1 /*
2 * WPA Supplicant - Scanning
3 * Copyright (c) 2003-2019, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/wpa_ctrl.h"
15 #include "config.h"
16 #include "wpa_supplicant_i.h"
17 #include "driver_i.h"
18 #include "wps_supplicant.h"
19 #include "p2p_supplicant.h"
20 #include "p2p/p2p.h"
21 #include "hs20_supplicant.h"
22 #include "notify.h"
23 #include "bss.h"
24 #include "scan.h"
25 #include "mesh.h"
26
27
wpa_supplicant_gen_assoc_event(struct wpa_supplicant * wpa_s)28 static 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
37 if (wpa_s->current_ssid == NULL) {
38 wpa_s->current_ssid = ssid;
39 wpas_notify_network_changed(wpa_s);
40 }
41 wpa_supplicant_initiate_eapol(wpa_s);
42 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured "
43 "network - generating associated event");
44 os_memset(&data, 0, sizeof(data));
45 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
46 }
47
48
49 #ifdef CONFIG_WPS
wpas_wps_in_use(struct wpa_supplicant * wpa_s,enum wps_request_type * req_type)50 static int wpas_wps_in_use(struct wpa_supplicant *wpa_s,
51 enum wps_request_type *req_type)
52 {
53 struct wpa_ssid *ssid;
54 int wps = 0;
55
56 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
57 if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
58 continue;
59
60 wps = 1;
61 *req_type = wpas_wps_get_req_type(ssid);
62 if (ssid->eap.phase1 && os_strstr(ssid->eap.phase1, "pbc=1"))
63 return 2;
64 }
65
66 #ifdef CONFIG_P2P
67 if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
68 !wpa_s->conf->p2p_disabled) {
69 wpa_s->wps->dev.p2p = 1;
70 if (!wps) {
71 wps = 1;
72 *req_type = WPS_REQ_ENROLLEE_INFO;
73 }
74 }
75 #endif /* CONFIG_P2P */
76
77 return wps;
78 }
79 #endif /* CONFIG_WPS */
80
81
wpa_setup_mac_addr_rand_params(struct wpa_driver_scan_params * params,const u8 * mac_addr)82 static 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
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 */
wpa_supplicant_enabled_networks(struct wpa_supplicant * wpa_s)118 int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
119 {
120 struct wpa_ssid *ssid = wpa_s->conf->ssid;
121 int count = 0, disabled = 0;
122
123 if (wpa_s->p2p_mgmt)
124 return 0; /* no normal network profiles on p2p_mgmt interface */
125
126 while (ssid) {
127 if (!wpas_network_disabled(wpa_s, ssid))
128 count++;
129 else
130 disabled++;
131 ssid = ssid->next;
132 }
133 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
134 wpa_s->conf->auto_interworking)
135 count++;
136 if (count == 0 && disabled > 0) {
137 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled "
138 "networks)", disabled);
139 }
140 return count;
141 }
142
143
wpa_supplicant_assoc_try(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)144 static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
145 struct wpa_ssid *ssid)
146 {
147 int min_temp_disabled = 0;
148
149 while (ssid) {
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 }
160 ssid = ssid->next;
161 }
162
163 /* ap_scan=2 mode - try to associate with each SSID. */
164 if (ssid == NULL) {
165 wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
166 "end of scan list - go back to beginning");
167 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
168 wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0);
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. */
176 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
177 }
178 wpa_supplicant_associate(wpa_s, NULL, ssid);
179 }
180
181
wpas_trigger_scan_cb(struct wpa_radio_work * work,int deinit)182 static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
183 {
184 struct wpa_supplicant *wpa_s = work->wpa_s;
185 struct wpa_driver_scan_params *params = work->ctx;
186 int ret;
187
188 if (deinit) {
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;
196 return;
197 }
198
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
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");
206 wpa_scan_free_params(params);
207 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
208 radio_work_done(work);
209 return;
210 }
211
212 wpa_supplicant_notify_scanning(wpa_s, 1);
213
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");
217 params->only_new_results = 1;
218 }
219 ret = wpa_drv_scan(wpa_s, params);
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;
231 wpa_scan_free_params(params);
232 work->ctx = NULL;
233 if (ret) {
234 int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
235 !wpa_s->beacon_rep_data.token;
236
237 if (wpa_s->disconnected)
238 retry = 0;
239
240 /* do not retry if operation is not supported */
241 if (ret == -EOPNOTSUPP)
242 retry = 0;
243
244 wpa_supplicant_notify_scanning(wpa_s, 0);
245 wpas_notify_scan_done(wpa_s, 0);
246 if (wpa_s->wpa_state == WPA_SCANNING)
247 wpa_supplicant_set_state(wpa_s,
248 wpa_s->scan_prev_wpa_state);
249 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s",
250 ret, retry ? " retry=1" : "");
251 radio_work_done(work);
252
253 if (retry) {
254 /* Restore scan_req since we will try to scan again */
255 wpa_s->scan_req = wpa_s->last_scan_req;
256 wpa_supplicant_req_scan(wpa_s, 1, 0);
257 } else if (wpa_s->scan_res_handler) {
258 /* Clear the scan_res_handler */
259 wpa_s->scan_res_handler = NULL;
260 }
261
262 if (wpa_s->beacon_rep_data.token)
263 wpas_rrm_refuse_request(wpa_s);
264
265 return;
266 }
267
268 os_get_reltime(&wpa_s->scan_trigger_time);
269 wpa_s->scan_runs++;
270 wpa_s->normal_scans++;
271 wpa_s->own_scan_requested = 1;
272 wpa_s->clear_driver_scan_cache = 0;
273 wpa_s->scan_work = work;
274 }
275
276
277 /**
278 * wpa_supplicant_trigger_scan - Request driver to start a scan
279 * @wpa_s: Pointer to wpa_supplicant data
280 * @params: Scan parameters
281 * Returns: 0 on success, -1 on failure
282 */
wpa_supplicant_trigger_scan(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)283 int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s,
284 struct wpa_driver_scan_params *params)
285 {
286 struct wpa_driver_scan_params *ctx;
287
288 if (wpa_s->scan_work) {
289 wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending");
290 return -1;
291 }
292
293 ctx = wpa_scan_clone_params(params);
294 if (!ctx ||
295 radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0)
296 {
297 wpa_scan_free_params(ctx);
298 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=-1");
299 return -1;
300 }
301
302 return 0;
303 }
304
305
306 static void
wpa_supplicant_delayed_sched_scan_timeout(void * eloop_ctx,void * timeout_ctx)307 wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
308 {
309 struct wpa_supplicant *wpa_s = eloop_ctx;
310
311 wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan");
312
313 if (wpa_supplicant_req_sched_scan(wpa_s))
314 wpa_supplicant_req_scan(wpa_s, 0, 0);
315 }
316
317
318 static void
wpa_supplicant_sched_scan_timeout(void * eloop_ctx,void * timeout_ctx)319 wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx)
320 {
321 struct wpa_supplicant *wpa_s = eloop_ctx;
322
323 wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it");
324
325 wpa_s->sched_scan_timed_out = 1;
326 wpa_supplicant_cancel_sched_scan(wpa_s);
327 }
328
329
330 static int
wpa_supplicant_start_sched_scan(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)331 wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s,
332 struct wpa_driver_scan_params *params)
333 {
334 int ret;
335
336 wpa_supplicant_notify_scanning(wpa_s, 1);
337 ret = wpa_drv_sched_scan(wpa_s, params);
338 if (ret)
339 wpa_supplicant_notify_scanning(wpa_s, 0);
340 else
341 wpa_s->sched_scanning = 1;
342
343 return ret;
344 }
345
346
wpa_supplicant_stop_sched_scan(struct wpa_supplicant * wpa_s)347 static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s)
348 {
349 int ret;
350
351 ret = wpa_drv_stop_sched_scan(wpa_s);
352 if (ret) {
353 wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!");
354 /* TODO: what to do if stopping fails? */
355 return -1;
356 }
357
358 return ret;
359 }
360
361
362 static struct wpa_driver_scan_filter *
wpa_supplicant_build_filter_ssids(struct wpa_config * conf,size_t * num_ssids)363 wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids)
364 {
365 struct wpa_driver_scan_filter *ssids;
366 struct wpa_ssid *ssid;
367 size_t count;
368
369 *num_ssids = 0;
370 if (!conf->filter_ssids)
371 return NULL;
372
373 for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) {
374 if (ssid->ssid && ssid->ssid_len)
375 count++;
376 }
377 if (count == 0)
378 return NULL;
379 ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter));
380 if (ssids == NULL)
381 return NULL;
382
383 for (ssid = conf->ssid; ssid; ssid = ssid->next) {
384 if (!ssid->ssid || !ssid->ssid_len)
385 continue;
386 os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len);
387 ssids[*num_ssids].ssid_len = ssid->ssid_len;
388 (*num_ssids)++;
389 }
390
391 return ssids;
392 }
393
394
395 #ifdef CONFIG_P2P
is_6ghz_supported(struct wpa_supplicant * wpa_s)396 static bool is_6ghz_supported(struct wpa_supplicant *wpa_s)
397 {
398 struct hostapd_channel_data *chnl;
399 int i, j;
400
401 for (i = 0; i < wpa_s->hw.num_modes; i++) {
402 if (wpa_s->hw.modes[i].mode == HOSTAPD_MODE_IEEE80211A) {
403 chnl = wpa_s->hw.modes[i].channels;
404 for (j = 0; j < wpa_s->hw.modes[i].num_channels; j++) {
405 if (chnl[j].flag & HOSTAPD_CHAN_DISABLED)
406 continue;
407 if (is_6ghz_freq(chnl[j].freq))
408 return true;
409 }
410 }
411 }
412
413 return false;
414 }
415 #endif /* CONFIG_P2P */
416
417
wpa_supplicant_optimize_freqs(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)418 static void wpa_supplicant_optimize_freqs(
419 struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params)
420 {
421 #ifdef CONFIG_P2P
422 if (params->freqs == NULL && wpa_s->p2p_in_provisioning &&
423 wpa_s->go_params) {
424 /* Optimize provisioning state scan based on GO information */
425 if (wpa_s->p2p_in_provisioning < 5 &&
426 wpa_s->go_params->freq > 0) {
427 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO "
428 "preferred frequency %d MHz",
429 wpa_s->go_params->freq);
430 params->freqs = os_calloc(2, sizeof(int));
431 if (params->freqs)
432 params->freqs[0] = wpa_s->go_params->freq;
433 } else if (wpa_s->p2p_in_provisioning < 8 &&
434 wpa_s->go_params->freq_list[0]) {
435 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common "
436 "channels");
437 int_array_concat(¶ms->freqs,
438 wpa_s->go_params->freq_list);
439 if (params->freqs)
440 int_array_sort_unique(params->freqs);
441 }
442 wpa_s->p2p_in_provisioning++;
443 }
444
445 if (params->freqs == NULL && wpa_s->p2p_in_invitation) {
446 /*
447 * Optimize scan based on GO information during persistent
448 * group reinvocation
449 */
450 if (wpa_s->p2p_in_invitation < 5 &&
451 wpa_s->p2p_invite_go_freq > 0) {
452 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation",
453 wpa_s->p2p_invite_go_freq);
454 params->freqs = os_calloc(2, sizeof(int));
455 if (params->freqs)
456 params->freqs[0] = wpa_s->p2p_invite_go_freq;
457 }
458 wpa_s->p2p_in_invitation++;
459 if (wpa_s->p2p_in_invitation > 20) {
460 /*
461 * This should not really happen since the variable is
462 * cleared on group removal, but if it does happen, make
463 * sure we do not get stuck in special invitation scan
464 * mode.
465 */
466 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation");
467 wpa_s->p2p_in_invitation = 0;
468 }
469 }
470 #endif /* CONFIG_P2P */
471
472 #ifdef CONFIG_WPS
473 if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) {
474 /*
475 * Optimize post-provisioning scan based on channel used
476 * during provisioning.
