1 /*
2 * WPA Supplicant
3 * Copyright (c) 2003-2012, 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->conf != NULL) {
404 struct wpa_ssid *ssid;
405 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
406 wpas_notify_network_removed(wpa_s, ssid);
407 }
409 os_free(wpa_s->confname);
410 wpa_s->confname = NULL;
412 wpa_sm_set_eapol(wpa_s->wpa, NULL);
413 eapol_sm_deinit(wpa_s->eapol);
414 wpa_s->eapol = NULL;
416 rsn_preauth_deinit(wpa_s->wpa);
418 #ifdef CONFIG_TDLS
419 wpa_tdls_deinit(wpa_s->wpa);
420 #endif /* CONFIG_TDLS */
422 pmksa_candidate_free(wpa_s->wpa);
423 wpa_sm_deinit(wpa_s->wpa);
424 wpa_s->wpa = NULL;
425 wpa_blacklist_clear(wpa_s);
427 wpa_bss_deinit(wpa_s);
429 wpa_supplicant_cancel_scan(wpa_s);
430 wpa_supplicant_cancel_auth_timeout(wpa_s);
431 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, wpa_s, NULL);
432 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
433 eloop_cancel_timeout(wpa_supplicant_delayed_mic_error_report,
434 wpa_s, NULL);
435 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
437 wpas_wps_deinit(wpa_s);
439 wpabuf_free(wpa_s->pending_eapol_rx);
440 wpa_s->pending_eapol_rx = NULL;
442 #ifdef CONFIG_IBSS_RSN
443 ibss_rsn_deinit(wpa_s->ibss_rsn);
444 wpa_s->ibss_rsn = NULL;
445 #endif /* CONFIG_IBSS_RSN */
447 sme_deinit(wpa_s);
449 #ifdef CONFIG_AP
450 wpa_supplicant_ap_deinit(wpa_s);
451 #endif /* CONFIG_AP */
453 #ifdef CONFIG_P2P
454 wpas_p2p_deinit(wpa_s);
455 #endif /* CONFIG_P2P */
457 #ifdef CONFIG_OFFCHANNEL
458 offchannel_deinit(wpa_s);
459 #endif /* CONFIG_OFFCHANNEL */
461 wpa_supplicant_cancel_sched_scan(wpa_s);
463 os_free(wpa_s->next_scan_freqs);
464 wpa_s->next_scan_freqs = NULL;
466 gas_query_deinit(wpa_s->gas);
467 wpa_s->gas = NULL;
469 free_hw_features(wpa_s);
470 }
473 /**
474 * wpa_clear_keys - Clear keys configured for the driver
475 * @wpa_s: Pointer to wpa_supplicant data
476 * @addr: Previously used BSSID or %NULL if not available
477 *
478 * This function clears the encryption keys that has been previously configured
479 * for the driver.
480 */
481 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
482 {
483 if (wpa_s->keys_cleared) {
484 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
485 * timing issues with keys being cleared just before new keys
486 * are set or just after association or something similar. This
487 * shows up in group key handshake failing often because of the
488 * client not receiving the first encrypted packets correctly.
489 * Skipping some of the extra key clearing steps seems to help
490 * in completing group key handshake more reliably. */
491 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - "
492 "skip key clearing");
493 return;
494 }
496 /* MLME-DELETEKEYS.request */
497 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0);
498 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0);
499 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0);
500 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0);
501 #ifdef CONFIG_IEEE80211W
502 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0);
503 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0);
504 #endif /* CONFIG_IEEE80211W */
505 if (addr) {
506 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
507 0);
508 /* MLME-SETPROTECTION.request(None) */
509 wpa_drv_mlme_setprotection(
510 wpa_s, addr,
511 MLME_SETPROTECTION_PROTECT_TYPE_NONE,
512 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
513 }
514 wpa_s->keys_cleared = 1;
515 }
518 /**
519 * wpa_supplicant_state_txt - Get the connection state name as a text string
520 * @state: State (wpa_state; WPA_*)
521 * Returns: The state name as a printable text string
522 */
523 const char * wpa_supplicant_state_txt(enum wpa_states state)
524 {
525 switch (state) {
526 case WPA_DISCONNECTED:
527 return "DISCONNECTED";
528 case WPA_INACTIVE:
529 return "INACTIVE";
530 case WPA_INTERFACE_DISABLED:
531 return "INTERFACE_DISABLED";
532 case WPA_SCANNING:
533 return "SCANNING";
534 case WPA_AUTHENTICATING:
535 return "AUTHENTICATING";
536 case WPA_ASSOCIATING:
537 return "ASSOCIATING";
538 case WPA_ASSOCIATED:
539 return "ASSOCIATED";
540 case WPA_4WAY_HANDSHAKE:
541 return "4WAY_HANDSHAKE";
542 case WPA_GROUP_HANDSHAKE:
543 return "GROUP_HANDSHAKE";
544 case WPA_COMPLETED:
545 return "COMPLETED";
546 default:
547 return "UNKNOWN";
548 }
549 }
552 #ifdef CONFIG_BGSCAN
554 static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s)
555 {
556 if (wpas_driver_bss_selection(wpa_s))
557 return;
558 if (wpa_s->current_ssid == wpa_s->bgscan_ssid)
559 return;
561 bgscan_deinit(wpa_s);
562 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
563 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
564 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
565 "bgscan");
566 /*
567 * Live without bgscan; it is only used as a roaming
568 * optimization, so the initial connection is not
569 * affected.
570 */
571 } else
572 wpa_s->bgscan_ssid = wpa_s->current_ssid;
573 } else
574 wpa_s->bgscan_ssid = NULL;
575 }
578 static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s)
579 {
580 if (wpa_s->bgscan_ssid != NULL) {
581 bgscan_deinit(wpa_s);
582 wpa_s->bgscan_ssid = NULL;
583 }
584 }
586 #endif /* CONFIG_BGSCAN */
589 /**
590 * wpa_supplicant_set_state - Set current connection state
591 * @wpa_s: Pointer to wpa_supplicant data
592 * @state: The new connection state
593 *
594 * This function is called whenever the connection state changes, e.g.,
595 * association is completed for WPA/WPA2 4-Way Handshake is started.
596 */
597 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
598 enum wpa_states state)
599 {
600 enum wpa_states old_state = wpa_s->wpa_state;
602 wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s",
603 wpa_supplicant_state_txt(wpa_s->wpa_state),
604 wpa_supplicant_state_txt(state));
606 if (state != WPA_SCANNING)
607 wpa_supplicant_notify_scanning(wpa_s, 0);
609 if (state == WPA_COMPLETED && wpa_s->new_connection) {
610 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
611 struct wpa_ssid *ssid = wpa_s->current_ssid;
612 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
613 MACSTR " completed %s [id=%d id_str=%s]",
614 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
615 "(reauth)" : "(auth)",
616 ssid ? ssid->id : -1,
617 ssid && ssid->id_str ? ssid->id_str : "");
618 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
619 wpa_s->new_connection = 0;
620 wpa_s->reassociated_connection = 1;
621 wpa_drv_set_operstate(wpa_s, 1);
622 #ifndef IEEE8021X_EAPOL
623 wpa_drv_set_supp_port(wpa_s, 1);
624 #endif /* IEEE8021X_EAPOL */
625 wpa_s->after_wps = 0;
626 #ifdef CONFIG_P2P
627 wpas_p2p_completed(wpa_s);
628 #endif /* CONFIG_P2P */
629 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
630 state == WPA_ASSOCIATED) {
631 wpa_s->new_connection = 1;
632 wpa_drv_set_operstate(wpa_s, 0);
633 #ifndef IEEE8021X_EAPOL
634 wpa_drv_set_supp_port(wpa_s, 0);
635 #endif /* IEEE8021X_EAPOL */
636 }
637 wpa_s->wpa_state = state;
639 #ifdef CONFIG_BGSCAN
640 if (state == WPA_COMPLETED)
641 wpa_supplicant_start_bgscan(wpa_s);
642 else
643 wpa_supplicant_stop_bgscan(wpa_s);
644 #endif /* CONFIG_BGSCAN */
646 if (wpa_s->wpa_state != old_state) {
647 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
649 if (wpa_s->wpa_state == WPA_COMPLETED ||
650 old_state == WPA_COMPLETED)
651 wpas_notify_auth_changed(wpa_s);
652 }
653 }
656 void wpa_supplicant_terminate_proc(struct wpa_global *global)
657 {
658 int pending = 0;
659 #ifdef CONFIG_WPS
660 struct wpa_supplicant *wpa_s = global->ifaces;
661 while (wpa_s) {
662 if (wpas_wps_terminate_pending(wpa_s) == 1)
663 pending = 1;
664 wpa_s = wpa_s->next;
665 }
666 #endif /* CONFIG_WPS */
667 if (pending)
668 return;
669 eloop_terminate();
670 }
673 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
674 {
675 struct wpa_global *global = signal_ctx;
676 wpa_supplicant_terminate_proc(global);
677 }
680 void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
681 {
682 enum wpa_states old_state = wpa_s->wpa_state;
684 wpa_s->pairwise_cipher = 0;
685 wpa_s->group_cipher = 0;
686 wpa_s->mgmt_group_cipher = 0;
687 wpa_s->key_mgmt = 0;
688 if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED)
689 wpa_s->wpa_state = WPA_DISCONNECTED;
691 if (wpa_s->wpa_state != old_state)
692 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
693 }
696 /**
697 * wpa_supplicant_reload_configuration - Reload configuration data
698 * @wpa_s: Pointer to wpa_supplicant data
699 * Returns: 0 on success or -1 if configuration parsing failed
700 *
701 * This function can be used to request that the configuration data is reloaded
702 * (e.g., after configuration file change). This function is reloading
703 * configuration only for one interface, so this may need to be called multiple
704 * times if %wpa_supplicant is controlling multiple interfaces and all
705 * interfaces need reconfiguration.
