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[thirdparty/hostap.git] / wpa_supplicant / scan.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA Supplicant - Scanning
ec2e7c4c 3 * Copyright (c) 2003-2019, 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
bb66d467
EC		 82static int wpa_setup_mac_addr_rand_params(struct wpa_driver_scan_params *params,
83 const u8 *mac_addr)
84{
85 u8 *tmp;
86
87 if (params->mac_addr) {
88 params->mac_addr_mask = NULL;
89 os_free(params->mac_addr);
90 params->mac_addr = NULL;
91 }
92
93 params->mac_addr_rand = 1;
94
95 if (!mac_addr)
96 return 0;
97
98 tmp = os_malloc(2 * ETH_ALEN);
99 if (!tmp)
100 return -1;
101
102 os_memcpy(tmp, mac_addr, 2 * ETH_ALEN);
103 params->mac_addr = tmp;
104 params->mac_addr_mask = tmp + ETH_ALEN;
105 return 0;
106}
107
108
2c09af30
JM		 109/**
110 * wpa_supplicant_enabled_networks - Check whether there are enabled networks
111 * @wpa_s: Pointer to wpa_supplicant data
112 * Returns: 0 if no networks are enabled, >0 if networks are enabled
113 *
114 * This function is used to figure out whether any networks (or Interworking
115 * with enabled credentials and auto_interworking) are present in the current
116 * configuration.
117 */
349493bd 118int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
e76baaac 119{
349493bd 120 struct wpa_ssid *ssid = wpa_s->conf->ssid;
d4534bde 121 int count = 0, disabled = 0;
44b9ea5b
JM		 122
123 if (wpa_s->p2p_mgmt)
124 return 0; /* no normal network profiles on p2p_mgmt interface */
125
e76baaac 126 while (ssid) {
349493bd 127 if (!wpas_network_disabled(wpa_s, ssid))
5471c343 128 count++;
d4534bde
JM		 129 else
130 disabled++;
e76baaac
JM		 131 ssid = ssid->next;
132 }
4d5bda5f
JM		 133 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
134 wpa_s->conf->auto_interworking)
135 count++;
d4534bde
JM		 136 if (count == 0 && disabled > 0) {
137 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
138 "networks)", disabled);
139 }
5471c343 140 return count;
e76baaac
JM		 141}
142
143
144static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
145 struct wpa_ssid *ssid)
146{
3d5f0e91
ST		 147 int min_temp_disabled = 0;
148
e76baaac 149 while (ssid) {
3d5f0e91
ST		 150 if (!wpas_network_disabled(wpa_s, ssid)) {
151 int temp_disabled = wpas_temp_disabled(wpa_s, ssid);
152
153 if (temp_disabled <= 0)
154 break;
155
156 if (!min_temp_disabled ||
157 temp_disabled < min_temp_disabled)
158 min_temp_disabled = temp_disabled;
159 }
e76baaac
JM		 160 ssid = ssid->next;
161 }
162
163 /* ap_scan=2 mode - try to associate with each SSID. */
164 if (ssid == NULL) {
f049052b
BG		 165 wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
166 "end of scan list - go back to beginning");
ba2a573c 167 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
3d5f0e91 168 wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0);
e76baaac
JM		 169 return;
170 }
171 if (ssid->next) {
172 /* Continue from the next SSID on the next attempt. */
173 wpa_s->prev_scan_ssid = ssid;
174 } else {
175 /* Start from the beginning of the SSID list. */
ba2a573c 176 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
e76baaac
JM		 177 }
178 wpa_supplicant_associate(wpa_s, NULL, ssid);
179}
180
181
d12a51b5 182static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
60b94c98 183{
d12a51b5
JM		 184 struct wpa_supplicant *wpa_s = work->wpa_s;
185 struct wpa_driver_scan_params *params = work->ctx;
60b94c98
JM		 186 int ret;
187
d12a51b5 188 if (deinit) {
b3253ebb
AO		 189 if (!work->started) {
190 wpa_scan_free_params(params);
191 return;
192 }
193 wpa_supplicant_notify_scanning(wpa_s, 0);
194 wpas_notify_scan_done(wpa_s, 0);
195 wpa_s->scan_work = NULL;
d12a51b5
JM		 196 return;
197 }
198
9fde1460
EC		 199 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) &&
200 wpa_s->wpa_state <= WPA_SCANNING)
201 wpa_setup_mac_addr_rand_params(params, wpa_s->mac_addr_scan);
202
c267753b
JM		 203 if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
204 wpa_msg(wpa_s, MSG_INFO,
205 "Failed to assign random MAC address for a scan");
6dc3206e
JM		 206 wpa_scan_free_params(params);
207 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
c267753b
JM		 208 radio_work_done(work);
209 return;
210 }
211
60b94c98
JM		 212 wpa_supplicant_notify_scanning(wpa_s, 1);
213
2dbe63ad
JM		 214 if (wpa_s->clear_driver_scan_cache) {
215 wpa_printf(MSG_DEBUG,
216 "Request driver to clear scan cache due to local BSS flush");
949938aa 217 params->only_new_results = 1;
2dbe63ad 218 }
17fbb751 219 ret = wpa_drv_scan(wpa_s, params);
bf88401d
SD		 220 /*
221 * Store the obtained vendor scan cookie (if any) in wpa_s context.
222 * The current design is to allow only one scan request on each
223 * interface, hence having this scan cookie stored in wpa_s context is
224 * fine for now.
225 *
226 * Revisit this logic if concurrent scan operations per interface
227 * is supported.
228 */
229 if (ret == 0)
230 wpa_s->curr_scan_cookie = params->scan_cookie;
d12a51b5
JM		 231 wpa_scan_free_params(params);
232 work->ctx = NULL;
60b94c98 233 if (ret) {
3756acfd
AS		 234 int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
235 !wpa_s->beacon_rep_data.token;
2d9c99e3
JM		 236
237 if (wpa_s->disconnected)
238 retry = 0;
239
60b94c98
JM		 240 wpa_supplicant_notify_scanning(wpa_s, 0);
241 wpas_notify_scan_done(wpa_s, 0);
2d9c99e3
JM		 242 if (wpa_s->wpa_state == WPA_SCANNING)
243 wpa_supplicant_set_state(wpa_s,
244 wpa_s->scan_prev_wpa_state);
245 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s",
246 ret, retry ? " retry=1" : "");
d12a51b5 247 radio_work_done(work);
2d9c99e3
JM		 248
249 if (retry) {
250 /* Restore scan_req since we will try to scan again */
251 wpa_s->scan_req = wpa_s->last_scan_req;
252 wpa_supplicant_req_scan(wpa_s, 1, 0);
57d3c591
HW		 253 } else if (wpa_s->scan_res_handler) {
254 /* Clear the scan_res_handler */
255 wpa_s->scan_res_handler = NULL;
2d9c99e3 256 }
3756acfd
AS		 257
258 if (wpa_s->beacon_rep_data.token)
259 wpas_rrm_refuse_request(wpa_s);
260
d12a51b5 261 return;
0b7a25c0 262 }
60b94c98 263
d12a51b5
JM		 264 os_get_reltime(&wpa_s->scan_trigger_time);
265 wpa_s->scan_runs++;
266 wpa_s->normal_scans++;
267 wpa_s->own_scan_requested = 1;
268 wpa_s->clear_driver_scan_cache = 0;
269 wpa_s->scan_work = work;
270}
271
272
273/**
274 * wpa_supplicant_trigger_scan - Request driver to start a scan
275 * @wpa_s: Pointer to wpa_supplicant data
276 * @params: Scan parameters
277 * Returns: 0 on success, -1 on failure
278 */
279int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
280 struct wpa_driver_scan_params *params)
281{
282 struct wpa_driver_scan_params *ctx;
283
284 if (wpa_s->scan_work) {
285 wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
286 return -1;
287 }
288
289 ctx = wpa_scan_clone_params(params);
f37d8a4d
JM		 290 if (!ctx ||
291 radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
d12a51b5
JM		 292 {
293 wpa_scan_free_params(ctx);
6dc3206e 294 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
d12a51b5
JM		 295 return -1;
296 }
297
298 return 0;
60b94c98
JM		 299}
300
301
6a90053c
LC		 302static void
303wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
304{
305 struct wpa_supplicant *wpa_s = eloop_ctx;
306
307 wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");
308
309 if (wpa_supplicant_req_sched_scan(wpa_s))
310 wpa_supplicant_req_scan(wpa_s, 0, 0);
311}
312
313
cbdf3507
LC		 314static void
315wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
316{
317 struct wpa_supplicant *wpa_s = eloop_ctx;
318
319 wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");
320
321 wpa_s->sched_scan_timed_out = 1;
322 wpa_supplicant_cancel_sched_scan(wpa_s);
323}
324
325
0f346657
JM		 326static int
327wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
328 struct wpa_driver_scan_params *params)
cbdf3507
LC		 329{
330 int ret;
331
cbdf3507 332 wpa_supplicant_notify_scanning(wpa_s, 1);
09ea4309 333 ret = wpa_drv_sched_scan(wpa_s, params);
cbdf3507
LC		 334 if (ret)
335 wpa_supplicant_notify_scanning(wpa_s, 0);
336 else
337 wpa_s->sched_scanning = 1;
338
339 return ret;
340}
341
342
0f346657 343static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
cbdf3507
LC		 344{
345 int ret;
346
347 ret = wpa_drv_stop_sched_scan(wpa_s);
348 if (ret) {
349 wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!");
350 /* TODO: what to do if stopping fails? */
351 return -1;
352 }
353
354 return ret;
355}
356
357
3812464c
JM		 358static struct wpa_driver_scan_filter *
359wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids)
360{
361 struct wpa_driver_scan_filter *ssids;
362 struct wpa_ssid *ssid;
363 size_t count;
364
365 *num_ssids = 0;
366 if (!conf->filter_ssids)
367 return NULL;
368
369 for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) {
370 if (ssid->ssid && ssid->ssid_len)
371 count++;
372 }
373 if (count == 0)
374 return NULL;
faebdeaa 375 ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter));
3812464c
JM		 376 if (ssids == NULL)
377 return NULL;
378
379 for (ssid = conf->ssid; ssid; ssid = ssid->next) {
380 if (!ssid->ssid || !ssid->ssid_len)
381 continue;
382 os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len);
383 ssids[*num_ssids].ssid_len = ssid->ssid_len;
384 (*num_ssids)++;
385 }
386
387 return ssids;
388}
389
390
5f738a21
LC		 391static void wpa_supplicant_optimize_freqs(
392 struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params)
393{
394#ifdef CONFIG_P2P
395 if (params->freqs == NULL && wpa_s->p2p_in_provisioning &&
396 wpa_s->go_params) {
397 /* Optimize provisioning state scan based on GO information */
398 if (wpa_s->p2p_in_provisioning < 5 &&
399 wpa_s->go_params->freq > 0) {
400 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
401 "preferred frequency %d MHz",
402 wpa_s->go_params->freq);
faebdeaa 403 params->freqs = os_calloc(2, sizeof(int));
5f738a21
LC		 404 if (params->freqs)
405 params->freqs[0] = wpa_s->go_params->freq;
406 } else if (wpa_s->p2p_in_provisioning < 8 &&
407 wpa_s->go_params->freq_list[0]) {
408 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
409 "channels");
410 int_array_concat(&params->freqs,
411 wpa_s->go_params->freq_list);
412 if (params->freqs)
413 int_array_sort_unique(params->freqs);
414 }
415 wpa_s->p2p_in_provisioning++;
416 }
41d5ce9e
RR		 417
418 if (params->freqs == NULL && wpa_s->p2p_in_invitation) {
419 /*
420 * Optimize scan based on GO information during persistent
421 * group reinvocation
422 */
28fa4eb2 423 if (wpa_s->p2p_in_invitation < 5 &&
41d5ce9e
RR		 424 wpa_s->p2p_invite_go_freq > 0) {
425 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation",
426 wpa_s->p2p_invite_go_freq);
faebdeaa 427 params->freqs = os_calloc(2, sizeof(int));
41d5ce9e
RR		 428 if (params->freqs)
429 params->freqs[0] = wpa_s->p2p_invite_go_freq;
430 }
431 wpa_s->p2p_in_invitation++;
432 if (wpa_s->p2p_in_invitation > 20) {
433 /*
434 * This should not really happen since the variable is
435 * cleared on group removal, but if it does happen, make
436 * sure we do not get stuck in special invitation scan
437 * mode.
438 */
439 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation");
440 wpa_s->p2p_in_invitation = 0;
441 }
442 }
5f738a21
LC		 443#endif /* CONFIG_P2P */
444
445#ifdef CONFIG_WPS
446 if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
447 /*
448 * Optimize post-provisioning scan based on channel used
449 * during provisioning.