477 */
478 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz "
479 "that was used during provisioning", wpa_s->wps_freq);
480 params->freqs = os_calloc(2, sizeof(int));
481 if (params->freqs)
482 params->freqs[0] = wpa_s->wps_freq;
483 wpa_s->after_wps--;
484 } else if (wpa_s->after_wps)
485 wpa_s->after_wps--;
486
487 if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq)
488 {
489 /* Optimize provisioning scan based on already known channel */
490 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz",
491 wpa_s->wps_freq);
492 params->freqs = os_calloc(2, sizeof(int));
493 if (params->freqs)
494 params->freqs[0] = wpa_s->wps_freq;
495 wpa_s->known_wps_freq = 0; /* only do this once */
496 }
497 #endif /* CONFIG_WPS */
498 }
499
500
501 #ifdef CONFIG_INTERWORKING
wpas_add_interworking_elements(struct wpa_supplicant * wpa_s,struct wpabuf * buf)502 static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s,
503 struct wpabuf *buf)
504 {
505 wpabuf_put_u8(buf, WLAN_EID_INTERWORKING);
506 wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 :
507 1 + ETH_ALEN);
508 wpabuf_put_u8(buf, wpa_s->conf->access_network_type);
509 /* No Venue Info */
510 if (!is_zero_ether_addr(wpa_s->conf->hessid))
511 wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN);
512 }
513 #endif /* CONFIG_INTERWORKING */
514
515
516 #ifdef CONFIG_MBO
wpas_fils_req_param_add_max_channel(struct wpa_supplicant * wpa_s,struct wpabuf ** ie)517 static void wpas_fils_req_param_add_max_channel(struct wpa_supplicant *wpa_s,
518 struct wpabuf **ie)
519 {
520 if (wpabuf_resize(ie, 5)) {
521 wpa_printf(MSG_DEBUG,
522 "Failed to allocate space for FILS Request Parameters element");
523 return;
524 }
525
526 /* FILS Request Parameters element */
527 wpabuf_put_u8(*ie, WLAN_EID_EXTENSION);
528 wpabuf_put_u8(*ie, 3); /* FILS Request attribute length */
529 wpabuf_put_u8(*ie, WLAN_EID_EXT_FILS_REQ_PARAMS);
530 /* Parameter control bitmap */
531 wpabuf_put_u8(*ie, 0);
532 /* Max Channel Time field - contains the value of MaxChannelTime
533 * parameter of the MLME-SCAN.request primitive represented in units of
534 * TUs, as an unsigned integer. A Max Channel Time field value of 255
535 * is used to indicate any duration of more than 254 TUs, or an
536 * unspecified or unknown duration. (IEEE Std 802.11ai-2016, 9.4.2.178)
537 */
538 wpabuf_put_u8(*ie, 255);
539 }
540 #endif /* CONFIG_MBO */
541
542
wpa_supplicant_set_default_scan_ies(struct wpa_supplicant * wpa_s)543 void wpa_supplicant_set_default_scan_ies(struct wpa_supplicant *wpa_s)
544 {
545 struct wpabuf *default_ies = NULL;
546 u8 ext_capab[18];
547 int ext_capab_len, frame_id;
548 enum wpa_driver_if_type type = WPA_IF_STATION;
549
550 #ifdef CONFIG_P2P
551 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
552 type = WPA_IF_P2P_CLIENT;
553 #endif /* CONFIG_P2P */
554
555 wpa_drv_get_ext_capa(wpa_s, type);
556
557 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
558 sizeof(ext_capab));
559 if (ext_capab_len > 0 &&
560 wpabuf_resize(&default_ies, ext_capab_len) == 0)
561 wpabuf_put_data(default_ies, ext_capab, ext_capab_len);
562
563 #ifdef CONFIG_MBO
564 if (wpa_s->enable_oce & OCE_STA)
565 wpas_fils_req_param_add_max_channel(wpa_s, &default_ies);
566 /* Send MBO and OCE capabilities */
567 if (wpabuf_resize(&default_ies, 12) == 0)
568 wpas_mbo_scan_ie(wpa_s, default_ies);
569 #endif /* CONFIG_MBO */
570
571 if (type == WPA_IF_P2P_CLIENT)
572 frame_id = VENDOR_ELEM_PROBE_REQ_P2P;
573 else
574 frame_id = VENDOR_ELEM_PROBE_REQ;
575
576 if (wpa_s->vendor_elem[frame_id]) {
577 size_t len;
578
579 len = wpabuf_len(wpa_s->vendor_elem[frame_id]);
580 if (len > 0 && wpabuf_resize(&default_ies, len) == 0)
581 wpabuf_put_buf(default_ies,
582 wpa_s->vendor_elem[frame_id]);
583 }
584
585 if (default_ies)
586 wpa_drv_set_default_scan_ies(wpa_s, wpabuf_head(default_ies),
587 wpabuf_len(default_ies));
588 wpabuf_free(default_ies);
589 }
590
591
wpa_supplicant_extra_ies(struct wpa_supplicant * wpa_s)592 static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s)
593 {
594 struct wpabuf *extra_ie = NULL;
595 u8 ext_capab[18];
596 int ext_capab_len;
597 #ifdef CONFIG_WPS
598 int wps = 0;
599 enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
600 #endif /* CONFIG_WPS */
601
602 #ifdef CONFIG_P2P
603 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT)
604 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
605 else
606 #endif /* CONFIG_P2P */
607 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
608
609 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
610 sizeof(ext_capab));
611 if (ext_capab_len > 0 &&
612 wpabuf_resize(&extra_ie, ext_capab_len) == 0)
613 wpabuf_put_data(extra_ie, ext_capab, ext_capab_len);
614
615 #ifdef CONFIG_INTERWORKING
616 if (wpa_s->conf->interworking &&
617 wpabuf_resize(&extra_ie, 100) == 0)
618 wpas_add_interworking_elements(wpa_s, extra_ie);
619 #endif /* CONFIG_INTERWORKING */
620
621 #ifdef CONFIG_MBO
622 if (wpa_s->enable_oce & OCE_STA)
623 wpas_fils_req_param_add_max_channel(wpa_s, &extra_ie);
624 #endif /* CONFIG_MBO */
625
626 #ifdef CONFIG_WPS
627 wps = wpas_wps_in_use(wpa_s, &req_type);
628
629 if (wps) {
630 struct wpabuf *wps_ie;
631 wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON :
632 DEV_PW_DEFAULT,
633 &wpa_s->wps->dev,
634 wpa_s->wps->uuid, req_type,
635 0, NULL);
636 if (wps_ie) {
637 if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0)
638 wpabuf_put_buf(extra_ie, wps_ie);
639 wpabuf_free(wps_ie);
640 }
641 }
642
643 #ifdef CONFIG_P2P
644 if (wps) {
645 size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
646 if (wpabuf_resize(&extra_ie, ielen) == 0)
647 wpas_p2p_scan_ie(wpa_s, extra_ie);
648 }
649 #endif /* CONFIG_P2P */
650
651 wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie);
652
653 #endif /* CONFIG_WPS */
654
655 #ifdef CONFIG_HS20
656 if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 9) == 0)
657 wpas_hs20_add_indication(extra_ie, -1, 0);
658 #endif /* CONFIG_HS20 */
659
660 #ifdef CONFIG_FST
661 if (wpa_s->fst_ies &&
662 wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0)
663 wpabuf_put_buf(extra_ie, wpa_s->fst_ies);
664 #endif /* CONFIG_FST */
665
666 #ifdef CONFIG_MBO
667 /* Send MBO and OCE capabilities */
668 if (wpabuf_resize(&extra_ie, 12) == 0)
669 wpas_mbo_scan_ie(wpa_s, extra_ie);
670 #endif /* CONFIG_MBO */
671
672 if (wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ]) {
673 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_PROBE_REQ];
674
675 if (wpabuf_resize(&extra_ie, wpabuf_len(buf)) == 0)
676 wpabuf_put_buf(extra_ie, buf);
677 }
678
679 return extra_ie;
680 }
681
682
683 #ifdef CONFIG_P2P
684
685 /*
686 * Check whether there are any enabled networks or credentials that could be
687 * used for a non-P2P connection.
688 */
non_p2p_network_enabled(struct wpa_supplicant * wpa_s)689 static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s)
690 {
691 struct wpa_ssid *ssid;
692
693 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
694 if (wpas_network_disabled(wpa_s, ssid))
695 continue;
696 if (!ssid->p2p_group)
697 return 1;
698 }
699
700 if (wpa_s->conf->cred && wpa_s->conf->interworking &&
701 wpa_s->conf->auto_interworking)
702 return 1;
703
704 return 0;
705 }
706
707 #endif /* CONFIG_P2P */
708
709
wpa_add_scan_freqs_list(struct wpa_supplicant * wpa_s,enum hostapd_hw_mode band,struct wpa_driver_scan_params * params,bool is_6ghz)710 int wpa_add_scan_freqs_list(struct wpa_supplicant *wpa_s,
711 enum hostapd_hw_mode band,
712 struct wpa_driver_scan_params *params, bool is_6ghz)
713 {
714 /* Include only supported channels for the specified band */
715 struct hostapd_hw_modes *mode;
716 int num_chans = 0;
717 int *freqs, i;
718
719 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band, is_6ghz);
720 if (!mode)
721 return -1;
722
723 if (params->freqs) {
724 while (params->freqs[num_chans])
725 num_chans++;
726 }
727
728 freqs = os_realloc(params->freqs,
729 (num_chans + mode->num_channels + 1) * sizeof(int));
730 if (!freqs)
731 return -1;
732
733 params->freqs = freqs;
734 for (i = 0; i < mode->num_channels; i++) {
735 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
736 continue;
737 params->freqs[num_chans++] = mode->channels[i].freq;
738 }
739 params->freqs[num_chans] = 0;
740
741 return 0;
742 }
743
744
wpa_setband_scan_freqs(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)745 static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s,
746 struct wpa_driver_scan_params *params)
747 {
748 if (wpa_s->hw.modes == NULL)
749 return; /* unknown what channels the driver supports */
750 if (params->freqs)
751 return; /* already using a limited channel set */
752
753 if (wpa_s->setband_mask & WPA_SETBAND_5G)
754 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, params,
755 false);
756 if (wpa_s->setband_mask & WPA_SETBAND_2G)
757 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, params,
758 false);
759 if (wpa_s->setband_mask & WPA_SETBAND_6G)
760 wpa_add_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, params,
761 true);
762 }
763
764
wpa_add_scan_ssid(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params,size_t max_ssids,const u8 * ssid,size_t ssid_len)765 static void wpa_add_scan_ssid(struct wpa_supplicant *wpa_s,
766 struct wpa_driver_scan_params *params,
767 size_t max_ssids, const u8 *ssid, size_t ssid_len)
768 {
769 unsigned int j;
770
771 for (j = 0; j < params->num_ssids; j++) {
772 if (params->ssids[j].ssid_len == ssid_len &&
773 params->ssids[j].ssid &&
774 os_memcmp(params->ssids[j].ssid, ssid, ssid_len) == 0)
775 return; /* already in the list */
776 }
777
778 if (params->num_ssids + 1 > max_ssids) {
779 wpa_printf(MSG_DEBUG, "Over max scan SSIDs for manual request");
780 return;
781 }
782
783 wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s",
784 wpa_ssid_txt(ssid, ssid_len));
785
786 params->ssids[params->num_ssids].ssid = ssid;
787 params->ssids[params->num_ssids].ssid_len = ssid_len;
788 params->num_ssids++;
789 }
790
791
wpa_add_owe_scan_ssid(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params,struct wpa_ssid * ssid,size_t max_ssids)792 static void wpa_add_owe_scan_ssid(struct wpa_supplicant *wpa_s,
793 struct wpa_driver_scan_params *params,
794 struct wpa_ssid *ssid, size_t max_ssids)
795 {
796 #ifdef CONFIG_OWE
797 struct wpa_bss *bss;
798
799 if (!(ssid->key_mgmt & WPA_KEY_MGMT_OWE))
800 return;
801
802 wpa_printf(MSG_DEBUG, "OWE: Look for transition mode AP. ssid=%s",
803 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
804
805 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
806 const u8 *owe, *pos, *end;
807 const u8 *owe_ssid;
808 size_t owe_ssid_len;
809
810 if (bss->ssid_len != ssid->ssid_len ||
811 os_memcmp(bss->ssid, ssid->ssid, ssid->ssid_len) != 0)
812 continue;
813
814 owe = wpa_bss_get_vendor_ie(bss, OWE_IE_VENDOR_TYPE);
815 if (!owe || owe[1] < 4)
816 continue;
817
818 pos = owe + 6;
819 end = owe + 2 + owe[1];
820
821 /* Must include BSSID and ssid_len */
822 if (end - pos < ETH_ALEN + 1)
823 return;
824
825 /* Skip BSSID */
826 pos += ETH_ALEN;
827 owe_ssid_len = *pos++;
828 owe_ssid = pos;
829
830 if ((size_t) (end - pos) < owe_ssid_len ||
831 owe_ssid_len > SSID_MAX_LEN)
832 return;
833
834 wpa_printf(MSG_DEBUG,
835 "OWE: scan_ssids: transition mode OWE ssid=%s",
836 wpa_ssid_txt(owe_ssid, owe_ssid_len));
837
838 wpa_add_scan_ssid(wpa_s, params, max_ssids,
839 owe_ssid, owe_ssid_len);
840 return;
841 }
842 #endif /* CONFIG_OWE */
843 }
844
845
wpa_set_scan_ssids(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params,size_t max_ssids)846 static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s,
847 struct wpa_driver_scan_params *params,
848 size_t max_ssids)
849 {
850 unsigned int i;
851 struct wpa_ssid *ssid;
852
853 /*
854 * For devices with max_ssids greater than 1, leave the last slot empty
855 * for adding the wildcard scan entry.
856 */
857 max_ssids = max_ssids > 1 ? max_ssids - 1 : max_ssids;
858
859 for (i = 0; i < wpa_s->scan_id_count; i++) {
860 ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]);
861 if (!ssid)
862 continue;
863 if (ssid->scan_ssid)
864 wpa_add_scan_ssid(wpa_s, params, max_ssids,
865 ssid->ssid, ssid->ssid_len);
866 /*
867 * Also add the SSID of the OWE BSS, to allow discovery of
868 * transition mode APs more quickly.
869 */
870 wpa_add_owe_scan_ssid(wpa_s, params, ssid, max_ssids);
871 }
872
873 wpa_s->scan_id_count = 0;
874 }
875
876
wpa_set_ssids_from_scan_req(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params,size_t max_ssids)877 static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s,
878 struct wpa_driver_scan_params *params,
879 size_t max_ssids)
880 {
881 unsigned int i;
882
883 if (wpa_s->ssids_from_scan_req == NULL ||
884 wpa_s->num_ssids_from_scan_req == 0)
885 return 0;
886
887 if (wpa_s->num_ssids_from_scan_req > max_ssids) {
888 wpa_s->num_ssids_from_scan_req = max_ssids;
889 wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u",
890 (unsigned int) max_ssids);
891 }
892
893 for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) {
894 params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid;
895 params->ssids[i].ssid_len =
896 wpa_s->ssids_from_scan_req[i].ssid_len;
897 wpa_hexdump_ascii(MSG_DEBUG, "specific SSID",
898 params->ssids[i].ssid,
899 params->ssids[i].ssid_len);
900 }
901
902 params->num_ssids = wpa_s->num_ssids_from_scan_req;
903 wpa_s->num_ssids_from_scan_req = 0;
904 return 1;
905 }
906
907
wpa_supplicant_scan(void * eloop_ctx,void * timeout_ctx)908 static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
909 {
910 struct wpa_supplicant *wpa_s = eloop_ctx;
911 struct wpa_ssid *ssid;
912 int ret, p2p_in_prog;
913 struct wpabuf *extra_ie = NULL;
914 struct wpa_driver_scan_params params;
915 struct wpa_driver_scan_params *scan_params;
916 size_t max_ssids;
917 int connect_without_scan = 0;
918
919 wpa_s->ignore_post_flush_scan_res = 0;
920
921 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
922 wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled");
923 return;
924 }
925
926 if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) {
927 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan");
928 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
929 return;
930 }
931
932 if (wpa_s->scanning) {
933 /*
934 * If we are already in scanning state, we shall reschedule the
935 * the incoming scan request.
936 */
937 wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req");
938 wpa_supplicant_req_scan(wpa_s, 1, 0);
939 return;
940 }
941
942 if (!wpa_supplicant_enabled_networks(wpa_s) &&
943 wpa_s->scan_req == NORMAL_SCAN_REQ) {
944 wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan");
945 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
946 return;
947 }
948
949 if (wpa_s->conf->ap_scan != 0 &&
950 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) {
951 wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - "
952 "overriding ap_scan configuration");
953 wpa_s->conf->ap_scan = 0;
954 wpas_notify_ap_scan_changed(wpa_s);
955 }
956
957 if (wpa_s->conf->ap_scan == 0) {
958 wpa_supplicant_gen_assoc_event(wpa_s);
959 return;
960 }
961
962 ssid = NULL;
963 if (wpa_s->scan_req != MANUAL_SCAN_REQ &&
964 wpa_s->connect_without_scan) {
965 connect_without_scan = 1;
966 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
967 if (ssid == wpa_s->connect_without_scan)
968 break;
969 }
970 }
971
972 p2p_in_prog = wpas_p2p_in_progress(wpa_s);
973 if (p2p_in_prog && p2p_in_prog != 2 &&
974 (!ssid ||
975 (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) {
976 wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress");
977 wpa_supplicant_req_scan(wpa_s, 5, 0);
978 return;
979 }
980
981 /*
982 * Don't cancel the scan based on ongoing PNO; defer it. Some scans are
983 * used for changing modes inside wpa_supplicant (roaming,
984 * auto-reconnect, etc). Discarding the scan might hurt these processes.
985 * The normal use case for PNO is to suspend the host immediately after
986 * starting PNO, so the periodic 100 ms attempts to run the scan do not
987 * normally happen in practice multiple times, i.e., this is simply
988 * restarting scanning once the host is woken up and PNO stopped.
