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Commit | Line | Data |
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6fc6879b JM |
1 | /* |
2 | * WPA Supplicant - Scanning | |
dd43aaa5 | 3 | * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi> |
6fc6879b | 4 | * |
0f3d578e JM |
5 | * This software may be distributed under the terms of the BSD license. |
6 | * See README for more details. | |
6fc6879b JM |
7 | */ |
8 | ||
9ba9fa07 | 9 | #include "utils/includes.h" |
6fc6879b | 10 | |
9ba9fa07 JM |
11 | #include "utils/common.h" |
12 | #include "utils/eloop.h" | |
13 | #include "common/ieee802_11_defs.h" | |
66fe0f70 | 14 | #include "common/wpa_ctrl.h" |
6fc6879b JM |
15 | #include "config.h" |
16 | #include "wpa_supplicant_i.h" | |
2d5b792d | 17 | #include "driver_i.h" |
b01c18a8 | 18 | #include "wps_supplicant.h" |
0e65037c JM |
19 | #include "p2p_supplicant.h" |
20 | #include "p2p/p2p.h" | |
c923b8a5 | 21 | #include "hs20_supplicant.h" |
8bac466b | 22 | #include "notify.h" |
9ba9fa07 JM |
23 | #include "bss.h" |
24 | #include "scan.h" | |
6fc6879b JM |
25 | |
26 | ||
27 | static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) | |
28 | { | |
29 | struct wpa_ssid *ssid; | |
30 | union wpa_event_data data; | |
31 | ||
32 | ssid = wpa_supplicant_get_ssid(wpa_s); | |
33 | if (ssid == NULL) | |
34 | return; | |
35 | ||
8bac466b | 36 | if (wpa_s->current_ssid == NULL) { |
6fc6879b | 37 | wpa_s->current_ssid = ssid; |
8bac466b JM |
38 | if (wpa_s->current_ssid != NULL) |
39 | wpas_notify_network_changed(wpa_s); | |
40 | } | |
6fc6879b | 41 | wpa_supplicant_initiate_eapol(wpa_s); |
f049052b BG |
42 | wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " |
43 | "network - generating associated event"); | |
6fc6879b JM |
44 | os_memset(&data, 0, sizeof(data)); |
45 | wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); | |
46 | } | |
47 | ||
48 | ||
ad08c363 | 49 | #ifdef CONFIG_WPS |
5f738a21 | 50 | static int wpas_wps_in_use(struct wpa_supplicant *wpa_s, |
f90c86d4 | 51 | enum wps_request_type *req_type) |
ad08c363 JM |
52 | { |
53 | struct wpa_ssid *ssid; | |
54 | int wps = 0; | |
ad08c363 | 55 | |
5f738a21 | 56 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
ad08c363 JM |
57 | if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) |
58 | continue; | |
59 | ||
60 | wps = 1; | |
b01c18a8 | 61 | *req_type = wpas_wps_get_req_type(ssid); |
ad08c363 JM |
62 | if (!ssid->eap.phase1) |
63 | continue; | |
64 | ||
ad08c363 JM |
65 | if (os_strstr(ssid->eap.phase1, "pbc=1")) |
66 | return 2; | |
67 | } | |
68 | ||
5f738a21 | 69 | #ifdef CONFIG_P2P |
7a808c7e JM |
70 | if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p && |
71 | !wpa_s->conf->p2p_disabled) { | |
b21ff9cb JM |
72 | wpa_s->wps->dev.p2p = 1; |
73 | if (!wps) { | |
74 | wps = 1; | |
75 | *req_type = WPS_REQ_ENROLLEE_INFO; | |
76 | } | |
5f738a21 LC |
77 | } |
78 | #endif /* CONFIG_P2P */ | |
79 | ||
ad08c363 JM |
80 | return wps; |
81 | } | |
82 | #endif /* CONFIG_WPS */ | |
83 | ||
e76baaac | 84 | |
2c09af30 JM |
85 | /** |
86 | * wpa_supplicant_enabled_networks - Check whether there are enabled networks | |
87 | * @wpa_s: Pointer to wpa_supplicant data | |
88 | * Returns: 0 if no networks are enabled, >0 if networks are enabled | |
89 | * | |
90 | * This function is used to figure out whether any networks (or Interworking | |
91 | * with enabled credentials and auto_interworking) are present in the current | |
92 | * configuration. | |
93 | */ | |
349493bd | 94 | int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s) |
e76baaac | 95 | { |
349493bd | 96 | struct wpa_ssid *ssid = wpa_s->conf->ssid; |
d4534bde | 97 | int count = 0, disabled = 0; |
e76baaac | 98 | while (ssid) { |
349493bd | 99 | if (!wpas_network_disabled(wpa_s, ssid)) |
5471c343 | 100 | count++; |
d4534bde JM |
101 | else |
102 | disabled++; | |
e76baaac JM |
103 | ssid = ssid->next; |
104 | } | |
4d5bda5f JM |
105 | if (wpa_s->conf->cred && wpa_s->conf->interworking && |
106 | wpa_s->conf->auto_interworking) | |
107 | count++; | |
d4534bde JM |
108 | if (count == 0 && disabled > 0) { |
109 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled " | |
110 | "networks)", disabled); | |
111 | } | |
5471c343 | 112 | return count; |
e76baaac JM |
113 | } |
114 | ||
115 | ||
116 | static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, | |
117 | struct wpa_ssid *ssid) | |
118 | { | |
119 | while (ssid) { | |
349493bd | 120 | if (!wpas_network_disabled(wpa_s, ssid)) |
e76baaac JM |
121 | break; |
122 | ssid = ssid->next; | |
123 | } | |
124 | ||
125 | /* ap_scan=2 mode - try to associate with each SSID. */ | |
126 | if (ssid == NULL) { | |
f049052b BG |
127 | wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " |
128 | "end of scan list - go back to beginning"); | |
ba2a573c | 129 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
130 | wpa_supplicant_req_scan(wpa_s, 0, 0); |
131 | return; | |
132 | } | |
133 | if (ssid->next) { | |
134 | /* Continue from the next SSID on the next attempt. */ | |
135 | wpa_s->prev_scan_ssid = ssid; | |
136 | } else { | |
137 | /* Start from the beginning of the SSID list. */ | |
ba2a573c | 138 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
139 | } |
140 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
141 | } | |
142 | ||
143 | ||
d12a51b5 | 144 | static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit) |
60b94c98 | 145 | { |
d12a51b5 JM |
146 | struct wpa_supplicant *wpa_s = work->wpa_s; |
147 | struct wpa_driver_scan_params *params = work->ctx; | |
60b94c98 JM |
148 | int ret; |
149 | ||
d12a51b5 | 150 | if (deinit) { |
b3253ebb AO |
151 | if (!work->started) { |
152 | wpa_scan_free_params(params); | |
153 | return; | |
154 | } | |
155 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
156 | wpas_notify_scan_done(wpa_s, 0); | |
157 | wpa_s->scan_work = NULL; | |
d12a51b5 JM |
158 | return; |
159 | } | |
160 | ||
60b94c98 JM |
161 | wpa_supplicant_notify_scanning(wpa_s, 1); |
162 | ||
949938aa JM |
163 | if (wpa_s->clear_driver_scan_cache) |
164 | params->only_new_results = 1; | |
17fbb751 | 165 | ret = wpa_drv_scan(wpa_s, params); |
d12a51b5 JM |
166 | wpa_scan_free_params(params); |
167 | work->ctx = NULL; | |
60b94c98 JM |
168 | if (ret) { |
169 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
170 | wpas_notify_scan_done(wpa_s, 0); | |
d12a51b5 JM |
171 | radio_work_done(work); |
172 | return; | |
0b7a25c0 | 173 | } |
60b94c98 | 174 | |
d12a51b5 JM |
175 | os_get_reltime(&wpa_s->scan_trigger_time); |
176 | wpa_s->scan_runs++; | |
177 | wpa_s->normal_scans++; | |
178 | wpa_s->own_scan_requested = 1; | |
179 | wpa_s->clear_driver_scan_cache = 0; | |
180 | wpa_s->scan_work = work; | |
181 | } | |
182 | ||
183 | ||
184 | /** | |
185 | * wpa_supplicant_trigger_scan - Request driver to start a scan | |
186 | * @wpa_s: Pointer to wpa_supplicant data | |
187 | * @params: Scan parameters | |
188 | * Returns: 0 on success, -1 on failure | |
189 | */ | |
190 | int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, | |
191 | struct wpa_driver_scan_params *params) | |
192 | { | |
193 | struct wpa_driver_scan_params *ctx; | |
194 | ||
195 | if (wpa_s->scan_work) { | |
196 | wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending"); | |
197 | return -1; | |
198 | } | |
199 | ||
200 | ctx = wpa_scan_clone_params(params); | |
201 | if (ctx == NULL) | |
202 | return -1; | |
203 | ||
204 | if (radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0) | |
205 | { | |
206 | wpa_scan_free_params(ctx); | |
207 | return -1; | |
208 | } | |
209 | ||
210 | return 0; | |
60b94c98 JM |
211 | } |
212 | ||
213 | ||
6a90053c LC |
214 | static void |
215 | wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
216 | { | |
217 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
218 | ||
219 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan"); | |
220 | ||
221 | if (wpa_supplicant_req_sched_scan(wpa_s)) | |
222 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
223 | } | |
224 | ||
225 | ||
cbdf3507 LC |
226 | static void |
227 | wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
228 | { | |
229 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
230 | ||
231 | wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); | |
232 | ||
233 | wpa_s->sched_scan_timed_out = 1; | |
234 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
235 | } | |
236 | ||
237 | ||
f86d282f JJ |
238 | int wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, |
239 | struct wpa_driver_scan_params *params, | |
240 | int interval) | |
cbdf3507 LC |
241 | { |
242 | int ret; | |
243 | ||
cbdf3507 LC |
244 | wpa_supplicant_notify_scanning(wpa_s, 1); |
245 | ret = wpa_drv_sched_scan(wpa_s, params, interval * 1000); | |
246 | if (ret) | |
247 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
248 | else | |
249 | wpa_s->sched_scanning = 1; | |
250 | ||
251 | return ret; | |
252 | } | |
253 | ||
254 | ||
f86d282f | 255 | int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) |
cbdf3507 LC |
256 | { |
257 | int ret; | |
258 | ||
259 | ret = wpa_drv_stop_sched_scan(wpa_s); | |
260 | if (ret) { | |
261 | wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); | |
262 | /* TODO: what to do if stopping fails? */ | |
263 | return -1; | |
264 | } | |
265 | ||
266 | return ret; | |
267 | } | |
268 | ||
269 | ||
3812464c JM |
270 | static struct wpa_driver_scan_filter * |
271 | wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) | |
272 | { | |
273 | struct wpa_driver_scan_filter *ssids; | |
274 | struct wpa_ssid *ssid; | |
275 | size_t count; | |
276 | ||
277 | *num_ssids = 0; | |
278 | if (!conf->filter_ssids) | |
279 | return NULL; | |
280 | ||
281 | for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { | |
