1 /*
2 * WPA Supplicant
3 * Copyright (c) 2003-2010, 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 */
19 #include "includes.h"
21 #include "common.h"
22 #include "eapol_supp/eapol_supp_sm.h"
23 #include "eap_peer/eap.h"
24 #include "eap_server/eap_methods.h"
25 #include "rsn_supp/wpa.h"
26 #include "eloop.h"
27 #include "config.h"
28 #include "l2_packet/l2_packet.h"
29 #include "wpa_supplicant_i.h"
30 #include "driver_i.h"
31 #include "ctrl_iface.h"
32 #include "pcsc_funcs.h"
33 #include "common/version.h"
34 #include "rsn_supp/preauth.h"
35 #include "rsn_supp/pmksa_cache.h"
36 #include "common/wpa_ctrl.h"
37 #include "mlme.h"
38 #include "common/ieee802_11_defs.h"
39 #include "blacklist.h"
40 #include "wpas_glue.h"
41 #include "wps_supplicant.h"
42 #include "ibss_rsn.h"
43 #include "sme.h"
44 #include "ap.h"
45 #include "notify.h"
46 #include "bgscan.h"
47 #include "bss.h"
48 #include "scan.h"
50 const char *wpa_supplicant_version =
51 "wpa_supplicant v" VERSION_STR "\n"
52 "Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi> and contributors";
54 const char *wpa_supplicant_license =
55 "This program is free software. You can distribute it and/or modify it\n"
56 "under the terms of the GNU General Public License version 2.\n"
57 "\n"
58 "Alternatively, this software may be distributed under the terms of the\n"
59 "BSD license. See README and COPYING for more details.\n"
60 #ifdef EAP_TLS_OPENSSL
61 "\nThis product includes software developed by the OpenSSL Project\n"
62 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
63 #endif /* EAP_TLS_OPENSSL */
64 ;
66 #ifndef CONFIG_NO_STDOUT_DEBUG
67 /* Long text divided into parts in order to fit in C89 strings size limits. */
68 const char *wpa_supplicant_full_license1 =
69 "This program is free software; you can redistribute it and/or modify\n"
70 "it under the terms of the GNU General Public License version 2 as\n"
71 "published by the Free Software Foundation.\n"
72 "\n"
73 "This program is distributed in the hope that it will be useful,\n"
74 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
75 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
76 "GNU General Public License for more details.\n"
77 "\n";
78 const char *wpa_supplicant_full_license2 =
79 "You should have received a copy of the GNU General Public License\n"
80 "along with this program; if not, write to the Free Software\n"
81 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n"
82 "\n"
83 "Alternatively, this software may be distributed under the terms of the\n"
84 "BSD license.\n"
85 "\n"
86 "Redistribution and use in source and binary forms, with or without\n"
87 "modification, are permitted provided that the following conditions are\n"
88 "met:\n"
89 "\n";
90 const char *wpa_supplicant_full_license3 =
91 "1. Redistributions of source code must retain the above copyright\n"
92 " notice, this list of conditions and the following disclaimer.\n"
93 "\n"
94 "2. Redistributions in binary form must reproduce the above copyright\n"
95 " notice, this list of conditions and the following disclaimer in the\n"
96 " documentation and/or other materials provided with the distribution.\n"
97 "\n";
98 const char *wpa_supplicant_full_license4 =
99 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
100 " names of its contributors may be used to endorse or promote products\n"
101 " derived from this software without specific prior written permission.\n"
102 "\n"
103 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
104 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
105 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
106 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
107 const char *wpa_supplicant_full_license5 =
108 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
109 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
110 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
111 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
112 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
113 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
114 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
115 "\n";
116 #endif /* CONFIG_NO_STDOUT_DEBUG */
118 extern int wpa_debug_level;
119 extern int wpa_debug_show_keys;
120 extern int wpa_debug_timestamp;
121 extern struct wpa_driver_ops *wpa_drivers[];
123 /* Configure default/group WEP keys for static WEP */
124 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
125 {
126 int i, set = 0;
128 for (i = 0; i < NUM_WEP_KEYS; i++) {
129 if (ssid->wep_key_len[i] == 0)
130 continue;
132 set = 1;
133 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
134 (u8 *) "\xff\xff\xff\xff\xff\xff",
135 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
136 ssid->wep_key[i], ssid->wep_key_len[i]);
137 }
139 return set;
140 }
143 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
144 struct wpa_ssid *ssid)
145 {
146 u8 key[32];
147 size_t keylen;
148 enum wpa_alg alg;
149 u8 seq[6] = { 0 };
151 /* IBSS/WPA-None uses only one key (Group) for both receiving and
152 * sending unicast and multicast packets. */
154 if (ssid->mode != WPAS_MODE_IBSS) {
155 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
156 "for WPA-None", ssid->mode);
157 return -1;
158 }
160 if (!ssid->psk_set) {
161 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
162 return -1;
163 }
165 switch (wpa_s->group_cipher) {
166 case WPA_CIPHER_CCMP:
167 os_memcpy(key, ssid->psk, 16);
168 keylen = 16;
169 alg = WPA_ALG_CCMP;
170 break;
171 case WPA_CIPHER_TKIP:
172 /* WPA-None uses the same Michael MIC key for both TX and RX */
173 os_memcpy(key, ssid->psk, 16 + 8);
174 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
175 keylen = 32;
176 alg = WPA_ALG_TKIP;
177 break;
178 default:
179 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
180 "WPA-None", wpa_s->group_cipher);
181 return -1;
182 }
184 /* TODO: should actually remember the previously used seq#, both for TX
185 * and RX from each STA.. */
187 return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
188 0, 1, seq, 6, key, keylen);
189 }
192 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
193 {
194 struct wpa_supplicant *wpa_s = eloop_ctx;
195 const u8 *bssid = wpa_s->bssid;
196 if (is_zero_ether_addr(bssid))
197 bssid = wpa_s->pending_bssid;
198 wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
199 MAC2STR(bssid));
200 wpa_blacklist_add(wpa_s, bssid);
201 wpa_sm_notify_disassoc(wpa_s->wpa);
202 wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
203 wpa_s->reassociate = 1;
204 wpa_supplicant_req_scan(wpa_s, 0, 0);
205 }
208 /**
209 * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
210 * @wpa_s: Pointer to wpa_supplicant data
211 * @sec: Number of seconds after which to time out authentication
212 * @usec: Number of microseconds after which to time out authentication
213 *
214 * This function is used to schedule a timeout for the current authentication
215 * attempt.
216 */
217 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
218 int sec, int usec)
219 {
220 if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
221 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
222 return;
224 wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
225 "%d usec", sec, usec);
226 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
227 eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
228 }
231 /**
232 * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
233 * @wpa_s: Pointer to wpa_supplicant data
234 *
235 * This function is used to cancel authentication timeout scheduled with
236 * wpa_supplicant_req_auth_timeout() and it is called when authentication has
237 * been completed.
238 */
239 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
240 {
241 wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
242 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
243 wpa_blacklist_del(wpa_s, wpa_s->bssid);
244 }
247 /**
248 * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
249 * @wpa_s: Pointer to wpa_supplicant data
250 *
251 * This function is used to configure EAPOL state machine based on the selected
252 * authentication mode.
253 */
254 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
255 {
256 #ifdef IEEE8021X_EAPOL
257 struct eapol_config eapol_conf;
258 struct wpa_ssid *ssid = wpa_s->current_ssid;
260 #ifdef CONFIG_IBSS_RSN
261 if (ssid->mode == WPAS_MODE_IBSS &&
262 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
263 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
264 /*
265 * RSN IBSS authentication is per-STA and we can disable the
266 * per-BSSID EAPOL authentication.
267 */
268 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
269 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
270 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
271 return;
272 }
273 #endif /* CONFIG_IBSS_RSN */
275 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
276 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
278 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
279 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
280 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
281 else
282 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
284 os_memset(&eapol_conf, 0, sizeof(eapol_conf));
285 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
286 eapol_conf.accept_802_1x_keys = 1;
287 eapol_conf.required_keys = 0;
288 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
289 eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
290 }
291 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
292 eapol_conf.required_keys |=
293 EAPOL_REQUIRE_KEY_BROADCAST;
294 }
296 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
297 eapol_conf.required_keys = 0;
298 }
299 if (wpa_s->conf)
300 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
301 eapol_conf.workaround = ssid->eap_workaround;
302 eapol_conf.eap_disabled =
303 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
304 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
305 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
306 eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
307 #endif /* IEEE8021X_EAPOL */
308 }
311 /**
312 * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
313 * @wpa_s: Pointer to wpa_supplicant data
314 * @ssid: Configuration data for the network
315 *
316 * This function is used to configure WPA state machine and related parameters
317 * to a mode where WPA is not enabled. This is called as part of the
318 * authentication configuration when the selected network does not use WPA.
