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) 2003-2011, 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 (ssid->key_mgmt &
1084 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
1085 {
1086 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1087 #ifndef CONFIG_NO_PBKDF2
1088 if (bss && ssid->bssid_set && ssid->ssid_len == 0 &&
1089 ssid->passphrase) {
1090 u8 psk[PMK_LEN];
1091 pbkdf2_sha1(ssid->passphrase, (char *) bss->ssid,
1092 bss->ssid_len, 4096, psk, PMK_LEN);
1093 wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
1094 psk, PMK_LEN);
1095 wpa_sm_set_pmk(wpa_s->wpa, psk, PMK_LEN);
1096 }
1097 #endif /* CONFIG_NO_PBKDF2 */
1098 } else
1099 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1101 return 0;
1102 }
1105 /**
1106 * wpa_supplicant_associate - Request association
1107 * @wpa_s: Pointer to wpa_supplicant data
1108 * @bss: Scan results for the selected BSS, or %NULL if not available
1109 * @ssid: Configuration data for the selected network
1110 *
1111 * This function is used to request %wpa_supplicant to associate with a BSS.
1112 */
1113 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1114 struct wpa_bss *bss, struct wpa_ssid *ssid)
1115 {
1116 u8 wpa_ie[200];
1117 size_t wpa_ie_len;
1118 int use_crypt, ret, i, bssid_changed;
1119 int algs = WPA_AUTH_ALG_OPEN;
1120 enum wpa_cipher cipher_pairwise, cipher_group;
1121 struct wpa_driver_associate_params params;
1122 int wep_keys_set = 0;
1123 struct wpa_driver_capa capa;
1124 int assoc_failed = 0;
1125 struct wpa_ssid *old_ssid;
1127 #ifdef CONFIG_IBSS_RSN
1128 ibss_rsn_deinit(wpa_s->ibss_rsn);
1129 wpa_s->ibss_rsn = NULL;
1130 #endif /* CONFIG_IBSS_RSN */
1132 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1133 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1134 #ifdef CONFIG_AP
1135 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1136 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1137 "mode");
1138 return;
1139 }
1140 wpa_supplicant_create_ap(wpa_s, ssid);
1141 wpa_s->current_bss = bss;
1142 #else /* CONFIG_AP */
1143 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1144 "the build");
1145 #endif /* CONFIG_AP */
1146 return;
1147 }
1149 #ifdef CONFIG_TDLS
1150 if (bss)
1151 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
1152 bss->ie_len);
1153 #endif /* CONFIG_TDLS */
1155 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1156 ssid->mode == IEEE80211_MODE_INFRA) {
1157 sme_authenticate(wpa_s, bss, ssid);
1158 return;
1159 }
1161 os_memset(¶ms, 0, sizeof(params));
1162 wpa_s->reassociate = 0;
1163 if (bss && !wpas_driver_bss_selection(wpa_s)) {
1164 #ifdef CONFIG_IEEE80211R
1165 const u8 *ie, *md = NULL;
1166 #endif /* CONFIG_IEEE80211R */
1167 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1168 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1169 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1170 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1171 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1172 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1173 if (bssid_changed)
1174 wpas_notify_bssid_changed(wpa_s);
1175 #ifdef CONFIG_IEEE80211R
1176 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1177 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1178 md = ie + 2;
1179 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1180 if (md) {
1181 /* Prepare for the next transition */
1182 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1183 }
1184 #endif /* CONFIG_IEEE80211R */
1185 #ifdef CONFIG_WPS
1186 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1187 wpa_s->conf->ap_scan == 2 &&
1188 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1189 /* Use ap_scan==1 style network selection to find the network
1190 */
1191 wpa_s->scan_req = 2;
1192 wpa_s->reassociate = 1;
1193 wpa_supplicant_req_scan(wpa_s, 0, 0);
1194 return;
1195 #endif /* CONFIG_WPS */
1196 } else {
1197 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1198 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1199 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1200 }
1201 wpa_supplicant_cancel_sched_scan(wpa_s);
1202 wpa_supplicant_cancel_scan(wpa_s);
1204 /* Starting new association, so clear the possibly used WPA IE from the
1205 * previous association. */
1206 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1208 #ifdef IEEE8021X_EAPOL
1209 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1210 if (ssid->leap) {
1211 if (ssid->non_leap == 0)
1212 algs = WPA_AUTH_ALG_LEAP;
1213 else
1214 algs |= WPA_AUTH_ALG_LEAP;
1215 }
1216 }
1217 #endif /* IEEE8021X_EAPOL */
1218 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1219 if (ssid->auth_alg) {
1220 algs = ssid->auth_alg;
1221 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1222 "0x%x", algs);
1223 }
1225 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1226 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1227 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1228 WPA_KEY_MGMT_FT_IEEE8021X |
1229 WPA_KEY_MGMT_FT_PSK |
1230 WPA_KEY_MGMT_IEEE8021X_SHA256 |
1231 WPA_KEY_MGMT_PSK_SHA256))) {
1232 int try_opportunistic;
1233 try_opportunistic = ssid->proactive_key_caching &&
1234 (ssid->proto & WPA_PROTO_RSN);
1235 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1236 wpa_s->current_ssid,
1237 try_opportunistic) == 0)
1238 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1239 wpa_ie_len = sizeof(wpa_ie);
1240 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1241 wpa_ie, &wpa_ie_len)) {
1242 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1243 "key management and encryption suites");
1244 return;
1245 }
1246 } else if (ssid->key_mgmt &
1247 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1248 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1249 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1250 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1251 wpa_ie_len = sizeof(wpa_ie);
1252 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1253 wpa_ie, &wpa_ie_len)) {
1254 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1255 "key management and encryption suites (no "
1256 "scan results)");
1257 return;
1258 }
1259 #ifdef CONFIG_WPS
1260 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1261 struct wpabuf *wps_ie;
1262 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1263 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1264 wpa_ie_len = wpabuf_len(wps_ie);
1265 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1266 } else
1267 wpa_ie_len = 0;
1268 wpabuf_free(wps_ie);
1269 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1270 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1271 params.wps = WPS_MODE_PRIVACY;
1272 else
1273 params.wps = WPS_MODE_OPEN;
1274 wpa_s->wpa_proto = 0;
1275 #endif /* CONFIG_WPS */
1276 } else {
1277 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1278 wpa_ie_len = 0;
1279 wpa_s->wpa_proto = 0;
1280 }
1282 #ifdef CONFIG_P2P
1283 if (wpa_s->global->p2p) {
1284 u8 *pos;
1285 size_t len;
1286 int res;
1287 int p2p_group;
1288 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1289 pos = wpa_ie + wpa_ie_len;
1290 len = sizeof(wpa_ie) - wpa_ie_len;
1291 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1292 if (res >= 0)
1293 wpa_ie_len += res;
1294 }
1296 wpa_s->cross_connect_disallowed = 0;
1297 if (bss) {
1298 struct wpabuf *p2p;
1299 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1300 if (p2p) {
1301 wpa_s->cross_connect_disallowed =
1302 p2p_get_cross_connect_disallowed(p2p);
1303 wpabuf_free(p2p);
1304 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1305 "connection",
1306 wpa_s->cross_connect_disallowed ?
