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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - Scanning | |
9ba9fa07 | 3 | * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi> |
6fc6879b JM |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * Alternatively, this software may be distributed under the terms of BSD | |
10 | * license. | |
11 | * | |
12 | * See README and COPYING for more details. | |
13 | */ | |
14 | ||
9ba9fa07 | 15 | #include "utils/includes.h" |
6fc6879b | 16 | |
9ba9fa07 JM |
17 | #include "utils/common.h" |
18 | #include "utils/eloop.h" | |
19 | #include "common/ieee802_11_defs.h" | |
6fc6879b JM |
20 | #include "config.h" |
21 | #include "wpa_supplicant_i.h" | |
2d5b792d | 22 | #include "driver_i.h" |
6fc6879b | 23 | #include "mlme.h" |
b01c18a8 | 24 | #include "wps_supplicant.h" |
0e65037c JM |
25 | #include "p2p_supplicant.h" |
26 | #include "p2p/p2p.h" | |
8bac466b | 27 | #include "notify.h" |
9ba9fa07 JM |
28 | #include "bss.h" |
29 | #include "scan.h" | |
6fc6879b JM |
30 | |
31 | ||
32 | static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) | |
33 | { | |
34 | struct wpa_ssid *ssid; | |
35 | union wpa_event_data data; | |
36 | ||
37 | ssid = wpa_supplicant_get_ssid(wpa_s); | |
38 | if (ssid == NULL) | |
39 | return; | |
40 | ||
8bac466b | 41 | if (wpa_s->current_ssid == NULL) { |
6fc6879b | 42 | wpa_s->current_ssid = ssid; |
8bac466b JM |
43 | if (wpa_s->current_ssid != NULL) |
44 | wpas_notify_network_changed(wpa_s); | |
45 | } | |
6fc6879b | 46 | wpa_supplicant_initiate_eapol(wpa_s); |
f049052b BG |
47 | wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " |
48 | "network - generating associated event"); | |
6fc6879b JM |
49 | os_memset(&data, 0, sizeof(data)); |
50 | wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); | |
51 | } | |
52 | ||
53 | ||
ad08c363 | 54 | #ifdef CONFIG_WPS |
5f738a21 | 55 | static int wpas_wps_in_use(struct wpa_supplicant *wpa_s, |
f90c86d4 | 56 | enum wps_request_type *req_type) |
ad08c363 JM |
57 | { |
58 | struct wpa_ssid *ssid; | |
59 | int wps = 0; | |
ad08c363 | 60 | |
5f738a21 | 61 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
ad08c363 JM |
62 | if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) |
63 | continue; | |
64 | ||
65 | wps = 1; | |
b01c18a8 | 66 | *req_type = wpas_wps_get_req_type(ssid); |
ad08c363 JM |
67 | if (!ssid->eap.phase1) |
68 | continue; | |
69 | ||
ad08c363 JM |
70 | if (os_strstr(ssid->eap.phase1, "pbc=1")) |
71 | return 2; | |
72 | } | |
73 | ||
5f738a21 LC |
74 | #ifdef CONFIG_P2P |
75 | wpa_s->wps->dev.p2p = 1; | |
76 | if (!wps) { | |
77 | wps = 1; | |
78 | *req_type = WPS_REQ_ENROLLEE_INFO; | |
79 | } | |
80 | #endif /* CONFIG_P2P */ | |
81 | ||
ad08c363 JM |
82 | return wps; |
83 | } | |
84 | #endif /* CONFIG_WPS */ | |
85 | ||
e76baaac | 86 | |
4f34d51a | 87 | int wpa_supplicant_enabled_networks(struct wpa_config *conf) |
e76baaac JM |
88 | { |
89 | struct wpa_ssid *ssid = conf->ssid; | |
5471c343 | 90 | int count = 0; |
e76baaac JM |
91 | while (ssid) { |
92 | if (!ssid->disabled) | |
5471c343 | 93 | count++; |
e76baaac JM |
94 | ssid = ssid->next; |
95 | } | |
5471c343 | 96 | return count; |
e76baaac JM |
97 | } |
98 | ||
99 | ||
100 | static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, | |
101 | struct wpa_ssid *ssid) | |
102 | { | |
103 | while (ssid) { | |
104 | if (!ssid->disabled) | |
105 | break; | |
106 | ssid = ssid->next; | |
107 | } | |
108 | ||
109 | /* ap_scan=2 mode - try to associate with each SSID. */ | |
110 | if (ssid == NULL) { | |
f049052b BG |
111 | wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " |
112 | "end of scan list - go back to beginning"); | |
ba2a573c | 113 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
114 | wpa_supplicant_req_scan(wpa_s, 0, 0); |
115 | return; | |
116 | } | |
117 | if (ssid->next) { | |
118 | /* Continue from the next SSID on the next attempt. */ | |
119 | wpa_s->prev_scan_ssid = ssid; | |
120 | } else { | |
121 | /* Start from the beginning of the SSID list. */ | |
ba2a573c | 122 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
123 | } |
124 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
125 | } | |
126 | ||
127 | ||
d3a98225 JM |
128 | static int int_array_len(const int *a) |
129 | { | |
130 | int i; | |
131 | for (i = 0; a && a[i]; i++) | |
132 | ; | |
133 | return i; | |
134 | } | |
135 | ||
136 | ||
137 | static void int_array_concat(int **res, const int *a) | |
138 | { | |
139 | int reslen, alen, i; | |
140 | int *n; | |
141 | ||
142 | reslen = int_array_len(*res); | |
