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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - Scanning | |
9ba9fa07 | 3 | * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
9ba9fa07 | 9 | #include "utils/includes.h" |
6fc6879b | 10 | |
9ba9fa07 JM |
11 | #include "utils/common.h" |
12 | #include "utils/eloop.h" | |
13 | #include "common/ieee802_11_defs.h" | |
6fc6879b JM |
14 | #include "config.h" |
15 | #include "wpa_supplicant_i.h" | |
2d5b792d | 16 | #include "driver_i.h" |
b01c18a8 | 17 | #include "wps_supplicant.h" |
0e65037c JM |
18 | #include "p2p_supplicant.h" |
19 | #include "p2p/p2p.h" | |
c923b8a5 | 20 | #include "hs20_supplicant.h" |
8bac466b | 21 | #include "notify.h" |
9ba9fa07 JM |
22 | #include "bss.h" |
23 | #include "scan.h" | |
6fc6879b JM |
24 | |
25 | ||
26 | static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) | |
27 | { | |
28 | struct wpa_ssid *ssid; | |
29 | union wpa_event_data data; | |
30 | ||
31 | ssid = wpa_supplicant_get_ssid(wpa_s); | |
32 | if (ssid == NULL) | |
33 | return; | |
34 | ||
8bac466b | 35 | if (wpa_s->current_ssid == NULL) { |
6fc6879b | 36 | wpa_s->current_ssid = ssid; |
8bac466b JM |
37 | if (wpa_s->current_ssid != NULL) |
38 | wpas_notify_network_changed(wpa_s); | |
39 | } | |
6fc6879b | 40 | wpa_supplicant_initiate_eapol(wpa_s); |
f049052b BG |
41 | wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " |
42 | "network - generating associated event"); | |
6fc6879b JM |
43 | os_memset(&data, 0, sizeof(data)); |
44 | wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); | |
45 | } | |
46 | ||
47 | ||
ad08c363 | 48 | #ifdef CONFIG_WPS |
5f738a21 | 49 | static int wpas_wps_in_use(struct wpa_supplicant *wpa_s, |
f90c86d4 | 50 | enum wps_request_type *req_type) |
ad08c363 JM |
51 | { |
52 | struct wpa_ssid *ssid; | |
53 | int wps = 0; | |
ad08c363 | 54 | |
5f738a21 | 55 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
ad08c363 JM |
56 | if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) |
57 | continue; | |
58 | ||
59 | wps = 1; | |
b01c18a8 | 60 | *req_type = wpas_wps_get_req_type(ssid); |
ad08c363 JM |
61 | if (!ssid->eap.phase1) |
62 | continue; | |
63 | ||
ad08c363 JM |
64 | if (os_strstr(ssid->eap.phase1, "pbc=1")) |
65 | return 2; | |
66 | } | |
67 | ||
5f738a21 | 68 | #ifdef CONFIG_P2P |
7a808c7e JM |
69 | if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p && |
70 | !wpa_s->conf->p2p_disabled) { | |
b21ff9cb JM |
71 | wpa_s->wps->dev.p2p = 1; |
72 | if (!wps) { | |
73 | wps = 1; | |
74 | *req_type = WPS_REQ_ENROLLEE_INFO; | |
75 | } | |
5f738a21 LC |
76 | } |
77 | #endif /* CONFIG_P2P */ | |
78 | ||
ad08c363 JM |
79 | return wps; |
80 | } | |
81 | #endif /* CONFIG_WPS */ | |
82 | ||
e76baaac | 83 | |
349493bd | 84 | int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s) |
e76baaac | 85 | { |
349493bd | 86 | struct wpa_ssid *ssid = wpa_s->conf->ssid; |
d4534bde | 87 | int count = 0, disabled = 0; |
e76baaac | 88 | while (ssid) { |
349493bd | 89 | if (!wpas_network_disabled(wpa_s, ssid)) |
5471c343 | 90 | count++; |
d4534bde JM |
91 | else |
92 | disabled++; | |
e76baaac JM |
93 | ssid = ssid->next; |
94 | } | |
4d5bda5f JM |
95 | if (wpa_s->conf->cred && wpa_s->conf->interworking && |
96 | wpa_s->conf->auto_interworking) | |
97 | count++; | |
d4534bde JM |
98 | if (count == 0 && disabled > 0) { |
99 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled " | |
100 | "networks)", disabled); | |
101 | } | |
5471c343 | 102 | return count; |
e76baaac JM |
103 | } |
104 | ||
105 | ||
106 | static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, | |
107 | struct wpa_ssid *ssid) | |
108 | { | |
109 | while (ssid) { | |
349493bd | 110 | if (!wpas_network_disabled(wpa_s, ssid)) |
e76baaac JM |
111 | break; |
112 | ssid = ssid->next; | |
113 | } | |
114 | ||
115 | /* ap_scan=2 mode - try to associate with each SSID. */ | |
116 | if (ssid == NULL) { | |
f049052b BG |
117 | wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " |
118 | "end of scan list - go back to beginning"); | |
ba2a573c | 119 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
120 | wpa_supplicant_req_scan(wpa_s, 0, 0); |
121 | return; | |
122 | } | |
123 | if (ssid->next) { | |
124 | /* Continue from the next SSID on the next attempt. */ | |
125 | wpa_s->prev_scan_ssid = ssid; | |
126 | } else { | |
127 | /* Start from the beginning of the SSID list. */ | |
ba2a573c | 128 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
129 | } |
130 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
131 | } | |
132 | ||
133 | ||
d3a98225 JM |
134 | static int int_array_len(const int *a) |
135 | { | |
136 | int i; | |
137 | for (i = 0; a && a[i]; i++) | |
138 | ; | |
139 | return i; | |
140 | } | |
141 | ||
142 | ||
143 | static void int_array_concat(int **res, const int *a) | |
144 | { | |
145 | int reslen, alen, i; | |
146 | int *n; | |
147 | ||
148 | reslen = int_array_len(*res); | |
149 | alen = int_array_len(a); | |
150 | ||
067ffa26 | 151 | n = os_realloc_array(*res, reslen + alen + 1, sizeof(int)); |
d3a98225 JM |
152 | if (n == NULL) { |
153 | os_free(*res); | |
154 | *res = NULL; | |
e6c0ebff | 155 | return; |
d3a98225 JM |
156 | } |
157 | for (i = 0; i <= alen; i++) | |
158 | n[reslen + i] = a[i]; | |
159 | *res = n; | |
160 | } | |
161 | ||
162 | ||
163 | static int freq_cmp(const void *a, const void *b) | |
164 | { | |
165 | int _a = *(int *) a; | |
166 | int _b = *(int *) b; | |
167 | ||
168 | if (_a == 0) | |
169 | return 1; | |
170 | if (_b == 0) | |
171 | return -1; | |
172 | return _a - _b; | |
173 | } | |
174 | ||
175 | ||
176 | static void int_array_sort_unique(int *a) | |
177 | { | |
178 | int alen; | |
179 | int i, j; | |
180 | ||
181 | if (a == NULL) | |
182 | return; | |
183 | ||
184 | alen = int_array_len(a); | |
185 | qsort(a, alen, sizeof(int), freq_cmp); | |
186 | ||
187 | i = 0; | |
188 | j = 1; | |
189 | while (a[i] && a[j]) { | |
190 | if (a[i] == a[j]) { | |
191 | j++; | |
192 | continue; | |
193 | } | |
194 | a[++i] = a[j++]; | |
195 | } | |
196 | if (a[i]) | |
197 | i++; | |
198 | a[i] = 0; | |
199 | } | |
200 | ||
201 | ||
60b94c98 JM |
202 | int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, |
203 | struct wpa_driver_scan_params *params) | |
204 | { | |
205 | int ret; | |
206 | ||
207 | wpa_supplicant_notify_scanning(wpa_s, 1); | |
208 | ||
17fbb751 | 209 | ret = wpa_drv_scan(wpa_s, params); |
60b94c98 JM |
210 | if (ret) { |
211 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
212 | wpas_notify_scan_done(wpa_s, 0); | |
0b7a25c0 | 213 | } else { |
60b94c98 | 214 | wpa_s->scan_runs++; |
0b7a25c0 JM |
215 | wpa_s->normal_scans++; |
216 | } | |
60b94c98 JM |
217 | |
218 | return ret; | |
219 | } | |
220 | ||
221 | ||
6a90053c LC |
222 | static void |
223 | wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
224 | { | |
225 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
226 | ||