450 */
451 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
452 "that was used during provisioning", wpa_s->wps_freq);
faebdeaa 453 params->freqs = os_calloc(2, sizeof(int));
5f738a21
LC		 454 if (params->freqs)
455 params->freqs[0] = wpa_s->wps_freq;
456 wpa_s->after_wps--;
662b40b1
JM		 457 } else if (wpa_s->after_wps)
458 wpa_s->after_wps--;
5f738a21 459
1e7fb4f1
JM		 460 if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
461 {
462 /* Optimize provisioning scan based on already known channel */
463 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",
464 wpa_s->wps_freq);
faebdeaa 465 params->freqs = os_calloc(2, sizeof(int));
1e7fb4f1
JM		 466 if (params->freqs)
467 params->freqs[0] = wpa_s->wps_freq;
468 wpa_s->known_wps_freq = 0; /* only do this once */
469 }
5f738a21
LC		 470#endif /* CONFIG_WPS */
471}
472
473
46ee0427
JM		 474#ifdef CONFIG_INTERWORKING
475static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
476 struct wpabuf *buf)
477{
46ee0427
JM		 478 wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
479 wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
480 1 + ETH_ALEN);
11540c0b 481 wpabuf_put_u8(buf, wpa_s->conf->access_network_type);
46ee0427
JM		 482 /* No Venue Info */
483 if (!is_zero_ether_addr(wpa_s->conf->hessid))
484 wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN);
485}
486#endif /* CONFIG_INTERWORKING */
487
488
2ac43334
RZ		 489#ifdef CONFIG_MBO
490static void wpas_fils_req_param_add_max_channel(struct wpa_supplicant *wpa_s,
491 struct wpabuf **ie)
492{
493 if (wpabuf_resize(ie, 5)) {
494 wpa_printf(MSG_DEBUG,
495 "Failed to allocate space for FILS Request Parameters element");
496 return;
497 }
498
499 /* FILS Request Parameters element */
500 wpabuf_put_u8(*ie, WLAN_EID_EXTENSION);
501 wpabuf_put_u8(*ie, 3); /* FILS Request attribute length */
502 wpabuf_put_u8(*ie, WLAN_EID_EXT_FILS_REQ_PARAMS);
503 /* Parameter control bitmap */
504 wpabuf_put_u8(*ie, 0);
505 /* Max Channel Time field - contains the value of MaxChannelTime
506 * parameter of the MLME-SCAN.request primitive represented in units of
507 * TUs, as an unsigned integer. A Max Channel Time field value of 255
508 * is used to indicate any duration of more than 254 TUs, or an
509 * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178)
510 */
511 wpabuf_put_u8(*ie, 255);
512}
513#endif /* CONFIG_MBO */
514
515
cc9985d1 516void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s)
517{
518 struct wpabuf *default_ies = NULL;
519 u8 ext_capab[18];
520 int ext_capab_len;
521 enum wpa_driver_if_type type = WPA_IF_STATION;
522
523#ifdef CONFIG_P2P
524 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
525 type = WPA_IF_P2P_CLIENT;
526#endif /* CONFIG_P2P */
527
528 wpa_drv_get_ext_capa(wpa_s, type);
529
530 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
531 sizeof(ext_capab));
532 if (ext_capab_len > 0 &&
533 wpabuf_resize(&default_ies, ext_capab_len) == 0)
534 wpabuf_put_data(default_ies, ext_capab, ext_capab_len);
535
536#ifdef CONFIG_MBO
2ac43334
RZ		 537 if (wpa_s->enable_oce & OCE_STA)
538 wpas_fils_req_param_add_max_channel(wpa_s, &default_ies);
332aadb8
AP		 539 /* Send MBO and OCE capabilities */
540 if (wpabuf_resize(&default_ies, 12) == 0)
cc9985d1 541 wpas_mbo_scan_ie(wpa_s, default_ies);
542#endif /* CONFIG_MBO */
543
544 if (default_ies)
545 wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies),
546 wpabuf_len(default_ies));
547 wpabuf_free(default_ies);
548}
549
550
a13e07ec 551static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
6fc6879b 552{
46ee0427 553 struct wpabuf *extra_ie = NULL;
ad443097
IP		 554 u8 ext_capab[18];
555 int ext_capab_len;
b01c18a8 556#ifdef CONFIG_WPS
509a3972 557 int wps = 0;
f90c86d4 558 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
46ee0427
JM		 559#endif /* CONFIG_WPS */
560
cc9a2575
KV		 561#ifdef CONFIG_P2P
562 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
563 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
564 else
565#endif /* CONFIG_P2P */
566 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
567
ad443097
IP		 568 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
569 sizeof(ext_capab));
570 if (ext_capab_len > 0 &&
571 wpabuf_resize(&extra_ie, ext_capab_len) == 0)
572 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
573
46ee0427
JM		 574#ifdef CONFIG_INTERWORKING
575 if (wpa_s->conf->interworking &&
576 wpabuf_resize(&extra_ie, 100) == 0)
577 wpas_add_interworking_elements(wpa_s, extra_ie);
578#endif /* CONFIG_INTERWORKING */
5f738a21 579
2ac43334
RZ		 580#ifdef CONFIG_MBO
581 if (wpa_s->enable_oce & OCE_STA)
582 wpas_fils_req_param_add_max_channel(wpa_s, &extra_ie);
583#endif /* CONFIG_MBO */
584
46ee0427 585#ifdef CONFIG_WPS
5f738a21
LC		 586 wps = wpas_wps_in_use(wpa_s, &req_type);
587
588 if (wps) {
46ee0427 589 struct wpabuf *wps_ie;
360182ed
JM		 590 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
591 DEV_PW_DEFAULT,
592 &wpa_s->wps->dev,
5f738a21
LC		 593 wpa_s->wps->uuid, req_type,
594 0, NULL);
595 if (wps_ie) {
46ee0427
JM		 596 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
597 wpabuf_put_buf(extra_ie, wps_ie);
598 wpabuf_free(wps_ie);
5f738a21
LC		 599 }
600 }
601
602#ifdef CONFIG_P2P
46ee0427 603 if (wps) {
5f738a21 604 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
46ee0427
JM		 605 if (wpabuf_resize(&extra_ie, ielen) == 0)
606 wpas_p2p_scan_ie(wpa_s, extra_ie);
5f738a21
LC		 607 }
608#endif /* CONFIG_P2P */
609
fbca4c89
JA		 610 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
611
b01c18a8 612#endif /* CONFIG_WPS */
5f738a21 613
0f105f9e 614#ifdef CONFIG_HS20
9ce2015a 615 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 9) == 0)
ec2cf403 616 wpas_hs20_add_indication(extra_ie, -1, 0);
0f105f9e
JM		 617#endif /* CONFIG_HS20 */
618
b36a3a65
AN		 619#ifdef CONFIG_FST
620 if (wpa_s->fst_ies &&
621 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
622 wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
623#endif /* CONFIG_FST */
624
c5d193d7 625#ifdef CONFIG_MBO
332aadb8
AP		 626 /* Send MBO and OCE capabilities */
627 if (wpabuf_resize(&extra_ie, 12) == 0)
c5d193d7
DS		 628 wpas_mbo_scan_ie(wpa_s, extra_ie);
629#endif /* CONFIG_MBO */
630
61c10118
JM		 631 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
632 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
633
634 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
635 wpabuf_put_buf(extra_ie, buf);
636 }
637
46ee0427 638 return extra_ie;
5f738a21
LC		 639}
640
641
5cc70322
JM		 642#ifdef CONFIG_P2P
643
644/*
645 * Check whether there are any enabled networks or credentials that could be
646 * used for a non-P2P connection.
647 */
648static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
649{
650 struct wpa_ssid *ssid;
651
652 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
653 if (wpas_network_disabled(wpa_s, ssid))
654 continue;
655 if (!ssid->p2p_group)
656 return 1;
657 }
658
659 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
660 wpa_s->conf->auto_interworking)
661 return 1;
662
663 return 0;
664}
665
6124e858 666#endif /* CONFIG_P2P */
5cc70322 667
5cc70322 668
faf9a858
JM		 669static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
670 enum hostapd_hw_mode band,
d0e116f6
VK		 671 struct wpa_driver_scan_params *params,
672 int is_6ghz)
faf9a858
JM		 673{
674 /* Include only supported channels for the specified band */
675 struct hostapd_hw_modes *mode;
676 int count, i;
677
d0e116f6 678 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band, is_6ghz);
faf9a858
JM		 679 if (mode == NULL) {
680 /* No channels supported in this band - use empty list */
681 params->freqs = os_zalloc(sizeof(int));
682 return;
683 }
684
faebdeaa 685 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
faf9a858
JM		 686 if (params->freqs == NULL)
687 return;
688 for (count = 0, i = 0; i < mode->num_channels; i++) {
689 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
690 continue;
691 params->freqs[count++] = mode->channels[i].freq;
692 }
693}
694
695
696static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
697 struct wpa_driver_scan_params *params)
698{
699 if (wpa_s->hw.modes == NULL)
700 return; /* unknown what channels the driver supports */
701 if (params->freqs)
702 return; /* already using a limited channel set */
703 if (wpa_s->setband == WPA_SETBAND_5G)
704 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A,
d0e116f6 705 params, 0);
faf9a858
JM		 706 else if (wpa_s->setband == WPA_SETBAND_2G)
707 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G,
d0e116f6 708 params, 0);
faf9a858
JM		 709}
710
711
c04562e6
IP		 712static void wpa_add_scan_ssid(struct wpa_supplicant *wpa_s,
713 struct wpa_driver_scan_params *params,
714 size_t max_ssids, const u8 *ssid, size_t ssid_len)
715{
716 unsigned int j;
717
718 for (j = 0; j < params->num_ssids; j++) {
719 if (params->ssids[j].ssid_len == ssid_len &&
720 params->ssids[j].ssid &&
721 os_memcmp(params->ssids[j].ssid, ssid, ssid_len) == 0)
722 return; /* already in the list */
723 }
724
725 if (params->num_ssids + 1 > max_ssids) {
726 wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request");
727 return;
728 }
729
730 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
731 wpa_ssid_txt(ssid, ssid_len));
732
733 params->ssids[params->num_ssids].ssid = ssid;
734 params->ssids[params->num_ssids].ssid_len = ssid_len;
735 params->num_ssids++;
736}
737
738
739static void wpa_add_owe_scan_ssid(struct wpa_supplicant *wpa_s,
740 struct wpa_driver_scan_params *params,
741 struct wpa_ssid *ssid, size_t max_ssids)
742{
743#ifdef CONFIG_OWE
744 struct wpa_bss *bss;
745
746 if (!(ssid->key_mgmt & WPA_KEY_MGMT_OWE))
747 return;
748
749 wpa_printf(MSG_DEBUG, "OWE: Look for transition mode AP. ssid=%s",
750 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
751
752 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
753 const u8 *owe, *pos, *end;
754 const u8 *owe_ssid;
755 size_t owe_ssid_len;
756
757 if (bss->ssid_len != ssid->ssid_len ||
758 os_memcmp(bss->ssid, ssid->ssid, ssid->ssid_len) != 0)
759 continue;
760
761 owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE);
762 if (!owe || owe[1] < 4)
763 continue;
764
765 pos = owe + 6;
766 end = owe + 2 + owe[1];
767
768 /* Must include BSSID and ssid_len */
769 if (end - pos < ETH_ALEN + 1)
770 return;
771
772 /* Skip BSSID */
773 pos += ETH_ALEN;
774 owe_ssid_len = *pos++;
775 owe_ssid = pos;
776
777 if ((size_t) (end - pos) < owe_ssid_len ||
778 owe_ssid_len > SSID_MAX_LEN)
779 return;
780
781 wpa_printf(MSG_DEBUG,
782 "OWE: scan_ssids: transition mode OWE ssid=%s",
783 wpa_ssid_txt(owe_ssid, owe_ssid_len));
784
785 wpa_add_scan_ssid(wpa_s, params, max_ssids,
786 owe_ssid, owe_ssid_len);
787 return;
788 }
789#endif /* CONFIG_OWE */
790}
791
792
6891f0e6
LJ		 793static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
794 struct wpa_driver_scan_params *params,
795 size_t max_ssids)
796{
797 unsigned int i;
798 struct wpa_ssid *ssid;
799
ef60f643
RP		 800 /*
801 * For devices with max_ssids greater than 1, leave the last slot empty
802 * for adding the wildcard scan entry.
803 */
804 max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids;
805
6891f0e6 806 for (i = 0; i < wpa_s->scan_id_count; i++) {
6891f0e6 807 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
c04562e6 808 if (!ssid)
6891f0e6 809 continue;
c04562e6
IP		 810 if (ssid->scan_ssid)
811 wpa_add_scan_ssid(wpa_s, params, max_ssids,
812 ssid->ssid, ssid->ssid_len);
813 /*
814 * Also add the SSID of the OWE BSS, to allow discovery of
815 * transition mode APs more quickly.
816 */
817 wpa_add_owe_scan_ssid(wpa_s, params, ssid, max_ssids);
6891f0e6
LJ		 818 }
819
820 wpa_s->scan_id_count = 0;
821}
822
823
a80651d0
KV		 824static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
825 struct wpa_driver_scan_params *params,
826 size_t max_ssids)
827{
828 unsigned int i;
829
830 if (wpa_s->ssids_from_scan_req == NULL ||
831 wpa_s->num_ssids_from_scan_req == 0)
832 return 0;
833
834 if (wpa_s->num_ssids_from_scan_req > max_ssids) {
835 wpa_s->num_ssids_from_scan_req = max_ssids;
836 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
837 (unsigned int) max_ssids);
838 }
839
840 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
841 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
842 params->ssids[i].ssid_len =
843 wpa_s->ssids_from_scan_req[i].ssid_len;
844 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
845 params->ssids[i].ssid,
846 params->ssids[i].ssid_len);
847 }
848
849 params->num_ssids = wpa_s->num_ssids_from_scan_req;
850 wpa_s->num_ssids_from_scan_req = 0;
851 return 1;
852}
853
854
5f738a21
LC		 855static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
856{
857 struct wpa_supplicant *wpa_s = eloop_ctx;
858 struct wpa_ssid *ssid;
49e3eea8 859 int ret, p2p_in_prog;
b9b12d02 860 struct wpabuf *extra_ie = NULL;
e76baaac 861 struct wpa_driver_scan_params params;
7c865c68 862 struct wpa_driver_scan_params *scan_params;
e76baaac 863 size_t max_ssids;
3f9ebc43 864 int connect_without_scan = 0;
6fc6879b 865
6e374bd4
JM		 866 wpa_s->ignore_post_flush_scan_res = 0;
867
8401a6b0 868 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
f049052b 869 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
8401a6b0
JM		 870 return;
871 }
872
4115303b 873 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
ac06fb12 874 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
3180d7a2 875 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
6fc6879b 876 return;
3180d7a2 877 }
6fc6879b 878
f86d282f
JJ		 879 if (wpa_s->scanning) {
880 /*
881 * If we are already in scanning state, we shall reschedule the
882 * the incoming scan request.
