1 /*
2 * WPA Supplicant
3 * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 *
14 * This file implements functions for registering and unregistering
15 * %wpa_supplicant interfaces. In addition, this file contains number of
16 * functions for managing network connections.
17 */
18
19 #include "includes.h"
20
21 #include "common.h"
22 #include "crypto/random.h"
23 #include "eapol_supp/eapol_supp_sm.h"
24 #include "eap_peer/eap.h"
25 #include "eap_server/eap_methods.h"
26 #include "rsn_supp/wpa.h"
27 #include "eloop.h"
28 #include "config.h"
29 #include "l2_packet/l2_packet.h"
30 #include "wpa_supplicant_i.h"
31 #include "driver_i.h"
32 #include "ctrl_iface.h"
33 #include "pcsc_funcs.h"
34 #include "common/version.h"
35 #include "rsn_supp/preauth.h"
36 #include "rsn_supp/pmksa_cache.h"
37 #include "common/wpa_ctrl.h"
38 #include "mlme.h"
39 #include "common/ieee802_11_defs.h"
40 #include "p2p/p2p.h"
41 #include "blacklist.h"
42 #include "wpas_glue.h"
43 #include "wps_supplicant.h"
44 #include "ibss_rsn.h"
45 #include "sme.h"
46 #include "ap.h"
47 #include "p2p_supplicant.h"
48 #include "notify.h"
49 #include "bgscan.h"
50 #include "bss.h"
51 #include "scan.h"
52
53 const char *wpa_supplicant_version =
54 "wpa_supplicant v" VERSION_STR "\n"
55 "Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> and contributors";
56
57 const char *wpa_supplicant_license =
58 "This program is free software. You can distribute it and/or modify it\n"
59 "under the terms of the GNU General Public License version 2.\n"
60 "\n"
61 "Alternatively, this software may be distributed under the terms of the\n"
62 "BSD license. See README and COPYING for more details.\n"
63 #ifdef EAP_TLS_OPENSSL
64 "\nThis product includes software developed by the OpenSSL Project\n"
65 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
66 #endif /* EAP_TLS_OPENSSL */
67 ;
68
69 #ifndef CONFIG_NO_STDOUT_DEBUG
70 /* Long text divided into parts in order to fit in C89 strings size limits. */
71 const char *wpa_supplicant_full_license1 =
72 "This program is free software; you can redistribute it and/or modify\n"
73 "it under the terms of the GNU General Public License version 2 as\n"
74 "published by the Free Software Foundation.\n"
75 "\n"
76 "This program is distributed in the hope that it will be useful,\n"
77 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
78 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
79 "GNU General Public License for more details.\n"
80 "\n";
81 const char *wpa_supplicant_full_license2 =
82 "You should have received a copy of the GNU General Public License\n"
83 "along with this program; if not, write to the Free Software\n"
84 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n"
85 "\n"
86 "Alternatively, this software may be distributed under the terms of the\n"
87 "BSD license.\n"
88 "\n"
89 "Redistribution and use in source and binary forms, with or without\n"
90 "modification, are permitted provided that the following conditions are\n"
91 "met:\n"
92 "\n";
93 const char *wpa_supplicant_full_license3 =
94 "1. Redistributions of source code must retain the above copyright\n"
95 " notice, this list of conditions and the following disclaimer.\n"
96 "\n"
97 "2. Redistributions in binary form must reproduce the above copyright\n"
98 " notice, this list of conditions and the following disclaimer in the\n"
99 " documentation and/or other materials provided with the distribution.\n"
100 "\n";
101 const char *wpa_supplicant_full_license4 =
102 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
103 " names of its contributors may be used to endorse or promote products\n"
104 " derived from this software without specific prior written permission.\n"
105 "\n"
106 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
107 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
108 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
109 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
110 const char *wpa_supplicant_full_license5 =
111 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
112 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
113 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
114 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
115 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
116 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
117 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
118 "\n";
119 #endif /* CONFIG_NO_STDOUT_DEBUG */
120
121 extern int wpa_debug_level;
122 extern int wpa_debug_show_keys;
123 extern int wpa_debug_timestamp;
124 extern struct wpa_driver_ops *wpa_drivers[];
125
126 /* Configure default/group WEP keys for static WEP */
wpa_set_wep_keys(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)127 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
128 {
129 int i, set = 0;
130
131 for (i = 0; i < NUM_WEP_KEYS; i++) {
132 if (ssid->wep_key_len[i] == 0)
133 continue;
134
135 set = 1;
136 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL,
137 i, i == ssid->wep_tx_keyidx, NULL, 0,
138 ssid->wep_key[i], ssid->wep_key_len[i]);
139 }
140
141 return set;
142 }
143
144
wpa_supplicant_set_wpa_none_key(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)145 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
146 struct wpa_ssid *ssid)
147 {
148 u8 key[32];
149 size_t keylen;
150 enum wpa_alg alg;
151 u8 seq[6] = { 0 };
152
153 /* IBSS/WPA-None uses only one key (Group) for both receiving and
154 * sending unicast and multicast packets. */
155
156 if (ssid->mode != WPAS_MODE_IBSS) {
157 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not "
158 "IBSS/ad-hoc) for WPA-None", ssid->mode);
159 return -1;
160 }
161
162 if (!ssid->psk_set) {
163 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for "
164 "WPA-None");
165 return -1;
166 }
167
168 switch (wpa_s->group_cipher) {
169 case WPA_CIPHER_CCMP:
170 os_memcpy(key, ssid->psk, 16);
171 keylen = 16;
172 alg = WPA_ALG_CCMP;
173 break;
174 case WPA_CIPHER_TKIP:
175 /* WPA-None uses the same Michael MIC key for both TX and RX */
176 os_memcpy(key, ssid->psk, 16 + 8);
177 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
178 keylen = 32;
179 alg = WPA_ALG_TKIP;
180 break;
181 default:
182 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for "
183 "WPA-None", wpa_s->group_cipher);
184 return -1;
185 }
186
187 /* TODO: should actually remember the previously used seq#, both for TX
188 * and RX from each STA.. */
189
190 return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen);
191 }
192
193
wpa_supplicant_timeout(void * eloop_ctx,void * timeout_ctx)194 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
195 {
196 struct wpa_supplicant *wpa_s = eloop_ctx;
197 const u8 *bssid = wpa_s->bssid;
198 if (is_zero_ether_addr(bssid))
199 bssid = wpa_s->pending_bssid;
200 wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
201 MAC2STR(bssid));
202 wpa_blacklist_add(wpa_s, bssid);
203 wpa_sm_notify_disassoc(wpa_s->wpa);
204 wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
205 wpa_s->reassociate = 1;
206
207 /*
208 * If we timed out, the AP or the local radio may be busy.
209 * So, wait a second until scanning again.
210 */
211 wpa_supplicant_req_scan(wpa_s, 1, 0);
212 }
213
214
215 /**
216 * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
217 * @wpa_s: Pointer to wpa_supplicant data
218 * @sec: Number of seconds after which to time out authentication
219 * @usec: Number of microseconds after which to time out authentication
220 *
221 * This function is used to schedule a timeout for the current authentication
222 * attempt.
223 */
wpa_supplicant_req_auth_timeout(struct wpa_supplicant * wpa_s,int sec,int usec)224 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
225 int sec, int usec)
226 {
227 if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
228 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
229 return;
230
231 wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
232 "%d usec", sec, usec);
233 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
234 eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
235 }
236
237
238 /**
239 * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
240 * @wpa_s: Pointer to wpa_supplicant data
241 *
242 * This function is used to cancel authentication timeout scheduled with
243 * wpa_supplicant_req_auth_timeout() and it is called when authentication has
244 * been completed.
245 */
wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant * wpa_s)246 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
247 {
248 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
249 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
250 wpa_blacklist_del(wpa_s, wpa_s->bssid);
251 }
252
253
254 /**
255 * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
256 * @wpa_s: Pointer to wpa_supplicant data
257 *
258 * This function is used to configure EAPOL state machine based on the selected
259 * authentication mode.
260 */
wpa_supplicant_initiate_eapol(struct wpa_supplicant * wpa_s)261 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
262 {
263 #ifdef IEEE8021X_EAPOL
264 struct eapol_config eapol_conf;
265 struct wpa_ssid *ssid = wpa_s->current_ssid;
266
267 #ifdef CONFIG_IBSS_RSN
268 if (ssid->mode == WPAS_MODE_IBSS &&
269 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
270 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
271 /*
272 * RSN IBSS authentication is per-STA and we can disable the
273 * per-BSSID EAPOL authentication.
274 */
275 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
276 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
277 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
278 return;
279 }
280 #endif /* CONFIG_IBSS_RSN */
281
282 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
283 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
284
285 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
286 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
287 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
288 else
289 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
290
291 os_memset(&eapol_conf, 0, sizeof(eapol_conf));
292 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
293 eapol_conf.accept_802_1x_keys = 1;
294 eapol_conf.required_keys = 0;
295 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
296 eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
297 }
298 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
299 eapol_conf.required_keys |=
300 EAPOL_REQUIRE_KEY_BROADCAST;
301 }
302
303 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
304 eapol_conf.required_keys = 0;
305 }
306 if (wpa_s->conf)
307 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
308 eapol_conf.workaround = ssid->eap_workaround;
309 eapol_conf.eap_disabled =
310 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
311 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
312 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
313 eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
314 #endif /* IEEE8021X_EAPOL */
315 }
316
317
318 /**
319 * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
320 * @wpa_s: Pointer to wpa_supplicant data
321 * @ssid: Configuration data for the network
322 *
323 * This function is used to configure WPA state machine and related parameters
324 * to a mode where WPA is not enabled. This is called as part of the
325 * authentication configuration when the selected network does not use WPA.