989 */
990 if (wpa_s->pno || wpa_s->pno_sched_pending) {
991 wpa_dbg(wpa_s, MSG_DEBUG, "Defer scan - PNO is in progress");
992 wpa_supplicant_req_scan(wpa_s, 0, 100000);
993 return;
994 }
995
996 if (wpa_s->conf->ap_scan == 2)
997 max_ssids = 1;
998 else {
999 max_ssids = wpa_s->max_scan_ssids;
1000 if (max_ssids > WPAS_MAX_SCAN_SSIDS)
1001 max_ssids = WPAS_MAX_SCAN_SSIDS;
1002 }
1003
1004 wpa_s->last_scan_req = wpa_s->scan_req;
1005 wpa_s->scan_req = NORMAL_SCAN_REQ;
1006
1007 if (connect_without_scan) {
1008 wpa_s->connect_without_scan = NULL;
1009 if (ssid) {
1010 wpa_printf(MSG_DEBUG, "Start a pre-selected network "
1011 "without scan step");
1012 wpa_supplicant_associate(wpa_s, NULL, ssid);
1013 return;
1014 }
1015 }
1016
1017 os_memset(¶ms, 0, sizeof(params));
1018
1019 wpa_s->scan_prev_wpa_state = wpa_s->wpa_state;
1020 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1021 wpa_s->wpa_state == WPA_INACTIVE)
1022 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1023
1024 /*
1025 * If autoscan has set its own scanning parameters
1026 */
1027 if (wpa_s->autoscan_params != NULL) {
1028 scan_params = wpa_s->autoscan_params;
1029 goto scan;
1030 }
1031
1032 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1033 wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) {
1034 wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command");
1035 goto ssid_list_set;
1036 }
1037
1038 #ifdef CONFIG_P2P
1039 if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) &&
1040 wpa_s->go_params && !wpa_s->conf->passive_scan) {
1041 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)",
1042 wpa_s->p2p_in_provisioning,
1043 wpa_s->show_group_started);
1044 params.ssids[0].ssid = wpa_s->go_params->ssid;
1045 params.ssids[0].ssid_len = wpa_s->go_params->ssid_len;
1046 params.num_ssids = 1;
1047 goto ssid_list_set;
1048 }
1049
1050 if (wpa_s->p2p_in_invitation) {
1051 if (wpa_s->current_ssid) {
1052 wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation");
1053 params.ssids[0].ssid = wpa_s->current_ssid->ssid;
1054 params.ssids[0].ssid_len =
1055 wpa_s->current_ssid->ssid_len;
1056 params.num_ssids = 1;
1057 } else {
1058 wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation");
1059 }
1060 goto ssid_list_set;
1061 }
1062 #endif /* CONFIG_P2P */
1063
1064 /* Find the starting point from which to continue scanning */
1065 ssid = wpa_s->conf->ssid;
1066 if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) {
1067 while (ssid) {
1068 if (ssid == wpa_s->prev_scan_ssid) {
1069 ssid = ssid->next;
1070 break;
1071 }
1072 ssid = ssid->next;
1073 }
1074 }
1075
1076 if (wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
1077 #ifdef CONFIG_AP
1078 !wpa_s->ap_iface &&
1079 #endif /* CONFIG_AP */
1080 wpa_s->conf->ap_scan == 2) {
1081 wpa_s->connect_without_scan = NULL;
1082 wpa_s->prev_scan_wildcard = 0;
1083 wpa_supplicant_assoc_try(wpa_s, ssid);
1084 return;
1085 } else if (wpa_s->conf->ap_scan == 2) {
1086 /*
1087 * User-initiated scan request in ap_scan == 2; scan with
1088 * wildcard SSID.
1089 */
1090 ssid = NULL;
1091 } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) {
1092 /*
1093 * Perform single-channel single-SSID scan for
1094 * reassociate-to-same-BSS operation.
1095 */
1096 /* Setup SSID */
1097 ssid = wpa_s->current_ssid;
1098 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1099 ssid->ssid, ssid->ssid_len);
1100 params.ssids[0].ssid = ssid->ssid;
1101 params.ssids[0].ssid_len = ssid->ssid_len;
1102 params.num_ssids = 1;
1103
1104 /*
1105 * Allocate memory for frequency array, allocate one extra
1106 * slot for the zero-terminator.
1107 */
1108 params.freqs = os_malloc(sizeof(int) * 2);
1109 if (params.freqs) {
1110 params.freqs[0] = wpa_s->assoc_freq;
1111 params.freqs[1] = 0;
1112 }
1113
1114 /*
1115 * Reset the reattach flag so that we fall back to full scan if
1116 * this scan fails.
1117 */
1118 wpa_s->reattach = 0;
1119 } else {
1120 struct wpa_ssid *start = ssid, *tssid;
1121 int freqs_set = 0;
1122 if (ssid == NULL && max_ssids > 1)
1123 ssid = wpa_s->conf->ssid;
1124 while (ssid) {
1125 if (!wpas_network_disabled(wpa_s, ssid) &&
1126 ssid->scan_ssid) {
1127 wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID",
1128 ssid->ssid, ssid->ssid_len);
1129 params.ssids[params.num_ssids].ssid =
1130 ssid->ssid;
1131 params.ssids[params.num_ssids].ssid_len =
1132 ssid->ssid_len;
1133 params.num_ssids++;
1134 if (params.num_ssids + 1 >= max_ssids)
1135 break;
1136 }
1137
1138 if (!wpas_network_disabled(wpa_s, ssid)) {
1139 /*
1140 * Also add the SSID of the OWE BSS, to allow
1141 * discovery of transition mode APs more
1142 * quickly.
1143 */
1144 wpa_add_owe_scan_ssid(wpa_s, ¶ms, ssid,
1145 max_ssids);
1146 }
1147
1148 ssid = ssid->next;
1149 if (ssid == start)
1150 break;
1151 if (ssid == NULL && max_ssids > 1 &&
1152 start != wpa_s->conf->ssid)
1153 ssid = wpa_s->conf->ssid;
1154 }
1155
1156 if (wpa_s->scan_id_count &&
1157 wpa_s->last_scan_req == MANUAL_SCAN_REQ)
1158 wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids);
1159
1160 for (tssid = wpa_s->conf->ssid;
1161 wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid;
1162 tssid = tssid->next) {
1163 if (wpas_network_disabled(wpa_s, tssid))
1164 continue;
1165 if (((params.freqs || !freqs_set) &&
1166 tssid->scan_freq) &&
1167 int_array_len(params.freqs) < 100) {
1168 int_array_concat(¶ms.freqs,
1169 tssid->scan_freq);
1170 } else {
1171 os_free(params.freqs);
1172 params.freqs = NULL;
1173 }
1174 freqs_set = 1;
1175 }
1176 int_array_sort_unique(params.freqs);
1177 }
1178
1179 if (ssid && max_ssids == 1) {
1180 /*
1181 * If the driver is limited to 1 SSID at a time interleave
1182 * wildcard SSID scans with specific SSID scans to avoid
1183 * waiting a long time for a wildcard scan.
1184 */
1185 if (!wpa_s->prev_scan_wildcard) {
1186 params.ssids[0].ssid = NULL;
1187 params.ssids[0].ssid_len = 0;
1188 wpa_s->prev_scan_wildcard = 1;
1189 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for "
1190 "wildcard SSID (Interleave with specific)");
1191 } else {
1192 wpa_s->prev_scan_ssid = ssid;
1193 wpa_s->prev_scan_wildcard = 0;
1194 wpa_dbg(wpa_s, MSG_DEBUG,
1195 "Starting AP scan for specific SSID: %s",
1196 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1197 }
1198 } else if (ssid) {
1199 /* max_ssids > 1 */
1200
1201 wpa_s->prev_scan_ssid = ssid;
1202 wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
1203 "the scan request");
1204 params.num_ssids++;
1205 } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1206 wpa_s->manual_scan_passive && params.num_ssids == 0) {
1207 wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
1208 } else if (wpa_s->conf->passive_scan) {
1209 wpa_dbg(wpa_s, MSG_DEBUG,
1210 "Use passive scan based on configuration");
1211 } else {
1212 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1213 params.num_ssids++;
1214 wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard "
1215 "SSID");
1216 }
1217
1218 ssid_list_set:
1219 wpa_supplicant_optimize_freqs(wpa_s, ¶ms);
1220 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1221
1222 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1223 wpa_s->manual_scan_only_new) {
1224 wpa_printf(MSG_DEBUG,
1225 "Request driver to clear scan cache due to manual only_new=1 scan");
1226 params.only_new_results = 1;
1227 }
1228
1229 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL &&
1230 wpa_s->manual_scan_freqs) {
1231 wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels");
1232 params.freqs = wpa_s->manual_scan_freqs;
1233 wpa_s->manual_scan_freqs = NULL;
1234 }
1235
1236 if (params.freqs == NULL && wpa_s->select_network_scan_freqs) {
1237 wpa_dbg(wpa_s, MSG_DEBUG,
1238 "Limit select_network scan to specified channels");
1239 params.freqs = wpa_s->select_network_scan_freqs;
1240 wpa_s->select_network_scan_freqs = NULL;
1241 }
1242
1243 if (params.freqs == NULL && wpa_s->next_scan_freqs) {
1244 wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously "
1245 "generated frequency list");
1246 params.freqs = wpa_s->next_scan_freqs;
1247 } else
1248 os_free(wpa_s->next_scan_freqs);
1249 wpa_s->next_scan_freqs = NULL;
1250 wpa_setband_scan_freqs(wpa_s, ¶ms);
1251
1252 /* See if user specified frequencies. If so, scan only those. */
1253 if (wpa_s->last_scan_req == INITIAL_SCAN_REQ &&
1254 wpa_s->conf->initial_freq_list && !params.freqs) {
1255 wpa_dbg(wpa_s, MSG_DEBUG,
1256 "Optimize scan based on conf->initial_freq_list");
1257 int_array_concat(¶ms.freqs, wpa_s->conf->initial_freq_list);
1258 } else if (wpa_s->conf->freq_list && !params.freqs) {
1259 wpa_dbg(wpa_s, MSG_DEBUG,
1260 "Optimize scan based on conf->freq_list");
1261 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
1262 }
1263
1264 /* Use current associated channel? */
1265 if (wpa_s->conf->scan_cur_freq && !params.freqs) {
1266 unsigned int num = wpa_s->num_multichan_concurrent;
1267
1268 params.freqs = os_calloc(num + 1, sizeof(int));
1269 if (params.freqs) {
1270 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1271 if (num > 0) {
1272 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the "
1273 "current operating channels since "
1274 "scan_cur_freq is enabled");
1275 } else {
1276 os_free(params.freqs);
1277 params.freqs = NULL;
1278 }
1279 }
1280 }
1281
1282 #ifdef CONFIG_MBO
1283 if (wpa_s->enable_oce & OCE_STA)
1284 params.oce_scan = 1;
1285 #endif /* CONFIG_MBO */
1286
1287 params.filter_ssids = wpa_supplicant_build_filter_ssids(
1288 wpa_s->conf, ¶ms.num_filter_ssids);
1289 if (extra_ie) {
1290 params.extra_ies = wpabuf_head(extra_ie);
1291 params.extra_ies_len = wpabuf_len(extra_ie);
1292 }
1293
1294 #ifdef CONFIG_P2P
1295 if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation ||
1296 (wpa_s->show_group_started && wpa_s->go_params)) {
1297 /*
1298 * The interface may not yet be in P2P mode, so we have to
1299 * explicitly request P2P probe to disable CCK rates.
1300 */
1301 params.p2p_probe = 1;
1302 }
1303 #endif /* CONFIG_P2P */
1304
1305 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) &&
1306 wpa_s->wpa_state <= WPA_SCANNING)
1307 wpa_setup_mac_addr_rand_params(¶ms, wpa_s->mac_addr_scan);
1308
1309 if (!is_zero_ether_addr(wpa_s->next_scan_bssid)) {
1310 struct wpa_bss *bss;
1311
1312 params.bssid = wpa_s->next_scan_bssid;
1313 bss = wpa_bss_get_bssid_latest(wpa_s, params.bssid);
1314 if (!wpa_s->next_scan_bssid_wildcard_ssid &&
1315 bss && bss->ssid_len && params.num_ssids == 1 &&
1316 params.ssids[0].ssid_len == 0) {
1317 params.ssids[0].ssid = bss->ssid;
1318 params.ssids[0].ssid_len = bss->ssid_len;
1319 wpa_dbg(wpa_s, MSG_DEBUG,
1320 "Scan a previously specified BSSID " MACSTR
1321 " and SSID %s",
1322 MAC2STR(params.bssid),
1323 wpa_ssid_txt(bss->ssid, bss->ssid_len));
1324 } else {
1325 wpa_dbg(wpa_s, MSG_DEBUG,
1326 "Scan a previously specified BSSID " MACSTR,
1327 MAC2STR(params.bssid));
1328 }
1329 }
1330
1331 scan_params = ¶ms;
1332
1333 scan:
1334 #ifdef CONFIG_P2P
1335 /*
1336 * If the driver does not support multi-channel concurrency and a
1337 * virtual interface that shares the same radio with the wpa_s interface
1338 * is operating there may not be need to scan other channels apart from
1339 * the current operating channel on the other virtual interface. Filter
1340 * out other channels in case we are trying to find a connection for a
1341 * station interface when we are not configured to prefer station
1342 * connection and a concurrent operation is already in process.
