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 */
19 #include "includes.h"
21 #include "common.h"
22 #include "crypto/random.h"
23 #include "crypto/sha1.h"
24 #include "eapol_supp/eapol_supp_sm.h"
25 #include "eap_peer/eap.h"
26 #include "eap_server/eap_methods.h"
27 #include "rsn_supp/wpa.h"
28 #include "eloop.h"
29 #include "config.h"
30 #include "l2_packet/l2_packet.h"
31 #include "wpa_supplicant_i.h"
32 #include "driver_i.h"
33 #include "ctrl_iface.h"
34 #include "pcsc_funcs.h"
35 #include "common/version.h"
36 #include "rsn_supp/preauth.h"
37 #include "rsn_supp/pmksa_cache.h"
38 #include "common/wpa_ctrl.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 "gas_query.h"
47 #include "ap.h"
48 #include "p2p_supplicant.h"
49 #include "notify.h"
50 #include "bgscan.h"
51 #include "bss.h"
52 #include "scan.h"
53 #include "offchannel.h"
55 const char *wpa_supplicant_version =
56 "wpa_supplicant v" VERSION_STR "\n"
57 "Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi> and contributors";
59 const char *wpa_supplicant_license =
60 "This program is free software. You can distribute it and/or modify it\n"
61 "under the terms of the GNU General Public License version 2.\n"
62 "\n"
63 "Alternatively, this software may be distributed under the terms of the\n"
64 "BSD license. See README and COPYING for more details.\n"
65 #ifdef EAP_TLS_OPENSSL
66 "\nThis product includes software developed by the OpenSSL Project\n"
67 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
68 #endif /* EAP_TLS_OPENSSL */
69 ;
71 #ifndef CONFIG_NO_STDOUT_DEBUG
72 /* Long text divided into parts in order to fit in C89 strings size limits. */
73 const char *wpa_supplicant_full_license1 =
74 "This program is free software; you can redistribute it and/or modify\n"
75 "it under the terms of the GNU General Public License version 2 as\n"
76 "published by the Free Software Foundation.\n"
77 "\n"
78 "This program is distributed in the hope that it will be useful,\n"
79 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
80 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
81 "GNU General Public License for more details.\n"
82 "\n";
83 const char *wpa_supplicant_full_license2 =
84 "You should have received a copy of the GNU General Public License\n"
85 "along with this program; if not, write to the Free Software\n"
86 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n"
87 "\n"
88 "Alternatively, this software may be distributed under the terms of the\n"
89 "BSD license.\n"
90 "\n"
91 "Redistribution and use in source and binary forms, with or without\n"
92 "modification, are permitted provided that the following conditions are\n"
93 "met:\n"
94 "\n";
95 const char *wpa_supplicant_full_license3 =
96 "1. Redistributions of source code must retain the above copyright\n"
97 " notice, this list of conditions and the following disclaimer.\n"
98 "\n"
99 "2. Redistributions in binary form must reproduce the above copyright\n"
100 " notice, this list of conditions and the following disclaimer in the\n"
101 " documentation and/or other materials provided with the distribution.\n"
102 "\n";
103 const char *wpa_supplicant_full_license4 =
104 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
105 " names of its contributors may be used to endorse or promote products\n"
106 " derived from this software without specific prior written permission.\n"
107 "\n"
108 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
109 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
110 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
111 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
112 const char *wpa_supplicant_full_license5 =
113 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
114 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
115 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
116 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
117 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
118 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
119 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
120 "\n";
121 #endif /* CONFIG_NO_STDOUT_DEBUG */
123 extern int wpa_debug_level;
124 extern int wpa_debug_show_keys;
125 extern int wpa_debug_timestamp;
126 extern struct wpa_driver_ops *wpa_drivers[];
128 /* Configure default/group WEP keys for static WEP */
129 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
130 {
131 int i, set = 0;
133 for (i = 0; i < NUM_WEP_KEYS; i++) {
134 if (ssid->wep_key_len[i] == 0)
135 continue;
137 set = 1;
138 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL,
139 i, i == ssid->wep_tx_keyidx, NULL, 0,
140 ssid->wep_key[i], ssid->wep_key_len[i]);
141 }
143 return set;
144 }
147 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
148 struct wpa_ssid *ssid)
149 {
150 u8 key[32];
151 size_t keylen;
152 enum wpa_alg alg;
153 u8 seq[6] = { 0 };
155 /* IBSS/WPA-None uses only one key (Group) for both receiving and
156 * sending unicast and multicast packets. */
158 if (ssid->mode != WPAS_MODE_IBSS) {
159 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not "
160 "IBSS/ad-hoc) for WPA-None", ssid->mode);
161 return -1;
162 }
164 if (!ssid->psk_set) {
165 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for "
166 "WPA-None");
167 return -1;
168 }
170 switch (wpa_s->group_cipher) {
171 case WPA_CIPHER_CCMP:
172 os_memcpy(key, ssid->psk, 16);
173 keylen = 16;
174 alg = WPA_ALG_CCMP;
175 break;
176 case WPA_CIPHER_TKIP:
177 /* WPA-None uses the same Michael MIC key for both TX and RX */
178 os_memcpy(key, ssid->psk, 16 + 8);
179 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
180 keylen = 32;
181 alg = WPA_ALG_TKIP;
182 break;
183 default:
184 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for "
185 "WPA-None", wpa_s->group_cipher);
186 return -1;
187 }
189 /* TODO: should actually remember the previously used seq#, both for TX
190 * and RX from each STA.. */
192 return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen);
193 }
196 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
197 {
198 struct wpa_supplicant *wpa_s = eloop_ctx;
199 const u8 *bssid = wpa_s->bssid;
200 if (is_zero_ether_addr(bssid))
201 bssid = wpa_s->pending_bssid;
202 wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
203 MAC2STR(bssid));
204 wpa_blacklist_add(wpa_s, bssid);
205 wpa_sm_notify_disassoc(wpa_s->wpa);
206 wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
207 wpa_s->reassociate = 1;
209 /*
210 * If we timed out, the AP or the local radio may be busy.
211 * So, wait a second until scanning again.
212 */
213 wpa_supplicant_req_scan(wpa_s, 1, 0);
214 }
217 /**
218 * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
219 * @wpa_s: Pointer to wpa_supplicant data
220 * @sec: Number of seconds after which to time out authentication
221 * @usec: Number of microseconds after which to time out authentication
222 *
223 * This function is used to schedule a timeout for the current authentication
224 * attempt.
225 */
226 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
227 int sec, int usec)
228 {
229 if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
230 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
231 return;
233 wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
234 "%d usec", sec, usec);
235 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
236 eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
237 }
240 /**
241 * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
242 * @wpa_s: Pointer to wpa_supplicant data
243 *
244 * This function is used to cancel authentication timeout scheduled with
245 * wpa_supplicant_req_auth_timeout() and it is called when authentication has
246 * been completed.
247 */
248 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
249 {
250 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
251 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
252 wpa_blacklist_del(wpa_s, wpa_s->bssid);
253 }
256 /**
257 * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
258 * @wpa_s: Pointer to wpa_supplicant data
259 *
260 * This function is used to configure EAPOL state machine based on the selected
261 * authentication mode.
262 */
263 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
264 {
265 #ifdef IEEE8021X_EAPOL
266 struct eapol_config eapol_conf;
267 struct wpa_ssid *ssid = wpa_s->current_ssid;
269 #ifdef CONFIG_IBSS_RSN
270 if (ssid->mode == WPAS_MODE_IBSS &&
271 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
272 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
273 /*
274 * RSN IBSS authentication is per-STA and we can disable the
275 * per-BSSID EAPOL authentication.
276 */
277 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
278 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
279 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
280 return;
281 }
282 #endif /* CONFIG_IBSS_RSN */
284 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
285 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
287 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
288 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
289 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
290 else
291 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
293 os_memset(&eapol_conf, 0, sizeof(eapol_conf));
294 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
295 eapol_conf.accept_802_1x_keys = 1;
296 eapol_conf.required_keys = 0;
297 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
298 eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
299 }
300 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
301 eapol_conf.required_keys |=
302 EAPOL_REQUIRE_KEY_BROADCAST;
303 }
305 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
306 eapol_conf.required_keys = 0;
307 }
308 if (wpa_s->conf)
309 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
310 eapol_conf.workaround = ssid->eap_workaround;
311 eapol_conf.eap_disabled =
312 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
313 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
314 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
315 eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
316 #endif /* IEEE8021X_EAPOL */
317 }
320 /**
321 * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
322 * @wpa_s: Pointer to wpa_supplicant data
323 * @ssid: Configuration data for the network
324 *
325 * This function is used to configure WPA state machine and related parameters
326 * to a mode where WPA is not enabled. This is called as part of the
327 * authentication configuration when the selected network does not use WPA.