883 */
884 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
885 wpa_supplicant_req_scan(wpa_s, 1, 0);
886 return;
887 }
888
349493bd 889 if (!wpa_supplicant_enabled_networks(wpa_s) &&
4115303b 890 wpa_s->scan_req == NORMAL_SCAN_REQ) {
f049052b 891 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
6fc6879b
JM		 892 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
893 return;
894 }
6fc6879b 895
c2a04078
JM		 896 if (wpa_s->conf->ap_scan != 0 &&
897 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
f049052b
BG		 898 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
899 "overriding ap_scan configuration");
6fc6879b 900 wpa_s->conf->ap_scan = 0;
8bac466b 901 wpas_notify_ap_scan_changed(wpa_s);
6fc6879b
JM		 902 }
903
904 if (wpa_s->conf->ap_scan == 0) {
905 wpa_supplicant_gen_assoc_event(wpa_s);
906 return;
907 }
908
3f9ebc43 909 ssid = NULL;
a51c40aa 910 if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
3f9ebc43
JM		 911 wpa_s->connect_without_scan) {
912 connect_without_scan = 1;
913 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
914 if (ssid == wpa_s->connect_without_scan)
915 break;
916 }
917 }
918
49e3eea8 919 p2p_in_prog = wpas_p2p_in_progress(wpa_s);
3f9ebc43
JM		 920 if (p2p_in_prog && p2p_in_prog != 2 &&
921 (!ssid ||
922 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
1b5d4714
JM		 923 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
924 wpa_supplicant_req_scan(wpa_s, 5, 0);
925 return;
303f60d3 926 }
303f60d3 927
57f93d68
AN		 928 /*
929 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are
930 * used for changing modes inside wpa_supplicant (roaming,
931 * auto-reconnect, etc). Discarding the scan might hurt these processes.
932 * The normal use case for PNO is to suspend the host immediately after
933 * starting PNO, so the periodic 100 ms attempts to run the scan do not
934 * normally happen in practice multiple times, i.e., this is simply
935 * restarting scanning once the host is woken up and PNO stopped.
936 */
937 if (wpa_s->pno || wpa_s->pno_sched_pending) {
938 wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress");
939 wpa_supplicant_req_scan(wpa_s, 0, 100000);
940 return;
941 }
942
17fbb751 943 if (wpa_s->conf->ap_scan == 2)
e76baaac
JM		 944 max_ssids = 1;
945 else {
946 max_ssids = wpa_s->max_scan_ssids;
947 if (max_ssids > WPAS_MAX_SCAN_SSIDS)
948 max_ssids = WPAS_MAX_SCAN_SSIDS;
949 }
950
12455031 951 wpa_s->last_scan_req = wpa_s->scan_req;
4115303b 952 wpa_s->scan_req = NORMAL_SCAN_REQ;
e76baaac 953
3f9ebc43
JM		 954 if (connect_without_scan) {
955 wpa_s->connect_without_scan = NULL;
956 if (ssid) {
957 wpa_printf(MSG_DEBUG, "Start a pre-selected network "
958 "without scan step");
959 wpa_supplicant_associate(wpa_s, NULL, ssid);
960 return;
961 }
962 }
963
e76baaac
JM		 964 os_memset(&params, 0, sizeof(params));
965
2d9c99e3 966 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
6fc6879b
JM		 967 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
968 wpa_s->wpa_state == WPA_INACTIVE)
969 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
970
7c865c68
TB		 971 /*
972 * If autoscan has set its own scanning parameters
973 */
974 if (wpa_s->autoscan_params != NULL) {
975 scan_params = wpa_s->autoscan_params;
976 goto scan;
977 }
978
a80651d0
KV		 979 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
980 wpa_set_ssids_from_scan_req(wpa_s, &params, max_ssids)) {
981 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
982 goto ssid_list_set;
983 }
984
a21c05db 985#ifdef CONFIG_P2P
85ea132a 986 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
c35e35ed 987 wpa_s->go_params && !wpa_s->conf->passive_scan) {
9100b660
JM		 988 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
989 wpa_s->p2p_in_provisioning,
990 wpa_s->show_group_started);
a21c05db
JM		 991 params.ssids[0].ssid = wpa_s->go_params->ssid;
992 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
993 params.num_ssids = 1;
994 goto ssid_list_set;
995 }
41d5ce9e
RR		 996
997 if (wpa_s->p2p_in_invitation) {
998 if (wpa_s->current_ssid) {
999 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
1000 params.ssids[0].ssid = wpa_s->current_ssid->ssid;
1001 params.ssids[0].ssid_len =
1002 wpa_s->current_ssid->ssid_len;
1003 params.num_ssids = 1;
1004 } else {
1005 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
1006 }
1007 goto ssid_list_set;
1008 }
a21c05db
JM		 1009#endif /* CONFIG_P2P */
1010
e76baaac 1011 /* Find the starting point from which to continue scanning */
6fc6879b 1012 ssid = wpa_s->conf->ssid;
ba2a573c 1013 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
6fc6879b
JM		 1014 while (ssid) {
1015 if (ssid == wpa_s->prev_scan_ssid) {
1016 ssid = ssid->next;
1017 break;
1018 }
1019 ssid = ssid->next;
1020 }
1021 }
6fc6879b 1022
12455031 1023 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
0a34b62b
JM		 1024#ifdef CONFIG_AP
1025 !wpa_s->ap_iface &&
1026#endif /* CONFIG_AP */
12455031 1027 wpa_s->conf->ap_scan == 2) {
7dcdcfd6 1028 wpa_s->connect_without_scan = NULL;
b3aa456b 1029 wpa_s->prev_scan_wildcard = 0;
e76baaac
JM		 1030 wpa_supplicant_assoc_try(wpa_s, ssid);
1031 return;
1032 } else if (wpa_s->conf->ap_scan == 2) {
6fc6879b 1033 /*
ba2a573c
JM		 1034 * User-initiated scan request in ap_scan == 2; scan with
1035 * wildcard SSID.
6fc6879b 1036 */
e76baaac 1037 ssid = NULL;
0f44ec8e
PQ		 1038 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
1039 /*
1040 * Perform single-channel single-SSID scan for
1041 * reassociate-to-same-BSS operation.
1042 */
1043 /* Setup SSID */
1044 ssid = wpa_s->current_ssid;
1045 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1046 ssid->ssid, ssid->ssid_len);
1047 params.ssids[0].ssid = ssid->ssid;
1048 params.ssids[0].ssid_len = ssid->ssid_len;
1049 params.num_ssids = 1;
1050
1051 /*
1052 * Allocate memory for frequency array, allocate one extra
1053 * slot for the zero-terminator.
1054 */
1055 params.freqs = os_malloc(sizeof(int) * 2);
8e909fa9
JM		 1056 if (params.freqs) {
1057 params.freqs[0] = wpa_s->assoc_freq;
1058 params.freqs[1] = 0;
0f44ec8e 1059 }
0f44ec8e
PQ		 1060
1061 /*
1062 * Reset the reattach flag so that we fall back to full scan if
1063 * this scan fails.
1064 */
1065 wpa_s->reattach = 0;
e76baaac 1066 } else {
5be45e2e 1067 struct wpa_ssid *start = ssid, *tssid;
d3a98225 1068 int freqs_set = 0;
e76baaac
JM		 1069 if (ssid == NULL && max_ssids > 1)
1070 ssid = wpa_s->conf->ssid;
1071 while (ssid) {
349493bd
JM		 1072 if (!wpas_network_disabled(wpa_s, ssid) &&
1073 ssid->scan_ssid) {
e76baaac
JM		 1074 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1075 ssid->ssid, ssid->ssid_len);
1076 params.ssids[params.num_ssids].ssid =
1077 ssid->ssid;
1078 params.ssids[params.num_ssids].ssid_len =
1079 ssid->ssid_len;
1080 params.num_ssids++;
1081 if (params.num_ssids + 1 >= max_ssids)
1082 break;
1083 }
c04562e6
IP		 1084
1085 if (!wpas_network_disabled(wpa_s, ssid)) {
1086 /*
1087 * Also add the SSID of the OWE BSS, to allow
1088 * discovery of transition mode APs more
1089 * quickly.
1090 */
1091 wpa_add_owe_scan_ssid(wpa_s, &params, ssid,
1092 max_ssids);
1093 }
1094
e76baaac
JM		 1095 ssid = ssid->next;
1096 if (ssid == start)
1097 break;
1098 if (ssid == NULL && max_ssids > 1 &&
1099 start != wpa_s->conf->ssid)
1100 ssid = wpa_s->conf->ssid;
6fc6879b 1101 }
d3a98225 1102
6891f0e6
LJ		 1103 if (wpa_s->scan_id_count &&
1104 wpa_s->last_scan_req == MANUAL_SCAN_REQ)
1105 wpa_set_scan_ssids(wpa_s, &params, max_ssids);
1106
0855e2e1
JM		 1107 for (tssid = wpa_s->conf->ssid;
1108 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
1109 tssid = tssid->next) {
349493bd 1110 if (wpas_network_disabled(wpa_s, tssid))
d3a98225 1111 continue;
b967b5e8
JM		 1112 if (((params.freqs || !freqs_set) &&
1113 tssid->scan_freq) &&
1114 int_array_len(params.freqs) < 100) {
d3a98225 1115 int_array_concat(&params.freqs,
5be45e2e 1116 tssid->scan_freq);
d3a98225
JM		 1117 } else {
1118 os_free(params.freqs);
1119 params.freqs = NULL;
1120 }
1121 freqs_set = 1;
1122 }
1123 int_array_sort_unique(params.freqs);
6fc6879b
JM		 1124 }
1125
b3aa456b
ES		 1126 if (ssid && max_ssids == 1) {
1127 /*
1128 * If the driver is limited to 1 SSID at a time interleave
1129 * wildcard SSID scans with specific SSID scans to avoid
1130 * waiting a long time for a wildcard scan.
1131 */
1132 if (!wpa_s->prev_scan_wildcard) {
1133 params.ssids[0].ssid = NULL;
1134 params.ssids[0].ssid_len = 0;
1135 wpa_s->prev_scan_wildcard = 1;
1136 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
1137 "wildcard SSID (Interleave with specific)");
1138 } else {
1139 wpa_s->prev_scan_ssid = ssid;
1140 wpa_s->prev_scan_wildcard = 0;
1141 wpa_dbg(wpa_s, MSG_DEBUG,
1142 "Starting AP scan for specific SSID: %s",
1143 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
e76baaac 1144 }
b3aa456b
ES		 1145 } else if (ssid) {
1146 /* max_ssids > 1 */
1147
1148 wpa_s->prev_scan_ssid = ssid;
1149 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
1150 "the scan request");
1151 params.num_ssids++;
88c2d488
JM		 1152 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1153 wpa_s->manual_scan_passive && params.num_ssids == 0) {
1154 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
c35e35ed
JM		 1155 } else if (wpa_s->conf->passive_scan) {
1156 wpa_dbg(wpa_s, MSG_DEBUG,
1157 "Use passive scan based on configuration");
e76baaac 1158 } else {
ba2a573c 1159 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
e76baaac 1160 params.num_ssids++;
f049052b
BG		 1161 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
1162 "SSID");
6fc6879b
JM		 1163 }
1164
a80651d0 1165ssid_list_set:
5f738a21 1166 wpa_supplicant_optimize_freqs(wpa_s, &params);
a13e07ec 1167 extra_ie = wpa_supplicant_extra_ies(wpa_s);
0e65037c 1168
949938aa 1169 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2dbe63ad
JM		 1170 wpa_s->manual_scan_only_new) {
1171 wpa_printf(MSG_DEBUG,
1172 "Request driver to clear scan cache due to manual only_new=1 scan");
949938aa 1173 params.only_new_results = 1;
2dbe63ad 1174 }
949938aa 1175
fee52342
JM		 1176 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
1177 wpa_s->manual_scan_freqs) {
1178 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
1179 params.freqs = wpa_s->manual_scan_freqs;
1180 wpa_s->manual_scan_freqs = NULL;
1181 }
1182
88a44755
JM		 1183 if (params.freqs == NULL && wpa_s->select_network_scan_freqs) {
1184 wpa_dbg(wpa_s, MSG_DEBUG,
1185 "Limit select_network scan to specified channels");
1186 params.freqs = wpa_s->select_network_scan_freqs;
1187 wpa_s->select_network_scan_freqs = NULL;
1188 }
1189
f47d639d 1190 if (params.freqs == NULL && wpa_s->next_scan_freqs) {
f049052b
BG		 1191 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
1192 "generated frequency list");
f47d639d
JM		 1193 params.freqs = wpa_s->next_scan_freqs;
1194 } else
1195 os_free(wpa_s->next_scan_freqs);
1196 wpa_s->next_scan_freqs = NULL;
faf9a858 1197 wpa_setband_scan_freqs(wpa_s, &params);
f47d639d 1198
f5ffc348
BG		 1199 /* See if user specified frequencies. If so, scan only those. */
1200 if (wpa_s->conf->freq_list && !params.freqs) {
1201 wpa_dbg(wpa_s, MSG_DEBUG,
1202 "Optimize scan based on conf->freq_list");
1203 int_array_concat(&params.freqs, wpa_s->conf->freq_list);
1204 }
1205
6124e858
BG		 1206 /* Use current associated channel? */
1207 if (wpa_s->conf->scan_cur_freq && !params.freqs) {
53c5dfc2
IP		 1208 unsigned int num = wpa_s->num_multichan_concurrent;
1209
1210 params.freqs = os_calloc(num + 1, sizeof(int));
1211 if (params.freqs) {
1212 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1213 if (num > 0) {
1214 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
1215 "current operating channels since "
1216 "scan_cur_freq is enabled");
1217 } else {
1218 os_free(params.freqs);
1219 params.freqs = NULL;
1220 }
6124e858
BG		 1221 }
1222 }
1223
2ac43334
RZ		 1224#ifdef CONFIG_MBO
1225 if (wpa_s->enable_oce & OCE_STA)
1226 params.oce_scan = 1;
1227#endif /* CONFIG_MBO */
1228
3812464c
JM		 1229 params.filter_ssids = wpa_supplicant_build_filter_ssids(
1230 wpa_s->conf, &params.num_filter_ssids);
46ee0427
JM		 1231 if (extra_ie) {
1232 params.extra_ies = wpabuf_head(extra_ie);
1233 params.extra_ies_len = wpabuf_len(extra_ie);
1234 }
3812464c 1235
d1dd48e3 1236#ifdef CONFIG_P2P
8235f89f 1237 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
85ea132a 1238 (wpa_s->show_group_started && wpa_s->go_params)) {
d1dd48e3
JM		 1239 /*
1240 * The interface may not yet be in P2P mode, so we have to
1241 * explicitly request P2P probe to disable CCK rates.