227 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan"); | |
228 | ||
229 | if (wpa_supplicant_req_sched_scan(wpa_s)) | |
230 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
231 | } | |
232 | ||
233 | ||
cbdf3507 LC |
234 | static void |
235 | wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
236 | { | |
237 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
238 | ||
239 | wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); | |
240 | ||
241 | wpa_s->sched_scan_timed_out = 1; | |
242 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
243 | } | |
244 | ||
245 | ||
246 | static int | |
247 | wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, | |
248 | struct wpa_driver_scan_params *params, | |
249 | int interval) | |
250 | { | |
251 | int ret; | |
252 | ||
cbdf3507 LC |
253 | wpa_supplicant_notify_scanning(wpa_s, 1); |
254 | ret = wpa_drv_sched_scan(wpa_s, params, interval * 1000); | |
255 | if (ret) | |
256 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
257 | else | |
258 | wpa_s->sched_scanning = 1; | |
259 | ||
260 | return ret; | |
261 | } | |
262 | ||
263 | ||
264 | static int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) | |
265 | { | |
266 | int ret; | |
267 | ||
268 | ret = wpa_drv_stop_sched_scan(wpa_s); | |
269 | if (ret) { | |
270 | wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); | |
271 | /* TODO: what to do if stopping fails? */ | |
272 | return -1; | |
273 | } | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
278 | ||
3812464c JM |
279 | static struct wpa_driver_scan_filter * |
280 | wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) | |
281 | { | |
282 | struct wpa_driver_scan_filter *ssids; | |
283 | struct wpa_ssid *ssid; | |
284 | size_t count; | |
285 | ||
286 | *num_ssids = 0; | |
287 | if (!conf->filter_ssids) | |
288 | return NULL; | |
289 | ||
290 | for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { | |
291 | if (ssid->ssid && ssid->ssid_len) | |
292 | count++; | |
293 | } | |
294 | if (count == 0) | |
295 | return NULL; | |
296 | ssids = os_zalloc(count * sizeof(struct wpa_driver_scan_filter)); | |
297 | if (ssids == NULL) | |
298 | return NULL; | |
299 | ||
300 | for (ssid = conf->ssid; ssid; ssid = ssid->next) { | |
301 | if (!ssid->ssid || !ssid->ssid_len) | |
302 | continue; | |
303 | os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); | |
304 | ssids[*num_ssids].ssid_len = ssid->ssid_len; | |
305 | (*num_ssids)++; | |
306 | } | |
307 | ||
308 | return ssids; | |
309 | } | |
310 | ||
311 | ||
5f738a21 LC |
312 | static void wpa_supplicant_optimize_freqs( |
313 | struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) | |
314 | { | |
315 | #ifdef CONFIG_P2P | |
316 | if (params->freqs == NULL && wpa_s->p2p_in_provisioning && | |
317 | wpa_s->go_params) { | |
318 | /* Optimize provisioning state scan based on GO information */ | |
319 | if (wpa_s->p2p_in_provisioning < 5 && | |
320 | wpa_s->go_params->freq > 0) { | |
321 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " | |
322 | "preferred frequency %d MHz", | |
323 | wpa_s->go_params->freq); | |
324 | params->freqs = os_zalloc(2 * sizeof(int)); | |
325 | if (params->freqs) | |
326 | params->freqs[0] = wpa_s->go_params->freq; | |
327 | } else if (wpa_s->p2p_in_provisioning < 8 && | |
328 | wpa_s->go_params->freq_list[0]) { | |
329 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " | |
330 | "channels"); | |
331 | int_array_concat(¶ms->freqs, | |
332 | wpa_s->go_params->freq_list); | |
333 | if (params->freqs) | |
334 | int_array_sort_unique(params->freqs); | |
335 | } | |
336 | wpa_s->p2p_in_provisioning++; | |
337 | } | |
338 | #endif /* CONFIG_P2P */ | |
339 | ||
340 | #ifdef CONFIG_WPS | |
341 | if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { | |
342 | /* | |
343 | * Optimize post-provisioning scan based on channel used | |
344 | * during provisioning. | |
345 | */ | |
346 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " | |
347 | "that was used during provisioning", wpa_s->wps_freq); | |
348 | params->freqs = os_zalloc(2 * sizeof(int)); | |
349 | if (params->freqs) | |
350 | params->freqs[0] = wpa_s->wps_freq; | |
351 | wpa_s->after_wps--; | |
352 | } | |
353 | ||
1e7fb4f1 JM |
354 | if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq) |
355 | { | |
356 | /* Optimize provisioning scan based on already known channel */ | |
357 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz", | |
358 | wpa_s->wps_freq); | |
359 | params->freqs = os_zalloc(2 * sizeof(int)); | |
360 | if (params->freqs) | |
361 | params->freqs[0] = wpa_s->wps_freq; | |
362 | wpa_s->known_wps_freq = 0; /* only do this once */ | |
363 | } | |
5f738a21 LC |
364 | #endif /* CONFIG_WPS */ |
365 | } | |
366 | ||
367 | ||
46ee0427 JM |
368 | #ifdef CONFIG_INTERWORKING |
369 | static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s, | |
370 | struct wpabuf *buf) | |
371 | { | |
372 | if (wpa_s->conf->interworking == 0) | |
373 | return; | |
374 | ||
375 | wpabuf_put_u8(buf, WLAN_EID_EXT_CAPAB); | |
376 | wpabuf_put_u8(buf, 4); | |
377 | wpabuf_put_u8(buf, 0x00); | |
378 | wpabuf_put_u8(buf, 0x00); | |
379 | wpabuf_put_u8(buf, 0x00); | |
380 | wpabuf_put_u8(buf, 0x80); /* Bit 31 - Interworking */ | |
381 | ||
382 | wpabuf_put_u8(buf, WLAN_EID_INTERWORKING); | |
383 | wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 : | |
384 | 1 + ETH_ALEN); | |
11540c0b | 385 | wpabuf_put_u8(buf, wpa_s->conf->access_network_type); |
46ee0427 JM |
386 | /* No Venue Info */ |
387 | if (!is_zero_ether_addr(wpa_s->conf->hessid)) | |
388 | wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN); | |
389 | } | |
390 | #endif /* CONFIG_INTERWORKING */ | |
391 | ||
392 | ||
a13e07ec | 393 | static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s) |
6fc6879b | 394 | { |
46ee0427 | 395 | struct wpabuf *extra_ie = NULL; |
b01c18a8 | 396 | #ifdef CONFIG_WPS |
509a3972 | 397 | int wps = 0; |
f90c86d4 | 398 | enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; |
46ee0427 JM |
399 | #endif /* CONFIG_WPS */ |
400 | ||
401 | #ifdef CONFIG_INTERWORKING | |
402 | if (wpa_s->conf->interworking && | |
403 | wpabuf_resize(&extra_ie, 100) == 0) | |
404 | wpas_add_interworking_elements(wpa_s, extra_ie); | |
405 | #endif /* CONFIG_INTERWORKING */ | |
5f738a21 | 406 | |
46ee0427 | 407 | #ifdef CONFIG_WPS |
5f738a21 LC |
408 | wps = wpas_wps_in_use(wpa_s, &req_type); |
409 | ||
410 | if (wps) { | |
46ee0427 | 411 | struct wpabuf *wps_ie; |
360182ed JM |
412 | wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON : |
413 | DEV_PW_DEFAULT, | |
414 | &wpa_s->wps->dev, | |
5f738a21 LC |
415 | wpa_s->wps->uuid, req_type, |
416 | 0, NULL); | |
417 | if (wps_ie) { | |
46ee0427 JM |
418 | if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0) |
419 | wpabuf_put_buf(extra_ie, wps_ie); | |
420 | wpabuf_free(wps_ie); | |
5f738a21 LC |
421 | } |
422 | } | |
423 | ||
424 | #ifdef CONFIG_P2P | |