328 */
329 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
330 struct wpa_ssid *ssid)
331 {
332 int i;
334 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
335 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
336 else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
337 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
338 else
339 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
340 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
341 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
342 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
343 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
344 wpa_s->group_cipher = WPA_CIPHER_NONE;
345 wpa_s->mgmt_group_cipher = 0;
347 for (i = 0; i < NUM_WEP_KEYS; i++) {
348 if (ssid->wep_key_len[i] > 5) {
349 wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
350 wpa_s->group_cipher = WPA_CIPHER_WEP104;
351 break;
352 } else if (ssid->wep_key_len[i] > 0) {
353 wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
354 wpa_s->group_cipher = WPA_CIPHER_WEP40;
355 break;
356 }
357 }
359 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
360 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
361 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
362 wpa_s->pairwise_cipher);
363 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
364 #ifdef CONFIG_IEEE80211W
365 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
366 wpa_s->mgmt_group_cipher);
367 #endif /* CONFIG_IEEE80211W */
369 pmksa_cache_clear_current(wpa_s->wpa);
370 }
373 static void free_hw_features(struct wpa_supplicant *wpa_s)
374 {
375 int i;
376 if (wpa_s->hw.modes == NULL)
377 return;
379 for (i = 0; i < wpa_s->hw.num_modes; i++) {
380 os_free(wpa_s->hw.modes[i].channels);
381 os_free(wpa_s->hw.modes[i].rates);
382 }
384 os_free(wpa_s->hw.modes);
385 wpa_s->hw.modes = NULL;
386 }
389 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
390 {
391 bgscan_deinit(wpa_s);
392 scard_deinit(wpa_s->scard);
393 wpa_s->scard = NULL;
394 wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
395 eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
396 l2_packet_deinit(wpa_s->l2);
397 wpa_s->l2 = NULL;
398 if (wpa_s->l2_br) {
399 l2_packet_deinit(wpa_s->l2_br);
400 wpa_s->l2_br = NULL;
401 }
403 if (wpa_s->ctrl_iface) {
404 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
405 wpa_s->ctrl_iface = NULL;
406 }
407 if (wpa_s->conf != NULL) {
408 struct wpa_ssid *ssid;
409 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
410 wpas_notify_network_removed(wpa_s, ssid);
411 wpa_config_free(wpa_s->conf);
412 wpa_s->conf = NULL;
413 }
415 os_free(wpa_s->confname);
416 wpa_s->confname = NULL;
418 wpa_sm_set_eapol(wpa_s->wpa, NULL);
419 eapol_sm_deinit(wpa_s->eapol);
420 wpa_s->eapol = NULL;
422 rsn_preauth_deinit(wpa_s->wpa);
424 #ifdef CONFIG_TDLS
425 wpa_tdls_deinit(wpa_s->wpa);
426 #endif /* CONFIG_TDLS */
428 pmksa_candidate_free(wpa_s->wpa);
429 wpa_sm_deinit(wpa_s->wpa);
430 wpa_s->wpa = NULL;
431 wpa_blacklist_clear(wpa_s);
433 wpa_bss_deinit(wpa_s);
435 wpa_supplicant_cancel_scan(wpa_s);
436 wpa_supplicant_cancel_auth_timeout(wpa_s);
437 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, wpa_s, NULL);
438 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
439 eloop_cancel_timeout(wpa_supplicant_delayed_mic_error_report,
440 wpa_s, NULL);
441 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
443 wpas_wps_deinit(wpa_s);
445 wpabuf_free(wpa_s->pending_eapol_rx);
446 wpa_s->pending_eapol_rx = NULL;
448 #ifdef CONFIG_IBSS_RSN
449 ibss_rsn_deinit(wpa_s->ibss_rsn);
450 wpa_s->ibss_rsn = NULL;
451 #endif /* CONFIG_IBSS_RSN */
453 sme_deinit(wpa_s);
455 #ifdef CONFIG_AP
456 wpa_supplicant_ap_deinit(wpa_s);
457 #endif /* CONFIG_AP */
459 #ifdef CONFIG_P2P
460 wpas_p2p_deinit(wpa_s);
461 #endif /* CONFIG_P2P */
463 #ifdef CONFIG_OFFCHANNEL
464 offchannel_deinit(wpa_s);
465 #endif /* CONFIG_OFFCHANNEL */
467 wpa_supplicant_cancel_sched_scan(wpa_s);
469 os_free(wpa_s->next_scan_freqs);
470 wpa_s->next_scan_freqs = NULL;
472 gas_query_deinit(wpa_s->gas);
473 wpa_s->gas = NULL;
475 free_hw_features(wpa_s);
476 }
479 /**
480 * wpa_clear_keys - Clear keys configured for the driver
481 * @wpa_s: Pointer to wpa_supplicant data
482 * @addr: Previously used BSSID or %NULL if not available
483 *
484 * This function clears the encryption keys that has been previously configured
485 * for the driver.
486 */
487 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
488 {
489 if (wpa_s->keys_cleared) {
490 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
491 * timing issues with keys being cleared just before new keys
492 * are set or just after association or something similar. This
493 * shows up in group key handshake failing often because of the
494 * client not receiving the first encrypted packets correctly.
495 * Skipping some of the extra key clearing steps seems to help
496 * in completing group key handshake more reliably. */
497 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - "
498 "skip key clearing");
499 return;
500 }
502 /* MLME-DELETEKEYS.request */
503 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0);
504 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0);
505 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0);
506 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0);
507 #ifdef CONFIG_IEEE80211W
508 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0);
509 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0);
510 #endif /* CONFIG_IEEE80211W */
511 if (addr) {
512 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
513 0);
514 /* MLME-SETPROTECTION.request(None) */
515 wpa_drv_mlme_setprotection(
516 wpa_s, addr,
517 MLME_SETPROTECTION_PROTECT_TYPE_NONE,
518 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
519 }
520 wpa_s->keys_cleared = 1;
521 }
524 /**
525 * wpa_supplicant_state_txt - Get the connection state name as a text string
526 * @state: State (wpa_state; WPA_*)
527 * Returns: The state name as a printable text string
528 */
529 const char * wpa_supplicant_state_txt(enum wpa_states state)
530 {
531 switch (state) {
532 case WPA_DISCONNECTED:
533 return "DISCONNECTED";
534 case WPA_INACTIVE:
535 return "INACTIVE";
536 case WPA_INTERFACE_DISABLED:
537 return "INTERFACE_DISABLED";
538 case WPA_SCANNING:
539 return "SCANNING";
540 case WPA_AUTHENTICATING:
541 return "AUTHENTICATING";
542 case WPA_ASSOCIATING:
543 return "ASSOCIATING";
544 case WPA_ASSOCIATED:
545 return "ASSOCIATED";
546 case WPA_4WAY_HANDSHAKE:
547 return "4WAY_HANDSHAKE";
548 case WPA_GROUP_HANDSHAKE:
549 return "GROUP_HANDSHAKE";
550 case WPA_COMPLETED:
551 return "COMPLETED";
552 default:
553 return "UNKNOWN";
554 }
555 }
558 #ifdef CONFIG_BGSCAN
560 static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s)
561 {
562 if (wpas_driver_bss_selection(wpa_s))
563 return;
564 if (wpa_s->current_ssid == wpa_s->bgscan_ssid)
565 return;
567 bgscan_deinit(wpa_s);
568 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
569 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
570 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
571 "bgscan");
572 /*
573 * Live without bgscan; it is only used as a roaming
574 * optimization, so the initial connection is not
575 * affected.
576 */
577 } else
578 wpa_s->bgscan_ssid = wpa_s->current_ssid;
579 } else
580 wpa_s->bgscan_ssid = NULL;
581 }
584 static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s)
585 {
586 if (wpa_s->bgscan_ssid != NULL) {
587 bgscan_deinit(wpa_s);
588 wpa_s->bgscan_ssid = NULL;
589 }
590 }
592 #endif /* CONFIG_BGSCAN */
595 /**
596 * wpa_supplicant_set_state - Set current connection state
597 * @wpa_s: Pointer to wpa_supplicant data
598 * @state: The new connection state
599 *
600 * This function is called whenever the connection state changes, e.g.,
601 * association is completed for WPA/WPA2 4-Way Handshake is started.
602 */
603 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
604 enum wpa_states state)
605 {
606 enum wpa_states old_state = wpa_s->wpa_state;
608 wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s",
609 wpa_supplicant_state_txt(wpa_s->wpa_state),
610 wpa_supplicant_state_txt(state));
612 if (state != WPA_SCANNING)
613 wpa_supplicant_notify_scanning(wpa_s, 0);
615 if (state == WPA_COMPLETED && wpa_s->new_connection) {
616 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
617 struct wpa_ssid *ssid = wpa_s->current_ssid;
618 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
619 MACSTR " completed %s [id=%d id_str=%s]",
620 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
621 "(reauth)" : "(auth)",
622 ssid ? ssid->id : -1,
623 ssid && ssid->id_str ? ssid->id_str : "");
624 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
625 wpa_s->new_connection = 0;
626 wpa_s->reassociated_connection = 1;
627 wpa_drv_set_operstate(wpa_s, 1);
628 #ifndef IEEE8021X_EAPOL
629 wpa_drv_set_supp_port(wpa_s, 1);
630 #endif /* IEEE8021X_EAPOL */
631 wpa_s->after_wps = 0;
632 #ifdef CONFIG_P2P
633 wpas_p2p_completed(wpa_s);
634 #endif /* CONFIG_P2P */
635 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
636 state == WPA_ASSOCIATED) {
637 wpa_s->new_connection = 1;
638 wpa_drv_set_operstate(wpa_s, 0);
639 #ifndef IEEE8021X_EAPOL
640 wpa_drv_set_supp_port(wpa_s, 0);
641 #endif /* IEEE8021X_EAPOL */
642 }
643 wpa_s->wpa_state = state;
645 #ifdef CONFIG_BGSCAN
646 if (state == WPA_COMPLETED)
647 wpa_supplicant_start_bgscan(wpa_s);
648 else
649 wpa_supplicant_stop_bgscan(wpa_s);
650 #endif /* CONFIG_BGSCAN */
652 if (wpa_s->wpa_state != old_state) {
653 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
655 if (wpa_s->wpa_state == WPA_COMPLETED ||
656 old_state == WPA_COMPLETED)
657 wpas_notify_auth_changed(wpa_s);
658 }
659 }
662 void wpa_supplicant_terminate_proc(struct wpa_global *global)
663 {
664 int pending = 0;
665 #ifdef CONFIG_WPS
666 struct wpa_supplicant *wpa_s = global->ifaces;
667 while (wpa_s) {
668 if (wpas_wps_terminate_pending(wpa_s) == 1)
669 pending = 1;
670 wpa_s = wpa_s->next;
671 }
672 #endif /* CONFIG_WPS */
673 if (pending)
674 return;
675 eloop_terminate();
676 }
679 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
680 {
681 struct wpa_global *global = signal_ctx;
682 struct wpa_supplicant *wpa_s;
683 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
684 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
685 "received", sig);
686 }
687 wpa_supplicant_terminate_proc(global);
688 }
691 void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
692 {
693 enum wpa_states old_state = wpa_s->wpa_state;
695 wpa_s->pairwise_cipher = 0;
696 wpa_s->group_cipher = 0;
697 wpa_s->mgmt_group_cipher = 0;
698 wpa_s->key_mgmt = 0;
699 if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED)
700 wpa_s->wpa_state = WPA_DISCONNECTED;
702 if (wpa_s->wpa_state != old_state)
703 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
704 }
707 /**
708 * wpa_supplicant_reload_configuration - Reload configuration data
709 * @wpa_s: Pointer to wpa_supplicant data
710 * Returns: 0 on success or -1 if configuration parsing failed
711 *
712 * This function can be used to request that the configuration data is reloaded
713 * (e.g., after configuration file change). This function is reloading
714 * configuration only for one interface, so this may need to be called multiple
715 * times if %wpa_supplicant is controlling multiple interfaces and all
716 * interfaces need reconfiguration.