1242 */
1243 params.p2p_probe = 1;
1244 }
1245#endif /* CONFIG_P2P */
1246
346b333d 1247 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) &&
bb66d467
EC		 1248 wpa_s->wpa_state <= WPA_SCANNING)
1249 wpa_setup_mac_addr_rand_params(&params, wpa_s->mac_addr_scan);
56c76fa5 1250
0645492e
JM		 1251 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
1252 struct wpa_bss *bss;
1253
1254 params.bssid = wpa_s->next_scan_bssid;
1255 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
5fdacce4
VJ		 1256 if (!wpa_s->next_scan_bssid_wildcard_ssid &&
1257 bss && bss->ssid_len && params.num_ssids == 1 &&
0645492e
JM		 1258 params.ssids[0].ssid_len == 0) {
1259 params.ssids[0].ssid = bss->ssid;
1260 params.ssids[0].ssid_len = bss->ssid_len;
1261 wpa_dbg(wpa_s, MSG_DEBUG,
1262 "Scan a previously specified BSSID " MACSTR
1263 " and SSID %s",
1264 MAC2STR(params.bssid),
1265 wpa_ssid_txt(bss->ssid, bss->ssid_len));
1266 } else {
1267 wpa_dbg(wpa_s, MSG_DEBUG,
1268 "Scan a previously specified BSSID " MACSTR,
1269 MAC2STR(params.bssid));
1270 }
1271 }
1272
7c865c68
TB		 1273 scan_params = &params;
1274
1275scan:
5cc70322
JM		 1276#ifdef CONFIG_P2P
1277 /*
1278 * If the driver does not support multi-channel concurrency and a
1279 * virtual interface that shares the same radio with the wpa_s interface
1280 * is operating there may not be need to scan other channels apart from
1281 * the current operating channel on the other virtual interface. Filter
1282 * out other channels in case we are trying to find a connection for a
1283 * station interface when we are not configured to prefer station
1284 * connection and a concurrent operation is already in process.
1285 */
12455031
LP		 1286 if (wpa_s->scan_for_connection &&
1287 wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
5cc70322
JM		 1288 !scan_params->freqs && !params.freqs &&
1289 wpas_is_p2p_prioritized(wpa_s) &&
5cc70322
JM		 1290 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
1291 non_p2p_network_enabled(wpa_s)) {
53c5dfc2
IP		 1292 unsigned int num = wpa_s->num_multichan_concurrent;
1293
1294 params.freqs = os_calloc(num + 1, sizeof(int));
1295 if (params.freqs) {
1296 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1297 if (num > 0 && num == wpa_s->num_multichan_concurrent) {
1298 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
1299 } else {
1300 os_free(params.freqs);
1301 params.freqs = NULL;
1302 }
5cc70322
JM		 1303 }
1304 }
1305#endif /* CONFIG_P2P */
1306
7c865c68 1307 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
6fc6879b 1308
fee52342
JM		 1309 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
1310 !wpa_s->manual_scan_freqs) {
1311 /* Restore manual_scan_freqs for the next attempt */
1312 wpa_s->manual_scan_freqs = params.freqs;
1313 params.freqs = NULL;
1314 }
1315
46ee0427 1316 wpabuf_free(extra_ie);
d3a98225 1317 os_free(params.freqs);
3812464c 1318 os_free(params.filter_ssids);
bb66d467 1319 os_free(params.mac_addr);
ad08c363 1320
6fc6879b 1321 if (ret) {
f049052b 1322 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
2d9c99e3
JM		 1323 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
1324 wpa_supplicant_set_state(wpa_s,
1325 wpa_s->scan_prev_wpa_state);
23270cd8 1326 /* Restore scan_req since we will try to scan again */
12455031 1327 wpa_s->scan_req = wpa_s->last_scan_req;
1c4c9c50 1328 wpa_supplicant_req_scan(wpa_s, 1, 0);
5cc70322
JM		 1329 } else {
1330 wpa_s->scan_for_connection = 0;
a8826b18
JM		 1331#ifdef CONFIG_INTERWORKING
1332 wpa_s->interworking_fast_assoc_tried = 0;
1333#endif /* CONFIG_INTERWORKING */
5fdacce4 1334 wpa_s->next_scan_bssid_wildcard_ssid = 0;
0645492e
JM		 1335 if (params.bssid)
1336 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
d902a9c1 1337 }
6fc6879b
JM		 1338}
1339
1340
9e737f08
PF		 1341void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
1342{
594516b4 1343 struct os_reltime remaining, new_int;
9e737f08
PF		 1344 int cancelled;
1345
1346 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
1347 &remaining);
1348
1349 new_int.sec = sec;
1350 new_int.usec = 0;
594516b4 1351 if (cancelled && os_reltime_before(&remaining, &new_int)) {
9e737f08
PF		 1352 new_int.sec = remaining.sec;
1353 new_int.usec = remaining.usec;
1354 }
1355
c6f5dec9
PF		 1356 if (cancelled) {
1357 eloop_register_timeout(new_int.sec, new_int.usec,
1358 wpa_supplicant_scan, wpa_s, NULL);
1359 }
9e737f08
PF		 1360 wpa_s->scan_interval = sec;
1361}
1362
1363
6fc6879b
JM		 1364/**
1365 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1366 * @wpa_s: Pointer to wpa_supplicant data
1367 * @sec: Number of seconds after which to scan
1368 * @usec: Number of microseconds after which to scan
1369 *
1370 * This function is used to schedule a scan for neighboring access points after
1371 * the specified time.
1372 */
1373void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
1374{
44b9ea5b
JM		 1375 int res;
1376
1377 if (wpa_s->p2p_mgmt) {
1378 wpa_dbg(wpa_s, MSG_DEBUG,
1379 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1380 sec, usec);
1381 return;
1382 }
1383
1384 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
1385 NULL);
a09ffd5f
JM		 1386 if (res == 1) {
1387 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
e2f5a988 1388 sec, usec);
a09ffd5f
JM		 1389 } else if (res == 0) {
1390 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1391 sec, usec);
1392 } else {
1393 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
1394 sec, usec);
1395 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
e2f5a988 1396 }
6fc6879b
JM		 1397}
1398
1399
6a90053c
LC		 1400/**
1401 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1402 * @wpa_s: Pointer to wpa_supplicant data
1403 * @sec: Number of seconds after which to scan
1404 * @usec: Number of microseconds after which to scan
2c09af30 1405 * Returns: 0 on success or -1 otherwise
6a90053c
LC		 1406 *
1407 * This function is used to schedule periodic scans for neighboring
1408 * access points after the specified time.
1409 */
1410int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
1411 int sec, int usec)
1412{
1413 if (!wpa_s->sched_scan_supported)
1414 return -1;
1415
1416 eloop_register_timeout(sec, usec,
1417 wpa_supplicant_delayed_sched_scan_timeout,
1418 wpa_s, NULL);
1419
1420 return 0;
1421}
1422
1423
57c3a605 1424static void
1425wpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s,
1426 struct wpa_driver_scan_params *params)
1427{
1428 if (wpa_s->wpa_state != WPA_COMPLETED ||
1429 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) ||
1430 wpa_s->srp.relative_rssi_set == 0)
1431 return;
1432
1433 params->relative_rssi_set = 1;
1434 params->relative_rssi = wpa_s->srp.relative_rssi;
1435
1436 if (wpa_s->srp.relative_adjust_rssi == 0)
1437 return;
1438
1439 params->relative_adjust_band = wpa_s->srp.relative_adjust_band;
1440 params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi;
1441}
1442
1443
cbdf3507
LC		 1444/**
1445 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1446 * @wpa_s: Pointer to wpa_supplicant data
2c09af30 1447 * Returns: 0 is sched_scan was started or -1 otherwise
cbdf3507
LC		 1448 *
1449 * This function is used to schedule periodic scans for neighboring
1450 * access points repeating the scan continuously.
1451 */
1452int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
1453{
1454 struct wpa_driver_scan_params params;
7c865c68 1455 struct wpa_driver_scan_params *scan_params;
cbdf3507 1456 enum wpa_states prev_state;
7c865c68 1457 struct wpa_ssid *ssid = NULL;
a13e07ec 1458 struct wpabuf *extra_ie = NULL;
cbdf3507 1459 int ret;
cbdf3507 1460 unsigned int max_sched_scan_ssids;
76a5249e 1461 int wildcard = 0;
0b7a25c0 1462 int need_ssids;
32c02261 1463 struct sched_scan_plan scan_plan;
cbdf3507
LC		 1464
1465 if (!wpa_s->sched_scan_supported)
1466 return -1;
1467
1468 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
1469 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
1470 else
1471 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
54ddd743 1472 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
76a5249e 1473 return -1;
cbdf3507 1474
14f34a73
AS		 1475 wpa_s->sched_scan_stop_req = 0;
1476
1966e3d1
ES		 1477 if (wpa_s->sched_scanning) {
1478 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
cbdf3507 1479 return 0;
1966e3d1 1480 }
cbdf3507 1481
0b7a25c0
JM		 1482 need_ssids = 0;
1483 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
349493bd 1484 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
0b7a25c0
JM		 1485 /* Use wildcard SSID to find this network */
1486 wildcard = 1;
349493bd
JM		 1487 } else if (!wpas_network_disabled(wpa_s, ssid) &&
1488 ssid->ssid_len)
0b7a25c0 1489 need_ssids++;
aa283ddd
JM		 1490
1491#ifdef CONFIG_WPS
349493bd 1492 if (!wpas_network_disabled(wpa_s, ssid) &&
fea7c3a0 1493 ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
aa283ddd
JM		 1494 /*
1495 * Normal scan is more reliable and faster for WPS
1496 * operations and since these are for short periods of
1497 * time, the benefit of trying to use sched_scan would
1498 * be limited.
1499 */
1500 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1501 "sched_scan for WPS");
1502 return -1;
1503 }
1504#endif /* CONFIG_WPS */
0b7a25c0
JM		 1505 }
1506 if (wildcard)
1507 need_ssids++;
1508
1509 if (wpa_s->normal_scans < 3 &&
1510 (need_ssids <= wpa_s->max_scan_ssids ||
1511 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
1512 /*
1513 * When normal scan can speed up operations, use that for the
1514 * first operations before starting the sched_scan to allow
1515 * user space sleep more. We do this only if the normal scan
1516 * has functionality that is suitable for this or if the
1517 * sched_scan does not have better support for multiple SSIDs.
1518 */
1519 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1520 "sched_scan for initial scans (normal_scans=%d)",
1521 wpa_s->normal_scans);
1522 return -1;
1523 }
1524
cbdf3507
LC		 1525 os_memset(&params, 0, sizeof(params));
1526
b59e6f26 1527 /* If we can't allocate space for the filters, we just don't filter */
faebdeaa 1528 params.filter_ssids = os_calloc(wpa_s->max_match_sets,
b59e6f26
LC		 1529 sizeof(struct wpa_driver_scan_filter));
1530
cbdf3507
LC		 1531 prev_state = wpa_s->wpa_state;
1532 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1533 wpa_s->wpa_state == WPA_INACTIVE)
1534 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1535
7c865c68
TB		 1536 if (wpa_s->autoscan_params != NULL) {
1537 scan_params = wpa_s->autoscan_params;
1538 goto scan;
1539 }
1540
cbdf3507
LC		 1541 /* Find the starting point from which to continue scanning */
1542 ssid = wpa_s->conf->ssid;
1543 if (wpa_s->prev_sched_ssid) {
1544 while (ssid) {
1545 if (ssid == wpa_s->prev_sched_ssid) {
1546 ssid = ssid->next;
1547 break;
1548 }
1549 ssid = ssid->next;
1550 }
1551 }
1552
1553 if (!ssid || !wpa_s->prev_sched_ssid) {
1554 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
cbdf3507
LC		 1555 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1556 wpa_s->first_sched_scan = 1;
1557 ssid = wpa_s->conf->ssid;
1558 wpa_s->prev_sched_ssid = ssid;
1559 }
1560
76a5249e
JM		 1561 if (wildcard) {
1562 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
1563 params.num_ssids++;
1564 }
1565
cbdf3507 1566 while (ssid) {
349493bd 1567 if (wpas_network_disabled(wpa_s, ssid))
5edddf41 1568 goto next;
cbdf3507 1569
fcd16847
JM		 1570 if (params.num_filter_ssids < wpa_s->max_match_sets &&
1571 params.filter_ssids && ssid->ssid && ssid->ssid_len) {
1966e3d1
ES		 1572 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
1573 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
b59e6f26
LC		 1574 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
1575 ssid->ssid, ssid->ssid_len);
1576 params.filter_ssids[params.num_filter_ssids].ssid_len =
1577 ssid->ssid_len;
1578 params.num_filter_ssids++;
86b47aaf
JM		 1579 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
1580 {
1581 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
1582 "filter for sched_scan - drop filter");
1583 os_free(params.filter_ssids);
1584 params.filter_ssids = NULL;
1585 params.num_filter_ssids = 0;
b59e6f26
LC		 1586 }
1587
3f56f3a4 1588 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
76a5249e
JM		 1589 if (params.num_ssids == max_sched_scan_ssids)
1590 break; /* only room for broadcast SSID */
3f56f3a4
JM		 1591 wpa_dbg(wpa_s, MSG_DEBUG,
1592 "add to active scan ssid: %s",
1966e3d1 1593 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
cbdf3507
LC		 1594 params.ssids[params.num_ssids].ssid =
1595 ssid->ssid;
1596 params.ssids[params.num_ssids].ssid_len =
1597 ssid->ssid_len;
1598 params.num_ssids++;
b59e6f26 1599 if (params.num_ssids >= max_sched_scan_ssids) {
cbdf3507 1600 wpa_s->prev_sched_ssid = ssid;
b55aca46
JM		 1601 do {
1602 ssid = ssid->next;
1603 } while (ssid &&
349493bd 1604 (wpas_network_disabled(wpa_s, ssid) ||
fea7c3a0 1605 !ssid->scan_ssid));
cbdf3507
LC		 1606 break;
1607 }
1608 }
b59e6f26 1609
5edddf41 1610 next:
cbdf3507
LC		 1611 wpa_s->prev_sched_ssid = ssid;
1612 ssid = ssid->next;
1613 }
1614
7c6a266c
JM		 1615 if (params.num_filter_ssids == 0) {
1616 os_free(params.filter_ssids);
1617 params.filter_ssids = NULL;
1618 }
1619
a13e07ec
ES		 1620 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1621 if (extra_ie) {
1622 params.extra_ies = wpabuf_head(extra_ie);
1623 params.extra_ies_len = wpabuf_len(extra_ie);
1624 }
cbdf3507 1625
cf70d298
RM		 1626 if (wpa_s->conf->filter_rssi)
1627 params.filter_rssi = wpa_s->conf->filter_rssi;
1628
1cc0d6a0
BP		 1629 /* See if user specified frequencies. If so, scan only those. */
1630 if (wpa_s->conf->freq_list && !params.freqs) {
1631 wpa_dbg(wpa_s, MSG_DEBUG,
1632 "Optimize scan based on conf->freq_list");
1633 int_array_concat(&params.freqs, wpa_s->conf->freq_list);
1634 }
1635
2ac43334
RZ		 1636#ifdef CONFIG_MBO
1637 if (wpa_s->enable_oce & OCE_STA)
1638 params.oce_scan = 1;
1639#endif /* CONFIG_MBO */
1640
7c865c68
TB		 1641 scan_params = &params;
1642
1643scan:
32c02261
AS		 1644 wpa_s->sched_scan_timed_out = 0;
1645
1646 /*
1647 * We cannot support multiple scan plans if the scan request includes
1648 * too many SSID's, so in this case use only the last scan plan and make
1649 * it run infinitely. It will be stopped by the timeout.