326 */
wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)327 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
328 struct wpa_ssid *ssid)
329 {
330 int i;
331
332 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
333 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
334 else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
335 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
336 else
337 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
338 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
339 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
340 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
341 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
342 wpa_s->group_cipher = WPA_CIPHER_NONE;
343 wpa_s->mgmt_group_cipher = 0;
344
345 for (i = 0; i < NUM_WEP_KEYS; i++) {
346 if (ssid->wep_key_len[i] > 5) {
347 wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
348 wpa_s->group_cipher = WPA_CIPHER_WEP104;
349 break;
350 } else if (ssid->wep_key_len[i] > 0) {
351 wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
352 wpa_s->group_cipher = WPA_CIPHER_WEP40;
353 break;
354 }
355 }
356
357 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
358 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
359 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
360 wpa_s->pairwise_cipher);
361 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
362 #ifdef CONFIG_IEEE80211W
363 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
364 wpa_s->mgmt_group_cipher);
365 #endif /* CONFIG_IEEE80211W */
366
367 pmksa_cache_clear_current(wpa_s->wpa);
368 }
369
370
wpa_supplicant_cleanup(struct wpa_supplicant * wpa_s)371 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
372 {
373 bgscan_deinit(wpa_s);
374 scard_deinit(wpa_s->scard);
375 wpa_s->scard = NULL;
376 wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
377 eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
378 l2_packet_deinit(wpa_s->l2);
379 wpa_s->l2 = NULL;
380 if (wpa_s->l2_br) {
381 l2_packet_deinit(wpa_s->l2_br);
382 wpa_s->l2_br = NULL;
383 }
384
385 if (wpa_s->conf != NULL) {
386 struct wpa_ssid *ssid;
387 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
388 wpas_notify_network_removed(wpa_s, ssid);
389 }
390
391 os_free(wpa_s->confname);
392 wpa_s->confname = NULL;
393
394 wpa_sm_set_eapol(wpa_s->wpa, NULL);
395 eapol_sm_deinit(wpa_s->eapol);
396 wpa_s->eapol = NULL;
397
398 rsn_preauth_deinit(wpa_s->wpa);
399
400 #ifdef CONFIG_TDLS
401 wpa_tdls_deinit(wpa_s->wpa);
402 #endif /* CONFIG_TDLS */
403
404 pmksa_candidate_free(wpa_s->wpa);
405 wpa_sm_deinit(wpa_s->wpa);
406 wpa_s->wpa = NULL;
407 wpa_blacklist_clear(wpa_s);
408
409 wpa_bss_deinit(wpa_s);
410
411 wpa_supplicant_cancel_scan(wpa_s);
412 wpa_supplicant_cancel_auth_timeout(wpa_s);
413
414 ieee80211_sta_deinit(wpa_s);
415
416 wpas_wps_deinit(wpa_s);
417
418 wpabuf_free(wpa_s->pending_eapol_rx);
419 wpa_s->pending_eapol_rx = NULL;
420
421 #ifdef CONFIG_IBSS_RSN
422 ibss_rsn_deinit(wpa_s->ibss_rsn);
423 wpa_s->ibss_rsn = NULL;
424 #endif /* CONFIG_IBSS_RSN */
425
426 sme_deinit(wpa_s);
427
428 #ifdef CONFIG_AP
429 wpa_supplicant_ap_deinit(wpa_s);
430 #endif /* CONFIG_AP */
431
432 #ifdef CONFIG_P2P
433 wpas_p2p_deinit(wpa_s);
434 #endif /* CONFIG_P2P */
435
436 os_free(wpa_s->next_scan_freqs);
437 wpa_s->next_scan_freqs = NULL;
438 }
439
440
441 /**
442 * wpa_clear_keys - Clear keys configured for the driver
443 * @wpa_s: Pointer to wpa_supplicant data
444 * @addr: Previously used BSSID or %NULL if not available
445 *
446 * This function clears the encryption keys that has been previously configured
447 * for the driver.
448 */
wpa_clear_keys(struct wpa_supplicant * wpa_s,const u8 * addr)449 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
450 {
451 if (wpa_s->keys_cleared) {
452 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
453 * timing issues with keys being cleared just before new keys
454 * are set or just after association or something similar. This
455 * shows up in group key handshake failing often because of the
456 * client not receiving the first encrypted packets correctly.
457 * Skipping some of the extra key clearing steps seems to help
458 * in completing group key handshake more reliably. */
459 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - "
460 "skip key clearing");
461 return;
462 }
463
464 /* MLME-DELETEKEYS.request */
465 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0);
466 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0);
467 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0);
468 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0);
469 #ifdef CONFIG_IEEE80211W
470 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0);
471 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0);
472 #endif /* CONFIG_IEEE80211W */
473 if (addr) {
474 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
475 0);
476 /* MLME-SETPROTECTION.request(None) */
477 wpa_drv_mlme_setprotection(
478 wpa_s, addr,
479 MLME_SETPROTECTION_PROTECT_TYPE_NONE,
480 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
481 }
482 wpa_s->keys_cleared = 1;
483 }
484
485
486 /**
487 * wpa_supplicant_state_txt - Get the connection state name as a text string
488 * @state: State (wpa_state; WPA_*)
489 * Returns: The state name as a printable text string
490 */
wpa_supplicant_state_txt(enum wpa_states state)491 const char * wpa_supplicant_state_txt(enum wpa_states state)
492 {
493 switch (state) {
494 case WPA_DISCONNECTED:
495 return "DISCONNECTED";
496 case WPA_INACTIVE:
497 return "INACTIVE";
498 case WPA_INTERFACE_DISABLED:
499 return "INTERFACE_DISABLED";
500 case WPA_SCANNING:
501 return "SCANNING";
502 case WPA_AUTHENTICATING:
503 return "AUTHENTICATING";
504 case WPA_ASSOCIATING:
505 return "ASSOCIATING";
506 case WPA_ASSOCIATED:
507 return "ASSOCIATED";
508 case WPA_4WAY_HANDSHAKE:
509 return "4WAY_HANDSHAKE";
510 case WPA_GROUP_HANDSHAKE:
511 return "GROUP_HANDSHAKE";
512 case WPA_COMPLETED:
513 return "COMPLETED";
514 default:
515 return "UNKNOWN";
516 }
517 }
518
519
520 #ifdef CONFIG_BGSCAN
521
wpa_supplicant_start_bgscan(struct wpa_supplicant * wpa_s)522 static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s)
523 {
524 if (wpa_s->current_ssid == wpa_s->bgscan_ssid)
525 return;
526
527 bgscan_deinit(wpa_s);
528 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
529 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
530 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
531 "bgscan");
532 /*
533 * Live without bgscan; it is only used as a roaming
534 * optimization, so the initial connection is not
535 * affected.
536 */
537 } else
538 wpa_s->bgscan_ssid = wpa_s->current_ssid;
539 } else
540 wpa_s->bgscan_ssid = NULL;
541 }
542
543
wpa_supplicant_stop_bgscan(struct wpa_supplicant * wpa_s)544 static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s)
545 {
546 if (wpa_s->bgscan_ssid != NULL) {
547 bgscan_deinit(wpa_s);
548 wpa_s->bgscan_ssid = NULL;
549 }
550 }
551
552 #endif /* CONFIG_BGSCAN */
553
554
555 /**
556 * wpa_supplicant_set_state - Set current connection state
557 * @wpa_s: Pointer to wpa_supplicant data
558 * @state: The new connection state
559 *
560 * This function is called whenever the connection state changes, e.g.,
561 * association is completed for WPA/WPA2 4-Way Handshake is started.
562 */
wpa_supplicant_set_state(struct wpa_supplicant * wpa_s,enum wpa_states state)563 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
564 enum wpa_states state)
565 {
566 enum wpa_states old_state = wpa_s->wpa_state;
567
568 wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s",
569 wpa_supplicant_state_txt(wpa_s->wpa_state),
570 wpa_supplicant_state_txt(state));
571
572 if (state != WPA_SCANNING)
573 wpa_supplicant_notify_scanning(wpa_s, 0);
574
575 if (state == WPA_COMPLETED && wpa_s->new_connection) {
576 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
577 struct wpa_ssid *ssid = wpa_s->current_ssid;
578 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
579 MACSTR " completed %s [id=%d id_str=%s]",
580 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
581 "(reauth)" : "(auth)",
582 ssid ? ssid->id : -1,
583 ssid && ssid->id_str ? ssid->id_str : "");
584 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
585 wpa_s->new_connection = 0;
586 wpa_s->reassociated_connection = 1;
587 wpa_drv_set_operstate(wpa_s, 1);
588 #ifndef IEEE8021X_EAPOL
589 wpa_drv_set_supp_port(wpa_s, 1);
590 #endif /* IEEE8021X_EAPOL */
591 wpa_s->after_wps = 0;
592 #ifdef CONFIG_P2P
593 wpas_p2p_completed(wpa_s);
594 #endif /* CONFIG_P2P */
595 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
596 state == WPA_ASSOCIATED) {
597 wpa_s->new_connection = 1;
598 wpa_drv_set_operstate(wpa_s, 0);
599 #ifndef IEEE8021X_EAPOL
600 wpa_drv_set_supp_port(wpa_s, 0);
601 #endif /* IEEE8021X_EAPOL */
602 }
603 wpa_s->wpa_state = state;
604
605 #ifdef CONFIG_BGSCAN
606 if (state == WPA_COMPLETED)
607 wpa_supplicant_start_bgscan(wpa_s);
608 else
609 wpa_supplicant_stop_bgscan(wpa_s);
610 #endif /* CONFIG_BGSCAN */
611
612 if (wpa_s->wpa_state != old_state) {
613 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
614
615 if (wpa_s->wpa_state == WPA_COMPLETED ||
616 old_state == WPA_COMPLETED)
617 wpas_notify_auth_changed(wpa_s);
618 }
619 }
620
621
wpa_supplicant_terminate_proc(struct wpa_global * global)622 void wpa_supplicant_terminate_proc(struct wpa_global *global)
623 {
624 int pending = 0;
625 #ifdef CONFIG_WPS
626 struct wpa_supplicant *wpa_s = global->ifaces;
627 while (wpa_s) {
628 if (wpas_wps_terminate_pending(wpa_s) == 1)
629 pending = 1;
630 wpa_s = wpa_s->next;
631 }
632 #endif /* CONFIG_WPS */
633 if (pending)
634 return;
635 eloop_terminate();
636 }
637
638
wpa_supplicant_terminate(int sig,void * signal_ctx)639 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
640 {
641 struct wpa_global *global = signal_ctx;
642 struct wpa_supplicant *wpa_s;
643 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
644 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
645 "received", sig);
646 }
647 wpa_supplicant_terminate_proc(global);
648 }
649
650
wpa_supplicant_clear_status(struct wpa_supplicant * wpa_s)651 void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
652 {
653 enum wpa_states old_state = wpa_s->wpa_state;
654
655 wpa_s->pairwise_cipher = 0;
656 wpa_s->group_cipher = 0;
657 wpa_s->mgmt_group_cipher = 0;
658 wpa_s->key_mgmt = 0;
659 if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED)
660 wpa_s->wpa_state = WPA_DISCONNECTED;
661
662 if (wpa_s->wpa_state != old_state)
663 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
664 }
665
666
667 /**
668 * wpa_supplicant_reload_configuration - Reload configuration data
669 * @wpa_s: Pointer to wpa_supplicant data
670 * Returns: 0 on success or -1 if configuration parsing failed
671 *
672 * This function can be used to request that the configuration data is reloaded
673 * (e.g., after configuration file change). This function is reloading
674 * configuration only for one interface, so this may need to be called multiple
675 * times if %wpa_supplicant is controlling multiple interfaces and all
676 * interfaces need reconfiguration.
677 */
wpa_supplicant_reload_configuration(struct wpa_supplicant * wpa_s)678 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
679 {
680 struct wpa_config *conf;
681 struct wpa_ssid *old_ssid;
682 int reconf_ctrl;
683 int old_ap_scan;
684
685 if (wpa_s->confname == NULL)
686 return -1;
687 conf = wpa_config_read(wpa_s->confname);
688 if (conf == NULL) {
689 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
690 "file '%s' - exiting", wpa_s->confname);
691 return -1;
692 }
693 conf->changed_parameters = (unsigned int) -1;
694
695 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
696 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
697 os_strcmp(conf->ctrl_interface,
698 wpa_s->conf->ctrl_interface) != 0);
699
700 if (reconf_ctrl && wpa_s->ctrl_iface) {
701 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
702 wpa_s->ctrl_iface = NULL;
703 }
704
705 eapol_sm_invalidate_cached_session(wpa_s->eapol);
706 old_ssid = wpa_s->current_ssid;
707 wpa_s->current_ssid = NULL;
708 if (old_ssid != wpa_s->current_ssid)
709 wpas_notify_network_changed(wpa_s);
710
711 /*
712 * TODO: should notify EAPOL SM about changes in opensc_engine_path,
713 * pkcs11_engine_path, pkcs11_module_path.
