]>
Commit | Line | Data |
---|---|---|
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" | |
fbca4c89 | 25 | #include "mesh.h" |
6fc6879b JM |
26 | |
27 | ||
28 | static void wpa_supplicant_gen_assoc_event(struct wpa_supplicant *wpa_s) | |
29 | { | |
30 | struct wpa_ssid *ssid; | |
31 | union wpa_event_data data; | |
32 | ||
33 | ssid = wpa_supplicant_get_ssid(wpa_s); | |
34 | if (ssid == NULL) | |
35 | return; | |
36 | ||
8bac466b | 37 | if (wpa_s->current_ssid == NULL) { |
6fc6879b | 38 | wpa_s->current_ssid = ssid; |
8bac466b JM |
39 | if (wpa_s->current_ssid != NULL) |
40 | wpas_notify_network_changed(wpa_s); | |
41 | } | |
6fc6879b | 42 | wpa_supplicant_initiate_eapol(wpa_s); |
f049052b BG |
43 | wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with a configured " |
44 | "network - generating associated event"); | |
6fc6879b JM |
45 | os_memset(&data, 0, sizeof(data)); |
46 | wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data); | |
47 | } | |
48 | ||
49 | ||
ad08c363 | 50 | #ifdef CONFIG_WPS |
5f738a21 | 51 | static int wpas_wps_in_use(struct wpa_supplicant *wpa_s, |
f90c86d4 | 52 | enum wps_request_type *req_type) |
ad08c363 JM |
53 | { |
54 | struct wpa_ssid *ssid; | |
55 | int wps = 0; | |
ad08c363 | 56 | |
5f738a21 | 57 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { |
ad08c363 JM |
58 | if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS)) |
59 | continue; | |
60 | ||
61 | wps = 1; | |
b01c18a8 | 62 | *req_type = wpas_wps_get_req_type(ssid); |
ad08c363 JM |
63 | if (!ssid->eap.phase1) |
64 | continue; | |
65 | ||
ad08c363 JM |
66 | if (os_strstr(ssid->eap.phase1, "pbc=1")) |
67 | return 2; | |
68 | } | |
69 | ||
5f738a21 | 70 | #ifdef CONFIG_P2P |
7a808c7e JM |
71 | if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p && |
72 | !wpa_s->conf->p2p_disabled) { | |
b21ff9cb JM |
73 | wpa_s->wps->dev.p2p = 1; |
74 | if (!wps) { | |
75 | wps = 1; | |
76 | *req_type = WPS_REQ_ENROLLEE_INFO; | |
77 | } | |
5f738a21 LC |
78 | } |
79 | #endif /* CONFIG_P2P */ | |
80 | ||
ad08c363 JM |
81 | return wps; |
82 | } | |
83 | #endif /* CONFIG_WPS */ | |
84 | ||
e76baaac | 85 | |
2c09af30 JM |
86 | /** |
87 | * wpa_supplicant_enabled_networks - Check whether there are enabled networks | |
88 | * @wpa_s: Pointer to wpa_supplicant data | |
89 | * Returns: 0 if no networks are enabled, >0 if networks are enabled | |
90 | * | |
91 | * This function is used to figure out whether any networks (or Interworking | |
92 | * with enabled credentials and auto_interworking) are present in the current | |
93 | * configuration. | |
94 | */ | |
349493bd | 95 | int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s) |
e76baaac | 96 | { |
349493bd | 97 | struct wpa_ssid *ssid = wpa_s->conf->ssid; |
d4534bde | 98 | int count = 0, disabled = 0; |
44b9ea5b JM |
99 | |
100 | if (wpa_s->p2p_mgmt) | |
101 | return 0; /* no normal network profiles on p2p_mgmt interface */ | |
102 | ||
e76baaac | 103 | while (ssid) { |
349493bd | 104 | if (!wpas_network_disabled(wpa_s, ssid)) |
5471c343 | 105 | count++; |
d4534bde JM |
106 | else |
107 | disabled++; | |
e76baaac JM |
108 | ssid = ssid->next; |
109 | } | |
4d5bda5f JM |
110 | if (wpa_s->conf->cred && wpa_s->conf->interworking && |
111 | wpa_s->conf->auto_interworking) | |
112 | count++; | |
d4534bde JM |
113 | if (count == 0 && disabled > 0) { |
114 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks (%d disabled " | |
115 | "networks)", disabled); | |
116 | } | |
5471c343 | 117 | return count; |
e76baaac JM |
118 | } |
119 | ||
120 | ||
121 | static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s, | |
122 | struct wpa_ssid *ssid) | |
123 | { | |
124 | while (ssid) { | |
349493bd | 125 | if (!wpas_network_disabled(wpa_s, ssid)) |
e76baaac JM |
126 | break; |
127 | ssid = ssid->next; | |
128 | } | |
129 | ||
130 | /* ap_scan=2 mode - try to associate with each SSID. */ | |
131 | if (ssid == NULL) { | |
f049052b BG |
132 | wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached " |
133 | "end of scan list - go back to beginning"); | |
ba2a573c | 134 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
135 | wpa_supplicant_req_scan(wpa_s, 0, 0); |
136 | return; | |
137 | } | |
138 | if (ssid->next) { | |
139 | /* Continue from the next SSID on the next attempt. */ | |
140 | wpa_s->prev_scan_ssid = ssid; | |
141 | } else { | |
142 | /* Start from the beginning of the SSID list. */ | |
ba2a573c | 143 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac JM |
144 | } |
145 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
146 | } | |
147 | ||
148 | ||
d12a51b5 | 149 | static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit) |
60b94c98 | 150 | { |
d12a51b5 JM |
151 | struct wpa_supplicant *wpa_s = work->wpa_s; |
152 | struct wpa_driver_scan_params *params = work->ctx; | |
60b94c98 JM |
153 | int ret; |
154 | ||
d12a51b5 | 155 | if (deinit) { |
b3253ebb AO |
156 | if (!work->started) { |
157 | wpa_scan_free_params(params); | |
158 | return; | |
159 | } | |
160 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
161 | wpas_notify_scan_done(wpa_s, 0); | |
162 | wpa_s->scan_work = NULL; | |
d12a51b5 JM |
163 | return; |
164 | } | |
165 | ||
c267753b JM |
166 | if (wpas_update_random_addr_disassoc(wpa_s) < 0) { |
167 | wpa_msg(wpa_s, MSG_INFO, | |
168 | "Failed to assign random MAC address for a scan"); | |
169 | radio_work_done(work); | |
170 | return; | |
171 | } | |
172 | ||
60b94c98 JM |
173 | wpa_supplicant_notify_scanning(wpa_s, 1); |
174 | ||
2dbe63ad JM |
175 | if (wpa_s->clear_driver_scan_cache) { |
176 | wpa_printf(MSG_DEBUG, | |
177 | "Request driver to clear scan cache due to local BSS flush"); | |
949938aa | 178 | params->only_new_results = 1; |
2dbe63ad | 179 | } |
17fbb751 | 180 | ret = wpa_drv_scan(wpa_s, params); |
d12a51b5 JM |
181 | wpa_scan_free_params(params); |
182 | work->ctx = NULL; | |
60b94c98 | 183 | if (ret) { |
2d9c99e3 JM |
184 | int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ; |
185 | ||
186 | if (wpa_s->disconnected) | |
187 | retry = 0; | |
188 | ||
60b94c98 JM |
189 | wpa_supplicant_notify_scanning(wpa_s, 0); |
190 | wpas_notify_scan_done(wpa_s, 0); | |
2d9c99e3 JM |
191 | if (wpa_s->wpa_state == WPA_SCANNING) |
192 | wpa_supplicant_set_state(wpa_s, | |
193 | wpa_s->scan_prev_wpa_state); | |
194 | wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_FAILED "ret=%d%s", | |
195 | ret, retry ? " retry=1" : ""); | |
d12a51b5 | 196 | radio_work_done(work); |
2d9c99e3 JM |
197 | |
198 | if (retry) { | |
199 | /* Restore scan_req since we will try to scan again */ | |
200 | wpa_s->scan_req = wpa_s->last_scan_req; | |
201 | wpa_supplicant_req_scan(wpa_s, 1, 0); | |
202 | } | |
d12a51b5 | 203 | return; |
0b7a25c0 | 204 | } |
60b94c98 | 205 | |
d12a51b5 JM |
206 | os_get_reltime(&wpa_s->scan_trigger_time); |
207 | wpa_s->scan_runs++; | |
208 | wpa_s->normal_scans++; | |
209 | wpa_s->own_scan_requested = 1; | |
210 | wpa_s->clear_driver_scan_cache = 0; | |
211 | wpa_s->scan_work = work; | |
212 | } | |
213 | ||
214 | ||
215 | /** | |
216 | * wpa_supplicant_trigger_scan - Request driver to start a scan | |
217 | * @wpa_s: Pointer to wpa_supplicant data | |
218 | * @params: Scan parameters | |
219 | * Returns: 0 on success, -1 on failure | |
220 | */ | |
221 | int wpa_supplicant_trigger_scan(struct wpa_supplicant *wpa_s, | |
222 | struct wpa_driver_scan_params *params) | |
223 | { | |
224 | struct wpa_driver_scan_params *ctx; | |
225 | ||
226 | if (wpa_s->scan_work) { | |
227 | wpa_dbg(wpa_s, MSG_INFO, "Reject scan trigger since one is already pending"); | |
228 | return -1; | |
229 | } | |
230 | ||
231 | ctx = wpa_scan_clone_params(params); | |
232 | if (ctx == NULL) | |
233 | return -1; | |
234 | ||
235 | if (radio_add_work(wpa_s, 0, "scan", 0, wpas_trigger_scan_cb, ctx) < 0) | |
236 | { | |
237 | wpa_scan_free_params(ctx); | |
238 | return -1; | |
239 | } | |
240 | ||
241 | return 0; | |
60b94c98 JM |
242 | } |
243 | ||
244 | ||
6a90053c LC |
245 | static void |
246 | wpa_supplicant_delayed_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
247 | { | |
248 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
249 | ||
250 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting delayed sched scan"); | |
251 | ||
252 | if (wpa_supplicant_req_sched_scan(wpa_s)) | |
253 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
254 | } | |
255 | ||
256 | ||
cbdf3507 LC |
257 | static void |
258 | wpa_supplicant_sched_scan_timeout(void *eloop_ctx, void *timeout_ctx) | |
259 | { | |
260 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
261 | ||
262 | wpa_dbg(wpa_s, MSG_DEBUG, "Sched scan timeout - stopping it"); | |
263 | ||
264 | wpa_s->sched_scan_timed_out = 1; | |
265 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
266 | } | |
267 | ||
268 | ||
f86d282f | 269 | int wpa_supplicant_start_sched_scan(struct wpa_supplicant *wpa_s, |
32c02261 | 270 | struct wpa_driver_scan_params *params) |
cbdf3507 LC |
271 | { |
272 | int ret; | |
273 | ||
cbdf3507 | 274 | wpa_supplicant_notify_scanning(wpa_s, 1); |
09ea4309 | 275 | ret = wpa_drv_sched_scan(wpa_s, params); |
cbdf3507 LC |
276 | if (ret) |
277 | wpa_supplicant_notify_scanning(wpa_s, 0); | |
278 | else | |
279 | wpa_s->sched_scanning = 1; | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
284 | ||
f86d282f | 285 | int wpa_supplicant_stop_sched_scan(struct wpa_supplicant *wpa_s) |
cbdf3507 LC |
286 | { |
287 | int ret; | |
288 | ||
289 | ret = wpa_drv_stop_sched_scan(wpa_s); | |
290 | if (ret) { | |
291 | wpa_dbg(wpa_s, MSG_DEBUG, "stopping sched_scan failed!"); | |
292 | /* TODO: what to do if stopping fails? */ | |
293 | return -1; | |
294 | } | |
295 | ||
296 | return ret; | |
297 | } | |
298 | ||
299 | ||
3812464c JM |
300 | static struct wpa_driver_scan_filter * |
301 | wpa_supplicant_build_filter_ssids(struct wpa_config *conf, size_t *num_ssids) | |
302 | { | |
303 | struct wpa_driver_scan_filter *ssids; | |
304 | struct wpa_ssid *ssid; | |
305 | size_t count; | |
306 | ||
307 | *num_ssids = 0; | |
308 | if (!conf->filter_ssids) | |
309 | return NULL; | |
310 | ||
311 | for (count = 0, ssid = conf->ssid; ssid; ssid = ssid->next) { | |
312 | if (ssid->ssid && ssid->ssid_len) | |
313 | count++; | |
314 | } | |
315 | if (count == 0) | |
316 | return NULL; | |
faebdeaa | 317 | ssids = os_calloc(count, sizeof(struct wpa_driver_scan_filter)); |
3812464c JM |
318 | if (ssids == NULL) |
319 | return NULL; | |
320 | ||
321 | for (ssid = conf->ssid; ssid; ssid = ssid->next) { | |
322 | if (!ssid->ssid || !ssid->ssid_len) | |
323 | continue; | |
324 | os_memcpy(ssids[*num_ssids].ssid, ssid->ssid, ssid->ssid_len); | |
325 | ssids[*num_ssids].ssid_len = ssid->ssid_len; | |
326 | (*num_ssids)++; | |
327 | } | |
328 | ||
329 | return ssids; | |
330 | } | |
331 | ||
332 | ||
5f738a21 LC |
333 | static void wpa_supplicant_optimize_freqs( |
334 | struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) | |
335 | { | |
336 | #ifdef CONFIG_P2P | |
337 | if (params->freqs == NULL && wpa_s->p2p_in_provisioning && | |
338 | wpa_s->go_params) { | |
339 | /* Optimize provisioning state scan based on GO information */ | |
340 | if (wpa_s->p2p_in_provisioning < 5 && | |
341 | wpa_s->go_params->freq > 0) { | |
342 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO " | |
343 | "preferred frequency %d MHz", | |
344 | wpa_s->go_params->freq); | |
faebdeaa | 345 | params->freqs = os_calloc(2, sizeof(int)); |
5f738a21 LC |
346 | if (params->freqs) |
347 | params->freqs[0] = wpa_s->go_params->freq; | |
348 | } else if (wpa_s->p2p_in_provisioning < 8 && | |
349 | wpa_s->go_params->freq_list[0]) { | |
350 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only common " | |
351 | "channels"); | |
352 | int_array_concat(¶ms->freqs, | |
353 | wpa_s->go_params->freq_list); | |
354 | if (params->freqs) | |
355 | int_array_sort_unique(params->freqs); | |
356 | } | |
357 | wpa_s->p2p_in_provisioning++; | |
358 | } | |
41d5ce9e RR |
359 | |
360 | if (params->freqs == NULL && wpa_s->p2p_in_invitation) { | |
361 | /* | |
362 | * Optimize scan based on GO information during persistent | |
363 | * group reinvocation | |
364 | */ | |
28fa4eb2 | 365 | if (wpa_s->p2p_in_invitation < 5 && |
41d5ce9e RR |
366 | wpa_s->p2p_invite_go_freq > 0) { |
367 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Scan only GO preferred frequency %d MHz during invitation", | |
368 | wpa_s->p2p_invite_go_freq); | |