143 | alen = int_array_len(a); | |
144 | ||
145 | n = os_realloc(*res, (reslen + alen + 1) * sizeof(int)); | |
146 | if (n == NULL) { | |
147 | os_free(*res); | |
148 | *res = NULL; | |
e6c0ebff | 149 | return; |
d3a98225 JM |
150 | } |
151 | for (i = 0; i <= alen; i++) | |
152 | n[reslen + i] = a[i]; | |
153 | *res = n; | |
154 | } | |
155 | ||
156 | ||
157 | static int freq_cmp(const void *a, const void *b) | |
158 | { | |
159 | int _a = *(int *) a; | |
160 | int _b = *(int *) b; | |
161 | ||
162 | if (_a == 0) | |
163 | return 1; | |
164 | if (_b == 0) | |
165 | return -1; | |
166 | return _a - _b; | |
167 | } | |
168 | ||
169 | ||
170 | static void int_array_sort_unique(int *a) | |
171 | { | |
172 | int alen; | |
173 | int i, j; | |
174 | ||
175 | if (a == NULL) | |
176 | return; | |
177 | ||
178 | alen = int_array_len(a); | |
179 | qsort(a, alen, sizeof(int), freq_cmp); | |
180 | ||
181 | i = 0; | |
182 | j = 1; | |
183 | while (a[i] && a[j]) { | |
184 | if (a[i] == a[j]) { | |
185 | j++; | |
186 | continue; | |
187 | } | |
188 | a[++i] = a[j++]; | |
189 | } | |
190 | if (a[i]) | |
191 | i++; | |
192 | a[i] = 0; | |
193 | } | |
194 | ||
195 | ||
60b94c98 JM |
196 | int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, |
197 | struct wpa_driver_scan_params *params) | |
198 | { | |
199 | int ret; | |
200 | ||
201 | wpa_supplicant_notify_scanning(wpa_s, 1); | |
202 | ||
d009a9da JM |
203 | if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) |
204 | ret = ieee80211_sta_req_scan(wpa_s, params); | |
205 | else | |
60b94c98 | 206 | ret = wpa_drv_scan(wpa_s, params); |
60b94c98 JM |
207 | |
208 | if (ret) { | |
209 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
210 | wpas_notify_scan_done(wpa_s, 0); | |
211 | } else | |
212 | wpa_s->scan_runs++; | |
213 | ||
214 | return ret; | |
215 | } | |
216 | ||
217 | ||
cbdf3507 LC |
218 | static void |
219 | wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
220 | { | |
221 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
222 | ||
223 | wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); | |
224 | ||
225 | wpa_s->sched_scan_timed_out = 1; | |
226 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
227 | } | |
228 | ||
229 | ||
230 | static int | |
231 | wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, | |
232 | struct wpa_driver_scan_params *params, | |
233 | int interval) | |
234 | { | |
235 | int ret; | |
236 | ||
237 | if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) | |
238 | return -1; | |
239 | ||
240 | wpa_supplicant_notify_scanning(wpa_s, 1); | |
241 | ret = wpa_drv_sched_scan(wpa_s, params, interval * 1000); | |
242 | if (ret) | |
243 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
244 | else | |
245 | wpa_s->sched_scanning = 1; | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
250 | ||
251 | static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) | |
252 | { | |
253 | int ret; | |
254 | ||
255 | ret = wpa_drv_stop_sched_scan(wpa_s); | |
256 | if (ret) { | |
257 | wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); | |
258 | /* TODO: what to do if stopping fails? */ | |
259 | return -1; | |
260 | } | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
265 | ||
3812464c JM |
266 | static struct wpa_driver_scan_filter * |
267 | wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) | |
268 | { | |
269 | struct wpa_driver_scan_filter *ssids; | |
270 | struct wpa_ssid *ssid; | |
271 | size_t count; | |
272 | ||
273 | *num_ssids = 0; | |
274 | if (!conf->filter_ssids) | |
275 | return NULL; | |
276 | ||
277 | for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { | |
278 | if (ssid->ssid && ssid->ssid_len) | |
279 | count++; | |
280 | } | |
281 | if (count == 0) | |
282 | return NULL; | |
283 | ssids = os_zalloc(count * sizeof(struct wpa_driver_scan_filter)); | |
284 | if (ssids == NULL) | |
285 | return NULL; | |
286 | ||
287 | for (ssid = conf->ssid; ssid; ssid = ssid->next) { | |
288 | if (!ssid->ssid || !ssid->ssid_len) | |
289 | continue; | |
290 | os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); | |
291 | ssids[*num_ssids].ssid_len = ssid->ssid_len; | |
292 | (*num_ssids)++; | |
293 | } | |
294 | ||
295 | return ssids; | |
296 | } | |
297 | ||
298 | ||
5f738a21 LC |
299 | static void wpa_supplicant_optimize_freqs( |
300 | struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) | |
301 | { | |
302 | #ifdef CONFIG_P2P | |
303 | if (params->freqs == NULL && wpa_s->p2p_in_provisioning && | |
304 | wpa_s->go_params) { | |
305 | /* Optimize provisioning state scan based on GO information */ | |
