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Include aes_unwrap in build when needed (FT and EAP-FAST server)
[thirdparty/hostap.git] / wpa_supplicant / events.c
CommitLineData
6fc6879b
JM		 1/*
2 * WPA Supplicant - Driver event processing
3 * Copyright (c) 2003-2008, 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
15#include "includes.h"
16
17#include "common.h"
18#include "eapol_supp/eapol_supp_sm.h"
19#include "wpa.h"
20#include "eloop.h"
6fc6879b
JM		 21#include "config.h"
22#include "l2_packet/l2_packet.h"
23#include "wpa_supplicant_i.h"
2d5b792d 24#include "driver_i.h"
6fc6879b
JM		 25#include "pcsc_funcs.h"
26#include "preauth.h"
27#include "pmksa_cache.h"
28#include "wpa_ctrl.h"
29#include "eap_peer/eap.h"
8bac466b 30#include "notify.h"
6fc6879b
JM		 31#include "ieee802_11_defs.h"
32#include "blacklist.h"
33#include "wpas_glue.h"
351f09a2 34#include "wps_supplicant.h"
11ef8d35 35#include "ibss_rsn.h"
c2a04078 36#include "sme.h"
60b94c98 37#include "bgscan.h"
6fc6879b
JM		 38
39
40static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
41{
8bac466b 42 struct wpa_ssid *ssid, *old_ssid;
6fc6879b
JM		 43
44 if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
45 return 0;
46
47 wpa_printf(MSG_DEBUG, "Select network based on association "
48 "information");
49 ssid = wpa_supplicant_get_ssid(wpa_s);
50 if (ssid == NULL) {
51 wpa_printf(MSG_INFO, "No network configuration found for the "
52 "current AP");
53 return -1;
54 }
55
56 if (ssid->disabled) {
57 wpa_printf(MSG_DEBUG, "Selected network is disabled");
58 return -1;
59 }
60
61 wpa_printf(MSG_DEBUG, "Network configuration found for the current "
62 "AP");
63 if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
64 WPA_KEY_MGMT_WPA_NONE |
56586197
JM		 65 WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
66 WPA_KEY_MGMT_PSK_SHA256 |
67 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
6fc6879b
JM		 68 u8 wpa_ie[80];
69 size_t wpa_ie_len = sizeof(wpa_ie);
70 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
71 wpa_ie, &wpa_ie_len);
72 } else {
73 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
74 }
75
76 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
77 eapol_sm_invalidate_cached_session(wpa_s->eapol);
8bac466b 78 old_ssid = wpa_s->current_ssid;
6fc6879b
JM		 79 wpa_s->current_ssid = ssid;
80 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
81 wpa_supplicant_initiate_eapol(wpa_s);
8bac466b
JM		 82 if (old_ssid != wpa_s->current_ssid)
83 wpas_notify_network_changed(wpa_s);
6fc6879b
JM		 84
85 return 0;
86}
87
88
89static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
90 void *sock_ctx)
91{
92 struct wpa_supplicant *wpa_s = eloop_ctx;
93
94 if (wpa_s->countermeasures) {
95 wpa_s->countermeasures = 0;
96 wpa_drv_set_countermeasures(wpa_s, 0);
97 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
98 wpa_supplicant_req_scan(wpa_s, 0, 0);
99 }
100}
101
102
103void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
104{
8bac466b
JM		 105 int bssid_changed;
106
6fc6879b 107 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
8bac466b 108 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
6fc6879b
JM		 109 os_memset(wpa_s->bssid, 0, ETH_ALEN);
110 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b
JM		 111 if (bssid_changed)
112 wpas_notify_bssid_changed(wpa_s);
113
6fc6879b
JM		 114 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
115 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
56586197 116 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
6fc6879b
JM		 117 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
118 wpa_s->ap_ies_from_associnfo = 0;
119}
120
121
122static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
123{
124 struct wpa_ie_data ie;
125 int pmksa_set = -1;
126 size_t i;
127
128 if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
129 ie.pmkid == NULL)
130 return;
131
132 for (i = 0; i < ie.num_pmkid; i++) {
133 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
134 ie.pmkid + i * PMKID_LEN,
135 NULL, NULL, 0);
136 if (pmksa_set == 0) {
137 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
138 break;
139 }
140 }
141
142 wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
143 "cache", pmksa_set == 0 ? "" : "not ");
144}
145
146
147static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
148 union wpa_event_data *data)
149{
150 if (data == NULL) {
151 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
152 return;
153 }
154 wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
155 " index=%d preauth=%d",
156 MAC2STR(data->pmkid_candidate.bssid),
157 data->pmkid_candidate.index,
158 data->pmkid_candidate.preauth);
159
160 pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
161 data->pmkid_candidate.index,
162 data->pmkid_candidate.preauth);
163}
164
165
166static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
167{
168 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
169 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
170 return 0;
171
172#ifdef IEEE8021X_EAPOL
173 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
174 wpa_s->current_ssid &&
175 !(wpa_s->current_ssid->eapol_flags &
176 (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