faebdeaa | 369 | params->freqs = os_calloc(2, sizeof(int)); |
41d5ce9e RR |
370 | if (params->freqs) |
371 | params->freqs[0] = wpa_s->p2p_invite_go_freq; | |
372 | } | |
373 | wpa_s->p2p_in_invitation++; | |
374 | if (wpa_s->p2p_in_invitation > 20) { | |
375 | /* | |
376 | * This should not really happen since the variable is | |
377 | * cleared on group removal, but if it does happen, make | |
378 | * sure we do not get stuck in special invitation scan | |
379 | * mode. | |
380 | */ | |
381 | wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Clear p2p_in_invitation"); | |
382 | wpa_s->p2p_in_invitation = 0; | |
383 | } | |
384 | } | |
5f738a21 LC |
385 | #endif /* CONFIG_P2P */ |
386 | ||
387 | #ifdef CONFIG_WPS | |
388 | if (params->freqs == NULL && wpa_s->after_wps && wpa_s->wps_freq) { | |
389 | /* | |
390 | * Optimize post-provisioning scan based on channel used | |
391 | * during provisioning. | |
392 | */ | |
393 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz " | |
394 | "that was used during provisioning", wpa_s->wps_freq); | |
faebdeaa | 395 | params->freqs = os_calloc(2, sizeof(int)); |
5f738a21 LC |
396 | if (params->freqs) |
397 | params->freqs[0] = wpa_s->wps_freq; | |
398 | wpa_s->after_wps--; | |
662b40b1 JM |
399 | } else if (wpa_s->after_wps) |
400 | wpa_s->after_wps--; | |
5f738a21 | 401 | |
1e7fb4f1 JM |
402 | if (params->freqs == NULL && wpa_s->known_wps_freq && wpa_s->wps_freq) |
403 | { | |
404 | /* Optimize provisioning scan based on already known channel */ | |
405 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Scan only frequency %u MHz", | |
406 | wpa_s->wps_freq); | |
faebdeaa | 407 | params->freqs = os_calloc(2, sizeof(int)); |
1e7fb4f1 JM |
408 | if (params->freqs) |
409 | params->freqs[0] = wpa_s->wps_freq; | |
410 | wpa_s->known_wps_freq = 0; /* only do this once */ | |
411 | } | |
5f738a21 LC |
412 | #endif /* CONFIG_WPS */ |
413 | } | |
414 | ||
415 | ||
46ee0427 JM |
416 | #ifdef CONFIG_INTERWORKING |
417 | static void wpas_add_interworking_elements(struct wpa_supplicant *wpa_s, | |
418 | struct wpabuf *buf) | |
419 | { | |
46ee0427 JM |
420 | wpabuf_put_u8(buf, WLAN_EID_INTERWORKING); |
421 | wpabuf_put_u8(buf, is_zero_ether_addr(wpa_s->conf->hessid) ? 1 : | |
422 | 1 + ETH_ALEN); | |
11540c0b | 423 | wpabuf_put_u8(buf, wpa_s->conf->access_network_type); |
46ee0427 JM |
424 | /* No Venue Info */ |
425 | if (!is_zero_ether_addr(wpa_s->conf->hessid)) | |
426 | wpabuf_put_data(buf, wpa_s->conf->hessid, ETH_ALEN); | |
427 | } | |
428 | #endif /* CONFIG_INTERWORKING */ | |
429 | ||
430 | ||
a13e07ec | 431 | static struct wpabuf * wpa_supplicant_extra_ies(struct wpa_supplicant *wpa_s) |
6fc6879b | 432 | { |
46ee0427 | 433 | struct wpabuf *extra_ie = NULL; |
ad443097 IP |
434 | u8 ext_capab[18]; |
435 | int ext_capab_len; | |
b01c18a8 | 436 | #ifdef CONFIG_WPS |
509a3972 | 437 | int wps = 0; |
f90c86d4 | 438 | enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO; |
46ee0427 JM |
439 | #endif /* CONFIG_WPS */ |
440 | ||
ad443097 IP |
441 | ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, |
442 | sizeof(ext_capab)); | |
443 | if (ext_capab_len > 0 && | |
444 | wpabuf_resize(&extra_ie, ext_capab_len) == 0) | |
445 | wpabuf_put_data(extra_ie, ext_capab, ext_capab_len); | |
446 | ||
46ee0427 JM |
447 | #ifdef CONFIG_INTERWORKING |
448 | if (wpa_s->conf->interworking && | |
449 | wpabuf_resize(&extra_ie, 100) == 0) | |
450 | wpas_add_interworking_elements(wpa_s, extra_ie); | |
451 | #endif /* CONFIG_INTERWORKING */ | |
5f738a21 | 452 | |
46ee0427 | 453 | #ifdef CONFIG_WPS |
5f738a21 LC |
454 | wps = wpas_wps_in_use(wpa_s, &req_type); |
455 | ||
456 | if (wps) { | |
46ee0427 | 457 | struct wpabuf *wps_ie; |
360182ed JM |
458 | wps_ie = wps_build_probe_req_ie(wps == 2 ? DEV_PW_PUSHBUTTON : |
459 | DEV_PW_DEFAULT, | |
460 | &wpa_s->wps->dev, | |
5f738a21 LC |
461 | wpa_s->wps->uuid, req_type, |
462 | 0, NULL); | |
463 | if (wps_ie) { | |
46ee0427 JM |
464 | if (wpabuf_resize(&extra_ie, wpabuf_len(wps_ie)) == 0) |
465 | wpabuf_put_buf(extra_ie, wps_ie); | |
466 | wpabuf_free(wps_ie); | |
5f738a21 LC |
467 | } |
468 | } | |
469 | ||
470 | #ifdef CONFIG_P2P | |
46ee0427 | 471 | if (wps) { |
5f738a21 | 472 | size_t ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); |
46ee0427 JM |
473 | if (wpabuf_resize(&extra_ie, ielen) == 0) |
474 | wpas_p2p_scan_ie(wpa_s, extra_ie); | |
5f738a21 LC |
475 | } |
476 | #endif /* CONFIG_P2P */ | |
477 | ||
fbca4c89 JA |
478 | wpa_supplicant_mesh_add_scan_ie(wpa_s, &extra_ie); |
479 | ||
b01c18a8 | 480 | #endif /* CONFIG_WPS */ |
5f738a21 | 481 | |
0f105f9e JM |
482 | #ifdef CONFIG_HS20 |
483 | if (wpa_s->conf->hs20 && wpabuf_resize(&extra_ie, 7) == 0) | |
f9cd147d | 484 | wpas_hs20_add_indication(extra_ie, -1); |
0f105f9e JM |
485 | #endif /* CONFIG_HS20 */ |
486 | ||
b36a3a65 AN |
487 | #ifdef CONFIG_FST |
488 | if (wpa_s->fst_ies && | |
489 | wpabuf_resize(&extra_ie, wpabuf_len(wpa_s->fst_ies)) == 0) | |
490 | wpabuf_put_buf(extra_ie, wpa_s->fst_ies); | |
491 | #endif /* CONFIG_FST */ | |
492 | ||
46ee0427 | 493 | return extra_ie; |
5f738a21 LC |
494 | } |
495 | ||
496 | ||
5cc70322 JM |
497 | #ifdef CONFIG_P2P |
498 | ||
499 | /* | |
500 | * Check whether there are any enabled networks or credentials that could be | |
501 | * used for a non-P2P connection. | |
502 | */ | |
503 | static int non_p2p_network_enabled(struct wpa_supplicant *wpa_s) | |
504 | { | |
505 | struct wpa_ssid *ssid; | |
506 | ||
507 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
508 | if (wpas_network_disabled(wpa_s, ssid)) | |
509 | continue; | |
510 | if (!ssid->p2p_group) | |
511 | return 1; | |
512 | } | |
513 | ||
514 | if (wpa_s->conf->cred && wpa_s->conf->interworking && | |
515 | wpa_s->conf->auto_interworking) | |
516 | return 1; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
6124e858 | 521 | #endif /* CONFIG_P2P */ |
5cc70322 | 522 | |
5cc70322 | 523 | |
faf9a858 JM |
524 | static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s, |
525 | enum hostapd_hw_mode band, | |
526 | struct wpa_driver_scan_params *params) | |
527 | { | |
528 | /* Include only supported channels for the specified band */ | |
529 | struct hostapd_hw_modes *mode; | |
530 | int count, i; | |
531 | ||
532 | mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band); | |
533 | if (mode == NULL) { | |
534 | /* No channels supported in this band - use empty list */ | |
535 | params->freqs = os_zalloc(sizeof(int)); | |
536 | return; | |
537 | } | |
538 | ||
faebdeaa | 539 | params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); |
faf9a858 JM |
540 | if (params->freqs == NULL) |
541 | return; | |
542 | for (count = 0, i = 0; i < mode->num_channels; i++) { | |
543 | if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) | |
544 | continue; | |
545 | params->freqs[count++] = mode->channels[i].freq; | |
546 | } | |
547 | } | |
548 | ||
549 | ||
550 | static void wpa_setband_scan_freqs(struct wpa_supplicant *wpa_s, | |
551 | struct wpa_driver_scan_params *params) | |
552 | { | |
553 | if (wpa_s->hw.modes == NULL) | |
554 | return; /* unknown what channels the driver supports */ | |
555 | if (params->freqs) | |
556 | return; /* already using a limited channel set */ | |
557 | if (wpa_s->setband == WPA_SETBAND_5G) | |
558 | wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211A, | |
559 | params); | |
560 | else if (wpa_s->setband == WPA_SETBAND_2G) | |
561 | wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, | |
562 | params); | |
563 | } | |
564 | ||
565 | ||
6891f0e6 LJ |
566 | static void wpa_set_scan_ssids(struct wpa_supplicant *wpa_s, |
567 | struct wpa_driver_scan_params *params, | |
568 | size_t max_ssids) | |
569 | { | |
570 | unsigned int i; | |
571 | struct wpa_ssid *ssid; | |
572 | ||
573 | for (i = 0; i < wpa_s->scan_id_count; i++) { | |
574 | unsigned int j; | |
575 | ||
576 | ssid = wpa_config_get_network(wpa_s->conf, wpa_s->scan_id[i]); | |
577 | if (!ssid || !ssid->scan_ssid) | |
578 | continue; | |
579 | ||
580 | for (j = 0; j < params->num_ssids; j++) { | |
581 | if (params->ssids[j].ssid_len == ssid->ssid_len && | |
582 | params->ssids[j].ssid && | |
583 | os_memcmp(params->ssids[j].ssid, ssid->ssid, | |
584 | ssid->ssid_len) == 0) | |
585 | break; | |
586 | } | |
587 | if (j < params->num_ssids) | |
588 | continue; /* already in the list */ | |
589 | ||
590 | if (params->num_ssids + 1 > max_ssids) { | |
591 | wpa_printf(MSG_DEBUG, | |
592 | "Over max scan SSIDs for manual request"); | |
593 | break; | |
594 | } | |
595 | ||
596 | wpa_printf(MSG_DEBUG, "Scan SSID (manual request): %s", | |
597 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
598 | params->ssids[params->num_ssids].ssid = ssid->ssid; | |
599 | params->ssids[params->num_ssids].ssid_len = ssid->ssid_len; | |
600 | params->num_ssids++; | |
601 | } | |
602 | ||
603 | wpa_s->scan_id_count = 0; | |
604 | } | |
605 | ||
606 | ||
a80651d0 KV |
607 | static int wpa_set_ssids_from_scan_req(struct wpa_supplicant *wpa_s, |
608 | struct wpa_driver_scan_params *params, | |
609 | size_t max_ssids) | |
610 | { | |
611 | unsigned int i; | |
612 | ||
613 | if (wpa_s->ssids_from_scan_req == NULL || | |
614 | wpa_s->num_ssids_from_scan_req == 0) | |
615 | return 0; | |
616 | ||
617 | if (wpa_s->num_ssids_from_scan_req > max_ssids) { | |
618 | wpa_s->num_ssids_from_scan_req = max_ssids; | |
619 | wpa_printf(MSG_DEBUG, "Over max scan SSIDs from scan req: %u", | |
620 | (unsigned int) max_ssids); | |
621 | } | |
622 | ||
623 | for (i = 0; i < wpa_s->num_ssids_from_scan_req; i++) { | |
624 | params->ssids[i].ssid = wpa_s->ssids_from_scan_req[i].ssid; | |
625 | params->ssids[i].ssid_len = | |
626 | wpa_s->ssids_from_scan_req[i].ssid_len; | |
627 | wpa_hexdump_ascii(MSG_DEBUG, "specific SSID", | |
628 | params->ssids[i].ssid, | |
629 | params->ssids[i].ssid_len); | |
630 | } | |
631 | ||
632 | params->num_ssids = wpa_s->num_ssids_from_scan_req; | |
633 | wpa_s->num_ssids_from_scan_req = 0; | |
634 | return 1; | |
635 | } | |
636 | ||
637 | ||
5f738a21 LC |
638 | static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx) |
639 | { | |
640 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
641 | struct wpa_ssid *ssid; | |
49e3eea8 | 642 | int ret, p2p_in_prog; |
b9b12d02 | 643 | struct wpabuf *extra_ie = NULL; |
e76baaac | 644 | struct wpa_driver_scan_params params; |
7c865c68 | 645 | struct wpa_driver_scan_params *scan_params; |
e76baaac | 646 | size_t max_ssids; |
3f9ebc43 | 647 | int connect_without_scan = 0; |
6fc6879b | 648 | |
cf70d298 | 649 | if (wpa_s->pno || wpa_s->pno_sched_pending) { |
dd271857 RM |
650 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - PNO is in progress"); |
651 | return; | |
652 | } | |
653 | ||
8401a6b0 | 654 | if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { |
f049052b | 655 | wpa_dbg(wpa_s, MSG_DEBUG, "Skip scan - interface disabled"); |
8401a6b0 JM |
656 | return; |
657 | } | |
658 | ||
4115303b | 659 | if (wpa_s->disconnected && wpa_s->scan_req == NORMAL_SCAN_REQ) { |
ac06fb12 | 660 | wpa_dbg(wpa_s, MSG_DEBUG, "Disconnected - do not scan"); |
3180d7a2 | 661 | wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); |
6fc6879b | 662 | return; |
3180d7a2 | 663 | } |
6fc6879b | 664 | |
f86d282f JJ |
665 | if (wpa_s->scanning) { |
666 | /* | |
667 | * If we are already in scanning state, we shall reschedule the | |
668 | * the incoming scan request. | |
669 | */ | |
670 | wpa_dbg(wpa_s, MSG_DEBUG, "Already scanning - Reschedule the incoming scan req"); | |
671 | wpa_supplicant_req_scan(wpa_s, 1, 0); | |
672 | return; | |
673 | } | |
674 | ||
349493bd | 675 | if (!wpa_supplicant_enabled_networks(wpa_s) && |
4115303b | 676 | wpa_s->scan_req == NORMAL_SCAN_REQ) { |
f049052b | 677 | wpa_dbg(wpa_s, MSG_DEBUG, "No enabled networks - do not scan"); |
6fc6879b JM |
678 | wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); |
679 | return; | |
680 | } | |
6fc6879b | 681 | |
c2a04078 JM |
682 | if (wpa_s->conf->ap_scan != 0 && |
683 | (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) { | |
f049052b BG |
684 | wpa_dbg(wpa_s, MSG_DEBUG, "Using wired authentication - " |
685 | "overriding ap_scan configuration"); | |
6fc6879b | 686 | wpa_s->conf->ap_scan = 0; |
8bac466b | 687 | wpas_notify_ap_scan_changed(wpa_s); |
6fc6879b JM |
688 | } |
689 | ||
690 | if (wpa_s->conf->ap_scan == 0) { | |
691 | wpa_supplicant_gen_assoc_event(wpa_s); | |