1307 "disallows" : "allows");
1308 }
1309 }
1310 #endif /* CONFIG_P2P */
1312 #ifdef CONFIG_INTERWORKING
1313 if (wpa_s->conf->interworking) {
1314 u8 *pos = wpa_ie;
1315 if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN)
1316 pos += 2 + pos[1];
1317 os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie));
1318 wpa_ie_len += 6;
1319 *pos++ = WLAN_EID_EXT_CAPAB;
1320 *pos++ = 4;
1321 *pos++ = 0x00;
1322 *pos++ = 0x00;
1323 *pos++ = 0x00;
1324 *pos++ = 0x80; /* Bit 31 - Interworking */
1325 }
1326 #endif /* CONFIG_INTERWORKING */
1328 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1329 use_crypt = 1;
1330 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1331 cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1332 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1333 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1334 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1335 use_crypt = 0;
1336 if (wpa_set_wep_keys(wpa_s, ssid)) {
1337 use_crypt = 1;
1338 wep_keys_set = 1;
1339 }
1340 }
1341 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1342 use_crypt = 0;
1344 #ifdef IEEE8021X_EAPOL
1345 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1346 if ((ssid->eapol_flags &
1347 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1348 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1349 !wep_keys_set) {
1350 use_crypt = 0;
1351 } else {
1352 /* Assume that dynamic WEP-104 keys will be used and
1353 * set cipher suites in order for drivers to expect
1354 * encryption. */
1355 cipher_pairwise = cipher_group = CIPHER_WEP104;
1356 }
1357 }
1358 #endif /* IEEE8021X_EAPOL */
1360 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1361 /* Set the key before (and later after) association */
1362 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1363 }
1365 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1366 if (bss) {
1367 params.ssid = bss->ssid;
1368 params.ssid_len = bss->ssid_len;
1369 if (!wpas_driver_bss_selection(wpa_s)) {
1370 params.bssid = bss->bssid;
1371 params.freq = bss->freq;
1372 }
1373 } else {
1374 params.ssid = ssid->ssid;
1375 params.ssid_len = ssid->ssid_len;
1376 }
1377 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1378 params.freq == 0)
1379 params.freq = ssid->frequency; /* Initial channel for IBSS */
1380 params.wpa_ie = wpa_ie;
1381 params.wpa_ie_len = wpa_ie_len;
1382 params.pairwise_suite = cipher_pairwise;
1383 params.group_suite = cipher_group;
1384 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1385 params.wpa_proto = wpa_s->wpa_proto;
1386 params.auth_alg = algs;
1387 params.mode = ssid->mode;
1388 for (i = 0; i < NUM_WEP_KEYS; i++) {
1389 if (ssid->wep_key_len[i])
1390 params.wep_key[i] = ssid->wep_key[i];
1391 params.wep_key_len[i] = ssid->wep_key_len[i];
1392 }
1393 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1395 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1396 (params.key_mgmt_suite == KEY_MGMT_PSK ||
1397 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1398 params.passphrase = ssid->passphrase;
1399 if (ssid->psk_set)
1400 params.psk = ssid->psk;
1401 }
1403 params.drop_unencrypted = use_crypt;
1405 #ifdef CONFIG_IEEE80211W
1406 params.mgmt_frame_protection = ssid->ieee80211w;
1407 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1408 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1409 struct wpa_ie_data ie;
1410 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1411 ie.capabilities &
1412 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1413 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1414 "MFP: require MFP");
1415 params.mgmt_frame_protection =
1416 MGMT_FRAME_PROTECTION_REQUIRED;
1417 }
1418 }
1419 #endif /* CONFIG_IEEE80211W */
1421 params.p2p = ssid->p2p_group;
1423 if (wpa_s->parent->set_sta_uapsd)
1424 params.uapsd = wpa_s->parent->sta_uapsd;
1425 else
1426 params.uapsd = -1;
1428 ret = wpa_drv_associate(wpa_s, ¶ms);
1429 if (ret < 0) {
1430 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1431 "failed");
1432 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1433 /*
1434 * The driver is known to mean what is saying, so we
1435 * can stop right here; the association will not
1436 * succeed.
1437 */
1438 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1439 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1440 return;
1441 }
1442 /* try to continue anyway; new association will be tried again
1443 * after timeout */
1444 assoc_failed = 1;
1445 }
1447 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1448 /* Set the key after the association just in case association
1449 * cleared the previously configured key. */
1450 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1451 /* No need to timeout authentication since there is no key
1452 * management. */
1453 wpa_supplicant_cancel_auth_timeout(wpa_s);
1454 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1455 #ifdef CONFIG_IBSS_RSN
1456 } else if (ssid->mode == WPAS_MODE_IBSS &&
1457 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1458 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1459 /*
1460 * RSN IBSS authentication is per-STA and we can disable the
1461 * per-BSSID authentication.
1462 */
1463 wpa_supplicant_cancel_auth_timeout(wpa_s);
1464 #endif /* CONFIG_IBSS_RSN */
1465 } else {
1466 /* Timeout for IEEE 802.11 authentication and association */
1467 int timeout = 60;
1469 if (assoc_failed) {
1470 /* give IBSS a bit more time */
1471 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1472 } else if (wpa_s->conf->ap_scan == 1) {
1473 /* give IBSS a bit more time */
1474 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1475 }
1476 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1477 }
1479 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1480 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1481 /* Set static WEP keys again */
1482 wpa_set_wep_keys(wpa_s, ssid);
1483 }
1485 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1486 /*
1487 * Do not allow EAP session resumption between different
1488 * network configurations.