714 */
715 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
716 /*
717 * Clear forced success to clear EAP state for next
718 * authentication.
719 */
720 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
721 }
722 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
723 wpa_sm_set_config(wpa_s->wpa, NULL);
724 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
725 rsn_preauth_deinit(wpa_s->wpa);
726
727 old_ap_scan = wpa_s->conf->ap_scan;
728 wpa_config_free(wpa_s->conf);
729 wpa_s->conf = conf;
730 if (old_ap_scan != wpa_s->conf->ap_scan)
731 wpas_notify_ap_scan_changed(wpa_s);
732
733 if (reconf_ctrl)
734 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
735
736 wpa_supplicant_update_config(wpa_s);
737
738 wpa_supplicant_clear_status(wpa_s);
739 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
740 wpa_s->reassociate = 1;
741 wpa_supplicant_req_scan(wpa_s, 0, 0);
742 }
743 wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
744 return 0;
745 }
746
747
wpa_supplicant_reconfig(int sig,void * signal_ctx)748 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
749 {
750 struct wpa_global *global = signal_ctx;
751 struct wpa_supplicant *wpa_s;
752 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
753 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring",
754 sig);
755 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
756 wpa_supplicant_terminate_proc(global);
757 }
758 }
759 }
760
761
cipher_suite2driver(int cipher)762 enum wpa_cipher cipher_suite2driver(int cipher)
763 {
764 switch (cipher) {
765 case WPA_CIPHER_NONE:
766 return CIPHER_NONE;
767 case WPA_CIPHER_WEP40:
768 return CIPHER_WEP40;
769 case WPA_CIPHER_WEP104:
770 return CIPHER_WEP104;
771 case WPA_CIPHER_CCMP:
772 return CIPHER_CCMP;
773 case WPA_CIPHER_TKIP:
774 default:
775 return CIPHER_TKIP;
776 }
777 }
778
779
key_mgmt2driver(int key_mgmt)780 enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
781 {
782 switch (key_mgmt) {
783 case WPA_KEY_MGMT_NONE:
784 return KEY_MGMT_NONE;
785 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
786 return KEY_MGMT_802_1X_NO_WPA;
787 case WPA_KEY_MGMT_IEEE8021X:
788 return KEY_MGMT_802_1X;
789 case WPA_KEY_MGMT_WPA_NONE:
790 return KEY_MGMT_WPA_NONE;
791 case WPA_KEY_MGMT_FT_IEEE8021X:
792 return KEY_MGMT_FT_802_1X;
793 case WPA_KEY_MGMT_FT_PSK:
794 return KEY_MGMT_FT_PSK;
795 case WPA_KEY_MGMT_IEEE8021X_SHA256:
796 return KEY_MGMT_802_1X_SHA256;
797 case WPA_KEY_MGMT_PSK_SHA256:
798 return KEY_MGMT_PSK_SHA256;
799 case WPA_KEY_MGMT_WPS:
800 return KEY_MGMT_WPS;
801 case WPA_KEY_MGMT_PSK:
802 default:
803 return KEY_MGMT_PSK;
804 }
805 }
806
807
wpa_supplicant_suites_from_ai(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,struct wpa_ie_data * ie)808 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
809 struct wpa_ssid *ssid,
810 struct wpa_ie_data *ie)
811 {
812 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
813 if (ret) {
814 if (ret == -2) {
815 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
816 "from association info");
817 }
818 return -1;
819 }
820
821 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set "
822 "cipher suites");
823 if (!(ie->group_cipher & ssid->group_cipher)) {
824 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
825 "cipher 0x%x (mask 0x%x) - reject",
826 ie->group_cipher, ssid->group_cipher);
827 return -1;
828 }
829 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
830 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
831 "cipher 0x%x (mask 0x%x) - reject",
832 ie->pairwise_cipher, ssid->pairwise_cipher);
833 return -1;
834 }
835 if (!(ie->key_mgmt & ssid->key_mgmt)) {
836 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
837 "management 0x%x (mask 0x%x) - reject",
838 ie->key_mgmt, ssid->key_mgmt);
839 return -1;
840 }
841
842 #ifdef CONFIG_IEEE80211W
843 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
844 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
845 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
846 "that does not support management frame protection - "
847 "reject");
848 return -1;
849 }
850 #endif /* CONFIG_IEEE80211W */
851
852 return 0;
853 }
854
855
856 /**
857 * wpa_supplicant_set_suites - Set authentication and encryption parameters
858 * @wpa_s: Pointer to wpa_supplicant data
859 * @bss: Scan results for the selected BSS, or %NULL if not available
860 * @ssid: Configuration data for the selected network
861 * @wpa_ie: Buffer for the WPA/RSN IE
862 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
863 * used buffer length in case the functions returns success.
864 * Returns: 0 on success or -1 on failure
865 *
866 * This function is used to configure authentication and encryption parameters
867 * based on the network configuration and scan result for the selected BSS (if
868 * available).
869 */
wpa_supplicant_set_suites(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,u8 * wpa_ie,size_t * wpa_ie_len)870 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
871 struct wpa_bss *bss, struct wpa_ssid *ssid,
872 u8 *wpa_ie, size_t *wpa_ie_len)
873 {
874 struct wpa_ie_data ie;
875 int sel, proto;
876 const u8 *bss_wpa, *bss_rsn;
877
878 if (bss) {
879 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
880 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
881 } else
882 bss_wpa = bss_rsn = NULL;
883
884 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
885 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
886 (ie.group_cipher & ssid->group_cipher) &&
887 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
888 (ie.key_mgmt & ssid->key_mgmt)) {
889 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
890 proto = WPA_PROTO_RSN;
891 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
892 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
893 (ie.group_cipher & ssid->group_cipher) &&
894 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
895 (ie.key_mgmt & ssid->key_mgmt)) {
896 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
897 proto = WPA_PROTO_WPA;
898 } else if (bss) {
899 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
900 return -1;
901 } else {
902 if (ssid->proto & WPA_PROTO_RSN)
903 proto = WPA_PROTO_RSN;
904 else
905 proto = WPA_PROTO_WPA;
906 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
907 os_memset(&ie, 0, sizeof(ie));
908 ie.group_cipher = ssid->group_cipher;
909 ie.pairwise_cipher = ssid->pairwise_cipher;
910 ie.key_mgmt = ssid->key_mgmt;
911 #ifdef CONFIG_IEEE80211W
912 ie.mgmt_group_cipher =
913 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
914 WPA_CIPHER_AES_128_CMAC : 0;
915 #endif /* CONFIG_IEEE80211W */
916 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites "
917 "based on configuration");
918 } else
919 proto = ie.proto;
920 }
921
922 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d "
923 "pairwise %d key_mgmt %d proto %d",
924 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
925 #ifdef CONFIG_IEEE80211W
926 if (ssid->ieee80211w) {
927 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
928 ie.mgmt_group_cipher);
929 }
930 #endif /* CONFIG_IEEE80211W */
931
932 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
933 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
934 !!(ssid->proto & WPA_PROTO_RSN));
935
936 if (bss || !wpa_s->ap_ies_from_associnfo) {
937 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
938 bss_wpa ? 2 + bss_wpa[1] : 0) ||
939 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
940 bss_rsn ? 2 + bss_rsn[1] : 0))
941 return -1;
942 }
943
944 sel = ie.group_cipher & ssid->group_cipher;
945 if (sel & WPA_CIPHER_CCMP) {
946 wpa_s->group_cipher = WPA_CIPHER_CCMP;
947 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
948 } else if (sel & WPA_CIPHER_TKIP) {
949 wpa_s->group_cipher = WPA_CIPHER_TKIP;
950 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
951 } else if (sel & WPA_CIPHER_WEP104) {
952 wpa_s->group_cipher = WPA_CIPHER_WEP104;
953 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
954 } else if (sel & WPA_CIPHER_WEP40) {
955 wpa_s->group_cipher = WPA_CIPHER_WEP40;
956 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
957 } else {
958 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group "
959 "cipher");
960 return -1;
961 }
962
963 sel = ie.pairwise_cipher & ssid->pairwise_cipher;
964 if (sel & WPA_CIPHER_CCMP) {
965 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
966 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
967 } else if (sel & WPA_CIPHER_TKIP) {
968 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
969 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
970 } else if (sel & WPA_CIPHER_NONE) {
971 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
972 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
973 } else {
974 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise "
975 "cipher");
976 return -1;
977 }
978
979 sel = ie.key_mgmt & ssid->key_mgmt;
980 if (0) {
981 #ifdef CONFIG_IEEE80211R
982 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
983 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
984 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
985 } else if (sel & WPA_KEY_MGMT_FT_PSK) {
986 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
987 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
988 #endif /* CONFIG_IEEE80211R */
989 #ifdef CONFIG_IEEE80211W
990 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
991 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
992 wpa_dbg(wpa_s, MSG_DEBUG,
993 "WPA: using KEY_MGMT 802.1X with SHA256");
994 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
995 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
996 wpa_dbg(wpa_s, MSG_DEBUG,
997 "WPA: using KEY_MGMT PSK with SHA256");
998 #endif /* CONFIG_IEEE80211W */
999 } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
1000 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1001 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
1002 } else if (sel & WPA_KEY_MGMT_PSK) {
1003 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
1004 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
1005 } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
1006 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
1007 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
1008 } else {
1009 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select "
1010 "authenticated key management type");
1011 return -1;
1012 }
1013
1014 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
1015 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
1016 wpa_s->pairwise_cipher);
1017 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
1018
1019 #ifdef CONFIG_IEEE80211W
1020 sel = ie.mgmt_group_cipher;
1021 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
1022 !(ie.capabilities & WPA_CAPABILITY_MFPC))
1023 sel = 0;
1024 if (sel & WPA_CIPHER_AES_128_CMAC) {
1025 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1026 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
1027 "AES-128-CMAC");
1028 } else {
1029 wpa_s->mgmt_group_cipher = 0;
1030 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
1031 }
1032 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
1033 wpa_s->mgmt_group_cipher);
1034 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
1035 #endif /* CONFIG_IEEE80211W */
1036
1037 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
1038 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE");
1039 return -1;
1040 }
1041
1042 if (ssid->key_mgmt &
1043 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
1044 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1045 else
1046 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1047
1048 return 0;
1049 }
1050
1051
1052 /**
1053 * wpa_supplicant_associate - Request association
1054 * @wpa_s: Pointer to wpa_supplicant data
1055 * @bss: Scan results for the selected BSS, or %NULL if not available
1056 * @ssid: Configuration data for the selected network
1057 *
1058 * This function is used to request %wpa_supplicant to associate with a BSS.
