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[thirdparty/hostap.git] / wpa_supplicant / scan.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA Supplicant - Scanning
dd43aaa5 3 * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
9ba9fa07 9#include "utils/includes.h"
6fc6879b 10
9ba9fa07
JM		 11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "common/ieee802_11_defs.h"
66fe0f70 14#include "common/wpa_ctrl.h"
6fc6879b
JM		 15#include "config.h"
16#include "wpa_supplicant_i.h"
2d5b792d 17#include "driver_i.h"
b01c18a8 18#include "wps_supplicant.h"
0e65037c
JM		 19#include "p2p_supplicant.h"
20#include "p2p/p2p.h"
c923b8a5 21#include "hs20_supplicant.h"
8bac466b 22#include "notify.h"
9ba9fa07
JM		 23#include "bss.h"
24#include "scan.h"
fbca4c89 25#include "mesh.h"
6fc6879b
JM		 26
27
28static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s)
29{
30 struct wpa_ssid *ssid;
31 union wpa_event_data data;
32
33 ssid = wpa_supplicant_get_ssid(wpa_s);
34 if (ssid == NULL)
35 return;
36
8bac466b 37 if (wpa_s->current_ssid == NULL) {
6fc6879b 38 wpa_s->current_ssid = ssid;
e1ae2876 39 wpas_notify_network_changed(wpa_s);
8bac466b 40 }
6fc6879b 41 wpa_supplicant_initiate_eapol(wpa_s);
f049052b
BG		 42 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured "
43 "network - generating associated event");
6fc6879b
JM		 44 os_memset(&data, 0, sizeof(data));
45 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
46}
47
48
ad08c363 49#ifdef CONFIG_WPS
5f738a21 50static int wpas_wps_in_use(struct wpa_supplicant *wpa_s,
f90c86d4 51 enum wps_request_type *req_type)
ad08c363
JM		 52{
53 struct wpa_ssid *ssid;
54 int wps = 0;
ad08c363 55
5f738a21 56 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
ad08c363
JM		 57 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
58 continue;
59
60 wps = 1;
b01c18a8 61 *req_type = wpas_wps_get_req_type(ssid);
88802405 62 if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1"))
ad08c363
JM		 63 return 2;
64 }
65
5f738a21 66#ifdef CONFIG_P2P
7a808c7e
JM		 67 if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
68 !wpa_s->conf->p2p_disabled) {
b21ff9cb
JM		 69 wpa_s->wps->dev.p2p = 1;
70 if (!wps) {
71 wps = 1;
72 *req_type = WPS_REQ_ENROLLEE_INFO;
73 }
5f738a21
LC		 74 }
75#endif /* CONFIG_P2P */
76
ad08c363
JM		 77 return wps;
78}
79#endif /* CONFIG_WPS */
80
e76baaac 81
2c09af30
JM		 82/**
83 * wpa_supplicant_enabled_networks - Check whether there are enabled networks
84 * @wpa_s: Pointer to wpa_supplicant data
85 * Returns: 0 if no networks are enabled, >0 if networks are enabled
86 *
87 * This function is used to figure out whether any networks (or Interworking
88 * with enabled credentials and auto_interworking) are present in the current
89 * configuration.
90 */
349493bd 91int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
e76baaac 92{
349493bd 93 struct wpa_ssid *ssid = wpa_s->conf->ssid;
d4534bde 94 int count = 0, disabled = 0;
44b9ea5b
JM		 95
96 if (wpa_s->p2p_mgmt)
97 return 0; /* no normal network profiles on p2p_mgmt interface */
98
e76baaac 99 while (ssid) {
349493bd 100 if (!wpas_network_disabled(wpa_s, ssid))
5471c343 101 count++;
d4534bde
JM		 102 else
103 disabled++;
e76baaac
JM		 104 ssid = ssid->next;
105 }
4d5bda5f
JM		 106 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
107 wpa_s->conf->auto_interworking)
108 count++;
d4534bde
JM		 109 if (count == 0 && disabled > 0) {
110 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
111 "networks)", disabled);
112 }
5471c343 113 return count;
e76baaac
JM		 114}
115
116
117static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
118 struct wpa_ssid *ssid)
119{
3d5f0e91
ST		 120 int min_temp_disabled = 0;
121
e76baaac 122 while (ssid) {
3d5f0e91
ST		 123 if (!wpas_network_disabled(wpa_s, ssid)) {
124 int temp_disabled = wpas_temp_disabled(wpa_s, ssid);
125
126 if (temp_disabled <= 0)
127 break;
128
129 if (!min_temp_disabled ||
130 temp_disabled < min_temp_disabled)
131 min_temp_disabled = temp_disabled;
132 }
e76baaac
JM		 133 ssid = ssid->next;
134 }
135
136 /* ap_scan=2 mode - try to associate with each SSID. */
137 if (ssid == NULL) {
f049052b
BG		 138 wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
139 "end of scan list - go back to beginning");
ba2a573c 140 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
3d5f0e91 141 wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0);
e76baaac
JM		 142 return;
143 }
144 if (ssid->next) {
145 /* Continue from the next SSID on the next attempt. */
146 wpa_s->prev_scan_ssid = ssid;
147 } else {
148 /* Start from the beginning of the SSID list. */
ba2a573c 149 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
e76baaac
JM		 150 }
151 wpa_supplicant_associate(wpa_s, NULL, ssid);
152}
153
154
d12a51b5 155static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
60b94c98 156{
d12a51b5
JM		 157 struct wpa_supplicant *wpa_s = work->wpa_s;
158 struct wpa_driver_scan_params *params = work->ctx;
60b94c98
JM		 159 int ret;
160
d12a51b5 161 if (deinit) {
b3253ebb
AO		 162 if (!work->started) {
163 wpa_scan_free_params(params);
164 return;
165 }
166 wpa_supplicant_notify_scanning(wpa_s, 0);
167 wpas_notify_scan_done(wpa_s, 0);
168 wpa_s->scan_work = NULL;
d12a51b5
JM		 169 return;
170 }
171
c267753b
JM		 172 if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
173 wpa_msg(wpa_s, MSG_INFO,
174 "Failed to assign random MAC address for a scan");
6dc3206e
JM		 175 wpa_scan_free_params(params);
176 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
c267753b
JM		 177 radio_work_done(work);
178 return;
179 }
180
60b94c98
JM		 181 wpa_supplicant_notify_scanning(wpa_s, 1);
182
2dbe63ad
JM		 183 if (wpa_s->clear_driver_scan_cache) {
184 wpa_printf(MSG_DEBUG,
185 "Request driver to clear scan cache due to local BSS flush");
949938aa 186 params->only_new_results = 1;
2dbe63ad 187 }
17fbb751 188 ret = wpa_drv_scan(wpa_s, params);
bf88401d
SD		 189 /*
190 * Store the obtained vendor scan cookie (if any) in wpa_s context.
191 * The current design is to allow only one scan request on each
192 * interface, hence having this scan cookie stored in wpa_s context is
193 * fine for now.
194 *
195 * Revisit this logic if concurrent scan operations per interface
196 * is supported.
197 */
198 if (ret == 0)
199 wpa_s->curr_scan_cookie = params->scan_cookie;
d12a51b5
JM		 200 wpa_scan_free_params(params);
201 work->ctx = NULL;
60b94c98 202 if (ret) {
3756acfd
AS		 203 int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
204 !wpa_s->beacon_rep_data.token;
2d9c99e3
JM		 205
206 if (wpa_s->disconnected)
207 retry = 0;
208
60b94c98
JM		 209 wpa_supplicant_notify_scanning(wpa_s, 0);
210 wpas_notify_scan_done(wpa_s, 0);
2d9c99e3
JM		 211 if (wpa_s->wpa_state == WPA_SCANNING)
212 wpa_supplicant_set_state(wpa_s,
213 wpa_s->scan_prev_wpa_state);
214 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s",
215 ret, retry ? " retry=1" : "");
d12a51b5 216 radio_work_done(work);
2d9c99e3
JM		 217
218 if (retry) {
219 /* Restore scan_req since we will try to scan again */
220 wpa_s->scan_req = wpa_s->last_scan_req;
221 wpa_supplicant_req_scan(wpa_s, 1, 0);
57d3c591
HW		 222 } else if (wpa_s->scan_res_handler) {
223 /* Clear the scan_res_handler */
224 wpa_s->scan_res_handler = NULL;
2d9c99e3 225 }
3756acfd
AS		 226
227 if (wpa_s->beacon_rep_data.token)
228 wpas_rrm_refuse_request(wpa_s);
229
d12a51b5 230 return;
0b7a25c0 231 }
60b94c98 232
d12a51b5
JM		 233 os_get_reltime(&wpa_s->scan_trigger_time);
234 wpa_s->scan_runs++;
235 wpa_s->normal_scans++;
236 wpa_s->own_scan_requested = 1;
237 wpa_s->clear_driver_scan_cache = 0;
238 wpa_s->scan_work = work;
239}
240
241
242/**
243 * wpa_supplicant_trigger_scan - Request driver to start a scan
244 * @wpa_s: Pointer to wpa_supplicant data
245 * @params: Scan parameters
246 * Returns: 0 on success, -1 on failure
247 */
248int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
249 struct wpa_driver_scan_params *params)
250{
251 struct wpa_driver_scan_params *ctx;
252
253 if (wpa_s->scan_work) {
254 wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
255 return -1;
256 }
257
258 ctx = wpa_scan_clone_params(params);
f37d8a4d
JM		 259 if (!ctx ||
260 radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
d12a51b5
JM		 261 {
262 wpa_scan_free_params(ctx);
6dc3206e 263 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
d12a51b5
JM		 264 return -1;
265 }
266
267 return 0;
60b94c98
JM		 268}
269
270
6a90053c
LC		 271static void
272wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
273{
274 struct wpa_supplicant *wpa_s = eloop_ctx;
275
276 wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");
277
278 if (wpa_supplicant_req_sched_scan(wpa_s))
279 wpa_supplicant_req_scan(wpa_s, 0, 0);
280}
281
282
cbdf3507
LC		 283static void
284wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
285{
286 struct wpa_supplicant *wpa_s = eloop_ctx;
287
288 wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");
289
290 wpa_s->sched_scan_timed_out = 1;
291 wpa_supplicant_cancel_sched_scan(wpa_s);
292}
293
294
0f346657
JM		 295static int
296wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
297 struct wpa_driver_scan_params *params)
cbdf3507
LC		 298{
299 int ret;
300
cbdf3507 301 wpa_supplicant_notify_scanning(wpa_s, 1);
09ea4309 302 ret = wpa_drv_sched_scan(wpa_s, params);
cbdf3507
LC		 303 if (ret)
304 wpa_supplicant_notify_scanning(wpa_s, 0);
305 else
306 wpa_s->sched_scanning = 1;
307
308 return ret;
309}
310
311
0f346657 312static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
cbdf3507
LC		 313{
314 int ret;
315
316 ret = wpa_drv_stop_sched_scan(wpa_s);
317 if (ret) {
318 wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!");
319 /* TODO: what to do if stopping fails? */
320 return -1;
321 }
322
323 return ret;
324}
325
326
3812464c
JM		 327static struct wpa_driver_scan_filter *
328wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids)
329{
330 struct wpa_driver_scan_filter *ssids;
331 struct wpa_ssid *ssid;
332 size_t count;
333
334 *num_ssids = 0;
335 if (!conf->filter_ssids)
336 return NULL;
337
338 for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) {
339 if (ssid->ssid && ssid->ssid_len)
340 count++;
341 }
342 if (count == 0)
343 return NULL;
faebdeaa 344 ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter));
3812464c
JM		 345 if (ssids == NULL)
346 return NULL;
347
348 for (ssid = conf->ssid; ssid; ssid = ssid->next) {
349 if (!ssid->ssid || !ssid->ssid_len)
350 continue;
351 os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len);
352 ssids[*num_ssids].ssid_len = ssid->ssid_len;
353 (*num_ssids)++;
354 }
355
356 return ssids;
357}
358
359
5f738a21
LC		 360static void wpa_supplicant_optimize_freqs(
361 struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params)
362{
363#ifdef CONFIG_P2P
364 if (params->freqs == NULL && wpa_s->p2p_in_provisioning &&
365 wpa_s->go_params) {
366 /* Optimize provisioning state scan based on GO information */
367 if (wpa_s->p2p_in_provisioning < 5 &&
368 wpa_s->go_params->freq > 0) {
369 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
370 "preferred frequency %d MHz",
371 wpa_s->go_params->freq);
faebdeaa 372 params->freqs = os_calloc(2, sizeof(int));
5f738a21
LC		 373 if (params->freqs)
374 params->freqs[0] = wpa_s->go_params->freq;
375 } else if (wpa_s->p2p_in_provisioning < 8 &&
376 wpa_s->go_params->freq_list[0]) {
377 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
378 "channels");
379 int_array_concat(&params->freqs,
380 wpa_s->go_params->freq_list);
381 if (params->freqs)
382 int_array_sort_unique(params->freqs);
383 }
384 wpa_s->p2p_in_provisioning++;
385 }
41d5ce9e
RR		 386
387 if (params->freqs == NULL && wpa_s->p2p_in_invitation) {
388 /*
389 * Optimize scan based on GO information during persistent
390 * group reinvocation
391 */
28fa4eb2 392 if (wpa_s->p2p_in_invitation < 5 &&
41d5ce9e
RR		 393 wpa_s->p2p_invite_go_freq > 0) {
394 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation",
395 wpa_s->p2p_invite_go_freq);
faebdeaa 396 params->freqs = os_calloc(2, sizeof(int));
41d5ce9e
RR		 397 if (params->freqs)
398 params->freqs[0] = wpa_s->p2p_invite_go_freq;
399 }
400 wpa_s->p2p_in_invitation++;
401 if (wpa_s->p2p_in_invitation > 20) {
402 /*
403 * This should not really happen since the variable is
404 * cleared on group removal, but if it does happen, make
405 * sure we do not get stuck in special invitation scan
406 * mode.