692 | return; | |
693 | } | |
694 | ||
3f9ebc43 | 695 | ssid = NULL; |
a51c40aa | 696 | if (wpa_s->scan_req != MANUAL_SCAN_REQ && |
3f9ebc43 JM |
697 | wpa_s->connect_without_scan) { |
698 | connect_without_scan = 1; | |
699 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
700 | if (ssid == wpa_s->connect_without_scan) | |
701 | break; | |
702 | } | |
703 | } | |
704 | ||
49e3eea8 | 705 | p2p_in_prog = wpas_p2p_in_progress(wpa_s); |
3f9ebc43 JM |
706 | if (p2p_in_prog && p2p_in_prog != 2 && |
707 | (!ssid || | |
708 | (ssid->mode != WPAS_MODE_AP && ssid->mode != WPAS_MODE_P2P_GO))) { | |
1b5d4714 JM |
709 | wpa_dbg(wpa_s, MSG_DEBUG, "Delay station mode scan while P2P operation is in progress"); |
710 | wpa_supplicant_req_scan(wpa_s, 5, 0); | |
711 | return; | |
303f60d3 | 712 | } |
303f60d3 | 713 | |
17fbb751 | 714 | if (wpa_s->conf->ap_scan == 2) |
e76baaac JM |
715 | max_ssids = 1; |
716 | else { | |
717 | max_ssids = wpa_s->max_scan_ssids; | |
718 | if (max_ssids > WPAS_MAX_SCAN_SSIDS) | |
719 | max_ssids = WPAS_MAX_SCAN_SSIDS; | |
720 | } | |
721 | ||
12455031 | 722 | wpa_s->last_scan_req = wpa_s->scan_req; |
4115303b | 723 | wpa_s->scan_req = NORMAL_SCAN_REQ; |
e76baaac | 724 | |
3f9ebc43 JM |
725 | if (connect_without_scan) { |
726 | wpa_s->connect_without_scan = NULL; | |
727 | if (ssid) { | |
728 | wpa_printf(MSG_DEBUG, "Start a pre-selected network " | |
729 | "without scan step"); | |
730 | wpa_supplicant_associate(wpa_s, NULL, ssid); | |
731 | return; | |
732 | } | |
733 | } | |
734 | ||
e76baaac JM |
735 | os_memset(¶ms, 0, sizeof(params)); |
736 | ||
2d9c99e3 | 737 | wpa_s->scan_prev_wpa_state = wpa_s->wpa_state; |
6fc6879b JM |
738 | if (wpa_s->wpa_state == WPA_DISCONNECTED || |
739 | wpa_s->wpa_state == WPA_INACTIVE) | |
740 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
741 | ||
7c865c68 TB |
742 | /* |
743 | * If autoscan has set its own scanning parameters | |
744 | */ | |
745 | if (wpa_s->autoscan_params != NULL) { | |
746 | scan_params = wpa_s->autoscan_params; | |
747 | goto scan; | |
748 | } | |
749 | ||
a80651d0 KV |
750 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
751 | wpa_set_ssids_from_scan_req(wpa_s, ¶ms, max_ssids)) { | |
752 | wpa_printf(MSG_DEBUG, "Use specific SSIDs from SCAN command"); | |
753 | goto ssid_list_set; | |
754 | } | |
755 | ||
a21c05db | 756 | #ifdef CONFIG_P2P |
85ea132a | 757 | if ((wpa_s->p2p_in_provisioning || wpa_s->show_group_started) && |
c35e35ed | 758 | wpa_s->go_params && !wpa_s->conf->passive_scan) { |
9100b660 JM |
759 | wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during P2P group formation (p2p_in_provisioning=%d show_group_started=%d)", |
760 | wpa_s->p2p_in_provisioning, | |
761 | wpa_s->show_group_started); | |
a21c05db JM |
762 | params.ssids[0].ssid = wpa_s->go_params->ssid; |
763 | params.ssids[0].ssid_len = wpa_s->go_params->ssid_len; | |
764 | params.num_ssids = 1; | |
765 | goto ssid_list_set; | |
766 | } | |
41d5ce9e RR |
767 | |
768 | if (wpa_s->p2p_in_invitation) { | |
769 | if (wpa_s->current_ssid) { | |
770 | wpa_printf(MSG_DEBUG, "P2P: Use specific SSID for scan during invitation"); | |
771 | params.ssids[0].ssid = wpa_s->current_ssid->ssid; | |
772 | params.ssids[0].ssid_len = | |
773 | wpa_s->current_ssid->ssid_len; | |
774 | params.num_ssids = 1; | |
775 | } else { | |
776 | wpa_printf(MSG_DEBUG, "P2P: No specific SSID known for scan during invitation"); | |
777 | } | |
778 | goto ssid_list_set; | |
779 | } | |
a21c05db JM |
780 | #endif /* CONFIG_P2P */ |
781 | ||
e76baaac | 782 | /* Find the starting point from which to continue scanning */ |
6fc6879b | 783 | ssid = wpa_s->conf->ssid; |
ba2a573c | 784 | if (wpa_s->prev_scan_ssid != WILDCARD_SSID_SCAN) { |
6fc6879b JM |
785 | while (ssid) { |
786 | if (ssid == wpa_s->prev_scan_ssid) { | |
787 | ssid = ssid->next; | |
788 | break; | |
789 | } | |
790 | ssid = ssid->next; | |
791 | } | |
792 | } | |
6fc6879b | 793 | |
12455031 | 794 | if (wpa_s->last_scan_req != MANUAL_SCAN_REQ && |
0a34b62b JM |
795 | #ifdef CONFIG_AP |
796 | !wpa_s->ap_iface && | |
797 | #endif /* CONFIG_AP */ | |
12455031 | 798 | wpa_s->conf->ap_scan == 2) { |
7dcdcfd6 | 799 | wpa_s->connect_without_scan = NULL; |
b3aa456b | 800 | wpa_s->prev_scan_wildcard = 0; |
e76baaac JM |
801 | wpa_supplicant_assoc_try(wpa_s, ssid); |
802 | return; | |
803 | } else if (wpa_s->conf->ap_scan == 2) { | |
6fc6879b | 804 | /* |
ba2a573c JM |
805 | * User-initiated scan request in ap_scan == 2; scan with |
806 | * wildcard SSID. | |
6fc6879b | 807 | */ |
e76baaac | 808 | ssid = NULL; |
0f44ec8e PQ |
809 | } else if (wpa_s->reattach && wpa_s->current_ssid != NULL) { |
810 | /* | |
811 | * Perform single-channel single-SSID scan for | |
812 | * reassociate-to-same-BSS operation. | |
813 | */ | |
814 | /* Setup SSID */ | |
815 | ssid = wpa_s->current_ssid; | |
816 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", | |
817 | ssid->ssid, ssid->ssid_len); | |
818 | params.ssids[0].ssid = ssid->ssid; | |
819 | params.ssids[0].ssid_len = ssid->ssid_len; | |
820 | params.num_ssids = 1; | |
821 | ||
822 | /* | |
823 | * Allocate memory for frequency array, allocate one extra | |
824 | * slot for the zero-terminator. | |
825 | */ | |
826 | params.freqs = os_malloc(sizeof(int) * 2); | |
827 | if (params.freqs == NULL) { | |
828 | wpa_dbg(wpa_s, MSG_ERROR, "Memory allocation failed"); | |
829 | return; | |
830 | } | |
831 | params.freqs[0] = wpa_s->assoc_freq; | |
832 | params.freqs[1] = 0; | |
833 | ||
834 | /* | |
835 | * Reset the reattach flag so that we fall back to full scan if | |
836 | * this scan fails. | |
837 | */ | |
838 | wpa_s->reattach = 0; | |
e76baaac | 839 | } else { |
5be45e2e | 840 | struct wpa_ssid *start = ssid, *tssid; |
d3a98225 | 841 | int freqs_set = 0; |
e76baaac JM |
842 | if (ssid == NULL && max_ssids > 1) |
843 | ssid = wpa_s->conf->ssid; | |
844 | while (ssid) { | |
349493bd JM |
845 | if (!wpas_network_disabled(wpa_s, ssid) && |
846 | ssid->scan_ssid) { | |
e76baaac JM |
847 | wpa_hexdump_ascii(MSG_DEBUG, "Scan SSID", |
848 | ssid->ssid, ssid->ssid_len); | |
849 | params.ssids[params.num_ssids].ssid = | |
850 | ssid->ssid; | |
851 | params.ssids[params.num_ssids].ssid_len = | |
852 | ssid->ssid_len; | |
853 | params.num_ssids++; | |
854 | if (params.num_ssids + 1 >= max_ssids) | |
855 | break; | |
856 | } | |
857 | ssid = ssid->next; | |
858 | if (ssid == start) | |
859 | break; | |
860 | if (ssid == NULL && max_ssids > 1 && | |
861 | start != wpa_s->conf->ssid) | |
862 | ssid = wpa_s->conf->ssid; | |
6fc6879b | 863 | } |
d3a98225 | 864 | |
6891f0e6 LJ |
865 | if (wpa_s->scan_id_count && |
866 | wpa_s->last_scan_req == MANUAL_SCAN_REQ) | |
867 | wpa_set_scan_ssids(wpa_s, ¶ms, max_ssids); | |
868 | ||
0855e2e1 JM |
869 | for (tssid = wpa_s->conf->ssid; |
870 | wpa_s->last_scan_req != MANUAL_SCAN_REQ && tssid; | |
871 | tssid = tssid->next) { | |
349493bd | 872 | if (wpas_network_disabled(wpa_s, tssid)) |
d3a98225 | 873 | continue; |
5be45e2e | 874 | if ((params.freqs || !freqs_set) && tssid->scan_freq) { |
d3a98225 | 875 | int_array_concat(¶ms.freqs, |
5be45e2e | 876 | tssid->scan_freq); |
d3a98225 JM |
877 | } else { |
878 | os_free(params.freqs); | |
879 | params.freqs = NULL; | |
880 | } | |
881 | freqs_set = 1; | |
882 | } | |
883 | int_array_sort_unique(params.freqs); | |
6fc6879b JM |
884 | } |
885 | ||
b3aa456b ES |
886 | if (ssid && max_ssids == 1) { |
887 | /* | |
888 | * If the driver is limited to 1 SSID at a time interleave | |
889 | * wildcard SSID scans with specific SSID scans to avoid | |
890 | * waiting a long time for a wildcard scan. | |
891 | */ | |
892 | if (!wpa_s->prev_scan_wildcard) { | |
893 | params.ssids[0].ssid = NULL; | |
894 | params.ssids[0].ssid_len = 0; | |
895 | wpa_s->prev_scan_wildcard = 1; | |
896 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for " | |
897 | "wildcard SSID (Interleave with specific)"); | |
898 | } else { | |
899 | wpa_s->prev_scan_ssid = ssid; | |
900 | wpa_s->prev_scan_wildcard = 0; | |
901 | wpa_dbg(wpa_s, MSG_DEBUG, | |
902 | "Starting AP scan for specific SSID: %s", | |
903 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
e76baaac | 904 | } |
b3aa456b ES |
905 | } else if (ssid) { |
906 | /* max_ssids > 1 */ | |
907 | ||
908 | wpa_s->prev_scan_ssid = ssid; | |
909 | wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in " | |
910 | "the scan request"); | |
911 | params.num_ssids++; | |
88c2d488 JM |
912 | } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
913 | wpa_s->manual_scan_passive && params.num_ssids == 0) { | |
914 | wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request"); | |
c35e35ed JM |
915 | } else if (wpa_s->conf->passive_scan) { |
916 | wpa_dbg(wpa_s, MSG_DEBUG, | |
917 | "Use passive scan based on configuration"); | |
e76baaac | 918 | } else { |
ba2a573c | 919 | wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; |
e76baaac | 920 | params.num_ssids++; |
f049052b BG |
921 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting AP scan for wildcard " |
922 | "SSID"); | |
6fc6879b JM |
923 | } |
924 | ||
a80651d0 | 925 | ssid_list_set: |
5f738a21 | 926 | wpa_supplicant_optimize_freqs(wpa_s, ¶ms); |
a13e07ec | 927 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
0e65037c | 928 | |
949938aa | 929 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
2dbe63ad JM |
930 | wpa_s->manual_scan_only_new) { |
931 | wpa_printf(MSG_DEBUG, | |
932 | "Request driver to clear scan cache due to manual only_new=1 scan"); | |
949938aa | 933 | params.only_new_results = 1; |
2dbe63ad | 934 | } |
949938aa | 935 | |
fee52342 JM |
936 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs == NULL && |
937 | wpa_s->manual_scan_freqs) { | |
938 | wpa_dbg(wpa_s, MSG_DEBUG, "Limit manual scan to specified channels"); | |
939 | params.freqs = wpa_s->manual_scan_freqs; | |
940 | wpa_s->manual_scan_freqs = NULL; | |
941 | } | |
942 | ||
f47d639d | 943 | if (params.freqs == NULL && wpa_s->next_scan_freqs) { |
f049052b BG |
944 | wpa_dbg(wpa_s, MSG_DEBUG, "Optimize scan based on previously " |
945 | "generated frequency list"); | |
f47d639d JM |
946 | params.freqs = wpa_s->next_scan_freqs; |
947 | } else | |
948 | os_free(wpa_s->next_scan_freqs); | |
949 | wpa_s->next_scan_freqs = NULL; | |
faf9a858 | 950 | wpa_setband_scan_freqs(wpa_s, ¶ms); |
f47d639d | 951 | |
f5ffc348 BG |
952 | /* See if user specified frequencies. If so, scan only those. */ |
953 | if (wpa_s->conf->freq_list && !params.freqs) { | |
954 | wpa_dbg(wpa_s, MSG_DEBUG, | |
955 | "Optimize scan based on conf->freq_list"); | |
956 | int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); | |
957 | } | |
958 | ||
6124e858 BG |
959 | /* Use current associated channel? */ |
960 | if (wpa_s->conf->scan_cur_freq && !params.freqs) { | |
53c5dfc2 IP |
961 | unsigned int num = wpa_s->num_multichan_concurrent; |
962 | ||
963 | params.freqs = os_calloc(num + 1, sizeof(int)); | |
964 | if (params.freqs) { | |
965 | num = get_shared_radio_freqs(wpa_s, params.freqs, num); | |
966 | if (num > 0) { | |
967 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the " | |
968 | "current operating channels since " | |
969 | "scan_cur_freq is enabled"); | |
970 | } else { | |
971 | os_free(params.freqs); | |
972 | params.freqs = NULL; | |
973 | } | |
6124e858 BG |
974 | } |
975 | } | |
976 | ||
3812464c JM |
977 | params.filter_ssids = wpa_supplicant_build_filter_ssids( |
978 | wpa_s->conf, ¶ms.num_filter_ssids); | |
46ee0427 JM |
979 | if (extra_ie) { |
980 | params.extra_ies = wpabuf_head(extra_ie); | |
981 | params.extra_ies_len = wpabuf_len(extra_ie); | |
982 | } | |
3812464c | 983 | |
d1dd48e3 | 984 | #ifdef CONFIG_P2P |
8235f89f | 985 | if (wpa_s->p2p_in_provisioning || wpa_s->p2p_in_invitation || |
85ea132a | 986 | (wpa_s->show_group_started && wpa_s->go_params)) { |
d1dd48e3 JM |
987 | /* |
988 | * The interface may not yet be in P2P mode, so we have to | |
989 | * explicitly request P2P probe to disable CCK rates. | |
990 | */ | |
991 | params.p2p_probe = 1; | |
992 | } | |
993 | #endif /* CONFIG_P2P */ | |
994 | ||
56c76fa5 IP |
995 | if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCAN) { |
996 | params.mac_addr_rand = 1; | |
997 | if (wpa_s->mac_addr_scan) { | |
998 | params.mac_addr = wpa_s->mac_addr_scan; | |
999 | params.mac_addr_mask = wpa_s->mac_addr_scan + ETH_ALEN; | |
1000 | } | |
1001 | } | |
1002 | ||
7c865c68 TB |
1003 | scan_params = ¶ms; |