1489 */
1490 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1491 }
1492 old_ssid = wpa_s->current_ssid;
1493 wpa_s->current_ssid = ssid;
1494 wpa_s->current_bss = bss;
1495 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1496 wpa_supplicant_initiate_eapol(wpa_s);
1497 if (old_ssid != wpa_s->current_ssid)
1498 wpas_notify_network_changed(wpa_s);
1499 }
1502 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1503 const u8 *addr)
1504 {
1505 struct wpa_ssid *old_ssid;
1507 wpa_clear_keys(wpa_s, addr);
1508 wpa_supplicant_mark_disassoc(wpa_s);
1509 old_ssid = wpa_s->current_ssid;
1510 wpa_s->current_ssid = NULL;
1511 wpa_s->current_bss = NULL;
1512 wpa_sm_set_config(wpa_s->wpa, NULL);
1513 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1514 if (old_ssid != wpa_s->current_ssid)
1515 wpas_notify_network_changed(wpa_s);
1516 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1517 }
1520 /**
1521 * wpa_supplicant_disassociate - Disassociate the current connection
1522 * @wpa_s: Pointer to wpa_supplicant data
1523 * @reason_code: IEEE 802.11 reason code for the disassociate frame
1524 *
1525 * This function is used to request %wpa_supplicant to disassociate with the
1526 * current AP.
1527 */
1528 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1529 int reason_code)
1530 {
1531 u8 *addr = NULL;
1533 if (!is_zero_ether_addr(wpa_s->bssid)) {
1534 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1535 addr = wpa_s->bssid;
1536 }
1538 wpa_supplicant_clear_connection(wpa_s, addr);
1539 }
1542 /**
1543 * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1544 * @wpa_s: Pointer to wpa_supplicant data
1545 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1546 *
1547 * This function is used to request %wpa_supplicant to deauthenticate from the
1548 * current AP.
1549 */
1550 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1551 int reason_code)
1552 {
1553 u8 *addr = NULL;
1555 if (!is_zero_ether_addr(wpa_s->bssid)) {
1556 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, reason_code);
1557 addr = wpa_s->bssid;
1558 }
1560 wpa_supplicant_clear_connection(wpa_s, addr);
1561 }
1564 /**
1565 * wpa_supplicant_enable_network - Mark a configured network as enabled
1566 * @wpa_s: wpa_supplicant structure for a network interface
1567 * @ssid: wpa_ssid structure for a configured network or %NULL
1568 *
1569 * Enables the specified network or all networks if no network specified.
1570 */
1571 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1572 struct wpa_ssid *ssid)
1573 {
1574 struct wpa_ssid *other_ssid;
1575 int was_disabled;
1577 if (ssid == NULL) {
1578 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1579 other_ssid = other_ssid->next) {
1580 if (other_ssid->disabled == 2)
1581 continue; /* do not change persistent P2P group
1582 * data */
1583 if (other_ssid == wpa_s->current_ssid &&
1584 other_ssid->disabled)
1585 wpa_s->reassociate = 1;
1587 was_disabled = other_ssid->disabled;
1589 other_ssid->disabled = 0;
1591 if (was_disabled != other_ssid->disabled)
1592 wpas_notify_network_enabled_changed(
1593 wpa_s, other_ssid);
1594 }
1595 if (wpa_s->reassociate)
1596 wpa_supplicant_req_scan(wpa_s, 0, 0);
1597 } else if (ssid->disabled && ssid->disabled != 2) {
1598 if (wpa_s->current_ssid == NULL) {
1599 /*
1600 * Try to reassociate since there is no current
1601 * configuration and a new network was made available.
1602 */
1603 wpa_s->reassociate = 1;
1604 wpa_supplicant_req_scan(wpa_s, 0, 0);
1605 }
1607 was_disabled = ssid->disabled;
1609 ssid->disabled = 0;
1611 if (was_disabled != ssid->disabled)
1612 wpas_notify_network_enabled_changed(wpa_s, ssid);
1613 }
1614 }
1617 /**
1618 * wpa_supplicant_disable_network - Mark a configured network as disabled
1619 * @wpa_s: wpa_supplicant structure for a network interface
1620 * @ssid: wpa_ssid structure for a configured network or %NULL
1621 *
1622 * Disables the specified network or all networks if no network specified.
1623 */
1624 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1625 struct wpa_ssid *ssid)
1626 {
1627 struct wpa_ssid *other_ssid;
1628 int was_disabled;
1630 if (ssid == NULL) {
1631 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1632 other_ssid = other_ssid->next) {
1633 was_disabled = other_ssid->disabled;
1634 if (was_disabled == 2)
1635 continue; /* do not change persistent P2P group
1636 * data */
1638 other_ssid->disabled = 1;
1640 if (was_disabled != other_ssid->disabled)
1641 wpas_notify_network_enabled_changed(
1642 wpa_s, other_ssid);
1643 }
1644 if (wpa_s->current_ssid)
1645 wpa_supplicant_disassociate(
1646 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1647 } else if (ssid->disabled != 2) {
1648 if (ssid == wpa_s->current_ssid)
1649 wpa_supplicant_disassociate(
1650 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1652 was_disabled = ssid->disabled;
1654 ssid->disabled = 1;
1656 if (was_disabled != ssid->disabled)
1657 wpas_notify_network_enabled_changed(wpa_s, ssid);
1658 }
1659 }
1662 /**
1663 * wpa_supplicant_select_network - Attempt association with a network
1664 * @wpa_s: wpa_supplicant structure for a network interface
1665 * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1666 */
1667 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1668 struct wpa_ssid *ssid)
1669 {
1671 struct wpa_ssid *other_ssid;
1673 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1674 wpa_supplicant_disassociate(
1675 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1677 /*
1678 * Mark all other networks disabled or mark all networks enabled if no
1679 * network specified.