706 */
707 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
708 {
709 struct wpa_config *conf;
710 int reconf_ctrl;
711 int old_ap_scan;
713 if (wpa_s->confname == NULL)
714 return -1;
715 conf = wpa_config_read(wpa_s->confname);
716 if (conf == NULL) {
717 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
718 "file '%s' - exiting", wpa_s->confname);
719 return -1;
720 }
721 conf->changed_parameters = (unsigned int) -1;
723 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
724 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
725 os_strcmp(conf->ctrl_interface,
726 wpa_s->conf->ctrl_interface) != 0);
728 if (reconf_ctrl && wpa_s->ctrl_iface) {
729 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
730 wpa_s->ctrl_iface = NULL;
731 }
733 eapol_sm_invalidate_cached_session(wpa_s->eapol);
734 if (wpa_s->current_ssid) {
735 wpa_supplicant_deauthenticate(wpa_s,
736 WLAN_REASON_DEAUTH_LEAVING);
737 }
739 /*
740 * TODO: should notify EAPOL SM about changes in opensc_engine_path,
741 * pkcs11_engine_path, pkcs11_module_path.
742 */
743 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
744 /*
745 * Clear forced success to clear EAP state for next
746 * authentication.
747 */
748 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
749 }
750 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
751 wpa_sm_set_config(wpa_s->wpa, NULL);
752 wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL);
753 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
754 rsn_preauth_deinit(wpa_s->wpa);
756 old_ap_scan = wpa_s->conf->ap_scan;
757 wpa_config_free(wpa_s->conf);
758 wpa_s->conf = conf;
759 if (old_ap_scan != wpa_s->conf->ap_scan)
760 wpas_notify_ap_scan_changed(wpa_s);
762 if (reconf_ctrl)
763 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
765 wpa_supplicant_update_config(wpa_s);
767 wpa_supplicant_clear_status(wpa_s);
768 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
769 wpa_s->reassociate = 1;
770 wpa_supplicant_req_scan(wpa_s, 0, 0);
771 }
772 wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
773 return 0;
774 }
777 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
778 {
779 struct wpa_global *global = signal_ctx;
780 struct wpa_supplicant *wpa_s;
781 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
782 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring",
783 sig);
784 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
785 wpa_supplicant_terminate_proc(global);
786 }
787 }
788 }
791 enum wpa_cipher cipher_suite2driver(int cipher)
792 {
793 switch (cipher) {
794 case WPA_CIPHER_NONE:
795 return CIPHER_NONE;
796 case WPA_CIPHER_WEP40:
797 return CIPHER_WEP40;
798 case WPA_CIPHER_WEP104:
799 return CIPHER_WEP104;
800 case WPA_CIPHER_CCMP:
801 return CIPHER_CCMP;
802 case WPA_CIPHER_TKIP:
803 default:
804 return CIPHER_TKIP;
805 }
806 }
809 enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
810 {
811 switch (key_mgmt) {
812 case WPA_KEY_MGMT_NONE:
813 return KEY_MGMT_NONE;
814 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
815 return KEY_MGMT_802_1X_NO_WPA;
816 case WPA_KEY_MGMT_IEEE8021X:
817 return KEY_MGMT_802_1X;
818 case WPA_KEY_MGMT_WPA_NONE:
819 return KEY_MGMT_WPA_NONE;
820 case WPA_KEY_MGMT_FT_IEEE8021X:
821 return KEY_MGMT_FT_802_1X;
822 case WPA_KEY_MGMT_FT_PSK:
823 return KEY_MGMT_FT_PSK;
824 case WPA_KEY_MGMT_IEEE8021X_SHA256:
825 return KEY_MGMT_802_1X_SHA256;
826 case WPA_KEY_MGMT_PSK_SHA256:
827 return KEY_MGMT_PSK_SHA256;
828 case WPA_KEY_MGMT_WPS:
829 return KEY_MGMT_WPS;
830 case WPA_KEY_MGMT_PSK:
831 default:
832 return KEY_MGMT_PSK;
833 }
834 }
837 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
838 struct wpa_ssid *ssid,
839 struct wpa_ie_data *ie)
840 {
841 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
842 if (ret) {
843 if (ret == -2) {
844 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
845 "from association info");
846 }
847 return -1;
848 }
850 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set "
851 "cipher suites");
852 if (!(ie->group_cipher & ssid->group_cipher)) {
853 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
854 "cipher 0x%x (mask 0x%x) - reject",
855 ie->group_cipher, ssid->group_cipher);
856 return -1;
857 }
858 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
859 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
860 "cipher 0x%x (mask 0x%x) - reject",
861 ie->pairwise_cipher, ssid->pairwise_cipher);
862 return -1;
863 }
864 if (!(ie->key_mgmt & ssid->key_mgmt)) {
865 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
866 "management 0x%x (mask 0x%x) - reject",
867 ie->key_mgmt, ssid->key_mgmt);
868 return -1;
869 }
871 #ifdef CONFIG_IEEE80211W
872 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
873 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
874 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
875 "that does not support management frame protection - "
876 "reject");
877 return -1;
878 }
879 #endif /* CONFIG_IEEE80211W */
881 return 0;
882 }
885 /**
886 * wpa_supplicant_set_suites - Set authentication and encryption parameters
887 * @wpa_s: Pointer to wpa_supplicant data
888 * @bss: Scan results for the selected BSS, or %NULL if not available
889 * @ssid: Configuration data for the selected network
890 * @wpa_ie: Buffer for the WPA/RSN IE
891 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
892 * used buffer length in case the functions returns success.
893 * Returns: 0 on success or -1 on failure
894 *
895 * This function is used to configure authentication and encryption parameters
896 * based on the network configuration and scan result for the selected BSS (if
897 * available).
898 */
899 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
900 struct wpa_bss *bss, struct wpa_ssid *ssid,
901 u8 *wpa_ie, size_t *wpa_ie_len)
902 {
903 struct wpa_ie_data ie;
904 int sel, proto;
905 const u8 *bss_wpa, *bss_rsn;
907 if (bss) {
908 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
909 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
910 } else
911 bss_wpa = bss_rsn = NULL;
913 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
914 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
915 (ie.group_cipher & ssid->group_cipher) &&
916 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
917 (ie.key_mgmt & ssid->key_mgmt)) {
918 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
919 proto = WPA_PROTO_RSN;
920 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
921 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
922 (ie.group_cipher & ssid->group_cipher) &&
923 (ie.pairwise_cipher & ssid->pairwise_cipher) &&
924 (ie.key_mgmt & ssid->key_mgmt)) {
925 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
926 proto = WPA_PROTO_WPA;
927 } else if (bss) {
928 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
929 return -1;
930 } else {
931 if (ssid->proto & WPA_PROTO_RSN)
932 proto = WPA_PROTO_RSN;
933 else
934 proto = WPA_PROTO_WPA;
935 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
936 os_memset(&ie, 0, sizeof(ie));
937 ie.group_cipher = ssid->group_cipher;
938 ie.pairwise_cipher = ssid->pairwise_cipher;
939 ie.key_mgmt = ssid->key_mgmt;
940 #ifdef CONFIG_IEEE80211W
941 ie.mgmt_group_cipher =
942 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
943 WPA_CIPHER_AES_128_CMAC : 0;
944 #endif /* CONFIG_IEEE80211W */
945 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites "
946 "based on configuration");
947 } else
948 proto = ie.proto;
949 }
951 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d "
952 "pairwise %d key_mgmt %d proto %d",
953 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
954 #ifdef CONFIG_IEEE80211W
955 if (ssid->ieee80211w) {
956 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
957 ie.mgmt_group_cipher);
958 }
959 #endif /* CONFIG_IEEE80211W */
961 wpa_s->wpa_proto = proto;
962 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
963 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
964 !!(ssid->proto & WPA_PROTO_RSN));
966 if (bss || !wpa_s->ap_ies_from_associnfo) {
967 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
968 bss_wpa ? 2 + bss_wpa[1] : 0) ||
969 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
970 bss_rsn ? 2 + bss_rsn[1] : 0))
971 return -1;
972 }
974 sel = ie.group_cipher & ssid->group_cipher;
975 if (sel & WPA_CIPHER_CCMP) {
976 wpa_s->group_cipher = WPA_CIPHER_CCMP;
977 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
978 } else if (sel & WPA_CIPHER_TKIP) {
979 wpa_s->group_cipher = WPA_CIPHER_TKIP;
980 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
981 } else if (sel & WPA_CIPHER_WEP104) {
982 wpa_s->group_cipher = WPA_CIPHER_WEP104;
983 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
984 } else if (sel & WPA_CIPHER_WEP40) {
985 wpa_s->group_cipher = WPA_CIPHER_WEP40;
986 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
987 } else {
988 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group "
989 "cipher");
990 return -1;
991 }
993 sel = ie.pairwise_cipher & ssid->pairwise_cipher;
994 if (sel & WPA_CIPHER_CCMP) {
995 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
996 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
997 } else if (sel & WPA_CIPHER_TKIP) {
998 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
999 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
1000 } else if (sel & WPA_CIPHER_NONE) {
1001 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
1002 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
1003 } else {
1004 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise "
1005 "cipher");
1006 return -1;
1007 }
1009 sel = ie.key_mgmt & ssid->key_mgmt;
1010 if (0) {
1011 #ifdef CONFIG_IEEE80211R
1012 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
1013 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
1014 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
1015 } else if (sel & WPA_KEY_MGMT_FT_PSK) {
1016 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
1017 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
1018 #endif /* CONFIG_IEEE80211R */
1019 #ifdef CONFIG_IEEE80211W
1020 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
1021 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
1022 wpa_dbg(wpa_s, MSG_DEBUG,
1023 "WPA: using KEY_MGMT 802.1X with SHA256");
1024 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
1025 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
1026 wpa_dbg(wpa_s, MSG_DEBUG,
1027 "WPA: using KEY_MGMT PSK with SHA256");
1028 #endif /* CONFIG_IEEE80211W */
1029 } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
1030 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1031 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
1032 } else if (sel & WPA_KEY_MGMT_PSK) {
1033 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
1034 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
1035 } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
1036 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
1037 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
1038 } else {
1039 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select "
1040 "authenticated key management type");
1041 return -1;
1042 }
1044 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
1045 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
1046 wpa_s->pairwise_cipher);
1047 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
1049 #ifdef CONFIG_IEEE80211W
1050 sel = ie.mgmt_group_cipher;
1051 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
1052 !(ie.capabilities & WPA_CAPABILITY_MFPC))
1053 sel = 0;
1054 if (sel & WPA_CIPHER_AES_128_CMAC) {
1055 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1056 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
1057 "AES-128-CMAC");
1058 } else {
1059 wpa_s->mgmt_group_cipher = 0;
1060 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
1061 }
1062 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
1063 wpa_s->mgmt_group_cipher);
1064 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
1065 #endif /* CONFIG_IEEE80211W */
1067 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
1068 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE");
1069 return -1;
1070 }
1072 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt)) {
1073 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1074 #ifndef CONFIG_NO_PBKDF2
1075 if (bss && ssid->bssid_set && ssid->ssid_len == 0 &&
1076 ssid->passphrase) {
1077 u8 psk[PMK_LEN];
1078 pbkdf2_sha1(ssid->passphrase, (char *) bss->ssid,
1079 bss->ssid_len, 4096, psk, PMK_LEN);
1080 wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
1081 psk, PMK_LEN);
1082 wpa_sm_set_pmk(wpa_s->wpa, psk, PMK_LEN);
1083 }
1084 #endif /* CONFIG_NO_PBKDF2 */
1085 } else
1086 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1088 return 0;
1089 }
1092 /**
1093 * wpa_supplicant_associate - Request association
1094 * @wpa_s: Pointer to wpa_supplicant data
1095 * @bss: Scan results for the selected BSS, or %NULL if not available
1096 * @ssid: Configuration data for the selected network
1097 *
1098 * This function is used to request %wpa_supplicant to associate with a BSS.