1004 | ||
1005 | scan: | |
5cc70322 JM |
1006 | #ifdef CONFIG_P2P |
1007 | /* | |
1008 | * If the driver does not support multi-channel concurrency and a | |
1009 | * virtual interface that shares the same radio with the wpa_s interface | |
1010 | * is operating there may not be need to scan other channels apart from | |
1011 | * the current operating channel on the other virtual interface. Filter | |
1012 | * out other channels in case we are trying to find a connection for a | |
1013 | * station interface when we are not configured to prefer station | |
1014 | * connection and a concurrent operation is already in process. | |
1015 | */ | |
12455031 LP |
1016 | if (wpa_s->scan_for_connection && |
1017 | wpa_s->last_scan_req == NORMAL_SCAN_REQ && | |
5cc70322 JM |
1018 | !scan_params->freqs && !params.freqs && |
1019 | wpas_is_p2p_prioritized(wpa_s) && | |
5cc70322 JM |
1020 | wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && |
1021 | non_p2p_network_enabled(wpa_s)) { | |
53c5dfc2 IP |
1022 | unsigned int num = wpa_s->num_multichan_concurrent; |
1023 | ||
1024 | params.freqs = os_calloc(num + 1, sizeof(int)); | |
1025 | if (params.freqs) { | |
1026 | num = get_shared_radio_freqs(wpa_s, params.freqs, num); | |
1027 | if (num > 0 && num == wpa_s->num_multichan_concurrent) { | |
1028 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan only the current operating channels since all channels are already used"); | |
1029 | } else { | |
1030 | os_free(params.freqs); | |
1031 | params.freqs = NULL; | |
1032 | } | |
5cc70322 JM |
1033 | } |
1034 | } | |
1035 | #endif /* CONFIG_P2P */ | |
1036 | ||
7c865c68 | 1037 | ret = wpa_supplicant_trigger_scan(wpa_s, scan_params); |
6fc6879b | 1038 | |
fee52342 JM |
1039 | if (ret && wpa_s->last_scan_req == MANUAL_SCAN_REQ && params.freqs && |
1040 | !wpa_s->manual_scan_freqs) { | |
1041 | /* Restore manual_scan_freqs for the next attempt */ | |
1042 | wpa_s->manual_scan_freqs = params.freqs; | |
1043 | params.freqs = NULL; | |
1044 | } | |
1045 | ||
46ee0427 | 1046 | wpabuf_free(extra_ie); |
d3a98225 | 1047 | os_free(params.freqs); |
3812464c | 1048 | os_free(params.filter_ssids); |
ad08c363 | 1049 | |
6fc6879b | 1050 | if (ret) { |
f049052b | 1051 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate AP scan"); |
2d9c99e3 JM |
1052 | if (wpa_s->scan_prev_wpa_state != wpa_s->wpa_state) |
1053 | wpa_supplicant_set_state(wpa_s, | |
1054 | wpa_s->scan_prev_wpa_state); | |
23270cd8 | 1055 | /* Restore scan_req since we will try to scan again */ |
12455031 | 1056 | wpa_s->scan_req = wpa_s->last_scan_req; |
1c4c9c50 | 1057 | wpa_supplicant_req_scan(wpa_s, 1, 0); |
5cc70322 JM |
1058 | } else { |
1059 | wpa_s->scan_for_connection = 0; | |
a8826b18 JM |
1060 | #ifdef CONFIG_INTERWORKING |
1061 | wpa_s->interworking_fast_assoc_tried = 0; | |
1062 | #endif /* CONFIG_INTERWORKING */ | |
d902a9c1 | 1063 | } |
6fc6879b JM |
1064 | } |
1065 | ||
1066 | ||
9e737f08 PF |
1067 | void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec) |
1068 | { | |
594516b4 | 1069 | struct os_reltime remaining, new_int; |
9e737f08 PF |
1070 | int cancelled; |
1071 | ||
1072 | cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL, | |
1073 | &remaining); | |
1074 | ||
1075 | new_int.sec = sec; | |
1076 | new_int.usec = 0; | |
594516b4 | 1077 | if (cancelled && os_reltime_before(&remaining, &new_int)) { |
9e737f08 PF |
1078 | new_int.sec = remaining.sec; |
1079 | new_int.usec = remaining.usec; | |
1080 | } | |
1081 | ||
c6f5dec9 PF |
1082 | if (cancelled) { |
1083 | eloop_register_timeout(new_int.sec, new_int.usec, | |
1084 | wpa_supplicant_scan, wpa_s, NULL); | |
1085 | } | |
9e737f08 PF |
1086 | wpa_s->scan_interval = sec; |
1087 | } | |
1088 | ||
1089 | ||
6fc6879b JM |
1090 | /** |
1091 | * wpa_supplicant_req_scan - Schedule a scan for neighboring access points | |
1092 | * @wpa_s: Pointer to wpa_supplicant data | |
1093 | * @sec: Number of seconds after which to scan | |
1094 | * @usec: Number of microseconds after which to scan | |
1095 | * | |
1096 | * This function is used to schedule a scan for neighboring access points after | |
1097 | * the specified time. | |
1098 | */ | |
1099 | void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec) | |
1100 | { | |
44b9ea5b JM |
1101 | int res; |
1102 | ||
1103 | if (wpa_s->p2p_mgmt) { | |
1104 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1105 | "Ignore scan request (%d.%06d sec) on p2p_mgmt interface", | |
1106 | sec, usec); | |
1107 | return; | |
1108 | } | |
1109 | ||
1110 | res = eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, | |
1111 | NULL); | |
a09ffd5f JM |
1112 | if (res == 1) { |
1113 | wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d.%06d sec", | |
e2f5a988 | 1114 | sec, usec); |
a09ffd5f JM |
1115 | } else if (res == 0) { |
1116 | wpa_dbg(wpa_s, MSG_DEBUG, "Ignore new scan request for %d.%06d sec since an earlier request is scheduled to trigger sooner", | |
1117 | sec, usec); | |
1118 | } else { | |
1119 | wpa_dbg(wpa_s, MSG_DEBUG, "Setting scan request: %d.%06d sec", | |
1120 | sec, usec); | |
1121 | eloop_register_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL); | |
e2f5a988 | 1122 | } |
6fc6879b JM |
1123 | } |
1124 | ||
1125 | ||
6a90053c LC |
1126 | /** |
1127 | * wpa_supplicant_delayed_sched_scan - Request a delayed scheduled scan | |
1128 | * @wpa_s: Pointer to wpa_supplicant data | |
1129 | * @sec: Number of seconds after which to scan | |
1130 | * @usec: Number of microseconds after which to scan | |
2c09af30 | 1131 | * Returns: 0 on success or -1 otherwise |
6a90053c LC |
1132 | * |
1133 | * This function is used to schedule periodic scans for neighboring | |
1134 | * access points after the specified time. | |
1135 | */ | |
1136 | int wpa_supplicant_delayed_sched_scan(struct wpa_supplicant *wpa_s, | |
1137 | int sec, int usec) | |
1138 | { | |
1139 | if (!wpa_s->sched_scan_supported) | |
1140 | return -1; | |
1141 | ||
1142 | eloop_register_timeout(sec, usec, | |
1143 | wpa_supplicant_delayed_sched_scan_timeout, | |
1144 | wpa_s, NULL); | |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | ||
cbdf3507 LC |
1150 | /** |
1151 | * wpa_supplicant_req_sched_scan - Start a periodic scheduled scan | |
1152 | * @wpa_s: Pointer to wpa_supplicant data | |
2c09af30 | 1153 | * Returns: 0 is sched_scan was started or -1 otherwise |
cbdf3507 LC |
1154 | * |
1155 | * This function is used to schedule periodic scans for neighboring | |
1156 | * access points repeating the scan continuously. | |
1157 | */ | |
1158 | int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s) | |
1159 | { | |
1160 | struct wpa_driver_scan_params params; | |
7c865c68 | 1161 | struct wpa_driver_scan_params *scan_params; |
cbdf3507 | 1162 | enum wpa_states prev_state; |
7c865c68 | 1163 | struct wpa_ssid *ssid = NULL; |
a13e07ec | 1164 | struct wpabuf *extra_ie = NULL; |
cbdf3507 | 1165 | int ret; |
cbdf3507 | 1166 | unsigned int max_sched_scan_ssids; |
76a5249e | 1167 | int wildcard = 0; |
0b7a25c0 | 1168 | int need_ssids; |
32c02261 | 1169 | struct sched_scan_plan scan_plan; |
cbdf3507 LC |
1170 | |
1171 | if (!wpa_s->sched_scan_supported) | |
1172 | return -1; | |
1173 | ||
1174 | if (wpa_s->max_sched_scan_ssids > WPAS_MAX_SCAN_SSIDS) | |
1175 | max_sched_scan_ssids = WPAS_MAX_SCAN_SSIDS; | |
1176 | else | |
1177 | max_sched_scan_ssids = wpa_s->max_sched_scan_ssids; | |
54ddd743 | 1178 | if (max_sched_scan_ssids < 1 || wpa_s->conf->disable_scan_offload) |
76a5249e | 1179 | return -1; |
cbdf3507 | 1180 | |
1966e3d1 ES |
1181 | if (wpa_s->sched_scanning) { |
1182 | wpa_dbg(wpa_s, MSG_DEBUG, "Already sched scanning"); | |
cbdf3507 | 1183 | return 0; |
1966e3d1 | 1184 | } |
cbdf3507 | 1185 | |
0b7a25c0 JM |
1186 | need_ssids = 0; |
1187 | for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { | |
349493bd | 1188 | if (!wpas_network_disabled(wpa_s, ssid) && !ssid->scan_ssid) { |
0b7a25c0 JM |
1189 | /* Use wildcard SSID to find this network */ |
1190 | wildcard = 1; | |
349493bd JM |
1191 | } else if (!wpas_network_disabled(wpa_s, ssid) && |
1192 | ssid->ssid_len) | |
0b7a25c0 | 1193 | need_ssids++; |
aa283ddd JM |
1194 | |
1195 | #ifdef CONFIG_WPS | |
349493bd | 1196 | if (!wpas_network_disabled(wpa_s, ssid) && |
fea7c3a0 | 1197 | ssid->key_mgmt == WPA_KEY_MGMT_WPS) { |
aa283ddd JM |
1198 | /* |
1199 | * Normal scan is more reliable and faster for WPS | |
1200 | * operations and since these are for short periods of | |
1201 | * time, the benefit of trying to use sched_scan would | |
1202 | * be limited. | |
1203 | */ | |
1204 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
1205 | "sched_scan for WPS"); | |
1206 | return -1; | |
1207 | } | |
1208 | #endif /* CONFIG_WPS */ | |
0b7a25c0 JM |
1209 | } |
1210 | if (wildcard) | |
1211 | need_ssids++; | |
1212 | ||
1213 | if (wpa_s->normal_scans < 3 && | |
1214 | (need_ssids <= wpa_s->max_scan_ssids || | |
1215 | wpa_s->max_scan_ssids >= (int) max_sched_scan_ssids)) { | |
1216 | /* | |
1217 | * When normal scan can speed up operations, use that for the | |
1218 | * first operations before starting the sched_scan to allow | |
1219 | * user space sleep more. We do this only if the normal scan | |
1220 | * has functionality that is suitable for this or if the | |
1221 | * sched_scan does not have better support for multiple SSIDs. | |
1222 | */ | |
1223 | wpa_dbg(wpa_s, MSG_DEBUG, "Use normal scan instead of " | |
1224 | "sched_scan for initial scans (normal_scans=%d)", | |
1225 | wpa_s->normal_scans); | |
1226 | return -1; | |
1227 | } | |
1228 | ||
cbdf3507 LC |
1229 | os_memset(¶ms, 0, sizeof(params)); |
1230 | ||
b59e6f26 | 1231 | /* If we can't allocate space for the filters, we just don't filter */ |
faebdeaa | 1232 | params.filter_ssids = os_calloc(wpa_s->max_match_sets, |
b59e6f26 LC |
1233 | sizeof(struct wpa_driver_scan_filter)); |
1234 | ||
cbdf3507 LC |
1235 | prev_state = wpa_s->wpa_state; |
1236 | if (wpa_s->wpa_state == WPA_DISCONNECTED || | |
1237 | wpa_s->wpa_state == WPA_INACTIVE) | |
1238 | wpa_supplicant_set_state(wpa_s, WPA_SCANNING); | |
1239 | ||
7c865c68 TB |
1240 | if (wpa_s->autoscan_params != NULL) { |
1241 | scan_params = wpa_s->autoscan_params; | |
1242 | goto scan; | |
1243 | } | |
1244 | ||
cbdf3507 LC |
1245 | /* Find the starting point from which to continue scanning */ |
1246 | ssid = wpa_s->conf->ssid; | |
1247 | if (wpa_s->prev_sched_ssid) { | |
1248 | while (ssid) { | |
1249 | if (ssid == wpa_s->prev_sched_ssid) { | |
1250 | ssid = ssid->next; | |
1251 | break; | |
1252 | } | |
1253 | ssid = ssid->next; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | if (!ssid || !wpa_s->prev_sched_ssid) { | |
1258 | wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list"); | |
cbdf3507 LC |
1259 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; |
1260 | wpa_s->first_sched_scan = 1; | |
1261 | ssid = wpa_s->conf->ssid; | |
1262 | wpa_s->prev_sched_ssid = ssid; | |
1263 | } | |
1264 | ||
76a5249e JM |
1265 | if (wildcard) { |
1266 | wpa_dbg(wpa_s, MSG_DEBUG, "Add wildcard SSID to sched_scan"); | |
1267 | params.num_ssids++; | |
1268 | } | |
1269 | ||
cbdf3507 | 1270 | while (ssid) { |
349493bd | 1271 | if (wpas_network_disabled(wpa_s, ssid)) |
5edddf41 | 1272 | goto next; |
cbdf3507 | 1273 | |
fcd16847 JM |
1274 | if (params.num_filter_ssids < wpa_s->max_match_sets && |
1275 | params.filter_ssids && ssid->ssid && ssid->ssid_len) { | |
1966e3d1 ES |
1276 | wpa_dbg(wpa_s, MSG_DEBUG, "add to filter ssid: %s", |
1277 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); | |
b59e6f26 LC |
1278 | os_memcpy(params.filter_ssids[params.num_filter_ssids].ssid, |
1279 | ssid->ssid, ssid->ssid_len); | |
1280 | params.filter_ssids[params.num_filter_ssids].ssid_len = | |
1281 | ssid->ssid_len; | |
1282 | params.num_filter_ssids++; | |
86b47aaf JM |
1283 | } else if (params.filter_ssids && ssid->ssid && ssid->ssid_len) |
1284 | { | |
1285 | wpa_dbg(wpa_s, MSG_DEBUG, "Not enough room for SSID " | |
1286 | "filter for sched_scan - drop filter"); | |
1287 | os_free(params.filter_ssids); | |
1288 | params.filter_ssids = NULL; | |
1289 | params.num_filter_ssids = 0; | |
b59e6f26 LC |
1290 | } |
1291 | ||
3f56f3a4 | 1292 | if (ssid->scan_ssid && ssid->ssid && ssid->ssid_len) { |
76a5249e JM |
1293 | if (params.num_ssids == max_sched_scan_ssids) |
1294 | break; /* only room for broadcast SSID */ | |
3f56f3a4 JM |
1295 | wpa_dbg(wpa_s, MSG_DEBUG, |
