int non_p2p_network_enabled(struct wpa_supplicant
*wpa_s
)
508 struct wpa_ssid
*ssid
;
510 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
511 if (wpas_network_disabled(wpa_s
, ssid
))
513 if (!ssid
->p2p_group
)
517 if (wpa_s
->conf
->cred
&& wpa_s
->conf
->interworking
&&
518 wpa_s
->conf
->auto_interworking
)
524 #endif /* CONFIG_P2P */
527 static struct hostapd_hw_modes
* get_mode(struct hostapd_hw_modes
*modes
,
529 enum hostapd_hw_mode mode
)
533 for (i
= 0; i
< num_modes
; i
++) {
534 if (modes
[i
].mode
== mode
)
542 static void wpa_setband_scan_freqs_list(struct wpa_supplicant
*wpa_s
,
543 enum hostapd_hw_mode band
,
544 struct wpa_driver_scan_params
*params
)
546 /* Include only supported channels for the specified band */
547 struct hostapd_hw_modes
*mode
;
550 mode
= get_mode(wpa_s
->hw
.modes
, wpa_s
->hw
.num_modes
, band
);
552 /* No channels supported in this band - use empty list */
553 params
->freqs
= os_zalloc(sizeof(int));
557 params
->freqs
= os_calloc(mode
->num_channels
+ 1, sizeof(int));
558 if (params
->freqs
== NULL
)
560 for (count
= 0, i
= 0; i
< mode
->num_channels
; i
++) {
561 if (mode
->channels
[i
].flag
& HOSTAPD_CHAN_DISABLED
)
563 params
->freqs
[count
++] = mode
->channels
[i
].freq
;
568 static void wpa_setband_scan_freqs(struct wpa_supplicant
*wpa_s
,
569 struct wpa_driver_scan_params
*params
)
571 if (wpa_s
->hw
.modes
== NULL
)
572 return; /* unknown what channels the driver supports */
574 return; /* already using a limited channel set */
575 if (wpa_s
->setband
== WPA_SETBAND_5G
)
576 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211A
,
578 else if (wpa_s
->setband
== WPA_SETBAND_2G
)
579 wpa_setband_scan_freqs_list(wpa_s
, HOSTAPD_MODE_IEEE80211G
,
584 static void wpa_set_scan_ssids(struct wpa_supplicant
*wpa_s
,
585 struct wpa_driver_scan_params
*params
,
589 struct wpa_ssid
*ssid
;
591 for (i
= 0; i
< wpa_s
->scan_id_count
; i
++) {
594 ssid
= wpa_config_get_network(wpa_s
->conf
, wpa_s
->scan_id
[i
]);
595 if (!ssid
|| !ssid
->scan_ssid
)
598 for (j
= 0; j
< params
->num_ssids
; j
++) {
599 if (params
->ssids
[j
].ssid_len
== ssid
->ssid_len
&&
600 params
->ssids
[j
].ssid
&&
601 os_memcmp(params
->ssids
[j
].ssid
, ssid
->ssid
,
602 ssid
->ssid_len
) == 0)
605 if (j
< params
->num_ssids
)
606 continue; /* already in the list */
608 if (params
->num_ssids
+ 1 > max_ssids
) {
609 wpa_printf(MSG_DEBUG
,
610 "Over max scan SSIDs for manual request");
614 wpa_printf(MSG_DEBUG
, "Scan SSID (manual request): %s",
615 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
616 params
->ssids
[params
->num_ssids
].ssid
= ssid
->ssid
;
617 params
->ssids
[params
->num_ssids
].ssid_len
= ssid
->ssid_len
;
621 wpa_s
->scan_id_count
= 0;
625 static void wpa_supplicant_scan(void *eloop_ctx
, void *timeout_ctx
)
627 struct wpa_supplicant
*wpa_s
= eloop_ctx
;
628 struct wpa_ssid
*ssid
;
629 int ret
, p2p_in_prog
;
630 struct wpabuf
*extra_ie
= NULL
;
631 struct wpa_driver_scan_params params
;
632 struct wpa_driver_scan_params
*scan_params
;
635 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
) {
636 wpa_dbg(wpa_s
, MSG_DEBUG
, "Skip scan - PNO is in progress");
640 if (wpa_s
->wpa_state
== WPA_INTERFACE_DISABLED
) {
641 wpa_dbg(wpa_s
, MSG_DEBUG
, "Skip scan - interface disabled");
645 if (wpa_s
->disconnected
&& wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
646 wpa_dbg(wpa_s
, MSG_DEBUG
, "Disconnected - do not scan");
647 wpa_supplicant_set_state(wpa_s
, WPA_DISCONNECTED
);
651 if (wpa_s
->scanning
) {
653 * If we are already in scanning state, we shall reschedule the
654 * the incoming scan request.
656 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already scanning - Reschedule the incoming scan req");
657 wpa_supplicant_req_scan(wpa_s
, 1, 0);
661 if (!wpa_supplicant_enabled_networks(wpa_s
) &&
662 wpa_s
->scan_req
== NORMAL_SCAN_REQ
) {
663 wpa_dbg(wpa_s
, MSG_DEBUG
, "No enabled networks - do not scan");
664 wpa_supplicant_set_state(wpa_s
, WPA_INACTIVE
);
668 if (wpa_s
->conf
->ap_scan
!= 0 &&
669 (wpa_s
->drv_flags
& WPA_DRIVER_FLAGS_WIRED
)) {
670 wpa_dbg(wpa_s
, MSG_DEBUG
, "Using wired authentication - "
671 "overriding ap_scan configuration");
672 wpa_s
->conf
->ap_scan
= 0;
673 wpas_notify_ap_scan_changed(wpa_s
);
676 if (wpa_s
->conf
->ap_scan
== 0) {
677 wpa_supplicant_gen_assoc_event(wpa_s
);
681 p2p_in_prog
= wpas_p2p_in_progress(wpa_s
);
682 if (p2p_in_prog
&& p2p_in_prog
!= 2) {
683 wpa_dbg(wpa_s
, MSG_DEBUG
, "Delay station mode scan while P2P operation is in progress");
684 wpa_supplicant_req_scan(wpa_s
, 5, 0);
688 if (wpa_s
->conf
->ap_scan
== 2)
691 max_ssids
= wpa_s
->max_scan_ssids
;
692 if (max_ssids
> WPAS_MAX_SCAN_SSIDS
)
693 max_ssids
= WPAS_MAX_SCAN_SSIDS
;
696 wpa_s
->last_scan_req
= wpa_s
->scan_req
;
697 wpa_s
->scan_req
= NORMAL_SCAN_REQ
;
699 os_memset(¶ms
, 0, sizeof(params
));
701 wpa_s
->scan_prev_wpa_state
= wpa_s
->wpa_state
;
702 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
703 wpa_s
->wpa_state
== WPA_INACTIVE
)
704 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
707 * If autoscan has set its own scanning parameters
709 if (wpa_s
->autoscan_params
!= NULL
) {
710 scan_params
= wpa_s
->autoscan_params
;
714 if (wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
715 wpa_s
->connect_without_scan
) {
716 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
717 if (ssid
== wpa_s
->connect_without_scan
)
720 wpa_s
->connect_without_scan
= NULL
;
722 wpa_printf(MSG_DEBUG
, "Start a pre-selected network "
723 "without scan step");
724 wpa_supplicant_associate(wpa_s
, NULL
, ssid
);
730 if ((wpa_s
->p2p_in_provisioning
|| wpa_s
->show_group_started
) &&
731 wpa_s
->go_params
&& !wpa_s
->conf
->passive_scan
) {
732 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
733 wpa_s
->p2p_in_provisioning
,
734 wpa_s
->show_group_started
);
735 params
.ssids
[0].ssid
= wpa_s
->go_params
->ssid
;
736 params
.ssids
[0].ssid_len
= wpa_s
->go_params
->ssid_len
;
737 params
.num_ssids
= 1;
741 if (wpa_s
->p2p_in_invitation
) {
742 if (wpa_s
->current_ssid
) {
743 wpa_printf(MSG_DEBUG
, "P2P: Use specific SSID for scan during invitation");
744 params
.ssids
[0].ssid
= wpa_s
->current_ssid
->ssid
;
745 params
.ssids
[0].ssid_len
=
746 wpa_s
->current_ssid
->ssid_len
;
747 params
.num_ssids
= 1;
749 wpa_printf(MSG_DEBUG
, "P2P: No specific SSID known for scan during invitation");
753 #endif /* CONFIG_P2P */
755 /* Find the starting point from which to continue scanning */
756 ssid
= wpa_s
->conf
->ssid
;
757 if (wpa_s
->prev_scan_ssid
!= WILDCARD_SSID_SCAN
) {
759 if (ssid
== wpa_s
->prev_scan_ssid
) {
767 if (wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&&
768 wpa_s
->conf
->ap_scan
== 2) {
769 wpa_s
->connect_without_scan
= NULL
;
770 wpa_s
->prev_scan_wildcard
= 0;
771 wpa_supplicant_assoc_try(wpa_s
, ssid
);
773 } else if (wpa_s
->conf
->ap_scan
== 2) {
775 * User-initiated scan request in ap_scan == 2; scan with
779 } else if (wpa_s
->reattach
&& wpa_s
->current_ssid
!= NULL
) {
781 * Perform single-channel single-SSID scan for
782 * reassociate-to-same-BSS operation.