306 | if (wpa_s->p2p_in_provisioning < 5 && | |
307 | wpa_s->go_params->freq > 0) { | |
308 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " | |
309 | "preferred frequency %d MHz", | |
310 | wpa_s->go_params->freq); | |
311 | params->freqs = os_zalloc(2 * sizeof(int)); | |
312 | if (params->freqs) | |
313 | params->freqs[0] = wpa_s->go_params->freq; | |
314 | } else if (wpa_s->p2p_in_provisioning < 8 && | |
315 | wpa_s->go_params->freq_list[0]) { | |
316 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " | |
317 | "channels"); | |
318 | int_array_concat(¶ms->freqs, | |
319 | wpa_s->go_params->freq_list); | |
320 | if (params->freqs) | |
321 | int_array_sort_unique(params->freqs); | |
322 | } | |
323 | wpa_s->p2p_in_provisioning++; | |
324 | } | |
325 | #endif /* CONFIG_P2P */ | |
326 | ||
327 | #ifdef CONFIG_WPS | |
328 | if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { | |
329 | /* | |
330 | * Optimize post-provisioning scan based on channel used | |
331 | * during provisioning. | |
332 | */ | |
333 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " | |
334 | "that was used during provisioning", wpa_s->wps_freq); | |
335 | params->freqs = os_zalloc(2 * sizeof(int)); | |
336 | if (params->freqs) | |
337 | params->freqs[0] = wpa_s->wps_freq; | |
338 | wpa_s->after_wps--; | |
339 | } | |
340 | ||
341 | #endif /* CONFIG_WPS */ | |
342 | } | |
343 | ||
344 | ||
345 | static struct wpabuf * | |
346 | wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s, | |
347 | struct wpa_driver_scan_params *params) | |
6fc6879b | 348 | { |
ad08c363 | 349 | struct wpabuf *wps_ie = NULL; |
b01c18a8 | 350 | #ifdef CONFIG_WPS |
509a3972 | 351 | int wps = 0; |
f90c86d4 | 352 | enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; |
5f738a21 LC |
353 | |
354 | wps = wpas_wps_in_use(wpa_s, &req_type); | |
355 | ||
356 | if (wps) { | |
357 | wps_ie = wps_build_probe_req_ie(wps == 2, &wpa_s->wps->dev, | |
358 | wpa_s->wps->uuid, req_type, | |
359 | 0, NULL); | |
360 | if (wps_ie) { | |
361 | params->extra_ies = wpabuf_head(wps_ie); | |
362 | params->extra_ies_len = wpabuf_len(wps_ie); | |
363 | } | |
364 | } | |
365 | ||
366 | #ifdef CONFIG_P2P | |
367 | if (wps_ie) { | |
368 | size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); | |
369 | if (wpabuf_resize(&wps_ie, ielen) == 0) { | |
370 | wpas_p2p_scan_ie(wpa_s, wps_ie); | |
371 | params->extra_ies = wpabuf_head(wps_ie); | |
372 | params->extra_ies_len = wpabuf_len(wps_ie); | |
373 | } | |
374 | } | |
375 | #endif /* CONFIG_P2P */ | |
376 | ||
b01c18a8 | 377 | #endif /* CONFIG_WPS */ |
5f738a21 LC |
378 | |
379 | return wps_ie; | |
380 | } | |
381 | ||
382 | ||
383 | static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) | |
384 | { | |
385 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
386 | struct wpa_ssid *ssid; | |
387 | int scan_req = 0, ret; | |
388 | struct wpabuf *wps_ie; | |
e76baaac JM |
389 | struct wpa_driver_scan_params params; |
390 | size_t max_ssids; | |
207ef3fb | 391 | enum wpa_states prev_state; |
6fc6879b | 392 | |
8401a6b0 | 393 | if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { |
f049052b | 394 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); |
8401a6b0 JM |
395 | return; |
396 | } | |
397 | ||
3180d7a2 SO |
398 | if (wpa_s->disconnected && !wpa_s->scan_req) { |
399 | wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); | |
6fc6879b | 400 | return; |
3180d7a2 | 401 | } |
6fc6879b | 402 | |
e76baaac JM |
403 | if (!wpa_supplicant_enabled_networks(wpa_s->conf) && |
404 | !wpa_s->scan_req) { | |
f049052b | 405 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); |
6fc6879b JM |
406 | wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); |
407 | return; | |
408 | } | |
6fc6879b | 409 | |
c2a04078 JM |
410 | if (wpa_s->conf->ap_scan != 0 && |
411 | (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { | |
f049052b BG |
412 | wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " |
413 | "overriding ap_scan configuration"); | |
6fc6879b | 414 | wpa_s->conf->ap_scan = 0; |
8bac466b | 415 | wpas_notify_ap_scan_changed(wpa_s); |
6fc6879b JM |
416 | } |
417 | ||
418 | if (wpa_s->conf->ap_scan == 0) { | |
419 | wpa_supplicant_gen_assoc_event(wpa_s); | |
420 | return; | |
421 | } | |
422 | ||
303f60d3 JM |
423 | #ifdef CONFIG_P2P |
424 | if (wpas_p2p_in_progress(wpa_s)) { | |
425 | if (wpa_s->wpa_state == WPA_SCANNING) { | |
426 | wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan " | |
427 | "while P2P operation is in progress"); | |