46ee0427 | 425 | if (wps) { |
5f738a21 | 426 | size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); |
46ee0427 JM |
427 | if (wpabuf_resize(&extra_ie, ielen) == 0) |
428 | wpas_p2p_scan_ie(wpa_s, extra_ie); | |
5f738a21 LC |
429 | } |
430 | #endif /* CONFIG_P2P */ | |
431 | ||
b01c18a8 | 432 | #endif /* CONFIG_WPS */ |
5f738a21 | 433 | |
46ee0427 | 434 | return extra_ie; |
5f738a21 LC |
435 | } |
436 | ||
437 | ||
5cc70322 JM |
438 | #ifdef CONFIG_P2P |
439 | ||
440 | /* | |
441 | * Check whether there are any enabled networks or credentials that could be | |
442 | * used for a non-P2P connection. | |
443 | */ | |
444 | static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s) | |
445 | { | |
446 | struct wpa_ssid *ssid; | |
447 | ||
448 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
449 | if (wpas_network_disabled(wpa_s, ssid)) | |
450 | continue; | |
451 | if (!ssid->p2p_group) | |
452 | return 1; | |
453 | } | |
454 | ||
455 | if (wpa_s->conf->cred && wpa_s->conf->interworking && | |
456 | wpa_s->conf->auto_interworking) | |
457 | return 1; | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | ||
463 | /* | |
464 | * Find the operating frequency of any other virtual interface that is using | |
465 | * the same radio concurrently. | |
466 | */ | |
467 | static int shared_vif_oper_freq(struct wpa_supplicant *wpa_s) | |
468 | { | |
469 | const char *rn, *rn2; | |
470 | struct wpa_supplicant *ifs; | |
471 | u8 bssid[ETH_ALEN]; | |
472 | ||
473 | if (!wpa_s->driver->get_radio_name) | |
474 | return -1; | |
475 | ||
476 | rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv); | |
477 | if (rn == NULL || rn[0] == '\0') | |
478 | return -1; | |
479 | ||
480 | for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) { | |
481 | if (ifs == wpa_s || !ifs->driver->get_radio_name) | |
482 | continue; | |
483 | ||
484 | rn2 = ifs->driver->get_radio_name(ifs->drv_priv); | |
485 | if (!rn2 || os_strcmp(rn, rn2) != 0) | |
486 | continue; | |
487 | ||
488 | if (ifs->current_ssid == NULL || ifs->assoc_freq == 0) | |
489 | continue; | |
490 | ||
491 | if (ifs->current_ssid->mode == WPAS_MODE_AP || | |
492 | ifs->current_ssid->mode == WPAS_MODE_P2P_GO) | |
493 | return ifs->current_ssid->frequency; | |
494 | if (wpa_drv_get_bssid(ifs, bssid) == 0) | |
495 | return ifs->assoc_freq; | |
496 | } | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | #endif /* CONFIG_P2P */ | |
502 | ||
503 | ||
5f738a21 LC |
504 | static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) |
505 | { | |
506 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
507 | struct wpa_ssid *ssid; | |
4115303b JM |
508 | enum scan_req_type scan_req = NORMAL_SCAN_REQ; |
509 | int ret; | |
b9b12d02 | 510 | struct wpabuf *extra_ie = NULL; |
e76baaac | 511 | struct wpa_driver_scan_params params; |
7c865c68 | 512 | struct wpa_driver_scan_params *scan_params; |
e76baaac | 513 | size_t max_ssids; |
207ef3fb | 514 | enum wpa_states prev_state; |
6fc6879b | 515 | |
8401a6b0 | 516 | if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { |
f049052b | 517 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); |
8401a6b0 JM |
518 | return; |
519 | } | |
520 | ||
4115303b | 521 | if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) { |
ac06fb12 | 522 | wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan"); |
3180d7a2 | 523 | wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); |
6fc6879b | 524 | return; |
3180d7a2 | 525 | } |
6fc6879b | 526 | |
349493bd | 527 | if (!wpa_supplicant_enabled_networks(wpa_s) && |
4115303b | 528 | wpa_s->scan_req == NORMAL_SCAN_REQ) { |
f049052b | 529 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); |
6fc6879b | 530 | wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); |
4c490780 JM |
531 | #ifdef CONFIG_P2P |
532 | wpa_s->sta_scan_pending = 0; | |
533 | #endif /* CONFIG_P2P */ | |
6fc6879b JM |
534 | return; |
535 | } | |
6fc6879b | 536 | |
c2a04078 JM |
537 | if (wpa_s->conf->ap_scan != 0 && |
538 | (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { | |
f049052b BG |
539 | wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " |
540 | "overriding ap_scan configuration"); | |
6fc6879b | 541 | wpa_s->conf->ap_scan = 0; |
8bac466b | 542 | wpas_notify_ap_scan_changed(wpa_s); |
6fc6879b JM |
543 | } |
544 | ||
545 | if (wpa_s->conf->ap_scan == 0) { | |
546 | wpa_supplicant_gen_assoc_event(wpa_s); | |
547 | return; | |
548 | } | |
549 | ||
303f60d3 JM |
550 | #ifdef CONFIG_P2P |
551 | if (wpas_p2p_in_progress(wpa_s)) { | |
99fcd404 JM |
552 | if (wpa_s->sta_scan_pending && |
553 | wpas_p2p_in_progress(wpa_s) == 2 && | |
e665ca9a | 554 | wpa_s->global->p2p_cb_on_scan_complete) { |
99fcd404 JM |
555 | wpa_dbg(wpa_s, MSG_DEBUG, "Process pending station " |
556 | "mode scan during P2P search"); | |
557 | } else { | |
303f60d3 JM |
558 | wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan " |
559 | "while P2P operation is in progress"); | |
99fcd404 | 560 | wpa_s->sta_scan_pending = 1; |
303f60d3 | 561 | wpa_supplicant_req_scan(wpa_s, 5, 0); |
99fcd404 | 562 | return; |
303f60d3 | 563 | } |
303f60d3 JM |
564 | } |
565 | #endif /* CONFIG_P2P */ | |
566 | ||
17fbb751 | 567 | if (wpa_s->conf->ap_scan == 2) |
e76baaac JM |
568 | max_ssids = 1; |
569 | else { | |
570 | max_ssids = wpa_s->max_scan_ssids; | |
571 | if (max_ssids > WPAS_MAX_SCAN_SSIDS) | |
572 | max_ssids = WPAS_MAX_SCAN_SSIDS; | |
573 | } | |
574 | ||
e76baaac | 575 | scan_req = wpa_s->scan_req; |
4115303b | 576 | wpa_s->scan_req = NORMAL_SCAN_REQ; |
e76baaac JM |
577 | |
578 | os_memset(¶ms, 0, sizeof(params)); | |
579 | ||
207ef3fb | 580 | prev_state = wpa_s->wpa_state; |
6fc6879b JM |
581 | if (wpa_s->wpa_state == WPA_DISCONNECTED || |
582 | wpa_s->wpa_state == WPA_INACTIVE) | |
583 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
584 | ||
7c865c68 TB |
585 | /* |
586 | * If autoscan has set its own scanning parameters | |
587 | */ | |
588 | if (wpa_s->autoscan_params != NULL) { | |
589 | scan_params = wpa_s->autoscan_params; | |
590 | goto scan; | |
591 | } | |
592 | ||
4115303b | 593 | if (scan_req != MANUAL_SCAN_REQ && wpa_s->connect_without_scan) { |
7dcdcfd6 JM |
594 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
595 | if (ssid == wpa_s->connect_without_scan) | |
596 | break; | |
597 | } | |
598 | wpa_s->connect_without_scan = NULL; | |
599 | if (ssid) { | |
600 | wpa_printf(MSG_DEBUG, "Start a pre-selected network " | |
601 | "without scan step"); | |
602 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
603 | return; | |
604 | } | |
605 | } | |
606 | ||
a21c05db | 607 | #ifdef CONFIG_P2P |
85ea132a JM |
608 | if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) && |
609 | wpa_s->go_params) { | |
a21c05db | 610 | wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during " |
85ea132a | 611 | "P2P group formation"); |
a21c05db JM |
612 | params.ssids[0].ssid = wpa_s->go_params->ssid; |