717 */
718 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
719 {
720 struct wpa_config *conf;
721 int reconf_ctrl;
722 int old_ap_scan;
724 if (wpa_s->confname == NULL)
725 return -1;
726 conf = wpa_config_read(wpa_s->confname);
727 if (conf == NULL) {
728 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
729 "file '%s' - exiting", wpa_s->confname);
730 return -1;
731 }
732 conf->changed_parameters = (unsigned int) -1;
734 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
735 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
736 os_strcmp(conf->ctrl_interface,
737 wpa_s->conf->ctrl_interface) != 0);
739 if (reconf_ctrl && wpa_s->ctrl_iface) {
740 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
741 wpa_s->ctrl_iface = NULL;
742 }
744 eapol_sm_invalidate_cached_session(wpa_s->eapol);
745 if (wpa_s->current_ssid) {
746 wpa_supplicant_deauthenticate(wpa_s,
747 WLAN_REASON_DEAUTH_LEAVING);
748 }
750 /*
751 * TODO: should notify EAPOL SM about changes in opensc_engine_path,
752 * pkcs11_engine_path, pkcs11_module_path.
753 */
754 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
755 /*
756 * Clear forced success to clear EAP state for next
757 * authentication.
758 */
759 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
760 }
761 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
762 wpa_sm_set_config(wpa_s->wpa, NULL);
763 wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL);
764 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
765 rsn_preauth_deinit(wpa_s->wpa);
767 old_ap_scan = wpa_s->conf->ap_scan;
768 wpa_config_free(wpa_s->conf);
769 wpa_s->conf = conf;
770 if (old_ap_scan != wpa_s->conf->ap_scan)
771 wpas_notify_ap_scan_changed(wpa_s);
773 if (reconf_ctrl)
774 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
776 wpa_supplicant_update_config(wpa_s);
778 wpa_supplicant_clear_status(wpa_s);
779 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
780 wpa_s->reassociate = 1;
781 wpa_supplicant_req_scan(wpa_s, 0, 0);
782 }
783 wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
784 return 0;
785 }
788 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
789 {
790 struct wpa_global *global = signal_ctx;
791 struct wpa_supplicant *wpa_s;
792 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
793 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring",
794 sig);
795 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
796 wpa_supplicant_terminate_proc(global);
797 }
798 }
799 }
802 enum wpa_cipher cipher_suite2driver(int cipher)
803 {
804 switch (cipher) {
805 case WPA_CIPHER_NONE:
806 return CIPHER_NONE;
807 case WPA_CIPHER_WEP40:
808 return CIPHER_WEP40;
809 case WPA_CIPHER_WEP104:
810 return CIPHER_WEP104;
811 case WPA_CIPHER_CCMP:
812 return CIPHER_CCMP;
813 case WPA_CIPHER_TKIP:
814 default:
815 return CIPHER_TKIP;
816 }
817 }
820 enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
821 {
822 switch (key_mgmt) {
823 case WPA_KEY_MGMT_NONE:
824 return KEY_MGMT_NONE;
825 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
826 return KEY_MGMT_802_1X_NO_WPA;
827 case WPA_KEY_MGMT_IEEE8021X:
828 return KEY_MGMT_802_1X;
829 case WPA_KEY_MGMT_WPA_NONE:
830 return KEY_MGMT_WPA_NONE;
831 case WPA_KEY_MGMT_FT_IEEE8021X:
832 return KEY_MGMT_FT_802_1X;
833 case WPA_KEY_MGMT_FT_PSK:
834 return KEY_MGMT_FT_PSK;
835 case WPA_KEY_MGMT_IEEE8021X_SHA256:
836 return KEY_MGMT_802_1X_SHA256;
837 case WPA_KEY_MGMT_PSK_SHA256:
838 return KEY_MGMT_PSK_SHA256;
839 case WPA_KEY_MGMT_WPS:
840 return KEY_MGMT_WPS;
841 case WPA_KEY_MGMT_PSK:
842 default:
843 return KEY_MGMT_PSK;
844 }
845 }
848 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
849 struct wpa_ssid *ssid,
850 struct wpa_ie_data *ie)
851 {
852 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
853 if (ret) {
854 if (ret == -2) {
855 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
856 "from association info");
857 }
858 return -1;
859 }
861 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set "
862 "cipher suites");
863 if (!(ie->group_cipher & ssid->group_cipher)) {
864 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
865 "cipher 0x%x (mask 0x%x) - reject",
866 ie->group_cipher, ssid->group_cipher);
867 return -1;
868 }
869 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
870 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
871 "cipher 0x%x (mask 0x%x) - reject",
872 ie->pairwise_cipher, ssid->pairwise_cipher);
873 return -1;
874 }
875 if (!(ie->key_mgmt & ssid->key_mgmt)) {
876 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
877 "management 0x%x (mask 0x%x) - reject",
878 ie->key_mgmt, ssid->key_mgmt);
879 return -1;
880 }
882 #ifdef CONFIG_IEEE80211W
883 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
884 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
885 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
886 "that does not support management frame protection - "
887 "reject");
888 return -1;
889 }
890 #endif /* CONFIG_IEEE80211W */
892 return 0;
893 }
896 /**
897 * wpa_supplicant_set_suites - Set authentication and encryption parameters
898 * @wpa_s: Pointer to wpa_supplicant data
899 * @bss: Scan results for the selected BSS, or %NULL if not available
900 * @ssid: Configuration data for the selected network
901 * @wpa_ie: Buffer for the WPA/RSN IE
902 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
903 * used buffer length in case the functions returns success.
904 * Returns: 0 on success or -1 on failure
905 *
906 * This function is used to configure authentication and encryption parameters
907 * based on the network configuration and scan result for the selected BSS (if
908 * available).
909 */
910 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
911 struct wpa_bss *bss, struct wpa_ssid *ssid,
912 u8 *wpa_ie, size_t *wpa_ie_len)
913 {
914 struct wpa_ie_data ie;
915 int sel, proto;
916 const u8 *bss_wpa, *bss_rsn;
918 if (bss) {
919 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
920 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
921 } else
922 bss_wpa = bss_rsn = NULL;
924 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
925 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
926 (ie.group_cipher & ssid->group_cipher) &&
927 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
928 (ie.key_mgmt & ssid->key_mgmt)) {
929 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
930 proto = WPA_PROTO_RSN;
931 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
932 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
933 (ie.group_cipher & ssid->group_cipher) &&
934 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
935 (ie.key_mgmt & ssid->key_mgmt)) {
936 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
937 proto = WPA_PROTO_WPA;
938 } else if (bss) {
939 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
940 return -1;
941 } else {
942 if (ssid->proto & WPA_PROTO_RSN)
943 proto = WPA_PROTO_RSN;
944 else
945 proto = WPA_PROTO_WPA;
946 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
947 os_memset(&ie, 0, sizeof(ie));
948 ie.group_cipher = ssid->group_cipher;
949 ie.pairwise_cipher = ssid->pairwise_cipher;
950 ie.key_mgmt = ssid->key_mgmt;
951 #ifdef CONFIG_IEEE80211W
952 ie.mgmt_group_cipher =
953 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
954 WPA_CIPHER_AES_128_CMAC : 0;
955 #endif /* CONFIG_IEEE80211W */
956 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites "
957 "based on configuration");
958 } else
959 proto = ie.proto;
960 }
962 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d "
963 "pairwise %d key_mgmt %d proto %d",
964 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
965 #ifdef CONFIG_IEEE80211W
966 if (ssid->ieee80211w) {
967 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
968 ie.mgmt_group_cipher);
969 }
970 #endif /* CONFIG_IEEE80211W */
972 wpa_s->wpa_proto = proto;
973 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
974 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
975 !!(ssid->proto & WPA_PROTO_RSN));
977 if (bss || !wpa_s->ap_ies_from_associnfo) {
978 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
979 bss_wpa ? 2 + bss_wpa[1] : 0) ||
980 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
981 bss_rsn ? 2 + bss_rsn[1] : 0))
982 return -1;
983 }
985 sel = ie.group_cipher & ssid->group_cipher;
986 if (sel & WPA_CIPHER_CCMP) {
987 wpa_s->group_cipher = WPA_CIPHER_CCMP;
988 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
989 } else if (sel & WPA_CIPHER_TKIP) {
990 wpa_s->group_cipher = WPA_CIPHER_TKIP;
991 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
992 } else if (sel & WPA_CIPHER_WEP104) {
993 wpa_s->group_cipher = WPA_CIPHER_WEP104;
994 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
995 } else if (sel & WPA_CIPHER_WEP40) {
996 wpa_s->group_cipher = WPA_CIPHER_WEP40;
997 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
998 } else {
999 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group "
1000 "cipher");
1001 return -1;
1002 }
1004 sel = ie.pairwise_cipher & ssid->pairwise_cipher;
1005 if (sel & WPA_CIPHER_CCMP) {
1006 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
1007 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
1008 } else if (sel & WPA_CIPHER_TKIP) {
1009 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
1010 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
1011 } else if (sel & WPA_CIPHER_NONE) {
1012 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
1013 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
1014 } else {
1015 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise "
1016 "cipher");
1017 return -1;
1018 }
1020 sel = ie.key_mgmt & ssid->key_mgmt;
1021 if (0) {
1022 #ifdef CONFIG_IEEE80211R
1023 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
1024 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
1025 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
1026 } else if (sel & WPA_KEY_MGMT_FT_PSK) {
1027 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
1028 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
1029 #endif /* CONFIG_IEEE80211R */
1030 #ifdef CONFIG_IEEE80211W
1031 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
1032 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
1033 wpa_dbg(wpa_s, MSG_DEBUG,
1034 "WPA: using KEY_MGMT 802.1X with SHA256");
1035 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
1036 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
1037 wpa_dbg(wpa_s, MSG_DEBUG,
1038 "WPA: using KEY_MGMT PSK with SHA256");
1039 #endif /* CONFIG_IEEE80211W */
1040 } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
1041 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1042 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
1043 } else if (sel & WPA_KEY_MGMT_PSK) {
1044 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
1045 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
1046 } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
1047 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
1048 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
1049 } else {
1050 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select "
1051 "authenticated key management type");
1052 return -1;
1053 }
1055 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
1056 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
1057 wpa_s->pairwise_cipher);
1058 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
1060 #ifdef CONFIG_IEEE80211W
1061 sel = ie.mgmt_group_cipher;
1062 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
1063 !(ie.capabilities & WPA_CAPABILITY_MFPC))
1064 sel = 0;
1065 if (sel & WPA_CIPHER_AES_128_CMAC) {
1066 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1067 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
1068 "AES-128-CMAC");
1069 } else {
1070 wpa_s->mgmt_group_cipher = 0;
1071 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
1072 }
1073 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
1074 wpa_s->mgmt_group_cipher);
1075 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
1076 #endif /* CONFIG_IEEE80211W */
1078 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
1079 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE");
1080 return -1;
1081 }
1083 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt)) {
1084 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1085 #ifndef CONFIG_NO_PBKDF2
1086 if (bss && ssid->bssid_set && ssid->ssid_len == 0 &&
1087 ssid->passphrase) {
1088 u8 psk[PMK_LEN];
1089 pbkdf2_sha1(ssid->passphrase, (char *) bss->ssid,
1090 bss->ssid_len, 4096, psk, PMK_LEN);
1091 wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
1092 psk, PMK_LEN);
1093 wpa_sm_set_pmk(wpa_s->wpa, psk, PMK_LEN);
1094 }
1095 #endif /* CONFIG_NO_PBKDF2 */
1096 } else
1097 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1099 return 0;
1100 }
1103 /**
1104 * wpa_supplicant_associate - Request association
1105 * @wpa_s: Pointer to wpa_supplicant data
1106 * @bss: Scan results for the selected BSS, or %NULL if not available
1107 * @ssid: Configuration data for the selected network
1108 *
1109 * This function is used to request %wpa_supplicant to associate with a BSS.