428 | wpa_supplicant_req_scan(wpa_s, 5, 0); | |
429 | } else { | |
430 | wpa_dbg(wpa_s, MSG_DEBUG, "Do not request scan while " | |
431 | "P2P operation is in progress"); | |
432 | } | |
433 | return; | |
434 | } | |
435 | #endif /* CONFIG_P2P */ | |
436 | ||
c2a04078 JM |
437 | if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) || |
438 | wpa_s->conf->ap_scan == 2) | |
e76baaac JM |
439 | max_ssids = 1; |
440 | else { | |
441 | max_ssids = wpa_s->max_scan_ssids; | |
442 | if (max_ssids > WPAS_MAX_SCAN_SSIDS) | |
443 | max_ssids = WPAS_MAX_SCAN_SSIDS; | |
444 | } | |
445 | ||
e76baaac JM |
446 | scan_req = wpa_s->scan_req; |
447 | wpa_s->scan_req = 0; | |
448 | ||
449 | os_memset(¶ms, 0, sizeof(params)); | |
450 | ||
207ef3fb | 451 | prev_state = wpa_s->wpa_state; |
6fc6879b JM |
452 | if (wpa_s->wpa_state == WPA_DISCONNECTED || |
453 | wpa_s->wpa_state == WPA_INACTIVE) | |
454 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
455 | ||
7dcdcfd6 JM |
456 | if (scan_req != 2 && wpa_s->connect_without_scan) { |
457 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
458 | if (ssid == wpa_s->connect_without_scan) | |
459 | break; | |
460 | } | |
461 | wpa_s->connect_without_scan = NULL; | |
462 | if (ssid) { | |
463 | wpa_printf(MSG_DEBUG, "Start a pre-selected network " | |
464 | "without scan step"); | |
465 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
466 | return; | |
467 | } | |
468 | } | |
469 | ||
e76baaac | 470 | /* Find the starting point from which to continue scanning */ |
6fc6879b | 471 | ssid = wpa_s->conf->ssid; |
ba2a573c | 472 | if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { |
6fc6879b JM |
473 | while (ssid) { |
474 | if (ssid == wpa_s->prev_scan_ssid) { | |
475 | ssid = ssid->next; | |
476 | break; | |
477 | } | |
478 | ssid = ssid->next; | |
479 | } | |
480 | } | |
6fc6879b | 481 | |
7dcdcfd6 JM |
482 | if (scan_req != 2 && wpa_s->conf->ap_scan == 2) { |
483 | wpa_s->connect_without_scan = NULL; | |
e76baaac JM |
484 | wpa_supplicant_assoc_try(wpa_s, ssid); |
485 | return; | |
486 | } else if (wpa_s->conf->ap_scan == 2) { | |
6fc6879b | 487 | /* |
ba2a573c JM |
488 | * User-initiated scan request in ap_scan == 2; scan with |
489 | * wildcard SSID. | |
6fc6879b | 490 | */ |
e76baaac JM |
491 | ssid = NULL; |
492 | } else { | |
5be45e2e | 493 | struct wpa_ssid *start = ssid, *tssid; |
d3a98225 | 494 | int freqs_set = 0; |
e76baaac JM |
495 | if (ssid == NULL && max_ssids > 1) |
496 | ssid = wpa_s->conf->ssid; | |
497 | while (ssid) { | |
498 | if (!ssid->disabled && ssid->scan_ssid) { | |
499 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", | |
500 | ssid->ssid, ssid->ssid_len); | |
501 | params.ssids[params.num_ssids].ssid = | |
502 | ssid->ssid; | |
503 | params.ssids[params.num_ssids].ssid_len = | |
504 | ssid->ssid_len; | |
505 | params.num_ssids++; | |
506 | if (params.num_ssids + 1 >= max_ssids) | |
507 | break; | |
508 | } | |
509 | ssid = ssid->next; | |
510 | if (ssid == start) | |
511 | break; | |
512 | if (ssid == NULL && max_ssids > 1 && | |
513 | start != wpa_s->conf->ssid) | |
514 | ssid = wpa_s->conf->ssid; | |
6fc6879b | 515 | } |
d3a98225 | 516 | |
5be45e2e JM |
517 | for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) { |
518 | if (tssid->disabled) | |
d3a98225 | 519 | continue; |
5be45e2e | 520 | if ((params.freqs || !freqs_set) && tssid->scan_freq) { |
d3a98225 | 521 | int_array_concat(¶ms.freqs, |
5be45e2e | 522 | tssid->scan_freq); |
d3a98225 JM |
523 | } else { |
524 | os_free(params.freqs); | |
525 | params.freqs = NULL; | |
526 | } | |
527 | freqs_set = 1; | |
528 | } | |
529 | int_array_sort_unique(params.freqs); | |
6fc6879b JM |
530 | } |
531 | ||
6fc6879b | 532 | if (ssid) { |
6fc6879b | 533 | wpa_s->prev_scan_ssid = ssid; |
e76baaac | 534 | if (max_ssids > 1) { |
f049052b BG |
535 | wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " |
536 | "the scan request"); | |
ba2a573c | 537 | params.num_ssids++; |
e76baaac | 538 | } |
f049052b BG |
539 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for specific " |
540 | "SSID(s)"); | |
e76baaac | 541 | } else { |
ba2a573c | 542 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac | 543 | params.num_ssids++; |
f049052b BG |
544 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " |
545 | "SSID"); | |
6fc6879b JM |
546 | } |
547 | ||
5f738a21 LC |
548 | wpa_supplicant_optimize_freqs(wpa_s, ¶ms); |
549 | wps_ie = wpa_supplicant_extra_ies(wpa_s, ¶ms); | |
0e65037c | 550 | |
f47d639d | 551 | if (params.freqs == NULL && wpa_s->next_scan_freqs) { |
f049052b BG |