177 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
178 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
179 * plaintext or static WEP keys). */
180 return 0;
181 }
182#endif /* IEEE8021X_EAPOL */
183
184 return 1;
185}
186
187
188/**
189 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
190 * @wpa_s: pointer to wpa_supplicant data
191 * @ssid: Configuration data for the network
192 * Returns: 0 on success, -1 on failure
193 *
194 * This function is called when starting authentication with a network that is
195 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
196 */
197int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
198 struct wpa_ssid *ssid)
199{
200#ifdef IEEE8021X_EAPOL
201 int aka = 0, sim = 0, type;
202
203 if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
204 return 0;
205
206 if (ssid->eap.eap_methods == NULL) {
207 sim = 1;
208 aka = 1;
209 } else {
210 struct eap_method_type *eap = ssid->eap.eap_methods;
211 while (eap->vendor != EAP_VENDOR_IETF ||
212 eap->method != EAP_TYPE_NONE) {
213 if (eap->vendor == EAP_VENDOR_IETF) {
214 if (eap->method == EAP_TYPE_SIM)
215 sim = 1;
216 else if (eap->method == EAP_TYPE_AKA)
217 aka = 1;
218 }
219 eap++;
220 }
221 }
222
223 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
224 sim = 0;
225 if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
226 aka = 0;
227
228 if (!sim && !aka) {
229 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
230 "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
231 return 0;
232 }
233
234 wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
235 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
236 if (sim && aka)
237 type = SCARD_TRY_BOTH;
238 else if (aka)
239 type = SCARD_USIM_ONLY;
240 else
241 type = SCARD_GSM_SIM_ONLY;
242
243 wpa_s->scard = scard_init(type);
244 if (wpa_s->scard == NULL) {
245 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
246 "(pcsc-lite)");
247 return -1;
248 }
249 wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
250 eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
251#endif /* IEEE8021X_EAPOL */
252
253 return 0;
254}
255
256
257#ifndef CONFIG_NO_SCAN_PROCESSING
258static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
259 struct wpa_ssid *ssid)
260{
261 int i, privacy = 0;
262
263 if (ssid->mixed_cell)
264 return 1;
265
0632542b
AT		 266#ifdef CONFIG_WPS
267 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
268 return 1;
269#endif /* CONFIG_WPS */
270
6fc6879b
JM		 271 for (i = 0; i < NUM_WEP_KEYS; i++) {
272 if (ssid->wep_key_len[i]) {
273 privacy = 1;
274 break;
275 }
276 }
277#ifdef IEEE8021X_EAPOL
278 if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
279 ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
280 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
281 privacy = 1;
282#endif /* IEEE8021X_EAPOL */
283
284 if (bss->caps & IEEE80211_CAP_PRIVACY)
285 return privacy;
286 return !privacy;
287}
288
289
a6099152
JM		 290static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
291 struct wpa_ssid *ssid,
6fc6879b
JM		 292 struct wpa_scan_res *bss)
293{
294 struct wpa_ie_data ie;
295 int proto_match = 0;
296 const u8 *rsn_ie, *wpa_ie;
351f09a2 297 int ret;
6fc6879b 298
a6099152 299 ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
351f09a2
JM		 300 if (ret >= 0)
301 return ret;
ad08c363 302
6fc6879b
JM		 303 rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
304 while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
305 proto_match++;
306
307 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
308 wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed");
309 break;
310 }
311 if (!(ie.proto & ssid->proto)) {
312 wpa_printf(MSG_DEBUG, " skip RSN IE - proto "
313 "mismatch");
314 break;
315 }
316
317 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
318 wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher "
319 "mismatch");
320 break;
321 }
322
323 if (!(ie.group_cipher & ssid->group_cipher)) {
324 wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher "
325 "mismatch");
326 break;
327 }
328
329 if (!(ie.key_mgmt & ssid->key_mgmt)) {
330 wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt "
331 "mismatch");
332 break;
333 }
334
335#ifdef CONFIG_IEEE80211W
0b60b0aa
JM		 336 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
337 ssid->ieee80211w == IEEE80211W_REQUIRED) {
6fc6879b
JM		 338 wpa_printf(MSG_DEBUG, " skip RSN IE - no mgmt frame "
339 "protection");
340 break;
341 }
342#endif /* CONFIG_IEEE80211W */
343
344 wpa_printf(MSG_DEBUG, " selected based on RSN IE");
345 return 1;
346 }
347
348 wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
349 while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
350 proto_match++;
351
352 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
353 wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed");
354 break;
355 }
356 if (!(ie.proto & ssid->proto)) {
357 wpa_printf(MSG_DEBUG, " skip WPA IE - proto "
358 "mismatch");
359 break;
360 }
361
362 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
363 wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher "
364 "mismatch");
365 break;
366 }
367
368 if (!(ie.group_cipher & ssid->group_cipher)) {