1650 */
1651 if (wpa_s->sched_scan_plans_num == 1 ||
1652 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
1653 params.sched_scan_plans = wpa_s->sched_scan_plans;
1654 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
1655 } else if (wpa_s->sched_scan_plans_num > 1) {
a8cb5a88 1656 wpa_dbg(wpa_s, MSG_DEBUG,
32c02261
AS		 1657 "Too many SSIDs. Default to using single scheduled_scan plan");
1658 params.sched_scan_plans =
1659 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
1660 1];
1661 params.sched_scan_plans_num = 1;
7d21a223 1662 } else {
32c02261
AS		 1663 if (wpa_s->conf->sched_scan_interval)
1664 scan_plan.interval = wpa_s->conf->sched_scan_interval;
1665 else
1666 scan_plan.interval = 10;
1667
1668 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
1669 wpa_printf(MSG_WARNING,
1670 "Scan interval too long(%u), use the maximum allowed(%u)",
1671 scan_plan.interval,
1672 wpa_s->max_sched_scan_plan_interval);
1673 scan_plan.interval =
1674 wpa_s->max_sched_scan_plan_interval;
1675 }
1676
1677 scan_plan.iterations = 0;
1678 params.sched_scan_plans = &scan_plan;
1679 params.sched_scan_plans_num = 1;
1680 }
1681
d0330d57
PK		 1682 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
1683
32c02261 1684 if (ssid || !wpa_s->first_sched_scan) {
7d21a223 1685 wpa_dbg(wpa_s, MSG_DEBUG,
d0330d57
PK		 1686 "Starting sched scan after %u seconds: interval %u timeout %d",
1687 params.sched_scan_start_delay,
32c02261
AS		 1688 params.sched_scan_plans[0].interval,
1689 wpa_s->sched_scan_timeout);
1690 } else {
d0330d57
PK		 1691 wpa_dbg(wpa_s, MSG_DEBUG,
1692 "Starting sched scan after %u seconds (no timeout)",
1693 params.sched_scan_start_delay);
a8cb5a88 1694 }
cbdf3507 1695
faf9a858
JM		 1696 wpa_setband_scan_freqs(wpa_s, scan_params);
1697
346b333d 1698 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) &&
bb66d467
EC		 1699 wpa_s->wpa_state <= WPA_SCANNING)
1700 wpa_setup_mac_addr_rand_params(&params,
1701 wpa_s->mac_addr_sched_scan);
56c76fa5 1702
57c3a605 1703 wpa_scan_set_relative_rssi_params(wpa_s, scan_params);
1704
32c02261 1705 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
a13e07ec 1706 wpabuf_free(extra_ie);
b59e6f26 1707 os_free(params.filter_ssids);
bb66d467 1708 os_free(params.mac_addr);
cbdf3507
LC		 1709 if (ret) {
1710 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
1711 if (prev_state != wpa_s->wpa_state)
1712 wpa_supplicant_set_state(wpa_s, prev_state);
1713 return ret;
1714 }
1715
1716 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1717 if (ssid || !wpa_s->first_sched_scan) {
1718 wpa_s->sched_scan_timed_out = 0;
1719 eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
1720 wpa_supplicant_sched_scan_timeout,
1721 wpa_s, NULL);
1722 wpa_s->first_sched_scan = 0;
1723 wpa_s->sched_scan_timeout /= 2;
32c02261
AS		 1724 params.sched_scan_plans[0].interval *= 2;
1725 if ((unsigned int) wpa_s->sched_scan_timeout <
1726 params.sched_scan_plans[0].interval ||
1727 params.sched_scan_plans[0].interval >
1728 wpa_s->max_sched_scan_plan_interval) {
1729 params.sched_scan_plans[0].interval = 10;
a09fc1cc
DS		 1730 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1731 }
cbdf3507
LC		 1732 }
1733
7ed52f67
DS		 1734 /* If there is no more ssids, start next time from the beginning */
1735 if (!ssid)
1736 wpa_s->prev_sched_ssid = NULL;
1737
cbdf3507
LC		 1738 return 0;
1739}
1740
1741
6fc6879b
JM		 1742/**
1743 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1744 * @wpa_s: Pointer to wpa_supplicant data
1745 *
1746 * This function is used to cancel a scan request scheduled with
1747 * wpa_supplicant_req_scan().
1748 */
1749void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
1750{
f049052b 1751 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
6fc6879b
JM		 1752 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
1753}
cb8564b1
DW		 1754
1755
831770bf
CZ		 1756/**
1757 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1758 * @wpa_s: Pointer to wpa_supplicant data
1759 *
1760 * This function is used to stop a delayed scheduled scan.
1761 */
1762void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
1763{
1764 if (!wpa_s->sched_scan_supported)
1765 return;
1766
1767 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
1768 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
1769 wpa_s, NULL);
1770}
1771
1772
cbdf3507
LC		 1773/**
1774 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1775 * @wpa_s: Pointer to wpa_supplicant data
1776 *
1777 * This function is used to stop a periodic scheduled scan.
1778 */
1779void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
1780{
1781 if (!wpa_s->sched_scanning)
1782 return;
1783
14f34a73
AS		 1784 if (wpa_s->sched_scanning)
1785 wpa_s->sched_scan_stop_req = 1;
1786
cbdf3507
LC		 1787 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
1788 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
1789 wpa_supplicant_stop_sched_scan(wpa_s);
1790}
1791
1792
2c09af30
JM		 1793/**
1794 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1795 * @wpa_s: Pointer to wpa_supplicant data
1796 * @scanning: Whether scanning is currently in progress
1797 *
1798 * This function is to generate scanning notifycations. It is called whenever
1799 * there may have been a change in scanning (scan started, completed, stopped).
1800 * wpas_notify_scanning() is called whenever the scanning state changed from the
1801 * previously notified state.
1802 */
cb8564b1
DW		 1803void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
1804 int scanning)
1805{
1806 if (wpa_s->scanning != scanning) {
1807 wpa_s->scanning = scanning;
8bac466b 1808 wpas_notify_scanning(wpa_s);
cb8564b1
DW		 1809 }
1810}
1811
9ba9fa07
JM		 1812
1813static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
1814{
1815 int rate = 0;
1816 const u8 *ie;
1817 int i;
1818
1819 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
1820 for (i = 0; ie && i < ie[1]; i++) {
1821 if ((ie[i + 2] & 0x7f) > rate)
1822 rate = ie[i + 2] & 0x7f;
1823 }
1824
1825 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
1826 for (i = 0; ie && i < ie[1]; i++) {
1827 if ((ie[i + 2] & 0x7f) > rate)
1828 rate = ie[i + 2] & 0x7f;
1829 }
1830
1831 return rate;
1832}
1833
1834
2c09af30
JM		 1835/**
1836 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1837 * @res: Scan result entry
1838 * @ie: Information element identitifier (WLAN_EID_*)
1839 * Returns: Pointer to the information element (id field) or %NULL if not found
1840 *
1841 * This function returns the first matching information element in the scan
1842 * result.
1843 */
d1f9c410
JM		 1844const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
1845{
d044d2f7
EP		 1846 size_t ie_len = res->ie_len;
1847
1848 /* Use the Beacon frame IEs if res->ie_len is not available */
1849 if (!ie_len)
1850 ie_len = res->beacon_ie_len;
1851
1852 return get_ie((const u8 *) (res + 1), ie_len, ie);
d1f9c410
JM		 1853}
1854
1855
2c09af30
JM		 1856/**
1857 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1858 * @res: Scan result entry
1859 * @vendor_type: Vendor type (four octets starting the IE payload)
1860 * Returns: Pointer to the information element (id field) or %NULL if not found
1861 *
1862 * This function returns the first matching information element in the scan
1863 * result.
1864 */
9ba9fa07
JM		 1865const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1866 u32 vendor_type)
1867{
1868 const u8 *end, *pos;
1869
1870 pos = (const u8 *) (res + 1);
1871 end = pos + res->ie_len;
1872
904e977b
JM		 1873 while (end - pos > 1) {
1874 if (2 + pos[1] > end - pos)
9ba9fa07
JM		 1875 break;
1876 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1877 vendor_type == WPA_GET_BE32(&pos[2]))
1878 return pos;
1879 pos += 2 + pos[1];
1880 }
1881
1882 return NULL;
1883}
1884
1885
aaeb9c98
JM		 1886/**
1887 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1888 * @res: Scan result entry
1889 * @vendor_type: Vendor type (four octets starting the IE payload)
1890 * Returns: Pointer to the information element (id field) or %NULL if not found
1891 *
1892 * This function returns the first matching information element in the scan
1893 * result.
1894 *
1895 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1896 * from Beacon frames instead of either Beacon or Probe Response frames.
1897 */
1898const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
1899 u32 vendor_type)
1900{
1901 const u8 *end, *pos;
1902
1903 if (res->beacon_ie_len == 0)
1904 return NULL;
1905
1906 pos = (const u8 *) (res + 1);
1907 pos += res->ie_len;
1908 end = pos + res->beacon_ie_len;
1909
904e977b
JM		 1910 while (end - pos > 1) {
1911 if (2 + pos[1] > end - pos)
aaeb9c98
JM		 1912 break;
1913 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1914 vendor_type == WPA_GET_BE32(&pos[2]))
1915 return pos;
1916 pos += 2 + pos[1];
1917 }
1918
1919 return NULL;
1920}
1921
1922
2c09af30
JM		 1923/**
1924 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
1925 * @res: Scan result entry
1926 * @vendor_type: Vendor type (four octets starting the IE payload)
1927 * Returns: Pointer to the information element payload or %NULL if not found
1928 *
1929 * This function returns concatenated payload of possibly fragmented vendor
1930 * specific information elements in the scan result. The caller is responsible
1931 * for freeing the returned buffer.