552 | wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " |
553 | "generated frequency list"); | |
f47d639d JM |
554 | params.freqs = wpa_s->next_scan_freqs; |
555 | } else | |
556 | os_free(wpa_s->next_scan_freqs); | |
557 | wpa_s->next_scan_freqs = NULL; | |
558 | ||
3812464c JM |
559 | params.filter_ssids = wpa_supplicant_build_filter_ssids( |
560 | wpa_s->conf, ¶ms.num_filter_ssids); | |
561 | ||
60b94c98 | 562 | ret = wpa_supplicant_trigger_scan(wpa_s, ¶ms); |
6fc6879b | 563 | |
ad08c363 | 564 | wpabuf_free(wps_ie); |
d3a98225 | 565 | os_free(params.freqs); |
3812464c | 566 | os_free(params.filter_ssids); |
ad08c363 | 567 | |
6fc6879b | 568 | if (ret) { |
f049052b | 569 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); |
207ef3fb JM |
570 | if (prev_state != wpa_s->wpa_state) |
571 | wpa_supplicant_set_state(wpa_s, prev_state); | |
1c4c9c50 | 572 | wpa_supplicant_req_scan(wpa_s, 1, 0); |
d902a9c1 | 573 | } |
6fc6879b JM |
574 | } |
575 | ||
576 | ||
577 | /** | |
578 | * wpa_supplicant_req_scan - Schedule a scan for neighboring access points | |
579 | * @wpa_s: Pointer to wpa_supplicant data | |
580 | * @sec: Number of seconds after which to scan | |
581 | * @usec: Number of microseconds after which to scan | |
582 | * | |
583 | * This function is used to schedule a scan for neighboring access points after | |
584 | * the specified time. | |
585 | */ | |
586 | void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) | |
587 | { | |
7e148849 DW |
588 | /* If there's at least one network that should be specifically scanned |
589 | * then don't cancel the scan and reschedule. Some drivers do | |
590 | * background scanning which generates frequent scan results, and that | |
591 | * causes the specific SSID scan to get continually pushed back and | |
592 | * never happen, which causes hidden APs to never get probe-scanned. | |
593 | */ | |
594 | if (eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL) && | |
595 | wpa_s->conf->ap_scan == 1) { | |
596 | struct wpa_ssid *ssid = wpa_s->conf->ssid; | |
597 | ||
598 | while (ssid) { | |
599 | if (!ssid->disabled && ssid->scan_ssid) | |
600 | break; | |
601 | ssid = ssid->next; | |
602 | } | |
603 | if (ssid) { | |
f049052b | 604 | wpa_dbg(wpa_s, MSG_DEBUG, "Not rescheduling scan to " |
7e148849 DW |
605 | "ensure that specific SSID scans occur"); |
606 | return; | |
607 | } | |
608 | } | |
609 | ||
f049052b | 610 | wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d sec %d usec", |
6fc6879b JM |
611 | sec, usec); |
612 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); | |
613 | eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); | |
614 | } | |
615 | ||
616 | ||
cbdf3507 LC |
617 | /** |
618 | * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan | |
619 | * @wpa_s: Pointer to wpa_supplicant data | |
620 | * | |
621 | * This function is used to schedule periodic scans for neighboring | |
622 | * access points repeating the scan continuously. | |
623 | */ | |
624 | int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) | |
625 | { | |
626 | struct wpa_driver_scan_params params; | |
627 | enum wpa_states prev_state; | |
628 | struct wpa_ssid *ssid; | |
629 | struct wpabuf *wps_ie = NULL; | |
630 | int ret; | |
631 | int use_wildcard = 0; | |
632 | unsigned int max_sched_scan_ssids; | |
633 | ||
634 | if (!wpa_s->sched_scan_supported) | |
635 | return -1; | |
636 | ||
637 | if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) | |
638 | max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; | |
639 | else | |
640 | max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; | |
641 | ||
642 | if (wpa_s->sched_scanning) | |
643 | return 0; | |
644 | ||
645 | os_memset(¶ms, 0, sizeof(params)); | |
646 | ||
647 | prev_state = wpa_s->wpa_state; | |
648 | if (wpa_s->wpa_state == WPA_DISCONNECTED || | |
649 | wpa_s->wpa_state == WPA_INACTIVE) | |
650 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
651 | ||
652 | /* Find the starting point from which to continue scanning */ | |
653 | ssid = wpa_s->conf->ssid; | |
654 | if (wpa_s->prev_sched_ssid) { | |
655 | while (ssid) { | |
656 | if (ssid == wpa_s->prev_sched_ssid) { | |
657 | ssid = ssid->next; | |
658 | break; | |
659 | } | |
660 | ssid = ssid->next; | |
661 | } | |
662 | } | |
663 | ||
664 | if (!ssid || !wpa_s->prev_sched_ssid) { | |
665 | wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); | |
666 | ||
667 | wpa_s->sched_scan_interval = 2; | |
668 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; | |
669 | wpa_s->first_sched_scan = 1; | |
670 | ssid = wpa_s->conf->ssid; | |