282 | if (ssid->ssid && ssid->ssid_len) | |
283 | count++; | |
284 | } | |
285 | if (count == 0) | |
286 | return NULL; | |
287 | ssids = os_zalloc(count * sizeof(struct wpa_driver_scan_filter)); | |
288 | if (ssids == NULL) | |
289 | return NULL; | |
290 | ||
291 | for (ssid = conf->ssid; ssid; ssid = ssid->next) { | |
292 | if (!ssid->ssid || !ssid->ssid_len) | |
293 | continue; | |
294 | os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); | |
295 | ssids[*num_ssids].ssid_len = ssid->ssid_len; | |
296 | (*num_ssids)++; | |
297 | } | |
298 | ||
299 | return ssids; | |
300 | } | |
301 | ||
302 | ||
5f738a21 LC |
303 | static void wpa_supplicant_optimize_freqs( |
304 | struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) | |
305 | { | |
306 | #ifdef CONFIG_P2P | |
307 | if (params->freqs == NULL && wpa_s->p2p_in_provisioning && | |
308 | wpa_s->go_params) { | |
309 | /* Optimize provisioning state scan based on GO information */ | |
310 | if (wpa_s->p2p_in_provisioning < 5 && | |
311 | wpa_s->go_params->freq > 0) { | |
312 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " | |
313 | "preferred frequency %d MHz", | |
314 | wpa_s->go_params->freq); | |
315 | params->freqs = os_zalloc(2 * sizeof(int)); | |
316 | if (params->freqs) | |
317 | params->freqs[0] = wpa_s->go_params->freq; | |
318 | } else if (wpa_s->p2p_in_provisioning < 8 && | |
319 | wpa_s->go_params->freq_list[0]) { | |
320 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " | |
321 | "channels"); | |
322 | int_array_concat(¶ms->freqs, | |
323 | wpa_s->go_params->freq_list); | |
324 | if (params->freqs) | |
325 | int_array_sort_unique(params->freqs); | |
326 | } | |
327 | wpa_s->p2p_in_provisioning++; | |
328 | } | |
41d5ce9e RR |
329 | |
330 | if (params->freqs == NULL && wpa_s->p2p_in_invitation) { | |
331 | /* | |
332 | * Optimize scan based on GO information during persistent | |
333 | * group reinvocation | |
334 | */ | |
28fa4eb2 | 335 | if (wpa_s->p2p_in_invitation < 5 && |
41d5ce9e RR |
336 | wpa_s->p2p_invite_go_freq > 0) { |
337 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation", | |
338 | wpa_s->p2p_invite_go_freq); | |
339 | params->freqs = os_zalloc(2 * sizeof(int)); | |
340 | if (params->freqs) | |
341 | params->freqs[0] = wpa_s->p2p_invite_go_freq; | |
342 | } | |
343 | wpa_s->p2p_in_invitation++; | |
344 | if (wpa_s->p2p_in_invitation > 20) { | |
345 | /* | |
346 | * This should not really happen since the variable is | |
347 | * cleared on group removal, but if it does happen, make | |
348 | * sure we do not get stuck in special invitation scan | |
349 | * mode. | |
350 | */ | |
351 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation"); | |
352 | wpa_s->p2p_in_invitation = 0; | |
353 | } | |
354 | } | |
5f738a21 LC |
355 | #endif /* CONFIG_P2P */ |
356 | ||
357 | #ifdef CONFIG_WPS | |
358 | if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { | |
359 | /* | |
360 | * Optimize post-provisioning scan based on channel used | |
361 | * during provisioning. | |
362 | */ | |
363 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " | |
364 | "that was used during provisioning", wpa_s->wps_freq); | |
365 | params->freqs = os_zalloc(2 * sizeof(int)); | |
366 | if (params->freqs) | |
367 | params->freqs[0] = wpa_s->wps_freq; | |
368 | wpa_s->after_wps--; | |
662b40b1 JM |
369 | } else if (wpa_s->after_wps) |
370 | wpa_s->after_wps--; | |
5f738a21 | 371 | |
1e7fb4f1 JM |
372 | if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq) |
373 | { | |
374 | /* Optimize provisioning scan based on already known channel */ | |
375 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz", | |
376 | wpa_s->wps_freq); | |
377 | params->freqs = os_zalloc(2 * sizeof(int)); | |
378 | if (params->freqs) | |
379 | params->freqs[0] = wpa_s->wps_freq; | |
380 | wpa_s->known_wps_freq = 0; /* only do this once */ | |
381 | } | |
5f738a21 LC |
382 | #endif /* CONFIG_WPS */ |
383 | } | |
384 | ||
385 | ||
46ee0427 JM |
386 | #ifdef CONFIG_INTERWORKING |
387 | static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s, | |
388 | struct wpabuf *buf) | |
389 | { | |
390 | if (wpa_s->conf->interworking == 0) | |
391 | return; | |
392 | ||
393 | wpabuf_put_u8(buf, WLAN_EID_EXT_CAPAB); | |
95a3ea94 | 394 | wpabuf_put_u8(buf, 6); |
46ee0427 JM |
395 | wpabuf_put_u8(buf, 0x00); |
396 | wpabuf_put_u8(buf, 0x00); | |
397 | wpabuf_put_u8(buf, 0x00); | |
398 | wpabuf_put_u8(buf, 0x80); /* Bit 31 - Interworking */ | |
95a3ea94 JM |
399 | wpabuf_put_u8(buf, 0x00); |
400 | #ifdef CONFIG_HS20 | |
401 | wpabuf_put_u8(buf, 0x40); /* Bit 46 - WNM-Notification */ | |
402 | #else /* CONFIG_HS20 */ | |
403 | wpabuf_put_u8(buf, 0x00); | |
404 | #endif /* CONFIG_HS20 */ | |
46ee0427 JM |
405 | |
406 | wpabuf_put_u8(buf, WLAN_EID_INTERWORKING); | |
407 | wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 : | |
408 | 1 + ETH_ALEN); | |
11540c0b | 409 | wpabuf_put_u8(buf, wpa_s->conf->access_network_type); |
46ee0427 JM |
410 | /* No Venue Info */ |
411 | if (!is_zero_ether_addr(wpa_s->conf->hessid)) | |
412 | wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN); | |
413 | } | |
414 | #endif /* CONFIG_INTERWORKING */ | |
415 | ||
416 | ||
a13e07ec | 417 | static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s) |
6fc6879b | 418 | { |
46ee0427 | 419 | struct wpabuf *extra_ie = NULL; |
b01c18a8 | 420 | #ifdef CONFIG_WPS |
509a3972 | 421 | int wps = 0; |
f90c86d4 | 422 | enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; |
46ee0427 JM |
423 | #endif /* CONFIG_WPS */ |
424 | ||
425 | #ifdef CONFIG_INTERWORKING | |
426 | if (wpa_s->conf->interworking && | |
427 | wpabuf_resize(&extra_ie, 100) == 0) | |
428 | wpas_add_interworking_elements(wpa_s, extra_ie); | |
429 | #endif /* CONFIG_INTERWORKING */ | |
5f738a21 | 430 | |
46ee0427 | 431 | #ifdef CONFIG_WPS |
5f738a21 LC |
432 | wps = wpas_wps_in_use(wpa_s, &req_type); |
433 | ||
434 | if (wps) { | |
46ee0427 | 435 | struct wpabuf *wps_ie; |
360182ed JM |
436 | wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON : |
437 | DEV_PW_DEFAULT, | |
438 | &wpa_s->wps->dev, | |
5f738a21 LC |
439 | wpa_s->wps->uuid, req_type, |
440 | 0, NULL); | |
441 | if (wps_ie) { | |
46ee0427 JM |
442 | if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0) |
443 | wpabuf_put_buf(extra_ie, wps_ie); | |
444 | wpabuf_free(wps_ie); | |
5f738a21 LC |
445 | } |
446 | } | |
447 | ||
448 | #ifdef CONFIG_P2P | |
46ee0427 | 449 | if (wps) { |
5f738a21 | 450 | size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); |
46ee0427 JM |
451 | if (wpabuf_resize(&extra_ie, ielen) == 0) |
452 | wpas_p2p_scan_ie(wpa_s, extra_ie); | |
5f738a21 LC |
453 | } |
454 | #endif /* CONFIG_P2P */ | |
455 | ||
b01c18a8 | 456 | #endif /* CONFIG_WPS */ |
5f738a21 | 457 | |
0f105f9e JM |
458 | #ifdef CONFIG_HS20 |
459 | if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0) | |
f9cd147d | 460 | wpas_hs20_add_indication(extra_ie, -1); |
0f105f9e JM |
461 | #endif /* CONFIG_HS20 */ |
462 | ||
46ee0427 | 463 | return extra_ie; |
5f738a21 LC |
464 | } |
465 | ||
466 | ||
5cc70322 JM |
467 | #ifdef CONFIG_P2P |
468 | ||
469 | /* | |
470 | * Check whether there are any enabled networks or credentials that could be | |
471 | * used for a non-P2P connection. | |
472 | */ | |
473 | static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s) | |
474 | { | |
475 | struct wpa_ssid *ssid; | |
476 | ||
477 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
478 | if (wpas_network_disabled(wpa_s, ssid)) | |
479 | continue; | |
480 | if (!ssid->p2p_group) | |
481 | return 1; | |
482 | } | |
483 | ||
484 | if (wpa_s->conf->cred && wpa_s->conf->interworking && | |
485 | wpa_s->conf->auto_interworking) | |
486 | return 1; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
6124e858 | 491 | #endif /* CONFIG_P2P */ |
5cc70322 | 492 | |
5cc70322 | 493 | |
faf9a858 JM |
494 | static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, |
495 | u16 num_modes, | |
496 | enum hostapd_hw_mode mode) | |
497 | { | |
498 | u16 i; | |
499 | ||
500 | for (i = 0; i < num_modes; i++) { | |
501 | if (modes[i].mode == mode) | |
502 | return &modes[i]; | |
503 | } | |
504 | ||
505 | return NULL; | |
506 | } | |
507 | ||
508 | ||
509 | static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, | |
510 | enum hostapd_hw_mode band, | |
511 | struct wpa_driver_scan_params *params) | |
512 | { | |
513 | /* Include only supported channels for the specified band */ | |
514 | struct hostapd_hw_modes *mode; | |
515 | int count, i; | |
516 | ||
517 | mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); | |
518 | if (mode == NULL) { | |
519 | /* No channels supported in this band - use empty list */ | |
520 | params->freqs = os_zalloc(sizeof(int)); | |
521 | return; | |
522 | } | |
523 | ||
524 | params->freqs = os_zalloc((mode->num_channels + 1) * sizeof(int)); | |
525 | if (params->freqs == NULL) | |
526 | return; | |
527 | for (count = 0, i = 0; i < mode->num_channels; i++) { | |
528 | if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) | |
529 | continue; | |
530 | params->freqs[count++] = mode->channels[i].freq; | |
531 | } | |
532 | } | |
533 | ||
534 | ||
535 | static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s, | |
536 | struct wpa_driver_scan_params *params) | |
537 | { | |
538 | if (wpa_s->hw.modes == NULL) | |
539 | return; /* unknown what channels the driver supports */ | |
540 | if (params->freqs) | |
541 | return; /* already using a limited channel set */ | |
542 | if (wpa_s->setband == WPA_SETBAND_5G) | |
543 | wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, | |
544 | params); | |
545 | else if (wpa_s->setband == WPA_SETBAND_2G) | |
546 | wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, | |
547 | params); | |