319 */
320 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
321 struct wpa_ssid *ssid)
322 {
323 int i;
325 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
326 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
327 else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
328 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
329 else
330 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
331 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
332 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
333 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
334 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
335 wpa_s->group_cipher = WPA_CIPHER_NONE;
336 wpa_s->mgmt_group_cipher = 0;
338 for (i = 0; i < NUM_WEP_KEYS; i++) {
339 if (ssid->wep_key_len[i] > 5) {
340 wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
341 wpa_s->group_cipher = WPA_CIPHER_WEP104;
342 break;
343 } else if (ssid->wep_key_len[i] > 0) {
344 wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
345 wpa_s->group_cipher = WPA_CIPHER_WEP40;
346 break;
347 }
348 }
350 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
351 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
352 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
353 wpa_s->pairwise_cipher);
354 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
355 #ifdef CONFIG_IEEE80211W
356 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
357 wpa_s->mgmt_group_cipher);
358 #endif /* CONFIG_IEEE80211W */
360 pmksa_cache_clear_current(wpa_s->wpa);
361 }
364 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
365 {
366 bgscan_deinit(wpa_s);
367 scard_deinit(wpa_s->scard);
368 wpa_s->scard = NULL;
369 wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
370 eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
371 l2_packet_deinit(wpa_s->l2);
372 wpa_s->l2 = NULL;
373 if (wpa_s->l2_br) {
374 l2_packet_deinit(wpa_s->l2_br);
375 wpa_s->l2_br = NULL;
376 }
378 if (wpa_s->ctrl_iface) {
379 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
380 wpa_s->ctrl_iface = NULL;
381 }
382 if (wpa_s->conf != NULL) {
383 struct wpa_ssid *ssid;
384 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
385 wpas_notify_network_removed(wpa_s, ssid);
386 wpa_config_free(wpa_s->conf);
387 wpa_s->conf = NULL;
388 }
390 os_free(wpa_s->confname);
391 wpa_s->confname = NULL;
393 wpa_sm_set_eapol(wpa_s->wpa, NULL);
394 eapol_sm_deinit(wpa_s->eapol);
395 wpa_s->eapol = NULL;
397 rsn_preauth_deinit(wpa_s->wpa);
399 pmksa_candidate_free(wpa_s->wpa);
400 wpa_sm_deinit(wpa_s->wpa);
401 wpa_s->wpa = NULL;
402 wpa_blacklist_clear(wpa_s);
404 wpa_bss_deinit(wpa_s);
406 wpa_supplicant_cancel_scan(wpa_s);
407 wpa_supplicant_cancel_auth_timeout(wpa_s);
409 ieee80211_sta_deinit(wpa_s);
411 wpas_wps_deinit(wpa_s);
413 wpabuf_free(wpa_s->pending_eapol_rx);
414 wpa_s->pending_eapol_rx = NULL;
416 #ifdef CONFIG_IBSS_RSN
417 ibss_rsn_deinit(wpa_s->ibss_rsn);
418 wpa_s->ibss_rsn = NULL;
419 #endif /* CONFIG_IBSS_RSN */
421 #ifdef CONFIG_SME
422 os_free(wpa_s->sme.ft_ies);
423 wpa_s->sme.ft_ies = NULL;
424 wpa_s->sme.ft_ies_len = 0;
425 #endif /* CONFIG_SME */
427 #ifdef CONFIG_AP
428 wpa_supplicant_ap_deinit(wpa_s);
429 #endif /* CONFIG_AP */
430 }
433 /**
434 * wpa_clear_keys - Clear keys configured for the driver
435 * @wpa_s: Pointer to wpa_supplicant data
436 * @addr: Previously used BSSID or %NULL if not available
437 *
438 * This function clears the encryption keys that has been previously configured
439 * for the driver.
440 */
441 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
442 {
443 u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
445 if (wpa_s->keys_cleared) {
446 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
447 * timing issues with keys being cleared just before new keys
448 * are set or just after association or something similar. This
449 * shows up in group key handshake failing often because of the
450 * client not receiving the first encrypted packets correctly.
451 * Skipping some of the extra key clearing steps seems to help
452 * in completing group key handshake more reliably. */
453 wpa_printf(MSG_DEBUG, "No keys have been configured - "
454 "skip key clearing");
455 return;
456 }
458 /* MLME-DELETEKEYS.request */
459 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
460 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
461 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
462 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
463 #ifdef CONFIG_IEEE80211W
464 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 4, 0, NULL, 0, NULL, 0);
465 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 5, 0, NULL, 0, NULL, 0);
466 #endif /* CONFIG_IEEE80211W */
467 if (addr) {
468 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
469 0);
470 /* MLME-SETPROTECTION.request(None) */
471 wpa_drv_mlme_setprotection(
472 wpa_s, addr,
473 MLME_SETPROTECTION_PROTECT_TYPE_NONE,
474 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
475 }
476 wpa_s->keys_cleared = 1;
477 }
480 /**
481 * wpa_supplicant_state_txt - Get the connection state name as a text string
482 * @state: State (wpa_state; WPA_*)
483 * Returns: The state name as a printable text string
484 */
485 const char * wpa_supplicant_state_txt(enum wpa_states state)
486 {
487 switch (state) {
488 case WPA_DISCONNECTED:
489 return "DISCONNECTED";
490 case WPA_INACTIVE:
491 return "INACTIVE";
492 case WPA_SCANNING:
493 return "SCANNING";
494 case WPA_AUTHENTICATING:
495 return "AUTHENTICATING";
496 case WPA_ASSOCIATING:
497 return "ASSOCIATING";
498 case WPA_ASSOCIATED:
499 return "ASSOCIATED";
500 case WPA_4WAY_HANDSHAKE:
501 return "4WAY_HANDSHAKE";
502 case WPA_GROUP_HANDSHAKE:
503 return "GROUP_HANDSHAKE";
504 case WPA_COMPLETED:
505 return "COMPLETED";
506 default:
507 return "UNKNOWN";
508 }
509 }
512 /**
513 * wpa_supplicant_set_state - Set current connection state
514 * @wpa_s: Pointer to wpa_supplicant data
515 * @state: The new connection state
516 *
517 * This function is called whenever the connection state changes, e.g.,
518 * association is completed for WPA/WPA2 4-Way Handshake is started.
519 */
520 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
521 enum wpa_states state)
522 {
523 enum wpa_states old_state = wpa_s->wpa_state;
525 wpa_printf(MSG_DEBUG, "State: %s -> %s",
526 wpa_supplicant_state_txt(wpa_s->wpa_state),
527 wpa_supplicant_state_txt(state));
529 if (state != WPA_SCANNING)
530 wpa_supplicant_notify_scanning(wpa_s, 0);
532 if (state == WPA_COMPLETED && wpa_s->new_connection) {
533 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
534 struct wpa_ssid *ssid = wpa_s->current_ssid;
535 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
536 MACSTR " completed %s [id=%d id_str=%s]",
537 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
538 "(reauth)" : "(auth)",
539 ssid ? ssid->id : -1,
540 ssid && ssid->id_str ? ssid->id_str : "");
541 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
542 wpa_s->new_connection = 0;
543 wpa_s->reassociated_connection = 1;
544 wpa_drv_set_operstate(wpa_s, 1);
545 wpa_s->after_wps = 0;
546 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
547 state == WPA_ASSOCIATED) {
548 wpa_s->new_connection = 1;
549 wpa_drv_set_operstate(wpa_s, 0);
550 }
551 wpa_s->wpa_state = state;
553 if (wpa_s->wpa_state != old_state)
554 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
555 }
558 void wpa_supplicant_terminate_proc(struct wpa_global *global)
559 {
560 int pending = 0;
561 #ifdef CONFIG_WPS
562 struct wpa_supplicant *wpa_s = global->ifaces;
563 while (wpa_s) {
564 if (wpas_wps_terminate_pending(wpa_s) == 1)
565 pending = 1;
566 wpa_s = wpa_s->next;
567 }
568 #endif /* CONFIG_WPS */
569 if (pending)
570 return;
571 eloop_terminate();
572 }
575 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
576 {
577 struct wpa_global *global = signal_ctx;
578 struct wpa_supplicant *wpa_s;
579 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
580 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
581 "received", sig);
582 }
583 wpa_supplicant_terminate_proc(global);
584 }
587 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
588 {
589 enum wpa_states old_state = wpa_s->wpa_state;
591 wpa_s->pairwise_cipher = 0;
592 wpa_s->group_cipher = 0;
593 wpa_s->mgmt_group_cipher = 0;
594 wpa_s->key_mgmt = 0;
595 wpa_s->wpa_state = WPA_DISCONNECTED;
597 if (wpa_s->wpa_state != old_state)
598 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
599 }
602 /**
603 * wpa_supplicant_reload_configuration - Reload configuration data
604 * @wpa_s: Pointer to wpa_supplicant data
605 * Returns: 0 on success or -1 if configuration parsing failed
606 *
607 * This function can be used to request that the configuration data is reloaded
608 * (e.g., after configuration file change). This function is reloading
609 * configuration only for one interface, so this may need to be called multiple
610 * times if %wpa_supplicant is controlling multiple interfaces and all
611 * interfaces need reconfiguration.