613 | params.ssids[0].ssid_len = wpa_s->go_params->ssid_len; | |
614 | params.num_ssids = 1; | |
615 | goto ssid_list_set; | |
616 | } | |
617 | #endif /* CONFIG_P2P */ | |
618 | ||
e76baaac | 619 | /* Find the starting point from which to continue scanning */ |
6fc6879b | 620 | ssid = wpa_s->conf->ssid; |
ba2a573c | 621 | if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { |
6fc6879b JM |
622 | while (ssid) { |
623 | if (ssid == wpa_s->prev_scan_ssid) { | |
624 | ssid = ssid->next; | |
625 | break; | |
626 | } | |
627 | ssid = ssid->next; | |
628 | } | |
629 | } | |
6fc6879b | 630 | |
4115303b | 631 | if (scan_req != MANUAL_SCAN_REQ && wpa_s->conf->ap_scan == 2) { |
7dcdcfd6 | 632 | wpa_s->connect_without_scan = NULL; |
b3aa456b | 633 | wpa_s->prev_scan_wildcard = 0; |
e76baaac JM |
634 | wpa_supplicant_assoc_try(wpa_s, ssid); |
635 | return; | |
636 | } else if (wpa_s->conf->ap_scan == 2) { | |
6fc6879b | 637 | /* |
ba2a573c JM |
638 | * User-initiated scan request in ap_scan == 2; scan with |
639 | * wildcard SSID. | |
6fc6879b | 640 | */ |
e76baaac JM |
641 | ssid = NULL; |
642 | } else { | |
5be45e2e | 643 | struct wpa_ssid *start = ssid, *tssid; |
d3a98225 | 644 | int freqs_set = 0; |
e76baaac JM |
645 | if (ssid == NULL && max_ssids > 1) |
646 | ssid = wpa_s->conf->ssid; | |
647 | while (ssid) { | |
349493bd JM |
648 | if (!wpas_network_disabled(wpa_s, ssid) && |
649 | ssid->scan_ssid) { | |
e76baaac JM |
650 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", |
651 | ssid->ssid, ssid->ssid_len); | |
652 | params.ssids[params.num_ssids].ssid = | |
653 | ssid->ssid; | |
654 | params.ssids[params.num_ssids].ssid_len = | |
655 | ssid->ssid_len; | |
656 | params.num_ssids++; | |
657 | if (params.num_ssids + 1 >= max_ssids) | |
658 | break; | |
659 | } | |
660 | ssid = ssid->next; | |
661 | if (ssid == start) | |
662 | break; | |
663 | if (ssid == NULL && max_ssids > 1 && | |
664 | start != wpa_s->conf->ssid) | |
665 | ssid = wpa_s->conf->ssid; | |
6fc6879b | 666 | } |
d3a98225 | 667 | |
5be45e2e | 668 | for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) { |
349493bd | 669 | if (wpas_network_disabled(wpa_s, tssid)) |
d3a98225 | 670 | continue; |
5be45e2e | 671 | if ((params.freqs || !freqs_set) && tssid->scan_freq) { |
d3a98225 | 672 | int_array_concat(¶ms.freqs, |
5be45e2e | 673 | tssid->scan_freq); |
d3a98225 JM |
674 | } else { |
675 | os_free(params.freqs); | |
676 | params.freqs = NULL; | |
677 | } | |
678 | freqs_set = 1; | |
679 | } | |
680 | int_array_sort_unique(params.freqs); | |
6fc6879b JM |
681 | } |
682 | ||
b3aa456b ES |
683 | if (ssid && max_ssids == 1) { |
684 | /* | |
685 | * If the driver is limited to 1 SSID at a time interleave | |
686 | * wildcard SSID scans with specific SSID scans to avoid | |
687 | * waiting a long time for a wildcard scan. | |
688 | */ | |
689 | if (!wpa_s->prev_scan_wildcard) { | |
690 | params.ssids[0].ssid = NULL; | |
691 | params.ssids[0].ssid_len = 0; | |
692 | wpa_s->prev_scan_wildcard = 1; | |
693 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for " | |
694 | "wildcard SSID (Interleave with specific)"); | |
695 | } else { | |
696 | wpa_s->prev_scan_ssid = ssid; | |
697 | wpa_s->prev_scan_wildcard = 0; | |
698 | wpa_dbg(wpa_s, MSG_DEBUG, | |
699 | "Starting AP scan for specific SSID: %s", | |
700 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
e76baaac | 701 | } |
b3aa456b ES |
702 | } else if (ssid) { |
703 | /* max_ssids > 1 */ | |
704 | ||
705 | wpa_s->prev_scan_ssid = ssid; | |
706 | wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " | |
707 | "the scan request"); | |
708 | params.num_ssids++; | |
e76baaac | 709 | } else { |
ba2a573c | 710 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac | 711 | params.num_ssids++; |
f049052b BG |
712 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " |
713 | "SSID"); | |
6fc6879b | 714 | } |
a21c05db JM |
715 | #ifdef CONFIG_P2P |
716 | ssid_list_set: | |
717 | #endif /* CONFIG_P2P */ | |
6fc6879b | 718 | |
5f738a21 | 719 | wpa_supplicant_optimize_freqs(wpa_s, ¶ms); |
a13e07ec | 720 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
0e65037c | 721 | |
c923b8a5 JK |
722 | #ifdef CONFIG_HS20 |
723 | if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 6) == 0) | |
724 | wpas_hs20_add_indication(extra_ie); | |
725 | #endif /* CONFIG_HS20 */ | |
726 | ||
f47d639d | 727 | if (params.freqs == NULL && wpa_s->next_scan_freqs) { |
f049052b BG |
728 | wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " |
729 | "generated frequency list"); | |
f47d639d JM |
730 | params.freqs = wpa_s->next_scan_freqs; |
731 | } else | |
732 | os_free(wpa_s->next_scan_freqs); | |
733 | wpa_s->next_scan_freqs = NULL; | |
734 | ||
3812464c JM |
735 | params.filter_ssids = wpa_supplicant_build_filter_ssids( |
736 | wpa_s->conf, ¶ms.num_filter_ssids); | |
46ee0427 JM |
737 | if (extra_ie) { |
738 | params.extra_ies = wpabuf_head(extra_ie); | |
739 | params.extra_ies_len = wpabuf_len(extra_ie); | |
740 | } | |
3812464c | 741 | |
d1dd48e3 | 742 | #ifdef CONFIG_P2P |
85ea132a JM |
743 | if (wpa_s->p2p_in_provisioning || |
744 | (wpa_s->show_group_started && wpa_s->go_params)) { | |
d1dd48e3 JM |
745 | /* |
746 | * The interface may not yet be in P2P mode, so we have to | |
747 | * explicitly request P2P probe to disable CCK rates. | |
748 | */ | |
749 | params.p2p_probe = 1; | |
750 | } | |
751 | #endif /* CONFIG_P2P */ | |
752 | ||
7c865c68 TB |
753 | scan_params = ¶ms; |
754 | ||
755 | scan: | |
5cc70322 JM |
756 | #ifdef CONFIG_P2P |
757 | /* | |
758 | * If the driver does not support multi-channel concurrency and a | |
759 | * virtual interface that shares the same radio with the wpa_s interface | |
760 | * is operating there may not be need to scan other channels apart from | |
761 | * the current operating channel on the other virtual interface. Filter | |
762 | * out other channels in case we are trying to find a connection for a | |
763 | * station interface when we are not configured to prefer station | |
764 | * connection and a concurrent operation is already in process. | |
765 | */ | |
4115303b | 766 | if (wpa_s->scan_for_connection && scan_req == NORMAL_SCAN_REQ && |
5cc70322 JM |
767 | !scan_params->freqs && !params.freqs && |
768 | wpas_is_p2p_prioritized(wpa_s) && | |
769 | !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT) && | |
770 | wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && | |
771 | non_p2p_network_enabled(wpa_s)) { | |
772 | int freq = shared_vif_oper_freq(wpa_s); | |
773 | if (freq > 0) { | |
774 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only the current " | |
775 | "operating channel (%d MHz) since driver does " | |
776 | "not support multi-channel concurrency", freq); | |
777 | params.freqs = os_zalloc(sizeof(int) * 2); | |
778 | if (params.freqs) | |
779 | params.freqs[0] = freq; | |
780 | scan_params->freqs = params.freqs; | |
781 | } | |
782 | } | |
783 | #endif /* CONFIG_P2P */ | |