1296 | "add to active scan ssid: %s", | |
1966e3d1 | 1297 | wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); |
cbdf3507 LC |
1298 | params.ssids[params.num_ssids].ssid = |
1299 | ssid->ssid; | |
1300 | params.ssids[params.num_ssids].ssid_len = | |
1301 | ssid->ssid_len; | |
1302 | params.num_ssids++; | |
b59e6f26 | 1303 | if (params.num_ssids >= max_sched_scan_ssids) { |
cbdf3507 | 1304 | wpa_s->prev_sched_ssid = ssid; |
b55aca46 JM |
1305 | do { |
1306 | ssid = ssid->next; | |
1307 | } while (ssid && | |
349493bd | 1308 | (wpas_network_disabled(wpa_s, ssid) || |
fea7c3a0 | 1309 | !ssid->scan_ssid)); |
cbdf3507 LC |
1310 | break; |
1311 | } | |
1312 | } | |
b59e6f26 | 1313 | |
5edddf41 | 1314 | next: |
cbdf3507 LC |
1315 | wpa_s->prev_sched_ssid = ssid; |
1316 | ssid = ssid->next; | |
1317 | } | |
1318 | ||
7c6a266c JM |
1319 | if (params.num_filter_ssids == 0) { |
1320 | os_free(params.filter_ssids); | |
1321 | params.filter_ssids = NULL; | |
1322 | } | |
1323 | ||
a13e07ec ES |
1324 | extra_ie = wpa_supplicant_extra_ies(wpa_s); |
1325 | if (extra_ie) { | |
1326 | params.extra_ies = wpabuf_head(extra_ie); | |
1327 | params.extra_ies_len = wpabuf_len(extra_ie); | |
1328 | } | |
cbdf3507 | 1329 | |
cf70d298 RM |
1330 | if (wpa_s->conf->filter_rssi) |
1331 | params.filter_rssi = wpa_s->conf->filter_rssi; | |
1332 | ||
1cc0d6a0 BP |
1333 | /* See if user specified frequencies. If so, scan only those. */ |
1334 | if (wpa_s->conf->freq_list && !params.freqs) { | |
1335 | wpa_dbg(wpa_s, MSG_DEBUG, | |
1336 | "Optimize scan based on conf->freq_list"); | |
1337 | int_array_concat(¶ms.freqs, wpa_s->conf->freq_list); | |
1338 | } | |
1339 | ||
7c865c68 TB |
1340 | scan_params = ¶ms; |
1341 | ||
1342 | scan: | |
32c02261 AS |
1343 | wpa_s->sched_scan_timed_out = 0; |
1344 | ||
1345 | /* | |
1346 | * We cannot support multiple scan plans if the scan request includes | |
1347 | * too many SSID's, so in this case use only the last scan plan and make | |
1348 | * it run infinitely. It will be stopped by the timeout. | |
1349 | */ | |
1350 | if (wpa_s->sched_scan_plans_num == 1 || | |
1351 | (wpa_s->sched_scan_plans_num && !ssid && wpa_s->first_sched_scan)) { | |
1352 | params.sched_scan_plans = wpa_s->sched_scan_plans; | |
1353 | params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; | |
1354 | } else if (wpa_s->sched_scan_plans_num > 1) { | |
a8cb5a88 | 1355 | wpa_dbg(wpa_s, MSG_DEBUG, |
32c02261 AS |
1356 | "Too many SSIDs. Default to using single scheduled_scan plan"); |
1357 | params.sched_scan_plans = | |
1358 | &wpa_s->sched_scan_plans[wpa_s->sched_scan_plans_num - | |
1359 | 1]; | |
1360 | params.sched_scan_plans_num = 1; | |
7d21a223 | 1361 | } else { |
32c02261 AS |
1362 | if (wpa_s->conf->sched_scan_interval) |
1363 | scan_plan.interval = wpa_s->conf->sched_scan_interval; | |
1364 | else | |
1365 | scan_plan.interval = 10; | |
1366 | ||
1367 | if (scan_plan.interval > wpa_s->max_sched_scan_plan_interval) { | |
1368 | wpa_printf(MSG_WARNING, | |
1369 | "Scan interval too long(%u), use the maximum allowed(%u)", | |
1370 | scan_plan.interval, | |
1371 | wpa_s->max_sched_scan_plan_interval); | |
1372 | scan_plan.interval = | |
1373 | wpa_s->max_sched_scan_plan_interval; | |
1374 | } | |
1375 | ||
1376 | scan_plan.iterations = 0; | |
1377 | params.sched_scan_plans = &scan_plan; | |
1378 | params.sched_scan_plans_num = 1; | |
1379 | } | |
1380 | ||
1381 | if (ssid || !wpa_s->first_sched_scan) { | |
7d21a223 | 1382 | wpa_dbg(wpa_s, MSG_DEBUG, |
32c02261 AS |
1383 | "Starting sched scan: interval %u timeout %d", |
1384 | params.sched_scan_plans[0].interval, | |
1385 | wpa_s->sched_scan_timeout); | |
1386 | } else { | |
1387 | wpa_dbg(wpa_s, MSG_DEBUG, "Starting sched scan (no timeout)"); | |
a8cb5a88 | 1388 | } |
cbdf3507 | 1389 | |
faf9a858 JM |
1390 | wpa_setband_scan_freqs(wpa_s, scan_params); |
1391 | ||
56c76fa5 IP |
1392 | if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_SCHED_SCAN) { |
1393 | params.mac_addr_rand = 1; | |
1394 | if (wpa_s->mac_addr_sched_scan) { | |
1395 | params.mac_addr = wpa_s->mac_addr_sched_scan; | |
1396 | params.mac_addr_mask = wpa_s->mac_addr_sched_scan + | |
1397 | ETH_ALEN; | |
1398 | } | |
1399 | } | |
1400 | ||
32c02261 | 1401 | ret = wpa_supplicant_start_sched_scan(wpa_s, scan_params); |
a13e07ec | 1402 | wpabuf_free(extra_ie); |
b59e6f26 | 1403 | os_free(params.filter_ssids); |
cbdf3507 LC |
1404 | if (ret) { |
1405 | wpa_msg(wpa_s, MSG_WARNING, "Failed to initiate sched scan"); | |
1406 | if (prev_state != wpa_s->wpa_state) | |
1407 | wpa_supplicant_set_state(wpa_s, prev_state); | |
1408 | return ret; | |
1409 | } | |
1410 | ||
1411 | /* If we have more SSIDs to scan, add a timeout so we scan them too */ | |
1412 | if (ssid || !wpa_s->first_sched_scan) { | |
1413 | wpa_s->sched_scan_timed_out = 0; | |
1414 | eloop_register_timeout(wpa_s->sched_scan_timeout, 0, | |
1415 | wpa_supplicant_sched_scan_timeout, | |
1416 | wpa_s, NULL); | |
1417 | wpa_s->first_sched_scan = 0; | |
1418 | wpa_s->sched_scan_timeout /= 2; | |
32c02261 AS |
1419 | params.sched_scan_plans[0].interval *= 2; |
1420 | if ((unsigned int) wpa_s->sched_scan_timeout < | |
1421 | params.sched_scan_plans[0].interval || | |
1422 | params.sched_scan_plans[0].interval > | |
1423 | wpa_s->max_sched_scan_plan_interval) { | |
1424 | params.sched_scan_plans[0].interval = 10; | |
a09fc1cc DS |
1425 | wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2; |
1426 | } | |
cbdf3507 LC |
1427 | } |
1428 | ||
7ed52f67 DS |
1429 | /* If there is no more ssids, start next time from the beginning */ |
1430 | if (!ssid) | |
1431 | wpa_s->prev_sched_ssid = NULL; | |
1432 | ||
cbdf3507 LC |
1433 | return 0; |
1434 | } | |
1435 | ||
1436 | ||
6fc6879b JM |
1437 | /** |
1438 | * wpa_supplicant_cancel_scan - Cancel a scheduled scan request | |
1439 | * @wpa_s: Pointer to wpa_supplicant data | |
1440 | * | |
1441 | * This function is used to cancel a scan request scheduled with | |
1442 | * wpa_supplicant_req_scan(). | |
1443 | */ | |
1444 | void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s) | |
1445 | { | |
f049052b | 1446 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling scan request"); |
6fc6879b JM |
1447 | eloop_cancel_timeout(wpa_supplicant_scan, wpa_s, NULL); |
1448 | } | |
cb8564b1 DW |
1449 | |
1450 | ||
831770bf CZ |
1451 | /** |
1452 | * wpa_supplicant_cancel_delayed_sched_scan - Stop a delayed scheduled scan | |
1453 | * @wpa_s: Pointer to wpa_supplicant data | |
1454 | * | |
1455 | * This function is used to stop a delayed scheduled scan. | |
1456 | */ | |
1457 | void wpa_supplicant_cancel_delayed_sched_scan(struct wpa_supplicant *wpa_s) | |
1458 | { | |
1459 | if (!wpa_s->sched_scan_supported) | |
1460 | return; | |
1461 | ||
1462 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling delayed sched scan"); | |
1463 | eloop_cancel_timeout(wpa_supplicant_delayed_sched_scan_timeout, | |
1464 | wpa_s, NULL); | |
1465 | } | |
1466 | ||
1467 | ||
cbdf3507 LC |
1468 | /** |
1469 | * wpa_supplicant_cancel_sched_scan - Stop running scheduled scans | |
1470 | * @wpa_s: Pointer to wpa_supplicant data | |
1471 | * | |
1472 | * This function is used to stop a periodic scheduled scan. | |
1473 | */ | |
1474 | void wpa_supplicant_cancel_sched_scan(struct wpa_supplicant *wpa_s) | |
1475 | { | |
1476 | if (!wpa_s->sched_scanning) | |
1477 | return; | |
1478 | ||
1479 | wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling sched scan"); | |
1480 | eloop_cancel_timeout(wpa_supplicant_sched_scan_timeout, wpa_s, NULL); | |
1481 | wpa_supplicant_stop_sched_scan(wpa_s); | |
1482 | } | |
1483 | ||
1484 | ||
2c09af30 JM |
1485 | /** |
1486 | * wpa_supplicant_notify_scanning - Indicate possible scan state change | |
1487 | * @wpa_s: Pointer to wpa_supplicant data | |
1488 | * @scanning: Whether scanning is currently in progress | |
1489 | * | |
1490 | * This function is to generate scanning notifycations. It is called whenever | |
1491 | * there may have been a change in scanning (scan started, completed, stopped). | |
1492 | * wpas_notify_scanning() is called whenever the scanning state changed from the | |
1493 | * previously notified state. | |
1494 | */ | |
cb8564b1 DW |
1495 | void wpa_supplicant_notify_scanning(struct wpa_supplicant *wpa_s, |
1496 | int scanning) | |
1497 | { | |
1498 | if (wpa_s->scanning != scanning) { | |
1499 | wpa_s->scanning = scanning; | |
8bac466b | 1500 | wpas_notify_scanning(wpa_s); |
cb8564b1 DW |
1501 | } |
1502 | } | |
1503 | ||
9ba9fa07 JM |
1504 | |
1505 | static int wpa_scan_get_max_rate(const struct wpa_scan_res *res) | |
1506 | { | |
1507 | int rate = 0; | |
1508 | const u8 *ie; | |
1509 | int i; | |
1510 | ||
1511 | ie = wpa_scan_get_ie(res, WLAN_EID_SUPP_RATES); | |
1512 | for (i = 0; ie && i < ie[1]; i++) { | |
1513 | if ((ie[i + 2] & 0x7f) > rate) | |
1514 | rate = ie[i + 2] & 0x7f; | |
1515 | } | |
1516 | ||
1517 | ie = wpa_scan_get_ie(res, WLAN_EID_EXT_SUPP_RATES); | |
1518 | for (i = 0; ie && i < ie[1]; i++) { | |
1519 | if ((ie[i + 2] & 0x7f) > rate) | |
1520 | rate = ie[i + 2] & 0x7f; | |
1521 | } | |
1522 | ||
1523 | return rate; | |
1524 | } | |
1525 | ||
1526 | ||
2c09af30 JM |
1527 | /** |
1528 | * wpa_scan_get_ie - Fetch a specified information element from a scan result | |
1529 | * @res: Scan result entry | |
1530 | * @ie: Information element identitifier (WLAN_EID_*) | |
1531 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1532 | * | |
1533 | * This function returns the first matching information element in the scan | |
1534 | * result. | |
1535 | */ | |
d1f9c410 JM |
1536 | const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie) |
1537 | { | |
1538 | const u8 *end, *pos; | |
1539 | ||
1540 | pos = (const u8 *) (res + 1); | |
1541 | end = pos + res->ie_len; | |
1542 | ||
904e977b JM |
1543 | while (end - pos > 1) { |
1544 | if (2 + pos[1] > end - pos) | |
d1f9c410 JM |
1545 | break; |
1546 | if (pos[0] == ie) | |
1547 | return pos; | |
1548 | pos += 2 + pos[1]; | |
1549 | } | |
1550 | ||
1551 | return NULL; | |
1552 | } | |
1553 | ||
1554 | ||
2c09af30 JM |
1555 | /** |
1556 | * wpa_scan_get_vendor_ie - Fetch vendor information element from a scan result | |
1557 | * @res: Scan result entry | |
1558 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1559 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1560 | * | |
1561 | * This function returns the first matching information element in the scan | |
1562 | * result. | |
1563 | */ | |
9ba9fa07 JM |
1564 | const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res, |
1565 | u32 vendor_type) | |
1566 | { | |
1567 | const u8 *end, *pos; | |
1568 | ||
1569 | pos = (const u8 *) (res + 1); | |
1570 | end = pos + res->ie_len; | |
1571 | ||
904e977b JM |
1572 | while (end - pos > 1) { |
1573 | if (2 + pos[1] > end - pos) | |
9ba9fa07 JM |
1574 | break; |
1575 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1576 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1577 | return pos; | |
1578 | pos += 2 + pos[1]; | |
1579 | } | |
1580 | ||
1581 | return NULL; | |
1582 | } | |
1583 | ||
1584 | ||
aaeb9c98 JM |
1585 | /** |
1586 | * wpa_scan_get_vendor_ie_beacon - Fetch vendor information from a scan result | |
1587 | * @res: Scan result entry | |
1588 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1589 | * Returns: Pointer to the information element (id field) or %NULL if not found | |
1590 | * | |
1591 | * This function returns the first matching information element in the scan | |
1592 | * result. | |
1593 | * | |
1594 | * This function is like wpa_scan_get_vendor_ie(), but uses IE buffer only | |
1595 | * from Beacon frames instead of either Beacon or Probe Response frames. | |
1596 | */ | |
1597 | const u8 * wpa_scan_get_vendor_ie_beacon(const struct wpa_scan_res *res, | |
1598 | u32 vendor_type) | |
1599 | { | |
1600 | const u8 *end, *pos; | |
1601 | ||
1602 | if (res->beacon_ie_len == 0) | |
1603 | return NULL; | |
1604 | ||
1605 | pos = (const u8 *) (res + 1); | |
1606 | pos += res->ie_len; | |
1607 | end = pos + res->beacon_ie_len; | |
1608 | ||
904e977b JM |
1609 | while (end - pos > 1) { |
1610 | if (2 + pos[1] > end - pos) | |
aaeb9c98 JM |
1611 | break; |
1612 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1613 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1614 | return pos; | |
1615 | pos += 2 + pos[1]; | |
1616 | } | |
1617 | ||
1618 | return NULL; | |
1619 | } | |
1620 | ||