612 */
613 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
614 {
615 struct wpa_config *conf;
616 struct wpa_ssid *old_ssid;
617 int reconf_ctrl;
618 int old_ap_scan;
620 if (wpa_s->confname == NULL)
621 return -1;
622 conf = wpa_config_read(wpa_s->confname);
623 if (conf == NULL) {
624 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
625 "file '%s' - exiting", wpa_s->confname);
626 return -1;
627 }
629 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
630 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
631 os_strcmp(conf->ctrl_interface,
632 wpa_s->conf->ctrl_interface) != 0);
634 if (reconf_ctrl && wpa_s->ctrl_iface) {
635 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
636 wpa_s->ctrl_iface = NULL;
637 }
639 eapol_sm_invalidate_cached_session(wpa_s->eapol);
640 old_ssid = wpa_s->current_ssid;
641 wpa_s->current_ssid = NULL;
642 if (old_ssid != wpa_s->current_ssid)
643 wpas_notify_network_changed(wpa_s);
645 /*
646 * TODO: should notify EAPOL SM about changes in opensc_engine_path,
647 * pkcs11_engine_path, pkcs11_module_path.
648 */
649 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
650 /*
651 * Clear forced success to clear EAP state for next
652 * authentication.
653 */
654 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
655 }
656 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
657 wpa_sm_set_config(wpa_s->wpa, NULL);
658 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
659 rsn_preauth_deinit(wpa_s->wpa);
661 old_ap_scan = wpa_s->conf->ap_scan;
662 wpa_config_free(wpa_s->conf);
663 wpa_s->conf = conf;
664 if (old_ap_scan != wpa_s->conf->ap_scan)
665 wpas_notify_ap_scan_changed(wpa_s);
667 if (reconf_ctrl)
668 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
670 wpa_supplicant_clear_status(wpa_s);
671 wpa_s->reassociate = 1;
672 wpa_supplicant_req_scan(wpa_s, 0, 0);
673 wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
674 return 0;
675 }
678 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
679 {
680 struct wpa_global *global = signal_ctx;
681 struct wpa_supplicant *wpa_s;
682 wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
683 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
684 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
685 wpa_supplicant_terminate_proc(global);
686 }
687 }
688 }
691 static enum wpa_cipher cipher_suite2driver(int cipher)
692 {
693 switch (cipher) {
694 case WPA_CIPHER_NONE:
695 return CIPHER_NONE;
696 case WPA_CIPHER_WEP40:
697 return CIPHER_WEP40;
698 case WPA_CIPHER_WEP104:
699 return CIPHER_WEP104;
700 case WPA_CIPHER_CCMP:
701 return CIPHER_CCMP;
702 case WPA_CIPHER_TKIP:
703 default:
704 return CIPHER_TKIP;
705 }
706 }
709 static enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
710 {
711 switch (key_mgmt) {
712 case WPA_KEY_MGMT_NONE:
713 return KEY_MGMT_NONE;
714 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
715 return KEY_MGMT_802_1X_NO_WPA;
716 case WPA_KEY_MGMT_IEEE8021X:
717 return KEY_MGMT_802_1X;
718 case WPA_KEY_MGMT_WPA_NONE:
719 return KEY_MGMT_WPA_NONE;
720 case WPA_KEY_MGMT_FT_IEEE8021X:
721 return KEY_MGMT_FT_802_1X;
722 case WPA_KEY_MGMT_FT_PSK:
723 return KEY_MGMT_FT_PSK;
724 case WPA_KEY_MGMT_IEEE8021X_SHA256:
725 return KEY_MGMT_802_1X_SHA256;
726 case WPA_KEY_MGMT_PSK_SHA256:
727 return KEY_MGMT_PSK_SHA256;
728 case WPA_KEY_MGMT_WPS:
729 return KEY_MGMT_WPS;
730 case WPA_KEY_MGMT_PSK:
731 default:
732 return KEY_MGMT_PSK;
733 }
734 }
737 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
738 struct wpa_ssid *ssid,
739 struct wpa_ie_data *ie)
740 {
741 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
742 if (ret) {
743 if (ret == -2) {
744 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
745 "from association info");
746 }
747 return -1;
748 }
750 wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
751 "suites");
752 if (!(ie->group_cipher & ssid->group_cipher)) {
753 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
754 "cipher 0x%x (mask 0x%x) - reject",
755 ie->group_cipher, ssid->group_cipher);
756 return -1;
757 }
758 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
759 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
760 "cipher 0x%x (mask 0x%x) - reject",
761 ie->pairwise_cipher, ssid->pairwise_cipher);
762 return -1;
763 }
764 if (!(ie->key_mgmt & ssid->key_mgmt)) {
765 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
766 "management 0x%x (mask 0x%x) - reject",
767 ie->key_mgmt, ssid->key_mgmt);
768 return -1;
769 }
771 #ifdef CONFIG_IEEE80211W
772 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
773 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
774 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
775 "that does not support management frame protection - "
776 "reject");
777 return -1;
778 }
779 #endif /* CONFIG_IEEE80211W */
781 return 0;
782 }
785 /**
786 * wpa_supplicant_set_suites - Set authentication and encryption parameters
787 * @wpa_s: Pointer to wpa_supplicant data
788 * @bss: Scan results for the selected BSS, or %NULL if not available
789 * @ssid: Configuration data for the selected network
790 * @wpa_ie: Buffer for the WPA/RSN IE
791 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
792 * used buffer length in case the functions returns success.
793 * Returns: 0 on success or -1 on failure
794 *
795 * This function is used to configure authentication and encryption parameters
796 * based on the network configuration and scan result for the selected BSS (if
797 * available).
798 */
799 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
800 struct wpa_bss *bss, struct wpa_ssid *ssid,
801 u8 *wpa_ie, size_t *wpa_ie_len)
802 {
803 struct wpa_ie_data ie;
804 int sel, proto;
805 const u8 *bss_wpa, *bss_rsn;
807 if (bss) {
808 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
809 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
810 } else
811 bss_wpa = bss_rsn = NULL;
813 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
814 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
815 (ie.group_cipher & ssid->group_cipher) &&
816 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
817 (ie.key_mgmt & ssid->key_mgmt)) {
818 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
819 proto = WPA_PROTO_RSN;
820 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
821 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
822 (ie.group_cipher & ssid->group_cipher) &&
823 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
824 (ie.key_mgmt & ssid->key_mgmt)) {
825 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
826 proto = WPA_PROTO_WPA;
827 } else if (bss) {
828 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
829 return -1;
830 } else {
831 if (ssid->proto & WPA_PROTO_RSN)
832 proto = WPA_PROTO_RSN;
833 else
834 proto = WPA_PROTO_WPA;
835 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
836 os_memset(&ie, 0, sizeof(ie));
837 ie.group_cipher = ssid->group_cipher;
838 ie.pairwise_cipher = ssid->pairwise_cipher;
839 ie.key_mgmt = ssid->key_mgmt;
840 #ifdef CONFIG_IEEE80211W
841 ie.mgmt_group_cipher =
842 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
843 WPA_CIPHER_AES_128_CMAC : 0;
844 #endif /* CONFIG_IEEE80211W */
845 wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
846 "on configuration");
847 } else
848 proto = ie.proto;
849 }
851 wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
852 "pairwise %d key_mgmt %d proto %d",
853 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
854 #ifdef CONFIG_IEEE80211W
855 if (ssid->ieee80211w) {
856 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
857 ie.mgmt_group_cipher);
858 }
859 #endif /* CONFIG_IEEE80211W */
861 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
862 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
863 !!(ssid->proto & WPA_PROTO_RSN));
865 if (bss || !wpa_s->ap_ies_from_associnfo) {
866 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
867 bss_wpa ? 2 + bss_wpa[1] : 0) ||
868 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
869 bss_rsn ? 2 + bss_rsn[1] : 0))
870 return -1;
871 }
873 sel = ie.group_cipher & ssid->group_cipher;
874 if (sel & WPA_CIPHER_CCMP) {
875 wpa_s->group_cipher = WPA_CIPHER_CCMP;
876 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
877 } else if (sel & WPA_CIPHER_TKIP) {
878 wpa_s->group_cipher = WPA_CIPHER_TKIP;
879 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
880 } else if (sel & WPA_CIPHER_WEP104) {
881 wpa_s->group_cipher = WPA_CIPHER_WEP104;
882 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
883 } else if (sel & WPA_CIPHER_WEP40) {
884 wpa_s->group_cipher = WPA_CIPHER_WEP40;
885 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
886 } else {
887 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
888 return -1;
889 }
891 sel = ie.pairwise_cipher & ssid->pairwise_cipher;
892 if (sel & WPA_CIPHER_CCMP) {
893 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
894 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
895 } else if (sel & WPA_CIPHER_TKIP) {
896 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
897 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
898 } else if (sel & WPA_CIPHER_NONE) {
899 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
900 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
901 } else {
902 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
903 "cipher.");
904 return -1;
905 }
907 sel = ie.key_mgmt & ssid->key_mgmt;
908 if (0) {
909 #ifdef CONFIG_IEEE80211R
910 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
911 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
912 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
913 } else if (sel & WPA_KEY_MGMT_FT_PSK) {
914 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
915 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
916 #endif /* CONFIG_IEEE80211R */
917 #ifdef CONFIG_IEEE80211W
918 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
919 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
920 wpa_msg(wpa_s, MSG_DEBUG,
921 "WPA: using KEY_MGMT 802.1X with SHA256");
922 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
923 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
924 wpa_msg(wpa_s, MSG_DEBUG,
925 "WPA: using KEY_MGMT PSK with SHA256");
926 #endif /* CONFIG_IEEE80211W */
927 } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
928 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
929 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
930 } else if (sel & WPA_KEY_MGMT_PSK) {
931 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
932 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
933 } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
934 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
935 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
936 } else {
937 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
938 "key management type.");
939 return -1;
940 }
942 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