784 | ||
7c865c68 | 785 | ret = wpa_supplicant_trigger_scan(wpa_s, scan_params); |
6fc6879b | 786 | |
46ee0427 | 787 | wpabuf_free(extra_ie); |
d3a98225 | 788 | os_free(params.freqs); |
3812464c | 789 | os_free(params.filter_ssids); |
ad08c363 | 790 | |
6fc6879b | 791 | if (ret) { |
f049052b | 792 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); |
207ef3fb JM |
793 | if (prev_state != wpa_s->wpa_state) |
794 | wpa_supplicant_set_state(wpa_s, prev_state); | |
23270cd8 JM |
795 | /* Restore scan_req since we will try to scan again */ |
796 | wpa_s->scan_req = scan_req; | |
1c4c9c50 | 797 | wpa_supplicant_req_scan(wpa_s, 1, 0); |
5cc70322 JM |
798 | } else { |
799 | wpa_s->scan_for_connection = 0; | |
d902a9c1 | 800 | } |
6fc6879b JM |
801 | } |
802 | ||
803 | ||
804 | /** | |
805 | * wpa_supplicant_req_scan - Schedule a scan for neighboring access points | |
806 | * @wpa_s: Pointer to wpa_supplicant data | |
807 | * @sec: Number of seconds after which to scan | |
808 | * @usec: Number of microseconds after which to scan | |
809 | * | |
810 | * This function is used to schedule a scan for neighboring access points after | |
811 | * the specified time. | |
812 | */ | |
813 | void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) | |
814 | { | |
7e148849 DW |
815 | /* If there's at least one network that should be specifically scanned |
816 | * then don't cancel the scan and reschedule. Some drivers do | |
817 | * background scanning which generates frequent scan results, and that | |
818 | * causes the specific SSID scan to get continually pushed back and | |
819 | * never happen, which causes hidden APs to never get probe-scanned. | |
820 | */ | |
821 | if (eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL) && | |
822 | wpa_s->conf->ap_scan == 1) { | |
823 | struct wpa_ssid *ssid = wpa_s->conf->ssid; | |
824 | ||
825 | while (ssid) { | |
349493bd JM |
826 | if (!wpas_network_disabled(wpa_s, ssid) && |
827 | ssid->scan_ssid) | |
7e148849 DW |
828 | break; |
829 | ssid = ssid->next; | |
830 | } | |
831 | if (ssid) { | |
f049052b | 832 | wpa_dbg(wpa_s, MSG_DEBUG, "Not rescheduling scan to " |
7e148849 DW |
833 | "ensure that specific SSID scans occur"); |
834 | return; | |
835 | } | |
836 | } | |
837 | ||
f049052b | 838 | wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d sec %d usec", |
6fc6879b JM |
839 | sec, usec); |
840 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); | |
841 | eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); | |
842 | } | |
843 | ||
844 | ||
6a90053c LC |
845 | /** |
846 | * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan | |
847 | * @wpa_s: Pointer to wpa_supplicant data | |
848 | * @sec: Number of seconds after which to scan | |
849 | * @usec: Number of microseconds after which to scan | |
850 | * | |
851 | * This function is used to schedule periodic scans for neighboring | |
852 | * access points after the specified time. | |
853 | */ | |
854 | int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, | |
855 | int sec, int usec) | |
856 | { | |
857 | if (!wpa_s->sched_scan_supported) | |
858 | return -1; | |
859 | ||
860 | eloop_register_timeout(sec, usec, | |
861 | wpa_supplicant_delayed_sched_scan_timeout, | |
862 | wpa_s, NULL); | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | ||
cbdf3507 LC |
868 | /** |
869 | * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan | |
870 | * @wpa_s: Pointer to wpa_supplicant data | |
871 | * | |
872 | * This function is used to schedule periodic scans for neighboring | |
873 | * access points repeating the scan continuously. | |
874 | */ | |
875 | int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) | |
876 | { | |
877 | struct wpa_driver_scan_params params; | |
7c865c68 | 878 | struct wpa_driver_scan_params *scan_params; |
cbdf3507 | 879 | enum wpa_states prev_state; |
7c865c68 | 880 | struct wpa_ssid *ssid = NULL; |
a13e07ec | 881 | struct wpabuf *extra_ie = NULL; |
cbdf3507 | 882 | int ret; |
cbdf3507 | 883 | unsigned int max_sched_scan_ssids; |
76a5249e | 884 | int wildcard = 0; |
0b7a25c0 | 885 | int need_ssids; |
cbdf3507 LC |
886 | |
887 | if (!wpa_s->sched_scan_supported) | |
888 | return -1; | |
889 | ||
890 | if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) | |
891 | max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; | |
892 | else | |
893 | max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; | |
54ddd743 | 894 | if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload) |
76a5249e | 895 | return -1; |
cbdf3507 | 896 | |
1966e3d1 ES |
897 | if (wpa_s->sched_scanning) { |
898 | wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning"); | |
cbdf3507 | 899 | return 0; |
1966e3d1 | 900 | } |
cbdf3507 | 901 | |
0b7a25c0 JM |
902 | need_ssids = 0; |
903 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
349493bd | 904 | if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) { |
0b7a25c0 JM |
905 | /* Use wildcard SSID to find this network */ |
906 | wildcard = 1; | |
349493bd JM |
907 | } else if (!wpas_network_disabled(wpa_s, ssid) && |
908 | ssid->ssid_len) | |
0b7a25c0 | 909 | need_ssids++; |
aa283ddd JM |
910 | |
911 | #ifdef CONFIG_WPS | |
349493bd | 912 | if (!wpas_network_disabled(wpa_s, ssid) && |
fea7c3a0 | 913 | ssid->key_mgmt == WPA_KEY_MGMT_WPS) { |
aa283ddd JM |
914 | /* |
915 | * Normal scan is more reliable and faster for WPS | |
916 | * operations and since these are for short periods of | |
917 | * time, the benefit of trying to use sched_scan would | |
918 | * be limited. | |
919 | */ | |
920 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
921 | "sched_scan for WPS"); | |
922 | return -1; | |
923 | } | |
924 | #endif /* CONFIG_WPS */ | |
0b7a25c0 JM |
925 | } |
926 | if (wildcard) | |
927 | need_ssids++; | |
928 | ||
929 | if (wpa_s->normal_scans < 3 && | |
930 | (need_ssids <= wpa_s->max_scan_ssids || | |
931 | wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) { | |
932 | /* | |
933 | * When normal scan can speed up operations, use that for the | |
934 | * first operations before starting the sched_scan to allow | |
935 | * user space sleep more. We do this only if the normal scan | |
936 | * has functionality that is suitable for this or if the | |
937 | * sched_scan does not have better support for multiple SSIDs. | |
938 | */ | |
939 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
940 | "sched_scan for initial scans (normal_scans=%d)", | |
941 | wpa_s->normal_scans); | |
942 | return -1; | |
943 | } | |
944 | ||
cbdf3507 LC |
945 | os_memset(¶ms, 0, sizeof(params)); |
946 | ||
b59e6f26 LC |
947 | /* If we can't allocate space for the filters, we just don't filter */ |
948 | params.filter_ssids = os_zalloc(wpa_s->max_match_sets * | |
949 | sizeof(struct wpa_driver_scan_filter)); | |
950 | ||
cbdf3507 LC |
951 | prev_state = wpa_s->wpa_state; |
952 | if (wpa_s->wpa_state == WPA_DISCONNECTED || | |