369 wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher "
370 "mismatch");
371 break;
372 }
373
374 if (!(ie.key_mgmt & ssid->key_mgmt)) {
375 wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt "
376 "mismatch");
377 break;
378 }
379
380 wpa_printf(MSG_DEBUG, " selected based on WPA IE");
381 return 1;
382 }
383
384 if (proto_match == 0)
385 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match");
386
387 return 0;
388}
389
390
391static struct wpa_scan_res *
9cf32261
JM		 392wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
393 struct wpa_ssid *group,
394 struct wpa_ssid **selected_ssid)
6fc6879b
JM		 395{
396 struct wpa_ssid *ssid;
9cf32261 397 struct wpa_scan_res *bss;
6fc6879b
JM		 398 size_t i;
399 struct wpa_blacklist *e;
400 const u8 *ie;
401
6fc6879b 402 wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
9cf32261 403 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 404 const u8 *ssid_;
405 u8 wpa_ie_len, rsn_ie_len, ssid_len;
406 bss = wpa_s->scan_res->res[i];
407
408 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
409 ssid_ = ie ? ie + 2 : (u8 *) "";
410 ssid_len = ie ? ie[1] : 0;
411
412 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
413 wpa_ie_len = ie ? ie[1] : 0;
414
415 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
416 rsn_ie_len = ie ? ie[1] : 0;
417
418 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
419 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
420 (int) i, MAC2STR(bss->bssid),
421 wpa_ssid_txt(ssid_, ssid_len),
422 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 423
6fc6879b
JM		 424 e = wpa_blacklist_get(wpa_s, bss->bssid);
425 if (e && e->count > 1) {
426 wpa_printf(MSG_DEBUG, " skip - blacklisted");
427 continue;
428 }
429
430 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
431 wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE");
432 continue;
433 }
434
435 for (ssid = group; ssid; ssid = ssid->pnext) {
ad08c363
JM		 436 int check_ssid = 1;
437
6fc6879b
JM		 438 if (ssid->disabled) {
439 wpa_printf(MSG_DEBUG, " skip - disabled");
440 continue;
441 }
9cf32261 442
ad08c363
JM		 443#ifdef CONFIG_WPS
444 if (ssid->ssid_len == 0 &&
a6099152 445 wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
ad08c363
JM		 446 check_ssid = 0;
447#endif /* CONFIG_WPS */
448
449 if (check_ssid &&
450 (ssid_len != ssid->ssid_len ||
451 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
6fc6879b
JM		 452 wpa_printf(MSG_DEBUG, " skip - "
453 "SSID mismatch");
454 continue;
455 }
9cf32261 456
6fc6879b
JM		 457 if (ssid->bssid_set &&
458 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
459 {
460 wpa_printf(MSG_DEBUG, " skip - "
461 "BSSID mismatch");
462 continue;
463 }
9cf32261 464
a6099152 465 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
9cf32261
JM		 466 continue;
467
468 wpa_printf(MSG_DEBUG, " selected WPA AP "
469 MACSTR " ssid='%s'",
470 MAC2STR(bss->bssid),
471 wpa_ssid_txt(ssid_, ssid_len));
472 *selected_ssid = ssid;
473 return bss;
6fc6879b
JM		 474 }
475 }
476
9cf32261
JM		 477 return NULL;
478}
479
480
481static struct wpa_scan_res *
482wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
483 struct wpa_ssid *group,
484 struct wpa_ssid **selected_ssid)
485{
486 struct wpa_ssid *ssid;
487 struct wpa_scan_res *bss;
488 size_t i;
489 struct wpa_blacklist *e;
490 const u8 *ie;
491
6fc6879b 492 wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
9cf32261 493 for (i = 0; i < wpa_s->scan_res->num; i++) {
6fc6879b
JM		 494 const u8 *ssid_;
495 u8 wpa_ie_len, rsn_ie_len, ssid_len;
496 bss = wpa_s->scan_res->res[i];
497
498 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
499 ssid_ = ie ? ie + 2 : (u8 *) "";
500 ssid_len = ie ? ie[1] : 0;
501
502 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
503 wpa_ie_len = ie ? ie[1] : 0;
504
505 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
506 rsn_ie_len = ie ? ie[1] : 0;
507
508 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
509 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
510 (int) i, MAC2STR(bss->bssid),
511 wpa_ssid_txt(ssid_, ssid_len),
512 wpa_ie_len, rsn_ie_len, bss->caps);
9cf32261 513
6fc6879b
JM		 514 e = wpa_blacklist_get(wpa_s, bss->bssid);
515 if (e && e->count > 1) {
516 wpa_printf(MSG_DEBUG, " skip - blacklisted");
517 continue;
518 }
9cf32261 519
6fc6879b 520 for (ssid = group; ssid; ssid = ssid->pnext) {
ad08c363
JM		 521 int check_ssid = ssid->ssid_len != 0;
522
6fc6879b
JM		 523 if (ssid->disabled) {
524 wpa_printf(MSG_DEBUG, " skip - disabled");
525 continue;
526 }
9cf32261 527
ad08c363
JM		 528#ifdef CONFIG_WPS
529 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
530 /* Only allow wildcard SSID match if an AP
531 * advertises active WPS operation that matches
532 * with our mode. */
533 check_ssid = 1;
534 if (ssid->ssid_len == 0 &&
a6099152
JM		 535 wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
536 bss))
ad08c363
JM		 537 check_ssid = 0;
538 }
539#endif /* CONFIG_WPS */
540
541 if (check_ssid &&
6fc6879b
JM		 542 (ssid_len != ssid->ssid_len ||
543 os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
544 wpa_printf(MSG_DEBUG, " skip - "
545 "SSID mismatch");
546 continue;
547 }
548
549 if (ssid->bssid_set &&
550 os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