943 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
944 wpa_s->pairwise_cipher);
945 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
947 #ifdef CONFIG_IEEE80211W
948 sel = ie.mgmt_group_cipher;
949 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
950 !(ie.capabilities & WPA_CAPABILITY_MFPC))
951 sel = 0;
952 if (sel & WPA_CIPHER_AES_128_CMAC) {
953 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
954 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
955 "AES-128-CMAC");
956 } else {
957 wpa_s->mgmt_group_cipher = 0;
958 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
959 }
960 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
961 wpa_s->mgmt_group_cipher);
962 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
963 #endif /* CONFIG_IEEE80211W */
965 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
966 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
967 return -1;
968 }
970 if (ssid->key_mgmt &
971 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
972 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
973 else
974 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
976 return 0;
977 }
980 /**
981 * wpa_supplicant_associate - Request association
982 * @wpa_s: Pointer to wpa_supplicant data
983 * @bss: Scan results for the selected BSS, or %NULL if not available
984 * @ssid: Configuration data for the selected network
985 *
986 * This function is used to request %wpa_supplicant to associate with a BSS.
987 */
988 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
989 struct wpa_bss *bss, struct wpa_ssid *ssid)
990 {
991 u8 wpa_ie[80];
992 size_t wpa_ie_len;
993 int use_crypt, ret, i, bssid_changed;
994 int algs = WPA_AUTH_ALG_OPEN;
995 enum wpa_cipher cipher_pairwise, cipher_group;
996 struct wpa_driver_associate_params params;
997 int wep_keys_set = 0;
998 struct wpa_driver_capa capa;
999 int assoc_failed = 0;
1000 struct wpa_ssid *old_ssid;
1002 if (ssid->mode == WPAS_MODE_AP) {
1003 #ifdef CONFIG_AP
1004 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1005 wpa_printf(MSG_INFO, "Driver does not support AP "
1006 "mode");
1007 return;
1008 }
1009 wpa_supplicant_create_ap(wpa_s, ssid);
1010 wpa_s->current_bss = bss;
1011 #else /* CONFIG_AP */
1012 wpa_printf(MSG_ERROR, "AP mode support not included in the "
1013 "build");
1014 #endif /* CONFIG_AP */
1015 return;
1016 }
1018 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1019 ssid->mode == IEEE80211_MODE_INFRA) {
1020 sme_authenticate(wpa_s, bss, ssid);
1021 return;
1022 }
1024 wpa_s->reassociate = 0;
1025 if (bss) {
1026 #ifdef CONFIG_IEEE80211R
1027 const u8 *ie, *md = NULL;
1028 #endif /* CONFIG_IEEE80211R */
1029 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1030 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1031 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1032 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1033 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1034 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1035 if (bssid_changed)
1036 wpas_notify_bssid_changed(wpa_s);
1037 #ifdef CONFIG_IEEE80211R
1038 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1039 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1040 md = ie + 2;
1041 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1042 if (md) {
1043 /* Prepare for the next transition */
1044 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1045 }
1046 #endif /* CONFIG_IEEE80211R */
1047 #ifdef CONFIG_WPS
1048 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1049 wpa_s->conf->ap_scan == 2 &&
1050 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1051 /* Use ap_scan==1 style network selection to find the network
1052 */
1053 wpa_s->scan_req = 2;
1054 wpa_s->reassociate = 1;
1055 wpa_supplicant_req_scan(wpa_s, 0, 0);
1056 return;
1057 #endif /* CONFIG_WPS */
1058 } else {
1059 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1060 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1061 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1062 }
1063 wpa_supplicant_cancel_scan(wpa_s);
1065 /* Starting new association, so clear the possibly used WPA IE from the
1066 * previous association. */
1067 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1069 #ifdef IEEE8021X_EAPOL
1070 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1071 if (ssid->leap) {
1072 if (ssid->non_leap == 0)
1073 algs = WPA_AUTH_ALG_LEAP;
1074 else
1075 algs |= WPA_AUTH_ALG_LEAP;
1076 }
1077 }
1078 #endif /* IEEE8021X_EAPOL */
1079 wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1080 if (ssid->auth_alg) {
1081 algs = ssid->auth_alg;
1082 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1083 algs);
1084 }
1086 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1087 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1088 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1089 WPA_KEY_MGMT_FT_IEEE8021X |
1090 WPA_KEY_MGMT_FT_PSK |
1091 WPA_KEY_MGMT_IEEE8021X_SHA256 |
1092 WPA_KEY_MGMT_PSK_SHA256))) {
1093 int try_opportunistic;
1094 try_opportunistic = ssid->proactive_key_caching &&
1095 (ssid->proto & WPA_PROTO_RSN);
1096 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1097 wpa_s->current_ssid,
1098 try_opportunistic) == 0)
1099 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1100 wpa_ie_len = sizeof(wpa_ie);
1101 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1102 wpa_ie, &wpa_ie_len)) {
1103 wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1104 "management and encryption suites");
1105 return;
1106 }
1107 } else if (ssid->key_mgmt &
1108 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1109 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1110 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1111 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1112 wpa_ie_len = sizeof(wpa_ie);
1113 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1114 wpa_ie, &wpa_ie_len)) {
1115 wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1116 "management and encryption suites (no scan "
1117 "results)");
1118 return;
1119 }
1120 #ifdef CONFIG_WPS
1121 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1122 struct wpabuf *wps_ie;
1123 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1124 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1125 wpa_ie_len = wpabuf_len(wps_ie);
1126 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1127 } else
1128 wpa_ie_len = 0;
1129 wpabuf_free(wps_ie);
1130 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1131 #endif /* CONFIG_WPS */
1132 } else {
1133 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1134 wpa_ie_len = 0;
1135 }
1137 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1138 use_crypt = 1;
1139 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1140 cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1141 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1142 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1143 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1144 use_crypt = 0;
1145 if (wpa_set_wep_keys(wpa_s, ssid)) {
1146 use_crypt = 1;
1147 wep_keys_set = 1;
1148 }
1149 }
1150 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1151 use_crypt = 0;
1153 #ifdef IEEE8021X_EAPOL
1154 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1155 if ((ssid->eapol_flags &
1156 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1157 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1158 !wep_keys_set) {
1159 use_crypt = 0;
1160 } else {
1161 /* Assume that dynamic WEP-104 keys will be used and
1162 * set cipher suites in order for drivers to expect
1163 * encryption. */
1164 cipher_pairwise = cipher_group = CIPHER_WEP104;
1165 }
1166 }
1167 #endif /* IEEE8021X_EAPOL */
1169 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1170 /* Set the key before (and later after) association */
1171 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1172 }
1174 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1175 os_memset(¶ms, 0, sizeof(params));
1176 if (bss) {
1177 params.bssid = bss->bssid;
1178 params.ssid = bss->ssid;
1179 params.ssid_len = bss->ssid_len;
1180 params.freq = bss->freq;
1181 } else {
1182 params.ssid = ssid->ssid;
1183 params.ssid_len = ssid->ssid_len;
1184 }
1185 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1186 params.freq == 0)
1187 params.freq = ssid->frequency; /* Initial channel for IBSS */
1188 params.wpa_ie = wpa_ie;
1189 params.wpa_ie_len = wpa_ie_len;
1190 params.pairwise_suite = cipher_pairwise;
1191 params.group_suite = cipher_group;
1192 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1193 params.auth_alg = algs;
1194 params.mode = ssid->mode;
1195 for (i = 0; i < NUM_WEP_KEYS; i++) {
1196 if (ssid->wep_key_len[i])
1197 params.wep_key[i] = ssid->wep_key[i];
1198 params.wep_key_len[i] = ssid->wep_key_len[i];
1199 }
1200 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1202 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1203 (params.key_mgmt_suite == KEY_MGMT_PSK ||
1204 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1205 params.passphrase = ssid->passphrase;
1206 if (ssid->psk_set)
1207 params.psk = ssid->psk;
1208 }
1210 params.drop_unencrypted = use_crypt;
1212 #ifdef CONFIG_IEEE80211W
1213 params.mgmt_frame_protection = ssid->ieee80211w;
1214 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1215 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1216 struct wpa_ie_data ie;
1217 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1218 ie.capabilities &
1219 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1220 wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1221 "require MFP");
1222 params.mgmt_frame_protection =
1223 MGMT_FRAME_PROTECTION_REQUIRED;
1224 }
1225 }
1226 #endif /* CONFIG_IEEE80211W */
1228 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1229 ret = ieee80211_sta_associate(wpa_s, ¶ms);
1230 else
1231 ret = wpa_drv_associate(wpa_s, ¶ms);
1232 if (ret < 0) {
1233 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1234 "failed");
1235 /* try to continue anyway; new association will be tried again
1236 * after timeout */
1237 assoc_failed = 1;
1238 }
1240 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1241 /* Set the key after the association just in case association
1242 * cleared the previously configured key. */
1243 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1244 /* No need to timeout authentication since there is no key
1245 * management. */
1246 wpa_supplicant_cancel_auth_timeout(wpa_s);
1247 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1248 #ifdef CONFIG_IBSS_RSN
1249 } else if (ssid->mode == WPAS_MODE_IBSS &&
1250 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1251 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1252 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1253 /*
1254 * RSN IBSS authentication is per-STA and we can disable the
1255 * per-BSSID authentication.