785 ssid
= wpa_s
->current_ssid
;
786 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
787 ssid
->ssid
, ssid
->ssid_len
);
788 params
.ssids
[0].ssid
= ssid
->ssid
;
789 params
.ssids
[0].ssid_len
= ssid
->ssid_len
;
790 params
.num_ssids
= 1;
793 * Allocate memory for frequency array, allocate one extra
794 * slot for the zero-terminator.
796 params
.freqs
= os_malloc(sizeof(int) * 2);
797 if (params
.freqs
== NULL
) {
798 wpa_dbg(wpa_s
, MSG_ERROR
, "Memory allocation failed");
801 params
.freqs
[0] = wpa_s
->assoc_freq
;
805 * Reset the reattach flag so that we fall back to full scan if
810 struct wpa_ssid
*start
= ssid
, *tssid
;
812 if (ssid
== NULL
&& max_ssids
> 1)
813 ssid
= wpa_s
->conf
->ssid
;
815 if (!wpas_network_disabled(wpa_s
, ssid
) &&
817 wpa_hexdump_ascii(MSG_DEBUG
, "Scan SSID",
818 ssid
->ssid
, ssid
->ssid_len
);
819 params
.ssids
[params
.num_ssids
].ssid
=
821 params
.ssids
[params
.num_ssids
].ssid_len
=
824 if (params
.num_ssids
+ 1 >= max_ssids
)
830 if (ssid
== NULL
&& max_ssids
> 1 &&
831 start
!= wpa_s
->conf
->ssid
)
832 ssid
= wpa_s
->conf
->ssid
;
835 if (wpa_s
->scan_id_count
&&
836 wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
)
837 wpa_set_scan_ssids(wpa_s
, ¶ms
, max_ssids
);
839 for (tssid
= wpa_s
->conf
->ssid
;
840 wpa_s
->last_scan_req
!= MANUAL_SCAN_REQ
&& tssid
;
841 tssid
= tssid
->next
) {
842 if (wpas_network_disabled(wpa_s
, tssid
))
844 if ((params
.freqs
|| !freqs_set
) && tssid
->scan_freq
) {
845 int_array_concat(¶ms
.freqs
,
848 os_free(params
.freqs
);
853 int_array_sort_unique(params
.freqs
);
856 if (ssid
&& max_ssids
== 1) {
858 * If the driver is limited to 1 SSID at a time interleave
859 * wildcard SSID scans with specific SSID scans to avoid
860 * waiting a long time for a wildcard scan.
862 if (!wpa_s
->prev_scan_wildcard
) {
863 params
.ssids
[0].ssid
= NULL
;
864 params
.ssids
[0].ssid_len
= 0;
865 wpa_s
->prev_scan_wildcard
= 1;
866 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for "
867 "wildcard SSID (Interleave with specific)");
869 wpa_s
->prev_scan_ssid
= ssid
;
870 wpa_s
->prev_scan_wildcard
= 0;
871 wpa_dbg(wpa_s
, MSG_DEBUG
,
872 "Starting AP scan for specific SSID: %s",
873 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
878 wpa_s
->prev_scan_ssid
= ssid
;
879 wpa_dbg(wpa_s
, MSG_DEBUG
, "Include wildcard SSID in "
882 } else if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
883 wpa_s
->manual_scan_passive
&& params
.num_ssids
== 0) {
884 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use passive scan based on manual request");
885 } else if (wpa_s
->conf
->passive_scan
) {
886 wpa_dbg(wpa_s
, MSG_DEBUG
,
887 "Use passive scan based on configuration");
889 wpa_s
->prev_scan_ssid
= WILDCARD_SSID_SCAN
;
891 wpa_dbg(wpa_s
, MSG_DEBUG
, "Starting AP scan for wildcard "
896 #endif /* CONFIG_P2P */
898 wpa_supplicant_optimize_freqs(wpa_s
, ¶ms
);
899 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
901 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
902 wpa_s
->manual_scan_only_new
) {
903 wpa_printf(MSG_DEBUG
,
904 "Request driver to clear scan cache due to manual only_new=1 scan");
905 params
.only_new_results
= 1;
908 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
== NULL
&&
909 wpa_s
->manual_scan_freqs
) {
910 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit manual scan to specified channels");
911 params
.freqs
= wpa_s
->manual_scan_freqs
;
912 wpa_s
->manual_scan_freqs
= NULL
;
915 if (params
.freqs
== NULL
&& wpa_s
->next_scan_freqs
) {
916 wpa_dbg(wpa_s
, MSG_DEBUG
, "Optimize scan based on previously "
917 "generated frequency list");
918 params
.freqs
= wpa_s
->next_scan_freqs
;
920 os_free(wpa_s
->next_scan_freqs
);
921 wpa_s
->next_scan_freqs
= NULL
;
922 wpa_setband_scan_freqs(wpa_s
, ¶ms
);
924 /* See if user specified frequencies. If so, scan only those. */
925 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
926 wpa_dbg(wpa_s
, MSG_DEBUG
,
927 "Optimize scan based on conf->freq_list");
928 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
931 /* Use current associated channel? */
932 if (wpa_s
->conf
->scan_cur_freq
&& !params
.freqs
) {
933 unsigned int num
= wpa_s
->num_multichan_concurrent
;
935 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
937 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
939 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the "
940 "current operating channels since "
941 "scan_cur_freq is enabled");
943 os_free(params
.freqs
);
949 params
.filter_ssids
= wpa_supplicant_build_filter_ssids(
950 wpa_s
->conf
, ¶ms
.num_filter_ssids
);
952 params
.extra_ies
= wpabuf_head(extra_ie
);
953 params
.extra_ies_len
= wpabuf_len(extra_ie
);
957 if (wpa_s
->p2p_in_provisioning
|| wpa_s
->p2p_in_invitation
||
958 (wpa_s
->show_group_started
&& wpa_s
->go_params
)) {
960 * The interface may not yet be in P2P mode, so we have to
961 * explicitly request P2P probe to disable CCK rates.
963 params
.p2p_probe
= 1;
965 #endif /* CONFIG_P2P */
967 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCAN
) {
968 params
.mac_addr_rand
= 1;
969 if (wpa_s
->mac_addr_scan
) {
970 params
.mac_addr
= wpa_s
->mac_addr_scan
;
971 params
.mac_addr_mask
= wpa_s
->mac_addr_scan
+ ETH_ALEN
;
975 scan_params
= ¶ms
;
980 * If the driver does not support multi-channel concurrency and a
981 * virtual interface that shares the same radio with the wpa_s interface
982 * is operating there may not be need to scan other channels apart from
983 * the current operating channel on the other virtual interface. Filter
984 * out other channels in case we are trying to find a connection for a
985 * station interface when we are not configured to prefer station
986 * connection and a concurrent operation is already in process.