548 | } | |
549 | ||
550 | ||
6891f0e6 LJ |
551 | static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s, |
552 | struct wpa_driver_scan_params *params, | |
553 | size_t max_ssids) | |
554 | { | |
555 | unsigned int i; | |
556 | struct wpa_ssid *ssid; | |
557 | ||
558 | for (i = 0; i < wpa_s->scan_id_count; i++) { | |
559 | unsigned int j; | |
560 | ||
561 | ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]); | |
562 | if (!ssid || !ssid->scan_ssid) | |
563 | continue; | |
564 | ||
565 | for (j = 0; j < params->num_ssids; j++) { | |
566 | if (params->ssids[j].ssid_len == ssid->ssid_len && | |
567 | params->ssids[j].ssid && | |
568 | os_memcmp(params->ssids[j].ssid, ssid->ssid, | |
569 | ssid->ssid_len) == 0) | |
570 | break; | |
571 | } | |
572 | if (j < params->num_ssids) | |
573 | continue; /* already in the list */ | |
574 | ||
575 | if (params->num_ssids + 1 > max_ssids) { | |
576 | wpa_printf(MSG_DEBUG, | |
577 | "Over max scan SSIDs for manual request"); | |
578 | break; | |
579 | } | |
580 | ||
581 | wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s", | |
582 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
583 | params->ssids[params->num_ssids].ssid = ssid->ssid; | |
584 | params->ssids[params->num_ssids].ssid_len = ssid->ssid_len; | |
585 | params->num_ssids++; | |
586 | } | |
587 | ||
588 | wpa_s->scan_id_count = 0; | |
589 | } | |
590 | ||
591 | ||
5f738a21 LC |
592 | static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) |
593 | { | |
594 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
595 | struct wpa_ssid *ssid; | |
4115303b | 596 | int ret; |
b9b12d02 | 597 | struct wpabuf *extra_ie = NULL; |
e76baaac | 598 | struct wpa_driver_scan_params params; |
7c865c68 | 599 | struct wpa_driver_scan_params *scan_params; |
e76baaac | 600 | size_t max_ssids; |
207ef3fb | 601 | enum wpa_states prev_state; |
6fc6879b | 602 | |
cf70d298 | 603 | if (wpa_s->pno || wpa_s->pno_sched_pending) { |
dd271857 RM |
604 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress"); |
605 | return; | |
606 | } | |
607 | ||
8401a6b0 | 608 | if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { |
f049052b | 609 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); |
8401a6b0 JM |
610 | return; |
611 | } | |
612 | ||
4115303b | 613 | if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) { |
ac06fb12 | 614 | wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan"); |
3180d7a2 | 615 | wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); |
6fc6879b | 616 | return; |
3180d7a2 | 617 | } |
6fc6879b | 618 | |
f86d282f JJ |
619 | if (wpa_s->scanning) { |
620 | /* | |
621 | * If we are already in scanning state, we shall reschedule the | |
622 | * the incoming scan request. | |
623 | */ | |
624 | wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req"); | |
625 | wpa_supplicant_req_scan(wpa_s, 1, 0); | |
626 | return; | |
627 | } | |
628 | ||
349493bd | 629 | if (!wpa_supplicant_enabled_networks(wpa_s) && |
4115303b | 630 | wpa_s->scan_req == NORMAL_SCAN_REQ) { |
f049052b | 631 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); |
6fc6879b JM |
632 | wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); |
633 | return; | |
634 | } | |
6fc6879b | 635 | |
c2a04078 JM |
636 | if (wpa_s->conf->ap_scan != 0 && |
637 | (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { | |
f049052b BG |
638 | wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " |
639 | "overriding ap_scan configuration"); | |
6fc6879b | 640 | wpa_s->conf->ap_scan = 0; |
8bac466b | 641 | wpas_notify_ap_scan_changed(wpa_s); |
6fc6879b JM |
642 | } |
643 | ||
644 | if (wpa_s->conf->ap_scan == 0) { | |
645 | wpa_supplicant_gen_assoc_event(wpa_s); | |
646 | return; | |
647 | } | |
648 | ||
6470f471 | 649 | if (wpas_p2p_in_progress(wpa_s)) { |
1b5d4714 JM |
650 | wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress"); |
651 | wpa_supplicant_req_scan(wpa_s, 5, 0); | |
652 | return; | |
303f60d3 | 653 | } |
303f60d3 | 654 | |
17fbb751 | 655 | if (wpa_s->conf->ap_scan == 2) |
e76baaac JM |
656 | max_ssids = 1; |
657 | else { | |
658 | max_ssids = wpa_s->max_scan_ssids; | |
659 | if (max_ssids > WPAS_MAX_SCAN_SSIDS) | |
660 | max_ssids = WPAS_MAX_SCAN_SSIDS; | |
661 | } | |
662 | ||
12455031 | 663 | wpa_s->last_scan_req = wpa_s->scan_req; |
4115303b | 664 | wpa_s->scan_req = NORMAL_SCAN_REQ; |
e76baaac JM |
665 | |
666 | os_memset(¶ms, 0, sizeof(params)); | |
667 | ||
207ef3fb | 668 | prev_state = wpa_s->wpa_state; |
6fc6879b JM |
669 | if (wpa_s->wpa_state == WPA_DISCONNECTED || |
670 | wpa_s->wpa_state == WPA_INACTIVE) | |
671 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
672 | ||
7c865c68 TB |
673 | /* |
674 | * If autoscan has set its own scanning parameters | |
675 | */ | |
676 | if (wpa_s->autoscan_params != NULL) { | |
677 | scan_params = wpa_s->autoscan_params; | |
678 | goto scan; | |
679 | } | |
680 | ||
12455031 LP |
681 | if (wpa_s->last_scan_req != MANUAL_SCAN_REQ && |
682 | wpa_s->connect_without_scan) { | |
7dcdcfd6 JM |
683 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
684 | if (ssid == wpa_s->connect_without_scan) | |
685 | break; | |
686 | } | |
687 | wpa_s->connect_without_scan = NULL; | |
688 | if (ssid) { | |
689 | wpa_printf(MSG_DEBUG, "Start a pre-selected network " | |
690 | "without scan step"); | |
691 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
692 | return; | |
693 | } | |
694 | } | |
695 | ||
a21c05db | 696 | #ifdef CONFIG_P2P |
85ea132a JM |
697 | if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) && |
698 | wpa_s->go_params) { | |
9100b660 JM |
699 | wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)", |
700 | wpa_s->p2p_in_provisioning, | |
701 | wpa_s->show_group_started); | |
a21c05db JM |
702 | params.ssids[0].ssid = wpa_s->go_params->ssid; |
703 | params.ssids[0].ssid_len = wpa_s->go_params->ssid_len; | |
704 | params.num_ssids = 1; | |
705 | goto ssid_list_set; | |
706 | } | |
41d5ce9e RR |
707 | |
708 | if (wpa_s->p2p_in_invitation) { | |
709 | if (wpa_s->current_ssid) { | |
710 | wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation"); | |
711 | params.ssids[0].ssid = wpa_s->current_ssid->ssid; | |
712 | params.ssids[0].ssid_len = | |
713 | wpa_s->current_ssid->ssid_len; | |
714 | params.num_ssids = 1; | |
715 | } else { | |
716 | wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation"); | |
717 | } | |
718 | goto ssid_list_set; | |
719 | } | |
a21c05db JM |
720 | #endif /* CONFIG_P2P */ |
721 | ||
e76baaac | 722 | /* Find the starting point from which to continue scanning */ |
6fc6879b | 723 | ssid = wpa_s->conf->ssid; |
ba2a573c | 724 | if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { |
6fc6879b JM |
725 | while (ssid) { |
726 | if (ssid == wpa_s->prev_scan_ssid) { | |
727 | ssid = ssid->next; | |
728 | break; | |
729 | } | |
730 | ssid = ssid->next; | |
731 | } | |
732 | } | |
6fc6879b | 733 | |
12455031 LP |
734 | if (wpa_s->last_scan_req != MANUAL_SCAN_REQ && |
735 | wpa_s->conf->ap_scan == 2) { | |
7dcdcfd6 | 736 | wpa_s->connect_without_scan = NULL; |
b3aa456b | 737 | wpa_s->prev_scan_wildcard = 0; |
e76baaac JM |
738 | wpa_supplicant_assoc_try(wpa_s, ssid); |
739 | return; | |
740 | } else if (wpa_s->conf->ap_scan == 2) { | |
6fc6879b | 741 | /* |
ba2a573c JM |
742 | * User-initiated scan request in ap_scan == 2; scan with |
743 | * wildcard SSID. | |
6fc6879b | 744 | */ |
e76baaac | 745 | ssid = NULL; |
0f44ec8e PQ |
746 | } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) { |
747 | /* | |
748 | * Perform single-channel single-SSID scan for | |
749 | * reassociate-to-same-BSS operation. | |
750 | */ | |
751 | /* Setup SSID */ | |
752 | ssid = wpa_s->current_ssid; | |
753 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", | |
754 | ssid->ssid, ssid->ssid_len); | |
755 | params.ssids[0].ssid = ssid->ssid; | |
756 | params.ssids[0].ssid_len = ssid->ssid_len; | |
757 | params.num_ssids = 1; | |
758 | ||
759 | /* | |
760 | * Allocate memory for frequency array, allocate one extra | |
761 | * slot for the zero-terminator. | |
762 | */ | |
763 | params.freqs = os_malloc(sizeof(int) * 2); | |
764 | if (params.freqs == NULL) { | |
765 | wpa_dbg(wpa_s, MSG_ERROR, "Memory allocation failed"); | |
766 | return; | |
767 | } | |
768 | params.freqs[0] = wpa_s->assoc_freq; | |
769 | params.freqs[1] = 0; | |
770 | ||
771 | /* | |
772 | * Reset the reattach flag so that we fall back to full scan if | |
773 | * this scan fails. | |
774 | */ | |
775 | wpa_s->reattach = 0; | |
e76baaac | 776 | } else { |
5be45e2e | 777 | struct wpa_ssid *start = ssid, *tssid; |
d3a98225 | 778 | int freqs_set = 0; |
e76baaac JM |
779 | if (ssid == NULL && max_ssids > 1) |
780 | ssid = wpa_s->conf->ssid; | |
781 | while (ssid) { | |
349493bd JM |
782 | if (!wpas_network_disabled(wpa_s, ssid) && |
783 | ssid->scan_ssid) { | |
e76baaac JM |
784 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", |
785 | ssid->ssid, ssid->ssid_len); | |
786 | params.ssids[params.num_ssids].ssid = | |
787 | ssid->ssid; | |
788 | params.ssids[params.num_ssids].ssid_len = | |
789 | ssid->ssid_len; | |
790 | params.num_ssids++; | |
791 | if (params.num_ssids + 1 >= max_ssids) | |
792 | break; | |
793 | } | |
794 | ssid = ssid->next; | |
795 | if (ssid == start) | |
796 | break; | |
797 | if (ssid == NULL && max_ssids > 1 && | |
798 | start != wpa_s->conf->ssid) | |
799 | ssid = wpa_s->conf->ssid; | |
6fc6879b | 800 | } |
d3a98225 | 801 | |
6891f0e6 LJ |
802 | if (wpa_s->scan_id_count && |
803 | wpa_s->last_scan_req == MANUAL_SCAN_REQ) | |
804 | wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids); | |
805 | ||
5be45e2e | 806 | for (tssid = wpa_s->conf->ssid; tssid; tssid = tssid->next) { |
349493bd | 807 | if (wpas_network_disabled(wpa_s, tssid)) |