1256 */
1257 wpa_supplicant_cancel_auth_timeout(wpa_s);
1258 #endif /* CONFIG_IBSS_RSN */
1259 } else {
1260 /* Timeout for IEEE 802.11 authentication and association */
1261 int timeout = 60;
1263 if (assoc_failed) {
1264 /* give IBSS a bit more time */
1265 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1266 } else if (wpa_s->conf->ap_scan == 1) {
1267 /* give IBSS a bit more time */
1268 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1269 }
1270 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1271 }
1273 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1274 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1275 /* Set static WEP keys again */
1276 wpa_set_wep_keys(wpa_s, ssid);
1277 }
1279 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1280 /*
1281 * Do not allow EAP session resumption between different
1282 * network configurations.
1283 */
1284 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1285 }
1286 old_ssid = wpa_s->current_ssid;
1287 wpa_s->current_ssid = ssid;
1288 wpa_s->current_bss = bss;
1289 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1290 wpa_supplicant_initiate_eapol(wpa_s);
1291 if (old_ssid != wpa_s->current_ssid)
1292 wpas_notify_network_changed(wpa_s);
1293 }
1296 /**
1297 * wpa_supplicant_disassociate - Disassociate the current connection
1298 * @wpa_s: Pointer to wpa_supplicant data
1299 * @reason_code: IEEE 802.11 reason code for the disassociate frame
1300 *
1301 * This function is used to request %wpa_supplicant to disassociate with the
1302 * current AP.
1303 */
1304 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1305 int reason_code)
1306 {
1307 struct wpa_ssid *old_ssid;
1308 u8 *addr = NULL;
1310 if (!is_zero_ether_addr(wpa_s->bssid)) {
1311 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1312 ieee80211_sta_disassociate(wpa_s, reason_code);
1313 else
1314 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1315 addr = wpa_s->bssid;
1316 }
1317 wpa_clear_keys(wpa_s, addr);
1318 wpa_supplicant_mark_disassoc(wpa_s);
1319 old_ssid = wpa_s->current_ssid;
1320 wpa_s->current_ssid = NULL;
1321 wpa_s->current_bss = NULL;
1322 wpa_sm_set_config(wpa_s->wpa, NULL);
1323 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1324 if (old_ssid != wpa_s->current_ssid)
1325 wpas_notify_network_changed(wpa_s);
1326 }
1329 /**
1330 * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1331 * @wpa_s: Pointer to wpa_supplicant data
1332 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1333 *
1334 * This function is used to request %wpa_supplicant to deauthenticate from the
1335 * current AP.
1336 */
1337 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1338 int reason_code)
1339 {
1340 struct wpa_ssid *old_ssid;
1341 u8 *addr = NULL;
1343 if (!is_zero_ether_addr(wpa_s->bssid)) {
1344 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1345 ieee80211_sta_deauthenticate(wpa_s, reason_code);
1346 else
1347 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1348 reason_code);
1349 addr = wpa_s->bssid;
1350 }
1351 wpa_clear_keys(wpa_s, addr);
1352 wpa_supplicant_mark_disassoc(wpa_s);
1353 old_ssid = wpa_s->current_ssid;
1354 wpa_s->current_ssid = NULL;
1355 wpa_s->current_bss = NULL;
1356 wpa_sm_set_config(wpa_s->wpa, NULL);
1357 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1358 if (old_ssid != wpa_s->current_ssid)
1359 wpas_notify_network_changed(wpa_s);
1360 }
1363 /**
1364 * wpa_supplicant_enable_network - Mark a configured network as enabled
1365 * @wpa_s: wpa_supplicant structure for a network interface
1366 * @ssid: wpa_ssid structure for a configured network or %NULL
1367 *
1368 * Enables the specified network or all networks if no network specified.
1369 */
1370 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1371 struct wpa_ssid *ssid)
1372 {
1373 struct wpa_ssid *other_ssid;
1374 int was_disabled;
1376 if (ssid == NULL) {
1377 other_ssid = wpa_s->conf->ssid;
1378 while (other_ssid) {
1379 if (other_ssid == wpa_s->current_ssid &&
1380 other_ssid->disabled)
1381 wpa_s->reassociate = 1;
1383 was_disabled = other_ssid->disabled;
1385 other_ssid->disabled = 0;
1387 if (was_disabled != other_ssid->disabled)
1388 wpas_notify_network_enabled_changed(
1389 wpa_s, other_ssid);
1391 other_ssid = other_ssid->next;
1392 }
1393 if (wpa_s->reassociate)
1394 wpa_supplicant_req_scan(wpa_s, 0, 0);
1395 } else if (wpa_s->current_ssid == NULL && ssid->disabled) {
1396 /*
1397 * Try to reassociate since there is no current configuration
1398 * and a new network was made available.
1399 */
1400 wpa_s->reassociate = 1;
1401 wpa_supplicant_req_scan(wpa_s, 0, 0);
1403 was_disabled = ssid->disabled;
1405 ssid->disabled = 0;
1407 if (was_disabled != ssid->disabled)
1408 wpas_notify_network_enabled_changed(wpa_s, ssid);
1409 }
1410 }
1413 /**
1414 * wpa_supplicant_disable_network - Mark a configured network as disabled
1415 * @wpa_s: wpa_supplicant structure for a network interface
1416 * @ssid: wpa_ssid structure for a configured network or %NULL
1417 *
1418 * Disables the specified network or all networks if no network specified.
1419 */
1420 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1421 struct wpa_ssid *ssid)
1422 {
1423 struct wpa_ssid *other_ssid;
1424 int was_disabled;
1426 if (ssid == NULL) {
1427 other_ssid = wpa_s->conf->ssid;
1428 while (other_ssid) {
1429 was_disabled = other_ssid->disabled;
1431 other_ssid->disabled = 1;
1433 if (was_disabled != other_ssid->disabled)
1434 wpas_notify_network_enabled_changed(
1435 wpa_s, other_ssid);
1437 other_ssid = other_ssid->next;
1438 }
1439 if (wpa_s->current_ssid)
1440 wpa_supplicant_disassociate(
1441 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1442 } else {
1443 if (ssid == wpa_s->current_ssid)
1444 wpa_supplicant_disassociate(
1445 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1447 was_disabled = ssid->disabled;
1449 ssid->disabled = 1;
1451 if (was_disabled != ssid->disabled)
1452 wpas_notify_network_enabled_changed(wpa_s, ssid);
1453 }
1454 }
1457 /**
1458 * wpa_supplicant_select_network - Attempt association with a network
1459 * @wpa_s: wpa_supplicant structure for a network interface
1460 * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1461 */
1462 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1463 struct wpa_ssid *ssid)
1464 {
1466 struct wpa_ssid *other_ssid;
1468 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1469 wpa_supplicant_disassociate(
1470 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1472 /*
1473 * Mark all other networks disabled or mark all networks enabled if no
1474 * network specified.