551 {
552 wpa_printf(MSG_DEBUG, " skip - "
553 "BSSID mismatch");
554 continue;
555 }
1bd3f426 556
6fc6879b 557 if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
ad08c363 558 !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
6fc6879b
JM		 559 !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
560 {
561 wpa_printf(MSG_DEBUG, " skip - "
562 "non-WPA network not allowed");
563 continue;
564 }
565
1bd3f426 566 if ((ssid->key_mgmt &
56586197
JM		 567 (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
568 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
569 WPA_KEY_MGMT_IEEE8021X_SHA256 |
570 WPA_KEY_MGMT_PSK_SHA256)) &&
6fc6879b
JM		 571 (wpa_ie_len != 0 || rsn_ie_len != 0)) {
572 wpa_printf(MSG_DEBUG, " skip - "
573 "WPA network");
574 continue;
575 }
576
577 if (!wpa_supplicant_match_privacy(bss, ssid)) {
578 wpa_printf(MSG_DEBUG, " skip - "
579 "privacy mismatch");
580 continue;
581 }
582
583 if (bss->caps & IEEE80211_CAP_IBSS) {
584 wpa_printf(MSG_DEBUG, " skip - "
585 "IBSS (adhoc) network");
586 continue;
587 }
588
6fc6879b
JM		 589 wpa_printf(MSG_DEBUG, " selected non-WPA AP "
590 MACSTR " ssid='%s'",
591 MAC2STR(bss->bssid),
592 wpa_ssid_txt(ssid_, ssid_len));
9cf32261
JM		 593 *selected_ssid = ssid;
594 return bss;
6fc6879b
JM		 595 }
596 }
597
9cf32261
JM		 598 return NULL;
599}
600
601
602static struct wpa_scan_res *
603wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
604 struct wpa_ssid **selected_ssid)
605{
606 struct wpa_scan_res *selected;
607
608 wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
609 group->priority);
610
611 /* First, try to find WPA-enabled AP */
612 selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
613 if (selected)
614 return selected;
615
616 /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
617 * allows this. */
618 return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
6fc6879b
JM		 619}
620
621
09b9df4e
JM		 622static struct wpa_scan_res *
623wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
624 struct wpa_ssid **selected_ssid)
6fc6879b 625{
6fc6879b 626 struct wpa_scan_res *selected = NULL;
09b9df4e
JM		 627 int prio;
628
629 while (selected == NULL) {
630 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
631 selected = wpa_supplicant_select_bss(
632 wpa_s, wpa_s->conf->pssid[prio],
633 selected_ssid);
634 if (selected)
635 break;
636 }
637
638 if (selected == NULL && wpa_s->blacklist) {
639 wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
640 "and try again");
641 wpa_blacklist_clear(wpa_s);
642 wpa_s->blacklist_cleared++;
643 } else if (selected == NULL)
644 break;
645 }
646
647 return selected;
648}
649
650
651static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
652 int timeout)
653{
654 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
655 /*
656 * Quick recovery if the initial scan results were not
657 * complete when fetched before the first scan request.
658 */
659 wpa_s->scan_res_tried++;
660 timeout = 0;
661 }
662 wpa_supplicant_req_scan(wpa_s, timeout, 0);
663}
664
665
666static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
667 struct wpa_scan_res *selected,
668 struct wpa_ssid *ssid)
669{
670 if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
671 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
672 "PBC session overlap");
673 wpa_supplicant_req_new_scan(wpa_s, 10);
674 return;
675 }
676
677 /*
678 * Do not trigger new association unless the BSSID has changed or if
679 * reassociation is requested. If we are in process of associating with
680 * the selected BSSID, do not trigger new attempt.
681 */
682 if (wpa_s->reassociate ||
683 (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
684 (wpa_s->wpa_state != WPA_ASSOCIATING ||
685 os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
686 0))) {
687 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
688 wpa_supplicant_req_new_scan(wpa_s, 10);
689 return;
690 }
691 wpa_supplicant_associate(wpa_s, selected, ssid);
692 } else {
693 wpa_printf(MSG_DEBUG, "Already associated with the selected "
694 "AP");
695 }
696 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
697}
698
699
b55aaa5f
JM		 700static struct wpa_ssid *
701wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
702{
703 int prio;
704 struct wpa_ssid *ssid;
705
706 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
707 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
708 {
709 if (ssid->disabled)
710 continue;
711 if (ssid->mode == IEEE80211_MODE_IBSS ||
712 ssid->mode == IEEE80211_MODE_AP)
713 return ssid;
714 }
715 }
716 return NULL;
717}
718
719
09b9df4e
JM		 720static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
721{
722 struct wpa_scan_res *selected;
6fc6879b
JM		 723 struct wpa_ssid *ssid = NULL;
724
cb8564b1
DW		 725 wpa_supplicant_notify_scanning(wpa_s, 0);
726
6fc6879b
JM		 727 if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
728 if (wpa_s->conf->ap_scan == 2)
729 return;
730 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
731 "scanning again");
09b9df4e
JM		 732 wpa_supplicant_req_new_scan(wpa_s, 1);
733 return;
6fc6879b
JM		 734 }
735
23e07237
DN		 736 /*
737 * Don't post the results if this was the initial cached
738 * and there were no results.