407 */
408 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation");
409 wpa_s->p2p_in_invitation = 0;
410 }
411 }
5f738a21
LC		 412#endif /* CONFIG_P2P */
413
414#ifdef CONFIG_WPS
415 if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
416 /*
417 * Optimize post-provisioning scan based on channel used
418 * during provisioning.
419 */
420 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
421 "that was used during provisioning", wpa_s->wps_freq);
faebdeaa 422 params->freqs = os_calloc(2, sizeof(int));
5f738a21
LC		 423 if (params->freqs)
424 params->freqs[0] = wpa_s->wps_freq;
425 wpa_s->after_wps--;
662b40b1
JM		 426 } else if (wpa_s->after_wps)
427 wpa_s->after_wps--;
5f738a21 428
1e7fb4f1
JM		 429 if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
430 {
431 /* Optimize provisioning scan based on already known channel */
432 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",
433 wpa_s->wps_freq);
faebdeaa 434 params->freqs = os_calloc(2, sizeof(int));
1e7fb4f1
JM		 435 if (params->freqs)
436 params->freqs[0] = wpa_s->wps_freq;
437 wpa_s->known_wps_freq = 0; /* only do this once */
438 }
5f738a21
LC		 439#endif /* CONFIG_WPS */
440}
441
442
46ee0427
JM		 443#ifdef CONFIG_INTERWORKING
444static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
445 struct wpabuf *buf)
446{
46ee0427
JM		 447 wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
448 wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
449 1 + ETH_ALEN);
11540c0b 450 wpabuf_put_u8(buf, wpa_s->conf->access_network_type);
46ee0427
JM		 451 /* No Venue Info */
452 if (!is_zero_ether_addr(wpa_s->conf->hessid))
453 wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN);
454}
455#endif /* CONFIG_INTERWORKING */
456
457
2ac43334
RZ		 458#ifdef CONFIG_MBO
459static void wpas_fils_req_param_add_max_channel(struct wpa_supplicant *wpa_s,
460 struct wpabuf **ie)
461{
462 if (wpabuf_resize(ie, 5)) {
463 wpa_printf(MSG_DEBUG,
464 "Failed to allocate space for FILS Request Parameters element");
465 return;
466 }
467
468 /* FILS Request Parameters element */
469 wpabuf_put_u8(*ie, WLAN_EID_EXTENSION);
470 wpabuf_put_u8(*ie, 3); /* FILS Request attribute length */
471 wpabuf_put_u8(*ie, WLAN_EID_EXT_FILS_REQ_PARAMS);
472 /* Parameter control bitmap */
473 wpabuf_put_u8(*ie, 0);
474 /* Max Channel Time field - contains the value of MaxChannelTime
475 * parameter of the MLME-SCAN.request primitive represented in units of
476 * TUs, as an unsigned integer. A Max Channel Time field value of 255
477 * is used to indicate any duration of more than 254 TUs, or an
478 * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178)
479 */
480 wpabuf_put_u8(*ie, 255);
481}
482#endif /* CONFIG_MBO */
483
484
cc9985d1 485void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s)
486{
487 struct wpabuf *default_ies = NULL;
488 u8 ext_capab[18];
489 int ext_capab_len;
490 enum wpa_driver_if_type type = WPA_IF_STATION;
491
492#ifdef CONFIG_P2P
493 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
494 type = WPA_IF_P2P_CLIENT;
495#endif /* CONFIG_P2P */
496
497 wpa_drv_get_ext_capa(wpa_s, type);
498
499 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
500 sizeof(ext_capab));
501 if (ext_capab_len > 0 &&
502 wpabuf_resize(&default_ies, ext_capab_len) == 0)
503 wpabuf_put_data(default_ies, ext_capab, ext_capab_len);
504
505#ifdef CONFIG_MBO
2ac43334
RZ		 506 if (wpa_s->enable_oce & OCE_STA)
507 wpas_fils_req_param_add_max_channel(wpa_s, &default_ies);
332aadb8
AP		 508 /* Send MBO and OCE capabilities */
509 if (wpabuf_resize(&default_ies, 12) == 0)
cc9985d1 510 wpas_mbo_scan_ie(wpa_s, default_ies);
511#endif /* CONFIG_MBO */
512
513 if (default_ies)
514 wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies),
515 wpabuf_len(default_ies));
516 wpabuf_free(default_ies);
517}
518
519
a13e07ec 520static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
6fc6879b 521{
46ee0427 522 struct wpabuf *extra_ie = NULL;
ad443097
IP		 523 u8 ext_capab[18];
524 int ext_capab_len;
b01c18a8 525#ifdef CONFIG_WPS
509a3972 526 int wps = 0;
f90c86d4 527 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
46ee0427
JM		 528#endif /* CONFIG_WPS */
529
cc9a2575
KV		 530#ifdef CONFIG_P2P
531 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
532 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
533 else
534#endif /* CONFIG_P2P */
535 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
536
ad443097
IP		 537 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
538 sizeof(ext_capab));
539 if (ext_capab_len > 0 &&
540 wpabuf_resize(&extra_ie, ext_capab_len) == 0)
541 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
542
46ee0427
JM		 543#ifdef CONFIG_INTERWORKING
544 if (wpa_s->conf->interworking &&
545 wpabuf_resize(&extra_ie, 100) == 0)
546 wpas_add_interworking_elements(wpa_s, extra_ie);
547#endif /* CONFIG_INTERWORKING */
5f738a21 548
2ac43334
RZ		 549#ifdef CONFIG_MBO
550 if (wpa_s->enable_oce & OCE_STA)
551 wpas_fils_req_param_add_max_channel(wpa_s, &extra_ie);
552#endif /* CONFIG_MBO */
553
46ee0427 554#ifdef CONFIG_WPS
5f738a21
LC		 555 wps = wpas_wps_in_use(wpa_s, &req_type);
556
557 if (wps) {
46ee0427 558 struct wpabuf *wps_ie;
360182ed
JM		 559 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
560 DEV_PW_DEFAULT,
561 &wpa_s->wps->dev,
5f738a21
LC		 562 wpa_s->wps->uuid, req_type,
563 0, NULL);
564 if (wps_ie) {
46ee0427
JM		 565 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
566 wpabuf_put_buf(extra_ie, wps_ie);
567 wpabuf_free(wps_ie);
5f738a21
LC		 568 }
569 }
570
571#ifdef CONFIG_P2P
46ee0427 572 if (wps) {
5f738a21 573 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
46ee0427
JM		 574 if (wpabuf_resize(&extra_ie, ielen) == 0)
575 wpas_p2p_scan_ie(wpa_s, extra_ie);
5f738a21
LC		 576 }
577#endif /* CONFIG_P2P */
578
fbca4c89
JA		 579 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
580
b01c18a8 581#endif /* CONFIG_WPS */
5f738a21 582
0f105f9e
JM		 583#ifdef CONFIG_HS20
584 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0)
ec2cf403 585 wpas_hs20_add_indication(extra_ie, -1, 0);
0f105f9e
JM		 586#endif /* CONFIG_HS20 */
587
b36a3a65
AN		 588#ifdef CONFIG_FST
589 if (wpa_s->fst_ies &&
590 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
591 wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
592#endif /* CONFIG_FST */
593
c5d193d7 594#ifdef CONFIG_MBO
332aadb8
AP		 595 /* Send MBO and OCE capabilities */
596 if (wpabuf_resize(&extra_ie, 12) == 0)
c5d193d7
DS		 597 wpas_mbo_scan_ie(wpa_s, extra_ie);
598#endif /* CONFIG_MBO */
599
61c10118
JM		 600 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
601 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
602
603 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
604 wpabuf_put_buf(extra_ie, buf);
605 }
606
46ee0427 607 return extra_ie;
5f738a21
LC		 608}
609
610
5cc70322
JM		 611#ifdef CONFIG_P2P
612
613/*
614 * Check whether there are any enabled networks or credentials that could be
615 * used for a non-P2P connection.
616 */
617static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
618{
619 struct wpa_ssid *ssid;
620
621 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
622 if (wpas_network_disabled(wpa_s, ssid))
623 continue;
624 if (!ssid->p2p_group)
625 return 1;
626 }
627
628 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
629 wpa_s->conf->auto_interworking)
630 return 1;
631
632 return 0;
633}
634
6124e858 635#endif /* CONFIG_P2P */
5cc70322 636
5cc70322 637
faf9a858
JM		 638static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
639 enum hostapd_hw_mode band,
640 struct wpa_driver_scan_params *params)
641{
642 /* Include only supported channels for the specified band */
643 struct hostapd_hw_modes *mode;
644 int count, i;
645
646 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
647 if (mode == NULL) {
648 /* No channels supported in this band - use empty list */
649 params->freqs = os_zalloc(sizeof(int));
650 return;
651 }
652
faebdeaa 653 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
faf9a858
JM		 654 if (params->freqs == NULL)
655 return;
656 for (count = 0, i = 0; i < mode->num_channels; i++) {
657 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
658 continue;
659 params->freqs[count++] = mode->channels[i].freq;
660 }
661}
662
663
664static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
665 struct wpa_driver_scan_params *params)
666{
667 if (wpa_s->hw.modes == NULL)
668 return; /* unknown what channels the driver supports */
669 if (params->freqs)
670 return; /* already using a limited channel set */
671 if (wpa_s->setband == WPA_SETBAND_5G)
672 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A,
673 params);
674 else if (wpa_s->setband == WPA_SETBAND_2G)
675 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G,
676 params);
677}
678
679
c04562e6
IP		 680static void wpa_add_scan_ssid(struct wpa_supplicant *wpa_s,
681 struct wpa_driver_scan_params *params,
682 size_t max_ssids, const u8 *ssid, size_t ssid_len)
683{
684 unsigned int j;
685
686 for (j = 0; j < params->num_ssids; j++) {
687 if (params->ssids[j].ssid_len == ssid_len &&
688 params->ssids[j].ssid &&
689 os_memcmp(params->ssids[j].ssid, ssid, ssid_len) == 0)
690 return; /* already in the list */
691 }
692
693 if (params->num_ssids + 1 > max_ssids) {
694 wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request");
695 return;
696 }
697
698 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
699 wpa_ssid_txt(ssid, ssid_len));
700
701 params->ssids[params->num_ssids].ssid = ssid;
702 params->ssids[params->num_ssids].ssid_len = ssid_len;
703 params->num_ssids++;
704}
705
706
707static void wpa_add_owe_scan_ssid(struct wpa_supplicant *wpa_s,
708 struct wpa_driver_scan_params *params,
709 struct wpa_ssid *ssid, size_t max_ssids)
710{
711#ifdef CONFIG_OWE
712 struct wpa_bss *bss;
713
714 if (!(ssid->key_mgmt & WPA_KEY_MGMT_OWE))
715 return;
716
717 wpa_printf(MSG_DEBUG, "OWE: Look for transition mode AP. ssid=%s",
718 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
719
720 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
721 const u8 *owe, *pos, *end;
722 const u8 *owe_ssid;
723 size_t owe_ssid_len;
724
725 if (bss->ssid_len != ssid->ssid_len ||
726 os_memcmp(bss->ssid, ssid->ssid, ssid->ssid_len) != 0)
727 continue;
728
729 owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE);
730 if (!owe || owe[1] < 4)
731 continue;
732
733 pos = owe + 6;
734 end = owe + 2 + owe[1];
735
736 /* Must include BSSID and ssid_len */
737 if (end - pos < ETH_ALEN + 1)
738 return;
739
740 /* Skip BSSID */
741 pos += ETH_ALEN;
742 owe_ssid_len = *pos++;
743 owe_ssid = pos;
744
745 if ((size_t) (end - pos) < owe_ssid_len ||
746 owe_ssid_len > SSID_MAX_LEN)
747 return;
748
749 wpa_printf(MSG_DEBUG,
750 "OWE: scan_ssids: transition mode OWE ssid=%s",
751 wpa_ssid_txt(owe_ssid, owe_ssid_len));
752
753 wpa_add_scan_ssid(wpa_s, params, max_ssids,
754 owe_ssid, owe_ssid_len);
755 return;
756 }
757#endif /* CONFIG_OWE */
758}
759
760
6891f0e6
LJ		 761static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
762 struct wpa_driver_scan_params *params,
763 size_t max_ssids)
764{
765 unsigned int i;
766 struct wpa_ssid *ssid;
767
ef60f643
RP		 768 /*
769 * For devices with max_ssids greater than 1, leave the last slot empty
770 * for adding the wildcard scan entry.
771 */
772 max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids;
773
6891f0e6 774 for (i = 0; i < wpa_s->scan_id_count; i++) {
6891f0e6 775 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
c04562e6 776 if (!ssid)
6891f0e6 777 continue;
c04562e6
IP		 778 if (ssid->scan_ssid)
779 wpa_add_scan_ssid(wpa_s, params, max_ssids,
780 ssid->ssid, ssid->ssid_len);
781 /*
782 * Also add the SSID of the OWE BSS, to allow discovery of
783 * transition mode APs more quickly.