d3a98225 | 808 | continue; |
5be45e2e | 809 | if ((params.freqs || !freqs_set) && tssid->scan_freq) { |
d3a98225 | 810 | int_array_concat(¶ms.freqs, |
5be45e2e | 811 | tssid->scan_freq); |
d3a98225 JM |
812 | } else { |
813 | os_free(params.freqs); | |
814 | params.freqs = NULL; | |
815 | } | |
816 | freqs_set = 1; | |
817 | } | |
818 | int_array_sort_unique(params.freqs); | |
6fc6879b JM |
819 | } |
820 | ||
b3aa456b ES |
821 | if (ssid && max_ssids == 1) { |
822 | /* | |
823 | * If the driver is limited to 1 SSID at a time interleave | |
824 | * wildcard SSID scans with specific SSID scans to avoid | |
825 | * waiting a long time for a wildcard scan. | |
826 | */ | |
827 | if (!wpa_s->prev_scan_wildcard) { | |
828 | params.ssids[0].ssid = NULL; | |
829 | params.ssids[0].ssid_len = 0; | |
830 | wpa_s->prev_scan_wildcard = 1; | |
831 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for " | |
832 | "wildcard SSID (Interleave with specific)"); | |
833 | } else { | |
834 | wpa_s->prev_scan_ssid = ssid; | |
835 | wpa_s->prev_scan_wildcard = 0; | |
836 | wpa_dbg(wpa_s, MSG_DEBUG, | |
837 | "Starting AP scan for specific SSID: %s", | |
838 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
e76baaac | 839 | } |
b3aa456b ES |
840 | } else if (ssid) { |
841 | /* max_ssids > 1 */ | |
842 | ||
843 | wpa_s->prev_scan_ssid = ssid; | |
844 | wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " | |
845 | "the scan request"); | |
846 | params.num_ssids++; | |
88c2d488 JM |
847 | } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
848 | wpa_s->manual_scan_passive && params.num_ssids == 0) { | |
849 | wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request"); | |
e76baaac | 850 | } else { |
ba2a573c | 851 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac | 852 | params.num_ssids++; |
f049052b BG |
853 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " |
854 | "SSID"); | |
6fc6879b | 855 | } |
a21c05db JM |
856 | #ifdef CONFIG_P2P |
857 | ssid_list_set: | |
858 | #endif /* CONFIG_P2P */ | |
6fc6879b | 859 | |
5f738a21 | 860 | wpa_supplicant_optimize_freqs(wpa_s, ¶ms); |
a13e07ec | 861 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
0e65037c | 862 | |
949938aa JM |
863 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
864 | wpa_s->manual_scan_only_new) | |
865 | params.only_new_results = 1; | |
866 | ||
fee52342 JM |
867 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL && |
868 | wpa_s->manual_scan_freqs) { | |
869 | wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels"); | |
870 | params.freqs = wpa_s->manual_scan_freqs; | |
871 | wpa_s->manual_scan_freqs = NULL; | |
872 | } | |
873 | ||
f47d639d | 874 | if (params.freqs == NULL && wpa_s->next_scan_freqs) { |
f049052b BG |
875 | wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " |
876 | "generated frequency list"); | |
f47d639d JM |
877 | params.freqs = wpa_s->next_scan_freqs; |
878 | } else | |
879 | os_free(wpa_s->next_scan_freqs); | |
880 | wpa_s->next_scan_freqs = NULL; | |
faf9a858 | 881 | wpa_setband_scan_freqs(wpa_s, ¶ms); |
f47d639d | 882 | |
f5ffc348 BG |
883 | /* See if user specified frequencies. If so, scan only those. */ |
884 | if (wpa_s->conf->freq_list && !params.freqs) { | |
885 | wpa_dbg(wpa_s, MSG_DEBUG, | |
886 | "Optimize scan based on conf->freq_list"); | |
887 | int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); | |
888 | } | |
889 | ||
6124e858 BG |
890 | /* Use current associated channel? */ |
891 | if (wpa_s->conf->scan_cur_freq && !params.freqs) { | |
53c5dfc2 IP |
892 | unsigned int num = wpa_s->num_multichan_concurrent; |
893 | ||
894 | params.freqs = os_calloc(num + 1, sizeof(int)); | |
895 | if (params.freqs) { | |
896 | num = get_shared_radio_freqs(wpa_s, params.freqs, num); | |
897 | if (num > 0) { | |
898 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the " | |
899 | "current operating channels since " | |
900 | "scan_cur_freq is enabled"); | |
901 | } else { | |
902 | os_free(params.freqs); | |
903 | params.freqs = NULL; | |
904 | } | |
6124e858 BG |
905 | } |
906 | } | |
907 | ||
3812464c JM |
908 | params.filter_ssids = wpa_supplicant_build_filter_ssids( |
909 | wpa_s->conf, ¶ms.num_filter_ssids); | |
46ee0427 JM |
910 | if (extra_ie) { |
911 | params.extra_ies = wpabuf_head(extra_ie); | |
912 | params.extra_ies_len = wpabuf_len(extra_ie); | |
913 | } | |
3812464c | 914 | |
d1dd48e3 | 915 | #ifdef CONFIG_P2P |
8235f89f | 916 | if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation || |
85ea132a | 917 | (wpa_s->show_group_started && wpa_s->go_params)) { |
d1dd48e3 JM |
918 | /* |
919 | * The interface may not yet be in P2P mode, so we have to | |
920 | * explicitly request P2P probe to disable CCK rates. | |
921 | */ | |
922 | params.p2p_probe = 1; | |
923 | } | |
924 | #endif /* CONFIG_P2P */ | |
925 | ||
7c865c68 TB |
926 | scan_params = ¶ms; |
927 | ||
928 | scan: | |
5cc70322 JM |
929 | #ifdef CONFIG_P2P |
930 | /* | |
931 | * If the driver does not support multi-channel concurrency and a | |
932 | * virtual interface that shares the same radio with the wpa_s interface | |
933 | * is operating there may not be need to scan other channels apart from | |
934 | * the current operating channel on the other virtual interface. Filter | |
935 | * out other channels in case we are trying to find a connection for a | |
936 | * station interface when we are not configured to prefer station | |
937 | * connection and a concurrent operation is already in process. | |
938 | */ | |
12455031 LP |
939 | if (wpa_s->scan_for_connection && |
940 | wpa_s->last_scan_req == NORMAL_SCAN_REQ && | |
5cc70322 JM |
941 | !scan_params->freqs && !params.freqs && |
942 | wpas_is_p2p_prioritized(wpa_s) && | |
5cc70322 JM |
943 | wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && |
944 | non_p2p_network_enabled(wpa_s)) { | |
53c5dfc2 IP |
945 | unsigned int num = wpa_s->num_multichan_concurrent; |
946 | ||
947 | params.freqs = os_calloc(num + 1, sizeof(int)); | |
948 | if (params.freqs) { | |
949 | num = get_shared_radio_freqs(wpa_s, params.freqs, num); | |
950 | if (num > 0 && num == wpa_s->num_multichan_concurrent) { | |
951 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used"); | |
952 | } else { | |
953 | os_free(params.freqs); | |
954 | params.freqs = NULL; | |
955 | } | |
5cc70322 JM |
956 | } |
957 | } | |
958 | #endif /* CONFIG_P2P */ | |
959 | ||
7c865c68 | 960 | ret = wpa_supplicant_trigger_scan(wpa_s, scan_params); |
6fc6879b | 961 | |
fee52342 JM |
962 | if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs && |
963 | !wpa_s->manual_scan_freqs) { | |
964 | /* Restore manual_scan_freqs for the next attempt */ | |
965 | wpa_s->manual_scan_freqs = params.freqs; | |
966 | params.freqs = NULL; | |
967 | } | |
968 | ||
46ee0427 | 969 | wpabuf_free(extra_ie); |
d3a98225 | 970 | os_free(params.freqs); |
3812464c | 971 | os_free(params.filter_ssids); |
ad08c363 | 972 | |
6fc6879b | 973 | if (ret) { |
f049052b | 974 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); |
207ef3fb JM |
975 | if (prev_state != wpa_s->wpa_state) |
976 | wpa_supplicant_set_state(wpa_s, prev_state); | |
23270cd8 | 977 | /* Restore scan_req since we will try to scan again */ |
12455031 | 978 | wpa_s->scan_req = wpa_s->last_scan_req; |
1c4c9c50 | 979 | wpa_supplicant_req_scan(wpa_s, 1, 0); |
5cc70322 JM |
980 | } else { |
981 | wpa_s->scan_for_connection = 0; | |
d902a9c1 | 982 | } |
6fc6879b JM |
983 | } |
984 | ||
985 | ||
9e737f08 PF |
986 | void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec) |
987 | { | |
594516b4 | 988 | struct os_reltime remaining, new_int; |
9e737f08 PF |
989 | int cancelled; |
990 | ||
991 | cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL, | |
992 | &remaining); | |
993 | ||
994 | new_int.sec = sec; | |
995 | new_int.usec = 0; | |
594516b4 | 996 | if (cancelled && os_reltime_before(&remaining, &new_int)) { |
9e737f08 PF |
997 | new_int.sec = remaining.sec; |
998 | new_int.usec = remaining.usec; | |
999 | } | |
1000 | ||
c6f5dec9 PF |
1001 | if (cancelled) { |
1002 | eloop_register_timeout(new_int.sec, new_int.usec, | |
1003 | wpa_supplicant_scan, wpa_s, NULL); | |
1004 | } | |
9e737f08 PF |
1005 | wpa_s->scan_interval = sec; |
1006 | } | |
1007 | ||
1008 | ||
6fc6879b JM |
1009 | /** |
1010 | * wpa_supplicant_req_scan - Schedule a scan for neighboring access points | |
1011 | * @wpa_s: Pointer to wpa_supplicant data | |
1012 | * @sec: Number of seconds after which to scan | |
1013 | * @usec: Number of microseconds after which to scan | |
1014 | * | |
1015 | * This function is used to schedule a scan for neighboring access points after | |
1016 | * the specified time. | |
1017 | */ | |
1018 | void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) | |
1019 | { | |
a09ffd5f JM |
1020 | int res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, |
1021 | NULL); | |
1022 | if (res == 1) { | |
1023 | wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec", | |
e2f5a988 | 1024 | sec, usec); |
a09ffd5f JM |
1025 | } else if (res == 0) { |
1026 | wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner", | |
1027 | sec, usec); | |
1028 | } else { | |
1029 | wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec", | |
1030 | sec, usec); | |
1031 | eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); | |
e2f5a988 | 1032 | } |
6fc6879b JM |
1033 | } |
1034 | ||
1035 | ||
6a90053c LC |
1036 | /** |
1037 | * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan | |
1038 | * @wpa_s: Pointer to wpa_supplicant data | |
1039 | * @sec: Number of seconds after which to scan | |
1040 | * @usec: Number of microseconds after which to scan | |
2c09af30 | 1041 | * Returns: 0 on success or -1 otherwise |
6a90053c LC |
1042 | * |