671 | wpa_s->prev_sched_ssid = ssid; | |
672 | } | |
673 | ||
674 | while (ssid) { | |
675 | if (ssid->disabled) { | |
676 | wpa_s->prev_sched_ssid = ssid; | |
677 | ssid = ssid->next; | |
678 | continue; | |
679 | } | |
680 | ||
681 | if (!ssid->scan_ssid) | |
682 | use_wildcard = 1; | |
683 | else { | |
684 | params.ssids[params.num_ssids].ssid = | |
685 | ssid->ssid; | |
686 | params.ssids[params.num_ssids].ssid_len = | |
687 | ssid->ssid_len; | |
688 | params.num_ssids++; | |
689 | if (params.num_ssids + 1 >= max_sched_scan_ssids) { | |
690 | wpa_s->prev_sched_ssid = ssid; | |
691 | break; | |
692 | } | |
693 | } | |
694 | wpa_s->prev_sched_ssid = ssid; | |
695 | ssid = ssid->next; | |
696 | } | |
697 | ||
698 | if (ssid || use_wildcard) { | |
699 | wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " | |
700 | "the sched scan request"); | |
701 | params.num_ssids++; | |
702 | } else { | |
703 | wpa_dbg(wpa_s, MSG_DEBUG, "ssid %p - list ended", ssid); | |
704 | } | |
705 | ||
706 | if (!params.num_ssids) | |
707 | return 0; | |
708 | ||
709 | if (wpa_s->wps) | |
710 | wps_ie = wpa_supplicant_extra_ies(wpa_s, ¶ms); | |
711 | ||
712 | wpa_dbg(wpa_s, MSG_DEBUG, | |
713 | "Starting sched scan: interval %d timeout %d", | |
714 | wpa_s->sched_scan_interval, wpa_s->sched_scan_timeout); | |
715 | ||
716 | ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms, | |
717 | wpa_s->sched_scan_interval); | |
718 | wpabuf_free(wps_ie); | |
719 | if (ret) { | |
720 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); | |
721 | if (prev_state != wpa_s->wpa_state) | |
722 | wpa_supplicant_set_state(wpa_s, prev_state); | |
723 | return ret; | |
724 | } | |
725 | ||
726 | /* If we have more SSIDs to scan, add a timeout so we scan them too */ | |
727 | if (ssid || !wpa_s->first_sched_scan) { | |
728 | wpa_s->sched_scan_timed_out = 0; | |
729 | eloop_register_timeout(wpa_s->sched_scan_timeout, 0, | |
730 | wpa_supplicant_sched_scan_timeout, | |
731 | wpa_s, NULL); | |
732 | wpa_s->first_sched_scan = 0; | |
733 | wpa_s->sched_scan_timeout /= 2; | |
734 | wpa_s->sched_scan_interval *= 2; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | ||
6fc6879b JM |
741 | /** |
742 | * wpa_supplicant_cancel_scan - Cancel a scheduled scan request | |
743 | * @wpa_s: Pointer to wpa_supplicant data | |
744 | * | |
745 | * This function is used to cancel a scan request scheduled with | |
746 | * wpa_supplicant_req_scan(). | |
747 | */ | |
748 | void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) | |
749 | { | |
f049052b | 750 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); |
6fc6879b JM |
751 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); |
752 | } | |
cb8564b1 DW |
753 | |
754 | ||
cbdf3507 LC |
755 | /** |
756 | * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans | |
757 | * @wpa_s: Pointer to wpa_supplicant data | |
758 | * | |
759 | * This function is used to stop a periodic scheduled scan. | |
760 | */ | |
761 | void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) | |
762 | { | |
763 | if (!wpa_s->sched_scanning) | |
764 | return; | |
765 | ||
766 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); | |
767 | eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); | |
768 | wpa_supplicant_stop_sched_scan(wpa_s); | |
769 | } | |
770 | ||
771 | ||
cb8564b1 DW |
772 | void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, |
773 | int scanning) | |
774 | { | |
775 | if (wpa_s->scanning != scanning) { | |
776 | wpa_s->scanning = scanning; | |
8bac466b | 777 | wpas_notify_scanning(wpa_s); |
cb8564b1 DW |
778 | } |
779 | } | |
780 | ||
9ba9fa07 JM |
781 | |
782 | static int wpa_scan_get_max_rate(const struct wpa_scan_res *res) | |
783 | { | |
784 | int rate = 0; | |
785 | const u8 *ie; | |
786 | int i; | |
787 | ||
788 | ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); | |
789 | for (i = 0; ie && i < ie[1]; i++) { | |
790 | if ((ie[i + 2] & 0x7f) > rate) | |
791 | rate = ie[i + 2] & 0x7f; | |
792 | } | |
793 | ||
794 | ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); | |
795 | for (i = 0; ie && i < ie[1]; i++) { | |
796 | if ((ie[i + 2] & 0x7f) > rate) | |
797 | rate = ie[i + 2] & 0x7f; | |
798 | } | |
799 | ||
800 | return rate; | |
801 | } | |
802 | ||
803 | ||
d1f9c410 JM |
804 | const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) |
805 | { | |
806 | const u8 *end, *pos; | |
807 | ||
808 | pos = (const u8 *) (res + 1); | |
809 | end = pos + res->ie_len; | |
810 | ||
811 | while (pos + 1 < end) { | |
812 | if (pos + 2 + pos[1] > end) | |
813 | break; | |