739 */
740 if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
741 wpa_s->scan_res->num == 0) {
742 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
743 "empty - not posting");
744 } else {
745 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
8bac466b 746 wpas_notify_scan_results(wpa_s);
23e07237 747 }
6fc6879b 748
8bac466b
JM		 749 wpas_notify_scan_done(wpa_s, 1);
750
3180d7a2 751 if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
6fc6879b
JM		 752 return;
753
3180d7a2
SO		 754 if (wpa_s->disconnected) {
755 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
756 return;
757 }
758
60b94c98
JM		 759 if (bgscan_notify_scan(wpa_s) == 1)
760 return;
761
09b9df4e 762 selected = wpa_supplicant_pick_network(wpa_s, &ssid);
6fc6879b 763 if (selected) {
09b9df4e 764 wpa_supplicant_connect(wpa_s, selected, ssid);
6fc6879b 765 } else {
09b9df4e 766 wpa_printf(MSG_DEBUG, "No suitable network found");
b55aaa5f
JM		 767 ssid = wpa_supplicant_pick_new_network(wpa_s);
768 if (ssid) {
769 wpa_printf(MSG_DEBUG, "Setup a new network");
770 wpa_supplicant_associate(wpa_s, NULL, ssid);
771 } else
772 wpa_supplicant_req_new_scan(wpa_s, 5);
6fc6879b 773 }
6fc6879b
JM		 774}
775#endif /* CONFIG_NO_SCAN_PROCESSING */
776
777
c2a04078
JM		 778#ifdef CONFIG_IEEE80211R
779static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
780 const u8 *ftie, const u8 *mdie)
781{
782 const u8 *mobility_domain = NULL;
783 const u8 *r0kh_id = NULL;
784 size_t r0kh_id_len = 0;
785 const u8 *r1kh_id = NULL;
786 struct rsn_ftie *hdr;
787 const u8 *pos, *end;
788
789 if (mdie == NULL || ftie == NULL)
790 return;
791
792 if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
793 mobility_domain = mdie + 2;
794#ifdef CONFIG_SME
795 wpa_s->sme.ft_used = 1;
796 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
797#endif /* CONFIG_SME */
798 }
799 if (ftie[1] >= sizeof(struct rsn_ftie)) {
800 end = ftie + 2 + ftie[1];
801 hdr = (struct rsn_ftie *) (ftie + 2);
802 pos = (const u8 *) (hdr + 1);
803 while (pos + 1 < end) {
804 if (pos + 2 + pos[1] > end)
805 break;
806 if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
807 pos[1] == FT_R1KH_ID_LEN)
808 r1kh_id = pos + 2;
809 else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
810 pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
811 r0kh_id = pos + 2;
812 r0kh_id_len = pos[1];
813 }
814 pos += 2 + pos[1];
815 }
816 }
817 wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
818 r0kh_id_len, r1kh_id);
819}
820#endif /* CONFIG_IEEE80211R */
821
6fc6879b
JM		 822static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
823 union wpa_event_data *data)
824{
825 int l, len, found = 0, wpa_found, rsn_found;
c2a04078
JM		 826 const u8 *p;
827#ifdef CONFIG_IEEE80211R
828 const u8 *mdie = NULL, *ftie = NULL;
829#endif /* CONFIG_IEEE80211R */
6fc6879b
JM		 830
831 wpa_printf(MSG_DEBUG, "Association info event");
832 if (data->assoc_info.req_ies)
833 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
834 data->assoc_info.req_ies_len);
835 if (data->assoc_info.resp_ies)
836 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
837 data->assoc_info.resp_ies_len);
838 if (data->assoc_info.beacon_ies)
839 wpa_hexdump(MSG_DEBUG, "beacon_ies",
840 data->assoc_info.beacon_ies,
841 data->assoc_info.beacon_ies_len);
842
843 p = data->assoc_info.req_ies;
844 l = data->assoc_info.req_ies_len;
845
846 /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
847 while (p && l >= 2) {
848 len = p[1] + 2;
849 if (len > l) {
850 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
851 p, l);
852 break;
853 }
854 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
855 (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
856 (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
857 if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
858 break;
859 found = 1;
860 wpa_find_assoc_pmkid(wpa_s);
861 break;
862 }
863 l -= len;
864 p += len;
865 }
866 if (!found && data->assoc_info.req_ies)
867 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
868
c2a04078
JM		 869#ifdef CONFIG_IEEE80211R
870 p = data->assoc_info.resp_ies;
871 l = data->assoc_info.resp_ies_len;
872
94873e3b 873 /* Go through the IEs and make a copy of the FT/MD IE, if present. */
c2a04078
JM		 874 while (p && l >= 2) {
875 len = p[1] + 2;
876 if (len > l) {
877 wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
878 p, l);
879 break;
880 }
881 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
882 ftie = p;
883 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
884 mdie = p;
885 l -= len;
886 p += len;
887 }
888
889 wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
890#endif /* CONFIG_IEEE80211R */
891
6fc6879b
JM		 892 /* WPA/RSN IE from Beacon/ProbeResp */
893 p = data->assoc_info.beacon_ies;
894 l = data->assoc_info.beacon_ies_len;
895
896 /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
897 */
898 wpa_found = rsn_found = 0;
899 while (p && l >= 2) {
900 len = p[1] + 2;
901 if (len > l) {
902 wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
903 p, l);
904 break;
905 }
906 if (!wpa_found &&
907 p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
908 os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
909 wpa_found = 1;
910 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
911 }
912
913 if (!rsn_found &&
914 p[0] == WLAN_EID_RSN && p[1] >= 2) {
915 rsn_found = 1;
916 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
917 }
918
919 l -= len;
920 p += len;
921 }
922
923 if (!wpa_found && data->assoc_info.beacon_ies)
924 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
925 if (!rsn_found && data->assoc_info.beacon_ies)