1059 */
wpa_supplicant_associate(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid)1060 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1061 struct wpa_bss *bss, struct wpa_ssid *ssid)
1062 {
1063 u8 wpa_ie[200];
1064 size_t wpa_ie_len;
1065 int use_crypt, ret, i, bssid_changed;
1066 int algs = WPA_AUTH_ALG_OPEN;
1067 enum wpa_cipher cipher_pairwise, cipher_group;
1068 struct wpa_driver_associate_params params;
1069 int wep_keys_set = 0;
1070 struct wpa_driver_capa capa;
1071 int assoc_failed = 0;
1072 struct wpa_ssid *old_ssid;
1073
1074 #ifdef CONFIG_IBSS_RSN
1075 ibss_rsn_deinit(wpa_s->ibss_rsn);
1076 wpa_s->ibss_rsn = NULL;
1077 #endif /* CONFIG_IBSS_RSN */
1078
1079 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1080 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1081 #ifdef CONFIG_AP
1082 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1083 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1084 "mode");
1085 return;
1086 }
1087 wpa_supplicant_create_ap(wpa_s, ssid);
1088 wpa_s->current_bss = bss;
1089 #else /* CONFIG_AP */
1090 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1091 "the build");
1092 #endif /* CONFIG_AP */
1093 return;
1094 }
1095
1096 #ifdef CONFIG_TDLS
1097 if (bss)
1098 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
1099 bss->ie_len);
1100 #endif /* CONFIG_TDLS */
1101
1102 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1103 ssid->mode == IEEE80211_MODE_INFRA) {
1104 sme_authenticate(wpa_s, bss, ssid);
1105 return;
1106 }
1107
1108 os_memset(¶ms, 0, sizeof(params));
1109 wpa_s->reassociate = 0;
1110 if (bss) {
1111 #ifdef CONFIG_IEEE80211R
1112 const u8 *ie, *md = NULL;
1113 #endif /* CONFIG_IEEE80211R */
1114 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1115 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1116 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1117 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1118 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1119 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1120 if (bssid_changed)
1121 wpas_notify_bssid_changed(wpa_s);
1122 #ifdef CONFIG_IEEE80211R
1123 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1124 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1125 md = ie + 2;
1126 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1127 if (md) {
1128 /* Prepare for the next transition */
1129 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1130 }
1131 #endif /* CONFIG_IEEE80211R */
1132 #ifdef CONFIG_WPS
1133 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1134 wpa_s->conf->ap_scan == 2 &&
1135 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1136 /* Use ap_scan==1 style network selection to find the network
1137 */
1138 wpa_s->scan_req = 2;
1139 wpa_s->reassociate = 1;
1140 wpa_supplicant_req_scan(wpa_s, 0, 0);
1141 return;
1142 #endif /* CONFIG_WPS */
1143 } else {
1144 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1145 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1146 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1147 }
1148 wpa_supplicant_cancel_scan(wpa_s);
1149
1150 /* Starting new association, so clear the possibly used WPA IE from the
1151 * previous association. */
1152 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1153
1154 #ifdef IEEE8021X_EAPOL
1155 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1156 if (ssid->leap) {
1157 if (ssid->non_leap == 0)
1158 algs = WPA_AUTH_ALG_LEAP;
1159 else
1160 algs |= WPA_AUTH_ALG_LEAP;
1161 }
1162 }
1163 #endif /* IEEE8021X_EAPOL */
1164 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1165 if (ssid->auth_alg) {
1166 algs = ssid->auth_alg;
1167 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1168 "0x%x", algs);
1169 }
1170
1171 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1172 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1173 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1174 WPA_KEY_MGMT_FT_IEEE8021X |
1175 WPA_KEY_MGMT_FT_PSK |
1176 WPA_KEY_MGMT_IEEE8021X_SHA256 |
1177 WPA_KEY_MGMT_PSK_SHA256))) {
1178 int try_opportunistic;
1179 try_opportunistic = ssid->proactive_key_caching &&
1180 (ssid->proto & WPA_PROTO_RSN);
1181 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1182 wpa_s->current_ssid,
1183 try_opportunistic) == 0)
1184 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1185 wpa_ie_len = sizeof(wpa_ie);
1186 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1187 wpa_ie, &wpa_ie_len)) {
1188 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1189 "key management and encryption suites");
1190 return;
1191 }
1192 } else if (ssid->key_mgmt &
1193 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1194 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1195 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1196 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1197 wpa_ie_len = sizeof(wpa_ie);
1198 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1199 wpa_ie, &wpa_ie_len)) {
1200 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1201 "key management and encryption suites (no "
1202 "scan results)");
1203 return;
1204 }
1205 #ifdef CONFIG_WPS
1206 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1207 struct wpabuf *wps_ie;
1208 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1209 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1210 wpa_ie_len = wpabuf_len(wps_ie);
1211 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1212 } else
1213 wpa_ie_len = 0;
1214 wpabuf_free(wps_ie);
1215 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1216 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1217 params.wps = WPS_MODE_PRIVACY;
1218 else
1219 params.wps = WPS_MODE_OPEN;
1220 #endif /* CONFIG_WPS */
1221 } else {
1222 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1223 wpa_ie_len = 0;
1224 }
1225
1226 #ifdef CONFIG_P2P
1227 if (wpa_s->global->p2p) {
1228 u8 *pos;
1229 size_t len;
1230 int res;
1231 int p2p_group;
1232 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1233 pos = wpa_ie + wpa_ie_len;
1234 len = sizeof(wpa_ie) - wpa_ie_len;
1235 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1236 if (res >= 0)
1237 wpa_ie_len += res;
1238 }
1239
1240 wpa_s->cross_connect_disallowed = 0;
1241 if (bss) {
1242 struct wpabuf *p2p;
1243 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1244 if (p2p) {
1245 wpa_s->cross_connect_disallowed =
1246 p2p_get_cross_connect_disallowed(p2p);
1247 wpabuf_free(p2p);
1248 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1249 "connection",
1250 wpa_s->cross_connect_disallowed ?
1251 "disallows" : "allows");
1252 }
1253 }
1254 #endif /* CONFIG_P2P */
1255
1256 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1257 use_crypt = 1;
1258 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1259 cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1260 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1261 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1262 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1263 use_crypt = 0;
1264 if (wpa_set_wep_keys(wpa_s, ssid)) {
1265 use_crypt = 1;
1266 wep_keys_set = 1;
1267 }
1268 }
1269 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1270 use_crypt = 0;
1271
1272 #ifdef IEEE8021X_EAPOL
1273 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1274 if ((ssid->eapol_flags &
1275 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1276 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1277 !wep_keys_set) {
1278 use_crypt = 0;
1279 } else {
1280 /* Assume that dynamic WEP-104 keys will be used and
1281 * set cipher suites in order for drivers to expect
1282 * encryption. */
1283 cipher_pairwise = cipher_group = CIPHER_WEP104;
1284 }
1285 }
1286 #endif /* IEEE8021X_EAPOL */
1287
1288 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1289 /* Set the key before (and later after) association */
1290 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1291 }
1292
1293 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1294 if (bss) {
1295 params.bssid = bss->bssid;
1296 params.ssid = bss->ssid;
1297 params.ssid_len = bss->ssid_len;
1298 params.freq = bss->freq;
1299 } else {
1300 params.ssid = ssid->ssid;
1301 params.ssid_len = ssid->ssid_len;
1302 }
1303 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1304 params.freq == 0)
1305 params.freq = ssid->frequency; /* Initial channel for IBSS */
1306 params.wpa_ie = wpa_ie;
1307 params.wpa_ie_len = wpa_ie_len;
1308 params.pairwise_suite = cipher_pairwise;
1309 params.group_suite = cipher_group;
1310 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1311 params.auth_alg = algs;
1312 params.mode = ssid->mode;
1313 for (i = 0; i < NUM_WEP_KEYS; i++) {
1314 if (ssid->wep_key_len[i])
1315 params.wep_key[i] = ssid->wep_key[i];
1316 params.wep_key_len[i] = ssid->wep_key_len[i];
1317 }
1318 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1319
1320 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1321 (params.key_mgmt_suite == KEY_MGMT_PSK ||
1322 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1323 params.passphrase = ssid->passphrase;
1324 if (ssid->psk_set)
1325 params.psk = ssid->psk;
1326 }
1327
1328 params.drop_unencrypted = use_crypt;
1329
1330 #ifdef CONFIG_IEEE80211W
1331 params.mgmt_frame_protection = ssid->ieee80211w;
1332 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1333 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1334 struct wpa_ie_data ie;
1335 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1336 ie.capabilities &
1337 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1338 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1339 "MFP: require MFP");
1340 params.mgmt_frame_protection =
1341 MGMT_FRAME_PROTECTION_REQUIRED;
1342 }
1343 }
1344 #endif /* CONFIG_IEEE80211W */
1345
1346 #ifdef CONFIG_P2P
1347 if (wpa_s->global->p2p &&
1348 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
1349 params.p2p = 1;
1350 #endif /* CONFIG_P2P */
1351
1352 if (wpa_s->parent->set_sta_uapsd)
1353 params.uapsd = wpa_s->parent->sta_uapsd;
1354 else
1355 params.uapsd = -1;
1356
1357 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1358 ret = ieee80211_sta_associate(wpa_s, ¶ms);
1359 else
1360 ret = wpa_drv_associate(wpa_s, ¶ms);
1361 if (ret < 0) {
1362 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1363 "failed");
1364 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1365 /*
1366 * The driver is known to mean what is saying, so we
1367 * can stop right here; the association will not
1368 * succeed.
1369 */
1370 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1371 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1372 return;
1373 }
1374 /* try to continue anyway; new association will be tried again
1375 * after timeout */
1376 assoc_failed = 1;
1377 }
1378
1379 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1380 /* Set the key after the association just in case association
1381 * cleared the previously configured key. */
1382 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1383 /* No need to timeout authentication since there is no key
1384 * management. */
1385 wpa_supplicant_cancel_auth_timeout(wpa_s);
1386 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1387 #ifdef CONFIG_IBSS_RSN
1388 } else if (ssid->mode == WPAS_MODE_IBSS &&
1389 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1390 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1391 /*
1392 * RSN IBSS authentication is per-STA and we can disable the
1393 * per-BSSID authentication.
1394 */
1395 wpa_supplicant_cancel_auth_timeout(wpa_s);
1396 #endif /* CONFIG_IBSS_RSN */
1397 } else {
1398 /* Timeout for IEEE 802.11 authentication and association */
1399 int timeout = 60;
1400
1401 if (assoc_failed) {
1402 /* give IBSS a bit more time */
1403 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1404 } else if (wpa_s->conf->ap_scan == 1) {
1405 /* give IBSS a bit more time */
1406 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1407 }
1408 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1409 }
1410
1411 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1412 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1413 /* Set static WEP keys again */
1414 wpa_set_wep_keys(wpa_s, ssid);
1415 }
1416
1417 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1418 /*
1419 * Do not allow EAP session resumption between different
1420 * network configurations.