1475 */
1476 other_ssid = wpa_s->conf->ssid;
1477 while (other_ssid) {
1478 int was_disabled = other_ssid->disabled;
1480 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1482 if (was_disabled != other_ssid->disabled)
1483 wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1485 other_ssid = other_ssid->next;
1486 }
1487 wpa_s->disconnected = 0;
1488 wpa_s->reassociate = 1;
1489 wpa_supplicant_req_scan(wpa_s, 0, 0);
1491 if (ssid)
1492 wpas_notify_network_selected(wpa_s, ssid);
1493 }
1496 /**
1497 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1498 * @wpa_s: wpa_supplicant structure for a network interface
1499 * @ap_scan: AP scan mode
1500 * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1501 *
1502 */
1503 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1504 {
1506 int old_ap_scan;
1508 if (ap_scan < 0 || ap_scan > 2)
1509 return -1;
1511 old_ap_scan = wpa_s->conf->ap_scan;
1512 wpa_s->conf->ap_scan = ap_scan;
1514 if (old_ap_scan != wpa_s->conf->ap_scan)
1515 wpas_notify_ap_scan_changed(wpa_s);
1517 return 0;
1518 }
1521 /**
1522 * wpa_supplicant_set_debug_params - Set global debug params
1523 * @global: wpa_global structure
1524 * @debug_level: debug level
1525 * @debug_timestamp: determines if show timestamp in debug data
1526 * @debug_show_keys: determines if show keys in debug data
1527 * Returns: 0 if succeed or -1 if debug_level has wrong value
1528 */
1529 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1530 int debug_timestamp, int debug_show_keys)
1531 {
1533 int old_level, old_timestamp, old_show_keys;
1535 /* check for allowed debuglevels */
1536 if (debug_level != MSG_MSGDUMP &&
1537 debug_level != MSG_DEBUG &&
1538 debug_level != MSG_INFO &&
1539 debug_level != MSG_WARNING &&
1540 debug_level != MSG_ERROR)
1541 return -1;
1543 old_level = wpa_debug_level;
1544 old_timestamp = wpa_debug_timestamp;
1545 old_show_keys = wpa_debug_show_keys;
1547 wpa_debug_level = debug_level;
1548 wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1549 wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1551 if (wpa_debug_level != old_level)
1552 wpas_notify_debug_level_changed(global);
1553 if (wpa_debug_timestamp != old_timestamp)
1554 wpas_notify_debug_timestamp_changed(global);
1555 if (wpa_debug_show_keys != old_show_keys)
1556 wpas_notify_debug_show_keys_changed(global);
1558 return 0;
1559 }
1562 /**
1563 * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1564 * @wpa_s: Pointer to wpa_supplicant data
1565 * Returns: A pointer to the current network structure or %NULL on failure
1566 */
1567 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1568 {
1569 struct wpa_ssid *entry;
1570 u8 ssid[MAX_SSID_LEN];
1571 int res;
1572 size_t ssid_len;
1573 u8 bssid[ETH_ALEN];
1574 int wired;
1576 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1577 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1578 wpa_printf(MSG_WARNING, "Could not read SSID from "
1579 "MLME.");
1580 return NULL;
1581 }
1582 } else {
1583 res = wpa_drv_get_ssid(wpa_s, ssid);
1584 if (res < 0) {
1585 wpa_printf(MSG_WARNING, "Could not read SSID from "
1586 "driver.");
1587 return NULL;
1588 }
1589 ssid_len = res;
1590 }
1592 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1593 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1594 else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1595 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1596 return NULL;
1597 }
1599 wired = wpa_s->conf->ap_scan == 0 &&
1600 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1602 entry = wpa_s->conf->ssid;
1603 while (entry) {
1604 if (!entry->disabled &&
1605 ((ssid_len == entry->ssid_len &&
1606 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1607 (!entry->bssid_set ||
1608 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1609 return entry;
1610 #ifdef CONFIG_WPS
1611 if (!entry->disabled &&
1612 (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1613 (entry->ssid == NULL || entry->ssid_len == 0) &&
1614 (!entry->bssid_set ||
1615 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1616 return entry;
1617 #endif /* CONFIG_WPS */
1618 entry = entry->next;
1619 }
1621 return NULL;
1622 }
1625 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1626 const char *name)
1627 {
1628 int i;
1629 size_t len;
1630 const char *pos;
1632 if (wpa_s == NULL)
1633 return -1;
1635 if (wpa_drivers[0] == NULL) {
1636 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1637 "wpa_supplicant.");
1638 return -1;
1639 }
1641 if (name == NULL) {
1642 /* default to first driver in the list */
1643 wpa_s->driver = wpa_drivers[0];
1644 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
1645 return 0;
1646 }
1648 pos = os_strchr(name, ',');
1649 if (pos)
1650 len = pos - name;
1651 else
1652 len = os_strlen(name);
1653 for (i = 0; wpa_drivers[i]; i++) {
1654 if (os_strlen(wpa_drivers[i]->name) == len &&
1655 os_strncmp(name, wpa_drivers[i]->name, len) ==
1656 0) {
1657 wpa_s->driver = wpa_drivers[i];
1658 wpa_s->global_drv_priv = wpa_s->global->drv_priv[i];
1659 return 0;
1660 }
1661 }
1663 wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1664 return -1;
1665 }
1668 /**
1669 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1670 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1671 * with struct wpa_driver_ops::init()
1672 * @src_addr: Source address of the EAPOL frame
1673 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1674 * @len: Length of the EAPOL data
1675 *
1676 * This function is called for each received EAPOL frame. Most driver
1677 * interfaces rely on more generic OS mechanism for receiving frames through
1678 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1679 * take care of received EAPOL frames and deliver them to the core supplicant
1680 * code by calling this function.
1681 */
1682 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1683 const u8 *buf, size_t len)
1684 {
1685 struct wpa_supplicant *wpa_s = ctx;
1687 wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1688 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1690 if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1691 /*
1692 * There is possible race condition between receiving the
1693 * association event and the EAPOL frame since they are coming
1694 * through different paths from the driver. In order to avoid
1695 * issues in trying to process the EAPOL frame before receiving
1696 * association information, lets queue it for processing until
1697 * the association event is received.
1698 */
1699 wpa_printf(MSG_DEBUG, "Not associated - Delay processing of "
1700 "received EAPOL frame");
1701 wpabuf_free(wpa_s->pending_eapol_rx);
1702 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1703 if (wpa_s->pending_eapol_rx) {
1704 os_get_time(&wpa_s->pending_eapol_rx_time);
1705 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1706 ETH_ALEN);
1707 }
1708 return;
1709 }
1711 #ifdef CONFIG_AP
1712 if (wpa_s->ap_iface) {
1713 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1714 return;
1715 }
1716 #endif /* CONFIG_AP */
1718 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1719 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1720 "no key management is configured");
1721 return;
1722 }
1724 if (wpa_s->eapol_received == 0 &&
1725 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1726 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1727 wpa_s->wpa_state != WPA_COMPLETED) &&
1728 (wpa_s->current_ssid == NULL ||
1729 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
1730 /* Timeout for completing IEEE 802.1X and WPA authentication */
1731 wpa_supplicant_req_auth_timeout(
1732 wpa_s,
1733 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1734 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1735 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1736 70 : 10, 0);
1737 }
1738 wpa_s->eapol_received++;
1740 if (wpa_s->countermeasures) {
1741 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1742 "packet");
1743 return;
1744 }
1746 #ifdef CONFIG_IBSS_RSN
1747 if (wpa_s->current_ssid &&
1748 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
1749 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1750 return;
1751 }
1752 #endif /* CONFIG_IBSS_RSN */
1754 /* Source address of the incoming EAPOL frame could be compared to the
1755 * current BSSID. However, it is possible that a centralized
1756 * Authenticator could be using another MAC address than the BSSID of
1757 * an AP, so just allow any address to be used for now. The replies are
1758 * still sent to the current BSSID (if available), though. */
1760 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1761 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1762 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1763 return;
1764 wpa_drv_poll(wpa_s);
1765 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1766 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1767 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1768 /*
1769 * Set portValid = TRUE here since we are going to skip 4-way
1770 * handshake processing which would normally set portValid. We
1771 * need this to allow the EAPOL state machines to be completed
1772 * without going through EAPOL-Key handshake.
1773 */
1774 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1775 }
1776 }
1779 /**
1780 * wpa_supplicant_driver_init - Initialize driver interface parameters
1781 * @wpa_s: Pointer to wpa_supplicant data
1782 * Returns: 0 on success, -1 on failure
1783 *
1784 * This function is called to initialize driver interface parameters.