784 */
785 wpa_add_owe_scan_ssid(wpa_s, params, ssid, max_ssids);
6891f0e6
LJ		 786 }
787
788 wpa_s->scan_id_count = 0;
789}
790
791
a80651d0
KV		 792static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
793 struct wpa_driver_scan_params *params,
794 size_t max_ssids)
795{
796 unsigned int i;
797
798 if (wpa_s->ssids_from_scan_req == NULL ||
799 wpa_s->num_ssids_from_scan_req == 0)
800 return 0;
801
802 if (wpa_s->num_ssids_from_scan_req > max_ssids) {
803 wpa_s->num_ssids_from_scan_req = max_ssids;
804 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
805 (unsigned int) max_ssids);
806 }
807
808 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
809 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
810 params->ssids[i].ssid_len =
811 wpa_s->ssids_from_scan_req[i].ssid_len;
812 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
813 params->ssids[i].ssid,
814 params->ssids[i].ssid_len);
815 }
816
817 params->num_ssids = wpa_s->num_ssids_from_scan_req;
818 wpa_s->num_ssids_from_scan_req = 0;
819 return 1;
820}
821
822
5f738a21
LC		 823static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
824{
825 struct wpa_supplicant *wpa_s = eloop_ctx;
826 struct wpa_ssid *ssid;
49e3eea8 827 int ret, p2p_in_prog;
b9b12d02 828 struct wpabuf *extra_ie = NULL;
e76baaac 829 struct wpa_driver_scan_params params;
7c865c68 830 struct wpa_driver_scan_params *scan_params;
e76baaac 831 size_t max_ssids;
3f9ebc43 832 int connect_without_scan = 0;
6fc6879b 833
6e374bd4
JM		 834 wpa_s->ignore_post_flush_scan_res = 0;
835
8401a6b0 836 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
f049052b 837 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
8401a6b0
JM		 838 return;
839 }
840
4115303b 841 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
ac06fb12 842 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
3180d7a2 843 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
6fc6879b 844 return;
3180d7a2 845 }
6fc6879b 846
f86d282f
JJ		 847 if (wpa_s->scanning) {
848 /*
849 * If we are already in scanning state, we shall reschedule the
850 * the incoming scan request.
851 */
852 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
853 wpa_supplicant_req_scan(wpa_s, 1, 0);
854 return;
855 }
856
349493bd 857 if (!wpa_supplicant_enabled_networks(wpa_s) &&
4115303b 858 wpa_s->scan_req == NORMAL_SCAN_REQ) {
f049052b 859 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
6fc6879b
JM		 860 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
861 return;
862 }
6fc6879b 863
c2a04078
JM		 864 if (wpa_s->conf->ap_scan != 0 &&
865 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
f049052b
BG		 866 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
867 "overriding ap_scan configuration");
6fc6879b 868 wpa_s->conf->ap_scan = 0;
8bac466b 869 wpas_notify_ap_scan_changed(wpa_s);
6fc6879b
JM		 870 }
871
872 if (wpa_s->conf->ap_scan == 0) {
873 wpa_supplicant_gen_assoc_event(wpa_s);
874 return;
875 }
876
3f9ebc43 877 ssid = NULL;
a51c40aa 878 if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
3f9ebc43
JM		 879 wpa_s->connect_without_scan) {
880 connect_without_scan = 1;
881 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
882 if (ssid == wpa_s->connect_without_scan)
883 break;
884 }
885 }
886
49e3eea8 887 p2p_in_prog = wpas_p2p_in_progress(wpa_s);
3f9ebc43
JM		 888 if (p2p_in_prog && p2p_in_prog != 2 &&
889 (!ssid ||
890 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
1b5d4714
JM		 891 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
892 wpa_supplicant_req_scan(wpa_s, 5, 0);
893 return;
303f60d3 894 }
303f60d3 895
57f93d68
AN		 896 /*
897 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are
898 * used for changing modes inside wpa_supplicant (roaming,
899 * auto-reconnect, etc). Discarding the scan might hurt these processes.
900 * The normal use case for PNO is to suspend the host immediately after
901 * starting PNO, so the periodic 100 ms attempts to run the scan do not
902 * normally happen in practice multiple times, i.e., this is simply
903 * restarting scanning once the host is woken up and PNO stopped.
904 */
905 if (wpa_s->pno || wpa_s->pno_sched_pending) {
906 wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress");
907 wpa_supplicant_req_scan(wpa_s, 0, 100000);
908 return;
909 }
910
17fbb751 911 if (wpa_s->conf->ap_scan == 2)
e76baaac
JM		 912 max_ssids = 1;
913 else {
914 max_ssids = wpa_s->max_scan_ssids;
915 if (max_ssids > WPAS_MAX_SCAN_SSIDS)
916 max_ssids = WPAS_MAX_SCAN_SSIDS;
917 }
918
12455031 919 wpa_s->last_scan_req = wpa_s->scan_req;
4115303b 920 wpa_s->scan_req = NORMAL_SCAN_REQ;
e76baaac 921
3f9ebc43
JM		 922 if (connect_without_scan) {
923 wpa_s->connect_without_scan = NULL;
924 if (ssid) {
925 wpa_printf(MSG_DEBUG, "Start a pre-selected network "
926 "without scan step");
927 wpa_supplicant_associate(wpa_s, NULL, ssid);
928 return;
929 }
930 }
931
e76baaac
JM		 932 os_memset(&params, 0, sizeof(params));
933
2d9c99e3 934 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
6fc6879b
JM		 935 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
936 wpa_s->wpa_state == WPA_INACTIVE)
937 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
938
7c865c68
TB		 939 /*
940 * If autoscan has set its own scanning parameters
941 */
942 if (wpa_s->autoscan_params != NULL) {
943 scan_params = wpa_s->autoscan_params;
944 goto scan;
945 }
946
a80651d0
KV		 947 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
948 wpa_set_ssids_from_scan_req(wpa_s, &params, max_ssids)) {
949 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
950 goto ssid_list_set;
951 }
952
a21c05db 953#ifdef CONFIG_P2P
85ea132a 954 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
c35e35ed 955 wpa_s->go_params && !wpa_s->conf->passive_scan) {
9100b660
JM		 956 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
957 wpa_s->p2p_in_provisioning,
958 wpa_s->show_group_started);
a21c05db
JM		 959 params.ssids[0].ssid = wpa_s->go_params->ssid;
960 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
961 params.num_ssids = 1;
962 goto ssid_list_set;
963 }
41d5ce9e
RR		 964
965 if (wpa_s->p2p_in_invitation) {
966 if (wpa_s->current_ssid) {
967 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
968 params.ssids[0].ssid = wpa_s->current_ssid->ssid;
969 params.ssids[0].ssid_len =
970 wpa_s->current_ssid->ssid_len;
971 params.num_ssids = 1;
972 } else {
973 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
974 }
975 goto ssid_list_set;
976 }
a21c05db
JM		 977#endif /* CONFIG_P2P */
978
e76baaac 979 /* Find the starting point from which to continue scanning */
6fc6879b 980 ssid = wpa_s->conf->ssid;
ba2a573c 981 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
6fc6879b
JM		 982 while (ssid) {
983 if (ssid == wpa_s->prev_scan_ssid) {
984 ssid = ssid->next;
985 break;
986 }
987 ssid = ssid->next;
988 }
989 }
6fc6879b 990
12455031 991 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
0a34b62b
JM		 992#ifdef CONFIG_AP
993 !wpa_s->ap_iface &&
994#endif /* CONFIG_AP */
12455031 995 wpa_s->conf->ap_scan == 2) {
7dcdcfd6 996 wpa_s->connect_without_scan = NULL;
b3aa456b 997 wpa_s->prev_scan_wildcard = 0;
e76baaac
JM		 998 wpa_supplicant_assoc_try(wpa_s, ssid);
999 return;
1000 } else if (wpa_s->conf->ap_scan == 2) {
6fc6879b 1001 /*
ba2a573c
JM		 1002 * User-initiated scan request in ap_scan == 2; scan with
1003 * wildcard SSID.
6fc6879b 1004 */
e76baaac 1005 ssid = NULL;
0f44ec8e
PQ		 1006 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
1007 /*
1008 * Perform single-channel single-SSID scan for
1009 * reassociate-to-same-BSS operation.
1010 */
1011 /* Setup SSID */
1012 ssid = wpa_s->current_ssid;
1013 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1014 ssid->ssid, ssid->ssid_len);
1015 params.ssids[0].ssid = ssid->ssid;
1016 params.ssids[0].ssid_len = ssid->ssid_len;
1017 params.num_ssids = 1;
1018
1019 /*
1020 * Allocate memory for frequency array, allocate one extra
1021 * slot for the zero-terminator.
1022 */
1023 params.freqs = os_malloc(sizeof(int) * 2);
8e909fa9
JM		 1024 if (params.freqs) {
1025 params.freqs[0] = wpa_s->assoc_freq;
1026 params.freqs[1] = 0;
0f44ec8e 1027 }
0f44ec8e
PQ		 1028
1029 /*
1030 * Reset the reattach flag so that we fall back to full scan if
1031 * this scan fails.
1032 */
1033 wpa_s->reattach = 0;
e76baaac 1034 } else {
5be45e2e 1035 struct wpa_ssid *start = ssid, *tssid;
d3a98225 1036 int freqs_set = 0;
e76baaac
JM		 1037 if (ssid == NULL && max_ssids > 1)
1038 ssid = wpa_s->conf->ssid;
1039 while (ssid) {
349493bd
JM		 1040 if (!wpas_network_disabled(wpa_s, ssid) &&
1041 ssid->scan_ssid) {
e76baaac
JM		 1042 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1043 ssid->ssid, ssid->ssid_len);
1044 params.ssids[params.num_ssids].ssid =
1045 ssid->ssid;
1046 params.ssids[params.num_ssids].ssid_len =
1047 ssid->ssid_len;
1048 params.num_ssids++;
1049 if (params.num_ssids + 1 >= max_ssids)
1050 break;
1051 }
c04562e6
IP		 1052
1053 if (!wpas_network_disabled(wpa_s, ssid)) {
1054 /*
1055 * Also add the SSID of the OWE BSS, to allow
1056 * discovery of transition mode APs more
1057 * quickly.
1058 */
1059 wpa_add_owe_scan_ssid(wpa_s, &params, ssid,
1060 max_ssids);
1061 }
1062
e76baaac
JM		 1063 ssid = ssid->next;
1064 if (ssid == start)
1065 break;
1066 if (ssid == NULL && max_ssids > 1 &&
1067 start != wpa_s->conf->ssid)
1068 ssid = wpa_s->conf->ssid;
6fc6879b 1069 }
d3a98225 1070
6891f0e6
LJ		 1071 if (wpa_s->scan_id_count &&
1072 wpa_s->last_scan_req == MANUAL_SCAN_REQ)
1073 wpa_set_scan_ssids(wpa_s, &params, max_ssids);
1074
0855e2e1
JM		 1075 for (tssid = wpa_s->conf->ssid;
1076 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
1077 tssid = tssid->next) {
349493bd 1078 if (wpas_network_disabled(wpa_s, tssid))
d3a98225 1079 continue;
5be45e2e 1080 if ((params.freqs || !freqs_set) && tssid->scan_freq) {
d3a98225 1081 int_array_concat(&params.freqs,
5be45e2e 1082 tssid->scan_freq);
d3a98225
JM		 1083 } else {
1084 os_free(params.freqs);
1085 params.freqs = NULL;
1086 }
1087 freqs_set = 1;
1088 }
1089 int_array_sort_unique(params.freqs);
6fc6879b
JM		 1090 }
1091
b3aa456b
ES		 1092 if (ssid && max_ssids == 1) {
1093 /*
1094 * If the driver is limited to 1 SSID at a time interleave
1095 * wildcard SSID scans with specific SSID scans to avoid
1096 * waiting a long time for a wildcard scan.