1932 */
9ba9fa07
JM		 1933struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1934 u32 vendor_type)
1935{
1936 struct wpabuf *buf;
1937 const u8 *end, *pos;
1938
1939 buf = wpabuf_alloc(res->ie_len);
1940 if (buf == NULL)
1941 return NULL;
1942
1943 pos = (const u8 *) (res + 1);
1944 end = pos + res->ie_len;
1945
904e977b
JM		 1946 while (end - pos > 1) {
1947 if (2 + pos[1] > end - pos)
54f489be
JM		 1948 break;
1949 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
1950 vendor_type == WPA_GET_BE32(&pos[2]))
1951 wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4);
1952 pos += 2 + pos[1];
1953 }
1954
1955 if (wpabuf_len(buf) == 0) {
1956 wpabuf_free(buf);
1957 buf = NULL;
1958 }
1959
1960 return buf;
1961}
1962
1963
9ba9fa07
JM		 1964/* Compare function for sorting scan results. Return >0 if @b is considered
1965 * better. */
1966static int wpa_scan_result_compar(const void *a, const void *b)
1967{
577db0ae 1968#define MIN(a,b) a < b ? a : b
9ba9fa07
JM		 1969 struct wpa_scan_res **_wa = (void *) a;
1970 struct wpa_scan_res **_wb = (void *) b;
1971 struct wpa_scan_res *wa = *_wa;
1972 struct wpa_scan_res *wb = *_wb;
a1b790eb
JM		 1973 int wpa_a, wpa_b;
1974 int snr_a, snr_b, snr_a_full, snr_b_full;
9ba9fa07
JM		 1975
1976 /* WPA/WPA2 support preferred */
1977 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
1978 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
1979 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
1980 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
1981
1982 if (wpa_b && !wpa_a)
1983 return 1;
1984 if (!wpa_b && wpa_a)
1985 return -1;
1986
1987 /* privacy support preferred */
1988 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
1989 (wb->caps & IEEE80211_CAP_PRIVACY))
1990 return 1;
1991 if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
1992 (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
1993 return -1;
1994
f0d0a5d2 1995 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
a1b790eb
JM		 1996 snr_a_full = wa->snr;
1997 snr_a = MIN(wa->snr, GREAT_SNR);
1998 snr_b_full = wb->snr;
aa517ae2 1999 snr_b = MIN(wb->snr, GREAT_SNR);
577db0ae 2000 } else {
f0d0a5d2
MA		 2001 /* Level is not in dBm, so we can't calculate
2002 * SNR. Just use raw level (units unknown). */
a1b790eb
JM		 2003 snr_a = snr_a_full = wa->level;
2004 snr_b = snr_b_full = wb->level;
577db0ae
GM		 2005 }
2006
f0d0a5d2 2007 /* if SNR is close, decide by max rate or frequency band */
b4d56efb 2008 if (snr_a && snr_b && abs(snr_b - snr_a) < 7) {
a1b790eb 2009 if (wa->est_throughput != wb->est_throughput)
ec2e7c4c
JM		 2010 return (int) wb->est_throughput -
2011 (int) wa->est_throughput;
b4d56efb
JM		 2012 }
2013 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
2014 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
577db0ae
GM		 2015 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
2016 return IS_5GHZ(wa->freq) ? -1 : 1;
9ba9fa07
JM		 2017 }
2018
577db0ae 2019 /* all things being equal, use SNR; if SNRs are
9ba9fa07
JM		 2020 * identical, use quality values since some drivers may only report
2021 * that value and leave the signal level zero */
a1b790eb 2022 if (snr_b_full == snr_a_full)
9ba9fa07 2023 return wb->qual - wa->qual;
a1b790eb 2024 return snr_b_full - snr_a_full;
577db0ae 2025#undef MIN
9ba9fa07
JM		 2026}
2027
2028
41e650ae
JM		 2029#ifdef CONFIG_WPS
2030/* Compare function for sorting scan results when searching a WPS AP for
2031 * provisioning. Return >0 if @b is considered better. */
2032static int wpa_scan_result_wps_compar(const void *a, const void *b)
2033{
2034 struct wpa_scan_res **_wa = (void *) a;
2035 struct wpa_scan_res **_wb = (void *) b;
2036 struct wpa_scan_res *wa = *_wa;
2037 struct wpa_scan_res *wb = *_wb;
2038 int uses_wps_a, uses_wps_b;
2039 struct wpabuf *wps_a, *wps_b;
2040 int res;
2041
2042 /* Optimization - check WPS IE existence before allocated memory and
2043 * doing full reassembly. */
2044 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
2045 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
2046 if (uses_wps_a && !uses_wps_b)
2047 return -1;
2048 if (!uses_wps_a && uses_wps_b)
2049 return 1;
2050
2051 if (uses_wps_a && uses_wps_b) {
2052 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
2053 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
2054 res = wps_ap_priority_compar(wps_a, wps_b);
2055 wpabuf_free(wps_a);
2056 wpabuf_free(wps_b);
2057 if (res)
2058 return res;
2059 }
2060
2061 /*
2062 * Do not use current AP security policy as a sorting criteria during
2063 * WPS provisioning step since the AP may get reconfigured at the
2064 * completion of provisioning.
2065 */
2066
2067 /* all things being equal, use signal level; if signal levels are
2068 * identical, use quality values since some drivers may only report
2069 * that value and leave the signal level zero */
2070 if (wb->level == wa->level)
2071 return wb->qual - wa->qual;
2072 return wb->level - wa->level;
2073}
2074#endif /* CONFIG_WPS */
2075
2076
aa820e02
JM		 2077static void dump_scan_res(struct wpa_scan_results *scan_res)
2078{
76202aed 2079#ifndef CONFIG_NO_STDOUT_DEBUG
aa820e02
JM		 2080 size_t i;
2081
2082 if (scan_res->res == NULL || scan_res->num == 0)
2083 return;
2084
2085 wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
2086
2087 for (i = 0; i < scan_res->num; i++) {
2088 struct wpa_scan_res *r = scan_res->res[i];
1cbe86e2 2089 u8 *pos;
f0d0a5d2 2090 if (r->flags & WPA_SCAN_LEVEL_DBM) {
f0d0a5d2
MA		 2091 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
2092
aa820e02 2093 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
a1b790eb 2094 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
aa820e02 2095 MAC2STR(r->bssid), r->freq, r->qual,
f0d0a5d2 2096 r->noise, noise_valid ? "" : "~", r->level,
a1b790eb
JM		 2097 r->snr, r->snr >= GREAT_SNR ? "*" : "",
2098 r->flags,
2099 r->age, r->est_throughput);
aa820e02
JM		 2100 } else {
2101 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
a1b790eb 2102 "noise=%d level=%d flags=0x%x age=%u est=%u",
aa820e02 2103 MAC2STR(r->bssid), r->freq, r->qual,
a1b790eb
JM		 2104 r->noise, r->level, r->flags, r->age,
2105 r->est_throughput);
aa820e02 2106 }
1cbe86e2
JM		 2107 pos = (u8 *) (r + 1);
2108 if (r->ie_len)
2109 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
2110 pos += r->ie_len;
2111 if (r->beacon_ie_len)
2112 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
2113 pos, r->beacon_ie_len);
aa820e02 2114 }
76202aed 2115#endif /* CONFIG_NO_STDOUT_DEBUG */
aa820e02
JM		 2116}
2117
2118
2c09af30
JM		 2119/**
2120 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
2121 * @wpa_s: Pointer to wpa_supplicant data
2122 * @bssid: BSSID to check
2123 * Returns: 0 if the BSSID is filtered or 1 if not
2124 *
2125 * This function is used to filter out specific BSSIDs from scan reslts mainly
2126 * for testing purposes (SET bssid_filter ctrl_iface command).
2127 */
d445a5cd
JM		 2128int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
2129 const u8 *bssid)
2130{
2131 size_t i;
2132
2133 if (wpa_s->bssid_filter == NULL)
2134 return 1;
2135
2136 for (i = 0; i < wpa_s->bssid_filter_count; i++) {
2137 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
2138 ETH_ALEN) == 0)
2139 return 1;
2140 }
2141
2142 return 0;
2143}
2144
2145
2f195639
KV		 2146void filter_scan_res(struct wpa_supplicant *wpa_s,
2147 struct wpa_scan_results *res)
d445a5cd
JM		 2148{
2149 size_t i, j;
2150
2151 if (wpa_s->bssid_filter == NULL)
2152 return;
2153
2154 for (i = 0, j = 0; i < res->num; i++) {
2155 if (wpa_supplicant_filter_bssid_match(wpa_s,
2156 res->res[i]->bssid)) {
2157 res->res[j++] = res->res[i];
2158 } else {
2159 os_free(res->res[i]);
2160 res->res[i] = NULL;
2161 }
2162 }
2163
2164 if (res->num != j) {
2165 wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
2166 (int) (res->num - j));
2167 res->num = j;
2168 }
2169}
2170
2171
2f195639 2172void scan_snr(struct wpa_scan_res *res)
a1b790eb
JM		 2173{
2174 if (res->flags & WPA_SCAN_NOISE_INVALID) {
2175 res->noise = IS_5GHZ(res->freq) ?
2176 DEFAULT_NOISE_FLOOR_5GHZ :
2177 DEFAULT_NOISE_FLOOR_2GHZ;
2178 }
2179
2180 if (res->flags & WPA_SCAN_LEVEL_DBM) {
2181 res->snr = res->level - res->noise;
2182 } else {
2183 /* Level is not in dBm, so we can't calculate
2184 * SNR. Just use raw level (units unknown). */
2185 res->snr = res->level;
2186 }
2187}
2188
2189
22f0318d
MW		 2190static unsigned int interpolate_rate(int snr, int snr0, int snr1,
2191 int rate0, int rate1)
2192{
2193 return rate0 + (snr - snr0) * (rate1 - rate0) / (snr1 - snr0);
2194}
2195
2196
2197#define INTERPOLATE_RATE(snr0, snr1, rate0, rate1) \
2198 if (snr < (snr1)) \
2199 return interpolate_rate(snr, (snr0), (snr1), (rate0), (rate1))
2200
3a25897e 2201static unsigned int max_ht20_rate(int snr, int vht)
a1b790eb 2202{
22f0318d 2203 if (snr < 0)
3a25897e 2204 return 0;
22f0318d
MW		 2205 INTERPOLATE_RATE(0, 2, 0, 6500); /* HT20 MCS0 */
2206 INTERPOLATE_RATE(2, 5, 6500, 13000); /* HT20 MCS1 */
2207 INTERPOLATE_RATE(5, 9, 13000, 19500); /* HT20 MCS2 */
2208 INTERPOLATE_RATE(9, 11, 19500, 26000); /* HT20 MCS3 */
2209 INTERPOLATE_RATE(11, 15, 26000, 39000); /* HT20 MCS4 */
2210 INTERPOLATE_RATE(15, 18, 39000, 52000); /* HT20 MCS5 */
2211 INTERPOLATE_RATE(18, 20, 52000, 58500); /* HT20 MCS6 */
2212 INTERPOLATE_RATE(20, 25, 58500, 65000); /* HT20 MCS7 */
2213 if (!vht)
2214 return 65000;
2215 INTERPOLATE_RATE(25, 29, 65000, 78000); /* VHT20 MCS8 */
2216 return 78000;
a1b790eb
JM		 2217}
2218
2219
3a25897e 2220static unsigned int max_ht40_rate(int snr, int vht)
a1b790eb 2221{
22f0318d 2222 if (snr < 0)
3a25897e 2223 return 0;
22f0318d
MW		 2224 INTERPOLATE_RATE(0, 5, 0, 13500); /* HT40 MCS0 */
2225 INTERPOLATE_RATE(5, 8, 13500, 27000); /* HT40 MCS1 */
2226 INTERPOLATE_RATE(8, 12, 27000, 40500); /* HT40 MCS2 */
2227 INTERPOLATE_RATE(12, 14, 40500, 54000); /* HT40 MCS3 */
2228 INTERPOLATE_RATE(14, 18, 54000, 81000); /* HT40 MCS4 */
2229 INTERPOLATE_RATE(18, 21, 81000, 108000); /* HT40 MCS5 */
2230 INTERPOLATE_RATE(21, 23, 108000, 121500); /* HT40 MCS6 */
2231 INTERPOLATE_RATE(23, 28, 121500, 135000); /* HT40 MCS7 */
2232 if (!vht)
2233 return 135000;
2234 INTERPOLATE_RATE(28, 32, 135000, 162000); /* VHT40 MCS8 */
2235 INTERPOLATE_RATE(32, 34, 162000, 180000); /* VHT40 MCS9 */
2236 return 180000;
a1b790eb
JM		 2237}
2238
2239
2240static unsigned int max_vht80_rate(int snr)
2241{
22f0318d 2242 if (snr < 0)
a1b790eb 2243 return 0;
22f0318d
MW		 2244 INTERPOLATE_RATE(0, 8, 0, 29300); /* VHT80 MCS0 */
2245 INTERPOLATE_RATE(8, 11, 29300, 58500); /* VHT80 MCS1 */
2246 INTERPOLATE_RATE(11, 15, 58500, 87800); /* VHT80 MCS2 */
2247 INTERPOLATE_RATE(15, 17, 87800, 117000); /* VHT80 MCS3 */
2248 INTERPOLATE_RATE(17, 21, 117000, 175500); /* VHT80 MCS4 */
2249 INTERPOLATE_RATE(21, 24, 175500, 234000); /* VHT80 MCS5 */
2250 INTERPOLATE_RATE(24, 26, 234000, 263300); /* VHT80 MCS6 */
2251 INTERPOLATE_RATE(26, 31, 263300, 292500); /* VHT80 MCS7 */
2252 INTERPOLATE_RATE(31, 35, 292500, 351000); /* VHT80 MCS8 */
2253 INTERPOLATE_RATE(35, 37, 351000, 390000); /* VHT80 MCS9 */
2254 return 390000;
a1b790eb
JM		 2255}
2256
22f0318d
MW		 2257#undef INTERPOLATE_RATE
2258
a1b790eb 2259
ad06ac0b
EG		 2260unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s,
2261 const u8 *ies, size_t ies_len, int rate,
2262 int snr)
a1b790eb
JM		 2263{
2264 enum local_hw_capab capab = wpa_s->hw_capab;
a1b790eb 2265 unsigned int est, tmp;
ad06ac0b 2266 const u8 *ie;
a1b790eb
JM		 2267
2268 /* Limit based on estimated SNR */
2269 if (rate > 1 * 2 && snr < 1)
2270 rate = 1 * 2;
2271 else if (rate > 2 * 2 && snr < 4)
2272 rate = 2 * 2;
2273 else if (rate > 6 * 2 && snr < 5)
2274 rate = 6 * 2;
2275 else if (rate > 9 * 2 && snr < 6)
2276 rate = 9 * 2;
2277 else if (rate > 12 * 2 && snr < 7)
2278 rate = 12 * 2;
22f0318d
MW		 2279 else if (rate > 12 * 2 && snr < 8)
2280 rate = 14 * 2;
2281 else if (rate > 12 * 2 && snr < 9)
2282 rate = 16 * 2;
a1b790eb
JM		 2283 else if (rate > 18 * 2 && snr < 10)
2284 rate = 18 * 2;
2285 else if (rate > 24 * 2 && snr < 11)
2286 rate = 24 * 2;
22f0318d
MW		 2287 else if (rate > 24 * 2 && snr < 12)
2288 rate = 27 * 2;
2289 else if (rate > 24 * 2 && snr < 13)
2290 rate = 30 * 2;
2291 else if (rate > 24 * 2 && snr < 14)
2292 rate = 33 * 2;
a1b790eb
JM		 2293 else if (rate > 36 * 2 && snr < 15)
2294 rate = 36 * 2;
22f0318d
MW		 2295 else if (rate > 36 * 2 && snr < 16)
2296 rate = 39 * 2;
2297 else if (rate > 36 * 2 && snr < 17)
2298 rate = 42 * 2;
2299 else if (rate > 36 * 2 && snr < 18)
2300 rate = 45 * 2;
a1b790eb
JM		 2301 else if (rate > 48 * 2 && snr < 19)
2302 rate = 48 * 2;
22f0318d
MW		 2303 else if (rate > 48 * 2 && snr < 20)
2304 rate = 51 * 2;
a1b790eb
JM		 2305 else if (rate > 54 * 2 && snr < 21)
2306 rate = 54 * 2;
2307 est = rate * 500;
2308
2309 if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) {
ad06ac0b 2310 ie = get_ie(ies, ies_len, WLAN_EID_HT_CAP);
a1b790eb 2311 if (ie) {
3a25897e 2312 tmp = max_ht20_rate(snr, 0);
a1b790eb
JM		 2313 if (tmp > est)
2314 est = tmp;
2315 }
2316 }
2317
2318 if (capab == CAPAB_HT40 || capab == CAPAB_VHT) {
ad06ac0b 2319 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
a1b790eb
JM		 2320 if (ie && ie[1] >= 2 &&
2321 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
3a25897e 2322 tmp = max_ht40_rate(snr, 0);
a1b790eb
JM		 2323 if (tmp > est)
2324 est = tmp;
2325 }
2326 }
2327
2328 if (capab == CAPAB_VHT) {
2329 /* Use +1 to assume VHT is always faster than HT */
ad06ac0b 2330 ie = get_ie(ies, ies_len, WLAN_EID_VHT_CAP);
a1b790eb 2331 if (ie) {
3a25897e 2332 tmp = max_ht20_rate(snr, 1) + 1;
a1b790eb
JM		 2333 if (tmp > est)
2334 est = tmp;
2335
ad06ac0b 2336 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
a1b790eb
JM		 2337 if (ie && ie[1] >= 2 &&
2338 (ie[3] &
2339 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
3a25897e 2340 tmp = max_ht40_rate(snr, 1) + 1;
a1b790eb
JM		 2341 if (tmp > est)
2342 est = tmp;
2343 }
2344
ad06ac0b 2345 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
a1b790eb
JM		 2346 if (ie && ie[1] >= 1 &&
2347 (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) {
2348 tmp = max_vht80_rate(snr) + 1;
2349 if (tmp > est)
2350 est = tmp;
2351 }
2352 }
2353 }
2354
ad06ac0b
EG		 2355 return est;
2356}
2357
2358
2359void scan_est_throughput(struct wpa_supplicant *wpa_s,
2360 struct wpa_scan_res *res)
2361{
2362 int rate; /* max legacy rate in 500 kb/s units */
2363 int snr = res->snr;
2364 const u8 *ies = (const void *) (res + 1);
2365 size_t ie_len = res->ie_len;
2366
2367 if (res->est_throughput)
2368 return;
2369
2370 /* Get maximum legacy rate */
2371 rate = wpa_scan_get_max_rate(res);
a1b790eb 2372
ad06ac0b
EG		 2373 if (!ie_len)
2374 ie_len = res->beacon_ie_len;
2375 res->est_throughput =
fee28410 2376 wpas_get_est_tpt(wpa_s, ies, ie_len, rate, snr);
ad06ac0b
EG		 2377
2378 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
a1b790eb
JM		 2379}
2380
2381
9ba9fa07
JM		 2382/**
2383 * wpa_supplicant_get_scan_results - Get scan results
2384 * @wpa_s: Pointer to wpa_supplicant data
2385 * @info: Information about what was scanned or %NULL if not available
2386 * @new_scan: Whether a new scan was performed
2387 * Returns: Scan results, %NULL on failure
2388 *
2389 * This function request the current scan results from the driver and updates
2390 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2391 * results with wpa_scan_results_free().