1680 */
1681 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1682 other_ssid = other_ssid->next) {
1683 int was_disabled = other_ssid->disabled;
1684 if (was_disabled == 2)
1685 continue; /* do not change persistent P2P group data */
1687 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1689 if (was_disabled != other_ssid->disabled)
1690 wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1691 }
1693 if (ssid && ssid == wpa_s->current_ssid && wpa_s->current_ssid) {
1694 /* We are already associated with the selected network */
1695 wpa_printf(MSG_DEBUG, "Already associated with the "
1696 "selected network - do nothing");
1697 return;
1698 }
1700 wpa_s->connect_without_scan = NULL;
1701 wpa_s->disconnected = 0;
1702 wpa_s->reassociate = 1;
1703 wpa_supplicant_req_scan(wpa_s, 0, 0);
1705 if (ssid)
1706 wpas_notify_network_selected(wpa_s, ssid);
1707 }
1710 /**
1711 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1712 * @wpa_s: wpa_supplicant structure for a network interface
1713 * @ap_scan: AP scan mode
1714 * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1715 *
1716 */
1717 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1718 {
1720 int old_ap_scan;
1722 if (ap_scan < 0 || ap_scan > 2)
1723 return -1;
1725 #ifdef ANDROID
1726 if (ap_scan == 2 && ap_scan != wpa_s->conf->ap_scan &&
1727 wpa_s->wpa_state >= WPA_ASSOCIATING &&
1728 wpa_s->wpa_state < WPA_COMPLETED) {
1729 wpa_printf(MSG_ERROR, "ap_scan = %d (%d) rejected while "
1730 "associating", wpa_s->conf->ap_scan, ap_scan);
1731 return 0;
1732 }
1733 #endif /* ANDROID */
1735 old_ap_scan = wpa_s->conf->ap_scan;
1736 wpa_s->conf->ap_scan = ap_scan;
1738 if (old_ap_scan != wpa_s->conf->ap_scan)
1739 wpas_notify_ap_scan_changed(wpa_s);
1741 return 0;
1742 }
1745 /**
1746 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age
1747 * @wpa_s: wpa_supplicant structure for a network interface
1748 * @expire_age: Expiration age in seconds
1749 * Returns: 0 if succeed or -1 if expire_age has an invalid value
1750 *
1751 */
1752 int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
1753 unsigned int bss_expire_age)
1754 {
1755 if (bss_expire_age < 10) {
1756 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u",
1757 bss_expire_age);
1758 return -1;
1759 }
1760 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec",
1761 bss_expire_age);
1762 wpa_s->conf->bss_expiration_age = bss_expire_age;
1764 return 0;
1765 }
1768 /**
1769 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count
1770 * @wpa_s: wpa_supplicant structure for a network interface
1771 * @expire_count: number of scans after which an unseen BSS is reclaimed
1772 * Returns: 0 if succeed or -1 if expire_count has an invalid value
1773 *
1774 */
1775 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
1776 unsigned int bss_expire_count)
1777 {
1778 if (bss_expire_count < 1) {
1779 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u",
1780 bss_expire_count);
1781 return -1;
1782 }
1783 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u",
1784 bss_expire_count);
1785 wpa_s->conf->bss_expiration_scan_count = bss_expire_count;
1787 return 0;
1788 }
1791 /**
1792 * wpa_supplicant_set_debug_params - Set global debug params
1793 * @global: wpa_global structure
1794 * @debug_level: debug level
1795 * @debug_timestamp: determines if show timestamp in debug data
1796 * @debug_show_keys: determines if show keys in debug data
1797 * Returns: 0 if succeed or -1 if debug_level has wrong value
1798 */
1799 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1800 int debug_timestamp, int debug_show_keys)
1801 {
1803 int old_level, old_timestamp, old_show_keys;
1805 /* check for allowed debuglevels */
1806 if (debug_level != MSG_EXCESSIVE &&
1807 debug_level != MSG_MSGDUMP &&
1808 debug_level != MSG_DEBUG &&
1809 debug_level != MSG_INFO &&
1810 debug_level != MSG_WARNING &&
1811 debug_level != MSG_ERROR)
1812 return -1;
1814 old_level = wpa_debug_level;
1815 old_timestamp = wpa_debug_timestamp;
1816 old_show_keys = wpa_debug_show_keys;
1818 wpa_debug_level = debug_level;
1819 wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1820 wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1822 if (wpa_debug_level != old_level)
1823 wpas_notify_debug_level_changed(global);
1824 if (wpa_debug_timestamp != old_timestamp)
1825 wpas_notify_debug_timestamp_changed(global);
1826 if (wpa_debug_show_keys != old_show_keys)
1827 wpas_notify_debug_show_keys_changed(global);
1829 return 0;
1830 }
1833 /**
1834 * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1835 * @wpa_s: Pointer to wpa_supplicant data
1836 * Returns: A pointer to the current network structure or %NULL on failure
1837 */
1838 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1839 {
1840 struct wpa_ssid *entry;
1841 u8 ssid[MAX_SSID_LEN];
1842 int res;
1843 size_t ssid_len;
1844 u8 bssid[ETH_ALEN];
1845 int wired;
1847 res = wpa_drv_get_ssid(wpa_s, ssid);
1848 if (res < 0) {
1849 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1850 "driver");
1851 return NULL;
1852 }
1853 ssid_len = res;
1855 if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1856 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1857 "driver");
1858 return NULL;
1859 }
1861 wired = wpa_s->conf->ap_scan == 0 &&
1862 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1864 entry = wpa_s->conf->ssid;
1865 while (entry) {
1866 if (!entry->disabled &&
1867 ((ssid_len == entry->ssid_len &&
1868 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1869 (!entry->bssid_set ||
1870 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1871 return entry;
1872 #ifdef CONFIG_WPS
1873 if (!entry->disabled &&
1874 (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1875 (entry->ssid == NULL || entry->ssid_len == 0) &&
1876 (!entry->bssid_set ||
1877 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1878 return entry;
1879 #endif /* CONFIG_WPS */
1881 if (!entry->disabled && entry->bssid_set &&
1882 entry->ssid_len == 0 &&
1883 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)
1884 return entry;
1886 entry = entry->next;
1887 }
1889 return NULL;
1890 }
1893 static int select_driver(struct wpa_supplicant *wpa_s, int i)
1894 {
1895 struct wpa_global *global = wpa_s->global;
1897 if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) {
1898 global->drv_priv[i] = wpa_drivers[i]->global_init();
1899 if (global->drv_priv[i] == NULL) {
1900 wpa_printf(MSG_ERROR, "Failed to initialize driver "
1901 "'%s'", wpa_drivers[i]->name);
1902 return -1;
1903 }
1904 }
1906 wpa_s->driver = wpa_drivers[i];
1907 wpa_s->global_drv_priv = global->drv_priv[i];
1909 return 0;
1910 }
1913 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1914 const char *name)
1915 {
1916 int i;
1917 size_t len;
1918 const char *pos, *driver = name;
1920 if (wpa_s == NULL)
1921 return -1;
1923 if (wpa_drivers[0] == NULL) {
1924 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1925 "wpa_supplicant");
1926 return -1;
1927 }
1929 if (name == NULL) {
1930 /* default to first driver in the list */
1931 return select_driver(wpa_s, 0);
1932 }
1934 do {
1935 pos = os_strchr(driver, ',');
1936 if (pos)
1937 len = pos - driver;
1938 else
1939 len = os_strlen(driver);
1941 for (i = 0; wpa_drivers[i]; i++) {
1942 if (os_strlen(wpa_drivers[i]->name) == len &&
1943 os_strncmp(driver, wpa_drivers[i]->name, len) ==
1944 0)
1945 return select_driver(wpa_s, i);
1946 }
1948 driver = pos + 1;
1949 } while (pos);
1951 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1952 return -1;
1953 }
1956 /**
1957 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1958 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1959 * with struct wpa_driver_ops::init()
1960 * @src_addr: Source address of the EAPOL frame
1961 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1962 * @len: Length of the EAPOL data
1963 *
1964 * This function is called for each received EAPOL frame. Most driver
1965 * interfaces rely on more generic OS mechanism for receiving frames through
1966 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1967 * take care of received EAPOL frames and deliver them to the core supplicant
1968 * code by calling this function.