1421 */
1422 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1423 }
1424 old_ssid = wpa_s->current_ssid;
1425 wpa_s->current_ssid = ssid;
1426 wpa_s->current_bss = bss;
1427 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1428 wpa_supplicant_initiate_eapol(wpa_s);
1429 if (old_ssid != wpa_s->current_ssid)
1430 wpas_notify_network_changed(wpa_s);
1431 }
1432
1433
wpa_supplicant_clear_connection(struct wpa_supplicant * wpa_s,const u8 * addr)1434 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1435 const u8 *addr)
1436 {
1437 struct wpa_ssid *old_ssid;
1438
1439 wpa_clear_keys(wpa_s, addr);
1440 wpa_supplicant_mark_disassoc(wpa_s);
1441 old_ssid = wpa_s->current_ssid;
1442 wpa_s->current_ssid = NULL;
1443 wpa_s->current_bss = NULL;
1444 wpa_sm_set_config(wpa_s->wpa, NULL);
1445 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1446 if (old_ssid != wpa_s->current_ssid)
1447 wpas_notify_network_changed(wpa_s);
1448 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1449 }
1450
1451
1452 /**
1453 * wpa_supplicant_disassociate - Disassociate the current connection
1454 * @wpa_s: Pointer to wpa_supplicant data
1455 * @reason_code: IEEE 802.11 reason code for the disassociate frame
1456 *
1457 * This function is used to request %wpa_supplicant to disassociate with the
1458 * current AP.
1459 */
wpa_supplicant_disassociate(struct wpa_supplicant * wpa_s,int reason_code)1460 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1461 int reason_code)
1462 {
1463 u8 *addr = NULL;
1464
1465 if (!is_zero_ether_addr(wpa_s->bssid)) {
1466 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1467 ieee80211_sta_disassociate(wpa_s, reason_code);
1468 else
1469 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1470 addr = wpa_s->bssid;
1471 }
1472
1473 wpa_supplicant_clear_connection(wpa_s, addr);
1474 }
1475
1476
1477 /**
1478 * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1479 * @wpa_s: Pointer to wpa_supplicant data
1480 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1481 *
1482 * This function is used to request %wpa_supplicant to deauthenticate from the
1483 * current AP.
1484 */
wpa_supplicant_deauthenticate(struct wpa_supplicant * wpa_s,int reason_code)1485 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1486 int reason_code)
1487 {
1488 u8 *addr = NULL;
1489
1490 if (!is_zero_ether_addr(wpa_s->bssid)) {
1491 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1492 ieee80211_sta_deauthenticate(wpa_s, reason_code);
1493 else
1494 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1495 reason_code);
1496 addr = wpa_s->bssid;
1497 }
1498
1499 wpa_supplicant_clear_connection(wpa_s, addr);
1500 }
1501
1502
1503 /**
1504 * wpa_supplicant_enable_network - Mark a configured network as enabled
1505 * @wpa_s: wpa_supplicant structure for a network interface
1506 * @ssid: wpa_ssid structure for a configured network or %NULL
1507 *
1508 * Enables the specified network or all networks if no network specified.
1509 */
wpa_supplicant_enable_network(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)1510 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1511 struct wpa_ssid *ssid)
1512 {
1513 struct wpa_ssid *other_ssid;
1514 int was_disabled;
1515
1516 if (ssid == NULL) {
1517 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1518 other_ssid = other_ssid->next) {
1519 if (other_ssid->disabled == 2)
1520 continue; /* do not change persistent P2P group
1521 * data */
1522 if (other_ssid == wpa_s->current_ssid &&
1523 other_ssid->disabled)
1524 wpa_s->reassociate = 1;
1525
1526 was_disabled = other_ssid->disabled;
1527
1528 other_ssid->disabled = 0;
1529
1530 if (was_disabled != other_ssid->disabled)
1531 wpas_notify_network_enabled_changed(
1532 wpa_s, other_ssid);
1533 }
1534 if (wpa_s->reassociate)
1535 wpa_supplicant_req_scan(wpa_s, 0, 0);
1536 } else if (ssid->disabled && ssid->disabled != 2) {
1537 if (wpa_s->current_ssid == NULL) {
1538 /*
1539 * Try to reassociate since there is no current
1540 * configuration and a new network was made available.
1541 */
1542 wpa_s->reassociate = 1;
1543 wpa_supplicant_req_scan(wpa_s, 0, 0);
1544 }
1545
1546 was_disabled = ssid->disabled;
1547
1548 ssid->disabled = 0;
1549
1550 if (was_disabled != ssid->disabled)
1551 wpas_notify_network_enabled_changed(wpa_s, ssid);
1552 }
1553 }
1554
1555
1556 /**
1557 * wpa_supplicant_disable_network - Mark a configured network as disabled
1558 * @wpa_s: wpa_supplicant structure for a network interface
1559 * @ssid: wpa_ssid structure for a configured network or %NULL
1560 *
1561 * Disables the specified network or all networks if no network specified.
1562 */
wpa_supplicant_disable_network(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)1563 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1564 struct wpa_ssid *ssid)
1565 {
1566 struct wpa_ssid *other_ssid;
1567 int was_disabled;
1568
1569 if (ssid == NULL) {
1570 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1571 other_ssid = other_ssid->next) {
1572 was_disabled = other_ssid->disabled;
1573 if (was_disabled == 2)
1574 continue; /* do not change persistent P2P group
1575 * data */
1576
1577 other_ssid->disabled = 1;
1578
1579 if (was_disabled != other_ssid->disabled)
1580 wpas_notify_network_enabled_changed(
1581 wpa_s, other_ssid);
1582 }
1583 if (wpa_s->current_ssid)
1584 wpa_supplicant_disassociate(
1585 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1586 } else if (ssid->disabled != 2) {
1587 if (ssid == wpa_s->current_ssid)
1588 wpa_supplicant_disassociate(
1589 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1590
1591 was_disabled = ssid->disabled;
1592
1593 ssid->disabled = 1;
1594
1595 if (was_disabled != ssid->disabled)
1596 wpas_notify_network_enabled_changed(wpa_s, ssid);
1597 }
1598 }
1599
1600
1601 /**
1602 * wpa_supplicant_select_network - Attempt association with a network
1603 * @wpa_s: wpa_supplicant structure for a network interface
1604 * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1605 */
wpa_supplicant_select_network(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)1606 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1607 struct wpa_ssid *ssid)
1608 {
1609
1610 struct wpa_ssid *other_ssid;
1611
1612 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1613 wpa_supplicant_disassociate(
1614 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1615
1616 /*
1617 * Mark all other networks disabled or mark all networks enabled if no
1618 * network specified.
1619 */
1620 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1621 other_ssid = other_ssid->next) {
1622 int was_disabled = other_ssid->disabled;
1623 if (was_disabled == 2)
1624 continue; /* do not change persistent P2P group data */
1625
1626 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1627
1628 if (was_disabled != other_ssid->disabled)
1629 wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1630 }
1631 wpa_s->connect_without_scan = NULL;
1632 wpa_s->disconnected = 0;
1633 wpa_s->reassociate = 1;
1634 wpa_supplicant_req_scan(wpa_s, 0, 0);
1635
1636 if (ssid)
1637 wpas_notify_network_selected(wpa_s, ssid);
1638 }
1639
1640
1641 /**
1642 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1643 * @wpa_s: wpa_supplicant structure for a network interface
1644 * @ap_scan: AP scan mode
1645 * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1646 *
1647 */
wpa_supplicant_set_ap_scan(struct wpa_supplicant * wpa_s,int ap_scan)1648 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1649 {
1650
1651 int old_ap_scan;
1652
1653 if (ap_scan < 0 || ap_scan > 2)
1654 return -1;
1655
1656 #ifdef ANDROID
1657 if ((ap_scan == 2) && ((wpa_s->wpa_state >= WPA_ASSOCIATING) &&
1658 (wpa_s->wpa_state < WPA_COMPLETED))) {
1659 wpa_printf(MSG_ERROR, "ap_scan = %d (%d)",wpa_s->conf->ap_scan,
1660 ap_scan);
1661 return 0;
1662 }
1663 #endif
1664
1665 old_ap_scan = wpa_s->conf->ap_scan;
1666 wpa_s->conf->ap_scan = ap_scan;
1667
1668 if (old_ap_scan != wpa_s->conf->ap_scan)
1669 wpas_notify_ap_scan_changed(wpa_s);
1670
1671 return 0;
1672 }
1673
1674
1675 /**
1676 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age
1677 * @wpa_s: wpa_supplicant structure for a network interface
1678 * @expire_age: Expiration age in seconds
1679 * Returns: 0 if succeed or -1 if expire_age has an invalid value
1680 *
1681 */
wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant * wpa_s,unsigned int bss_expire_age)1682 int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
1683 unsigned int bss_expire_age)
1684 {
1685 if (bss_expire_age < 10) {
1686 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u",
1687 bss_expire_age);
1688 return -1;
1689 }
1690 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec",
1691 bss_expire_age);
1692 wpa_s->conf->bss_expiration_age = bss_expire_age;
1693
1694 return 0;
1695 }
1696
1697
1698 /**
1699 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count
1700 * @wpa_s: wpa_supplicant structure for a network interface
1701 * @expire_count: number of scans after which an unseen BSS is reclaimed
1702 * Returns: 0 if succeed or -1 if expire_count has an invalid value
1703 *
1704 */
wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant * wpa_s,unsigned int bss_expire_count)1705 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
1706 unsigned int bss_expire_count)
1707 {
1708 if (bss_expire_count < 1) {
1709 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u",
1710 bss_expire_count);
1711 return -1;
1712 }
1713 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u",
1714 bss_expire_count);
1715 wpa_s->conf->bss_expiration_scan_count = bss_expire_count;
1716
1717 return 0;
1718 }
1719
1720
1721 /**
1722 * wpa_supplicant_set_debug_params - Set global debug params
1723 * @global: wpa_global structure
1724 * @debug_level: debug level
1725 * @debug_timestamp: determines if show timestamp in debug data
1726 * @debug_show_keys: determines if show keys in debug data
1727 * Returns: 0 if succeed or -1 if debug_level has wrong value
1728 */
wpa_supplicant_set_debug_params(struct wpa_global * global,int debug_level,int debug_timestamp,int debug_show_keys)1729 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1730 int debug_timestamp, int debug_show_keys)
1731 {
1732
1733 int old_level, old_timestamp, old_show_keys;
1734
1735 /* check for allowed debuglevels */
1736 if (debug_level != MSG_EXCESSIVE &&
1737 debug_level != MSG_MSGDUMP &&
1738 debug_level != MSG_DEBUG &&
1739 debug_level != MSG_INFO &&
1740 debug_level != MSG_WARNING &&
1741 debug_level != MSG_ERROR)
1742 return -1;
1743
1744 old_level = wpa_debug_level;
1745 old_timestamp = wpa_debug_timestamp;
1746 old_show_keys = wpa_debug_show_keys;
1747
1748 wpa_debug_level = debug_level;
1749 wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1750 wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1751
1752 if (wpa_debug_level != old_level)
1753 wpas_notify_debug_level_changed(global);
1754 if (wpa_debug_timestamp != old_timestamp)
1755 wpas_notify_debug_timestamp_changed(global);
1756 if (wpa_debug_show_keys != old_show_keys)
1757 wpas_notify_debug_show_keys_changed(global);
1758
1759 return 0;
1760 }
1761
1762
1763 /**
1764 * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1765 * @wpa_s: Pointer to wpa_supplicant data
1766 * Returns: A pointer to the current network structure or %NULL on failure
1767 */
wpa_supplicant_get_ssid(struct wpa_supplicant * wpa_s)1768 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1769 {
1770 struct wpa_ssid *entry;
1771 u8 ssid[MAX_SSID_LEN];