1110 */
1111 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1112 struct wpa_bss *bss, struct wpa_ssid *ssid)
1113 {
1114 u8 wpa_ie[200];
1115 size_t wpa_ie_len;
1116 int use_crypt, ret, i, bssid_changed;
1117 int algs = WPA_AUTH_ALG_OPEN;
1118 enum wpa_cipher cipher_pairwise, cipher_group;
1119 struct wpa_driver_associate_params params;
1120 int wep_keys_set = 0;
1121 struct wpa_driver_capa capa;
1122 int assoc_failed = 0;
1123 struct wpa_ssid *old_ssid;
1125 #ifdef CONFIG_IBSS_RSN
1126 ibss_rsn_deinit(wpa_s->ibss_rsn);
1127 wpa_s->ibss_rsn = NULL;
1128 #endif /* CONFIG_IBSS_RSN */
1130 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1131 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1132 #ifdef CONFIG_AP
1133 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1134 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1135 "mode");
1136 return;
1137 }
1138 wpa_supplicant_create_ap(wpa_s, ssid);
1139 wpa_s->current_bss = bss;
1140 #else /* CONFIG_AP */
1141 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1142 "the build");
1143 #endif /* CONFIG_AP */
1144 return;
1145 }
1147 #ifdef CONFIG_TDLS
1148 if (bss)
1149 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
1150 bss->ie_len);
1151 #endif /* CONFIG_TDLS */
1153 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1154 ssid->mode == IEEE80211_MODE_INFRA) {
1155 sme_authenticate(wpa_s, bss, ssid);
1156 return;
1157 }
1159 os_memset(¶ms, 0, sizeof(params));
1160 wpa_s->reassociate = 0;
1161 if (bss && !wpas_driver_bss_selection(wpa_s)) {
1162 #ifdef CONFIG_IEEE80211R
1163 const u8 *ie, *md = NULL;
1164 #endif /* CONFIG_IEEE80211R */
1165 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1166 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1167 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1168 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1169 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1170 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1171 if (bssid_changed)
1172 wpas_notify_bssid_changed(wpa_s);
1173 #ifdef CONFIG_IEEE80211R
1174 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1175 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1176 md = ie + 2;
1177 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1178 if (md) {
1179 /* Prepare for the next transition */
1180 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1181 }
1182 #endif /* CONFIG_IEEE80211R */
1183 #ifdef CONFIG_WPS
1184 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1185 wpa_s->conf->ap_scan == 2 &&
1186 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1187 /* Use ap_scan==1 style network selection to find the network
1188 */
1189 wpa_s->scan_req = 2;
1190 wpa_s->reassociate = 1;
1191 wpa_supplicant_req_scan(wpa_s, 0, 0);
1192 return;
1193 #endif /* CONFIG_WPS */
1194 } else {
1195 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1196 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1197 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1198 }
1199 wpa_supplicant_cancel_sched_scan(wpa_s);
1200 wpa_supplicant_cancel_scan(wpa_s);
1202 /* Starting new association, so clear the possibly used WPA IE from the
1203 * previous association. */
1204 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1206 #ifdef IEEE8021X_EAPOL
1207 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1208 if (ssid->leap) {
1209 if (ssid->non_leap == 0)
1210 algs = WPA_AUTH_ALG_LEAP;
1211 else
1212 algs |= WPA_AUTH_ALG_LEAP;
1213 }
1214 }
1215 #endif /* IEEE8021X_EAPOL */
1216 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1217 if (ssid->auth_alg) {
1218 algs = ssid->auth_alg;
1219 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1220 "0x%x", algs);
1221 }
1223 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1224 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1225 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
1226 int try_opportunistic;
1227 try_opportunistic = ssid->proactive_key_caching &&
1228 (ssid->proto & WPA_PROTO_RSN);
1229 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1230 wpa_s->current_ssid,
1231 try_opportunistic) == 0)
1232 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1233 wpa_ie_len = sizeof(wpa_ie);
1234 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1235 wpa_ie, &wpa_ie_len)) {
1236 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1237 "key management and encryption suites");
1238 return;
1239 }
1240 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
1241 wpa_ie_len = sizeof(wpa_ie);
1242 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1243 wpa_ie, &wpa_ie_len)) {
1244 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1245 "key management and encryption suites (no "
1246 "scan results)");
1247 return;
1248 }
1249 #ifdef CONFIG_WPS
1250 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1251 struct wpabuf *wps_ie;
1252 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1253 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1254 wpa_ie_len = wpabuf_len(wps_ie);
1255 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1256 } else
1257 wpa_ie_len = 0;
1258 wpabuf_free(wps_ie);
1259 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1260 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1261 params.wps = WPS_MODE_PRIVACY;
1262 else
1263 params.wps = WPS_MODE_OPEN;
1264 wpa_s->wpa_proto = 0;
1265 #endif /* CONFIG_WPS */
1266 } else {
1267 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1268 wpa_ie_len = 0;
1269 wpa_s->wpa_proto = 0;
1270 }
1272 #ifdef CONFIG_P2P
1273 if (wpa_s->global->p2p) {
1274 u8 *pos;
1275 size_t len;
1276 int res;
1277 int p2p_group;
1278 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1279 pos = wpa_ie + wpa_ie_len;
1280 len = sizeof(wpa_ie) - wpa_ie_len;
1281 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1282 if (res >= 0)
1283 wpa_ie_len += res;
1284 }
1286 wpa_s->cross_connect_disallowed = 0;
1287 if (bss) {
1288 struct wpabuf *p2p;
1289 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1290 if (p2p) {
1291 wpa_s->cross_connect_disallowed =
1292 p2p_get_cross_connect_disallowed(p2p);
1293 wpabuf_free(p2p);
1294 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1295 "connection",
1296 wpa_s->cross_connect_disallowed ?
1297 "disallows" : "allows");
1298 }
1299 }
1300 #endif /* CONFIG_P2P */
1302 #ifdef CONFIG_INTERWORKING
1303 if (wpa_s->conf->interworking) {
1304 u8 *pos = wpa_ie;
1305 if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN)
1306 pos += 2 + pos[1];
1307 os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie));
1308 wpa_ie_len += 6;
1309 *pos++ = WLAN_EID_EXT_CAPAB;
1310 *pos++ = 4;
1311 *pos++ = 0x00;
1312 *pos++ = 0x00;
1313 *pos++ = 0x00;
1314 *pos++ = 0x80; /* Bit 31 - Interworking */
1315 }
1316 #endif /* CONFIG_INTERWORKING */
1318 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1319 use_crypt = 1;
1320 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1321 cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1322 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1323 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1324 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1325 use_crypt = 0;
1326 if (wpa_set_wep_keys(wpa_s, ssid)) {
1327 use_crypt = 1;
1328 wep_keys_set = 1;
1329 }
1330 }
1331 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1332 use_crypt = 0;
1334 #ifdef IEEE8021X_EAPOL
1335 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1336 if ((ssid->eapol_flags &
1337 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1338 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1339 !wep_keys_set) {
1340 use_crypt = 0;
1341 } else {
1342 /* Assume that dynamic WEP-104 keys will be used and
1343 * set cipher suites in order for drivers to expect
1344 * encryption. */
1345 cipher_pairwise = cipher_group = CIPHER_WEP104;
1346 }
1347 }
1348 #endif /* IEEE8021X_EAPOL */
1350 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1351 /* Set the key before (and later after) association */
1352 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1353 }
1355 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1356 if (bss) {
1357 params.ssid = bss->ssid;
1358 params.ssid_len = bss->ssid_len;
1359 if (!wpas_driver_bss_selection(wpa_s)) {
1360 params.bssid = bss->bssid;
1361 params.freq = bss->freq;
1362 }
1363 } else {
1364 params.ssid = ssid->ssid;
1365 params.ssid_len = ssid->ssid_len;
1366 }
1368 if (ssid->mode == WPAS_MODE_IBSS && ssid->bssid_set &&
1369 wpa_s->conf->ap_scan == 2) {
1370 params.bssid = ssid->bssid;
1371 params.fixed_bssid = 1;
1372 }
1374 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1375 params.freq == 0)
1376 params.freq = ssid->frequency; /* Initial channel for IBSS */
1377 params.wpa_ie = wpa_ie;
1378 params.wpa_ie_len = wpa_ie_len;
1379 params.pairwise_suite = cipher_pairwise;
1380 params.group_suite = cipher_group;
1381 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1382 params.wpa_proto = wpa_s->wpa_proto;
1383 params.auth_alg = algs;
1384 params.mode = ssid->mode;
1385 for (i = 0; i < NUM_WEP_KEYS; i++) {
1386 if (ssid->wep_key_len[i])
1387 params.wep_key[i] = ssid->wep_key[i];
1388 params.wep_key_len[i] = ssid->wep_key_len[i];
1389 }
1390 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1392 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1393 (params.key_mgmt_suite == KEY_MGMT_PSK ||
1394 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1395 params.passphrase = ssid->passphrase;
1396 if (ssid->psk_set)
1397 params.psk = ssid->psk;
1398 }
1400 params.drop_unencrypted = use_crypt;
1402 #ifdef CONFIG_IEEE80211W
1403 params.mgmt_frame_protection = ssid->ieee80211w;
1404 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1405 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1406 struct wpa_ie_data ie;
1407 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1408 ie.capabilities &
1409 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1410 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1411 "MFP: require MFP");
1412 params.mgmt_frame_protection =
1413 MGMT_FRAME_PROTECTION_REQUIRED;
1414 }
1415 }
1416 #endif /* CONFIG_IEEE80211W */
1418 params.p2p = ssid->p2p_group;
1420 if (wpa_s->parent->set_sta_uapsd)
1421 params.uapsd = wpa_s->parent->sta_uapsd;
1422 else
1423 params.uapsd = -1;
1425 ret = wpa_drv_associate(wpa_s, ¶ms);
1426 if (ret < 0) {
1427 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1428 "failed");
1429 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1430 /*
1431 * The driver is known to mean what is saying, so we
1432 * can stop right here; the association will not
1433 * succeed.