2392 */
2393struct wpa_scan_results *
2394wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
2395 struct scan_info *info, int new_scan)
2396{
2397 struct wpa_scan_results *scan_res;
2398 size_t i;
41e650ae 2399 int (*compar)(const void *, const void *) = wpa_scan_result_compar;
9ba9fa07 2400
17fbb751 2401 scan_res = wpa_drv_get_scan_results2(wpa_s);
9ba9fa07 2402 if (scan_res == NULL) {
f049052b 2403 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
9ba9fa07
JM		 2404 return NULL;
2405 }
c5f10e80
JM		 2406 if (scan_res->fetch_time.sec == 0) {
2407 /*
2408 * Make sure we have a valid timestamp if the driver wrapper
2409 * does not set this.
2410 */
acb69cec 2411 os_get_reltime(&scan_res->fetch_time);
c5f10e80 2412 }
d445a5cd 2413 filter_scan_res(wpa_s, scan_res);
9ba9fa07 2414
f0d0a5d2
MA		 2415 for (i = 0; i < scan_res->num; i++) {
2416 struct wpa_scan_res *scan_res_item = scan_res->res[i];
2417
a1b790eb
JM		 2418 scan_snr(scan_res_item);
2419 scan_est_throughput(wpa_s, scan_res_item);
f0d0a5d2
MA		 2420 }
2421
41e650ae 2422#ifdef CONFIG_WPS
3187fd90 2423 if (wpas_wps_searching(wpa_s)) {
f049052b
BG		 2424 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
2425 "provisioning rules");
41e650ae
JM		 2426 compar = wpa_scan_result_wps_compar;
2427 }
2428#endif /* CONFIG_WPS */
2429
33111c91
JC		 2430 if (scan_res->res) {
2431 qsort(scan_res->res, scan_res->num,
2432 sizeof(struct wpa_scan_res *), compar);
2433 }
aa820e02 2434 dump_scan_res(scan_res);
9ba9fa07 2435
6e374bd4
JM		 2436 if (wpa_s->ignore_post_flush_scan_res) {
2437 /* FLUSH command aborted an ongoing scan and these are the
2438 * results from the aborted scan. Do not process the results to
2439 * maintain flushed state. */
2440 wpa_dbg(wpa_s, MSG_DEBUG,
2441 "Do not update BSS table based on pending post-FLUSH scan results");
2442 wpa_s->ignore_post_flush_scan_res = 0;
2443 return scan_res;
2444 }
2445
9ba9fa07
JM		 2446 wpa_bss_update_start(wpa_s);
2447 for (i = 0; i < scan_res->num; i++)
c5f10e80
JM		 2448 wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
2449 &scan_res->fetch_time);
9ba9fa07
JM		 2450 wpa_bss_update_end(wpa_s, info, new_scan);
2451
2452 return scan_res;
2453}
2454
2455
2c09af30
JM		 2456/**
2457 * wpa_supplicant_update_scan_results - Update scan results from the driver
2458 * @wpa_s: Pointer to wpa_supplicant data
2459 * Returns: 0 on success, -1 on failure
2460 *
2461 * This function updates the BSS table within wpa_supplicant based on the
2462 * currently available scan results from the driver without requesting a new
2463 * scan. This is used in cases where the driver indicates an association
2464 * (including roaming within ESS) and wpa_supplicant does not yet have the
2465 * needed information to complete the connection (e.g., to perform validation
2466 * steps in 4-way handshake).
2467 */
9ba9fa07
JM		 2468int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
2469{
2470 struct wpa_scan_results *scan_res;
2471 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
2472 if (scan_res == NULL)
2473 return -1;
2474 wpa_scan_results_free(scan_res);
2475
2476 return 0;
2477}
66fe0f70
DS		 2478
2479
2480/**
2481 * scan_only_handler - Reports scan results
2482 */
2483void scan_only_handler(struct wpa_supplicant *wpa_s,
2484 struct wpa_scan_results *scan_res)
2485{
2486 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
d81c73be
JM		 2487 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2488 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
2489 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
2490 wpa_s->manual_scan_id);
2491 wpa_s->manual_scan_use_id = 0;
2492 } else {
2493 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
2494 }
66fe0f70
DS		 2495 wpas_notify_scan_results(wpa_s);
2496 wpas_notify_scan_done(wpa_s, 1);
d12a51b5
JM		 2497 if (wpa_s->scan_work) {
2498 struct wpa_radio_work *work = wpa_s->scan_work;
2499 wpa_s->scan_work = NULL;
2500 radio_work_done(work);
2501 }
ea6030c7
JM		 2502
2503 if (wpa_s->wpa_state == WPA_SCANNING)
2504 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
66fe0f70 2505}
407be00b
JM		 2506
2507
2508int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
2509{
2510 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
2511}
dd43aaa5
JM		 2512
2513
2514struct wpa_driver_scan_params *
2515wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
2516{
2517 struct wpa_driver_scan_params *params;
2518 size_t i;
2519 u8 *n;
2520
2521 params = os_zalloc(sizeof(*params));
2522 if (params == NULL)
2523 return NULL;
2524
2525 for (i = 0; i < src->num_ssids; i++) {
2526 if (src->ssids[i].ssid) {
a1f11e34
JB		 2527 n = os_memdup(src->ssids[i].ssid,
2528 src->ssids[i].ssid_len);
dd43aaa5
JM		 2529 if (n == NULL)
2530 goto failed;
dd43aaa5
JM		 2531 params->ssids[i].ssid = n;
2532 params->ssids[i].ssid_len = src->ssids[i].ssid_len;
2533 }
2534 }
2535 params->num_ssids = src->num_ssids;
2536
2537 if (src->extra_ies) {
a1f11e34 2538 n = os_memdup(src->extra_ies, src->extra_ies_len);
dd43aaa5
JM		 2539 if (n == NULL)
2540 goto failed;
dd43aaa5
JM		 2541 params->extra_ies = n;
2542 params->extra_ies_len = src->extra_ies_len;
2543 }
2544
2545 if (src->freqs) {
2546 int len = int_array_len(src->freqs);
a1f11e34 2547 params->freqs = os_memdup(src->freqs, (len + 1) * sizeof(int));
dd43aaa5
JM		 2548 if (params->freqs == NULL)
2549 goto failed;
dd43aaa5
JM		 2550 }
2551
2552 if (src->filter_ssids) {
a1f11e34
JB		 2553 params->filter_ssids = os_memdup(src->filter_ssids,
2554 sizeof(*params->filter_ssids) *
dd43aaa5
JM		 2555 src->num_filter_ssids);
2556 if (params->filter_ssids == NULL)
2557 goto failed;
dd43aaa5
JM		 2558 params->num_filter_ssids = src->num_filter_ssids;
2559 }
2560
2561 params->filter_rssi = src->filter_rssi;
2562 params->p2p_probe = src->p2p_probe;
2563 params->only_new_results = src->only_new_results;
57a8f8af 2564 params->low_priority = src->low_priority;
c16b9f8d
AS		 2565 params->duration = src->duration;
2566 params->duration_mandatory = src->duration_mandatory;
938dd97a 2567 params->oce_scan = src->oce_scan;
dd43aaa5 2568
09ea4309
AS		 2569 if (src->sched_scan_plans_num > 0) {
2570 params->sched_scan_plans =
a1f11e34
JB		 2571 os_memdup(src->sched_scan_plans,
2572 sizeof(*src->sched_scan_plans) *
09ea4309
AS		 2573 src->sched_scan_plans_num);
2574 if (!params->sched_scan_plans)
2575 goto failed;
2576
09ea4309
AS		 2577 params->sched_scan_plans_num = src->sched_scan_plans_num;
2578 }
2579
bb66d467
EC		 2580 if (src->mac_addr_rand &&
2581 wpa_setup_mac_addr_rand_params(params, src->mac_addr))
2582 goto failed;
eb20cea5
JM		 2583
2584 if (src->bssid) {
2585 u8 *bssid;
2586
a1f11e34 2587 bssid = os_memdup(src->bssid, ETH_ALEN);
eb20cea5
JM		 2588 if (!bssid)
2589 goto failed;
eb20cea5
JM		 2590 params->bssid = bssid;
2591 }
2592
57c3a605 2593 params->relative_rssi_set = src->relative_rssi_set;
2594 params->relative_rssi = src->relative_rssi;
2595 params->relative_adjust_band = src->relative_adjust_band;
2596 params->relative_adjust_rssi = src->relative_adjust_rssi;
dd43aaa5
JM		 2597 return params;
2598
2599failed:
2600 wpa_scan_free_params(params);
2601 return NULL;
2602}
2603
2604
2605void wpa_scan_free_params(struct wpa_driver_scan_params *params)
2606{
2607 size_t i;
2608
2609 if (params == NULL)
2610 return;
2611
2612 for (i = 0; i < params->num_ssids; i++)
2613 os_free((u8 *) params->ssids[i].ssid);
2614 os_free((u8 *) params->extra_ies);
2615 os_free(params->freqs);
2616 os_free(params->filter_ssids);
09ea4309 2617 os_free(params->sched_scan_plans);
56c76fa5
IP		 2618
2619 /*
2620 * Note: params->mac_addr_mask points to same memory allocation and
2621 * must not be freed separately.