1969 */
1970 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1971 const u8 *buf, size_t len)
1972 {
1973 struct wpa_supplicant *wpa_s = ctx;
1975 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1976 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1978 if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1979 /*
1980 * There is possible race condition between receiving the
1981 * association event and the EAPOL frame since they are coming
1982 * through different paths from the driver. In order to avoid
1983 * issues in trying to process the EAPOL frame before receiving
1984 * association information, lets queue it for processing until
1985 * the association event is received.
1986 */
1987 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
1988 "of received EAPOL frame");
1989 wpabuf_free(wpa_s->pending_eapol_rx);
1990 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1991 if (wpa_s->pending_eapol_rx) {
1992 os_get_time(&wpa_s->pending_eapol_rx_time);
1993 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1994 ETH_ALEN);
1995 }
1996 return;
1997 }
1999 #ifdef CONFIG_AP
2000 if (wpa_s->ap_iface) {
2001 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
2002 return;
2003 }
2004 #endif /* CONFIG_AP */
2006 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
2007 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
2008 "no key management is configured");
2009 return;
2010 }
2012 if (wpa_s->eapol_received == 0 &&
2013 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
2014 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
2015 wpa_s->wpa_state != WPA_COMPLETED) &&
2016 (wpa_s->current_ssid == NULL ||
2017 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
2018 /* Timeout for completing IEEE 802.1X and WPA authentication */
2019 wpa_supplicant_req_auth_timeout(
2020 wpa_s,
2021 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
2022 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
2023 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
2024 70 : 10, 0);
2025 }
2026 wpa_s->eapol_received++;
2028 if (wpa_s->countermeasures) {
2029 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
2030 "EAPOL packet");
2031 return;
2032 }
2034 #ifdef CONFIG_IBSS_RSN
2035 if (wpa_s->current_ssid &&
2036 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
2037 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
2038 return;
2039 }
2040 #endif /* CONFIG_IBSS_RSN */
2042 /* Source address of the incoming EAPOL frame could be compared to the
2043 * current BSSID. However, it is possible that a centralized
2044 * Authenticator could be using another MAC address than the BSSID of
2045 * an AP, so just allow any address to be used for now. The replies are
2046 * still sent to the current BSSID (if available), though. */
2048 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
2049 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
2050 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
2051 return;
2052 wpa_drv_poll(wpa_s);
2053 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
2054 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
2055 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
2056 /*
2057 * Set portValid = TRUE here since we are going to skip 4-way
2058 * handshake processing which would normally set portValid. We
2059 * need this to allow the EAPOL state machines to be completed
2060 * without going through EAPOL-Key handshake.
2061 */
2062 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
2063 }
2064 }
2067 /**
2068 * wpa_supplicant_driver_init - Initialize driver interface parameters
2069 * @wpa_s: Pointer to wpa_supplicant data
2070 * Returns: 0 on success, -1 on failure
2071 *
2072 * This function is called to initialize driver interface parameters.
2073 * wpa_drv_init() must have been called before this function to initialize the
2074 * driver interface.
2075 */
2076 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
2077 {
2078 static int interface_count = 0;
2080 if (wpa_s->driver->send_eapol) {
2081 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2082 if (addr)
2083 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2084 } else if (!(wpa_s->drv_flags &
2085 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
2086 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
2087 wpa_drv_get_mac_addr(wpa_s),
2088 ETH_P_EAPOL,
2089 wpa_supplicant_rx_eapol, wpa_s, 0);
2090 if (wpa_s->l2 == NULL)
2091 return -1;
2092 } else {
2093 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2094 if (addr)
2095 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2096 }
2098 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
2099 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
2100 return -1;
2101 }
2103 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
2104 MAC2STR(wpa_s->own_addr));
2106 if (wpa_s->bridge_ifname[0]) {
2107 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
2108 "interface '%s'", wpa_s->bridge_ifname);
2109 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
2110 wpa_s->own_addr,
2111 ETH_P_EAPOL,
2112 wpa_supplicant_rx_eapol, wpa_s,
2113 0);
2114 if (wpa_s->l2_br == NULL) {
2115 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
2116 "connection for the bridge interface '%s'",
2117 wpa_s->bridge_ifname);
2118 return -1;
2119 }
2120 }
2122 wpa_clear_keys(wpa_s, NULL);
2124 /* Make sure that TKIP countermeasures are not left enabled (could
2125 * happen if wpa_supplicant is killed during countermeasures. */
2126 wpa_drv_set_countermeasures(wpa_s, 0);
2128 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
2129 wpa_drv_flush_pmkid(wpa_s);
2131 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
2132 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
2133 if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count,
2134 100000))
2135 wpa_supplicant_req_scan(wpa_s, interface_count,
2136 100000);
2137 interface_count++;
2138 } else
2139 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
2141 return 0;
2142 }
2145 static int wpa_supplicant_daemon(const char *pid_file)
2146 {
2147 wpa_printf(MSG_DEBUG, "Daemonize..");
2148 return os_daemonize(pid_file);
2149 }
2152 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2153 {
2154 struct wpa_supplicant *wpa_s;
2156 wpa_s = os_zalloc(sizeof(*wpa_s));
2157 if (wpa_s == NULL)
2158 return NULL;
2159 wpa_s->scan_req = 1;
2160 wpa_s->scan_interval = 5;
2161 wpa_s->new_connection = 1;
2162 wpa_s->parent = wpa_s;
2163 wpa_s->sched_scanning = 0;
2165 return wpa_s;
2166 }
2169 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2170 struct wpa_interface *iface)
2171 {
2172 const char *ifname, *driver;
2173 struct wpa_driver_capa capa;
2175 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2176 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2177 iface->confname ? iface->confname : "N/A",
2178 iface->driver ? iface->driver : "default",
2179 iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2180 iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2182 if (iface->confname) {
2183 #ifdef CONFIG_BACKEND_FILE
2184 wpa_s->confname = os_rel2abs_path(iface->confname);
2185 if (wpa_s->confname == NULL) {
2186 wpa_printf(MSG_ERROR, "Failed to get absolute path "
2187 "for configuration file '%s'.",
2188 iface->confname);
2189 return -1;
2190 }
2191 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2192 iface->confname, wpa_s->confname);
2193 #else /* CONFIG_BACKEND_FILE */
2194 wpa_s->confname = os_strdup(iface->confname);
2195 #endif /* CONFIG_BACKEND_FILE */
2196 wpa_s->conf = wpa_config_read(wpa_s->confname);
2197 if (wpa_s->conf == NULL) {
2198 wpa_printf(MSG_ERROR, "Failed to read or parse "
2199 "configuration '%s'.", wpa_s->confname);
2200 return -1;
2201 }
2203 /*
2204 * Override ctrl_interface and driver_param if set on command
2205 * line.