926 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
927 if (wpa_found || rsn_found)
928 wpa_s->ap_ies_from_associnfo = 1;
929}
930
931
932static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
933 union wpa_event_data *data)
934{
935 u8 bssid[ETH_ALEN];
936 int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
8bac466b 937 int bssid_changed;
0194fedb 938 struct wpa_driver_capa capa;
6fc6879b
JM		 939
940 if (data)
941 wpa_supplicant_event_associnfo(wpa_s, data);
942
943 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
c2a04078 944 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
6fc6879b 945 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
c2a04078 946 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
6fc6879b
JM		 947 (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
948 os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
949 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
950 MACSTR, MAC2STR(bssid));
8bac466b 951 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
6fc6879b
JM		 952 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
953 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b
JM		 954 if (bssid_changed)
955 wpas_notify_bssid_changed(wpa_s);
956
6fc6879b
JM		 957 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
958 wpa_clear_keys(wpa_s, bssid);
959 }
960 if (wpa_supplicant_select_config(wpa_s) < 0) {
961 wpa_supplicant_disassociate(
962 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
963 return;
964 }
965 }
966
967 wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
968 if (wpa_s->current_ssid) {
969 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
970 * initialized before association, but for other modes,
971 * initialize PC/SC here, if the current configuration needs
972 * smartcard or SIM/USIM. */
973 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
974 }
975 wpa_sm_notify_assoc(wpa_s->wpa, bssid);
976 l2_packet_notify_auth_start(wpa_s->l2);
977
978 /*
979 * Set portEnabled first to FALSE in order to get EAP state machine out
980 * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
981 * state machine may transit to AUTHENTICATING state based on obsolete
982 * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
983 * AUTHENTICATED without ever giving chance to EAP state machine to
984 * reset the state.
985 */
986 if (!ft_completed) {
987 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
988 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
989 }
56586197 990 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
6fc6879b
JM		 991 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
992 /* 802.1X::portControl = Auto */
993 eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
994 wpa_s->eapol_received = 0;
995 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
996 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
997 wpa_supplicant_cancel_auth_timeout(wpa_s);
998 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
999 } else if (!ft_completed) {
1000 /* Timeout for receiving the first EAPOL packet */
1001 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1002 }
1003 wpa_supplicant_cancel_scan(wpa_s);
1004
c2a04078 1005 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
56586197 1006 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1007 /*
1008 * We are done; the driver will take care of RSN 4-way
1009 * handshake.
1010 */
1011 wpa_supplicant_cancel_auth_timeout(wpa_s);
1012 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1013 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1014 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1015 }
1ff73338
JM		 1016
1017 if (wpa_s->pending_eapol_rx) {
1018 struct os_time now, age;
1019 os_get_time(&now);
1020 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1021 if (age.sec == 0 && age.usec < 100000 &&
1022 os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1023 0) {
1024 wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1025 "that was received just before association "
1026 "notification");
1027 wpa_supplicant_rx_eapol(
1028 wpa_s, wpa_s->pending_eapol_rx_src,
1029 wpabuf_head(wpa_s->pending_eapol_rx),
1030 wpabuf_len(wpa_s->pending_eapol_rx));
1031 }
1032 wpabuf_free(wpa_s->pending_eapol_rx);
1033 wpa_s->pending_eapol_rx = NULL;
1034 }
60b94c98
JM		 1035
1036#ifdef CONFIG_BGSCAN
1037 if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1038 bgscan_deinit(wpa_s);
1039 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1040 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1041 wpa_printf(MSG_DEBUG, "Failed to initialize "
1042 "bgscan");
1043 /*
1044 * Live without bgscan; it is only used as a
1045 * roaming optimization, so the initial
1046 * connection is not affected.
1047 */
1048 } else
1049 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1050 } else
1051 wpa_s->bgscan_ssid = NULL;
1052 }
1053#endif /* CONFIG_BGSCAN */
0194fedb
JB		 1054
1055 if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1056 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1057 wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1058 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1059 /* Set static WEP keys again */
1060 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1061 }
6fc6879b
JM		 1062}
1063
1064
1065static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1066{
1067 const u8 *bssid;
1068
1069 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1070 /*
1071 * At least Host AP driver and a Prism3 card seemed to be
1072 * generating streams of disconnected events when configuring
1073 * IBSS for WPA-None. Ignore them for now.