1772 int res;
1773 size_t ssid_len;
1774 u8 bssid[ETH_ALEN];
1775 int wired;
1776
1777 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1778 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1779 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1780 "MLME");
1781 return NULL;
1782 }
1783 } else {
1784 res = wpa_drv_get_ssid(wpa_s, ssid);
1785 if (res < 0) {
1786 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1787 "driver");
1788 return NULL;
1789 }
1790 ssid_len = res;
1791 }
1792
1793 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1794 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1795 else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1796 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1797 "driver");
1798 return NULL;
1799 }
1800
1801 wired = wpa_s->conf->ap_scan == 0 &&
1802 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1803
1804 entry = wpa_s->conf->ssid;
1805 while (entry) {
1806 if (!entry->disabled &&
1807 ((ssid_len == entry->ssid_len &&
1808 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1809 (!entry->bssid_set ||
1810 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1811 return entry;
1812 #ifdef CONFIG_WPS
1813 if (!entry->disabled &&
1814 (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1815 (entry->ssid == NULL || entry->ssid_len == 0) &&
1816 (!entry->bssid_set ||
1817 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1818 return entry;
1819 #endif /* CONFIG_WPS */
1820 entry = entry->next;
1821 }
1822
1823 return NULL;
1824 }
1825
1826
wpa_supplicant_set_driver(struct wpa_supplicant * wpa_s,const char * name)1827 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1828 const char *name)
1829 {
1830 int i;
1831 size_t len;
1832 const char *pos, *driver = name;
1833
1834 if (wpa_s == NULL)
1835 return -1;
1836
1837 if (wpa_drivers[0] == NULL) {
1838 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1839 "wpa_supplicant");
1840 return -1;
1841 }
1842
1843 if (name == NULL) {
1844 /* default to first driver in the list */
1845 wpa_s->driver = wpa_drivers[0];
1846 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
1847 return 0;
1848 }
1849
1850 do {
1851 pos = os_strchr(driver, ',');
1852 if (pos)
1853 len = pos - driver;
1854 else
1855 len = os_strlen(driver);
1856
1857 for (i = 0; wpa_drivers[i]; i++) {
1858 if (os_strlen(wpa_drivers[i]->name) == len &&
1859 os_strncmp(driver, wpa_drivers[i]->name, len) ==
1860 0) {
1861 wpa_s->driver = wpa_drivers[i];
1862 wpa_s->global_drv_priv =
1863 wpa_s->global->drv_priv[i];
1864 return 0;
1865 }
1866 }
1867
1868 driver = pos + 1;
1869 } while (pos);
1870
1871 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1872 return -1;
1873 }
1874
1875
1876 /**
1877 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1878 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1879 * with struct wpa_driver_ops::init()
1880 * @src_addr: Source address of the EAPOL frame
1881 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1882 * @len: Length of the EAPOL data
1883 *
1884 * This function is called for each received EAPOL frame. Most driver
1885 * interfaces rely on more generic OS mechanism for receiving frames through
1886 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1887 * take care of received EAPOL frames and deliver them to the core supplicant
1888 * code by calling this function.
1889 */
wpa_supplicant_rx_eapol(void * ctx,const u8 * src_addr,const u8 * buf,size_t len)1890 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1891 const u8 *buf, size_t len)
1892 {
1893 struct wpa_supplicant *wpa_s = ctx;
1894
1895 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1896 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1897
1898 if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1899 /*
1900 * There is possible race condition between receiving the
1901 * association event and the EAPOL frame since they are coming
1902 * through different paths from the driver. In order to avoid
1903 * issues in trying to process the EAPOL frame before receiving
1904 * association information, lets queue it for processing until
1905 * the association event is received.
1906 */
1907 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
1908 "of received EAPOL frame");
1909 wpabuf_free(wpa_s->pending_eapol_rx);
1910 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1911 if (wpa_s->pending_eapol_rx) {
1912 os_get_time(&wpa_s->pending_eapol_rx_time);
1913 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1914 ETH_ALEN);
1915 }
1916 return;
1917 }
1918
1919 #ifdef CONFIG_AP
1920 if (wpa_s->ap_iface) {
1921 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1922 return;
1923 }
1924 #endif /* CONFIG_AP */
1925
1926 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1927 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
1928 "no key management is configured");
1929 return;
1930 }
1931
1932 if (wpa_s->eapol_received == 0 &&
1933 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1934 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1935 wpa_s->wpa_state != WPA_COMPLETED) &&
1936 (wpa_s->current_ssid == NULL ||
1937 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
1938 /* Timeout for completing IEEE 802.1X and WPA authentication */
1939 wpa_supplicant_req_auth_timeout(
1940 wpa_s,
1941 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1942 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1943 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1944 70 : 10, 0);
1945 }
1946 wpa_s->eapol_received++;
1947
1948 if (wpa_s->countermeasures) {
1949 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
1950 "EAPOL packet");
1951 return;
1952 }
1953
1954 #ifdef CONFIG_IBSS_RSN
1955 if (wpa_s->current_ssid &&
1956 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
1957 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1958 return;
1959 }
1960 #endif /* CONFIG_IBSS_RSN */
1961
1962 /* Source address of the incoming EAPOL frame could be compared to the
1963 * current BSSID. However, it is possible that a centralized
1964 * Authenticator could be using another MAC address than the BSSID of
1965 * an AP, so just allow any address to be used for now. The replies are
1966 * still sent to the current BSSID (if available), though. */
1967
1968 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1969 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1970 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1971 return;
1972 wpa_drv_poll(wpa_s);
1973 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1974 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1975 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1976 /*
1977 * Set portValid = TRUE here since we are going to skip 4-way
1978 * handshake processing which would normally set portValid. We
1979 * need this to allow the EAPOL state machines to be completed
1980 * without going through EAPOL-Key handshake.
1981 */
1982 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1983 }
1984 }
1985
1986
1987 /**
1988 * wpa_supplicant_driver_init - Initialize driver interface parameters
1989 * @wpa_s: Pointer to wpa_supplicant data
1990 * Returns: 0 on success, -1 on failure
1991 *
1992 * This function is called to initialize driver interface parameters.
1993 * wpa_drv_init() must have been called before this function to initialize the
1994 * driver interface.
1995 */
wpa_supplicant_driver_init(struct wpa_supplicant * wpa_s)1996 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1997 {
1998 static int interface_count = 0;
1999
2000 if (wpa_s->driver->send_eapol) {
2001 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2002 if (addr)
2003 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2004 } else if (!(wpa_s->drv_flags &
2005 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
2006 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
2007 wpa_drv_get_mac_addr(wpa_s),
2008 ETH_P_EAPOL,
2009 wpa_supplicant_rx_eapol, wpa_s, 0);
2010 if (wpa_s->l2 == NULL)
2011 return -1;
2012 } else {
2013 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2014 if (addr)
2015 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2016 }
2017
2018 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
2019 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
2020 return -1;
2021 }
2022
2023 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
2024 MAC2STR(wpa_s->own_addr));
2025
2026 if (wpa_s->bridge_ifname[0]) {
2027 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
2028 "interface '%s'", wpa_s->bridge_ifname);
2029 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
2030 wpa_s->own_addr,
2031 ETH_P_EAPOL,
2032 wpa_supplicant_rx_eapol, wpa_s,
2033 0);
2034 if (wpa_s->l2_br == NULL) {
2035 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
2036 "connection for the bridge interface '%s'",
2037 wpa_s->bridge_ifname);
2038 return -1;
2039 }
2040 }
2041
2042 wpa_clear_keys(wpa_s, NULL);
2043
2044 /* Make sure that TKIP countermeasures are not left enabled (could
2045 * happen if wpa_supplicant is killed during countermeasures. */
2046 wpa_drv_set_countermeasures(wpa_s, 0);
2047
2048 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
2049 wpa_drv_flush_pmkid(wpa_s);
2050
2051 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
2052 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
2053 wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
2054 interface_count++;
2055 } else
2056 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
2057
2058 return 0;
2059 }
2060
2061
wpa_supplicant_daemon(const char * pid_file)2062 static int wpa_supplicant_daemon(const char *pid_file)
2063 {
2064 wpa_printf(MSG_DEBUG, "Daemonize..");
2065 return os_daemonize(pid_file);
2066 }
2067
2068
wpa_supplicant_alloc(void)2069 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2070 {
2071 struct wpa_supplicant *wpa_s;
2072
2073 wpa_s = os_zalloc(sizeof(*wpa_s));
2074 if (wpa_s == NULL)
2075 return NULL;
2076 wpa_s->scan_req = 1;
2077 wpa_s->scan_interval = 5;
2078 wpa_s->new_connection = 1;
2079 wpa_s->parent = wpa_s;
2080
2081 return wpa_s;
2082 }
2083
2084
wpa_supplicant_init_iface(struct wpa_supplicant * wpa_s,struct wpa_interface * iface)2085 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2086 struct wpa_interface *iface)
2087 {
2088 const char *ifname, *driver;
2089 struct wpa_driver_capa capa;
2090
2091 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2092 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2093 iface->confname ? iface->confname : "N/A",
2094 iface->driver ? iface->driver : "default",
2095 iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2096 iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2097
2098 if (iface->confname) {
2099 #ifdef CONFIG_BACKEND_FILE
2100 wpa_s->confname = os_rel2abs_path(iface->confname);
2101 if (wpa_s->confname == NULL) {
2102 wpa_printf(MSG_ERROR, "Failed to get absolute path "
2103 "for configuration file '%s'.",
2104 iface->confname);
2105 return -1;
2106 }
2107 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2108 iface->confname, wpa_s->confname);
2109 #else /* CONFIG_BACKEND_FILE */
2110 wpa_s->confname = os_strdup(iface->confname);
2111 #endif /* CONFIG_BACKEND_FILE */
2112 wpa_s->conf = wpa_config_read(wpa_s->confname);
2113 if (wpa_s->conf == NULL) {
2114 wpa_printf(MSG_ERROR, "Failed to read or parse "
2115 "configuration '%s'.", wpa_s->confname);
2116 return -1;
2117 }
2118
2119 /*
2120 * Override ctrl_interface and driver_param if set on command
2121 * line.