1097 */
1098 if (!wpa_s->prev_scan_wildcard) {
1099 params.ssids[0].ssid = NULL;
1100 params.ssids[0].ssid_len = 0;
1101 wpa_s->prev_scan_wildcard = 1;
1102 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
1103 "wildcard SSID (Interleave with specific)");
1104 } else {
1105 wpa_s->prev_scan_ssid = ssid;
1106 wpa_s->prev_scan_wildcard = 0;
1107 wpa_dbg(wpa_s, MSG_DEBUG,
1108 "Starting AP scan for specific SSID: %s",
1109 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
e76baaac 1110 }
b3aa456b
ES		 1111 } else if (ssid) {
1112 /* max_ssids > 1 */
1113
1114 wpa_s->prev_scan_ssid = ssid;
1115 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
1116 "the scan request");
1117 params.num_ssids++;
88c2d488
JM		 1118 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1119 wpa_s->manual_scan_passive && params.num_ssids == 0) {
1120 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
c35e35ed
JM		 1121 } else if (wpa_s->conf->passive_scan) {
1122 wpa_dbg(wpa_s, MSG_DEBUG,
1123 "Use passive scan based on configuration");
e76baaac 1124 } else {
ba2a573c 1125 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
e76baaac 1126 params.num_ssids++;
f049052b
BG		 1127 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
1128 "SSID");
6fc6879b
JM		 1129 }
1130
a80651d0 1131ssid_list_set:
5f738a21 1132 wpa_supplicant_optimize_freqs(wpa_s, &params);
a13e07ec 1133 extra_ie = wpa_supplicant_extra_ies(wpa_s);
0e65037c 1134
949938aa 1135 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2dbe63ad
JM		 1136 wpa_s->manual_scan_only_new) {
1137 wpa_printf(MSG_DEBUG,
1138 "Request driver to clear scan cache due to manual only_new=1 scan");
949938aa 1139 params.only_new_results = 1;
2dbe63ad 1140 }
949938aa 1141
fee52342
JM		 1142 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
1143 wpa_s->manual_scan_freqs) {
1144 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
1145 params.freqs = wpa_s->manual_scan_freqs;
1146 wpa_s->manual_scan_freqs = NULL;
1147 }
1148
88a44755
JM		 1149 if (params.freqs == NULL && wpa_s->select_network_scan_freqs) {
1150 wpa_dbg(wpa_s, MSG_DEBUG,
1151 "Limit select_network scan to specified channels");
1152 params.freqs = wpa_s->select_network_scan_freqs;
1153 wpa_s->select_network_scan_freqs = NULL;
1154 }
1155
f47d639d 1156 if (params.freqs == NULL && wpa_s->next_scan_freqs) {
f049052b
BG		 1157 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
1158 "generated frequency list");
f47d639d
JM		 1159 params.freqs = wpa_s->next_scan_freqs;
1160 } else
1161 os_free(wpa_s->next_scan_freqs);
1162 wpa_s->next_scan_freqs = NULL;
faf9a858 1163 wpa_setband_scan_freqs(wpa_s, &params);
f47d639d 1164
f5ffc348
BG		 1165 /* See if user specified frequencies. If so, scan only those. */
1166 if (wpa_s->conf->freq_list && !params.freqs) {
1167 wpa_dbg(wpa_s, MSG_DEBUG,
1168 "Optimize scan based on conf->freq_list");
1169 int_array_concat(&params.freqs, wpa_s->conf->freq_list);
1170 }
1171
6124e858
BG		 1172 /* Use current associated channel? */
1173 if (wpa_s->conf->scan_cur_freq && !params.freqs) {
53c5dfc2
IP		 1174 unsigned int num = wpa_s->num_multichan_concurrent;
1175
1176 params.freqs = os_calloc(num + 1, sizeof(int));
1177 if (params.freqs) {
1178 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1179 if (num > 0) {
1180 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
1181 "current operating channels since "
1182 "scan_cur_freq is enabled");
1183 } else {
1184 os_free(params.freqs);
1185 params.freqs = NULL;
1186 }
6124e858
BG		 1187 }
1188 }
1189
2ac43334
RZ		 1190#ifdef CONFIG_MBO
1191 if (wpa_s->enable_oce & OCE_STA)
1192 params.oce_scan = 1;
1193#endif /* CONFIG_MBO */
1194
3812464c
JM		 1195 params.filter_ssids = wpa_supplicant_build_filter_ssids(
1196 wpa_s->conf, &params.num_filter_ssids);
46ee0427
JM		 1197 if (extra_ie) {
1198 params.extra_ies = wpabuf_head(extra_ie);
1199 params.extra_ies_len = wpabuf_len(extra_ie);
1200 }
3812464c 1201
d1dd48e3 1202#ifdef CONFIG_P2P
8235f89f 1203 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
85ea132a 1204 (wpa_s->show_group_started && wpa_s->go_params)) {
d1dd48e3
JM		 1205 /*
1206 * The interface may not yet be in P2P mode, so we have to
1207 * explicitly request P2P probe to disable CCK rates.
1208 */
1209 params.p2p_probe = 1;
1210 }
1211#endif /* CONFIG_P2P */
1212
346b333d
SD		 1213 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) &&
1214 wpa_s->wpa_state <= WPA_SCANNING) {
56c76fa5
IP		 1215 params.mac_addr_rand = 1;
1216 if (wpa_s->mac_addr_scan) {
1217 params.mac_addr = wpa_s->mac_addr_scan;
1218 params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN;
1219 }
1220 }
1221
0645492e
JM		 1222 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
1223 struct wpa_bss *bss;
1224
1225 params.bssid = wpa_s->next_scan_bssid;
1226 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
1227 if (bss && bss->ssid_len && params.num_ssids == 1 &&
1228 params.ssids[0].ssid_len == 0) {
1229 params.ssids[0].ssid = bss->ssid;
1230 params.ssids[0].ssid_len = bss->ssid_len;
1231 wpa_dbg(wpa_s, MSG_DEBUG,
1232 "Scan a previously specified BSSID " MACSTR
1233 " and SSID %s",
1234 MAC2STR(params.bssid),
1235 wpa_ssid_txt(bss->ssid, bss->ssid_len));
1236 } else {
1237 wpa_dbg(wpa_s, MSG_DEBUG,
1238 "Scan a previously specified BSSID " MACSTR,
1239 MAC2STR(params.bssid));
1240 }
1241 }
1242
7c865c68
TB		 1243 scan_params = &params;
1244
1245scan:
5cc70322
JM		 1246#ifdef CONFIG_P2P
1247 /*
1248 * If the driver does not support multi-channel concurrency and a
1249 * virtual interface that shares the same radio with the wpa_s interface
1250 * is operating there may not be need to scan other channels apart from
1251 * the current operating channel on the other virtual interface. Filter
1252 * out other channels in case we are trying to find a connection for a
1253 * station interface when we are not configured to prefer station
1254 * connection and a concurrent operation is already in process.
1255 */
12455031
LP		 1256 if (wpa_s->scan_for_connection &&
1257 wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
5cc70322
JM		 1258 !scan_params->freqs && !params.freqs &&
1259 wpas_is_p2p_prioritized(wpa_s) &&
5cc70322
JM		 1260 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
1261 non_p2p_network_enabled(wpa_s)) {
53c5dfc2
IP		 1262 unsigned int num = wpa_s->num_multichan_concurrent;
1263
1264 params.freqs = os_calloc(num + 1, sizeof(int));
1265 if (params.freqs) {
1266 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1267 if (num > 0 && num == wpa_s->num_multichan_concurrent) {
1268 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
1269 } else {
1270 os_free(params.freqs);
1271 params.freqs = NULL;
1272 }
5cc70322
JM		 1273 }
1274 }
1275#endif /* CONFIG_P2P */
1276
7c865c68 1277 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
6fc6879b 1278
fee52342
JM		 1279 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
1280 !wpa_s->manual_scan_freqs) {
1281 /* Restore manual_scan_freqs for the next attempt */
1282 wpa_s->manual_scan_freqs = params.freqs;
1283 params.freqs = NULL;
1284 }
1285
46ee0427 1286 wpabuf_free(extra_ie);
d3a98225 1287 os_free(params.freqs);
3812464c 1288 os_free(params.filter_ssids);
ad08c363 1289
6fc6879b 1290 if (ret) {
f049052b 1291 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
2d9c99e3
JM		 1292 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
1293 wpa_supplicant_set_state(wpa_s,
1294 wpa_s->scan_prev_wpa_state);
23270cd8 1295 /* Restore scan_req since we will try to scan again */
12455031 1296 wpa_s->scan_req = wpa_s->last_scan_req;
1c4c9c50 1297 wpa_supplicant_req_scan(wpa_s, 1, 0);
5cc70322
JM		 1298 } else {
1299 wpa_s->scan_for_connection = 0;
a8826b18
JM		 1300#ifdef CONFIG_INTERWORKING
1301 wpa_s->interworking_fast_assoc_tried = 0;
1302#endif /* CONFIG_INTERWORKING */
0645492e
JM		 1303 if (params.bssid)
1304 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
d902a9c1 1305 }
6fc6879b
JM		 1306}
1307
1308
9e737f08
PF		 1309void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
1310{
594516b4 1311 struct os_reltime remaining, new_int;
9e737f08
PF		 1312 int cancelled;
1313
1314 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
1315 &remaining);
1316
1317 new_int.sec = sec;
1318 new_int.usec = 0;
594516b4 1319 if (cancelled && os_reltime_before(&remaining, &new_int)) {
9e737f08
PF		 1320 new_int.sec = remaining.sec;
1321 new_int.usec = remaining.usec;
1322 }
1323
c6f5dec9
PF		 1324 if (cancelled) {
1325 eloop_register_timeout(new_int.sec, new_int.usec,
1326 wpa_supplicant_scan, wpa_s, NULL);
1327 }
9e737f08
PF		 1328 wpa_s->scan_interval = sec;
1329}
1330
1331
6fc6879b
JM		 1332/**
1333 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1334 * @wpa_s: Pointer to wpa_supplicant data
1335 * @sec: Number of seconds after which to scan
1336 * @usec: Number of microseconds after which to scan
1337 *
1338 * This function is used to schedule a scan for neighboring access points after
1339 * the specified time.
1340 */
1341void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
1342{
44b9ea5b
JM		 1343 int res;
1344
1345 if (wpa_s->p2p_mgmt) {
1346 wpa_dbg(wpa_s, MSG_DEBUG,
1347 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1348 sec, usec);
1349 return;
1350 }
1351
1352 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
1353 NULL);
a09ffd5f
JM		 1354 if (res == 1) {
1355 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
e2f5a988 1356 sec, usec);
a09ffd5f
JM		 1357 } else if (res == 0) {
1358 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1359 sec, usec);
1360 } else {
1361 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
1362 sec, usec);
1363 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
e2f5a988 1364 }
6fc6879b
JM		 1365}
1366
1367
6a90053c
LC		 1368/**
1369 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1370 * @wpa_s: Pointer to wpa_supplicant data
1371 * @sec: Number of seconds after which to scan
1372 * @usec: Number of microseconds after which to scan
2c09af30 1373 * Returns: 0 on success or -1 otherwise
6a90053c
LC		 1374 *
1375 * This function is used to schedule periodic scans for neighboring
1376 * access points after the specified time.
1377 */
1378int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
1379 int sec, int usec)
1380{
1381 if (!wpa_s->sched_scan_supported)
1382 return -1;
1383
1384 eloop_register_timeout(sec, usec,
1385 wpa_supplicant_delayed_sched_scan_timeout,
1386 wpa_s, NULL);
1387
1388 return 0;
1389}
1390
1391
57c3a605 1392static void
1393wpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s,
1394 struct wpa_driver_scan_params *params)
1395{
1396 if (wpa_s->wpa_state != WPA_COMPLETED ||
1397 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) ||
1398 wpa_s->srp.relative_rssi_set == 0)
1399 return;
1400
1401 params->relative_rssi_set = 1;
1402 params->relative_rssi = wpa_s->srp.relative_rssi;
1403
1404 if (wpa_s->srp.relative_adjust_rssi == 0)
1405 return;
1406
1407 params->relative_adjust_band = wpa_s->srp.relative_adjust_band;
1408 params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi;
1409}
1410
1411
cbdf3507
LC		 1412/**
1413 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1414 * @wpa_s: Pointer to wpa_supplicant data
2c09af30 1415 * Returns: 0 is sched_scan was started or -1 otherwise
cbdf3507
LC		 1416 *
1417 * This function is used to schedule periodic scans for neighboring
1418 * access points repeating the scan continuously.
1419 */
1420int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
1421{
1422 struct wpa_driver_scan_params params;
7c865c68 1423 struct wpa_driver_scan_params *scan_params;
cbdf3507 1424 enum wpa_states prev_state;
7c865c68 1425 struct wpa_ssid *ssid = NULL;
a13e07ec 1426 struct wpabuf *extra_ie = NULL;
cbdf3507 1427 int ret;
cbdf3507 1428 unsigned int max_sched_scan_ssids;
76a5249e 1429 int wildcard = 0;
0b7a25c0 1430 int need_ssids;
32c02261 1431 struct sched_scan_plan scan_plan;
cbdf3507
LC		 1432
1433 if (!wpa_s->sched_scan_supported)
1434 return -1;
1435
1436 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
1437 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
1438 else
1439 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
54ddd743 1440 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
76a5249e 1441 return -1;
cbdf3507 1442
14f34a73
AS		 1443 wpa_s->sched_scan_stop_req = 0;
1444
1966e3d1
ES		 1445 if (wpa_s->sched_scanning) {
1446 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
cbdf3507 1447 return 0;
1966e3d1 1448 }
cbdf3507 1449
0b7a25c0
JM		 1450 need_ssids = 0;
1451 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
349493bd 1452 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
0b7a25c0
JM		 1453 /* Use wildcard SSID to find this network */
1454 wildcard = 1;
349493bd
JM		 1455 } else if (!wpas_network_disabled(wpa_s, ssid) &&
1456 ssid->ssid_len)
0b7a25c0 1457 need_ssids++;
aa283ddd
JM		 1458
1459#ifdef CONFIG_WPS
349493bd 1460 if (!wpas_network_disabled(wpa_s, ssid) &&
fea7c3a0 1461 ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
aa283ddd
JM		 1462 /*
1463 * Normal scan is more reliable and faster for WPS
1464 * operations and since these are for short periods of
1465 * time, the benefit of trying to use sched_scan would
1466 * be limited.
1467 */
1468 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1469 "sched_scan for WPS");
1470 return -1;
1471 }
1472#endif /* CONFIG_WPS */
0b7a25c0
JM		 1473 }
1474 if (wildcard)
1475 need_ssids++;
1476
1477 if (wpa_s->normal_scans < 3 &&
1478 (need_ssids <= wpa_s->max_scan_ssids ||
1479 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
1480 /*
1481 * When normal scan can speed up operations, use that for the
1482 * first operations before starting the sched_scan to allow
1483 * user space sleep more. We do this only if the normal scan
1484 * has functionality that is suitable for this or if the
1485 * sched_scan does not have better support for multiple SSIDs.