1099 */
1100 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1101 struct wpa_bss *bss, struct wpa_ssid *ssid)
1102 {
1103 u8 wpa_ie[200];
1104 size_t wpa_ie_len;
1105 int use_crypt, ret, i, bssid_changed;
1106 int algs = WPA_AUTH_ALG_OPEN;
1107 enum wpa_cipher cipher_pairwise, cipher_group;
1108 struct wpa_driver_associate_params params;
1109 int wep_keys_set = 0;
1110 struct wpa_driver_capa capa;
1111 int assoc_failed = 0;
1112 struct wpa_ssid *old_ssid;
1113 #ifdef CONFIG_HT_OVERRIDES
1114 struct ieee80211_ht_capabilities htcaps;
1115 struct ieee80211_ht_capabilities htcaps_mask;
1116 #endif /* CONFIG_HT_OVERRIDES */
1118 #ifdef CONFIG_IBSS_RSN
1119 ibss_rsn_deinit(wpa_s->ibss_rsn);
1120 wpa_s->ibss_rsn = NULL;
1121 #endif /* CONFIG_IBSS_RSN */
1123 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1124 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1125 #ifdef CONFIG_AP
1126 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1127 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1128 "mode");
1129 return;
1130 }
1131 wpa_supplicant_create_ap(wpa_s, ssid);
1132 wpa_s->current_bss = bss;
1133 #else /* CONFIG_AP */
1134 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1135 "the build");
1136 #endif /* CONFIG_AP */
1137 return;
1138 }
1140 #ifdef CONFIG_TDLS
1141 if (bss)
1142 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
1143 bss->ie_len);
1144 #endif /* CONFIG_TDLS */
1146 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1147 ssid->mode == IEEE80211_MODE_INFRA) {
1148 sme_authenticate(wpa_s, bss, ssid);
1149 return;
1150 }
1152 os_memset(¶ms, 0, sizeof(params));
1153 wpa_s->reassociate = 0;
1154 if (bss && !wpas_driver_bss_selection(wpa_s)) {
1155 #ifdef CONFIG_IEEE80211R
1156 const u8 *ie, *md = NULL;
1157 #endif /* CONFIG_IEEE80211R */
1158 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1159 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1160 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1161 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1162 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1163 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1164 if (bssid_changed)
1165 wpas_notify_bssid_changed(wpa_s);
1166 #ifdef CONFIG_IEEE80211R
1167 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1168 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1169 md = ie + 2;
1170 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1171 if (md) {
1172 /* Prepare for the next transition */
1173 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1174 }
1175 #endif /* CONFIG_IEEE80211R */
1176 #ifdef CONFIG_WPS
1177 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1178 wpa_s->conf->ap_scan == 2 &&
1179 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1180 /* Use ap_scan==1 style network selection to find the network
1181 */
1182 wpa_s->scan_req = 2;
1183 wpa_s->reassociate = 1;
1184 wpa_supplicant_req_scan(wpa_s, 0, 0);
1185 return;
1186 #endif /* CONFIG_WPS */
1187 } else {
1188 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1189 wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1190 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1191 }
1192 wpa_supplicant_cancel_sched_scan(wpa_s);
1193 wpa_supplicant_cancel_scan(wpa_s);
1195 /* Starting new association, so clear the possibly used WPA IE from the
1196 * previous association. */
1197 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1199 #ifdef IEEE8021X_EAPOL
1200 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1201 if (ssid->leap) {
1202 if (ssid->non_leap == 0)
1203 algs = WPA_AUTH_ALG_LEAP;
1204 else
1205 algs |= WPA_AUTH_ALG_LEAP;
1206 }
1207 }
1208 #endif /* IEEE8021X_EAPOL */
1209 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1210 if (ssid->auth_alg) {
1211 algs = ssid->auth_alg;
1212 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1213 "0x%x", algs);
1214 }
1216 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1217 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1218 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
1219 int try_opportunistic;
1220 try_opportunistic = ssid->proactive_key_caching &&
1221 (ssid->proto & WPA_PROTO_RSN);
1222 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1223 wpa_s->current_ssid,
1224 try_opportunistic) == 0)
1225 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1226 wpa_ie_len = sizeof(wpa_ie);
1227 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1228 wpa_ie, &wpa_ie_len)) {
1229 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1230 "key management and encryption suites");
1231 return;
1232 }
1233 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
1234 wpa_ie_len = sizeof(wpa_ie);
1235 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1236 wpa_ie, &wpa_ie_len)) {
1237 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1238 "key management and encryption suites (no "
1239 "scan results)");
1240 return;
1241 }
1242 #ifdef CONFIG_WPS
1243 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1244 struct wpabuf *wps_ie;
1245 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1246 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1247 wpa_ie_len = wpabuf_len(wps_ie);
1248 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1249 } else
1250 wpa_ie_len = 0;
1251 wpabuf_free(wps_ie);
1252 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1253 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1254 params.wps = WPS_MODE_PRIVACY;
1255 else
1256 params.wps = WPS_MODE_OPEN;
1257 wpa_s->wpa_proto = 0;
1258 #endif /* CONFIG_WPS */
1259 } else {
1260 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1261 wpa_ie_len = 0;
1262 wpa_s->wpa_proto = 0;
1263 }
1265 #ifdef CONFIG_P2P
1266 if (wpa_s->global->p2p) {
1267 u8 *pos;
1268 size_t len;
1269 int res;
1270 int p2p_group;
1271 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1272 pos = wpa_ie + wpa_ie_len;
1273 len = sizeof(wpa_ie) - wpa_ie_len;
1274 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1275 if (res >= 0)
1276 wpa_ie_len += res;
1277 }
1279 wpa_s->cross_connect_disallowed = 0;
1280 if (bss) {
1281 struct wpabuf *p2p;
1282 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1283 if (p2p) {
1284 wpa_s->cross_connect_disallowed =
1285 p2p_get_cross_connect_disallowed(p2p);
1286 wpabuf_free(p2p);
1287 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1288 "connection",
1289 wpa_s->cross_connect_disallowed ?
1290 "disallows" : "allows");
1291 }
1292 }
1293 #endif /* CONFIG_P2P */
1295 #ifdef CONFIG_INTERWORKING
1296 if (wpa_s->conf->interworking) {
1297 u8 *pos = wpa_ie;
1298 if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN)
1299 pos += 2 + pos[1];
1300 os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie));
1301 wpa_ie_len += 6;
1302 *pos++ = WLAN_EID_EXT_CAPAB;
1303 *pos++ = 4;
1304 *pos++ = 0x00;
1305 *pos++ = 0x00;
1306 *pos++ = 0x00;
1307 *pos++ = 0x80; /* Bit 31 - Interworking */
1308 }
1309 #endif /* CONFIG_INTERWORKING */
1311 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1312 use_crypt = 1;
1313 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1314 cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1315 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1316 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1317 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1318 use_crypt = 0;
1319 if (wpa_set_wep_keys(wpa_s, ssid)) {
1320 use_crypt = 1;
1321 wep_keys_set = 1;
1322 }
1323 }
1324 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1325 use_crypt = 0;
1327 #ifdef IEEE8021X_EAPOL
1328 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1329 if ((ssid->eapol_flags &
1330 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1331 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1332 !wep_keys_set) {
1333 use_crypt = 0;
1334 } else {
1335 /* Assume that dynamic WEP-104 keys will be used and
1336 * set cipher suites in order for drivers to expect
1337 * encryption. */
1338 cipher_pairwise = cipher_group = CIPHER_WEP104;
1339 }
1340 }
1341 #endif /* IEEE8021X_EAPOL */
1343 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1344 /* Set the key before (and later after) association */
1345 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1346 }
1348 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1349 if (bss) {
1350 params.ssid = bss->ssid;
1351 params.ssid_len = bss->ssid_len;
1352 if (!wpas_driver_bss_selection(wpa_s)) {
1353 params.bssid = bss->bssid;
1354 params.freq = bss->freq;
1355 }
1356 } else {
1357 params.ssid = ssid->ssid;
1358 params.ssid_len = ssid->ssid_len;
1359 }
1361 if (ssid->mode == WPAS_MODE_IBSS && ssid->bssid_set &&
1362 wpa_s->conf->ap_scan == 2) {
1363 params.bssid = ssid->bssid;
1364 params.fixed_bssid = 1;
1365 }
1367 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1368 params.freq == 0)
1369 params.freq = ssid->frequency; /* Initial channel for IBSS */
1370 params.wpa_ie = wpa_ie;
1371 params.wpa_ie_len = wpa_ie_len;
1372 params.pairwise_suite = cipher_pairwise;
1373 params.group_suite = cipher_group;
1374 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1375 params.wpa_proto = wpa_s->wpa_proto;
1376 params.auth_alg = algs;
1377 params.mode = ssid->mode;
1378 for (i = 0; i < NUM_WEP_KEYS; i++) {
1379 if (ssid->wep_key_len[i])
1380 params.wep_key[i] = ssid->wep_key[i];
1381 params.wep_key_len[i] = ssid->wep_key_len[i];
1382 }
1383 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1385 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1386 (params.key_mgmt_suite == KEY_MGMT_PSK ||
1387 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1388 params.passphrase = ssid->passphrase;
1389 if (ssid->psk_set)
1390 params.psk = ssid->psk;
1391 }
1393 params.drop_unencrypted = use_crypt;
1395 #ifdef CONFIG_IEEE80211W
1396 params.mgmt_frame_protection = ssid->ieee80211w;
1397 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1398 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1399 struct wpa_ie_data ie;
1400 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1401 ie.capabilities &
1402 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1403 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1404 "MFP: require MFP");
1405 params.mgmt_frame_protection =
1406 MGMT_FRAME_PROTECTION_REQUIRED;
1407 }
1408 }
1409 #endif /* CONFIG_IEEE80211W */
1411 params.p2p = ssid->p2p_group;
1413 if (wpa_s->parent->set_sta_uapsd)
1414 params.uapsd = wpa_s->parent->sta_uapsd;
1415 else
1416 params.uapsd = -1;
1418 #ifdef CONFIG_HT_OVERRIDES
1419 os_memset(&htcaps, 0, sizeof(htcaps));
1420 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
1421 params.htcaps = (u8 *) &htcaps;
1422 params.htcaps_mask = (u8 *) &htcaps_mask;
1423 wpa_supplicant_apply_ht_overrides(wpa_s, ssid, ¶ms);
1424 #endif /* CONFIG_HT_OVERRIDES */
1426 ret = wpa_drv_associate(wpa_s, ¶ms);
1427 if (ret < 0) {
1428 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1429 "failed");
1430 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1431 /*
1432 * The driver is known to mean what is saying, so we
1433 * can stop right here; the association will not
1434 * succeed.