988 if (wpa_s
->scan_for_connection
&&
989 wpa_s
->last_scan_req
== NORMAL_SCAN_REQ
&&
990 !scan_params
->freqs
&& !params
.freqs
&&
991 wpas_is_p2p_prioritized(wpa_s
) &&
992 wpa_s
->p2p_group_interface
== NOT_P2P_GROUP_INTERFACE
&&
993 non_p2p_network_enabled(wpa_s
)) {
994 unsigned int num
= wpa_s
->num_multichan_concurrent
;
996 params
.freqs
= os_calloc(num
+ 1, sizeof(int));
998 num
= get_shared_radio_freqs(wpa_s
, params
.freqs
, num
);
999 if (num
> 0 && num
== wpa_s
->num_multichan_concurrent
) {
1000 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan only the current operating channels since all channels are already used");
1002 os_free(params
.freqs
);
1003 params
.freqs
= NULL
;
1007 #endif /* CONFIG_P2P */
1009 ret
= wpa_supplicant_trigger_scan(wpa_s
, scan_params
);
1011 if (ret
&& wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&& params
.freqs
&&
1012 !wpa_s
->manual_scan_freqs
) {
1013 /* Restore manual_scan_freqs for the next attempt */
1014 wpa_s
->manual_scan_freqs
= params
.freqs
;
1015 params
.freqs
= NULL
;
1018 wpabuf_free(extra_ie
);
1019 os_free(params
.freqs
);
1020 os_free(params
.filter_ssids
);
1023 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate AP scan");
1024 if (wpa_s
->scan_prev_wpa_state
!= wpa_s
->wpa_state
)
1025 wpa_supplicant_set_state(wpa_s
,
1026 wpa_s
->scan_prev_wpa_state
);
1027 /* Restore scan_req since we will try to scan again */
1028 wpa_s
->scan_req
= wpa_s
->last_scan_req
;
1029 wpa_supplicant_req_scan(wpa_s
, 1, 0);
1031 wpa_s
->scan_for_connection
= 0;
1032 #ifdef CONFIG_INTERWORKING
1033 wpa_s
->interworking_fast_assoc_tried
= 0;
1034 #endif /* CONFIG_INTERWORKING */
1039 void wpa_supplicant_update_scan_int(struct wpa_supplicant
*wpa_s
, int sec
)
1041 struct os_reltime remaining
, new_int
;
1044 cancelled
= eloop_cancel_timeout_one(wpa_supplicant_scan
, wpa_s
, NULL
,
1049 if (cancelled
&& os_reltime_before(&remaining
, &new_int
)) {
1050 new_int
.sec
= remaining
.sec
;
1051 new_int
.usec
= remaining
.usec
;
1055 eloop_register_timeout(new_int
.sec
, new_int
.usec
,
1056 wpa_supplicant_scan
, wpa_s
, NULL
);
1058 wpa_s
->scan_interval
= sec
;
1063 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1064 * @wpa_s: Pointer to wpa_supplicant data
1065 * @sec: Number of seconds after which to scan
1066 * @usec: Number of microseconds after which to scan
1068 * This function is used to schedule a scan for neighboring access points after
1069 * the specified time.
1071 void wpa_supplicant_req_scan(struct wpa_supplicant
*wpa_s
, int sec
, int usec
)
1075 if (wpa_s
->p2p_mgmt
) {
1076 wpa_dbg(wpa_s
, MSG_DEBUG
,
1077 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1082 res
= eloop_deplete_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
,
1085 wpa_dbg(wpa_s
, MSG_DEBUG
, "Rescheduling scan request: %d.%06d sec",
1087 } else if (res
== 0) {
1088 wpa_dbg(wpa_s
, MSG_DEBUG
, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1091 wpa_dbg(wpa_s
, MSG_DEBUG
, "Setting scan request: %d.%06d sec",
1093 eloop_register_timeout(sec
, usec
, wpa_supplicant_scan
, wpa_s
, NULL
);
1099 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1100 * @wpa_s: Pointer to wpa_supplicant data
1101 * @sec: Number of seconds after which to scan
1102 * @usec: Number of microseconds after which to scan
1103 * Returns: 0 on success or -1 otherwise
1105 * This function is used to schedule periodic scans for neighboring
1106 * access points after the specified time.
1108 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant
*wpa_s
,
1111 if (!wpa_s
->sched_scan_supported
)
1114 eloop_register_timeout(sec
, usec
,
1115 wpa_supplicant_delayed_sched_scan_timeout
,
1123 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1124 * @wpa_s: Pointer to wpa_supplicant data
1125 * Returns: 0 is sched_scan was started or -1 otherwise
1127 * This function is used to schedule periodic scans for neighboring
1128 * access points repeating the scan continuously.
1130 int wpa_supplicant_req_sched_scan(struct wpa_supplicant
*wpa_s
)
1132 struct wpa_driver_scan_params params
;
1133 struct wpa_driver_scan_params
*scan_params
;
1134 enum wpa_states prev_state
;
1135 struct wpa_ssid
*ssid
= NULL
;
1136 struct wpabuf
*extra_ie
= NULL
;
1138 unsigned int max_sched_scan_ssids
;
1142 if (!wpa_s
->sched_scan_supported
)
1145 if (wpa_s
->max_sched_scan_ssids
> WPAS_MAX_SCAN_SSIDS
)
1146 max_sched_scan_ssids
= WPAS_MAX_SCAN_SSIDS
;
1148 max_sched_scan_ssids
= wpa_s
->max_sched_scan_ssids
;
1149 if (max_sched_scan_ssids
< 1 || wpa_s
->conf
->disable_scan_offload
)
1152 if (wpa_s
->sched_scanning
) {
1153 wpa_dbg(wpa_s
, MSG_DEBUG
, "Already sched scanning");
1158 for (ssid
= wpa_s
->conf
->ssid
; ssid
; ssid
= ssid
->next
) {
1159 if (!wpas_network_disabled(wpa_s
, ssid
) && !ssid
->scan_ssid
) {
1160 /* Use wildcard SSID to find this network */
1162 } else if (!wpas_network_disabled(wpa_s
, ssid
) &&
1167 if (!wpas_network_disabled(wpa_s
, ssid
) &&
1168 ssid
->key_mgmt
== WPA_KEY_MGMT_WPS
) {
1170 * Normal scan is more reliable and faster for WPS
1171 * operations and since these are for short periods of
1172 * time, the benefit of trying to use sched_scan would
1175 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1176 "sched_scan for WPS");
1179 #endif /* CONFIG_WPS */
1184 if (wpa_s
->normal_scans
< 3 &&
1185 (need_ssids
<= wpa_s
->max_scan_ssids
||
1186 wpa_s
->max_scan_ssids
>= (int) max_sched_scan_ssids
)) {
1188 * When normal scan can speed up operations, use that for the
1189 * first operations before starting the sched_scan to allow
1190 * user space sleep more. We do this only if the normal scan
1191 * has functionality that is suitable for this or if the
1192 * sched_scan does not have better support for multiple SSIDs.