1074 */
1075 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1076 "IBSS/WPA-None mode");
1077 return;
1078 }
1079
1080 if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
56586197 1081 wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
6fc6879b
JM		 1082 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1083 "pre-shared key may be incorrect");
1084 }
1085 if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1086 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1087 bssid = wpa_s->bssid;
a8e16edc 1088 if (is_zero_ether_addr(bssid))
6fc6879b
JM		 1089 bssid = wpa_s->pending_bssid;
1090 wpa_blacklist_add(wpa_s, bssid);
1091 wpa_sm_notify_disassoc(wpa_s->wpa);
1092 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1093 "remove keys");
1094 if (wpa_supplicant_dynamic_keys(wpa_s)) {
1095 wpa_s->keys_cleared = 0;
1096 wpa_clear_keys(wpa_s, wpa_s->bssid);
1097 }
1098 wpa_supplicant_mark_disassoc(wpa_s);
60b94c98 1099 bgscan_deinit(wpa_s);
6fc6879b
JM		 1100}
1101
1102
46690a3b
JM		 1103#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1104static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1105 void *sock_ctx)
1106{
1107 struct wpa_supplicant *wpa_s = eloop_ctx;
1108
1109 if (!wpa_s->pending_mic_error_report)
1110 return;
1111
1112 wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1113 wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1114 wpa_s->pending_mic_error_report = 0;
1115}
1116#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1117
1118
6fc6879b
JM		 1119static void
1120wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1121 union wpa_event_data *data)
1122{
1123 int pairwise;
1124 struct os_time t;
1125
1126 wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1127 pairwise = (data && data->michael_mic_failure.unicast);
6fc6879b 1128 os_get_time(&t);
46690a3b
JM		 1129 if ((wpa_s->last_michael_mic_error &&
1130 t.sec - wpa_s->last_michael_mic_error <= 60) ||
1131 wpa_s->pending_mic_error_report) {
1132 if (wpa_s->pending_mic_error_report) {
1133 /*
1134 * Send the pending MIC error report immediately since
1135 * we are going to start countermeasures and AP better
1136 * do the same.
1137 */
1138 wpa_sm_key_request(wpa_s->wpa, 1,
1139 wpa_s->pending_mic_error_pairwise);
1140 }
1141
1142 /* Send the new MIC error report immediately since we are going
1143 * to start countermeasures and AP better do the same.
1144 */
1145 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1146
6fc6879b
JM		 1147 /* initialize countermeasures */
1148 wpa_s->countermeasures = 1;
1149 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1150
1151 /*
1152 * Need to wait for completion of request frame. We do not get
1153 * any callback for the message completion, so just wait a
1154 * short while and hope for the best. */
1155 os_sleep(0, 10000);
1156
1157 wpa_drv_set_countermeasures(wpa_s, 1);
1158 wpa_supplicant_deauthenticate(wpa_s,
1159 WLAN_REASON_MICHAEL_MIC_FAILURE);
1160 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1161 wpa_s, NULL);
1162 eloop_register_timeout(60, 0,
1163 wpa_supplicant_stop_countermeasures,
1164 wpa_s, NULL);
1165 /* TODO: mark the AP rejected for 60 second. STA is
1166 * allowed to associate with another AP.. */
46690a3b
JM		 1167 } else {
1168#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1169 if (wpa_s->mic_errors_seen) {
1170 /*
1171 * Reduce the effectiveness of Michael MIC error
1172 * reports as a means for attacking against TKIP if
1173 * more than one MIC failure is noticed with the same
1174 * PTK. We delay the transmission of the reports by a
1175 * random time between 0 and 60 seconds in order to
1176 * force the attacker wait 60 seconds before getting
1177 * the information on whether a frame resulted in a MIC
1178 * failure.