1435 */
1436 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1437 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1438 return;
1439 }
1440 /* try to continue anyway; new association will be tried again
1441 * after timeout */
1442 assoc_failed = 1;
1443 }
1445 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1446 /* Set the key after the association just in case association
1447 * cleared the previously configured key. */
1448 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1449 /* No need to timeout authentication since there is no key
1450 * management. */
1451 wpa_supplicant_cancel_auth_timeout(wpa_s);
1452 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1453 #ifdef CONFIG_IBSS_RSN
1454 } else if (ssid->mode == WPAS_MODE_IBSS &&
1455 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1456 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1457 /*
1458 * RSN IBSS authentication is per-STA and we can disable the
1459 * per-BSSID authentication.
1460 */
1461 wpa_supplicant_cancel_auth_timeout(wpa_s);
1462 #endif /* CONFIG_IBSS_RSN */
1463 } else {
1464 /* Timeout for IEEE 802.11 authentication and association */
1465 int timeout = 60;
1467 if (assoc_failed) {
1468 /* give IBSS a bit more time */
1469 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1470 } else if (wpa_s->conf->ap_scan == 1) {
1471 /* give IBSS a bit more time */
1472 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1473 }
1474 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1475 }
1477 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1478 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1479 /* Set static WEP keys again */
1480 wpa_set_wep_keys(wpa_s, ssid);
1481 }
1483 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1484 /*
1485 * Do not allow EAP session resumption between different
1486 * network configurations.
1487 */
1488 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1489 }
1490 old_ssid = wpa_s->current_ssid;
1491 wpa_s->current_ssid = ssid;
1492 wpa_s->current_bss = bss;
1493 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1494 wpa_supplicant_initiate_eapol(wpa_s);
1495 if (old_ssid != wpa_s->current_ssid)
1496 wpas_notify_network_changed(wpa_s);
1497 }
1500 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1501 const u8 *addr)
1502 {
1503 struct wpa_ssid *old_ssid;
1505 wpa_clear_keys(wpa_s, addr);
1506 wpa_supplicant_mark_disassoc(wpa_s);
1507 old_ssid = wpa_s->current_ssid;
1508 wpa_s->current_ssid = NULL;
1509 wpa_s->current_bss = NULL;
1510 wpa_sm_set_config(wpa_s->wpa, NULL);
1511 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1512 if (old_ssid != wpa_s->current_ssid)
1513 wpas_notify_network_changed(wpa_s);
1514 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1515 }
1518 /**
1519 * wpa_supplicant_disassociate - Disassociate the current connection
1520 * @wpa_s: Pointer to wpa_supplicant data
1521 * @reason_code: IEEE 802.11 reason code for the disassociate frame
1522 *
1523 * This function is used to request %wpa_supplicant to disassociate with the
1524 * current AP.
1525 */
1526 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1527 int reason_code)
1528 {
1529 u8 *addr = NULL;
1531 if (!is_zero_ether_addr(wpa_s->bssid)) {
1532 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1533 addr = wpa_s->bssid;
1534 }
1536 wpa_supplicant_clear_connection(wpa_s, addr);
1537 }
1540 /**
1541 * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1542 * @wpa_s: Pointer to wpa_supplicant data
1543 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1544 *
1545 * This function is used to request %wpa_supplicant to deauthenticate from the
1546 * current AP.
1547 */
1548 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1549 int reason_code)
1550 {
1551 u8 *addr = NULL;
1553 if (!is_zero_ether_addr(wpa_s->bssid)) {
1554 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, reason_code);
1555 addr = wpa_s->bssid;
1556 }
1558 wpa_supplicant_clear_connection(wpa_s, addr);
1559 }
1562 /**
1563 * wpa_supplicant_enable_network - Mark a configured network as enabled
1564 * @wpa_s: wpa_supplicant structure for a network interface
1565 * @ssid: wpa_ssid structure for a configured network or %NULL
1566 *
1567 * Enables the specified network or all networks if no network specified.
1568 */
1569 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1570 struct wpa_ssid *ssid)
1571 {
1572 struct wpa_ssid *other_ssid;
1573 int was_disabled;
1575 if (ssid == NULL) {
1576 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1577 other_ssid = other_ssid->next) {
1578 if (other_ssid->disabled == 2)
1579 continue; /* do not change persistent P2P group
1580 * data */
1581 if (other_ssid == wpa_s->current_ssid &&
1582 other_ssid->disabled)
1583 wpa_s->reassociate = 1;
1585 was_disabled = other_ssid->disabled;
1587 other_ssid->disabled = 0;
1589 if (was_disabled != other_ssid->disabled)
1590 wpas_notify_network_enabled_changed(
1591 wpa_s, other_ssid);
1592 }
1593 if (wpa_s->reassociate)
1594 wpa_supplicant_req_scan(wpa_s, 0, 0);
1595 } else if (ssid->disabled && ssid->disabled != 2) {
1596 if (wpa_s->current_ssid == NULL) {
1597 /*
1598 * Try to reassociate since there is no current
1599 * configuration and a new network was made available.
1600 */
1601 wpa_s->reassociate = 1;
1602 wpa_supplicant_req_scan(wpa_s, 0, 0);
1603 }
1605 was_disabled = ssid->disabled;
1607 ssid->disabled = 0;
1609 if (was_disabled != ssid->disabled)
1610 wpas_notify_network_enabled_changed(wpa_s, ssid);
1611 }
1612 }
1615 /**
1616 * wpa_supplicant_disable_network - Mark a configured network as disabled
1617 * @wpa_s: wpa_supplicant structure for a network interface
1618 * @ssid: wpa_ssid structure for a configured network or %NULL
1619 *
1620 * Disables the specified network or all networks if no network specified.
1621 */
1622 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1623 struct wpa_ssid *ssid)
1624 {
1625 struct wpa_ssid *other_ssid;
1626 int was_disabled;
1628 if (ssid == NULL) {
1629 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1630 other_ssid = other_ssid->next) {
1631 was_disabled = other_ssid->disabled;
1632 if (was_disabled == 2)
1633 continue; /* do not change persistent P2P group
1634 * data */
1636 other_ssid->disabled = 1;
1638 if (was_disabled != other_ssid->disabled)
1639 wpas_notify_network_enabled_changed(
1640 wpa_s, other_ssid);
1641 }
1642 if (wpa_s->current_ssid)
1643 wpa_supplicant_disassociate(
1644 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1645 } else if (ssid->disabled != 2) {
1646 if (ssid == wpa_s->current_ssid)
1647 wpa_supplicant_disassociate(
1648 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1650 was_disabled = ssid->disabled;
1652 ssid->disabled = 1;
1654 if (was_disabled != ssid->disabled)
1655 wpas_notify_network_enabled_changed(wpa_s, ssid);
1656 }
1657 }
1660 /**
1661 * wpa_supplicant_select_network - Attempt association with a network
1662 * @wpa_s: wpa_supplicant structure for a network interface
1663 * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1664 */
1665 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1666 struct wpa_ssid *ssid)
1667 {
1669 struct wpa_ssid *other_ssid;
1670 int disconnected = 0;
1672 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid) {
1673 wpa_supplicant_disassociate(
1674 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1675 disconnected = 1;
1676 }
1678 /*
1679 * Mark all other networks disabled or mark all networks enabled if no
1680 * network specified.