2622 */
2623 os_free((u8 *) params->mac_addr);
2624
eb20cea5
JM		 2625 os_free((u8 *) params->bssid);
2626
dd43aaa5
JM		 2627 os_free(params);
2628}
737e7a08
AB		 2629
2630
2631int wpas_start_pno(struct wpa_supplicant *wpa_s)
2632{
d2d16e31
JM		 2633 int ret;
2634 size_t prio, i, num_ssid, num_match_ssid;
737e7a08
AB		 2635 struct wpa_ssid *ssid;
2636 struct wpa_driver_scan_params params;
32c02261 2637 struct sched_scan_plan scan_plan;
f89c32e6 2638 unsigned int max_sched_scan_ssids;
737e7a08 2639
5e3ddf4d
AB		 2640 if (!wpa_s->sched_scan_supported)
2641 return -1;
2642
f89c32e6
DS		 2643 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
2644 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
2645 else
2646 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
2647 if (max_sched_scan_ssids < 1)
2648 return -1;
2649
737e7a08
AB		 2650 if (wpa_s->pno || wpa_s->pno_sched_pending)
2651 return 0;
2652
2653 if ((wpa_s->wpa_state > WPA_SCANNING) &&
b4fd1f0e 2654 (wpa_s->wpa_state < WPA_COMPLETED)) {
737e7a08
AB		 2655 wpa_printf(MSG_ERROR, "PNO: In assoc process");
2656 return -EAGAIN;
2657 }
2658
2659 if (wpa_s->wpa_state == WPA_SCANNING) {
2660 wpa_supplicant_cancel_scan(wpa_s);
2661 if (wpa_s->sched_scanning) {
2662 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
2663 "ongoing sched scan");
2664 wpa_supplicant_cancel_sched_scan(wpa_s);
2665 wpa_s->pno_sched_pending = 1;
2666 return 0;
2667 }
2668 }
2669
5ac8f862
AS		 2670 if (wpa_s->sched_scan_stop_req) {
2671 wpa_printf(MSG_DEBUG,
2672 "Schedule PNO after previous sched scan has stopped");
2673 wpa_s->pno_sched_pending = 1;
2674 return 0;
2675 }
2676
737e7a08
AB		 2677 os_memset(&params, 0, sizeof(params));
2678
4ed34922 2679 num_ssid = num_match_ssid = 0;
737e7a08
AB		 2680 ssid = wpa_s->conf->ssid;
2681 while (ssid) {
4ed34922
DS		 2682 if (!wpas_network_disabled(wpa_s, ssid)) {
2683 num_match_ssid++;
2684 if (ssid->scan_ssid)
2685 num_ssid++;
2686 }
737e7a08
AB		 2687 ssid = ssid->next;
2688 }
4ed34922
DS		 2689
2690 if (num_match_ssid == 0) {
2691 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
2692 return -1;
2693 }
2694
2695 if (num_match_ssid > num_ssid) {
2696 params.num_ssids++; /* wildcard */
2697 num_ssid++;
2698 }
2699
f89c32e6 2700 if (num_ssid > max_sched_scan_ssids) {
737e7a08 2701 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
f89c32e6
DS		 2702 "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
2703 num_ssid = max_sched_scan_ssids;
737e7a08
AB		 2704 }
2705
4ed34922
DS		 2706 if (num_match_ssid > wpa_s->max_match_sets) {
2707 num_match_ssid = wpa_s->max_match_sets;
2708 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
737e7a08 2709 }
4ed34922
DS		 2710 params.filter_ssids = os_calloc(num_match_ssid,
2711 sizeof(struct wpa_driver_scan_filter));
737e7a08
AB		 2712 if (params.filter_ssids == NULL)
2713 return -1;
6f5e1b0b 2714
737e7a08 2715 i = 0;
6f5e1b0b
DS		 2716 prio = 0;
2717 ssid = wpa_s->conf->pssid[prio];
737e7a08
AB		 2718 while (ssid) {
2719 if (!wpas_network_disabled(wpa_s, ssid)) {
4ed34922
DS		 2720 if (ssid->scan_ssid && params.num_ssids < num_ssid) {
2721 params.ssids[params.num_ssids].ssid =
2722 ssid->ssid;
2723 params.ssids[params.num_ssids].ssid_len =
2724 ssid->ssid_len;
2725 params.num_ssids++;
2726 }
737e7a08
AB		 2727 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
2728 ssid->ssid_len);
2729 params.filter_ssids[i].ssid_len = ssid->ssid_len;
2730 params.num_filter_ssids++;
2731 i++;
4ed34922 2732 if (i == num_match_ssid)
737e7a08
AB		 2733 break;
2734 }
6f5e1b0b
DS		 2735 if (ssid->pnext)
2736 ssid = ssid->pnext;
2737 else if (prio + 1 == wpa_s->conf->num_prio)
2738 break;
2739 else
2740 ssid = wpa_s->conf->pssid[++prio];
737e7a08
AB		 2741 }
2742
2743 if (wpa_s->conf->filter_rssi)
2744 params.filter_rssi = wpa_s->conf->filter_rssi;
2745
32c02261
AS		 2746 if (wpa_s->sched_scan_plans_num) {
2747 params.sched_scan_plans = wpa_s->sched_scan_plans;
2748 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
2749 } else {
2750 /* Set one scan plan that will run infinitely */
2751 if (wpa_s->conf->sched_scan_interval)
2752 scan_plan.interval = wpa_s->conf->sched_scan_interval;
2753 else
2754 scan_plan.interval = 10;
2755
2756 scan_plan.iterations = 0;
2757 params.sched_scan_plans = &scan_plan;
2758 params.sched_scan_plans_num = 1;
2759 }
737e7a08 2760
d0330d57
PK		 2761 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
2762
d3c9c35f
DS		 2763 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
2764 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
2765 params.freqs = wpa_s->manual_sched_scan_freqs;
2766 }
2767
346b333d 2768 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) &&
bb66d467
EC		 2769 wpa_s->wpa_state <= WPA_SCANNING)
2770 wpa_setup_mac_addr_rand_params(&params, wpa_s->mac_addr_pno);
56c76fa5 2771
57c3a605 2772 wpa_scan_set_relative_rssi_params(wpa_s, &params);
2773
32c02261 2774 ret = wpa_supplicant_start_sched_scan(wpa_s, &params);
737e7a08 2775 os_free(params.filter_ssids);
bb66d467 2776 os_free(params.mac_addr);
737e7a08
AB		 2777 if (ret == 0)
2778 wpa_s->pno = 1;
5e3ddf4d
AB		 2779 else
2780 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
737e7a08
AB		 2781 return ret;
2782}
2783
2784
2785int wpas_stop_pno(struct wpa_supplicant *wpa_s)
2786{
2787 int ret = 0;
2788
5e3ddf4d
AB		 2789 if (!wpa_s->pno)
2790 return 0;
2791
2792 ret = wpa_supplicant_stop_sched_scan(wpa_s);
14f34a73 2793 wpa_s->sched_scan_stop_req = 1;
737e7a08 2794
5e3ddf4d 2795 wpa_s->pno = 0;
737e7a08
AB		 2796 wpa_s->pno_sched_pending = 0;
2797
2798 if (wpa_s->wpa_state == WPA_SCANNING)
2799 wpa_supplicant_req_scan(wpa_s, 0, 0);
2800
2801 return ret;
2802}
56c76fa5
IP		 2803
2804
2805void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
2806 unsigned int type)
2807{
2808 type &= MAC_ADDR_RAND_ALL;
2809 wpa_s->mac_addr_rand_enable &= ~type;
2810
2811 if (type & MAC_ADDR_RAND_SCAN) {
2812 os_free(wpa_s->mac_addr_scan);
2813 wpa_s->mac_addr_scan = NULL;
2814 }
2815
2816 if (type & MAC_ADDR_RAND_SCHED_SCAN) {
2817 os_free(wpa_s->mac_addr_sched_scan);
2818 wpa_s->mac_addr_sched_scan = NULL;
2819 }
2820
2821 if (type & MAC_ADDR_RAND_PNO) {
2822 os_free(wpa_s->mac_addr_pno);
2823 wpa_s->mac_addr_pno = NULL;
2824 }
2825}
2826
2827
2828int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
2829 unsigned int type, const u8 *addr,
2830 const u8 *mask)
2831{
2832 u8 *tmp = NULL;
2833
1e591df0
LD		 2834 if ((wpa_s->mac_addr_rand_supported & type) != type ) {
2835 wpa_printf(MSG_INFO,
2836 "scan: MAC randomization type %u != supported=%u",
2837 type, wpa_s->mac_addr_rand_supported);
2838 return -1;
2839 }
2840
56c76fa5
IP		 2841 wpas_mac_addr_rand_scan_clear(wpa_s, type);
2842
2843 if (addr) {
2844 tmp = os_malloc(2 * ETH_ALEN);
2845 if (!tmp)
2846 return -1;
2847 os_memcpy(tmp, addr, ETH_ALEN);
2848 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
2849 }
2850
2851 if (type == MAC_ADDR_RAND_SCAN) {
2852 wpa_s->mac_addr_scan = tmp;
2853 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
2854 wpa_s->mac_addr_sched_scan = tmp;
2855 } else if (type == MAC_ADDR_RAND_PNO) {
2856 wpa_s->mac_addr_pno = tmp;
2857 } else {
2858 wpa_printf(MSG_INFO,
2859 "scan: Invalid MAC randomization type=0x%x",
2860 type);
2861 os_free(tmp);
2862 return -1;
2863 }
2864
2865 wpa_s->mac_addr_rand_enable |= type;
2866 return 0;
2867}
4ead7cfd
KV		 2868
2869
10f8351d
EC		 2870int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s,
2871 unsigned int type, u8 *mask)
2872{
2873 const u8 *to_copy;
2874
2875 if ((wpa_s->mac_addr_rand_enable & type) != type)
2876 return -1;
2877
2878 if (type == MAC_ADDR_RAND_SCAN) {
2879 to_copy = wpa_s->mac_addr_scan;
2880 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
2881 to_copy = wpa_s->mac_addr_sched_scan;
2882 } else if (type == MAC_ADDR_RAND_PNO) {
2883 to_copy = wpa_s->mac_addr_pno;
2884 } else {
2885 wpa_printf(MSG_DEBUG,
2886 "scan: Invalid MAC randomization type=0x%x",
2887 type);
2888 return -1;
2889 }
2890
2891 os_memcpy(mask, to_copy + ETH_ALEN, ETH_ALEN);
2892 return 0;
2893}
2894
2895
4ead7cfd
KV		 2896int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
2897{
bf88401d
SD		 2898 struct wpa_radio_work *work;
2899 struct wpa_radio *radio = wpa_s->radio;
a8057310 2900
bf88401d
SD		 2901 dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) {
2902 if (work->wpa_s != wpa_s || !work->started ||
2903 (os_strcmp(work->type, "scan") != 0 &&
2904 os_strcmp(work->type, "p2p-scan") != 0))
2905 continue;
4ead7cfd 2906 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
bf88401d 2907 return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie);
4ead7cfd
KV		 2908 }
2909
bf88401d
SD		 2910 wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort");
2911 return -1;
4ead7cfd 2912}
32c02261
AS		 2913
2914
2915int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
2916{
2917 struct sched_scan_plan *scan_plans = NULL;
2918 const char *token, *context = NULL;
2919 unsigned int num = 0;
2920
2921 if (!cmd)
2922 return -1;
2923
bea48f77
JM		 2924 if (!cmd[0]) {
2925 wpa_printf(MSG_DEBUG, "Clear sched scan plans");
2926 os_free(wpa_s->sched_scan_plans);
2927 wpa_s->sched_scan_plans = NULL;
2928 wpa_s->sched_scan_plans_num = 0;
2929 return 0;
2930 }
2931
32c02261
AS		 2932 while ((token = cstr_token(cmd, " ", &context))) {
2933 int ret;
2934 struct sched_scan_plan *scan_plan, *n;
2935
2936 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
2937 if (!n)
2938 goto fail;
2939
2940 scan_plans = n;
2941 scan_plan = &scan_plans[num];
2942 num++;
2943
2944 ret = sscanf(token, "%u:%u", &scan_plan->interval,
2945 &scan_plan->iterations);
2946 if (ret <= 0 || ret > 2 || !scan_plan->interval) {
2947 wpa_printf(MSG_ERROR,
2948 "Invalid sched scan plan input: %s", token);
2949 goto fail;
2950 }
2951
32c02261
AS		 2952 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
2953 wpa_printf(MSG_WARNING,
2954 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
2955 num, scan_plan->interval,
2956 wpa_s->max_sched_scan_plan_interval);
2957 scan_plan->interval =
2958 wpa_s->max_sched_scan_plan_interval;
2959 }
2960
2961 if (ret == 1) {
2962 scan_plan->iterations = 0;
2963 break;
2964 }
2965
2966 if (!scan_plan->iterations) {
2967 wpa_printf(MSG_ERROR,
2968 "scan plan %u: Number of iterations cannot be zero",
2969 num);
2970 goto fail;
2971 }
2972
2973 if (scan_plan->iterations >
2974 wpa_s->max_sched_scan_plan_iterations) {
2975 wpa_printf(MSG_WARNING,
2976 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
2977 num, scan_plan->iterations,
2978 wpa_s->max_sched_scan_plan_iterations);
2979 scan_plan->iterations =
2980 wpa_s->max_sched_scan_plan_iterations;
2981 }
2982
2983 wpa_printf(MSG_DEBUG,
2984 "scan plan %u: interval=%u iterations=%u",
2985 num, scan_plan->interval, scan_plan->iterations);
2986 }
2987
2988 if (!scan_plans) {
2989 wpa_printf(MSG_ERROR, "Invalid scan plans entry");
2990 goto fail;
2991 }
2992
2993 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
2994 wpa_printf(MSG_ERROR,
2995 "All scan plans but the last must specify a number of iterations");
2996 goto fail;
2997 }
2998
2999 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
3000 num, scan_plans[num - 1].interval);
3001
3002 if (num > wpa_s->max_sched_scan_plans) {
3003 wpa_printf(MSG_WARNING,
3004 "Too many scheduled scan plans (only %u supported)",
3005 wpa_s->max_sched_scan_plans);
3006 wpa_printf(MSG_WARNING,
3007 "Use only the first %u scan plans, and the last one (in infinite loop)",
3008 wpa_s->max_sched_scan_plans - 1);
3009 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
3010 &scan_plans[num - 1], sizeof(*scan_plans));
3011 num = wpa_s->max_sched_scan_plans;
3012 }
3013
3014 os_free(wpa_s->sched_scan_plans);
3015 wpa_s->sched_scan_plans = scan_plans;
3016 wpa_s->sched_scan_plans_num = num;
3017
3018 return 0;
3019
3020fail:
3021 os_free(scan_plans);
3022 wpa_printf(MSG_ERROR, "invalid scan plans list");
3023 return -1;
3024}
be7ebd89
MS		 3025
3026
3027/**
3028 * wpas_scan_reset_sched_scan - Reset sched_scan state
3029 * @wpa_s: Pointer to wpa_supplicant data
3030 *
3031 * This function is used to cancel a running scheduled scan and to reset an
3032 * internal scan state to continue with a regular scan on the following
3033 * wpa_supplicant_req_scan() calls.
3034 */
3035void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s)
3036{
3037 wpa_s->normal_scans = 0;
3038 if (wpa_s->sched_scanning) {
3039 wpa_s->sched_scan_timed_out = 0;
3040 wpa_s->prev_sched_ssid = NULL;
3041 wpa_supplicant_cancel_sched_scan(wpa_s);
3042 }
3043}
5bb7327a
JM		 3044
3045
3046void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s)
3047{
3048 /* simulate timeout to restart the sched scan */
3049 wpa_s->sched_scan_timed_out = 1;
3050 wpa_s->prev_sched_ssid = NULL;
3051 wpa_supplicant_cancel_sched_scan(wpa_s);
3052}
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