1486 */
1487 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1488 "sched_scan for initial scans (normal_scans=%d)",
1489 wpa_s->normal_scans);
1490 return -1;
1491 }
1492
cbdf3507
LC		 1493 os_memset(&params, 0, sizeof(params));
1494
b59e6f26 1495 /* If we can't allocate space for the filters, we just don't filter */
faebdeaa 1496 params.filter_ssids = os_calloc(wpa_s->max_match_sets,
b59e6f26
LC		 1497 sizeof(struct wpa_driver_scan_filter));
1498
cbdf3507
LC		 1499 prev_state = wpa_s->wpa_state;
1500 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1501 wpa_s->wpa_state == WPA_INACTIVE)
1502 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1503
7c865c68
TB		 1504 if (wpa_s->autoscan_params != NULL) {
1505 scan_params = wpa_s->autoscan_params;
1506 goto scan;
1507 }
1508
cbdf3507
LC		 1509 /* Find the starting point from which to continue scanning */
1510 ssid = wpa_s->conf->ssid;
1511 if (wpa_s->prev_sched_ssid) {
1512 while (ssid) {
1513 if (ssid == wpa_s->prev_sched_ssid) {
1514 ssid = ssid->next;
1515 break;
1516 }
1517 ssid = ssid->next;
1518 }
1519 }
1520
1521 if (!ssid || !wpa_s->prev_sched_ssid) {
1522 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
cbdf3507
LC		 1523 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1524 wpa_s->first_sched_scan = 1;
1525 ssid = wpa_s->conf->ssid;
1526 wpa_s->prev_sched_ssid = ssid;
1527 }
1528
76a5249e
JM		 1529 if (wildcard) {
1530 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
1531 params.num_ssids++;
1532 }
1533
cbdf3507 1534 while (ssid) {
349493bd 1535 if (wpas_network_disabled(wpa_s, ssid))
5edddf41 1536 goto next;
cbdf3507 1537
fcd16847
JM		 1538 if (params.num_filter_ssids < wpa_s->max_match_sets &&
1539 params.filter_ssids && ssid->ssid && ssid->ssid_len) {
1966e3d1
ES		 1540 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
1541 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
b59e6f26
LC		 1542 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
1543 ssid->ssid, ssid->ssid_len);
1544 params.filter_ssids[params.num_filter_ssids].ssid_len =
1545 ssid->ssid_len;
1546 params.num_filter_ssids++;
86b47aaf
JM		 1547 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
1548 {
1549 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
1550 "filter for sched_scan - drop filter");
1551 os_free(params.filter_ssids);
1552 params.filter_ssids = NULL;
1553 params.num_filter_ssids = 0;
b59e6f26
LC		 1554 }
1555
3f56f3a4 1556 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
76a5249e
JM		 1557 if (params.num_ssids == max_sched_scan_ssids)
1558 break; /* only room for broadcast SSID */
3f56f3a4
JM		 1559 wpa_dbg(wpa_s, MSG_DEBUG,
1560 "add to active scan ssid: %s",
1966e3d1 1561 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
cbdf3507
LC		 1562 params.ssids[params.num_ssids].ssid =
1563 ssid->ssid;
1564 params.ssids[params.num_ssids].ssid_len =
1565 ssid->ssid_len;
1566 params.num_ssids++;
b59e6f26 1567 if (params.num_ssids >= max_sched_scan_ssids) {
cbdf3507 1568 wpa_s->prev_sched_ssid = ssid;
b55aca46
JM		 1569 do {
1570 ssid = ssid->next;
1571 } while (ssid &&
349493bd 1572 (wpas_network_disabled(wpa_s, ssid) ||
fea7c3a0 1573 !ssid->scan_ssid));
cbdf3507
LC		 1574 break;
1575 }
1576 }
b59e6f26 1577
5edddf41 1578 next:
cbdf3507
LC		 1579 wpa_s->prev_sched_ssid = ssid;
1580 ssid = ssid->next;
1581 }
1582
7c6a266c
JM		 1583 if (params.num_filter_ssids == 0) {
1584 os_free(params.filter_ssids);
1585 params.filter_ssids = NULL;
1586 }
1587
a13e07ec
ES		 1588 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1589 if (extra_ie) {
1590 params.extra_ies = wpabuf_head(extra_ie);
1591 params.extra_ies_len = wpabuf_len(extra_ie);
1592 }
cbdf3507 1593
cf70d298
RM		 1594 if (wpa_s->conf->filter_rssi)
1595 params.filter_rssi = wpa_s->conf->filter_rssi;
1596
1cc0d6a0
BP		 1597 /* See if user specified frequencies. If so, scan only those. */
1598 if (wpa_s->conf->freq_list && !params.freqs) {
1599 wpa_dbg(wpa_s, MSG_DEBUG,
1600 "Optimize scan based on conf->freq_list");
1601 int_array_concat(&params.freqs, wpa_s->conf->freq_list);
1602 }
1603
2ac43334
RZ		 1604#ifdef CONFIG_MBO
1605 if (wpa_s->enable_oce & OCE_STA)
1606 params.oce_scan = 1;
1607#endif /* CONFIG_MBO */
1608
7c865c68
TB		 1609 scan_params = &params;
1610
1611scan:
32c02261
AS		 1612 wpa_s->sched_scan_timed_out = 0;
1613
1614 /*
1615 * We cannot support multiple scan plans if the scan request includes
1616 * too many SSID's, so in this case use only the last scan plan and make
1617 * it run infinitely. It will be stopped by the timeout.
1618 */
1619 if (wpa_s->sched_scan_plans_num == 1 ||
1620 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
1621 params.sched_scan_plans = wpa_s->sched_scan_plans;
1622 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
1623 } else if (wpa_s->sched_scan_plans_num > 1) {
a8cb5a88 1624 wpa_dbg(wpa_s, MSG_DEBUG,
32c02261
AS		 1625 "Too many SSIDs. Default to using single scheduled_scan plan");
1626 params.sched_scan_plans =
1627 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
1628 1];
1629 params.sched_scan_plans_num = 1;
7d21a223 1630 } else {
32c02261
AS		 1631 if (wpa_s->conf->sched_scan_interval)
1632 scan_plan.interval = wpa_s->conf->sched_scan_interval;
1633 else
1634 scan_plan.interval = 10;
1635
1636 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
1637 wpa_printf(MSG_WARNING,
1638 "Scan interval too long(%u), use the maximum allowed(%u)",
1639 scan_plan.interval,
1640 wpa_s->max_sched_scan_plan_interval);
1641 scan_plan.interval =
1642 wpa_s->max_sched_scan_plan_interval;
1643 }
1644
1645 scan_plan.iterations = 0;
1646 params.sched_scan_plans = &scan_plan;
1647 params.sched_scan_plans_num = 1;
1648 }
1649
d0330d57
PK		 1650 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
1651
32c02261 1652 if (ssid || !wpa_s->first_sched_scan) {
7d21a223 1653 wpa_dbg(wpa_s, MSG_DEBUG,
d0330d57
PK		 1654 "Starting sched scan after %u seconds: interval %u timeout %d",
1655 params.sched_scan_start_delay,
32c02261
AS		 1656 params.sched_scan_plans[0].interval,
1657 wpa_s->sched_scan_timeout);
1658 } else {
d0330d57
PK		 1659 wpa_dbg(wpa_s, MSG_DEBUG,
1660 "Starting sched scan after %u seconds (no timeout)",
1661 params.sched_scan_start_delay);
a8cb5a88 1662 }
cbdf3507 1663
faf9a858
JM		 1664 wpa_setband_scan_freqs(wpa_s, scan_params);
1665
346b333d
SD		 1666 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) &&
1667 wpa_s->wpa_state <= WPA_SCANNING) {
56c76fa5
IP		 1668 params.mac_addr_rand = 1;
1669 if (wpa_s->mac_addr_sched_scan) {
1670 params.mac_addr = wpa_s->mac_addr_sched_scan;
1671 params.mac_addr_mask = wpa_s->mac_addr_sched_scan +
1672 ETH_ALEN;
1673 }
1674 }
1675
57c3a605 1676 wpa_scan_set_relative_rssi_params(wpa_s, scan_params);
1677
32c02261 1678 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
a13e07ec 1679 wpabuf_free(extra_ie);
b59e6f26 1680 os_free(params.filter_ssids);
cbdf3507
LC		 1681 if (ret) {
1682 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
1683 if (prev_state != wpa_s->wpa_state)
1684 wpa_supplicant_set_state(wpa_s, prev_state);
1685 return ret;
1686 }
1687
1688 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1689 if (ssid || !wpa_s->first_sched_scan) {
1690 wpa_s->sched_scan_timed_out = 0;
1691 eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
1692 wpa_supplicant_sched_scan_timeout,
1693 wpa_s, NULL);
1694 wpa_s->first_sched_scan = 0;
1695 wpa_s->sched_scan_timeout /= 2;
32c02261
AS		 1696 params.sched_scan_plans[0].interval *= 2;
1697 if ((unsigned int) wpa_s->sched_scan_timeout <
1698 params.sched_scan_plans[0].interval ||
1699 params.sched_scan_plans[0].interval >
1700 wpa_s->max_sched_scan_plan_interval) {
1701 params.sched_scan_plans[0].interval = 10;
a09fc1cc
DS		 1702 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1703 }
cbdf3507
LC		 1704 }
1705
7ed52f67
DS		 1706 /* If there is no more ssids, start next time from the beginning */
1707 if (!ssid)
1708 wpa_s->prev_sched_ssid = NULL;
1709
cbdf3507
LC		 1710 return 0;
1711}
1712
1713
6fc6879b
JM		 1714/**
1715 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1716 * @wpa_s: Pointer to wpa_supplicant data
1717 *
1718 * This function is used to cancel a scan request scheduled with
1719 * wpa_supplicant_req_scan().
1720 */
1721void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
1722{
f049052b 1723 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
6fc6879b
JM		 1724 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
1725}
cb8564b1
DW		 1726
1727
831770bf
CZ		 1728/**
1729 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1730 * @wpa_s: Pointer to wpa_supplicant data
1731 *
1732 * This function is used to stop a delayed scheduled scan.
1733 */
1734void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
1735{
1736 if (!wpa_s->sched_scan_supported)
1737 return;
1738
1739 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
1740 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
1741 wpa_s, NULL);
1742}
1743
1744
cbdf3507
LC		 1745/**
1746 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1747 * @wpa_s: Pointer to wpa_supplicant data
1748 *
1749 * This function is used to stop a periodic scheduled scan.
1750 */
1751void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
1752{
1753 if (!wpa_s->sched_scanning)
1754 return;
1755
14f34a73
AS		 1756 if (wpa_s->sched_scanning)
1757 wpa_s->sched_scan_stop_req = 1;
1758
cbdf3507
LC		 1759 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
1760 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
1761 wpa_supplicant_stop_sched_scan(wpa_s);
1762}
1763
1764
2c09af30
JM		 1765/**
1766 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1767 * @wpa_s: Pointer to wpa_supplicant data
1768 * @scanning: Whether scanning is currently in progress
1769 *
1770 * This function is to generate scanning notifycations. It is called whenever
1771 * there may have been a change in scanning (scan started, completed, stopped).
1772 * wpas_notify_scanning() is called whenever the scanning state changed from the
1773 * previously notified state.
1774 */
cb8564b1
DW		 1775void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
1776 int scanning)
1777{
1778 if (wpa_s->scanning != scanning) {
1779 wpa_s->scanning = scanning;
8bac466b 1780 wpas_notify_scanning(wpa_s);
cb8564b1
DW		 1781 }
1782}
1783
9ba9fa07
JM		 1784
1785static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
1786{
1787 int rate = 0;
1788 const u8 *ie;
1789 int i;
1790
1791 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
1792 for (i = 0; ie && i < ie[1]; i++) {
1793 if ((ie[i + 2] & 0x7f) > rate)
1794 rate = ie[i + 2] & 0x7f;
1795 }
1796
1797 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
1798 for (i = 0; ie && i < ie[1]; i++) {
1799 if ((ie[i + 2] & 0x7f) > rate)
1800 rate = ie[i + 2] & 0x7f;
1801 }
1802
1803 return rate;
1804}
1805
1806
2c09af30
JM		 1807/**
1808 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1809 * @res: Scan result entry
1810 * @ie: Information element identitifier (WLAN_EID_*)
1811 * Returns: Pointer to the information element (id field) or %NULL if not found
1812 *
1813 * This function returns the first matching information element in the scan
1814 * result.
1815 */
d1f9c410
JM		 1816const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
1817{
d044d2f7
EP		 1818 size_t ie_len = res->ie_len;
1819
1820 /* Use the Beacon frame IEs if res->ie_len is not available */
1821 if (!ie_len)
1822 ie_len = res->beacon_ie_len;
1823
1824 return get_ie((const u8 *) (res + 1), ie_len, ie);
d1f9c410
JM		 1825}
1826
1827
2c09af30
JM		 1828/**
1829 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1830 * @res: Scan result entry
1831 * @vendor_type: Vendor type (four octets starting the IE payload)
1832 * Returns: Pointer to the information element (id field) or %NULL if not found
1833 *
1834 * This function returns the first matching information element in the scan
1835 * result.
1836 */
9ba9fa07
JM		 1837const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1838 u32 vendor_type)
1839{
1840 const u8 *end, *pos;
1841
1842 pos = (const u8 *) (res + 1);
1843 end = pos + res->ie_len;
1844
904e977b
JM		 1845 while (end - pos > 1) {
1846 if (2 + pos[1] > end - pos)
9ba9fa07
JM		 1847 break;
1848 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1849 vendor_type == WPA_GET_BE32(&pos[2]))
1850 return pos;
1851 pos += 2 + pos[1];
1852 }
1853
1854 return NULL;
1855}
1856
1857
aaeb9c98
JM		 1858/**
1859 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1860 * @res: Scan result entry
1861 * @vendor_type: Vendor type (four octets starting the IE payload)
1862 * Returns: Pointer to the information element (id field) or %NULL if not found
1863 *
1864 * This function returns the first matching information element in the scan
1865 * result.
1866 *
1867 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1868 * from Beacon frames instead of either Beacon or Probe Response frames.
1869 */
1870const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
1871 u32 vendor_type)
1872{
1873 const u8 *end, *pos;
1874
1875 if (res->beacon_ie_len == 0)
1876 return NULL;
1877
1878 pos = (const u8 *) (res + 1);
1879 pos += res->ie_len;
1880 end = pos + res->beacon_ie_len;
1881
904e977b
JM		 1882 while (end - pos > 1) {
1883 if (2 + pos[1] > end - pos)
aaeb9c98
JM		 1884 break;
1885 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1886 vendor_type == WPA_GET_BE32(&pos[2]))
1887 return pos;
1888 pos += 2 + pos[1];
1889 }
1890
1891 return NULL;
1892}
1893
1894
2c09af30
JM		 1895/**
1896 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1897 * @res: Scan result entry
1898 * @vendor_type: Vendor type (four octets starting the IE payload)
1899 * Returns: Pointer to the information element payload or %NULL if not found
1900 *
1901 * This function returns concatenated payload of possibly fragmented vendor
1902 * specific information elements in the scan result. The caller is responsible
1903 * for freeing the returned buffer.