1681 */
1682 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1683 other_ssid = other_ssid->next) {
1684 int was_disabled = other_ssid->disabled;
1685 if (was_disabled == 2)
1686 continue; /* do not change persistent P2P group data */
1688 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1690 if (was_disabled != other_ssid->disabled)
1691 wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1692 }
1694 if (ssid && ssid == wpa_s->current_ssid && wpa_s->current_ssid) {
1695 /* We are already associated with the selected network */
1696 wpa_printf(MSG_DEBUG, "Already associated with the "
1697 "selected network - do nothing");
1698 return;
1699 }
1701 if (ssid)
1702 wpa_s->current_ssid = ssid;
1703 wpa_s->connect_without_scan = NULL;
1704 wpa_s->disconnected = 0;
1705 wpa_s->reassociate = 1;
1706 wpa_supplicant_req_scan(wpa_s, 0, disconnected ? 100000 : 0);
1708 if (ssid)
1709 wpas_notify_network_selected(wpa_s, ssid);
1710 }
1713 /**
1714 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1715 * @wpa_s: wpa_supplicant structure for a network interface
1716 * @ap_scan: AP scan mode
1717 * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1718 *
1719 */
1720 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1721 {
1723 int old_ap_scan;
1725 if (ap_scan < 0 || ap_scan > 2)
1726 return -1;
1728 #ifdef ANDROID
1729 if (ap_scan == 2 && ap_scan != wpa_s->conf->ap_scan &&
1730 wpa_s->wpa_state >= WPA_ASSOCIATING &&
1731 wpa_s->wpa_state < WPA_COMPLETED) {
1732 wpa_printf(MSG_ERROR, "ap_scan = %d (%d) rejected while "
1733 "associating", wpa_s->conf->ap_scan, ap_scan);
1734 return 0;
1735 }
1736 #endif /* ANDROID */
1738 old_ap_scan = wpa_s->conf->ap_scan;
1739 wpa_s->conf->ap_scan = ap_scan;
1741 if (old_ap_scan != wpa_s->conf->ap_scan)
1742 wpas_notify_ap_scan_changed(wpa_s);
1744 return 0;
1745 }
1748 /**
1749 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age
1750 * @wpa_s: wpa_supplicant structure for a network interface
1751 * @expire_age: Expiration age in seconds
1752 * Returns: 0 if succeed or -1 if expire_age has an invalid value
1753 *
1754 */
1755 int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
1756 unsigned int bss_expire_age)
1757 {
1758 if (bss_expire_age < 10) {
1759 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u",
1760 bss_expire_age);
1761 return -1;
1762 }
1763 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec",
1764 bss_expire_age);
1765 wpa_s->conf->bss_expiration_age = bss_expire_age;
1767 return 0;
1768 }
1771 /**
1772 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count
1773 * @wpa_s: wpa_supplicant structure for a network interface
1774 * @expire_count: number of scans after which an unseen BSS is reclaimed
1775 * Returns: 0 if succeed or -1 if expire_count has an invalid value
1776 *
1777 */
1778 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
1779 unsigned int bss_expire_count)
1780 {
1781 if (bss_expire_count < 1) {
1782 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u",
1783 bss_expire_count);
1784 return -1;
1785 }
1786 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u",
1787 bss_expire_count);
1788 wpa_s->conf->bss_expiration_scan_count = bss_expire_count;
1790 return 0;
1791 }
1794 /**
1795 * wpa_supplicant_set_debug_params - Set global debug params
1796 * @global: wpa_global structure
1797 * @debug_level: debug level
1798 * @debug_timestamp: determines if show timestamp in debug data
1799 * @debug_show_keys: determines if show keys in debug data
1800 * Returns: 0 if succeed or -1 if debug_level has wrong value
1801 */
1802 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1803 int debug_timestamp, int debug_show_keys)
1804 {
1806 int old_level, old_timestamp, old_show_keys;
1808 /* check for allowed debuglevels */
1809 if (debug_level != MSG_EXCESSIVE &&
1810 debug_level != MSG_MSGDUMP &&
1811 debug_level != MSG_DEBUG &&
1812 debug_level != MSG_INFO &&
1813 debug_level != MSG_WARNING &&
1814 debug_level != MSG_ERROR)
1815 return -1;
1817 old_level = wpa_debug_level;
1818 old_timestamp = wpa_debug_timestamp;
1819 old_show_keys = wpa_debug_show_keys;
1821 wpa_debug_level = debug_level;
1822 wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1823 wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1825 if (wpa_debug_level != old_level)
1826 wpas_notify_debug_level_changed(global);
1827 if (wpa_debug_timestamp != old_timestamp)
1828 wpas_notify_debug_timestamp_changed(global);
1829 if (wpa_debug_show_keys != old_show_keys)
1830 wpas_notify_debug_show_keys_changed(global);
1832 return 0;
1833 }
1836 /**
1837 * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1838 * @wpa_s: Pointer to wpa_supplicant data
1839 * Returns: A pointer to the current network structure or %NULL on failure
1840 */
1841 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1842 {
1843 struct wpa_ssid *entry;
1844 u8 ssid[MAX_SSID_LEN];
1845 int res;
1846 size_t ssid_len;
1847 u8 bssid[ETH_ALEN];
1848 int wired;
1850 res = wpa_drv_get_ssid(wpa_s, ssid);
1851 if (res < 0) {
1852 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1853 "driver");
1854 return NULL;
1855 }
1856 ssid_len = res;
1858 if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1859 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1860 "driver");
1861 return NULL;
1862 }
1864 wired = wpa_s->conf->ap_scan == 0 &&
1865 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1867 entry = wpa_s->conf->ssid;
1868 while (entry) {
1869 if (!entry->disabled &&
1870 ((ssid_len == entry->ssid_len &&
1871 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1872 (!entry->bssid_set ||
1873 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1874 return entry;
1875 #ifdef CONFIG_WPS
1876 if (!entry->disabled &&
1877 (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1878 (entry->ssid == NULL || entry->ssid_len == 0) &&
1879 (!entry->bssid_set ||
1880 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1881 return entry;
1882 #endif /* CONFIG_WPS */
1884 if (!entry->disabled && entry->bssid_set &&
1885 entry->ssid_len == 0 &&
1886 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)
1887 return entry;
1889 entry = entry->next;
1890 }
1892 return NULL;
1893 }
1896 static int select_driver(struct wpa_supplicant *wpa_s, int i)
1897 {
1898 struct wpa_global *global = wpa_s->global;
1900 if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) {
1901 global->drv_priv[i] = wpa_drivers[i]->global_init();
1902 if (global->drv_priv[i] == NULL) {
1903 wpa_printf(MSG_ERROR, "Failed to initialize driver "
1904 "'%s'", wpa_drivers[i]->name);
1905 return -1;
1906 }
1907 }
1909 wpa_s->driver = wpa_drivers[i];
1910 wpa_s->global_drv_priv = global->drv_priv[i];
1912 return 0;
1913 }
1916 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1917 const char *name)
1918 {
1919 int i;
1920 size_t len;
1921 const char *pos, *driver = name;
1923 if (wpa_s == NULL)
1924 return -1;
1926 if (wpa_drivers[0] == NULL) {
1927 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1928 "wpa_supplicant");
1929 return -1;
1930 }
1932 if (name == NULL) {
1933 /* default to first driver in the list */
1934 return select_driver(wpa_s, 0);
1935 }
1937 do {
1938 pos = os_strchr(driver, ',');
1939 if (pos)
1940 len = pos - driver;
1941 else
1942 len = os_strlen(driver);
1944 for (i = 0; wpa_drivers[i]; i++) {
1945 if (os_strlen(wpa_drivers[i]->name) == len &&
1946 os_strncmp(driver, wpa_drivers[i]->name, len) ==
1947 0) {
1948 /* First driver that succeeds wins */
1949 if (select_driver(wpa_s, i) == 0)
1950 return 0;
1951 }
1952 }
1954 driver = pos + 1;
1955 } while (pos);
1957 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1958 return -1;
1959 }
1962 /**
1963 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1964 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1965 * with struct wpa_driver_ops::init()
1966 * @src_addr: Source address of the EAPOL frame
1967 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1968 * @len: Length of the EAPOL data
1969 *
1970 * This function is called for each received EAPOL frame. Most driver
1971 * interfaces rely on more generic OS mechanism for receiving frames through
1972 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1973 * take care of received EAPOL frames and deliver them to the core supplicant
1974 * code by calling this function.
1975 */
1976 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1977 const u8 *buf, size_t len)
1978 {
1979 struct wpa_supplicant *wpa_s = ctx;
1981 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1982 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1984 if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1985 /*
1986 * There is possible race condition between receiving the
1987 * association event and the EAPOL frame since they are coming
1988 * through different paths from the driver. In order to avoid
1989 * issues in trying to process the EAPOL frame before receiving
1990 * association information, lets queue it for processing until
1991 * the association event is received.
1992 */
1993 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
1994 "of received EAPOL frame");
1995 wpabuf_free(wpa_s->pending_eapol_rx);
1996 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1997 if (wpa_s->pending_eapol_rx) {
1998 os_get_time(&wpa_s->pending_eapol_rx_time);
1999 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
2000 ETH_ALEN);
2001 }
2002 return;
2003 }
2005 #ifdef CONFIG_AP
2006 if (wpa_s->ap_iface) {
2007 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
2008 return;
2009 }
2010 #endif /* CONFIG_AP */
2012 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
2013 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
2014 "no key management is configured");
2015 return;
2016 }
2018 if (wpa_s->eapol_received == 0 &&
2019 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
2020 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
2021 wpa_s->wpa_state != WPA_COMPLETED) &&
2022 (wpa_s->current_ssid == NULL ||
2023 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
2024 /* Timeout for completing IEEE 802.1X and WPA authentication */
2025 wpa_supplicant_req_auth_timeout(
2026 wpa_s,
2027 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
2028 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
2029 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
2030 70 : 10, 0);
2031 }
2032 wpa_s->eapol_received++;
2034 if (wpa_s->countermeasures) {
2035 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
2036 "EAPOL packet");
2037 return;
2038 }
2040 #ifdef CONFIG_IBSS_RSN
2041 if (wpa_s->current_ssid &&
2042 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
2043 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
2044 return;
2045 }
2046 #endif /* CONFIG_IBSS_RSN */
2048 /* Source address of the incoming EAPOL frame could be compared to the
2049 * current BSSID. However, it is possible that a centralized
2050 * Authenticator could be using another MAC address than the BSSID of
2051 * an AP, so just allow any address to be used for now. The replies are
2052 * still sent to the current BSSID (if available), though. */
2054 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
2055 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
2056 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
2057 return;
2058 wpa_drv_poll(wpa_s);
2059 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
2060 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
2061 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
2062 /*
2063 * Set portValid = TRUE here since we are going to skip 4-way
2064 * handshake processing which would normally set portValid. We
2065 * need this to allow the EAPOL state machines to be completed
2066 * without going through EAPOL-Key handshake.
2067 */
2068 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
2069 }
2070 }
2073 int wpa_supplicant_update_mac_addr(struct wpa_supplicant *wpa_s)
2074 {
2075 if (wpa_s->driver->send_eapol) {
2076 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2077 if (addr)
2078 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2079 } else if (!(wpa_s->drv_flags &
2080 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
2081 l2_packet_deinit(wpa_s->l2);
2082 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
2083 wpa_drv_get_mac_addr(wpa_s),
2084 ETH_P_EAPOL,
2085 wpa_supplicant_rx_eapol, wpa_s, 0);
2086 if (wpa_s->l2 == NULL)
2087 return -1;
2088 } else {
2089 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2090 if (addr)
2091 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2092 }
2094 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
2095 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
2096 return -1;
2097 }
2099 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
2100 MAC2STR(wpa_s->own_addr));
2101 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2103 return 0;
2104 }
2107 /**
2108 * wpa_supplicant_driver_init - Initialize driver interface parameters
2109 * @wpa_s: Pointer to wpa_supplicant data
2110 * Returns: 0 on success, -1 on failure
2111 *
2112 * This function is called to initialize driver interface parameters.