2122 */
2123 if (iface->ctrl_interface) {
2124 os_free(wpa_s->conf->ctrl_interface);
2125 wpa_s->conf->ctrl_interface =
2126 os_strdup(iface->ctrl_interface);
2127 }
2128
2129 if (iface->driver_param) {
2130 os_free(wpa_s->conf->driver_param);
2131 wpa_s->conf->driver_param =
2132 os_strdup(iface->driver_param);
2133 }
2134 } else
2135 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2136 iface->driver_param);
2137
2138 if (wpa_s->conf == NULL) {
2139 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2140 return -1;
2141 }
2142
2143 if (iface->ifname == NULL) {
2144 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2145 return -1;
2146 }
2147 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2148 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2149 iface->ifname);
2150 return -1;
2151 }
2152 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2153
2154 if (iface->bridge_ifname) {
2155 if (os_strlen(iface->bridge_ifname) >=
2156 sizeof(wpa_s->bridge_ifname)) {
2157 wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2158 "name '%s'.", iface->bridge_ifname);
2159 return -1;
2160 }
2161 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2162 sizeof(wpa_s->bridge_ifname));
2163 }
2164
2165 /* RSNA Supplicant Key Management - INITIALIZE */
2166 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2167 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2168
2169 /* Initialize driver interface and register driver event handler before
2170 * L2 receive handler so that association events are processed before
2171 * EAPOL-Key packets if both become available for the same select()
2172 * call. */
2173 driver = iface->driver;
2174 next_driver:
2175 if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2176 return -1;
2177
2178 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2179 if (wpa_s->drv_priv == NULL) {
2180 const char *pos;
2181 pos = driver ? os_strchr(driver, ',') : NULL;
2182 if (pos) {
2183 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2184 "driver interface - try next driver wrapper");
2185 driver = pos + 1;
2186 goto next_driver;
2187 }
2188 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2189 "interface");
2190 return -1;
2191 }
2192 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2193 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2194 "driver_param '%s'", wpa_s->conf->driver_param);
2195 return -1;
2196 }
2197
2198 ifname = wpa_drv_get_ifname(wpa_s);
2199 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2200 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2201 "interface name with '%s'", ifname);
2202 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2203 }
2204
2205 if (wpa_supplicant_init_wpa(wpa_s) < 0)
2206 return -1;
2207
2208 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2209 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2210 NULL);
2211 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2212
2213 if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2214 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2215 wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2216 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2217 "dot11RSNAConfigPMKLifetime");
2218 return -1;
2219 }
2220
2221 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2222 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2223 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2224 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2225 "dot11RSNAConfigPMKReauthThreshold");
2226 return -1;
2227 }
2228
2229 if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2230 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2231 wpa_s->conf->dot11RSNAConfigSATimeout)) {
2232 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2233 "dot11RSNAConfigSATimeout");
2234 return -1;
2235 }
2236
2237 if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2238 wpa_s->drv_flags = capa.flags;
2239 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2240 if (ieee80211_sta_init(wpa_s))
2241 return -1;
2242 }
2243 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2244 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2245 wpa_s->max_stations = capa.max_stations;
2246 }
2247 if (wpa_s->max_remain_on_chan == 0)
2248 wpa_s->max_remain_on_chan = 1000;
2249
2250 if (wpa_supplicant_driver_init(wpa_s) < 0)
2251 return -1;
2252
2253 #ifdef CONFIG_TDLS
2254 if (wpa_tdls_init(wpa_s->wpa))
2255 return -1;
2256 #endif /* CONFIG_TDLS */
2257
2258 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2259 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2260 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2261 return -1;
2262 }
2263
2264 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2265
2266 if (wpas_wps_init(wpa_s))
2267 return -1;
2268
2269 if (wpa_supplicant_init_eapol(wpa_s) < 0)
2270 return -1;
2271 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2272
2273 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2274 if (wpa_s->ctrl_iface == NULL) {
2275 wpa_printf(MSG_ERROR,
2276 "Failed to initialize control interface '%s'.\n"
2277 "You may have another wpa_supplicant process "
2278 "already running or the file was\n"
2279 "left by an unclean termination of wpa_supplicant "
2280 "in which case you will need\n"
2281 "to manually remove this file before starting "
2282 "wpa_supplicant again.\n",
2283 wpa_s->conf->ctrl_interface);
2284 return -1;
2285 }
2286
2287 #ifdef CONFIG_P2P
2288 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2289 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2290 return -1;
2291 }
2292 #endif /* CONFIG_P2P */
2293
2294 if (wpa_bss_init(wpa_s) < 0)
2295 return -1;
2296
2297 return 0;
2298 }
2299
2300
wpa_supplicant_deinit_iface(struct wpa_supplicant * wpa_s,int notify,int terminate)2301 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2302 int notify, int terminate)
2303 {
2304 if (wpa_s->drv_priv) {
2305 wpa_supplicant_deauthenticate(wpa_s,
2306 WLAN_REASON_DEAUTH_LEAVING);
2307
2308 wpa_drv_set_countermeasures(wpa_s, 0);
2309 wpa_clear_keys(wpa_s, NULL);
2310 }
2311
2312 wpa_supplicant_cleanup(wpa_s);
2313
2314 if (wpa_s->drv_priv)
2315 wpa_drv_deinit(wpa_s);
2316
2317 if (notify)
2318 wpas_notify_iface_removed(wpa_s);
2319
2320 /**
2321 * The wpa_drv_deinit call after sending TERMINATING to the framework causes
2322 * race condition with the start of hostapd.
2323 * This has been moved out of wpa_supplicant_cleanup(). Send the control
2324 * message and free config after the deinit.
2325 */
2326 if (terminate)
2327 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING);
2328
2329 if (wpa_s->ctrl_iface) {
2330 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
2331 wpa_s->ctrl_iface = NULL;
2332 }
2333
2334 if (wpa_s->conf != NULL) {
2335 wpa_config_free(wpa_s->conf);
2336 wpa_s->conf = NULL;
2337 }
2338 }
2339
2340
2341 /**
2342 * wpa_supplicant_add_iface - Add a new network interface
2343 * @global: Pointer to global data from wpa_supplicant_init()
2344 * @iface: Interface configuration options
2345 * Returns: Pointer to the created interface or %NULL on failure
2346 *
2347 * This function is used to add new network interfaces for %wpa_supplicant.
2348 * This can be called before wpa_supplicant_run() to add interfaces before the
2349 * main event loop has been started. In addition, new interfaces can be added
2350 * dynamically while %wpa_supplicant is already running. This could happen,
2351 * e.g., when a hotplug network adapter is inserted.
2352 */
wpa_supplicant_add_iface(struct wpa_global * global,struct wpa_interface * iface)2353 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2354 struct wpa_interface *iface)
2355 {
2356 struct wpa_supplicant *wpa_s;
2357 struct wpa_interface t_iface;
2358 struct wpa_ssid *ssid;
2359
2360 if (global == NULL || iface == NULL)
2361 return NULL;
2362
2363 wpa_s = wpa_supplicant_alloc();
2364 if (wpa_s == NULL)
2365 return NULL;
2366
2367 wpa_s->global = global;
2368
2369 t_iface = *iface;
2370 if (global->params.override_driver) {
2371 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2372 "('%s' -> '%s')",
2373 iface->driver, global->params.override_driver);
2374 t_iface.driver = global->params.override_driver;
2375 }
2376 if (global->params.override_ctrl_interface) {
2377 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2378 "ctrl_interface ('%s' -> '%s')",
2379 iface->ctrl_interface,
2380 global->params.override_ctrl_interface);
2381 t_iface.ctrl_interface =
2382 global->params.override_ctrl_interface;
2383 }
2384 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2385 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2386 iface->ifname);
2387 wpa_supplicant_deinit_iface(wpa_s, 0, 0);
2388 os_free(wpa_s);
2389 return NULL;
2390 }
2391
2392 /* Notify the control interfaces about new iface */
2393 if (wpas_notify_iface_added(wpa_s)) {
2394 wpa_supplicant_deinit_iface(wpa_s, 1, 0);
2395 os_free(wpa_s);
2396 return NULL;
2397 }
2398
2399 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2400 wpas_notify_network_added(wpa_s, ssid);
2401
2402 wpa_s->next = global->ifaces;
2403 global->ifaces = wpa_s;
2404
2405 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2406
2407 return wpa_s;
2408 }
2409
2410
2411 /**
2412 * wpa_supplicant_remove_iface - Remove a network interface
2413 * @global: Pointer to global data from wpa_supplicant_init()
2414 * @wpa_s: Pointer to the network interface to be removed
2415 * Returns: 0 if interface was removed, -1 if interface was not found
2416 *
2417 * This function can be used to dynamically remove network interfaces from
2418 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2419 * addition, this function is used to remove all remaining interfaces when
2420 * %wpa_supplicant is terminated.