2206 */
2207 if (iface->ctrl_interface) {
2208 os_free(wpa_s->conf->ctrl_interface);
2209 wpa_s->conf->ctrl_interface =
2210 os_strdup(iface->ctrl_interface);
2211 }
2213 if (iface->driver_param) {
2214 os_free(wpa_s->conf->driver_param);
2215 wpa_s->conf->driver_param =
2216 os_strdup(iface->driver_param);
2217 }
2218 } else
2219 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2220 iface->driver_param);
2222 if (wpa_s->conf == NULL) {
2223 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2224 return -1;
2225 }
2227 if (iface->ifname == NULL) {
2228 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2229 return -1;
2230 }
2231 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2232 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2233 iface->ifname);
2234 return -1;
2235 }
2236 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2238 if (iface->bridge_ifname) {
2239 if (os_strlen(iface->bridge_ifname) >=
2240 sizeof(wpa_s->bridge_ifname)) {
2241 wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2242 "name '%s'.", iface->bridge_ifname);
2243 return -1;
2244 }
2245 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2246 sizeof(wpa_s->bridge_ifname));
2247 }
2249 /* RSNA Supplicant Key Management - INITIALIZE */
2250 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2251 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2253 /* Initialize driver interface and register driver event handler before
2254 * L2 receive handler so that association events are processed before
2255 * EAPOL-Key packets if both become available for the same select()
2256 * call. */
2257 driver = iface->driver;
2258 next_driver:
2259 if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2260 return -1;
2262 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2263 if (wpa_s->drv_priv == NULL) {
2264 const char *pos;
2265 pos = driver ? os_strchr(driver, ',') : NULL;
2266 if (pos) {
2267 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2268 "driver interface - try next driver wrapper");
2269 driver = pos + 1;
2270 goto next_driver;
2271 }
2272 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2273 "interface");
2274 return -1;
2275 }
2276 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2277 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2278 "driver_param '%s'", wpa_s->conf->driver_param);
2279 return -1;
2280 }
2282 ifname = wpa_drv_get_ifname(wpa_s);
2283 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2284 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2285 "interface name with '%s'", ifname);
2286 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2287 }
2289 if (wpa_supplicant_init_wpa(wpa_s) < 0)
2290 return -1;
2292 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2293 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2294 NULL);
2295 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2297 if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2298 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2299 wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2300 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2301 "dot11RSNAConfigPMKLifetime");
2302 return -1;
2303 }
2305 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2306 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2307 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2308 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2309 "dot11RSNAConfigPMKReauthThreshold");
2310 return -1;
2311 }
2313 if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2314 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2315 wpa_s->conf->dot11RSNAConfigSATimeout)) {
2316 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2317 "dot11RSNAConfigSATimeout");
2318 return -1;
2319 }
2321 wpa_s->hw.modes = wpa_drv_get_hw_feature_data(wpa_s,
2322 &wpa_s->hw.num_modes,
2323 &wpa_s->hw.flags);
2325 if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2326 wpa_s->drv_capa_known = 1;
2327 wpa_s->drv_flags = capa.flags;
2328 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2329 wpa_s->max_sched_scan_ssids = capa.max_sched_scan_ssids;
2330 wpa_s->sched_scan_supported = capa.sched_scan_supported;
2331 wpa_s->max_match_sets = capa.max_match_sets;
2332 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2333 wpa_s->max_stations = capa.max_stations;
2334 }
2335 if (wpa_s->max_remain_on_chan == 0)
2336 wpa_s->max_remain_on_chan = 1000;
2338 if (wpa_supplicant_driver_init(wpa_s) < 0)
2339 return -1;
2341 #ifdef CONFIG_TDLS
2342 if (wpa_tdls_init(wpa_s->wpa))
2343 return -1;
2344 #endif /* CONFIG_TDLS */
2346 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2347 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2348 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2349 return -1;
2350 }
2352 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2354 if (wpas_wps_init(wpa_s))
2355 return -1;
2357 if (wpa_supplicant_init_eapol(wpa_s) < 0)
2358 return -1;
2359 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2361 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2362 if (wpa_s->ctrl_iface == NULL) {
2363 wpa_printf(MSG_ERROR,
2364 "Failed to initialize control interface '%s'.\n"
2365 "You may have another wpa_supplicant process "
2366 "already running or the file was\n"
2367 "left by an unclean termination of wpa_supplicant "
2368 "in which case you will need\n"
2369 "to manually remove this file before starting "
2370 "wpa_supplicant again.\n",
2371 wpa_s->conf->ctrl_interface);
2372 return -1;
2373 }
2375 wpa_s->gas = gas_query_init(wpa_s);
2376 if (wpa_s->gas == NULL) {
2377 wpa_printf(MSG_ERROR, "Failed to initialize GAS query");
2378 return -1;
2379 }
2381 #ifdef CONFIG_P2P
2382 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2383 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2384 return -1;
2385 }
2386 #endif /* CONFIG_P2P */
2388 if (wpa_bss_init(wpa_s) < 0)
2389 return -1;
2391 return 0;
2392 }
2395 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2396 int notify)
2397 {
2398 if (wpa_s->drv_priv) {
2399 wpa_supplicant_deauthenticate(wpa_s,
2400 WLAN_REASON_DEAUTH_LEAVING);
2402 wpa_drv_set_countermeasures(wpa_s, 0);
2403 wpa_clear_keys(wpa_s, NULL);
2404 }
2406 wpa_supplicant_cleanup(wpa_s);
2408 if (notify)
2409 wpas_notify_iface_removed(wpa_s);
2411 if (wpa_s->drv_priv)
2412 wpa_drv_deinit(wpa_s);
2413 }
2416 /**
2417 * wpa_supplicant_add_iface - Add a new network interface
2418 * @global: Pointer to global data from wpa_supplicant_init()
2419 * @iface: Interface configuration options
2420 * Returns: Pointer to the created interface or %NULL on failure
2421 *
2422 * This function is used to add new network interfaces for %wpa_supplicant.
2423 * This can be called before wpa_supplicant_run() to add interfaces before the
2424 * main event loop has been started. In addition, new interfaces can be added
2425 * dynamically while %wpa_supplicant is already running. This could happen,
2426 * e.g., when a hotplug network adapter is inserted.