2113 * wpa_drv_init() must have been called before this function to initialize the
2114 * driver interface.
2115 */
2116 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
2117 {
2118 static int interface_count = 0;
2120 if (wpa_supplicant_update_mac_addr(wpa_s) < 0)
2121 return -1;
2123 if (wpa_s->bridge_ifname[0]) {
2124 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
2125 "interface '%s'", wpa_s->bridge_ifname);
2126 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
2127 wpa_s->own_addr,
2128 ETH_P_EAPOL,
2129 wpa_supplicant_rx_eapol, wpa_s,
2130 0);
2131 if (wpa_s->l2_br == NULL) {
2132 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
2133 "connection for the bridge interface '%s'",
2134 wpa_s->bridge_ifname);
2135 return -1;
2136 }
2137 }
2139 wpa_clear_keys(wpa_s, NULL);
2141 /* Make sure that TKIP countermeasures are not left enabled (could
2142 * happen if wpa_supplicant is killed during countermeasures. */
2143 wpa_drv_set_countermeasures(wpa_s, 0);
2145 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
2146 wpa_drv_flush_pmkid(wpa_s);
2148 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
2149 wpa_s->prev_scan_wildcard = 0;
2151 if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
2152 if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count,
2153 100000))
2154 wpa_supplicant_req_scan(wpa_s, interface_count,
2155 100000);
2156 interface_count++;
2157 } else
2158 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
2160 return 0;
2161 }
2164 static int wpa_supplicant_daemon(const char *pid_file)
2165 {
2166 wpa_printf(MSG_DEBUG, "Daemonize..");
2167 return os_daemonize(pid_file);
2168 }
2171 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2172 {
2173 struct wpa_supplicant *wpa_s;
2175 wpa_s = os_zalloc(sizeof(*wpa_s));
2176 if (wpa_s == NULL)
2177 return NULL;
2178 wpa_s->scan_req = 1;
2179 wpa_s->scan_interval = 5;
2180 wpa_s->new_connection = 1;
2181 wpa_s->parent = wpa_s;
2182 wpa_s->sched_scanning = 0;
2184 return wpa_s;
2185 }
2188 #ifdef CONFIG_HT_OVERRIDES
2190 static int wpa_set_htcap_mcs(struct wpa_supplicant *wpa_s,
2191 struct ieee80211_ht_capabilities *htcaps,
2192 struct ieee80211_ht_capabilities *htcaps_mask,
2193 const char *ht_mcs)
2194 {
2195 /* parse ht_mcs into hex array */
2196 int i;
2197 const char *tmp = ht_mcs;
2198 char *end = NULL;
2200 /* If ht_mcs is null, do not set anything */
2201 if (!ht_mcs)
2202 return 0;
2204 /* This is what we are setting in the kernel */
2205 os_memset(&htcaps->supported_mcs_set, 0, IEEE80211_HT_MCS_MASK_LEN);
2207 wpa_msg(wpa_s, MSG_DEBUG, "set_htcap, ht_mcs -:%s:-", ht_mcs);
2209 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
2210 errno = 0;
2211 long v = strtol(tmp, &end, 16);
2212 if (errno == 0) {
2213 wpa_msg(wpa_s, MSG_DEBUG,
2214 "htcap value[%i]: %ld end: %p tmp: %p",
2215 i, v, end, tmp);
2216 if (end == tmp)
2217 break;
2219 htcaps->supported_mcs_set[i] = v;
2220 tmp = end;
2221 } else {
2222 wpa_msg(wpa_s, MSG_ERROR,
2223 "Failed to parse ht-mcs: %s, error: %s\n",
2224 ht_mcs, strerror(errno));
2225 return -1;
2226 }
2227 }
2229 /*
2230 * If we were able to parse any values, then set mask for the MCS set.
2231 */
2232 if (i) {
2233 os_memset(&htcaps_mask->supported_mcs_set, 0xff,
2234 IEEE80211_HT_MCS_MASK_LEN - 1);
2235 /* skip the 3 reserved bits */
2236 htcaps_mask->supported_mcs_set[IEEE80211_HT_MCS_MASK_LEN - 1] =
2237 0x1f;
2238 }
2240 return 0;
2241 }
2244 static int wpa_disable_max_amsdu(struct wpa_supplicant *wpa_s,
2245 struct ieee80211_ht_capabilities *htcaps,
2246 struct ieee80211_ht_capabilities *htcaps_mask,
2247 int disabled)
2248 {
2249 u16 msk;
2251 wpa_msg(wpa_s, MSG_DEBUG, "set_disable_max_amsdu: %d", disabled);
2253 if (disabled == -1)
2254 return 0;
2256 msk = host_to_le16(HT_CAP_INFO_MAX_AMSDU_SIZE);
2257 htcaps_mask->ht_capabilities_info |= msk;
2258 if (disabled)
2259 htcaps->ht_capabilities_info &= msk;
2260 else
2261 htcaps->ht_capabilities_info |= msk;
2263 return 0;
2264 }
2267 static int wpa_set_ampdu_factor(struct wpa_supplicant *wpa_s,
2268 struct ieee80211_ht_capabilities *htcaps,
2269 struct ieee80211_ht_capabilities *htcaps_mask,
2270 int factor)
2271 {
2272 wpa_msg(wpa_s, MSG_DEBUG, "set_ampdu_factor: %d", factor);
2274 if (factor == -1)
2275 return 0;
2277 if (factor < 0 || factor > 3) {
2278 wpa_msg(wpa_s, MSG_ERROR, "ampdu_factor: %d out of range. "
2279 "Must be 0-3 or -1", factor);
2280 return -EINVAL;
2281 }
2283 htcaps_mask->a_mpdu_params |= 0x3; /* 2 bits for factor */
2284 htcaps->a_mpdu_params &= ~0x3;
2285 htcaps->a_mpdu_params |= factor & 0x3;
2287 return 0;
2288 }
2291 static int wpa_set_ampdu_density(struct wpa_supplicant *wpa_s,
2292 struct ieee80211_ht_capabilities *htcaps,
2293 struct ieee80211_ht_capabilities *htcaps_mask,
2294 int density)
2295 {
2296 wpa_msg(wpa_s, MSG_DEBUG, "set_ampdu_density: %d", density);
2298 if (density == -1)
2299 return 0;
2301 if (density < 0 || density > 7) {
2302 wpa_msg(wpa_s, MSG_ERROR,
2303 "ampdu_density: %d out of range. Must be 0-7 or -1.",
2304 density);
2305 return -EINVAL;
2306 }
2308 htcaps_mask->a_mpdu_params |= 0x1C;
2309 htcaps->a_mpdu_params &= ~(0x1C);
2310 htcaps->a_mpdu_params |= (density << 2) & 0x1C;
2312 return 0;
2313 }
2316 static int wpa_set_disable_ht40(struct wpa_supplicant *wpa_s,
2317 struct ieee80211_ht_capabilities *htcaps,
2318 struct ieee80211_ht_capabilities *htcaps_mask,
2319 int disabled)
2320 {
2321 /* Masking these out disables HT40 */
2322 u16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET |
2323 HT_CAP_INFO_SHORT_GI40MHZ);
2325 wpa_msg(wpa_s, MSG_DEBUG, "set_disable_ht40: %d", disabled);
2327 if (disabled)
2328 htcaps->ht_capabilities_info &= ~msk;
2329 else
2330 htcaps->ht_capabilities_info |= msk;
2332 htcaps_mask->ht_capabilities_info |= msk;
2334 return 0;
2335 }
2338 void wpa_supplicant_apply_ht_overrides(
2339 struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
2340 struct wpa_driver_associate_params *params)
2341 {
2342 struct ieee80211_ht_capabilities *htcaps;
2343 struct ieee80211_ht_capabilities *htcaps_mask;
2345 if (!ssid)
2346 return;
2348 params->disable_ht = ssid->disable_ht;
2349 if (!params->htcaps || !params->htcaps_mask)
2350 return;
2352 htcaps = (struct ieee80211_ht_capabilities *) params->htcaps;
2353 htcaps_mask = (struct ieee80211_ht_capabilities *) params->htcaps_mask;
2354 wpa_set_htcap_mcs(wpa_s, htcaps, htcaps_mask, ssid->ht_mcs);
2355 wpa_disable_max_amsdu(wpa_s, htcaps, htcaps_mask,
2356 ssid->disable_max_amsdu);
2357 wpa_set_ampdu_factor(wpa_s, htcaps, htcaps_mask, ssid->ampdu_factor);
2358 wpa_set_ampdu_density(wpa_s, htcaps, htcaps_mask, ssid->ampdu_density);
2359 wpa_set_disable_ht40(wpa_s, htcaps, htcaps_mask, ssid->disable_ht40);
2360 }
2362 #endif /* CONFIG_HT_OVERRIDES */
2365 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2366 struct wpa_interface *iface)
2367 {
2368 const char *ifname, *driver;
2369 struct wpa_driver_capa capa;
2371 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2372 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2373 iface->confname ? iface->confname : "N/A",
2374 iface->driver ? iface->driver : "default",
2375 iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2376 iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2378 if (iface->confname) {
2379 #ifdef CONFIG_BACKEND_FILE
2380 wpa_s->confname = os_rel2abs_path(iface->confname);
2381 if (wpa_s->confname == NULL) {
2382 wpa_printf(MSG_ERROR, "Failed to get absolute path "
2383 "for configuration file '%s'.",
2384 iface->confname);
2385 return -1;
2386 }
2387 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2388 iface->confname, wpa_s->confname);
2389 #else /* CONFIG_BACKEND_FILE */
2390 wpa_s->confname = os_strdup(iface->confname);
2391 #endif /* CONFIG_BACKEND_FILE */
2392 wpa_s->conf = wpa_config_read(wpa_s->confname);
2393 if (wpa_s->conf == NULL) {
2394 wpa_printf(MSG_ERROR, "Failed to read or parse "
2395 "configuration '%s'.", wpa_s->confname);
2396 return -1;
2397 }
2399 /*
2400 * Override ctrl_interface and driver_param if set on command
2401 * line.