814 | if (pos[0] == ie) | |
815 | return pos; | |
816 | pos += 2 + pos[1]; | |
817 | } | |
818 | ||
819 | return NULL; | |
820 | } | |
821 | ||
822 | ||
9ba9fa07 JM |
823 | const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, |
824 | u32 vendor_type) | |
825 | { | |
826 | const u8 *end, *pos; | |
827 | ||
828 | pos = (const u8 *) (res + 1); | |
829 | end = pos + res->ie_len; | |
830 | ||
831 | while (pos + 1 < end) { | |
832 | if (pos + 2 + pos[1] > end) | |
833 | break; | |
834 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
835 | vendor_type == WPA_GET_BE32(&pos[2])) | |
836 | return pos; | |
837 | pos += 2 + pos[1]; | |
838 | } | |
839 | ||
840 | return NULL; | |
841 | } | |
842 | ||
843 | ||
844 | struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, | |
845 | u32 vendor_type) | |
846 | { | |
847 | struct wpabuf *buf; | |
848 | const u8 *end, *pos; | |
849 | ||
850 | buf = wpabuf_alloc(res->ie_len); | |
851 | if (buf == NULL) | |
852 | return NULL; | |
853 | ||
854 | pos = (const u8 *) (res + 1); | |
855 | end = pos + res->ie_len; | |
856 | ||
54f489be JM |
857 | while (pos + 1 < end) { |
858 | if (pos + 2 + pos[1] > end) | |
859 | break; | |
860 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
861 | vendor_type == WPA_GET_BE32(&pos[2])) | |
862 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
863 | pos += 2 + pos[1]; | |
864 | } | |
865 | ||
866 | if (wpabuf_len(buf) == 0) { | |
867 | wpabuf_free(buf); | |
868 | buf = NULL; | |
869 | } | |
870 | ||
871 | return buf; | |
872 | } | |
873 | ||
874 | ||
875 | struct wpabuf * wpa_scan_get_vendor_ie_multi_beacon( | |
876 | const struct wpa_scan_res *res, u32 vendor_type) | |
877 | { | |
878 | struct wpabuf *buf; | |
879 | const u8 *end, *pos; | |
880 | ||
881 | if (res->beacon_ie_len == 0) | |
882 | return NULL; | |
883 | buf = wpabuf_alloc(res->beacon_ie_len); | |
884 | if (buf == NULL) | |
885 | return NULL; | |
886 | ||
887 | pos = (const u8 *) (res + 1); | |
888 | pos += res->ie_len; | |
889 | end = pos + res->beacon_ie_len; | |
890 | ||
9ba9fa07 JM |
891 | while (pos + 1 < end) { |
892 | if (pos + 2 + pos[1] > end) | |
893 | break; | |
894 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
895 | vendor_type == WPA_GET_BE32(&pos[2])) | |
896 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
897 | pos += 2 + pos[1]; | |
898 | } | |
899 | ||
900 | if (wpabuf_len(buf) == 0) { | |
901 | wpabuf_free(buf); | |
902 | buf = NULL; | |
903 | } | |
904 | ||
905 | return buf; | |
906 | } | |
907 | ||
908 | ||
909 | /* Compare function for sorting scan results. Return >0 if @b is considered | |
910 | * better. */ | |
911 | static int wpa_scan_result_compar(const void *a, const void *b) | |
912 | { | |
913 | struct wpa_scan_res **_wa = (void *) a; | |
914 | struct wpa_scan_res **_wb = (void *) b; | |
915 | struct wpa_scan_res *wa = *_wa; | |
916 | struct wpa_scan_res *wb = *_wb; | |
917 | int wpa_a, wpa_b, maxrate_a, maxrate_b; | |
918 | ||
919 | /* WPA/WPA2 support preferred */ | |
920 | wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || | |
921 | wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; | |
922 | wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || | |
923 | wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; | |
924 | ||
925 | if (wpa_b && !wpa_a) | |
926 | return 1; | |
927 | if (!wpa_b && wpa_a) | |
928 | return -1; | |
929 | ||
930 | /* privacy support preferred */ | |
931 | if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && | |
932 | (wb->caps & IEEE80211_CAP_PRIVACY)) | |
933 | return 1; | |
934 | if ((wa->caps & IEEE80211_CAP_PRIVACY) && | |
935 | (wb->caps & IEEE80211_CAP_PRIVACY) == 0) | |
936 | return -1; | |
937 | ||
938 | /* best/max rate preferred if signal level close enough XXX */ | |
939 | if ((wa->level && wb->level && abs(wb->level - wa->level) < 5) || | |
940 | (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { | |
941 | maxrate_a = wpa_scan_get_max_rate(wa); | |
942 | maxrate_b = wpa_scan_get_max_rate(wb); | |
943 | if (maxrate_a != maxrate_b) | |
944 | return maxrate_b - maxrate_a; | |
945 | } | |
946 | ||
947 | /* use freq for channel preference */ | |
948 | ||
949 | /* all things being equal, use signal level; if signal levels are | |
950 | * identical, use quality values since some drivers may only report | |
951 | * that value and leave the signal level zero */ | |
952 | if (wb->level == wa->level) | |
953 | return wb->qual - wa->qual; | |
954 | return wb->level - wa->level; | |
955 | } | |
956 | ||
957 | ||
41e650ae JM |
958 | #ifdef CONFIG_WPS |