1434 */
1435 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1436 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1437 return;
1438 }
1439 /* try to continue anyway; new association will be tried again
1440 * after timeout */
1441 assoc_failed = 1;
1442 }
1444 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1445 /* Set the key after the association just in case association
1446 * cleared the previously configured key. */
1447 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1448 /* No need to timeout authentication since there is no key
1449 * management. */
1450 wpa_supplicant_cancel_auth_timeout(wpa_s);
1451 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1452 #ifdef CONFIG_IBSS_RSN
1453 } else if (ssid->mode == WPAS_MODE_IBSS &&
1454 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1455 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1456 /*
1457 * RSN IBSS authentication is per-STA and we can disable the
1458 * per-BSSID authentication.
1459 */
1460 wpa_supplicant_cancel_auth_timeout(wpa_s);
1461 #endif /* CONFIG_IBSS_RSN */
1462 } else {
1463 /* Timeout for IEEE 802.11 authentication and association */
1464 int timeout = 60;
1466 if (assoc_failed) {
1467 /* give IBSS a bit more time */
1468 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1469 } else if (wpa_s->conf->ap_scan == 1) {
1470 /* give IBSS a bit more time */
1471 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1472 }
1473 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1474 }
1476 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1477 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1478 /* Set static WEP keys again */
1479 wpa_set_wep_keys(wpa_s, ssid);
1480 }
1482 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1483 /*
1484 * Do not allow EAP session resumption between different
1485 * network configurations.
1486 */
1487 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1488 }
1489 old_ssid = wpa_s->current_ssid;
1490 wpa_s->current_ssid = ssid;
1491 wpa_s->current_bss = bss;
1492 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1493 wpa_supplicant_initiate_eapol(wpa_s);
1494 if (old_ssid != wpa_s->current_ssid)
1495 wpas_notify_network_changed(wpa_s);
1496 }
1499 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1500 const u8 *addr)
1501 {
1502 struct wpa_ssid *old_ssid;
1504 wpa_clear_keys(wpa_s, addr);
1505 wpa_supplicant_mark_disassoc(wpa_s);
1506 old_ssid = wpa_s->current_ssid;
1507 wpa_s->current_ssid = NULL;
1508 wpa_s->current_bss = NULL;
1509 wpa_sm_set_config(wpa_s->wpa, NULL);
1510 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1511 if (old_ssid != wpa_s->current_ssid)
1512 wpas_notify_network_changed(wpa_s);
1513 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1514 }
1517 /**
1518 * wpa_supplicant_disassociate - Disassociate the current connection
1519 * @wpa_s: Pointer to wpa_supplicant data
1520 * @reason_code: IEEE 802.11 reason code for the disassociate frame
1521 *
1522 * This function is used to request %wpa_supplicant to disassociate with the
1523 * current AP.
1524 */
1525 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1526 int reason_code)
1527 {
1528 u8 *addr = NULL;
1530 if (!is_zero_ether_addr(wpa_s->bssid)) {
1531 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1532 addr = wpa_s->bssid;
1533 }
1535 wpa_supplicant_clear_connection(wpa_s, addr);
1536 }
1539 /**
1540 * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1541 * @wpa_s: Pointer to wpa_supplicant data
1542 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1543 *
1544 * This function is used to request %wpa_supplicant to deauthenticate from the
1545 * current AP.
1546 */
1547 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1548 int reason_code)
1549 {
1550 u8 *addr = NULL;
1552 if (!is_zero_ether_addr(wpa_s->bssid)) {
1553 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, reason_code);
1554 addr = wpa_s->bssid;
1555 }
1557 wpa_supplicant_clear_connection(wpa_s, addr);
1558 }
1561 /**
1562 * wpa_supplicant_enable_network - Mark a configured network as enabled
1563 * @wpa_s: wpa_supplicant structure for a network interface
1564 * @ssid: wpa_ssid structure for a configured network or %NULL
1565 *
1566 * Enables the specified network or all networks if no network specified.
1567 */
1568 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1569 struct wpa_ssid *ssid)
1570 {
1571 struct wpa_ssid *other_ssid;
1572 int was_disabled;
1574 if (ssid == NULL) {
1575 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1576 other_ssid = other_ssid->next) {
1577 if (other_ssid->disabled == 2)
1578 continue; /* do not change persistent P2P group
1579 * data */
1580 if (other_ssid == wpa_s->current_ssid &&
1581 other_ssid->disabled)
1582 wpa_s->reassociate = 1;
1584 was_disabled = other_ssid->disabled;
1586 other_ssid->disabled = 0;
1588 if (was_disabled != other_ssid->disabled)
1589 wpas_notify_network_enabled_changed(
1590 wpa_s, other_ssid);
1591 }
1592 if (wpa_s->reassociate)
1593 wpa_supplicant_req_scan(wpa_s, 0, 0);
1594 } else if (ssid->disabled && ssid->disabled != 2) {
1595 if (wpa_s->current_ssid == NULL) {
1596 /*
1597 * Try to reassociate since there is no current
1598 * configuration and a new network was made available.
1599 */
1600 wpa_s->reassociate = 1;
1601 wpa_supplicant_req_scan(wpa_s, 0, 0);
1602 }
1604 was_disabled = ssid->disabled;
1606 ssid->disabled = 0;
1608 if (was_disabled != ssid->disabled)
1609 wpas_notify_network_enabled_changed(wpa_s, ssid);
1610 }
1611 }
1614 /**
1615 * wpa_supplicant_disable_network - Mark a configured network as disabled
1616 * @wpa_s: wpa_supplicant structure for a network interface
1617 * @ssid: wpa_ssid structure for a configured network or %NULL
1618 *
1619 * Disables the specified network or all networks if no network specified.
1620 */
1621 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1622 struct wpa_ssid *ssid)
1623 {
1624 struct wpa_ssid *other_ssid;
1625 int was_disabled;
1627 if (ssid == NULL) {
1628 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1629 other_ssid = other_ssid->next) {
1630 was_disabled = other_ssid->disabled;
1631 if (was_disabled == 2)
1632 continue; /* do not change persistent P2P group
1633 * data */
1635 other_ssid->disabled = 1;
1637 if (was_disabled != other_ssid->disabled)
1638 wpas_notify_network_enabled_changed(
1639 wpa_s, other_ssid);
1640 }
1641 if (wpa_s->current_ssid)
1642 wpa_supplicant_disassociate(
1643 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1644 } else if (ssid->disabled != 2) {
1645 if (ssid == wpa_s->current_ssid)
1646 wpa_supplicant_disassociate(
1647 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1649 was_disabled = ssid->disabled;
1651 ssid->disabled = 1;
1653 if (was_disabled != ssid->disabled)
1654 wpas_notify_network_enabled_changed(wpa_s, ssid);
1655 }
1656 }
1659 /**
1660 * wpa_supplicant_select_network - Attempt association with a network
1661 * @wpa_s: wpa_supplicant structure for a network interface
1662 * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1663 */
1664 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1665 struct wpa_ssid *ssid)
1666 {
1668 struct wpa_ssid *other_ssid;
1670 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1671 wpa_supplicant_disassociate(
1672 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1674 /*
1675 * Mark all other networks disabled or mark all networks enabled if no
1676 * network specified.
1677 */
1678 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1679 other_ssid = other_ssid->next) {
1680 int was_disabled = other_ssid->disabled;
1681 if (was_disabled == 2)
1682 continue; /* do not change persistent P2P group data */
1684 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1686 if (was_disabled != other_ssid->disabled)
1687 wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1688 }
1690 if (ssid && ssid == wpa_s->current_ssid && wpa_s->current_ssid) {
1691 /* We are already associated with the selected network */
1692 wpa_printf(MSG_DEBUG, "Already associated with the "
1693 "selected network - do nothing");
1694 return;
1695 }
1697 wpa_s->connect_without_scan = NULL;
1698 wpa_s->disconnected = 0;
1699 wpa_s->reassociate = 1;
1700 wpa_supplicant_req_scan(wpa_s, 0, 0);
1702 if (ssid)
1703 wpas_notify_network_selected(wpa_s, ssid);
1704 }
1707 /**
1708 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1709 * @wpa_s: wpa_supplicant structure for a network interface
1710 * @ap_scan: AP scan mode
1711 * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1712 *
1713 */
1714 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1715 {
1717 int old_ap_scan;
1719 if (ap_scan < 0 || ap_scan > 2)
1720 return -1;
1722 #ifdef ANDROID
1723 if (ap_scan == 2 && ap_scan != wpa_s->conf->ap_scan &&
1724 wpa_s->wpa_state >= WPA_ASSOCIATING &&
1725 wpa_s->wpa_state < WPA_COMPLETED) {
1726 wpa_printf(MSG_ERROR, "ap_scan = %d (%d) rejected while "
1727 "associating", wpa_s->conf->ap_scan, ap_scan);
1728 return 0;
1729 }
1730 #endif /* ANDROID */
1732 old_ap_scan = wpa_s->conf->ap_scan;
1733 wpa_s->conf->ap_scan = ap_scan;
1735 if (old_ap_scan != wpa_s->conf->ap_scan)
1736 wpas_notify_ap_scan_changed(wpa_s);
1738 return 0;
1739 }
1742 /**
1743 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age
1744 * @wpa_s: wpa_supplicant structure for a network interface
1745 * @expire_age: Expiration age in seconds
1746 * Returns: 0 if succeed or -1 if expire_age has an invalid value
1747 *
1748 */
1749 int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
1750 unsigned int bss_expire_age)
1751 {
1752 if (bss_expire_age < 10) {
1753 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u",
1754 bss_expire_age);
1755 return -1;
1756 }
1757 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec",
1758 bss_expire_age);
1759 wpa_s->conf->bss_expiration_age = bss_expire_age;
1761 return 0;
1762 }
1765 /**
1766 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count
1767 * @wpa_s: wpa_supplicant structure for a network interface
1768 * @expire_count: number of scans after which an unseen BSS is reclaimed
1769 * Returns: 0 if succeed or -1 if expire_count has an invalid value
1770 *
1771 */
1772 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
1773 unsigned int bss_expire_count)
1774 {
1775 if (bss_expire_count < 1) {
1776 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u",
1777 bss_expire_count);
1778 return -1;
1779 }
1780 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u",
1781 bss_expire_count);
1782 wpa_s->conf->bss_expiration_scan_count = bss_expire_count;
1784 return 0;
1785 }
1788 /**
1789 * wpa_supplicant_set_debug_params - Set global debug params
1790 * @global: wpa_global structure
1791 * @debug_level: debug level
1792 * @debug_timestamp: determines if show timestamp in debug data
1793 * @debug_show_keys: determines if show keys in debug data
1794 * Returns: 0 if succeed or -1 if debug_level has wrong value
1795 */
1796 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1797 int debug_timestamp, int debug_show_keys)
1798 {
1800 int old_level, old_timestamp, old_show_keys;
1802 /* check for allowed debuglevels */
1803 if (debug_level != MSG_EXCESSIVE &&
1804 debug_level != MSG_MSGDUMP &&
1805 debug_level != MSG_DEBUG &&
1806 debug_level != MSG_INFO &&
1807 debug_level != MSG_WARNING &&
1808 debug_level != MSG_ERROR)
1809 return -1;
1811 old_level = wpa_debug_level;
1812 old_timestamp = wpa_debug_timestamp;
1813 old_show_keys = wpa_debug_show_keys;
1815 wpa_debug_level = debug_level;
1816 wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1817 wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1819 if (wpa_debug_level != old_level)
1820 wpas_notify_debug_level_changed(global);
1821 if (wpa_debug_timestamp != old_timestamp)
1822 wpas_notify_debug_timestamp_changed(global);
1823 if (wpa_debug_show_keys != old_show_keys)