2402 */
2403 if (iface->ctrl_interface) {
2404 os_free(wpa_s->conf->ctrl_interface);
2405 wpa_s->conf->ctrl_interface =
2406 os_strdup(iface->ctrl_interface);
2407 }
2409 if (iface->driver_param) {
2410 os_free(wpa_s->conf->driver_param);
2411 wpa_s->conf->driver_param =
2412 os_strdup(iface->driver_param);
2413 }
2414 } else
2415 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2416 iface->driver_param);
2418 if (wpa_s->conf == NULL) {
2419 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2420 return -1;
2421 }
2423 if (iface->ifname == NULL) {
2424 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2425 return -1;
2426 }
2427 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2428 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2429 iface->ifname);
2430 return -1;
2431 }
2432 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2434 if (iface->bridge_ifname) {
2435 if (os_strlen(iface->bridge_ifname) >=
2436 sizeof(wpa_s->bridge_ifname)) {
2437 wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2438 "name '%s'.", iface->bridge_ifname);
2439 return -1;
2440 }
2441 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2442 sizeof(wpa_s->bridge_ifname));
2443 }
2445 /* RSNA Supplicant Key Management - INITIALIZE */
2446 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2447 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2449 /* Initialize driver interface and register driver event handler before
2450 * L2 receive handler so that association events are processed before
2451 * EAPOL-Key packets if both become available for the same select()
2452 * call. */
2453 driver = iface->driver;
2454 next_driver:
2455 if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2456 return -1;
2458 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2459 if (wpa_s->drv_priv == NULL) {
2460 const char *pos;
2461 pos = driver ? os_strchr(driver, ',') : NULL;
2462 if (pos) {
2463 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2464 "driver interface - try next driver wrapper");
2465 driver = pos + 1;
2466 goto next_driver;
2467 }
2468 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2469 "interface");
2470 return -1;
2471 }
2472 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2473 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2474 "driver_param '%s'", wpa_s->conf->driver_param);
2475 return -1;
2476 }
2478 ifname = wpa_drv_get_ifname(wpa_s);
2479 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2480 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2481 "interface name with '%s'", ifname);
2482 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2483 }
2485 if (wpa_supplicant_init_wpa(wpa_s) < 0)
2486 return -1;
2488 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2489 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2490 NULL);
2491 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2493 if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2494 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2495 wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2496 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2497 "dot11RSNAConfigPMKLifetime");
2498 return -1;
2499 }
2501 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2502 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2503 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2504 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2505 "dot11RSNAConfigPMKReauthThreshold");
2506 return -1;
2507 }
2509 if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2510 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2511 wpa_s->conf->dot11RSNAConfigSATimeout)) {
2512 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2513 "dot11RSNAConfigSATimeout");
2514 return -1;
2515 }
2517 wpa_s->hw.modes = wpa_drv_get_hw_feature_data(wpa_s,
2518 &wpa_s->hw.num_modes,
2519 &wpa_s->hw.flags);
2521 if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2522 wpa_s->drv_capa_known = 1;
2523 wpa_s->drv_flags = capa.flags;
2524 wpa_s->probe_resp_offloads = capa.probe_resp_offloads;
2525 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2526 wpa_s->max_sched_scan_ssids = capa.max_sched_scan_ssids;
2527 wpa_s->sched_scan_supported = capa.sched_scan_supported;
2528 wpa_s->max_match_sets = capa.max_match_sets;
2529 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2530 wpa_s->max_stations = capa.max_stations;
2531 }
2532 if (wpa_s->max_remain_on_chan == 0)
2533 wpa_s->max_remain_on_chan = 1000;
2535 if (wpa_supplicant_driver_init(wpa_s) < 0)
2536 return -1;
2538 #ifdef CONFIG_TDLS
2539 if (wpa_tdls_init(wpa_s->wpa))
2540 return -1;
2541 #endif /* CONFIG_TDLS */
2543 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2544 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2545 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2546 return -1;
2547 }
2549 if (wpas_wps_init(wpa_s))
2550 return -1;
2552 if (wpa_supplicant_init_eapol(wpa_s) < 0)
2553 return -1;
2554 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2556 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2557 if (wpa_s->ctrl_iface == NULL) {
2558 wpa_printf(MSG_ERROR,
2559 "Failed to initialize control interface '%s'.\n"
2560 "You may have another wpa_supplicant process "
2561 "already running or the file was\n"
2562 "left by an unclean termination of wpa_supplicant "
2563 "in which case you will need\n"
2564 "to manually remove this file before starting "
2565 "wpa_supplicant again.\n",
2566 wpa_s->conf->ctrl_interface);
2567 return -1;
2568 }
2570 wpa_s->gas = gas_query_init(wpa_s);
2571 if (wpa_s->gas == NULL) {
2572 wpa_printf(MSG_ERROR, "Failed to initialize GAS query");
2573 return -1;
2574 }
2576 #ifdef CONFIG_P2P
2577 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2578 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2579 return -1;
2580 }
2581 #endif /* CONFIG_P2P */
2583 if (wpa_bss_init(wpa_s) < 0)
2584 return -1;
2586 return 0;
2587 }
2590 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2591 int notify, int terminate)
2592 {
2593 if (wpa_s->drv_priv) {
2594 wpa_supplicant_deauthenticate(wpa_s,
2595 WLAN_REASON_DEAUTH_LEAVING);
2597 wpa_drv_set_countermeasures(wpa_s, 0);
2598 wpa_clear_keys(wpa_s, NULL);
2599 }
2601 wpa_supplicant_cleanup(wpa_s);
2603 if (wpa_s->drv_priv)
2604 wpa_drv_deinit(wpa_s);
2606 if (notify)
2607 wpas_notify_iface_removed(wpa_s);
2609 if (terminate)
2610 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING);
2612 if (wpa_s->ctrl_iface) {
2613 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
2614 wpa_s->ctrl_iface = NULL;
2615 }
2617 if (wpa_s->conf != NULL) {
2618 wpa_config_free(wpa_s->conf);
2619 wpa_s->conf = NULL;
2620 }
2621 }
2624 /**
2625 * wpa_supplicant_add_iface - Add a new network interface
2626 * @global: Pointer to global data from wpa_supplicant_init()
2627 * @iface: Interface configuration options
2628 * Returns: Pointer to the created interface or %NULL on failure
2629 *
2630 * This function is used to add new network interfaces for %wpa_supplicant.
2631 * This can be called before wpa_supplicant_run() to add interfaces before the
2632 * main event loop has been started. In addition, new interfaces can be added
2633 * dynamically while %wpa_supplicant is already running. This could happen,
2634 * e.g., when a hotplug network adapter is inserted.
2635 */
2636 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2637 struct wpa_interface *iface)
2638 {
2639 struct wpa_supplicant *wpa_s;
2640 struct wpa_interface t_iface;
2641 struct wpa_ssid *ssid;
2643 if (global == NULL || iface == NULL)
2644 return NULL;
2646 wpa_s = wpa_supplicant_alloc();
2647 if (wpa_s == NULL)
2648 return NULL;
2650 wpa_s->global = global;
2652 t_iface = *iface;
2653 if (global->params.override_driver) {
2654 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2655 "('%s' -> '%s')",
2656 iface->driver, global->params.override_driver);
2657 t_iface.driver = global->params.override_driver;
2658 }
2659 if (global->params.override_ctrl_interface) {
2660 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2661 "ctrl_interface ('%s' -> '%s')",
2662 iface->ctrl_interface,
2663 global->params.override_ctrl_interface);
2664 t_iface.ctrl_interface =
2665 global->params.override_ctrl_interface;
2666 }
2667 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2668 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2669 iface->ifname);
2670 wpa_supplicant_deinit_iface(wpa_s, 0, 0);
2671 os_free(wpa_s);
2672 return NULL;
2673 }
2675 /* Notify the control interfaces about new iface */
2676 if (wpas_notify_iface_added(wpa_s)) {
2677 wpa_supplicant_deinit_iface(wpa_s, 1, 0);
2678 os_free(wpa_s);
2679 return NULL;
2680 }
2682 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2683 wpas_notify_network_added(wpa_s, ssid);
2685 wpa_s->next = global->ifaces;
2686 global->ifaces = wpa_s;
2688 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2690 return wpa_s;
2691 }
2694 /**
2695 * wpa_supplicant_remove_iface - Remove a network interface
2696 * @global: Pointer to global data from wpa_supplicant_init()
2697 * @wpa_s: Pointer to the network interface to be removed
2698 * Returns: 0 if interface was removed, -1 if interface was not found
2699 *
2700 * This function can be used to dynamically remove network interfaces from
2701 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2702 * addition, this function is used to remove all remaining interfaces when
2703 * %wpa_supplicant is terminated.