1343 */
1344 if (wpa_s->scan_for_connection &&
1345 wpa_s->last_scan_req == NORMAL_SCAN_REQ &&
1346 !scan_params->freqs && !params.freqs &&
1347 wpas_is_p2p_prioritized(wpa_s) &&
1348 wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
1349 non_p2p_network_enabled(wpa_s)) {
1350 unsigned int num = wpa_s->num_multichan_concurrent;
1351
1352 params.freqs = os_calloc(num + 1, sizeof(int));
1353 if (params.freqs) {
1354 num = get_shared_radio_freqs(wpa_s, params.freqs, num);
1355 if (num > 0 && num == wpa_s->num_multichan_concurrent) {
1356 wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used");
1357 } else {
1358 os_free(params.freqs);
1359 params.freqs = NULL;
1360 }
1361 }
1362 }
1363
1364 if (!params.freqs &&
1365 (wpa_s->p2p_in_invitation || wpa_s->p2p_in_provisioning) &&
1366 !is_p2p_allow_6ghz(wpa_s->global->p2p) &&
1367 is_6ghz_supported(wpa_s)) {
1368 int i;
1369
1370 /* Exclude 5 GHz channels from the full scan for P2P connection
1371 * since the 6 GHz band is disabled for P2P uses. */
1372 wpa_printf(MSG_DEBUG,
1373 "P2P: 6 GHz disabled - update the scan frequency list");
1374 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1375 if (wpa_s->hw.modes[i].num_channels == 0)
1376 continue;
1377 if (wpa_s->hw.modes[i].mode == HOSTAPD_MODE_IEEE80211G)
1378 wpa_add_scan_freqs_list(
1379 wpa_s, HOSTAPD_MODE_IEEE80211G,
1380 ¶ms, false);
1381 if (wpa_s->hw.modes[i].mode == HOSTAPD_MODE_IEEE80211A)
1382 wpa_add_scan_freqs_list(
1383 wpa_s, HOSTAPD_MODE_IEEE80211A,
1384 ¶ms, false);
1385 if (wpa_s->hw.modes[i].mode == HOSTAPD_MODE_IEEE80211AD)
1386 wpa_add_scan_freqs_list(
1387 wpa_s, HOSTAPD_MODE_IEEE80211AD,
1388 ¶ms, false);
1389 }
1390 }
1391 #endif /* CONFIG_P2P */
1392
1393 ret = wpa_supplicant_trigger_scan(wpa_s, scan_params);
1394
1395 if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs &&
1396 !wpa_s->manual_scan_freqs) {
1397 /* Restore manual_scan_freqs for the next attempt */
1398 wpa_s->manual_scan_freqs = params.freqs;
1399 params.freqs = NULL;
1400 }
1401
1402 wpabuf_free(extra_ie);
1403 os_free(params.freqs);
1404 os_free(params.filter_ssids);
1405 os_free(params.mac_addr);
1406
1407 if (ret) {
1408 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan");
1409 if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state)
1410 wpa_supplicant_set_state(wpa_s,
1411 wpa_s->scan_prev_wpa_state);
1412 /* Restore scan_req since we will try to scan again */
1413 wpa_s->scan_req = wpa_s->last_scan_req;
1414 wpa_supplicant_req_scan(wpa_s, 1, 0);
1415 } else {
1416 wpa_s->scan_for_connection = 0;
1417 #ifdef CONFIG_INTERWORKING
1418 wpa_s->interworking_fast_assoc_tried = 0;
1419 #endif /* CONFIG_INTERWORKING */
1420 wpa_s->next_scan_bssid_wildcard_ssid = 0;
1421 if (params.bssid)
1422 os_memset(wpa_s->next_scan_bssid, 0, ETH_ALEN);
1423 }
1424 }
1425
1426
wpa_supplicant_update_scan_int(struct wpa_supplicant * wpa_s,int sec)1427 void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
1428 {
1429 struct os_reltime remaining, new_int;
1430 int cancelled;
1431
1432 cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL,
1433 &remaining);
1434
1435 new_int.sec = sec;
1436 new_int.usec = 0;
1437 if (cancelled && os_reltime_before(&remaining, &new_int)) {
1438 new_int.sec = remaining.sec;
1439 new_int.usec = remaining.usec;
1440 }
1441
1442 if (cancelled) {
1443 eloop_register_timeout(new_int.sec, new_int.usec,
1444 wpa_supplicant_scan, wpa_s, NULL);
1445 }
1446 wpa_s->scan_interval = sec;
1447 }
1448
1449
1450 /**
1451 * wpa_supplicant_req_scan - Schedule a scan for neighboring access points
1452 * @wpa_s: Pointer to wpa_supplicant data
1453 * @sec: Number of seconds after which to scan
1454 * @usec: Number of microseconds after which to scan
1455 *
1456 * This function is used to schedule a scan for neighboring access points after
1457 * the specified time.
1458 */
wpa_supplicant_req_scan(struct wpa_supplicant * wpa_s,int sec,int usec)1459 void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
1460 {
1461 int res;
1462
1463 if (wpa_s->p2p_mgmt) {
1464 wpa_dbg(wpa_s, MSG_DEBUG,
1465 "Ignore scan request (%d.%06d sec) on p2p_mgmt interface",
1466 sec, usec);
1467 return;
1468 }
1469
1470 res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s,
1471 NULL);
1472 if (res == 1) {
1473 wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec",
1474 sec, usec);
1475 } else if (res == 0) {
1476 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner",
1477 sec, usec);
1478 } else {
1479 wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec",
1480 sec, usec);
1481 eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL);
1482 }
1483 }
1484
1485
1486 /**
1487 * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan
1488 * @wpa_s: Pointer to wpa_supplicant data
1489 * @sec: Number of seconds after which to scan
1490 * @usec: Number of microseconds after which to scan
1491 * Returns: 0 on success or -1 otherwise
1492 *
1493 * This function is used to schedule periodic scans for neighboring
1494 * access points after the specified time.
1495 */
wpa_supplicant_delayed_sched_scan(struct wpa_supplicant * wpa_s,int sec,int usec)1496 int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s,
1497 int sec, int usec)
1498 {
1499 if (!wpa_s->sched_scan_supported)
1500 return -1;
1501
1502 eloop_register_timeout(sec, usec,
1503 wpa_supplicant_delayed_sched_scan_timeout,
1504 wpa_s, NULL);
1505
1506 return 0;
1507 }
1508
1509
1510 static void
wpa_scan_set_relative_rssi_params(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)1511 wpa_scan_set_relative_rssi_params(struct wpa_supplicant *wpa_s,
1512 struct wpa_driver_scan_params *params)
1513 {
1514 if (wpa_s->wpa_state != WPA_COMPLETED ||
1515 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI) ||
1516 wpa_s->srp.relative_rssi_set == 0)
1517 return;
1518
1519 params->relative_rssi_set = 1;
1520 params->relative_rssi = wpa_s->srp.relative_rssi;
1521
1522 if (wpa_s->srp.relative_adjust_rssi == 0)
1523 return;
1524
1525 params->relative_adjust_band = wpa_s->srp.relative_adjust_band;
1526 params->relative_adjust_rssi = wpa_s->srp.relative_adjust_rssi;
1527 }
1528
1529
1530 /**
1531 * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan
1532 * @wpa_s: Pointer to wpa_supplicant data
1533 * Returns: 0 is sched_scan was started or -1 otherwise
1534 *
1535 * This function is used to schedule periodic scans for neighboring
1536 * access points repeating the scan continuously.
1537 */
wpa_supplicant_req_sched_scan(struct wpa_supplicant * wpa_s)1538 int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
1539 {
1540 struct wpa_driver_scan_params params;
1541 struct wpa_driver_scan_params *scan_params;
1542 enum wpa_states prev_state;
1543 struct wpa_ssid *ssid = NULL;
1544 struct wpabuf *extra_ie = NULL;
1545 int ret;
1546 unsigned int max_sched_scan_ssids;
1547 int wildcard = 0;
1548 int need_ssids;
1549 struct sched_scan_plan scan_plan;
1550
1551 if (!wpa_s->sched_scan_supported)
1552 return -1;
1553
1554 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
1555 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
1556 else
1557 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
1558 if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload)
1559 return -1;
1560
1561 wpa_s->sched_scan_stop_req = 0;
1562
1563 if (wpa_s->sched_scanning) {
1564 wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning");
1565 return 0;
1566 }
1567
1568 need_ssids = 0;
1569 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1570 if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) {
1571 /* Use wildcard SSID to find this network */
1572 wildcard = 1;
1573 } else if (!wpas_network_disabled(wpa_s, ssid) &&
1574 ssid->ssid_len)
1575 need_ssids++;
1576
1577 #ifdef CONFIG_WPS
1578 if (!wpas_network_disabled(wpa_s, ssid) &&
1579 ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1580 /*
1581 * Normal scan is more reliable and faster for WPS
1582 * operations and since these are for short periods of
1583 * time, the benefit of trying to use sched_scan would
1584 * be limited.
1585 */
1586 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1587 "sched_scan for WPS");
1588 return -1;
1589 }
1590 #endif /* CONFIG_WPS */
1591 }
1592 if (wildcard)
1593 need_ssids++;
1594
1595 if (wpa_s->normal_scans < 3 &&
1596 (need_ssids <= wpa_s->max_scan_ssids ||
1597 wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) {
1598 /*
1599 * When normal scan can speed up operations, use that for the
1600 * first operations before starting the sched_scan to allow
1601 * user space sleep more. We do this only if the normal scan
1602 * has functionality that is suitable for this or if the
1603 * sched_scan does not have better support for multiple SSIDs.
1604 */
1605 wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of "
1606 "sched_scan for initial scans (normal_scans=%d)",
1607 wpa_s->normal_scans);
1608 return -1;
1609 }
1610
1611 os_memset(¶ms, 0, sizeof(params));
1612
1613 /* If we can't allocate space for the filters, we just don't filter */
1614 params.filter_ssids = os_calloc(wpa_s->max_match_sets,
1615 sizeof(struct wpa_driver_scan_filter));
1616
1617 prev_state = wpa_s->wpa_state;
1618 if (wpa_s->wpa_state == WPA_DISCONNECTED ||
1619 wpa_s->wpa_state == WPA_INACTIVE)
1620 wpa_supplicant_set_state(wpa_s, WPA_SCANNING);
1621
1622 if (wpa_s->autoscan_params != NULL) {
1623 scan_params = wpa_s->autoscan_params;
1624 goto scan;
1625 }
1626
1627 /* Find the starting point from which to continue scanning */
1628 ssid = wpa_s->conf->ssid;
1629 if (wpa_s->prev_sched_ssid) {
1630 while (ssid) {
1631 if (ssid == wpa_s->prev_sched_ssid) {
1632 ssid = ssid->next;
1633 break;
1634 }
1635 ssid = ssid->next;
1636 }
1637 }
1638
1639 if (!ssid || !wpa_s->prev_sched_ssid) {
1640 wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
1641 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1642 wpa_s->first_sched_scan = 1;
1643 ssid = wpa_s->conf->ssid;
1644 wpa_s->prev_sched_ssid = ssid;
1645 }
1646
1647 if (wildcard) {
1648 wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan");
1649 params.num_ssids++;
1650 }
1651
1652 while (ssid) {
1653 if (wpas_network_disabled(wpa_s, ssid))
1654 goto next;
1655
1656 if (params.num_filter_ssids < wpa_s->max_match_sets &&
1657 params.filter_ssids && ssid->ssid && ssid->ssid_len) {
1658 wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s",
1659 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1660 os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid,
1661 ssid->ssid, ssid->ssid_len);
1662 params.filter_ssids[params.num_filter_ssids].ssid_len =
1663 ssid->ssid_len;
1664 params.num_filter_ssids++;
1665 } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len)
1666 {
1667 wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID "
1668 "filter for sched_scan - drop filter");
1669 os_free(params.filter_ssids);
1670 params.filter_ssids = NULL;
1671 params.num_filter_ssids = 0;
1672 }
1673
1674 if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) {
1675 if (params.num_ssids == max_sched_scan_ssids)
1676 break; /* only room for broadcast SSID */
1677 wpa_dbg(wpa_s, MSG_DEBUG,
1678 "add to active scan ssid: %s",
1679 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1680 params.ssids[params.num_ssids].ssid =
1681 ssid->ssid;
1682 params.ssids[params.num_ssids].ssid_len =
1683 ssid->ssid_len;
1684 params.num_ssids++;
1685 if (params.num_ssids >= max_sched_scan_ssids) {
1686 wpa_s->prev_sched_ssid = ssid;
1687 do {
1688 ssid = ssid->next;
1689 } while (ssid &&
1690 (wpas_network_disabled(wpa_s, ssid) ||
1691 !ssid->scan_ssid));
1692 break;
1693 }
1694 }
1695
1696 next:
1697 wpa_s->prev_sched_ssid = ssid;
1698 ssid = ssid->next;
1699 }
1700
1701 if (params.num_filter_ssids == 0) {
1702 os_free(params.filter_ssids);
1703 params.filter_ssids = NULL;
1704 }
1705
1706 extra_ie = wpa_supplicant_extra_ies(wpa_s);
1707 if (extra_ie) {
1708 params.extra_ies = wpabuf_head(extra_ie);
1709 params.extra_ies_len = wpabuf_len(extra_ie);
1710 }
1711
1712 if (wpa_s->conf->filter_rssi)
1713 params.filter_rssi = wpa_s->conf->filter_rssi;
1714
1715 /* See if user specified frequencies. If so, scan only those. */
1716 if (wpa_s->conf->freq_list && !params.freqs) {
1717 wpa_dbg(wpa_s, MSG_DEBUG,
1718 "Optimize scan based on conf->freq_list");
1719 int_array_concat(¶ms.freqs, wpa_s->conf->freq_list);
1720 }
1721
1722 #ifdef CONFIG_MBO
1723 if (wpa_s->enable_oce & OCE_STA)
1724 params.oce_scan = 1;
1725 #endif /* CONFIG_MBO */
1726
1727 scan_params = ¶ms;
1728
1729 scan:
1730 wpa_s->sched_scan_timed_out = 0;
1731
1732 /*
1733 * We cannot support multiple scan plans if the scan request includes
1734 * too many SSID's, so in this case use only the last scan plan and make
1735 * it run infinitely. It will be stopped by the timeout.
1736 */
1737 if (wpa_s->sched_scan_plans_num == 1 ||
1738 (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) {
1739 params.sched_scan_plans = wpa_s->sched_scan_plans;
1740 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
1741 } else if (wpa_s->sched_scan_plans_num > 1) {
1742 wpa_dbg(wpa_s, MSG_DEBUG,
1743 "Too many SSIDs. Default to using single scheduled_scan plan");
1744 params.sched_scan_plans =
1745 &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num -
1746 1];
1747 params.sched_scan_plans_num = 1;
1748 } else {
1749 if (wpa_s->conf->sched_scan_interval)
1750 scan_plan.interval = wpa_s->conf->sched_scan_interval;
1751 else
1752 scan_plan.interval = 10;
1753
1754 if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) {
1755 wpa_printf(MSG_WARNING,
1756 "Scan interval too long(%u), use the maximum allowed(%u)",
1757 scan_plan.interval,
1758 wpa_s->max_sched_scan_plan_interval);
1759 scan_plan.interval =
1760 wpa_s->max_sched_scan_plan_interval;
1761 }
1762
1763 scan_plan.iterations = 0;
1764 params.sched_scan_plans = &scan_plan;
1765 params.sched_scan_plans_num = 1;
1766 }
1767
1768 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
1769
1770 if (ssid || !wpa_s->first_sched_scan) {
1771 wpa_dbg(wpa_s, MSG_DEBUG,
1772 "Starting sched scan after %u seconds: interval %u timeout %d",
1773 params.sched_scan_start_delay,
1774 params.sched_scan_plans[0].interval,
1775 wpa_s->sched_scan_timeout);
1776 } else {
1777 wpa_dbg(wpa_s, MSG_DEBUG,
1778 "Starting sched scan after %u seconds (no timeout)",
1779 params.sched_scan_start_delay);
1780 }
1781
1782 wpa_setband_scan_freqs(wpa_s, scan_params);
1783
1784 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) &&
1785 wpa_s->wpa_state <= WPA_SCANNING)
1786 wpa_setup_mac_addr_rand_params(¶ms,
1787 wpa_s->mac_addr_sched_scan);
1788
1789 wpa_scan_set_relative_rssi_params(wpa_s, scan_params);
1790
1791 ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params);
1792 wpabuf_free(extra_ie);
1793 os_free(params.filter_ssids);
1794 os_free(params.mac_addr);
1795 if (ret) {
1796 wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan");
1797 if (prev_state != wpa_s->wpa_state)
1798 wpa_supplicant_set_state(wpa_s, prev_state);
1799 return ret;
1800 }
1801
1802 /* If we have more SSIDs to scan, add a timeout so we scan them too */
1803 if (ssid || !wpa_s->first_sched_scan) {
1804 wpa_s->sched_scan_timed_out = 0;
1805 eloop_register_timeout(wpa_s->sched_scan_timeout, 0,
1806 wpa_supplicant_sched_scan_timeout,
1807 wpa_s, NULL);
1808 wpa_s->first_sched_scan = 0;
1809 wpa_s->sched_scan_timeout /= 2;
1810 params.sched_scan_plans[0].interval *= 2;
1811 if ((unsigned int) wpa_s->sched_scan_timeout <
1812 params.sched_scan_plans[0].interval ||
1813 params.sched_scan_plans[0].interval >
1814 wpa_s->max_sched_scan_plan_interval) {
1815 params.sched_scan_plans[0].interval = 10;
1816 wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;
1817 }
1818 }
1819
1820 /* If there is no more ssids, start next time from the beginning */
1821 if (!ssid)
1822 wpa_s->prev_sched_ssid = NULL;
1823
1824 return 0;
1825 }
1826
1827
1828 /**
1829 * wpa_supplicant_cancel_scan - Cancel a scheduled scan request
1830 * @wpa_s: Pointer to wpa_supplicant data
1831 *
1832 * This function is used to cancel a scan request scheduled with
1833 * wpa_supplicant_req_scan().