1194 wpa_dbg(wpa_s
, MSG_DEBUG
, "Use normal scan instead of "
1195 "sched_scan for initial scans (normal_scans=%d)",
1196 wpa_s
->normal_scans
);
1200 os_memset(¶ms
, 0, sizeof(params
));
1202 /* If we can't allocate space for the filters, we just don't filter */
1203 params
.filter_ssids
= os_calloc(wpa_s
->max_match_sets
,
1204 sizeof(struct wpa_driver_scan_filter
));
1206 prev_state
= wpa_s
->wpa_state
;
1207 if (wpa_s
->wpa_state
== WPA_DISCONNECTED
||
1208 wpa_s
->wpa_state
== WPA_INACTIVE
)
1209 wpa_supplicant_set_state(wpa_s
, WPA_SCANNING
);
1211 if (wpa_s
->autoscan_params
!= NULL
) {
1212 scan_params
= wpa_s
->autoscan_params
;
1216 /* Find the starting point from which to continue scanning */
1217 ssid
= wpa_s
->conf
->ssid
;
1218 if (wpa_s
->prev_sched_ssid
) {
1220 if (ssid
== wpa_s
->prev_sched_ssid
) {
1228 if (!ssid
|| !wpa_s
->prev_sched_ssid
) {
1229 wpa_dbg(wpa_s
, MSG_DEBUG
, "Beginning of SSID list");
1230 if (wpa_s
->conf
->sched_scan_interval
)
1231 wpa_s
->sched_scan_interval
=
1232 wpa_s
->conf
->sched_scan_interval
;
1233 if (wpa_s
->sched_scan_interval
== 0)
1234 wpa_s
->sched_scan_interval
= 10;
1235 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1236 wpa_s
->first_sched_scan
= 1;
1237 ssid
= wpa_s
->conf
->ssid
;
1238 wpa_s
->prev_sched_ssid
= ssid
;
1242 wpa_dbg(wpa_s
, MSG_DEBUG
, "Add wildcard SSID to sched_scan");
1247 if (wpas_network_disabled(wpa_s
, ssid
))
1250 if (params
.num_filter_ssids
< wpa_s
->max_match_sets
&&
1251 params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
) {
1252 wpa_dbg(wpa_s
, MSG_DEBUG
, "add to filter ssid: %s",
1253 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1254 os_memcpy(params
.filter_ssids
[params
.num_filter_ssids
].ssid
,
1255 ssid
->ssid
, ssid
->ssid_len
);
1256 params
.filter_ssids
[params
.num_filter_ssids
].ssid_len
=
1258 params
.num_filter_ssids
++;
1259 } else if (params
.filter_ssids
&& ssid
->ssid
&& ssid
->ssid_len
)
1261 wpa_dbg(wpa_s
, MSG_DEBUG
, "Not enough room for SSID "
1262 "filter for sched_scan - drop filter");
1263 os_free(params
.filter_ssids
);
1264 params
.filter_ssids
= NULL
;
1265 params
.num_filter_ssids
= 0;
1268 if (ssid
->scan_ssid
&& ssid
->ssid
&& ssid
->ssid_len
) {
1269 if (params
.num_ssids
== max_sched_scan_ssids
)
1270 break; /* only room for broadcast SSID */
1271 wpa_dbg(wpa_s
, MSG_DEBUG
,
1272 "add to active scan ssid: %s",
1273 wpa_ssid_txt(ssid
->ssid
, ssid
->ssid_len
));
1274 params
.ssids
[params
.num_ssids
].ssid
=
1276 params
.ssids
[params
.num_ssids
].ssid_len
=
1279 if (params
.num_ssids
>= max_sched_scan_ssids
) {
1280 wpa_s
->prev_sched_ssid
= ssid
;
1284 (wpas_network_disabled(wpa_s
, ssid
) ||
1291 wpa_s
->prev_sched_ssid
= ssid
;
1295 if (params
.num_filter_ssids
== 0) {
1296 os_free(params
.filter_ssids
);
1297 params
.filter_ssids
= NULL
;
1300 extra_ie
= wpa_supplicant_extra_ies(wpa_s
);
1302 params
.extra_ies
= wpabuf_head(extra_ie
);
1303 params
.extra_ies_len
= wpabuf_len(extra_ie
);
1306 if (wpa_s
->conf
->filter_rssi
)
1307 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
1309 /* See if user specified frequencies. If so, scan only those. */
1310 if (wpa_s
->conf
->freq_list
&& !params
.freqs
) {
1311 wpa_dbg(wpa_s
, MSG_DEBUG
,
1312 "Optimize scan based on conf->freq_list");
1313 int_array_concat(¶ms
.freqs
, wpa_s
->conf
->freq_list
);
1316 scan_params
= ¶ms
;
1319 if (ssid
|| !wpa_s
->first_sched_scan
) {
1320 wpa_dbg(wpa_s
, MSG_DEBUG
,
1321 "Starting sched scan: interval %d timeout %d",
1322 wpa_s
->sched_scan_interval
, wpa_s
->sched_scan_timeout
);
1324 wpa_dbg(wpa_s
, MSG_DEBUG
,
1325 "Starting sched scan: interval %d (no timeout)",
1326 wpa_s
->sched_scan_interval
);
1329 wpa_setband_scan_freqs(wpa_s
, scan_params
);
1331 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_SCHED_SCAN
) {
1332 params
.mac_addr_rand
= 1;
1333 if (wpa_s
->mac_addr_sched_scan
) {
1334 params
.mac_addr
= wpa_s
->mac_addr_sched_scan
;
1335 params
.mac_addr_mask
= wpa_s
->mac_addr_sched_scan
+
1340 ret
= wpa_supplicant_start_sched_scan(wpa_s
, scan_params
,
1341 wpa_s
->sched_scan_interval
);
1342 wpabuf_free(extra_ie
);
1343 os_free(params
.filter_ssids
);
1345 wpa_msg(wpa_s
, MSG_WARNING
, "Failed to initiate sched scan");
1346 if (prev_state
!= wpa_s
->wpa_state
)
1347 wpa_supplicant_set_state(wpa_s
, prev_state
);
1351 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1352 if (ssid
|| !wpa_s
->first_sched_scan
) {
1353 wpa_s
->sched_scan_timed_out
= 0;
1354 eloop_register_timeout(wpa_s
->sched_scan_timeout
, 0,
1355 wpa_supplicant_sched_scan_timeout
,
1357 wpa_s
->first_sched_scan
= 0;
1358 wpa_s
->sched_scan_timeout
/= 2;
1359 wpa_s
->sched_scan_interval
*= 2;
1360 if (wpa_s
->sched_scan_timeout
< wpa_s
->sched_scan_interval
) {
1361 wpa_s
->sched_scan_interval
= 10;
1362 wpa_s
->sched_scan_timeout
= max_sched_scan_ssids
* 2;
1366 /* If there is no more ssids, start next time from the beginning */
1368 wpa_s
->prev_sched_ssid
= NULL
;
1375 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1376 * @wpa_s: Pointer to wpa_supplicant data
1378 * This function is used to cancel a scan request scheduled with
1379 * wpa_supplicant_req_scan().
1381 void wpa_supplicant_cancel_scan(struct wpa_supplicant
*wpa_s
)
1383 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling scan request");
1384 eloop_cancel_timeout(wpa_supplicant_scan
, wpa_s
, NULL
);
1389 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1390 * @wpa_s: Pointer to wpa_supplicant data
1392 * This function is used to stop a delayed scheduled scan.
1394 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant
*wpa_s
)
1396 if (!wpa_s
->sched_scan_supported
)
1399 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling delayed sched scan");
1400 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout
,
1406 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1407 * @wpa_s: Pointer to wpa_supplicant data
1409 * This function is used to stop a periodic scheduled scan.
1411 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant
*wpa_s
)
1413 if (!wpa_s
->sched_scanning
)
1416 wpa_dbg(wpa_s
, MSG_DEBUG
, "Cancelling sched scan");
1417 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout
, wpa_s
, NULL
);
1418 wpa_supplicant_stop_sched_scan(wpa_s
);
1423 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1424 * @wpa_s: Pointer to wpa_supplicant data
1425 * @scanning: Whether scanning is currently in progress
1427 * This function is to generate scanning notifycations. It is called whenever
1428 * there may have been a change in scanning (scan started, completed, stopped).
1429 * wpas_notify_scanning() is called whenever the scanning state changed from the
1430 * previously notified state.