2704 */
2705 int wpa_supplicant_remove_iface(struct wpa_global *global,
2706 struct wpa_supplicant *wpa_s,
2707 int terminate)
2708 {
2709 struct wpa_supplicant *prev;
2711 /* Remove interface from the global list of interfaces */
2712 prev = global->ifaces;
2713 if (prev == wpa_s) {
2714 global->ifaces = wpa_s->next;
2715 } else {
2716 while (prev && prev->next != wpa_s)
2717 prev = prev->next;
2718 if (prev == NULL)
2719 return -1;
2720 prev->next = wpa_s->next;
2721 }
2723 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2725 if (global->p2p_group_formation == wpa_s)
2726 global->p2p_group_formation = NULL;
2727 wpa_supplicant_deinit_iface(wpa_s, 1, terminate);
2728 os_free(wpa_s);
2730 return 0;
2731 }
2734 /**
2735 * wpa_supplicant_get_eap_mode - Get the current EAP mode
2736 * @wpa_s: Pointer to the network interface
2737 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2738 */
2739 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2740 {
2741 const char *eapol_method;
2743 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2744 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2745 return "NO-EAP";
2746 }
2748 eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2749 if (eapol_method == NULL)
2750 return "UNKNOWN-EAP";
2752 return eapol_method;
2753 }
2756 /**
2757 * wpa_supplicant_get_iface - Get a new network interface
2758 * @global: Pointer to global data from wpa_supplicant_init()
2759 * @ifname: Interface name
2760 * Returns: Pointer to the interface or %NULL if not found
2761 */
2762 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2763 const char *ifname)
2764 {
2765 struct wpa_supplicant *wpa_s;
2767 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2768 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2769 return wpa_s;
2770 }
2771 return NULL;
2772 }
2775 #ifndef CONFIG_NO_WPA_MSG
2776 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2777 {
2778 struct wpa_supplicant *wpa_s = ctx;
2779 if (wpa_s == NULL)
2780 return NULL;
2781 return wpa_s->ifname;
2782 }
2783 #endif /* CONFIG_NO_WPA_MSG */
2786 /**
2787 * wpa_supplicant_init - Initialize %wpa_supplicant
2788 * @params: Parameters for %wpa_supplicant
2789 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2790 *
2791 * This function is used to initialize %wpa_supplicant. After successful
2792 * initialization, the returned data pointer can be used to add and remove
2793 * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2794 */
2795 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2796 {
2797 struct wpa_global *global;
2798 int ret, i;
2800 if (params == NULL)
2801 return NULL;
2803 #ifdef CONFIG_DRIVER_NDIS
2804 {
2805 void driver_ndis_init_ops(void);
2806 driver_ndis_init_ops();
2807 }
2808 #endif /* CONFIG_DRIVER_NDIS */
2810 #ifndef CONFIG_NO_WPA_MSG
2811 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2812 #endif /* CONFIG_NO_WPA_MSG */
2814 wpa_debug_open_file(params->wpa_debug_file_path);
2815 if (params->wpa_debug_syslog)
2816 wpa_debug_open_syslog();
2818 ret = eap_register_methods();
2819 if (ret) {
2820 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2821 if (ret == -2)
2822 wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2823 "the same EAP type.");
2824 return NULL;
2825 }
2827 global = os_zalloc(sizeof(*global));
2828 if (global == NULL)
2829 return NULL;
2830 dl_list_init(&global->p2p_srv_bonjour);
2831 dl_list_init(&global->p2p_srv_upnp);
2832 global->params.daemonize = params->daemonize;
2833 global->params.wait_for_monitor = params->wait_for_monitor;
2834 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2835 if (params->pid_file)
2836 global->params.pid_file = os_strdup(params->pid_file);
2837 if (params->ctrl_interface)
2838 global->params.ctrl_interface =
2839 os_strdup(params->ctrl_interface);
2840 if (params->override_driver)
2841 global->params.override_driver =
2842 os_strdup(params->override_driver);
2843 if (params->override_ctrl_interface)
2844 global->params.override_ctrl_interface =
2845 os_strdup(params->override_ctrl_interface);
2846 wpa_debug_level = global->params.wpa_debug_level =
2847 params->wpa_debug_level;
2848 wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2849 params->wpa_debug_show_keys;
2850 wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2851 params->wpa_debug_timestamp;
2853 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2855 if (eloop_init()) {
2856 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2857 wpa_supplicant_deinit(global);
2858 return NULL;
2859 }
2861 random_init(params->entropy_file);
2863 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2864 if (global->ctrl_iface == NULL) {
2865 wpa_supplicant_deinit(global);
2866 return NULL;
2867 }
2869 if (wpas_notify_supplicant_initialized(global)) {
2870 wpa_supplicant_deinit(global);
2871 return NULL;
2872 }
2874 for (i = 0; wpa_drivers[i]; i++)
2875 global->drv_count++;
2876 if (global->drv_count == 0) {
2877 wpa_printf(MSG_ERROR, "No drivers enabled");
2878 wpa_supplicant_deinit(global);
2879 return NULL;
2880 }
2881 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2882 if (global->drv_priv == NULL) {
2883 wpa_supplicant_deinit(global);
2884 return NULL;
2885 }
2887 return global;
2888 }
2891 /**
2892 * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2893 * @global: Pointer to global data from wpa_supplicant_init()
2894 * Returns: 0 after successful event loop run, -1 on failure
2895 *
2896 * This function starts the main event loop and continues running as long as
2897 * there are any remaining events. In most cases, this function is running as
2898 * long as the %wpa_supplicant process in still in use.
2899 */
2900 int wpa_supplicant_run(struct wpa_global *global)
2901 {
2902 struct wpa_supplicant *wpa_s;
2904 if (global->params.daemonize &&
2905 wpa_supplicant_daemon(global->params.pid_file))
2906 return -1;
2908 if (global->params.wait_for_monitor) {
2909 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2910 if (wpa_s->ctrl_iface)
2911 wpa_supplicant_ctrl_iface_wait(
2912 wpa_s->ctrl_iface);
2913 }
2915 eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2916 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2918 eloop_run();
2920 return 0;
2921 }
2924 /**
2925 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2926 * @global: Pointer to global data from wpa_supplicant_init()
2927 *
2928 * This function is called to deinitialize %wpa_supplicant and to free all
2929 * allocated resources. Remaining network interfaces will also be removed.
2930 */
2931 void wpa_supplicant_deinit(struct wpa_global *global)
2932 {
2933 int i;
2935 if (global == NULL)
2936 return;
2938 #ifdef CONFIG_P2P
2939 wpas_p2p_deinit_global(global);
2940 #endif /* CONFIG_P2P */
2942 while (global->ifaces)
2943 wpa_supplicant_remove_iface(global, global->ifaces, 1);
2945 if (global->ctrl_iface)
2946 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2948 wpas_notify_supplicant_deinitialized(global);
2950 eap_peer_unregister_methods();
2951 #ifdef CONFIG_AP
2952 eap_server_unregister_methods();
2953 #endif /* CONFIG_AP */
2955 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2956 if (!global->drv_priv[i])
2957 continue;
2958 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2959 }
2960 os_free(global->drv_priv);
2962 random_deinit();
2964 eloop_destroy();
2966 if (global->params.pid_file) {
2967 os_daemonize_terminate(global->params.pid_file);
2968 os_free(global->params.pid_file);
2969 }
2970 os_free(global->params.ctrl_interface);
2971 os_free(global->params.override_driver);
2972 os_free(global->params.override_ctrl_interface);
2974 os_free(global);
2975 wpa_debug_close_syslog();
2976 wpa_debug_close_file();
2977 }
2980 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2981 {
2982 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
2983 wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
2984 char country[3];
2985 country[0] = wpa_s->conf->country[0];
2986 country[1] = wpa_s->conf->country[1];
2987 country[2] = '\0';
2988 if (wpa_drv_set_country(wpa_s, country) < 0) {
2989 wpa_printf(MSG_ERROR, "Failed to set country code "
2990 "'%s'", country);
2991 }
2992 }
2994 #ifdef CONFIG_WPS
2995 wpas_wps_update_config(wpa_s);
2996 #endif /* CONFIG_WPS */
2998 #ifdef CONFIG_P2P
2999 wpas_p2p_update_config(wpa_s);
3000 #endif /* CONFIG_P2P */
3002 wpa_s->conf->changed_parameters = 0;
3003 }
3006 static void add_freq(int *freqs, int *num_freqs, int freq)
3007 {
3008 int i;
3010 for (i = 0; i < *num_freqs; i++) {
3011 if (freqs[i] == freq)
3012 return;
3013 }
3015 freqs[*num_freqs] = freq;
3016 (*num_freqs)++;
3017 }
3020 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
3021 {
3022 struct wpa_bss *bss, *cbss;
3023 const int max_freqs = 10;
3024 int *freqs;
3025 int num_freqs = 0;
3027 freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
3028 if (freqs == NULL)
3029 return NULL;
3031 cbss = wpa_s->current_bss;
3033 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
3034 if (bss == cbss)
3035 continue;
3036 if (bss->ssid_len == cbss->ssid_len &&
3037 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
3038 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
3039 add_freq(freqs, &num_freqs, bss->freq);
3040 if (num_freqs == max_freqs)
3041 break;
3042 }
3043 }
3045 if (num_freqs == 0) {
3046 os_free(freqs);
3047 freqs = NULL;
3048 }
3050 return freqs;
3051 }
3054 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
3055 {
3056 int timeout;
3057 int count;
3058 int *freqs = NULL;
3060 /*
3061 * Remove possible authentication timeout since the connection failed.
3062 */
3063 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
3065 /*
3066 * Add the failed BSSID into the blacklist and speed up next scan
3067 * attempt if there could be other APs that could accept association.
3068 * The current blacklist count indicates how many times we have tried
3069 * connecting to this AP and multiple attempts mean that other APs are
3070 * either not available or has already been tried, so that we can start
3071 * increasing the delay here to avoid constant scanning.
3072 */
3073 count = wpa_blacklist_add(wpa_s, bssid);
3074 if (count == 1 && wpa_s->current_bss) {
3075 /*
3076 * This BSS was not in the blacklist before. If there is
3077 * another BSS available for the same ESS, we should try that
3078 * next. Otherwise, we may as well try this one once more
3079 * before allowing other, likely worse, ESSes to be considered.
3080 */
3081 freqs = get_bss_freqs_in_ess(wpa_s);
3082 if (freqs) {
3083 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
3084 "has been seen; try it next");
3085 wpa_blacklist_add(wpa_s, bssid);
3086 /*
3087 * On the next scan, go through only the known channels
3088 * used in this ESS based on previous scans to speed up
3089 * common load balancing use case.
3090 */
3091 os_free(wpa_s->next_scan_freqs);
3092 wpa_s->next_scan_freqs = freqs;
3093 }
3094 }
3096 switch (count) {
3097 case 1:
3098 timeout = 100;
3099 break;
3100 case 2:
3101 timeout = 500;
3102 break;
3103 case 3:
3104 timeout = 1000;
3105 break;
3106 default:
3107 timeout = 5000;
3108 }
3110 /*
3111 * TODO: if more than one possible AP is available in scan results,
3112 * could try the other ones before requesting a new scan.
3113 */
3114 wpa_supplicant_req_scan(wpa_s, timeout / 1000,
3115 1000 * (timeout % 1000));
3116 }
3119 int wpas_driver_bss_selection(struct wpa_supplicant *wpa_s)
3120 {
3121 return wpa_s->conf->ap_scan == 2 ||
3122 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION);
3123 }