953 | wpa_s->wpa_state == WPA_INACTIVE) | |
954 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
955 | ||
7c865c68 TB |
956 | if (wpa_s->autoscan_params != NULL) { |
957 | scan_params = wpa_s->autoscan_params; | |
958 | goto scan; | |
959 | } | |
960 | ||
cbdf3507 LC |
961 | /* Find the starting point from which to continue scanning */ |
962 | ssid = wpa_s->conf->ssid; | |
963 | if (wpa_s->prev_sched_ssid) { | |
964 | while (ssid) { | |
965 | if (ssid == wpa_s->prev_sched_ssid) { | |
966 | ssid = ssid->next; | |
967 | break; | |
968 | } | |
969 | ssid = ssid->next; | |
970 | } | |
971 | } | |
972 | ||
973 | if (!ssid || !wpa_s->prev_sched_ssid) { | |
974 | wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); | |
975 | ||
7c865c68 TB |
976 | if (wpa_s->sched_scan_interval == 0) |
977 | wpa_s->sched_scan_interval = 10; | |
cbdf3507 LC |
978 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; |
979 | wpa_s->first_sched_scan = 1; | |
980 | ssid = wpa_s->conf->ssid; | |
981 | wpa_s->prev_sched_ssid = ssid; | |
982 | } | |
983 | ||
76a5249e JM |
984 | if (wildcard) { |
985 | wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan"); | |
986 | params.num_ssids++; | |
987 | } | |
988 | ||
cbdf3507 | 989 | while (ssid) { |
349493bd | 990 | if (wpas_network_disabled(wpa_s, ssid)) |
5edddf41 | 991 | goto next; |
cbdf3507 | 992 | |
fcd16847 JM |
993 | if (params.num_filter_ssids < wpa_s->max_match_sets && |
994 | params.filter_ssids && ssid->ssid && ssid->ssid_len) { | |
1966e3d1 ES |
995 | wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s", |
996 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
b59e6f26 LC |
997 | os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid, |
998 | ssid->ssid, ssid->ssid_len); | |
999 | params.filter_ssids[params.num_filter_ssids].ssid_len = | |
1000 | ssid->ssid_len; | |
1001 | params.num_filter_ssids++; | |
86b47aaf JM |
1002 | } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len) |
1003 | { | |
1004 | wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID " | |
1005 | "filter for sched_scan - drop filter"); | |
1006 | os_free(params.filter_ssids); | |
1007 | params.filter_ssids = NULL; | |
1008 | params.num_filter_ssids = 0; | |
b59e6f26 LC |
1009 | } |
1010 | ||
3f56f3a4 | 1011 | if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) { |
76a5249e JM |
1012 | if (params.num_ssids == max_sched_scan_ssids) |
1013 | break; /* only room for broadcast SSID */ | |
3f56f3a4 JM |
1014 | wpa_dbg(wpa_s, MSG_DEBUG, |
1015 | "add to active scan ssid: %s", | |
1966e3d1 | 1016 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); |
cbdf3507 LC |
1017 | params.ssids[params.num_ssids].ssid = |
1018 | ssid->ssid; | |
1019 | params.ssids[params.num_ssids].ssid_len = | |
1020 | ssid->ssid_len; | |
1021 | params.num_ssids++; | |
b59e6f26 | 1022 | if (params.num_ssids >= max_sched_scan_ssids) { |
cbdf3507 | 1023 | wpa_s->prev_sched_ssid = ssid; |
b55aca46 JM |
1024 | do { |
1025 | ssid = ssid->next; | |
1026 | } while (ssid && | |
349493bd | 1027 | (wpas_network_disabled(wpa_s, ssid) || |
fea7c3a0 | 1028 | !ssid->scan_ssid)); |
cbdf3507 LC |
1029 | break; |
1030 | } | |
1031 | } | |
b59e6f26 | 1032 | |
5edddf41 | 1033 | next: |
cbdf3507 LC |
1034 | wpa_s->prev_sched_ssid = ssid; |
1035 | ssid = ssid->next; | |
1036 | } | |
1037 | ||
7c6a266c JM |
1038 | if (params.num_filter_ssids == 0) { |
1039 | os_free(params.filter_ssids); | |
1040 | params.filter_ssids = NULL; | |
1041 | } | |
1042 | ||
a13e07ec ES |
1043 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
1044 | if (extra_ie) { | |
1045 | params.extra_ies = wpabuf_head(extra_ie); | |
1046 | params.extra_ies_len = wpabuf_len(extra_ie); | |
1047 | } | |
cbdf3507 | 1048 | |
7c865c68 TB |
1049 | scan_params = ¶ms; |
1050 | ||
1051 | scan: | |
a8cb5a88 | 1052 | if (ssid || !wpa_s->first_sched_scan) { |
a8cb5a88 JM |
1053 | wpa_dbg(wpa_s, MSG_DEBUG, |
1054 | "Starting sched scan: interval %d timeout %d", | |
1055 | wpa_s->sched_scan_interval, wpa_s->sched_scan_timeout); | |
7d21a223 JM |
1056 | } else { |
1057 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1058 | "Starting sched scan: interval %d (no timeout)", | |
1059 | wpa_s->sched_scan_interval); | |
a8cb5a88 | 1060 | } |
cbdf3507 | 1061 | |
7c865c68 | 1062 | ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params, |
cbdf3507 | 1063 | wpa_s->sched_scan_interval); |
a13e07ec | 1064 | wpabuf_free(extra_ie); |
b59e6f26 | 1065 | os_free(params.filter_ssids); |
cbdf3507 LC |
1066 | if (ret) { |
1067 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); | |
1068 | if (prev_state != wpa_s->wpa_state) | |
1069 | wpa_supplicant_set_state(wpa_s, prev_state); | |
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | /* If we have more SSIDs to scan, add a timeout so we scan them too */ | |
1074 | if (ssid || !wpa_s->first_sched_scan) { | |
1075 | wpa_s->sched_scan_timed_out = 0; | |
1076 | eloop_register_timeout(wpa_s->sched_scan_timeout, 0, | |
1077 | wpa_supplicant_sched_scan_timeout, | |
1078 | wpa_s, NULL); | |
1079 | wpa_s->first_sched_scan = 0; | |
1080 | wpa_s->sched_scan_timeout /= 2; | |
1081 | wpa_s->sched_scan_interval *= 2; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | ||
6fc6879b JM |
1088 | /** |
1089 | * wpa_supplicant_cancel_scan - Cancel a scheduled scan request | |
1090 | * @wpa_s: Pointer to wpa_supplicant data | |
1091 | * | |
1092 | * This function is used to cancel a scan request scheduled with | |
1093 | * wpa_supplicant_req_scan(). | |
1094 | */ | |
1095 | void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) | |
1096 | { | |
f049052b | 1097 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); |
6fc6879b JM |
1098 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); |
1099 | } | |
cb8564b1 DW |
1100 | |
1101 | ||
cbdf3507 LC |
1102 | /** |
1103 | * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans | |
1104 | * @wpa_s: Pointer to wpa_supplicant data | |
1105 | * | |
1106 | * This function is used to stop a periodic scheduled scan. | |
1107 | */ | |
1108 | void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) | |
1109 | { | |
1110 | if (!wpa_s->sched_scanning) | |
1111 | return; | |
1112 | ||
1113 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); | |
1114 | eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); | |
1115 | wpa_supplicant_stop_sched_scan(wpa_s); | |
1116 | } | |
1117 | ||
1118 | ||
cb8564b1 DW |
1119 | void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, |
1120 | int scanning) | |
1121 | { | |
1122 | if (wpa_s->scanning != scanning) { | |
1123 | wpa_s->scanning = scanning; | |
8bac466b | 1124 | wpas_notify_scanning(wpa_s); |
cb8564b1 DW |
1125 | } |
1126 | } | |
1127 | ||
9ba9fa07 JM |
1128 | |
1129 | static int wpa_scan_get_max_rate(const struct wpa_scan_res *res) | |
1130 | { | |
1131 | int rate = 0; | |
1132 | const u8 *ie; | |
1133 | int i; | |
1134 | ||
1135 | ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); | |