959 | /* Compare function for sorting scan results when searching a WPS AP for | |
960 | * provisioning. Return >0 if @b is considered better. */ | |
961 | static int wpa_scan_result_wps_compar(const void *a, const void *b) | |
962 | { | |
963 | struct wpa_scan_res **_wa = (void *) a; | |
964 | struct wpa_scan_res **_wb = (void *) b; | |
965 | struct wpa_scan_res *wa = *_wa; | |
966 | struct wpa_scan_res *wb = *_wb; | |
967 | int uses_wps_a, uses_wps_b; | |
968 | struct wpabuf *wps_a, *wps_b; | |
969 | int res; | |
970 | ||
971 | /* Optimization - check WPS IE existence before allocated memory and | |
972 | * doing full reassembly. */ | |
973 | uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; | |
974 | uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; | |
975 | if (uses_wps_a && !uses_wps_b) | |
976 | return -1; | |
977 | if (!uses_wps_a && uses_wps_b) | |
978 | return 1; | |
979 | ||
980 | if (uses_wps_a && uses_wps_b) { | |
981 | wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); | |
982 | wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); | |
983 | res = wps_ap_priority_compar(wps_a, wps_b); | |
984 | wpabuf_free(wps_a); | |
985 | wpabuf_free(wps_b); | |
986 | if (res) | |
987 | return res; | |
988 | } | |
989 | ||
990 | /* | |
991 | * Do not use current AP security policy as a sorting criteria during | |
992 | * WPS provisioning step since the AP may get reconfigured at the | |
993 | * completion of provisioning. | |
994 | */ | |
995 | ||
996 | /* all things being equal, use signal level; if signal levels are | |
997 | * identical, use quality values since some drivers may only report | |
998 | * that value and leave the signal level zero */ | |
999 | if (wb->level == wa->level) | |
1000 | return wb->qual - wa->qual; | |
1001 | return wb->level - wa->level; | |
1002 | } | |
1003 | #endif /* CONFIG_WPS */ | |
1004 | ||
1005 | ||
9ba9fa07 JM |
1006 | /** |
1007 | * wpa_supplicant_get_scan_results - Get scan results | |
1008 | * @wpa_s: Pointer to wpa_supplicant data | |
1009 | * @info: Information about what was scanned or %NULL if not available | |
1010 | * @new_scan: Whether a new scan was performed | |
1011 | * Returns: Scan results, %NULL on failure | |
1012 | * | |
1013 | * This function request the current scan results from the driver and updates | |
1014 | * the local BSS list wpa_s->bss. The caller is responsible for freeing the | |
1015 | * results with wpa_scan_results_free(). | |
1016 | */ | |
1017 | struct wpa_scan_results * | |
1018 | wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, | |
1019 | struct scan_info *info, int new_scan) | |
1020 | { | |
1021 | struct wpa_scan_results *scan_res; | |
1022 | size_t i; | |
41e650ae | 1023 | int (*compar)(const void *, const void *) = wpa_scan_result_compar; |
9ba9fa07 JM |
1024 | |
1025 | if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) | |
1026 | scan_res = ieee80211_sta_get_scan_results(wpa_s); | |
1027 | else | |
1028 | scan_res = wpa_drv_get_scan_results2(wpa_s); | |
1029 | if (scan_res == NULL) { | |
f049052b | 1030 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); |
9ba9fa07 JM |
1031 | return NULL; |
1032 | } | |
1033 | ||
41e650ae JM |
1034 | #ifdef CONFIG_WPS |
1035 | if (wpas_wps_in_progress(wpa_s)) { | |
f049052b BG |
1036 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " |
1037 | "provisioning rules"); | |
41e650ae JM |
1038 | compar = wpa_scan_result_wps_compar; |
1039 | } | |
1040 | #endif /* CONFIG_WPS */ | |
1041 | ||
9ba9fa07 | 1042 | qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *), |
41e650ae | 1043 | compar); |
9ba9fa07 JM |
1044 | |
1045 | wpa_bss_update_start(wpa_s); | |
1046 | for (i = 0; i < scan_res->num; i++) | |
1047 | wpa_bss_update_scan_res(wpa_s, scan_res->res[i]); | |
1048 | wpa_bss_update_end(wpa_s, info, new_scan); | |
1049 | ||
1050 | return scan_res; | |
1051 | } | |
1052 | ||
1053 | ||
1054 | int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) | |
1055 | { | |
1056 | struct wpa_scan_results *scan_res; | |
1057 | scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); | |
1058 | if (scan_res == NULL) | |
1059 | return -1; | |
1060 | wpa_scan_results_free(scan_res); | |
1061 | ||
1062 | return 0; | |
1063 | } | |
d1f9c410 JM |
1064 | |
1065 | ||
1066 | void wpa_scan_results_free(struct wpa_scan_results *res) | |
1067 | { | |
1068 | size_t i; | |
1069 | ||
1070 | if (res == NULL) | |
1071 | return; | |
1072 | ||
1073 | for (i = 0; i < res->num; i++) | |
1074 | os_free(res->res[i]); | |
1075 | os_free(res->res); | |
1076 | os_free(res); | |
1077 | } |