1824 wpas_notify_debug_show_keys_changed(global);
1826 return 0;
1827 }
1830 /**
1831 * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1832 * @wpa_s: Pointer to wpa_supplicant data
1833 * Returns: A pointer to the current network structure or %NULL on failure
1834 */
1835 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1836 {
1837 struct wpa_ssid *entry;
1838 u8 ssid[MAX_SSID_LEN];
1839 int res;
1840 size_t ssid_len;
1841 u8 bssid[ETH_ALEN];
1842 int wired;
1844 res = wpa_drv_get_ssid(wpa_s, ssid);
1845 if (res < 0) {
1846 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1847 "driver");
1848 return NULL;
1849 }
1850 ssid_len = res;
1852 if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1853 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1854 "driver");
1855 return NULL;
1856 }
1858 wired = wpa_s->conf->ap_scan == 0 &&
1859 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1861 entry = wpa_s->conf->ssid;
1862 while (entry) {
1863 if (!entry->disabled &&
1864 ((ssid_len == entry->ssid_len &&
1865 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1866 (!entry->bssid_set ||
1867 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1868 return entry;
1869 #ifdef CONFIG_WPS
1870 if (!entry->disabled &&
1871 (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1872 (entry->ssid == NULL || entry->ssid_len == 0) &&
1873 (!entry->bssid_set ||
1874 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1875 return entry;
1876 #endif /* CONFIG_WPS */
1878 if (!entry->disabled && entry->bssid_set &&
1879 entry->ssid_len == 0 &&
1880 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)
1881 return entry;
1883 entry = entry->next;
1884 }
1886 return NULL;
1887 }
1890 static int select_driver(struct wpa_supplicant *wpa_s, int i)
1891 {
1892 struct wpa_global *global = wpa_s->global;
1894 if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) {
1895 global->drv_priv[i] = wpa_drivers[i]->global_init();
1896 if (global->drv_priv[i] == NULL) {
1897 wpa_printf(MSG_ERROR, "Failed to initialize driver "
1898 "'%s'", wpa_drivers[i]->name);
1899 return -1;
1900 }
1901 }
1903 wpa_s->driver = wpa_drivers[i];
1904 wpa_s->global_drv_priv = global->drv_priv[i];
1906 return 0;
1907 }
1910 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1911 const char *name)
1912 {
1913 int i;
1914 size_t len;
1915 const char *pos, *driver = name;
1917 if (wpa_s == NULL)
1918 return -1;
1920 if (wpa_drivers[0] == NULL) {
1921 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1922 "wpa_supplicant");
1923 return -1;
1924 }
1926 if (name == NULL) {
1927 /* default to first driver in the list */
1928 return select_driver(wpa_s, 0);
1929 }
1931 do {
1932 pos = os_strchr(driver, ',');
1933 if (pos)
1934 len = pos - driver;
1935 else
1936 len = os_strlen(driver);
1938 for (i = 0; wpa_drivers[i]; i++) {
1939 if (os_strlen(wpa_drivers[i]->name) == len &&
1940 os_strncmp(driver, wpa_drivers[i]->name, len) ==
1941 0)
1942 return select_driver(wpa_s, i);
1943 }
1945 driver = pos + 1;
1946 } while (pos);
1948 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1949 return -1;
1950 }
1953 /**
1954 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1955 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1956 * with struct wpa_driver_ops::init()
1957 * @src_addr: Source address of the EAPOL frame
1958 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1959 * @len: Length of the EAPOL data
1960 *
1961 * This function is called for each received EAPOL frame. Most driver
1962 * interfaces rely on more generic OS mechanism for receiving frames through
1963 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1964 * take care of received EAPOL frames and deliver them to the core supplicant
1965 * code by calling this function.
1966 */
1967 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1968 const u8 *buf, size_t len)
1969 {
1970 struct wpa_supplicant *wpa_s = ctx;
1972 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1973 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1975 if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1976 /*
1977 * There is possible race condition between receiving the
1978 * association event and the EAPOL frame since they are coming
1979 * through different paths from the driver. In order to avoid
1980 * issues in trying to process the EAPOL frame before receiving
1981 * association information, lets queue it for processing until
1982 * the association event is received.
1983 */
1984 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
1985 "of received EAPOL frame");
1986 wpabuf_free(wpa_s->pending_eapol_rx);
1987 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1988 if (wpa_s->pending_eapol_rx) {
1989 os_get_time(&wpa_s->pending_eapol_rx_time);
1990 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1991 ETH_ALEN);
1992 }
1993 return;
1994 }
1996 #ifdef CONFIG_AP
1997 if (wpa_s->ap_iface) {
1998 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1999 return;
2000 }
2001 #endif /* CONFIG_AP */
2003 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
2004 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
2005 "no key management is configured");
2006 return;
2007 }
2009 if (wpa_s->eapol_received == 0 &&
2010 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
2011 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
2012 wpa_s->wpa_state != WPA_COMPLETED) &&
2013 (wpa_s->current_ssid == NULL ||
2014 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
2015 /* Timeout for completing IEEE 802.1X and WPA authentication */
2016 wpa_supplicant_req_auth_timeout(
2017 wpa_s,
2018 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
2019 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
2020 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
2021 70 : 10, 0);
2022 }
2023 wpa_s->eapol_received++;
2025 if (wpa_s->countermeasures) {
2026 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
2027 "EAPOL packet");
2028 return;
2029 }
2031 #ifdef CONFIG_IBSS_RSN
2032 if (wpa_s->current_ssid &&
2033 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
2034 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
2035 return;
2036 }
2037 #endif /* CONFIG_IBSS_RSN */
2039 /* Source address of the incoming EAPOL frame could be compared to the
2040 * current BSSID. However, it is possible that a centralized
2041 * Authenticator could be using another MAC address than the BSSID of
2042 * an AP, so just allow any address to be used for now. The replies are
2043 * still sent to the current BSSID (if available), though. */
2045 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
2046 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
2047 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
2048 return;
2049 wpa_drv_poll(wpa_s);
2050 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
2051 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
2052 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
2053 /*
2054 * Set portValid = TRUE here since we are going to skip 4-way
2055 * handshake processing which would normally set portValid. We
2056 * need this to allow the EAPOL state machines to be completed
2057 * without going through EAPOL-Key handshake.
2058 */
2059 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
2060 }
2061 }
2064 int wpa_supplicant_update_mac_addr(struct wpa_supplicant *wpa_s)
2065 {
2066 if (wpa_s->driver->send_eapol) {
2067 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2068 if (addr)
2069 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2070 } else if (!(wpa_s->drv_flags &
2071 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
2072 l2_packet_deinit(wpa_s->l2);
2073 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
2074 wpa_drv_get_mac_addr(wpa_s),
2075 ETH_P_EAPOL,
2076 wpa_supplicant_rx_eapol, wpa_s, 0);
2077 if (wpa_s->l2 == NULL)
2078 return -1;
2079 } else {
2080 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2081 if (addr)
2082 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2083 }
2085 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
2086 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
2087 return -1;
2088 }
2090 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
2091 MAC2STR(wpa_s->own_addr));
2092 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2094 return 0;
2095 }
2098 /**
2099 * wpa_supplicant_driver_init - Initialize driver interface parameters
2100 * @wpa_s: Pointer to wpa_supplicant data
2101 * Returns: 0 on success, -1 on failure
2102 *
2103 * This function is called to initialize driver interface parameters.
2104 * wpa_drv_init() must have been called before this function to initialize the
2105 * driver interface.
2106 */
2107 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
2108 {
2109 static int interface_count = 0;
2111 if (wpa_supplicant_update_mac_addr(wpa_s) < 0)
2112 return -1;
2114 if (wpa_s->bridge_ifname[0]) {
2115 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
2116 "interface '%s'", wpa_s->bridge_ifname);
2117 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
2118 wpa_s->own_addr,
2119 ETH_P_EAPOL,
2120 wpa_supplicant_rx_eapol, wpa_s,
2121 0);
2122 if (wpa_s->l2_br == NULL) {
2123 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
2124 "connection for the bridge interface '%s'",
2125 wpa_s->bridge_ifname);
2126 return -1;
2127 }
2128 }
2130 wpa_clear_keys(wpa_s, NULL);
2132 /* Make sure that TKIP countermeasures are not left enabled (could
2133 * happen if wpa_supplicant is killed during countermeasures. */
2134 wpa_drv_set_countermeasures(wpa_s, 0);
2136 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
2137 wpa_drv_flush_pmkid(wpa_s);
2139 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
2140 wpa_s->prev_scan_wildcard = 0;
2142 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
2143 if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count,
2144 100000))
2145 wpa_supplicant_req_scan(wpa_s, interface_count,
2146 100000);
2147 interface_count++;
2148 } else
2149 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
2151 return 0;
2152 }
2155 static int wpa_supplicant_daemon(const char *pid_file)
2156 {
2157 wpa_printf(MSG_DEBUG, "Daemonize..");
2158 return os_daemonize(pid_file);
2159 }
2162 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2163 {
2164 struct wpa_supplicant *wpa_s;
2166 wpa_s = os_zalloc(sizeof(*wpa_s));
2167 if (wpa_s == NULL)
2168 return NULL;
2169 wpa_s->scan_req = 1;
2170 wpa_s->scan_interval = 5;
2171 wpa_s->new_connection = 1;
2172 wpa_s->parent = wpa_s;
2173 wpa_s->sched_scanning = 0;
2175 return wpa_s;
2176 }
2179 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2180 struct wpa_interface *iface)
2181 {
2182 const char *ifname, *driver;
2183 struct wpa_driver_capa capa;
2185 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2186 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2187 iface->confname ? iface->confname : "N/A",
2188 iface->driver ? iface->driver : "default",
2189 iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2190 iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2192 if (iface->confname) {
2193 #ifdef CONFIG_BACKEND_FILE
2194 wpa_s->confname = os_rel2abs_path(iface->confname);
2195 if (wpa_s->confname == NULL) {
2196 wpa_printf(MSG_ERROR, "Failed to get absolute path "
2197 "for configuration file '%s'.",
2198 iface->confname);
2199 return -1;
2200 }
2201 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2202 iface->confname, wpa_s->confname);
2203 #else /* CONFIG_BACKEND_FILE */
2204 wpa_s->confname = os_strdup(iface->confname);
2205 #endif /* CONFIG_BACKEND_FILE */
2206 wpa_s->conf = wpa_config_read(wpa_s->confname);
2207 if (wpa_s->conf == NULL) {
2208 wpa_printf(MSG_ERROR, "Failed to read or parse "
2209 "configuration '%s'.", wpa_s->confname);
2210 return -1;
2211 }
2213 /*
2214 * Override ctrl_interface and driver_param if set on command
2215 * line.