1136 | for (i = 0; ie && i < ie[1]; i++) { | |
1137 | if ((ie[i + 2] & 0x7f) > rate) | |
1138 | rate = ie[i + 2] & 0x7f; | |
1139 | } | |
1140 | ||
1141 | ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); | |
1142 | for (i = 0; ie && i < ie[1]; i++) { | |
1143 | if ((ie[i + 2] & 0x7f) > rate) | |
1144 | rate = ie[i + 2] & 0x7f; | |
1145 | } | |
1146 | ||
1147 | return rate; | |
1148 | } | |
1149 | ||
1150 | ||
d1f9c410 JM |
1151 | const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) |
1152 | { | |
1153 | const u8 *end, *pos; | |
1154 | ||
1155 | pos = (const u8 *) (res + 1); | |
1156 | end = pos + res->ie_len; | |
1157 | ||
1158 | while (pos + 1 < end) { | |
1159 | if (pos + 2 + pos[1] > end) | |
1160 | break; | |
1161 | if (pos[0] == ie) | |
1162 | return pos; | |
1163 | pos += 2 + pos[1]; | |
1164 | } | |
1165 | ||
1166 | return NULL; | |
1167 | } | |
1168 | ||
1169 | ||
9ba9fa07 JM |
1170 | const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, |
1171 | u32 vendor_type) | |
1172 | { | |
1173 | const u8 *end, *pos; | |
1174 | ||
1175 | pos = (const u8 *) (res + 1); | |
1176 | end = pos + res->ie_len; | |
1177 | ||
1178 | while (pos + 1 < end) { | |
1179 | if (pos + 2 + pos[1] > end) | |
1180 | break; | |
1181 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1182 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1183 | return pos; | |
1184 | pos += 2 + pos[1]; | |
1185 | } | |
1186 | ||
1187 | return NULL; | |
1188 | } | |
1189 | ||
1190 | ||
1191 | struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, | |
1192 | u32 vendor_type) | |
1193 | { | |
1194 | struct wpabuf *buf; | |
1195 | const u8 *end, *pos; | |
1196 | ||
1197 | buf = wpabuf_alloc(res->ie_len); | |
1198 | if (buf == NULL) | |
1199 | return NULL; | |
1200 | ||
1201 | pos = (const u8 *) (res + 1); | |
1202 | end = pos + res->ie_len; | |
1203 | ||
54f489be JM |
1204 | while (pos + 1 < end) { |
1205 | if (pos + 2 + pos[1] > end) | |
1206 | break; | |
1207 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1208 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1209 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
1210 | pos += 2 + pos[1]; | |
1211 | } | |
1212 | ||
1213 | if (wpabuf_len(buf) == 0) { | |
1214 | wpabuf_free(buf); | |
1215 | buf = NULL; | |
1216 | } | |
1217 | ||
1218 | return buf; | |
1219 | } | |
1220 | ||
1221 | ||
1222 | struct wpabuf * wpa_scan_get_vendor_ie_multi_beacon( | |
1223 | const struct wpa_scan_res *res, u32 vendor_type) | |
1224 | { | |
1225 | struct wpabuf *buf; | |
1226 | const u8 *end, *pos; | |
1227 | ||
1228 | if (res->beacon_ie_len == 0) | |
1229 | return NULL; | |
1230 | buf = wpabuf_alloc(res->beacon_ie_len); | |
1231 | if (buf == NULL) | |
1232 | return NULL; | |
1233 | ||
1234 | pos = (const u8 *) (res + 1); | |
1235 | pos += res->ie_len; | |
1236 | end = pos + res->beacon_ie_len; | |
1237 | ||
9ba9fa07 JM |
1238 | while (pos + 1 < end) { |
1239 | if (pos + 2 + pos[1] > end) | |
1240 | break; | |
1241 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1242 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1243 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
1244 | pos += 2 + pos[1]; | |
1245 | } | |
1246 | ||
1247 | if (wpabuf_len(buf) == 0) { | |
1248 | wpabuf_free(buf); | |
1249 | buf = NULL; | |
1250 | } | |
1251 | ||
1252 | return buf; | |
1253 | } | |
1254 | ||
1255 | ||
577db0ae GM |
1256 | /* |
1257 | * Channels with a great SNR can operate at full rate. What is a great SNR? | |
1258 | * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general | |
1259 | * rule of thumb is that any SNR above 20 is good." This one | |
1260 | * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 | |
1261 | * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a | |
1262 | * conservative value. | |
1263 | */ | |
1264 | #define GREAT_SNR 30 | |
1265 | ||
9ba9fa07 JM |
1266 | /* Compare function for sorting scan results. Return >0 if @b is considered |
1267 | * better. */ | |
1268 | static int wpa_scan_result_compar(const void *a, const void *b) | |
1269 | { | |
577db0ae GM |
1270 | #define IS_5GHZ(n) (n > 4000) |
1271 | #define MIN(a,b) a < b ? a : b | |
9ba9fa07 JM |
1272 | struct wpa_scan_res **_wa = (void *) a; |
1273 | struct wpa_scan_res **_wb = (void *) b; | |
1274 | struct wpa_scan_res *wa = *_wa; | |
1275 | struct wpa_scan_res *wb = *_wb; | |
1276 | int wpa_a, wpa_b, maxrate_a, maxrate_b; | |
577db0ae | 1277 | int snr_a, snr_b; |
9ba9fa07 JM |
1278 | |
1279 | /* WPA/WPA2 support preferred */ | |
1280 | wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || | |
1281 | wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; | |
1282 | wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || | |
1283 | wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; | |
1284 | ||
1285 | if (wpa_b && !wpa_a) | |
1286 | return 1; | |
1287 | if (!wpa_b && wpa_a) | |
1288 | return -1; | |
1289 | ||
1290 | /* privacy support preferred */ | |
1291 | if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && | |
1292 | (wb->caps & IEEE80211_CAP_PRIVACY)) | |
1293 | return 1; | |
1294 | if ((wa->caps & IEEE80211_CAP_PRIVACY) && | |
1295 | (wb->caps & IEEE80211_CAP_PRIVACY) == 0) | |
1296 | return -1; | |
1297 | ||
577db0ae GM |
1298 | if ((wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) && |
1299 | !((wa->flags | wb->flags) & WPA_SCAN_NOISE_INVALID)) { | |
1300 | snr_a = MIN(wa->level - wa->noise, GREAT_SNR); | |
1301 | snr_b = MIN(wb->level - wb->noise, GREAT_SNR); | |
1302 | } else { | |
1303 | /* Not suitable information to calculate SNR, so use level */ | |
1304 | snr_a = wa->level; | |
1305 | snr_b = wb->level; | |
1306 | } | |
1307 | ||
577db0ae GM |
1308 | /* best/max rate preferred if SNR close enough */ |
1309 | if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) || | |
9ba9fa07 JM |
1310 | (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { |
1311 | maxrate_a = wpa_scan_get_max_rate(wa); | |
1312 | maxrate_b = wpa_scan_get_max_rate(wb); | |
1313 | if (maxrate_a != maxrate_b) | |
1314 | return maxrate_b - maxrate_a; | |
577db0ae GM |
1315 | if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq)) |
1316 | return IS_5GHZ(wa->freq) ? -1 : 1; | |
9ba9fa07 JM |
1317 | } |
1318 | ||
1319 | /* use freq for channel preference */ | |
1320 | ||
577db0ae | 1321 | /* all things being equal, use SNR; if SNRs are |
9ba9fa07 JM |
1322 | * identical, use quality values since some drivers may only report |
1323 | * that value and leave the signal level zero */ | |
577db0ae | 1324 | if (snr_b == snr_a) |
9ba9fa07 | 1325 | return wb->qual - wa->qual; |
577db0ae GM |
1326 | return snr_b - snr_a; |
1327 | #undef MIN | |
1328 | #undef IS_5GHZ | |
9ba9fa07 JM |
1329 | } |
1330 | ||
1331 | ||
41e650ae JM |
1332 | #ifdef CONFIG_WPS |
1333 | /* Compare function for sorting scan results when searching a WPS AP for | |
1334 | * provisioning. Return >0 if @b is considered better. */ | |