1043 | * This function is used to schedule periodic scans for neighboring | |
1044 | * access points after the specified time. | |
1045 | */ | |
1046 | int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, | |
1047 | int sec, int usec) | |
1048 | { | |
1049 | if (!wpa_s->sched_scan_supported) | |
1050 | return -1; | |
1051 | ||
1052 | eloop_register_timeout(sec, usec, | |
1053 | wpa_supplicant_delayed_sched_scan_timeout, | |
1054 | wpa_s, NULL); | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | ||
cbdf3507 LC |
1060 | /** |
1061 | * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan | |
1062 | * @wpa_s: Pointer to wpa_supplicant data | |
2c09af30 | 1063 | * Returns: 0 is sched_scan was started or -1 otherwise |
cbdf3507 LC |
1064 | * |
1065 | * This function is used to schedule periodic scans for neighboring | |
1066 | * access points repeating the scan continuously. | |
1067 | */ | |
1068 | int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) | |
1069 | { | |
1070 | struct wpa_driver_scan_params params; | |
7c865c68 | 1071 | struct wpa_driver_scan_params *scan_params; |
cbdf3507 | 1072 | enum wpa_states prev_state; |
7c865c68 | 1073 | struct wpa_ssid *ssid = NULL; |
a13e07ec | 1074 | struct wpabuf *extra_ie = NULL; |
cbdf3507 | 1075 | int ret; |
cbdf3507 | 1076 | unsigned int max_sched_scan_ssids; |
76a5249e | 1077 | int wildcard = 0; |
0b7a25c0 | 1078 | int need_ssids; |
cbdf3507 LC |
1079 | |
1080 | if (!wpa_s->sched_scan_supported) | |
1081 | return -1; | |
1082 | ||
1083 | if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) | |
1084 | max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; | |
1085 | else | |
1086 | max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; | |
54ddd743 | 1087 | if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload) |
76a5249e | 1088 | return -1; |
cbdf3507 | 1089 | |
1966e3d1 ES |
1090 | if (wpa_s->sched_scanning) { |
1091 | wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning"); | |
cbdf3507 | 1092 | return 0; |
1966e3d1 | 1093 | } |
cbdf3507 | 1094 | |
0b7a25c0 JM |
1095 | need_ssids = 0; |
1096 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
349493bd | 1097 | if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) { |
0b7a25c0 JM |
1098 | /* Use wildcard SSID to find this network */ |
1099 | wildcard = 1; | |
349493bd JM |
1100 | } else if (!wpas_network_disabled(wpa_s, ssid) && |
1101 | ssid->ssid_len) | |
0b7a25c0 | 1102 | need_ssids++; |
aa283ddd JM |
1103 | |
1104 | #ifdef CONFIG_WPS | |
349493bd | 1105 | if (!wpas_network_disabled(wpa_s, ssid) && |
fea7c3a0 | 1106 | ssid->key_mgmt == WPA_KEY_MGMT_WPS) { |
aa283ddd JM |
1107 | /* |
1108 | * Normal scan is more reliable and faster for WPS | |
1109 | * operations and since these are for short periods of | |
1110 | * time, the benefit of trying to use sched_scan would | |
1111 | * be limited. | |
1112 | */ | |
1113 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
1114 | "sched_scan for WPS"); | |
1115 | return -1; | |
1116 | } | |
1117 | #endif /* CONFIG_WPS */ | |
0b7a25c0 JM |
1118 | } |
1119 | if (wildcard) | |
1120 | need_ssids++; | |
1121 | ||
1122 | if (wpa_s->normal_scans < 3 && | |
1123 | (need_ssids <= wpa_s->max_scan_ssids || | |
1124 | wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) { | |
1125 | /* | |
1126 | * When normal scan can speed up operations, use that for the | |
1127 | * first operations before starting the sched_scan to allow | |
1128 | * user space sleep more. We do this only if the normal scan | |
1129 | * has functionality that is suitable for this or if the | |
1130 | * sched_scan does not have better support for multiple SSIDs. | |
1131 | */ | |
1132 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
1133 | "sched_scan for initial scans (normal_scans=%d)", | |
1134 | wpa_s->normal_scans); | |
1135 | return -1; | |
1136 | } | |
1137 | ||
cbdf3507 LC |
1138 | os_memset(¶ms, 0, sizeof(params)); |
1139 | ||
b59e6f26 LC |
1140 | /* If we can't allocate space for the filters, we just don't filter */ |
1141 | params.filter_ssids = os_zalloc(wpa_s->max_match_sets * | |
1142 | sizeof(struct wpa_driver_scan_filter)); | |
1143 | ||
cbdf3507 LC |
1144 | prev_state = wpa_s->wpa_state; |
1145 | if (wpa_s->wpa_state == WPA_DISCONNECTED || | |
1146 | wpa_s->wpa_state == WPA_INACTIVE) | |
1147 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
1148 | ||
7c865c68 TB |
1149 | if (wpa_s->autoscan_params != NULL) { |
1150 | scan_params = wpa_s->autoscan_params; | |
1151 | goto scan; | |
1152 | } | |
1153 | ||
cbdf3507 LC |
1154 | /* Find the starting point from which to continue scanning */ |
1155 | ssid = wpa_s->conf->ssid; | |
1156 | if (wpa_s->prev_sched_ssid) { | |
1157 | while (ssid) { | |
1158 | if (ssid == wpa_s->prev_sched_ssid) { | |
1159 | ssid = ssid->next; | |
1160 | break; | |
1161 | } | |
1162 | ssid = ssid->next; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | if (!ssid || !wpa_s->prev_sched_ssid) { | |
1167 | wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); | |
4aa81868 SF |
1168 | if (wpa_s->conf->sched_scan_interval) |
1169 | wpa_s->sched_scan_interval = | |
1170 | wpa_s->conf->sched_scan_interval; | |
7c865c68 TB |
1171 | if (wpa_s->sched_scan_interval == 0) |
1172 | wpa_s->sched_scan_interval = 10; | |
cbdf3507 LC |
1173 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; |
1174 | wpa_s->first_sched_scan = 1; | |
1175 | ssid = wpa_s->conf->ssid; | |
1176 | wpa_s->prev_sched_ssid = ssid; | |
1177 | } | |
1178 | ||
76a5249e JM |
1179 | if (wildcard) { |
1180 | wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan"); | |
1181 | params.num_ssids++; | |
1182 | } | |
1183 | ||
cbdf3507 | 1184 | while (ssid) { |
349493bd | 1185 | if (wpas_network_disabled(wpa_s, ssid)) |
5edddf41 | 1186 | goto next; |
cbdf3507 | 1187 | |
fcd16847 JM |
1188 | if (params.num_filter_ssids < wpa_s->max_match_sets && |
1189 | params.filter_ssids && ssid->ssid && ssid->ssid_len) { | |
1966e3d1 ES |
1190 | wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s", |
1191 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
b59e6f26 LC |
1192 | os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid, |
1193 | ssid->ssid, ssid->ssid_len); | |
1194 | params.filter_ssids[params.num_filter_ssids].ssid_len = | |
1195 | ssid->ssid_len; | |
1196 | params.num_filter_ssids++; | |
86b47aaf JM |
1197 | } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len) |
1198 | { | |
1199 | wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID " | |
1200 | "filter for sched_scan - drop filter"); | |
1201 | os_free(params.filter_ssids); | |
1202 | params.filter_ssids = NULL; | |
1203 | params.num_filter_ssids = 0; | |
b59e6f26 LC |
1204 | } |
1205 | ||
3f56f3a4 | 1206 | if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) { |
76a5249e JM |
1207 | if (params.num_ssids == max_sched_scan_ssids) |
1208 | break; /* only room for broadcast SSID */ | |
3f56f3a4 JM |
1209 | wpa_dbg(wpa_s, MSG_DEBUG, |
1210 | "add to active scan ssid: %s", | |
1966e3d1 | 1211 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); |
cbdf3507 LC |
1212 | params.ssids[params.num_ssids].ssid = |
1213 | ssid->ssid; | |
1214 | params.ssids[params.num_ssids].ssid_len = | |
1215 | ssid->ssid_len; | |
1216 | params.num_ssids++; | |
b59e6f26 | 1217 | if (params.num_ssids >= max_sched_scan_ssids) { |
cbdf3507 | 1218 | wpa_s->prev_sched_ssid = ssid; |
b55aca46 JM |
1219 | do { |
1220 | ssid = ssid->next; | |
1221 | } while (ssid && | |
349493bd | 1222 | (wpas_network_disabled(wpa_s, ssid) || |
fea7c3a0 | 1223 | !ssid->scan_ssid)); |
cbdf3507 LC |
1224 | break; |
1225 | } | |
1226 | } | |
b59e6f26 | 1227 | |
5edddf41 | 1228 | next: |
cbdf3507 LC |
1229 | wpa_s->prev_sched_ssid = ssid; |
1230 | ssid = ssid->next; | |
1231 | } | |
1232 | ||
7c6a266c JM |
1233 | if (params.num_filter_ssids == 0) { |
1234 | os_free(params.filter_ssids); | |
1235 | params.filter_ssids = NULL; | |
1236 | } | |
1237 | ||
a13e07ec ES |
1238 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
1239 | if (extra_ie) { | |
1240 | params.extra_ies = wpabuf_head(extra_ie); | |
1241 | params.extra_ies_len = wpabuf_len(extra_ie); | |
1242 | } | |
cbdf3507 | 1243 | |
cf70d298 RM |
1244 | if (wpa_s->conf->filter_rssi) |
1245 | params.filter_rssi = wpa_s->conf->filter_rssi; | |
1246 | ||
1cc0d6a0 BP |
1247 | /* See if user specified frequencies. If so, scan only those. */ |
1248 | if (wpa_s->conf->freq_list && !params.freqs) { | |
1249 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1250 | "Optimize scan based on conf->freq_list"); | |
1251 | int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); | |
1252 | } | |
1253 | ||
7c865c68 TB |
1254 | scan_params = ¶ms; |
1255 | ||
1256 | scan: | |
a8cb5a88 | 1257 | if (ssid || !wpa_s->first_sched_scan) { |
a8cb5a88 JM |
1258 | wpa_dbg(wpa_s, MSG_DEBUG, |
1259 | "Starting sched scan: interval %d timeout %d", | |
1260 | wpa_s->sched_scan_interval, wpa_s->sched_scan_timeout); | |
7d21a223 JM |
1261 | } else { |
1262 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1263 | "Starting sched scan: interval %d (no timeout)", | |
1264 | wpa_s->sched_scan_interval); | |
a8cb5a88 | 1265 | } |
cbdf3507 | 1266 | |
faf9a858 JM |
1267 | wpa_setband_scan_freqs(wpa_s, scan_params); |
1268 | ||
7c865c68 | 1269 | ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params, |
cbdf3507 | 1270 | wpa_s->sched_scan_interval); |
a13e07ec | 1271 | wpabuf_free(extra_ie); |
b59e6f26 | 1272 | os_free(params.filter_ssids); |
cbdf3507 LC |
1273 | if (ret) { |
1274 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); | |
1275 | if (prev_state != wpa_s->wpa_state) | |
1276 | wpa_supplicant_set_state(wpa_s, prev_state); | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | /* If we have more SSIDs to scan, add a timeout so we scan them too */ | |