2216 */
2217 if (iface->ctrl_interface) {
2218 os_free(wpa_s->conf->ctrl_interface);
2219 wpa_s->conf->ctrl_interface =
2220 os_strdup(iface->ctrl_interface);
2221 }
2223 if (iface->driver_param) {
2224 os_free(wpa_s->conf->driver_param);
2225 wpa_s->conf->driver_param =
2226 os_strdup(iface->driver_param);
2227 }
2228 } else
2229 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2230 iface->driver_param);
2232 if (wpa_s->conf == NULL) {
2233 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2234 return -1;
2235 }
2237 if (iface->ifname == NULL) {
2238 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2239 return -1;
2240 }
2241 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2242 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2243 iface->ifname);
2244 return -1;
2245 }
2246 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2248 if (iface->bridge_ifname) {
2249 if (os_strlen(iface->bridge_ifname) >=
2250 sizeof(wpa_s->bridge_ifname)) {
2251 wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2252 "name '%s'.", iface->bridge_ifname);
2253 return -1;
2254 }
2255 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2256 sizeof(wpa_s->bridge_ifname));
2257 }
2259 /* RSNA Supplicant Key Management - INITIALIZE */
2260 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2261 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2263 /* Initialize driver interface and register driver event handler before
2264 * L2 receive handler so that association events are processed before
2265 * EAPOL-Key packets if both become available for the same select()
2266 * call. */
2267 driver = iface->driver;
2268 next_driver:
2269 if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2270 return -1;
2272 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2273 if (wpa_s->drv_priv == NULL) {
2274 const char *pos;
2275 pos = driver ? os_strchr(driver, ',') : NULL;
2276 if (pos) {
2277 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2278 "driver interface - try next driver wrapper");
2279 driver = pos + 1;
2280 goto next_driver;
2281 }
2282 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2283 "interface");
2284 return -1;
2285 }
2286 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2287 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2288 "driver_param '%s'", wpa_s->conf->driver_param);
2289 return -1;
2290 }
2292 ifname = wpa_drv_get_ifname(wpa_s);
2293 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2294 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2295 "interface name with '%s'", ifname);
2296 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2297 }
2299 if (wpa_supplicant_init_wpa(wpa_s) < 0)
2300 return -1;
2302 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2303 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2304 NULL);
2305 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2307 if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2308 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2309 wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2310 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2311 "dot11RSNAConfigPMKLifetime");
2312 return -1;
2313 }
2315 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2316 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2317 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2318 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2319 "dot11RSNAConfigPMKReauthThreshold");
2320 return -1;
2321 }
2323 if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2324 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2325 wpa_s->conf->dot11RSNAConfigSATimeout)) {
2326 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2327 "dot11RSNAConfigSATimeout");
2328 return -1;
2329 }
2331 wpa_s->hw.modes = wpa_drv_get_hw_feature_data(wpa_s,
2332 &wpa_s->hw.num_modes,
2333 &wpa_s->hw.flags);
2335 if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2336 wpa_s->drv_capa_known = 1;
2337 wpa_s->drv_flags = capa.flags;
2338 wpa_s->probe_resp_offloads = capa.probe_resp_offloads;
2339 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2340 wpa_s->max_sched_scan_ssids = capa.max_sched_scan_ssids;
2341 wpa_s->sched_scan_supported = capa.sched_scan_supported;
2342 wpa_s->max_match_sets = capa.max_match_sets;
2343 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2344 wpa_s->max_stations = capa.max_stations;
2345 }
2346 if (wpa_s->max_remain_on_chan == 0)
2347 wpa_s->max_remain_on_chan = 1000;
2349 if (wpa_supplicant_driver_init(wpa_s) < 0)
2350 return -1;
2352 #ifdef CONFIG_TDLS
2353 if (wpa_tdls_init(wpa_s->wpa))
2354 return -1;
2355 #endif /* CONFIG_TDLS */
2357 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2358 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2359 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2360 return -1;
2361 }
2363 if (wpas_wps_init(wpa_s))
2364 return -1;
2366 if (wpa_supplicant_init_eapol(wpa_s) < 0)
2367 return -1;
2368 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2370 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2371 if (wpa_s->ctrl_iface == NULL) {
2372 wpa_printf(MSG_ERROR,
2373 "Failed to initialize control interface '%s'.\n"
2374 "You may have another wpa_supplicant process "
2375 "already running or the file was\n"
2376 "left by an unclean termination of wpa_supplicant "
2377 "in which case you will need\n"
2378 "to manually remove this file before starting "
2379 "wpa_supplicant again.\n",
2380 wpa_s->conf->ctrl_interface);
2381 return -1;
2382 }
2384 wpa_s->gas = gas_query_init(wpa_s);
2385 if (wpa_s->gas == NULL) {
2386 wpa_printf(MSG_ERROR, "Failed to initialize GAS query");
2387 return -1;
2388 }
2390 #ifdef CONFIG_P2P
2391 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2392 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2393 return -1;
2394 }
2395 #endif /* CONFIG_P2P */
2397 if (wpa_bss_init(wpa_s) < 0)
2398 return -1;
2400 return 0;
2401 }
2404 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2405 int notify, int terminate)
2406 {
2407 if (wpa_s->drv_priv) {
2408 wpa_supplicant_deauthenticate(wpa_s,
2409 WLAN_REASON_DEAUTH_LEAVING);
2411 wpa_drv_set_countermeasures(wpa_s, 0);
2412 wpa_clear_keys(wpa_s, NULL);
2413 }
2415 wpa_supplicant_cleanup(wpa_s);
2417 if (notify)
2418 wpas_notify_iface_removed(wpa_s);
2420 if (wpa_s->drv_priv)
2421 wpa_drv_deinit(wpa_s);
2422 }
2425 /**
2426 * wpa_supplicant_add_iface - Add a new network interface
2427 * @global: Pointer to global data from wpa_supplicant_init()
2428 * @iface: Interface configuration options
2429 * Returns: Pointer to the created interface or %NULL on failure
2430 *
2431 * This function is used to add new network interfaces for %wpa_supplicant.
2432 * This can be called before wpa_supplicant_run() to add interfaces before the
2433 * main event loop has been started. In addition, new interfaces can be added
2434 * dynamically while %wpa_supplicant is already running. This could happen,
2435 * e.g., when a hotplug network adapter is inserted.
2436 */
2437 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2438 struct wpa_interface *iface)
2439 {
2440 struct wpa_supplicant *wpa_s;
2441 struct wpa_interface t_iface;
2442 struct wpa_ssid *ssid;
2444 if (global == NULL || iface == NULL)
2445 return NULL;
2447 wpa_s = wpa_supplicant_alloc();
2448 if (wpa_s == NULL)
2449 return NULL;
2451 wpa_s->global = global;
2453 t_iface = *iface;
2454 if (global->params.override_driver) {
2455 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2456 "('%s' -> '%s')",
2457 iface->driver, global->params.override_driver);
2458 t_iface.driver = global->params.override_driver;
2459 }
2460 if (global->params.override_ctrl_interface) {
2461 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2462 "ctrl_interface ('%s' -> '%s')",
2463 iface->ctrl_interface,
2464 global->params.override_ctrl_interface);
2465 t_iface.ctrl_interface =
2466 global->params.override_ctrl_interface;
2467 }
2468 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2469 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2470 iface->ifname);
2471 wpa_supplicant_deinit_iface(wpa_s, 0, 0);
2472 os_free(wpa_s);
2473 return NULL;
2474 }
2476 /* Notify the control interfaces about new iface */
2477 if (wpas_notify_iface_added(wpa_s)) {
2478 wpa_supplicant_deinit_iface(wpa_s, 1, 0);
2479 os_free(wpa_s);
2480 return NULL;
2481 }
2483 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2484 wpas_notify_network_added(wpa_s, ssid);
2486 wpa_s->next = global->ifaces;
2487 global->ifaces = wpa_s;
2489 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2491 return wpa_s;
2492 }
2495 /**
2496 * wpa_supplicant_remove_iface - Remove a network interface
2497 * @global: Pointer to global data from wpa_supplicant_init()
2498 * @wpa_s: Pointer to the network interface to be removed
2499 * Returns: 0 if interface was removed, -1 if interface was not found
2500 *
2501 * This function can be used to dynamically remove network interfaces from
2502 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2503 * addition, this function is used to remove all remaining interfaces when
2504 * %wpa_supplicant is terminated.