1834 */
wpa_supplicant_cancel_scan(struct wpa_supplicant * wpa_s)1835 void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s)
1836 {
1837 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request");
1838 eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL);
1839 }
1840
1841
1842 /**
1843 * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan
1844 * @wpa_s: Pointer to wpa_supplicant data
1845 *
1846 * This function is used to stop a delayed scheduled scan.
1847 */
wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant * wpa_s)1848 void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s)
1849 {
1850 if (!wpa_s->sched_scan_supported)
1851 return;
1852
1853 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan");
1854 eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout,
1855 wpa_s, NULL);
1856 }
1857
1858
1859 /**
1860 * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans
1861 * @wpa_s: Pointer to wpa_supplicant data
1862 *
1863 * This function is used to stop a periodic scheduled scan.
1864 */
wpa_supplicant_cancel_sched_scan(struct wpa_supplicant * wpa_s)1865 void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s)
1866 {
1867 if (!wpa_s->sched_scanning)
1868 return;
1869
1870 if (wpa_s->sched_scanning)
1871 wpa_s->sched_scan_stop_req = 1;
1872
1873 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan");
1874 eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL);
1875 wpa_supplicant_stop_sched_scan(wpa_s);
1876 }
1877
1878
1879 /**
1880 * wpa_supplicant_notify_scanning - Indicate possible scan state change
1881 * @wpa_s: Pointer to wpa_supplicant data
1882 * @scanning: Whether scanning is currently in progress
1883 *
1884 * This function is to generate scanning notifycations. It is called whenever
1885 * there may have been a change in scanning (scan started, completed, stopped).
1886 * wpas_notify_scanning() is called whenever the scanning state changed from the
1887 * previously notified state.
1888 */
wpa_supplicant_notify_scanning(struct wpa_supplicant * wpa_s,int scanning)1889 void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s,
1890 int scanning)
1891 {
1892 if (wpa_s->scanning != scanning) {
1893 wpa_s->scanning = scanning;
1894 wpas_notify_scanning(wpa_s);
1895 }
1896 }
1897
1898
wpa_scan_get_max_rate(const struct wpa_scan_res * res)1899 static int wpa_scan_get_max_rate(const struct wpa_scan_res *res)
1900 {
1901 int rate = 0;
1902 const u8 *ie;
1903 int i;
1904
1905 ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES);
1906 for (i = 0; ie && i < ie[1]; i++) {
1907 if ((ie[i + 2] & 0x7f) > rate)
1908 rate = ie[i + 2] & 0x7f;
1909 }
1910
1911 ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES);
1912 for (i = 0; ie && i < ie[1]; i++) {
1913 if ((ie[i + 2] & 0x7f) > rate)
1914 rate = ie[i + 2] & 0x7f;
1915 }
1916
1917 return rate;
1918 }
1919
1920
1921 /**
1922 * wpa_scan_get_ie - Fetch a specified information element from a scan result
1923 * @res: Scan result entry
1924 * @ie: Information element identitifier (WLAN_EID_*)
1925 * Returns: Pointer to the information element (id field) or %NULL if not found
1926 *
1927 * This function returns the first matching information element in the scan
1928 * result.
1929 */
wpa_scan_get_ie(const struct wpa_scan_res * res,u8 ie)1930 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie)
1931 {
1932 size_t ie_len = res->ie_len;
1933
1934 /* Use the Beacon frame IEs if res->ie_len is not available */
1935 if (!ie_len)
1936 ie_len = res->beacon_ie_len;
1937
1938 return get_ie((const u8 *) (res + 1), ie_len, ie);
1939 }
1940
1941
1942 /**
1943 * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result
1944 * @res: Scan result entry
1945 * @vendor_type: Vendor type (four octets starting the IE payload)
1946 * Returns: Pointer to the information element (id field) or %NULL if not found
1947 *
1948 * This function returns the first matching information element in the scan
1949 * result.
1950 */
wpa_scan_get_vendor_ie(const struct wpa_scan_res * res,u32 vendor_type)1951 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1952 u32 vendor_type)
1953 {
1954 const u8 *ies;
1955 const struct element *elem;
1956
1957 ies = (const u8 *) (res + 1);
1958
1959 for_each_element_id(elem, WLAN_EID_VENDOR_SPECIFIC, ies, res->ie_len) {
1960 if (elem->datalen >= 4 &&
1961 vendor_type == WPA_GET_BE32(elem->data))
1962 return &elem->id;
1963 }
1964
1965 return NULL;
1966 }
1967
1968
1969 /**
1970 * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result
1971 * @res: Scan result entry
1972 * @vendor_type: Vendor type (four octets starting the IE payload)
1973 * Returns: Pointer to the information element (id field) or %NULL if not found
1974 *
1975 * This function returns the first matching information element in the scan
1976 * result.
1977 *
1978 * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only
1979 * from Beacon frames instead of either Beacon or Probe Response frames.
1980 */
wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res * res,u32 vendor_type)1981 const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res,
1982 u32 vendor_type)
1983 {
1984 const u8 *ies;
1985 const struct element *elem;
1986
1987 if (res->beacon_ie_len == 0)
1988 return NULL;
1989
1990 ies = (const u8 *) (res + 1);
1991 ies += res->ie_len;
1992
1993 for_each_element_id(elem, WLAN_EID_VENDOR_SPECIFIC, ies,
1994 res->beacon_ie_len) {
1995 if (elem->datalen >= 4 &&
1996 vendor_type == WPA_GET_BE32(elem->data))
1997 return &elem->id;
1998 }
1999
2000 return NULL;
2001 }
2002
2003
2004 /**
2005 * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result
2006 * @res: Scan result entry
2007 * @vendor_type: Vendor type (four octets starting the IE payload)
2008 * Returns: Pointer to the information element payload or %NULL if not found
2009 *
2010 * This function returns concatenated payload of possibly fragmented vendor
2011 * specific information elements in the scan result. The caller is responsible
2012 * for freeing the returned buffer.
2013 */
wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res * res,u32 vendor_type)2014 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
2015 u32 vendor_type)
2016 {
2017 struct wpabuf *buf;
2018 const u8 *end, *pos;
2019
2020 buf = wpabuf_alloc(res->ie_len);
2021 if (buf == NULL)
2022 return NULL;
2023
2024 pos = (const u8 *) (res + 1);
2025 end = pos + res->ie_len;
2026
2027 while (end - pos > 1) {
2028 u8 ie, len;
2029
2030 ie = pos[0];
2031 len = pos[1];
2032 if (len > end - pos - 2)
2033 break;
2034 pos += 2;
2035 if (ie == WLAN_EID_VENDOR_SPECIFIC && len >= 4 &&
2036 vendor_type == WPA_GET_BE32(pos))
2037 wpabuf_put_data(buf, pos + 4, len - 4);
2038 pos += len;
2039 }
2040
2041 if (wpabuf_len(buf) == 0) {
2042 wpabuf_free(buf);
2043 buf = NULL;
2044 }
2045
2046 return buf;
2047 }
2048
2049
2050 /* Compare function for sorting scan results. Return >0 if @b is considered
2051 * better. */
wpa_scan_result_compar(const void * a,const void * b)2052 static int wpa_scan_result_compar(const void *a, const void *b)
2053 {
2054 #ifndef MIN
2055 #define MIN(a,b) a < b ? a : b
2056 #endif
2057 struct wpa_scan_res **_wa = (void *) a;
2058 struct wpa_scan_res **_wb = (void *) b;
2059 struct wpa_scan_res *wa = *_wa;
2060 struct wpa_scan_res *wb = *_wb;
2061 int wpa_a, wpa_b;
2062 int snr_a, snr_b, snr_a_full, snr_b_full;
2063
2064 /* WPA/WPA2 support preferred */
2065 wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL ||
2066 wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL;
2067 wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL ||
2068 wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL;
2069
2070 if (wpa_b && !wpa_a)
2071 return 1;
2072 if (!wpa_b && wpa_a)
2073 return -1;
2074
2075 /* privacy support preferred */
2076 if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 &&
2077 (wb->caps & IEEE80211_CAP_PRIVACY))
2078 return 1;
2079 if ((wa->caps & IEEE80211_CAP_PRIVACY) &&
2080 (wb->caps & IEEE80211_CAP_PRIVACY) == 0)
2081 return -1;
2082
2083 if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) {
2084 snr_a_full = wa->snr;
2085 snr_a = MIN(wa->snr, GREAT_SNR);
2086 snr_b_full = wb->snr;
2087 snr_b = MIN(wb->snr, GREAT_SNR);
2088 } else {
2089 /* Level is not in dBm, so we can't calculate
2090 * SNR. Just use raw level (units unknown). */
2091 snr_a = snr_a_full = wa->level;
2092 snr_b = snr_b_full = wb->level;
2093 }
2094
2095 /* If SNR is close, decide by max rate or frequency band. For cases
2096 * involving the 6 GHz band, use the throughput estimate irrespective
2097 * of the SNR difference since the LPI/VLP rules may result in
2098 * significant differences in SNR for cases where the estimated
2099 * throughput can be considerably higher with the lower SNR. */
2100 if (snr_a && snr_b && (abs(snr_b - snr_a) < 7 ||
2101 is_6ghz_freq(wa->freq) ||
2102 is_6ghz_freq(wb->freq))) {
2103 if (wa->est_throughput != wb->est_throughput)
2104 return (int) wb->est_throughput -
2105 (int) wa->est_throughput;
2106 }
2107 if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) ||
2108 (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) {
2109 if (is_6ghz_freq(wa->freq) ^ is_6ghz_freq(wb->freq))
2110 return is_6ghz_freq(wa->freq) ? -1 : 1;
2111 if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq))
2112 return IS_5GHZ(wa->freq) ? -1 : 1;
2113 }
2114
2115 /* all things being equal, use SNR; if SNRs are
2116 * identical, use quality values since some drivers may only report
2117 * that value and leave the signal level zero */
2118 if (snr_b_full == snr_a_full)
2119 return wb->qual - wa->qual;
2120 return snr_b_full - snr_a_full;
2121 #undef MIN
2122 }
2123
2124
2125 #ifdef CONFIG_WPS
2126 /* Compare function for sorting scan results when searching a WPS AP for
2127 * provisioning. Return >0 if @b is considered better. */
wpa_scan_result_wps_compar(const void * a,const void * b)2128 static int wpa_scan_result_wps_compar(const void *a, const void *b)
2129 {
2130 struct wpa_scan_res **_wa = (void *) a;
2131 struct wpa_scan_res **_wb = (void *) b;
2132 struct wpa_scan_res *wa = *_wa;
2133 struct wpa_scan_res *wb = *_wb;
2134 int uses_wps_a, uses_wps_b;
2135 struct wpabuf *wps_a, *wps_b;
2136 int res;
2137
2138 /* Optimization - check WPS IE existence before allocated memory and
2139 * doing full reassembly. */
2140 uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL;
2141 uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL;
2142 if (uses_wps_a && !uses_wps_b)
2143 return -1;
2144 if (!uses_wps_a && uses_wps_b)
2145 return 1;
2146
2147 if (uses_wps_a && uses_wps_b) {
2148 wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE);
2149 wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE);
2150 res = wps_ap_priority_compar(wps_a, wps_b);
2151 wpabuf_free(wps_a);
2152 wpabuf_free(wps_b);
2153 if (res)
2154 return res;
2155 }
2156
2157 /*
2158 * Do not use current AP security policy as a sorting criteria during
2159 * WPS provisioning step since the AP may get reconfigured at the
2160 * completion of provisioning.
2161 */
2162
2163 /* all things being equal, use signal level; if signal levels are
2164 * identical, use quality values since some drivers may only report
2165 * that value and leave the signal level zero */
2166 if (wb->level == wa->level)
2167 return wb->qual - wa->qual;
2168 return wb->level - wa->level;
2169 }
2170 #endif /* CONFIG_WPS */
2171
2172
dump_scan_res(struct wpa_scan_results * scan_res)2173 static void dump_scan_res(struct wpa_scan_results *scan_res)
2174 {
2175 #ifndef CONFIG_NO_STDOUT_DEBUG
2176 size_t i;
2177
2178 if (scan_res->res == NULL || scan_res->num == 0)
2179 return;
2180
2181 wpa_printf(MSG_EXCESSIVE, "Sorted scan results");
2182
2183 for (i = 0; i < scan_res->num; i++) {
2184 struct wpa_scan_res *r = scan_res->res[i];
2185 u8 *pos;
2186 if (r->flags & WPA_SCAN_LEVEL_DBM) {
2187 int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID);
2188
2189 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
2190 "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u",
2191 MAC2STR(r->bssid), r->freq, r->qual,
2192 r->noise, noise_valid ? "" : "~", r->level,
2193 r->snr, r->snr >= GREAT_SNR ? "*" : "",
2194 r->flags,
2195 r->age, r->est_throughput);
2196 } else {
2197 wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d "
2198 "noise=%d level=%d flags=0x%x age=%u est=%u",
2199 MAC2STR(r->bssid), r->freq, r->qual,
2200 r->noise, r->level, r->flags, r->age,
2201 r->est_throughput);
2202 }
2203 pos = (u8 *) (r + 1);
2204 if (r->ie_len)
2205 wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len);
2206 pos += r->ie_len;
2207 if (r->beacon_ie_len)
2208 wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs",
2209 pos, r->beacon_ie_len);
2210 }
2211 #endif /* CONFIG_NO_STDOUT_DEBUG */
2212 }
2213
2214
2215 /**
2216 * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed
2217 * @wpa_s: Pointer to wpa_supplicant data
2218 * @bssid: BSSID to check
2219 * Returns: 0 if the BSSID is filtered or 1 if not
2220 *
2221 * This function is used to filter out specific BSSIDs from scan reslts mainly
2222 * for testing purposes (SET bssid_filter ctrl_iface command).