1621 | ||
2c09af30 JM |
1622 | /** |
1623 | * wpa_scan_get_vendor_ie_multi - Fetch vendor IE data from a scan result | |
1624 | * @res: Scan result entry | |
1625 | * @vendor_type: Vendor type (four octets starting the IE payload) | |
1626 | * Returns: Pointer to the information element payload or %NULL if not found | |
1627 | * | |
1628 | * This function returns concatenated payload of possibly fragmented vendor | |
1629 | * specific information elements in the scan result. The caller is responsible | |
1630 | * for freeing the returned buffer. | |
1631 | */ | |
9ba9fa07 JM |
1632 | struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res, |
1633 | u32 vendor_type) | |
1634 | { | |
1635 | struct wpabuf *buf; | |
1636 | const u8 *end, *pos; | |
1637 | ||
1638 | buf = wpabuf_alloc(res->ie_len); | |
1639 | if (buf == NULL) | |
1640 | return NULL; | |
1641 | ||
1642 | pos = (const u8 *) (res + 1); | |
1643 | end = pos + res->ie_len; | |
1644 | ||
904e977b JM |
1645 | while (end - pos > 1) { |
1646 | if (2 + pos[1] > end - pos) | |
54f489be JM |
1647 | break; |
1648 | if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 && | |
1649 | vendor_type == WPA_GET_BE32(&pos[2])) | |
1650 | wpabuf_put_data(buf, pos + 2 + 4, pos[1] - 4); | |
1651 | pos += 2 + pos[1]; | |
1652 | } | |
1653 | ||
1654 | if (wpabuf_len(buf) == 0) { | |
1655 | wpabuf_free(buf); | |
1656 | buf = NULL; | |
1657 | } | |
1658 | ||
1659 | return buf; | |
1660 | } | |
1661 | ||
1662 | ||
577db0ae GM |
1663 | /* |
1664 | * Channels with a great SNR can operate at full rate. What is a great SNR? | |
1665 | * This doc https://supportforums.cisco.com/docs/DOC-12954 says, "the general | |
1666 | * rule of thumb is that any SNR above 20 is good." This one | |
1667 | * http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#qa23 | |
1668 | * recommends 25 as a minimum SNR for 54 Mbps data rate. 30 is chosen here as a | |
1669 | * conservative value. | |
1670 | */ | |
1671 | #define GREAT_SNR 30 | |
1672 | ||
f0d0a5d2 MA |
1673 | #define IS_5GHZ(n) (n > 4000) |
1674 | ||
9ba9fa07 JM |
1675 | /* Compare function for sorting scan results. Return >0 if @b is considered |
1676 | * better. */ | |
1677 | static int wpa_scan_result_compar(const void *a, const void *b) | |
1678 | { | |
577db0ae | 1679 | #define MIN(a,b) a < b ? a : b |
9ba9fa07 JM |
1680 | struct wpa_scan_res **_wa = (void *) a; |
1681 | struct wpa_scan_res **_wb = (void *) b; | |
1682 | struct wpa_scan_res *wa = *_wa; | |
1683 | struct wpa_scan_res *wb = *_wb; | |
a1b790eb JM |
1684 | int wpa_a, wpa_b; |
1685 | int snr_a, snr_b, snr_a_full, snr_b_full; | |
9ba9fa07 JM |
1686 | |
1687 | /* WPA/WPA2 support preferred */ | |
1688 | wpa_a = wpa_scan_get_vendor_ie(wa, WPA_IE_VENDOR_TYPE) != NULL || | |
1689 | wpa_scan_get_ie(wa, WLAN_EID_RSN) != NULL; | |
1690 | wpa_b = wpa_scan_get_vendor_ie(wb, WPA_IE_VENDOR_TYPE) != NULL || | |
1691 | wpa_scan_get_ie(wb, WLAN_EID_RSN) != NULL; | |
1692 | ||
1693 | if (wpa_b && !wpa_a) | |
1694 | return 1; | |
1695 | if (!wpa_b && wpa_a) | |
1696 | return -1; | |
1697 | ||
1698 | /* privacy support preferred */ | |
1699 | if ((wa->caps & IEEE80211_CAP_PRIVACY) == 0 && | |
1700 | (wb->caps & IEEE80211_CAP_PRIVACY)) | |
1701 | return 1; | |
1702 | if ((wa->caps & IEEE80211_CAP_PRIVACY) && | |
1703 | (wb->caps & IEEE80211_CAP_PRIVACY) == 0) | |
1704 | return -1; | |
1705 | ||
f0d0a5d2 | 1706 | if (wa->flags & wb->flags & WPA_SCAN_LEVEL_DBM) { |
a1b790eb JM |
1707 | snr_a_full = wa->snr; |
1708 | snr_a = MIN(wa->snr, GREAT_SNR); | |
1709 | snr_b_full = wb->snr; | |
aa517ae2 | 1710 | snr_b = MIN(wb->snr, GREAT_SNR); |
577db0ae | 1711 | } else { |
f0d0a5d2 MA |
1712 | /* Level is not in dBm, so we can't calculate |
1713 | * SNR. Just use raw level (units unknown). */ | |
a1b790eb JM |
1714 | snr_a = snr_a_full = wa->level; |
1715 | snr_b = snr_b_full = wb->level; | |
577db0ae GM |
1716 | } |
1717 | ||
f0d0a5d2 MA |
1718 | /* if SNR is close, decide by max rate or frequency band */ |
1719 | if ((snr_a && snr_b && abs(snr_b - snr_a) < 5) || | |
9ba9fa07 | 1720 | (wa->qual && wb->qual && abs(wb->qual - wa->qual) < 10)) { |
a1b790eb JM |
1721 | if (wa->est_throughput != wb->est_throughput) |
1722 | return wb->est_throughput - wa->est_throughput; | |
577db0ae GM |
1723 | if (IS_5GHZ(wa->freq) ^ IS_5GHZ(wb->freq)) |
1724 | return IS_5GHZ(wa->freq) ? -1 : 1; | |
9ba9fa07 JM |
1725 | } |
1726 | ||
577db0ae | 1727 | /* all things being equal, use SNR; if SNRs are |
9ba9fa07 JM |
1728 | * identical, use quality values since some drivers may only report |
1729 | * that value and leave the signal level zero */ | |
a1b790eb | 1730 | if (snr_b_full == snr_a_full) |
9ba9fa07 | 1731 | return wb->qual - wa->qual; |
a1b790eb | 1732 | return snr_b_full - snr_a_full; |
577db0ae | 1733 | #undef MIN |
9ba9fa07 JM |
1734 | } |
1735 | ||
1736 | ||
41e650ae JM |
1737 | #ifdef CONFIG_WPS |
1738 | /* Compare function for sorting scan results when searching a WPS AP for | |
1739 | * provisioning. Return >0 if @b is considered better. */ | |
1740 | static int wpa_scan_result_wps_compar(const void *a, const void *b) | |
1741 | { | |
1742 | struct wpa_scan_res **_wa = (void *) a; | |
1743 | struct wpa_scan_res **_wb = (void *) b; | |
1744 | struct wpa_scan_res *wa = *_wa; | |
1745 | struct wpa_scan_res *wb = *_wb; | |
1746 | int uses_wps_a, uses_wps_b; | |
1747 | struct wpabuf *wps_a, *wps_b; | |
1748 | int res; | |
1749 | ||
1750 | /* Optimization - check WPS IE existence before allocated memory and | |
1751 | * doing full reassembly. */ | |
1752 | uses_wps_a = wpa_scan_get_vendor_ie(wa, WPS_IE_VENDOR_TYPE) != NULL; | |
1753 | uses_wps_b = wpa_scan_get_vendor_ie(wb, WPS_IE_VENDOR_TYPE) != NULL; | |
1754 | if (uses_wps_a && !uses_wps_b) | |
1755 | return -1; | |
1756 | if (!uses_wps_a && uses_wps_b) | |
1757 | return 1; | |
1758 | ||
1759 | if (uses_wps_a && uses_wps_b) { | |
1760 | wps_a = wpa_scan_get_vendor_ie_multi(wa, WPS_IE_VENDOR_TYPE); | |
1761 | wps_b = wpa_scan_get_vendor_ie_multi(wb, WPS_IE_VENDOR_TYPE); | |
1762 | res = wps_ap_priority_compar(wps_a, wps_b); | |
1763 | wpabuf_free(wps_a); | |
1764 | wpabuf_free(wps_b); | |
1765 | if (res) | |
1766 | return res; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Do not use current AP security policy as a sorting criteria during | |
1771 | * WPS provisioning step since the AP may get reconfigured at the | |
1772 | * completion of provisioning. | |
1773 | */ | |
1774 | ||
1775 | /* all things being equal, use signal level; if signal levels are | |
1776 | * identical, use quality values since some drivers may only report | |
1777 | * that value and leave the signal level zero */ | |
1778 | if (wb->level == wa->level) | |
1779 | return wb->qual - wa->qual; | |
1780 | return wb->level - wa->level; | |
1781 | } | |
1782 | #endif /* CONFIG_WPS */ | |
1783 | ||
1784 | ||
aa820e02 JM |
1785 | static void dump_scan_res(struct wpa_scan_results *scan_res) |
1786 | { | |
76202aed | 1787 | #ifndef CONFIG_NO_STDOUT_DEBUG |
aa820e02 JM |
1788 | size_t i; |
1789 | ||
1790 | if (scan_res->res == NULL || scan_res->num == 0) | |
1791 | return; | |
1792 | ||
1793 | wpa_printf(MSG_EXCESSIVE, "Sorted scan results"); | |
1794 | ||
1795 | for (i = 0; i < scan_res->num; i++) { | |
1796 | struct wpa_scan_res *r = scan_res->res[i]; | |
1cbe86e2 | 1797 | u8 *pos; |
f0d0a5d2 | 1798 | if (r->flags & WPA_SCAN_LEVEL_DBM) { |
f0d0a5d2 MA |
1799 | int noise_valid = !(r->flags & WPA_SCAN_NOISE_INVALID); |
1800 | ||
aa820e02 | 1801 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " |
a1b790eb | 1802 | "noise=%d%s level=%d snr=%d%s flags=0x%x age=%u est=%u", |
aa820e02 | 1803 | MAC2STR(r->bssid), r->freq, r->qual, |
f0d0a5d2 | 1804 | r->noise, noise_valid ? "" : "~", r->level, |
a1b790eb JM |
1805 | r->snr, r->snr >= GREAT_SNR ? "*" : "", |
1806 | r->flags, | |
1807 | r->age, r->est_throughput); | |
aa820e02 JM |
1808 | } else { |
1809 | wpa_printf(MSG_EXCESSIVE, MACSTR " freq=%d qual=%d " | |
a1b790eb | 1810 | "noise=%d level=%d flags=0x%x age=%u est=%u", |
aa820e02 | 1811 | MAC2STR(r->bssid), r->freq, r->qual, |
a1b790eb JM |
1812 | r->noise, r->level, r->flags, r->age, |
1813 | r->est_throughput); | |
aa820e02 | 1814 | } |
1cbe86e2 JM |
1815 | pos = (u8 *) (r + 1); |
1816 | if (r->ie_len) | |
1817 | wpa_hexdump(MSG_EXCESSIVE, "IEs", pos, r->ie_len); | |
1818 | pos += r->ie_len; | |
1819 | if (r->beacon_ie_len) | |
1820 | wpa_hexdump(MSG_EXCESSIVE, "Beacon IEs", | |
1821 | pos, r->beacon_ie_len); | |
aa820e02 | 1822 | } |
76202aed | 1823 | #endif /* CONFIG_NO_STDOUT_DEBUG */ |
aa820e02 JM |
1824 | } |
1825 | ||
1826 | ||
2c09af30 JM |
1827 | /** |
1828 | * wpa_supplicant_filter_bssid_match - Is the specified BSSID allowed | |
1829 | * @wpa_s: Pointer to wpa_supplicant data | |
1830 | * @bssid: BSSID to check | |
1831 | * Returns: 0 if the BSSID is filtered or 1 if not | |
1832 | * | |
1833 | * This function is used to filter out specific BSSIDs from scan reslts mainly | |
1834 | * for testing purposes (SET bssid_filter ctrl_iface command). | |
1835 | */ | |
d445a5cd JM |
1836 | int wpa_supplicant_filter_bssid_match(struct wpa_supplicant *wpa_s, |
1837 | const u8 *bssid) | |
1838 | { | |
1839 | size_t i; | |
1840 | ||
1841 | if (wpa_s->bssid_filter == NULL) | |
1842 | return 1; | |
1843 | ||
1844 | for (i = 0; i < wpa_s->bssid_filter_count; i++) { | |
1845 | if (os_memcmp(wpa_s->bssid_filter + i * ETH_ALEN, bssid, | |
1846 | ETH_ALEN) == 0) | |
1847 | return 1; | |
1848 | } | |
1849 | ||
1850 | return 0; | |
1851 | } | |
1852 | ||
1853 | ||
1854 | static void filter_scan_res(struct wpa_supplicant *wpa_s, | |
1855 | struct wpa_scan_results *res) | |
1856 | { | |
1857 | size_t i, j; | |
1858 | ||
1859 | if (wpa_s->bssid_filter == NULL) | |
1860 | return; | |
1861 | ||
1862 | for (i = 0, j = 0; i < res->num; i++) { | |
1863 | if (wpa_supplicant_filter_bssid_match(wpa_s, | |
1864 | res->res[i]->bssid)) { | |
1865 | res->res[j++] = res->res[i]; | |
1866 | } else { | |
1867 | os_free(res->res[i]); | |
1868 | res->res[i] = NULL; | |
1869 | } | |
1870 | } | |
1871 | ||
1872 | if (res->num != j) { | |
1873 | wpa_printf(MSG_DEBUG, "Filtered out %d scan results", | |
1874 | (int) (res->num - j)); | |
1875 | res->num = j; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | ||
f0d0a5d2 MA |
1880 | /* |
1881 | * Noise floor values to use when we have signal strength | |
1882 | * measurements, but no noise floor measurments. These values were | |
1883 | * measured in an office environment with many APs. | |
1884 | */ | |
1885 | #define DEFAULT_NOISE_FLOOR_2GHZ (-89) | |
1886 | #define DEFAULT_NOISE_FLOOR_5GHZ (-92) | |
1887 | ||
a1b790eb JM |
1888 | static void scan_snr(struct wpa_scan_res *res) |
1889 | { | |
1890 | if (res->flags & WPA_SCAN_NOISE_INVALID) { | |
1891 | res->noise = IS_5GHZ(res->freq) ? | |
1892 | DEFAULT_NOISE_FLOOR_5GHZ : | |
1893 | DEFAULT_NOISE_FLOOR_2GHZ; | |
1894 | } | |
1895 | ||
1896 | if (res->flags & WPA_SCAN_LEVEL_DBM) { | |
1897 | res->snr = res->level - res->noise; | |
1898 | } else { | |
1899 | /* Level is not in dBm, so we can't calculate | |
1900 | * SNR. Just use raw level (units unknown). */ | |
1901 | res->snr = res->level; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | ||
1906 | static unsigned int max_ht20_rate(int snr) | |
1907 | { | |
1908 | if (snr < 6) | |
1909 | return 6500; /* HT20 MCS0 */ | |
1910 | if (snr < 8) | |
1911 | return 13000; /* HT20 MCS1 */ | |
1912 | if (snr < 13) | |
1913 | return 19500; /* HT20 MCS2 */ | |
1914 | if (snr < 17) | |
1915 | return 26000; /* HT20 MCS3 */ | |
1916 | if (snr < 20) | |
1917 | return 39000; /* HT20 MCS4 */ | |
1918 | if (snr < 23) | |
1919 | return 52000; /* HT20 MCS5 */ | |
1920 | if (snr < 24) | |
1921 | return 58500; /* HT20 MCS6 */ | |
1922 | return 65000; /* HT20 MCS7 */ | |
1923 | } | |
1924 | ||
1925 | ||
1926 | static unsigned int max_ht40_rate(int snr) | |
1927 | { | |
1928 | if (snr < 3) | |
1929 | return 13500; /* HT40 MCS0 */ | |
1930 | if (snr < 6) | |
1931 | return 27000; /* HT40 MCS1 */ | |
1932 | if (snr < 10) | |
1933 | return 40500; /* HT40 MCS2 */ | |
1934 | if (snr < 15) | |
1935 | return 54000; /* HT40 MCS3 */ | |
1936 | if (snr < 17) | |
1937 | return 81000; /* HT40 MCS4 */ | |
1938 | if (snr < 22) | |
1939 | return 108000; /* HT40 MCS5 */ | |
8b2b718d | 1940 | if (snr < 24) |
a1b790eb JM |
1941 | return 121500; /* HT40 MCS6 */ |
1942 | return 135000; /* HT40 MCS7 */ | |