1785 * wpa_drv_init() must have been called before this function to initialize the
1786 * driver interface.
1787 */
1788 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1789 {
1790 static int interface_count = 0;
1792 if (wpa_s->driver->send_eapol) {
1793 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1794 if (addr)
1795 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1796 } else {
1797 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1798 wpa_drv_get_mac_addr(wpa_s),
1799 ETH_P_EAPOL,
1800 wpa_supplicant_rx_eapol, wpa_s, 0);
1801 if (wpa_s->l2 == NULL)
1802 return -1;
1803 }
1805 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1806 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1807 return -1;
1808 }
1810 wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1811 MAC2STR(wpa_s->own_addr));
1813 if (wpa_s->bridge_ifname[0]) {
1814 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1815 " '%s'", wpa_s->bridge_ifname);
1816 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1817 wpa_s->own_addr,
1818 ETH_P_EAPOL,
1819 wpa_supplicant_rx_eapol, wpa_s,
1820 0);
1821 if (wpa_s->l2_br == NULL) {
1822 wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1823 "connection for the bridge interface '%s'",
1824 wpa_s->bridge_ifname);
1825 return -1;
1826 }
1827 }
1829 wpa_clear_keys(wpa_s, NULL);
1831 /* Make sure that TKIP countermeasures are not left enabled (could
1832 * happen if wpa_supplicant is killed during countermeasures. */
1833 wpa_drv_set_countermeasures(wpa_s, 0);
1835 wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1836 wpa_drv_flush_pmkid(wpa_s);
1838 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1839 wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1840 interface_count++;
1842 return 0;
1843 }
1846 static int wpa_supplicant_daemon(const char *pid_file)
1847 {
1848 wpa_printf(MSG_DEBUG, "Daemonize..");
1849 return os_daemonize(pid_file);
1850 }
1853 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1854 {
1855 struct wpa_supplicant *wpa_s;
1857 wpa_s = os_zalloc(sizeof(*wpa_s));
1858 if (wpa_s == NULL)
1859 return NULL;
1860 wpa_s->scan_req = 1;
1861 wpa_s->new_connection = 1;
1863 return wpa_s;
1864 }
1867 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1868 struct wpa_interface *iface)
1869 {
1870 const char *ifname, *driver;
1871 struct wpa_driver_capa capa;
1873 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1874 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1875 iface->confname ? iface->confname : "N/A",
1876 iface->driver ? iface->driver : "default",
1877 iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1878 iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1880 if (iface->confname) {
1881 #ifdef CONFIG_BACKEND_FILE
1882 wpa_s->confname = os_rel2abs_path(iface->confname);
1883 if (wpa_s->confname == NULL) {
1884 wpa_printf(MSG_ERROR, "Failed to get absolute path "
1885 "for configuration file '%s'.",
1886 iface->confname);
1887 return -1;
1888 }
1889 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1890 iface->confname, wpa_s->confname);
1891 #else /* CONFIG_BACKEND_FILE */
1892 wpa_s->confname = os_strdup(iface->confname);
1893 #endif /* CONFIG_BACKEND_FILE */
1894 wpa_s->conf = wpa_config_read(wpa_s->confname);
1895 if (wpa_s->conf == NULL) {
1896 wpa_printf(MSG_ERROR, "Failed to read or parse "
1897 "configuration '%s'.", wpa_s->confname);
1898 return -1;
1899 }
1901 /*
1902 * Override ctrl_interface and driver_param if set on command
1903 * line.
1904 */
1905 if (iface->ctrl_interface) {
1906 os_free(wpa_s->conf->ctrl_interface);
1907 wpa_s->conf->ctrl_interface =
1908 os_strdup(iface->ctrl_interface);
1909 }
1911 if (iface->driver_param) {
1912 os_free(wpa_s->conf->driver_param);
1913 wpa_s->conf->driver_param =
1914 os_strdup(iface->driver_param);
1915 }
1916 } else
1917 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1918 iface->driver_param);
1920 if (wpa_s->conf == NULL) {
1921 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1922 return -1;
1923 }
1925 if (iface->ifname == NULL) {
1926 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1927 return -1;
1928 }
1929 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1930 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1931 iface->ifname);
1932 return -1;
1933 }
1934 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1936 if (iface->bridge_ifname) {
1937 if (os_strlen(iface->bridge_ifname) >=
1938 sizeof(wpa_s->bridge_ifname)) {
1939 wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1940 "name '%s'.", iface->bridge_ifname);
1941 return -1;
1942 }
1943 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1944 sizeof(wpa_s->bridge_ifname));
1945 }
1947 /* RSNA Supplicant Key Management - INITIALIZE */
1948 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1949 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1951 /* Initialize driver interface and register driver event handler before
1952 * L2 receive handler so that association events are processed before
1953 * EAPOL-Key packets if both become available for the same select()
1954 * call. */
1955 driver = iface->driver;
1956 next_driver:
1957 if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
1958 return -1;
1960 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
1961 if (wpa_s->drv_priv == NULL) {
1962 const char *pos;
1963 pos = driver ? os_strchr(driver, ',') : NULL;
1964 if (pos) {
1965 wpa_printf(MSG_DEBUG, "Failed to initialize driver "
1966 "interface - try next driver wrapper");
1967 driver = pos + 1;
1968 goto next_driver;
1969 }
1970 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
1971 return -1;
1972 }
1973 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
1974 wpa_printf(MSG_ERROR, "Driver interface rejected "
1975 "driver_param '%s'", wpa_s->conf->driver_param);
1976 return -1;
1977 }
1979 ifname = wpa_drv_get_ifname(wpa_s);
1980 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
1981 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
1982 "name with '%s'", ifname);
1983 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
1984 }
1986 if (wpa_supplicant_init_wpa(wpa_s) < 0)
1987 return -1;
1989 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
1990 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
1991 NULL);
1992 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
1994 if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
1995 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
1996 wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
1997 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1998 "dot11RSNAConfigPMKLifetime");
1999 return -1;
2000 }
2002 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2003 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2004 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2005 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2006 "dot11RSNAConfigPMKReauthThreshold");
2007 return -1;
2008 }
2010 if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2011 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2012 wpa_s->conf->dot11RSNAConfigSATimeout)) {
2013 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2014 "dot11RSNAConfigSATimeout");
2015 return -1;
2016 }
2018 if (wpa_supplicant_driver_init(wpa_s) < 0)
2019 return -1;
2021 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2022 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2023 wpa_printf(MSG_DEBUG, "Failed to set country");
2024 return -1;
2025 }
2027 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2029 if (wpas_wps_init(wpa_s))
2030 return -1;
2032 if (wpa_supplicant_init_eapol(wpa_s) < 0)
2033 return -1;
2034 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2036 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2037 if (wpa_s->ctrl_iface == NULL) {
2038 wpa_printf(MSG_ERROR,
2039 "Failed to initialize control interface '%s'.\n"
2040 "You may have another wpa_supplicant process "
2041 "already running or the file was\n"
2042 "left by an unclean termination of wpa_supplicant "
2043 "in which case you will need\n"
2044 "to manually remove this file before starting "
2045 "wpa_supplicant again.\n",
2046 wpa_s->conf->ctrl_interface);
2047 return -1;
2048 }
2050 if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2051 wpa_s->drv_flags = capa.flags;
2052 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2053 if (ieee80211_sta_init(wpa_s))
2054 return -1;
2055 }
2056 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2057 }
2059 #ifdef CONFIG_IBSS_RSN
2060 wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2061 if (!wpa_s->ibss_rsn) {
2062 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
2063 return -1;
2064 }
2065 #endif /* CONFIG_IBSS_RSN */
2067 if (wpa_bss_init(wpa_s) < 0)
2068 return -1;
2070 return 0;
2071 }
2074 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2075 int notify)
2076 {
2077 if (wpa_s->drv_priv) {
2078 wpa_supplicant_deauthenticate(wpa_s,
2079 WLAN_REASON_DEAUTH_LEAVING);
2081 wpa_drv_set_countermeasures(wpa_s, 0);
2082 wpa_clear_keys(wpa_s, NULL);
2083 }
2085 wpa_supplicant_cleanup(wpa_s);
2087 if (notify)
2088 wpas_notify_iface_removed(wpa_s);
2090 if (wpa_s->drv_priv)
2091 wpa_drv_deinit(wpa_s);
2092 }
2095 /**
2096 * wpa_supplicant_add_iface - Add a new network interface
2097 * @global: Pointer to global data from wpa_supplicant_init()
2098 * @iface: Interface configuration options
2099 * Returns: Pointer to the created interface or %NULL on failure
2100 *
2101 * This function is used to add new network interfaces for %wpa_supplicant.