2223 */
wpa_supplicant_filter_bssid_match(struct wpa_supplicant * wpa_s,const u8 * bssid)2224 int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s,
2225 const u8 *bssid)
2226 {
2227 size_t i;
2228
2229 if (wpa_s->bssid_filter == NULL)
2230 return 1;
2231
2232 for (i = 0; i < wpa_s->bssid_filter_count; i++) {
2233 if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid,
2234 ETH_ALEN) == 0)
2235 return 1;
2236 }
2237
2238 return 0;
2239 }
2240
2241
filter_scan_res(struct wpa_supplicant * wpa_s,struct wpa_scan_results * res)2242 void filter_scan_res(struct wpa_supplicant *wpa_s,
2243 struct wpa_scan_results *res)
2244 {
2245 size_t i, j;
2246
2247 if (wpa_s->bssid_filter == NULL)
2248 return;
2249
2250 for (i = 0, j = 0; i < res->num; i++) {
2251 if (wpa_supplicant_filter_bssid_match(wpa_s,
2252 res->res[i]->bssid)) {
2253 res->res[j++] = res->res[i];
2254 } else {
2255 os_free(res->res[i]);
2256 res->res[i] = NULL;
2257 }
2258 }
2259
2260 if (res->num != j) {
2261 wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
2262 (int) (res->num - j));
2263 res->num = j;
2264 }
2265 }
2266
2267
scan_snr(struct wpa_scan_res * res)2268 void scan_snr(struct wpa_scan_res *res)
2269 {
2270 if (res->flags & WPA_SCAN_NOISE_INVALID) {
2271 res->noise = is_6ghz_freq(res->freq) ?
2272 DEFAULT_NOISE_FLOOR_6GHZ :
2273 (IS_5GHZ(res->freq) ?
2274 DEFAULT_NOISE_FLOOR_5GHZ : DEFAULT_NOISE_FLOOR_2GHZ);
2275 }
2276
2277 if (res->flags & WPA_SCAN_LEVEL_DBM) {
2278 res->snr = res->level - res->noise;
2279 } else {
2280 /* Level is not in dBm, so we can't calculate
2281 * SNR. Just use raw level (units unknown). */
2282 res->snr = res->level;
2283 }
2284 }
2285
2286
2287 /* Minimum SNR required to achieve a certain bitrate. */
2288 struct minsnr_bitrate_entry {
2289 int minsnr;
2290 unsigned int bitrate; /* in Mbps */
2291 };
2292
2293 /* VHT needs to be enabled in order to achieve MCS8 and MCS9 rates. */
2294 static const int vht_mcs = 8;
2295
2296 static const struct minsnr_bitrate_entry vht20_table[] = {
2297 { 0, 0 },
2298 { 2, 6500 }, /* HT20 MCS0 */
2299 { 5, 13000 }, /* HT20 MCS1 */
2300 { 9, 19500 }, /* HT20 MCS2 */
2301 { 11, 26000 }, /* HT20 MCS3 */
2302 { 15, 39000 }, /* HT20 MCS4 */
2303 { 18, 52000 }, /* HT20 MCS5 */
2304 { 20, 58500 }, /* HT20 MCS6 */
2305 { 25, 65000 }, /* HT20 MCS7 */
2306 { 29, 78000 }, /* VHT20 MCS8 */
2307 { -1, 78000 } /* SNR > 29 */
2308 };
2309
2310 static const struct minsnr_bitrate_entry vht40_table[] = {
2311 { 0, 0 },
2312 { 5, 13500 }, /* HT40 MCS0 */
2313 { 8, 27000 }, /* HT40 MCS1 */
2314 { 12, 40500 }, /* HT40 MCS2 */
2315 { 14, 54000 }, /* HT40 MCS3 */
2316 { 18, 81000 }, /* HT40 MCS4 */
2317 { 21, 108000 }, /* HT40 MCS5 */
2318 { 23, 121500 }, /* HT40 MCS6 */
2319 { 28, 135000 }, /* HT40 MCS7 */
2320 { 32, 162000 }, /* VHT40 MCS8 */
2321 { 34, 180000 }, /* VHT40 MCS9 */
2322 { -1, 180000 } /* SNR > 34 */
2323 };
2324
2325 static const struct minsnr_bitrate_entry vht80_table[] = {
2326 { 0, 0 },
2327 { 8, 29300 }, /* VHT80 MCS0 */
2328 { 11, 58500 }, /* VHT80 MCS1 */
2329 { 15, 87800 }, /* VHT80 MCS2 */
2330 { 17, 117000 }, /* VHT80 MCS3 */
2331 { 21, 175500 }, /* VHT80 MCS4 */
2332 { 24, 234000 }, /* VHT80 MCS5 */
2333 { 26, 263300 }, /* VHT80 MCS6 */
2334 { 31, 292500 }, /* VHT80 MCS7 */
2335 { 35, 351000 }, /* VHT80 MCS8 */
2336 { 37, 390000 }, /* VHT80 MCS9 */
2337 { -1, 390000 } /* SNR > 37 */
2338 };
2339
2340
2341 static const struct minsnr_bitrate_entry vht160_table[] = {
2342 { 0, 0 },
2343 { 11, 58500 }, /* VHT160 MCS0 */
2344 { 14, 117000 }, /* VHT160 MCS1 */
2345 { 18, 175500 }, /* VHT160 MCS2 */
2346 { 20, 234000 }, /* VHT160 MCS3 */
2347 { 24, 351000 }, /* VHT160 MCS4 */
2348 { 27, 468000 }, /* VHT160 MCS5 */
2349 { 29, 526500 }, /* VHT160 MCS6 */
2350 { 34, 585000 }, /* VHT160 MCS7 */
2351 { 38, 702000 }, /* VHT160 MCS8 */
2352 { 40, 780000 }, /* VHT160 MCS9 */
2353 { -1, 780000 } /* SNR > 37 */
2354 };
2355
2356
2357 static const struct minsnr_bitrate_entry he20_table[] = {
2358 { 0, 0 },
2359 { 2, 8600 }, /* HE20 MCS0 */
2360 { 5, 17200 }, /* HE20 MCS1 */
2361 { 9, 25800 }, /* HE20 MCS2 */
2362 { 11, 34400 }, /* HE20 MCS3 */
2363 { 15, 51600 }, /* HE20 MCS4 */
2364 { 18, 68800 }, /* HE20 MCS5 */
2365 { 20, 77400 }, /* HE20 MCS6 */
2366 { 25, 86000 }, /* HE20 MCS7 */
2367 { 29, 103200 }, /* HE20 MCS8 */
2368 { 31, 114700 }, /* HE20 MCS9 */
2369 { 34, 129000 }, /* HE20 MCS10 */
2370 { 36, 143400 }, /* HE20 MCS11 */
2371 { -1, 143400 } /* SNR > 29 */
2372 };
2373
2374 static const struct minsnr_bitrate_entry he40_table[] = {
2375 { 0, 0 },
2376 { 5, 17200 }, /* HE40 MCS0 */
2377 { 8, 34400 }, /* HE40 MCS1 */
2378 { 12, 51600 }, /* HE40 MCS2 */
2379 { 14, 68800 }, /* HE40 MCS3 */
2380 { 18, 103200 }, /* HE40 MCS4 */
2381 { 21, 137600 }, /* HE40 MCS5 */
2382 { 23, 154900 }, /* HE40 MCS6 */
2383 { 28, 172100 }, /* HE40 MCS7 */
2384 { 32, 206500 }, /* HE40 MCS8 */
2385 { 34, 229400 }, /* HE40 MCS9 */
2386 { 37, 258100 }, /* HE40 MCS10 */
2387 { 39, 286800 }, /* HE40 MCS11 */
2388 { -1, 286800 } /* SNR > 34 */
2389 };
2390
2391 static const struct minsnr_bitrate_entry he80_table[] = {
2392 { 0, 0 },
2393 { 8, 36000 }, /* HE80 MCS0 */
2394 { 11, 72100 }, /* HE80 MCS1 */
2395 { 15, 108100 }, /* HE80 MCS2 */
2396 { 17, 144100 }, /* HE80 MCS3 */
2397 { 21, 216200 }, /* HE80 MCS4 */
2398 { 24, 288200 }, /* HE80 MCS5 */
2399 { 26, 324300 }, /* HE80 MCS6 */
2400 { 31, 360300 }, /* HE80 MCS7 */
2401 { 35, 432400 }, /* HE80 MCS8 */
2402 { 37, 480400 }, /* HE80 MCS9 */
2403 { 40, 540400 }, /* HE80 MCS10 */
2404 { 42, 600500 }, /* HE80 MCS11 */
2405 { -1, 600500 } /* SNR > 37 */
2406 };
2407
2408
2409 static const struct minsnr_bitrate_entry he160_table[] = {
2410 { 0, 0 },
2411 { 11, 72100 }, /* HE160 MCS0 */
2412 { 14, 144100 }, /* HE160 MCS1 */
2413 { 18, 216200 }, /* HE160 MCS2 */
2414 { 20, 288200 }, /* HE160 MCS3 */
2415 { 24, 432400 }, /* HE160 MCS4 */
2416 { 27, 576500 }, /* HE160 MCS5 */
2417 { 29, 648500 }, /* HE160 MCS6 */
2418 { 34, 720600 }, /* HE160 MCS7 */
2419 { 38, 864700 }, /* HE160 MCS8 */
2420 { 40, 960800 }, /* HE160 MCS9 */
2421 { 43, 1080900 }, /* HE160 MCS10 */
2422 { 45, 1201000 }, /* HE160 MCS11 */
2423 { -1, 1201000 } /* SNR > 37 */
2424 };
2425
2426
interpolate_rate(int snr,int snr0,int snr1,int rate0,int rate1)2427 static unsigned int interpolate_rate(int snr, int snr0, int snr1,
2428 int rate0, int rate1)
2429 {
2430 return rate0 + (snr - snr0) * (rate1 - rate0) / (snr1 - snr0);
2431 }
2432
2433
max_rate(const struct minsnr_bitrate_entry table[],int snr,bool vht)2434 static unsigned int max_rate(const struct minsnr_bitrate_entry table[],
2435 int snr, bool vht)
2436 {
2437 const struct minsnr_bitrate_entry *prev, *entry = table;
2438
2439 while ((entry->minsnr != -1) &&
2440 (snr >= entry->minsnr) &&
2441 (vht || entry - table <= vht_mcs))
2442 entry++;
2443 if (entry == table)
2444 return entry->bitrate;
2445 prev = entry - 1;
2446 if (entry->minsnr == -1 || (!vht && entry - table > vht_mcs))
2447 return prev->bitrate;
2448 return interpolate_rate(snr, prev->minsnr, entry->minsnr, prev->bitrate,
2449 entry->bitrate);
2450 }
2451
2452
max_ht20_rate(int snr,bool vht)2453 static unsigned int max_ht20_rate(int snr, bool vht)
2454 {
2455 return max_rate(vht20_table, snr, vht);
2456 }
2457
2458
max_ht40_rate(int snr,bool vht)2459 static unsigned int max_ht40_rate(int snr, bool vht)
2460 {
2461 return max_rate(vht40_table, snr, vht);
2462 }
2463
2464
max_vht80_rate(int snr)2465 static unsigned int max_vht80_rate(int snr)
2466 {
2467 return max_rate(vht80_table, snr, 1);
2468 }
2469
2470
max_vht160_rate(int snr)2471 static unsigned int max_vht160_rate(int snr)
2472 {
2473 return max_rate(vht160_table, snr, 1);
2474 }
2475
2476
max_he_rate(const struct minsnr_bitrate_entry table[],int snr)2477 static unsigned int max_he_rate(const struct minsnr_bitrate_entry table[],
2478 int snr)
2479 {
2480 const struct minsnr_bitrate_entry *prev, *entry = table;
2481
2482 while (entry->minsnr != -1 && snr >= entry->minsnr)
2483 entry++;
2484 if (entry == table)
2485 return 0;
2486 prev = entry - 1;
2487 if (entry->minsnr == -1)
2488 return prev->bitrate;
2489 return interpolate_rate(snr, prev->minsnr, entry->minsnr,
2490 prev->bitrate, entry->bitrate);
2491 }
2492
2493
wpas_get_est_tpt(const struct wpa_supplicant * wpa_s,const u8 * ies,size_t ies_len,int rate,int snr,int freq)2494 unsigned int wpas_get_est_tpt(const struct wpa_supplicant *wpa_s,
2495 const u8 *ies, size_t ies_len, int rate,
2496 int snr, int freq)
2497 {
2498 struct hostapd_hw_modes *hw_mode;
2499 unsigned int est, tmp;
2500 const u8 *ie;
2501
2502 /* Limit based on estimated SNR */
2503 if (rate > 1 * 2 && snr < 1)
2504 rate = 1 * 2;
2505 else if (rate > 2 * 2 && snr < 4)
2506 rate = 2 * 2;
2507 else if (rate > 6 * 2 && snr < 5)
2508 rate = 6 * 2;
2509 else if (rate > 9 * 2 && snr < 6)
2510 rate = 9 * 2;
2511 else if (rate > 12 * 2 && snr < 7)
2512 rate = 12 * 2;
2513 else if (rate > 12 * 2 && snr < 8)
2514 rate = 14 * 2;
2515 else if (rate > 12 * 2 && snr < 9)
2516 rate = 16 * 2;
2517 else if (rate > 18 * 2 && snr < 10)
2518 rate = 18 * 2;
2519 else if (rate > 24 * 2 && snr < 11)
2520 rate = 24 * 2;
2521 else if (rate > 24 * 2 && snr < 12)
2522 rate = 27 * 2;
2523 else if (rate > 24 * 2 && snr < 13)
2524 rate = 30 * 2;
2525 else if (rate > 24 * 2 && snr < 14)
2526 rate = 33 * 2;
2527 else if (rate > 36 * 2 && snr < 15)
2528 rate = 36 * 2;
2529 else if (rate > 36 * 2 && snr < 16)
2530 rate = 39 * 2;
2531 else if (rate > 36 * 2 && snr < 17)
2532 rate = 42 * 2;
2533 else if (rate > 36 * 2 && snr < 18)
2534 rate = 45 * 2;
2535 else if (rate > 48 * 2 && snr < 19)
2536 rate = 48 * 2;
2537 else if (rate > 48 * 2 && snr < 20)
2538 rate = 51 * 2;
2539 else if (rate > 54 * 2 && snr < 21)
2540 rate = 54 * 2;
2541 est = rate * 500;
2542
2543 hw_mode = get_mode_with_freq(wpa_s->hw.modes, wpa_s->hw.num_modes,
2544 freq);
2545
2546 if (hw_mode && hw_mode->ht_capab) {
2547 ie = get_ie(ies, ies_len, WLAN_EID_HT_CAP);
2548 if (ie) {
2549 tmp = max_ht20_rate(snr, false);
2550 if (tmp > est)
2551 est = tmp;
2552 }
2553 }
2554
2555 if (hw_mode &&
2556 (hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
2557 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
2558 if (ie && ie[1] >= 2 &&
2559 (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2560 tmp = max_ht40_rate(snr, false);
2561 if (tmp > est)
2562 est = tmp;
2563 }
2564 }
2565
2566 if (hw_mode && hw_mode->vht_capab) {
2567 /* Use +1 to assume VHT is always faster than HT */
2568 ie = get_ie(ies, ies_len, WLAN_EID_VHT_CAP);
2569 if (ie) {
2570 bool vht80 = false, vht160 = false;
2571
2572 tmp = max_ht20_rate(snr, true) + 1;
2573 if (tmp > est)
2574 est = tmp;
2575
2576 ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
2577 if (ie && ie[1] >= 2 &&
2578 (ie[3] &
2579 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) {
2580 tmp = max_ht40_rate(snr, true) + 1;
2581 if (tmp > est)
2582 est = tmp;
2583 }
2584
2585 /* Determine VHT BSS bandwidth based on IEEE Std