2421 */
wpa_supplicant_remove_iface(struct wpa_global * global,struct wpa_supplicant * wpa_s,int terminate)2422 int wpa_supplicant_remove_iface(struct wpa_global *global,
2423 struct wpa_supplicant *wpa_s,
2424 int terminate)
2425 {
2426 struct wpa_supplicant *prev;
2427
2428 /* Remove interface from the global list of interfaces */
2429 prev = global->ifaces;
2430 if (prev == wpa_s) {
2431 global->ifaces = wpa_s->next;
2432 } else {
2433 while (prev && prev->next != wpa_s)
2434 prev = prev->next;
2435 if (prev == NULL)
2436 return -1;
2437 prev->next = wpa_s->next;
2438 }
2439
2440 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2441
2442 if (global->p2p_group_formation == wpa_s)
2443 global->p2p_group_formation = NULL;
2444 wpa_supplicant_deinit_iface(wpa_s, 1, terminate);
2445 os_free(wpa_s);
2446
2447 return 0;
2448 }
2449
2450
2451 /**
2452 * wpa_supplicant_get_eap_mode - Get the current EAP mode
2453 * @wpa_s: Pointer to the network interface
2454 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2455 */
wpa_supplicant_get_eap_mode(struct wpa_supplicant * wpa_s)2456 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2457 {
2458 const char *eapol_method;
2459
2460 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2461 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2462 return "NO-EAP";
2463 }
2464
2465 eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2466 if (eapol_method == NULL)
2467 return "UNKNOWN-EAP";
2468
2469 return eapol_method;
2470 }
2471
2472
2473 /**
2474 * wpa_supplicant_get_iface - Get a new network interface
2475 * @global: Pointer to global data from wpa_supplicant_init()
2476 * @ifname: Interface name
2477 * Returns: Pointer to the interface or %NULL if not found
2478 */
wpa_supplicant_get_iface(struct wpa_global * global,const char * ifname)2479 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2480 const char *ifname)
2481 {
2482 struct wpa_supplicant *wpa_s;
2483
2484 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2485 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2486 return wpa_s;
2487 }
2488 return NULL;
2489 }
2490
2491
2492 #ifndef CONFIG_NO_WPA_MSG
wpa_supplicant_msg_ifname_cb(void * ctx)2493 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2494 {
2495 struct wpa_supplicant *wpa_s = ctx;
2496 if (wpa_s == NULL)
2497 return NULL;
2498 return wpa_s->ifname;
2499 }
2500 #endif /* CONFIG_NO_WPA_MSG */
2501
2502
2503 /**
2504 * wpa_supplicant_init - Initialize %wpa_supplicant
2505 * @params: Parameters for %wpa_supplicant
2506 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2507 *
2508 * This function is used to initialize %wpa_supplicant. After successful
2509 * initialization, the returned data pointer can be used to add and remove
2510 * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2511 */
wpa_supplicant_init(struct wpa_params * params)2512 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2513 {
2514 struct wpa_global *global;
2515 int ret, i;
2516
2517 if (params == NULL)
2518 return NULL;
2519
2520 #ifndef CONFIG_NO_WPA_MSG
2521 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2522 #endif /* CONFIG_NO_WPA_MSG */
2523
2524 wpa_debug_open_file(params->wpa_debug_file_path);
2525 if (params->wpa_debug_syslog)
2526 wpa_debug_open_syslog();
2527
2528 ret = eap_register_methods();
2529 if (ret) {
2530 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2531 if (ret == -2)
2532 wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2533 "the same EAP type.");
2534 return NULL;
2535 }
2536
2537 global = os_zalloc(sizeof(*global));
2538 if (global == NULL)
2539 return NULL;
2540 dl_list_init(&global->p2p_srv_bonjour);
2541 dl_list_init(&global->p2p_srv_upnp);
2542 global->params.daemonize = params->daemonize;
2543 global->params.wait_for_monitor = params->wait_for_monitor;
2544 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2545 if (params->pid_file)
2546 global->params.pid_file = os_strdup(params->pid_file);
2547 if (params->ctrl_interface)
2548 global->params.ctrl_interface =
2549 os_strdup(params->ctrl_interface);
2550 if (params->override_driver)
2551 global->params.override_driver =
2552 os_strdup(params->override_driver);
2553 if (params->override_ctrl_interface)
2554 global->params.override_ctrl_interface =
2555 os_strdup(params->override_ctrl_interface);
2556 wpa_debug_level = global->params.wpa_debug_level =
2557 params->wpa_debug_level;
2558 wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2559 params->wpa_debug_show_keys;
2560 wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2561 params->wpa_debug_timestamp;
2562
2563 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2564
2565 if (eloop_init()) {
2566 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2567 wpa_supplicant_deinit(global);
2568 return NULL;
2569 }
2570
2571 random_init(params->entropy_file);
2572
2573 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2574 if (global->ctrl_iface == NULL) {
2575 wpa_supplicant_deinit(global);
2576 return NULL;
2577 }
2578
2579 if (wpas_notify_supplicant_initialized(global)) {
2580 wpa_supplicant_deinit(global);
2581 return NULL;
2582 }
2583
2584 for (i = 0; wpa_drivers[i]; i++)
2585 global->drv_count++;
2586 if (global->drv_count == 0) {
2587 wpa_printf(MSG_ERROR, "No drivers enabled");
2588 wpa_supplicant_deinit(global);
2589 return NULL;
2590 }
2591 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2592 if (global->drv_priv == NULL) {
2593 wpa_supplicant_deinit(global);
2594 return NULL;
2595 }
2596 for (i = 0; wpa_drivers[i]; i++) {
2597 if (!wpa_drivers[i]->global_init)
2598 continue;
2599 global->drv_priv[i] = wpa_drivers[i]->global_init();
2600 if (global->drv_priv[i] == NULL) {
2601 wpa_printf(MSG_ERROR, "Failed to initialize driver "
2602 "'%s'", wpa_drivers[i]->name);
2603 wpa_supplicant_deinit(global);
2604 return NULL;
2605 }
2606 }
2607
2608 return global;
2609 }
2610
2611
2612 /**
2613 * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2614 * @global: Pointer to global data from wpa_supplicant_init()
2615 * Returns: 0 after successful event loop run, -1 on failure
2616 *
2617 * This function starts the main event loop and continues running as long as
2618 * there are any remaining events. In most cases, this function is running as
2619 * long as the %wpa_supplicant process in still in use.
2620 */
wpa_supplicant_run(struct wpa_global * global)2621 int wpa_supplicant_run(struct wpa_global *global)
2622 {
2623 struct wpa_supplicant *wpa_s;
2624
2625 if (global->params.daemonize &&
2626 wpa_supplicant_daemon(global->params.pid_file))
2627 return -1;
2628
2629 if (global->params.wait_for_monitor) {
2630 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2631 if (wpa_s->ctrl_iface)
2632 wpa_supplicant_ctrl_iface_wait(
2633 wpa_s->ctrl_iface);
2634 }
2635
2636 eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2637 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2638
2639 eloop_run();
2640
2641 return 0;
2642 }
2643
2644
2645 /**
2646 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2647 * @global: Pointer to global data from wpa_supplicant_init()
2648 *
2649 * This function is called to deinitialize %wpa_supplicant and to free all
2650 * allocated resources. Remaining network interfaces will also be removed.
2651 */
wpa_supplicant_deinit(struct wpa_global * global)2652 void wpa_supplicant_deinit(struct wpa_global *global)
2653 {
2654 int i;
2655
2656 if (global == NULL)
2657 return;
2658 #ifdef CONFIG_P2P
2659 wpas_p2p_deinit_global(global);
2660 #endif /* CONFIG_P2P */
2661
2662 while (global->ifaces)
2663 wpa_supplicant_remove_iface(global, global->ifaces, 1);
2664
2665 if (global->ctrl_iface)
2666 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2667
2668 wpas_notify_supplicant_deinitialized(global);
2669
2670 eap_peer_unregister_methods();
2671 #ifdef CONFIG_AP
2672 eap_server_unregister_methods();
2673 #endif /* CONFIG_AP */
2674
2675 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2676 if (!global->drv_priv[i])
2677 continue;
2678 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2679 }
2680 os_free(global->drv_priv);
2681
2682 random_deinit();
2683
2684 eloop_destroy();
2685
2686 if (global->params.pid_file) {
2687 os_daemonize_terminate(global->params.pid_file);
2688 os_free(global->params.pid_file);
2689 }
2690 os_free(global->params.ctrl_interface);
2691 os_free(global->params.override_driver);
2692 os_free(global->params.override_ctrl_interface);
2693
2694 os_free(global);
2695 wpa_debug_close_syslog();
2696 wpa_debug_close_file();
2697 }
2698
2699
wpa_supplicant_update_config(struct wpa_supplicant * wpa_s)2700 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2701 {
2702 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
2703 wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
2704 char country[3];
2705 country[0] = wpa_s->conf->country[0];
2706 country[1] = wpa_s->conf->country[1];
2707 country[2] = '\0';
2708 if (wpa_drv_set_country(wpa_s, country) < 0) {
2709 wpa_printf(MSG_ERROR, "Failed to set country code "
2710 "'%s'", country);
2711 }
2712 }
2713
2714 #ifdef CONFIG_WPS
2715 wpas_wps_update_config(wpa_s);
2716 #endif /* CONFIG_WPS */
2717
2718 #ifdef CONFIG_P2P
2719 wpas_p2p_update_config(wpa_s);
2720 #endif /* CONFIG_P2P */
2721
2722 wpa_s->conf->changed_parameters = 0;
2723 }
2724
2725
ieee80211_sta_free_hw_features(struct hostapd_hw_modes * hw_features,size_t num_hw_features)2726 void ieee80211_sta_free_hw_features(struct hostapd_hw_modes *hw_features,
2727 size_t num_hw_features)
2728 {
2729 size_t i;
2730
2731 if (hw_features == NULL)
2732 return;
2733
2734 for (i = 0; i < num_hw_features; i++) {
2735 os_free(hw_features[i].channels);
2736 os_free(hw_features[i].rates);
2737 }
2738
2739 os_free(hw_features);
2740 }
2741
2742
add_freq(int * freqs,int * num_freqs,int freq)2743 static void add_freq(int *freqs, int *num_freqs, int freq)
2744 {
2745 int i;
2746
2747 for (i = 0; i < *num_freqs; i++) {
2748 if (freqs[i] == freq)
2749 return;
2750 }
2751
2752 freqs[*num_freqs] = freq;
2753 (*num_freqs)++;
2754 }
2755
2756
get_bss_freqs_in_ess(struct wpa_supplicant * wpa_s)2757 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
2758 {
2759 struct wpa_bss *bss, *cbss;
2760 const int max_freqs = 10;
2761 int *freqs;
2762 int num_freqs = 0;
2763
2764 freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
2765 if (freqs == NULL)
2766 return NULL;
2767
2768 cbss = wpa_s->current_bss;
2769
2770 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2771 if (bss == cbss)
2772 continue;
2773 if (bss->ssid_len == cbss->ssid_len &&
2774 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
2775 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
2776 add_freq(freqs, &num_freqs, bss->freq);
2777 if (num_freqs == max_freqs)
2778 break;
2779 }
2780 }
2781
2782 if (num_freqs == 0) {
2783 os_free(freqs);
2784 freqs = NULL;
2785 }
2786
2787 return freqs;
2788 }
2789
2790
wpas_connection_failed(struct wpa_supplicant * wpa_s,const u8 * bssid)2791 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
2792 {
2793 int timeout;
2794 int count;
2795 int *freqs = NULL;
2796
2797 /*
2798 * Add the failed BSSID into the blacklist and speed up next scan
2799 * attempt if there could be other APs that could accept association.
2800 * The current blacklist count indicates how many times we have tried
2801 * connecting to this AP and multiple attempts mean that other APs are
2802 * either not available or has already been tried, so that we can start
2803 * increasing the delay here to avoid constant scanning.
2804 */
2805 count = wpa_blacklist_add(wpa_s, bssid);
2806 if (count == 1 && wpa_s->current_bss) {
2807 /*
2808 * This BSS was not in the blacklist before. If there is
2809 * another BSS available for the same ESS, we should try that
2810 * next. Otherwise, we may as well try this one once more
2811 * before allowing other, likely worse, ESSes to be considered.
2812 */
2813 freqs = get_bss_freqs_in_ess(wpa_s);
2814 if (freqs) {
2815 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
2816 "has been seen; try it next");
2817 wpa_blacklist_add(wpa_s, bssid);
2818 /*
2819 * On the next scan, go through only the known channels
2820 * used in this ESS based on previous scans to speed up
2821 * common load balancing use case.
2822 */
2823 os_free(wpa_s->next_scan_freqs);
2824 wpa_s->next_scan_freqs = freqs;
2825 }
2826 }
2827
2828 switch (count) {
2829 case 1:
2830 timeout = 100;
2831 break;
2832 case 2:
2833 timeout = 500;
2834 break;
2835 case 3:
2836 timeout = 1000;
2837 break;
2838 default:
2839 timeout = 5000;
2840 }
2841
2842 /*
2843 * TODO: if more than one possible AP is available in scan results,
2844 * could try the other ones before requesting a new scan.
2845 */
2846 wpa_supplicant_req_scan(wpa_s, timeout / 1000,
2847 1000 * (timeout % 1000));
2848 }
2849