1281 | if (ssid || !wpa_s->first_sched_scan) { | |
1282 | wpa_s->sched_scan_timed_out = 0; | |
1283 | eloop_register_timeout(wpa_s->sched_scan_timeout, 0, | |
1284 | wpa_supplicant_sched_scan_timeout, | |
1285 | wpa_s, NULL); | |
1286 | wpa_s->first_sched_scan = 0; | |
1287 | wpa_s->sched_scan_timeout /= 2; | |
1288 | wpa_s->sched_scan_interval *= 2; | |
a09fc1cc DS |
1289 | if (wpa_s->sched_scan_timeout < wpa_s->sched_scan_interval) { |
1290 | wpa_s->sched_scan_interval = 10; | |
1291 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; | |
1292 | } | |
cbdf3507 LC |
1293 | } |
1294 | ||
7ed52f67 DS |
1295 | /* If there is no more ssids, start next time from the beginning */ |
1296 | if (!ssid) | |
1297 | wpa_s->prev_sched_ssid = NULL; | |
1298 | ||
cbdf3507 LC |
1299 | return 0; |
1300 | } | |
1301 | ||
1302 | ||
6fc6879b JM |
1303 | /** |
1304 | * wpa_supplicant_cancel_scan - Cancel a scheduled scan request | |
1305 | * @wpa_s: Pointer to wpa_supplicant data | |
1306 | * | |
1307 | * This function is used to cancel a scan request scheduled with | |
1308 | * wpa_supplicant_req_scan(). | |
1309 | */ | |
1310 | void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) | |
1311 | { | |
f049052b | 1312 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); |
6fc6879b JM |
1313 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); |
1314 | } | |
cb8564b1 DW |
1315 | |
1316 | ||
831770bf CZ |
1317 | /** |
1318 | * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan | |
1319 | * @wpa_s: Pointer to wpa_supplicant data | |
1320 | * | |
1321 | * This function is used to stop a delayed scheduled scan. | |
1322 | */ | |
1323 | void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s) | |
1324 | { | |
1325 | if (!wpa_s->sched_scan_supported) | |
1326 | return; | |
1327 | ||
1328 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan"); | |
1329 | eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout, | |
1330 | wpa_s, NULL); | |
1331 | } | |
1332 | ||
1333 | ||
cbdf3507 LC |
1334 | /** |
1335 | * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans | |
1336 | * @wpa_s: Pointer to wpa_supplicant data | |
1337 | * | |
1338 | * This function is used to stop a periodic scheduled scan. | |
1339 | */ | |
1340 | void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) | |
1341 | { | |
1342 | if (!wpa_s->sched_scanning) | |
1343 | return; | |
1344 | ||
1345 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); | |
1346 | eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); | |
1347 | wpa_supplicant_stop_sched_scan(wpa_s); | |
1348 | } | |
1349 | ||
1350 | ||
2c09af30 JM |
1351 | /** |
1352 | * wpa_supplicant_notify_scanning - Indicate possible scan state change | |
1353 | * @wpa_s: Pointer to wpa_supplicant data | |
1354 | * @scanning: Whether scanning is currently in progress | |
1355 | * | |
1356 | * This function is to generate scanning notifycations. It is called whenever | |
1357 | * there may have been a change in scanning (scan started, completed, stopped). | |
1358 | * wpas_notify_scanning() is called whenever the scanning state changed from the | |
1359 | * previously notified state. | |
1360 | */ | |
cb8564b1 DW |
1361 | void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, |
1362 | int scanning) | |
1363 | { | |
1364 | if (wpa_s->scanning != scanning) { | |
1365 | wpa_s->scanning = scanning; | |
8bac466b | 1366 | wpas_notify_scanning(wpa_s); |
cb8564b1 DW |
1367 | } |
1368 | } | |
1369 | ||
9ba9fa07 JM |
1370 | |
1371 | static int wpa_scan_get_max_rate(const struct wpa_scan_res *res) | |
1372 | { | |
1373 | int rate = 0; | |
1374 | const u8 *ie; | |
1375 | int i; | |
1376 | ||
1377 | ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); | |
1378 | for (i = 0; ie && i < ie[1]; i++) { | |
1379 | if ((ie[i + 2] & 0x7f) > rate) | |
1380 | rate = ie[i + 2] & 0x7f; | |
1381 | } | |
1382 | ||
1383 | ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); | |
1384 | for (i = 0; ie && i < ie[1]; i++) { | |
1385 | if ((ie[i + 2] & 0x7f) > rate) | |
1386 | rate = ie[i + 2] & 0x7f; | |
1387 | } | |
1388 | ||
1389 | return rate; | |
1390 | } | |
1391 | ||
1392 | ||
2c09af30 JM |
1393 | /** |
1394 | * wpa_scan_get_ie - Fetch a specified information element from a scan result | |
1395 | * @res: Scan result entry | |
1396 | * @ie: Information element identitifier (WLAN_EID_*) | |
1397 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1398 | * | |
1399 | * This function returns the first matching information element in the scan | |
1400 | * result. | |
1401 | */ | |
d1f9c410 JM |
1402 | const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) |
1403 | { | |
1404 | const u8 *end, *pos; | |
1405 | ||
1406 | pos = (const u8 *) (res + 1); | |
1407 | end = pos + res->ie_len; | |
1408 | ||
1409 | while (pos + 1 < end) { | |
1410 | if (pos + 2 + pos[1] > end) | |
1411 | break; | |
1412 | if (pos[0] == ie) | |
1413 | return pos; | |
1414 | pos += 2 + pos[1]; | |
1415 | } | |
1416 | ||
1417 | return NULL; | |
1418 | } | |
1419 | ||
1420 | ||
2c09af30 JM |
1421 | /** |
1422 | * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result | |
1423 | * @res: Scan result entry | |
1424 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1425 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1426 | * | |
1427 | * This function returns the first matching information element in the scan | |
1428 | * result. | |
1429 | */ | |
9ba9fa07 JM |
1430 | const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, |
1431 | u32 vendor_type) | |
1432 | { | |
1433 | const u8 *end, *pos; | |
1434 | ||
1435 | pos = (const u8 *) (res + 1); | |
1436 | end = pos + res->ie_len; | |
1437 | ||
1438 | while (pos + 1 < end) { | |
1439 | if (pos + 2 + pos[1] > end) | |
1440 | break; | |
1441 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1442 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1443 | return pos; | |
1444 | pos += 2 + pos[1]; | |
1445 | } | |
1446 | ||
1447 | return NULL; | |
1448 | } | |
1449 | ||
1450 | ||
aaeb9c98 JM |
1451 | /** |
1452 | * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result | |
1453 | * @res: Scan result entry | |
1454 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1455 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1456 | * | |
1457 | * This function returns the first matching information element in the scan | |
1458 | * result. | |
1459 | * | |
1460 | * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only | |
1461 | * from Beacon frames instead of either Beacon or Probe Response frames. | |
1462 | */ | |
1463 | const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, | |
1464 | u32 vendor_type) | |
1465 | { | |
1466 | const u8 *end, *pos; | |
1467 | ||
1468 | if (res->beacon_ie_len == 0) | |
1469 | return NULL; | |
1470 | ||
1471 | pos = (const u8 *) (res + 1); | |
1472 | pos += res->ie_len; | |
1473 | end = pos + res->beacon_ie_len; | |
1474 | ||
1475 | while (pos + 1 < end) { | |
1476 | if (pos + 2 + pos[1] > end) | |
1477 | break; | |
1478 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1479 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1480 | return pos; | |
1481 | pos += 2 + pos[1]; | |
1482 | } | |
1483 | ||
1484 | return NULL; | |
1485 | } | |
1486 | ||
1487 | ||
2c09af30 JM |
1488 | /** |
1489 | * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result | |
1490 | * @res: Scan result entry | |
1491 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1492 | * Returns: Pointer to the information element payload or %NULL if not found | |
1493 | * | |
1494 | * This function returns concatenated payload of possibly fragmented vendor | |
1495 | * specific information elements in the scan result. The caller is responsible | |
1496 | * for freeing the returned buffer. | |
1497 | */ | |
9ba9fa07 JM |
1498 | struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, |
1499 | u32 vendor_type) | |
1500 | { | |
1501 | struct wpabuf *buf; | |
1502 | const u8 *end, *pos; | |
1503 | ||
1504 | buf = wpabuf_alloc(res->ie_len); | |
1505 | if (buf == NULL) | |
1506 | return NULL; | |
1507 | ||
1508 | pos = (const u8 *) (res + 1); | |
1509 | end = pos + res->ie_len; | |
1510 | ||
54f489be JM |
1511 | while (pos + 1 < end) { |
1512 | if (pos + 2 + pos[1] > end) | |
1513 | break; | |
1514 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1515 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1516 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
1517 | pos += 2 + pos[1]; | |
1518 | } | |
1519 | ||
1520 | if (wpabuf_len(buf) == 0) { | |
1521 | wpabuf_free(buf); | |
1522 | buf = NULL; | |
1523 | } | |
1524 | ||
1525 | return buf; | |
1526 | } | |
1527 | ||
1528 | ||
577db0ae GM |
1529 | /* |
1530 | * Channels with a great SNR can operate at full rate. What is a great SNR? | |
1531 | * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general | |
1532 | * rule of thumb is that any SNR above 20 is good." This one | |
1533 | * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 | |
1534 | * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a | |
1535 | * conservative value. | |
1536 | */ | |
1537 | #define GREAT_SNR 30 | |
1538 | ||
9ba9fa07 JM |
1539 | /* Compare function for sorting scan results. Return >0 if @b is considered |
1540 | * better. */ | |
1541 | static int wpa_scan_result_compar(const void *a, const void *b) | |
1542 | { | |
577db0ae GM |
1543 | #define IS_5GHZ(n) (n > 4000) |
1544 | #define MIN(a,b) a < b ? a : b | |
9ba9fa07 JM |
1545 | struct wpa_scan_res **_wa = (void *) a; |
1546 | struct wpa_scan_res **_wb = (void *) b; | |
1547 | struct wpa_scan_res *wa = *_wa; | |
1548 | struct wpa_scan_res *wb = *_wb; | |
1549 | int wpa_a, wpa_b, maxrate_a, maxrate_b; | |
577db0ae | 1550 | int snr_a, snr_b; |