2586 * 802.11-2020, Table 11-23 (VHT BSs bandwidth) */
2587 ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
2588 if (ie && ie[1] >= 3) {
2589 u8 cw = ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK;
2590 u8 seg0 = ie[3];
2591 u8 seg1 = ie[4];
2592
2593 if (cw)
2594 vht80 = true;
2595 if (cw == 2 ||
2596 (cw == 3 &&
2597 (seg1 > 0 && abs(seg1 - seg0) == 16)))
2598 vht160 = true;
2599 if (cw == 1 &&
2600 ((seg1 > 0 && abs(seg1 - seg0) == 8) ||
2601 (seg1 > 0 && abs(seg1 - seg0) == 16)))
2602 vht160 = true;
2603 }
2604
2605 if (vht80) {
2606 tmp = max_vht80_rate(snr) + 1;
2607 if (tmp > est)
2608 est = tmp;
2609 }
2610
2611 if (vht160 &&
2612 (hw_mode->vht_capab &
2613 (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
2614 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
2615 tmp = max_vht160_rate(snr) + 1;
2616 if (tmp > est)
2617 est = tmp;
2618 }
2619 }
2620 }
2621
2622 if (hw_mode && hw_mode->he_capab[IEEE80211_MODE_INFRA].he_supported) {
2623 /* Use +2 to assume HE is always faster than HT/VHT */
2624 struct ieee80211_he_capabilities *he;
2625 struct he_capabilities *own_he;
2626 u8 cw;
2627
2628 ie = get_ie_ext(ies, ies_len, WLAN_EID_EXT_HE_CAPABILITIES);
2629 if (!ie || (ie[1] < 1 + IEEE80211_HE_CAPAB_MIN_LEN))
2630 return est;
2631 he = (struct ieee80211_he_capabilities *) &ie[3];
2632 own_he = &hw_mode->he_capab[IEEE80211_MODE_INFRA];
2633
2634 tmp = max_he_rate(he20_table, snr) + 2;
2635 if (tmp > est)
2636 est = tmp;
2637
2638 cw = he->he_phy_capab_info[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
2639 own_he->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX];
2640 if (cw &
2641 (IS_2P4GHZ(freq) ? HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G :
2642 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
2643 tmp = max_he_rate(he40_table, snr) + 2;
2644 if (tmp > est)
2645 est = tmp;
2646 }
2647
2648 if (!IS_2P4GHZ(freq) &&
2649 (cw & HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
2650 tmp = max_he_rate(he80_table, snr) + 2;
2651 if (tmp > est)
2652 est = tmp;
2653 }
2654
2655 if (!IS_2P4GHZ(freq) &&
2656 (cw & (HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2657 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G))) {
2658 tmp = max_he_rate(he160_table, snr) + 2;
2659 if (tmp > est)
2660 est = tmp;
2661 }
2662 }
2663
2664 return est;
2665 }
2666
2667
scan_est_throughput(struct wpa_supplicant * wpa_s,struct wpa_scan_res * res)2668 void scan_est_throughput(struct wpa_supplicant *wpa_s,
2669 struct wpa_scan_res *res)
2670 {
2671 int rate; /* max legacy rate in 500 kb/s units */
2672 int snr = res->snr;
2673 const u8 *ies = (const void *) (res + 1);
2674 size_t ie_len = res->ie_len;
2675
2676 if (res->est_throughput)
2677 return;
2678
2679 /* Get maximum legacy rate */
2680 rate = wpa_scan_get_max_rate(res);
2681
2682 if (!ie_len)
2683 ie_len = res->beacon_ie_len;
2684 res->est_throughput =
2685 wpas_get_est_tpt(wpa_s, ies, ie_len, rate, snr, res->freq);
2686
2687 /* TODO: channel utilization and AP load (e.g., from AP Beacon) */
2688 }
2689
2690
2691 /**
2692 * wpa_supplicant_get_scan_results - Get scan results
2693 * @wpa_s: Pointer to wpa_supplicant data
2694 * @info: Information about what was scanned or %NULL if not available
2695 * @new_scan: Whether a new scan was performed
2696 * Returns: Scan results, %NULL on failure
2697 *
2698 * This function request the current scan results from the driver and updates
2699 * the local BSS list wpa_s->bss. The caller is responsible for freeing the
2700 * results with wpa_scan_results_free().
2701 */
2702 struct wpa_scan_results *
wpa_supplicant_get_scan_results(struct wpa_supplicant * wpa_s,struct scan_info * info,int new_scan)2703 wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
2704 struct scan_info *info, int new_scan)
2705 {
2706 struct wpa_scan_results *scan_res;
2707 size_t i;
2708 int (*compar)(const void *, const void *) = wpa_scan_result_compar;
2709
2710 scan_res = wpa_drv_get_scan_results2(wpa_s);
2711 if (scan_res == NULL) {
2712 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
2713 return NULL;
2714 }
2715 if (scan_res->fetch_time.sec == 0) {
2716 /*
2717 * Make sure we have a valid timestamp if the driver wrapper
2718 * does not set this.
2719 */
2720 os_get_reltime(&scan_res->fetch_time);
2721 }
2722 filter_scan_res(wpa_s, scan_res);
2723
2724 for (i = 0; i < scan_res->num; i++) {
2725 struct wpa_scan_res *scan_res_item = scan_res->res[i];
2726
2727 scan_snr(scan_res_item);
2728 scan_est_throughput(wpa_s, scan_res_item);
2729 }
2730
2731 #ifdef CONFIG_WPS
2732 if (wpas_wps_searching(wpa_s)) {
2733 wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
2734 "provisioning rules");
2735 compar = wpa_scan_result_wps_compar;
2736 }
2737 #endif /* CONFIG_WPS */
2738
2739 if (scan_res->res) {
2740 qsort(scan_res->res, scan_res->num,
2741 sizeof(struct wpa_scan_res *), compar);
2742 }
2743 dump_scan_res(scan_res);
2744
2745 if (wpa_s->ignore_post_flush_scan_res) {
2746 /* FLUSH command aborted an ongoing scan and these are the
2747 * results from the aborted scan. Do not process the results to
2748 * maintain flushed state. */
2749 wpa_dbg(wpa_s, MSG_DEBUG,
2750 "Do not update BSS table based on pending post-FLUSH scan results");
2751 wpa_s->ignore_post_flush_scan_res = 0;
2752 return scan_res;
2753 }
2754
2755 wpa_bss_update_start(wpa_s);
2756 for (i = 0; i < scan_res->num; i++)
2757 wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
2758 &scan_res->fetch_time);
2759 wpa_bss_update_end(wpa_s, info, new_scan);
2760
2761 return scan_res;
2762 }
2763
2764
2765 /**
2766 * wpa_supplicant_update_scan_results - Update scan results from the driver
2767 * @wpa_s: Pointer to wpa_supplicant data
2768 * Returns: 0 on success, -1 on failure
2769 *
2770 * This function updates the BSS table within wpa_supplicant based on the
2771 * currently available scan results from the driver without requesting a new
2772 * scan. This is used in cases where the driver indicates an association
2773 * (including roaming within ESS) and wpa_supplicant does not yet have the
2774 * needed information to complete the connection (e.g., to perform validation
2775 * steps in 4-way handshake).
2776 */
wpa_supplicant_update_scan_results(struct wpa_supplicant * wpa_s)2777 int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
2778 {
2779 struct wpa_scan_results *scan_res;
2780 scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
2781 if (scan_res == NULL)
2782 return -1;
2783 wpa_scan_results_free(scan_res);
2784
2785 return 0;
2786 }
2787
2788
2789 /**
2790 * scan_only_handler - Reports scan results
2791 */
scan_only_handler(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)2792 void scan_only_handler(struct wpa_supplicant *wpa_s,
2793 struct wpa_scan_results *scan_res)
2794 {
2795 wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received");
2796 if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2797 wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
2798 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
2799 wpa_s->manual_scan_id);
2800 wpa_s->manual_scan_use_id = 0;
2801 } else {
2802 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
2803 }
2804 wpas_notify_scan_results(wpa_s);
2805 wpas_notify_scan_done(wpa_s, 1);
2806 if (wpa_s->scan_work) {
2807 struct wpa_radio_work *work = wpa_s->scan_work;
2808 wpa_s->scan_work = NULL;
2809 radio_work_done(work);
2810 }
2811
2812 if (wpa_s->wpa_state == WPA_SCANNING)
2813 wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state);
2814 }
2815
2816
wpas_scan_scheduled(struct wpa_supplicant * wpa_s)2817 int wpas_scan_scheduled(struct wpa_supplicant *wpa_s)
2818 {
2819 return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL);
2820 }
2821
2822
2823 struct wpa_driver_scan_params *
wpa_scan_clone_params(const struct wpa_driver_scan_params * src)2824 wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
2825 {
2826 struct wpa_driver_scan_params *params;
2827 size_t i;
2828 u8 *n;
2829
2830 params = os_zalloc(sizeof(*params));
2831 if (params == NULL)
2832 return NULL;
2833
2834 for (i = 0; i < src->num_ssids; i++) {
2835 if (src->ssids[i].ssid) {
2836 n = os_memdup(src->ssids[i].ssid,
2837 src->ssids[i].ssid_len);
2838 if (n == NULL)
2839 goto failed;
2840 params->ssids[i].ssid = n;
2841 params->ssids[i].ssid_len = src->ssids[i].ssid_len;
2842 }
2843 }
2844 params->num_ssids = src->num_ssids;
2845
2846 if (src->extra_ies) {
2847 n = os_memdup(src->extra_ies, src->extra_ies_len);
2848 if (n == NULL)
2849 goto failed;
2850 params->extra_ies = n;
2851 params->extra_ies_len = src->extra_ies_len;
2852 }
2853
2854 if (src->freqs) {
2855 int len = int_array_len(src->freqs);
2856 params->freqs = os_memdup(src->freqs, (len + 1) * sizeof(int));
2857 if (params->freqs == NULL)
2858 goto failed;
2859 }
2860
2861 if (src->filter_ssids) {
2862 params->filter_ssids = os_memdup(src->filter_ssids,
2863 sizeof(*params->filter_ssids) *
2864 src->num_filter_ssids);
2865 if (params->filter_ssids == NULL)
2866 goto failed;
2867 params->num_filter_ssids = src->num_filter_ssids;
2868 }
2869
2870 params->filter_rssi = src->filter_rssi;
2871 params->p2p_probe = src->p2p_probe;
2872 params->only_new_results = src->only_new_results;
2873 params->low_priority = src->low_priority;
2874 params->duration = src->duration;
2875 params->duration_mandatory = src->duration_mandatory;
2876 params->oce_scan = src->oce_scan;
2877
2878 if (src->sched_scan_plans_num > 0) {
2879 params->sched_scan_plans =
2880 os_memdup(src->sched_scan_plans,
2881 sizeof(*src->sched_scan_plans) *
2882 src->sched_scan_plans_num);
2883 if (!params->sched_scan_plans)
2884 goto failed;
2885
2886 params->sched_scan_plans_num = src->sched_scan_plans_num;
2887 }
2888
2889 if (src->mac_addr_rand &&
2890 wpa_setup_mac_addr_rand_params(params, src->mac_addr))
2891 goto failed;
2892
2893 if (src->bssid) {
2894 u8 *bssid;
2895
2896 bssid = os_memdup(src->bssid, ETH_ALEN);
2897 if (!bssid)
2898 goto failed;
2899 params->bssid = bssid;
2900 }
2901
2902 params->relative_rssi_set = src->relative_rssi_set;
2903 params->relative_rssi = src->relative_rssi;
2904 params->relative_adjust_band = src->relative_adjust_band;
2905 params->relative_adjust_rssi = src->relative_adjust_rssi;
2906 params->p2p_include_6ghz = src->p2p_include_6ghz;
2907 return params;
2908
2909 failed:
2910 wpa_scan_free_params(params);
2911 return NULL;
2912 }
2913
2914
wpa_scan_free_params(struct wpa_driver_scan_params * params)2915 void wpa_scan_free_params(struct wpa_driver_scan_params *params)
2916 {
2917 size_t i;
2918
2919 if (params == NULL)
2920 return;
2921
2922 for (i = 0; i < params->num_ssids; i++)
2923 os_free((u8 *) params->ssids[i].ssid);
2924 os_free((u8 *) params->extra_ies);
2925 os_free(params->freqs);
2926 os_free(params->filter_ssids);
2927 os_free(params->sched_scan_plans);
2928
2929 /*
2930 * Note: params->mac_addr_mask points to same memory allocation and
2931 * must not be freed separately.