1943 | } | |
1944 | ||
1945 | ||
1946 | static unsigned int max_vht80_rate(int snr) | |
1947 | { | |
1948 | if (snr < 1) | |
1949 | return 0; | |
1950 | if (snr < 2) | |
1951 | return 29300; /* VHT80 MCS0 */ | |
1952 | if (snr < 5) | |
1953 | return 58500; /* VHT80 MCS1 */ | |
1954 | if (snr < 9) | |
1955 | return 87800; /* VHT80 MCS2 */ | |
1956 | if (snr < 11) | |
1957 | return 117000; /* VHT80 MCS3 */ | |
1958 | if (snr < 15) | |
1959 | return 175500; /* VHT80 MCS4 */ | |
1960 | if (snr < 16) | |
1961 | return 234000; /* VHT80 MCS5 */ | |
1962 | if (snr < 18) | |
1963 | return 263300; /* VHT80 MCS6 */ | |
1964 | if (snr < 20) | |
1965 | return 292500; /* VHT80 MCS7 */ | |
1966 | if (snr < 22) | |
1967 | return 351000; /* VHT80 MCS8 */ | |
1968 | return 390000; /* VHT80 MCS9 */ | |
1969 | } | |
1970 | ||
1971 | ||
1972 | static void scan_est_throughput(struct wpa_supplicant *wpa_s, | |
1973 | struct wpa_scan_res *res) | |
1974 | { | |
1975 | enum local_hw_capab capab = wpa_s->hw_capab; | |
1976 | int rate; /* max legacy rate in 500 kb/s units */ | |
1977 | const u8 *ie; | |
1978 | unsigned int est, tmp; | |
1979 | int snr = res->snr; | |
1980 | ||
1981 | if (res->est_throughput) | |
1982 | return; | |
1983 | ||
1984 | /* Get maximum legacy rate */ | |
1985 | rate = wpa_scan_get_max_rate(res); | |
1986 | ||
1987 | /* Limit based on estimated SNR */ | |
1988 | if (rate > 1 * 2 && snr < 1) | |
1989 | rate = 1 * 2; | |
1990 | else if (rate > 2 * 2 && snr < 4) | |
1991 | rate = 2 * 2; | |
1992 | else if (rate > 6 * 2 && snr < 5) | |
1993 | rate = 6 * 2; | |
1994 | else if (rate > 9 * 2 && snr < 6) | |
1995 | rate = 9 * 2; | |
1996 | else if (rate > 12 * 2 && snr < 7) | |
1997 | rate = 12 * 2; | |
1998 | else if (rate > 18 * 2 && snr < 10) | |
1999 | rate = 18 * 2; | |
2000 | else if (rate > 24 * 2 && snr < 11) | |
2001 | rate = 24 * 2; | |
2002 | else if (rate > 36 * 2 && snr < 15) | |
2003 | rate = 36 * 2; | |
2004 | else if (rate > 48 * 2 && snr < 19) | |
2005 | rate = 48 * 2; | |
2006 | else if (rate > 54 * 2 && snr < 21) | |
2007 | rate = 54 * 2; | |
2008 | est = rate * 500; | |
2009 | ||
2010 | if (capab == CAPAB_HT || capab == CAPAB_HT40 || capab == CAPAB_VHT) { | |
2011 | ie = wpa_scan_get_ie(res, WLAN_EID_HT_CAP); | |
2012 | if (ie) { | |
2013 | tmp = max_ht20_rate(snr); | |
2014 | if (tmp > est) | |
2015 | est = tmp; | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | if (capab == CAPAB_HT40 || capab == CAPAB_VHT) { | |
2020 | ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION); | |
2021 | if (ie && ie[1] >= 2 && | |
2022 | (ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { | |
2023 | tmp = max_ht40_rate(snr); | |
2024 | if (tmp > est) | |
2025 | est = tmp; | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | if (capab == CAPAB_VHT) { | |
2030 | /* Use +1 to assume VHT is always faster than HT */ | |
2031 | ie = wpa_scan_get_ie(res, WLAN_EID_VHT_CAP); | |
2032 | if (ie) { | |
2033 | tmp = max_ht20_rate(snr) + 1; | |
2034 | if (tmp > est) | |
2035 | est = tmp; | |
2036 | ||
2037 | ie = wpa_scan_get_ie(res, WLAN_EID_HT_OPERATION); | |
2038 | if (ie && ie[1] >= 2 && | |
2039 | (ie[3] & | |
2040 | HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)) { | |
2041 | tmp = max_ht40_rate(snr) + 1; | |
2042 | if (tmp > est) | |
2043 | est = tmp; | |
2044 | } | |
2045 | ||
2046 | ie = wpa_scan_get_ie(res, WLAN_EID_VHT_OPERATION); | |
2047 | if (ie && ie[1] >= 1 && | |
2048 | (ie[2] & VHT_OPMODE_CHANNEL_WIDTH_MASK)) { | |
2049 | tmp = max_vht80_rate(snr) + 1; | |
2050 | if (tmp > est) | |
2051 | est = tmp; | |
2052 | } | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | /* TODO: channel utilization and AP load (e.g., from AP Beacon) */ | |
2057 | ||
2058 | res->est_throughput = est; | |
2059 | } | |
2060 | ||
2061 | ||
9ba9fa07 JM |
2062 | /** |
2063 | * wpa_supplicant_get_scan_results - Get scan results | |
2064 | * @wpa_s: Pointer to wpa_supplicant data | |
2065 | * @info: Information about what was scanned or %NULL if not available | |
2066 | * @new_scan: Whether a new scan was performed | |
2067 | * Returns: Scan results, %NULL on failure | |
2068 | * | |
2069 | * This function request the current scan results from the driver and updates | |
2070 | * the local BSS list wpa_s->bss. The caller is responsible for freeing the | |
2071 | * results with wpa_scan_results_free(). | |
2072 | */ | |
2073 | struct wpa_scan_results * | |
2074 | wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s, | |
2075 | struct scan_info *info, int new_scan) | |
2076 | { | |
2077 | struct wpa_scan_results *scan_res; | |
2078 | size_t i; | |
41e650ae | 2079 | int (*compar)(const void *, const void *) = wpa_scan_result_compar; |
9ba9fa07 | 2080 | |
17fbb751 | 2081 | scan_res = wpa_drv_get_scan_results2(wpa_s); |
9ba9fa07 | 2082 | if (scan_res == NULL) { |
f049052b | 2083 | wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results"); |
9ba9fa07 JM |
2084 | return NULL; |
2085 | } | |
c5f10e80 JM |
2086 | if (scan_res->fetch_time.sec == 0) { |
2087 | /* | |
2088 | * Make sure we have a valid timestamp if the driver wrapper | |
2089 | * does not set this. | |
2090 | */ | |
acb69cec | 2091 | os_get_reltime(&scan_res->fetch_time); |
c5f10e80 | 2092 | } |
d445a5cd | 2093 | filter_scan_res(wpa_s, scan_res); |
9ba9fa07 | 2094 | |
f0d0a5d2 MA |
2095 | for (i = 0; i < scan_res->num; i++) { |
2096 | struct wpa_scan_res *scan_res_item = scan_res->res[i]; | |
2097 | ||
a1b790eb JM |
2098 | scan_snr(scan_res_item); |
2099 | scan_est_throughput(wpa_s, scan_res_item); | |
f0d0a5d2 MA |
2100 | } |
2101 | ||
41e650ae | 2102 | #ifdef CONFIG_WPS |
3187fd90 | 2103 | if (wpas_wps_searching(wpa_s)) { |
f049052b BG |
2104 | wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS " |
2105 | "provisioning rules"); | |
41e650ae JM |
2106 | compar = wpa_scan_result_wps_compar; |
2107 | } | |
2108 | #endif /* CONFIG_WPS */ | |
2109 | ||
9ba9fa07 | 2110 | qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *), |
41e650ae | 2111 | compar); |
aa820e02 | 2112 | dump_scan_res(scan_res); |
9ba9fa07 JM |
2113 | |
2114 | wpa_bss_update_start(wpa_s); | |
2115 | for (i = 0; i < scan_res->num; i++) | |
c5f10e80 JM |
2116 | wpa_bss_update_scan_res(wpa_s, scan_res->res[i], |
2117 | &scan_res->fetch_time); | |
9ba9fa07 JM |
2118 | wpa_bss_update_end(wpa_s, info, new_scan); |
2119 | ||
2120 | return scan_res; | |
2121 | } | |
2122 | ||
2123 | ||
2c09af30 JM |
2124 | /** |
2125 | * wpa_supplicant_update_scan_results - Update scan results from the driver | |
2126 | * @wpa_s: Pointer to wpa_supplicant data | |
2127 | * Returns: 0 on success, -1 on failure | |
2128 | * | |
2129 | * This function updates the BSS table within wpa_supplicant based on the | |
2130 | * currently available scan results from the driver without requesting a new | |
2131 | * scan. This is used in cases where the driver indicates an association | |
2132 | * (including roaming within ESS) and wpa_supplicant does not yet have the | |
2133 | * needed information to complete the connection (e.g., to perform validation | |
2134 | * steps in 4-way handshake). | |
2135 | */ | |
9ba9fa07 JM |
2136 | int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s) |
2137 | { | |
2138 | struct wpa_scan_results *scan_res; | |
2139 | scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); | |
2140 | if (scan_res == NULL) | |
2141 | return -1; | |
2142 | wpa_scan_results_free(scan_res); | |
2143 | ||
2144 | return 0; | |
2145 | } | |
66fe0f70 DS |
2146 | |
2147 | ||
2148 | /** | |
2149 | * scan_only_handler - Reports scan results | |
2150 | */ | |
2151 | void scan_only_handler(struct wpa_supplicant *wpa_s, | |
2152 | struct wpa_scan_results *scan_res) | |
2153 | { | |
2154 | wpa_dbg(wpa_s, MSG_DEBUG, "Scan-only results received"); | |
d81c73be JM |
2155 | if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && |
2156 | wpa_s->manual_scan_use_id && wpa_s->own_scan_running) { | |
2157 | wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u", | |
2158 | wpa_s->manual_scan_id); | |
2159 | wpa_s->manual_scan_use_id = 0; | |
2160 | } else { | |
2161 | wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS); | |
2162 | } | |
66fe0f70 DS |
2163 | wpas_notify_scan_results(wpa_s); |
2164 | wpas_notify_scan_done(wpa_s, 1); | |
d12a51b5 JM |
2165 | if (wpa_s->scan_work) { |
2166 | struct wpa_radio_work *work = wpa_s->scan_work; | |
2167 | wpa_s->scan_work = NULL; | |
2168 | radio_work_done(work); | |
2169 | } | |
ea6030c7 JM |
2170 | |
2171 | if (wpa_s->wpa_state == WPA_SCANNING) | |
2172 | wpa_supplicant_set_state(wpa_s, wpa_s->scan_prev_wpa_state); | |
66fe0f70 | 2173 | } |
407be00b JM |
2174 | |
2175 | ||
2176 | int wpas_scan_scheduled(struct wpa_supplicant *wpa_s) | |
2177 | { | |
2178 | return eloop_is_timeout_registered(wpa_supplicant_scan, wpa_s, NULL); | |
2179 | } | |
dd43aaa5 JM |
2180 | |
2181 | ||
2182 | struct wpa_driver_scan_params * | |
2183 | wpa_scan_clone_params(const struct wpa_driver_scan_params *src) | |
2184 | { | |
2185 | struct wpa_driver_scan_params *params; | |
2186 | size_t i; | |
2187 | u8 *n; | |
2188 | ||
2189 | params = os_zalloc(sizeof(*params)); | |
2190 | if (params == NULL) | |
2191 | return NULL; | |
2192 | ||
2193 | for (i = 0; i < src->num_ssids; i++) { | |
2194 | if (src->ssids[i].ssid) { | |
2195 | n = os_malloc(src->ssids[i].ssid_len); | |
2196 | if (n == NULL) | |
2197 | goto failed; | |
2198 | os_memcpy(n, src->ssids[i].ssid, | |
2199 | src->ssids[i].ssid_len); | |
2200 | params->ssids[i].ssid = n; | |
2201 | params->ssids[i].ssid_len = src->ssids[i].ssid_len; | |
2202 | } | |
2203 | } | |
2204 | params->num_ssids = src->num_ssids; | |
2205 | ||
2206 | if (src->extra_ies) { | |
2207 | n = os_malloc(src->extra_ies_len); | |
2208 | if (n == NULL) | |
2209 | goto failed; | |
2210 | os_memcpy(n, src->extra_ies, src->extra_ies_len); | |
2211 | params->extra_ies = n; | |
2212 | params->extra_ies_len = src->extra_ies_len; | |
2213 | } | |
2214 | ||
2215 | if (src->freqs) { | |
2216 | int len = int_array_len(src->freqs); | |
2217 | params->freqs = os_malloc((len + 1) * sizeof(int)); | |
2218 | if (params->freqs == NULL) | |
2219 | goto failed; | |
2220 | os_memcpy(params->freqs, src->freqs, (len + 1) * sizeof(int)); | |
2221 | } | |
2222 | ||
2223 | if (src->filter_ssids) { | |
fd67275b | 2224 | params->filter_ssids = os_malloc(sizeof(*params->filter_ssids) * |
dd43aaa5 JM |
2225 | src->num_filter_ssids); |
2226 | if (params->filter_ssids == NULL) | |
2227 | goto failed; | |
2228 | os_memcpy(params->filter_ssids, src->filter_ssids, | |
fd67275b EL |
2229 | sizeof(*params->filter_ssids) * |
2230 | src->num_filter_ssids); | |
dd43aaa5 JM |
2231 | params->num_filter_ssids = src->num_filter_ssids; |
2232 | } | |
2233 | ||
2234 | params->filter_rssi = src->filter_rssi; | |
2235 | params->p2p_probe = src->p2p_probe; | |
2236 | params->only_new_results = src->only_new_results; | |
57a8f8af | 2237 | params->low_priority = src->low_priority; |
dd43aaa5 | 2238 | |
09ea4309 AS |
2239 | if (src->sched_scan_plans_num > 0) { |
2240 | params->sched_scan_plans = | |
2241 | os_malloc(sizeof(*src->sched_scan_plans) * | |
2242 | src->sched_scan_plans_num); | |
2243 | if (!params->sched_scan_plans) | |
2244 | goto failed; | |
2245 | ||
2246 | os_memcpy(params->sched_scan_plans, src->sched_scan_plans, | |
2247 | sizeof(*src->sched_scan_plans) * | |
2248 | src->sched_scan_plans_num); | |
2249 | params->sched_scan_plans_num = src->sched_scan_plans_num; | |
2250 | } | |
2251 | ||
56c76fa5 IP |
2252 | if (src->mac_addr_rand) { |
2253 | params->mac_addr_rand = src->mac_addr_rand; | |
2254 | ||
2255 | if (src->mac_addr && src->mac_addr_mask) { | |
2256 | u8 *mac_addr; | |
2257 | ||
2258 | mac_addr = os_malloc(2 * ETH_ALEN); | |
2259 | if (!mac_addr) | |
2260 | goto failed; | |
2261 | ||
2262 | os_memcpy(mac_addr, src->mac_addr, ETH_ALEN); | |
2263 | os_memcpy(mac_addr + ETH_ALEN, src->mac_addr_mask, | |
2264 | ETH_ALEN); | |
2265 | params->mac_addr = mac_addr; | |
2266 | params->mac_addr_mask = mac_addr + ETH_ALEN; | |
2267 | } | |
2268 | } | |
dd43aaa5 JM |
2269 | return params; |
2270 | ||
2271 | failed: | |
2272 | wpa_scan_free_params(params); | |
2273 | return NULL; | |
2274 | } | |
2275 | ||
2276 | ||
2277 | void wpa_scan_free_params(struct wpa_driver_scan_params *params) | |
2278 | { | |
2279 | size_t i; | |
2280 | ||
2281 | if (params == NULL) | |
2282 | return; | |
2283 | ||