2505 */
2506 int wpa_supplicant_remove_iface(struct wpa_global *global,
2507 struct wpa_supplicant *wpa_s,
2508 int terminate)
2509 {
2510 struct wpa_supplicant *prev;
2512 /* Remove interface from the global list of interfaces */
2513 prev = global->ifaces;
2514 if (prev == wpa_s) {
2515 global->ifaces = wpa_s->next;
2516 } else {
2517 while (prev && prev->next != wpa_s)
2518 prev = prev->next;
2519 if (prev == NULL)
2520 return -1;
2521 prev->next = wpa_s->next;
2522 }
2524 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2526 if (global->p2p_group_formation == wpa_s)
2527 global->p2p_group_formation = NULL;
2528 wpa_supplicant_deinit_iface(wpa_s, 1, terminate);
2529 os_free(wpa_s);
2531 return 0;
2532 }
2535 /**
2536 * wpa_supplicant_get_eap_mode - Get the current EAP mode
2537 * @wpa_s: Pointer to the network interface
2538 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2539 */
2540 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2541 {
2542 const char *eapol_method;
2544 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2545 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2546 return "NO-EAP";
2547 }
2549 eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2550 if (eapol_method == NULL)
2551 return "UNKNOWN-EAP";
2553 return eapol_method;
2554 }
2557 /**
2558 * wpa_supplicant_get_iface - Get a new network interface
2559 * @global: Pointer to global data from wpa_supplicant_init()
2560 * @ifname: Interface name
2561 * Returns: Pointer to the interface or %NULL if not found
2562 */
2563 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2564 const char *ifname)
2565 {
2566 struct wpa_supplicant *wpa_s;
2568 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2569 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2570 return wpa_s;
2571 }
2572 return NULL;
2573 }
2576 #ifndef CONFIG_NO_WPA_MSG
2577 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2578 {
2579 struct wpa_supplicant *wpa_s = ctx;
2580 if (wpa_s == NULL)
2581 return NULL;
2582 return wpa_s->ifname;
2583 }
2584 #endif /* CONFIG_NO_WPA_MSG */
2587 /**
2588 * wpa_supplicant_init - Initialize %wpa_supplicant
2589 * @params: Parameters for %wpa_supplicant
2590 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2591 *
2592 * This function is used to initialize %wpa_supplicant. After successful
2593 * initialization, the returned data pointer can be used to add and remove
2594 * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2595 */
2596 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2597 {
2598 struct wpa_global *global;
2599 int ret, i;
2601 if (params == NULL)
2602 return NULL;
2604 #ifdef CONFIG_DRIVER_NDIS
2605 {
2606 void driver_ndis_init_ops(void);
2607 driver_ndis_init_ops();
2608 }
2609 #endif /* CONFIG_DRIVER_NDIS */
2611 #ifndef CONFIG_NO_WPA_MSG
2612 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2613 #endif /* CONFIG_NO_WPA_MSG */
2615 wpa_debug_open_file(params->wpa_debug_file_path);
2616 if (params->wpa_debug_syslog)
2617 wpa_debug_open_syslog();
2619 ret = eap_register_methods();
2620 if (ret) {
2621 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2622 if (ret == -2)
2623 wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2624 "the same EAP type.");
2625 return NULL;
2626 }
2628 global = os_zalloc(sizeof(*global));
2629 if (global == NULL)
2630 return NULL;
2631 dl_list_init(&global->p2p_srv_bonjour);
2632 dl_list_init(&global->p2p_srv_upnp);
2633 global->params.daemonize = params->daemonize;
2634 global->params.wait_for_monitor = params->wait_for_monitor;
2635 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2636 if (params->pid_file)
2637 global->params.pid_file = os_strdup(params->pid_file);
2638 if (params->ctrl_interface)
2639 global->params.ctrl_interface =
2640 os_strdup(params->ctrl_interface);
2641 if (params->override_driver)
2642 global->params.override_driver =
2643 os_strdup(params->override_driver);
2644 if (params->override_ctrl_interface)
2645 global->params.override_ctrl_interface =
2646 os_strdup(params->override_ctrl_interface);
2647 wpa_debug_level = global->params.wpa_debug_level =
2648 params->wpa_debug_level;
2649 wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2650 params->wpa_debug_show_keys;
2651 wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2652 params->wpa_debug_timestamp;
2654 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2656 if (eloop_init()) {
2657 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2658 wpa_supplicant_deinit(global);
2659 return NULL;
2660 }
2662 random_init(params->entropy_file);
2664 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2665 if (global->ctrl_iface == NULL) {
2666 wpa_supplicant_deinit(global);
2667 return NULL;
2668 }
2670 if (wpas_notify_supplicant_initialized(global)) {
2671 wpa_supplicant_deinit(global);
2672 return NULL;
2673 }
2675 for (i = 0; wpa_drivers[i]; i++)
2676 global->drv_count++;
2677 if (global->drv_count == 0) {
2678 wpa_printf(MSG_ERROR, "No drivers enabled");
2679 wpa_supplicant_deinit(global);
2680 return NULL;
2681 }
2682 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2683 if (global->drv_priv == NULL) {
2684 wpa_supplicant_deinit(global);
2685 return NULL;
2686 }
2688 return global;
2689 }
2692 /**
2693 * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2694 * @global: Pointer to global data from wpa_supplicant_init()
2695 * Returns: 0 after successful event loop run, -1 on failure
2696 *
2697 * This function starts the main event loop and continues running as long as
2698 * there are any remaining events. In most cases, this function is running as
2699 * long as the %wpa_supplicant process in still in use.
2700 */
2701 int wpa_supplicant_run(struct wpa_global *global)
2702 {
2703 struct wpa_supplicant *wpa_s;
2705 if (global->params.daemonize &&
2706 wpa_supplicant_daemon(global->params.pid_file))
2707 return -1;
2709 if (global->params.wait_for_monitor) {
2710 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2711 if (wpa_s->ctrl_iface)
2712 wpa_supplicant_ctrl_iface_wait(
2713 wpa_s->ctrl_iface);
2714 }
2716 eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2717 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2719 eloop_run();
2721 return 0;
2722 }
2725 /**
2726 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2727 * @global: Pointer to global data from wpa_supplicant_init()
2728 *
2729 * This function is called to deinitialize %wpa_supplicant and to free all
2730 * allocated resources. Remaining network interfaces will also be removed.
2731 */
2732 void wpa_supplicant_deinit(struct wpa_global *global)
2733 {
2734 int i;
2736 if (global == NULL)
2737 return;
2739 #ifdef CONFIG_P2P
2740 wpas_p2p_deinit_global(global);
2741 #endif /* CONFIG_P2P */
2743 while (global->ifaces)
2744 wpa_supplicant_remove_iface(global, global->ifaces, 1);
2746 if (global->ctrl_iface)
2747 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2749 wpas_notify_supplicant_deinitialized(global);
2751 eap_peer_unregister_methods();
2752 #ifdef CONFIG_AP
2753 eap_server_unregister_methods();
2754 #endif /* CONFIG_AP */
2756 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2757 if (!global->drv_priv[i])
2758 continue;
2759 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2760 }
2761 os_free(global->drv_priv);
2763 random_deinit();
2765 eloop_destroy();
2767 if (global->params.pid_file) {
2768 os_daemonize_terminate(global->params.pid_file);
2769 os_free(global->params.pid_file);
2770 }
2771 os_free(global->params.ctrl_interface);
2772 os_free(global->params.override_driver);
2773 os_free(global->params.override_ctrl_interface);
2775 os_free(global);
2776 wpa_debug_close_syslog();
2777 wpa_debug_close_file();
2778 }
2781 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2782 {
2783 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
2784 wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
2785 char country[3];
2786 country[0] = wpa_s->conf->country[0];
2787 country[1] = wpa_s->conf->country[1];
2788 country[2] = '\0';
2789 if (wpa_drv_set_country(wpa_s, country) < 0) {
2790 wpa_printf(MSG_ERROR, "Failed to set country code "
2791 "'%s'", country);
2792 }
2793 }
2795 #ifdef CONFIG_WPS
2796 wpas_wps_update_config(wpa_s);
2797 #endif /* CONFIG_WPS */
2799 #ifdef CONFIG_P2P
2800 wpas_p2p_update_config(wpa_s);
2801 #endif /* CONFIG_P2P */
2803 wpa_s->conf->changed_parameters = 0;
2804 }
2807 static void add_freq(int *freqs, int *num_freqs, int freq)
2808 {
2809 int i;
2811 for (i = 0; i < *num_freqs; i++) {
2812 if (freqs[i] == freq)
2813 return;
2814 }
2816 freqs[*num_freqs] = freq;
2817 (*num_freqs)++;
2818 }
2821 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
2822 {
2823 struct wpa_bss *bss, *cbss;
2824 const int max_freqs = 10;
2825 int *freqs;
2826 int num_freqs = 0;
2828 freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
2829 if (freqs == NULL)
2830 return NULL;
2832 cbss = wpa_s->current_bss;
2834 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2835 if (bss == cbss)
2836 continue;
2837 if (bss->ssid_len == cbss->ssid_len &&
2838 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
2839 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
2840 add_freq(freqs, &num_freqs, bss->freq);
2841 if (num_freqs == max_freqs)
2842 break;
2843 }
2844 }
2846 if (num_freqs == 0) {
2847 os_free(freqs);
2848 freqs = NULL;
2849 }
2851 return freqs;
2852 }
2855 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
2856 {
2857 int timeout;
2858 int count;
2859 int *freqs = NULL;
2861 /*
2862 * Remove possible authentication timeout since the connection failed.
2863 */
2864 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
2866 /*
2867 * Add the failed BSSID into the blacklist and speed up next scan
2868 * attempt if there could be other APs that could accept association.
2869 * The current blacklist count indicates how many times we have tried
2870 * connecting to this AP and multiple attempts mean that other APs are
2871 * either not available or has already been tried, so that we can start
2872 * increasing the delay here to avoid constant scanning.
2873 */
2874 count = wpa_blacklist_add(wpa_s, bssid);
2875 if (count == 1 && wpa_s->current_bss) {
2876 /*
2877 * This BSS was not in the blacklist before. If there is
2878 * another BSS available for the same ESS, we should try that
2879 * next. Otherwise, we may as well try this one once more
2880 * before allowing other, likely worse, ESSes to be considered.
2881 */
2882 freqs = get_bss_freqs_in_ess(wpa_s);
2883 if (freqs) {
2884 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
2885 "has been seen; try it next");
2886 wpa_blacklist_add(wpa_s, bssid);
2887 /*
2888 * On the next scan, go through only the known channels
2889 * used in this ESS based on previous scans to speed up
2890 * common load balancing use case.
2891 */
2892 os_free(wpa_s->next_scan_freqs);
2893 wpa_s->next_scan_freqs = freqs;
2894 }
2895 }
2897 switch (count) {
2898 case 1:
2899 timeout = 100;
2900 break;
2901 case 2:
2902 timeout = 500;
2903 break;
2904 case 3:
2905 timeout = 1000;
2906 break;
2907 default:
2908 timeout = 5000;
2909 }
2911 /*
2912 * TODO: if more than one possible AP is available in scan results,
2913 * could try the other ones before requesting a new scan.
2914 */
2915 wpa_supplicant_req_scan(wpa_s, timeout / 1000,
2916 1000 * (timeout % 1000));
2917 }
2920 int wpas_driver_bss_selection(struct wpa_supplicant *wpa_s)
2921 {
2922 return wpa_s->conf->ap_scan == 2 ||
2923 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION);
2924 }