1179 */
1180 u8 rval[4];
1181 int sec;
1182
1183 if (os_get_random(rval, sizeof(rval)) < 0)
1184 sec = os_random() % 60;
1185 else
1186 sec = WPA_GET_BE32(rval) % 60;
1187 wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1188 "seconds", sec);
1189 wpa_s->pending_mic_error_report = 1;
1190 wpa_s->pending_mic_error_pairwise = pairwise;
1191 eloop_cancel_timeout(
1192 wpa_supplicant_delayed_mic_error_report,
1193 wpa_s, NULL);
1194 eloop_register_timeout(
1195 sec, os_random() % 1000000,
1196 wpa_supplicant_delayed_mic_error_report,
1197 wpa_s, NULL);
1198 } else {
1199 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1200 }
1201#else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1202 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1203#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
6fc6879b
JM		 1204 }
1205 wpa_s->last_michael_mic_error = t.sec;
46690a3b 1206 wpa_s->mic_errors_seen++;
6fc6879b
JM		 1207}
1208
1209
a83d9c96
SL		 1210#ifdef CONFIG_TERMINATE_ONLASTIF
1211static int any_interfaces(struct wpa_supplicant *head)
1212{
1213 struct wpa_supplicant *wpa_s;
1214
1215 for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1216 if (!wpa_s->interface_removed)
1217 return 1;
1218 return 0;
1219}
1220#endif /* CONFIG_TERMINATE_ONLASTIF */
1221
1222
6fc6879b
JM		 1223static void
1224wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1225 union wpa_event_data *data)
1226{
1227 if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1228 return;
1229
1230 switch (data->interface_status.ievent) {
1231 case EVENT_INTERFACE_ADDED:
1232 if (!wpa_s->interface_removed)
1233 break;
1234 wpa_s->interface_removed = 0;
1235 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1236 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1237 wpa_printf(MSG_INFO, "Failed to initialize the driver "
1238 "after interface was added.");
1239 }
1240 break;
1241 case EVENT_INTERFACE_REMOVED:
1242 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1243 wpa_s->interface_removed = 1;
1244 wpa_supplicant_mark_disassoc(wpa_s);
1245 l2_packet_deinit(wpa_s->l2);
1246 wpa_s->l2 = NULL;
a83d9c96
SL		 1247#ifdef CONFIG_TERMINATE_ONLASTIF
1248 /* check if last interface */
1249 if (!any_interfaces(wpa_s->global->ifaces))
1250 eloop_terminate();
1251#endif /* CONFIG_TERMINATE_ONLASTIF */
6fc6879b
JM		 1252 break;
1253 }
1254}
1255
1256
1257#ifdef CONFIG_PEERKEY
1258static void
1259wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1260 union wpa_event_data *data)
1261{
1262 if (data == NULL)
1263 return;
1264 wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1265}
1266#endif /* CONFIG_PEERKEY */
1267
1268
1269#ifdef CONFIG_IEEE80211R
1270static void
1271wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1272 union wpa_event_data *data)
1273{
1274 if (data == NULL)
1275 return;
1276
1277 if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1278 data->ft_ies.ies_len,
1279 data->ft_ies.ft_action,
babfbf15
JM		 1280 data->ft_ies.target_ap,
1281 data->ft_ies.ric_ies,
1282 data->ft_ies.ric_ies_len) < 0) {
6fc6879b
JM		 1283 /* TODO: prevent MLME/driver from trying to associate? */
1284 }
1285}
1286#endif /* CONFIG_IEEE80211R */
1287
1288
11ef8d35
JM		 1289#ifdef CONFIG_IBSS_RSN
1290static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1291 union wpa_event_data *data)
1292{
1293 if (data == NULL)
1294 return;
1295 ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1296}
1297#endif /* CONFIG_IBSS_RSN */
1298
1299
6fc6879b
JM		 1300void wpa_supplicant_event(void *ctx, wpa_event_type event,
1301 union wpa_event_data *data)
1302{
1303 struct wpa_supplicant *wpa_s = ctx;
1304
1305 switch (event) {
c2a04078
JM		 1306 case EVENT_AUTH:
1307 sme_event_auth(wpa_s, data);
1308 break;
6fc6879b
JM		 1309 case EVENT_ASSOC:
1310 wpa_supplicant_event_assoc(wpa_s, data);
1311 break;
c2a04078 1312 case EVENT_DEAUTH:
6fc6879b
JM		 1313 case EVENT_DISASSOC:
1314 wpa_supplicant_event_disassoc(wpa_s);
1315 break;
1316 case EVENT_MICHAEL_MIC_FAILURE:
1317 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1318 break;
1319#ifndef CONFIG_NO_SCAN_PROCESSING
1320 case EVENT_SCAN_RESULTS:
1321 wpa_supplicant_event_scan_results(wpa_s);
1322 break;
1323#endif /* CONFIG_NO_SCAN_PROCESSING */
1324 case EVENT_ASSOCINFO:
1325 wpa_supplicant_event_associnfo(wpa_s, data);
1326 break;
1327 case EVENT_INTERFACE_STATUS:
1328 wpa_supplicant_event_interface_status(wpa_s, data);
1329 break;
1330 case EVENT_PMKID_CANDIDATE:
1331 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1332 break;
1333#ifdef CONFIG_PEERKEY
1334 case EVENT_STKSTART:
1335 wpa_supplicant_event_stkstart(wpa_s, data);
1336 break;
1337#endif /* CONFIG_PEERKEY */
1338#ifdef CONFIG_IEEE80211R
1339 case EVENT_FT_RESPONSE:
1340 wpa_supplicant_event_ft_response(wpa_s, data);
1341 break;
1342#endif /* CONFIG_IEEE80211R */
11ef8d35
JM		 1343#ifdef CONFIG_IBSS_RSN
1344 case EVENT_IBSS_RSN_START:
1345 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1346 break;
1347#endif /* CONFIG_IBSS_RSN */
efa46078
JM		 1348 case EVENT_ASSOC_REJECT:
1349 sme_event_assoc_reject(wpa_s, data);
1350 break;
da1fb17c
JM		 1351 case EVENT_AUTH_TIMED_OUT:
1352 sme_event_auth_timed_out(wpa_s, data);
1353 break;
1354 case EVENT_ASSOC_TIMED_OUT:
1355 sme_event_assoc_timed_out(wpa_s, data);
1356 break;
6fc6879b
JM		 1357 default:
1358 wpa_printf(MSG_INFO, "Unknown event %d", event);
1359 break;
1360 }
1361}
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