1432 void wpa_supplicant_notify_scanning(struct wpa_supplicant
*wpa_s
,
1435 if (wpa_s
->scanning
!= scanning
) {
1436 wpa_s
->scanning
= scanning
;
1437 wpas_notify_scanning(wpa_s
);
1442 static int wpa_scan_get_max_rate(const struct wpa_scan_res
*res
)
1448 ie
= wpa_scan_get_ie(res
, WLAN_EID_SUPP_RATES
);
1449 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1450 if ((ie
[i
+ 2] & 0x7f) > rate
)
1451 rate
= ie
[i
+ 2] & 0x7f;
1454 ie
= wpa_scan_get_ie(res
, WLAN_EID_EXT_SUPP_RATES
);
1455 for (i
= 0; ie
&& i
< ie
[1]; i
++) {
1456 if ((ie
[i
+ 2] & 0x7f) > rate
)
1457 rate
= ie
[i
+ 2] & 0x7f;
1465 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1466 * @res: Scan result entry
1467 * @ie: Information element identitifier (WLAN_EID_*)
1468 * Returns: Pointer to the information element (id field) or %NULL if not found
1470 * This function returns the first matching information element in the scan
1473 const u8
* wpa_scan_get_ie(const struct wpa_scan_res
*res
, u8 ie
)
1475 const u8
*end
, *pos
;
1477 pos
= (const u8
*) (res
+ 1);
1478 end
= pos
+ res
->ie_len
;
1480 while (pos
+ 1 < end
) {
1481 if (pos
+ 2 + pos
[1] > end
)
1493 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1494 * @res: Scan result entry
1495 * @vendor_type: Vendor type (four octets starting the IE payload)
1496 * Returns: Pointer to the information element (id field) or %NULL if not found
1498 * This function returns the first matching information element in the scan
1501 const u8
* wpa_scan_get_vendor_ie(const struct wpa_scan_res
*res
,
1504 const u8
*end
, *pos
;
1506 pos
= (const u8
*) (res
+ 1);
1507 end
= pos
+ res
->ie_len
;
1509 while (pos
+ 1 < end
) {
1510 if (pos
+ 2 + pos
[1] > end
)
1512 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1513 vendor_type
== WPA_GET_BE32(&pos
[2]))
1523 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1524 * @res: Scan result entry
1525 * @vendor_type: Vendor type (four octets starting the IE payload)
1526 * Returns: Pointer to the information element (id field) or %NULL if not found
1528 * This function returns the first matching information element in the scan
1531 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1532 * from Beacon frames instead of either Beacon or Probe Response frames.
1534 const u8
* wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res
*res
,
1537 const u8
*end
, *pos
;
1539 if (res
->beacon_ie_len
== 0)
1542 pos
= (const u8
*) (res
+ 1);
1544 end
= pos
+ res
->beacon_ie_len
;
1546 while (pos
+ 1 < end
) {
1547 if (pos
+ 2 + pos
[1] > end
)
1549 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1550 vendor_type
== WPA_GET_BE32(&pos
[2]))
1560 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1561 * @res: Scan result entry
1562 * @vendor_type: Vendor type (four octets starting the IE payload)
1563 * Returns: Pointer to the information element payload or %NULL if not found
1565 * This function returns concatenated payload of possibly fragmented vendor
1566 * specific information elements in the scan result. The caller is responsible
1567 * for freeing the returned buffer.
1569 struct wpabuf
* wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res
*res
,
1573 const u8
*end
, *pos
;
1575 buf
= wpabuf_alloc(res
->ie_len
);
1579 pos
= (const u8
*) (res
+ 1);
1580 end
= pos
+ res
->ie_len
;
1582 while (pos
+ 1 < end
) {
1583 if (pos
+ 2 + pos
[1] > end
)
1585 if (pos
[0] == WLAN_EID_VENDOR_SPECIFIC
&& pos
[1] >= 4 &&
1586 vendor_type
== WPA_GET_BE32(&pos
[2]))
1587 wpabuf_put_data(buf
, pos
+ 2 + 4, pos
[1] - 4);
1591 if (wpabuf_len(buf
) == 0) {
1601 * Channels with a great SNR can operate at full rate. What is a great SNR?
1602 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1603 * rule of thumb is that any SNR above 20 is good." This one
1604 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
1605 * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a
1606 * conservative value.
1608 #define GREAT_SNR 30
1610 #define IS_5GHZ(n) (n > 4000)
1612 /* Compare function for sorting scan results. Return >0 if @b is considered
1614 static int wpa_scan_result_compar(const void *a
, const void *b
)
1616 #define MIN(a,b) a < b ? a : b
1617 struct wpa_scan_res
**_wa
= (void *) a
;
1618 struct wpa_scan_res
**_wb
= (void *) b
;
1619 struct wpa_scan_res
*wa
= *_wa
;
1620 struct wpa_scan_res
*wb
= *_wb
;
1622 int snr_a
, snr_b
, snr_a_full
, snr_b_full
;
1624 /* WPA/WPA2 support preferred */
1625 wpa_a
= wpa_scan_get_vendor_ie(wa
, WPA_IE_VENDOR_TYPE
) != NULL
||
1626 wpa_scan_get_ie(wa
, WLAN_EID_RSN
) != NULL
;
1627 wpa_b
= wpa_scan_get_vendor_ie(wb
, WPA_IE_VENDOR_TYPE
) != NULL
||
1628 wpa_scan_get_ie(wb
, WLAN_EID_RSN
) != NULL
;
1630 if (wpa_b
&& !wpa_a
)
1632 if (!wpa_b
&& wpa_a
)
1635 /* privacy support preferred */
1636 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) == 0 &&
1637 (wb
->caps
& IEEE80211_CAP_PRIVACY
))
1639 if ((wa
->caps
& IEEE80211_CAP_PRIVACY
) &&
1640 (wb
->caps
& IEEE80211_CAP_PRIVACY
) == 0)
1643 if (wa
->flags
& wb
->flags
& WPA_SCAN_LEVEL_DBM
) {
1644 snr_a_full
= wa
->snr
;
1645 snr_a
= MIN(wa
->snr
, GREAT_SNR
);
1646 snr_b_full
= wb
->snr
;
1647 snr_b
= MIN(wa
->snr
, GREAT_SNR
);
1649 /* Level is not in dBm, so we can't calculate
1650 * SNR. Just use raw level (units unknown). */
1651 snr_a
= snr_a_full
= wa
->level
;
1652 snr_b
= snr_b_full
= wb
->level
;
1655 /* if SNR is close, decide by max rate or frequency band */
1656 if ((snr_a
&& snr_b
&& abs(snr_b
- snr_a
) < 5) ||
1657 (wa
->qual
&& wb
->qual
&& abs(wb
->qual
- wa
->qual
) < 10)) {
1658 if (wa
->est_throughput
!= wb
->est_throughput
)
1659 return wb
->est_throughput
- wa
->est_throughput
;
1660 if (IS_5GHZ(wa
->freq
) ^ IS_5GHZ(wb
->freq
))
1661 return IS_5GHZ(wa
->freq
) ? -1 : 1;
1664 /* all things being equal, use SNR; if SNRs are
1665 * identical, use quality values since some drivers may only report
1666 * that value and leave the signal level zero */
1667 if (snr_b_full
== snr_a_full
)
1668 return wb
->qual
- wa
->qual
;
1669 return snr_b_full
- snr_a_full
;
1675 /* Compare function for sorting scan results when searching a WPS AP for
1676 * provisioning. Return >0 if @b is considered better. */
1677 static int wpa_scan_result_wps_compar(const void *a
, const void *b
)
1679 struct wpa_scan_res
**_wa
= (void *) a
;
1680 struct wpa_scan_res
**_wb
= (void *) b
;
1681 struct wpa_scan_res
*wa
= *_wa
;
1682 struct wpa_scan_res
*wb
= *_wb
;
1683 int uses_wps_a
, uses_wps_b
;
1684 struct wpabuf
*wps_a
, *wps_b
;
1687 /* Optimization - check WPS IE existence before allocated memory and
1688 * doing full reassembly. */
1689 uses_wps_a
= wpa_scan_get_vendor_ie(wa
, WPS_IE_VENDOR_TYPE
) != NULL
;
1690 uses_wps_b
= wpa_scan_get_vendor_ie(wb
, WPS_IE_VENDOR_TYPE
) != NULL
;
1691 if (uses_wps_a
&& !uses_wps_b
)
1693 if (!uses_wps_a
&& uses_wps_b
)
1696 if (uses_wps_a
&& uses_wps_b
) {
1697 wps_a
= wpa_scan_get_vendor_ie_multi(wa
, WPS_IE_VENDOR_TYPE
);
1698 wps_b
= wpa_scan_get_vendor_ie_multi(wb
, WPS_IE_VENDOR_TYPE
);
1699 res
= wps_ap_priority_compar(wps_a
, wps_b
);
1707 * Do not use current AP security policy as a sorting criteria during
1708 * WPS provisioning step since the AP may get reconfigured at the
1709 * completion of provisioning.