2102 * This can be called before wpa_supplicant_run() to add interfaces before the
2103 * main event loop has been started. In addition, new interfaces can be added
2104 * dynamically while %wpa_supplicant is already running. This could happen,
2105 * e.g., when a hotplug network adapter is inserted.
2106 */
2107 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2108 struct wpa_interface *iface)
2109 {
2110 struct wpa_supplicant *wpa_s;
2111 struct wpa_interface t_iface;
2112 struct wpa_ssid *ssid;
2114 if (global == NULL || iface == NULL)
2115 return NULL;
2117 wpa_s = wpa_supplicant_alloc();
2118 if (wpa_s == NULL)
2119 return NULL;
2121 wpa_s->global = global;
2123 t_iface = *iface;
2124 if (global->params.override_driver) {
2125 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2126 "('%s' -> '%s')",
2127 iface->driver, global->params.override_driver);
2128 t_iface.driver = global->params.override_driver;
2129 }
2130 if (global->params.override_ctrl_interface) {
2131 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2132 "ctrl_interface ('%s' -> '%s')",
2133 iface->ctrl_interface,
2134 global->params.override_ctrl_interface);
2135 t_iface.ctrl_interface =
2136 global->params.override_ctrl_interface;
2137 }
2138 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2139 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2140 iface->ifname);
2141 wpa_supplicant_deinit_iface(wpa_s, 0);
2142 os_free(wpa_s);
2143 return NULL;
2144 }
2146 /* Notify the control interfaces about new iface */
2147 if (wpas_notify_iface_added(wpa_s)) {
2148 wpa_supplicant_deinit_iface(wpa_s, 1);
2149 os_free(wpa_s);
2150 return NULL;
2151 }
2153 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2154 wpas_notify_network_added(wpa_s, ssid);
2156 wpa_s->next = global->ifaces;
2157 global->ifaces = wpa_s;
2159 wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2161 return wpa_s;
2162 }
2165 /**
2166 * wpa_supplicant_remove_iface - Remove a network interface
2167 * @global: Pointer to global data from wpa_supplicant_init()
2168 * @wpa_s: Pointer to the network interface to be removed
2169 * Returns: 0 if interface was removed, -1 if interface was not found
2170 *
2171 * This function can be used to dynamically remove network interfaces from
2172 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2173 * addition, this function is used to remove all remaining interfaces when
2174 * %wpa_supplicant is terminated.
2175 */
2176 int wpa_supplicant_remove_iface(struct wpa_global *global,
2177 struct wpa_supplicant *wpa_s)
2178 {
2179 struct wpa_supplicant *prev;
2181 /* Remove interface from the global list of interfaces */
2182 prev = global->ifaces;
2183 if (prev == wpa_s) {
2184 global->ifaces = wpa_s->next;
2185 } else {
2186 while (prev && prev->next != wpa_s)
2187 prev = prev->next;
2188 if (prev == NULL)
2189 return -1;
2190 prev->next = wpa_s->next;
2191 }
2193 wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2195 wpa_supplicant_deinit_iface(wpa_s, 1);
2196 os_free(wpa_s);
2198 return 0;
2199 }
2202 /**
2203 * wpa_supplicant_get_iface - Get a new network interface
2204 * @global: Pointer to global data from wpa_supplicant_init()
2205 * @ifname: Interface name
2206 * Returns: Pointer to the interface or %NULL if not found
2207 */
2208 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2209 const char *ifname)
2210 {
2211 struct wpa_supplicant *wpa_s;
2213 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2214 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2215 return wpa_s;
2216 }
2217 return NULL;
2218 }
2221 /**
2222 * wpa_supplicant_init - Initialize %wpa_supplicant
2223 * @params: Parameters for %wpa_supplicant
2224 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2225 *
2226 * This function is used to initialize %wpa_supplicant. After successful
2227 * initialization, the returned data pointer can be used to add and remove
2228 * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2229 */
2230 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2231 {
2232 struct wpa_global *global;
2233 int ret, i;
2235 if (params == NULL)
2236 return NULL;
2238 wpa_debug_open_file(params->wpa_debug_file_path);
2239 if (params->wpa_debug_syslog)
2240 wpa_debug_open_syslog();
2242 ret = eap_register_methods();
2243 if (ret) {
2244 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2245 if (ret == -2)
2246 wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2247 "the same EAP type.");
2248 return NULL;
2249 }
2251 global = os_zalloc(sizeof(*global));
2252 if (global == NULL)
2253 return NULL;
2254 global->params.daemonize = params->daemonize;
2255 global->params.wait_for_monitor = params->wait_for_monitor;
2256 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2257 if (params->pid_file)
2258 global->params.pid_file = os_strdup(params->pid_file);
2259 if (params->ctrl_interface)
2260 global->params.ctrl_interface =
2261 os_strdup(params->ctrl_interface);
2262 if (params->override_driver)
2263 global->params.override_driver =
2264 os_strdup(params->override_driver);
2265 if (params->override_ctrl_interface)
2266 global->params.override_ctrl_interface =
2267 os_strdup(params->override_ctrl_interface);
2268 wpa_debug_level = global->params.wpa_debug_level =
2269 params->wpa_debug_level;
2270 wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2271 params->wpa_debug_show_keys;
2272 wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2273 params->wpa_debug_timestamp;
2275 if (eloop_init()) {
2276 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2277 wpa_supplicant_deinit(global);
2278 return NULL;
2279 }
2281 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2282 if (global->ctrl_iface == NULL) {
2283 wpa_supplicant_deinit(global);
2284 return NULL;
2285 }
2287 if (wpas_notify_supplicant_initialized(global)) {
2288 wpa_supplicant_deinit(global);
2289 return NULL;
2290 }
2292 for (i = 0; wpa_drivers[i]; i++)
2293 global->drv_count++;
2294 if (global->drv_count == 0) {
2295 wpa_printf(MSG_ERROR, "No drivers enabled");
2296 wpa_supplicant_deinit(global);
2297 return NULL;
2298 }
2299 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2300 if (global->drv_priv == NULL) {
2301 wpa_supplicant_deinit(global);
2302 return NULL;
2303 }
2304 for (i = 0; wpa_drivers[i]; i++) {
2305 if (!wpa_drivers[i]->global_init)
2306 continue;
2307 global->drv_priv[i] = wpa_drivers[i]->global_init();
2308 if (global->drv_priv[i] == NULL) {
2309 wpa_printf(MSG_ERROR, "Failed to initialize driver "
2310 "'%s'", wpa_drivers[i]->name);
2311 wpa_supplicant_deinit(global);
2312 return NULL;
2313 }
2314 }
2316 return global;
2317 }
2320 /**
2321 * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2322 * @global: Pointer to global data from wpa_supplicant_init()
2323 * Returns: 0 after successful event loop run, -1 on failure
2324 *
2325 * This function starts the main event loop and continues running as long as
2326 * there are any remaining events. In most cases, this function is running as
2327 * long as the %wpa_supplicant process in still in use.
2328 */
2329 int wpa_supplicant_run(struct wpa_global *global)
2330 {
2331 struct wpa_supplicant *wpa_s;
2333 if (global->params.daemonize &&
2334 wpa_supplicant_daemon(global->params.pid_file))
2335 return -1;
2337 if (global->params.wait_for_monitor) {
2338 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2339 if (wpa_s->ctrl_iface)
2340 wpa_supplicant_ctrl_iface_wait(
2341 wpa_s->ctrl_iface);
2342 }
2344 eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2345 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2347 eloop_run();
2349 return 0;
2350 }
2353 /**
2354 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2355 * @global: Pointer to global data from wpa_supplicant_init()
2356 *
2357 * This function is called to deinitialize %wpa_supplicant and to free all
2358 * allocated resources. Remaining network interfaces will also be removed.
2359 */
2360 void wpa_supplicant_deinit(struct wpa_global *global)
2361 {
2362 int i;
2364 if (global == NULL)
2365 return;
2367 while (global->ifaces)
2368 wpa_supplicant_remove_iface(global, global->ifaces);
2370 if (global->ctrl_iface)
2371 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2373 wpas_notify_supplicant_deinitialized(global);
2375 eap_peer_unregister_methods();
2376 #ifdef CONFIG_AP
2377 eap_server_unregister_methods();
2378 #endif /* CONFIG_AP */
2380 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2381 if (!global->drv_priv[i])
2382 continue;
2383 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2384 }
2385 os_free(global->drv_priv);
2387 eloop_destroy();
2389 if (global->params.pid_file) {
2390 os_daemonize_terminate(global->params.pid_file);
2391 os_free(global->params.pid_file);
2392 }
2393 os_free(global->params.ctrl_interface);
2394 os_free(global->params.override_driver);
2395 os_free(global->params.override_ctrl_interface);
2397 os_free(global);
2398 wpa_debug_close_syslog();
2399 wpa_debug_close_file();
2400 }