1904 */
9ba9fa07
JM		 1905struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1906 u32 vendor_type)
1907{
1908 struct wpabuf *buf;
1909 const u8 *end, *pos;
1910
1911 buf = wpabuf_alloc(res->ie_len);
1912 if (buf == NULL)
1913 return NULL;
1914
1915 pos = (const u8 *) (res + 1);
1916 end = pos + res->ie_len;
1917
904e977b
JM		 1918 while (end - pos > 1) {
1919 if (2 + pos[1] > end - pos)
54f489be
JM		 1920 break;
1921 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1922 vendor_type == WPA_GET_BE32(&pos[2]))
1923 wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4);
1924 pos += 2 + pos[1];
1925 }
1926
1927 if (wpabuf_len(buf) == 0) {
1928 wpabuf_free(buf);
1929 buf = NULL;
1930 }
1931
1932 return buf;
1933}
1934
1935
577db0ae
GM		 1936/*
1937 * Channels with a great SNR can operate at full rate. What is a great SNR?
1938 * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general
1939 * rule of thumb is that any SNR above 20 is good." This one
1940 * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23
14204148
JM		 1941 * recommends 25 as a minimum SNR for 54 Mbps data rate. The estimates used in
1942 * scan_est_throughput() allow even smaller SNR values for the maximum rates
1943 * (21 for 54 Mbps, 22 for VHT80 MCS9, 24 for HT40 and HT20 MCS7). Use 25 as a
1944 * somewhat conservative value here.
577db0ae 1945 */
14204148 1946#define GREAT_SNR 25
577db0ae 1947
f0d0a5d2
MA		 1948#define IS_5GHZ(n) (n > 4000)
1949
9ba9fa07
JM		 1950/* Compare function for sorting scan results. Return >0 if @b is considered
1951 * better. */
1952static int wpa_scan_result_compar(const void *a, const void *b)
1953{
577db0ae 1954#define MIN(a,b) a < b ? a : b
9ba9fa07
JM		 1955 struct wpa_scan_res **_wa = (void *) a;
1956 struct wpa_scan_res **_wb = (void *) b;
1957 struct wpa_scan_res *wa = *_wa;
1958 struct wpa_scan_res *wb = *_wb;
a1b790eb
JM		 1959 int wpa_a, wpa_b;
1960 int snr_a, snr_b, snr_a_full, snr_b_full;
9ba9fa07
JM		 1961
1962 /* WPA/WPA2 support preferred */
1963 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
1964 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
1965 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
1966 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
1967
1968 if (wpa_b && !wpa_a)
1969 return 1;
1970 if (!wpa_b && wpa_a)
1971 return -1;
1972
1973 /* privacy support preferred */
1974 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1975 (wb->caps & IEEE80211_CAP_PRIVACY))
1976 return 1;
1977 if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1978 (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1979 return -1;
1980
f0d0a5d2 1981 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
a1b790eb
JM		 1982 snr_a_full = wa->snr;
1983 snr_a = MIN(wa->snr, GREAT_SNR);
1984 snr_b_full = wb->snr;
aa517ae2 1985 snr_b = MIN(wb->snr, GREAT_SNR);
577db0ae 1986 } else {
f0d0a5d2
MA		 1987 /* Level is not in dBm, so we can't calculate
1988 * SNR. Just use raw level (units unknown). */
a1b790eb
JM		 1989 snr_a = snr_a_full = wa->level;
1990 snr_b = snr_b_full = wb->level;
577db0ae
GM		 1991 }
1992
f0d0a5d2 1993 /* if SNR is close, decide by max rate or frequency band */
b4d56efb 1994 if (snr_a && snr_b && abs(snr_b - snr_a) < 7) {
a1b790eb
JM		 1995 if (wa->est_throughput != wb->est_throughput)
1996 return wb->est_throughput - wa->est_throughput;
b4d56efb
JM		 1997 }
1998 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
1999 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
577db0ae
GM		 2000 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
2001 return IS_5GHZ(wa->freq) ? -1 : 1;
9ba9fa07
JM		 2002 }
2003
577db0ae 2004 /* all things being equal, use SNR; if SNRs are
9ba9fa07
JM		 2005 * identical, use quality values since some drivers may only report
2006 * that value and leave the signal level zero */
a1b790eb 2007 if (snr_b_full == snr_a_full)
9ba9fa07 2008 return wb->qual - wa->qual;
a1b790eb 2009 return snr_b_full - snr_a_full;
577db0ae 2010#undef MIN
9ba9fa07
JM		 2011}
2012
2013
41e650ae
JM		 2014#ifdef CONFIG_WPS
2015/* Compare function for sorting scan results when searching a WPS AP for
2016 * provisioning. Return >0 if @b is considered better. */
2017static int wpa_scan_result_wps_compar(const void *a, const void *b)
2018{
2019 struct wpa_scan_res **_wa = (void *) a;
2020 struct wpa_scan_res **_wb = (void *) b;
2021 struct wpa_scan_res *wa = *_wa;
2022 struct wpa_scan_res *wb = *_wb;
2023 int uses_wps_a, uses_wps_b;
2024 struct wpabuf *wps_a, *wps_b;
2025 int res;
2026
2027 /* Optimization - check WPS IE existence before allocated memory and
2028 * doing full reassembly. */
2029 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
2030 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
2031 if (uses_wps_a && !uses_wps_b)
2032 return -1;
2033 if (!uses_wps_a && uses_wps_b)
2034 return 1;
2035
2036 if (uses_wps_a && uses_wps_b) {
2037 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
2038 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
2039 res = wps_ap_priority_compar(wps_a, wps_b);
2040 wpabuf_free(wps_a);
2041 wpabuf_free(wps_b);
2042 if (res)
2043 return res;
2044 }
2045
2046 /*
2047 * Do not use current AP security policy as a sorting criteria during
2048 * WPS provisioning step since the AP may get reconfigured at the
2049 * completion of provisioning.
2050 */
2051
2052 /* all things being equal, use signal level; if signal levels are
2053 * identical, use quality values since some drivers may only report
2054 * that value and leave the signal level zero */
2055 if (wb->level == wa->level)
2056 return wb->qual - wa->qual;
2057 return wb->level - wa->level;
2058}
2059#endif /* CONFIG_WPS */
2060
2061
aa820e02
JM		 2062static void dump_scan_res(struct wpa_scan_results *scan_res)
2063{
76202aed 2064#ifndef CONFIG_NO_STDOUT_DEBUG
aa820e02
JM		 2065 size_t i;
2066
2067 if (scan_res->res == NULL || scan_res->num == 0)
2068 return;
2069
2070 wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
2071
2072 for (i = 0; i < scan_res->num; i++) {
2073 struct wpa_scan_res *r = scan_res->res[i];
1cbe86e2 2074 u8 *pos;
f0d0a5d2 2075 if (r->flags & WPA_SCAN_LEVEL_DBM) {
f0d0a5d2
MA		 2076 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
2077
aa820e02 2078 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
a1b790eb 2079 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
aa820e02 2080 MAC2STR(r->bssid), r->freq, r->qual,
f0d0a5d2 2081 r->noise, noise_valid ? "" : "~", r->level,
a1b790eb
JM		 2082 r->snr, r->snr >= GREAT_SNR ? "*" : "",
2083 r->flags,
2084 r->age, r->est_throughput);
aa820e02
JM		 2085 } else {
2086 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
a1b790eb 2087 "noise=%d level=%d flags=0x%x age=%u est=%u",
aa820e02 2088 MAC2STR(r->bssid), r->freq, r->qual,
a1b790eb
JM		 2089 r->noise, r->level, r->flags, r->age,
2090 r->est_throughput);
aa820e02 2091 }
1cbe86e2
JM		 2092 pos = (u8 *) (r + 1);
2093 if (r->ie_len)
2094 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
2095 pos += r->ie_len;
2096 if (r->beacon_ie_len)
2097 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
2098 pos, r->beacon_ie_len);
aa820e02 2099 }
76202aed 2100#endif /* CONFIG_NO_STDOUT_DEBUG */
aa820e02
JM		 2101}
2102
2103
2c09af30
JM		 2104/**
2105 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
2106 * @wpa_s: Pointer to wpa_supplicant data
2107 * @bssid: BSSID to check
2108 * Returns: 0 if the BSSID is filtered or 1 if not
2109 *
2110 * This function is used to filter out specific BSSIDs from scan reslts mainly
2111 * for testing purposes (SET bssid_filter ctrl_iface command).
2112 */
d445a5cd
JM		 2113int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
2114 const u8 *bssid)
2115{
2116 size_t i;
2117
2118 if (wpa_s->bssid_filter == NULL)
2119 return 1;
2120
2121 for (i = 0; i < wpa_s->bssid_filter_count; i++) {
2122 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
2123 ETH_ALEN) == 0)
2124 return 1;
2125 }
2126
2127 return 0;
2128}
2129
2130
2f195639
KV		 2131void filter_scan_res(struct wpa_supplicant *wpa_s,
2132 struct wpa_scan_results *res)
d445a5cd
JM		 2133{
2134 size_t i, j;
2135
2136 if (wpa_s->bssid_filter == NULL)
2137 return;
2138
2139 for (i = 0, j = 0; i < res->num; i++) {
2140 if (wpa_supplicant_filter_bssid_match(wpa_s,
2141 res->res[i]->bssid)) {
2142 res->res[j++] = res->res[i];
2143 } else {
2144 os_free(res->res[i]);
2145 res->res[i] = NULL;
2146 }
2147 }
2148
2149 if (res->num != j) {
2150 wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
2151 (int) (res->num - j));
2152 res->num = j;
2153 }
2154}
2155
2156
f0d0a5d2
MA		 2157/*
2158 * Noise floor values to use when we have signal strength
585141bb 2159 * measurements, but no noise floor measurements. These values were
f0d0a5d2
MA		 2160 * measured in an office environment with many APs.
2161 */
2162#define DEFAULT_NOISE_FLOOR_2GHZ (-89)
2163#define DEFAULT_NOISE_FLOOR_5GHZ (-92)
2164
2f195639 2165void scan_snr(struct wpa_scan_res *res)
a1b790eb
JM		 2166{
2167 if (res->flags & WPA_SCAN_NOISE_INVALID) {
2168 res->noise = IS_5GHZ(res->freq) ?