1712 /* all things being equal, use signal level; if signal levels are
1713 * identical, use quality values since some drivers may only report
1714 * that value and leave the signal level zero */
1715 if (wb
->level
== wa
->level
)
1716 return wb
->qual
- wa
->qual
;
1717 return wb
->level
- wa
->level
;
1719 #endif /* CONFIG_WPS */
1722 static void dump_scan_res(struct wpa_scan_results
*scan_res
)
1724 #ifndef CONFIG_NO_STDOUT_DEBUG
1727 if (scan_res
->res
== NULL
|| scan_res
->num
== 0)
1730 wpa_printf(MSG_EXCESSIVE
, "Sorted scan results");
1732 for (i
= 0; i
< scan_res
->num
; i
++) {
1733 struct wpa_scan_res
*r
= scan_res
->res
[i
];
1735 if (r
->flags
& WPA_SCAN_LEVEL_DBM
) {
1736 int noise_valid
= !(r
->flags
& WPA_SCAN_NOISE_INVALID
);
1738 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
1739 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
1740 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
1741 r
->noise
, noise_valid
? "" : "~", r
->level
,
1742 r
->snr
, r
->snr
>= GREAT_SNR
? "*" : "",
1744 r
->age
, r
->est_throughput
);
1746 wpa_printf(MSG_EXCESSIVE
, MACSTR
" freq=%d qual=%d "
1747 "noise=%d level=%d flags=0x%x age=%u est=%u",
1748 MAC2STR(r
->bssid
), r
->freq
, r
->qual
,
1749 r
->noise
, r
->level
, r
->flags
, r
->age
,
1752 pos
= (u8
*) (r
+ 1);
1754 wpa_hexdump(MSG_EXCESSIVE
, "IEs", pos
, r
->ie_len
);
1756 if (r
->beacon_ie_len
)
1757 wpa_hexdump(MSG_EXCESSIVE
, "Beacon IEs",
1758 pos
, r
->beacon_ie_len
);
1760 #endif /* CONFIG_NO_STDOUT_DEBUG */
1765 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
1766 * @wpa_s: Pointer to wpa_supplicant data
1767 * @bssid: BSSID to check
1768 * Returns: 0 if the BSSID is filtered or 1 if not
1770 * This function is used to filter out specific BSSIDs from scan reslts mainly
1771 * for testing purposes (SET bssid_filter ctrl_iface command).
1773 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant
*wpa_s
,
1778 if (wpa_s
->bssid_filter
== NULL
)
1781 for (i
= 0; i
< wpa_s
->bssid_filter_count
; i
++) {
1782 if (os_memcmp(wpa_s
->bssid_filter
+ i
* ETH_ALEN
, bssid
,
1791 static void filter_scan_res(struct wpa_supplicant
*wpa_s
,
1792 struct wpa_scan_results
*res
)
1796 if (wpa_s
->bssid_filter
== NULL
)
1799 for (i
= 0, j
= 0; i
< res
->num
; i
++) {
1800 if (wpa_supplicant_filter_bssid_match(wpa_s
,
1801 res
->res
[i
]->bssid
)) {
1802 res
->res
[j
++] = res
->res
[i
];
1804 os_free(res
->res
[i
]);
1809 if (res
->num
!= j
) {
1810 wpa_printf(MSG_DEBUG
, "Filtered out %d scan results",
1811 (int) (res
->num
- j
));
1818 * Noise floor values to use when we have signal strength
1819 * measurements, but no noise floor measurments. These values were
1820 * measured in an office environment with many APs.
1822 #define DEFAULT_NOISE_FLOOR_2GHZ (-89)
1823 #define DEFAULT_NOISE_FLOOR_5GHZ (-92)
1825 static void scan_snr(struct wpa_scan_res
*res
)
1827 if (res
->flags
& WPA_SCAN_NOISE_INVALID
) {
1828 res
->noise
= IS_5GHZ(res
->freq
) ?
1829 DEFAULT_NOISE_FLOOR_5GHZ
:
1830 DEFAULT_NOISE_FLOOR_2GHZ
;
1833 if (res
->flags
& WPA_SCAN_LEVEL_DBM
) {
1834 res
->snr
= res
->level
- res
->noise
;
1836 /* Level is not in dBm, so we can't calculate
1837 * SNR. Just use raw level (units unknown). */
1838 res
->snr
= res
->level
;
1843 static unsigned int max_ht20_rate(int snr
)
1846 return 6500; /* HT20 MCS0 */
1848 return 13000; /* HT20 MCS1 */
1850 return 19500; /* HT20 MCS2 */
1852 return 26000; /* HT20 MCS3 */
1854 return 39000; /* HT20 MCS4 */
1856 return 52000; /* HT20 MCS5 */
1858 return 58500; /* HT20 MCS6 */
1859 return 65000; /* HT20 MCS7 */
1863 static unsigned int max_ht40_rate(int snr
)
1866 return 13500; /* HT40 MCS0 */
1868 return 27000; /* HT40 MCS1 */
1870 return 40500; /* HT40 MCS2 */
1872 return 54000; /* HT40 MCS3 */
1874 return 81000; /* HT40 MCS4 */
1876 return 108000; /* HT40 MCS5 */
1878 return 121500; /* HT40 MCS6 */
1879 return 135000; /* HT40 MCS7 */
1883 static unsigned int max_vht80_rate(int snr
)
1888 return 29300; /* VHT80 MCS0 */
1890 return 58500; /* VHT80 MCS1 */
1892 return 87800; /* VHT80 MCS2 */
1894 return 117000; /* VHT80 MCS3 */
1896 return 175500; /* VHT80 MCS4 */
1898 return 234000; /* VHT80 MCS5 */
1900 return 263300; /* VHT80 MCS6 */
1902 return 292500; /* VHT80 MCS7 */
1904 return 351000; /* VHT80 MCS8 */
1905 return 390000; /* VHT80 MCS9 */
1909 static void scan_est_throughput(struct wpa_supplicant
*wpa_s
,
1910 struct wpa_scan_res
*res
)
1912 enum local_hw_capab capab
= wpa_s
->hw_capab
;
1913 int rate
; /* max legacy rate in 500 kb/s units */
1915 unsigned int est
, tmp
;
1918 if (res
->est_throughput
)
1921 /* Get maximum legacy rate */
1922 rate
= wpa_scan_get_max_rate(res
);
1924 /* Limit based on estimated SNR */
1925 if (rate
> 1 * 2 && snr
< 1)
1927 else if (rate
> 2 * 2 && snr
< 4)
1929 else if (rate
> 6 * 2 && snr
< 5)
1931 else if (rate
> 9 * 2 && snr
< 6)
1933 else if (rate
> 12 * 2 && snr
< 7)
1935 else if (rate
> 18 * 2 && snr
< 10)
1937 else if (rate
> 24 * 2 && snr
< 11)
1939 else if (rate
> 36 * 2 && snr
< 15)
1941 else if (rate
> 48 * 2 && snr
< 19)
1943 else if (rate
> 54 * 2 && snr
< 21)
1947 if (capab
== CAPAB_HT
|| capab
== CAPAB_HT40
|| capab
== CAPAB_VHT
) {
1948 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_CAP
);
1950 tmp
= max_ht20_rate(snr
);
1956 if (capab
== CAPAB_HT40
|| capab
== CAPAB_VHT
) {
1957 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_OPERATION
);
1958 if (ie
&& ie
[1] >= 2 &&
1959 (ie
[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK
)) {
1960 tmp
= max_ht40_rate(snr
);
1966 if (capab
== CAPAB_VHT
) {
1967 /* Use +1 to assume VHT is always faster than HT */
1968 ie
= wpa_scan_get_ie(res
, WLAN_EID_VHT_CAP
);
1970 tmp
= max_ht20_rate(snr
) + 1;
1974 ie
= wpa_scan_get_ie(res
, WLAN_EID_HT_OPERATION
);
1975 if (ie
&& ie
[1] >= 2 &&
1977 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK
)) {
1978 tmp
= max_ht40_rate(snr
) + 1;
1983 ie
= wpa_scan_get_ie(res
, WLAN_EID_VHT_OPERATION
);
1984 if (ie
&& ie
[1] >= 1 &&
1985 (ie
[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK
)) {
1986 tmp
= max_vht80_rate(snr
) + 1;
1993 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
1995 res
->est_throughput
= est
;
2000 * wpa_supplicant_get_scan_results - Get scan results
2001 * @wpa_s: Pointer to wpa_supplicant data
2002 * @info: Information about what was scanned or %NULL if not available
2003 * @new_scan: Whether a new scan was performed
2004 * Returns: Scan results, %NULL on failure
2006 * This function request the current scan results from the driver and updates
2007 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2008 * results with wpa_scan_results_free().