9ba9fa07 JM |
1551 | |
1552 | /* WPA/WPA2 support preferred */ | |
1553 | wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || | |
1554 | wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; | |
1555 | wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || | |
1556 | wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; | |
1557 | ||
1558 | if (wpa_b && !wpa_a) | |
1559 | return 1; | |
1560 | if (!wpa_b && wpa_a) | |
1561 | return -1; | |
1562 | ||
1563 | /* privacy support preferred */ | |
1564 | if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && | |
1565 | (wb->caps & IEEE80211_CAP_PRIVACY)) | |
1566 | return 1; | |
1567 | if ((wa->caps & IEEE80211_CAP_PRIVACY) && | |
1568 | (wb->caps & IEEE80211_CAP_PRIVACY) == 0) | |
1569 | return -1; | |
1570 | ||
577db0ae GM |
1571 | if ((wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) && |
1572 | !((wa->flags | wb->flags) & WPA_SCAN_NOISE_INVALID)) { | |
1573 | snr_a = MIN(wa->level - wa->noise, GREAT_SNR); | |
1574 | snr_b = MIN(wb->level - wb->noise, GREAT_SNR); | |
1575 | } else { | |
1576 | /* Not suitable information to calculate SNR, so use level */ | |
1577 | snr_a = wa->level; | |
1578 | snr_b = wb->level; | |
1579 | } | |
1580 | ||
577db0ae GM |
1581 | /* best/max rate preferred if SNR close enough */ |
1582 | if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) || | |
9ba9fa07 JM |
1583 | (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { |
1584 | maxrate_a = wpa_scan_get_max_rate(wa); | |
1585 | maxrate_b = wpa_scan_get_max_rate(wb); | |
1586 | if (maxrate_a != maxrate_b) | |
1587 | return maxrate_b - maxrate_a; | |
577db0ae GM |
1588 | if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq)) |
1589 | return IS_5GHZ(wa->freq) ? -1 : 1; | |
9ba9fa07 JM |
1590 | } |
1591 | ||
1592 | /* use freq for channel preference */ | |
1593 | ||
577db0ae | 1594 | /* all things being equal, use SNR; if SNRs are |
9ba9fa07 JM |
1595 | * identical, use quality values since some drivers may only report |
1596 | * that value and leave the signal level zero */ | |
577db0ae | 1597 | if (snr_b == snr_a) |
9ba9fa07 | 1598 | return wb->qual - wa->qual; |
577db0ae GM |
1599 | return snr_b - snr_a; |
1600 | #undef MIN | |
1601 | #undef IS_5GHZ | |
9ba9fa07 JM |
1602 | } |
1603 | ||
1604 | ||
41e650ae JM |
1605 | #ifdef CONFIG_WPS |
1606 | /* Compare function for sorting scan results when searching a WPS AP for | |
1607 | * provisioning. Return >0 if @b is considered better. */ | |
1608 | static int wpa_scan_result_wps_compar(const void *a, const void *b) | |
1609 | { | |
1610 | struct wpa_scan_res **_wa = (void *) a; | |
1611 | struct wpa_scan_res **_wb = (void *) b; | |
1612 | struct wpa_scan_res *wa = *_wa; | |
1613 | struct wpa_scan_res *wb = *_wb; | |
1614 | int uses_wps_a, uses_wps_b; | |
1615 | struct wpabuf *wps_a, *wps_b; | |
1616 | int res; | |
1617 | ||
1618 | /* Optimization - check WPS IE existence before allocated memory and | |
1619 | * doing full reassembly. */ | |
1620 | uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; | |
1621 | uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; | |
1622 | if (uses_wps_a && !uses_wps_b) | |
1623 | return -1; | |
1624 | if (!uses_wps_a && uses_wps_b) | |
1625 | return 1; | |
1626 | ||
1627 | if (uses_wps_a && uses_wps_b) { | |
1628 | wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); | |
1629 | wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); | |
1630 | res = wps_ap_priority_compar(wps_a, wps_b); | |
1631 | wpabuf_free(wps_a); | |
1632 | wpabuf_free(wps_b); | |
1633 | if (res) | |
1634 | return res; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * Do not use current AP security policy as a sorting criteria during | |
1639 | * WPS provisioning step since the AP may get reconfigured at the | |
1640 | * completion of provisioning. | |
1641 | */ | |
1642 | ||
1643 | /* all things being equal, use signal level; if signal levels are | |
1644 | * identical, use quality values since some drivers may only report | |
1645 | * that value and leave the signal level zero */ | |
1646 | if (wb->level == wa->level) | |
1647 | return wb->qual - wa->qual; | |
1648 | return wb->level - wa->level; | |
1649 | } | |
1650 | #endif /* CONFIG_WPS */ | |
1651 | ||
1652 | ||
aa820e02 JM |
1653 | static void dump_scan_res(struct wpa_scan_results *scan_res) |
1654 | { | |
76202aed | 1655 | #ifndef CONFIG_NO_STDOUT_DEBUG |
aa820e02 JM |
1656 | size_t i; |
1657 | ||
1658 | if (scan_res->res == NULL || scan_res->num == 0) | |
1659 | return; | |
1660 | ||
1661 | wpa_printf(MSG_EXCESSIVE, "Sorted scan results"); | |
1662 | ||
1663 | for (i = 0; i < scan_res->num; i++) { | |
1664 | struct wpa_scan_res *r = scan_res->res[i]; | |
1cbe86e2 | 1665 | u8 *pos; |
aa820e02 JM |
1666 | if ((r->flags & (WPA_SCAN_LEVEL_DBM | WPA_SCAN_NOISE_INVALID)) |
1667 | == WPA_SCAN_LEVEL_DBM) { | |
1668 | int snr = r->level - r->noise; | |
1669 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " | |
c5f10e80 JM |
1670 | "noise=%d level=%d snr=%d%s flags=0x%x " |
1671 | "age=%u", | |
aa820e02 JM |
1672 | MAC2STR(r->bssid), r->freq, r->qual, |
1673 | r->noise, r->level, snr, | |
c5f10e80 JM |
1674 | snr >= GREAT_SNR ? "*" : "", r->flags, |
1675 | r->age); | |
aa820e02 JM |
1676 | } else { |
1677 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " | |
c5f10e80 | 1678 | "noise=%d level=%d flags=0x%x age=%u", |
aa820e02 | 1679 | MAC2STR(r->bssid), r->freq, r->qual, |
c5f10e80 | 1680 | r->noise, r->level, r->flags, r->age); |
aa820e02 | 1681 | } |
1cbe86e2 JM |
1682 | pos = (u8 *) (r + 1); |
1683 | if (r->ie_len) | |
1684 | wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len); | |
1685 | pos += r->ie_len; | |
1686 | if (r->beacon_ie_len) | |
1687 | wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs", | |
1688 | pos, r->beacon_ie_len); | |
aa820e02 | 1689 | } |
76202aed | 1690 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
aa820e02 JM |
1691 | } |
1692 | ||
1693 | ||
2c09af30 JM |
1694 | /** |
1695 | * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed | |
1696 | * @wpa_s: Pointer to wpa_supplicant data | |
1697 | * @bssid: BSSID to check | |
1698 | * Returns: 0 if the BSSID is filtered or 1 if not | |
1699 | * | |
1700 | * This function is used to filter out specific BSSIDs from scan reslts mainly | |
1701 | * for testing purposes (SET bssid_filter ctrl_iface command). | |
1702 | */ | |
d445a5cd JM |
1703 | int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, |
1704 | const u8 *bssid) | |
1705 | { | |
1706 | size_t i; | |
1707 | ||
1708 | if (wpa_s->bssid_filter == NULL) | |
1709 | return 1; | |
1710 | ||
1711 | for (i = 0; i < wpa_s->bssid_filter_count; i++) { | |
1712 | if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid, | |
1713 | ETH_ALEN) == 0) | |
1714 | return 1; | |
1715 | } | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | ||
1721 | static void filter_scan_res(struct wpa_supplicant *wpa_s, | |
1722 | struct wpa_scan_results *res) | |
1723 | { | |
1724 | size_t i, j; | |
1725 | ||
1726 | if (wpa_s->bssid_filter == NULL) | |
1727 | return; | |
1728 | ||
1729 | for (i = 0, j = 0; i < res->num; i++) { | |
1730 | if (wpa_supplicant_filter_bssid_match(wpa_s, | |
1731 | res->res[i]->bssid)) { | |
1732 | res->res[j++] = res->res[i]; | |
1733 | } else { | |
1734 | os_free(res->res[i]); | |
1735 | res->res[i] = NULL; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | if (res->num != j) { | |
1740 | wpa_printf(MSG_DEBUG, "Filtered out %d scan results", | |
1741 | (int) (res->num - j)); | |
1742 | res->num = j; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | ||
9ba9fa07 JM |
1747 | /** |
1748 | * wpa_supplicant_get_scan_results - Get scan results | |
1749 | * @wpa_s: Pointer to wpa_supplicant data | |
1750 | * @info: Information about what was scanned or %NULL if not available | |
1751 | * @new_scan: Whether a new scan was performed | |
1752 | * Returns: Scan results, %NULL on failure | |
1753 | * | |
1754 | * This function request the current scan results from the driver and updates | |
1755 | * the local BSS list wpa_s->bss. The caller is responsible for freeing the | |
1756 | * results with wpa_scan_results_free(). | |
1757 | */ | |
1758 | struct wpa_scan_results * | |
1759 | wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, | |
1760 | struct scan_info *info, int new_scan) | |
1761 | { | |
1762 | struct wpa_scan_results *scan_res; | |
1763 | size_t i; | |
41e650ae | 1764 | int (*compar)(const void *, const void *) = wpa_scan_result_compar; |
9ba9fa07 | 1765 | |
17fbb751 | 1766 | scan_res = wpa_drv_get_scan_results2(wpa_s); |
9ba9fa07 | 1767 | if (scan_res == NULL) { |
f049052b | 1768 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); |
9ba9fa07 JM |
1769 | return NULL; |
1770 | } | |
c5f10e80 JM |
1771 | if (scan_res->fetch_time.sec == 0) { |
1772 | /* | |
1773 | * Make sure we have a valid timestamp if the driver wrapper | |
1774 | * does not set this. | |
1775 | */ | |
acb69cec | 1776 | os_get_reltime(&scan_res->fetch_time); |
c5f10e80 | 1777 | } |
d445a5cd | 1778 | filter_scan_res(wpa_s, scan_res); |
9ba9fa07 | 1779 | |
41e650ae | 1780 | #ifdef CONFIG_WPS |
3187fd90 | 1781 | if (wpas_wps_searching(wpa_s)) { |
f049052b BG |
1782 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " |
1783 | "provisioning rules"); | |
41e650ae JM |
1784 | compar = wpa_scan_result_wps_compar; |
1785 | } | |
1786 | #endif /* CONFIG_WPS */ | |
1787 | ||
9ba9fa07 | 1788 | qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *), |
41e650ae | 1789 | compar); |
aa820e02 | 1790 | dump_scan_res(scan_res); |
9ba9fa07 JM |
1791 | |
1792 | wpa_bss_update_start(wpa_s); | |
1793 | for (i = 0; i < scan_res->num; i++) | |
c5f10e80 JM |
1794 | wpa_bss_update_scan_res(wpa_s, scan_res->res[i], |