1335 | static int wpa_scan_result_wps_compar(const void *a, const void *b) | |
1336 | { | |
1337 | struct wpa_scan_res **_wa = (void *) a; | |
1338 | struct wpa_scan_res **_wb = (void *) b; | |
1339 | struct wpa_scan_res *wa = *_wa; | |
1340 | struct wpa_scan_res *wb = *_wb; | |
1341 | int uses_wps_a, uses_wps_b; | |
1342 | struct wpabuf *wps_a, *wps_b; | |
1343 | int res; | |
1344 | ||
1345 | /* Optimization - check WPS IE existence before allocated memory and | |
1346 | * doing full reassembly. */ | |
1347 | uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; | |
1348 | uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; | |
1349 | if (uses_wps_a && !uses_wps_b) | |
1350 | return -1; | |
1351 | if (!uses_wps_a && uses_wps_b) | |
1352 | return 1; | |
1353 | ||
1354 | if (uses_wps_a && uses_wps_b) { | |
1355 | wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); | |
1356 | wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); | |
1357 | res = wps_ap_priority_compar(wps_a, wps_b); | |
1358 | wpabuf_free(wps_a); | |
1359 | wpabuf_free(wps_b); | |
1360 | if (res) | |
1361 | return res; | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Do not use current AP security policy as a sorting criteria during | |
1366 | * WPS provisioning step since the AP may get reconfigured at the | |
1367 | * completion of provisioning. | |
1368 | */ | |
1369 | ||
1370 | /* all things being equal, use signal level; if signal levels are | |
1371 | * identical, use quality values since some drivers may only report | |
1372 | * that value and leave the signal level zero */ | |
1373 | if (wb->level == wa->level) | |
1374 | return wb->qual - wa->qual; | |
1375 | return wb->level - wa->level; | |
1376 | } | |
1377 | #endif /* CONFIG_WPS */ | |
1378 | ||
1379 | ||
aa820e02 JM |
1380 | static void dump_scan_res(struct wpa_scan_results *scan_res) |
1381 | { | |
76202aed | 1382 | #ifndef CONFIG_NO_STDOUT_DEBUG |
aa820e02 JM |
1383 | size_t i; |
1384 | ||
1385 | if (scan_res->res == NULL || scan_res->num == 0) | |
1386 | return; | |
1387 | ||
1388 | wpa_printf(MSG_EXCESSIVE, "Sorted scan results"); | |
1389 | ||
1390 | for (i = 0; i < scan_res->num; i++) { | |
1391 | struct wpa_scan_res *r = scan_res->res[i]; | |
1cbe86e2 | 1392 | u8 *pos; |
aa820e02 JM |
1393 | if ((r->flags & (WPA_SCAN_LEVEL_DBM | WPA_SCAN_NOISE_INVALID)) |
1394 | == WPA_SCAN_LEVEL_DBM) { | |
1395 | int snr = r->level - r->noise; | |
1396 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " | |
1397 | "noise=%d level=%d snr=%d%s flags=0x%x", | |
1398 | MAC2STR(r->bssid), r->freq, r->qual, | |
1399 | r->noise, r->level, snr, | |
1400 | snr >= GREAT_SNR ? "*" : "", r->flags); | |
1401 | } else { | |
1402 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " | |
1403 | "noise=%d level=%d flags=0x%x", | |
1404 | MAC2STR(r->bssid), r->freq, r->qual, | |
1405 | r->noise, r->level, r->flags); | |
1406 | } | |
1cbe86e2 JM |
1407 | pos = (u8 *) (r + 1); |
1408 | if (r->ie_len) | |
1409 | wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len); | |
1410 | pos += r->ie_len; | |
1411 | if (r->beacon_ie_len) | |
1412 | wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs", | |
1413 | pos, r->beacon_ie_len); | |
aa820e02 | 1414 | } |
76202aed | 1415 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
aa820e02 JM |
1416 | } |
1417 | ||
1418 | ||
d445a5cd JM |
1419 | int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, |
1420 | const u8 *bssid) | |
1421 | { | |
1422 | size_t i; | |
1423 | ||
1424 | if (wpa_s->bssid_filter == NULL) | |
1425 | return 1; | |
1426 | ||
1427 | for (i = 0; i < wpa_s->bssid_filter_count; i++) { | |
1428 | if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid, | |
1429 | ETH_ALEN) == 0) | |
1430 | return 1; | |
1431 | } | |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | ||
1437 | static void filter_scan_res(struct wpa_supplicant *wpa_s, | |
1438 | struct wpa_scan_results *res) | |
1439 | { | |
1440 | size_t i, j; | |
1441 | ||
1442 | if (wpa_s->bssid_filter == NULL) | |
1443 | return; | |
1444 | ||
1445 | for (i = 0, j = 0; i < res->num; i++) { | |
1446 | if (wpa_supplicant_filter_bssid_match(wpa_s, | |
1447 | res->res[i]->bssid)) { | |
1448 | res->res[j++] = res->res[i]; | |
1449 | } else { | |
1450 | os_free(res->res[i]); | |
1451 | res->res[i] = NULL; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | if (res->num != j) { | |
1456 | wpa_printf(MSG_DEBUG, "Filtered out %d scan results", | |
1457 | (int) (res->num - j)); | |
1458 | res->num = j; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | ||
9ba9fa07 JM |
1463 | /** |
1464 | * wpa_supplicant_get_scan_results - Get scan results | |
1465 | * @wpa_s: Pointer to wpa_supplicant data | |
1466 | * @info: Information about what was scanned or %NULL if not available | |
1467 | * @new_scan: Whether a new scan was performed | |
1468 | * Returns: Scan results, %NULL on failure | |
1469 | * | |
1470 | * This function request the current scan results from the driver and updates | |
1471 | * the local BSS list wpa_s->bss. The caller is responsible for freeing the | |
1472 | * results with wpa_scan_results_free(). | |
1473 | */ | |
1474 | struct wpa_scan_results * | |
1475 | wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, | |
1476 | struct scan_info *info, int new_scan) | |
1477 | { | |
1478 | struct wpa_scan_results *scan_res; | |
1479 | size_t i; | |
41e650ae | 1480 | int (*compar)(const void *, const void *) = wpa_scan_result_compar; |
9ba9fa07 | 1481 | |
17fbb751 | 1482 | scan_res = wpa_drv_get_scan_results2(wpa_s); |
9ba9fa07 | 1483 | if (scan_res == NULL) { |
f049052b | 1484 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); |
9ba9fa07 JM |
1485 | return NULL; |
1486 | } | |
d445a5cd | 1487 | filter_scan_res(wpa_s, scan_res); |
9ba9fa07 | 1488 | |
41e650ae JM |
1489 | #ifdef CONFIG_WPS |
1490 | if (wpas_wps_in_progress(wpa_s)) { | |
f049052b BG |
1491 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " |
1492 | "provisioning rules"); | |
41e650ae JM |
1493 | compar = wpa_scan_result_wps_compar; |
1494 | } | |
1495 | #endif /* CONFIG_WPS */ | |
1496 | ||
9ba9fa07 | 1497 | qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *), |
41e650ae | 1498 | compar); |
aa820e02 | 1499 | dump_scan_res(scan_res); |
9ba9fa07 JM |
1500 | |
1501 | wpa_bss_update_start(wpa_s); | |
1502 | for (i = 0; i < scan_res->num; i++) | |
1503 | wpa_bss_update_scan_res(wpa_s, scan_res->res[i]); | |
1504 | wpa_bss_update_end(wpa_s, info, new_scan); | |
1505 | ||
1506 | return scan_res; | |
1507 | } | |
1508 | ||
1509 | ||
1510 | int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) | |
1511 | { | |
1512 | struct wpa_scan_results *scan_res; | |
1513 | scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); | |
1514 | if (scan_res == NULL) | |
1515 | return -1; | |
1516 | wpa_scan_results_free(scan_res); | |
1517 | ||
1518 | return 0; | |
1519 | } |