2010 struct wpa_scan_results
*
2011 wpa_supplicant_get_scan_results(struct wpa_supplicant
*wpa_s
,
2012 struct scan_info
*info
, int new_scan
)
2014 struct wpa_scan_results
*scan_res
;
2016 int (*compar
)(const void *, const void *) = wpa_scan_result_compar
;
2018 scan_res
= wpa_drv_get_scan_results2(wpa_s
);
2019 if (scan_res
== NULL
) {
2020 wpa_dbg(wpa_s
, MSG_DEBUG
, "Failed to get scan results");
2023 if (scan_res
->fetch_time
.sec
== 0) {
2025 * Make sure we have a valid timestamp if the driver wrapper
2026 * does not set this.
2028 os_get_reltime(&scan_res
->fetch_time
);
2030 filter_scan_res(wpa_s
, scan_res
);
2032 for (i
= 0; i
< scan_res
->num
; i
++) {
2033 struct wpa_scan_res
*scan_res_item
= scan_res
->res
[i
];
2035 scan_snr(scan_res_item
);
2036 scan_est_throughput(wpa_s
, scan_res_item
);
2040 if (wpas_wps_searching(wpa_s
)) {
2041 wpa_dbg(wpa_s
, MSG_DEBUG
, "WPS: Order scan results with WPS "
2042 "provisioning rules");
2043 compar
= wpa_scan_result_wps_compar
;
2045 #endif /* CONFIG_WPS */
2047 qsort(scan_res
->res
, scan_res
->num
, sizeof(struct wpa_scan_res
*),
2049 dump_scan_res(scan_res
);
2051 wpa_bss_update_start(wpa_s
);
2052 for (i
= 0; i
< scan_res
->num
; i
++)
2053 wpa_bss_update_scan_res(wpa_s
, scan_res
->res
[i
],
2054 &scan_res
->fetch_time
);
2055 wpa_bss_update_end(wpa_s
, info
, new_scan
);
2062 * wpa_supplicant_update_scan_results - Update scan results from the driver
2063 * @wpa_s: Pointer to wpa_supplicant data
2064 * Returns: 0 on success, -1 on failure
2066 * This function updates the BSS table within wpa_supplicant based on the
2067 * currently available scan results from the driver without requesting a new
2068 * scan. This is used in cases where the driver indicates an association
2069 * (including roaming within ESS) and wpa_supplicant does not yet have the
2070 * needed information to complete the connection (e.g., to perform validation
2071 * steps in 4-way handshake).
2073 int wpa_supplicant_update_scan_results(struct wpa_supplicant
*wpa_s
)
2075 struct wpa_scan_results
*scan_res
;
2076 scan_res
= wpa_supplicant_get_scan_results(wpa_s
, NULL
, 0);
2077 if (scan_res
== NULL
)
2079 wpa_scan_results_free(scan_res
);
2086 * scan_only_handler - Reports scan results
2088 void scan_only_handler(struct wpa_supplicant
*wpa_s
,
2089 struct wpa_scan_results
*scan_res
)
2091 wpa_dbg(wpa_s
, MSG_DEBUG
, "Scan-only results received");
2092 if (wpa_s
->last_scan_req
== MANUAL_SCAN_REQ
&&
2093 wpa_s
->manual_scan_use_id
&& wpa_s
->own_scan_running
) {
2094 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
"id=%u",
2095 wpa_s
->manual_scan_id
);
2096 wpa_s
->manual_scan_use_id
= 0;
2098 wpa_msg_ctrl(wpa_s
, MSG_INFO
, WPA_EVENT_SCAN_RESULTS
);
2100 wpas_notify_scan_results(wpa_s
);
2101 wpas_notify_scan_done(wpa_s
, 1);
2102 if (wpa_s
->scan_work
) {
2103 struct wpa_radio_work
*work
= wpa_s
->scan_work
;
2104 wpa_s
->scan_work
= NULL
;
2105 radio_work_done(work
);
2110 int wpas_scan_scheduled(struct wpa_supplicant
*wpa_s
)
2112 return eloop_is_timeout_registered(wpa_supplicant_scan
, wpa_s
, NULL
);
2116 struct wpa_driver_scan_params
*
2117 wpa_scan_clone_params(const struct wpa_driver_scan_params
*src
)
2119 struct wpa_driver_scan_params
*params
;
2123 params
= os_zalloc(sizeof(*params
));
2127 for (i
= 0; i
< src
->num_ssids
; i
++) {
2128 if (src
->ssids
[i
].ssid
) {
2129 n
= os_malloc(src
->ssids
[i
].ssid_len
);
2132 os_memcpy(n
, src
->ssids
[i
].ssid
,
2133 src
->ssids
[i
].ssid_len
);
2134 params
->ssids
[i
].ssid
= n
;
2135 params
->ssids
[i
].ssid_len
= src
->ssids
[i
].ssid_len
;
2138 params
->num_ssids
= src
->num_ssids
;
2140 if (src
->extra_ies
) {
2141 n
= os_malloc(src
->extra_ies_len
);
2144 os_memcpy(n
, src
->extra_ies
, src
->extra_ies_len
);
2145 params
->extra_ies
= n
;
2146 params
->extra_ies_len
= src
->extra_ies_len
;
2150 int len
= int_array_len(src
->freqs
);
2151 params
->freqs
= os_malloc((len
+ 1) * sizeof(int));
2152 if (params
->freqs
== NULL
)
2154 os_memcpy(params
->freqs
, src
->freqs
, (len
+ 1) * sizeof(int));
2157 if (src
->filter_ssids
) {
2158 params
->filter_ssids
= os_malloc(sizeof(*params
->filter_ssids
) *
2159 src
->num_filter_ssids
);
2160 if (params
->filter_ssids
== NULL
)
2162 os_memcpy(params
->filter_ssids
, src
->filter_ssids
,
2163 sizeof(*params
->filter_ssids
) *
2164 src
->num_filter_ssids
);
2165 params
->num_filter_ssids
= src
->num_filter_ssids
;
2168 params
->filter_rssi
= src
->filter_rssi
;
2169 params
->p2p_probe
= src
->p2p_probe
;
2170 params
->only_new_results
= src
->only_new_results
;
2171 params
->low_priority
= src
->low_priority
;
2173 if (src
->mac_addr_rand
) {
2174 params
->mac_addr_rand
= src
->mac_addr_rand
;
2176 if (src
->mac_addr
&& src
->mac_addr_mask
) {
2179 mac_addr
= os_malloc(2 * ETH_ALEN
);
2183 os_memcpy(mac_addr
, src
->mac_addr
, ETH_ALEN
);
2184 os_memcpy(mac_addr
+ ETH_ALEN
, src
->mac_addr_mask
,
2186 params
->mac_addr
= mac_addr
;
2187 params
->mac_addr_mask
= mac_addr
+ ETH_ALEN
;
2193 wpa_scan_free_params(params
);
2198 void wpa_scan_free_params(struct wpa_driver_scan_params
*params
)
2205 for (i
= 0; i
< params
->num_ssids
; i
++)
2206 os_free((u8
*) params
->ssids
[i
].ssid
);
2207 os_free((u8
*) params
->extra_ies
);
2208 os_free(params
->freqs
);
2209 os_free(params
->filter_ssids
);
2212 * Note: params->mac_addr_mask points to same memory allocation and
2213 * must not be freed separately.