2427 */
2428 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2429 struct wpa_interface *iface)
2430 {
2431 struct wpa_supplicant *wpa_s;
2432 struct wpa_interface t_iface;
2433 struct wpa_ssid *ssid;
2435 if (global == NULL || iface == NULL)
2436 return NULL;
2438 wpa_s = wpa_supplicant_alloc();
2439 if (wpa_s == NULL)
2440 return NULL;
2442 wpa_s->global = global;
2444 t_iface = *iface;
2445 if (global->params.override_driver) {
2446 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2447 "('%s' -> '%s')",
2448 iface->driver, global->params.override_driver);
2449 t_iface.driver = global->params.override_driver;
2450 }
2451 if (global->params.override_ctrl_interface) {
2452 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2453 "ctrl_interface ('%s' -> '%s')",
2454 iface->ctrl_interface,
2455 global->params.override_ctrl_interface);
2456 t_iface.ctrl_interface =
2457 global->params.override_ctrl_interface;
2458 }
2459 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2460 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2461 iface->ifname);
2462 wpa_supplicant_deinit_iface(wpa_s, 0);
2463 os_free(wpa_s);
2464 return NULL;
2465 }
2467 /* Notify the control interfaces about new iface */
2468 if (wpas_notify_iface_added(wpa_s)) {
2469 wpa_supplicant_deinit_iface(wpa_s, 1);
2470 os_free(wpa_s);
2471 return NULL;
2472 }
2474 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2475 wpas_notify_network_added(wpa_s, ssid);
2477 wpa_s->next = global->ifaces;
2478 global->ifaces = wpa_s;
2480 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2482 return wpa_s;
2483 }
2486 /**
2487 * wpa_supplicant_remove_iface - Remove a network interface
2488 * @global: Pointer to global data from wpa_supplicant_init()
2489 * @wpa_s: Pointer to the network interface to be removed
2490 * Returns: 0 if interface was removed, -1 if interface was not found
2491 *
2492 * This function can be used to dynamically remove network interfaces from
2493 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2494 * addition, this function is used to remove all remaining interfaces when
2495 * %wpa_supplicant is terminated.
2496 */
2497 int wpa_supplicant_remove_iface(struct wpa_global *global,
2498 struct wpa_supplicant *wpa_s)
2499 {
2500 struct wpa_supplicant *prev;
2502 /* Remove interface from the global list of interfaces */
2503 prev = global->ifaces;
2504 if (prev == wpa_s) {
2505 global->ifaces = wpa_s->next;
2506 } else {
2507 while (prev && prev->next != wpa_s)
2508 prev = prev->next;
2509 if (prev == NULL)
2510 return -1;
2511 prev->next = wpa_s->next;
2512 }
2514 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2516 if (global->p2p_group_formation == wpa_s)
2517 global->p2p_group_formation = NULL;
2518 wpa_supplicant_deinit_iface(wpa_s, 1);
2519 os_free(wpa_s);
2521 return 0;
2522 }
2525 /**
2526 * wpa_supplicant_get_eap_mode - Get the current EAP mode
2527 * @wpa_s: Pointer to the network interface
2528 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2529 */
2530 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2531 {
2532 const char *eapol_method;
2534 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2535 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2536 return "NO-EAP";
2537 }
2539 eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2540 if (eapol_method == NULL)
2541 return "UNKNOWN-EAP";
2543 return eapol_method;
2544 }
2547 /**
2548 * wpa_supplicant_get_iface - Get a new network interface
2549 * @global: Pointer to global data from wpa_supplicant_init()
2550 * @ifname: Interface name
2551 * Returns: Pointer to the interface or %NULL if not found
2552 */
2553 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2554 const char *ifname)
2555 {
2556 struct wpa_supplicant *wpa_s;
2558 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2559 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2560 return wpa_s;
2561 }
2562 return NULL;
2563 }
2566 #ifndef CONFIG_NO_WPA_MSG
2567 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2568 {
2569 struct wpa_supplicant *wpa_s = ctx;
2570 if (wpa_s == NULL)
2571 return NULL;
2572 return wpa_s->ifname;
2573 }
2574 #endif /* CONFIG_NO_WPA_MSG */
2577 /**
2578 * wpa_supplicant_init - Initialize %wpa_supplicant
2579 * @params: Parameters for %wpa_supplicant
2580 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2581 *
2582 * This function is used to initialize %wpa_supplicant. After successful
2583 * initialization, the returned data pointer can be used to add and remove
2584 * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2585 */
2586 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2587 {
2588 struct wpa_global *global;
2589 int ret, i;
2591 if (params == NULL)
2592 return NULL;
2594 #ifdef CONFIG_DRIVER_NDIS
2595 {
2596 void driver_ndis_init_ops(void);
2597 driver_ndis_init_ops();
2598 }
2599 #endif /* CONFIG_DRIVER_NDIS */
2601 #ifndef CONFIG_NO_WPA_MSG
2602 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2603 #endif /* CONFIG_NO_WPA_MSG */
2605 wpa_debug_open_file(params->wpa_debug_file_path);
2606 if (params->wpa_debug_syslog)
2607 wpa_debug_open_syslog();
2609 ret = eap_register_methods();
2610 if (ret) {
2611 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2612 if (ret == -2)
2613 wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2614 "the same EAP type.");
2615 return NULL;
2616 }
2618 global = os_zalloc(sizeof(*global));
2619 if (global == NULL)
2620 return NULL;
2621 dl_list_init(&global->p2p_srv_bonjour);
2622 dl_list_init(&global->p2p_srv_upnp);
2623 global->params.daemonize = params->daemonize;
2624 global->params.wait_for_monitor = params->wait_for_monitor;
2625 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2626 if (params->pid_file)
2627 global->params.pid_file = os_strdup(params->pid_file);
2628 if (params->ctrl_interface)
2629 global->params.ctrl_interface =
2630 os_strdup(params->ctrl_interface);
2631 if (params->override_driver)
2632 global->params.override_driver =
2633 os_strdup(params->override_driver);
2634 if (params->override_ctrl_interface)
2635 global->params.override_ctrl_interface =
2636 os_strdup(params->override_ctrl_interface);
2637 wpa_debug_level = global->params.wpa_debug_level =
2638 params->wpa_debug_level;
2639 wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2640 params->wpa_debug_show_keys;
2641 wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2642 params->wpa_debug_timestamp;
2644 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2646 if (eloop_init()) {
2647 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2648 wpa_supplicant_deinit(global);
2649 return NULL;
2650 }
2652 random_init(params->entropy_file);
2654 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2655 if (global->ctrl_iface == NULL) {
2656 wpa_supplicant_deinit(global);
2657 return NULL;
2658 }
2660 if (wpas_notify_supplicant_initialized(global)) {
2661 wpa_supplicant_deinit(global);
2662 return NULL;
2663 }
2665 for (i = 0; wpa_drivers[i]; i++)
2666 global->drv_count++;
2667 if (global->drv_count == 0) {
2668 wpa_printf(MSG_ERROR, "No drivers enabled");
2669 wpa_supplicant_deinit(global);
2670 return NULL;
2671 }
2672 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2673 if (global->drv_priv == NULL) {
2674 wpa_supplicant_deinit(global);
2675 return NULL;
2676 }
2678 return global;
2679 }
2682 /**
2683 * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2684 * @global: Pointer to global data from wpa_supplicant_init()
2685 * Returns: 0 after successful event loop run, -1 on failure
2686 *
2687 * This function starts the main event loop and continues running as long as
2688 * there are any remaining events. In most cases, this function is running as
2689 * long as the %wpa_supplicant process in still in use.