2169 DEFAULT_NOISE_FLOOR_5GHZ :
2170 DEFAULT_NOISE_FLOOR_2GHZ;
2171 }
2172
2173 if (res->flags & WPA_SCAN_LEVEL_DBM) {
2174 res->snr = res->level - res->noise;
2175 } else {
2176 /* Level is not in dBm, so we can't calculate
2177 * SNR. Just use raw level (units unknown). */
2178 res->snr = res->level;
2179 }
2180}
2181
2182
2183static unsigned int max_ht20_rate(int snr)
2184{
2185 if (snr < 6)
2186 return 6500; /* HT20 MCS0 */
2187 if (snr < 8)
2188 return 13000; /* HT20 MCS1 */
2189 if (snr < 13)
2190 return 19500; /* HT20 MCS2 */
2191 if (snr < 17)
2192 return 26000; /* HT20 MCS3 */
2193 if (snr < 20)
2194 return 39000; /* HT20 MCS4 */
2195 if (snr < 23)
2196 return 52000; /* HT20 MCS5 */
2197 if (snr < 24)
2198 return 58500; /* HT20 MCS6 */
2199 return 65000; /* HT20 MCS7 */
2200}
2201
2202
2203static unsigned int max_ht40_rate(int snr)
2204{
2205 if (snr < 3)
2206 return 13500; /* HT40 MCS0 */
2207 if (snr < 6)
2208 return 27000; /* HT40 MCS1 */
2209 if (snr < 10)
2210 return 40500; /* HT40 MCS2 */
2211 if (snr < 15)
2212 return 54000; /* HT40 MCS3 */
2213 if (snr < 17)
2214 return 81000; /* HT40 MCS4 */
2215 if (snr < 22)
2216 return 108000; /* HT40 MCS5 */
8b2b718d 2217 if (snr < 24)
a1b790eb
JM		 2218 return 121500; /* HT40 MCS6 */
2219 return 135000; /* HT40 MCS7 */
2220}
2221
2222
2223static unsigned int max_vht80_rate(int snr)
2224{
2225 if (snr < 1)
2226 return 0;
2227 if (snr < 2)
2228 return 29300; /* VHT80 MCS0 */
2229 if (snr < 5)
2230 return 58500; /* VHT80 MCS1 */
2231 if (snr < 9)
2232 return 87800; /* VHT80 MCS2 */
2233 if (snr < 11)
2234 return 117000; /* VHT80 MCS3 */
2235 if (snr < 15)
2236 return 175500; /* VHT80 MCS4 */
2237 if (snr < 16)
2238 return 234000; /* VHT80 MCS5 */
2239 if (snr < 18)
2240 return 263300; /* VHT80 MCS6 */
2241 if (snr < 20)
2242 return 292500; /* VHT80 MCS7 */
2243 if (snr < 22)
2244 return 351000; /* VHT80 MCS8 */
2245 return 390000; /* VHT80 MCS9 */
2246}
2247
2248
2f195639
KV		 2249void scan_est_throughput(struct wpa_supplicant *wpa_s,
2250 struct wpa_scan_res *res)
a1b790eb
JM		 2251{
2252 enum local_hw_capab capab = wpa_s->hw_capab;
2253 int rate; /* max legacy rate in 500 kb/s units */
2254 const u8 *ie;
2255 unsigned int est, tmp;
2256 int snr = res->snr;
2257
2258 if (res->est_throughput)
2259 return;
2260
2261 /* Get maximum legacy rate */
2262 rate = wpa_scan_get_max_rate(res);
2263
2264 /* Limit based on estimated SNR */
2265 if (rate > 1 * 2 && snr < 1)
2266 rate = 1 * 2;
2267 else if (rate > 2 * 2 && snr < 4)
2268 rate = 2 * 2;
2269 else if (rate > 6 * 2 && snr < 5)
2270 rate = 6 * 2;
2271 else if (rate > 9 * 2 && snr < 6)
2272 rate = 9 * 2;
2273 else if (rate > 12 * 2 && snr < 7)
2274 rate = 12 * 2;
2275 else if (rate > 18 * 2 && snr < 10)
2276 rate = 18 * 2;
2277 else if (rate > 24 * 2 && snr < 11)
2278 rate = 24 * 2;
2279 else if (rate > 36 * 2 && snr < 15)
2280 rate = 36 * 2;
2281 else if (rate > 48 * 2 && snr < 19)
2282 rate = 48 * 2;
2283 else if (rate > 54 * 2 && snr < 21)
2284 rate = 54 * 2;
2285 est = rate * 500;
2286
2287 if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2288 ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP);
2289 if (ie) {
2290 tmp = max_ht20_rate(snr);
2291 if (tmp > est)
2292 est = tmp;
2293 }
2294 }
2295
2296 if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
2297 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2298 if (ie && ie[1] >= 2 &&
2299 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2300 tmp = max_ht40_rate(snr);
2301 if (tmp > est)
2302 est = tmp;
2303 }
2304 }
2305
2306 if (capab == CAPAB_VHT) {
2307 /* Use +1 to assume VHT is always faster than HT */
2308 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP);
2309 if (ie) {
2310 tmp = max_ht20_rate(snr) + 1;
2311 if (tmp > est)
2312 est = tmp;
2313
2314 ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION);
2315 if (ie && ie[1] >= 2 &&
2316 (ie[3] &
2317 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2318 tmp = max_ht40_rate(snr) + 1;
2319 if (tmp > est)
2320 est = tmp;
2321 }
2322
2323 ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION);
2324 if (ie && ie[1] >= 1 &&
2325 (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
2326 tmp = max_vht80_rate(snr) + 1;
2327 if (tmp > est)
2328 est = tmp;
2329 }
2330 }
2331 }
2332
2333 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
2334
2335 res->est_throughput = est;
2336}
2337
2338
9ba9fa07
JM		 2339/**
2340 * wpa_supplicant_get_scan_results - Get scan results
2341 * @wpa_s: Pointer to wpa_supplicant data
2342 * @info: Information about what was scanned or %NULL if not available
2343 * @new_scan: Whether a new scan was performed
2344 * Returns: Scan results, %NULL on failure
2345 *
2346 * This function request the current scan results from the driver and updates
2347 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2348 * results with wpa_scan_results_free().
2349 */
2350struct wpa_scan_results *
2351wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
2352 struct scan_info *info, int new_scan)
2353{
2354 struct wpa_scan_results *scan_res;
2355 size_t i;
41e650ae 2356 int (*compar)(const void *, const void *) = wpa_scan_result_compar;
9ba9fa07 2357
17fbb751 2358 scan_res = wpa_drv_get_scan_results2(wpa_s);
9ba9fa07 2359 if (scan_res == NULL) {
f049052b 2360 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
9ba9fa07
JM		 2361 return NULL;
2362 }
c5f10e80
JM		 2363 if (scan_res->fetch_time.sec == 0) {
2364 /*
2365 * Make sure we have a valid timestamp if the driver wrapper
2366 * does not set this.
2367 */
acb69cec 2368 os_get_reltime(&scan_res->fetch_time);
c5f10e80 2369 }
d445a5cd 2370 filter_scan_res(wpa_s, scan_res);
9ba9fa07 2371
f0d0a5d2
MA		 2372 for (i = 0; i < scan_res->num; i++) {
2373 struct wpa_scan_res *scan_res_item = scan_res->res[i];
2374
a1b790eb
JM		 2375 scan_snr(scan_res_item);
2376 scan_est_throughput(wpa_s, scan_res_item);
f0d0a5d2
MA		 2377 }
2378
41e650ae 2379#ifdef CONFIG_WPS
3187fd90 2380 if (wpas_wps_searching(wpa_s)) {
f049052b
BG		 2381 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
2382 "provisioning rules");
41e650ae
JM		 2383 compar = wpa_scan_result_wps_compar;
2384 }
2385#endif /* CONFIG_WPS */
2386
33111c91
JC		 2387 if (scan_res->res) {
2388 qsort(scan_res->res, scan_res->num,
2389 sizeof(struct wpa_scan_res *), compar);
2390 }
aa820e02 2391 dump_scan_res(scan_res);
9ba9fa07 2392
6e374bd4
JM		 2393 if (wpa_s->ignore_post_flush_scan_res) {
2394 /* FLUSH command aborted an ongoing scan and these are the
2395 * results from the aborted scan. Do not process the results to
2396 * maintain flushed state. */
2397 wpa_dbg(wpa_s, MSG_DEBUG,
2398 "Do not update BSS table based on pending post-FLUSH scan results");
2399 wpa_s->ignore_post_flush_scan_res = 0;
2400 return scan_res;
2401 }
2402
9ba9fa07
JM		 2403 wpa_bss_update_start(wpa_s);
2404 for (i = 0; i < scan_res->num; i++)
c5f10e80
JM		 2405 wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
2406 &scan_res->fetch_time);
9ba9fa07
JM		 2407 wpa_bss_update_end(wpa_s, info, new_scan);
2408
2409 return scan_res;
2410}
2411
2412
2c09af30
JM		 2413/**
2414 * wpa_supplicant_update_scan_results - Update scan results from the driver
2415 * @wpa_s: Pointer to wpa_supplicant data
2416 * Returns: 0 on success, -1 on failure
2417 *
2418 * This function updates the BSS table within wpa_supplicant based on the
2419 * currently available scan results from the driver without requesting a new
2420 * scan. This is used in cases where the driver indicates an association
2421 * (including roaming within ESS) and wpa_supplicant does not yet have the
2422 * needed information to complete the connection (e.g., to perform validation
2423 * steps in 4-way handshake).
2424 */
9ba9fa07
JM		 2425int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
2426{
2427 struct wpa_scan_results *scan_res;
2428 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
2429 if (scan_res == NULL)
2430 return -1;
2431 wpa_scan_results_free(scan_res);
2432
2433 return 0;
2434}
66fe0f70
DS		 2435
2436
2437/**
2438 * scan_only_handler - Reports scan results
2439 */
2440void scan_only_handler(struct wpa_supplicant *wpa_s,
2441 struct wpa_scan_results *scan_res)
2442{
2443 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
d81c73be
JM		 2444 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2445 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
2446 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
2447 wpa_s->manual_scan_id);
2448 wpa_s->manual_scan_use_id = 0;
2449 } else {
2450 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
2451 }
66fe0f70
DS		 2452 wpas_notify_scan_results(wpa_s);
2453 wpas_notify_scan_done(wpa_s, 1);
d12a51b5
JM		 2454 if (wpa_s->scan_work) {
2455 struct wpa_radio_work *work = wpa_s->scan_work;
2456 wpa_s->scan_work = NULL;
2457 radio_work_done(work);
2458 }
ea6030c7
JM		 2459
2460 if (wpa_s->wpa_state == WPA_SCANNING)
2461 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
66fe0f70 2462}
407be00b
JM		 2463
2464
2465int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
2466{
2467 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
2468}
dd43aaa5
JM		 2469
2470
2471struct wpa_driver_scan_params *
2472wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
2473{
2474 struct wpa_driver_scan_params *params;
2475 size_t i;
2476 u8 *n;
2477
2478 params = os_zalloc(sizeof(*params));
2479 if (params == NULL)
2480 return NULL;
2481
2482 for (i = 0; i < src->num_ssids; i++) {
2483 if (src->ssids[i].ssid) {
a1f11e34
JB		 2484 n = os_memdup(src->ssids[i].ssid,
2485 src->ssids[i].ssid_len);
dd43aaa5
JM		 2486 if (n == NULL)
2487 goto failed;
dd43aaa5
JM		 2488 params->ssids[i].ssid = n;
2489 params->ssids[i].ssid_len = src->ssids[i].ssid_len;
2490 }
2491 }
2492 params->num_ssids = src->num_ssids;
2493
2494 if (src->extra_ies) {
a1f11e34 2495 n = os_memdup(src->extra_ies, src->extra_ies_len);
dd43aaa5
JM		 2496 if (n == NULL)
2497 goto failed;
dd43aaa5
JM		 2498 params->extra_ies = n;
2499 params->extra_ies_len = src->extra_ies_len;
2500 }
2501
2502 if (src->freqs) {
2503 int len = int_array_len(src->freqs);
a1f11e34 2504 params->freqs = os_memdup(src->freqs, (len + 1) * sizeof(int));
dd43aaa5
JM		 2505 if (params->freqs == NULL)
2506 goto failed;
dd43aaa5
JM		 2507 }
2508
2509 if (src->filter_ssids) {
a1f11e34
JB		 2510 params->filter_ssids = os_memdup(src->filter_ssids,
2511 sizeof(*params->filter_ssids) *
dd43aaa5
JM		 2512 src->num_filter_ssids);
2513 if (params->filter_ssids == NULL)
2514 goto failed;
dd43aaa5
JM		 2515 params->num_filter_ssids = src->num_filter_ssids;
2516 }
2517
2518 params->filter_rssi = src->filter_rssi;
2519 params->p2p_probe = src->p2p_probe;
2520 params->only_new_results = src->only_new_results;
57a8f8af 2521 params->low_priority = src->low_priority;
c16b9f8d
AS		 2522 params->duration = src->duration;
2523 params->duration_mandatory = src->duration_mandatory;
938dd97a 2524 params->oce_scan = src->oce_scan;
dd43aaa5 2525
09ea4309
AS		 2526 if (src->sched_scan_plans_num > 0) {
2527 params->sched_scan_plans =
a1f11e34
JB		 2528 os_memdup(src->sched_scan_plans,
2529 sizeof(*src->sched_scan_plans) *
09ea4309
AS		 2530 src->sched_scan_plans_num);
2531 if (!params->sched_scan_plans)
2532 goto failed;
2533
09ea4309
AS		 2534 params->sched_scan_plans_num = src->sched_scan_plans_num;
2535 }
2536
56c76fa5
IP		 2537 if (src->mac_addr_rand) {
2538 params->mac_addr_rand = src->mac_addr_rand;
2539
2540 if (src->mac_addr && src->mac_addr_mask) {
2541 u8 *mac_addr;
2542
2543 mac_addr = os_malloc(2 * ETH_ALEN);
2544 if (!mac_addr)
2545 goto failed;
2546
2547 os_memcpy(mac_addr, src->mac_addr, ETH_ALEN);
2548 os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask,
2549 ETH_ALEN);
2550 params->mac_addr = mac_addr;
2551 params->mac_addr_mask = mac_addr + ETH_ALEN;
2552 }
2553 }
eb20cea5
JM		 2554
2555 if (src->bssid) {
2556 u8 *bssid;
2557
a1f11e34 2558 bssid = os_memdup(src->bssid, ETH_ALEN);
eb20cea5
JM		 2559 if (!bssid)
2560 goto failed;
eb20cea5
JM		 2561 params->bssid = bssid;
2562 }
2563
57c3a605 2564 params->relative_rssi_set = src->relative_rssi_set;
2565 params->relative_rssi = src->relative_rssi;
2566 params->relative_adjust_band = src->relative_adjust_band;
2567 params->relative_adjust_rssi = src->relative_adjust_rssi;
dd43aaa5
JM		 2568 return params;
2569
2570failed:
2571 wpa_scan_free_params(params);
2572 return NULL;
2573}
2574
2575
2576void wpa_scan_free_params(struct wpa_driver_scan_params *params)
2577{
2578 size_t i;
2579
2580 if (params == NULL)
2581 return;
2582
2583 for (i = 0; i < params->num_ssids; i++)
2584 os_free((u8 *) params->ssids[i].ssid);
2585 os_free((u8 *) params->extra_ies);
2586 os_free(params->freqs);
2587 os_free(params->filter_ssids);
09ea4309 2588 os_free(params->sched_scan_plans);
56c76fa5
IP		 2589
2590 /*
2591 * Note: params->mac_addr_mask points to same memory allocation and
2592 * must not be freed separately.