2215 os_free((u8
*) params
->mac_addr
);
2221 int wpas_start_pno(struct wpa_supplicant
*wpa_s
)
2223 int ret
, interval
, prio
;
2224 size_t i
, num_ssid
, num_match_ssid
;
2225 struct wpa_ssid
*ssid
;
2226 struct wpa_driver_scan_params params
;
2228 if (!wpa_s
->sched_scan_supported
)
2231 if (wpa_s
->pno
|| wpa_s
->pno_sched_pending
)
2234 if ((wpa_s
->wpa_state
> WPA_SCANNING
) &&
2235 (wpa_s
->wpa_state
<= WPA_COMPLETED
)) {
2236 wpa_printf(MSG_ERROR
, "PNO: In assoc process");
2240 if (wpa_s
->wpa_state
== WPA_SCANNING
) {
2241 wpa_supplicant_cancel_scan(wpa_s
);
2242 if (wpa_s
->sched_scanning
) {
2243 wpa_printf(MSG_DEBUG
, "Schedule PNO on completion of "
2244 "ongoing sched scan");
2245 wpa_supplicant_cancel_sched_scan(wpa_s
);
2246 wpa_s
->pno_sched_pending
= 1;
2251 os_memset(¶ms
, 0, sizeof(params
));
2253 num_ssid
= num_match_ssid
= 0;
2254 ssid
= wpa_s
->conf
->ssid
;
2256 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2258 if (ssid
->scan_ssid
)
2264 if (num_match_ssid
== 0) {
2265 wpa_printf(MSG_DEBUG
, "PNO: No configured SSIDs");
2269 if (num_match_ssid
> num_ssid
) {
2270 params
.num_ssids
++; /* wildcard */
2274 if (num_ssid
> WPAS_MAX_SCAN_SSIDS
) {
2275 wpa_printf(MSG_DEBUG
, "PNO: Use only the first %u SSIDs from "
2276 "%u", WPAS_MAX_SCAN_SSIDS
, (unsigned int) num_ssid
);
2277 num_ssid
= WPAS_MAX_SCAN_SSIDS
;
2280 if (num_match_ssid
> wpa_s
->max_match_sets
) {
2281 num_match_ssid
= wpa_s
->max_match_sets
;
2282 wpa_dbg(wpa_s
, MSG_DEBUG
, "PNO: Too many SSIDs to match");
2284 params
.filter_ssids
= os_calloc(num_match_ssid
,
2285 sizeof(struct wpa_driver_scan_filter
));
2286 if (params
.filter_ssids
== NULL
)
2291 ssid
= wpa_s
->conf
->pssid
[prio
];
2293 if (!wpas_network_disabled(wpa_s
, ssid
)) {
2294 if (ssid
->scan_ssid
&& params
.num_ssids
< num_ssid
) {
2295 params
.ssids
[params
.num_ssids
].ssid
=
2297 params
.ssids
[params
.num_ssids
].ssid_len
=
2301 os_memcpy(params
.filter_ssids
[i
].ssid
, ssid
->ssid
,
2303 params
.filter_ssids
[i
].ssid_len
= ssid
->ssid_len
;
2304 params
.num_filter_ssids
++;
2306 if (i
== num_match_ssid
)
2311 else if (prio
+ 1 == wpa_s
->conf
->num_prio
)
2314 ssid
= wpa_s
->conf
->pssid
[++prio
];
2317 if (wpa_s
->conf
->filter_rssi
)
2318 params
.filter_rssi
= wpa_s
->conf
->filter_rssi
;
2320 interval
= wpa_s
->conf
->sched_scan_interval
?
2321 wpa_s
->conf
->sched_scan_interval
: 10;
2323 if (params
.freqs
== NULL
&& wpa_s
->manual_sched_scan_freqs
) {
2324 wpa_dbg(wpa_s
, MSG_DEBUG
, "Limit sched scan to specified channels");
2325 params
.freqs
= wpa_s
->manual_sched_scan_freqs
;
2328 if (wpa_s
->mac_addr_rand_enable
& MAC_ADDR_RAND_PNO
) {
2329 params
.mac_addr_rand
= 1;
2330 if (wpa_s
->mac_addr_pno
) {
2331 params
.mac_addr
= wpa_s
->mac_addr_pno
;
2332 params
.mac_addr_mask
= wpa_s
->mac_addr_pno
+ ETH_ALEN
;
2336 ret
= wpa_supplicant_start_sched_scan(wpa_s
, ¶ms
, interval
);
2337 os_free(params
.filter_ssids
);
2341 wpa_msg(wpa_s
, MSG_ERROR
, "Failed to schedule PNO");
2346 int wpas_stop_pno(struct wpa_supplicant
*wpa_s
)
2353 ret
= wpa_supplicant_stop_sched_scan(wpa_s
);
2356 wpa_s
->pno_sched_pending
= 0;
2358 if (wpa_s
->wpa_state
== WPA_SCANNING
)
2359 wpa_supplicant_req_scan(wpa_s
, 0, 0);
2365 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant
*wpa_s
,
2368 type
&= MAC_ADDR_RAND_ALL
;
2369 wpa_s
->mac_addr_rand_enable
&= ~type
;
2371 if (type
& MAC_ADDR_RAND_SCAN
) {
2372 os_free(wpa_s
->mac_addr_scan
);
2373 wpa_s
->mac_addr_scan
= NULL
;
2376 if (type
& MAC_ADDR_RAND_SCHED_SCAN
) {
2377 os_free(wpa_s
->mac_addr_sched_scan
);
2378 wpa_s
->mac_addr_sched_scan
= NULL
;
2381 if (type
& MAC_ADDR_RAND_PNO
) {
2382 os_free(wpa_s
->mac_addr_pno
);
2383 wpa_s
->mac_addr_pno
= NULL
;
2388 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant
*wpa_s
,
2389 unsigned int type
, const u8
*addr
,
2394 wpas_mac_addr_rand_scan_clear(wpa_s
, type
);
2397 tmp
= os_malloc(2 * ETH_ALEN
);
2400 os_memcpy(tmp
, addr
, ETH_ALEN
);
2401 os_memcpy(tmp
+ ETH_ALEN
, mask
, ETH_ALEN
);
2404 if (type
== MAC_ADDR_RAND_SCAN
) {
2405 wpa_s
->mac_addr_scan
= tmp
;
2406 } else if (type
== MAC_ADDR_RAND_SCHED_SCAN
) {
2407 wpa_s
->mac_addr_sched_scan
= tmp
;
2408 } else if (type
== MAC_ADDR_RAND_PNO
) {
2409 wpa_s
->mac_addr_pno
= tmp
;
2411 wpa_printf(MSG_INFO
,
2412 "scan: Invalid MAC randomization type=0x%x",
2418 wpa_s
->mac_addr_rand_enable
|= type
;