2690 */
2691 int wpa_supplicant_run(struct wpa_global *global)
2692 {
2693 struct wpa_supplicant *wpa_s;
2695 if (global->params.daemonize &&
2696 wpa_supplicant_daemon(global->params.pid_file))
2697 return -1;
2699 if (global->params.wait_for_monitor) {
2700 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2701 if (wpa_s->ctrl_iface)
2702 wpa_supplicant_ctrl_iface_wait(
2703 wpa_s->ctrl_iface);
2704 }
2706 eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2707 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2709 eloop_run();
2711 return 0;
2712 }
2715 /**
2716 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2717 * @global: Pointer to global data from wpa_supplicant_init()
2718 *
2719 * This function is called to deinitialize %wpa_supplicant and to free all
2720 * allocated resources. Remaining network interfaces will also be removed.
2721 */
2722 void wpa_supplicant_deinit(struct wpa_global *global)
2723 {
2724 int i;
2726 if (global == NULL)
2727 return;
2729 #ifdef CONFIG_P2P
2730 wpas_p2p_deinit_global(global);
2731 #endif /* CONFIG_P2P */
2733 while (global->ifaces)
2734 wpa_supplicant_remove_iface(global, global->ifaces);
2736 if (global->ctrl_iface)
2737 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2739 wpas_notify_supplicant_deinitialized(global);
2741 eap_peer_unregister_methods();
2742 #ifdef CONFIG_AP
2743 eap_server_unregister_methods();
2744 #endif /* CONFIG_AP */
2746 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2747 if (!global->drv_priv[i])
2748 continue;
2749 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2750 }
2751 os_free(global->drv_priv);
2753 random_deinit();
2755 eloop_destroy();
2757 if (global->params.pid_file) {
2758 os_daemonize_terminate(global->params.pid_file);
2759 os_free(global->params.pid_file);
2760 }
2761 os_free(global->params.ctrl_interface);
2762 os_free(global->params.override_driver);
2763 os_free(global->params.override_ctrl_interface);
2765 os_free(global);
2766 wpa_debug_close_syslog();
2767 wpa_debug_close_file();
2768 }
2771 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2772 {
2773 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
2774 wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
2775 char country[3];
2776 country[0] = wpa_s->conf->country[0];
2777 country[1] = wpa_s->conf->country[1];
2778 country[2] = '\0';
2779 if (wpa_drv_set_country(wpa_s, country) < 0) {
2780 wpa_printf(MSG_ERROR, "Failed to set country code "
2781 "'%s'", country);
2782 }
2783 }
2785 #ifdef CONFIG_WPS
2786 wpas_wps_update_config(wpa_s);
2787 #endif /* CONFIG_WPS */
2789 #ifdef CONFIG_P2P
2790 wpas_p2p_update_config(wpa_s);
2791 #endif /* CONFIG_P2P */
2793 wpa_s->conf->changed_parameters = 0;
2794 }
2797 static void add_freq(int *freqs, int *num_freqs, int freq)
2798 {
2799 int i;
2801 for (i = 0; i < *num_freqs; i++) {
2802 if (freqs[i] == freq)
2803 return;
2804 }
2806 freqs[*num_freqs] = freq;
2807 (*num_freqs)++;
2808 }
2811 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
2812 {
2813 struct wpa_bss *bss, *cbss;
2814 const int max_freqs = 10;
2815 int *freqs;
2816 int num_freqs = 0;
2818 freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
2819 if (freqs == NULL)
2820 return NULL;
2822 cbss = wpa_s->current_bss;
2824 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2825 if (bss == cbss)
2826 continue;
2827 if (bss->ssid_len == cbss->ssid_len &&
2828 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
2829 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
2830 add_freq(freqs, &num_freqs, bss->freq);
2831 if (num_freqs == max_freqs)
2832 break;
2833 }
2834 }
2836 if (num_freqs == 0) {
2837 os_free(freqs);
2838 freqs = NULL;
2839 }
2841 return freqs;
2842 }
2845 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
2846 {
2847 int timeout;
2848 int count;
2849 int *freqs = NULL;
2851 /*
2852 * Add the failed BSSID into the blacklist and speed up next scan
2853 * attempt if there could be other APs that could accept association.
2854 * The current blacklist count indicates how many times we have tried
2855 * connecting to this AP and multiple attempts mean that other APs are
2856 * either not available or has already been tried, so that we can start
2857 * increasing the delay here to avoid constant scanning.
2858 */
2859 count = wpa_blacklist_add(wpa_s, bssid);
2860 if (count == 1 && wpa_s->current_bss) {
2861 /*
2862 * This BSS was not in the blacklist before. If there is
2863 * another BSS available for the same ESS, we should try that
2864 * next. Otherwise, we may as well try this one once more
2865 * before allowing other, likely worse, ESSes to be considered.
2866 */
2867 freqs = get_bss_freqs_in_ess(wpa_s);
2868 if (freqs) {
2869 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
2870 "has been seen; try it next");
2871 wpa_blacklist_add(wpa_s, bssid);
2872 /*
2873 * On the next scan, go through only the known channels
2874 * used in this ESS based on previous scans to speed up
2875 * common load balancing use case.
2876 */
2877 os_free(wpa_s->next_scan_freqs);
2878 wpa_s->next_scan_freqs = freqs;
2879 }
2880 }
2882 switch (count) {
2883 case 1:
2884 timeout = 100;
2885 break;
2886 case 2:
2887 timeout = 500;
2888 break;
2889 case 3:
2890 timeout = 1000;
2891 break;
2892 default:
2893 timeout = 5000;
2894 }
2896 /*
2897 * TODO: if more than one possible AP is available in scan results,
2898 * could try the other ones before requesting a new scan.
2899 */
2900 wpa_supplicant_req_scan(wpa_s, timeout / 1000,
2901 1000 * (timeout % 1000));
2902 }
2905 int wpas_driver_bss_selection(struct wpa_supplicant *wpa_s)
2906 {
2907 return wpa_s->conf->ap_scan == 2 ||
2908 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION);
2909 }