2284 | for (i = 0; i < params->num_ssids; i++) | |
2285 | os_free((u8 *) params->ssids[i].ssid); | |
2286 | os_free((u8 *) params->extra_ies); | |
2287 | os_free(params->freqs); | |
2288 | os_free(params->filter_ssids); | |
09ea4309 | 2289 | os_free(params->sched_scan_plans); |
56c76fa5 IP |
2290 | |
2291 | /* | |
2292 | * Note: params->mac_addr_mask points to same memory allocation and | |
2293 | * must not be freed separately. | |
2294 | */ | |
2295 | os_free((u8 *) params->mac_addr); | |
2296 | ||
dd43aaa5 JM |
2297 | os_free(params); |
2298 | } | |
737e7a08 AB |
2299 | |
2300 | ||
2301 | int wpas_start_pno(struct wpa_supplicant *wpa_s) | |
2302 | { | |
32c02261 | 2303 | int ret, prio; |
4ed34922 | 2304 | size_t i, num_ssid, num_match_ssid; |
737e7a08 AB |
2305 | struct wpa_ssid *ssid; |
2306 | struct wpa_driver_scan_params params; | |
32c02261 | 2307 | struct sched_scan_plan scan_plan; |
737e7a08 | 2308 | |
5e3ddf4d AB |
2309 | if (!wpa_s->sched_scan_supported) |
2310 | return -1; | |
2311 | ||
737e7a08 AB |
2312 | if (wpa_s->pno || wpa_s->pno_sched_pending) |
2313 | return 0; | |
2314 | ||
2315 | if ((wpa_s->wpa_state > WPA_SCANNING) && | |
2316 | (wpa_s->wpa_state <= WPA_COMPLETED)) { | |
2317 | wpa_printf(MSG_ERROR, "PNO: In assoc process"); | |
2318 | return -EAGAIN; | |
2319 | } | |
2320 | ||
2321 | if (wpa_s->wpa_state == WPA_SCANNING) { | |
2322 | wpa_supplicant_cancel_scan(wpa_s); | |
2323 | if (wpa_s->sched_scanning) { | |
2324 | wpa_printf(MSG_DEBUG, "Schedule PNO on completion of " | |
2325 | "ongoing sched scan"); | |
2326 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
2327 | wpa_s->pno_sched_pending = 1; | |
2328 | return 0; | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | os_memset(¶ms, 0, sizeof(params)); | |
2333 | ||
4ed34922 | 2334 | num_ssid = num_match_ssid = 0; |
737e7a08 AB |
2335 | ssid = wpa_s->conf->ssid; |
2336 | while (ssid) { | |
4ed34922 DS |
2337 | if (!wpas_network_disabled(wpa_s, ssid)) { |
2338 | num_match_ssid++; | |
2339 | if (ssid->scan_ssid) | |
2340 | num_ssid++; | |
2341 | } | |
737e7a08 AB |
2342 | ssid = ssid->next; |
2343 | } | |
4ed34922 DS |
2344 | |
2345 | if (num_match_ssid == 0) { | |
2346 | wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs"); | |
2347 | return -1; | |
2348 | } | |
2349 | ||
2350 | if (num_match_ssid > num_ssid) { | |
2351 | params.num_ssids++; /* wildcard */ | |
2352 | num_ssid++; | |
2353 | } | |
2354 | ||
737e7a08 AB |
2355 | if (num_ssid > WPAS_MAX_SCAN_SSIDS) { |
2356 | wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from " | |
2357 | "%u", WPAS_MAX_SCAN_SSIDS, (unsigned int) num_ssid); | |
2358 | num_ssid = WPAS_MAX_SCAN_SSIDS; | |
2359 | } | |
2360 | ||
4ed34922 DS |
2361 | if (num_match_ssid > wpa_s->max_match_sets) { |
2362 | num_match_ssid = wpa_s->max_match_sets; | |
2363 | wpa_dbg(wpa_s, MSG_DEBUG, "PNO: Too many SSIDs to match"); | |
737e7a08 | 2364 | } |
4ed34922 DS |
2365 | params.filter_ssids = os_calloc(num_match_ssid, |
2366 | sizeof(struct wpa_driver_scan_filter)); | |
737e7a08 AB |
2367 | if (params.filter_ssids == NULL) |
2368 | return -1; | |
6f5e1b0b | 2369 | |
737e7a08 | 2370 | i = 0; |
6f5e1b0b DS |
2371 | prio = 0; |
2372 | ssid = wpa_s->conf->pssid[prio]; | |
737e7a08 AB |
2373 | while (ssid) { |
2374 | if (!wpas_network_disabled(wpa_s, ssid)) { | |
4ed34922 DS |
2375 | if (ssid->scan_ssid && params.num_ssids < num_ssid) { |
2376 | params.ssids[params.num_ssids].ssid = | |
2377 | ssid->ssid; | |
2378 | params.ssids[params.num_ssids].ssid_len = | |
2379 | ssid->ssid_len; | |
2380 | params.num_ssids++; | |
2381 | } | |
737e7a08 AB |
2382 | os_memcpy(params.filter_ssids[i].ssid, ssid->ssid, |
2383 | ssid->ssid_len); | |
2384 | params.filter_ssids[i].ssid_len = ssid->ssid_len; | |
2385 | params.num_filter_ssids++; | |
2386 | i++; | |
4ed34922 | 2387 | if (i == num_match_ssid) |
737e7a08 AB |
2388 | break; |
2389 | } | |
6f5e1b0b DS |
2390 | if (ssid->pnext) |
2391 | ssid = ssid->pnext; | |
2392 | else if (prio + 1 == wpa_s->conf->num_prio) | |
2393 | break; | |
2394 | else | |
2395 | ssid = wpa_s->conf->pssid[++prio]; | |
737e7a08 AB |
2396 | } |
2397 | ||
2398 | if (wpa_s->conf->filter_rssi) | |
2399 | params.filter_rssi = wpa_s->conf->filter_rssi; | |
2400 | ||
32c02261 AS |
2401 | if (wpa_s->sched_scan_plans_num) { |
2402 | params.sched_scan_plans = wpa_s->sched_scan_plans; | |
2403 | params.sched_scan_plans_num = wpa_s->sched_scan_plans_num; | |
2404 | } else { | |
2405 | /* Set one scan plan that will run infinitely */ | |
2406 | if (wpa_s->conf->sched_scan_interval) | |
2407 | scan_plan.interval = wpa_s->conf->sched_scan_interval; | |
2408 | else | |
2409 | scan_plan.interval = 10; | |
2410 | ||
2411 | scan_plan.iterations = 0; | |
2412 | params.sched_scan_plans = &scan_plan; | |
2413 | params.sched_scan_plans_num = 1; | |
2414 | } | |
737e7a08 | 2415 | |
d3c9c35f DS |
2416 | if (params.freqs == NULL && wpa_s->manual_sched_scan_freqs) { |
2417 | wpa_dbg(wpa_s, MSG_DEBUG, "Limit sched scan to specified channels"); | |
2418 | params.freqs = wpa_s->manual_sched_scan_freqs; | |
2419 | } | |
2420 | ||
56c76fa5 IP |
2421 | if (wpa_s->mac_addr_rand_enable & MAC_ADDR_RAND_PNO) { |
2422 | params.mac_addr_rand = 1; | |
2423 | if (wpa_s->mac_addr_pno) { | |
2424 | params.mac_addr = wpa_s->mac_addr_pno; | |
2425 | params.mac_addr_mask = wpa_s->mac_addr_pno + ETH_ALEN; | |
2426 | } | |
2427 | } | |
2428 | ||
32c02261 | 2429 | ret = wpa_supplicant_start_sched_scan(wpa_s, ¶ms); |
737e7a08 AB |
2430 | os_free(params.filter_ssids); |
2431 | if (ret == 0) | |
2432 | wpa_s->pno = 1; | |
5e3ddf4d AB |
2433 | else |
2434 | wpa_msg(wpa_s, MSG_ERROR, "Failed to schedule PNO"); | |
737e7a08 AB |
2435 | return ret; |
2436 | } | |
2437 | ||
2438 | ||
2439 | int wpas_stop_pno(struct wpa_supplicant *wpa_s) | |
2440 | { | |
2441 | int ret = 0; | |
2442 | ||
5e3ddf4d AB |
2443 | if (!wpa_s->pno) |
2444 | return 0; | |
2445 | ||
2446 | ret = wpa_supplicant_stop_sched_scan(wpa_s); | |
737e7a08 | 2447 | |
5e3ddf4d | 2448 | wpa_s->pno = 0; |
737e7a08 AB |
2449 | wpa_s->pno_sched_pending = 0; |
2450 | ||
2451 | if (wpa_s->wpa_state == WPA_SCANNING) | |
2452 | wpa_supplicant_req_scan(wpa_s, 0, 0); | |
2453 | ||
2454 | return ret; | |
2455 | } | |
56c76fa5 IP |
2456 | |
2457 | ||
2458 | void wpas_mac_addr_rand_scan_clear(struct wpa_supplicant *wpa_s, | |
2459 | unsigned int type) | |
2460 | { | |
2461 | type &= MAC_ADDR_RAND_ALL; | |
2462 | wpa_s->mac_addr_rand_enable &= ~type; | |
2463 | ||
2464 | if (type & MAC_ADDR_RAND_SCAN) { | |
2465 | os_free(wpa_s->mac_addr_scan); | |
2466 | wpa_s->mac_addr_scan = NULL; | |
2467 | } | |
2468 | ||
2469 | if (type & MAC_ADDR_RAND_SCHED_SCAN) { | |
2470 | os_free(wpa_s->mac_addr_sched_scan); | |
2471 | wpa_s->mac_addr_sched_scan = NULL; | |
2472 | } | |
2473 | ||
2474 | if (type & MAC_ADDR_RAND_PNO) { | |
2475 | os_free(wpa_s->mac_addr_pno); | |
2476 | wpa_s->mac_addr_pno = NULL; | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | ||
2481 | int wpas_mac_addr_rand_scan_set(struct wpa_supplicant *wpa_s, | |
2482 | unsigned int type, const u8 *addr, | |
2483 | const u8 *mask) | |
2484 | { | |
2485 | u8 *tmp = NULL; | |
2486 | ||
2487 | wpas_mac_addr_rand_scan_clear(wpa_s, type); | |
2488 | ||
2489 | if (addr) { | |
2490 | tmp = os_malloc(2 * ETH_ALEN); | |
2491 | if (!tmp) | |
2492 | return -1; | |
2493 | os_memcpy(tmp, addr, ETH_ALEN); | |
2494 | os_memcpy(tmp + ETH_ALEN, mask, ETH_ALEN); | |
2495 | } | |
2496 | ||
2497 | if (type == MAC_ADDR_RAND_SCAN) { | |
2498 | wpa_s->mac_addr_scan = tmp; | |
2499 | } else if (type == MAC_ADDR_RAND_SCHED_SCAN) { | |
2500 | wpa_s->mac_addr_sched_scan = tmp; | |
2501 | } else if (type == MAC_ADDR_RAND_PNO) { | |
2502 | wpa_s->mac_addr_pno = tmp; | |
2503 | } else { | |
2504 | wpa_printf(MSG_INFO, | |
2505 | "scan: Invalid MAC randomization type=0x%x", | |
2506 | type); | |
2507 | os_free(tmp); | |
2508 | return -1; | |
2509 | } | |
2510 | ||
2511 | wpa_s->mac_addr_rand_enable |= type; | |
2512 | return 0; | |
2513 | } | |
4ead7cfd KV |
2514 | |
2515 | ||
2516 | int wpas_abort_ongoing_scan(struct wpa_supplicant *wpa_s) | |
2517 | { | |
2518 | if (wpa_s->scan_work && wpa_s->own_scan_running) { | |
2519 | wpa_dbg(wpa_s, MSG_DEBUG, "Abort an ongoing scan"); | |
2520 | return wpa_drv_abort_scan(wpa_s); | |
2521 | } | |
2522 | ||
2523 | return 0; | |
2524 | } | |
32c02261 AS |
2525 | |
2526 | ||
2527 | int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd) | |
2528 | { | |
2529 | struct sched_scan_plan *scan_plans = NULL; | |
2530 | const char *token, *context = NULL; | |
2531 | unsigned int num = 0; | |
2532 | ||
2533 | if (!cmd) | |
2534 | return -1; | |
2535 | ||
bea48f77 JM |
2536 | if (!cmd[0]) { |
2537 | wpa_printf(MSG_DEBUG, "Clear sched scan plans"); | |
2538 | os_free(wpa_s->sched_scan_plans); | |
2539 | wpa_s->sched_scan_plans = NULL; | |
2540 | wpa_s->sched_scan_plans_num = 0; | |
2541 | return 0; | |
2542 | } | |
2543 | ||
32c02261 AS |
2544 | while ((token = cstr_token(cmd, " ", &context))) { |
2545 | int ret; | |
2546 | struct sched_scan_plan *scan_plan, *n; | |
2547 | ||
2548 | n = os_realloc_array(scan_plans, num + 1, sizeof(*scan_plans)); | |
2549 | if (!n) | |
2550 | goto fail; | |
2551 | ||
2552 | scan_plans = n; | |
2553 | scan_plan = &scan_plans[num]; | |
2554 | num++; | |
2555 | ||
2556 | ret = sscanf(token, "%u:%u", &scan_plan->interval, | |
2557 | &scan_plan->iterations); | |
2558 | if (ret <= 0 || ret > 2 || !scan_plan->interval) { | |
2559 | wpa_printf(MSG_ERROR, | |
2560 | "Invalid sched scan plan input: %s", token); | |
2561 | goto fail; | |
2562 | } | |
2563 | ||
2564 | if (!scan_plan->interval) { | |
2565 | wpa_printf(MSG_ERROR, | |
2566 | "scan plan %u: Interval cannot be zero", | |
2567 | num); | |
2568 | goto fail; | |
2569 | } | |
2570 | ||
2571 | if (scan_plan->interval > wpa_s->max_sched_scan_plan_interval) { | |
2572 | wpa_printf(MSG_WARNING, | |
2573 | "scan plan %u: Scan interval too long(%u), use the maximum allowed(%u)", | |
2574 | num, scan_plan->interval, | |
2575 | wpa_s->max_sched_scan_plan_interval); | |
2576 | scan_plan->interval = | |
2577 | wpa_s->max_sched_scan_plan_interval; | |
2578 | } | |
2579 | ||
2580 | if (ret == 1) { | |
2581 | scan_plan->iterations = 0; | |
2582 | break; | |
2583 | } | |
2584 | ||
2585 | if (!scan_plan->iterations) { | |
2586 | wpa_printf(MSG_ERROR, | |
2587 | "scan plan %u: Number of iterations cannot be zero", | |
2588 | num); | |
2589 | goto fail; | |
2590 | } | |
2591 | ||
2592 | if (scan_plan->iterations > | |
2593 | wpa_s->max_sched_scan_plan_iterations) { | |
2594 | wpa_printf(MSG_WARNING, | |
2595 | "scan plan %u: Too many iterations(%u), use the maximum allowed(%u)", | |
2596 | num, scan_plan->iterations, | |
2597 | wpa_s->max_sched_scan_plan_iterations); | |
2598 | scan_plan->iterations = | |
2599 | wpa_s->max_sched_scan_plan_iterations; | |
2600 | } | |
2601 | ||
2602 | wpa_printf(MSG_DEBUG, | |
2603 | "scan plan %u: interval=%u iterations=%u", | |
2604 | num, scan_plan->interval, scan_plan->iterations); | |
2605 | } | |
2606 | ||
2607 | if (!scan_plans) { | |
2608 | wpa_printf(MSG_ERROR, "Invalid scan plans entry"); | |
2609 | goto fail; | |
2610 | } | |
2611 | ||
2612 | if (cstr_token(cmd, " ", &context) || scan_plans[num - 1].iterations) { | |
2613 | wpa_printf(MSG_ERROR, | |
2614 | "All scan plans but the last must specify a number of iterations"); | |
2615 | goto fail; | |
2616 | } | |
2617 | ||
2618 | wpa_printf(MSG_DEBUG, "scan plan %u (last plan): interval=%u", | |
2619 | num, scan_plans[num - 1].interval); | |
2620 | ||
2621 | if (num > wpa_s->max_sched_scan_plans) { | |
2622 | wpa_printf(MSG_WARNING, | |
2623 | "Too many scheduled scan plans (only %u supported)", | |
2624 | wpa_s->max_sched_scan_plans); | |
2625 | wpa_printf(MSG_WARNING, | |
2626 | "Use only the first %u scan plans, and the last one (in infinite loop)", | |
2627 | wpa_s->max_sched_scan_plans - 1); | |
2628 | os_memcpy(&scan_plans[wpa_s->max_sched_scan_plans - 1], | |
2629 | &scan_plans[num - 1], sizeof(*scan_plans)); | |
2630 | num = wpa_s->max_sched_scan_plans; | |
2631 | } | |
2632 | ||
2633 | os_free(wpa_s->sched_scan_plans); | |
2634 | wpa_s->sched_scan_plans = scan_plans; | |
2635 | wpa_s->sched_scan_plans_num = num; | |
2636 | ||
2637 | return 0; | |
2638 | ||
2639 | fail: | |
2640 | os_free(scan_plans); | |
2641 | wpa_printf(MSG_ERROR, "invalid scan plans list"); | |
2642 | return -1; | |
2643 | } |