1795 | &scan_res->fetch_time); | |
9ba9fa07 JM |
1796 | wpa_bss_update_end(wpa_s, info, new_scan); |
1797 | ||
1798 | return scan_res; | |
1799 | } | |
1800 | ||
1801 | ||
2c09af30 JM |
1802 | /** |
1803 | * wpa_supplicant_update_scan_results - Update scan results from the driver | |
1804 | * @wpa_s: Pointer to wpa_supplicant data | |
1805 | * Returns: 0 on success, -1 on failure | |
1806 | * | |
1807 | * This function updates the BSS table within wpa_supplicant based on the | |
1808 | * currently available scan results from the driver without requesting a new | |
1809 | * scan. This is used in cases where the driver indicates an association | |
1810 | * (including roaming within ESS) and wpa_supplicant does not yet have the | |
1811 | * needed information to complete the connection (e.g., to perform validation | |
1812 | * steps in 4-way handshake). | |
1813 | */ | |
9ba9fa07 JM |
1814 | int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) |
1815 | { | |
1816 | struct wpa_scan_results *scan_res; | |
1817 | scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); | |
1818 | if (scan_res == NULL) | |
1819 | return -1; | |
1820 | wpa_scan_results_free(scan_res); | |
1821 | ||
1822 | return 0; | |
1823 | } | |
66fe0f70 DS |
1824 | |
1825 | ||
1826 | /** | |
1827 | * scan_only_handler - Reports scan results | |
1828 | */ | |
1829 | void scan_only_handler(struct wpa_supplicant *wpa_s, | |
1830 | struct wpa_scan_results *scan_res) | |
1831 | { | |
1832 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received"); | |
d81c73be JM |
1833 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
1834 | wpa_s->manual_scan_use_id && wpa_s->own_scan_running) { | |
1835 | wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u", | |
1836 | wpa_s->manual_scan_id); | |
1837 | wpa_s->manual_scan_use_id = 0; | |
1838 | } else { | |
1839 | wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS); | |
1840 | } | |
66fe0f70 DS |
1841 | wpas_notify_scan_results(wpa_s); |
1842 | wpas_notify_scan_done(wpa_s, 1); | |
d12a51b5 JM |
1843 | if (wpa_s->scan_work) { |
1844 | struct wpa_radio_work *work = wpa_s->scan_work; | |
1845 | wpa_s->scan_work = NULL; | |
1846 | radio_work_done(work); | |
1847 | } | |
66fe0f70 | 1848 | } |
407be00b JM |
1849 | |
1850 | ||
1851 | int wpas_scan_scheduled(struct wpa_supplicant *wpa_s) | |
1852 | { | |
1853 | return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL); | |
1854 | } | |
dd43aaa5 JM |
1855 | |
1856 | ||
1857 | struct wpa_driver_scan_params * | |
1858 | wpa_scan_clone_params(const struct wpa_driver_scan_params *src) | |
1859 | { | |
1860 | struct wpa_driver_scan_params *params; | |
1861 | size_t i; | |
1862 | u8 *n; | |
1863 | ||
1864 | params = os_zalloc(sizeof(*params)); | |
1865 | if (params == NULL) | |
1866 | return NULL; | |
1867 | ||
1868 | for (i = 0; i < src->num_ssids; i++) { | |
1869 | if (src->ssids[i].ssid) { | |
1870 | n = os_malloc(src->ssids[i].ssid_len); | |
1871 | if (n == NULL) | |
1872 | goto failed; | |
1873 | os_memcpy(n, src->ssids[i].ssid, | |
1874 | src->ssids[i].ssid_len); | |
1875 | params->ssids[i].ssid = n; | |
1876 | params->ssids[i].ssid_len = src->ssids[i].ssid_len; | |
1877 | } | |
1878 | } | |
1879 | params->num_ssids = src->num_ssids; | |
1880 | ||
1881 | if (src->extra_ies) { | |
1882 | n = os_malloc(src->extra_ies_len); | |
1883 | if (n == NULL) | |
1884 | goto failed; | |
1885 | os_memcpy(n, src->extra_ies, src->extra_ies_len); | |
1886 | params->extra_ies = n; | |
1887 | params->extra_ies_len = src->extra_ies_len; | |
1888 | } | |
1889 | ||
1890 | if (src->freqs) { | |
1891 | int len = int_array_len(src->freqs); | |
1892 | params->freqs = os_malloc((len + 1) * sizeof(int)); | |
1893 | if (params->freqs == NULL) | |
1894 | goto failed; | |
1895 | os_memcpy(params->freqs, src->freqs, (len + 1) * sizeof(int)); | |
1896 | } | |
1897 | ||
1898 | if (src->filter_ssids) { | |
fd67275b | 1899 | params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) * |
dd43aaa5 JM |
1900 | src->num_filter_ssids); |
1901 | if (params->filter_ssids == NULL) | |
1902 | goto failed; | |
1903 | os_memcpy(params->filter_ssids, src->filter_ssids, | |
fd67275b EL |
1904 | sizeof(*params->filter_ssids) * |
1905 | src->num_filter_ssids); | |
dd43aaa5 JM |
1906 | params->num_filter_ssids = src->num_filter_ssids; |
1907 | } | |
1908 | ||
1909 | params->filter_rssi = src->filter_rssi; | |
1910 | params->p2p_probe = src->p2p_probe; | |
1911 | params->only_new_results = src->only_new_results; | |
57a8f8af | 1912 | params->low_priority = src->low_priority; |
dd43aaa5 JM |
1913 | |
1914 | return params; | |
1915 | ||
1916 | failed: | |
1917 | wpa_scan_free_params(params); | |
1918 | return NULL; | |
1919 | } | |
1920 | ||
1921 | ||
1922 | void wpa_scan_free_params(struct wpa_driver_scan_params *params) | |
1923 | { | |
1924 | size_t i; | |
1925 | ||
1926 | if (params == NULL) | |
1927 | return; | |
1928 | ||
1929 | for (i = 0; i < params->num_ssids; i++) | |
1930 | os_free((u8 *) params->ssids[i].ssid); | |
1931 | os_free((u8 *) params->extra_ies); | |
1932 | os_free(params->freqs); | |
1933 | os_free(params->filter_ssids); | |
1934 | os_free(params); | |
1935 | } | |
737e7a08 AB |
1936 | |
1937 | ||
1938 | int wpas_start_pno(struct wpa_supplicant *wpa_s) | |
1939 | { | |
1940 | int ret, interval; | |
4ed34922 | 1941 | size_t i, num_ssid, num_match_ssid; |
737e7a08 AB |
1942 | struct wpa_ssid *ssid; |
1943 | struct wpa_driver_scan_params params; | |
1944 | ||
5e3ddf4d AB |
1945 | if (!wpa_s->sched_scan_supported) |
1946 | return -1; | |
1947 | ||
737e7a08 AB |
1948 | if (wpa_s->pno || wpa_s->pno_sched_pending) |
1949 | return 0; | |
1950 | ||
1951 | if ((wpa_s->wpa_state > WPA_SCANNING) && | |
1952 | (wpa_s->wpa_state <= WPA_COMPLETED)) { | |
1953 | wpa_printf(MSG_ERROR, "PNO: In assoc process"); | |
1954 | return -EAGAIN; | |
1955 | } | |
1956 | ||
1957 | if (wpa_s->wpa_state == WPA_SCANNING) { | |
1958 | wpa_supplicant_cancel_scan(wpa_s); | |
1959 | if (wpa_s->sched_scanning) { | |
1960 | wpa_printf(MSG_DEBUG, "Schedule PNO on completion of " | |
1961 | "ongoing sched scan"); | |
1962 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
1963 | wpa_s->pno_sched_pending = 1; | |
1964 | return 0; | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | os_memset(¶ms, 0, sizeof(params)); | |
1969 | ||
4ed34922 | 1970 | num_ssid = num_match_ssid = 0; |
737e7a08 AB |
1971 | ssid = wpa_s->conf->ssid; |
1972 | while (ssid) { | |
4ed34922 DS |
1973 | if (!wpas_network_disabled(wpa_s, ssid)) { |
1974 | num_match_ssid++; | |
1975 | if (ssid->scan_ssid) | |
1976 | num_ssid++; | |
1977 | } | |
737e7a08 AB |
1978 | ssid = ssid->next; |
1979 | } | |
4ed34922 DS |
1980 | |
1981 | if (num_match_ssid == 0) { | |
1982 | wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs"); | |
1983 | return -1; | |
1984 | } | |
1985 | ||
1986 | if (num_match_ssid > num_ssid) { | |
1987 | params.num_ssids++; /* wildcard */ | |
1988 | num_ssid++; | |
1989 | } | |
1990 | ||
737e7a08 AB |
1991 | if (num_ssid > WPAS_MAX_SCAN_SSIDS) { |
1992 | wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from " | |
1993 | "%u", WPAS_MAX_SCAN_SSIDS, (unsigned int) num_ssid); | |
1994 | num_ssid = WPAS_MAX_SCAN_SSIDS; | |
1995 | } | |
1996 | ||
4ed34922 DS |
1997 | if (num_match_ssid > wpa_s->max_match_sets) { |
1998 | num_match_ssid = wpa_s->max_match_sets; | |
1999 | wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match"); | |
737e7a08 | 2000 | } |
4ed34922 DS |
2001 | params.filter_ssids = os_calloc(num_match_ssid, |
2002 | sizeof(struct wpa_driver_scan_filter)); | |
737e7a08 AB |
2003 | if (params.filter_ssids == NULL) |
2004 | return -1; | |
2005 | i = 0; | |
2006 | ssid = wpa_s->conf->ssid; | |
2007 | while (ssid) { | |
2008 | if (!wpas_network_disabled(wpa_s, ssid)) { | |
4ed34922 DS |
2009 | if (ssid->scan_ssid && params.num_ssids < num_ssid) { |
2010 | params.ssids[params.num_ssids].ssid = | |
2011 | ssid->ssid; | |
2012 | params.ssids[params.num_ssids].ssid_len = | |
2013 | ssid->ssid_len; | |
2014 | params.num_ssids++; | |
2015 | } | |
737e7a08 AB |
2016 | os_memcpy(params.filter_ssids[i].ssid, ssid->ssid, |
2017 | ssid->ssid_len); | |
2018 | params.filter_ssids[i].ssid_len = ssid->ssid_len; | |
2019 | params.num_filter_ssids++; | |
2020 | i++; | |
4ed34922 | 2021 | if (i == num_match_ssid) |
737e7a08 AB |
2022 | break; |
2023 | } | |
2024 | ssid = ssid->next; | |
2025 | } | |
2026 | ||
2027 | if (wpa_s->conf->filter_rssi) | |
2028 | params.filter_rssi = wpa_s->conf->filter_rssi; | |
2029 | ||
2030 | interval = wpa_s->conf->sched_scan_interval ? | |
2031 | wpa_s->conf->sched_scan_interval : 10; | |
2032 | ||
d3c9c35f DS |
2033 | if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) { |
2034 | wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels"); | |
2035 | params.freqs = wpa_s->manual_sched_scan_freqs; | |
2036 | } | |
2037 | ||
737e7a08 AB |
2038 | ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms, interval); |
2039 | os_free(params.filter_ssids); | |
2040 | if (ret == 0) | |
2041 | wpa_s->pno = 1; | |
5e3ddf4d AB |
2042 | else |
2043 | wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO"); | |
737e7a08 AB |
2044 | return ret; |
2045 | } | |
2046 | ||
2047 | ||
2048 | int wpas_stop_pno(struct wpa_supplicant *wpa_s) | |
2049 | { | |
2050 | int ret = 0; | |
2051 | ||
5e3ddf4d AB |
2052 | if (!wpa_s->pno) |
2053 | return 0; | |
2054 | ||
2055 | ret = wpa_supplicant_stop_sched_scan(wpa_s); | |
737e7a08 | 2056 | |
5e3ddf4d | 2057 | wpa_s->pno = 0; |
737e7a08 AB |
2058 | wpa_s->pno_sched_pending = 0; |
2059 | ||
2060 | if (wpa_s->wpa_state == WPA_SCANNING) | |
2061 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
2062 | ||
2063 | return ret; | |
2064 | } |