2932 */
2933 os_free((u8 *) params->mac_addr);
2934
2935 os_free((u8 *) params->bssid);
2936
2937 os_free(params);
2938 }
2939
2940
wpas_start_pno(struct wpa_supplicant * wpa_s)2941 int wpas_start_pno(struct wpa_supplicant *wpa_s)
2942 {
2943 int ret;
2944 size_t prio, i, num_ssid, num_match_ssid;
2945 struct wpa_ssid *ssid;
2946 struct wpa_driver_scan_params params;
2947 struct sched_scan_plan scan_plan;
2948 unsigned int max_sched_scan_ssids;
2949
2950 if (!wpa_s->sched_scan_supported)
2951 return -1;
2952
2953 if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS)
2954 max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS;
2955 else
2956 max_sched_scan_ssids = wpa_s->max_sched_scan_ssids;
2957 if (max_sched_scan_ssids < 1)
2958 return -1;
2959
2960 if (wpa_s->pno || wpa_s->pno_sched_pending)
2961 return 0;
2962
2963 if ((wpa_s->wpa_state > WPA_SCANNING) &&
2964 (wpa_s->wpa_state < WPA_COMPLETED)) {
2965 wpa_printf(MSG_ERROR, "PNO: In assoc process");
2966 return -EAGAIN;
2967 }
2968
2969 if (wpa_s->wpa_state == WPA_SCANNING) {
2970 wpa_supplicant_cancel_scan(wpa_s);
2971 if (wpa_s->sched_scanning) {
2972 wpa_printf(MSG_DEBUG, "Schedule PNO on completion of "
2973 "ongoing sched scan");
2974 wpa_supplicant_cancel_sched_scan(wpa_s);
2975 wpa_s->pno_sched_pending = 1;
2976 return 0;
2977 }
2978 }
2979
2980 if (wpa_s->sched_scan_stop_req) {
2981 wpa_printf(MSG_DEBUG,
2982 "Schedule PNO after previous sched scan has stopped");
2983 wpa_s->pno_sched_pending = 1;
2984 return 0;
2985 }
2986
2987 os_memset(¶ms, 0, sizeof(params));
2988
2989 num_ssid = num_match_ssid = 0;
2990 ssid = wpa_s->conf->ssid;
2991 while (ssid) {
2992 if (!wpas_network_disabled(wpa_s, ssid)) {
2993 num_match_ssid++;
2994 if (ssid->scan_ssid)
2995 num_ssid++;
2996 }
2997 ssid = ssid->next;
2998 }
2999
3000 if (num_match_ssid == 0) {
3001 wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
3002 return -1;
3003 }
3004
3005 if (num_match_ssid > num_ssid) {
3006 params.num_ssids++; /* wildcard */
3007 num_ssid++;
3008 }
3009
3010 if (num_ssid > max_sched_scan_ssids) {
3011 wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
3012 "%u", max_sched_scan_ssids, (unsigned int) num_ssid);
3013 num_ssid = max_sched_scan_ssids;
3014 }
3015
3016 if (num_match_ssid > wpa_s->max_match_sets) {
3017 num_match_ssid = wpa_s->max_match_sets;
3018 wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match");
3019 }
3020 params.filter_ssids = os_calloc(num_match_ssid,
3021 sizeof(struct wpa_driver_scan_filter));
3022 if (params.filter_ssids == NULL)
3023 return -1;
3024
3025 i = 0;
3026 prio = 0;
3027 ssid = wpa_s->conf->pssid[prio];
3028 while (ssid) {
3029 if (!wpas_network_disabled(wpa_s, ssid)) {
3030 if (ssid->scan_ssid && params.num_ssids < num_ssid) {
3031 params.ssids[params.num_ssids].ssid =
3032 ssid->ssid;
3033 params.ssids[params.num_ssids].ssid_len =
3034 ssid->ssid_len;
3035 params.num_ssids++;
3036 }
3037 os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
3038 ssid->ssid_len);
3039 params.filter_ssids[i].ssid_len = ssid->ssid_len;
3040 params.num_filter_ssids++;
3041 i++;
3042 if (i == num_match_ssid)
3043 break;
3044 }
3045 if (ssid->pnext)
3046 ssid = ssid->pnext;
3047 else if (prio + 1 == wpa_s->conf->num_prio)
3048 break;
3049 else
3050 ssid = wpa_s->conf->pssid[++prio];
3051 }
3052
3053 if (wpa_s->conf->filter_rssi)
3054 params.filter_rssi = wpa_s->conf->filter_rssi;
3055
3056 if (wpa_s->sched_scan_plans_num) {
3057 params.sched_scan_plans = wpa_s->sched_scan_plans;
3058 params.sched_scan_plans_num = wpa_s->sched_scan_plans_num;
3059 } else {
3060 /* Set one scan plan that will run infinitely */
3061 if (wpa_s->conf->sched_scan_interval)
3062 scan_plan.interval = wpa_s->conf->sched_scan_interval;
3063 else
3064 scan_plan.interval = 10;
3065
3066 scan_plan.iterations = 0;
3067 params.sched_scan_plans = &scan_plan;
3068 params.sched_scan_plans_num = 1;
3069 }
3070
3071 params.sched_scan_start_delay = wpa_s->conf->sched_scan_start_delay;
3072
3073 if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) {
3074 wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels");
3075 params.freqs = wpa_s->manual_sched_scan_freqs;
3076 }
3077
3078 if ((wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) &&
3079 wpa_s->wpa_state <= WPA_SCANNING)
3080 wpa_setup_mac_addr_rand_params(¶ms, wpa_s->mac_addr_pno);
3081
3082 wpa_scan_set_relative_rssi_params(wpa_s, ¶ms);
3083
3084 ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms);
3085 os_free(params.filter_ssids);
3086 os_free(params.mac_addr);
3087 if (ret == 0)
3088 wpa_s->pno = 1;
3089 else
3090 wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO");
3091 return ret;
3092 }
3093
3094
wpas_stop_pno(struct wpa_supplicant * wpa_s)3095 int wpas_stop_pno(struct wpa_supplicant *wpa_s)
3096 {
3097 int ret = 0;
3098
3099 if (!wpa_s->pno)
3100 return 0;
3101
3102 ret = wpa_supplicant_stop_sched_scan(wpa_s);
3103 wpa_s->sched_scan_stop_req = 1;
3104
3105 wpa_s->pno = 0;
3106 wpa_s->pno_sched_pending = 0;
3107
3108 if (wpa_s->wpa_state == WPA_SCANNING)
3109 wpa_supplicant_req_scan(wpa_s, 0, 0);
3110
3111 return ret;
3112 }
3113
3114
wpas_mac_addr_rand_scan_clear(struct wpa_supplicant * wpa_s,unsigned int type)3115 void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s,
3116 unsigned int type)
3117 {
3118 type &= MAC_ADDR_RAND_ALL;
3119 wpa_s->mac_addr_rand_enable &= ~type;
3120
3121 if (type & MAC_ADDR_RAND_SCAN) {
3122 os_free(wpa_s->mac_addr_scan);
3123 wpa_s->mac_addr_scan = NULL;
3124 }
3125
3126 if (type & MAC_ADDR_RAND_SCHED_SCAN) {
3127 os_free(wpa_s->mac_addr_sched_scan);
3128 wpa_s->mac_addr_sched_scan = NULL;
3129 }
3130
3131 if (type & MAC_ADDR_RAND_PNO) {
3132 os_free(wpa_s->mac_addr_pno);
3133 wpa_s->mac_addr_pno = NULL;
3134 }
3135 }
3136
3137
wpas_mac_addr_rand_scan_set(struct wpa_supplicant * wpa_s,unsigned int type,const u8 * addr,const u8 * mask)3138 int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s,
3139 unsigned int type, const u8 *addr,
3140 const u8 *mask)
3141 {
3142 u8 *tmp = NULL;
3143
3144 if ((wpa_s->mac_addr_rand_supported & type) != type ) {
3145 wpa_printf(MSG_INFO,
3146 "scan: MAC randomization type %u != supported=%u",
3147 type, wpa_s->mac_addr_rand_supported);
3148 return -1;
3149 }
3150
3151 wpas_mac_addr_rand_scan_clear(wpa_s, type);
3152
3153 if (addr) {
3154 tmp = os_malloc(2 * ETH_ALEN);
3155 if (!tmp)
3156 return -1;
3157 os_memcpy(tmp, addr, ETH_ALEN);
3158 os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN);
3159 }
3160
3161 if (type == MAC_ADDR_RAND_SCAN) {
3162 wpa_s->mac_addr_scan = tmp;
3163 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
3164 wpa_s->mac_addr_sched_scan = tmp;
3165 } else if (type == MAC_ADDR_RAND_PNO) {
3166 wpa_s->mac_addr_pno = tmp;
3167 } else {
3168 wpa_printf(MSG_INFO,
3169 "scan: Invalid MAC randomization type=0x%x",
3170 type);
3171 os_free(tmp);
3172 return -1;
3173 }
3174
3175 wpa_s->mac_addr_rand_enable |= type;
3176 return 0;
3177 }
3178
3179
wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant * wpa_s,unsigned int type,u8 * mask)3180 int wpas_mac_addr_rand_scan_get_mask(struct wpa_supplicant *wpa_s,
3181 unsigned int type, u8 *mask)
3182 {
3183 const u8 *to_copy;
3184
3185 if ((wpa_s->mac_addr_rand_enable & type) != type)
3186 return -1;
3187
3188 if (type == MAC_ADDR_RAND_SCAN) {
3189 to_copy = wpa_s->mac_addr_scan;
3190 } else if (type == MAC_ADDR_RAND_SCHED_SCAN) {
3191 to_copy = wpa_s->mac_addr_sched_scan;
3192 } else if (type == MAC_ADDR_RAND_PNO) {
3193 to_copy = wpa_s->mac_addr_pno;
3194 } else {
3195 wpa_printf(MSG_DEBUG,
3196 "scan: Invalid MAC randomization type=0x%x",
3197 type);
3198 return -1;
3199 }
3200
3201 os_memcpy(mask, to_copy + ETH_ALEN, ETH_ALEN);
3202 return 0;
3203 }
3204
3205
wpas_abort_ongoing_scan(struct wpa_supplicant * wpa_s)3206 int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s)
3207 {
3208 struct wpa_radio_work *work;
3209 struct wpa_radio *radio = wpa_s->radio;
3210
3211 dl_list_for_each(work, &radio->work, struct wpa_radio_work, list) {
3212 if (work->wpa_s != wpa_s || !work->started ||
3213 (os_strcmp(work->type, "scan") != 0 &&
3214 os_strcmp(work->type, "p2p-scan") != 0))
3215 continue;
3216 wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan");
3217 return wpa_drv_abort_scan(wpa_s, wpa_s->curr_scan_cookie);
3218 }
3219
3220 wpa_dbg(wpa_s, MSG_DEBUG, "No ongoing scan/p2p-scan found to abort");
3221 return -1;
3222 }
3223
3224
wpas_sched_scan_plans_set(struct wpa_supplicant * wpa_s,const char * cmd)3225 int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
3226 {
3227 struct sched_scan_plan *scan_plans = NULL;
3228 const char *token, *context = NULL;
3229 unsigned int num = 0;
3230
3231 if (!cmd)
3232 return -1;
3233
3234 if (!cmd[0]) {
3235 wpa_printf(MSG_DEBUG, "Clear sched scan plans");
3236 os_free(wpa_s->sched_scan_plans);
3237 wpa_s->sched_scan_plans = NULL;
3238 wpa_s->sched_scan_plans_num = 0;
3239 return 0;
3240 }
3241
3242 while ((token = cstr_token(cmd, " ", &context))) {
3243 int ret;
3244 struct sched_scan_plan *scan_plan, *n;
3245
3246 n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans));
3247 if (!n)
3248 goto fail;
3249
3250 scan_plans = n;
3251 scan_plan = &scan_plans[num];
3252 num++;
3253
3254 ret = sscanf(token, "%u:%u", &scan_plan->interval,
3255 &scan_plan->iterations);
3256 if (ret <= 0 || ret > 2 || !scan_plan->interval) {
3257 wpa_printf(MSG_ERROR,
3258 "Invalid sched scan plan input: %s", token);
3259 goto fail;
3260 }
3261
3262 if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) {
3263 wpa_printf(MSG_WARNING,
3264 "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)",
3265 num, scan_plan->interval,
3266 wpa_s->max_sched_scan_plan_interval);
3267 scan_plan->interval =
3268 wpa_s->max_sched_scan_plan_interval;
3269 }
3270
3271 if (ret == 1) {
3272 scan_plan->iterations = 0;
3273 break;
3274 }
3275
3276 if (!scan_plan->iterations) {
3277 wpa_printf(MSG_ERROR,
3278 "scan plan %u: Number of iterations cannot be zero",
3279 num);
3280 goto fail;
3281 }
3282
3283 if (scan_plan->iterations >
3284 wpa_s->max_sched_scan_plan_iterations) {
3285 wpa_printf(MSG_WARNING,
3286 "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)",
3287 num, scan_plan->iterations,
3288 wpa_s->max_sched_scan_plan_iterations);
3289 scan_plan->iterations =
3290 wpa_s->max_sched_scan_plan_iterations;
3291 }
3292
3293 wpa_printf(MSG_DEBUG,
3294 "scan plan %u: interval=%u iterations=%u",
3295 num, scan_plan->interval, scan_plan->iterations);
3296 }
3297
3298 if (!scan_plans) {
3299 wpa_printf(MSG_ERROR, "Invalid scan plans entry");
3300 goto fail;
3301 }
3302
3303 if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) {
3304 wpa_printf(MSG_ERROR,
3305 "All scan plans but the last must specify a number of iterations");
3306 goto fail;
3307 }
3308
3309 wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u",
3310 num, scan_plans[num - 1].interval);
3311
3312 if (num > wpa_s->max_sched_scan_plans) {
3313 wpa_printf(MSG_WARNING,
3314 "Too many scheduled scan plans (only %u supported)",
3315 wpa_s->max_sched_scan_plans);
3316 wpa_printf(MSG_WARNING,
3317 "Use only the first %u scan plans, and the last one (in infinite loop)",
3318 wpa_s->max_sched_scan_plans - 1);
3319 os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1],
3320 &scan_plans[num - 1], sizeof(*scan_plans));
3321 num = wpa_s->max_sched_scan_plans;
3322 }
3323
3324 os_free(wpa_s->sched_scan_plans);
3325 wpa_s->sched_scan_plans = scan_plans;
3326 wpa_s->sched_scan_plans_num = num;
3327
3328 return 0;
3329
3330 fail:
3331 os_free(scan_plans);
3332 wpa_printf(MSG_ERROR, "invalid scan plans list");
3333 return -1;
3334 }
3335
3336
3337 /**
3338 * wpas_scan_reset_sched_scan - Reset sched_scan state
3339 * @wpa_s: Pointer to wpa_supplicant data
3340 *
3341 * This function is used to cancel a running scheduled scan and to reset an
3342 * internal scan state to continue with a regular scan on the following
3343 * wpa_supplicant_req_scan() calls.
3344 */
wpas_scan_reset_sched_scan(struct wpa_supplicant * wpa_s)3345 void wpas_scan_reset_sched_scan(struct wpa_supplicant *wpa_s)
3346 {
3347 wpa_s->normal_scans = 0;
3348 if (wpa_s->sched_scanning) {
3349 wpa_s->sched_scan_timed_out = 0;
3350 wpa_s->prev_sched_ssid = NULL;
3351 wpa_supplicant_cancel_sched_scan(wpa_s);
3352 }
3353 }
3354
3355
wpas_scan_restart_sched_scan(struct wpa_supplicant * wpa_s)3356 void wpas_scan_restart_sched_scan(struct wpa_supplicant *wpa_s)
3357 {
3358 /* simulate timeout to restart the sched scan */
3359 wpa_s->sched_scan_timed_out = 1;
3360 wpa_s->prev_sched_ssid = NULL;
3361 wpa_supplicant_cancel_sched_scan(wpa_s);
3362 }
3363