2593 */
2594 os_free((u8 *) params->mac_addr);
2595
eb20cea5
JM		 2596 os_free((u8 *) params->bssid);
2597
dd43aaa5
JM		 2598 os_free(params);
2599}
737e7a08
AB		 2600
2601
2602int wpas_start_pno(struct wpa_supplicant *wpa_s)
2603{
32c02261 2604 int ret, prio;
4ed34922 2605 size_t i, num_ssid, num_match_ssid;
737e7a08
AB		 2606 struct wpa_ssid *ssid;
2607 struct wpa_driver_scan_params params;
32c02261 2608 struct sched_scan_plan scan_plan;
f89c32e6 2609 unsigned int max_sched_scan_ssids;
737e7a08 2610
5e3ddf4d
AB		 2611 if (!wpa_s->sched_scan_supported)
2612 return -1;
2613
f89c32e6
DS		 2614 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
2615 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
2616 else
2617 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
2618 if (max_sched_scan_ssids < 1)
2619 return -1;
2620
737e7a08
AB		 2621 if (wpa_s->pno || wpa_s->pno_sched_pending)
2622 return 0;
2623
2624 if ((wpa_s->wpa_state > WPA_SCANNING) &&
b4fd1f0e 2625 (wpa_s->wpa_state < WPA_COMPLETED)) {
737e7a08
AB		 2626 wpa_printf(MSG_ERROR, "PNO: In assoc process");
2627 return -EAGAIN;
2628 }
2629
2630 if (wpa_s->wpa_state == WPA_SCANNING) {
2631 wpa_supplicant_cancel_scan(wpa_s);
2632 if (wpa_s->sched_scanning) {
2633 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
2634 "ongoing sched scan");
2635 wpa_supplicant_cancel_sched_scan(wpa_s);
2636 wpa_s->pno_sched_pending = 1;
2637 return 0;
2638 }
2639 }
2640
5ac8f862
AS		 2641 if (wpa_s->sched_scan_stop_req) {
2642 wpa_printf(MSG_DEBUG,
2643 "Schedule PNO after previous sched scan has stopped");
2644 wpa_s->pno_sched_pending = 1;
2645 return 0;
2646 }
2647
737e7a08
AB		 2648 os_memset(&params, 0, sizeof(params));
2649
4ed34922 2650 num_ssid = num_match_ssid = 0;
737e7a08
AB		 2651 ssid = wpa_s->conf->ssid;
2652 while (ssid) {
4ed34922
DS		 2653 if (!wpas_network_disabled(wpa_s, ssid)) {
2654 num_match_ssid++;
2655 if (ssid->scan_ssid)
2656 num_ssid++;
2657 }
737e7a08
AB		 2658 ssid = ssid->next;
2659 }
4ed34922
DS		 2660
2661 if (num_match_ssid == 0) {
2662 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
2663 return -1;
2664 }
2665
2666 if (num_match_ssid > num_ssid) {
2667 params.num_ssids++; /* wildcard */
2668 num_ssid++;
2669 }
2670
f89c32e6 2671 if (num_ssid > max_sched_scan_ssids) {
737e7a08 2672 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
f89c32e6
DS		 2673 "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
2674 num_ssid = max_sched_scan_ssids;
737e7a08
AB		 2675 }
2676
4ed34922
DS		 2677 if (num_match_ssid > wpa_s->max_match_sets) {
2678 num_match_ssid = wpa_s->max_match_sets;
2679 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
737e7a08 2680 }
4ed34922
DS		 2681 params.filter_ssids = os_calloc(num_match_ssid,
2682 sizeof(struct wpa_driver_scan_filter));
737e7a08
AB		 2683 if (params.filter_ssids == NULL)
2684 return -1;
6f5e1b0b 2685
737e7a08 2686 i = 0;
6f5e1b0b
DS		 2687 prio = 0;
2688 ssid = wpa_s->conf->pssid[prio];
737e7a08
AB		 2689 while (ssid) {
2690 if (!wpas_network_disabled(wpa_s, ssid)) {
4ed34922
DS		 2691 if (ssid->scan_ssid && params.num_ssids < num_ssid) {
2692 params.ssids[params.num_ssids].ssid =
2693 ssid->ssid;
2694 params.ssids[params.num_ssids].ssid_len =
2695 ssid->ssid_len;
2696 params.num_ssids++;
2697 }
737e7a08
AB		 2698 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
2699 ssid->ssid_len);
2700 params.filter_ssids[i].ssid_len = ssid->ssid_len;
2701 params.num_filter_ssids++;
2702 i++;
4ed34922 2703 if (i == num_match_ssid)
737e7a08
AB		 2704 break;
2705 }
6f5e1b0b
DS		 2706 if (ssid->pnext)
2707 ssid = ssid->pnext;
2708 else if (prio + 1 == wpa_s->conf->num_prio)
2709 break;
2710 else
2711 ssid = wpa_s->conf->pssid[++prio];
737e7a08
AB		 2712 }
2713
2714 if (wpa_s->conf->filter_rssi)
2715 params.filter_rssi = wpa_s->conf->filter_rssi;
2716
32c02261
AS		 2717 if (wpa_s->sched_scan_plans_num) {
2718 params.sched_scan_plans = wpa_s->sched_scan_plans;
2719 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
2720 } else {
2721 /* Set one scan plan that will run infinitely */
2722 if (wpa_s->conf->sched_scan_interval)
2723 scan_plan.interval = wpa_s->conf->sched_scan_interval;
2724 else
2725 scan_plan.interval = 10;
2726
2727 scan_plan.iterations = 0;
2728 params.sched_scan_plans = &scan_plan;
2729 params.sched_scan_plans_num = 1;
2730 }
737e7a08 2731
d0330d57
PK		 2732 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
2733
d3c9c35f
DS		 2734 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
2735 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
2736 params.freqs = wpa_s->manual_sched_scan_freqs;
2737 }
2738
346b333d
SD		 2739 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) &&
2740 wpa_s->wpa_state <= WPA_SCANNING) {
56c76fa5
IP		 2741 params.mac_addr_rand = 1;
2742 if (wpa_s->mac_addr_pno) {
2743 params.mac_addr = wpa_s->mac_addr_pno;
2744 params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN;
2745 }
2746 }
2747
57c3a605 2748 wpa_scan_set_relative_rssi_params(wpa_s, &params);
2749
32c02261 2750 ret = wpa_supplicant_start_sched_scan(wpa_s, &params);
737e7a08
AB		 2751 os_free(params.filter_ssids);
2752 if (ret == 0)
2753 wpa_s->pno = 1;
5e3ddf4d
AB		 2754 else
2755 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
737e7a08
AB		 2756 return ret;
2757}
2758
2759
2760int wpas_stop_pno(struct wpa_supplicant *wpa_s)
2761{
2762 int ret = 0;
2763
5e3ddf4d
AB		 2764 if (!wpa_s->pno)
2765 return 0;
2766
2767 ret = wpa_supplicant_stop_sched_scan(wpa_s);
14f34a73 2768 wpa_s->sched_scan_stop_req = 1;
737e7a08 2769
5e3ddf4d 2770 wpa_s->pno = 0;
737e7a08
AB		 2771 wpa_s->pno_sched_pending = 0;
2772
2773 if (wpa_s->wpa_state == WPA_SCANNING)
2774 wpa_supplicant_req_scan(wpa_s, 0, 0);
2775
2776 return ret;
2777}
56c76fa5
IP		 2778
2779
2780void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
2781 unsigned int type)
2782{
2783 type &= MAC_ADDR_RAND_ALL;
2784 wpa_s->mac_addr_rand_enable &= ~type;
2785
2786 if (type & MAC_ADDR_RAND_SCAN) {
2787 os_free(wpa_s->mac_addr_scan);
2788 wpa_s->mac_addr_scan = NULL;
2789 }
2790
2791 if (type & MAC_ADDR_RAND_SCHED_SCAN) {
2792 os_free(wpa_s->mac_addr_sched_scan);
2793 wpa_s->mac_addr_sched_scan = NULL;
2794 }
2795
2796 if (type & MAC_ADDR_RAND_PNO) {
2797 os_free(wpa_s->mac_addr_pno);
2798 wpa_s->mac_addr_pno = NULL;
2799 }
2800}
2801
2802
2803int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
2804 unsigned int type, const u8 *addr,
2805 const u8 *mask)
2806{
2807 u8 *tmp = NULL;
2808
2809 wpas_mac_addr_rand_scan_clear(wpa_s, type);
2810
2811 if (addr) {
2812 tmp = os_malloc(2 * ETH_ALEN);
2813 if (!tmp)
2814 return -1;
2815 os_memcpy(tmp, addr, ETH_ALEN);
2816 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
2817 }
2818
2819 if (type == MAC_ADDR_RAND_SCAN) {
2820 wpa_s->mac_addr_scan = tmp;
2821 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
2822 wpa_s->mac_addr_sched_scan = tmp;
2823 } else if (type == MAC_ADDR_RAND_PNO) {
2824 wpa_s->mac_addr_pno = tmp;
2825 } else {
2826 wpa_printf(MSG_INFO,
2827 "scan: Invalid MAC randomization type=0x%x",
2828 type);
2829 os_free(tmp);
2830 return -1;
2831 }
2832
2833 wpa_s->mac_addr_rand_enable |= type;
2834 return 0;
2835}
4ead7cfd
KV		 2836
2837
2838int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
2839{
bf88401d
SD		 2840 struct wpa_radio_work *work;
2841 struct wpa_radio *radio = wpa_s->radio;
a8057310 2842
bf88401d
SD		 2843 dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) {
2844 if (work->wpa_s != wpa_s || !work->started ||
2845 (os_strcmp(work->type, "scan") != 0 &&
2846 os_strcmp(work->type, "p2p-scan") != 0))
2847 continue;
4ead7cfd 2848 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
bf88401d 2849 return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie);
4ead7cfd
KV		 2850 }
2851
bf88401d
SD		 2852 wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort");
2853 return -1;
4ead7cfd 2854}
32c02261
AS		 2855
2856
2857int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
2858{
2859 struct sched_scan_plan *scan_plans = NULL;
2860 const char *token, *context = NULL;
2861 unsigned int num = 0;
2862
2863 if (!cmd)
2864 return -1;
2865
bea48f77
JM		 2866 if (!cmd[0]) {
2867 wpa_printf(MSG_DEBUG, "Clear sched scan plans");
2868 os_free(wpa_s->sched_scan_plans);
2869 wpa_s->sched_scan_plans = NULL;
2870 wpa_s->sched_scan_plans_num = 0;
2871 return 0;
2872 }
2873
32c02261
AS		 2874 while ((token = cstr_token(cmd, " ", &context))) {
2875 int ret;
2876 struct sched_scan_plan *scan_plan, *n;
2877
2878 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
2879 if (!n)
2880 goto fail;
2881
2882 scan_plans = n;
2883 scan_plan = &scan_plans[num];
2884 num++;
2885
2886 ret = sscanf(token, "%u:%u", &scan_plan->interval,
2887 &scan_plan->iterations);
2888 if (ret <= 0 || ret > 2 || !scan_plan->interval) {
2889 wpa_printf(MSG_ERROR,
2890 "Invalid sched scan plan input: %s", token);
2891 goto fail;
2892 }
2893
32c02261
AS		 2894 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
2895 wpa_printf(MSG_WARNING,
2896 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
2897 num, scan_plan->interval,
2898 wpa_s->max_sched_scan_plan_interval);
2899 scan_plan->interval =
2900 wpa_s->max_sched_scan_plan_interval;
2901 }
2902
2903 if (ret == 1) {
2904 scan_plan->iterations = 0;
2905 break;
2906 }
2907
2908 if (!scan_plan->iterations) {
2909 wpa_printf(MSG_ERROR,
2910 "scan plan %u: Number of iterations cannot be zero",
2911 num);
2912 goto fail;
2913 }
2914
2915 if (scan_plan->iterations >
2916 wpa_s->max_sched_scan_plan_iterations) {
2917 wpa_printf(MSG_WARNING,
2918 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
2919 num, scan_plan->iterations,
2920 wpa_s->max_sched_scan_plan_iterations);
2921 scan_plan->iterations =
2922 wpa_s->max_sched_scan_plan_iterations;
2923 }
2924
2925 wpa_printf(MSG_DEBUG,
2926 "scan plan %u: interval=%u iterations=%u",
2927 num, scan_plan->interval, scan_plan->iterations);
2928 }
2929
2930 if (!scan_plans) {
2931 wpa_printf(MSG_ERROR, "Invalid scan plans entry");
2932 goto fail;
2933 }
2934
2935 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
2936 wpa_printf(MSG_ERROR,
2937 "All scan plans but the last must specify a number of iterations");
2938 goto fail;
2939 }
2940
2941 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
2942 num, scan_plans[num - 1].interval);
2943
2944 if (num > wpa_s->max_sched_scan_plans) {
2945 wpa_printf(MSG_WARNING,
2946 "Too many scheduled scan plans (only %u supported)",
2947 wpa_s->max_sched_scan_plans);
2948 wpa_printf(MSG_WARNING,
2949 "Use only the first %u scan plans, and the last one (in infinite loop)",
2950 wpa_s->max_sched_scan_plans - 1);
2951 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
2952 &scan_plans[num - 1], sizeof(*scan_plans));
2953 num = wpa_s->max_sched_scan_plans;
2954 }
2955
2956 os_free(wpa_s->sched_scan_plans);
2957 wpa_s->sched_scan_plans = scan_plans;
2958 wpa_s->sched_scan_plans_num = num;
2959
2960 return 0;
2961
2962fail:
2963 os_free(scan_plans);
2964 wpa_printf(MSG_ERROR, "invalid scan plans list");
2965 return -1;
2966}
be7ebd89
MS		 2967
2968
2969/**
2970 * wpas_scan_reset_sched_scan - Reset sched_scan state
2971 * @wpa_s: Pointer to wpa_supplicant data
2972 *
2973 * This function is used to cancel a running scheduled scan and to reset an
2974 * internal scan state to continue with a regular scan on the following
2975 * wpa_supplicant_req_scan() calls.
2976 */
2977void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s)
2978{
2979 wpa_s->normal_scans = 0;
2980 if (wpa_s->sched_scanning) {
2981 wpa_s->sched_scan_timed_out = 0;
2982 wpa_s->prev_sched_ssid = NULL;
2983 wpa_supplicant_cancel_sched_scan(wpa_s);
2984 }
2985}
5bb7327a
JM		 2986
2987
2988void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s)
2989{
2990 /* simulate timeout to restart the sched scan */
2991 wpa_s->sched_scan_timed_out = 1;
2992 wpa_s->prev_sched_ssid = NULL;
2993 wpa_supplicant_cancel_sched_scan(wpa_s);
2994}
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